| 1 | /* PowerPC64-specific support for 64-bit ELF. |
| 2 | Copyright (C) 1999-2020 Free Software Foundation, Inc. |
| 3 | Written by Linus Nordberg, Swox AB <info@swox.com>, |
| 4 | based on elf32-ppc.c by Ian Lance Taylor. |
| 5 | Largely rewritten by Alan Modra. |
| 6 | |
| 7 | This file is part of BFD, the Binary File Descriptor library. |
| 8 | |
| 9 | This program is free software; you can redistribute it and/or modify |
| 10 | it under the terms of the GNU General Public License as published by |
| 11 | the Free Software Foundation; either version 3 of the License, or |
| 12 | (at your option) any later version. |
| 13 | |
| 14 | This program is distributed in the hope that it will be useful, |
| 15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | GNU General Public License for more details. |
| 18 | |
| 19 | You should have received a copy of the GNU General Public License along |
| 20 | with this program; if not, write to the Free Software Foundation, Inc., |
| 21 | 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ |
| 22 | |
| 23 | |
| 24 | /* The 64-bit PowerPC ELF ABI may be found at |
| 25 | http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and |
| 26 | http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */ |
| 27 | |
| 28 | #include "sysdep.h" |
| 29 | #include <stdarg.h> |
| 30 | #include "bfd.h" |
| 31 | #include "bfdlink.h" |
| 32 | #include "libbfd.h" |
| 33 | #include "elf-bfd.h" |
| 34 | #include "elf/ppc64.h" |
| 35 | #include "elf64-ppc.h" |
| 36 | #include "dwarf2.h" |
| 37 | |
| 38 | /* All users of this file have bfd_octets_per_byte (abfd, sec) == 1. */ |
| 39 | #define OCTETS_PER_BYTE(ABFD, SEC) 1 |
| 40 | |
| 41 | static bfd_reloc_status_type ppc64_elf_ha_reloc |
| 42 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| 43 | static bfd_reloc_status_type ppc64_elf_branch_reloc |
| 44 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| 45 | static bfd_reloc_status_type ppc64_elf_brtaken_reloc |
| 46 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| 47 | static bfd_reloc_status_type ppc64_elf_sectoff_reloc |
| 48 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| 49 | static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc |
| 50 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| 51 | static bfd_reloc_status_type ppc64_elf_toc_reloc |
| 52 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| 53 | static bfd_reloc_status_type ppc64_elf_toc_ha_reloc |
| 54 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| 55 | static bfd_reloc_status_type ppc64_elf_toc64_reloc |
| 56 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| 57 | static bfd_reloc_status_type ppc64_elf_prefix_reloc |
| 58 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| 59 | static bfd_reloc_status_type ppc64_elf_unhandled_reloc |
| 60 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| 61 | static bfd_vma opd_entry_value |
| 62 | (asection *, bfd_vma, asection **, bfd_vma *, bfd_boolean); |
| 63 | |
| 64 | #define TARGET_LITTLE_SYM powerpc_elf64_le_vec |
| 65 | #define TARGET_LITTLE_NAME "elf64-powerpcle" |
| 66 | #define TARGET_BIG_SYM powerpc_elf64_vec |
| 67 | #define TARGET_BIG_NAME "elf64-powerpc" |
| 68 | #define ELF_ARCH bfd_arch_powerpc |
| 69 | #define ELF_TARGET_ID PPC64_ELF_DATA |
| 70 | #define ELF_MACHINE_CODE EM_PPC64 |
| 71 | #define ELF_MAXPAGESIZE 0x10000 |
| 72 | #define ELF_COMMONPAGESIZE 0x1000 |
| 73 | #define ELF_RELROPAGESIZE ELF_MAXPAGESIZE |
| 74 | #define elf_info_to_howto ppc64_elf_info_to_howto |
| 75 | |
| 76 | #define elf_backend_want_got_sym 0 |
| 77 | #define elf_backend_want_plt_sym 0 |
| 78 | #define elf_backend_plt_alignment 3 |
| 79 | #define elf_backend_plt_not_loaded 1 |
| 80 | #define elf_backend_got_header_size 8 |
| 81 | #define elf_backend_want_dynrelro 1 |
| 82 | #define elf_backend_can_gc_sections 1 |
| 83 | #define elf_backend_can_refcount 1 |
| 84 | #define elf_backend_rela_normal 1 |
| 85 | #define elf_backend_dtrel_excludes_plt 1 |
| 86 | #define elf_backend_default_execstack 0 |
| 87 | |
| 88 | #define bfd_elf64_mkobject ppc64_elf_mkobject |
| 89 | #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup |
| 90 | #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup |
| 91 | #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data |
| 92 | #define bfd_elf64_bfd_print_private_bfd_data ppc64_elf_print_private_bfd_data |
| 93 | #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook |
| 94 | #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create |
| 95 | #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab |
| 96 | #define bfd_elf64_bfd_link_just_syms ppc64_elf_link_just_syms |
| 97 | #define bfd_elf64_bfd_gc_sections ppc64_elf_gc_sections |
| 98 | |
| 99 | #define elf_backend_object_p ppc64_elf_object_p |
| 100 | #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus |
| 101 | #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo |
| 102 | #define elf_backend_write_core_note ppc64_elf_write_core_note |
| 103 | #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections |
| 104 | #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol |
| 105 | #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook |
| 106 | #define elf_backend_check_directives ppc64_elf_before_check_relocs |
| 107 | #define elf_backend_notice_as_needed ppc64_elf_notice_as_needed |
| 108 | #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup |
| 109 | #define elf_backend_check_relocs ppc64_elf_check_relocs |
| 110 | #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible |
| 111 | #define elf_backend_gc_keep ppc64_elf_gc_keep |
| 112 | #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref |
| 113 | #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook |
| 114 | #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol |
| 115 | #define elf_backend_hide_symbol ppc64_elf_hide_symbol |
| 116 | #define elf_backend_maybe_function_sym ppc64_elf_maybe_function_sym |
| 117 | #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust |
| 118 | #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections |
| 119 | #define elf_backend_hash_symbol ppc64_elf_hash_symbol |
| 120 | #define elf_backend_init_index_section _bfd_elf_init_2_index_sections |
| 121 | #define elf_backend_action_discarded ppc64_elf_action_discarded |
| 122 | #define elf_backend_relocate_section ppc64_elf_relocate_section |
| 123 | #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol |
| 124 | #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class |
| 125 | #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections |
| 126 | #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook |
| 127 | #define elf_backend_special_sections ppc64_elf_special_sections |
| 128 | #define elf_backend_section_flags ppc64_elf_section_flags |
| 129 | #define elf_backend_merge_symbol_attribute ppc64_elf_merge_symbol_attribute |
| 130 | #define elf_backend_merge_symbol ppc64_elf_merge_symbol |
| 131 | #define elf_backend_get_reloc_section bfd_get_section_by_name |
| 132 | |
| 133 | /* The name of the dynamic interpreter. This is put in the .interp |
| 134 | section. */ |
| 135 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" |
| 136 | |
| 137 | /* The size in bytes of an entry in the procedure linkage table. */ |
| 138 | #define PLT_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 8) |
| 139 | #define LOCAL_PLT_ENTRY_SIZE(htab) (htab->opd_abi ? 16 : 8) |
| 140 | |
| 141 | /* The initial size of the plt reserved for the dynamic linker. */ |
| 142 | #define PLT_INITIAL_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 16) |
| 143 | |
| 144 | /* Offsets to some stack save slots. */ |
| 145 | #define STK_LR 16 |
| 146 | #define STK_TOC(htab) (htab->opd_abi ? 40 : 24) |
| 147 | /* This one is dodgy. ELFv2 does not have a linker word, so use the |
| 148 | CR save slot. Used only by optimised __tls_get_addr call stub, |
| 149 | relying on __tls_get_addr_opt not saving CR.. */ |
| 150 | #define STK_LINKER(htab) (htab->opd_abi ? 32 : 8) |
| 151 | |
| 152 | /* TOC base pointers offset from start of TOC. */ |
| 153 | #define TOC_BASE_OFF 0x8000 |
| 154 | /* TOC base alignment. */ |
| 155 | #define TOC_BASE_ALIGN 256 |
| 156 | |
| 157 | /* Offset of tp and dtp pointers from start of TLS block. */ |
| 158 | #define TP_OFFSET 0x7000 |
| 159 | #define DTP_OFFSET 0x8000 |
| 160 | |
| 161 | /* .plt call stub instructions. The normal stub is like this, but |
| 162 | sometimes the .plt entry crosses a 64k boundary and we need to |
| 163 | insert an addi to adjust r11. */ |
| 164 | #define STD_R2_0R1 0xf8410000 /* std %r2,0+40(%r1) */ |
| 165 | #define ADDIS_R11_R2 0x3d620000 /* addis %r11,%r2,xxx@ha */ |
| 166 | #define LD_R12_0R11 0xe98b0000 /* ld %r12,xxx+0@l(%r11) */ |
| 167 | #define MTCTR_R12 0x7d8903a6 /* mtctr %r12 */ |
| 168 | #define LD_R2_0R11 0xe84b0000 /* ld %r2,xxx+8@l(%r11) */ |
| 169 | #define LD_R11_0R11 0xe96b0000 /* ld %r11,xxx+16@l(%r11) */ |
| 170 | #define BCTR 0x4e800420 /* bctr */ |
| 171 | |
| 172 | #define ADDI_R11_R11 0x396b0000 /* addi %r11,%r11,off@l */ |
| 173 | #define ADDI_R12_R11 0x398b0000 /* addi %r12,%r11,off@l */ |
| 174 | #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,off@l */ |
| 175 | #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */ |
| 176 | #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */ |
| 177 | |
| 178 | #define XOR_R2_R12_R12 0x7d826278 /* xor %r2,%r12,%r12 */ |
| 179 | #define ADD_R11_R11_R2 0x7d6b1214 /* add %r11,%r11,%r2 */ |
| 180 | #define XOR_R11_R12_R12 0x7d8b6278 /* xor %r11,%r12,%r12 */ |
| 181 | #define ADD_R2_R2_R11 0x7c425a14 /* add %r2,%r2,%r11 */ |
| 182 | #define CMPLDI_R2_0 0x28220000 /* cmpldi %r2,0 */ |
| 183 | #define BNECTR 0x4ca20420 /* bnectr+ */ |
| 184 | #define BNECTR_P4 0x4ce20420 /* bnectr+ */ |
| 185 | |
| 186 | #define LD_R12_0R2 0xe9820000 /* ld %r12,xxx+0(%r2) */ |
| 187 | #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */ |
| 188 | #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */ |
| 189 | |
| 190 | #define LD_R2_0R1 0xe8410000 /* ld %r2,0(%r1) */ |
| 191 | #define LD_R2_0R12 0xe84c0000 /* ld %r2,0(%r12) */ |
| 192 | #define ADD_R2_R2_R12 0x7c426214 /* add %r2,%r2,%r12 */ |
| 193 | |
| 194 | #define LI_R11_0 0x39600000 /* li %r11,0 */ |
| 195 | #define LIS_R2 0x3c400000 /* lis %r2,xxx@ha */ |
| 196 | #define LIS_R11 0x3d600000 /* lis %r11,xxx@ha */ |
| 197 | #define LIS_R12 0x3d800000 /* lis %r12,xxx@ha */ |
| 198 | #define ADDIS_R2_R12 0x3c4c0000 /* addis %r2,%r12,xxx@ha */ |
| 199 | #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */ |
| 200 | #define ADDIS_R12_R11 0x3d8b0000 /* addis %r12,%r11,xxx@ha */ |
| 201 | #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */ |
| 202 | #define ORIS_R12_R12_0 0x658c0000 /* oris %r12,%r12,xxx@hi */ |
| 203 | #define ORI_R11_R11_0 0x616b0000 /* ori %r11,%r11,xxx@l */ |
| 204 | #define ORI_R12_R12_0 0x618c0000 /* ori %r12,%r12,xxx@l */ |
| 205 | #define LD_R12_0R12 0xe98c0000 /* ld %r12,xxx@l(%r12) */ |
| 206 | #define SLDI_R11_R11_34 0x796b1746 /* sldi %r11,%r11,34 */ |
| 207 | #define SLDI_R12_R12_32 0x799c07c6 /* sldi %r12,%r12,32 */ |
| 208 | #define LDX_R12_R11_R12 0x7d8b602a /* ldx %r12,%r11,%r12 */ |
| 209 | #define ADD_R12_R11_R12 0x7d8b6214 /* add %r12,%r11,%r12 */ |
| 210 | #define PADDI_R12_PC 0x0610000039800000ULL |
| 211 | #define PLD_R12_PC 0x04100000e5800000ULL |
| 212 | #define PNOP 0x0700000000000000ULL |
| 213 | |
| 214 | /* __glink_PLTresolve stub instructions. We enter with the index in R0. */ |
| 215 | #define GLINK_PLTRESOLVE_SIZE(htab) \ |
| 216 | (8u + (htab->opd_abi ? 11 * 4 : 14 * 4)) |
| 217 | /* 0: */ |
| 218 | /* .quad plt0-1f */ |
| 219 | /* __glink: */ |
| 220 | #define MFLR_R12 0x7d8802a6 /* mflr %12 */ |
| 221 | #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */ |
| 222 | /* 1: */ |
| 223 | #define MFLR_R11 0x7d6802a6 /* mflr %11 */ |
| 224 | /* ld %2,(0b-1b)(%11) */ |
| 225 | #define MTLR_R12 0x7d8803a6 /* mtlr %12 */ |
| 226 | #define ADD_R11_R2_R11 0x7d625a14 /* add %11,%2,%11 */ |
| 227 | /* ld %12,0(%11) */ |
| 228 | /* ld %2,8(%11) */ |
| 229 | /* mtctr %12 */ |
| 230 | /* ld %11,16(%11) */ |
| 231 | /* bctr */ |
| 232 | #define MFLR_R0 0x7c0802a6 /* mflr %r0 */ |
| 233 | #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */ |
| 234 | #define SUB_R12_R12_R11 0x7d8b6050 /* subf %r12,%r11,%r12 */ |
| 235 | #define ADDI_R0_R12 0x380c0000 /* addi %r0,%r12,0 */ |
| 236 | #define SRDI_R0_R0_2 0x7800f082 /* rldicl %r0,%r0,62,2 */ |
| 237 | |
| 238 | /* Pad with this. */ |
| 239 | #define NOP 0x60000000 |
| 240 | |
| 241 | /* Some other nops. */ |
| 242 | #define CROR_151515 0x4def7b82 |
| 243 | #define CROR_313131 0x4ffffb82 |
| 244 | |
| 245 | /* .glink entries for the first 32k functions are two instructions. */ |
| 246 | #define LI_R0_0 0x38000000 /* li %r0,0 */ |
| 247 | #define B_DOT 0x48000000 /* b . */ |
| 248 | |
| 249 | /* After that, we need two instructions to load the index, followed by |
| 250 | a branch. */ |
| 251 | #define LIS_R0_0 0x3c000000 /* lis %r0,0 */ |
| 252 | #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */ |
| 253 | |
| 254 | /* Instructions used by the save and restore reg functions. */ |
| 255 | #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */ |
| 256 | #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */ |
| 257 | #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */ |
| 258 | #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */ |
| 259 | #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */ |
| 260 | #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */ |
| 261 | #define LI_R12_0 0x39800000 /* li %r12,0 */ |
| 262 | #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */ |
| 263 | #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */ |
| 264 | #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */ |
| 265 | #define BLR 0x4e800020 /* blr */ |
| 266 | |
| 267 | /* Since .opd is an array of descriptors and each entry will end up |
| 268 | with identical R_PPC64_RELATIVE relocs, there is really no need to |
| 269 | propagate .opd relocs; The dynamic linker should be taught to |
| 270 | relocate .opd without reloc entries. */ |
| 271 | #ifndef NO_OPD_RELOCS |
| 272 | #define NO_OPD_RELOCS 0 |
| 273 | #endif |
| 274 | |
| 275 | #ifndef ARRAY_SIZE |
| 276 | #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0])) |
| 277 | #endif |
| 278 | |
| 279 | static inline int |
| 280 | abiversion (bfd *abfd) |
| 281 | { |
| 282 | return elf_elfheader (abfd)->e_flags & EF_PPC64_ABI; |
| 283 | } |
| 284 | |
| 285 | static inline void |
| 286 | set_abiversion (bfd *abfd, int ver) |
| 287 | { |
| 288 | elf_elfheader (abfd)->e_flags &= ~EF_PPC64_ABI; |
| 289 | elf_elfheader (abfd)->e_flags |= ver & EF_PPC64_ABI; |
| 290 | } |
| 291 | \f |
| 292 | /* Relocation HOWTO's. */ |
| 293 | /* Like other ELF RELA targets that don't apply multiple |
| 294 | field-altering relocations to the same localation, src_mask is |
| 295 | always zero and pcrel_offset is the same as pc_relative. |
| 296 | PowerPC can always use a zero bitpos, even when the field is not at |
| 297 | the LSB. For example, a REL24 could use rightshift=2, bisize=24 |
| 298 | and bitpos=2 which matches the ABI description, or as we do here, |
| 299 | rightshift=0, bitsize=26 and bitpos=0. */ |
| 300 | #define HOW(type, size, bitsize, mask, rightshift, pc_relative, \ |
| 301 | complain, special_func) \ |
| 302 | HOWTO (type, rightshift, size, bitsize, pc_relative, 0, \ |
| 303 | complain_overflow_ ## complain, special_func, \ |
| 304 | #type, FALSE, 0, mask, pc_relative) |
| 305 | |
| 306 | static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max]; |
| 307 | |
| 308 | static reloc_howto_type ppc64_elf_howto_raw[] = |
| 309 | { |
| 310 | /* This reloc does nothing. */ |
| 311 | HOW (R_PPC64_NONE, 3, 0, 0, 0, FALSE, dont, |
| 312 | bfd_elf_generic_reloc), |
| 313 | |
| 314 | /* A standard 32 bit relocation. */ |
| 315 | HOW (R_PPC64_ADDR32, 2, 32, 0xffffffff, 0, FALSE, bitfield, |
| 316 | bfd_elf_generic_reloc), |
| 317 | |
| 318 | /* An absolute 26 bit branch; the lower two bits must be zero. |
| 319 | FIXME: we don't check that, we just clear them. */ |
| 320 | HOW (R_PPC64_ADDR24, 2, 26, 0x03fffffc, 0, FALSE, bitfield, |
| 321 | bfd_elf_generic_reloc), |
| 322 | |
| 323 | /* A standard 16 bit relocation. */ |
| 324 | HOW (R_PPC64_ADDR16, 1, 16, 0xffff, 0, FALSE, bitfield, |
| 325 | bfd_elf_generic_reloc), |
| 326 | |
| 327 | /* A 16 bit relocation without overflow. */ |
| 328 | HOW (R_PPC64_ADDR16_LO, 1, 16, 0xffff, 0, FALSE, dont, |
| 329 | bfd_elf_generic_reloc), |
| 330 | |
| 331 | /* Bits 16-31 of an address. */ |
| 332 | HOW (R_PPC64_ADDR16_HI, 1, 16, 0xffff, 16, FALSE, signed, |
| 333 | bfd_elf_generic_reloc), |
| 334 | |
| 335 | /* Bits 16-31 of an address, plus 1 if the contents of the low 16 |
| 336 | bits, treated as a signed number, is negative. */ |
| 337 | HOW (R_PPC64_ADDR16_HA, 1, 16, 0xffff, 16, FALSE, signed, |
| 338 | ppc64_elf_ha_reloc), |
| 339 | |
| 340 | /* An absolute 16 bit branch; the lower two bits must be zero. |
| 341 | FIXME: we don't check that, we just clear them. */ |
| 342 | HOW (R_PPC64_ADDR14, 2, 16, 0x0000fffc, 0, FALSE, signed, |
| 343 | ppc64_elf_branch_reloc), |
| 344 | |
| 345 | /* An absolute 16 bit branch, for which bit 10 should be set to |
| 346 | indicate that the branch is expected to be taken. The lower two |
| 347 | bits must be zero. */ |
| 348 | HOW (R_PPC64_ADDR14_BRTAKEN, 2, 16, 0x0000fffc, 0, FALSE, signed, |
| 349 | ppc64_elf_brtaken_reloc), |
| 350 | |
| 351 | /* An absolute 16 bit branch, for which bit 10 should be set to |
| 352 | indicate that the branch is not expected to be taken. The lower |
| 353 | two bits must be zero. */ |
| 354 | HOW (R_PPC64_ADDR14_BRNTAKEN, 2, 16, 0x0000fffc, 0, FALSE, signed, |
| 355 | ppc64_elf_brtaken_reloc), |
| 356 | |
| 357 | /* A relative 26 bit branch; the lower two bits must be zero. */ |
| 358 | HOW (R_PPC64_REL24, 2, 26, 0x03fffffc, 0, TRUE, signed, |
| 359 | ppc64_elf_branch_reloc), |
| 360 | |
| 361 | /* A variant of R_PPC64_REL24, used when r2 is not the toc pointer. */ |
| 362 | HOW (R_PPC64_REL24_NOTOC, 2, 26, 0x03fffffc, 0, TRUE, signed, |
| 363 | ppc64_elf_branch_reloc), |
| 364 | |
| 365 | /* A relative 16 bit branch; the lower two bits must be zero. */ |
| 366 | HOW (R_PPC64_REL14, 2, 16, 0x0000fffc, 0, TRUE, signed, |
| 367 | ppc64_elf_branch_reloc), |
| 368 | |
| 369 | /* A relative 16 bit branch. Bit 10 should be set to indicate that |
| 370 | the branch is expected to be taken. The lower two bits must be |
| 371 | zero. */ |
| 372 | HOW (R_PPC64_REL14_BRTAKEN, 2, 16, 0x0000fffc, 0, TRUE, signed, |
| 373 | ppc64_elf_brtaken_reloc), |
| 374 | |
| 375 | /* A relative 16 bit branch. Bit 10 should be set to indicate that |
| 376 | the branch is not expected to be taken. The lower two bits must |
| 377 | be zero. */ |
| 378 | HOW (R_PPC64_REL14_BRNTAKEN, 2, 16, 0x0000fffc, 0, TRUE, signed, |
| 379 | ppc64_elf_brtaken_reloc), |
| 380 | |
| 381 | /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the |
| 382 | symbol. */ |
| 383 | HOW (R_PPC64_GOT16, 1, 16, 0xffff, 0, FALSE, signed, |
| 384 | ppc64_elf_unhandled_reloc), |
| 385 | |
| 386 | /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for |
| 387 | the symbol. */ |
| 388 | HOW (R_PPC64_GOT16_LO, 1, 16, 0xffff, 0, FALSE, dont, |
| 389 | ppc64_elf_unhandled_reloc), |
| 390 | |
| 391 | /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for |
| 392 | the symbol. */ |
| 393 | HOW (R_PPC64_GOT16_HI, 1, 16, 0xffff, 16, FALSE, signed, |
| 394 | ppc64_elf_unhandled_reloc), |
| 395 | |
| 396 | /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for |
| 397 | the symbol. */ |
| 398 | HOW (R_PPC64_GOT16_HA, 1, 16, 0xffff, 16, FALSE, signed, |
| 399 | ppc64_elf_unhandled_reloc), |
| 400 | |
| 401 | /* This is used only by the dynamic linker. The symbol should exist |
| 402 | both in the object being run and in some shared library. The |
| 403 | dynamic linker copies the data addressed by the symbol from the |
| 404 | shared library into the object, because the object being |
| 405 | run has to have the data at some particular address. */ |
| 406 | HOW (R_PPC64_COPY, 0, 0, 0, 0, FALSE, dont, |
| 407 | ppc64_elf_unhandled_reloc), |
| 408 | |
| 409 | /* Like R_PPC64_ADDR64, but used when setting global offset table |
| 410 | entries. */ |
| 411 | HOW (R_PPC64_GLOB_DAT, 4, 64, 0xffffffffffffffffULL, 0, FALSE, dont, |
| 412 | ppc64_elf_unhandled_reloc), |
| 413 | |
| 414 | /* Created by the link editor. Marks a procedure linkage table |
| 415 | entry for a symbol. */ |
| 416 | HOW (R_PPC64_JMP_SLOT, 0, 0, 0, 0, FALSE, dont, |
| 417 | ppc64_elf_unhandled_reloc), |
| 418 | |
| 419 | /* Used only by the dynamic linker. When the object is run, this |
| 420 | doubleword64 is set to the load address of the object, plus the |
| 421 | addend. */ |
| 422 | HOW (R_PPC64_RELATIVE, 4, 64, 0xffffffffffffffffULL, 0, FALSE, dont, |
| 423 | bfd_elf_generic_reloc), |
| 424 | |
| 425 | /* Like R_PPC64_ADDR32, but may be unaligned. */ |
| 426 | HOW (R_PPC64_UADDR32, 2, 32, 0xffffffff, 0, FALSE, bitfield, |
| 427 | bfd_elf_generic_reloc), |
| 428 | |
| 429 | /* Like R_PPC64_ADDR16, but may be unaligned. */ |
| 430 | HOW (R_PPC64_UADDR16, 1, 16, 0xffff, 0, FALSE, bitfield, |
| 431 | bfd_elf_generic_reloc), |
| 432 | |
| 433 | /* 32-bit PC relative. */ |
| 434 | HOW (R_PPC64_REL32, 2, 32, 0xffffffff, 0, TRUE, signed, |
| 435 | bfd_elf_generic_reloc), |
| 436 | |
| 437 | /* 32-bit relocation to the symbol's procedure linkage table. */ |
| 438 | HOW (R_PPC64_PLT32, 2, 32, 0xffffffff, 0, FALSE, bitfield, |
| 439 | ppc64_elf_unhandled_reloc), |
| 440 | |
| 441 | /* 32-bit PC relative relocation to the symbol's procedure linkage table. |
| 442 | FIXME: R_PPC64_PLTREL32 not supported. */ |
| 443 | HOW (R_PPC64_PLTREL32, 2, 32, 0xffffffff, 0, TRUE, signed, |
| 444 | ppc64_elf_unhandled_reloc), |
| 445 | |
| 446 | /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for |
| 447 | the symbol. */ |
| 448 | HOW (R_PPC64_PLT16_LO, 1, 16, 0xffff, 0, FALSE, dont, |
| 449 | ppc64_elf_unhandled_reloc), |
| 450 | |
| 451 | /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for |
| 452 | the symbol. */ |
| 453 | HOW (R_PPC64_PLT16_HI, 1, 16, 0xffff, 16, FALSE, signed, |
| 454 | ppc64_elf_unhandled_reloc), |
| 455 | |
| 456 | /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for |
| 457 | the symbol. */ |
| 458 | HOW (R_PPC64_PLT16_HA, 1, 16, 0xffff, 16, FALSE, signed, |
| 459 | ppc64_elf_unhandled_reloc), |
| 460 | |
| 461 | /* 16-bit section relative relocation. */ |
| 462 | HOW (R_PPC64_SECTOFF, 1, 16, 0xffff, 0, FALSE, signed, |
| 463 | ppc64_elf_sectoff_reloc), |
| 464 | |
| 465 | /* Like R_PPC64_SECTOFF, but no overflow warning. */ |
| 466 | HOW (R_PPC64_SECTOFF_LO, 1, 16, 0xffff, 0, FALSE, dont, |
| 467 | ppc64_elf_sectoff_reloc), |
| 468 | |
| 469 | /* 16-bit upper half section relative relocation. */ |
| 470 | HOW (R_PPC64_SECTOFF_HI, 1, 16, 0xffff, 16, FALSE, signed, |
| 471 | ppc64_elf_sectoff_reloc), |
| 472 | |
| 473 | /* 16-bit upper half adjusted section relative relocation. */ |
| 474 | HOW (R_PPC64_SECTOFF_HA, 1, 16, 0xffff, 16, FALSE, signed, |
| 475 | ppc64_elf_sectoff_ha_reloc), |
| 476 | |
| 477 | /* Like R_PPC64_REL24 without touching the two least significant bits. */ |
| 478 | HOW (R_PPC64_REL30, 2, 30, 0xfffffffc, 2, TRUE, dont, |
| 479 | bfd_elf_generic_reloc), |
| 480 | |
| 481 | /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */ |
| 482 | |
| 483 | /* A standard 64-bit relocation. */ |
| 484 | HOW (R_PPC64_ADDR64, 4, 64, 0xffffffffffffffffULL, 0, FALSE, dont, |
| 485 | bfd_elf_generic_reloc), |
| 486 | |
| 487 | /* The bits 32-47 of an address. */ |
| 488 | HOW (R_PPC64_ADDR16_HIGHER, 1, 16, 0xffff, 32, FALSE, dont, |
| 489 | bfd_elf_generic_reloc), |
| 490 | |
| 491 | /* The bits 32-47 of an address, plus 1 if the contents of the low |
| 492 | 16 bits, treated as a signed number, is negative. */ |
| 493 | HOW (R_PPC64_ADDR16_HIGHERA, 1, 16, 0xffff, 32, FALSE, dont, |
| 494 | ppc64_elf_ha_reloc), |
| 495 | |
| 496 | /* The bits 48-63 of an address. */ |
| 497 | HOW (R_PPC64_ADDR16_HIGHEST, 1, 16, 0xffff, 48, FALSE, dont, |
| 498 | bfd_elf_generic_reloc), |
| 499 | |
| 500 | /* The bits 48-63 of an address, plus 1 if the contents of the low |
| 501 | 16 bits, treated as a signed number, is negative. */ |
| 502 | HOW (R_PPC64_ADDR16_HIGHESTA, 1, 16, 0xffff, 48, FALSE, dont, |
| 503 | ppc64_elf_ha_reloc), |
| 504 | |
| 505 | /* Like ADDR64, but may be unaligned. */ |
| 506 | HOW (R_PPC64_UADDR64, 4, 64, 0xffffffffffffffffULL, 0, FALSE, dont, |
| 507 | bfd_elf_generic_reloc), |
| 508 | |
| 509 | /* 64-bit relative relocation. */ |
| 510 | HOW (R_PPC64_REL64, 4, 64, 0xffffffffffffffffULL, 0, TRUE, dont, |
| 511 | bfd_elf_generic_reloc), |
| 512 | |
| 513 | /* 64-bit relocation to the symbol's procedure linkage table. */ |
| 514 | HOW (R_PPC64_PLT64, 4, 64, 0xffffffffffffffffULL, 0, FALSE, dont, |
| 515 | ppc64_elf_unhandled_reloc), |
| 516 | |
| 517 | /* 64-bit PC relative relocation to the symbol's procedure linkage |
| 518 | table. */ |
| 519 | /* FIXME: R_PPC64_PLTREL64 not supported. */ |
| 520 | HOW (R_PPC64_PLTREL64, 4, 64, 0xffffffffffffffffULL, 0, TRUE, dont, |
| 521 | ppc64_elf_unhandled_reloc), |
| 522 | |
| 523 | /* 16 bit TOC-relative relocation. */ |
| 524 | /* R_PPC64_TOC16 47 half16* S + A - .TOC. */ |
| 525 | HOW (R_PPC64_TOC16, 1, 16, 0xffff, 0, FALSE, signed, |
| 526 | ppc64_elf_toc_reloc), |
| 527 | |
| 528 | /* 16 bit TOC-relative relocation without overflow. */ |
| 529 | /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */ |
| 530 | HOW (R_PPC64_TOC16_LO, 1, 16, 0xffff, 0, FALSE, dont, |
| 531 | ppc64_elf_toc_reloc), |
| 532 | |
| 533 | /* 16 bit TOC-relative relocation, high 16 bits. */ |
| 534 | /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */ |
| 535 | HOW (R_PPC64_TOC16_HI, 1, 16, 0xffff, 16, FALSE, signed, |
| 536 | ppc64_elf_toc_reloc), |
| 537 | |
| 538 | /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the |
| 539 | contents of the low 16 bits, treated as a signed number, is |
| 540 | negative. */ |
| 541 | /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */ |
| 542 | HOW (R_PPC64_TOC16_HA, 1, 16, 0xffff, 16, FALSE, signed, |
| 543 | ppc64_elf_toc_ha_reloc), |
| 544 | |
| 545 | /* 64-bit relocation; insert value of TOC base (.TOC.). */ |
| 546 | /* R_PPC64_TOC 51 doubleword64 .TOC. */ |
| 547 | HOW (R_PPC64_TOC, 4, 64, 0xffffffffffffffffULL, 0, FALSE, dont, |
| 548 | ppc64_elf_toc64_reloc), |
| 549 | |
| 550 | /* Like R_PPC64_GOT16, but also informs the link editor that the |
| 551 | value to relocate may (!) refer to a PLT entry which the link |
| 552 | editor (a) may replace with the symbol value. If the link editor |
| 553 | is unable to fully resolve the symbol, it may (b) create a PLT |
| 554 | entry and store the address to the new PLT entry in the GOT. |
| 555 | This permits lazy resolution of function symbols at run time. |
| 556 | The link editor may also skip all of this and just (c) emit a |
| 557 | R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */ |
| 558 | /* FIXME: R_PPC64_PLTGOT16 not implemented. */ |
| 559 | HOW (R_PPC64_PLTGOT16, 1, 16, 0xffff, 0, FALSE,signed, |
| 560 | ppc64_elf_unhandled_reloc), |
| 561 | |
| 562 | /* Like R_PPC64_PLTGOT16, but without overflow. */ |
| 563 | /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */ |
| 564 | HOW (R_PPC64_PLTGOT16_LO, 1, 16, 0xffff, 0, FALSE, dont, |
| 565 | ppc64_elf_unhandled_reloc), |
| 566 | |
| 567 | /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */ |
| 568 | /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */ |
| 569 | HOW (R_PPC64_PLTGOT16_HI, 1, 16, 0xffff, 16, FALSE, signed, |
| 570 | ppc64_elf_unhandled_reloc), |
| 571 | |
| 572 | /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus |
| 573 | 1 if the contents of the low 16 bits, treated as a signed number, |
| 574 | is negative. */ |
| 575 | /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */ |
| 576 | HOW (R_PPC64_PLTGOT16_HA, 1, 16, 0xffff, 16, FALSE, signed, |
| 577 | ppc64_elf_unhandled_reloc), |
| 578 | |
| 579 | /* Like R_PPC64_ADDR16, but for instructions with a DS field. */ |
| 580 | HOW (R_PPC64_ADDR16_DS, 1, 16, 0xfffc, 0, FALSE, signed, |
| 581 | bfd_elf_generic_reloc), |
| 582 | |
| 583 | /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */ |
| 584 | HOW (R_PPC64_ADDR16_LO_DS, 1, 16, 0xfffc, 0, FALSE, dont, |
| 585 | bfd_elf_generic_reloc), |
| 586 | |
| 587 | /* Like R_PPC64_GOT16, but for instructions with a DS field. */ |
| 588 | HOW (R_PPC64_GOT16_DS, 1, 16, 0xfffc, 0, FALSE, signed, |
| 589 | ppc64_elf_unhandled_reloc), |
| 590 | |
| 591 | /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */ |
| 592 | HOW (R_PPC64_GOT16_LO_DS, 1, 16, 0xfffc, 0, FALSE, dont, |
| 593 | ppc64_elf_unhandled_reloc), |
| 594 | |
| 595 | /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */ |
| 596 | HOW (R_PPC64_PLT16_LO_DS, 1, 16, 0xfffc, 0, FALSE, dont, |
| 597 | ppc64_elf_unhandled_reloc), |
| 598 | |
| 599 | /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */ |
| 600 | HOW (R_PPC64_SECTOFF_DS, 1, 16, 0xfffc, 0, FALSE, signed, |
| 601 | ppc64_elf_sectoff_reloc), |
| 602 | |
| 603 | /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */ |
| 604 | HOW (R_PPC64_SECTOFF_LO_DS, 1, 16, 0xfffc, 0, FALSE, dont, |
| 605 | ppc64_elf_sectoff_reloc), |
| 606 | |
| 607 | /* Like R_PPC64_TOC16, but for instructions with a DS field. */ |
| 608 | HOW (R_PPC64_TOC16_DS, 1, 16, 0xfffc, 0, FALSE, signed, |
| 609 | ppc64_elf_toc_reloc), |
| 610 | |
| 611 | /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */ |
| 612 | HOW (R_PPC64_TOC16_LO_DS, 1, 16, 0xfffc, 0, FALSE, dont, |
| 613 | ppc64_elf_toc_reloc), |
| 614 | |
| 615 | /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */ |
| 616 | /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */ |
| 617 | HOW (R_PPC64_PLTGOT16_DS, 1, 16, 0xfffc, 0, FALSE, signed, |
| 618 | ppc64_elf_unhandled_reloc), |
| 619 | |
| 620 | /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */ |
| 621 | /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */ |
| 622 | HOW (R_PPC64_PLTGOT16_LO_DS, 1, 16, 0xfffc, 0, FALSE, dont, |
| 623 | ppc64_elf_unhandled_reloc), |
| 624 | |
| 625 | /* Marker relocs for TLS. */ |
| 626 | HOW (R_PPC64_TLS, 2, 32, 0, 0, FALSE, dont, |
| 627 | bfd_elf_generic_reloc), |
| 628 | |
| 629 | HOW (R_PPC64_TLSGD, 2, 32, 0, 0, FALSE, dont, |
| 630 | bfd_elf_generic_reloc), |
| 631 | |
| 632 | HOW (R_PPC64_TLSLD, 2, 32, 0, 0, FALSE, dont, |
| 633 | bfd_elf_generic_reloc), |
| 634 | |
| 635 | /* Marker reloc for optimizing r2 save in prologue rather than on |
| 636 | each plt call stub. */ |
| 637 | HOW (R_PPC64_TOCSAVE, 2, 32, 0, 0, FALSE, dont, |
| 638 | bfd_elf_generic_reloc), |
| 639 | |
| 640 | /* Marker relocs on inline plt call instructions. */ |
| 641 | HOW (R_PPC64_PLTSEQ, 2, 32, 0, 0, FALSE, dont, |
| 642 | bfd_elf_generic_reloc), |
| 643 | |
| 644 | HOW (R_PPC64_PLTCALL, 2, 32, 0, 0, FALSE, dont, |
| 645 | bfd_elf_generic_reloc), |
| 646 | |
| 647 | /* Computes the load module index of the load module that contains the |
| 648 | definition of its TLS sym. */ |
| 649 | HOW (R_PPC64_DTPMOD64, 4, 64, 0xffffffffffffffffULL, 0, FALSE, dont, |
| 650 | ppc64_elf_unhandled_reloc), |
| 651 | |
| 652 | /* Computes a dtv-relative displacement, the difference between the value |
| 653 | of sym+add and the base address of the thread-local storage block that |
| 654 | contains the definition of sym, minus 0x8000. */ |
| 655 | HOW (R_PPC64_DTPREL64, 4, 64, 0xffffffffffffffffULL, 0, FALSE, dont, |
| 656 | ppc64_elf_unhandled_reloc), |
| 657 | |
| 658 | /* A 16 bit dtprel reloc. */ |
| 659 | HOW (R_PPC64_DTPREL16, 1, 16, 0xffff, 0, FALSE, signed, |
| 660 | ppc64_elf_unhandled_reloc), |
| 661 | |
| 662 | /* Like DTPREL16, but no overflow. */ |
| 663 | HOW (R_PPC64_DTPREL16_LO, 1, 16, 0xffff, 0, FALSE, dont, |
| 664 | ppc64_elf_unhandled_reloc), |
| 665 | |
| 666 | /* Like DTPREL16_LO, but next higher group of 16 bits. */ |
| 667 | HOW (R_PPC64_DTPREL16_HI, 1, 16, 0xffff, 16, FALSE, signed, |
| 668 | ppc64_elf_unhandled_reloc), |
| 669 | |
| 670 | /* Like DTPREL16_HI, but adjust for low 16 bits. */ |
| 671 | HOW (R_PPC64_DTPREL16_HA, 1, 16, 0xffff, 16, FALSE, signed, |
| 672 | ppc64_elf_unhandled_reloc), |
| 673 | |
| 674 | /* Like DTPREL16_HI, but next higher group of 16 bits. */ |
| 675 | HOW (R_PPC64_DTPREL16_HIGHER, 1, 16, 0xffff, 32, FALSE, dont, |
| 676 | ppc64_elf_unhandled_reloc), |
| 677 | |
| 678 | /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */ |
| 679 | HOW (R_PPC64_DTPREL16_HIGHERA, 1, 16, 0xffff, 32, FALSE, dont, |
| 680 | ppc64_elf_unhandled_reloc), |
| 681 | |
| 682 | /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */ |
| 683 | HOW (R_PPC64_DTPREL16_HIGHEST, 1, 16, 0xffff, 48, FALSE, dont, |
| 684 | ppc64_elf_unhandled_reloc), |
| 685 | |
| 686 | /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */ |
| 687 | HOW (R_PPC64_DTPREL16_HIGHESTA, 1, 16, 0xffff, 48, FALSE, dont, |
| 688 | ppc64_elf_unhandled_reloc), |
| 689 | |
| 690 | /* Like DTPREL16, but for insns with a DS field. */ |
| 691 | HOW (R_PPC64_DTPREL16_DS, 1, 16, 0xfffc, 0, FALSE, signed, |
| 692 | ppc64_elf_unhandled_reloc), |
| 693 | |
| 694 | /* Like DTPREL16_DS, but no overflow. */ |
| 695 | HOW (R_PPC64_DTPREL16_LO_DS, 1, 16, 0xfffc, 0, FALSE, dont, |
| 696 | ppc64_elf_unhandled_reloc), |
| 697 | |
| 698 | /* Computes a tp-relative displacement, the difference between the value of |
| 699 | sym+add and the value of the thread pointer (r13). */ |
| 700 | HOW (R_PPC64_TPREL64, 4, 64, 0xffffffffffffffffULL, 0, FALSE, dont, |
| 701 | ppc64_elf_unhandled_reloc), |
| 702 | |
| 703 | /* A 16 bit tprel reloc. */ |
| 704 | HOW (R_PPC64_TPREL16, 1, 16, 0xffff, 0, FALSE, signed, |
| 705 | ppc64_elf_unhandled_reloc), |
| 706 | |
| 707 | /* Like TPREL16, but no overflow. */ |
| 708 | HOW (R_PPC64_TPREL16_LO, 1, 16, 0xffff, 0, FALSE, dont, |
| 709 | ppc64_elf_unhandled_reloc), |
| 710 | |
| 711 | /* Like TPREL16_LO, but next higher group of 16 bits. */ |
| 712 | HOW (R_PPC64_TPREL16_HI, 1, 16, 0xffff, 16, FALSE, signed, |
| 713 | ppc64_elf_unhandled_reloc), |
| 714 | |
| 715 | /* Like TPREL16_HI, but adjust for low 16 bits. */ |
| 716 | HOW (R_PPC64_TPREL16_HA, 1, 16, 0xffff, 16, FALSE, signed, |
| 717 | ppc64_elf_unhandled_reloc), |
| 718 | |
| 719 | /* Like TPREL16_HI, but next higher group of 16 bits. */ |
| 720 | HOW (R_PPC64_TPREL16_HIGHER, 1, 16, 0xffff, 32, FALSE, dont, |
| 721 | ppc64_elf_unhandled_reloc), |
| 722 | |
| 723 | /* Like TPREL16_HIGHER, but adjust for low 16 bits. */ |
| 724 | HOW (R_PPC64_TPREL16_HIGHERA, 1, 16, 0xffff, 32, FALSE, dont, |
| 725 | ppc64_elf_unhandled_reloc), |
| 726 | |
| 727 | /* Like TPREL16_HIGHER, but next higher group of 16 bits. */ |
| 728 | HOW (R_PPC64_TPREL16_HIGHEST, 1, 16, 0xffff, 48, FALSE, dont, |
| 729 | ppc64_elf_unhandled_reloc), |
| 730 | |
| 731 | /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */ |
| 732 | HOW (R_PPC64_TPREL16_HIGHESTA, 1, 16, 0xffff, 48, FALSE, dont, |
| 733 | ppc64_elf_unhandled_reloc), |
| 734 | |
| 735 | /* Like TPREL16, but for insns with a DS field. */ |
| 736 | HOW (R_PPC64_TPREL16_DS, 1, 16, 0xfffc, 0, FALSE, signed, |
| 737 | ppc64_elf_unhandled_reloc), |
| 738 | |
| 739 | /* Like TPREL16_DS, but no overflow. */ |
| 740 | HOW (R_PPC64_TPREL16_LO_DS, 1, 16, 0xfffc, 0, FALSE, dont, |
| 741 | ppc64_elf_unhandled_reloc), |
| 742 | |
| 743 | /* Allocates two contiguous entries in the GOT to hold a tls_index structure, |
| 744 | with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset |
| 745 | to the first entry relative to the TOC base (r2). */ |
| 746 | HOW (R_PPC64_GOT_TLSGD16, 1, 16, 0xffff, 0, FALSE, signed, |
| 747 | ppc64_elf_unhandled_reloc), |
| 748 | |
| 749 | /* Like GOT_TLSGD16, but no overflow. */ |
| 750 | HOW (R_PPC64_GOT_TLSGD16_LO, 1, 16, 0xffff, 0, FALSE, dont, |
| 751 | ppc64_elf_unhandled_reloc), |
| 752 | |
| 753 | /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */ |
| 754 | HOW (R_PPC64_GOT_TLSGD16_HI, 1, 16, 0xffff, 16, FALSE, signed, |
| 755 | ppc64_elf_unhandled_reloc), |
| 756 | |
| 757 | /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */ |
| 758 | HOW (R_PPC64_GOT_TLSGD16_HA, 1, 16, 0xffff, 16, FALSE, signed, |
| 759 | ppc64_elf_unhandled_reloc), |
| 760 | |
| 761 | /* Allocates two contiguous entries in the GOT to hold a tls_index structure, |
| 762 | with values (sym+add)@dtpmod and zero, and computes the offset to the |
| 763 | first entry relative to the TOC base (r2). */ |
| 764 | HOW (R_PPC64_GOT_TLSLD16, 1, 16, 0xffff, 0, FALSE, signed, |
| 765 | ppc64_elf_unhandled_reloc), |
| 766 | |
| 767 | /* Like GOT_TLSLD16, but no overflow. */ |
| 768 | HOW (R_PPC64_GOT_TLSLD16_LO, 1, 16, 0xffff, 0, FALSE, dont, |
| 769 | ppc64_elf_unhandled_reloc), |
| 770 | |
| 771 | /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */ |
| 772 | HOW (R_PPC64_GOT_TLSLD16_HI, 1, 16, 0xffff, 16, FALSE, signed, |
| 773 | ppc64_elf_unhandled_reloc), |
| 774 | |
| 775 | /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */ |
| 776 | HOW (R_PPC64_GOT_TLSLD16_HA, 1, 16, 0xffff, 16, FALSE, signed, |
| 777 | ppc64_elf_unhandled_reloc), |
| 778 | |
| 779 | /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes |
| 780 | the offset to the entry relative to the TOC base (r2). */ |
| 781 | HOW (R_PPC64_GOT_DTPREL16_DS, 1, 16, 0xfffc, 0, FALSE, signed, |
| 782 | ppc64_elf_unhandled_reloc), |
| 783 | |
| 784 | /* Like GOT_DTPREL16_DS, but no overflow. */ |
| 785 | HOW (R_PPC64_GOT_DTPREL16_LO_DS, 1, 16, 0xfffc, 0, FALSE, dont, |
| 786 | ppc64_elf_unhandled_reloc), |
| 787 | |
| 788 | /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */ |
| 789 | HOW (R_PPC64_GOT_DTPREL16_HI, 1, 16, 0xffff, 16, FALSE, signed, |
| 790 | ppc64_elf_unhandled_reloc), |
| 791 | |
| 792 | /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */ |
| 793 | HOW (R_PPC64_GOT_DTPREL16_HA, 1, 16, 0xffff, 16, FALSE, signed, |
| 794 | ppc64_elf_unhandled_reloc), |
| 795 | |
| 796 | /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the |
| 797 | offset to the entry relative to the TOC base (r2). */ |
| 798 | HOW (R_PPC64_GOT_TPREL16_DS, 1, 16, 0xfffc, 0, FALSE, signed, |
| 799 | ppc64_elf_unhandled_reloc), |
| 800 | |
| 801 | /* Like GOT_TPREL16_DS, but no overflow. */ |
| 802 | HOW (R_PPC64_GOT_TPREL16_LO_DS, 1, 16, 0xfffc, 0, FALSE, dont, |
| 803 | ppc64_elf_unhandled_reloc), |
| 804 | |
| 805 | /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */ |
| 806 | HOW (R_PPC64_GOT_TPREL16_HI, 1, 16, 0xffff, 16, FALSE, signed, |
| 807 | ppc64_elf_unhandled_reloc), |
| 808 | |
| 809 | /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */ |
| 810 | HOW (R_PPC64_GOT_TPREL16_HA, 1, 16, 0xffff, 16, FALSE, signed, |
| 811 | ppc64_elf_unhandled_reloc), |
| 812 | |
| 813 | HOW (R_PPC64_JMP_IREL, 0, 0, 0, 0, FALSE, dont, |
| 814 | ppc64_elf_unhandled_reloc), |
| 815 | |
| 816 | HOW (R_PPC64_IRELATIVE, 4, 64, 0xffffffffffffffffULL, 0, FALSE, dont, |
| 817 | bfd_elf_generic_reloc), |
| 818 | |
| 819 | /* A 16 bit relative relocation. */ |
| 820 | HOW (R_PPC64_REL16, 1, 16, 0xffff, 0, TRUE, signed, |
| 821 | bfd_elf_generic_reloc), |
| 822 | |
| 823 | /* A 16 bit relative relocation without overflow. */ |
| 824 | HOW (R_PPC64_REL16_LO, 1, 16, 0xffff, 0, TRUE, dont, |
| 825 | bfd_elf_generic_reloc), |
| 826 | |
| 827 | /* The high order 16 bits of a relative address. */ |
| 828 | HOW (R_PPC64_REL16_HI, 1, 16, 0xffff, 16, TRUE, signed, |
| 829 | bfd_elf_generic_reloc), |
| 830 | |
| 831 | /* The high order 16 bits of a relative address, plus 1 if the contents of |
| 832 | the low 16 bits, treated as a signed number, is negative. */ |
| 833 | HOW (R_PPC64_REL16_HA, 1, 16, 0xffff, 16, TRUE, signed, |
| 834 | ppc64_elf_ha_reloc), |
| 835 | |
| 836 | HOW (R_PPC64_REL16_HIGH, 1, 16, 0xffff, 16, TRUE, dont, |
| 837 | bfd_elf_generic_reloc), |
| 838 | |
| 839 | HOW (R_PPC64_REL16_HIGHA, 1, 16, 0xffff, 16, TRUE, dont, |
| 840 | ppc64_elf_ha_reloc), |
| 841 | |
| 842 | HOW (R_PPC64_REL16_HIGHER, 1, 16, 0xffff, 32, TRUE, dont, |
| 843 | bfd_elf_generic_reloc), |
| 844 | |
| 845 | HOW (R_PPC64_REL16_HIGHERA, 1, 16, 0xffff, 32, TRUE, dont, |
| 846 | ppc64_elf_ha_reloc), |
| 847 | |
| 848 | HOW (R_PPC64_REL16_HIGHEST, 1, 16, 0xffff, 48, TRUE, dont, |
| 849 | bfd_elf_generic_reloc), |
| 850 | |
| 851 | HOW (R_PPC64_REL16_HIGHESTA, 1, 16, 0xffff, 48, TRUE, dont, |
| 852 | ppc64_elf_ha_reloc), |
| 853 | |
| 854 | /* Like R_PPC64_REL16_HA but for split field in addpcis. */ |
| 855 | HOW (R_PPC64_REL16DX_HA, 2, 16, 0x1fffc1, 16, TRUE, signed, |
| 856 | ppc64_elf_ha_reloc), |
| 857 | |
| 858 | /* A split-field reloc for addpcis, non-relative (gas internal use only). */ |
| 859 | HOW (R_PPC64_16DX_HA, 2, 16, 0x1fffc1, 16, FALSE, signed, |
| 860 | ppc64_elf_ha_reloc), |
| 861 | |
| 862 | /* Like R_PPC64_ADDR16_HI, but no overflow. */ |
| 863 | HOW (R_PPC64_ADDR16_HIGH, 1, 16, 0xffff, 16, FALSE, dont, |
| 864 | bfd_elf_generic_reloc), |
| 865 | |
| 866 | /* Like R_PPC64_ADDR16_HA, but no overflow. */ |
| 867 | HOW (R_PPC64_ADDR16_HIGHA, 1, 16, 0xffff, 16, FALSE, dont, |
| 868 | ppc64_elf_ha_reloc), |
| 869 | |
| 870 | /* Like R_PPC64_DTPREL16_HI, but no overflow. */ |
| 871 | HOW (R_PPC64_DTPREL16_HIGH, 1, 16, 0xffff, 16, FALSE, dont, |
| 872 | ppc64_elf_unhandled_reloc), |
| 873 | |
| 874 | /* Like R_PPC64_DTPREL16_HA, but no overflow. */ |
| 875 | HOW (R_PPC64_DTPREL16_HIGHA, 1, 16, 0xffff, 16, FALSE, dont, |
| 876 | ppc64_elf_unhandled_reloc), |
| 877 | |
| 878 | /* Like R_PPC64_TPREL16_HI, but no overflow. */ |
| 879 | HOW (R_PPC64_TPREL16_HIGH, 1, 16, 0xffff, 16, FALSE, dont, |
| 880 | ppc64_elf_unhandled_reloc), |
| 881 | |
| 882 | /* Like R_PPC64_TPREL16_HA, but no overflow. */ |
| 883 | HOW (R_PPC64_TPREL16_HIGHA, 1, 16, 0xffff, 16, FALSE, dont, |
| 884 | ppc64_elf_unhandled_reloc), |
| 885 | |
| 886 | /* Marker reloc on ELFv2 large-model function entry. */ |
| 887 | HOW (R_PPC64_ENTRY, 2, 32, 0, 0, FALSE, dont, |
| 888 | bfd_elf_generic_reloc), |
| 889 | |
| 890 | /* Like ADDR64, but use local entry point of function. */ |
| 891 | HOW (R_PPC64_ADDR64_LOCAL, 4, 64, 0xffffffffffffffffULL, 0, FALSE, dont, |
| 892 | bfd_elf_generic_reloc), |
| 893 | |
| 894 | HOW (R_PPC64_PLTSEQ_NOTOC, 2, 32, 0, 0, FALSE, dont, |
| 895 | bfd_elf_generic_reloc), |
| 896 | |
| 897 | HOW (R_PPC64_PLTCALL_NOTOC, 2, 32, 0, 0, FALSE, dont, |
| 898 | bfd_elf_generic_reloc), |
| 899 | |
| 900 | HOW (R_PPC64_PCREL_OPT, 2, 32, 0, 0, FALSE, dont, |
| 901 | bfd_elf_generic_reloc), |
| 902 | |
| 903 | HOW (R_PPC64_D34, 4, 34, 0x3ffff0000ffffULL, 0, FALSE, signed, |
| 904 | ppc64_elf_prefix_reloc), |
| 905 | |
| 906 | HOW (R_PPC64_D34_LO, 4, 34, 0x3ffff0000ffffULL, 0, FALSE, dont, |
| 907 | ppc64_elf_prefix_reloc), |
| 908 | |
| 909 | HOW (R_PPC64_D34_HI30, 4, 34, 0x3ffff0000ffffULL, 34, FALSE, dont, |
| 910 | ppc64_elf_prefix_reloc), |
| 911 | |
| 912 | HOW (R_PPC64_D34_HA30, 4, 34, 0x3ffff0000ffffULL, 34, FALSE, dont, |
| 913 | ppc64_elf_prefix_reloc), |
| 914 | |
| 915 | HOW (R_PPC64_PCREL34, 4, 34, 0x3ffff0000ffffULL, 0, TRUE, signed, |
| 916 | ppc64_elf_prefix_reloc), |
| 917 | |
| 918 | HOW (R_PPC64_GOT_PCREL34, 4, 34, 0x3ffff0000ffffULL, 0, TRUE, signed, |
| 919 | ppc64_elf_unhandled_reloc), |
| 920 | |
| 921 | HOW (R_PPC64_PLT_PCREL34, 4, 34, 0x3ffff0000ffffULL, 0, TRUE, signed, |
| 922 | ppc64_elf_unhandled_reloc), |
| 923 | |
| 924 | HOW (R_PPC64_PLT_PCREL34_NOTOC, 4, 34, 0x3ffff0000ffffULL, 0, TRUE, signed, |
| 925 | ppc64_elf_unhandled_reloc), |
| 926 | |
| 927 | HOW (R_PPC64_TPREL34, 4, 34, 0x3ffff0000ffffULL, 0, FALSE, signed, |
| 928 | ppc64_elf_unhandled_reloc), |
| 929 | |
| 930 | HOW (R_PPC64_DTPREL34, 4, 34, 0x3ffff0000ffffULL, 0, FALSE, signed, |
| 931 | ppc64_elf_unhandled_reloc), |
| 932 | |
| 933 | HOW (R_PPC64_GOT_TLSGD34, 4, 34, 0x3ffff0000ffffULL, 0, TRUE, signed, |
| 934 | ppc64_elf_unhandled_reloc), |
| 935 | |
| 936 | HOW (R_PPC64_GOT_TLSLD34, 4, 34, 0x3ffff0000ffffULL, 0, TRUE, signed, |
| 937 | ppc64_elf_unhandled_reloc), |
| 938 | |
| 939 | HOW (R_PPC64_GOT_TPREL34, 4, 34, 0x3ffff0000ffffULL, 0, TRUE, signed, |
| 940 | ppc64_elf_unhandled_reloc), |
| 941 | |
| 942 | HOW (R_PPC64_GOT_DTPREL34, 4, 34, 0x3ffff0000ffffULL, 0, TRUE, signed, |
| 943 | ppc64_elf_unhandled_reloc), |
| 944 | |
| 945 | HOW (R_PPC64_ADDR16_HIGHER34, 1, 16, 0xffff, 34, FALSE, dont, |
| 946 | bfd_elf_generic_reloc), |
| 947 | |
| 948 | HOW (R_PPC64_ADDR16_HIGHERA34, 1, 16, 0xffff, 34, FALSE, dont, |
| 949 | ppc64_elf_ha_reloc), |
| 950 | |
| 951 | HOW (R_PPC64_ADDR16_HIGHEST34, 1, 16, 0xffff, 50, FALSE, dont, |
| 952 | bfd_elf_generic_reloc), |
| 953 | |
| 954 | HOW (R_PPC64_ADDR16_HIGHESTA34, 1, 16, 0xffff, 50, FALSE, dont, |
| 955 | ppc64_elf_ha_reloc), |
| 956 | |
| 957 | HOW (R_PPC64_REL16_HIGHER34, 1, 16, 0xffff, 34, TRUE, dont, |
| 958 | bfd_elf_generic_reloc), |
| 959 | |
| 960 | HOW (R_PPC64_REL16_HIGHERA34, 1, 16, 0xffff, 34, TRUE, dont, |
| 961 | ppc64_elf_ha_reloc), |
| 962 | |
| 963 | HOW (R_PPC64_REL16_HIGHEST34, 1, 16, 0xffff, 50, TRUE, dont, |
| 964 | bfd_elf_generic_reloc), |
| 965 | |
| 966 | HOW (R_PPC64_REL16_HIGHESTA34, 1, 16, 0xffff, 50, TRUE, dont, |
| 967 | ppc64_elf_ha_reloc), |
| 968 | |
| 969 | HOW (R_PPC64_D28, 4, 28, 0xfff0000ffffULL, 0, FALSE, signed, |
| 970 | ppc64_elf_prefix_reloc), |
| 971 | |
| 972 | HOW (R_PPC64_PCREL28, 4, 28, 0xfff0000ffffULL, 0, TRUE, signed, |
| 973 | ppc64_elf_prefix_reloc), |
| 974 | |
| 975 | /* GNU extension to record C++ vtable hierarchy. */ |
| 976 | HOW (R_PPC64_GNU_VTINHERIT, 0, 0, 0, 0, FALSE, dont, |
| 977 | NULL), |
| 978 | |
| 979 | /* GNU extension to record C++ vtable member usage. */ |
| 980 | HOW (R_PPC64_GNU_VTENTRY, 0, 0, 0, 0, FALSE, dont, |
| 981 | NULL), |
| 982 | }; |
| 983 | |
| 984 | \f |
| 985 | /* Initialize the ppc64_elf_howto_table, so that linear accesses can |
| 986 | be done. */ |
| 987 | |
| 988 | static void |
| 989 | ppc_howto_init (void) |
| 990 | { |
| 991 | unsigned int i, type; |
| 992 | |
| 993 | for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++) |
| 994 | { |
| 995 | type = ppc64_elf_howto_raw[i].type; |
| 996 | BFD_ASSERT (type < ARRAY_SIZE (ppc64_elf_howto_table)); |
| 997 | ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i]; |
| 998 | } |
| 999 | } |
| 1000 | |
| 1001 | static reloc_howto_type * |
| 1002 | ppc64_elf_reloc_type_lookup (bfd *abfd, |
| 1003 | bfd_reloc_code_real_type code) |
| 1004 | { |
| 1005 | enum elf_ppc64_reloc_type r = R_PPC64_NONE; |
| 1006 | |
| 1007 | if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) |
| 1008 | /* Initialize howto table if needed. */ |
| 1009 | ppc_howto_init (); |
| 1010 | |
| 1011 | switch (code) |
| 1012 | { |
| 1013 | default: |
| 1014 | /* xgettext:c-format */ |
| 1015 | _bfd_error_handler (_("%pB: unsupported relocation type %#x"), abfd, |
| 1016 | (int) code); |
| 1017 | bfd_set_error (bfd_error_bad_value); |
| 1018 | return NULL; |
| 1019 | |
| 1020 | case BFD_RELOC_NONE: r = R_PPC64_NONE; |
| 1021 | break; |
| 1022 | case BFD_RELOC_32: r = R_PPC64_ADDR32; |
| 1023 | break; |
| 1024 | case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24; |
| 1025 | break; |
| 1026 | case BFD_RELOC_16: r = R_PPC64_ADDR16; |
| 1027 | break; |
| 1028 | case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO; |
| 1029 | break; |
| 1030 | case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI; |
| 1031 | break; |
| 1032 | case BFD_RELOC_PPC64_ADDR16_HIGH: r = R_PPC64_ADDR16_HIGH; |
| 1033 | break; |
| 1034 | case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA; |
| 1035 | break; |
| 1036 | case BFD_RELOC_PPC64_ADDR16_HIGHA: r = R_PPC64_ADDR16_HIGHA; |
| 1037 | break; |
| 1038 | case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14; |
| 1039 | break; |
| 1040 | case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN; |
| 1041 | break; |
| 1042 | case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN; |
| 1043 | break; |
| 1044 | case BFD_RELOC_PPC_B26: r = R_PPC64_REL24; |
| 1045 | break; |
| 1046 | case BFD_RELOC_PPC64_REL24_NOTOC: r = R_PPC64_REL24_NOTOC; |
| 1047 | break; |
| 1048 | case BFD_RELOC_PPC_B16: r = R_PPC64_REL14; |
| 1049 | break; |
| 1050 | case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN; |
| 1051 | break; |
| 1052 | case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN; |
| 1053 | break; |
| 1054 | case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16; |
| 1055 | break; |
| 1056 | case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO; |
| 1057 | break; |
| 1058 | case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI; |
| 1059 | break; |
| 1060 | case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA; |
| 1061 | break; |
| 1062 | case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY; |
| 1063 | break; |
| 1064 | case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT; |
| 1065 | break; |
| 1066 | case BFD_RELOC_32_PCREL: r = R_PPC64_REL32; |
| 1067 | break; |
| 1068 | case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32; |
| 1069 | break; |
| 1070 | case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32; |
| 1071 | break; |
| 1072 | case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO; |
| 1073 | break; |
| 1074 | case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI; |
| 1075 | break; |
| 1076 | case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA; |
| 1077 | break; |
| 1078 | case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF; |
| 1079 | break; |
| 1080 | case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO; |
| 1081 | break; |
| 1082 | case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI; |
| 1083 | break; |
| 1084 | case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA; |
| 1085 | break; |
| 1086 | case BFD_RELOC_CTOR: r = R_PPC64_ADDR64; |
| 1087 | break; |
| 1088 | case BFD_RELOC_64: r = R_PPC64_ADDR64; |
| 1089 | break; |
| 1090 | case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER; |
| 1091 | break; |
| 1092 | case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA; |
| 1093 | break; |
| 1094 | case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST; |
| 1095 | break; |
| 1096 | case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA; |
| 1097 | break; |
| 1098 | case BFD_RELOC_64_PCREL: r = R_PPC64_REL64; |
| 1099 | break; |
| 1100 | case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64; |
| 1101 | break; |
| 1102 | case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64; |
| 1103 | break; |
| 1104 | case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16; |
| 1105 | break; |
| 1106 | case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO; |
| 1107 | break; |
| 1108 | case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI; |
| 1109 | break; |
| 1110 | case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA; |
| 1111 | break; |
| 1112 | case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC; |
| 1113 | break; |
| 1114 | case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16; |
| 1115 | break; |
| 1116 | case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO; |
| 1117 | break; |
| 1118 | case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI; |
| 1119 | break; |
| 1120 | case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA; |
| 1121 | break; |
| 1122 | case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS; |
| 1123 | break; |
| 1124 | case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS; |
| 1125 | break; |
| 1126 | case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS; |
| 1127 | break; |
| 1128 | case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS; |
| 1129 | break; |
| 1130 | case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS; |
| 1131 | break; |
| 1132 | case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS; |
| 1133 | break; |
| 1134 | case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS; |
| 1135 | break; |
| 1136 | case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS; |
| 1137 | break; |
| 1138 | case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS; |
| 1139 | break; |
| 1140 | case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS; |
| 1141 | break; |
| 1142 | case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS; |
| 1143 | break; |
| 1144 | case BFD_RELOC_PPC64_TLS_PCREL: |
| 1145 | case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS; |
| 1146 | break; |
| 1147 | case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD; |
| 1148 | break; |
| 1149 | case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD; |
| 1150 | break; |
| 1151 | case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64; |
| 1152 | break; |
| 1153 | case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16; |
| 1154 | break; |
| 1155 | case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO; |
| 1156 | break; |
| 1157 | case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI; |
| 1158 | break; |
| 1159 | case BFD_RELOC_PPC64_TPREL16_HIGH: r = R_PPC64_TPREL16_HIGH; |
| 1160 | break; |
| 1161 | case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA; |
| 1162 | break; |
| 1163 | case BFD_RELOC_PPC64_TPREL16_HIGHA: r = R_PPC64_TPREL16_HIGHA; |
| 1164 | break; |
| 1165 | case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64; |
| 1166 | break; |
| 1167 | case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16; |
| 1168 | break; |
| 1169 | case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO; |
| 1170 | break; |
| 1171 | case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI; |
| 1172 | break; |
| 1173 | case BFD_RELOC_PPC64_DTPREL16_HIGH: r = R_PPC64_DTPREL16_HIGH; |
| 1174 | break; |
| 1175 | case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA; |
| 1176 | break; |
| 1177 | case BFD_RELOC_PPC64_DTPREL16_HIGHA: r = R_PPC64_DTPREL16_HIGHA; |
| 1178 | break; |
| 1179 | case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64; |
| 1180 | break; |
| 1181 | case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16; |
| 1182 | break; |
| 1183 | case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO; |
| 1184 | break; |
| 1185 | case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI; |
| 1186 | break; |
| 1187 | case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA; |
| 1188 | break; |
| 1189 | case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16; |
| 1190 | break; |
| 1191 | case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO; |
| 1192 | break; |
| 1193 | case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI; |
| 1194 | break; |
| 1195 | case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA; |
| 1196 | break; |
| 1197 | case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS; |
| 1198 | break; |
| 1199 | case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS; |
| 1200 | break; |
| 1201 | case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI; |
| 1202 | break; |
| 1203 | case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA; |
| 1204 | break; |
| 1205 | case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS; |
| 1206 | break; |
| 1207 | case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS; |
| 1208 | break; |
| 1209 | case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI; |
| 1210 | break; |
| 1211 | case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA; |
| 1212 | break; |
| 1213 | case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS; |
| 1214 | break; |
| 1215 | case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS; |
| 1216 | break; |
| 1217 | case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER; |
| 1218 | break; |
| 1219 | case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA; |
| 1220 | break; |
| 1221 | case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST; |
| 1222 | break; |
| 1223 | case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA; |
| 1224 | break; |
| 1225 | case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS; |
| 1226 | break; |
| 1227 | case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS; |
| 1228 | break; |
| 1229 | case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER; |
| 1230 | break; |
| 1231 | case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA; |
| 1232 | break; |
| 1233 | case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST; |
| 1234 | break; |
| 1235 | case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA; |
| 1236 | break; |
| 1237 | case BFD_RELOC_16_PCREL: r = R_PPC64_REL16; |
| 1238 | break; |
| 1239 | case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO; |
| 1240 | break; |
| 1241 | case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI; |
| 1242 | break; |
| 1243 | case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA; |
| 1244 | break; |
| 1245 | case BFD_RELOC_PPC64_REL16_HIGH: r = R_PPC64_REL16_HIGH; |
| 1246 | break; |
| 1247 | case BFD_RELOC_PPC64_REL16_HIGHA: r = R_PPC64_REL16_HIGHA; |
| 1248 | break; |
| 1249 | case BFD_RELOC_PPC64_REL16_HIGHER: r = R_PPC64_REL16_HIGHER; |
| 1250 | break; |
| 1251 | case BFD_RELOC_PPC64_REL16_HIGHERA: r = R_PPC64_REL16_HIGHERA; |
| 1252 | break; |
| 1253 | case BFD_RELOC_PPC64_REL16_HIGHEST: r = R_PPC64_REL16_HIGHEST; |
| 1254 | break; |
| 1255 | case BFD_RELOC_PPC64_REL16_HIGHESTA: r = R_PPC64_REL16_HIGHESTA; |
| 1256 | break; |
| 1257 | case BFD_RELOC_PPC_16DX_HA: r = R_PPC64_16DX_HA; |
| 1258 | break; |
| 1259 | case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC64_REL16DX_HA; |
| 1260 | break; |
| 1261 | case BFD_RELOC_PPC64_ENTRY: r = R_PPC64_ENTRY; |
| 1262 | break; |
| 1263 | case BFD_RELOC_PPC64_ADDR64_LOCAL: r = R_PPC64_ADDR64_LOCAL; |
| 1264 | break; |
| 1265 | case BFD_RELOC_PPC64_D34: r = R_PPC64_D34; |
| 1266 | break; |
| 1267 | case BFD_RELOC_PPC64_D34_LO: r = R_PPC64_D34_LO; |
| 1268 | break; |
| 1269 | case BFD_RELOC_PPC64_D34_HI30: r = R_PPC64_D34_HI30; |
| 1270 | break; |
| 1271 | case BFD_RELOC_PPC64_D34_HA30: r = R_PPC64_D34_HA30; |
| 1272 | break; |
| 1273 | case BFD_RELOC_PPC64_PCREL34: r = R_PPC64_PCREL34; |
| 1274 | break; |
| 1275 | case BFD_RELOC_PPC64_GOT_PCREL34: r = R_PPC64_GOT_PCREL34; |
| 1276 | break; |
| 1277 | case BFD_RELOC_PPC64_PLT_PCREL34: r = R_PPC64_PLT_PCREL34; |
| 1278 | break; |
| 1279 | case BFD_RELOC_PPC64_TPREL34: r = R_PPC64_TPREL34; |
| 1280 | break; |
| 1281 | case BFD_RELOC_PPC64_DTPREL34: r = R_PPC64_DTPREL34; |
| 1282 | break; |
| 1283 | case BFD_RELOC_PPC64_GOT_TLSGD34: r = R_PPC64_GOT_TLSGD34; |
| 1284 | break; |
| 1285 | case BFD_RELOC_PPC64_GOT_TLSLD34: r = R_PPC64_GOT_TLSLD34; |
| 1286 | break; |
| 1287 | case BFD_RELOC_PPC64_GOT_TPREL34: r = R_PPC64_GOT_TPREL34; |
| 1288 | break; |
| 1289 | case BFD_RELOC_PPC64_GOT_DTPREL34: r = R_PPC64_GOT_DTPREL34; |
| 1290 | break; |
| 1291 | case BFD_RELOC_PPC64_ADDR16_HIGHER34: r = R_PPC64_ADDR16_HIGHER34; |
| 1292 | break; |
| 1293 | case BFD_RELOC_PPC64_ADDR16_HIGHERA34: r = R_PPC64_ADDR16_HIGHERA34; |
| 1294 | break; |
| 1295 | case BFD_RELOC_PPC64_ADDR16_HIGHEST34: r = R_PPC64_ADDR16_HIGHEST34; |
| 1296 | break; |
| 1297 | case BFD_RELOC_PPC64_ADDR16_HIGHESTA34: r = R_PPC64_ADDR16_HIGHESTA34; |
| 1298 | break; |
| 1299 | case BFD_RELOC_PPC64_REL16_HIGHER34: r = R_PPC64_REL16_HIGHER34; |
| 1300 | break; |
| 1301 | case BFD_RELOC_PPC64_REL16_HIGHERA34: r = R_PPC64_REL16_HIGHERA34; |
| 1302 | break; |
| 1303 | case BFD_RELOC_PPC64_REL16_HIGHEST34: r = R_PPC64_REL16_HIGHEST34; |
| 1304 | break; |
| 1305 | case BFD_RELOC_PPC64_REL16_HIGHESTA34: r = R_PPC64_REL16_HIGHESTA34; |
| 1306 | break; |
| 1307 | case BFD_RELOC_PPC64_D28: r = R_PPC64_D28; |
| 1308 | break; |
| 1309 | case BFD_RELOC_PPC64_PCREL28: r = R_PPC64_PCREL28; |
| 1310 | break; |
| 1311 | case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT; |
| 1312 | break; |
| 1313 | case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY; |
| 1314 | break; |
| 1315 | } |
| 1316 | |
| 1317 | return ppc64_elf_howto_table[r]; |
| 1318 | }; |
| 1319 | |
| 1320 | static reloc_howto_type * |
| 1321 | ppc64_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 1322 | const char *r_name) |
| 1323 | { |
| 1324 | unsigned int i; |
| 1325 | |
| 1326 | for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++) |
| 1327 | if (ppc64_elf_howto_raw[i].name != NULL |
| 1328 | && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0) |
| 1329 | return &ppc64_elf_howto_raw[i]; |
| 1330 | |
| 1331 | return NULL; |
| 1332 | } |
| 1333 | |
| 1334 | /* Set the howto pointer for a PowerPC ELF reloc. */ |
| 1335 | |
| 1336 | static bfd_boolean |
| 1337 | ppc64_elf_info_to_howto (bfd *abfd, arelent *cache_ptr, |
| 1338 | Elf_Internal_Rela *dst) |
| 1339 | { |
| 1340 | unsigned int type; |
| 1341 | |
| 1342 | /* Initialize howto table if needed. */ |
| 1343 | if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) |
| 1344 | ppc_howto_init (); |
| 1345 | |
| 1346 | type = ELF64_R_TYPE (dst->r_info); |
| 1347 | if (type >= ARRAY_SIZE (ppc64_elf_howto_table)) |
| 1348 | { |
| 1349 | /* xgettext:c-format */ |
| 1350 | _bfd_error_handler (_("%pB: unsupported relocation type %#x"), |
| 1351 | abfd, type); |
| 1352 | bfd_set_error (bfd_error_bad_value); |
| 1353 | return FALSE; |
| 1354 | } |
| 1355 | cache_ptr->howto = ppc64_elf_howto_table[type]; |
| 1356 | if (cache_ptr->howto == NULL || cache_ptr->howto->name == NULL) |
| 1357 | { |
| 1358 | /* xgettext:c-format */ |
| 1359 | _bfd_error_handler (_("%pB: unsupported relocation type %#x"), |
| 1360 | abfd, type); |
| 1361 | bfd_set_error (bfd_error_bad_value); |
| 1362 | return FALSE; |
| 1363 | } |
| 1364 | |
| 1365 | return TRUE; |
| 1366 | } |
| 1367 | |
| 1368 | /* Handle the R_PPC64_ADDR16_HA and similar relocs. */ |
| 1369 | |
| 1370 | static bfd_reloc_status_type |
| 1371 | ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
| 1372 | void *data, asection *input_section, |
| 1373 | bfd *output_bfd, char **error_message) |
| 1374 | { |
| 1375 | enum elf_ppc64_reloc_type r_type; |
| 1376 | long insn; |
| 1377 | bfd_size_type octets; |
| 1378 | bfd_vma value; |
| 1379 | |
| 1380 | /* If this is a relocatable link (output_bfd test tells us), just |
| 1381 | call the generic function. Any adjustment will be done at final |
| 1382 | link time. */ |
| 1383 | if (output_bfd != NULL) |
| 1384 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| 1385 | input_section, output_bfd, error_message); |
| 1386 | |
| 1387 | /* Adjust the addend for sign extension of the low 16 (or 34) bits. |
| 1388 | We won't actually be using the low bits, so trashing them |
| 1389 | doesn't matter. */ |
| 1390 | r_type = reloc_entry->howto->type; |
| 1391 | if (r_type == R_PPC64_ADDR16_HIGHERA34 |
| 1392 | || r_type == R_PPC64_ADDR16_HIGHESTA34 |
| 1393 | || r_type == R_PPC64_REL16_HIGHERA34 |
| 1394 | || r_type == R_PPC64_REL16_HIGHESTA34) |
| 1395 | reloc_entry->addend += 1ULL << 33; |
| 1396 | else |
| 1397 | reloc_entry->addend += 1U << 15; |
| 1398 | if (r_type != R_PPC64_REL16DX_HA) |
| 1399 | return bfd_reloc_continue; |
| 1400 | |
| 1401 | value = 0; |
| 1402 | if (!bfd_is_com_section (symbol->section)) |
| 1403 | value = symbol->value; |
| 1404 | value += (reloc_entry->addend |
| 1405 | + symbol->section->output_offset |
| 1406 | + symbol->section->output_section->vma); |
| 1407 | value -= (reloc_entry->address |
| 1408 | + input_section->output_offset |
| 1409 | + input_section->output_section->vma); |
| 1410 | value = (bfd_signed_vma) value >> 16; |
| 1411 | |
| 1412 | octets = reloc_entry->address * OCTETS_PER_BYTE (abfd, input_section); |
| 1413 | insn = bfd_get_32 (abfd, (bfd_byte *) data + octets); |
| 1414 | insn &= ~0x1fffc1; |
| 1415 | insn |= (value & 0xffc1) | ((value & 0x3e) << 15); |
| 1416 | bfd_put_32 (abfd, insn, (bfd_byte *) data + octets); |
| 1417 | if (value + 0x8000 > 0xffff) |
| 1418 | return bfd_reloc_overflow; |
| 1419 | return bfd_reloc_ok; |
| 1420 | } |
| 1421 | |
| 1422 | static bfd_reloc_status_type |
| 1423 | ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
| 1424 | void *data, asection *input_section, |
| 1425 | bfd *output_bfd, char **error_message) |
| 1426 | { |
| 1427 | if (output_bfd != NULL) |
| 1428 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| 1429 | input_section, output_bfd, error_message); |
| 1430 | |
| 1431 | if (strcmp (symbol->section->name, ".opd") == 0 |
| 1432 | && (symbol->section->owner->flags & DYNAMIC) == 0) |
| 1433 | { |
| 1434 | bfd_vma dest = opd_entry_value (symbol->section, |
| 1435 | symbol->value + reloc_entry->addend, |
| 1436 | NULL, NULL, FALSE); |
| 1437 | if (dest != (bfd_vma) -1) |
| 1438 | reloc_entry->addend = dest - (symbol->value |
| 1439 | + symbol->section->output_section->vma |
| 1440 | + symbol->section->output_offset); |
| 1441 | } |
| 1442 | else |
| 1443 | { |
| 1444 | elf_symbol_type *elfsym = (elf_symbol_type *) symbol; |
| 1445 | |
| 1446 | if (symbol->section->owner != abfd |
| 1447 | && symbol->section->owner != NULL |
| 1448 | && abiversion (symbol->section->owner) >= 2) |
| 1449 | { |
| 1450 | unsigned int i; |
| 1451 | |
| 1452 | for (i = 0; i < symbol->section->owner->symcount; ++i) |
| 1453 | { |
| 1454 | asymbol *symdef = symbol->section->owner->outsymbols[i]; |
| 1455 | |
| 1456 | if (strcmp (symdef->name, symbol->name) == 0) |
| 1457 | { |
| 1458 | elfsym = (elf_symbol_type *) symdef; |
| 1459 | break; |
| 1460 | } |
| 1461 | } |
| 1462 | } |
| 1463 | reloc_entry->addend |
| 1464 | += PPC64_LOCAL_ENTRY_OFFSET (elfsym->internal_elf_sym.st_other); |
| 1465 | } |
| 1466 | return bfd_reloc_continue; |
| 1467 | } |
| 1468 | |
| 1469 | static bfd_reloc_status_type |
| 1470 | ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
| 1471 | void *data, asection *input_section, |
| 1472 | bfd *output_bfd, char **error_message) |
| 1473 | { |
| 1474 | long insn; |
| 1475 | enum elf_ppc64_reloc_type r_type; |
| 1476 | bfd_size_type octets; |
| 1477 | /* Assume 'at' branch hints. */ |
| 1478 | bfd_boolean is_isa_v2 = TRUE; |
| 1479 | |
| 1480 | /* If this is a relocatable link (output_bfd test tells us), just |
| 1481 | call the generic function. Any adjustment will be done at final |
| 1482 | link time. */ |
| 1483 | if (output_bfd != NULL) |
| 1484 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| 1485 | input_section, output_bfd, error_message); |
| 1486 | |
| 1487 | octets = reloc_entry->address * OCTETS_PER_BYTE (abfd, input_section); |
| 1488 | insn = bfd_get_32 (abfd, (bfd_byte *) data + octets); |
| 1489 | insn &= ~(0x01 << 21); |
| 1490 | r_type = reloc_entry->howto->type; |
| 1491 | if (r_type == R_PPC64_ADDR14_BRTAKEN |
| 1492 | || r_type == R_PPC64_REL14_BRTAKEN) |
| 1493 | insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */ |
| 1494 | |
| 1495 | if (is_isa_v2) |
| 1496 | { |
| 1497 | /* Set 'a' bit. This is 0b00010 in BO field for branch |
| 1498 | on CR(BI) insns (BO == 001at or 011at), and 0b01000 |
| 1499 | for branch on CTR insns (BO == 1a00t or 1a01t). */ |
| 1500 | if ((insn & (0x14 << 21)) == (0x04 << 21)) |
| 1501 | insn |= 0x02 << 21; |
| 1502 | else if ((insn & (0x14 << 21)) == (0x10 << 21)) |
| 1503 | insn |= 0x08 << 21; |
| 1504 | else |
| 1505 | goto out; |
| 1506 | } |
| 1507 | else |
| 1508 | { |
| 1509 | bfd_vma target = 0; |
| 1510 | bfd_vma from; |
| 1511 | |
| 1512 | if (!bfd_is_com_section (symbol->section)) |
| 1513 | target = symbol->value; |
| 1514 | target += symbol->section->output_section->vma; |
| 1515 | target += symbol->section->output_offset; |
| 1516 | target += reloc_entry->addend; |
| 1517 | |
| 1518 | from = (reloc_entry->address |
| 1519 | + input_section->output_offset |
| 1520 | + input_section->output_section->vma); |
| 1521 | |
| 1522 | /* Invert 'y' bit if not the default. */ |
| 1523 | if ((bfd_signed_vma) (target - from) < 0) |
| 1524 | insn ^= 0x01 << 21; |
| 1525 | } |
| 1526 | bfd_put_32 (abfd, insn, (bfd_byte *) data + octets); |
| 1527 | out: |
| 1528 | return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data, |
| 1529 | input_section, output_bfd, error_message); |
| 1530 | } |
| 1531 | |
| 1532 | static bfd_reloc_status_type |
| 1533 | ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
| 1534 | void *data, asection *input_section, |
| 1535 | bfd *output_bfd, char **error_message) |
| 1536 | { |
| 1537 | /* If this is a relocatable link (output_bfd test tells us), just |
| 1538 | call the generic function. Any adjustment will be done at final |
| 1539 | link time. */ |
| 1540 | if (output_bfd != NULL) |
| 1541 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| 1542 | input_section, output_bfd, error_message); |
| 1543 | |
| 1544 | /* Subtract the symbol section base address. */ |
| 1545 | reloc_entry->addend -= symbol->section->output_section->vma; |
| 1546 | return bfd_reloc_continue; |
| 1547 | } |
| 1548 | |
| 1549 | static bfd_reloc_status_type |
| 1550 | ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
| 1551 | void *data, asection *input_section, |
| 1552 | bfd *output_bfd, char **error_message) |
| 1553 | { |
| 1554 | /* If this is a relocatable link (output_bfd test tells us), just |
| 1555 | call the generic function. Any adjustment will be done at final |
| 1556 | link time. */ |
| 1557 | if (output_bfd != NULL) |
| 1558 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| 1559 | input_section, output_bfd, error_message); |
| 1560 | |
| 1561 | /* Subtract the symbol section base address. */ |
| 1562 | reloc_entry->addend -= symbol->section->output_section->vma; |
| 1563 | |
| 1564 | /* Adjust the addend for sign extension of the low 16 bits. */ |
| 1565 | reloc_entry->addend += 0x8000; |
| 1566 | return bfd_reloc_continue; |
| 1567 | } |
| 1568 | |
| 1569 | static bfd_reloc_status_type |
| 1570 | ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
| 1571 | void *data, asection *input_section, |
| 1572 | bfd *output_bfd, char **error_message) |
| 1573 | { |
| 1574 | bfd_vma TOCstart; |
| 1575 | |
| 1576 | /* If this is a relocatable link (output_bfd test tells us), just |
| 1577 | call the generic function. Any adjustment will be done at final |
| 1578 | link time. */ |
| 1579 | if (output_bfd != NULL) |
| 1580 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| 1581 | input_section, output_bfd, error_message); |
| 1582 | |
| 1583 | TOCstart = _bfd_get_gp_value (input_section->output_section->owner); |
| 1584 | if (TOCstart == 0) |
| 1585 | TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner); |
| 1586 | |
| 1587 | /* Subtract the TOC base address. */ |
| 1588 | reloc_entry->addend -= TOCstart + TOC_BASE_OFF; |
| 1589 | return bfd_reloc_continue; |
| 1590 | } |
| 1591 | |
| 1592 | static bfd_reloc_status_type |
| 1593 | ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
| 1594 | void *data, asection *input_section, |
| 1595 | bfd *output_bfd, char **error_message) |
| 1596 | { |
| 1597 | bfd_vma TOCstart; |
| 1598 | |
| 1599 | /* If this is a relocatable link (output_bfd test tells us), just |
| 1600 | call the generic function. Any adjustment will be done at final |
| 1601 | link time. */ |
| 1602 | if (output_bfd != NULL) |
| 1603 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| 1604 | input_section, output_bfd, error_message); |
| 1605 | |
| 1606 | TOCstart = _bfd_get_gp_value (input_section->output_section->owner); |
| 1607 | if (TOCstart == 0) |
| 1608 | TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner); |
| 1609 | |
| 1610 | /* Subtract the TOC base address. */ |
| 1611 | reloc_entry->addend -= TOCstart + TOC_BASE_OFF; |
| 1612 | |
| 1613 | /* Adjust the addend for sign extension of the low 16 bits. */ |
| 1614 | reloc_entry->addend += 0x8000; |
| 1615 | return bfd_reloc_continue; |
| 1616 | } |
| 1617 | |
| 1618 | static bfd_reloc_status_type |
| 1619 | ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
| 1620 | void *data, asection *input_section, |
| 1621 | bfd *output_bfd, char **error_message) |
| 1622 | { |
| 1623 | bfd_vma TOCstart; |
| 1624 | bfd_size_type octets; |
| 1625 | |
| 1626 | /* If this is a relocatable link (output_bfd test tells us), just |
| 1627 | call the generic function. Any adjustment will be done at final |
| 1628 | link time. */ |
| 1629 | if (output_bfd != NULL) |
| 1630 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| 1631 | input_section, output_bfd, error_message); |
| 1632 | |
| 1633 | TOCstart = _bfd_get_gp_value (input_section->output_section->owner); |
| 1634 | if (TOCstart == 0) |
| 1635 | TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner); |
| 1636 | |
| 1637 | octets = reloc_entry->address * OCTETS_PER_BYTE (abfd, input_section); |
| 1638 | bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets); |
| 1639 | return bfd_reloc_ok; |
| 1640 | } |
| 1641 | |
| 1642 | static bfd_reloc_status_type |
| 1643 | ppc64_elf_prefix_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
| 1644 | void *data, asection *input_section, |
| 1645 | bfd *output_bfd, char **error_message) |
| 1646 | { |
| 1647 | uint64_t insn; |
| 1648 | bfd_vma targ; |
| 1649 | |
| 1650 | if (output_bfd != NULL) |
| 1651 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| 1652 | input_section, output_bfd, error_message); |
| 1653 | |
| 1654 | insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); |
| 1655 | insn <<= 32; |
| 1656 | insn |= bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address + 4); |
| 1657 | |
| 1658 | targ = (symbol->section->output_section->vma |
| 1659 | + symbol->section->output_offset |
| 1660 | + reloc_entry->addend); |
| 1661 | if (!bfd_is_com_section (symbol->section)) |
| 1662 | targ += symbol->value; |
| 1663 | if (reloc_entry->howto->type == R_PPC64_D34_HA30) |
| 1664 | targ += 1ULL << 33; |
| 1665 | if (reloc_entry->howto->pc_relative) |
| 1666 | { |
| 1667 | bfd_vma from = (reloc_entry->address |
| 1668 | + input_section->output_offset |
| 1669 | + input_section->output_section->vma); |
| 1670 | targ -=from; |
| 1671 | } |
| 1672 | targ >>= reloc_entry->howto->rightshift; |
| 1673 | insn &= ~reloc_entry->howto->dst_mask; |
| 1674 | insn |= ((targ << 16) | (targ & 0xffff)) & reloc_entry->howto->dst_mask; |
| 1675 | bfd_put_32 (abfd, insn >> 32, (bfd_byte *) data + reloc_entry->address); |
| 1676 | bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address + 4); |
| 1677 | if (reloc_entry->howto->complain_on_overflow == complain_overflow_signed |
| 1678 | && (targ + (1ULL << (reloc_entry->howto->bitsize - 1)) |
| 1679 | >= 1ULL << reloc_entry->howto->bitsize)) |
| 1680 | return bfd_reloc_overflow; |
| 1681 | return bfd_reloc_ok; |
| 1682 | } |
| 1683 | |
| 1684 | static bfd_reloc_status_type |
| 1685 | ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
| 1686 | void *data, asection *input_section, |
| 1687 | bfd *output_bfd, char **error_message) |
| 1688 | { |
| 1689 | /* If this is a relocatable link (output_bfd test tells us), just |
| 1690 | call the generic function. Any adjustment will be done at final |
| 1691 | link time. */ |
| 1692 | if (output_bfd != NULL) |
| 1693 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| 1694 | input_section, output_bfd, error_message); |
| 1695 | |
| 1696 | if (error_message != NULL) |
| 1697 | { |
| 1698 | static char buf[60]; |
| 1699 | sprintf (buf, "generic linker can't handle %s", |
| 1700 | reloc_entry->howto->name); |
| 1701 | *error_message = buf; |
| 1702 | } |
| 1703 | return bfd_reloc_dangerous; |
| 1704 | } |
| 1705 | |
| 1706 | /* Track GOT entries needed for a given symbol. We might need more |
| 1707 | than one got entry per symbol. */ |
| 1708 | struct got_entry |
| 1709 | { |
| 1710 | struct got_entry *next; |
| 1711 | |
| 1712 | /* The symbol addend that we'll be placing in the GOT. */ |
| 1713 | bfd_vma addend; |
| 1714 | |
| 1715 | /* Unlike other ELF targets, we use separate GOT entries for the same |
| 1716 | symbol referenced from different input files. This is to support |
| 1717 | automatic multiple TOC/GOT sections, where the TOC base can vary |
| 1718 | from one input file to another. After partitioning into TOC groups |
| 1719 | we merge entries within the group. |
| 1720 | |
| 1721 | Point to the BFD owning this GOT entry. */ |
| 1722 | bfd *owner; |
| 1723 | |
| 1724 | /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD, |
| 1725 | TLS_TPREL or TLS_DTPREL for tls entries. */ |
| 1726 | unsigned char tls_type; |
| 1727 | |
| 1728 | /* Non-zero if got.ent points to real entry. */ |
| 1729 | unsigned char is_indirect; |
| 1730 | |
| 1731 | /* Reference count until size_dynamic_sections, GOT offset thereafter. */ |
| 1732 | union |
| 1733 | { |
| 1734 | bfd_signed_vma refcount; |
| 1735 | bfd_vma offset; |
| 1736 | struct got_entry *ent; |
| 1737 | } got; |
| 1738 | }; |
| 1739 | |
| 1740 | /* The same for PLT. */ |
| 1741 | struct plt_entry |
| 1742 | { |
| 1743 | struct plt_entry *next; |
| 1744 | |
| 1745 | bfd_vma addend; |
| 1746 | |
| 1747 | union |
| 1748 | { |
| 1749 | bfd_signed_vma refcount; |
| 1750 | bfd_vma offset; |
| 1751 | } plt; |
| 1752 | }; |
| 1753 | |
| 1754 | struct ppc64_elf_obj_tdata |
| 1755 | { |
| 1756 | struct elf_obj_tdata elf; |
| 1757 | |
| 1758 | /* Shortcuts to dynamic linker sections. */ |
| 1759 | asection *got; |
| 1760 | asection *relgot; |
| 1761 | |
| 1762 | /* Used during garbage collection. We attach global symbols defined |
| 1763 | on removed .opd entries to this section so that the sym is removed. */ |
| 1764 | asection *deleted_section; |
| 1765 | |
| 1766 | /* TLS local dynamic got entry handling. Support for multiple GOT |
| 1767 | sections means we potentially need one of these for each input bfd. */ |
| 1768 | struct got_entry tlsld_got; |
| 1769 | |
| 1770 | union |
| 1771 | { |
| 1772 | /* A copy of relocs before they are modified for --emit-relocs. */ |
| 1773 | Elf_Internal_Rela *relocs; |
| 1774 | |
| 1775 | /* Section contents. */ |
| 1776 | bfd_byte *contents; |
| 1777 | } opd; |
| 1778 | |
| 1779 | /* Nonzero if this bfd has small toc/got relocs, ie. that expect |
| 1780 | the reloc to be in the range -32768 to 32767. */ |
| 1781 | unsigned int has_small_toc_reloc : 1; |
| 1782 | |
| 1783 | /* Set if toc/got ha relocs detected not using r2, or lo reloc |
| 1784 | instruction not one we handle. */ |
| 1785 | unsigned int unexpected_toc_insn : 1; |
| 1786 | |
| 1787 | /* Set if PLT/GOT/TOC relocs that can be optimised are present in |
| 1788 | this file. */ |
| 1789 | unsigned int has_optrel : 1; |
| 1790 | }; |
| 1791 | |
| 1792 | #define ppc64_elf_tdata(bfd) \ |
| 1793 | ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any) |
| 1794 | |
| 1795 | #define ppc64_tlsld_got(bfd) \ |
| 1796 | (&ppc64_elf_tdata (bfd)->tlsld_got) |
| 1797 | |
| 1798 | #define is_ppc64_elf(bfd) \ |
| 1799 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ |
| 1800 | && elf_object_id (bfd) == PPC64_ELF_DATA) |
| 1801 | |
| 1802 | /* Override the generic function because we store some extras. */ |
| 1803 | |
| 1804 | static bfd_boolean |
| 1805 | ppc64_elf_mkobject (bfd *abfd) |
| 1806 | { |
| 1807 | return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata), |
| 1808 | PPC64_ELF_DATA); |
| 1809 | } |
| 1810 | |
| 1811 | /* Fix bad default arch selected for a 64 bit input bfd when the |
| 1812 | default is 32 bit. Also select arch based on apuinfo. */ |
| 1813 | |
| 1814 | static bfd_boolean |
| 1815 | ppc64_elf_object_p (bfd *abfd) |
| 1816 | { |
| 1817 | if (!abfd->arch_info->the_default) |
| 1818 | return TRUE; |
| 1819 | |
| 1820 | if (abfd->arch_info->bits_per_word == 32) |
| 1821 | { |
| 1822 | Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd); |
| 1823 | |
| 1824 | if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64) |
| 1825 | { |
| 1826 | /* Relies on arch after 32 bit default being 64 bit default. */ |
| 1827 | abfd->arch_info = abfd->arch_info->next; |
| 1828 | BFD_ASSERT (abfd->arch_info->bits_per_word == 64); |
| 1829 | } |
| 1830 | } |
| 1831 | return _bfd_elf_ppc_set_arch (abfd); |
| 1832 | } |
| 1833 | |
| 1834 | /* Support for core dump NOTE sections. */ |
| 1835 | |
| 1836 | static bfd_boolean |
| 1837 | ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
| 1838 | { |
| 1839 | size_t offset, size; |
| 1840 | |
| 1841 | if (note->descsz != 504) |
| 1842 | return FALSE; |
| 1843 | |
| 1844 | /* pr_cursig */ |
| 1845 | elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); |
| 1846 | |
| 1847 | /* pr_pid */ |
| 1848 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32); |
| 1849 | |
| 1850 | /* pr_reg */ |
| 1851 | offset = 112; |
| 1852 | size = 384; |
| 1853 | |
| 1854 | /* Make a ".reg/999" section. */ |
| 1855 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", |
| 1856 | size, note->descpos + offset); |
| 1857 | } |
| 1858 | |
| 1859 | static bfd_boolean |
| 1860 | ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
| 1861 | { |
| 1862 | if (note->descsz != 136) |
| 1863 | return FALSE; |
| 1864 | |
| 1865 | elf_tdata (abfd)->core->pid |
| 1866 | = bfd_get_32 (abfd, note->descdata + 24); |
| 1867 | elf_tdata (abfd)->core->program |
| 1868 | = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16); |
| 1869 | elf_tdata (abfd)->core->command |
| 1870 | = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80); |
| 1871 | |
| 1872 | return TRUE; |
| 1873 | } |
| 1874 | |
| 1875 | static char * |
| 1876 | ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, |
| 1877 | ...) |
| 1878 | { |
| 1879 | switch (note_type) |
| 1880 | { |
| 1881 | default: |
| 1882 | return NULL; |
| 1883 | |
| 1884 | case NT_PRPSINFO: |
| 1885 | { |
| 1886 | char data[136] ATTRIBUTE_NONSTRING; |
| 1887 | va_list ap; |
| 1888 | |
| 1889 | va_start (ap, note_type); |
| 1890 | memset (data, 0, sizeof (data)); |
| 1891 | strncpy (data + 40, va_arg (ap, const char *), 16); |
| 1892 | #if GCC_VERSION == 8000 || GCC_VERSION == 8001 |
| 1893 | DIAGNOSTIC_PUSH; |
| 1894 | /* GCC 8.0 and 8.1 warn about 80 equals destination size with |
| 1895 | -Wstringop-truncation: |
| 1896 | https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85643 |
| 1897 | */ |
| 1898 | DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION; |
| 1899 | #endif |
| 1900 | strncpy (data + 56, va_arg (ap, const char *), 80); |
| 1901 | #if GCC_VERSION == 8000 || GCC_VERSION == 8001 |
| 1902 | DIAGNOSTIC_POP; |
| 1903 | #endif |
| 1904 | va_end (ap); |
| 1905 | return elfcore_write_note (abfd, buf, bufsiz, |
| 1906 | "CORE", note_type, data, sizeof (data)); |
| 1907 | } |
| 1908 | |
| 1909 | case NT_PRSTATUS: |
| 1910 | { |
| 1911 | char data[504]; |
| 1912 | va_list ap; |
| 1913 | long pid; |
| 1914 | int cursig; |
| 1915 | const void *greg; |
| 1916 | |
| 1917 | va_start (ap, note_type); |
| 1918 | memset (data, 0, 112); |
| 1919 | pid = va_arg (ap, long); |
| 1920 | bfd_put_32 (abfd, pid, data + 32); |
| 1921 | cursig = va_arg (ap, int); |
| 1922 | bfd_put_16 (abfd, cursig, data + 12); |
| 1923 | greg = va_arg (ap, const void *); |
| 1924 | memcpy (data + 112, greg, 384); |
| 1925 | memset (data + 496, 0, 8); |
| 1926 | va_end (ap); |
| 1927 | return elfcore_write_note (abfd, buf, bufsiz, |
| 1928 | "CORE", note_type, data, sizeof (data)); |
| 1929 | } |
| 1930 | } |
| 1931 | } |
| 1932 | |
| 1933 | /* Add extra PPC sections. */ |
| 1934 | |
| 1935 | static const struct bfd_elf_special_section ppc64_elf_special_sections[] = |
| 1936 | { |
| 1937 | { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 }, |
| 1938 | { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, |
| 1939 | { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, |
| 1940 | { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, |
| 1941 | { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, |
| 1942 | { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, |
| 1943 | { NULL, 0, 0, 0, 0 } |
| 1944 | }; |
| 1945 | |
| 1946 | enum _ppc64_sec_type { |
| 1947 | sec_normal = 0, |
| 1948 | sec_opd = 1, |
| 1949 | sec_toc = 2 |
| 1950 | }; |
| 1951 | |
| 1952 | struct _ppc64_elf_section_data |
| 1953 | { |
| 1954 | struct bfd_elf_section_data elf; |
| 1955 | |
| 1956 | union |
| 1957 | { |
| 1958 | /* An array with one entry for each opd function descriptor, |
| 1959 | and some spares since opd entries may be either 16 or 24 bytes. */ |
| 1960 | #define OPD_NDX(OFF) ((OFF) >> 4) |
| 1961 | struct _opd_sec_data |
| 1962 | { |
| 1963 | /* Points to the function code section for local opd entries. */ |
| 1964 | asection **func_sec; |
| 1965 | |
| 1966 | /* After editing .opd, adjust references to opd local syms. */ |
| 1967 | long *adjust; |
| 1968 | } opd; |
| 1969 | |
| 1970 | /* An array for toc sections, indexed by offset/8. */ |
| 1971 | struct _toc_sec_data |
| 1972 | { |
| 1973 | /* Specifies the relocation symbol index used at a given toc offset. */ |
| 1974 | unsigned *symndx; |
| 1975 | |
| 1976 | /* And the relocation addend. */ |
| 1977 | bfd_vma *add; |
| 1978 | } toc; |
| 1979 | } u; |
| 1980 | |
| 1981 | enum _ppc64_sec_type sec_type:2; |
| 1982 | |
| 1983 | /* Flag set when small branches are detected. Used to |
| 1984 | select suitable defaults for the stub group size. */ |
| 1985 | unsigned int has_14bit_branch:1; |
| 1986 | |
| 1987 | /* Flag set when PLTCALL relocs are detected. */ |
| 1988 | unsigned int has_pltcall:1; |
| 1989 | |
| 1990 | /* Flag set when section has PLT/GOT/TOC relocations that can be |
| 1991 | optimised. */ |
| 1992 | unsigned int has_optrel:1; |
| 1993 | }; |
| 1994 | |
| 1995 | #define ppc64_elf_section_data(sec) \ |
| 1996 | ((struct _ppc64_elf_section_data *) elf_section_data (sec)) |
| 1997 | |
| 1998 | static bfd_boolean |
| 1999 | ppc64_elf_new_section_hook (bfd *abfd, asection *sec) |
| 2000 | { |
| 2001 | if (!sec->used_by_bfd) |
| 2002 | { |
| 2003 | struct _ppc64_elf_section_data *sdata; |
| 2004 | size_t amt = sizeof (*sdata); |
| 2005 | |
| 2006 | sdata = bfd_zalloc (abfd, amt); |
| 2007 | if (sdata == NULL) |
| 2008 | return FALSE; |
| 2009 | sec->used_by_bfd = sdata; |
| 2010 | } |
| 2011 | |
| 2012 | return _bfd_elf_new_section_hook (abfd, sec); |
| 2013 | } |
| 2014 | |
| 2015 | static bfd_boolean |
| 2016 | ppc64_elf_section_flags (const Elf_Internal_Shdr *hdr) |
| 2017 | { |
| 2018 | const char *name = hdr->bfd_section->name; |
| 2019 | |
| 2020 | if (strncmp (name, ".sbss", 5) == 0 |
| 2021 | || strncmp (name, ".sdata", 6) == 0) |
| 2022 | hdr->bfd_section->flags |= SEC_SMALL_DATA; |
| 2023 | |
| 2024 | return TRUE; |
| 2025 | } |
| 2026 | |
| 2027 | static struct _opd_sec_data * |
| 2028 | get_opd_info (asection * sec) |
| 2029 | { |
| 2030 | if (sec != NULL |
| 2031 | && ppc64_elf_section_data (sec) != NULL |
| 2032 | && ppc64_elf_section_data (sec)->sec_type == sec_opd) |
| 2033 | return &ppc64_elf_section_data (sec)->u.opd; |
| 2034 | return NULL; |
| 2035 | } |
| 2036 | \f |
| 2037 | /* Parameters for the qsort hook. */ |
| 2038 | static bfd_boolean synthetic_relocatable; |
| 2039 | static asection *synthetic_opd; |
| 2040 | |
| 2041 | /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */ |
| 2042 | |
| 2043 | static int |
| 2044 | compare_symbols (const void *ap, const void *bp) |
| 2045 | { |
| 2046 | const asymbol *a = *(const asymbol **) ap; |
| 2047 | const asymbol *b = *(const asymbol **) bp; |
| 2048 | |
| 2049 | /* Section symbols first. */ |
| 2050 | if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM)) |
| 2051 | return -1; |
| 2052 | if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM)) |
| 2053 | return 1; |
| 2054 | |
| 2055 | /* then .opd symbols. */ |
| 2056 | if (synthetic_opd != NULL) |
| 2057 | { |
| 2058 | if (strcmp (a->section->name, ".opd") == 0 |
| 2059 | && strcmp (b->section->name, ".opd") != 0) |
| 2060 | return -1; |
| 2061 | if (strcmp (a->section->name, ".opd") != 0 |
| 2062 | && strcmp (b->section->name, ".opd") == 0) |
| 2063 | return 1; |
| 2064 | } |
| 2065 | |
| 2066 | /* then other code symbols. */ |
| 2067 | if (((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL)) |
| 2068 | == (SEC_CODE | SEC_ALLOC)) |
| 2069 | && ((b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL)) |
| 2070 | != (SEC_CODE | SEC_ALLOC))) |
| 2071 | return -1; |
| 2072 | |
| 2073 | if (((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL)) |
| 2074 | != (SEC_CODE | SEC_ALLOC)) |
| 2075 | && ((b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL)) |
| 2076 | == (SEC_CODE | SEC_ALLOC))) |
| 2077 | return 1; |
| 2078 | |
| 2079 | if (synthetic_relocatable) |
| 2080 | { |
| 2081 | if (a->section->id < b->section->id) |
| 2082 | return -1; |
| 2083 | |
| 2084 | if (a->section->id > b->section->id) |
| 2085 | return 1; |
| 2086 | } |
| 2087 | |
| 2088 | if (a->value + a->section->vma < b->value + b->section->vma) |
| 2089 | return -1; |
| 2090 | |
| 2091 | if (a->value + a->section->vma > b->value + b->section->vma) |
| 2092 | return 1; |
| 2093 | |
| 2094 | /* For syms with the same value, prefer strong dynamic global function |
| 2095 | syms over other syms. */ |
| 2096 | if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0) |
| 2097 | return -1; |
| 2098 | |
| 2099 | if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0) |
| 2100 | return 1; |
| 2101 | |
| 2102 | if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0) |
| 2103 | return -1; |
| 2104 | |
| 2105 | if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0) |
| 2106 | return 1; |
| 2107 | |
| 2108 | if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0) |
| 2109 | return -1; |
| 2110 | |
| 2111 | if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0) |
| 2112 | return 1; |
| 2113 | |
| 2114 | if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0) |
| 2115 | return -1; |
| 2116 | |
| 2117 | if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0) |
| 2118 | return 1; |
| 2119 | |
| 2120 | /* Finally, sort on where the symbol is in memory. The symbols will |
| 2121 | be in at most two malloc'd blocks, one for static syms, one for |
| 2122 | dynamic syms, and we distinguish the two blocks above by testing |
| 2123 | BSF_DYNAMIC. Since we are sorting the symbol pointers which were |
| 2124 | originally in the same order as the symbols (and we're not |
| 2125 | sorting the symbols themselves), this ensures a stable sort. */ |
| 2126 | if (a < b) |
| 2127 | return -1; |
| 2128 | if (a > b) |
| 2129 | return 1; |
| 2130 | return 0; |
| 2131 | } |
| 2132 | |
| 2133 | /* Search SYMS for a symbol of the given VALUE. */ |
| 2134 | |
| 2135 | static asymbol * |
| 2136 | sym_exists_at (asymbol **syms, size_t lo, size_t hi, unsigned int id, |
| 2137 | bfd_vma value) |
| 2138 | { |
| 2139 | size_t mid; |
| 2140 | |
| 2141 | if (id == (unsigned) -1) |
| 2142 | { |
| 2143 | while (lo < hi) |
| 2144 | { |
| 2145 | mid = (lo + hi) >> 1; |
| 2146 | if (syms[mid]->value + syms[mid]->section->vma < value) |
| 2147 | lo = mid + 1; |
| 2148 | else if (syms[mid]->value + syms[mid]->section->vma > value) |
| 2149 | hi = mid; |
| 2150 | else |
| 2151 | return syms[mid]; |
| 2152 | } |
| 2153 | } |
| 2154 | else |
| 2155 | { |
| 2156 | while (lo < hi) |
| 2157 | { |
| 2158 | mid = (lo + hi) >> 1; |
| 2159 | if (syms[mid]->section->id < id) |
| 2160 | lo = mid + 1; |
| 2161 | else if (syms[mid]->section->id > id) |
| 2162 | hi = mid; |
| 2163 | else if (syms[mid]->value < value) |
| 2164 | lo = mid + 1; |
| 2165 | else if (syms[mid]->value > value) |
| 2166 | hi = mid; |
| 2167 | else |
| 2168 | return syms[mid]; |
| 2169 | } |
| 2170 | } |
| 2171 | return NULL; |
| 2172 | } |
| 2173 | |
| 2174 | static bfd_boolean |
| 2175 | section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr) |
| 2176 | { |
| 2177 | bfd_vma vma = *(bfd_vma *) ptr; |
| 2178 | return ((section->flags & SEC_ALLOC) != 0 |
| 2179 | && section->vma <= vma |
| 2180 | && vma < section->vma + section->size); |
| 2181 | } |
| 2182 | |
| 2183 | /* Create synthetic symbols, effectively restoring "dot-symbol" function |
| 2184 | entry syms. Also generate @plt symbols for the glink branch table. |
| 2185 | Returns count of synthetic symbols in RET or -1 on error. */ |
| 2186 | |
| 2187 | static long |
| 2188 | ppc64_elf_get_synthetic_symtab (bfd *abfd, |
| 2189 | long static_count, asymbol **static_syms, |
| 2190 | long dyn_count, asymbol **dyn_syms, |
| 2191 | asymbol **ret) |
| 2192 | { |
| 2193 | asymbol *s; |
| 2194 | size_t i, j, count; |
| 2195 | char *names; |
| 2196 | size_t symcount, codesecsym, codesecsymend, secsymend, opdsymend; |
| 2197 | asection *opd = NULL; |
| 2198 | bfd_boolean relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0; |
| 2199 | asymbol **syms; |
| 2200 | int abi = abiversion (abfd); |
| 2201 | |
| 2202 | *ret = NULL; |
| 2203 | |
| 2204 | if (abi < 2) |
| 2205 | { |
| 2206 | opd = bfd_get_section_by_name (abfd, ".opd"); |
| 2207 | if (opd == NULL && abi == 1) |
| 2208 | return 0; |
| 2209 | } |
| 2210 | |
| 2211 | syms = NULL; |
| 2212 | codesecsym = 0; |
| 2213 | codesecsymend = 0; |
| 2214 | secsymend = 0; |
| 2215 | opdsymend = 0; |
| 2216 | symcount = 0; |
| 2217 | if (opd != NULL) |
| 2218 | { |
| 2219 | symcount = static_count; |
| 2220 | if (!relocatable) |
| 2221 | symcount += dyn_count; |
| 2222 | if (symcount == 0) |
| 2223 | return 0; |
| 2224 | |
| 2225 | syms = bfd_malloc ((symcount + 1) * sizeof (*syms)); |
| 2226 | if (syms == NULL) |
| 2227 | return -1; |
| 2228 | |
| 2229 | if (!relocatable && static_count != 0 && dyn_count != 0) |
| 2230 | { |
| 2231 | /* Use both symbol tables. */ |
| 2232 | memcpy (syms, static_syms, static_count * sizeof (*syms)); |
| 2233 | memcpy (syms + static_count, dyn_syms, |
| 2234 | (dyn_count + 1) * sizeof (*syms)); |
| 2235 | } |
| 2236 | else if (!relocatable && static_count == 0) |
| 2237 | memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms)); |
| 2238 | else |
| 2239 | memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms)); |
| 2240 | |
| 2241 | /* Trim uninteresting symbols. Interesting symbols are section, |
| 2242 | function, and notype symbols. */ |
| 2243 | for (i = 0, j = 0; i < symcount; ++i) |
| 2244 | if ((syms[i]->flags & (BSF_FILE | BSF_OBJECT | BSF_THREAD_LOCAL |
| 2245 | | BSF_RELC | BSF_SRELC)) == 0) |
| 2246 | syms[j++] = syms[i]; |
| 2247 | symcount = j; |
| 2248 | |
| 2249 | synthetic_relocatable = relocatable; |
| 2250 | synthetic_opd = opd; |
| 2251 | qsort (syms, symcount, sizeof (*syms), compare_symbols); |
| 2252 | |
| 2253 | if (!relocatable && symcount > 1) |
| 2254 | { |
| 2255 | /* Trim duplicate syms, since we may have merged the normal |
| 2256 | and dynamic symbols. Actually, we only care about syms |
| 2257 | that have different values, so trim any with the same |
| 2258 | value. Don't consider ifunc and ifunc resolver symbols |
| 2259 | duplicates however, because GDB wants to know whether a |
| 2260 | text symbol is an ifunc resolver. */ |
| 2261 | for (i = 1, j = 1; i < symcount; ++i) |
| 2262 | { |
| 2263 | const asymbol *s0 = syms[i - 1]; |
| 2264 | const asymbol *s1 = syms[i]; |
| 2265 | |
| 2266 | if ((s0->value + s0->section->vma |
| 2267 | != s1->value + s1->section->vma) |
| 2268 | || ((s0->flags & BSF_GNU_INDIRECT_FUNCTION) |
| 2269 | != (s1->flags & BSF_GNU_INDIRECT_FUNCTION))) |
| 2270 | syms[j++] = syms[i]; |
| 2271 | } |
| 2272 | symcount = j; |
| 2273 | } |
| 2274 | |
| 2275 | i = 0; |
| 2276 | /* Note that here and in compare_symbols we can't compare opd and |
| 2277 | sym->section directly. With separate debug info files, the |
| 2278 | symbols will be extracted from the debug file while abfd passed |
| 2279 | to this function is the real binary. */ |
| 2280 | if (strcmp (syms[i]->section->name, ".opd") == 0) |
| 2281 | ++i; |
| 2282 | codesecsym = i; |
| 2283 | |
| 2284 | for (; i < symcount; ++i) |
| 2285 | if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC |
| 2286 | | SEC_THREAD_LOCAL)) |
| 2287 | != (SEC_CODE | SEC_ALLOC)) |
| 2288 | || (syms[i]->flags & BSF_SECTION_SYM) == 0) |
| 2289 | break; |
| 2290 | codesecsymend = i; |
| 2291 | |
| 2292 | for (; i < symcount; ++i) |
| 2293 | if ((syms[i]->flags & BSF_SECTION_SYM) == 0) |
| 2294 | break; |
| 2295 | secsymend = i; |
| 2296 | |
| 2297 | for (; i < symcount; ++i) |
| 2298 | if (strcmp (syms[i]->section->name, ".opd") != 0) |
| 2299 | break; |
| 2300 | opdsymend = i; |
| 2301 | |
| 2302 | for (; i < symcount; ++i) |
| 2303 | if (((syms[i]->section->flags |
| 2304 | & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))) |
| 2305 | != (SEC_CODE | SEC_ALLOC)) |
| 2306 | break; |
| 2307 | symcount = i; |
| 2308 | } |
| 2309 | count = 0; |
| 2310 | |
| 2311 | if (relocatable) |
| 2312 | { |
| 2313 | bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean); |
| 2314 | arelent *r; |
| 2315 | size_t size; |
| 2316 | size_t relcount; |
| 2317 | |
| 2318 | if (opdsymend == secsymend) |
| 2319 | goto done; |
| 2320 | |
| 2321 | slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table; |
| 2322 | relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0; |
| 2323 | if (relcount == 0) |
| 2324 | goto done; |
| 2325 | |
| 2326 | if (!(*slurp_relocs) (abfd, opd, static_syms, FALSE)) |
| 2327 | { |
| 2328 | count = -1; |
| 2329 | goto done; |
| 2330 | } |
| 2331 | |
| 2332 | size = 0; |
| 2333 | for (i = secsymend, r = opd->relocation; i < opdsymend; ++i) |
| 2334 | { |
| 2335 | asymbol *sym; |
| 2336 | |
| 2337 | while (r < opd->relocation + relcount |
| 2338 | && r->address < syms[i]->value + opd->vma) |
| 2339 | ++r; |
| 2340 | |
| 2341 | if (r == opd->relocation + relcount) |
| 2342 | break; |
| 2343 | |
| 2344 | if (r->address != syms[i]->value + opd->vma) |
| 2345 | continue; |
| 2346 | |
| 2347 | if (r->howto->type != R_PPC64_ADDR64) |
| 2348 | continue; |
| 2349 | |
| 2350 | sym = *r->sym_ptr_ptr; |
| 2351 | if (!sym_exists_at (syms, opdsymend, symcount, |
| 2352 | sym->section->id, sym->value + r->addend)) |
| 2353 | { |
| 2354 | ++count; |
| 2355 | size += sizeof (asymbol); |
| 2356 | size += strlen (syms[i]->name) + 2; |
| 2357 | } |
| 2358 | } |
| 2359 | |
| 2360 | if (size == 0) |
| 2361 | goto done; |
| 2362 | s = *ret = bfd_malloc (size); |
| 2363 | if (s == NULL) |
| 2364 | { |
| 2365 | count = -1; |
| 2366 | goto done; |
| 2367 | } |
| 2368 | |
| 2369 | names = (char *) (s + count); |
| 2370 | |
| 2371 | for (i = secsymend, r = opd->relocation; i < opdsymend; ++i) |
| 2372 | { |
| 2373 | asymbol *sym; |
| 2374 | |
| 2375 | while (r < opd->relocation + relcount |
| 2376 | && r->address < syms[i]->value + opd->vma) |
| 2377 | ++r; |
| 2378 | |
| 2379 | if (r == opd->relocation + relcount) |
| 2380 | break; |
| 2381 | |
| 2382 | if (r->address != syms[i]->value + opd->vma) |
| 2383 | continue; |
| 2384 | |
| 2385 | if (r->howto->type != R_PPC64_ADDR64) |
| 2386 | continue; |
| 2387 | |
| 2388 | sym = *r->sym_ptr_ptr; |
| 2389 | if (!sym_exists_at (syms, opdsymend, symcount, |
| 2390 | sym->section->id, sym->value + r->addend)) |
| 2391 | { |
| 2392 | size_t len; |
| 2393 | |
| 2394 | *s = *syms[i]; |
| 2395 | s->flags |= BSF_SYNTHETIC; |
| 2396 | s->section = sym->section; |
| 2397 | s->value = sym->value + r->addend; |
| 2398 | s->name = names; |
| 2399 | *names++ = '.'; |
| 2400 | len = strlen (syms[i]->name); |
| 2401 | memcpy (names, syms[i]->name, len + 1); |
| 2402 | names += len + 1; |
| 2403 | /* Have udata.p point back to the original symbol this |
| 2404 | synthetic symbol was derived from. */ |
| 2405 | s->udata.p = syms[i]; |
| 2406 | s++; |
| 2407 | } |
| 2408 | } |
| 2409 | } |
| 2410 | else |
| 2411 | { |
| 2412 | bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean); |
| 2413 | bfd_byte *contents = NULL; |
| 2414 | size_t size; |
| 2415 | size_t plt_count = 0; |
| 2416 | bfd_vma glink_vma = 0, resolv_vma = 0; |
| 2417 | asection *dynamic, *glink = NULL, *relplt = NULL; |
| 2418 | arelent *p; |
| 2419 | |
| 2420 | if (opd != NULL && !bfd_malloc_and_get_section (abfd, opd, &contents)) |
| 2421 | { |
| 2422 | free_contents_and_exit_err: |
| 2423 | count = -1; |
| 2424 | free_contents_and_exit: |
| 2425 | free (contents); |
| 2426 | goto done; |
| 2427 | } |
| 2428 | |
| 2429 | size = 0; |
| 2430 | for (i = secsymend; i < opdsymend; ++i) |
| 2431 | { |
| 2432 | bfd_vma ent; |
| 2433 | |
| 2434 | /* Ignore bogus symbols. */ |
| 2435 | if (syms[i]->value > opd->size - 8) |
| 2436 | continue; |
| 2437 | |
| 2438 | ent = bfd_get_64 (abfd, contents + syms[i]->value); |
| 2439 | if (!sym_exists_at (syms, opdsymend, symcount, -1, ent)) |
| 2440 | { |
| 2441 | ++count; |
| 2442 | size += sizeof (asymbol); |
| 2443 | size += strlen (syms[i]->name) + 2; |
| 2444 | } |
| 2445 | } |
| 2446 | |
| 2447 | /* Get start of .glink stubs from DT_PPC64_GLINK. */ |
| 2448 | if (dyn_count != 0 |
| 2449 | && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL) |
| 2450 | { |
| 2451 | bfd_byte *dynbuf, *extdyn, *extdynend; |
| 2452 | size_t extdynsize; |
| 2453 | void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *); |
| 2454 | |
| 2455 | if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf)) |
| 2456 | goto free_contents_and_exit_err; |
| 2457 | |
| 2458 | extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn; |
| 2459 | swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in; |
| 2460 | |
| 2461 | extdyn = dynbuf; |
| 2462 | extdynend = extdyn + dynamic->size; |
| 2463 | for (; extdyn < extdynend; extdyn += extdynsize) |
| 2464 | { |
| 2465 | Elf_Internal_Dyn dyn; |
| 2466 | (*swap_dyn_in) (abfd, extdyn, &dyn); |
| 2467 | |
| 2468 | if (dyn.d_tag == DT_NULL) |
| 2469 | break; |
| 2470 | |
| 2471 | if (dyn.d_tag == DT_PPC64_GLINK) |
| 2472 | { |
| 2473 | /* The first glink stub starts at DT_PPC64_GLINK plus 32. |
| 2474 | See comment in ppc64_elf_finish_dynamic_sections. */ |
| 2475 | glink_vma = dyn.d_un.d_val + 8 * 4; |
| 2476 | /* The .glink section usually does not survive the final |
| 2477 | link; search for the section (usually .text) where the |
| 2478 | glink stubs now reside. */ |
| 2479 | glink = bfd_sections_find_if (abfd, section_covers_vma, |
| 2480 | &glink_vma); |
| 2481 | break; |
| 2482 | } |
| 2483 | } |
| 2484 | |
| 2485 | free (dynbuf); |
| 2486 | } |
| 2487 | |
| 2488 | if (glink != NULL) |
| 2489 | { |
| 2490 | /* Determine __glink trampoline by reading the relative branch |
| 2491 | from the first glink stub. */ |
| 2492 | bfd_byte buf[4]; |
| 2493 | unsigned int off = 0; |
| 2494 | |
| 2495 | while (bfd_get_section_contents (abfd, glink, buf, |
| 2496 | glink_vma + off - glink->vma, 4)) |
| 2497 | { |
| 2498 | unsigned int insn = bfd_get_32 (abfd, buf); |
| 2499 | insn ^= B_DOT; |
| 2500 | if ((insn & ~0x3fffffc) == 0) |
| 2501 | { |
| 2502 | resolv_vma |
| 2503 | = glink_vma + off + (insn ^ 0x2000000) - 0x2000000; |
| 2504 | break; |
| 2505 | } |
| 2506 | off += 4; |
| 2507 | if (off > 4) |
| 2508 | break; |
| 2509 | } |
| 2510 | |
| 2511 | if (resolv_vma) |
| 2512 | size += sizeof (asymbol) + sizeof ("__glink_PLTresolve"); |
| 2513 | |
| 2514 | relplt = bfd_get_section_by_name (abfd, ".rela.plt"); |
| 2515 | if (relplt != NULL) |
| 2516 | { |
| 2517 | slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table; |
| 2518 | if (!(*slurp_relocs) (abfd, relplt, dyn_syms, TRUE)) |
| 2519 | goto free_contents_and_exit_err; |
| 2520 | |
| 2521 | plt_count = relplt->size / sizeof (Elf64_External_Rela); |
| 2522 | size += plt_count * sizeof (asymbol); |
| 2523 | |
| 2524 | p = relplt->relocation; |
| 2525 | for (i = 0; i < plt_count; i++, p++) |
| 2526 | { |
| 2527 | size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt"); |
| 2528 | if (p->addend != 0) |
| 2529 | size += sizeof ("+0x") - 1 + 16; |
| 2530 | } |
| 2531 | } |
| 2532 | } |
| 2533 | |
| 2534 | if (size == 0) |
| 2535 | goto free_contents_and_exit; |
| 2536 | s = *ret = bfd_malloc (size); |
| 2537 | if (s == NULL) |
| 2538 | goto free_contents_and_exit_err; |
| 2539 | |
| 2540 | names = (char *) (s + count + plt_count + (resolv_vma != 0)); |
| 2541 | |
| 2542 | for (i = secsymend; i < opdsymend; ++i) |
| 2543 | { |
| 2544 | bfd_vma ent; |
| 2545 | |
| 2546 | if (syms[i]->value > opd->size - 8) |
| 2547 | continue; |
| 2548 | |
| 2549 | ent = bfd_get_64 (abfd, contents + syms[i]->value); |
| 2550 | if (!sym_exists_at (syms, opdsymend, symcount, -1, ent)) |
| 2551 | { |
| 2552 | size_t lo, hi; |
| 2553 | size_t len; |
| 2554 | asection *sec = abfd->sections; |
| 2555 | |
| 2556 | *s = *syms[i]; |
| 2557 | lo = codesecsym; |
| 2558 | hi = codesecsymend; |
| 2559 | while (lo < hi) |
| 2560 | { |
| 2561 | size_t mid = (lo + hi) >> 1; |
| 2562 | if (syms[mid]->section->vma < ent) |
| 2563 | lo = mid + 1; |
| 2564 | else if (syms[mid]->section->vma > ent) |
| 2565 | hi = mid; |
| 2566 | else |
| 2567 | { |
| 2568 | sec = syms[mid]->section; |
| 2569 | break; |
| 2570 | } |
| 2571 | } |
| 2572 | |
| 2573 | if (lo >= hi && lo > codesecsym) |
| 2574 | sec = syms[lo - 1]->section; |
| 2575 | |
| 2576 | for (; sec != NULL; sec = sec->next) |
| 2577 | { |
| 2578 | if (sec->vma > ent) |
| 2579 | break; |
| 2580 | /* SEC_LOAD may not be set if SEC is from a separate debug |
| 2581 | info file. */ |
| 2582 | if ((sec->flags & SEC_ALLOC) == 0) |
| 2583 | break; |
| 2584 | if ((sec->flags & SEC_CODE) != 0) |
| 2585 | s->section = sec; |
| 2586 | } |
| 2587 | s->flags |= BSF_SYNTHETIC; |
| 2588 | s->value = ent - s->section->vma; |
| 2589 | s->name = names; |
| 2590 | *names++ = '.'; |
| 2591 | len = strlen (syms[i]->name); |
| 2592 | memcpy (names, syms[i]->name, len + 1); |
| 2593 | names += len + 1; |
| 2594 | /* Have udata.p point back to the original symbol this |
| 2595 | synthetic symbol was derived from. */ |
| 2596 | s->udata.p = syms[i]; |
| 2597 | s++; |
| 2598 | } |
| 2599 | } |
| 2600 | free (contents); |
| 2601 | |
| 2602 | if (glink != NULL && relplt != NULL) |
| 2603 | { |
| 2604 | if (resolv_vma) |
| 2605 | { |
| 2606 | /* Add a symbol for the main glink trampoline. */ |
| 2607 | memset (s, 0, sizeof *s); |
| 2608 | s->the_bfd = abfd; |
| 2609 | s->flags = BSF_GLOBAL | BSF_SYNTHETIC; |
| 2610 | s->section = glink; |
| 2611 | s->value = resolv_vma - glink->vma; |
| 2612 | s->name = names; |
| 2613 | memcpy (names, "__glink_PLTresolve", |
| 2614 | sizeof ("__glink_PLTresolve")); |
| 2615 | names += sizeof ("__glink_PLTresolve"); |
| 2616 | s++; |
| 2617 | count++; |
| 2618 | } |
| 2619 | |
| 2620 | /* FIXME: It would be very much nicer to put sym@plt on the |
| 2621 | stub rather than on the glink branch table entry. The |
| 2622 | objdump disassembler would then use a sensible symbol |
| 2623 | name on plt calls. The difficulty in doing so is |
| 2624 | a) finding the stubs, and, |
| 2625 | b) matching stubs against plt entries, and, |
| 2626 | c) there can be multiple stubs for a given plt entry. |
| 2627 | |
| 2628 | Solving (a) could be done by code scanning, but older |
| 2629 | ppc64 binaries used different stubs to current code. |
| 2630 | (b) is the tricky one since you need to known the toc |
| 2631 | pointer for at least one function that uses a pic stub to |
| 2632 | be able to calculate the plt address referenced. |
| 2633 | (c) means gdb would need to set multiple breakpoints (or |
| 2634 | find the glink branch itself) when setting breakpoints |
| 2635 | for pending shared library loads. */ |
| 2636 | p = relplt->relocation; |
| 2637 | for (i = 0; i < plt_count; i++, p++) |
| 2638 | { |
| 2639 | size_t len; |
| 2640 | |
| 2641 | *s = **p->sym_ptr_ptr; |
| 2642 | /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since |
| 2643 | we are defining a symbol, ensure one of them is set. */ |
| 2644 | if ((s->flags & BSF_LOCAL) == 0) |
| 2645 | s->flags |= BSF_GLOBAL; |
| 2646 | s->flags |= BSF_SYNTHETIC; |
| 2647 | s->section = glink; |
| 2648 | s->value = glink_vma - glink->vma; |
| 2649 | s->name = names; |
| 2650 | s->udata.p = NULL; |
| 2651 | len = strlen ((*p->sym_ptr_ptr)->name); |
| 2652 | memcpy (names, (*p->sym_ptr_ptr)->name, len); |
| 2653 | names += len; |
| 2654 | if (p->addend != 0) |
| 2655 | { |
| 2656 | memcpy (names, "+0x", sizeof ("+0x") - 1); |
| 2657 | names += sizeof ("+0x") - 1; |
| 2658 | bfd_sprintf_vma (abfd, names, p->addend); |
| 2659 | names += strlen (names); |
| 2660 | } |
| 2661 | memcpy (names, "@plt", sizeof ("@plt")); |
| 2662 | names += sizeof ("@plt"); |
| 2663 | s++; |
| 2664 | if (abi < 2) |
| 2665 | { |
| 2666 | glink_vma += 8; |
| 2667 | if (i >= 0x8000) |
| 2668 | glink_vma += 4; |
| 2669 | } |
| 2670 | else |
| 2671 | glink_vma += 4; |
| 2672 | } |
| 2673 | count += plt_count; |
| 2674 | } |
| 2675 | } |
| 2676 | |
| 2677 | done: |
| 2678 | free (syms); |
| 2679 | return count; |
| 2680 | } |
| 2681 | \f |
| 2682 | /* The following functions are specific to the ELF linker, while |
| 2683 | functions above are used generally. Those named ppc64_elf_* are |
| 2684 | called by the main ELF linker code. They appear in this file more |
| 2685 | or less in the order in which they are called. eg. |
| 2686 | ppc64_elf_check_relocs is called early in the link process, |
| 2687 | ppc64_elf_finish_dynamic_sections is one of the last functions |
| 2688 | called. |
| 2689 | |
| 2690 | PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that |
| 2691 | functions have both a function code symbol and a function descriptor |
| 2692 | symbol. A call to foo in a relocatable object file looks like: |
| 2693 | |
| 2694 | . .text |
| 2695 | . x: |
| 2696 | . bl .foo |
| 2697 | . nop |
| 2698 | |
| 2699 | The function definition in another object file might be: |
| 2700 | |
| 2701 | . .section .opd |
| 2702 | . foo: .quad .foo |
| 2703 | . .quad .TOC.@tocbase |
| 2704 | . .quad 0 |
| 2705 | . |
| 2706 | . .text |
| 2707 | . .foo: blr |
| 2708 | |
| 2709 | When the linker resolves the call during a static link, the branch |
| 2710 | unsurprisingly just goes to .foo and the .opd information is unused. |
| 2711 | If the function definition is in a shared library, things are a little |
| 2712 | different: The call goes via a plt call stub, the opd information gets |
| 2713 | copied to the plt, and the linker patches the nop. |
| 2714 | |
| 2715 | . x: |
| 2716 | . bl .foo_stub |
| 2717 | . ld 2,40(1) |
| 2718 | . |
| 2719 | . |
| 2720 | . .foo_stub: |
| 2721 | . std 2,40(1) # in practice, the call stub |
| 2722 | . addis 11,2,Lfoo@toc@ha # is slightly optimized, but |
| 2723 | . addi 11,11,Lfoo@toc@l # this is the general idea |
| 2724 | . ld 12,0(11) |
| 2725 | . ld 2,8(11) |
| 2726 | . mtctr 12 |
| 2727 | . ld 11,16(11) |
| 2728 | . bctr |
| 2729 | . |
| 2730 | . .section .plt |
| 2731 | . Lfoo: reloc (R_PPC64_JMP_SLOT, foo) |
| 2732 | |
| 2733 | The "reloc ()" notation is supposed to indicate that the linker emits |
| 2734 | an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd |
| 2735 | copying. |
| 2736 | |
| 2737 | What are the difficulties here? Well, firstly, the relocations |
| 2738 | examined by the linker in check_relocs are against the function code |
| 2739 | sym .foo, while the dynamic relocation in the plt is emitted against |
| 2740 | the function descriptor symbol, foo. Somewhere along the line, we need |
| 2741 | to carefully copy dynamic link information from one symbol to the other. |
| 2742 | Secondly, the generic part of the elf linker will make .foo a dynamic |
| 2743 | symbol as is normal for most other backends. We need foo dynamic |
| 2744 | instead, at least for an application final link. However, when |
| 2745 | creating a shared library containing foo, we need to have both symbols |
| 2746 | dynamic so that references to .foo are satisfied during the early |
| 2747 | stages of linking. Otherwise the linker might decide to pull in a |
| 2748 | definition from some other object, eg. a static library. |
| 2749 | |
| 2750 | Update: As of August 2004, we support a new convention. Function |
| 2751 | calls may use the function descriptor symbol, ie. "bl foo". This |
| 2752 | behaves exactly as "bl .foo". */ |
| 2753 | |
| 2754 | /* Of those relocs that might be copied as dynamic relocs, this |
| 2755 | function selects those that must be copied when linking a shared |
| 2756 | library or PIE, even when the symbol is local. */ |
| 2757 | |
| 2758 | static int |
| 2759 | must_be_dyn_reloc (struct bfd_link_info *info, |
| 2760 | enum elf_ppc64_reloc_type r_type) |
| 2761 | { |
| 2762 | switch (r_type) |
| 2763 | { |
| 2764 | default: |
| 2765 | /* Only relative relocs can be resolved when the object load |
| 2766 | address isn't fixed. DTPREL64 is excluded because the |
| 2767 | dynamic linker needs to differentiate global dynamic from |
| 2768 | local dynamic __tls_index pairs when PPC64_OPT_TLS is set. */ |
| 2769 | return 1; |
| 2770 | |
| 2771 | case R_PPC64_REL32: |
| 2772 | case R_PPC64_REL64: |
| 2773 | case R_PPC64_REL30: |
| 2774 | case R_PPC64_TOC16: |
| 2775 | case R_PPC64_TOC16_DS: |
| 2776 | case R_PPC64_TOC16_LO: |
| 2777 | case R_PPC64_TOC16_HI: |
| 2778 | case R_PPC64_TOC16_HA: |
| 2779 | case R_PPC64_TOC16_LO_DS: |
| 2780 | return 0; |
| 2781 | |
| 2782 | case R_PPC64_TPREL16: |
| 2783 | case R_PPC64_TPREL16_LO: |
| 2784 | case R_PPC64_TPREL16_HI: |
| 2785 | case R_PPC64_TPREL16_HA: |
| 2786 | case R_PPC64_TPREL16_DS: |
| 2787 | case R_PPC64_TPREL16_LO_DS: |
| 2788 | case R_PPC64_TPREL16_HIGH: |
| 2789 | case R_PPC64_TPREL16_HIGHA: |
| 2790 | case R_PPC64_TPREL16_HIGHER: |
| 2791 | case R_PPC64_TPREL16_HIGHERA: |
| 2792 | case R_PPC64_TPREL16_HIGHEST: |
| 2793 | case R_PPC64_TPREL16_HIGHESTA: |
| 2794 | case R_PPC64_TPREL64: |
| 2795 | case R_PPC64_TPREL34: |
| 2796 | /* These relocations are relative but in a shared library the |
| 2797 | linker doesn't know the thread pointer base. */ |
| 2798 | return bfd_link_dll (info); |
| 2799 | } |
| 2800 | } |
| 2801 | |
| 2802 | /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid |
| 2803 | copying dynamic variables from a shared lib into an app's .dynbss |
| 2804 | section, and instead use a dynamic relocation to point into the |
| 2805 | shared lib. With code that gcc generates it is vital that this be |
| 2806 | enabled; In the PowerPC64 ELFv1 ABI the address of a function is |
| 2807 | actually the address of a function descriptor which resides in the |
| 2808 | .opd section. gcc uses the descriptor directly rather than going |
| 2809 | via the GOT as some other ABIs do, which means that initialized |
| 2810 | function pointers reference the descriptor. Thus, a function |
| 2811 | pointer initialized to the address of a function in a shared |
| 2812 | library will either require a .dynbss copy and a copy reloc, or a |
| 2813 | dynamic reloc. Using a .dynbss copy redefines the function |
| 2814 | descriptor symbol to point to the copy. This presents a problem as |
| 2815 | a PLT entry for that function is also initialized from the function |
| 2816 | descriptor symbol and the copy may not be initialized first. */ |
| 2817 | #define ELIMINATE_COPY_RELOCS 1 |
| 2818 | |
| 2819 | /* Section name for stubs is the associated section name plus this |
| 2820 | string. */ |
| 2821 | #define STUB_SUFFIX ".stub" |
| 2822 | |
| 2823 | /* Linker stubs. |
| 2824 | ppc_stub_long_branch: |
| 2825 | Used when a 14 bit branch (or even a 24 bit branch) can't reach its |
| 2826 | destination, but a 24 bit branch in a stub section will reach. |
| 2827 | . b dest |
| 2828 | |
| 2829 | ppc_stub_plt_branch: |
| 2830 | Similar to the above, but a 24 bit branch in the stub section won't |
| 2831 | reach its destination. |
| 2832 | . addis %r12,%r2,xxx@toc@ha |
| 2833 | . ld %r12,xxx@toc@l(%r12) |
| 2834 | . mtctr %r12 |
| 2835 | . bctr |
| 2836 | |
| 2837 | ppc_stub_plt_call: |
| 2838 | Used to call a function in a shared library. If it so happens that |
| 2839 | the plt entry referenced crosses a 64k boundary, then an extra |
| 2840 | "addi %r11,%r11,xxx@toc@l" will be inserted before the "mtctr". |
| 2841 | ppc_stub_plt_call_r2save starts with "std %r2,40(%r1)". |
| 2842 | . addis %r11,%r2,xxx@toc@ha |
| 2843 | . ld %r12,xxx+0@toc@l(%r11) |
| 2844 | . mtctr %r12 |
| 2845 | . ld %r2,xxx+8@toc@l(%r11) |
| 2846 | . ld %r11,xxx+16@toc@l(%r11) |
| 2847 | . bctr |
| 2848 | |
| 2849 | ppc_stub_long_branch and ppc_stub_plt_branch may also have additional |
| 2850 | code to adjust the value and save r2 to support multiple toc sections. |
| 2851 | A ppc_stub_long_branch with an r2 offset looks like: |
| 2852 | . std %r2,40(%r1) |
| 2853 | . addis %r2,%r2,off@ha |
| 2854 | . addi %r2,%r2,off@l |
| 2855 | . b dest |
| 2856 | |
| 2857 | A ppc_stub_plt_branch with an r2 offset looks like: |
| 2858 | . std %r2,40(%r1) |
| 2859 | . addis %r12,%r2,xxx@toc@ha |
| 2860 | . ld %r12,xxx@toc@l(%r12) |
| 2861 | . addis %r2,%r2,off@ha |
| 2862 | . addi %r2,%r2,off@l |
| 2863 | . mtctr %r12 |
| 2864 | . bctr |
| 2865 | |
| 2866 | All of the above stubs are shown as their ELFv1 variants. ELFv2 |
| 2867 | variants exist too, simpler for plt calls since a new toc pointer |
| 2868 | and static chain are not loaded by the stub. In addition, ELFv2 |
| 2869 | has some more complex stubs to handle calls marked with NOTOC |
| 2870 | relocs from functions where r2 is not a valid toc pointer. These |
| 2871 | come in two flavours, the ones shown below, and _both variants that |
| 2872 | start with "std %r2,24(%r1)" to save r2 in the unlikely event that |
| 2873 | one call is from a function where r2 is used as the toc pointer but |
| 2874 | needs a toc adjusting stub for small-model multi-toc, and another |
| 2875 | call is from a function where r2 is not valid. |
| 2876 | ppc_stub_long_branch_notoc: |
| 2877 | . mflr %r12 |
| 2878 | . bcl 20,31,1f |
| 2879 | . 1: |
| 2880 | . mflr %r11 |
| 2881 | . mtlr %r12 |
| 2882 | . addis %r12,%r11,dest-1b@ha |
| 2883 | . addi %r12,%r12,dest-1b@l |
| 2884 | . b dest |
| 2885 | |
| 2886 | ppc_stub_plt_branch_notoc: |
| 2887 | . mflr %r12 |
| 2888 | . bcl 20,31,1f |
| 2889 | . 1: |
| 2890 | . mflr %r11 |
| 2891 | . mtlr %r12 |
| 2892 | . lis %r12,xxx-1b@highest |
| 2893 | . ori %r12,%r12,xxx-1b@higher |
| 2894 | . sldi %r12,%r12,32 |
| 2895 | . oris %r12,%r12,xxx-1b@high |
| 2896 | . ori %r12,%r12,xxx-1b@l |
| 2897 | . add %r12,%r11,%r12 |
| 2898 | . mtctr %r12 |
| 2899 | . bctr |
| 2900 | |
| 2901 | ppc_stub_plt_call_notoc: |
| 2902 | . mflr %r12 |
| 2903 | . bcl 20,31,1f |
| 2904 | . 1: |
| 2905 | . mflr %r11 |
| 2906 | . mtlr %r12 |
| 2907 | . lis %r12,xxx-1b@highest |
| 2908 | . ori %r12,%r12,xxx-1b@higher |
| 2909 | . sldi %r12,%r12,32 |
| 2910 | . oris %r12,%r12,xxx-1b@high |
| 2911 | . ori %r12,%r12,xxx-1b@l |
| 2912 | . ldx %r12,%r11,%r12 |
| 2913 | . mtctr %r12 |
| 2914 | . bctr |
| 2915 | |
| 2916 | There are also ELFv1 power10 variants of these stubs. |
| 2917 | ppc_stub_long_branch_notoc: |
| 2918 | . pla %r12,dest@pcrel |
| 2919 | . b dest |
| 2920 | ppc_stub_plt_branch_notoc: |
| 2921 | . lis %r11,(dest-1f)@highesta34 |
| 2922 | . ori %r11,%r11,(dest-1f)@highera34 |
| 2923 | . sldi %r11,%r11,34 |
| 2924 | . 1: pla %r12,dest@pcrel |
| 2925 | . add %r12,%r11,%r12 |
| 2926 | . mtctr %r12 |
| 2927 | . bctr |
| 2928 | ppc_stub_plt_call_notoc: |
| 2929 | . lis %r11,(xxx-1f)@highesta34 |
| 2930 | . ori %r11,%r11,(xxx-1f)@highera34 |
| 2931 | . sldi %r11,%r11,34 |
| 2932 | . 1: pla %r12,xxx@pcrel |
| 2933 | . ldx %r12,%r11,%r12 |
| 2934 | . mtctr %r12 |
| 2935 | . bctr |
| 2936 | |
| 2937 | In cases where the high instructions would add zero, they are |
| 2938 | omitted and following instructions modified in some cases. |
| 2939 | For example, a power10 ppc_stub_plt_call_notoc might simplify down |
| 2940 | to |
| 2941 | . pld %r12,xxx@pcrel |
| 2942 | . mtctr %r12 |
| 2943 | . bctr |
| 2944 | |
| 2945 | For a given stub group (a set of sections all using the same toc |
| 2946 | pointer value) there will be just one stub type used for any |
| 2947 | particular function symbol. For example, if printf is called from |
| 2948 | code with the tocsave optimization (ie. r2 saved in function |
| 2949 | prologue) and therefore calls use a ppc_stub_plt_call linkage stub, |
| 2950 | and from other code without the tocsave optimization requiring a |
| 2951 | ppc_stub_plt_call_r2save linkage stub, a single stub of the latter |
| 2952 | type will be created. Calls with the tocsave optimization will |
| 2953 | enter this stub after the instruction saving r2. A similar |
| 2954 | situation exists when calls are marked with R_PPC64_REL24_NOTOC |
| 2955 | relocations. These require a ppc_stub_plt_call_notoc linkage stub |
| 2956 | to call an external function like printf. If other calls to printf |
| 2957 | require a ppc_stub_plt_call linkage stub then a single |
| 2958 | ppc_stub_plt_call_notoc linkage stub will be used for both types of |
| 2959 | call. If other calls to printf require a ppc_stub_plt_call_r2save |
| 2960 | linkage stub then a single ppc_stub_plt_call_both linkage stub will |
| 2961 | be created and calls not requiring r2 to be saved will enter the |
| 2962 | stub after the r2 save instruction. There is an analogous |
| 2963 | hierarchy of long branch and plt branch stubs for local call |
| 2964 | linkage. */ |
| 2965 | |
| 2966 | enum ppc_stub_type |
| 2967 | { |
| 2968 | ppc_stub_none, |
| 2969 | ppc_stub_long_branch, |
| 2970 | ppc_stub_long_branch_r2off, |
| 2971 | ppc_stub_long_branch_notoc, |
| 2972 | ppc_stub_long_branch_both, /* r2off and notoc variants both needed. */ |
| 2973 | ppc_stub_plt_branch, |
| 2974 | ppc_stub_plt_branch_r2off, |
| 2975 | ppc_stub_plt_branch_notoc, |
| 2976 | ppc_stub_plt_branch_both, |
| 2977 | ppc_stub_plt_call, |
| 2978 | ppc_stub_plt_call_r2save, |
| 2979 | ppc_stub_plt_call_notoc, |
| 2980 | ppc_stub_plt_call_both, |
| 2981 | ppc_stub_global_entry, |
| 2982 | ppc_stub_save_res |
| 2983 | }; |
| 2984 | |
| 2985 | /* Information on stub grouping. */ |
| 2986 | struct map_stub |
| 2987 | { |
| 2988 | /* The stub section. */ |
| 2989 | asection *stub_sec; |
| 2990 | /* This is the section to which stubs in the group will be attached. */ |
| 2991 | asection *link_sec; |
| 2992 | /* Next group. */ |
| 2993 | struct map_stub *next; |
| 2994 | /* Whether to emit a copy of register save/restore functions in this |
| 2995 | group. */ |
| 2996 | int needs_save_res; |
| 2997 | /* Current offset within stubs after the insn restoring lr in a |
| 2998 | _notoc or _both stub using bcl for pc-relative addressing, or |
| 2999 | after the insn restoring lr in a __tls_get_addr_opt plt stub. */ |
| 3000 | unsigned int lr_restore; |
| 3001 | /* Accumulated size of EH info emitted to describe return address |
| 3002 | if stubs modify lr. Does not include 17 byte FDE header. */ |
| 3003 | unsigned int eh_size; |
| 3004 | /* Offset in glink_eh_frame to the start of EH info for this group. */ |
| 3005 | unsigned int eh_base; |
| 3006 | }; |
| 3007 | |
| 3008 | struct ppc_stub_hash_entry |
| 3009 | { |
| 3010 | /* Base hash table entry structure. */ |
| 3011 | struct bfd_hash_entry root; |
| 3012 | |
| 3013 | enum ppc_stub_type stub_type; |
| 3014 | |
| 3015 | /* Group information. */ |
| 3016 | struct map_stub *group; |
| 3017 | |
| 3018 | /* Offset within stub_sec of the beginning of this stub. */ |
| 3019 | bfd_vma stub_offset; |
| 3020 | |
| 3021 | /* Given the symbol's value and its section we can determine its final |
| 3022 | value when building the stubs (so the stub knows where to jump. */ |
| 3023 | bfd_vma target_value; |
| 3024 | asection *target_section; |
| 3025 | |
| 3026 | /* The symbol table entry, if any, that this was derived from. */ |
| 3027 | struct ppc_link_hash_entry *h; |
| 3028 | struct plt_entry *plt_ent; |
| 3029 | |
| 3030 | /* Symbol type. */ |
| 3031 | unsigned char symtype; |
| 3032 | |
| 3033 | /* Symbol st_other. */ |
| 3034 | unsigned char other; |
| 3035 | }; |
| 3036 | |
| 3037 | struct ppc_branch_hash_entry |
| 3038 | { |
| 3039 | /* Base hash table entry structure. */ |
| 3040 | struct bfd_hash_entry root; |
| 3041 | |
| 3042 | /* Offset within branch lookup table. */ |
| 3043 | unsigned int offset; |
| 3044 | |
| 3045 | /* Generation marker. */ |
| 3046 | unsigned int iter; |
| 3047 | }; |
| 3048 | |
| 3049 | /* Used to track dynamic relocations for local symbols. */ |
| 3050 | struct ppc_dyn_relocs |
| 3051 | { |
| 3052 | struct ppc_dyn_relocs *next; |
| 3053 | |
| 3054 | /* The input section of the reloc. */ |
| 3055 | asection *sec; |
| 3056 | |
| 3057 | /* Total number of relocs copied for the input section. */ |
| 3058 | unsigned int count : 31; |
| 3059 | |
| 3060 | /* Whether this entry is for STT_GNU_IFUNC symbols. */ |
| 3061 | unsigned int ifunc : 1; |
| 3062 | }; |
| 3063 | |
| 3064 | struct ppc_link_hash_entry |
| 3065 | { |
| 3066 | struct elf_link_hash_entry elf; |
| 3067 | |
| 3068 | union |
| 3069 | { |
| 3070 | /* A pointer to the most recently used stub hash entry against this |
| 3071 | symbol. */ |
| 3072 | struct ppc_stub_hash_entry *stub_cache; |
| 3073 | |
| 3074 | /* A pointer to the next symbol starting with a '.' */ |
| 3075 | struct ppc_link_hash_entry *next_dot_sym; |
| 3076 | } u; |
| 3077 | |
| 3078 | /* Link between function code and descriptor symbols. */ |
| 3079 | struct ppc_link_hash_entry *oh; |
| 3080 | |
| 3081 | /* Flag function code and descriptor symbols. */ |
| 3082 | unsigned int is_func:1; |
| 3083 | unsigned int is_func_descriptor:1; |
| 3084 | unsigned int fake:1; |
| 3085 | |
| 3086 | /* Whether global opd/toc sym has been adjusted or not. |
| 3087 | After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag |
| 3088 | should be set for all globals defined in any opd/toc section. */ |
| 3089 | unsigned int adjust_done:1; |
| 3090 | |
| 3091 | /* Set if this is an out-of-line register save/restore function, |
| 3092 | with non-standard calling convention. */ |
| 3093 | unsigned int save_res:1; |
| 3094 | |
| 3095 | /* Set if a duplicate symbol with non-zero localentry is detected, |
| 3096 | even when the duplicate symbol does not provide a definition. */ |
| 3097 | unsigned int non_zero_localentry:1; |
| 3098 | |
| 3099 | /* Contexts in which symbol is used in the GOT (or TOC). |
| 3100 | Bits are or'd into the mask as the corresponding relocs are |
| 3101 | encountered during check_relocs, with TLS_TLS being set when any |
| 3102 | of the other TLS bits are set. tls_optimize clears bits when |
| 3103 | optimizing to indicate the corresponding GOT entry type is not |
| 3104 | needed. If set, TLS_TLS is never cleared. tls_optimize may also |
| 3105 | set TLS_GDIE when a GD reloc turns into an IE one. |
| 3106 | These flags are also kept for local symbols. */ |
| 3107 | #define TLS_TLS 1 /* Any TLS reloc. */ |
| 3108 | #define TLS_GD 2 /* GD reloc. */ |
| 3109 | #define TLS_LD 4 /* LD reloc. */ |
| 3110 | #define TLS_TPREL 8 /* TPREL reloc, => IE. */ |
| 3111 | #define TLS_DTPREL 16 /* DTPREL reloc, => LD. */ |
| 3112 | #define TLS_MARK 32 /* __tls_get_addr call marked. */ |
| 3113 | #define TLS_GDIE 64 /* GOT TPREL reloc resulting from GD->IE. */ |
| 3114 | #define TLS_EXPLICIT 256 /* TOC section TLS reloc, not stored. */ |
| 3115 | unsigned char tls_mask; |
| 3116 | |
| 3117 | /* The above field is also used to mark function symbols. In which |
| 3118 | case TLS_TLS will be 0. */ |
| 3119 | #define PLT_IFUNC 2 /* STT_GNU_IFUNC. */ |
| 3120 | #define PLT_KEEP 4 /* inline plt call requires plt entry. */ |
| 3121 | #define NON_GOT 256 /* local symbol plt, not stored. */ |
| 3122 | }; |
| 3123 | |
| 3124 | static inline struct ppc_link_hash_entry * |
| 3125 | ppc_elf_hash_entry (struct elf_link_hash_entry *ent) |
| 3126 | { |
| 3127 | return (struct ppc_link_hash_entry *) ent; |
| 3128 | } |
| 3129 | |
| 3130 | /* ppc64 ELF linker hash table. */ |
| 3131 | |
| 3132 | struct ppc_link_hash_table |
| 3133 | { |
| 3134 | struct elf_link_hash_table elf; |
| 3135 | |
| 3136 | /* The stub hash table. */ |
| 3137 | struct bfd_hash_table stub_hash_table; |
| 3138 | |
| 3139 | /* Another hash table for plt_branch stubs. */ |
| 3140 | struct bfd_hash_table branch_hash_table; |
| 3141 | |
| 3142 | /* Hash table for function prologue tocsave. */ |
| 3143 | htab_t tocsave_htab; |
| 3144 | |
| 3145 | /* Various options and other info passed from the linker. */ |
| 3146 | struct ppc64_elf_params *params; |
| 3147 | |
| 3148 | /* The size of sec_info below. */ |
| 3149 | unsigned int sec_info_arr_size; |
| 3150 | |
| 3151 | /* Per-section array of extra section info. Done this way rather |
| 3152 | than as part of ppc64_elf_section_data so we have the info for |
| 3153 | non-ppc64 sections. */ |
| 3154 | struct |
| 3155 | { |
| 3156 | /* Along with elf_gp, specifies the TOC pointer used by this section. */ |
| 3157 | bfd_vma toc_off; |
| 3158 | |
| 3159 | union |
| 3160 | { |
| 3161 | /* The section group that this section belongs to. */ |
| 3162 | struct map_stub *group; |
| 3163 | /* A temp section list pointer. */ |
| 3164 | asection *list; |
| 3165 | } u; |
| 3166 | } *sec_info; |
| 3167 | |
| 3168 | /* Linked list of groups. */ |
| 3169 | struct map_stub *group; |
| 3170 | |
| 3171 | /* Temp used when calculating TOC pointers. */ |
| 3172 | bfd_vma toc_curr; |
| 3173 | bfd *toc_bfd; |
| 3174 | asection *toc_first_sec; |
| 3175 | |
| 3176 | /* Used when adding symbols. */ |
| 3177 | struct ppc_link_hash_entry *dot_syms; |
| 3178 | |
| 3179 | /* Shortcuts to get to dynamic linker sections. */ |
| 3180 | asection *glink; |
| 3181 | asection *global_entry; |
| 3182 | asection *sfpr; |
| 3183 | asection *pltlocal; |
| 3184 | asection *relpltlocal; |
| 3185 | asection *brlt; |
| 3186 | asection *relbrlt; |
| 3187 | asection *glink_eh_frame; |
| 3188 | |
| 3189 | /* Shortcut to .__tls_get_addr and __tls_get_addr. */ |
| 3190 | struct ppc_link_hash_entry *tls_get_addr; |
| 3191 | struct ppc_link_hash_entry *tls_get_addr_fd; |
| 3192 | struct ppc_link_hash_entry *tga_desc; |
| 3193 | struct ppc_link_hash_entry *tga_desc_fd; |
| 3194 | struct map_stub *tga_group; |
| 3195 | |
| 3196 | /* The size of reliplt used by got entry relocs. */ |
| 3197 | bfd_size_type got_reli_size; |
| 3198 | |
| 3199 | /* Statistics. */ |
| 3200 | unsigned long stub_count[ppc_stub_global_entry]; |
| 3201 | |
| 3202 | /* Number of stubs against global syms. */ |
| 3203 | unsigned long stub_globals; |
| 3204 | |
| 3205 | /* Set if we're linking code with function descriptors. */ |
| 3206 | unsigned int opd_abi:1; |
| 3207 | |
| 3208 | /* Support for multiple toc sections. */ |
| 3209 | unsigned int do_multi_toc:1; |
| 3210 | unsigned int multi_toc_needed:1; |
| 3211 | unsigned int second_toc_pass:1; |
| 3212 | unsigned int do_toc_opt:1; |
| 3213 | |
| 3214 | /* Set if tls optimization is enabled. */ |
| 3215 | unsigned int do_tls_opt:1; |
| 3216 | |
| 3217 | /* Set if inline plt calls should be converted to direct calls. */ |
| 3218 | unsigned int can_convert_all_inline_plt:1; |
| 3219 | |
| 3220 | /* Set on error. */ |
| 3221 | unsigned int stub_error:1; |
| 3222 | |
| 3223 | /* Whether func_desc_adjust needs to be run over symbols. */ |
| 3224 | unsigned int need_func_desc_adj:1; |
| 3225 | |
| 3226 | /* Whether there exist local gnu indirect function resolvers, |
| 3227 | referenced by dynamic relocations. */ |
| 3228 | unsigned int local_ifunc_resolver:1; |
| 3229 | unsigned int maybe_local_ifunc_resolver:1; |
| 3230 | |
| 3231 | /* Whether plt calls for ELFv2 localentry:0 funcs have been optimized. */ |
| 3232 | unsigned int has_plt_localentry0:1; |
| 3233 | |
| 3234 | /* Whether calls are made via the PLT from NOTOC functions. */ |
| 3235 | unsigned int notoc_plt:1; |
| 3236 | |
| 3237 | /* Whether to use power10 instructions in linkage stubs. */ |
| 3238 | unsigned int power10_stubs:1; |
| 3239 | |
| 3240 | /* Incremented every time we size stubs. */ |
| 3241 | unsigned int stub_iteration; |
| 3242 | |
| 3243 | /* Small local sym cache. */ |
| 3244 | struct sym_cache sym_cache; |
| 3245 | }; |
| 3246 | |
| 3247 | /* Rename some of the generic section flags to better document how they |
| 3248 | are used here. */ |
| 3249 | |
| 3250 | /* Nonzero if this section has TLS related relocations. */ |
| 3251 | #define has_tls_reloc sec_flg0 |
| 3252 | |
| 3253 | /* Nonzero if this section has a call to __tls_get_addr lacking marker |
| 3254 | relocations. */ |
| 3255 | #define nomark_tls_get_addr sec_flg1 |
| 3256 | |
| 3257 | /* Nonzero if this section has any toc or got relocs. */ |
| 3258 | #define has_toc_reloc sec_flg2 |
| 3259 | |
| 3260 | /* Nonzero if this section has a call to another section that uses |
| 3261 | the toc or got. */ |
| 3262 | #define makes_toc_func_call sec_flg3 |
| 3263 | |
| 3264 | /* Recursion protection when determining above flag. */ |
| 3265 | #define call_check_in_progress sec_flg4 |
| 3266 | #define call_check_done sec_flg5 |
| 3267 | |
| 3268 | /* Get the ppc64 ELF linker hash table from a link_info structure. */ |
| 3269 | |
| 3270 | #define ppc_hash_table(p) \ |
| 3271 | (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ |
| 3272 | == PPC64_ELF_DATA ? ((struct ppc_link_hash_table *) ((p)->hash)) : NULL) |
| 3273 | |
| 3274 | #define ppc_stub_hash_lookup(table, string, create, copy) \ |
| 3275 | ((struct ppc_stub_hash_entry *) \ |
| 3276 | bfd_hash_lookup ((table), (string), (create), (copy))) |
| 3277 | |
| 3278 | #define ppc_branch_hash_lookup(table, string, create, copy) \ |
| 3279 | ((struct ppc_branch_hash_entry *) \ |
| 3280 | bfd_hash_lookup ((table), (string), (create), (copy))) |
| 3281 | |
| 3282 | /* Create an entry in the stub hash table. */ |
| 3283 | |
| 3284 | static struct bfd_hash_entry * |
| 3285 | stub_hash_newfunc (struct bfd_hash_entry *entry, |
| 3286 | struct bfd_hash_table *table, |
| 3287 | const char *string) |
| 3288 | { |
| 3289 | /* Allocate the structure if it has not already been allocated by a |
| 3290 | subclass. */ |
| 3291 | if (entry == NULL) |
| 3292 | { |
| 3293 | entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry)); |
| 3294 | if (entry == NULL) |
| 3295 | return entry; |
| 3296 | } |
| 3297 | |
| 3298 | /* Call the allocation method of the superclass. */ |
| 3299 | entry = bfd_hash_newfunc (entry, table, string); |
| 3300 | if (entry != NULL) |
| 3301 | { |
| 3302 | struct ppc_stub_hash_entry *eh; |
| 3303 | |
| 3304 | /* Initialize the local fields. */ |
| 3305 | eh = (struct ppc_stub_hash_entry *) entry; |
| 3306 | eh->stub_type = ppc_stub_none; |
| 3307 | eh->group = NULL; |
| 3308 | eh->stub_offset = 0; |
| 3309 | eh->target_value = 0; |
| 3310 | eh->target_section = NULL; |
| 3311 | eh->h = NULL; |
| 3312 | eh->plt_ent = NULL; |
| 3313 | eh->other = 0; |
| 3314 | } |
| 3315 | |
| 3316 | return entry; |
| 3317 | } |
| 3318 | |
| 3319 | /* Create an entry in the branch hash table. */ |
| 3320 | |
| 3321 | static struct bfd_hash_entry * |
| 3322 | branch_hash_newfunc (struct bfd_hash_entry *entry, |
| 3323 | struct bfd_hash_table *table, |
| 3324 | const char *string) |
| 3325 | { |
| 3326 | /* Allocate the structure if it has not already been allocated by a |
| 3327 | subclass. */ |
| 3328 | if (entry == NULL) |
| 3329 | { |
| 3330 | entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry)); |
| 3331 | if (entry == NULL) |
| 3332 | return entry; |
| 3333 | } |
| 3334 | |
| 3335 | /* Call the allocation method of the superclass. */ |
| 3336 | entry = bfd_hash_newfunc (entry, table, string); |
| 3337 | if (entry != NULL) |
| 3338 | { |
| 3339 | struct ppc_branch_hash_entry *eh; |
| 3340 | |
| 3341 | /* Initialize the local fields. */ |
| 3342 | eh = (struct ppc_branch_hash_entry *) entry; |
| 3343 | eh->offset = 0; |
| 3344 | eh->iter = 0; |
| 3345 | } |
| 3346 | |
| 3347 | return entry; |
| 3348 | } |
| 3349 | |
| 3350 | /* Create an entry in a ppc64 ELF linker hash table. */ |
| 3351 | |
| 3352 | static struct bfd_hash_entry * |
| 3353 | link_hash_newfunc (struct bfd_hash_entry *entry, |
| 3354 | struct bfd_hash_table *table, |
| 3355 | const char *string) |
| 3356 | { |
| 3357 | /* Allocate the structure if it has not already been allocated by a |
| 3358 | subclass. */ |
| 3359 | if (entry == NULL) |
| 3360 | { |
| 3361 | entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry)); |
| 3362 | if (entry == NULL) |
| 3363 | return entry; |
| 3364 | } |
| 3365 | |
| 3366 | /* Call the allocation method of the superclass. */ |
| 3367 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
| 3368 | if (entry != NULL) |
| 3369 | { |
| 3370 | struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry; |
| 3371 | |
| 3372 | memset (&eh->u.stub_cache, 0, |
| 3373 | (sizeof (struct ppc_link_hash_entry) |
| 3374 | - offsetof (struct ppc_link_hash_entry, u.stub_cache))); |
| 3375 | |
| 3376 | /* When making function calls, old ABI code references function entry |
| 3377 | points (dot symbols), while new ABI code references the function |
| 3378 | descriptor symbol. We need to make any combination of reference and |
| 3379 | definition work together, without breaking archive linking. |
| 3380 | |
| 3381 | For a defined function "foo" and an undefined call to "bar": |
| 3382 | An old object defines "foo" and ".foo", references ".bar" (possibly |
| 3383 | "bar" too). |
| 3384 | A new object defines "foo" and references "bar". |
| 3385 | |
| 3386 | A new object thus has no problem with its undefined symbols being |
| 3387 | satisfied by definitions in an old object. On the other hand, the |
| 3388 | old object won't have ".bar" satisfied by a new object. |
| 3389 | |
| 3390 | Keep a list of newly added dot-symbols. */ |
| 3391 | |
| 3392 | if (string[0] == '.') |
| 3393 | { |
| 3394 | struct ppc_link_hash_table *htab; |
| 3395 | |
| 3396 | htab = (struct ppc_link_hash_table *) table; |
| 3397 | eh->u.next_dot_sym = htab->dot_syms; |
| 3398 | htab->dot_syms = eh; |
| 3399 | } |
| 3400 | } |
| 3401 | |
| 3402 | return entry; |
| 3403 | } |
| 3404 | |
| 3405 | struct tocsave_entry |
| 3406 | { |
| 3407 | asection *sec; |
| 3408 | bfd_vma offset; |
| 3409 | }; |
| 3410 | |
| 3411 | static hashval_t |
| 3412 | tocsave_htab_hash (const void *p) |
| 3413 | { |
| 3414 | const struct tocsave_entry *e = (const struct tocsave_entry *) p; |
| 3415 | return ((bfd_vma) (intptr_t) e->sec ^ e->offset) >> 3; |
| 3416 | } |
| 3417 | |
| 3418 | static int |
| 3419 | tocsave_htab_eq (const void *p1, const void *p2) |
| 3420 | { |
| 3421 | const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1; |
| 3422 | const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2; |
| 3423 | return e1->sec == e2->sec && e1->offset == e2->offset; |
| 3424 | } |
| 3425 | |
| 3426 | /* Destroy a ppc64 ELF linker hash table. */ |
| 3427 | |
| 3428 | static void |
| 3429 | ppc64_elf_link_hash_table_free (bfd *obfd) |
| 3430 | { |
| 3431 | struct ppc_link_hash_table *htab; |
| 3432 | |
| 3433 | htab = (struct ppc_link_hash_table *) obfd->link.hash; |
| 3434 | if (htab->tocsave_htab) |
| 3435 | htab_delete (htab->tocsave_htab); |
| 3436 | bfd_hash_table_free (&htab->branch_hash_table); |
| 3437 | bfd_hash_table_free (&htab->stub_hash_table); |
| 3438 | _bfd_elf_link_hash_table_free (obfd); |
| 3439 | } |
| 3440 | |
| 3441 | /* Create a ppc64 ELF linker hash table. */ |
| 3442 | |
| 3443 | static struct bfd_link_hash_table * |
| 3444 | ppc64_elf_link_hash_table_create (bfd *abfd) |
| 3445 | { |
| 3446 | struct ppc_link_hash_table *htab; |
| 3447 | size_t amt = sizeof (struct ppc_link_hash_table); |
| 3448 | |
| 3449 | htab = bfd_zmalloc (amt); |
| 3450 | if (htab == NULL) |
| 3451 | return NULL; |
| 3452 | |
| 3453 | if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc, |
| 3454 | sizeof (struct ppc_link_hash_entry), |
| 3455 | PPC64_ELF_DATA)) |
| 3456 | { |
| 3457 | free (htab); |
| 3458 | return NULL; |
| 3459 | } |
| 3460 | |
| 3461 | /* Init the stub hash table too. */ |
| 3462 | if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc, |
| 3463 | sizeof (struct ppc_stub_hash_entry))) |
| 3464 | { |
| 3465 | _bfd_elf_link_hash_table_free (abfd); |
| 3466 | return NULL; |
| 3467 | } |
| 3468 | |
| 3469 | /* And the branch hash table. */ |
| 3470 | if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc, |
| 3471 | sizeof (struct ppc_branch_hash_entry))) |
| 3472 | { |
| 3473 | bfd_hash_table_free (&htab->stub_hash_table); |
| 3474 | _bfd_elf_link_hash_table_free (abfd); |
| 3475 | return NULL; |
| 3476 | } |
| 3477 | |
| 3478 | htab->tocsave_htab = htab_try_create (1024, |
| 3479 | tocsave_htab_hash, |
| 3480 | tocsave_htab_eq, |
| 3481 | NULL); |
| 3482 | if (htab->tocsave_htab == NULL) |
| 3483 | { |
| 3484 | ppc64_elf_link_hash_table_free (abfd); |
| 3485 | return NULL; |
| 3486 | } |
| 3487 | htab->elf.root.hash_table_free = ppc64_elf_link_hash_table_free; |
| 3488 | |
| 3489 | /* Initializing two fields of the union is just cosmetic. We really |
| 3490 | only care about glist, but when compiled on a 32-bit host the |
| 3491 | bfd_vma fields are larger. Setting the bfd_vma to zero makes |
| 3492 | debugger inspection of these fields look nicer. */ |
| 3493 | htab->elf.init_got_refcount.refcount = 0; |
| 3494 | htab->elf.init_got_refcount.glist = NULL; |
| 3495 | htab->elf.init_plt_refcount.refcount = 0; |
| 3496 | htab->elf.init_plt_refcount.glist = NULL; |
| 3497 | htab->elf.init_got_offset.offset = 0; |
| 3498 | htab->elf.init_got_offset.glist = NULL; |
| 3499 | htab->elf.init_plt_offset.offset = 0; |
| 3500 | htab->elf.init_plt_offset.glist = NULL; |
| 3501 | |
| 3502 | return &htab->elf.root; |
| 3503 | } |
| 3504 | |
| 3505 | /* Create sections for linker generated code. */ |
| 3506 | |
| 3507 | static bfd_boolean |
| 3508 | create_linkage_sections (bfd *dynobj, struct bfd_link_info *info) |
| 3509 | { |
| 3510 | struct ppc_link_hash_table *htab; |
| 3511 | flagword flags; |
| 3512 | |
| 3513 | htab = ppc_hash_table (info); |
| 3514 | |
| 3515 | flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY |
| 3516 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| 3517 | if (htab->params->save_restore_funcs) |
| 3518 | { |
| 3519 | /* Create .sfpr for code to save and restore fp regs. */ |
| 3520 | htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr", |
| 3521 | flags); |
| 3522 | if (htab->sfpr == NULL |
| 3523 | || !bfd_set_section_alignment (htab->sfpr, 2)) |
| 3524 | return FALSE; |
| 3525 | } |
| 3526 | |
| 3527 | if (bfd_link_relocatable (info)) |
| 3528 | return TRUE; |
| 3529 | |
| 3530 | /* Create .glink for lazy dynamic linking support. */ |
| 3531 | htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink", |
| 3532 | flags); |
| 3533 | if (htab->glink == NULL |
| 3534 | || !bfd_set_section_alignment (htab->glink, 3)) |
| 3535 | return FALSE; |
| 3536 | |
| 3537 | /* The part of .glink used by global entry stubs, separate so that |
| 3538 | it can be aligned appropriately without affecting htab->glink. */ |
| 3539 | htab->global_entry = bfd_make_section_anyway_with_flags (dynobj, ".glink", |
| 3540 | flags); |
| 3541 | if (htab->global_entry == NULL |
| 3542 | || !bfd_set_section_alignment (htab->global_entry, 2)) |
| 3543 | return FALSE; |
| 3544 | |
| 3545 | if (!info->no_ld_generated_unwind_info) |
| 3546 | { |
| 3547 | flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS |
| 3548 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| 3549 | htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj, |
| 3550 | ".eh_frame", |
| 3551 | flags); |
| 3552 | if (htab->glink_eh_frame == NULL |
| 3553 | || !bfd_set_section_alignment (htab->glink_eh_frame, 2)) |
| 3554 | return FALSE; |
| 3555 | } |
| 3556 | |
| 3557 | flags = SEC_ALLOC | SEC_LINKER_CREATED; |
| 3558 | htab->elf.iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags); |
| 3559 | if (htab->elf.iplt == NULL |
| 3560 | || !bfd_set_section_alignment (htab->elf.iplt, 3)) |
| 3561 | return FALSE; |
| 3562 | |
| 3563 | flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY |
| 3564 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| 3565 | htab->elf.irelplt |
| 3566 | = bfd_make_section_anyway_with_flags (dynobj, ".rela.iplt", flags); |
| 3567 | if (htab->elf.irelplt == NULL |
| 3568 | || !bfd_set_section_alignment (htab->elf.irelplt, 3)) |
| 3569 | return FALSE; |
| 3570 | |
| 3571 | /* Create branch lookup table for plt_branch stubs. */ |
| 3572 | flags = (SEC_ALLOC | SEC_LOAD |
| 3573 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| 3574 | htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt", |
| 3575 | flags); |
| 3576 | if (htab->brlt == NULL |
| 3577 | || !bfd_set_section_alignment (htab->brlt, 3)) |
| 3578 | return FALSE; |
| 3579 | |
| 3580 | /* Local plt entries, put in .branch_lt but a separate section for |
| 3581 | convenience. */ |
| 3582 | htab->pltlocal = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt", |
| 3583 | flags); |
| 3584 | if (htab->pltlocal == NULL |
| 3585 | || !bfd_set_section_alignment (htab->pltlocal, 3)) |
| 3586 | return FALSE; |
| 3587 | |
| 3588 | if (!bfd_link_pic (info)) |
| 3589 | return TRUE; |
| 3590 | |
| 3591 | flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY |
| 3592 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| 3593 | htab->relbrlt |
| 3594 | = bfd_make_section_anyway_with_flags (dynobj, ".rela.branch_lt", flags); |
| 3595 | if (htab->relbrlt == NULL |
| 3596 | || !bfd_set_section_alignment (htab->relbrlt, 3)) |
| 3597 | return FALSE; |
| 3598 | |
| 3599 | htab->relpltlocal |
| 3600 | = bfd_make_section_anyway_with_flags (dynobj, ".rela.branch_lt", flags); |
| 3601 | if (htab->relpltlocal == NULL |
| 3602 | || !bfd_set_section_alignment (htab->relpltlocal, 3)) |
| 3603 | return FALSE; |
| 3604 | |
| 3605 | return TRUE; |
| 3606 | } |
| 3607 | |
| 3608 | /* Satisfy the ELF linker by filling in some fields in our fake bfd. */ |
| 3609 | |
| 3610 | bfd_boolean |
| 3611 | ppc64_elf_init_stub_bfd (struct bfd_link_info *info, |
| 3612 | struct ppc64_elf_params *params) |
| 3613 | { |
| 3614 | struct ppc_link_hash_table *htab; |
| 3615 | |
| 3616 | elf_elfheader (params->stub_bfd)->e_ident[EI_CLASS] = ELFCLASS64; |
| 3617 | |
| 3618 | /* Always hook our dynamic sections into the first bfd, which is the |
| 3619 | linker created stub bfd. This ensures that the GOT header is at |
| 3620 | the start of the output TOC section. */ |
| 3621 | htab = ppc_hash_table (info); |
| 3622 | htab->elf.dynobj = params->stub_bfd; |
| 3623 | htab->params = params; |
| 3624 | |
| 3625 | return create_linkage_sections (htab->elf.dynobj, info); |
| 3626 | } |
| 3627 | |
| 3628 | /* Build a name for an entry in the stub hash table. */ |
| 3629 | |
| 3630 | static char * |
| 3631 | ppc_stub_name (const asection *input_section, |
| 3632 | const asection *sym_sec, |
| 3633 | const struct ppc_link_hash_entry *h, |
| 3634 | const Elf_Internal_Rela *rel) |
| 3635 | { |
| 3636 | char *stub_name; |
| 3637 | ssize_t len; |
| 3638 | |
| 3639 | /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31 |
| 3640 | offsets from a sym as a branch target? In fact, we could |
| 3641 | probably assume the addend is always zero. */ |
| 3642 | BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend); |
| 3643 | |
| 3644 | if (h) |
| 3645 | { |
| 3646 | len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1; |
| 3647 | stub_name = bfd_malloc (len); |
| 3648 | if (stub_name == NULL) |
| 3649 | return stub_name; |
| 3650 | |
| 3651 | len = sprintf (stub_name, "%08x.%s+%x", |
| 3652 | input_section->id & 0xffffffff, |
| 3653 | h->elf.root.root.string, |
| 3654 | (int) rel->r_addend & 0xffffffff); |
| 3655 | } |
| 3656 | else |
| 3657 | { |
| 3658 | len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1; |
| 3659 | stub_name = bfd_malloc (len); |
| 3660 | if (stub_name == NULL) |
| 3661 | return stub_name; |
| 3662 | |
| 3663 | len = sprintf (stub_name, "%08x.%x:%x+%x", |
| 3664 | input_section->id & 0xffffffff, |
| 3665 | sym_sec->id & 0xffffffff, |
| 3666 | (int) ELF64_R_SYM (rel->r_info) & 0xffffffff, |
| 3667 | (int) rel->r_addend & 0xffffffff); |
| 3668 | } |
| 3669 | if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0') |
| 3670 | stub_name[len - 2] = 0; |
| 3671 | return stub_name; |
| 3672 | } |
| 3673 | |
| 3674 | /* Look up an entry in the stub hash. Stub entries are cached because |
| 3675 | creating the stub name takes a bit of time. */ |
| 3676 | |
| 3677 | static struct ppc_stub_hash_entry * |
| 3678 | ppc_get_stub_entry (const asection *input_section, |
| 3679 | const asection *sym_sec, |
| 3680 | struct ppc_link_hash_entry *h, |
| 3681 | const Elf_Internal_Rela *rel, |
| 3682 | struct ppc_link_hash_table *htab) |
| 3683 | { |
| 3684 | struct ppc_stub_hash_entry *stub_entry; |
| 3685 | struct map_stub *group; |
| 3686 | |
| 3687 | /* If this input section is part of a group of sections sharing one |
| 3688 | stub section, then use the id of the first section in the group. |
| 3689 | Stub names need to include a section id, as there may well be |
| 3690 | more than one stub used to reach say, printf, and we need to |
| 3691 | distinguish between them. */ |
| 3692 | group = htab->sec_info[input_section->id].u.group; |
| 3693 | if (group == NULL) |
| 3694 | return NULL; |
| 3695 | |
| 3696 | if (h != NULL && h->u.stub_cache != NULL |
| 3697 | && h->u.stub_cache->h == h |
| 3698 | && h->u.stub_cache->group == group) |
| 3699 | { |
| 3700 | stub_entry = h->u.stub_cache; |
| 3701 | } |
| 3702 | else |
| 3703 | { |
| 3704 | char *stub_name; |
| 3705 | |
| 3706 | stub_name = ppc_stub_name (group->link_sec, sym_sec, h, rel); |
| 3707 | if (stub_name == NULL) |
| 3708 | return NULL; |
| 3709 | |
| 3710 | stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, |
| 3711 | stub_name, FALSE, FALSE); |
| 3712 | if (h != NULL) |
| 3713 | h->u.stub_cache = stub_entry; |
| 3714 | |
| 3715 | free (stub_name); |
| 3716 | } |
| 3717 | |
| 3718 | return stub_entry; |
| 3719 | } |
| 3720 | |
| 3721 | /* Add a new stub entry to the stub hash. Not all fields of the new |
| 3722 | stub entry are initialised. */ |
| 3723 | |
| 3724 | static struct ppc_stub_hash_entry * |
| 3725 | ppc_add_stub (const char *stub_name, |
| 3726 | asection *section, |
| 3727 | struct bfd_link_info *info) |
| 3728 | { |
| 3729 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
| 3730 | struct map_stub *group; |
| 3731 | asection *link_sec; |
| 3732 | asection *stub_sec; |
| 3733 | struct ppc_stub_hash_entry *stub_entry; |
| 3734 | |
| 3735 | group = htab->sec_info[section->id].u.group; |
| 3736 | link_sec = group->link_sec; |
| 3737 | stub_sec = group->stub_sec; |
| 3738 | if (stub_sec == NULL) |
| 3739 | { |
| 3740 | size_t namelen; |
| 3741 | bfd_size_type len; |
| 3742 | char *s_name; |
| 3743 | |
| 3744 | namelen = strlen (link_sec->name); |
| 3745 | len = namelen + sizeof (STUB_SUFFIX); |
| 3746 | s_name = bfd_alloc (htab->params->stub_bfd, len); |
| 3747 | if (s_name == NULL) |
| 3748 | return NULL; |
| 3749 | |
| 3750 | memcpy (s_name, link_sec->name, namelen); |
| 3751 | memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX)); |
| 3752 | stub_sec = (*htab->params->add_stub_section) (s_name, link_sec); |
| 3753 | if (stub_sec == NULL) |
| 3754 | return NULL; |
| 3755 | group->stub_sec = stub_sec; |
| 3756 | } |
| 3757 | |
| 3758 | /* Enter this entry into the linker stub hash table. */ |
| 3759 | stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name, |
| 3760 | TRUE, FALSE); |
| 3761 | if (stub_entry == NULL) |
| 3762 | { |
| 3763 | /* xgettext:c-format */ |
| 3764 | _bfd_error_handler (_("%pB: cannot create stub entry %s"), |
| 3765 | section->owner, stub_name); |
| 3766 | return NULL; |
| 3767 | } |
| 3768 | |
| 3769 | stub_entry->group = group; |
| 3770 | stub_entry->stub_offset = 0; |
| 3771 | return stub_entry; |
| 3772 | } |
| 3773 | |
| 3774 | /* Create .got and .rela.got sections in ABFD, and .got in dynobj if |
| 3775 | not already done. */ |
| 3776 | |
| 3777 | static bfd_boolean |
| 3778 | create_got_section (bfd *abfd, struct bfd_link_info *info) |
| 3779 | { |
| 3780 | asection *got, *relgot; |
| 3781 | flagword flags; |
| 3782 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
| 3783 | |
| 3784 | if (!is_ppc64_elf (abfd)) |
| 3785 | return FALSE; |
| 3786 | if (htab == NULL) |
| 3787 | return FALSE; |
| 3788 | |
| 3789 | if (!htab->elf.sgot |
| 3790 | && !_bfd_elf_create_got_section (htab->elf.dynobj, info)) |
| 3791 | return FALSE; |
| 3792 | |
| 3793 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY |
| 3794 | | SEC_LINKER_CREATED); |
| 3795 | |
| 3796 | got = bfd_make_section_anyway_with_flags (abfd, ".got", flags); |
| 3797 | if (!got |
| 3798 | || !bfd_set_section_alignment (got, 3)) |
| 3799 | return FALSE; |
| 3800 | |
| 3801 | relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got", |
| 3802 | flags | SEC_READONLY); |
| 3803 | if (!relgot |
| 3804 | || !bfd_set_section_alignment (relgot, 3)) |
| 3805 | return FALSE; |
| 3806 | |
| 3807 | ppc64_elf_tdata (abfd)->got = got; |
| 3808 | ppc64_elf_tdata (abfd)->relgot = relgot; |
| 3809 | return TRUE; |
| 3810 | } |
| 3811 | |
| 3812 | /* Follow indirect and warning symbol links. */ |
| 3813 | |
| 3814 | static inline struct bfd_link_hash_entry * |
| 3815 | follow_link (struct bfd_link_hash_entry *h) |
| 3816 | { |
| 3817 | while (h->type == bfd_link_hash_indirect |
| 3818 | || h->type == bfd_link_hash_warning) |
| 3819 | h = h->u.i.link; |
| 3820 | return h; |
| 3821 | } |
| 3822 | |
| 3823 | static inline struct elf_link_hash_entry * |
| 3824 | elf_follow_link (struct elf_link_hash_entry *h) |
| 3825 | { |
| 3826 | return (struct elf_link_hash_entry *) follow_link (&h->root); |
| 3827 | } |
| 3828 | |
| 3829 | static inline struct ppc_link_hash_entry * |
| 3830 | ppc_follow_link (struct ppc_link_hash_entry *h) |
| 3831 | { |
| 3832 | return ppc_elf_hash_entry (elf_follow_link (&h->elf)); |
| 3833 | } |
| 3834 | |
| 3835 | /* Merge PLT info on FROM with that on TO. */ |
| 3836 | |
| 3837 | static void |
| 3838 | move_plt_plist (struct ppc_link_hash_entry *from, |
| 3839 | struct ppc_link_hash_entry *to) |
| 3840 | { |
| 3841 | if (from->elf.plt.plist != NULL) |
| 3842 | { |
| 3843 | if (to->elf.plt.plist != NULL) |
| 3844 | { |
| 3845 | struct plt_entry **entp; |
| 3846 | struct plt_entry *ent; |
| 3847 | |
| 3848 | for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; ) |
| 3849 | { |
| 3850 | struct plt_entry *dent; |
| 3851 | |
| 3852 | for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next) |
| 3853 | if (dent->addend == ent->addend) |
| 3854 | { |
| 3855 | dent->plt.refcount += ent->plt.refcount; |
| 3856 | *entp = ent->next; |
| 3857 | break; |
| 3858 | } |
| 3859 | if (dent == NULL) |
| 3860 | entp = &ent->next; |
| 3861 | } |
| 3862 | *entp = to->elf.plt.plist; |
| 3863 | } |
| 3864 | |
| 3865 | to->elf.plt.plist = from->elf.plt.plist; |
| 3866 | from->elf.plt.plist = NULL; |
| 3867 | } |
| 3868 | } |
| 3869 | |
| 3870 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
| 3871 | |
| 3872 | static void |
| 3873 | ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info, |
| 3874 | struct elf_link_hash_entry *dir, |
| 3875 | struct elf_link_hash_entry *ind) |
| 3876 | { |
| 3877 | struct ppc_link_hash_entry *edir, *eind; |
| 3878 | |
| 3879 | edir = ppc_elf_hash_entry (dir); |
| 3880 | eind = ppc_elf_hash_entry (ind); |
| 3881 | |
| 3882 | edir->is_func |= eind->is_func; |
| 3883 | edir->is_func_descriptor |= eind->is_func_descriptor; |
| 3884 | edir->tls_mask |= eind->tls_mask; |
| 3885 | if (eind->oh != NULL) |
| 3886 | edir->oh = ppc_follow_link (eind->oh); |
| 3887 | |
| 3888 | if (edir->elf.versioned != versioned_hidden) |
| 3889 | edir->elf.ref_dynamic |= eind->elf.ref_dynamic; |
| 3890 | edir->elf.ref_regular |= eind->elf.ref_regular; |
| 3891 | edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak; |
| 3892 | edir->elf.non_got_ref |= eind->elf.non_got_ref; |
| 3893 | edir->elf.needs_plt |= eind->elf.needs_plt; |
| 3894 | edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed; |
| 3895 | |
| 3896 | /* If we were called to copy over info for a weak sym, don't copy |
| 3897 | dyn_relocs, plt/got info, or dynindx. We used to copy dyn_relocs |
| 3898 | in order to simplify readonly_dynrelocs and save a field in the |
| 3899 | symbol hash entry, but that means dyn_relocs can't be used in any |
| 3900 | tests about a specific symbol, or affect other symbol flags which |
| 3901 | are then tested. */ |
| 3902 | if (eind->elf.root.type != bfd_link_hash_indirect) |
| 3903 | return; |
| 3904 | |
| 3905 | /* Copy over any dynamic relocs we may have on the indirect sym. */ |
| 3906 | if (ind->dyn_relocs != NULL) |
| 3907 | { |
| 3908 | if (dir->dyn_relocs != NULL) |
| 3909 | { |
| 3910 | struct elf_dyn_relocs **pp; |
| 3911 | struct elf_dyn_relocs *p; |
| 3912 | |
| 3913 | /* Add reloc counts against the indirect sym to the direct sym |
| 3914 | list. Merge any entries against the same section. */ |
| 3915 | for (pp = &ind->dyn_relocs; (p = *pp) != NULL; ) |
| 3916 | { |
| 3917 | struct elf_dyn_relocs *q; |
| 3918 | |
| 3919 | for (q = dir->dyn_relocs; q != NULL; q = q->next) |
| 3920 | if (q->sec == p->sec) |
| 3921 | { |
| 3922 | q->pc_count += p->pc_count; |
| 3923 | q->count += p->count; |
| 3924 | *pp = p->next; |
| 3925 | break; |
| 3926 | } |
| 3927 | if (q == NULL) |
| 3928 | pp = &p->next; |
| 3929 | } |
| 3930 | *pp = dir->dyn_relocs; |
| 3931 | } |
| 3932 | |
| 3933 | dir->dyn_relocs = ind->dyn_relocs; |
| 3934 | ind->dyn_relocs = NULL; |
| 3935 | } |
| 3936 | |
| 3937 | /* Copy over got entries that we may have already seen to the |
| 3938 | symbol which just became indirect. */ |
| 3939 | if (eind->elf.got.glist != NULL) |
| 3940 | { |
| 3941 | if (edir->elf.got.glist != NULL) |
| 3942 | { |
| 3943 | struct got_entry **entp; |
| 3944 | struct got_entry *ent; |
| 3945 | |
| 3946 | for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; ) |
| 3947 | { |
| 3948 | struct got_entry *dent; |
| 3949 | |
| 3950 | for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next) |
| 3951 | if (dent->addend == ent->addend |
| 3952 | && dent->owner == ent->owner |
| 3953 | && dent->tls_type == ent->tls_type) |
| 3954 | { |
| 3955 | dent->got.refcount += ent->got.refcount; |
| 3956 | *entp = ent->next; |
| 3957 | break; |
| 3958 | } |
| 3959 | if (dent == NULL) |
| 3960 | entp = &ent->next; |
| 3961 | } |
| 3962 | *entp = edir->elf.got.glist; |
| 3963 | } |
| 3964 | |
| 3965 | edir->elf.got.glist = eind->elf.got.glist; |
| 3966 | eind->elf.got.glist = NULL; |
| 3967 | } |
| 3968 | |
| 3969 | /* And plt entries. */ |
| 3970 | move_plt_plist (eind, edir); |
| 3971 | |
| 3972 | if (eind->elf.dynindx != -1) |
| 3973 | { |
| 3974 | if (edir->elf.dynindx != -1) |
| 3975 | _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, |
| 3976 | edir->elf.dynstr_index); |
| 3977 | edir->elf.dynindx = eind->elf.dynindx; |
| 3978 | edir->elf.dynstr_index = eind->elf.dynstr_index; |
| 3979 | eind->elf.dynindx = -1; |
| 3980 | eind->elf.dynstr_index = 0; |
| 3981 | } |
| 3982 | } |
| 3983 | |
| 3984 | /* Find the function descriptor hash entry from the given function code |
| 3985 | hash entry FH. Link the entries via their OH fields. */ |
| 3986 | |
| 3987 | static struct ppc_link_hash_entry * |
| 3988 | lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab) |
| 3989 | { |
| 3990 | struct ppc_link_hash_entry *fdh = fh->oh; |
| 3991 | |
| 3992 | if (fdh == NULL) |
| 3993 | { |
| 3994 | const char *fd_name = fh->elf.root.root.string + 1; |
| 3995 | |
| 3996 | fdh = ppc_elf_hash_entry (elf_link_hash_lookup (&htab->elf, fd_name, |
| 3997 | FALSE, FALSE, FALSE)); |
| 3998 | if (fdh == NULL) |
| 3999 | return fdh; |
| 4000 | |
| 4001 | fdh->is_func_descriptor = 1; |
| 4002 | fdh->oh = fh; |
| 4003 | fh->is_func = 1; |
| 4004 | fh->oh = fdh; |
| 4005 | } |
| 4006 | |
| 4007 | fdh = ppc_follow_link (fdh); |
| 4008 | fdh->is_func_descriptor = 1; |
| 4009 | fdh->oh = fh; |
| 4010 | return fdh; |
| 4011 | } |
| 4012 | |
| 4013 | /* Make a fake function descriptor sym for the undefined code sym FH. */ |
| 4014 | |
| 4015 | static struct ppc_link_hash_entry * |
| 4016 | make_fdh (struct bfd_link_info *info, |
| 4017 | struct ppc_link_hash_entry *fh) |
| 4018 | { |
| 4019 | bfd *abfd = fh->elf.root.u.undef.abfd; |
| 4020 | struct bfd_link_hash_entry *bh = NULL; |
| 4021 | struct ppc_link_hash_entry *fdh; |
| 4022 | flagword flags = (fh->elf.root.type == bfd_link_hash_undefweak |
| 4023 | ? BSF_WEAK |
| 4024 | : BSF_GLOBAL); |
| 4025 | |
| 4026 | if (!_bfd_generic_link_add_one_symbol (info, abfd, |
| 4027 | fh->elf.root.root.string + 1, |
| 4028 | flags, bfd_und_section_ptr, 0, |
| 4029 | NULL, FALSE, FALSE, &bh)) |
| 4030 | return NULL; |
| 4031 | |
| 4032 | fdh = (struct ppc_link_hash_entry *) bh; |
| 4033 | fdh->elf.non_elf = 0; |
| 4034 | fdh->fake = 1; |
| 4035 | fdh->is_func_descriptor = 1; |
| 4036 | fdh->oh = fh; |
| 4037 | fh->is_func = 1; |
| 4038 | fh->oh = fdh; |
| 4039 | return fdh; |
| 4040 | } |
| 4041 | |
| 4042 | /* Fix function descriptor symbols defined in .opd sections to be |
| 4043 | function type. */ |
| 4044 | |
| 4045 | static bfd_boolean |
| 4046 | ppc64_elf_add_symbol_hook (bfd *ibfd, |
| 4047 | struct bfd_link_info *info, |
| 4048 | Elf_Internal_Sym *isym, |
| 4049 | const char **name, |
| 4050 | flagword *flags ATTRIBUTE_UNUSED, |
| 4051 | asection **sec, |
| 4052 | bfd_vma *value) |
| 4053 | { |
| 4054 | if (*sec != NULL |
| 4055 | && strcmp ((*sec)->name, ".opd") == 0) |
| 4056 | { |
| 4057 | asection *code_sec; |
| 4058 | |
| 4059 | if (!(ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC |
| 4060 | || ELF_ST_TYPE (isym->st_info) == STT_FUNC)) |
| 4061 | isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC); |
| 4062 | |
| 4063 | /* If the symbol is a function defined in .opd, and the function |
| 4064 | code is in a discarded group, let it appear to be undefined. */ |
| 4065 | if (!bfd_link_relocatable (info) |
| 4066 | && (*sec)->reloc_count != 0 |
| 4067 | && opd_entry_value (*sec, *value, &code_sec, NULL, |
| 4068 | FALSE) != (bfd_vma) -1 |
| 4069 | && discarded_section (code_sec)) |
| 4070 | { |
| 4071 | *sec = bfd_und_section_ptr; |
| 4072 | isym->st_shndx = SHN_UNDEF; |
| 4073 | } |
| 4074 | } |
| 4075 | else if (*sec != NULL |
| 4076 | && strcmp ((*sec)->name, ".toc") == 0 |
| 4077 | && ELF_ST_TYPE (isym->st_info) == STT_OBJECT) |
| 4078 | { |
| 4079 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
| 4080 | if (htab != NULL) |
| 4081 | htab->params->object_in_toc = 1; |
| 4082 | } |
| 4083 | |
| 4084 | if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0) |
| 4085 | { |
| 4086 | if (abiversion (ibfd) == 0) |
| 4087 | set_abiversion (ibfd, 2); |
| 4088 | else if (abiversion (ibfd) == 1) |
| 4089 | { |
| 4090 | _bfd_error_handler (_("symbol '%s' has invalid st_other" |
| 4091 | " for ABI version 1"), *name); |
| 4092 | bfd_set_error (bfd_error_bad_value); |
| 4093 | return FALSE; |
| 4094 | } |
| 4095 | } |
| 4096 | |
| 4097 | return TRUE; |
| 4098 | } |
| 4099 | |
| 4100 | /* Merge non-visibility st_other attributes: local entry point. */ |
| 4101 | |
| 4102 | static void |
| 4103 | ppc64_elf_merge_symbol_attribute (struct elf_link_hash_entry *h, |
| 4104 | const Elf_Internal_Sym *isym, |
| 4105 | bfd_boolean definition, |
| 4106 | bfd_boolean dynamic) |
| 4107 | { |
| 4108 | if (definition && (!dynamic || !h->def_regular)) |
| 4109 | h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1)) |
| 4110 | | ELF_ST_VISIBILITY (h->other)); |
| 4111 | } |
| 4112 | |
| 4113 | /* Hook called on merging a symbol. We use this to clear "fake" since |
| 4114 | we now have a real symbol. */ |
| 4115 | |
| 4116 | static bfd_boolean |
| 4117 | ppc64_elf_merge_symbol (struct elf_link_hash_entry *h, |
| 4118 | const Elf_Internal_Sym *isym, |
| 4119 | asection **psec ATTRIBUTE_UNUSED, |
| 4120 | bfd_boolean newdef ATTRIBUTE_UNUSED, |
| 4121 | bfd_boolean olddef ATTRIBUTE_UNUSED, |
| 4122 | bfd *oldbfd ATTRIBUTE_UNUSED, |
| 4123 | const asection *oldsec ATTRIBUTE_UNUSED) |
| 4124 | { |
| 4125 | ppc_elf_hash_entry (h)->fake = 0; |
| 4126 | if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0) |
| 4127 | ppc_elf_hash_entry (h)->non_zero_localentry = 1; |
| 4128 | return TRUE; |
| 4129 | } |
| 4130 | |
| 4131 | /* This function makes an old ABI object reference to ".bar" cause the |
| 4132 | inclusion of a new ABI object archive that defines "bar". |
| 4133 | NAME is a symbol defined in an archive. Return a symbol in the hash |
| 4134 | table that might be satisfied by the archive symbols. */ |
| 4135 | |
| 4136 | static struct elf_link_hash_entry * |
| 4137 | ppc64_elf_archive_symbol_lookup (bfd *abfd, |
| 4138 | struct bfd_link_info *info, |
| 4139 | const char *name) |
| 4140 | { |
| 4141 | struct elf_link_hash_entry *h; |
| 4142 | char *dot_name; |
| 4143 | size_t len; |
| 4144 | |
| 4145 | h = _bfd_elf_archive_symbol_lookup (abfd, info, name); |
| 4146 | if (h != NULL |
| 4147 | /* Don't return this sym if it is a fake function descriptor |
| 4148 | created by add_symbol_adjust. */ |
| 4149 | && !ppc_elf_hash_entry (h)->fake) |
| 4150 | return h; |
| 4151 | |
| 4152 | if (name[0] == '.') |
| 4153 | return h; |
| 4154 | |
| 4155 | len = strlen (name); |
| 4156 | dot_name = bfd_alloc (abfd, len + 2); |
| 4157 | if (dot_name == NULL) |
| 4158 | return (struct elf_link_hash_entry *) -1; |
| 4159 | dot_name[0] = '.'; |
| 4160 | memcpy (dot_name + 1, name, len + 1); |
| 4161 | h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name); |
| 4162 | bfd_release (abfd, dot_name); |
| 4163 | if (h != NULL) |
| 4164 | return h; |
| 4165 | |
| 4166 | if (strcmp (name, "__tls_get_addr_opt") == 0) |
| 4167 | h = _bfd_elf_archive_symbol_lookup (abfd, info, "__tls_get_addr_desc"); |
| 4168 | return h; |
| 4169 | } |
| 4170 | |
| 4171 | /* This function satisfies all old ABI object references to ".bar" if a |
| 4172 | new ABI object defines "bar". Well, at least, undefined dot symbols |
| 4173 | are made weak. This stops later archive searches from including an |
| 4174 | object if we already have a function descriptor definition. It also |
| 4175 | prevents the linker complaining about undefined symbols. |
| 4176 | We also check and correct mismatched symbol visibility here. The |
| 4177 | most restrictive visibility of the function descriptor and the |
| 4178 | function entry symbol is used. */ |
| 4179 | |
| 4180 | static bfd_boolean |
| 4181 | add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info) |
| 4182 | { |
| 4183 | struct ppc_link_hash_table *htab; |
| 4184 | struct ppc_link_hash_entry *fdh; |
| 4185 | |
| 4186 | if (eh->elf.root.type == bfd_link_hash_warning) |
| 4187 | eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link; |
| 4188 | |
| 4189 | if (eh->elf.root.type == bfd_link_hash_indirect) |
| 4190 | return TRUE; |
| 4191 | |
| 4192 | if (eh->elf.root.root.string[0] != '.') |
| 4193 | abort (); |
| 4194 | |
| 4195 | htab = ppc_hash_table (info); |
| 4196 | if (htab == NULL) |
| 4197 | return FALSE; |
| 4198 | |
| 4199 | fdh = lookup_fdh (eh, htab); |
| 4200 | if (fdh == NULL |
| 4201 | && !bfd_link_relocatable (info) |
| 4202 | && (eh->elf.root.type == bfd_link_hash_undefined |
| 4203 | || eh->elf.root.type == bfd_link_hash_undefweak) |
| 4204 | && eh->elf.ref_regular) |
| 4205 | { |
| 4206 | /* Make an undefined function descriptor sym, in order to |
| 4207 | pull in an --as-needed shared lib. Archives are handled |
| 4208 | elsewhere. */ |
| 4209 | fdh = make_fdh (info, eh); |
| 4210 | if (fdh == NULL) |
| 4211 | return FALSE; |
| 4212 | } |
| 4213 | |
| 4214 | if (fdh != NULL) |
| 4215 | { |
| 4216 | unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1; |
| 4217 | unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1; |
| 4218 | |
| 4219 | /* Make both descriptor and entry symbol have the most |
| 4220 | constraining visibility of either symbol. */ |
| 4221 | if (entry_vis < descr_vis) |
| 4222 | fdh->elf.other += entry_vis - descr_vis; |
| 4223 | else if (entry_vis > descr_vis) |
| 4224 | eh->elf.other += descr_vis - entry_vis; |
| 4225 | |
| 4226 | /* Propagate reference flags from entry symbol to function |
| 4227 | descriptor symbol. */ |
| 4228 | fdh->elf.root.non_ir_ref_regular |= eh->elf.root.non_ir_ref_regular; |
| 4229 | fdh->elf.root.non_ir_ref_dynamic |= eh->elf.root.non_ir_ref_dynamic; |
| 4230 | fdh->elf.ref_regular |= eh->elf.ref_regular; |
| 4231 | fdh->elf.ref_regular_nonweak |= eh->elf.ref_regular_nonweak; |
| 4232 | |
| 4233 | if (!fdh->elf.forced_local |
| 4234 | && fdh->elf.dynindx == -1 |
| 4235 | && fdh->elf.versioned != versioned_hidden |
| 4236 | && (bfd_link_dll (info) |
| 4237 | || fdh->elf.def_dynamic |
| 4238 | || fdh->elf.ref_dynamic) |
| 4239 | && (eh->elf.ref_regular |
| 4240 | || eh->elf.def_regular)) |
| 4241 | { |
| 4242 | if (!bfd_elf_link_record_dynamic_symbol (info, &fdh->elf)) |
| 4243 | return FALSE; |
| 4244 | } |
| 4245 | } |
| 4246 | |
| 4247 | return TRUE; |
| 4248 | } |
| 4249 | |
| 4250 | /* Set up opd section info and abiversion for IBFD, and process list |
| 4251 | of dot-symbols we made in link_hash_newfunc. */ |
| 4252 | |
| 4253 | static bfd_boolean |
| 4254 | ppc64_elf_before_check_relocs (bfd *ibfd, struct bfd_link_info *info) |
| 4255 | { |
| 4256 | struct ppc_link_hash_table *htab; |
| 4257 | struct ppc_link_hash_entry **p, *eh; |
| 4258 | asection *opd = bfd_get_section_by_name (ibfd, ".opd"); |
| 4259 | |
| 4260 | if (opd != NULL && opd->size != 0) |
| 4261 | { |
| 4262 | BFD_ASSERT (ppc64_elf_section_data (opd)->sec_type == sec_normal); |
| 4263 | ppc64_elf_section_data (opd)->sec_type = sec_opd; |
| 4264 | |
| 4265 | if (abiversion (ibfd) == 0) |
| 4266 | set_abiversion (ibfd, 1); |
| 4267 | else if (abiversion (ibfd) >= 2) |
| 4268 | { |
| 4269 | /* xgettext:c-format */ |
| 4270 | _bfd_error_handler (_("%pB .opd not allowed in ABI version %d"), |
| 4271 | ibfd, abiversion (ibfd)); |
| 4272 | bfd_set_error (bfd_error_bad_value); |
| 4273 | return FALSE; |
| 4274 | } |
| 4275 | } |
| 4276 | |
| 4277 | if (is_ppc64_elf (info->output_bfd)) |
| 4278 | { |
| 4279 | /* For input files without an explicit abiversion in e_flags |
| 4280 | we should have flagged any with symbol st_other bits set |
| 4281 | as ELFv1 and above flagged those with .opd as ELFv2. |
| 4282 | Set the output abiversion if not yet set, and for any input |
| 4283 | still ambiguous, take its abiversion from the output. |
| 4284 | Differences in ABI are reported later. */ |
| 4285 | if (abiversion (info->output_bfd) == 0) |
| 4286 | set_abiversion (info->output_bfd, abiversion (ibfd)); |
| 4287 | else if (abiversion (ibfd) == 0) |
| 4288 | set_abiversion (ibfd, abiversion (info->output_bfd)); |
| 4289 | } |
| 4290 | |
| 4291 | htab = ppc_hash_table (info); |
| 4292 | if (htab == NULL) |
| 4293 | return TRUE; |
| 4294 | |
| 4295 | if (opd != NULL && opd->size != 0 |
| 4296 | && (ibfd->flags & DYNAMIC) == 0 |
| 4297 | && (opd->flags & SEC_RELOC) != 0 |
| 4298 | && opd->reloc_count != 0 |
| 4299 | && !bfd_is_abs_section (opd->output_section) |
| 4300 | && info->gc_sections) |
| 4301 | { |
| 4302 | /* Garbage collection needs some extra help with .opd sections. |
| 4303 | We don't want to necessarily keep everything referenced by |
| 4304 | relocs in .opd, as that would keep all functions. Instead, |
| 4305 | if we reference an .opd symbol (a function descriptor), we |
| 4306 | want to keep the function code symbol's section. This is |
| 4307 | easy for global symbols, but for local syms we need to keep |
| 4308 | information about the associated function section. */ |
| 4309 | bfd_size_type amt; |
| 4310 | asection **opd_sym_map; |
| 4311 | Elf_Internal_Shdr *symtab_hdr; |
| 4312 | Elf_Internal_Rela *relocs, *rel_end, *rel; |
| 4313 | |
| 4314 | amt = OPD_NDX (opd->size) * sizeof (*opd_sym_map); |
| 4315 | opd_sym_map = bfd_zalloc (ibfd, amt); |
| 4316 | if (opd_sym_map == NULL) |
| 4317 | return FALSE; |
| 4318 | ppc64_elf_section_data (opd)->u.opd.func_sec = opd_sym_map; |
| 4319 | relocs = _bfd_elf_link_read_relocs (ibfd, opd, NULL, NULL, |
| 4320 | info->keep_memory); |
| 4321 | if (relocs == NULL) |
| 4322 | return FALSE; |
| 4323 | symtab_hdr = &elf_symtab_hdr (ibfd); |
| 4324 | rel_end = relocs + opd->reloc_count - 1; |
| 4325 | for (rel = relocs; rel < rel_end; rel++) |
| 4326 | { |
| 4327 | enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info); |
| 4328 | unsigned long r_symndx = ELF64_R_SYM (rel->r_info); |
| 4329 | |
| 4330 | if (r_type == R_PPC64_ADDR64 |
| 4331 | && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC |
| 4332 | && r_symndx < symtab_hdr->sh_info) |
| 4333 | { |
| 4334 | Elf_Internal_Sym *isym; |
| 4335 | asection *s; |
| 4336 | |
| 4337 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, r_symndx); |
| 4338 | if (isym == NULL) |
| 4339 | { |
| 4340 | if (elf_section_data (opd)->relocs != relocs) |
| 4341 | free (relocs); |
| 4342 | return FALSE; |
| 4343 | } |
| 4344 | |
| 4345 | s = bfd_section_from_elf_index (ibfd, isym->st_shndx); |
| 4346 | if (s != NULL && s != opd) |
| 4347 | opd_sym_map[OPD_NDX (rel->r_offset)] = s; |
| 4348 | } |
| 4349 | } |
| 4350 | if (elf_section_data (opd)->relocs != relocs) |
| 4351 | free (relocs); |
| 4352 | } |
| 4353 | |
| 4354 | p = &htab->dot_syms; |
| 4355 | while ((eh = *p) != NULL) |
| 4356 | { |
| 4357 | *p = NULL; |
| 4358 | if (&eh->elf == htab->elf.hgot) |
| 4359 | ; |
| 4360 | else if (htab->elf.hgot == NULL |
| 4361 | && strcmp (eh->elf.root.root.string, ".TOC.") == 0) |
| 4362 | htab->elf.hgot = &eh->elf; |
| 4363 | else if (abiversion (ibfd) <= 1) |
| 4364 | { |
| 4365 | htab->need_func_desc_adj = 1; |
| 4366 | if (!add_symbol_adjust (eh, info)) |
| 4367 | return FALSE; |
| 4368 | } |
| 4369 | p = &eh->u.next_dot_sym; |
| 4370 | } |
| 4371 | return TRUE; |
| 4372 | } |
| 4373 | |
| 4374 | /* Undo hash table changes when an --as-needed input file is determined |
| 4375 | not to be needed. */ |
| 4376 | |
| 4377 | static bfd_boolean |
| 4378 | ppc64_elf_notice_as_needed (bfd *ibfd, |
| 4379 | struct bfd_link_info *info, |
| 4380 | enum notice_asneeded_action act) |
| 4381 | { |
| 4382 | if (act == notice_not_needed) |
| 4383 | { |
| 4384 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
| 4385 | |
| 4386 | if (htab == NULL) |
| 4387 | return FALSE; |
| 4388 | |
| 4389 | htab->dot_syms = NULL; |
| 4390 | } |
| 4391 | return _bfd_elf_notice_as_needed (ibfd, info, act); |
| 4392 | } |
| 4393 | |
| 4394 | /* If --just-symbols against a final linked binary, then assume we need |
| 4395 | toc adjusting stubs when calling functions defined there. */ |
| 4396 | |
| 4397 | static void |
| 4398 | ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info) |
| 4399 | { |
| 4400 | if ((sec->flags & SEC_CODE) != 0 |
| 4401 | && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0 |
| 4402 | && is_ppc64_elf (sec->owner)) |
| 4403 | { |
| 4404 | if (abiversion (sec->owner) >= 2 |
| 4405 | || bfd_get_section_by_name (sec->owner, ".opd") != NULL) |
| 4406 | sec->has_toc_reloc = 1; |
| 4407 | } |
| 4408 | _bfd_elf_link_just_syms (sec, info); |
| 4409 | } |
| 4410 | |
| 4411 | static struct plt_entry ** |
| 4412 | update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr, |
| 4413 | unsigned long r_symndx, bfd_vma r_addend, int tls_type) |
| 4414 | { |
| 4415 | struct got_entry **local_got_ents = elf_local_got_ents (abfd); |
| 4416 | struct plt_entry **local_plt; |
| 4417 | unsigned char *local_got_tls_masks; |
| 4418 | |
| 4419 | if (local_got_ents == NULL) |
| 4420 | { |
| 4421 | bfd_size_type size = symtab_hdr->sh_info; |
| 4422 | |
| 4423 | size *= (sizeof (*local_got_ents) |
| 4424 | + sizeof (*local_plt) |
| 4425 | + sizeof (*local_got_tls_masks)); |
| 4426 | local_got_ents = bfd_zalloc (abfd, size); |
| 4427 | if (local_got_ents == NULL) |
| 4428 | return NULL; |
| 4429 | elf_local_got_ents (abfd) = local_got_ents; |
| 4430 | } |
| 4431 | |
| 4432 | if ((tls_type & (NON_GOT | TLS_EXPLICIT)) == 0) |
| 4433 | { |
| 4434 | struct got_entry *ent; |
| 4435 | |
| 4436 | for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next) |
| 4437 | if (ent->addend == r_addend |
| 4438 | && ent->owner == abfd |
| 4439 | && ent->tls_type == tls_type) |
| 4440 | break; |
| 4441 | if (ent == NULL) |
| 4442 | { |
| 4443 | size_t amt = sizeof (*ent); |
| 4444 | ent = bfd_alloc (abfd, amt); |
| 4445 | if (ent == NULL) |
| 4446 | return FALSE; |
| 4447 | ent->next = local_got_ents[r_symndx]; |
| 4448 | ent->addend = r_addend; |
| 4449 | ent->owner = abfd; |
| 4450 | ent->tls_type = tls_type; |
| 4451 | ent->is_indirect = FALSE; |
| 4452 | ent->got.refcount = 0; |
| 4453 | local_got_ents[r_symndx] = ent; |
| 4454 | } |
| 4455 | ent->got.refcount += 1; |
| 4456 | } |
| 4457 | |
| 4458 | local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info); |
| 4459 | local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info); |
| 4460 | local_got_tls_masks[r_symndx] |= tls_type & 0xff; |
| 4461 | |
| 4462 | return local_plt + r_symndx; |
| 4463 | } |
| 4464 | |
| 4465 | static bfd_boolean |
| 4466 | update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend) |
| 4467 | { |
| 4468 | struct plt_entry *ent; |
| 4469 | |
| 4470 | for (ent = *plist; ent != NULL; ent = ent->next) |
| 4471 | if (ent->addend == addend) |
| 4472 | break; |
| 4473 | if (ent == NULL) |
| 4474 | { |
| 4475 | size_t amt = sizeof (*ent); |
| 4476 | ent = bfd_alloc (abfd, amt); |
| 4477 | if (ent == NULL) |
| 4478 | return FALSE; |
| 4479 | ent->next = *plist; |
| 4480 | ent->addend = addend; |
| 4481 | ent->plt.refcount = 0; |
| 4482 | *plist = ent; |
| 4483 | } |
| 4484 | ent->plt.refcount += 1; |
| 4485 | return TRUE; |
| 4486 | } |
| 4487 | |
| 4488 | static bfd_boolean |
| 4489 | is_branch_reloc (enum elf_ppc64_reloc_type r_type) |
| 4490 | { |
| 4491 | return (r_type == R_PPC64_REL24 |
| 4492 | || r_type == R_PPC64_REL24_NOTOC |
| 4493 | || r_type == R_PPC64_REL14 |
| 4494 | || r_type == R_PPC64_REL14_BRTAKEN |
| 4495 | || r_type == R_PPC64_REL14_BRNTAKEN |
| 4496 | || r_type == R_PPC64_ADDR24 |
| 4497 | || r_type == R_PPC64_ADDR14 |
| 4498 | || r_type == R_PPC64_ADDR14_BRTAKEN |
| 4499 | || r_type == R_PPC64_ADDR14_BRNTAKEN |
| 4500 | || r_type == R_PPC64_PLTCALL |
| 4501 | || r_type == R_PPC64_PLTCALL_NOTOC); |
| 4502 | } |
| 4503 | |
| 4504 | /* Relocs on inline plt call sequence insns prior to the call. */ |
| 4505 | |
| 4506 | static bfd_boolean |
| 4507 | is_plt_seq_reloc (enum elf_ppc64_reloc_type r_type) |
| 4508 | { |
| 4509 | return (r_type == R_PPC64_PLT16_HA |
| 4510 | || r_type == R_PPC64_PLT16_HI |
| 4511 | || r_type == R_PPC64_PLT16_LO |
| 4512 | || r_type == R_PPC64_PLT16_LO_DS |
| 4513 | || r_type == R_PPC64_PLT_PCREL34 |
| 4514 | || r_type == R_PPC64_PLT_PCREL34_NOTOC |
| 4515 | || r_type == R_PPC64_PLTSEQ |
| 4516 | || r_type == R_PPC64_PLTSEQ_NOTOC); |
| 4517 | } |
| 4518 | |
| 4519 | /* Look through the relocs for a section during the first phase, and |
| 4520 | calculate needed space in the global offset table, procedure |
| 4521 | linkage table, and dynamic reloc sections. */ |
| 4522 | |
| 4523 | static bfd_boolean |
| 4524 | ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info, |
| 4525 | asection *sec, const Elf_Internal_Rela *relocs) |
| 4526 | { |
| 4527 | struct ppc_link_hash_table *htab; |
| 4528 | Elf_Internal_Shdr *symtab_hdr; |
| 4529 | struct elf_link_hash_entry **sym_hashes; |
| 4530 | const Elf_Internal_Rela *rel; |
| 4531 | const Elf_Internal_Rela *rel_end; |
| 4532 | asection *sreloc; |
| 4533 | struct elf_link_hash_entry *tga, *dottga; |
| 4534 | bfd_boolean is_opd; |
| 4535 | |
| 4536 | if (bfd_link_relocatable (info)) |
| 4537 | return TRUE; |
| 4538 | |
| 4539 | /* Don't do anything special with non-loaded, non-alloced sections. |
| 4540 | In particular, any relocs in such sections should not affect GOT |
| 4541 | and PLT reference counting (ie. we don't allow them to create GOT |
| 4542 | or PLT entries), there's no possibility or desire to optimize TLS |
| 4543 | relocs, and there's not much point in propagating relocs to shared |
| 4544 | libs that the dynamic linker won't relocate. */ |
| 4545 | if ((sec->flags & SEC_ALLOC) == 0) |
| 4546 | return TRUE; |
| 4547 | |
| 4548 | BFD_ASSERT (is_ppc64_elf (abfd)); |
| 4549 | |
| 4550 | htab = ppc_hash_table (info); |
| 4551 | if (htab == NULL) |
| 4552 | return FALSE; |
| 4553 | |
| 4554 | tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr", |
| 4555 | FALSE, FALSE, TRUE); |
| 4556 | dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr", |
| 4557 | FALSE, FALSE, TRUE); |
| 4558 | symtab_hdr = &elf_symtab_hdr (abfd); |
| 4559 | sym_hashes = elf_sym_hashes (abfd); |
| 4560 | sreloc = NULL; |
| 4561 | is_opd = ppc64_elf_section_data (sec)->sec_type == sec_opd; |
| 4562 | rel_end = relocs + sec->reloc_count; |
| 4563 | for (rel = relocs; rel < rel_end; rel++) |
| 4564 | { |
| 4565 | unsigned long r_symndx; |
| 4566 | struct elf_link_hash_entry *h; |
| 4567 | enum elf_ppc64_reloc_type r_type; |
| 4568 | int tls_type; |
| 4569 | struct _ppc64_elf_section_data *ppc64_sec; |
| 4570 | struct plt_entry **ifunc, **plt_list; |
| 4571 | |
| 4572 | r_symndx = ELF64_R_SYM (rel->r_info); |
| 4573 | if (r_symndx < symtab_hdr->sh_info) |
| 4574 | h = NULL; |
| 4575 | else |
| 4576 | { |
| 4577 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 4578 | h = elf_follow_link (h); |
| 4579 | |
| 4580 | if (h == htab->elf.hgot) |
| 4581 | sec->has_toc_reloc = 1; |
| 4582 | } |
| 4583 | |
| 4584 | r_type = ELF64_R_TYPE (rel->r_info); |
| 4585 | switch (r_type) |
| 4586 | { |
| 4587 | case R_PPC64_D34: |
| 4588 | case R_PPC64_D34_LO: |
| 4589 | case R_PPC64_D34_HI30: |
| 4590 | case R_PPC64_D34_HA30: |
| 4591 | case R_PPC64_D28: |
| 4592 | case R_PPC64_TPREL34: |
| 4593 | case R_PPC64_DTPREL34: |
| 4594 | case R_PPC64_PCREL34: |
| 4595 | case R_PPC64_GOT_PCREL34: |
| 4596 | case R_PPC64_GOT_TLSGD34: |
| 4597 | case R_PPC64_GOT_TLSLD34: |
| 4598 | case R_PPC64_GOT_TPREL34: |
| 4599 | case R_PPC64_GOT_DTPREL34: |
| 4600 | case R_PPC64_PLT_PCREL34: |
| 4601 | case R_PPC64_PLT_PCREL34_NOTOC: |
| 4602 | case R_PPC64_PCREL28: |
| 4603 | htab->power10_stubs = 1; |
| 4604 | break; |
| 4605 | default: |
| 4606 | break; |
| 4607 | } |
| 4608 | |
| 4609 | switch (r_type) |
| 4610 | { |
| 4611 | case R_PPC64_PLT16_HA: |
| 4612 | case R_PPC64_GOT_TLSLD16_HA: |
| 4613 | case R_PPC64_GOT_TLSGD16_HA: |
| 4614 | case R_PPC64_GOT_TPREL16_HA: |
| 4615 | case R_PPC64_GOT_DTPREL16_HA: |
| 4616 | case R_PPC64_GOT16_HA: |
| 4617 | case R_PPC64_TOC16_HA: |
| 4618 | case R_PPC64_PLT16_LO: |
| 4619 | case R_PPC64_PLT16_LO_DS: |
| 4620 | case R_PPC64_GOT_TLSLD16_LO: |
| 4621 | case R_PPC64_GOT_TLSGD16_LO: |
| 4622 | case R_PPC64_GOT_TPREL16_LO_DS: |
| 4623 | case R_PPC64_GOT_DTPREL16_LO_DS: |
| 4624 | case R_PPC64_GOT16_LO: |
| 4625 | case R_PPC64_GOT16_LO_DS: |
| 4626 | case R_PPC64_TOC16_LO: |
| 4627 | case R_PPC64_TOC16_LO_DS: |
| 4628 | case R_PPC64_GOT_PCREL34: |
| 4629 | ppc64_elf_tdata (abfd)->has_optrel = 1; |
| 4630 | ppc64_elf_section_data (sec)->has_optrel = 1; |
| 4631 | break; |
| 4632 | default: |
| 4633 | break; |
| 4634 | } |
| 4635 | |
| 4636 | ifunc = NULL; |
| 4637 | if (h != NULL) |
| 4638 | { |
| 4639 | if (h->type == STT_GNU_IFUNC) |
| 4640 | { |
| 4641 | h->needs_plt = 1; |
| 4642 | ifunc = &h->plt.plist; |
| 4643 | } |
| 4644 | } |
| 4645 | else |
| 4646 | { |
| 4647 | Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
| 4648 | abfd, r_symndx); |
| 4649 | if (isym == NULL) |
| 4650 | return FALSE; |
| 4651 | |
| 4652 | if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
| 4653 | { |
| 4654 | ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx, |
| 4655 | rel->r_addend, |
| 4656 | NON_GOT | PLT_IFUNC); |
| 4657 | if (ifunc == NULL) |
| 4658 | return FALSE; |
| 4659 | } |
| 4660 | } |
| 4661 | |
| 4662 | tls_type = 0; |
| 4663 | switch (r_type) |
| 4664 | { |
| 4665 | case R_PPC64_TLSGD: |
| 4666 | case R_PPC64_TLSLD: |
| 4667 | /* These special tls relocs tie a call to __tls_get_addr with |
| 4668 | its parameter symbol. */ |
| 4669 | if (h != NULL) |
| 4670 | ppc_elf_hash_entry (h)->tls_mask |= TLS_TLS | TLS_MARK; |
| 4671 | else |
| 4672 | if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, |
| 4673 | rel->r_addend, |
| 4674 | NON_GOT | TLS_TLS | TLS_MARK)) |
| 4675 | return FALSE; |
| 4676 | sec->has_tls_reloc = 1; |
| 4677 | break; |
| 4678 | |
| 4679 | case R_PPC64_GOT_TLSLD16: |
| 4680 | case R_PPC64_GOT_TLSLD16_LO: |
| 4681 | case R_PPC64_GOT_TLSLD16_HI: |
| 4682 | case R_PPC64_GOT_TLSLD16_HA: |
| 4683 | case R_PPC64_GOT_TLSLD34: |
| 4684 | tls_type = TLS_TLS | TLS_LD; |
| 4685 | goto dogottls; |
| 4686 | |
| 4687 | case R_PPC64_GOT_TLSGD16: |
| 4688 | case R_PPC64_GOT_TLSGD16_LO: |
| 4689 | case R_PPC64_GOT_TLSGD16_HI: |
| 4690 | case R_PPC64_GOT_TLSGD16_HA: |
| 4691 | case R_PPC64_GOT_TLSGD34: |
| 4692 | tls_type = TLS_TLS | TLS_GD; |
| 4693 | goto dogottls; |
| 4694 | |
| 4695 | case R_PPC64_GOT_TPREL16_DS: |
| 4696 | case R_PPC64_GOT_TPREL16_LO_DS: |
| 4697 | case R_PPC64_GOT_TPREL16_HI: |
| 4698 | case R_PPC64_GOT_TPREL16_HA: |
| 4699 | case R_PPC64_GOT_TPREL34: |
| 4700 | if (bfd_link_dll (info)) |
| 4701 | info->flags |= DF_STATIC_TLS; |
| 4702 | tls_type = TLS_TLS | TLS_TPREL; |
| 4703 | goto dogottls; |
| 4704 | |
| 4705 | case R_PPC64_GOT_DTPREL16_DS: |
| 4706 | case R_PPC64_GOT_DTPREL16_LO_DS: |
| 4707 | case R_PPC64_GOT_DTPREL16_HI: |
| 4708 | case R_PPC64_GOT_DTPREL16_HA: |
| 4709 | case R_PPC64_GOT_DTPREL34: |
| 4710 | tls_type = TLS_TLS | TLS_DTPREL; |
| 4711 | dogottls: |
| 4712 | sec->has_tls_reloc = 1; |
| 4713 | goto dogot; |
| 4714 | |
| 4715 | case R_PPC64_GOT16: |
| 4716 | case R_PPC64_GOT16_LO: |
| 4717 | case R_PPC64_GOT16_HI: |
| 4718 | case R_PPC64_GOT16_HA: |
| 4719 | case R_PPC64_GOT16_DS: |
| 4720 | case R_PPC64_GOT16_LO_DS: |
| 4721 | case R_PPC64_GOT_PCREL34: |
| 4722 | dogot: |
| 4723 | /* This symbol requires a global offset table entry. */ |
| 4724 | sec->has_toc_reloc = 1; |
| 4725 | if (r_type == R_PPC64_GOT_TLSLD16 |
| 4726 | || r_type == R_PPC64_GOT_TLSGD16 |
| 4727 | || r_type == R_PPC64_GOT_TPREL16_DS |
| 4728 | || r_type == R_PPC64_GOT_DTPREL16_DS |
| 4729 | || r_type == R_PPC64_GOT16 |
| 4730 | || r_type == R_PPC64_GOT16_DS) |
| 4731 | { |
| 4732 | htab->do_multi_toc = 1; |
| 4733 | ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1; |
| 4734 | } |
| 4735 | |
| 4736 | if (ppc64_elf_tdata (abfd)->got == NULL |
| 4737 | && !create_got_section (abfd, info)) |
| 4738 | return FALSE; |
| 4739 | |
| 4740 | if (h != NULL) |
| 4741 | { |
| 4742 | struct ppc_link_hash_entry *eh; |
| 4743 | struct got_entry *ent; |
| 4744 | |
| 4745 | eh = ppc_elf_hash_entry (h); |
| 4746 | for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next) |
| 4747 | if (ent->addend == rel->r_addend |
| 4748 | && ent->owner == abfd |
| 4749 | && ent->tls_type == tls_type) |
| 4750 | break; |
| 4751 | if (ent == NULL) |
| 4752 | { |
| 4753 | size_t amt = sizeof (*ent); |
| 4754 | ent = bfd_alloc (abfd, amt); |
| 4755 | if (ent == NULL) |
| 4756 | return FALSE; |
| 4757 | ent->next = eh->elf.got.glist; |
| 4758 | ent->addend = rel->r_addend; |
| 4759 | ent->owner = abfd; |
| 4760 | ent->tls_type = tls_type; |
| 4761 | ent->is_indirect = FALSE; |
| 4762 | ent->got.refcount = 0; |
| 4763 | eh->elf.got.glist = ent; |
| 4764 | } |
| 4765 | ent->got.refcount += 1; |
| 4766 | eh->tls_mask |= tls_type; |
| 4767 | } |
| 4768 | else |
| 4769 | /* This is a global offset table entry for a local symbol. */ |
| 4770 | if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, |
| 4771 | rel->r_addend, tls_type)) |
| 4772 | return FALSE; |
| 4773 | break; |
| 4774 | |
| 4775 | case R_PPC64_PLT16_HA: |
| 4776 | case R_PPC64_PLT16_HI: |
| 4777 | case R_PPC64_PLT16_LO: |
| 4778 | case R_PPC64_PLT16_LO_DS: |
| 4779 | case R_PPC64_PLT_PCREL34: |
| 4780 | case R_PPC64_PLT_PCREL34_NOTOC: |
| 4781 | case R_PPC64_PLT32: |
| 4782 | case R_PPC64_PLT64: |
| 4783 | /* This symbol requires a procedure linkage table entry. */ |
| 4784 | plt_list = ifunc; |
| 4785 | if (h != NULL) |
| 4786 | { |
| 4787 | h->needs_plt = 1; |
| 4788 | if (h->root.root.string[0] == '.' |
| 4789 | && h->root.root.string[1] != '\0') |
| 4790 | ppc_elf_hash_entry (h)->is_func = 1; |
| 4791 | ppc_elf_hash_entry (h)->tls_mask |= PLT_KEEP; |
| 4792 | plt_list = &h->plt.plist; |
| 4793 | } |
| 4794 | if (plt_list == NULL) |
| 4795 | plt_list = update_local_sym_info (abfd, symtab_hdr, r_symndx, |
| 4796 | rel->r_addend, |
| 4797 | NON_GOT | PLT_KEEP); |
| 4798 | if (!update_plt_info (abfd, plt_list, rel->r_addend)) |
| 4799 | return FALSE; |
| 4800 | break; |
| 4801 | |
| 4802 | /* The following relocations don't need to propagate the |
| 4803 | relocation if linking a shared object since they are |
| 4804 | section relative. */ |
| 4805 | case R_PPC64_SECTOFF: |
| 4806 | case R_PPC64_SECTOFF_LO: |
| 4807 | case R_PPC64_SECTOFF_HI: |
| 4808 | case R_PPC64_SECTOFF_HA: |
| 4809 | case R_PPC64_SECTOFF_DS: |
| 4810 | case R_PPC64_SECTOFF_LO_DS: |
| 4811 | case R_PPC64_DTPREL16: |
| 4812 | case R_PPC64_DTPREL16_LO: |
| 4813 | case R_PPC64_DTPREL16_HI: |
| 4814 | case R_PPC64_DTPREL16_HA: |
| 4815 | case R_PPC64_DTPREL16_DS: |
| 4816 | case R_PPC64_DTPREL16_LO_DS: |
| 4817 | case R_PPC64_DTPREL16_HIGH: |
| 4818 | case R_PPC64_DTPREL16_HIGHA: |
| 4819 | case R_PPC64_DTPREL16_HIGHER: |
| 4820 | case R_PPC64_DTPREL16_HIGHERA: |
| 4821 | case R_PPC64_DTPREL16_HIGHEST: |
| 4822 | case R_PPC64_DTPREL16_HIGHESTA: |
| 4823 | break; |
| 4824 | |
| 4825 | /* Nor do these. */ |
| 4826 | case R_PPC64_REL16: |
| 4827 | case R_PPC64_REL16_LO: |
| 4828 | case R_PPC64_REL16_HI: |
| 4829 | case R_PPC64_REL16_HA: |
| 4830 | case R_PPC64_REL16_HIGH: |
| 4831 | case R_PPC64_REL16_HIGHA: |
| 4832 | case R_PPC64_REL16_HIGHER: |
| 4833 | case R_PPC64_REL16_HIGHERA: |
| 4834 | case R_PPC64_REL16_HIGHEST: |
| 4835 | case R_PPC64_REL16_HIGHESTA: |
| 4836 | case R_PPC64_REL16_HIGHER34: |
| 4837 | case R_PPC64_REL16_HIGHERA34: |
| 4838 | case R_PPC64_REL16_HIGHEST34: |
| 4839 | case R_PPC64_REL16_HIGHESTA34: |
| 4840 | case R_PPC64_REL16DX_HA: |
| 4841 | break; |
| 4842 | |
| 4843 | /* Not supported as a dynamic relocation. */ |
| 4844 | case R_PPC64_ADDR64_LOCAL: |
| 4845 | if (bfd_link_pic (info)) |
| 4846 | { |
| 4847 | if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) |
| 4848 | ppc_howto_init (); |
| 4849 | /* xgettext:c-format */ |
| 4850 | info->callbacks->einfo (_("%H: %s reloc unsupported " |
| 4851 | "in shared libraries and PIEs\n"), |
| 4852 | abfd, sec, rel->r_offset, |
| 4853 | ppc64_elf_howto_table[r_type]->name); |
| 4854 | bfd_set_error (bfd_error_bad_value); |
| 4855 | return FALSE; |
| 4856 | } |
| 4857 | break; |
| 4858 | |
| 4859 | case R_PPC64_TOC16: |
| 4860 | case R_PPC64_TOC16_DS: |
| 4861 | htab->do_multi_toc = 1; |
| 4862 | ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1; |
| 4863 | /* Fall through. */ |
| 4864 | case R_PPC64_TOC16_LO: |
| 4865 | case R_PPC64_TOC16_HI: |
| 4866 | case R_PPC64_TOC16_HA: |
| 4867 | case R_PPC64_TOC16_LO_DS: |
| 4868 | sec->has_toc_reloc = 1; |
| 4869 | if (h != NULL && bfd_link_executable (info)) |
| 4870 | { |
| 4871 | /* We may need a copy reloc. */ |
| 4872 | h->non_got_ref = 1; |
| 4873 | /* Strongly prefer a copy reloc over a dynamic reloc. |
| 4874 | glibc ld.so as of 2019-08 will error out if one of |
| 4875 | these relocations is emitted. */ |
| 4876 | h->needs_copy = 1; |
| 4877 | goto dodyn; |
| 4878 | } |
| 4879 | break; |
| 4880 | |
| 4881 | /* Marker reloc. */ |
| 4882 | case R_PPC64_ENTRY: |
| 4883 | break; |
| 4884 | |
| 4885 | /* This relocation describes the C++ object vtable hierarchy. |
| 4886 | Reconstruct it for later use during GC. */ |
| 4887 | case R_PPC64_GNU_VTINHERIT: |
| 4888 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
| 4889 | return FALSE; |
| 4890 | break; |
| 4891 | |
| 4892 | /* This relocation describes which C++ vtable entries are actually |
| 4893 | used. Record for later use during GC. */ |
| 4894 | case R_PPC64_GNU_VTENTRY: |
| 4895 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
| 4896 | return FALSE; |
| 4897 | break; |
| 4898 | |
| 4899 | case R_PPC64_REL14: |
| 4900 | case R_PPC64_REL14_BRTAKEN: |
| 4901 | case R_PPC64_REL14_BRNTAKEN: |
| 4902 | { |
| 4903 | asection *dest = NULL; |
| 4904 | |
| 4905 | /* Heuristic: If jumping outside our section, chances are |
| 4906 | we are going to need a stub. */ |
| 4907 | if (h != NULL) |
| 4908 | { |
| 4909 | /* If the sym is weak it may be overridden later, so |
| 4910 | don't assume we know where a weak sym lives. */ |
| 4911 | if (h->root.type == bfd_link_hash_defined) |
| 4912 | dest = h->root.u.def.section; |
| 4913 | } |
| 4914 | else |
| 4915 | { |
| 4916 | Elf_Internal_Sym *isym; |
| 4917 | |
| 4918 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
| 4919 | abfd, r_symndx); |
| 4920 | if (isym == NULL) |
| 4921 | return FALSE; |
| 4922 | |
| 4923 | dest = bfd_section_from_elf_index (abfd, isym->st_shndx); |
| 4924 | } |
| 4925 | |
| 4926 | if (dest != sec) |
| 4927 | ppc64_elf_section_data (sec)->has_14bit_branch = 1; |
| 4928 | } |
| 4929 | goto rel24; |
| 4930 | |
| 4931 | case R_PPC64_PLTCALL: |
| 4932 | case R_PPC64_PLTCALL_NOTOC: |
| 4933 | ppc64_elf_section_data (sec)->has_pltcall = 1; |
| 4934 | /* Fall through. */ |
| 4935 | |
| 4936 | case R_PPC64_REL24: |
| 4937 | case R_PPC64_REL24_NOTOC: |
| 4938 | rel24: |
| 4939 | plt_list = ifunc; |
| 4940 | if (h != NULL) |
| 4941 | { |
| 4942 | h->needs_plt = 1; |
| 4943 | if (h->root.root.string[0] == '.' |
| 4944 | && h->root.root.string[1] != '\0') |
| 4945 | ppc_elf_hash_entry (h)->is_func = 1; |
| 4946 | |
| 4947 | if (h == tga || h == dottga) |
| 4948 | { |
| 4949 | sec->has_tls_reloc = 1; |
| 4950 | if (rel != relocs |
| 4951 | && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD |
| 4952 | || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD)) |
| 4953 | /* We have a new-style __tls_get_addr call with |
| 4954 | a marker reloc. */ |
| 4955 | ; |
| 4956 | else |
| 4957 | /* Mark this section as having an old-style call. */ |
| 4958 | sec->nomark_tls_get_addr = 1; |
| 4959 | } |
| 4960 | plt_list = &h->plt.plist; |
| 4961 | } |
| 4962 | |
| 4963 | /* We may need a .plt entry if the function this reloc |
| 4964 | refers to is in a shared lib. */ |
| 4965 | if (plt_list |
| 4966 | && !update_plt_info (abfd, plt_list, rel->r_addend)) |
| 4967 | return FALSE; |
| 4968 | break; |
| 4969 | |
| 4970 | case R_PPC64_ADDR14: |
| 4971 | case R_PPC64_ADDR14_BRNTAKEN: |
| 4972 | case R_PPC64_ADDR14_BRTAKEN: |
| 4973 | case R_PPC64_ADDR24: |
| 4974 | goto dodyn; |
| 4975 | |
| 4976 | case R_PPC64_TPREL64: |
| 4977 | tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL; |
| 4978 | if (bfd_link_dll (info)) |
| 4979 | info->flags |= DF_STATIC_TLS; |
| 4980 | goto dotlstoc; |
| 4981 | |
| 4982 | case R_PPC64_DTPMOD64: |
| 4983 | if (rel + 1 < rel_end |
| 4984 | && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64) |
| 4985 | && rel[1].r_offset == rel->r_offset + 8) |
| 4986 | tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD; |
| 4987 | else |
| 4988 | tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD; |
| 4989 | goto dotlstoc; |
| 4990 | |
| 4991 | case R_PPC64_DTPREL64: |
| 4992 | tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL; |
| 4993 | if (rel != relocs |
| 4994 | && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64) |
| 4995 | && rel[-1].r_offset == rel->r_offset - 8) |
| 4996 | /* This is the second reloc of a dtpmod, dtprel pair. |
| 4997 | Don't mark with TLS_DTPREL. */ |
| 4998 | goto dodyn; |
| 4999 | |
| 5000 | dotlstoc: |
| 5001 | sec->has_tls_reloc = 1; |
| 5002 | if (h != NULL) |
| 5003 | ppc_elf_hash_entry (h)->tls_mask |= tls_type & 0xff; |
| 5004 | else |
| 5005 | if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, |
| 5006 | rel->r_addend, tls_type)) |
| 5007 | return FALSE; |
| 5008 | |
| 5009 | ppc64_sec = ppc64_elf_section_data (sec); |
| 5010 | if (ppc64_sec->sec_type != sec_toc) |
| 5011 | { |
| 5012 | bfd_size_type amt; |
| 5013 | |
| 5014 | /* One extra to simplify get_tls_mask. */ |
| 5015 | amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned); |
| 5016 | ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt); |
| 5017 | if (ppc64_sec->u.toc.symndx == NULL) |
| 5018 | return FALSE; |
| 5019 | amt = sec->size * sizeof (bfd_vma) / 8; |
| 5020 | ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt); |
| 5021 | if (ppc64_sec->u.toc.add == NULL) |
| 5022 | return FALSE; |
| 5023 | BFD_ASSERT (ppc64_sec->sec_type == sec_normal); |
| 5024 | ppc64_sec->sec_type = sec_toc; |
| 5025 | } |
| 5026 | BFD_ASSERT (rel->r_offset % 8 == 0); |
| 5027 | ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx; |
| 5028 | ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend; |
| 5029 | |
| 5030 | /* Mark the second slot of a GD or LD entry. |
| 5031 | -1 to indicate GD and -2 to indicate LD. */ |
| 5032 | if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD)) |
| 5033 | ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1; |
| 5034 | else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD)) |
| 5035 | ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2; |
| 5036 | goto dodyn; |
| 5037 | |
| 5038 | case R_PPC64_TPREL16: |
| 5039 | case R_PPC64_TPREL16_LO: |
| 5040 | case R_PPC64_TPREL16_HI: |
| 5041 | case R_PPC64_TPREL16_HA: |
| 5042 | case R_PPC64_TPREL16_DS: |
| 5043 | case R_PPC64_TPREL16_LO_DS: |
| 5044 | case R_PPC64_TPREL16_HIGH: |
| 5045 | case R_PPC64_TPREL16_HIGHA: |
| 5046 | case R_PPC64_TPREL16_HIGHER: |
| 5047 | case R_PPC64_TPREL16_HIGHERA: |
| 5048 | case R_PPC64_TPREL16_HIGHEST: |
| 5049 | case R_PPC64_TPREL16_HIGHESTA: |
| 5050 | case R_PPC64_TPREL34: |
| 5051 | if (bfd_link_dll (info)) |
| 5052 | info->flags |= DF_STATIC_TLS; |
| 5053 | goto dodyn; |
| 5054 | |
| 5055 | case R_PPC64_ADDR64: |
| 5056 | if (is_opd |
| 5057 | && rel + 1 < rel_end |
| 5058 | && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC) |
| 5059 | { |
| 5060 | if (h != NULL) |
| 5061 | ppc_elf_hash_entry (h)->is_func = 1; |
| 5062 | } |
| 5063 | /* Fall through. */ |
| 5064 | |
| 5065 | case R_PPC64_ADDR16: |
| 5066 | case R_PPC64_ADDR16_DS: |
| 5067 | case R_PPC64_ADDR16_HA: |
| 5068 | case R_PPC64_ADDR16_HI: |
| 5069 | case R_PPC64_ADDR16_HIGH: |
| 5070 | case R_PPC64_ADDR16_HIGHA: |
| 5071 | case R_PPC64_ADDR16_HIGHER: |
| 5072 | case R_PPC64_ADDR16_HIGHERA: |
| 5073 | case R_PPC64_ADDR16_HIGHEST: |
| 5074 | case R_PPC64_ADDR16_HIGHESTA: |
| 5075 | case R_PPC64_ADDR16_LO: |
| 5076 | case R_PPC64_ADDR16_LO_DS: |
| 5077 | case R_PPC64_D34: |
| 5078 | case R_PPC64_D34_LO: |
| 5079 | case R_PPC64_D34_HI30: |
| 5080 | case R_PPC64_D34_HA30: |
| 5081 | case R_PPC64_ADDR16_HIGHER34: |
| 5082 | case R_PPC64_ADDR16_HIGHERA34: |
| 5083 | case R_PPC64_ADDR16_HIGHEST34: |
| 5084 | case R_PPC64_ADDR16_HIGHESTA34: |
| 5085 | case R_PPC64_D28: |
| 5086 | if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1 |
| 5087 | && rel->r_addend == 0) |
| 5088 | { |
| 5089 | /* We may need a .plt entry if this reloc refers to a |
| 5090 | function in a shared lib. */ |
| 5091 | if (!update_plt_info (abfd, &h->plt.plist, 0)) |
| 5092 | return FALSE; |
| 5093 | h->pointer_equality_needed = 1; |
| 5094 | } |
| 5095 | /* Fall through. */ |
| 5096 | |
| 5097 | case R_PPC64_REL30: |
| 5098 | case R_PPC64_REL32: |
| 5099 | case R_PPC64_REL64: |
| 5100 | case R_PPC64_ADDR32: |
| 5101 | case R_PPC64_UADDR16: |
| 5102 | case R_PPC64_UADDR32: |
| 5103 | case R_PPC64_UADDR64: |
| 5104 | case R_PPC64_TOC: |
| 5105 | if (h != NULL && bfd_link_executable (info)) |
| 5106 | /* We may need a copy reloc. */ |
| 5107 | h->non_got_ref = 1; |
| 5108 | |
| 5109 | /* Don't propagate .opd relocs. */ |
| 5110 | if (NO_OPD_RELOCS && is_opd) |
| 5111 | break; |
| 5112 | |
| 5113 | /* If we are creating a shared library, and this is a reloc |
| 5114 | against a global symbol, or a non PC relative reloc |
| 5115 | against a local symbol, then we need to copy the reloc |
| 5116 | into the shared library. However, if we are linking with |
| 5117 | -Bsymbolic, we do not need to copy a reloc against a |
| 5118 | global symbol which is defined in an object we are |
| 5119 | including in the link (i.e., DEF_REGULAR is set). At |
| 5120 | this point we have not seen all the input files, so it is |
| 5121 | possible that DEF_REGULAR is not set now but will be set |
| 5122 | later (it is never cleared). In case of a weak definition, |
| 5123 | DEF_REGULAR may be cleared later by a strong definition in |
| 5124 | a shared library. We account for that possibility below by |
| 5125 | storing information in the dyn_relocs field of the hash |
| 5126 | table entry. A similar situation occurs when creating |
| 5127 | shared libraries and symbol visibility changes render the |
| 5128 | symbol local. |
| 5129 | |
| 5130 | If on the other hand, we are creating an executable, we |
| 5131 | may need to keep relocations for symbols satisfied by a |
| 5132 | dynamic library if we manage to avoid copy relocs for the |
| 5133 | symbol. */ |
| 5134 | dodyn: |
| 5135 | if ((h != NULL |
| 5136 | && (h->root.type == bfd_link_hash_defweak |
| 5137 | || !h->def_regular)) |
| 5138 | || (h != NULL |
| 5139 | && !bfd_link_executable (info) |
| 5140 | && !SYMBOLIC_BIND (info, h)) |
| 5141 | || (bfd_link_pic (info) |
| 5142 | && must_be_dyn_reloc (info, r_type)) |
| 5143 | || (!bfd_link_pic (info) |
| 5144 | && ifunc != NULL)) |
| 5145 | { |
| 5146 | /* We must copy these reloc types into the output file. |
| 5147 | Create a reloc section in dynobj and make room for |
| 5148 | this reloc. */ |
| 5149 | if (sreloc == NULL) |
| 5150 | { |
| 5151 | sreloc = _bfd_elf_make_dynamic_reloc_section |
| 5152 | (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE); |
| 5153 | |
| 5154 | if (sreloc == NULL) |
| 5155 | return FALSE; |
| 5156 | } |
| 5157 | |
| 5158 | /* If this is a global symbol, we count the number of |
| 5159 | relocations we need for this symbol. */ |
| 5160 | if (h != NULL) |
| 5161 | { |
| 5162 | struct elf_dyn_relocs *p; |
| 5163 | struct elf_dyn_relocs **head; |
| 5164 | |
| 5165 | head = &h->dyn_relocs; |
| 5166 | p = *head; |
| 5167 | if (p == NULL || p->sec != sec) |
| 5168 | { |
| 5169 | p = bfd_alloc (htab->elf.dynobj, sizeof *p); |
| 5170 | if (p == NULL) |
| 5171 | return FALSE; |
| 5172 | p->next = *head; |
| 5173 | *head = p; |
| 5174 | p->sec = sec; |
| 5175 | p->count = 0; |
| 5176 | p->pc_count = 0; |
| 5177 | } |
| 5178 | p->count += 1; |
| 5179 | if (!must_be_dyn_reloc (info, r_type)) |
| 5180 | p->pc_count += 1; |
| 5181 | } |
| 5182 | else |
| 5183 | { |
| 5184 | /* Track dynamic relocs needed for local syms too. |
| 5185 | We really need local syms available to do this |
| 5186 | easily. Oh well. */ |
| 5187 | struct ppc_dyn_relocs *p; |
| 5188 | struct ppc_dyn_relocs **head; |
| 5189 | bfd_boolean is_ifunc; |
| 5190 | asection *s; |
| 5191 | void *vpp; |
| 5192 | Elf_Internal_Sym *isym; |
| 5193 | |
| 5194 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
| 5195 | abfd, r_symndx); |
| 5196 | if (isym == NULL) |
| 5197 | return FALSE; |
| 5198 | |
| 5199 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); |
| 5200 | if (s == NULL) |
| 5201 | s = sec; |
| 5202 | |
| 5203 | vpp = &elf_section_data (s)->local_dynrel; |
| 5204 | head = (struct ppc_dyn_relocs **) vpp; |
| 5205 | is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC; |
| 5206 | p = *head; |
| 5207 | if (p != NULL && p->sec == sec && p->ifunc != is_ifunc) |
| 5208 | p = p->next; |
| 5209 | if (p == NULL || p->sec != sec || p->ifunc != is_ifunc) |
| 5210 | { |
| 5211 | p = bfd_alloc (htab->elf.dynobj, sizeof *p); |
| 5212 | if (p == NULL) |
| 5213 | return FALSE; |
| 5214 | p->next = *head; |
| 5215 | *head = p; |
| 5216 | p->sec = sec; |
| 5217 | p->ifunc = is_ifunc; |
| 5218 | p->count = 0; |
| 5219 | } |
| 5220 | p->count += 1; |
| 5221 | } |
| 5222 | } |
| 5223 | break; |
| 5224 | |
| 5225 | default: |
| 5226 | break; |
| 5227 | } |
| 5228 | } |
| 5229 | |
| 5230 | return TRUE; |
| 5231 | } |
| 5232 | |
| 5233 | /* Merge backend specific data from an object file to the output |
| 5234 | object file when linking. */ |
| 5235 | |
| 5236 | static bfd_boolean |
| 5237 | ppc64_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) |
| 5238 | { |
| 5239 | bfd *obfd = info->output_bfd; |
| 5240 | unsigned long iflags, oflags; |
| 5241 | |
| 5242 | if ((ibfd->flags & BFD_LINKER_CREATED) != 0) |
| 5243 | return TRUE; |
| 5244 | |
| 5245 | if (!is_ppc64_elf (ibfd) || !is_ppc64_elf (obfd)) |
| 5246 | return TRUE; |
| 5247 | |
| 5248 | if (!_bfd_generic_verify_endian_match (ibfd, info)) |
| 5249 | return FALSE; |
| 5250 | |
| 5251 | iflags = elf_elfheader (ibfd)->e_flags; |
| 5252 | oflags = elf_elfheader (obfd)->e_flags; |
| 5253 | |
| 5254 | if (iflags & ~EF_PPC64_ABI) |
| 5255 | { |
| 5256 | _bfd_error_handler |
| 5257 | /* xgettext:c-format */ |
| 5258 | (_("%pB uses unknown e_flags 0x%lx"), ibfd, iflags); |
| 5259 | bfd_set_error (bfd_error_bad_value); |
| 5260 | return FALSE; |
| 5261 | } |
| 5262 | else if (iflags != oflags && iflags != 0) |
| 5263 | { |
| 5264 | _bfd_error_handler |
| 5265 | /* xgettext:c-format */ |
| 5266 | (_("%pB: ABI version %ld is not compatible with ABI version %ld output"), |
| 5267 | ibfd, iflags, oflags); |
| 5268 | bfd_set_error (bfd_error_bad_value); |
| 5269 | return FALSE; |
| 5270 | } |
| 5271 | |
| 5272 | if (!_bfd_elf_ppc_merge_fp_attributes (ibfd, info)) |
| 5273 | return FALSE; |
| 5274 | |
| 5275 | /* Merge Tag_compatibility attributes and any common GNU ones. */ |
| 5276 | return _bfd_elf_merge_object_attributes (ibfd, info); |
| 5277 | } |
| 5278 | |
| 5279 | static bfd_boolean |
| 5280 | ppc64_elf_print_private_bfd_data (bfd *abfd, void *ptr) |
| 5281 | { |
| 5282 | /* Print normal ELF private data. */ |
| 5283 | _bfd_elf_print_private_bfd_data (abfd, ptr); |
| 5284 | |
| 5285 | if (elf_elfheader (abfd)->e_flags != 0) |
| 5286 | { |
| 5287 | FILE *file = ptr; |
| 5288 | |
| 5289 | fprintf (file, _("private flags = 0x%lx:"), |
| 5290 | elf_elfheader (abfd)->e_flags); |
| 5291 | |
| 5292 | if ((elf_elfheader (abfd)->e_flags & EF_PPC64_ABI) != 0) |
| 5293 | fprintf (file, _(" [abiv%ld]"), |
| 5294 | elf_elfheader (abfd)->e_flags & EF_PPC64_ABI); |
| 5295 | fputc ('\n', file); |
| 5296 | } |
| 5297 | |
| 5298 | return TRUE; |
| 5299 | } |
| 5300 | |
| 5301 | /* OFFSET in OPD_SEC specifies a function descriptor. Return the address |
| 5302 | of the code entry point, and its section, which must be in the same |
| 5303 | object as OPD_SEC. Returns (bfd_vma) -1 on error. */ |
| 5304 | |
| 5305 | static bfd_vma |
| 5306 | opd_entry_value (asection *opd_sec, |
| 5307 | bfd_vma offset, |
| 5308 | asection **code_sec, |
| 5309 | bfd_vma *code_off, |
| 5310 | bfd_boolean in_code_sec) |
| 5311 | { |
| 5312 | bfd *opd_bfd = opd_sec->owner; |
| 5313 | Elf_Internal_Rela *relocs; |
| 5314 | Elf_Internal_Rela *lo, *hi, *look; |
| 5315 | bfd_vma val; |
| 5316 | |
| 5317 | /* No relocs implies we are linking a --just-symbols object, or looking |
| 5318 | at a final linked executable with addr2line or somesuch. */ |
| 5319 | if (opd_sec->reloc_count == 0) |
| 5320 | { |
| 5321 | bfd_byte *contents = ppc64_elf_tdata (opd_bfd)->opd.contents; |
| 5322 | |
| 5323 | if (contents == NULL) |
| 5324 | { |
| 5325 | if (!bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents)) |
| 5326 | return (bfd_vma) -1; |
| 5327 | ppc64_elf_tdata (opd_bfd)->opd.contents = contents; |
| 5328 | } |
| 5329 | |
| 5330 | /* PR 17512: file: 64b9dfbb. */ |
| 5331 | if (offset + 7 >= opd_sec->size || offset + 7 < offset) |
| 5332 | return (bfd_vma) -1; |
| 5333 | |
| 5334 | val = bfd_get_64 (opd_bfd, contents + offset); |
| 5335 | if (code_sec != NULL) |
| 5336 | { |
| 5337 | asection *sec, *likely = NULL; |
| 5338 | |
| 5339 | if (in_code_sec) |
| 5340 | { |
| 5341 | sec = *code_sec; |
| 5342 | if (sec->vma <= val |
| 5343 | && val < sec->vma + sec->size) |
| 5344 | likely = sec; |
| 5345 | else |
| 5346 | val = -1; |
| 5347 | } |
| 5348 | else |
| 5349 | for (sec = opd_bfd->sections; sec != NULL; sec = sec->next) |
| 5350 | if (sec->vma <= val |
| 5351 | && (sec->flags & SEC_LOAD) != 0 |
| 5352 | && (sec->flags & SEC_ALLOC) != 0) |
| 5353 | likely = sec; |
| 5354 | if (likely != NULL) |
| 5355 | { |
| 5356 | *code_sec = likely; |
| 5357 | if (code_off != NULL) |
| 5358 | *code_off = val - likely->vma; |
| 5359 | } |
| 5360 | } |
| 5361 | return val; |
| 5362 | } |
| 5363 | |
| 5364 | BFD_ASSERT (is_ppc64_elf (opd_bfd)); |
| 5365 | |
| 5366 | relocs = ppc64_elf_tdata (opd_bfd)->opd.relocs; |
| 5367 | if (relocs == NULL) |
| 5368 | relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, TRUE); |
| 5369 | /* PR 17512: file: df8e1fd6. */ |
| 5370 | if (relocs == NULL) |
| 5371 | return (bfd_vma) -1; |
| 5372 | |
| 5373 | /* Go find the opd reloc at the sym address. */ |
| 5374 | lo = relocs; |
| 5375 | hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */ |
| 5376 | val = (bfd_vma) -1; |
| 5377 | while (lo < hi) |
| 5378 | { |
| 5379 | look = lo + (hi - lo) / 2; |
| 5380 | if (look->r_offset < offset) |
| 5381 | lo = look + 1; |
| 5382 | else if (look->r_offset > offset) |
| 5383 | hi = look; |
| 5384 | else |
| 5385 | { |
| 5386 | Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd); |
| 5387 | |
| 5388 | if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64 |
| 5389 | && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC) |
| 5390 | { |
| 5391 | unsigned long symndx = ELF64_R_SYM (look->r_info); |
| 5392 | asection *sec = NULL; |
| 5393 | |
| 5394 | if (symndx >= symtab_hdr->sh_info |
| 5395 | && elf_sym_hashes (opd_bfd) != NULL) |
| 5396 | { |
| 5397 | struct elf_link_hash_entry **sym_hashes; |
| 5398 | struct elf_link_hash_entry *rh; |
| 5399 | |
| 5400 | sym_hashes = elf_sym_hashes (opd_bfd); |
| 5401 | rh = sym_hashes[symndx - symtab_hdr->sh_info]; |
| 5402 | if (rh != NULL) |
| 5403 | { |
| 5404 | rh = elf_follow_link (rh); |
| 5405 | if (rh->root.type != bfd_link_hash_defined |
| 5406 | && rh->root.type != bfd_link_hash_defweak) |
| 5407 | break; |
| 5408 | if (rh->root.u.def.section->owner == opd_bfd) |
| 5409 | { |
| 5410 | val = rh->root.u.def.value; |
| 5411 | sec = rh->root.u.def.section; |
| 5412 | } |
| 5413 | } |
| 5414 | } |
| 5415 | |
| 5416 | if (sec == NULL) |
| 5417 | { |
| 5418 | Elf_Internal_Sym *sym; |
| 5419 | |
| 5420 | if (symndx < symtab_hdr->sh_info) |
| 5421 | { |
| 5422 | sym = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 5423 | if (sym == NULL) |
| 5424 | { |
| 5425 | size_t symcnt = symtab_hdr->sh_info; |
| 5426 | sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr, |
| 5427 | symcnt, 0, |
| 5428 | NULL, NULL, NULL); |
| 5429 | if (sym == NULL) |
| 5430 | break; |
| 5431 | symtab_hdr->contents = (bfd_byte *) sym; |
| 5432 | } |
| 5433 | sym += symndx; |
| 5434 | } |
| 5435 | else |
| 5436 | { |
| 5437 | sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr, |
| 5438 | 1, symndx, |
| 5439 | NULL, NULL, NULL); |
| 5440 | if (sym == NULL) |
| 5441 | break; |
| 5442 | } |
| 5443 | sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx); |
| 5444 | if (sec == NULL) |
| 5445 | break; |
| 5446 | BFD_ASSERT ((sec->flags & SEC_MERGE) == 0); |
| 5447 | val = sym->st_value; |
| 5448 | } |
| 5449 | |
| 5450 | val += look->r_addend; |
| 5451 | if (code_off != NULL) |
| 5452 | *code_off = val; |
| 5453 | if (code_sec != NULL) |
| 5454 | { |
| 5455 | if (in_code_sec && *code_sec != sec) |
| 5456 | return -1; |
| 5457 | else |
| 5458 | *code_sec = sec; |
| 5459 | } |
| 5460 | if (sec->output_section != NULL) |
| 5461 | val += sec->output_section->vma + sec->output_offset; |
| 5462 | } |
| 5463 | break; |
| 5464 | } |
| 5465 | } |
| 5466 | |
| 5467 | return val; |
| 5468 | } |
| 5469 | |
| 5470 | /* If the ELF symbol SYM might be a function in SEC, return the |
| 5471 | function size and set *CODE_OFF to the function's entry point, |
| 5472 | otherwise return zero. */ |
| 5473 | |
| 5474 | static bfd_size_type |
| 5475 | ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec, |
| 5476 | bfd_vma *code_off) |
| 5477 | { |
| 5478 | bfd_size_type size; |
| 5479 | |
| 5480 | if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT |
| 5481 | | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0) |
| 5482 | return 0; |
| 5483 | |
| 5484 | size = 0; |
| 5485 | if (!(sym->flags & BSF_SYNTHETIC)) |
| 5486 | size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size; |
| 5487 | |
| 5488 | if (strcmp (sym->section->name, ".opd") == 0) |
| 5489 | { |
| 5490 | struct _opd_sec_data *opd = get_opd_info (sym->section); |
| 5491 | bfd_vma symval = sym->value; |
| 5492 | |
| 5493 | if (opd != NULL |
| 5494 | && opd->adjust != NULL |
| 5495 | && elf_section_data (sym->section)->relocs != NULL) |
| 5496 | { |
| 5497 | /* opd_entry_value will use cached relocs that have been |
| 5498 | adjusted, but with raw symbols. That means both local |
| 5499 | and global symbols need adjusting. */ |
| 5500 | long adjust = opd->adjust[OPD_NDX (symval)]; |
| 5501 | if (adjust == -1) |
| 5502 | return 0; |
| 5503 | symval += adjust; |
| 5504 | } |
| 5505 | |
| 5506 | if (opd_entry_value (sym->section, symval, |
| 5507 | &sec, code_off, TRUE) == (bfd_vma) -1) |
| 5508 | return 0; |
| 5509 | /* An old ABI binary with dot-syms has a size of 24 on the .opd |
| 5510 | symbol. This size has nothing to do with the code size of the |
| 5511 | function, which is what we're supposed to return, but the |
| 5512 | code size isn't available without looking up the dot-sym. |
| 5513 | However, doing that would be a waste of time particularly |
| 5514 | since elf_find_function will look at the dot-sym anyway. |
| 5515 | Now, elf_find_function will keep the largest size of any |
| 5516 | function sym found at the code address of interest, so return |
| 5517 | 1 here to avoid it incorrectly caching a larger function size |
| 5518 | for a small function. This does mean we return the wrong |
| 5519 | size for a new-ABI function of size 24, but all that does is |
| 5520 | disable caching for such functions. */ |
| 5521 | if (size == 24) |
| 5522 | size = 1; |
| 5523 | } |
| 5524 | else |
| 5525 | { |
| 5526 | if (sym->section != sec) |
| 5527 | return 0; |
| 5528 | *code_off = sym->value; |
| 5529 | } |
| 5530 | if (size == 0) |
| 5531 | size = 1; |
| 5532 | return size; |
| 5533 | } |
| 5534 | |
| 5535 | /* Return true if symbol is a strong function defined in an ELFv2 |
| 5536 | object with st_other localentry bits of zero, ie. its local entry |
| 5537 | point coincides with its global entry point. */ |
| 5538 | |
| 5539 | static bfd_boolean |
| 5540 | is_elfv2_localentry0 (struct elf_link_hash_entry *h) |
| 5541 | { |
| 5542 | return (h != NULL |
| 5543 | && h->type == STT_FUNC |
| 5544 | && h->root.type == bfd_link_hash_defined |
| 5545 | && (STO_PPC64_LOCAL_MASK & h->other) == 0 |
| 5546 | && !ppc_elf_hash_entry (h)->non_zero_localentry |
| 5547 | && is_ppc64_elf (h->root.u.def.section->owner) |
| 5548 | && abiversion (h->root.u.def.section->owner) >= 2); |
| 5549 | } |
| 5550 | |
| 5551 | /* Return true if symbol is defined in a regular object file. */ |
| 5552 | |
| 5553 | static bfd_boolean |
| 5554 | is_static_defined (struct elf_link_hash_entry *h) |
| 5555 | { |
| 5556 | return ((h->root.type == bfd_link_hash_defined |
| 5557 | || h->root.type == bfd_link_hash_defweak) |
| 5558 | && h->root.u.def.section != NULL |
| 5559 | && h->root.u.def.section->output_section != NULL); |
| 5560 | } |
| 5561 | |
| 5562 | /* If FDH is a function descriptor symbol, return the associated code |
| 5563 | entry symbol if it is defined. Return NULL otherwise. */ |
| 5564 | |
| 5565 | static struct ppc_link_hash_entry * |
| 5566 | defined_code_entry (struct ppc_link_hash_entry *fdh) |
| 5567 | { |
| 5568 | if (fdh->is_func_descriptor) |
| 5569 | { |
| 5570 | struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh); |
| 5571 | if (fh->elf.root.type == bfd_link_hash_defined |
| 5572 | || fh->elf.root.type == bfd_link_hash_defweak) |
| 5573 | return fh; |
| 5574 | } |
| 5575 | return NULL; |
| 5576 | } |
| 5577 | |
| 5578 | /* If FH is a function code entry symbol, return the associated |
| 5579 | function descriptor symbol if it is defined. Return NULL otherwise. */ |
| 5580 | |
| 5581 | static struct ppc_link_hash_entry * |
| 5582 | defined_func_desc (struct ppc_link_hash_entry *fh) |
| 5583 | { |
| 5584 | if (fh->oh != NULL |
| 5585 | && fh->oh->is_func_descriptor) |
| 5586 | { |
| 5587 | struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh); |
| 5588 | if (fdh->elf.root.type == bfd_link_hash_defined |
| 5589 | || fdh->elf.root.type == bfd_link_hash_defweak) |
| 5590 | return fdh; |
| 5591 | } |
| 5592 | return NULL; |
| 5593 | } |
| 5594 | |
| 5595 | /* Given H is a symbol that satisfies is_static_defined, return the |
| 5596 | value in the output file. */ |
| 5597 | |
| 5598 | static bfd_vma |
| 5599 | defined_sym_val (struct elf_link_hash_entry *h) |
| 5600 | { |
| 5601 | return (h->root.u.def.section->output_section->vma |
| 5602 | + h->root.u.def.section->output_offset |
| 5603 | + h->root.u.def.value); |
| 5604 | } |
| 5605 | |
| 5606 | /* Return true if H matches __tls_get_addr or one of its variants. */ |
| 5607 | |
| 5608 | static bfd_boolean |
| 5609 | is_tls_get_addr (struct elf_link_hash_entry *h, |
| 5610 | struct ppc_link_hash_table *htab) |
| 5611 | { |
| 5612 | return (h == &htab->tls_get_addr_fd->elf || h == &htab->tga_desc_fd->elf |
| 5613 | || h == &htab->tls_get_addr->elf || h == &htab->tga_desc->elf); |
| 5614 | } |
| 5615 | |
| 5616 | static bfd_boolean func_desc_adjust (struct elf_link_hash_entry *, void *); |
| 5617 | |
| 5618 | /* Garbage collect sections, after first dealing with dot-symbols. */ |
| 5619 | |
| 5620 | static bfd_boolean |
| 5621 | ppc64_elf_gc_sections (bfd *abfd, struct bfd_link_info *info) |
| 5622 | { |
| 5623 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
| 5624 | |
| 5625 | if (htab != NULL && htab->need_func_desc_adj) |
| 5626 | { |
| 5627 | elf_link_hash_traverse (&htab->elf, func_desc_adjust, info); |
| 5628 | htab->need_func_desc_adj = 0; |
| 5629 | } |
| 5630 | return bfd_elf_gc_sections (abfd, info); |
| 5631 | } |
| 5632 | |
| 5633 | /* Mark all our entry sym sections, both opd and code section. */ |
| 5634 | |
| 5635 | static void |
| 5636 | ppc64_elf_gc_keep (struct bfd_link_info *info) |
| 5637 | { |
| 5638 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
| 5639 | struct bfd_sym_chain *sym; |
| 5640 | |
| 5641 | if (htab == NULL) |
| 5642 | return; |
| 5643 | |
| 5644 | for (sym = info->gc_sym_list; sym != NULL; sym = sym->next) |
| 5645 | { |
| 5646 | struct ppc_link_hash_entry *eh, *fh; |
| 5647 | asection *sec; |
| 5648 | |
| 5649 | eh = ppc_elf_hash_entry (elf_link_hash_lookup (&htab->elf, sym->name, |
| 5650 | FALSE, FALSE, TRUE)); |
| 5651 | if (eh == NULL) |
| 5652 | continue; |
| 5653 | if (eh->elf.root.type != bfd_link_hash_defined |
| 5654 | && eh->elf.root.type != bfd_link_hash_defweak) |
| 5655 | continue; |
| 5656 | |
| 5657 | fh = defined_code_entry (eh); |
| 5658 | if (fh != NULL) |
| 5659 | { |
| 5660 | sec = fh->elf.root.u.def.section; |
| 5661 | sec->flags |= SEC_KEEP; |
| 5662 | } |
| 5663 | else if (get_opd_info (eh->elf.root.u.def.section) != NULL |
| 5664 | && opd_entry_value (eh->elf.root.u.def.section, |
| 5665 | eh->elf.root.u.def.value, |
| 5666 | &sec, NULL, FALSE) != (bfd_vma) -1) |
| 5667 | sec->flags |= SEC_KEEP; |
| 5668 | |
| 5669 | sec = eh->elf.root.u.def.section; |
| 5670 | sec->flags |= SEC_KEEP; |
| 5671 | } |
| 5672 | } |
| 5673 | |
| 5674 | /* Mark sections containing dynamically referenced symbols. When |
| 5675 | building shared libraries, we must assume that any visible symbol is |
| 5676 | referenced. */ |
| 5677 | |
| 5678 | static bfd_boolean |
| 5679 | ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf) |
| 5680 | { |
| 5681 | struct bfd_link_info *info = (struct bfd_link_info *) inf; |
| 5682 | struct ppc_link_hash_entry *eh = ppc_elf_hash_entry (h); |
| 5683 | struct ppc_link_hash_entry *fdh; |
| 5684 | struct bfd_elf_dynamic_list *d = info->dynamic_list; |
| 5685 | |
| 5686 | /* Dynamic linking info is on the func descriptor sym. */ |
| 5687 | fdh = defined_func_desc (eh); |
| 5688 | if (fdh != NULL) |
| 5689 | eh = fdh; |
| 5690 | |
| 5691 | if ((eh->elf.root.type == bfd_link_hash_defined |
| 5692 | || eh->elf.root.type == bfd_link_hash_defweak) |
| 5693 | && ((eh->elf.ref_dynamic && !eh->elf.forced_local) |
| 5694 | || ((eh->elf.def_regular || ELF_COMMON_DEF_P (&eh->elf)) |
| 5695 | && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL |
| 5696 | && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN |
| 5697 | && (!bfd_link_executable (info) |
| 5698 | || info->gc_keep_exported |
| 5699 | || info->export_dynamic |
| 5700 | || (eh->elf.dynamic |
| 5701 | && d != NULL |
| 5702 | && (*d->match) (&d->head, NULL, |
| 5703 | eh->elf.root.root.string))) |
| 5704 | && (eh->elf.versioned >= versioned |
| 5705 | || !bfd_hide_sym_by_version (info->version_info, |
| 5706 | eh->elf.root.root.string))))) |
| 5707 | { |
| 5708 | asection *code_sec; |
| 5709 | struct ppc_link_hash_entry *fh; |
| 5710 | |
| 5711 | eh->elf.root.u.def.section->flags |= SEC_KEEP; |
| 5712 | |
| 5713 | /* Function descriptor syms cause the associated |
| 5714 | function code sym section to be marked. */ |
| 5715 | fh = defined_code_entry (eh); |
| 5716 | if (fh != NULL) |
| 5717 | { |
| 5718 | code_sec = fh->elf.root.u.def.section; |
| 5719 | code_sec->flags |= SEC_KEEP; |
| 5720 | } |
| 5721 | else if (get_opd_info (eh->elf.root.u.def.section) != NULL |
| 5722 | && opd_entry_value (eh->elf.root.u.def.section, |
| 5723 | eh->elf.root.u.def.value, |
| 5724 | &code_sec, NULL, FALSE) != (bfd_vma) -1) |
| 5725 | code_sec->flags |= SEC_KEEP; |
| 5726 | } |
| 5727 | |
| 5728 | return TRUE; |
| 5729 | } |
| 5730 | |
| 5731 | /* Return the section that should be marked against GC for a given |
| 5732 | relocation. */ |
| 5733 | |
| 5734 | static asection * |
| 5735 | ppc64_elf_gc_mark_hook (asection *sec, |
| 5736 | struct bfd_link_info *info, |
| 5737 | Elf_Internal_Rela *rel, |
| 5738 | struct elf_link_hash_entry *h, |
| 5739 | Elf_Internal_Sym *sym) |
| 5740 | { |
| 5741 | asection *rsec; |
| 5742 | |
| 5743 | /* Syms return NULL if we're marking .opd, so we avoid marking all |
| 5744 | function sections, as all functions are referenced in .opd. */ |
| 5745 | rsec = NULL; |
| 5746 | if (get_opd_info (sec) != NULL) |
| 5747 | return rsec; |
| 5748 | |
| 5749 | if (h != NULL) |
| 5750 | { |
| 5751 | enum elf_ppc64_reloc_type r_type; |
| 5752 | struct ppc_link_hash_entry *eh, *fh, *fdh; |
| 5753 | |
| 5754 | r_type = ELF64_R_TYPE (rel->r_info); |
| 5755 | switch (r_type) |
| 5756 | { |
| 5757 | case R_PPC64_GNU_VTINHERIT: |
| 5758 | case R_PPC64_GNU_VTENTRY: |
| 5759 | break; |
| 5760 | |
| 5761 | default: |
| 5762 | switch (h->root.type) |
| 5763 | { |
| 5764 | case bfd_link_hash_defined: |
| 5765 | case bfd_link_hash_defweak: |
| 5766 | eh = ppc_elf_hash_entry (h); |
| 5767 | fdh = defined_func_desc (eh); |
| 5768 | if (fdh != NULL) |
| 5769 | { |
| 5770 | /* -mcall-aixdesc code references the dot-symbol on |
| 5771 | a call reloc. Mark the function descriptor too |
| 5772 | against garbage collection. */ |
| 5773 | fdh->elf.mark = 1; |
| 5774 | if (fdh->elf.is_weakalias) |
| 5775 | weakdef (&fdh->elf)->mark = 1; |
| 5776 | eh = fdh; |
| 5777 | } |
| 5778 | |
| 5779 | /* Function descriptor syms cause the associated |
| 5780 | function code sym section to be marked. */ |
| 5781 | fh = defined_code_entry (eh); |
| 5782 | if (fh != NULL) |
| 5783 | { |
| 5784 | /* They also mark their opd section. */ |
| 5785 | eh->elf.root.u.def.section->gc_mark = 1; |
| 5786 | |
| 5787 | rsec = fh->elf.root.u.def.section; |
| 5788 | } |
| 5789 | else if (get_opd_info (eh->elf.root.u.def.section) != NULL |
| 5790 | && opd_entry_value (eh->elf.root.u.def.section, |
| 5791 | eh->elf.root.u.def.value, |
| 5792 | &rsec, NULL, FALSE) != (bfd_vma) -1) |
| 5793 | eh->elf.root.u.def.section->gc_mark = 1; |
| 5794 | else |
| 5795 | rsec = h->root.u.def.section; |
| 5796 | break; |
| 5797 | |
| 5798 | case bfd_link_hash_common: |
| 5799 | rsec = h->root.u.c.p->section; |
| 5800 | break; |
| 5801 | |
| 5802 | default: |
| 5803 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); |
| 5804 | } |
| 5805 | } |
| 5806 | } |
| 5807 | else |
| 5808 | { |
| 5809 | struct _opd_sec_data *opd; |
| 5810 | |
| 5811 | rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx); |
| 5812 | opd = get_opd_info (rsec); |
| 5813 | if (opd != NULL && opd->func_sec != NULL) |
| 5814 | { |
| 5815 | rsec->gc_mark = 1; |
| 5816 | |
| 5817 | rsec = opd->func_sec[OPD_NDX (sym->st_value + rel->r_addend)]; |
| 5818 | } |
| 5819 | } |
| 5820 | |
| 5821 | return rsec; |
| 5822 | } |
| 5823 | |
| 5824 | /* The maximum size of .sfpr. */ |
| 5825 | #define SFPR_MAX (218*4) |
| 5826 | |
| 5827 | struct sfpr_def_parms |
| 5828 | { |
| 5829 | const char name[12]; |
| 5830 | unsigned char lo, hi; |
| 5831 | bfd_byte *(*write_ent) (bfd *, bfd_byte *, int); |
| 5832 | bfd_byte *(*write_tail) (bfd *, bfd_byte *, int); |
| 5833 | }; |
| 5834 | |
| 5835 | /* Auto-generate _save*, _rest* functions in .sfpr. |
| 5836 | If STUB_SEC is non-null, define alias symbols in STUB_SEC |
| 5837 | instead. */ |
| 5838 | |
| 5839 | static bfd_boolean |
| 5840 | sfpr_define (struct bfd_link_info *info, |
| 5841 | const struct sfpr_def_parms *parm, |
| 5842 | asection *stub_sec) |
| 5843 | { |
| 5844 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
| 5845 | unsigned int i; |
| 5846 | size_t len = strlen (parm->name); |
| 5847 | bfd_boolean writing = FALSE; |
| 5848 | char sym[16]; |
| 5849 | |
| 5850 | if (htab == NULL) |
| 5851 | return FALSE; |
| 5852 | |
| 5853 | memcpy (sym, parm->name, len); |
| 5854 | sym[len + 2] = 0; |
| 5855 | |
| 5856 | for (i = parm->lo; i <= parm->hi; i++) |
| 5857 | { |
| 5858 | struct ppc_link_hash_entry *h; |
| 5859 | |
| 5860 | sym[len + 0] = i / 10 + '0'; |
| 5861 | sym[len + 1] = i % 10 + '0'; |
| 5862 | h = ppc_elf_hash_entry (elf_link_hash_lookup (&htab->elf, sym, |
| 5863 | writing, TRUE, TRUE)); |
| 5864 | if (stub_sec != NULL) |
| 5865 | { |
| 5866 | if (h != NULL |
| 5867 | && h->elf.root.type == bfd_link_hash_defined |
| 5868 | && h->elf.root.u.def.section == htab->sfpr) |
| 5869 | { |
| 5870 | struct elf_link_hash_entry *s; |
| 5871 | char buf[32]; |
| 5872 | sprintf (buf, "%08x.%s", stub_sec->id & 0xffffffff, sym); |
| 5873 | s = elf_link_hash_lookup (&htab->elf, buf, TRUE, TRUE, FALSE); |
| 5874 | if (s == NULL) |
| 5875 | return FALSE; |
| 5876 | if (s->root.type == bfd_link_hash_new) |
| 5877 | { |
| 5878 | s->root.type = bfd_link_hash_defined; |
| 5879 | s->root.u.def.section = stub_sec; |
| 5880 | s->root.u.def.value = (stub_sec->size - htab->sfpr->size |
| 5881 | + h->elf.root.u.def.value); |
| 5882 | s->ref_regular = 1; |
| 5883 | s->def_regular = 1; |
| 5884 | s->ref_regular_nonweak = 1; |
| 5885 | s->forced_local = 1; |
| 5886 | s->non_elf = 0; |
| 5887 | s->root.linker_def = 1; |
| 5888 | } |
| 5889 | } |
| 5890 | continue; |
| 5891 | } |
| 5892 | if (h != NULL) |
| 5893 | { |
| 5894 | h->save_res = 1; |
| 5895 | if (!h->elf.def_regular) |
| 5896 | { |
| 5897 | h->elf.root.type = bfd_link_hash_defined; |
| 5898 | h->elf.root.u.def.section = htab->sfpr; |
| 5899 | h->elf.root.u.def.value = htab->sfpr->size; |
| 5900 | h->elf.type = STT_FUNC; |
| 5901 | h->elf.def_regular = 1; |
| 5902 | h->elf.non_elf = 0; |
| 5903 | _bfd_elf_link_hash_hide_symbol (info, &h->elf, TRUE); |
| 5904 | writing = TRUE; |
| 5905 | if (htab->sfpr->contents == NULL) |
| 5906 | { |
| 5907 | htab->sfpr->contents |
| 5908 | = bfd_alloc (htab->elf.dynobj, SFPR_MAX); |
| 5909 | if (htab->sfpr->contents == NULL) |
| 5910 | return FALSE; |
| 5911 | } |
| 5912 | } |
| 5913 | } |
| 5914 | if (writing) |
| 5915 | { |
| 5916 | bfd_byte *p = htab->sfpr->contents + htab->sfpr->size; |
| 5917 | if (i != parm->hi) |
| 5918 | p = (*parm->write_ent) (htab->elf.dynobj, p, i); |
| 5919 | else |
| 5920 | p = (*parm->write_tail) (htab->elf.dynobj, p, i); |
| 5921 | htab->sfpr->size = p - htab->sfpr->contents; |
| 5922 | } |
| 5923 | } |
| 5924 | |
| 5925 | return TRUE; |
| 5926 | } |
| 5927 | |
| 5928 | static bfd_byte * |
| 5929 | savegpr0 (bfd *abfd, bfd_byte *p, int r) |
| 5930 | { |
| 5931 | bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p); |
| 5932 | return p + 4; |
| 5933 | } |
| 5934 | |
| 5935 | static bfd_byte * |
| 5936 | savegpr0_tail (bfd *abfd, bfd_byte *p, int r) |
| 5937 | { |
| 5938 | p = savegpr0 (abfd, p, r); |
| 5939 | bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p); |
| 5940 | p = p + 4; |
| 5941 | bfd_put_32 (abfd, BLR, p); |
| 5942 | return p + 4; |
| 5943 | } |
| 5944 | |
| 5945 | static bfd_byte * |
| 5946 | restgpr0 (bfd *abfd, bfd_byte *p, int r) |
| 5947 | { |
| 5948 | bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p); |
| 5949 | return p + 4; |
| 5950 | } |
| 5951 | |
| 5952 | static bfd_byte * |
| 5953 | restgpr0_tail (bfd *abfd, bfd_byte *p, int r) |
| 5954 | { |
| 5955 | bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p); |
| 5956 | p = p + 4; |
| 5957 | p = restgpr0 (abfd, p, r); |
| 5958 | bfd_put_32 (abfd, MTLR_R0, p); |
| 5959 | p = p + 4; |
| 5960 | if (r == 29) |
| 5961 | { |
| 5962 | p = restgpr0 (abfd, p, 30); |
| 5963 | p = restgpr0 (abfd, p, 31); |
| 5964 | } |
| 5965 | bfd_put_32 (abfd, BLR, p); |
| 5966 | return p + 4; |
| 5967 | } |
| 5968 | |
| 5969 | static bfd_byte * |
| 5970 | savegpr1 (bfd *abfd, bfd_byte *p, int r) |
| 5971 | { |
| 5972 | bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p); |
| 5973 | return p + 4; |
| 5974 | } |
| 5975 | |
| 5976 | static bfd_byte * |
| 5977 | savegpr1_tail (bfd *abfd, bfd_byte *p, int r) |
| 5978 | { |
| 5979 | p = savegpr1 (abfd, p, r); |
| 5980 | bfd_put_32 (abfd, BLR, p); |
| 5981 | return p + 4; |
| 5982 | } |
| 5983 | |
| 5984 | static bfd_byte * |
| 5985 | restgpr1 (bfd *abfd, bfd_byte *p, int r) |
| 5986 | { |
| 5987 | bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p); |
| 5988 | return p + 4; |
| 5989 | } |
| 5990 | |
| 5991 | static bfd_byte * |
| 5992 | restgpr1_tail (bfd *abfd, bfd_byte *p, int r) |
| 5993 | { |
| 5994 | p = restgpr1 (abfd, p, r); |
| 5995 | bfd_put_32 (abfd, BLR, p); |
| 5996 | return p + 4; |
| 5997 | } |
| 5998 | |
| 5999 | static bfd_byte * |
| 6000 | savefpr (bfd *abfd, bfd_byte *p, int r) |
| 6001 | { |
| 6002 | bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p); |
| 6003 | return p + 4; |
| 6004 | } |
| 6005 | |
| 6006 | static bfd_byte * |
| 6007 | savefpr0_tail (bfd *abfd, bfd_byte *p, int r) |
| 6008 | { |
| 6009 | p = savefpr (abfd, p, r); |
| 6010 | bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p); |
| 6011 | p = p + 4; |
| 6012 | bfd_put_32 (abfd, BLR, p); |
| 6013 | return p + 4; |
| 6014 | } |
| 6015 | |
| 6016 | static bfd_byte * |
| 6017 | restfpr (bfd *abfd, bfd_byte *p, int r) |
| 6018 | { |
| 6019 | bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p); |
| 6020 | return p + 4; |
| 6021 | } |
| 6022 | |
| 6023 | static bfd_byte * |
| 6024 | restfpr0_tail (bfd *abfd, bfd_byte *p, int r) |
| 6025 | { |
| 6026 | bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p); |
| 6027 | p = p + 4; |
| 6028 | p = restfpr (abfd, p, r); |
| 6029 | bfd_put_32 (abfd, MTLR_R0, p); |
| 6030 | p = p + 4; |
| 6031 | if (r == 29) |
| 6032 | { |
| 6033 | p = restfpr (abfd, p, 30); |
| 6034 | p = restfpr (abfd, p, 31); |
| 6035 | } |
| 6036 | bfd_put_32 (abfd, BLR, p); |
| 6037 | return p + 4; |
| 6038 | } |
| 6039 | |
| 6040 | static bfd_byte * |
| 6041 | savefpr1_tail (bfd *abfd, bfd_byte *p, int r) |
| 6042 | { |
| 6043 | p = savefpr (abfd, p, r); |
| 6044 | bfd_put_32 (abfd, BLR, p); |
| 6045 | return p + 4; |
| 6046 | } |
| 6047 | |
| 6048 | static bfd_byte * |
| 6049 | restfpr1_tail (bfd *abfd, bfd_byte *p, int r) |
| 6050 | { |
| 6051 | p = restfpr (abfd, p, r); |
| 6052 | bfd_put_32 (abfd, BLR, p); |
| 6053 | return p + 4; |
| 6054 | } |
| 6055 | |
| 6056 | static bfd_byte * |
| 6057 | savevr (bfd *abfd, bfd_byte *p, int r) |
| 6058 | { |
| 6059 | bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p); |
| 6060 | p = p + 4; |
| 6061 | bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p); |
| 6062 | return p + 4; |
| 6063 | } |
| 6064 | |
| 6065 | static bfd_byte * |
| 6066 | savevr_tail (bfd *abfd, bfd_byte *p, int r) |
| 6067 | { |
| 6068 | p = savevr (abfd, p, r); |
| 6069 | bfd_put_32 (abfd, BLR, p); |
| 6070 | return p + 4; |
| 6071 | } |
| 6072 | |
| 6073 | static bfd_byte * |
| 6074 | restvr (bfd *abfd, bfd_byte *p, int r) |
| 6075 | { |
| 6076 | bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p); |
| 6077 | p = p + 4; |
| 6078 | bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p); |
| 6079 | return p + 4; |
| 6080 | } |
| 6081 | |
| 6082 | static bfd_byte * |
| 6083 | restvr_tail (bfd *abfd, bfd_byte *p, int r) |
| 6084 | { |
| 6085 | p = restvr (abfd, p, r); |
| 6086 | bfd_put_32 (abfd, BLR, p); |
| 6087 | return p + 4; |
| 6088 | } |
| 6089 | |
| 6090 | #define STDU_R1_0R1 0xf8210001 |
| 6091 | #define ADDI_R1_R1 0x38210000 |
| 6092 | |
| 6093 | /* Emit prologue of wrapper preserving regs around a call to |
| 6094 | __tls_get_addr_opt. */ |
| 6095 | |
| 6096 | static bfd_byte * |
| 6097 | tls_get_addr_prologue (bfd *obfd, bfd_byte *p, struct ppc_link_hash_table *htab) |
| 6098 | { |
| 6099 | unsigned int i; |
| 6100 | |
| 6101 | bfd_put_32 (obfd, MFLR_R0, p); |
| 6102 | p += 4; |
| 6103 | bfd_put_32 (obfd, STD_R0_0R1 + 16, p); |
| 6104 | p += 4; |
| 6105 | |
| 6106 | if (htab->opd_abi) |
| 6107 | { |
| 6108 | for (i = 4; i < 12; i++) |
| 6109 | { |
| 6110 | bfd_put_32 (obfd, |
| 6111 | STD_R0_0R1 | i << 21 | (-(13 - i) * 8 & 0xffff), p); |
| 6112 | p += 4; |
| 6113 | } |
| 6114 | bfd_put_32 (obfd, STDU_R1_0R1 | (-128 & 0xffff), p); |
| 6115 | p += 4; |
| 6116 | } |
| 6117 | else |
| 6118 | { |
| 6119 | for (i = 4; i < 12; i++) |
| 6120 | { |
| 6121 | bfd_put_32 (obfd, |
| 6122 | STD_R0_0R1 | i << 21 | (-(12 - i) * 8 & 0xffff), p); |
| 6123 | p += 4; |
| 6124 | } |
| 6125 | bfd_put_32 (obfd, STDU_R1_0R1 | (-96 & 0xffff), p); |
| 6126 | p += 4; |
| 6127 | } |
| 6128 | return p; |
| 6129 | } |
| 6130 | |
| 6131 | /* Emit epilogue of wrapper preserving regs around a call to |
| 6132 | __tls_get_addr_opt. */ |
| 6133 | |
| 6134 | static bfd_byte * |
| 6135 | tls_get_addr_epilogue (bfd *obfd, bfd_byte *p, struct ppc_link_hash_table *htab) |
| 6136 | { |
| 6137 | unsigned int i; |
| 6138 | |
| 6139 | if (htab->opd_abi) |
| 6140 | { |
| 6141 | for (i = 4; i < 12; i++) |
| 6142 | { |
| 6143 | bfd_put_32 (obfd, LD_R0_0R1 | i << 21 | (128 - (13 - i) * 8), p); |
| 6144 | p += 4; |
| 6145 | } |
| 6146 | bfd_put_32 (obfd, ADDI_R1_R1 | 128, p); |
| 6147 | p += 4; |
| 6148 | } |
| 6149 | else |
| 6150 | { |
| 6151 | for (i = 4; i < 12; i++) |
| 6152 | { |
| 6153 | bfd_put_32 (obfd, LD_R0_0R1 | i << 21 | (96 - (12 - i) * 8), p); |
| 6154 | p += 4; |
| 6155 | } |
| 6156 | bfd_put_32 (obfd, ADDI_R1_R1 | 96, p); |
| 6157 | p += 4; |
| 6158 | } |
| 6159 | bfd_put_32 (obfd, LD_R0_0R1 | 16, p); |
| 6160 | p += 4; |
| 6161 | bfd_put_32 (obfd, MTLR_R0, p); |
| 6162 | p += 4; |
| 6163 | bfd_put_32 (obfd, BLR, p); |
| 6164 | p += 4; |
| 6165 | return p; |
| 6166 | } |
| 6167 | |
| 6168 | /* Called via elf_link_hash_traverse to transfer dynamic linking |
| 6169 | information on function code symbol entries to their corresponding |
| 6170 | function descriptor symbol entries. */ |
| 6171 | |
| 6172 | static bfd_boolean |
| 6173 | func_desc_adjust (struct elf_link_hash_entry *h, void *inf) |
| 6174 | { |
| 6175 | struct bfd_link_info *info; |
| 6176 | struct ppc_link_hash_table *htab; |
| 6177 | struct ppc_link_hash_entry *fh; |
| 6178 | struct ppc_link_hash_entry *fdh; |
| 6179 | bfd_boolean force_local; |
| 6180 | |
| 6181 | fh = ppc_elf_hash_entry (h); |
| 6182 | if (fh->elf.root.type == bfd_link_hash_indirect) |
| 6183 | return TRUE; |
| 6184 | |
| 6185 | if (!fh->is_func) |
| 6186 | return TRUE; |
| 6187 | |
| 6188 | if (fh->elf.root.root.string[0] != '.' |
| 6189 | || fh->elf.root.root.string[1] == '\0') |
| 6190 | return TRUE; |
| 6191 | |
| 6192 | info = inf; |
| 6193 | htab = ppc_hash_table (info); |
| 6194 | if (htab == NULL) |
| 6195 | return FALSE; |
| 6196 | |
| 6197 | /* Find the corresponding function descriptor symbol. */ |
| 6198 | fdh = lookup_fdh (fh, htab); |
| 6199 | |
| 6200 | /* Resolve undefined references to dot-symbols as the value |
| 6201 | in the function descriptor, if we have one in a regular object. |
| 6202 | This is to satisfy cases like ".quad .foo". Calls to functions |
| 6203 | in dynamic objects are handled elsewhere. */ |
| 6204 | if ((fh->elf.root.type == bfd_link_hash_undefined |
| 6205 | || fh->elf.root.type == bfd_link_hash_undefweak) |
| 6206 | && (fdh->elf.root.type == bfd_link_hash_defined |
| 6207 | || fdh->elf.root.type == bfd_link_hash_defweak) |
| 6208 | && get_opd_info (fdh->elf.root.u.def.section) != NULL |
| 6209 | && opd_entry_value (fdh->elf.root.u.def.section, |
| 6210 | fdh->elf.root.u.def.value, |
| 6211 | &fh->elf.root.u.def.section, |
| 6212 | &fh->elf.root.u.def.value, FALSE) != (bfd_vma) -1) |
| 6213 | { |
| 6214 | fh->elf.root.type = fdh->elf.root.type; |
| 6215 | fh->elf.forced_local = 1; |
| 6216 | fh->elf.def_regular = fdh->elf.def_regular; |
| 6217 | fh->elf.def_dynamic = fdh->elf.def_dynamic; |
| 6218 | } |
| 6219 | |
| 6220 | if (!fh->elf.dynamic) |
| 6221 | { |
| 6222 | struct plt_entry *ent; |
| 6223 | |
| 6224 | for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next) |
| 6225 | if (ent->plt.refcount > 0) |
| 6226 | break; |
| 6227 | if (ent == NULL) |
| 6228 | return TRUE; |
| 6229 | } |
| 6230 | |
| 6231 | /* Create a descriptor as undefined if necessary. */ |
| 6232 | if (fdh == NULL |
| 6233 | && !bfd_link_executable (info) |
| 6234 | && (fh->elf.root.type == bfd_link_hash_undefined |
| 6235 | || fh->elf.root.type == bfd_link_hash_undefweak)) |
| 6236 | { |
| 6237 | fdh = make_fdh (info, fh); |
| 6238 | if (fdh == NULL) |
| 6239 | return FALSE; |
| 6240 | } |
| 6241 | |
| 6242 | /* We can't support overriding of symbols on a fake descriptor. */ |
| 6243 | if (fdh != NULL |
| 6244 | && fdh->fake |
| 6245 | && (fh->elf.root.type == bfd_link_hash_defined |
| 6246 | || fh->elf.root.type == bfd_link_hash_defweak)) |
| 6247 | _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, TRUE); |
| 6248 | |
| 6249 | /* Transfer dynamic linking information to the function descriptor. */ |
| 6250 | if (fdh != NULL) |
| 6251 | { |
| 6252 | fdh->elf.ref_regular |= fh->elf.ref_regular; |
| 6253 | fdh->elf.ref_dynamic |= fh->elf.ref_dynamic; |
| 6254 | fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak; |
| 6255 | fdh->elf.non_got_ref |= fh->elf.non_got_ref; |
| 6256 | fdh->elf.dynamic |= fh->elf.dynamic; |
| 6257 | fdh->elf.needs_plt |= (fh->elf.needs_plt |
| 6258 | || fh->elf.type == STT_FUNC |
| 6259 | || fh->elf.type == STT_GNU_IFUNC); |
| 6260 | move_plt_plist (fh, fdh); |
| 6261 | |
| 6262 | if (!fdh->elf.forced_local |
| 6263 | && fh->elf.dynindx != -1) |
| 6264 | if (!bfd_elf_link_record_dynamic_symbol (info, &fdh->elf)) |
| 6265 | return FALSE; |
| 6266 | } |
| 6267 | |
| 6268 | /* Now that the info is on the function descriptor, clear the |
| 6269 | function code sym info. Any function code syms for which we |
| 6270 | don't have a definition in a regular file, we force local. |
| 6271 | This prevents a shared library from exporting syms that have |
| 6272 | been imported from another library. Function code syms that |
| 6273 | are really in the library we must leave global to prevent the |
| 6274 | linker dragging in a definition from a static library. */ |
| 6275 | force_local = (!fh->elf.def_regular |
| 6276 | || fdh == NULL |
| 6277 | || !fdh->elf.def_regular |
| 6278 | || fdh->elf.forced_local); |
| 6279 | _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local); |
| 6280 | |
| 6281 | return TRUE; |
| 6282 | } |
| 6283 | |
| 6284 | static const struct sfpr_def_parms save_res_funcs[] = |
| 6285 | { |
| 6286 | { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail }, |
| 6287 | { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail }, |
| 6288 | { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail }, |
| 6289 | { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail }, |
| 6290 | { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail }, |
| 6291 | { "_savefpr_", 14, 31, savefpr, savefpr0_tail }, |
| 6292 | { "_restfpr_", 14, 29, restfpr, restfpr0_tail }, |
| 6293 | { "_restfpr_", 30, 31, restfpr, restfpr0_tail }, |
| 6294 | { "._savef", 14, 31, savefpr, savefpr1_tail }, |
| 6295 | { "._restf", 14, 31, restfpr, restfpr1_tail }, |
| 6296 | { "_savevr_", 20, 31, savevr, savevr_tail }, |
| 6297 | { "_restvr_", 20, 31, restvr, restvr_tail } |
| 6298 | }; |
| 6299 | |
| 6300 | /* Called near the start of bfd_elf_size_dynamic_sections. We use |
| 6301 | this hook to a) provide some gcc support functions, and b) transfer |
| 6302 | dynamic linking information gathered so far on function code symbol |
| 6303 | entries, to their corresponding function descriptor symbol entries. */ |
| 6304 | |
| 6305 | static bfd_boolean |
| 6306 | ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED, |
| 6307 | struct bfd_link_info *info) |
| 6308 | { |
| 6309 | struct ppc_link_hash_table *htab; |
| 6310 | |
| 6311 | htab = ppc_hash_table (info); |
| 6312 | if (htab == NULL) |
| 6313 | return FALSE; |
| 6314 | |
| 6315 | /* Provide any missing _save* and _rest* functions. */ |
| 6316 | if (htab->sfpr != NULL) |
| 6317 | { |
| 6318 | unsigned int i; |
| 6319 | |
| 6320 | htab->sfpr->size = 0; |
| 6321 | for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++) |
| 6322 | if (!sfpr_define (info, &save_res_funcs[i], NULL)) |
| 6323 | return FALSE; |
| 6324 | if (htab->sfpr->size == 0) |
| 6325 | htab->sfpr->flags |= SEC_EXCLUDE; |
| 6326 | } |
| 6327 | |
| 6328 | if (bfd_link_relocatable (info)) |
| 6329 | return TRUE; |
| 6330 | |
| 6331 | if (htab->elf.hgot != NULL) |
| 6332 | { |
| 6333 | _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, TRUE); |
| 6334 | /* Make .TOC. defined so as to prevent it being made dynamic. |
| 6335 | The wrong value here is fixed later in ppc64_elf_set_toc. */ |
| 6336 | if (!htab->elf.hgot->def_regular |
| 6337 | || htab->elf.hgot->root.type != bfd_link_hash_defined) |
| 6338 | { |
| 6339 | htab->elf.hgot->root.type = bfd_link_hash_defined; |
| 6340 | htab->elf.hgot->root.u.def.value = 0; |
| 6341 | htab->elf.hgot->root.u.def.section = bfd_abs_section_ptr; |
| 6342 | htab->elf.hgot->def_regular = 1; |
| 6343 | htab->elf.hgot->root.linker_def = 1; |
| 6344 | } |
| 6345 | htab->elf.hgot->type = STT_OBJECT; |
| 6346 | htab->elf.hgot->other |
| 6347 | = (htab->elf.hgot->other & ~ELF_ST_VISIBILITY (-1)) | STV_HIDDEN; |
| 6348 | } |
| 6349 | |
| 6350 | if (htab->need_func_desc_adj) |
| 6351 | { |
| 6352 | elf_link_hash_traverse (&htab->elf, func_desc_adjust, info); |
| 6353 | htab->need_func_desc_adj = 0; |
| 6354 | } |
| 6355 | |
| 6356 | return TRUE; |
| 6357 | } |
| 6358 | |
| 6359 | /* Return true if we have dynamic relocs against H or any of its weak |
| 6360 | aliases, that apply to read-only sections. Cannot be used after |
| 6361 | size_dynamic_sections. */ |
| 6362 | |
| 6363 | static bfd_boolean |
| 6364 | alias_readonly_dynrelocs (struct elf_link_hash_entry *h) |
| 6365 | { |
| 6366 | struct ppc_link_hash_entry *eh = ppc_elf_hash_entry (h); |
| 6367 | do |
| 6368 | { |
| 6369 | if (_bfd_elf_readonly_dynrelocs (&eh->elf)) |
| 6370 | return TRUE; |
| 6371 | eh = ppc_elf_hash_entry (eh->elf.u.alias); |
| 6372 | } |
| 6373 | while (eh != NULL && &eh->elf != h); |
| 6374 | |
| 6375 | return FALSE; |
| 6376 | } |
| 6377 | |
| 6378 | /* Return whether EH has pc-relative dynamic relocs. */ |
| 6379 | |
| 6380 | static bfd_boolean |
| 6381 | pc_dynrelocs (struct ppc_link_hash_entry *eh) |
| 6382 | { |
| 6383 | struct elf_dyn_relocs *p; |
| 6384 | |
| 6385 | for (p = eh->elf.dyn_relocs; p != NULL; p = p->next) |
| 6386 | if (p->pc_count != 0) |
| 6387 | return TRUE; |
| 6388 | return FALSE; |
| 6389 | } |
| 6390 | |
| 6391 | /* Return true if a global entry stub will be created for H. Valid |
| 6392 | for ELFv2 before plt entries have been allocated. */ |
| 6393 | |
| 6394 | static bfd_boolean |
| 6395 | global_entry_stub (struct elf_link_hash_entry *h) |
| 6396 | { |
| 6397 | struct plt_entry *pent; |
| 6398 | |
| 6399 | if (!h->pointer_equality_needed |
| 6400 | || h->def_regular) |
| 6401 | return FALSE; |
| 6402 | |
| 6403 | for (pent = h->plt.plist; pent != NULL; pent = pent->next) |
| 6404 | if (pent->plt.refcount > 0 |
| 6405 | && pent->addend == 0) |
| 6406 | return TRUE; |
| 6407 | |
| 6408 | return FALSE; |
| 6409 | } |
| 6410 | |
| 6411 | /* Adjust a symbol defined by a dynamic object and referenced by a |
| 6412 | regular object. The current definition is in some section of the |
| 6413 | dynamic object, but we're not including those sections. We have to |
| 6414 | change the definition to something the rest of the link can |
| 6415 | understand. */ |
| 6416 | |
| 6417 | static bfd_boolean |
| 6418 | ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info, |
| 6419 | struct elf_link_hash_entry *h) |
| 6420 | { |
| 6421 | struct ppc_link_hash_table *htab; |
| 6422 | asection *s, *srel; |
| 6423 | |
| 6424 | htab = ppc_hash_table (info); |
| 6425 | if (htab == NULL) |
| 6426 | return FALSE; |
| 6427 | |
| 6428 | /* Deal with function syms. */ |
| 6429 | if (h->type == STT_FUNC |
| 6430 | || h->type == STT_GNU_IFUNC |
| 6431 | || h->needs_plt) |
| 6432 | { |
| 6433 | bfd_boolean local = (ppc_elf_hash_entry (h)->save_res |
| 6434 | || SYMBOL_CALLS_LOCAL (info, h) |
| 6435 | || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)); |
| 6436 | /* Discard dyn_relocs when non-pic if we've decided that a |
| 6437 | function symbol is local and not an ifunc. We keep dynamic |
| 6438 | relocs for ifuncs when local rather than always emitting a |
| 6439 | plt call stub for them and defining the symbol on the call |
| 6440 | stub. We can't do that for ELFv1 anyway (a function symbol |
| 6441 | is defined on a descriptor, not code) and it can be faster at |
| 6442 | run-time due to not needing to bounce through a stub. The |
| 6443 | dyn_relocs for ifuncs will be applied even in a static |
| 6444 | executable. */ |
| 6445 | if (!bfd_link_pic (info) |
| 6446 | && h->type != STT_GNU_IFUNC |
| 6447 | && local) |
| 6448 | h->dyn_relocs = NULL; |
| 6449 | |
| 6450 | /* Clear procedure linkage table information for any symbol that |
| 6451 | won't need a .plt entry. */ |
| 6452 | struct plt_entry *ent; |
| 6453 | for (ent = h->plt.plist; ent != NULL; ent = ent->next) |
| 6454 | if (ent->plt.refcount > 0) |
| 6455 | break; |
| 6456 | if (ent == NULL |
| 6457 | || (h->type != STT_GNU_IFUNC |
| 6458 | && local |
| 6459 | && (htab->can_convert_all_inline_plt |
| 6460 | || (ppc_elf_hash_entry (h)->tls_mask |
| 6461 | & (TLS_TLS | PLT_KEEP)) != PLT_KEEP))) |
| 6462 | { |
| 6463 | h->plt.plist = NULL; |
| 6464 | h->needs_plt = 0; |
| 6465 | h->pointer_equality_needed = 0; |
| 6466 | } |
| 6467 | else if (abiversion (info->output_bfd) >= 2) |
| 6468 | { |
| 6469 | /* Taking a function's address in a read/write section |
| 6470 | doesn't require us to define the function symbol in the |
| 6471 | executable on a global entry stub. A dynamic reloc can |
| 6472 | be used instead. The reason we prefer a few more dynamic |
| 6473 | relocs is that calling via a global entry stub costs a |
| 6474 | few more instructions, and pointer_equality_needed causes |
| 6475 | extra work in ld.so when resolving these symbols. */ |
| 6476 | if (global_entry_stub (h)) |
| 6477 | { |
| 6478 | if (!_bfd_elf_readonly_dynrelocs (h)) |
| 6479 | { |
| 6480 | h->pointer_equality_needed = 0; |
| 6481 | /* If we haven't seen a branch reloc and the symbol |
| 6482 | isn't an ifunc then we don't need a plt entry. */ |
| 6483 | if (!h->needs_plt) |
| 6484 | h->plt.plist = NULL; |
| 6485 | } |
| 6486 | else if (!bfd_link_pic (info)) |
| 6487 | /* We are going to be defining the function symbol on the |
| 6488 | plt stub, so no dyn_relocs needed when non-pic. */ |
| 6489 | h->dyn_relocs = NULL; |
| 6490 | } |
| 6491 | |
| 6492 | /* ELFv2 function symbols can't have copy relocs. */ |
| 6493 | return TRUE; |
| 6494 | } |
| 6495 | else if (!h->needs_plt |
| 6496 | && !_bfd_elf_readonly_dynrelocs (h)) |
| 6497 | { |
| 6498 | /* If we haven't seen a branch reloc and the symbol isn't an |
| 6499 | ifunc then we don't need a plt entry. */ |
| 6500 | h->plt.plist = NULL; |
| 6501 | h->pointer_equality_needed = 0; |
| 6502 | return TRUE; |
| 6503 | } |
| 6504 | } |
| 6505 | else |
| 6506 | h->plt.plist = NULL; |
| 6507 | |
| 6508 | /* If this is a weak symbol, and there is a real definition, the |
| 6509 | processor independent code will have arranged for us to see the |
| 6510 | real definition first, and we can just use the same value. */ |
| 6511 | if (h->is_weakalias) |
| 6512 | { |
| 6513 | struct elf_link_hash_entry *def = weakdef (h); |
| 6514 | BFD_ASSERT (def->root.type == bfd_link_hash_defined); |
| 6515 | h->root.u.def.section = def->root.u.def.section; |
| 6516 | h->root.u.def.value = def->root.u.def.value; |
| 6517 | if (def->root.u.def.section == htab->elf.sdynbss |
| 6518 | || def->root.u.def.section == htab->elf.sdynrelro) |
| 6519 | h->dyn_relocs = NULL; |
| 6520 | return TRUE; |
| 6521 | } |
| 6522 | |
| 6523 | /* If we are creating a shared library, we must presume that the |
| 6524 | only references to the symbol are via the global offset table. |
| 6525 | For such cases we need not do anything here; the relocations will |
| 6526 | be handled correctly by relocate_section. */ |
| 6527 | if (!bfd_link_executable (info)) |
| 6528 | return TRUE; |
| 6529 | |
| 6530 | /* If there are no references to this symbol that do not use the |
| 6531 | GOT, we don't need to generate a copy reloc. */ |
| 6532 | if (!h->non_got_ref) |
| 6533 | return TRUE; |
| 6534 | |
| 6535 | /* Don't generate a copy reloc for symbols defined in the executable. */ |
| 6536 | if (!h->def_dynamic || !h->ref_regular || h->def_regular |
| 6537 | |
| 6538 | /* If -z nocopyreloc was given, don't generate them either. */ |
| 6539 | || info->nocopyreloc |
| 6540 | |
| 6541 | /* If we don't find any dynamic relocs in read-only sections, then |
| 6542 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ |
| 6543 | || (ELIMINATE_COPY_RELOCS |
| 6544 | && !h->needs_copy |
| 6545 | && !alias_readonly_dynrelocs (h)) |
| 6546 | |
| 6547 | /* Protected variables do not work with .dynbss. The copy in |
| 6548 | .dynbss won't be used by the shared library with the protected |
| 6549 | definition for the variable. Text relocations are preferable |
| 6550 | to an incorrect program. */ |
| 6551 | || h->protected_def) |
| 6552 | return TRUE; |
| 6553 | |
| 6554 | if (h->type == STT_FUNC |
| 6555 | || h->type == STT_GNU_IFUNC) |
| 6556 | { |
| 6557 | /* .dynbss copies of function symbols only work if we have |
| 6558 | ELFv1 dot-symbols. ELFv1 compilers since 2004 default to not |
| 6559 | use dot-symbols and set the function symbol size to the text |
| 6560 | size of the function rather than the size of the descriptor. |
| 6561 | That's wrong for copying a descriptor. */ |
| 6562 | if (ppc_elf_hash_entry (h)->oh == NULL |
| 6563 | || !(h->size == 24 || h->size == 16)) |
| 6564 | return TRUE; |
| 6565 | |
| 6566 | /* We should never get here, but unfortunately there are old |
| 6567 | versions of gcc (circa gcc-3.2) that improperly for the |
| 6568 | ELFv1 ABI put initialized function pointers, vtable refs and |
| 6569 | suchlike in read-only sections. Allow them to proceed, but |
| 6570 | warn that this might break at runtime. */ |
| 6571 | info->callbacks->einfo |
| 6572 | (_("%P: copy reloc against `%pT' requires lazy plt linking; " |
| 6573 | "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"), |
| 6574 | h->root.root.string); |
| 6575 | } |
| 6576 | |
| 6577 | /* This is a reference to a symbol defined by a dynamic object which |
| 6578 | is not a function. */ |
| 6579 | |
| 6580 | /* We must allocate the symbol in our .dynbss section, which will |
| 6581 | become part of the .bss section of the executable. There will be |
| 6582 | an entry for this symbol in the .dynsym section. The dynamic |
| 6583 | object will contain position independent code, so all references |
| 6584 | from the dynamic object to this symbol will go through the global |
| 6585 | offset table. The dynamic linker will use the .dynsym entry to |
| 6586 | determine the address it must put in the global offset table, so |
| 6587 | both the dynamic object and the regular object will refer to the |
| 6588 | same memory location for the variable. */ |
| 6589 | if ((h->root.u.def.section->flags & SEC_READONLY) != 0) |
| 6590 | { |
| 6591 | s = htab->elf.sdynrelro; |
| 6592 | srel = htab->elf.sreldynrelro; |
| 6593 | } |
| 6594 | else |
| 6595 | { |
| 6596 | s = htab->elf.sdynbss; |
| 6597 | srel = htab->elf.srelbss; |
| 6598 | } |
| 6599 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) |
| 6600 | { |
| 6601 | /* We must generate a R_PPC64_COPY reloc to tell the dynamic |
| 6602 | linker to copy the initial value out of the dynamic object |
| 6603 | and into the runtime process image. */ |
| 6604 | srel->size += sizeof (Elf64_External_Rela); |
| 6605 | h->needs_copy = 1; |
| 6606 | } |
| 6607 | |
| 6608 | /* We no longer want dyn_relocs. */ |
| 6609 | h->dyn_relocs = NULL; |
| 6610 | return _bfd_elf_adjust_dynamic_copy (info, h, s); |
| 6611 | } |
| 6612 | |
| 6613 | /* If given a function descriptor symbol, hide both the function code |
| 6614 | sym and the descriptor. */ |
| 6615 | static void |
| 6616 | ppc64_elf_hide_symbol (struct bfd_link_info *info, |
| 6617 | struct elf_link_hash_entry *h, |
| 6618 | bfd_boolean force_local) |
| 6619 | { |
| 6620 | struct ppc_link_hash_entry *eh; |
| 6621 | _bfd_elf_link_hash_hide_symbol (info, h, force_local); |
| 6622 | |
| 6623 | if (ppc_hash_table (info) == NULL) |
| 6624 | return; |
| 6625 | |
| 6626 | eh = ppc_elf_hash_entry (h); |
| 6627 | if (eh->is_func_descriptor) |
| 6628 | { |
| 6629 | struct ppc_link_hash_entry *fh = eh->oh; |
| 6630 | |
| 6631 | if (fh == NULL) |
| 6632 | { |
| 6633 | const char *p, *q; |
| 6634 | struct elf_link_hash_table *htab = elf_hash_table (info); |
| 6635 | char save; |
| 6636 | |
| 6637 | /* We aren't supposed to use alloca in BFD because on |
| 6638 | systems which do not have alloca the version in libiberty |
| 6639 | calls xmalloc, which might cause the program to crash |
| 6640 | when it runs out of memory. This function doesn't have a |
| 6641 | return status, so there's no way to gracefully return an |
| 6642 | error. So cheat. We know that string[-1] can be safely |
| 6643 | accessed; It's either a string in an ELF string table, |
| 6644 | or allocated in an objalloc structure. */ |
| 6645 | |
| 6646 | p = eh->elf.root.root.string - 1; |
| 6647 | save = *p; |
| 6648 | *(char *) p = '.'; |
| 6649 | fh = ppc_elf_hash_entry (elf_link_hash_lookup (htab, p, FALSE, |
| 6650 | FALSE, FALSE)); |
| 6651 | *(char *) p = save; |
| 6652 | |
| 6653 | /* Unfortunately, if it so happens that the string we were |
| 6654 | looking for was allocated immediately before this string, |
| 6655 | then we overwrote the string terminator. That's the only |
| 6656 | reason the lookup should fail. */ |
| 6657 | if (fh == NULL) |
| 6658 | { |
| 6659 | q = eh->elf.root.root.string + strlen (eh->elf.root.root.string); |
| 6660 | while (q >= eh->elf.root.root.string && *q == *p) |
| 6661 | --q, --p; |
| 6662 | if (q < eh->elf.root.root.string && *p == '.') |
| 6663 | fh = ppc_elf_hash_entry (elf_link_hash_lookup (htab, p, FALSE, |
| 6664 | FALSE, FALSE)); |
| 6665 | } |
| 6666 | if (fh != NULL) |
| 6667 | { |
| 6668 | eh->oh = fh; |
| 6669 | fh->oh = eh; |
| 6670 | } |
| 6671 | } |
| 6672 | if (fh != NULL) |
| 6673 | _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local); |
| 6674 | } |
| 6675 | } |
| 6676 | |
| 6677 | static bfd_boolean |
| 6678 | get_sym_h (struct elf_link_hash_entry **hp, |
| 6679 | Elf_Internal_Sym **symp, |
| 6680 | asection **symsecp, |
| 6681 | unsigned char **tls_maskp, |
| 6682 | Elf_Internal_Sym **locsymsp, |
| 6683 | unsigned long r_symndx, |
| 6684 | bfd *ibfd) |
| 6685 | { |
| 6686 | Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd); |
| 6687 | |
| 6688 | if (r_symndx >= symtab_hdr->sh_info) |
| 6689 | { |
| 6690 | struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd); |
| 6691 | struct elf_link_hash_entry *h; |
| 6692 | |
| 6693 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 6694 | h = elf_follow_link (h); |
| 6695 | |
| 6696 | if (hp != NULL) |
| 6697 | *hp = h; |
| 6698 | |
| 6699 | if (symp != NULL) |
| 6700 | *symp = NULL; |
| 6701 | |
| 6702 | if (symsecp != NULL) |
| 6703 | { |
| 6704 | asection *symsec = NULL; |
| 6705 | if (h->root.type == bfd_link_hash_defined |
| 6706 | || h->root.type == bfd_link_hash_defweak) |
| 6707 | symsec = h->root.u.def.section; |
| 6708 | *symsecp = symsec; |
| 6709 | } |
| 6710 | |
| 6711 | if (tls_maskp != NULL) |
| 6712 | *tls_maskp = &ppc_elf_hash_entry (h)->tls_mask; |
| 6713 | } |
| 6714 | else |
| 6715 | { |
| 6716 | Elf_Internal_Sym *sym; |
| 6717 | Elf_Internal_Sym *locsyms = *locsymsp; |
| 6718 | |
| 6719 | if (locsyms == NULL) |
| 6720 | { |
| 6721 | locsyms = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 6722 | if (locsyms == NULL) |
| 6723 | locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr, |
| 6724 | symtab_hdr->sh_info, |
| 6725 | 0, NULL, NULL, NULL); |
| 6726 | if (locsyms == NULL) |
| 6727 | return FALSE; |
| 6728 | *locsymsp = locsyms; |
| 6729 | } |
| 6730 | sym = locsyms + r_symndx; |
| 6731 | |
| 6732 | if (hp != NULL) |
| 6733 | *hp = NULL; |
| 6734 | |
| 6735 | if (symp != NULL) |
| 6736 | *symp = sym; |
| 6737 | |
| 6738 | if (symsecp != NULL) |
| 6739 | *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx); |
| 6740 | |
| 6741 | if (tls_maskp != NULL) |
| 6742 | { |
| 6743 | struct got_entry **lgot_ents; |
| 6744 | unsigned char *tls_mask; |
| 6745 | |
| 6746 | tls_mask = NULL; |
| 6747 | lgot_ents = elf_local_got_ents (ibfd); |
| 6748 | if (lgot_ents != NULL) |
| 6749 | { |
| 6750 | struct plt_entry **local_plt = (struct plt_entry **) |
| 6751 | (lgot_ents + symtab_hdr->sh_info); |
| 6752 | unsigned char *lgot_masks = (unsigned char *) |
| 6753 | (local_plt + symtab_hdr->sh_info); |
| 6754 | tls_mask = &lgot_masks[r_symndx]; |
| 6755 | } |
| 6756 | *tls_maskp = tls_mask; |
| 6757 | } |
| 6758 | } |
| 6759 | return TRUE; |
| 6760 | } |
| 6761 | |
| 6762 | /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on |
| 6763 | error, 2 on a toc GD type suitable for optimization, 3 on a toc LD |
| 6764 | type suitable for optimization, and 1 otherwise. */ |
| 6765 | |
| 6766 | static int |
| 6767 | get_tls_mask (unsigned char **tls_maskp, |
| 6768 | unsigned long *toc_symndx, |
| 6769 | bfd_vma *toc_addend, |
| 6770 | Elf_Internal_Sym **locsymsp, |
| 6771 | const Elf_Internal_Rela *rel, |
| 6772 | bfd *ibfd) |
| 6773 | { |
| 6774 | unsigned long r_symndx; |
| 6775 | int next_r; |
| 6776 | struct elf_link_hash_entry *h; |
| 6777 | Elf_Internal_Sym *sym; |
| 6778 | asection *sec; |
| 6779 | bfd_vma off; |
| 6780 | |
| 6781 | r_symndx = ELF64_R_SYM (rel->r_info); |
| 6782 | if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd)) |
| 6783 | return 0; |
| 6784 | |
| 6785 | if ((*tls_maskp != NULL |
| 6786 | && (**tls_maskp & TLS_TLS) != 0 |
| 6787 | && **tls_maskp != (TLS_TLS | TLS_MARK)) |
| 6788 | || sec == NULL |
| 6789 | || ppc64_elf_section_data (sec) == NULL |
| 6790 | || ppc64_elf_section_data (sec)->sec_type != sec_toc) |
| 6791 | return 1; |
| 6792 | |
| 6793 | /* Look inside a TOC section too. */ |
| 6794 | if (h != NULL) |
| 6795 | { |
| 6796 | BFD_ASSERT (h->root.type == bfd_link_hash_defined); |
| 6797 | off = h->root.u.def.value; |
| 6798 | } |
| 6799 | else |
| 6800 | off = sym->st_value; |
| 6801 | off += rel->r_addend; |
| 6802 | BFD_ASSERT (off % 8 == 0); |
| 6803 | r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8]; |
| 6804 | next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1]; |
| 6805 | if (toc_symndx != NULL) |
| 6806 | *toc_symndx = r_symndx; |
| 6807 | if (toc_addend != NULL) |
| 6808 | *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8]; |
| 6809 | if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd)) |
| 6810 | return 0; |
| 6811 | if ((h == NULL || is_static_defined (h)) |
| 6812 | && (next_r == -1 || next_r == -2)) |
| 6813 | return 1 - next_r; |
| 6814 | return 1; |
| 6815 | } |
| 6816 | |
| 6817 | /* Find (or create) an entry in the tocsave hash table. */ |
| 6818 | |
| 6819 | static struct tocsave_entry * |
| 6820 | tocsave_find (struct ppc_link_hash_table *htab, |
| 6821 | enum insert_option insert, |
| 6822 | Elf_Internal_Sym **local_syms, |
| 6823 | const Elf_Internal_Rela *irela, |
| 6824 | bfd *ibfd) |
| 6825 | { |
| 6826 | unsigned long r_indx; |
| 6827 | struct elf_link_hash_entry *h; |
| 6828 | Elf_Internal_Sym *sym; |
| 6829 | struct tocsave_entry ent, *p; |
| 6830 | hashval_t hash; |
| 6831 | struct tocsave_entry **slot; |
| 6832 | |
| 6833 | r_indx = ELF64_R_SYM (irela->r_info); |
| 6834 | if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd)) |
| 6835 | return NULL; |
| 6836 | if (ent.sec == NULL || ent.sec->output_section == NULL) |
| 6837 | { |
| 6838 | _bfd_error_handler |
| 6839 | (_("%pB: undefined symbol on R_PPC64_TOCSAVE relocation"), ibfd); |
| 6840 | return NULL; |
| 6841 | } |
| 6842 | |
| 6843 | if (h != NULL) |
| 6844 | ent.offset = h->root.u.def.value; |
| 6845 | else |
| 6846 | ent.offset = sym->st_value; |
| 6847 | ent.offset += irela->r_addend; |
| 6848 | |
| 6849 | hash = tocsave_htab_hash (&ent); |
| 6850 | slot = ((struct tocsave_entry **) |
| 6851 | htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert)); |
| 6852 | if (slot == NULL) |
| 6853 | return NULL; |
| 6854 | |
| 6855 | if (*slot == NULL) |
| 6856 | { |
| 6857 | p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p)); |
| 6858 | if (p == NULL) |
| 6859 | return NULL; |
| 6860 | *p = ent; |
| 6861 | *slot = p; |
| 6862 | } |
| 6863 | return *slot; |
| 6864 | } |
| 6865 | |
| 6866 | /* Adjust all global syms defined in opd sections. In gcc generated |
| 6867 | code for the old ABI, these will already have been done. */ |
| 6868 | |
| 6869 | static bfd_boolean |
| 6870 | adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED) |
| 6871 | { |
| 6872 | struct ppc_link_hash_entry *eh; |
| 6873 | asection *sym_sec; |
| 6874 | struct _opd_sec_data *opd; |
| 6875 | |
| 6876 | if (h->root.type == bfd_link_hash_indirect) |
| 6877 | return TRUE; |
| 6878 | |
| 6879 | if (h->root.type != bfd_link_hash_defined |
| 6880 | && h->root.type != bfd_link_hash_defweak) |
| 6881 | return TRUE; |
| 6882 | |
| 6883 | eh = ppc_elf_hash_entry (h); |
| 6884 | if (eh->adjust_done) |
| 6885 | return TRUE; |
| 6886 | |
| 6887 | sym_sec = eh->elf.root.u.def.section; |
| 6888 | opd = get_opd_info (sym_sec); |
| 6889 | if (opd != NULL && opd->adjust != NULL) |
| 6890 | { |
| 6891 | long adjust = opd->adjust[OPD_NDX (eh->elf.root.u.def.value)]; |
| 6892 | if (adjust == -1) |
| 6893 | { |
| 6894 | /* This entry has been deleted. */ |
| 6895 | asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section; |
| 6896 | if (dsec == NULL) |
| 6897 | { |
| 6898 | for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next) |
| 6899 | if (discarded_section (dsec)) |
| 6900 | { |
| 6901 | ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec; |
| 6902 | break; |
| 6903 | } |
| 6904 | } |
| 6905 | eh->elf.root.u.def.value = 0; |
| 6906 | eh->elf.root.u.def.section = dsec; |
| 6907 | } |
| 6908 | else |
| 6909 | eh->elf.root.u.def.value += adjust; |
| 6910 | eh->adjust_done = 1; |
| 6911 | } |
| 6912 | return TRUE; |
| 6913 | } |
| 6914 | |
| 6915 | /* Handles decrementing dynamic reloc counts for the reloc specified by |
| 6916 | R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM |
| 6917 | have already been determined. */ |
| 6918 | |
| 6919 | static bfd_boolean |
| 6920 | dec_dynrel_count (bfd_vma r_info, |
| 6921 | asection *sec, |
| 6922 | struct bfd_link_info *info, |
| 6923 | Elf_Internal_Sym **local_syms, |
| 6924 | struct elf_link_hash_entry *h, |
| 6925 | Elf_Internal_Sym *sym) |
| 6926 | { |
| 6927 | enum elf_ppc64_reloc_type r_type; |
| 6928 | asection *sym_sec = NULL; |
| 6929 | |
| 6930 | /* Can this reloc be dynamic? This switch, and later tests here |
| 6931 | should be kept in sync with the code in check_relocs. */ |
| 6932 | r_type = ELF64_R_TYPE (r_info); |
| 6933 | switch (r_type) |
| 6934 | { |
| 6935 | default: |
| 6936 | return TRUE; |
| 6937 | |
| 6938 | case R_PPC64_TOC16: |
| 6939 | case R_PPC64_TOC16_DS: |
| 6940 | case R_PPC64_TOC16_LO: |
| 6941 | case R_PPC64_TOC16_HI: |
| 6942 | case R_PPC64_TOC16_HA: |
| 6943 | case R_PPC64_TOC16_LO_DS: |
| 6944 | if (h == NULL) |
| 6945 | return TRUE; |
| 6946 | break; |
| 6947 | |
| 6948 | case R_PPC64_TPREL16: |
| 6949 | case R_PPC64_TPREL16_LO: |
| 6950 | case R_PPC64_TPREL16_HI: |
| 6951 | case R_PPC64_TPREL16_HA: |
| 6952 | case R_PPC64_TPREL16_DS: |
| 6953 | case R_PPC64_TPREL16_LO_DS: |
| 6954 | case R_PPC64_TPREL16_HIGH: |
| 6955 | case R_PPC64_TPREL16_HIGHA: |
| 6956 | case R_PPC64_TPREL16_HIGHER: |
| 6957 | case R_PPC64_TPREL16_HIGHERA: |
| 6958 | case R_PPC64_TPREL16_HIGHEST: |
| 6959 | case R_PPC64_TPREL16_HIGHESTA: |
| 6960 | case R_PPC64_TPREL64: |
| 6961 | case R_PPC64_TPREL34: |
| 6962 | case R_PPC64_DTPMOD64: |
| 6963 | case R_PPC64_DTPREL64: |
| 6964 | case R_PPC64_ADDR64: |
| 6965 | case R_PPC64_REL30: |
| 6966 | case R_PPC64_REL32: |
| 6967 | case R_PPC64_REL64: |
| 6968 | case R_PPC64_ADDR14: |
| 6969 | case R_PPC64_ADDR14_BRNTAKEN: |
| 6970 | case R_PPC64_ADDR14_BRTAKEN: |
| 6971 | case R_PPC64_ADDR16: |
| 6972 | case R_PPC64_ADDR16_DS: |
| 6973 | case R_PPC64_ADDR16_HA: |
| 6974 | case R_PPC64_ADDR16_HI: |
| 6975 | case R_PPC64_ADDR16_HIGH: |
| 6976 | case R_PPC64_ADDR16_HIGHA: |
| 6977 | case R_PPC64_ADDR16_HIGHER: |
| 6978 | case R_PPC64_ADDR16_HIGHERA: |
| 6979 | case R_PPC64_ADDR16_HIGHEST: |
| 6980 | case R_PPC64_ADDR16_HIGHESTA: |
| 6981 | case R_PPC64_ADDR16_LO: |
| 6982 | case R_PPC64_ADDR16_LO_DS: |
| 6983 | case R_PPC64_ADDR24: |
| 6984 | case R_PPC64_ADDR32: |
| 6985 | case R_PPC64_UADDR16: |
| 6986 | case R_PPC64_UADDR32: |
| 6987 | case R_PPC64_UADDR64: |
| 6988 | case R_PPC64_TOC: |
| 6989 | case R_PPC64_D34: |
| 6990 | case R_PPC64_D34_LO: |
| 6991 | case R_PPC64_D34_HI30: |
| 6992 | case R_PPC64_D34_HA30: |
| 6993 | case R_PPC64_ADDR16_HIGHER34: |
| 6994 | case R_PPC64_ADDR16_HIGHERA34: |
| 6995 | case R_PPC64_ADDR16_HIGHEST34: |
| 6996 | case R_PPC64_ADDR16_HIGHESTA34: |
| 6997 | case R_PPC64_D28: |
| 6998 | break; |
| 6999 | } |
| 7000 | |
| 7001 | if (local_syms != NULL) |
| 7002 | { |
| 7003 | unsigned long r_symndx; |
| 7004 | bfd *ibfd = sec->owner; |
| 7005 | |
| 7006 | r_symndx = ELF64_R_SYM (r_info); |
| 7007 | if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd)) |
| 7008 | return FALSE; |
| 7009 | } |
| 7010 | |
| 7011 | if ((h != NULL |
| 7012 | && (h->root.type == bfd_link_hash_defweak |
| 7013 | || !h->def_regular)) |
| 7014 | || (h != NULL |
| 7015 | && !bfd_link_executable (info) |
| 7016 | && !SYMBOLIC_BIND (info, h)) |
| 7017 | || (bfd_link_pic (info) |
| 7018 | && must_be_dyn_reloc (info, r_type)) |
| 7019 | || (!bfd_link_pic (info) |
| 7020 | && (h != NULL |
| 7021 | ? h->type == STT_GNU_IFUNC |
| 7022 | : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))) |
| 7023 | ; |
| 7024 | else |
| 7025 | return TRUE; |
| 7026 | |
| 7027 | if (h != NULL) |
| 7028 | { |
| 7029 | struct elf_dyn_relocs *p; |
| 7030 | struct elf_dyn_relocs **pp; |
| 7031 | pp = &h->dyn_relocs; |
| 7032 | |
| 7033 | /* elf_gc_sweep may have already removed all dyn relocs associated |
| 7034 | with local syms for a given section. Also, symbol flags are |
| 7035 | changed by elf_gc_sweep_symbol, confusing the test above. Don't |
| 7036 | report a dynreloc miscount. */ |
| 7037 | if (*pp == NULL && info->gc_sections) |
| 7038 | return TRUE; |
| 7039 | |
| 7040 | while ((p = *pp) != NULL) |
| 7041 | { |
| 7042 | if (p->sec == sec) |
| 7043 | { |
| 7044 | if (!must_be_dyn_reloc (info, r_type)) |
| 7045 | p->pc_count -= 1; |
| 7046 | p->count -= 1; |
| 7047 | if (p->count == 0) |
| 7048 | *pp = p->next; |
| 7049 | return TRUE; |
| 7050 | } |
| 7051 | pp = &p->next; |
| 7052 | } |
| 7053 | } |
| 7054 | else |
| 7055 | { |
| 7056 | struct ppc_dyn_relocs *p; |
| 7057 | struct ppc_dyn_relocs **pp; |
| 7058 | void *vpp; |
| 7059 | bfd_boolean is_ifunc; |
| 7060 | |
| 7061 | if (local_syms == NULL) |
| 7062 | sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx); |
| 7063 | if (sym_sec == NULL) |
| 7064 | sym_sec = sec; |
| 7065 | |
| 7066 | vpp = &elf_section_data (sym_sec)->local_dynrel; |
| 7067 | pp = (struct ppc_dyn_relocs **) vpp; |
| 7068 | |
| 7069 | if (*pp == NULL && info->gc_sections) |
| 7070 | return TRUE; |
| 7071 | |
| 7072 | is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC; |
| 7073 | while ((p = *pp) != NULL) |
| 7074 | { |
| 7075 | if (p->sec == sec && p->ifunc == is_ifunc) |
| 7076 | { |
| 7077 | p->count -= 1; |
| 7078 | if (p->count == 0) |
| 7079 | *pp = p->next; |
| 7080 | return TRUE; |
| 7081 | } |
| 7082 | pp = &p->next; |
| 7083 | } |
| 7084 | } |
| 7085 | |
| 7086 | /* xgettext:c-format */ |
| 7087 | _bfd_error_handler (_("dynreloc miscount for %pB, section %pA"), |
| 7088 | sec->owner, sec); |
| 7089 | bfd_set_error (bfd_error_bad_value); |
| 7090 | return FALSE; |
| 7091 | } |
| 7092 | |
| 7093 | /* Remove unused Official Procedure Descriptor entries. Currently we |
| 7094 | only remove those associated with functions in discarded link-once |
| 7095 | sections, or weakly defined functions that have been overridden. It |
| 7096 | would be possible to remove many more entries for statically linked |
| 7097 | applications. */ |
| 7098 | |
| 7099 | bfd_boolean |
| 7100 | ppc64_elf_edit_opd (struct bfd_link_info *info) |
| 7101 | { |
| 7102 | bfd *ibfd; |
| 7103 | bfd_boolean some_edited = FALSE; |
| 7104 | asection *need_pad = NULL; |
| 7105 | struct ppc_link_hash_table *htab; |
| 7106 | |
| 7107 | htab = ppc_hash_table (info); |
| 7108 | if (htab == NULL) |
| 7109 | return FALSE; |
| 7110 | |
| 7111 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
| 7112 | { |
| 7113 | asection *sec; |
| 7114 | Elf_Internal_Rela *relstart, *rel, *relend; |
| 7115 | Elf_Internal_Shdr *symtab_hdr; |
| 7116 | Elf_Internal_Sym *local_syms; |
| 7117 | struct _opd_sec_data *opd; |
| 7118 | bfd_boolean need_edit, add_aux_fields, broken; |
| 7119 | bfd_size_type cnt_16b = 0; |
| 7120 | |
| 7121 | if (!is_ppc64_elf (ibfd)) |
| 7122 | continue; |
| 7123 | |
| 7124 | sec = bfd_get_section_by_name (ibfd, ".opd"); |
| 7125 | if (sec == NULL || sec->size == 0) |
| 7126 | continue; |
| 7127 | |
| 7128 | if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS) |
| 7129 | continue; |
| 7130 | |
| 7131 | if (sec->output_section == bfd_abs_section_ptr) |
| 7132 | continue; |
| 7133 | |
| 7134 | /* Look through the section relocs. */ |
| 7135 | if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0) |
| 7136 | continue; |
| 7137 | |
| 7138 | local_syms = NULL; |
| 7139 | symtab_hdr = &elf_symtab_hdr (ibfd); |
| 7140 | |
| 7141 | /* Read the relocations. */ |
| 7142 | relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, |
| 7143 | info->keep_memory); |
| 7144 | if (relstart == NULL) |
| 7145 | return FALSE; |
| 7146 | |
| 7147 | /* First run through the relocs to check they are sane, and to |
| 7148 | determine whether we need to edit this opd section. */ |
| 7149 | need_edit = FALSE; |
| 7150 | broken = FALSE; |
| 7151 | need_pad = sec; |
| 7152 | relend = relstart + sec->reloc_count; |
| 7153 | for (rel = relstart; rel < relend; ) |
| 7154 | { |
| 7155 | enum elf_ppc64_reloc_type r_type; |
| 7156 | unsigned long r_symndx; |
| 7157 | asection *sym_sec; |
| 7158 | struct elf_link_hash_entry *h; |
| 7159 | Elf_Internal_Sym *sym; |
| 7160 | bfd_vma offset; |
| 7161 | |
| 7162 | /* .opd contains an array of 16 or 24 byte entries. We're |
| 7163 | only interested in the reloc pointing to a function entry |
| 7164 | point. */ |
| 7165 | offset = rel->r_offset; |
| 7166 | if (rel + 1 == relend |
| 7167 | || rel[1].r_offset != offset + 8) |
| 7168 | { |
| 7169 | /* If someone messes with .opd alignment then after a |
| 7170 | "ld -r" we might have padding in the middle of .opd. |
| 7171 | Also, there's nothing to prevent someone putting |
| 7172 | something silly in .opd with the assembler. No .opd |
| 7173 | optimization for them! */ |
| 7174 | broken_opd: |
| 7175 | _bfd_error_handler |
| 7176 | (_("%pB: .opd is not a regular array of opd entries"), ibfd); |
| 7177 | broken = TRUE; |
| 7178 | break; |
| 7179 | } |
| 7180 | |
| 7181 | if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64 |
| 7182 | || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC) |
| 7183 | { |
| 7184 | _bfd_error_handler |
| 7185 | /* xgettext:c-format */ |
| 7186 | (_("%pB: unexpected reloc type %u in .opd section"), |
| 7187 | ibfd, r_type); |
| 7188 | broken = TRUE; |
| 7189 | break; |
| 7190 | } |
| 7191 | |
| 7192 | r_symndx = ELF64_R_SYM (rel->r_info); |
| 7193 | if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, |
| 7194 | r_symndx, ibfd)) |
| 7195 | goto error_ret; |
| 7196 | |
| 7197 | if (sym_sec == NULL || sym_sec->owner == NULL) |
| 7198 | { |
| 7199 | const char *sym_name; |
| 7200 | if (h != NULL) |
| 7201 | sym_name = h->root.root.string; |
| 7202 | else |
| 7203 | sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym, |
| 7204 | sym_sec); |
| 7205 | |
| 7206 | _bfd_error_handler |
| 7207 | /* xgettext:c-format */ |
| 7208 | (_("%pB: undefined sym `%s' in .opd section"), |
| 7209 | ibfd, sym_name); |
| 7210 | broken = TRUE; |
| 7211 | break; |
| 7212 | } |
| 7213 | |
| 7214 | /* opd entries are always for functions defined in the |
| 7215 | current input bfd. If the symbol isn't defined in the |
| 7216 | input bfd, then we won't be using the function in this |
| 7217 | bfd; It must be defined in a linkonce section in another |
| 7218 | bfd, or is weak. It's also possible that we are |
| 7219 | discarding the function due to a linker script /DISCARD/, |
| 7220 | which we test for via the output_section. */ |
| 7221 | if (sym_sec->owner != ibfd |
| 7222 | || sym_sec->output_section == bfd_abs_section_ptr) |
| 7223 | need_edit = TRUE; |
| 7224 | |
| 7225 | rel += 2; |
| 7226 | if (rel + 1 == relend |
| 7227 | || (rel + 2 < relend |
| 7228 | && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)) |
| 7229 | ++rel; |
| 7230 | |
| 7231 | if (rel == relend) |
| 7232 | { |
| 7233 | if (sec->size == offset + 24) |
| 7234 | { |
| 7235 | need_pad = NULL; |
| 7236 | break; |
| 7237 | } |
| 7238 | if (sec->size == offset + 16) |
| 7239 | { |
| 7240 | cnt_16b++; |
| 7241 | break; |
| 7242 | } |
| 7243 | goto broken_opd; |
| 7244 | } |
| 7245 | else if (rel + 1 < relend |
| 7246 | && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64 |
| 7247 | && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC) |
| 7248 | { |
| 7249 | if (rel[0].r_offset == offset + 16) |
| 7250 | cnt_16b++; |
| 7251 | else if (rel[0].r_offset != offset + 24) |
| 7252 | goto broken_opd; |
| 7253 | } |
| 7254 | else |
| 7255 | goto broken_opd; |
| 7256 | } |
| 7257 | |
| 7258 | add_aux_fields = htab->params->non_overlapping_opd && cnt_16b > 0; |
| 7259 | |
| 7260 | if (!broken && (need_edit || add_aux_fields)) |
| 7261 | { |
| 7262 | Elf_Internal_Rela *write_rel; |
| 7263 | Elf_Internal_Shdr *rel_hdr; |
| 7264 | bfd_byte *rptr, *wptr; |
| 7265 | bfd_byte *new_contents; |
| 7266 | bfd_size_type amt; |
| 7267 | |
| 7268 | new_contents = NULL; |
| 7269 | amt = OPD_NDX (sec->size) * sizeof (long); |
| 7270 | opd = &ppc64_elf_section_data (sec)->u.opd; |
| 7271 | opd->adjust = bfd_zalloc (sec->owner, amt); |
| 7272 | if (opd->adjust == NULL) |
| 7273 | return FALSE; |
| 7274 | |
| 7275 | /* This seems a waste of time as input .opd sections are all |
| 7276 | zeros as generated by gcc, but I suppose there's no reason |
| 7277 | this will always be so. We might start putting something in |
| 7278 | the third word of .opd entries. */ |
| 7279 | if ((sec->flags & SEC_IN_MEMORY) == 0) |
| 7280 | { |
| 7281 | bfd_byte *loc; |
| 7282 | if (!bfd_malloc_and_get_section (ibfd, sec, &loc)) |
| 7283 | { |
| 7284 | free (loc); |
| 7285 | error_ret: |
| 7286 | if (symtab_hdr->contents != (unsigned char *) local_syms) |
| 7287 | free (local_syms); |
| 7288 | if (elf_section_data (sec)->relocs != relstart) |
| 7289 | free (relstart); |
| 7290 | return FALSE; |
| 7291 | } |
| 7292 | sec->contents = loc; |
| 7293 | sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS); |
| 7294 | } |
| 7295 | |
| 7296 | elf_section_data (sec)->relocs = relstart; |
| 7297 | |
| 7298 | new_contents = sec->contents; |
| 7299 | if (add_aux_fields) |
| 7300 | { |
| 7301 | new_contents = bfd_malloc (sec->size + cnt_16b * 8); |
| 7302 | if (new_contents == NULL) |
| 7303 | return FALSE; |
| 7304 | need_pad = NULL; |
| 7305 | } |
| 7306 | wptr = new_contents; |
| 7307 | rptr = sec->contents; |
| 7308 | write_rel = relstart; |
| 7309 | for (rel = relstart; rel < relend; ) |
| 7310 | { |
| 7311 | unsigned long r_symndx; |
| 7312 | asection *sym_sec; |
| 7313 | struct elf_link_hash_entry *h; |
| 7314 | struct ppc_link_hash_entry *fdh = NULL; |
| 7315 | Elf_Internal_Sym *sym; |
| 7316 | long opd_ent_size; |
| 7317 | Elf_Internal_Rela *next_rel; |
| 7318 | bfd_boolean skip; |
| 7319 | |
| 7320 | r_symndx = ELF64_R_SYM (rel->r_info); |
| 7321 | if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, |
| 7322 | r_symndx, ibfd)) |
| 7323 | goto error_ret; |
| 7324 | |
| 7325 | next_rel = rel + 2; |
| 7326 | if (next_rel + 1 == relend |
| 7327 | || (next_rel + 2 < relend |
| 7328 | && ELF64_R_TYPE (next_rel[2].r_info) == R_PPC64_TOC)) |
| 7329 | ++next_rel; |
| 7330 | |
| 7331 | /* See if the .opd entry is full 24 byte or |
| 7332 | 16 byte (with fd_aux entry overlapped with next |
| 7333 | fd_func). */ |
| 7334 | opd_ent_size = 24; |
| 7335 | if (next_rel == relend) |
| 7336 | { |
| 7337 | if (sec->size == rel->r_offset + 16) |
| 7338 | opd_ent_size = 16; |
| 7339 | } |
| 7340 | else if (next_rel->r_offset == rel->r_offset + 16) |
| 7341 | opd_ent_size = 16; |
| 7342 | |
| 7343 | if (h != NULL |
| 7344 | && h->root.root.string[0] == '.') |
| 7345 | { |
| 7346 | fdh = ppc_elf_hash_entry (h)->oh; |
| 7347 | if (fdh != NULL) |
| 7348 | { |
| 7349 | fdh = ppc_follow_link (fdh); |
| 7350 | if (fdh->elf.root.type != bfd_link_hash_defined |
| 7351 | && fdh->elf.root.type != bfd_link_hash_defweak) |
| 7352 | fdh = NULL; |
| 7353 | } |
| 7354 | } |
| 7355 | |
| 7356 | skip = (sym_sec->owner != ibfd |
| 7357 | || sym_sec->output_section == bfd_abs_section_ptr); |
| 7358 | if (skip) |
| 7359 | { |
| 7360 | if (fdh != NULL && sym_sec->owner == ibfd) |
| 7361 | { |
| 7362 | /* Arrange for the function descriptor sym |
| 7363 | to be dropped. */ |
| 7364 | fdh->elf.root.u.def.value = 0; |
| 7365 | fdh->elf.root.u.def.section = sym_sec; |
| 7366 | } |
| 7367 | opd->adjust[OPD_NDX (rel->r_offset)] = -1; |
| 7368 | |
| 7369 | if (NO_OPD_RELOCS || bfd_link_relocatable (info)) |
| 7370 | rel = next_rel; |
| 7371 | else |
| 7372 | while (1) |
| 7373 | { |
| 7374 | if (!dec_dynrel_count (rel->r_info, sec, info, |
| 7375 | NULL, h, sym)) |
| 7376 | goto error_ret; |
| 7377 | |
| 7378 | if (++rel == next_rel) |
| 7379 | break; |
| 7380 | |
| 7381 | r_symndx = ELF64_R_SYM (rel->r_info); |
| 7382 | if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, |
| 7383 | r_symndx, ibfd)) |
| 7384 | goto error_ret; |
| 7385 | } |
| 7386 | } |
| 7387 | else |
| 7388 | { |
| 7389 | /* We'll be keeping this opd entry. */ |
| 7390 | long adjust; |
| 7391 | |
| 7392 | if (fdh != NULL) |
| 7393 | { |
| 7394 | /* Redefine the function descriptor symbol to |
| 7395 | this location in the opd section. It is |
| 7396 | necessary to update the value here rather |
| 7397 | than using an array of adjustments as we do |
| 7398 | for local symbols, because various places |
| 7399 | in the generic ELF code use the value |
| 7400 | stored in u.def.value. */ |
| 7401 | fdh->elf.root.u.def.value = wptr - new_contents; |
| 7402 | fdh->adjust_done = 1; |
| 7403 | } |
| 7404 | |
| 7405 | /* Local syms are a bit tricky. We could |
| 7406 | tweak them as they can be cached, but |
| 7407 | we'd need to look through the local syms |
| 7408 | for the function descriptor sym which we |
| 7409 | don't have at the moment. So keep an |
| 7410 | array of adjustments. */ |
| 7411 | adjust = (wptr - new_contents) - (rptr - sec->contents); |
| 7412 | opd->adjust[OPD_NDX (rel->r_offset)] = adjust; |
| 7413 | |
| 7414 | if (wptr != rptr) |
| 7415 | memcpy (wptr, rptr, opd_ent_size); |
| 7416 | wptr += opd_ent_size; |
| 7417 | if (add_aux_fields && opd_ent_size == 16) |
| 7418 | { |
| 7419 | memset (wptr, '\0', 8); |
| 7420 | wptr += 8; |
| 7421 | } |
| 7422 | |
| 7423 | /* We need to adjust any reloc offsets to point to the |
| 7424 | new opd entries. */ |
| 7425 | for ( ; rel != next_rel; ++rel) |
| 7426 | { |
| 7427 | rel->r_offset += adjust; |
| 7428 | if (write_rel != rel) |
| 7429 | memcpy (write_rel, rel, sizeof (*rel)); |
| 7430 | ++write_rel; |
| 7431 | } |
| 7432 | } |
| 7433 | |
| 7434 | rptr += opd_ent_size; |
| 7435 | } |
| 7436 | |
| 7437 | sec->size = wptr - new_contents; |
| 7438 | sec->reloc_count = write_rel - relstart; |
| 7439 | if (add_aux_fields) |
| 7440 | { |
| 7441 | free (sec->contents); |
| 7442 | sec->contents = new_contents; |
| 7443 | } |
| 7444 | |
| 7445 | /* Fudge the header size too, as this is used later in |
| 7446 | elf_bfd_final_link if we are emitting relocs. */ |
| 7447 | rel_hdr = _bfd_elf_single_rel_hdr (sec); |
| 7448 | rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize; |
| 7449 | some_edited = TRUE; |
| 7450 | } |
| 7451 | else if (elf_section_data (sec)->relocs != relstart) |
| 7452 | free (relstart); |
| 7453 | |
| 7454 | if (local_syms != NULL |
| 7455 | && symtab_hdr->contents != (unsigned char *) local_syms) |
| 7456 | { |
| 7457 | if (!info->keep_memory) |
| 7458 | free (local_syms); |
| 7459 | else |
| 7460 | symtab_hdr->contents = (unsigned char *) local_syms; |
| 7461 | } |
| 7462 | } |
| 7463 | |
| 7464 | if (some_edited) |
| 7465 | elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL); |
| 7466 | |
| 7467 | /* If we are doing a final link and the last .opd entry is just 16 byte |
| 7468 | long, add a 8 byte padding after it. */ |
| 7469 | if (need_pad != NULL && !bfd_link_relocatable (info)) |
| 7470 | { |
| 7471 | bfd_byte *p; |
| 7472 | |
| 7473 | if ((need_pad->flags & SEC_IN_MEMORY) == 0) |
| 7474 | { |
| 7475 | BFD_ASSERT (need_pad->size > 0); |
| 7476 | |
| 7477 | p = bfd_malloc (need_pad->size + 8); |
| 7478 | if (p == NULL) |
| 7479 | return FALSE; |
| 7480 | |
| 7481 | if (!bfd_get_section_contents (need_pad->owner, need_pad, |
| 7482 | p, 0, need_pad->size)) |
| 7483 | return FALSE; |
| 7484 | |
| 7485 | need_pad->contents = p; |
| 7486 | need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS); |
| 7487 | } |
| 7488 | else |
| 7489 | { |
| 7490 | p = bfd_realloc (need_pad->contents, need_pad->size + 8); |
| 7491 | if (p == NULL) |
| 7492 | return FALSE; |
| 7493 | |
| 7494 | need_pad->contents = p; |
| 7495 | } |
| 7496 | |
| 7497 | memset (need_pad->contents + need_pad->size, 0, 8); |
| 7498 | need_pad->size += 8; |
| 7499 | } |
| 7500 | |
| 7501 | return TRUE; |
| 7502 | } |
| 7503 | |
| 7504 | /* Analyze inline PLT call relocations to see whether calls to locally |
| 7505 | defined functions can be converted to direct calls. */ |
| 7506 | |
| 7507 | bfd_boolean |
| 7508 | ppc64_elf_inline_plt (struct bfd_link_info *info) |
| 7509 | { |
| 7510 | struct ppc_link_hash_table *htab; |
| 7511 | bfd *ibfd; |
| 7512 | asection *sec; |
| 7513 | bfd_vma low_vma, high_vma, limit; |
| 7514 | |
| 7515 | htab = ppc_hash_table (info); |
| 7516 | if (htab == NULL) |
| 7517 | return FALSE; |
| 7518 | |
| 7519 | /* A bl insn can reach -0x2000000 to 0x1fffffc. The limit is |
| 7520 | reduced somewhat to cater for possible stubs that might be added |
| 7521 | between the call and its destination. */ |
| 7522 | if (htab->params->group_size < 0) |
| 7523 | { |
| 7524 | limit = -htab->params->group_size; |
| 7525 | if (limit == 1) |
| 7526 | limit = 0x1e00000; |
| 7527 | } |
| 7528 | else |
| 7529 | { |
| 7530 | limit = htab->params->group_size; |
| 7531 | if (limit == 1) |
| 7532 | limit = 0x1c00000; |
| 7533 | } |
| 7534 | |
| 7535 | low_vma = -1; |
| 7536 | high_vma = 0; |
| 7537 | for (sec = info->output_bfd->sections; sec != NULL; sec = sec->next) |
| 7538 | if ((sec->flags & (SEC_ALLOC | SEC_CODE)) == (SEC_ALLOC | SEC_CODE)) |
| 7539 | { |
| 7540 | if (low_vma > sec->vma) |
| 7541 | low_vma = sec->vma; |
| 7542 | if (high_vma < sec->vma + sec->size) |
| 7543 | high_vma = sec->vma + sec->size; |
| 7544 | } |
| 7545 | |
| 7546 | /* If a "bl" can reach anywhere in local code sections, then we can |
| 7547 | convert all inline PLT sequences to direct calls when the symbol |
| 7548 | is local. */ |
| 7549 | if (high_vma - low_vma < limit) |
| 7550 | { |
| 7551 | htab->can_convert_all_inline_plt = 1; |
| 7552 | return TRUE; |
| 7553 | } |
| 7554 | |
| 7555 | /* Otherwise, go looking through relocs for cases where a direct |
| 7556 | call won't reach. Mark the symbol on any such reloc to disable |
| 7557 | the optimization and keep the PLT entry as it seems likely that |
| 7558 | this will be better than creating trampolines. Note that this |
| 7559 | will disable the optimization for all inline PLT calls to a |
| 7560 | particular symbol, not just those that won't reach. The |
| 7561 | difficulty in doing a more precise optimization is that the |
| 7562 | linker needs to make a decision depending on whether a |
| 7563 | particular R_PPC64_PLTCALL insn can be turned into a direct |
| 7564 | call, for each of the R_PPC64_PLTSEQ and R_PPC64_PLT16* insns in |
| 7565 | the sequence, and there is nothing that ties those relocs |
| 7566 | together except their symbol. */ |
| 7567 | |
| 7568 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
| 7569 | { |
| 7570 | Elf_Internal_Shdr *symtab_hdr; |
| 7571 | Elf_Internal_Sym *local_syms; |
| 7572 | |
| 7573 | if (!is_ppc64_elf (ibfd)) |
| 7574 | continue; |
| 7575 | |
| 7576 | local_syms = NULL; |
| 7577 | symtab_hdr = &elf_symtab_hdr (ibfd); |
| 7578 | |
| 7579 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) |
| 7580 | if (ppc64_elf_section_data (sec)->has_pltcall |
| 7581 | && !bfd_is_abs_section (sec->output_section)) |
| 7582 | { |
| 7583 | Elf_Internal_Rela *relstart, *rel, *relend; |
| 7584 | |
| 7585 | /* Read the relocations. */ |
| 7586 | relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, |
| 7587 | info->keep_memory); |
| 7588 | if (relstart == NULL) |
| 7589 | return FALSE; |
| 7590 | |
| 7591 | relend = relstart + sec->reloc_count; |
| 7592 | for (rel = relstart; rel < relend; rel++) |
| 7593 | { |
| 7594 | enum elf_ppc64_reloc_type r_type; |
| 7595 | unsigned long r_symndx; |
| 7596 | asection *sym_sec; |
| 7597 | struct elf_link_hash_entry *h; |
| 7598 | Elf_Internal_Sym *sym; |
| 7599 | unsigned char *tls_maskp; |
| 7600 | |
| 7601 | r_type = ELF64_R_TYPE (rel->r_info); |
| 7602 | if (r_type != R_PPC64_PLTCALL |
| 7603 | && r_type != R_PPC64_PLTCALL_NOTOC) |
| 7604 | continue; |
| 7605 | |
| 7606 | r_symndx = ELF64_R_SYM (rel->r_info); |
| 7607 | if (!get_sym_h (&h, &sym, &sym_sec, &tls_maskp, &local_syms, |
| 7608 | r_symndx, ibfd)) |
| 7609 | { |
| 7610 | if (elf_section_data (sec)->relocs != relstart) |
| 7611 | free (relstart); |
| 7612 | if (symtab_hdr->contents != (bfd_byte *) local_syms) |
| 7613 | free (local_syms); |
| 7614 | return FALSE; |
| 7615 | } |
| 7616 | |
| 7617 | if (sym_sec != NULL && sym_sec->output_section != NULL) |
| 7618 | { |
| 7619 | bfd_vma from, to; |
| 7620 | if (h != NULL) |
| 7621 | to = h->root.u.def.value; |
| 7622 | else |
| 7623 | to = sym->st_value; |
| 7624 | to += (rel->r_addend |
| 7625 | + sym_sec->output_offset |
| 7626 | + sym_sec->output_section->vma); |
| 7627 | from = (rel->r_offset |
| 7628 | + sec->output_offset |
| 7629 | + sec->output_section->vma); |
| 7630 | if (to - from + limit < 2 * limit |
| 7631 | && !(r_type == R_PPC64_PLTCALL_NOTOC |
| 7632 | && (((h ? h->other : sym->st_other) |
| 7633 | & STO_PPC64_LOCAL_MASK) |
| 7634 | > 1 << STO_PPC64_LOCAL_BIT))) |
| 7635 | *tls_maskp &= ~PLT_KEEP; |
| 7636 | } |
| 7637 | } |
| 7638 | if (elf_section_data (sec)->relocs != relstart) |
| 7639 | free (relstart); |
| 7640 | } |
| 7641 | |
| 7642 | if (local_syms != NULL |
| 7643 | && symtab_hdr->contents != (unsigned char *) local_syms) |
| 7644 | { |
| 7645 | if (!info->keep_memory) |
| 7646 | free (local_syms); |
| 7647 | else |
| 7648 | symtab_hdr->contents = (unsigned char *) local_syms; |
| 7649 | } |
| 7650 | } |
| 7651 | |
| 7652 | return TRUE; |
| 7653 | } |
| 7654 | |
| 7655 | /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */ |
| 7656 | |
| 7657 | asection * |
| 7658 | ppc64_elf_tls_setup (struct bfd_link_info *info) |
| 7659 | { |
| 7660 | struct ppc_link_hash_table *htab; |
| 7661 | struct elf_link_hash_entry *tga, *tga_fd, *desc, *desc_fd; |
| 7662 | |
| 7663 | htab = ppc_hash_table (info); |
| 7664 | if (htab == NULL) |
| 7665 | return NULL; |
| 7666 | |
| 7667 | if (abiversion (info->output_bfd) == 1) |
| 7668 | htab->opd_abi = 1; |
| 7669 | |
| 7670 | if (htab->params->no_multi_toc) |
| 7671 | htab->do_multi_toc = 0; |
| 7672 | else if (!htab->do_multi_toc) |
| 7673 | htab->params->no_multi_toc = 1; |
| 7674 | |
| 7675 | /* Default to --no-plt-localentry, as this option can cause problems |
| 7676 | with symbol interposition. For example, glibc libpthread.so and |
| 7677 | libc.so duplicate many pthread symbols, with a fallback |
| 7678 | implementation in libc.so. In some cases the fallback does more |
| 7679 | work than the pthread implementation. __pthread_condattr_destroy |
| 7680 | is one such symbol: the libpthread.so implementation is |
| 7681 | localentry:0 while the libc.so implementation is localentry:8. |
| 7682 | An app that "cleverly" uses dlopen to only load necessary |
| 7683 | libraries at runtime may omit loading libpthread.so when not |
| 7684 | running multi-threaded, which then results in the libc.so |
| 7685 | fallback symbols being used and ld.so complaining. Now there |
| 7686 | are workarounds in ld (see non_zero_localentry) to detect the |
| 7687 | pthread situation, but that may not be the only case where |
| 7688 | --plt-localentry can cause trouble. */ |
| 7689 | if (htab->params->plt_localentry0 < 0) |
| 7690 | htab->params->plt_localentry0 = 0; |
| 7691 | if (htab->params->plt_localentry0 |
| 7692 | && elf_link_hash_lookup (&htab->elf, "GLIBC_2.26", |
| 7693 | FALSE, FALSE, FALSE) == NULL) |
| 7694 | _bfd_error_handler |
| 7695 | (_("warning: --plt-localentry is especially dangerous without " |
| 7696 | "ld.so support to detect ABI violations")); |
| 7697 | |
| 7698 | tga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr", |
| 7699 | FALSE, FALSE, TRUE); |
| 7700 | htab->tls_get_addr = ppc_elf_hash_entry (tga); |
| 7701 | |
| 7702 | /* Move dynamic linking info to the function descriptor sym. */ |
| 7703 | if (tga != NULL) |
| 7704 | func_desc_adjust (tga, info); |
| 7705 | tga_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr", |
| 7706 | FALSE, FALSE, TRUE); |
| 7707 | htab->tls_get_addr_fd = ppc_elf_hash_entry (tga_fd); |
| 7708 | |
| 7709 | desc = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_desc", |
| 7710 | FALSE, FALSE, TRUE); |
| 7711 | htab->tga_desc = ppc_elf_hash_entry (desc); |
| 7712 | if (desc != NULL) |
| 7713 | func_desc_adjust (desc, info); |
| 7714 | desc_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_desc", |
| 7715 | FALSE, FALSE, TRUE); |
| 7716 | htab->tga_desc_fd = ppc_elf_hash_entry (desc_fd); |
| 7717 | |
| 7718 | if (htab->params->tls_get_addr_opt) |
| 7719 | { |
| 7720 | struct elf_link_hash_entry *opt, *opt_fd; |
| 7721 | |
| 7722 | opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt", |
| 7723 | FALSE, FALSE, TRUE); |
| 7724 | if (opt != NULL) |
| 7725 | func_desc_adjust (opt, info); |
| 7726 | opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt", |
| 7727 | FALSE, FALSE, TRUE); |
| 7728 | if (opt_fd != NULL |
| 7729 | && (opt_fd->root.type == bfd_link_hash_defined |
| 7730 | || opt_fd->root.type == bfd_link_hash_defweak)) |
| 7731 | { |
| 7732 | /* If glibc supports an optimized __tls_get_addr call stub, |
| 7733 | signalled by the presence of __tls_get_addr_opt, and we'll |
| 7734 | be calling __tls_get_addr via a plt call stub, then |
| 7735 | make __tls_get_addr point to __tls_get_addr_opt. */ |
| 7736 | if (!(htab->elf.dynamic_sections_created |
| 7737 | && tga_fd != NULL |
| 7738 | && (tga_fd->type == STT_FUNC |
| 7739 | || tga_fd->needs_plt) |
| 7740 | && !(SYMBOL_CALLS_LOCAL (info, tga_fd) |
| 7741 | || UNDEFWEAK_NO_DYNAMIC_RELOC (info, tga_fd)))) |
| 7742 | tga_fd = NULL; |
| 7743 | if (!(htab->elf.dynamic_sections_created |
| 7744 | && desc_fd != NULL |
| 7745 | && (desc_fd->type == STT_FUNC |
| 7746 | || desc_fd->needs_plt) |
| 7747 | && !(SYMBOL_CALLS_LOCAL (info, desc_fd) |
| 7748 | || UNDEFWEAK_NO_DYNAMIC_RELOC (info, desc_fd)))) |
| 7749 | desc_fd = NULL; |
| 7750 | |
| 7751 | if (tga_fd != NULL || desc_fd != NULL) |
| 7752 | { |
| 7753 | struct plt_entry *ent = NULL; |
| 7754 | |
| 7755 | if (tga_fd != NULL) |
| 7756 | for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next) |
| 7757 | if (ent->plt.refcount > 0) |
| 7758 | break; |
| 7759 | if (ent == NULL && desc_fd != NULL) |
| 7760 | for (ent = desc_fd->plt.plist; ent != NULL; ent = ent->next) |
| 7761 | if (ent->plt.refcount > 0) |
| 7762 | break; |
| 7763 | if (ent != NULL) |
| 7764 | { |
| 7765 | if (tga_fd != NULL) |
| 7766 | { |
| 7767 | tga_fd->root.type = bfd_link_hash_indirect; |
| 7768 | tga_fd->root.u.i.link = &opt_fd->root; |
| 7769 | tga_fd->root.u.i.warning = NULL; |
| 7770 | ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd); |
| 7771 | } |
| 7772 | if (desc_fd != NULL) |
| 7773 | { |
| 7774 | desc_fd->root.type = bfd_link_hash_indirect; |
| 7775 | desc_fd->root.u.i.link = &opt_fd->root; |
| 7776 | desc_fd->root.u.i.warning = NULL; |
| 7777 | ppc64_elf_copy_indirect_symbol (info, opt_fd, desc_fd); |
| 7778 | } |
| 7779 | opt_fd->mark = 1; |
| 7780 | if (opt_fd->dynindx != -1) |
| 7781 | { |
| 7782 | /* Use __tls_get_addr_opt in dynamic relocations. */ |
| 7783 | opt_fd->dynindx = -1; |
| 7784 | _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, |
| 7785 | opt_fd->dynstr_index); |
| 7786 | if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd)) |
| 7787 | return NULL; |
| 7788 | } |
| 7789 | if (tga_fd != NULL) |
| 7790 | { |
| 7791 | htab->tls_get_addr_fd = ppc_elf_hash_entry (opt_fd); |
| 7792 | tga = &htab->tls_get_addr->elf; |
| 7793 | if (opt != NULL && tga != NULL) |
| 7794 | { |
| 7795 | tga->root.type = bfd_link_hash_indirect; |
| 7796 | tga->root.u.i.link = &opt->root; |
| 7797 | tga->root.u.i.warning = NULL; |
| 7798 | ppc64_elf_copy_indirect_symbol (info, opt, tga); |
| 7799 | opt->mark = 1; |
| 7800 | _bfd_elf_link_hash_hide_symbol (info, opt, |
| 7801 | tga->forced_local); |
| 7802 | htab->tls_get_addr = ppc_elf_hash_entry (opt); |
| 7803 | } |
| 7804 | htab->tls_get_addr_fd->oh = htab->tls_get_addr; |
| 7805 | htab->tls_get_addr_fd->is_func_descriptor = 1; |
| 7806 | if (htab->tls_get_addr != NULL) |
| 7807 | { |
| 7808 | htab->tls_get_addr->oh = htab->tls_get_addr_fd; |
| 7809 | htab->tls_get_addr->is_func = 1; |
| 7810 | } |
| 7811 | } |
| 7812 | if (desc_fd != NULL) |
| 7813 | { |
| 7814 | htab->tga_desc_fd = ppc_elf_hash_entry (opt_fd); |
| 7815 | if (opt != NULL && desc != NULL) |
| 7816 | { |
| 7817 | desc->root.type = bfd_link_hash_indirect; |
| 7818 | desc->root.u.i.link = &opt->root; |
| 7819 | desc->root.u.i.warning = NULL; |
| 7820 | ppc64_elf_copy_indirect_symbol (info, opt, desc); |
| 7821 | opt->mark = 1; |
| 7822 | _bfd_elf_link_hash_hide_symbol (info, opt, |
| 7823 | desc->forced_local); |
| 7824 | htab->tga_desc = ppc_elf_hash_entry (opt); |
| 7825 | } |
| 7826 | htab->tga_desc_fd->oh = htab->tga_desc; |
| 7827 | htab->tga_desc_fd->is_func_descriptor = 1; |
| 7828 | if (htab->tga_desc != NULL) |
| 7829 | { |
| 7830 | htab->tga_desc->oh = htab->tga_desc_fd; |
| 7831 | htab->tga_desc->is_func = 1; |
| 7832 | } |
| 7833 | } |
| 7834 | } |
| 7835 | } |
| 7836 | } |
| 7837 | else if (htab->params->tls_get_addr_opt < 0) |
| 7838 | htab->params->tls_get_addr_opt = 0; |
| 7839 | } |
| 7840 | |
| 7841 | if (htab->tga_desc_fd != NULL |
| 7842 | && htab->params->tls_get_addr_opt |
| 7843 | && htab->params->no_tls_get_addr_regsave == -1) |
| 7844 | htab->params->no_tls_get_addr_regsave = 0; |
| 7845 | |
| 7846 | return _bfd_elf_tls_setup (info->output_bfd, info); |
| 7847 | } |
| 7848 | |
| 7849 | /* Return TRUE iff REL is a branch reloc with a global symbol matching |
| 7850 | any of HASH1, HASH2, HASH3, or HASH4. */ |
| 7851 | |
| 7852 | static bfd_boolean |
| 7853 | branch_reloc_hash_match (const bfd *ibfd, |
| 7854 | const Elf_Internal_Rela *rel, |
| 7855 | const struct ppc_link_hash_entry *hash1, |
| 7856 | const struct ppc_link_hash_entry *hash2, |
| 7857 | const struct ppc_link_hash_entry *hash3, |
| 7858 | const struct ppc_link_hash_entry *hash4) |
| 7859 | { |
| 7860 | Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd); |
| 7861 | enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info); |
| 7862 | unsigned int r_symndx = ELF64_R_SYM (rel->r_info); |
| 7863 | |
| 7864 | if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type)) |
| 7865 | { |
| 7866 | struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd); |
| 7867 | struct elf_link_hash_entry *h; |
| 7868 | |
| 7869 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 7870 | h = elf_follow_link (h); |
| 7871 | if (h == &hash1->elf || h == &hash2->elf |
| 7872 | || h == &hash3->elf || h == &hash4->elf) |
| 7873 | return TRUE; |
| 7874 | } |
| 7875 | return FALSE; |
| 7876 | } |
| 7877 | |
| 7878 | /* Run through all the TLS relocs looking for optimization |
| 7879 | opportunities. The linker has been hacked (see ppc64elf.em) to do |
| 7880 | a preliminary section layout so that we know the TLS segment |
| 7881 | offsets. We can't optimize earlier because some optimizations need |
| 7882 | to know the tp offset, and we need to optimize before allocating |
| 7883 | dynamic relocations. */ |
| 7884 | |
| 7885 | bfd_boolean |
| 7886 | ppc64_elf_tls_optimize (struct bfd_link_info *info) |
| 7887 | { |
| 7888 | bfd *ibfd; |
| 7889 | asection *sec; |
| 7890 | struct ppc_link_hash_table *htab; |
| 7891 | unsigned char *toc_ref; |
| 7892 | int pass; |
| 7893 | |
| 7894 | if (!bfd_link_executable (info)) |
| 7895 | return TRUE; |
| 7896 | |
| 7897 | htab = ppc_hash_table (info); |
| 7898 | if (htab == NULL) |
| 7899 | return FALSE; |
| 7900 | |
| 7901 | /* Make two passes over the relocs. On the first pass, mark toc |
| 7902 | entries involved with tls relocs, and check that tls relocs |
| 7903 | involved in setting up a tls_get_addr call are indeed followed by |
| 7904 | such a call. If they are not, we can't do any tls optimization. |
| 7905 | On the second pass twiddle tls_mask flags to notify |
| 7906 | relocate_section that optimization can be done, and adjust got |
| 7907 | and plt refcounts. */ |
| 7908 | toc_ref = NULL; |
| 7909 | for (pass = 0; pass < 2; ++pass) |
| 7910 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
| 7911 | { |
| 7912 | Elf_Internal_Sym *locsyms = NULL; |
| 7913 | asection *toc = bfd_get_section_by_name (ibfd, ".toc"); |
| 7914 | |
| 7915 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) |
| 7916 | if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section)) |
| 7917 | { |
| 7918 | Elf_Internal_Rela *relstart, *rel, *relend; |
| 7919 | bfd_boolean found_tls_get_addr_arg = 0; |
| 7920 | |
| 7921 | /* Read the relocations. */ |
| 7922 | relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, |
| 7923 | info->keep_memory); |
| 7924 | if (relstart == NULL) |
| 7925 | { |
| 7926 | free (toc_ref); |
| 7927 | return FALSE; |
| 7928 | } |
| 7929 | |
| 7930 | relend = relstart + sec->reloc_count; |
| 7931 | for (rel = relstart; rel < relend; rel++) |
| 7932 | { |
| 7933 | enum elf_ppc64_reloc_type r_type; |
| 7934 | unsigned long r_symndx; |
| 7935 | struct elf_link_hash_entry *h; |
| 7936 | Elf_Internal_Sym *sym; |
| 7937 | asection *sym_sec; |
| 7938 | unsigned char *tls_mask; |
| 7939 | unsigned int tls_set, tls_clear, tls_type = 0; |
| 7940 | bfd_vma value; |
| 7941 | bfd_boolean ok_tprel, is_local; |
| 7942 | long toc_ref_index = 0; |
| 7943 | int expecting_tls_get_addr = 0; |
| 7944 | bfd_boolean ret = FALSE; |
| 7945 | |
| 7946 | r_symndx = ELF64_R_SYM (rel->r_info); |
| 7947 | if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms, |
| 7948 | r_symndx, ibfd)) |
| 7949 | { |
| 7950 | err_free_rel: |
| 7951 | if (elf_section_data (sec)->relocs != relstart) |
| 7952 | free (relstart); |
| 7953 | free (toc_ref); |
| 7954 | if (elf_symtab_hdr (ibfd).contents |
| 7955 | != (unsigned char *) locsyms) |
| 7956 | free (locsyms); |
| 7957 | return ret; |
| 7958 | } |
| 7959 | |
| 7960 | if (h != NULL) |
| 7961 | { |
| 7962 | if (h->root.type == bfd_link_hash_defined |
| 7963 | || h->root.type == bfd_link_hash_defweak) |
| 7964 | value = h->root.u.def.value; |
| 7965 | else if (h->root.type == bfd_link_hash_undefweak) |
| 7966 | value = 0; |
| 7967 | else |
| 7968 | { |
| 7969 | found_tls_get_addr_arg = 0; |
| 7970 | continue; |
| 7971 | } |
| 7972 | } |
| 7973 | else |
| 7974 | /* Symbols referenced by TLS relocs must be of type |
| 7975 | STT_TLS. So no need for .opd local sym adjust. */ |
| 7976 | value = sym->st_value; |
| 7977 | |
| 7978 | ok_tprel = FALSE; |
| 7979 | is_local = SYMBOL_REFERENCES_LOCAL (info, h); |
| 7980 | if (is_local) |
| 7981 | { |
| 7982 | if (h != NULL |
| 7983 | && h->root.type == bfd_link_hash_undefweak) |
| 7984 | ok_tprel = TRUE; |
| 7985 | else if (sym_sec != NULL |
| 7986 | && sym_sec->output_section != NULL) |
| 7987 | { |
| 7988 | value += sym_sec->output_offset; |
| 7989 | value += sym_sec->output_section->vma; |
| 7990 | value -= htab->elf.tls_sec->vma + TP_OFFSET; |
| 7991 | /* Note that even though the prefix insns |
| 7992 | allow a 1<<33 offset we use the same test |
| 7993 | as for addis;addi. There may be a mix of |
| 7994 | pcrel and non-pcrel code and the decision |
| 7995 | to optimise is per symbol, not per TLS |
| 7996 | sequence. */ |
| 7997 | ok_tprel = value + 0x80008000ULL < 1ULL << 32; |
| 7998 | } |
| 7999 | } |
| 8000 | |
| 8001 | r_type = ELF64_R_TYPE (rel->r_info); |
| 8002 | /* If this section has old-style __tls_get_addr calls |
| 8003 | without marker relocs, then check that each |
| 8004 | __tls_get_addr call reloc is preceded by a reloc |
| 8005 | that conceivably belongs to the __tls_get_addr arg |
| 8006 | setup insn. If we don't find matching arg setup |
| 8007 | relocs, don't do any tls optimization. */ |
| 8008 | if (pass == 0 |
| 8009 | && sec->nomark_tls_get_addr |
| 8010 | && h != NULL |
| 8011 | && is_tls_get_addr (h, htab) |
| 8012 | && !found_tls_get_addr_arg |
| 8013 | && is_branch_reloc (r_type)) |
| 8014 | { |
| 8015 | info->callbacks->minfo (_("%H __tls_get_addr lost arg, " |
| 8016 | "TLS optimization disabled\n"), |
| 8017 | ibfd, sec, rel->r_offset); |
| 8018 | ret = TRUE; |
| 8019 | goto err_free_rel; |
| 8020 | } |
| 8021 | |
| 8022 | found_tls_get_addr_arg = 0; |
| 8023 | switch (r_type) |
| 8024 | { |
| 8025 | case R_PPC64_GOT_TLSLD16: |
| 8026 | case R_PPC64_GOT_TLSLD16_LO: |
| 8027 | case R_PPC64_GOT_TLSLD34: |
| 8028 | expecting_tls_get_addr = 1; |
| 8029 | found_tls_get_addr_arg = 1; |
| 8030 | /* Fall through. */ |
| 8031 | |
| 8032 | case R_PPC64_GOT_TLSLD16_HI: |
| 8033 | case R_PPC64_GOT_TLSLD16_HA: |
| 8034 | /* These relocs should never be against a symbol |
| 8035 | defined in a shared lib. Leave them alone if |
| 8036 | that turns out to be the case. */ |
| 8037 | if (!is_local) |
| 8038 | continue; |
| 8039 | |
| 8040 | /* LD -> LE */ |
| 8041 | tls_set = 0; |
| 8042 | tls_clear = TLS_LD; |
| 8043 | tls_type = TLS_TLS | TLS_LD; |
| 8044 | break; |
| 8045 | |
| 8046 | case R_PPC64_GOT_TLSGD16: |
| 8047 | case R_PPC64_GOT_TLSGD16_LO: |
| 8048 | case R_PPC64_GOT_TLSGD34: |
| 8049 | expecting_tls_get_addr = 1; |
| 8050 | found_tls_get_addr_arg = 1; |
| 8051 | /* Fall through. */ |
| 8052 | |
| 8053 | case R_PPC64_GOT_TLSGD16_HI: |
| 8054 | case R_PPC64_GOT_TLSGD16_HA: |
| 8055 | if (ok_tprel) |
| 8056 | /* GD -> LE */ |
| 8057 | tls_set = 0; |
| 8058 | else |
| 8059 | /* GD -> IE */ |
| 8060 | tls_set = TLS_TLS | TLS_GDIE; |
| 8061 | tls_clear = TLS_GD; |
| 8062 | tls_type = TLS_TLS | TLS_GD; |
| 8063 | break; |
| 8064 | |
| 8065 | case R_PPC64_GOT_TPREL34: |
| 8066 | case R_PPC64_GOT_TPREL16_DS: |
| 8067 | case R_PPC64_GOT_TPREL16_LO_DS: |
| 8068 | case R_PPC64_GOT_TPREL16_HI: |
| 8069 | case R_PPC64_GOT_TPREL16_HA: |
| 8070 | if (ok_tprel) |
| 8071 | { |
| 8072 | /* IE -> LE */ |
| 8073 | tls_set = 0; |
| 8074 | tls_clear = TLS_TPREL; |
| 8075 | tls_type = TLS_TLS | TLS_TPREL; |
| 8076 | break; |
| 8077 | } |
| 8078 | continue; |
| 8079 | |
| 8080 | case R_PPC64_TLSLD: |
| 8081 | if (!is_local) |
| 8082 | continue; |
| 8083 | /* Fall through. */ |
| 8084 | case R_PPC64_TLSGD: |
| 8085 | if (rel + 1 < relend |
| 8086 | && is_plt_seq_reloc (ELF64_R_TYPE (rel[1].r_info))) |
| 8087 | { |
| 8088 | if (pass != 0 |
| 8089 | && (ELF64_R_TYPE (rel[1].r_info) |
| 8090 | != R_PPC64_PLTSEQ) |
| 8091 | && (ELF64_R_TYPE (rel[1].r_info) |
| 8092 | != R_PPC64_PLTSEQ_NOTOC)) |
| 8093 | { |
| 8094 | r_symndx = ELF64_R_SYM (rel[1].r_info); |
| 8095 | if (!get_sym_h (&h, NULL, NULL, NULL, &locsyms, |
| 8096 | r_symndx, ibfd)) |
| 8097 | goto err_free_rel; |
| 8098 | if (h != NULL) |
| 8099 | { |
| 8100 | struct plt_entry *ent = NULL; |
| 8101 | |
| 8102 | for (ent = h->plt.plist; |
| 8103 | ent != NULL; |
| 8104 | ent = ent->next) |
| 8105 | if (ent->addend == rel[1].r_addend) |
| 8106 | break; |
| 8107 | |
| 8108 | if (ent != NULL |
| 8109 | && ent->plt.refcount > 0) |
| 8110 | ent->plt.refcount -= 1; |
| 8111 | } |
| 8112 | } |
| 8113 | continue; |
| 8114 | } |
| 8115 | found_tls_get_addr_arg = 1; |
| 8116 | /* Fall through. */ |
| 8117 | |
| 8118 | case R_PPC64_TLS: |
| 8119 | case R_PPC64_TOC16: |
| 8120 | case R_PPC64_TOC16_LO: |
| 8121 | if (sym_sec == NULL || sym_sec != toc) |
| 8122 | continue; |
| 8123 | |
| 8124 | /* Mark this toc entry as referenced by a TLS |
| 8125 | code sequence. We can do that now in the |
| 8126 | case of R_PPC64_TLS, and after checking for |
| 8127 | tls_get_addr for the TOC16 relocs. */ |
| 8128 | if (toc_ref == NULL) |
| 8129 | toc_ref |
| 8130 | = bfd_zmalloc (toc->output_section->rawsize / 8); |
| 8131 | if (toc_ref == NULL) |
| 8132 | goto err_free_rel; |
| 8133 | |
| 8134 | if (h != NULL) |
| 8135 | value = h->root.u.def.value; |
| 8136 | else |
| 8137 | value = sym->st_value; |
| 8138 | value += rel->r_addend; |
| 8139 | if (value % 8 != 0) |
| 8140 | continue; |
| 8141 | BFD_ASSERT (value < toc->size |
| 8142 | && toc->output_offset % 8 == 0); |
| 8143 | toc_ref_index = (value + toc->output_offset) / 8; |
| 8144 | if (r_type == R_PPC64_TLS |
| 8145 | || r_type == R_PPC64_TLSGD |
| 8146 | || r_type == R_PPC64_TLSLD) |
| 8147 | { |
| 8148 | toc_ref[toc_ref_index] = 1; |
| 8149 | continue; |
| 8150 | } |
| 8151 | |
| 8152 | if (pass != 0 && toc_ref[toc_ref_index] == 0) |
| 8153 | continue; |
| 8154 | |
| 8155 | tls_set = 0; |
| 8156 | tls_clear = 0; |
| 8157 | expecting_tls_get_addr = 2; |
| 8158 | break; |
| 8159 | |
| 8160 | case R_PPC64_TPREL64: |
| 8161 | if (pass == 0 |
| 8162 | || sec != toc |
| 8163 | || toc_ref == NULL |
| 8164 | || !toc_ref[(rel->r_offset + toc->output_offset) / 8]) |
| 8165 | continue; |
| 8166 | if (ok_tprel) |
| 8167 | { |
| 8168 | /* IE -> LE */ |
| 8169 | tls_set = TLS_EXPLICIT; |
| 8170 | tls_clear = TLS_TPREL; |
| 8171 | break; |
| 8172 | } |
| 8173 | continue; |
| 8174 | |
| 8175 | case R_PPC64_DTPMOD64: |
| 8176 | if (pass == 0 |
| 8177 | || sec != toc |
| 8178 | || toc_ref == NULL |
| 8179 | || !toc_ref[(rel->r_offset + toc->output_offset) / 8]) |
| 8180 | continue; |
| 8181 | if (rel + 1 < relend |
| 8182 | && (rel[1].r_info |
| 8183 | == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)) |
| 8184 | && rel[1].r_offset == rel->r_offset + 8) |
| 8185 | { |
| 8186 | if (ok_tprel) |
| 8187 | /* GD -> LE */ |
| 8188 | tls_set = TLS_EXPLICIT | TLS_GD; |
| 8189 | else |
| 8190 | /* GD -> IE */ |
| 8191 | tls_set = TLS_EXPLICIT | TLS_GD | TLS_GDIE; |
| 8192 | tls_clear = TLS_GD; |
| 8193 | } |
| 8194 | else |
| 8195 | { |
| 8196 | if (!is_local) |
| 8197 | continue; |
| 8198 | |
| 8199 | /* LD -> LE */ |
| 8200 | tls_set = TLS_EXPLICIT; |
| 8201 | tls_clear = TLS_LD; |
| 8202 | } |
| 8203 | break; |
| 8204 | |
| 8205 | default: |
| 8206 | continue; |
| 8207 | } |
| 8208 | |
| 8209 | if (pass == 0) |
| 8210 | { |
| 8211 | if (!expecting_tls_get_addr |
| 8212 | || !sec->nomark_tls_get_addr) |
| 8213 | continue; |
| 8214 | |
| 8215 | if (rel + 1 < relend |
| 8216 | && branch_reloc_hash_match (ibfd, rel + 1, |
| 8217 | htab->tls_get_addr_fd, |
| 8218 | htab->tga_desc_fd, |
| 8219 | htab->tls_get_addr, |
| 8220 | htab->tga_desc)) |
| 8221 | { |
| 8222 | if (expecting_tls_get_addr == 2) |
| 8223 | { |
| 8224 | /* Check for toc tls entries. */ |
| 8225 | unsigned char *toc_tls; |
| 8226 | int retval; |
| 8227 | |
| 8228 | retval = get_tls_mask (&toc_tls, NULL, NULL, |
| 8229 | &locsyms, |
| 8230 | rel, ibfd); |
| 8231 | if (retval == 0) |
| 8232 | goto err_free_rel; |
| 8233 | if (toc_tls != NULL) |
| 8234 | { |
| 8235 | if ((*toc_tls & TLS_TLS) != 0 |
| 8236 | && ((*toc_tls & (TLS_GD | TLS_LD)) != 0)) |
| 8237 | found_tls_get_addr_arg = 1; |
| 8238 | if (retval > 1) |
| 8239 | toc_ref[toc_ref_index] = 1; |
| 8240 | } |
| 8241 | } |
| 8242 | continue; |
| 8243 | } |
| 8244 | |
| 8245 | /* Uh oh, we didn't find the expected call. We |
| 8246 | could just mark this symbol to exclude it |
| 8247 | from tls optimization but it's safer to skip |
| 8248 | the entire optimization. */ |
| 8249 | /* xgettext:c-format */ |
| 8250 | info->callbacks->minfo (_("%H arg lost __tls_get_addr, " |
| 8251 | "TLS optimization disabled\n"), |
| 8252 | ibfd, sec, rel->r_offset); |
| 8253 | ret = TRUE; |
| 8254 | goto err_free_rel; |
| 8255 | } |
| 8256 | |
| 8257 | /* If we don't have old-style __tls_get_addr calls |
| 8258 | without TLSGD/TLSLD marker relocs, and we haven't |
| 8259 | found a new-style __tls_get_addr call with a |
| 8260 | marker for this symbol, then we either have a |
| 8261 | broken object file or an -mlongcall style |
| 8262 | indirect call to __tls_get_addr without a marker. |
| 8263 | Disable optimization in this case. */ |
| 8264 | if ((tls_clear & (TLS_GD | TLS_LD)) != 0 |
| 8265 | && (tls_set & TLS_EXPLICIT) == 0 |
| 8266 | && !sec->nomark_tls_get_addr |
| 8267 | && ((*tls_mask & (TLS_TLS | TLS_MARK)) |
| 8268 | != (TLS_TLS | TLS_MARK))) |
| 8269 | continue; |
| 8270 | |
| 8271 | if (expecting_tls_get_addr == 1 + !sec->nomark_tls_get_addr) |
| 8272 | { |
| 8273 | struct plt_entry *ent = NULL; |
| 8274 | |
| 8275 | if (htab->tls_get_addr_fd != NULL) |
| 8276 | for (ent = htab->tls_get_addr_fd->elf.plt.plist; |
| 8277 | ent != NULL; |
| 8278 | ent = ent->next) |
| 8279 | if (ent->addend == 0) |
| 8280 | break; |
| 8281 | |
| 8282 | if (ent == NULL && htab->tga_desc_fd != NULL) |
| 8283 | for (ent = htab->tga_desc_fd->elf.plt.plist; |
| 8284 | ent != NULL; |
| 8285 | ent = ent->next) |
| 8286 | if (ent->addend == 0) |
| 8287 | break; |
| 8288 | |
| 8289 | if (ent == NULL && htab->tls_get_addr != NULL) |
| 8290 | for (ent = htab->tls_get_addr->elf.plt.plist; |
| 8291 | ent != NULL; |
| 8292 | ent = ent->next) |
| 8293 | if (ent->addend == 0) |
| 8294 | break; |
| 8295 | |
| 8296 | if (ent == NULL && htab->tga_desc != NULL) |
| 8297 | for (ent = htab->tga_desc->elf.plt.plist; |
| 8298 | ent != NULL; |
| 8299 | ent = ent->next) |
| 8300 | if (ent->addend == 0) |
| 8301 | break; |
| 8302 | |
| 8303 | if (ent != NULL |
| 8304 | && ent->plt.refcount > 0) |
| 8305 | ent->plt.refcount -= 1; |
| 8306 | } |
| 8307 | |
| 8308 | if (tls_clear == 0) |
| 8309 | continue; |
| 8310 | |
| 8311 | if ((tls_set & TLS_EXPLICIT) == 0) |
| 8312 | { |
| 8313 | struct got_entry *ent; |
| 8314 | |
| 8315 | /* Adjust got entry for this reloc. */ |
| 8316 | if (h != NULL) |
| 8317 | ent = h->got.glist; |
| 8318 | else |
| 8319 | ent = elf_local_got_ents (ibfd)[r_symndx]; |
| 8320 | |
| 8321 | for (; ent != NULL; ent = ent->next) |
| 8322 | if (ent->addend == rel->r_addend |
| 8323 | && ent->owner == ibfd |
| 8324 | && ent->tls_type == tls_type) |
| 8325 | break; |
| 8326 | if (ent == NULL) |
| 8327 | abort (); |
| 8328 | |
| 8329 | if (tls_set == 0) |
| 8330 | { |
| 8331 | /* We managed to get rid of a got entry. */ |
| 8332 | if (ent->got.refcount > 0) |
| 8333 | ent->got.refcount -= 1; |
| 8334 | } |
| 8335 | } |
| 8336 | else |
| 8337 | { |
| 8338 | /* If we got rid of a DTPMOD/DTPREL reloc pair then |
| 8339 | we'll lose one or two dyn relocs. */ |
| 8340 | if (!dec_dynrel_count (rel->r_info, sec, info, |
| 8341 | NULL, h, sym)) |
| 8342 | return FALSE; |
| 8343 | |
| 8344 | if (tls_set == (TLS_EXPLICIT | TLS_GD)) |
| 8345 | { |
| 8346 | if (!dec_dynrel_count ((rel + 1)->r_info, sec, info, |
| 8347 | NULL, h, sym)) |
| 8348 | return FALSE; |
| 8349 | } |
| 8350 | } |
| 8351 | |
| 8352 | *tls_mask |= tls_set & 0xff; |
| 8353 | *tls_mask &= ~tls_clear; |
| 8354 | } |
| 8355 | |
| 8356 | if (elf_section_data (sec)->relocs != relstart) |
| 8357 | free (relstart); |
| 8358 | } |
| 8359 | |
| 8360 | if (locsyms != NULL |
| 8361 | && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms)) |
| 8362 | { |
| 8363 | if (!info->keep_memory) |
| 8364 | free (locsyms); |
| 8365 | else |
| 8366 | elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms; |
| 8367 | } |
| 8368 | } |
| 8369 | |
| 8370 | free (toc_ref); |
| 8371 | htab->do_tls_opt = 1; |
| 8372 | return TRUE; |
| 8373 | } |
| 8374 | |
| 8375 | /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust |
| 8376 | the values of any global symbols in a toc section that has been |
| 8377 | edited. Globals in toc sections should be a rarity, so this function |
| 8378 | sets a flag if any are found in toc sections other than the one just |
| 8379 | edited, so that further hash table traversals can be avoided. */ |
| 8380 | |
| 8381 | struct adjust_toc_info |
| 8382 | { |
| 8383 | asection *toc; |
| 8384 | unsigned long *skip; |
| 8385 | bfd_boolean global_toc_syms; |
| 8386 | }; |
| 8387 | |
| 8388 | enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 }; |
| 8389 | |
| 8390 | static bfd_boolean |
| 8391 | adjust_toc_syms (struct elf_link_hash_entry *h, void *inf) |
| 8392 | { |
| 8393 | struct ppc_link_hash_entry *eh; |
| 8394 | struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf; |
| 8395 | unsigned long i; |
| 8396 | |
| 8397 | if (h->root.type != bfd_link_hash_defined |
| 8398 | && h->root.type != bfd_link_hash_defweak) |
| 8399 | return TRUE; |
| 8400 | |
| 8401 | eh = ppc_elf_hash_entry (h); |
| 8402 | if (eh->adjust_done) |
| 8403 | return TRUE; |
| 8404 | |
| 8405 | if (eh->elf.root.u.def.section == toc_inf->toc) |
| 8406 | { |
| 8407 | if (eh->elf.root.u.def.value > toc_inf->toc->rawsize) |
| 8408 | i = toc_inf->toc->rawsize >> 3; |
| 8409 | else |
| 8410 | i = eh->elf.root.u.def.value >> 3; |
| 8411 | |
| 8412 | if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0) |
| 8413 | { |
| 8414 | _bfd_error_handler |
| 8415 | (_("%s defined on removed toc entry"), eh->elf.root.root.string); |
| 8416 | do |
| 8417 | ++i; |
| 8418 | while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0); |
| 8419 | eh->elf.root.u.def.value = (bfd_vma) i << 3; |
| 8420 | } |
| 8421 | |
| 8422 | eh->elf.root.u.def.value -= toc_inf->skip[i]; |
| 8423 | eh->adjust_done = 1; |
| 8424 | } |
| 8425 | else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0) |
| 8426 | toc_inf->global_toc_syms = TRUE; |
| 8427 | |
| 8428 | return TRUE; |
| 8429 | } |
| 8430 | |
| 8431 | /* Return TRUE iff INSN with a relocation of R_TYPE is one we expect |
| 8432 | on a _LO variety toc/got reloc. */ |
| 8433 | |
| 8434 | static bfd_boolean |
| 8435 | ok_lo_toc_insn (unsigned int insn, enum elf_ppc64_reloc_type r_type) |
| 8436 | { |
| 8437 | return ((insn & (0x3fu << 26)) == 12u << 26 /* addic */ |
| 8438 | || (insn & (0x3fu << 26)) == 14u << 26 /* addi */ |
| 8439 | || (insn & (0x3fu << 26)) == 32u << 26 /* lwz */ |
| 8440 | || (insn & (0x3fu << 26)) == 34u << 26 /* lbz */ |
| 8441 | || (insn & (0x3fu << 26)) == 36u << 26 /* stw */ |
| 8442 | || (insn & (0x3fu << 26)) == 38u << 26 /* stb */ |
| 8443 | || (insn & (0x3fu << 26)) == 40u << 26 /* lhz */ |
| 8444 | || (insn & (0x3fu << 26)) == 42u << 26 /* lha */ |
| 8445 | || (insn & (0x3fu << 26)) == 44u << 26 /* sth */ |
| 8446 | || (insn & (0x3fu << 26)) == 46u << 26 /* lmw */ |
| 8447 | || (insn & (0x3fu << 26)) == 47u << 26 /* stmw */ |
| 8448 | || (insn & (0x3fu << 26)) == 48u << 26 /* lfs */ |
| 8449 | || (insn & (0x3fu << 26)) == 50u << 26 /* lfd */ |
| 8450 | || (insn & (0x3fu << 26)) == 52u << 26 /* stfs */ |
| 8451 | || (insn & (0x3fu << 26)) == 54u << 26 /* stfd */ |
| 8452 | || (insn & (0x3fu << 26)) == 56u << 26 /* lq,lfq */ |
| 8453 | || ((insn & (0x3fu << 26)) == 57u << 26 /* lxsd,lxssp,lfdp */ |
| 8454 | /* Exclude lfqu by testing reloc. If relocs are ever |
| 8455 | defined for the reduced D field in psq_lu then those |
| 8456 | will need testing too. */ |
| 8457 | && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO) |
| 8458 | || ((insn & (0x3fu << 26)) == 58u << 26 /* ld,lwa */ |
| 8459 | && (insn & 1) == 0) |
| 8460 | || (insn & (0x3fu << 26)) == 60u << 26 /* stfq */ |
| 8461 | || ((insn & (0x3fu << 26)) == 61u << 26 /* lxv,stx{v,sd,ssp},stfdp */ |
| 8462 | /* Exclude stfqu. psq_stu as above for psq_lu. */ |
| 8463 | && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO) |
| 8464 | || ((insn & (0x3fu << 26)) == 62u << 26 /* std,stq */ |
| 8465 | && (insn & 1) == 0)); |
| 8466 | } |
| 8467 | |
| 8468 | /* PCREL_OPT in one instance flags to the linker that a pair of insns: |
| 8469 | pld ra,symbol@got@pcrel |
| 8470 | load/store rt,off(ra) |
| 8471 | or |
| 8472 | pla ra,symbol@pcrel |
| 8473 | load/store rt,off(ra) |
| 8474 | may be translated to |
| 8475 | pload/pstore rt,symbol+off@pcrel |
| 8476 | nop. |
| 8477 | This function returns true if the optimization is possible, placing |
| 8478 | the prefix insn in *PINSN1, a NOP in *PINSN2 and the offset in *POFF. |
| 8479 | |
| 8480 | On entry to this function, the linker has already determined that |
| 8481 | the pld can be replaced with pla: *PINSN1 is that pla insn, |
| 8482 | while *PINSN2 is the second instruction. */ |
| 8483 | |
| 8484 | static bfd_boolean |
| 8485 | xlate_pcrel_opt (uint64_t *pinsn1, uint64_t *pinsn2, bfd_signed_vma *poff) |
| 8486 | { |
| 8487 | uint64_t insn1 = *pinsn1; |
| 8488 | uint64_t insn2 = *pinsn2; |
| 8489 | bfd_signed_vma off; |
| 8490 | |
| 8491 | if ((insn2 & (63ULL << 58)) == 1ULL << 58) |
| 8492 | { |
| 8493 | /* Check that regs match. */ |
| 8494 | if (((insn2 >> 16) & 31) != ((insn1 >> 21) & 31)) |
| 8495 | return FALSE; |
| 8496 | |
| 8497 | /* P8LS or PMLS form, non-pcrel. */ |
| 8498 | if ((insn2 & (-1ULL << 50) & ~(1ULL << 56)) != (1ULL << 58)) |
| 8499 | return FALSE; |
| 8500 | |
| 8501 | *pinsn1 = (insn2 & ~(31 << 16) & ~0x3ffff0000ffffULL) | (1ULL << 52); |
| 8502 | *pinsn2 = PNOP; |
| 8503 | off = ((insn2 >> 16) & 0x3ffff0000ULL) | (insn2 & 0xffff); |
| 8504 | *poff = (off ^ 0x200000000ULL) - 0x200000000ULL; |
| 8505 | return TRUE; |
| 8506 | } |
| 8507 | |
| 8508 | insn2 >>= 32; |
| 8509 | |
| 8510 | /* Check that regs match. */ |
| 8511 | if (((insn2 >> 16) & 31) != ((insn1 >> 21) & 31)) |
| 8512 | return FALSE; |
| 8513 | |
| 8514 | switch ((insn2 >> 26) & 63) |
| 8515 | { |
| 8516 | default: |
| 8517 | return FALSE; |
| 8518 | |
| 8519 | case 32: /* lwz */ |
| 8520 | case 34: /* lbz */ |
| 8521 | case 36: /* stw */ |
| 8522 | case 38: /* stb */ |
| 8523 | case 40: /* lhz */ |
| 8524 | case 42: /* lha */ |
| 8525 | case 44: /* sth */ |
| 8526 | case 48: /* lfs */ |
| 8527 | case 50: /* lfd */ |
| 8528 | case 52: /* stfs */ |
| 8529 | case 54: /* stfd */ |
| 8530 | /* These are the PMLS cases, where we just need to tack a prefix |
| 8531 | on the insn. */ |
| 8532 | insn1 = ((1ULL << 58) | (2ULL << 56) | (1ULL << 52) |
| 8533 | | (insn2 & ((63ULL << 26) | (31ULL << 21)))); |
| 8534 | off = insn2 & 0xffff; |
| 8535 | break; |
| 8536 | |
| 8537 | case 58: /* lwa, ld */ |
| 8538 | if ((insn2 & 1) != 0) |
| 8539 | return FALSE; |
| 8540 | insn1 = ((1ULL << 58) | (1ULL << 52) |
| 8541 | | (insn2 & 2 ? 41ULL << 26 : 57ULL << 26) |
| 8542 | | (insn2 & (31ULL << 21))); |
| 8543 | off = insn2 & 0xfffc; |
| 8544 | break; |
| 8545 | |
| 8546 | case 57: /* lxsd, lxssp */ |
| 8547 | if ((insn2 & 3) < 2) |
| 8548 | return FALSE; |
| 8549 | insn1 = ((1ULL << 58) | (1ULL << 52) |
| 8550 | | ((40ULL | (insn2 & 3)) << 26) |
| 8551 | | (insn2 & (31ULL << 21))); |
| 8552 | off = insn2 & 0xfffc; |
| 8553 | break; |
| 8554 | |
| 8555 | case 61: /* stxsd, stxssp, lxv, stxv */ |
| 8556 | if ((insn2 & 3) == 0) |
| 8557 | return FALSE; |
| 8558 | else if ((insn2 & 3) >= 2) |
| 8559 | { |
| 8560 | insn1 = ((1ULL << 58) | (1ULL << 52) |
| 8561 | | ((44ULL | (insn2 & 3)) << 26) |
| 8562 | | (insn2 & (31ULL << 21))); |
| 8563 | off = insn2 & 0xfffc; |
| 8564 | } |
| 8565 | else |
| 8566 | { |
| 8567 | insn1 = ((1ULL << 58) | (1ULL << 52) |
| 8568 | | ((50ULL | (insn2 & 4) | ((insn2 & 8) >> 3)) << 26) |
| 8569 | | (insn2 & (31ULL << 21))); |
| 8570 | off = insn2 & 0xfff0; |
| 8571 | } |
| 8572 | break; |
| 8573 | |
| 8574 | case 56: /* lq */ |
| 8575 | insn1 = ((1ULL << 58) | (1ULL << 52) |
| 8576 | | (insn2 & ((63ULL << 26) | (31ULL << 21)))); |
| 8577 | off = insn2 & 0xffff; |
| 8578 | break; |
| 8579 | |
| 8580 | case 6: /* lxvp, stxvp */ |
| 8581 | if ((insn2 & 0xe) != 0) |
| 8582 | return FALSE; |
| 8583 | insn1 = ((1ULL << 58) | (1ULL << 52) |
| 8584 | | ((insn2 & 1) == 0 ? 58ULL << 26 : 62ULL << 26) |
| 8585 | | (insn2 & (31ULL << 21))); |
| 8586 | off = insn2 & 0xfff0; |
| 8587 | break; |
| 8588 | |
| 8589 | case 62: /* std, stq */ |
| 8590 | if ((insn2 & 1) != 0) |
| 8591 | return FALSE; |
| 8592 | insn1 = ((1ULL << 58) | (1ULL << 52) |
| 8593 | | ((insn2 & 2) == 0 ? 61ULL << 26 : 60ULL << 26) |
| 8594 | | (insn2 & (31ULL << 21))); |
| 8595 | off = insn2 & 0xfffc; |
| 8596 | break; |
| 8597 | } |
| 8598 | |
| 8599 | *pinsn1 = insn1; |
| 8600 | *pinsn2 = (uint64_t) NOP << 32; |
| 8601 | *poff = (off ^ 0x8000) - 0x8000; |
| 8602 | return TRUE; |
| 8603 | } |
| 8604 | |
| 8605 | /* Examine all relocs referencing .toc sections in order to remove |
| 8606 | unused .toc entries. */ |
| 8607 | |
| 8608 | bfd_boolean |
| 8609 | ppc64_elf_edit_toc (struct bfd_link_info *info) |
| 8610 | { |
| 8611 | bfd *ibfd; |
| 8612 | struct adjust_toc_info toc_inf; |
| 8613 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
| 8614 | |
| 8615 | htab->do_toc_opt = 1; |
| 8616 | toc_inf.global_toc_syms = TRUE; |
| 8617 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
| 8618 | { |
| 8619 | asection *toc, *sec; |
| 8620 | Elf_Internal_Shdr *symtab_hdr; |
| 8621 | Elf_Internal_Sym *local_syms; |
| 8622 | Elf_Internal_Rela *relstart, *rel, *toc_relocs; |
| 8623 | unsigned long *skip, *drop; |
| 8624 | unsigned char *used; |
| 8625 | unsigned char *keep, last, some_unused; |
| 8626 | |
| 8627 | if (!is_ppc64_elf (ibfd)) |
| 8628 | continue; |
| 8629 | |
| 8630 | toc = bfd_get_section_by_name (ibfd, ".toc"); |
| 8631 | if (toc == NULL |
| 8632 | || toc->size == 0 |
| 8633 | || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS |
| 8634 | || discarded_section (toc)) |
| 8635 | continue; |
| 8636 | |
| 8637 | toc_relocs = NULL; |
| 8638 | local_syms = NULL; |
| 8639 | symtab_hdr = &elf_symtab_hdr (ibfd); |
| 8640 | |
| 8641 | /* Look at sections dropped from the final link. */ |
| 8642 | skip = NULL; |
| 8643 | relstart = NULL; |
| 8644 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) |
| 8645 | { |
| 8646 | if (sec->reloc_count == 0 |
| 8647 | || !discarded_section (sec) |
| 8648 | || get_opd_info (sec) |
| 8649 | || (sec->flags & SEC_ALLOC) == 0 |
| 8650 | || (sec->flags & SEC_DEBUGGING) != 0) |
| 8651 | continue; |
| 8652 | |
| 8653 | relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, FALSE); |
| 8654 | if (relstart == NULL) |
| 8655 | goto error_ret; |
| 8656 | |
| 8657 | /* Run through the relocs to see which toc entries might be |
| 8658 | unused. */ |
| 8659 | for (rel = relstart; rel < relstart + sec->reloc_count; ++rel) |
| 8660 | { |
| 8661 | enum elf_ppc64_reloc_type r_type; |
| 8662 | unsigned long r_symndx; |
| 8663 | asection *sym_sec; |
| 8664 | struct elf_link_hash_entry *h; |
| 8665 | Elf_Internal_Sym *sym; |
| 8666 | bfd_vma val; |
| 8667 | |
| 8668 | r_type = ELF64_R_TYPE (rel->r_info); |
| 8669 | switch (r_type) |
| 8670 | { |
| 8671 | default: |
| 8672 | continue; |
| 8673 | |
| 8674 | case R_PPC64_TOC16: |
| 8675 | case R_PPC64_TOC16_LO: |
| 8676 | case R_PPC64_TOC16_HI: |
| 8677 | case R_PPC64_TOC16_HA: |
| 8678 | case R_PPC64_TOC16_DS: |
| 8679 | case R_PPC64_TOC16_LO_DS: |
| 8680 | break; |
| 8681 | } |
| 8682 | |
| 8683 | r_symndx = ELF64_R_SYM (rel->r_info); |
| 8684 | if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, |
| 8685 | r_symndx, ibfd)) |
| 8686 | goto error_ret; |
| 8687 | |
| 8688 | if (sym_sec != toc) |
| 8689 | continue; |
| 8690 | |
| 8691 | if (h != NULL) |
| 8692 | val = h->root.u.def.value; |
| 8693 | else |
| 8694 | val = sym->st_value; |
| 8695 | val += rel->r_addend; |
| 8696 | |
| 8697 | if (val >= toc->size) |
| 8698 | continue; |
| 8699 | |
| 8700 | /* Anything in the toc ought to be aligned to 8 bytes. |
| 8701 | If not, don't mark as unused. */ |
| 8702 | if (val & 7) |
| 8703 | continue; |
| 8704 | |
| 8705 | if (skip == NULL) |
| 8706 | { |
| 8707 | skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8); |
| 8708 | if (skip == NULL) |
| 8709 | goto error_ret; |
| 8710 | } |
| 8711 | |
| 8712 | skip[val >> 3] = ref_from_discarded; |
| 8713 | } |
| 8714 | |
| 8715 | if (elf_section_data (sec)->relocs != relstart) |
| 8716 | free (relstart); |
| 8717 | } |
| 8718 | |
| 8719 | /* For largetoc loads of address constants, we can convert |
| 8720 | . addis rx,2,addr@got@ha |
| 8721 | . ld ry,addr@got@l(rx) |
| 8722 | to |
| 8723 | . addis rx,2,addr@toc@ha |
| 8724 | . addi ry,rx,addr@toc@l |
| 8725 | when addr is within 2G of the toc pointer. This then means |
| 8726 | that the word storing "addr" in the toc is no longer needed. */ |
| 8727 | |
| 8728 | if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc |
| 8729 | && toc->output_section->rawsize < (bfd_vma) 1 << 31 |
| 8730 | && toc->reloc_count != 0) |
| 8731 | { |
| 8732 | /* Read toc relocs. */ |
| 8733 | toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL, |
| 8734 | info->keep_memory); |
| 8735 | if (toc_relocs == NULL) |
| 8736 | goto error_ret; |
| 8737 | |
| 8738 | for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel) |
| 8739 | { |
| 8740 | enum elf_ppc64_reloc_type r_type; |
| 8741 | unsigned long r_symndx; |
| 8742 | asection *sym_sec; |
| 8743 | struct elf_link_hash_entry *h; |
| 8744 | Elf_Internal_Sym *sym; |
| 8745 | bfd_vma val, addr; |
| 8746 | |
| 8747 | r_type = ELF64_R_TYPE (rel->r_info); |
| 8748 | if (r_type != R_PPC64_ADDR64) |
| 8749 | continue; |
| 8750 | |
| 8751 | r_symndx = ELF64_R_SYM (rel->r_info); |
| 8752 | if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, |
| 8753 | r_symndx, ibfd)) |
| 8754 | goto error_ret; |
| 8755 | |
| 8756 | if (sym_sec == NULL |
| 8757 | || sym_sec->output_section == NULL |
| 8758 | || discarded_section (sym_sec)) |
| 8759 | continue; |
| 8760 | |
| 8761 | if (!SYMBOL_REFERENCES_LOCAL (info, h)) |
| 8762 | continue; |
| 8763 | |
| 8764 | if (h != NULL) |
| 8765 | { |
| 8766 | if (h->type == STT_GNU_IFUNC) |
| 8767 | continue; |
| 8768 | val = h->root.u.def.value; |
| 8769 | } |
| 8770 | else |
| 8771 | { |
| 8772 | if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
| 8773 | continue; |
| 8774 | val = sym->st_value; |
| 8775 | } |
| 8776 | val += rel->r_addend; |
| 8777 | val += sym_sec->output_section->vma + sym_sec->output_offset; |
| 8778 | |
| 8779 | /* We don't yet know the exact toc pointer value, but we |
| 8780 | know it will be somewhere in the toc section. Don't |
| 8781 | optimize if the difference from any possible toc |
| 8782 | pointer is outside [ff..f80008000, 7fff7fff]. */ |
| 8783 | addr = toc->output_section->vma + TOC_BASE_OFF; |
| 8784 | if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32) |
| 8785 | continue; |
| 8786 | |
| 8787 | addr = toc->output_section->vma + toc->output_section->rawsize; |
| 8788 | if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32) |
| 8789 | continue; |
| 8790 | |
| 8791 | if (skip == NULL) |
| 8792 | { |
| 8793 | skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8); |
| 8794 | if (skip == NULL) |
| 8795 | goto error_ret; |
| 8796 | } |
| 8797 | |
| 8798 | skip[rel->r_offset >> 3] |
| 8799 | |= can_optimize | ((rel - toc_relocs) << 2); |
| 8800 | } |
| 8801 | } |
| 8802 | |
| 8803 | if (skip == NULL) |
| 8804 | continue; |
| 8805 | |
| 8806 | used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8); |
| 8807 | if (used == NULL) |
| 8808 | { |
| 8809 | error_ret: |
| 8810 | if (symtab_hdr->contents != (unsigned char *) local_syms) |
| 8811 | free (local_syms); |
| 8812 | if (sec != NULL |
| 8813 | && elf_section_data (sec)->relocs != relstart) |
| 8814 | free (relstart); |
| 8815 | if (elf_section_data (toc)->relocs != toc_relocs) |
| 8816 | free (toc_relocs); |
| 8817 | free (skip); |
| 8818 | return FALSE; |
| 8819 | } |
| 8820 | |
| 8821 | /* Now check all kept sections that might reference the toc. |
| 8822 | Check the toc itself last. */ |
| 8823 | for (sec = (ibfd->sections == toc && toc->next ? toc->next |
| 8824 | : ibfd->sections); |
| 8825 | sec != NULL; |
| 8826 | sec = (sec == toc ? NULL |
| 8827 | : sec->next == NULL ? toc |
| 8828 | : sec->next == toc && toc->next ? toc->next |
| 8829 | : sec->next)) |
| 8830 | { |
| 8831 | int repeat; |
| 8832 | |
| 8833 | if (sec->reloc_count == 0 |
| 8834 | || discarded_section (sec) |
| 8835 | || get_opd_info (sec) |
| 8836 | || (sec->flags & SEC_ALLOC) == 0 |
| 8837 | || (sec->flags & SEC_DEBUGGING) != 0) |
| 8838 | continue; |
| 8839 | |
| 8840 | relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, |
| 8841 | info->keep_memory); |
| 8842 | if (relstart == NULL) |
| 8843 | { |
| 8844 | free (used); |
| 8845 | goto error_ret; |
| 8846 | } |
| 8847 | |
| 8848 | /* Mark toc entries referenced as used. */ |
| 8849 | do |
| 8850 | { |
| 8851 | repeat = 0; |
| 8852 | for (rel = relstart; rel < relstart + sec->reloc_count; ++rel) |
| 8853 | { |
| 8854 | enum elf_ppc64_reloc_type r_type; |
| 8855 | unsigned long r_symndx; |
| 8856 | asection *sym_sec; |
| 8857 | struct elf_link_hash_entry *h; |
| 8858 | Elf_Internal_Sym *sym; |
| 8859 | bfd_vma val; |
| 8860 | |
| 8861 | r_type = ELF64_R_TYPE (rel->r_info); |
| 8862 | switch (r_type) |
| 8863 | { |
| 8864 | case R_PPC64_TOC16: |
| 8865 | case R_PPC64_TOC16_LO: |
| 8866 | case R_PPC64_TOC16_HI: |
| 8867 | case R_PPC64_TOC16_HA: |
| 8868 | case R_PPC64_TOC16_DS: |
| 8869 | case R_PPC64_TOC16_LO_DS: |
| 8870 | /* In case we're taking addresses of toc entries. */ |
| 8871 | case R_PPC64_ADDR64: |
| 8872 | break; |
| 8873 | |
| 8874 | default: |
| 8875 | continue; |
| 8876 | } |
| 8877 | |
| 8878 | r_symndx = ELF64_R_SYM (rel->r_info); |
| 8879 | if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, |
| 8880 | r_symndx, ibfd)) |
| 8881 | { |
| 8882 | free (used); |
| 8883 | goto error_ret; |
| 8884 | } |
| 8885 | |
| 8886 | if (sym_sec != toc) |
| 8887 | continue; |
| 8888 | |
| 8889 | if (h != NULL) |
| 8890 | val = h->root.u.def.value; |
| 8891 | else |
| 8892 | val = sym->st_value; |
| 8893 | val += rel->r_addend; |
| 8894 | |
| 8895 | if (val >= toc->size) |
| 8896 | continue; |
| 8897 | |
| 8898 | if ((skip[val >> 3] & can_optimize) != 0) |
| 8899 | { |
| 8900 | bfd_vma off; |
| 8901 | unsigned char opc; |
| 8902 | |
| 8903 | switch (r_type) |
| 8904 | { |
| 8905 | case R_PPC64_TOC16_HA: |
| 8906 | break; |
| 8907 | |
| 8908 | case R_PPC64_TOC16_LO_DS: |
| 8909 | off = rel->r_offset; |
| 8910 | off += (bfd_big_endian (ibfd) ? -2 : 3); |
| 8911 | if (!bfd_get_section_contents (ibfd, sec, &opc, |
| 8912 | off, 1)) |
| 8913 | { |
| 8914 | free (used); |
| 8915 | goto error_ret; |
| 8916 | } |
| 8917 | if ((opc & (0x3f << 2)) == (58u << 2)) |
| 8918 | break; |
| 8919 | /* Fall through. */ |
| 8920 | |
| 8921 | default: |
| 8922 | /* Wrong sort of reloc, or not a ld. We may |
| 8923 | as well clear ref_from_discarded too. */ |
| 8924 | skip[val >> 3] = 0; |
| 8925 | } |
| 8926 | } |
| 8927 | |
| 8928 | if (sec != toc) |
| 8929 | used[val >> 3] = 1; |
| 8930 | /* For the toc section, we only mark as used if this |
| 8931 | entry itself isn't unused. */ |
| 8932 | else if ((used[rel->r_offset >> 3] |
| 8933 | || !(skip[rel->r_offset >> 3] & ref_from_discarded)) |
| 8934 | && !used[val >> 3]) |
| 8935 | { |
| 8936 | /* Do all the relocs again, to catch reference |
| 8937 | chains. */ |
| 8938 | repeat = 1; |
| 8939 | used[val >> 3] = 1; |
| 8940 | } |
| 8941 | } |
| 8942 | } |
| 8943 | while (repeat); |
| 8944 | |
| 8945 | if (elf_section_data (sec)->relocs != relstart) |
| 8946 | free (relstart); |
| 8947 | } |
| 8948 | |
| 8949 | /* Merge the used and skip arrays. Assume that TOC |
| 8950 | doublewords not appearing as either used or unused belong |
| 8951 | to an entry more than one doubleword in size. */ |
| 8952 | for (drop = skip, keep = used, last = 0, some_unused = 0; |
| 8953 | drop < skip + (toc->size + 7) / 8; |
| 8954 | ++drop, ++keep) |
| 8955 | { |
| 8956 | if (*keep) |
| 8957 | { |
| 8958 | *drop &= ~ref_from_discarded; |
| 8959 | if ((*drop & can_optimize) != 0) |
| 8960 | some_unused = 1; |
| 8961 | last = 0; |
| 8962 | } |
| 8963 | else if ((*drop & ref_from_discarded) != 0) |
| 8964 | { |
| 8965 | some_unused = 1; |
| 8966 | last = ref_from_discarded; |
| 8967 | } |
| 8968 | else |
| 8969 | *drop = last; |
| 8970 | } |
| 8971 | |
| 8972 | free (used); |
| 8973 | |
| 8974 | if (some_unused) |
| 8975 | { |
| 8976 | bfd_byte *contents, *src; |
| 8977 | unsigned long off; |
| 8978 | Elf_Internal_Sym *sym; |
| 8979 | bfd_boolean local_toc_syms = FALSE; |
| 8980 | |
| 8981 | /* Shuffle the toc contents, and at the same time convert the |
| 8982 | skip array from booleans into offsets. */ |
| 8983 | if (!bfd_malloc_and_get_section (ibfd, toc, &contents)) |
| 8984 | goto error_ret; |
| 8985 | |
| 8986 | elf_section_data (toc)->this_hdr.contents = contents; |
| 8987 | |
| 8988 | for (src = contents, off = 0, drop = skip; |
| 8989 | src < contents + toc->size; |
| 8990 | src += 8, ++drop) |
| 8991 | { |
| 8992 | if ((*drop & (can_optimize | ref_from_discarded)) != 0) |
| 8993 | off += 8; |
| 8994 | else if (off != 0) |
| 8995 | { |
| 8996 | *drop = off; |
| 8997 | memcpy (src - off, src, 8); |
| 8998 | } |
| 8999 | } |
| 9000 | *drop = off; |
| 9001 | toc->rawsize = toc->size; |
| 9002 | toc->size = src - contents - off; |
| 9003 | |
| 9004 | /* Adjust addends for relocs against the toc section sym, |
| 9005 | and optimize any accesses we can. */ |
| 9006 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) |
| 9007 | { |
| 9008 | if (sec->reloc_count == 0 |
| 9009 | || discarded_section (sec)) |
| 9010 | continue; |
| 9011 | |
| 9012 | relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, |
| 9013 | info->keep_memory); |
| 9014 | if (relstart == NULL) |
| 9015 | goto error_ret; |
| 9016 | |
| 9017 | for (rel = relstart; rel < relstart + sec->reloc_count; ++rel) |
| 9018 | { |
| 9019 | enum elf_ppc64_reloc_type r_type; |
| 9020 | unsigned long r_symndx; |
| 9021 | asection *sym_sec; |
| 9022 | struct elf_link_hash_entry *h; |
| 9023 | bfd_vma val; |
| 9024 | |
| 9025 | r_type = ELF64_R_TYPE (rel->r_info); |
| 9026 | switch (r_type) |
| 9027 | { |
| 9028 | default: |
| 9029 | continue; |
| 9030 | |
| 9031 | case R_PPC64_TOC16: |
| 9032 | case R_PPC64_TOC16_LO: |
| 9033 | case R_PPC64_TOC16_HI: |
| 9034 | case R_PPC64_TOC16_HA: |
| 9035 | case R_PPC64_TOC16_DS: |
| 9036 | case R_PPC64_TOC16_LO_DS: |
| 9037 | case R_PPC64_ADDR64: |
| 9038 | break; |
| 9039 | } |
| 9040 | |
| 9041 | r_symndx = ELF64_R_SYM (rel->r_info); |
| 9042 | if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, |
| 9043 | r_symndx, ibfd)) |
| 9044 | goto error_ret; |
| 9045 | |
| 9046 | if (sym_sec != toc) |
| 9047 | continue; |
| 9048 | |
| 9049 | if (h != NULL) |
| 9050 | val = h->root.u.def.value; |
| 9051 | else |
| 9052 | { |
| 9053 | val = sym->st_value; |
| 9054 | if (val != 0) |
| 9055 | local_toc_syms = TRUE; |
| 9056 | } |
| 9057 | |
| 9058 | val += rel->r_addend; |
| 9059 | |
| 9060 | if (val > toc->rawsize) |
| 9061 | val = toc->rawsize; |
| 9062 | else if ((skip[val >> 3] & ref_from_discarded) != 0) |
| 9063 | continue; |
| 9064 | else if ((skip[val >> 3] & can_optimize) != 0) |
| 9065 | { |
| 9066 | Elf_Internal_Rela *tocrel |
| 9067 | = toc_relocs + (skip[val >> 3] >> 2); |
| 9068 | unsigned long tsym = ELF64_R_SYM (tocrel->r_info); |
| 9069 | |
| 9070 | switch (r_type) |
| 9071 | { |
| 9072 | case R_PPC64_TOC16_HA: |
| 9073 | rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA); |
| 9074 | break; |
| 9075 | |
| 9076 | case R_PPC64_TOC16_LO_DS: |
| 9077 | rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT); |
| 9078 | break; |
| 9079 | |
| 9080 | default: |
| 9081 | if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) |
| 9082 | ppc_howto_init (); |
| 9083 | info->callbacks->einfo |
| 9084 | /* xgettext:c-format */ |
| 9085 | (_("%H: %s references " |
| 9086 | "optimized away TOC entry\n"), |
| 9087 | ibfd, sec, rel->r_offset, |
| 9088 | ppc64_elf_howto_table[r_type]->name); |
| 9089 | bfd_set_error (bfd_error_bad_value); |
| 9090 | goto error_ret; |
| 9091 | } |
| 9092 | rel->r_addend = tocrel->r_addend; |
| 9093 | elf_section_data (sec)->relocs = relstart; |
| 9094 | continue; |
| 9095 | } |
| 9096 | |
| 9097 | if (h != NULL || sym->st_value != 0) |
| 9098 | continue; |
| 9099 | |
| 9100 | rel->r_addend -= skip[val >> 3]; |
| 9101 | elf_section_data (sec)->relocs = relstart; |
| 9102 | } |
| 9103 | |
| 9104 | if (elf_section_data (sec)->relocs != relstart) |
| 9105 | free (relstart); |
| 9106 | } |
| 9107 | |
| 9108 | /* We shouldn't have local or global symbols defined in the TOC, |
| 9109 | but handle them anyway. */ |
| 9110 | if (local_syms != NULL) |
| 9111 | for (sym = local_syms; |
| 9112 | sym < local_syms + symtab_hdr->sh_info; |
| 9113 | ++sym) |
| 9114 | if (sym->st_value != 0 |
| 9115 | && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc) |
| 9116 | { |
| 9117 | unsigned long i; |
| 9118 | |
| 9119 | if (sym->st_value > toc->rawsize) |
| 9120 | i = toc->rawsize >> 3; |
| 9121 | else |
| 9122 | i = sym->st_value >> 3; |
| 9123 | |
| 9124 | if ((skip[i] & (ref_from_discarded | can_optimize)) != 0) |
| 9125 | { |
| 9126 | if (local_toc_syms) |
| 9127 | _bfd_error_handler |
| 9128 | (_("%s defined on removed toc entry"), |
| 9129 | bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL)); |
| 9130 | do |
| 9131 | ++i; |
| 9132 | while ((skip[i] & (ref_from_discarded | can_optimize))); |
| 9133 | sym->st_value = (bfd_vma) i << 3; |
| 9134 | } |
| 9135 | |
| 9136 | sym->st_value -= skip[i]; |
| 9137 | symtab_hdr->contents = (unsigned char *) local_syms; |
| 9138 | } |
| 9139 | |
| 9140 | /* Adjust any global syms defined in this toc input section. */ |
| 9141 | if (toc_inf.global_toc_syms) |
| 9142 | { |
| 9143 | toc_inf.toc = toc; |
| 9144 | toc_inf.skip = skip; |
| 9145 | toc_inf.global_toc_syms = FALSE; |
| 9146 | elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms, |
| 9147 | &toc_inf); |
| 9148 | } |
| 9149 | |
| 9150 | if (toc->reloc_count != 0) |
| 9151 | { |
| 9152 | Elf_Internal_Shdr *rel_hdr; |
| 9153 | Elf_Internal_Rela *wrel; |
| 9154 | bfd_size_type sz; |
| 9155 | |
| 9156 | /* Remove unused toc relocs, and adjust those we keep. */ |
| 9157 | if (toc_relocs == NULL) |
| 9158 | toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL, |
| 9159 | info->keep_memory); |
| 9160 | if (toc_relocs == NULL) |
| 9161 | goto error_ret; |
| 9162 | |
| 9163 | wrel = toc_relocs; |
| 9164 | for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel) |
| 9165 | if ((skip[rel->r_offset >> 3] |
| 9166 | & (ref_from_discarded | can_optimize)) == 0) |
| 9167 | { |
| 9168 | wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3]; |
| 9169 | wrel->r_info = rel->r_info; |
| 9170 | wrel->r_addend = rel->r_addend; |
| 9171 | ++wrel; |
| 9172 | } |
| 9173 | else if (!dec_dynrel_count (rel->r_info, toc, info, |
| 9174 | &local_syms, NULL, NULL)) |
| 9175 | goto error_ret; |
| 9176 | |
| 9177 | elf_section_data (toc)->relocs = toc_relocs; |
| 9178 | toc->reloc_count = wrel - toc_relocs; |
| 9179 | rel_hdr = _bfd_elf_single_rel_hdr (toc); |
| 9180 | sz = rel_hdr->sh_entsize; |
| 9181 | rel_hdr->sh_size = toc->reloc_count * sz; |
| 9182 | } |
| 9183 | } |
| 9184 | else if (elf_section_data (toc)->relocs != toc_relocs) |
| 9185 | free (toc_relocs); |
| 9186 | |
| 9187 | if (local_syms != NULL |
| 9188 | && symtab_hdr->contents != (unsigned char *) local_syms) |
| 9189 | { |
| 9190 | if (!info->keep_memory) |
| 9191 | free (local_syms); |
| 9192 | else |
| 9193 | symtab_hdr->contents = (unsigned char *) local_syms; |
| 9194 | } |
| 9195 | free (skip); |
| 9196 | } |
| 9197 | |
| 9198 | /* Look for cases where we can change an indirect GOT access to |
| 9199 | a GOT relative or PC relative access, possibly reducing the |
| 9200 | number of GOT entries. */ |
| 9201 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
| 9202 | { |
| 9203 | asection *sec; |
| 9204 | Elf_Internal_Shdr *symtab_hdr; |
| 9205 | Elf_Internal_Sym *local_syms; |
| 9206 | Elf_Internal_Rela *relstart, *rel; |
| 9207 | bfd_vma got; |
| 9208 | |
| 9209 | if (!is_ppc64_elf (ibfd)) |
| 9210 | continue; |
| 9211 | |
| 9212 | if (!ppc64_elf_tdata (ibfd)->has_optrel) |
| 9213 | continue; |
| 9214 | |
| 9215 | sec = ppc64_elf_tdata (ibfd)->got; |
| 9216 | got = 0; |
| 9217 | if (sec != NULL) |
| 9218 | got = sec->output_section->vma + sec->output_offset + 0x8000; |
| 9219 | |
| 9220 | local_syms = NULL; |
| 9221 | symtab_hdr = &elf_symtab_hdr (ibfd); |
| 9222 | |
| 9223 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) |
| 9224 | { |
| 9225 | if (sec->reloc_count == 0 |
| 9226 | || !ppc64_elf_section_data (sec)->has_optrel |
| 9227 | || discarded_section (sec)) |
| 9228 | continue; |
| 9229 | |
| 9230 | relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, |
| 9231 | info->keep_memory); |
| 9232 | if (relstart == NULL) |
| 9233 | { |
| 9234 | got_error_ret: |
| 9235 | if (symtab_hdr->contents != (unsigned char *) local_syms) |
| 9236 | free (local_syms); |
| 9237 | if (sec != NULL |
| 9238 | && elf_section_data (sec)->relocs != relstart) |
| 9239 | free (relstart); |
| 9240 | return FALSE; |
| 9241 | } |
| 9242 | |
| 9243 | for (rel = relstart; rel < relstart + sec->reloc_count; ++rel) |
| 9244 | { |
| 9245 | enum elf_ppc64_reloc_type r_type; |
| 9246 | unsigned long r_symndx; |
| 9247 | Elf_Internal_Sym *sym; |
| 9248 | asection *sym_sec; |
| 9249 | struct elf_link_hash_entry *h; |
| 9250 | struct got_entry *ent; |
| 9251 | bfd_vma val, pc; |
| 9252 | unsigned char buf[8]; |
| 9253 | unsigned int insn; |
| 9254 | enum {no_check, check_lo, check_ha} insn_check; |
| 9255 | |
| 9256 | r_type = ELF64_R_TYPE (rel->r_info); |
| 9257 | switch (r_type) |
| 9258 | { |
| 9259 | default: |
| 9260 | insn_check = no_check; |
| 9261 | break; |
| 9262 | |
| 9263 | case R_PPC64_PLT16_HA: |
| 9264 | case R_PPC64_GOT_TLSLD16_HA: |
| 9265 | case R_PPC64_GOT_TLSGD16_HA: |
| 9266 | case R_PPC64_GOT_TPREL16_HA: |
| 9267 | case R_PPC64_GOT_DTPREL16_HA: |
| 9268 | case R_PPC64_GOT16_HA: |
| 9269 | case R_PPC64_TOC16_HA: |
| 9270 | insn_check = check_ha; |
| 9271 | break; |
| 9272 | |
| 9273 | case R_PPC64_PLT16_LO: |
| 9274 | case R_PPC64_PLT16_LO_DS: |
| 9275 | case R_PPC64_GOT_TLSLD16_LO: |
| 9276 | case R_PPC64_GOT_TLSGD16_LO: |
| 9277 | case R_PPC64_GOT_TPREL16_LO_DS: |
| 9278 | case R_PPC64_GOT_DTPREL16_LO_DS: |
| 9279 | case R_PPC64_GOT16_LO: |
| 9280 | case R_PPC64_GOT16_LO_DS: |
| 9281 | case R_PPC64_TOC16_LO: |
| 9282 | case R_PPC64_TOC16_LO_DS: |
| 9283 | insn_check = check_lo; |
| 9284 | break; |
| 9285 | } |
| 9286 | |
| 9287 | if (insn_check != no_check) |
| 9288 | { |
| 9289 | bfd_vma off = rel->r_offset & ~3; |
| 9290 | |
| 9291 | if (!bfd_get_section_contents (ibfd, sec, buf, off, 4)) |
| 9292 | goto got_error_ret; |
| 9293 | |
| 9294 | insn = bfd_get_32 (ibfd, buf); |
| 9295 | if (insn_check == check_lo |
| 9296 | ? !ok_lo_toc_insn (insn, r_type) |
| 9297 | : ((insn & ((0x3fu << 26) | 0x1f << 16)) |
| 9298 | != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)) |
| 9299 | { |
| 9300 | char str[12]; |
| 9301 | |
| 9302 | ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1; |
| 9303 | sprintf (str, "%#08x", insn); |
| 9304 | info->callbacks->einfo |
| 9305 | /* xgettext:c-format */ |
| 9306 | (_("%H: got/toc optimization is not supported for" |
| 9307 | " %s instruction\n"), |
| 9308 | ibfd, sec, rel->r_offset & ~3, str); |
| 9309 | continue; |
| 9310 | } |
| 9311 | } |
| 9312 | |
| 9313 | switch (r_type) |
| 9314 | { |
| 9315 | /* Note that we don't delete GOT entries for |
| 9316 | R_PPC64_GOT16_DS since we'd need a lot more |
| 9317 | analysis. For starters, the preliminary layout is |
| 9318 | before the GOT, PLT, dynamic sections and stubs are |
| 9319 | laid out. Then we'd need to allow for changes in |
| 9320 | distance between sections caused by alignment. */ |
| 9321 | default: |
| 9322 | continue; |
| 9323 | |
| 9324 | case R_PPC64_GOT16_HA: |
| 9325 | case R_PPC64_GOT16_LO_DS: |
| 9326 | case R_PPC64_GOT_PCREL34: |
| 9327 | break; |
| 9328 | } |
| 9329 | |
| 9330 | r_symndx = ELF64_R_SYM (rel->r_info); |
| 9331 | if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, |
| 9332 | r_symndx, ibfd)) |
| 9333 | goto got_error_ret; |
| 9334 | |
| 9335 | if (sym_sec == NULL |
| 9336 | || sym_sec->output_section == NULL |
| 9337 | || discarded_section (sym_sec)) |
| 9338 | continue; |
| 9339 | |
| 9340 | if ((h ? h->type : ELF_ST_TYPE (sym->st_info)) == STT_GNU_IFUNC) |
| 9341 | continue; |
| 9342 | |
| 9343 | if (!SYMBOL_REFERENCES_LOCAL (info, h)) |
| 9344 | continue; |
| 9345 | |
| 9346 | if (h != NULL) |
| 9347 | val = h->root.u.def.value; |
| 9348 | else |
| 9349 | val = sym->st_value; |
| 9350 | val += rel->r_addend; |
| 9351 | val += sym_sec->output_section->vma + sym_sec->output_offset; |
| 9352 | |
| 9353 | /* Fudge factor to allow for the fact that the preliminary layout |
| 9354 | isn't exact. Reduce limits by this factor. */ |
| 9355 | #define LIMIT_ADJUST(LIMIT) ((LIMIT) - (LIMIT) / 16) |
| 9356 | |
| 9357 | switch (r_type) |
| 9358 | { |
| 9359 | default: |
| 9360 | continue; |
| 9361 | |
| 9362 | case R_PPC64_GOT16_HA: |
| 9363 | if (val - got + LIMIT_ADJUST (0x80008000ULL) |
| 9364 | >= LIMIT_ADJUST (0x100000000ULL)) |
| 9365 | continue; |
| 9366 | |
| 9367 | if (!bfd_get_section_contents (ibfd, sec, buf, |
| 9368 | rel->r_offset & ~3, 4)) |
| 9369 | goto got_error_ret; |
| 9370 | insn = bfd_get_32 (ibfd, buf); |
| 9371 | if (((insn & ((0x3fu << 26) | 0x1f << 16)) |
| 9372 | != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)) |
| 9373 | continue; |
| 9374 | break; |
| 9375 | |
| 9376 | case R_PPC64_GOT16_LO_DS: |
| 9377 | if (val - got + LIMIT_ADJUST (0x80008000ULL) |
| 9378 | >= LIMIT_ADJUST (0x100000000ULL)) |
| 9379 | continue; |
| 9380 | if (!bfd_get_section_contents (ibfd, sec, buf, |
| 9381 | rel->r_offset & ~3, 4)) |
| 9382 | goto got_error_ret; |
| 9383 | insn = bfd_get_32 (ibfd, buf); |
| 9384 | if ((insn & (0x3fu << 26 | 0x3)) != 58u << 26 /* ld */) |
| 9385 | continue; |
| 9386 | break; |
| 9387 | |
| 9388 | case R_PPC64_GOT_PCREL34: |
| 9389 | pc = rel->r_offset; |
| 9390 | pc += sec->output_section->vma + sec->output_offset; |
| 9391 | if (val - pc + LIMIT_ADJUST (1ULL << 33) |
| 9392 | >= LIMIT_ADJUST (1ULL << 34)) |
| 9393 | continue; |
| 9394 | if (!bfd_get_section_contents (ibfd, sec, buf, |
| 9395 | rel->r_offset & ~3, 8)) |
| 9396 | goto got_error_ret; |
| 9397 | insn = bfd_get_32 (ibfd, buf); |
| 9398 | if ((insn & (-1u << 18)) != ((1u << 26) | (1u << 20))) |
| 9399 | continue; |
| 9400 | insn = bfd_get_32 (ibfd, buf + 4); |
| 9401 | if ((insn & (0x3fu << 26)) != 57u << 26) |
| 9402 | continue; |
| 9403 | break; |
| 9404 | } |
| 9405 | #undef LIMIT_ADJUST |
| 9406 | |
| 9407 | if (h != NULL) |
| 9408 | ent = h->got.glist; |
| 9409 | else |
| 9410 | { |
| 9411 | struct got_entry **local_got_ents = elf_local_got_ents (ibfd); |
| 9412 | ent = local_got_ents[r_symndx]; |
| 9413 | } |
| 9414 | for (; ent != NULL; ent = ent->next) |
| 9415 | if (ent->addend == rel->r_addend |
| 9416 | && ent->owner == ibfd |
| 9417 | && ent->tls_type == 0) |
| 9418 | break; |
| 9419 | BFD_ASSERT (ent && ent->got.refcount > 0); |
| 9420 | ent->got.refcount -= 1; |
| 9421 | } |
| 9422 | |
| 9423 | if (elf_section_data (sec)->relocs != relstart) |
| 9424 | free (relstart); |
| 9425 | } |
| 9426 | |
| 9427 | if (local_syms != NULL |
| 9428 | && symtab_hdr->contents != (unsigned char *) local_syms) |
| 9429 | { |
| 9430 | if (!info->keep_memory) |
| 9431 | free (local_syms); |
| 9432 | else |
| 9433 | symtab_hdr->contents = (unsigned char *) local_syms; |
| 9434 | } |
| 9435 | } |
| 9436 | |
| 9437 | return TRUE; |
| 9438 | } |
| 9439 | |
| 9440 | /* Return true iff input section I references the TOC using |
| 9441 | instructions limited to +/-32k offsets. */ |
| 9442 | |
| 9443 | bfd_boolean |
| 9444 | ppc64_elf_has_small_toc_reloc (asection *i) |
| 9445 | { |
| 9446 | return (is_ppc64_elf (i->owner) |
| 9447 | && ppc64_elf_tdata (i->owner)->has_small_toc_reloc); |
| 9448 | } |
| 9449 | |
| 9450 | /* Allocate space for one GOT entry. */ |
| 9451 | |
| 9452 | static void |
| 9453 | allocate_got (struct elf_link_hash_entry *h, |
| 9454 | struct bfd_link_info *info, |
| 9455 | struct got_entry *gent) |
| 9456 | { |
| 9457 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
| 9458 | struct ppc_link_hash_entry *eh = ppc_elf_hash_entry (h); |
| 9459 | int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD) |
| 9460 | ? 16 : 8); |
| 9461 | int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD |
| 9462 | ? 2 : 1) * sizeof (Elf64_External_Rela); |
| 9463 | asection *got = ppc64_elf_tdata (gent->owner)->got; |
| 9464 | |
| 9465 | gent->got.offset = got->size; |
| 9466 | got->size += entsize; |
| 9467 | |
| 9468 | if (h->type == STT_GNU_IFUNC) |
| 9469 | { |
| 9470 | htab->elf.irelplt->size += rentsize; |
| 9471 | htab->got_reli_size += rentsize; |
| 9472 | } |
| 9473 | else if (((bfd_link_pic (info) |
| 9474 | && !(gent->tls_type != 0 |
| 9475 | && bfd_link_executable (info) |
| 9476 | && SYMBOL_REFERENCES_LOCAL (info, h))) |
| 9477 | || (htab->elf.dynamic_sections_created |
| 9478 | && h->dynindx != -1 |
| 9479 | && !SYMBOL_REFERENCES_LOCAL (info, h))) |
| 9480 | && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) |
| 9481 | { |
| 9482 | asection *relgot = ppc64_elf_tdata (gent->owner)->relgot; |
| 9483 | relgot->size += rentsize; |
| 9484 | } |
| 9485 | } |
| 9486 | |
| 9487 | /* This function merges got entries in the same toc group. */ |
| 9488 | |
| 9489 | static void |
| 9490 | merge_got_entries (struct got_entry **pent) |
| 9491 | { |
| 9492 | struct got_entry *ent, *ent2; |
| 9493 | |
| 9494 | for (ent = *pent; ent != NULL; ent = ent->next) |
| 9495 | if (!ent->is_indirect) |
| 9496 | for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next) |
| 9497 | if (!ent2->is_indirect |
| 9498 | && ent2->addend == ent->addend |
| 9499 | && ent2->tls_type == ent->tls_type |
| 9500 | && elf_gp (ent2->owner) == elf_gp (ent->owner)) |
| 9501 | { |
| 9502 | ent2->is_indirect = TRUE; |
| 9503 | ent2->got.ent = ent; |
| 9504 | } |
| 9505 | } |
| 9506 | |
| 9507 | /* If H is undefined, make it dynamic if that makes sense. */ |
| 9508 | |
| 9509 | static bfd_boolean |
| 9510 | ensure_undef_dynamic (struct bfd_link_info *info, |
| 9511 | struct elf_link_hash_entry *h) |
| 9512 | { |
| 9513 | struct elf_link_hash_table *htab = elf_hash_table (info); |
| 9514 | |
| 9515 | if (htab->dynamic_sections_created |
| 9516 | && ((info->dynamic_undefined_weak != 0 |
| 9517 | && h->root.type == bfd_link_hash_undefweak) |
| 9518 | || h->root.type == bfd_link_hash_undefined) |
| 9519 | && h->dynindx == -1 |
| 9520 | && !h->forced_local |
| 9521 | && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) |
| 9522 | return bfd_elf_link_record_dynamic_symbol (info, h); |
| 9523 | return TRUE; |
| 9524 | } |
| 9525 | |
| 9526 | /* Allocate space in .plt, .got and associated reloc sections for |
| 9527 | dynamic relocs. */ |
| 9528 | |
| 9529 | static bfd_boolean |
| 9530 | allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) |
| 9531 | { |
| 9532 | struct bfd_link_info *info; |
| 9533 | struct ppc_link_hash_table *htab; |
| 9534 | asection *s; |
| 9535 | struct ppc_link_hash_entry *eh; |
| 9536 | struct got_entry **pgent, *gent; |
| 9537 | |
| 9538 | if (h->root.type == bfd_link_hash_indirect) |
| 9539 | return TRUE; |
| 9540 | |
| 9541 | info = (struct bfd_link_info *) inf; |
| 9542 | htab = ppc_hash_table (info); |
| 9543 | if (htab == NULL) |
| 9544 | return FALSE; |
| 9545 | |
| 9546 | eh = ppc_elf_hash_entry (h); |
| 9547 | /* Run through the TLS GD got entries first if we're changing them |
| 9548 | to TPREL. */ |
| 9549 | if ((eh->tls_mask & (TLS_TLS | TLS_GDIE)) == (TLS_TLS | TLS_GDIE)) |
| 9550 | for (gent = h->got.glist; gent != NULL; gent = gent->next) |
| 9551 | if (gent->got.refcount > 0 |
| 9552 | && (gent->tls_type & TLS_GD) != 0) |
| 9553 | { |
| 9554 | /* This was a GD entry that has been converted to TPREL. If |
| 9555 | there happens to be a TPREL entry we can use that one. */ |
| 9556 | struct got_entry *ent; |
| 9557 | for (ent = h->got.glist; ent != NULL; ent = ent->next) |
| 9558 | if (ent->got.refcount > 0 |
| 9559 | && (ent->tls_type & TLS_TPREL) != 0 |
| 9560 | && ent->addend == gent->addend |
| 9561 | && ent->owner == gent->owner) |
| 9562 | { |
| 9563 | gent->got.refcount = 0; |
| 9564 | break; |
| 9565 | } |
| 9566 | |
| 9567 | /* If not, then we'll be using our own TPREL entry. */ |
| 9568 | if (gent->got.refcount != 0) |
| 9569 | gent->tls_type = TLS_TLS | TLS_TPREL; |
| 9570 | } |
| 9571 | |
| 9572 | /* Remove any list entry that won't generate a word in the GOT before |
| 9573 | we call merge_got_entries. Otherwise we risk merging to empty |
| 9574 | entries. */ |
| 9575 | pgent = &h->got.glist; |
| 9576 | while ((gent = *pgent) != NULL) |
| 9577 | if (gent->got.refcount > 0) |
| 9578 | { |
| 9579 | if ((gent->tls_type & TLS_LD) != 0 |
| 9580 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
| 9581 | { |
| 9582 | ppc64_tlsld_got (gent->owner)->got.refcount += 1; |
| 9583 | *pgent = gent->next; |
| 9584 | } |
| 9585 | else |
| 9586 | pgent = &gent->next; |
| 9587 | } |
| 9588 | else |
| 9589 | *pgent = gent->next; |
| 9590 | |
| 9591 | if (!htab->do_multi_toc) |
| 9592 | merge_got_entries (&h->got.glist); |
| 9593 | |
| 9594 | for (gent = h->got.glist; gent != NULL; gent = gent->next) |
| 9595 | if (!gent->is_indirect) |
| 9596 | { |
| 9597 | /* Ensure we catch all the cases where this symbol should |
| 9598 | be made dynamic. */ |
| 9599 | if (!ensure_undef_dynamic (info, h)) |
| 9600 | return FALSE; |
| 9601 | |
| 9602 | if (!is_ppc64_elf (gent->owner)) |
| 9603 | abort (); |
| 9604 | |
| 9605 | allocate_got (h, info, gent); |
| 9606 | } |
| 9607 | |
| 9608 | /* If no dynamic sections we can't have dynamic relocs, except for |
| 9609 | IFUNCs which are handled even in static executables. */ |
| 9610 | if (!htab->elf.dynamic_sections_created |
| 9611 | && h->type != STT_GNU_IFUNC) |
| 9612 | h->dyn_relocs = NULL; |
| 9613 | |
| 9614 | /* Discard relocs on undefined symbols that must be local. */ |
| 9615 | else if (h->root.type == bfd_link_hash_undefined |
| 9616 | && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) |
| 9617 | h->dyn_relocs = NULL; |
| 9618 | |
| 9619 | /* Also discard relocs on undefined weak syms with non-default |
| 9620 | visibility, or when dynamic_undefined_weak says so. */ |
| 9621 | else if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) |
| 9622 | h->dyn_relocs = NULL; |
| 9623 | |
| 9624 | if (h->dyn_relocs != NULL) |
| 9625 | { |
| 9626 | struct elf_dyn_relocs *p, **pp; |
| 9627 | |
| 9628 | /* In the shared -Bsymbolic case, discard space allocated for |
| 9629 | dynamic pc-relative relocs against symbols which turn out to |
| 9630 | be defined in regular objects. For the normal shared case, |
| 9631 | discard space for relocs that have become local due to symbol |
| 9632 | visibility changes. */ |
| 9633 | if (bfd_link_pic (info)) |
| 9634 | { |
| 9635 | /* Relocs that use pc_count are those that appear on a call |
| 9636 | insn, or certain REL relocs (see must_be_dyn_reloc) that |
| 9637 | can be generated via assembly. We want calls to |
| 9638 | protected symbols to resolve directly to the function |
| 9639 | rather than going via the plt. If people want function |
| 9640 | pointer comparisons to work as expected then they should |
| 9641 | avoid writing weird assembly. */ |
| 9642 | if (SYMBOL_CALLS_LOCAL (info, h)) |
| 9643 | { |
| 9644 | for (pp = &h->dyn_relocs; (p = *pp) != NULL; ) |
| 9645 | { |
| 9646 | p->count -= p->pc_count; |
| 9647 | p->pc_count = 0; |
| 9648 | if (p->count == 0) |
| 9649 | *pp = p->next; |
| 9650 | else |
| 9651 | pp = &p->next; |
| 9652 | } |
| 9653 | } |
| 9654 | |
| 9655 | if (h->dyn_relocs != NULL) |
| 9656 | { |
| 9657 | /* Ensure we catch all the cases where this symbol |
| 9658 | should be made dynamic. */ |
| 9659 | if (!ensure_undef_dynamic (info, h)) |
| 9660 | return FALSE; |
| 9661 | } |
| 9662 | } |
| 9663 | |
| 9664 | /* For a fixed position executable, discard space for |
| 9665 | relocs against symbols which are not dynamic. */ |
| 9666 | else if (h->type != STT_GNU_IFUNC) |
| 9667 | { |
| 9668 | if (h->dynamic_adjusted |
| 9669 | && !h->def_regular |
| 9670 | && !ELF_COMMON_DEF_P (h)) |
| 9671 | { |
| 9672 | /* Ensure we catch all the cases where this symbol |
| 9673 | should be made dynamic. */ |
| 9674 | if (!ensure_undef_dynamic (info, h)) |
| 9675 | return FALSE; |
| 9676 | |
| 9677 | /* But if that didn't work out, discard dynamic relocs. */ |
| 9678 | if (h->dynindx == -1) |
| 9679 | h->dyn_relocs = NULL; |
| 9680 | } |
| 9681 | else |
| 9682 | h->dyn_relocs = NULL; |
| 9683 | } |
| 9684 | |
| 9685 | /* Finally, allocate space. */ |
| 9686 | for (p = h->dyn_relocs; p != NULL; p = p->next) |
| 9687 | { |
| 9688 | asection *sreloc = elf_section_data (p->sec)->sreloc; |
| 9689 | if (eh->elf.type == STT_GNU_IFUNC) |
| 9690 | sreloc = htab->elf.irelplt; |
| 9691 | sreloc->size += p->count * sizeof (Elf64_External_Rela); |
| 9692 | } |
| 9693 | } |
| 9694 | |
| 9695 | /* We might need a PLT entry when the symbol |
| 9696 | a) is dynamic, or |
| 9697 | b) is an ifunc, or |
| 9698 | c) has plt16 relocs and has been processed by adjust_dynamic_symbol, or |
| 9699 | d) has plt16 relocs and we are linking statically. */ |
| 9700 | if ((htab->elf.dynamic_sections_created && h->dynindx != -1) |
| 9701 | || h->type == STT_GNU_IFUNC |
| 9702 | || (h->needs_plt && h->dynamic_adjusted) |
| 9703 | || (h->needs_plt |
| 9704 | && h->def_regular |
| 9705 | && !htab->elf.dynamic_sections_created |
| 9706 | && !htab->can_convert_all_inline_plt |
| 9707 | && (ppc_elf_hash_entry (h)->tls_mask |
| 9708 | & (TLS_TLS | PLT_KEEP)) == PLT_KEEP)) |
| 9709 | { |
| 9710 | struct plt_entry *pent; |
| 9711 | bfd_boolean doneone = FALSE; |
| 9712 | for (pent = h->plt.plist; pent != NULL; pent = pent->next) |
| 9713 | if (pent->plt.refcount > 0) |
| 9714 | { |
| 9715 | if (!htab->elf.dynamic_sections_created |
| 9716 | || h->dynindx == -1) |
| 9717 | { |
| 9718 | if (h->type == STT_GNU_IFUNC) |
| 9719 | { |
| 9720 | s = htab->elf.iplt; |
| 9721 | pent->plt.offset = s->size; |
| 9722 | s->size += PLT_ENTRY_SIZE (htab); |
| 9723 | s = htab->elf.irelplt; |
| 9724 | } |
| 9725 | else |
| 9726 | { |
| 9727 | s = htab->pltlocal; |
| 9728 | pent->plt.offset = s->size; |
| 9729 | s->size += LOCAL_PLT_ENTRY_SIZE (htab); |
| 9730 | s = bfd_link_pic (info) ? htab->relpltlocal : NULL; |
| 9731 | } |
| 9732 | } |
| 9733 | else |
| 9734 | { |
| 9735 | /* If this is the first .plt entry, make room for the special |
| 9736 | first entry. */ |
| 9737 | s = htab->elf.splt; |
| 9738 | if (s->size == 0) |
| 9739 | s->size += PLT_INITIAL_ENTRY_SIZE (htab); |
| 9740 | |
| 9741 | pent->plt.offset = s->size; |
| 9742 | |
| 9743 | /* Make room for this entry. */ |
| 9744 | s->size += PLT_ENTRY_SIZE (htab); |
| 9745 | |
| 9746 | /* Make room for the .glink code. */ |
| 9747 | s = htab->glink; |
| 9748 | if (s->size == 0) |
| 9749 | s->size += GLINK_PLTRESOLVE_SIZE (htab); |
| 9750 | if (htab->opd_abi) |
| 9751 | { |
| 9752 | /* We need bigger stubs past index 32767. */ |
| 9753 | if (s->size >= GLINK_PLTRESOLVE_SIZE (htab) + 32768*2*4) |
| 9754 | s->size += 4; |
| 9755 | s->size += 2*4; |
| 9756 | } |
| 9757 | else |
| 9758 | s->size += 4; |
| 9759 | |
| 9760 | /* We also need to make an entry in the .rela.plt section. */ |
| 9761 | s = htab->elf.srelplt; |
| 9762 | } |
| 9763 | if (s != NULL) |
| 9764 | s->size += sizeof (Elf64_External_Rela); |
| 9765 | doneone = TRUE; |
| 9766 | } |
| 9767 | else |
| 9768 | pent->plt.offset = (bfd_vma) -1; |
| 9769 | if (!doneone) |
| 9770 | { |
| 9771 | h->plt.plist = NULL; |
| 9772 | h->needs_plt = 0; |
| 9773 | } |
| 9774 | } |
| 9775 | else |
| 9776 | { |
| 9777 | h->plt.plist = NULL; |
| 9778 | h->needs_plt = 0; |
| 9779 | } |
| 9780 | |
| 9781 | return TRUE; |
| 9782 | } |
| 9783 | |
| 9784 | #define PPC_LO(v) ((v) & 0xffff) |
| 9785 | #define PPC_HI(v) (((v) >> 16) & 0xffff) |
| 9786 | #define PPC_HA(v) PPC_HI ((v) + 0x8000) |
| 9787 | #define D34(v) \ |
| 9788 | ((((v) & 0x3ffff0000ULL) << 16) | (v & 0xffff)) |
| 9789 | #define HA34(v) ((v + (1ULL << 33)) >> 34) |
| 9790 | |
| 9791 | /* Called via elf_link_hash_traverse from ppc64_elf_size_dynamic_sections |
| 9792 | to set up space for global entry stubs. These are put in glink, |
| 9793 | after the branch table. */ |
| 9794 | |
| 9795 | static bfd_boolean |
| 9796 | size_global_entry_stubs (struct elf_link_hash_entry *h, void *inf) |
| 9797 | { |
| 9798 | struct bfd_link_info *info; |
| 9799 | struct ppc_link_hash_table *htab; |
| 9800 | struct plt_entry *pent; |
| 9801 | asection *s, *plt; |
| 9802 | |
| 9803 | if (h->root.type == bfd_link_hash_indirect) |
| 9804 | return TRUE; |
| 9805 | |
| 9806 | if (!h->pointer_equality_needed) |
| 9807 | return TRUE; |
| 9808 | |
| 9809 | if (h->def_regular) |
| 9810 | return TRUE; |
| 9811 | |
| 9812 | info = inf; |
| 9813 | htab = ppc_hash_table (info); |
| 9814 | if (htab == NULL) |
| 9815 | return FALSE; |
| 9816 | |
| 9817 | s = htab->global_entry; |
| 9818 | plt = htab->elf.splt; |
| 9819 | for (pent = h->plt.plist; pent != NULL; pent = pent->next) |
| 9820 | if (pent->plt.offset != (bfd_vma) -1 |
| 9821 | && pent->addend == 0) |
| 9822 | { |
| 9823 | /* For ELFv2, if this symbol is not defined in a regular file |
| 9824 | and we are not generating a shared library or pie, then we |
| 9825 | need to define the symbol in the executable on a call stub. |
| 9826 | This is to avoid text relocations. */ |
| 9827 | bfd_vma off, stub_align, stub_off, stub_size; |
| 9828 | unsigned int align_power; |
| 9829 | |
| 9830 | stub_size = 16; |
| 9831 | stub_off = s->size; |
| 9832 | if (htab->params->plt_stub_align >= 0) |
| 9833 | align_power = htab->params->plt_stub_align; |
| 9834 | else |
| 9835 | align_power = -htab->params->plt_stub_align; |
| 9836 | /* Setting section alignment is delayed until we know it is |
| 9837 | non-empty. Otherwise the .text output section will be |
| 9838 | aligned at least to plt_stub_align even when no global |
| 9839 | entry stubs are needed. */ |
| 9840 | if (s->alignment_power < align_power) |
| 9841 | s->alignment_power = align_power; |
| 9842 | stub_align = (bfd_vma) 1 << align_power; |
| 9843 | if (htab->params->plt_stub_align >= 0 |
| 9844 | || ((((stub_off + stub_size - 1) & -stub_align) |
| 9845 | - (stub_off & -stub_align)) |
| 9846 | > ((stub_size - 1) & -stub_align))) |
| 9847 | stub_off = (stub_off + stub_align - 1) & -stub_align; |
| 9848 | off = pent->plt.offset + plt->output_offset + plt->output_section->vma; |
| 9849 | off -= stub_off + s->output_offset + s->output_section->vma; |
| 9850 | /* Note that for --plt-stub-align negative we have a possible |
| 9851 | dependency between stub offset and size. Break that |
| 9852 | dependency by assuming the max stub size when calculating |
| 9853 | the stub offset. */ |
| 9854 | if (PPC_HA (off) == 0) |
| 9855 | stub_size -= 4; |
| 9856 | h->root.type = bfd_link_hash_defined; |
| 9857 | h->root.u.def.section = s; |
| 9858 | h->root.u.def.value = stub_off; |
| 9859 | s->size = stub_off + stub_size; |
| 9860 | break; |
| 9861 | } |
| 9862 | return TRUE; |
| 9863 | } |
| 9864 | |
| 9865 | /* Set DF_TEXTREL if we find any dynamic relocs that apply to |
| 9866 | read-only sections. */ |
| 9867 | |
| 9868 | static bfd_boolean |
| 9869 | maybe_set_textrel (struct elf_link_hash_entry *h, void *inf) |
| 9870 | { |
| 9871 | asection *sec; |
| 9872 | |
| 9873 | if (h->root.type == bfd_link_hash_indirect) |
| 9874 | return TRUE; |
| 9875 | |
| 9876 | sec = _bfd_elf_readonly_dynrelocs (h); |
| 9877 | if (sec != NULL) |
| 9878 | { |
| 9879 | struct bfd_link_info *info = (struct bfd_link_info *) inf; |
| 9880 | |
| 9881 | info->flags |= DF_TEXTREL; |
| 9882 | info->callbacks->minfo (_("%pB: dynamic relocation against `%pT'" |
| 9883 | " in read-only section `%pA'\n"), |
| 9884 | sec->owner, h->root.root.string, sec); |
| 9885 | |
| 9886 | /* Not an error, just cut short the traversal. */ |
| 9887 | return FALSE; |
| 9888 | } |
| 9889 | return TRUE; |
| 9890 | } |
| 9891 | |
| 9892 | /* Set the sizes of the dynamic sections. */ |
| 9893 | |
| 9894 | static bfd_boolean |
| 9895 | ppc64_elf_size_dynamic_sections (bfd *output_bfd, |
| 9896 | struct bfd_link_info *info) |
| 9897 | { |
| 9898 | struct ppc_link_hash_table *htab; |
| 9899 | bfd *dynobj; |
| 9900 | asection *s; |
| 9901 | bfd_boolean relocs; |
| 9902 | bfd *ibfd; |
| 9903 | struct got_entry *first_tlsld; |
| 9904 | |
| 9905 | htab = ppc_hash_table (info); |
| 9906 | if (htab == NULL) |
| 9907 | return FALSE; |
| 9908 | |
| 9909 | dynobj = htab->elf.dynobj; |
| 9910 | if (dynobj == NULL) |
| 9911 | abort (); |
| 9912 | |
| 9913 | if (htab->elf.dynamic_sections_created) |
| 9914 | { |
| 9915 | /* Set the contents of the .interp section to the interpreter. */ |
| 9916 | if (bfd_link_executable (info) && !info->nointerp) |
| 9917 | { |
| 9918 | s = bfd_get_linker_section (dynobj, ".interp"); |
| 9919 | if (s == NULL) |
| 9920 | abort (); |
| 9921 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
| 9922 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
| 9923 | } |
| 9924 | } |
| 9925 | |
| 9926 | /* Set up .got offsets for local syms, and space for local dynamic |
| 9927 | relocs. */ |
| 9928 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
| 9929 | { |
| 9930 | struct got_entry **lgot_ents; |
| 9931 | struct got_entry **end_lgot_ents; |
| 9932 | struct plt_entry **local_plt; |
| 9933 | struct plt_entry **end_local_plt; |
| 9934 | unsigned char *lgot_masks; |
| 9935 | bfd_size_type locsymcount; |
| 9936 | Elf_Internal_Shdr *symtab_hdr; |
| 9937 | |
| 9938 | if (!is_ppc64_elf (ibfd)) |
| 9939 | continue; |
| 9940 | |
| 9941 | for (s = ibfd->sections; s != NULL; s = s->next) |
| 9942 | { |
| 9943 | struct ppc_dyn_relocs *p; |
| 9944 | |
| 9945 | for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next) |
| 9946 | { |
| 9947 | if (!bfd_is_abs_section (p->sec) |
| 9948 | && bfd_is_abs_section (p->sec->output_section)) |
| 9949 | { |
| 9950 | /* Input section has been discarded, either because |
| 9951 | it is a copy of a linkonce section or due to |
| 9952 | linker script /DISCARD/, so we'll be discarding |
| 9953 | the relocs too. */ |
| 9954 | } |
| 9955 | else if (p->count != 0) |
| 9956 | { |
| 9957 | asection *srel = elf_section_data (p->sec)->sreloc; |
| 9958 | if (p->ifunc) |
| 9959 | srel = htab->elf.irelplt; |
| 9960 | srel->size += p->count * sizeof (Elf64_External_Rela); |
| 9961 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) |
| 9962 | info->flags |= DF_TEXTREL; |
| 9963 | } |
| 9964 | } |
| 9965 | } |
| 9966 | |
| 9967 | lgot_ents = elf_local_got_ents (ibfd); |
| 9968 | if (!lgot_ents) |
| 9969 | continue; |
| 9970 | |
| 9971 | symtab_hdr = &elf_symtab_hdr (ibfd); |
| 9972 | locsymcount = symtab_hdr->sh_info; |
| 9973 | end_lgot_ents = lgot_ents + locsymcount; |
| 9974 | local_plt = (struct plt_entry **) end_lgot_ents; |
| 9975 | end_local_plt = local_plt + locsymcount; |
| 9976 | lgot_masks = (unsigned char *) end_local_plt; |
| 9977 | s = ppc64_elf_tdata (ibfd)->got; |
| 9978 | for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks) |
| 9979 | { |
| 9980 | struct got_entry **pent, *ent; |
| 9981 | |
| 9982 | pent = lgot_ents; |
| 9983 | while ((ent = *pent) != NULL) |
| 9984 | if (ent->got.refcount > 0) |
| 9985 | { |
| 9986 | if ((ent->tls_type & *lgot_masks & TLS_LD) != 0) |
| 9987 | { |
| 9988 | ppc64_tlsld_got (ibfd)->got.refcount += 1; |
| 9989 | *pent = ent->next; |
| 9990 | } |
| 9991 | else |
| 9992 | { |
| 9993 | unsigned int ent_size = 8; |
| 9994 | unsigned int rel_size = sizeof (Elf64_External_Rela); |
| 9995 | |
| 9996 | ent->got.offset = s->size; |
| 9997 | if ((ent->tls_type & *lgot_masks & TLS_GD) != 0) |
| 9998 | { |
| 9999 | ent_size *= 2; |
| 10000 | rel_size *= 2; |
| 10001 | } |
| 10002 | s->size += ent_size; |
| 10003 | if ((*lgot_masks & (TLS_TLS | PLT_IFUNC)) == PLT_IFUNC) |
| 10004 | { |
| 10005 | htab->elf.irelplt->size += rel_size; |
| 10006 | htab->got_reli_size += rel_size; |
| 10007 | } |
| 10008 | else if (bfd_link_pic (info) |
| 10009 | && !(ent->tls_type != 0 |
| 10010 | && bfd_link_executable (info))) |
| 10011 | { |
| 10012 | asection *srel = ppc64_elf_tdata (ibfd)->relgot; |
| 10013 | srel->size += rel_size; |
| 10014 | } |
| 10015 | pent = &ent->next; |
| 10016 | } |
| 10017 | } |
| 10018 | else |
| 10019 | *pent = ent->next; |
| 10020 | } |
| 10021 | |
| 10022 | /* Allocate space for plt calls to local syms. */ |
| 10023 | lgot_masks = (unsigned char *) end_local_plt; |
| 10024 | for (; local_plt < end_local_plt; ++local_plt, ++lgot_masks) |
| 10025 | { |
| 10026 | struct plt_entry *ent; |
| 10027 | |
| 10028 | for (ent = *local_plt; ent != NULL; ent = ent->next) |
| 10029 | if (ent->plt.refcount > 0) |
| 10030 | { |
| 10031 | if ((*lgot_masks & (TLS_TLS | PLT_IFUNC)) == PLT_IFUNC) |
| 10032 | { |
| 10033 | s = htab->elf.iplt; |
| 10034 | ent->plt.offset = s->size; |
| 10035 | s->size += PLT_ENTRY_SIZE (htab); |
| 10036 | htab->elf.irelplt->size += sizeof (Elf64_External_Rela); |
| 10037 | } |
| 10038 | else if (htab->can_convert_all_inline_plt |
| 10039 | || (*lgot_masks & (TLS_TLS | PLT_KEEP)) != PLT_KEEP) |
| 10040 | ent->plt.offset = (bfd_vma) -1; |
| 10041 | else |
| 10042 | { |
| 10043 | s = htab->pltlocal; |
| 10044 | ent->plt.offset = s->size; |
| 10045 | s->size += LOCAL_PLT_ENTRY_SIZE (htab); |
| 10046 | if (bfd_link_pic (info)) |
| 10047 | htab->relpltlocal->size += sizeof (Elf64_External_Rela); |
| 10048 | } |
| 10049 | } |
| 10050 | else |
| 10051 | ent->plt.offset = (bfd_vma) -1; |
| 10052 | } |
| 10053 | } |
| 10054 | |
| 10055 | /* Allocate global sym .plt and .got entries, and space for global |
| 10056 | sym dynamic relocs. */ |
| 10057 | elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info); |
| 10058 | |
| 10059 | if (!htab->opd_abi && !bfd_link_pic (info)) |
| 10060 | elf_link_hash_traverse (&htab->elf, size_global_entry_stubs, info); |
| 10061 | |
| 10062 | first_tlsld = NULL; |
| 10063 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
| 10064 | { |
| 10065 | struct got_entry *ent; |
| 10066 | |
| 10067 | if (!is_ppc64_elf (ibfd)) |
| 10068 | continue; |
| 10069 | |
| 10070 | ent = ppc64_tlsld_got (ibfd); |
| 10071 | if (ent->got.refcount > 0) |
| 10072 | { |
| 10073 | if (!htab->do_multi_toc && first_tlsld != NULL) |
| 10074 | { |
| 10075 | ent->is_indirect = TRUE; |
| 10076 | ent->got.ent = first_tlsld; |
| 10077 | } |
| 10078 | else |
| 10079 | { |
| 10080 | if (first_tlsld == NULL) |
| 10081 | first_tlsld = ent; |
| 10082 | s = ppc64_elf_tdata (ibfd)->got; |
| 10083 | ent->got.offset = s->size; |
| 10084 | ent->owner = ibfd; |
| 10085 | s->size += 16; |
| 10086 | if (bfd_link_dll (info)) |
| 10087 | { |
| 10088 | asection *srel = ppc64_elf_tdata (ibfd)->relgot; |
| 10089 | srel->size += sizeof (Elf64_External_Rela); |
| 10090 | } |
| 10091 | } |
| 10092 | } |
| 10093 | else |
| 10094 | ent->got.offset = (bfd_vma) -1; |
| 10095 | } |
| 10096 | |
| 10097 | /* We now have determined the sizes of the various dynamic sections. |
| 10098 | Allocate memory for them. */ |
| 10099 | relocs = FALSE; |
| 10100 | for (s = dynobj->sections; s != NULL; s = s->next) |
| 10101 | { |
| 10102 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
| 10103 | continue; |
| 10104 | |
| 10105 | if (s == htab->brlt || s == htab->relbrlt) |
| 10106 | /* These haven't been allocated yet; don't strip. */ |
| 10107 | continue; |
| 10108 | else if (s == htab->elf.sgot |
| 10109 | || s == htab->elf.splt |
| 10110 | || s == htab->elf.iplt |
| 10111 | || s == htab->pltlocal |
| 10112 | || s == htab->glink |
| 10113 | || s == htab->global_entry |
| 10114 | || s == htab->elf.sdynbss |
| 10115 | || s == htab->elf.sdynrelro) |
| 10116 | { |
| 10117 | /* Strip this section if we don't need it; see the |
| 10118 | comment below. */ |
| 10119 | } |
| 10120 | else if (s == htab->glink_eh_frame) |
| 10121 | { |
| 10122 | if (!bfd_is_abs_section (s->output_section)) |
| 10123 | /* Not sized yet. */ |
| 10124 | continue; |
| 10125 | } |
| 10126 | else if (CONST_STRNEQ (s->name, ".rela")) |
| 10127 | { |
| 10128 | if (s->size != 0) |
| 10129 | { |
| 10130 | if (s != htab->elf.srelplt) |
| 10131 | relocs = TRUE; |
| 10132 | |
| 10133 | /* We use the reloc_count field as a counter if we need |
| 10134 | to copy relocs into the output file. */ |
| 10135 | s->reloc_count = 0; |
| 10136 | } |
| 10137 | } |
| 10138 | else |
| 10139 | { |
| 10140 | /* It's not one of our sections, so don't allocate space. */ |
| 10141 | continue; |
| 10142 | } |
| 10143 | |
| 10144 | if (s->size == 0) |
| 10145 | { |
| 10146 | /* If we don't need this section, strip it from the |
| 10147 | output file. This is mostly to handle .rela.bss and |
| 10148 | .rela.plt. We must create both sections in |
| 10149 | create_dynamic_sections, because they must be created |
| 10150 | before the linker maps input sections to output |
| 10151 | sections. The linker does that before |
| 10152 | adjust_dynamic_symbol is called, and it is that |
| 10153 | function which decides whether anything needs to go |
| 10154 | into these sections. */ |
| 10155 | s->flags |= SEC_EXCLUDE; |
| 10156 | continue; |
| 10157 | } |
| 10158 | |
| 10159 | if (bfd_is_abs_section (s->output_section)) |
| 10160 | _bfd_error_handler (_("warning: discarding dynamic section %s"), |
| 10161 | s->name); |
| 10162 | |
| 10163 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
| 10164 | continue; |
| 10165 | |
| 10166 | /* Allocate memory for the section contents. We use bfd_zalloc |
| 10167 | here in case unused entries are not reclaimed before the |
| 10168 | section's contents are written out. This should not happen, |
| 10169 | but this way if it does we get a R_PPC64_NONE reloc in .rela |
| 10170 | sections instead of garbage. |
| 10171 | We also rely on the section contents being zero when writing |
| 10172 | the GOT and .dynrelro. */ |
| 10173 | s->contents = bfd_zalloc (dynobj, s->size); |
| 10174 | if (s->contents == NULL) |
| 10175 | return FALSE; |
| 10176 | } |
| 10177 | |
| 10178 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
| 10179 | { |
| 10180 | if (!is_ppc64_elf (ibfd)) |
| 10181 | continue; |
| 10182 | |
| 10183 | s = ppc64_elf_tdata (ibfd)->got; |
| 10184 | if (s != NULL && s != htab->elf.sgot) |
| 10185 | { |
| 10186 | if (s->size == 0) |
| 10187 | s->flags |= SEC_EXCLUDE; |
| 10188 | else |
| 10189 | { |
| 10190 | s->contents = bfd_zalloc (ibfd, s->size); |
| 10191 | if (s->contents == NULL) |
| 10192 | return FALSE; |
| 10193 | } |
| 10194 | } |
| 10195 | s = ppc64_elf_tdata (ibfd)->relgot; |
| 10196 | if (s != NULL) |
| 10197 | { |
| 10198 | if (s->size == 0) |
| 10199 | s->flags |= SEC_EXCLUDE; |
| 10200 | else |
| 10201 | { |
| 10202 | s->contents = bfd_zalloc (ibfd, s->size); |
| 10203 | if (s->contents == NULL) |
| 10204 | return FALSE; |
| 10205 | relocs = TRUE; |
| 10206 | s->reloc_count = 0; |
| 10207 | } |
| 10208 | } |
| 10209 | } |
| 10210 | |
| 10211 | if (htab->elf.dynamic_sections_created) |
| 10212 | { |
| 10213 | bfd_boolean tls_opt; |
| 10214 | |
| 10215 | /* Add some entries to the .dynamic section. We fill in the |
| 10216 | values later, in ppc64_elf_finish_dynamic_sections, but we |
| 10217 | must add the entries now so that we get the correct size for |
| 10218 | the .dynamic section. The DT_DEBUG entry is filled in by the |
| 10219 | dynamic linker and used by the debugger. */ |
| 10220 | #define add_dynamic_entry(TAG, VAL) \ |
| 10221 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
| 10222 | |
| 10223 | if (bfd_link_executable (info)) |
| 10224 | { |
| 10225 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
| 10226 | return FALSE; |
| 10227 | } |
| 10228 | |
| 10229 | if (htab->elf.splt != NULL && htab->elf.splt->size != 0) |
| 10230 | { |
| 10231 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
| 10232 | || !add_dynamic_entry (DT_PLTRELSZ, 0) |
| 10233 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) |
| 10234 | || !add_dynamic_entry (DT_JMPREL, 0) |
| 10235 | || !add_dynamic_entry (DT_PPC64_GLINK, 0)) |
| 10236 | return FALSE; |
| 10237 | } |
| 10238 | |
| 10239 | if (NO_OPD_RELOCS && abiversion (output_bfd) <= 1) |
| 10240 | { |
| 10241 | if (!add_dynamic_entry (DT_PPC64_OPD, 0) |
| 10242 | || !add_dynamic_entry (DT_PPC64_OPDSZ, 0)) |
| 10243 | return FALSE; |
| 10244 | } |
| 10245 | |
| 10246 | tls_opt = (htab->params->tls_get_addr_opt |
| 10247 | && ((htab->tls_get_addr_fd != NULL |
| 10248 | && htab->tls_get_addr_fd->elf.plt.plist != NULL) |
| 10249 | || (htab->tga_desc_fd != NULL |
| 10250 | && htab->tga_desc_fd->elf.plt.plist != NULL))); |
| 10251 | if (tls_opt || !htab->opd_abi) |
| 10252 | { |
| 10253 | if (!add_dynamic_entry (DT_PPC64_OPT, tls_opt ? PPC64_OPT_TLS : 0)) |
| 10254 | return FALSE; |
| 10255 | } |
| 10256 | |
| 10257 | if (relocs) |
| 10258 | { |
| 10259 | if (!add_dynamic_entry (DT_RELA, 0) |
| 10260 | || !add_dynamic_entry (DT_RELASZ, 0) |
| 10261 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela))) |
| 10262 | return FALSE; |
| 10263 | |
| 10264 | /* If any dynamic relocs apply to a read-only section, |
| 10265 | then we need a DT_TEXTREL entry. */ |
| 10266 | if ((info->flags & DF_TEXTREL) == 0) |
| 10267 | elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info); |
| 10268 | |
| 10269 | if ((info->flags & DF_TEXTREL) != 0) |
| 10270 | { |
| 10271 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
| 10272 | return FALSE; |
| 10273 | } |
| 10274 | } |
| 10275 | } |
| 10276 | #undef add_dynamic_entry |
| 10277 | |
| 10278 | return TRUE; |
| 10279 | } |
| 10280 | |
| 10281 | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ |
| 10282 | |
| 10283 | static bfd_boolean |
| 10284 | ppc64_elf_hash_symbol (struct elf_link_hash_entry *h) |
| 10285 | { |
| 10286 | if (h->plt.plist != NULL |
| 10287 | && !h->def_regular |
| 10288 | && !h->pointer_equality_needed) |
| 10289 | return FALSE; |
| 10290 | |
| 10291 | return _bfd_elf_hash_symbol (h); |
| 10292 | } |
| 10293 | |
| 10294 | /* Determine the type of stub needed, if any, for a call. */ |
| 10295 | |
| 10296 | static inline enum ppc_stub_type |
| 10297 | ppc_type_of_stub (asection *input_sec, |
| 10298 | const Elf_Internal_Rela *rel, |
| 10299 | struct ppc_link_hash_entry **hash, |
| 10300 | struct plt_entry **plt_ent, |
| 10301 | bfd_vma destination, |
| 10302 | unsigned long local_off) |
| 10303 | { |
| 10304 | struct ppc_link_hash_entry *h = *hash; |
| 10305 | bfd_vma location; |
| 10306 | bfd_vma branch_offset; |
| 10307 | bfd_vma max_branch_offset; |
| 10308 | enum elf_ppc64_reloc_type r_type; |
| 10309 | |
| 10310 | if (h != NULL) |
| 10311 | { |
| 10312 | struct plt_entry *ent; |
| 10313 | struct ppc_link_hash_entry *fdh = h; |
| 10314 | if (h->oh != NULL |
| 10315 | && h->oh->is_func_descriptor) |
| 10316 | { |
| 10317 | fdh = ppc_follow_link (h->oh); |
| 10318 | *hash = fdh; |
| 10319 | } |
| 10320 | |
| 10321 | for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next) |
| 10322 | if (ent->addend == rel->r_addend |
| 10323 | && ent->plt.offset != (bfd_vma) -1) |
| 10324 | { |
| 10325 | *plt_ent = ent; |
| 10326 | return ppc_stub_plt_call; |
| 10327 | } |
| 10328 | |
| 10329 | /* Here, we know we don't have a plt entry. If we don't have a |
| 10330 | either a defined function descriptor or a defined entry symbol |
| 10331 | in a regular object file, then it is pointless trying to make |
| 10332 | any other type of stub. */ |
| 10333 | if (!is_static_defined (&fdh->elf) |
| 10334 | && !is_static_defined (&h->elf)) |
| 10335 | return ppc_stub_none; |
| 10336 | } |
| 10337 | else if (elf_local_got_ents (input_sec->owner) != NULL) |
| 10338 | { |
| 10339 | Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner); |
| 10340 | struct plt_entry **local_plt = (struct plt_entry **) |
| 10341 | elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info; |
| 10342 | unsigned long r_symndx = ELF64_R_SYM (rel->r_info); |
| 10343 | |
| 10344 | if (local_plt[r_symndx] != NULL) |
| 10345 | { |
| 10346 | struct plt_entry *ent; |
| 10347 | |
| 10348 | for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next) |
| 10349 | if (ent->addend == rel->r_addend |
| 10350 | && ent->plt.offset != (bfd_vma) -1) |
| 10351 | { |
| 10352 | *plt_ent = ent; |
| 10353 | return ppc_stub_plt_call; |
| 10354 | } |
| 10355 | } |
| 10356 | } |
| 10357 | |
| 10358 | /* Determine where the call point is. */ |
| 10359 | location = (input_sec->output_offset |
| 10360 | + input_sec->output_section->vma |
| 10361 | + rel->r_offset); |
| 10362 | |
| 10363 | branch_offset = destination - location; |
| 10364 | r_type = ELF64_R_TYPE (rel->r_info); |
| 10365 | |
| 10366 | /* Determine if a long branch stub is needed. */ |
| 10367 | max_branch_offset = 1 << 25; |
| 10368 | if (r_type == R_PPC64_REL14 |
| 10369 | || r_type == R_PPC64_REL14_BRTAKEN |
| 10370 | || r_type == R_PPC64_REL14_BRNTAKEN) |
| 10371 | max_branch_offset = 1 << 15; |
| 10372 | |
| 10373 | if (branch_offset + max_branch_offset >= 2 * max_branch_offset - local_off) |
| 10374 | /* We need a stub. Figure out whether a long_branch or plt_branch |
| 10375 | is needed later. */ |
| 10376 | return ppc_stub_long_branch; |
| 10377 | |
| 10378 | return ppc_stub_none; |
| 10379 | } |
| 10380 | |
| 10381 | /* Gets the address of a label (1:) in r11 and builds an offset in r12, |
| 10382 | then adds it to r11 (LOAD false) or loads r12 from r11+r12 (LOAD true). |
| 10383 | . mflr %r12 |
| 10384 | . bcl 20,31,1f |
| 10385 | .1: mflr %r11 |
| 10386 | . mtlr %r12 |
| 10387 | . lis %r12,xxx-1b@highest |
| 10388 | . ori %r12,%r12,xxx-1b@higher |
| 10389 | . sldi %r12,%r12,32 |
| 10390 | . oris %r12,%r12,xxx-1b@high |
| 10391 | . ori %r12,%r12,xxx-1b@l |
| 10392 | . add/ldx %r12,%r11,%r12 */ |
| 10393 | |
| 10394 | static bfd_byte * |
| 10395 | build_offset (bfd *abfd, bfd_byte *p, bfd_vma off, bfd_boolean load) |
| 10396 | { |
| 10397 | bfd_put_32 (abfd, MFLR_R12, p); |
| 10398 | p += 4; |
| 10399 | bfd_put_32 (abfd, BCL_20_31, p); |
| 10400 | p += 4; |
| 10401 | bfd_put_32 (abfd, MFLR_R11, p); |
| 10402 | p += 4; |
| 10403 | bfd_put_32 (abfd, MTLR_R12, p); |
| 10404 | p += 4; |
| 10405 | if (off + 0x8000 < 0x10000) |
| 10406 | { |
| 10407 | if (load) |
| 10408 | bfd_put_32 (abfd, LD_R12_0R11 + PPC_LO (off), p); |
| 10409 | else |
| 10410 | bfd_put_32 (abfd, ADDI_R12_R11 + PPC_LO (off), p); |
| 10411 | p += 4; |
| 10412 | } |
| 10413 | else if (off + 0x80008000ULL < 0x100000000ULL) |
| 10414 | { |
| 10415 | bfd_put_32 (abfd, ADDIS_R12_R11 + PPC_HA (off), p); |
| 10416 | p += 4; |
| 10417 | if (load) |
| 10418 | bfd_put_32 (abfd, LD_R12_0R12 + PPC_LO (off), p); |
| 10419 | else |
| 10420 | bfd_put_32 (abfd, ADDI_R12_R12 + PPC_LO (off), p); |
| 10421 | p += 4; |
| 10422 | } |
| 10423 | else |
| 10424 | { |
| 10425 | if (off + 0x800000000000ULL < 0x1000000000000ULL) |
| 10426 | { |
| 10427 | bfd_put_32 (abfd, LI_R12_0 + ((off >> 32) & 0xffff), p); |
| 10428 | p += 4; |
| 10429 | } |
| 10430 | else |
| 10431 | { |
| 10432 | bfd_put_32 (abfd, LIS_R12 + ((off >> 48) & 0xffff), p); |
| 10433 | p += 4; |
| 10434 | if (((off >> 32) & 0xffff) != 0) |
| 10435 | { |
| 10436 | bfd_put_32 (abfd, ORI_R12_R12_0 + ((off >> 32) & 0xffff), p); |
| 10437 | p += 4; |
| 10438 | } |
| 10439 | } |
| 10440 | if (((off >> 32) & 0xffffffffULL) != 0) |
| 10441 | { |
| 10442 | bfd_put_32 (abfd, SLDI_R12_R12_32, p); |
| 10443 | p += 4; |
| 10444 | } |
| 10445 | if (PPC_HI (off) != 0) |
| 10446 | { |
| 10447 | bfd_put_32 (abfd, ORIS_R12_R12_0 + PPC_HI (off), p); |
| 10448 | p += 4; |
| 10449 | } |
| 10450 | if (PPC_LO (off) != 0) |
| 10451 | { |
| 10452 | bfd_put_32 (abfd, ORI_R12_R12_0 + PPC_LO (off), p); |
| 10453 | p += 4; |
| 10454 | } |
| 10455 | if (load) |
| 10456 | bfd_put_32 (abfd, LDX_R12_R11_R12, p); |
| 10457 | else |
| 10458 | bfd_put_32 (abfd, ADD_R12_R11_R12, p); |
| 10459 | p += 4; |
| 10460 | } |
| 10461 | return p; |
| 10462 | } |
| 10463 | |
| 10464 | static unsigned int |
| 10465 | size_offset (bfd_vma off) |
| 10466 | { |
| 10467 | unsigned int size; |
| 10468 | if (off + 0x8000 < 0x10000) |
| 10469 | size = 4; |
| 10470 | else if (off + 0x80008000ULL < 0x100000000ULL) |
| 10471 | size = 8; |
| 10472 | else |
| 10473 | { |
| 10474 | if (off + 0x800000000000ULL < 0x1000000000000ULL) |
| 10475 | size = 4; |
| 10476 | else |
| 10477 | { |
| 10478 | size = 4; |
| 10479 | if (((off >> 32) & 0xffff) != 0) |
| 10480 | size += 4; |
| 10481 | } |
| 10482 | if (((off >> 32) & 0xffffffffULL) != 0) |
| 10483 | size += 4; |
| 10484 | if (PPC_HI (off) != 0) |
| 10485 | size += 4; |
| 10486 | if (PPC_LO (off) != 0) |
| 10487 | size += 4; |
| 10488 | size += 4; |
| 10489 | } |
| 10490 | return size + 16; |
| 10491 | } |
| 10492 | |
| 10493 | static unsigned int |
| 10494 | num_relocs_for_offset (bfd_vma off) |
| 10495 | { |
| 10496 | unsigned int num_rel; |
| 10497 | if (off + 0x8000 < 0x10000) |
| 10498 | num_rel = 1; |
| 10499 | else if (off + 0x80008000ULL < 0x100000000ULL) |
| 10500 | num_rel = 2; |
| 10501 | else |
| 10502 | { |
| 10503 | num_rel = 1; |
| 10504 | if (off + 0x800000000000ULL >= 0x1000000000000ULL |
| 10505 | && ((off >> 32) & 0xffff) != 0) |
| 10506 | num_rel += 1; |
| 10507 | if (PPC_HI (off) != 0) |
| 10508 | num_rel += 1; |
| 10509 | if (PPC_LO (off) != 0) |
| 10510 | num_rel += 1; |
| 10511 | } |
| 10512 | return num_rel; |
| 10513 | } |
| 10514 | |
| 10515 | static Elf_Internal_Rela * |
| 10516 | emit_relocs_for_offset (struct bfd_link_info *info, Elf_Internal_Rela *r, |
| 10517 | bfd_vma roff, bfd_vma targ, bfd_vma off) |
| 10518 | { |
| 10519 | bfd_vma relative_targ = targ - (roff - 8); |
| 10520 | if (bfd_big_endian (info->output_bfd)) |
| 10521 | roff += 2; |
| 10522 | r->r_offset = roff; |
| 10523 | r->r_addend = relative_targ + roff; |
| 10524 | if (off + 0x8000 < 0x10000) |
| 10525 | r->r_info = ELF64_R_INFO (0, R_PPC64_REL16); |
| 10526 | else if (off + 0x80008000ULL < 0x100000000ULL) |
| 10527 | { |
| 10528 | r->r_info = ELF64_R_INFO (0, R_PPC64_REL16_HA); |
| 10529 | ++r; |
| 10530 | roff += 4; |
| 10531 | r->r_offset = roff; |
| 10532 | r->r_info = ELF64_R_INFO (0, R_PPC64_REL16_LO); |
| 10533 | r->r_addend = relative_targ + roff; |
| 10534 | } |
| 10535 | else |
| 10536 | { |
| 10537 | if (off + 0x800000000000ULL < 0x1000000000000ULL) |
| 10538 | r->r_info = ELF64_R_INFO (0, R_PPC64_REL16_HIGHER); |
| 10539 | else |
| 10540 | { |
| 10541 | r->r_info = ELF64_R_INFO (0, R_PPC64_REL16_HIGHEST); |
| 10542 | if (((off >> 32) & 0xffff) != 0) |
| 10543 | { |
| 10544 | ++r; |
| 10545 | roff += 4; |
| 10546 | r->r_offset = roff; |
| 10547 | r->r_info = ELF64_R_INFO (0, R_PPC64_REL16_HIGHER); |
| 10548 | r->r_addend = relative_targ + roff; |
| 10549 | } |
| 10550 | } |
| 10551 | if (((off >> 32) & 0xffffffffULL) != 0) |
| 10552 | roff += 4; |
| 10553 | if (PPC_HI (off) != 0) |
| 10554 | { |
| 10555 | ++r; |
| 10556 | roff += 4; |
| 10557 | r->r_offset = roff; |
| 10558 | r->r_info = ELF64_R_INFO (0, R_PPC64_REL16_HIGH); |
| 10559 | r->r_addend = relative_targ + roff; |
| 10560 | } |
| 10561 | if (PPC_LO (off) != 0) |
| 10562 | { |
| 10563 | ++r; |
| 10564 | roff += 4; |
| 10565 | r->r_offset = roff; |
| 10566 | r->r_info = ELF64_R_INFO (0, R_PPC64_REL16_LO); |
| 10567 | r->r_addend = relative_targ + roff; |
| 10568 | } |
| 10569 | } |
| 10570 | return r; |
| 10571 | } |
| 10572 | |
| 10573 | static bfd_byte * |
| 10574 | build_power10_offset (bfd *abfd, bfd_byte *p, bfd_vma off, int odd, |
| 10575 | bfd_boolean load) |
| 10576 | { |
| 10577 | uint64_t insn; |
| 10578 | if (off - odd + (1ULL << 33) < 1ULL << 34) |
| 10579 | { |
| 10580 | off -= odd; |
| 10581 | if (odd) |
| 10582 | { |
| 10583 | bfd_put_32 (abfd, NOP, p); |
| 10584 | p += 4; |
| 10585 | } |
| 10586 | if (load) |
| 10587 | insn = PLD_R12_PC; |
| 10588 | else |
| 10589 | insn = PADDI_R12_PC; |
| 10590 | insn |= D34 (off); |
| 10591 | bfd_put_32 (abfd, insn >> 32, p); |
| 10592 | p += 4; |
| 10593 | bfd_put_32 (abfd, insn, p); |
| 10594 | } |
| 10595 | /* The minimum value for paddi is -0x200000000. The minimum value |
| 10596 | for li is -0x8000, which when shifted by 34 and added gives a |
| 10597 | minimum value of -0x2000200000000. The maximum value is |
| 10598 | 0x1ffffffff+0x7fff<<34 which is 0x2000200000000-1. */ |
| 10599 | else if (off - (8 - odd) + (0x20002ULL << 32) < 0x40004ULL << 32) |
| 10600 | { |
| 10601 | off -= 8 - odd; |
| 10602 | bfd_put_32 (abfd, LI_R11_0 | (HA34 (off) & 0xffff), p); |
| 10603 | p += 4; |
| 10604 | if (!odd) |
| 10605 | { |
| 10606 | bfd_put_32 (abfd, SLDI_R11_R11_34, p); |
| 10607 | p += 4; |
| 10608 | } |
| 10609 | insn = PADDI_R12_PC | D34 (off); |
| 10610 | bfd_put_32 (abfd, insn >> 32, p); |
| 10611 | p += 4; |
| 10612 | bfd_put_32 (abfd, insn, p); |
| 10613 | p += 4; |
| 10614 | if (odd) |
| 10615 | { |
| 10616 | bfd_put_32 (abfd, SLDI_R11_R11_34, p); |
| 10617 | p += 4; |
| 10618 | } |
| 10619 | if (load) |
| 10620 | bfd_put_32 (abfd, LDX_R12_R11_R12, p); |
| 10621 | else |
| 10622 | bfd_put_32 (abfd, ADD_R12_R11_R12, p); |
| 10623 | } |
| 10624 | else |
| 10625 | { |
| 10626 | off -= odd + 8; |
| 10627 | bfd_put_32 (abfd, LIS_R11 | ((HA34 (off) >> 16) & 0x3fff), p); |
| 10628 | p += 4; |
| 10629 | bfd_put_32 (abfd, ORI_R11_R11_0 | (HA34 (off) & 0xffff), p); |
| 10630 | p += 4; |
| 10631 | if (odd) |
| 10632 | { |
| 10633 | bfd_put_32 (abfd, SLDI_R11_R11_34, p); |
| 10634 | p += 4; |
| 10635 | } |
| 10636 | insn = PADDI_R12_PC | D34 (off); |
| 10637 | bfd_put_32 (abfd, insn >> 32, p); |
| 10638 | p += 4; |
| 10639 | bfd_put_32 (abfd, insn, p); |
| 10640 | p += 4; |
| 10641 | if (!odd) |
| 10642 | { |
| 10643 | bfd_put_32 (abfd, SLDI_R11_R11_34, p); |
| 10644 | p += 4; |
| 10645 | } |
| 10646 | if (load) |
| 10647 | bfd_put_32 (abfd, LDX_R12_R11_R12, p); |
| 10648 | else |
| 10649 | bfd_put_32 (abfd, ADD_R12_R11_R12, p); |
| 10650 | } |
| 10651 | p += 4; |
| 10652 | return p; |
| 10653 | } |
| 10654 | |
| 10655 | static unsigned int |
| 10656 | size_power10_offset (bfd_vma off, int odd) |
| 10657 | { |
| 10658 | if (off - odd + (1ULL << 33) < 1ULL << 34) |
| 10659 | return odd + 8; |
| 10660 | else if (off - (8 - odd) + (0x20002ULL << 32) < 0x40004ULL << 32) |
| 10661 | return 20; |
| 10662 | else |
| 10663 | return 24; |
| 10664 | } |
| 10665 | |
| 10666 | static unsigned int |
| 10667 | num_relocs_for_power10_offset (bfd_vma off, int odd) |
| 10668 | { |
| 10669 | if (off - odd + (1ULL << 33) < 1ULL << 34) |
| 10670 | return 1; |
| 10671 | else if (off - (8 - odd) + (0x20002ULL << 32) < 0x40004ULL << 32) |
| 10672 | return 2; |
| 10673 | else |
| 10674 | return 3; |
| 10675 | } |
| 10676 | |
| 10677 | static Elf_Internal_Rela * |
| 10678 | emit_relocs_for_power10_offset (struct bfd_link_info *info, |
| 10679 | Elf_Internal_Rela *r, bfd_vma roff, |
| 10680 | bfd_vma targ, bfd_vma off, int odd) |
| 10681 | { |
| 10682 | if (off - odd + (1ULL << 33) < 1ULL << 34) |
| 10683 | roff += odd; |
| 10684 | else if (off - (8 - odd) + (0x20002ULL << 32) < 0x40004ULL << 32) |
| 10685 | { |
| 10686 | int d_offset = bfd_big_endian (info->output_bfd) ? 2 : 0; |
| 10687 | r->r_offset = roff + d_offset; |
| 10688 | r->r_addend = targ + 8 - odd - d_offset; |
| 10689 | r->r_info = ELF64_R_INFO (0, R_PPC64_REL16_HIGHERA34); |
| 10690 | ++r; |
| 10691 | roff += 8 - odd; |
| 10692 | } |
| 10693 | else |
| 10694 | { |
| 10695 | int d_offset = bfd_big_endian (info->output_bfd) ? 2 : 0; |
| 10696 | r->r_offset = roff + d_offset; |
| 10697 | r->r_addend = targ + 8 + odd - d_offset; |
| 10698 | r->r_info = ELF64_R_INFO (0, R_PPC64_REL16_HIGHESTA34); |
| 10699 | ++r; |
| 10700 | roff += 4; |
| 10701 | r->r_offset = roff + d_offset; |
| 10702 | r->r_addend = targ + 4 + odd - d_offset; |
| 10703 | r->r_info = ELF64_R_INFO (0, R_PPC64_REL16_HIGHERA34); |
| 10704 | ++r; |
| 10705 | roff += 4 + odd; |
| 10706 | } |
| 10707 | r->r_offset = roff; |
| 10708 | r->r_addend = targ; |
| 10709 | r->r_info = ELF64_R_INFO (0, R_PPC64_PCREL34); |
| 10710 | return r; |
| 10711 | } |
| 10712 | |
| 10713 | /* Emit .eh_frame opcode to advance pc by DELTA. */ |
| 10714 | |
| 10715 | static bfd_byte * |
| 10716 | eh_advance (bfd *abfd, bfd_byte *eh, unsigned int delta) |
| 10717 | { |
| 10718 | delta /= 4; |
| 10719 | if (delta < 64) |
| 10720 | *eh++ = DW_CFA_advance_loc + delta; |
| 10721 | else if (delta < 256) |
| 10722 | { |
| 10723 | *eh++ = DW_CFA_advance_loc1; |
| 10724 | *eh++ = delta; |
| 10725 | } |
| 10726 | else if (delta < 65536) |
| 10727 | { |
| 10728 | *eh++ = DW_CFA_advance_loc2; |
| 10729 | bfd_put_16 (abfd, delta, eh); |
| 10730 | eh += 2; |
| 10731 | } |
| 10732 | else |
| 10733 | { |
| 10734 | *eh++ = DW_CFA_advance_loc4; |
| 10735 | bfd_put_32 (abfd, delta, eh); |
| 10736 | eh += 4; |
| 10737 | } |
| 10738 | return eh; |
| 10739 | } |
| 10740 | |
| 10741 | /* Size of required .eh_frame opcode to advance pc by DELTA. */ |
| 10742 | |
| 10743 | static unsigned int |
| 10744 | eh_advance_size (unsigned int delta) |
| 10745 | { |
| 10746 | if (delta < 64 * 4) |
| 10747 | /* DW_CFA_advance_loc+[1..63]. */ |
| 10748 | return 1; |
| 10749 | if (delta < 256 * 4) |
| 10750 | /* DW_CFA_advance_loc1, byte. */ |
| 10751 | return 2; |
| 10752 | if (delta < 65536 * 4) |
| 10753 | /* DW_CFA_advance_loc2, 2 bytes. */ |
| 10754 | return 3; |
| 10755 | /* DW_CFA_advance_loc4, 4 bytes. */ |
| 10756 | return 5; |
| 10757 | } |
| 10758 | |
| 10759 | /* With power7 weakly ordered memory model, it is possible for ld.so |
| 10760 | to update a plt entry in one thread and have another thread see a |
| 10761 | stale zero toc entry. To avoid this we need some sort of acquire |
| 10762 | barrier in the call stub. One solution is to make the load of the |
| 10763 | toc word seem to appear to depend on the load of the function entry |
| 10764 | word. Another solution is to test for r2 being zero, and branch to |
| 10765 | the appropriate glink entry if so. |
| 10766 | |
| 10767 | . fake dep barrier compare |
| 10768 | . ld 12,xxx(2) ld 12,xxx(2) |
| 10769 | . mtctr 12 mtctr 12 |
| 10770 | . xor 11,12,12 ld 2,xxx+8(2) |
| 10771 | . add 2,2,11 cmpldi 2,0 |
| 10772 | . ld 2,xxx+8(2) bnectr+ |
| 10773 | . bctr b <glink_entry> |
| 10774 | |
| 10775 | The solution involving the compare turns out to be faster, so |
| 10776 | that's what we use unless the branch won't reach. */ |
| 10777 | |
| 10778 | #define ALWAYS_USE_FAKE_DEP 0 |
| 10779 | #define ALWAYS_EMIT_R2SAVE 0 |
| 10780 | |
| 10781 | static inline unsigned int |
| 10782 | plt_stub_size (struct ppc_link_hash_table *htab, |
| 10783 | struct ppc_stub_hash_entry *stub_entry, |
| 10784 | bfd_vma off) |
| 10785 | { |
| 10786 | unsigned size; |
| 10787 | |
| 10788 | if (stub_entry->stub_type >= ppc_stub_plt_call_notoc) |
| 10789 | { |
| 10790 | if (htab->power10_stubs) |
| 10791 | { |
| 10792 | bfd_vma start = (stub_entry->stub_offset |
| 10793 | + stub_entry->group->stub_sec->output_offset |
| 10794 | + stub_entry->group->stub_sec->output_section->vma); |
| 10795 | if (stub_entry->stub_type > ppc_stub_plt_call_notoc) |
| 10796 | start += 4; |
| 10797 | size = 8 + size_power10_offset (off, start & 4); |
| 10798 | } |
| 10799 | else |
| 10800 | size = 8 + size_offset (off - 8); |
| 10801 | if (stub_entry->stub_type > ppc_stub_plt_call_notoc) |
| 10802 | size += 4; |
| 10803 | return size; |
| 10804 | } |
| 10805 | |
| 10806 | size = 12; |
| 10807 | if (ALWAYS_EMIT_R2SAVE |
| 10808 | || stub_entry->stub_type == ppc_stub_plt_call_r2save) |
| 10809 | size += 4; |
| 10810 | if (PPC_HA (off) != 0) |
| 10811 | size += 4; |
| 10812 | if (htab->opd_abi) |
| 10813 | { |
| 10814 | size += 4; |
| 10815 | if (htab->params->plt_static_chain) |
| 10816 | size += 4; |
| 10817 | if (htab->params->plt_thread_safe |
| 10818 | && htab->elf.dynamic_sections_created |
| 10819 | && stub_entry->h != NULL |
| 10820 | && stub_entry->h->elf.dynindx != -1) |
| 10821 | size += 8; |
| 10822 | if (PPC_HA (off + 8 + 8 * htab->params->plt_static_chain) != PPC_HA (off)) |
| 10823 | size += 4; |
| 10824 | } |
| 10825 | if (stub_entry->h != NULL |
| 10826 | && is_tls_get_addr (&stub_entry->h->elf, htab) |
| 10827 | && htab->params->tls_get_addr_opt) |
| 10828 | { |
| 10829 | if (htab->params->no_tls_get_addr_regsave) |
| 10830 | { |
| 10831 | size += 7 * 4; |
| 10832 | if (stub_entry->stub_type == ppc_stub_plt_call_r2save) |
| 10833 | size += 6 * 4; |
| 10834 | } |
| 10835 | else |
| 10836 | { |
| 10837 | size += 30 * 4; |
| 10838 | if (stub_entry->stub_type == ppc_stub_plt_call_r2save) |
| 10839 | size += 4; |
| 10840 | } |
| 10841 | } |
| 10842 | return size; |
| 10843 | } |
| 10844 | |
| 10845 | /* Depending on the sign of plt_stub_align: |
| 10846 | If positive, return the padding to align to a 2**plt_stub_align |
| 10847 | boundary. |
| 10848 | If negative, if this stub would cross fewer 2**plt_stub_align |
| 10849 | boundaries if we align, then return the padding needed to do so. */ |
| 10850 | |
| 10851 | static inline unsigned int |
| 10852 | plt_stub_pad (struct ppc_link_hash_table *htab, |
| 10853 | struct ppc_stub_hash_entry *stub_entry, |
| 10854 | bfd_vma plt_off) |
| 10855 | { |
| 10856 | int stub_align; |
| 10857 | unsigned stub_size; |
| 10858 | bfd_vma stub_off = stub_entry->group->stub_sec->size; |
| 10859 | |
| 10860 | if (htab->params->plt_stub_align >= 0) |
| 10861 | { |
| 10862 | stub_align = 1 << htab->params->plt_stub_align; |
| 10863 | if ((stub_off & (stub_align - 1)) != 0) |
| 10864 | return stub_align - (stub_off & (stub_align - 1)); |
| 10865 | return 0; |
| 10866 | } |
| 10867 | |
| 10868 | stub_align = 1 << -htab->params->plt_stub_align; |
| 10869 | stub_size = plt_stub_size (htab, stub_entry, plt_off); |
| 10870 | if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align) |
| 10871 | > ((stub_size - 1) & -stub_align)) |
| 10872 | return stub_align - (stub_off & (stub_align - 1)); |
| 10873 | return 0; |
| 10874 | } |
| 10875 | |
| 10876 | /* Build a .plt call stub. */ |
| 10877 | |
| 10878 | static inline bfd_byte * |
| 10879 | build_plt_stub (struct ppc_link_hash_table *htab, |
| 10880 | struct ppc_stub_hash_entry *stub_entry, |
| 10881 | bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r) |
| 10882 | { |
| 10883 | bfd *obfd = htab->params->stub_bfd; |
| 10884 | bfd_boolean plt_load_toc = htab->opd_abi; |
| 10885 | bfd_boolean plt_static_chain = htab->params->plt_static_chain; |
| 10886 | bfd_boolean plt_thread_safe = (htab->params->plt_thread_safe |
| 10887 | && htab->elf.dynamic_sections_created |
| 10888 | && stub_entry->h != NULL |
| 10889 | && stub_entry->h->elf.dynindx != -1); |
| 10890 | bfd_boolean use_fake_dep = plt_thread_safe; |
| 10891 | bfd_vma cmp_branch_off = 0; |
| 10892 | |
| 10893 | if (!ALWAYS_USE_FAKE_DEP |
| 10894 | && plt_load_toc |
| 10895 | && plt_thread_safe |
| 10896 | && !(is_tls_get_addr (&stub_entry->h->elf, htab) |
| 10897 | && htab->params->tls_get_addr_opt)) |
| 10898 | { |
| 10899 | bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1; |
| 10900 | bfd_vma pltindex = ((pltoff - PLT_INITIAL_ENTRY_SIZE (htab)) |
| 10901 | / PLT_ENTRY_SIZE (htab)); |
| 10902 | bfd_vma glinkoff = GLINK_PLTRESOLVE_SIZE (htab) + pltindex * 8; |
| 10903 | bfd_vma to, from; |
| 10904 | |
| 10905 | if (pltindex > 32768) |
| 10906 | glinkoff += (pltindex - 32768) * 4; |
| 10907 | to = (glinkoff |
| 10908 | + htab->glink->output_offset |
| 10909 | + htab->glink->output_section->vma); |
| 10910 | from = (p - stub_entry->group->stub_sec->contents |
| 10911 | + 4 * (ALWAYS_EMIT_R2SAVE |
| 10912 | || stub_entry->stub_type == ppc_stub_plt_call_r2save) |
| 10913 | + 4 * (PPC_HA (offset) != 0) |
| 10914 | + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain) |
| 10915 | != PPC_HA (offset)) |
| 10916 | + 4 * (plt_static_chain != 0) |
| 10917 | + 20 |
| 10918 | + stub_entry->group->stub_sec->output_offset |
| 10919 | + stub_entry->group->stub_sec->output_section->vma); |
| 10920 | cmp_branch_off = to - from; |
| 10921 | use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26); |
| 10922 | } |
| 10923 | |
| 10924 | if (PPC_HA (offset) != 0) |
| 10925 | { |
| 10926 | if (r != NULL) |
| 10927 | { |
| 10928 | if (ALWAYS_EMIT_R2SAVE |
| 10929 | || stub_entry->stub_type == ppc_stub_plt_call_r2save) |
| 10930 | r[0].r_offset += 4; |
| 10931 | r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA); |
| 10932 | r[1].r_offset = r[0].r_offset + 4; |
| 10933 | r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS); |
| 10934 | r[1].r_addend = r[0].r_addend; |
| 10935 | if (plt_load_toc) |
| 10936 | { |
| 10937 | if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset)) |
| 10938 | { |
| 10939 | r[2].r_offset = r[1].r_offset + 4; |
| 10940 | r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO); |
| 10941 | r[2].r_addend = r[0].r_addend; |
| 10942 | } |
| 10943 | else |
| 10944 | { |
| 10945 | r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep; |
| 10946 | r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS); |
| 10947 | r[2].r_addend = r[0].r_addend + 8; |
| 10948 | if (plt_static_chain) |
| 10949 | { |
| 10950 | r[3].r_offset = r[2].r_offset + 4; |
| 10951 | r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS); |
| 10952 | r[3].r_addend = r[0].r_addend + 16; |
| 10953 | } |
| 10954 | } |
| 10955 | } |
| 10956 | } |
| 10957 | if (ALWAYS_EMIT_R2SAVE |
| 10958 | || stub_entry->stub_type == ppc_stub_plt_call_r2save) |
| 10959 | bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4; |
| 10960 | if (plt_load_toc) |
| 10961 | { |
| 10962 | bfd_put_32 (obfd, ADDIS_R11_R2 | PPC_HA (offset), p), p += 4; |
| 10963 | bfd_put_32 (obfd, LD_R12_0R11 | PPC_LO (offset), p), p += 4; |
| 10964 | } |
| 10965 | else |
| 10966 | { |
| 10967 | bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4; |
| 10968 | bfd_put_32 (obfd, LD_R12_0R12 | PPC_LO (offset), p), p += 4; |
| 10969 | } |
| 10970 | if (plt_load_toc |
| 10971 | && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset)) |
| 10972 | { |
| 10973 | bfd_put_32 (obfd, ADDI_R11_R11 | PPC_LO (offset), p), p += 4; |
| 10974 | offset = 0; |
| 10975 | } |
| 10976 | bfd_put_32 (obfd, MTCTR_R12, p), p += 4; |
| 10977 | if (plt_load_toc) |
| 10978 | { |
| 10979 | if (use_fake_dep) |
| 10980 | { |
| 10981 | bfd_put_32 (obfd, XOR_R2_R12_R12, p), p += 4; |
| 10982 | bfd_put_32 (obfd, ADD_R11_R11_R2, p), p += 4; |
| 10983 | } |
| 10984 | bfd_put_32 (obfd, LD_R2_0R11 | PPC_LO (offset + 8), p), p += 4; |
| 10985 | if (plt_static_chain) |
| 10986 | bfd_put_32 (obfd, LD_R11_0R11 | PPC_LO (offset + 16), p), p += 4; |
| 10987 | } |
| 10988 | } |
| 10989 | else |
| 10990 | { |
| 10991 | if (r != NULL) |
| 10992 | { |
| 10993 | if (ALWAYS_EMIT_R2SAVE |
| 10994 | || stub_entry->stub_type == ppc_stub_plt_call_r2save) |
| 10995 | r[0].r_offset += 4; |
| 10996 | r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS); |
| 10997 | if (plt_load_toc) |
| 10998 | { |
| 10999 | if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset)) |
| 11000 | { |
| 11001 | r[1].r_offset = r[0].r_offset + 4; |
| 11002 | r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16); |
| 11003 | r[1].r_addend = r[0].r_addend; |
| 11004 | } |
| 11005 | else |
| 11006 | { |
| 11007 | r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep; |
| 11008 | r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS); |
| 11009 | r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain; |
| 11010 | if (plt_static_chain) |
| 11011 | { |
| 11012 | r[2].r_offset = r[1].r_offset + 4; |
| 11013 | r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS); |
| 11014 | r[2].r_addend = r[0].r_addend + 8; |
| 11015 | } |
| 11016 | } |
| 11017 | } |
| 11018 | } |
| 11019 | if (ALWAYS_EMIT_R2SAVE |
| 11020 | || stub_entry->stub_type == ppc_stub_plt_call_r2save) |
| 11021 | bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4; |
| 11022 | bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (offset), p), p += 4; |
| 11023 | if (plt_load_toc |
| 11024 | && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset)) |
| 11025 | { |
| 11026 | bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4; |
| 11027 | offset = 0; |
| 11028 | } |
| 11029 | bfd_put_32 (obfd, MTCTR_R12, p), p += 4; |
| 11030 | if (plt_load_toc) |
| 11031 | { |
| 11032 | if (use_fake_dep) |
| 11033 | { |
| 11034 | bfd_put_32 (obfd, XOR_R11_R12_R12, p), p += 4; |
| 11035 | bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4; |
| 11036 | } |
| 11037 | if (plt_static_chain) |
| 11038 | bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4; |
| 11039 | bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4; |
| 11040 | } |
| 11041 | } |
| 11042 | if (plt_load_toc && plt_thread_safe && !use_fake_dep) |
| 11043 | { |
| 11044 | bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4; |
| 11045 | bfd_put_32 (obfd, BNECTR_P4, p), p += 4; |
| 11046 | bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4; |
| 11047 | } |
| 11048 | else |
| 11049 | bfd_put_32 (obfd, BCTR, p), p += 4; |
| 11050 | return p; |
| 11051 | } |
| 11052 | |
| 11053 | /* Build a special .plt call stub for __tls_get_addr. */ |
| 11054 | |
| 11055 | #define LD_R0_0R3 0xe8030000 |
| 11056 | #define LD_R12_0R3 0xe9830000 |
| 11057 | #define MR_R0_R3 0x7c601b78 |
| 11058 | #define CMPDI_R0_0 0x2c200000 |
| 11059 | #define ADD_R3_R12_R13 0x7c6c6a14 |
| 11060 | #define BEQLR 0x4d820020 |
| 11061 | #define MR_R3_R0 0x7c030378 |
| 11062 | #define BCTRL 0x4e800421 |
| 11063 | |
| 11064 | static inline bfd_byte * |
| 11065 | build_tls_get_addr_stub (struct ppc_link_hash_table *htab, |
| 11066 | struct ppc_stub_hash_entry *stub_entry, |
| 11067 | bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r) |
| 11068 | { |
| 11069 | bfd *obfd = htab->params->stub_bfd; |
| 11070 | bfd_byte *loc = p; |
| 11071 | unsigned int i; |
| 11072 | |
| 11073 | bfd_put_32 (obfd, LD_R0_0R3 + 0, p), p += 4; |
| 11074 | bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4; |
| 11075 | bfd_put_32 (obfd, CMPDI_R0_0, p), p += 4; |
| 11076 | bfd_put_32 (obfd, MR_R0_R3, p), p += 4; |
| 11077 | bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4; |
| 11078 | bfd_put_32 (obfd, BEQLR, p), p += 4; |
| 11079 | bfd_put_32 (obfd, MR_R3_R0, p), p += 4; |
| 11080 | if (htab->params->no_tls_get_addr_regsave) |
| 11081 | { |
| 11082 | if (r != NULL) |
| 11083 | r[0].r_offset += 7 * 4; |
| 11084 | if (stub_entry->stub_type != ppc_stub_plt_call_r2save) |
| 11085 | return build_plt_stub (htab, stub_entry, p, offset, r); |
| 11086 | |
| 11087 | bfd_put_32 (obfd, MFLR_R0, p); |
| 11088 | p += 4; |
| 11089 | bfd_put_32 (obfd, STD_R0_0R1 + STK_LINKER (htab), p); |
| 11090 | p += 4; |
| 11091 | |
| 11092 | if (r != NULL) |
| 11093 | r[0].r_offset += 2 * 4; |
| 11094 | p = build_plt_stub (htab, stub_entry, p, offset, r); |
| 11095 | bfd_put_32 (obfd, BCTRL, p - 4); |
| 11096 | |
| 11097 | bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p); |
| 11098 | p += 4; |
| 11099 | bfd_put_32 (obfd, LD_R0_0R1 + STK_LINKER (htab), p); |
| 11100 | p += 4; |
| 11101 | bfd_put_32 (obfd, MTLR_R0, p); |
| 11102 | p += 4; |
| 11103 | bfd_put_32 (obfd, BLR, p); |
| 11104 | p += 4; |
| 11105 | } |
| 11106 | else |
| 11107 | { |
| 11108 | p = tls_get_addr_prologue (obfd, p, htab); |
| 11109 | |
| 11110 | if (r != NULL) |
| 11111 | r[0].r_offset += 18 * 4; |
| 11112 | |
| 11113 | p = build_plt_stub (htab, stub_entry, p, offset, r); |
| 11114 | bfd_put_32 (obfd, BCTRL, p - 4); |
| 11115 | |
| 11116 | if (stub_entry->stub_type == ppc_stub_plt_call_r2save) |
| 11117 | { |
| 11118 | bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p); |
| 11119 | p += 4; |
| 11120 | } |
| 11121 | |
| 11122 | p = tls_get_addr_epilogue (obfd, p, htab); |
| 11123 | } |
| 11124 | |
| 11125 | if (htab->glink_eh_frame != NULL |
| 11126 | && htab->glink_eh_frame->size != 0) |
| 11127 | { |
| 11128 | bfd_byte *base, *eh; |
| 11129 | |
| 11130 | base = htab->glink_eh_frame->contents + stub_entry->group->eh_base + 17; |
| 11131 | eh = base + stub_entry->group->eh_size; |
| 11132 | if (htab->params->no_tls_get_addr_regsave) |
| 11133 | { |
| 11134 | unsigned int lr_used, delta; |
| 11135 | lr_used = stub_entry->stub_offset + (p - 20 - loc); |
| 11136 | delta = lr_used - stub_entry->group->lr_restore; |
| 11137 | stub_entry->group->lr_restore = lr_used + 16; |
| 11138 | eh = eh_advance (htab->elf.dynobj, eh, delta); |
| 11139 | *eh++ = DW_CFA_offset_extended_sf; |
| 11140 | *eh++ = 65; |
| 11141 | *eh++ = -(STK_LINKER (htab) / 8) & 0x7f; |
| 11142 | *eh++ = DW_CFA_advance_loc + 4; |
| 11143 | } |
| 11144 | else |
| 11145 | { |
| 11146 | unsigned int cfa_updt, delta; |
| 11147 | /* After the bctrl, lr has been modified so we need to emit |
| 11148 | .eh_frame info saying the return address is on the stack. In |
| 11149 | fact we must put the EH info at or before the call rather |
| 11150 | than after it, because the EH info for a call needs to be |
| 11151 | specified by that point. |
| 11152 | See libgcc/unwind-dw2.c execute_cfa_program. |
| 11153 | Any stack pointer update must be described immediately after |
| 11154 | the instruction making the change, and since the stdu occurs |
| 11155 | after saving regs we put all the reg saves and the cfa |
| 11156 | change there. */ |
| 11157 | cfa_updt = stub_entry->stub_offset + 18 * 4; |
| 11158 | delta = cfa_updt - stub_entry->group->lr_restore; |
| 11159 | stub_entry->group->lr_restore |
| 11160 | = stub_entry->stub_offset + (p - loc) - 4; |
| 11161 | eh = eh_advance (htab->elf.dynobj, eh, delta); |
| 11162 | *eh++ = DW_CFA_def_cfa_offset; |
| 11163 | if (htab->opd_abi) |
| 11164 | { |
| 11165 | *eh++ = 128; |
| 11166 | *eh++ = 1; |
| 11167 | } |
| 11168 | else |
| 11169 | *eh++ = 96; |
| 11170 | *eh++ = DW_CFA_offset_extended_sf; |
| 11171 | *eh++ = 65; |
| 11172 | *eh++ = (-16 / 8) & 0x7f; |
| 11173 | for (i = 4; i < 12; i++) |
| 11174 | { |
| 11175 | *eh++ = DW_CFA_offset + i; |
| 11176 | *eh++ = (htab->opd_abi ? 13 : 12) - i; |
| 11177 | } |
| 11178 | *eh++ = (DW_CFA_advance_loc |
| 11179 | + (stub_entry->group->lr_restore - 8 - cfa_updt) / 4); |
| 11180 | *eh++ = DW_CFA_def_cfa_offset; |
| 11181 | *eh++ = 0; |
| 11182 | for (i = 4; i < 12; i++) |
| 11183 | *eh++ = DW_CFA_restore + i; |
| 11184 | *eh++ = DW_CFA_advance_loc + 2; |
| 11185 | } |
| 11186 | *eh++ = DW_CFA_restore_extended; |
| 11187 | *eh++ = 65; |
| 11188 | stub_entry->group->eh_size = eh - base; |
| 11189 | } |
| 11190 | return p; |
| 11191 | } |
| 11192 | |
| 11193 | static Elf_Internal_Rela * |
| 11194 | get_relocs (asection *sec, int count) |
| 11195 | { |
| 11196 | Elf_Internal_Rela *relocs; |
| 11197 | struct bfd_elf_section_data *elfsec_data; |
| 11198 | |
| 11199 | elfsec_data = elf_section_data (sec); |
| 11200 | relocs = elfsec_data->relocs; |
| 11201 | if (relocs == NULL) |
| 11202 | { |
| 11203 | bfd_size_type relsize; |
| 11204 | relsize = sec->reloc_count * sizeof (*relocs); |
| 11205 | relocs = bfd_alloc (sec->owner, relsize); |
| 11206 | if (relocs == NULL) |
| 11207 | return NULL; |
| 11208 | elfsec_data->relocs = relocs; |
| 11209 | elfsec_data->rela.hdr = bfd_zalloc (sec->owner, |
| 11210 | sizeof (Elf_Internal_Shdr)); |
| 11211 | if (elfsec_data->rela.hdr == NULL) |
| 11212 | return NULL; |
| 11213 | elfsec_data->rela.hdr->sh_size = (sec->reloc_count |
| 11214 | * sizeof (Elf64_External_Rela)); |
| 11215 | elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela); |
| 11216 | sec->reloc_count = 0; |
| 11217 | } |
| 11218 | relocs += sec->reloc_count; |
| 11219 | sec->reloc_count += count; |
| 11220 | return relocs; |
| 11221 | } |
| 11222 | |
| 11223 | /* Convert the relocs R[0] thru R[-NUM_REL+1], which are all no-symbol |
| 11224 | forms, to the equivalent relocs against the global symbol given by |
| 11225 | STUB_ENTRY->H. */ |
| 11226 | |
| 11227 | static bfd_boolean |
| 11228 | use_global_in_relocs (struct ppc_link_hash_table *htab, |
| 11229 | struct ppc_stub_hash_entry *stub_entry, |
| 11230 | Elf_Internal_Rela *r, unsigned int num_rel) |
| 11231 | { |
| 11232 | struct elf_link_hash_entry **hashes; |
| 11233 | unsigned long symndx; |
| 11234 | struct ppc_link_hash_entry *h; |
| 11235 | bfd_vma symval; |
| 11236 | |
| 11237 | /* Relocs are always against symbols in their own object file. Fake |
| 11238 | up global sym hashes for the stub bfd (which has no symbols). */ |
| 11239 | hashes = elf_sym_hashes (htab->params->stub_bfd); |
| 11240 | if (hashes == NULL) |
| 11241 | { |
| 11242 | bfd_size_type hsize; |
| 11243 | |
| 11244 | /* When called the first time, stub_globals will contain the |
| 11245 | total number of symbols seen during stub sizing. After |
| 11246 | allocating, stub_globals is used as an index to fill the |
| 11247 | hashes array. */ |
| 11248 | hsize = (htab->stub_globals + 1) * sizeof (*hashes); |
| 11249 | hashes = bfd_zalloc (htab->params->stub_bfd, hsize); |
| 11250 | if (hashes == NULL) |
| 11251 | return FALSE; |
| 11252 | elf_sym_hashes (htab->params->stub_bfd) = hashes; |
| 11253 | htab->stub_globals = 1; |
| 11254 | } |
| 11255 | symndx = htab->stub_globals++; |
| 11256 | h = stub_entry->h; |
| 11257 | hashes[symndx] = &h->elf; |
| 11258 | if (h->oh != NULL && h->oh->is_func) |
| 11259 | h = ppc_follow_link (h->oh); |
| 11260 | BFD_ASSERT (h->elf.root.type == bfd_link_hash_defined |
| 11261 | || h->elf.root.type == bfd_link_hash_defweak); |
| 11262 | symval = defined_sym_val (&h->elf); |
| 11263 | while (num_rel-- != 0) |
| 11264 | { |
| 11265 | r->r_info = ELF64_R_INFO (symndx, ELF64_R_TYPE (r->r_info)); |
| 11266 | if (h->elf.root.u.def.section != stub_entry->target_section) |
| 11267 | { |
| 11268 | /* H is an opd symbol. The addend must be zero, and the |
| 11269 | branch reloc is the only one we can convert. */ |
| 11270 | r->r_addend = 0; |
| 11271 | break; |
| 11272 | } |
| 11273 | else |
| 11274 | r->r_addend -= symval; |
| 11275 | --r; |
| 11276 | } |
| 11277 | return TRUE; |
| 11278 | } |
| 11279 | |
| 11280 | static bfd_vma |
| 11281 | get_r2off (struct bfd_link_info *info, |
| 11282 | struct ppc_stub_hash_entry *stub_entry) |
| 11283 | { |
| 11284 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
| 11285 | bfd_vma r2off = htab->sec_info[stub_entry->target_section->id].toc_off; |
| 11286 | |
| 11287 | if (r2off == 0) |
| 11288 | { |
| 11289 | /* Support linking -R objects. Get the toc pointer from the |
| 11290 | opd entry. */ |
| 11291 | char buf[8]; |
| 11292 | if (!htab->opd_abi) |
| 11293 | return r2off; |
| 11294 | asection *opd = stub_entry->h->elf.root.u.def.section; |
| 11295 | bfd_vma opd_off = stub_entry->h->elf.root.u.def.value; |
| 11296 | |
| 11297 | if (strcmp (opd->name, ".opd") != 0 |
| 11298 | || opd->reloc_count != 0) |
| 11299 | { |
| 11300 | info->callbacks->einfo |
| 11301 | (_("%P: cannot find opd entry toc for `%pT'\n"), |
| 11302 | stub_entry->h->elf.root.root.string); |
| 11303 | bfd_set_error (bfd_error_bad_value); |
| 11304 | return (bfd_vma) -1; |
| 11305 | } |
| 11306 | if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8)) |
| 11307 | return (bfd_vma) -1; |
| 11308 | r2off = bfd_get_64 (opd->owner, buf); |
| 11309 | r2off -= elf_gp (info->output_bfd); |
| 11310 | } |
| 11311 | r2off -= htab->sec_info[stub_entry->group->link_sec->id].toc_off; |
| 11312 | return r2off; |
| 11313 | } |
| 11314 | |
| 11315 | static bfd_boolean |
| 11316 | ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg) |
| 11317 | { |
| 11318 | struct ppc_stub_hash_entry *stub_entry; |
| 11319 | struct ppc_branch_hash_entry *br_entry; |
| 11320 | struct bfd_link_info *info; |
| 11321 | struct ppc_link_hash_table *htab; |
| 11322 | bfd_byte *loc; |
| 11323 | bfd_byte *p, *relp; |
| 11324 | bfd_vma targ, off; |
| 11325 | Elf_Internal_Rela *r; |
| 11326 | asection *plt; |
| 11327 | int num_rel; |
| 11328 | int odd; |
| 11329 | |
| 11330 | /* Massage our args to the form they really have. */ |
| 11331 | stub_entry = (struct ppc_stub_hash_entry *) gen_entry; |
| 11332 | info = in_arg; |
| 11333 | |
| 11334 | /* Fail if the target section could not be assigned to an output |
| 11335 | section. The user should fix his linker script. */ |
| 11336 | if (stub_entry->target_section != NULL |
| 11337 | && stub_entry->target_section->output_section == NULL |
| 11338 | && info->non_contiguous_regions) |
| 11339 | info->callbacks->einfo (_("%F%P: Could not assign '%pA' to an output section. " |
| 11340 | "Retry without --enable-non-contiguous-regions.\n"), |
| 11341 | stub_entry->target_section); |
| 11342 | |
| 11343 | /* Same for the group. */ |
| 11344 | if (stub_entry->group->stub_sec != NULL |
| 11345 | && stub_entry->group->stub_sec->output_section == NULL |
| 11346 | && info->non_contiguous_regions) |
| 11347 | info->callbacks->einfo (_("%F%P: Could not assign group %pA target %pA to an " |
| 11348 | "output section. Retry without " |
| 11349 | "--enable-non-contiguous-regions.\n"), |
| 11350 | stub_entry->group->stub_sec, |
| 11351 | stub_entry->target_section); |
| 11352 | |
| 11353 | htab = ppc_hash_table (info); |
| 11354 | if (htab == NULL) |
| 11355 | return FALSE; |
| 11356 | |
| 11357 | BFD_ASSERT (stub_entry->stub_offset >= stub_entry->group->stub_sec->size); |
| 11358 | loc = stub_entry->group->stub_sec->contents + stub_entry->stub_offset; |
| 11359 | |
| 11360 | htab->stub_count[stub_entry->stub_type - 1] += 1; |
| 11361 | switch (stub_entry->stub_type) |
| 11362 | { |
| 11363 | case ppc_stub_long_branch: |
| 11364 | case ppc_stub_long_branch_r2off: |
| 11365 | /* Branches are relative. This is where we are going to. */ |
| 11366 | targ = (stub_entry->target_value |
| 11367 | + stub_entry->target_section->output_offset |
| 11368 | + stub_entry->target_section->output_section->vma); |
| 11369 | targ += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other); |
| 11370 | |
| 11371 | /* And this is where we are coming from. */ |
| 11372 | off = (stub_entry->stub_offset |
| 11373 | + stub_entry->group->stub_sec->output_offset |
| 11374 | + stub_entry->group->stub_sec->output_section->vma); |
| 11375 | off = targ - off; |
| 11376 | |
| 11377 | p = loc; |
| 11378 | if (stub_entry->stub_type == ppc_stub_long_branch_r2off) |
| 11379 | { |
| 11380 | bfd_vma r2off = get_r2off (info, stub_entry); |
| 11381 | |
| 11382 | if (r2off == (bfd_vma) -1) |
| 11383 | { |
| 11384 | htab->stub_error = TRUE; |
| 11385 | return FALSE; |
| 11386 | } |
| 11387 | bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), p); |
| 11388 | p += 4; |
| 11389 | if (PPC_HA (r2off) != 0) |
| 11390 | { |
| 11391 | bfd_put_32 (htab->params->stub_bfd, |
| 11392 | ADDIS_R2_R2 | PPC_HA (r2off), p); |
| 11393 | p += 4; |
| 11394 | } |
| 11395 | if (PPC_LO (r2off) != 0) |
| 11396 | { |
| 11397 | bfd_put_32 (htab->params->stub_bfd, |
| 11398 | ADDI_R2_R2 | PPC_LO (r2off), p); |
| 11399 | p += 4; |
| 11400 | } |
| 11401 | off -= p - loc; |
| 11402 | } |
| 11403 | bfd_put_32 (htab->params->stub_bfd, B_DOT | (off & 0x3fffffc), p); |
| 11404 | p += 4; |
| 11405 | |
| 11406 | if (off + (1 << 25) >= (bfd_vma) (1 << 26)) |
| 11407 | { |
| 11408 | _bfd_error_handler |
| 11409 | (_("long branch stub `%s' offset overflow"), |
| 11410 | stub_entry->root.string); |
| 11411 | htab->stub_error = TRUE; |
| 11412 | return FALSE; |
| 11413 | } |
| 11414 | |
| 11415 | if (info->emitrelocations) |
| 11416 | { |
| 11417 | r = get_relocs (stub_entry->group->stub_sec, 1); |
| 11418 | if (r == NULL) |
| 11419 | return FALSE; |
| 11420 | r->r_offset = p - 4 - stub_entry->group->stub_sec->contents; |
| 11421 | r->r_info = ELF64_R_INFO (0, R_PPC64_REL24); |
| 11422 | r->r_addend = targ; |
| 11423 | if (stub_entry->h != NULL |
| 11424 | && !use_global_in_relocs (htab, stub_entry, r, 1)) |
| 11425 | return FALSE; |
| 11426 | } |
| 11427 | break; |
| 11428 | |
| 11429 | case ppc_stub_plt_branch: |
| 11430 | case ppc_stub_plt_branch_r2off: |
| 11431 | br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table, |
| 11432 | stub_entry->root.string + 9, |
| 11433 | FALSE, FALSE); |
| 11434 | if (br_entry == NULL) |
| 11435 | { |
| 11436 | _bfd_error_handler (_("can't find branch stub `%s'"), |
| 11437 | stub_entry->root.string); |
| 11438 | htab->stub_error = TRUE; |
| 11439 | return FALSE; |
| 11440 | } |
| 11441 | |
| 11442 | targ = (stub_entry->target_value |
| 11443 | + stub_entry->target_section->output_offset |
| 11444 | + stub_entry->target_section->output_section->vma); |
| 11445 | if (stub_entry->stub_type != ppc_stub_plt_branch_r2off) |
| 11446 | targ += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other); |
| 11447 | |
| 11448 | bfd_put_64 (htab->brlt->owner, targ, |
| 11449 | htab->brlt->contents + br_entry->offset); |
| 11450 | |
| 11451 | if (br_entry->iter == htab->stub_iteration) |
| 11452 | { |
| 11453 | br_entry->iter = 0; |
| 11454 | |
| 11455 | if (htab->relbrlt != NULL) |
| 11456 | { |
| 11457 | /* Create a reloc for the branch lookup table entry. */ |
| 11458 | Elf_Internal_Rela rela; |
| 11459 | bfd_byte *rl; |
| 11460 | |
| 11461 | rela.r_offset = (br_entry->offset |
| 11462 | + htab->brlt->output_offset |
| 11463 | + htab->brlt->output_section->vma); |
| 11464 | rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); |
| 11465 | rela.r_addend = targ; |
| 11466 | |
| 11467 | rl = htab->relbrlt->contents; |
| 11468 | rl += (htab->relbrlt->reloc_count++ |
| 11469 | * sizeof (Elf64_External_Rela)); |
| 11470 | bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl); |
| 11471 | } |
| 11472 | else if (info->emitrelocations) |
| 11473 | { |
| 11474 | r = get_relocs (htab->brlt, 1); |
| 11475 | if (r == NULL) |
| 11476 | return FALSE; |
| 11477 | /* brlt, being SEC_LINKER_CREATED does not go through the |
| 11478 | normal reloc processing. Symbols and offsets are not |
| 11479 | translated from input file to output file form, so |
| 11480 | set up the offset per the output file. */ |
| 11481 | r->r_offset = (br_entry->offset |
| 11482 | + htab->brlt->output_offset |
| 11483 | + htab->brlt->output_section->vma); |
| 11484 | r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); |
| 11485 | r->r_addend = targ; |
| 11486 | } |
| 11487 | } |
| 11488 | |
| 11489 | targ = (br_entry->offset |
| 11490 | + htab->brlt->output_offset |
| 11491 | + htab->brlt->output_section->vma); |
| 11492 | |
| 11493 | off = (elf_gp (info->output_bfd) |
| 11494 | + htab->sec_info[stub_entry->group->link_sec->id].toc_off); |
| 11495 | off = targ - off; |
| 11496 | |
| 11497 | if (off + 0x80008000 > 0xffffffff || (off & 7) != 0) |
| 11498 | { |
| 11499 | info->callbacks->einfo |
| 11500 | (_("%P: linkage table error against `%pT'\n"), |
| 11501 | stub_entry->root.string); |
| 11502 | bfd_set_error (bfd_error_bad_value); |
| 11503 | htab->stub_error = TRUE; |
| 11504 | return FALSE; |
| 11505 | } |
| 11506 | |
| 11507 | if (info->emitrelocations) |
| 11508 | { |
| 11509 | r = get_relocs (stub_entry->group->stub_sec, 1 + (PPC_HA (off) != 0)); |
| 11510 | if (r == NULL) |
| 11511 | return FALSE; |
| 11512 | r[0].r_offset = loc - stub_entry->group->stub_sec->contents; |
| 11513 | if (bfd_big_endian (info->output_bfd)) |
| 11514 | r[0].r_offset += 2; |
| 11515 | if (stub_entry->stub_type == ppc_stub_plt_branch_r2off) |
| 11516 | r[0].r_offset += 4; |
| 11517 | r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS); |
| 11518 | r[0].r_addend = targ; |
| 11519 | if (PPC_HA (off) != 0) |
| 11520 | { |
| 11521 | r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA); |
| 11522 | r[1].r_offset = r[0].r_offset + 4; |
| 11523 | r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS); |
| 11524 | r[1].r_addend = r[0].r_addend; |
| 11525 | } |
| 11526 | } |
| 11527 | |
| 11528 | p = loc; |
| 11529 | if (stub_entry->stub_type != ppc_stub_plt_branch_r2off) |
| 11530 | { |
| 11531 | if (PPC_HA (off) != 0) |
| 11532 | { |
| 11533 | bfd_put_32 (htab->params->stub_bfd, |
| 11534 | ADDIS_R12_R2 | PPC_HA (off), p); |
| 11535 | p += 4; |
| 11536 | bfd_put_32 (htab->params->stub_bfd, |
| 11537 | LD_R12_0R12 | PPC_LO (off), p); |
| 11538 | } |
| 11539 | else |
| 11540 | bfd_put_32 (htab->params->stub_bfd, |
| 11541 | LD_R12_0R2 | PPC_LO (off), p); |
| 11542 | } |
| 11543 | else |
| 11544 | { |
| 11545 | bfd_vma r2off = get_r2off (info, stub_entry); |
| 11546 | |
| 11547 | if (r2off == (bfd_vma) -1) |
| 11548 | { |
| 11549 | htab->stub_error = TRUE; |
| 11550 | return FALSE; |
| 11551 | } |
| 11552 | |
| 11553 | bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), p); |
| 11554 | p += 4; |
| 11555 | if (PPC_HA (off) != 0) |
| 11556 | { |
| 11557 | bfd_put_32 (htab->params->stub_bfd, |
| 11558 | ADDIS_R12_R2 | PPC_HA (off), p); |
| 11559 | p += 4; |
| 11560 | bfd_put_32 (htab->params->stub_bfd, |
| 11561 | LD_R12_0R12 | PPC_LO (off), p); |
| 11562 | } |
| 11563 | else |
| 11564 | bfd_put_32 (htab->params->stub_bfd, LD_R12_0R2 | PPC_LO (off), p); |
| 11565 | |
| 11566 | if (PPC_HA (r2off) != 0) |
| 11567 | { |
| 11568 | p += 4; |
| 11569 | bfd_put_32 (htab->params->stub_bfd, |
| 11570 | ADDIS_R2_R2 | PPC_HA (r2off), p); |
| 11571 | } |
| 11572 | if (PPC_LO (r2off) != 0) |
| 11573 | { |
| 11574 | p += 4; |
| 11575 | bfd_put_32 (htab->params->stub_bfd, |
| 11576 | ADDI_R2_R2 | PPC_LO (r2off), p); |
| 11577 | } |
| 11578 | } |
| 11579 | p += 4; |
| 11580 | bfd_put_32 (htab->params->stub_bfd, MTCTR_R12, p); |
| 11581 | p += 4; |
| 11582 | bfd_put_32 (htab->params->stub_bfd, BCTR, p); |
| 11583 | p += 4; |
| 11584 | break; |
| 11585 | |
| 11586 | case ppc_stub_long_branch_notoc: |
| 11587 | case ppc_stub_long_branch_both: |
| 11588 | case ppc_stub_plt_branch_notoc: |
| 11589 | case ppc_stub_plt_branch_both: |
| 11590 | case ppc_stub_plt_call_notoc: |
| 11591 | case ppc_stub_plt_call_both: |
| 11592 | p = loc; |
| 11593 | off = (stub_entry->stub_offset |
| 11594 | + stub_entry->group->stub_sec->output_offset |
| 11595 | + stub_entry->group->stub_sec->output_section->vma); |
| 11596 | if (stub_entry->stub_type == ppc_stub_long_branch_both |
| 11597 | || stub_entry->stub_type == ppc_stub_plt_branch_both |
| 11598 | || stub_entry->stub_type == ppc_stub_plt_call_both) |
| 11599 | { |
| 11600 | off += 4; |
| 11601 | bfd_put_32 (htab->params->stub_bfd, STD_R2_0R1 + STK_TOC (htab), p); |
| 11602 | p += 4; |
| 11603 | } |
| 11604 | if (stub_entry->stub_type >= ppc_stub_plt_call_notoc) |
| 11605 | { |
| 11606 | targ = stub_entry->plt_ent->plt.offset & ~1; |
| 11607 | if (targ >= (bfd_vma) -2) |
| 11608 | abort (); |
| 11609 | |
| 11610 | plt = htab->elf.splt; |
| 11611 | if (!htab->elf.dynamic_sections_created |
| 11612 | || stub_entry->h == NULL |
| 11613 | || stub_entry->h->elf.dynindx == -1) |
| 11614 | { |
| 11615 | if (stub_entry->symtype == STT_GNU_IFUNC) |
| 11616 | plt = htab->elf.iplt; |
| 11617 | else |
| 11618 | plt = htab->pltlocal; |
| 11619 | } |
| 11620 | targ += plt->output_offset + plt->output_section->vma; |
| 11621 | } |
| 11622 | else |
| 11623 | targ = (stub_entry->target_value |
| 11624 | + stub_entry->target_section->output_offset |
| 11625 | + stub_entry->target_section->output_section->vma); |
| 11626 | odd = off & 4; |
| 11627 | off = targ - off; |
| 11628 | |
| 11629 | relp = p; |
| 11630 | num_rel = 0; |
| 11631 | if (htab->power10_stubs) |
| 11632 | { |
| 11633 | bfd_boolean load = stub_entry->stub_type >= ppc_stub_plt_call_notoc; |
| 11634 | p = build_power10_offset (htab->params->stub_bfd, p, off, odd, load); |
| 11635 | } |
| 11636 | else |
| 11637 | { |
| 11638 | /* The notoc stubs calculate their target (either a PLT entry or |
| 11639 | the global entry point of a function) relative to the PC |
| 11640 | returned by the "bcl" two instructions past the start of the |
| 11641 | sequence emitted by build_offset. The offset is therefore 8 |
| 11642 | less than calculated from the start of the sequence. */ |
| 11643 | off -= 8; |
| 11644 | p = build_offset (htab->params->stub_bfd, p, off, |
| 11645 | stub_entry->stub_type >= ppc_stub_plt_call_notoc); |
| 11646 | } |
| 11647 | |
| 11648 | if (stub_entry->stub_type <= ppc_stub_long_branch_both) |
| 11649 | { |
| 11650 | bfd_vma from; |
| 11651 | num_rel = 1; |
| 11652 | from = (stub_entry->stub_offset |
| 11653 | + stub_entry->group->stub_sec->output_offset |
| 11654 | + stub_entry->group->stub_sec->output_section->vma |
| 11655 | + (p - loc)); |
| 11656 | bfd_put_32 (htab->params->stub_bfd, |
| 11657 | B_DOT | ((targ - from) & 0x3fffffc), p); |
| 11658 | } |
| 11659 | else |
| 11660 | { |
| 11661 | bfd_put_32 (htab->params->stub_bfd, MTCTR_R12, p); |
| 11662 | p += 4; |
| 11663 | bfd_put_32 (htab->params->stub_bfd, BCTR, p); |
| 11664 | } |
| 11665 | p += 4; |
| 11666 | |
| 11667 | if (info->emitrelocations) |
| 11668 | { |
| 11669 | bfd_vma roff = relp - stub_entry->group->stub_sec->contents; |
| 11670 | if (htab->power10_stubs) |
| 11671 | num_rel += num_relocs_for_power10_offset (off, odd); |
| 11672 | else |
| 11673 | { |
| 11674 | num_rel += num_relocs_for_offset (off); |
| 11675 | roff += 16; |
| 11676 | } |
| 11677 | r = get_relocs (stub_entry->group->stub_sec, num_rel); |
| 11678 | if (r == NULL) |
| 11679 | return FALSE; |
| 11680 | if (htab->power10_stubs) |
| 11681 | r = emit_relocs_for_power10_offset (info, r, roff, targ, off, odd); |
| 11682 | else |
| 11683 | r = emit_relocs_for_offset (info, r, roff, targ, off); |
| 11684 | if (stub_entry->stub_type == ppc_stub_long_branch_notoc |
| 11685 | || stub_entry->stub_type == ppc_stub_long_branch_both) |
| 11686 | { |
| 11687 | ++r; |
| 11688 | roff = p - 4 - stub_entry->group->stub_sec->contents; |
| 11689 | r->r_offset = roff; |
| 11690 | r->r_info = ELF64_R_INFO (0, R_PPC64_REL24); |
| 11691 | r->r_addend = targ; |
| 11692 | if (stub_entry->h != NULL |
| 11693 | && !use_global_in_relocs (htab, stub_entry, r, num_rel)) |
| 11694 | return FALSE; |
| 11695 | } |
| 11696 | } |
| 11697 | |
| 11698 | if (!htab->power10_stubs |
| 11699 | && htab->glink_eh_frame != NULL |
| 11700 | && htab->glink_eh_frame->size != 0) |
| 11701 | { |
| 11702 | bfd_byte *base, *eh; |
| 11703 | unsigned int lr_used, delta; |
| 11704 | |
| 11705 | base = (htab->glink_eh_frame->contents |
| 11706 | + stub_entry->group->eh_base + 17); |
| 11707 | eh = base + stub_entry->group->eh_size; |
| 11708 | lr_used = stub_entry->stub_offset + 8; |
| 11709 | if (stub_entry->stub_type == ppc_stub_long_branch_both |
| 11710 | || stub_entry->stub_type == ppc_stub_plt_branch_both |
| 11711 | || stub_entry->stub_type == ppc_stub_plt_call_both) |
| 11712 | lr_used += 4; |
| 11713 | delta = lr_used - stub_entry->group->lr_restore; |
| 11714 | stub_entry->group->lr_restore = lr_used + 8; |
| 11715 | eh = eh_advance (htab->elf.dynobj, eh, delta); |
| 11716 | *eh++ = DW_CFA_register; |
| 11717 | *eh++ = 65; |
| 11718 | *eh++ = 12; |
| 11719 | *eh++ = DW_CFA_advance_loc + 2; |
| 11720 | *eh++ = DW_CFA_restore_extended; |
| 11721 | *eh++ = 65; |
| 11722 | stub_entry->group->eh_size = eh - base; |
| 11723 | } |
| 11724 | break; |
| 11725 | |
| 11726 | case ppc_stub_plt_call: |
| 11727 | case ppc_stub_plt_call_r2save: |
| 11728 | if (stub_entry->h != NULL |
| 11729 | && stub_entry->h->is_func_descriptor |
| 11730 | && stub_entry->h->oh != NULL) |
| 11731 | { |
| 11732 | struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh); |
| 11733 | |
| 11734 | /* If the old-ABI "dot-symbol" is undefined make it weak so |
| 11735 | we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL. */ |
| 11736 | if (fh->elf.root.type == bfd_link_hash_undefined |
| 11737 | && (stub_entry->h->elf.root.type == bfd_link_hash_defined |
| 11738 | || stub_entry->h->elf.root.type == bfd_link_hash_defweak)) |
| 11739 | fh->elf.root.type = bfd_link_hash_undefweak; |
| 11740 | } |
| 11741 | |
| 11742 | /* Now build the stub. */ |
| 11743 | targ = stub_entry->plt_ent->plt.offset & ~1; |
| 11744 | if (targ >= (bfd_vma) -2) |
| 11745 | abort (); |
| 11746 | |
| 11747 | plt = htab->elf.splt; |
| 11748 | if (!htab->elf.dynamic_sections_created |
| 11749 | || stub_entry->h == NULL |
| 11750 | || stub_entry->h->elf.dynindx == -1) |
| 11751 | { |
| 11752 | if (stub_entry->symtype == STT_GNU_IFUNC) |
| 11753 | plt = htab->elf.iplt; |
| 11754 | else |
| 11755 | plt = htab->pltlocal; |
| 11756 | } |
| 11757 | targ += plt->output_offset + plt->output_section->vma; |
| 11758 | |
| 11759 | off = (elf_gp (info->output_bfd) |
| 11760 | + htab->sec_info[stub_entry->group->link_sec->id].toc_off); |
| 11761 | off = targ - off; |
| 11762 | |
| 11763 | if (off + 0x80008000 > 0xffffffff || (off & 7) != 0) |
| 11764 | { |
| 11765 | info->callbacks->einfo |
| 11766 | /* xgettext:c-format */ |
| 11767 | (_("%P: linkage table error against `%pT'\n"), |
| 11768 | stub_entry->h != NULL |
| 11769 | ? stub_entry->h->elf.root.root.string |
| 11770 | : "<local sym>"); |
| 11771 | bfd_set_error (bfd_error_bad_value); |
| 11772 | htab->stub_error = TRUE; |
| 11773 | return FALSE; |
| 11774 | } |
| 11775 | |
| 11776 | r = NULL; |
| 11777 | if (info->emitrelocations) |
| 11778 | { |
| 11779 | r = get_relocs (stub_entry->group->stub_sec, |
| 11780 | ((PPC_HA (off) != 0) |
| 11781 | + (htab->opd_abi |
| 11782 | ? 2 + (htab->params->plt_static_chain |
| 11783 | && PPC_HA (off + 16) == PPC_HA (off)) |
| 11784 | : 1))); |
| 11785 | if (r == NULL) |
| 11786 | return FALSE; |
| 11787 | r[0].r_offset = loc - stub_entry->group->stub_sec->contents; |
| 11788 | if (bfd_big_endian (info->output_bfd)) |
| 11789 | r[0].r_offset += 2; |
| 11790 | r[0].r_addend = targ; |
| 11791 | } |
| 11792 | if (stub_entry->h != NULL |
| 11793 | && is_tls_get_addr (&stub_entry->h->elf, htab) |
| 11794 | && htab->params->tls_get_addr_opt) |
| 11795 | p = build_tls_get_addr_stub (htab, stub_entry, loc, off, r); |
| 11796 | else |
| 11797 | p = build_plt_stub (htab, stub_entry, loc, off, r); |
| 11798 | break; |
| 11799 | |
| 11800 | case ppc_stub_save_res: |
| 11801 | return TRUE; |
| 11802 | |
| 11803 | default: |
| 11804 | BFD_FAIL (); |
| 11805 | return FALSE; |
| 11806 | } |
| 11807 | |
| 11808 | stub_entry->group->stub_sec->size = stub_entry->stub_offset + (p - loc); |
| 11809 | |
| 11810 | if (htab->params->emit_stub_syms) |
| 11811 | { |
| 11812 | struct elf_link_hash_entry *h; |
| 11813 | size_t len1, len2; |
| 11814 | char *name; |
| 11815 | const char *const stub_str[] = { "long_branch", |
| 11816 | "long_branch", |
| 11817 | "long_branch", |
| 11818 | "long_branch", |
| 11819 | "plt_branch", |
| 11820 | "plt_branch", |
| 11821 | "plt_branch", |
| 11822 | "plt_branch", |
| 11823 | "plt_call", |
| 11824 | "plt_call", |
| 11825 | "plt_call", |
| 11826 | "plt_call" }; |
| 11827 | |
| 11828 | len1 = strlen (stub_str[stub_entry->stub_type - 1]); |
| 11829 | len2 = strlen (stub_entry->root.string); |
| 11830 | name = bfd_malloc (len1 + len2 + 2); |
| 11831 | if (name == NULL) |
| 11832 | return FALSE; |
| 11833 | memcpy (name, stub_entry->root.string, 9); |
| 11834 | memcpy (name + 9, stub_str[stub_entry->stub_type - 1], len1); |
| 11835 | memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1); |
| 11836 | h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE); |
| 11837 | if (h == NULL) |
| 11838 | return FALSE; |
| 11839 | if (h->root.type == bfd_link_hash_new) |
| 11840 | { |
| 11841 | h->root.type = bfd_link_hash_defined; |
| 11842 | h->root.u.def.section = stub_entry->group->stub_sec; |
| 11843 | h->root.u.def.value = stub_entry->stub_offset; |
| 11844 | h->ref_regular = 1; |
| 11845 | h->def_regular = 1; |
| 11846 | h->ref_regular_nonweak = 1; |
| 11847 | h->forced_local = 1; |
| 11848 | h->non_elf = 0; |
| 11849 | h->root.linker_def = 1; |
| 11850 | } |
| 11851 | } |
| 11852 | |
| 11853 | return TRUE; |
| 11854 | } |
| 11855 | |
| 11856 | /* As above, but don't actually build the stub. Just bump offset so |
| 11857 | we know stub section sizes, and select plt_branch stubs where |
| 11858 | long_branch stubs won't do. */ |
| 11859 | |
| 11860 | static bfd_boolean |
| 11861 | ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg) |
| 11862 | { |
| 11863 | struct ppc_stub_hash_entry *stub_entry; |
| 11864 | struct bfd_link_info *info; |
| 11865 | struct ppc_link_hash_table *htab; |
| 11866 | asection *plt; |
| 11867 | bfd_vma targ, off, r2off; |
| 11868 | unsigned int size, extra, lr_used, delta, odd; |
| 11869 | |
| 11870 | /* Massage our args to the form they really have. */ |
| 11871 | stub_entry = (struct ppc_stub_hash_entry *) gen_entry; |
| 11872 | info = in_arg; |
| 11873 | |
| 11874 | htab = ppc_hash_table (info); |
| 11875 | if (htab == NULL) |
| 11876 | return FALSE; |
| 11877 | |
| 11878 | /* Fail if the target section could not be assigned to an output |
| 11879 | section. The user should fix his linker script. */ |
| 11880 | if (stub_entry->target_section != NULL |
| 11881 | && stub_entry->target_section->output_section == NULL |
| 11882 | && info->non_contiguous_regions) |
| 11883 | info->callbacks->einfo (_("%F%P: Could not assign %pA to an output section. " |
| 11884 | "Retry without --enable-non-contiguous-regions.\n"), |
| 11885 | stub_entry->target_section); |
| 11886 | |
| 11887 | /* Same for the group. */ |
| 11888 | if (stub_entry->group->stub_sec != NULL |
| 11889 | && stub_entry->group->stub_sec->output_section == NULL |
| 11890 | && info->non_contiguous_regions) |
| 11891 | info->callbacks->einfo (_("%F%P: Could not assign group %pA target %pA to an " |
| 11892 | "output section. Retry without " |
| 11893 | "--enable-non-contiguous-regions.\n"), |
| 11894 | stub_entry->group->stub_sec, |
| 11895 | stub_entry->target_section); |
| 11896 | |
| 11897 | /* Make a note of the offset within the stubs for this entry. */ |
| 11898 | stub_entry->stub_offset = stub_entry->group->stub_sec->size; |
| 11899 | |
| 11900 | if (stub_entry->h != NULL |
| 11901 | && stub_entry->h->save_res |
| 11902 | && stub_entry->h->elf.root.type == bfd_link_hash_defined |
| 11903 | && stub_entry->h->elf.root.u.def.section == htab->sfpr) |
| 11904 | { |
| 11905 | /* Don't make stubs to out-of-line register save/restore |
| 11906 | functions. Instead, emit copies of the functions. */ |
| 11907 | stub_entry->group->needs_save_res = 1; |
| 11908 | stub_entry->stub_type = ppc_stub_save_res; |
| 11909 | return TRUE; |
| 11910 | } |
| 11911 | |
| 11912 | switch (stub_entry->stub_type) |
| 11913 | { |
| 11914 | case ppc_stub_plt_branch: |
| 11915 | case ppc_stub_plt_branch_r2off: |
| 11916 | /* Reset the stub type from the plt branch variant in case we now |
| 11917 | can reach with a shorter stub. */ |
| 11918 | stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch; |
| 11919 | /* Fall through. */ |
| 11920 | case ppc_stub_long_branch: |
| 11921 | case ppc_stub_long_branch_r2off: |
| 11922 | targ = (stub_entry->target_value |
| 11923 | + stub_entry->target_section->output_offset |
| 11924 | + stub_entry->target_section->output_section->vma); |
| 11925 | targ += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other); |
| 11926 | off = (stub_entry->stub_offset |
| 11927 | + stub_entry->group->stub_sec->output_offset |
| 11928 | + stub_entry->group->stub_sec->output_section->vma); |
| 11929 | |
| 11930 | size = 4; |
| 11931 | r2off = 0; |
| 11932 | if (stub_entry->stub_type == ppc_stub_long_branch_r2off) |
| 11933 | { |
| 11934 | r2off = get_r2off (info, stub_entry); |
| 11935 | if (r2off == (bfd_vma) -1) |
| 11936 | { |
| 11937 | htab->stub_error = TRUE; |
| 11938 | return FALSE; |
| 11939 | } |
| 11940 | size = 8; |
| 11941 | if (PPC_HA (r2off) != 0) |
| 11942 | size += 4; |
| 11943 | if (PPC_LO (r2off) != 0) |
| 11944 | size += 4; |
| 11945 | off += size - 4; |
| 11946 | } |
| 11947 | off = targ - off; |
| 11948 | |
| 11949 | /* If the branch offset is too big, use a ppc_stub_plt_branch. |
| 11950 | Do the same for -R objects without function descriptors. */ |
| 11951 | if ((stub_entry->stub_type == ppc_stub_long_branch_r2off |
| 11952 | && r2off == 0 |
| 11953 | && htab->sec_info[stub_entry->target_section->id].toc_off == 0) |
| 11954 | || off + (1 << 25) >= (bfd_vma) (1 << 26)) |
| 11955 | { |
| 11956 | struct ppc_branch_hash_entry *br_entry; |
| 11957 | |
| 11958 | br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table, |
| 11959 | stub_entry->root.string + 9, |
| 11960 | TRUE, FALSE); |
| 11961 | if (br_entry == NULL) |
| 11962 | { |
| 11963 | _bfd_error_handler (_("can't build branch stub `%s'"), |
| 11964 | stub_entry->root.string); |
| 11965 | htab->stub_error = TRUE; |
| 11966 | return FALSE; |
| 11967 | } |
| 11968 | |
| 11969 | if (br_entry->iter != htab->stub_iteration) |
| 11970 | { |
| 11971 | br_entry->iter = htab->stub_iteration; |
| 11972 | br_entry->offset = htab->brlt->size; |
| 11973 | htab->brlt->size += 8; |
| 11974 | |
| 11975 | if (htab->relbrlt != NULL) |
| 11976 | htab->relbrlt->size += sizeof (Elf64_External_Rela); |
| 11977 | else if (info->emitrelocations) |
| 11978 | { |
| 11979 | htab->brlt->reloc_count += 1; |
| 11980 | htab->brlt->flags |= SEC_RELOC; |
| 11981 | } |
| 11982 | } |
| 11983 | |
| 11984 | targ = (br_entry->offset |
| 11985 | + htab->brlt->output_offset |
| 11986 | + htab->brlt->output_section->vma); |
| 11987 | off = (elf_gp (info->output_bfd) |
| 11988 | + htab->sec_info[stub_entry->group->link_sec->id].toc_off); |
| 11989 | off = targ - off; |
| 11990 | |
| 11991 | if (info->emitrelocations) |
| 11992 | { |
| 11993 | stub_entry->group->stub_sec->reloc_count |
| 11994 | += 1 + (PPC_HA (off) != 0); |
| 11995 | stub_entry->group->stub_sec->flags |= SEC_RELOC; |
| 11996 | } |
| 11997 | |
| 11998 | stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch; |
| 11999 | if (stub_entry->stub_type != ppc_stub_plt_branch_r2off) |
| 12000 | { |
| 12001 | size = 12; |
| 12002 | if (PPC_HA (off) != 0) |
| 12003 | size = 16; |
| 12004 | } |
| 12005 | else |
| 12006 | { |
| 12007 | size = 16; |
| 12008 | if (PPC_HA (off) != 0) |
| 12009 | size += 4; |
| 12010 | |
| 12011 | if (PPC_HA (r2off) != 0) |
| 12012 | size += 4; |
| 12013 | if (PPC_LO (r2off) != 0) |
| 12014 | size += 4; |
| 12015 | } |
| 12016 | } |
| 12017 | else if (info->emitrelocations) |
| 12018 | { |
| 12019 | stub_entry->group->stub_sec->reloc_count += 1; |
| 12020 | stub_entry->group->stub_sec->flags |= SEC_RELOC; |
| 12021 | } |
| 12022 | break; |
| 12023 | |
| 12024 | case ppc_stub_plt_branch_notoc: |
| 12025 | case ppc_stub_plt_branch_both: |
| 12026 | stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch; |
| 12027 | /* Fall through. */ |
| 12028 | case ppc_stub_long_branch_notoc: |
| 12029 | case ppc_stub_long_branch_both: |
| 12030 | off = (stub_entry->stub_offset |
| 12031 | + stub_entry->group->stub_sec->output_offset |
| 12032 | + stub_entry->group->stub_sec->output_section->vma); |
| 12033 | size = 0; |
| 12034 | if (stub_entry->stub_type == ppc_stub_long_branch_both) |
| 12035 | size = 4; |
| 12036 | off += size; |
| 12037 | targ = (stub_entry->target_value |
| 12038 | + stub_entry->target_section->output_offset |
| 12039 | + stub_entry->target_section->output_section->vma); |
| 12040 | odd = off & 4; |
| 12041 | off = targ - off; |
| 12042 | |
| 12043 | if (info->emitrelocations) |
| 12044 | { |
| 12045 | unsigned int num_rel; |
| 12046 | if (htab->power10_stubs) |
| 12047 | num_rel = num_relocs_for_power10_offset (off, odd); |
| 12048 | else |
| 12049 | num_rel = num_relocs_for_offset (off - 8); |
| 12050 | stub_entry->group->stub_sec->reloc_count += num_rel; |
| 12051 | stub_entry->group->stub_sec->flags |= SEC_RELOC; |
| 12052 | } |
| 12053 | |
| 12054 | if (htab->power10_stubs) |
| 12055 | extra = size_power10_offset (off, odd); |
| 12056 | else |
| 12057 | extra = size_offset (off - 8); |
| 12058 | /* Include branch insn plus those in the offset sequence. */ |
| 12059 | size += 4 + extra; |
| 12060 | /* The branch insn is at the end, or "extra" bytes along. So |
| 12061 | its offset will be "extra" bytes less that that already |
| 12062 | calculated. */ |
| 12063 | off -= extra; |
| 12064 | |
| 12065 | if (!htab->power10_stubs) |
| 12066 | { |
| 12067 | /* After the bcl, lr has been modified so we need to emit |
| 12068 | .eh_frame info saying the return address is in r12. */ |
| 12069 | lr_used = stub_entry->stub_offset + 8; |
| 12070 | if (stub_entry->stub_type == ppc_stub_long_branch_both) |
| 12071 | lr_used += 4; |
| 12072 | /* The eh_frame info will consist of a DW_CFA_advance_loc or |
| 12073 | variant, DW_CFA_register, 65, 12, DW_CFA_advance_loc+2, |
| 12074 | DW_CFA_restore_extended 65. */ |
| 12075 | delta = lr_used - stub_entry->group->lr_restore; |
| 12076 | stub_entry->group->eh_size += eh_advance_size (delta) + 6; |
| 12077 | stub_entry->group->lr_restore = lr_used + 8; |
| 12078 | } |
| 12079 | |
| 12080 | /* If the branch can't reach, use a plt_branch. */ |
| 12081 | if (off + (1 << 25) >= (bfd_vma) (1 << 26)) |
| 12082 | { |
| 12083 | stub_entry->stub_type += (ppc_stub_plt_branch_notoc |
| 12084 | - ppc_stub_long_branch_notoc); |
| 12085 | size += 4; |
| 12086 | } |
| 12087 | else if (info->emitrelocations) |
| 12088 | stub_entry->group->stub_sec->reloc_count +=1; |
| 12089 | break; |
| 12090 | |
| 12091 | case ppc_stub_plt_call_notoc: |
| 12092 | case ppc_stub_plt_call_both: |
| 12093 | off = (stub_entry->stub_offset |
| 12094 | + stub_entry->group->stub_sec->output_offset |
| 12095 | + stub_entry->group->stub_sec->output_section->vma); |
| 12096 | if (stub_entry->stub_type == ppc_stub_plt_call_both) |
| 12097 | off += 4; |
| 12098 | targ = stub_entry->plt_ent->plt.offset & ~1; |
| 12099 | if (targ >= (bfd_vma) -2) |
| 12100 | abort (); |
| 12101 | |
| 12102 | plt = htab->elf.splt; |
| 12103 | if (!htab->elf.dynamic_sections_created |
| 12104 | || stub_entry->h == NULL |
| 12105 | || stub_entry->h->elf.dynindx == -1) |
| 12106 | { |
| 12107 | if (stub_entry->symtype == STT_GNU_IFUNC) |
| 12108 | plt = htab->elf.iplt; |
| 12109 | else |
| 12110 | plt = htab->pltlocal; |
| 12111 | } |
| 12112 | targ += plt->output_offset + plt->output_section->vma; |
| 12113 | odd = off & 4; |
| 12114 | off = targ - off; |
| 12115 | |
| 12116 | if (htab->params->plt_stub_align != 0) |
| 12117 | { |
| 12118 | unsigned pad = plt_stub_pad (htab, stub_entry, off); |
| 12119 | |
| 12120 | stub_entry->group->stub_sec->size += pad; |
| 12121 | stub_entry->stub_offset = stub_entry->group->stub_sec->size; |
| 12122 | off -= pad; |
| 12123 | } |
| 12124 | |
| 12125 | if (info->emitrelocations) |
| 12126 | { |
| 12127 | unsigned int num_rel; |
| 12128 | if (htab->power10_stubs) |
| 12129 | num_rel = num_relocs_for_power10_offset (off, odd); |
| 12130 | else |
| 12131 | num_rel = num_relocs_for_offset (off - 8); |
| 12132 | stub_entry->group->stub_sec->reloc_count += num_rel; |
| 12133 | stub_entry->group->stub_sec->flags |= SEC_RELOC; |
| 12134 | } |
| 12135 | |
| 12136 | size = plt_stub_size (htab, stub_entry, off); |
| 12137 | |
| 12138 | if (!htab->power10_stubs) |
| 12139 | { |
| 12140 | /* After the bcl, lr has been modified so we need to emit |
| 12141 | .eh_frame info saying the return address is in r12. */ |
| 12142 | lr_used = stub_entry->stub_offset + 8; |
| 12143 | if (stub_entry->stub_type == ppc_stub_plt_call_both) |
| 12144 | lr_used += 4; |
| 12145 | /* The eh_frame info will consist of a DW_CFA_advance_loc or |
| 12146 | variant, DW_CFA_register, 65, 12, DW_CFA_advance_loc+2, |
| 12147 | DW_CFA_restore_extended 65. */ |
| 12148 | delta = lr_used - stub_entry->group->lr_restore; |
| 12149 | stub_entry->group->eh_size += eh_advance_size (delta) + 6; |
| 12150 | stub_entry->group->lr_restore = lr_used + 8; |
| 12151 | } |
| 12152 | break; |
| 12153 | |
| 12154 | case ppc_stub_plt_call: |
| 12155 | case ppc_stub_plt_call_r2save: |
| 12156 | targ = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1; |
| 12157 | if (targ >= (bfd_vma) -2) |
| 12158 | abort (); |
| 12159 | plt = htab->elf.splt; |
| 12160 | if (!htab->elf.dynamic_sections_created |
| 12161 | || stub_entry->h == NULL |
| 12162 | || stub_entry->h->elf.dynindx == -1) |
| 12163 | { |
| 12164 | if (stub_entry->symtype == STT_GNU_IFUNC) |
| 12165 | plt = htab->elf.iplt; |
| 12166 | else |
| 12167 | plt = htab->pltlocal; |
| 12168 | } |
| 12169 | targ += plt->output_offset + plt->output_section->vma; |
| 12170 | |
| 12171 | off = (elf_gp (info->output_bfd) |
| 12172 | + htab->sec_info[stub_entry->group->link_sec->id].toc_off); |
| 12173 | off = targ - off; |
| 12174 | |
| 12175 | if (htab->params->plt_stub_align != 0) |
| 12176 | { |
| 12177 | unsigned pad = plt_stub_pad (htab, stub_entry, off); |
| 12178 | |
| 12179 | stub_entry->group->stub_sec->size += pad; |
| 12180 | stub_entry->stub_offset = stub_entry->group->stub_sec->size; |
| 12181 | } |
| 12182 | |
| 12183 | if (info->emitrelocations) |
| 12184 | { |
| 12185 | stub_entry->group->stub_sec->reloc_count |
| 12186 | += ((PPC_HA (off) != 0) |
| 12187 | + (htab->opd_abi |
| 12188 | ? 2 + (htab->params->plt_static_chain |
| 12189 | && PPC_HA (off + 16) == PPC_HA (off)) |
| 12190 | : 1)); |
| 12191 | stub_entry->group->stub_sec->flags |= SEC_RELOC; |
| 12192 | } |
| 12193 | |
| 12194 | size = plt_stub_size (htab, stub_entry, off); |
| 12195 | |
| 12196 | if (stub_entry->h != NULL |
| 12197 | && is_tls_get_addr (&stub_entry->h->elf, htab) |
| 12198 | && htab->params->tls_get_addr_opt |
| 12199 | && stub_entry->stub_type == ppc_stub_plt_call_r2save) |
| 12200 | { |
| 12201 | if (htab->params->no_tls_get_addr_regsave) |
| 12202 | { |
| 12203 | lr_used = stub_entry->stub_offset + size - 20; |
| 12204 | /* The eh_frame info will consist of a DW_CFA_advance_loc |
| 12205 | or variant, DW_CFA_offset_externed_sf, 65, -stackoff, |
| 12206 | DW_CFA_advance_loc+4, DW_CFA_restore_extended, 65. */ |
| 12207 | delta = lr_used - stub_entry->group->lr_restore; |
| 12208 | stub_entry->group->eh_size += eh_advance_size (delta) + 6; |
| 12209 | } |
| 12210 | else |
| 12211 | { |
| 12212 | /* Adjustments to r1 need to be described. */ |
| 12213 | unsigned int cfa_updt = stub_entry->stub_offset + 18 * 4; |
| 12214 | delta = cfa_updt - stub_entry->group->lr_restore; |
| 12215 | stub_entry->group->eh_size += eh_advance_size (delta); |
| 12216 | stub_entry->group->eh_size += htab->opd_abi ? 36 : 35; |
| 12217 | } |
| 12218 | stub_entry->group->lr_restore = size - 4; |
| 12219 | } |
| 12220 | break; |
| 12221 | |
| 12222 | default: |
| 12223 | BFD_FAIL (); |
| 12224 | return FALSE; |
| 12225 | } |
| 12226 | |
| 12227 | stub_entry->group->stub_sec->size += size; |
| 12228 | return TRUE; |
| 12229 | } |
| 12230 | |
| 12231 | /* Set up various things so that we can make a list of input sections |
| 12232 | for each output section included in the link. Returns -1 on error, |
| 12233 | 0 when no stubs will be needed, and 1 on success. */ |
| 12234 | |
| 12235 | int |
| 12236 | ppc64_elf_setup_section_lists (struct bfd_link_info *info) |
| 12237 | { |
| 12238 | unsigned int id; |
| 12239 | size_t amt; |
| 12240 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
| 12241 | |
| 12242 | if (htab == NULL) |
| 12243 | return -1; |
| 12244 | |
| 12245 | htab->sec_info_arr_size = _bfd_section_id; |
| 12246 | amt = sizeof (*htab->sec_info) * (htab->sec_info_arr_size); |
| 12247 | htab->sec_info = bfd_zmalloc (amt); |
| 12248 | if (htab->sec_info == NULL) |
| 12249 | return -1; |
| 12250 | |
| 12251 | /* Set toc_off for com, und, abs and ind sections. */ |
| 12252 | for (id = 0; id < 3; id++) |
| 12253 | htab->sec_info[id].toc_off = TOC_BASE_OFF; |
| 12254 | |
| 12255 | return 1; |
| 12256 | } |
| 12257 | |
| 12258 | /* Set up for first pass at multitoc partitioning. */ |
| 12259 | |
| 12260 | void |
| 12261 | ppc64_elf_start_multitoc_partition (struct bfd_link_info *info) |
| 12262 | { |
| 12263 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
| 12264 | |
| 12265 | htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd); |
| 12266 | htab->toc_bfd = NULL; |
| 12267 | htab->toc_first_sec = NULL; |
| 12268 | } |
| 12269 | |
| 12270 | /* The linker repeatedly calls this function for each TOC input section |
| 12271 | and linker generated GOT section. Group input bfds such that the toc |
| 12272 | within a group is less than 64k in size. */ |
| 12273 | |
| 12274 | bfd_boolean |
| 12275 | ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec) |
| 12276 | { |
| 12277 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
| 12278 | bfd_vma addr, off, limit; |
| 12279 | |
| 12280 | if (htab == NULL) |
| 12281 | return FALSE; |
| 12282 | |
| 12283 | if (!htab->second_toc_pass) |
| 12284 | { |
| 12285 | /* Keep track of the first .toc or .got section for this input bfd. */ |
| 12286 | bfd_boolean new_bfd = htab->toc_bfd != isec->owner; |
| 12287 | |
| 12288 | if (new_bfd) |
| 12289 | { |
| 12290 | htab->toc_bfd = isec->owner; |
| 12291 | htab->toc_first_sec = isec; |
| 12292 | } |
| 12293 | |
| 12294 | addr = isec->output_offset + isec->output_section->vma; |
| 12295 | off = addr - htab->toc_curr; |
| 12296 | limit = 0x80008000; |
| 12297 | if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc) |
| 12298 | limit = 0x10000; |
| 12299 | if (off + isec->size > limit) |
| 12300 | { |
| 12301 | addr = (htab->toc_first_sec->output_offset |
| 12302 | + htab->toc_first_sec->output_section->vma); |
| 12303 | htab->toc_curr = addr; |
| 12304 | htab->toc_curr &= -TOC_BASE_ALIGN; |
| 12305 | } |
| 12306 | |
| 12307 | /* toc_curr is the base address of this toc group. Set elf_gp |
| 12308 | for the input section to be the offset relative to the |
| 12309 | output toc base plus 0x8000. Making the input elf_gp an |
| 12310 | offset allows us to move the toc as a whole without |
| 12311 | recalculating input elf_gp. */ |
| 12312 | off = htab->toc_curr - elf_gp (info->output_bfd); |
| 12313 | off += TOC_BASE_OFF; |
| 12314 | |
| 12315 | /* Die if someone uses a linker script that doesn't keep input |
| 12316 | file .toc and .got together. */ |
| 12317 | if (new_bfd |
| 12318 | && elf_gp (isec->owner) != 0 |
| 12319 | && elf_gp (isec->owner) != off) |
| 12320 | return FALSE; |
| 12321 | |
| 12322 | elf_gp (isec->owner) = off; |
| 12323 | return TRUE; |
| 12324 | } |
| 12325 | |
| 12326 | /* During the second pass toc_first_sec points to the start of |
| 12327 | a toc group, and toc_curr is used to track the old elf_gp. |
| 12328 | We use toc_bfd to ensure we only look at each bfd once. */ |
| 12329 | if (htab->toc_bfd == isec->owner) |
| 12330 | return TRUE; |
| 12331 | htab->toc_bfd = isec->owner; |
| 12332 | |
| 12333 | if (htab->toc_first_sec == NULL |
| 12334 | || htab->toc_curr != elf_gp (isec->owner)) |
| 12335 | { |
| 12336 | htab->toc_curr = elf_gp (isec->owner); |
| 12337 | htab->toc_first_sec = isec; |
| 12338 | } |
| 12339 | addr = (htab->toc_first_sec->output_offset |
| 12340 | + htab->toc_first_sec->output_section->vma); |
| 12341 | off = addr - elf_gp (info->output_bfd) + TOC_BASE_OFF; |
| 12342 | elf_gp (isec->owner) = off; |
| 12343 | |
| 12344 | return TRUE; |
| 12345 | } |
| 12346 | |
| 12347 | /* Called via elf_link_hash_traverse to merge GOT entries for global |
| 12348 | symbol H. */ |
| 12349 | |
| 12350 | static bfd_boolean |
| 12351 | merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED) |
| 12352 | { |
| 12353 | if (h->root.type == bfd_link_hash_indirect) |
| 12354 | return TRUE; |
| 12355 | |
| 12356 | merge_got_entries (&h->got.glist); |
| 12357 | |
| 12358 | return TRUE; |
| 12359 | } |
| 12360 | |
| 12361 | /* Called via elf_link_hash_traverse to allocate GOT entries for global |
| 12362 | symbol H. */ |
| 12363 | |
| 12364 | static bfd_boolean |
| 12365 | reallocate_got (struct elf_link_hash_entry *h, void *inf) |
| 12366 | { |
| 12367 | struct got_entry *gent; |
| 12368 | |
| 12369 | if (h->root.type == bfd_link_hash_indirect) |
| 12370 | return TRUE; |
| 12371 | |
| 12372 | for (gent = h->got.glist; gent != NULL; gent = gent->next) |
| 12373 | if (!gent->is_indirect) |
| 12374 | allocate_got (h, (struct bfd_link_info *) inf, gent); |
| 12375 | return TRUE; |
| 12376 | } |
| 12377 | |
| 12378 | /* Called on the first multitoc pass after the last call to |
| 12379 | ppc64_elf_next_toc_section. This function removes duplicate GOT |
| 12380 | entries. */ |
| 12381 | |
| 12382 | bfd_boolean |
| 12383 | ppc64_elf_layout_multitoc (struct bfd_link_info *info) |
| 12384 | { |
| 12385 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
| 12386 | struct bfd *ibfd, *ibfd2; |
| 12387 | bfd_boolean done_something; |
| 12388 | |
| 12389 | htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd); |
| 12390 | |
| 12391 | if (!htab->do_multi_toc) |
| 12392 | return FALSE; |
| 12393 | |
| 12394 | /* Merge global sym got entries within a toc group. */ |
| 12395 | elf_link_hash_traverse (&htab->elf, merge_global_got, info); |
| 12396 | |
| 12397 | /* And tlsld_got. */ |
| 12398 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
| 12399 | { |
| 12400 | struct got_entry *ent, *ent2; |
| 12401 | |
| 12402 | if (!is_ppc64_elf (ibfd)) |
| 12403 | continue; |
| 12404 | |
| 12405 | ent = ppc64_tlsld_got (ibfd); |
| 12406 | if (!ent->is_indirect |
| 12407 | && ent->got.offset != (bfd_vma) -1) |
| 12408 | { |
| 12409 | for (ibfd2 = ibfd->link.next; ibfd2 != NULL; ibfd2 = ibfd2->link.next) |
| 12410 | { |
| 12411 | if (!is_ppc64_elf (ibfd2)) |
| 12412 | continue; |
| 12413 | |
| 12414 | ent2 = ppc64_tlsld_got (ibfd2); |
| 12415 | if (!ent2->is_indirect |
| 12416 | && ent2->got.offset != (bfd_vma) -1 |
| 12417 | && elf_gp (ibfd2) == elf_gp (ibfd)) |
| 12418 | { |
| 12419 | ent2->is_indirect = TRUE; |
| 12420 | ent2->got.ent = ent; |
| 12421 | } |
| 12422 | } |
| 12423 | } |
| 12424 | } |
| 12425 | |
| 12426 | /* Zap sizes of got sections. */ |
| 12427 | htab->elf.irelplt->rawsize = htab->elf.irelplt->size; |
| 12428 | htab->elf.irelplt->size -= htab->got_reli_size; |
| 12429 | htab->got_reli_size = 0; |
| 12430 | |
| 12431 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
| 12432 | { |
| 12433 | asection *got, *relgot; |
| 12434 | |
| 12435 | if (!is_ppc64_elf (ibfd)) |
| 12436 | continue; |
| 12437 | |
| 12438 | got = ppc64_elf_tdata (ibfd)->got; |
| 12439 | if (got != NULL) |
| 12440 | { |
| 12441 | got->rawsize = got->size; |
| 12442 | got->size = 0; |
| 12443 | relgot = ppc64_elf_tdata (ibfd)->relgot; |
| 12444 | relgot->rawsize = relgot->size; |
| 12445 | relgot->size = 0; |
| 12446 | } |
| 12447 | } |
| 12448 | |
| 12449 | /* Now reallocate the got, local syms first. We don't need to |
| 12450 | allocate section contents again since we never increase size. */ |
| 12451 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
| 12452 | { |
| 12453 | struct got_entry **lgot_ents; |
| 12454 | struct got_entry **end_lgot_ents; |
| 12455 | struct plt_entry **local_plt; |
| 12456 | struct plt_entry **end_local_plt; |
| 12457 | unsigned char *lgot_masks; |
| 12458 | bfd_size_type locsymcount; |
| 12459 | Elf_Internal_Shdr *symtab_hdr; |
| 12460 | asection *s; |
| 12461 | |
| 12462 | if (!is_ppc64_elf (ibfd)) |
| 12463 | continue; |
| 12464 | |
| 12465 | lgot_ents = elf_local_got_ents (ibfd); |
| 12466 | if (!lgot_ents) |
| 12467 | continue; |
| 12468 | |
| 12469 | symtab_hdr = &elf_symtab_hdr (ibfd); |
| 12470 | locsymcount = symtab_hdr->sh_info; |
| 12471 | end_lgot_ents = lgot_ents + locsymcount; |
| 12472 | local_plt = (struct plt_entry **) end_lgot_ents; |
| 12473 | end_local_plt = local_plt + locsymcount; |
| 12474 | lgot_masks = (unsigned char *) end_local_plt; |
| 12475 | s = ppc64_elf_tdata (ibfd)->got; |
| 12476 | for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks) |
| 12477 | { |
| 12478 | struct got_entry *ent; |
| 12479 | |
| 12480 | for (ent = *lgot_ents; ent != NULL; ent = ent->next) |
| 12481 | { |
| 12482 | unsigned int ent_size = 8; |
| 12483 | unsigned int rel_size = sizeof (Elf64_External_Rela); |
| 12484 | |
| 12485 | ent->got.offset = s->size; |
| 12486 | if ((ent->tls_type & *lgot_masks & TLS_GD) != 0) |
| 12487 | { |
| 12488 | ent_size *= 2; |
| 12489 | rel_size *= 2; |
| 12490 | } |
| 12491 | s->size += ent_size; |
| 12492 | if ((*lgot_masks & (TLS_TLS | PLT_IFUNC)) == PLT_IFUNC) |
| 12493 | { |
| 12494 | htab->elf.irelplt->size += rel_size; |
| 12495 | htab->got_reli_size += rel_size; |
| 12496 | } |
| 12497 | else if (bfd_link_pic (info) |
| 12498 | && !(ent->tls_type != 0 |
| 12499 | && bfd_link_executable (info))) |
| 12500 | { |
| 12501 | asection *srel = ppc64_elf_tdata (ibfd)->relgot; |
| 12502 | srel->size += rel_size; |
| 12503 | } |
| 12504 | } |
| 12505 | } |
| 12506 | } |
| 12507 | |
| 12508 | elf_link_hash_traverse (&htab->elf, reallocate_got, info); |
| 12509 | |
| 12510 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
| 12511 | { |
| 12512 | struct got_entry *ent; |
| 12513 | |
| 12514 | if (!is_ppc64_elf (ibfd)) |
| 12515 | continue; |
| 12516 | |
| 12517 | ent = ppc64_tlsld_got (ibfd); |
| 12518 | if (!ent->is_indirect |
| 12519 | && ent->got.offset != (bfd_vma) -1) |
| 12520 | { |
| 12521 | asection *s = ppc64_elf_tdata (ibfd)->got; |
| 12522 | ent->got.offset = s->size; |
| 12523 | s->size += 16; |
| 12524 | if (bfd_link_dll (info)) |
| 12525 | { |
| 12526 | asection *srel = ppc64_elf_tdata (ibfd)->relgot; |
| 12527 | srel->size += sizeof (Elf64_External_Rela); |
| 12528 | } |
| 12529 | } |
| 12530 | } |
| 12531 | |
| 12532 | done_something = htab->elf.irelplt->rawsize != htab->elf.irelplt->size; |
| 12533 | if (!done_something) |
| 12534 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
| 12535 | { |
| 12536 | asection *got; |
| 12537 | |
| 12538 | if (!is_ppc64_elf (ibfd)) |
| 12539 | continue; |
| 12540 | |
| 12541 | got = ppc64_elf_tdata (ibfd)->got; |
| 12542 | if (got != NULL) |
| 12543 | { |
| 12544 | done_something = got->rawsize != got->size; |
| 12545 | if (done_something) |
| 12546 | break; |
| 12547 | } |
| 12548 | } |
| 12549 | |
| 12550 | if (done_something) |
| 12551 | (*htab->params->layout_sections_again) (); |
| 12552 | |
| 12553 | /* Set up for second pass over toc sections to recalculate elf_gp |
| 12554 | on input sections. */ |
| 12555 | htab->toc_bfd = NULL; |
| 12556 | htab->toc_first_sec = NULL; |
| 12557 | htab->second_toc_pass = TRUE; |
| 12558 | return done_something; |
| 12559 | } |
| 12560 | |
| 12561 | /* Called after second pass of multitoc partitioning. */ |
| 12562 | |
| 12563 | void |
| 12564 | ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info) |
| 12565 | { |
| 12566 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
| 12567 | |
| 12568 | /* After the second pass, toc_curr tracks the TOC offset used |
| 12569 | for code sections below in ppc64_elf_next_input_section. */ |
| 12570 | htab->toc_curr = TOC_BASE_OFF; |
| 12571 | } |
| 12572 | |
| 12573 | /* No toc references were found in ISEC. If the code in ISEC makes no |
| 12574 | calls, then there's no need to use toc adjusting stubs when branching |
| 12575 | into ISEC. Actually, indirect calls from ISEC are OK as they will |
| 12576 | load r2. Returns -1 on error, 0 for no stub needed, 1 for stub |
| 12577 | needed, and 2 if a cyclical call-graph was found but no other reason |
| 12578 | for a stub was detected. If called from the top level, a return of |
| 12579 | 2 means the same as a return of 0. */ |
| 12580 | |
| 12581 | static int |
| 12582 | toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec) |
| 12583 | { |
| 12584 | int ret; |
| 12585 | |
| 12586 | /* Mark this section as checked. */ |
| 12587 | isec->call_check_done = 1; |
| 12588 | |
| 12589 | /* We know none of our code bearing sections will need toc stubs. */ |
| 12590 | if ((isec->flags & SEC_LINKER_CREATED) != 0) |
| 12591 | return 0; |
| 12592 | |
| 12593 | if (isec->size == 0) |
| 12594 | return 0; |
| 12595 | |
| 12596 | if (isec->output_section == NULL) |
| 12597 | return 0; |
| 12598 | |
| 12599 | ret = 0; |
| 12600 | if (isec->reloc_count != 0) |
| 12601 | { |
| 12602 | Elf_Internal_Rela *relstart, *rel; |
| 12603 | Elf_Internal_Sym *local_syms; |
| 12604 | struct ppc_link_hash_table *htab; |
| 12605 | |
| 12606 | relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL, |
| 12607 | info->keep_memory); |
| 12608 | if (relstart == NULL) |
| 12609 | return -1; |
| 12610 | |
| 12611 | /* Look for branches to outside of this section. */ |
| 12612 | local_syms = NULL; |
| 12613 | htab = ppc_hash_table (info); |
| 12614 | if (htab == NULL) |
| 12615 | return -1; |
| 12616 | |
| 12617 | for (rel = relstart; rel < relstart + isec->reloc_count; ++rel) |
| 12618 | { |
| 12619 | enum elf_ppc64_reloc_type r_type; |
| 12620 | unsigned long r_symndx; |
| 12621 | struct elf_link_hash_entry *h; |
| 12622 | struct ppc_link_hash_entry *eh; |
| 12623 | Elf_Internal_Sym *sym; |
| 12624 | asection *sym_sec; |
| 12625 | struct _opd_sec_data *opd; |
| 12626 | bfd_vma sym_value; |
| 12627 | bfd_vma dest; |
| 12628 | |
| 12629 | r_type = ELF64_R_TYPE (rel->r_info); |
| 12630 | if (r_type != R_PPC64_REL24 |
| 12631 | && r_type != R_PPC64_REL24_NOTOC |
| 12632 | && r_type != R_PPC64_REL14 |
| 12633 | && r_type != R_PPC64_REL14_BRTAKEN |
| 12634 | && r_type != R_PPC64_REL14_BRNTAKEN |
| 12635 | && r_type != R_PPC64_PLTCALL |
| 12636 | && r_type != R_PPC64_PLTCALL_NOTOC) |
| 12637 | continue; |
| 12638 | |
| 12639 | r_symndx = ELF64_R_SYM (rel->r_info); |
| 12640 | if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx, |
| 12641 | isec->owner)) |
| 12642 | { |
| 12643 | ret = -1; |
| 12644 | break; |
| 12645 | } |
| 12646 | |
| 12647 | /* Calls to dynamic lib functions go through a plt call stub |
| 12648 | that uses r2. */ |
| 12649 | eh = ppc_elf_hash_entry (h); |
| 12650 | if (eh != NULL |
| 12651 | && (eh->elf.plt.plist != NULL |
| 12652 | || (eh->oh != NULL |
| 12653 | && ppc_follow_link (eh->oh)->elf.plt.plist != NULL))) |
| 12654 | { |
| 12655 | ret = 1; |
| 12656 | break; |
| 12657 | } |
| 12658 | |
| 12659 | if (sym_sec == NULL) |
| 12660 | /* Ignore other undefined symbols. */ |
| 12661 | continue; |
| 12662 | |
| 12663 | /* Assume branches to other sections not included in the |
| 12664 | link need stubs too, to cover -R and absolute syms. */ |
| 12665 | if (sym_sec->output_section == NULL) |
| 12666 | { |
| 12667 | ret = 1; |
| 12668 | break; |
| 12669 | } |
| 12670 | |
| 12671 | if (h == NULL) |
| 12672 | sym_value = sym->st_value; |
| 12673 | else |
| 12674 | { |
| 12675 | if (h->root.type != bfd_link_hash_defined |
| 12676 | && h->root.type != bfd_link_hash_defweak) |
| 12677 | abort (); |
| 12678 | sym_value = h->root.u.def.value; |
| 12679 | } |
| 12680 | sym_value += rel->r_addend; |
| 12681 | |
| 12682 | /* If this branch reloc uses an opd sym, find the code section. */ |
| 12683 | opd = get_opd_info (sym_sec); |
| 12684 | if (opd != NULL) |
| 12685 | { |
| 12686 | if (h == NULL && opd->adjust != NULL) |
| 12687 | { |
| 12688 | long adjust; |
| 12689 | |
| 12690 | adjust = opd->adjust[OPD_NDX (sym_value)]; |
| 12691 | if (adjust == -1) |
| 12692 | /* Assume deleted functions won't ever be called. */ |
| 12693 | continue; |
| 12694 | sym_value += adjust; |
| 12695 | } |
| 12696 | |
| 12697 | dest = opd_entry_value (sym_sec, sym_value, |
| 12698 | &sym_sec, NULL, FALSE); |
| 12699 | if (dest == (bfd_vma) -1) |
| 12700 | continue; |
| 12701 | } |
| 12702 | else |
| 12703 | dest = (sym_value |
| 12704 | + sym_sec->output_offset |
| 12705 | + sym_sec->output_section->vma); |
| 12706 | |
| 12707 | /* Ignore branch to self. */ |
| 12708 | if (sym_sec == isec) |
| 12709 | continue; |
| 12710 | |
| 12711 | /* If the called function uses the toc, we need a stub. */ |
| 12712 | if (sym_sec->has_toc_reloc |
| 12713 | || sym_sec->makes_toc_func_call) |
| 12714 | { |
| 12715 | ret = 1; |
| 12716 | break; |
| 12717 | } |
| 12718 | |
| 12719 | /* Assume any branch that needs a long branch stub might in fact |
| 12720 | need a plt_branch stub. A plt_branch stub uses r2. */ |
| 12721 | else if (dest - (isec->output_offset |
| 12722 | + isec->output_section->vma |
| 12723 | + rel->r_offset) + (1 << 25) |
| 12724 | >= (2u << 25) - PPC64_LOCAL_ENTRY_OFFSET (h |
| 12725 | ? h->other |
| 12726 | : sym->st_other)) |
| 12727 | { |
| 12728 | ret = 1; |
| 12729 | break; |
| 12730 | } |
| 12731 | |
| 12732 | /* If calling back to a section in the process of being |
| 12733 | tested, we can't say for sure that no toc adjusting stubs |
| 12734 | are needed, so don't return zero. */ |
| 12735 | else if (sym_sec->call_check_in_progress) |
| 12736 | ret = 2; |
| 12737 | |
| 12738 | /* Branches to another section that itself doesn't have any TOC |
| 12739 | references are OK. Recursively call ourselves to check. */ |
| 12740 | else if (!sym_sec->call_check_done) |
| 12741 | { |
| 12742 | int recur; |
| 12743 | |
| 12744 | /* Mark current section as indeterminate, so that other |
| 12745 | sections that call back to current won't be marked as |
| 12746 | known. */ |
| 12747 | isec->call_check_in_progress = 1; |
| 12748 | recur = toc_adjusting_stub_needed (info, sym_sec); |
| 12749 | isec->call_check_in_progress = 0; |
| 12750 | |
| 12751 | if (recur != 0) |
| 12752 | { |
| 12753 | ret = recur; |
| 12754 | if (recur != 2) |
| 12755 | break; |
| 12756 | } |
| 12757 | } |
| 12758 | } |
| 12759 | |
| 12760 | if (elf_symtab_hdr (isec->owner).contents |
| 12761 | != (unsigned char *) local_syms) |
| 12762 | free (local_syms); |
| 12763 | if (elf_section_data (isec)->relocs != relstart) |
| 12764 | free (relstart); |
| 12765 | } |
| 12766 | |
| 12767 | if ((ret & 1) == 0 |
| 12768 | && isec->map_head.s != NULL |
| 12769 | && (strcmp (isec->output_section->name, ".init") == 0 |
| 12770 | || strcmp (isec->output_section->name, ".fini") == 0)) |
| 12771 | { |
| 12772 | if (isec->map_head.s->has_toc_reloc |
| 12773 | || isec->map_head.s->makes_toc_func_call) |
| 12774 | ret = 1; |
| 12775 | else if (!isec->map_head.s->call_check_done) |
| 12776 | { |
| 12777 | int recur; |
| 12778 | isec->call_check_in_progress = 1; |
| 12779 | recur = toc_adjusting_stub_needed (info, isec->map_head.s); |
| 12780 | isec->call_check_in_progress = 0; |
| 12781 | if (recur != 0) |
| 12782 | ret = recur; |
| 12783 | } |
| 12784 | } |
| 12785 | |
| 12786 | if (ret == 1) |
| 12787 | isec->makes_toc_func_call = 1; |
| 12788 | |
| 12789 | return ret; |
| 12790 | } |
| 12791 | |
| 12792 | /* The linker repeatedly calls this function for each input section, |
| 12793 | in the order that input sections are linked into output sections. |
| 12794 | Build lists of input sections to determine groupings between which |
| 12795 | we may insert linker stubs. */ |
| 12796 | |
| 12797 | bfd_boolean |
| 12798 | ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec) |
| 12799 | { |
| 12800 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
| 12801 | |
| 12802 | if (htab == NULL) |
| 12803 | return FALSE; |
| 12804 | |
| 12805 | if ((isec->output_section->flags & SEC_CODE) != 0 |
| 12806 | && isec->output_section->id < htab->sec_info_arr_size) |
| 12807 | { |
| 12808 | /* This happens to make the list in reverse order, |
| 12809 | which is what we want. */ |
| 12810 | htab->sec_info[isec->id].u.list |
| 12811 | = htab->sec_info[isec->output_section->id].u.list; |
| 12812 | htab->sec_info[isec->output_section->id].u.list = isec; |
| 12813 | } |
| 12814 | |
| 12815 | if (htab->multi_toc_needed) |
| 12816 | { |
| 12817 | /* Analyse sections that aren't already flagged as needing a |
| 12818 | valid toc pointer. Exclude .fixup for the linux kernel. |
| 12819 | .fixup contains branches, but only back to the function that |
| 12820 | hit an exception. */ |
| 12821 | if (!(isec->has_toc_reloc |
| 12822 | || (isec->flags & SEC_CODE) == 0 |
| 12823 | || strcmp (isec->name, ".fixup") == 0 |
| 12824 | || isec->call_check_done)) |
| 12825 | { |
| 12826 | if (toc_adjusting_stub_needed (info, isec) < 0) |
| 12827 | return FALSE; |
| 12828 | } |
| 12829 | /* Make all sections use the TOC assigned for this object file. |
| 12830 | This will be wrong for pasted sections; We fix that in |
| 12831 | check_pasted_section(). */ |
| 12832 | if (elf_gp (isec->owner) != 0) |
| 12833 | htab->toc_curr = elf_gp (isec->owner); |
| 12834 | } |
| 12835 | |
| 12836 | htab->sec_info[isec->id].toc_off = htab->toc_curr; |
| 12837 | return TRUE; |
| 12838 | } |
| 12839 | |
| 12840 | /* Check that all .init and .fini sections use the same toc, if they |
| 12841 | have toc relocs. */ |
| 12842 | |
| 12843 | static bfd_boolean |
| 12844 | check_pasted_section (struct bfd_link_info *info, const char *name) |
| 12845 | { |
| 12846 | asection *o = bfd_get_section_by_name (info->output_bfd, name); |
| 12847 | |
| 12848 | if (o != NULL) |
| 12849 | { |
| 12850 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
| 12851 | bfd_vma toc_off = 0; |
| 12852 | asection *i; |
| 12853 | |
| 12854 | for (i = o->map_head.s; i != NULL; i = i->map_head.s) |
| 12855 | if (i->has_toc_reloc) |
| 12856 | { |
| 12857 | if (toc_off == 0) |
| 12858 | toc_off = htab->sec_info[i->id].toc_off; |
| 12859 | else if (toc_off != htab->sec_info[i->id].toc_off) |
| 12860 | return FALSE; |
| 12861 | } |
| 12862 | |
| 12863 | if (toc_off == 0) |
| 12864 | for (i = o->map_head.s; i != NULL; i = i->map_head.s) |
| 12865 | if (i->makes_toc_func_call) |
| 12866 | { |
| 12867 | toc_off = htab->sec_info[i->id].toc_off; |
| 12868 | break; |
| 12869 | } |
| 12870 | |
| 12871 | /* Make sure the whole pasted function uses the same toc offset. */ |
| 12872 | if (toc_off != 0) |
| 12873 | for (i = o->map_head.s; i != NULL; i = i->map_head.s) |
| 12874 | htab->sec_info[i->id].toc_off = toc_off; |
| 12875 | } |
| 12876 | return TRUE; |
| 12877 | } |
| 12878 | |
| 12879 | bfd_boolean |
| 12880 | ppc64_elf_check_init_fini (struct bfd_link_info *info) |
| 12881 | { |
| 12882 | return (check_pasted_section (info, ".init") |
| 12883 | & check_pasted_section (info, ".fini")); |
| 12884 | } |
| 12885 | |
| 12886 | /* See whether we can group stub sections together. Grouping stub |
| 12887 | sections may result in fewer stubs. More importantly, we need to |
| 12888 | put all .init* and .fini* stubs at the beginning of the .init or |
| 12889 | .fini output sections respectively, because glibc splits the |
| 12890 | _init and _fini functions into multiple parts. Putting a stub in |
| 12891 | the middle of a function is not a good idea. */ |
| 12892 | |
| 12893 | static bfd_boolean |
| 12894 | group_sections (struct bfd_link_info *info, |
| 12895 | bfd_size_type stub_group_size, |
| 12896 | bfd_boolean stubs_always_before_branch) |
| 12897 | { |
| 12898 | struct ppc_link_hash_table *htab; |
| 12899 | asection *osec; |
| 12900 | bfd_boolean suppress_size_errors; |
| 12901 | |
| 12902 | htab = ppc_hash_table (info); |
| 12903 | if (htab == NULL) |
| 12904 | return FALSE; |
| 12905 | |
| 12906 | suppress_size_errors = FALSE; |
| 12907 | if (stub_group_size == 1) |
| 12908 | { |
| 12909 | /* Default values. */ |
| 12910 | if (stubs_always_before_branch) |
| 12911 | stub_group_size = 0x1e00000; |
| 12912 | else |
| 12913 | stub_group_size = 0x1c00000; |
| 12914 | suppress_size_errors = TRUE; |
| 12915 | } |
| 12916 | |
| 12917 | for (osec = info->output_bfd->sections; osec != NULL; osec = osec->next) |
| 12918 | { |
| 12919 | asection *tail; |
| 12920 | |
| 12921 | if (osec->id >= htab->sec_info_arr_size) |
| 12922 | continue; |
| 12923 | |
| 12924 | tail = htab->sec_info[osec->id].u.list; |
| 12925 | while (tail != NULL) |
| 12926 | { |
| 12927 | asection *curr; |
| 12928 | asection *prev; |
| 12929 | bfd_size_type total; |
| 12930 | bfd_boolean big_sec; |
| 12931 | bfd_vma curr_toc; |
| 12932 | struct map_stub *group; |
| 12933 | bfd_size_type group_size; |
| 12934 | |
| 12935 | curr = tail; |
| 12936 | total = tail->size; |
| 12937 | group_size = (ppc64_elf_section_data (tail) != NULL |
| 12938 | && ppc64_elf_section_data (tail)->has_14bit_branch |
| 12939 | ? stub_group_size >> 10 : stub_group_size); |
| 12940 | |
| 12941 | big_sec = total > group_size; |
| 12942 | if (big_sec && !suppress_size_errors) |
| 12943 | /* xgettext:c-format */ |
| 12944 | _bfd_error_handler (_("%pB section %pA exceeds stub group size"), |
| 12945 | tail->owner, tail); |
| 12946 | curr_toc = htab->sec_info[tail->id].toc_off; |
| 12947 | |
| 12948 | while ((prev = htab->sec_info[curr->id].u.list) != NULL |
| 12949 | && ((total += curr->output_offset - prev->output_offset) |
| 12950 | < (ppc64_elf_section_data (prev) != NULL |
| 12951 | && ppc64_elf_section_data (prev)->has_14bit_branch |
| 12952 | ? (group_size = stub_group_size >> 10) : group_size)) |
| 12953 | && htab->sec_info[prev->id].toc_off == curr_toc) |
| 12954 | curr = prev; |
| 12955 | |
| 12956 | /* OK, the size from the start of CURR to the end is less |
| 12957 | than group_size and thus can be handled by one stub |
| 12958 | section. (or the tail section is itself larger than |
| 12959 | group_size, in which case we may be toast.) We should |
| 12960 | really be keeping track of the total size of stubs added |
| 12961 | here, as stubs contribute to the final output section |
| 12962 | size. That's a little tricky, and this way will only |
| 12963 | break if stubs added make the total size more than 2^25, |
| 12964 | ie. for the default stub_group_size, if stubs total more |
| 12965 | than 2097152 bytes, or nearly 75000 plt call stubs. */ |
| 12966 | group = bfd_alloc (curr->owner, sizeof (*group)); |
| 12967 | if (group == NULL) |
| 12968 | return FALSE; |
| 12969 | group->link_sec = curr; |
| 12970 | group->stub_sec = NULL; |
| 12971 | group->needs_save_res = 0; |
| 12972 | group->lr_restore = 0; |
| 12973 | group->eh_size = 0; |
| 12974 | group->eh_base = 0; |
| 12975 | group->next = htab->group; |
| 12976 | htab->group = group; |
| 12977 | do |
| 12978 | { |
| 12979 | prev = htab->sec_info[tail->id].u.list; |
| 12980 | /* Set up this stub group. */ |
| 12981 | htab->sec_info[tail->id].u.group = group; |
| 12982 | } |
| 12983 | while (tail != curr && (tail = prev) != NULL); |
| 12984 | |
| 12985 | /* But wait, there's more! Input sections up to group_size |
| 12986 | bytes before the stub section can be handled by it too. |
| 12987 | Don't do this if we have a really large section after the |
| 12988 | stubs, as adding more stubs increases the chance that |
| 12989 | branches may not reach into the stub section. */ |
| 12990 | if (!stubs_always_before_branch && !big_sec) |
| 12991 | { |
| 12992 | total = 0; |
| 12993 | while (prev != NULL |
| 12994 | && ((total += tail->output_offset - prev->output_offset) |
| 12995 | < (ppc64_elf_section_data (prev) != NULL |
| 12996 | && ppc64_elf_section_data (prev)->has_14bit_branch |
| 12997 | ? (group_size = stub_group_size >> 10) |
| 12998 | : group_size)) |
| 12999 | && htab->sec_info[prev->id].toc_off == curr_toc) |
| 13000 | { |
| 13001 | tail = prev; |
| 13002 | prev = htab->sec_info[tail->id].u.list; |
| 13003 | htab->sec_info[tail->id].u.group = group; |
| 13004 | } |
| 13005 | } |
| 13006 | tail = prev; |
| 13007 | } |
| 13008 | } |
| 13009 | return TRUE; |
| 13010 | } |
| 13011 | |
| 13012 | static const unsigned char glink_eh_frame_cie[] = |
| 13013 | { |
| 13014 | 0, 0, 0, 16, /* length. */ |
| 13015 | 0, 0, 0, 0, /* id. */ |
| 13016 | 1, /* CIE version. */ |
| 13017 | 'z', 'R', 0, /* Augmentation string. */ |
| 13018 | 4, /* Code alignment. */ |
| 13019 | 0x78, /* Data alignment. */ |
| 13020 | 65, /* RA reg. */ |
| 13021 | 1, /* Augmentation size. */ |
| 13022 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */ |
| 13023 | DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */ |
| 13024 | }; |
| 13025 | |
| 13026 | /* Stripping output sections is normally done before dynamic section |
| 13027 | symbols have been allocated. This function is called later, and |
| 13028 | handles cases like htab->brlt which is mapped to its own output |
| 13029 | section. */ |
| 13030 | |
| 13031 | static void |
| 13032 | maybe_strip_output (struct bfd_link_info *info, asection *isec) |
| 13033 | { |
| 13034 | if (isec->size == 0 |
| 13035 | && isec->output_section->size == 0 |
| 13036 | && !(isec->output_section->flags & SEC_KEEP) |
| 13037 | && !bfd_section_removed_from_list (info->output_bfd, |
| 13038 | isec->output_section) |
| 13039 | && elf_section_data (isec->output_section)->dynindx == 0) |
| 13040 | { |
| 13041 | isec->output_section->flags |= SEC_EXCLUDE; |
| 13042 | bfd_section_list_remove (info->output_bfd, isec->output_section); |
| 13043 | info->output_bfd->section_count--; |
| 13044 | } |
| 13045 | } |
| 13046 | |
| 13047 | /* Determine and set the size of the stub section for a final link. |
| 13048 | |
| 13049 | The basic idea here is to examine all the relocations looking for |
| 13050 | PC-relative calls to a target that is unreachable with a "bl" |
| 13051 | instruction. */ |
| 13052 | |
| 13053 | bfd_boolean |
| 13054 | ppc64_elf_size_stubs (struct bfd_link_info *info) |
| 13055 | { |
| 13056 | bfd_size_type stub_group_size; |
| 13057 | bfd_boolean stubs_always_before_branch; |
| 13058 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
| 13059 | |
| 13060 | if (htab == NULL) |
| 13061 | return FALSE; |
| 13062 | |
| 13063 | if (htab->params->plt_thread_safe == -1 && !bfd_link_executable (info)) |
| 13064 | htab->params->plt_thread_safe = 1; |
| 13065 | if (!htab->opd_abi) |
| 13066 | htab->params->plt_thread_safe = 0; |
| 13067 | else if (htab->params->plt_thread_safe == -1) |
| 13068 | { |
| 13069 | static const char *const thread_starter[] = |
| 13070 | { |
| 13071 | "pthread_create", |
| 13072 | /* libstdc++ */ |
| 13073 | "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE", |
| 13074 | /* librt */ |
| 13075 | "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio", |
| 13076 | "mq_notify", "create_timer", |
| 13077 | /* libanl */ |
| 13078 | "getaddrinfo_a", |
| 13079 | /* libgomp */ |
| 13080 | "GOMP_parallel", |
| 13081 | "GOMP_parallel_start", |
| 13082 | "GOMP_parallel_loop_static", |
| 13083 | "GOMP_parallel_loop_static_start", |
| 13084 | "GOMP_parallel_loop_dynamic", |
| 13085 | "GOMP_parallel_loop_dynamic_start", |
| 13086 | "GOMP_parallel_loop_guided", |
| 13087 | "GOMP_parallel_loop_guided_start", |
| 13088 | "GOMP_parallel_loop_runtime", |
| 13089 | "GOMP_parallel_loop_runtime_start", |
| 13090 | "GOMP_parallel_sections", |
| 13091 | "GOMP_parallel_sections_start", |
| 13092 | /* libgo */ |
| 13093 | "__go_go", |
| 13094 | }; |
| 13095 | unsigned i; |
| 13096 | |
| 13097 | for (i = 0; i < ARRAY_SIZE (thread_starter); i++) |
| 13098 | { |
| 13099 | struct elf_link_hash_entry *h; |
| 13100 | h = elf_link_hash_lookup (&htab->elf, thread_starter[i], |
| 13101 | FALSE, FALSE, TRUE); |
| 13102 | htab->params->plt_thread_safe = h != NULL && h->ref_regular; |
| 13103 | if (htab->params->plt_thread_safe) |
| 13104 | break; |
| 13105 | } |
| 13106 | } |
| 13107 | stubs_always_before_branch = htab->params->group_size < 0; |
| 13108 | if (htab->params->group_size < 0) |
| 13109 | stub_group_size = -htab->params->group_size; |
| 13110 | else |
| 13111 | stub_group_size = htab->params->group_size; |
| 13112 | |
| 13113 | if (!group_sections (info, stub_group_size, stubs_always_before_branch)) |
| 13114 | return FALSE; |
| 13115 | |
| 13116 | htab->tga_group = NULL; |
| 13117 | if (!htab->params->no_tls_get_addr_regsave |
| 13118 | && htab->tga_desc_fd != NULL |
| 13119 | && (htab->tga_desc_fd->elf.root.type == bfd_link_hash_undefined |
| 13120 | || htab->tga_desc_fd->elf.root.type == bfd_link_hash_undefweak) |
| 13121 | && htab->tls_get_addr_fd != NULL |
| 13122 | && is_static_defined (&htab->tls_get_addr_fd->elf)) |
| 13123 | { |
| 13124 | asection *sym_sec, *code_sec, *stub_sec; |
| 13125 | bfd_vma sym_value; |
| 13126 | struct _opd_sec_data *opd; |
| 13127 | |
| 13128 | sym_sec = htab->tls_get_addr_fd->elf.root.u.def.section; |
| 13129 | sym_value = defined_sym_val (&htab->tls_get_addr_fd->elf); |
| 13130 | code_sec = sym_sec; |
| 13131 | opd = get_opd_info (sym_sec); |
| 13132 | if (opd != NULL) |
| 13133 | opd_entry_value (sym_sec, sym_value, &code_sec, NULL, FALSE); |
| 13134 | htab->tga_group = htab->sec_info[code_sec->id].u.group; |
| 13135 | stub_sec = (*htab->params->add_stub_section) (".tga_desc.stub", |
| 13136 | htab->tga_group->link_sec); |
| 13137 | if (stub_sec == NULL) |
| 13138 | return FALSE; |
| 13139 | htab->tga_group->stub_sec = stub_sec; |
| 13140 | |
| 13141 | htab->tga_desc_fd->elf.root.type = bfd_link_hash_defined; |
| 13142 | htab->tga_desc_fd->elf.root.u.def.section = stub_sec; |
| 13143 | htab->tga_desc_fd->elf.root.u.def.value = 0; |
| 13144 | htab->tga_desc_fd->elf.type = STT_FUNC; |
| 13145 | htab->tga_desc_fd->elf.def_regular = 1; |
| 13146 | htab->tga_desc_fd->elf.non_elf = 0; |
| 13147 | _bfd_elf_link_hash_hide_symbol (info, &htab->tga_desc_fd->elf, TRUE); |
| 13148 | } |
| 13149 | |
| 13150 | #define STUB_SHRINK_ITER 20 |
| 13151 | /* Loop until no stubs added. After iteration 20 of this loop we may |
| 13152 | exit on a stub section shrinking. This is to break out of a |
| 13153 | pathological case where adding stubs on one iteration decreases |
| 13154 | section gaps (perhaps due to alignment), which then requires |
| 13155 | fewer or smaller stubs on the next iteration. */ |
| 13156 | |
| 13157 | while (1) |
| 13158 | { |
| 13159 | bfd *input_bfd; |
| 13160 | unsigned int bfd_indx; |
| 13161 | struct map_stub *group; |
| 13162 | |
| 13163 | htab->stub_iteration += 1; |
| 13164 | |
| 13165 | for (input_bfd = info->input_bfds, bfd_indx = 0; |
| 13166 | input_bfd != NULL; |
| 13167 | input_bfd = input_bfd->link.next, bfd_indx++) |
| 13168 | { |
| 13169 | Elf_Internal_Shdr *symtab_hdr; |
| 13170 | asection *section; |
| 13171 | Elf_Internal_Sym *local_syms = NULL; |
| 13172 | |
| 13173 | if (!is_ppc64_elf (input_bfd)) |
| 13174 | continue; |
| 13175 | |
| 13176 | /* We'll need the symbol table in a second. */ |
| 13177 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
| 13178 | if (symtab_hdr->sh_info == 0) |
| 13179 | continue; |
| 13180 | |
| 13181 | /* Walk over each section attached to the input bfd. */ |
| 13182 | for (section = input_bfd->sections; |
| 13183 | section != NULL; |
| 13184 | section = section->next) |
| 13185 | { |
| 13186 | Elf_Internal_Rela *internal_relocs, *irelaend, *irela; |
| 13187 | |
| 13188 | /* If there aren't any relocs, then there's nothing more |
| 13189 | to do. */ |
| 13190 | if ((section->flags & SEC_RELOC) == 0 |
| 13191 | || (section->flags & SEC_ALLOC) == 0 |
| 13192 | || (section->flags & SEC_LOAD) == 0 |
| 13193 | || (section->flags & SEC_CODE) == 0 |
| 13194 | || section->reloc_count == 0) |
| 13195 | continue; |
| 13196 | |
| 13197 | /* If this section is a link-once section that will be |
| 13198 | discarded, then don't create any stubs. */ |
| 13199 | if (section->output_section == NULL |
| 13200 | || section->output_section->owner != info->output_bfd) |
| 13201 | continue; |
| 13202 | |
| 13203 | /* Get the relocs. */ |
| 13204 | internal_relocs |
| 13205 | = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL, |
| 13206 | info->keep_memory); |
| 13207 | if (internal_relocs == NULL) |
| 13208 | goto error_ret_free_local; |
| 13209 | |
| 13210 | /* Now examine each relocation. */ |
| 13211 | irela = internal_relocs; |
| 13212 | irelaend = irela + section->reloc_count; |
| 13213 | for (; irela < irelaend; irela++) |
| 13214 | { |
| 13215 | enum elf_ppc64_reloc_type r_type; |
| 13216 | unsigned int r_indx; |
| 13217 | enum ppc_stub_type stub_type; |
| 13218 | struct ppc_stub_hash_entry *stub_entry; |
| 13219 | asection *sym_sec, *code_sec; |
| 13220 | bfd_vma sym_value, code_value; |
| 13221 | bfd_vma destination; |
| 13222 | unsigned long local_off; |
| 13223 | bfd_boolean ok_dest; |
| 13224 | struct ppc_link_hash_entry *hash; |
| 13225 | struct ppc_link_hash_entry *fdh; |
| 13226 | struct elf_link_hash_entry *h; |
| 13227 | Elf_Internal_Sym *sym; |
| 13228 | char *stub_name; |
| 13229 | const asection *id_sec; |
| 13230 | struct _opd_sec_data *opd; |
| 13231 | struct plt_entry *plt_ent; |
| 13232 | |
| 13233 | r_type = ELF64_R_TYPE (irela->r_info); |
| 13234 | r_indx = ELF64_R_SYM (irela->r_info); |
| 13235 | |
| 13236 | if (r_type >= R_PPC64_max) |
| 13237 | { |
| 13238 | bfd_set_error (bfd_error_bad_value); |
| 13239 | goto error_ret_free_internal; |
| 13240 | } |
| 13241 | |
| 13242 | /* Only look for stubs on branch instructions. */ |
| 13243 | if (r_type != R_PPC64_REL24 |
| 13244 | && r_type != R_PPC64_REL24_NOTOC |
| 13245 | && r_type != R_PPC64_REL14 |
| 13246 | && r_type != R_PPC64_REL14_BRTAKEN |
| 13247 | && r_type != R_PPC64_REL14_BRNTAKEN) |
| 13248 | continue; |
| 13249 | |
| 13250 | /* Now determine the call target, its name, value, |
| 13251 | section. */ |
| 13252 | if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, |
| 13253 | r_indx, input_bfd)) |
| 13254 | goto error_ret_free_internal; |
| 13255 | hash = ppc_elf_hash_entry (h); |
| 13256 | |
| 13257 | ok_dest = FALSE; |
| 13258 | fdh = NULL; |
| 13259 | sym_value = 0; |
| 13260 | if (hash == NULL) |
| 13261 | { |
| 13262 | sym_value = sym->st_value; |
| 13263 | if (sym_sec != NULL |
| 13264 | && sym_sec->output_section != NULL) |
| 13265 | ok_dest = TRUE; |
| 13266 | } |
| 13267 | else if (hash->elf.root.type == bfd_link_hash_defined |
| 13268 | || hash->elf.root.type == bfd_link_hash_defweak) |
| 13269 | { |
| 13270 | sym_value = hash->elf.root.u.def.value; |
| 13271 | if (sym_sec->output_section != NULL) |
| 13272 | ok_dest = TRUE; |
| 13273 | } |
| 13274 | else if (hash->elf.root.type == bfd_link_hash_undefweak |
| 13275 | || hash->elf.root.type == bfd_link_hash_undefined) |
| 13276 | { |
| 13277 | /* Recognise an old ABI func code entry sym, and |
| 13278 | use the func descriptor sym instead if it is |
| 13279 | defined. */ |
| 13280 | if (hash->elf.root.root.string[0] == '.' |
| 13281 | && hash->oh != NULL) |
| 13282 | { |
| 13283 | fdh = ppc_follow_link (hash->oh); |
| 13284 | if (fdh->elf.root.type == bfd_link_hash_defined |
| 13285 | || fdh->elf.root.type == bfd_link_hash_defweak) |
| 13286 | { |
| 13287 | sym_sec = fdh->elf.root.u.def.section; |
| 13288 | sym_value = fdh->elf.root.u.def.value; |
| 13289 | if (sym_sec->output_section != NULL) |
| 13290 | ok_dest = TRUE; |
| 13291 | } |
| 13292 | else |
| 13293 | fdh = NULL; |
| 13294 | } |
| 13295 | } |
| 13296 | else |
| 13297 | { |
| 13298 | bfd_set_error (bfd_error_bad_value); |
| 13299 | goto error_ret_free_internal; |
| 13300 | } |
| 13301 | |
| 13302 | destination = 0; |
| 13303 | local_off = 0; |
| 13304 | if (ok_dest) |
| 13305 | { |
| 13306 | sym_value += irela->r_addend; |
| 13307 | destination = (sym_value |
| 13308 | + sym_sec->output_offset |
| 13309 | + sym_sec->output_section->vma); |
| 13310 | local_off = PPC64_LOCAL_ENTRY_OFFSET (hash |
| 13311 | ? hash->elf.other |
| 13312 | : sym->st_other); |
| 13313 | } |
| 13314 | |
| 13315 | code_sec = sym_sec; |
| 13316 | code_value = sym_value; |
| 13317 | opd = get_opd_info (sym_sec); |
| 13318 | if (opd != NULL) |
| 13319 | { |
| 13320 | bfd_vma dest; |
| 13321 | |
| 13322 | if (hash == NULL && opd->adjust != NULL) |
| 13323 | { |
| 13324 | long adjust = opd->adjust[OPD_NDX (sym_value)]; |
| 13325 | if (adjust == -1) |
| 13326 | continue; |
| 13327 | code_value += adjust; |
| 13328 | sym_value += adjust; |
| 13329 | } |
| 13330 | dest = opd_entry_value (sym_sec, sym_value, |
| 13331 | &code_sec, &code_value, FALSE); |
| 13332 | if (dest != (bfd_vma) -1) |
| 13333 | { |
| 13334 | destination = dest; |
| 13335 | if (fdh != NULL) |
| 13336 | { |
| 13337 | /* Fixup old ABI sym to point at code |
| 13338 | entry. */ |
| 13339 | hash->elf.root.type = bfd_link_hash_defweak; |
| 13340 | hash->elf.root.u.def.section = code_sec; |
| 13341 | hash->elf.root.u.def.value = code_value; |
| 13342 | } |
| 13343 | } |
| 13344 | } |
| 13345 | |
| 13346 | /* Determine what (if any) linker stub is needed. */ |
| 13347 | plt_ent = NULL; |
| 13348 | stub_type = ppc_type_of_stub (section, irela, &hash, |
| 13349 | &plt_ent, destination, |
| 13350 | local_off); |
| 13351 | |
| 13352 | if (r_type == R_PPC64_REL24_NOTOC) |
| 13353 | { |
| 13354 | if (stub_type == ppc_stub_plt_call) |
| 13355 | stub_type = ppc_stub_plt_call_notoc; |
| 13356 | else if (stub_type == ppc_stub_long_branch |
| 13357 | || (code_sec != NULL |
| 13358 | && code_sec->output_section != NULL |
| 13359 | && (((hash ? hash->elf.other : sym->st_other) |
| 13360 | & STO_PPC64_LOCAL_MASK) |
| 13361 | > 1 << STO_PPC64_LOCAL_BIT))) |
| 13362 | stub_type = ppc_stub_long_branch_notoc; |
| 13363 | } |
| 13364 | else if (stub_type != ppc_stub_plt_call) |
| 13365 | { |
| 13366 | /* Check whether we need a TOC adjusting stub. |
| 13367 | Since the linker pastes together pieces from |
| 13368 | different object files when creating the |
| 13369 | _init and _fini functions, it may be that a |
| 13370 | call to what looks like a local sym is in |
| 13371 | fact a call needing a TOC adjustment. */ |
| 13372 | if ((code_sec != NULL |
| 13373 | && code_sec->output_section != NULL |
| 13374 | && (htab->sec_info[code_sec->id].toc_off |
| 13375 | != htab->sec_info[section->id].toc_off) |
| 13376 | && (code_sec->has_toc_reloc |
| 13377 | || code_sec->makes_toc_func_call)) |
| 13378 | || (((hash ? hash->elf.other : sym->st_other) |
| 13379 | & STO_PPC64_LOCAL_MASK) |
| 13380 | == 1 << STO_PPC64_LOCAL_BIT)) |
| 13381 | stub_type = ppc_stub_long_branch_r2off; |
| 13382 | } |
| 13383 | |
| 13384 | if (stub_type == ppc_stub_none) |
| 13385 | continue; |
| 13386 | |
| 13387 | /* __tls_get_addr calls might be eliminated. */ |
| 13388 | if (stub_type != ppc_stub_plt_call |
| 13389 | && stub_type != ppc_stub_plt_call_notoc |
| 13390 | && hash != NULL |
| 13391 | && is_tls_get_addr (&hash->elf, htab) |
| 13392 | && section->has_tls_reloc |
| 13393 | && irela != internal_relocs) |
| 13394 | { |
| 13395 | /* Get tls info. */ |
| 13396 | unsigned char *tls_mask; |
| 13397 | |
| 13398 | if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms, |
| 13399 | irela - 1, input_bfd)) |
| 13400 | goto error_ret_free_internal; |
| 13401 | if ((*tls_mask & TLS_TLS) != 0 |
| 13402 | && (*tls_mask & (TLS_GD | TLS_LD)) == 0) |
| 13403 | continue; |
| 13404 | } |
| 13405 | |
| 13406 | if (stub_type == ppc_stub_plt_call) |
| 13407 | { |
| 13408 | if (!htab->opd_abi |
| 13409 | && htab->params->plt_localentry0 != 0 |
| 13410 | && is_elfv2_localentry0 (&hash->elf)) |
| 13411 | htab->has_plt_localentry0 = 1; |
| 13412 | else if (irela + 1 < irelaend |
| 13413 | && irela[1].r_offset == irela->r_offset + 4 |
| 13414 | && (ELF64_R_TYPE (irela[1].r_info) |
| 13415 | == R_PPC64_TOCSAVE)) |
| 13416 | { |
| 13417 | if (!tocsave_find (htab, INSERT, |
| 13418 | &local_syms, irela + 1, input_bfd)) |
| 13419 | goto error_ret_free_internal; |
| 13420 | } |
| 13421 | else |
| 13422 | stub_type = ppc_stub_plt_call_r2save; |
| 13423 | } |
| 13424 | |
| 13425 | /* Support for grouping stub sections. */ |
| 13426 | id_sec = htab->sec_info[section->id].u.group->link_sec; |
| 13427 | |
| 13428 | /* Get the name of this stub. */ |
| 13429 | stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela); |
| 13430 | if (!stub_name) |
| 13431 | goto error_ret_free_internal; |
| 13432 | |
| 13433 | stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, |
| 13434 | stub_name, FALSE, FALSE); |
| 13435 | if (stub_entry != NULL) |
| 13436 | { |
| 13437 | enum ppc_stub_type old_type; |
| 13438 | /* A stub has already been created, but it may |
| 13439 | not be the required type. We shouldn't be |
| 13440 | transitioning from plt_call to long_branch |
| 13441 | stubs or vice versa, but we might be |
| 13442 | upgrading from plt_call to plt_call_r2save or |
| 13443 | from long_branch to long_branch_r2off. */ |
| 13444 | free (stub_name); |
| 13445 | old_type = stub_entry->stub_type; |
| 13446 | switch (old_type) |
| 13447 | { |
| 13448 | default: |
| 13449 | abort (); |
| 13450 | |
| 13451 | case ppc_stub_save_res: |
| 13452 | continue; |
| 13453 | |
| 13454 | case ppc_stub_plt_call: |
| 13455 | case ppc_stub_plt_call_r2save: |
| 13456 | case ppc_stub_plt_call_notoc: |
| 13457 | case ppc_stub_plt_call_both: |
| 13458 | if (stub_type == ppc_stub_plt_call) |
| 13459 | continue; |
| 13460 | else if (stub_type == ppc_stub_plt_call_r2save) |
| 13461 | { |
| 13462 | if (old_type == ppc_stub_plt_call_notoc) |
| 13463 | stub_type = ppc_stub_plt_call_both; |
| 13464 | } |
| 13465 | else if (stub_type == ppc_stub_plt_call_notoc) |
| 13466 | { |
| 13467 | if (old_type == ppc_stub_plt_call_r2save) |
| 13468 | stub_type = ppc_stub_plt_call_both; |
| 13469 | } |
| 13470 | else |
| 13471 | abort (); |
| 13472 | break; |
| 13473 | |
| 13474 | case ppc_stub_plt_branch: |
| 13475 | case ppc_stub_plt_branch_r2off: |
| 13476 | case ppc_stub_plt_branch_notoc: |
| 13477 | case ppc_stub_plt_branch_both: |
| 13478 | old_type += (ppc_stub_long_branch |
| 13479 | - ppc_stub_plt_branch); |
| 13480 | /* Fall through. */ |
| 13481 | case ppc_stub_long_branch: |
| 13482 | case ppc_stub_long_branch_r2off: |
| 13483 | case ppc_stub_long_branch_notoc: |
| 13484 | case ppc_stub_long_branch_both: |
| 13485 | if (stub_type == ppc_stub_long_branch) |
| 13486 | continue; |
| 13487 | else if (stub_type == ppc_stub_long_branch_r2off) |
| 13488 | { |
| 13489 | if (old_type == ppc_stub_long_branch_notoc) |
| 13490 | stub_type = ppc_stub_long_branch_both; |
| 13491 | } |
| 13492 | else if (stub_type == ppc_stub_long_branch_notoc) |
| 13493 | { |
| 13494 | if (old_type == ppc_stub_long_branch_r2off) |
| 13495 | stub_type = ppc_stub_long_branch_both; |
| 13496 | } |
| 13497 | else |
| 13498 | abort (); |
| 13499 | break; |
| 13500 | } |
| 13501 | if (old_type < stub_type) |
| 13502 | stub_entry->stub_type = stub_type; |
| 13503 | continue; |
| 13504 | } |
| 13505 | |
| 13506 | stub_entry = ppc_add_stub (stub_name, section, info); |
| 13507 | if (stub_entry == NULL) |
| 13508 | { |
| 13509 | free (stub_name); |
| 13510 | error_ret_free_internal: |
| 13511 | if (elf_section_data (section)->relocs == NULL) |
| 13512 | free (internal_relocs); |
| 13513 | error_ret_free_local: |
| 13514 | if (symtab_hdr->contents |
| 13515 | != (unsigned char *) local_syms) |
| 13516 | free (local_syms); |
| 13517 | return FALSE; |
| 13518 | } |
| 13519 | |
| 13520 | stub_entry->stub_type = stub_type; |
| 13521 | if (stub_type >= ppc_stub_plt_call |
| 13522 | && stub_type <= ppc_stub_plt_call_both) |
| 13523 | { |
| 13524 | stub_entry->target_value = sym_value; |
| 13525 | stub_entry->target_section = sym_sec; |
| 13526 | } |
| 13527 | else |
| 13528 | { |
| 13529 | stub_entry->target_value = code_value; |
| 13530 | stub_entry->target_section = code_sec; |
| 13531 | } |
| 13532 | stub_entry->h = hash; |
| 13533 | stub_entry->plt_ent = plt_ent; |
| 13534 | stub_entry->symtype |
| 13535 | = hash ? hash->elf.type : ELF_ST_TYPE (sym->st_info); |
| 13536 | stub_entry->other = hash ? hash->elf.other : sym->st_other; |
| 13537 | |
| 13538 | if (hash != NULL |
| 13539 | && (hash->elf.root.type == bfd_link_hash_defined |
| 13540 | || hash->elf.root.type == bfd_link_hash_defweak)) |
| 13541 | htab->stub_globals += 1; |
| 13542 | } |
| 13543 | |
| 13544 | /* We're done with the internal relocs, free them. */ |
| 13545 | if (elf_section_data (section)->relocs != internal_relocs) |
| 13546 | free (internal_relocs); |
| 13547 | } |
| 13548 | |
| 13549 | if (local_syms != NULL |
| 13550 | && symtab_hdr->contents != (unsigned char *) local_syms) |
| 13551 | { |
| 13552 | if (!info->keep_memory) |
| 13553 | free (local_syms); |
| 13554 | else |
| 13555 | symtab_hdr->contents = (unsigned char *) local_syms; |
| 13556 | } |
| 13557 | } |
| 13558 | |
| 13559 | /* We may have added some stubs. Find out the new size of the |
| 13560 | stub sections. */ |
| 13561 | for (group = htab->group; group != NULL; group = group->next) |
| 13562 | { |
| 13563 | group->lr_restore = 0; |
| 13564 | group->eh_size = 0; |
| 13565 | if (group->stub_sec != NULL) |
| 13566 | { |
| 13567 | asection *stub_sec = group->stub_sec; |
| 13568 | |
| 13569 | if (htab->stub_iteration <= STUB_SHRINK_ITER |
| 13570 | || stub_sec->rawsize < stub_sec->size) |
| 13571 | /* Past STUB_SHRINK_ITER, rawsize is the max size seen. */ |
| 13572 | stub_sec->rawsize = stub_sec->size; |
| 13573 | stub_sec->size = 0; |
| 13574 | stub_sec->reloc_count = 0; |
| 13575 | stub_sec->flags &= ~SEC_RELOC; |
| 13576 | } |
| 13577 | } |
| 13578 | if (htab->tga_group != NULL) |
| 13579 | { |
| 13580 | /* See emit_tga_desc and emit_tga_desc_eh_frame. */ |
| 13581 | htab->tga_group->eh_size |
| 13582 | = 1 + 2 + (htab->opd_abi != 0) + 3 + 8 * 2 + 3 + 8 + 3; |
| 13583 | htab->tga_group->lr_restore = 23 * 4; |
| 13584 | htab->tga_group->stub_sec->size = 24 * 4; |
| 13585 | } |
| 13586 | |
| 13587 | if (htab->stub_iteration <= STUB_SHRINK_ITER |
| 13588 | || htab->brlt->rawsize < htab->brlt->size) |
| 13589 | htab->brlt->rawsize = htab->brlt->size; |
| 13590 | htab->brlt->size = 0; |
| 13591 | htab->brlt->reloc_count = 0; |
| 13592 | htab->brlt->flags &= ~SEC_RELOC; |
| 13593 | if (htab->relbrlt != NULL) |
| 13594 | htab->relbrlt->size = 0; |
| 13595 | |
| 13596 | bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info); |
| 13597 | |
| 13598 | for (group = htab->group; group != NULL; group = group->next) |
| 13599 | if (group->needs_save_res) |
| 13600 | group->stub_sec->size += htab->sfpr->size; |
| 13601 | |
| 13602 | if (info->emitrelocations |
| 13603 | && htab->glink != NULL && htab->glink->size != 0) |
| 13604 | { |
| 13605 | htab->glink->reloc_count = 1; |
| 13606 | htab->glink->flags |= SEC_RELOC; |
| 13607 | } |
| 13608 | |
| 13609 | if (htab->glink_eh_frame != NULL |
| 13610 | && !bfd_is_abs_section (htab->glink_eh_frame->output_section) |
| 13611 | && htab->glink_eh_frame->output_section->size > 8) |
| 13612 | { |
| 13613 | size_t size = 0, align = 4; |
| 13614 | |
| 13615 | for (group = htab->group; group != NULL; group = group->next) |
| 13616 | if (group->eh_size != 0) |
| 13617 | size += (group->eh_size + 17 + align - 1) & -align; |
| 13618 | if (htab->glink != NULL && htab->glink->size != 0) |
| 13619 | size += (24 + align - 1) & -align; |
| 13620 | if (size != 0) |
| 13621 | size += (sizeof (glink_eh_frame_cie) + align - 1) & -align; |
| 13622 | align = 1ul << htab->glink_eh_frame->output_section->alignment_power; |
| 13623 | size = (size + align - 1) & -align; |
| 13624 | htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size; |
| 13625 | htab->glink_eh_frame->size = size; |
| 13626 | } |
| 13627 | |
| 13628 | if (htab->params->plt_stub_align != 0) |
| 13629 | for (group = htab->group; group != NULL; group = group->next) |
| 13630 | if (group->stub_sec != NULL) |
| 13631 | { |
| 13632 | int align = abs (htab->params->plt_stub_align); |
| 13633 | group->stub_sec->size |
| 13634 | = (group->stub_sec->size + (1 << align) - 1) & -(1 << align); |
| 13635 | } |
| 13636 | |
| 13637 | for (group = htab->group; group != NULL; group = group->next) |
| 13638 | if (group->stub_sec != NULL |
| 13639 | && group->stub_sec->rawsize != group->stub_sec->size |
| 13640 | && (htab->stub_iteration <= STUB_SHRINK_ITER |
| 13641 | || group->stub_sec->rawsize < group->stub_sec->size)) |
| 13642 | break; |
| 13643 | |
| 13644 | if (group == NULL |
| 13645 | && (htab->brlt->rawsize == htab->brlt->size |
| 13646 | || (htab->stub_iteration > STUB_SHRINK_ITER |
| 13647 | && htab->brlt->rawsize > htab->brlt->size)) |
| 13648 | && (htab->glink_eh_frame == NULL |
| 13649 | || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size) |
| 13650 | && (htab->tga_group == NULL |
| 13651 | || htab->stub_iteration > 1)) |
| 13652 | break; |
| 13653 | |
| 13654 | /* Ask the linker to do its stuff. */ |
| 13655 | (*htab->params->layout_sections_again) (); |
| 13656 | } |
| 13657 | |
| 13658 | if (htab->glink_eh_frame != NULL |
| 13659 | && htab->glink_eh_frame->size != 0) |
| 13660 | { |
| 13661 | bfd_vma val; |
| 13662 | bfd_byte *p, *last_fde; |
| 13663 | size_t last_fde_len, size, align, pad; |
| 13664 | struct map_stub *group; |
| 13665 | |
| 13666 | /* It is necessary to at least have a rough outline of the |
| 13667 | linker generated CIEs and FDEs written before |
| 13668 | bfd_elf_discard_info is run, in order for these FDEs to be |
| 13669 | indexed in .eh_frame_hdr. */ |
| 13670 | p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size); |
| 13671 | if (p == NULL) |
| 13672 | return FALSE; |
| 13673 | htab->glink_eh_frame->contents = p; |
| 13674 | last_fde = p; |
| 13675 | align = 4; |
| 13676 | |
| 13677 | memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie)); |
| 13678 | /* CIE length (rewrite in case little-endian). */ |
| 13679 | last_fde_len = ((sizeof (glink_eh_frame_cie) + align - 1) & -align) - 4; |
| 13680 | bfd_put_32 (htab->elf.dynobj, last_fde_len, p); |
| 13681 | p += last_fde_len + 4; |
| 13682 | |
| 13683 | for (group = htab->group; group != NULL; group = group->next) |
| 13684 | if (group->eh_size != 0) |
| 13685 | { |
| 13686 | group->eh_base = p - htab->glink_eh_frame->contents; |
| 13687 | last_fde = p; |
| 13688 | last_fde_len = ((group->eh_size + 17 + align - 1) & -align) - 4; |
| 13689 | /* FDE length. */ |
| 13690 | bfd_put_32 (htab->elf.dynobj, last_fde_len, p); |
| 13691 | p += 4; |
| 13692 | /* CIE pointer. */ |
| 13693 | val = p - htab->glink_eh_frame->contents; |
| 13694 | bfd_put_32 (htab->elf.dynobj, val, p); |
| 13695 | p += 4; |
| 13696 | /* Offset to stub section, written later. */ |
| 13697 | p += 4; |
| 13698 | /* stub section size. */ |
| 13699 | bfd_put_32 (htab->elf.dynobj, group->stub_sec->size, p); |
| 13700 | p += 4; |
| 13701 | /* Augmentation. */ |
| 13702 | p += 1; |
| 13703 | /* Make sure we don't have all nops. This is enough for |
| 13704 | elf-eh-frame.c to detect the last non-nop opcode. */ |
| 13705 | p[group->eh_size - 1] = DW_CFA_advance_loc + 1; |
| 13706 | p = last_fde + last_fde_len + 4; |
| 13707 | } |
| 13708 | if (htab->glink != NULL && htab->glink->size != 0) |
| 13709 | { |
| 13710 | last_fde = p; |
| 13711 | last_fde_len = ((24 + align - 1) & -align) - 4; |
| 13712 | /* FDE length. */ |
| 13713 | bfd_put_32 (htab->elf.dynobj, last_fde_len, p); |
| 13714 | p += 4; |
| 13715 | /* CIE pointer. */ |
| 13716 | val = p - htab->glink_eh_frame->contents; |
| 13717 | bfd_put_32 (htab->elf.dynobj, val, p); |
| 13718 | p += 4; |
| 13719 | /* Offset to .glink, written later. */ |
| 13720 | p += 4; |
| 13721 | /* .glink size. */ |
| 13722 | bfd_put_32 (htab->elf.dynobj, htab->glink->size - 8, p); |
| 13723 | p += 4; |
| 13724 | /* Augmentation. */ |
| 13725 | p += 1; |
| 13726 | |
| 13727 | *p++ = DW_CFA_advance_loc + 1; |
| 13728 | *p++ = DW_CFA_register; |
| 13729 | *p++ = 65; |
| 13730 | *p++ = htab->opd_abi ? 12 : 0; |
| 13731 | *p++ = DW_CFA_advance_loc + (htab->opd_abi ? 5 : 7); |
| 13732 | *p++ = DW_CFA_restore_extended; |
| 13733 | *p++ = 65; |
| 13734 | p += ((24 + align - 1) & -align) - 24; |
| 13735 | } |
| 13736 | /* Subsume any padding into the last FDE if user .eh_frame |
| 13737 | sections are aligned more than glink_eh_frame. Otherwise any |
| 13738 | zero padding will be seen as a terminator. */ |
| 13739 | align = 1ul << htab->glink_eh_frame->output_section->alignment_power; |
| 13740 | size = p - htab->glink_eh_frame->contents; |
| 13741 | pad = ((size + align - 1) & -align) - size; |
| 13742 | htab->glink_eh_frame->size = size + pad; |
| 13743 | bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde); |
| 13744 | } |
| 13745 | |
| 13746 | maybe_strip_output (info, htab->brlt); |
| 13747 | if (htab->relbrlt != NULL) |
| 13748 | maybe_strip_output (info, htab->relbrlt); |
| 13749 | if (htab->glink_eh_frame != NULL) |
| 13750 | maybe_strip_output (info, htab->glink_eh_frame); |
| 13751 | |
| 13752 | return TRUE; |
| 13753 | } |
| 13754 | |
| 13755 | /* Called after we have determined section placement. If sections |
| 13756 | move, we'll be called again. Provide a value for TOCstart. */ |
| 13757 | |
| 13758 | bfd_vma |
| 13759 | ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd) |
| 13760 | { |
| 13761 | asection *s; |
| 13762 | bfd_vma TOCstart, adjust; |
| 13763 | |
| 13764 | if (info != NULL) |
| 13765 | { |
| 13766 | struct elf_link_hash_entry *h; |
| 13767 | struct elf_link_hash_table *htab = elf_hash_table (info); |
| 13768 | |
| 13769 | if (is_elf_hash_table (htab) |
| 13770 | && htab->hgot != NULL) |
| 13771 | h = htab->hgot; |
| 13772 | else |
| 13773 | { |
| 13774 | h = elf_link_hash_lookup (htab, ".TOC.", FALSE, FALSE, TRUE); |
| 13775 | if (is_elf_hash_table (htab)) |
| 13776 | htab->hgot = h; |
| 13777 | } |
| 13778 | if (h != NULL |
| 13779 | && h->root.type == bfd_link_hash_defined |
| 13780 | && !h->root.linker_def |
| 13781 | && (!is_elf_hash_table (htab) |
| 13782 | || h->def_regular)) |
| 13783 | { |
| 13784 | TOCstart = defined_sym_val (h) - TOC_BASE_OFF; |
| 13785 | _bfd_set_gp_value (obfd, TOCstart); |
| 13786 | return TOCstart; |
| 13787 | } |
| 13788 | } |
| 13789 | |
| 13790 | /* The TOC consists of sections .got, .toc, .tocbss, .plt in that |
| 13791 | order. The TOC starts where the first of these sections starts. */ |
| 13792 | s = bfd_get_section_by_name (obfd, ".got"); |
| 13793 | if (s == NULL || (s->flags & SEC_EXCLUDE) != 0) |
| 13794 | s = bfd_get_section_by_name (obfd, ".toc"); |
| 13795 | if (s == NULL || (s->flags & SEC_EXCLUDE) != 0) |
| 13796 | s = bfd_get_section_by_name (obfd, ".tocbss"); |
| 13797 | if (s == NULL || (s->flags & SEC_EXCLUDE) != 0) |
| 13798 | s = bfd_get_section_by_name (obfd, ".plt"); |
| 13799 | if (s == NULL || (s->flags & SEC_EXCLUDE) != 0) |
| 13800 | { |
| 13801 | /* This may happen for |
| 13802 | o references to TOC base (SYM@toc / TOC[tc0]) without a |
| 13803 | .toc directive |
| 13804 | o bad linker script |
| 13805 | o --gc-sections and empty TOC sections |
| 13806 | |
| 13807 | FIXME: Warn user? */ |
| 13808 | |
| 13809 | /* Look for a likely section. We probably won't even be |
| 13810 | using TOCstart. */ |
| 13811 | for (s = obfd->sections; s != NULL; s = s->next) |
| 13812 | if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY |
| 13813 | | SEC_EXCLUDE)) |
| 13814 | == (SEC_ALLOC | SEC_SMALL_DATA)) |
| 13815 | break; |
| 13816 | if (s == NULL) |
| 13817 | for (s = obfd->sections; s != NULL; s = s->next) |
| 13818 | if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE)) |
| 13819 | == (SEC_ALLOC | SEC_SMALL_DATA)) |
| 13820 | break; |
| 13821 | if (s == NULL) |
| 13822 | for (s = obfd->sections; s != NULL; s = s->next) |
| 13823 | if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE)) |
| 13824 | == SEC_ALLOC) |
| 13825 | break; |
| 13826 | if (s == NULL) |
| 13827 | for (s = obfd->sections; s != NULL; s = s->next) |
| 13828 | if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC) |
| 13829 | break; |
| 13830 | } |
| 13831 | |
| 13832 | TOCstart = 0; |
| 13833 | if (s != NULL) |
| 13834 | TOCstart = s->output_section->vma + s->output_offset; |
| 13835 | |
| 13836 | /* Force alignment. */ |
| 13837 | adjust = TOCstart & (TOC_BASE_ALIGN - 1); |
| 13838 | TOCstart -= adjust; |
| 13839 | _bfd_set_gp_value (obfd, TOCstart); |
| 13840 | |
| 13841 | if (info != NULL && s != NULL) |
| 13842 | { |
| 13843 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
| 13844 | |
| 13845 | if (htab != NULL) |
| 13846 | { |
| 13847 | if (htab->elf.hgot != NULL) |
| 13848 | { |
| 13849 | htab->elf.hgot->root.u.def.value = TOC_BASE_OFF - adjust; |
| 13850 | htab->elf.hgot->root.u.def.section = s; |
| 13851 | } |
| 13852 | } |
| 13853 | else |
| 13854 | { |
| 13855 | struct bfd_link_hash_entry *bh = NULL; |
| 13856 | _bfd_generic_link_add_one_symbol (info, obfd, ".TOC.", BSF_GLOBAL, |
| 13857 | s, TOC_BASE_OFF - adjust, |
| 13858 | NULL, FALSE, FALSE, &bh); |
| 13859 | } |
| 13860 | } |
| 13861 | return TOCstart; |
| 13862 | } |
| 13863 | |
| 13864 | /* Called via elf_link_hash_traverse from ppc64_elf_build_stubs to |
| 13865 | write out any global entry stubs, and PLT relocations. */ |
| 13866 | |
| 13867 | static bfd_boolean |
| 13868 | build_global_entry_stubs_and_plt (struct elf_link_hash_entry *h, void *inf) |
| 13869 | { |
| 13870 | struct bfd_link_info *info; |
| 13871 | struct ppc_link_hash_table *htab; |
| 13872 | struct plt_entry *ent; |
| 13873 | asection *s; |
| 13874 | |
| 13875 | if (h->root.type == bfd_link_hash_indirect) |
| 13876 | return TRUE; |
| 13877 | |
| 13878 | info = inf; |
| 13879 | htab = ppc_hash_table (info); |
| 13880 | if (htab == NULL) |
| 13881 | return FALSE; |
| 13882 | |
| 13883 | for (ent = h->plt.plist; ent != NULL; ent = ent->next) |
| 13884 | if (ent->plt.offset != (bfd_vma) -1) |
| 13885 | { |
| 13886 | /* This symbol has an entry in the procedure linkage |
| 13887 | table. Set it up. */ |
| 13888 | Elf_Internal_Rela rela; |
| 13889 | asection *plt, *relplt; |
| 13890 | bfd_byte *loc; |
| 13891 | |
| 13892 | if (!htab->elf.dynamic_sections_created |
| 13893 | || h->dynindx == -1) |
| 13894 | { |
| 13895 | if (!(h->def_regular |
| 13896 | && (h->root.type == bfd_link_hash_defined |
| 13897 | || h->root.type == bfd_link_hash_defweak))) |
| 13898 | continue; |
| 13899 | if (h->type == STT_GNU_IFUNC) |
| 13900 | { |
| 13901 | plt = htab->elf.iplt; |
| 13902 | relplt = htab->elf.irelplt; |
| 13903 | htab->local_ifunc_resolver = 1; |
| 13904 | if (htab->opd_abi) |
| 13905 | rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL); |
| 13906 | else |
| 13907 | rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE); |
| 13908 | } |
| 13909 | else |
| 13910 | { |
| 13911 | plt = htab->pltlocal; |
| 13912 | if (bfd_link_pic (info)) |
| 13913 | { |
| 13914 | relplt = htab->relpltlocal; |
| 13915 | if (htab->opd_abi) |
| 13916 | rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_SLOT); |
| 13917 | else |
| 13918 | rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); |
| 13919 | } |
| 13920 | else |
| 13921 | relplt = NULL; |
| 13922 | } |
| 13923 | rela.r_addend = defined_sym_val (h) + ent->addend; |
| 13924 | |
| 13925 | if (relplt == NULL) |
| 13926 | { |
| 13927 | loc = plt->contents + ent->plt.offset; |
| 13928 | bfd_put_64 (info->output_bfd, rela.r_addend, loc); |
| 13929 | if (htab->opd_abi) |
| 13930 | { |
| 13931 | bfd_vma toc = elf_gp (info->output_bfd); |
| 13932 | toc += htab->sec_info[h->root.u.def.section->id].toc_off; |
| 13933 | bfd_put_64 (info->output_bfd, toc, loc + 8); |
| 13934 | } |
| 13935 | } |
| 13936 | else |
| 13937 | { |
| 13938 | rela.r_offset = (plt->output_section->vma |
| 13939 | + plt->output_offset |
| 13940 | + ent->plt.offset); |
| 13941 | loc = relplt->contents + (relplt->reloc_count++ |
| 13942 | * sizeof (Elf64_External_Rela)); |
| 13943 | bfd_elf64_swap_reloca_out (info->output_bfd, &rela, loc); |
| 13944 | } |
| 13945 | } |
| 13946 | else |
| 13947 | { |
| 13948 | rela.r_offset = (htab->elf.splt->output_section->vma |
| 13949 | + htab->elf.splt->output_offset |
| 13950 | + ent->plt.offset); |
| 13951 | rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT); |
| 13952 | rela.r_addend = ent->addend; |
| 13953 | loc = (htab->elf.srelplt->contents |
| 13954 | + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE (htab)) |
| 13955 | / PLT_ENTRY_SIZE (htab) * sizeof (Elf64_External_Rela))); |
| 13956 | if (h->type == STT_GNU_IFUNC && is_static_defined (h)) |
| 13957 | htab->maybe_local_ifunc_resolver = 1; |
| 13958 | bfd_elf64_swap_reloca_out (info->output_bfd, &rela, loc); |
| 13959 | } |
| 13960 | } |
| 13961 | |
| 13962 | if (!h->pointer_equality_needed) |
| 13963 | return TRUE; |
| 13964 | |
| 13965 | if (h->def_regular) |
| 13966 | return TRUE; |
| 13967 | |
| 13968 | s = htab->global_entry; |
| 13969 | if (s == NULL || s->size == 0) |
| 13970 | return TRUE; |
| 13971 | |
| 13972 | for (ent = h->plt.plist; ent != NULL; ent = ent->next) |
| 13973 | if (ent->plt.offset != (bfd_vma) -1 |
| 13974 | && ent->addend == 0) |
| 13975 | { |
| 13976 | bfd_byte *p; |
| 13977 | asection *plt; |
| 13978 | bfd_vma off; |
| 13979 | |
| 13980 | p = s->contents + h->root.u.def.value; |
| 13981 | plt = htab->elf.splt; |
| 13982 | if (!htab->elf.dynamic_sections_created |
| 13983 | || h->dynindx == -1) |
| 13984 | { |
| 13985 | if (h->type == STT_GNU_IFUNC) |
| 13986 | plt = htab->elf.iplt; |
| 13987 | else |
| 13988 | plt = htab->pltlocal; |
| 13989 | } |
| 13990 | off = ent->plt.offset + plt->output_offset + plt->output_section->vma; |
| 13991 | off -= h->root.u.def.value + s->output_offset + s->output_section->vma; |
| 13992 | |
| 13993 | if (off + 0x80008000 > 0xffffffff || (off & 3) != 0) |
| 13994 | { |
| 13995 | info->callbacks->einfo |
| 13996 | (_("%P: linkage table error against `%pT'\n"), |
| 13997 | h->root.root.string); |
| 13998 | bfd_set_error (bfd_error_bad_value); |
| 13999 | htab->stub_error = TRUE; |
| 14000 | } |
| 14001 | |
| 14002 | htab->stub_count[ppc_stub_global_entry - 1] += 1; |
| 14003 | if (htab->params->emit_stub_syms) |
| 14004 | { |
| 14005 | size_t len = strlen (h->root.root.string); |
| 14006 | char *name = bfd_malloc (sizeof "12345678.global_entry." + len); |
| 14007 | |
| 14008 | if (name == NULL) |
| 14009 | return FALSE; |
| 14010 | |
| 14011 | sprintf (name, "%08x.global_entry.%s", s->id, h->root.root.string); |
| 14012 | h = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE); |
| 14013 | if (h == NULL) |
| 14014 | return FALSE; |
| 14015 | if (h->root.type == bfd_link_hash_new) |
| 14016 | { |
| 14017 | h->root.type = bfd_link_hash_defined; |
| 14018 | h->root.u.def.section = s; |
| 14019 | h->root.u.def.value = p - s->contents; |
| 14020 | h->ref_regular = 1; |
| 14021 | h->def_regular = 1; |
| 14022 | h->ref_regular_nonweak = 1; |
| 14023 | h->forced_local = 1; |
| 14024 | h->non_elf = 0; |
| 14025 | h->root.linker_def = 1; |
| 14026 | } |
| 14027 | } |
| 14028 | |
| 14029 | if (PPC_HA (off) != 0) |
| 14030 | { |
| 14031 | bfd_put_32 (s->owner, ADDIS_R12_R12 | PPC_HA (off), p); |
| 14032 | p += 4; |
| 14033 | } |
| 14034 | bfd_put_32 (s->owner, LD_R12_0R12 | PPC_LO (off), p); |
| 14035 | p += 4; |
| 14036 | bfd_put_32 (s->owner, MTCTR_R12, p); |
| 14037 | p += 4; |
| 14038 | bfd_put_32 (s->owner, BCTR, p); |
| 14039 | break; |
| 14040 | } |
| 14041 | return TRUE; |
| 14042 | } |
| 14043 | |
| 14044 | /* Write PLT relocs for locals. */ |
| 14045 | |
| 14046 | static bfd_boolean |
| 14047 | write_plt_relocs_for_local_syms (struct bfd_link_info *info) |
| 14048 | { |
| 14049 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
| 14050 | bfd *ibfd; |
| 14051 | |
| 14052 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
| 14053 | { |
| 14054 | struct got_entry **lgot_ents, **end_lgot_ents; |
| 14055 | struct plt_entry **local_plt, **lplt, **end_local_plt; |
| 14056 | Elf_Internal_Shdr *symtab_hdr; |
| 14057 | bfd_size_type locsymcount; |
| 14058 | Elf_Internal_Sym *local_syms = NULL; |
| 14059 | struct plt_entry *ent; |
| 14060 | |
| 14061 | if (!is_ppc64_elf (ibfd)) |
| 14062 | continue; |
| 14063 | |
| 14064 | lgot_ents = elf_local_got_ents (ibfd); |
| 14065 | if (!lgot_ents) |
| 14066 | continue; |
| 14067 | |
| 14068 | symtab_hdr = &elf_symtab_hdr (ibfd); |
| 14069 | locsymcount = symtab_hdr->sh_info; |
| 14070 | end_lgot_ents = lgot_ents + locsymcount; |
| 14071 | local_plt = (struct plt_entry **) end_lgot_ents; |
| 14072 | end_local_plt = local_plt + locsymcount; |
| 14073 | for (lplt = local_plt; lplt < end_local_plt; ++lplt) |
| 14074 | for (ent = *lplt; ent != NULL; ent = ent->next) |
| 14075 | if (ent->plt.offset != (bfd_vma) -1) |
| 14076 | { |
| 14077 | Elf_Internal_Sym *sym; |
| 14078 | asection *sym_sec; |
| 14079 | asection *plt, *relplt; |
| 14080 | bfd_byte *loc; |
| 14081 | bfd_vma val; |
| 14082 | |
| 14083 | if (!get_sym_h (NULL, &sym, &sym_sec, NULL, &local_syms, |
| 14084 | lplt - local_plt, ibfd)) |
| 14085 | { |
| 14086 | if (symtab_hdr->contents != (unsigned char *) local_syms) |
| 14087 | free (local_syms); |
| 14088 | return FALSE; |
| 14089 | } |
| 14090 | |
| 14091 | val = sym->st_value + ent->addend; |
| 14092 | if (ELF_ST_TYPE (sym->st_info) != STT_GNU_IFUNC) |
| 14093 | val += PPC64_LOCAL_ENTRY_OFFSET (sym->st_other); |
| 14094 | if (sym_sec != NULL && sym_sec->output_section != NULL) |
| 14095 | val += sym_sec->output_offset + sym_sec->output_section->vma; |
| 14096 | |
| 14097 | if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
| 14098 | { |
| 14099 | htab->local_ifunc_resolver = 1; |
| 14100 | plt = htab->elf.iplt; |
| 14101 | relplt = htab->elf.irelplt; |
| 14102 | } |
| 14103 | else |
| 14104 | { |
| 14105 | plt = htab->pltlocal; |
| 14106 | relplt = bfd_link_pic (info) ? htab->relpltlocal : NULL; |
| 14107 | } |
| 14108 | |
| 14109 | if (relplt == NULL) |
| 14110 | { |
| 14111 | loc = plt->contents + ent->plt.offset; |
| 14112 | bfd_put_64 (info->output_bfd, val, loc); |
| 14113 | if (htab->opd_abi) |
| 14114 | { |
| 14115 | bfd_vma toc = elf_gp (ibfd); |
| 14116 | bfd_put_64 (info->output_bfd, toc, loc + 8); |
| 14117 | } |
| 14118 | } |
| 14119 | else |
| 14120 | { |
| 14121 | Elf_Internal_Rela rela; |
| 14122 | rela.r_offset = (ent->plt.offset |
| 14123 | + plt->output_offset |
| 14124 | + plt->output_section->vma); |
| 14125 | if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
| 14126 | { |
| 14127 | if (htab->opd_abi) |
| 14128 | rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL); |
| 14129 | else |
| 14130 | rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE); |
| 14131 | } |
| 14132 | else |
| 14133 | { |
| 14134 | if (htab->opd_abi) |
| 14135 | rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_SLOT); |
| 14136 | else |
| 14137 | rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); |
| 14138 | } |
| 14139 | rela.r_addend = val; |
| 14140 | loc = relplt->contents + (relplt->reloc_count++ |
| 14141 | * sizeof (Elf64_External_Rela)); |
| 14142 | bfd_elf64_swap_reloca_out (info->output_bfd, &rela, loc); |
| 14143 | } |
| 14144 | } |
| 14145 | |
| 14146 | if (local_syms != NULL |
| 14147 | && symtab_hdr->contents != (unsigned char *) local_syms) |
| 14148 | { |
| 14149 | if (!info->keep_memory) |
| 14150 | free (local_syms); |
| 14151 | else |
| 14152 | symtab_hdr->contents = (unsigned char *) local_syms; |
| 14153 | } |
| 14154 | } |
| 14155 | return TRUE; |
| 14156 | } |
| 14157 | |
| 14158 | /* Emit the static wrapper function preserving registers around a |
| 14159 | __tls_get_addr_opt call. */ |
| 14160 | |
| 14161 | static bfd_boolean |
| 14162 | emit_tga_desc (struct ppc_link_hash_table *htab) |
| 14163 | { |
| 14164 | asection *stub_sec = htab->tga_group->stub_sec; |
| 14165 | unsigned int cfa_updt = 11 * 4; |
| 14166 | bfd_byte *p; |
| 14167 | bfd_vma to, from, delta; |
| 14168 | |
| 14169 | BFD_ASSERT (htab->tga_desc_fd->elf.root.type == bfd_link_hash_defined |
| 14170 | && htab->tga_desc_fd->elf.root.u.def.section == stub_sec |
| 14171 | && htab->tga_desc_fd->elf.root.u.def.value == 0); |
| 14172 | to = defined_sym_val (&htab->tls_get_addr_fd->elf); |
| 14173 | from = defined_sym_val (&htab->tga_desc_fd->elf) + cfa_updt; |
| 14174 | delta = to - from; |
| 14175 | if (delta + (1 << 25) >= 1 << 26) |
| 14176 | { |
| 14177 | _bfd_error_handler (_("__tls_get_addr call offset overflow")); |
| 14178 | htab->stub_error = TRUE; |
| 14179 | return FALSE; |
| 14180 | } |
| 14181 | |
| 14182 | p = stub_sec->contents; |
| 14183 | p = tls_get_addr_prologue (htab->elf.dynobj, p, htab); |
| 14184 | bfd_put_32 (stub_sec->owner, B_DOT | 1 | (delta & 0x3fffffc), p); |
| 14185 | p += 4; |
| 14186 | p = tls_get_addr_epilogue (htab->elf.dynobj, p, htab); |
| 14187 | return stub_sec->size == (bfd_size_type) (p - stub_sec->contents); |
| 14188 | } |
| 14189 | |
| 14190 | /* Emit eh_frame describing the static wrapper function. */ |
| 14191 | |
| 14192 | static bfd_byte * |
| 14193 | emit_tga_desc_eh_frame (struct ppc_link_hash_table *htab, bfd_byte *p) |
| 14194 | { |
| 14195 | unsigned int cfa_updt = 11 * 4; |
| 14196 | unsigned int i; |
| 14197 | |
| 14198 | *p++ = DW_CFA_advance_loc + cfa_updt / 4; |
| 14199 | *p++ = DW_CFA_def_cfa_offset; |
| 14200 | if (htab->opd_abi) |
| 14201 | { |
| 14202 | *p++ = 128; |
| 14203 | *p++ = 1; |
| 14204 | } |
| 14205 | else |
| 14206 | *p++ = 96; |
| 14207 | *p++ = DW_CFA_offset_extended_sf; |
| 14208 | *p++ = 65; |
| 14209 | *p++ = (-16 / 8) & 0x7f; |
| 14210 | for (i = 4; i < 12; i++) |
| 14211 | { |
| 14212 | *p++ = DW_CFA_offset + i; |
| 14213 | *p++ = (htab->opd_abi ? 13 : 12) - i; |
| 14214 | } |
| 14215 | *p++ = DW_CFA_advance_loc + 10; |
| 14216 | *p++ = DW_CFA_def_cfa_offset; |
| 14217 | *p++ = 0; |
| 14218 | for (i = 4; i < 12; i++) |
| 14219 | *p++ = DW_CFA_restore + i; |
| 14220 | *p++ = DW_CFA_advance_loc + 2; |
| 14221 | *p++ = DW_CFA_restore_extended; |
| 14222 | *p++ = 65; |
| 14223 | return p; |
| 14224 | } |
| 14225 | |
| 14226 | /* Build all the stubs associated with the current output file. |
| 14227 | The stubs are kept in a hash table attached to the main linker |
| 14228 | hash table. This function is called via gldelf64ppc_finish. */ |
| 14229 | |
| 14230 | bfd_boolean |
| 14231 | ppc64_elf_build_stubs (struct bfd_link_info *info, |
| 14232 | char **stats) |
| 14233 | { |
| 14234 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
| 14235 | struct map_stub *group; |
| 14236 | asection *stub_sec; |
| 14237 | bfd_byte *p; |
| 14238 | int stub_sec_count = 0; |
| 14239 | |
| 14240 | if (htab == NULL) |
| 14241 | return FALSE; |
| 14242 | |
| 14243 | /* Allocate memory to hold the linker stubs. */ |
| 14244 | for (group = htab->group; group != NULL; group = group->next) |
| 14245 | { |
| 14246 | group->eh_size = 0; |
| 14247 | group->lr_restore = 0; |
| 14248 | if ((stub_sec = group->stub_sec) != NULL |
| 14249 | && stub_sec->size != 0) |
| 14250 | { |
| 14251 | stub_sec->contents = bfd_zalloc (htab->params->stub_bfd, |
| 14252 | stub_sec->size); |
| 14253 | if (stub_sec->contents == NULL) |
| 14254 | return FALSE; |
| 14255 | stub_sec->size = 0; |
| 14256 | } |
| 14257 | } |
| 14258 | |
| 14259 | if (htab->glink != NULL && htab->glink->size != 0) |
| 14260 | { |
| 14261 | unsigned int indx; |
| 14262 | bfd_vma plt0; |
| 14263 | |
| 14264 | /* Build the .glink plt call stub. */ |
| 14265 | if (htab->params->emit_stub_syms) |
| 14266 | { |
| 14267 | struct elf_link_hash_entry *h; |
| 14268 | h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve", |
| 14269 | TRUE, FALSE, FALSE); |
| 14270 | if (h == NULL) |
| 14271 | return FALSE; |
| 14272 | if (h->root.type == bfd_link_hash_new) |
| 14273 | { |
| 14274 | h->root.type = bfd_link_hash_defined; |
| 14275 | h->root.u.def.section = htab->glink; |
| 14276 | h->root.u.def.value = 8; |
| 14277 | h->ref_regular = 1; |
| 14278 | h->def_regular = 1; |
| 14279 | h->ref_regular_nonweak = 1; |
| 14280 | h->forced_local = 1; |
| 14281 | h->non_elf = 0; |
| 14282 | h->root.linker_def = 1; |
| 14283 | } |
| 14284 | } |
| 14285 | plt0 = (htab->elf.splt->output_section->vma |
| 14286 | + htab->elf.splt->output_offset |
| 14287 | - 16); |
| 14288 | if (info->emitrelocations) |
| 14289 | { |
| 14290 | Elf_Internal_Rela *r = get_relocs (htab->glink, 1); |
| 14291 | if (r == NULL) |
| 14292 | return FALSE; |
| 14293 | r->r_offset = (htab->glink->output_offset |
| 14294 | + htab->glink->output_section->vma); |
| 14295 | r->r_info = ELF64_R_INFO (0, R_PPC64_REL64); |
| 14296 | r->r_addend = plt0; |
| 14297 | } |
| 14298 | p = htab->glink->contents; |
| 14299 | plt0 -= htab->glink->output_section->vma + htab->glink->output_offset; |
| 14300 | bfd_put_64 (htab->glink->owner, plt0, p); |
| 14301 | p += 8; |
| 14302 | if (htab->opd_abi) |
| 14303 | { |
| 14304 | bfd_put_32 (htab->glink->owner, MFLR_R12, p); |
| 14305 | p += 4; |
| 14306 | bfd_put_32 (htab->glink->owner, BCL_20_31, p); |
| 14307 | p += 4; |
| 14308 | bfd_put_32 (htab->glink->owner, MFLR_R11, p); |
| 14309 | p += 4; |
| 14310 | bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p); |
| 14311 | p += 4; |
| 14312 | bfd_put_32 (htab->glink->owner, MTLR_R12, p); |
| 14313 | p += 4; |
| 14314 | bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p); |
| 14315 | p += 4; |
| 14316 | bfd_put_32 (htab->glink->owner, LD_R12_0R11, p); |
| 14317 | p += 4; |
| 14318 | bfd_put_32 (htab->glink->owner, LD_R2_0R11 | 8, p); |
| 14319 | p += 4; |
| 14320 | bfd_put_32 (htab->glink->owner, MTCTR_R12, p); |
| 14321 | p += 4; |
| 14322 | bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 16, p); |
| 14323 | p += 4; |
| 14324 | } |
| 14325 | else |
| 14326 | { |
| 14327 | bfd_put_32 (htab->glink->owner, MFLR_R0, p); |
| 14328 | p += 4; |
| 14329 | bfd_put_32 (htab->glink->owner, BCL_20_31, p); |
| 14330 | p += 4; |
| 14331 | bfd_put_32 (htab->glink->owner, MFLR_R11, p); |
| 14332 | p += 4; |
| 14333 | bfd_put_32 (htab->glink->owner, STD_R2_0R1 + 24, p); |
| 14334 | p += 4; |
| 14335 | bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p); |
| 14336 | p += 4; |
| 14337 | bfd_put_32 (htab->glink->owner, MTLR_R0, p); |
| 14338 | p += 4; |
| 14339 | bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p); |
| 14340 | p += 4; |
| 14341 | bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p); |
| 14342 | p += 4; |
| 14343 | bfd_put_32 (htab->glink->owner, ADDI_R0_R12 | (-48 & 0xffff), p); |
| 14344 | p += 4; |
| 14345 | bfd_put_32 (htab->glink->owner, LD_R12_0R11, p); |
| 14346 | p += 4; |
| 14347 | bfd_put_32 (htab->glink->owner, SRDI_R0_R0_2, p); |
| 14348 | p += 4; |
| 14349 | bfd_put_32 (htab->glink->owner, MTCTR_R12, p); |
| 14350 | p += 4; |
| 14351 | bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 8, p); |
| 14352 | p += 4; |
| 14353 | } |
| 14354 | bfd_put_32 (htab->glink->owner, BCTR, p); |
| 14355 | p += 4; |
| 14356 | BFD_ASSERT (p == htab->glink->contents + GLINK_PLTRESOLVE_SIZE (htab)); |
| 14357 | |
| 14358 | /* Build the .glink lazy link call stubs. */ |
| 14359 | indx = 0; |
| 14360 | while (p < htab->glink->contents + htab->glink->size) |
| 14361 | { |
| 14362 | if (htab->opd_abi) |
| 14363 | { |
| 14364 | if (indx < 0x8000) |
| 14365 | { |
| 14366 | bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p); |
| 14367 | p += 4; |
| 14368 | } |
| 14369 | else |
| 14370 | { |
| 14371 | bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p); |
| 14372 | p += 4; |
| 14373 | bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), |
| 14374 | p); |
| 14375 | p += 4; |
| 14376 | } |
| 14377 | } |
| 14378 | bfd_put_32 (htab->glink->owner, |
| 14379 | B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p); |
| 14380 | indx++; |
| 14381 | p += 4; |
| 14382 | } |
| 14383 | } |
| 14384 | |
| 14385 | if (htab->tga_group != NULL) |
| 14386 | { |
| 14387 | htab->tga_group->lr_restore = 23 * 4; |
| 14388 | htab->tga_group->stub_sec->size = 24 * 4; |
| 14389 | if (!emit_tga_desc (htab)) |
| 14390 | return FALSE; |
| 14391 | if (htab->glink_eh_frame != NULL |
| 14392 | && htab->glink_eh_frame->size != 0) |
| 14393 | { |
| 14394 | size_t align = 4; |
| 14395 | |
| 14396 | p = htab->glink_eh_frame->contents; |
| 14397 | p += (sizeof (glink_eh_frame_cie) + align - 1) & -align; |
| 14398 | p += 17; |
| 14399 | htab->tga_group->eh_size = emit_tga_desc_eh_frame (htab, p) - p; |
| 14400 | } |
| 14401 | } |
| 14402 | |
| 14403 | /* Build .glink global entry stubs, and PLT relocs for globals. */ |
| 14404 | elf_link_hash_traverse (&htab->elf, build_global_entry_stubs_and_plt, info); |
| 14405 | |
| 14406 | if (!write_plt_relocs_for_local_syms (info)) |
| 14407 | return FALSE; |
| 14408 | |
| 14409 | if (htab->brlt != NULL && htab->brlt->size != 0) |
| 14410 | { |
| 14411 | htab->brlt->contents = bfd_zalloc (htab->brlt->owner, |
| 14412 | htab->brlt->size); |
| 14413 | if (htab->brlt->contents == NULL) |
| 14414 | return FALSE; |
| 14415 | } |
| 14416 | if (htab->relbrlt != NULL && htab->relbrlt->size != 0) |
| 14417 | { |
| 14418 | htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner, |
| 14419 | htab->relbrlt->size); |
| 14420 | if (htab->relbrlt->contents == NULL) |
| 14421 | return FALSE; |
| 14422 | } |
| 14423 | |
| 14424 | /* Build the stubs as directed by the stub hash table. */ |
| 14425 | bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info); |
| 14426 | |
| 14427 | for (group = htab->group; group != NULL; group = group->next) |
| 14428 | if (group->needs_save_res) |
| 14429 | group->stub_sec->size += htab->sfpr->size; |
| 14430 | |
| 14431 | if (htab->relbrlt != NULL) |
| 14432 | htab->relbrlt->reloc_count = 0; |
| 14433 | |
| 14434 | if (htab->params->plt_stub_align != 0) |
| 14435 | for (group = htab->group; group != NULL; group = group->next) |
| 14436 | if ((stub_sec = group->stub_sec) != NULL) |
| 14437 | { |
| 14438 | int align = abs (htab->params->plt_stub_align); |
| 14439 | stub_sec->size = (stub_sec->size + (1 << align) - 1) & -(1 << align); |
| 14440 | } |
| 14441 | |
| 14442 | for (group = htab->group; group != NULL; group = group->next) |
| 14443 | if (group->needs_save_res) |
| 14444 | { |
| 14445 | stub_sec = group->stub_sec; |
| 14446 | memcpy (stub_sec->contents + stub_sec->size - htab->sfpr->size, |
| 14447 | htab->sfpr->contents, htab->sfpr->size); |
| 14448 | if (htab->params->emit_stub_syms) |
| 14449 | { |
| 14450 | unsigned int i; |
| 14451 | |
| 14452 | for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++) |
| 14453 | if (!sfpr_define (info, &save_res_funcs[i], stub_sec)) |
| 14454 | return FALSE; |
| 14455 | } |
| 14456 | } |
| 14457 | |
| 14458 | if (htab->glink_eh_frame != NULL |
| 14459 | && htab->glink_eh_frame->size != 0) |
| 14460 | { |
| 14461 | bfd_vma val; |
| 14462 | size_t align = 4; |
| 14463 | |
| 14464 | p = htab->glink_eh_frame->contents; |
| 14465 | p += (sizeof (glink_eh_frame_cie) + align - 1) & -align; |
| 14466 | |
| 14467 | for (group = htab->group; group != NULL; group = group->next) |
| 14468 | if (group->eh_size != 0) |
| 14469 | { |
| 14470 | /* Offset to stub section. */ |
| 14471 | val = (group->stub_sec->output_section->vma |
| 14472 | + group->stub_sec->output_offset); |
| 14473 | val -= (htab->glink_eh_frame->output_section->vma |
| 14474 | + htab->glink_eh_frame->output_offset |
| 14475 | + (p + 8 - htab->glink_eh_frame->contents)); |
| 14476 | if (val + 0x80000000 > 0xffffffff) |
| 14477 | { |
| 14478 | _bfd_error_handler |
| 14479 | (_("%s offset too large for .eh_frame sdata4 encoding"), |
| 14480 | group->stub_sec->name); |
| 14481 | return FALSE; |
| 14482 | } |
| 14483 | bfd_put_32 (htab->elf.dynobj, val, p + 8); |
| 14484 | p += (group->eh_size + 17 + 3) & -4; |
| 14485 | } |
| 14486 | if (htab->glink != NULL && htab->glink->size != 0) |
| 14487 | { |
| 14488 | /* Offset to .glink. */ |
| 14489 | val = (htab->glink->output_section->vma |
| 14490 | + htab->glink->output_offset |
| 14491 | + 8); |
| 14492 | val -= (htab->glink_eh_frame->output_section->vma |
| 14493 | + htab->glink_eh_frame->output_offset |
| 14494 | + (p + 8 - htab->glink_eh_frame->contents)); |
| 14495 | if (val + 0x80000000 > 0xffffffff) |
| 14496 | { |
| 14497 | _bfd_error_handler |
| 14498 | (_("%s offset too large for .eh_frame sdata4 encoding"), |
| 14499 | htab->glink->name); |
| 14500 | return FALSE; |
| 14501 | } |
| 14502 | bfd_put_32 (htab->elf.dynobj, val, p + 8); |
| 14503 | p += (24 + align - 1) & -align; |
| 14504 | } |
| 14505 | } |
| 14506 | |
| 14507 | for (group = htab->group; group != NULL; group = group->next) |
| 14508 | if ((stub_sec = group->stub_sec) != NULL) |
| 14509 | { |
| 14510 | stub_sec_count += 1; |
| 14511 | if (stub_sec->rawsize != stub_sec->size |
| 14512 | && (htab->stub_iteration <= STUB_SHRINK_ITER |
| 14513 | || stub_sec->rawsize < stub_sec->size)) |
| 14514 | break; |
| 14515 | } |
| 14516 | |
| 14517 | if (group != NULL) |
| 14518 | { |
| 14519 | htab->stub_error = TRUE; |
| 14520 | _bfd_error_handler (_("stubs don't match calculated size")); |
| 14521 | } |
| 14522 | |
| 14523 | if (htab->stub_error) |
| 14524 | return FALSE; |
| 14525 | |
| 14526 | if (stats != NULL) |
| 14527 | { |
| 14528 | char *groupmsg; |
| 14529 | if (asprintf (&groupmsg, |
| 14530 | ngettext ("linker stubs in %u group\n", |
| 14531 | "linker stubs in %u groups\n", |
| 14532 | stub_sec_count), |
| 14533 | stub_sec_count) < 0) |
| 14534 | *stats = NULL; |
| 14535 | else |
| 14536 | { |
| 14537 | if (asprintf (stats, _("%s" |
| 14538 | " branch %lu\n" |
| 14539 | " branch toc adj %lu\n" |
| 14540 | " branch notoc %lu\n" |
| 14541 | " branch both %lu\n" |
| 14542 | " long branch %lu\n" |
| 14543 | " long toc adj %lu\n" |
| 14544 | " long notoc %lu\n" |
| 14545 | " long both %lu\n" |
| 14546 | " plt call %lu\n" |
| 14547 | " plt call save %lu\n" |
| 14548 | " plt call notoc %lu\n" |
| 14549 | " plt call both %lu\n" |
| 14550 | " global entry %lu"), |
| 14551 | groupmsg, |
| 14552 | htab->stub_count[ppc_stub_long_branch - 1], |
| 14553 | htab->stub_count[ppc_stub_long_branch_r2off - 1], |
| 14554 | htab->stub_count[ppc_stub_long_branch_notoc - 1], |
| 14555 | htab->stub_count[ppc_stub_long_branch_both - 1], |
| 14556 | htab->stub_count[ppc_stub_plt_branch - 1], |
| 14557 | htab->stub_count[ppc_stub_plt_branch_r2off - 1], |
| 14558 | htab->stub_count[ppc_stub_plt_branch_notoc - 1], |
| 14559 | htab->stub_count[ppc_stub_plt_branch_both - 1], |
| 14560 | htab->stub_count[ppc_stub_plt_call - 1], |
| 14561 | htab->stub_count[ppc_stub_plt_call_r2save - 1], |
| 14562 | htab->stub_count[ppc_stub_plt_call_notoc - 1], |
| 14563 | htab->stub_count[ppc_stub_plt_call_both - 1], |
| 14564 | htab->stub_count[ppc_stub_global_entry - 1]) < 0) |
| 14565 | *stats = NULL; |
| 14566 | free (groupmsg); |
| 14567 | } |
| 14568 | } |
| 14569 | return TRUE; |
| 14570 | } |
| 14571 | |
| 14572 | /* What to do when ld finds relocations against symbols defined in |
| 14573 | discarded sections. */ |
| 14574 | |
| 14575 | static unsigned int |
| 14576 | ppc64_elf_action_discarded (asection *sec) |
| 14577 | { |
| 14578 | if (strcmp (".opd", sec->name) == 0) |
| 14579 | return 0; |
| 14580 | |
| 14581 | if (strcmp (".toc", sec->name) == 0) |
| 14582 | return 0; |
| 14583 | |
| 14584 | if (strcmp (".toc1", sec->name) == 0) |
| 14585 | return 0; |
| 14586 | |
| 14587 | return _bfd_elf_default_action_discarded (sec); |
| 14588 | } |
| 14589 | |
| 14590 | /* These are the dynamic relocations supported by glibc. */ |
| 14591 | |
| 14592 | static bfd_boolean |
| 14593 | ppc64_glibc_dynamic_reloc (enum elf_ppc64_reloc_type r_type) |
| 14594 | { |
| 14595 | switch (r_type) |
| 14596 | { |
| 14597 | case R_PPC64_RELATIVE: |
| 14598 | case R_PPC64_NONE: |
| 14599 | case R_PPC64_ADDR64: |
| 14600 | case R_PPC64_GLOB_DAT: |
| 14601 | case R_PPC64_IRELATIVE: |
| 14602 | case R_PPC64_JMP_IREL: |
| 14603 | case R_PPC64_JMP_SLOT: |
| 14604 | case R_PPC64_DTPMOD64: |
| 14605 | case R_PPC64_DTPREL64: |
| 14606 | case R_PPC64_TPREL64: |
| 14607 | case R_PPC64_TPREL16_LO_DS: |
| 14608 | case R_PPC64_TPREL16_DS: |
| 14609 | case R_PPC64_TPREL16: |
| 14610 | case R_PPC64_TPREL16_LO: |
| 14611 | case R_PPC64_TPREL16_HI: |
| 14612 | case R_PPC64_TPREL16_HIGH: |
| 14613 | case R_PPC64_TPREL16_HA: |
| 14614 | case R_PPC64_TPREL16_HIGHA: |
| 14615 | case R_PPC64_TPREL16_HIGHER: |
| 14616 | case R_PPC64_TPREL16_HIGHEST: |
| 14617 | case R_PPC64_TPREL16_HIGHERA: |
| 14618 | case R_PPC64_TPREL16_HIGHESTA: |
| 14619 | case R_PPC64_ADDR16_LO_DS: |
| 14620 | case R_PPC64_ADDR16_LO: |
| 14621 | case R_PPC64_ADDR16_HI: |
| 14622 | case R_PPC64_ADDR16_HIGH: |
| 14623 | case R_PPC64_ADDR16_HA: |
| 14624 | case R_PPC64_ADDR16_HIGHA: |
| 14625 | case R_PPC64_REL30: |
| 14626 | case R_PPC64_COPY: |
| 14627 | case R_PPC64_UADDR64: |
| 14628 | case R_PPC64_UADDR32: |
| 14629 | case R_PPC64_ADDR32: |
| 14630 | case R_PPC64_ADDR24: |
| 14631 | case R_PPC64_ADDR16: |
| 14632 | case R_PPC64_UADDR16: |
| 14633 | case R_PPC64_ADDR16_DS: |
| 14634 | case R_PPC64_ADDR16_HIGHER: |
| 14635 | case R_PPC64_ADDR16_HIGHEST: |
| 14636 | case R_PPC64_ADDR16_HIGHERA: |
| 14637 | case R_PPC64_ADDR16_HIGHESTA: |
| 14638 | case R_PPC64_ADDR14: |
| 14639 | case R_PPC64_ADDR14_BRTAKEN: |
| 14640 | case R_PPC64_ADDR14_BRNTAKEN: |
| 14641 | case R_PPC64_REL32: |
| 14642 | case R_PPC64_REL64: |
| 14643 | return TRUE; |
| 14644 | |
| 14645 | default: |
| 14646 | return FALSE; |
| 14647 | } |
| 14648 | } |
| 14649 | |
| 14650 | /* The RELOCATE_SECTION function is called by the ELF backend linker |
| 14651 | to handle the relocations for a section. |
| 14652 | |
| 14653 | The relocs are always passed as Rela structures; if the section |
| 14654 | actually uses Rel structures, the r_addend field will always be |
| 14655 | zero. |
| 14656 | |
| 14657 | This function is responsible for adjust the section contents as |
| 14658 | necessary, and (if using Rela relocs and generating a |
| 14659 | relocatable output file) adjusting the reloc addend as |
| 14660 | necessary. |
| 14661 | |
| 14662 | This function does not have to worry about setting the reloc |
| 14663 | address or the reloc symbol index. |
| 14664 | |
| 14665 | LOCAL_SYMS is a pointer to the swapped in local symbols. |
| 14666 | |
| 14667 | LOCAL_SECTIONS is an array giving the section in the input file |
| 14668 | corresponding to the st_shndx field of each local symbol. |
| 14669 | |
| 14670 | The global hash table entry for the global symbols can be found |
| 14671 | via elf_sym_hashes (input_bfd). |
| 14672 | |
| 14673 | When generating relocatable output, this function must handle |
| 14674 | STB_LOCAL/STT_SECTION symbols specially. The output symbol is |
| 14675 | going to be the section symbol corresponding to the output |
| 14676 | section, which means that the addend must be adjusted |
| 14677 | accordingly. */ |
| 14678 | |
| 14679 | static bfd_boolean |
| 14680 | ppc64_elf_relocate_section (bfd *output_bfd, |
| 14681 | struct bfd_link_info *info, |
| 14682 | bfd *input_bfd, |
| 14683 | asection *input_section, |
| 14684 | bfd_byte *contents, |
| 14685 | Elf_Internal_Rela *relocs, |
| 14686 | Elf_Internal_Sym *local_syms, |
| 14687 | asection **local_sections) |
| 14688 | { |
| 14689 | struct ppc_link_hash_table *htab; |
| 14690 | Elf_Internal_Shdr *symtab_hdr; |
| 14691 | struct elf_link_hash_entry **sym_hashes; |
| 14692 | Elf_Internal_Rela *rel; |
| 14693 | Elf_Internal_Rela *wrel; |
| 14694 | Elf_Internal_Rela *relend; |
| 14695 | Elf_Internal_Rela outrel; |
| 14696 | bfd_byte *loc; |
| 14697 | struct got_entry **local_got_ents; |
| 14698 | bfd_vma TOCstart; |
| 14699 | bfd_boolean ret = TRUE; |
| 14700 | bfd_boolean is_opd; |
| 14701 | /* Assume 'at' branch hints. */ |
| 14702 | bfd_boolean is_isa_v2 = TRUE; |
| 14703 | bfd_boolean warned_dynamic = FALSE; |
| 14704 | bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0); |
| 14705 | |
| 14706 | /* Initialize howto table if needed. */ |
| 14707 | if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) |
| 14708 | ppc_howto_init (); |
| 14709 | |
| 14710 | htab = ppc_hash_table (info); |
| 14711 | if (htab == NULL) |
| 14712 | return FALSE; |
| 14713 | |
| 14714 | /* Don't relocate stub sections. */ |
| 14715 | if (input_section->owner == htab->params->stub_bfd) |
| 14716 | return TRUE; |
| 14717 | |
| 14718 | if (!is_ppc64_elf (input_bfd)) |
| 14719 | { |
| 14720 | bfd_set_error (bfd_error_wrong_format); |
| 14721 | return FALSE; |
| 14722 | } |
| 14723 | |
| 14724 | local_got_ents = elf_local_got_ents (input_bfd); |
| 14725 | TOCstart = elf_gp (output_bfd); |
| 14726 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
| 14727 | sym_hashes = elf_sym_hashes (input_bfd); |
| 14728 | is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd; |
| 14729 | |
| 14730 | rel = wrel = relocs; |
| 14731 | relend = relocs + input_section->reloc_count; |
| 14732 | for (; rel < relend; wrel++, rel++) |
| 14733 | { |
| 14734 | enum elf_ppc64_reloc_type r_type; |
| 14735 | bfd_vma addend; |
| 14736 | bfd_reloc_status_type r; |
| 14737 | Elf_Internal_Sym *sym; |
| 14738 | asection *sec; |
| 14739 | struct elf_link_hash_entry *h_elf; |
| 14740 | struct ppc_link_hash_entry *h; |
| 14741 | struct ppc_link_hash_entry *fdh; |
| 14742 | const char *sym_name; |
| 14743 | unsigned long r_symndx, toc_symndx; |
| 14744 | bfd_vma toc_addend; |
| 14745 | unsigned char tls_mask, tls_gd, tls_type; |
| 14746 | unsigned char sym_type; |
| 14747 | bfd_vma relocation; |
| 14748 | bfd_boolean unresolved_reloc, save_unresolved_reloc; |
| 14749 | bfd_boolean warned; |
| 14750 | enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest; |
| 14751 | unsigned int insn; |
| 14752 | unsigned int mask; |
| 14753 | struct ppc_stub_hash_entry *stub_entry; |
| 14754 | bfd_vma max_br_offset; |
| 14755 | bfd_vma from; |
| 14756 | Elf_Internal_Rela orig_rel; |
| 14757 | reloc_howto_type *howto; |
| 14758 | struct reloc_howto_struct alt_howto; |
| 14759 | uint64_t pinsn; |
| 14760 | bfd_vma offset; |
| 14761 | |
| 14762 | again: |
| 14763 | orig_rel = *rel; |
| 14764 | |
| 14765 | r_type = ELF64_R_TYPE (rel->r_info); |
| 14766 | r_symndx = ELF64_R_SYM (rel->r_info); |
| 14767 | |
| 14768 | /* For old style R_PPC64_TOC relocs with a zero symbol, use the |
| 14769 | symbol of the previous ADDR64 reloc. The symbol gives us the |
| 14770 | proper TOC base to use. */ |
| 14771 | if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC) |
| 14772 | && wrel != relocs |
| 14773 | && ELF64_R_TYPE (wrel[-1].r_info) == R_PPC64_ADDR64 |
| 14774 | && is_opd) |
| 14775 | r_symndx = ELF64_R_SYM (wrel[-1].r_info); |
| 14776 | |
| 14777 | sym = NULL; |
| 14778 | sec = NULL; |
| 14779 | h_elf = NULL; |
| 14780 | sym_name = NULL; |
| 14781 | unresolved_reloc = FALSE; |
| 14782 | warned = FALSE; |
| 14783 | |
| 14784 | if (r_symndx < symtab_hdr->sh_info) |
| 14785 | { |
| 14786 | /* It's a local symbol. */ |
| 14787 | struct _opd_sec_data *opd; |
| 14788 | |
| 14789 | sym = local_syms + r_symndx; |
| 14790 | sec = local_sections[r_symndx]; |
| 14791 | sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec); |
| 14792 | sym_type = ELF64_ST_TYPE (sym->st_info); |
| 14793 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
| 14794 | opd = get_opd_info (sec); |
| 14795 | if (opd != NULL && opd->adjust != NULL) |
| 14796 | { |
| 14797 | long adjust = opd->adjust[OPD_NDX (sym->st_value |
| 14798 | + rel->r_addend)]; |
| 14799 | if (adjust == -1) |
| 14800 | relocation = 0; |
| 14801 | else |
| 14802 | { |
| 14803 | /* If this is a relocation against the opd section sym |
| 14804 | and we have edited .opd, adjust the reloc addend so |
| 14805 | that ld -r and ld --emit-relocs output is correct. |
| 14806 | If it is a reloc against some other .opd symbol, |
| 14807 | then the symbol value will be adjusted later. */ |
| 14808 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) |
| 14809 | rel->r_addend += adjust; |
| 14810 | else |
| 14811 | relocation += adjust; |
| 14812 | } |
| 14813 | } |
| 14814 | } |
| 14815 | else |
| 14816 | { |
| 14817 | bfd_boolean ignored; |
| 14818 | |
| 14819 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
| 14820 | r_symndx, symtab_hdr, sym_hashes, |
| 14821 | h_elf, sec, relocation, |
| 14822 | unresolved_reloc, warned, ignored); |
| 14823 | sym_name = h_elf->root.root.string; |
| 14824 | sym_type = h_elf->type; |
| 14825 | if (sec != NULL |
| 14826 | && sec->owner == output_bfd |
| 14827 | && strcmp (sec->name, ".opd") == 0) |
| 14828 | { |
| 14829 | /* This is a symbol defined in a linker script. All |
| 14830 | such are defined in output sections, even those |
| 14831 | defined by simple assignment from a symbol defined in |
| 14832 | an input section. Transfer the symbol to an |
| 14833 | appropriate input .opd section, so that a branch to |
| 14834 | this symbol will be mapped to the location specified |
| 14835 | by the opd entry. */ |
| 14836 | struct bfd_link_order *lo; |
| 14837 | for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next) |
| 14838 | if (lo->type == bfd_indirect_link_order) |
| 14839 | { |
| 14840 | asection *isec = lo->u.indirect.section; |
| 14841 | if (h_elf->root.u.def.value >= isec->output_offset |
| 14842 | && h_elf->root.u.def.value < (isec->output_offset |
| 14843 | + isec->size)) |
| 14844 | { |
| 14845 | h_elf->root.u.def.value -= isec->output_offset; |
| 14846 | h_elf->root.u.def.section = isec; |
| 14847 | sec = isec; |
| 14848 | break; |
| 14849 | } |
| 14850 | } |
| 14851 | } |
| 14852 | } |
| 14853 | h = ppc_elf_hash_entry (h_elf); |
| 14854 | |
| 14855 | if (sec != NULL && discarded_section (sec)) |
| 14856 | { |
| 14857 | _bfd_clear_contents (ppc64_elf_howto_table[r_type], |
| 14858 | input_bfd, input_section, |
| 14859 | contents, rel->r_offset); |
| 14860 | wrel->r_offset = rel->r_offset; |
| 14861 | wrel->r_info = 0; |
| 14862 | wrel->r_addend = 0; |
| 14863 | |
| 14864 | /* For ld -r, remove relocations in debug sections against |
| 14865 | symbols defined in discarded sections. Not done for |
| 14866 | non-debug to preserve relocs in .eh_frame which the |
| 14867 | eh_frame editing code expects to be present. */ |
| 14868 | if (bfd_link_relocatable (info) |
| 14869 | && (input_section->flags & SEC_DEBUGGING)) |
| 14870 | wrel--; |
| 14871 | |
| 14872 | continue; |
| 14873 | } |
| 14874 | |
| 14875 | if (bfd_link_relocatable (info)) |
| 14876 | goto copy_reloc; |
| 14877 | |
| 14878 | if (h != NULL && &h->elf == htab->elf.hgot) |
| 14879 | { |
| 14880 | relocation = TOCstart + htab->sec_info[input_section->id].toc_off; |
| 14881 | sec = bfd_abs_section_ptr; |
| 14882 | unresolved_reloc = FALSE; |
| 14883 | } |
| 14884 | |
| 14885 | /* TLS optimizations. Replace instruction sequences and relocs |
| 14886 | based on information we collected in tls_optimize. We edit |
| 14887 | RELOCS so that --emit-relocs will output something sensible |
| 14888 | for the final instruction stream. */ |
| 14889 | tls_mask = 0; |
| 14890 | tls_gd = 0; |
| 14891 | toc_symndx = 0; |
| 14892 | if (h != NULL) |
| 14893 | tls_mask = h->tls_mask; |
| 14894 | else if (local_got_ents != NULL) |
| 14895 | { |
| 14896 | struct plt_entry **local_plt = (struct plt_entry **) |
| 14897 | (local_got_ents + symtab_hdr->sh_info); |
| 14898 | unsigned char *lgot_masks = (unsigned char *) |
| 14899 | (local_plt + symtab_hdr->sh_info); |
| 14900 | tls_mask = lgot_masks[r_symndx]; |
| 14901 | } |
| 14902 | if (((tls_mask & TLS_TLS) == 0 || tls_mask == (TLS_TLS | TLS_MARK)) |
| 14903 | && (r_type == R_PPC64_TLS |
| 14904 | || r_type == R_PPC64_TLSGD |
| 14905 | || r_type == R_PPC64_TLSLD)) |
| 14906 | { |
| 14907 | /* Check for toc tls entries. */ |
| 14908 | unsigned char *toc_tls; |
| 14909 | |
| 14910 | if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend, |
| 14911 | &local_syms, rel, input_bfd)) |
| 14912 | return FALSE; |
| 14913 | |
| 14914 | if (toc_tls) |
| 14915 | tls_mask = *toc_tls; |
| 14916 | } |
| 14917 | |
| 14918 | /* Check that tls relocs are used with tls syms, and non-tls |
| 14919 | relocs are used with non-tls syms. */ |
| 14920 | if (r_symndx != STN_UNDEF |
| 14921 | && r_type != R_PPC64_NONE |
| 14922 | && (h == NULL |
| 14923 | || h->elf.root.type == bfd_link_hash_defined |
| 14924 | || h->elf.root.type == bfd_link_hash_defweak) |
| 14925 | && IS_PPC64_TLS_RELOC (r_type) != (sym_type == STT_TLS)) |
| 14926 | { |
| 14927 | if ((tls_mask & TLS_TLS) != 0 |
| 14928 | && (r_type == R_PPC64_TLS |
| 14929 | || r_type == R_PPC64_TLSGD |
| 14930 | || r_type == R_PPC64_TLSLD)) |
| 14931 | /* R_PPC64_TLS is OK against a symbol in the TOC. */ |
| 14932 | ; |
| 14933 | else |
| 14934 | info->callbacks->einfo |
| 14935 | (!IS_PPC64_TLS_RELOC (r_type) |
| 14936 | /* xgettext:c-format */ |
| 14937 | ? _("%H: %s used with TLS symbol `%pT'\n") |
| 14938 | /* xgettext:c-format */ |
| 14939 | : _("%H: %s used with non-TLS symbol `%pT'\n"), |
| 14940 | input_bfd, input_section, rel->r_offset, |
| 14941 | ppc64_elf_howto_table[r_type]->name, |
| 14942 | sym_name); |
| 14943 | } |
| 14944 | |
| 14945 | /* Ensure reloc mapping code below stays sane. */ |
| 14946 | if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1 |
| 14947 | || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1 |
| 14948 | || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3) |
| 14949 | || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3) |
| 14950 | || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3) |
| 14951 | || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3) |
| 14952 | || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3) |
| 14953 | || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3) |
| 14954 | || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3) |
| 14955 | || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3)) |
| 14956 | abort (); |
| 14957 | |
| 14958 | switch (r_type) |
| 14959 | { |
| 14960 | default: |
| 14961 | break; |
| 14962 | |
| 14963 | case R_PPC64_LO_DS_OPT: |
| 14964 | insn = bfd_get_32 (input_bfd, contents + rel->r_offset - d_offset); |
| 14965 | if ((insn & (0x3fu << 26)) != 58u << 26) |
| 14966 | abort (); |
| 14967 | insn += (14u << 26) - (58u << 26); |
| 14968 | bfd_put_32 (input_bfd, insn, contents + rel->r_offset - d_offset); |
| 14969 | r_type = R_PPC64_TOC16_LO; |
| 14970 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
| 14971 | break; |
| 14972 | |
| 14973 | case R_PPC64_TOC16: |
| 14974 | case R_PPC64_TOC16_LO: |
| 14975 | case R_PPC64_TOC16_DS: |
| 14976 | case R_PPC64_TOC16_LO_DS: |
| 14977 | { |
| 14978 | /* Check for toc tls entries. */ |
| 14979 | unsigned char *toc_tls; |
| 14980 | int retval; |
| 14981 | |
| 14982 | retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend, |
| 14983 | &local_syms, rel, input_bfd); |
| 14984 | if (retval == 0) |
| 14985 | return FALSE; |
| 14986 | |
| 14987 | if (toc_tls) |
| 14988 | { |
| 14989 | tls_mask = *toc_tls; |
| 14990 | if (r_type == R_PPC64_TOC16_DS |
| 14991 | || r_type == R_PPC64_TOC16_LO_DS) |
| 14992 | { |
| 14993 | if ((tls_mask & TLS_TLS) != 0 |
| 14994 | && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0) |
| 14995 | goto toctprel; |
| 14996 | } |
| 14997 | else |
| 14998 | { |
| 14999 | /* If we found a GD reloc pair, then we might be |
| 15000 | doing a GD->IE transition. */ |
| 15001 | if (retval == 2) |
| 15002 | { |
| 15003 | tls_gd = TLS_GDIE; |
| 15004 | if ((tls_mask & TLS_TLS) != 0 |
| 15005 | && (tls_mask & TLS_GD) == 0) |
| 15006 | goto tls_ldgd_opt; |
| 15007 | } |
| 15008 | else if (retval == 3) |
| 15009 | { |
| 15010 | if ((tls_mask & TLS_TLS) != 0 |
| 15011 | && (tls_mask & TLS_LD) == 0) |
| 15012 | goto tls_ldgd_opt; |
| 15013 | } |
| 15014 | } |
| 15015 | } |
| 15016 | } |
| 15017 | break; |
| 15018 | |
| 15019 | case R_PPC64_GOT_TPREL16_HI: |
| 15020 | case R_PPC64_GOT_TPREL16_HA: |
| 15021 | if ((tls_mask & TLS_TLS) != 0 |
| 15022 | && (tls_mask & TLS_TPREL) == 0) |
| 15023 | { |
| 15024 | rel->r_offset -= d_offset; |
| 15025 | bfd_put_32 (input_bfd, NOP, contents + rel->r_offset); |
| 15026 | r_type = R_PPC64_NONE; |
| 15027 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
| 15028 | } |
| 15029 | break; |
| 15030 | |
| 15031 | case R_PPC64_GOT_TPREL16_DS: |
| 15032 | case R_PPC64_GOT_TPREL16_LO_DS: |
| 15033 | if ((tls_mask & TLS_TLS) != 0 |
| 15034 | && (tls_mask & TLS_TPREL) == 0) |
| 15035 | { |
| 15036 | toctprel: |
| 15037 | insn = bfd_get_32 (input_bfd, |
| 15038 | contents + rel->r_offset - d_offset); |
| 15039 | insn &= 31 << 21; |
| 15040 | insn |= 0x3c0d0000; /* addis 0,13,0 */ |
| 15041 | bfd_put_32 (input_bfd, insn, |
| 15042 | contents + rel->r_offset - d_offset); |
| 15043 | r_type = R_PPC64_TPREL16_HA; |
| 15044 | if (toc_symndx != 0) |
| 15045 | { |
| 15046 | rel->r_info = ELF64_R_INFO (toc_symndx, r_type); |
| 15047 | rel->r_addend = toc_addend; |
| 15048 | /* We changed the symbol. Start over in order to |
| 15049 | get h, sym, sec etc. right. */ |
| 15050 | goto again; |
| 15051 | } |
| 15052 | else |
| 15053 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
| 15054 | } |
| 15055 | break; |
| 15056 | |
| 15057 | case R_PPC64_GOT_TPREL34: |
| 15058 | if ((tls_mask & TLS_TLS) != 0 |
| 15059 | && (tls_mask & TLS_TPREL) == 0) |
| 15060 | { |
| 15061 | /* pld ra,sym@got@tprel@pcrel -> paddi ra,r13,sym@tprel */ |
| 15062 | pinsn = bfd_get_32 (input_bfd, contents + rel->r_offset); |
| 15063 | pinsn <<= 32; |
| 15064 | pinsn |= bfd_get_32 (input_bfd, contents + rel->r_offset + 4); |
| 15065 | pinsn += ((2ULL << 56) + (-1ULL << 52) |
| 15066 | + (14ULL << 26) - (57ULL << 26) + (13ULL << 16)); |
| 15067 | bfd_put_32 (input_bfd, pinsn >> 32, |
| 15068 | contents + rel->r_offset); |
| 15069 | bfd_put_32 (input_bfd, pinsn & 0xffffffff, |
| 15070 | contents + rel->r_offset + 4); |
| 15071 | r_type = R_PPC64_TPREL34; |
| 15072 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
| 15073 | } |
| 15074 | break; |
| 15075 | |
| 15076 | case R_PPC64_TLS: |
| 15077 | if ((tls_mask & TLS_TLS) != 0 |
| 15078 | && (tls_mask & TLS_TPREL) == 0) |
| 15079 | { |
| 15080 | insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3)); |
| 15081 | insn = _bfd_elf_ppc_at_tls_transform (insn, 13); |
| 15082 | if (insn == 0) |
| 15083 | break; |
| 15084 | if ((rel->r_offset & 3) == 0) |
| 15085 | { |
| 15086 | bfd_put_32 (input_bfd, insn, contents + rel->r_offset); |
| 15087 | /* Was PPC64_TLS which sits on insn boundary, now |
| 15088 | PPC64_TPREL16_LO which is at low-order half-word. */ |
| 15089 | rel->r_offset += d_offset; |
| 15090 | r_type = R_PPC64_TPREL16_LO; |
| 15091 | if (toc_symndx != 0) |
| 15092 | { |
| 15093 | rel->r_info = ELF64_R_INFO (toc_symndx, r_type); |
| 15094 | rel->r_addend = toc_addend; |
| 15095 | /* We changed the symbol. Start over in order to |
| 15096 | get h, sym, sec etc. right. */ |
| 15097 | goto again; |
| 15098 | } |
| 15099 | else |
| 15100 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
| 15101 | } |
| 15102 | else if ((rel->r_offset & 3) == 1) |
| 15103 | { |
| 15104 | /* For pcrel IE to LE we already have the full |
| 15105 | offset and thus don't need an addi here. A nop |
| 15106 | or mr will do. */ |
| 15107 | if ((insn & (0x3fu << 26)) == 14 << 26) |
| 15108 | { |
| 15109 | /* Extract regs from addi rt,ra,si. */ |
| 15110 | unsigned int rt = (insn >> 21) & 0x1f; |
| 15111 | unsigned int ra = (insn >> 16) & 0x1f; |
| 15112 | if (rt == ra) |
| 15113 | insn = NOP; |
| 15114 | else |
| 15115 | { |
| 15116 | /* Build or ra,rs,rb with rb==rs, ie. mr ra,rs. */ |
| 15117 | insn = (rt << 16) | (ra << 21) | (ra << 11); |
| 15118 | insn |= (31u << 26) | (444u << 1); |
| 15119 | } |
| 15120 | } |
| 15121 | bfd_put_32 (input_bfd, insn, contents + rel->r_offset - 1); |
| 15122 | } |
| 15123 | } |
| 15124 | break; |
| 15125 | |
| 15126 | case R_PPC64_GOT_TLSGD16_HI: |
| 15127 | case R_PPC64_GOT_TLSGD16_HA: |
| 15128 | tls_gd = TLS_GDIE; |
| 15129 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0) |
| 15130 | goto tls_gdld_hi; |
| 15131 | break; |
| 15132 | |
| 15133 | case R_PPC64_GOT_TLSLD16_HI: |
| 15134 | case R_PPC64_GOT_TLSLD16_HA: |
| 15135 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0) |
| 15136 | { |
| 15137 | tls_gdld_hi: |
| 15138 | if ((tls_mask & tls_gd) != 0) |
| 15139 | r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3) |
| 15140 | + R_PPC64_GOT_TPREL16_DS); |
| 15141 | else |
| 15142 | { |
| 15143 | rel->r_offset -= d_offset; |
| 15144 | bfd_put_32 (input_bfd, NOP, contents + rel->r_offset); |
| 15145 | r_type = R_PPC64_NONE; |
| 15146 | } |
| 15147 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
| 15148 | } |
| 15149 | break; |
| 15150 | |
| 15151 | case R_PPC64_GOT_TLSGD16: |
| 15152 | case R_PPC64_GOT_TLSGD16_LO: |
| 15153 | tls_gd = TLS_GDIE; |
| 15154 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0) |
| 15155 | goto tls_ldgd_opt; |
| 15156 | break; |
| 15157 | |
| 15158 | case R_PPC64_GOT_TLSLD16: |
| 15159 | case R_PPC64_GOT_TLSLD16_LO: |
| 15160 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0) |
| 15161 | { |
| 15162 | unsigned int insn1, insn2; |
| 15163 | |
| 15164 | tls_ldgd_opt: |
| 15165 | offset = (bfd_vma) -1; |
| 15166 | /* If not using the newer R_PPC64_TLSGD/LD to mark |
| 15167 | __tls_get_addr calls, we must trust that the call |
| 15168 | stays with its arg setup insns, ie. that the next |
| 15169 | reloc is the __tls_get_addr call associated with |
| 15170 | the current reloc. Edit both insns. */ |
| 15171 | if (input_section->nomark_tls_get_addr |
| 15172 | && rel + 1 < relend |
| 15173 | && branch_reloc_hash_match (input_bfd, rel + 1, |
| 15174 | htab->tls_get_addr_fd, |
| 15175 | htab->tga_desc_fd, |
| 15176 | htab->tls_get_addr, |
| 15177 | htab->tga_desc)) |
| 15178 | offset = rel[1].r_offset; |
| 15179 | /* We read the low GOT_TLS (or TOC16) insn because we |
| 15180 | need to keep the destination reg. It may be |
| 15181 | something other than the usual r3, and moved to r3 |
| 15182 | before the call by intervening code. */ |
| 15183 | insn1 = bfd_get_32 (input_bfd, |
| 15184 | contents + rel->r_offset - d_offset); |
| 15185 | if ((tls_mask & tls_gd) != 0) |
| 15186 | { |
| 15187 | /* IE */ |
| 15188 | insn1 &= (0x1f << 21) | (0x1f << 16); |
| 15189 | insn1 |= 58u << 26; /* ld */ |
| 15190 | insn2 = 0x7c636a14; /* add 3,3,13 */ |
| 15191 | if (offset != (bfd_vma) -1) |
| 15192 | rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE); |
| 15193 | if (r_type == R_PPC64_TOC16 |
| 15194 | || r_type == R_PPC64_TOC16_LO) |
| 15195 | r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16; |
| 15196 | else |
| 15197 | r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 1)) & 1) |
| 15198 | + R_PPC64_GOT_TPREL16_DS); |
| 15199 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
| 15200 | } |
| 15201 | else |
| 15202 | { |
| 15203 | /* LE */ |
| 15204 | insn1 &= 0x1f << 21; |
| 15205 | insn1 |= 0x3c0d0000; /* addis r,13,0 */ |
| 15206 | insn2 = 0x38630000; /* addi 3,3,0 */ |
| 15207 | if (tls_gd == 0) |
| 15208 | { |
| 15209 | /* Was an LD reloc. */ |
| 15210 | r_symndx = STN_UNDEF; |
| 15211 | rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET; |
| 15212 | } |
| 15213 | else if (toc_symndx != 0) |
| 15214 | { |
| 15215 | r_symndx = toc_symndx; |
| 15216 | rel->r_addend = toc_addend; |
| 15217 | } |
| 15218 | r_type = R_PPC64_TPREL16_HA; |
| 15219 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
| 15220 | if (offset != (bfd_vma) -1) |
| 15221 | { |
| 15222 | rel[1].r_info = ELF64_R_INFO (r_symndx, |
| 15223 | R_PPC64_TPREL16_LO); |
| 15224 | rel[1].r_offset = offset + d_offset; |
| 15225 | rel[1].r_addend = rel->r_addend; |
| 15226 | } |
| 15227 | } |
| 15228 | bfd_put_32 (input_bfd, insn1, |
| 15229 | contents + rel->r_offset - d_offset); |
| 15230 | if (offset != (bfd_vma) -1) |
| 15231 | { |
| 15232 | bfd_put_32 (input_bfd, insn2, contents + offset); |
| 15233 | if (offset + 8 <= input_section->size) |
| 15234 | { |
| 15235 | insn2 = bfd_get_32 (input_bfd, contents + offset + 4); |
| 15236 | if (insn2 == LD_R2_0R1 + STK_TOC (htab)) |
| 15237 | bfd_put_32 (input_bfd, NOP, contents + offset + 4); |
| 15238 | } |
| 15239 | } |
| 15240 | if ((tls_mask & tls_gd) == 0 |
| 15241 | && (tls_gd == 0 || toc_symndx != 0)) |
| 15242 | { |
| 15243 | /* We changed the symbol. Start over in order |
| 15244 | to get h, sym, sec etc. right. */ |
| 15245 | goto again; |
| 15246 | } |
| 15247 | } |
| 15248 | break; |
| 15249 | |
| 15250 | case R_PPC64_GOT_TLSGD34: |
| 15251 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0) |
| 15252 | { |
| 15253 | pinsn = bfd_get_32 (input_bfd, contents + rel->r_offset); |
| 15254 | pinsn <<= 32; |
| 15255 | pinsn |= bfd_get_32 (input_bfd, contents + rel->r_offset + 4); |
| 15256 | if ((tls_mask & TLS_GDIE) != 0) |
| 15257 | { |
| 15258 | /* IE, pla -> pld */ |
| 15259 | pinsn += (-2ULL << 56) + (57ULL << 26) - (14ULL << 26); |
| 15260 | r_type = R_PPC64_GOT_TPREL34; |
| 15261 | } |
| 15262 | else |
| 15263 | { |
| 15264 | /* LE, pla pcrel -> paddi r13 */ |
| 15265 | pinsn += (-1ULL << 52) + (13ULL << 16); |
| 15266 | r_type = R_PPC64_TPREL34; |
| 15267 | } |
| 15268 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
| 15269 | bfd_put_32 (input_bfd, pinsn >> 32, |
| 15270 | contents + rel->r_offset); |
| 15271 | bfd_put_32 (input_bfd, pinsn & 0xffffffff, |
| 15272 | contents + rel->r_offset + 4); |
| 15273 | } |
| 15274 | break; |
| 15275 | |
| 15276 | case R_PPC64_GOT_TLSLD34: |
| 15277 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0) |
| 15278 | { |
| 15279 | pinsn = bfd_get_32 (input_bfd, contents + rel->r_offset); |
| 15280 | pinsn <<= 32; |
| 15281 | pinsn |= bfd_get_32 (input_bfd, contents + rel->r_offset + 4); |
| 15282 | pinsn += (-1ULL << 52) + (13ULL << 16); |
| 15283 | bfd_put_32 (input_bfd, pinsn >> 32, |
| 15284 | contents + rel->r_offset); |
| 15285 | bfd_put_32 (input_bfd, pinsn & 0xffffffff, |
| 15286 | contents + rel->r_offset + 4); |
| 15287 | rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET; |
| 15288 | r_symndx = STN_UNDEF; |
| 15289 | r_type = R_PPC64_TPREL34; |
| 15290 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
| 15291 | goto again; |
| 15292 | } |
| 15293 | break; |
| 15294 | |
| 15295 | case R_PPC64_TLSGD: |
| 15296 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0 |
| 15297 | && rel + 1 < relend) |
| 15298 | { |
| 15299 | unsigned int insn2; |
| 15300 | enum elf_ppc64_reloc_type r_type1 = ELF64_R_TYPE (rel[1].r_info); |
| 15301 | |
| 15302 | offset = rel->r_offset; |
| 15303 | if (is_plt_seq_reloc (r_type1)) |
| 15304 | { |
| 15305 | bfd_put_32 (output_bfd, NOP, contents + offset); |
| 15306 | if (r_type1 == R_PPC64_PLT_PCREL34 |
| 15307 | || r_type1 == R_PPC64_PLT_PCREL34_NOTOC) |
| 15308 | bfd_put_32 (output_bfd, NOP, contents + offset + 4); |
| 15309 | rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE); |
| 15310 | break; |
| 15311 | } |
| 15312 | |
| 15313 | if (ELF64_R_TYPE (rel[1].r_info) == R_PPC64_PLTCALL) |
| 15314 | bfd_put_32 (output_bfd, NOP, contents + offset + 4); |
| 15315 | |
| 15316 | if ((tls_mask & TLS_GDIE) != 0) |
| 15317 | { |
| 15318 | /* IE */ |
| 15319 | r_type = R_PPC64_NONE; |
| 15320 | insn2 = 0x7c636a14; /* add 3,3,13 */ |
| 15321 | } |
| 15322 | else |
| 15323 | { |
| 15324 | /* LE */ |
| 15325 | if (toc_symndx != 0) |
| 15326 | { |
| 15327 | r_symndx = toc_symndx; |
| 15328 | rel->r_addend = toc_addend; |
| 15329 | } |
| 15330 | if (r_type1 == R_PPC64_REL24_NOTOC |
| 15331 | || r_type1 == R_PPC64_PLTCALL_NOTOC) |
| 15332 | { |
| 15333 | r_type = R_PPC64_NONE; |
| 15334 | insn2 = NOP; |
| 15335 | } |
| 15336 | else |
| 15337 | { |
| 15338 | rel->r_offset = offset + d_offset; |
| 15339 | r_type = R_PPC64_TPREL16_LO; |
| 15340 | insn2 = 0x38630000; /* addi 3,3,0 */ |
| 15341 | } |
| 15342 | } |
| 15343 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
| 15344 | /* Zap the reloc on the _tls_get_addr call too. */ |
| 15345 | BFD_ASSERT (offset == rel[1].r_offset); |
| 15346 | rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE); |
| 15347 | bfd_put_32 (input_bfd, insn2, contents + offset); |
| 15348 | if ((tls_mask & TLS_GDIE) == 0 |
| 15349 | && toc_symndx != 0 |
| 15350 | && r_type != R_PPC64_NONE) |
| 15351 | goto again; |
| 15352 | } |
| 15353 | break; |
| 15354 | |
| 15355 | case R_PPC64_TLSLD: |
| 15356 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0 |
| 15357 | && rel + 1 < relend) |
| 15358 | { |
| 15359 | unsigned int insn2; |
| 15360 | enum elf_ppc64_reloc_type r_type1 = ELF64_R_TYPE (rel[1].r_info); |
| 15361 | |
| 15362 | offset = rel->r_offset; |
| 15363 | if (is_plt_seq_reloc (r_type1)) |
| 15364 | { |
| 15365 | bfd_put_32 (output_bfd, NOP, contents + offset); |
| 15366 | if (r_type1 == R_PPC64_PLT_PCREL34 |
| 15367 | || r_type1 == R_PPC64_PLT_PCREL34_NOTOC) |
| 15368 | bfd_put_32 (output_bfd, NOP, contents + offset + 4); |
| 15369 | rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE); |
| 15370 | break; |
| 15371 | } |
| 15372 | |
| 15373 | if (ELF64_R_TYPE (rel[1].r_info) == R_PPC64_PLTCALL) |
| 15374 | bfd_put_32 (output_bfd, NOP, contents + offset + 4); |
| 15375 | |
| 15376 | if (r_type1 == R_PPC64_REL24_NOTOC |
| 15377 | || r_type1 == R_PPC64_PLTCALL_NOTOC) |
| 15378 | { |
| 15379 | r_type = R_PPC64_NONE; |
| 15380 | insn2 = NOP; |
| 15381 | } |
| 15382 | else |
| 15383 | { |
| 15384 | rel->r_offset = offset + d_offset; |
| 15385 | r_symndx = STN_UNDEF; |
| 15386 | r_type = R_PPC64_TPREL16_LO; |
| 15387 | rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET; |
| 15388 | insn2 = 0x38630000; /* addi 3,3,0 */ |
| 15389 | } |
| 15390 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
| 15391 | /* Zap the reloc on the _tls_get_addr call too. */ |
| 15392 | BFD_ASSERT (offset == rel[1].r_offset); |
| 15393 | rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE); |
| 15394 | bfd_put_32 (input_bfd, insn2, contents + offset); |
| 15395 | if (r_type != R_PPC64_NONE) |
| 15396 | goto again; |
| 15397 | } |
| 15398 | break; |
| 15399 | |
| 15400 | case R_PPC64_DTPMOD64: |
| 15401 | if (rel + 1 < relend |
| 15402 | && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64) |
| 15403 | && rel[1].r_offset == rel->r_offset + 8) |
| 15404 | { |
| 15405 | if ((tls_mask & TLS_GD) == 0) |
| 15406 | { |
| 15407 | rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE); |
| 15408 | if ((tls_mask & TLS_GDIE) != 0) |
| 15409 | r_type = R_PPC64_TPREL64; |
| 15410 | else |
| 15411 | { |
| 15412 | bfd_put_64 (output_bfd, 1, contents + rel->r_offset); |
| 15413 | r_type = R_PPC64_NONE; |
| 15414 | } |
| 15415 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
| 15416 | } |
| 15417 | } |
| 15418 | else |
| 15419 | { |
| 15420 | if ((tls_mask & TLS_LD) == 0) |
| 15421 | { |
| 15422 | bfd_put_64 (output_bfd, 1, contents + rel->r_offset); |
| 15423 | r_type = R_PPC64_NONE; |
| 15424 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
| 15425 | } |
| 15426 | } |
| 15427 | break; |
| 15428 | |
| 15429 | case R_PPC64_TPREL64: |
| 15430 | if ((tls_mask & TLS_TPREL) == 0) |
| 15431 | { |
| 15432 | r_type = R_PPC64_NONE; |
| 15433 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
| 15434 | } |
| 15435 | break; |
| 15436 | |
| 15437 | case R_PPC64_ENTRY: |
| 15438 | relocation = TOCstart + htab->sec_info[input_section->id].toc_off; |
| 15439 | if (!bfd_link_pic (info) |
| 15440 | && !info->traditional_format |
| 15441 | && relocation + 0x80008000 <= 0xffffffff) |
| 15442 | { |
| 15443 | unsigned int insn1, insn2; |
| 15444 | |
| 15445 | insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset); |
| 15446 | insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4); |
| 15447 | if ((insn1 & ~0xfffc) == LD_R2_0R12 |
| 15448 | && insn2 == ADD_R2_R2_R12) |
| 15449 | { |
| 15450 | bfd_put_32 (input_bfd, |
| 15451 | LIS_R2 + PPC_HA (relocation), |
| 15452 | contents + rel->r_offset); |
| 15453 | bfd_put_32 (input_bfd, |
| 15454 | ADDI_R2_R2 + PPC_LO (relocation), |
| 15455 | contents + rel->r_offset + 4); |
| 15456 | } |
| 15457 | } |
| 15458 | else |
| 15459 | { |
| 15460 | relocation -= (rel->r_offset |
| 15461 | + input_section->output_offset |
| 15462 | + input_section->output_section->vma); |
| 15463 | if (relocation + 0x80008000 <= 0xffffffff) |
| 15464 | { |
| 15465 | unsigned int insn1, insn2; |
| 15466 | |
| 15467 | insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset); |
| 15468 | insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4); |
| 15469 | if ((insn1 & ~0xfffc) == LD_R2_0R12 |
| 15470 | && insn2 == ADD_R2_R2_R12) |
| 15471 | { |
| 15472 | bfd_put_32 (input_bfd, |
| 15473 | ADDIS_R2_R12 + PPC_HA (relocation), |
| 15474 | contents + rel->r_offset); |
| 15475 | bfd_put_32 (input_bfd, |
| 15476 | ADDI_R2_R2 + PPC_LO (relocation), |
| 15477 | contents + rel->r_offset + 4); |
| 15478 | } |
| 15479 | } |
| 15480 | } |
| 15481 | break; |
| 15482 | |
| 15483 | case R_PPC64_REL16_HA: |
| 15484 | /* If we are generating a non-PIC executable, edit |
| 15485 | . 0: addis 2,12,.TOC.-0b@ha |
| 15486 | . addi 2,2,.TOC.-0b@l |
| 15487 | used by ELFv2 global entry points to set up r2, to |
| 15488 | . lis 2,.TOC.@ha |
| 15489 | . addi 2,2,.TOC.@l |
| 15490 | if .TOC. is in range. */ |
| 15491 | if (!bfd_link_pic (info) |
| 15492 | && !info->traditional_format |
| 15493 | && !htab->opd_abi |
| 15494 | && rel->r_addend == d_offset |
| 15495 | && h != NULL && &h->elf == htab->elf.hgot |
| 15496 | && rel + 1 < relend |
| 15497 | && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_REL16_LO) |
| 15498 | && rel[1].r_offset == rel->r_offset + 4 |
| 15499 | && rel[1].r_addend == rel->r_addend + 4 |
| 15500 | && relocation + 0x80008000 <= 0xffffffff) |
| 15501 | { |
| 15502 | unsigned int insn1, insn2; |
| 15503 | offset = rel->r_offset - d_offset; |
| 15504 | insn1 = bfd_get_32 (input_bfd, contents + offset); |
| 15505 | insn2 = bfd_get_32 (input_bfd, contents + offset + 4); |
| 15506 | if ((insn1 & 0xffff0000) == ADDIS_R2_R12 |
| 15507 | && (insn2 & 0xffff0000) == ADDI_R2_R2) |
| 15508 | { |
| 15509 | r_type = R_PPC64_ADDR16_HA; |
| 15510 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
| 15511 | rel->r_addend -= d_offset; |
| 15512 | rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_ADDR16_LO); |
| 15513 | rel[1].r_addend -= d_offset + 4; |
| 15514 | bfd_put_32 (input_bfd, LIS_R2, contents + offset); |
| 15515 | } |
| 15516 | } |
| 15517 | break; |
| 15518 | } |
| 15519 | |
| 15520 | /* Handle other relocations that tweak non-addend part of insn. */ |
| 15521 | insn = 0; |
| 15522 | max_br_offset = 1 << 25; |
| 15523 | addend = rel->r_addend; |
| 15524 | reloc_dest = DEST_NORMAL; |
| 15525 | switch (r_type) |
| 15526 | { |
| 15527 | default: |
| 15528 | break; |
| 15529 | |
| 15530 | case R_PPC64_TOCSAVE: |
| 15531 | if (relocation + addend == (rel->r_offset |
| 15532 | + input_section->output_offset |
| 15533 | + input_section->output_section->vma) |
| 15534 | && tocsave_find (htab, NO_INSERT, |
| 15535 | &local_syms, rel, input_bfd)) |
| 15536 | { |
| 15537 | insn = bfd_get_32 (input_bfd, contents + rel->r_offset); |
| 15538 | if (insn == NOP |
| 15539 | || insn == CROR_151515 || insn == CROR_313131) |
| 15540 | bfd_put_32 (input_bfd, |
| 15541 | STD_R2_0R1 + STK_TOC (htab), |
| 15542 | contents + rel->r_offset); |
| 15543 | } |
| 15544 | break; |
| 15545 | |
| 15546 | /* Branch taken prediction relocations. */ |
| 15547 | case R_PPC64_ADDR14_BRTAKEN: |
| 15548 | case R_PPC64_REL14_BRTAKEN: |
| 15549 | insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */ |
| 15550 | /* Fall through. */ |
| 15551 | |
| 15552 | /* Branch not taken prediction relocations. */ |
| 15553 | case R_PPC64_ADDR14_BRNTAKEN: |
| 15554 | case R_PPC64_REL14_BRNTAKEN: |
| 15555 | insn |= bfd_get_32 (input_bfd, |
| 15556 | contents + rel->r_offset) & ~(0x01 << 21); |
| 15557 | /* Fall through. */ |
| 15558 | |
| 15559 | case R_PPC64_REL14: |
| 15560 | max_br_offset = 1 << 15; |
| 15561 | /* Fall through. */ |
| 15562 | |
| 15563 | case R_PPC64_REL24: |
| 15564 | case R_PPC64_REL24_NOTOC: |
| 15565 | case R_PPC64_PLTCALL: |
| 15566 | case R_PPC64_PLTCALL_NOTOC: |
| 15567 | /* Calls to functions with a different TOC, such as calls to |
| 15568 | shared objects, need to alter the TOC pointer. This is |
| 15569 | done using a linkage stub. A REL24 branching to these |
| 15570 | linkage stubs needs to be followed by a nop, as the nop |
| 15571 | will be replaced with an instruction to restore the TOC |
| 15572 | base pointer. */ |
| 15573 | fdh = h; |
| 15574 | if (h != NULL |
| 15575 | && h->oh != NULL |
| 15576 | && h->oh->is_func_descriptor) |
| 15577 | fdh = ppc_follow_link (h->oh); |
| 15578 | stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel, |
| 15579 | htab); |
| 15580 | if ((r_type == R_PPC64_PLTCALL |
| 15581 | || r_type == R_PPC64_PLTCALL_NOTOC) |
| 15582 | && stub_entry != NULL |
| 15583 | && stub_entry->stub_type >= ppc_stub_plt_call |
| 15584 | && stub_entry->stub_type <= ppc_stub_plt_call_both) |
| 15585 | stub_entry = NULL; |
| 15586 | |
| 15587 | if (stub_entry != NULL |
| 15588 | && ((stub_entry->stub_type >= ppc_stub_plt_call |
| 15589 | && stub_entry->stub_type <= ppc_stub_plt_call_both) |
| 15590 | || stub_entry->stub_type == ppc_stub_plt_branch_r2off |
| 15591 | || stub_entry->stub_type == ppc_stub_plt_branch_both |
| 15592 | || stub_entry->stub_type == ppc_stub_long_branch_r2off |
| 15593 | || stub_entry->stub_type == ppc_stub_long_branch_both)) |
| 15594 | { |
| 15595 | bfd_boolean can_plt_call = FALSE; |
| 15596 | |
| 15597 | if (stub_entry->stub_type == ppc_stub_plt_call |
| 15598 | && !htab->opd_abi |
| 15599 | && htab->params->plt_localentry0 != 0 |
| 15600 | && is_elfv2_localentry0 (&h->elf)) |
| 15601 | { |
| 15602 | /* The function doesn't use or change r2. */ |
| 15603 | can_plt_call = TRUE; |
| 15604 | } |
| 15605 | else if (r_type == R_PPC64_REL24_NOTOC) |
| 15606 | { |
| 15607 | /* NOTOC calls don't need to restore r2. */ |
| 15608 | can_plt_call = TRUE; |
| 15609 | } |
| 15610 | |
| 15611 | /* All of these stubs may modify r2, so there must be a |
| 15612 | branch and link followed by a nop. The nop is |
| 15613 | replaced by an insn to restore r2. */ |
| 15614 | else if (rel->r_offset + 8 <= input_section->size) |
| 15615 | { |
| 15616 | unsigned long br; |
| 15617 | |
| 15618 | br = bfd_get_32 (input_bfd, |
| 15619 | contents + rel->r_offset); |
| 15620 | if ((br & 1) != 0) |
| 15621 | { |
| 15622 | unsigned long nop; |
| 15623 | |
| 15624 | nop = bfd_get_32 (input_bfd, |
| 15625 | contents + rel->r_offset + 4); |
| 15626 | if (nop == LD_R2_0R1 + STK_TOC (htab)) |
| 15627 | can_plt_call = TRUE; |
| 15628 | else if (nop == NOP |
| 15629 | || nop == CROR_151515 |
| 15630 | || nop == CROR_313131) |
| 15631 | { |
| 15632 | if (h != NULL |
| 15633 | && is_tls_get_addr (&h->elf, htab) |
| 15634 | && htab->params->tls_get_addr_opt) |
| 15635 | { |
| 15636 | /* Special stub used, leave nop alone. */ |
| 15637 | } |
| 15638 | else |
| 15639 | bfd_put_32 (input_bfd, |
| 15640 | LD_R2_0R1 + STK_TOC (htab), |
| 15641 | contents + rel->r_offset + 4); |
| 15642 | can_plt_call = TRUE; |
| 15643 | } |
| 15644 | } |
| 15645 | } |
| 15646 | |
| 15647 | if (!can_plt_call && h != NULL) |
| 15648 | { |
| 15649 | const char *name = h->elf.root.root.string; |
| 15650 | |
| 15651 | if (*name == '.') |
| 15652 | ++name; |
| 15653 | |
| 15654 | if (strncmp (name, "__libc_start_main", 17) == 0 |
| 15655 | && (name[17] == 0 || name[17] == '@')) |
| 15656 | { |
| 15657 | /* Allow crt1 branch to go via a toc adjusting |
| 15658 | stub. Other calls that never return could do |
| 15659 | the same, if we could detect such. */ |
| 15660 | can_plt_call = TRUE; |
| 15661 | } |
| 15662 | } |
| 15663 | |
| 15664 | if (!can_plt_call) |
| 15665 | { |
| 15666 | /* g++ as of 20130507 emits self-calls without a |
| 15667 | following nop. This is arguably wrong since we |
| 15668 | have conflicting information. On the one hand a |
| 15669 | global symbol and on the other a local call |
| 15670 | sequence, but don't error for this special case. |
| 15671 | It isn't possible to cheaply verify we have |
| 15672 | exactly such a call. Allow all calls to the same |
| 15673 | section. */ |
| 15674 | asection *code_sec = sec; |
| 15675 | |
| 15676 | if (get_opd_info (sec) != NULL) |
| 15677 | { |
| 15678 | bfd_vma off = (relocation + addend |
| 15679 | - sec->output_section->vma |
| 15680 | - sec->output_offset); |
| 15681 | |
| 15682 | opd_entry_value (sec, off, &code_sec, NULL, FALSE); |
| 15683 | } |
| 15684 | if (code_sec == input_section) |
| 15685 | can_plt_call = TRUE; |
| 15686 | } |
| 15687 | |
| 15688 | if (!can_plt_call) |
| 15689 | { |
| 15690 | if (stub_entry->stub_type >= ppc_stub_plt_call |
| 15691 | && stub_entry->stub_type <= ppc_stub_plt_call_both) |
| 15692 | info->callbacks->einfo |
| 15693 | /* xgettext:c-format */ |
| 15694 | (_("%H: call to `%pT' lacks nop, can't restore toc; " |
| 15695 | "(plt call stub)\n"), |
| 15696 | input_bfd, input_section, rel->r_offset, sym_name); |
| 15697 | else |
| 15698 | info->callbacks->einfo |
| 15699 | /* xgettext:c-format */ |
| 15700 | (_("%H: call to `%pT' lacks nop, can't restore toc; " |
| 15701 | "(toc save/adjust stub)\n"), |
| 15702 | input_bfd, input_section, rel->r_offset, sym_name); |
| 15703 | |
| 15704 | bfd_set_error (bfd_error_bad_value); |
| 15705 | ret = FALSE; |
| 15706 | } |
| 15707 | |
| 15708 | if (can_plt_call |
| 15709 | && stub_entry->stub_type >= ppc_stub_plt_call |
| 15710 | && stub_entry->stub_type <= ppc_stub_plt_call_both) |
| 15711 | unresolved_reloc = FALSE; |
| 15712 | } |
| 15713 | |
| 15714 | if ((stub_entry == NULL |
| 15715 | || stub_entry->stub_type == ppc_stub_long_branch |
| 15716 | || stub_entry->stub_type == ppc_stub_plt_branch) |
| 15717 | && get_opd_info (sec) != NULL) |
| 15718 | { |
| 15719 | /* The branch destination is the value of the opd entry. */ |
| 15720 | bfd_vma off = (relocation + addend |
| 15721 | - sec->output_section->vma |
| 15722 | - sec->output_offset); |
| 15723 | bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, FALSE); |
| 15724 | if (dest != (bfd_vma) -1) |
| 15725 | { |
| 15726 | relocation = dest; |
| 15727 | addend = 0; |
| 15728 | reloc_dest = DEST_OPD; |
| 15729 | } |
| 15730 | } |
| 15731 | |
| 15732 | /* If the branch is out of reach we ought to have a long |
| 15733 | branch stub. */ |
| 15734 | from = (rel->r_offset |
| 15735 | + input_section->output_offset |
| 15736 | + input_section->output_section->vma); |
| 15737 | |
| 15738 | relocation += PPC64_LOCAL_ENTRY_OFFSET (fdh |
| 15739 | ? fdh->elf.other |
| 15740 | : sym->st_other); |
| 15741 | |
| 15742 | if (stub_entry != NULL |
| 15743 | && (stub_entry->stub_type == ppc_stub_long_branch |
| 15744 | || stub_entry->stub_type == ppc_stub_plt_branch) |
| 15745 | && (r_type == R_PPC64_ADDR14_BRTAKEN |
| 15746 | || r_type == R_PPC64_ADDR14_BRNTAKEN |
| 15747 | || (relocation + addend - from + max_br_offset |
| 15748 | < 2 * max_br_offset))) |
| 15749 | /* Don't use the stub if this branch is in range. */ |
| 15750 | stub_entry = NULL; |
| 15751 | |
| 15752 | if (stub_entry != NULL |
| 15753 | && (stub_entry->stub_type == ppc_stub_long_branch_notoc |
| 15754 | || stub_entry->stub_type == ppc_stub_long_branch_both |
| 15755 | || stub_entry->stub_type == ppc_stub_plt_branch_notoc |
| 15756 | || stub_entry->stub_type == ppc_stub_plt_branch_both) |
| 15757 | && (r_type != R_PPC64_REL24_NOTOC |
| 15758 | || ((fdh ? fdh->elf.other : sym->st_other) |
| 15759 | & STO_PPC64_LOCAL_MASK) <= 1 << STO_PPC64_LOCAL_BIT) |
| 15760 | && (relocation + addend - from + max_br_offset |
| 15761 | < 2 * max_br_offset)) |
| 15762 | stub_entry = NULL; |
| 15763 | |
| 15764 | if (stub_entry != NULL |
| 15765 | && (stub_entry->stub_type == ppc_stub_long_branch_r2off |
| 15766 | || stub_entry->stub_type == ppc_stub_long_branch_both |
| 15767 | || stub_entry->stub_type == ppc_stub_plt_branch_r2off |
| 15768 | || stub_entry->stub_type == ppc_stub_plt_branch_both) |
| 15769 | && r_type == R_PPC64_REL24_NOTOC |
| 15770 | && (relocation + addend - from + max_br_offset |
| 15771 | < 2 * max_br_offset)) |
| 15772 | stub_entry = NULL; |
| 15773 | |
| 15774 | if (stub_entry != NULL) |
| 15775 | { |
| 15776 | /* Munge up the value and addend so that we call the stub |
| 15777 | rather than the procedure directly. */ |
| 15778 | asection *stub_sec = stub_entry->group->stub_sec; |
| 15779 | |
| 15780 | if (stub_entry->stub_type == ppc_stub_save_res) |
| 15781 | relocation += (stub_sec->output_offset |
| 15782 | + stub_sec->output_section->vma |
| 15783 | + stub_sec->size - htab->sfpr->size |
| 15784 | - htab->sfpr->output_offset |
| 15785 | - htab->sfpr->output_section->vma); |
| 15786 | else |
| 15787 | relocation = (stub_entry->stub_offset |
| 15788 | + stub_sec->output_offset |
| 15789 | + stub_sec->output_section->vma); |
| 15790 | addend = 0; |
| 15791 | reloc_dest = DEST_STUB; |
| 15792 | |
| 15793 | if (((stub_entry->stub_type == ppc_stub_plt_call |
| 15794 | && ALWAYS_EMIT_R2SAVE) |
| 15795 | || stub_entry->stub_type == ppc_stub_plt_call_r2save |
| 15796 | || stub_entry->stub_type == ppc_stub_plt_call_both) |
| 15797 | && !(h != NULL |
| 15798 | && is_tls_get_addr (&h->elf, htab) |
| 15799 | && htab->params->tls_get_addr_opt) |
| 15800 | && rel + 1 < relend |
| 15801 | && rel[1].r_offset == rel->r_offset + 4 |
| 15802 | && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE) |
| 15803 | relocation += 4; |
| 15804 | else if ((stub_entry->stub_type == ppc_stub_long_branch_both |
| 15805 | || stub_entry->stub_type == ppc_stub_plt_branch_both |
| 15806 | || stub_entry->stub_type == ppc_stub_plt_call_both) |
| 15807 | && r_type == R_PPC64_REL24_NOTOC) |
| 15808 | relocation += 4; |
| 15809 | |
| 15810 | if (r_type == R_PPC64_REL24_NOTOC |
| 15811 | && (stub_entry->stub_type == ppc_stub_plt_call_notoc |
| 15812 | || stub_entry->stub_type == ppc_stub_plt_call_both)) |
| 15813 | htab->notoc_plt = 1; |
| 15814 | } |
| 15815 | |
| 15816 | if (insn != 0) |
| 15817 | { |
| 15818 | if (is_isa_v2) |
| 15819 | { |
| 15820 | /* Set 'a' bit. This is 0b00010 in BO field for branch |
| 15821 | on CR(BI) insns (BO == 001at or 011at), and 0b01000 |
| 15822 | for branch on CTR insns (BO == 1a00t or 1a01t). */ |
| 15823 | if ((insn & (0x14 << 21)) == (0x04 << 21)) |
| 15824 | insn |= 0x02 << 21; |
| 15825 | else if ((insn & (0x14 << 21)) == (0x10 << 21)) |
| 15826 | insn |= 0x08 << 21; |
| 15827 | else |
| 15828 | break; |
| 15829 | } |
| 15830 | else |
| 15831 | { |
| 15832 | /* Invert 'y' bit if not the default. */ |
| 15833 | if ((bfd_signed_vma) (relocation + addend - from) < 0) |
| 15834 | insn ^= 0x01 << 21; |
| 15835 | } |
| 15836 | |
| 15837 | bfd_put_32 (input_bfd, insn, contents + rel->r_offset); |
| 15838 | } |
| 15839 | |
| 15840 | /* NOP out calls to undefined weak functions. |
| 15841 | We can thus call a weak function without first |
| 15842 | checking whether the function is defined. */ |
| 15843 | else if (h != NULL |
| 15844 | && h->elf.root.type == bfd_link_hash_undefweak |
| 15845 | && h->elf.dynindx == -1 |
| 15846 | && (r_type == R_PPC64_REL24 |
| 15847 | || r_type == R_PPC64_REL24_NOTOC) |
| 15848 | && relocation == 0 |
| 15849 | && addend == 0) |
| 15850 | { |
| 15851 | bfd_put_32 (input_bfd, NOP, contents + rel->r_offset); |
| 15852 | goto copy_reloc; |
| 15853 | } |
| 15854 | break; |
| 15855 | |
| 15856 | case R_PPC64_GOT16_DS: |
| 15857 | if ((h ? h->elf.type : ELF_ST_TYPE (sym->st_info)) == STT_GNU_IFUNC) |
| 15858 | break; |
| 15859 | from = TOCstart + htab->sec_info[input_section->id].toc_off; |
| 15860 | if (relocation + addend - from + 0x8000 < 0x10000 |
| 15861 | && SYMBOL_REFERENCES_LOCAL (info, &h->elf)) |
| 15862 | { |
| 15863 | insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3)); |
| 15864 | if ((insn & (0x3fu << 26 | 0x3)) == 58u << 26 /* ld */) |
| 15865 | { |
| 15866 | insn += (14u << 26) - (58u << 26); |
| 15867 | bfd_put_32 (input_bfd, insn, contents + (rel->r_offset & ~3)); |
| 15868 | r_type = R_PPC64_TOC16; |
| 15869 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
| 15870 | } |
| 15871 | } |
| 15872 | break; |
| 15873 | |
| 15874 | case R_PPC64_GOT16_LO_DS: |
| 15875 | case R_PPC64_GOT16_HA: |
| 15876 | if ((h ? h->elf.type : ELF_ST_TYPE (sym->st_info)) == STT_GNU_IFUNC) |
| 15877 | break; |
| 15878 | from = TOCstart + htab->sec_info[input_section->id].toc_off; |
| 15879 | if (relocation + addend - from + 0x80008000ULL < 0x100000000ULL |
| 15880 | && SYMBOL_REFERENCES_LOCAL (info, &h->elf)) |
| 15881 | { |
| 15882 | insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3)); |
| 15883 | if ((insn & (0x3fu << 26 | 0x3)) == 58u << 26 /* ld */) |
| 15884 | { |
| 15885 | insn += (14u << 26) - (58u << 26); |
| 15886 | bfd_put_32 (input_bfd, insn, contents + (rel->r_offset & ~3)); |
| 15887 | r_type = R_PPC64_TOC16_LO; |
| 15888 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
| 15889 | } |
| 15890 | else if ((insn & (0x3fu << 26)) == 15u << 26 /* addis */) |
| 15891 | { |
| 15892 | r_type = R_PPC64_TOC16_HA; |
| 15893 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
| 15894 | } |
| 15895 | } |
| 15896 | break; |
| 15897 | |
| 15898 | case R_PPC64_GOT_PCREL34: |
| 15899 | if ((h ? h->elf.type : ELF_ST_TYPE (sym->st_info)) == STT_GNU_IFUNC) |
| 15900 | break; |
| 15901 | from = (rel->r_offset |
| 15902 | + input_section->output_section->vma |
| 15903 | + input_section->output_offset); |
| 15904 | if (relocation - from + (1ULL << 33) < 1ULL << 34 |
| 15905 | && SYMBOL_REFERENCES_LOCAL (info, &h->elf)) |
| 15906 | { |
| 15907 | offset = rel->r_offset; |
| 15908 | pinsn = bfd_get_32 (input_bfd, contents + offset); |
| 15909 | pinsn <<= 32; |
| 15910 | pinsn |= bfd_get_32 (input_bfd, contents + offset + 4); |
| 15911 | if ((pinsn & ((-1ULL << 50) | (63ULL << 26))) |
| 15912 | == ((1ULL << 58) | (1ULL << 52) | (57ULL << 26) /* pld */)) |
| 15913 | { |
| 15914 | /* Replace with paddi. */ |
| 15915 | pinsn += (2ULL << 56) + (14ULL << 26) - (57ULL << 26); |
| 15916 | r_type = R_PPC64_PCREL34; |
| 15917 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
| 15918 | bfd_put_32 (input_bfd, pinsn >> 32, contents + offset); |
| 15919 | bfd_put_32 (input_bfd, pinsn, contents + offset + 4); |
| 15920 | goto pcrelopt; |
| 15921 | } |
| 15922 | } |
| 15923 | break; |
| 15924 | |
| 15925 | case R_PPC64_PCREL34: |
| 15926 | if (SYMBOL_REFERENCES_LOCAL (info, &h->elf)) |
| 15927 | { |
| 15928 | offset = rel->r_offset; |
| 15929 | pinsn = bfd_get_32 (input_bfd, contents + offset); |
| 15930 | pinsn <<= 32; |
| 15931 | pinsn |= bfd_get_32 (input_bfd, contents + offset + 4); |
| 15932 | if ((pinsn & ((-1ULL << 50) | (63ULL << 26))) |
| 15933 | == ((1ULL << 58) | (2ULL << 56) | (1ULL << 52) |
| 15934 | | (14ULL << 26) /* paddi */)) |
| 15935 | { |
| 15936 | pcrelopt: |
| 15937 | if (rel + 1 < relend |
| 15938 | && rel[1].r_offset == offset |
| 15939 | && rel[1].r_info == ELF64_R_INFO (0, R_PPC64_PCREL_OPT)) |
| 15940 | { |
| 15941 | bfd_vma off2 = rel[1].r_addend; |
| 15942 | if (off2 == 0) |
| 15943 | /* zero means next insn. */ |
| 15944 | off2 = 8; |
| 15945 | off2 += offset; |
| 15946 | if (off2 + 4 <= input_section->size) |
| 15947 | { |
| 15948 | uint64_t pinsn2; |
| 15949 | bfd_signed_vma addend_off; |
| 15950 | pinsn2 = bfd_get_32 (input_bfd, contents + off2); |
| 15951 | pinsn2 <<= 32; |
| 15952 | if ((pinsn2 & (63ULL << 58)) == 1ULL << 58) |
| 15953 | { |
| 15954 | if (off2 + 8 > input_section->size) |
| 15955 | break; |
| 15956 | pinsn2 |= bfd_get_32 (input_bfd, |
| 15957 | contents + off2 + 4); |
| 15958 | } |
| 15959 | if (xlate_pcrel_opt (&pinsn, &pinsn2, &addend_off)) |
| 15960 | { |
| 15961 | addend += addend_off; |
| 15962 | rel->r_addend = addend; |
| 15963 | bfd_put_32 (input_bfd, pinsn >> 32, |
| 15964 | contents + offset); |
| 15965 | bfd_put_32 (input_bfd, pinsn, |
| 15966 | contents + offset + 4); |
| 15967 | bfd_put_32 (input_bfd, pinsn2 >> 32, |
| 15968 | contents + off2); |
| 15969 | if ((pinsn2 & (63ULL << 58)) == 1ULL << 58) |
| 15970 | bfd_put_32 (input_bfd, pinsn2, |
| 15971 | contents + off2 + 4); |
| 15972 | } |
| 15973 | } |
| 15974 | } |
| 15975 | } |
| 15976 | } |
| 15977 | break; |
| 15978 | } |
| 15979 | |
| 15980 | tls_type = 0; |
| 15981 | save_unresolved_reloc = unresolved_reloc; |
| 15982 | switch (r_type) |
| 15983 | { |
| 15984 | default: |
| 15985 | /* xgettext:c-format */ |
| 15986 | _bfd_error_handler (_("%pB: %s unsupported"), |
| 15987 | input_bfd, ppc64_elf_howto_table[r_type]->name); |
| 15988 | |
| 15989 | bfd_set_error (bfd_error_bad_value); |
| 15990 | ret = FALSE; |
| 15991 | goto copy_reloc; |
| 15992 | |
| 15993 | case R_PPC64_NONE: |
| 15994 | case R_PPC64_TLS: |
| 15995 | case R_PPC64_TLSGD: |
| 15996 | case R_PPC64_TLSLD: |
| 15997 | case R_PPC64_TOCSAVE: |
| 15998 | case R_PPC64_GNU_VTINHERIT: |
| 15999 | case R_PPC64_GNU_VTENTRY: |
| 16000 | case R_PPC64_ENTRY: |
| 16001 | case R_PPC64_PCREL_OPT: |
| 16002 | goto copy_reloc; |
| 16003 | |
| 16004 | /* GOT16 relocations. Like an ADDR16 using the symbol's |
| 16005 | address in the GOT as relocation value instead of the |
| 16006 | symbol's value itself. Also, create a GOT entry for the |
| 16007 | symbol and put the symbol value there. */ |
| 16008 | case R_PPC64_GOT_TLSGD16: |
| 16009 | case R_PPC64_GOT_TLSGD16_LO: |
| 16010 | case R_PPC64_GOT_TLSGD16_HI: |
| 16011 | case R_PPC64_GOT_TLSGD16_HA: |
| 16012 | case R_PPC64_GOT_TLSGD34: |
| 16013 | tls_type = TLS_TLS | TLS_GD; |
| 16014 | goto dogot; |
| 16015 | |
| 16016 | case R_PPC64_GOT_TLSLD16: |
| 16017 | case R_PPC64_GOT_TLSLD16_LO: |
| 16018 | case R_PPC64_GOT_TLSLD16_HI: |
| 16019 | case R_PPC64_GOT_TLSLD16_HA: |
| 16020 | case R_PPC64_GOT_TLSLD34: |
| 16021 | tls_type = TLS_TLS | TLS_LD; |
| 16022 | goto dogot; |
| 16023 | |
| 16024 | case R_PPC64_GOT_TPREL16_DS: |
| 16025 | case R_PPC64_GOT_TPREL16_LO_DS: |
| 16026 | case R_PPC64_GOT_TPREL16_HI: |
| 16027 | case R_PPC64_GOT_TPREL16_HA: |
| 16028 | case R_PPC64_GOT_TPREL34: |
| 16029 | tls_type = TLS_TLS | TLS_TPREL; |
| 16030 | goto dogot; |
| 16031 | |
| 16032 | case R_PPC64_GOT_DTPREL16_DS: |
| 16033 | case R_PPC64_GOT_DTPREL16_LO_DS: |
| 16034 | case R_PPC64_GOT_DTPREL16_HI: |
| 16035 | case R_PPC64_GOT_DTPREL16_HA: |
| 16036 | case R_PPC64_GOT_DTPREL34: |
| 16037 | tls_type = TLS_TLS | TLS_DTPREL; |
| 16038 | goto dogot; |
| 16039 | |
| 16040 | case R_PPC64_GOT16: |
| 16041 | case R_PPC64_GOT16_LO: |
| 16042 | case R_PPC64_GOT16_HI: |
| 16043 | case R_PPC64_GOT16_HA: |
| 16044 | case R_PPC64_GOT16_DS: |
| 16045 | case R_PPC64_GOT16_LO_DS: |
| 16046 | case R_PPC64_GOT_PCREL34: |
| 16047 | dogot: |
| 16048 | { |
| 16049 | /* Relocation is to the entry for this symbol in the global |
| 16050 | offset table. */ |
| 16051 | asection *got; |
| 16052 | bfd_vma *offp; |
| 16053 | bfd_vma off; |
| 16054 | unsigned long indx = 0; |
| 16055 | struct got_entry *ent; |
| 16056 | |
| 16057 | if (tls_type == (TLS_TLS | TLS_LD) |
| 16058 | && SYMBOL_REFERENCES_LOCAL (info, &h->elf)) |
| 16059 | ent = ppc64_tlsld_got (input_bfd); |
| 16060 | else |
| 16061 | { |
| 16062 | if (h != NULL) |
| 16063 | { |
| 16064 | if (!htab->elf.dynamic_sections_created |
| 16065 | || h->elf.dynindx == -1 |
| 16066 | || SYMBOL_REFERENCES_LOCAL (info, &h->elf) |
| 16067 | || UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf)) |
| 16068 | /* This is actually a static link, or it is a |
| 16069 | -Bsymbolic link and the symbol is defined |
| 16070 | locally, or the symbol was forced to be local |
| 16071 | because of a version file. */ |
| 16072 | ; |
| 16073 | else |
| 16074 | { |
| 16075 | indx = h->elf.dynindx; |
| 16076 | unresolved_reloc = FALSE; |
| 16077 | } |
| 16078 | ent = h->elf.got.glist; |
| 16079 | } |
| 16080 | else |
| 16081 | { |
| 16082 | if (local_got_ents == NULL) |
| 16083 | abort (); |
| 16084 | ent = local_got_ents[r_symndx]; |
| 16085 | } |
| 16086 | |
| 16087 | for (; ent != NULL; ent = ent->next) |
| 16088 | if (ent->addend == orig_rel.r_addend |
| 16089 | && ent->owner == input_bfd |
| 16090 | && ent->tls_type == tls_type) |
| 16091 | break; |
| 16092 | } |
| 16093 | |
| 16094 | if (ent == NULL) |
| 16095 | abort (); |
| 16096 | if (ent->is_indirect) |
| 16097 | ent = ent->got.ent; |
| 16098 | offp = &ent->got.offset; |
| 16099 | got = ppc64_elf_tdata (ent->owner)->got; |
| 16100 | if (got == NULL) |
| 16101 | abort (); |
| 16102 | |
| 16103 | /* The offset must always be a multiple of 8. We use the |
| 16104 | least significant bit to record whether we have already |
| 16105 | processed this entry. */ |
| 16106 | off = *offp; |
| 16107 | if ((off & 1) != 0) |
| 16108 | off &= ~1; |
| 16109 | else |
| 16110 | { |
| 16111 | /* Generate relocs for the dynamic linker, except in |
| 16112 | the case of TLSLD where we'll use one entry per |
| 16113 | module. */ |
| 16114 | asection *relgot; |
| 16115 | bfd_boolean ifunc; |
| 16116 | |
| 16117 | *offp = off | 1; |
| 16118 | relgot = NULL; |
| 16119 | ifunc = (h != NULL |
| 16120 | ? h->elf.type == STT_GNU_IFUNC |
| 16121 | : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC); |
| 16122 | if (ifunc) |
| 16123 | { |
| 16124 | relgot = htab->elf.irelplt; |
| 16125 | if (indx == 0) |
| 16126 | htab->local_ifunc_resolver = 1; |
| 16127 | else if (is_static_defined (&h->elf)) |
| 16128 | htab->maybe_local_ifunc_resolver = 1; |
| 16129 | } |
| 16130 | else if (indx != 0 |
| 16131 | || (bfd_link_pic (info) |
| 16132 | && (h == NULL |
| 16133 | || !UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf)) |
| 16134 | && !(tls_type != 0 |
| 16135 | && bfd_link_executable (info) |
| 16136 | && SYMBOL_REFERENCES_LOCAL (info, &h->elf)))) |
| 16137 | relgot = ppc64_elf_tdata (ent->owner)->relgot; |
| 16138 | if (relgot != NULL) |
| 16139 | { |
| 16140 | outrel.r_offset = (got->output_section->vma |
| 16141 | + got->output_offset |
| 16142 | + off); |
| 16143 | outrel.r_addend = orig_rel.r_addend; |
| 16144 | if (tls_type & (TLS_LD | TLS_GD)) |
| 16145 | { |
| 16146 | outrel.r_addend = 0; |
| 16147 | outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64); |
| 16148 | if (tls_type == (TLS_TLS | TLS_GD)) |
| 16149 | { |
| 16150 | loc = relgot->contents; |
| 16151 | loc += (relgot->reloc_count++ |
| 16152 | * sizeof (Elf64_External_Rela)); |
| 16153 | bfd_elf64_swap_reloca_out (output_bfd, |
| 16154 | &outrel, loc); |
| 16155 | outrel.r_offset += 8; |
| 16156 | outrel.r_addend = orig_rel.r_addend; |
| 16157 | outrel.r_info |
| 16158 | = ELF64_R_INFO (indx, R_PPC64_DTPREL64); |
| 16159 | } |
| 16160 | } |
| 16161 | else if (tls_type == (TLS_TLS | TLS_DTPREL)) |
| 16162 | outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64); |
| 16163 | else if (tls_type == (TLS_TLS | TLS_TPREL)) |
| 16164 | outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64); |
| 16165 | else if (indx != 0) |
| 16166 | outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT); |
| 16167 | else |
| 16168 | { |
| 16169 | if (ifunc) |
| 16170 | outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE); |
| 16171 | else |
| 16172 | outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); |
| 16173 | |
| 16174 | /* Write the .got section contents for the sake |
| 16175 | of prelink. */ |
| 16176 | loc = got->contents + off; |
| 16177 | bfd_put_64 (output_bfd, outrel.r_addend + relocation, |
| 16178 | loc); |
| 16179 | } |
| 16180 | |
| 16181 | if (indx == 0 && tls_type != (TLS_TLS | TLS_LD)) |
| 16182 | { |
| 16183 | outrel.r_addend += relocation; |
| 16184 | if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL)) |
| 16185 | { |
| 16186 | if (htab->elf.tls_sec == NULL) |
| 16187 | outrel.r_addend = 0; |
| 16188 | else |
| 16189 | outrel.r_addend -= htab->elf.tls_sec->vma; |
| 16190 | } |
| 16191 | } |
| 16192 | loc = relgot->contents; |
| 16193 | loc += (relgot->reloc_count++ |
| 16194 | * sizeof (Elf64_External_Rela)); |
| 16195 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
| 16196 | } |
| 16197 | |
| 16198 | /* Init the .got section contents here if we're not |
| 16199 | emitting a reloc. */ |
| 16200 | else |
| 16201 | { |
| 16202 | relocation += orig_rel.r_addend; |
| 16203 | if (tls_type != 0) |
| 16204 | { |
| 16205 | if (htab->elf.tls_sec == NULL) |
| 16206 | relocation = 0; |
| 16207 | else |
| 16208 | { |
| 16209 | if (tls_type & TLS_LD) |
| 16210 | relocation = 0; |
| 16211 | else |
| 16212 | relocation -= htab->elf.tls_sec->vma + DTP_OFFSET; |
| 16213 | if (tls_type & TLS_TPREL) |
| 16214 | relocation += DTP_OFFSET - TP_OFFSET; |
| 16215 | } |
| 16216 | |
| 16217 | if (tls_type & (TLS_GD | TLS_LD)) |
| 16218 | { |
| 16219 | bfd_put_64 (output_bfd, relocation, |
| 16220 | got->contents + off + 8); |
| 16221 | relocation = 1; |
| 16222 | } |
| 16223 | } |
| 16224 | bfd_put_64 (output_bfd, relocation, |
| 16225 | got->contents + off); |
| 16226 | } |
| 16227 | } |
| 16228 | |
| 16229 | if (off >= (bfd_vma) -2) |
| 16230 | abort (); |
| 16231 | |
| 16232 | relocation = got->output_section->vma + got->output_offset + off; |
| 16233 | addend = 0; |
| 16234 | if (!(r_type == R_PPC64_GOT_PCREL34 |
| 16235 | || r_type == R_PPC64_GOT_TLSGD34 |
| 16236 | || r_type == R_PPC64_GOT_TLSLD34 |
| 16237 | || r_type == R_PPC64_GOT_TPREL34 |
| 16238 | || r_type == R_PPC64_GOT_DTPREL34)) |
| 16239 | addend = -(TOCstart + htab->sec_info[input_section->id].toc_off); |
| 16240 | } |
| 16241 | break; |
| 16242 | |
| 16243 | case R_PPC64_PLT16_HA: |
| 16244 | case R_PPC64_PLT16_HI: |
| 16245 | case R_PPC64_PLT16_LO: |
| 16246 | case R_PPC64_PLT16_LO_DS: |
| 16247 | case R_PPC64_PLT_PCREL34: |
| 16248 | case R_PPC64_PLT_PCREL34_NOTOC: |
| 16249 | case R_PPC64_PLT32: |
| 16250 | case R_PPC64_PLT64: |
| 16251 | case R_PPC64_PLTSEQ: |
| 16252 | case R_PPC64_PLTSEQ_NOTOC: |
| 16253 | case R_PPC64_PLTCALL: |
| 16254 | case R_PPC64_PLTCALL_NOTOC: |
| 16255 | /* Relocation is to the entry for this symbol in the |
| 16256 | procedure linkage table. */ |
| 16257 | unresolved_reloc = TRUE; |
| 16258 | { |
| 16259 | struct plt_entry **plt_list = NULL; |
| 16260 | if (h != NULL) |
| 16261 | plt_list = &h->elf.plt.plist; |
| 16262 | else if (local_got_ents != NULL) |
| 16263 | { |
| 16264 | struct plt_entry **local_plt = (struct plt_entry **) |
| 16265 | (local_got_ents + symtab_hdr->sh_info); |
| 16266 | plt_list = local_plt + r_symndx; |
| 16267 | } |
| 16268 | if (plt_list) |
| 16269 | { |
| 16270 | struct plt_entry *ent; |
| 16271 | |
| 16272 | for (ent = *plt_list; ent != NULL; ent = ent->next) |
| 16273 | if (ent->plt.offset != (bfd_vma) -1 |
| 16274 | && ent->addend == orig_rel.r_addend) |
| 16275 | { |
| 16276 | asection *plt; |
| 16277 | bfd_vma got; |
| 16278 | |
| 16279 | plt = htab->elf.splt; |
| 16280 | if (!htab->elf.dynamic_sections_created |
| 16281 | || h == NULL |
| 16282 | || h->elf.dynindx == -1) |
| 16283 | { |
| 16284 | if (h != NULL |
| 16285 | ? h->elf.type == STT_GNU_IFUNC |
| 16286 | : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
| 16287 | plt = htab->elf.iplt; |
| 16288 | else |
| 16289 | plt = htab->pltlocal; |
| 16290 | } |
| 16291 | relocation = (plt->output_section->vma |
| 16292 | + plt->output_offset |
| 16293 | + ent->plt.offset); |
| 16294 | if (r_type == R_PPC64_PLT16_HA |
| 16295 | || r_type == R_PPC64_PLT16_HI |
| 16296 | || r_type == R_PPC64_PLT16_LO |
| 16297 | || r_type == R_PPC64_PLT16_LO_DS) |
| 16298 | { |
| 16299 | got = (elf_gp (output_bfd) |
| 16300 | + htab->sec_info[input_section->id].toc_off); |
| 16301 | relocation -= got; |
| 16302 | } |
| 16303 | addend = 0; |
| 16304 | unresolved_reloc = FALSE; |
| 16305 | break; |
| 16306 | } |
| 16307 | } |
| 16308 | } |
| 16309 | break; |
| 16310 | |
| 16311 | case R_PPC64_TOC: |
| 16312 | /* Relocation value is TOC base. */ |
| 16313 | relocation = TOCstart; |
| 16314 | if (r_symndx == STN_UNDEF) |
| 16315 | relocation += htab->sec_info[input_section->id].toc_off; |
| 16316 | else if (unresolved_reloc) |
| 16317 | ; |
| 16318 | else if (sec != NULL && sec->id < htab->sec_info_arr_size) |
| 16319 | relocation += htab->sec_info[sec->id].toc_off; |
| 16320 | else |
| 16321 | unresolved_reloc = TRUE; |
| 16322 | goto dodyn; |
| 16323 | |
| 16324 | /* TOC16 relocs. We want the offset relative to the TOC base, |
| 16325 | which is the address of the start of the TOC plus 0x8000. |
| 16326 | The TOC consists of sections .got, .toc, .tocbss, and .plt, |
| 16327 | in this order. */ |
| 16328 | case R_PPC64_TOC16: |
| 16329 | case R_PPC64_TOC16_LO: |
| 16330 | case R_PPC64_TOC16_HI: |
| 16331 | case R_PPC64_TOC16_DS: |
| 16332 | case R_PPC64_TOC16_LO_DS: |
| 16333 | case R_PPC64_TOC16_HA: |
| 16334 | addend -= TOCstart + htab->sec_info[input_section->id].toc_off; |
| 16335 | if (h != NULL) |
| 16336 | goto dodyn; |
| 16337 | break; |
| 16338 | |
| 16339 | /* Relocate against the beginning of the section. */ |
| 16340 | case R_PPC64_SECTOFF: |
| 16341 | case R_PPC64_SECTOFF_LO: |
| 16342 | case R_PPC64_SECTOFF_HI: |
| 16343 | case R_PPC64_SECTOFF_DS: |
| 16344 | case R_PPC64_SECTOFF_LO_DS: |
| 16345 | case R_PPC64_SECTOFF_HA: |
| 16346 | if (sec != NULL) |
| 16347 | addend -= sec->output_section->vma; |
| 16348 | break; |
| 16349 | |
| 16350 | case R_PPC64_REL16: |
| 16351 | case R_PPC64_REL16_LO: |
| 16352 | case R_PPC64_REL16_HI: |
| 16353 | case R_PPC64_REL16_HA: |
| 16354 | case R_PPC64_REL16_HIGH: |
| 16355 | case R_PPC64_REL16_HIGHA: |
| 16356 | case R_PPC64_REL16_HIGHER: |
| 16357 | case R_PPC64_REL16_HIGHERA: |
| 16358 | case R_PPC64_REL16_HIGHEST: |
| 16359 | case R_PPC64_REL16_HIGHESTA: |
| 16360 | case R_PPC64_REL16_HIGHER34: |
| 16361 | case R_PPC64_REL16_HIGHERA34: |
| 16362 | case R_PPC64_REL16_HIGHEST34: |
| 16363 | case R_PPC64_REL16_HIGHESTA34: |
| 16364 | case R_PPC64_REL16DX_HA: |
| 16365 | case R_PPC64_REL14: |
| 16366 | case R_PPC64_REL14_BRNTAKEN: |
| 16367 | case R_PPC64_REL14_BRTAKEN: |
| 16368 | case R_PPC64_REL24: |
| 16369 | case R_PPC64_REL24_NOTOC: |
| 16370 | case R_PPC64_PCREL34: |
| 16371 | case R_PPC64_PCREL28: |
| 16372 | break; |
| 16373 | |
| 16374 | case R_PPC64_TPREL16: |
| 16375 | case R_PPC64_TPREL16_LO: |
| 16376 | case R_PPC64_TPREL16_HI: |
| 16377 | case R_PPC64_TPREL16_HA: |
| 16378 | case R_PPC64_TPREL16_DS: |
| 16379 | case R_PPC64_TPREL16_LO_DS: |
| 16380 | case R_PPC64_TPREL16_HIGH: |
| 16381 | case R_PPC64_TPREL16_HIGHA: |
| 16382 | case R_PPC64_TPREL16_HIGHER: |
| 16383 | case R_PPC64_TPREL16_HIGHERA: |
| 16384 | case R_PPC64_TPREL16_HIGHEST: |
| 16385 | case R_PPC64_TPREL16_HIGHESTA: |
| 16386 | case R_PPC64_TPREL34: |
| 16387 | if (h != NULL |
| 16388 | && h->elf.root.type == bfd_link_hash_undefweak |
| 16389 | && h->elf.dynindx == -1) |
| 16390 | { |
| 16391 | /* Make this relocation against an undefined weak symbol |
| 16392 | resolve to zero. This is really just a tweak, since |
| 16393 | code using weak externs ought to check that they are |
| 16394 | defined before using them. */ |
| 16395 | bfd_byte *p = contents + rel->r_offset - d_offset; |
| 16396 | |
| 16397 | insn = bfd_get_32 (input_bfd, p); |
| 16398 | insn = _bfd_elf_ppc_at_tprel_transform (insn, 13); |
| 16399 | if (insn != 0) |
| 16400 | bfd_put_32 (input_bfd, insn, p); |
| 16401 | break; |
| 16402 | } |
| 16403 | if (htab->elf.tls_sec != NULL) |
| 16404 | addend -= htab->elf.tls_sec->vma + TP_OFFSET; |
| 16405 | /* The TPREL16 relocs shouldn't really be used in shared |
| 16406 | libs or with non-local symbols as that will result in |
| 16407 | DT_TEXTREL being set, but support them anyway. */ |
| 16408 | goto dodyn; |
| 16409 | |
| 16410 | case R_PPC64_DTPREL16: |
| 16411 | case R_PPC64_DTPREL16_LO: |
| 16412 | case R_PPC64_DTPREL16_HI: |
| 16413 | case R_PPC64_DTPREL16_HA: |
| 16414 | case R_PPC64_DTPREL16_DS: |
| 16415 | case R_PPC64_DTPREL16_LO_DS: |
| 16416 | case R_PPC64_DTPREL16_HIGH: |
| 16417 | case R_PPC64_DTPREL16_HIGHA: |
| 16418 | case R_PPC64_DTPREL16_HIGHER: |
| 16419 | case R_PPC64_DTPREL16_HIGHERA: |
| 16420 | case R_PPC64_DTPREL16_HIGHEST: |
| 16421 | case R_PPC64_DTPREL16_HIGHESTA: |
| 16422 | case R_PPC64_DTPREL34: |
| 16423 | if (htab->elf.tls_sec != NULL) |
| 16424 | addend -= htab->elf.tls_sec->vma + DTP_OFFSET; |
| 16425 | break; |
| 16426 | |
| 16427 | case R_PPC64_ADDR64_LOCAL: |
| 16428 | addend += PPC64_LOCAL_ENTRY_OFFSET (h != NULL |
| 16429 | ? h->elf.other |
| 16430 | : sym->st_other); |
| 16431 | break; |
| 16432 | |
| 16433 | case R_PPC64_DTPMOD64: |
| 16434 | relocation = 1; |
| 16435 | addend = 0; |
| 16436 | goto dodyn; |
| 16437 | |
| 16438 | case R_PPC64_TPREL64: |
| 16439 | if (htab->elf.tls_sec != NULL) |
| 16440 | addend -= htab->elf.tls_sec->vma + TP_OFFSET; |
| 16441 | goto dodyn; |
| 16442 | |
| 16443 | case R_PPC64_DTPREL64: |
| 16444 | if (htab->elf.tls_sec != NULL) |
| 16445 | addend -= htab->elf.tls_sec->vma + DTP_OFFSET; |
| 16446 | /* Fall through. */ |
| 16447 | |
| 16448 | /* Relocations that may need to be propagated if this is a |
| 16449 | dynamic object. */ |
| 16450 | case R_PPC64_REL30: |
| 16451 | case R_PPC64_REL32: |
| 16452 | case R_PPC64_REL64: |
| 16453 | case R_PPC64_ADDR14: |
| 16454 | case R_PPC64_ADDR14_BRNTAKEN: |
| 16455 | case R_PPC64_ADDR14_BRTAKEN: |
| 16456 | case R_PPC64_ADDR16: |
| 16457 | case R_PPC64_ADDR16_DS: |
| 16458 | case R_PPC64_ADDR16_HA: |
| 16459 | case R_PPC64_ADDR16_HI: |
| 16460 | case R_PPC64_ADDR16_HIGH: |
| 16461 | case R_PPC64_ADDR16_HIGHA: |
| 16462 | case R_PPC64_ADDR16_HIGHER: |
| 16463 | case R_PPC64_ADDR16_HIGHERA: |
| 16464 | case R_PPC64_ADDR16_HIGHEST: |
| 16465 | case R_PPC64_ADDR16_HIGHESTA: |
| 16466 | case R_PPC64_ADDR16_LO: |
| 16467 | case R_PPC64_ADDR16_LO_DS: |
| 16468 | case R_PPC64_ADDR16_HIGHER34: |
| 16469 | case R_PPC64_ADDR16_HIGHERA34: |
| 16470 | case R_PPC64_ADDR16_HIGHEST34: |
| 16471 | case R_PPC64_ADDR16_HIGHESTA34: |
| 16472 | case R_PPC64_ADDR24: |
| 16473 | case R_PPC64_ADDR32: |
| 16474 | case R_PPC64_ADDR64: |
| 16475 | case R_PPC64_UADDR16: |
| 16476 | case R_PPC64_UADDR32: |
| 16477 | case R_PPC64_UADDR64: |
| 16478 | case R_PPC64_D34: |
| 16479 | case R_PPC64_D34_LO: |
| 16480 | case R_PPC64_D34_HI30: |
| 16481 | case R_PPC64_D34_HA30: |
| 16482 | case R_PPC64_D28: |
| 16483 | dodyn: |
| 16484 | if ((input_section->flags & SEC_ALLOC) == 0) |
| 16485 | break; |
| 16486 | |
| 16487 | if (NO_OPD_RELOCS && is_opd) |
| 16488 | break; |
| 16489 | |
| 16490 | if (bfd_link_pic (info) |
| 16491 | ? ((h == NULL |
| 16492 | || h->elf.dyn_relocs != NULL) |
| 16493 | && ((h != NULL && pc_dynrelocs (h)) |
| 16494 | || must_be_dyn_reloc (info, r_type))) |
| 16495 | : (h != NULL |
| 16496 | ? h->elf.dyn_relocs != NULL |
| 16497 | : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)) |
| 16498 | { |
| 16499 | bfd_boolean skip, relocate; |
| 16500 | asection *sreloc; |
| 16501 | bfd_vma out_off; |
| 16502 | long indx = 0; |
| 16503 | |
| 16504 | /* When generating a dynamic object, these relocations |
| 16505 | are copied into the output file to be resolved at run |
| 16506 | time. */ |
| 16507 | |
| 16508 | skip = FALSE; |
| 16509 | relocate = FALSE; |
| 16510 | |
| 16511 | out_off = _bfd_elf_section_offset (output_bfd, info, |
| 16512 | input_section, rel->r_offset); |
| 16513 | if (out_off == (bfd_vma) -1) |
| 16514 | skip = TRUE; |
| 16515 | else if (out_off == (bfd_vma) -2) |
| 16516 | skip = TRUE, relocate = TRUE; |
| 16517 | out_off += (input_section->output_section->vma |
| 16518 | + input_section->output_offset); |
| 16519 | outrel.r_offset = out_off; |
| 16520 | outrel.r_addend = rel->r_addend; |
| 16521 | |
| 16522 | /* Optimize unaligned reloc use. */ |
| 16523 | if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0) |
| 16524 | || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0)) |
| 16525 | r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64; |
| 16526 | else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0) |
| 16527 | || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0)) |
| 16528 | r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32; |
| 16529 | else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0) |
| 16530 | || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0)) |
| 16531 | r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16; |
| 16532 | |
| 16533 | if (skip) |
| 16534 | memset (&outrel, 0, sizeof outrel); |
| 16535 | else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf) |
| 16536 | && !is_opd |
| 16537 | && r_type != R_PPC64_TOC) |
| 16538 | { |
| 16539 | indx = h->elf.dynindx; |
| 16540 | BFD_ASSERT (indx != -1); |
| 16541 | outrel.r_info = ELF64_R_INFO (indx, r_type); |
| 16542 | } |
| 16543 | else |
| 16544 | { |
| 16545 | /* This symbol is local, or marked to become local, |
| 16546 | or this is an opd section reloc which must point |
| 16547 | at a local function. */ |
| 16548 | outrel.r_addend += relocation; |
| 16549 | if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC) |
| 16550 | { |
| 16551 | if (is_opd && h != NULL) |
| 16552 | { |
| 16553 | /* Lie about opd entries. This case occurs |
| 16554 | when building shared libraries and we |
| 16555 | reference a function in another shared |
| 16556 | lib. The same thing happens for a weak |
| 16557 | definition in an application that's |
| 16558 | overridden by a strong definition in a |
| 16559 | shared lib. (I believe this is a generic |
| 16560 | bug in binutils handling of weak syms.) |
| 16561 | In these cases we won't use the opd |
| 16562 | entry in this lib. */ |
| 16563 | unresolved_reloc = FALSE; |
| 16564 | } |
| 16565 | if (!is_opd |
| 16566 | && r_type == R_PPC64_ADDR64 |
| 16567 | && (h != NULL |
| 16568 | ? h->elf.type == STT_GNU_IFUNC |
| 16569 | : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)) |
| 16570 | outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE); |
| 16571 | else |
| 16572 | { |
| 16573 | outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); |
| 16574 | |
| 16575 | /* We need to relocate .opd contents for ld.so. |
| 16576 | Prelink also wants simple and consistent rules |
| 16577 | for relocs. This make all RELATIVE relocs have |
| 16578 | *r_offset equal to r_addend. */ |
| 16579 | relocate = TRUE; |
| 16580 | } |
| 16581 | } |
| 16582 | else |
| 16583 | { |
| 16584 | if (h != NULL |
| 16585 | ? h->elf.type == STT_GNU_IFUNC |
| 16586 | : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
| 16587 | { |
| 16588 | info->callbacks->einfo |
| 16589 | /* xgettext:c-format */ |
| 16590 | (_("%H: %s for indirect " |
| 16591 | "function `%pT' unsupported\n"), |
| 16592 | input_bfd, input_section, rel->r_offset, |
| 16593 | ppc64_elf_howto_table[r_type]->name, |
| 16594 | sym_name); |
| 16595 | ret = FALSE; |
| 16596 | } |
| 16597 | else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec)) |
| 16598 | ; |
| 16599 | else if (sec == NULL || sec->owner == NULL) |
| 16600 | { |
| 16601 | bfd_set_error (bfd_error_bad_value); |
| 16602 | return FALSE; |
| 16603 | } |
| 16604 | else |
| 16605 | { |
| 16606 | asection *osec = sec->output_section; |
| 16607 | |
| 16608 | if ((osec->flags & SEC_THREAD_LOCAL) != 0) |
| 16609 | { |
| 16610 | /* TLS symbol values are relative to the |
| 16611 | TLS segment. Dynamic relocations for |
| 16612 | local TLS symbols therefore can't be |
| 16613 | reduced to a relocation against their |
| 16614 | section symbol because it holds the |
| 16615 | address of the section, not a value |
| 16616 | relative to the TLS segment. We could |
| 16617 | change the .tdata dynamic section symbol |
| 16618 | to be zero value but STN_UNDEF works |
| 16619 | and is used elsewhere, eg. for TPREL64 |
| 16620 | GOT relocs against local TLS symbols. */ |
| 16621 | osec = htab->elf.tls_sec; |
| 16622 | indx = 0; |
| 16623 | } |
| 16624 | else |
| 16625 | { |
| 16626 | indx = elf_section_data (osec)->dynindx; |
| 16627 | if (indx == 0) |
| 16628 | { |
| 16629 | if ((osec->flags & SEC_READONLY) == 0 |
| 16630 | && htab->elf.data_index_section != NULL) |
| 16631 | osec = htab->elf.data_index_section; |
| 16632 | else |
| 16633 | osec = htab->elf.text_index_section; |
| 16634 | indx = elf_section_data (osec)->dynindx; |
| 16635 | } |
| 16636 | BFD_ASSERT (indx != 0); |
| 16637 | } |
| 16638 | |
| 16639 | /* We are turning this relocation into one |
| 16640 | against a section symbol, so subtract out |
| 16641 | the output section's address but not the |
| 16642 | offset of the input section in the output |
| 16643 | section. */ |
| 16644 | outrel.r_addend -= osec->vma; |
| 16645 | } |
| 16646 | |
| 16647 | outrel.r_info = ELF64_R_INFO (indx, r_type); |
| 16648 | } |
| 16649 | } |
| 16650 | |
| 16651 | sreloc = elf_section_data (input_section)->sreloc; |
| 16652 | if (h != NULL |
| 16653 | ? h->elf.type == STT_GNU_IFUNC |
| 16654 | : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
| 16655 | { |
| 16656 | sreloc = htab->elf.irelplt; |
| 16657 | if (indx == 0) |
| 16658 | htab->local_ifunc_resolver = 1; |
| 16659 | else if (is_static_defined (&h->elf)) |
| 16660 | htab->maybe_local_ifunc_resolver = 1; |
| 16661 | } |
| 16662 | if (sreloc == NULL) |
| 16663 | abort (); |
| 16664 | |
| 16665 | if (sreloc->reloc_count * sizeof (Elf64_External_Rela) |
| 16666 | >= sreloc->size) |
| 16667 | abort (); |
| 16668 | loc = sreloc->contents; |
| 16669 | loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); |
| 16670 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
| 16671 | |
| 16672 | if (!warned_dynamic |
| 16673 | && !ppc64_glibc_dynamic_reloc (ELF64_R_TYPE (outrel.r_info))) |
| 16674 | { |
| 16675 | info->callbacks->einfo |
| 16676 | /* xgettext:c-format */ |
| 16677 | (_("%X%P: %pB: %s against %pT " |
| 16678 | "is not supported by glibc as a dynamic relocation\n"), |
| 16679 | input_bfd, |
| 16680 | ppc64_elf_howto_table[ELF64_R_TYPE (outrel.r_info)]->name, |
| 16681 | sym_name); |
| 16682 | warned_dynamic = TRUE; |
| 16683 | } |
| 16684 | |
| 16685 | /* If this reloc is against an external symbol, it will |
| 16686 | be computed at runtime, so there's no need to do |
| 16687 | anything now. However, for the sake of prelink ensure |
| 16688 | that the section contents are a known value. */ |
| 16689 | if (!relocate) |
| 16690 | { |
| 16691 | unresolved_reloc = FALSE; |
| 16692 | /* The value chosen here is quite arbitrary as ld.so |
| 16693 | ignores section contents except for the special |
| 16694 | case of .opd where the contents might be accessed |
| 16695 | before relocation. Choose zero, as that won't |
| 16696 | cause reloc overflow. */ |
| 16697 | relocation = 0; |
| 16698 | addend = 0; |
| 16699 | /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs |
| 16700 | to improve backward compatibility with older |
| 16701 | versions of ld. */ |
| 16702 | if (r_type == R_PPC64_ADDR64) |
| 16703 | addend = outrel.r_addend; |
| 16704 | /* Adjust pc_relative relocs to have zero in *r_offset. */ |
| 16705 | else if (ppc64_elf_howto_table[r_type]->pc_relative) |
| 16706 | addend = outrel.r_offset; |
| 16707 | } |
| 16708 | } |
| 16709 | break; |
| 16710 | |
| 16711 | case R_PPC64_COPY: |
| 16712 | case R_PPC64_GLOB_DAT: |
| 16713 | case R_PPC64_JMP_SLOT: |
| 16714 | case R_PPC64_JMP_IREL: |
| 16715 | case R_PPC64_RELATIVE: |
| 16716 | /* We shouldn't ever see these dynamic relocs in relocatable |
| 16717 | files. */ |
| 16718 | /* Fall through. */ |
| 16719 | |
| 16720 | case R_PPC64_PLTGOT16: |
| 16721 | case R_PPC64_PLTGOT16_DS: |
| 16722 | case R_PPC64_PLTGOT16_HA: |
| 16723 | case R_PPC64_PLTGOT16_HI: |
| 16724 | case R_PPC64_PLTGOT16_LO: |
| 16725 | case R_PPC64_PLTGOT16_LO_DS: |
| 16726 | case R_PPC64_PLTREL32: |
| 16727 | case R_PPC64_PLTREL64: |
| 16728 | /* These ones haven't been implemented yet. */ |
| 16729 | |
| 16730 | info->callbacks->einfo |
| 16731 | /* xgettext:c-format */ |
| 16732 | (_("%P: %pB: %s is not supported for `%pT'\n"), |
| 16733 | input_bfd, |
| 16734 | ppc64_elf_howto_table[r_type]->name, sym_name); |
| 16735 | |
| 16736 | bfd_set_error (bfd_error_invalid_operation); |
| 16737 | ret = FALSE; |
| 16738 | goto copy_reloc; |
| 16739 | } |
| 16740 | |
| 16741 | /* Multi-instruction sequences that access the TOC can be |
| 16742 | optimized, eg. addis ra,r2,0; addi rb,ra,x; |
| 16743 | to nop; addi rb,r2,x; */ |
| 16744 | switch (r_type) |
| 16745 | { |
| 16746 | default: |
| 16747 | break; |
| 16748 | |
| 16749 | case R_PPC64_GOT_TLSLD16_HI: |
| 16750 | case R_PPC64_GOT_TLSGD16_HI: |
| 16751 | case R_PPC64_GOT_TPREL16_HI: |
| 16752 | case R_PPC64_GOT_DTPREL16_HI: |
| 16753 | case R_PPC64_GOT16_HI: |
| 16754 | case R_PPC64_TOC16_HI: |
| 16755 | /* These relocs would only be useful if building up an |
| 16756 | offset to later add to r2, perhaps in an indexed |
| 16757 | addressing mode instruction. Don't try to optimize. |
| 16758 | Unfortunately, the possibility of someone building up an |
| 16759 | offset like this or even with the HA relocs, means that |
| 16760 | we need to check the high insn when optimizing the low |
| 16761 | insn. */ |
| 16762 | break; |
| 16763 | |
| 16764 | case R_PPC64_PLTCALL_NOTOC: |
| 16765 | if (!unresolved_reloc) |
| 16766 | htab->notoc_plt = 1; |
| 16767 | /* Fall through. */ |
| 16768 | case R_PPC64_PLTCALL: |
| 16769 | if (unresolved_reloc) |
| 16770 | { |
| 16771 | /* No plt entry. Make this into a direct call. */ |
| 16772 | bfd_byte *p = contents + rel->r_offset; |
| 16773 | insn = bfd_get_32 (input_bfd, p); |
| 16774 | insn &= 1; |
| 16775 | bfd_put_32 (input_bfd, B_DOT | insn, p); |
| 16776 | if (r_type == R_PPC64_PLTCALL) |
| 16777 | bfd_put_32 (input_bfd, NOP, p + 4); |
| 16778 | unresolved_reloc = save_unresolved_reloc; |
| 16779 | r_type = R_PPC64_REL24; |
| 16780 | } |
| 16781 | break; |
| 16782 | |
| 16783 | case R_PPC64_PLTSEQ_NOTOC: |
| 16784 | case R_PPC64_PLTSEQ: |
| 16785 | if (unresolved_reloc) |
| 16786 | { |
| 16787 | unresolved_reloc = FALSE; |
| 16788 | goto nop_it; |
| 16789 | } |
| 16790 | break; |
| 16791 | |
| 16792 | case R_PPC64_PLT_PCREL34_NOTOC: |
| 16793 | if (!unresolved_reloc) |
| 16794 | htab->notoc_plt = 1; |
| 16795 | /* Fall through. */ |
| 16796 | case R_PPC64_PLT_PCREL34: |
| 16797 | if (unresolved_reloc) |
| 16798 | { |
| 16799 | bfd_byte *p = contents + rel->r_offset; |
| 16800 | bfd_put_32 (input_bfd, PNOP >> 32, p); |
| 16801 | bfd_put_32 (input_bfd, PNOP, p + 4); |
| 16802 | unresolved_reloc = FALSE; |
| 16803 | goto copy_reloc; |
| 16804 | } |
| 16805 | break; |
| 16806 | |
| 16807 | case R_PPC64_PLT16_HA: |
| 16808 | if (unresolved_reloc) |
| 16809 | { |
| 16810 | unresolved_reloc = FALSE; |
| 16811 | goto nop_it; |
| 16812 | } |
| 16813 | /* Fall through. */ |
| 16814 | case R_PPC64_GOT_TLSLD16_HA: |
| 16815 | case R_PPC64_GOT_TLSGD16_HA: |
| 16816 | case R_PPC64_GOT_TPREL16_HA: |
| 16817 | case R_PPC64_GOT_DTPREL16_HA: |
| 16818 | case R_PPC64_GOT16_HA: |
| 16819 | case R_PPC64_TOC16_HA: |
| 16820 | if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000 |
| 16821 | && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn) |
| 16822 | { |
| 16823 | bfd_byte *p; |
| 16824 | nop_it: |
| 16825 | p = contents + (rel->r_offset & ~3); |
| 16826 | bfd_put_32 (input_bfd, NOP, p); |
| 16827 | goto copy_reloc; |
| 16828 | } |
| 16829 | break; |
| 16830 | |
| 16831 | case R_PPC64_PLT16_LO: |
| 16832 | case R_PPC64_PLT16_LO_DS: |
| 16833 | if (unresolved_reloc) |
| 16834 | { |
| 16835 | unresolved_reloc = FALSE; |
| 16836 | goto nop_it; |
| 16837 | } |
| 16838 | /* Fall through. */ |
| 16839 | case R_PPC64_GOT_TLSLD16_LO: |
| 16840 | case R_PPC64_GOT_TLSGD16_LO: |
| 16841 | case R_PPC64_GOT_TPREL16_LO_DS: |
| 16842 | case R_PPC64_GOT_DTPREL16_LO_DS: |
| 16843 | case R_PPC64_GOT16_LO: |
| 16844 | case R_PPC64_GOT16_LO_DS: |
| 16845 | case R_PPC64_TOC16_LO: |
| 16846 | case R_PPC64_TOC16_LO_DS: |
| 16847 | if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000 |
| 16848 | && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn) |
| 16849 | { |
| 16850 | bfd_byte *p = contents + (rel->r_offset & ~3); |
| 16851 | insn = bfd_get_32 (input_bfd, p); |
| 16852 | if ((insn & (0x3fu << 26)) == 12u << 26 /* addic */) |
| 16853 | { |
| 16854 | /* Transform addic to addi when we change reg. */ |
| 16855 | insn &= ~((0x3fu << 26) | (0x1f << 16)); |
| 16856 | insn |= (14u << 26) | (2 << 16); |
| 16857 | } |
| 16858 | else |
| 16859 | { |
| 16860 | insn &= ~(0x1f << 16); |
| 16861 | insn |= 2 << 16; |
| 16862 | } |
| 16863 | bfd_put_32 (input_bfd, insn, p); |
| 16864 | } |
| 16865 | break; |
| 16866 | |
| 16867 | case R_PPC64_TPREL16_HA: |
| 16868 | if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000) |
| 16869 | { |
| 16870 | bfd_byte *p = contents + (rel->r_offset & ~3); |
| 16871 | insn = bfd_get_32 (input_bfd, p); |
| 16872 | if ((insn & ((0x3fu << 26) | 0x1f << 16)) |
| 16873 | != ((15u << 26) | (13 << 16)) /* addis rt,13,imm */) |
| 16874 | /* xgettext:c-format */ |
| 16875 | info->callbacks->minfo |
| 16876 | (_("%H: warning: %s unexpected insn %#x.\n"), |
| 16877 | input_bfd, input_section, rel->r_offset, |
| 16878 | ppc64_elf_howto_table[r_type]->name, insn); |
| 16879 | else |
| 16880 | { |
| 16881 | bfd_put_32 (input_bfd, NOP, p); |
| 16882 | goto copy_reloc; |
| 16883 | } |
| 16884 | } |
| 16885 | break; |
| 16886 | |
| 16887 | case R_PPC64_TPREL16_LO: |
| 16888 | case R_PPC64_TPREL16_LO_DS: |
| 16889 | if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000) |
| 16890 | { |
| 16891 | bfd_byte *p = contents + (rel->r_offset & ~3); |
| 16892 | insn = bfd_get_32 (input_bfd, p); |
| 16893 | insn &= ~(0x1f << 16); |
| 16894 | insn |= 13 << 16; |
| 16895 | bfd_put_32 (input_bfd, insn, p); |
| 16896 | } |
| 16897 | break; |
| 16898 | } |
| 16899 | |
| 16900 | /* Do any further special processing. */ |
| 16901 | switch (r_type) |
| 16902 | { |
| 16903 | default: |
| 16904 | break; |
| 16905 | |
| 16906 | case R_PPC64_REL16_HA: |
| 16907 | case R_PPC64_REL16_HIGHA: |
| 16908 | case R_PPC64_REL16_HIGHERA: |
| 16909 | case R_PPC64_REL16_HIGHESTA: |
| 16910 | case R_PPC64_REL16DX_HA: |
| 16911 | case R_PPC64_ADDR16_HA: |
| 16912 | case R_PPC64_ADDR16_HIGHA: |
| 16913 | case R_PPC64_ADDR16_HIGHERA: |
| 16914 | case R_PPC64_ADDR16_HIGHESTA: |
| 16915 | case R_PPC64_TOC16_HA: |
| 16916 | case R_PPC64_SECTOFF_HA: |
| 16917 | case R_PPC64_TPREL16_HA: |
| 16918 | case R_PPC64_TPREL16_HIGHA: |
| 16919 | case R_PPC64_TPREL16_HIGHERA: |
| 16920 | case R_PPC64_TPREL16_HIGHESTA: |
| 16921 | case R_PPC64_DTPREL16_HA: |
| 16922 | case R_PPC64_DTPREL16_HIGHA: |
| 16923 | case R_PPC64_DTPREL16_HIGHERA: |
| 16924 | case R_PPC64_DTPREL16_HIGHESTA: |
| 16925 | /* It's just possible that this symbol is a weak symbol |
| 16926 | that's not actually defined anywhere. In that case, |
| 16927 | 'sec' would be NULL, and we should leave the symbol |
| 16928 | alone (it will be set to zero elsewhere in the link). */ |
| 16929 | if (sec == NULL) |
| 16930 | break; |
| 16931 | /* Fall through. */ |
| 16932 | |
| 16933 | case R_PPC64_GOT16_HA: |
| 16934 | case R_PPC64_PLTGOT16_HA: |
| 16935 | case R_PPC64_PLT16_HA: |
| 16936 | case R_PPC64_GOT_TLSGD16_HA: |
| 16937 | case R_PPC64_GOT_TLSLD16_HA: |
| 16938 | case R_PPC64_GOT_TPREL16_HA: |
| 16939 | case R_PPC64_GOT_DTPREL16_HA: |
| 16940 | /* Add 0x10000 if sign bit in 0:15 is set. |
| 16941 | Bits 0:15 are not used. */ |
| 16942 | addend += 0x8000; |
| 16943 | break; |
| 16944 | |
| 16945 | case R_PPC64_D34_HA30: |
| 16946 | case R_PPC64_ADDR16_HIGHERA34: |
| 16947 | case R_PPC64_ADDR16_HIGHESTA34: |
| 16948 | case R_PPC64_REL16_HIGHERA34: |
| 16949 | case R_PPC64_REL16_HIGHESTA34: |
| 16950 | if (sec != NULL) |
| 16951 | addend += 1ULL << 33; |
| 16952 | break; |
| 16953 | |
| 16954 | case R_PPC64_ADDR16_DS: |
| 16955 | case R_PPC64_ADDR16_LO_DS: |
| 16956 | case R_PPC64_GOT16_DS: |
| 16957 | case R_PPC64_GOT16_LO_DS: |
| 16958 | case R_PPC64_PLT16_LO_DS: |
| 16959 | case R_PPC64_SECTOFF_DS: |
| 16960 | case R_PPC64_SECTOFF_LO_DS: |
| 16961 | case R_PPC64_TOC16_DS: |
| 16962 | case R_PPC64_TOC16_LO_DS: |
| 16963 | case R_PPC64_PLTGOT16_DS: |
| 16964 | case R_PPC64_PLTGOT16_LO_DS: |
| 16965 | case R_PPC64_GOT_TPREL16_DS: |
| 16966 | case R_PPC64_GOT_TPREL16_LO_DS: |
| 16967 | case R_PPC64_GOT_DTPREL16_DS: |
| 16968 | case R_PPC64_GOT_DTPREL16_LO_DS: |
| 16969 | case R_PPC64_TPREL16_DS: |
| 16970 | case R_PPC64_TPREL16_LO_DS: |
| 16971 | case R_PPC64_DTPREL16_DS: |
| 16972 | case R_PPC64_DTPREL16_LO_DS: |
| 16973 | insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3)); |
| 16974 | mask = 3; |
| 16975 | /* If this reloc is against an lq, lxv, or stxv insn, then |
| 16976 | the value must be a multiple of 16. This is somewhat of |
| 16977 | a hack, but the "correct" way to do this by defining _DQ |
| 16978 | forms of all the _DS relocs bloats all reloc switches in |
| 16979 | this file. It doesn't make much sense to use these |
| 16980 | relocs in data, so testing the insn should be safe. */ |
| 16981 | if ((insn & (0x3fu << 26)) == (56u << 26) |
| 16982 | || ((insn & (0x3fu << 26)) == (61u << 26) && (insn & 3) == 1)) |
| 16983 | mask = 15; |
| 16984 | relocation += addend; |
| 16985 | addend = insn & (mask ^ 3); |
| 16986 | if ((relocation & mask) != 0) |
| 16987 | { |
| 16988 | relocation ^= relocation & mask; |
| 16989 | info->callbacks->einfo |
| 16990 | /* xgettext:c-format */ |
| 16991 | (_("%H: error: %s not a multiple of %u\n"), |
| 16992 | input_bfd, input_section, rel->r_offset, |
| 16993 | ppc64_elf_howto_table[r_type]->name, |
| 16994 | mask + 1); |
| 16995 | bfd_set_error (bfd_error_bad_value); |
| 16996 | ret = FALSE; |
| 16997 | goto copy_reloc; |
| 16998 | } |
| 16999 | break; |
| 17000 | } |
| 17001 | |
| 17002 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
| 17003 | because such sections are not SEC_ALLOC and thus ld.so will |
| 17004 | not process them. */ |
| 17005 | howto = ppc64_elf_howto_table[(int) r_type]; |
| 17006 | if (unresolved_reloc |
| 17007 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
| 17008 | && h->elf.def_dynamic) |
| 17009 | && _bfd_elf_section_offset (output_bfd, info, input_section, |
| 17010 | rel->r_offset) != (bfd_vma) -1) |
| 17011 | { |
| 17012 | info->callbacks->einfo |
| 17013 | /* xgettext:c-format */ |
| 17014 | (_("%H: unresolvable %s against `%pT'\n"), |
| 17015 | input_bfd, input_section, rel->r_offset, |
| 17016 | howto->name, |
| 17017 | h->elf.root.root.string); |
| 17018 | ret = FALSE; |
| 17019 | } |
| 17020 | |
| 17021 | /* 16-bit fields in insns mostly have signed values, but a |
| 17022 | few insns have 16-bit unsigned values. Really, we should |
| 17023 | have different reloc types. */ |
| 17024 | if (howto->complain_on_overflow != complain_overflow_dont |
| 17025 | && howto->dst_mask == 0xffff |
| 17026 | && (input_section->flags & SEC_CODE) != 0) |
| 17027 | { |
| 17028 | enum complain_overflow complain = complain_overflow_signed; |
| 17029 | |
| 17030 | insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3)); |
| 17031 | if ((insn & (0x3fu << 26)) == 10u << 26 /* cmpli */) |
| 17032 | complain = complain_overflow_bitfield; |
| 17033 | else if (howto->rightshift == 0 |
| 17034 | ? ((insn & (0x3fu << 26)) == 28u << 26 /* andi */ |
| 17035 | || (insn & (0x3fu << 26)) == 24u << 26 /* ori */ |
| 17036 | || (insn & (0x3fu << 26)) == 26u << 26 /* xori */) |
| 17037 | : ((insn & (0x3fu << 26)) == 29u << 26 /* andis */ |
| 17038 | || (insn & (0x3fu << 26)) == 25u << 26 /* oris */ |
| 17039 | || (insn & (0x3fu << 26)) == 27u << 26 /* xoris */)) |
| 17040 | complain = complain_overflow_unsigned; |
| 17041 | if (howto->complain_on_overflow != complain) |
| 17042 | { |
| 17043 | alt_howto = *howto; |
| 17044 | alt_howto.complain_on_overflow = complain; |
| 17045 | howto = &alt_howto; |
| 17046 | } |
| 17047 | } |
| 17048 | |
| 17049 | switch (r_type) |
| 17050 | { |
| 17051 | /* Split field relocs aren't handled by _bfd_final_link_relocate. */ |
| 17052 | case R_PPC64_D34: |
| 17053 | case R_PPC64_D34_LO: |
| 17054 | case R_PPC64_D34_HI30: |
| 17055 | case R_PPC64_D34_HA30: |
| 17056 | case R_PPC64_PCREL34: |
| 17057 | case R_PPC64_GOT_PCREL34: |
| 17058 | case R_PPC64_TPREL34: |
| 17059 | case R_PPC64_DTPREL34: |
| 17060 | case R_PPC64_GOT_TLSGD34: |
| 17061 | case R_PPC64_GOT_TLSLD34: |
| 17062 | case R_PPC64_GOT_TPREL34: |
| 17063 | case R_PPC64_GOT_DTPREL34: |
| 17064 | case R_PPC64_PLT_PCREL34: |
| 17065 | case R_PPC64_PLT_PCREL34_NOTOC: |
| 17066 | case R_PPC64_D28: |
| 17067 | case R_PPC64_PCREL28: |
| 17068 | if (rel->r_offset + 8 > input_section->size) |
| 17069 | r = bfd_reloc_outofrange; |
| 17070 | else |
| 17071 | { |
| 17072 | relocation += addend; |
| 17073 | if (howto->pc_relative) |
| 17074 | relocation -= (rel->r_offset |
| 17075 | + input_section->output_offset |
| 17076 | + input_section->output_section->vma); |
| 17077 | relocation >>= howto->rightshift; |
| 17078 | |
| 17079 | pinsn = bfd_get_32 (input_bfd, contents + rel->r_offset); |
| 17080 | pinsn <<= 32; |
| 17081 | pinsn |= bfd_get_32 (input_bfd, contents + rel->r_offset + 4); |
| 17082 | |
| 17083 | pinsn &= ~howto->dst_mask; |
| 17084 | pinsn |= (((relocation << 16) | (relocation & 0xffff)) |
| 17085 | & howto->dst_mask); |
| 17086 | bfd_put_32 (input_bfd, pinsn >> 32, contents + rel->r_offset); |
| 17087 | bfd_put_32 (input_bfd, pinsn, contents + rel->r_offset + 4); |
| 17088 | r = bfd_reloc_ok; |
| 17089 | if (howto->complain_on_overflow == complain_overflow_signed |
| 17090 | && (relocation + (1ULL << (howto->bitsize - 1)) |
| 17091 | >= 1ULL << howto->bitsize)) |
| 17092 | r = bfd_reloc_overflow; |
| 17093 | } |
| 17094 | break; |
| 17095 | |
| 17096 | case R_PPC64_REL16DX_HA: |
| 17097 | if (rel->r_offset + 4 > input_section->size) |
| 17098 | r = bfd_reloc_outofrange; |
| 17099 | else |
| 17100 | { |
| 17101 | relocation += addend; |
| 17102 | relocation -= (rel->r_offset |
| 17103 | + input_section->output_offset |
| 17104 | + input_section->output_section->vma); |
| 17105 | relocation = (bfd_signed_vma) relocation >> 16; |
| 17106 | insn = bfd_get_32 (input_bfd, contents + rel->r_offset); |
| 17107 | insn &= ~0x1fffc1; |
| 17108 | insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15); |
| 17109 | bfd_put_32 (input_bfd, insn, contents + rel->r_offset); |
| 17110 | r = bfd_reloc_ok; |
| 17111 | if (relocation + 0x8000 > 0xffff) |
| 17112 | r = bfd_reloc_overflow; |
| 17113 | } |
| 17114 | break; |
| 17115 | |
| 17116 | default: |
| 17117 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 17118 | contents, rel->r_offset, |
| 17119 | relocation, addend); |
| 17120 | } |
| 17121 | |
| 17122 | if (r != bfd_reloc_ok) |
| 17123 | { |
| 17124 | char *more_info = NULL; |
| 17125 | const char *reloc_name = howto->name; |
| 17126 | |
| 17127 | if (reloc_dest != DEST_NORMAL) |
| 17128 | { |
| 17129 | more_info = bfd_malloc (strlen (reloc_name) + 8); |
| 17130 | if (more_info != NULL) |
| 17131 | { |
| 17132 | strcpy (more_info, reloc_name); |
| 17133 | strcat (more_info, (reloc_dest == DEST_OPD |
| 17134 | ? " (OPD)" : " (stub)")); |
| 17135 | reloc_name = more_info; |
| 17136 | } |
| 17137 | } |
| 17138 | |
| 17139 | if (r == bfd_reloc_overflow) |
| 17140 | { |
| 17141 | /* On code like "if (foo) foo();" don't report overflow |
| 17142 | on a branch to zero when foo is undefined. */ |
| 17143 | if (!warned |
| 17144 | && (reloc_dest == DEST_STUB |
| 17145 | || !(h != NULL |
| 17146 | && (h->elf.root.type == bfd_link_hash_undefweak |
| 17147 | || h->elf.root.type == bfd_link_hash_undefined) |
| 17148 | && is_branch_reloc (r_type)))) |
| 17149 | info->callbacks->reloc_overflow (info, &h->elf.root, |
| 17150 | sym_name, reloc_name, |
| 17151 | orig_rel.r_addend, |
| 17152 | input_bfd, input_section, |
| 17153 | rel->r_offset); |
| 17154 | } |
| 17155 | else |
| 17156 | { |
| 17157 | info->callbacks->einfo |
| 17158 | /* xgettext:c-format */ |
| 17159 | (_("%H: %s against `%pT': error %d\n"), |
| 17160 | input_bfd, input_section, rel->r_offset, |
| 17161 | reloc_name, sym_name, (int) r); |
| 17162 | ret = FALSE; |
| 17163 | } |
| 17164 | free (more_info); |
| 17165 | } |
| 17166 | copy_reloc: |
| 17167 | if (wrel != rel) |
| 17168 | *wrel = *rel; |
| 17169 | } |
| 17170 | |
| 17171 | if (wrel != rel) |
| 17172 | { |
| 17173 | Elf_Internal_Shdr *rel_hdr; |
| 17174 | size_t deleted = rel - wrel; |
| 17175 | |
| 17176 | rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); |
| 17177 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; |
| 17178 | if (rel_hdr->sh_size == 0) |
| 17179 | { |
| 17180 | /* It is too late to remove an empty reloc section. Leave |
| 17181 | one NONE reloc. |
| 17182 | ??? What is wrong with an empty section??? */ |
| 17183 | rel_hdr->sh_size = rel_hdr->sh_entsize; |
| 17184 | deleted -= 1; |
| 17185 | } |
| 17186 | rel_hdr = _bfd_elf_single_rel_hdr (input_section); |
| 17187 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; |
| 17188 | input_section->reloc_count -= deleted; |
| 17189 | } |
| 17190 | |
| 17191 | /* If we're emitting relocations, then shortly after this function |
| 17192 | returns, reloc offsets and addends for this section will be |
| 17193 | adjusted. Worse, reloc symbol indices will be for the output |
| 17194 | file rather than the input. Save a copy of the relocs for |
| 17195 | opd_entry_value. */ |
| 17196 | if (is_opd && (info->emitrelocations || bfd_link_relocatable (info))) |
| 17197 | { |
| 17198 | bfd_size_type amt; |
| 17199 | amt = input_section->reloc_count * sizeof (Elf_Internal_Rela); |
| 17200 | rel = bfd_alloc (input_bfd, amt); |
| 17201 | BFD_ASSERT (ppc64_elf_tdata (input_bfd)->opd.relocs == NULL); |
| 17202 | ppc64_elf_tdata (input_bfd)->opd.relocs = rel; |
| 17203 | if (rel == NULL) |
| 17204 | return FALSE; |
| 17205 | memcpy (rel, relocs, amt); |
| 17206 | } |
| 17207 | return ret; |
| 17208 | } |
| 17209 | |
| 17210 | /* Adjust the value of any local symbols in opd sections. */ |
| 17211 | |
| 17212 | static int |
| 17213 | ppc64_elf_output_symbol_hook (struct bfd_link_info *info, |
| 17214 | const char *name ATTRIBUTE_UNUSED, |
| 17215 | Elf_Internal_Sym *elfsym, |
| 17216 | asection *input_sec, |
| 17217 | struct elf_link_hash_entry *h) |
| 17218 | { |
| 17219 | struct _opd_sec_data *opd; |
| 17220 | long adjust; |
| 17221 | bfd_vma value; |
| 17222 | |
| 17223 | if (h != NULL) |
| 17224 | return 1; |
| 17225 | |
| 17226 | opd = get_opd_info (input_sec); |
| 17227 | if (opd == NULL || opd->adjust == NULL) |
| 17228 | return 1; |
| 17229 | |
| 17230 | value = elfsym->st_value - input_sec->output_offset; |
| 17231 | if (!bfd_link_relocatable (info)) |
| 17232 | value -= input_sec->output_section->vma; |
| 17233 | |
| 17234 | adjust = opd->adjust[OPD_NDX (value)]; |
| 17235 | if (adjust == -1) |
| 17236 | return 2; |
| 17237 | |
| 17238 | elfsym->st_value += adjust; |
| 17239 | return 1; |
| 17240 | } |
| 17241 | |
| 17242 | /* Finish up dynamic symbol handling. We set the contents of various |
| 17243 | dynamic sections here. */ |
| 17244 | |
| 17245 | static bfd_boolean |
| 17246 | ppc64_elf_finish_dynamic_symbol (bfd *output_bfd, |
| 17247 | struct bfd_link_info *info, |
| 17248 | struct elf_link_hash_entry *h, |
| 17249 | Elf_Internal_Sym *sym) |
| 17250 | { |
| 17251 | struct ppc_link_hash_table *htab; |
| 17252 | struct plt_entry *ent; |
| 17253 | |
| 17254 | htab = ppc_hash_table (info); |
| 17255 | if (htab == NULL) |
| 17256 | return FALSE; |
| 17257 | |
| 17258 | if (!htab->opd_abi && !h->def_regular) |
| 17259 | for (ent = h->plt.plist; ent != NULL; ent = ent->next) |
| 17260 | if (ent->plt.offset != (bfd_vma) -1) |
| 17261 | { |
| 17262 | /* Mark the symbol as undefined, rather than as |
| 17263 | defined in glink. Leave the value if there were |
| 17264 | any relocations where pointer equality matters |
| 17265 | (this is a clue for the dynamic linker, to make |
| 17266 | function pointer comparisons work between an |
| 17267 | application and shared library), otherwise set it |
| 17268 | to zero. */ |
| 17269 | sym->st_shndx = SHN_UNDEF; |
| 17270 | if (!h->pointer_equality_needed) |
| 17271 | sym->st_value = 0; |
| 17272 | else if (!h->ref_regular_nonweak) |
| 17273 | { |
| 17274 | /* This breaks function pointer comparisons, but |
| 17275 | that is better than breaking tests for a NULL |
| 17276 | function pointer. */ |
| 17277 | sym->st_value = 0; |
| 17278 | } |
| 17279 | break; |
| 17280 | } |
| 17281 | |
| 17282 | if (h->needs_copy |
| 17283 | && (h->root.type == bfd_link_hash_defined |
| 17284 | || h->root.type == bfd_link_hash_defweak) |
| 17285 | && (h->root.u.def.section == htab->elf.sdynbss |
| 17286 | || h->root.u.def.section == htab->elf.sdynrelro)) |
| 17287 | { |
| 17288 | /* This symbol needs a copy reloc. Set it up. */ |
| 17289 | Elf_Internal_Rela rela; |
| 17290 | asection *srel; |
| 17291 | bfd_byte *loc; |
| 17292 | |
| 17293 | if (h->dynindx == -1) |
| 17294 | abort (); |
| 17295 | |
| 17296 | rela.r_offset = defined_sym_val (h); |
| 17297 | rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY); |
| 17298 | rela.r_addend = 0; |
| 17299 | if (h->root.u.def.section == htab->elf.sdynrelro) |
| 17300 | srel = htab->elf.sreldynrelro; |
| 17301 | else |
| 17302 | srel = htab->elf.srelbss; |
| 17303 | loc = srel->contents; |
| 17304 | loc += srel->reloc_count++ * sizeof (Elf64_External_Rela); |
| 17305 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
| 17306 | } |
| 17307 | |
| 17308 | return TRUE; |
| 17309 | } |
| 17310 | |
| 17311 | /* Used to decide how to sort relocs in an optimal manner for the |
| 17312 | dynamic linker, before writing them out. */ |
| 17313 | |
| 17314 | static enum elf_reloc_type_class |
| 17315 | ppc64_elf_reloc_type_class (const struct bfd_link_info *info, |
| 17316 | const asection *rel_sec, |
| 17317 | const Elf_Internal_Rela *rela) |
| 17318 | { |
| 17319 | enum elf_ppc64_reloc_type r_type; |
| 17320 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
| 17321 | |
| 17322 | if (rel_sec == htab->elf.irelplt) |
| 17323 | return reloc_class_ifunc; |
| 17324 | |
| 17325 | r_type = ELF64_R_TYPE (rela->r_info); |
| 17326 | switch (r_type) |
| 17327 | { |
| 17328 | case R_PPC64_RELATIVE: |
| 17329 | return reloc_class_relative; |
| 17330 | case R_PPC64_JMP_SLOT: |
| 17331 | return reloc_class_plt; |
| 17332 | case R_PPC64_COPY: |
| 17333 | return reloc_class_copy; |
| 17334 | default: |
| 17335 | return reloc_class_normal; |
| 17336 | } |
| 17337 | } |
| 17338 | |
| 17339 | /* Finish up the dynamic sections. */ |
| 17340 | |
| 17341 | static bfd_boolean |
| 17342 | ppc64_elf_finish_dynamic_sections (bfd *output_bfd, |
| 17343 | struct bfd_link_info *info) |
| 17344 | { |
| 17345 | struct ppc_link_hash_table *htab; |
| 17346 | bfd *dynobj; |
| 17347 | asection *sdyn; |
| 17348 | |
| 17349 | htab = ppc_hash_table (info); |
| 17350 | if (htab == NULL) |
| 17351 | return FALSE; |
| 17352 | |
| 17353 | dynobj = htab->elf.dynobj; |
| 17354 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
| 17355 | |
| 17356 | if (htab->elf.dynamic_sections_created) |
| 17357 | { |
| 17358 | Elf64_External_Dyn *dyncon, *dynconend; |
| 17359 | |
| 17360 | if (sdyn == NULL || htab->elf.sgot == NULL) |
| 17361 | abort (); |
| 17362 | |
| 17363 | dyncon = (Elf64_External_Dyn *) sdyn->contents; |
| 17364 | dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size); |
| 17365 | for (; dyncon < dynconend; dyncon++) |
| 17366 | { |
| 17367 | Elf_Internal_Dyn dyn; |
| 17368 | asection *s; |
| 17369 | |
| 17370 | bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); |
| 17371 | |
| 17372 | switch (dyn.d_tag) |
| 17373 | { |
| 17374 | default: |
| 17375 | continue; |
| 17376 | |
| 17377 | case DT_PPC64_GLINK: |
| 17378 | s = htab->glink; |
| 17379 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
| 17380 | /* We stupidly defined DT_PPC64_GLINK to be the start |
| 17381 | of glink rather than the first entry point, which is |
| 17382 | what ld.so needs, and now have a bigger stub to |
| 17383 | support automatic multiple TOCs. */ |
| 17384 | dyn.d_un.d_ptr += GLINK_PLTRESOLVE_SIZE (htab) - 8 * 4; |
| 17385 | break; |
| 17386 | |
| 17387 | case DT_PPC64_OPD: |
| 17388 | s = bfd_get_section_by_name (output_bfd, ".opd"); |
| 17389 | if (s == NULL) |
| 17390 | continue; |
| 17391 | dyn.d_un.d_ptr = s->vma; |
| 17392 | break; |
| 17393 | |
| 17394 | case DT_PPC64_OPT: |
| 17395 | if ((htab->do_multi_toc && htab->multi_toc_needed) |
| 17396 | || htab->notoc_plt) |
| 17397 | dyn.d_un.d_val |= PPC64_OPT_MULTI_TOC; |
| 17398 | if (htab->has_plt_localentry0) |
| 17399 | dyn.d_un.d_val |= PPC64_OPT_LOCALENTRY; |
| 17400 | break; |
| 17401 | |
| 17402 | case DT_PPC64_OPDSZ: |
| 17403 | s = bfd_get_section_by_name (output_bfd, ".opd"); |
| 17404 | if (s == NULL) |
| 17405 | continue; |
| 17406 | dyn.d_un.d_val = s->size; |
| 17407 | break; |
| 17408 | |
| 17409 | case DT_PLTGOT: |
| 17410 | s = htab->elf.splt; |
| 17411 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
| 17412 | break; |
| 17413 | |
| 17414 | case DT_JMPREL: |
| 17415 | s = htab->elf.srelplt; |
| 17416 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
| 17417 | break; |
| 17418 | |
| 17419 | case DT_PLTRELSZ: |
| 17420 | dyn.d_un.d_val = htab->elf.srelplt->size; |
| 17421 | break; |
| 17422 | |
| 17423 | case DT_TEXTREL: |
| 17424 | if (htab->local_ifunc_resolver) |
| 17425 | info->callbacks->einfo |
| 17426 | (_("%X%P: text relocations and GNU indirect " |
| 17427 | "functions will result in a segfault at runtime\n")); |
| 17428 | else if (htab->maybe_local_ifunc_resolver) |
| 17429 | info->callbacks->einfo |
| 17430 | (_("%P: warning: text relocations and GNU indirect " |
| 17431 | "functions may result in a segfault at runtime\n")); |
| 17432 | continue; |
| 17433 | } |
| 17434 | |
| 17435 | bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 17436 | } |
| 17437 | } |
| 17438 | |
| 17439 | if (htab->elf.sgot != NULL && htab->elf.sgot->size != 0 |
| 17440 | && htab->elf.sgot->output_section != bfd_abs_section_ptr) |
| 17441 | { |
| 17442 | /* Fill in the first entry in the global offset table. |
| 17443 | We use it to hold the link-time TOCbase. */ |
| 17444 | bfd_put_64 (output_bfd, |
| 17445 | elf_gp (output_bfd) + TOC_BASE_OFF, |
| 17446 | htab->elf.sgot->contents); |
| 17447 | |
| 17448 | /* Set .got entry size. */ |
| 17449 | elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize |
| 17450 | = 8; |
| 17451 | } |
| 17452 | |
| 17453 | if (htab->elf.splt != NULL && htab->elf.splt->size != 0 |
| 17454 | && htab->elf.splt->output_section != bfd_abs_section_ptr) |
| 17455 | { |
| 17456 | /* Set .plt entry size. */ |
| 17457 | elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize |
| 17458 | = PLT_ENTRY_SIZE (htab); |
| 17459 | } |
| 17460 | |
| 17461 | /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for |
| 17462 | brlt ourselves if emitrelocations. */ |
| 17463 | if (htab->brlt != NULL |
| 17464 | && htab->brlt->reloc_count != 0 |
| 17465 | && !_bfd_elf_link_output_relocs (output_bfd, |
| 17466 | htab->brlt, |
| 17467 | elf_section_data (htab->brlt)->rela.hdr, |
| 17468 | elf_section_data (htab->brlt)->relocs, |
| 17469 | NULL)) |
| 17470 | return FALSE; |
| 17471 | |
| 17472 | if (htab->glink != NULL |
| 17473 | && htab->glink->reloc_count != 0 |
| 17474 | && !_bfd_elf_link_output_relocs (output_bfd, |
| 17475 | htab->glink, |
| 17476 | elf_section_data (htab->glink)->rela.hdr, |
| 17477 | elf_section_data (htab->glink)->relocs, |
| 17478 | NULL)) |
| 17479 | return FALSE; |
| 17480 | |
| 17481 | |
| 17482 | if (htab->glink_eh_frame != NULL |
| 17483 | && htab->glink_eh_frame->size != 0 |
| 17484 | && htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME |
| 17485 | && !_bfd_elf_write_section_eh_frame (output_bfd, info, |
| 17486 | htab->glink_eh_frame, |
| 17487 | htab->glink_eh_frame->contents)) |
| 17488 | return FALSE; |
| 17489 | |
| 17490 | /* We need to handle writing out multiple GOT sections ourselves, |
| 17491 | since we didn't add them to DYNOBJ. We know dynobj is the first |
| 17492 | bfd. */ |
| 17493 | while ((dynobj = dynobj->link.next) != NULL) |
| 17494 | { |
| 17495 | asection *s; |
| 17496 | |
| 17497 | if (!is_ppc64_elf (dynobj)) |
| 17498 | continue; |
| 17499 | |
| 17500 | s = ppc64_elf_tdata (dynobj)->got; |
| 17501 | if (s != NULL |
| 17502 | && s->size != 0 |
| 17503 | && s->output_section != bfd_abs_section_ptr |
| 17504 | && !bfd_set_section_contents (output_bfd, s->output_section, |
| 17505 | s->contents, s->output_offset, |
| 17506 | s->size)) |
| 17507 | return FALSE; |
| 17508 | s = ppc64_elf_tdata (dynobj)->relgot; |
| 17509 | if (s != NULL |
| 17510 | && s->size != 0 |
| 17511 | && s->output_section != bfd_abs_section_ptr |
| 17512 | && !bfd_set_section_contents (output_bfd, s->output_section, |
| 17513 | s->contents, s->output_offset, |
| 17514 | s->size)) |
| 17515 | return FALSE; |
| 17516 | } |
| 17517 | |
| 17518 | return TRUE; |
| 17519 | } |
| 17520 | |
| 17521 | #include "elf64-target.h" |
| 17522 | |
| 17523 | /* FreeBSD support */ |
| 17524 | |
| 17525 | #undef TARGET_LITTLE_SYM |
| 17526 | #undef TARGET_LITTLE_NAME |
| 17527 | |
| 17528 | #undef TARGET_BIG_SYM |
| 17529 | #define TARGET_BIG_SYM powerpc_elf64_fbsd_vec |
| 17530 | #undef TARGET_BIG_NAME |
| 17531 | #define TARGET_BIG_NAME "elf64-powerpc-freebsd" |
| 17532 | |
| 17533 | #undef ELF_OSABI |
| 17534 | #define ELF_OSABI ELFOSABI_FREEBSD |
| 17535 | |
| 17536 | #undef elf64_bed |
| 17537 | #define elf64_bed elf64_powerpc_fbsd_bed |
| 17538 | |
| 17539 | #include "elf64-target.h" |