| 1 | /* X86-64 specific support for 64-bit ELF |
| 2 | Copyright 2000, 2001, 2002, 2003 Free Software Foundation, Inc. |
| 3 | Contributed by Jan Hubicka <jh@suse.cz>. |
| 4 | |
| 5 | This file is part of BFD, the Binary File Descriptor library. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 20 | |
| 21 | #include "bfd.h" |
| 22 | #include "sysdep.h" |
| 23 | #include "bfdlink.h" |
| 24 | #include "libbfd.h" |
| 25 | #include "elf-bfd.h" |
| 26 | |
| 27 | #include "elf/x86-64.h" |
| 28 | |
| 29 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */ |
| 30 | #define MINUS_ONE (~ (bfd_vma) 0) |
| 31 | |
| 32 | /* The relocation "howto" table. Order of fields: |
| 33 | type, size, bitsize, pc_relative, complain_on_overflow, |
| 34 | special_function, name, partial_inplace, src_mask, dst_pack, pcrel_offset. */ |
| 35 | static reloc_howto_type x86_64_elf_howto_table[] = |
| 36 | { |
| 37 | HOWTO(R_X86_64_NONE, 0, 0, 0, FALSE, 0, complain_overflow_dont, |
| 38 | bfd_elf_generic_reloc, "R_X86_64_NONE", FALSE, 0x00000000, 0x00000000, |
| 39 | FALSE), |
| 40 | HOWTO(R_X86_64_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
| 41 | bfd_elf_generic_reloc, "R_X86_64_64", FALSE, MINUS_ONE, MINUS_ONE, |
| 42 | FALSE), |
| 43 | HOWTO(R_X86_64_PC32, 0, 2, 32, TRUE, 0, complain_overflow_signed, |
| 44 | bfd_elf_generic_reloc, "R_X86_64_PC32", FALSE, 0xffffffff, 0xffffffff, |
| 45 | TRUE), |
| 46 | HOWTO(R_X86_64_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_signed, |
| 47 | bfd_elf_generic_reloc, "R_X86_64_GOT32", FALSE, 0xffffffff, 0xffffffff, |
| 48 | FALSE), |
| 49 | HOWTO(R_X86_64_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_signed, |
| 50 | bfd_elf_generic_reloc, "R_X86_64_PLT32", FALSE, 0xffffffff, 0xffffffff, |
| 51 | TRUE), |
| 52 | HOWTO(R_X86_64_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
| 53 | bfd_elf_generic_reloc, "R_X86_64_COPY", FALSE, 0xffffffff, 0xffffffff, |
| 54 | FALSE), |
| 55 | HOWTO(R_X86_64_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
| 56 | bfd_elf_generic_reloc, "R_X86_64_GLOB_DAT", FALSE, MINUS_ONE, |
| 57 | MINUS_ONE, FALSE), |
| 58 | HOWTO(R_X86_64_JUMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
| 59 | bfd_elf_generic_reloc, "R_X86_64_JUMP_SLOT", FALSE, MINUS_ONE, |
| 60 | MINUS_ONE, FALSE), |
| 61 | HOWTO(R_X86_64_RELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
| 62 | bfd_elf_generic_reloc, "R_X86_64_RELATIVE", FALSE, MINUS_ONE, |
| 63 | MINUS_ONE, FALSE), |
| 64 | HOWTO(R_X86_64_GOTPCREL, 0, 2, 32, TRUE, 0, complain_overflow_signed, |
| 65 | bfd_elf_generic_reloc, "R_X86_64_GOTPCREL", FALSE, 0xffffffff, |
| 66 | 0xffffffff, TRUE), |
| 67 | HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned, |
| 68 | bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff, |
| 69 | FALSE), |
| 70 | HOWTO(R_X86_64_32S, 0, 2, 32, FALSE, 0, complain_overflow_signed, |
| 71 | bfd_elf_generic_reloc, "R_X86_64_32S", FALSE, 0xffffffff, 0xffffffff, |
| 72 | FALSE), |
| 73 | HOWTO(R_X86_64_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, |
| 74 | bfd_elf_generic_reloc, "R_X86_64_16", FALSE, 0xffff, 0xffff, FALSE), |
| 75 | HOWTO(R_X86_64_PC16,0, 1, 16, TRUE, 0, complain_overflow_bitfield, |
| 76 | bfd_elf_generic_reloc, "R_X86_64_PC16", FALSE, 0xffff, 0xffff, TRUE), |
| 77 | HOWTO(R_X86_64_8, 0, 0, 8, FALSE, 0, complain_overflow_signed, |
| 78 | bfd_elf_generic_reloc, "R_X86_64_8", FALSE, 0xff, 0xff, FALSE), |
| 79 | HOWTO(R_X86_64_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed, |
| 80 | bfd_elf_generic_reloc, "R_X86_64_PC8", FALSE, 0xff, 0xff, TRUE), |
| 81 | HOWTO(R_X86_64_DTPMOD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
| 82 | bfd_elf_generic_reloc, "R_X86_64_DTPMOD64", FALSE, MINUS_ONE, |
| 83 | MINUS_ONE, FALSE), |
| 84 | HOWTO(R_X86_64_DTPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
| 85 | bfd_elf_generic_reloc, "R_X86_64_DTPOFF64", FALSE, MINUS_ONE, |
| 86 | MINUS_ONE, FALSE), |
| 87 | HOWTO(R_X86_64_TPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
| 88 | bfd_elf_generic_reloc, "R_X86_64_TPOFF64", FALSE, MINUS_ONE, |
| 89 | MINUS_ONE, FALSE), |
| 90 | HOWTO(R_X86_64_TLSGD, 0, 2, 32, TRUE, 0, complain_overflow_signed, |
| 91 | bfd_elf_generic_reloc, "R_X86_64_TLSGD", FALSE, 0xffffffff, |
| 92 | 0xffffffff, TRUE), |
| 93 | HOWTO(R_X86_64_TLSLD, 0, 2, 32, TRUE, 0, complain_overflow_signed, |
| 94 | bfd_elf_generic_reloc, "R_X86_64_TLSLD", FALSE, 0xffffffff, |
| 95 | 0xffffffff, TRUE), |
| 96 | HOWTO(R_X86_64_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
| 97 | bfd_elf_generic_reloc, "R_X86_64_DTPOFF32", FALSE, 0xffffffff, |
| 98 | 0xffffffff, FALSE), |
| 99 | HOWTO(R_X86_64_GOTTPOFF, 0, 2, 32, TRUE, 0, complain_overflow_signed, |
| 100 | bfd_elf_generic_reloc, "R_X86_64_GOTTPOFF", FALSE, 0xffffffff, |
| 101 | 0xffffffff, TRUE), |
| 102 | HOWTO(R_X86_64_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed, |
| 103 | bfd_elf_generic_reloc, "R_X86_64_TPOFF32", FALSE, 0xffffffff, |
| 104 | 0xffffffff, FALSE), |
| 105 | |
| 106 | /* GNU extension to record C++ vtable hierarchy. */ |
| 107 | HOWTO (R_X86_64_GNU_VTINHERIT, 0, 4, 0, FALSE, 0, complain_overflow_dont, |
| 108 | NULL, "R_X86_64_GNU_VTINHERIT", FALSE, 0, 0, FALSE), |
| 109 | |
| 110 | /* GNU extension to record C++ vtable member usage. */ |
| 111 | HOWTO (R_X86_64_GNU_VTENTRY, 0, 4, 0, FALSE, 0, complain_overflow_dont, |
| 112 | _bfd_elf_rel_vtable_reloc_fn, "R_X86_64_GNU_VTENTRY", FALSE, 0, 0, |
| 113 | FALSE) |
| 114 | }; |
| 115 | |
| 116 | /* Map BFD relocs to the x86_64 elf relocs. */ |
| 117 | struct elf_reloc_map |
| 118 | { |
| 119 | bfd_reloc_code_real_type bfd_reloc_val; |
| 120 | unsigned char elf_reloc_val; |
| 121 | }; |
| 122 | |
| 123 | static const struct elf_reloc_map x86_64_reloc_map[] = |
| 124 | { |
| 125 | { BFD_RELOC_NONE, R_X86_64_NONE, }, |
| 126 | { BFD_RELOC_64, R_X86_64_64, }, |
| 127 | { BFD_RELOC_32_PCREL, R_X86_64_PC32, }, |
| 128 | { BFD_RELOC_X86_64_GOT32, R_X86_64_GOT32,}, |
| 129 | { BFD_RELOC_X86_64_PLT32, R_X86_64_PLT32,}, |
| 130 | { BFD_RELOC_X86_64_COPY, R_X86_64_COPY, }, |
| 131 | { BFD_RELOC_X86_64_GLOB_DAT, R_X86_64_GLOB_DAT, }, |
| 132 | { BFD_RELOC_X86_64_JUMP_SLOT, R_X86_64_JUMP_SLOT, }, |
| 133 | { BFD_RELOC_X86_64_RELATIVE, R_X86_64_RELATIVE, }, |
| 134 | { BFD_RELOC_X86_64_GOTPCREL, R_X86_64_GOTPCREL, }, |
| 135 | { BFD_RELOC_32, R_X86_64_32, }, |
| 136 | { BFD_RELOC_X86_64_32S, R_X86_64_32S, }, |
| 137 | { BFD_RELOC_16, R_X86_64_16, }, |
| 138 | { BFD_RELOC_16_PCREL, R_X86_64_PC16, }, |
| 139 | { BFD_RELOC_8, R_X86_64_8, }, |
| 140 | { BFD_RELOC_8_PCREL, R_X86_64_PC8, }, |
| 141 | { BFD_RELOC_X86_64_DTPMOD64, R_X86_64_DTPMOD64, }, |
| 142 | { BFD_RELOC_X86_64_DTPOFF64, R_X86_64_DTPOFF64, }, |
| 143 | { BFD_RELOC_X86_64_TPOFF64, R_X86_64_TPOFF64, }, |
| 144 | { BFD_RELOC_X86_64_TLSGD, R_X86_64_TLSGD, }, |
| 145 | { BFD_RELOC_X86_64_TLSLD, R_X86_64_TLSLD, }, |
| 146 | { BFD_RELOC_X86_64_DTPOFF32, R_X86_64_DTPOFF32, }, |
| 147 | { BFD_RELOC_X86_64_GOTTPOFF, R_X86_64_GOTTPOFF, }, |
| 148 | { BFD_RELOC_X86_64_TPOFF32, R_X86_64_TPOFF32, }, |
| 149 | { BFD_RELOC_VTABLE_INHERIT, R_X86_64_GNU_VTINHERIT, }, |
| 150 | { BFD_RELOC_VTABLE_ENTRY, R_X86_64_GNU_VTENTRY, }, |
| 151 | }; |
| 152 | |
| 153 | static reloc_howto_type *elf64_x86_64_reloc_type_lookup |
| 154 | PARAMS ((bfd *, bfd_reloc_code_real_type)); |
| 155 | static void elf64_x86_64_info_to_howto |
| 156 | PARAMS ((bfd *, arelent *, Elf_Internal_Rela *)); |
| 157 | static bfd_boolean elf64_x86_64_grok_prstatus |
| 158 | PARAMS ((bfd *, Elf_Internal_Note *)); |
| 159 | static bfd_boolean elf64_x86_64_grok_psinfo |
| 160 | PARAMS ((bfd *, Elf_Internal_Note *)); |
| 161 | static struct bfd_link_hash_table *elf64_x86_64_link_hash_table_create |
| 162 | PARAMS ((bfd *)); |
| 163 | static int elf64_x86_64_tls_transition |
| 164 | PARAMS ((struct bfd_link_info *, int, int)); |
| 165 | static bfd_boolean elf64_x86_64_mkobject |
| 166 | PARAMS((bfd *)); |
| 167 | static bfd_boolean elf64_x86_64_elf_object_p PARAMS ((bfd *abfd)); |
| 168 | static bfd_boolean create_got_section |
| 169 | PARAMS((bfd *, struct bfd_link_info *)); |
| 170 | static bfd_boolean elf64_x86_64_create_dynamic_sections |
| 171 | PARAMS((bfd *, struct bfd_link_info *)); |
| 172 | static void elf64_x86_64_copy_indirect_symbol |
| 173 | PARAMS ((struct elf_backend_data *, struct elf_link_hash_entry *, |
| 174 | struct elf_link_hash_entry *)); |
| 175 | static bfd_boolean elf64_x86_64_check_relocs |
| 176 | PARAMS ((bfd *, struct bfd_link_info *, asection *sec, |
| 177 | const Elf_Internal_Rela *)); |
| 178 | static asection *elf64_x86_64_gc_mark_hook |
| 179 | PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *, |
| 180 | struct elf_link_hash_entry *, Elf_Internal_Sym *)); |
| 181 | |
| 182 | static bfd_boolean elf64_x86_64_gc_sweep_hook |
| 183 | PARAMS ((bfd *, struct bfd_link_info *, asection *, |
| 184 | const Elf_Internal_Rela *)); |
| 185 | |
| 186 | static struct bfd_hash_entry *link_hash_newfunc |
| 187 | PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); |
| 188 | static bfd_boolean elf64_x86_64_adjust_dynamic_symbol |
| 189 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); |
| 190 | |
| 191 | static bfd_boolean allocate_dynrelocs |
| 192 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
| 193 | static bfd_boolean readonly_dynrelocs |
| 194 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
| 195 | static bfd_boolean elf64_x86_64_size_dynamic_sections |
| 196 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 197 | static bfd_vma dtpoff_base |
| 198 | PARAMS ((struct bfd_link_info *)); |
| 199 | static bfd_vma tpoff |
| 200 | PARAMS ((struct bfd_link_info *, bfd_vma)); |
| 201 | static bfd_boolean elf64_x86_64_relocate_section |
| 202 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
| 203 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); |
| 204 | static bfd_boolean elf64_x86_64_finish_dynamic_symbol |
| 205 | PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, |
| 206 | Elf_Internal_Sym *sym)); |
| 207 | static bfd_boolean elf64_x86_64_finish_dynamic_sections |
| 208 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 209 | static enum elf_reloc_type_class elf64_x86_64_reloc_type_class |
| 210 | PARAMS ((const Elf_Internal_Rela *)); |
| 211 | |
| 212 | /* Given a BFD reloc type, return a HOWTO structure. */ |
| 213 | static reloc_howto_type * |
| 214 | elf64_x86_64_reloc_type_lookup (abfd, code) |
| 215 | bfd *abfd ATTRIBUTE_UNUSED; |
| 216 | bfd_reloc_code_real_type code; |
| 217 | { |
| 218 | unsigned int i; |
| 219 | for (i = 0; i < sizeof (x86_64_reloc_map) / sizeof (struct elf_reloc_map); |
| 220 | i++) |
| 221 | { |
| 222 | if (x86_64_reloc_map[i].bfd_reloc_val == code) |
| 223 | return &x86_64_elf_howto_table[i]; |
| 224 | } |
| 225 | return 0; |
| 226 | } |
| 227 | |
| 228 | /* Given an x86_64 ELF reloc type, fill in an arelent structure. */ |
| 229 | |
| 230 | static void |
| 231 | elf64_x86_64_info_to_howto (abfd, cache_ptr, dst) |
| 232 | bfd *abfd ATTRIBUTE_UNUSED; |
| 233 | arelent *cache_ptr; |
| 234 | Elf_Internal_Rela *dst; |
| 235 | { |
| 236 | unsigned r_type, i; |
| 237 | |
| 238 | r_type = ELF64_R_TYPE (dst->r_info); |
| 239 | if (r_type < (unsigned int) R_X86_64_GNU_VTINHERIT) |
| 240 | { |
| 241 | BFD_ASSERT (r_type <= (unsigned int) R_X86_64_TPOFF32); |
| 242 | i = r_type; |
| 243 | } |
| 244 | else |
| 245 | { |
| 246 | BFD_ASSERT (r_type < (unsigned int) R_X86_64_max); |
| 247 | i = r_type - ((unsigned int) R_X86_64_GNU_VTINHERIT - R_X86_64_TPOFF32 - 1); |
| 248 | } |
| 249 | cache_ptr->howto = &x86_64_elf_howto_table[i]; |
| 250 | BFD_ASSERT (r_type == cache_ptr->howto->type); |
| 251 | } |
| 252 | \f |
| 253 | /* Support for core dump NOTE sections. */ |
| 254 | static bfd_boolean |
| 255 | elf64_x86_64_grok_prstatus (abfd, note) |
| 256 | bfd *abfd; |
| 257 | Elf_Internal_Note *note; |
| 258 | { |
| 259 | int offset; |
| 260 | size_t raw_size; |
| 261 | |
| 262 | switch (note->descsz) |
| 263 | { |
| 264 | default: |
| 265 | return FALSE; |
| 266 | |
| 267 | case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */ |
| 268 | /* pr_cursig */ |
| 269 | elf_tdata (abfd)->core_signal |
| 270 | = bfd_get_16 (abfd, note->descdata + 12); |
| 271 | |
| 272 | /* pr_pid */ |
| 273 | elf_tdata (abfd)->core_pid |
| 274 | = bfd_get_32 (abfd, note->descdata + 32); |
| 275 | |
| 276 | /* pr_reg */ |
| 277 | offset = 112; |
| 278 | raw_size = 216; |
| 279 | |
| 280 | break; |
| 281 | } |
| 282 | |
| 283 | /* Make a ".reg/999" section. */ |
| 284 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", |
| 285 | raw_size, note->descpos + offset); |
| 286 | } |
| 287 | |
| 288 | static bfd_boolean |
| 289 | elf64_x86_64_grok_psinfo (abfd, note) |
| 290 | bfd *abfd; |
| 291 | Elf_Internal_Note *note; |
| 292 | { |
| 293 | switch (note->descsz) |
| 294 | { |
| 295 | default: |
| 296 | return FALSE; |
| 297 | |
| 298 | case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */ |
| 299 | elf_tdata (abfd)->core_program |
| 300 | = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16); |
| 301 | elf_tdata (abfd)->core_command |
| 302 | = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80); |
| 303 | } |
| 304 | |
| 305 | /* Note that for some reason, a spurious space is tacked |
| 306 | onto the end of the args in some (at least one anyway) |
| 307 | implementations, so strip it off if it exists. */ |
| 308 | |
| 309 | { |
| 310 | char *command = elf_tdata (abfd)->core_command; |
| 311 | int n = strlen (command); |
| 312 | |
| 313 | if (0 < n && command[n - 1] == ' ') |
| 314 | command[n - 1] = '\0'; |
| 315 | } |
| 316 | |
| 317 | return TRUE; |
| 318 | } |
| 319 | \f |
| 320 | /* Functions for the x86-64 ELF linker. */ |
| 321 | |
| 322 | /* The name of the dynamic interpreter. This is put in the .interp |
| 323 | section. */ |
| 324 | |
| 325 | #define ELF_DYNAMIC_INTERPRETER "/lib/ld64.so.1" |
| 326 | |
| 327 | /* The size in bytes of an entry in the global offset table. */ |
| 328 | |
| 329 | #define GOT_ENTRY_SIZE 8 |
| 330 | |
| 331 | /* The size in bytes of an entry in the procedure linkage table. */ |
| 332 | |
| 333 | #define PLT_ENTRY_SIZE 16 |
| 334 | |
| 335 | /* The first entry in a procedure linkage table looks like this. See the |
| 336 | SVR4 ABI i386 supplement and the x86-64 ABI to see how this works. */ |
| 337 | |
| 338 | static const bfd_byte elf64_x86_64_plt0_entry[PLT_ENTRY_SIZE] = |
| 339 | { |
| 340 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ |
| 341 | 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */ |
| 342 | 0x90, 0x90, 0x90, 0x90 /* pad out to 16 bytes with nops. */ |
| 343 | }; |
| 344 | |
| 345 | /* Subsequent entries in a procedure linkage table look like this. */ |
| 346 | |
| 347 | static const bfd_byte elf64_x86_64_plt_entry[PLT_ENTRY_SIZE] = |
| 348 | { |
| 349 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ |
| 350 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ |
| 351 | 0x68, /* pushq immediate */ |
| 352 | 0, 0, 0, 0, /* replaced with index into relocation table. */ |
| 353 | 0xe9, /* jmp relative */ |
| 354 | 0, 0, 0, 0 /* replaced with offset to start of .plt0. */ |
| 355 | }; |
| 356 | |
| 357 | /* The x86-64 linker needs to keep track of the number of relocs that |
| 358 | it decides to copy as dynamic relocs in check_relocs for each symbol. |
| 359 | This is so that it can later discard them if they are found to be |
| 360 | unnecessary. We store the information in a field extending the |
| 361 | regular ELF linker hash table. */ |
| 362 | |
| 363 | struct elf64_x86_64_dyn_relocs |
| 364 | { |
| 365 | /* Next section. */ |
| 366 | struct elf64_x86_64_dyn_relocs *next; |
| 367 | |
| 368 | /* The input section of the reloc. */ |
| 369 | asection *sec; |
| 370 | |
| 371 | /* Total number of relocs copied for the input section. */ |
| 372 | bfd_size_type count; |
| 373 | |
| 374 | /* Number of pc-relative relocs copied for the input section. */ |
| 375 | bfd_size_type pc_count; |
| 376 | }; |
| 377 | |
| 378 | /* x86-64 ELF linker hash entry. */ |
| 379 | |
| 380 | struct elf64_x86_64_link_hash_entry |
| 381 | { |
| 382 | struct elf_link_hash_entry elf; |
| 383 | |
| 384 | /* Track dynamic relocs copied for this symbol. */ |
| 385 | struct elf64_x86_64_dyn_relocs *dyn_relocs; |
| 386 | |
| 387 | #define GOT_UNKNOWN 0 |
| 388 | #define GOT_NORMAL 1 |
| 389 | #define GOT_TLS_GD 2 |
| 390 | #define GOT_TLS_IE 3 |
| 391 | unsigned char tls_type; |
| 392 | }; |
| 393 | |
| 394 | #define elf64_x86_64_hash_entry(ent) \ |
| 395 | ((struct elf64_x86_64_link_hash_entry *)(ent)) |
| 396 | |
| 397 | struct elf64_x86_64_obj_tdata |
| 398 | { |
| 399 | struct elf_obj_tdata root; |
| 400 | |
| 401 | /* tls_type for each local got entry. */ |
| 402 | char *local_got_tls_type; |
| 403 | }; |
| 404 | |
| 405 | #define elf64_x86_64_tdata(abfd) \ |
| 406 | ((struct elf64_x86_64_obj_tdata *) (abfd)->tdata.any) |
| 407 | |
| 408 | #define elf64_x86_64_local_got_tls_type(abfd) \ |
| 409 | (elf64_x86_64_tdata (abfd)->local_got_tls_type) |
| 410 | |
| 411 | |
| 412 | /* x86-64 ELF linker hash table. */ |
| 413 | |
| 414 | struct elf64_x86_64_link_hash_table |
| 415 | { |
| 416 | struct elf_link_hash_table elf; |
| 417 | |
| 418 | /* Short-cuts to get to dynamic linker sections. */ |
| 419 | asection *sgot; |
| 420 | asection *sgotplt; |
| 421 | asection *srelgot; |
| 422 | asection *splt; |
| 423 | asection *srelplt; |
| 424 | asection *sdynbss; |
| 425 | asection *srelbss; |
| 426 | |
| 427 | union { |
| 428 | bfd_signed_vma refcount; |
| 429 | bfd_vma offset; |
| 430 | } tls_ld_got; |
| 431 | |
| 432 | /* Small local sym to section mapping cache. */ |
| 433 | struct sym_sec_cache sym_sec; |
| 434 | }; |
| 435 | |
| 436 | /* Get the x86-64 ELF linker hash table from a link_info structure. */ |
| 437 | |
| 438 | #define elf64_x86_64_hash_table(p) \ |
| 439 | ((struct elf64_x86_64_link_hash_table *) ((p)->hash)) |
| 440 | |
| 441 | /* Create an entry in an x86-64 ELF linker hash table. */ |
| 442 | |
| 443 | static struct bfd_hash_entry * |
| 444 | link_hash_newfunc (entry, table, string) |
| 445 | struct bfd_hash_entry *entry; |
| 446 | struct bfd_hash_table *table; |
| 447 | const char *string; |
| 448 | { |
| 449 | /* Allocate the structure if it has not already been allocated by a |
| 450 | subclass. */ |
| 451 | if (entry == NULL) |
| 452 | { |
| 453 | entry = bfd_hash_allocate (table, |
| 454 | sizeof (struct elf64_x86_64_link_hash_entry)); |
| 455 | if (entry == NULL) |
| 456 | return entry; |
| 457 | } |
| 458 | |
| 459 | /* Call the allocation method of the superclass. */ |
| 460 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
| 461 | if (entry != NULL) |
| 462 | { |
| 463 | struct elf64_x86_64_link_hash_entry *eh; |
| 464 | |
| 465 | eh = (struct elf64_x86_64_link_hash_entry *) entry; |
| 466 | eh->dyn_relocs = NULL; |
| 467 | eh->tls_type = GOT_UNKNOWN; |
| 468 | } |
| 469 | |
| 470 | return entry; |
| 471 | } |
| 472 | |
| 473 | /* Create an X86-64 ELF linker hash table. */ |
| 474 | |
| 475 | static struct bfd_link_hash_table * |
| 476 | elf64_x86_64_link_hash_table_create (abfd) |
| 477 | bfd *abfd; |
| 478 | { |
| 479 | struct elf64_x86_64_link_hash_table *ret; |
| 480 | bfd_size_type amt = sizeof (struct elf64_x86_64_link_hash_table); |
| 481 | |
| 482 | ret = (struct elf64_x86_64_link_hash_table *) bfd_malloc (amt); |
| 483 | if (ret == NULL) |
| 484 | return NULL; |
| 485 | |
| 486 | if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc)) |
| 487 | { |
| 488 | free (ret); |
| 489 | return NULL; |
| 490 | } |
| 491 | |
| 492 | ret->sgot = NULL; |
| 493 | ret->sgotplt = NULL; |
| 494 | ret->srelgot = NULL; |
| 495 | ret->splt = NULL; |
| 496 | ret->srelplt = NULL; |
| 497 | ret->sdynbss = NULL; |
| 498 | ret->srelbss = NULL; |
| 499 | ret->sym_sec.abfd = NULL; |
| 500 | ret->tls_ld_got.refcount = 0; |
| 501 | |
| 502 | return &ret->elf.root; |
| 503 | } |
| 504 | |
| 505 | /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up |
| 506 | shortcuts to them in our hash table. */ |
| 507 | |
| 508 | static bfd_boolean |
| 509 | create_got_section (dynobj, info) |
| 510 | bfd *dynobj; |
| 511 | struct bfd_link_info *info; |
| 512 | { |
| 513 | struct elf64_x86_64_link_hash_table *htab; |
| 514 | |
| 515 | if (! _bfd_elf_create_got_section (dynobj, info)) |
| 516 | return FALSE; |
| 517 | |
| 518 | htab = elf64_x86_64_hash_table (info); |
| 519 | htab->sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 520 | htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); |
| 521 | if (!htab->sgot || !htab->sgotplt) |
| 522 | abort (); |
| 523 | |
| 524 | htab->srelgot = bfd_make_section (dynobj, ".rela.got"); |
| 525 | if (htab->srelgot == NULL |
| 526 | || ! bfd_set_section_flags (dynobj, htab->srelgot, |
| 527 | (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS |
| 528 | | SEC_IN_MEMORY | SEC_LINKER_CREATED |
| 529 | | SEC_READONLY)) |
| 530 | || ! bfd_set_section_alignment (dynobj, htab->srelgot, 3)) |
| 531 | return FALSE; |
| 532 | return TRUE; |
| 533 | } |
| 534 | |
| 535 | /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and |
| 536 | .rela.bss sections in DYNOBJ, and set up shortcuts to them in our |
| 537 | hash table. */ |
| 538 | |
| 539 | static bfd_boolean |
| 540 | elf64_x86_64_create_dynamic_sections (dynobj, info) |
| 541 | bfd *dynobj; |
| 542 | struct bfd_link_info *info; |
| 543 | { |
| 544 | struct elf64_x86_64_link_hash_table *htab; |
| 545 | |
| 546 | htab = elf64_x86_64_hash_table (info); |
| 547 | if (!htab->sgot && !create_got_section (dynobj, info)) |
| 548 | return FALSE; |
| 549 | |
| 550 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) |
| 551 | return FALSE; |
| 552 | |
| 553 | htab->splt = bfd_get_section_by_name (dynobj, ".plt"); |
| 554 | htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt"); |
| 555 | htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss"); |
| 556 | if (!info->shared) |
| 557 | htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss"); |
| 558 | |
| 559 | if (!htab->splt || !htab->srelplt || !htab->sdynbss |
| 560 | || (!info->shared && !htab->srelbss)) |
| 561 | abort (); |
| 562 | |
| 563 | return TRUE; |
| 564 | } |
| 565 | |
| 566 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
| 567 | |
| 568 | static void |
| 569 | elf64_x86_64_copy_indirect_symbol (bed, dir, ind) |
| 570 | struct elf_backend_data *bed; |
| 571 | struct elf_link_hash_entry *dir, *ind; |
| 572 | { |
| 573 | struct elf64_x86_64_link_hash_entry *edir, *eind; |
| 574 | |
| 575 | edir = (struct elf64_x86_64_link_hash_entry *) dir; |
| 576 | eind = (struct elf64_x86_64_link_hash_entry *) ind; |
| 577 | |
| 578 | if (eind->dyn_relocs != NULL) |
| 579 | { |
| 580 | if (edir->dyn_relocs != NULL) |
| 581 | { |
| 582 | struct elf64_x86_64_dyn_relocs **pp; |
| 583 | struct elf64_x86_64_dyn_relocs *p; |
| 584 | |
| 585 | if (ind->root.type == bfd_link_hash_indirect) |
| 586 | abort (); |
| 587 | |
| 588 | /* Add reloc counts against the weak sym to the strong sym |
| 589 | list. Merge any entries against the same section. */ |
| 590 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) |
| 591 | { |
| 592 | struct elf64_x86_64_dyn_relocs *q; |
| 593 | |
| 594 | for (q = edir->dyn_relocs; q != NULL; q = q->next) |
| 595 | if (q->sec == p->sec) |
| 596 | { |
| 597 | q->pc_count += p->pc_count; |
| 598 | q->count += p->count; |
| 599 | *pp = p->next; |
| 600 | break; |
| 601 | } |
| 602 | if (q == NULL) |
| 603 | pp = &p->next; |
| 604 | } |
| 605 | *pp = edir->dyn_relocs; |
| 606 | } |
| 607 | |
| 608 | edir->dyn_relocs = eind->dyn_relocs; |
| 609 | eind->dyn_relocs = NULL; |
| 610 | } |
| 611 | |
| 612 | if (ind->root.type == bfd_link_hash_indirect |
| 613 | && dir->got.refcount <= 0) |
| 614 | { |
| 615 | edir->tls_type = eind->tls_type; |
| 616 | eind->tls_type = GOT_UNKNOWN; |
| 617 | } |
| 618 | |
| 619 | _bfd_elf_link_hash_copy_indirect (bed, dir, ind); |
| 620 | } |
| 621 | |
| 622 | static bfd_boolean |
| 623 | elf64_x86_64_mkobject (abfd) |
| 624 | bfd *abfd; |
| 625 | { |
| 626 | bfd_size_type amt = sizeof (struct elf64_x86_64_obj_tdata); |
| 627 | abfd->tdata.any = bfd_zalloc (abfd, amt); |
| 628 | if (abfd->tdata.any == NULL) |
| 629 | return FALSE; |
| 630 | return TRUE; |
| 631 | } |
| 632 | |
| 633 | static bfd_boolean |
| 634 | elf64_x86_64_elf_object_p (abfd) |
| 635 | bfd *abfd; |
| 636 | { |
| 637 | /* Allocate our special target data. */ |
| 638 | struct elf64_x86_64_obj_tdata *new_tdata; |
| 639 | bfd_size_type amt = sizeof (struct elf64_x86_64_obj_tdata); |
| 640 | new_tdata = bfd_zalloc (abfd, amt); |
| 641 | if (new_tdata == NULL) |
| 642 | return FALSE; |
| 643 | new_tdata->root = *abfd->tdata.elf_obj_data; |
| 644 | abfd->tdata.any = new_tdata; |
| 645 | /* Set the right machine number for an x86-64 elf64 file. */ |
| 646 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64); |
| 647 | return TRUE; |
| 648 | } |
| 649 | |
| 650 | static int |
| 651 | elf64_x86_64_tls_transition (info, r_type, is_local) |
| 652 | struct bfd_link_info *info; |
| 653 | int r_type; |
| 654 | int is_local; |
| 655 | { |
| 656 | if (info->shared) |
| 657 | return r_type; |
| 658 | |
| 659 | switch (r_type) |
| 660 | { |
| 661 | case R_X86_64_TLSGD: |
| 662 | case R_X86_64_GOTTPOFF: |
| 663 | if (is_local) |
| 664 | return R_X86_64_TPOFF32; |
| 665 | return R_X86_64_GOTTPOFF; |
| 666 | case R_X86_64_TLSLD: |
| 667 | return R_X86_64_TPOFF32; |
| 668 | } |
| 669 | |
| 670 | return r_type; |
| 671 | } |
| 672 | |
| 673 | /* Look through the relocs for a section during the first phase, and |
| 674 | calculate needed space in the global offset table, procedure |
| 675 | linkage table, and dynamic reloc sections. */ |
| 676 | |
| 677 | static bfd_boolean |
| 678 | elf64_x86_64_check_relocs (abfd, info, sec, relocs) |
| 679 | bfd *abfd; |
| 680 | struct bfd_link_info *info; |
| 681 | asection *sec; |
| 682 | const Elf_Internal_Rela *relocs; |
| 683 | { |
| 684 | struct elf64_x86_64_link_hash_table *htab; |
| 685 | Elf_Internal_Shdr *symtab_hdr; |
| 686 | struct elf_link_hash_entry **sym_hashes; |
| 687 | const Elf_Internal_Rela *rel; |
| 688 | const Elf_Internal_Rela *rel_end; |
| 689 | asection *sreloc; |
| 690 | |
| 691 | if (info->relocateable) |
| 692 | return TRUE; |
| 693 | |
| 694 | htab = elf64_x86_64_hash_table (info); |
| 695 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 696 | sym_hashes = elf_sym_hashes (abfd); |
| 697 | |
| 698 | sreloc = NULL; |
| 699 | |
| 700 | rel_end = relocs + sec->reloc_count; |
| 701 | for (rel = relocs; rel < rel_end; rel++) |
| 702 | { |
| 703 | unsigned int r_type; |
| 704 | unsigned long r_symndx; |
| 705 | struct elf_link_hash_entry *h; |
| 706 | |
| 707 | r_symndx = ELF64_R_SYM (rel->r_info); |
| 708 | r_type = ELF64_R_TYPE (rel->r_info); |
| 709 | |
| 710 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) |
| 711 | { |
| 712 | (*_bfd_error_handler) (_("%s: bad symbol index: %d"), |
| 713 | bfd_archive_filename (abfd), |
| 714 | r_symndx); |
| 715 | return FALSE; |
| 716 | } |
| 717 | |
| 718 | if (r_symndx < symtab_hdr->sh_info) |
| 719 | h = NULL; |
| 720 | else |
| 721 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 722 | |
| 723 | r_type = elf64_x86_64_tls_transition (info, r_type, h == NULL); |
| 724 | switch (r_type) |
| 725 | { |
| 726 | case R_X86_64_TLSLD: |
| 727 | htab->tls_ld_got.refcount += 1; |
| 728 | goto create_got; |
| 729 | |
| 730 | case R_X86_64_TPOFF32: |
| 731 | if (info->shared) |
| 732 | { |
| 733 | (*_bfd_error_handler) |
| 734 | (_("%s: relocation %s can not be used when making a shared object; recompile with -fPIC"), |
| 735 | bfd_archive_filename (abfd), |
| 736 | x86_64_elf_howto_table[r_type].name); |
| 737 | bfd_set_error (bfd_error_bad_value); |
| 738 | return FALSE; |
| 739 | } |
| 740 | break; |
| 741 | |
| 742 | case R_X86_64_GOTTPOFF: |
| 743 | if (info->shared) |
| 744 | info->flags |= DF_STATIC_TLS; |
| 745 | /* Fall through */ |
| 746 | |
| 747 | case R_X86_64_GOT32: |
| 748 | case R_X86_64_GOTPCREL: |
| 749 | case R_X86_64_TLSGD: |
| 750 | /* This symbol requires a global offset table entry. */ |
| 751 | { |
| 752 | int tls_type, old_tls_type; |
| 753 | |
| 754 | switch (r_type) |
| 755 | { |
| 756 | default: tls_type = GOT_NORMAL; break; |
| 757 | case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break; |
| 758 | case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break; |
| 759 | } |
| 760 | |
| 761 | if (h != NULL) |
| 762 | { |
| 763 | h->got.refcount += 1; |
| 764 | old_tls_type = elf64_x86_64_hash_entry (h)->tls_type; |
| 765 | } |
| 766 | else |
| 767 | { |
| 768 | bfd_signed_vma *local_got_refcounts; |
| 769 | |
| 770 | /* This is a global offset table entry for a local symbol. */ |
| 771 | local_got_refcounts = elf_local_got_refcounts (abfd); |
| 772 | if (local_got_refcounts == NULL) |
| 773 | { |
| 774 | bfd_size_type size; |
| 775 | |
| 776 | size = symtab_hdr->sh_info; |
| 777 | size *= sizeof (bfd_signed_vma) + sizeof (char); |
| 778 | local_got_refcounts = ((bfd_signed_vma *) |
| 779 | bfd_zalloc (abfd, size)); |
| 780 | if (local_got_refcounts == NULL) |
| 781 | return FALSE; |
| 782 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
| 783 | elf64_x86_64_local_got_tls_type (abfd) |
| 784 | = (char *) (local_got_refcounts + symtab_hdr->sh_info); |
| 785 | } |
| 786 | local_got_refcounts[r_symndx] += 1; |
| 787 | old_tls_type |
| 788 | = elf64_x86_64_local_got_tls_type (abfd) [r_symndx]; |
| 789 | } |
| 790 | |
| 791 | /* If a TLS symbol is accessed using IE at least once, |
| 792 | there is no point to use dynamic model for it. */ |
| 793 | if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN |
| 794 | && (old_tls_type != GOT_TLS_GD || tls_type != GOT_TLS_IE)) |
| 795 | { |
| 796 | if (old_tls_type == GOT_TLS_IE && tls_type == GOT_TLS_GD) |
| 797 | tls_type = old_tls_type; |
| 798 | else |
| 799 | { |
| 800 | (*_bfd_error_handler) |
| 801 | (_("%s: %s' accessed both as normal and thread local symbol"), |
| 802 | bfd_archive_filename (abfd), |
| 803 | h ? h->root.root.string : "<local>"); |
| 804 | return FALSE; |
| 805 | } |
| 806 | } |
| 807 | |
| 808 | if (old_tls_type != tls_type) |
| 809 | { |
| 810 | if (h != NULL) |
| 811 | elf64_x86_64_hash_entry (h)->tls_type = tls_type; |
| 812 | else |
| 813 | elf64_x86_64_local_got_tls_type (abfd) [r_symndx] = tls_type; |
| 814 | } |
| 815 | } |
| 816 | /* Fall through */ |
| 817 | |
| 818 | //case R_X86_64_GOTPCREL: |
| 819 | create_got: |
| 820 | if (htab->sgot == NULL) |
| 821 | { |
| 822 | if (htab->elf.dynobj == NULL) |
| 823 | htab->elf.dynobj = abfd; |
| 824 | if (!create_got_section (htab->elf.dynobj, info)) |
| 825 | return FALSE; |
| 826 | } |
| 827 | break; |
| 828 | |
| 829 | case R_X86_64_PLT32: |
| 830 | /* This symbol requires a procedure linkage table entry. We |
| 831 | actually build the entry in adjust_dynamic_symbol, |
| 832 | because this might be a case of linking PIC code which is |
| 833 | never referenced by a dynamic object, in which case we |
| 834 | don't need to generate a procedure linkage table entry |
| 835 | after all. */ |
| 836 | |
| 837 | /* If this is a local symbol, we resolve it directly without |
| 838 | creating a procedure linkage table entry. */ |
| 839 | if (h == NULL) |
| 840 | continue; |
| 841 | |
| 842 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; |
| 843 | h->plt.refcount += 1; |
| 844 | break; |
| 845 | |
| 846 | case R_X86_64_8: |
| 847 | case R_X86_64_16: |
| 848 | case R_X86_64_32: |
| 849 | case R_X86_64_32S: |
| 850 | /* Let's help debug shared library creation. These relocs |
| 851 | cannot be used in shared libs. Don't error out for |
| 852 | sections we don't care about, such as debug sections or |
| 853 | non-constant sections. */ |
| 854 | if (info->shared |
| 855 | && (sec->flags & SEC_ALLOC) != 0 |
| 856 | && (sec->flags & SEC_READONLY) != 0) |
| 857 | { |
| 858 | (*_bfd_error_handler) |
| 859 | (_("%s: relocation %s can not be used when making a shared object; recompile with -fPIC"), |
| 860 | bfd_archive_filename (abfd), |
| 861 | x86_64_elf_howto_table[r_type].name); |
| 862 | bfd_set_error (bfd_error_bad_value); |
| 863 | return FALSE; |
| 864 | } |
| 865 | /* Fall through. */ |
| 866 | |
| 867 | case R_X86_64_PC8: |
| 868 | case R_X86_64_PC16: |
| 869 | case R_X86_64_PC32: |
| 870 | case R_X86_64_64: |
| 871 | if (h != NULL && !info->shared) |
| 872 | { |
| 873 | /* If this reloc is in a read-only section, we might |
| 874 | need a copy reloc. We can't check reliably at this |
| 875 | stage whether the section is read-only, as input |
| 876 | sections have not yet been mapped to output sections. |
| 877 | Tentatively set the flag for now, and correct in |
| 878 | adjust_dynamic_symbol. */ |
| 879 | h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF; |
| 880 | |
| 881 | /* We may need a .plt entry if the function this reloc |
| 882 | refers to is in a shared lib. */ |
| 883 | h->plt.refcount += 1; |
| 884 | } |
| 885 | |
| 886 | /* If we are creating a shared library, and this is a reloc |
| 887 | against a global symbol, or a non PC relative reloc |
| 888 | against a local symbol, then we need to copy the reloc |
| 889 | into the shared library. However, if we are linking with |
| 890 | -Bsymbolic, we do not need to copy a reloc against a |
| 891 | global symbol which is defined in an object we are |
| 892 | including in the link (i.e., DEF_REGULAR is set). At |
| 893 | this point we have not seen all the input files, so it is |
| 894 | possible that DEF_REGULAR is not set now but will be set |
| 895 | later (it is never cleared). In case of a weak definition, |
| 896 | DEF_REGULAR may be cleared later by a strong definition in |
| 897 | a shared library. We account for that possibility below by |
| 898 | storing information in the relocs_copied field of the hash |
| 899 | table entry. A similar situation occurs when creating |
| 900 | shared libraries and symbol visibility changes render the |
| 901 | symbol local. |
| 902 | |
| 903 | If on the other hand, we are creating an executable, we |
| 904 | may need to keep relocations for symbols satisfied by a |
| 905 | dynamic library if we manage to avoid copy relocs for the |
| 906 | symbol. */ |
| 907 | if ((info->shared |
| 908 | && (sec->flags & SEC_ALLOC) != 0 |
| 909 | && (((r_type != R_X86_64_PC8) |
| 910 | && (r_type != R_X86_64_PC16) |
| 911 | && (r_type != R_X86_64_PC32)) |
| 912 | || (h != NULL |
| 913 | && (! info->symbolic |
| 914 | || h->root.type == bfd_link_hash_defweak |
| 915 | || (h->elf_link_hash_flags |
| 916 | & ELF_LINK_HASH_DEF_REGULAR) == 0)))) |
| 917 | || (!info->shared |
| 918 | && (sec->flags & SEC_ALLOC) != 0 |
| 919 | && h != NULL |
| 920 | && (h->root.type == bfd_link_hash_defweak |
| 921 | || (h->elf_link_hash_flags |
| 922 | & ELF_LINK_HASH_DEF_REGULAR) == 0))) |
| 923 | { |
| 924 | struct elf64_x86_64_dyn_relocs *p; |
| 925 | struct elf64_x86_64_dyn_relocs **head; |
| 926 | |
| 927 | /* We must copy these reloc types into the output file. |
| 928 | Create a reloc section in dynobj and make room for |
| 929 | this reloc. */ |
| 930 | if (sreloc == NULL) |
| 931 | { |
| 932 | const char *name; |
| 933 | bfd *dynobj; |
| 934 | |
| 935 | name = (bfd_elf_string_from_elf_section |
| 936 | (abfd, |
| 937 | elf_elfheader (abfd)->e_shstrndx, |
| 938 | elf_section_data (sec)->rel_hdr.sh_name)); |
| 939 | if (name == NULL) |
| 940 | return FALSE; |
| 941 | |
| 942 | if (strncmp (name, ".rela", 5) != 0 |
| 943 | || strcmp (bfd_get_section_name (abfd, sec), |
| 944 | name + 5) != 0) |
| 945 | { |
| 946 | (*_bfd_error_handler) |
| 947 | (_("%s: bad relocation section name `%s\'"), |
| 948 | bfd_archive_filename (abfd), name); |
| 949 | } |
| 950 | |
| 951 | if (htab->elf.dynobj == NULL) |
| 952 | htab->elf.dynobj = abfd; |
| 953 | |
| 954 | dynobj = htab->elf.dynobj; |
| 955 | |
| 956 | sreloc = bfd_get_section_by_name (dynobj, name); |
| 957 | if (sreloc == NULL) |
| 958 | { |
| 959 | flagword flags; |
| 960 | |
| 961 | sreloc = bfd_make_section (dynobj, name); |
| 962 | flags = (SEC_HAS_CONTENTS | SEC_READONLY |
| 963 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| 964 | if ((sec->flags & SEC_ALLOC) != 0) |
| 965 | flags |= SEC_ALLOC | SEC_LOAD; |
| 966 | if (sreloc == NULL |
| 967 | || ! bfd_set_section_flags (dynobj, sreloc, flags) |
| 968 | || ! bfd_set_section_alignment (dynobj, sreloc, 3)) |
| 969 | return FALSE; |
| 970 | } |
| 971 | elf_section_data (sec)->sreloc = sreloc; |
| 972 | } |
| 973 | |
| 974 | /* If this is a global symbol, we count the number of |
| 975 | relocations we need for this symbol. */ |
| 976 | if (h != NULL) |
| 977 | { |
| 978 | head = &((struct elf64_x86_64_link_hash_entry *) h)->dyn_relocs; |
| 979 | } |
| 980 | else |
| 981 | { |
| 982 | /* Track dynamic relocs needed for local syms too. |
| 983 | We really need local syms available to do this |
| 984 | easily. Oh well. */ |
| 985 | |
| 986 | asection *s; |
| 987 | s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, |
| 988 | sec, r_symndx); |
| 989 | if (s == NULL) |
| 990 | return FALSE; |
| 991 | |
| 992 | head = ((struct elf64_x86_64_dyn_relocs **) |
| 993 | &elf_section_data (s)->local_dynrel); |
| 994 | } |
| 995 | |
| 996 | p = *head; |
| 997 | if (p == NULL || p->sec != sec) |
| 998 | { |
| 999 | bfd_size_type amt = sizeof *p; |
| 1000 | p = ((struct elf64_x86_64_dyn_relocs *) |
| 1001 | bfd_alloc (htab->elf.dynobj, amt)); |
| 1002 | if (p == NULL) |
| 1003 | return FALSE; |
| 1004 | p->next = *head; |
| 1005 | *head = p; |
| 1006 | p->sec = sec; |
| 1007 | p->count = 0; |
| 1008 | p->pc_count = 0; |
| 1009 | } |
| 1010 | |
| 1011 | p->count += 1; |
| 1012 | if (r_type == R_X86_64_PC8 |
| 1013 | || r_type == R_X86_64_PC16 |
| 1014 | || r_type == R_X86_64_PC32) |
| 1015 | p->pc_count += 1; |
| 1016 | } |
| 1017 | break; |
| 1018 | |
| 1019 | /* This relocation describes the C++ object vtable hierarchy. |
| 1020 | Reconstruct it for later use during GC. */ |
| 1021 | case R_X86_64_GNU_VTINHERIT: |
| 1022 | if (!_bfd_elf64_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
| 1023 | return FALSE; |
| 1024 | break; |
| 1025 | |
| 1026 | /* This relocation describes which C++ vtable entries are actually |
| 1027 | used. Record for later use during GC. */ |
| 1028 | case R_X86_64_GNU_VTENTRY: |
| 1029 | if (!_bfd_elf64_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
| 1030 | return FALSE; |
| 1031 | break; |
| 1032 | |
| 1033 | default: |
| 1034 | break; |
| 1035 | } |
| 1036 | } |
| 1037 | |
| 1038 | return TRUE; |
| 1039 | } |
| 1040 | |
| 1041 | /* Return the section that should be marked against GC for a given |
| 1042 | relocation. */ |
| 1043 | |
| 1044 | static asection * |
| 1045 | elf64_x86_64_gc_mark_hook (sec, info, rel, h, sym) |
| 1046 | asection *sec; |
| 1047 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
| 1048 | Elf_Internal_Rela *rel; |
| 1049 | struct elf_link_hash_entry *h; |
| 1050 | Elf_Internal_Sym *sym; |
| 1051 | { |
| 1052 | if (h != NULL) |
| 1053 | { |
| 1054 | switch (ELF64_R_TYPE (rel->r_info)) |
| 1055 | { |
| 1056 | case R_X86_64_GNU_VTINHERIT: |
| 1057 | case R_X86_64_GNU_VTENTRY: |
| 1058 | break; |
| 1059 | |
| 1060 | default: |
| 1061 | switch (h->root.type) |
| 1062 | { |
| 1063 | case bfd_link_hash_defined: |
| 1064 | case bfd_link_hash_defweak: |
| 1065 | return h->root.u.def.section; |
| 1066 | |
| 1067 | case bfd_link_hash_common: |
| 1068 | return h->root.u.c.p->section; |
| 1069 | |
| 1070 | default: |
| 1071 | break; |
| 1072 | } |
| 1073 | } |
| 1074 | } |
| 1075 | else |
| 1076 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); |
| 1077 | |
| 1078 | return NULL; |
| 1079 | } |
| 1080 | |
| 1081 | /* Update the got entry reference counts for the section being removed. */ |
| 1082 | |
| 1083 | static bfd_boolean |
| 1084 | elf64_x86_64_gc_sweep_hook (abfd, info, sec, relocs) |
| 1085 | bfd *abfd; |
| 1086 | struct bfd_link_info *info; |
| 1087 | asection *sec; |
| 1088 | const Elf_Internal_Rela *relocs; |
| 1089 | { |
| 1090 | Elf_Internal_Shdr *symtab_hdr; |
| 1091 | struct elf_link_hash_entry **sym_hashes; |
| 1092 | bfd_signed_vma *local_got_refcounts; |
| 1093 | const Elf_Internal_Rela *rel, *relend; |
| 1094 | |
| 1095 | elf_section_data (sec)->local_dynrel = NULL; |
| 1096 | |
| 1097 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 1098 | sym_hashes = elf_sym_hashes (abfd); |
| 1099 | local_got_refcounts = elf_local_got_refcounts (abfd); |
| 1100 | |
| 1101 | relend = relocs + sec->reloc_count; |
| 1102 | for (rel = relocs; rel < relend; rel++) |
| 1103 | { |
| 1104 | unsigned long r_symndx; |
| 1105 | unsigned int r_type; |
| 1106 | struct elf_link_hash_entry *h = NULL; |
| 1107 | |
| 1108 | r_symndx = ELF64_R_SYM (rel->r_info); |
| 1109 | if (r_symndx >= symtab_hdr->sh_info) |
| 1110 | { |
| 1111 | struct elf64_x86_64_link_hash_entry *eh; |
| 1112 | struct elf64_x86_64_dyn_relocs **pp; |
| 1113 | struct elf64_x86_64_dyn_relocs *p; |
| 1114 | |
| 1115 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 1116 | eh = (struct elf64_x86_64_link_hash_entry *) h; |
| 1117 | |
| 1118 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) |
| 1119 | if (p->sec == sec) |
| 1120 | { |
| 1121 | /* Everything must go for SEC. */ |
| 1122 | *pp = p->next; |
| 1123 | break; |
| 1124 | } |
| 1125 | } |
| 1126 | |
| 1127 | r_type = ELF64_R_TYPE (rel->r_info); |
| 1128 | r_type = elf64_x86_64_tls_transition (info, r_type, h != NULL); |
| 1129 | switch (r_type) |
| 1130 | { |
| 1131 | case R_X86_64_TLSLD: |
| 1132 | if (elf64_x86_64_hash_table (info)->tls_ld_got.refcount > 0) |
| 1133 | elf64_x86_64_hash_table (info)->tls_ld_got.refcount -= 1; |
| 1134 | break; |
| 1135 | |
| 1136 | case R_X86_64_TLSGD: |
| 1137 | case R_X86_64_GOTTPOFF: |
| 1138 | case R_X86_64_GOT32: |
| 1139 | case R_X86_64_GOTPCREL: |
| 1140 | if (h != NULL) |
| 1141 | { |
| 1142 | if (h->got.refcount > 0) |
| 1143 | h->got.refcount -= 1; |
| 1144 | } |
| 1145 | else if (local_got_refcounts != NULL) |
| 1146 | { |
| 1147 | if (local_got_refcounts[r_symndx] > 0) |
| 1148 | local_got_refcounts[r_symndx] -= 1; |
| 1149 | } |
| 1150 | break; |
| 1151 | |
| 1152 | case R_X86_64_8: |
| 1153 | case R_X86_64_16: |
| 1154 | case R_X86_64_32: |
| 1155 | case R_X86_64_64: |
| 1156 | case R_X86_64_32S: |
| 1157 | case R_X86_64_PC8: |
| 1158 | case R_X86_64_PC16: |
| 1159 | case R_X86_64_PC32: |
| 1160 | if (info->shared) |
| 1161 | break; |
| 1162 | /* Fall thru */ |
| 1163 | |
| 1164 | case R_X86_64_PLT32: |
| 1165 | if (h != NULL) |
| 1166 | { |
| 1167 | if (h->plt.refcount > 0) |
| 1168 | h->plt.refcount -= 1; |
| 1169 | } |
| 1170 | break; |
| 1171 | |
| 1172 | default: |
| 1173 | break; |
| 1174 | } |
| 1175 | } |
| 1176 | |
| 1177 | return TRUE; |
| 1178 | } |
| 1179 | |
| 1180 | /* Adjust a symbol defined by a dynamic object and referenced by a |
| 1181 | regular object. The current definition is in some section of the |
| 1182 | dynamic object, but we're not including those sections. We have to |
| 1183 | change the definition to something the rest of the link can |
| 1184 | understand. */ |
| 1185 | |
| 1186 | static bfd_boolean |
| 1187 | elf64_x86_64_adjust_dynamic_symbol (info, h) |
| 1188 | struct bfd_link_info *info; |
| 1189 | struct elf_link_hash_entry *h; |
| 1190 | { |
| 1191 | struct elf64_x86_64_link_hash_table *htab; |
| 1192 | struct elf64_x86_64_link_hash_entry * eh; |
| 1193 | struct elf64_x86_64_dyn_relocs *p; |
| 1194 | asection *s; |
| 1195 | unsigned int power_of_two; |
| 1196 | |
| 1197 | /* If this is a function, put it in the procedure linkage table. We |
| 1198 | will fill in the contents of the procedure linkage table later, |
| 1199 | when we know the address of the .got section. */ |
| 1200 | if (h->type == STT_FUNC |
| 1201 | || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) |
| 1202 | { |
| 1203 | if (h->plt.refcount <= 0 |
| 1204 | || (! info->shared |
| 1205 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 |
| 1206 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0 |
| 1207 | && h->root.type != bfd_link_hash_undefweak |
| 1208 | && h->root.type != bfd_link_hash_undefined)) |
| 1209 | { |
| 1210 | /* This case can occur if we saw a PLT32 reloc in an input |
| 1211 | file, but the symbol was never referred to by a dynamic |
| 1212 | object, or if all references were garbage collected. In |
| 1213 | such a case, we don't actually need to build a procedure |
| 1214 | linkage table, and we can just do a PC32 reloc instead. */ |
| 1215 | h->plt.offset = (bfd_vma) -1; |
| 1216 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; |
| 1217 | } |
| 1218 | |
| 1219 | return TRUE; |
| 1220 | } |
| 1221 | else |
| 1222 | /* It's possible that we incorrectly decided a .plt reloc was |
| 1223 | needed for an R_X86_64_PC32 reloc to a non-function sym in |
| 1224 | check_relocs. We can't decide accurately between function and |
| 1225 | non-function syms in check-relocs; Objects loaded later in |
| 1226 | the link may change h->type. So fix it now. */ |
| 1227 | h->plt.offset = (bfd_vma) -1; |
| 1228 | |
| 1229 | /* If this is a weak symbol, and there is a real definition, the |
| 1230 | processor independent code will have arranged for us to see the |
| 1231 | real definition first, and we can just use the same value. */ |
| 1232 | if (h->weakdef != NULL) |
| 1233 | { |
| 1234 | BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined |
| 1235 | || h->weakdef->root.type == bfd_link_hash_defweak); |
| 1236 | h->root.u.def.section = h->weakdef->root.u.def.section; |
| 1237 | h->root.u.def.value = h->weakdef->root.u.def.value; |
| 1238 | return TRUE; |
| 1239 | } |
| 1240 | |
| 1241 | /* This is a reference to a symbol defined by a dynamic object which |
| 1242 | is not a function. */ |
| 1243 | |
| 1244 | /* If we are creating a shared library, we must presume that the |
| 1245 | only references to the symbol are via the global offset table. |
| 1246 | For such cases we need not do anything here; the relocations will |
| 1247 | be handled correctly by relocate_section. */ |
| 1248 | if (info->shared) |
| 1249 | return TRUE; |
| 1250 | |
| 1251 | /* If there are no references to this symbol that do not use the |
| 1252 | GOT, we don't need to generate a copy reloc. */ |
| 1253 | if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0) |
| 1254 | return TRUE; |
| 1255 | |
| 1256 | /* If -z nocopyreloc was given, we won't generate them either. */ |
| 1257 | if (info->nocopyreloc) |
| 1258 | { |
| 1259 | h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF; |
| 1260 | return TRUE; |
| 1261 | } |
| 1262 | |
| 1263 | eh = (struct elf64_x86_64_link_hash_entry *) h; |
| 1264 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
| 1265 | { |
| 1266 | s = p->sec->output_section; |
| 1267 | if (s != NULL && (s->flags & SEC_READONLY) != 0) |
| 1268 | break; |
| 1269 | } |
| 1270 | |
| 1271 | /* If we didn't find any dynamic relocs in read-only sections, then |
| 1272 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ |
| 1273 | if (p == NULL) |
| 1274 | { |
| 1275 | h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF; |
| 1276 | return TRUE; |
| 1277 | } |
| 1278 | |
| 1279 | /* We must allocate the symbol in our .dynbss section, which will |
| 1280 | become part of the .bss section of the executable. There will be |
| 1281 | an entry for this symbol in the .dynsym section. The dynamic |
| 1282 | object will contain position independent code, so all references |
| 1283 | from the dynamic object to this symbol will go through the global |
| 1284 | offset table. The dynamic linker will use the .dynsym entry to |
| 1285 | determine the address it must put in the global offset table, so |
| 1286 | both the dynamic object and the regular object will refer to the |
| 1287 | same memory location for the variable. */ |
| 1288 | |
| 1289 | htab = elf64_x86_64_hash_table (info); |
| 1290 | |
| 1291 | /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker |
| 1292 | to copy the initial value out of the dynamic object and into the |
| 1293 | runtime process image. */ |
| 1294 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
| 1295 | { |
| 1296 | htab->srelbss->_raw_size += sizeof (Elf64_External_Rela); |
| 1297 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; |
| 1298 | } |
| 1299 | |
| 1300 | /* We need to figure out the alignment required for this symbol. I |
| 1301 | have no idea how ELF linkers handle this. 16-bytes is the size |
| 1302 | of the largest type that requires hard alignment -- long double. */ |
| 1303 | /* FIXME: This is VERY ugly. Should be fixed for all architectures using |
| 1304 | this construct. */ |
| 1305 | power_of_two = bfd_log2 (h->size); |
| 1306 | if (power_of_two > 4) |
| 1307 | power_of_two = 4; |
| 1308 | |
| 1309 | /* Apply the required alignment. */ |
| 1310 | s = htab->sdynbss; |
| 1311 | s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two)); |
| 1312 | if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s)) |
| 1313 | { |
| 1314 | if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two)) |
| 1315 | return FALSE; |
| 1316 | } |
| 1317 | |
| 1318 | /* Define the symbol as being at this point in the section. */ |
| 1319 | h->root.u.def.section = s; |
| 1320 | h->root.u.def.value = s->_raw_size; |
| 1321 | |
| 1322 | /* Increment the section size to make room for the symbol. */ |
| 1323 | s->_raw_size += h->size; |
| 1324 | |
| 1325 | return TRUE; |
| 1326 | } |
| 1327 | |
| 1328 | /* This is the condition under which elf64_x86_64_finish_dynamic_symbol |
| 1329 | will be called from elflink.h. If elflink.h doesn't call our |
| 1330 | finish_dynamic_symbol routine, we'll need to do something about |
| 1331 | initializing any .plt and .got entries in elf64_x86_64_relocate_section. */ |
| 1332 | #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, INFO, H) \ |
| 1333 | ((DYN) \ |
| 1334 | && ((INFO)->shared \ |
| 1335 | || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \ |
| 1336 | && ((H)->dynindx != -1 \ |
| 1337 | || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0)) |
| 1338 | |
| 1339 | /* Allocate space in .plt, .got and associated reloc sections for |
| 1340 | dynamic relocs. */ |
| 1341 | |
| 1342 | static bfd_boolean |
| 1343 | allocate_dynrelocs (h, inf) |
| 1344 | struct elf_link_hash_entry *h; |
| 1345 | PTR inf; |
| 1346 | { |
| 1347 | struct bfd_link_info *info; |
| 1348 | struct elf64_x86_64_link_hash_table *htab; |
| 1349 | struct elf64_x86_64_link_hash_entry *eh; |
| 1350 | struct elf64_x86_64_dyn_relocs *p; |
| 1351 | |
| 1352 | if (h->root.type == bfd_link_hash_indirect) |
| 1353 | return TRUE; |
| 1354 | |
| 1355 | if (h->root.type == bfd_link_hash_warning) |
| 1356 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 1357 | |
| 1358 | info = (struct bfd_link_info *) inf; |
| 1359 | htab = elf64_x86_64_hash_table (info); |
| 1360 | |
| 1361 | if (htab->elf.dynamic_sections_created |
| 1362 | && h->plt.refcount > 0) |
| 1363 | { |
| 1364 | /* Make sure this symbol is output as a dynamic symbol. |
| 1365 | Undefined weak syms won't yet be marked as dynamic. */ |
| 1366 | if (h->dynindx == -1 |
| 1367 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) |
| 1368 | { |
| 1369 | if (! bfd_elf64_link_record_dynamic_symbol (info, h)) |
| 1370 | return FALSE; |
| 1371 | } |
| 1372 | |
| 1373 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info, h)) |
| 1374 | { |
| 1375 | asection *s = htab->splt; |
| 1376 | |
| 1377 | /* If this is the first .plt entry, make room for the special |
| 1378 | first entry. */ |
| 1379 | if (s->_raw_size == 0) |
| 1380 | s->_raw_size += PLT_ENTRY_SIZE; |
| 1381 | |
| 1382 | h->plt.offset = s->_raw_size; |
| 1383 | |
| 1384 | /* If this symbol is not defined in a regular file, and we are |
| 1385 | not generating a shared library, then set the symbol to this |
| 1386 | location in the .plt. This is required to make function |
| 1387 | pointers compare as equal between the normal executable and |
| 1388 | the shared library. */ |
| 1389 | if (! info->shared |
| 1390 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) |
| 1391 | { |
| 1392 | h->root.u.def.section = s; |
| 1393 | h->root.u.def.value = h->plt.offset; |
| 1394 | } |
| 1395 | |
| 1396 | /* Make room for this entry. */ |
| 1397 | s->_raw_size += PLT_ENTRY_SIZE; |
| 1398 | |
| 1399 | /* We also need to make an entry in the .got.plt section, which |
| 1400 | will be placed in the .got section by the linker script. */ |
| 1401 | htab->sgotplt->_raw_size += GOT_ENTRY_SIZE; |
| 1402 | |
| 1403 | /* We also need to make an entry in the .rela.plt section. */ |
| 1404 | htab->srelplt->_raw_size += sizeof (Elf64_External_Rela); |
| 1405 | } |
| 1406 | else |
| 1407 | { |
| 1408 | h->plt.offset = (bfd_vma) -1; |
| 1409 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; |
| 1410 | } |
| 1411 | } |
| 1412 | else |
| 1413 | { |
| 1414 | h->plt.offset = (bfd_vma) -1; |
| 1415 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; |
| 1416 | } |
| 1417 | |
| 1418 | /* If R_X86_64_GOTTPOFF symbol is now local to the binary, |
| 1419 | make it a R_X86_64_TPOFF32 requiring no GOT entry. */ |
| 1420 | if (h->got.refcount > 0 |
| 1421 | && !info->shared |
| 1422 | && h->dynindx == -1 |
| 1423 | && elf64_x86_64_hash_entry (h)->tls_type == GOT_TLS_IE) |
| 1424 | h->got.offset = (bfd_vma) -1; |
| 1425 | else if (h->got.refcount > 0) |
| 1426 | { |
| 1427 | asection *s; |
| 1428 | bfd_boolean dyn; |
| 1429 | int tls_type = elf64_x86_64_hash_entry (h)->tls_type; |
| 1430 | |
| 1431 | /* Make sure this symbol is output as a dynamic symbol. |
| 1432 | Undefined weak syms won't yet be marked as dynamic. */ |
| 1433 | if (h->dynindx == -1 |
| 1434 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) |
| 1435 | { |
| 1436 | if (! bfd_elf64_link_record_dynamic_symbol (info, h)) |
| 1437 | return FALSE; |
| 1438 | } |
| 1439 | |
| 1440 | s = htab->sgot; |
| 1441 | h->got.offset = s->_raw_size; |
| 1442 | s->_raw_size += GOT_ENTRY_SIZE; |
| 1443 | /* R_X86_64_TLSGD needs 2 consecutive GOT slots. */ |
| 1444 | if (tls_type == GOT_TLS_GD) |
| 1445 | s->_raw_size += GOT_ENTRY_SIZE; |
| 1446 | dyn = htab->elf.dynamic_sections_created; |
| 1447 | /* R_X86_64_TLSGD needs one dynamic relocation if local symbol |
| 1448 | and two if global. |
| 1449 | R_X86_64_GOTTPOFF needs one dynamic relocation. */ |
| 1450 | if ((tls_type == GOT_TLS_GD && h->dynindx == -1) |
| 1451 | || tls_type == GOT_TLS_IE) |
| 1452 | htab->srelgot->_raw_size += sizeof (Elf64_External_Rela); |
| 1453 | else if (tls_type == GOT_TLS_GD) |
| 1454 | htab->srelgot->_raw_size += 2 * sizeof (Elf64_External_Rela); |
| 1455 | else if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h)) |
| 1456 | htab->srelgot->_raw_size += sizeof (Elf64_External_Rela); |
| 1457 | } |
| 1458 | else |
| 1459 | h->got.offset = (bfd_vma) -1; |
| 1460 | |
| 1461 | eh = (struct elf64_x86_64_link_hash_entry *) h; |
| 1462 | if (eh->dyn_relocs == NULL) |
| 1463 | return TRUE; |
| 1464 | |
| 1465 | /* In the shared -Bsymbolic case, discard space allocated for |
| 1466 | dynamic pc-relative relocs against symbols which turn out to be |
| 1467 | defined in regular objects. For the normal shared case, discard |
| 1468 | space for pc-relative relocs that have become local due to symbol |
| 1469 | visibility changes. */ |
| 1470 | |
| 1471 | if (info->shared) |
| 1472 | { |
| 1473 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 |
| 1474 | && ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0 |
| 1475 | || info->symbolic)) |
| 1476 | { |
| 1477 | struct elf64_x86_64_dyn_relocs **pp; |
| 1478 | |
| 1479 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) |
| 1480 | { |
| 1481 | p->count -= p->pc_count; |
| 1482 | p->pc_count = 0; |
| 1483 | if (p->count == 0) |
| 1484 | *pp = p->next; |
| 1485 | else |
| 1486 | pp = &p->next; |
| 1487 | } |
| 1488 | } |
| 1489 | } |
| 1490 | else |
| 1491 | { |
| 1492 | /* For the non-shared case, discard space for relocs against |
| 1493 | symbols which turn out to need copy relocs or are not |
| 1494 | dynamic. */ |
| 1495 | |
| 1496 | if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 |
| 1497 | && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 |
| 1498 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) |
| 1499 | || (htab->elf.dynamic_sections_created |
| 1500 | && (h->root.type == bfd_link_hash_undefweak |
| 1501 | || h->root.type == bfd_link_hash_undefined)))) |
| 1502 | { |
| 1503 | /* Make sure this symbol is output as a dynamic symbol. |
| 1504 | Undefined weak syms won't yet be marked as dynamic. */ |
| 1505 | if (h->dynindx == -1 |
| 1506 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) |
| 1507 | { |
| 1508 | if (! bfd_elf64_link_record_dynamic_symbol (info, h)) |
| 1509 | return FALSE; |
| 1510 | } |
| 1511 | |
| 1512 | /* If that succeeded, we know we'll be keeping all the |
| 1513 | relocs. */ |
| 1514 | if (h->dynindx != -1) |
| 1515 | goto keep; |
| 1516 | } |
| 1517 | |
| 1518 | eh->dyn_relocs = NULL; |
| 1519 | |
| 1520 | keep: ; |
| 1521 | } |
| 1522 | |
| 1523 | /* Finally, allocate space. */ |
| 1524 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
| 1525 | { |
| 1526 | asection *sreloc = elf_section_data (p->sec)->sreloc; |
| 1527 | sreloc->_raw_size += p->count * sizeof (Elf64_External_Rela); |
| 1528 | } |
| 1529 | |
| 1530 | return TRUE; |
| 1531 | } |
| 1532 | |
| 1533 | /* Find any dynamic relocs that apply to read-only sections. */ |
| 1534 | |
| 1535 | static bfd_boolean |
| 1536 | readonly_dynrelocs (h, inf) |
| 1537 | struct elf_link_hash_entry *h; |
| 1538 | PTR inf; |
| 1539 | { |
| 1540 | struct elf64_x86_64_link_hash_entry *eh; |
| 1541 | struct elf64_x86_64_dyn_relocs *p; |
| 1542 | |
| 1543 | if (h->root.type == bfd_link_hash_warning) |
| 1544 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 1545 | |
| 1546 | eh = (struct elf64_x86_64_link_hash_entry *) h; |
| 1547 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
| 1548 | { |
| 1549 | asection *s = p->sec->output_section; |
| 1550 | |
| 1551 | if (s != NULL && (s->flags & SEC_READONLY) != 0) |
| 1552 | { |
| 1553 | struct bfd_link_info *info = (struct bfd_link_info *) inf; |
| 1554 | |
| 1555 | info->flags |= DF_TEXTREL; |
| 1556 | |
| 1557 | /* Not an error, just cut short the traversal. */ |
| 1558 | return FALSE; |
| 1559 | } |
| 1560 | } |
| 1561 | return TRUE; |
| 1562 | } |
| 1563 | |
| 1564 | /* Set the sizes of the dynamic sections. */ |
| 1565 | |
| 1566 | static bfd_boolean |
| 1567 | elf64_x86_64_size_dynamic_sections (output_bfd, info) |
| 1568 | bfd *output_bfd ATTRIBUTE_UNUSED; |
| 1569 | struct bfd_link_info *info; |
| 1570 | { |
| 1571 | struct elf64_x86_64_link_hash_table *htab; |
| 1572 | bfd *dynobj; |
| 1573 | asection *s; |
| 1574 | bfd_boolean relocs; |
| 1575 | bfd *ibfd; |
| 1576 | |
| 1577 | htab = elf64_x86_64_hash_table (info); |
| 1578 | dynobj = htab->elf.dynobj; |
| 1579 | if (dynobj == NULL) |
| 1580 | abort (); |
| 1581 | |
| 1582 | if (htab->elf.dynamic_sections_created) |
| 1583 | { |
| 1584 | /* Set the contents of the .interp section to the interpreter. */ |
| 1585 | if (! info->shared) |
| 1586 | { |
| 1587 | s = bfd_get_section_by_name (dynobj, ".interp"); |
| 1588 | if (s == NULL) |
| 1589 | abort (); |
| 1590 | s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; |
| 1591 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
| 1592 | } |
| 1593 | } |
| 1594 | |
| 1595 | /* Set up .got offsets for local syms, and space for local dynamic |
| 1596 | relocs. */ |
| 1597 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) |
| 1598 | { |
| 1599 | bfd_signed_vma *local_got; |
| 1600 | bfd_signed_vma *end_local_got; |
| 1601 | char *local_tls_type; |
| 1602 | bfd_size_type locsymcount; |
| 1603 | Elf_Internal_Shdr *symtab_hdr; |
| 1604 | asection *srel; |
| 1605 | |
| 1606 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) |
| 1607 | continue; |
| 1608 | |
| 1609 | for (s = ibfd->sections; s != NULL; s = s->next) |
| 1610 | { |
| 1611 | struct elf64_x86_64_dyn_relocs *p; |
| 1612 | |
| 1613 | for (p = *((struct elf64_x86_64_dyn_relocs **) |
| 1614 | &elf_section_data (s)->local_dynrel); |
| 1615 | p != NULL; |
| 1616 | p = p->next) |
| 1617 | { |
| 1618 | if (!bfd_is_abs_section (p->sec) |
| 1619 | && bfd_is_abs_section (p->sec->output_section)) |
| 1620 | { |
| 1621 | /* Input section has been discarded, either because |
| 1622 | it is a copy of a linkonce section or due to |
| 1623 | linker script /DISCARD/, so we'll be discarding |
| 1624 | the relocs too. */ |
| 1625 | } |
| 1626 | else if (p->count != 0) |
| 1627 | { |
| 1628 | srel = elf_section_data (p->sec)->sreloc; |
| 1629 | srel->_raw_size += p->count * sizeof (Elf64_External_Rela); |
| 1630 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) |
| 1631 | info->flags |= DF_TEXTREL; |
| 1632 | |
| 1633 | } |
| 1634 | } |
| 1635 | } |
| 1636 | |
| 1637 | local_got = elf_local_got_refcounts (ibfd); |
| 1638 | if (!local_got) |
| 1639 | continue; |
| 1640 | |
| 1641 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; |
| 1642 | locsymcount = symtab_hdr->sh_info; |
| 1643 | end_local_got = local_got + locsymcount; |
| 1644 | local_tls_type = elf64_x86_64_local_got_tls_type (ibfd); |
| 1645 | s = htab->sgot; |
| 1646 | srel = htab->srelgot; |
| 1647 | for (; local_got < end_local_got; ++local_got, ++local_tls_type) |
| 1648 | { |
| 1649 | if (*local_got > 0) |
| 1650 | { |
| 1651 | *local_got = s->_raw_size; |
| 1652 | s->_raw_size += GOT_ENTRY_SIZE; |
| 1653 | if (*local_tls_type == GOT_TLS_GD) |
| 1654 | s->_raw_size += GOT_ENTRY_SIZE; |
| 1655 | if (info->shared |
| 1656 | || *local_tls_type == GOT_TLS_GD |
| 1657 | || *local_tls_type == GOT_TLS_IE) |
| 1658 | srel->_raw_size += sizeof (Elf64_External_Rela); |
| 1659 | } |
| 1660 | else |
| 1661 | *local_got = (bfd_vma) -1; |
| 1662 | } |
| 1663 | } |
| 1664 | |
| 1665 | if (htab->tls_ld_got.refcount > 0) |
| 1666 | { |
| 1667 | /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD |
| 1668 | relocs. */ |
| 1669 | htab->tls_ld_got.offset = htab->sgot->_raw_size; |
| 1670 | htab->sgot->_raw_size += 2 * GOT_ENTRY_SIZE; |
| 1671 | htab->srelgot->_raw_size += sizeof (Elf64_External_Rela); |
| 1672 | } |
| 1673 | else |
| 1674 | htab->tls_ld_got.offset = -1; |
| 1675 | |
| 1676 | /* Allocate global sym .plt and .got entries, and space for global |
| 1677 | sym dynamic relocs. */ |
| 1678 | elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info); |
| 1679 | |
| 1680 | /* We now have determined the sizes of the various dynamic sections. |
| 1681 | Allocate memory for them. */ |
| 1682 | relocs = FALSE; |
| 1683 | for (s = dynobj->sections; s != NULL; s = s->next) |
| 1684 | { |
| 1685 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
| 1686 | continue; |
| 1687 | |
| 1688 | if (s == htab->splt |
| 1689 | || s == htab->sgot |
| 1690 | || s == htab->sgotplt) |
| 1691 | { |
| 1692 | /* Strip this section if we don't need it; see the |
| 1693 | comment below. */ |
| 1694 | } |
| 1695 | else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0) |
| 1696 | { |
| 1697 | if (s->_raw_size != 0 && s != htab->srelplt) |
| 1698 | relocs = TRUE; |
| 1699 | |
| 1700 | /* We use the reloc_count field as a counter if we need |
| 1701 | to copy relocs into the output file. */ |
| 1702 | s->reloc_count = 0; |
| 1703 | } |
| 1704 | else |
| 1705 | { |
| 1706 | /* It's not one of our sections, so don't allocate space. */ |
| 1707 | continue; |
| 1708 | } |
| 1709 | |
| 1710 | if (s->_raw_size == 0) |
| 1711 | { |
| 1712 | /* If we don't need this section, strip it from the |
| 1713 | output file. This is mostly to handle .rela.bss and |
| 1714 | .rela.plt. We must create both sections in |
| 1715 | create_dynamic_sections, because they must be created |
| 1716 | before the linker maps input sections to output |
| 1717 | sections. The linker does that before |
| 1718 | adjust_dynamic_symbol is called, and it is that |
| 1719 | function which decides whether anything needs to go |
| 1720 | into these sections. */ |
| 1721 | |
| 1722 | _bfd_strip_section_from_output (info, s); |
| 1723 | continue; |
| 1724 | } |
| 1725 | |
| 1726 | /* Allocate memory for the section contents. We use bfd_zalloc |
| 1727 | here in case unused entries are not reclaimed before the |
| 1728 | section's contents are written out. This should not happen, |
| 1729 | but this way if it does, we get a R_X86_64_NONE reloc instead |
| 1730 | of garbage. */ |
| 1731 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size); |
| 1732 | if (s->contents == NULL) |
| 1733 | return FALSE; |
| 1734 | } |
| 1735 | |
| 1736 | if (htab->elf.dynamic_sections_created) |
| 1737 | { |
| 1738 | /* Add some entries to the .dynamic section. We fill in the |
| 1739 | values later, in elf64_x86_64_finish_dynamic_sections, but we |
| 1740 | must add the entries now so that we get the correct size for |
| 1741 | the .dynamic section. The DT_DEBUG entry is filled in by the |
| 1742 | dynamic linker and used by the debugger. */ |
| 1743 | #define add_dynamic_entry(TAG, VAL) \ |
| 1744 | bfd_elf64_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL)) |
| 1745 | |
| 1746 | if (! info->shared) |
| 1747 | { |
| 1748 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
| 1749 | return FALSE; |
| 1750 | } |
| 1751 | |
| 1752 | if (htab->splt->_raw_size != 0) |
| 1753 | { |
| 1754 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
| 1755 | || !add_dynamic_entry (DT_PLTRELSZ, 0) |
| 1756 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) |
| 1757 | || !add_dynamic_entry (DT_JMPREL, 0)) |
| 1758 | return FALSE; |
| 1759 | } |
| 1760 | |
| 1761 | if (relocs) |
| 1762 | { |
| 1763 | if (!add_dynamic_entry (DT_RELA, 0) |
| 1764 | || !add_dynamic_entry (DT_RELASZ, 0) |
| 1765 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela))) |
| 1766 | return FALSE; |
| 1767 | |
| 1768 | /* If any dynamic relocs apply to a read-only section, |
| 1769 | then we need a DT_TEXTREL entry. */ |
| 1770 | if ((info->flags & DF_TEXTREL) == 0) |
| 1771 | elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, |
| 1772 | (PTR) info); |
| 1773 | |
| 1774 | if ((info->flags & DF_TEXTREL) != 0) |
| 1775 | { |
| 1776 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
| 1777 | return FALSE; |
| 1778 | } |
| 1779 | } |
| 1780 | } |
| 1781 | #undef add_dynamic_entry |
| 1782 | |
| 1783 | return TRUE; |
| 1784 | } |
| 1785 | |
| 1786 | /* Return the base VMA address which should be subtracted from real addresses |
| 1787 | when resolving @dtpoff relocation. |
| 1788 | This is PT_TLS segment p_vaddr. */ |
| 1789 | |
| 1790 | static bfd_vma |
| 1791 | dtpoff_base (info) |
| 1792 | struct bfd_link_info *info; |
| 1793 | { |
| 1794 | /* If tls_segment is NULL, we should have signalled an error already. */ |
| 1795 | if (elf_hash_table (info)->tls_segment == NULL) |
| 1796 | return 0; |
| 1797 | return elf_hash_table (info)->tls_segment->start; |
| 1798 | } |
| 1799 | |
| 1800 | /* Return the relocation value for @tpoff relocation |
| 1801 | if STT_TLS virtual address is ADDRESS. */ |
| 1802 | |
| 1803 | static bfd_vma |
| 1804 | tpoff (info, address) |
| 1805 | struct bfd_link_info *info; |
| 1806 | bfd_vma address; |
| 1807 | { |
| 1808 | struct elf_link_tls_segment *tls_segment |
| 1809 | = elf_hash_table (info)->tls_segment; |
| 1810 | |
| 1811 | /* If tls_segment is NULL, we should have signalled an error already. */ |
| 1812 | if (tls_segment == NULL) |
| 1813 | return 0; |
| 1814 | return address - align_power (tls_segment->size, tls_segment->align) |
| 1815 | - tls_segment->start; |
| 1816 | } |
| 1817 | |
| 1818 | /* Relocate an x86_64 ELF section. */ |
| 1819 | |
| 1820 | static bfd_boolean |
| 1821 | elf64_x86_64_relocate_section (output_bfd, info, input_bfd, input_section, |
| 1822 | contents, relocs, local_syms, local_sections) |
| 1823 | bfd *output_bfd; |
| 1824 | struct bfd_link_info *info; |
| 1825 | bfd *input_bfd; |
| 1826 | asection *input_section; |
| 1827 | bfd_byte *contents; |
| 1828 | Elf_Internal_Rela *relocs; |
| 1829 | Elf_Internal_Sym *local_syms; |
| 1830 | asection **local_sections; |
| 1831 | { |
| 1832 | struct elf64_x86_64_link_hash_table *htab; |
| 1833 | Elf_Internal_Shdr *symtab_hdr; |
| 1834 | struct elf_link_hash_entry **sym_hashes; |
| 1835 | bfd_vma *local_got_offsets; |
| 1836 | Elf_Internal_Rela *rel; |
| 1837 | Elf_Internal_Rela *relend; |
| 1838 | |
| 1839 | if (info->relocateable) |
| 1840 | return TRUE; |
| 1841 | |
| 1842 | htab = elf64_x86_64_hash_table (info); |
| 1843 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 1844 | sym_hashes = elf_sym_hashes (input_bfd); |
| 1845 | local_got_offsets = elf_local_got_offsets (input_bfd); |
| 1846 | |
| 1847 | rel = relocs; |
| 1848 | relend = relocs + input_section->reloc_count; |
| 1849 | for (; rel < relend; rel++) |
| 1850 | { |
| 1851 | unsigned int r_type; |
| 1852 | reloc_howto_type *howto; |
| 1853 | unsigned long r_symndx; |
| 1854 | struct elf_link_hash_entry *h; |
| 1855 | Elf_Internal_Sym *sym; |
| 1856 | asection *sec; |
| 1857 | bfd_vma off; |
| 1858 | bfd_vma relocation; |
| 1859 | bfd_boolean unresolved_reloc; |
| 1860 | bfd_reloc_status_type r; |
| 1861 | int tls_type; |
| 1862 | |
| 1863 | r_type = ELF64_R_TYPE (rel->r_info); |
| 1864 | if (r_type == (int) R_X86_64_GNU_VTINHERIT |
| 1865 | || r_type == (int) R_X86_64_GNU_VTENTRY) |
| 1866 | continue; |
| 1867 | |
| 1868 | if (r_type >= R_X86_64_max) |
| 1869 | { |
| 1870 | bfd_set_error (bfd_error_bad_value); |
| 1871 | return FALSE; |
| 1872 | } |
| 1873 | |
| 1874 | howto = x86_64_elf_howto_table + r_type; |
| 1875 | r_symndx = ELF64_R_SYM (rel->r_info); |
| 1876 | h = NULL; |
| 1877 | sym = NULL; |
| 1878 | sec = NULL; |
| 1879 | unresolved_reloc = FALSE; |
| 1880 | if (r_symndx < symtab_hdr->sh_info) |
| 1881 | { |
| 1882 | sym = local_syms + r_symndx; |
| 1883 | sec = local_sections[r_symndx]; |
| 1884 | |
| 1885 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel); |
| 1886 | } |
| 1887 | else |
| 1888 | { |
| 1889 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 1890 | while (h->root.type == bfd_link_hash_indirect |
| 1891 | || h->root.type == bfd_link_hash_warning) |
| 1892 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 1893 | |
| 1894 | if (h->root.type == bfd_link_hash_defined |
| 1895 | || h->root.type == bfd_link_hash_defweak) |
| 1896 | { |
| 1897 | sec = h->root.u.def.section; |
| 1898 | if (sec->output_section == NULL) |
| 1899 | { |
| 1900 | /* Set a flag that will be cleared later if we find a |
| 1901 | relocation value for this symbol. output_section |
| 1902 | is typically NULL for symbols satisfied by a shared |
| 1903 | library. */ |
| 1904 | unresolved_reloc = TRUE; |
| 1905 | relocation = 0; |
| 1906 | } |
| 1907 | else |
| 1908 | relocation = (h->root.u.def.value |
| 1909 | + sec->output_section->vma |
| 1910 | + sec->output_offset); |
| 1911 | } |
| 1912 | else if (h->root.type == bfd_link_hash_undefweak) |
| 1913 | relocation = 0; |
| 1914 | else if (info->shared |
| 1915 | && !info->no_undefined |
| 1916 | && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) |
| 1917 | relocation = 0; |
| 1918 | else |
| 1919 | { |
| 1920 | if (! ((*info->callbacks->undefined_symbol) |
| 1921 | (info, h->root.root.string, input_bfd, |
| 1922 | input_section, rel->r_offset, |
| 1923 | (!info->shared || info->no_undefined |
| 1924 | || ELF_ST_VISIBILITY (h->other))))) |
| 1925 | return FALSE; |
| 1926 | relocation = 0; |
| 1927 | } |
| 1928 | } |
| 1929 | /* When generating a shared object, the relocations handled here are |
| 1930 | copied into the output file to be resolved at run time. */ |
| 1931 | switch (r_type) |
| 1932 | { |
| 1933 | case R_X86_64_GOT32: |
| 1934 | /* Relocation is to the entry for this symbol in the global |
| 1935 | offset table. */ |
| 1936 | case R_X86_64_GOTPCREL: |
| 1937 | /* Use global offset table as symbol value. */ |
| 1938 | if (htab->sgot == NULL) |
| 1939 | abort (); |
| 1940 | |
| 1941 | if (h != NULL) |
| 1942 | { |
| 1943 | bfd_boolean dyn; |
| 1944 | |
| 1945 | off = h->got.offset; |
| 1946 | dyn = htab->elf.dynamic_sections_created; |
| 1947 | |
| 1948 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h) |
| 1949 | || (info->shared |
| 1950 | && (info->symbolic |
| 1951 | || h->dynindx == -1 |
| 1952 | || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL)) |
| 1953 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))) |
| 1954 | { |
| 1955 | /* This is actually a static link, or it is a -Bsymbolic |
| 1956 | link and the symbol is defined locally, or the symbol |
| 1957 | was forced to be local because of a version file. We |
| 1958 | must initialize this entry in the global offset table. |
| 1959 | Since the offset must always be a multiple of 8, we |
| 1960 | use the least significant bit to record whether we |
| 1961 | have initialized it already. |
| 1962 | |
| 1963 | When doing a dynamic link, we create a .rela.got |
| 1964 | relocation entry to initialize the value. This is |
| 1965 | done in the finish_dynamic_symbol routine. */ |
| 1966 | if ((off & 1) != 0) |
| 1967 | off &= ~1; |
| 1968 | else |
| 1969 | { |
| 1970 | bfd_put_64 (output_bfd, relocation, |
| 1971 | htab->sgot->contents + off); |
| 1972 | h->got.offset |= 1; |
| 1973 | } |
| 1974 | } |
| 1975 | else |
| 1976 | unresolved_reloc = FALSE; |
| 1977 | } |
| 1978 | else |
| 1979 | { |
| 1980 | if (local_got_offsets == NULL) |
| 1981 | abort (); |
| 1982 | |
| 1983 | off = local_got_offsets[r_symndx]; |
| 1984 | |
| 1985 | /* The offset must always be a multiple of 8. We use |
| 1986 | the least significant bit to record whether we have |
| 1987 | already generated the necessary reloc. */ |
| 1988 | if ((off & 1) != 0) |
| 1989 | off &= ~1; |
| 1990 | else |
| 1991 | { |
| 1992 | bfd_put_64 (output_bfd, relocation, |
| 1993 | htab->sgot->contents + off); |
| 1994 | |
| 1995 | if (info->shared) |
| 1996 | { |
| 1997 | asection *s; |
| 1998 | Elf_Internal_Rela outrel; |
| 1999 | bfd_byte *loc; |
| 2000 | |
| 2001 | /* We need to generate a R_X86_64_RELATIVE reloc |
| 2002 | for the dynamic linker. */ |
| 2003 | s = htab->srelgot; |
| 2004 | if (s == NULL) |
| 2005 | abort (); |
| 2006 | |
| 2007 | outrel.r_offset = (htab->sgot->output_section->vma |
| 2008 | + htab->sgot->output_offset |
| 2009 | + off); |
| 2010 | outrel.r_info = ELF64_R_INFO (0, R_X86_64_RELATIVE); |
| 2011 | outrel.r_addend = relocation; |
| 2012 | loc = s->contents; |
| 2013 | loc += s->reloc_count++ * sizeof (Elf64_External_Rela); |
| 2014 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
| 2015 | } |
| 2016 | |
| 2017 | local_got_offsets[r_symndx] |= 1; |
| 2018 | } |
| 2019 | } |
| 2020 | |
| 2021 | if (off >= (bfd_vma) -2) |
| 2022 | abort (); |
| 2023 | |
| 2024 | relocation = htab->sgot->output_offset + off; |
| 2025 | if (r_type == R_X86_64_GOTPCREL) |
| 2026 | relocation += htab->sgot->output_section->vma; |
| 2027 | |
| 2028 | break; |
| 2029 | |
| 2030 | case R_X86_64_PLT32: |
| 2031 | /* Relocation is to the entry for this symbol in the |
| 2032 | procedure linkage table. */ |
| 2033 | |
| 2034 | /* Resolve a PLT32 reloc against a local symbol directly, |
| 2035 | without using the procedure linkage table. */ |
| 2036 | if (h == NULL) |
| 2037 | break; |
| 2038 | |
| 2039 | if (h->plt.offset == (bfd_vma) -1 |
| 2040 | || htab->splt == NULL) |
| 2041 | { |
| 2042 | /* We didn't make a PLT entry for this symbol. This |
| 2043 | happens when statically linking PIC code, or when |
| 2044 | using -Bsymbolic. */ |
| 2045 | break; |
| 2046 | } |
| 2047 | |
| 2048 | relocation = (htab->splt->output_section->vma |
| 2049 | + htab->splt->output_offset |
| 2050 | + h->plt.offset); |
| 2051 | unresolved_reloc = FALSE; |
| 2052 | break; |
| 2053 | |
| 2054 | case R_X86_64_PC8: |
| 2055 | case R_X86_64_PC16: |
| 2056 | case R_X86_64_PC32: |
| 2057 | case R_X86_64_8: |
| 2058 | case R_X86_64_16: |
| 2059 | case R_X86_64_32: |
| 2060 | case R_X86_64_64: |
| 2061 | /* FIXME: The ABI says the linker should make sure the value is |
| 2062 | the same when it's zeroextended to 64 bit. */ |
| 2063 | |
| 2064 | /* r_symndx will be zero only for relocs against symbols |
| 2065 | from removed linkonce sections, or sections discarded by |
| 2066 | a linker script. */ |
| 2067 | if (r_symndx == 0 |
| 2068 | || (input_section->flags & SEC_ALLOC) == 0) |
| 2069 | break; |
| 2070 | |
| 2071 | if ((info->shared |
| 2072 | && ((r_type != R_X86_64_PC8 |
| 2073 | && r_type != R_X86_64_PC16 |
| 2074 | && r_type != R_X86_64_PC32) |
| 2075 | || (h != NULL |
| 2076 | && h->dynindx != -1 |
| 2077 | && (! info->symbolic |
| 2078 | || (h->elf_link_hash_flags |
| 2079 | & ELF_LINK_HASH_DEF_REGULAR) == 0)))) |
| 2080 | || (!info->shared |
| 2081 | && h != NULL |
| 2082 | && h->dynindx != -1 |
| 2083 | && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 |
| 2084 | && (((h->elf_link_hash_flags |
| 2085 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0 |
| 2086 | && (h->elf_link_hash_flags |
| 2087 | & ELF_LINK_HASH_DEF_REGULAR) == 0) |
| 2088 | || h->root.type == bfd_link_hash_undefweak |
| 2089 | || h->root.type == bfd_link_hash_undefined))) |
| 2090 | { |
| 2091 | Elf_Internal_Rela outrel; |
| 2092 | bfd_byte *loc; |
| 2093 | bfd_boolean skip, relocate; |
| 2094 | asection *sreloc; |
| 2095 | |
| 2096 | /* When generating a shared object, these relocations |
| 2097 | are copied into the output file to be resolved at run |
| 2098 | time. */ |
| 2099 | skip = FALSE; |
| 2100 | relocate = FALSE; |
| 2101 | |
| 2102 | outrel.r_offset = |
| 2103 | _bfd_elf_section_offset (output_bfd, info, input_section, |
| 2104 | rel->r_offset); |
| 2105 | if (outrel.r_offset == (bfd_vma) -1) |
| 2106 | skip = TRUE; |
| 2107 | else if (outrel.r_offset == (bfd_vma) -2) |
| 2108 | skip = TRUE, relocate = TRUE; |
| 2109 | |
| 2110 | outrel.r_offset += (input_section->output_section->vma |
| 2111 | + input_section->output_offset); |
| 2112 | |
| 2113 | if (skip) |
| 2114 | memset (&outrel, 0, sizeof outrel); |
| 2115 | |
| 2116 | /* h->dynindx may be -1 if this symbol was marked to |
| 2117 | become local. */ |
| 2118 | else if (h != NULL |
| 2119 | && h->dynindx != -1 |
| 2120 | && (r_type == R_X86_64_PC8 |
| 2121 | || r_type == R_X86_64_PC16 |
| 2122 | || r_type == R_X86_64_PC32 |
| 2123 | || !info->shared |
| 2124 | || !info->symbolic |
| 2125 | || (h->elf_link_hash_flags |
| 2126 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) |
| 2127 | { |
| 2128 | outrel.r_info = ELF64_R_INFO (h->dynindx, r_type); |
| 2129 | outrel.r_addend = rel->r_addend; |
| 2130 | } |
| 2131 | else |
| 2132 | { |
| 2133 | /* This symbol is local, or marked to become local. */ |
| 2134 | if (r_type == R_X86_64_64) |
| 2135 | { |
| 2136 | relocate = TRUE; |
| 2137 | outrel.r_info = ELF64_R_INFO (0, R_X86_64_RELATIVE); |
| 2138 | outrel.r_addend = relocation + rel->r_addend; |
| 2139 | } |
| 2140 | else |
| 2141 | { |
| 2142 | long sindx; |
| 2143 | |
| 2144 | if (h == NULL) |
| 2145 | sec = local_sections[r_symndx]; |
| 2146 | else |
| 2147 | { |
| 2148 | BFD_ASSERT (h->root.type == bfd_link_hash_defined |
| 2149 | || (h->root.type |
| 2150 | == bfd_link_hash_defweak)); |
| 2151 | sec = h->root.u.def.section; |
| 2152 | } |
| 2153 | if (sec != NULL && bfd_is_abs_section (sec)) |
| 2154 | sindx = 0; |
| 2155 | else if (sec == NULL || sec->owner == NULL) |
| 2156 | { |
| 2157 | bfd_set_error (bfd_error_bad_value); |
| 2158 | return FALSE; |
| 2159 | } |
| 2160 | else |
| 2161 | { |
| 2162 | asection *osec; |
| 2163 | |
| 2164 | osec = sec->output_section; |
| 2165 | sindx = elf_section_data (osec)->dynindx; |
| 2166 | BFD_ASSERT (sindx > 0); |
| 2167 | } |
| 2168 | |
| 2169 | outrel.r_info = ELF64_R_INFO (sindx, r_type); |
| 2170 | outrel.r_addend = relocation + rel->r_addend; |
| 2171 | } |
| 2172 | } |
| 2173 | |
| 2174 | sreloc = elf_section_data (input_section)->sreloc; |
| 2175 | if (sreloc == NULL) |
| 2176 | abort (); |
| 2177 | |
| 2178 | loc = sreloc->contents; |
| 2179 | loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); |
| 2180 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
| 2181 | |
| 2182 | /* If this reloc is against an external symbol, we do |
| 2183 | not want to fiddle with the addend. Otherwise, we |
| 2184 | need to include the symbol value so that it becomes |
| 2185 | an addend for the dynamic reloc. */ |
| 2186 | if (! relocate) |
| 2187 | continue; |
| 2188 | } |
| 2189 | |
| 2190 | break; |
| 2191 | |
| 2192 | case R_X86_64_TLSGD: |
| 2193 | case R_X86_64_GOTTPOFF: |
| 2194 | r_type = elf64_x86_64_tls_transition (info, r_type, h == NULL); |
| 2195 | tls_type = GOT_UNKNOWN; |
| 2196 | if (h == NULL && local_got_offsets) |
| 2197 | tls_type = elf64_x86_64_local_got_tls_type (input_bfd) [r_symndx]; |
| 2198 | else if (h != NULL) |
| 2199 | { |
| 2200 | tls_type = elf64_x86_64_hash_entry (h)->tls_type; |
| 2201 | if (!info->shared && h->dynindx == -1 && tls_type == GOT_TLS_IE) |
| 2202 | r_type = R_X86_64_TPOFF32; |
| 2203 | } |
| 2204 | if (r_type == R_X86_64_TLSGD) |
| 2205 | { |
| 2206 | if (tls_type == GOT_TLS_IE) |
| 2207 | r_type = R_X86_64_GOTTPOFF; |
| 2208 | } |
| 2209 | |
| 2210 | if (r_type == R_X86_64_TPOFF32) |
| 2211 | { |
| 2212 | BFD_ASSERT (! unresolved_reloc); |
| 2213 | if (ELF64_R_TYPE (rel->r_info) == R_X86_64_TLSGD) |
| 2214 | { |
| 2215 | unsigned int i; |
| 2216 | static unsigned char tlsgd[8] |
| 2217 | = { 0x66, 0x48, 0x8d, 0x3d, 0x66, 0x66, 0x48, 0xe8 }; |
| 2218 | |
| 2219 | /* GD->LE transition. |
| 2220 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
| 2221 | .word 0x6666; rex64; call __tls_get_addr@plt |
| 2222 | Change it into: |
| 2223 | movq %fs:0, %rax |
| 2224 | leaq foo@tpoff(%rax), %rax */ |
| 2225 | BFD_ASSERT (rel->r_offset >= 4); |
| 2226 | for (i = 0; i < 4; i++) |
| 2227 | BFD_ASSERT (bfd_get_8 (input_bfd, |
| 2228 | contents + rel->r_offset - 4 + i) |
| 2229 | == tlsgd[i]); |
| 2230 | BFD_ASSERT (rel->r_offset + 12 <= input_section->_raw_size); |
| 2231 | for (i = 0; i < 4; i++) |
| 2232 | BFD_ASSERT (bfd_get_8 (input_bfd, |
| 2233 | contents + rel->r_offset + 4 + i) |
| 2234 | == tlsgd[i+4]); |
| 2235 | BFD_ASSERT (rel + 1 < relend); |
| 2236 | BFD_ASSERT (ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PLT32); |
| 2237 | memcpy (contents + rel->r_offset - 4, |
| 2238 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", |
| 2239 | 16); |
| 2240 | bfd_put_32 (output_bfd, tpoff (info, relocation), |
| 2241 | contents + rel->r_offset + 8); |
| 2242 | /* Skip R_X86_64_PLT32. */ |
| 2243 | rel++; |
| 2244 | continue; |
| 2245 | } |
| 2246 | else |
| 2247 | { |
| 2248 | unsigned int val, type, reg; |
| 2249 | |
| 2250 | /* IE->LE transition: |
| 2251 | Originally it can be one of: |
| 2252 | movq foo@gottpoff(%rip), %reg |
| 2253 | addq foo@gottpoff(%rip), %reg |
| 2254 | We change it into: |
| 2255 | movq $foo, %reg |
| 2256 | leaq foo(%reg), %reg |
| 2257 | addq $foo, %reg. */ |
| 2258 | BFD_ASSERT (rel->r_offset >= 3); |
| 2259 | val = bfd_get_8 (input_bfd, contents + rel->r_offset - 3); |
| 2260 | BFD_ASSERT (val == 0x48 || val == 0x4c); |
| 2261 | type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2); |
| 2262 | BFD_ASSERT (type == 0x8b || type == 0x03); |
| 2263 | reg = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); |
| 2264 | BFD_ASSERT ((reg & 0xc7) == 5); |
| 2265 | reg >>= 3; |
| 2266 | BFD_ASSERT (rel->r_offset + 4 <= input_section->_raw_size); |
| 2267 | if (type == 0x8b) |
| 2268 | { |
| 2269 | /* movq */ |
| 2270 | if (val == 0x4c) |
| 2271 | bfd_put_8 (output_bfd, 0x49, |
| 2272 | contents + rel->r_offset - 3); |
| 2273 | bfd_put_8 (output_bfd, 0xc7, |
| 2274 | contents + rel->r_offset - 2); |
| 2275 | bfd_put_8 (output_bfd, 0xc0 | reg, |
| 2276 | contents + rel->r_offset - 1); |
| 2277 | } |
| 2278 | else if (reg == 4) |
| 2279 | { |
| 2280 | /* addq -> addq - addressing with %rsp/%r12 is |
| 2281 | special */ |
| 2282 | if (val == 0x4c) |
| 2283 | bfd_put_8 (output_bfd, 0x49, |
| 2284 | contents + rel->r_offset - 3); |
| 2285 | bfd_put_8 (output_bfd, 0x81, |
| 2286 | contents + rel->r_offset - 2); |
| 2287 | bfd_put_8 (output_bfd, 0xc0 | reg, |
| 2288 | contents + rel->r_offset - 1); |
| 2289 | } |
| 2290 | else |
| 2291 | { |
| 2292 | /* addq -> leaq */ |
| 2293 | if (val == 0x4c) |
| 2294 | bfd_put_8 (output_bfd, 0x4d, |
| 2295 | contents + rel->r_offset - 3); |
| 2296 | bfd_put_8 (output_bfd, 0x8d, |
| 2297 | contents + rel->r_offset - 2); |
| 2298 | bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3), |
| 2299 | contents + rel->r_offset - 1); |
| 2300 | } |
| 2301 | bfd_put_32 (output_bfd, tpoff (info, relocation), |
| 2302 | contents + rel->r_offset); |
| 2303 | continue; |
| 2304 | } |
| 2305 | } |
| 2306 | |
| 2307 | if (htab->sgot == NULL) |
| 2308 | abort (); |
| 2309 | |
| 2310 | if (h != NULL) |
| 2311 | off = h->got.offset; |
| 2312 | else |
| 2313 | { |
| 2314 | if (local_got_offsets == NULL) |
| 2315 | abort (); |
| 2316 | |
| 2317 | off = local_got_offsets[r_symndx]; |
| 2318 | } |
| 2319 | |
| 2320 | if ((off & 1) != 0) |
| 2321 | off &= ~1; |
| 2322 | else |
| 2323 | { |
| 2324 | Elf_Internal_Rela outrel; |
| 2325 | bfd_byte *loc; |
| 2326 | int dr_type, indx; |
| 2327 | |
| 2328 | if (htab->srelgot == NULL) |
| 2329 | abort (); |
| 2330 | |
| 2331 | outrel.r_offset = (htab->sgot->output_section->vma |
| 2332 | + htab->sgot->output_offset + off); |
| 2333 | |
| 2334 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
| 2335 | if (r_type == R_X86_64_TLSGD) |
| 2336 | dr_type = R_X86_64_DTPMOD64; |
| 2337 | else |
| 2338 | dr_type = R_X86_64_TPOFF64; |
| 2339 | |
| 2340 | bfd_put_64 (output_bfd, 0, htab->sgot->contents + off); |
| 2341 | outrel.r_addend = 0; |
| 2342 | if (dr_type == R_X86_64_TPOFF64 && indx == 0) |
| 2343 | outrel.r_addend = relocation - dtpoff_base (info); |
| 2344 | outrel.r_info = ELF64_R_INFO (indx, dr_type); |
| 2345 | |
| 2346 | loc = htab->srelgot->contents; |
| 2347 | loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela); |
| 2348 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
| 2349 | |
| 2350 | if (r_type == R_X86_64_TLSGD) |
| 2351 | { |
| 2352 | if (indx == 0) |
| 2353 | { |
| 2354 | BFD_ASSERT (! unresolved_reloc); |
| 2355 | bfd_put_64 (output_bfd, |
| 2356 | relocation - dtpoff_base (info), |
| 2357 | htab->sgot->contents + off + GOT_ENTRY_SIZE); |
| 2358 | } |
| 2359 | else |
| 2360 | { |
| 2361 | bfd_put_64 (output_bfd, 0, |
| 2362 | htab->sgot->contents + off + GOT_ENTRY_SIZE); |
| 2363 | outrel.r_info = ELF64_R_INFO (indx, |
| 2364 | R_X86_64_DTPOFF64); |
| 2365 | outrel.r_offset += GOT_ENTRY_SIZE; |
| 2366 | htab->srelgot->reloc_count++; |
| 2367 | loc += sizeof (Elf64_External_Rela); |
| 2368 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
| 2369 | } |
| 2370 | } |
| 2371 | |
| 2372 | if (h != NULL) |
| 2373 | h->got.offset |= 1; |
| 2374 | else |
| 2375 | local_got_offsets[r_symndx] |= 1; |
| 2376 | } |
| 2377 | |
| 2378 | if (off >= (bfd_vma) -2) |
| 2379 | abort (); |
| 2380 | if (r_type == ELF64_R_TYPE (rel->r_info)) |
| 2381 | { |
| 2382 | relocation = htab->sgot->output_section->vma |
| 2383 | + htab->sgot->output_offset + off; |
| 2384 | unresolved_reloc = FALSE; |
| 2385 | } |
| 2386 | else |
| 2387 | { |
| 2388 | unsigned int i; |
| 2389 | static unsigned char tlsgd[8] |
| 2390 | = { 0x66, 0x48, 0x8d, 0x3d, 0x66, 0x66, 0x48, 0xe8 }; |
| 2391 | |
| 2392 | /* GD->IE transition. |
| 2393 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
| 2394 | .word 0x6666; rex64; call __tls_get_addr@plt |
| 2395 | Change it into: |
| 2396 | movq %fs:0, %rax |
| 2397 | addq foo@gottpoff(%rip), %rax */ |
| 2398 | BFD_ASSERT (rel->r_offset >= 4); |
| 2399 | for (i = 0; i < 4; i++) |
| 2400 | BFD_ASSERT (bfd_get_8 (input_bfd, |
| 2401 | contents + rel->r_offset - 4 + i) |
| 2402 | == tlsgd[i]); |
| 2403 | BFD_ASSERT (rel->r_offset + 12 <= input_section->_raw_size); |
| 2404 | for (i = 0; i < 4; i++) |
| 2405 | BFD_ASSERT (bfd_get_8 (input_bfd, |
| 2406 | contents + rel->r_offset + 4 + i) |
| 2407 | == tlsgd[i+4]); |
| 2408 | BFD_ASSERT (rel + 1 < relend); |
| 2409 | BFD_ASSERT (ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PLT32); |
| 2410 | memcpy (contents + rel->r_offset - 4, |
| 2411 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", |
| 2412 | 16); |
| 2413 | |
| 2414 | relocation = (htab->sgot->output_section->vma |
| 2415 | + htab->sgot->output_offset + off |
| 2416 | - rel->r_offset |
| 2417 | - input_section->output_section->vma |
| 2418 | - input_section->output_offset |
| 2419 | - 12); |
| 2420 | bfd_put_32 (output_bfd, relocation, |
| 2421 | contents + rel->r_offset + 8); |
| 2422 | /* Skip R_X86_64_PLT32. */ |
| 2423 | rel++; |
| 2424 | continue; |
| 2425 | } |
| 2426 | break; |
| 2427 | |
| 2428 | case R_X86_64_TLSLD: |
| 2429 | if (! info->shared) |
| 2430 | { |
| 2431 | /* LD->LE transition: |
| 2432 | Ensure it is: |
| 2433 | leaq foo@tlsld(%rip), %rdi; call __tls_get_addr@plt. |
| 2434 | We change it into: |
| 2435 | .word 0x6666; .byte 0x66; movl %fs:0, %rax. */ |
| 2436 | BFD_ASSERT (rel->r_offset >= 3); |
| 2437 | BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset - 3) |
| 2438 | == 0x48); |
| 2439 | BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset - 2) |
| 2440 | == 0x8d); |
| 2441 | BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset - 1) |
| 2442 | == 0x3d); |
| 2443 | BFD_ASSERT (rel->r_offset + 9 <= input_section->_raw_size); |
| 2444 | BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset + 4) |
| 2445 | == 0xe8); |
| 2446 | BFD_ASSERT (rel + 1 < relend); |
| 2447 | BFD_ASSERT (ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PLT32); |
| 2448 | memcpy (contents + rel->r_offset - 3, |
| 2449 | "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12); |
| 2450 | /* Skip R_X86_64_PLT32. */ |
| 2451 | rel++; |
| 2452 | continue; |
| 2453 | } |
| 2454 | |
| 2455 | if (htab->sgot == NULL) |
| 2456 | abort (); |
| 2457 | |
| 2458 | off = htab->tls_ld_got.offset; |
| 2459 | if (off & 1) |
| 2460 | off &= ~1; |
| 2461 | else |
| 2462 | { |
| 2463 | Elf_Internal_Rela outrel; |
| 2464 | bfd_byte *loc; |
| 2465 | |
| 2466 | if (htab->srelgot == NULL) |
| 2467 | abort (); |
| 2468 | |
| 2469 | outrel.r_offset = (htab->sgot->output_section->vma |
| 2470 | + htab->sgot->output_offset + off); |
| 2471 | |
| 2472 | bfd_put_64 (output_bfd, 0, |
| 2473 | htab->sgot->contents + off); |
| 2474 | bfd_put_64 (output_bfd, 0, |
| 2475 | htab->sgot->contents + off + GOT_ENTRY_SIZE); |
| 2476 | outrel.r_info = ELF64_R_INFO (0, R_X86_64_DTPMOD64); |
| 2477 | outrel.r_addend = 0; |
| 2478 | loc = htab->srelgot->contents; |
| 2479 | loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela); |
| 2480 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
| 2481 | htab->tls_ld_got.offset |= 1; |
| 2482 | } |
| 2483 | relocation = htab->sgot->output_section->vma |
| 2484 | + htab->sgot->output_offset + off; |
| 2485 | unresolved_reloc = FALSE; |
| 2486 | break; |
| 2487 | |
| 2488 | case R_X86_64_DTPOFF32: |
| 2489 | if (info->shared || (input_section->flags & SEC_CODE) == 0) |
| 2490 | relocation -= dtpoff_base (info); |
| 2491 | else |
| 2492 | relocation = tpoff (info, relocation); |
| 2493 | break; |
| 2494 | |
| 2495 | case R_X86_64_TPOFF32: |
| 2496 | BFD_ASSERT (! info->shared); |
| 2497 | relocation = tpoff (info, relocation); |
| 2498 | break; |
| 2499 | |
| 2500 | default: |
| 2501 | break; |
| 2502 | } |
| 2503 | |
| 2504 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
| 2505 | because such sections are not SEC_ALLOC and thus ld.so will |
| 2506 | not process them. */ |
| 2507 | if (unresolved_reloc |
| 2508 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
| 2509 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0)) |
| 2510 | (*_bfd_error_handler) |
| 2511 | (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"), |
| 2512 | bfd_archive_filename (input_bfd), |
| 2513 | bfd_get_section_name (input_bfd, input_section), |
| 2514 | (long) rel->r_offset, |
| 2515 | h->root.root.string); |
| 2516 | |
| 2517 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 2518 | contents, rel->r_offset, |
| 2519 | relocation, rel->r_addend); |
| 2520 | |
| 2521 | if (r != bfd_reloc_ok) |
| 2522 | { |
| 2523 | const char *name; |
| 2524 | |
| 2525 | if (h != NULL) |
| 2526 | name = h->root.root.string; |
| 2527 | else |
| 2528 | { |
| 2529 | name = bfd_elf_string_from_elf_section (input_bfd, |
| 2530 | symtab_hdr->sh_link, |
| 2531 | sym->st_name); |
| 2532 | if (name == NULL) |
| 2533 | return FALSE; |
| 2534 | if (*name == '\0') |
| 2535 | name = bfd_section_name (input_bfd, sec); |
| 2536 | } |
| 2537 | |
| 2538 | if (r == bfd_reloc_overflow) |
| 2539 | { |
| 2540 | |
| 2541 | if (! ((*info->callbacks->reloc_overflow) |
| 2542 | (info, name, howto->name, (bfd_vma) 0, |
| 2543 | input_bfd, input_section, rel->r_offset))) |
| 2544 | return FALSE; |
| 2545 | } |
| 2546 | else |
| 2547 | { |
| 2548 | (*_bfd_error_handler) |
| 2549 | (_("%s(%s+0x%lx): reloc against `%s': error %d"), |
| 2550 | bfd_archive_filename (input_bfd), |
| 2551 | bfd_get_section_name (input_bfd, input_section), |
| 2552 | (long) rel->r_offset, name, (int) r); |
| 2553 | return FALSE; |
| 2554 | } |
| 2555 | } |
| 2556 | } |
| 2557 | |
| 2558 | return TRUE; |
| 2559 | } |
| 2560 | |
| 2561 | /* Finish up dynamic symbol handling. We set the contents of various |
| 2562 | dynamic sections here. */ |
| 2563 | |
| 2564 | static bfd_boolean |
| 2565 | elf64_x86_64_finish_dynamic_symbol (output_bfd, info, h, sym) |
| 2566 | bfd *output_bfd; |
| 2567 | struct bfd_link_info *info; |
| 2568 | struct elf_link_hash_entry *h; |
| 2569 | Elf_Internal_Sym *sym; |
| 2570 | { |
| 2571 | struct elf64_x86_64_link_hash_table *htab; |
| 2572 | |
| 2573 | htab = elf64_x86_64_hash_table (info); |
| 2574 | |
| 2575 | if (h->plt.offset != (bfd_vma) -1) |
| 2576 | { |
| 2577 | bfd_vma plt_index; |
| 2578 | bfd_vma got_offset; |
| 2579 | Elf_Internal_Rela rela; |
| 2580 | bfd_byte *loc; |
| 2581 | |
| 2582 | /* This symbol has an entry in the procedure linkage table. Set |
| 2583 | it up. */ |
| 2584 | if (h->dynindx == -1 |
| 2585 | || htab->splt == NULL |
| 2586 | || htab->sgotplt == NULL |
| 2587 | || htab->srelplt == NULL) |
| 2588 | abort (); |
| 2589 | |
| 2590 | /* Get the index in the procedure linkage table which |
| 2591 | corresponds to this symbol. This is the index of this symbol |
| 2592 | in all the symbols for which we are making plt entries. The |
| 2593 | first entry in the procedure linkage table is reserved. */ |
| 2594 | plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; |
| 2595 | |
| 2596 | /* Get the offset into the .got table of the entry that |
| 2597 | corresponds to this function. Each .got entry is GOT_ENTRY_SIZE |
| 2598 | bytes. The first three are reserved for the dynamic linker. */ |
| 2599 | got_offset = (plt_index + 3) * GOT_ENTRY_SIZE; |
| 2600 | |
| 2601 | /* Fill in the entry in the procedure linkage table. */ |
| 2602 | memcpy (htab->splt->contents + h->plt.offset, elf64_x86_64_plt_entry, |
| 2603 | PLT_ENTRY_SIZE); |
| 2604 | |
| 2605 | /* Insert the relocation positions of the plt section. The magic |
| 2606 | numbers at the end of the statements are the positions of the |
| 2607 | relocations in the plt section. */ |
| 2608 | /* Put offset for jmp *name@GOTPCREL(%rip), since the |
| 2609 | instruction uses 6 bytes, subtract this value. */ |
| 2610 | bfd_put_32 (output_bfd, |
| 2611 | (htab->sgotplt->output_section->vma |
| 2612 | + htab->sgotplt->output_offset |
| 2613 | + got_offset |
| 2614 | - htab->splt->output_section->vma |
| 2615 | - htab->splt->output_offset |
| 2616 | - h->plt.offset |
| 2617 | - 6), |
| 2618 | htab->splt->contents + h->plt.offset + 2); |
| 2619 | /* Put relocation index. */ |
| 2620 | bfd_put_32 (output_bfd, plt_index, |
| 2621 | htab->splt->contents + h->plt.offset + 7); |
| 2622 | /* Put offset for jmp .PLT0. */ |
| 2623 | bfd_put_32 (output_bfd, - (h->plt.offset + PLT_ENTRY_SIZE), |
| 2624 | htab->splt->contents + h->plt.offset + 12); |
| 2625 | |
| 2626 | /* Fill in the entry in the global offset table, initially this |
| 2627 | points to the pushq instruction in the PLT which is at offset 6. */ |
| 2628 | bfd_put_64 (output_bfd, (htab->splt->output_section->vma |
| 2629 | + htab->splt->output_offset |
| 2630 | + h->plt.offset + 6), |
| 2631 | htab->sgotplt->contents + got_offset); |
| 2632 | |
| 2633 | /* Fill in the entry in the .rela.plt section. */ |
| 2634 | rela.r_offset = (htab->sgotplt->output_section->vma |
| 2635 | + htab->sgotplt->output_offset |
| 2636 | + got_offset); |
| 2637 | rela.r_info = ELF64_R_INFO (h->dynindx, R_X86_64_JUMP_SLOT); |
| 2638 | rela.r_addend = 0; |
| 2639 | loc = htab->srelplt->contents + plt_index * sizeof (Elf64_External_Rela); |
| 2640 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
| 2641 | |
| 2642 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) |
| 2643 | { |
| 2644 | /* Mark the symbol as undefined, rather than as defined in |
| 2645 | the .plt section. Leave the value alone. This is a clue |
| 2646 | for the dynamic linker, to make function pointer |
| 2647 | comparisons work between an application and shared |
| 2648 | library. */ |
| 2649 | sym->st_shndx = SHN_UNDEF; |
| 2650 | } |
| 2651 | } |
| 2652 | |
| 2653 | if (h->got.offset != (bfd_vma) -1 |
| 2654 | && elf64_x86_64_hash_entry (h)->tls_type != GOT_TLS_GD |
| 2655 | && elf64_x86_64_hash_entry (h)->tls_type != GOT_TLS_IE) |
| 2656 | { |
| 2657 | Elf_Internal_Rela rela; |
| 2658 | bfd_byte *loc; |
| 2659 | |
| 2660 | /* This symbol has an entry in the global offset table. Set it |
| 2661 | up. */ |
| 2662 | if (htab->sgot == NULL || htab->srelgot == NULL) |
| 2663 | abort (); |
| 2664 | |
| 2665 | rela.r_offset = (htab->sgot->output_section->vma |
| 2666 | + htab->sgot->output_offset |
| 2667 | + (h->got.offset &~ (bfd_vma) 1)); |
| 2668 | |
| 2669 | /* If this is a static link, or it is a -Bsymbolic link and the |
| 2670 | symbol is defined locally or was forced to be local because |
| 2671 | of a version file, we just want to emit a RELATIVE reloc. |
| 2672 | The entry in the global offset table will already have been |
| 2673 | initialized in the relocate_section function. */ |
| 2674 | if (info->shared |
| 2675 | && (info->symbolic |
| 2676 | || h->dynindx == -1 |
| 2677 | || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL)) |
| 2678 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) |
| 2679 | { |
| 2680 | BFD_ASSERT((h->got.offset & 1) != 0); |
| 2681 | rela.r_info = ELF64_R_INFO (0, R_X86_64_RELATIVE); |
| 2682 | rela.r_addend = (h->root.u.def.value |
| 2683 | + h->root.u.def.section->output_section->vma |
| 2684 | + h->root.u.def.section->output_offset); |
| 2685 | } |
| 2686 | else |
| 2687 | { |
| 2688 | BFD_ASSERT((h->got.offset & 1) == 0); |
| 2689 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
| 2690 | htab->sgot->contents + h->got.offset); |
| 2691 | rela.r_info = ELF64_R_INFO (h->dynindx, R_X86_64_GLOB_DAT); |
| 2692 | rela.r_addend = 0; |
| 2693 | } |
| 2694 | |
| 2695 | loc = htab->srelgot->contents; |
| 2696 | loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela); |
| 2697 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
| 2698 | } |
| 2699 | |
| 2700 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) |
| 2701 | { |
| 2702 | Elf_Internal_Rela rela; |
| 2703 | bfd_byte *loc; |
| 2704 | |
| 2705 | /* This symbol needs a copy reloc. Set it up. */ |
| 2706 | |
| 2707 | if (h->dynindx == -1 |
| 2708 | || (h->root.type != bfd_link_hash_defined |
| 2709 | && h->root.type != bfd_link_hash_defweak) |
| 2710 | || htab->srelbss == NULL) |
| 2711 | abort (); |
| 2712 | |
| 2713 | rela.r_offset = (h->root.u.def.value |
| 2714 | + h->root.u.def.section->output_section->vma |
| 2715 | + h->root.u.def.section->output_offset); |
| 2716 | rela.r_info = ELF64_R_INFO (h->dynindx, R_X86_64_COPY); |
| 2717 | rela.r_addend = 0; |
| 2718 | loc = htab->srelbss->contents; |
| 2719 | loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela); |
| 2720 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
| 2721 | } |
| 2722 | |
| 2723 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ |
| 2724 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 |
| 2725 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) |
| 2726 | sym->st_shndx = SHN_ABS; |
| 2727 | |
| 2728 | return TRUE; |
| 2729 | } |
| 2730 | |
| 2731 | /* Used to decide how to sort relocs in an optimal manner for the |
| 2732 | dynamic linker, before writing them out. */ |
| 2733 | |
| 2734 | static enum elf_reloc_type_class |
| 2735 | elf64_x86_64_reloc_type_class (rela) |
| 2736 | const Elf_Internal_Rela *rela; |
| 2737 | { |
| 2738 | switch ((int) ELF64_R_TYPE (rela->r_info)) |
| 2739 | { |
| 2740 | case R_X86_64_RELATIVE: |
| 2741 | return reloc_class_relative; |
| 2742 | case R_X86_64_JUMP_SLOT: |
| 2743 | return reloc_class_plt; |
| 2744 | case R_X86_64_COPY: |
| 2745 | return reloc_class_copy; |
| 2746 | default: |
| 2747 | return reloc_class_normal; |
| 2748 | } |
| 2749 | } |
| 2750 | |
| 2751 | /* Finish up the dynamic sections. */ |
| 2752 | |
| 2753 | static bfd_boolean |
| 2754 | elf64_x86_64_finish_dynamic_sections (output_bfd, info) |
| 2755 | bfd *output_bfd; |
| 2756 | struct bfd_link_info *info; |
| 2757 | { |
| 2758 | struct elf64_x86_64_link_hash_table *htab; |
| 2759 | bfd *dynobj; |
| 2760 | asection *sdyn; |
| 2761 | |
| 2762 | htab = elf64_x86_64_hash_table (info); |
| 2763 | dynobj = htab->elf.dynobj; |
| 2764 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
| 2765 | |
| 2766 | if (htab->elf.dynamic_sections_created) |
| 2767 | { |
| 2768 | Elf64_External_Dyn *dyncon, *dynconend; |
| 2769 | |
| 2770 | if (sdyn == NULL || htab->sgot == NULL) |
| 2771 | abort (); |
| 2772 | |
| 2773 | dyncon = (Elf64_External_Dyn *) sdyn->contents; |
| 2774 | dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size); |
| 2775 | for (; dyncon < dynconend; dyncon++) |
| 2776 | { |
| 2777 | Elf_Internal_Dyn dyn; |
| 2778 | asection *s; |
| 2779 | |
| 2780 | bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); |
| 2781 | |
| 2782 | switch (dyn.d_tag) |
| 2783 | { |
| 2784 | default: |
| 2785 | continue; |
| 2786 | |
| 2787 | case DT_PLTGOT: |
| 2788 | dyn.d_un.d_ptr = htab->sgot->output_section->vma; |
| 2789 | break; |
| 2790 | |
| 2791 | case DT_JMPREL: |
| 2792 | dyn.d_un.d_ptr = htab->srelplt->output_section->vma; |
| 2793 | break; |
| 2794 | |
| 2795 | case DT_PLTRELSZ: |
| 2796 | s = htab->srelplt->output_section; |
| 2797 | if (s->_cooked_size != 0) |
| 2798 | dyn.d_un.d_val = s->_cooked_size; |
| 2799 | else |
| 2800 | dyn.d_un.d_val = s->_raw_size; |
| 2801 | break; |
| 2802 | |
| 2803 | case DT_RELASZ: |
| 2804 | /* The procedure linkage table relocs (DT_JMPREL) should |
| 2805 | not be included in the overall relocs (DT_RELA). |
| 2806 | Therefore, we override the DT_RELASZ entry here to |
| 2807 | make it not include the JMPREL relocs. Since the |
| 2808 | linker script arranges for .rela.plt to follow all |
| 2809 | other relocation sections, we don't have to worry |
| 2810 | about changing the DT_RELA entry. */ |
| 2811 | if (htab->srelplt != NULL) |
| 2812 | { |
| 2813 | s = htab->srelplt->output_section; |
| 2814 | if (s->_cooked_size != 0) |
| 2815 | dyn.d_un.d_val -= s->_cooked_size; |
| 2816 | else |
| 2817 | dyn.d_un.d_val -= s->_raw_size; |
| 2818 | } |
| 2819 | break; |
| 2820 | } |
| 2821 | |
| 2822 | bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 2823 | } |
| 2824 | |
| 2825 | /* Fill in the special first entry in the procedure linkage table. */ |
| 2826 | if (htab->splt && htab->splt->_raw_size > 0) |
| 2827 | { |
| 2828 | /* Fill in the first entry in the procedure linkage table. */ |
| 2829 | memcpy (htab->splt->contents, elf64_x86_64_plt0_entry, |
| 2830 | PLT_ENTRY_SIZE); |
| 2831 | /* Add offset for pushq GOT+8(%rip), since the instruction |
| 2832 | uses 6 bytes subtract this value. */ |
| 2833 | bfd_put_32 (output_bfd, |
| 2834 | (htab->sgotplt->output_section->vma |
| 2835 | + htab->sgotplt->output_offset |
| 2836 | + 8 |
| 2837 | - htab->splt->output_section->vma |
| 2838 | - htab->splt->output_offset |
| 2839 | - 6), |
| 2840 | htab->splt->contents + 2); |
| 2841 | /* Add offset for jmp *GOT+16(%rip). The 12 is the offset to |
| 2842 | the end of the instruction. */ |
| 2843 | bfd_put_32 (output_bfd, |
| 2844 | (htab->sgotplt->output_section->vma |
| 2845 | + htab->sgotplt->output_offset |
| 2846 | + 16 |
| 2847 | - htab->splt->output_section->vma |
| 2848 | - htab->splt->output_offset |
| 2849 | - 12), |
| 2850 | htab->splt->contents + 8); |
| 2851 | |
| 2852 | elf_section_data (htab->splt->output_section)->this_hdr.sh_entsize = |
| 2853 | PLT_ENTRY_SIZE; |
| 2854 | } |
| 2855 | } |
| 2856 | |
| 2857 | if (htab->sgotplt) |
| 2858 | { |
| 2859 | /* Fill in the first three entries in the global offset table. */ |
| 2860 | if (htab->sgotplt->_raw_size > 0) |
| 2861 | { |
| 2862 | /* Set the first entry in the global offset table to the address of |
| 2863 | the dynamic section. */ |
| 2864 | if (sdyn == NULL) |
| 2865 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents); |
| 2866 | else |
| 2867 | bfd_put_64 (output_bfd, |
| 2868 | sdyn->output_section->vma + sdyn->output_offset, |
| 2869 | htab->sgotplt->contents); |
| 2870 | /* Write GOT[1] and GOT[2], needed for the dynamic linker. */ |
| 2871 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + GOT_ENTRY_SIZE); |
| 2872 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + GOT_ENTRY_SIZE*2); |
| 2873 | } |
| 2874 | |
| 2875 | elf_section_data (htab->sgotplt->output_section)->this_hdr.sh_entsize = |
| 2876 | GOT_ENTRY_SIZE; |
| 2877 | } |
| 2878 | |
| 2879 | return TRUE; |
| 2880 | } |
| 2881 | |
| 2882 | |
| 2883 | #define TARGET_LITTLE_SYM bfd_elf64_x86_64_vec |
| 2884 | #define TARGET_LITTLE_NAME "elf64-x86-64" |
| 2885 | #define ELF_ARCH bfd_arch_i386 |
| 2886 | #define ELF_MACHINE_CODE EM_X86_64 |
| 2887 | #define ELF_MAXPAGESIZE 0x100000 |
| 2888 | |
| 2889 | #define elf_backend_can_gc_sections 1 |
| 2890 | #define elf_backend_can_refcount 1 |
| 2891 | #define elf_backend_want_got_plt 1 |
| 2892 | #define elf_backend_plt_readonly 1 |
| 2893 | #define elf_backend_want_plt_sym 0 |
| 2894 | #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3) |
| 2895 | #define elf_backend_plt_header_size PLT_ENTRY_SIZE |
| 2896 | #define elf_backend_rela_normal 1 |
| 2897 | |
| 2898 | #define elf_info_to_howto elf64_x86_64_info_to_howto |
| 2899 | |
| 2900 | #define bfd_elf64_bfd_link_hash_table_create \ |
| 2901 | elf64_x86_64_link_hash_table_create |
| 2902 | #define bfd_elf64_bfd_reloc_type_lookup elf64_x86_64_reloc_type_lookup |
| 2903 | |
| 2904 | #define elf_backend_adjust_dynamic_symbol elf64_x86_64_adjust_dynamic_symbol |
| 2905 | #define elf_backend_check_relocs elf64_x86_64_check_relocs |
| 2906 | #define elf_backend_copy_indirect_symbol elf64_x86_64_copy_indirect_symbol |
| 2907 | #define elf_backend_create_dynamic_sections elf64_x86_64_create_dynamic_sections |
| 2908 | #define elf_backend_finish_dynamic_sections elf64_x86_64_finish_dynamic_sections |
| 2909 | #define elf_backend_finish_dynamic_symbol elf64_x86_64_finish_dynamic_symbol |
| 2910 | #define elf_backend_gc_mark_hook elf64_x86_64_gc_mark_hook |
| 2911 | #define elf_backend_gc_sweep_hook elf64_x86_64_gc_sweep_hook |
| 2912 | #define elf_backend_grok_prstatus elf64_x86_64_grok_prstatus |
| 2913 | #define elf_backend_grok_psinfo elf64_x86_64_grok_psinfo |
| 2914 | #define elf_backend_reloc_type_class elf64_x86_64_reloc_type_class |
| 2915 | #define elf_backend_relocate_section elf64_x86_64_relocate_section |
| 2916 | #define elf_backend_size_dynamic_sections elf64_x86_64_size_dynamic_sections |
| 2917 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
| 2918 | #define bfd_elf64_mkobject elf64_x86_64_mkobject |
| 2919 | |
| 2920 | #include "elf64-target.h" |