| 1 | /* AArch64-specific support for NN-bit ELF. |
| 2 | Copyright (C) 2009-2018 Free Software Foundation, Inc. |
| 3 | Contributed by ARM Ltd. |
| 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 3 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; see the file COPYING3. If not, |
| 19 | see <http://www.gnu.org/licenses/>. */ |
| 20 | |
| 21 | /* Notes on implementation: |
| 22 | |
| 23 | Thread Local Store (TLS) |
| 24 | |
| 25 | Overview: |
| 26 | |
| 27 | The implementation currently supports both traditional TLS and TLS |
| 28 | descriptors, but only general dynamic (GD). |
| 29 | |
| 30 | For traditional TLS the assembler will present us with code |
| 31 | fragments of the form: |
| 32 | |
| 33 | adrp x0, :tlsgd:foo |
| 34 | R_AARCH64_TLSGD_ADR_PAGE21(foo) |
| 35 | add x0, :tlsgd_lo12:foo |
| 36 | R_AARCH64_TLSGD_ADD_LO12_NC(foo) |
| 37 | bl __tls_get_addr |
| 38 | nop |
| 39 | |
| 40 | For TLS descriptors the assembler will present us with code |
| 41 | fragments of the form: |
| 42 | |
| 43 | adrp x0, :tlsdesc:foo R_AARCH64_TLSDESC_ADR_PAGE21(foo) |
| 44 | ldr x1, [x0, #:tlsdesc_lo12:foo] R_AARCH64_TLSDESC_LD64_LO12(foo) |
| 45 | add x0, x0, #:tlsdesc_lo12:foo R_AARCH64_TLSDESC_ADD_LO12(foo) |
| 46 | .tlsdesccall foo |
| 47 | blr x1 R_AARCH64_TLSDESC_CALL(foo) |
| 48 | |
| 49 | The relocations R_AARCH64_TLSGD_{ADR_PREL21,ADD_LO12_NC} against foo |
| 50 | indicate that foo is thread local and should be accessed via the |
| 51 | traditional TLS mechanims. |
| 52 | |
| 53 | The relocations R_AARCH64_TLSDESC_{ADR_PAGE21,LD64_LO12_NC,ADD_LO12_NC} |
| 54 | against foo indicate that 'foo' is thread local and should be accessed |
| 55 | via a TLS descriptor mechanism. |
| 56 | |
| 57 | The precise instruction sequence is only relevant from the |
| 58 | perspective of linker relaxation which is currently not implemented. |
| 59 | |
| 60 | The static linker must detect that 'foo' is a TLS object and |
| 61 | allocate a double GOT entry. The GOT entry must be created for both |
| 62 | global and local TLS symbols. Note that this is different to none |
| 63 | TLS local objects which do not need a GOT entry. |
| 64 | |
| 65 | In the traditional TLS mechanism, the double GOT entry is used to |
| 66 | provide the tls_index structure, containing module and offset |
| 67 | entries. The static linker places the relocation R_AARCH64_TLS_DTPMOD |
| 68 | on the module entry. The loader will subsequently fixup this |
| 69 | relocation with the module identity. |
| 70 | |
| 71 | For global traditional TLS symbols the static linker places an |
| 72 | R_AARCH64_TLS_DTPREL relocation on the offset entry. The loader |
| 73 | will subsequently fixup the offset. For local TLS symbols the static |
| 74 | linker fixes up offset. |
| 75 | |
| 76 | In the TLS descriptor mechanism the double GOT entry is used to |
| 77 | provide the descriptor. The static linker places the relocation |
| 78 | R_AARCH64_TLSDESC on the first GOT slot. The loader will |
| 79 | subsequently fix this up. |
| 80 | |
| 81 | Implementation: |
| 82 | |
| 83 | The handling of TLS symbols is implemented across a number of |
| 84 | different backend functions. The following is a top level view of |
| 85 | what processing is performed where. |
| 86 | |
| 87 | The TLS implementation maintains state information for each TLS |
| 88 | symbol. The state information for local and global symbols is kept |
| 89 | in different places. Global symbols use generic BFD structures while |
| 90 | local symbols use backend specific structures that are allocated and |
| 91 | maintained entirely by the backend. |
| 92 | |
| 93 | The flow: |
| 94 | |
| 95 | elfNN_aarch64_check_relocs() |
| 96 | |
| 97 | This function is invoked for each relocation. |
| 98 | |
| 99 | The TLS relocations R_AARCH64_TLSGD_{ADR_PREL21,ADD_LO12_NC} and |
| 100 | R_AARCH64_TLSDESC_{ADR_PAGE21,LD64_LO12_NC,ADD_LO12_NC} are |
| 101 | spotted. One time creation of local symbol data structures are |
| 102 | created when the first local symbol is seen. |
| 103 | |
| 104 | The reference count for a symbol is incremented. The GOT type for |
| 105 | each symbol is marked as general dynamic. |
| 106 | |
| 107 | elfNN_aarch64_allocate_dynrelocs () |
| 108 | |
| 109 | For each global with positive reference count we allocate a double |
| 110 | GOT slot. For a traditional TLS symbol we allocate space for two |
| 111 | relocation entries on the GOT, for a TLS descriptor symbol we |
| 112 | allocate space for one relocation on the slot. Record the GOT offset |
| 113 | for this symbol. |
| 114 | |
| 115 | elfNN_aarch64_size_dynamic_sections () |
| 116 | |
| 117 | Iterate all input BFDS, look for in the local symbol data structure |
| 118 | constructed earlier for local TLS symbols and allocate them double |
| 119 | GOT slots along with space for a single GOT relocation. Update the |
| 120 | local symbol structure to record the GOT offset allocated. |
| 121 | |
| 122 | elfNN_aarch64_relocate_section () |
| 123 | |
| 124 | Calls elfNN_aarch64_final_link_relocate () |
| 125 | |
| 126 | Emit the relevant TLS relocations against the GOT for each TLS |
| 127 | symbol. For local TLS symbols emit the GOT offset directly. The GOT |
| 128 | relocations are emitted once the first time a TLS symbol is |
| 129 | encountered. The implementation uses the LSB of the GOT offset to |
| 130 | flag that the relevant GOT relocations for a symbol have been |
| 131 | emitted. All of the TLS code that uses the GOT offset needs to take |
| 132 | care to mask out this flag bit before using the offset. |
| 133 | |
| 134 | elfNN_aarch64_final_link_relocate () |
| 135 | |
| 136 | Fixup the R_AARCH64_TLSGD_{ADR_PREL21, ADD_LO12_NC} relocations. */ |
| 137 | |
| 138 | #include "sysdep.h" |
| 139 | #include "bfd.h" |
| 140 | #include "libiberty.h" |
| 141 | #include "libbfd.h" |
| 142 | #include "bfd_stdint.h" |
| 143 | #include "elf-bfd.h" |
| 144 | #include "bfdlink.h" |
| 145 | #include "objalloc.h" |
| 146 | #include "elf/aarch64.h" |
| 147 | #include "elfxx-aarch64.h" |
| 148 | |
| 149 | #define ARCH_SIZE NN |
| 150 | |
| 151 | #if ARCH_SIZE == 64 |
| 152 | #define AARCH64_R(NAME) R_AARCH64_ ## NAME |
| 153 | #define AARCH64_R_STR(NAME) "R_AARCH64_" #NAME |
| 154 | #define HOWTO64(...) HOWTO (__VA_ARGS__) |
| 155 | #define HOWTO32(...) EMPTY_HOWTO (0) |
| 156 | #define LOG_FILE_ALIGN 3 |
| 157 | #define BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC BFD_RELOC_AARCH64_TLSDESC_LD64_LO12 |
| 158 | #endif |
| 159 | |
| 160 | #if ARCH_SIZE == 32 |
| 161 | #define AARCH64_R(NAME) R_AARCH64_P32_ ## NAME |
| 162 | #define AARCH64_R_STR(NAME) "R_AARCH64_P32_" #NAME |
| 163 | #define HOWTO64(...) EMPTY_HOWTO (0) |
| 164 | #define HOWTO32(...) HOWTO (__VA_ARGS__) |
| 165 | #define LOG_FILE_ALIGN 2 |
| 166 | #define BFD_RELOC_AARCH64_TLSDESC_LD32_LO12 BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC |
| 167 | #define R_AARCH64_P32_TLSDESC_ADD_LO12 R_AARCH64_P32_TLSDESC_ADD_LO12_NC |
| 168 | #endif |
| 169 | |
| 170 | #define IS_AARCH64_TLS_RELOC(R_TYPE) \ |
| 171 | ((R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC \ |
| 172 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21 \ |
| 173 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADR_PREL21 \ |
| 174 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC \ |
| 175 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_MOVW_G1 \ |
| 176 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21 \ |
| 177 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC \ |
| 178 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC \ |
| 179 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19 \ |
| 180 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC \ |
| 181 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1 \ |
| 182 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_HI12 \ |
| 183 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12 \ |
| 184 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12_NC \ |
| 185 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC \ |
| 186 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21 \ |
| 187 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADR_PREL21 \ |
| 188 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_LDST16_DTPREL_LO12 \ |
| 189 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_LDST16_DTPREL_LO12_NC \ |
| 190 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_LDST32_DTPREL_LO12 \ |
| 191 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_LDST32_DTPREL_LO12_NC \ |
| 192 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_LDST64_DTPREL_LO12 \ |
| 193 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_LDST64_DTPREL_LO12_NC \ |
| 194 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_LDST8_DTPREL_LO12 \ |
| 195 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_LDST8_DTPREL_LO12_NC \ |
| 196 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G0 \ |
| 197 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G0_NC \ |
| 198 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G1 \ |
| 199 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G1_NC \ |
| 200 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G2 \ |
| 201 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12 \ |
| 202 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12 \ |
| 203 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC \ |
| 204 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0 \ |
| 205 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC \ |
| 206 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1 \ |
| 207 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC \ |
| 208 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2 \ |
| 209 | || (R_TYPE) == BFD_RELOC_AARCH64_TLS_DTPMOD \ |
| 210 | || (R_TYPE) == BFD_RELOC_AARCH64_TLS_DTPREL \ |
| 211 | || (R_TYPE) == BFD_RELOC_AARCH64_TLS_TPREL \ |
| 212 | || IS_AARCH64_TLSDESC_RELOC ((R_TYPE))) |
| 213 | |
| 214 | #define IS_AARCH64_TLS_RELAX_RELOC(R_TYPE) \ |
| 215 | ((R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD \ |
| 216 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD_LO12 \ |
| 217 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21 \ |
| 218 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21 \ |
| 219 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_CALL \ |
| 220 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD_PREL19 \ |
| 221 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC \ |
| 222 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LDR \ |
| 223 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC \ |
| 224 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_OFF_G1 \ |
| 225 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LDR \ |
| 226 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21 \ |
| 227 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADR_PREL21 \ |
| 228 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC \ |
| 229 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC \ |
| 230 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_MOVW_G1 \ |
| 231 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21 \ |
| 232 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19 \ |
| 233 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC \ |
| 234 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC \ |
| 235 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21 \ |
| 236 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADR_PREL21) |
| 237 | |
| 238 | #define IS_AARCH64_TLSDESC_RELOC(R_TYPE) \ |
| 239 | ((R_TYPE) == BFD_RELOC_AARCH64_TLSDESC \ |
| 240 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD \ |
| 241 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD_LO12 \ |
| 242 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21 \ |
| 243 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21 \ |
| 244 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_CALL \ |
| 245 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC \ |
| 246 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD64_LO12 \ |
| 247 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LDR \ |
| 248 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD_PREL19 \ |
| 249 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC \ |
| 250 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_OFF_G1) |
| 251 | |
| 252 | #define ELIMINATE_COPY_RELOCS 1 |
| 253 | |
| 254 | /* Return size of a relocation entry. HTAB is the bfd's |
| 255 | elf_aarch64_link_hash_entry. */ |
| 256 | #define RELOC_SIZE(HTAB) (sizeof (ElfNN_External_Rela)) |
| 257 | |
| 258 | /* GOT Entry size - 8 bytes in ELF64 and 4 bytes in ELF32. */ |
| 259 | #define GOT_ENTRY_SIZE (ARCH_SIZE / 8) |
| 260 | #define PLT_ENTRY_SIZE (32) |
| 261 | #define PLT_SMALL_ENTRY_SIZE (16) |
| 262 | #define PLT_TLSDESC_ENTRY_SIZE (32) |
| 263 | |
| 264 | /* Encoding of the nop instruction. */ |
| 265 | #define INSN_NOP 0xd503201f |
| 266 | |
| 267 | #define aarch64_compute_jump_table_size(htab) \ |
| 268 | (((htab)->root.srelplt == NULL) ? 0 \ |
| 269 | : (htab)->root.srelplt->reloc_count * GOT_ENTRY_SIZE) |
| 270 | |
| 271 | /* The first entry in a procedure linkage table looks like this |
| 272 | if the distance between the PLTGOT and the PLT is < 4GB use |
| 273 | these PLT entries. Note that the dynamic linker gets &PLTGOT[2] |
| 274 | in x16 and needs to work out PLTGOT[1] by using an address of |
| 275 | [x16,#-GOT_ENTRY_SIZE]. */ |
| 276 | static const bfd_byte elfNN_aarch64_small_plt0_entry[PLT_ENTRY_SIZE] = |
| 277 | { |
| 278 | 0xf0, 0x7b, 0xbf, 0xa9, /* stp x16, x30, [sp, #-16]! */ |
| 279 | 0x10, 0x00, 0x00, 0x90, /* adrp x16, (GOT+16) */ |
| 280 | #if ARCH_SIZE == 64 |
| 281 | 0x11, 0x0A, 0x40, 0xf9, /* ldr x17, [x16, #PLT_GOT+0x10] */ |
| 282 | 0x10, 0x42, 0x00, 0x91, /* add x16, x16,#PLT_GOT+0x10 */ |
| 283 | #else |
| 284 | 0x11, 0x0A, 0x40, 0xb9, /* ldr w17, [x16, #PLT_GOT+0x8] */ |
| 285 | 0x10, 0x22, 0x00, 0x11, /* add w16, w16,#PLT_GOT+0x8 */ |
| 286 | #endif |
| 287 | 0x20, 0x02, 0x1f, 0xd6, /* br x17 */ |
| 288 | 0x1f, 0x20, 0x03, 0xd5, /* nop */ |
| 289 | 0x1f, 0x20, 0x03, 0xd5, /* nop */ |
| 290 | 0x1f, 0x20, 0x03, 0xd5, /* nop */ |
| 291 | }; |
| 292 | |
| 293 | /* Per function entry in a procedure linkage table looks like this |
| 294 | if the distance between the PLTGOT and the PLT is < 4GB use |
| 295 | these PLT entries. */ |
| 296 | static const bfd_byte elfNN_aarch64_small_plt_entry[PLT_SMALL_ENTRY_SIZE] = |
| 297 | { |
| 298 | 0x10, 0x00, 0x00, 0x90, /* adrp x16, PLTGOT + n * 8 */ |
| 299 | #if ARCH_SIZE == 64 |
| 300 | 0x11, 0x02, 0x40, 0xf9, /* ldr x17, [x16, PLTGOT + n * 8] */ |
| 301 | 0x10, 0x02, 0x00, 0x91, /* add x16, x16, :lo12:PLTGOT + n * 8 */ |
| 302 | #else |
| 303 | 0x11, 0x02, 0x40, 0xb9, /* ldr w17, [x16, PLTGOT + n * 4] */ |
| 304 | 0x10, 0x02, 0x00, 0x11, /* add w16, w16, :lo12:PLTGOT + n * 4 */ |
| 305 | #endif |
| 306 | 0x20, 0x02, 0x1f, 0xd6, /* br x17. */ |
| 307 | }; |
| 308 | |
| 309 | static const bfd_byte |
| 310 | elfNN_aarch64_tlsdesc_small_plt_entry[PLT_TLSDESC_ENTRY_SIZE] = |
| 311 | { |
| 312 | 0xe2, 0x0f, 0xbf, 0xa9, /* stp x2, x3, [sp, #-16]! */ |
| 313 | 0x02, 0x00, 0x00, 0x90, /* adrp x2, 0 */ |
| 314 | 0x03, 0x00, 0x00, 0x90, /* adrp x3, 0 */ |
| 315 | #if ARCH_SIZE == 64 |
| 316 | 0x42, 0x00, 0x40, 0xf9, /* ldr x2, [x2, #0] */ |
| 317 | 0x63, 0x00, 0x00, 0x91, /* add x3, x3, 0 */ |
| 318 | #else |
| 319 | 0x42, 0x00, 0x40, 0xb9, /* ldr w2, [x2, #0] */ |
| 320 | 0x63, 0x00, 0x00, 0x11, /* add w3, w3, 0 */ |
| 321 | #endif |
| 322 | 0x40, 0x00, 0x1f, 0xd6, /* br x2 */ |
| 323 | 0x1f, 0x20, 0x03, 0xd5, /* nop */ |
| 324 | 0x1f, 0x20, 0x03, 0xd5, /* nop */ |
| 325 | }; |
| 326 | |
| 327 | #define elf_info_to_howto elfNN_aarch64_info_to_howto |
| 328 | #define elf_info_to_howto_rel elfNN_aarch64_info_to_howto |
| 329 | |
| 330 | #define AARCH64_ELF_ABI_VERSION 0 |
| 331 | |
| 332 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */ |
| 333 | #define ALL_ONES (~ (bfd_vma) 0) |
| 334 | |
| 335 | /* Indexed by the bfd interal reloc enumerators. |
| 336 | Therefore, the table needs to be synced with BFD_RELOC_AARCH64_* |
| 337 | in reloc.c. */ |
| 338 | |
| 339 | static reloc_howto_type elfNN_aarch64_howto_table[] = |
| 340 | { |
| 341 | EMPTY_HOWTO (0), |
| 342 | |
| 343 | /* Basic data relocations. */ |
| 344 | |
| 345 | /* Deprecated, but retained for backwards compatibility. */ |
| 346 | HOWTO64 (R_AARCH64_NULL, /* type */ |
| 347 | 0, /* rightshift */ |
| 348 | 3, /* size (0 = byte, 1 = short, 2 = long) */ |
| 349 | 0, /* bitsize */ |
| 350 | FALSE, /* pc_relative */ |
| 351 | 0, /* bitpos */ |
| 352 | complain_overflow_dont, /* complain_on_overflow */ |
| 353 | bfd_elf_generic_reloc, /* special_function */ |
| 354 | "R_AARCH64_NULL", /* name */ |
| 355 | FALSE, /* partial_inplace */ |
| 356 | 0, /* src_mask */ |
| 357 | 0, /* dst_mask */ |
| 358 | FALSE), /* pcrel_offset */ |
| 359 | HOWTO (R_AARCH64_NONE, /* type */ |
| 360 | 0, /* rightshift */ |
| 361 | 3, /* size (0 = byte, 1 = short, 2 = long) */ |
| 362 | 0, /* bitsize */ |
| 363 | FALSE, /* pc_relative */ |
| 364 | 0, /* bitpos */ |
| 365 | complain_overflow_dont, /* complain_on_overflow */ |
| 366 | bfd_elf_generic_reloc, /* special_function */ |
| 367 | "R_AARCH64_NONE", /* name */ |
| 368 | FALSE, /* partial_inplace */ |
| 369 | 0, /* src_mask */ |
| 370 | 0, /* dst_mask */ |
| 371 | FALSE), /* pcrel_offset */ |
| 372 | |
| 373 | /* .xword: (S+A) */ |
| 374 | HOWTO64 (AARCH64_R (ABS64), /* type */ |
| 375 | 0, /* rightshift */ |
| 376 | 4, /* size (4 = long long) */ |
| 377 | 64, /* bitsize */ |
| 378 | FALSE, /* pc_relative */ |
| 379 | 0, /* bitpos */ |
| 380 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 381 | bfd_elf_generic_reloc, /* special_function */ |
| 382 | AARCH64_R_STR (ABS64), /* name */ |
| 383 | FALSE, /* partial_inplace */ |
| 384 | ALL_ONES, /* src_mask */ |
| 385 | ALL_ONES, /* dst_mask */ |
| 386 | FALSE), /* pcrel_offset */ |
| 387 | |
| 388 | /* .word: (S+A) */ |
| 389 | HOWTO (AARCH64_R (ABS32), /* type */ |
| 390 | 0, /* rightshift */ |
| 391 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 392 | 32, /* bitsize */ |
| 393 | FALSE, /* pc_relative */ |
| 394 | 0, /* bitpos */ |
| 395 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 396 | bfd_elf_generic_reloc, /* special_function */ |
| 397 | AARCH64_R_STR (ABS32), /* name */ |
| 398 | FALSE, /* partial_inplace */ |
| 399 | 0xffffffff, /* src_mask */ |
| 400 | 0xffffffff, /* dst_mask */ |
| 401 | FALSE), /* pcrel_offset */ |
| 402 | |
| 403 | /* .half: (S+A) */ |
| 404 | HOWTO (AARCH64_R (ABS16), /* type */ |
| 405 | 0, /* rightshift */ |
| 406 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 407 | 16, /* bitsize */ |
| 408 | FALSE, /* pc_relative */ |
| 409 | 0, /* bitpos */ |
| 410 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 411 | bfd_elf_generic_reloc, /* special_function */ |
| 412 | AARCH64_R_STR (ABS16), /* name */ |
| 413 | FALSE, /* partial_inplace */ |
| 414 | 0xffff, /* src_mask */ |
| 415 | 0xffff, /* dst_mask */ |
| 416 | FALSE), /* pcrel_offset */ |
| 417 | |
| 418 | /* .xword: (S+A-P) */ |
| 419 | HOWTO64 (AARCH64_R (PREL64), /* type */ |
| 420 | 0, /* rightshift */ |
| 421 | 4, /* size (4 = long long) */ |
| 422 | 64, /* bitsize */ |
| 423 | TRUE, /* pc_relative */ |
| 424 | 0, /* bitpos */ |
| 425 | complain_overflow_signed, /* complain_on_overflow */ |
| 426 | bfd_elf_generic_reloc, /* special_function */ |
| 427 | AARCH64_R_STR (PREL64), /* name */ |
| 428 | FALSE, /* partial_inplace */ |
| 429 | ALL_ONES, /* src_mask */ |
| 430 | ALL_ONES, /* dst_mask */ |
| 431 | TRUE), /* pcrel_offset */ |
| 432 | |
| 433 | /* .word: (S+A-P) */ |
| 434 | HOWTO (AARCH64_R (PREL32), /* type */ |
| 435 | 0, /* rightshift */ |
| 436 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 437 | 32, /* bitsize */ |
| 438 | TRUE, /* pc_relative */ |
| 439 | 0, /* bitpos */ |
| 440 | complain_overflow_signed, /* complain_on_overflow */ |
| 441 | bfd_elf_generic_reloc, /* special_function */ |
| 442 | AARCH64_R_STR (PREL32), /* name */ |
| 443 | FALSE, /* partial_inplace */ |
| 444 | 0xffffffff, /* src_mask */ |
| 445 | 0xffffffff, /* dst_mask */ |
| 446 | TRUE), /* pcrel_offset */ |
| 447 | |
| 448 | /* .half: (S+A-P) */ |
| 449 | HOWTO (AARCH64_R (PREL16), /* type */ |
| 450 | 0, /* rightshift */ |
| 451 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 452 | 16, /* bitsize */ |
| 453 | TRUE, /* pc_relative */ |
| 454 | 0, /* bitpos */ |
| 455 | complain_overflow_signed, /* complain_on_overflow */ |
| 456 | bfd_elf_generic_reloc, /* special_function */ |
| 457 | AARCH64_R_STR (PREL16), /* name */ |
| 458 | FALSE, /* partial_inplace */ |
| 459 | 0xffff, /* src_mask */ |
| 460 | 0xffff, /* dst_mask */ |
| 461 | TRUE), /* pcrel_offset */ |
| 462 | |
| 463 | /* Group relocations to create a 16, 32, 48 or 64 bit |
| 464 | unsigned data or abs address inline. */ |
| 465 | |
| 466 | /* MOVZ: ((S+A) >> 0) & 0xffff */ |
| 467 | HOWTO (AARCH64_R (MOVW_UABS_G0), /* type */ |
| 468 | 0, /* rightshift */ |
| 469 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 470 | 16, /* bitsize */ |
| 471 | FALSE, /* pc_relative */ |
| 472 | 0, /* bitpos */ |
| 473 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 474 | bfd_elf_generic_reloc, /* special_function */ |
| 475 | AARCH64_R_STR (MOVW_UABS_G0), /* name */ |
| 476 | FALSE, /* partial_inplace */ |
| 477 | 0xffff, /* src_mask */ |
| 478 | 0xffff, /* dst_mask */ |
| 479 | FALSE), /* pcrel_offset */ |
| 480 | |
| 481 | /* MOVK: ((S+A) >> 0) & 0xffff [no overflow check] */ |
| 482 | HOWTO (AARCH64_R (MOVW_UABS_G0_NC), /* type */ |
| 483 | 0, /* rightshift */ |
| 484 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 485 | 16, /* bitsize */ |
| 486 | FALSE, /* pc_relative */ |
| 487 | 0, /* bitpos */ |
| 488 | complain_overflow_dont, /* complain_on_overflow */ |
| 489 | bfd_elf_generic_reloc, /* special_function */ |
| 490 | AARCH64_R_STR (MOVW_UABS_G0_NC), /* name */ |
| 491 | FALSE, /* partial_inplace */ |
| 492 | 0xffff, /* src_mask */ |
| 493 | 0xffff, /* dst_mask */ |
| 494 | FALSE), /* pcrel_offset */ |
| 495 | |
| 496 | /* MOVZ: ((S+A) >> 16) & 0xffff */ |
| 497 | HOWTO (AARCH64_R (MOVW_UABS_G1), /* type */ |
| 498 | 16, /* rightshift */ |
| 499 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 500 | 16, /* bitsize */ |
| 501 | FALSE, /* pc_relative */ |
| 502 | 0, /* bitpos */ |
| 503 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 504 | bfd_elf_generic_reloc, /* special_function */ |
| 505 | AARCH64_R_STR (MOVW_UABS_G1), /* name */ |
| 506 | FALSE, /* partial_inplace */ |
| 507 | 0xffff, /* src_mask */ |
| 508 | 0xffff, /* dst_mask */ |
| 509 | FALSE), /* pcrel_offset */ |
| 510 | |
| 511 | /* MOVK: ((S+A) >> 16) & 0xffff [no overflow check] */ |
| 512 | HOWTO64 (AARCH64_R (MOVW_UABS_G1_NC), /* type */ |
| 513 | 16, /* rightshift */ |
| 514 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 515 | 16, /* bitsize */ |
| 516 | FALSE, /* pc_relative */ |
| 517 | 0, /* bitpos */ |
| 518 | complain_overflow_dont, /* complain_on_overflow */ |
| 519 | bfd_elf_generic_reloc, /* special_function */ |
| 520 | AARCH64_R_STR (MOVW_UABS_G1_NC), /* name */ |
| 521 | FALSE, /* partial_inplace */ |
| 522 | 0xffff, /* src_mask */ |
| 523 | 0xffff, /* dst_mask */ |
| 524 | FALSE), /* pcrel_offset */ |
| 525 | |
| 526 | /* MOVZ: ((S+A) >> 32) & 0xffff */ |
| 527 | HOWTO64 (AARCH64_R (MOVW_UABS_G2), /* type */ |
| 528 | 32, /* rightshift */ |
| 529 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 530 | 16, /* bitsize */ |
| 531 | FALSE, /* pc_relative */ |
| 532 | 0, /* bitpos */ |
| 533 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 534 | bfd_elf_generic_reloc, /* special_function */ |
| 535 | AARCH64_R_STR (MOVW_UABS_G2), /* name */ |
| 536 | FALSE, /* partial_inplace */ |
| 537 | 0xffff, /* src_mask */ |
| 538 | 0xffff, /* dst_mask */ |
| 539 | FALSE), /* pcrel_offset */ |
| 540 | |
| 541 | /* MOVK: ((S+A) >> 32) & 0xffff [no overflow check] */ |
| 542 | HOWTO64 (AARCH64_R (MOVW_UABS_G2_NC), /* type */ |
| 543 | 32, /* rightshift */ |
| 544 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 545 | 16, /* bitsize */ |
| 546 | FALSE, /* pc_relative */ |
| 547 | 0, /* bitpos */ |
| 548 | complain_overflow_dont, /* complain_on_overflow */ |
| 549 | bfd_elf_generic_reloc, /* special_function */ |
| 550 | AARCH64_R_STR (MOVW_UABS_G2_NC), /* name */ |
| 551 | FALSE, /* partial_inplace */ |
| 552 | 0xffff, /* src_mask */ |
| 553 | 0xffff, /* dst_mask */ |
| 554 | FALSE), /* pcrel_offset */ |
| 555 | |
| 556 | /* MOVZ: ((S+A) >> 48) & 0xffff */ |
| 557 | HOWTO64 (AARCH64_R (MOVW_UABS_G3), /* type */ |
| 558 | 48, /* rightshift */ |
| 559 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 560 | 16, /* bitsize */ |
| 561 | FALSE, /* pc_relative */ |
| 562 | 0, /* bitpos */ |
| 563 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 564 | bfd_elf_generic_reloc, /* special_function */ |
| 565 | AARCH64_R_STR (MOVW_UABS_G3), /* name */ |
| 566 | FALSE, /* partial_inplace */ |
| 567 | 0xffff, /* src_mask */ |
| 568 | 0xffff, /* dst_mask */ |
| 569 | FALSE), /* pcrel_offset */ |
| 570 | |
| 571 | /* Group relocations to create high part of a 16, 32, 48 or 64 bit |
| 572 | signed data or abs address inline. Will change instruction |
| 573 | to MOVN or MOVZ depending on sign of calculated value. */ |
| 574 | |
| 575 | /* MOV[ZN]: ((S+A) >> 0) & 0xffff */ |
| 576 | HOWTO (AARCH64_R (MOVW_SABS_G0), /* type */ |
| 577 | 0, /* rightshift */ |
| 578 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 579 | 17, /* bitsize */ |
| 580 | FALSE, /* pc_relative */ |
| 581 | 0, /* bitpos */ |
| 582 | complain_overflow_signed, /* complain_on_overflow */ |
| 583 | bfd_elf_generic_reloc, /* special_function */ |
| 584 | AARCH64_R_STR (MOVW_SABS_G0), /* name */ |
| 585 | FALSE, /* partial_inplace */ |
| 586 | 0xffff, /* src_mask */ |
| 587 | 0xffff, /* dst_mask */ |
| 588 | FALSE), /* pcrel_offset */ |
| 589 | |
| 590 | /* MOV[ZN]: ((S+A) >> 16) & 0xffff */ |
| 591 | HOWTO64 (AARCH64_R (MOVW_SABS_G1), /* type */ |
| 592 | 16, /* rightshift */ |
| 593 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 594 | 17, /* bitsize */ |
| 595 | FALSE, /* pc_relative */ |
| 596 | 0, /* bitpos */ |
| 597 | complain_overflow_signed, /* complain_on_overflow */ |
| 598 | bfd_elf_generic_reloc, /* special_function */ |
| 599 | AARCH64_R_STR (MOVW_SABS_G1), /* name */ |
| 600 | FALSE, /* partial_inplace */ |
| 601 | 0xffff, /* src_mask */ |
| 602 | 0xffff, /* dst_mask */ |
| 603 | FALSE), /* pcrel_offset */ |
| 604 | |
| 605 | /* MOV[ZN]: ((S+A) >> 32) & 0xffff */ |
| 606 | HOWTO64 (AARCH64_R (MOVW_SABS_G2), /* type */ |
| 607 | 32, /* rightshift */ |
| 608 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 609 | 17, /* bitsize */ |
| 610 | FALSE, /* pc_relative */ |
| 611 | 0, /* bitpos */ |
| 612 | complain_overflow_signed, /* complain_on_overflow */ |
| 613 | bfd_elf_generic_reloc, /* special_function */ |
| 614 | AARCH64_R_STR (MOVW_SABS_G2), /* name */ |
| 615 | FALSE, /* partial_inplace */ |
| 616 | 0xffff, /* src_mask */ |
| 617 | 0xffff, /* dst_mask */ |
| 618 | FALSE), /* pcrel_offset */ |
| 619 | |
| 620 | /* Group relocations to create a 16, 32, 48 or 64 bit |
| 621 | PC relative address inline. */ |
| 622 | |
| 623 | /* MOV[NZ]: ((S+A-P) >> 0) & 0xffff */ |
| 624 | HOWTO64 (AARCH64_R (MOVW_PREL_G0), /* type */ |
| 625 | 0, /* rightshift */ |
| 626 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 627 | 17, /* bitsize */ |
| 628 | TRUE, /* pc_relative */ |
| 629 | 0, /* bitpos */ |
| 630 | complain_overflow_signed, /* complain_on_overflow */ |
| 631 | bfd_elf_generic_reloc, /* special_function */ |
| 632 | AARCH64_R_STR (MOVW_PREL_G0), /* name */ |
| 633 | FALSE, /* partial_inplace */ |
| 634 | 0xffff, /* src_mask */ |
| 635 | 0xffff, /* dst_mask */ |
| 636 | TRUE), /* pcrel_offset */ |
| 637 | |
| 638 | /* MOVK: ((S+A-P) >> 0) & 0xffff [no overflow check] */ |
| 639 | HOWTO64 (AARCH64_R (MOVW_PREL_G0_NC), /* type */ |
| 640 | 0, /* rightshift */ |
| 641 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 642 | 16, /* bitsize */ |
| 643 | TRUE, /* pc_relative */ |
| 644 | 0, /* bitpos */ |
| 645 | complain_overflow_dont, /* complain_on_overflow */ |
| 646 | bfd_elf_generic_reloc, /* special_function */ |
| 647 | AARCH64_R_STR (MOVW_PREL_G0_NC), /* name */ |
| 648 | FALSE, /* partial_inplace */ |
| 649 | 0xffff, /* src_mask */ |
| 650 | 0xffff, /* dst_mask */ |
| 651 | TRUE), /* pcrel_offset */ |
| 652 | |
| 653 | /* MOV[NZ]: ((S+A-P) >> 16) & 0xffff */ |
| 654 | HOWTO64 (AARCH64_R (MOVW_PREL_G1), /* type */ |
| 655 | 16, /* rightshift */ |
| 656 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 657 | 17, /* bitsize */ |
| 658 | TRUE, /* pc_relative */ |
| 659 | 0, /* bitpos */ |
| 660 | complain_overflow_signed, /* complain_on_overflow */ |
| 661 | bfd_elf_generic_reloc, /* special_function */ |
| 662 | AARCH64_R_STR (MOVW_PREL_G1), /* name */ |
| 663 | FALSE, /* partial_inplace */ |
| 664 | 0xffff, /* src_mask */ |
| 665 | 0xffff, /* dst_mask */ |
| 666 | TRUE), /* pcrel_offset */ |
| 667 | |
| 668 | /* MOVK: ((S+A-P) >> 16) & 0xffff [no overflow check] */ |
| 669 | HOWTO64 (AARCH64_R (MOVW_PREL_G1_NC), /* type */ |
| 670 | 16, /* rightshift */ |
| 671 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 672 | 16, /* bitsize */ |
| 673 | TRUE, /* pc_relative */ |
| 674 | 0, /* bitpos */ |
| 675 | complain_overflow_dont, /* complain_on_overflow */ |
| 676 | bfd_elf_generic_reloc, /* special_function */ |
| 677 | AARCH64_R_STR (MOVW_PREL_G1_NC), /* name */ |
| 678 | FALSE, /* partial_inplace */ |
| 679 | 0xffff, /* src_mask */ |
| 680 | 0xffff, /* dst_mask */ |
| 681 | TRUE), /* pcrel_offset */ |
| 682 | |
| 683 | /* MOV[NZ]: ((S+A-P) >> 32) & 0xffff */ |
| 684 | HOWTO64 (AARCH64_R (MOVW_PREL_G2), /* type */ |
| 685 | 32, /* rightshift */ |
| 686 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 687 | 17, /* bitsize */ |
| 688 | TRUE, /* pc_relative */ |
| 689 | 0, /* bitpos */ |
| 690 | complain_overflow_signed, /* complain_on_overflow */ |
| 691 | bfd_elf_generic_reloc, /* special_function */ |
| 692 | AARCH64_R_STR (MOVW_PREL_G2), /* name */ |
| 693 | FALSE, /* partial_inplace */ |
| 694 | 0xffff, /* src_mask */ |
| 695 | 0xffff, /* dst_mask */ |
| 696 | TRUE), /* pcrel_offset */ |
| 697 | |
| 698 | /* MOVK: ((S+A-P) >> 32) & 0xffff [no overflow check] */ |
| 699 | HOWTO64 (AARCH64_R (MOVW_PREL_G2_NC), /* type */ |
| 700 | 32, /* rightshift */ |
| 701 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 702 | 16, /* bitsize */ |
| 703 | TRUE, /* pc_relative */ |
| 704 | 0, /* bitpos */ |
| 705 | complain_overflow_dont, /* complain_on_overflow */ |
| 706 | bfd_elf_generic_reloc, /* special_function */ |
| 707 | AARCH64_R_STR (MOVW_PREL_G2_NC), /* name */ |
| 708 | FALSE, /* partial_inplace */ |
| 709 | 0xffff, /* src_mask */ |
| 710 | 0xffff, /* dst_mask */ |
| 711 | TRUE), /* pcrel_offset */ |
| 712 | |
| 713 | /* MOV[NZ]: ((S+A-P) >> 48) & 0xffff */ |
| 714 | HOWTO64 (AARCH64_R (MOVW_PREL_G3), /* type */ |
| 715 | 48, /* rightshift */ |
| 716 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 717 | 16, /* bitsize */ |
| 718 | TRUE, /* pc_relative */ |
| 719 | 0, /* bitpos */ |
| 720 | complain_overflow_dont, /* complain_on_overflow */ |
| 721 | bfd_elf_generic_reloc, /* special_function */ |
| 722 | AARCH64_R_STR (MOVW_PREL_G3), /* name */ |
| 723 | FALSE, /* partial_inplace */ |
| 724 | 0xffff, /* src_mask */ |
| 725 | 0xffff, /* dst_mask */ |
| 726 | TRUE), /* pcrel_offset */ |
| 727 | |
| 728 | /* Relocations to generate 19, 21 and 33 bit PC-relative load/store |
| 729 | addresses: PG(x) is (x & ~0xfff). */ |
| 730 | |
| 731 | /* LD-lit: ((S+A-P) >> 2) & 0x7ffff */ |
| 732 | HOWTO (AARCH64_R (LD_PREL_LO19), /* type */ |
| 733 | 2, /* rightshift */ |
| 734 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 735 | 19, /* bitsize */ |
| 736 | TRUE, /* pc_relative */ |
| 737 | 0, /* bitpos */ |
| 738 | complain_overflow_signed, /* complain_on_overflow */ |
| 739 | bfd_elf_generic_reloc, /* special_function */ |
| 740 | AARCH64_R_STR (LD_PREL_LO19), /* name */ |
| 741 | FALSE, /* partial_inplace */ |
| 742 | 0x7ffff, /* src_mask */ |
| 743 | 0x7ffff, /* dst_mask */ |
| 744 | TRUE), /* pcrel_offset */ |
| 745 | |
| 746 | /* ADR: (S+A-P) & 0x1fffff */ |
| 747 | HOWTO (AARCH64_R (ADR_PREL_LO21), /* type */ |
| 748 | 0, /* rightshift */ |
| 749 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 750 | 21, /* bitsize */ |
| 751 | TRUE, /* pc_relative */ |
| 752 | 0, /* bitpos */ |
| 753 | complain_overflow_signed, /* complain_on_overflow */ |
| 754 | bfd_elf_generic_reloc, /* special_function */ |
| 755 | AARCH64_R_STR (ADR_PREL_LO21), /* name */ |
| 756 | FALSE, /* partial_inplace */ |
| 757 | 0x1fffff, /* src_mask */ |
| 758 | 0x1fffff, /* dst_mask */ |
| 759 | TRUE), /* pcrel_offset */ |
| 760 | |
| 761 | /* ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */ |
| 762 | HOWTO (AARCH64_R (ADR_PREL_PG_HI21), /* type */ |
| 763 | 12, /* rightshift */ |
| 764 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 765 | 21, /* bitsize */ |
| 766 | TRUE, /* pc_relative */ |
| 767 | 0, /* bitpos */ |
| 768 | complain_overflow_signed, /* complain_on_overflow */ |
| 769 | bfd_elf_generic_reloc, /* special_function */ |
| 770 | AARCH64_R_STR (ADR_PREL_PG_HI21), /* name */ |
| 771 | FALSE, /* partial_inplace */ |
| 772 | 0x1fffff, /* src_mask */ |
| 773 | 0x1fffff, /* dst_mask */ |
| 774 | TRUE), /* pcrel_offset */ |
| 775 | |
| 776 | /* ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff [no overflow check] */ |
| 777 | HOWTO64 (AARCH64_R (ADR_PREL_PG_HI21_NC), /* type */ |
| 778 | 12, /* rightshift */ |
| 779 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 780 | 21, /* bitsize */ |
| 781 | TRUE, /* pc_relative */ |
| 782 | 0, /* bitpos */ |
| 783 | complain_overflow_dont, /* complain_on_overflow */ |
| 784 | bfd_elf_generic_reloc, /* special_function */ |
| 785 | AARCH64_R_STR (ADR_PREL_PG_HI21_NC), /* name */ |
| 786 | FALSE, /* partial_inplace */ |
| 787 | 0x1fffff, /* src_mask */ |
| 788 | 0x1fffff, /* dst_mask */ |
| 789 | TRUE), /* pcrel_offset */ |
| 790 | |
| 791 | /* ADD: (S+A) & 0xfff [no overflow check] */ |
| 792 | HOWTO (AARCH64_R (ADD_ABS_LO12_NC), /* type */ |
| 793 | 0, /* rightshift */ |
| 794 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 795 | 12, /* bitsize */ |
| 796 | FALSE, /* pc_relative */ |
| 797 | 10, /* bitpos */ |
| 798 | complain_overflow_dont, /* complain_on_overflow */ |
| 799 | bfd_elf_generic_reloc, /* special_function */ |
| 800 | AARCH64_R_STR (ADD_ABS_LO12_NC), /* name */ |
| 801 | FALSE, /* partial_inplace */ |
| 802 | 0x3ffc00, /* src_mask */ |
| 803 | 0x3ffc00, /* dst_mask */ |
| 804 | FALSE), /* pcrel_offset */ |
| 805 | |
| 806 | /* LD/ST8: (S+A) & 0xfff */ |
| 807 | HOWTO (AARCH64_R (LDST8_ABS_LO12_NC), /* type */ |
| 808 | 0, /* rightshift */ |
| 809 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 810 | 12, /* bitsize */ |
| 811 | FALSE, /* pc_relative */ |
| 812 | 0, /* bitpos */ |
| 813 | complain_overflow_dont, /* complain_on_overflow */ |
| 814 | bfd_elf_generic_reloc, /* special_function */ |
| 815 | AARCH64_R_STR (LDST8_ABS_LO12_NC), /* name */ |
| 816 | FALSE, /* partial_inplace */ |
| 817 | 0xfff, /* src_mask */ |
| 818 | 0xfff, /* dst_mask */ |
| 819 | FALSE), /* pcrel_offset */ |
| 820 | |
| 821 | /* Relocations for control-flow instructions. */ |
| 822 | |
| 823 | /* TBZ/NZ: ((S+A-P) >> 2) & 0x3fff */ |
| 824 | HOWTO (AARCH64_R (TSTBR14), /* type */ |
| 825 | 2, /* rightshift */ |
| 826 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 827 | 14, /* bitsize */ |
| 828 | TRUE, /* pc_relative */ |
| 829 | 0, /* bitpos */ |
| 830 | complain_overflow_signed, /* complain_on_overflow */ |
| 831 | bfd_elf_generic_reloc, /* special_function */ |
| 832 | AARCH64_R_STR (TSTBR14), /* name */ |
| 833 | FALSE, /* partial_inplace */ |
| 834 | 0x3fff, /* src_mask */ |
| 835 | 0x3fff, /* dst_mask */ |
| 836 | TRUE), /* pcrel_offset */ |
| 837 | |
| 838 | /* B.cond: ((S+A-P) >> 2) & 0x7ffff */ |
| 839 | HOWTO (AARCH64_R (CONDBR19), /* type */ |
| 840 | 2, /* rightshift */ |
| 841 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 842 | 19, /* bitsize */ |
| 843 | TRUE, /* pc_relative */ |
| 844 | 0, /* bitpos */ |
| 845 | complain_overflow_signed, /* complain_on_overflow */ |
| 846 | bfd_elf_generic_reloc, /* special_function */ |
| 847 | AARCH64_R_STR (CONDBR19), /* name */ |
| 848 | FALSE, /* partial_inplace */ |
| 849 | 0x7ffff, /* src_mask */ |
| 850 | 0x7ffff, /* dst_mask */ |
| 851 | TRUE), /* pcrel_offset */ |
| 852 | |
| 853 | /* B: ((S+A-P) >> 2) & 0x3ffffff */ |
| 854 | HOWTO (AARCH64_R (JUMP26), /* type */ |
| 855 | 2, /* rightshift */ |
| 856 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 857 | 26, /* bitsize */ |
| 858 | TRUE, /* pc_relative */ |
| 859 | 0, /* bitpos */ |
| 860 | complain_overflow_signed, /* complain_on_overflow */ |
| 861 | bfd_elf_generic_reloc, /* special_function */ |
| 862 | AARCH64_R_STR (JUMP26), /* name */ |
| 863 | FALSE, /* partial_inplace */ |
| 864 | 0x3ffffff, /* src_mask */ |
| 865 | 0x3ffffff, /* dst_mask */ |
| 866 | TRUE), /* pcrel_offset */ |
| 867 | |
| 868 | /* BL: ((S+A-P) >> 2) & 0x3ffffff */ |
| 869 | HOWTO (AARCH64_R (CALL26), /* type */ |
| 870 | 2, /* rightshift */ |
| 871 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 872 | 26, /* bitsize */ |
| 873 | TRUE, /* pc_relative */ |
| 874 | 0, /* bitpos */ |
| 875 | complain_overflow_signed, /* complain_on_overflow */ |
| 876 | bfd_elf_generic_reloc, /* special_function */ |
| 877 | AARCH64_R_STR (CALL26), /* name */ |
| 878 | FALSE, /* partial_inplace */ |
| 879 | 0x3ffffff, /* src_mask */ |
| 880 | 0x3ffffff, /* dst_mask */ |
| 881 | TRUE), /* pcrel_offset */ |
| 882 | |
| 883 | /* LD/ST16: (S+A) & 0xffe */ |
| 884 | HOWTO (AARCH64_R (LDST16_ABS_LO12_NC), /* type */ |
| 885 | 1, /* rightshift */ |
| 886 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 887 | 12, /* bitsize */ |
| 888 | FALSE, /* pc_relative */ |
| 889 | 0, /* bitpos */ |
| 890 | complain_overflow_dont, /* complain_on_overflow */ |
| 891 | bfd_elf_generic_reloc, /* special_function */ |
| 892 | AARCH64_R_STR (LDST16_ABS_LO12_NC), /* name */ |
| 893 | FALSE, /* partial_inplace */ |
| 894 | 0xffe, /* src_mask */ |
| 895 | 0xffe, /* dst_mask */ |
| 896 | FALSE), /* pcrel_offset */ |
| 897 | |
| 898 | /* LD/ST32: (S+A) & 0xffc */ |
| 899 | HOWTO (AARCH64_R (LDST32_ABS_LO12_NC), /* type */ |
| 900 | 2, /* rightshift */ |
| 901 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 902 | 12, /* bitsize */ |
| 903 | FALSE, /* pc_relative */ |
| 904 | 0, /* bitpos */ |
| 905 | complain_overflow_dont, /* complain_on_overflow */ |
| 906 | bfd_elf_generic_reloc, /* special_function */ |
| 907 | AARCH64_R_STR (LDST32_ABS_LO12_NC), /* name */ |
| 908 | FALSE, /* partial_inplace */ |
| 909 | 0xffc, /* src_mask */ |
| 910 | 0xffc, /* dst_mask */ |
| 911 | FALSE), /* pcrel_offset */ |
| 912 | |
| 913 | /* LD/ST64: (S+A) & 0xff8 */ |
| 914 | HOWTO (AARCH64_R (LDST64_ABS_LO12_NC), /* type */ |
| 915 | 3, /* rightshift */ |
| 916 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 917 | 12, /* bitsize */ |
| 918 | FALSE, /* pc_relative */ |
| 919 | 0, /* bitpos */ |
| 920 | complain_overflow_dont, /* complain_on_overflow */ |
| 921 | bfd_elf_generic_reloc, /* special_function */ |
| 922 | AARCH64_R_STR (LDST64_ABS_LO12_NC), /* name */ |
| 923 | FALSE, /* partial_inplace */ |
| 924 | 0xff8, /* src_mask */ |
| 925 | 0xff8, /* dst_mask */ |
| 926 | FALSE), /* pcrel_offset */ |
| 927 | |
| 928 | /* LD/ST128: (S+A) & 0xff0 */ |
| 929 | HOWTO (AARCH64_R (LDST128_ABS_LO12_NC), /* type */ |
| 930 | 4, /* rightshift */ |
| 931 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 932 | 12, /* bitsize */ |
| 933 | FALSE, /* pc_relative */ |
| 934 | 0, /* bitpos */ |
| 935 | complain_overflow_dont, /* complain_on_overflow */ |
| 936 | bfd_elf_generic_reloc, /* special_function */ |
| 937 | AARCH64_R_STR (LDST128_ABS_LO12_NC), /* name */ |
| 938 | FALSE, /* partial_inplace */ |
| 939 | 0xff0, /* src_mask */ |
| 940 | 0xff0, /* dst_mask */ |
| 941 | FALSE), /* pcrel_offset */ |
| 942 | |
| 943 | /* Set a load-literal immediate field to bits |
| 944 | 0x1FFFFC of G(S)-P */ |
| 945 | HOWTO (AARCH64_R (GOT_LD_PREL19), /* type */ |
| 946 | 2, /* rightshift */ |
| 947 | 2, /* size (0 = byte,1 = short,2 = long) */ |
| 948 | 19, /* bitsize */ |
| 949 | TRUE, /* pc_relative */ |
| 950 | 0, /* bitpos */ |
| 951 | complain_overflow_signed, /* complain_on_overflow */ |
| 952 | bfd_elf_generic_reloc, /* special_function */ |
| 953 | AARCH64_R_STR (GOT_LD_PREL19), /* name */ |
| 954 | FALSE, /* partial_inplace */ |
| 955 | 0xffffe0, /* src_mask */ |
| 956 | 0xffffe0, /* dst_mask */ |
| 957 | TRUE), /* pcrel_offset */ |
| 958 | |
| 959 | /* Get to the page for the GOT entry for the symbol |
| 960 | (G(S) - P) using an ADRP instruction. */ |
| 961 | HOWTO (AARCH64_R (ADR_GOT_PAGE), /* type */ |
| 962 | 12, /* rightshift */ |
| 963 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 964 | 21, /* bitsize */ |
| 965 | TRUE, /* pc_relative */ |
| 966 | 0, /* bitpos */ |
| 967 | complain_overflow_dont, /* complain_on_overflow */ |
| 968 | bfd_elf_generic_reloc, /* special_function */ |
| 969 | AARCH64_R_STR (ADR_GOT_PAGE), /* name */ |
| 970 | FALSE, /* partial_inplace */ |
| 971 | 0x1fffff, /* src_mask */ |
| 972 | 0x1fffff, /* dst_mask */ |
| 973 | TRUE), /* pcrel_offset */ |
| 974 | |
| 975 | /* LD64: GOT offset G(S) & 0xff8 */ |
| 976 | HOWTO64 (AARCH64_R (LD64_GOT_LO12_NC), /* type */ |
| 977 | 3, /* rightshift */ |
| 978 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 979 | 12, /* bitsize */ |
| 980 | FALSE, /* pc_relative */ |
| 981 | 0, /* bitpos */ |
| 982 | complain_overflow_dont, /* complain_on_overflow */ |
| 983 | bfd_elf_generic_reloc, /* special_function */ |
| 984 | AARCH64_R_STR (LD64_GOT_LO12_NC), /* name */ |
| 985 | FALSE, /* partial_inplace */ |
| 986 | 0xff8, /* src_mask */ |
| 987 | 0xff8, /* dst_mask */ |
| 988 | FALSE), /* pcrel_offset */ |
| 989 | |
| 990 | /* LD32: GOT offset G(S) & 0xffc */ |
| 991 | HOWTO32 (AARCH64_R (LD32_GOT_LO12_NC), /* type */ |
| 992 | 2, /* rightshift */ |
| 993 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 994 | 12, /* bitsize */ |
| 995 | FALSE, /* pc_relative */ |
| 996 | 0, /* bitpos */ |
| 997 | complain_overflow_dont, /* complain_on_overflow */ |
| 998 | bfd_elf_generic_reloc, /* special_function */ |
| 999 | AARCH64_R_STR (LD32_GOT_LO12_NC), /* name */ |
| 1000 | FALSE, /* partial_inplace */ |
| 1001 | 0xffc, /* src_mask */ |
| 1002 | 0xffc, /* dst_mask */ |
| 1003 | FALSE), /* pcrel_offset */ |
| 1004 | |
| 1005 | /* Lower 16 bits of GOT offset for the symbol. */ |
| 1006 | HOWTO64 (AARCH64_R (MOVW_GOTOFF_G0_NC), /* type */ |
| 1007 | 0, /* rightshift */ |
| 1008 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1009 | 16, /* bitsize */ |
| 1010 | FALSE, /* pc_relative */ |
| 1011 | 0, /* bitpos */ |
| 1012 | complain_overflow_dont, /* complain_on_overflow */ |
| 1013 | bfd_elf_generic_reloc, /* special_function */ |
| 1014 | AARCH64_R_STR (MOVW_GOTOFF_G0_NC), /* name */ |
| 1015 | FALSE, /* partial_inplace */ |
| 1016 | 0xffff, /* src_mask */ |
| 1017 | 0xffff, /* dst_mask */ |
| 1018 | FALSE), /* pcrel_offset */ |
| 1019 | |
| 1020 | /* Higher 16 bits of GOT offset for the symbol. */ |
| 1021 | HOWTO64 (AARCH64_R (MOVW_GOTOFF_G1), /* type */ |
| 1022 | 16, /* rightshift */ |
| 1023 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1024 | 16, /* bitsize */ |
| 1025 | FALSE, /* pc_relative */ |
| 1026 | 0, /* bitpos */ |
| 1027 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 1028 | bfd_elf_generic_reloc, /* special_function */ |
| 1029 | AARCH64_R_STR (MOVW_GOTOFF_G1), /* name */ |
| 1030 | FALSE, /* partial_inplace */ |
| 1031 | 0xffff, /* src_mask */ |
| 1032 | 0xffff, /* dst_mask */ |
| 1033 | FALSE), /* pcrel_offset */ |
| 1034 | |
| 1035 | /* LD64: GOT offset for the symbol. */ |
| 1036 | HOWTO64 (AARCH64_R (LD64_GOTOFF_LO15), /* type */ |
| 1037 | 3, /* rightshift */ |
| 1038 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1039 | 12, /* bitsize */ |
| 1040 | FALSE, /* pc_relative */ |
| 1041 | 0, /* bitpos */ |
| 1042 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 1043 | bfd_elf_generic_reloc, /* special_function */ |
| 1044 | AARCH64_R_STR (LD64_GOTOFF_LO15), /* name */ |
| 1045 | FALSE, /* partial_inplace */ |
| 1046 | 0x7ff8, /* src_mask */ |
| 1047 | 0x7ff8, /* dst_mask */ |
| 1048 | FALSE), /* pcrel_offset */ |
| 1049 | |
| 1050 | /* LD32: GOT offset to the page address of GOT table. |
| 1051 | (G(S) - PAGE (_GLOBAL_OFFSET_TABLE_)) & 0x5ffc. */ |
| 1052 | HOWTO32 (AARCH64_R (LD32_GOTPAGE_LO14), /* type */ |
| 1053 | 2, /* rightshift */ |
| 1054 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1055 | 12, /* bitsize */ |
| 1056 | FALSE, /* pc_relative */ |
| 1057 | 0, /* bitpos */ |
| 1058 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 1059 | bfd_elf_generic_reloc, /* special_function */ |
| 1060 | AARCH64_R_STR (LD32_GOTPAGE_LO14), /* name */ |
| 1061 | FALSE, /* partial_inplace */ |
| 1062 | 0x5ffc, /* src_mask */ |
| 1063 | 0x5ffc, /* dst_mask */ |
| 1064 | FALSE), /* pcrel_offset */ |
| 1065 | |
| 1066 | /* LD64: GOT offset to the page address of GOT table. |
| 1067 | (G(S) - PAGE (_GLOBAL_OFFSET_TABLE_)) & 0x7ff8. */ |
| 1068 | HOWTO64 (AARCH64_R (LD64_GOTPAGE_LO15), /* type */ |
| 1069 | 3, /* rightshift */ |
| 1070 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1071 | 12, /* bitsize */ |
| 1072 | FALSE, /* pc_relative */ |
| 1073 | 0, /* bitpos */ |
| 1074 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 1075 | bfd_elf_generic_reloc, /* special_function */ |
| 1076 | AARCH64_R_STR (LD64_GOTPAGE_LO15), /* name */ |
| 1077 | FALSE, /* partial_inplace */ |
| 1078 | 0x7ff8, /* src_mask */ |
| 1079 | 0x7ff8, /* dst_mask */ |
| 1080 | FALSE), /* pcrel_offset */ |
| 1081 | |
| 1082 | /* Get to the page for the GOT entry for the symbol |
| 1083 | (G(S) - P) using an ADRP instruction. */ |
| 1084 | HOWTO (AARCH64_R (TLSGD_ADR_PAGE21), /* type */ |
| 1085 | 12, /* rightshift */ |
| 1086 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1087 | 21, /* bitsize */ |
| 1088 | TRUE, /* pc_relative */ |
| 1089 | 0, /* bitpos */ |
| 1090 | complain_overflow_dont, /* complain_on_overflow */ |
| 1091 | bfd_elf_generic_reloc, /* special_function */ |
| 1092 | AARCH64_R_STR (TLSGD_ADR_PAGE21), /* name */ |
| 1093 | FALSE, /* partial_inplace */ |
| 1094 | 0x1fffff, /* src_mask */ |
| 1095 | 0x1fffff, /* dst_mask */ |
| 1096 | TRUE), /* pcrel_offset */ |
| 1097 | |
| 1098 | HOWTO (AARCH64_R (TLSGD_ADR_PREL21), /* type */ |
| 1099 | 0, /* rightshift */ |
| 1100 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1101 | 21, /* bitsize */ |
| 1102 | TRUE, /* pc_relative */ |
| 1103 | 0, /* bitpos */ |
| 1104 | complain_overflow_dont, /* complain_on_overflow */ |
| 1105 | bfd_elf_generic_reloc, /* special_function */ |
| 1106 | AARCH64_R_STR (TLSGD_ADR_PREL21), /* name */ |
| 1107 | FALSE, /* partial_inplace */ |
| 1108 | 0x1fffff, /* src_mask */ |
| 1109 | 0x1fffff, /* dst_mask */ |
| 1110 | TRUE), /* pcrel_offset */ |
| 1111 | |
| 1112 | /* ADD: GOT offset G(S) & 0xff8 [no overflow check] */ |
| 1113 | HOWTO (AARCH64_R (TLSGD_ADD_LO12_NC), /* type */ |
| 1114 | 0, /* rightshift */ |
| 1115 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1116 | 12, /* bitsize */ |
| 1117 | FALSE, /* pc_relative */ |
| 1118 | 0, /* bitpos */ |
| 1119 | complain_overflow_dont, /* complain_on_overflow */ |
| 1120 | bfd_elf_generic_reloc, /* special_function */ |
| 1121 | AARCH64_R_STR (TLSGD_ADD_LO12_NC), /* name */ |
| 1122 | FALSE, /* partial_inplace */ |
| 1123 | 0xfff, /* src_mask */ |
| 1124 | 0xfff, /* dst_mask */ |
| 1125 | FALSE), /* pcrel_offset */ |
| 1126 | |
| 1127 | /* Lower 16 bits of GOT offset to tls_index. */ |
| 1128 | HOWTO64 (AARCH64_R (TLSGD_MOVW_G0_NC), /* type */ |
| 1129 | 0, /* rightshift */ |
| 1130 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1131 | 16, /* bitsize */ |
| 1132 | FALSE, /* pc_relative */ |
| 1133 | 0, /* bitpos */ |
| 1134 | complain_overflow_dont, /* complain_on_overflow */ |
| 1135 | bfd_elf_generic_reloc, /* special_function */ |
| 1136 | AARCH64_R_STR (TLSGD_MOVW_G0_NC), /* name */ |
| 1137 | FALSE, /* partial_inplace */ |
| 1138 | 0xffff, /* src_mask */ |
| 1139 | 0xffff, /* dst_mask */ |
| 1140 | FALSE), /* pcrel_offset */ |
| 1141 | |
| 1142 | /* Higher 16 bits of GOT offset to tls_index. */ |
| 1143 | HOWTO64 (AARCH64_R (TLSGD_MOVW_G1), /* type */ |
| 1144 | 16, /* rightshift */ |
| 1145 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1146 | 16, /* bitsize */ |
| 1147 | FALSE, /* pc_relative */ |
| 1148 | 0, /* bitpos */ |
| 1149 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 1150 | bfd_elf_generic_reloc, /* special_function */ |
| 1151 | AARCH64_R_STR (TLSGD_MOVW_G1), /* name */ |
| 1152 | FALSE, /* partial_inplace */ |
| 1153 | 0xffff, /* src_mask */ |
| 1154 | 0xffff, /* dst_mask */ |
| 1155 | FALSE), /* pcrel_offset */ |
| 1156 | |
| 1157 | HOWTO (AARCH64_R (TLSIE_ADR_GOTTPREL_PAGE21), /* type */ |
| 1158 | 12, /* rightshift */ |
| 1159 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1160 | 21, /* bitsize */ |
| 1161 | FALSE, /* pc_relative */ |
| 1162 | 0, /* bitpos */ |
| 1163 | complain_overflow_dont, /* complain_on_overflow */ |
| 1164 | bfd_elf_generic_reloc, /* special_function */ |
| 1165 | AARCH64_R_STR (TLSIE_ADR_GOTTPREL_PAGE21), /* name */ |
| 1166 | FALSE, /* partial_inplace */ |
| 1167 | 0x1fffff, /* src_mask */ |
| 1168 | 0x1fffff, /* dst_mask */ |
| 1169 | FALSE), /* pcrel_offset */ |
| 1170 | |
| 1171 | HOWTO64 (AARCH64_R (TLSIE_LD64_GOTTPREL_LO12_NC), /* type */ |
| 1172 | 3, /* rightshift */ |
| 1173 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1174 | 12, /* bitsize */ |
| 1175 | FALSE, /* pc_relative */ |
| 1176 | 0, /* bitpos */ |
| 1177 | complain_overflow_dont, /* complain_on_overflow */ |
| 1178 | bfd_elf_generic_reloc, /* special_function */ |
| 1179 | AARCH64_R_STR (TLSIE_LD64_GOTTPREL_LO12_NC), /* name */ |
| 1180 | FALSE, /* partial_inplace */ |
| 1181 | 0xff8, /* src_mask */ |
| 1182 | 0xff8, /* dst_mask */ |
| 1183 | FALSE), /* pcrel_offset */ |
| 1184 | |
| 1185 | HOWTO32 (AARCH64_R (TLSIE_LD32_GOTTPREL_LO12_NC), /* type */ |
| 1186 | 2, /* rightshift */ |
| 1187 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1188 | 12, /* bitsize */ |
| 1189 | FALSE, /* pc_relative */ |
| 1190 | 0, /* bitpos */ |
| 1191 | complain_overflow_dont, /* complain_on_overflow */ |
| 1192 | bfd_elf_generic_reloc, /* special_function */ |
| 1193 | AARCH64_R_STR (TLSIE_LD32_GOTTPREL_LO12_NC), /* name */ |
| 1194 | FALSE, /* partial_inplace */ |
| 1195 | 0xffc, /* src_mask */ |
| 1196 | 0xffc, /* dst_mask */ |
| 1197 | FALSE), /* pcrel_offset */ |
| 1198 | |
| 1199 | HOWTO (AARCH64_R (TLSIE_LD_GOTTPREL_PREL19), /* type */ |
| 1200 | 2, /* rightshift */ |
| 1201 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1202 | 19, /* bitsize */ |
| 1203 | FALSE, /* pc_relative */ |
| 1204 | 0, /* bitpos */ |
| 1205 | complain_overflow_dont, /* complain_on_overflow */ |
| 1206 | bfd_elf_generic_reloc, /* special_function */ |
| 1207 | AARCH64_R_STR (TLSIE_LD_GOTTPREL_PREL19), /* name */ |
| 1208 | FALSE, /* partial_inplace */ |
| 1209 | 0x1ffffc, /* src_mask */ |
| 1210 | 0x1ffffc, /* dst_mask */ |
| 1211 | FALSE), /* pcrel_offset */ |
| 1212 | |
| 1213 | HOWTO64 (AARCH64_R (TLSIE_MOVW_GOTTPREL_G0_NC), /* type */ |
| 1214 | 0, /* rightshift */ |
| 1215 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1216 | 16, /* bitsize */ |
| 1217 | FALSE, /* pc_relative */ |
| 1218 | 0, /* bitpos */ |
| 1219 | complain_overflow_dont, /* complain_on_overflow */ |
| 1220 | bfd_elf_generic_reloc, /* special_function */ |
| 1221 | AARCH64_R_STR (TLSIE_MOVW_GOTTPREL_G0_NC), /* name */ |
| 1222 | FALSE, /* partial_inplace */ |
| 1223 | 0xffff, /* src_mask */ |
| 1224 | 0xffff, /* dst_mask */ |
| 1225 | FALSE), /* pcrel_offset */ |
| 1226 | |
| 1227 | HOWTO64 (AARCH64_R (TLSIE_MOVW_GOTTPREL_G1), /* type */ |
| 1228 | 16, /* rightshift */ |
| 1229 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1230 | 16, /* bitsize */ |
| 1231 | FALSE, /* pc_relative */ |
| 1232 | 0, /* bitpos */ |
| 1233 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 1234 | bfd_elf_generic_reloc, /* special_function */ |
| 1235 | AARCH64_R_STR (TLSIE_MOVW_GOTTPREL_G1), /* name */ |
| 1236 | FALSE, /* partial_inplace */ |
| 1237 | 0xffff, /* src_mask */ |
| 1238 | 0xffff, /* dst_mask */ |
| 1239 | FALSE), /* pcrel_offset */ |
| 1240 | |
| 1241 | /* ADD: bit[23:12] of byte offset to module TLS base address. */ |
| 1242 | HOWTO (AARCH64_R (TLSLD_ADD_DTPREL_HI12), /* type */ |
| 1243 | 12, /* rightshift */ |
| 1244 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1245 | 12, /* bitsize */ |
| 1246 | FALSE, /* pc_relative */ |
| 1247 | 0, /* bitpos */ |
| 1248 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 1249 | bfd_elf_generic_reloc, /* special_function */ |
| 1250 | AARCH64_R_STR (TLSLD_ADD_DTPREL_HI12), /* name */ |
| 1251 | FALSE, /* partial_inplace */ |
| 1252 | 0xfff, /* src_mask */ |
| 1253 | 0xfff, /* dst_mask */ |
| 1254 | FALSE), /* pcrel_offset */ |
| 1255 | |
| 1256 | /* Unsigned 12 bit byte offset to module TLS base address. */ |
| 1257 | HOWTO (AARCH64_R (TLSLD_ADD_DTPREL_LO12), /* type */ |
| 1258 | 0, /* rightshift */ |
| 1259 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1260 | 12, /* bitsize */ |
| 1261 | FALSE, /* pc_relative */ |
| 1262 | 0, /* bitpos */ |
| 1263 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 1264 | bfd_elf_generic_reloc, /* special_function */ |
| 1265 | AARCH64_R_STR (TLSLD_ADD_DTPREL_LO12), /* name */ |
| 1266 | FALSE, /* partial_inplace */ |
| 1267 | 0xfff, /* src_mask */ |
| 1268 | 0xfff, /* dst_mask */ |
| 1269 | FALSE), /* pcrel_offset */ |
| 1270 | |
| 1271 | /* No overflow check version of BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12. */ |
| 1272 | HOWTO (AARCH64_R (TLSLD_ADD_DTPREL_LO12_NC), /* type */ |
| 1273 | 0, /* rightshift */ |
| 1274 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1275 | 12, /* bitsize */ |
| 1276 | FALSE, /* pc_relative */ |
| 1277 | 0, /* bitpos */ |
| 1278 | complain_overflow_dont, /* complain_on_overflow */ |
| 1279 | bfd_elf_generic_reloc, /* special_function */ |
| 1280 | AARCH64_R_STR (TLSLD_ADD_DTPREL_LO12_NC), /* name */ |
| 1281 | FALSE, /* partial_inplace */ |
| 1282 | 0xfff, /* src_mask */ |
| 1283 | 0xfff, /* dst_mask */ |
| 1284 | FALSE), /* pcrel_offset */ |
| 1285 | |
| 1286 | /* ADD: GOT offset G(S) & 0xff8 [no overflow check] */ |
| 1287 | HOWTO (AARCH64_R (TLSLD_ADD_LO12_NC), /* type */ |
| 1288 | 0, /* rightshift */ |
| 1289 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1290 | 12, /* bitsize */ |
| 1291 | FALSE, /* pc_relative */ |
| 1292 | 0, /* bitpos */ |
| 1293 | complain_overflow_dont, /* complain_on_overflow */ |
| 1294 | bfd_elf_generic_reloc, /* special_function */ |
| 1295 | AARCH64_R_STR (TLSLD_ADD_LO12_NC), /* name */ |
| 1296 | FALSE, /* partial_inplace */ |
| 1297 | 0xfff, /* src_mask */ |
| 1298 | 0xfff, /* dst_mask */ |
| 1299 | FALSE), /* pcrel_offset */ |
| 1300 | |
| 1301 | /* Get to the page for the GOT entry for the symbol |
| 1302 | (G(S) - P) using an ADRP instruction. */ |
| 1303 | HOWTO (AARCH64_R (TLSLD_ADR_PAGE21), /* type */ |
| 1304 | 12, /* rightshift */ |
| 1305 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1306 | 21, /* bitsize */ |
| 1307 | TRUE, /* pc_relative */ |
| 1308 | 0, /* bitpos */ |
| 1309 | complain_overflow_signed, /* complain_on_overflow */ |
| 1310 | bfd_elf_generic_reloc, /* special_function */ |
| 1311 | AARCH64_R_STR (TLSLD_ADR_PAGE21), /* name */ |
| 1312 | FALSE, /* partial_inplace */ |
| 1313 | 0x1fffff, /* src_mask */ |
| 1314 | 0x1fffff, /* dst_mask */ |
| 1315 | TRUE), /* pcrel_offset */ |
| 1316 | |
| 1317 | HOWTO (AARCH64_R (TLSLD_ADR_PREL21), /* type */ |
| 1318 | 0, /* rightshift */ |
| 1319 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1320 | 21, /* bitsize */ |
| 1321 | TRUE, /* pc_relative */ |
| 1322 | 0, /* bitpos */ |
| 1323 | complain_overflow_signed, /* complain_on_overflow */ |
| 1324 | bfd_elf_generic_reloc, /* special_function */ |
| 1325 | AARCH64_R_STR (TLSLD_ADR_PREL21), /* name */ |
| 1326 | FALSE, /* partial_inplace */ |
| 1327 | 0x1fffff, /* src_mask */ |
| 1328 | 0x1fffff, /* dst_mask */ |
| 1329 | TRUE), /* pcrel_offset */ |
| 1330 | |
| 1331 | /* LD/ST16: bit[11:1] of byte offset to module TLS base address. */ |
| 1332 | HOWTO64 (AARCH64_R (TLSLD_LDST16_DTPREL_LO12), /* type */ |
| 1333 | 1, /* rightshift */ |
| 1334 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1335 | 11, /* bitsize */ |
| 1336 | FALSE, /* pc_relative */ |
| 1337 | 10, /* bitpos */ |
| 1338 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 1339 | bfd_elf_generic_reloc, /* special_function */ |
| 1340 | AARCH64_R_STR (TLSLD_LDST16_DTPREL_LO12), /* name */ |
| 1341 | FALSE, /* partial_inplace */ |
| 1342 | 0x1ffc00, /* src_mask */ |
| 1343 | 0x1ffc00, /* dst_mask */ |
| 1344 | FALSE), /* pcrel_offset */ |
| 1345 | |
| 1346 | /* Same as BFD_RELOC_AARCH64_TLSLD_LDST16_DTPREL_LO12, but no overflow check. */ |
| 1347 | HOWTO64 (AARCH64_R (TLSLD_LDST16_DTPREL_LO12_NC), /* type */ |
| 1348 | 1, /* rightshift */ |
| 1349 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1350 | 11, /* bitsize */ |
| 1351 | FALSE, /* pc_relative */ |
| 1352 | 10, /* bitpos */ |
| 1353 | complain_overflow_dont, /* complain_on_overflow */ |
| 1354 | bfd_elf_generic_reloc, /* special_function */ |
| 1355 | AARCH64_R_STR (TLSLD_LDST16_DTPREL_LO12_NC), /* name */ |
| 1356 | FALSE, /* partial_inplace */ |
| 1357 | 0x1ffc00, /* src_mask */ |
| 1358 | 0x1ffc00, /* dst_mask */ |
| 1359 | FALSE), /* pcrel_offset */ |
| 1360 | |
| 1361 | /* LD/ST32: bit[11:2] of byte offset to module TLS base address. */ |
| 1362 | HOWTO64 (AARCH64_R (TLSLD_LDST32_DTPREL_LO12), /* type */ |
| 1363 | 2, /* rightshift */ |
| 1364 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1365 | 10, /* bitsize */ |
| 1366 | FALSE, /* pc_relative */ |
| 1367 | 10, /* bitpos */ |
| 1368 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 1369 | bfd_elf_generic_reloc, /* special_function */ |
| 1370 | AARCH64_R_STR (TLSLD_LDST32_DTPREL_LO12), /* name */ |
| 1371 | FALSE, /* partial_inplace */ |
| 1372 | 0x3ffc00, /* src_mask */ |
| 1373 | 0x3ffc00, /* dst_mask */ |
| 1374 | FALSE), /* pcrel_offset */ |
| 1375 | |
| 1376 | /* Same as BFD_RELOC_AARCH64_TLSLD_LDST32_DTPREL_LO12, but no overflow check. */ |
| 1377 | HOWTO64 (AARCH64_R (TLSLD_LDST32_DTPREL_LO12_NC), /* type */ |
| 1378 | 2, /* rightshift */ |
| 1379 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1380 | 10, /* bitsize */ |
| 1381 | FALSE, /* pc_relative */ |
| 1382 | 10, /* bitpos */ |
| 1383 | complain_overflow_dont, /* complain_on_overflow */ |
| 1384 | bfd_elf_generic_reloc, /* special_function */ |
| 1385 | AARCH64_R_STR (TLSLD_LDST32_DTPREL_LO12_NC), /* name */ |
| 1386 | FALSE, /* partial_inplace */ |
| 1387 | 0xffc00, /* src_mask */ |
| 1388 | 0xffc00, /* dst_mask */ |
| 1389 | FALSE), /* pcrel_offset */ |
| 1390 | |
| 1391 | /* LD/ST64: bit[11:3] of byte offset to module TLS base address. */ |
| 1392 | HOWTO64 (AARCH64_R (TLSLD_LDST64_DTPREL_LO12), /* type */ |
| 1393 | 3, /* rightshift */ |
| 1394 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1395 | 9, /* bitsize */ |
| 1396 | FALSE, /* pc_relative */ |
| 1397 | 10, /* bitpos */ |
| 1398 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 1399 | bfd_elf_generic_reloc, /* special_function */ |
| 1400 | AARCH64_R_STR (TLSLD_LDST64_DTPREL_LO12), /* name */ |
| 1401 | FALSE, /* partial_inplace */ |
| 1402 | 0x3ffc00, /* src_mask */ |
| 1403 | 0x3ffc00, /* dst_mask */ |
| 1404 | FALSE), /* pcrel_offset */ |
| 1405 | |
| 1406 | /* Same as BFD_RELOC_AARCH64_TLSLD_LDST64_DTPREL_LO12, but no overflow check. */ |
| 1407 | HOWTO64 (AARCH64_R (TLSLD_LDST64_DTPREL_LO12_NC), /* type */ |
| 1408 | 3, /* rightshift */ |
| 1409 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1410 | 9, /* bitsize */ |
| 1411 | FALSE, /* pc_relative */ |
| 1412 | 10, /* bitpos */ |
| 1413 | complain_overflow_dont, /* complain_on_overflow */ |
| 1414 | bfd_elf_generic_reloc, /* special_function */ |
| 1415 | AARCH64_R_STR (TLSLD_LDST64_DTPREL_LO12_NC), /* name */ |
| 1416 | FALSE, /* partial_inplace */ |
| 1417 | 0x7fc00, /* src_mask */ |
| 1418 | 0x7fc00, /* dst_mask */ |
| 1419 | FALSE), /* pcrel_offset */ |
| 1420 | |
| 1421 | /* LD/ST8: bit[11:0] of byte offset to module TLS base address. */ |
| 1422 | HOWTO64 (AARCH64_R (TLSLD_LDST8_DTPREL_LO12), /* type */ |
| 1423 | 0, /* rightshift */ |
| 1424 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1425 | 12, /* bitsize */ |
| 1426 | FALSE, /* pc_relative */ |
| 1427 | 10, /* bitpos */ |
| 1428 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 1429 | bfd_elf_generic_reloc, /* special_function */ |
| 1430 | AARCH64_R_STR (TLSLD_LDST8_DTPREL_LO12), /* name */ |
| 1431 | FALSE, /* partial_inplace */ |
| 1432 | 0x3ffc00, /* src_mask */ |
| 1433 | 0x3ffc00, /* dst_mask */ |
| 1434 | FALSE), /* pcrel_offset */ |
| 1435 | |
| 1436 | /* Same as BFD_RELOC_AARCH64_TLSLD_LDST8_DTPREL_LO12, but no overflow check. */ |
| 1437 | HOWTO64 (AARCH64_R (TLSLD_LDST8_DTPREL_LO12_NC), /* type */ |
| 1438 | 0, /* rightshift */ |
| 1439 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1440 | 12, /* bitsize */ |
| 1441 | FALSE, /* pc_relative */ |
| 1442 | 10, /* bitpos */ |
| 1443 | complain_overflow_dont, /* complain_on_overflow */ |
| 1444 | bfd_elf_generic_reloc, /* special_function */ |
| 1445 | AARCH64_R_STR (TLSLD_LDST8_DTPREL_LO12_NC), /* name */ |
| 1446 | FALSE, /* partial_inplace */ |
| 1447 | 0x3ffc00, /* src_mask */ |
| 1448 | 0x3ffc00, /* dst_mask */ |
| 1449 | FALSE), /* pcrel_offset */ |
| 1450 | |
| 1451 | /* MOVZ: bit[15:0] of byte offset to module TLS base address. */ |
| 1452 | HOWTO (AARCH64_R (TLSLD_MOVW_DTPREL_G0), /* type */ |
| 1453 | 0, /* rightshift */ |
| 1454 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1455 | 16, /* bitsize */ |
| 1456 | FALSE, /* pc_relative */ |
| 1457 | 0, /* bitpos */ |
| 1458 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 1459 | bfd_elf_generic_reloc, /* special_function */ |
| 1460 | AARCH64_R_STR (TLSLD_MOVW_DTPREL_G0), /* name */ |
| 1461 | FALSE, /* partial_inplace */ |
| 1462 | 0xffff, /* src_mask */ |
| 1463 | 0xffff, /* dst_mask */ |
| 1464 | FALSE), /* pcrel_offset */ |
| 1465 | |
| 1466 | /* No overflow check version of BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G0. */ |
| 1467 | HOWTO (AARCH64_R (TLSLD_MOVW_DTPREL_G0_NC), /* type */ |
| 1468 | 0, /* rightshift */ |
| 1469 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1470 | 16, /* bitsize */ |
| 1471 | FALSE, /* pc_relative */ |
| 1472 | 0, /* bitpos */ |
| 1473 | complain_overflow_dont, /* complain_on_overflow */ |
| 1474 | bfd_elf_generic_reloc, /* special_function */ |
| 1475 | AARCH64_R_STR (TLSLD_MOVW_DTPREL_G0_NC), /* name */ |
| 1476 | FALSE, /* partial_inplace */ |
| 1477 | 0xffff, /* src_mask */ |
| 1478 | 0xffff, /* dst_mask */ |
| 1479 | FALSE), /* pcrel_offset */ |
| 1480 | |
| 1481 | /* MOVZ: bit[31:16] of byte offset to module TLS base address. */ |
| 1482 | HOWTO (AARCH64_R (TLSLD_MOVW_DTPREL_G1), /* type */ |
| 1483 | 16, /* rightshift */ |
| 1484 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1485 | 16, /* bitsize */ |
| 1486 | FALSE, /* pc_relative */ |
| 1487 | 0, /* bitpos */ |
| 1488 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 1489 | bfd_elf_generic_reloc, /* special_function */ |
| 1490 | AARCH64_R_STR (TLSLD_MOVW_DTPREL_G1), /* name */ |
| 1491 | FALSE, /* partial_inplace */ |
| 1492 | 0xffff, /* src_mask */ |
| 1493 | 0xffff, /* dst_mask */ |
| 1494 | FALSE), /* pcrel_offset */ |
| 1495 | |
| 1496 | /* No overflow check version of BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G1. */ |
| 1497 | HOWTO64 (AARCH64_R (TLSLD_MOVW_DTPREL_G1_NC), /* type */ |
| 1498 | 16, /* rightshift */ |
| 1499 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1500 | 16, /* bitsize */ |
| 1501 | FALSE, /* pc_relative */ |
| 1502 | 0, /* bitpos */ |
| 1503 | complain_overflow_dont, /* complain_on_overflow */ |
| 1504 | bfd_elf_generic_reloc, /* special_function */ |
| 1505 | AARCH64_R_STR (TLSLD_MOVW_DTPREL_G1_NC), /* name */ |
| 1506 | FALSE, /* partial_inplace */ |
| 1507 | 0xffff, /* src_mask */ |
| 1508 | 0xffff, /* dst_mask */ |
| 1509 | FALSE), /* pcrel_offset */ |
| 1510 | |
| 1511 | /* MOVZ: bit[47:32] of byte offset to module TLS base address. */ |
| 1512 | HOWTO64 (AARCH64_R (TLSLD_MOVW_DTPREL_G2), /* type */ |
| 1513 | 32, /* rightshift */ |
| 1514 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1515 | 16, /* bitsize */ |
| 1516 | FALSE, /* pc_relative */ |
| 1517 | 0, /* bitpos */ |
| 1518 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 1519 | bfd_elf_generic_reloc, /* special_function */ |
| 1520 | AARCH64_R_STR (TLSLD_MOVW_DTPREL_G2), /* name */ |
| 1521 | FALSE, /* partial_inplace */ |
| 1522 | 0xffff, /* src_mask */ |
| 1523 | 0xffff, /* dst_mask */ |
| 1524 | FALSE), /* pcrel_offset */ |
| 1525 | |
| 1526 | HOWTO64 (AARCH64_R (TLSLE_MOVW_TPREL_G2), /* type */ |
| 1527 | 32, /* rightshift */ |
| 1528 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1529 | 16, /* bitsize */ |
| 1530 | FALSE, /* pc_relative */ |
| 1531 | 0, /* bitpos */ |
| 1532 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 1533 | bfd_elf_generic_reloc, /* special_function */ |
| 1534 | AARCH64_R_STR (TLSLE_MOVW_TPREL_G2), /* name */ |
| 1535 | FALSE, /* partial_inplace */ |
| 1536 | 0xffff, /* src_mask */ |
| 1537 | 0xffff, /* dst_mask */ |
| 1538 | FALSE), /* pcrel_offset */ |
| 1539 | |
| 1540 | HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G1), /* type */ |
| 1541 | 16, /* rightshift */ |
| 1542 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1543 | 16, /* bitsize */ |
| 1544 | FALSE, /* pc_relative */ |
| 1545 | 0, /* bitpos */ |
| 1546 | complain_overflow_dont, /* complain_on_overflow */ |
| 1547 | bfd_elf_generic_reloc, /* special_function */ |
| 1548 | AARCH64_R_STR (TLSLE_MOVW_TPREL_G1), /* name */ |
| 1549 | FALSE, /* partial_inplace */ |
| 1550 | 0xffff, /* src_mask */ |
| 1551 | 0xffff, /* dst_mask */ |
| 1552 | FALSE), /* pcrel_offset */ |
| 1553 | |
| 1554 | HOWTO64 (AARCH64_R (TLSLE_MOVW_TPREL_G1_NC), /* type */ |
| 1555 | 16, /* rightshift */ |
| 1556 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1557 | 16, /* bitsize */ |
| 1558 | FALSE, /* pc_relative */ |
| 1559 | 0, /* bitpos */ |
| 1560 | complain_overflow_dont, /* complain_on_overflow */ |
| 1561 | bfd_elf_generic_reloc, /* special_function */ |
| 1562 | AARCH64_R_STR (TLSLE_MOVW_TPREL_G1_NC), /* name */ |
| 1563 | FALSE, /* partial_inplace */ |
| 1564 | 0xffff, /* src_mask */ |
| 1565 | 0xffff, /* dst_mask */ |
| 1566 | FALSE), /* pcrel_offset */ |
| 1567 | |
| 1568 | HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G0), /* type */ |
| 1569 | 0, /* rightshift */ |
| 1570 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1571 | 16, /* bitsize */ |
| 1572 | FALSE, /* pc_relative */ |
| 1573 | 0, /* bitpos */ |
| 1574 | complain_overflow_dont, /* complain_on_overflow */ |
| 1575 | bfd_elf_generic_reloc, /* special_function */ |
| 1576 | AARCH64_R_STR (TLSLE_MOVW_TPREL_G0), /* name */ |
| 1577 | FALSE, /* partial_inplace */ |
| 1578 | 0xffff, /* src_mask */ |
| 1579 | 0xffff, /* dst_mask */ |
| 1580 | FALSE), /* pcrel_offset */ |
| 1581 | |
| 1582 | HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G0_NC), /* type */ |
| 1583 | 0, /* rightshift */ |
| 1584 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1585 | 16, /* bitsize */ |
| 1586 | FALSE, /* pc_relative */ |
| 1587 | 0, /* bitpos */ |
| 1588 | complain_overflow_dont, /* complain_on_overflow */ |
| 1589 | bfd_elf_generic_reloc, /* special_function */ |
| 1590 | AARCH64_R_STR (TLSLE_MOVW_TPREL_G0_NC), /* name */ |
| 1591 | FALSE, /* partial_inplace */ |
| 1592 | 0xffff, /* src_mask */ |
| 1593 | 0xffff, /* dst_mask */ |
| 1594 | FALSE), /* pcrel_offset */ |
| 1595 | |
| 1596 | HOWTO (AARCH64_R (TLSLE_ADD_TPREL_HI12), /* type */ |
| 1597 | 12, /* rightshift */ |
| 1598 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1599 | 12, /* bitsize */ |
| 1600 | FALSE, /* pc_relative */ |
| 1601 | 0, /* bitpos */ |
| 1602 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 1603 | bfd_elf_generic_reloc, /* special_function */ |
| 1604 | AARCH64_R_STR (TLSLE_ADD_TPREL_HI12), /* name */ |
| 1605 | FALSE, /* partial_inplace */ |
| 1606 | 0xfff, /* src_mask */ |
| 1607 | 0xfff, /* dst_mask */ |
| 1608 | FALSE), /* pcrel_offset */ |
| 1609 | |
| 1610 | HOWTO (AARCH64_R (TLSLE_ADD_TPREL_LO12), /* type */ |
| 1611 | 0, /* rightshift */ |
| 1612 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1613 | 12, /* bitsize */ |
| 1614 | FALSE, /* pc_relative */ |
| 1615 | 0, /* bitpos */ |
| 1616 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 1617 | bfd_elf_generic_reloc, /* special_function */ |
| 1618 | AARCH64_R_STR (TLSLE_ADD_TPREL_LO12), /* name */ |
| 1619 | FALSE, /* partial_inplace */ |
| 1620 | 0xfff, /* src_mask */ |
| 1621 | 0xfff, /* dst_mask */ |
| 1622 | FALSE), /* pcrel_offset */ |
| 1623 | |
| 1624 | HOWTO (AARCH64_R (TLSLE_ADD_TPREL_LO12_NC), /* type */ |
| 1625 | 0, /* rightshift */ |
| 1626 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1627 | 12, /* bitsize */ |
| 1628 | FALSE, /* pc_relative */ |
| 1629 | 0, /* bitpos */ |
| 1630 | complain_overflow_dont, /* complain_on_overflow */ |
| 1631 | bfd_elf_generic_reloc, /* special_function */ |
| 1632 | AARCH64_R_STR (TLSLE_ADD_TPREL_LO12_NC), /* name */ |
| 1633 | FALSE, /* partial_inplace */ |
| 1634 | 0xfff, /* src_mask */ |
| 1635 | 0xfff, /* dst_mask */ |
| 1636 | FALSE), /* pcrel_offset */ |
| 1637 | |
| 1638 | HOWTO (AARCH64_R (TLSDESC_LD_PREL19), /* type */ |
| 1639 | 2, /* rightshift */ |
| 1640 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1641 | 19, /* bitsize */ |
| 1642 | TRUE, /* pc_relative */ |
| 1643 | 0, /* bitpos */ |
| 1644 | complain_overflow_dont, /* complain_on_overflow */ |
| 1645 | bfd_elf_generic_reloc, /* special_function */ |
| 1646 | AARCH64_R_STR (TLSDESC_LD_PREL19), /* name */ |
| 1647 | FALSE, /* partial_inplace */ |
| 1648 | 0x0ffffe0, /* src_mask */ |
| 1649 | 0x0ffffe0, /* dst_mask */ |
| 1650 | TRUE), /* pcrel_offset */ |
| 1651 | |
| 1652 | HOWTO (AARCH64_R (TLSDESC_ADR_PREL21), /* type */ |
| 1653 | 0, /* rightshift */ |
| 1654 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1655 | 21, /* bitsize */ |
| 1656 | TRUE, /* pc_relative */ |
| 1657 | 0, /* bitpos */ |
| 1658 | complain_overflow_dont, /* complain_on_overflow */ |
| 1659 | bfd_elf_generic_reloc, /* special_function */ |
| 1660 | AARCH64_R_STR (TLSDESC_ADR_PREL21), /* name */ |
| 1661 | FALSE, /* partial_inplace */ |
| 1662 | 0x1fffff, /* src_mask */ |
| 1663 | 0x1fffff, /* dst_mask */ |
| 1664 | TRUE), /* pcrel_offset */ |
| 1665 | |
| 1666 | /* Get to the page for the GOT entry for the symbol |
| 1667 | (G(S) - P) using an ADRP instruction. */ |
| 1668 | HOWTO (AARCH64_R (TLSDESC_ADR_PAGE21), /* type */ |
| 1669 | 12, /* rightshift */ |
| 1670 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1671 | 21, /* bitsize */ |
| 1672 | TRUE, /* pc_relative */ |
| 1673 | 0, /* bitpos */ |
| 1674 | complain_overflow_dont, /* complain_on_overflow */ |
| 1675 | bfd_elf_generic_reloc, /* special_function */ |
| 1676 | AARCH64_R_STR (TLSDESC_ADR_PAGE21), /* name */ |
| 1677 | FALSE, /* partial_inplace */ |
| 1678 | 0x1fffff, /* src_mask */ |
| 1679 | 0x1fffff, /* dst_mask */ |
| 1680 | TRUE), /* pcrel_offset */ |
| 1681 | |
| 1682 | /* LD64: GOT offset G(S) & 0xff8. */ |
| 1683 | HOWTO64 (AARCH64_R (TLSDESC_LD64_LO12), /* type */ |
| 1684 | 3, /* rightshift */ |
| 1685 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1686 | 12, /* bitsize */ |
| 1687 | FALSE, /* pc_relative */ |
| 1688 | 0, /* bitpos */ |
| 1689 | complain_overflow_dont, /* complain_on_overflow */ |
| 1690 | bfd_elf_generic_reloc, /* special_function */ |
| 1691 | AARCH64_R_STR (TLSDESC_LD64_LO12), /* name */ |
| 1692 | FALSE, /* partial_inplace */ |
| 1693 | 0xff8, /* src_mask */ |
| 1694 | 0xff8, /* dst_mask */ |
| 1695 | FALSE), /* pcrel_offset */ |
| 1696 | |
| 1697 | /* LD32: GOT offset G(S) & 0xffc. */ |
| 1698 | HOWTO32 (AARCH64_R (TLSDESC_LD32_LO12_NC), /* type */ |
| 1699 | 2, /* rightshift */ |
| 1700 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1701 | 12, /* bitsize */ |
| 1702 | FALSE, /* pc_relative */ |
| 1703 | 0, /* bitpos */ |
| 1704 | complain_overflow_dont, /* complain_on_overflow */ |
| 1705 | bfd_elf_generic_reloc, /* special_function */ |
| 1706 | AARCH64_R_STR (TLSDESC_LD32_LO12_NC), /* name */ |
| 1707 | FALSE, /* partial_inplace */ |
| 1708 | 0xffc, /* src_mask */ |
| 1709 | 0xffc, /* dst_mask */ |
| 1710 | FALSE), /* pcrel_offset */ |
| 1711 | |
| 1712 | /* ADD: GOT offset G(S) & 0xfff. */ |
| 1713 | HOWTO (AARCH64_R (TLSDESC_ADD_LO12), /* type */ |
| 1714 | 0, /* rightshift */ |
| 1715 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1716 | 12, /* bitsize */ |
| 1717 | FALSE, /* pc_relative */ |
| 1718 | 0, /* bitpos */ |
| 1719 | complain_overflow_dont,/* complain_on_overflow */ |
| 1720 | bfd_elf_generic_reloc, /* special_function */ |
| 1721 | AARCH64_R_STR (TLSDESC_ADD_LO12), /* name */ |
| 1722 | FALSE, /* partial_inplace */ |
| 1723 | 0xfff, /* src_mask */ |
| 1724 | 0xfff, /* dst_mask */ |
| 1725 | FALSE), /* pcrel_offset */ |
| 1726 | |
| 1727 | HOWTO64 (AARCH64_R (TLSDESC_OFF_G1), /* type */ |
| 1728 | 16, /* rightshift */ |
| 1729 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1730 | 12, /* bitsize */ |
| 1731 | FALSE, /* pc_relative */ |
| 1732 | 0, /* bitpos */ |
| 1733 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 1734 | bfd_elf_generic_reloc, /* special_function */ |
| 1735 | AARCH64_R_STR (TLSDESC_OFF_G1), /* name */ |
| 1736 | FALSE, /* partial_inplace */ |
| 1737 | 0xffff, /* src_mask */ |
| 1738 | 0xffff, /* dst_mask */ |
| 1739 | FALSE), /* pcrel_offset */ |
| 1740 | |
| 1741 | HOWTO64 (AARCH64_R (TLSDESC_OFF_G0_NC), /* type */ |
| 1742 | 0, /* rightshift */ |
| 1743 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1744 | 12, /* bitsize */ |
| 1745 | FALSE, /* pc_relative */ |
| 1746 | 0, /* bitpos */ |
| 1747 | complain_overflow_dont, /* complain_on_overflow */ |
| 1748 | bfd_elf_generic_reloc, /* special_function */ |
| 1749 | AARCH64_R_STR (TLSDESC_OFF_G0_NC), /* name */ |
| 1750 | FALSE, /* partial_inplace */ |
| 1751 | 0xffff, /* src_mask */ |
| 1752 | 0xffff, /* dst_mask */ |
| 1753 | FALSE), /* pcrel_offset */ |
| 1754 | |
| 1755 | HOWTO64 (AARCH64_R (TLSDESC_LDR), /* type */ |
| 1756 | 0, /* rightshift */ |
| 1757 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1758 | 12, /* bitsize */ |
| 1759 | FALSE, /* pc_relative */ |
| 1760 | 0, /* bitpos */ |
| 1761 | complain_overflow_dont, /* complain_on_overflow */ |
| 1762 | bfd_elf_generic_reloc, /* special_function */ |
| 1763 | AARCH64_R_STR (TLSDESC_LDR), /* name */ |
| 1764 | FALSE, /* partial_inplace */ |
| 1765 | 0x0, /* src_mask */ |
| 1766 | 0x0, /* dst_mask */ |
| 1767 | FALSE), /* pcrel_offset */ |
| 1768 | |
| 1769 | HOWTO64 (AARCH64_R (TLSDESC_ADD), /* type */ |
| 1770 | 0, /* rightshift */ |
| 1771 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1772 | 12, /* bitsize */ |
| 1773 | FALSE, /* pc_relative */ |
| 1774 | 0, /* bitpos */ |
| 1775 | complain_overflow_dont, /* complain_on_overflow */ |
| 1776 | bfd_elf_generic_reloc, /* special_function */ |
| 1777 | AARCH64_R_STR (TLSDESC_ADD), /* name */ |
| 1778 | FALSE, /* partial_inplace */ |
| 1779 | 0x0, /* src_mask */ |
| 1780 | 0x0, /* dst_mask */ |
| 1781 | FALSE), /* pcrel_offset */ |
| 1782 | |
| 1783 | HOWTO (AARCH64_R (TLSDESC_CALL), /* type */ |
| 1784 | 0, /* rightshift */ |
| 1785 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1786 | 0, /* bitsize */ |
| 1787 | FALSE, /* pc_relative */ |
| 1788 | 0, /* bitpos */ |
| 1789 | complain_overflow_dont, /* complain_on_overflow */ |
| 1790 | bfd_elf_generic_reloc, /* special_function */ |
| 1791 | AARCH64_R_STR (TLSDESC_CALL), /* name */ |
| 1792 | FALSE, /* partial_inplace */ |
| 1793 | 0x0, /* src_mask */ |
| 1794 | 0x0, /* dst_mask */ |
| 1795 | FALSE), /* pcrel_offset */ |
| 1796 | |
| 1797 | HOWTO (AARCH64_R (COPY), /* type */ |
| 1798 | 0, /* rightshift */ |
| 1799 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1800 | 64, /* bitsize */ |
| 1801 | FALSE, /* pc_relative */ |
| 1802 | 0, /* bitpos */ |
| 1803 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 1804 | bfd_elf_generic_reloc, /* special_function */ |
| 1805 | AARCH64_R_STR (COPY), /* name */ |
| 1806 | TRUE, /* partial_inplace */ |
| 1807 | 0xffffffff, /* src_mask */ |
| 1808 | 0xffffffff, /* dst_mask */ |
| 1809 | FALSE), /* pcrel_offset */ |
| 1810 | |
| 1811 | HOWTO (AARCH64_R (GLOB_DAT), /* type */ |
| 1812 | 0, /* rightshift */ |
| 1813 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1814 | 64, /* bitsize */ |
| 1815 | FALSE, /* pc_relative */ |
| 1816 | 0, /* bitpos */ |
| 1817 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 1818 | bfd_elf_generic_reloc, /* special_function */ |
| 1819 | AARCH64_R_STR (GLOB_DAT), /* name */ |
| 1820 | TRUE, /* partial_inplace */ |
| 1821 | 0xffffffff, /* src_mask */ |
| 1822 | 0xffffffff, /* dst_mask */ |
| 1823 | FALSE), /* pcrel_offset */ |
| 1824 | |
| 1825 | HOWTO (AARCH64_R (JUMP_SLOT), /* type */ |
| 1826 | 0, /* rightshift */ |
| 1827 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1828 | 64, /* bitsize */ |
| 1829 | FALSE, /* pc_relative */ |
| 1830 | 0, /* bitpos */ |
| 1831 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 1832 | bfd_elf_generic_reloc, /* special_function */ |
| 1833 | AARCH64_R_STR (JUMP_SLOT), /* name */ |
| 1834 | TRUE, /* partial_inplace */ |
| 1835 | 0xffffffff, /* src_mask */ |
| 1836 | 0xffffffff, /* dst_mask */ |
| 1837 | FALSE), /* pcrel_offset */ |
| 1838 | |
| 1839 | HOWTO (AARCH64_R (RELATIVE), /* type */ |
| 1840 | 0, /* rightshift */ |
| 1841 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1842 | 64, /* bitsize */ |
| 1843 | FALSE, /* pc_relative */ |
| 1844 | 0, /* bitpos */ |
| 1845 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 1846 | bfd_elf_generic_reloc, /* special_function */ |
| 1847 | AARCH64_R_STR (RELATIVE), /* name */ |
| 1848 | TRUE, /* partial_inplace */ |
| 1849 | ALL_ONES, /* src_mask */ |
| 1850 | ALL_ONES, /* dst_mask */ |
| 1851 | FALSE), /* pcrel_offset */ |
| 1852 | |
| 1853 | HOWTO (AARCH64_R (TLS_DTPMOD), /* type */ |
| 1854 | 0, /* rightshift */ |
| 1855 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1856 | 64, /* bitsize */ |
| 1857 | FALSE, /* pc_relative */ |
| 1858 | 0, /* bitpos */ |
| 1859 | complain_overflow_dont, /* complain_on_overflow */ |
| 1860 | bfd_elf_generic_reloc, /* special_function */ |
| 1861 | #if ARCH_SIZE == 64 |
| 1862 | AARCH64_R_STR (TLS_DTPMOD64), /* name */ |
| 1863 | #else |
| 1864 | AARCH64_R_STR (TLS_DTPMOD), /* name */ |
| 1865 | #endif |
| 1866 | FALSE, /* partial_inplace */ |
| 1867 | 0, /* src_mask */ |
| 1868 | ALL_ONES, /* dst_mask */ |
| 1869 | FALSE), /* pc_reloffset */ |
| 1870 | |
| 1871 | HOWTO (AARCH64_R (TLS_DTPREL), /* type */ |
| 1872 | 0, /* rightshift */ |
| 1873 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1874 | 64, /* bitsize */ |
| 1875 | FALSE, /* pc_relative */ |
| 1876 | 0, /* bitpos */ |
| 1877 | complain_overflow_dont, /* complain_on_overflow */ |
| 1878 | bfd_elf_generic_reloc, /* special_function */ |
| 1879 | #if ARCH_SIZE == 64 |
| 1880 | AARCH64_R_STR (TLS_DTPREL64), /* name */ |
| 1881 | #else |
| 1882 | AARCH64_R_STR (TLS_DTPREL), /* name */ |
| 1883 | #endif |
| 1884 | FALSE, /* partial_inplace */ |
| 1885 | 0, /* src_mask */ |
| 1886 | ALL_ONES, /* dst_mask */ |
| 1887 | FALSE), /* pcrel_offset */ |
| 1888 | |
| 1889 | HOWTO (AARCH64_R (TLS_TPREL), /* type */ |
| 1890 | 0, /* rightshift */ |
| 1891 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1892 | 64, /* bitsize */ |
| 1893 | FALSE, /* pc_relative */ |
| 1894 | 0, /* bitpos */ |
| 1895 | complain_overflow_dont, /* complain_on_overflow */ |
| 1896 | bfd_elf_generic_reloc, /* special_function */ |
| 1897 | #if ARCH_SIZE == 64 |
| 1898 | AARCH64_R_STR (TLS_TPREL64), /* name */ |
| 1899 | #else |
| 1900 | AARCH64_R_STR (TLS_TPREL), /* name */ |
| 1901 | #endif |
| 1902 | FALSE, /* partial_inplace */ |
| 1903 | 0, /* src_mask */ |
| 1904 | ALL_ONES, /* dst_mask */ |
| 1905 | FALSE), /* pcrel_offset */ |
| 1906 | |
| 1907 | HOWTO (AARCH64_R (TLSDESC), /* type */ |
| 1908 | 0, /* rightshift */ |
| 1909 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1910 | 64, /* bitsize */ |
| 1911 | FALSE, /* pc_relative */ |
| 1912 | 0, /* bitpos */ |
| 1913 | complain_overflow_dont, /* complain_on_overflow */ |
| 1914 | bfd_elf_generic_reloc, /* special_function */ |
| 1915 | AARCH64_R_STR (TLSDESC), /* name */ |
| 1916 | FALSE, /* partial_inplace */ |
| 1917 | 0, /* src_mask */ |
| 1918 | ALL_ONES, /* dst_mask */ |
| 1919 | FALSE), /* pcrel_offset */ |
| 1920 | |
| 1921 | HOWTO (AARCH64_R (IRELATIVE), /* type */ |
| 1922 | 0, /* rightshift */ |
| 1923 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1924 | 64, /* bitsize */ |
| 1925 | FALSE, /* pc_relative */ |
| 1926 | 0, /* bitpos */ |
| 1927 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 1928 | bfd_elf_generic_reloc, /* special_function */ |
| 1929 | AARCH64_R_STR (IRELATIVE), /* name */ |
| 1930 | FALSE, /* partial_inplace */ |
| 1931 | 0, /* src_mask */ |
| 1932 | ALL_ONES, /* dst_mask */ |
| 1933 | FALSE), /* pcrel_offset */ |
| 1934 | |
| 1935 | EMPTY_HOWTO (0), |
| 1936 | }; |
| 1937 | |
| 1938 | static reloc_howto_type elfNN_aarch64_howto_none = |
| 1939 | HOWTO (R_AARCH64_NONE, /* type */ |
| 1940 | 0, /* rightshift */ |
| 1941 | 3, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1942 | 0, /* bitsize */ |
| 1943 | FALSE, /* pc_relative */ |
| 1944 | 0, /* bitpos */ |
| 1945 | complain_overflow_dont,/* complain_on_overflow */ |
| 1946 | bfd_elf_generic_reloc, /* special_function */ |
| 1947 | "R_AARCH64_NONE", /* name */ |
| 1948 | FALSE, /* partial_inplace */ |
| 1949 | 0, /* src_mask */ |
| 1950 | 0, /* dst_mask */ |
| 1951 | FALSE); /* pcrel_offset */ |
| 1952 | |
| 1953 | /* Given HOWTO, return the bfd internal relocation enumerator. */ |
| 1954 | |
| 1955 | static bfd_reloc_code_real_type |
| 1956 | elfNN_aarch64_bfd_reloc_from_howto (reloc_howto_type *howto) |
| 1957 | { |
| 1958 | const int size |
| 1959 | = (int) ARRAY_SIZE (elfNN_aarch64_howto_table); |
| 1960 | const ptrdiff_t offset |
| 1961 | = howto - elfNN_aarch64_howto_table; |
| 1962 | |
| 1963 | if (offset > 0 && offset < size - 1) |
| 1964 | return BFD_RELOC_AARCH64_RELOC_START + offset; |
| 1965 | |
| 1966 | if (howto == &elfNN_aarch64_howto_none) |
| 1967 | return BFD_RELOC_AARCH64_NONE; |
| 1968 | |
| 1969 | return BFD_RELOC_AARCH64_RELOC_START; |
| 1970 | } |
| 1971 | |
| 1972 | /* Given R_TYPE, return the bfd internal relocation enumerator. */ |
| 1973 | |
| 1974 | static bfd_reloc_code_real_type |
| 1975 | elfNN_aarch64_bfd_reloc_from_type (bfd *abfd, unsigned int r_type) |
| 1976 | { |
| 1977 | static bfd_boolean initialized_p = FALSE; |
| 1978 | /* Indexed by R_TYPE, values are offsets in the howto_table. */ |
| 1979 | static unsigned int offsets[R_AARCH64_end]; |
| 1980 | |
| 1981 | if (!initialized_p) |
| 1982 | { |
| 1983 | unsigned int i; |
| 1984 | |
| 1985 | for (i = 1; i < ARRAY_SIZE (elfNN_aarch64_howto_table) - 1; ++i) |
| 1986 | if (elfNN_aarch64_howto_table[i].type != 0) |
| 1987 | offsets[elfNN_aarch64_howto_table[i].type] = i; |
| 1988 | |
| 1989 | initialized_p = TRUE; |
| 1990 | } |
| 1991 | |
| 1992 | if (r_type == R_AARCH64_NONE || r_type == R_AARCH64_NULL) |
| 1993 | return BFD_RELOC_AARCH64_NONE; |
| 1994 | |
| 1995 | /* PR 17512: file: b371e70a. */ |
| 1996 | if (r_type >= R_AARCH64_end) |
| 1997 | { |
| 1998 | _bfd_error_handler (_("%pB: unsupported relocation type %#x"), |
| 1999 | abfd, r_type); |
| 2000 | bfd_set_error (bfd_error_bad_value); |
| 2001 | return BFD_RELOC_AARCH64_NONE; |
| 2002 | } |
| 2003 | |
| 2004 | return BFD_RELOC_AARCH64_RELOC_START + offsets[r_type]; |
| 2005 | } |
| 2006 | |
| 2007 | struct elf_aarch64_reloc_map |
| 2008 | { |
| 2009 | bfd_reloc_code_real_type from; |
| 2010 | bfd_reloc_code_real_type to; |
| 2011 | }; |
| 2012 | |
| 2013 | /* Map bfd generic reloc to AArch64-specific reloc. */ |
| 2014 | static const struct elf_aarch64_reloc_map elf_aarch64_reloc_map[] = |
| 2015 | { |
| 2016 | {BFD_RELOC_NONE, BFD_RELOC_AARCH64_NONE}, |
| 2017 | |
| 2018 | /* Basic data relocations. */ |
| 2019 | {BFD_RELOC_CTOR, BFD_RELOC_AARCH64_NN}, |
| 2020 | {BFD_RELOC_64, BFD_RELOC_AARCH64_64}, |
| 2021 | {BFD_RELOC_32, BFD_RELOC_AARCH64_32}, |
| 2022 | {BFD_RELOC_16, BFD_RELOC_AARCH64_16}, |
| 2023 | {BFD_RELOC_64_PCREL, BFD_RELOC_AARCH64_64_PCREL}, |
| 2024 | {BFD_RELOC_32_PCREL, BFD_RELOC_AARCH64_32_PCREL}, |
| 2025 | {BFD_RELOC_16_PCREL, BFD_RELOC_AARCH64_16_PCREL}, |
| 2026 | }; |
| 2027 | |
| 2028 | /* Given the bfd internal relocation enumerator in CODE, return the |
| 2029 | corresponding howto entry. */ |
| 2030 | |
| 2031 | static reloc_howto_type * |
| 2032 | elfNN_aarch64_howto_from_bfd_reloc (bfd_reloc_code_real_type code) |
| 2033 | { |
| 2034 | unsigned int i; |
| 2035 | |
| 2036 | /* Convert bfd generic reloc to AArch64-specific reloc. */ |
| 2037 | if (code < BFD_RELOC_AARCH64_RELOC_START |
| 2038 | || code > BFD_RELOC_AARCH64_RELOC_END) |
| 2039 | for (i = 0; i < ARRAY_SIZE (elf_aarch64_reloc_map); i++) |
| 2040 | if (elf_aarch64_reloc_map[i].from == code) |
| 2041 | { |
| 2042 | code = elf_aarch64_reloc_map[i].to; |
| 2043 | break; |
| 2044 | } |
| 2045 | |
| 2046 | if (code > BFD_RELOC_AARCH64_RELOC_START |
| 2047 | && code < BFD_RELOC_AARCH64_RELOC_END) |
| 2048 | if (elfNN_aarch64_howto_table[code - BFD_RELOC_AARCH64_RELOC_START].type) |
| 2049 | return &elfNN_aarch64_howto_table[code - BFD_RELOC_AARCH64_RELOC_START]; |
| 2050 | |
| 2051 | if (code == BFD_RELOC_AARCH64_NONE) |
| 2052 | return &elfNN_aarch64_howto_none; |
| 2053 | |
| 2054 | return NULL; |
| 2055 | } |
| 2056 | |
| 2057 | static reloc_howto_type * |
| 2058 | elfNN_aarch64_howto_from_type (bfd *abfd, unsigned int r_type) |
| 2059 | { |
| 2060 | bfd_reloc_code_real_type val; |
| 2061 | reloc_howto_type *howto; |
| 2062 | |
| 2063 | #if ARCH_SIZE == 32 |
| 2064 | if (r_type > 256) |
| 2065 | { |
| 2066 | bfd_set_error (bfd_error_bad_value); |
| 2067 | return NULL; |
| 2068 | } |
| 2069 | #endif |
| 2070 | |
| 2071 | if (r_type == R_AARCH64_NONE) |
| 2072 | return &elfNN_aarch64_howto_none; |
| 2073 | |
| 2074 | val = elfNN_aarch64_bfd_reloc_from_type (abfd, r_type); |
| 2075 | howto = elfNN_aarch64_howto_from_bfd_reloc (val); |
| 2076 | |
| 2077 | if (howto != NULL) |
| 2078 | return howto; |
| 2079 | |
| 2080 | bfd_set_error (bfd_error_bad_value); |
| 2081 | return NULL; |
| 2082 | } |
| 2083 | |
| 2084 | static bfd_boolean |
| 2085 | elfNN_aarch64_info_to_howto (bfd *abfd, arelent *bfd_reloc, |
| 2086 | Elf_Internal_Rela *elf_reloc) |
| 2087 | { |
| 2088 | unsigned int r_type; |
| 2089 | |
| 2090 | r_type = ELFNN_R_TYPE (elf_reloc->r_info); |
| 2091 | bfd_reloc->howto = elfNN_aarch64_howto_from_type (abfd, r_type); |
| 2092 | |
| 2093 | if (bfd_reloc->howto == NULL) |
| 2094 | { |
| 2095 | /* xgettext:c-format */ |
| 2096 | _bfd_error_handler (_("%pB: unsupported relocation type %#x"), abfd, r_type); |
| 2097 | return FALSE; |
| 2098 | } |
| 2099 | return TRUE; |
| 2100 | } |
| 2101 | |
| 2102 | static reloc_howto_type * |
| 2103 | elfNN_aarch64_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 2104 | bfd_reloc_code_real_type code) |
| 2105 | { |
| 2106 | reloc_howto_type *howto = elfNN_aarch64_howto_from_bfd_reloc (code); |
| 2107 | |
| 2108 | if (howto != NULL) |
| 2109 | return howto; |
| 2110 | |
| 2111 | bfd_set_error (bfd_error_bad_value); |
| 2112 | return NULL; |
| 2113 | } |
| 2114 | |
| 2115 | static reloc_howto_type * |
| 2116 | elfNN_aarch64_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 2117 | const char *r_name) |
| 2118 | { |
| 2119 | unsigned int i; |
| 2120 | |
| 2121 | for (i = 1; i < ARRAY_SIZE (elfNN_aarch64_howto_table) - 1; ++i) |
| 2122 | if (elfNN_aarch64_howto_table[i].name != NULL |
| 2123 | && strcasecmp (elfNN_aarch64_howto_table[i].name, r_name) == 0) |
| 2124 | return &elfNN_aarch64_howto_table[i]; |
| 2125 | |
| 2126 | return NULL; |
| 2127 | } |
| 2128 | |
| 2129 | #define TARGET_LITTLE_SYM aarch64_elfNN_le_vec |
| 2130 | #define TARGET_LITTLE_NAME "elfNN-littleaarch64" |
| 2131 | #define TARGET_BIG_SYM aarch64_elfNN_be_vec |
| 2132 | #define TARGET_BIG_NAME "elfNN-bigaarch64" |
| 2133 | |
| 2134 | /* The linker script knows the section names for placement. |
| 2135 | The entry_names are used to do simple name mangling on the stubs. |
| 2136 | Given a function name, and its type, the stub can be found. The |
| 2137 | name can be changed. The only requirement is the %s be present. */ |
| 2138 | #define STUB_ENTRY_NAME "__%s_veneer" |
| 2139 | |
| 2140 | /* The name of the dynamic interpreter. This is put in the .interp |
| 2141 | section. */ |
| 2142 | #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1" |
| 2143 | |
| 2144 | #define AARCH64_MAX_FWD_BRANCH_OFFSET \ |
| 2145 | (((1 << 25) - 1) << 2) |
| 2146 | #define AARCH64_MAX_BWD_BRANCH_OFFSET \ |
| 2147 | (-((1 << 25) << 2)) |
| 2148 | |
| 2149 | #define AARCH64_MAX_ADRP_IMM ((1 << 20) - 1) |
| 2150 | #define AARCH64_MIN_ADRP_IMM (-(1 << 20)) |
| 2151 | |
| 2152 | static int |
| 2153 | aarch64_valid_for_adrp_p (bfd_vma value, bfd_vma place) |
| 2154 | { |
| 2155 | bfd_signed_vma offset = (bfd_signed_vma) (PG (value) - PG (place)) >> 12; |
| 2156 | return offset <= AARCH64_MAX_ADRP_IMM && offset >= AARCH64_MIN_ADRP_IMM; |
| 2157 | } |
| 2158 | |
| 2159 | static int |
| 2160 | aarch64_valid_branch_p (bfd_vma value, bfd_vma place) |
| 2161 | { |
| 2162 | bfd_signed_vma offset = (bfd_signed_vma) (value - place); |
| 2163 | return (offset <= AARCH64_MAX_FWD_BRANCH_OFFSET |
| 2164 | && offset >= AARCH64_MAX_BWD_BRANCH_OFFSET); |
| 2165 | } |
| 2166 | |
| 2167 | static const uint32_t aarch64_adrp_branch_stub [] = |
| 2168 | { |
| 2169 | 0x90000010, /* adrp ip0, X */ |
| 2170 | /* R_AARCH64_ADR_HI21_PCREL(X) */ |
| 2171 | 0x91000210, /* add ip0, ip0, :lo12:X */ |
| 2172 | /* R_AARCH64_ADD_ABS_LO12_NC(X) */ |
| 2173 | 0xd61f0200, /* br ip0 */ |
| 2174 | }; |
| 2175 | |
| 2176 | static const uint32_t aarch64_long_branch_stub[] = |
| 2177 | { |
| 2178 | #if ARCH_SIZE == 64 |
| 2179 | 0x58000090, /* ldr ip0, 1f */ |
| 2180 | #else |
| 2181 | 0x18000090, /* ldr wip0, 1f */ |
| 2182 | #endif |
| 2183 | 0x10000011, /* adr ip1, #0 */ |
| 2184 | 0x8b110210, /* add ip0, ip0, ip1 */ |
| 2185 | 0xd61f0200, /* br ip0 */ |
| 2186 | 0x00000000, /* 1: .xword or .word |
| 2187 | R_AARCH64_PRELNN(X) + 12 |
| 2188 | */ |
| 2189 | 0x00000000, |
| 2190 | }; |
| 2191 | |
| 2192 | static const uint32_t aarch64_erratum_835769_stub[] = |
| 2193 | { |
| 2194 | 0x00000000, /* Placeholder for multiply accumulate. */ |
| 2195 | 0x14000000, /* b <label> */ |
| 2196 | }; |
| 2197 | |
| 2198 | static const uint32_t aarch64_erratum_843419_stub[] = |
| 2199 | { |
| 2200 | 0x00000000, /* Placeholder for LDR instruction. */ |
| 2201 | 0x14000000, /* b <label> */ |
| 2202 | }; |
| 2203 | |
| 2204 | /* Section name for stubs is the associated section name plus this |
| 2205 | string. */ |
| 2206 | #define STUB_SUFFIX ".stub" |
| 2207 | |
| 2208 | enum elf_aarch64_stub_type |
| 2209 | { |
| 2210 | aarch64_stub_none, |
| 2211 | aarch64_stub_adrp_branch, |
| 2212 | aarch64_stub_long_branch, |
| 2213 | aarch64_stub_erratum_835769_veneer, |
| 2214 | aarch64_stub_erratum_843419_veneer, |
| 2215 | }; |
| 2216 | |
| 2217 | struct elf_aarch64_stub_hash_entry |
| 2218 | { |
| 2219 | /* Base hash table entry structure. */ |
| 2220 | struct bfd_hash_entry root; |
| 2221 | |
| 2222 | /* The stub section. */ |
| 2223 | asection *stub_sec; |
| 2224 | |
| 2225 | /* Offset within stub_sec of the beginning of this stub. */ |
| 2226 | bfd_vma stub_offset; |
| 2227 | |
| 2228 | /* Given the symbol's value and its section we can determine its final |
| 2229 | value when building the stubs (so the stub knows where to jump). */ |
| 2230 | bfd_vma target_value; |
| 2231 | asection *target_section; |
| 2232 | |
| 2233 | enum elf_aarch64_stub_type stub_type; |
| 2234 | |
| 2235 | /* The symbol table entry, if any, that this was derived from. */ |
| 2236 | struct elf_aarch64_link_hash_entry *h; |
| 2237 | |
| 2238 | /* Destination symbol type */ |
| 2239 | unsigned char st_type; |
| 2240 | |
| 2241 | /* Where this stub is being called from, or, in the case of combined |
| 2242 | stub sections, the first input section in the group. */ |
| 2243 | asection *id_sec; |
| 2244 | |
| 2245 | /* The name for the local symbol at the start of this stub. The |
| 2246 | stub name in the hash table has to be unique; this does not, so |
| 2247 | it can be friendlier. */ |
| 2248 | char *output_name; |
| 2249 | |
| 2250 | /* The instruction which caused this stub to be generated (only valid for |
| 2251 | erratum 835769 workaround stubs at present). */ |
| 2252 | uint32_t veneered_insn; |
| 2253 | |
| 2254 | /* In an erratum 843419 workaround stub, the ADRP instruction offset. */ |
| 2255 | bfd_vma adrp_offset; |
| 2256 | }; |
| 2257 | |
| 2258 | /* Used to build a map of a section. This is required for mixed-endian |
| 2259 | code/data. */ |
| 2260 | |
| 2261 | typedef struct elf_elf_section_map |
| 2262 | { |
| 2263 | bfd_vma vma; |
| 2264 | char type; |
| 2265 | } |
| 2266 | elf_aarch64_section_map; |
| 2267 | |
| 2268 | |
| 2269 | typedef struct _aarch64_elf_section_data |
| 2270 | { |
| 2271 | struct bfd_elf_section_data elf; |
| 2272 | unsigned int mapcount; |
| 2273 | unsigned int mapsize; |
| 2274 | elf_aarch64_section_map *map; |
| 2275 | } |
| 2276 | _aarch64_elf_section_data; |
| 2277 | |
| 2278 | #define elf_aarch64_section_data(sec) \ |
| 2279 | ((_aarch64_elf_section_data *) elf_section_data (sec)) |
| 2280 | |
| 2281 | /* The size of the thread control block which is defined to be two pointers. */ |
| 2282 | #define TCB_SIZE (ARCH_SIZE/8)*2 |
| 2283 | |
| 2284 | struct elf_aarch64_local_symbol |
| 2285 | { |
| 2286 | unsigned int got_type; |
| 2287 | bfd_signed_vma got_refcount; |
| 2288 | bfd_vma got_offset; |
| 2289 | |
| 2290 | /* Offset of the GOTPLT entry reserved for the TLS descriptor. The |
| 2291 | offset is from the end of the jump table and reserved entries |
| 2292 | within the PLTGOT. |
| 2293 | |
| 2294 | The magic value (bfd_vma) -1 indicates that an offset has not be |
| 2295 | allocated. */ |
| 2296 | bfd_vma tlsdesc_got_jump_table_offset; |
| 2297 | }; |
| 2298 | |
| 2299 | struct elf_aarch64_obj_tdata |
| 2300 | { |
| 2301 | struct elf_obj_tdata root; |
| 2302 | |
| 2303 | /* local symbol descriptors */ |
| 2304 | struct elf_aarch64_local_symbol *locals; |
| 2305 | |
| 2306 | /* Zero to warn when linking objects with incompatible enum sizes. */ |
| 2307 | int no_enum_size_warning; |
| 2308 | |
| 2309 | /* Zero to warn when linking objects with incompatible wchar_t sizes. */ |
| 2310 | int no_wchar_size_warning; |
| 2311 | }; |
| 2312 | |
| 2313 | #define elf_aarch64_tdata(bfd) \ |
| 2314 | ((struct elf_aarch64_obj_tdata *) (bfd)->tdata.any) |
| 2315 | |
| 2316 | #define elf_aarch64_locals(bfd) (elf_aarch64_tdata (bfd)->locals) |
| 2317 | |
| 2318 | #define is_aarch64_elf(bfd) \ |
| 2319 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ |
| 2320 | && elf_tdata (bfd) != NULL \ |
| 2321 | && elf_object_id (bfd) == AARCH64_ELF_DATA) |
| 2322 | |
| 2323 | static bfd_boolean |
| 2324 | elfNN_aarch64_mkobject (bfd *abfd) |
| 2325 | { |
| 2326 | return bfd_elf_allocate_object (abfd, sizeof (struct elf_aarch64_obj_tdata), |
| 2327 | AARCH64_ELF_DATA); |
| 2328 | } |
| 2329 | |
| 2330 | #define elf_aarch64_hash_entry(ent) \ |
| 2331 | ((struct elf_aarch64_link_hash_entry *)(ent)) |
| 2332 | |
| 2333 | #define GOT_UNKNOWN 0 |
| 2334 | #define GOT_NORMAL 1 |
| 2335 | #define GOT_TLS_GD 2 |
| 2336 | #define GOT_TLS_IE 4 |
| 2337 | #define GOT_TLSDESC_GD 8 |
| 2338 | |
| 2339 | #define GOT_TLS_GD_ANY_P(type) ((type & GOT_TLS_GD) || (type & GOT_TLSDESC_GD)) |
| 2340 | |
| 2341 | /* AArch64 ELF linker hash entry. */ |
| 2342 | struct elf_aarch64_link_hash_entry |
| 2343 | { |
| 2344 | struct elf_link_hash_entry root; |
| 2345 | |
| 2346 | /* Track dynamic relocs copied for this symbol. */ |
| 2347 | struct elf_dyn_relocs *dyn_relocs; |
| 2348 | |
| 2349 | /* Since PLT entries have variable size, we need to record the |
| 2350 | index into .got.plt instead of recomputing it from the PLT |
| 2351 | offset. */ |
| 2352 | bfd_signed_vma plt_got_offset; |
| 2353 | |
| 2354 | /* Bit mask representing the type of GOT entry(s) if any required by |
| 2355 | this symbol. */ |
| 2356 | unsigned int got_type; |
| 2357 | |
| 2358 | /* A pointer to the most recently used stub hash entry against this |
| 2359 | symbol. */ |
| 2360 | struct elf_aarch64_stub_hash_entry *stub_cache; |
| 2361 | |
| 2362 | /* Offset of the GOTPLT entry reserved for the TLS descriptor. The offset |
| 2363 | is from the end of the jump table and reserved entries within the PLTGOT. |
| 2364 | |
| 2365 | The magic value (bfd_vma) -1 indicates that an offset has not |
| 2366 | be allocated. */ |
| 2367 | bfd_vma tlsdesc_got_jump_table_offset; |
| 2368 | }; |
| 2369 | |
| 2370 | static unsigned int |
| 2371 | elfNN_aarch64_symbol_got_type (struct elf_link_hash_entry *h, |
| 2372 | bfd *abfd, |
| 2373 | unsigned long r_symndx) |
| 2374 | { |
| 2375 | if (h) |
| 2376 | return elf_aarch64_hash_entry (h)->got_type; |
| 2377 | |
| 2378 | if (! elf_aarch64_locals (abfd)) |
| 2379 | return GOT_UNKNOWN; |
| 2380 | |
| 2381 | return elf_aarch64_locals (abfd)[r_symndx].got_type; |
| 2382 | } |
| 2383 | |
| 2384 | /* Get the AArch64 elf linker hash table from a link_info structure. */ |
| 2385 | #define elf_aarch64_hash_table(info) \ |
| 2386 | ((struct elf_aarch64_link_hash_table *) ((info)->hash)) |
| 2387 | |
| 2388 | #define aarch64_stub_hash_lookup(table, string, create, copy) \ |
| 2389 | ((struct elf_aarch64_stub_hash_entry *) \ |
| 2390 | bfd_hash_lookup ((table), (string), (create), (copy))) |
| 2391 | |
| 2392 | /* AArch64 ELF linker hash table. */ |
| 2393 | struct elf_aarch64_link_hash_table |
| 2394 | { |
| 2395 | /* The main hash table. */ |
| 2396 | struct elf_link_hash_table root; |
| 2397 | |
| 2398 | /* Nonzero to force PIC branch veneers. */ |
| 2399 | int pic_veneer; |
| 2400 | |
| 2401 | /* Fix erratum 835769. */ |
| 2402 | int fix_erratum_835769; |
| 2403 | |
| 2404 | /* Fix erratum 843419. */ |
| 2405 | int fix_erratum_843419; |
| 2406 | |
| 2407 | /* Enable ADRP->ADR rewrite for erratum 843419 workaround. */ |
| 2408 | int fix_erratum_843419_adr; |
| 2409 | |
| 2410 | /* Don't apply link-time values for dynamic relocations. */ |
| 2411 | int no_apply_dynamic_relocs; |
| 2412 | |
| 2413 | /* The number of bytes in the initial entry in the PLT. */ |
| 2414 | bfd_size_type plt_header_size; |
| 2415 | |
| 2416 | /* The number of bytes in the subsequent PLT etries. */ |
| 2417 | bfd_size_type plt_entry_size; |
| 2418 | |
| 2419 | /* Small local sym cache. */ |
| 2420 | struct sym_cache sym_cache; |
| 2421 | |
| 2422 | /* For convenience in allocate_dynrelocs. */ |
| 2423 | bfd *obfd; |
| 2424 | |
| 2425 | /* The amount of space used by the reserved portion of the sgotplt |
| 2426 | section, plus whatever space is used by the jump slots. */ |
| 2427 | bfd_vma sgotplt_jump_table_size; |
| 2428 | |
| 2429 | /* The stub hash table. */ |
| 2430 | struct bfd_hash_table stub_hash_table; |
| 2431 | |
| 2432 | /* Linker stub bfd. */ |
| 2433 | bfd *stub_bfd; |
| 2434 | |
| 2435 | /* Linker call-backs. */ |
| 2436 | asection *(*add_stub_section) (const char *, asection *); |
| 2437 | void (*layout_sections_again) (void); |
| 2438 | |
| 2439 | /* Array to keep track of which stub sections have been created, and |
| 2440 | information on stub grouping. */ |
| 2441 | struct map_stub |
| 2442 | { |
| 2443 | /* This is the section to which stubs in the group will be |
| 2444 | attached. */ |
| 2445 | asection *link_sec; |
| 2446 | /* The stub section. */ |
| 2447 | asection *stub_sec; |
| 2448 | } *stub_group; |
| 2449 | |
| 2450 | /* Assorted information used by elfNN_aarch64_size_stubs. */ |
| 2451 | unsigned int bfd_count; |
| 2452 | unsigned int top_index; |
| 2453 | asection **input_list; |
| 2454 | |
| 2455 | /* The offset into splt of the PLT entry for the TLS descriptor |
| 2456 | resolver. Special values are 0, if not necessary (or not found |
| 2457 | to be necessary yet), and -1 if needed but not determined |
| 2458 | yet. */ |
| 2459 | bfd_vma tlsdesc_plt; |
| 2460 | |
| 2461 | /* The GOT offset for the lazy trampoline. Communicated to the |
| 2462 | loader via DT_TLSDESC_GOT. The magic value (bfd_vma) -1 |
| 2463 | indicates an offset is not allocated. */ |
| 2464 | bfd_vma dt_tlsdesc_got; |
| 2465 | |
| 2466 | /* Used by local STT_GNU_IFUNC symbols. */ |
| 2467 | htab_t loc_hash_table; |
| 2468 | void * loc_hash_memory; |
| 2469 | }; |
| 2470 | |
| 2471 | /* Create an entry in an AArch64 ELF linker hash table. */ |
| 2472 | |
| 2473 | static struct bfd_hash_entry * |
| 2474 | elfNN_aarch64_link_hash_newfunc (struct bfd_hash_entry *entry, |
| 2475 | struct bfd_hash_table *table, |
| 2476 | const char *string) |
| 2477 | { |
| 2478 | struct elf_aarch64_link_hash_entry *ret = |
| 2479 | (struct elf_aarch64_link_hash_entry *) entry; |
| 2480 | |
| 2481 | /* Allocate the structure if it has not already been allocated by a |
| 2482 | subclass. */ |
| 2483 | if (ret == NULL) |
| 2484 | ret = bfd_hash_allocate (table, |
| 2485 | sizeof (struct elf_aarch64_link_hash_entry)); |
| 2486 | if (ret == NULL) |
| 2487 | return (struct bfd_hash_entry *) ret; |
| 2488 | |
| 2489 | /* Call the allocation method of the superclass. */ |
| 2490 | ret = ((struct elf_aarch64_link_hash_entry *) |
| 2491 | _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, |
| 2492 | table, string)); |
| 2493 | if (ret != NULL) |
| 2494 | { |
| 2495 | ret->dyn_relocs = NULL; |
| 2496 | ret->got_type = GOT_UNKNOWN; |
| 2497 | ret->plt_got_offset = (bfd_vma) - 1; |
| 2498 | ret->stub_cache = NULL; |
| 2499 | ret->tlsdesc_got_jump_table_offset = (bfd_vma) - 1; |
| 2500 | } |
| 2501 | |
| 2502 | return (struct bfd_hash_entry *) ret; |
| 2503 | } |
| 2504 | |
| 2505 | /* Initialize an entry in the stub hash table. */ |
| 2506 | |
| 2507 | static struct bfd_hash_entry * |
| 2508 | stub_hash_newfunc (struct bfd_hash_entry *entry, |
| 2509 | struct bfd_hash_table *table, const char *string) |
| 2510 | { |
| 2511 | /* Allocate the structure if it has not already been allocated by a |
| 2512 | subclass. */ |
| 2513 | if (entry == NULL) |
| 2514 | { |
| 2515 | entry = bfd_hash_allocate (table, |
| 2516 | sizeof (struct |
| 2517 | elf_aarch64_stub_hash_entry)); |
| 2518 | if (entry == NULL) |
| 2519 | return entry; |
| 2520 | } |
| 2521 | |
| 2522 | /* Call the allocation method of the superclass. */ |
| 2523 | entry = bfd_hash_newfunc (entry, table, string); |
| 2524 | if (entry != NULL) |
| 2525 | { |
| 2526 | struct elf_aarch64_stub_hash_entry *eh; |
| 2527 | |
| 2528 | /* Initialize the local fields. */ |
| 2529 | eh = (struct elf_aarch64_stub_hash_entry *) entry; |
| 2530 | eh->adrp_offset = 0; |
| 2531 | eh->stub_sec = NULL; |
| 2532 | eh->stub_offset = 0; |
| 2533 | eh->target_value = 0; |
| 2534 | eh->target_section = NULL; |
| 2535 | eh->stub_type = aarch64_stub_none; |
| 2536 | eh->h = NULL; |
| 2537 | eh->id_sec = NULL; |
| 2538 | } |
| 2539 | |
| 2540 | return entry; |
| 2541 | } |
| 2542 | |
| 2543 | /* Compute a hash of a local hash entry. We use elf_link_hash_entry |
| 2544 | for local symbol so that we can handle local STT_GNU_IFUNC symbols |
| 2545 | as global symbol. We reuse indx and dynstr_index for local symbol |
| 2546 | hash since they aren't used by global symbols in this backend. */ |
| 2547 | |
| 2548 | static hashval_t |
| 2549 | elfNN_aarch64_local_htab_hash (const void *ptr) |
| 2550 | { |
| 2551 | struct elf_link_hash_entry *h |
| 2552 | = (struct elf_link_hash_entry *) ptr; |
| 2553 | return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index); |
| 2554 | } |
| 2555 | |
| 2556 | /* Compare local hash entries. */ |
| 2557 | |
| 2558 | static int |
| 2559 | elfNN_aarch64_local_htab_eq (const void *ptr1, const void *ptr2) |
| 2560 | { |
| 2561 | struct elf_link_hash_entry *h1 |
| 2562 | = (struct elf_link_hash_entry *) ptr1; |
| 2563 | struct elf_link_hash_entry *h2 |
| 2564 | = (struct elf_link_hash_entry *) ptr2; |
| 2565 | |
| 2566 | return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index; |
| 2567 | } |
| 2568 | |
| 2569 | /* Find and/or create a hash entry for local symbol. */ |
| 2570 | |
| 2571 | static struct elf_link_hash_entry * |
| 2572 | elfNN_aarch64_get_local_sym_hash (struct elf_aarch64_link_hash_table *htab, |
| 2573 | bfd *abfd, const Elf_Internal_Rela *rel, |
| 2574 | bfd_boolean create) |
| 2575 | { |
| 2576 | struct elf_aarch64_link_hash_entry e, *ret; |
| 2577 | asection *sec = abfd->sections; |
| 2578 | hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id, |
| 2579 | ELFNN_R_SYM (rel->r_info)); |
| 2580 | void **slot; |
| 2581 | |
| 2582 | e.root.indx = sec->id; |
| 2583 | e.root.dynstr_index = ELFNN_R_SYM (rel->r_info); |
| 2584 | slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h, |
| 2585 | create ? INSERT : NO_INSERT); |
| 2586 | |
| 2587 | if (!slot) |
| 2588 | return NULL; |
| 2589 | |
| 2590 | if (*slot) |
| 2591 | { |
| 2592 | ret = (struct elf_aarch64_link_hash_entry *) *slot; |
| 2593 | return &ret->root; |
| 2594 | } |
| 2595 | |
| 2596 | ret = (struct elf_aarch64_link_hash_entry *) |
| 2597 | objalloc_alloc ((struct objalloc *) htab->loc_hash_memory, |
| 2598 | sizeof (struct elf_aarch64_link_hash_entry)); |
| 2599 | if (ret) |
| 2600 | { |
| 2601 | memset (ret, 0, sizeof (*ret)); |
| 2602 | ret->root.indx = sec->id; |
| 2603 | ret->root.dynstr_index = ELFNN_R_SYM (rel->r_info); |
| 2604 | ret->root.dynindx = -1; |
| 2605 | *slot = ret; |
| 2606 | } |
| 2607 | return &ret->root; |
| 2608 | } |
| 2609 | |
| 2610 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
| 2611 | |
| 2612 | static void |
| 2613 | elfNN_aarch64_copy_indirect_symbol (struct bfd_link_info *info, |
| 2614 | struct elf_link_hash_entry *dir, |
| 2615 | struct elf_link_hash_entry *ind) |
| 2616 | { |
| 2617 | struct elf_aarch64_link_hash_entry *edir, *eind; |
| 2618 | |
| 2619 | edir = (struct elf_aarch64_link_hash_entry *) dir; |
| 2620 | eind = (struct elf_aarch64_link_hash_entry *) ind; |
| 2621 | |
| 2622 | if (eind->dyn_relocs != NULL) |
| 2623 | { |
| 2624 | if (edir->dyn_relocs != NULL) |
| 2625 | { |
| 2626 | struct elf_dyn_relocs **pp; |
| 2627 | struct elf_dyn_relocs *p; |
| 2628 | |
| 2629 | /* Add reloc counts against the indirect sym to the direct sym |
| 2630 | list. Merge any entries against the same section. */ |
| 2631 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL;) |
| 2632 | { |
| 2633 | struct elf_dyn_relocs *q; |
| 2634 | |
| 2635 | for (q = edir->dyn_relocs; q != NULL; q = q->next) |
| 2636 | if (q->sec == p->sec) |
| 2637 | { |
| 2638 | q->pc_count += p->pc_count; |
| 2639 | q->count += p->count; |
| 2640 | *pp = p->next; |
| 2641 | break; |
| 2642 | } |
| 2643 | if (q == NULL) |
| 2644 | pp = &p->next; |
| 2645 | } |
| 2646 | *pp = edir->dyn_relocs; |
| 2647 | } |
| 2648 | |
| 2649 | edir->dyn_relocs = eind->dyn_relocs; |
| 2650 | eind->dyn_relocs = NULL; |
| 2651 | } |
| 2652 | |
| 2653 | if (ind->root.type == bfd_link_hash_indirect) |
| 2654 | { |
| 2655 | /* Copy over PLT info. */ |
| 2656 | if (dir->got.refcount <= 0) |
| 2657 | { |
| 2658 | edir->got_type = eind->got_type; |
| 2659 | eind->got_type = GOT_UNKNOWN; |
| 2660 | } |
| 2661 | } |
| 2662 | |
| 2663 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); |
| 2664 | } |
| 2665 | |
| 2666 | /* Destroy an AArch64 elf linker hash table. */ |
| 2667 | |
| 2668 | static void |
| 2669 | elfNN_aarch64_link_hash_table_free (bfd *obfd) |
| 2670 | { |
| 2671 | struct elf_aarch64_link_hash_table *ret |
| 2672 | = (struct elf_aarch64_link_hash_table *) obfd->link.hash; |
| 2673 | |
| 2674 | if (ret->loc_hash_table) |
| 2675 | htab_delete (ret->loc_hash_table); |
| 2676 | if (ret->loc_hash_memory) |
| 2677 | objalloc_free ((struct objalloc *) ret->loc_hash_memory); |
| 2678 | |
| 2679 | bfd_hash_table_free (&ret->stub_hash_table); |
| 2680 | _bfd_elf_link_hash_table_free (obfd); |
| 2681 | } |
| 2682 | |
| 2683 | /* Create an AArch64 elf linker hash table. */ |
| 2684 | |
| 2685 | static struct bfd_link_hash_table * |
| 2686 | elfNN_aarch64_link_hash_table_create (bfd *abfd) |
| 2687 | { |
| 2688 | struct elf_aarch64_link_hash_table *ret; |
| 2689 | bfd_size_type amt = sizeof (struct elf_aarch64_link_hash_table); |
| 2690 | |
| 2691 | ret = bfd_zmalloc (amt); |
| 2692 | if (ret == NULL) |
| 2693 | return NULL; |
| 2694 | |
| 2695 | if (!_bfd_elf_link_hash_table_init |
| 2696 | (&ret->root, abfd, elfNN_aarch64_link_hash_newfunc, |
| 2697 | sizeof (struct elf_aarch64_link_hash_entry), AARCH64_ELF_DATA)) |
| 2698 | { |
| 2699 | free (ret); |
| 2700 | return NULL; |
| 2701 | } |
| 2702 | |
| 2703 | ret->plt_header_size = PLT_ENTRY_SIZE; |
| 2704 | ret->plt_entry_size = PLT_SMALL_ENTRY_SIZE; |
| 2705 | ret->obfd = abfd; |
| 2706 | ret->dt_tlsdesc_got = (bfd_vma) - 1; |
| 2707 | |
| 2708 | if (!bfd_hash_table_init (&ret->stub_hash_table, stub_hash_newfunc, |
| 2709 | sizeof (struct elf_aarch64_stub_hash_entry))) |
| 2710 | { |
| 2711 | _bfd_elf_link_hash_table_free (abfd); |
| 2712 | return NULL; |
| 2713 | } |
| 2714 | |
| 2715 | ret->loc_hash_table = htab_try_create (1024, |
| 2716 | elfNN_aarch64_local_htab_hash, |
| 2717 | elfNN_aarch64_local_htab_eq, |
| 2718 | NULL); |
| 2719 | ret->loc_hash_memory = objalloc_create (); |
| 2720 | if (!ret->loc_hash_table || !ret->loc_hash_memory) |
| 2721 | { |
| 2722 | elfNN_aarch64_link_hash_table_free (abfd); |
| 2723 | return NULL; |
| 2724 | } |
| 2725 | ret->root.root.hash_table_free = elfNN_aarch64_link_hash_table_free; |
| 2726 | |
| 2727 | return &ret->root.root; |
| 2728 | } |
| 2729 | |
| 2730 | /* Perform relocation R_TYPE. Returns TRUE upon success, FALSE otherwise. */ |
| 2731 | |
| 2732 | static bfd_boolean |
| 2733 | aarch64_relocate (unsigned int r_type, bfd *input_bfd, asection *input_section, |
| 2734 | bfd_vma offset, bfd_vma value) |
| 2735 | { |
| 2736 | reloc_howto_type *howto; |
| 2737 | bfd_vma place; |
| 2738 | |
| 2739 | howto = elfNN_aarch64_howto_from_type (input_bfd, r_type); |
| 2740 | place = (input_section->output_section->vma + input_section->output_offset |
| 2741 | + offset); |
| 2742 | |
| 2743 | r_type = elfNN_aarch64_bfd_reloc_from_type (input_bfd, r_type); |
| 2744 | value = _bfd_aarch64_elf_resolve_relocation (r_type, place, value, 0, FALSE); |
| 2745 | return _bfd_aarch64_elf_put_addend (input_bfd, |
| 2746 | input_section->contents + offset, r_type, |
| 2747 | howto, value) == bfd_reloc_ok; |
| 2748 | } |
| 2749 | |
| 2750 | static enum elf_aarch64_stub_type |
| 2751 | aarch64_select_branch_stub (bfd_vma value, bfd_vma place) |
| 2752 | { |
| 2753 | if (aarch64_valid_for_adrp_p (value, place)) |
| 2754 | return aarch64_stub_adrp_branch; |
| 2755 | return aarch64_stub_long_branch; |
| 2756 | } |
| 2757 | |
| 2758 | /* Determine the type of stub needed, if any, for a call. */ |
| 2759 | |
| 2760 | static enum elf_aarch64_stub_type |
| 2761 | aarch64_type_of_stub (asection *input_sec, |
| 2762 | const Elf_Internal_Rela *rel, |
| 2763 | asection *sym_sec, |
| 2764 | unsigned char st_type, |
| 2765 | bfd_vma destination) |
| 2766 | { |
| 2767 | bfd_vma location; |
| 2768 | bfd_signed_vma branch_offset; |
| 2769 | unsigned int r_type; |
| 2770 | enum elf_aarch64_stub_type stub_type = aarch64_stub_none; |
| 2771 | |
| 2772 | if (st_type != STT_FUNC |
| 2773 | && (sym_sec == input_sec)) |
| 2774 | return stub_type; |
| 2775 | |
| 2776 | /* Determine where the call point is. */ |
| 2777 | location = (input_sec->output_offset |
| 2778 | + input_sec->output_section->vma + rel->r_offset); |
| 2779 | |
| 2780 | branch_offset = (bfd_signed_vma) (destination - location); |
| 2781 | |
| 2782 | r_type = ELFNN_R_TYPE (rel->r_info); |
| 2783 | |
| 2784 | /* We don't want to redirect any old unconditional jump in this way, |
| 2785 | only one which is being used for a sibcall, where it is |
| 2786 | acceptable for the IP0 and IP1 registers to be clobbered. */ |
| 2787 | if ((r_type == AARCH64_R (CALL26) || r_type == AARCH64_R (JUMP26)) |
| 2788 | && (branch_offset > AARCH64_MAX_FWD_BRANCH_OFFSET |
| 2789 | || branch_offset < AARCH64_MAX_BWD_BRANCH_OFFSET)) |
| 2790 | { |
| 2791 | stub_type = aarch64_stub_long_branch; |
| 2792 | } |
| 2793 | |
| 2794 | return stub_type; |
| 2795 | } |
| 2796 | |
| 2797 | /* Build a name for an entry in the stub hash table. */ |
| 2798 | |
| 2799 | static char * |
| 2800 | elfNN_aarch64_stub_name (const asection *input_section, |
| 2801 | const asection *sym_sec, |
| 2802 | const struct elf_aarch64_link_hash_entry *hash, |
| 2803 | const Elf_Internal_Rela *rel) |
| 2804 | { |
| 2805 | char *stub_name; |
| 2806 | bfd_size_type len; |
| 2807 | |
| 2808 | if (hash) |
| 2809 | { |
| 2810 | len = 8 + 1 + strlen (hash->root.root.root.string) + 1 + 16 + 1; |
| 2811 | stub_name = bfd_malloc (len); |
| 2812 | if (stub_name != NULL) |
| 2813 | snprintf (stub_name, len, "%08x_%s+%" BFD_VMA_FMT "x", |
| 2814 | (unsigned int) input_section->id, |
| 2815 | hash->root.root.root.string, |
| 2816 | rel->r_addend); |
| 2817 | } |
| 2818 | else |
| 2819 | { |
| 2820 | len = 8 + 1 + 8 + 1 + 8 + 1 + 16 + 1; |
| 2821 | stub_name = bfd_malloc (len); |
| 2822 | if (stub_name != NULL) |
| 2823 | snprintf (stub_name, len, "%08x_%x:%x+%" BFD_VMA_FMT "x", |
| 2824 | (unsigned int) input_section->id, |
| 2825 | (unsigned int) sym_sec->id, |
| 2826 | (unsigned int) ELFNN_R_SYM (rel->r_info), |
| 2827 | rel->r_addend); |
| 2828 | } |
| 2829 | |
| 2830 | return stub_name; |
| 2831 | } |
| 2832 | |
| 2833 | /* Return TRUE if symbol H should be hashed in the `.gnu.hash' section. For |
| 2834 | executable PLT slots where the executable never takes the address of those |
| 2835 | functions, the function symbols are not added to the hash table. */ |
| 2836 | |
| 2837 | static bfd_boolean |
| 2838 | elf_aarch64_hash_symbol (struct elf_link_hash_entry *h) |
| 2839 | { |
| 2840 | if (h->plt.offset != (bfd_vma) -1 |
| 2841 | && !h->def_regular |
| 2842 | && !h->pointer_equality_needed) |
| 2843 | return FALSE; |
| 2844 | |
| 2845 | return _bfd_elf_hash_symbol (h); |
| 2846 | } |
| 2847 | |
| 2848 | |
| 2849 | /* Look up an entry in the stub hash. Stub entries are cached because |
| 2850 | creating the stub name takes a bit of time. */ |
| 2851 | |
| 2852 | static struct elf_aarch64_stub_hash_entry * |
| 2853 | elfNN_aarch64_get_stub_entry (const asection *input_section, |
| 2854 | const asection *sym_sec, |
| 2855 | struct elf_link_hash_entry *hash, |
| 2856 | const Elf_Internal_Rela *rel, |
| 2857 | struct elf_aarch64_link_hash_table *htab) |
| 2858 | { |
| 2859 | struct elf_aarch64_stub_hash_entry *stub_entry; |
| 2860 | struct elf_aarch64_link_hash_entry *h = |
| 2861 | (struct elf_aarch64_link_hash_entry *) hash; |
| 2862 | const asection *id_sec; |
| 2863 | |
| 2864 | if ((input_section->flags & SEC_CODE) == 0) |
| 2865 | return NULL; |
| 2866 | |
| 2867 | /* If this input section is part of a group of sections sharing one |
| 2868 | stub section, then use the id of the first section in the group. |
| 2869 | Stub names need to include a section id, as there may well be |
| 2870 | more than one stub used to reach say, printf, and we need to |
| 2871 | distinguish between them. */ |
| 2872 | id_sec = htab->stub_group[input_section->id].link_sec; |
| 2873 | |
| 2874 | if (h != NULL && h->stub_cache != NULL |
| 2875 | && h->stub_cache->h == h && h->stub_cache->id_sec == id_sec) |
| 2876 | { |
| 2877 | stub_entry = h->stub_cache; |
| 2878 | } |
| 2879 | else |
| 2880 | { |
| 2881 | char *stub_name; |
| 2882 | |
| 2883 | stub_name = elfNN_aarch64_stub_name (id_sec, sym_sec, h, rel); |
| 2884 | if (stub_name == NULL) |
| 2885 | return NULL; |
| 2886 | |
| 2887 | stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table, |
| 2888 | stub_name, FALSE, FALSE); |
| 2889 | if (h != NULL) |
| 2890 | h->stub_cache = stub_entry; |
| 2891 | |
| 2892 | free (stub_name); |
| 2893 | } |
| 2894 | |
| 2895 | return stub_entry; |
| 2896 | } |
| 2897 | |
| 2898 | |
| 2899 | /* Create a stub section. */ |
| 2900 | |
| 2901 | static asection * |
| 2902 | _bfd_aarch64_create_stub_section (asection *section, |
| 2903 | struct elf_aarch64_link_hash_table *htab) |
| 2904 | { |
| 2905 | size_t namelen; |
| 2906 | bfd_size_type len; |
| 2907 | char *s_name; |
| 2908 | |
| 2909 | namelen = strlen (section->name); |
| 2910 | len = namelen + sizeof (STUB_SUFFIX); |
| 2911 | s_name = bfd_alloc (htab->stub_bfd, len); |
| 2912 | if (s_name == NULL) |
| 2913 | return NULL; |
| 2914 | |
| 2915 | memcpy (s_name, section->name, namelen); |
| 2916 | memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX)); |
| 2917 | return (*htab->add_stub_section) (s_name, section); |
| 2918 | } |
| 2919 | |
| 2920 | |
| 2921 | /* Find or create a stub section for a link section. |
| 2922 | |
| 2923 | Fix or create the stub section used to collect stubs attached to |
| 2924 | the specified link section. */ |
| 2925 | |
| 2926 | static asection * |
| 2927 | _bfd_aarch64_get_stub_for_link_section (asection *link_section, |
| 2928 | struct elf_aarch64_link_hash_table *htab) |
| 2929 | { |
| 2930 | if (htab->stub_group[link_section->id].stub_sec == NULL) |
| 2931 | htab->stub_group[link_section->id].stub_sec |
| 2932 | = _bfd_aarch64_create_stub_section (link_section, htab); |
| 2933 | return htab->stub_group[link_section->id].stub_sec; |
| 2934 | } |
| 2935 | |
| 2936 | |
| 2937 | /* Find or create a stub section in the stub group for an input |
| 2938 | section. */ |
| 2939 | |
| 2940 | static asection * |
| 2941 | _bfd_aarch64_create_or_find_stub_sec (asection *section, |
| 2942 | struct elf_aarch64_link_hash_table *htab) |
| 2943 | { |
| 2944 | asection *link_sec = htab->stub_group[section->id].link_sec; |
| 2945 | return _bfd_aarch64_get_stub_for_link_section (link_sec, htab); |
| 2946 | } |
| 2947 | |
| 2948 | |
| 2949 | /* Add a new stub entry in the stub group associated with an input |
| 2950 | section to the stub hash. Not all fields of the new stub entry are |
| 2951 | initialised. */ |
| 2952 | |
| 2953 | static struct elf_aarch64_stub_hash_entry * |
| 2954 | _bfd_aarch64_add_stub_entry_in_group (const char *stub_name, |
| 2955 | asection *section, |
| 2956 | struct elf_aarch64_link_hash_table *htab) |
| 2957 | { |
| 2958 | asection *link_sec; |
| 2959 | asection *stub_sec; |
| 2960 | struct elf_aarch64_stub_hash_entry *stub_entry; |
| 2961 | |
| 2962 | link_sec = htab->stub_group[section->id].link_sec; |
| 2963 | stub_sec = _bfd_aarch64_create_or_find_stub_sec (section, htab); |
| 2964 | |
| 2965 | /* Enter this entry into the linker stub hash table. */ |
| 2966 | stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table, stub_name, |
| 2967 | TRUE, FALSE); |
| 2968 | if (stub_entry == NULL) |
| 2969 | { |
| 2970 | /* xgettext:c-format */ |
| 2971 | _bfd_error_handler (_("%pB: cannot create stub entry %s"), |
| 2972 | section->owner, stub_name); |
| 2973 | return NULL; |
| 2974 | } |
| 2975 | |
| 2976 | stub_entry->stub_sec = stub_sec; |
| 2977 | stub_entry->stub_offset = 0; |
| 2978 | stub_entry->id_sec = link_sec; |
| 2979 | |
| 2980 | return stub_entry; |
| 2981 | } |
| 2982 | |
| 2983 | /* Add a new stub entry in the final stub section to the stub hash. |
| 2984 | Not all fields of the new stub entry are initialised. */ |
| 2985 | |
| 2986 | static struct elf_aarch64_stub_hash_entry * |
| 2987 | _bfd_aarch64_add_stub_entry_after (const char *stub_name, |
| 2988 | asection *link_section, |
| 2989 | struct elf_aarch64_link_hash_table *htab) |
| 2990 | { |
| 2991 | asection *stub_sec; |
| 2992 | struct elf_aarch64_stub_hash_entry *stub_entry; |
| 2993 | |
| 2994 | stub_sec = _bfd_aarch64_get_stub_for_link_section (link_section, htab); |
| 2995 | stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table, stub_name, |
| 2996 | TRUE, FALSE); |
| 2997 | if (stub_entry == NULL) |
| 2998 | { |
| 2999 | _bfd_error_handler (_("cannot create stub entry %s"), stub_name); |
| 3000 | return NULL; |
| 3001 | } |
| 3002 | |
| 3003 | stub_entry->stub_sec = stub_sec; |
| 3004 | stub_entry->stub_offset = 0; |
| 3005 | stub_entry->id_sec = link_section; |
| 3006 | |
| 3007 | return stub_entry; |
| 3008 | } |
| 3009 | |
| 3010 | |
| 3011 | static bfd_boolean |
| 3012 | aarch64_build_one_stub (struct bfd_hash_entry *gen_entry, |
| 3013 | void *in_arg ATTRIBUTE_UNUSED) |
| 3014 | { |
| 3015 | struct elf_aarch64_stub_hash_entry *stub_entry; |
| 3016 | asection *stub_sec; |
| 3017 | bfd *stub_bfd; |
| 3018 | bfd_byte *loc; |
| 3019 | bfd_vma sym_value; |
| 3020 | bfd_vma veneered_insn_loc; |
| 3021 | bfd_vma veneer_entry_loc; |
| 3022 | bfd_signed_vma branch_offset = 0; |
| 3023 | unsigned int template_size; |
| 3024 | const uint32_t *template; |
| 3025 | unsigned int i; |
| 3026 | |
| 3027 | /* Massage our args to the form they really have. */ |
| 3028 | stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry; |
| 3029 | |
| 3030 | stub_sec = stub_entry->stub_sec; |
| 3031 | |
| 3032 | /* Make a note of the offset within the stubs for this entry. */ |
| 3033 | stub_entry->stub_offset = stub_sec->size; |
| 3034 | loc = stub_sec->contents + stub_entry->stub_offset; |
| 3035 | |
| 3036 | stub_bfd = stub_sec->owner; |
| 3037 | |
| 3038 | /* This is the address of the stub destination. */ |
| 3039 | sym_value = (stub_entry->target_value |
| 3040 | + stub_entry->target_section->output_offset |
| 3041 | + stub_entry->target_section->output_section->vma); |
| 3042 | |
| 3043 | if (stub_entry->stub_type == aarch64_stub_long_branch) |
| 3044 | { |
| 3045 | bfd_vma place = (stub_entry->stub_offset + stub_sec->output_section->vma |
| 3046 | + stub_sec->output_offset); |
| 3047 | |
| 3048 | /* See if we can relax the stub. */ |
| 3049 | if (aarch64_valid_for_adrp_p (sym_value, place)) |
| 3050 | stub_entry->stub_type = aarch64_select_branch_stub (sym_value, place); |
| 3051 | } |
| 3052 | |
| 3053 | switch (stub_entry->stub_type) |
| 3054 | { |
| 3055 | case aarch64_stub_adrp_branch: |
| 3056 | template = aarch64_adrp_branch_stub; |
| 3057 | template_size = sizeof (aarch64_adrp_branch_stub); |
| 3058 | break; |
| 3059 | case aarch64_stub_long_branch: |
| 3060 | template = aarch64_long_branch_stub; |
| 3061 | template_size = sizeof (aarch64_long_branch_stub); |
| 3062 | break; |
| 3063 | case aarch64_stub_erratum_835769_veneer: |
| 3064 | template = aarch64_erratum_835769_stub; |
| 3065 | template_size = sizeof (aarch64_erratum_835769_stub); |
| 3066 | break; |
| 3067 | case aarch64_stub_erratum_843419_veneer: |
| 3068 | template = aarch64_erratum_843419_stub; |
| 3069 | template_size = sizeof (aarch64_erratum_843419_stub); |
| 3070 | break; |
| 3071 | default: |
| 3072 | abort (); |
| 3073 | } |
| 3074 | |
| 3075 | for (i = 0; i < (template_size / sizeof template[0]); i++) |
| 3076 | { |
| 3077 | bfd_putl32 (template[i], loc); |
| 3078 | loc += 4; |
| 3079 | } |
| 3080 | |
| 3081 | template_size = (template_size + 7) & ~7; |
| 3082 | stub_sec->size += template_size; |
| 3083 | |
| 3084 | switch (stub_entry->stub_type) |
| 3085 | { |
| 3086 | case aarch64_stub_adrp_branch: |
| 3087 | if (!aarch64_relocate (AARCH64_R (ADR_PREL_PG_HI21), stub_bfd, stub_sec, |
| 3088 | stub_entry->stub_offset, sym_value)) |
| 3089 | /* The stub would not have been relaxed if the offset was out |
| 3090 | of range. */ |
| 3091 | BFD_FAIL (); |
| 3092 | |
| 3093 | if (!aarch64_relocate (AARCH64_R (ADD_ABS_LO12_NC), stub_bfd, stub_sec, |
| 3094 | stub_entry->stub_offset + 4, sym_value)) |
| 3095 | BFD_FAIL (); |
| 3096 | break; |
| 3097 | |
| 3098 | case aarch64_stub_long_branch: |
| 3099 | /* We want the value relative to the address 12 bytes back from the |
| 3100 | value itself. */ |
| 3101 | if (!aarch64_relocate (AARCH64_R (PRELNN), stub_bfd, stub_sec, |
| 3102 | stub_entry->stub_offset + 16, sym_value + 12)) |
| 3103 | BFD_FAIL (); |
| 3104 | break; |
| 3105 | |
| 3106 | case aarch64_stub_erratum_835769_veneer: |
| 3107 | veneered_insn_loc = stub_entry->target_section->output_section->vma |
| 3108 | + stub_entry->target_section->output_offset |
| 3109 | + stub_entry->target_value; |
| 3110 | veneer_entry_loc = stub_entry->stub_sec->output_section->vma |
| 3111 | + stub_entry->stub_sec->output_offset |
| 3112 | + stub_entry->stub_offset; |
| 3113 | branch_offset = veneered_insn_loc - veneer_entry_loc; |
| 3114 | branch_offset >>= 2; |
| 3115 | branch_offset &= 0x3ffffff; |
| 3116 | bfd_putl32 (stub_entry->veneered_insn, |
| 3117 | stub_sec->contents + stub_entry->stub_offset); |
| 3118 | bfd_putl32 (template[1] | branch_offset, |
| 3119 | stub_sec->contents + stub_entry->stub_offset + 4); |
| 3120 | break; |
| 3121 | |
| 3122 | case aarch64_stub_erratum_843419_veneer: |
| 3123 | if (!aarch64_relocate (AARCH64_R (JUMP26), stub_bfd, stub_sec, |
| 3124 | stub_entry->stub_offset + 4, sym_value + 4)) |
| 3125 | BFD_FAIL (); |
| 3126 | break; |
| 3127 | |
| 3128 | default: |
| 3129 | abort (); |
| 3130 | } |
| 3131 | |
| 3132 | return TRUE; |
| 3133 | } |
| 3134 | |
| 3135 | /* As above, but don't actually build the stub. Just bump offset so |
| 3136 | we know stub section sizes. */ |
| 3137 | |
| 3138 | static bfd_boolean |
| 3139 | aarch64_size_one_stub (struct bfd_hash_entry *gen_entry, |
| 3140 | void *in_arg ATTRIBUTE_UNUSED) |
| 3141 | { |
| 3142 | struct elf_aarch64_stub_hash_entry *stub_entry; |
| 3143 | int size; |
| 3144 | |
| 3145 | /* Massage our args to the form they really have. */ |
| 3146 | stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry; |
| 3147 | |
| 3148 | switch (stub_entry->stub_type) |
| 3149 | { |
| 3150 | case aarch64_stub_adrp_branch: |
| 3151 | size = sizeof (aarch64_adrp_branch_stub); |
| 3152 | break; |
| 3153 | case aarch64_stub_long_branch: |
| 3154 | size = sizeof (aarch64_long_branch_stub); |
| 3155 | break; |
| 3156 | case aarch64_stub_erratum_835769_veneer: |
| 3157 | size = sizeof (aarch64_erratum_835769_stub); |
| 3158 | break; |
| 3159 | case aarch64_stub_erratum_843419_veneer: |
| 3160 | size = sizeof (aarch64_erratum_843419_stub); |
| 3161 | break; |
| 3162 | default: |
| 3163 | abort (); |
| 3164 | } |
| 3165 | |
| 3166 | size = (size + 7) & ~7; |
| 3167 | stub_entry->stub_sec->size += size; |
| 3168 | return TRUE; |
| 3169 | } |
| 3170 | |
| 3171 | /* External entry points for sizing and building linker stubs. */ |
| 3172 | |
| 3173 | /* Set up various things so that we can make a list of input sections |
| 3174 | for each output section included in the link. Returns -1 on error, |
| 3175 | 0 when no stubs will be needed, and 1 on success. */ |
| 3176 | |
| 3177 | int |
| 3178 | elfNN_aarch64_setup_section_lists (bfd *output_bfd, |
| 3179 | struct bfd_link_info *info) |
| 3180 | { |
| 3181 | bfd *input_bfd; |
| 3182 | unsigned int bfd_count; |
| 3183 | unsigned int top_id, top_index; |
| 3184 | asection *section; |
| 3185 | asection **input_list, **list; |
| 3186 | bfd_size_type amt; |
| 3187 | struct elf_aarch64_link_hash_table *htab = |
| 3188 | elf_aarch64_hash_table (info); |
| 3189 | |
| 3190 | if (!is_elf_hash_table (htab)) |
| 3191 | return 0; |
| 3192 | |
| 3193 | /* Count the number of input BFDs and find the top input section id. */ |
| 3194 | for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0; |
| 3195 | input_bfd != NULL; input_bfd = input_bfd->link.next) |
| 3196 | { |
| 3197 | bfd_count += 1; |
| 3198 | for (section = input_bfd->sections; |
| 3199 | section != NULL; section = section->next) |
| 3200 | { |
| 3201 | if (top_id < section->id) |
| 3202 | top_id = section->id; |
| 3203 | } |
| 3204 | } |
| 3205 | htab->bfd_count = bfd_count; |
| 3206 | |
| 3207 | amt = sizeof (struct map_stub) * (top_id + 1); |
| 3208 | htab->stub_group = bfd_zmalloc (amt); |
| 3209 | if (htab->stub_group == NULL) |
| 3210 | return -1; |
| 3211 | |
| 3212 | /* We can't use output_bfd->section_count here to find the top output |
| 3213 | section index as some sections may have been removed, and |
| 3214 | _bfd_strip_section_from_output doesn't renumber the indices. */ |
| 3215 | for (section = output_bfd->sections, top_index = 0; |
| 3216 | section != NULL; section = section->next) |
| 3217 | { |
| 3218 | if (top_index < section->index) |
| 3219 | top_index = section->index; |
| 3220 | } |
| 3221 | |
| 3222 | htab->top_index = top_index; |
| 3223 | amt = sizeof (asection *) * (top_index + 1); |
| 3224 | input_list = bfd_malloc (amt); |
| 3225 | htab->input_list = input_list; |
| 3226 | if (input_list == NULL) |
| 3227 | return -1; |
| 3228 | |
| 3229 | /* For sections we aren't interested in, mark their entries with a |
| 3230 | value we can check later. */ |
| 3231 | list = input_list + top_index; |
| 3232 | do |
| 3233 | *list = bfd_abs_section_ptr; |
| 3234 | while (list-- != input_list); |
| 3235 | |
| 3236 | for (section = output_bfd->sections; |
| 3237 | section != NULL; section = section->next) |
| 3238 | { |
| 3239 | if ((section->flags & SEC_CODE) != 0) |
| 3240 | input_list[section->index] = NULL; |
| 3241 | } |
| 3242 | |
| 3243 | return 1; |
| 3244 | } |
| 3245 | |
| 3246 | /* Used by elfNN_aarch64_next_input_section and group_sections. */ |
| 3247 | #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec) |
| 3248 | |
| 3249 | /* The linker repeatedly calls this function for each input section, |
| 3250 | in the order that input sections are linked into output sections. |
| 3251 | Build lists of input sections to determine groupings between which |
| 3252 | we may insert linker stubs. */ |
| 3253 | |
| 3254 | void |
| 3255 | elfNN_aarch64_next_input_section (struct bfd_link_info *info, asection *isec) |
| 3256 | { |
| 3257 | struct elf_aarch64_link_hash_table *htab = |
| 3258 | elf_aarch64_hash_table (info); |
| 3259 | |
| 3260 | if (isec->output_section->index <= htab->top_index) |
| 3261 | { |
| 3262 | asection **list = htab->input_list + isec->output_section->index; |
| 3263 | |
| 3264 | if (*list != bfd_abs_section_ptr) |
| 3265 | { |
| 3266 | /* Steal the link_sec pointer for our list. */ |
| 3267 | /* This happens to make the list in reverse order, |
| 3268 | which is what we want. */ |
| 3269 | PREV_SEC (isec) = *list; |
| 3270 | *list = isec; |
| 3271 | } |
| 3272 | } |
| 3273 | } |
| 3274 | |
| 3275 | /* See whether we can group stub sections together. Grouping stub |
| 3276 | sections may result in fewer stubs. More importantly, we need to |
| 3277 | put all .init* and .fini* stubs at the beginning of the .init or |
| 3278 | .fini output sections respectively, because glibc splits the |
| 3279 | _init and _fini functions into multiple parts. Putting a stub in |
| 3280 | the middle of a function is not a good idea. */ |
| 3281 | |
| 3282 | static void |
| 3283 | group_sections (struct elf_aarch64_link_hash_table *htab, |
| 3284 | bfd_size_type stub_group_size, |
| 3285 | bfd_boolean stubs_always_before_branch) |
| 3286 | { |
| 3287 | asection **list = htab->input_list + htab->top_index; |
| 3288 | |
| 3289 | do |
| 3290 | { |
| 3291 | asection *tail = *list; |
| 3292 | |
| 3293 | if (tail == bfd_abs_section_ptr) |
| 3294 | continue; |
| 3295 | |
| 3296 | while (tail != NULL) |
| 3297 | { |
| 3298 | asection *curr; |
| 3299 | asection *prev; |
| 3300 | bfd_size_type total; |
| 3301 | |
| 3302 | curr = tail; |
| 3303 | total = tail->size; |
| 3304 | while ((prev = PREV_SEC (curr)) != NULL |
| 3305 | && ((total += curr->output_offset - prev->output_offset) |
| 3306 | < stub_group_size)) |
| 3307 | curr = prev; |
| 3308 | |
| 3309 | /* OK, the size from the start of CURR to the end is less |
| 3310 | than stub_group_size and thus can be handled by one stub |
| 3311 | section. (Or the tail section is itself larger than |
| 3312 | stub_group_size, in which case we may be toast.) |
| 3313 | We should really be keeping track of the total size of |
| 3314 | stubs added here, as stubs contribute to the final output |
| 3315 | section size. */ |
| 3316 | do |
| 3317 | { |
| 3318 | prev = PREV_SEC (tail); |
| 3319 | /* Set up this stub group. */ |
| 3320 | htab->stub_group[tail->id].link_sec = curr; |
| 3321 | } |
| 3322 | while (tail != curr && (tail = prev) != NULL); |
| 3323 | |
| 3324 | /* But wait, there's more! Input sections up to stub_group_size |
| 3325 | bytes before the stub section can be handled by it too. */ |
| 3326 | if (!stubs_always_before_branch) |
| 3327 | { |
| 3328 | total = 0; |
| 3329 | while (prev != NULL |
| 3330 | && ((total += tail->output_offset - prev->output_offset) |
| 3331 | < stub_group_size)) |
| 3332 | { |
| 3333 | tail = prev; |
| 3334 | prev = PREV_SEC (tail); |
| 3335 | htab->stub_group[tail->id].link_sec = curr; |
| 3336 | } |
| 3337 | } |
| 3338 | tail = prev; |
| 3339 | } |
| 3340 | } |
| 3341 | while (list-- != htab->input_list); |
| 3342 | |
| 3343 | free (htab->input_list); |
| 3344 | } |
| 3345 | |
| 3346 | #undef PREV_SEC |
| 3347 | |
| 3348 | #define AARCH64_BITS(x, pos, n) (((x) >> (pos)) & ((1 << (n)) - 1)) |
| 3349 | |
| 3350 | #define AARCH64_RT(insn) AARCH64_BITS (insn, 0, 5) |
| 3351 | #define AARCH64_RT2(insn) AARCH64_BITS (insn, 10, 5) |
| 3352 | #define AARCH64_RA(insn) AARCH64_BITS (insn, 10, 5) |
| 3353 | #define AARCH64_RD(insn) AARCH64_BITS (insn, 0, 5) |
| 3354 | #define AARCH64_RN(insn) AARCH64_BITS (insn, 5, 5) |
| 3355 | #define AARCH64_RM(insn) AARCH64_BITS (insn, 16, 5) |
| 3356 | |
| 3357 | #define AARCH64_MAC(insn) (((insn) & 0xff000000) == 0x9b000000) |
| 3358 | #define AARCH64_BIT(insn, n) AARCH64_BITS (insn, n, 1) |
| 3359 | #define AARCH64_OP31(insn) AARCH64_BITS (insn, 21, 3) |
| 3360 | #define AARCH64_ZR 0x1f |
| 3361 | |
| 3362 | /* All ld/st ops. See C4-182 of the ARM ARM. The encoding space for |
| 3363 | LD_PCREL, LDST_RO, LDST_UI and LDST_UIMM cover prefetch ops. */ |
| 3364 | |
| 3365 | #define AARCH64_LD(insn) (AARCH64_BIT (insn, 22) == 1) |
| 3366 | #define AARCH64_LDST(insn) (((insn) & 0x0a000000) == 0x08000000) |
| 3367 | #define AARCH64_LDST_EX(insn) (((insn) & 0x3f000000) == 0x08000000) |
| 3368 | #define AARCH64_LDST_PCREL(insn) (((insn) & 0x3b000000) == 0x18000000) |
| 3369 | #define AARCH64_LDST_NAP(insn) (((insn) & 0x3b800000) == 0x28000000) |
| 3370 | #define AARCH64_LDSTP_PI(insn) (((insn) & 0x3b800000) == 0x28800000) |
| 3371 | #define AARCH64_LDSTP_O(insn) (((insn) & 0x3b800000) == 0x29000000) |
| 3372 | #define AARCH64_LDSTP_PRE(insn) (((insn) & 0x3b800000) == 0x29800000) |
| 3373 | #define AARCH64_LDST_UI(insn) (((insn) & 0x3b200c00) == 0x38000000) |
| 3374 | #define AARCH64_LDST_PIIMM(insn) (((insn) & 0x3b200c00) == 0x38000400) |
| 3375 | #define AARCH64_LDST_U(insn) (((insn) & 0x3b200c00) == 0x38000800) |
| 3376 | #define AARCH64_LDST_PREIMM(insn) (((insn) & 0x3b200c00) == 0x38000c00) |
| 3377 | #define AARCH64_LDST_RO(insn) (((insn) & 0x3b200c00) == 0x38200800) |
| 3378 | #define AARCH64_LDST_UIMM(insn) (((insn) & 0x3b000000) == 0x39000000) |
| 3379 | #define AARCH64_LDST_SIMD_M(insn) (((insn) & 0xbfbf0000) == 0x0c000000) |
| 3380 | #define AARCH64_LDST_SIMD_M_PI(insn) (((insn) & 0xbfa00000) == 0x0c800000) |
| 3381 | #define AARCH64_LDST_SIMD_S(insn) (((insn) & 0xbf9f0000) == 0x0d000000) |
| 3382 | #define AARCH64_LDST_SIMD_S_PI(insn) (((insn) & 0xbf800000) == 0x0d800000) |
| 3383 | |
| 3384 | /* Classify an INSN if it is indeed a load/store. |
| 3385 | |
| 3386 | Return TRUE if INSN is a LD/ST instruction otherwise return FALSE. |
| 3387 | |
| 3388 | For scalar LD/ST instructions PAIR is FALSE, RT is returned and RT2 |
| 3389 | is set equal to RT. |
| 3390 | |
| 3391 | For LD/ST pair instructions PAIR is TRUE, RT and RT2 are returned. */ |
| 3392 | |
| 3393 | static bfd_boolean |
| 3394 | aarch64_mem_op_p (uint32_t insn, unsigned int *rt, unsigned int *rt2, |
| 3395 | bfd_boolean *pair, bfd_boolean *load) |
| 3396 | { |
| 3397 | uint32_t opcode; |
| 3398 | unsigned int r; |
| 3399 | uint32_t opc = 0; |
| 3400 | uint32_t v = 0; |
| 3401 | uint32_t opc_v = 0; |
| 3402 | |
| 3403 | /* Bail out quickly if INSN doesn't fall into the load-store |
| 3404 | encoding space. */ |
| 3405 | if (!AARCH64_LDST (insn)) |
| 3406 | return FALSE; |
| 3407 | |
| 3408 | *pair = FALSE; |
| 3409 | *load = FALSE; |
| 3410 | if (AARCH64_LDST_EX (insn)) |
| 3411 | { |
| 3412 | *rt = AARCH64_RT (insn); |
| 3413 | *rt2 = *rt; |
| 3414 | if (AARCH64_BIT (insn, 21) == 1) |
| 3415 | { |
| 3416 | *pair = TRUE; |
| 3417 | *rt2 = AARCH64_RT2 (insn); |
| 3418 | } |
| 3419 | *load = AARCH64_LD (insn); |
| 3420 | return TRUE; |
| 3421 | } |
| 3422 | else if (AARCH64_LDST_NAP (insn) |
| 3423 | || AARCH64_LDSTP_PI (insn) |
| 3424 | || AARCH64_LDSTP_O (insn) |
| 3425 | || AARCH64_LDSTP_PRE (insn)) |
| 3426 | { |
| 3427 | *pair = TRUE; |
| 3428 | *rt = AARCH64_RT (insn); |
| 3429 | *rt2 = AARCH64_RT2 (insn); |
| 3430 | *load = AARCH64_LD (insn); |
| 3431 | return TRUE; |
| 3432 | } |
| 3433 | else if (AARCH64_LDST_PCREL (insn) |
| 3434 | || AARCH64_LDST_UI (insn) |
| 3435 | || AARCH64_LDST_PIIMM (insn) |
| 3436 | || AARCH64_LDST_U (insn) |
| 3437 | || AARCH64_LDST_PREIMM (insn) |
| 3438 | || AARCH64_LDST_RO (insn) |
| 3439 | || AARCH64_LDST_UIMM (insn)) |
| 3440 | { |
| 3441 | *rt = AARCH64_RT (insn); |
| 3442 | *rt2 = *rt; |
| 3443 | if (AARCH64_LDST_PCREL (insn)) |
| 3444 | *load = TRUE; |
| 3445 | opc = AARCH64_BITS (insn, 22, 2); |
| 3446 | v = AARCH64_BIT (insn, 26); |
| 3447 | opc_v = opc | (v << 2); |
| 3448 | *load = (opc_v == 1 || opc_v == 2 || opc_v == 3 |
| 3449 | || opc_v == 5 || opc_v == 7); |
| 3450 | return TRUE; |
| 3451 | } |
| 3452 | else if (AARCH64_LDST_SIMD_M (insn) |
| 3453 | || AARCH64_LDST_SIMD_M_PI (insn)) |
| 3454 | { |
| 3455 | *rt = AARCH64_RT (insn); |
| 3456 | *load = AARCH64_BIT (insn, 22); |
| 3457 | opcode = (insn >> 12) & 0xf; |
| 3458 | switch (opcode) |
| 3459 | { |
| 3460 | case 0: |
| 3461 | case 2: |
| 3462 | *rt2 = *rt + 3; |
| 3463 | break; |
| 3464 | |
| 3465 | case 4: |
| 3466 | case 6: |
| 3467 | *rt2 = *rt + 2; |
| 3468 | break; |
| 3469 | |
| 3470 | case 7: |
| 3471 | *rt2 = *rt; |
| 3472 | break; |
| 3473 | |
| 3474 | case 8: |
| 3475 | case 10: |
| 3476 | *rt2 = *rt + 1; |
| 3477 | break; |
| 3478 | |
| 3479 | default: |
| 3480 | return FALSE; |
| 3481 | } |
| 3482 | return TRUE; |
| 3483 | } |
| 3484 | else if (AARCH64_LDST_SIMD_S (insn) |
| 3485 | || AARCH64_LDST_SIMD_S_PI (insn)) |
| 3486 | { |
| 3487 | *rt = AARCH64_RT (insn); |
| 3488 | r = (insn >> 21) & 1; |
| 3489 | *load = AARCH64_BIT (insn, 22); |
| 3490 | opcode = (insn >> 13) & 0x7; |
| 3491 | switch (opcode) |
| 3492 | { |
| 3493 | case 0: |
| 3494 | case 2: |
| 3495 | case 4: |
| 3496 | *rt2 = *rt + r; |
| 3497 | break; |
| 3498 | |
| 3499 | case 1: |
| 3500 | case 3: |
| 3501 | case 5: |
| 3502 | *rt2 = *rt + (r == 0 ? 2 : 3); |
| 3503 | break; |
| 3504 | |
| 3505 | case 6: |
| 3506 | *rt2 = *rt + r; |
| 3507 | break; |
| 3508 | |
| 3509 | case 7: |
| 3510 | *rt2 = *rt + (r == 0 ? 2 : 3); |
| 3511 | break; |
| 3512 | |
| 3513 | default: |
| 3514 | return FALSE; |
| 3515 | } |
| 3516 | return TRUE; |
| 3517 | } |
| 3518 | |
| 3519 | return FALSE; |
| 3520 | } |
| 3521 | |
| 3522 | /* Return TRUE if INSN is multiply-accumulate. */ |
| 3523 | |
| 3524 | static bfd_boolean |
| 3525 | aarch64_mlxl_p (uint32_t insn) |
| 3526 | { |
| 3527 | uint32_t op31 = AARCH64_OP31 (insn); |
| 3528 | |
| 3529 | if (AARCH64_MAC (insn) |
| 3530 | && (op31 == 0 || op31 == 1 || op31 == 5) |
| 3531 | /* Exclude MUL instructions which are encoded as a multiple accumulate |
| 3532 | with RA = XZR. */ |
| 3533 | && AARCH64_RA (insn) != AARCH64_ZR) |
| 3534 | return TRUE; |
| 3535 | |
| 3536 | return FALSE; |
| 3537 | } |
| 3538 | |
| 3539 | /* Some early revisions of the Cortex-A53 have an erratum (835769) whereby |
| 3540 | it is possible for a 64-bit multiply-accumulate instruction to generate an |
| 3541 | incorrect result. The details are quite complex and hard to |
| 3542 | determine statically, since branches in the code may exist in some |
| 3543 | circumstances, but all cases end with a memory (load, store, or |
| 3544 | prefetch) instruction followed immediately by the multiply-accumulate |
| 3545 | operation. We employ a linker patching technique, by moving the potentially |
| 3546 | affected multiply-accumulate instruction into a patch region and replacing |
| 3547 | the original instruction with a branch to the patch. This function checks |
| 3548 | if INSN_1 is the memory operation followed by a multiply-accumulate |
| 3549 | operation (INSN_2). Return TRUE if an erratum sequence is found, FALSE |
| 3550 | if INSN_1 and INSN_2 are safe. */ |
| 3551 | |
| 3552 | static bfd_boolean |
| 3553 | aarch64_erratum_sequence (uint32_t insn_1, uint32_t insn_2) |
| 3554 | { |
| 3555 | uint32_t rt; |
| 3556 | uint32_t rt2; |
| 3557 | uint32_t rn; |
| 3558 | uint32_t rm; |
| 3559 | uint32_t ra; |
| 3560 | bfd_boolean pair; |
| 3561 | bfd_boolean load; |
| 3562 | |
| 3563 | if (aarch64_mlxl_p (insn_2) |
| 3564 | && aarch64_mem_op_p (insn_1, &rt, &rt2, &pair, &load)) |
| 3565 | { |
| 3566 | /* Any SIMD memory op is independent of the subsequent MLA |
| 3567 | by definition of the erratum. */ |
| 3568 | if (AARCH64_BIT (insn_1, 26)) |
| 3569 | return TRUE; |
| 3570 | |
| 3571 | /* If not SIMD, check for integer memory ops and MLA relationship. */ |
| 3572 | rn = AARCH64_RN (insn_2); |
| 3573 | ra = AARCH64_RA (insn_2); |
| 3574 | rm = AARCH64_RM (insn_2); |
| 3575 | |
| 3576 | /* If this is a load and there's a true(RAW) dependency, we are safe |
| 3577 | and this is not an erratum sequence. */ |
| 3578 | if (load && |
| 3579 | (rt == rn || rt == rm || rt == ra |
| 3580 | || (pair && (rt2 == rn || rt2 == rm || rt2 == ra)))) |
| 3581 | return FALSE; |
| 3582 | |
| 3583 | /* We conservatively put out stubs for all other cases (including |
| 3584 | writebacks). */ |
| 3585 | return TRUE; |
| 3586 | } |
| 3587 | |
| 3588 | return FALSE; |
| 3589 | } |
| 3590 | |
| 3591 | /* Used to order a list of mapping symbols by address. */ |
| 3592 | |
| 3593 | static int |
| 3594 | elf_aarch64_compare_mapping (const void *a, const void *b) |
| 3595 | { |
| 3596 | const elf_aarch64_section_map *amap = (const elf_aarch64_section_map *) a; |
| 3597 | const elf_aarch64_section_map *bmap = (const elf_aarch64_section_map *) b; |
| 3598 | |
| 3599 | if (amap->vma > bmap->vma) |
| 3600 | return 1; |
| 3601 | else if (amap->vma < bmap->vma) |
| 3602 | return -1; |
| 3603 | else if (amap->type > bmap->type) |
| 3604 | /* Ensure results do not depend on the host qsort for objects with |
| 3605 | multiple mapping symbols at the same address by sorting on type |
| 3606 | after vma. */ |
| 3607 | return 1; |
| 3608 | else if (amap->type < bmap->type) |
| 3609 | return -1; |
| 3610 | else |
| 3611 | return 0; |
| 3612 | } |
| 3613 | |
| 3614 | |
| 3615 | static char * |
| 3616 | _bfd_aarch64_erratum_835769_stub_name (unsigned num_fixes) |
| 3617 | { |
| 3618 | char *stub_name = (char *) bfd_malloc |
| 3619 | (strlen ("__erratum_835769_veneer_") + 16); |
| 3620 | sprintf (stub_name,"__erratum_835769_veneer_%d", num_fixes); |
| 3621 | return stub_name; |
| 3622 | } |
| 3623 | |
| 3624 | /* Scan for Cortex-A53 erratum 835769 sequence. |
| 3625 | |
| 3626 | Return TRUE else FALSE on abnormal termination. */ |
| 3627 | |
| 3628 | static bfd_boolean |
| 3629 | _bfd_aarch64_erratum_835769_scan (bfd *input_bfd, |
| 3630 | struct bfd_link_info *info, |
| 3631 | unsigned int *num_fixes_p) |
| 3632 | { |
| 3633 | asection *section; |
| 3634 | struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info); |
| 3635 | unsigned int num_fixes = *num_fixes_p; |
| 3636 | |
| 3637 | if (htab == NULL) |
| 3638 | return TRUE; |
| 3639 | |
| 3640 | for (section = input_bfd->sections; |
| 3641 | section != NULL; |
| 3642 | section = section->next) |
| 3643 | { |
| 3644 | bfd_byte *contents = NULL; |
| 3645 | struct _aarch64_elf_section_data *sec_data; |
| 3646 | unsigned int span; |
| 3647 | |
| 3648 | if (elf_section_type (section) != SHT_PROGBITS |
| 3649 | || (elf_section_flags (section) & SHF_EXECINSTR) == 0 |
| 3650 | || (section->flags & SEC_EXCLUDE) != 0 |
| 3651 | || (section->sec_info_type == SEC_INFO_TYPE_JUST_SYMS) |
| 3652 | || (section->output_section == bfd_abs_section_ptr)) |
| 3653 | continue; |
| 3654 | |
| 3655 | if (elf_section_data (section)->this_hdr.contents != NULL) |
| 3656 | contents = elf_section_data (section)->this_hdr.contents; |
| 3657 | else if (! bfd_malloc_and_get_section (input_bfd, section, &contents)) |
| 3658 | return FALSE; |
| 3659 | |
| 3660 | sec_data = elf_aarch64_section_data (section); |
| 3661 | |
| 3662 | qsort (sec_data->map, sec_data->mapcount, |
| 3663 | sizeof (elf_aarch64_section_map), elf_aarch64_compare_mapping); |
| 3664 | |
| 3665 | for (span = 0; span < sec_data->mapcount; span++) |
| 3666 | { |
| 3667 | unsigned int span_start = sec_data->map[span].vma; |
| 3668 | unsigned int span_end = ((span == sec_data->mapcount - 1) |
| 3669 | ? sec_data->map[0].vma + section->size |
| 3670 | : sec_data->map[span + 1].vma); |
| 3671 | unsigned int i; |
| 3672 | char span_type = sec_data->map[span].type; |
| 3673 | |
| 3674 | if (span_type == 'd') |
| 3675 | continue; |
| 3676 | |
| 3677 | for (i = span_start; i + 4 < span_end; i += 4) |
| 3678 | { |
| 3679 | uint32_t insn_1 = bfd_getl32 (contents + i); |
| 3680 | uint32_t insn_2 = bfd_getl32 (contents + i + 4); |
| 3681 | |
| 3682 | if (aarch64_erratum_sequence (insn_1, insn_2)) |
| 3683 | { |
| 3684 | struct elf_aarch64_stub_hash_entry *stub_entry; |
| 3685 | char *stub_name = _bfd_aarch64_erratum_835769_stub_name (num_fixes); |
| 3686 | if (! stub_name) |
| 3687 | return FALSE; |
| 3688 | |
| 3689 | stub_entry = _bfd_aarch64_add_stub_entry_in_group (stub_name, |
| 3690 | section, |
| 3691 | htab); |
| 3692 | if (! stub_entry) |
| 3693 | return FALSE; |
| 3694 | |
| 3695 | stub_entry->stub_type = aarch64_stub_erratum_835769_veneer; |
| 3696 | stub_entry->target_section = section; |
| 3697 | stub_entry->target_value = i + 4; |
| 3698 | stub_entry->veneered_insn = insn_2; |
| 3699 | stub_entry->output_name = stub_name; |
| 3700 | num_fixes++; |
| 3701 | } |
| 3702 | } |
| 3703 | } |
| 3704 | if (elf_section_data (section)->this_hdr.contents == NULL) |
| 3705 | free (contents); |
| 3706 | } |
| 3707 | |
| 3708 | *num_fixes_p = num_fixes; |
| 3709 | |
| 3710 | return TRUE; |
| 3711 | } |
| 3712 | |
| 3713 | |
| 3714 | /* Test if instruction INSN is ADRP. */ |
| 3715 | |
| 3716 | static bfd_boolean |
| 3717 | _bfd_aarch64_adrp_p (uint32_t insn) |
| 3718 | { |
| 3719 | return ((insn & 0x9f000000) == 0x90000000); |
| 3720 | } |
| 3721 | |
| 3722 | |
| 3723 | /* Helper predicate to look for cortex-a53 erratum 843419 sequence 1. */ |
| 3724 | |
| 3725 | static bfd_boolean |
| 3726 | _bfd_aarch64_erratum_843419_sequence_p (uint32_t insn_1, uint32_t insn_2, |
| 3727 | uint32_t insn_3) |
| 3728 | { |
| 3729 | uint32_t rt; |
| 3730 | uint32_t rt2; |
| 3731 | bfd_boolean pair; |
| 3732 | bfd_boolean load; |
| 3733 | |
| 3734 | return (aarch64_mem_op_p (insn_2, &rt, &rt2, &pair, &load) |
| 3735 | && (!pair |
| 3736 | || (pair && !load)) |
| 3737 | && AARCH64_LDST_UIMM (insn_3) |
| 3738 | && AARCH64_RN (insn_3) == AARCH64_RD (insn_1)); |
| 3739 | } |
| 3740 | |
| 3741 | |
| 3742 | /* Test for the presence of Cortex-A53 erratum 843419 instruction sequence. |
| 3743 | |
| 3744 | Return TRUE if section CONTENTS at offset I contains one of the |
| 3745 | erratum 843419 sequences, otherwise return FALSE. If a sequence is |
| 3746 | seen set P_VENEER_I to the offset of the final LOAD/STORE |
| 3747 | instruction in the sequence. |
| 3748 | */ |
| 3749 | |
| 3750 | static bfd_boolean |
| 3751 | _bfd_aarch64_erratum_843419_p (bfd_byte *contents, bfd_vma vma, |
| 3752 | bfd_vma i, bfd_vma span_end, |
| 3753 | bfd_vma *p_veneer_i) |
| 3754 | { |
| 3755 | uint32_t insn_1 = bfd_getl32 (contents + i); |
| 3756 | |
| 3757 | if (!_bfd_aarch64_adrp_p (insn_1)) |
| 3758 | return FALSE; |
| 3759 | |
| 3760 | if (span_end < i + 12) |
| 3761 | return FALSE; |
| 3762 | |
| 3763 | uint32_t insn_2 = bfd_getl32 (contents + i + 4); |
| 3764 | uint32_t insn_3 = bfd_getl32 (contents + i + 8); |
| 3765 | |
| 3766 | if ((vma & 0xfff) != 0xff8 && (vma & 0xfff) != 0xffc) |
| 3767 | return FALSE; |
| 3768 | |
| 3769 | if (_bfd_aarch64_erratum_843419_sequence_p (insn_1, insn_2, insn_3)) |
| 3770 | { |
| 3771 | *p_veneer_i = i + 8; |
| 3772 | return TRUE; |
| 3773 | } |
| 3774 | |
| 3775 | if (span_end < i + 16) |
| 3776 | return FALSE; |
| 3777 | |
| 3778 | uint32_t insn_4 = bfd_getl32 (contents + i + 12); |
| 3779 | |
| 3780 | if (_bfd_aarch64_erratum_843419_sequence_p (insn_1, insn_2, insn_4)) |
| 3781 | { |
| 3782 | *p_veneer_i = i + 12; |
| 3783 | return TRUE; |
| 3784 | } |
| 3785 | |
| 3786 | return FALSE; |
| 3787 | } |
| 3788 | |
| 3789 | |
| 3790 | /* Resize all stub sections. */ |
| 3791 | |
| 3792 | static void |
| 3793 | _bfd_aarch64_resize_stubs (struct elf_aarch64_link_hash_table *htab) |
| 3794 | { |
| 3795 | asection *section; |
| 3796 | |
| 3797 | /* OK, we've added some stubs. Find out the new size of the |
| 3798 | stub sections. */ |
| 3799 | for (section = htab->stub_bfd->sections; |
| 3800 | section != NULL; section = section->next) |
| 3801 | { |
| 3802 | /* Ignore non-stub sections. */ |
| 3803 | if (!strstr (section->name, STUB_SUFFIX)) |
| 3804 | continue; |
| 3805 | section->size = 0; |
| 3806 | } |
| 3807 | |
| 3808 | bfd_hash_traverse (&htab->stub_hash_table, aarch64_size_one_stub, htab); |
| 3809 | |
| 3810 | for (section = htab->stub_bfd->sections; |
| 3811 | section != NULL; section = section->next) |
| 3812 | { |
| 3813 | if (!strstr (section->name, STUB_SUFFIX)) |
| 3814 | continue; |
| 3815 | |
| 3816 | /* Add space for a branch. Add 8 bytes to keep section 8 byte aligned, |
| 3817 | as long branch stubs contain a 64-bit address. */ |
| 3818 | if (section->size) |
| 3819 | section->size += 8; |
| 3820 | |
| 3821 | /* Ensure all stub sections have a size which is a multiple of |
| 3822 | 4096. This is important in order to ensure that the insertion |
| 3823 | of stub sections does not in itself move existing code around |
| 3824 | in such a way that new errata sequences are created. */ |
| 3825 | if (htab->fix_erratum_843419) |
| 3826 | if (section->size) |
| 3827 | section->size = BFD_ALIGN (section->size, 0x1000); |
| 3828 | } |
| 3829 | } |
| 3830 | |
| 3831 | /* Construct an erratum 843419 workaround stub name. */ |
| 3832 | |
| 3833 | static char * |
| 3834 | _bfd_aarch64_erratum_843419_stub_name (asection *input_section, |
| 3835 | bfd_vma offset) |
| 3836 | { |
| 3837 | const bfd_size_type len = 8 + 4 + 1 + 8 + 1 + 16 + 1; |
| 3838 | char *stub_name = bfd_malloc (len); |
| 3839 | |
| 3840 | if (stub_name != NULL) |
| 3841 | snprintf (stub_name, len, "e843419@%04x_%08x_%" BFD_VMA_FMT "x", |
| 3842 | input_section->owner->id, |
| 3843 | input_section->id, |
| 3844 | offset); |
| 3845 | return stub_name; |
| 3846 | } |
| 3847 | |
| 3848 | /* Build a stub_entry structure describing an 843419 fixup. |
| 3849 | |
| 3850 | The stub_entry constructed is populated with the bit pattern INSN |
| 3851 | of the instruction located at OFFSET within input SECTION. |
| 3852 | |
| 3853 | Returns TRUE on success. */ |
| 3854 | |
| 3855 | static bfd_boolean |
| 3856 | _bfd_aarch64_erratum_843419_fixup (uint32_t insn, |
| 3857 | bfd_vma adrp_offset, |
| 3858 | bfd_vma ldst_offset, |
| 3859 | asection *section, |
| 3860 | struct bfd_link_info *info) |
| 3861 | { |
| 3862 | struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info); |
| 3863 | char *stub_name; |
| 3864 | struct elf_aarch64_stub_hash_entry *stub_entry; |
| 3865 | |
| 3866 | stub_name = _bfd_aarch64_erratum_843419_stub_name (section, ldst_offset); |
| 3867 | stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table, stub_name, |
| 3868 | FALSE, FALSE); |
| 3869 | if (stub_entry) |
| 3870 | { |
| 3871 | free (stub_name); |
| 3872 | return TRUE; |
| 3873 | } |
| 3874 | |
| 3875 | /* We always place an 843419 workaround veneer in the stub section |
| 3876 | attached to the input section in which an erratum sequence has |
| 3877 | been found. This ensures that later in the link process (in |
| 3878 | elfNN_aarch64_write_section) when we copy the veneered |
| 3879 | instruction from the input section into the stub section the |
| 3880 | copied instruction will have had any relocations applied to it. |
| 3881 | If we placed workaround veneers in any other stub section then we |
| 3882 | could not assume that all relocations have been processed on the |
| 3883 | corresponding input section at the point we output the stub |
| 3884 | section. |
| 3885 | */ |
| 3886 | |
| 3887 | stub_entry = _bfd_aarch64_add_stub_entry_after (stub_name, section, htab); |
| 3888 | if (stub_entry == NULL) |
| 3889 | { |
| 3890 | free (stub_name); |
| 3891 | return FALSE; |
| 3892 | } |
| 3893 | |
| 3894 | stub_entry->adrp_offset = adrp_offset; |
| 3895 | stub_entry->target_value = ldst_offset; |
| 3896 | stub_entry->target_section = section; |
| 3897 | stub_entry->stub_type = aarch64_stub_erratum_843419_veneer; |
| 3898 | stub_entry->veneered_insn = insn; |
| 3899 | stub_entry->output_name = stub_name; |
| 3900 | |
| 3901 | return TRUE; |
| 3902 | } |
| 3903 | |
| 3904 | |
| 3905 | /* Scan an input section looking for the signature of erratum 843419. |
| 3906 | |
| 3907 | Scans input SECTION in INPUT_BFD looking for erratum 843419 |
| 3908 | signatures, for each signature found a stub_entry is created |
| 3909 | describing the location of the erratum for subsequent fixup. |
| 3910 | |
| 3911 | Return TRUE on successful scan, FALSE on failure to scan. |
| 3912 | */ |
| 3913 | |
| 3914 | static bfd_boolean |
| 3915 | _bfd_aarch64_erratum_843419_scan (bfd *input_bfd, asection *section, |
| 3916 | struct bfd_link_info *info) |
| 3917 | { |
| 3918 | struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info); |
| 3919 | |
| 3920 | if (htab == NULL) |
| 3921 | return TRUE; |
| 3922 | |
| 3923 | if (elf_section_type (section) != SHT_PROGBITS |
| 3924 | || (elf_section_flags (section) & SHF_EXECINSTR) == 0 |
| 3925 | || (section->flags & SEC_EXCLUDE) != 0 |
| 3926 | || (section->sec_info_type == SEC_INFO_TYPE_JUST_SYMS) |
| 3927 | || (section->output_section == bfd_abs_section_ptr)) |
| 3928 | return TRUE; |
| 3929 | |
| 3930 | do |
| 3931 | { |
| 3932 | bfd_byte *contents = NULL; |
| 3933 | struct _aarch64_elf_section_data *sec_data; |
| 3934 | unsigned int span; |
| 3935 | |
| 3936 | if (elf_section_data (section)->this_hdr.contents != NULL) |
| 3937 | contents = elf_section_data (section)->this_hdr.contents; |
| 3938 | else if (! bfd_malloc_and_get_section (input_bfd, section, &contents)) |
| 3939 | return FALSE; |
| 3940 | |
| 3941 | sec_data = elf_aarch64_section_data (section); |
| 3942 | |
| 3943 | qsort (sec_data->map, sec_data->mapcount, |
| 3944 | sizeof (elf_aarch64_section_map), elf_aarch64_compare_mapping); |
| 3945 | |
| 3946 | for (span = 0; span < sec_data->mapcount; span++) |
| 3947 | { |
| 3948 | unsigned int span_start = sec_data->map[span].vma; |
| 3949 | unsigned int span_end = ((span == sec_data->mapcount - 1) |
| 3950 | ? sec_data->map[0].vma + section->size |
| 3951 | : sec_data->map[span + 1].vma); |
| 3952 | unsigned int i; |
| 3953 | char span_type = sec_data->map[span].type; |
| 3954 | |
| 3955 | if (span_type == 'd') |
| 3956 | continue; |
| 3957 | |
| 3958 | for (i = span_start; i + 8 < span_end; i += 4) |
| 3959 | { |
| 3960 | bfd_vma vma = (section->output_section->vma |
| 3961 | + section->output_offset |
| 3962 | + i); |
| 3963 | bfd_vma veneer_i; |
| 3964 | |
| 3965 | if (_bfd_aarch64_erratum_843419_p |
| 3966 | (contents, vma, i, span_end, &veneer_i)) |
| 3967 | { |
| 3968 | uint32_t insn = bfd_getl32 (contents + veneer_i); |
| 3969 | |
| 3970 | if (!_bfd_aarch64_erratum_843419_fixup (insn, i, veneer_i, |
| 3971 | section, info)) |
| 3972 | return FALSE; |
| 3973 | } |
| 3974 | } |
| 3975 | } |
| 3976 | |
| 3977 | if (elf_section_data (section)->this_hdr.contents == NULL) |
| 3978 | free (contents); |
| 3979 | } |
| 3980 | while (0); |
| 3981 | |
| 3982 | return TRUE; |
| 3983 | } |
| 3984 | |
| 3985 | |
| 3986 | /* Determine and set the size of the stub section for a final link. |
| 3987 | |
| 3988 | The basic idea here is to examine all the relocations looking for |
| 3989 | PC-relative calls to a target that is unreachable with a "bl" |
| 3990 | instruction. */ |
| 3991 | |
| 3992 | bfd_boolean |
| 3993 | elfNN_aarch64_size_stubs (bfd *output_bfd, |
| 3994 | bfd *stub_bfd, |
| 3995 | struct bfd_link_info *info, |
| 3996 | bfd_signed_vma group_size, |
| 3997 | asection * (*add_stub_section) (const char *, |
| 3998 | asection *), |
| 3999 | void (*layout_sections_again) (void)) |
| 4000 | { |
| 4001 | bfd_size_type stub_group_size; |
| 4002 | bfd_boolean stubs_always_before_branch; |
| 4003 | bfd_boolean stub_changed = FALSE; |
| 4004 | struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info); |
| 4005 | unsigned int num_erratum_835769_fixes = 0; |
| 4006 | |
| 4007 | /* Propagate mach to stub bfd, because it may not have been |
| 4008 | finalized when we created stub_bfd. */ |
| 4009 | bfd_set_arch_mach (stub_bfd, bfd_get_arch (output_bfd), |
| 4010 | bfd_get_mach (output_bfd)); |
| 4011 | |
| 4012 | /* Stash our params away. */ |
| 4013 | htab->stub_bfd = stub_bfd; |
| 4014 | htab->add_stub_section = add_stub_section; |
| 4015 | htab->layout_sections_again = layout_sections_again; |
| 4016 | stubs_always_before_branch = group_size < 0; |
| 4017 | if (group_size < 0) |
| 4018 | stub_group_size = -group_size; |
| 4019 | else |
| 4020 | stub_group_size = group_size; |
| 4021 | |
| 4022 | if (stub_group_size == 1) |
| 4023 | { |
| 4024 | /* Default values. */ |
| 4025 | /* AArch64 branch range is +-128MB. The value used is 1MB less. */ |
| 4026 | stub_group_size = 127 * 1024 * 1024; |
| 4027 | } |
| 4028 | |
| 4029 | group_sections (htab, stub_group_size, stubs_always_before_branch); |
| 4030 | |
| 4031 | (*htab->layout_sections_again) (); |
| 4032 | |
| 4033 | if (htab->fix_erratum_835769) |
| 4034 | { |
| 4035 | bfd *input_bfd; |
| 4036 | |
| 4037 | for (input_bfd = info->input_bfds; |
| 4038 | input_bfd != NULL; input_bfd = input_bfd->link.next) |
| 4039 | if (!_bfd_aarch64_erratum_835769_scan (input_bfd, info, |
| 4040 | &num_erratum_835769_fixes)) |
| 4041 | return FALSE; |
| 4042 | |
| 4043 | _bfd_aarch64_resize_stubs (htab); |
| 4044 | (*htab->layout_sections_again) (); |
| 4045 | } |
| 4046 | |
| 4047 | if (htab->fix_erratum_843419) |
| 4048 | { |
| 4049 | bfd *input_bfd; |
| 4050 | |
| 4051 | for (input_bfd = info->input_bfds; |
| 4052 | input_bfd != NULL; |
| 4053 | input_bfd = input_bfd->link.next) |
| 4054 | { |
| 4055 | asection *section; |
| 4056 | |
| 4057 | for (section = input_bfd->sections; |
| 4058 | section != NULL; |
| 4059 | section = section->next) |
| 4060 | if (!_bfd_aarch64_erratum_843419_scan (input_bfd, section, info)) |
| 4061 | return FALSE; |
| 4062 | } |
| 4063 | |
| 4064 | _bfd_aarch64_resize_stubs (htab); |
| 4065 | (*htab->layout_sections_again) (); |
| 4066 | } |
| 4067 | |
| 4068 | while (1) |
| 4069 | { |
| 4070 | bfd *input_bfd; |
| 4071 | |
| 4072 | for (input_bfd = info->input_bfds; |
| 4073 | input_bfd != NULL; input_bfd = input_bfd->link.next) |
| 4074 | { |
| 4075 | Elf_Internal_Shdr *symtab_hdr; |
| 4076 | asection *section; |
| 4077 | Elf_Internal_Sym *local_syms = NULL; |
| 4078 | |
| 4079 | /* We'll need the symbol table in a second. */ |
| 4080 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 4081 | if (symtab_hdr->sh_info == 0) |
| 4082 | continue; |
| 4083 | |
| 4084 | /* Walk over each section attached to the input bfd. */ |
| 4085 | for (section = input_bfd->sections; |
| 4086 | section != NULL; section = section->next) |
| 4087 | { |
| 4088 | Elf_Internal_Rela *internal_relocs, *irelaend, *irela; |
| 4089 | |
| 4090 | /* If there aren't any relocs, then there's nothing more |
| 4091 | to do. */ |
| 4092 | if ((section->flags & SEC_RELOC) == 0 |
| 4093 | || section->reloc_count == 0 |
| 4094 | || (section->flags & SEC_CODE) == 0) |
| 4095 | continue; |
| 4096 | |
| 4097 | /* If this section is a link-once section that will be |
| 4098 | discarded, then don't create any stubs. */ |
| 4099 | if (section->output_section == NULL |
| 4100 | || section->output_section->owner != output_bfd) |
| 4101 | continue; |
| 4102 | |
| 4103 | /* Get the relocs. */ |
| 4104 | internal_relocs |
| 4105 | = _bfd_elf_link_read_relocs (input_bfd, section, NULL, |
| 4106 | NULL, info->keep_memory); |
| 4107 | if (internal_relocs == NULL) |
| 4108 | goto error_ret_free_local; |
| 4109 | |
| 4110 | /* Now examine each relocation. */ |
| 4111 | irela = internal_relocs; |
| 4112 | irelaend = irela + section->reloc_count; |
| 4113 | for (; irela < irelaend; irela++) |
| 4114 | { |
| 4115 | unsigned int r_type, r_indx; |
| 4116 | enum elf_aarch64_stub_type stub_type; |
| 4117 | struct elf_aarch64_stub_hash_entry *stub_entry; |
| 4118 | asection *sym_sec; |
| 4119 | bfd_vma sym_value; |
| 4120 | bfd_vma destination; |
| 4121 | struct elf_aarch64_link_hash_entry *hash; |
| 4122 | const char *sym_name; |
| 4123 | char *stub_name; |
| 4124 | const asection *id_sec; |
| 4125 | unsigned char st_type; |
| 4126 | bfd_size_type len; |
| 4127 | |
| 4128 | r_type = ELFNN_R_TYPE (irela->r_info); |
| 4129 | r_indx = ELFNN_R_SYM (irela->r_info); |
| 4130 | |
| 4131 | if (r_type >= (unsigned int) R_AARCH64_end) |
| 4132 | { |
| 4133 | bfd_set_error (bfd_error_bad_value); |
| 4134 | error_ret_free_internal: |
| 4135 | if (elf_section_data (section)->relocs == NULL) |
| 4136 | free (internal_relocs); |
| 4137 | goto error_ret_free_local; |
| 4138 | } |
| 4139 | |
| 4140 | /* Only look for stubs on unconditional branch and |
| 4141 | branch and link instructions. */ |
| 4142 | if (r_type != (unsigned int) AARCH64_R (CALL26) |
| 4143 | && r_type != (unsigned int) AARCH64_R (JUMP26)) |
| 4144 | continue; |
| 4145 | |
| 4146 | /* Now determine the call target, its name, value, |
| 4147 | section. */ |
| 4148 | sym_sec = NULL; |
| 4149 | sym_value = 0; |
| 4150 | destination = 0; |
| 4151 | hash = NULL; |
| 4152 | sym_name = NULL; |
| 4153 | if (r_indx < symtab_hdr->sh_info) |
| 4154 | { |
| 4155 | /* It's a local symbol. */ |
| 4156 | Elf_Internal_Sym *sym; |
| 4157 | Elf_Internal_Shdr *hdr; |
| 4158 | |
| 4159 | if (local_syms == NULL) |
| 4160 | { |
| 4161 | local_syms |
| 4162 | = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 4163 | if (local_syms == NULL) |
| 4164 | local_syms |
| 4165 | = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, |
| 4166 | symtab_hdr->sh_info, 0, |
| 4167 | NULL, NULL, NULL); |
| 4168 | if (local_syms == NULL) |
| 4169 | goto error_ret_free_internal; |
| 4170 | } |
| 4171 | |
| 4172 | sym = local_syms + r_indx; |
| 4173 | hdr = elf_elfsections (input_bfd)[sym->st_shndx]; |
| 4174 | sym_sec = hdr->bfd_section; |
| 4175 | if (!sym_sec) |
| 4176 | /* This is an undefined symbol. It can never |
| 4177 | be resolved. */ |
| 4178 | continue; |
| 4179 | |
| 4180 | if (ELF_ST_TYPE (sym->st_info) != STT_SECTION) |
| 4181 | sym_value = sym->st_value; |
| 4182 | destination = (sym_value + irela->r_addend |
| 4183 | + sym_sec->output_offset |
| 4184 | + sym_sec->output_section->vma); |
| 4185 | st_type = ELF_ST_TYPE (sym->st_info); |
| 4186 | sym_name |
| 4187 | = bfd_elf_string_from_elf_section (input_bfd, |
| 4188 | symtab_hdr->sh_link, |
| 4189 | sym->st_name); |
| 4190 | } |
| 4191 | else |
| 4192 | { |
| 4193 | int e_indx; |
| 4194 | |
| 4195 | e_indx = r_indx - symtab_hdr->sh_info; |
| 4196 | hash = ((struct elf_aarch64_link_hash_entry *) |
| 4197 | elf_sym_hashes (input_bfd)[e_indx]); |
| 4198 | |
| 4199 | while (hash->root.root.type == bfd_link_hash_indirect |
| 4200 | || hash->root.root.type == bfd_link_hash_warning) |
| 4201 | hash = ((struct elf_aarch64_link_hash_entry *) |
| 4202 | hash->root.root.u.i.link); |
| 4203 | |
| 4204 | if (hash->root.root.type == bfd_link_hash_defined |
| 4205 | || hash->root.root.type == bfd_link_hash_defweak) |
| 4206 | { |
| 4207 | struct elf_aarch64_link_hash_table *globals = |
| 4208 | elf_aarch64_hash_table (info); |
| 4209 | sym_sec = hash->root.root.u.def.section; |
| 4210 | sym_value = hash->root.root.u.def.value; |
| 4211 | /* For a destination in a shared library, |
| 4212 | use the PLT stub as target address to |
| 4213 | decide whether a branch stub is |
| 4214 | needed. */ |
| 4215 | if (globals->root.splt != NULL && hash != NULL |
| 4216 | && hash->root.plt.offset != (bfd_vma) - 1) |
| 4217 | { |
| 4218 | sym_sec = globals->root.splt; |
| 4219 | sym_value = hash->root.plt.offset; |
| 4220 | if (sym_sec->output_section != NULL) |
| 4221 | destination = (sym_value |
| 4222 | + sym_sec->output_offset |
| 4223 | + |
| 4224 | sym_sec->output_section->vma); |
| 4225 | } |
| 4226 | else if (sym_sec->output_section != NULL) |
| 4227 | destination = (sym_value + irela->r_addend |
| 4228 | + sym_sec->output_offset |
| 4229 | + sym_sec->output_section->vma); |
| 4230 | } |
| 4231 | else if (hash->root.root.type == bfd_link_hash_undefined |
| 4232 | || (hash->root.root.type |
| 4233 | == bfd_link_hash_undefweak)) |
| 4234 | { |
| 4235 | /* For a shared library, use the PLT stub as |
| 4236 | target address to decide whether a long |
| 4237 | branch stub is needed. |
| 4238 | For absolute code, they cannot be handled. */ |
| 4239 | struct elf_aarch64_link_hash_table *globals = |
| 4240 | elf_aarch64_hash_table (info); |
| 4241 | |
| 4242 | if (globals->root.splt != NULL && hash != NULL |
| 4243 | && hash->root.plt.offset != (bfd_vma) - 1) |
| 4244 | { |
| 4245 | sym_sec = globals->root.splt; |
| 4246 | sym_value = hash->root.plt.offset; |
| 4247 | if (sym_sec->output_section != NULL) |
| 4248 | destination = (sym_value |
| 4249 | + sym_sec->output_offset |
| 4250 | + |
| 4251 | sym_sec->output_section->vma); |
| 4252 | } |
| 4253 | else |
| 4254 | continue; |
| 4255 | } |
| 4256 | else |
| 4257 | { |
| 4258 | bfd_set_error (bfd_error_bad_value); |
| 4259 | goto error_ret_free_internal; |
| 4260 | } |
| 4261 | st_type = ELF_ST_TYPE (hash->root.type); |
| 4262 | sym_name = hash->root.root.root.string; |
| 4263 | } |
| 4264 | |
| 4265 | /* Determine what (if any) linker stub is needed. */ |
| 4266 | stub_type = aarch64_type_of_stub (section, irela, sym_sec, |
| 4267 | st_type, destination); |
| 4268 | if (stub_type == aarch64_stub_none) |
| 4269 | continue; |
| 4270 | |
| 4271 | /* Support for grouping stub sections. */ |
| 4272 | id_sec = htab->stub_group[section->id].link_sec; |
| 4273 | |
| 4274 | /* Get the name of this stub. */ |
| 4275 | stub_name = elfNN_aarch64_stub_name (id_sec, sym_sec, hash, |
| 4276 | irela); |
| 4277 | if (!stub_name) |
| 4278 | goto error_ret_free_internal; |
| 4279 | |
| 4280 | stub_entry = |
| 4281 | aarch64_stub_hash_lookup (&htab->stub_hash_table, |
| 4282 | stub_name, FALSE, FALSE); |
| 4283 | if (stub_entry != NULL) |
| 4284 | { |
| 4285 | /* The proper stub has already been created. */ |
| 4286 | free (stub_name); |
| 4287 | continue; |
| 4288 | } |
| 4289 | |
| 4290 | stub_entry = _bfd_aarch64_add_stub_entry_in_group |
| 4291 | (stub_name, section, htab); |
| 4292 | if (stub_entry == NULL) |
| 4293 | { |
| 4294 | free (stub_name); |
| 4295 | goto error_ret_free_internal; |
| 4296 | } |
| 4297 | |
| 4298 | stub_entry->target_value = sym_value + irela->r_addend; |
| 4299 | stub_entry->target_section = sym_sec; |
| 4300 | stub_entry->stub_type = stub_type; |
| 4301 | stub_entry->h = hash; |
| 4302 | stub_entry->st_type = st_type; |
| 4303 | |
| 4304 | if (sym_name == NULL) |
| 4305 | sym_name = "unnamed"; |
| 4306 | len = sizeof (STUB_ENTRY_NAME) + strlen (sym_name); |
| 4307 | stub_entry->output_name = bfd_alloc (htab->stub_bfd, len); |
| 4308 | if (stub_entry->output_name == NULL) |
| 4309 | { |
| 4310 | free (stub_name); |
| 4311 | goto error_ret_free_internal; |
| 4312 | } |
| 4313 | |
| 4314 | snprintf (stub_entry->output_name, len, STUB_ENTRY_NAME, |
| 4315 | sym_name); |
| 4316 | |
| 4317 | stub_changed = TRUE; |
| 4318 | } |
| 4319 | |
| 4320 | /* We're done with the internal relocs, free them. */ |
| 4321 | if (elf_section_data (section)->relocs == NULL) |
| 4322 | free (internal_relocs); |
| 4323 | } |
| 4324 | } |
| 4325 | |
| 4326 | if (!stub_changed) |
| 4327 | break; |
| 4328 | |
| 4329 | _bfd_aarch64_resize_stubs (htab); |
| 4330 | |
| 4331 | /* Ask the linker to do its stuff. */ |
| 4332 | (*htab->layout_sections_again) (); |
| 4333 | stub_changed = FALSE; |
| 4334 | } |
| 4335 | |
| 4336 | return TRUE; |
| 4337 | |
| 4338 | error_ret_free_local: |
| 4339 | return FALSE; |
| 4340 | } |
| 4341 | |
| 4342 | /* Build all the stubs associated with the current output file. The |
| 4343 | stubs are kept in a hash table attached to the main linker hash |
| 4344 | table. We also set up the .plt entries for statically linked PIC |
| 4345 | functions here. This function is called via aarch64_elf_finish in the |
| 4346 | linker. */ |
| 4347 | |
| 4348 | bfd_boolean |
| 4349 | elfNN_aarch64_build_stubs (struct bfd_link_info *info) |
| 4350 | { |
| 4351 | asection *stub_sec; |
| 4352 | struct bfd_hash_table *table; |
| 4353 | struct elf_aarch64_link_hash_table *htab; |
| 4354 | |
| 4355 | htab = elf_aarch64_hash_table (info); |
| 4356 | |
| 4357 | for (stub_sec = htab->stub_bfd->sections; |
| 4358 | stub_sec != NULL; stub_sec = stub_sec->next) |
| 4359 | { |
| 4360 | bfd_size_type size; |
| 4361 | |
| 4362 | /* Ignore non-stub sections. */ |
| 4363 | if (!strstr (stub_sec->name, STUB_SUFFIX)) |
| 4364 | continue; |
| 4365 | |
| 4366 | /* Allocate memory to hold the linker stubs. */ |
| 4367 | size = stub_sec->size; |
| 4368 | stub_sec->contents = bfd_zalloc (htab->stub_bfd, size); |
| 4369 | if (stub_sec->contents == NULL && size != 0) |
| 4370 | return FALSE; |
| 4371 | stub_sec->size = 0; |
| 4372 | |
| 4373 | /* Add a branch around the stub section, and a nop, to keep it 8 byte |
| 4374 | aligned, as long branch stubs contain a 64-bit address. */ |
| 4375 | bfd_putl32 (0x14000000 | (size >> 2), stub_sec->contents); |
| 4376 | bfd_putl32 (INSN_NOP, stub_sec->contents + 4); |
| 4377 | stub_sec->size += 8; |
| 4378 | } |
| 4379 | |
| 4380 | /* Build the stubs as directed by the stub hash table. */ |
| 4381 | table = &htab->stub_hash_table; |
| 4382 | bfd_hash_traverse (table, aarch64_build_one_stub, info); |
| 4383 | |
| 4384 | return TRUE; |
| 4385 | } |
| 4386 | |
| 4387 | |
| 4388 | /* Add an entry to the code/data map for section SEC. */ |
| 4389 | |
| 4390 | static void |
| 4391 | elfNN_aarch64_section_map_add (asection *sec, char type, bfd_vma vma) |
| 4392 | { |
| 4393 | struct _aarch64_elf_section_data *sec_data = |
| 4394 | elf_aarch64_section_data (sec); |
| 4395 | unsigned int newidx; |
| 4396 | |
| 4397 | if (sec_data->map == NULL) |
| 4398 | { |
| 4399 | sec_data->map = bfd_malloc (sizeof (elf_aarch64_section_map)); |
| 4400 | sec_data->mapcount = 0; |
| 4401 | sec_data->mapsize = 1; |
| 4402 | } |
| 4403 | |
| 4404 | newidx = sec_data->mapcount++; |
| 4405 | |
| 4406 | if (sec_data->mapcount > sec_data->mapsize) |
| 4407 | { |
| 4408 | sec_data->mapsize *= 2; |
| 4409 | sec_data->map = bfd_realloc_or_free |
| 4410 | (sec_data->map, sec_data->mapsize * sizeof (elf_aarch64_section_map)); |
| 4411 | } |
| 4412 | |
| 4413 | if (sec_data->map) |
| 4414 | { |
| 4415 | sec_data->map[newidx].vma = vma; |
| 4416 | sec_data->map[newidx].type = type; |
| 4417 | } |
| 4418 | } |
| 4419 | |
| 4420 | |
| 4421 | /* Initialise maps of insn/data for input BFDs. */ |
| 4422 | void |
| 4423 | bfd_elfNN_aarch64_init_maps (bfd *abfd) |
| 4424 | { |
| 4425 | Elf_Internal_Sym *isymbuf; |
| 4426 | Elf_Internal_Shdr *hdr; |
| 4427 | unsigned int i, localsyms; |
| 4428 | |
| 4429 | /* Make sure that we are dealing with an AArch64 elf binary. */ |
| 4430 | if (!is_aarch64_elf (abfd)) |
| 4431 | return; |
| 4432 | |
| 4433 | if ((abfd->flags & DYNAMIC) != 0) |
| 4434 | return; |
| 4435 | |
| 4436 | hdr = &elf_symtab_hdr (abfd); |
| 4437 | localsyms = hdr->sh_info; |
| 4438 | |
| 4439 | /* Obtain a buffer full of symbols for this BFD. The hdr->sh_info field |
| 4440 | should contain the number of local symbols, which should come before any |
| 4441 | global symbols. Mapping symbols are always local. */ |
| 4442 | isymbuf = bfd_elf_get_elf_syms (abfd, hdr, localsyms, 0, NULL, NULL, NULL); |
| 4443 | |
| 4444 | /* No internal symbols read? Skip this BFD. */ |
| 4445 | if (isymbuf == NULL) |
| 4446 | return; |
| 4447 | |
| 4448 | for (i = 0; i < localsyms; i++) |
| 4449 | { |
| 4450 | Elf_Internal_Sym *isym = &isymbuf[i]; |
| 4451 | asection *sec = bfd_section_from_elf_index (abfd, isym->st_shndx); |
| 4452 | const char *name; |
| 4453 | |
| 4454 | if (sec != NULL && ELF_ST_BIND (isym->st_info) == STB_LOCAL) |
| 4455 | { |
| 4456 | name = bfd_elf_string_from_elf_section (abfd, |
| 4457 | hdr->sh_link, |
| 4458 | isym->st_name); |
| 4459 | |
| 4460 | if (bfd_is_aarch64_special_symbol_name |
| 4461 | (name, BFD_AARCH64_SPECIAL_SYM_TYPE_MAP)) |
| 4462 | elfNN_aarch64_section_map_add (sec, name[1], isym->st_value); |
| 4463 | } |
| 4464 | } |
| 4465 | } |
| 4466 | |
| 4467 | /* Set option values needed during linking. */ |
| 4468 | void |
| 4469 | bfd_elfNN_aarch64_set_options (struct bfd *output_bfd, |
| 4470 | struct bfd_link_info *link_info, |
| 4471 | int no_enum_warn, |
| 4472 | int no_wchar_warn, int pic_veneer, |
| 4473 | int fix_erratum_835769, |
| 4474 | int fix_erratum_843419, |
| 4475 | int no_apply_dynamic_relocs) |
| 4476 | { |
| 4477 | struct elf_aarch64_link_hash_table *globals; |
| 4478 | |
| 4479 | globals = elf_aarch64_hash_table (link_info); |
| 4480 | globals->pic_veneer = pic_veneer; |
| 4481 | globals->fix_erratum_835769 = fix_erratum_835769; |
| 4482 | globals->fix_erratum_843419 = fix_erratum_843419; |
| 4483 | globals->fix_erratum_843419_adr = TRUE; |
| 4484 | globals->no_apply_dynamic_relocs = no_apply_dynamic_relocs; |
| 4485 | |
| 4486 | BFD_ASSERT (is_aarch64_elf (output_bfd)); |
| 4487 | elf_aarch64_tdata (output_bfd)->no_enum_size_warning = no_enum_warn; |
| 4488 | elf_aarch64_tdata (output_bfd)->no_wchar_size_warning = no_wchar_warn; |
| 4489 | } |
| 4490 | |
| 4491 | static bfd_vma |
| 4492 | aarch64_calculate_got_entry_vma (struct elf_link_hash_entry *h, |
| 4493 | struct elf_aarch64_link_hash_table |
| 4494 | *globals, struct bfd_link_info *info, |
| 4495 | bfd_vma value, bfd *output_bfd, |
| 4496 | bfd_boolean *unresolved_reloc_p) |
| 4497 | { |
| 4498 | bfd_vma off = (bfd_vma) - 1; |
| 4499 | asection *basegot = globals->root.sgot; |
| 4500 | bfd_boolean dyn = globals->root.dynamic_sections_created; |
| 4501 | |
| 4502 | if (h != NULL) |
| 4503 | { |
| 4504 | BFD_ASSERT (basegot != NULL); |
| 4505 | off = h->got.offset; |
| 4506 | BFD_ASSERT (off != (bfd_vma) - 1); |
| 4507 | if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h) |
| 4508 | || (bfd_link_pic (info) |
| 4509 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
| 4510 | || (ELF_ST_VISIBILITY (h->other) |
| 4511 | && h->root.type == bfd_link_hash_undefweak)) |
| 4512 | { |
| 4513 | /* This is actually a static link, or it is a -Bsymbolic link |
| 4514 | and the symbol is defined locally. We must initialize this |
| 4515 | entry in the global offset table. Since the offset must |
| 4516 | always be a multiple of 8 (4 in the case of ILP32), we use |
| 4517 | the least significant bit to record whether we have |
| 4518 | initialized it already. |
| 4519 | When doing a dynamic link, we create a .rel(a).got relocation |
| 4520 | entry to initialize the value. This is done in the |
| 4521 | finish_dynamic_symbol routine. */ |
| 4522 | if ((off & 1) != 0) |
| 4523 | off &= ~1; |
| 4524 | else |
| 4525 | { |
| 4526 | bfd_put_NN (output_bfd, value, basegot->contents + off); |
| 4527 | h->got.offset |= 1; |
| 4528 | } |
| 4529 | } |
| 4530 | else |
| 4531 | *unresolved_reloc_p = FALSE; |
| 4532 | |
| 4533 | off = off + basegot->output_section->vma + basegot->output_offset; |
| 4534 | } |
| 4535 | |
| 4536 | return off; |
| 4537 | } |
| 4538 | |
| 4539 | /* Change R_TYPE to a more efficient access model where possible, |
| 4540 | return the new reloc type. */ |
| 4541 | |
| 4542 | static bfd_reloc_code_real_type |
| 4543 | aarch64_tls_transition_without_check (bfd_reloc_code_real_type r_type, |
| 4544 | struct elf_link_hash_entry *h) |
| 4545 | { |
| 4546 | bfd_boolean is_local = h == NULL; |
| 4547 | |
| 4548 | switch (r_type) |
| 4549 | { |
| 4550 | case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21: |
| 4551 | case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21: |
| 4552 | return (is_local |
| 4553 | ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1 |
| 4554 | : BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21); |
| 4555 | |
| 4556 | case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21: |
| 4557 | return (is_local |
| 4558 | ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC |
| 4559 | : r_type); |
| 4560 | |
| 4561 | case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19: |
| 4562 | return (is_local |
| 4563 | ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1 |
| 4564 | : BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19); |
| 4565 | |
| 4566 | case BFD_RELOC_AARCH64_TLSDESC_LDR: |
| 4567 | return (is_local |
| 4568 | ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC |
| 4569 | : BFD_RELOC_AARCH64_NONE); |
| 4570 | |
| 4571 | case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC: |
| 4572 | return (is_local |
| 4573 | ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC |
| 4574 | : BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC); |
| 4575 | |
| 4576 | case BFD_RELOC_AARCH64_TLSDESC_OFF_G1: |
| 4577 | return (is_local |
| 4578 | ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2 |
| 4579 | : BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1); |
| 4580 | |
| 4581 | case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC: |
| 4582 | case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC: |
| 4583 | return (is_local |
| 4584 | ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC |
| 4585 | : BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC); |
| 4586 | |
| 4587 | case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: |
| 4588 | return is_local ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1 : r_type; |
| 4589 | |
| 4590 | case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC: |
| 4591 | return is_local ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC : r_type; |
| 4592 | |
| 4593 | case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19: |
| 4594 | return r_type; |
| 4595 | |
| 4596 | case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21: |
| 4597 | return (is_local |
| 4598 | ? BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12 |
| 4599 | : BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19); |
| 4600 | |
| 4601 | case BFD_RELOC_AARCH64_TLSDESC_ADD: |
| 4602 | case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12: |
| 4603 | case BFD_RELOC_AARCH64_TLSDESC_CALL: |
| 4604 | /* Instructions with these relocations will become NOPs. */ |
| 4605 | return BFD_RELOC_AARCH64_NONE; |
| 4606 | |
| 4607 | case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC: |
| 4608 | case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21: |
| 4609 | case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21: |
| 4610 | return is_local ? BFD_RELOC_AARCH64_NONE : r_type; |
| 4611 | |
| 4612 | #if ARCH_SIZE == 64 |
| 4613 | case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC: |
| 4614 | return is_local |
| 4615 | ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC |
| 4616 | : BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC; |
| 4617 | |
| 4618 | case BFD_RELOC_AARCH64_TLSGD_MOVW_G1: |
| 4619 | return is_local |
| 4620 | ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2 |
| 4621 | : BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1; |
| 4622 | #endif |
| 4623 | |
| 4624 | default: |
| 4625 | break; |
| 4626 | } |
| 4627 | |
| 4628 | return r_type; |
| 4629 | } |
| 4630 | |
| 4631 | static unsigned int |
| 4632 | aarch64_reloc_got_type (bfd_reloc_code_real_type r_type) |
| 4633 | { |
| 4634 | switch (r_type) |
| 4635 | { |
| 4636 | case BFD_RELOC_AARCH64_ADR_GOT_PAGE: |
| 4637 | case BFD_RELOC_AARCH64_GOT_LD_PREL19: |
| 4638 | case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14: |
| 4639 | case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC: |
| 4640 | case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15: |
| 4641 | case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15: |
| 4642 | case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC: |
| 4643 | case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC: |
| 4644 | case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1: |
| 4645 | return GOT_NORMAL; |
| 4646 | |
| 4647 | case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC: |
| 4648 | case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21: |
| 4649 | case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21: |
| 4650 | case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC: |
| 4651 | case BFD_RELOC_AARCH64_TLSGD_MOVW_G1: |
| 4652 | case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC: |
| 4653 | case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21: |
| 4654 | case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21: |
| 4655 | return GOT_TLS_GD; |
| 4656 | |
| 4657 | case BFD_RELOC_AARCH64_TLSDESC_ADD: |
| 4658 | case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12: |
| 4659 | case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21: |
| 4660 | case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21: |
| 4661 | case BFD_RELOC_AARCH64_TLSDESC_CALL: |
| 4662 | case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC: |
| 4663 | case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12: |
| 4664 | case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19: |
| 4665 | case BFD_RELOC_AARCH64_TLSDESC_LDR: |
| 4666 | case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC: |
| 4667 | case BFD_RELOC_AARCH64_TLSDESC_OFF_G1: |
| 4668 | return GOT_TLSDESC_GD; |
| 4669 | |
| 4670 | case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: |
| 4671 | case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC: |
| 4672 | case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: |
| 4673 | case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19: |
| 4674 | case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC: |
| 4675 | case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1: |
| 4676 | return GOT_TLS_IE; |
| 4677 | |
| 4678 | default: |
| 4679 | break; |
| 4680 | } |
| 4681 | return GOT_UNKNOWN; |
| 4682 | } |
| 4683 | |
| 4684 | static bfd_boolean |
| 4685 | aarch64_can_relax_tls (bfd *input_bfd, |
| 4686 | struct bfd_link_info *info, |
| 4687 | bfd_reloc_code_real_type r_type, |
| 4688 | struct elf_link_hash_entry *h, |
| 4689 | unsigned long r_symndx) |
| 4690 | { |
| 4691 | unsigned int symbol_got_type; |
| 4692 | unsigned int reloc_got_type; |
| 4693 | |
| 4694 | if (! IS_AARCH64_TLS_RELAX_RELOC (r_type)) |
| 4695 | return FALSE; |
| 4696 | |
| 4697 | symbol_got_type = elfNN_aarch64_symbol_got_type (h, input_bfd, r_symndx); |
| 4698 | reloc_got_type = aarch64_reloc_got_type (r_type); |
| 4699 | |
| 4700 | if (symbol_got_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (reloc_got_type)) |
| 4701 | return TRUE; |
| 4702 | |
| 4703 | if (!bfd_link_executable (info)) |
| 4704 | return FALSE; |
| 4705 | |
| 4706 | if (h && h->root.type == bfd_link_hash_undefweak) |
| 4707 | return FALSE; |
| 4708 | |
| 4709 | return TRUE; |
| 4710 | } |
| 4711 | |
| 4712 | /* Given the relocation code R_TYPE, return the relaxed bfd reloc |
| 4713 | enumerator. */ |
| 4714 | |
| 4715 | static bfd_reloc_code_real_type |
| 4716 | aarch64_tls_transition (bfd *input_bfd, |
| 4717 | struct bfd_link_info *info, |
| 4718 | unsigned int r_type, |
| 4719 | struct elf_link_hash_entry *h, |
| 4720 | unsigned long r_symndx) |
| 4721 | { |
| 4722 | bfd_reloc_code_real_type bfd_r_type |
| 4723 | = elfNN_aarch64_bfd_reloc_from_type (input_bfd, r_type); |
| 4724 | |
| 4725 | if (! aarch64_can_relax_tls (input_bfd, info, bfd_r_type, h, r_symndx)) |
| 4726 | return bfd_r_type; |
| 4727 | |
| 4728 | return aarch64_tls_transition_without_check (bfd_r_type, h); |
| 4729 | } |
| 4730 | |
| 4731 | /* Return the base VMA address which should be subtracted from real addresses |
| 4732 | when resolving R_AARCH64_TLS_DTPREL relocation. */ |
| 4733 | |
| 4734 | static bfd_vma |
| 4735 | dtpoff_base (struct bfd_link_info *info) |
| 4736 | { |
| 4737 | /* If tls_sec is NULL, we should have signalled an error already. */ |
| 4738 | BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL); |
| 4739 | return elf_hash_table (info)->tls_sec->vma; |
| 4740 | } |
| 4741 | |
| 4742 | /* Return the base VMA address which should be subtracted from real addresses |
| 4743 | when resolving R_AARCH64_TLS_GOTTPREL64 relocations. */ |
| 4744 | |
| 4745 | static bfd_vma |
| 4746 | tpoff_base (struct bfd_link_info *info) |
| 4747 | { |
| 4748 | struct elf_link_hash_table *htab = elf_hash_table (info); |
| 4749 | |
| 4750 | /* If tls_sec is NULL, we should have signalled an error already. */ |
| 4751 | BFD_ASSERT (htab->tls_sec != NULL); |
| 4752 | |
| 4753 | bfd_vma base = align_power ((bfd_vma) TCB_SIZE, |
| 4754 | htab->tls_sec->alignment_power); |
| 4755 | return htab->tls_sec->vma - base; |
| 4756 | } |
| 4757 | |
| 4758 | static bfd_vma * |
| 4759 | symbol_got_offset_ref (bfd *input_bfd, struct elf_link_hash_entry *h, |
| 4760 | unsigned long r_symndx) |
| 4761 | { |
| 4762 | /* Calculate the address of the GOT entry for symbol |
| 4763 | referred to in h. */ |
| 4764 | if (h != NULL) |
| 4765 | return &h->got.offset; |
| 4766 | else |
| 4767 | { |
| 4768 | /* local symbol */ |
| 4769 | struct elf_aarch64_local_symbol *l; |
| 4770 | |
| 4771 | l = elf_aarch64_locals (input_bfd); |
| 4772 | return &l[r_symndx].got_offset; |
| 4773 | } |
| 4774 | } |
| 4775 | |
| 4776 | static void |
| 4777 | symbol_got_offset_mark (bfd *input_bfd, struct elf_link_hash_entry *h, |
| 4778 | unsigned long r_symndx) |
| 4779 | { |
| 4780 | bfd_vma *p; |
| 4781 | p = symbol_got_offset_ref (input_bfd, h, r_symndx); |
| 4782 | *p |= 1; |
| 4783 | } |
| 4784 | |
| 4785 | static int |
| 4786 | symbol_got_offset_mark_p (bfd *input_bfd, struct elf_link_hash_entry *h, |
| 4787 | unsigned long r_symndx) |
| 4788 | { |
| 4789 | bfd_vma value; |
| 4790 | value = * symbol_got_offset_ref (input_bfd, h, r_symndx); |
| 4791 | return value & 1; |
| 4792 | } |
| 4793 | |
| 4794 | static bfd_vma |
| 4795 | symbol_got_offset (bfd *input_bfd, struct elf_link_hash_entry *h, |
| 4796 | unsigned long r_symndx) |
| 4797 | { |
| 4798 | bfd_vma value; |
| 4799 | value = * symbol_got_offset_ref (input_bfd, h, r_symndx); |
| 4800 | value &= ~1; |
| 4801 | return value; |
| 4802 | } |
| 4803 | |
| 4804 | static bfd_vma * |
| 4805 | symbol_tlsdesc_got_offset_ref (bfd *input_bfd, struct elf_link_hash_entry *h, |
| 4806 | unsigned long r_symndx) |
| 4807 | { |
| 4808 | /* Calculate the address of the GOT entry for symbol |
| 4809 | referred to in h. */ |
| 4810 | if (h != NULL) |
| 4811 | { |
| 4812 | struct elf_aarch64_link_hash_entry *eh; |
| 4813 | eh = (struct elf_aarch64_link_hash_entry *) h; |
| 4814 | return &eh->tlsdesc_got_jump_table_offset; |
| 4815 | } |
| 4816 | else |
| 4817 | { |
| 4818 | /* local symbol */ |
| 4819 | struct elf_aarch64_local_symbol *l; |
| 4820 | |
| 4821 | l = elf_aarch64_locals (input_bfd); |
| 4822 | return &l[r_symndx].tlsdesc_got_jump_table_offset; |
| 4823 | } |
| 4824 | } |
| 4825 | |
| 4826 | static void |
| 4827 | symbol_tlsdesc_got_offset_mark (bfd *input_bfd, struct elf_link_hash_entry *h, |
| 4828 | unsigned long r_symndx) |
| 4829 | { |
| 4830 | bfd_vma *p; |
| 4831 | p = symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx); |
| 4832 | *p |= 1; |
| 4833 | } |
| 4834 | |
| 4835 | static int |
| 4836 | symbol_tlsdesc_got_offset_mark_p (bfd *input_bfd, |
| 4837 | struct elf_link_hash_entry *h, |
| 4838 | unsigned long r_symndx) |
| 4839 | { |
| 4840 | bfd_vma value; |
| 4841 | value = * symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx); |
| 4842 | return value & 1; |
| 4843 | } |
| 4844 | |
| 4845 | static bfd_vma |
| 4846 | symbol_tlsdesc_got_offset (bfd *input_bfd, struct elf_link_hash_entry *h, |
| 4847 | unsigned long r_symndx) |
| 4848 | { |
| 4849 | bfd_vma value; |
| 4850 | value = * symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx); |
| 4851 | value &= ~1; |
| 4852 | return value; |
| 4853 | } |
| 4854 | |
| 4855 | /* Data for make_branch_to_erratum_835769_stub(). */ |
| 4856 | |
| 4857 | struct erratum_835769_branch_to_stub_data |
| 4858 | { |
| 4859 | struct bfd_link_info *info; |
| 4860 | asection *output_section; |
| 4861 | bfd_byte *contents; |
| 4862 | }; |
| 4863 | |
| 4864 | /* Helper to insert branches to erratum 835769 stubs in the right |
| 4865 | places for a particular section. */ |
| 4866 | |
| 4867 | static bfd_boolean |
| 4868 | make_branch_to_erratum_835769_stub (struct bfd_hash_entry *gen_entry, |
| 4869 | void *in_arg) |
| 4870 | { |
| 4871 | struct elf_aarch64_stub_hash_entry *stub_entry; |
| 4872 | struct erratum_835769_branch_to_stub_data *data; |
| 4873 | bfd_byte *contents; |
| 4874 | unsigned long branch_insn = 0; |
| 4875 | bfd_vma veneered_insn_loc, veneer_entry_loc; |
| 4876 | bfd_signed_vma branch_offset; |
| 4877 | unsigned int target; |
| 4878 | bfd *abfd; |
| 4879 | |
| 4880 | stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry; |
| 4881 | data = (struct erratum_835769_branch_to_stub_data *) in_arg; |
| 4882 | |
| 4883 | if (stub_entry->target_section != data->output_section |
| 4884 | || stub_entry->stub_type != aarch64_stub_erratum_835769_veneer) |
| 4885 | return TRUE; |
| 4886 | |
| 4887 | contents = data->contents; |
| 4888 | veneered_insn_loc = stub_entry->target_section->output_section->vma |
| 4889 | + stub_entry->target_section->output_offset |
| 4890 | + stub_entry->target_value; |
| 4891 | veneer_entry_loc = stub_entry->stub_sec->output_section->vma |
| 4892 | + stub_entry->stub_sec->output_offset |
| 4893 | + stub_entry->stub_offset; |
| 4894 | branch_offset = veneer_entry_loc - veneered_insn_loc; |
| 4895 | |
| 4896 | abfd = stub_entry->target_section->owner; |
| 4897 | if (!aarch64_valid_branch_p (veneer_entry_loc, veneered_insn_loc)) |
| 4898 | _bfd_error_handler |
| 4899 | (_("%pB: error: erratum 835769 stub out " |
| 4900 | "of range (input file too large)"), abfd); |
| 4901 | |
| 4902 | target = stub_entry->target_value; |
| 4903 | branch_insn = 0x14000000; |
| 4904 | branch_offset >>= 2; |
| 4905 | branch_offset &= 0x3ffffff; |
| 4906 | branch_insn |= branch_offset; |
| 4907 | bfd_putl32 (branch_insn, &contents[target]); |
| 4908 | |
| 4909 | return TRUE; |
| 4910 | } |
| 4911 | |
| 4912 | |
| 4913 | static bfd_boolean |
| 4914 | _bfd_aarch64_erratum_843419_branch_to_stub (struct bfd_hash_entry *gen_entry, |
| 4915 | void *in_arg) |
| 4916 | { |
| 4917 | struct elf_aarch64_stub_hash_entry *stub_entry |
| 4918 | = (struct elf_aarch64_stub_hash_entry *) gen_entry; |
| 4919 | struct erratum_835769_branch_to_stub_data *data |
| 4920 | = (struct erratum_835769_branch_to_stub_data *) in_arg; |
| 4921 | struct bfd_link_info *info; |
| 4922 | struct elf_aarch64_link_hash_table *htab; |
| 4923 | bfd_byte *contents; |
| 4924 | asection *section; |
| 4925 | bfd *abfd; |
| 4926 | bfd_vma place; |
| 4927 | uint32_t insn; |
| 4928 | |
| 4929 | info = data->info; |
| 4930 | contents = data->contents; |
| 4931 | section = data->output_section; |
| 4932 | |
| 4933 | htab = elf_aarch64_hash_table (info); |
| 4934 | |
| 4935 | if (stub_entry->target_section != section |
| 4936 | || stub_entry->stub_type != aarch64_stub_erratum_843419_veneer) |
| 4937 | return TRUE; |
| 4938 | |
| 4939 | insn = bfd_getl32 (contents + stub_entry->target_value); |
| 4940 | bfd_putl32 (insn, |
| 4941 | stub_entry->stub_sec->contents + stub_entry->stub_offset); |
| 4942 | |
| 4943 | place = (section->output_section->vma + section->output_offset |
| 4944 | + stub_entry->adrp_offset); |
| 4945 | insn = bfd_getl32 (contents + stub_entry->adrp_offset); |
| 4946 | |
| 4947 | if ((insn & AARCH64_ADRP_OP_MASK) != AARCH64_ADRP_OP) |
| 4948 | abort (); |
| 4949 | |
| 4950 | bfd_signed_vma imm = |
| 4951 | (_bfd_aarch64_sign_extend |
| 4952 | ((bfd_vma) _bfd_aarch64_decode_adrp_imm (insn) << 12, 33) |
| 4953 | - (place & 0xfff)); |
| 4954 | |
| 4955 | if (htab->fix_erratum_843419_adr |
| 4956 | && (imm >= AARCH64_MIN_ADRP_IMM && imm <= AARCH64_MAX_ADRP_IMM)) |
| 4957 | { |
| 4958 | insn = (_bfd_aarch64_reencode_adr_imm (AARCH64_ADR_OP, imm) |
| 4959 | | AARCH64_RT (insn)); |
| 4960 | bfd_putl32 (insn, contents + stub_entry->adrp_offset); |
| 4961 | } |
| 4962 | else |
| 4963 | { |
| 4964 | bfd_vma veneered_insn_loc; |
| 4965 | bfd_vma veneer_entry_loc; |
| 4966 | bfd_signed_vma branch_offset; |
| 4967 | uint32_t branch_insn; |
| 4968 | |
| 4969 | veneered_insn_loc = stub_entry->target_section->output_section->vma |
| 4970 | + stub_entry->target_section->output_offset |
| 4971 | + stub_entry->target_value; |
| 4972 | veneer_entry_loc = stub_entry->stub_sec->output_section->vma |
| 4973 | + stub_entry->stub_sec->output_offset |
| 4974 | + stub_entry->stub_offset; |
| 4975 | branch_offset = veneer_entry_loc - veneered_insn_loc; |
| 4976 | |
| 4977 | abfd = stub_entry->target_section->owner; |
| 4978 | if (!aarch64_valid_branch_p (veneer_entry_loc, veneered_insn_loc)) |
| 4979 | _bfd_error_handler |
| 4980 | (_("%pB: error: erratum 843419 stub out " |
| 4981 | "of range (input file too large)"), abfd); |
| 4982 | |
| 4983 | branch_insn = 0x14000000; |
| 4984 | branch_offset >>= 2; |
| 4985 | branch_offset &= 0x3ffffff; |
| 4986 | branch_insn |= branch_offset; |
| 4987 | bfd_putl32 (branch_insn, contents + stub_entry->target_value); |
| 4988 | } |
| 4989 | return TRUE; |
| 4990 | } |
| 4991 | |
| 4992 | |
| 4993 | static bfd_boolean |
| 4994 | elfNN_aarch64_write_section (bfd *output_bfd ATTRIBUTE_UNUSED, |
| 4995 | struct bfd_link_info *link_info, |
| 4996 | asection *sec, |
| 4997 | bfd_byte *contents) |
| 4998 | |
| 4999 | { |
| 5000 | struct elf_aarch64_link_hash_table *globals = |
| 5001 | elf_aarch64_hash_table (link_info); |
| 5002 | |
| 5003 | if (globals == NULL) |
| 5004 | return FALSE; |
| 5005 | |
| 5006 | /* Fix code to point to erratum 835769 stubs. */ |
| 5007 | if (globals->fix_erratum_835769) |
| 5008 | { |
| 5009 | struct erratum_835769_branch_to_stub_data data; |
| 5010 | |
| 5011 | data.info = link_info; |
| 5012 | data.output_section = sec; |
| 5013 | data.contents = contents; |
| 5014 | bfd_hash_traverse (&globals->stub_hash_table, |
| 5015 | make_branch_to_erratum_835769_stub, &data); |
| 5016 | } |
| 5017 | |
| 5018 | if (globals->fix_erratum_843419) |
| 5019 | { |
| 5020 | struct erratum_835769_branch_to_stub_data data; |
| 5021 | |
| 5022 | data.info = link_info; |
| 5023 | data.output_section = sec; |
| 5024 | data.contents = contents; |
| 5025 | bfd_hash_traverse (&globals->stub_hash_table, |
| 5026 | _bfd_aarch64_erratum_843419_branch_to_stub, &data); |
| 5027 | } |
| 5028 | |
| 5029 | return FALSE; |
| 5030 | } |
| 5031 | |
| 5032 | /* Return TRUE if RELOC is a relocation against the base of GOT table. */ |
| 5033 | |
| 5034 | static bfd_boolean |
| 5035 | aarch64_relocation_aginst_gp_p (bfd_reloc_code_real_type reloc) |
| 5036 | { |
| 5037 | return (reloc == BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14 |
| 5038 | || reloc == BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15 |
| 5039 | || reloc == BFD_RELOC_AARCH64_LD64_GOTOFF_LO15 |
| 5040 | || reloc == BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC |
| 5041 | || reloc == BFD_RELOC_AARCH64_MOVW_GOTOFF_G1); |
| 5042 | } |
| 5043 | |
| 5044 | /* Perform a relocation as part of a final link. The input relocation type |
| 5045 | should be TLS relaxed. */ |
| 5046 | |
| 5047 | static bfd_reloc_status_type |
| 5048 | elfNN_aarch64_final_link_relocate (reloc_howto_type *howto, |
| 5049 | bfd *input_bfd, |
| 5050 | bfd *output_bfd, |
| 5051 | asection *input_section, |
| 5052 | bfd_byte *contents, |
| 5053 | Elf_Internal_Rela *rel, |
| 5054 | bfd_vma value, |
| 5055 | struct bfd_link_info *info, |
| 5056 | asection *sym_sec, |
| 5057 | struct elf_link_hash_entry *h, |
| 5058 | bfd_boolean *unresolved_reloc_p, |
| 5059 | bfd_boolean save_addend, |
| 5060 | bfd_vma *saved_addend, |
| 5061 | Elf_Internal_Sym *sym) |
| 5062 | { |
| 5063 | Elf_Internal_Shdr *symtab_hdr; |
| 5064 | unsigned int r_type = howto->type; |
| 5065 | bfd_reloc_code_real_type bfd_r_type |
| 5066 | = elfNN_aarch64_bfd_reloc_from_howto (howto); |
| 5067 | unsigned long r_symndx; |
| 5068 | bfd_byte *hit_data = contents + rel->r_offset; |
| 5069 | bfd_vma place, off, got_entry_addr = 0; |
| 5070 | bfd_signed_vma signed_addend; |
| 5071 | struct elf_aarch64_link_hash_table *globals; |
| 5072 | bfd_boolean weak_undef_p; |
| 5073 | bfd_boolean relative_reloc; |
| 5074 | asection *base_got; |
| 5075 | bfd_vma orig_value = value; |
| 5076 | bfd_boolean resolved_to_zero; |
| 5077 | bfd_boolean abs_symbol_p; |
| 5078 | |
| 5079 | globals = elf_aarch64_hash_table (info); |
| 5080 | |
| 5081 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
| 5082 | |
| 5083 | BFD_ASSERT (is_aarch64_elf (input_bfd)); |
| 5084 | |
| 5085 | r_symndx = ELFNN_R_SYM (rel->r_info); |
| 5086 | |
| 5087 | place = input_section->output_section->vma |
| 5088 | + input_section->output_offset + rel->r_offset; |
| 5089 | |
| 5090 | /* Get addend, accumulating the addend for consecutive relocs |
| 5091 | which refer to the same offset. */ |
| 5092 | signed_addend = saved_addend ? *saved_addend : 0; |
| 5093 | signed_addend += rel->r_addend; |
| 5094 | |
| 5095 | weak_undef_p = (h ? h->root.type == bfd_link_hash_undefweak |
| 5096 | : bfd_is_und_section (sym_sec)); |
| 5097 | abs_symbol_p = (h !=NULL && h->root.type == bfd_link_hash_defined |
| 5098 | && bfd_is_abs_section (h->root.u.def.section)); |
| 5099 | |
| 5100 | |
| 5101 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle |
| 5102 | it here if it is defined in a non-shared object. */ |
| 5103 | if (h != NULL |
| 5104 | && h->type == STT_GNU_IFUNC |
| 5105 | && h->def_regular) |
| 5106 | { |
| 5107 | asection *plt; |
| 5108 | const char *name; |
| 5109 | bfd_vma addend = 0; |
| 5110 | |
| 5111 | if ((input_section->flags & SEC_ALLOC) == 0) |
| 5112 | { |
| 5113 | /* Dynamic relocs are not propagated for SEC_DEBUGGING |
| 5114 | sections because such sections are not SEC_ALLOC and |
| 5115 | thus ld.so will not process them. */ |
| 5116 | if ((input_section->flags & SEC_DEBUGGING) != 0) |
| 5117 | return bfd_reloc_ok; |
| 5118 | |
| 5119 | if (h->root.root.string) |
| 5120 | name = h->root.root.string; |
| 5121 | else |
| 5122 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, NULL); |
| 5123 | _bfd_error_handler |
| 5124 | /* xgettext:c-format */ |
| 5125 | (_("%pB(%pA+%#" PRIx64 "): " |
| 5126 | "unresolvable %s relocation against symbol `%s'"), |
| 5127 | input_bfd, input_section, (uint64_t) rel->r_offset, |
| 5128 | howto->name, name); |
| 5129 | bfd_set_error (bfd_error_bad_value); |
| 5130 | return bfd_reloc_notsupported; |
| 5131 | } |
| 5132 | else if (h->plt.offset == (bfd_vma) -1) |
| 5133 | goto bad_ifunc_reloc; |
| 5134 | |
| 5135 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
| 5136 | plt = globals->root.splt ? globals->root.splt : globals->root.iplt; |
| 5137 | value = (plt->output_section->vma + plt->output_offset + h->plt.offset); |
| 5138 | |
| 5139 | switch (bfd_r_type) |
| 5140 | { |
| 5141 | default: |
| 5142 | bad_ifunc_reloc: |
| 5143 | if (h->root.root.string) |
| 5144 | name = h->root.root.string; |
| 5145 | else |
| 5146 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, |
| 5147 | NULL); |
| 5148 | _bfd_error_handler |
| 5149 | /* xgettext:c-format */ |
| 5150 | (_("%pB: relocation %s against STT_GNU_IFUNC " |
| 5151 | "symbol `%s' isn't handled by %s"), input_bfd, |
| 5152 | howto->name, name, __FUNCTION__); |
| 5153 | bfd_set_error (bfd_error_bad_value); |
| 5154 | return bfd_reloc_notsupported; |
| 5155 | |
| 5156 | case BFD_RELOC_AARCH64_NN: |
| 5157 | if (rel->r_addend != 0) |
| 5158 | { |
| 5159 | if (h->root.root.string) |
| 5160 | name = h->root.root.string; |
| 5161 | else |
| 5162 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, |
| 5163 | sym, NULL); |
| 5164 | _bfd_error_handler |
| 5165 | /* xgettext:c-format */ |
| 5166 | (_("%pB: relocation %s against STT_GNU_IFUNC " |
| 5167 | "symbol `%s' has non-zero addend: %" PRId64), |
| 5168 | input_bfd, howto->name, name, (int64_t) rel->r_addend); |
| 5169 | bfd_set_error (bfd_error_bad_value); |
| 5170 | return bfd_reloc_notsupported; |
| 5171 | } |
| 5172 | |
| 5173 | /* Generate dynamic relocation only when there is a |
| 5174 | non-GOT reference in a shared object. */ |
| 5175 | if (bfd_link_pic (info) && h->non_got_ref) |
| 5176 | { |
| 5177 | Elf_Internal_Rela outrel; |
| 5178 | asection *sreloc; |
| 5179 | |
| 5180 | /* Need a dynamic relocation to get the real function |
| 5181 | address. */ |
| 5182 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, |
| 5183 | info, |
| 5184 | input_section, |
| 5185 | rel->r_offset); |
| 5186 | if (outrel.r_offset == (bfd_vma) -1 |
| 5187 | || outrel.r_offset == (bfd_vma) -2) |
| 5188 | abort (); |
| 5189 | |
| 5190 | outrel.r_offset += (input_section->output_section->vma |
| 5191 | + input_section->output_offset); |
| 5192 | |
| 5193 | if (h->dynindx == -1 |
| 5194 | || h->forced_local |
| 5195 | || bfd_link_executable (info)) |
| 5196 | { |
| 5197 | /* This symbol is resolved locally. */ |
| 5198 | outrel.r_info = ELFNN_R_INFO (0, AARCH64_R (IRELATIVE)); |
| 5199 | outrel.r_addend = (h->root.u.def.value |
| 5200 | + h->root.u.def.section->output_section->vma |
| 5201 | + h->root.u.def.section->output_offset); |
| 5202 | } |
| 5203 | else |
| 5204 | { |
| 5205 | outrel.r_info = ELFNN_R_INFO (h->dynindx, r_type); |
| 5206 | outrel.r_addend = 0; |
| 5207 | } |
| 5208 | |
| 5209 | sreloc = globals->root.irelifunc; |
| 5210 | elf_append_rela (output_bfd, sreloc, &outrel); |
| 5211 | |
| 5212 | /* If this reloc is against an external symbol, we |
| 5213 | do not want to fiddle with the addend. Otherwise, |
| 5214 | we need to include the symbol value so that it |
| 5215 | becomes an addend for the dynamic reloc. For an |
| 5216 | internal symbol, we have updated addend. */ |
| 5217 | return bfd_reloc_ok; |
| 5218 | } |
| 5219 | /* FALLTHROUGH */ |
| 5220 | case BFD_RELOC_AARCH64_CALL26: |
| 5221 | case BFD_RELOC_AARCH64_JUMP26: |
| 5222 | value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value, |
| 5223 | signed_addend, |
| 5224 | weak_undef_p); |
| 5225 | return _bfd_aarch64_elf_put_addend (input_bfd, hit_data, bfd_r_type, |
| 5226 | howto, value); |
| 5227 | case BFD_RELOC_AARCH64_ADR_GOT_PAGE: |
| 5228 | case BFD_RELOC_AARCH64_GOT_LD_PREL19: |
| 5229 | case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14: |
| 5230 | case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC: |
| 5231 | case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15: |
| 5232 | case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC: |
| 5233 | case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1: |
| 5234 | case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15: |
| 5235 | case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC: |
| 5236 | base_got = globals->root.sgot; |
| 5237 | off = h->got.offset; |
| 5238 | |
| 5239 | if (base_got == NULL) |
| 5240 | abort (); |
| 5241 | |
| 5242 | if (off == (bfd_vma) -1) |
| 5243 | { |
| 5244 | bfd_vma plt_index; |
| 5245 | |
| 5246 | /* We can't use h->got.offset here to save state, or |
| 5247 | even just remember the offset, as finish_dynamic_symbol |
| 5248 | would use that as offset into .got. */ |
| 5249 | |
| 5250 | if (globals->root.splt != NULL) |
| 5251 | { |
| 5252 | plt_index = ((h->plt.offset - globals->plt_header_size) / |
| 5253 | globals->plt_entry_size); |
| 5254 | off = (plt_index + 3) * GOT_ENTRY_SIZE; |
| 5255 | base_got = globals->root.sgotplt; |
| 5256 | } |
| 5257 | else |
| 5258 | { |
| 5259 | plt_index = h->plt.offset / globals->plt_entry_size; |
| 5260 | off = plt_index * GOT_ENTRY_SIZE; |
| 5261 | base_got = globals->root.igotplt; |
| 5262 | } |
| 5263 | |
| 5264 | if (h->dynindx == -1 |
| 5265 | || h->forced_local |
| 5266 | || info->symbolic) |
| 5267 | { |
| 5268 | /* This references the local definition. We must |
| 5269 | initialize this entry in the global offset table. |
| 5270 | Since the offset must always be a multiple of 8, |
| 5271 | we use the least significant bit to record |
| 5272 | whether we have initialized it already. |
| 5273 | |
| 5274 | When doing a dynamic link, we create a .rela.got |
| 5275 | relocation entry to initialize the value. This |
| 5276 | is done in the finish_dynamic_symbol routine. */ |
| 5277 | if ((off & 1) != 0) |
| 5278 | off &= ~1; |
| 5279 | else |
| 5280 | { |
| 5281 | bfd_put_NN (output_bfd, value, |
| 5282 | base_got->contents + off); |
| 5283 | /* Note that this is harmless as -1 | 1 still is -1. */ |
| 5284 | h->got.offset |= 1; |
| 5285 | } |
| 5286 | } |
| 5287 | value = (base_got->output_section->vma |
| 5288 | + base_got->output_offset + off); |
| 5289 | } |
| 5290 | else |
| 5291 | value = aarch64_calculate_got_entry_vma (h, globals, info, |
| 5292 | value, output_bfd, |
| 5293 | unresolved_reloc_p); |
| 5294 | |
| 5295 | if (aarch64_relocation_aginst_gp_p (bfd_r_type)) |
| 5296 | addend = (globals->root.sgot->output_section->vma |
| 5297 | + globals->root.sgot->output_offset); |
| 5298 | |
| 5299 | value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value, |
| 5300 | addend, weak_undef_p); |
| 5301 | return _bfd_aarch64_elf_put_addend (input_bfd, hit_data, bfd_r_type, howto, value); |
| 5302 | case BFD_RELOC_AARCH64_ADD_LO12: |
| 5303 | case BFD_RELOC_AARCH64_ADR_HI21_PCREL: |
| 5304 | break; |
| 5305 | } |
| 5306 | } |
| 5307 | |
| 5308 | resolved_to_zero = (h != NULL |
| 5309 | && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)); |
| 5310 | |
| 5311 | switch (bfd_r_type) |
| 5312 | { |
| 5313 | case BFD_RELOC_AARCH64_NONE: |
| 5314 | case BFD_RELOC_AARCH64_TLSDESC_ADD: |
| 5315 | case BFD_RELOC_AARCH64_TLSDESC_CALL: |
| 5316 | case BFD_RELOC_AARCH64_TLSDESC_LDR: |
| 5317 | *unresolved_reloc_p = FALSE; |
| 5318 | return bfd_reloc_ok; |
| 5319 | |
| 5320 | case BFD_RELOC_AARCH64_NN: |
| 5321 | |
| 5322 | /* When generating a shared object or relocatable executable, these |
| 5323 | relocations are copied into the output file to be resolved at |
| 5324 | run time. */ |
| 5325 | if (((bfd_link_pic (info) |
| 5326 | || globals->root.is_relocatable_executable) |
| 5327 | && (input_section->flags & SEC_ALLOC) |
| 5328 | && (h == NULL |
| 5329 | || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 5330 | && !resolved_to_zero) |
| 5331 | || h->root.type != bfd_link_hash_undefweak)) |
| 5332 | /* Or we are creating an executable, we may need to keep relocations |
| 5333 | for symbols satisfied by a dynamic library if we manage to avoid |
| 5334 | copy relocs for the symbol. */ |
| 5335 | || (ELIMINATE_COPY_RELOCS |
| 5336 | && !bfd_link_pic (info) |
| 5337 | && h != NULL |
| 5338 | && (input_section->flags & SEC_ALLOC) |
| 5339 | && h->dynindx != -1 |
| 5340 | && !h->non_got_ref |
| 5341 | && ((h->def_dynamic |
| 5342 | && !h->def_regular) |
| 5343 | || h->root.type == bfd_link_hash_undefweak |
| 5344 | || h->root.type == bfd_link_hash_undefined))) |
| 5345 | { |
| 5346 | Elf_Internal_Rela outrel; |
| 5347 | bfd_byte *loc; |
| 5348 | bfd_boolean skip, relocate; |
| 5349 | asection *sreloc; |
| 5350 | |
| 5351 | *unresolved_reloc_p = FALSE; |
| 5352 | |
| 5353 | skip = FALSE; |
| 5354 | relocate = FALSE; |
| 5355 | |
| 5356 | outrel.r_addend = signed_addend; |
| 5357 | outrel.r_offset = |
| 5358 | _bfd_elf_section_offset (output_bfd, info, input_section, |
| 5359 | rel->r_offset); |
| 5360 | if (outrel.r_offset == (bfd_vma) - 1) |
| 5361 | skip = TRUE; |
| 5362 | else if (outrel.r_offset == (bfd_vma) - 2) |
| 5363 | { |
| 5364 | skip = TRUE; |
| 5365 | relocate = TRUE; |
| 5366 | } |
| 5367 | else if (abs_symbol_p) |
| 5368 | { |
| 5369 | /* Local absolute symbol. */ |
| 5370 | skip = (h->forced_local || (h->dynindx == -1)); |
| 5371 | relocate = skip; |
| 5372 | } |
| 5373 | |
| 5374 | outrel.r_offset += (input_section->output_section->vma |
| 5375 | + input_section->output_offset); |
| 5376 | |
| 5377 | if (skip) |
| 5378 | memset (&outrel, 0, sizeof outrel); |
| 5379 | else if (h != NULL |
| 5380 | && h->dynindx != -1 |
| 5381 | && (!bfd_link_pic (info) |
| 5382 | || !(bfd_link_pie (info) || SYMBOLIC_BIND (info, h)) |
| 5383 | || !h->def_regular)) |
| 5384 | outrel.r_info = ELFNN_R_INFO (h->dynindx, r_type); |
| 5385 | else |
| 5386 | { |
| 5387 | int symbol; |
| 5388 | |
| 5389 | /* On SVR4-ish systems, the dynamic loader cannot |
| 5390 | relocate the text and data segments independently, |
| 5391 | so the symbol does not matter. */ |
| 5392 | symbol = 0; |
| 5393 | relocate = globals->no_apply_dynamic_relocs ? FALSE : TRUE; |
| 5394 | outrel.r_info = ELFNN_R_INFO (symbol, AARCH64_R (RELATIVE)); |
| 5395 | outrel.r_addend += value; |
| 5396 | } |
| 5397 | |
| 5398 | sreloc = elf_section_data (input_section)->sreloc; |
| 5399 | if (sreloc == NULL || sreloc->contents == NULL) |
| 5400 | return bfd_reloc_notsupported; |
| 5401 | |
| 5402 | loc = sreloc->contents + sreloc->reloc_count++ * RELOC_SIZE (globals); |
| 5403 | bfd_elfNN_swap_reloca_out (output_bfd, &outrel, loc); |
| 5404 | |
| 5405 | if (sreloc->reloc_count * RELOC_SIZE (globals) > sreloc->size) |
| 5406 | { |
| 5407 | /* Sanity to check that we have previously allocated |
| 5408 | sufficient space in the relocation section for the |
| 5409 | number of relocations we actually want to emit. */ |
| 5410 | abort (); |
| 5411 | } |
| 5412 | |
| 5413 | /* If this reloc is against an external symbol, we do not want to |
| 5414 | fiddle with the addend. Otherwise, we need to include the symbol |
| 5415 | value so that it becomes an addend for the dynamic reloc. */ |
| 5416 | if (!relocate) |
| 5417 | return bfd_reloc_ok; |
| 5418 | |
| 5419 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 5420 | contents, rel->r_offset, value, |
| 5421 | signed_addend); |
| 5422 | } |
| 5423 | else |
| 5424 | value += signed_addend; |
| 5425 | break; |
| 5426 | |
| 5427 | case BFD_RELOC_AARCH64_CALL26: |
| 5428 | case BFD_RELOC_AARCH64_JUMP26: |
| 5429 | { |
| 5430 | asection *splt = globals->root.splt; |
| 5431 | bfd_boolean via_plt_p = |
| 5432 | splt != NULL && h != NULL && h->plt.offset != (bfd_vma) - 1; |
| 5433 | |
| 5434 | /* A call to an undefined weak symbol is converted to a jump to |
| 5435 | the next instruction unless a PLT entry will be created. |
| 5436 | The jump to the next instruction is optimized as a NOP. |
| 5437 | Do the same for local undefined symbols. */ |
| 5438 | if (weak_undef_p && ! via_plt_p) |
| 5439 | { |
| 5440 | bfd_putl32 (INSN_NOP, hit_data); |
| 5441 | return bfd_reloc_ok; |
| 5442 | } |
| 5443 | |
| 5444 | /* If the call goes through a PLT entry, make sure to |
| 5445 | check distance to the right destination address. */ |
| 5446 | if (via_plt_p) |
| 5447 | value = (splt->output_section->vma |
| 5448 | + splt->output_offset + h->plt.offset); |
| 5449 | |
| 5450 | /* Check if a stub has to be inserted because the destination |
| 5451 | is too far away. */ |
| 5452 | struct elf_aarch64_stub_hash_entry *stub_entry = NULL; |
| 5453 | |
| 5454 | /* If the branch destination is directed to plt stub, "value" will be |
| 5455 | the final destination, otherwise we should plus signed_addend, it may |
| 5456 | contain non-zero value, for example call to local function symbol |
| 5457 | which are turned into "sec_sym + sec_off", and sec_off is kept in |
| 5458 | signed_addend. */ |
| 5459 | if (! aarch64_valid_branch_p (via_plt_p ? value : value + signed_addend, |
| 5460 | place)) |
| 5461 | /* The target is out of reach, so redirect the branch to |
| 5462 | the local stub for this function. */ |
| 5463 | stub_entry = elfNN_aarch64_get_stub_entry (input_section, sym_sec, h, |
| 5464 | rel, globals); |
| 5465 | if (stub_entry != NULL) |
| 5466 | { |
| 5467 | value = (stub_entry->stub_offset |
| 5468 | + stub_entry->stub_sec->output_offset |
| 5469 | + stub_entry->stub_sec->output_section->vma); |
| 5470 | |
| 5471 | /* We have redirected the destination to stub entry address, |
| 5472 | so ignore any addend record in the original rela entry. */ |
| 5473 | signed_addend = 0; |
| 5474 | } |
| 5475 | } |
| 5476 | value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value, |
| 5477 | signed_addend, weak_undef_p); |
| 5478 | *unresolved_reloc_p = FALSE; |
| 5479 | break; |
| 5480 | |
| 5481 | case BFD_RELOC_AARCH64_16_PCREL: |
| 5482 | case BFD_RELOC_AARCH64_32_PCREL: |
| 5483 | case BFD_RELOC_AARCH64_64_PCREL: |
| 5484 | case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL: |
| 5485 | case BFD_RELOC_AARCH64_ADR_HI21_PCREL: |
| 5486 | case BFD_RELOC_AARCH64_ADR_LO21_PCREL: |
| 5487 | case BFD_RELOC_AARCH64_LD_LO19_PCREL: |
| 5488 | case BFD_RELOC_AARCH64_MOVW_PREL_G0: |
| 5489 | case BFD_RELOC_AARCH64_MOVW_PREL_G0_NC: |
| 5490 | case BFD_RELOC_AARCH64_MOVW_PREL_G1: |
| 5491 | case BFD_RELOC_AARCH64_MOVW_PREL_G1_NC: |
| 5492 | case BFD_RELOC_AARCH64_MOVW_PREL_G2: |
| 5493 | case BFD_RELOC_AARCH64_MOVW_PREL_G2_NC: |
| 5494 | case BFD_RELOC_AARCH64_MOVW_PREL_G3: |
| 5495 | if (bfd_link_pic (info) |
| 5496 | && (input_section->flags & SEC_ALLOC) != 0 |
| 5497 | && (input_section->flags & SEC_READONLY) != 0 |
| 5498 | && !SYMBOL_REFERENCES_LOCAL (info, h)) |
| 5499 | { |
| 5500 | int howto_index = bfd_r_type - BFD_RELOC_AARCH64_RELOC_START; |
| 5501 | |
| 5502 | _bfd_error_handler |
| 5503 | /* xgettext:c-format */ |
| 5504 | (_("%pB: relocation %s against symbol `%s' which may bind " |
| 5505 | "externally can not be used when making a shared object; " |
| 5506 | "recompile with -fPIC"), |
| 5507 | input_bfd, elfNN_aarch64_howto_table[howto_index].name, |
| 5508 | h->root.root.string); |
| 5509 | bfd_set_error (bfd_error_bad_value); |
| 5510 | return bfd_reloc_notsupported; |
| 5511 | } |
| 5512 | /* Fall through. */ |
| 5513 | |
| 5514 | case BFD_RELOC_AARCH64_16: |
| 5515 | #if ARCH_SIZE == 64 |
| 5516 | case BFD_RELOC_AARCH64_32: |
| 5517 | #endif |
| 5518 | case BFD_RELOC_AARCH64_ADD_LO12: |
| 5519 | case BFD_RELOC_AARCH64_BRANCH19: |
| 5520 | case BFD_RELOC_AARCH64_LDST128_LO12: |
| 5521 | case BFD_RELOC_AARCH64_LDST16_LO12: |
| 5522 | case BFD_RELOC_AARCH64_LDST32_LO12: |
| 5523 | case BFD_RELOC_AARCH64_LDST64_LO12: |
| 5524 | case BFD_RELOC_AARCH64_LDST8_LO12: |
| 5525 | case BFD_RELOC_AARCH64_MOVW_G0: |
| 5526 | case BFD_RELOC_AARCH64_MOVW_G0_NC: |
| 5527 | case BFD_RELOC_AARCH64_MOVW_G0_S: |
| 5528 | case BFD_RELOC_AARCH64_MOVW_G1: |
| 5529 | case BFD_RELOC_AARCH64_MOVW_G1_NC: |
| 5530 | case BFD_RELOC_AARCH64_MOVW_G1_S: |
| 5531 | case BFD_RELOC_AARCH64_MOVW_G2: |
| 5532 | case BFD_RELOC_AARCH64_MOVW_G2_NC: |
| 5533 | case BFD_RELOC_AARCH64_MOVW_G2_S: |
| 5534 | case BFD_RELOC_AARCH64_MOVW_G3: |
| 5535 | case BFD_RELOC_AARCH64_TSTBR14: |
| 5536 | value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value, |
| 5537 | signed_addend, weak_undef_p); |
| 5538 | break; |
| 5539 | |
| 5540 | case BFD_RELOC_AARCH64_ADR_GOT_PAGE: |
| 5541 | case BFD_RELOC_AARCH64_GOT_LD_PREL19: |
| 5542 | case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14: |
| 5543 | case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC: |
| 5544 | case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15: |
| 5545 | case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC: |
| 5546 | case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15: |
| 5547 | case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC: |
| 5548 | case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1: |
| 5549 | if (globals->root.sgot == NULL) |
| 5550 | BFD_ASSERT (h != NULL); |
| 5551 | |
| 5552 | relative_reloc = FALSE; |
| 5553 | if (h != NULL) |
| 5554 | { |
| 5555 | bfd_vma addend = 0; |
| 5556 | |
| 5557 | /* If a symbol is not dynamic and is not undefined weak, bind it |
| 5558 | locally and generate a RELATIVE relocation under PIC mode. |
| 5559 | |
| 5560 | NOTE: one symbol may be referenced by several relocations, we |
| 5561 | should only generate one RELATIVE relocation for that symbol. |
| 5562 | Therefore, check GOT offset mark first. */ |
| 5563 | if (h->dynindx == -1 |
| 5564 | && !h->forced_local |
| 5565 | && h->root.type != bfd_link_hash_undefweak |
| 5566 | && bfd_link_pic (info) |
| 5567 | && !symbol_got_offset_mark_p (input_bfd, h, r_symndx)) |
| 5568 | relative_reloc = TRUE; |
| 5569 | |
| 5570 | value = aarch64_calculate_got_entry_vma (h, globals, info, value, |
| 5571 | output_bfd, |
| 5572 | unresolved_reloc_p); |
| 5573 | /* Record the GOT entry address which will be used when generating |
| 5574 | RELATIVE relocation. */ |
| 5575 | if (relative_reloc) |
| 5576 | got_entry_addr = value; |
| 5577 | |
| 5578 | if (aarch64_relocation_aginst_gp_p (bfd_r_type)) |
| 5579 | addend = (globals->root.sgot->output_section->vma |
| 5580 | + globals->root.sgot->output_offset); |
| 5581 | value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value, |
| 5582 | addend, weak_undef_p); |
| 5583 | } |
| 5584 | else |
| 5585 | { |
| 5586 | bfd_vma addend = 0; |
| 5587 | struct elf_aarch64_local_symbol *locals |
| 5588 | = elf_aarch64_locals (input_bfd); |
| 5589 | |
| 5590 | if (locals == NULL) |
| 5591 | { |
| 5592 | int howto_index = bfd_r_type - BFD_RELOC_AARCH64_RELOC_START; |
| 5593 | _bfd_error_handler |
| 5594 | /* xgettext:c-format */ |
| 5595 | (_("%pB: local symbol descriptor table be NULL when applying " |
| 5596 | "relocation %s against local symbol"), |
| 5597 | input_bfd, elfNN_aarch64_howto_table[howto_index].name); |
| 5598 | abort (); |
| 5599 | } |
| 5600 | |
| 5601 | off = symbol_got_offset (input_bfd, h, r_symndx); |
| 5602 | base_got = globals->root.sgot; |
| 5603 | got_entry_addr = (base_got->output_section->vma |
| 5604 | + base_got->output_offset + off); |
| 5605 | |
| 5606 | if (!symbol_got_offset_mark_p (input_bfd, h, r_symndx)) |
| 5607 | { |
| 5608 | bfd_put_64 (output_bfd, value, base_got->contents + off); |
| 5609 | |
| 5610 | /* For local symbol, we have done absolute relocation in static |
| 5611 | linking stage. While for shared library, we need to update the |
| 5612 | content of GOT entry according to the shared object's runtime |
| 5613 | base address. So, we need to generate a R_AARCH64_RELATIVE reloc |
| 5614 | for dynamic linker. */ |
| 5615 | if (bfd_link_pic (info)) |
| 5616 | relative_reloc = TRUE; |
| 5617 | |
| 5618 | symbol_got_offset_mark (input_bfd, h, r_symndx); |
| 5619 | } |
| 5620 | |
| 5621 | /* Update the relocation value to GOT entry addr as we have transformed |
| 5622 | the direct data access into indirect data access through GOT. */ |
| 5623 | value = got_entry_addr; |
| 5624 | |
| 5625 | if (aarch64_relocation_aginst_gp_p (bfd_r_type)) |
| 5626 | addend = base_got->output_section->vma + base_got->output_offset; |
| 5627 | |
| 5628 | value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value, |
| 5629 | addend, weak_undef_p); |
| 5630 | } |
| 5631 | |
| 5632 | if (relative_reloc) |
| 5633 | { |
| 5634 | asection *s; |
| 5635 | Elf_Internal_Rela outrel; |
| 5636 | |
| 5637 | s = globals->root.srelgot; |
| 5638 | if (s == NULL) |
| 5639 | abort (); |
| 5640 | |
| 5641 | outrel.r_offset = got_entry_addr; |
| 5642 | outrel.r_info = ELFNN_R_INFO (0, AARCH64_R (RELATIVE)); |
| 5643 | outrel.r_addend = orig_value; |
| 5644 | elf_append_rela (output_bfd, s, &outrel); |
| 5645 | } |
| 5646 | break; |
| 5647 | |
| 5648 | case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC: |
| 5649 | case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21: |
| 5650 | case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21: |
| 5651 | case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: |
| 5652 | case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC: |
| 5653 | case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: |
| 5654 | case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19: |
| 5655 | case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC: |
| 5656 | case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21: |
| 5657 | case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21: |
| 5658 | if (globals->root.sgot == NULL) |
| 5659 | return bfd_reloc_notsupported; |
| 5660 | |
| 5661 | value = (symbol_got_offset (input_bfd, h, r_symndx) |
| 5662 | + globals->root.sgot->output_section->vma |
| 5663 | + globals->root.sgot->output_offset); |
| 5664 | |
| 5665 | value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value, |
| 5666 | 0, weak_undef_p); |
| 5667 | *unresolved_reloc_p = FALSE; |
| 5668 | break; |
| 5669 | |
| 5670 | case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC: |
| 5671 | case BFD_RELOC_AARCH64_TLSGD_MOVW_G1: |
| 5672 | case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC: |
| 5673 | case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1: |
| 5674 | if (globals->root.sgot == NULL) |
| 5675 | return bfd_reloc_notsupported; |
| 5676 | |
| 5677 | value = symbol_got_offset (input_bfd, h, r_symndx); |
| 5678 | value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value, |
| 5679 | 0, weak_undef_p); |
| 5680 | *unresolved_reloc_p = FALSE; |
| 5681 | break; |
| 5682 | |
| 5683 | case BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_HI12: |
| 5684 | case BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12: |
| 5685 | case BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12_NC: |
| 5686 | case BFD_RELOC_AARCH64_TLSLD_LDST16_DTPREL_LO12: |
| 5687 | case BFD_RELOC_AARCH64_TLSLD_LDST16_DTPREL_LO12_NC: |
| 5688 | case BFD_RELOC_AARCH64_TLSLD_LDST32_DTPREL_LO12: |
| 5689 | case BFD_RELOC_AARCH64_TLSLD_LDST32_DTPREL_LO12_NC: |
| 5690 | case BFD_RELOC_AARCH64_TLSLD_LDST64_DTPREL_LO12: |
| 5691 | case BFD_RELOC_AARCH64_TLSLD_LDST64_DTPREL_LO12_NC: |
| 5692 | case BFD_RELOC_AARCH64_TLSLD_LDST8_DTPREL_LO12: |
| 5693 | case BFD_RELOC_AARCH64_TLSLD_LDST8_DTPREL_LO12_NC: |
| 5694 | case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G0: |
| 5695 | case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G0_NC: |
| 5696 | case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G1: |
| 5697 | case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G1_NC: |
| 5698 | case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G2: |
| 5699 | value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value, |
| 5700 | signed_addend - dtpoff_base (info), |
| 5701 | weak_undef_p); |
| 5702 | break; |
| 5703 | |
| 5704 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12: |
| 5705 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12: |
| 5706 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC: |
| 5707 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0: |
| 5708 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC: |
| 5709 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1: |
| 5710 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC: |
| 5711 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2: |
| 5712 | value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value, |
| 5713 | signed_addend - tpoff_base (info), |
| 5714 | weak_undef_p); |
| 5715 | *unresolved_reloc_p = FALSE; |
| 5716 | break; |
| 5717 | |
| 5718 | case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12: |
| 5719 | case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21: |
| 5720 | case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21: |
| 5721 | case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC: |
| 5722 | case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12: |
| 5723 | case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19: |
| 5724 | if (globals->root.sgot == NULL) |
| 5725 | return bfd_reloc_notsupported; |
| 5726 | value = (symbol_tlsdesc_got_offset (input_bfd, h, r_symndx) |
| 5727 | + globals->root.sgotplt->output_section->vma |
| 5728 | + globals->root.sgotplt->output_offset |
| 5729 | + globals->sgotplt_jump_table_size); |
| 5730 | |
| 5731 | value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value, |
| 5732 | 0, weak_undef_p); |
| 5733 | *unresolved_reloc_p = FALSE; |
| 5734 | break; |
| 5735 | |
| 5736 | case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC: |
| 5737 | case BFD_RELOC_AARCH64_TLSDESC_OFF_G1: |
| 5738 | if (globals->root.sgot == NULL) |
| 5739 | return bfd_reloc_notsupported; |
| 5740 | |
| 5741 | value = (symbol_tlsdesc_got_offset (input_bfd, h, r_symndx) |
| 5742 | + globals->root.sgotplt->output_section->vma |
| 5743 | + globals->root.sgotplt->output_offset |
| 5744 | + globals->sgotplt_jump_table_size); |
| 5745 | |
| 5746 | value -= (globals->root.sgot->output_section->vma |
| 5747 | + globals->root.sgot->output_offset); |
| 5748 | |
| 5749 | value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value, |
| 5750 | 0, weak_undef_p); |
| 5751 | *unresolved_reloc_p = FALSE; |
| 5752 | break; |
| 5753 | |
| 5754 | default: |
| 5755 | return bfd_reloc_notsupported; |
| 5756 | } |
| 5757 | |
| 5758 | if (saved_addend) |
| 5759 | *saved_addend = value; |
| 5760 | |
| 5761 | /* Only apply the final relocation in a sequence. */ |
| 5762 | if (save_addend) |
| 5763 | return bfd_reloc_continue; |
| 5764 | |
| 5765 | return _bfd_aarch64_elf_put_addend (input_bfd, hit_data, bfd_r_type, |
| 5766 | howto, value); |
| 5767 | } |
| 5768 | |
| 5769 | /* LP64 and ILP32 operates on x- and w-registers respectively. |
| 5770 | Next definitions take into account the difference between |
| 5771 | corresponding machine codes. R means x-register if the target |
| 5772 | arch is LP64, and w-register if the target is ILP32. */ |
| 5773 | |
| 5774 | #if ARCH_SIZE == 64 |
| 5775 | # define add_R0_R0 (0x91000000) |
| 5776 | # define add_R0_R0_R1 (0x8b000020) |
| 5777 | # define add_R0_R1 (0x91400020) |
| 5778 | # define ldr_R0 (0x58000000) |
| 5779 | # define ldr_R0_mask(i) (i & 0xffffffe0) |
| 5780 | # define ldr_R0_x0 (0xf9400000) |
| 5781 | # define ldr_hw_R0 (0xf2a00000) |
| 5782 | # define movk_R0 (0xf2800000) |
| 5783 | # define movz_R0 (0xd2a00000) |
| 5784 | # define movz_hw_R0 (0xd2c00000) |
| 5785 | #else /*ARCH_SIZE == 32 */ |
| 5786 | # define add_R0_R0 (0x11000000) |
| 5787 | # define add_R0_R0_R1 (0x0b000020) |
| 5788 | # define add_R0_R1 (0x11400020) |
| 5789 | # define ldr_R0 (0x18000000) |
| 5790 | # define ldr_R0_mask(i) (i & 0xbfffffe0) |
| 5791 | # define ldr_R0_x0 (0xb9400000) |
| 5792 | # define ldr_hw_R0 (0x72a00000) |
| 5793 | # define movk_R0 (0x72800000) |
| 5794 | # define movz_R0 (0x52a00000) |
| 5795 | # define movz_hw_R0 (0x52c00000) |
| 5796 | #endif |
| 5797 | |
| 5798 | /* Handle TLS relaxations. Relaxing is possible for symbols that use |
| 5799 | R_AARCH64_TLSDESC_ADR_{PAGE, LD64_LO12_NC, ADD_LO12_NC} during a static |
| 5800 | link. |
| 5801 | |
| 5802 | Return bfd_reloc_ok if we're done, bfd_reloc_continue if the caller |
| 5803 | is to then call final_link_relocate. Return other values in the |
| 5804 | case of error. */ |
| 5805 | |
| 5806 | static bfd_reloc_status_type |
| 5807 | elfNN_aarch64_tls_relax (struct elf_aarch64_link_hash_table *globals, |
| 5808 | bfd *input_bfd, bfd_byte *contents, |
| 5809 | Elf_Internal_Rela *rel, struct elf_link_hash_entry *h) |
| 5810 | { |
| 5811 | bfd_boolean is_local = h == NULL; |
| 5812 | unsigned int r_type = ELFNN_R_TYPE (rel->r_info); |
| 5813 | unsigned long insn; |
| 5814 | |
| 5815 | BFD_ASSERT (globals && input_bfd && contents && rel); |
| 5816 | |
| 5817 | switch (elfNN_aarch64_bfd_reloc_from_type (input_bfd, r_type)) |
| 5818 | { |
| 5819 | case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21: |
| 5820 | case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21: |
| 5821 | if (is_local) |
| 5822 | { |
| 5823 | /* GD->LE relaxation: |
| 5824 | adrp x0, :tlsgd:var => movz R0, :tprel_g1:var |
| 5825 | or |
| 5826 | adrp x0, :tlsdesc:var => movz R0, :tprel_g1:var |
| 5827 | |
| 5828 | Where R is x for LP64, and w for ILP32. */ |
| 5829 | bfd_putl32 (movz_R0, contents + rel->r_offset); |
| 5830 | return bfd_reloc_continue; |
| 5831 | } |
| 5832 | else |
| 5833 | { |
| 5834 | /* GD->IE relaxation: |
| 5835 | adrp x0, :tlsgd:var => adrp x0, :gottprel:var |
| 5836 | or |
| 5837 | adrp x0, :tlsdesc:var => adrp x0, :gottprel:var |
| 5838 | */ |
| 5839 | return bfd_reloc_continue; |
| 5840 | } |
| 5841 | |
| 5842 | case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21: |
| 5843 | BFD_ASSERT (0); |
| 5844 | break; |
| 5845 | |
| 5846 | case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19: |
| 5847 | if (is_local) |
| 5848 | { |
| 5849 | /* Tiny TLSDESC->LE relaxation: |
| 5850 | ldr x1, :tlsdesc:var => movz R0, #:tprel_g1:var |
| 5851 | adr x0, :tlsdesc:var => movk R0, #:tprel_g0_nc:var |
| 5852 | .tlsdesccall var |
| 5853 | blr x1 => nop |
| 5854 | |
| 5855 | Where R is x for LP64, and w for ILP32. */ |
| 5856 | BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (TLSDESC_ADR_PREL21)); |
| 5857 | BFD_ASSERT (ELFNN_R_TYPE (rel[2].r_info) == AARCH64_R (TLSDESC_CALL)); |
| 5858 | |
| 5859 | rel[1].r_info = ELFNN_R_INFO (ELFNN_R_SYM (rel->r_info), |
| 5860 | AARCH64_R (TLSLE_MOVW_TPREL_G0_NC)); |
| 5861 | rel[2].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE); |
| 5862 | |
| 5863 | bfd_putl32 (movz_R0, contents + rel->r_offset); |
| 5864 | bfd_putl32 (movk_R0, contents + rel->r_offset + 4); |
| 5865 | bfd_putl32 (INSN_NOP, contents + rel->r_offset + 8); |
| 5866 | return bfd_reloc_continue; |
| 5867 | } |
| 5868 | else |
| 5869 | { |
| 5870 | /* Tiny TLSDESC->IE relaxation: |
| 5871 | ldr x1, :tlsdesc:var => ldr x0, :gottprel:var |
| 5872 | adr x0, :tlsdesc:var => nop |
| 5873 | .tlsdesccall var |
| 5874 | blr x1 => nop |
| 5875 | */ |
| 5876 | BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (TLSDESC_ADR_PREL21)); |
| 5877 | BFD_ASSERT (ELFNN_R_TYPE (rel[2].r_info) == AARCH64_R (TLSDESC_CALL)); |
| 5878 | |
| 5879 | rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE); |
| 5880 | rel[2].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE); |
| 5881 | |
| 5882 | bfd_putl32 (ldr_R0, contents + rel->r_offset); |
| 5883 | bfd_putl32 (INSN_NOP, contents + rel->r_offset + 4); |
| 5884 | bfd_putl32 (INSN_NOP, contents + rel->r_offset + 8); |
| 5885 | return bfd_reloc_continue; |
| 5886 | } |
| 5887 | |
| 5888 | case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21: |
| 5889 | if (is_local) |
| 5890 | { |
| 5891 | /* Tiny GD->LE relaxation: |
| 5892 | adr x0, :tlsgd:var => mrs x1, tpidr_el0 |
| 5893 | bl __tls_get_addr => add R0, R1, #:tprel_hi12:x, lsl #12 |
| 5894 | nop => add R0, R0, #:tprel_lo12_nc:x |
| 5895 | |
| 5896 | Where R is x for LP64, and x for Ilp32. */ |
| 5897 | |
| 5898 | /* First kill the tls_get_addr reloc on the bl instruction. */ |
| 5899 | BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset); |
| 5900 | |
| 5901 | bfd_putl32 (0xd53bd041, contents + rel->r_offset + 0); |
| 5902 | bfd_putl32 (add_R0_R1, contents + rel->r_offset + 4); |
| 5903 | bfd_putl32 (add_R0_R0, contents + rel->r_offset + 8); |
| 5904 | |
| 5905 | rel[1].r_info = ELFNN_R_INFO (ELFNN_R_SYM (rel->r_info), |
| 5906 | AARCH64_R (TLSLE_ADD_TPREL_LO12_NC)); |
| 5907 | rel[1].r_offset = rel->r_offset + 8; |
| 5908 | |
| 5909 | /* Move the current relocation to the second instruction in |
| 5910 | the sequence. */ |
| 5911 | rel->r_offset += 4; |
| 5912 | rel->r_info = ELFNN_R_INFO (ELFNN_R_SYM (rel->r_info), |
| 5913 | AARCH64_R (TLSLE_ADD_TPREL_HI12)); |
| 5914 | return bfd_reloc_continue; |
| 5915 | } |
| 5916 | else |
| 5917 | { |
| 5918 | /* Tiny GD->IE relaxation: |
| 5919 | adr x0, :tlsgd:var => ldr R0, :gottprel:var |
| 5920 | bl __tls_get_addr => mrs x1, tpidr_el0 |
| 5921 | nop => add R0, R0, R1 |
| 5922 | |
| 5923 | Where R is x for LP64, and w for Ilp32. */ |
| 5924 | |
| 5925 | /* First kill the tls_get_addr reloc on the bl instruction. */ |
| 5926 | BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset); |
| 5927 | rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE); |
| 5928 | |
| 5929 | bfd_putl32 (ldr_R0, contents + rel->r_offset); |
| 5930 | bfd_putl32 (0xd53bd041, contents + rel->r_offset + 4); |
| 5931 | bfd_putl32 (add_R0_R0_R1, contents + rel->r_offset + 8); |
| 5932 | return bfd_reloc_continue; |
| 5933 | } |
| 5934 | |
| 5935 | #if ARCH_SIZE == 64 |
| 5936 | case BFD_RELOC_AARCH64_TLSGD_MOVW_G1: |
| 5937 | BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (TLSGD_MOVW_G0_NC)); |
| 5938 | BFD_ASSERT (rel->r_offset + 12 == rel[2].r_offset); |
| 5939 | BFD_ASSERT (ELFNN_R_TYPE (rel[2].r_info) == AARCH64_R (CALL26)); |
| 5940 | |
| 5941 | if (is_local) |
| 5942 | { |
| 5943 | /* Large GD->LE relaxation: |
| 5944 | movz x0, #:tlsgd_g1:var => movz x0, #:tprel_g2:var, lsl #32 |
| 5945 | movk x0, #:tlsgd_g0_nc:var => movk x0, #:tprel_g1_nc:var, lsl #16 |
| 5946 | add x0, gp, x0 => movk x0, #:tprel_g0_nc:var |
| 5947 | bl __tls_get_addr => mrs x1, tpidr_el0 |
| 5948 | nop => add x0, x0, x1 |
| 5949 | */ |
| 5950 | rel[2].r_info = ELFNN_R_INFO (ELFNN_R_SYM (rel->r_info), |
| 5951 | AARCH64_R (TLSLE_MOVW_TPREL_G0_NC)); |
| 5952 | rel[2].r_offset = rel->r_offset + 8; |
| 5953 | |
| 5954 | bfd_putl32 (movz_hw_R0, contents + rel->r_offset + 0); |
| 5955 | bfd_putl32 (ldr_hw_R0, contents + rel->r_offset + 4); |
| 5956 | bfd_putl32 (movk_R0, contents + rel->r_offset + 8); |
| 5957 | bfd_putl32 (0xd53bd041, contents + rel->r_offset + 12); |
| 5958 | bfd_putl32 (add_R0_R0_R1, contents + rel->r_offset + 16); |
| 5959 | } |
| 5960 | else |
| 5961 | { |
| 5962 | /* Large GD->IE relaxation: |
| 5963 | movz x0, #:tlsgd_g1:var => movz x0, #:gottprel_g1:var, lsl #16 |
| 5964 | movk x0, #:tlsgd_g0_nc:var => movk x0, #:gottprel_g0_nc:var |
| 5965 | add x0, gp, x0 => ldr x0, [gp, x0] |
| 5966 | bl __tls_get_addr => mrs x1, tpidr_el0 |
| 5967 | nop => add x0, x0, x1 |
| 5968 | */ |
| 5969 | rel[2].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE); |
| 5970 | bfd_putl32 (0xd2a80000, contents + rel->r_offset + 0); |
| 5971 | bfd_putl32 (ldr_R0, contents + rel->r_offset + 8); |
| 5972 | bfd_putl32 (0xd53bd041, contents + rel->r_offset + 12); |
| 5973 | bfd_putl32 (add_R0_R0_R1, contents + rel->r_offset + 16); |
| 5974 | } |
| 5975 | return bfd_reloc_continue; |
| 5976 | |
| 5977 | case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC: |
| 5978 | return bfd_reloc_continue; |
| 5979 | #endif |
| 5980 | |
| 5981 | case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19: |
| 5982 | return bfd_reloc_continue; |
| 5983 | |
| 5984 | case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC: |
| 5985 | if (is_local) |
| 5986 | { |
| 5987 | /* GD->LE relaxation: |
| 5988 | ldr xd, [x0, #:tlsdesc_lo12:var] => movk x0, :tprel_g0_nc:var |
| 5989 | |
| 5990 | Where R is x for lp64 mode, and w for ILP32 mode. */ |
| 5991 | bfd_putl32 (movk_R0, contents + rel->r_offset); |
| 5992 | return bfd_reloc_continue; |
| 5993 | } |
| 5994 | else |
| 5995 | { |
| 5996 | /* GD->IE relaxation: |
| 5997 | ldr xd, [x0, #:tlsdesc_lo12:var] => ldr R0, [x0, #:gottprel_lo12:var] |
| 5998 | |
| 5999 | Where R is x for lp64 mode, and w for ILP32 mode. */ |
| 6000 | insn = bfd_getl32 (contents + rel->r_offset); |
| 6001 | bfd_putl32 (ldr_R0_mask (insn), contents + rel->r_offset); |
| 6002 | return bfd_reloc_continue; |
| 6003 | } |
| 6004 | |
| 6005 | case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC: |
| 6006 | if (is_local) |
| 6007 | { |
| 6008 | /* GD->LE relaxation |
| 6009 | add x0, #:tlsgd_lo12:var => movk R0, :tprel_g0_nc:var |
| 6010 | bl __tls_get_addr => mrs x1, tpidr_el0 |
| 6011 | nop => add R0, R1, R0 |
| 6012 | |
| 6013 | Where R is x for lp64 mode, and w for ILP32 mode. */ |
| 6014 | |
| 6015 | /* First kill the tls_get_addr reloc on the bl instruction. */ |
| 6016 | BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset); |
| 6017 | rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE); |
| 6018 | |
| 6019 | bfd_putl32 (movk_R0, contents + rel->r_offset); |
| 6020 | bfd_putl32 (0xd53bd041, contents + rel->r_offset + 4); |
| 6021 | bfd_putl32 (add_R0_R0_R1, contents + rel->r_offset + 8); |
| 6022 | return bfd_reloc_continue; |
| 6023 | } |
| 6024 | else |
| 6025 | { |
| 6026 | /* GD->IE relaxation |
| 6027 | ADD x0, #:tlsgd_lo12:var => ldr R0, [x0, #:gottprel_lo12:var] |
| 6028 | BL __tls_get_addr => mrs x1, tpidr_el0 |
| 6029 | R_AARCH64_CALL26 |
| 6030 | NOP => add R0, R1, R0 |
| 6031 | |
| 6032 | Where R is x for lp64 mode, and w for ilp32 mode. */ |
| 6033 | |
| 6034 | BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (CALL26)); |
| 6035 | |
| 6036 | /* Remove the relocation on the BL instruction. */ |
| 6037 | rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE); |
| 6038 | |
| 6039 | /* We choose to fixup the BL and NOP instructions using the |
| 6040 | offset from the second relocation to allow flexibility in |
| 6041 | scheduling instructions between the ADD and BL. */ |
| 6042 | bfd_putl32 (ldr_R0_x0, contents + rel->r_offset); |
| 6043 | bfd_putl32 (0xd53bd041, contents + rel[1].r_offset); |
| 6044 | bfd_putl32 (add_R0_R0_R1, contents + rel[1].r_offset + 4); |
| 6045 | return bfd_reloc_continue; |
| 6046 | } |
| 6047 | |
| 6048 | case BFD_RELOC_AARCH64_TLSDESC_ADD: |
| 6049 | case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12: |
| 6050 | case BFD_RELOC_AARCH64_TLSDESC_CALL: |
| 6051 | /* GD->IE/LE relaxation: |
| 6052 | add x0, x0, #:tlsdesc_lo12:var => nop |
| 6053 | blr xd => nop |
| 6054 | */ |
| 6055 | bfd_putl32 (INSN_NOP, contents + rel->r_offset); |
| 6056 | return bfd_reloc_ok; |
| 6057 | |
| 6058 | case BFD_RELOC_AARCH64_TLSDESC_LDR: |
| 6059 | if (is_local) |
| 6060 | { |
| 6061 | /* GD->LE relaxation: |
| 6062 | ldr xd, [gp, xn] => movk R0, #:tprel_g0_nc:var |
| 6063 | |
| 6064 | Where R is x for lp64 mode, and w for ILP32 mode. */ |
| 6065 | bfd_putl32 (movk_R0, contents + rel->r_offset); |
| 6066 | return bfd_reloc_continue; |
| 6067 | } |
| 6068 | else |
| 6069 | { |
| 6070 | /* GD->IE relaxation: |
| 6071 | ldr xd, [gp, xn] => ldr R0, [gp, xn] |
| 6072 | |
| 6073 | Where R is x for lp64 mode, and w for ILP32 mode. */ |
| 6074 | insn = bfd_getl32 (contents + rel->r_offset); |
| 6075 | bfd_putl32 (ldr_R0_mask (insn), contents + rel->r_offset); |
| 6076 | return bfd_reloc_ok; |
| 6077 | } |
| 6078 | |
| 6079 | case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC: |
| 6080 | /* GD->LE relaxation: |
| 6081 | movk xd, #:tlsdesc_off_g0_nc:var => movk R0, #:tprel_g1_nc:var, lsl #16 |
| 6082 | GD->IE relaxation: |
| 6083 | movk xd, #:tlsdesc_off_g0_nc:var => movk Rd, #:gottprel_g0_nc:var |
| 6084 | |
| 6085 | Where R is x for lp64 mode, and w for ILP32 mode. */ |
| 6086 | if (is_local) |
| 6087 | bfd_putl32 (ldr_hw_R0, contents + rel->r_offset); |
| 6088 | return bfd_reloc_continue; |
| 6089 | |
| 6090 | case BFD_RELOC_AARCH64_TLSDESC_OFF_G1: |
| 6091 | if (is_local) |
| 6092 | { |
| 6093 | /* GD->LE relaxation: |
| 6094 | movz xd, #:tlsdesc_off_g1:var => movz R0, #:tprel_g2:var, lsl #32 |
| 6095 | |
| 6096 | Where R is x for lp64 mode, and w for ILP32 mode. */ |
| 6097 | bfd_putl32 (movz_hw_R0, contents + rel->r_offset); |
| 6098 | return bfd_reloc_continue; |
| 6099 | } |
| 6100 | else |
| 6101 | { |
| 6102 | /* GD->IE relaxation: |
| 6103 | movz xd, #:tlsdesc_off_g1:var => movz Rd, #:gottprel_g1:var, lsl #16 |
| 6104 | |
| 6105 | Where R is x for lp64 mode, and w for ILP32 mode. */ |
| 6106 | insn = bfd_getl32 (contents + rel->r_offset); |
| 6107 | bfd_putl32 (movz_R0 | (insn & 0x1f), contents + rel->r_offset); |
| 6108 | return bfd_reloc_continue; |
| 6109 | } |
| 6110 | |
| 6111 | case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: |
| 6112 | /* IE->LE relaxation: |
| 6113 | adrp xd, :gottprel:var => movz Rd, :tprel_g1:var |
| 6114 | |
| 6115 | Where R is x for lp64 mode, and w for ILP32 mode. */ |
| 6116 | if (is_local) |
| 6117 | { |
| 6118 | insn = bfd_getl32 (contents + rel->r_offset); |
| 6119 | bfd_putl32 (movz_R0 | (insn & 0x1f), contents + rel->r_offset); |
| 6120 | } |
| 6121 | return bfd_reloc_continue; |
| 6122 | |
| 6123 | case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC: |
| 6124 | /* IE->LE relaxation: |
| 6125 | ldr xd, [xm, #:gottprel_lo12:var] => movk Rd, :tprel_g0_nc:var |
| 6126 | |
| 6127 | Where R is x for lp64 mode, and w for ILP32 mode. */ |
| 6128 | if (is_local) |
| 6129 | { |
| 6130 | insn = bfd_getl32 (contents + rel->r_offset); |
| 6131 | bfd_putl32 (movk_R0 | (insn & 0x1f), contents + rel->r_offset); |
| 6132 | } |
| 6133 | return bfd_reloc_continue; |
| 6134 | |
| 6135 | case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21: |
| 6136 | /* LD->LE relaxation (tiny): |
| 6137 | adr x0, :tlsldm:x => mrs x0, tpidr_el0 |
| 6138 | bl __tls_get_addr => add R0, R0, TCB_SIZE |
| 6139 | |
| 6140 | Where R is x for lp64 mode, and w for ilp32 mode. */ |
| 6141 | if (is_local) |
| 6142 | { |
| 6143 | BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset); |
| 6144 | BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (CALL26)); |
| 6145 | /* No need of CALL26 relocation for tls_get_addr. */ |
| 6146 | rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE); |
| 6147 | bfd_putl32 (0xd53bd040, contents + rel->r_offset + 0); |
| 6148 | bfd_putl32 (add_R0_R0 | (TCB_SIZE << 10), |
| 6149 | contents + rel->r_offset + 4); |
| 6150 | return bfd_reloc_ok; |
| 6151 | } |
| 6152 | return bfd_reloc_continue; |
| 6153 | |
| 6154 | case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21: |
| 6155 | /* LD->LE relaxation (small): |
| 6156 | adrp x0, :tlsldm:x => mrs x0, tpidr_el0 |
| 6157 | */ |
| 6158 | if (is_local) |
| 6159 | { |
| 6160 | bfd_putl32 (0xd53bd040, contents + rel->r_offset); |
| 6161 | return bfd_reloc_ok; |
| 6162 | } |
| 6163 | return bfd_reloc_continue; |
| 6164 | |
| 6165 | case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC: |
| 6166 | /* LD->LE relaxation (small): |
| 6167 | add x0, #:tlsldm_lo12:x => add R0, R0, TCB_SIZE |
| 6168 | bl __tls_get_addr => nop |
| 6169 | |
| 6170 | Where R is x for lp64 mode, and w for ilp32 mode. */ |
| 6171 | if (is_local) |
| 6172 | { |
| 6173 | BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset); |
| 6174 | BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (CALL26)); |
| 6175 | /* No need of CALL26 relocation for tls_get_addr. */ |
| 6176 | rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE); |
| 6177 | bfd_putl32 (add_R0_R0 | (TCB_SIZE << 10), |
| 6178 | contents + rel->r_offset + 0); |
| 6179 | bfd_putl32 (INSN_NOP, contents + rel->r_offset + 4); |
| 6180 | return bfd_reloc_ok; |
| 6181 | } |
| 6182 | return bfd_reloc_continue; |
| 6183 | |
| 6184 | default: |
| 6185 | return bfd_reloc_continue; |
| 6186 | } |
| 6187 | |
| 6188 | return bfd_reloc_ok; |
| 6189 | } |
| 6190 | |
| 6191 | /* Relocate an AArch64 ELF section. */ |
| 6192 | |
| 6193 | static bfd_boolean |
| 6194 | elfNN_aarch64_relocate_section (bfd *output_bfd, |
| 6195 | struct bfd_link_info *info, |
| 6196 | bfd *input_bfd, |
| 6197 | asection *input_section, |
| 6198 | bfd_byte *contents, |
| 6199 | Elf_Internal_Rela *relocs, |
| 6200 | Elf_Internal_Sym *local_syms, |
| 6201 | asection **local_sections) |
| 6202 | { |
| 6203 | Elf_Internal_Shdr *symtab_hdr; |
| 6204 | struct elf_link_hash_entry **sym_hashes; |
| 6205 | Elf_Internal_Rela *rel; |
| 6206 | Elf_Internal_Rela *relend; |
| 6207 | const char *name; |
| 6208 | struct elf_aarch64_link_hash_table *globals; |
| 6209 | bfd_boolean save_addend = FALSE; |
| 6210 | bfd_vma addend = 0; |
| 6211 | |
| 6212 | globals = elf_aarch64_hash_table (info); |
| 6213 | |
| 6214 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
| 6215 | sym_hashes = elf_sym_hashes (input_bfd); |
| 6216 | |
| 6217 | rel = relocs; |
| 6218 | relend = relocs + input_section->reloc_count; |
| 6219 | for (; rel < relend; rel++) |
| 6220 | { |
| 6221 | unsigned int r_type; |
| 6222 | bfd_reloc_code_real_type bfd_r_type; |
| 6223 | bfd_reloc_code_real_type relaxed_bfd_r_type; |
| 6224 | reloc_howto_type *howto; |
| 6225 | unsigned long r_symndx; |
| 6226 | Elf_Internal_Sym *sym; |
| 6227 | asection *sec; |
| 6228 | struct elf_link_hash_entry *h; |
| 6229 | bfd_vma relocation; |
| 6230 | bfd_reloc_status_type r; |
| 6231 | arelent bfd_reloc; |
| 6232 | char sym_type; |
| 6233 | bfd_boolean unresolved_reloc = FALSE; |
| 6234 | char *error_message = NULL; |
| 6235 | |
| 6236 | r_symndx = ELFNN_R_SYM (rel->r_info); |
| 6237 | r_type = ELFNN_R_TYPE (rel->r_info); |
| 6238 | |
| 6239 | bfd_reloc.howto = elfNN_aarch64_howto_from_type (input_bfd, r_type); |
| 6240 | howto = bfd_reloc.howto; |
| 6241 | |
| 6242 | if (howto == NULL) |
| 6243 | return _bfd_unrecognized_reloc (input_bfd, input_section, r_type); |
| 6244 | |
| 6245 | bfd_r_type = elfNN_aarch64_bfd_reloc_from_howto (howto); |
| 6246 | |
| 6247 | h = NULL; |
| 6248 | sym = NULL; |
| 6249 | sec = NULL; |
| 6250 | |
| 6251 | if (r_symndx < symtab_hdr->sh_info) |
| 6252 | { |
| 6253 | sym = local_syms + r_symndx; |
| 6254 | sym_type = ELFNN_ST_TYPE (sym->st_info); |
| 6255 | sec = local_sections[r_symndx]; |
| 6256 | |
| 6257 | /* An object file might have a reference to a local |
| 6258 | undefined symbol. This is a daft object file, but we |
| 6259 | should at least do something about it. */ |
| 6260 | if (r_type != R_AARCH64_NONE && r_type != R_AARCH64_NULL |
| 6261 | && bfd_is_und_section (sec) |
| 6262 | && ELF_ST_BIND (sym->st_info) != STB_WEAK) |
| 6263 | (*info->callbacks->undefined_symbol) |
| 6264 | (info, bfd_elf_string_from_elf_section |
| 6265 | (input_bfd, symtab_hdr->sh_link, sym->st_name), |
| 6266 | input_bfd, input_section, rel->r_offset, TRUE); |
| 6267 | |
| 6268 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
| 6269 | |
| 6270 | /* Relocate against local STT_GNU_IFUNC symbol. */ |
| 6271 | if (!bfd_link_relocatable (info) |
| 6272 | && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
| 6273 | { |
| 6274 | h = elfNN_aarch64_get_local_sym_hash (globals, input_bfd, |
| 6275 | rel, FALSE); |
| 6276 | if (h == NULL) |
| 6277 | abort (); |
| 6278 | |
| 6279 | /* Set STT_GNU_IFUNC symbol value. */ |
| 6280 | h->root.u.def.value = sym->st_value; |
| 6281 | h->root.u.def.section = sec; |
| 6282 | } |
| 6283 | } |
| 6284 | else |
| 6285 | { |
| 6286 | bfd_boolean warned, ignored; |
| 6287 | |
| 6288 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
| 6289 | r_symndx, symtab_hdr, sym_hashes, |
| 6290 | h, sec, relocation, |
| 6291 | unresolved_reloc, warned, ignored); |
| 6292 | |
| 6293 | sym_type = h->type; |
| 6294 | } |
| 6295 | |
| 6296 | if (sec != NULL && discarded_section (sec)) |
| 6297 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
| 6298 | rel, 1, relend, howto, 0, contents); |
| 6299 | |
| 6300 | if (bfd_link_relocatable (info)) |
| 6301 | continue; |
| 6302 | |
| 6303 | if (h != NULL) |
| 6304 | name = h->root.root.string; |
| 6305 | else |
| 6306 | { |
| 6307 | name = (bfd_elf_string_from_elf_section |
| 6308 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); |
| 6309 | if (name == NULL || *name == '\0') |
| 6310 | name = bfd_section_name (input_bfd, sec); |
| 6311 | } |
| 6312 | |
| 6313 | if (r_symndx != 0 |
| 6314 | && r_type != R_AARCH64_NONE |
| 6315 | && r_type != R_AARCH64_NULL |
| 6316 | && (h == NULL |
| 6317 | || h->root.type == bfd_link_hash_defined |
| 6318 | || h->root.type == bfd_link_hash_defweak) |
| 6319 | && IS_AARCH64_TLS_RELOC (bfd_r_type) != (sym_type == STT_TLS)) |
| 6320 | { |
| 6321 | _bfd_error_handler |
| 6322 | ((sym_type == STT_TLS |
| 6323 | /* xgettext:c-format */ |
| 6324 | ? _("%pB(%pA+%#" PRIx64 "): %s used with TLS symbol %s") |
| 6325 | /* xgettext:c-format */ |
| 6326 | : _("%pB(%pA+%#" PRIx64 "): %s used with non-TLS symbol %s")), |
| 6327 | input_bfd, |
| 6328 | input_section, (uint64_t) rel->r_offset, howto->name, name); |
| 6329 | } |
| 6330 | |
| 6331 | /* We relax only if we can see that there can be a valid transition |
| 6332 | from a reloc type to another. |
| 6333 | We call elfNN_aarch64_final_link_relocate unless we're completely |
| 6334 | done, i.e., the relaxation produced the final output we want. */ |
| 6335 | |
| 6336 | relaxed_bfd_r_type = aarch64_tls_transition (input_bfd, info, r_type, |
| 6337 | h, r_symndx); |
| 6338 | if (relaxed_bfd_r_type != bfd_r_type) |
| 6339 | { |
| 6340 | bfd_r_type = relaxed_bfd_r_type; |
| 6341 | howto = elfNN_aarch64_howto_from_bfd_reloc (bfd_r_type); |
| 6342 | BFD_ASSERT (howto != NULL); |
| 6343 | r_type = howto->type; |
| 6344 | r = elfNN_aarch64_tls_relax (globals, input_bfd, contents, rel, h); |
| 6345 | unresolved_reloc = 0; |
| 6346 | } |
| 6347 | else |
| 6348 | r = bfd_reloc_continue; |
| 6349 | |
| 6350 | /* There may be multiple consecutive relocations for the |
| 6351 | same offset. In that case we are supposed to treat the |
| 6352 | output of each relocation as the addend for the next. */ |
| 6353 | if (rel + 1 < relend |
| 6354 | && rel->r_offset == rel[1].r_offset |
| 6355 | && ELFNN_R_TYPE (rel[1].r_info) != R_AARCH64_NONE |
| 6356 | && ELFNN_R_TYPE (rel[1].r_info) != R_AARCH64_NULL) |
| 6357 | save_addend = TRUE; |
| 6358 | else |
| 6359 | save_addend = FALSE; |
| 6360 | |
| 6361 | if (r == bfd_reloc_continue) |
| 6362 | r = elfNN_aarch64_final_link_relocate (howto, input_bfd, output_bfd, |
| 6363 | input_section, contents, rel, |
| 6364 | relocation, info, sec, |
| 6365 | h, &unresolved_reloc, |
| 6366 | save_addend, &addend, sym); |
| 6367 | |
| 6368 | switch (elfNN_aarch64_bfd_reloc_from_type (input_bfd, r_type)) |
| 6369 | { |
| 6370 | case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC: |
| 6371 | case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21: |
| 6372 | case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21: |
| 6373 | case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC: |
| 6374 | case BFD_RELOC_AARCH64_TLSGD_MOVW_G1: |
| 6375 | case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC: |
| 6376 | case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21: |
| 6377 | case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21: |
| 6378 | if (! symbol_got_offset_mark_p (input_bfd, h, r_symndx)) |
| 6379 | { |
| 6380 | bfd_boolean need_relocs = FALSE; |
| 6381 | bfd_byte *loc; |
| 6382 | int indx; |
| 6383 | bfd_vma off; |
| 6384 | |
| 6385 | off = symbol_got_offset (input_bfd, h, r_symndx); |
| 6386 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
| 6387 | |
| 6388 | need_relocs = |
| 6389 | (!bfd_link_executable (info) || indx != 0) && |
| 6390 | (h == NULL |
| 6391 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 6392 | || h->root.type != bfd_link_hash_undefweak); |
| 6393 | |
| 6394 | BFD_ASSERT (globals->root.srelgot != NULL); |
| 6395 | |
| 6396 | if (need_relocs) |
| 6397 | { |
| 6398 | Elf_Internal_Rela rela; |
| 6399 | rela.r_info = ELFNN_R_INFO (indx, AARCH64_R (TLS_DTPMOD)); |
| 6400 | rela.r_addend = 0; |
| 6401 | rela.r_offset = globals->root.sgot->output_section->vma + |
| 6402 | globals->root.sgot->output_offset + off; |
| 6403 | |
| 6404 | |
| 6405 | loc = globals->root.srelgot->contents; |
| 6406 | loc += globals->root.srelgot->reloc_count++ |
| 6407 | * RELOC_SIZE (htab); |
| 6408 | bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc); |
| 6409 | |
| 6410 | bfd_reloc_code_real_type real_type = |
| 6411 | elfNN_aarch64_bfd_reloc_from_type (input_bfd, r_type); |
| 6412 | |
| 6413 | if (real_type == BFD_RELOC_AARCH64_TLSLD_ADR_PREL21 |
| 6414 | || real_type == BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21 |
| 6415 | || real_type == BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC) |
| 6416 | { |
| 6417 | /* For local dynamic, don't generate DTPREL in any case. |
| 6418 | Initialize the DTPREL slot into zero, so we get module |
| 6419 | base address when invoke runtime TLS resolver. */ |
| 6420 | bfd_put_NN (output_bfd, 0, |
| 6421 | globals->root.sgot->contents + off |
| 6422 | + GOT_ENTRY_SIZE); |
| 6423 | } |
| 6424 | else if (indx == 0) |
| 6425 | { |
| 6426 | bfd_put_NN (output_bfd, |
| 6427 | relocation - dtpoff_base (info), |
| 6428 | globals->root.sgot->contents + off |
| 6429 | + GOT_ENTRY_SIZE); |
| 6430 | } |
| 6431 | else |
| 6432 | { |
| 6433 | /* This TLS symbol is global. We emit a |
| 6434 | relocation to fixup the tls offset at load |
| 6435 | time. */ |
| 6436 | rela.r_info = |
| 6437 | ELFNN_R_INFO (indx, AARCH64_R (TLS_DTPREL)); |
| 6438 | rela.r_addend = 0; |
| 6439 | rela.r_offset = |
| 6440 | (globals->root.sgot->output_section->vma |
| 6441 | + globals->root.sgot->output_offset + off |
| 6442 | + GOT_ENTRY_SIZE); |
| 6443 | |
| 6444 | loc = globals->root.srelgot->contents; |
| 6445 | loc += globals->root.srelgot->reloc_count++ |
| 6446 | * RELOC_SIZE (globals); |
| 6447 | bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc); |
| 6448 | bfd_put_NN (output_bfd, (bfd_vma) 0, |
| 6449 | globals->root.sgot->contents + off |
| 6450 | + GOT_ENTRY_SIZE); |
| 6451 | } |
| 6452 | } |
| 6453 | else |
| 6454 | { |
| 6455 | bfd_put_NN (output_bfd, (bfd_vma) 1, |
| 6456 | globals->root.sgot->contents + off); |
| 6457 | bfd_put_NN (output_bfd, |
| 6458 | relocation - dtpoff_base (info), |
| 6459 | globals->root.sgot->contents + off |
| 6460 | + GOT_ENTRY_SIZE); |
| 6461 | } |
| 6462 | |
| 6463 | symbol_got_offset_mark (input_bfd, h, r_symndx); |
| 6464 | } |
| 6465 | break; |
| 6466 | |
| 6467 | case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: |
| 6468 | case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC: |
| 6469 | case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19: |
| 6470 | case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC: |
| 6471 | case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1: |
| 6472 | if (! symbol_got_offset_mark_p (input_bfd, h, r_symndx)) |
| 6473 | { |
| 6474 | bfd_boolean need_relocs = FALSE; |
| 6475 | bfd_byte *loc; |
| 6476 | int indx; |
| 6477 | bfd_vma off; |
| 6478 | |
| 6479 | off = symbol_got_offset (input_bfd, h, r_symndx); |
| 6480 | |
| 6481 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
| 6482 | |
| 6483 | need_relocs = |
| 6484 | (!bfd_link_executable (info) || indx != 0) && |
| 6485 | (h == NULL |
| 6486 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 6487 | || h->root.type != bfd_link_hash_undefweak); |
| 6488 | |
| 6489 | BFD_ASSERT (globals->root.srelgot != NULL); |
| 6490 | |
| 6491 | if (need_relocs) |
| 6492 | { |
| 6493 | Elf_Internal_Rela rela; |
| 6494 | |
| 6495 | if (indx == 0) |
| 6496 | rela.r_addend = relocation - dtpoff_base (info); |
| 6497 | else |
| 6498 | rela.r_addend = 0; |
| 6499 | |
| 6500 | rela.r_info = ELFNN_R_INFO (indx, AARCH64_R (TLS_TPREL)); |
| 6501 | rela.r_offset = globals->root.sgot->output_section->vma + |
| 6502 | globals->root.sgot->output_offset + off; |
| 6503 | |
| 6504 | loc = globals->root.srelgot->contents; |
| 6505 | loc += globals->root.srelgot->reloc_count++ |
| 6506 | * RELOC_SIZE (htab); |
| 6507 | |
| 6508 | bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc); |
| 6509 | |
| 6510 | bfd_put_NN (output_bfd, rela.r_addend, |
| 6511 | globals->root.sgot->contents + off); |
| 6512 | } |
| 6513 | else |
| 6514 | bfd_put_NN (output_bfd, relocation - tpoff_base (info), |
| 6515 | globals->root.sgot->contents + off); |
| 6516 | |
| 6517 | symbol_got_offset_mark (input_bfd, h, r_symndx); |
| 6518 | } |
| 6519 | break; |
| 6520 | |
| 6521 | case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12: |
| 6522 | case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21: |
| 6523 | case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21: |
| 6524 | case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC: |
| 6525 | case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19: |
| 6526 | case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC: |
| 6527 | case BFD_RELOC_AARCH64_TLSDESC_OFF_G1: |
| 6528 | if (! symbol_tlsdesc_got_offset_mark_p (input_bfd, h, r_symndx)) |
| 6529 | { |
| 6530 | bfd_boolean need_relocs = FALSE; |
| 6531 | int indx = h && h->dynindx != -1 ? h->dynindx : 0; |
| 6532 | bfd_vma off = symbol_tlsdesc_got_offset (input_bfd, h, r_symndx); |
| 6533 | |
| 6534 | need_relocs = (h == NULL |
| 6535 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 6536 | || h->root.type != bfd_link_hash_undefweak); |
| 6537 | |
| 6538 | BFD_ASSERT (globals->root.srelgot != NULL); |
| 6539 | BFD_ASSERT (globals->root.sgot != NULL); |
| 6540 | |
| 6541 | if (need_relocs) |
| 6542 | { |
| 6543 | bfd_byte *loc; |
| 6544 | Elf_Internal_Rela rela; |
| 6545 | rela.r_info = ELFNN_R_INFO (indx, AARCH64_R (TLSDESC)); |
| 6546 | |
| 6547 | rela.r_addend = 0; |
| 6548 | rela.r_offset = (globals->root.sgotplt->output_section->vma |
| 6549 | + globals->root.sgotplt->output_offset |
| 6550 | + off + globals->sgotplt_jump_table_size); |
| 6551 | |
| 6552 | if (indx == 0) |
| 6553 | rela.r_addend = relocation - dtpoff_base (info); |
| 6554 | |
| 6555 | /* Allocate the next available slot in the PLT reloc |
| 6556 | section to hold our R_AARCH64_TLSDESC, the next |
| 6557 | available slot is determined from reloc_count, |
| 6558 | which we step. But note, reloc_count was |
| 6559 | artifically moved down while allocating slots for |
| 6560 | real PLT relocs such that all of the PLT relocs |
| 6561 | will fit above the initial reloc_count and the |
| 6562 | extra stuff will fit below. */ |
| 6563 | loc = globals->root.srelplt->contents; |
| 6564 | loc += globals->root.srelplt->reloc_count++ |
| 6565 | * RELOC_SIZE (globals); |
| 6566 | |
| 6567 | bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc); |
| 6568 | |
| 6569 | bfd_put_NN (output_bfd, (bfd_vma) 0, |
| 6570 | globals->root.sgotplt->contents + off + |
| 6571 | globals->sgotplt_jump_table_size); |
| 6572 | bfd_put_NN (output_bfd, (bfd_vma) 0, |
| 6573 | globals->root.sgotplt->contents + off + |
| 6574 | globals->sgotplt_jump_table_size + |
| 6575 | GOT_ENTRY_SIZE); |
| 6576 | } |
| 6577 | |
| 6578 | symbol_tlsdesc_got_offset_mark (input_bfd, h, r_symndx); |
| 6579 | } |
| 6580 | break; |
| 6581 | default: |
| 6582 | break; |
| 6583 | } |
| 6584 | |
| 6585 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
| 6586 | because such sections are not SEC_ALLOC and thus ld.so will |
| 6587 | not process them. */ |
| 6588 | if (unresolved_reloc |
| 6589 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
| 6590 | && h->def_dynamic) |
| 6591 | && _bfd_elf_section_offset (output_bfd, info, input_section, |
| 6592 | +rel->r_offset) != (bfd_vma) - 1) |
| 6593 | { |
| 6594 | _bfd_error_handler |
| 6595 | /* xgettext:c-format */ |
| 6596 | (_("%pB(%pA+%#" PRIx64 "): " |
| 6597 | "unresolvable %s relocation against symbol `%s'"), |
| 6598 | input_bfd, input_section, (uint64_t) rel->r_offset, howto->name, |
| 6599 | h->root.root.string); |
| 6600 | return FALSE; |
| 6601 | } |
| 6602 | |
| 6603 | if (r != bfd_reloc_ok && r != bfd_reloc_continue) |
| 6604 | { |
| 6605 | bfd_reloc_code_real_type real_r_type |
| 6606 | = elfNN_aarch64_bfd_reloc_from_type (input_bfd, r_type); |
| 6607 | |
| 6608 | switch (r) |
| 6609 | { |
| 6610 | case bfd_reloc_overflow: |
| 6611 | (*info->callbacks->reloc_overflow) |
| 6612 | (info, (h ? &h->root : NULL), name, howto->name, (bfd_vma) 0, |
| 6613 | input_bfd, input_section, rel->r_offset); |
| 6614 | if (real_r_type == BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15 |
| 6615 | || real_r_type == BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14) |
| 6616 | { |
| 6617 | (*info->callbacks->warning) |
| 6618 | (info, |
| 6619 | _("too many GOT entries for -fpic, " |
| 6620 | "please recompile with -fPIC"), |
| 6621 | name, input_bfd, input_section, rel->r_offset); |
| 6622 | return FALSE; |
| 6623 | } |
| 6624 | /* Overflow can occur when a variable is referenced with a type |
| 6625 | that has a larger alignment than the type with which it was |
| 6626 | declared. eg: |
| 6627 | file1.c: extern int foo; int a (void) { return foo; } |
| 6628 | file2.c: char bar, foo, baz; |
| 6629 | If the variable is placed into a data section at an offset |
| 6630 | that is incompatible with the larger alignment requirement |
| 6631 | overflow will occur. (Strictly speaking this is not overflow |
| 6632 | but rather an alignment problem, but the bfd_reloc_ error |
| 6633 | enum does not have a value to cover that situation). |
| 6634 | |
| 6635 | Try to catch this situation here and provide a more helpful |
| 6636 | error message to the user. */ |
| 6637 | if (addend & ((1 << howto->rightshift) - 1) |
| 6638 | /* FIXME: Are we testing all of the appropriate reloc |
| 6639 | types here ? */ |
| 6640 | && (real_r_type == BFD_RELOC_AARCH64_LD_LO19_PCREL |
| 6641 | || real_r_type == BFD_RELOC_AARCH64_LDST16_LO12 |
| 6642 | || real_r_type == BFD_RELOC_AARCH64_LDST32_LO12 |
| 6643 | || real_r_type == BFD_RELOC_AARCH64_LDST64_LO12 |
| 6644 | || real_r_type == BFD_RELOC_AARCH64_LDST128_LO12)) |
| 6645 | { |
| 6646 | info->callbacks->warning |
| 6647 | (info, _("one possible cause of this error is that the \ |
| 6648 | symbol is being referenced in the indicated code as if it had a larger \ |
| 6649 | alignment than was declared where it was defined"), |
| 6650 | name, input_bfd, input_section, rel->r_offset); |
| 6651 | } |
| 6652 | break; |
| 6653 | |
| 6654 | case bfd_reloc_undefined: |
| 6655 | (*info->callbacks->undefined_symbol) |
| 6656 | (info, name, input_bfd, input_section, rel->r_offset, TRUE); |
| 6657 | break; |
| 6658 | |
| 6659 | case bfd_reloc_outofrange: |
| 6660 | error_message = _("out of range"); |
| 6661 | goto common_error; |
| 6662 | |
| 6663 | case bfd_reloc_notsupported: |
| 6664 | error_message = _("unsupported relocation"); |
| 6665 | goto common_error; |
| 6666 | |
| 6667 | case bfd_reloc_dangerous: |
| 6668 | /* error_message should already be set. */ |
| 6669 | goto common_error; |
| 6670 | |
| 6671 | default: |
| 6672 | error_message = _("unknown error"); |
| 6673 | /* Fall through. */ |
| 6674 | |
| 6675 | common_error: |
| 6676 | BFD_ASSERT (error_message != NULL); |
| 6677 | (*info->callbacks->reloc_dangerous) |
| 6678 | (info, error_message, input_bfd, input_section, rel->r_offset); |
| 6679 | break; |
| 6680 | } |
| 6681 | } |
| 6682 | |
| 6683 | if (!save_addend) |
| 6684 | addend = 0; |
| 6685 | } |
| 6686 | |
| 6687 | return TRUE; |
| 6688 | } |
| 6689 | |
| 6690 | /* Set the right machine number. */ |
| 6691 | |
| 6692 | static bfd_boolean |
| 6693 | elfNN_aarch64_object_p (bfd *abfd) |
| 6694 | { |
| 6695 | #if ARCH_SIZE == 32 |
| 6696 | bfd_default_set_arch_mach (abfd, bfd_arch_aarch64, bfd_mach_aarch64_ilp32); |
| 6697 | #else |
| 6698 | bfd_default_set_arch_mach (abfd, bfd_arch_aarch64, bfd_mach_aarch64); |
| 6699 | #endif |
| 6700 | return TRUE; |
| 6701 | } |
| 6702 | |
| 6703 | /* Function to keep AArch64 specific flags in the ELF header. */ |
| 6704 | |
| 6705 | static bfd_boolean |
| 6706 | elfNN_aarch64_set_private_flags (bfd *abfd, flagword flags) |
| 6707 | { |
| 6708 | if (elf_flags_init (abfd) && elf_elfheader (abfd)->e_flags != flags) |
| 6709 | { |
| 6710 | } |
| 6711 | else |
| 6712 | { |
| 6713 | elf_elfheader (abfd)->e_flags = flags; |
| 6714 | elf_flags_init (abfd) = TRUE; |
| 6715 | } |
| 6716 | |
| 6717 | return TRUE; |
| 6718 | } |
| 6719 | |
| 6720 | /* Merge backend specific data from an object file to the output |
| 6721 | object file when linking. */ |
| 6722 | |
| 6723 | static bfd_boolean |
| 6724 | elfNN_aarch64_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) |
| 6725 | { |
| 6726 | bfd *obfd = info->output_bfd; |
| 6727 | flagword out_flags; |
| 6728 | flagword in_flags; |
| 6729 | bfd_boolean flags_compatible = TRUE; |
| 6730 | asection *sec; |
| 6731 | |
| 6732 | /* Check if we have the same endianess. */ |
| 6733 | if (!_bfd_generic_verify_endian_match (ibfd, info)) |
| 6734 | return FALSE; |
| 6735 | |
| 6736 | if (!is_aarch64_elf (ibfd) || !is_aarch64_elf (obfd)) |
| 6737 | return TRUE; |
| 6738 | |
| 6739 | /* The input BFD must have had its flags initialised. */ |
| 6740 | /* The following seems bogus to me -- The flags are initialized in |
| 6741 | the assembler but I don't think an elf_flags_init field is |
| 6742 | written into the object. */ |
| 6743 | /* BFD_ASSERT (elf_flags_init (ibfd)); */ |
| 6744 | |
| 6745 | in_flags = elf_elfheader (ibfd)->e_flags; |
| 6746 | out_flags = elf_elfheader (obfd)->e_flags; |
| 6747 | |
| 6748 | if (!elf_flags_init (obfd)) |
| 6749 | { |
| 6750 | /* If the input is the default architecture and had the default |
| 6751 | flags then do not bother setting the flags for the output |
| 6752 | architecture, instead allow future merges to do this. If no |
| 6753 | future merges ever set these flags then they will retain their |
| 6754 | uninitialised values, which surprise surprise, correspond |
| 6755 | to the default values. */ |
| 6756 | if (bfd_get_arch_info (ibfd)->the_default |
| 6757 | && elf_elfheader (ibfd)->e_flags == 0) |
| 6758 | return TRUE; |
| 6759 | |
| 6760 | elf_flags_init (obfd) = TRUE; |
| 6761 | elf_elfheader (obfd)->e_flags = in_flags; |
| 6762 | |
| 6763 | if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) |
| 6764 | && bfd_get_arch_info (obfd)->the_default) |
| 6765 | return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), |
| 6766 | bfd_get_mach (ibfd)); |
| 6767 | |
| 6768 | return TRUE; |
| 6769 | } |
| 6770 | |
| 6771 | /* Identical flags must be compatible. */ |
| 6772 | if (in_flags == out_flags) |
| 6773 | return TRUE; |
| 6774 | |
| 6775 | /* Check to see if the input BFD actually contains any sections. If |
| 6776 | not, its flags may not have been initialised either, but it |
| 6777 | cannot actually cause any incompatiblity. Do not short-circuit |
| 6778 | dynamic objects; their section list may be emptied by |
| 6779 | elf_link_add_object_symbols. |
| 6780 | |
| 6781 | Also check to see if there are no code sections in the input. |
| 6782 | In this case there is no need to check for code specific flags. |
| 6783 | XXX - do we need to worry about floating-point format compatability |
| 6784 | in data sections ? */ |
| 6785 | if (!(ibfd->flags & DYNAMIC)) |
| 6786 | { |
| 6787 | bfd_boolean null_input_bfd = TRUE; |
| 6788 | bfd_boolean only_data_sections = TRUE; |
| 6789 | |
| 6790 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) |
| 6791 | { |
| 6792 | if ((bfd_get_section_flags (ibfd, sec) |
| 6793 | & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)) |
| 6794 | == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)) |
| 6795 | only_data_sections = FALSE; |
| 6796 | |
| 6797 | null_input_bfd = FALSE; |
| 6798 | break; |
| 6799 | } |
| 6800 | |
| 6801 | if (null_input_bfd || only_data_sections) |
| 6802 | return TRUE; |
| 6803 | } |
| 6804 | |
| 6805 | return flags_compatible; |
| 6806 | } |
| 6807 | |
| 6808 | /* Display the flags field. */ |
| 6809 | |
| 6810 | static bfd_boolean |
| 6811 | elfNN_aarch64_print_private_bfd_data (bfd *abfd, void *ptr) |
| 6812 | { |
| 6813 | FILE *file = (FILE *) ptr; |
| 6814 | unsigned long flags; |
| 6815 | |
| 6816 | BFD_ASSERT (abfd != NULL && ptr != NULL); |
| 6817 | |
| 6818 | /* Print normal ELF private data. */ |
| 6819 | _bfd_elf_print_private_bfd_data (abfd, ptr); |
| 6820 | |
| 6821 | flags = elf_elfheader (abfd)->e_flags; |
| 6822 | /* Ignore init flag - it may not be set, despite the flags field |
| 6823 | containing valid data. */ |
| 6824 | |
| 6825 | /* xgettext:c-format */ |
| 6826 | fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); |
| 6827 | |
| 6828 | if (flags) |
| 6829 | fprintf (file, _("<Unrecognised flag bits set>")); |
| 6830 | |
| 6831 | fputc ('\n', file); |
| 6832 | |
| 6833 | return TRUE; |
| 6834 | } |
| 6835 | |
| 6836 | /* Find dynamic relocs for H that apply to read-only sections. */ |
| 6837 | |
| 6838 | static asection * |
| 6839 | readonly_dynrelocs (struct elf_link_hash_entry *h) |
| 6840 | { |
| 6841 | struct elf_dyn_relocs *p; |
| 6842 | |
| 6843 | for (p = elf_aarch64_hash_entry (h)->dyn_relocs; p != NULL; p = p->next) |
| 6844 | { |
| 6845 | asection *s = p->sec->output_section; |
| 6846 | |
| 6847 | if (s != NULL && (s->flags & SEC_READONLY) != 0) |
| 6848 | return p->sec; |
| 6849 | } |
| 6850 | return NULL; |
| 6851 | } |
| 6852 | |
| 6853 | /* Return true if we need copy relocation against EH. */ |
| 6854 | |
| 6855 | static bfd_boolean |
| 6856 | need_copy_relocation_p (struct elf_aarch64_link_hash_entry *eh) |
| 6857 | { |
| 6858 | struct elf_dyn_relocs *p; |
| 6859 | asection *s; |
| 6860 | |
| 6861 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
| 6862 | { |
| 6863 | /* If there is any pc-relative reference, we need to keep copy relocation |
| 6864 | to avoid propagating the relocation into runtime that current glibc |
| 6865 | does not support. */ |
| 6866 | if (p->pc_count) |
| 6867 | return TRUE; |
| 6868 | |
| 6869 | s = p->sec->output_section; |
| 6870 | /* Need copy relocation if it's against read-only section. */ |
| 6871 | if (s != NULL && (s->flags & SEC_READONLY) != 0) |
| 6872 | return TRUE; |
| 6873 | } |
| 6874 | |
| 6875 | return FALSE; |
| 6876 | } |
| 6877 | |
| 6878 | /* Adjust a symbol defined by a dynamic object and referenced by a |
| 6879 | regular object. The current definition is in some section of the |
| 6880 | dynamic object, but we're not including those sections. We have to |
| 6881 | change the definition to something the rest of the link can |
| 6882 | understand. */ |
| 6883 | |
| 6884 | static bfd_boolean |
| 6885 | elfNN_aarch64_adjust_dynamic_symbol (struct bfd_link_info *info, |
| 6886 | struct elf_link_hash_entry *h) |
| 6887 | { |
| 6888 | struct elf_aarch64_link_hash_table *htab; |
| 6889 | asection *s, *srel; |
| 6890 | |
| 6891 | /* If this is a function, put it in the procedure linkage table. We |
| 6892 | will fill in the contents of the procedure linkage table later, |
| 6893 | when we know the address of the .got section. */ |
| 6894 | if (h->type == STT_FUNC || h->type == STT_GNU_IFUNC || h->needs_plt) |
| 6895 | { |
| 6896 | if (h->plt.refcount <= 0 |
| 6897 | || (h->type != STT_GNU_IFUNC |
| 6898 | && (SYMBOL_CALLS_LOCAL (info, h) |
| 6899 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
| 6900 | && h->root.type == bfd_link_hash_undefweak)))) |
| 6901 | { |
| 6902 | /* This case can occur if we saw a CALL26 reloc in |
| 6903 | an input file, but the symbol wasn't referred to |
| 6904 | by a dynamic object or all references were |
| 6905 | garbage collected. In which case we can end up |
| 6906 | resolving. */ |
| 6907 | h->plt.offset = (bfd_vma) - 1; |
| 6908 | h->needs_plt = 0; |
| 6909 | } |
| 6910 | |
| 6911 | return TRUE; |
| 6912 | } |
| 6913 | else |
| 6914 | /* Otherwise, reset to -1. */ |
| 6915 | h->plt.offset = (bfd_vma) - 1; |
| 6916 | |
| 6917 | |
| 6918 | /* If this is a weak symbol, and there is a real definition, the |
| 6919 | processor independent code will have arranged for us to see the |
| 6920 | real definition first, and we can just use the same value. */ |
| 6921 | if (h->is_weakalias) |
| 6922 | { |
| 6923 | struct elf_link_hash_entry *def = weakdef (h); |
| 6924 | BFD_ASSERT (def->root.type == bfd_link_hash_defined); |
| 6925 | h->root.u.def.section = def->root.u.def.section; |
| 6926 | h->root.u.def.value = def->root.u.def.value; |
| 6927 | if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) |
| 6928 | h->non_got_ref = def->non_got_ref; |
| 6929 | return TRUE; |
| 6930 | } |
| 6931 | |
| 6932 | /* If we are creating a shared library, we must presume that the |
| 6933 | only references to the symbol are via the global offset table. |
| 6934 | For such cases we need not do anything here; the relocations will |
| 6935 | be handled correctly by relocate_section. */ |
| 6936 | if (bfd_link_pic (info)) |
| 6937 | return TRUE; |
| 6938 | |
| 6939 | /* If there are no references to this symbol that do not use the |
| 6940 | GOT, we don't need to generate a copy reloc. */ |
| 6941 | if (!h->non_got_ref) |
| 6942 | return TRUE; |
| 6943 | |
| 6944 | /* If -z nocopyreloc was given, we won't generate them either. */ |
| 6945 | if (info->nocopyreloc) |
| 6946 | { |
| 6947 | h->non_got_ref = 0; |
| 6948 | return TRUE; |
| 6949 | } |
| 6950 | |
| 6951 | if (ELIMINATE_COPY_RELOCS) |
| 6952 | { |
| 6953 | struct elf_aarch64_link_hash_entry *eh; |
| 6954 | /* If we don't find any dynamic relocs in read-only sections, then |
| 6955 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ |
| 6956 | eh = (struct elf_aarch64_link_hash_entry *) h; |
| 6957 | if (!need_copy_relocation_p (eh)) |
| 6958 | { |
| 6959 | h->non_got_ref = 0; |
| 6960 | return TRUE; |
| 6961 | } |
| 6962 | } |
| 6963 | |
| 6964 | /* We must allocate the symbol in our .dynbss section, which will |
| 6965 | become part of the .bss section of the executable. There will be |
| 6966 | an entry for this symbol in the .dynsym section. The dynamic |
| 6967 | object will contain position independent code, so all references |
| 6968 | from the dynamic object to this symbol will go through the global |
| 6969 | offset table. The dynamic linker will use the .dynsym entry to |
| 6970 | determine the address it must put in the global offset table, so |
| 6971 | both the dynamic object and the regular object will refer to the |
| 6972 | same memory location for the variable. */ |
| 6973 | |
| 6974 | htab = elf_aarch64_hash_table (info); |
| 6975 | |
| 6976 | /* We must generate a R_AARCH64_COPY reloc to tell the dynamic linker |
| 6977 | to copy the initial value out of the dynamic object and into the |
| 6978 | runtime process image. */ |
| 6979 | if ((h->root.u.def.section->flags & SEC_READONLY) != 0) |
| 6980 | { |
| 6981 | s = htab->root.sdynrelro; |
| 6982 | srel = htab->root.sreldynrelro; |
| 6983 | } |
| 6984 | else |
| 6985 | { |
| 6986 | s = htab->root.sdynbss; |
| 6987 | srel = htab->root.srelbss; |
| 6988 | } |
| 6989 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) |
| 6990 | { |
| 6991 | srel->size += RELOC_SIZE (htab); |
| 6992 | h->needs_copy = 1; |
| 6993 | } |
| 6994 | |
| 6995 | return _bfd_elf_adjust_dynamic_copy (info, h, s); |
| 6996 | |
| 6997 | } |
| 6998 | |
| 6999 | static bfd_boolean |
| 7000 | elfNN_aarch64_allocate_local_symbols (bfd *abfd, unsigned number) |
| 7001 | { |
| 7002 | struct elf_aarch64_local_symbol *locals; |
| 7003 | locals = elf_aarch64_locals (abfd); |
| 7004 | if (locals == NULL) |
| 7005 | { |
| 7006 | locals = (struct elf_aarch64_local_symbol *) |
| 7007 | bfd_zalloc (abfd, number * sizeof (struct elf_aarch64_local_symbol)); |
| 7008 | if (locals == NULL) |
| 7009 | return FALSE; |
| 7010 | elf_aarch64_locals (abfd) = locals; |
| 7011 | } |
| 7012 | return TRUE; |
| 7013 | } |
| 7014 | |
| 7015 | /* Create the .got section to hold the global offset table. */ |
| 7016 | |
| 7017 | static bfd_boolean |
| 7018 | aarch64_elf_create_got_section (bfd *abfd, struct bfd_link_info *info) |
| 7019 | { |
| 7020 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
| 7021 | flagword flags; |
| 7022 | asection *s; |
| 7023 | struct elf_link_hash_entry *h; |
| 7024 | struct elf_link_hash_table *htab = elf_hash_table (info); |
| 7025 | |
| 7026 | /* This function may be called more than once. */ |
| 7027 | if (htab->sgot != NULL) |
| 7028 | return TRUE; |
| 7029 | |
| 7030 | flags = bed->dynamic_sec_flags; |
| 7031 | |
| 7032 | s = bfd_make_section_anyway_with_flags (abfd, |
| 7033 | (bed->rela_plts_and_copies_p |
| 7034 | ? ".rela.got" : ".rel.got"), |
| 7035 | (bed->dynamic_sec_flags |
| 7036 | | SEC_READONLY)); |
| 7037 | if (s == NULL |
| 7038 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
| 7039 | return FALSE; |
| 7040 | htab->srelgot = s; |
| 7041 | |
| 7042 | s = bfd_make_section_anyway_with_flags (abfd, ".got", flags); |
| 7043 | if (s == NULL |
| 7044 | || !bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
| 7045 | return FALSE; |
| 7046 | htab->sgot = s; |
| 7047 | htab->sgot->size += GOT_ENTRY_SIZE; |
| 7048 | |
| 7049 | if (bed->want_got_sym) |
| 7050 | { |
| 7051 | /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got |
| 7052 | (or .got.plt) section. We don't do this in the linker script |
| 7053 | because we don't want to define the symbol if we are not creating |
| 7054 | a global offset table. */ |
| 7055 | h = _bfd_elf_define_linkage_sym (abfd, info, s, |
| 7056 | "_GLOBAL_OFFSET_TABLE_"); |
| 7057 | elf_hash_table (info)->hgot = h; |
| 7058 | if (h == NULL) |
| 7059 | return FALSE; |
| 7060 | } |
| 7061 | |
| 7062 | if (bed->want_got_plt) |
| 7063 | { |
| 7064 | s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags); |
| 7065 | if (s == NULL |
| 7066 | || !bfd_set_section_alignment (abfd, s, |
| 7067 | bed->s->log_file_align)) |
| 7068 | return FALSE; |
| 7069 | htab->sgotplt = s; |
| 7070 | } |
| 7071 | |
| 7072 | /* The first bit of the global offset table is the header. */ |
| 7073 | s->size += bed->got_header_size; |
| 7074 | |
| 7075 | return TRUE; |
| 7076 | } |
| 7077 | |
| 7078 | /* Look through the relocs for a section during the first phase. */ |
| 7079 | |
| 7080 | static bfd_boolean |
| 7081 | elfNN_aarch64_check_relocs (bfd *abfd, struct bfd_link_info *info, |
| 7082 | asection *sec, const Elf_Internal_Rela *relocs) |
| 7083 | { |
| 7084 | Elf_Internal_Shdr *symtab_hdr; |
| 7085 | struct elf_link_hash_entry **sym_hashes; |
| 7086 | const Elf_Internal_Rela *rel; |
| 7087 | const Elf_Internal_Rela *rel_end; |
| 7088 | asection *sreloc; |
| 7089 | |
| 7090 | struct elf_aarch64_link_hash_table *htab; |
| 7091 | |
| 7092 | if (bfd_link_relocatable (info)) |
| 7093 | return TRUE; |
| 7094 | |
| 7095 | BFD_ASSERT (is_aarch64_elf (abfd)); |
| 7096 | |
| 7097 | htab = elf_aarch64_hash_table (info); |
| 7098 | sreloc = NULL; |
| 7099 | |
| 7100 | symtab_hdr = &elf_symtab_hdr (abfd); |
| 7101 | sym_hashes = elf_sym_hashes (abfd); |
| 7102 | |
| 7103 | rel_end = relocs + sec->reloc_count; |
| 7104 | for (rel = relocs; rel < rel_end; rel++) |
| 7105 | { |
| 7106 | struct elf_link_hash_entry *h; |
| 7107 | unsigned int r_symndx; |
| 7108 | unsigned int r_type; |
| 7109 | bfd_reloc_code_real_type bfd_r_type; |
| 7110 | Elf_Internal_Sym *isym; |
| 7111 | |
| 7112 | r_symndx = ELFNN_R_SYM (rel->r_info); |
| 7113 | r_type = ELFNN_R_TYPE (rel->r_info); |
| 7114 | |
| 7115 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) |
| 7116 | { |
| 7117 | /* xgettext:c-format */ |
| 7118 | _bfd_error_handler (_("%pB: bad symbol index: %d"), abfd, r_symndx); |
| 7119 | return FALSE; |
| 7120 | } |
| 7121 | |
| 7122 | if (r_symndx < symtab_hdr->sh_info) |
| 7123 | { |
| 7124 | /* A local symbol. */ |
| 7125 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
| 7126 | abfd, r_symndx); |
| 7127 | if (isym == NULL) |
| 7128 | return FALSE; |
| 7129 | |
| 7130 | /* Check relocation against local STT_GNU_IFUNC symbol. */ |
| 7131 | if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
| 7132 | { |
| 7133 | h = elfNN_aarch64_get_local_sym_hash (htab, abfd, rel, |
| 7134 | TRUE); |
| 7135 | if (h == NULL) |
| 7136 | return FALSE; |
| 7137 | |
| 7138 | /* Fake a STT_GNU_IFUNC symbol. */ |
| 7139 | h->type = STT_GNU_IFUNC; |
| 7140 | h->def_regular = 1; |
| 7141 | h->ref_regular = 1; |
| 7142 | h->forced_local = 1; |
| 7143 | h->root.type = bfd_link_hash_defined; |
| 7144 | } |
| 7145 | else |
| 7146 | h = NULL; |
| 7147 | } |
| 7148 | else |
| 7149 | { |
| 7150 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 7151 | while (h->root.type == bfd_link_hash_indirect |
| 7152 | || h->root.type == bfd_link_hash_warning) |
| 7153 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 7154 | } |
| 7155 | |
| 7156 | /* Could be done earlier, if h were already available. */ |
| 7157 | bfd_r_type = aarch64_tls_transition (abfd, info, r_type, h, r_symndx); |
| 7158 | |
| 7159 | if (h != NULL) |
| 7160 | { |
| 7161 | /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got. |
| 7162 | This shows up in particular in an R_AARCH64_PREL64 in large model |
| 7163 | when calculating the pc-relative address to .got section which is |
| 7164 | used to initialize the gp register. */ |
| 7165 | if (h->root.root.string |
| 7166 | && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) |
| 7167 | { |
| 7168 | if (htab->root.dynobj == NULL) |
| 7169 | htab->root.dynobj = abfd; |
| 7170 | |
| 7171 | if (! aarch64_elf_create_got_section (htab->root.dynobj, info)) |
| 7172 | return FALSE; |
| 7173 | |
| 7174 | BFD_ASSERT (h == htab->root.hgot); |
| 7175 | } |
| 7176 | |
| 7177 | /* Create the ifunc sections for static executables. If we |
| 7178 | never see an indirect function symbol nor we are building |
| 7179 | a static executable, those sections will be empty and |
| 7180 | won't appear in output. */ |
| 7181 | switch (bfd_r_type) |
| 7182 | { |
| 7183 | default: |
| 7184 | break; |
| 7185 | |
| 7186 | case BFD_RELOC_AARCH64_ADD_LO12: |
| 7187 | case BFD_RELOC_AARCH64_ADR_GOT_PAGE: |
| 7188 | case BFD_RELOC_AARCH64_ADR_HI21_PCREL: |
| 7189 | case BFD_RELOC_AARCH64_CALL26: |
| 7190 | case BFD_RELOC_AARCH64_GOT_LD_PREL19: |
| 7191 | case BFD_RELOC_AARCH64_JUMP26: |
| 7192 | case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14: |
| 7193 | case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC: |
| 7194 | case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15: |
| 7195 | case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15: |
| 7196 | case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC: |
| 7197 | case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC: |
| 7198 | case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1: |
| 7199 | case BFD_RELOC_AARCH64_NN: |
| 7200 | if (htab->root.dynobj == NULL) |
| 7201 | htab->root.dynobj = abfd; |
| 7202 | if (!_bfd_elf_create_ifunc_sections (htab->root.dynobj, info)) |
| 7203 | return FALSE; |
| 7204 | break; |
| 7205 | } |
| 7206 | |
| 7207 | /* It is referenced by a non-shared object. */ |
| 7208 | h->ref_regular = 1; |
| 7209 | } |
| 7210 | |
| 7211 | switch (bfd_r_type) |
| 7212 | { |
| 7213 | case BFD_RELOC_AARCH64_16: |
| 7214 | #if ARCH_SIZE == 64 |
| 7215 | case BFD_RELOC_AARCH64_32: |
| 7216 | #endif |
| 7217 | if (bfd_link_pic (info) && (sec->flags & SEC_ALLOC) != 0) |
| 7218 | { |
| 7219 | if (h != NULL |
| 7220 | /* This is an absolute symbol. It represents a value instead |
| 7221 | of an address. */ |
| 7222 | && ((h->root.type == bfd_link_hash_defined |
| 7223 | && bfd_is_abs_section (h->root.u.def.section)) |
| 7224 | /* This is an undefined symbol. */ |
| 7225 | || h->root.type == bfd_link_hash_undefined)) |
| 7226 | break; |
| 7227 | |
| 7228 | /* For local symbols, defined global symbols in a non-ABS section, |
| 7229 | it is assumed that the value is an address. */ |
| 7230 | int howto_index = bfd_r_type - BFD_RELOC_AARCH64_RELOC_START; |
| 7231 | _bfd_error_handler |
| 7232 | /* xgettext:c-format */ |
| 7233 | (_("%pB: relocation %s against `%s' can not be used when making " |
| 7234 | "a shared object"), |
| 7235 | abfd, elfNN_aarch64_howto_table[howto_index].name, |
| 7236 | (h) ? h->root.root.string : "a local symbol"); |
| 7237 | bfd_set_error (bfd_error_bad_value); |
| 7238 | return FALSE; |
| 7239 | } |
| 7240 | else |
| 7241 | break; |
| 7242 | |
| 7243 | case BFD_RELOC_AARCH64_MOVW_G0_NC: |
| 7244 | case BFD_RELOC_AARCH64_MOVW_G1_NC: |
| 7245 | case BFD_RELOC_AARCH64_MOVW_G2_NC: |
| 7246 | case BFD_RELOC_AARCH64_MOVW_G3: |
| 7247 | if (bfd_link_pic (info)) |
| 7248 | { |
| 7249 | int howto_index = bfd_r_type - BFD_RELOC_AARCH64_RELOC_START; |
| 7250 | _bfd_error_handler |
| 7251 | /* xgettext:c-format */ |
| 7252 | (_("%pB: relocation %s against `%s' can not be used when making " |
| 7253 | "a shared object; recompile with -fPIC"), |
| 7254 | abfd, elfNN_aarch64_howto_table[howto_index].name, |
| 7255 | (h) ? h->root.root.string : "a local symbol"); |
| 7256 | bfd_set_error (bfd_error_bad_value); |
| 7257 | return FALSE; |
| 7258 | } |
| 7259 | /* Fall through. */ |
| 7260 | |
| 7261 | case BFD_RELOC_AARCH64_16_PCREL: |
| 7262 | case BFD_RELOC_AARCH64_32_PCREL: |
| 7263 | case BFD_RELOC_AARCH64_64_PCREL: |
| 7264 | case BFD_RELOC_AARCH64_ADD_LO12: |
| 7265 | case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL: |
| 7266 | case BFD_RELOC_AARCH64_ADR_HI21_PCREL: |
| 7267 | case BFD_RELOC_AARCH64_ADR_LO21_PCREL: |
| 7268 | case BFD_RELOC_AARCH64_LDST128_LO12: |
| 7269 | case BFD_RELOC_AARCH64_LDST16_LO12: |
| 7270 | case BFD_RELOC_AARCH64_LDST32_LO12: |
| 7271 | case BFD_RELOC_AARCH64_LDST64_LO12: |
| 7272 | case BFD_RELOC_AARCH64_LDST8_LO12: |
| 7273 | case BFD_RELOC_AARCH64_LD_LO19_PCREL: |
| 7274 | if (h == NULL || bfd_link_pic (info)) |
| 7275 | break; |
| 7276 | /* Fall through. */ |
| 7277 | |
| 7278 | case BFD_RELOC_AARCH64_NN: |
| 7279 | |
| 7280 | /* We don't need to handle relocs into sections not going into |
| 7281 | the "real" output. */ |
| 7282 | if ((sec->flags & SEC_ALLOC) == 0) |
| 7283 | break; |
| 7284 | |
| 7285 | if (h != NULL) |
| 7286 | { |
| 7287 | if (!bfd_link_pic (info)) |
| 7288 | h->non_got_ref = 1; |
| 7289 | |
| 7290 | h->plt.refcount += 1; |
| 7291 | h->pointer_equality_needed = 1; |
| 7292 | } |
| 7293 | |
| 7294 | /* No need to do anything if we're not creating a shared |
| 7295 | object. */ |
| 7296 | if (!(bfd_link_pic (info) |
| 7297 | /* If on the other hand, we are creating an executable, we |
| 7298 | may need to keep relocations for symbols satisfied by a |
| 7299 | dynamic library if we manage to avoid copy relocs for the |
| 7300 | symbol. |
| 7301 | |
| 7302 | NOTE: Currently, there is no support of copy relocs |
| 7303 | elimination on pc-relative relocation types, because there is |
| 7304 | no dynamic relocation support for them in glibc. We still |
| 7305 | record the dynamic symbol reference for them. This is |
| 7306 | because one symbol may be referenced by both absolute |
| 7307 | relocation (for example, BFD_RELOC_AARCH64_NN) and |
| 7308 | pc-relative relocation. We need full symbol reference |
| 7309 | information to make correct decision later in |
| 7310 | elfNN_aarch64_adjust_dynamic_symbol. */ |
| 7311 | || (ELIMINATE_COPY_RELOCS |
| 7312 | && !bfd_link_pic (info) |
| 7313 | && h != NULL |
| 7314 | && (h->root.type == bfd_link_hash_defweak |
| 7315 | || !h->def_regular)))) |
| 7316 | break; |
| 7317 | |
| 7318 | { |
| 7319 | struct elf_dyn_relocs *p; |
| 7320 | struct elf_dyn_relocs **head; |
| 7321 | int howto_index = bfd_r_type - BFD_RELOC_AARCH64_RELOC_START; |
| 7322 | |
| 7323 | /* We must copy these reloc types into the output file. |
| 7324 | Create a reloc section in dynobj and make room for |
| 7325 | this reloc. */ |
| 7326 | if (sreloc == NULL) |
| 7327 | { |
| 7328 | if (htab->root.dynobj == NULL) |
| 7329 | htab->root.dynobj = abfd; |
| 7330 | |
| 7331 | sreloc = _bfd_elf_make_dynamic_reloc_section |
| 7332 | (sec, htab->root.dynobj, LOG_FILE_ALIGN, abfd, /*rela? */ TRUE); |
| 7333 | |
| 7334 | if (sreloc == NULL) |
| 7335 | return FALSE; |
| 7336 | } |
| 7337 | |
| 7338 | /* If this is a global symbol, we count the number of |
| 7339 | relocations we need for this symbol. */ |
| 7340 | if (h != NULL) |
| 7341 | { |
| 7342 | struct elf_aarch64_link_hash_entry *eh; |
| 7343 | eh = (struct elf_aarch64_link_hash_entry *) h; |
| 7344 | head = &eh->dyn_relocs; |
| 7345 | } |
| 7346 | else |
| 7347 | { |
| 7348 | /* Track dynamic relocs needed for local syms too. |
| 7349 | We really need local syms available to do this |
| 7350 | easily. Oh well. */ |
| 7351 | |
| 7352 | asection *s; |
| 7353 | void **vpp; |
| 7354 | |
| 7355 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
| 7356 | abfd, r_symndx); |
| 7357 | if (isym == NULL) |
| 7358 | return FALSE; |
| 7359 | |
| 7360 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); |
| 7361 | if (s == NULL) |
| 7362 | s = sec; |
| 7363 | |
| 7364 | /* Beware of type punned pointers vs strict aliasing |
| 7365 | rules. */ |
| 7366 | vpp = &(elf_section_data (s)->local_dynrel); |
| 7367 | head = (struct elf_dyn_relocs **) vpp; |
| 7368 | } |
| 7369 | |
| 7370 | p = *head; |
| 7371 | if (p == NULL || p->sec != sec) |
| 7372 | { |
| 7373 | bfd_size_type amt = sizeof *p; |
| 7374 | p = ((struct elf_dyn_relocs *) |
| 7375 | bfd_zalloc (htab->root.dynobj, amt)); |
| 7376 | if (p == NULL) |
| 7377 | return FALSE; |
| 7378 | p->next = *head; |
| 7379 | *head = p; |
| 7380 | p->sec = sec; |
| 7381 | } |
| 7382 | |
| 7383 | p->count += 1; |
| 7384 | |
| 7385 | if (elfNN_aarch64_howto_table[howto_index].pc_relative) |
| 7386 | p->pc_count += 1; |
| 7387 | } |
| 7388 | break; |
| 7389 | |
| 7390 | /* RR: We probably want to keep a consistency check that |
| 7391 | there are no dangling GOT_PAGE relocs. */ |
| 7392 | case BFD_RELOC_AARCH64_ADR_GOT_PAGE: |
| 7393 | case BFD_RELOC_AARCH64_GOT_LD_PREL19: |
| 7394 | case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14: |
| 7395 | case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC: |
| 7396 | case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15: |
| 7397 | case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15: |
| 7398 | case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC: |
| 7399 | case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC: |
| 7400 | case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1: |
| 7401 | case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12: |
| 7402 | case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21: |
| 7403 | case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21: |
| 7404 | case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC: |
| 7405 | case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12: |
| 7406 | case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19: |
| 7407 | case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC: |
| 7408 | case BFD_RELOC_AARCH64_TLSDESC_OFF_G1: |
| 7409 | case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC: |
| 7410 | case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21: |
| 7411 | case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21: |
| 7412 | case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC: |
| 7413 | case BFD_RELOC_AARCH64_TLSGD_MOVW_G1: |
| 7414 | case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: |
| 7415 | case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC: |
| 7416 | case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: |
| 7417 | case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19: |
| 7418 | case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC: |
| 7419 | case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1: |
| 7420 | case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC: |
| 7421 | case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21: |
| 7422 | case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21: |
| 7423 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1: |
| 7424 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC: |
| 7425 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2: |
| 7426 | { |
| 7427 | unsigned got_type; |
| 7428 | unsigned old_got_type; |
| 7429 | |
| 7430 | got_type = aarch64_reloc_got_type (bfd_r_type); |
| 7431 | |
| 7432 | if (h) |
| 7433 | { |
| 7434 | h->got.refcount += 1; |
| 7435 | old_got_type = elf_aarch64_hash_entry (h)->got_type; |
| 7436 | } |
| 7437 | else |
| 7438 | { |
| 7439 | struct elf_aarch64_local_symbol *locals; |
| 7440 | |
| 7441 | if (!elfNN_aarch64_allocate_local_symbols |
| 7442 | (abfd, symtab_hdr->sh_info)) |
| 7443 | return FALSE; |
| 7444 | |
| 7445 | locals = elf_aarch64_locals (abfd); |
| 7446 | BFD_ASSERT (r_symndx < symtab_hdr->sh_info); |
| 7447 | locals[r_symndx].got_refcount += 1; |
| 7448 | old_got_type = locals[r_symndx].got_type; |
| 7449 | } |
| 7450 | |
| 7451 | /* If a variable is accessed with both general dynamic TLS |
| 7452 | methods, two slots may be created. */ |
| 7453 | if (GOT_TLS_GD_ANY_P (old_got_type) && GOT_TLS_GD_ANY_P (got_type)) |
| 7454 | got_type |= old_got_type; |
| 7455 | |
| 7456 | /* We will already have issued an error message if there |
| 7457 | is a TLS/non-TLS mismatch, based on the symbol type. |
| 7458 | So just combine any TLS types needed. */ |
| 7459 | if (old_got_type != GOT_UNKNOWN && old_got_type != GOT_NORMAL |
| 7460 | && got_type != GOT_NORMAL) |
| 7461 | got_type |= old_got_type; |
| 7462 | |
| 7463 | /* If the symbol is accessed by both IE and GD methods, we |
| 7464 | are able to relax. Turn off the GD flag, without |
| 7465 | messing up with any other kind of TLS types that may be |
| 7466 | involved. */ |
| 7467 | if ((got_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (got_type)) |
| 7468 | got_type &= ~ (GOT_TLSDESC_GD | GOT_TLS_GD); |
| 7469 | |
| 7470 | if (old_got_type != got_type) |
| 7471 | { |
| 7472 | if (h != NULL) |
| 7473 | elf_aarch64_hash_entry (h)->got_type = got_type; |
| 7474 | else |
| 7475 | { |
| 7476 | struct elf_aarch64_local_symbol *locals; |
| 7477 | locals = elf_aarch64_locals (abfd); |
| 7478 | BFD_ASSERT (r_symndx < symtab_hdr->sh_info); |
| 7479 | locals[r_symndx].got_type = got_type; |
| 7480 | } |
| 7481 | } |
| 7482 | |
| 7483 | if (htab->root.dynobj == NULL) |
| 7484 | htab->root.dynobj = abfd; |
| 7485 | if (! aarch64_elf_create_got_section (htab->root.dynobj, info)) |
| 7486 | return FALSE; |
| 7487 | break; |
| 7488 | } |
| 7489 | |
| 7490 | case BFD_RELOC_AARCH64_CALL26: |
| 7491 | case BFD_RELOC_AARCH64_JUMP26: |
| 7492 | /* If this is a local symbol then we resolve it |
| 7493 | directly without creating a PLT entry. */ |
| 7494 | if (h == NULL) |
| 7495 | continue; |
| 7496 | |
| 7497 | h->needs_plt = 1; |
| 7498 | if (h->plt.refcount <= 0) |
| 7499 | h->plt.refcount = 1; |
| 7500 | else |
| 7501 | h->plt.refcount += 1; |
| 7502 | break; |
| 7503 | |
| 7504 | default: |
| 7505 | break; |
| 7506 | } |
| 7507 | } |
| 7508 | |
| 7509 | return TRUE; |
| 7510 | } |
| 7511 | |
| 7512 | /* Treat mapping symbols as special target symbols. */ |
| 7513 | |
| 7514 | static bfd_boolean |
| 7515 | elfNN_aarch64_is_target_special_symbol (bfd *abfd ATTRIBUTE_UNUSED, |
| 7516 | asymbol *sym) |
| 7517 | { |
| 7518 | return bfd_is_aarch64_special_symbol_name (sym->name, |
| 7519 | BFD_AARCH64_SPECIAL_SYM_TYPE_ANY); |
| 7520 | } |
| 7521 | |
| 7522 | /* This is a copy of elf_find_function () from elf.c except that |
| 7523 | AArch64 mapping symbols are ignored when looking for function names. */ |
| 7524 | |
| 7525 | static bfd_boolean |
| 7526 | aarch64_elf_find_function (bfd *abfd ATTRIBUTE_UNUSED, |
| 7527 | asymbol **symbols, |
| 7528 | asection *section, |
| 7529 | bfd_vma offset, |
| 7530 | const char **filename_ptr, |
| 7531 | const char **functionname_ptr) |
| 7532 | { |
| 7533 | const char *filename = NULL; |
| 7534 | asymbol *func = NULL; |
| 7535 | bfd_vma low_func = 0; |
| 7536 | asymbol **p; |
| 7537 | |
| 7538 | for (p = symbols; *p != NULL; p++) |
| 7539 | { |
| 7540 | elf_symbol_type *q; |
| 7541 | |
| 7542 | q = (elf_symbol_type *) * p; |
| 7543 | |
| 7544 | switch (ELF_ST_TYPE (q->internal_elf_sym.st_info)) |
| 7545 | { |
| 7546 | default: |
| 7547 | break; |
| 7548 | case STT_FILE: |
| 7549 | filename = bfd_asymbol_name (&q->symbol); |
| 7550 | break; |
| 7551 | case STT_FUNC: |
| 7552 | case STT_NOTYPE: |
| 7553 | /* Skip mapping symbols. */ |
| 7554 | if ((q->symbol.flags & BSF_LOCAL) |
| 7555 | && (bfd_is_aarch64_special_symbol_name |
| 7556 | (q->symbol.name, BFD_AARCH64_SPECIAL_SYM_TYPE_ANY))) |
| 7557 | continue; |
| 7558 | /* Fall through. */ |
| 7559 | if (bfd_get_section (&q->symbol) == section |
| 7560 | && q->symbol.value >= low_func && q->symbol.value <= offset) |
| 7561 | { |
| 7562 | func = (asymbol *) q; |
| 7563 | low_func = q->symbol.value; |
| 7564 | } |
| 7565 | break; |
| 7566 | } |
| 7567 | } |
| 7568 | |
| 7569 | if (func == NULL) |
| 7570 | return FALSE; |
| 7571 | |
| 7572 | if (filename_ptr) |
| 7573 | *filename_ptr = filename; |
| 7574 | if (functionname_ptr) |
| 7575 | *functionname_ptr = bfd_asymbol_name (func); |
| 7576 | |
| 7577 | return TRUE; |
| 7578 | } |
| 7579 | |
| 7580 | |
| 7581 | /* Find the nearest line to a particular section and offset, for error |
| 7582 | reporting. This code is a duplicate of the code in elf.c, except |
| 7583 | that it uses aarch64_elf_find_function. */ |
| 7584 | |
| 7585 | static bfd_boolean |
| 7586 | elfNN_aarch64_find_nearest_line (bfd *abfd, |
| 7587 | asymbol **symbols, |
| 7588 | asection *section, |
| 7589 | bfd_vma offset, |
| 7590 | const char **filename_ptr, |
| 7591 | const char **functionname_ptr, |
| 7592 | unsigned int *line_ptr, |
| 7593 | unsigned int *discriminator_ptr) |
| 7594 | { |
| 7595 | bfd_boolean found = FALSE; |
| 7596 | |
| 7597 | if (_bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset, |
| 7598 | filename_ptr, functionname_ptr, |
| 7599 | line_ptr, discriminator_ptr, |
| 7600 | dwarf_debug_sections, 0, |
| 7601 | &elf_tdata (abfd)->dwarf2_find_line_info)) |
| 7602 | { |
| 7603 | if (!*functionname_ptr) |
| 7604 | aarch64_elf_find_function (abfd, symbols, section, offset, |
| 7605 | *filename_ptr ? NULL : filename_ptr, |
| 7606 | functionname_ptr); |
| 7607 | |
| 7608 | return TRUE; |
| 7609 | } |
| 7610 | |
| 7611 | /* Skip _bfd_dwarf1_find_nearest_line since no known AArch64 |
| 7612 | toolchain uses DWARF1. */ |
| 7613 | |
| 7614 | if (!_bfd_stab_section_find_nearest_line (abfd, symbols, section, offset, |
| 7615 | &found, filename_ptr, |
| 7616 | functionname_ptr, line_ptr, |
| 7617 | &elf_tdata (abfd)->line_info)) |
| 7618 | return FALSE; |
| 7619 | |
| 7620 | if (found && (*functionname_ptr || *line_ptr)) |
| 7621 | return TRUE; |
| 7622 | |
| 7623 | if (symbols == NULL) |
| 7624 | return FALSE; |
| 7625 | |
| 7626 | if (!aarch64_elf_find_function (abfd, symbols, section, offset, |
| 7627 | filename_ptr, functionname_ptr)) |
| 7628 | return FALSE; |
| 7629 | |
| 7630 | *line_ptr = 0; |
| 7631 | return TRUE; |
| 7632 | } |
| 7633 | |
| 7634 | static bfd_boolean |
| 7635 | elfNN_aarch64_find_inliner_info (bfd *abfd, |
| 7636 | const char **filename_ptr, |
| 7637 | const char **functionname_ptr, |
| 7638 | unsigned int *line_ptr) |
| 7639 | { |
| 7640 | bfd_boolean found; |
| 7641 | found = _bfd_dwarf2_find_inliner_info |
| 7642 | (abfd, filename_ptr, |
| 7643 | functionname_ptr, line_ptr, &elf_tdata (abfd)->dwarf2_find_line_info); |
| 7644 | return found; |
| 7645 | } |
| 7646 | |
| 7647 | |
| 7648 | static void |
| 7649 | elfNN_aarch64_post_process_headers (bfd *abfd, |
| 7650 | struct bfd_link_info *link_info) |
| 7651 | { |
| 7652 | Elf_Internal_Ehdr *i_ehdrp; /* ELF file header, internal form. */ |
| 7653 | |
| 7654 | i_ehdrp = elf_elfheader (abfd); |
| 7655 | i_ehdrp->e_ident[EI_ABIVERSION] = AARCH64_ELF_ABI_VERSION; |
| 7656 | |
| 7657 | _bfd_elf_post_process_headers (abfd, link_info); |
| 7658 | } |
| 7659 | |
| 7660 | static enum elf_reloc_type_class |
| 7661 | elfNN_aarch64_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 7662 | const asection *rel_sec ATTRIBUTE_UNUSED, |
| 7663 | const Elf_Internal_Rela *rela) |
| 7664 | { |
| 7665 | struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info); |
| 7666 | |
| 7667 | if (htab->root.dynsym != NULL |
| 7668 | && htab->root.dynsym->contents != NULL) |
| 7669 | { |
| 7670 | /* Check relocation against STT_GNU_IFUNC symbol if there are |
| 7671 | dynamic symbols. */ |
| 7672 | bfd *abfd = info->output_bfd; |
| 7673 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
| 7674 | unsigned long r_symndx = ELFNN_R_SYM (rela->r_info); |
| 7675 | if (r_symndx != STN_UNDEF) |
| 7676 | { |
| 7677 | Elf_Internal_Sym sym; |
| 7678 | if (!bed->s->swap_symbol_in (abfd, |
| 7679 | (htab->root.dynsym->contents |
| 7680 | + r_symndx * bed->s->sizeof_sym), |
| 7681 | 0, &sym)) |
| 7682 | { |
| 7683 | /* xgettext:c-format */ |
| 7684 | _bfd_error_handler (_("%pB symbol number %lu references" |
| 7685 | " nonexistent SHT_SYMTAB_SHNDX section"), |
| 7686 | abfd, r_symndx); |
| 7687 | /* Ideally an error class should be returned here. */ |
| 7688 | } |
| 7689 | else if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC) |
| 7690 | return reloc_class_ifunc; |
| 7691 | } |
| 7692 | } |
| 7693 | |
| 7694 | switch ((int) ELFNN_R_TYPE (rela->r_info)) |
| 7695 | { |
| 7696 | case AARCH64_R (IRELATIVE): |
| 7697 | return reloc_class_ifunc; |
| 7698 | case AARCH64_R (RELATIVE): |
| 7699 | return reloc_class_relative; |
| 7700 | case AARCH64_R (JUMP_SLOT): |
| 7701 | return reloc_class_plt; |
| 7702 | case AARCH64_R (COPY): |
| 7703 | return reloc_class_copy; |
| 7704 | default: |
| 7705 | return reloc_class_normal; |
| 7706 | } |
| 7707 | } |
| 7708 | |
| 7709 | /* Handle an AArch64 specific section when reading an object file. This is |
| 7710 | called when bfd_section_from_shdr finds a section with an unknown |
| 7711 | type. */ |
| 7712 | |
| 7713 | static bfd_boolean |
| 7714 | elfNN_aarch64_section_from_shdr (bfd *abfd, |
| 7715 | Elf_Internal_Shdr *hdr, |
| 7716 | const char *name, int shindex) |
| 7717 | { |
| 7718 | /* There ought to be a place to keep ELF backend specific flags, but |
| 7719 | at the moment there isn't one. We just keep track of the |
| 7720 | sections by their name, instead. Fortunately, the ABI gives |
| 7721 | names for all the AArch64 specific sections, so we will probably get |
| 7722 | away with this. */ |
| 7723 | switch (hdr->sh_type) |
| 7724 | { |
| 7725 | case SHT_AARCH64_ATTRIBUTES: |
| 7726 | break; |
| 7727 | |
| 7728 | default: |
| 7729 | return FALSE; |
| 7730 | } |
| 7731 | |
| 7732 | if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) |
| 7733 | return FALSE; |
| 7734 | |
| 7735 | return TRUE; |
| 7736 | } |
| 7737 | |
| 7738 | /* A structure used to record a list of sections, independently |
| 7739 | of the next and prev fields in the asection structure. */ |
| 7740 | typedef struct section_list |
| 7741 | { |
| 7742 | asection *sec; |
| 7743 | struct section_list *next; |
| 7744 | struct section_list *prev; |
| 7745 | } |
| 7746 | section_list; |
| 7747 | |
| 7748 | /* Unfortunately we need to keep a list of sections for which |
| 7749 | an _aarch64_elf_section_data structure has been allocated. This |
| 7750 | is because it is possible for functions like elfNN_aarch64_write_section |
| 7751 | to be called on a section which has had an elf_data_structure |
| 7752 | allocated for it (and so the used_by_bfd field is valid) but |
| 7753 | for which the AArch64 extended version of this structure - the |
| 7754 | _aarch64_elf_section_data structure - has not been allocated. */ |
| 7755 | static section_list *sections_with_aarch64_elf_section_data = NULL; |
| 7756 | |
| 7757 | static void |
| 7758 | record_section_with_aarch64_elf_section_data (asection *sec) |
| 7759 | { |
| 7760 | struct section_list *entry; |
| 7761 | |
| 7762 | entry = bfd_malloc (sizeof (*entry)); |
| 7763 | if (entry == NULL) |
| 7764 | return; |
| 7765 | entry->sec = sec; |
| 7766 | entry->next = sections_with_aarch64_elf_section_data; |
| 7767 | entry->prev = NULL; |
| 7768 | if (entry->next != NULL) |
| 7769 | entry->next->prev = entry; |
| 7770 | sections_with_aarch64_elf_section_data = entry; |
| 7771 | } |
| 7772 | |
| 7773 | static struct section_list * |
| 7774 | find_aarch64_elf_section_entry (asection *sec) |
| 7775 | { |
| 7776 | struct section_list *entry; |
| 7777 | static struct section_list *last_entry = NULL; |
| 7778 | |
| 7779 | /* This is a short cut for the typical case where the sections are added |
| 7780 | to the sections_with_aarch64_elf_section_data list in forward order and |
| 7781 | then looked up here in backwards order. This makes a real difference |
| 7782 | to the ld-srec/sec64k.exp linker test. */ |
| 7783 | entry = sections_with_aarch64_elf_section_data; |
| 7784 | if (last_entry != NULL) |
| 7785 | { |
| 7786 | if (last_entry->sec == sec) |
| 7787 | entry = last_entry; |
| 7788 | else if (last_entry->next != NULL && last_entry->next->sec == sec) |
| 7789 | entry = last_entry->next; |
| 7790 | } |
| 7791 | |
| 7792 | for (; entry; entry = entry->next) |
| 7793 | if (entry->sec == sec) |
| 7794 | break; |
| 7795 | |
| 7796 | if (entry) |
| 7797 | /* Record the entry prior to this one - it is the entry we are |
| 7798 | most likely to want to locate next time. Also this way if we |
| 7799 | have been called from |
| 7800 | unrecord_section_with_aarch64_elf_section_data () we will not |
| 7801 | be caching a pointer that is about to be freed. */ |
| 7802 | last_entry = entry->prev; |
| 7803 | |
| 7804 | return entry; |
| 7805 | } |
| 7806 | |
| 7807 | static void |
| 7808 | unrecord_section_with_aarch64_elf_section_data (asection *sec) |
| 7809 | { |
| 7810 | struct section_list *entry; |
| 7811 | |
| 7812 | entry = find_aarch64_elf_section_entry (sec); |
| 7813 | |
| 7814 | if (entry) |
| 7815 | { |
| 7816 | if (entry->prev != NULL) |
| 7817 | entry->prev->next = entry->next; |
| 7818 | if (entry->next != NULL) |
| 7819 | entry->next->prev = entry->prev; |
| 7820 | if (entry == sections_with_aarch64_elf_section_data) |
| 7821 | sections_with_aarch64_elf_section_data = entry->next; |
| 7822 | free (entry); |
| 7823 | } |
| 7824 | } |
| 7825 | |
| 7826 | |
| 7827 | typedef struct |
| 7828 | { |
| 7829 | void *finfo; |
| 7830 | struct bfd_link_info *info; |
| 7831 | asection *sec; |
| 7832 | int sec_shndx; |
| 7833 | int (*func) (void *, const char *, Elf_Internal_Sym *, |
| 7834 | asection *, struct elf_link_hash_entry *); |
| 7835 | } output_arch_syminfo; |
| 7836 | |
| 7837 | enum map_symbol_type |
| 7838 | { |
| 7839 | AARCH64_MAP_INSN, |
| 7840 | AARCH64_MAP_DATA |
| 7841 | }; |
| 7842 | |
| 7843 | |
| 7844 | /* Output a single mapping symbol. */ |
| 7845 | |
| 7846 | static bfd_boolean |
| 7847 | elfNN_aarch64_output_map_sym (output_arch_syminfo *osi, |
| 7848 | enum map_symbol_type type, bfd_vma offset) |
| 7849 | { |
| 7850 | static const char *names[2] = { "$x", "$d" }; |
| 7851 | Elf_Internal_Sym sym; |
| 7852 | |
| 7853 | sym.st_value = (osi->sec->output_section->vma |
| 7854 | + osi->sec->output_offset + offset); |
| 7855 | sym.st_size = 0; |
| 7856 | sym.st_other = 0; |
| 7857 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE); |
| 7858 | sym.st_shndx = osi->sec_shndx; |
| 7859 | return osi->func (osi->finfo, names[type], &sym, osi->sec, NULL) == 1; |
| 7860 | } |
| 7861 | |
| 7862 | /* Output a single local symbol for a generated stub. */ |
| 7863 | |
| 7864 | static bfd_boolean |
| 7865 | elfNN_aarch64_output_stub_sym (output_arch_syminfo *osi, const char *name, |
| 7866 | bfd_vma offset, bfd_vma size) |
| 7867 | { |
| 7868 | Elf_Internal_Sym sym; |
| 7869 | |
| 7870 | sym.st_value = (osi->sec->output_section->vma |
| 7871 | + osi->sec->output_offset + offset); |
| 7872 | sym.st_size = size; |
| 7873 | sym.st_other = 0; |
| 7874 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FUNC); |
| 7875 | sym.st_shndx = osi->sec_shndx; |
| 7876 | return osi->func (osi->finfo, name, &sym, osi->sec, NULL) == 1; |
| 7877 | } |
| 7878 | |
| 7879 | static bfd_boolean |
| 7880 | aarch64_map_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg) |
| 7881 | { |
| 7882 | struct elf_aarch64_stub_hash_entry *stub_entry; |
| 7883 | asection *stub_sec; |
| 7884 | bfd_vma addr; |
| 7885 | char *stub_name; |
| 7886 | output_arch_syminfo *osi; |
| 7887 | |
| 7888 | /* Massage our args to the form they really have. */ |
| 7889 | stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry; |
| 7890 | osi = (output_arch_syminfo *) in_arg; |
| 7891 | |
| 7892 | stub_sec = stub_entry->stub_sec; |
| 7893 | |
| 7894 | /* Ensure this stub is attached to the current section being |
| 7895 | processed. */ |
| 7896 | if (stub_sec != osi->sec) |
| 7897 | return TRUE; |
| 7898 | |
| 7899 | addr = (bfd_vma) stub_entry->stub_offset; |
| 7900 | |
| 7901 | stub_name = stub_entry->output_name; |
| 7902 | |
| 7903 | switch (stub_entry->stub_type) |
| 7904 | { |
| 7905 | case aarch64_stub_adrp_branch: |
| 7906 | if (!elfNN_aarch64_output_stub_sym (osi, stub_name, addr, |
| 7907 | sizeof (aarch64_adrp_branch_stub))) |
| 7908 | return FALSE; |
| 7909 | if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr)) |
| 7910 | return FALSE; |
| 7911 | break; |
| 7912 | case aarch64_stub_long_branch: |
| 7913 | if (!elfNN_aarch64_output_stub_sym |
| 7914 | (osi, stub_name, addr, sizeof (aarch64_long_branch_stub))) |
| 7915 | return FALSE; |
| 7916 | if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr)) |
| 7917 | return FALSE; |
| 7918 | if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_DATA, addr + 16)) |
| 7919 | return FALSE; |
| 7920 | break; |
| 7921 | case aarch64_stub_erratum_835769_veneer: |
| 7922 | if (!elfNN_aarch64_output_stub_sym (osi, stub_name, addr, |
| 7923 | sizeof (aarch64_erratum_835769_stub))) |
| 7924 | return FALSE; |
| 7925 | if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr)) |
| 7926 | return FALSE; |
| 7927 | break; |
| 7928 | case aarch64_stub_erratum_843419_veneer: |
| 7929 | if (!elfNN_aarch64_output_stub_sym (osi, stub_name, addr, |
| 7930 | sizeof (aarch64_erratum_843419_stub))) |
| 7931 | return FALSE; |
| 7932 | if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr)) |
| 7933 | return FALSE; |
| 7934 | break; |
| 7935 | |
| 7936 | default: |
| 7937 | abort (); |
| 7938 | } |
| 7939 | |
| 7940 | return TRUE; |
| 7941 | } |
| 7942 | |
| 7943 | /* Output mapping symbols for linker generated sections. */ |
| 7944 | |
| 7945 | static bfd_boolean |
| 7946 | elfNN_aarch64_output_arch_local_syms (bfd *output_bfd, |
| 7947 | struct bfd_link_info *info, |
| 7948 | void *finfo, |
| 7949 | int (*func) (void *, const char *, |
| 7950 | Elf_Internal_Sym *, |
| 7951 | asection *, |
| 7952 | struct elf_link_hash_entry |
| 7953 | *)) |
| 7954 | { |
| 7955 | output_arch_syminfo osi; |
| 7956 | struct elf_aarch64_link_hash_table *htab; |
| 7957 | |
| 7958 | htab = elf_aarch64_hash_table (info); |
| 7959 | |
| 7960 | osi.finfo = finfo; |
| 7961 | osi.info = info; |
| 7962 | osi.func = func; |
| 7963 | |
| 7964 | /* Long calls stubs. */ |
| 7965 | if (htab->stub_bfd && htab->stub_bfd->sections) |
| 7966 | { |
| 7967 | asection *stub_sec; |
| 7968 | |
| 7969 | for (stub_sec = htab->stub_bfd->sections; |
| 7970 | stub_sec != NULL; stub_sec = stub_sec->next) |
| 7971 | { |
| 7972 | /* Ignore non-stub sections. */ |
| 7973 | if (!strstr (stub_sec->name, STUB_SUFFIX)) |
| 7974 | continue; |
| 7975 | |
| 7976 | osi.sec = stub_sec; |
| 7977 | |
| 7978 | osi.sec_shndx = _bfd_elf_section_from_bfd_section |
| 7979 | (output_bfd, osi.sec->output_section); |
| 7980 | |
| 7981 | /* The first instruction in a stub is always a branch. */ |
| 7982 | if (!elfNN_aarch64_output_map_sym (&osi, AARCH64_MAP_INSN, 0)) |
| 7983 | return FALSE; |
| 7984 | |
| 7985 | bfd_hash_traverse (&htab->stub_hash_table, aarch64_map_one_stub, |
| 7986 | &osi); |
| 7987 | } |
| 7988 | } |
| 7989 | |
| 7990 | /* Finally, output mapping symbols for the PLT. */ |
| 7991 | if (!htab->root.splt || htab->root.splt->size == 0) |
| 7992 | return TRUE; |
| 7993 | |
| 7994 | osi.sec_shndx = _bfd_elf_section_from_bfd_section |
| 7995 | (output_bfd, htab->root.splt->output_section); |
| 7996 | osi.sec = htab->root.splt; |
| 7997 | |
| 7998 | elfNN_aarch64_output_map_sym (&osi, AARCH64_MAP_INSN, 0); |
| 7999 | |
| 8000 | return TRUE; |
| 8001 | |
| 8002 | } |
| 8003 | |
| 8004 | /* Allocate target specific section data. */ |
| 8005 | |
| 8006 | static bfd_boolean |
| 8007 | elfNN_aarch64_new_section_hook (bfd *abfd, asection *sec) |
| 8008 | { |
| 8009 | if (!sec->used_by_bfd) |
| 8010 | { |
| 8011 | _aarch64_elf_section_data *sdata; |
| 8012 | bfd_size_type amt = sizeof (*sdata); |
| 8013 | |
| 8014 | sdata = bfd_zalloc (abfd, amt); |
| 8015 | if (sdata == NULL) |
| 8016 | return FALSE; |
| 8017 | sec->used_by_bfd = sdata; |
| 8018 | } |
| 8019 | |
| 8020 | record_section_with_aarch64_elf_section_data (sec); |
| 8021 | |
| 8022 | return _bfd_elf_new_section_hook (abfd, sec); |
| 8023 | } |
| 8024 | |
| 8025 | |
| 8026 | static void |
| 8027 | unrecord_section_via_map_over_sections (bfd *abfd ATTRIBUTE_UNUSED, |
| 8028 | asection *sec, |
| 8029 | void *ignore ATTRIBUTE_UNUSED) |
| 8030 | { |
| 8031 | unrecord_section_with_aarch64_elf_section_data (sec); |
| 8032 | } |
| 8033 | |
| 8034 | static bfd_boolean |
| 8035 | elfNN_aarch64_close_and_cleanup (bfd *abfd) |
| 8036 | { |
| 8037 | if (abfd->sections) |
| 8038 | bfd_map_over_sections (abfd, |
| 8039 | unrecord_section_via_map_over_sections, NULL); |
| 8040 | |
| 8041 | return _bfd_elf_close_and_cleanup (abfd); |
| 8042 | } |
| 8043 | |
| 8044 | static bfd_boolean |
| 8045 | elfNN_aarch64_bfd_free_cached_info (bfd *abfd) |
| 8046 | { |
| 8047 | if (abfd->sections) |
| 8048 | bfd_map_over_sections (abfd, |
| 8049 | unrecord_section_via_map_over_sections, NULL); |
| 8050 | |
| 8051 | return _bfd_free_cached_info (abfd); |
| 8052 | } |
| 8053 | |
| 8054 | /* Create dynamic sections. This is different from the ARM backend in that |
| 8055 | the got, plt, gotplt and their relocation sections are all created in the |
| 8056 | standard part of the bfd elf backend. */ |
| 8057 | |
| 8058 | static bfd_boolean |
| 8059 | elfNN_aarch64_create_dynamic_sections (bfd *dynobj, |
| 8060 | struct bfd_link_info *info) |
| 8061 | { |
| 8062 | /* We need to create .got section. */ |
| 8063 | if (!aarch64_elf_create_got_section (dynobj, info)) |
| 8064 | return FALSE; |
| 8065 | |
| 8066 | return _bfd_elf_create_dynamic_sections (dynobj, info); |
| 8067 | } |
| 8068 | |
| 8069 | |
| 8070 | /* Allocate space in .plt, .got and associated reloc sections for |
| 8071 | dynamic relocs. */ |
| 8072 | |
| 8073 | static bfd_boolean |
| 8074 | elfNN_aarch64_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) |
| 8075 | { |
| 8076 | struct bfd_link_info *info; |
| 8077 | struct elf_aarch64_link_hash_table *htab; |
| 8078 | struct elf_aarch64_link_hash_entry *eh; |
| 8079 | struct elf_dyn_relocs *p; |
| 8080 | |
| 8081 | /* An example of a bfd_link_hash_indirect symbol is versioned |
| 8082 | symbol. For example: __gxx_personality_v0(bfd_link_hash_indirect) |
| 8083 | -> __gxx_personality_v0(bfd_link_hash_defined) |
| 8084 | |
| 8085 | There is no need to process bfd_link_hash_indirect symbols here |
| 8086 | because we will also be presented with the concrete instance of |
| 8087 | the symbol and elfNN_aarch64_copy_indirect_symbol () will have been |
| 8088 | called to copy all relevant data from the generic to the concrete |
| 8089 | symbol instance. */ |
| 8090 | if (h->root.type == bfd_link_hash_indirect) |
| 8091 | return TRUE; |
| 8092 | |
| 8093 | if (h->root.type == bfd_link_hash_warning) |
| 8094 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 8095 | |
| 8096 | info = (struct bfd_link_info *) inf; |
| 8097 | htab = elf_aarch64_hash_table (info); |
| 8098 | |
| 8099 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it |
| 8100 | here if it is defined and referenced in a non-shared object. */ |
| 8101 | if (h->type == STT_GNU_IFUNC |
| 8102 | && h->def_regular) |
| 8103 | return TRUE; |
| 8104 | else if (htab->root.dynamic_sections_created && h->plt.refcount > 0) |
| 8105 | { |
| 8106 | /* Make sure this symbol is output as a dynamic symbol. |
| 8107 | Undefined weak syms won't yet be marked as dynamic. */ |
| 8108 | if (h->dynindx == -1 && !h->forced_local |
| 8109 | && h->root.type == bfd_link_hash_undefweak) |
| 8110 | { |
| 8111 | if (!bfd_elf_link_record_dynamic_symbol (info, h)) |
| 8112 | return FALSE; |
| 8113 | } |
| 8114 | |
| 8115 | if (bfd_link_pic (info) || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) |
| 8116 | { |
| 8117 | asection *s = htab->root.splt; |
| 8118 | |
| 8119 | /* If this is the first .plt entry, make room for the special |
| 8120 | first entry. */ |
| 8121 | if (s->size == 0) |
| 8122 | s->size += htab->plt_header_size; |
| 8123 | |
| 8124 | h->plt.offset = s->size; |
| 8125 | |
| 8126 | /* If this symbol is not defined in a regular file, and we are |
| 8127 | not generating a shared library, then set the symbol to this |
| 8128 | location in the .plt. This is required to make function |
| 8129 | pointers compare as equal between the normal executable and |
| 8130 | the shared library. */ |
| 8131 | if (!bfd_link_pic (info) && !h->def_regular) |
| 8132 | { |
| 8133 | h->root.u.def.section = s; |
| 8134 | h->root.u.def.value = h->plt.offset; |
| 8135 | } |
| 8136 | |
| 8137 | /* Make room for this entry. For now we only create the |
| 8138 | small model PLT entries. We later need to find a way |
| 8139 | of relaxing into these from the large model PLT entries. */ |
| 8140 | s->size += PLT_SMALL_ENTRY_SIZE; |
| 8141 | |
| 8142 | /* We also need to make an entry in the .got.plt section, which |
| 8143 | will be placed in the .got section by the linker script. */ |
| 8144 | htab->root.sgotplt->size += GOT_ENTRY_SIZE; |
| 8145 | |
| 8146 | /* We also need to make an entry in the .rela.plt section. */ |
| 8147 | htab->root.srelplt->size += RELOC_SIZE (htab); |
| 8148 | |
| 8149 | /* We need to ensure that all GOT entries that serve the PLT |
| 8150 | are consecutive with the special GOT slots [0] [1] and |
| 8151 | [2]. Any addtional relocations, such as |
| 8152 | R_AARCH64_TLSDESC, must be placed after the PLT related |
| 8153 | entries. We abuse the reloc_count such that during |
| 8154 | sizing we adjust reloc_count to indicate the number of |
| 8155 | PLT related reserved entries. In subsequent phases when |
| 8156 | filling in the contents of the reloc entries, PLT related |
| 8157 | entries are placed by computing their PLT index (0 |
| 8158 | .. reloc_count). While other none PLT relocs are placed |
| 8159 | at the slot indicated by reloc_count and reloc_count is |
| 8160 | updated. */ |
| 8161 | |
| 8162 | htab->root.srelplt->reloc_count++; |
| 8163 | } |
| 8164 | else |
| 8165 | { |
| 8166 | h->plt.offset = (bfd_vma) - 1; |
| 8167 | h->needs_plt = 0; |
| 8168 | } |
| 8169 | } |
| 8170 | else |
| 8171 | { |
| 8172 | h->plt.offset = (bfd_vma) - 1; |
| 8173 | h->needs_plt = 0; |
| 8174 | } |
| 8175 | |
| 8176 | eh = (struct elf_aarch64_link_hash_entry *) h; |
| 8177 | eh->tlsdesc_got_jump_table_offset = (bfd_vma) - 1; |
| 8178 | |
| 8179 | if (h->got.refcount > 0) |
| 8180 | { |
| 8181 | bfd_boolean dyn; |
| 8182 | unsigned got_type = elf_aarch64_hash_entry (h)->got_type; |
| 8183 | |
| 8184 | h->got.offset = (bfd_vma) - 1; |
| 8185 | |
| 8186 | dyn = htab->root.dynamic_sections_created; |
| 8187 | |
| 8188 | /* Make sure this symbol is output as a dynamic symbol. |
| 8189 | Undefined weak syms won't yet be marked as dynamic. */ |
| 8190 | if (dyn && h->dynindx == -1 && !h->forced_local |
| 8191 | && h->root.type == bfd_link_hash_undefweak) |
| 8192 | { |
| 8193 | if (!bfd_elf_link_record_dynamic_symbol (info, h)) |
| 8194 | return FALSE; |
| 8195 | } |
| 8196 | |
| 8197 | if (got_type == GOT_UNKNOWN) |
| 8198 | { |
| 8199 | } |
| 8200 | else if (got_type == GOT_NORMAL) |
| 8201 | { |
| 8202 | h->got.offset = htab->root.sgot->size; |
| 8203 | htab->root.sgot->size += GOT_ENTRY_SIZE; |
| 8204 | if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 8205 | || h->root.type != bfd_link_hash_undefweak) |
| 8206 | && (bfd_link_pic (info) |
| 8207 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)) |
| 8208 | /* Undefined weak symbol in static PIE resolves to 0 without |
| 8209 | any dynamic relocations. */ |
| 8210 | && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) |
| 8211 | { |
| 8212 | htab->root.srelgot->size += RELOC_SIZE (htab); |
| 8213 | } |
| 8214 | } |
| 8215 | else |
| 8216 | { |
| 8217 | int indx; |
| 8218 | if (got_type & GOT_TLSDESC_GD) |
| 8219 | { |
| 8220 | eh->tlsdesc_got_jump_table_offset = |
| 8221 | (htab->root.sgotplt->size |
| 8222 | - aarch64_compute_jump_table_size (htab)); |
| 8223 | htab->root.sgotplt->size += GOT_ENTRY_SIZE * 2; |
| 8224 | h->got.offset = (bfd_vma) - 2; |
| 8225 | } |
| 8226 | |
| 8227 | if (got_type & GOT_TLS_GD) |
| 8228 | { |
| 8229 | h->got.offset = htab->root.sgot->size; |
| 8230 | htab->root.sgot->size += GOT_ENTRY_SIZE * 2; |
| 8231 | } |
| 8232 | |
| 8233 | if (got_type & GOT_TLS_IE) |
| 8234 | { |
| 8235 | h->got.offset = htab->root.sgot->size; |
| 8236 | htab->root.sgot->size += GOT_ENTRY_SIZE; |
| 8237 | } |
| 8238 | |
| 8239 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
| 8240 | if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 8241 | || h->root.type != bfd_link_hash_undefweak) |
| 8242 | && (!bfd_link_executable (info) |
| 8243 | || indx != 0 |
| 8244 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) |
| 8245 | { |
| 8246 | if (got_type & GOT_TLSDESC_GD) |
| 8247 | { |
| 8248 | htab->root.srelplt->size += RELOC_SIZE (htab); |
| 8249 | /* Note reloc_count not incremented here! We have |
| 8250 | already adjusted reloc_count for this relocation |
| 8251 | type. */ |
| 8252 | |
| 8253 | /* TLSDESC PLT is now needed, but not yet determined. */ |
| 8254 | htab->tlsdesc_plt = (bfd_vma) - 1; |
| 8255 | } |
| 8256 | |
| 8257 | if (got_type & GOT_TLS_GD) |
| 8258 | htab->root.srelgot->size += RELOC_SIZE (htab) * 2; |
| 8259 | |
| 8260 | if (got_type & GOT_TLS_IE) |
| 8261 | htab->root.srelgot->size += RELOC_SIZE (htab); |
| 8262 | } |
| 8263 | } |
| 8264 | } |
| 8265 | else |
| 8266 | { |
| 8267 | h->got.offset = (bfd_vma) - 1; |
| 8268 | } |
| 8269 | |
| 8270 | if (eh->dyn_relocs == NULL) |
| 8271 | return TRUE; |
| 8272 | |
| 8273 | /* In the shared -Bsymbolic case, discard space allocated for |
| 8274 | dynamic pc-relative relocs against symbols which turn out to be |
| 8275 | defined in regular objects. For the normal shared case, discard |
| 8276 | space for pc-relative relocs that have become local due to symbol |
| 8277 | visibility changes. */ |
| 8278 | |
| 8279 | if (bfd_link_pic (info)) |
| 8280 | { |
| 8281 | /* Relocs that use pc_count are those that appear on a call |
| 8282 | insn, or certain REL relocs that can generated via assembly. |
| 8283 | We want calls to protected symbols to resolve directly to the |
| 8284 | function rather than going via the plt. If people want |
| 8285 | function pointer comparisons to work as expected then they |
| 8286 | should avoid writing weird assembly. */ |
| 8287 | if (SYMBOL_CALLS_LOCAL (info, h)) |
| 8288 | { |
| 8289 | struct elf_dyn_relocs **pp; |
| 8290 | |
| 8291 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL;) |
| 8292 | { |
| 8293 | p->count -= p->pc_count; |
| 8294 | p->pc_count = 0; |
| 8295 | if (p->count == 0) |
| 8296 | *pp = p->next; |
| 8297 | else |
| 8298 | pp = &p->next; |
| 8299 | } |
| 8300 | } |
| 8301 | |
| 8302 | /* Also discard relocs on undefined weak syms with non-default |
| 8303 | visibility. */ |
| 8304 | if (eh->dyn_relocs != NULL && h->root.type == bfd_link_hash_undefweak) |
| 8305 | { |
| 8306 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
| 8307 | || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) |
| 8308 | eh->dyn_relocs = NULL; |
| 8309 | |
| 8310 | /* Make sure undefined weak symbols are output as a dynamic |
| 8311 | symbol in PIEs. */ |
| 8312 | else if (h->dynindx == -1 |
| 8313 | && !h->forced_local |
| 8314 | && h->root.type == bfd_link_hash_undefweak |
| 8315 | && !bfd_elf_link_record_dynamic_symbol (info, h)) |
| 8316 | return FALSE; |
| 8317 | } |
| 8318 | |
| 8319 | } |
| 8320 | else if (ELIMINATE_COPY_RELOCS) |
| 8321 | { |
| 8322 | /* For the non-shared case, discard space for relocs against |
| 8323 | symbols which turn out to need copy relocs or are not |
| 8324 | dynamic. */ |
| 8325 | |
| 8326 | if (!h->non_got_ref |
| 8327 | && ((h->def_dynamic |
| 8328 | && !h->def_regular) |
| 8329 | || (htab->root.dynamic_sections_created |
| 8330 | && (h->root.type == bfd_link_hash_undefweak |
| 8331 | || h->root.type == bfd_link_hash_undefined)))) |
| 8332 | { |
| 8333 | /* Make sure this symbol is output as a dynamic symbol. |
| 8334 | Undefined weak syms won't yet be marked as dynamic. */ |
| 8335 | if (h->dynindx == -1 |
| 8336 | && !h->forced_local |
| 8337 | && h->root.type == bfd_link_hash_undefweak |
| 8338 | && !bfd_elf_link_record_dynamic_symbol (info, h)) |
| 8339 | return FALSE; |
| 8340 | |
| 8341 | /* If that succeeded, we know we'll be keeping all the |
| 8342 | relocs. */ |
| 8343 | if (h->dynindx != -1) |
| 8344 | goto keep; |
| 8345 | } |
| 8346 | |
| 8347 | eh->dyn_relocs = NULL; |
| 8348 | |
| 8349 | keep:; |
| 8350 | } |
| 8351 | |
| 8352 | /* Finally, allocate space. */ |
| 8353 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
| 8354 | { |
| 8355 | asection *sreloc; |
| 8356 | |
| 8357 | sreloc = elf_section_data (p->sec)->sreloc; |
| 8358 | |
| 8359 | BFD_ASSERT (sreloc != NULL); |
| 8360 | |
| 8361 | sreloc->size += p->count * RELOC_SIZE (htab); |
| 8362 | } |
| 8363 | |
| 8364 | return TRUE; |
| 8365 | } |
| 8366 | |
| 8367 | /* Allocate space in .plt, .got and associated reloc sections for |
| 8368 | ifunc dynamic relocs. */ |
| 8369 | |
| 8370 | static bfd_boolean |
| 8371 | elfNN_aarch64_allocate_ifunc_dynrelocs (struct elf_link_hash_entry *h, |
| 8372 | void *inf) |
| 8373 | { |
| 8374 | struct bfd_link_info *info; |
| 8375 | struct elf_aarch64_link_hash_table *htab; |
| 8376 | struct elf_aarch64_link_hash_entry *eh; |
| 8377 | |
| 8378 | /* An example of a bfd_link_hash_indirect symbol is versioned |
| 8379 | symbol. For example: __gxx_personality_v0(bfd_link_hash_indirect) |
| 8380 | -> __gxx_personality_v0(bfd_link_hash_defined) |
| 8381 | |
| 8382 | There is no need to process bfd_link_hash_indirect symbols here |
| 8383 | because we will also be presented with the concrete instance of |
| 8384 | the symbol and elfNN_aarch64_copy_indirect_symbol () will have been |
| 8385 | called to copy all relevant data from the generic to the concrete |
| 8386 | symbol instance. */ |
| 8387 | if (h->root.type == bfd_link_hash_indirect) |
| 8388 | return TRUE; |
| 8389 | |
| 8390 | if (h->root.type == bfd_link_hash_warning) |
| 8391 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 8392 | |
| 8393 | info = (struct bfd_link_info *) inf; |
| 8394 | htab = elf_aarch64_hash_table (info); |
| 8395 | |
| 8396 | eh = (struct elf_aarch64_link_hash_entry *) h; |
| 8397 | |
| 8398 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it |
| 8399 | here if it is defined and referenced in a non-shared object. */ |
| 8400 | if (h->type == STT_GNU_IFUNC |
| 8401 | && h->def_regular) |
| 8402 | return _bfd_elf_allocate_ifunc_dyn_relocs (info, h, |
| 8403 | &eh->dyn_relocs, |
| 8404 | NULL, |
| 8405 | htab->plt_entry_size, |
| 8406 | htab->plt_header_size, |
| 8407 | GOT_ENTRY_SIZE, |
| 8408 | FALSE); |
| 8409 | return TRUE; |
| 8410 | } |
| 8411 | |
| 8412 | /* Allocate space in .plt, .got and associated reloc sections for |
| 8413 | local dynamic relocs. */ |
| 8414 | |
| 8415 | static bfd_boolean |
| 8416 | elfNN_aarch64_allocate_local_dynrelocs (void **slot, void *inf) |
| 8417 | { |
| 8418 | struct elf_link_hash_entry *h |
| 8419 | = (struct elf_link_hash_entry *) *slot; |
| 8420 | |
| 8421 | if (h->type != STT_GNU_IFUNC |
| 8422 | || !h->def_regular |
| 8423 | || !h->ref_regular |
| 8424 | || !h->forced_local |
| 8425 | || h->root.type != bfd_link_hash_defined) |
| 8426 | abort (); |
| 8427 | |
| 8428 | return elfNN_aarch64_allocate_dynrelocs (h, inf); |
| 8429 | } |
| 8430 | |
| 8431 | /* Allocate space in .plt, .got and associated reloc sections for |
| 8432 | local ifunc dynamic relocs. */ |
| 8433 | |
| 8434 | static bfd_boolean |
| 8435 | elfNN_aarch64_allocate_local_ifunc_dynrelocs (void **slot, void *inf) |
| 8436 | { |
| 8437 | struct elf_link_hash_entry *h |
| 8438 | = (struct elf_link_hash_entry *) *slot; |
| 8439 | |
| 8440 | if (h->type != STT_GNU_IFUNC |
| 8441 | || !h->def_regular |
| 8442 | || !h->ref_regular |
| 8443 | || !h->forced_local |
| 8444 | || h->root.type != bfd_link_hash_defined) |
| 8445 | abort (); |
| 8446 | |
| 8447 | return elfNN_aarch64_allocate_ifunc_dynrelocs (h, inf); |
| 8448 | } |
| 8449 | |
| 8450 | /* Set DF_TEXTREL if we find any dynamic relocs that apply to |
| 8451 | read-only sections. */ |
| 8452 | |
| 8453 | static bfd_boolean |
| 8454 | maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p) |
| 8455 | { |
| 8456 | asection *sec; |
| 8457 | |
| 8458 | if (h->root.type == bfd_link_hash_indirect) |
| 8459 | return TRUE; |
| 8460 | |
| 8461 | sec = readonly_dynrelocs (h); |
| 8462 | if (sec != NULL) |
| 8463 | { |
| 8464 | struct bfd_link_info *info = (struct bfd_link_info *) info_p; |
| 8465 | |
| 8466 | info->flags |= DF_TEXTREL; |
| 8467 | info->callbacks->minfo |
| 8468 | (_("%pB: dynamic relocation against `%pT' in read-only section `%pA'\n"), |
| 8469 | sec->owner, h->root.root.string, sec); |
| 8470 | |
| 8471 | /* Not an error, just cut short the traversal. */ |
| 8472 | return FALSE; |
| 8473 | } |
| 8474 | return TRUE; |
| 8475 | } |
| 8476 | |
| 8477 | /* This is the most important function of all . Innocuosly named |
| 8478 | though ! */ |
| 8479 | |
| 8480 | static bfd_boolean |
| 8481 | elfNN_aarch64_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, |
| 8482 | struct bfd_link_info *info) |
| 8483 | { |
| 8484 | struct elf_aarch64_link_hash_table *htab; |
| 8485 | bfd *dynobj; |
| 8486 | asection *s; |
| 8487 | bfd_boolean relocs; |
| 8488 | bfd *ibfd; |
| 8489 | |
| 8490 | htab = elf_aarch64_hash_table ((info)); |
| 8491 | dynobj = htab->root.dynobj; |
| 8492 | |
| 8493 | BFD_ASSERT (dynobj != NULL); |
| 8494 | |
| 8495 | if (htab->root.dynamic_sections_created) |
| 8496 | { |
| 8497 | if (bfd_link_executable (info) && !info->nointerp) |
| 8498 | { |
| 8499 | s = bfd_get_linker_section (dynobj, ".interp"); |
| 8500 | if (s == NULL) |
| 8501 | abort (); |
| 8502 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
| 8503 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
| 8504 | } |
| 8505 | } |
| 8506 | |
| 8507 | /* Set up .got offsets for local syms, and space for local dynamic |
| 8508 | relocs. */ |
| 8509 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
| 8510 | { |
| 8511 | struct elf_aarch64_local_symbol *locals = NULL; |
| 8512 | Elf_Internal_Shdr *symtab_hdr; |
| 8513 | asection *srel; |
| 8514 | unsigned int i; |
| 8515 | |
| 8516 | if (!is_aarch64_elf (ibfd)) |
| 8517 | continue; |
| 8518 | |
| 8519 | for (s = ibfd->sections; s != NULL; s = s->next) |
| 8520 | { |
| 8521 | struct elf_dyn_relocs *p; |
| 8522 | |
| 8523 | for (p = (struct elf_dyn_relocs *) |
| 8524 | (elf_section_data (s)->local_dynrel); p != NULL; p = p->next) |
| 8525 | { |
| 8526 | if (!bfd_is_abs_section (p->sec) |
| 8527 | && bfd_is_abs_section (p->sec->output_section)) |
| 8528 | { |
| 8529 | /* Input section has been discarded, either because |
| 8530 | it is a copy of a linkonce section or due to |
| 8531 | linker script /DISCARD/, so we'll be discarding |
| 8532 | the relocs too. */ |
| 8533 | } |
| 8534 | else if (p->count != 0) |
| 8535 | { |
| 8536 | srel = elf_section_data (p->sec)->sreloc; |
| 8537 | srel->size += p->count * RELOC_SIZE (htab); |
| 8538 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) |
| 8539 | info->flags |= DF_TEXTREL; |
| 8540 | } |
| 8541 | } |
| 8542 | } |
| 8543 | |
| 8544 | locals = elf_aarch64_locals (ibfd); |
| 8545 | if (!locals) |
| 8546 | continue; |
| 8547 | |
| 8548 | symtab_hdr = &elf_symtab_hdr (ibfd); |
| 8549 | srel = htab->root.srelgot; |
| 8550 | for (i = 0; i < symtab_hdr->sh_info; i++) |
| 8551 | { |
| 8552 | locals[i].got_offset = (bfd_vma) - 1; |
| 8553 | locals[i].tlsdesc_got_jump_table_offset = (bfd_vma) - 1; |
| 8554 | if (locals[i].got_refcount > 0) |
| 8555 | { |
| 8556 | unsigned got_type = locals[i].got_type; |
| 8557 | if (got_type & GOT_TLSDESC_GD) |
| 8558 | { |
| 8559 | locals[i].tlsdesc_got_jump_table_offset = |
| 8560 | (htab->root.sgotplt->size |
| 8561 | - aarch64_compute_jump_table_size (htab)); |
| 8562 | htab->root.sgotplt->size += GOT_ENTRY_SIZE * 2; |
| 8563 | locals[i].got_offset = (bfd_vma) - 2; |
| 8564 | } |
| 8565 | |
| 8566 | if (got_type & GOT_TLS_GD) |
| 8567 | { |
| 8568 | locals[i].got_offset = htab->root.sgot->size; |
| 8569 | htab->root.sgot->size += GOT_ENTRY_SIZE * 2; |
| 8570 | } |
| 8571 | |
| 8572 | if (got_type & GOT_TLS_IE |
| 8573 | || got_type & GOT_NORMAL) |
| 8574 | { |
| 8575 | locals[i].got_offset = htab->root.sgot->size; |
| 8576 | htab->root.sgot->size += GOT_ENTRY_SIZE; |
| 8577 | } |
| 8578 | |
| 8579 | if (got_type == GOT_UNKNOWN) |
| 8580 | { |
| 8581 | } |
| 8582 | |
| 8583 | if (bfd_link_pic (info)) |
| 8584 | { |
| 8585 | if (got_type & GOT_TLSDESC_GD) |
| 8586 | { |
| 8587 | htab->root.srelplt->size += RELOC_SIZE (htab); |
| 8588 | /* Note RELOC_COUNT not incremented here! */ |
| 8589 | htab->tlsdesc_plt = (bfd_vma) - 1; |
| 8590 | } |
| 8591 | |
| 8592 | if (got_type & GOT_TLS_GD) |
| 8593 | htab->root.srelgot->size += RELOC_SIZE (htab) * 2; |
| 8594 | |
| 8595 | if (got_type & GOT_TLS_IE |
| 8596 | || got_type & GOT_NORMAL) |
| 8597 | htab->root.srelgot->size += RELOC_SIZE (htab); |
| 8598 | } |
| 8599 | } |
| 8600 | else |
| 8601 | { |
| 8602 | locals[i].got_refcount = (bfd_vma) - 1; |
| 8603 | } |
| 8604 | } |
| 8605 | } |
| 8606 | |
| 8607 | |
| 8608 | /* Allocate global sym .plt and .got entries, and space for global |
| 8609 | sym dynamic relocs. */ |
| 8610 | elf_link_hash_traverse (&htab->root, elfNN_aarch64_allocate_dynrelocs, |
| 8611 | info); |
| 8612 | |
| 8613 | /* Allocate global ifunc sym .plt and .got entries, and space for global |
| 8614 | ifunc sym dynamic relocs. */ |
| 8615 | elf_link_hash_traverse (&htab->root, elfNN_aarch64_allocate_ifunc_dynrelocs, |
| 8616 | info); |
| 8617 | |
| 8618 | /* Allocate .plt and .got entries, and space for local symbols. */ |
| 8619 | htab_traverse (htab->loc_hash_table, |
| 8620 | elfNN_aarch64_allocate_local_dynrelocs, |
| 8621 | info); |
| 8622 | |
| 8623 | /* Allocate .plt and .got entries, and space for local ifunc symbols. */ |
| 8624 | htab_traverse (htab->loc_hash_table, |
| 8625 | elfNN_aarch64_allocate_local_ifunc_dynrelocs, |
| 8626 | info); |
| 8627 | |
| 8628 | /* For every jump slot reserved in the sgotplt, reloc_count is |
| 8629 | incremented. However, when we reserve space for TLS descriptors, |
| 8630 | it's not incremented, so in order to compute the space reserved |
| 8631 | for them, it suffices to multiply the reloc count by the jump |
| 8632 | slot size. */ |
| 8633 | |
| 8634 | if (htab->root.srelplt) |
| 8635 | htab->sgotplt_jump_table_size = aarch64_compute_jump_table_size (htab); |
| 8636 | |
| 8637 | if (htab->tlsdesc_plt) |
| 8638 | { |
| 8639 | if (htab->root.splt->size == 0) |
| 8640 | htab->root.splt->size += PLT_ENTRY_SIZE; |
| 8641 | |
| 8642 | htab->tlsdesc_plt = htab->root.splt->size; |
| 8643 | htab->root.splt->size += PLT_TLSDESC_ENTRY_SIZE; |
| 8644 | |
| 8645 | /* If we're not using lazy TLS relocations, don't generate the |
| 8646 | GOT entry required. */ |
| 8647 | if (!(info->flags & DF_BIND_NOW)) |
| 8648 | { |
| 8649 | htab->dt_tlsdesc_got = htab->root.sgot->size; |
| 8650 | htab->root.sgot->size += GOT_ENTRY_SIZE; |
| 8651 | } |
| 8652 | } |
| 8653 | |
| 8654 | /* Init mapping symbols information to use later to distingush between |
| 8655 | code and data while scanning for errata. */ |
| 8656 | if (htab->fix_erratum_835769 || htab->fix_erratum_843419) |
| 8657 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
| 8658 | { |
| 8659 | if (!is_aarch64_elf (ibfd)) |
| 8660 | continue; |
| 8661 | bfd_elfNN_aarch64_init_maps (ibfd); |
| 8662 | } |
| 8663 | |
| 8664 | /* We now have determined the sizes of the various dynamic sections. |
| 8665 | Allocate memory for them. */ |
| 8666 | relocs = FALSE; |
| 8667 | for (s = dynobj->sections; s != NULL; s = s->next) |
| 8668 | { |
| 8669 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
| 8670 | continue; |
| 8671 | |
| 8672 | if (s == htab->root.splt |
| 8673 | || s == htab->root.sgot |
| 8674 | || s == htab->root.sgotplt |
| 8675 | || s == htab->root.iplt |
| 8676 | || s == htab->root.igotplt |
| 8677 | || s == htab->root.sdynbss |
| 8678 | || s == htab->root.sdynrelro) |
| 8679 | { |
| 8680 | /* Strip this section if we don't need it; see the |
| 8681 | comment below. */ |
| 8682 | } |
| 8683 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) |
| 8684 | { |
| 8685 | if (s->size != 0 && s != htab->root.srelplt) |
| 8686 | relocs = TRUE; |
| 8687 | |
| 8688 | /* We use the reloc_count field as a counter if we need |
| 8689 | to copy relocs into the output file. */ |
| 8690 | if (s != htab->root.srelplt) |
| 8691 | s->reloc_count = 0; |
| 8692 | } |
| 8693 | else |
| 8694 | { |
| 8695 | /* It's not one of our sections, so don't allocate space. */ |
| 8696 | continue; |
| 8697 | } |
| 8698 | |
| 8699 | if (s->size == 0) |
| 8700 | { |
| 8701 | /* If we don't need this section, strip it from the |
| 8702 | output file. This is mostly to handle .rela.bss and |
| 8703 | .rela.plt. We must create both sections in |
| 8704 | create_dynamic_sections, because they must be created |
| 8705 | before the linker maps input sections to output |
| 8706 | sections. The linker does that before |
| 8707 | adjust_dynamic_symbol is called, and it is that |
| 8708 | function which decides whether anything needs to go |
| 8709 | into these sections. */ |
| 8710 | s->flags |= SEC_EXCLUDE; |
| 8711 | continue; |
| 8712 | } |
| 8713 | |
| 8714 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
| 8715 | continue; |
| 8716 | |
| 8717 | /* Allocate memory for the section contents. We use bfd_zalloc |
| 8718 | here in case unused entries are not reclaimed before the |
| 8719 | section's contents are written out. This should not happen, |
| 8720 | but this way if it does, we get a R_AARCH64_NONE reloc instead |
| 8721 | of garbage. */ |
| 8722 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
| 8723 | if (s->contents == NULL) |
| 8724 | return FALSE; |
| 8725 | } |
| 8726 | |
| 8727 | if (htab->root.dynamic_sections_created) |
| 8728 | { |
| 8729 | /* Add some entries to the .dynamic section. We fill in the |
| 8730 | values later, in elfNN_aarch64_finish_dynamic_sections, but we |
| 8731 | must add the entries now so that we get the correct size for |
| 8732 | the .dynamic section. The DT_DEBUG entry is filled in by the |
| 8733 | dynamic linker and used by the debugger. */ |
| 8734 | #define add_dynamic_entry(TAG, VAL) \ |
| 8735 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
| 8736 | |
| 8737 | if (bfd_link_executable (info)) |
| 8738 | { |
| 8739 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
| 8740 | return FALSE; |
| 8741 | } |
| 8742 | |
| 8743 | if (htab->root.splt->size != 0) |
| 8744 | { |
| 8745 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
| 8746 | || !add_dynamic_entry (DT_PLTRELSZ, 0) |
| 8747 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) |
| 8748 | || !add_dynamic_entry (DT_JMPREL, 0)) |
| 8749 | return FALSE; |
| 8750 | |
| 8751 | if (htab->tlsdesc_plt |
| 8752 | && (!add_dynamic_entry (DT_TLSDESC_PLT, 0) |
| 8753 | || !add_dynamic_entry (DT_TLSDESC_GOT, 0))) |
| 8754 | return FALSE; |
| 8755 | } |
| 8756 | |
| 8757 | if (relocs) |
| 8758 | { |
| 8759 | if (!add_dynamic_entry (DT_RELA, 0) |
| 8760 | || !add_dynamic_entry (DT_RELASZ, 0) |
| 8761 | || !add_dynamic_entry (DT_RELAENT, RELOC_SIZE (htab))) |
| 8762 | return FALSE; |
| 8763 | |
| 8764 | /* If any dynamic relocs apply to a read-only section, |
| 8765 | then we need a DT_TEXTREL entry. */ |
| 8766 | if ((info->flags & DF_TEXTREL) == 0) |
| 8767 | elf_link_hash_traverse (&htab->root, maybe_set_textrel, info); |
| 8768 | |
| 8769 | if ((info->flags & DF_TEXTREL) != 0) |
| 8770 | { |
| 8771 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
| 8772 | return FALSE; |
| 8773 | } |
| 8774 | } |
| 8775 | } |
| 8776 | #undef add_dynamic_entry |
| 8777 | |
| 8778 | return TRUE; |
| 8779 | } |
| 8780 | |
| 8781 | static inline void |
| 8782 | elf_aarch64_update_plt_entry (bfd *output_bfd, |
| 8783 | bfd_reloc_code_real_type r_type, |
| 8784 | bfd_byte *plt_entry, bfd_vma value) |
| 8785 | { |
| 8786 | reloc_howto_type *howto = elfNN_aarch64_howto_from_bfd_reloc (r_type); |
| 8787 | |
| 8788 | /* FIXME: We should check the return value from this function call. */ |
| 8789 | (void) _bfd_aarch64_elf_put_addend (output_bfd, plt_entry, r_type, howto, value); |
| 8790 | } |
| 8791 | |
| 8792 | static void |
| 8793 | elfNN_aarch64_create_small_pltn_entry (struct elf_link_hash_entry *h, |
| 8794 | struct elf_aarch64_link_hash_table |
| 8795 | *htab, bfd *output_bfd, |
| 8796 | struct bfd_link_info *info) |
| 8797 | { |
| 8798 | bfd_byte *plt_entry; |
| 8799 | bfd_vma plt_index; |
| 8800 | bfd_vma got_offset; |
| 8801 | bfd_vma gotplt_entry_address; |
| 8802 | bfd_vma plt_entry_address; |
| 8803 | Elf_Internal_Rela rela; |
| 8804 | bfd_byte *loc; |
| 8805 | asection *plt, *gotplt, *relplt; |
| 8806 | |
| 8807 | /* When building a static executable, use .iplt, .igot.plt and |
| 8808 | .rela.iplt sections for STT_GNU_IFUNC symbols. */ |
| 8809 | if (htab->root.splt != NULL) |
| 8810 | { |
| 8811 | plt = htab->root.splt; |
| 8812 | gotplt = htab->root.sgotplt; |
| 8813 | relplt = htab->root.srelplt; |
| 8814 | } |
| 8815 | else |
| 8816 | { |
| 8817 | plt = htab->root.iplt; |
| 8818 | gotplt = htab->root.igotplt; |
| 8819 | relplt = htab->root.irelplt; |
| 8820 | } |
| 8821 | |
| 8822 | /* Get the index in the procedure linkage table which |
| 8823 | corresponds to this symbol. This is the index of this symbol |
| 8824 | in all the symbols for which we are making plt entries. The |
| 8825 | first entry in the procedure linkage table is reserved. |
| 8826 | |
| 8827 | Get the offset into the .got table of the entry that |
| 8828 | corresponds to this function. Each .got entry is GOT_ENTRY_SIZE |
| 8829 | bytes. The first three are reserved for the dynamic linker. |
| 8830 | |
| 8831 | For static executables, we don't reserve anything. */ |
| 8832 | |
| 8833 | if (plt == htab->root.splt) |
| 8834 | { |
| 8835 | plt_index = (h->plt.offset - htab->plt_header_size) / htab->plt_entry_size; |
| 8836 | got_offset = (plt_index + 3) * GOT_ENTRY_SIZE; |
| 8837 | } |
| 8838 | else |
| 8839 | { |
| 8840 | plt_index = h->plt.offset / htab->plt_entry_size; |
| 8841 | got_offset = plt_index * GOT_ENTRY_SIZE; |
| 8842 | } |
| 8843 | |
| 8844 | plt_entry = plt->contents + h->plt.offset; |
| 8845 | plt_entry_address = plt->output_section->vma |
| 8846 | + plt->output_offset + h->plt.offset; |
| 8847 | gotplt_entry_address = gotplt->output_section->vma + |
| 8848 | gotplt->output_offset + got_offset; |
| 8849 | |
| 8850 | /* Copy in the boiler-plate for the PLTn entry. */ |
| 8851 | memcpy (plt_entry, elfNN_aarch64_small_plt_entry, PLT_SMALL_ENTRY_SIZE); |
| 8852 | |
| 8853 | /* Fill in the top 21 bits for this: ADRP x16, PLT_GOT + n * 8. |
| 8854 | ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */ |
| 8855 | elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADR_HI21_PCREL, |
| 8856 | plt_entry, |
| 8857 | PG (gotplt_entry_address) - |
| 8858 | PG (plt_entry_address)); |
| 8859 | |
| 8860 | /* Fill in the lo12 bits for the load from the pltgot. */ |
| 8861 | elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_LDSTNN_LO12, |
| 8862 | plt_entry + 4, |
| 8863 | PG_OFFSET (gotplt_entry_address)); |
| 8864 | |
| 8865 | /* Fill in the lo12 bits for the add from the pltgot entry. */ |
| 8866 | elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADD_LO12, |
| 8867 | plt_entry + 8, |
| 8868 | PG_OFFSET (gotplt_entry_address)); |
| 8869 | |
| 8870 | /* All the GOTPLT Entries are essentially initialized to PLT0. */ |
| 8871 | bfd_put_NN (output_bfd, |
| 8872 | plt->output_section->vma + plt->output_offset, |
| 8873 | gotplt->contents + got_offset); |
| 8874 | |
| 8875 | rela.r_offset = gotplt_entry_address; |
| 8876 | |
| 8877 | if (h->dynindx == -1 |
| 8878 | || ((bfd_link_executable (info) |
| 8879 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) |
| 8880 | && h->def_regular |
| 8881 | && h->type == STT_GNU_IFUNC)) |
| 8882 | { |
| 8883 | /* If an STT_GNU_IFUNC symbol is locally defined, generate |
| 8884 | R_AARCH64_IRELATIVE instead of R_AARCH64_JUMP_SLOT. */ |
| 8885 | rela.r_info = ELFNN_R_INFO (0, AARCH64_R (IRELATIVE)); |
| 8886 | rela.r_addend = (h->root.u.def.value |
| 8887 | + h->root.u.def.section->output_section->vma |
| 8888 | + h->root.u.def.section->output_offset); |
| 8889 | } |
| 8890 | else |
| 8891 | { |
| 8892 | /* Fill in the entry in the .rela.plt section. */ |
| 8893 | rela.r_info = ELFNN_R_INFO (h->dynindx, AARCH64_R (JUMP_SLOT)); |
| 8894 | rela.r_addend = 0; |
| 8895 | } |
| 8896 | |
| 8897 | /* Compute the relocation entry to used based on PLT index and do |
| 8898 | not adjust reloc_count. The reloc_count has already been adjusted |
| 8899 | to account for this entry. */ |
| 8900 | loc = relplt->contents + plt_index * RELOC_SIZE (htab); |
| 8901 | bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc); |
| 8902 | } |
| 8903 | |
| 8904 | /* Size sections even though they're not dynamic. We use it to setup |
| 8905 | _TLS_MODULE_BASE_, if needed. */ |
| 8906 | |
| 8907 | static bfd_boolean |
| 8908 | elfNN_aarch64_always_size_sections (bfd *output_bfd, |
| 8909 | struct bfd_link_info *info) |
| 8910 | { |
| 8911 | asection *tls_sec; |
| 8912 | |
| 8913 | if (bfd_link_relocatable (info)) |
| 8914 | return TRUE; |
| 8915 | |
| 8916 | tls_sec = elf_hash_table (info)->tls_sec; |
| 8917 | |
| 8918 | if (tls_sec) |
| 8919 | { |
| 8920 | struct elf_link_hash_entry *tlsbase; |
| 8921 | |
| 8922 | tlsbase = elf_link_hash_lookup (elf_hash_table (info), |
| 8923 | "_TLS_MODULE_BASE_", TRUE, TRUE, FALSE); |
| 8924 | |
| 8925 | if (tlsbase) |
| 8926 | { |
| 8927 | struct bfd_link_hash_entry *h = NULL; |
| 8928 | const struct elf_backend_data *bed = |
| 8929 | get_elf_backend_data (output_bfd); |
| 8930 | |
| 8931 | if (!(_bfd_generic_link_add_one_symbol |
| 8932 | (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL, |
| 8933 | tls_sec, 0, NULL, FALSE, bed->collect, &h))) |
| 8934 | return FALSE; |
| 8935 | |
| 8936 | tlsbase->type = STT_TLS; |
| 8937 | tlsbase = (struct elf_link_hash_entry *) h; |
| 8938 | tlsbase->def_regular = 1; |
| 8939 | tlsbase->other = STV_HIDDEN; |
| 8940 | (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE); |
| 8941 | } |
| 8942 | } |
| 8943 | |
| 8944 | return TRUE; |
| 8945 | } |
| 8946 | |
| 8947 | /* Finish up dynamic symbol handling. We set the contents of various |
| 8948 | dynamic sections here. */ |
| 8949 | |
| 8950 | static bfd_boolean |
| 8951 | elfNN_aarch64_finish_dynamic_symbol (bfd *output_bfd, |
| 8952 | struct bfd_link_info *info, |
| 8953 | struct elf_link_hash_entry *h, |
| 8954 | Elf_Internal_Sym *sym) |
| 8955 | { |
| 8956 | struct elf_aarch64_link_hash_table *htab; |
| 8957 | htab = elf_aarch64_hash_table (info); |
| 8958 | |
| 8959 | if (h->plt.offset != (bfd_vma) - 1) |
| 8960 | { |
| 8961 | asection *plt, *gotplt, *relplt; |
| 8962 | |
| 8963 | /* This symbol has an entry in the procedure linkage table. Set |
| 8964 | it up. */ |
| 8965 | |
| 8966 | /* When building a static executable, use .iplt, .igot.plt and |
| 8967 | .rela.iplt sections for STT_GNU_IFUNC symbols. */ |
| 8968 | if (htab->root.splt != NULL) |
| 8969 | { |
| 8970 | plt = htab->root.splt; |
| 8971 | gotplt = htab->root.sgotplt; |
| 8972 | relplt = htab->root.srelplt; |
| 8973 | } |
| 8974 | else |
| 8975 | { |
| 8976 | plt = htab->root.iplt; |
| 8977 | gotplt = htab->root.igotplt; |
| 8978 | relplt = htab->root.irelplt; |
| 8979 | } |
| 8980 | |
| 8981 | /* This symbol has an entry in the procedure linkage table. Set |
| 8982 | it up. */ |
| 8983 | if ((h->dynindx == -1 |
| 8984 | && !((h->forced_local || bfd_link_executable (info)) |
| 8985 | && h->def_regular |
| 8986 | && h->type == STT_GNU_IFUNC)) |
| 8987 | || plt == NULL |
| 8988 | || gotplt == NULL |
| 8989 | || relplt == NULL) |
| 8990 | return FALSE; |
| 8991 | |
| 8992 | elfNN_aarch64_create_small_pltn_entry (h, htab, output_bfd, info); |
| 8993 | if (!h->def_regular) |
| 8994 | { |
| 8995 | /* Mark the symbol as undefined, rather than as defined in |
| 8996 | the .plt section. */ |
| 8997 | sym->st_shndx = SHN_UNDEF; |
| 8998 | /* If the symbol is weak we need to clear the value. |
| 8999 | Otherwise, the PLT entry would provide a definition for |
| 9000 | the symbol even if the symbol wasn't defined anywhere, |
| 9001 | and so the symbol would never be NULL. Leave the value if |
| 9002 | there were any relocations where pointer equality matters |
| 9003 | (this is a clue for the dynamic linker, to make function |
| 9004 | pointer comparisons work between an application and shared |
| 9005 | library). */ |
| 9006 | if (!h->ref_regular_nonweak || !h->pointer_equality_needed) |
| 9007 | sym->st_value = 0; |
| 9008 | } |
| 9009 | } |
| 9010 | |
| 9011 | if (h->got.offset != (bfd_vma) - 1 |
| 9012 | && elf_aarch64_hash_entry (h)->got_type == GOT_NORMAL |
| 9013 | /* Undefined weak symbol in static PIE resolves to 0 without |
| 9014 | any dynamic relocations. */ |
| 9015 | && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) |
| 9016 | { |
| 9017 | Elf_Internal_Rela rela; |
| 9018 | bfd_byte *loc; |
| 9019 | |
| 9020 | /* This symbol has an entry in the global offset table. Set it |
| 9021 | up. */ |
| 9022 | if (htab->root.sgot == NULL || htab->root.srelgot == NULL) |
| 9023 | abort (); |
| 9024 | |
| 9025 | rela.r_offset = (htab->root.sgot->output_section->vma |
| 9026 | + htab->root.sgot->output_offset |
| 9027 | + (h->got.offset & ~(bfd_vma) 1)); |
| 9028 | |
| 9029 | if (h->def_regular |
| 9030 | && h->type == STT_GNU_IFUNC) |
| 9031 | { |
| 9032 | if (bfd_link_pic (info)) |
| 9033 | { |
| 9034 | /* Generate R_AARCH64_GLOB_DAT. */ |
| 9035 | goto do_glob_dat; |
| 9036 | } |
| 9037 | else |
| 9038 | { |
| 9039 | asection *plt; |
| 9040 | |
| 9041 | if (!h->pointer_equality_needed) |
| 9042 | abort (); |
| 9043 | |
| 9044 | /* For non-shared object, we can't use .got.plt, which |
| 9045 | contains the real function address if we need pointer |
| 9046 | equality. We load the GOT entry with the PLT entry. */ |
| 9047 | plt = htab->root.splt ? htab->root.splt : htab->root.iplt; |
| 9048 | bfd_put_NN (output_bfd, (plt->output_section->vma |
| 9049 | + plt->output_offset |
| 9050 | + h->plt.offset), |
| 9051 | htab->root.sgot->contents |
| 9052 | + (h->got.offset & ~(bfd_vma) 1)); |
| 9053 | return TRUE; |
| 9054 | } |
| 9055 | } |
| 9056 | else if (bfd_link_pic (info) && SYMBOL_REFERENCES_LOCAL (info, h)) |
| 9057 | { |
| 9058 | if (!(h->def_regular || ELF_COMMON_DEF_P (h))) |
| 9059 | return FALSE; |
| 9060 | |
| 9061 | BFD_ASSERT ((h->got.offset & 1) != 0); |
| 9062 | rela.r_info = ELFNN_R_INFO (0, AARCH64_R (RELATIVE)); |
| 9063 | rela.r_addend = (h->root.u.def.value |
| 9064 | + h->root.u.def.section->output_section->vma |
| 9065 | + h->root.u.def.section->output_offset); |
| 9066 | } |
| 9067 | else |
| 9068 | { |
| 9069 | do_glob_dat: |
| 9070 | BFD_ASSERT ((h->got.offset & 1) == 0); |
| 9071 | bfd_put_NN (output_bfd, (bfd_vma) 0, |
| 9072 | htab->root.sgot->contents + h->got.offset); |
| 9073 | rela.r_info = ELFNN_R_INFO (h->dynindx, AARCH64_R (GLOB_DAT)); |
| 9074 | rela.r_addend = 0; |
| 9075 | } |
| 9076 | |
| 9077 | loc = htab->root.srelgot->contents; |
| 9078 | loc += htab->root.srelgot->reloc_count++ * RELOC_SIZE (htab); |
| 9079 | bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc); |
| 9080 | } |
| 9081 | |
| 9082 | if (h->needs_copy) |
| 9083 | { |
| 9084 | Elf_Internal_Rela rela; |
| 9085 | asection *s; |
| 9086 | bfd_byte *loc; |
| 9087 | |
| 9088 | /* This symbol needs a copy reloc. Set it up. */ |
| 9089 | if (h->dynindx == -1 |
| 9090 | || (h->root.type != bfd_link_hash_defined |
| 9091 | && h->root.type != bfd_link_hash_defweak) |
| 9092 | || htab->root.srelbss == NULL) |
| 9093 | abort (); |
| 9094 | |
| 9095 | rela.r_offset = (h->root.u.def.value |
| 9096 | + h->root.u.def.section->output_section->vma |
| 9097 | + h->root.u.def.section->output_offset); |
| 9098 | rela.r_info = ELFNN_R_INFO (h->dynindx, AARCH64_R (COPY)); |
| 9099 | rela.r_addend = 0; |
| 9100 | if (h->root.u.def.section == htab->root.sdynrelro) |
| 9101 | s = htab->root.sreldynrelro; |
| 9102 | else |
| 9103 | s = htab->root.srelbss; |
| 9104 | loc = s->contents + s->reloc_count++ * RELOC_SIZE (htab); |
| 9105 | bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc); |
| 9106 | } |
| 9107 | |
| 9108 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. SYM may |
| 9109 | be NULL for local symbols. */ |
| 9110 | if (sym != NULL |
| 9111 | && (h == elf_hash_table (info)->hdynamic |
| 9112 | || h == elf_hash_table (info)->hgot)) |
| 9113 | sym->st_shndx = SHN_ABS; |
| 9114 | |
| 9115 | return TRUE; |
| 9116 | } |
| 9117 | |
| 9118 | /* Finish up local dynamic symbol handling. We set the contents of |
| 9119 | various dynamic sections here. */ |
| 9120 | |
| 9121 | static bfd_boolean |
| 9122 | elfNN_aarch64_finish_local_dynamic_symbol (void **slot, void *inf) |
| 9123 | { |
| 9124 | struct elf_link_hash_entry *h |
| 9125 | = (struct elf_link_hash_entry *) *slot; |
| 9126 | struct bfd_link_info *info |
| 9127 | = (struct bfd_link_info *) inf; |
| 9128 | |
| 9129 | return elfNN_aarch64_finish_dynamic_symbol (info->output_bfd, |
| 9130 | info, h, NULL); |
| 9131 | } |
| 9132 | |
| 9133 | static void |
| 9134 | elfNN_aarch64_init_small_plt0_entry (bfd *output_bfd ATTRIBUTE_UNUSED, |
| 9135 | struct elf_aarch64_link_hash_table |
| 9136 | *htab) |
| 9137 | { |
| 9138 | /* Fill in PLT0. Fixme:RR Note this doesn't distinguish between |
| 9139 | small and large plts and at the minute just generates |
| 9140 | the small PLT. */ |
| 9141 | |
| 9142 | /* PLT0 of the small PLT looks like this in ELF64 - |
| 9143 | stp x16, x30, [sp, #-16]! // Save the reloc and lr on stack. |
| 9144 | adrp x16, PLT_GOT + 16 // Get the page base of the GOTPLT |
| 9145 | ldr x17, [x16, #:lo12:PLT_GOT+16] // Load the address of the |
| 9146 | // symbol resolver |
| 9147 | add x16, x16, #:lo12:PLT_GOT+16 // Load the lo12 bits of the |
| 9148 | // GOTPLT entry for this. |
| 9149 | br x17 |
| 9150 | PLT0 will be slightly different in ELF32 due to different got entry |
| 9151 | size. */ |
| 9152 | bfd_vma plt_got_2nd_ent; /* Address of GOT[2]. */ |
| 9153 | bfd_vma plt_base; |
| 9154 | |
| 9155 | |
| 9156 | memcpy (htab->root.splt->contents, elfNN_aarch64_small_plt0_entry, |
| 9157 | PLT_ENTRY_SIZE); |
| 9158 | elf_section_data (htab->root.splt->output_section)->this_hdr.sh_entsize = |
| 9159 | PLT_ENTRY_SIZE; |
| 9160 | |
| 9161 | plt_got_2nd_ent = (htab->root.sgotplt->output_section->vma |
| 9162 | + htab->root.sgotplt->output_offset |
| 9163 | + GOT_ENTRY_SIZE * 2); |
| 9164 | |
| 9165 | plt_base = htab->root.splt->output_section->vma + |
| 9166 | htab->root.splt->output_offset; |
| 9167 | |
| 9168 | /* Fill in the top 21 bits for this: ADRP x16, PLT_GOT + n * 8. |
| 9169 | ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */ |
| 9170 | elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADR_HI21_PCREL, |
| 9171 | htab->root.splt->contents + 4, |
| 9172 | PG (plt_got_2nd_ent) - PG (plt_base + 4)); |
| 9173 | |
| 9174 | elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_LDSTNN_LO12, |
| 9175 | htab->root.splt->contents + 8, |
| 9176 | PG_OFFSET (plt_got_2nd_ent)); |
| 9177 | |
| 9178 | elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADD_LO12, |
| 9179 | htab->root.splt->contents + 12, |
| 9180 | PG_OFFSET (plt_got_2nd_ent)); |
| 9181 | } |
| 9182 | |
| 9183 | static bfd_boolean |
| 9184 | elfNN_aarch64_finish_dynamic_sections (bfd *output_bfd, |
| 9185 | struct bfd_link_info *info) |
| 9186 | { |
| 9187 | struct elf_aarch64_link_hash_table *htab; |
| 9188 | bfd *dynobj; |
| 9189 | asection *sdyn; |
| 9190 | |
| 9191 | htab = elf_aarch64_hash_table (info); |
| 9192 | dynobj = htab->root.dynobj; |
| 9193 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
| 9194 | |
| 9195 | if (htab->root.dynamic_sections_created) |
| 9196 | { |
| 9197 | ElfNN_External_Dyn *dyncon, *dynconend; |
| 9198 | |
| 9199 | if (sdyn == NULL || htab->root.sgot == NULL) |
| 9200 | abort (); |
| 9201 | |
| 9202 | dyncon = (ElfNN_External_Dyn *) sdyn->contents; |
| 9203 | dynconend = (ElfNN_External_Dyn *) (sdyn->contents + sdyn->size); |
| 9204 | for (; dyncon < dynconend; dyncon++) |
| 9205 | { |
| 9206 | Elf_Internal_Dyn dyn; |
| 9207 | asection *s; |
| 9208 | |
| 9209 | bfd_elfNN_swap_dyn_in (dynobj, dyncon, &dyn); |
| 9210 | |
| 9211 | switch (dyn.d_tag) |
| 9212 | { |
| 9213 | default: |
| 9214 | continue; |
| 9215 | |
| 9216 | case DT_PLTGOT: |
| 9217 | s = htab->root.sgotplt; |
| 9218 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
| 9219 | break; |
| 9220 | |
| 9221 | case DT_JMPREL: |
| 9222 | s = htab->root.srelplt; |
| 9223 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
| 9224 | break; |
| 9225 | |
| 9226 | case DT_PLTRELSZ: |
| 9227 | s = htab->root.srelplt; |
| 9228 | dyn.d_un.d_val = s->size; |
| 9229 | break; |
| 9230 | |
| 9231 | case DT_TLSDESC_PLT: |
| 9232 | s = htab->root.splt; |
| 9233 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
| 9234 | + htab->tlsdesc_plt; |
| 9235 | break; |
| 9236 | |
| 9237 | case DT_TLSDESC_GOT: |
| 9238 | s = htab->root.sgot; |
| 9239 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
| 9240 | + htab->dt_tlsdesc_got; |
| 9241 | break; |
| 9242 | } |
| 9243 | |
| 9244 | bfd_elfNN_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 9245 | } |
| 9246 | |
| 9247 | } |
| 9248 | |
| 9249 | /* Fill in the special first entry in the procedure linkage table. */ |
| 9250 | if (htab->root.splt && htab->root.splt->size > 0) |
| 9251 | { |
| 9252 | elfNN_aarch64_init_small_plt0_entry (output_bfd, htab); |
| 9253 | |
| 9254 | elf_section_data (htab->root.splt->output_section)-> |
| 9255 | this_hdr.sh_entsize = htab->plt_entry_size; |
| 9256 | |
| 9257 | |
| 9258 | if (htab->tlsdesc_plt) |
| 9259 | { |
| 9260 | bfd_put_NN (output_bfd, (bfd_vma) 0, |
| 9261 | htab->root.sgot->contents + htab->dt_tlsdesc_got); |
| 9262 | |
| 9263 | memcpy (htab->root.splt->contents + htab->tlsdesc_plt, |
| 9264 | elfNN_aarch64_tlsdesc_small_plt_entry, |
| 9265 | sizeof (elfNN_aarch64_tlsdesc_small_plt_entry)); |
| 9266 | |
| 9267 | { |
| 9268 | bfd_vma adrp1_addr = |
| 9269 | htab->root.splt->output_section->vma |
| 9270 | + htab->root.splt->output_offset + htab->tlsdesc_plt + 4; |
| 9271 | |
| 9272 | bfd_vma adrp2_addr = adrp1_addr + 4; |
| 9273 | |
| 9274 | bfd_vma got_addr = |
| 9275 | htab->root.sgot->output_section->vma |
| 9276 | + htab->root.sgot->output_offset; |
| 9277 | |
| 9278 | bfd_vma pltgot_addr = |
| 9279 | htab->root.sgotplt->output_section->vma |
| 9280 | + htab->root.sgotplt->output_offset; |
| 9281 | |
| 9282 | bfd_vma dt_tlsdesc_got = got_addr + htab->dt_tlsdesc_got; |
| 9283 | |
| 9284 | bfd_byte *plt_entry = |
| 9285 | htab->root.splt->contents + htab->tlsdesc_plt; |
| 9286 | |
| 9287 | /* adrp x2, DT_TLSDESC_GOT */ |
| 9288 | elf_aarch64_update_plt_entry (output_bfd, |
| 9289 | BFD_RELOC_AARCH64_ADR_HI21_PCREL, |
| 9290 | plt_entry + 4, |
| 9291 | (PG (dt_tlsdesc_got) |
| 9292 | - PG (adrp1_addr))); |
| 9293 | |
| 9294 | /* adrp x3, 0 */ |
| 9295 | elf_aarch64_update_plt_entry (output_bfd, |
| 9296 | BFD_RELOC_AARCH64_ADR_HI21_PCREL, |
| 9297 | plt_entry + 8, |
| 9298 | (PG (pltgot_addr) |
| 9299 | - PG (adrp2_addr))); |
| 9300 | |
| 9301 | /* ldr x2, [x2, #0] */ |
| 9302 | elf_aarch64_update_plt_entry (output_bfd, |
| 9303 | BFD_RELOC_AARCH64_LDSTNN_LO12, |
| 9304 | plt_entry + 12, |
| 9305 | PG_OFFSET (dt_tlsdesc_got)); |
| 9306 | |
| 9307 | /* add x3, x3, 0 */ |
| 9308 | elf_aarch64_update_plt_entry (output_bfd, |
| 9309 | BFD_RELOC_AARCH64_ADD_LO12, |
| 9310 | plt_entry + 16, |
| 9311 | PG_OFFSET (pltgot_addr)); |
| 9312 | } |
| 9313 | } |
| 9314 | } |
| 9315 | |
| 9316 | if (htab->root.sgotplt) |
| 9317 | { |
| 9318 | if (bfd_is_abs_section (htab->root.sgotplt->output_section)) |
| 9319 | { |
| 9320 | _bfd_error_handler |
| 9321 | (_("discarded output section: `%pA'"), htab->root.sgotplt); |
| 9322 | return FALSE; |
| 9323 | } |
| 9324 | |
| 9325 | /* Fill in the first three entries in the global offset table. */ |
| 9326 | if (htab->root.sgotplt->size > 0) |
| 9327 | { |
| 9328 | bfd_put_NN (output_bfd, (bfd_vma) 0, htab->root.sgotplt->contents); |
| 9329 | |
| 9330 | /* Write GOT[1] and GOT[2], needed for the dynamic linker. */ |
| 9331 | bfd_put_NN (output_bfd, |
| 9332 | (bfd_vma) 0, |
| 9333 | htab->root.sgotplt->contents + GOT_ENTRY_SIZE); |
| 9334 | bfd_put_NN (output_bfd, |
| 9335 | (bfd_vma) 0, |
| 9336 | htab->root.sgotplt->contents + GOT_ENTRY_SIZE * 2); |
| 9337 | } |
| 9338 | |
| 9339 | if (htab->root.sgot) |
| 9340 | { |
| 9341 | if (htab->root.sgot->size > 0) |
| 9342 | { |
| 9343 | bfd_vma addr = |
| 9344 | sdyn ? sdyn->output_section->vma + sdyn->output_offset : 0; |
| 9345 | bfd_put_NN (output_bfd, addr, htab->root.sgot->contents); |
| 9346 | } |
| 9347 | } |
| 9348 | |
| 9349 | elf_section_data (htab->root.sgotplt->output_section)-> |
| 9350 | this_hdr.sh_entsize = GOT_ENTRY_SIZE; |
| 9351 | } |
| 9352 | |
| 9353 | if (htab->root.sgot && htab->root.sgot->size > 0) |
| 9354 | elf_section_data (htab->root.sgot->output_section)->this_hdr.sh_entsize |
| 9355 | = GOT_ENTRY_SIZE; |
| 9356 | |
| 9357 | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ |
| 9358 | htab_traverse (htab->loc_hash_table, |
| 9359 | elfNN_aarch64_finish_local_dynamic_symbol, |
| 9360 | info); |
| 9361 | |
| 9362 | return TRUE; |
| 9363 | } |
| 9364 | |
| 9365 | /* Return address for Ith PLT stub in section PLT, for relocation REL |
| 9366 | or (bfd_vma) -1 if it should not be included. */ |
| 9367 | |
| 9368 | static bfd_vma |
| 9369 | elfNN_aarch64_plt_sym_val (bfd_vma i, const asection *plt, |
| 9370 | const arelent *rel ATTRIBUTE_UNUSED) |
| 9371 | { |
| 9372 | return plt->vma + PLT_ENTRY_SIZE + i * PLT_SMALL_ENTRY_SIZE; |
| 9373 | } |
| 9374 | |
| 9375 | /* Returns TRUE if NAME is an AArch64 mapping symbol. |
| 9376 | The ARM ELF standard defines $x (for A64 code) and $d (for data). |
| 9377 | It also allows a period initiated suffix to be added to the symbol, ie: |
| 9378 | "$[adtx]\.[:sym_char]+". */ |
| 9379 | |
| 9380 | static bfd_boolean |
| 9381 | is_aarch64_mapping_symbol (const char * name) |
| 9382 | { |
| 9383 | return name != NULL /* Paranoia. */ |
| 9384 | && name[0] == '$' /* Note: if objcopy --prefix-symbols has been used then |
| 9385 | the mapping symbols could have acquired a prefix. |
| 9386 | We do not support this here, since such symbols no |
| 9387 | longer conform to the ARM ELF ABI. */ |
| 9388 | && (name[1] == 'd' || name[1] == 'x') |
| 9389 | && (name[2] == 0 || name[2] == '.'); |
| 9390 | /* FIXME: Strictly speaking the symbol is only a valid mapping symbol if |
| 9391 | any characters that follow the period are legal characters for the body |
| 9392 | of a symbol's name. For now we just assume that this is the case. */ |
| 9393 | } |
| 9394 | |
| 9395 | /* Make sure that mapping symbols in object files are not removed via the |
| 9396 | "strip --strip-unneeded" tool. These symbols might needed in order to |
| 9397 | correctly generate linked files. Once an object file has been linked, |
| 9398 | it should be safe to remove them. */ |
| 9399 | |
| 9400 | static void |
| 9401 | elfNN_aarch64_backend_symbol_processing (bfd *abfd, asymbol *sym) |
| 9402 | { |
| 9403 | if (((abfd->flags & (EXEC_P | DYNAMIC)) == 0) |
| 9404 | && sym->section != bfd_abs_section_ptr |
| 9405 | && is_aarch64_mapping_symbol (sym->name)) |
| 9406 | sym->flags |= BSF_KEEP; |
| 9407 | } |
| 9408 | |
| 9409 | |
| 9410 | /* We use this so we can override certain functions |
| 9411 | (though currently we don't). */ |
| 9412 | |
| 9413 | const struct elf_size_info elfNN_aarch64_size_info = |
| 9414 | { |
| 9415 | sizeof (ElfNN_External_Ehdr), |
| 9416 | sizeof (ElfNN_External_Phdr), |
| 9417 | sizeof (ElfNN_External_Shdr), |
| 9418 | sizeof (ElfNN_External_Rel), |
| 9419 | sizeof (ElfNN_External_Rela), |
| 9420 | sizeof (ElfNN_External_Sym), |
| 9421 | sizeof (ElfNN_External_Dyn), |
| 9422 | sizeof (Elf_External_Note), |
| 9423 | 4, /* Hash table entry size. */ |
| 9424 | 1, /* Internal relocs per external relocs. */ |
| 9425 | ARCH_SIZE, /* Arch size. */ |
| 9426 | LOG_FILE_ALIGN, /* Log_file_align. */ |
| 9427 | ELFCLASSNN, EV_CURRENT, |
| 9428 | bfd_elfNN_write_out_phdrs, |
| 9429 | bfd_elfNN_write_shdrs_and_ehdr, |
| 9430 | bfd_elfNN_checksum_contents, |
| 9431 | bfd_elfNN_write_relocs, |
| 9432 | bfd_elfNN_swap_symbol_in, |
| 9433 | bfd_elfNN_swap_symbol_out, |
| 9434 | bfd_elfNN_slurp_reloc_table, |
| 9435 | bfd_elfNN_slurp_symbol_table, |
| 9436 | bfd_elfNN_swap_dyn_in, |
| 9437 | bfd_elfNN_swap_dyn_out, |
| 9438 | bfd_elfNN_swap_reloc_in, |
| 9439 | bfd_elfNN_swap_reloc_out, |
| 9440 | bfd_elfNN_swap_reloca_in, |
| 9441 | bfd_elfNN_swap_reloca_out |
| 9442 | }; |
| 9443 | |
| 9444 | #define ELF_ARCH bfd_arch_aarch64 |
| 9445 | #define ELF_MACHINE_CODE EM_AARCH64 |
| 9446 | #define ELF_MAXPAGESIZE 0x10000 |
| 9447 | #define ELF_MINPAGESIZE 0x1000 |
| 9448 | #define ELF_COMMONPAGESIZE 0x1000 |
| 9449 | |
| 9450 | #define bfd_elfNN_close_and_cleanup \ |
| 9451 | elfNN_aarch64_close_and_cleanup |
| 9452 | |
| 9453 | #define bfd_elfNN_bfd_free_cached_info \ |
| 9454 | elfNN_aarch64_bfd_free_cached_info |
| 9455 | |
| 9456 | #define bfd_elfNN_bfd_is_target_special_symbol \ |
| 9457 | elfNN_aarch64_is_target_special_symbol |
| 9458 | |
| 9459 | #define bfd_elfNN_bfd_link_hash_table_create \ |
| 9460 | elfNN_aarch64_link_hash_table_create |
| 9461 | |
| 9462 | #define bfd_elfNN_bfd_merge_private_bfd_data \ |
| 9463 | elfNN_aarch64_merge_private_bfd_data |
| 9464 | |
| 9465 | #define bfd_elfNN_bfd_print_private_bfd_data \ |
| 9466 | elfNN_aarch64_print_private_bfd_data |
| 9467 | |
| 9468 | #define bfd_elfNN_bfd_reloc_type_lookup \ |
| 9469 | elfNN_aarch64_reloc_type_lookup |
| 9470 | |
| 9471 | #define bfd_elfNN_bfd_reloc_name_lookup \ |
| 9472 | elfNN_aarch64_reloc_name_lookup |
| 9473 | |
| 9474 | #define bfd_elfNN_bfd_set_private_flags \ |
| 9475 | elfNN_aarch64_set_private_flags |
| 9476 | |
| 9477 | #define bfd_elfNN_find_inliner_info \ |
| 9478 | elfNN_aarch64_find_inliner_info |
| 9479 | |
| 9480 | #define bfd_elfNN_find_nearest_line \ |
| 9481 | elfNN_aarch64_find_nearest_line |
| 9482 | |
| 9483 | #define bfd_elfNN_mkobject \ |
| 9484 | elfNN_aarch64_mkobject |
| 9485 | |
| 9486 | #define bfd_elfNN_new_section_hook \ |
| 9487 | elfNN_aarch64_new_section_hook |
| 9488 | |
| 9489 | #define elf_backend_adjust_dynamic_symbol \ |
| 9490 | elfNN_aarch64_adjust_dynamic_symbol |
| 9491 | |
| 9492 | #define elf_backend_always_size_sections \ |
| 9493 | elfNN_aarch64_always_size_sections |
| 9494 | |
| 9495 | #define elf_backend_check_relocs \ |
| 9496 | elfNN_aarch64_check_relocs |
| 9497 | |
| 9498 | #define elf_backend_copy_indirect_symbol \ |
| 9499 | elfNN_aarch64_copy_indirect_symbol |
| 9500 | |
| 9501 | /* Create .dynbss, and .rela.bss sections in DYNOBJ, and set up shortcuts |
| 9502 | to them in our hash. */ |
| 9503 | #define elf_backend_create_dynamic_sections \ |
| 9504 | elfNN_aarch64_create_dynamic_sections |
| 9505 | |
| 9506 | #define elf_backend_init_index_section \ |
| 9507 | _bfd_elf_init_2_index_sections |
| 9508 | |
| 9509 | #define elf_backend_finish_dynamic_sections \ |
| 9510 | elfNN_aarch64_finish_dynamic_sections |
| 9511 | |
| 9512 | #define elf_backend_finish_dynamic_symbol \ |
| 9513 | elfNN_aarch64_finish_dynamic_symbol |
| 9514 | |
| 9515 | #define elf_backend_object_p \ |
| 9516 | elfNN_aarch64_object_p |
| 9517 | |
| 9518 | #define elf_backend_output_arch_local_syms \ |
| 9519 | elfNN_aarch64_output_arch_local_syms |
| 9520 | |
| 9521 | #define elf_backend_plt_sym_val \ |
| 9522 | elfNN_aarch64_plt_sym_val |
| 9523 | |
| 9524 | #define elf_backend_post_process_headers \ |
| 9525 | elfNN_aarch64_post_process_headers |
| 9526 | |
| 9527 | #define elf_backend_relocate_section \ |
| 9528 | elfNN_aarch64_relocate_section |
| 9529 | |
| 9530 | #define elf_backend_reloc_type_class \ |
| 9531 | elfNN_aarch64_reloc_type_class |
| 9532 | |
| 9533 | #define elf_backend_section_from_shdr \ |
| 9534 | elfNN_aarch64_section_from_shdr |
| 9535 | |
| 9536 | #define elf_backend_size_dynamic_sections \ |
| 9537 | elfNN_aarch64_size_dynamic_sections |
| 9538 | |
| 9539 | #define elf_backend_size_info \ |
| 9540 | elfNN_aarch64_size_info |
| 9541 | |
| 9542 | #define elf_backend_write_section \ |
| 9543 | elfNN_aarch64_write_section |
| 9544 | |
| 9545 | #define elf_backend_symbol_processing \ |
| 9546 | elfNN_aarch64_backend_symbol_processing |
| 9547 | |
| 9548 | #define elf_backend_can_refcount 1 |
| 9549 | #define elf_backend_can_gc_sections 1 |
| 9550 | #define elf_backend_plt_readonly 1 |
| 9551 | #define elf_backend_want_got_plt 1 |
| 9552 | #define elf_backend_want_plt_sym 0 |
| 9553 | #define elf_backend_want_dynrelro 1 |
| 9554 | #define elf_backend_may_use_rel_p 0 |
| 9555 | #define elf_backend_may_use_rela_p 1 |
| 9556 | #define elf_backend_default_use_rela_p 1 |
| 9557 | #define elf_backend_rela_normal 1 |
| 9558 | #define elf_backend_dtrel_excludes_plt 1 |
| 9559 | #define elf_backend_got_header_size (GOT_ENTRY_SIZE * 3) |
| 9560 | #define elf_backend_default_execstack 0 |
| 9561 | #define elf_backend_extern_protected_data 1 |
| 9562 | #define elf_backend_hash_symbol elf_aarch64_hash_symbol |
| 9563 | |
| 9564 | #undef elf_backend_obj_attrs_section |
| 9565 | #define elf_backend_obj_attrs_section ".ARM.attributes" |
| 9566 | |
| 9567 | #include "elfNN-target.h" |
| 9568 | |
| 9569 | /* CloudABI support. */ |
| 9570 | |
| 9571 | #undef TARGET_LITTLE_SYM |
| 9572 | #define TARGET_LITTLE_SYM aarch64_elfNN_le_cloudabi_vec |
| 9573 | #undef TARGET_LITTLE_NAME |
| 9574 | #define TARGET_LITTLE_NAME "elfNN-littleaarch64-cloudabi" |
| 9575 | #undef TARGET_BIG_SYM |
| 9576 | #define TARGET_BIG_SYM aarch64_elfNN_be_cloudabi_vec |
| 9577 | #undef TARGET_BIG_NAME |
| 9578 | #define TARGET_BIG_NAME "elfNN-bigaarch64-cloudabi" |
| 9579 | |
| 9580 | #undef ELF_OSABI |
| 9581 | #define ELF_OSABI ELFOSABI_CLOUDABI |
| 9582 | |
| 9583 | #undef elfNN_bed |
| 9584 | #define elfNN_bed elfNN_aarch64_cloudabi_bed |
| 9585 | |
| 9586 | #include "elfNN-target.h" |