| 1 | /* AArch64-specific support for NN-bit ELF. |
| 2 | Copyright (C) 2009-2015 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 | #endif |
| 158 | |
| 159 | #if ARCH_SIZE == 32 |
| 160 | #define AARCH64_R(NAME) R_AARCH64_P32_ ## NAME |
| 161 | #define AARCH64_R_STR(NAME) "R_AARCH64_P32_" #NAME |
| 162 | #define HOWTO64(...) EMPTY_HOWTO (0) |
| 163 | #define HOWTO32(...) HOWTO (__VA_ARGS__) |
| 164 | #define LOG_FILE_ALIGN 2 |
| 165 | #endif |
| 166 | |
| 167 | #define IS_AARCH64_TLS_RELOC(R_TYPE) \ |
| 168 | ((R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21 \ |
| 169 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC \ |
| 170 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1 \ |
| 171 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC \ |
| 172 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21 \ |
| 173 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC \ |
| 174 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC \ |
| 175 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19 \ |
| 176 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12 \ |
| 177 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12 \ |
| 178 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC \ |
| 179 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2 \ |
| 180 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1 \ |
| 181 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC \ |
| 182 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0 \ |
| 183 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC \ |
| 184 | || (R_TYPE) == BFD_RELOC_AARCH64_TLS_DTPMOD \ |
| 185 | || (R_TYPE) == BFD_RELOC_AARCH64_TLS_DTPREL \ |
| 186 | || (R_TYPE) == BFD_RELOC_AARCH64_TLS_TPREL \ |
| 187 | || IS_AARCH64_TLSDESC_RELOC ((R_TYPE))) |
| 188 | |
| 189 | #define IS_AARCH64_TLSDESC_RELOC(R_TYPE) \ |
| 190 | ((R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD_PREL19 \ |
| 191 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21 \ |
| 192 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21 \ |
| 193 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC \ |
| 194 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC \ |
| 195 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC \ |
| 196 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_OFF_G1 \ |
| 197 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC \ |
| 198 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LDR \ |
| 199 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD \ |
| 200 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_CALL \ |
| 201 | || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC) |
| 202 | |
| 203 | #define ELIMINATE_COPY_RELOCS 0 |
| 204 | |
| 205 | /* Return size of a relocation entry. HTAB is the bfd's |
| 206 | elf_aarch64_link_hash_entry. */ |
| 207 | #define RELOC_SIZE(HTAB) (sizeof (ElfNN_External_Rela)) |
| 208 | |
| 209 | /* GOT Entry size - 8 bytes in ELF64 and 4 bytes in ELF32. */ |
| 210 | #define GOT_ENTRY_SIZE (ARCH_SIZE / 8) |
| 211 | #define PLT_ENTRY_SIZE (32) |
| 212 | #define PLT_SMALL_ENTRY_SIZE (16) |
| 213 | #define PLT_TLSDESC_ENTRY_SIZE (32) |
| 214 | |
| 215 | /* Encoding of the nop instruction */ |
| 216 | #define INSN_NOP 0xd503201f |
| 217 | |
| 218 | #define aarch64_compute_jump_table_size(htab) \ |
| 219 | (((htab)->root.srelplt == NULL) ? 0 \ |
| 220 | : (htab)->root.srelplt->reloc_count * GOT_ENTRY_SIZE) |
| 221 | |
| 222 | /* The first entry in a procedure linkage table looks like this |
| 223 | if the distance between the PLTGOT and the PLT is < 4GB use |
| 224 | these PLT entries. Note that the dynamic linker gets &PLTGOT[2] |
| 225 | in x16 and needs to work out PLTGOT[1] by using an address of |
| 226 | [x16,#-GOT_ENTRY_SIZE]. */ |
| 227 | static const bfd_byte elfNN_aarch64_small_plt0_entry[PLT_ENTRY_SIZE] = |
| 228 | { |
| 229 | 0xf0, 0x7b, 0xbf, 0xa9, /* stp x16, x30, [sp, #-16]! */ |
| 230 | 0x10, 0x00, 0x00, 0x90, /* adrp x16, (GOT+16) */ |
| 231 | #if ARCH_SIZE == 64 |
| 232 | 0x11, 0x0A, 0x40, 0xf9, /* ldr x17, [x16, #PLT_GOT+0x10] */ |
| 233 | 0x10, 0x42, 0x00, 0x91, /* add x16, x16,#PLT_GOT+0x10 */ |
| 234 | #else |
| 235 | 0x11, 0x0A, 0x40, 0xb9, /* ldr w17, [x16, #PLT_GOT+0x8] */ |
| 236 | 0x10, 0x22, 0x00, 0x11, /* add w16, w16,#PLT_GOT+0x8 */ |
| 237 | #endif |
| 238 | 0x20, 0x02, 0x1f, 0xd6, /* br x17 */ |
| 239 | 0x1f, 0x20, 0x03, 0xd5, /* nop */ |
| 240 | 0x1f, 0x20, 0x03, 0xd5, /* nop */ |
| 241 | 0x1f, 0x20, 0x03, 0xd5, /* nop */ |
| 242 | }; |
| 243 | |
| 244 | /* Per function entry in a procedure linkage table looks like this |
| 245 | if the distance between the PLTGOT and the PLT is < 4GB use |
| 246 | these PLT entries. */ |
| 247 | static const bfd_byte elfNN_aarch64_small_plt_entry[PLT_SMALL_ENTRY_SIZE] = |
| 248 | { |
| 249 | 0x10, 0x00, 0x00, 0x90, /* adrp x16, PLTGOT + n * 8 */ |
| 250 | #if ARCH_SIZE == 64 |
| 251 | 0x11, 0x02, 0x40, 0xf9, /* ldr x17, [x16, PLTGOT + n * 8] */ |
| 252 | 0x10, 0x02, 0x00, 0x91, /* add x16, x16, :lo12:PLTGOT + n * 8 */ |
| 253 | #else |
| 254 | 0x11, 0x02, 0x40, 0xb9, /* ldr w17, [x16, PLTGOT + n * 4] */ |
| 255 | 0x10, 0x02, 0x00, 0x11, /* add w16, w16, :lo12:PLTGOT + n * 4 */ |
| 256 | #endif |
| 257 | 0x20, 0x02, 0x1f, 0xd6, /* br x17. */ |
| 258 | }; |
| 259 | |
| 260 | static const bfd_byte |
| 261 | elfNN_aarch64_tlsdesc_small_plt_entry[PLT_TLSDESC_ENTRY_SIZE] = |
| 262 | { |
| 263 | 0xe2, 0x0f, 0xbf, 0xa9, /* stp x2, x3, [sp, #-16]! */ |
| 264 | 0x02, 0x00, 0x00, 0x90, /* adrp x2, 0 */ |
| 265 | 0x03, 0x00, 0x00, 0x90, /* adrp x3, 0 */ |
| 266 | #if ARCH_SIZE == 64 |
| 267 | 0x42, 0x00, 0x40, 0xf9, /* ldr x2, [x2, #0] */ |
| 268 | 0x63, 0x00, 0x00, 0x91, /* add x3, x3, 0 */ |
| 269 | #else |
| 270 | 0x42, 0x00, 0x40, 0xb9, /* ldr w2, [x2, #0] */ |
| 271 | 0x63, 0x00, 0x00, 0x11, /* add w3, w3, 0 */ |
| 272 | #endif |
| 273 | 0x40, 0x00, 0x1f, 0xd6, /* br x2 */ |
| 274 | 0x1f, 0x20, 0x03, 0xd5, /* nop */ |
| 275 | 0x1f, 0x20, 0x03, 0xd5, /* nop */ |
| 276 | }; |
| 277 | |
| 278 | #define elf_info_to_howto elfNN_aarch64_info_to_howto |
| 279 | #define elf_info_to_howto_rel elfNN_aarch64_info_to_howto |
| 280 | |
| 281 | #define AARCH64_ELF_ABI_VERSION 0 |
| 282 | |
| 283 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */ |
| 284 | #define ALL_ONES (~ (bfd_vma) 0) |
| 285 | |
| 286 | /* Indexed by the bfd interal reloc enumerators. |
| 287 | Therefore, the table needs to be synced with BFD_RELOC_AARCH64_* |
| 288 | in reloc.c. */ |
| 289 | |
| 290 | static reloc_howto_type elfNN_aarch64_howto_table[] = |
| 291 | { |
| 292 | EMPTY_HOWTO (0), |
| 293 | |
| 294 | /* Basic data relocations. */ |
| 295 | |
| 296 | #if ARCH_SIZE == 64 |
| 297 | HOWTO (R_AARCH64_NULL, /* type */ |
| 298 | 0, /* rightshift */ |
| 299 | 3, /* size (0 = byte, 1 = short, 2 = long) */ |
| 300 | 0, /* bitsize */ |
| 301 | FALSE, /* pc_relative */ |
| 302 | 0, /* bitpos */ |
| 303 | complain_overflow_dont, /* complain_on_overflow */ |
| 304 | bfd_elf_generic_reloc, /* special_function */ |
| 305 | "R_AARCH64_NULL", /* name */ |
| 306 | FALSE, /* partial_inplace */ |
| 307 | 0, /* src_mask */ |
| 308 | 0, /* dst_mask */ |
| 309 | FALSE), /* pcrel_offset */ |
| 310 | #else |
| 311 | HOWTO (R_AARCH64_NONE, /* type */ |
| 312 | 0, /* rightshift */ |
| 313 | 3, /* size (0 = byte, 1 = short, 2 = long) */ |
| 314 | 0, /* bitsize */ |
| 315 | FALSE, /* pc_relative */ |
| 316 | 0, /* bitpos */ |
| 317 | complain_overflow_dont, /* complain_on_overflow */ |
| 318 | bfd_elf_generic_reloc, /* special_function */ |
| 319 | "R_AARCH64_NONE", /* name */ |
| 320 | FALSE, /* partial_inplace */ |
| 321 | 0, /* src_mask */ |
| 322 | 0, /* dst_mask */ |
| 323 | FALSE), /* pcrel_offset */ |
| 324 | #endif |
| 325 | |
| 326 | /* .xword: (S+A) */ |
| 327 | HOWTO64 (AARCH64_R (ABS64), /* type */ |
| 328 | 0, /* rightshift */ |
| 329 | 4, /* size (4 = long long) */ |
| 330 | 64, /* bitsize */ |
| 331 | FALSE, /* pc_relative */ |
| 332 | 0, /* bitpos */ |
| 333 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 334 | bfd_elf_generic_reloc, /* special_function */ |
| 335 | AARCH64_R_STR (ABS64), /* name */ |
| 336 | FALSE, /* partial_inplace */ |
| 337 | ALL_ONES, /* src_mask */ |
| 338 | ALL_ONES, /* dst_mask */ |
| 339 | FALSE), /* pcrel_offset */ |
| 340 | |
| 341 | /* .word: (S+A) */ |
| 342 | HOWTO (AARCH64_R (ABS32), /* type */ |
| 343 | 0, /* rightshift */ |
| 344 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 345 | 32, /* bitsize */ |
| 346 | FALSE, /* pc_relative */ |
| 347 | 0, /* bitpos */ |
| 348 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 349 | bfd_elf_generic_reloc, /* special_function */ |
| 350 | AARCH64_R_STR (ABS32), /* name */ |
| 351 | FALSE, /* partial_inplace */ |
| 352 | 0xffffffff, /* src_mask */ |
| 353 | 0xffffffff, /* dst_mask */ |
| 354 | FALSE), /* pcrel_offset */ |
| 355 | |
| 356 | /* .half: (S+A) */ |
| 357 | HOWTO (AARCH64_R (ABS16), /* type */ |
| 358 | 0, /* rightshift */ |
| 359 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 360 | 16, /* bitsize */ |
| 361 | FALSE, /* pc_relative */ |
| 362 | 0, /* bitpos */ |
| 363 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 364 | bfd_elf_generic_reloc, /* special_function */ |
| 365 | AARCH64_R_STR (ABS16), /* name */ |
| 366 | FALSE, /* partial_inplace */ |
| 367 | 0xffff, /* src_mask */ |
| 368 | 0xffff, /* dst_mask */ |
| 369 | FALSE), /* pcrel_offset */ |
| 370 | |
| 371 | /* .xword: (S+A-P) */ |
| 372 | HOWTO64 (AARCH64_R (PREL64), /* type */ |
| 373 | 0, /* rightshift */ |
| 374 | 4, /* size (4 = long long) */ |
| 375 | 64, /* bitsize */ |
| 376 | TRUE, /* pc_relative */ |
| 377 | 0, /* bitpos */ |
| 378 | complain_overflow_signed, /* complain_on_overflow */ |
| 379 | bfd_elf_generic_reloc, /* special_function */ |
| 380 | AARCH64_R_STR (PREL64), /* name */ |
| 381 | FALSE, /* partial_inplace */ |
| 382 | ALL_ONES, /* src_mask */ |
| 383 | ALL_ONES, /* dst_mask */ |
| 384 | TRUE), /* pcrel_offset */ |
| 385 | |
| 386 | /* .word: (S+A-P) */ |
| 387 | HOWTO (AARCH64_R (PREL32), /* type */ |
| 388 | 0, /* rightshift */ |
| 389 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 390 | 32, /* bitsize */ |
| 391 | TRUE, /* pc_relative */ |
| 392 | 0, /* bitpos */ |
| 393 | complain_overflow_signed, /* complain_on_overflow */ |
| 394 | bfd_elf_generic_reloc, /* special_function */ |
| 395 | AARCH64_R_STR (PREL32), /* name */ |
| 396 | FALSE, /* partial_inplace */ |
| 397 | 0xffffffff, /* src_mask */ |
| 398 | 0xffffffff, /* dst_mask */ |
| 399 | TRUE), /* pcrel_offset */ |
| 400 | |
| 401 | /* .half: (S+A-P) */ |
| 402 | HOWTO (AARCH64_R (PREL16), /* type */ |
| 403 | 0, /* rightshift */ |
| 404 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 405 | 16, /* bitsize */ |
| 406 | TRUE, /* pc_relative */ |
| 407 | 0, /* bitpos */ |
| 408 | complain_overflow_signed, /* complain_on_overflow */ |
| 409 | bfd_elf_generic_reloc, /* special_function */ |
| 410 | AARCH64_R_STR (PREL16), /* name */ |
| 411 | FALSE, /* partial_inplace */ |
| 412 | 0xffff, /* src_mask */ |
| 413 | 0xffff, /* dst_mask */ |
| 414 | TRUE), /* pcrel_offset */ |
| 415 | |
| 416 | /* Group relocations to create a 16, 32, 48 or 64 bit |
| 417 | unsigned data or abs address inline. */ |
| 418 | |
| 419 | /* MOVZ: ((S+A) >> 0) & 0xffff */ |
| 420 | HOWTO (AARCH64_R (MOVW_UABS_G0), /* type */ |
| 421 | 0, /* rightshift */ |
| 422 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 423 | 16, /* bitsize */ |
| 424 | FALSE, /* pc_relative */ |
| 425 | 0, /* bitpos */ |
| 426 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 427 | bfd_elf_generic_reloc, /* special_function */ |
| 428 | AARCH64_R_STR (MOVW_UABS_G0), /* name */ |
| 429 | FALSE, /* partial_inplace */ |
| 430 | 0xffff, /* src_mask */ |
| 431 | 0xffff, /* dst_mask */ |
| 432 | FALSE), /* pcrel_offset */ |
| 433 | |
| 434 | /* MOVK: ((S+A) >> 0) & 0xffff [no overflow check] */ |
| 435 | HOWTO (AARCH64_R (MOVW_UABS_G0_NC), /* type */ |
| 436 | 0, /* rightshift */ |
| 437 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 438 | 16, /* bitsize */ |
| 439 | FALSE, /* pc_relative */ |
| 440 | 0, /* bitpos */ |
| 441 | complain_overflow_dont, /* complain_on_overflow */ |
| 442 | bfd_elf_generic_reloc, /* special_function */ |
| 443 | AARCH64_R_STR (MOVW_UABS_G0_NC), /* name */ |
| 444 | FALSE, /* partial_inplace */ |
| 445 | 0xffff, /* src_mask */ |
| 446 | 0xffff, /* dst_mask */ |
| 447 | FALSE), /* pcrel_offset */ |
| 448 | |
| 449 | /* MOVZ: ((S+A) >> 16) & 0xffff */ |
| 450 | HOWTO (AARCH64_R (MOVW_UABS_G1), /* type */ |
| 451 | 16, /* rightshift */ |
| 452 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 453 | 16, /* bitsize */ |
| 454 | FALSE, /* pc_relative */ |
| 455 | 0, /* bitpos */ |
| 456 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 457 | bfd_elf_generic_reloc, /* special_function */ |
| 458 | AARCH64_R_STR (MOVW_UABS_G1), /* name */ |
| 459 | FALSE, /* partial_inplace */ |
| 460 | 0xffff, /* src_mask */ |
| 461 | 0xffff, /* dst_mask */ |
| 462 | FALSE), /* pcrel_offset */ |
| 463 | |
| 464 | /* MOVK: ((S+A) >> 16) & 0xffff [no overflow check] */ |
| 465 | HOWTO64 (AARCH64_R (MOVW_UABS_G1_NC), /* type */ |
| 466 | 16, /* rightshift */ |
| 467 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 468 | 16, /* bitsize */ |
| 469 | FALSE, /* pc_relative */ |
| 470 | 0, /* bitpos */ |
| 471 | complain_overflow_dont, /* complain_on_overflow */ |
| 472 | bfd_elf_generic_reloc, /* special_function */ |
| 473 | AARCH64_R_STR (MOVW_UABS_G1_NC), /* name */ |
| 474 | FALSE, /* partial_inplace */ |
| 475 | 0xffff, /* src_mask */ |
| 476 | 0xffff, /* dst_mask */ |
| 477 | FALSE), /* pcrel_offset */ |
| 478 | |
| 479 | /* MOVZ: ((S+A) >> 32) & 0xffff */ |
| 480 | HOWTO64 (AARCH64_R (MOVW_UABS_G2), /* type */ |
| 481 | 32, /* rightshift */ |
| 482 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 483 | 16, /* bitsize */ |
| 484 | FALSE, /* pc_relative */ |
| 485 | 0, /* bitpos */ |
| 486 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 487 | bfd_elf_generic_reloc, /* special_function */ |
| 488 | AARCH64_R_STR (MOVW_UABS_G2), /* name */ |
| 489 | FALSE, /* partial_inplace */ |
| 490 | 0xffff, /* src_mask */ |
| 491 | 0xffff, /* dst_mask */ |
| 492 | FALSE), /* pcrel_offset */ |
| 493 | |
| 494 | /* MOVK: ((S+A) >> 32) & 0xffff [no overflow check] */ |
| 495 | HOWTO64 (AARCH64_R (MOVW_UABS_G2_NC), /* type */ |
| 496 | 32, /* rightshift */ |
| 497 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 498 | 16, /* bitsize */ |
| 499 | FALSE, /* pc_relative */ |
| 500 | 0, /* bitpos */ |
| 501 | complain_overflow_dont, /* complain_on_overflow */ |
| 502 | bfd_elf_generic_reloc, /* special_function */ |
| 503 | AARCH64_R_STR (MOVW_UABS_G2_NC), /* name */ |
| 504 | FALSE, /* partial_inplace */ |
| 505 | 0xffff, /* src_mask */ |
| 506 | 0xffff, /* dst_mask */ |
| 507 | FALSE), /* pcrel_offset */ |
| 508 | |
| 509 | /* MOVZ: ((S+A) >> 48) & 0xffff */ |
| 510 | HOWTO64 (AARCH64_R (MOVW_UABS_G3), /* type */ |
| 511 | 48, /* rightshift */ |
| 512 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 513 | 16, /* bitsize */ |
| 514 | FALSE, /* pc_relative */ |
| 515 | 0, /* bitpos */ |
| 516 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 517 | bfd_elf_generic_reloc, /* special_function */ |
| 518 | AARCH64_R_STR (MOVW_UABS_G3), /* name */ |
| 519 | FALSE, /* partial_inplace */ |
| 520 | 0xffff, /* src_mask */ |
| 521 | 0xffff, /* dst_mask */ |
| 522 | FALSE), /* pcrel_offset */ |
| 523 | |
| 524 | /* Group relocations to create high part of a 16, 32, 48 or 64 bit |
| 525 | signed data or abs address inline. Will change instruction |
| 526 | to MOVN or MOVZ depending on sign of calculated value. */ |
| 527 | |
| 528 | /* MOV[ZN]: ((S+A) >> 0) & 0xffff */ |
| 529 | HOWTO (AARCH64_R (MOVW_SABS_G0), /* type */ |
| 530 | 0, /* rightshift */ |
| 531 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 532 | 16, /* bitsize */ |
| 533 | FALSE, /* pc_relative */ |
| 534 | 0, /* bitpos */ |
| 535 | complain_overflow_signed, /* complain_on_overflow */ |
| 536 | bfd_elf_generic_reloc, /* special_function */ |
| 537 | AARCH64_R_STR (MOVW_SABS_G0), /* name */ |
| 538 | FALSE, /* partial_inplace */ |
| 539 | 0xffff, /* src_mask */ |
| 540 | 0xffff, /* dst_mask */ |
| 541 | FALSE), /* pcrel_offset */ |
| 542 | |
| 543 | /* MOV[ZN]: ((S+A) >> 16) & 0xffff */ |
| 544 | HOWTO64 (AARCH64_R (MOVW_SABS_G1), /* type */ |
| 545 | 16, /* rightshift */ |
| 546 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 547 | 16, /* bitsize */ |
| 548 | FALSE, /* pc_relative */ |
| 549 | 0, /* bitpos */ |
| 550 | complain_overflow_signed, /* complain_on_overflow */ |
| 551 | bfd_elf_generic_reloc, /* special_function */ |
| 552 | AARCH64_R_STR (MOVW_SABS_G1), /* name */ |
| 553 | FALSE, /* partial_inplace */ |
| 554 | 0xffff, /* src_mask */ |
| 555 | 0xffff, /* dst_mask */ |
| 556 | FALSE), /* pcrel_offset */ |
| 557 | |
| 558 | /* MOV[ZN]: ((S+A) >> 32) & 0xffff */ |
| 559 | HOWTO64 (AARCH64_R (MOVW_SABS_G2), /* type */ |
| 560 | 32, /* rightshift */ |
| 561 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 562 | 16, /* bitsize */ |
| 563 | FALSE, /* pc_relative */ |
| 564 | 0, /* bitpos */ |
| 565 | complain_overflow_signed, /* complain_on_overflow */ |
| 566 | bfd_elf_generic_reloc, /* special_function */ |
| 567 | AARCH64_R_STR (MOVW_SABS_G2), /* name */ |
| 568 | FALSE, /* partial_inplace */ |
| 569 | 0xffff, /* src_mask */ |
| 570 | 0xffff, /* dst_mask */ |
| 571 | FALSE), /* pcrel_offset */ |
| 572 | |
| 573 | /* Relocations to generate 19, 21 and 33 bit PC-relative load/store |
| 574 | addresses: PG(x) is (x & ~0xfff). */ |
| 575 | |
| 576 | /* LD-lit: ((S+A-P) >> 2) & 0x7ffff */ |
| 577 | HOWTO (AARCH64_R (LD_PREL_LO19), /* type */ |
| 578 | 2, /* rightshift */ |
| 579 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 580 | 19, /* bitsize */ |
| 581 | TRUE, /* pc_relative */ |
| 582 | 0, /* bitpos */ |
| 583 | complain_overflow_signed, /* complain_on_overflow */ |
| 584 | bfd_elf_generic_reloc, /* special_function */ |
| 585 | AARCH64_R_STR (LD_PREL_LO19), /* name */ |
| 586 | FALSE, /* partial_inplace */ |
| 587 | 0x7ffff, /* src_mask */ |
| 588 | 0x7ffff, /* dst_mask */ |
| 589 | TRUE), /* pcrel_offset */ |
| 590 | |
| 591 | /* ADR: (S+A-P) & 0x1fffff */ |
| 592 | HOWTO (AARCH64_R (ADR_PREL_LO21), /* type */ |
| 593 | 0, /* rightshift */ |
| 594 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 595 | 21, /* bitsize */ |
| 596 | TRUE, /* pc_relative */ |
| 597 | 0, /* bitpos */ |
| 598 | complain_overflow_signed, /* complain_on_overflow */ |
| 599 | bfd_elf_generic_reloc, /* special_function */ |
| 600 | AARCH64_R_STR (ADR_PREL_LO21), /* name */ |
| 601 | FALSE, /* partial_inplace */ |
| 602 | 0x1fffff, /* src_mask */ |
| 603 | 0x1fffff, /* dst_mask */ |
| 604 | TRUE), /* pcrel_offset */ |
| 605 | |
| 606 | /* ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */ |
| 607 | HOWTO (AARCH64_R (ADR_PREL_PG_HI21), /* type */ |
| 608 | 12, /* rightshift */ |
| 609 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 610 | 21, /* bitsize */ |
| 611 | TRUE, /* pc_relative */ |
| 612 | 0, /* bitpos */ |
| 613 | complain_overflow_signed, /* complain_on_overflow */ |
| 614 | bfd_elf_generic_reloc, /* special_function */ |
| 615 | AARCH64_R_STR (ADR_PREL_PG_HI21), /* name */ |
| 616 | FALSE, /* partial_inplace */ |
| 617 | 0x1fffff, /* src_mask */ |
| 618 | 0x1fffff, /* dst_mask */ |
| 619 | TRUE), /* pcrel_offset */ |
| 620 | |
| 621 | /* ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff [no overflow check] */ |
| 622 | HOWTO64 (AARCH64_R (ADR_PREL_PG_HI21_NC), /* type */ |
| 623 | 12, /* rightshift */ |
| 624 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 625 | 21, /* bitsize */ |
| 626 | TRUE, /* pc_relative */ |
| 627 | 0, /* bitpos */ |
| 628 | complain_overflow_dont, /* complain_on_overflow */ |
| 629 | bfd_elf_generic_reloc, /* special_function */ |
| 630 | AARCH64_R_STR (ADR_PREL_PG_HI21_NC), /* name */ |
| 631 | FALSE, /* partial_inplace */ |
| 632 | 0x1fffff, /* src_mask */ |
| 633 | 0x1fffff, /* dst_mask */ |
| 634 | TRUE), /* pcrel_offset */ |
| 635 | |
| 636 | /* ADD: (S+A) & 0xfff [no overflow check] */ |
| 637 | HOWTO (AARCH64_R (ADD_ABS_LO12_NC), /* type */ |
| 638 | 0, /* rightshift */ |
| 639 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 640 | 12, /* bitsize */ |
| 641 | FALSE, /* pc_relative */ |
| 642 | 10, /* bitpos */ |
| 643 | complain_overflow_dont, /* complain_on_overflow */ |
| 644 | bfd_elf_generic_reloc, /* special_function */ |
| 645 | AARCH64_R_STR (ADD_ABS_LO12_NC), /* name */ |
| 646 | FALSE, /* partial_inplace */ |
| 647 | 0x3ffc00, /* src_mask */ |
| 648 | 0x3ffc00, /* dst_mask */ |
| 649 | FALSE), /* pcrel_offset */ |
| 650 | |
| 651 | /* LD/ST8: (S+A) & 0xfff */ |
| 652 | HOWTO (AARCH64_R (LDST8_ABS_LO12_NC), /* type */ |
| 653 | 0, /* rightshift */ |
| 654 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 655 | 12, /* bitsize */ |
| 656 | FALSE, /* pc_relative */ |
| 657 | 0, /* bitpos */ |
| 658 | complain_overflow_dont, /* complain_on_overflow */ |
| 659 | bfd_elf_generic_reloc, /* special_function */ |
| 660 | AARCH64_R_STR (LDST8_ABS_LO12_NC), /* name */ |
| 661 | FALSE, /* partial_inplace */ |
| 662 | 0xfff, /* src_mask */ |
| 663 | 0xfff, /* dst_mask */ |
| 664 | FALSE), /* pcrel_offset */ |
| 665 | |
| 666 | /* Relocations for control-flow instructions. */ |
| 667 | |
| 668 | /* TBZ/NZ: ((S+A-P) >> 2) & 0x3fff */ |
| 669 | HOWTO (AARCH64_R (TSTBR14), /* type */ |
| 670 | 2, /* rightshift */ |
| 671 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 672 | 14, /* bitsize */ |
| 673 | TRUE, /* pc_relative */ |
| 674 | 0, /* bitpos */ |
| 675 | complain_overflow_signed, /* complain_on_overflow */ |
| 676 | bfd_elf_generic_reloc, /* special_function */ |
| 677 | AARCH64_R_STR (TSTBR14), /* name */ |
| 678 | FALSE, /* partial_inplace */ |
| 679 | 0x3fff, /* src_mask */ |
| 680 | 0x3fff, /* dst_mask */ |
| 681 | TRUE), /* pcrel_offset */ |
| 682 | |
| 683 | /* B.cond: ((S+A-P) >> 2) & 0x7ffff */ |
| 684 | HOWTO (AARCH64_R (CONDBR19), /* type */ |
| 685 | 2, /* rightshift */ |
| 686 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 687 | 19, /* 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 (CONDBR19), /* name */ |
| 693 | FALSE, /* partial_inplace */ |
| 694 | 0x7ffff, /* src_mask */ |
| 695 | 0x7ffff, /* dst_mask */ |
| 696 | TRUE), /* pcrel_offset */ |
| 697 | |
| 698 | /* B: ((S+A-P) >> 2) & 0x3ffffff */ |
| 699 | HOWTO (AARCH64_R (JUMP26), /* type */ |
| 700 | 2, /* rightshift */ |
| 701 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 702 | 26, /* bitsize */ |
| 703 | TRUE, /* pc_relative */ |
| 704 | 0, /* bitpos */ |
| 705 | complain_overflow_signed, /* complain_on_overflow */ |
| 706 | bfd_elf_generic_reloc, /* special_function */ |
| 707 | AARCH64_R_STR (JUMP26), /* name */ |
| 708 | FALSE, /* partial_inplace */ |
| 709 | 0x3ffffff, /* src_mask */ |
| 710 | 0x3ffffff, /* dst_mask */ |
| 711 | TRUE), /* pcrel_offset */ |
| 712 | |
| 713 | /* BL: ((S+A-P) >> 2) & 0x3ffffff */ |
| 714 | HOWTO (AARCH64_R (CALL26), /* type */ |
| 715 | 2, /* rightshift */ |
| 716 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 717 | 26, /* bitsize */ |
| 718 | TRUE, /* pc_relative */ |
| 719 | 0, /* bitpos */ |
| 720 | complain_overflow_signed, /* complain_on_overflow */ |
| 721 | bfd_elf_generic_reloc, /* special_function */ |
| 722 | AARCH64_R_STR (CALL26), /* name */ |
| 723 | FALSE, /* partial_inplace */ |
| 724 | 0x3ffffff, /* src_mask */ |
| 725 | 0x3ffffff, /* dst_mask */ |
| 726 | TRUE), /* pcrel_offset */ |
| 727 | |
| 728 | /* LD/ST16: (S+A) & 0xffe */ |
| 729 | HOWTO (AARCH64_R (LDST16_ABS_LO12_NC), /* type */ |
| 730 | 1, /* rightshift */ |
| 731 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 732 | 12, /* bitsize */ |
| 733 | FALSE, /* pc_relative */ |
| 734 | 0, /* bitpos */ |
| 735 | complain_overflow_dont, /* complain_on_overflow */ |
| 736 | bfd_elf_generic_reloc, /* special_function */ |
| 737 | AARCH64_R_STR (LDST16_ABS_LO12_NC), /* name */ |
| 738 | FALSE, /* partial_inplace */ |
| 739 | 0xffe, /* src_mask */ |
| 740 | 0xffe, /* dst_mask */ |
| 741 | FALSE), /* pcrel_offset */ |
| 742 | |
| 743 | /* LD/ST32: (S+A) & 0xffc */ |
| 744 | HOWTO (AARCH64_R (LDST32_ABS_LO12_NC), /* type */ |
| 745 | 2, /* rightshift */ |
| 746 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 747 | 12, /* bitsize */ |
| 748 | FALSE, /* pc_relative */ |
| 749 | 0, /* bitpos */ |
| 750 | complain_overflow_dont, /* complain_on_overflow */ |
| 751 | bfd_elf_generic_reloc, /* special_function */ |
| 752 | AARCH64_R_STR (LDST32_ABS_LO12_NC), /* name */ |
| 753 | FALSE, /* partial_inplace */ |
| 754 | 0xffc, /* src_mask */ |
| 755 | 0xffc, /* dst_mask */ |
| 756 | FALSE), /* pcrel_offset */ |
| 757 | |
| 758 | /* LD/ST64: (S+A) & 0xff8 */ |
| 759 | HOWTO (AARCH64_R (LDST64_ABS_LO12_NC), /* type */ |
| 760 | 3, /* rightshift */ |
| 761 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 762 | 12, /* bitsize */ |
| 763 | FALSE, /* pc_relative */ |
| 764 | 0, /* bitpos */ |
| 765 | complain_overflow_dont, /* complain_on_overflow */ |
| 766 | bfd_elf_generic_reloc, /* special_function */ |
| 767 | AARCH64_R_STR (LDST64_ABS_LO12_NC), /* name */ |
| 768 | FALSE, /* partial_inplace */ |
| 769 | 0xff8, /* src_mask */ |
| 770 | 0xff8, /* dst_mask */ |
| 771 | FALSE), /* pcrel_offset */ |
| 772 | |
| 773 | /* LD/ST128: (S+A) & 0xff0 */ |
| 774 | HOWTO (AARCH64_R (LDST128_ABS_LO12_NC), /* type */ |
| 775 | 4, /* rightshift */ |
| 776 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 777 | 12, /* bitsize */ |
| 778 | FALSE, /* pc_relative */ |
| 779 | 0, /* bitpos */ |
| 780 | complain_overflow_dont, /* complain_on_overflow */ |
| 781 | bfd_elf_generic_reloc, /* special_function */ |
| 782 | AARCH64_R_STR (LDST128_ABS_LO12_NC), /* name */ |
| 783 | FALSE, /* partial_inplace */ |
| 784 | 0xff0, /* src_mask */ |
| 785 | 0xff0, /* dst_mask */ |
| 786 | FALSE), /* pcrel_offset */ |
| 787 | |
| 788 | /* Set a load-literal immediate field to bits |
| 789 | 0x1FFFFC of G(S)-P */ |
| 790 | HOWTO (AARCH64_R (GOT_LD_PREL19), /* type */ |
| 791 | 2, /* rightshift */ |
| 792 | 2, /* size (0 = byte,1 = short,2 = long) */ |
| 793 | 19, /* bitsize */ |
| 794 | TRUE, /* pc_relative */ |
| 795 | 0, /* bitpos */ |
| 796 | complain_overflow_signed, /* complain_on_overflow */ |
| 797 | bfd_elf_generic_reloc, /* special_function */ |
| 798 | AARCH64_R_STR (GOT_LD_PREL19), /* name */ |
| 799 | FALSE, /* partial_inplace */ |
| 800 | 0xffffe0, /* src_mask */ |
| 801 | 0xffffe0, /* dst_mask */ |
| 802 | TRUE), /* pcrel_offset */ |
| 803 | |
| 804 | /* Get to the page for the GOT entry for the symbol |
| 805 | (G(S) - P) using an ADRP instruction. */ |
| 806 | HOWTO (AARCH64_R (ADR_GOT_PAGE), /* type */ |
| 807 | 12, /* rightshift */ |
| 808 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 809 | 21, /* bitsize */ |
| 810 | TRUE, /* pc_relative */ |
| 811 | 0, /* bitpos */ |
| 812 | complain_overflow_dont, /* complain_on_overflow */ |
| 813 | bfd_elf_generic_reloc, /* special_function */ |
| 814 | AARCH64_R_STR (ADR_GOT_PAGE), /* name */ |
| 815 | FALSE, /* partial_inplace */ |
| 816 | 0x1fffff, /* src_mask */ |
| 817 | 0x1fffff, /* dst_mask */ |
| 818 | TRUE), /* pcrel_offset */ |
| 819 | |
| 820 | /* LD64: GOT offset G(S) & 0xff8 */ |
| 821 | HOWTO64 (AARCH64_R (LD64_GOT_LO12_NC), /* type */ |
| 822 | 3, /* rightshift */ |
| 823 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 824 | 12, /* bitsize */ |
| 825 | FALSE, /* pc_relative */ |
| 826 | 0, /* bitpos */ |
| 827 | complain_overflow_dont, /* complain_on_overflow */ |
| 828 | bfd_elf_generic_reloc, /* special_function */ |
| 829 | AARCH64_R_STR (LD64_GOT_LO12_NC), /* name */ |
| 830 | FALSE, /* partial_inplace */ |
| 831 | 0xff8, /* src_mask */ |
| 832 | 0xff8, /* dst_mask */ |
| 833 | FALSE), /* pcrel_offset */ |
| 834 | |
| 835 | /* LD32: GOT offset G(S) & 0xffc */ |
| 836 | HOWTO32 (AARCH64_R (LD32_GOT_LO12_NC), /* type */ |
| 837 | 2, /* rightshift */ |
| 838 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 839 | 12, /* bitsize */ |
| 840 | FALSE, /* pc_relative */ |
| 841 | 0, /* bitpos */ |
| 842 | complain_overflow_dont, /* complain_on_overflow */ |
| 843 | bfd_elf_generic_reloc, /* special_function */ |
| 844 | AARCH64_R_STR (LD32_GOT_LO12_NC), /* name */ |
| 845 | FALSE, /* partial_inplace */ |
| 846 | 0xffc, /* src_mask */ |
| 847 | 0xffc, /* dst_mask */ |
| 848 | FALSE), /* pcrel_offset */ |
| 849 | |
| 850 | /* Get to the page for the GOT entry for the symbol |
| 851 | (G(S) - P) using an ADRP instruction. */ |
| 852 | HOWTO (AARCH64_R (TLSGD_ADR_PAGE21), /* type */ |
| 853 | 12, /* rightshift */ |
| 854 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 855 | 21, /* bitsize */ |
| 856 | TRUE, /* pc_relative */ |
| 857 | 0, /* bitpos */ |
| 858 | complain_overflow_dont, /* complain_on_overflow */ |
| 859 | bfd_elf_generic_reloc, /* special_function */ |
| 860 | AARCH64_R_STR (TLSGD_ADR_PAGE21), /* name */ |
| 861 | FALSE, /* partial_inplace */ |
| 862 | 0x1fffff, /* src_mask */ |
| 863 | 0x1fffff, /* dst_mask */ |
| 864 | TRUE), /* pcrel_offset */ |
| 865 | |
| 866 | /* ADD: GOT offset G(S) & 0xff8 [no overflow check] */ |
| 867 | HOWTO (AARCH64_R (TLSGD_ADD_LO12_NC), /* type */ |
| 868 | 0, /* rightshift */ |
| 869 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 870 | 12, /* bitsize */ |
| 871 | FALSE, /* pc_relative */ |
| 872 | 0, /* bitpos */ |
| 873 | complain_overflow_dont, /* complain_on_overflow */ |
| 874 | bfd_elf_generic_reloc, /* special_function */ |
| 875 | AARCH64_R_STR (TLSGD_ADD_LO12_NC), /* name */ |
| 876 | FALSE, /* partial_inplace */ |
| 877 | 0xfff, /* src_mask */ |
| 878 | 0xfff, /* dst_mask */ |
| 879 | FALSE), /* pcrel_offset */ |
| 880 | |
| 881 | HOWTO64 (AARCH64_R (TLSIE_MOVW_GOTTPREL_G1), /* type */ |
| 882 | 16, /* rightshift */ |
| 883 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 884 | 16, /* bitsize */ |
| 885 | FALSE, /* pc_relative */ |
| 886 | 0, /* bitpos */ |
| 887 | complain_overflow_dont, /* complain_on_overflow */ |
| 888 | bfd_elf_generic_reloc, /* special_function */ |
| 889 | AARCH64_R_STR (TLSIE_MOVW_GOTTPREL_G1), /* name */ |
| 890 | FALSE, /* partial_inplace */ |
| 891 | 0xffff, /* src_mask */ |
| 892 | 0xffff, /* dst_mask */ |
| 893 | FALSE), /* pcrel_offset */ |
| 894 | |
| 895 | HOWTO64 (AARCH64_R (TLSIE_MOVW_GOTTPREL_G0_NC), /* type */ |
| 896 | 0, /* rightshift */ |
| 897 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 898 | 32, /* bitsize */ |
| 899 | FALSE, /* pc_relative */ |
| 900 | 0, /* bitpos */ |
| 901 | complain_overflow_dont, /* complain_on_overflow */ |
| 902 | bfd_elf_generic_reloc, /* special_function */ |
| 903 | AARCH64_R_STR (TLSIE_MOVW_GOTTPREL_G0_NC), /* name */ |
| 904 | FALSE, /* partial_inplace */ |
| 905 | 0xffff, /* src_mask */ |
| 906 | 0xffff, /* dst_mask */ |
| 907 | FALSE), /* pcrel_offset */ |
| 908 | |
| 909 | HOWTO (AARCH64_R (TLSIE_ADR_GOTTPREL_PAGE21), /* type */ |
| 910 | 12, /* rightshift */ |
| 911 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 912 | 21, /* bitsize */ |
| 913 | FALSE, /* pc_relative */ |
| 914 | 0, /* bitpos */ |
| 915 | complain_overflow_dont, /* complain_on_overflow */ |
| 916 | bfd_elf_generic_reloc, /* special_function */ |
| 917 | AARCH64_R_STR (TLSIE_ADR_GOTTPREL_PAGE21), /* name */ |
| 918 | FALSE, /* partial_inplace */ |
| 919 | 0x1fffff, /* src_mask */ |
| 920 | 0x1fffff, /* dst_mask */ |
| 921 | FALSE), /* pcrel_offset */ |
| 922 | |
| 923 | HOWTO64 (AARCH64_R (TLSIE_LD64_GOTTPREL_LO12_NC), /* type */ |
| 924 | 3, /* rightshift */ |
| 925 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 926 | 12, /* bitsize */ |
| 927 | FALSE, /* pc_relative */ |
| 928 | 0, /* bitpos */ |
| 929 | complain_overflow_dont, /* complain_on_overflow */ |
| 930 | bfd_elf_generic_reloc, /* special_function */ |
| 931 | AARCH64_R_STR (TLSIE_LD64_GOTTPREL_LO12_NC), /* name */ |
| 932 | FALSE, /* partial_inplace */ |
| 933 | 0xff8, /* src_mask */ |
| 934 | 0xff8, /* dst_mask */ |
| 935 | FALSE), /* pcrel_offset */ |
| 936 | |
| 937 | HOWTO32 (AARCH64_R (TLSIE_LD32_GOTTPREL_LO12_NC), /* type */ |
| 938 | 2, /* rightshift */ |
| 939 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 940 | 12, /* bitsize */ |
| 941 | FALSE, /* pc_relative */ |
| 942 | 0, /* bitpos */ |
| 943 | complain_overflow_dont, /* complain_on_overflow */ |
| 944 | bfd_elf_generic_reloc, /* special_function */ |
| 945 | AARCH64_R_STR (TLSIE_LD32_GOTTPREL_LO12_NC), /* name */ |
| 946 | FALSE, /* partial_inplace */ |
| 947 | 0xffc, /* src_mask */ |
| 948 | 0xffc, /* dst_mask */ |
| 949 | FALSE), /* pcrel_offset */ |
| 950 | |
| 951 | HOWTO (AARCH64_R (TLSIE_LD_GOTTPREL_PREL19), /* type */ |
| 952 | 2, /* rightshift */ |
| 953 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 954 | 21, /* bitsize */ |
| 955 | FALSE, /* pc_relative */ |
| 956 | 0, /* bitpos */ |
| 957 | complain_overflow_dont, /* complain_on_overflow */ |
| 958 | bfd_elf_generic_reloc, /* special_function */ |
| 959 | AARCH64_R_STR (TLSIE_LD_GOTTPREL_PREL19), /* name */ |
| 960 | FALSE, /* partial_inplace */ |
| 961 | 0x1ffffc, /* src_mask */ |
| 962 | 0x1ffffc, /* dst_mask */ |
| 963 | FALSE), /* pcrel_offset */ |
| 964 | |
| 965 | HOWTO64 (AARCH64_R (TLSLE_MOVW_TPREL_G2), /* type */ |
| 966 | 32, /* rightshift */ |
| 967 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 968 | 12, /* bitsize */ |
| 969 | FALSE, /* pc_relative */ |
| 970 | 0, /* bitpos */ |
| 971 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 972 | bfd_elf_generic_reloc, /* special_function */ |
| 973 | AARCH64_R_STR (TLSLE_MOVW_TPREL_G2), /* name */ |
| 974 | FALSE, /* partial_inplace */ |
| 975 | 0xffff, /* src_mask */ |
| 976 | 0xffff, /* dst_mask */ |
| 977 | FALSE), /* pcrel_offset */ |
| 978 | |
| 979 | HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G1), /* type */ |
| 980 | 16, /* rightshift */ |
| 981 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 982 | 12, /* bitsize */ |
| 983 | FALSE, /* pc_relative */ |
| 984 | 0, /* bitpos */ |
| 985 | complain_overflow_dont, /* complain_on_overflow */ |
| 986 | bfd_elf_generic_reloc, /* special_function */ |
| 987 | AARCH64_R_STR (TLSLE_MOVW_TPREL_G1), /* name */ |
| 988 | FALSE, /* partial_inplace */ |
| 989 | 0xffff, /* src_mask */ |
| 990 | 0xffff, /* dst_mask */ |
| 991 | FALSE), /* pcrel_offset */ |
| 992 | |
| 993 | HOWTO64 (AARCH64_R (TLSLE_MOVW_TPREL_G1_NC), /* type */ |
| 994 | 16, /* rightshift */ |
| 995 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 996 | 12, /* bitsize */ |
| 997 | FALSE, /* pc_relative */ |
| 998 | 0, /* bitpos */ |
| 999 | complain_overflow_dont, /* complain_on_overflow */ |
| 1000 | bfd_elf_generic_reloc, /* special_function */ |
| 1001 | AARCH64_R_STR (TLSLE_MOVW_TPREL_G1_NC), /* name */ |
| 1002 | FALSE, /* partial_inplace */ |
| 1003 | 0xffff, /* src_mask */ |
| 1004 | 0xffff, /* dst_mask */ |
| 1005 | FALSE), /* pcrel_offset */ |
| 1006 | |
| 1007 | HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G0), /* type */ |
| 1008 | 0, /* rightshift */ |
| 1009 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1010 | 12, /* bitsize */ |
| 1011 | FALSE, /* pc_relative */ |
| 1012 | 0, /* bitpos */ |
| 1013 | complain_overflow_dont, /* complain_on_overflow */ |
| 1014 | bfd_elf_generic_reloc, /* special_function */ |
| 1015 | AARCH64_R_STR (TLSLE_MOVW_TPREL_G0), /* name */ |
| 1016 | FALSE, /* partial_inplace */ |
| 1017 | 0xffff, /* src_mask */ |
| 1018 | 0xffff, /* dst_mask */ |
| 1019 | FALSE), /* pcrel_offset */ |
| 1020 | |
| 1021 | HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G0_NC), /* type */ |
| 1022 | 0, /* rightshift */ |
| 1023 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1024 | 12, /* bitsize */ |
| 1025 | FALSE, /* pc_relative */ |
| 1026 | 0, /* bitpos */ |
| 1027 | complain_overflow_dont, /* complain_on_overflow */ |
| 1028 | bfd_elf_generic_reloc, /* special_function */ |
| 1029 | AARCH64_R_STR (TLSLE_MOVW_TPREL_G0_NC), /* name */ |
| 1030 | FALSE, /* partial_inplace */ |
| 1031 | 0xffff, /* src_mask */ |
| 1032 | 0xffff, /* dst_mask */ |
| 1033 | FALSE), /* pcrel_offset */ |
| 1034 | |
| 1035 | HOWTO (AARCH64_R (TLSLE_ADD_TPREL_HI12), /* type */ |
| 1036 | 12, /* rightshift */ |
| 1037 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1038 | 12, /* bitsize */ |
| 1039 | FALSE, /* pc_relative */ |
| 1040 | 0, /* bitpos */ |
| 1041 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 1042 | bfd_elf_generic_reloc, /* special_function */ |
| 1043 | AARCH64_R_STR (TLSLE_ADD_TPREL_HI12), /* name */ |
| 1044 | FALSE, /* partial_inplace */ |
| 1045 | 0xfff, /* src_mask */ |
| 1046 | 0xfff, /* dst_mask */ |
| 1047 | FALSE), /* pcrel_offset */ |
| 1048 | |
| 1049 | HOWTO (AARCH64_R (TLSLE_ADD_TPREL_LO12), /* type */ |
| 1050 | 0, /* rightshift */ |
| 1051 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1052 | 12, /* bitsize */ |
| 1053 | FALSE, /* pc_relative */ |
| 1054 | 0, /* bitpos */ |
| 1055 | complain_overflow_dont, /* complain_on_overflow */ |
| 1056 | bfd_elf_generic_reloc, /* special_function */ |
| 1057 | AARCH64_R_STR (TLSLE_ADD_TPREL_LO12), /* name */ |
| 1058 | FALSE, /* partial_inplace */ |
| 1059 | 0xfff, /* src_mask */ |
| 1060 | 0xfff, /* dst_mask */ |
| 1061 | FALSE), /* pcrel_offset */ |
| 1062 | |
| 1063 | HOWTO (AARCH64_R (TLSLE_ADD_TPREL_LO12_NC), /* type */ |
| 1064 | 0, /* rightshift */ |
| 1065 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1066 | 12, /* bitsize */ |
| 1067 | FALSE, /* pc_relative */ |
| 1068 | 0, /* bitpos */ |
| 1069 | complain_overflow_dont, /* complain_on_overflow */ |
| 1070 | bfd_elf_generic_reloc, /* special_function */ |
| 1071 | AARCH64_R_STR (TLSLE_ADD_TPREL_LO12_NC), /* name */ |
| 1072 | FALSE, /* partial_inplace */ |
| 1073 | 0xfff, /* src_mask */ |
| 1074 | 0xfff, /* dst_mask */ |
| 1075 | FALSE), /* pcrel_offset */ |
| 1076 | |
| 1077 | HOWTO (AARCH64_R (TLSDESC_LD_PREL19), /* type */ |
| 1078 | 2, /* rightshift */ |
| 1079 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1080 | 21, /* bitsize */ |
| 1081 | TRUE, /* pc_relative */ |
| 1082 | 0, /* bitpos */ |
| 1083 | complain_overflow_dont, /* complain_on_overflow */ |
| 1084 | bfd_elf_generic_reloc, /* special_function */ |
| 1085 | AARCH64_R_STR (TLSDESC_LD_PREL19), /* name */ |
| 1086 | FALSE, /* partial_inplace */ |
| 1087 | 0x1ffffc, /* src_mask */ |
| 1088 | 0x1ffffc, /* dst_mask */ |
| 1089 | TRUE), /* pcrel_offset */ |
| 1090 | |
| 1091 | HOWTO (AARCH64_R (TLSDESC_ADR_PREL21), /* type */ |
| 1092 | 0, /* rightshift */ |
| 1093 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1094 | 21, /* bitsize */ |
| 1095 | TRUE, /* pc_relative */ |
| 1096 | 0, /* bitpos */ |
| 1097 | complain_overflow_dont, /* complain_on_overflow */ |
| 1098 | bfd_elf_generic_reloc, /* special_function */ |
| 1099 | AARCH64_R_STR (TLSDESC_ADR_PREL21), /* name */ |
| 1100 | FALSE, /* partial_inplace */ |
| 1101 | 0x1fffff, /* src_mask */ |
| 1102 | 0x1fffff, /* dst_mask */ |
| 1103 | TRUE), /* pcrel_offset */ |
| 1104 | |
| 1105 | /* Get to the page for the GOT entry for the symbol |
| 1106 | (G(S) - P) using an ADRP instruction. */ |
| 1107 | HOWTO (AARCH64_R (TLSDESC_ADR_PAGE21), /* type */ |
| 1108 | 12, /* rightshift */ |
| 1109 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1110 | 21, /* bitsize */ |
| 1111 | TRUE, /* pc_relative */ |
| 1112 | 0, /* bitpos */ |
| 1113 | complain_overflow_dont, /* complain_on_overflow */ |
| 1114 | bfd_elf_generic_reloc, /* special_function */ |
| 1115 | AARCH64_R_STR (TLSDESC_ADR_PAGE21), /* name */ |
| 1116 | FALSE, /* partial_inplace */ |
| 1117 | 0x1fffff, /* src_mask */ |
| 1118 | 0x1fffff, /* dst_mask */ |
| 1119 | TRUE), /* pcrel_offset */ |
| 1120 | |
| 1121 | /* LD64: GOT offset G(S) & 0xff8. */ |
| 1122 | HOWTO64 (AARCH64_R (TLSDESC_LD64_LO12_NC), /* type */ |
| 1123 | 3, /* rightshift */ |
| 1124 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1125 | 12, /* bitsize */ |
| 1126 | FALSE, /* pc_relative */ |
| 1127 | 0, /* bitpos */ |
| 1128 | complain_overflow_dont, /* complain_on_overflow */ |
| 1129 | bfd_elf_generic_reloc, /* special_function */ |
| 1130 | AARCH64_R_STR (TLSDESC_LD64_LO12_NC), /* name */ |
| 1131 | FALSE, /* partial_inplace */ |
| 1132 | 0xff8, /* src_mask */ |
| 1133 | 0xff8, /* dst_mask */ |
| 1134 | FALSE), /* pcrel_offset */ |
| 1135 | |
| 1136 | /* LD32: GOT offset G(S) & 0xffc. */ |
| 1137 | HOWTO32 (AARCH64_R (TLSDESC_LD32_LO12_NC), /* type */ |
| 1138 | 2, /* rightshift */ |
| 1139 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1140 | 12, /* bitsize */ |
| 1141 | FALSE, /* pc_relative */ |
| 1142 | 0, /* bitpos */ |
| 1143 | complain_overflow_dont, /* complain_on_overflow */ |
| 1144 | bfd_elf_generic_reloc, /* special_function */ |
| 1145 | AARCH64_R_STR (TLSDESC_LD32_LO12_NC), /* name */ |
| 1146 | FALSE, /* partial_inplace */ |
| 1147 | 0xffc, /* src_mask */ |
| 1148 | 0xffc, /* dst_mask */ |
| 1149 | FALSE), /* pcrel_offset */ |
| 1150 | |
| 1151 | /* ADD: GOT offset G(S) & 0xfff. */ |
| 1152 | HOWTO (AARCH64_R (TLSDESC_ADD_LO12_NC), /* type */ |
| 1153 | 0, /* rightshift */ |
| 1154 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1155 | 12, /* bitsize */ |
| 1156 | FALSE, /* pc_relative */ |
| 1157 | 0, /* bitpos */ |
| 1158 | complain_overflow_dont, /* complain_on_overflow */ |
| 1159 | bfd_elf_generic_reloc, /* special_function */ |
| 1160 | AARCH64_R_STR (TLSDESC_ADD_LO12_NC), /* name */ |
| 1161 | FALSE, /* partial_inplace */ |
| 1162 | 0xfff, /* src_mask */ |
| 1163 | 0xfff, /* dst_mask */ |
| 1164 | FALSE), /* pcrel_offset */ |
| 1165 | |
| 1166 | HOWTO64 (AARCH64_R (TLSDESC_OFF_G1), /* type */ |
| 1167 | 16, /* rightshift */ |
| 1168 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1169 | 12, /* bitsize */ |
| 1170 | FALSE, /* pc_relative */ |
| 1171 | 0, /* bitpos */ |
| 1172 | complain_overflow_dont, /* complain_on_overflow */ |
| 1173 | bfd_elf_generic_reloc, /* special_function */ |
| 1174 | AARCH64_R_STR (TLSDESC_OFF_G1), /* name */ |
| 1175 | FALSE, /* partial_inplace */ |
| 1176 | 0xffff, /* src_mask */ |
| 1177 | 0xffff, /* dst_mask */ |
| 1178 | FALSE), /* pcrel_offset */ |
| 1179 | |
| 1180 | HOWTO64 (AARCH64_R (TLSDESC_OFF_G0_NC), /* type */ |
| 1181 | 0, /* rightshift */ |
| 1182 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1183 | 12, /* bitsize */ |
| 1184 | FALSE, /* pc_relative */ |
| 1185 | 0, /* bitpos */ |
| 1186 | complain_overflow_dont, /* complain_on_overflow */ |
| 1187 | bfd_elf_generic_reloc, /* special_function */ |
| 1188 | AARCH64_R_STR (TLSDESC_OFF_G0_NC), /* name */ |
| 1189 | FALSE, /* partial_inplace */ |
| 1190 | 0xffff, /* src_mask */ |
| 1191 | 0xffff, /* dst_mask */ |
| 1192 | FALSE), /* pcrel_offset */ |
| 1193 | |
| 1194 | HOWTO64 (AARCH64_R (TLSDESC_LDR), /* type */ |
| 1195 | 0, /* rightshift */ |
| 1196 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1197 | 12, /* bitsize */ |
| 1198 | FALSE, /* pc_relative */ |
| 1199 | 0, /* bitpos */ |
| 1200 | complain_overflow_dont, /* complain_on_overflow */ |
| 1201 | bfd_elf_generic_reloc, /* special_function */ |
| 1202 | AARCH64_R_STR (TLSDESC_LDR), /* name */ |
| 1203 | FALSE, /* partial_inplace */ |
| 1204 | 0x0, /* src_mask */ |
| 1205 | 0x0, /* dst_mask */ |
| 1206 | FALSE), /* pcrel_offset */ |
| 1207 | |
| 1208 | HOWTO64 (AARCH64_R (TLSDESC_ADD), /* type */ |
| 1209 | 0, /* rightshift */ |
| 1210 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1211 | 12, /* bitsize */ |
| 1212 | FALSE, /* pc_relative */ |
| 1213 | 0, /* bitpos */ |
| 1214 | complain_overflow_dont, /* complain_on_overflow */ |
| 1215 | bfd_elf_generic_reloc, /* special_function */ |
| 1216 | AARCH64_R_STR (TLSDESC_ADD), /* name */ |
| 1217 | FALSE, /* partial_inplace */ |
| 1218 | 0x0, /* src_mask */ |
| 1219 | 0x0, /* dst_mask */ |
| 1220 | FALSE), /* pcrel_offset */ |
| 1221 | |
| 1222 | HOWTO (AARCH64_R (TLSDESC_CALL), /* type */ |
| 1223 | 0, /* rightshift */ |
| 1224 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1225 | 12, /* bitsize */ |
| 1226 | FALSE, /* pc_relative */ |
| 1227 | 0, /* bitpos */ |
| 1228 | complain_overflow_dont, /* complain_on_overflow */ |
| 1229 | bfd_elf_generic_reloc, /* special_function */ |
| 1230 | AARCH64_R_STR (TLSDESC_CALL), /* name */ |
| 1231 | FALSE, /* partial_inplace */ |
| 1232 | 0x0, /* src_mask */ |
| 1233 | 0x0, /* dst_mask */ |
| 1234 | FALSE), /* pcrel_offset */ |
| 1235 | |
| 1236 | HOWTO (AARCH64_R (COPY), /* type */ |
| 1237 | 0, /* rightshift */ |
| 1238 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1239 | 64, /* bitsize */ |
| 1240 | FALSE, /* pc_relative */ |
| 1241 | 0, /* bitpos */ |
| 1242 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 1243 | bfd_elf_generic_reloc, /* special_function */ |
| 1244 | AARCH64_R_STR (COPY), /* name */ |
| 1245 | TRUE, /* partial_inplace */ |
| 1246 | 0xffffffff, /* src_mask */ |
| 1247 | 0xffffffff, /* dst_mask */ |
| 1248 | FALSE), /* pcrel_offset */ |
| 1249 | |
| 1250 | HOWTO (AARCH64_R (GLOB_DAT), /* type */ |
| 1251 | 0, /* rightshift */ |
| 1252 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1253 | 64, /* bitsize */ |
| 1254 | FALSE, /* pc_relative */ |
| 1255 | 0, /* bitpos */ |
| 1256 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 1257 | bfd_elf_generic_reloc, /* special_function */ |
| 1258 | AARCH64_R_STR (GLOB_DAT), /* name */ |
| 1259 | TRUE, /* partial_inplace */ |
| 1260 | 0xffffffff, /* src_mask */ |
| 1261 | 0xffffffff, /* dst_mask */ |
| 1262 | FALSE), /* pcrel_offset */ |
| 1263 | |
| 1264 | HOWTO (AARCH64_R (JUMP_SLOT), /* type */ |
| 1265 | 0, /* rightshift */ |
| 1266 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1267 | 64, /* bitsize */ |
| 1268 | FALSE, /* pc_relative */ |
| 1269 | 0, /* bitpos */ |
| 1270 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 1271 | bfd_elf_generic_reloc, /* special_function */ |
| 1272 | AARCH64_R_STR (JUMP_SLOT), /* name */ |
| 1273 | TRUE, /* partial_inplace */ |
| 1274 | 0xffffffff, /* src_mask */ |
| 1275 | 0xffffffff, /* dst_mask */ |
| 1276 | FALSE), /* pcrel_offset */ |
| 1277 | |
| 1278 | HOWTO (AARCH64_R (RELATIVE), /* type */ |
| 1279 | 0, /* rightshift */ |
| 1280 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1281 | 64, /* bitsize */ |
| 1282 | FALSE, /* pc_relative */ |
| 1283 | 0, /* bitpos */ |
| 1284 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 1285 | bfd_elf_generic_reloc, /* special_function */ |
| 1286 | AARCH64_R_STR (RELATIVE), /* name */ |
| 1287 | TRUE, /* partial_inplace */ |
| 1288 | ALL_ONES, /* src_mask */ |
| 1289 | ALL_ONES, /* dst_mask */ |
| 1290 | FALSE), /* pcrel_offset */ |
| 1291 | |
| 1292 | HOWTO (AARCH64_R (TLS_DTPMOD), /* type */ |
| 1293 | 0, /* rightshift */ |
| 1294 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1295 | 64, /* bitsize */ |
| 1296 | FALSE, /* pc_relative */ |
| 1297 | 0, /* bitpos */ |
| 1298 | complain_overflow_dont, /* complain_on_overflow */ |
| 1299 | bfd_elf_generic_reloc, /* special_function */ |
| 1300 | #if ARCH_SIZE == 64 |
| 1301 | AARCH64_R_STR (TLS_DTPMOD64), /* name */ |
| 1302 | #else |
| 1303 | AARCH64_R_STR (TLS_DTPMOD), /* name */ |
| 1304 | #endif |
| 1305 | FALSE, /* partial_inplace */ |
| 1306 | 0, /* src_mask */ |
| 1307 | ALL_ONES, /* dst_mask */ |
| 1308 | FALSE), /* pc_reloffset */ |
| 1309 | |
| 1310 | HOWTO (AARCH64_R (TLS_DTPREL), /* type */ |
| 1311 | 0, /* rightshift */ |
| 1312 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1313 | 64, /* bitsize */ |
| 1314 | FALSE, /* pc_relative */ |
| 1315 | 0, /* bitpos */ |
| 1316 | complain_overflow_dont, /* complain_on_overflow */ |
| 1317 | bfd_elf_generic_reloc, /* special_function */ |
| 1318 | #if ARCH_SIZE == 64 |
| 1319 | AARCH64_R_STR (TLS_DTPREL64), /* name */ |
| 1320 | #else |
| 1321 | AARCH64_R_STR (TLS_DTPREL), /* name */ |
| 1322 | #endif |
| 1323 | FALSE, /* partial_inplace */ |
| 1324 | 0, /* src_mask */ |
| 1325 | ALL_ONES, /* dst_mask */ |
| 1326 | FALSE), /* pcrel_offset */ |
| 1327 | |
| 1328 | HOWTO (AARCH64_R (TLS_TPREL), /* type */ |
| 1329 | 0, /* rightshift */ |
| 1330 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1331 | 64, /* bitsize */ |
| 1332 | FALSE, /* pc_relative */ |
| 1333 | 0, /* bitpos */ |
| 1334 | complain_overflow_dont, /* complain_on_overflow */ |
| 1335 | bfd_elf_generic_reloc, /* special_function */ |
| 1336 | #if ARCH_SIZE == 64 |
| 1337 | AARCH64_R_STR (TLS_TPREL64), /* name */ |
| 1338 | #else |
| 1339 | AARCH64_R_STR (TLS_TPREL), /* name */ |
| 1340 | #endif |
| 1341 | FALSE, /* partial_inplace */ |
| 1342 | 0, /* src_mask */ |
| 1343 | ALL_ONES, /* dst_mask */ |
| 1344 | FALSE), /* pcrel_offset */ |
| 1345 | |
| 1346 | HOWTO (AARCH64_R (TLSDESC), /* type */ |
| 1347 | 0, /* rightshift */ |
| 1348 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1349 | 64, /* bitsize */ |
| 1350 | FALSE, /* pc_relative */ |
| 1351 | 0, /* bitpos */ |
| 1352 | complain_overflow_dont, /* complain_on_overflow */ |
| 1353 | bfd_elf_generic_reloc, /* special_function */ |
| 1354 | AARCH64_R_STR (TLSDESC), /* name */ |
| 1355 | FALSE, /* partial_inplace */ |
| 1356 | 0, /* src_mask */ |
| 1357 | ALL_ONES, /* dst_mask */ |
| 1358 | FALSE), /* pcrel_offset */ |
| 1359 | |
| 1360 | HOWTO (AARCH64_R (IRELATIVE), /* type */ |
| 1361 | 0, /* rightshift */ |
| 1362 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1363 | 64, /* bitsize */ |
| 1364 | FALSE, /* pc_relative */ |
| 1365 | 0, /* bitpos */ |
| 1366 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 1367 | bfd_elf_generic_reloc, /* special_function */ |
| 1368 | AARCH64_R_STR (IRELATIVE), /* name */ |
| 1369 | FALSE, /* partial_inplace */ |
| 1370 | 0, /* src_mask */ |
| 1371 | ALL_ONES, /* dst_mask */ |
| 1372 | FALSE), /* pcrel_offset */ |
| 1373 | |
| 1374 | EMPTY_HOWTO (0), |
| 1375 | }; |
| 1376 | |
| 1377 | static reloc_howto_type elfNN_aarch64_howto_none = |
| 1378 | HOWTO (R_AARCH64_NONE, /* type */ |
| 1379 | 0, /* rightshift */ |
| 1380 | 3, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1381 | 0, /* bitsize */ |
| 1382 | FALSE, /* pc_relative */ |
| 1383 | 0, /* bitpos */ |
| 1384 | complain_overflow_dont,/* complain_on_overflow */ |
| 1385 | bfd_elf_generic_reloc, /* special_function */ |
| 1386 | "R_AARCH64_NONE", /* name */ |
| 1387 | FALSE, /* partial_inplace */ |
| 1388 | 0, /* src_mask */ |
| 1389 | 0, /* dst_mask */ |
| 1390 | FALSE); /* pcrel_offset */ |
| 1391 | |
| 1392 | /* Given HOWTO, return the bfd internal relocation enumerator. */ |
| 1393 | |
| 1394 | static bfd_reloc_code_real_type |
| 1395 | elfNN_aarch64_bfd_reloc_from_howto (reloc_howto_type *howto) |
| 1396 | { |
| 1397 | const int size |
| 1398 | = (int) ARRAY_SIZE (elfNN_aarch64_howto_table); |
| 1399 | const ptrdiff_t offset |
| 1400 | = howto - elfNN_aarch64_howto_table; |
| 1401 | |
| 1402 | if (offset > 0 && offset < size - 1) |
| 1403 | return BFD_RELOC_AARCH64_RELOC_START + offset; |
| 1404 | |
| 1405 | if (howto == &elfNN_aarch64_howto_none) |
| 1406 | return BFD_RELOC_AARCH64_NONE; |
| 1407 | |
| 1408 | return BFD_RELOC_AARCH64_RELOC_START; |
| 1409 | } |
| 1410 | |
| 1411 | /* Given R_TYPE, return the bfd internal relocation enumerator. */ |
| 1412 | |
| 1413 | static bfd_reloc_code_real_type |
| 1414 | elfNN_aarch64_bfd_reloc_from_type (unsigned int r_type) |
| 1415 | { |
| 1416 | static bfd_boolean initialized_p = FALSE; |
| 1417 | /* Indexed by R_TYPE, values are offsets in the howto_table. */ |
| 1418 | static unsigned int offsets[R_AARCH64_end]; |
| 1419 | |
| 1420 | if (initialized_p == FALSE) |
| 1421 | { |
| 1422 | unsigned int i; |
| 1423 | |
| 1424 | for (i = 1; i < ARRAY_SIZE (elfNN_aarch64_howto_table) - 1; ++i) |
| 1425 | if (elfNN_aarch64_howto_table[i].type != 0) |
| 1426 | offsets[elfNN_aarch64_howto_table[i].type] = i; |
| 1427 | |
| 1428 | initialized_p = TRUE; |
| 1429 | } |
| 1430 | |
| 1431 | if (r_type == R_AARCH64_NONE || r_type == R_AARCH64_NULL) |
| 1432 | return BFD_RELOC_AARCH64_NONE; |
| 1433 | |
| 1434 | /* PR 17512: file: b371e70a. */ |
| 1435 | if (r_type >= R_AARCH64_end) |
| 1436 | { |
| 1437 | _bfd_error_handler (_("Invalid AArch64 reloc number: %d"), r_type); |
| 1438 | bfd_set_error (bfd_error_bad_value); |
| 1439 | return BFD_RELOC_AARCH64_NONE; |
| 1440 | } |
| 1441 | |
| 1442 | return BFD_RELOC_AARCH64_RELOC_START + offsets[r_type]; |
| 1443 | } |
| 1444 | |
| 1445 | struct elf_aarch64_reloc_map |
| 1446 | { |
| 1447 | bfd_reloc_code_real_type from; |
| 1448 | bfd_reloc_code_real_type to; |
| 1449 | }; |
| 1450 | |
| 1451 | /* Map bfd generic reloc to AArch64-specific reloc. */ |
| 1452 | static const struct elf_aarch64_reloc_map elf_aarch64_reloc_map[] = |
| 1453 | { |
| 1454 | {BFD_RELOC_NONE, BFD_RELOC_AARCH64_NONE}, |
| 1455 | |
| 1456 | /* Basic data relocations. */ |
| 1457 | {BFD_RELOC_CTOR, BFD_RELOC_AARCH64_NN}, |
| 1458 | {BFD_RELOC_64, BFD_RELOC_AARCH64_64}, |
| 1459 | {BFD_RELOC_32, BFD_RELOC_AARCH64_32}, |
| 1460 | {BFD_RELOC_16, BFD_RELOC_AARCH64_16}, |
| 1461 | {BFD_RELOC_64_PCREL, BFD_RELOC_AARCH64_64_PCREL}, |
| 1462 | {BFD_RELOC_32_PCREL, BFD_RELOC_AARCH64_32_PCREL}, |
| 1463 | {BFD_RELOC_16_PCREL, BFD_RELOC_AARCH64_16_PCREL}, |
| 1464 | }; |
| 1465 | |
| 1466 | /* Given the bfd internal relocation enumerator in CODE, return the |
| 1467 | corresponding howto entry. */ |
| 1468 | |
| 1469 | static reloc_howto_type * |
| 1470 | elfNN_aarch64_howto_from_bfd_reloc (bfd_reloc_code_real_type code) |
| 1471 | { |
| 1472 | unsigned int i; |
| 1473 | |
| 1474 | /* Convert bfd generic reloc to AArch64-specific reloc. */ |
| 1475 | if (code < BFD_RELOC_AARCH64_RELOC_START |
| 1476 | || code > BFD_RELOC_AARCH64_RELOC_END) |
| 1477 | for (i = 0; i < ARRAY_SIZE (elf_aarch64_reloc_map); i++) |
| 1478 | if (elf_aarch64_reloc_map[i].from == code) |
| 1479 | { |
| 1480 | code = elf_aarch64_reloc_map[i].to; |
| 1481 | break; |
| 1482 | } |
| 1483 | |
| 1484 | if (code > BFD_RELOC_AARCH64_RELOC_START |
| 1485 | && code < BFD_RELOC_AARCH64_RELOC_END) |
| 1486 | if (elfNN_aarch64_howto_table[code - BFD_RELOC_AARCH64_RELOC_START].type) |
| 1487 | return &elfNN_aarch64_howto_table[code - BFD_RELOC_AARCH64_RELOC_START]; |
| 1488 | |
| 1489 | if (code == BFD_RELOC_AARCH64_NONE) |
| 1490 | return &elfNN_aarch64_howto_none; |
| 1491 | |
| 1492 | return NULL; |
| 1493 | } |
| 1494 | |
| 1495 | static reloc_howto_type * |
| 1496 | elfNN_aarch64_howto_from_type (unsigned int r_type) |
| 1497 | { |
| 1498 | bfd_reloc_code_real_type val; |
| 1499 | reloc_howto_type *howto; |
| 1500 | |
| 1501 | #if ARCH_SIZE == 32 |
| 1502 | if (r_type > 256) |
| 1503 | { |
| 1504 | bfd_set_error (bfd_error_bad_value); |
| 1505 | return NULL; |
| 1506 | } |
| 1507 | #endif |
| 1508 | |
| 1509 | if (r_type == R_AARCH64_NONE) |
| 1510 | return &elfNN_aarch64_howto_none; |
| 1511 | |
| 1512 | val = elfNN_aarch64_bfd_reloc_from_type (r_type); |
| 1513 | howto = elfNN_aarch64_howto_from_bfd_reloc (val); |
| 1514 | |
| 1515 | if (howto != NULL) |
| 1516 | return howto; |
| 1517 | |
| 1518 | bfd_set_error (bfd_error_bad_value); |
| 1519 | return NULL; |
| 1520 | } |
| 1521 | |
| 1522 | static void |
| 1523 | elfNN_aarch64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *bfd_reloc, |
| 1524 | Elf_Internal_Rela *elf_reloc) |
| 1525 | { |
| 1526 | unsigned int r_type; |
| 1527 | |
| 1528 | r_type = ELFNN_R_TYPE (elf_reloc->r_info); |
| 1529 | bfd_reloc->howto = elfNN_aarch64_howto_from_type (r_type); |
| 1530 | } |
| 1531 | |
| 1532 | static reloc_howto_type * |
| 1533 | elfNN_aarch64_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 1534 | bfd_reloc_code_real_type code) |
| 1535 | { |
| 1536 | reloc_howto_type *howto = elfNN_aarch64_howto_from_bfd_reloc (code); |
| 1537 | |
| 1538 | if (howto != NULL) |
| 1539 | return howto; |
| 1540 | |
| 1541 | bfd_set_error (bfd_error_bad_value); |
| 1542 | return NULL; |
| 1543 | } |
| 1544 | |
| 1545 | static reloc_howto_type * |
| 1546 | elfNN_aarch64_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 1547 | const char *r_name) |
| 1548 | { |
| 1549 | unsigned int i; |
| 1550 | |
| 1551 | for (i = 1; i < ARRAY_SIZE (elfNN_aarch64_howto_table) - 1; ++i) |
| 1552 | if (elfNN_aarch64_howto_table[i].name != NULL |
| 1553 | && strcasecmp (elfNN_aarch64_howto_table[i].name, r_name) == 0) |
| 1554 | return &elfNN_aarch64_howto_table[i]; |
| 1555 | |
| 1556 | return NULL; |
| 1557 | } |
| 1558 | |
| 1559 | #define TARGET_LITTLE_SYM aarch64_elfNN_le_vec |
| 1560 | #define TARGET_LITTLE_NAME "elfNN-littleaarch64" |
| 1561 | #define TARGET_BIG_SYM aarch64_elfNN_be_vec |
| 1562 | #define TARGET_BIG_NAME "elfNN-bigaarch64" |
| 1563 | |
| 1564 | /* The linker script knows the section names for placement. |
| 1565 | The entry_names are used to do simple name mangling on the stubs. |
| 1566 | Given a function name, and its type, the stub can be found. The |
| 1567 | name can be changed. The only requirement is the %s be present. */ |
| 1568 | #define STUB_ENTRY_NAME "__%s_veneer" |
| 1569 | |
| 1570 | /* The name of the dynamic interpreter. This is put in the .interp |
| 1571 | section. */ |
| 1572 | #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1" |
| 1573 | |
| 1574 | #define AARCH64_MAX_FWD_BRANCH_OFFSET \ |
| 1575 | (((1 << 25) - 1) << 2) |
| 1576 | #define AARCH64_MAX_BWD_BRANCH_OFFSET \ |
| 1577 | (-((1 << 25) << 2)) |
| 1578 | |
| 1579 | #define AARCH64_MAX_ADRP_IMM ((1 << 20) - 1) |
| 1580 | #define AARCH64_MIN_ADRP_IMM (-(1 << 20)) |
| 1581 | |
| 1582 | static int |
| 1583 | aarch64_valid_for_adrp_p (bfd_vma value, bfd_vma place) |
| 1584 | { |
| 1585 | bfd_signed_vma offset = (bfd_signed_vma) (PG (value) - PG (place)) >> 12; |
| 1586 | return offset <= AARCH64_MAX_ADRP_IMM && offset >= AARCH64_MIN_ADRP_IMM; |
| 1587 | } |
| 1588 | |
| 1589 | static int |
| 1590 | aarch64_valid_branch_p (bfd_vma value, bfd_vma place) |
| 1591 | { |
| 1592 | bfd_signed_vma offset = (bfd_signed_vma) (value - place); |
| 1593 | return (offset <= AARCH64_MAX_FWD_BRANCH_OFFSET |
| 1594 | && offset >= AARCH64_MAX_BWD_BRANCH_OFFSET); |
| 1595 | } |
| 1596 | |
| 1597 | static const uint32_t aarch64_adrp_branch_stub [] = |
| 1598 | { |
| 1599 | 0x90000010, /* adrp ip0, X */ |
| 1600 | /* R_AARCH64_ADR_HI21_PCREL(X) */ |
| 1601 | 0x91000210, /* add ip0, ip0, :lo12:X */ |
| 1602 | /* R_AARCH64_ADD_ABS_LO12_NC(X) */ |
| 1603 | 0xd61f0200, /* br ip0 */ |
| 1604 | }; |
| 1605 | |
| 1606 | static const uint32_t aarch64_long_branch_stub[] = |
| 1607 | { |
| 1608 | #if ARCH_SIZE == 64 |
| 1609 | 0x58000090, /* ldr ip0, 1f */ |
| 1610 | #else |
| 1611 | 0x18000090, /* ldr wip0, 1f */ |
| 1612 | #endif |
| 1613 | 0x10000011, /* adr ip1, #0 */ |
| 1614 | 0x8b110210, /* add ip0, ip0, ip1 */ |
| 1615 | 0xd61f0200, /* br ip0 */ |
| 1616 | 0x00000000, /* 1: .xword or .word |
| 1617 | R_AARCH64_PRELNN(X) + 12 |
| 1618 | */ |
| 1619 | 0x00000000, |
| 1620 | }; |
| 1621 | |
| 1622 | static const uint32_t aarch64_erratum_835769_stub[] = |
| 1623 | { |
| 1624 | 0x00000000, /* Placeholder for multiply accumulate. */ |
| 1625 | 0x14000000, /* b <label> */ |
| 1626 | }; |
| 1627 | |
| 1628 | /* Section name for stubs is the associated section name plus this |
| 1629 | string. */ |
| 1630 | #define STUB_SUFFIX ".stub" |
| 1631 | |
| 1632 | enum elf_aarch64_stub_type |
| 1633 | { |
| 1634 | aarch64_stub_none, |
| 1635 | aarch64_stub_adrp_branch, |
| 1636 | aarch64_stub_long_branch, |
| 1637 | aarch64_stub_erratum_835769_veneer, |
| 1638 | }; |
| 1639 | |
| 1640 | struct elf_aarch64_stub_hash_entry |
| 1641 | { |
| 1642 | /* Base hash table entry structure. */ |
| 1643 | struct bfd_hash_entry root; |
| 1644 | |
| 1645 | /* The stub section. */ |
| 1646 | asection *stub_sec; |
| 1647 | |
| 1648 | /* Offset within stub_sec of the beginning of this stub. */ |
| 1649 | bfd_vma stub_offset; |
| 1650 | |
| 1651 | /* Given the symbol's value and its section we can determine its final |
| 1652 | value when building the stubs (so the stub knows where to jump). */ |
| 1653 | bfd_vma target_value; |
| 1654 | asection *target_section; |
| 1655 | |
| 1656 | enum elf_aarch64_stub_type stub_type; |
| 1657 | |
| 1658 | /* The symbol table entry, if any, that this was derived from. */ |
| 1659 | struct elf_aarch64_link_hash_entry *h; |
| 1660 | |
| 1661 | /* Destination symbol type */ |
| 1662 | unsigned char st_type; |
| 1663 | |
| 1664 | /* Where this stub is being called from, or, in the case of combined |
| 1665 | stub sections, the first input section in the group. */ |
| 1666 | asection *id_sec; |
| 1667 | |
| 1668 | /* The name for the local symbol at the start of this stub. The |
| 1669 | stub name in the hash table has to be unique; this does not, so |
| 1670 | it can be friendlier. */ |
| 1671 | char *output_name; |
| 1672 | |
| 1673 | /* The instruction which caused this stub to be generated (only valid for |
| 1674 | erratum 835769 workaround stubs at present). */ |
| 1675 | uint32_t veneered_insn; |
| 1676 | }; |
| 1677 | |
| 1678 | /* Used to build a map of a section. This is required for mixed-endian |
| 1679 | code/data. */ |
| 1680 | |
| 1681 | typedef struct elf_elf_section_map |
| 1682 | { |
| 1683 | bfd_vma vma; |
| 1684 | char type; |
| 1685 | } |
| 1686 | elf_aarch64_section_map; |
| 1687 | |
| 1688 | |
| 1689 | typedef struct _aarch64_elf_section_data |
| 1690 | { |
| 1691 | struct bfd_elf_section_data elf; |
| 1692 | unsigned int mapcount; |
| 1693 | unsigned int mapsize; |
| 1694 | elf_aarch64_section_map *map; |
| 1695 | } |
| 1696 | _aarch64_elf_section_data; |
| 1697 | |
| 1698 | #define elf_aarch64_section_data(sec) \ |
| 1699 | ((_aarch64_elf_section_data *) elf_section_data (sec)) |
| 1700 | |
| 1701 | /* A fix-descriptor for erratum 835769. */ |
| 1702 | struct aarch64_erratum_835769_fix |
| 1703 | { |
| 1704 | bfd *input_bfd; |
| 1705 | asection *section; |
| 1706 | bfd_vma offset; |
| 1707 | uint32_t veneered_insn; |
| 1708 | char *stub_name; |
| 1709 | enum elf_aarch64_stub_type stub_type; |
| 1710 | }; |
| 1711 | |
| 1712 | /* The size of the thread control block which is defined to be two pointers. */ |
| 1713 | #define TCB_SIZE (ARCH_SIZE/8)*2 |
| 1714 | |
| 1715 | struct elf_aarch64_local_symbol |
| 1716 | { |
| 1717 | unsigned int got_type; |
| 1718 | bfd_signed_vma got_refcount; |
| 1719 | bfd_vma got_offset; |
| 1720 | |
| 1721 | /* Offset of the GOTPLT entry reserved for the TLS descriptor. The |
| 1722 | offset is from the end of the jump table and reserved entries |
| 1723 | within the PLTGOT. |
| 1724 | |
| 1725 | The magic value (bfd_vma) -1 indicates that an offset has not be |
| 1726 | allocated. */ |
| 1727 | bfd_vma tlsdesc_got_jump_table_offset; |
| 1728 | }; |
| 1729 | |
| 1730 | struct elf_aarch64_obj_tdata |
| 1731 | { |
| 1732 | struct elf_obj_tdata root; |
| 1733 | |
| 1734 | /* local symbol descriptors */ |
| 1735 | struct elf_aarch64_local_symbol *locals; |
| 1736 | |
| 1737 | /* Zero to warn when linking objects with incompatible enum sizes. */ |
| 1738 | int no_enum_size_warning; |
| 1739 | |
| 1740 | /* Zero to warn when linking objects with incompatible wchar_t sizes. */ |
| 1741 | int no_wchar_size_warning; |
| 1742 | }; |
| 1743 | |
| 1744 | #define elf_aarch64_tdata(bfd) \ |
| 1745 | ((struct elf_aarch64_obj_tdata *) (bfd)->tdata.any) |
| 1746 | |
| 1747 | #define elf_aarch64_locals(bfd) (elf_aarch64_tdata (bfd)->locals) |
| 1748 | |
| 1749 | #define is_aarch64_elf(bfd) \ |
| 1750 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ |
| 1751 | && elf_tdata (bfd) != NULL \ |
| 1752 | && elf_object_id (bfd) == AARCH64_ELF_DATA) |
| 1753 | |
| 1754 | static bfd_boolean |
| 1755 | elfNN_aarch64_mkobject (bfd *abfd) |
| 1756 | { |
| 1757 | return bfd_elf_allocate_object (abfd, sizeof (struct elf_aarch64_obj_tdata), |
| 1758 | AARCH64_ELF_DATA); |
| 1759 | } |
| 1760 | |
| 1761 | #define elf_aarch64_hash_entry(ent) \ |
| 1762 | ((struct elf_aarch64_link_hash_entry *)(ent)) |
| 1763 | |
| 1764 | #define GOT_UNKNOWN 0 |
| 1765 | #define GOT_NORMAL 1 |
| 1766 | #define GOT_TLS_GD 2 |
| 1767 | #define GOT_TLS_IE 4 |
| 1768 | #define GOT_TLSDESC_GD 8 |
| 1769 | |
| 1770 | #define GOT_TLS_GD_ANY_P(type) ((type & GOT_TLS_GD) || (type & GOT_TLSDESC_GD)) |
| 1771 | |
| 1772 | /* AArch64 ELF linker hash entry. */ |
| 1773 | struct elf_aarch64_link_hash_entry |
| 1774 | { |
| 1775 | struct elf_link_hash_entry root; |
| 1776 | |
| 1777 | /* Track dynamic relocs copied for this symbol. */ |
| 1778 | struct elf_dyn_relocs *dyn_relocs; |
| 1779 | |
| 1780 | /* Since PLT entries have variable size, we need to record the |
| 1781 | index into .got.plt instead of recomputing it from the PLT |
| 1782 | offset. */ |
| 1783 | bfd_signed_vma plt_got_offset; |
| 1784 | |
| 1785 | /* Bit mask representing the type of GOT entry(s) if any required by |
| 1786 | this symbol. */ |
| 1787 | unsigned int got_type; |
| 1788 | |
| 1789 | /* A pointer to the most recently used stub hash entry against this |
| 1790 | symbol. */ |
| 1791 | struct elf_aarch64_stub_hash_entry *stub_cache; |
| 1792 | |
| 1793 | /* Offset of the GOTPLT entry reserved for the TLS descriptor. The offset |
| 1794 | is from the end of the jump table and reserved entries within the PLTGOT. |
| 1795 | |
| 1796 | The magic value (bfd_vma) -1 indicates that an offset has not |
| 1797 | be allocated. */ |
| 1798 | bfd_vma tlsdesc_got_jump_table_offset; |
| 1799 | }; |
| 1800 | |
| 1801 | static unsigned int |
| 1802 | elfNN_aarch64_symbol_got_type (struct elf_link_hash_entry *h, |
| 1803 | bfd *abfd, |
| 1804 | unsigned long r_symndx) |
| 1805 | { |
| 1806 | if (h) |
| 1807 | return elf_aarch64_hash_entry (h)->got_type; |
| 1808 | |
| 1809 | if (! elf_aarch64_locals (abfd)) |
| 1810 | return GOT_UNKNOWN; |
| 1811 | |
| 1812 | return elf_aarch64_locals (abfd)[r_symndx].got_type; |
| 1813 | } |
| 1814 | |
| 1815 | /* Get the AArch64 elf linker hash table from a link_info structure. */ |
| 1816 | #define elf_aarch64_hash_table(info) \ |
| 1817 | ((struct elf_aarch64_link_hash_table *) ((info)->hash)) |
| 1818 | |
| 1819 | #define aarch64_stub_hash_lookup(table, string, create, copy) \ |
| 1820 | ((struct elf_aarch64_stub_hash_entry *) \ |
| 1821 | bfd_hash_lookup ((table), (string), (create), (copy))) |
| 1822 | |
| 1823 | /* AArch64 ELF linker hash table. */ |
| 1824 | struct elf_aarch64_link_hash_table |
| 1825 | { |
| 1826 | /* The main hash table. */ |
| 1827 | struct elf_link_hash_table root; |
| 1828 | |
| 1829 | /* Nonzero to force PIC branch veneers. */ |
| 1830 | int pic_veneer; |
| 1831 | |
| 1832 | /* Fix erratum 835769. */ |
| 1833 | int fix_erratum_835769; |
| 1834 | |
| 1835 | /* A table of fix locations for erratum 835769. This holds erratum |
| 1836 | fix locations between elfNN_aarch64_size_stubs() and |
| 1837 | elfNN_aarch64_write_section(). */ |
| 1838 | struct aarch64_erratum_835769_fix *aarch64_erratum_835769_fixes; |
| 1839 | unsigned int num_aarch64_erratum_835769_fixes; |
| 1840 | |
| 1841 | /* The number of bytes in the initial entry in the PLT. */ |
| 1842 | bfd_size_type plt_header_size; |
| 1843 | |
| 1844 | /* The number of bytes in the subsequent PLT etries. */ |
| 1845 | bfd_size_type plt_entry_size; |
| 1846 | |
| 1847 | /* Short-cuts to get to dynamic linker sections. */ |
| 1848 | asection *sdynbss; |
| 1849 | asection *srelbss; |
| 1850 | |
| 1851 | /* Small local sym cache. */ |
| 1852 | struct sym_cache sym_cache; |
| 1853 | |
| 1854 | /* For convenience in allocate_dynrelocs. */ |
| 1855 | bfd *obfd; |
| 1856 | |
| 1857 | /* The amount of space used by the reserved portion of the sgotplt |
| 1858 | section, plus whatever space is used by the jump slots. */ |
| 1859 | bfd_vma sgotplt_jump_table_size; |
| 1860 | |
| 1861 | /* The stub hash table. */ |
| 1862 | struct bfd_hash_table stub_hash_table; |
| 1863 | |
| 1864 | /* Linker stub bfd. */ |
| 1865 | bfd *stub_bfd; |
| 1866 | |
| 1867 | /* Linker call-backs. */ |
| 1868 | asection *(*add_stub_section) (const char *, asection *); |
| 1869 | void (*layout_sections_again) (void); |
| 1870 | |
| 1871 | /* Array to keep track of which stub sections have been created, and |
| 1872 | information on stub grouping. */ |
| 1873 | struct map_stub |
| 1874 | { |
| 1875 | /* This is the section to which stubs in the group will be |
| 1876 | attached. */ |
| 1877 | asection *link_sec; |
| 1878 | /* The stub section. */ |
| 1879 | asection *stub_sec; |
| 1880 | } *stub_group; |
| 1881 | |
| 1882 | /* Assorted information used by elfNN_aarch64_size_stubs. */ |
| 1883 | unsigned int bfd_count; |
| 1884 | int top_index; |
| 1885 | asection **input_list; |
| 1886 | |
| 1887 | /* The offset into splt of the PLT entry for the TLS descriptor |
| 1888 | resolver. Special values are 0, if not necessary (or not found |
| 1889 | to be necessary yet), and -1 if needed but not determined |
| 1890 | yet. */ |
| 1891 | bfd_vma tlsdesc_plt; |
| 1892 | |
| 1893 | /* The GOT offset for the lazy trampoline. Communicated to the |
| 1894 | loader via DT_TLSDESC_GOT. The magic value (bfd_vma) -1 |
| 1895 | indicates an offset is not allocated. */ |
| 1896 | bfd_vma dt_tlsdesc_got; |
| 1897 | |
| 1898 | /* Used by local STT_GNU_IFUNC symbols. */ |
| 1899 | htab_t loc_hash_table; |
| 1900 | void * loc_hash_memory; |
| 1901 | }; |
| 1902 | |
| 1903 | /* Create an entry in an AArch64 ELF linker hash table. */ |
| 1904 | |
| 1905 | static struct bfd_hash_entry * |
| 1906 | elfNN_aarch64_link_hash_newfunc (struct bfd_hash_entry *entry, |
| 1907 | struct bfd_hash_table *table, |
| 1908 | const char *string) |
| 1909 | { |
| 1910 | struct elf_aarch64_link_hash_entry *ret = |
| 1911 | (struct elf_aarch64_link_hash_entry *) entry; |
| 1912 | |
| 1913 | /* Allocate the structure if it has not already been allocated by a |
| 1914 | subclass. */ |
| 1915 | if (ret == NULL) |
| 1916 | ret = bfd_hash_allocate (table, |
| 1917 | sizeof (struct elf_aarch64_link_hash_entry)); |
| 1918 | if (ret == NULL) |
| 1919 | return (struct bfd_hash_entry *) ret; |
| 1920 | |
| 1921 | /* Call the allocation method of the superclass. */ |
| 1922 | ret = ((struct elf_aarch64_link_hash_entry *) |
| 1923 | _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, |
| 1924 | table, string)); |
| 1925 | if (ret != NULL) |
| 1926 | { |
| 1927 | ret->dyn_relocs = NULL; |
| 1928 | ret->got_type = GOT_UNKNOWN; |
| 1929 | ret->plt_got_offset = (bfd_vma) - 1; |
| 1930 | ret->stub_cache = NULL; |
| 1931 | ret->tlsdesc_got_jump_table_offset = (bfd_vma) - 1; |
| 1932 | } |
| 1933 | |
| 1934 | return (struct bfd_hash_entry *) ret; |
| 1935 | } |
| 1936 | |
| 1937 | /* Initialize an entry in the stub hash table. */ |
| 1938 | |
| 1939 | static struct bfd_hash_entry * |
| 1940 | stub_hash_newfunc (struct bfd_hash_entry *entry, |
| 1941 | struct bfd_hash_table *table, const char *string) |
| 1942 | { |
| 1943 | /* Allocate the structure if it has not already been allocated by a |
| 1944 | subclass. */ |
| 1945 | if (entry == NULL) |
| 1946 | { |
| 1947 | entry = bfd_hash_allocate (table, |
| 1948 | sizeof (struct |
| 1949 | elf_aarch64_stub_hash_entry)); |
| 1950 | if (entry == NULL) |
| 1951 | return entry; |
| 1952 | } |
| 1953 | |
| 1954 | /* Call the allocation method of the superclass. */ |
| 1955 | entry = bfd_hash_newfunc (entry, table, string); |
| 1956 | if (entry != NULL) |
| 1957 | { |
| 1958 | struct elf_aarch64_stub_hash_entry *eh; |
| 1959 | |
| 1960 | /* Initialize the local fields. */ |
| 1961 | eh = (struct elf_aarch64_stub_hash_entry *) entry; |
| 1962 | eh->stub_sec = NULL; |
| 1963 | eh->stub_offset = 0; |
| 1964 | eh->target_value = 0; |
| 1965 | eh->target_section = NULL; |
| 1966 | eh->stub_type = aarch64_stub_none; |
| 1967 | eh->h = NULL; |
| 1968 | eh->id_sec = NULL; |
| 1969 | } |
| 1970 | |
| 1971 | return entry; |
| 1972 | } |
| 1973 | |
| 1974 | /* Compute a hash of a local hash entry. We use elf_link_hash_entry |
| 1975 | for local symbol so that we can handle local STT_GNU_IFUNC symbols |
| 1976 | as global symbol. We reuse indx and dynstr_index for local symbol |
| 1977 | hash since they aren't used by global symbols in this backend. */ |
| 1978 | |
| 1979 | static hashval_t |
| 1980 | elfNN_aarch64_local_htab_hash (const void *ptr) |
| 1981 | { |
| 1982 | struct elf_link_hash_entry *h |
| 1983 | = (struct elf_link_hash_entry *) ptr; |
| 1984 | return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index); |
| 1985 | } |
| 1986 | |
| 1987 | /* Compare local hash entries. */ |
| 1988 | |
| 1989 | static int |
| 1990 | elfNN_aarch64_local_htab_eq (const void *ptr1, const void *ptr2) |
| 1991 | { |
| 1992 | struct elf_link_hash_entry *h1 |
| 1993 | = (struct elf_link_hash_entry *) ptr1; |
| 1994 | struct elf_link_hash_entry *h2 |
| 1995 | = (struct elf_link_hash_entry *) ptr2; |
| 1996 | |
| 1997 | return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index; |
| 1998 | } |
| 1999 | |
| 2000 | /* Find and/or create a hash entry for local symbol. */ |
| 2001 | |
| 2002 | static struct elf_link_hash_entry * |
| 2003 | elfNN_aarch64_get_local_sym_hash (struct elf_aarch64_link_hash_table *htab, |
| 2004 | bfd *abfd, const Elf_Internal_Rela *rel, |
| 2005 | bfd_boolean create) |
| 2006 | { |
| 2007 | struct elf_aarch64_link_hash_entry e, *ret; |
| 2008 | asection *sec = abfd->sections; |
| 2009 | hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id, |
| 2010 | ELFNN_R_SYM (rel->r_info)); |
| 2011 | void **slot; |
| 2012 | |
| 2013 | e.root.indx = sec->id; |
| 2014 | e.root.dynstr_index = ELFNN_R_SYM (rel->r_info); |
| 2015 | slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h, |
| 2016 | create ? INSERT : NO_INSERT); |
| 2017 | |
| 2018 | if (!slot) |
| 2019 | return NULL; |
| 2020 | |
| 2021 | if (*slot) |
| 2022 | { |
| 2023 | ret = (struct elf_aarch64_link_hash_entry *) *slot; |
| 2024 | return &ret->root; |
| 2025 | } |
| 2026 | |
| 2027 | ret = (struct elf_aarch64_link_hash_entry *) |
| 2028 | objalloc_alloc ((struct objalloc *) htab->loc_hash_memory, |
| 2029 | sizeof (struct elf_aarch64_link_hash_entry)); |
| 2030 | if (ret) |
| 2031 | { |
| 2032 | memset (ret, 0, sizeof (*ret)); |
| 2033 | ret->root.indx = sec->id; |
| 2034 | ret->root.dynstr_index = ELFNN_R_SYM (rel->r_info); |
| 2035 | ret->root.dynindx = -1; |
| 2036 | *slot = ret; |
| 2037 | } |
| 2038 | return &ret->root; |
| 2039 | } |
| 2040 | |
| 2041 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
| 2042 | |
| 2043 | static void |
| 2044 | elfNN_aarch64_copy_indirect_symbol (struct bfd_link_info *info, |
| 2045 | struct elf_link_hash_entry *dir, |
| 2046 | struct elf_link_hash_entry *ind) |
| 2047 | { |
| 2048 | struct elf_aarch64_link_hash_entry *edir, *eind; |
| 2049 | |
| 2050 | edir = (struct elf_aarch64_link_hash_entry *) dir; |
| 2051 | eind = (struct elf_aarch64_link_hash_entry *) ind; |
| 2052 | |
| 2053 | if (eind->dyn_relocs != NULL) |
| 2054 | { |
| 2055 | if (edir->dyn_relocs != NULL) |
| 2056 | { |
| 2057 | struct elf_dyn_relocs **pp; |
| 2058 | struct elf_dyn_relocs *p; |
| 2059 | |
| 2060 | /* Add reloc counts against the indirect sym to the direct sym |
| 2061 | list. Merge any entries against the same section. */ |
| 2062 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL;) |
| 2063 | { |
| 2064 | struct elf_dyn_relocs *q; |
| 2065 | |
| 2066 | for (q = edir->dyn_relocs; q != NULL; q = q->next) |
| 2067 | if (q->sec == p->sec) |
| 2068 | { |
| 2069 | q->pc_count += p->pc_count; |
| 2070 | q->count += p->count; |
| 2071 | *pp = p->next; |
| 2072 | break; |
| 2073 | } |
| 2074 | if (q == NULL) |
| 2075 | pp = &p->next; |
| 2076 | } |
| 2077 | *pp = edir->dyn_relocs; |
| 2078 | } |
| 2079 | |
| 2080 | edir->dyn_relocs = eind->dyn_relocs; |
| 2081 | eind->dyn_relocs = NULL; |
| 2082 | } |
| 2083 | |
| 2084 | if (ind->root.type == bfd_link_hash_indirect) |
| 2085 | { |
| 2086 | /* Copy over PLT info. */ |
| 2087 | if (dir->got.refcount <= 0) |
| 2088 | { |
| 2089 | edir->got_type = eind->got_type; |
| 2090 | eind->got_type = GOT_UNKNOWN; |
| 2091 | } |
| 2092 | } |
| 2093 | |
| 2094 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); |
| 2095 | } |
| 2096 | |
| 2097 | /* Destroy an AArch64 elf linker hash table. */ |
| 2098 | |
| 2099 | static void |
| 2100 | elfNN_aarch64_link_hash_table_free (bfd *obfd) |
| 2101 | { |
| 2102 | struct elf_aarch64_link_hash_table *ret |
| 2103 | = (struct elf_aarch64_link_hash_table *) obfd->link.hash; |
| 2104 | |
| 2105 | if (ret->loc_hash_table) |
| 2106 | htab_delete (ret->loc_hash_table); |
| 2107 | if (ret->loc_hash_memory) |
| 2108 | objalloc_free ((struct objalloc *) ret->loc_hash_memory); |
| 2109 | |
| 2110 | bfd_hash_table_free (&ret->stub_hash_table); |
| 2111 | _bfd_elf_link_hash_table_free (obfd); |
| 2112 | } |
| 2113 | |
| 2114 | /* Create an AArch64 elf linker hash table. */ |
| 2115 | |
| 2116 | static struct bfd_link_hash_table * |
| 2117 | elfNN_aarch64_link_hash_table_create (bfd *abfd) |
| 2118 | { |
| 2119 | struct elf_aarch64_link_hash_table *ret; |
| 2120 | bfd_size_type amt = sizeof (struct elf_aarch64_link_hash_table); |
| 2121 | |
| 2122 | ret = bfd_zmalloc (amt); |
| 2123 | if (ret == NULL) |
| 2124 | return NULL; |
| 2125 | |
| 2126 | if (!_bfd_elf_link_hash_table_init |
| 2127 | (&ret->root, abfd, elfNN_aarch64_link_hash_newfunc, |
| 2128 | sizeof (struct elf_aarch64_link_hash_entry), AARCH64_ELF_DATA)) |
| 2129 | { |
| 2130 | free (ret); |
| 2131 | return NULL; |
| 2132 | } |
| 2133 | |
| 2134 | ret->plt_header_size = PLT_ENTRY_SIZE; |
| 2135 | ret->plt_entry_size = PLT_SMALL_ENTRY_SIZE; |
| 2136 | ret->obfd = abfd; |
| 2137 | ret->dt_tlsdesc_got = (bfd_vma) - 1; |
| 2138 | |
| 2139 | if (!bfd_hash_table_init (&ret->stub_hash_table, stub_hash_newfunc, |
| 2140 | sizeof (struct elf_aarch64_stub_hash_entry))) |
| 2141 | { |
| 2142 | _bfd_elf_link_hash_table_free (abfd); |
| 2143 | return NULL; |
| 2144 | } |
| 2145 | |
| 2146 | ret->loc_hash_table = htab_try_create (1024, |
| 2147 | elfNN_aarch64_local_htab_hash, |
| 2148 | elfNN_aarch64_local_htab_eq, |
| 2149 | NULL); |
| 2150 | ret->loc_hash_memory = objalloc_create (); |
| 2151 | if (!ret->loc_hash_table || !ret->loc_hash_memory) |
| 2152 | { |
| 2153 | elfNN_aarch64_link_hash_table_free (abfd); |
| 2154 | return NULL; |
| 2155 | } |
| 2156 | ret->root.root.hash_table_free = elfNN_aarch64_link_hash_table_free; |
| 2157 | |
| 2158 | return &ret->root.root; |
| 2159 | } |
| 2160 | |
| 2161 | static bfd_boolean |
| 2162 | aarch64_relocate (unsigned int r_type, bfd *input_bfd, asection *input_section, |
| 2163 | bfd_vma offset, bfd_vma value) |
| 2164 | { |
| 2165 | reloc_howto_type *howto; |
| 2166 | bfd_vma place; |
| 2167 | |
| 2168 | howto = elfNN_aarch64_howto_from_type (r_type); |
| 2169 | place = (input_section->output_section->vma + input_section->output_offset |
| 2170 | + offset); |
| 2171 | |
| 2172 | r_type = elfNN_aarch64_bfd_reloc_from_type (r_type); |
| 2173 | value = _bfd_aarch64_elf_resolve_relocation (r_type, place, value, 0, FALSE); |
| 2174 | return _bfd_aarch64_elf_put_addend (input_bfd, |
| 2175 | input_section->contents + offset, r_type, |
| 2176 | howto, value); |
| 2177 | } |
| 2178 | |
| 2179 | static enum elf_aarch64_stub_type |
| 2180 | aarch64_select_branch_stub (bfd_vma value, bfd_vma place) |
| 2181 | { |
| 2182 | if (aarch64_valid_for_adrp_p (value, place)) |
| 2183 | return aarch64_stub_adrp_branch; |
| 2184 | return aarch64_stub_long_branch; |
| 2185 | } |
| 2186 | |
| 2187 | /* Determine the type of stub needed, if any, for a call. */ |
| 2188 | |
| 2189 | static enum elf_aarch64_stub_type |
| 2190 | aarch64_type_of_stub (struct bfd_link_info *info, |
| 2191 | asection *input_sec, |
| 2192 | const Elf_Internal_Rela *rel, |
| 2193 | unsigned char st_type, |
| 2194 | struct elf_aarch64_link_hash_entry *hash, |
| 2195 | bfd_vma destination) |
| 2196 | { |
| 2197 | bfd_vma location; |
| 2198 | bfd_signed_vma branch_offset; |
| 2199 | unsigned int r_type; |
| 2200 | struct elf_aarch64_link_hash_table *globals; |
| 2201 | enum elf_aarch64_stub_type stub_type = aarch64_stub_none; |
| 2202 | bfd_boolean via_plt_p; |
| 2203 | |
| 2204 | if (st_type != STT_FUNC) |
| 2205 | return stub_type; |
| 2206 | |
| 2207 | globals = elf_aarch64_hash_table (info); |
| 2208 | via_plt_p = (globals->root.splt != NULL && hash != NULL |
| 2209 | && hash->root.plt.offset != (bfd_vma) - 1); |
| 2210 | |
| 2211 | if (via_plt_p) |
| 2212 | return stub_type; |
| 2213 | |
| 2214 | /* Determine where the call point is. */ |
| 2215 | location = (input_sec->output_offset |
| 2216 | + input_sec->output_section->vma + rel->r_offset); |
| 2217 | |
| 2218 | branch_offset = (bfd_signed_vma) (destination - location); |
| 2219 | |
| 2220 | r_type = ELFNN_R_TYPE (rel->r_info); |
| 2221 | |
| 2222 | /* We don't want to redirect any old unconditional jump in this way, |
| 2223 | only one which is being used for a sibcall, where it is |
| 2224 | acceptable for the IP0 and IP1 registers to be clobbered. */ |
| 2225 | if ((r_type == AARCH64_R (CALL26) || r_type == AARCH64_R (JUMP26)) |
| 2226 | && (branch_offset > AARCH64_MAX_FWD_BRANCH_OFFSET |
| 2227 | || branch_offset < AARCH64_MAX_BWD_BRANCH_OFFSET)) |
| 2228 | { |
| 2229 | stub_type = aarch64_stub_long_branch; |
| 2230 | } |
| 2231 | |
| 2232 | return stub_type; |
| 2233 | } |
| 2234 | |
| 2235 | /* Build a name for an entry in the stub hash table. */ |
| 2236 | |
| 2237 | static char * |
| 2238 | elfNN_aarch64_stub_name (const asection *input_section, |
| 2239 | const asection *sym_sec, |
| 2240 | const struct elf_aarch64_link_hash_entry *hash, |
| 2241 | const Elf_Internal_Rela *rel) |
| 2242 | { |
| 2243 | char *stub_name; |
| 2244 | bfd_size_type len; |
| 2245 | |
| 2246 | if (hash) |
| 2247 | { |
| 2248 | len = 8 + 1 + strlen (hash->root.root.root.string) + 1 + 16 + 1; |
| 2249 | stub_name = bfd_malloc (len); |
| 2250 | if (stub_name != NULL) |
| 2251 | snprintf (stub_name, len, "%08x_%s+%" BFD_VMA_FMT "x", |
| 2252 | (unsigned int) input_section->id, |
| 2253 | hash->root.root.root.string, |
| 2254 | rel->r_addend); |
| 2255 | } |
| 2256 | else |
| 2257 | { |
| 2258 | len = 8 + 1 + 8 + 1 + 8 + 1 + 16 + 1; |
| 2259 | stub_name = bfd_malloc (len); |
| 2260 | if (stub_name != NULL) |
| 2261 | snprintf (stub_name, len, "%08x_%x:%x+%" BFD_VMA_FMT "x", |
| 2262 | (unsigned int) input_section->id, |
| 2263 | (unsigned int) sym_sec->id, |
| 2264 | (unsigned int) ELFNN_R_SYM (rel->r_info), |
| 2265 | rel->r_addend); |
| 2266 | } |
| 2267 | |
| 2268 | return stub_name; |
| 2269 | } |
| 2270 | |
| 2271 | /* Look up an entry in the stub hash. Stub entries are cached because |
| 2272 | creating the stub name takes a bit of time. */ |
| 2273 | |
| 2274 | static struct elf_aarch64_stub_hash_entry * |
| 2275 | elfNN_aarch64_get_stub_entry (const asection *input_section, |
| 2276 | const asection *sym_sec, |
| 2277 | struct elf_link_hash_entry *hash, |
| 2278 | const Elf_Internal_Rela *rel, |
| 2279 | struct elf_aarch64_link_hash_table *htab) |
| 2280 | { |
| 2281 | struct elf_aarch64_stub_hash_entry *stub_entry; |
| 2282 | struct elf_aarch64_link_hash_entry *h = |
| 2283 | (struct elf_aarch64_link_hash_entry *) hash; |
| 2284 | const asection *id_sec; |
| 2285 | |
| 2286 | if ((input_section->flags & SEC_CODE) == 0) |
| 2287 | return NULL; |
| 2288 | |
| 2289 | /* If this input section is part of a group of sections sharing one |
| 2290 | stub section, then use the id of the first section in the group. |
| 2291 | Stub names need to include a section id, as there may well be |
| 2292 | more than one stub used to reach say, printf, and we need to |
| 2293 | distinguish between them. */ |
| 2294 | id_sec = htab->stub_group[input_section->id].link_sec; |
| 2295 | |
| 2296 | if (h != NULL && h->stub_cache != NULL |
| 2297 | && h->stub_cache->h == h && h->stub_cache->id_sec == id_sec) |
| 2298 | { |
| 2299 | stub_entry = h->stub_cache; |
| 2300 | } |
| 2301 | else |
| 2302 | { |
| 2303 | char *stub_name; |
| 2304 | |
| 2305 | stub_name = elfNN_aarch64_stub_name (id_sec, sym_sec, h, rel); |
| 2306 | if (stub_name == NULL) |
| 2307 | return NULL; |
| 2308 | |
| 2309 | stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table, |
| 2310 | stub_name, FALSE, FALSE); |
| 2311 | if (h != NULL) |
| 2312 | h->stub_cache = stub_entry; |
| 2313 | |
| 2314 | free (stub_name); |
| 2315 | } |
| 2316 | |
| 2317 | return stub_entry; |
| 2318 | } |
| 2319 | |
| 2320 | /* Add a new stub entry to the stub hash. Not all fields of the new |
| 2321 | stub entry are initialised. */ |
| 2322 | |
| 2323 | static struct elf_aarch64_stub_hash_entry * |
| 2324 | elfNN_aarch64_add_stub (const char *stub_name, |
| 2325 | asection *section, |
| 2326 | struct elf_aarch64_link_hash_table *htab) |
| 2327 | { |
| 2328 | asection *link_sec; |
| 2329 | asection *stub_sec; |
| 2330 | struct elf_aarch64_stub_hash_entry *stub_entry; |
| 2331 | |
| 2332 | link_sec = htab->stub_group[section->id].link_sec; |
| 2333 | stub_sec = htab->stub_group[section->id].stub_sec; |
| 2334 | if (stub_sec == NULL) |
| 2335 | { |
| 2336 | stub_sec = htab->stub_group[link_sec->id].stub_sec; |
| 2337 | if (stub_sec == NULL) |
| 2338 | { |
| 2339 | size_t namelen; |
| 2340 | bfd_size_type len; |
| 2341 | char *s_name; |
| 2342 | |
| 2343 | namelen = strlen (link_sec->name); |
| 2344 | len = namelen + sizeof (STUB_SUFFIX); |
| 2345 | s_name = bfd_alloc (htab->stub_bfd, len); |
| 2346 | if (s_name == NULL) |
| 2347 | return NULL; |
| 2348 | |
| 2349 | memcpy (s_name, link_sec->name, namelen); |
| 2350 | memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX)); |
| 2351 | stub_sec = (*htab->add_stub_section) (s_name, link_sec); |
| 2352 | if (stub_sec == NULL) |
| 2353 | return NULL; |
| 2354 | htab->stub_group[link_sec->id].stub_sec = stub_sec; |
| 2355 | } |
| 2356 | htab->stub_group[section->id].stub_sec = stub_sec; |
| 2357 | } |
| 2358 | |
| 2359 | /* Enter this entry into the linker stub hash table. */ |
| 2360 | stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table, stub_name, |
| 2361 | TRUE, FALSE); |
| 2362 | if (stub_entry == NULL) |
| 2363 | { |
| 2364 | (*_bfd_error_handler) (_("%s: cannot create stub entry %s"), |
| 2365 | section->owner, stub_name); |
| 2366 | return NULL; |
| 2367 | } |
| 2368 | |
| 2369 | stub_entry->stub_sec = stub_sec; |
| 2370 | stub_entry->stub_offset = 0; |
| 2371 | stub_entry->id_sec = link_sec; |
| 2372 | |
| 2373 | return stub_entry; |
| 2374 | } |
| 2375 | |
| 2376 | static bfd_boolean |
| 2377 | aarch64_build_one_stub (struct bfd_hash_entry *gen_entry, |
| 2378 | void *in_arg ATTRIBUTE_UNUSED) |
| 2379 | { |
| 2380 | struct elf_aarch64_stub_hash_entry *stub_entry; |
| 2381 | asection *stub_sec; |
| 2382 | bfd *stub_bfd; |
| 2383 | bfd_byte *loc; |
| 2384 | bfd_vma sym_value; |
| 2385 | bfd_vma veneered_insn_loc; |
| 2386 | bfd_vma veneer_entry_loc; |
| 2387 | bfd_signed_vma branch_offset = 0; |
| 2388 | unsigned int template_size; |
| 2389 | const uint32_t *template; |
| 2390 | unsigned int i; |
| 2391 | |
| 2392 | /* Massage our args to the form they really have. */ |
| 2393 | stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry; |
| 2394 | |
| 2395 | stub_sec = stub_entry->stub_sec; |
| 2396 | |
| 2397 | /* Make a note of the offset within the stubs for this entry. */ |
| 2398 | stub_entry->stub_offset = stub_sec->size; |
| 2399 | loc = stub_sec->contents + stub_entry->stub_offset; |
| 2400 | |
| 2401 | stub_bfd = stub_sec->owner; |
| 2402 | |
| 2403 | /* This is the address of the stub destination. */ |
| 2404 | sym_value = (stub_entry->target_value |
| 2405 | + stub_entry->target_section->output_offset |
| 2406 | + stub_entry->target_section->output_section->vma); |
| 2407 | |
| 2408 | if (stub_entry->stub_type == aarch64_stub_long_branch) |
| 2409 | { |
| 2410 | bfd_vma place = (stub_entry->stub_offset + stub_sec->output_section->vma |
| 2411 | + stub_sec->output_offset); |
| 2412 | |
| 2413 | /* See if we can relax the stub. */ |
| 2414 | if (aarch64_valid_for_adrp_p (sym_value, place)) |
| 2415 | stub_entry->stub_type = aarch64_select_branch_stub (sym_value, place); |
| 2416 | } |
| 2417 | |
| 2418 | switch (stub_entry->stub_type) |
| 2419 | { |
| 2420 | case aarch64_stub_adrp_branch: |
| 2421 | template = aarch64_adrp_branch_stub; |
| 2422 | template_size = sizeof (aarch64_adrp_branch_stub); |
| 2423 | break; |
| 2424 | case aarch64_stub_long_branch: |
| 2425 | template = aarch64_long_branch_stub; |
| 2426 | template_size = sizeof (aarch64_long_branch_stub); |
| 2427 | break; |
| 2428 | case aarch64_stub_erratum_835769_veneer: |
| 2429 | template = aarch64_erratum_835769_stub; |
| 2430 | template_size = sizeof (aarch64_erratum_835769_stub); |
| 2431 | break; |
| 2432 | default: |
| 2433 | BFD_FAIL (); |
| 2434 | return FALSE; |
| 2435 | } |
| 2436 | |
| 2437 | for (i = 0; i < (template_size / sizeof template[0]); i++) |
| 2438 | { |
| 2439 | bfd_putl32 (template[i], loc); |
| 2440 | loc += 4; |
| 2441 | } |
| 2442 | |
| 2443 | template_size = (template_size + 7) & ~7; |
| 2444 | stub_sec->size += template_size; |
| 2445 | |
| 2446 | switch (stub_entry->stub_type) |
| 2447 | { |
| 2448 | case aarch64_stub_adrp_branch: |
| 2449 | if (aarch64_relocate (AARCH64_R (ADR_PREL_PG_HI21), stub_bfd, stub_sec, |
| 2450 | stub_entry->stub_offset, sym_value)) |
| 2451 | /* The stub would not have been relaxed if the offset was out |
| 2452 | of range. */ |
| 2453 | BFD_FAIL (); |
| 2454 | |
| 2455 | _bfd_final_link_relocate |
| 2456 | (elfNN_aarch64_howto_from_type (AARCH64_R (ADD_ABS_LO12_NC)), |
| 2457 | stub_bfd, |
| 2458 | stub_sec, |
| 2459 | stub_sec->contents, |
| 2460 | stub_entry->stub_offset + 4, |
| 2461 | sym_value, |
| 2462 | 0); |
| 2463 | break; |
| 2464 | |
| 2465 | case aarch64_stub_long_branch: |
| 2466 | /* We want the value relative to the address 12 bytes back from the |
| 2467 | value itself. */ |
| 2468 | _bfd_final_link_relocate (elfNN_aarch64_howto_from_type |
| 2469 | (AARCH64_R (PRELNN)), stub_bfd, stub_sec, |
| 2470 | stub_sec->contents, |
| 2471 | stub_entry->stub_offset + 16, |
| 2472 | sym_value + 12, 0); |
| 2473 | break; |
| 2474 | |
| 2475 | case aarch64_stub_erratum_835769_veneer: |
| 2476 | veneered_insn_loc = stub_entry->target_section->output_section->vma |
| 2477 | + stub_entry->target_section->output_offset |
| 2478 | + stub_entry->target_value; |
| 2479 | veneer_entry_loc = stub_entry->stub_sec->output_section->vma |
| 2480 | + stub_entry->stub_sec->output_offset |
| 2481 | + stub_entry->stub_offset; |
| 2482 | branch_offset = veneered_insn_loc - veneer_entry_loc; |
| 2483 | branch_offset >>= 2; |
| 2484 | branch_offset &= 0x3ffffff; |
| 2485 | bfd_putl32 (stub_entry->veneered_insn, |
| 2486 | stub_sec->contents + stub_entry->stub_offset); |
| 2487 | bfd_putl32 (template[1] | branch_offset, |
| 2488 | stub_sec->contents + stub_entry->stub_offset + 4); |
| 2489 | break; |
| 2490 | |
| 2491 | default: |
| 2492 | break; |
| 2493 | } |
| 2494 | |
| 2495 | return TRUE; |
| 2496 | } |
| 2497 | |
| 2498 | /* As above, but don't actually build the stub. Just bump offset so |
| 2499 | we know stub section sizes. */ |
| 2500 | |
| 2501 | static bfd_boolean |
| 2502 | aarch64_size_one_stub (struct bfd_hash_entry *gen_entry, |
| 2503 | void *in_arg ATTRIBUTE_UNUSED) |
| 2504 | { |
| 2505 | struct elf_aarch64_stub_hash_entry *stub_entry; |
| 2506 | int size; |
| 2507 | |
| 2508 | /* Massage our args to the form they really have. */ |
| 2509 | stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry; |
| 2510 | |
| 2511 | switch (stub_entry->stub_type) |
| 2512 | { |
| 2513 | case aarch64_stub_adrp_branch: |
| 2514 | size = sizeof (aarch64_adrp_branch_stub); |
| 2515 | break; |
| 2516 | case aarch64_stub_long_branch: |
| 2517 | size = sizeof (aarch64_long_branch_stub); |
| 2518 | break; |
| 2519 | case aarch64_stub_erratum_835769_veneer: |
| 2520 | size = sizeof (aarch64_erratum_835769_stub); |
| 2521 | break; |
| 2522 | default: |
| 2523 | BFD_FAIL (); |
| 2524 | return FALSE; |
| 2525 | break; |
| 2526 | } |
| 2527 | |
| 2528 | size = (size + 7) & ~7; |
| 2529 | stub_entry->stub_sec->size += size; |
| 2530 | return TRUE; |
| 2531 | } |
| 2532 | |
| 2533 | /* External entry points for sizing and building linker stubs. */ |
| 2534 | |
| 2535 | /* Set up various things so that we can make a list of input sections |
| 2536 | for each output section included in the link. Returns -1 on error, |
| 2537 | 0 when no stubs will be needed, and 1 on success. */ |
| 2538 | |
| 2539 | int |
| 2540 | elfNN_aarch64_setup_section_lists (bfd *output_bfd, |
| 2541 | struct bfd_link_info *info) |
| 2542 | { |
| 2543 | bfd *input_bfd; |
| 2544 | unsigned int bfd_count; |
| 2545 | int top_id, top_index; |
| 2546 | asection *section; |
| 2547 | asection **input_list, **list; |
| 2548 | bfd_size_type amt; |
| 2549 | struct elf_aarch64_link_hash_table *htab = |
| 2550 | elf_aarch64_hash_table (info); |
| 2551 | |
| 2552 | if (!is_elf_hash_table (htab)) |
| 2553 | return 0; |
| 2554 | |
| 2555 | /* Count the number of input BFDs and find the top input section id. */ |
| 2556 | for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0; |
| 2557 | input_bfd != NULL; input_bfd = input_bfd->link.next) |
| 2558 | { |
| 2559 | bfd_count += 1; |
| 2560 | for (section = input_bfd->sections; |
| 2561 | section != NULL; section = section->next) |
| 2562 | { |
| 2563 | if (top_id < section->id) |
| 2564 | top_id = section->id; |
| 2565 | } |
| 2566 | } |
| 2567 | htab->bfd_count = bfd_count; |
| 2568 | |
| 2569 | amt = sizeof (struct map_stub) * (top_id + 1); |
| 2570 | htab->stub_group = bfd_zmalloc (amt); |
| 2571 | if (htab->stub_group == NULL) |
| 2572 | return -1; |
| 2573 | |
| 2574 | /* We can't use output_bfd->section_count here to find the top output |
| 2575 | section index as some sections may have been removed, and |
| 2576 | _bfd_strip_section_from_output doesn't renumber the indices. */ |
| 2577 | for (section = output_bfd->sections, top_index = 0; |
| 2578 | section != NULL; section = section->next) |
| 2579 | { |
| 2580 | if (top_index < section->index) |
| 2581 | top_index = section->index; |
| 2582 | } |
| 2583 | |
| 2584 | htab->top_index = top_index; |
| 2585 | amt = sizeof (asection *) * (top_index + 1); |
| 2586 | input_list = bfd_malloc (amt); |
| 2587 | htab->input_list = input_list; |
| 2588 | if (input_list == NULL) |
| 2589 | return -1; |
| 2590 | |
| 2591 | /* For sections we aren't interested in, mark their entries with a |
| 2592 | value we can check later. */ |
| 2593 | list = input_list + top_index; |
| 2594 | do |
| 2595 | *list = bfd_abs_section_ptr; |
| 2596 | while (list-- != input_list); |
| 2597 | |
| 2598 | for (section = output_bfd->sections; |
| 2599 | section != NULL; section = section->next) |
| 2600 | { |
| 2601 | if ((section->flags & SEC_CODE) != 0) |
| 2602 | input_list[section->index] = NULL; |
| 2603 | } |
| 2604 | |
| 2605 | return 1; |
| 2606 | } |
| 2607 | |
| 2608 | /* Used by elfNN_aarch64_next_input_section and group_sections. */ |
| 2609 | #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec) |
| 2610 | |
| 2611 | /* The linker repeatedly calls this function for each input section, |
| 2612 | in the order that input sections are linked into output sections. |
| 2613 | Build lists of input sections to determine groupings between which |
| 2614 | we may insert linker stubs. */ |
| 2615 | |
| 2616 | void |
| 2617 | elfNN_aarch64_next_input_section (struct bfd_link_info *info, asection *isec) |
| 2618 | { |
| 2619 | struct elf_aarch64_link_hash_table *htab = |
| 2620 | elf_aarch64_hash_table (info); |
| 2621 | |
| 2622 | if (isec->output_section->index <= htab->top_index) |
| 2623 | { |
| 2624 | asection **list = htab->input_list + isec->output_section->index; |
| 2625 | |
| 2626 | if (*list != bfd_abs_section_ptr) |
| 2627 | { |
| 2628 | /* Steal the link_sec pointer for our list. */ |
| 2629 | /* This happens to make the list in reverse order, |
| 2630 | which is what we want. */ |
| 2631 | PREV_SEC (isec) = *list; |
| 2632 | *list = isec; |
| 2633 | } |
| 2634 | } |
| 2635 | } |
| 2636 | |
| 2637 | /* See whether we can group stub sections together. Grouping stub |
| 2638 | sections may result in fewer stubs. More importantly, we need to |
| 2639 | put all .init* and .fini* stubs at the beginning of the .init or |
| 2640 | .fini output sections respectively, because glibc splits the |
| 2641 | _init and _fini functions into multiple parts. Putting a stub in |
| 2642 | the middle of a function is not a good idea. */ |
| 2643 | |
| 2644 | static void |
| 2645 | group_sections (struct elf_aarch64_link_hash_table *htab, |
| 2646 | bfd_size_type stub_group_size, |
| 2647 | bfd_boolean stubs_always_before_branch) |
| 2648 | { |
| 2649 | asection **list = htab->input_list + htab->top_index; |
| 2650 | |
| 2651 | do |
| 2652 | { |
| 2653 | asection *tail = *list; |
| 2654 | |
| 2655 | if (tail == bfd_abs_section_ptr) |
| 2656 | continue; |
| 2657 | |
| 2658 | while (tail != NULL) |
| 2659 | { |
| 2660 | asection *curr; |
| 2661 | asection *prev; |
| 2662 | bfd_size_type total; |
| 2663 | |
| 2664 | curr = tail; |
| 2665 | total = tail->size; |
| 2666 | while ((prev = PREV_SEC (curr)) != NULL |
| 2667 | && ((total += curr->output_offset - prev->output_offset) |
| 2668 | < stub_group_size)) |
| 2669 | curr = prev; |
| 2670 | |
| 2671 | /* OK, the size from the start of CURR to the end is less |
| 2672 | than stub_group_size and thus can be handled by one stub |
| 2673 | section. (Or the tail section is itself larger than |
| 2674 | stub_group_size, in which case we may be toast.) |
| 2675 | We should really be keeping track of the total size of |
| 2676 | stubs added here, as stubs contribute to the final output |
| 2677 | section size. */ |
| 2678 | do |
| 2679 | { |
| 2680 | prev = PREV_SEC (tail); |
| 2681 | /* Set up this stub group. */ |
| 2682 | htab->stub_group[tail->id].link_sec = curr; |
| 2683 | } |
| 2684 | while (tail != curr && (tail = prev) != NULL); |
| 2685 | |
| 2686 | /* But wait, there's more! Input sections up to stub_group_size |
| 2687 | bytes before the stub section can be handled by it too. */ |
| 2688 | if (!stubs_always_before_branch) |
| 2689 | { |
| 2690 | total = 0; |
| 2691 | while (prev != NULL |
| 2692 | && ((total += tail->output_offset - prev->output_offset) |
| 2693 | < stub_group_size)) |
| 2694 | { |
| 2695 | tail = prev; |
| 2696 | prev = PREV_SEC (tail); |
| 2697 | htab->stub_group[tail->id].link_sec = curr; |
| 2698 | } |
| 2699 | } |
| 2700 | tail = prev; |
| 2701 | } |
| 2702 | } |
| 2703 | while (list-- != htab->input_list); |
| 2704 | |
| 2705 | free (htab->input_list); |
| 2706 | } |
| 2707 | |
| 2708 | #undef PREV_SEC |
| 2709 | |
| 2710 | #define AARCH64_BITS(x, pos, n) (((x) >> (pos)) & ((1 << (n)) - 1)) |
| 2711 | |
| 2712 | #define AARCH64_RT(insn) AARCH64_BITS (insn, 0, 5) |
| 2713 | #define AARCH64_RT2(insn) AARCH64_BITS (insn, 10, 5) |
| 2714 | #define AARCH64_RA(insn) AARCH64_BITS (insn, 10, 5) |
| 2715 | #define AARCH64_RD(insn) AARCH64_BITS (insn, 0, 5) |
| 2716 | #define AARCH64_RN(insn) AARCH64_BITS (insn, 5, 5) |
| 2717 | #define AARCH64_RM(insn) AARCH64_BITS (insn, 16, 5) |
| 2718 | |
| 2719 | #define AARCH64_MAC(insn) (((insn) & 0xff000000) == 0x9b000000) |
| 2720 | #define AARCH64_BIT(insn, n) AARCH64_BITS (insn, n, 1) |
| 2721 | #define AARCH64_OP31(insn) AARCH64_BITS (insn, 21, 3) |
| 2722 | #define AARCH64_ZR 0x1f |
| 2723 | |
| 2724 | /* All ld/st ops. See C4-182 of the ARM ARM. The encoding space for |
| 2725 | LD_PCREL, LDST_RO, LDST_UI and LDST_UIMM cover prefetch ops. */ |
| 2726 | |
| 2727 | #define AARCH64_LD(insn) (AARCH64_BIT (insn, 22) == 1) |
| 2728 | #define AARCH64_LDST(insn) (((insn) & 0x0a000000) == 0x08000000) |
| 2729 | #define AARCH64_LDST_EX(insn) (((insn) & 0x3f000000) == 0x08000000) |
| 2730 | #define AARCH64_LDST_PCREL(insn) (((insn) & 0x3b000000) == 0x18000000) |
| 2731 | #define AARCH64_LDST_NAP(insn) (((insn) & 0x3b800000) == 0x28000000) |
| 2732 | #define AARCH64_LDSTP_PI(insn) (((insn) & 0x3b800000) == 0x28800000) |
| 2733 | #define AARCH64_LDSTP_O(insn) (((insn) & 0x3b800000) == 0x29000000) |
| 2734 | #define AARCH64_LDSTP_PRE(insn) (((insn) & 0x3b800000) == 0x29800000) |
| 2735 | #define AARCH64_LDST_UI(insn) (((insn) & 0x3b200c00) == 0x38000000) |
| 2736 | #define AARCH64_LDST_PIIMM(insn) (((insn) & 0x3b200c00) == 0x38000400) |
| 2737 | #define AARCH64_LDST_U(insn) (((insn) & 0x3b200c00) == 0x38000800) |
| 2738 | #define AARCH64_LDST_PREIMM(insn) (((insn) & 0x3b200c00) == 0x38000c00) |
| 2739 | #define AARCH64_LDST_RO(insn) (((insn) & 0x3b200c00) == 0x38200800) |
| 2740 | #define AARCH64_LDST_UIMM(insn) (((insn) & 0x3b000000) == 0x39000000) |
| 2741 | #define AARCH64_LDST_SIMD_M(insn) (((insn) & 0xbfbf0000) == 0x0c000000) |
| 2742 | #define AARCH64_LDST_SIMD_M_PI(insn) (((insn) & 0xbfa00000) == 0x0c800000) |
| 2743 | #define AARCH64_LDST_SIMD_S(insn) (((insn) & 0xbf9f0000) == 0x0d000000) |
| 2744 | #define AARCH64_LDST_SIMD_S_PI(insn) (((insn) & 0xbf800000) == 0x0d800000) |
| 2745 | |
| 2746 | /* Classify an INSN if it is indeed a load/store. Return TRUE if INSN |
| 2747 | is a load/store along with the Rt and Rtn. Return FALSE if not a |
| 2748 | load/store. */ |
| 2749 | |
| 2750 | static bfd_boolean |
| 2751 | aarch64_mem_op_p (uint32_t insn, unsigned int *rt, unsigned int *rtn, |
| 2752 | bfd_boolean *pair, bfd_boolean *load) |
| 2753 | { |
| 2754 | uint32_t opcode; |
| 2755 | unsigned int r; |
| 2756 | uint32_t opc = 0; |
| 2757 | uint32_t v = 0; |
| 2758 | uint32_t opc_v = 0; |
| 2759 | |
| 2760 | /* Bail out quickly if INSN doesn't fall into the the load-store |
| 2761 | encoding space. */ |
| 2762 | if (!AARCH64_LDST (insn)) |
| 2763 | return FALSE; |
| 2764 | |
| 2765 | *pair = FALSE; |
| 2766 | *load = FALSE; |
| 2767 | if (AARCH64_LDST_EX (insn)) |
| 2768 | { |
| 2769 | *rt = AARCH64_RT (insn); |
| 2770 | *rtn = *rt; |
| 2771 | if (AARCH64_BIT (insn, 21) == 1) |
| 2772 | { |
| 2773 | *pair = TRUE; |
| 2774 | *rtn = AARCH64_RT2 (insn); |
| 2775 | } |
| 2776 | *load = AARCH64_LD (insn); |
| 2777 | return TRUE; |
| 2778 | } |
| 2779 | else if (AARCH64_LDST_NAP (insn) |
| 2780 | || AARCH64_LDSTP_PI (insn) |
| 2781 | || AARCH64_LDSTP_O (insn) |
| 2782 | || AARCH64_LDSTP_PRE (insn)) |
| 2783 | { |
| 2784 | *pair = TRUE; |
| 2785 | *rt = AARCH64_RT (insn); |
| 2786 | *rtn = AARCH64_RT2 (insn); |
| 2787 | *load = AARCH64_LD (insn); |
| 2788 | return TRUE; |
| 2789 | } |
| 2790 | else if (AARCH64_LDST_PCREL (insn) |
| 2791 | || AARCH64_LDST_UI (insn) |
| 2792 | || AARCH64_LDST_PIIMM (insn) |
| 2793 | || AARCH64_LDST_U (insn) |
| 2794 | || AARCH64_LDST_PREIMM (insn) |
| 2795 | || AARCH64_LDST_RO (insn) |
| 2796 | || AARCH64_LDST_UIMM (insn)) |
| 2797 | { |
| 2798 | *rt = AARCH64_RT (insn); |
| 2799 | *rtn = *rt; |
| 2800 | if (AARCH64_LDST_PCREL (insn)) |
| 2801 | *load = TRUE; |
| 2802 | opc = AARCH64_BITS (insn, 22, 2); |
| 2803 | v = AARCH64_BIT (insn, 26); |
| 2804 | opc_v = opc | (v << 2); |
| 2805 | *load = (opc_v == 1 || opc_v == 2 || opc_v == 3 |
| 2806 | || opc_v == 5 || opc_v == 7); |
| 2807 | return TRUE; |
| 2808 | } |
| 2809 | else if (AARCH64_LDST_SIMD_M (insn) |
| 2810 | || AARCH64_LDST_SIMD_M_PI (insn)) |
| 2811 | { |
| 2812 | *rt = AARCH64_RT (insn); |
| 2813 | *load = AARCH64_BIT (insn, 22); |
| 2814 | opcode = (insn >> 12) & 0xf; |
| 2815 | switch (opcode) |
| 2816 | { |
| 2817 | case 0: |
| 2818 | case 2: |
| 2819 | *rtn = *rt + 3; |
| 2820 | break; |
| 2821 | |
| 2822 | case 4: |
| 2823 | case 6: |
| 2824 | *rtn = *rt + 2; |
| 2825 | break; |
| 2826 | |
| 2827 | case 7: |
| 2828 | *rtn = *rt; |
| 2829 | break; |
| 2830 | |
| 2831 | case 8: |
| 2832 | case 10: |
| 2833 | *rtn = *rt + 1; |
| 2834 | break; |
| 2835 | |
| 2836 | default: |
| 2837 | return FALSE; |
| 2838 | } |
| 2839 | return TRUE; |
| 2840 | } |
| 2841 | else if (AARCH64_LDST_SIMD_S (insn) |
| 2842 | || AARCH64_LDST_SIMD_S_PI (insn)) |
| 2843 | { |
| 2844 | *rt = AARCH64_RT (insn); |
| 2845 | r = (insn >> 21) & 1; |
| 2846 | *load = AARCH64_BIT (insn, 22); |
| 2847 | opcode = (insn >> 13) & 0x7; |
| 2848 | switch (opcode) |
| 2849 | { |
| 2850 | case 0: |
| 2851 | case 2: |
| 2852 | case 4: |
| 2853 | *rtn = *rt + r; |
| 2854 | break; |
| 2855 | |
| 2856 | case 1: |
| 2857 | case 3: |
| 2858 | case 5: |
| 2859 | *rtn = *rt + (r == 0 ? 2 : 3); |
| 2860 | break; |
| 2861 | |
| 2862 | case 6: |
| 2863 | *rtn = *rt + r; |
| 2864 | break; |
| 2865 | |
| 2866 | case 7: |
| 2867 | *rtn = *rt + (r == 0 ? 2 : 3); |
| 2868 | break; |
| 2869 | |
| 2870 | default: |
| 2871 | return FALSE; |
| 2872 | } |
| 2873 | return TRUE; |
| 2874 | } |
| 2875 | |
| 2876 | return FALSE; |
| 2877 | } |
| 2878 | |
| 2879 | /* Return TRUE if INSN is multiply-accumulate. */ |
| 2880 | |
| 2881 | static bfd_boolean |
| 2882 | aarch64_mlxl_p (uint32_t insn) |
| 2883 | { |
| 2884 | uint32_t op31 = AARCH64_OP31 (insn); |
| 2885 | |
| 2886 | if (AARCH64_MAC (insn) |
| 2887 | && (op31 == 0 || op31 == 1 || op31 == 5) |
| 2888 | /* Exclude MUL instructions which are encoded as a multiple accumulate |
| 2889 | with RA = XZR. */ |
| 2890 | && AARCH64_RA (insn) != AARCH64_ZR) |
| 2891 | return TRUE; |
| 2892 | |
| 2893 | return FALSE; |
| 2894 | } |
| 2895 | |
| 2896 | /* Some early revisions of the Cortex-A53 have an erratum (835769) whereby |
| 2897 | it is possible for a 64-bit multiply-accumulate instruction to generate an |
| 2898 | incorrect result. The details are quite complex and hard to |
| 2899 | determine statically, since branches in the code may exist in some |
| 2900 | circumstances, but all cases end with a memory (load, store, or |
| 2901 | prefetch) instruction followed immediately by the multiply-accumulate |
| 2902 | operation. We employ a linker patching technique, by moving the potentially |
| 2903 | affected multiply-accumulate instruction into a patch region and replacing |
| 2904 | the original instruction with a branch to the patch. This function checks |
| 2905 | if INSN_1 is the memory operation followed by a multiply-accumulate |
| 2906 | operation (INSN_2). Return TRUE if an erratum sequence is found, FALSE |
| 2907 | if INSN_1 and INSN_2 are safe. */ |
| 2908 | |
| 2909 | static bfd_boolean |
| 2910 | aarch64_erratum_sequence (uint32_t insn_1, uint32_t insn_2) |
| 2911 | { |
| 2912 | uint32_t rt; |
| 2913 | uint32_t rtn; |
| 2914 | uint32_t rn; |
| 2915 | uint32_t rm; |
| 2916 | uint32_t ra; |
| 2917 | bfd_boolean pair; |
| 2918 | bfd_boolean load; |
| 2919 | |
| 2920 | if (aarch64_mlxl_p (insn_2) |
| 2921 | && aarch64_mem_op_p (insn_1, &rt, &rtn, &pair, &load)) |
| 2922 | { |
| 2923 | /* Any SIMD memory op is independent of the subsequent MLA |
| 2924 | by definition of the erratum. */ |
| 2925 | if (AARCH64_BIT (insn_1, 26)) |
| 2926 | return TRUE; |
| 2927 | |
| 2928 | /* If not SIMD, check for integer memory ops and MLA relationship. */ |
| 2929 | rn = AARCH64_RN (insn_2); |
| 2930 | ra = AARCH64_RA (insn_2); |
| 2931 | rm = AARCH64_RM (insn_2); |
| 2932 | |
| 2933 | /* If this is a load and there's a true(RAW) dependency, we are safe |
| 2934 | and this is not an erratum sequence. */ |
| 2935 | if (load && |
| 2936 | (rt == rn || rt == rm || rt == ra |
| 2937 | || (pair && (rtn == rn || rtn == rm || rtn == ra)))) |
| 2938 | return FALSE; |
| 2939 | |
| 2940 | /* We conservatively put out stubs for all other cases (including |
| 2941 | writebacks). */ |
| 2942 | return TRUE; |
| 2943 | } |
| 2944 | |
| 2945 | return FALSE; |
| 2946 | } |
| 2947 | |
| 2948 | /* Used to order a list of mapping symbols by address. */ |
| 2949 | |
| 2950 | static int |
| 2951 | elf_aarch64_compare_mapping (const void *a, const void *b) |
| 2952 | { |
| 2953 | const elf_aarch64_section_map *amap = (const elf_aarch64_section_map *) a; |
| 2954 | const elf_aarch64_section_map *bmap = (const elf_aarch64_section_map *) b; |
| 2955 | |
| 2956 | if (amap->vma > bmap->vma) |
| 2957 | return 1; |
| 2958 | else if (amap->vma < bmap->vma) |
| 2959 | return -1; |
| 2960 | else if (amap->type > bmap->type) |
| 2961 | /* Ensure results do not depend on the host qsort for objects with |
| 2962 | multiple mapping symbols at the same address by sorting on type |
| 2963 | after vma. */ |
| 2964 | return 1; |
| 2965 | else if (amap->type < bmap->type) |
| 2966 | return -1; |
| 2967 | else |
| 2968 | return 0; |
| 2969 | } |
| 2970 | |
| 2971 | static bfd_boolean |
| 2972 | erratum_835769_scan (bfd *input_bfd, |
| 2973 | struct bfd_link_info *info, |
| 2974 | struct aarch64_erratum_835769_fix **fixes_p, |
| 2975 | unsigned int *num_fixes_p, |
| 2976 | unsigned int *fix_table_size_p) |
| 2977 | { |
| 2978 | asection *section; |
| 2979 | struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info); |
| 2980 | struct aarch64_erratum_835769_fix *fixes = *fixes_p; |
| 2981 | unsigned int num_fixes = *num_fixes_p; |
| 2982 | unsigned int fix_table_size = *fix_table_size_p; |
| 2983 | |
| 2984 | if (htab == NULL) |
| 2985 | return FALSE; |
| 2986 | |
| 2987 | for (section = input_bfd->sections; |
| 2988 | section != NULL; |
| 2989 | section = section->next) |
| 2990 | { |
| 2991 | bfd_byte *contents = NULL; |
| 2992 | struct _aarch64_elf_section_data *sec_data; |
| 2993 | unsigned int span; |
| 2994 | |
| 2995 | if (elf_section_type (section) != SHT_PROGBITS |
| 2996 | || (elf_section_flags (section) & SHF_EXECINSTR) == 0 |
| 2997 | || (section->flags & SEC_EXCLUDE) != 0 |
| 2998 | || (section->sec_info_type == SEC_INFO_TYPE_JUST_SYMS) |
| 2999 | || (section->output_section == bfd_abs_section_ptr)) |
| 3000 | continue; |
| 3001 | |
| 3002 | if (elf_section_data (section)->this_hdr.contents != NULL) |
| 3003 | contents = elf_section_data (section)->this_hdr.contents; |
| 3004 | else if (! bfd_malloc_and_get_section (input_bfd, section, &contents)) |
| 3005 | return TRUE; |
| 3006 | |
| 3007 | sec_data = elf_aarch64_section_data (section); |
| 3008 | |
| 3009 | qsort (sec_data->map, sec_data->mapcount, |
| 3010 | sizeof (elf_aarch64_section_map), elf_aarch64_compare_mapping); |
| 3011 | |
| 3012 | for (span = 0; span < sec_data->mapcount; span++) |
| 3013 | { |
| 3014 | unsigned int span_start = sec_data->map[span].vma; |
| 3015 | unsigned int span_end = ((span == sec_data->mapcount - 1) |
| 3016 | ? sec_data->map[0].vma + section->size |
| 3017 | : sec_data->map[span + 1].vma); |
| 3018 | unsigned int i; |
| 3019 | char span_type = sec_data->map[span].type; |
| 3020 | |
| 3021 | if (span_type == 'd') |
| 3022 | continue; |
| 3023 | |
| 3024 | for (i = span_start; i + 4 < span_end; i += 4) |
| 3025 | { |
| 3026 | uint32_t insn_1 = bfd_getl32 (contents + i); |
| 3027 | uint32_t insn_2 = bfd_getl32 (contents + i + 4); |
| 3028 | |
| 3029 | if (aarch64_erratum_sequence (insn_1, insn_2)) |
| 3030 | { |
| 3031 | char *stub_name = NULL; |
| 3032 | stub_name = (char *) bfd_malloc |
| 3033 | (strlen ("__erratum_835769_veneer_") + 16); |
| 3034 | if (stub_name != NULL) |
| 3035 | sprintf |
| 3036 | (stub_name,"__erratum_835769_veneer_%d", num_fixes); |
| 3037 | else |
| 3038 | return TRUE; |
| 3039 | |
| 3040 | if (num_fixes == fix_table_size) |
| 3041 | { |
| 3042 | fix_table_size *= 2; |
| 3043 | fixes = |
| 3044 | (struct aarch64_erratum_835769_fix *) |
| 3045 | bfd_realloc (fixes, |
| 3046 | sizeof (struct aarch64_erratum_835769_fix) |
| 3047 | * fix_table_size); |
| 3048 | if (fixes == NULL) |
| 3049 | return TRUE; |
| 3050 | } |
| 3051 | |
| 3052 | fixes[num_fixes].input_bfd = input_bfd; |
| 3053 | fixes[num_fixes].section = section; |
| 3054 | fixes[num_fixes].offset = i + 4; |
| 3055 | fixes[num_fixes].veneered_insn = insn_2; |
| 3056 | fixes[num_fixes].stub_name = stub_name; |
| 3057 | fixes[num_fixes].stub_type = aarch64_stub_erratum_835769_veneer; |
| 3058 | num_fixes++; |
| 3059 | } |
| 3060 | } |
| 3061 | } |
| 3062 | if (elf_section_data (section)->this_hdr.contents == NULL) |
| 3063 | free (contents); |
| 3064 | } |
| 3065 | |
| 3066 | *fixes_p = fixes; |
| 3067 | *num_fixes_p = num_fixes; |
| 3068 | *fix_table_size_p = fix_table_size; |
| 3069 | return FALSE; |
| 3070 | } |
| 3071 | |
| 3072 | /* Find or create a stub section. Returns a pointer to the stub section, and |
| 3073 | the section to which the stub section will be attached (in *LINK_SEC_P). |
| 3074 | LINK_SEC_P may be NULL. */ |
| 3075 | |
| 3076 | static asection * |
| 3077 | elf_aarch64_create_or_find_stub_sec (asection **link_sec_p, asection *section, |
| 3078 | struct elf_aarch64_link_hash_table *htab) |
| 3079 | { |
| 3080 | asection *link_sec; |
| 3081 | asection *stub_sec; |
| 3082 | |
| 3083 | link_sec = htab->stub_group[section->id].link_sec; |
| 3084 | BFD_ASSERT (link_sec != NULL); |
| 3085 | stub_sec = htab->stub_group[section->id].stub_sec; |
| 3086 | |
| 3087 | if (stub_sec == NULL) |
| 3088 | { |
| 3089 | stub_sec = htab->stub_group[link_sec->id].stub_sec; |
| 3090 | if (stub_sec == NULL) |
| 3091 | { |
| 3092 | size_t namelen; |
| 3093 | bfd_size_type len; |
| 3094 | char *s_name; |
| 3095 | |
| 3096 | namelen = strlen (link_sec->name); |
| 3097 | len = namelen + sizeof (STUB_SUFFIX); |
| 3098 | s_name = (char *) bfd_alloc (htab->stub_bfd, len); |
| 3099 | if (s_name == NULL) |
| 3100 | return NULL; |
| 3101 | |
| 3102 | memcpy (s_name, link_sec->name, namelen); |
| 3103 | memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX)); |
| 3104 | stub_sec = (*htab->add_stub_section) (s_name, link_sec); |
| 3105 | |
| 3106 | if (stub_sec == NULL) |
| 3107 | return NULL; |
| 3108 | htab->stub_group[link_sec->id].stub_sec = stub_sec; |
| 3109 | } |
| 3110 | htab->stub_group[section->id].stub_sec = stub_sec; |
| 3111 | } |
| 3112 | |
| 3113 | if (link_sec_p) |
| 3114 | *link_sec_p = link_sec; |
| 3115 | |
| 3116 | return stub_sec; |
| 3117 | } |
| 3118 | |
| 3119 | /* Determine and set the size of the stub section for a final link. |
| 3120 | |
| 3121 | The basic idea here is to examine all the relocations looking for |
| 3122 | PC-relative calls to a target that is unreachable with a "bl" |
| 3123 | instruction. */ |
| 3124 | |
| 3125 | bfd_boolean |
| 3126 | elfNN_aarch64_size_stubs (bfd *output_bfd, |
| 3127 | bfd *stub_bfd, |
| 3128 | struct bfd_link_info *info, |
| 3129 | bfd_signed_vma group_size, |
| 3130 | asection * (*add_stub_section) (const char *, |
| 3131 | asection *), |
| 3132 | void (*layout_sections_again) (void)) |
| 3133 | { |
| 3134 | bfd_size_type stub_group_size; |
| 3135 | bfd_boolean stubs_always_before_branch; |
| 3136 | bfd_boolean stub_changed = 0; |
| 3137 | struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info); |
| 3138 | struct aarch64_erratum_835769_fix *erratum_835769_fixes = NULL; |
| 3139 | unsigned int num_erratum_835769_fixes = 0; |
| 3140 | unsigned int erratum_835769_fix_table_size = 10; |
| 3141 | unsigned int i; |
| 3142 | |
| 3143 | if (htab->fix_erratum_835769) |
| 3144 | { |
| 3145 | erratum_835769_fixes |
| 3146 | = (struct aarch64_erratum_835769_fix *) |
| 3147 | bfd_zmalloc |
| 3148 | (sizeof (struct aarch64_erratum_835769_fix) * |
| 3149 | erratum_835769_fix_table_size); |
| 3150 | if (erratum_835769_fixes == NULL) |
| 3151 | goto error_ret_free_local; |
| 3152 | } |
| 3153 | |
| 3154 | /* Propagate mach to stub bfd, because it may not have been |
| 3155 | finalized when we created stub_bfd. */ |
| 3156 | bfd_set_arch_mach (stub_bfd, bfd_get_arch (output_bfd), |
| 3157 | bfd_get_mach (output_bfd)); |
| 3158 | |
| 3159 | /* Stash our params away. */ |
| 3160 | htab->stub_bfd = stub_bfd; |
| 3161 | htab->add_stub_section = add_stub_section; |
| 3162 | htab->layout_sections_again = layout_sections_again; |
| 3163 | stubs_always_before_branch = group_size < 0; |
| 3164 | if (group_size < 0) |
| 3165 | stub_group_size = -group_size; |
| 3166 | else |
| 3167 | stub_group_size = group_size; |
| 3168 | |
| 3169 | if (stub_group_size == 1) |
| 3170 | { |
| 3171 | /* Default values. */ |
| 3172 | /* AArch64 branch range is +-128MB. The value used is 1MB less. */ |
| 3173 | stub_group_size = 127 * 1024 * 1024; |
| 3174 | } |
| 3175 | |
| 3176 | group_sections (htab, stub_group_size, stubs_always_before_branch); |
| 3177 | |
| 3178 | while (1) |
| 3179 | { |
| 3180 | bfd *input_bfd; |
| 3181 | unsigned int bfd_indx; |
| 3182 | asection *stub_sec; |
| 3183 | unsigned prev_num_erratum_835769_fixes = num_erratum_835769_fixes; |
| 3184 | |
| 3185 | num_erratum_835769_fixes = 0; |
| 3186 | for (input_bfd = info->input_bfds, bfd_indx = 0; |
| 3187 | input_bfd != NULL; input_bfd = input_bfd->link.next, bfd_indx++) |
| 3188 | { |
| 3189 | Elf_Internal_Shdr *symtab_hdr; |
| 3190 | asection *section; |
| 3191 | Elf_Internal_Sym *local_syms = NULL; |
| 3192 | |
| 3193 | /* We'll need the symbol table in a second. */ |
| 3194 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 3195 | if (symtab_hdr->sh_info == 0) |
| 3196 | continue; |
| 3197 | |
| 3198 | /* Walk over each section attached to the input bfd. */ |
| 3199 | for (section = input_bfd->sections; |
| 3200 | section != NULL; section = section->next) |
| 3201 | { |
| 3202 | Elf_Internal_Rela *internal_relocs, *irelaend, *irela; |
| 3203 | |
| 3204 | /* If there aren't any relocs, then there's nothing more |
| 3205 | to do. */ |
| 3206 | if ((section->flags & SEC_RELOC) == 0 |
| 3207 | || section->reloc_count == 0 |
| 3208 | || (section->flags & SEC_CODE) == 0) |
| 3209 | continue; |
| 3210 | |
| 3211 | /* If this section is a link-once section that will be |
| 3212 | discarded, then don't create any stubs. */ |
| 3213 | if (section->output_section == NULL |
| 3214 | || section->output_section->owner != output_bfd) |
| 3215 | continue; |
| 3216 | |
| 3217 | /* Get the relocs. */ |
| 3218 | internal_relocs |
| 3219 | = _bfd_elf_link_read_relocs (input_bfd, section, NULL, |
| 3220 | NULL, info->keep_memory); |
| 3221 | if (internal_relocs == NULL) |
| 3222 | goto error_ret_free_local; |
| 3223 | |
| 3224 | /* Now examine each relocation. */ |
| 3225 | irela = internal_relocs; |
| 3226 | irelaend = irela + section->reloc_count; |
| 3227 | for (; irela < irelaend; irela++) |
| 3228 | { |
| 3229 | unsigned int r_type, r_indx; |
| 3230 | enum elf_aarch64_stub_type stub_type; |
| 3231 | struct elf_aarch64_stub_hash_entry *stub_entry; |
| 3232 | asection *sym_sec; |
| 3233 | bfd_vma sym_value; |
| 3234 | bfd_vma destination; |
| 3235 | struct elf_aarch64_link_hash_entry *hash; |
| 3236 | const char *sym_name; |
| 3237 | char *stub_name; |
| 3238 | const asection *id_sec; |
| 3239 | unsigned char st_type; |
| 3240 | bfd_size_type len; |
| 3241 | |
| 3242 | r_type = ELFNN_R_TYPE (irela->r_info); |
| 3243 | r_indx = ELFNN_R_SYM (irela->r_info); |
| 3244 | |
| 3245 | if (r_type >= (unsigned int) R_AARCH64_end) |
| 3246 | { |
| 3247 | bfd_set_error (bfd_error_bad_value); |
| 3248 | error_ret_free_internal: |
| 3249 | if (elf_section_data (section)->relocs == NULL) |
| 3250 | free (internal_relocs); |
| 3251 | goto error_ret_free_local; |
| 3252 | } |
| 3253 | |
| 3254 | /* Only look for stubs on unconditional branch and |
| 3255 | branch and link instructions. */ |
| 3256 | if (r_type != (unsigned int) AARCH64_R (CALL26) |
| 3257 | && r_type != (unsigned int) AARCH64_R (JUMP26)) |
| 3258 | continue; |
| 3259 | |
| 3260 | /* Now determine the call target, its name, value, |
| 3261 | section. */ |
| 3262 | sym_sec = NULL; |
| 3263 | sym_value = 0; |
| 3264 | destination = 0; |
| 3265 | hash = NULL; |
| 3266 | sym_name = NULL; |
| 3267 | if (r_indx < symtab_hdr->sh_info) |
| 3268 | { |
| 3269 | /* It's a local symbol. */ |
| 3270 | Elf_Internal_Sym *sym; |
| 3271 | Elf_Internal_Shdr *hdr; |
| 3272 | |
| 3273 | if (local_syms == NULL) |
| 3274 | { |
| 3275 | local_syms |
| 3276 | = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 3277 | if (local_syms == NULL) |
| 3278 | local_syms |
| 3279 | = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, |
| 3280 | symtab_hdr->sh_info, 0, |
| 3281 | NULL, NULL, NULL); |
| 3282 | if (local_syms == NULL) |
| 3283 | goto error_ret_free_internal; |
| 3284 | } |
| 3285 | |
| 3286 | sym = local_syms + r_indx; |
| 3287 | hdr = elf_elfsections (input_bfd)[sym->st_shndx]; |
| 3288 | sym_sec = hdr->bfd_section; |
| 3289 | if (!sym_sec) |
| 3290 | /* This is an undefined symbol. It can never |
| 3291 | be resolved. */ |
| 3292 | continue; |
| 3293 | |
| 3294 | if (ELF_ST_TYPE (sym->st_info) != STT_SECTION) |
| 3295 | sym_value = sym->st_value; |
| 3296 | destination = (sym_value + irela->r_addend |
| 3297 | + sym_sec->output_offset |
| 3298 | + sym_sec->output_section->vma); |
| 3299 | st_type = ELF_ST_TYPE (sym->st_info); |
| 3300 | sym_name |
| 3301 | = bfd_elf_string_from_elf_section (input_bfd, |
| 3302 | symtab_hdr->sh_link, |
| 3303 | sym->st_name); |
| 3304 | } |
| 3305 | else |
| 3306 | { |
| 3307 | int e_indx; |
| 3308 | |
| 3309 | e_indx = r_indx - symtab_hdr->sh_info; |
| 3310 | hash = ((struct elf_aarch64_link_hash_entry *) |
| 3311 | elf_sym_hashes (input_bfd)[e_indx]); |
| 3312 | |
| 3313 | while (hash->root.root.type == bfd_link_hash_indirect |
| 3314 | || hash->root.root.type == bfd_link_hash_warning) |
| 3315 | hash = ((struct elf_aarch64_link_hash_entry *) |
| 3316 | hash->root.root.u.i.link); |
| 3317 | |
| 3318 | if (hash->root.root.type == bfd_link_hash_defined |
| 3319 | || hash->root.root.type == bfd_link_hash_defweak) |
| 3320 | { |
| 3321 | struct elf_aarch64_link_hash_table *globals = |
| 3322 | elf_aarch64_hash_table (info); |
| 3323 | sym_sec = hash->root.root.u.def.section; |
| 3324 | sym_value = hash->root.root.u.def.value; |
| 3325 | /* For a destination in a shared library, |
| 3326 | use the PLT stub as target address to |
| 3327 | decide whether a branch stub is |
| 3328 | needed. */ |
| 3329 | if (globals->root.splt != NULL && hash != NULL |
| 3330 | && hash->root.plt.offset != (bfd_vma) - 1) |
| 3331 | { |
| 3332 | sym_sec = globals->root.splt; |
| 3333 | sym_value = hash->root.plt.offset; |
| 3334 | if (sym_sec->output_section != NULL) |
| 3335 | destination = (sym_value |
| 3336 | + sym_sec->output_offset |
| 3337 | + |
| 3338 | sym_sec->output_section->vma); |
| 3339 | } |
| 3340 | else if (sym_sec->output_section != NULL) |
| 3341 | destination = (sym_value + irela->r_addend |
| 3342 | + sym_sec->output_offset |
| 3343 | + sym_sec->output_section->vma); |
| 3344 | } |
| 3345 | else if (hash->root.root.type == bfd_link_hash_undefined |
| 3346 | || (hash->root.root.type |
| 3347 | == bfd_link_hash_undefweak)) |
| 3348 | { |
| 3349 | /* For a shared library, use the PLT stub as |
| 3350 | target address to decide whether a long |
| 3351 | branch stub is needed. |
| 3352 | For absolute code, they cannot be handled. */ |
| 3353 | struct elf_aarch64_link_hash_table *globals = |
| 3354 | elf_aarch64_hash_table (info); |
| 3355 | |
| 3356 | if (globals->root.splt != NULL && hash != NULL |
| 3357 | && hash->root.plt.offset != (bfd_vma) - 1) |
| 3358 | { |
| 3359 | sym_sec = globals->root.splt; |
| 3360 | sym_value = hash->root.plt.offset; |
| 3361 | if (sym_sec->output_section != NULL) |
| 3362 | destination = (sym_value |
| 3363 | + sym_sec->output_offset |
| 3364 | + |
| 3365 | sym_sec->output_section->vma); |
| 3366 | } |
| 3367 | else |
| 3368 | continue; |
| 3369 | } |
| 3370 | else |
| 3371 | { |
| 3372 | bfd_set_error (bfd_error_bad_value); |
| 3373 | goto error_ret_free_internal; |
| 3374 | } |
| 3375 | st_type = ELF_ST_TYPE (hash->root.type); |
| 3376 | sym_name = hash->root.root.root.string; |
| 3377 | } |
| 3378 | |
| 3379 | /* Determine what (if any) linker stub is needed. */ |
| 3380 | stub_type = aarch64_type_of_stub |
| 3381 | (info, section, irela, st_type, hash, destination); |
| 3382 | if (stub_type == aarch64_stub_none) |
| 3383 | continue; |
| 3384 | |
| 3385 | /* Support for grouping stub sections. */ |
| 3386 | id_sec = htab->stub_group[section->id].link_sec; |
| 3387 | |
| 3388 | /* Get the name of this stub. */ |
| 3389 | stub_name = elfNN_aarch64_stub_name (id_sec, sym_sec, hash, |
| 3390 | irela); |
| 3391 | if (!stub_name) |
| 3392 | goto error_ret_free_internal; |
| 3393 | |
| 3394 | stub_entry = |
| 3395 | aarch64_stub_hash_lookup (&htab->stub_hash_table, |
| 3396 | stub_name, FALSE, FALSE); |
| 3397 | if (stub_entry != NULL) |
| 3398 | { |
| 3399 | /* The proper stub has already been created. */ |
| 3400 | free (stub_name); |
| 3401 | continue; |
| 3402 | } |
| 3403 | |
| 3404 | stub_entry = elfNN_aarch64_add_stub (stub_name, section, |
| 3405 | htab); |
| 3406 | if (stub_entry == NULL) |
| 3407 | { |
| 3408 | free (stub_name); |
| 3409 | goto error_ret_free_internal; |
| 3410 | } |
| 3411 | |
| 3412 | stub_entry->target_value = sym_value; |
| 3413 | stub_entry->target_section = sym_sec; |
| 3414 | stub_entry->stub_type = stub_type; |
| 3415 | stub_entry->h = hash; |
| 3416 | stub_entry->st_type = st_type; |
| 3417 | |
| 3418 | if (sym_name == NULL) |
| 3419 | sym_name = "unnamed"; |
| 3420 | len = sizeof (STUB_ENTRY_NAME) + strlen (sym_name); |
| 3421 | stub_entry->output_name = bfd_alloc (htab->stub_bfd, len); |
| 3422 | if (stub_entry->output_name == NULL) |
| 3423 | { |
| 3424 | free (stub_name); |
| 3425 | goto error_ret_free_internal; |
| 3426 | } |
| 3427 | |
| 3428 | snprintf (stub_entry->output_name, len, STUB_ENTRY_NAME, |
| 3429 | sym_name); |
| 3430 | |
| 3431 | stub_changed = TRUE; |
| 3432 | } |
| 3433 | |
| 3434 | /* We're done with the internal relocs, free them. */ |
| 3435 | if (elf_section_data (section)->relocs == NULL) |
| 3436 | free (internal_relocs); |
| 3437 | } |
| 3438 | |
| 3439 | if (htab->fix_erratum_835769) |
| 3440 | { |
| 3441 | /* Scan for sequences which might trigger erratum 835769. */ |
| 3442 | if (erratum_835769_scan (input_bfd, info, &erratum_835769_fixes, |
| 3443 | &num_erratum_835769_fixes, |
| 3444 | &erratum_835769_fix_table_size) != 0) |
| 3445 | goto error_ret_free_local; |
| 3446 | } |
| 3447 | } |
| 3448 | |
| 3449 | if (prev_num_erratum_835769_fixes != num_erratum_835769_fixes) |
| 3450 | stub_changed = TRUE; |
| 3451 | |
| 3452 | if (!stub_changed) |
| 3453 | break; |
| 3454 | |
| 3455 | /* OK, we've added some stubs. Find out the new size of the |
| 3456 | stub sections. */ |
| 3457 | for (stub_sec = htab->stub_bfd->sections; |
| 3458 | stub_sec != NULL; stub_sec = stub_sec->next) |
| 3459 | { |
| 3460 | /* Ignore non-stub sections. */ |
| 3461 | if (!strstr (stub_sec->name, STUB_SUFFIX)) |
| 3462 | continue; |
| 3463 | stub_sec->size = 0; |
| 3464 | } |
| 3465 | |
| 3466 | bfd_hash_traverse (&htab->stub_hash_table, aarch64_size_one_stub, htab); |
| 3467 | |
| 3468 | /* Add erratum 835769 veneers to stub section sizes too. */ |
| 3469 | if (htab->fix_erratum_835769) |
| 3470 | for (i = 0; i < num_erratum_835769_fixes; i++) |
| 3471 | { |
| 3472 | stub_sec = elf_aarch64_create_or_find_stub_sec (NULL, |
| 3473 | erratum_835769_fixes[i].section, htab); |
| 3474 | |
| 3475 | if (stub_sec == NULL) |
| 3476 | goto error_ret_free_local; |
| 3477 | |
| 3478 | stub_sec->size += 8; |
| 3479 | } |
| 3480 | |
| 3481 | /* Ask the linker to do its stuff. */ |
| 3482 | (*htab->layout_sections_again) (); |
| 3483 | stub_changed = FALSE; |
| 3484 | } |
| 3485 | |
| 3486 | /* Add stubs for erratum 835769 fixes now. */ |
| 3487 | if (htab->fix_erratum_835769) |
| 3488 | { |
| 3489 | for (i = 0; i < num_erratum_835769_fixes; i++) |
| 3490 | { |
| 3491 | struct elf_aarch64_stub_hash_entry *stub_entry; |
| 3492 | char *stub_name = erratum_835769_fixes[i].stub_name; |
| 3493 | asection *section = erratum_835769_fixes[i].section; |
| 3494 | unsigned int section_id = erratum_835769_fixes[i].section->id; |
| 3495 | asection *link_sec = htab->stub_group[section_id].link_sec; |
| 3496 | asection *stub_sec = htab->stub_group[section_id].stub_sec; |
| 3497 | |
| 3498 | stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table, |
| 3499 | stub_name, TRUE, FALSE); |
| 3500 | if (stub_entry == NULL) |
| 3501 | { |
| 3502 | (*_bfd_error_handler) (_("%s: cannot create stub entry %s"), |
| 3503 | section->owner, |
| 3504 | stub_name); |
| 3505 | return FALSE; |
| 3506 | } |
| 3507 | |
| 3508 | stub_entry->stub_sec = stub_sec; |
| 3509 | stub_entry->stub_offset = 0; |
| 3510 | stub_entry->id_sec = link_sec; |
| 3511 | stub_entry->stub_type = erratum_835769_fixes[i].stub_type; |
| 3512 | stub_entry->target_section = section; |
| 3513 | stub_entry->target_value = erratum_835769_fixes[i].offset; |
| 3514 | stub_entry->veneered_insn = erratum_835769_fixes[i].veneered_insn; |
| 3515 | stub_entry->output_name = erratum_835769_fixes[i].stub_name; |
| 3516 | } |
| 3517 | |
| 3518 | /* Stash the erratum 835769 fix array for use later in |
| 3519 | elfNN_aarch64_write_section(). */ |
| 3520 | htab->aarch64_erratum_835769_fixes = erratum_835769_fixes; |
| 3521 | htab->num_aarch64_erratum_835769_fixes = num_erratum_835769_fixes; |
| 3522 | } |
| 3523 | else |
| 3524 | { |
| 3525 | htab->aarch64_erratum_835769_fixes = NULL; |
| 3526 | htab->num_aarch64_erratum_835769_fixes = 0; |
| 3527 | } |
| 3528 | |
| 3529 | return TRUE; |
| 3530 | |
| 3531 | error_ret_free_local: |
| 3532 | return FALSE; |
| 3533 | } |
| 3534 | |
| 3535 | /* Build all the stubs associated with the current output file. The |
| 3536 | stubs are kept in a hash table attached to the main linker hash |
| 3537 | table. We also set up the .plt entries for statically linked PIC |
| 3538 | functions here. This function is called via aarch64_elf_finish in the |
| 3539 | linker. */ |
| 3540 | |
| 3541 | bfd_boolean |
| 3542 | elfNN_aarch64_build_stubs (struct bfd_link_info *info) |
| 3543 | { |
| 3544 | asection *stub_sec; |
| 3545 | struct bfd_hash_table *table; |
| 3546 | struct elf_aarch64_link_hash_table *htab; |
| 3547 | |
| 3548 | htab = elf_aarch64_hash_table (info); |
| 3549 | |
| 3550 | for (stub_sec = htab->stub_bfd->sections; |
| 3551 | stub_sec != NULL; stub_sec = stub_sec->next) |
| 3552 | { |
| 3553 | bfd_size_type size; |
| 3554 | |
| 3555 | /* Ignore non-stub sections. */ |
| 3556 | if (!strstr (stub_sec->name, STUB_SUFFIX)) |
| 3557 | continue; |
| 3558 | |
| 3559 | /* Allocate memory to hold the linker stubs. */ |
| 3560 | size = stub_sec->size; |
| 3561 | stub_sec->contents = bfd_zalloc (htab->stub_bfd, size); |
| 3562 | if (stub_sec->contents == NULL && size != 0) |
| 3563 | return FALSE; |
| 3564 | stub_sec->size = 0; |
| 3565 | } |
| 3566 | |
| 3567 | /* Build the stubs as directed by the stub hash table. */ |
| 3568 | table = &htab->stub_hash_table; |
| 3569 | bfd_hash_traverse (table, aarch64_build_one_stub, info); |
| 3570 | |
| 3571 | return TRUE; |
| 3572 | } |
| 3573 | |
| 3574 | |
| 3575 | /* Add an entry to the code/data map for section SEC. */ |
| 3576 | |
| 3577 | static void |
| 3578 | elfNN_aarch64_section_map_add (asection *sec, char type, bfd_vma vma) |
| 3579 | { |
| 3580 | struct _aarch64_elf_section_data *sec_data = |
| 3581 | elf_aarch64_section_data (sec); |
| 3582 | unsigned int newidx; |
| 3583 | |
| 3584 | if (sec_data->map == NULL) |
| 3585 | { |
| 3586 | sec_data->map = bfd_malloc (sizeof (elf_aarch64_section_map)); |
| 3587 | sec_data->mapcount = 0; |
| 3588 | sec_data->mapsize = 1; |
| 3589 | } |
| 3590 | |
| 3591 | newidx = sec_data->mapcount++; |
| 3592 | |
| 3593 | if (sec_data->mapcount > sec_data->mapsize) |
| 3594 | { |
| 3595 | sec_data->mapsize *= 2; |
| 3596 | sec_data->map = bfd_realloc_or_free |
| 3597 | (sec_data->map, sec_data->mapsize * sizeof (elf_aarch64_section_map)); |
| 3598 | } |
| 3599 | |
| 3600 | if (sec_data->map) |
| 3601 | { |
| 3602 | sec_data->map[newidx].vma = vma; |
| 3603 | sec_data->map[newidx].type = type; |
| 3604 | } |
| 3605 | } |
| 3606 | |
| 3607 | |
| 3608 | /* Initialise maps of insn/data for input BFDs. */ |
| 3609 | void |
| 3610 | bfd_elfNN_aarch64_init_maps (bfd *abfd) |
| 3611 | { |
| 3612 | Elf_Internal_Sym *isymbuf; |
| 3613 | Elf_Internal_Shdr *hdr; |
| 3614 | unsigned int i, localsyms; |
| 3615 | |
| 3616 | /* Make sure that we are dealing with an AArch64 elf binary. */ |
| 3617 | if (!is_aarch64_elf (abfd)) |
| 3618 | return; |
| 3619 | |
| 3620 | if ((abfd->flags & DYNAMIC) != 0) |
| 3621 | return; |
| 3622 | |
| 3623 | hdr = &elf_symtab_hdr (abfd); |
| 3624 | localsyms = hdr->sh_info; |
| 3625 | |
| 3626 | /* Obtain a buffer full of symbols for this BFD. The hdr->sh_info field |
| 3627 | should contain the number of local symbols, which should come before any |
| 3628 | global symbols. Mapping symbols are always local. */ |
| 3629 | isymbuf = bfd_elf_get_elf_syms (abfd, hdr, localsyms, 0, NULL, NULL, NULL); |
| 3630 | |
| 3631 | /* No internal symbols read? Skip this BFD. */ |
| 3632 | if (isymbuf == NULL) |
| 3633 | return; |
| 3634 | |
| 3635 | for (i = 0; i < localsyms; i++) |
| 3636 | { |
| 3637 | Elf_Internal_Sym *isym = &isymbuf[i]; |
| 3638 | asection *sec = bfd_section_from_elf_index (abfd, isym->st_shndx); |
| 3639 | const char *name; |
| 3640 | |
| 3641 | if (sec != NULL && ELF_ST_BIND (isym->st_info) == STB_LOCAL) |
| 3642 | { |
| 3643 | name = bfd_elf_string_from_elf_section (abfd, |
| 3644 | hdr->sh_link, |
| 3645 | isym->st_name); |
| 3646 | |
| 3647 | if (bfd_is_aarch64_special_symbol_name |
| 3648 | (name, BFD_AARCH64_SPECIAL_SYM_TYPE_MAP)) |
| 3649 | elfNN_aarch64_section_map_add (sec, name[1], isym->st_value); |
| 3650 | } |
| 3651 | } |
| 3652 | } |
| 3653 | |
| 3654 | /* Set option values needed during linking. */ |
| 3655 | void |
| 3656 | bfd_elfNN_aarch64_set_options (struct bfd *output_bfd, |
| 3657 | struct bfd_link_info *link_info, |
| 3658 | int no_enum_warn, |
| 3659 | int no_wchar_warn, int pic_veneer, |
| 3660 | int fix_erratum_835769) |
| 3661 | { |
| 3662 | struct elf_aarch64_link_hash_table *globals; |
| 3663 | |
| 3664 | globals = elf_aarch64_hash_table (link_info); |
| 3665 | globals->pic_veneer = pic_veneer; |
| 3666 | globals->fix_erratum_835769 = fix_erratum_835769; |
| 3667 | |
| 3668 | BFD_ASSERT (is_aarch64_elf (output_bfd)); |
| 3669 | elf_aarch64_tdata (output_bfd)->no_enum_size_warning = no_enum_warn; |
| 3670 | elf_aarch64_tdata (output_bfd)->no_wchar_size_warning = no_wchar_warn; |
| 3671 | } |
| 3672 | |
| 3673 | static bfd_vma |
| 3674 | aarch64_calculate_got_entry_vma (struct elf_link_hash_entry *h, |
| 3675 | struct elf_aarch64_link_hash_table |
| 3676 | *globals, struct bfd_link_info *info, |
| 3677 | bfd_vma value, bfd *output_bfd, |
| 3678 | bfd_boolean *unresolved_reloc_p) |
| 3679 | { |
| 3680 | bfd_vma off = (bfd_vma) - 1; |
| 3681 | asection *basegot = globals->root.sgot; |
| 3682 | bfd_boolean dyn = globals->root.dynamic_sections_created; |
| 3683 | |
| 3684 | if (h != NULL) |
| 3685 | { |
| 3686 | BFD_ASSERT (basegot != NULL); |
| 3687 | off = h->got.offset; |
| 3688 | BFD_ASSERT (off != (bfd_vma) - 1); |
| 3689 | if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
| 3690 | || (info->shared |
| 3691 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
| 3692 | || (ELF_ST_VISIBILITY (h->other) |
| 3693 | && h->root.type == bfd_link_hash_undefweak)) |
| 3694 | { |
| 3695 | /* This is actually a static link, or it is a -Bsymbolic link |
| 3696 | and the symbol is defined locally. We must initialize this |
| 3697 | entry in the global offset table. Since the offset must |
| 3698 | always be a multiple of 8 (4 in the case of ILP32), we use |
| 3699 | the least significant bit to record whether we have |
| 3700 | initialized it already. |
| 3701 | When doing a dynamic link, we create a .rel(a).got relocation |
| 3702 | entry to initialize the value. This is done in the |
| 3703 | finish_dynamic_symbol routine. */ |
| 3704 | if ((off & 1) != 0) |
| 3705 | off &= ~1; |
| 3706 | else |
| 3707 | { |
| 3708 | bfd_put_NN (output_bfd, value, basegot->contents + off); |
| 3709 | h->got.offset |= 1; |
| 3710 | } |
| 3711 | } |
| 3712 | else |
| 3713 | *unresolved_reloc_p = FALSE; |
| 3714 | |
| 3715 | off = off + basegot->output_section->vma + basegot->output_offset; |
| 3716 | } |
| 3717 | |
| 3718 | return off; |
| 3719 | } |
| 3720 | |
| 3721 | /* Change R_TYPE to a more efficient access model where possible, |
| 3722 | return the new reloc type. */ |
| 3723 | |
| 3724 | static bfd_reloc_code_real_type |
| 3725 | aarch64_tls_transition_without_check (bfd_reloc_code_real_type r_type, |
| 3726 | struct elf_link_hash_entry *h) |
| 3727 | { |
| 3728 | bfd_boolean is_local = h == NULL; |
| 3729 | |
| 3730 | switch (r_type) |
| 3731 | { |
| 3732 | case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21: |
| 3733 | case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21: |
| 3734 | return (is_local |
| 3735 | ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1 |
| 3736 | : BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21); |
| 3737 | |
| 3738 | case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC: |
| 3739 | case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC: |
| 3740 | return (is_local |
| 3741 | ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC |
| 3742 | : BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC); |
| 3743 | |
| 3744 | case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: |
| 3745 | return is_local ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1 : r_type; |
| 3746 | |
| 3747 | case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC: |
| 3748 | return is_local ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC : r_type; |
| 3749 | |
| 3750 | case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC: |
| 3751 | case BFD_RELOC_AARCH64_TLSDESC_CALL: |
| 3752 | /* Instructions with these relocations will become NOPs. */ |
| 3753 | return BFD_RELOC_AARCH64_NONE; |
| 3754 | |
| 3755 | default: |
| 3756 | break; |
| 3757 | } |
| 3758 | |
| 3759 | return r_type; |
| 3760 | } |
| 3761 | |
| 3762 | static unsigned int |
| 3763 | aarch64_reloc_got_type (bfd_reloc_code_real_type r_type) |
| 3764 | { |
| 3765 | switch (r_type) |
| 3766 | { |
| 3767 | case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC: |
| 3768 | case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC: |
| 3769 | case BFD_RELOC_AARCH64_ADR_GOT_PAGE: |
| 3770 | case BFD_RELOC_AARCH64_GOT_LD_PREL19: |
| 3771 | return GOT_NORMAL; |
| 3772 | |
| 3773 | case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21: |
| 3774 | case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC: |
| 3775 | return GOT_TLS_GD; |
| 3776 | |
| 3777 | case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC: |
| 3778 | case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21: |
| 3779 | case BFD_RELOC_AARCH64_TLSDESC_CALL: |
| 3780 | case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC: |
| 3781 | case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC: |
| 3782 | return GOT_TLSDESC_GD; |
| 3783 | |
| 3784 | case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: |
| 3785 | case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: |
| 3786 | case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC: |
| 3787 | return GOT_TLS_IE; |
| 3788 | |
| 3789 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12: |
| 3790 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12: |
| 3791 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC: |
| 3792 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0: |
| 3793 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC: |
| 3794 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1: |
| 3795 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC: |
| 3796 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2: |
| 3797 | return GOT_UNKNOWN; |
| 3798 | |
| 3799 | default: |
| 3800 | break; |
| 3801 | } |
| 3802 | return GOT_UNKNOWN; |
| 3803 | } |
| 3804 | |
| 3805 | static bfd_boolean |
| 3806 | aarch64_can_relax_tls (bfd *input_bfd, |
| 3807 | struct bfd_link_info *info, |
| 3808 | bfd_reloc_code_real_type r_type, |
| 3809 | struct elf_link_hash_entry *h, |
| 3810 | unsigned long r_symndx) |
| 3811 | { |
| 3812 | unsigned int symbol_got_type; |
| 3813 | unsigned int reloc_got_type; |
| 3814 | |
| 3815 | if (! IS_AARCH64_TLS_RELOC (r_type)) |
| 3816 | return FALSE; |
| 3817 | |
| 3818 | symbol_got_type = elfNN_aarch64_symbol_got_type (h, input_bfd, r_symndx); |
| 3819 | reloc_got_type = aarch64_reloc_got_type (r_type); |
| 3820 | |
| 3821 | if (symbol_got_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (reloc_got_type)) |
| 3822 | return TRUE; |
| 3823 | |
| 3824 | if (info->shared) |
| 3825 | return FALSE; |
| 3826 | |
| 3827 | if (h && h->root.type == bfd_link_hash_undefweak) |
| 3828 | return FALSE; |
| 3829 | |
| 3830 | return TRUE; |
| 3831 | } |
| 3832 | |
| 3833 | /* Given the relocation code R_TYPE, return the relaxed bfd reloc |
| 3834 | enumerator. */ |
| 3835 | |
| 3836 | static bfd_reloc_code_real_type |
| 3837 | aarch64_tls_transition (bfd *input_bfd, |
| 3838 | struct bfd_link_info *info, |
| 3839 | unsigned int r_type, |
| 3840 | struct elf_link_hash_entry *h, |
| 3841 | unsigned long r_symndx) |
| 3842 | { |
| 3843 | bfd_reloc_code_real_type bfd_r_type |
| 3844 | = elfNN_aarch64_bfd_reloc_from_type (r_type); |
| 3845 | |
| 3846 | if (! aarch64_can_relax_tls (input_bfd, info, bfd_r_type, h, r_symndx)) |
| 3847 | return bfd_r_type; |
| 3848 | |
| 3849 | return aarch64_tls_transition_without_check (bfd_r_type, h); |
| 3850 | } |
| 3851 | |
| 3852 | /* Return the base VMA address which should be subtracted from real addresses |
| 3853 | when resolving R_AARCH64_TLS_DTPREL relocation. */ |
| 3854 | |
| 3855 | static bfd_vma |
| 3856 | dtpoff_base (struct bfd_link_info *info) |
| 3857 | { |
| 3858 | /* If tls_sec is NULL, we should have signalled an error already. */ |
| 3859 | BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL); |
| 3860 | return elf_hash_table (info)->tls_sec->vma; |
| 3861 | } |
| 3862 | |
| 3863 | /* Return the base VMA address which should be subtracted from real addresses |
| 3864 | when resolving R_AARCH64_TLS_GOTTPREL64 relocations. */ |
| 3865 | |
| 3866 | static bfd_vma |
| 3867 | tpoff_base (struct bfd_link_info *info) |
| 3868 | { |
| 3869 | struct elf_link_hash_table *htab = elf_hash_table (info); |
| 3870 | |
| 3871 | /* If tls_sec is NULL, we should have signalled an error already. */ |
| 3872 | BFD_ASSERT (htab->tls_sec != NULL); |
| 3873 | |
| 3874 | bfd_vma base = align_power ((bfd_vma) TCB_SIZE, |
| 3875 | htab->tls_sec->alignment_power); |
| 3876 | return htab->tls_sec->vma - base; |
| 3877 | } |
| 3878 | |
| 3879 | static bfd_vma * |
| 3880 | symbol_got_offset_ref (bfd *input_bfd, struct elf_link_hash_entry *h, |
| 3881 | unsigned long r_symndx) |
| 3882 | { |
| 3883 | /* Calculate the address of the GOT entry for symbol |
| 3884 | referred to in h. */ |
| 3885 | if (h != NULL) |
| 3886 | return &h->got.offset; |
| 3887 | else |
| 3888 | { |
| 3889 | /* local symbol */ |
| 3890 | struct elf_aarch64_local_symbol *l; |
| 3891 | |
| 3892 | l = elf_aarch64_locals (input_bfd); |
| 3893 | return &l[r_symndx].got_offset; |
| 3894 | } |
| 3895 | } |
| 3896 | |
| 3897 | static void |
| 3898 | symbol_got_offset_mark (bfd *input_bfd, struct elf_link_hash_entry *h, |
| 3899 | unsigned long r_symndx) |
| 3900 | { |
| 3901 | bfd_vma *p; |
| 3902 | p = symbol_got_offset_ref (input_bfd, h, r_symndx); |
| 3903 | *p |= 1; |
| 3904 | } |
| 3905 | |
| 3906 | static int |
| 3907 | symbol_got_offset_mark_p (bfd *input_bfd, struct elf_link_hash_entry *h, |
| 3908 | unsigned long r_symndx) |
| 3909 | { |
| 3910 | bfd_vma value; |
| 3911 | value = * symbol_got_offset_ref (input_bfd, h, r_symndx); |
| 3912 | return value & 1; |
| 3913 | } |
| 3914 | |
| 3915 | static bfd_vma |
| 3916 | symbol_got_offset (bfd *input_bfd, struct elf_link_hash_entry *h, |
| 3917 | unsigned long r_symndx) |
| 3918 | { |
| 3919 | bfd_vma value; |
| 3920 | value = * symbol_got_offset_ref (input_bfd, h, r_symndx); |
| 3921 | value &= ~1; |
| 3922 | return value; |
| 3923 | } |
| 3924 | |
| 3925 | static bfd_vma * |
| 3926 | symbol_tlsdesc_got_offset_ref (bfd *input_bfd, struct elf_link_hash_entry *h, |
| 3927 | unsigned long r_symndx) |
| 3928 | { |
| 3929 | /* Calculate the address of the GOT entry for symbol |
| 3930 | referred to in h. */ |
| 3931 | if (h != NULL) |
| 3932 | { |
| 3933 | struct elf_aarch64_link_hash_entry *eh; |
| 3934 | eh = (struct elf_aarch64_link_hash_entry *) h; |
| 3935 | return &eh->tlsdesc_got_jump_table_offset; |
| 3936 | } |
| 3937 | else |
| 3938 | { |
| 3939 | /* local symbol */ |
| 3940 | struct elf_aarch64_local_symbol *l; |
| 3941 | |
| 3942 | l = elf_aarch64_locals (input_bfd); |
| 3943 | return &l[r_symndx].tlsdesc_got_jump_table_offset; |
| 3944 | } |
| 3945 | } |
| 3946 | |
| 3947 | static void |
| 3948 | symbol_tlsdesc_got_offset_mark (bfd *input_bfd, struct elf_link_hash_entry *h, |
| 3949 | unsigned long r_symndx) |
| 3950 | { |
| 3951 | bfd_vma *p; |
| 3952 | p = symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx); |
| 3953 | *p |= 1; |
| 3954 | } |
| 3955 | |
| 3956 | static int |
| 3957 | symbol_tlsdesc_got_offset_mark_p (bfd *input_bfd, |
| 3958 | struct elf_link_hash_entry *h, |
| 3959 | unsigned long r_symndx) |
| 3960 | { |
| 3961 | bfd_vma value; |
| 3962 | value = * symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx); |
| 3963 | return value & 1; |
| 3964 | } |
| 3965 | |
| 3966 | static bfd_vma |
| 3967 | symbol_tlsdesc_got_offset (bfd *input_bfd, struct elf_link_hash_entry *h, |
| 3968 | unsigned long r_symndx) |
| 3969 | { |
| 3970 | bfd_vma value; |
| 3971 | value = * symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx); |
| 3972 | value &= ~1; |
| 3973 | return value; |
| 3974 | } |
| 3975 | |
| 3976 | /* Data for make_branch_to_erratum_835769_stub(). */ |
| 3977 | |
| 3978 | struct erratum_835769_branch_to_stub_data |
| 3979 | { |
| 3980 | asection *output_section; |
| 3981 | bfd_byte *contents; |
| 3982 | }; |
| 3983 | |
| 3984 | /* Helper to insert branches to erratum 835769 stubs in the right |
| 3985 | places for a particular section. */ |
| 3986 | |
| 3987 | static bfd_boolean |
| 3988 | make_branch_to_erratum_835769_stub (struct bfd_hash_entry *gen_entry, |
| 3989 | void *in_arg) |
| 3990 | { |
| 3991 | struct elf_aarch64_stub_hash_entry *stub_entry; |
| 3992 | struct erratum_835769_branch_to_stub_data *data; |
| 3993 | bfd_byte *contents; |
| 3994 | unsigned long branch_insn = 0; |
| 3995 | bfd_vma veneered_insn_loc, veneer_entry_loc; |
| 3996 | bfd_signed_vma branch_offset; |
| 3997 | unsigned int target; |
| 3998 | bfd *abfd; |
| 3999 | |
| 4000 | stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry; |
| 4001 | data = (struct erratum_835769_branch_to_stub_data *) in_arg; |
| 4002 | |
| 4003 | if (stub_entry->target_section != data->output_section |
| 4004 | || stub_entry->stub_type != aarch64_stub_erratum_835769_veneer) |
| 4005 | return TRUE; |
| 4006 | |
| 4007 | contents = data->contents; |
| 4008 | veneered_insn_loc = stub_entry->target_section->output_section->vma |
| 4009 | + stub_entry->target_section->output_offset |
| 4010 | + stub_entry->target_value; |
| 4011 | veneer_entry_loc = stub_entry->stub_sec->output_section->vma |
| 4012 | + stub_entry->stub_sec->output_offset |
| 4013 | + stub_entry->stub_offset; |
| 4014 | branch_offset = veneer_entry_loc - veneered_insn_loc; |
| 4015 | |
| 4016 | abfd = stub_entry->target_section->owner; |
| 4017 | if (!aarch64_valid_branch_p (veneer_entry_loc, veneered_insn_loc)) |
| 4018 | (*_bfd_error_handler) |
| 4019 | (_("%B: error: Erratum 835769 stub out " |
| 4020 | "of range (input file too large)"), abfd); |
| 4021 | |
| 4022 | target = stub_entry->target_value; |
| 4023 | branch_insn = 0x14000000; |
| 4024 | branch_offset >>= 2; |
| 4025 | branch_offset &= 0x3ffffff; |
| 4026 | branch_insn |= branch_offset; |
| 4027 | bfd_putl32 (branch_insn, &contents[target]); |
| 4028 | |
| 4029 | return TRUE; |
| 4030 | } |
| 4031 | |
| 4032 | static bfd_boolean |
| 4033 | elfNN_aarch64_write_section (bfd *output_bfd ATTRIBUTE_UNUSED, |
| 4034 | struct bfd_link_info *link_info, |
| 4035 | asection *sec, |
| 4036 | bfd_byte *contents) |
| 4037 | |
| 4038 | { |
| 4039 | struct elf_aarch64_link_hash_table *globals = |
| 4040 | elf_aarch64_hash_table (link_info); |
| 4041 | |
| 4042 | if (globals == NULL) |
| 4043 | return FALSE; |
| 4044 | |
| 4045 | /* Fix code to point to erratum 835769 stubs. */ |
| 4046 | if (globals->fix_erratum_835769) |
| 4047 | { |
| 4048 | struct erratum_835769_branch_to_stub_data data; |
| 4049 | |
| 4050 | data.output_section = sec; |
| 4051 | data.contents = contents; |
| 4052 | bfd_hash_traverse (&globals->stub_hash_table, |
| 4053 | make_branch_to_erratum_835769_stub, &data); |
| 4054 | } |
| 4055 | |
| 4056 | return FALSE; |
| 4057 | } |
| 4058 | |
| 4059 | /* Perform a relocation as part of a final link. */ |
| 4060 | static bfd_reloc_status_type |
| 4061 | elfNN_aarch64_final_link_relocate (reloc_howto_type *howto, |
| 4062 | bfd *input_bfd, |
| 4063 | bfd *output_bfd, |
| 4064 | asection *input_section, |
| 4065 | bfd_byte *contents, |
| 4066 | Elf_Internal_Rela *rel, |
| 4067 | bfd_vma value, |
| 4068 | struct bfd_link_info *info, |
| 4069 | asection *sym_sec, |
| 4070 | struct elf_link_hash_entry *h, |
| 4071 | bfd_boolean *unresolved_reloc_p, |
| 4072 | bfd_boolean save_addend, |
| 4073 | bfd_vma *saved_addend, |
| 4074 | Elf_Internal_Sym *sym) |
| 4075 | { |
| 4076 | Elf_Internal_Shdr *symtab_hdr; |
| 4077 | unsigned int r_type = howto->type; |
| 4078 | bfd_reloc_code_real_type bfd_r_type |
| 4079 | = elfNN_aarch64_bfd_reloc_from_howto (howto); |
| 4080 | bfd_reloc_code_real_type new_bfd_r_type; |
| 4081 | unsigned long r_symndx; |
| 4082 | bfd_byte *hit_data = contents + rel->r_offset; |
| 4083 | bfd_vma place; |
| 4084 | bfd_signed_vma signed_addend; |
| 4085 | struct elf_aarch64_link_hash_table *globals; |
| 4086 | bfd_boolean weak_undef_p; |
| 4087 | |
| 4088 | globals = elf_aarch64_hash_table (info); |
| 4089 | |
| 4090 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
| 4091 | |
| 4092 | BFD_ASSERT (is_aarch64_elf (input_bfd)); |
| 4093 | |
| 4094 | r_symndx = ELFNN_R_SYM (rel->r_info); |
| 4095 | |
| 4096 | /* It is possible to have linker relaxations on some TLS access |
| 4097 | models. Update our information here. */ |
| 4098 | new_bfd_r_type = aarch64_tls_transition (input_bfd, info, r_type, h, r_symndx); |
| 4099 | if (new_bfd_r_type != bfd_r_type) |
| 4100 | { |
| 4101 | bfd_r_type = new_bfd_r_type; |
| 4102 | howto = elfNN_aarch64_howto_from_bfd_reloc (bfd_r_type); |
| 4103 | BFD_ASSERT (howto != NULL); |
| 4104 | r_type = howto->type; |
| 4105 | } |
| 4106 | |
| 4107 | place = input_section->output_section->vma |
| 4108 | + input_section->output_offset + rel->r_offset; |
| 4109 | |
| 4110 | /* Get addend, accumulating the addend for consecutive relocs |
| 4111 | which refer to the same offset. */ |
| 4112 | signed_addend = saved_addend ? *saved_addend : 0; |
| 4113 | signed_addend += rel->r_addend; |
| 4114 | |
| 4115 | weak_undef_p = (h ? h->root.type == bfd_link_hash_undefweak |
| 4116 | : bfd_is_und_section (sym_sec)); |
| 4117 | |
| 4118 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle |
| 4119 | it here if it is defined in a non-shared object. */ |
| 4120 | if (h != NULL |
| 4121 | && h->type == STT_GNU_IFUNC |
| 4122 | && h->def_regular) |
| 4123 | { |
| 4124 | asection *plt; |
| 4125 | const char *name; |
| 4126 | asection *base_got; |
| 4127 | bfd_vma off; |
| 4128 | |
| 4129 | if ((input_section->flags & SEC_ALLOC) == 0 |
| 4130 | || h->plt.offset == (bfd_vma) -1) |
| 4131 | abort (); |
| 4132 | |
| 4133 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
| 4134 | plt = globals->root.splt ? globals->root.splt : globals->root.iplt; |
| 4135 | value = (plt->output_section->vma + plt->output_offset + h->plt.offset); |
| 4136 | |
| 4137 | switch (bfd_r_type) |
| 4138 | { |
| 4139 | default: |
| 4140 | if (h->root.root.string) |
| 4141 | name = h->root.root.string; |
| 4142 | else |
| 4143 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, |
| 4144 | NULL); |
| 4145 | (*_bfd_error_handler) |
| 4146 | (_("%B: relocation %s against STT_GNU_IFUNC " |
| 4147 | "symbol `%s' isn't handled by %s"), input_bfd, |
| 4148 | howto->name, name, __FUNCTION__); |
| 4149 | bfd_set_error (bfd_error_bad_value); |
| 4150 | return FALSE; |
| 4151 | |
| 4152 | case BFD_RELOC_AARCH64_NN: |
| 4153 | if (rel->r_addend != 0) |
| 4154 | { |
| 4155 | if (h->root.root.string) |
| 4156 | name = h->root.root.string; |
| 4157 | else |
| 4158 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, |
| 4159 | sym, NULL); |
| 4160 | (*_bfd_error_handler) |
| 4161 | (_("%B: relocation %s against STT_GNU_IFUNC " |
| 4162 | "symbol `%s' has non-zero addend: %d"), |
| 4163 | input_bfd, howto->name, name, rel->r_addend); |
| 4164 | bfd_set_error (bfd_error_bad_value); |
| 4165 | return FALSE; |
| 4166 | } |
| 4167 | |
| 4168 | /* Generate dynamic relocation only when there is a |
| 4169 | non-GOT reference in a shared object. */ |
| 4170 | if (info->shared && h->non_got_ref) |
| 4171 | { |
| 4172 | Elf_Internal_Rela outrel; |
| 4173 | asection *sreloc; |
| 4174 | |
| 4175 | /* Need a dynamic relocation to get the real function |
| 4176 | address. */ |
| 4177 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, |
| 4178 | info, |
| 4179 | input_section, |
| 4180 | rel->r_offset); |
| 4181 | if (outrel.r_offset == (bfd_vma) -1 |
| 4182 | || outrel.r_offset == (bfd_vma) -2) |
| 4183 | abort (); |
| 4184 | |
| 4185 | outrel.r_offset += (input_section->output_section->vma |
| 4186 | + input_section->output_offset); |
| 4187 | |
| 4188 | if (h->dynindx == -1 |
| 4189 | || h->forced_local |
| 4190 | || info->executable) |
| 4191 | { |
| 4192 | /* This symbol is resolved locally. */ |
| 4193 | outrel.r_info = ELFNN_R_INFO (0, AARCH64_R (IRELATIVE)); |
| 4194 | outrel.r_addend = (h->root.u.def.value |
| 4195 | + h->root.u.def.section->output_section->vma |
| 4196 | + h->root.u.def.section->output_offset); |
| 4197 | } |
| 4198 | else |
| 4199 | { |
| 4200 | outrel.r_info = ELFNN_R_INFO (h->dynindx, r_type); |
| 4201 | outrel.r_addend = 0; |
| 4202 | } |
| 4203 | |
| 4204 | sreloc = globals->root.irelifunc; |
| 4205 | elf_append_rela (output_bfd, sreloc, &outrel); |
| 4206 | |
| 4207 | /* If this reloc is against an external symbol, we |
| 4208 | do not want to fiddle with the addend. Otherwise, |
| 4209 | we need to include the symbol value so that it |
| 4210 | becomes an addend for the dynamic reloc. For an |
| 4211 | internal symbol, we have updated addend. */ |
| 4212 | return bfd_reloc_ok; |
| 4213 | } |
| 4214 | /* FALLTHROUGH */ |
| 4215 | case BFD_RELOC_AARCH64_JUMP26: |
| 4216 | case BFD_RELOC_AARCH64_CALL26: |
| 4217 | value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value, |
| 4218 | signed_addend, |
| 4219 | weak_undef_p); |
| 4220 | return _bfd_aarch64_elf_put_addend (input_bfd, hit_data, bfd_r_type, |
| 4221 | howto, value); |
| 4222 | case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC: |
| 4223 | case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC: |
| 4224 | case BFD_RELOC_AARCH64_ADR_GOT_PAGE: |
| 4225 | case BFD_RELOC_AARCH64_GOT_LD_PREL19: |
| 4226 | base_got = globals->root.sgot; |
| 4227 | off = h->got.offset; |
| 4228 | |
| 4229 | if (base_got == NULL) |
| 4230 | abort (); |
| 4231 | |
| 4232 | if (off == (bfd_vma) -1) |
| 4233 | { |
| 4234 | bfd_vma plt_index; |
| 4235 | |
| 4236 | /* We can't use h->got.offset here to save state, or |
| 4237 | even just remember the offset, as finish_dynamic_symbol |
| 4238 | would use that as offset into .got. */ |
| 4239 | |
| 4240 | if (globals->root.splt != NULL) |
| 4241 | { |
| 4242 | plt_index = ((h->plt.offset - globals->plt_header_size) / |
| 4243 | globals->plt_entry_size); |
| 4244 | off = (plt_index + 3) * GOT_ENTRY_SIZE; |
| 4245 | base_got = globals->root.sgotplt; |
| 4246 | } |
| 4247 | else |
| 4248 | { |
| 4249 | plt_index = h->plt.offset / globals->plt_entry_size; |
| 4250 | off = plt_index * GOT_ENTRY_SIZE; |
| 4251 | base_got = globals->root.igotplt; |
| 4252 | } |
| 4253 | |
| 4254 | if (h->dynindx == -1 |
| 4255 | || h->forced_local |
| 4256 | || info->symbolic) |
| 4257 | { |
| 4258 | /* This references the local definition. We must |
| 4259 | initialize this entry in the global offset table. |
| 4260 | Since the offset must always be a multiple of 8, |
| 4261 | we use the least significant bit to record |
| 4262 | whether we have initialized it already. |
| 4263 | |
| 4264 | When doing a dynamic link, we create a .rela.got |
| 4265 | relocation entry to initialize the value. This |
| 4266 | is done in the finish_dynamic_symbol routine. */ |
| 4267 | if ((off & 1) != 0) |
| 4268 | off &= ~1; |
| 4269 | else |
| 4270 | { |
| 4271 | bfd_put_NN (output_bfd, value, |
| 4272 | base_got->contents + off); |
| 4273 | /* Note that this is harmless as -1 | 1 still is -1. */ |
| 4274 | h->got.offset |= 1; |
| 4275 | } |
| 4276 | } |
| 4277 | value = (base_got->output_section->vma |
| 4278 | + base_got->output_offset + off); |
| 4279 | } |
| 4280 | else |
| 4281 | value = aarch64_calculate_got_entry_vma (h, globals, info, |
| 4282 | value, output_bfd, |
| 4283 | unresolved_reloc_p); |
| 4284 | value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value, |
| 4285 | 0, weak_undef_p); |
| 4286 | return _bfd_aarch64_elf_put_addend (input_bfd, hit_data, bfd_r_type, howto, value); |
| 4287 | case BFD_RELOC_AARCH64_ADR_HI21_PCREL: |
| 4288 | case BFD_RELOC_AARCH64_ADD_LO12: |
| 4289 | break; |
| 4290 | } |
| 4291 | } |
| 4292 | |
| 4293 | switch (bfd_r_type) |
| 4294 | { |
| 4295 | case BFD_RELOC_AARCH64_NONE: |
| 4296 | case BFD_RELOC_AARCH64_TLSDESC_CALL: |
| 4297 | *unresolved_reloc_p = FALSE; |
| 4298 | return bfd_reloc_ok; |
| 4299 | |
| 4300 | case BFD_RELOC_AARCH64_NN: |
| 4301 | |
| 4302 | /* When generating a shared object or relocatable executable, these |
| 4303 | relocations are copied into the output file to be resolved at |
| 4304 | run time. */ |
| 4305 | if (((info->shared == TRUE) || globals->root.is_relocatable_executable) |
| 4306 | && (input_section->flags & SEC_ALLOC) |
| 4307 | && (h == NULL |
| 4308 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 4309 | || h->root.type != bfd_link_hash_undefweak)) |
| 4310 | { |
| 4311 | Elf_Internal_Rela outrel; |
| 4312 | bfd_byte *loc; |
| 4313 | bfd_boolean skip, relocate; |
| 4314 | asection *sreloc; |
| 4315 | |
| 4316 | *unresolved_reloc_p = FALSE; |
| 4317 | |
| 4318 | skip = FALSE; |
| 4319 | relocate = FALSE; |
| 4320 | |
| 4321 | outrel.r_addend = signed_addend; |
| 4322 | outrel.r_offset = |
| 4323 | _bfd_elf_section_offset (output_bfd, info, input_section, |
| 4324 | rel->r_offset); |
| 4325 | if (outrel.r_offset == (bfd_vma) - 1) |
| 4326 | skip = TRUE; |
| 4327 | else if (outrel.r_offset == (bfd_vma) - 2) |
| 4328 | { |
| 4329 | skip = TRUE; |
| 4330 | relocate = TRUE; |
| 4331 | } |
| 4332 | |
| 4333 | outrel.r_offset += (input_section->output_section->vma |
| 4334 | + input_section->output_offset); |
| 4335 | |
| 4336 | if (skip) |
| 4337 | memset (&outrel, 0, sizeof outrel); |
| 4338 | else if (h != NULL |
| 4339 | && h->dynindx != -1 |
| 4340 | && (!info->shared || !SYMBOLIC_BIND (info, h) || !h->def_regular)) |
| 4341 | outrel.r_info = ELFNN_R_INFO (h->dynindx, r_type); |
| 4342 | else |
| 4343 | { |
| 4344 | int symbol; |
| 4345 | |
| 4346 | /* On SVR4-ish systems, the dynamic loader cannot |
| 4347 | relocate the text and data segments independently, |
| 4348 | so the symbol does not matter. */ |
| 4349 | symbol = 0; |
| 4350 | outrel.r_info = ELFNN_R_INFO (symbol, AARCH64_R (RELATIVE)); |
| 4351 | outrel.r_addend += value; |
| 4352 | } |
| 4353 | |
| 4354 | sreloc = elf_section_data (input_section)->sreloc; |
| 4355 | if (sreloc == NULL || sreloc->contents == NULL) |
| 4356 | return bfd_reloc_notsupported; |
| 4357 | |
| 4358 | loc = sreloc->contents + sreloc->reloc_count++ * RELOC_SIZE (globals); |
| 4359 | bfd_elfNN_swap_reloca_out (output_bfd, &outrel, loc); |
| 4360 | |
| 4361 | if (sreloc->reloc_count * RELOC_SIZE (globals) > sreloc->size) |
| 4362 | { |
| 4363 | /* Sanity to check that we have previously allocated |
| 4364 | sufficient space in the relocation section for the |
| 4365 | number of relocations we actually want to emit. */ |
| 4366 | abort (); |
| 4367 | } |
| 4368 | |
| 4369 | /* If this reloc is against an external symbol, we do not want to |
| 4370 | fiddle with the addend. Otherwise, we need to include the symbol |
| 4371 | value so that it becomes an addend for the dynamic reloc. */ |
| 4372 | if (!relocate) |
| 4373 | return bfd_reloc_ok; |
| 4374 | |
| 4375 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 4376 | contents, rel->r_offset, value, |
| 4377 | signed_addend); |
| 4378 | } |
| 4379 | else |
| 4380 | value += signed_addend; |
| 4381 | break; |
| 4382 | |
| 4383 | case BFD_RELOC_AARCH64_JUMP26: |
| 4384 | case BFD_RELOC_AARCH64_CALL26: |
| 4385 | { |
| 4386 | asection *splt = globals->root.splt; |
| 4387 | bfd_boolean via_plt_p = |
| 4388 | splt != NULL && h != NULL && h->plt.offset != (bfd_vma) - 1; |
| 4389 | |
| 4390 | /* A call to an undefined weak symbol is converted to a jump to |
| 4391 | the next instruction unless a PLT entry will be created. |
| 4392 | The jump to the next instruction is optimized as a NOP. |
| 4393 | Do the same for local undefined symbols. */ |
| 4394 | if (weak_undef_p && ! via_plt_p) |
| 4395 | { |
| 4396 | bfd_putl32 (INSN_NOP, hit_data); |
| 4397 | return bfd_reloc_ok; |
| 4398 | } |
| 4399 | |
| 4400 | /* If the call goes through a PLT entry, make sure to |
| 4401 | check distance to the right destination address. */ |
| 4402 | if (via_plt_p) |
| 4403 | { |
| 4404 | value = (splt->output_section->vma |
| 4405 | + splt->output_offset + h->plt.offset); |
| 4406 | *unresolved_reloc_p = FALSE; |
| 4407 | } |
| 4408 | |
| 4409 | /* If the target symbol is global and marked as a function the |
| 4410 | relocation applies a function call or a tail call. In this |
| 4411 | situation we can veneer out of range branches. The veneers |
| 4412 | use IP0 and IP1 hence cannot be used arbitrary out of range |
| 4413 | branches that occur within the body of a function. */ |
| 4414 | if (h && h->type == STT_FUNC) |
| 4415 | { |
| 4416 | /* Check if a stub has to be inserted because the destination |
| 4417 | is too far away. */ |
| 4418 | if (! aarch64_valid_branch_p (value, place)) |
| 4419 | { |
| 4420 | /* The target is out of reach, so redirect the branch to |
| 4421 | the local stub for this function. */ |
| 4422 | struct elf_aarch64_stub_hash_entry *stub_entry; |
| 4423 | stub_entry = elfNN_aarch64_get_stub_entry (input_section, |
| 4424 | sym_sec, h, |
| 4425 | rel, globals); |
| 4426 | if (stub_entry != NULL) |
| 4427 | value = (stub_entry->stub_offset |
| 4428 | + stub_entry->stub_sec->output_offset |
| 4429 | + stub_entry->stub_sec->output_section->vma); |
| 4430 | } |
| 4431 | } |
| 4432 | } |
| 4433 | value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value, |
| 4434 | signed_addend, weak_undef_p); |
| 4435 | break; |
| 4436 | |
| 4437 | case BFD_RELOC_AARCH64_16: |
| 4438 | #if ARCH_SIZE == 64 |
| 4439 | case BFD_RELOC_AARCH64_32: |
| 4440 | #endif |
| 4441 | case BFD_RELOC_AARCH64_ADD_LO12: |
| 4442 | case BFD_RELOC_AARCH64_ADR_LO21_PCREL: |
| 4443 | case BFD_RELOC_AARCH64_ADR_HI21_PCREL: |
| 4444 | case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL: |
| 4445 | case BFD_RELOC_AARCH64_BRANCH19: |
| 4446 | case BFD_RELOC_AARCH64_LD_LO19_PCREL: |
| 4447 | case BFD_RELOC_AARCH64_LDST8_LO12: |
| 4448 | case BFD_RELOC_AARCH64_LDST16_LO12: |
| 4449 | case BFD_RELOC_AARCH64_LDST32_LO12: |
| 4450 | case BFD_RELOC_AARCH64_LDST64_LO12: |
| 4451 | case BFD_RELOC_AARCH64_LDST128_LO12: |
| 4452 | case BFD_RELOC_AARCH64_MOVW_G0_S: |
| 4453 | case BFD_RELOC_AARCH64_MOVW_G1_S: |
| 4454 | case BFD_RELOC_AARCH64_MOVW_G2_S: |
| 4455 | case BFD_RELOC_AARCH64_MOVW_G0: |
| 4456 | case BFD_RELOC_AARCH64_MOVW_G0_NC: |
| 4457 | case BFD_RELOC_AARCH64_MOVW_G1: |
| 4458 | case BFD_RELOC_AARCH64_MOVW_G1_NC: |
| 4459 | case BFD_RELOC_AARCH64_MOVW_G2: |
| 4460 | case BFD_RELOC_AARCH64_MOVW_G2_NC: |
| 4461 | case BFD_RELOC_AARCH64_MOVW_G3: |
| 4462 | case BFD_RELOC_AARCH64_16_PCREL: |
| 4463 | case BFD_RELOC_AARCH64_32_PCREL: |
| 4464 | case BFD_RELOC_AARCH64_64_PCREL: |
| 4465 | case BFD_RELOC_AARCH64_TSTBR14: |
| 4466 | value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value, |
| 4467 | signed_addend, weak_undef_p); |
| 4468 | break; |
| 4469 | |
| 4470 | case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC: |
| 4471 | case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC: |
| 4472 | case BFD_RELOC_AARCH64_ADR_GOT_PAGE: |
| 4473 | case BFD_RELOC_AARCH64_GOT_LD_PREL19: |
| 4474 | if (globals->root.sgot == NULL) |
| 4475 | BFD_ASSERT (h != NULL); |
| 4476 | |
| 4477 | if (h != NULL) |
| 4478 | { |
| 4479 | value = aarch64_calculate_got_entry_vma (h, globals, info, value, |
| 4480 | output_bfd, |
| 4481 | unresolved_reloc_p); |
| 4482 | value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value, |
| 4483 | 0, weak_undef_p); |
| 4484 | } |
| 4485 | break; |
| 4486 | |
| 4487 | case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21: |
| 4488 | case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC: |
| 4489 | case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: |
| 4490 | case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: |
| 4491 | case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC: |
| 4492 | if (globals->root.sgot == NULL) |
| 4493 | return bfd_reloc_notsupported; |
| 4494 | |
| 4495 | value = (symbol_got_offset (input_bfd, h, r_symndx) |
| 4496 | + globals->root.sgot->output_section->vma |
| 4497 | + globals->root.sgot->output_offset); |
| 4498 | |
| 4499 | value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value, |
| 4500 | 0, weak_undef_p); |
| 4501 | *unresolved_reloc_p = FALSE; |
| 4502 | break; |
| 4503 | |
| 4504 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12: |
| 4505 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12: |
| 4506 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC: |
| 4507 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0: |
| 4508 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC: |
| 4509 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1: |
| 4510 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC: |
| 4511 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2: |
| 4512 | value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value, |
| 4513 | signed_addend - tpoff_base (info), |
| 4514 | weak_undef_p); |
| 4515 | *unresolved_reloc_p = FALSE; |
| 4516 | break; |
| 4517 | |
| 4518 | case BFD_RELOC_AARCH64_TLSDESC_ADD: |
| 4519 | case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC: |
| 4520 | case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21: |
| 4521 | case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC: |
| 4522 | case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC: |
| 4523 | case BFD_RELOC_AARCH64_TLSDESC_LDR: |
| 4524 | if (globals->root.sgot == NULL) |
| 4525 | return bfd_reloc_notsupported; |
| 4526 | value = (symbol_tlsdesc_got_offset (input_bfd, h, r_symndx) |
| 4527 | + globals->root.sgotplt->output_section->vma |
| 4528 | + globals->root.sgotplt->output_offset |
| 4529 | + globals->sgotplt_jump_table_size); |
| 4530 | |
| 4531 | value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value, |
| 4532 | 0, weak_undef_p); |
| 4533 | *unresolved_reloc_p = FALSE; |
| 4534 | break; |
| 4535 | |
| 4536 | default: |
| 4537 | return bfd_reloc_notsupported; |
| 4538 | } |
| 4539 | |
| 4540 | if (saved_addend) |
| 4541 | *saved_addend = value; |
| 4542 | |
| 4543 | /* Only apply the final relocation in a sequence. */ |
| 4544 | if (save_addend) |
| 4545 | return bfd_reloc_continue; |
| 4546 | |
| 4547 | return _bfd_aarch64_elf_put_addend (input_bfd, hit_data, bfd_r_type, |
| 4548 | howto, value); |
| 4549 | } |
| 4550 | |
| 4551 | /* Handle TLS relaxations. Relaxing is possible for symbols that use |
| 4552 | R_AARCH64_TLSDESC_ADR_{PAGE, LD64_LO12_NC, ADD_LO12_NC} during a static |
| 4553 | link. |
| 4554 | |
| 4555 | Return bfd_reloc_ok if we're done, bfd_reloc_continue if the caller |
| 4556 | is to then call final_link_relocate. Return other values in the |
| 4557 | case of error. */ |
| 4558 | |
| 4559 | static bfd_reloc_status_type |
| 4560 | elfNN_aarch64_tls_relax (struct elf_aarch64_link_hash_table *globals, |
| 4561 | bfd *input_bfd, bfd_byte *contents, |
| 4562 | Elf_Internal_Rela *rel, struct elf_link_hash_entry *h) |
| 4563 | { |
| 4564 | bfd_boolean is_local = h == NULL; |
| 4565 | unsigned int r_type = ELFNN_R_TYPE (rel->r_info); |
| 4566 | unsigned long insn; |
| 4567 | |
| 4568 | BFD_ASSERT (globals && input_bfd && contents && rel); |
| 4569 | |
| 4570 | switch (elfNN_aarch64_bfd_reloc_from_type (r_type)) |
| 4571 | { |
| 4572 | case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21: |
| 4573 | case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21: |
| 4574 | if (is_local) |
| 4575 | { |
| 4576 | /* GD->LE relaxation: |
| 4577 | adrp x0, :tlsgd:var => movz x0, :tprel_g1:var |
| 4578 | or |
| 4579 | adrp x0, :tlsdesc:var => movz x0, :tprel_g1:var |
| 4580 | */ |
| 4581 | bfd_putl32 (0xd2a00000, contents + rel->r_offset); |
| 4582 | return bfd_reloc_continue; |
| 4583 | } |
| 4584 | else |
| 4585 | { |
| 4586 | /* GD->IE relaxation: |
| 4587 | adrp x0, :tlsgd:var => adrp x0, :gottprel:var |
| 4588 | or |
| 4589 | adrp x0, :tlsdesc:var => adrp x0, :gottprel:var |
| 4590 | */ |
| 4591 | return bfd_reloc_continue; |
| 4592 | } |
| 4593 | |
| 4594 | case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC: |
| 4595 | if (is_local) |
| 4596 | { |
| 4597 | /* GD->LE relaxation: |
| 4598 | ldr xd, [x0, #:tlsdesc_lo12:var] => movk x0, :tprel_g0_nc:var |
| 4599 | */ |
| 4600 | bfd_putl32 (0xf2800000, contents + rel->r_offset); |
| 4601 | return bfd_reloc_continue; |
| 4602 | } |
| 4603 | else |
| 4604 | { |
| 4605 | /* GD->IE relaxation: |
| 4606 | ldr xd, [x0, #:tlsdesc_lo12:var] => ldr x0, [x0, #:gottprel_lo12:var] |
| 4607 | */ |
| 4608 | insn = bfd_getl32 (contents + rel->r_offset); |
| 4609 | insn &= 0xffffffe0; |
| 4610 | bfd_putl32 (insn, contents + rel->r_offset); |
| 4611 | return bfd_reloc_continue; |
| 4612 | } |
| 4613 | |
| 4614 | case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC: |
| 4615 | if (is_local) |
| 4616 | { |
| 4617 | /* GD->LE relaxation |
| 4618 | add x0, #:tlsgd_lo12:var => movk x0, :tprel_g0_nc:var |
| 4619 | bl __tls_get_addr => mrs x1, tpidr_el0 |
| 4620 | nop => add x0, x1, x0 |
| 4621 | */ |
| 4622 | |
| 4623 | /* First kill the tls_get_addr reloc on the bl instruction. */ |
| 4624 | BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset); |
| 4625 | rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE); |
| 4626 | |
| 4627 | bfd_putl32 (0xf2800000, contents + rel->r_offset); |
| 4628 | bfd_putl32 (0xd53bd041, contents + rel->r_offset + 4); |
| 4629 | bfd_putl32 (0x8b000020, contents + rel->r_offset + 8); |
| 4630 | return bfd_reloc_continue; |
| 4631 | } |
| 4632 | else |
| 4633 | { |
| 4634 | /* GD->IE relaxation |
| 4635 | ADD x0, #:tlsgd_lo12:var => ldr x0, [x0, #:gottprel_lo12:var] |
| 4636 | BL __tls_get_addr => mrs x1, tpidr_el0 |
| 4637 | R_AARCH64_CALL26 |
| 4638 | NOP => add x0, x1, x0 |
| 4639 | */ |
| 4640 | |
| 4641 | BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (CALL26)); |
| 4642 | |
| 4643 | /* Remove the relocation on the BL instruction. */ |
| 4644 | rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE); |
| 4645 | |
| 4646 | bfd_putl32 (0xf9400000, contents + rel->r_offset); |
| 4647 | |
| 4648 | /* We choose to fixup the BL and NOP instructions using the |
| 4649 | offset from the second relocation to allow flexibility in |
| 4650 | scheduling instructions between the ADD and BL. */ |
| 4651 | bfd_putl32 (0xd53bd041, contents + rel[1].r_offset); |
| 4652 | bfd_putl32 (0x8b000020, contents + rel[1].r_offset + 4); |
| 4653 | return bfd_reloc_continue; |
| 4654 | } |
| 4655 | |
| 4656 | case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC: |
| 4657 | case BFD_RELOC_AARCH64_TLSDESC_CALL: |
| 4658 | /* GD->IE/LE relaxation: |
| 4659 | add x0, x0, #:tlsdesc_lo12:var => nop |
| 4660 | blr xd => nop |
| 4661 | */ |
| 4662 | bfd_putl32 (INSN_NOP, contents + rel->r_offset); |
| 4663 | return bfd_reloc_ok; |
| 4664 | |
| 4665 | case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: |
| 4666 | /* IE->LE relaxation: |
| 4667 | adrp xd, :gottprel:var => movz xd, :tprel_g1:var |
| 4668 | */ |
| 4669 | if (is_local) |
| 4670 | { |
| 4671 | insn = bfd_getl32 (contents + rel->r_offset); |
| 4672 | bfd_putl32 (0xd2a00000 | (insn & 0x1f), contents + rel->r_offset); |
| 4673 | } |
| 4674 | return bfd_reloc_continue; |
| 4675 | |
| 4676 | case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC: |
| 4677 | /* IE->LE relaxation: |
| 4678 | ldr xd, [xm, #:gottprel_lo12:var] => movk xd, :tprel_g0_nc:var |
| 4679 | */ |
| 4680 | if (is_local) |
| 4681 | { |
| 4682 | insn = bfd_getl32 (contents + rel->r_offset); |
| 4683 | bfd_putl32 (0xf2800000 | (insn & 0x1f), contents + rel->r_offset); |
| 4684 | } |
| 4685 | return bfd_reloc_continue; |
| 4686 | |
| 4687 | default: |
| 4688 | return bfd_reloc_continue; |
| 4689 | } |
| 4690 | |
| 4691 | return bfd_reloc_ok; |
| 4692 | } |
| 4693 | |
| 4694 | /* Relocate an AArch64 ELF section. */ |
| 4695 | |
| 4696 | static bfd_boolean |
| 4697 | elfNN_aarch64_relocate_section (bfd *output_bfd, |
| 4698 | struct bfd_link_info *info, |
| 4699 | bfd *input_bfd, |
| 4700 | asection *input_section, |
| 4701 | bfd_byte *contents, |
| 4702 | Elf_Internal_Rela *relocs, |
| 4703 | Elf_Internal_Sym *local_syms, |
| 4704 | asection **local_sections) |
| 4705 | { |
| 4706 | Elf_Internal_Shdr *symtab_hdr; |
| 4707 | struct elf_link_hash_entry **sym_hashes; |
| 4708 | Elf_Internal_Rela *rel; |
| 4709 | Elf_Internal_Rela *relend; |
| 4710 | const char *name; |
| 4711 | struct elf_aarch64_link_hash_table *globals; |
| 4712 | bfd_boolean save_addend = FALSE; |
| 4713 | bfd_vma addend = 0; |
| 4714 | |
| 4715 | globals = elf_aarch64_hash_table (info); |
| 4716 | |
| 4717 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
| 4718 | sym_hashes = elf_sym_hashes (input_bfd); |
| 4719 | |
| 4720 | rel = relocs; |
| 4721 | relend = relocs + input_section->reloc_count; |
| 4722 | for (; rel < relend; rel++) |
| 4723 | { |
| 4724 | unsigned int r_type; |
| 4725 | bfd_reloc_code_real_type bfd_r_type; |
| 4726 | bfd_reloc_code_real_type relaxed_bfd_r_type; |
| 4727 | reloc_howto_type *howto; |
| 4728 | unsigned long r_symndx; |
| 4729 | Elf_Internal_Sym *sym; |
| 4730 | asection *sec; |
| 4731 | struct elf_link_hash_entry *h; |
| 4732 | bfd_vma relocation; |
| 4733 | bfd_reloc_status_type r; |
| 4734 | arelent bfd_reloc; |
| 4735 | char sym_type; |
| 4736 | bfd_boolean unresolved_reloc = FALSE; |
| 4737 | char *error_message = NULL; |
| 4738 | |
| 4739 | r_symndx = ELFNN_R_SYM (rel->r_info); |
| 4740 | r_type = ELFNN_R_TYPE (rel->r_info); |
| 4741 | |
| 4742 | bfd_reloc.howto = elfNN_aarch64_howto_from_type (r_type); |
| 4743 | howto = bfd_reloc.howto; |
| 4744 | |
| 4745 | if (howto == NULL) |
| 4746 | { |
| 4747 | (*_bfd_error_handler) |
| 4748 | (_("%B: unrecognized relocation (0x%x) in section `%A'"), |
| 4749 | input_bfd, input_section, r_type); |
| 4750 | return FALSE; |
| 4751 | } |
| 4752 | bfd_r_type = elfNN_aarch64_bfd_reloc_from_howto (howto); |
| 4753 | |
| 4754 | h = NULL; |
| 4755 | sym = NULL; |
| 4756 | sec = NULL; |
| 4757 | |
| 4758 | if (r_symndx < symtab_hdr->sh_info) |
| 4759 | { |
| 4760 | sym = local_syms + r_symndx; |
| 4761 | sym_type = ELFNN_ST_TYPE (sym->st_info); |
| 4762 | sec = local_sections[r_symndx]; |
| 4763 | |
| 4764 | /* An object file might have a reference to a local |
| 4765 | undefined symbol. This is a daft object file, but we |
| 4766 | should at least do something about it. */ |
| 4767 | if (r_type != R_AARCH64_NONE && r_type != R_AARCH64_NULL |
| 4768 | && bfd_is_und_section (sec) |
| 4769 | && ELF_ST_BIND (sym->st_info) != STB_WEAK) |
| 4770 | { |
| 4771 | if (!info->callbacks->undefined_symbol |
| 4772 | (info, bfd_elf_string_from_elf_section |
| 4773 | (input_bfd, symtab_hdr->sh_link, sym->st_name), |
| 4774 | input_bfd, input_section, rel->r_offset, TRUE)) |
| 4775 | return FALSE; |
| 4776 | } |
| 4777 | |
| 4778 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
| 4779 | |
| 4780 | /* Relocate against local STT_GNU_IFUNC symbol. */ |
| 4781 | if (!info->relocatable |
| 4782 | && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
| 4783 | { |
| 4784 | h = elfNN_aarch64_get_local_sym_hash (globals, input_bfd, |
| 4785 | rel, FALSE); |
| 4786 | if (h == NULL) |
| 4787 | abort (); |
| 4788 | |
| 4789 | /* Set STT_GNU_IFUNC symbol value. */ |
| 4790 | h->root.u.def.value = sym->st_value; |
| 4791 | h->root.u.def.section = sec; |
| 4792 | } |
| 4793 | } |
| 4794 | else |
| 4795 | { |
| 4796 | bfd_boolean warned, ignored; |
| 4797 | |
| 4798 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
| 4799 | r_symndx, symtab_hdr, sym_hashes, |
| 4800 | h, sec, relocation, |
| 4801 | unresolved_reloc, warned, ignored); |
| 4802 | |
| 4803 | sym_type = h->type; |
| 4804 | } |
| 4805 | |
| 4806 | if (sec != NULL && discarded_section (sec)) |
| 4807 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
| 4808 | rel, 1, relend, howto, 0, contents); |
| 4809 | |
| 4810 | if (info->relocatable) |
| 4811 | continue; |
| 4812 | |
| 4813 | if (h != NULL) |
| 4814 | name = h->root.root.string; |
| 4815 | else |
| 4816 | { |
| 4817 | name = (bfd_elf_string_from_elf_section |
| 4818 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); |
| 4819 | if (name == NULL || *name == '\0') |
| 4820 | name = bfd_section_name (input_bfd, sec); |
| 4821 | } |
| 4822 | |
| 4823 | if (r_symndx != 0 |
| 4824 | && r_type != R_AARCH64_NONE |
| 4825 | && r_type != R_AARCH64_NULL |
| 4826 | && (h == NULL |
| 4827 | || h->root.type == bfd_link_hash_defined |
| 4828 | || h->root.type == bfd_link_hash_defweak) |
| 4829 | && IS_AARCH64_TLS_RELOC (bfd_r_type) != (sym_type == STT_TLS)) |
| 4830 | { |
| 4831 | (*_bfd_error_handler) |
| 4832 | ((sym_type == STT_TLS |
| 4833 | ? _("%B(%A+0x%lx): %s used with TLS symbol %s") |
| 4834 | : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")), |
| 4835 | input_bfd, |
| 4836 | input_section, (long) rel->r_offset, howto->name, name); |
| 4837 | } |
| 4838 | |
| 4839 | /* We relax only if we can see that there can be a valid transition |
| 4840 | from a reloc type to another. |
| 4841 | We call elfNN_aarch64_final_link_relocate unless we're completely |
| 4842 | done, i.e., the relaxation produced the final output we want. */ |
| 4843 | |
| 4844 | relaxed_bfd_r_type = aarch64_tls_transition (input_bfd, info, r_type, |
| 4845 | h, r_symndx); |
| 4846 | if (relaxed_bfd_r_type != bfd_r_type) |
| 4847 | { |
| 4848 | bfd_r_type = relaxed_bfd_r_type; |
| 4849 | howto = elfNN_aarch64_howto_from_bfd_reloc (bfd_r_type); |
| 4850 | BFD_ASSERT (howto != NULL); |
| 4851 | r_type = howto->type; |
| 4852 | r = elfNN_aarch64_tls_relax (globals, input_bfd, contents, rel, h); |
| 4853 | unresolved_reloc = 0; |
| 4854 | } |
| 4855 | else |
| 4856 | r = bfd_reloc_continue; |
| 4857 | |
| 4858 | /* There may be multiple consecutive relocations for the |
| 4859 | same offset. In that case we are supposed to treat the |
| 4860 | output of each relocation as the addend for the next. */ |
| 4861 | if (rel + 1 < relend |
| 4862 | && rel->r_offset == rel[1].r_offset |
| 4863 | && ELFNN_R_TYPE (rel[1].r_info) != R_AARCH64_NONE |
| 4864 | && ELFNN_R_TYPE (rel[1].r_info) != R_AARCH64_NULL) |
| 4865 | save_addend = TRUE; |
| 4866 | else |
| 4867 | save_addend = FALSE; |
| 4868 | |
| 4869 | if (r == bfd_reloc_continue) |
| 4870 | r = elfNN_aarch64_final_link_relocate (howto, input_bfd, output_bfd, |
| 4871 | input_section, contents, rel, |
| 4872 | relocation, info, sec, |
| 4873 | h, &unresolved_reloc, |
| 4874 | save_addend, &addend, sym); |
| 4875 | |
| 4876 | switch (elfNN_aarch64_bfd_reloc_from_type (r_type)) |
| 4877 | { |
| 4878 | case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21: |
| 4879 | case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC: |
| 4880 | if (! symbol_got_offset_mark_p (input_bfd, h, r_symndx)) |
| 4881 | { |
| 4882 | bfd_boolean need_relocs = FALSE; |
| 4883 | bfd_byte *loc; |
| 4884 | int indx; |
| 4885 | bfd_vma off; |
| 4886 | |
| 4887 | off = symbol_got_offset (input_bfd, h, r_symndx); |
| 4888 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
| 4889 | |
| 4890 | need_relocs = |
| 4891 | (info->shared || indx != 0) && |
| 4892 | (h == NULL |
| 4893 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 4894 | || h->root.type != bfd_link_hash_undefweak); |
| 4895 | |
| 4896 | BFD_ASSERT (globals->root.srelgot != NULL); |
| 4897 | |
| 4898 | if (need_relocs) |
| 4899 | { |
| 4900 | Elf_Internal_Rela rela; |
| 4901 | rela.r_info = ELFNN_R_INFO (indx, AARCH64_R (TLS_DTPMOD)); |
| 4902 | rela.r_addend = 0; |
| 4903 | rela.r_offset = globals->root.sgot->output_section->vma + |
| 4904 | globals->root.sgot->output_offset + off; |
| 4905 | |
| 4906 | |
| 4907 | loc = globals->root.srelgot->contents; |
| 4908 | loc += globals->root.srelgot->reloc_count++ |
| 4909 | * RELOC_SIZE (htab); |
| 4910 | bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc); |
| 4911 | |
| 4912 | if (indx == 0) |
| 4913 | { |
| 4914 | bfd_put_NN (output_bfd, |
| 4915 | relocation - dtpoff_base (info), |
| 4916 | globals->root.sgot->contents + off |
| 4917 | + GOT_ENTRY_SIZE); |
| 4918 | } |
| 4919 | else |
| 4920 | { |
| 4921 | /* This TLS symbol is global. We emit a |
| 4922 | relocation to fixup the tls offset at load |
| 4923 | time. */ |
| 4924 | rela.r_info = |
| 4925 | ELFNN_R_INFO (indx, AARCH64_R (TLS_DTPREL)); |
| 4926 | rela.r_addend = 0; |
| 4927 | rela.r_offset = |
| 4928 | (globals->root.sgot->output_section->vma |
| 4929 | + globals->root.sgot->output_offset + off |
| 4930 | + GOT_ENTRY_SIZE); |
| 4931 | |
| 4932 | loc = globals->root.srelgot->contents; |
| 4933 | loc += globals->root.srelgot->reloc_count++ |
| 4934 | * RELOC_SIZE (globals); |
| 4935 | bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc); |
| 4936 | bfd_put_NN (output_bfd, (bfd_vma) 0, |
| 4937 | globals->root.sgot->contents + off |
| 4938 | + GOT_ENTRY_SIZE); |
| 4939 | } |
| 4940 | } |
| 4941 | else |
| 4942 | { |
| 4943 | bfd_put_NN (output_bfd, (bfd_vma) 1, |
| 4944 | globals->root.sgot->contents + off); |
| 4945 | bfd_put_NN (output_bfd, |
| 4946 | relocation - dtpoff_base (info), |
| 4947 | globals->root.sgot->contents + off |
| 4948 | + GOT_ENTRY_SIZE); |
| 4949 | } |
| 4950 | |
| 4951 | symbol_got_offset_mark (input_bfd, h, r_symndx); |
| 4952 | } |
| 4953 | break; |
| 4954 | |
| 4955 | case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: |
| 4956 | case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC: |
| 4957 | if (! symbol_got_offset_mark_p (input_bfd, h, r_symndx)) |
| 4958 | { |
| 4959 | bfd_boolean need_relocs = FALSE; |
| 4960 | bfd_byte *loc; |
| 4961 | int indx; |
| 4962 | bfd_vma off; |
| 4963 | |
| 4964 | off = symbol_got_offset (input_bfd, h, r_symndx); |
| 4965 | |
| 4966 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
| 4967 | |
| 4968 | need_relocs = |
| 4969 | (info->shared || indx != 0) && |
| 4970 | (h == NULL |
| 4971 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 4972 | || h->root.type != bfd_link_hash_undefweak); |
| 4973 | |
| 4974 | BFD_ASSERT (globals->root.srelgot != NULL); |
| 4975 | |
| 4976 | if (need_relocs) |
| 4977 | { |
| 4978 | Elf_Internal_Rela rela; |
| 4979 | |
| 4980 | if (indx == 0) |
| 4981 | rela.r_addend = relocation - dtpoff_base (info); |
| 4982 | else |
| 4983 | rela.r_addend = 0; |
| 4984 | |
| 4985 | rela.r_info = ELFNN_R_INFO (indx, AARCH64_R (TLS_TPREL)); |
| 4986 | rela.r_offset = globals->root.sgot->output_section->vma + |
| 4987 | globals->root.sgot->output_offset + off; |
| 4988 | |
| 4989 | loc = globals->root.srelgot->contents; |
| 4990 | loc += globals->root.srelgot->reloc_count++ |
| 4991 | * RELOC_SIZE (htab); |
| 4992 | |
| 4993 | bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc); |
| 4994 | |
| 4995 | bfd_put_NN (output_bfd, rela.r_addend, |
| 4996 | globals->root.sgot->contents + off); |
| 4997 | } |
| 4998 | else |
| 4999 | bfd_put_NN (output_bfd, relocation - tpoff_base (info), |
| 5000 | globals->root.sgot->contents + off); |
| 5001 | |
| 5002 | symbol_got_offset_mark (input_bfd, h, r_symndx); |
| 5003 | } |
| 5004 | break; |
| 5005 | |
| 5006 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12: |
| 5007 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12: |
| 5008 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC: |
| 5009 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2: |
| 5010 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1: |
| 5011 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC: |
| 5012 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0: |
| 5013 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC: |
| 5014 | break; |
| 5015 | |
| 5016 | case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC: |
| 5017 | case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21: |
| 5018 | case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC: |
| 5019 | if (! symbol_tlsdesc_got_offset_mark_p (input_bfd, h, r_symndx)) |
| 5020 | { |
| 5021 | bfd_boolean need_relocs = FALSE; |
| 5022 | int indx = h && h->dynindx != -1 ? h->dynindx : 0; |
| 5023 | bfd_vma off = symbol_tlsdesc_got_offset (input_bfd, h, r_symndx); |
| 5024 | |
| 5025 | need_relocs = (h == NULL |
| 5026 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 5027 | || h->root.type != bfd_link_hash_undefweak); |
| 5028 | |
| 5029 | BFD_ASSERT (globals->root.srelgot != NULL); |
| 5030 | BFD_ASSERT (globals->root.sgot != NULL); |
| 5031 | |
| 5032 | if (need_relocs) |
| 5033 | { |
| 5034 | bfd_byte *loc; |
| 5035 | Elf_Internal_Rela rela; |
| 5036 | rela.r_info = ELFNN_R_INFO (indx, AARCH64_R (TLSDESC)); |
| 5037 | |
| 5038 | rela.r_addend = 0; |
| 5039 | rela.r_offset = (globals->root.sgotplt->output_section->vma |
| 5040 | + globals->root.sgotplt->output_offset |
| 5041 | + off + globals->sgotplt_jump_table_size); |
| 5042 | |
| 5043 | if (indx == 0) |
| 5044 | rela.r_addend = relocation - dtpoff_base (info); |
| 5045 | |
| 5046 | /* Allocate the next available slot in the PLT reloc |
| 5047 | section to hold our R_AARCH64_TLSDESC, the next |
| 5048 | available slot is determined from reloc_count, |
| 5049 | which we step. But note, reloc_count was |
| 5050 | artifically moved down while allocating slots for |
| 5051 | real PLT relocs such that all of the PLT relocs |
| 5052 | will fit above the initial reloc_count and the |
| 5053 | extra stuff will fit below. */ |
| 5054 | loc = globals->root.srelplt->contents; |
| 5055 | loc += globals->root.srelplt->reloc_count++ |
| 5056 | * RELOC_SIZE (globals); |
| 5057 | |
| 5058 | bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc); |
| 5059 | |
| 5060 | bfd_put_NN (output_bfd, (bfd_vma) 0, |
| 5061 | globals->root.sgotplt->contents + off + |
| 5062 | globals->sgotplt_jump_table_size); |
| 5063 | bfd_put_NN (output_bfd, (bfd_vma) 0, |
| 5064 | globals->root.sgotplt->contents + off + |
| 5065 | globals->sgotplt_jump_table_size + |
| 5066 | GOT_ENTRY_SIZE); |
| 5067 | } |
| 5068 | |
| 5069 | symbol_tlsdesc_got_offset_mark (input_bfd, h, r_symndx); |
| 5070 | } |
| 5071 | break; |
| 5072 | default: |
| 5073 | break; |
| 5074 | } |
| 5075 | |
| 5076 | if (!save_addend) |
| 5077 | addend = 0; |
| 5078 | |
| 5079 | |
| 5080 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
| 5081 | because such sections are not SEC_ALLOC and thus ld.so will |
| 5082 | not process them. */ |
| 5083 | if (unresolved_reloc |
| 5084 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
| 5085 | && h->def_dynamic) |
| 5086 | && _bfd_elf_section_offset (output_bfd, info, input_section, |
| 5087 | +rel->r_offset) != (bfd_vma) - 1) |
| 5088 | { |
| 5089 | (*_bfd_error_handler) |
| 5090 | (_ |
| 5091 | ("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), |
| 5092 | input_bfd, input_section, (long) rel->r_offset, howto->name, |
| 5093 | h->root.root.string); |
| 5094 | return FALSE; |
| 5095 | } |
| 5096 | |
| 5097 | if (r != bfd_reloc_ok && r != bfd_reloc_continue) |
| 5098 | { |
| 5099 | switch (r) |
| 5100 | { |
| 5101 | case bfd_reloc_overflow: |
| 5102 | /* If the overflowing reloc was to an undefined symbol, |
| 5103 | we have already printed one error message and there |
| 5104 | is no point complaining again. */ |
| 5105 | if ((!h || |
| 5106 | h->root.type != bfd_link_hash_undefined) |
| 5107 | && (!((*info->callbacks->reloc_overflow) |
| 5108 | (info, (h ? &h->root : NULL), name, howto->name, |
| 5109 | (bfd_vma) 0, input_bfd, input_section, |
| 5110 | rel->r_offset)))) |
| 5111 | return FALSE; |
| 5112 | break; |
| 5113 | |
| 5114 | case bfd_reloc_undefined: |
| 5115 | if (!((*info->callbacks->undefined_symbol) |
| 5116 | (info, name, input_bfd, input_section, |
| 5117 | rel->r_offset, TRUE))) |
| 5118 | return FALSE; |
| 5119 | break; |
| 5120 | |
| 5121 | case bfd_reloc_outofrange: |
| 5122 | error_message = _("out of range"); |
| 5123 | goto common_error; |
| 5124 | |
| 5125 | case bfd_reloc_notsupported: |
| 5126 | error_message = _("unsupported relocation"); |
| 5127 | goto common_error; |
| 5128 | |
| 5129 | case bfd_reloc_dangerous: |
| 5130 | /* error_message should already be set. */ |
| 5131 | goto common_error; |
| 5132 | |
| 5133 | default: |
| 5134 | error_message = _("unknown error"); |
| 5135 | /* Fall through. */ |
| 5136 | |
| 5137 | common_error: |
| 5138 | BFD_ASSERT (error_message != NULL); |
| 5139 | if (!((*info->callbacks->reloc_dangerous) |
| 5140 | (info, error_message, input_bfd, input_section, |
| 5141 | rel->r_offset))) |
| 5142 | return FALSE; |
| 5143 | break; |
| 5144 | } |
| 5145 | } |
| 5146 | } |
| 5147 | |
| 5148 | return TRUE; |
| 5149 | } |
| 5150 | |
| 5151 | /* Set the right machine number. */ |
| 5152 | |
| 5153 | static bfd_boolean |
| 5154 | elfNN_aarch64_object_p (bfd *abfd) |
| 5155 | { |
| 5156 | #if ARCH_SIZE == 32 |
| 5157 | bfd_default_set_arch_mach (abfd, bfd_arch_aarch64, bfd_mach_aarch64_ilp32); |
| 5158 | #else |
| 5159 | bfd_default_set_arch_mach (abfd, bfd_arch_aarch64, bfd_mach_aarch64); |
| 5160 | #endif |
| 5161 | return TRUE; |
| 5162 | } |
| 5163 | |
| 5164 | /* Function to keep AArch64 specific flags in the ELF header. */ |
| 5165 | |
| 5166 | static bfd_boolean |
| 5167 | elfNN_aarch64_set_private_flags (bfd *abfd, flagword flags) |
| 5168 | { |
| 5169 | if (elf_flags_init (abfd) && elf_elfheader (abfd)->e_flags != flags) |
| 5170 | { |
| 5171 | } |
| 5172 | else |
| 5173 | { |
| 5174 | elf_elfheader (abfd)->e_flags = flags; |
| 5175 | elf_flags_init (abfd) = TRUE; |
| 5176 | } |
| 5177 | |
| 5178 | return TRUE; |
| 5179 | } |
| 5180 | |
| 5181 | /* Merge backend specific data from an object file to the output |
| 5182 | object file when linking. */ |
| 5183 | |
| 5184 | static bfd_boolean |
| 5185 | elfNN_aarch64_merge_private_bfd_data (bfd *ibfd, bfd *obfd) |
| 5186 | { |
| 5187 | flagword out_flags; |
| 5188 | flagword in_flags; |
| 5189 | bfd_boolean flags_compatible = TRUE; |
| 5190 | asection *sec; |
| 5191 | |
| 5192 | /* Check if we have the same endianess. */ |
| 5193 | if (!_bfd_generic_verify_endian_match (ibfd, obfd)) |
| 5194 | return FALSE; |
| 5195 | |
| 5196 | if (!is_aarch64_elf (ibfd) || !is_aarch64_elf (obfd)) |
| 5197 | return TRUE; |
| 5198 | |
| 5199 | /* The input BFD must have had its flags initialised. */ |
| 5200 | /* The following seems bogus to me -- The flags are initialized in |
| 5201 | the assembler but I don't think an elf_flags_init field is |
| 5202 | written into the object. */ |
| 5203 | /* BFD_ASSERT (elf_flags_init (ibfd)); */ |
| 5204 | |
| 5205 | in_flags = elf_elfheader (ibfd)->e_flags; |
| 5206 | out_flags = elf_elfheader (obfd)->e_flags; |
| 5207 | |
| 5208 | if (!elf_flags_init (obfd)) |
| 5209 | { |
| 5210 | /* If the input is the default architecture and had the default |
| 5211 | flags then do not bother setting the flags for the output |
| 5212 | architecture, instead allow future merges to do this. If no |
| 5213 | future merges ever set these flags then they will retain their |
| 5214 | uninitialised values, which surprise surprise, correspond |
| 5215 | to the default values. */ |
| 5216 | if (bfd_get_arch_info (ibfd)->the_default |
| 5217 | && elf_elfheader (ibfd)->e_flags == 0) |
| 5218 | return TRUE; |
| 5219 | |
| 5220 | elf_flags_init (obfd) = TRUE; |
| 5221 | elf_elfheader (obfd)->e_flags = in_flags; |
| 5222 | |
| 5223 | if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) |
| 5224 | && bfd_get_arch_info (obfd)->the_default) |
| 5225 | return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), |
| 5226 | bfd_get_mach (ibfd)); |
| 5227 | |
| 5228 | return TRUE; |
| 5229 | } |
| 5230 | |
| 5231 | /* Identical flags must be compatible. */ |
| 5232 | if (in_flags == out_flags) |
| 5233 | return TRUE; |
| 5234 | |
| 5235 | /* Check to see if the input BFD actually contains any sections. If |
| 5236 | not, its flags may not have been initialised either, but it |
| 5237 | cannot actually cause any incompatiblity. Do not short-circuit |
| 5238 | dynamic objects; their section list may be emptied by |
| 5239 | elf_link_add_object_symbols. |
| 5240 | |
| 5241 | Also check to see if there are no code sections in the input. |
| 5242 | In this case there is no need to check for code specific flags. |
| 5243 | XXX - do we need to worry about floating-point format compatability |
| 5244 | in data sections ? */ |
| 5245 | if (!(ibfd->flags & DYNAMIC)) |
| 5246 | { |
| 5247 | bfd_boolean null_input_bfd = TRUE; |
| 5248 | bfd_boolean only_data_sections = TRUE; |
| 5249 | |
| 5250 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) |
| 5251 | { |
| 5252 | if ((bfd_get_section_flags (ibfd, sec) |
| 5253 | & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)) |
| 5254 | == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)) |
| 5255 | only_data_sections = FALSE; |
| 5256 | |
| 5257 | null_input_bfd = FALSE; |
| 5258 | break; |
| 5259 | } |
| 5260 | |
| 5261 | if (null_input_bfd || only_data_sections) |
| 5262 | return TRUE; |
| 5263 | } |
| 5264 | |
| 5265 | return flags_compatible; |
| 5266 | } |
| 5267 | |
| 5268 | /* Display the flags field. */ |
| 5269 | |
| 5270 | static bfd_boolean |
| 5271 | elfNN_aarch64_print_private_bfd_data (bfd *abfd, void *ptr) |
| 5272 | { |
| 5273 | FILE *file = (FILE *) ptr; |
| 5274 | unsigned long flags; |
| 5275 | |
| 5276 | BFD_ASSERT (abfd != NULL && ptr != NULL); |
| 5277 | |
| 5278 | /* Print normal ELF private data. */ |
| 5279 | _bfd_elf_print_private_bfd_data (abfd, ptr); |
| 5280 | |
| 5281 | flags = elf_elfheader (abfd)->e_flags; |
| 5282 | /* Ignore init flag - it may not be set, despite the flags field |
| 5283 | containing valid data. */ |
| 5284 | |
| 5285 | /* xgettext:c-format */ |
| 5286 | fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); |
| 5287 | |
| 5288 | if (flags) |
| 5289 | fprintf (file, _("<Unrecognised flag bits set>")); |
| 5290 | |
| 5291 | fputc ('\n', file); |
| 5292 | |
| 5293 | return TRUE; |
| 5294 | } |
| 5295 | |
| 5296 | /* Update the got entry reference counts for the section being removed. */ |
| 5297 | |
| 5298 | static bfd_boolean |
| 5299 | elfNN_aarch64_gc_sweep_hook (bfd *abfd, |
| 5300 | struct bfd_link_info *info, |
| 5301 | asection *sec, |
| 5302 | const Elf_Internal_Rela * relocs) |
| 5303 | { |
| 5304 | struct elf_aarch64_link_hash_table *htab; |
| 5305 | Elf_Internal_Shdr *symtab_hdr; |
| 5306 | struct elf_link_hash_entry **sym_hashes; |
| 5307 | struct elf_aarch64_local_symbol *locals; |
| 5308 | const Elf_Internal_Rela *rel, *relend; |
| 5309 | |
| 5310 | if (info->relocatable) |
| 5311 | return TRUE; |
| 5312 | |
| 5313 | htab = elf_aarch64_hash_table (info); |
| 5314 | |
| 5315 | if (htab == NULL) |
| 5316 | return FALSE; |
| 5317 | |
| 5318 | elf_section_data (sec)->local_dynrel = NULL; |
| 5319 | |
| 5320 | symtab_hdr = &elf_symtab_hdr (abfd); |
| 5321 | sym_hashes = elf_sym_hashes (abfd); |
| 5322 | |
| 5323 | locals = elf_aarch64_locals (abfd); |
| 5324 | |
| 5325 | relend = relocs + sec->reloc_count; |
| 5326 | for (rel = relocs; rel < relend; rel++) |
| 5327 | { |
| 5328 | unsigned long r_symndx; |
| 5329 | unsigned int r_type; |
| 5330 | struct elf_link_hash_entry *h = NULL; |
| 5331 | |
| 5332 | r_symndx = ELFNN_R_SYM (rel->r_info); |
| 5333 | |
| 5334 | if (r_symndx >= symtab_hdr->sh_info) |
| 5335 | { |
| 5336 | |
| 5337 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 5338 | while (h->root.type == bfd_link_hash_indirect |
| 5339 | || h->root.type == bfd_link_hash_warning) |
| 5340 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 5341 | } |
| 5342 | else |
| 5343 | { |
| 5344 | Elf_Internal_Sym *isym; |
| 5345 | |
| 5346 | /* A local symbol. */ |
| 5347 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
| 5348 | abfd, r_symndx); |
| 5349 | |
| 5350 | /* Check relocation against local STT_GNU_IFUNC symbol. */ |
| 5351 | if (isym != NULL |
| 5352 | && ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
| 5353 | { |
| 5354 | h = elfNN_aarch64_get_local_sym_hash (htab, abfd, rel, FALSE); |
| 5355 | if (h == NULL) |
| 5356 | abort (); |
| 5357 | } |
| 5358 | } |
| 5359 | |
| 5360 | if (h) |
| 5361 | { |
| 5362 | struct elf_aarch64_link_hash_entry *eh; |
| 5363 | struct elf_dyn_relocs **pp; |
| 5364 | struct elf_dyn_relocs *p; |
| 5365 | |
| 5366 | eh = (struct elf_aarch64_link_hash_entry *) h; |
| 5367 | |
| 5368 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) |
| 5369 | if (p->sec == sec) |
| 5370 | { |
| 5371 | /* Everything must go for SEC. */ |
| 5372 | *pp = p->next; |
| 5373 | break; |
| 5374 | } |
| 5375 | } |
| 5376 | |
| 5377 | r_type = ELFNN_R_TYPE (rel->r_info); |
| 5378 | switch (aarch64_tls_transition (abfd,info, r_type, h ,r_symndx)) |
| 5379 | { |
| 5380 | case BFD_RELOC_AARCH64_ADR_GOT_PAGE: |
| 5381 | case BFD_RELOC_AARCH64_GOT_LD_PREL19: |
| 5382 | case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC: |
| 5383 | case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC: |
| 5384 | case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC: |
| 5385 | case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21: |
| 5386 | case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC: |
| 5387 | case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC: |
| 5388 | case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC: |
| 5389 | case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21: |
| 5390 | case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: |
| 5391 | case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC: |
| 5392 | case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: |
| 5393 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12: |
| 5394 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12: |
| 5395 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC: |
| 5396 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0: |
| 5397 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC: |
| 5398 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1: |
| 5399 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC: |
| 5400 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2: |
| 5401 | if (h != NULL) |
| 5402 | { |
| 5403 | if (h->got.refcount > 0) |
| 5404 | h->got.refcount -= 1; |
| 5405 | |
| 5406 | if (h->type == STT_GNU_IFUNC) |
| 5407 | { |
| 5408 | if (h->plt.refcount > 0) |
| 5409 | h->plt.refcount -= 1; |
| 5410 | } |
| 5411 | } |
| 5412 | else if (locals != NULL) |
| 5413 | { |
| 5414 | if (locals[r_symndx].got_refcount > 0) |
| 5415 | locals[r_symndx].got_refcount -= 1; |
| 5416 | } |
| 5417 | break; |
| 5418 | |
| 5419 | case BFD_RELOC_AARCH64_CALL26: |
| 5420 | case BFD_RELOC_AARCH64_JUMP26: |
| 5421 | /* If this is a local symbol then we resolve it |
| 5422 | directly without creating a PLT entry. */ |
| 5423 | if (h == NULL) |
| 5424 | continue; |
| 5425 | |
| 5426 | if (h->plt.refcount > 0) |
| 5427 | h->plt.refcount -= 1; |
| 5428 | break; |
| 5429 | |
| 5430 | case BFD_RELOC_AARCH64_MOVW_G0_NC: |
| 5431 | case BFD_RELOC_AARCH64_MOVW_G1_NC: |
| 5432 | case BFD_RELOC_AARCH64_MOVW_G2_NC: |
| 5433 | case BFD_RELOC_AARCH64_MOVW_G3: |
| 5434 | case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL: |
| 5435 | case BFD_RELOC_AARCH64_ADR_HI21_PCREL: |
| 5436 | case BFD_RELOC_AARCH64_ADR_LO21_PCREL: |
| 5437 | case BFD_RELOC_AARCH64_NN: |
| 5438 | if (h != NULL && info->executable) |
| 5439 | { |
| 5440 | if (h->plt.refcount > 0) |
| 5441 | h->plt.refcount -= 1; |
| 5442 | } |
| 5443 | break; |
| 5444 | |
| 5445 | default: |
| 5446 | break; |
| 5447 | } |
| 5448 | } |
| 5449 | |
| 5450 | return TRUE; |
| 5451 | } |
| 5452 | |
| 5453 | /* Adjust a symbol defined by a dynamic object and referenced by a |
| 5454 | regular object. The current definition is in some section of the |
| 5455 | dynamic object, but we're not including those sections. We have to |
| 5456 | change the definition to something the rest of the link can |
| 5457 | understand. */ |
| 5458 | |
| 5459 | static bfd_boolean |
| 5460 | elfNN_aarch64_adjust_dynamic_symbol (struct bfd_link_info *info, |
| 5461 | struct elf_link_hash_entry *h) |
| 5462 | { |
| 5463 | struct elf_aarch64_link_hash_table *htab; |
| 5464 | asection *s; |
| 5465 | |
| 5466 | /* If this is a function, put it in the procedure linkage table. We |
| 5467 | will fill in the contents of the procedure linkage table later, |
| 5468 | when we know the address of the .got section. */ |
| 5469 | if (h->type == STT_FUNC || h->type == STT_GNU_IFUNC || h->needs_plt) |
| 5470 | { |
| 5471 | if (h->plt.refcount <= 0 |
| 5472 | || (h->type != STT_GNU_IFUNC |
| 5473 | && (SYMBOL_CALLS_LOCAL (info, h) |
| 5474 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
| 5475 | && h->root.type == bfd_link_hash_undefweak)))) |
| 5476 | { |
| 5477 | /* This case can occur if we saw a CALL26 reloc in |
| 5478 | an input file, but the symbol wasn't referred to |
| 5479 | by a dynamic object or all references were |
| 5480 | garbage collected. In which case we can end up |
| 5481 | resolving. */ |
| 5482 | h->plt.offset = (bfd_vma) - 1; |
| 5483 | h->needs_plt = 0; |
| 5484 | } |
| 5485 | |
| 5486 | return TRUE; |
| 5487 | } |
| 5488 | else |
| 5489 | /* It's possible that we incorrectly decided a .plt reloc was |
| 5490 | needed for an R_X86_64_PC32 reloc to a non-function sym in |
| 5491 | check_relocs. We can't decide accurately between function and |
| 5492 | non-function syms in check-relocs; Objects loaded later in |
| 5493 | the link may change h->type. So fix it now. */ |
| 5494 | h->plt.offset = (bfd_vma) - 1; |
| 5495 | |
| 5496 | |
| 5497 | /* If this is a weak symbol, and there is a real definition, the |
| 5498 | processor independent code will have arranged for us to see the |
| 5499 | real definition first, and we can just use the same value. */ |
| 5500 | if (h->u.weakdef != NULL) |
| 5501 | { |
| 5502 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
| 5503 | || h->u.weakdef->root.type == bfd_link_hash_defweak); |
| 5504 | h->root.u.def.section = h->u.weakdef->root.u.def.section; |
| 5505 | h->root.u.def.value = h->u.weakdef->root.u.def.value; |
| 5506 | if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) |
| 5507 | h->non_got_ref = h->u.weakdef->non_got_ref; |
| 5508 | return TRUE; |
| 5509 | } |
| 5510 | |
| 5511 | /* If we are creating a shared library, we must presume that the |
| 5512 | only references to the symbol are via the global offset table. |
| 5513 | For such cases we need not do anything here; the relocations will |
| 5514 | be handled correctly by relocate_section. */ |
| 5515 | if (info->shared) |
| 5516 | return TRUE; |
| 5517 | |
| 5518 | /* If there are no references to this symbol that do not use the |
| 5519 | GOT, we don't need to generate a copy reloc. */ |
| 5520 | if (!h->non_got_ref) |
| 5521 | return TRUE; |
| 5522 | |
| 5523 | /* If -z nocopyreloc was given, we won't generate them either. */ |
| 5524 | if (info->nocopyreloc) |
| 5525 | { |
| 5526 | h->non_got_ref = 0; |
| 5527 | return TRUE; |
| 5528 | } |
| 5529 | |
| 5530 | /* We must allocate the symbol in our .dynbss section, which will |
| 5531 | become part of the .bss section of the executable. There will be |
| 5532 | an entry for this symbol in the .dynsym section. The dynamic |
| 5533 | object will contain position independent code, so all references |
| 5534 | from the dynamic object to this symbol will go through the global |
| 5535 | offset table. The dynamic linker will use the .dynsym entry to |
| 5536 | determine the address it must put in the global offset table, so |
| 5537 | both the dynamic object and the regular object will refer to the |
| 5538 | same memory location for the variable. */ |
| 5539 | |
| 5540 | htab = elf_aarch64_hash_table (info); |
| 5541 | |
| 5542 | /* We must generate a R_AARCH64_COPY reloc to tell the dynamic linker |
| 5543 | to copy the initial value out of the dynamic object and into the |
| 5544 | runtime process image. */ |
| 5545 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) |
| 5546 | { |
| 5547 | htab->srelbss->size += RELOC_SIZE (htab); |
| 5548 | h->needs_copy = 1; |
| 5549 | } |
| 5550 | |
| 5551 | s = htab->sdynbss; |
| 5552 | |
| 5553 | return _bfd_elf_adjust_dynamic_copy (info, h, s); |
| 5554 | |
| 5555 | } |
| 5556 | |
| 5557 | static bfd_boolean |
| 5558 | elfNN_aarch64_allocate_local_symbols (bfd *abfd, unsigned number) |
| 5559 | { |
| 5560 | struct elf_aarch64_local_symbol *locals; |
| 5561 | locals = elf_aarch64_locals (abfd); |
| 5562 | if (locals == NULL) |
| 5563 | { |
| 5564 | locals = (struct elf_aarch64_local_symbol *) |
| 5565 | bfd_zalloc (abfd, number * sizeof (struct elf_aarch64_local_symbol)); |
| 5566 | if (locals == NULL) |
| 5567 | return FALSE; |
| 5568 | elf_aarch64_locals (abfd) = locals; |
| 5569 | } |
| 5570 | return TRUE; |
| 5571 | } |
| 5572 | |
| 5573 | /* Create the .got section to hold the global offset table. */ |
| 5574 | |
| 5575 | static bfd_boolean |
| 5576 | aarch64_elf_create_got_section (bfd *abfd, struct bfd_link_info *info) |
| 5577 | { |
| 5578 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
| 5579 | flagword flags; |
| 5580 | asection *s; |
| 5581 | struct elf_link_hash_entry *h; |
| 5582 | struct elf_link_hash_table *htab = elf_hash_table (info); |
| 5583 | |
| 5584 | /* This function may be called more than once. */ |
| 5585 | s = bfd_get_linker_section (abfd, ".got"); |
| 5586 | if (s != NULL) |
| 5587 | return TRUE; |
| 5588 | |
| 5589 | flags = bed->dynamic_sec_flags; |
| 5590 | |
| 5591 | s = bfd_make_section_anyway_with_flags (abfd, |
| 5592 | (bed->rela_plts_and_copies_p |
| 5593 | ? ".rela.got" : ".rel.got"), |
| 5594 | (bed->dynamic_sec_flags |
| 5595 | | SEC_READONLY)); |
| 5596 | if (s == NULL |
| 5597 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
| 5598 | return FALSE; |
| 5599 | htab->srelgot = s; |
| 5600 | |
| 5601 | s = bfd_make_section_anyway_with_flags (abfd, ".got", flags); |
| 5602 | if (s == NULL |
| 5603 | || !bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
| 5604 | return FALSE; |
| 5605 | htab->sgot = s; |
| 5606 | htab->sgot->size += GOT_ENTRY_SIZE; |
| 5607 | |
| 5608 | if (bed->want_got_sym) |
| 5609 | { |
| 5610 | /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got |
| 5611 | (or .got.plt) section. We don't do this in the linker script |
| 5612 | because we don't want to define the symbol if we are not creating |
| 5613 | a global offset table. */ |
| 5614 | h = _bfd_elf_define_linkage_sym (abfd, info, s, |
| 5615 | "_GLOBAL_OFFSET_TABLE_"); |
| 5616 | elf_hash_table (info)->hgot = h; |
| 5617 | if (h == NULL) |
| 5618 | return FALSE; |
| 5619 | } |
| 5620 | |
| 5621 | if (bed->want_got_plt) |
| 5622 | { |
| 5623 | s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags); |
| 5624 | if (s == NULL |
| 5625 | || !bfd_set_section_alignment (abfd, s, |
| 5626 | bed->s->log_file_align)) |
| 5627 | return FALSE; |
| 5628 | htab->sgotplt = s; |
| 5629 | } |
| 5630 | |
| 5631 | /* The first bit of the global offset table is the header. */ |
| 5632 | s->size += bed->got_header_size; |
| 5633 | |
| 5634 | return TRUE; |
| 5635 | } |
| 5636 | |
| 5637 | /* Look through the relocs for a section during the first phase. */ |
| 5638 | |
| 5639 | static bfd_boolean |
| 5640 | elfNN_aarch64_check_relocs (bfd *abfd, struct bfd_link_info *info, |
| 5641 | asection *sec, const Elf_Internal_Rela *relocs) |
| 5642 | { |
| 5643 | Elf_Internal_Shdr *symtab_hdr; |
| 5644 | struct elf_link_hash_entry **sym_hashes; |
| 5645 | const Elf_Internal_Rela *rel; |
| 5646 | const Elf_Internal_Rela *rel_end; |
| 5647 | asection *sreloc; |
| 5648 | |
| 5649 | struct elf_aarch64_link_hash_table *htab; |
| 5650 | |
| 5651 | if (info->relocatable) |
| 5652 | return TRUE; |
| 5653 | |
| 5654 | BFD_ASSERT (is_aarch64_elf (abfd)); |
| 5655 | |
| 5656 | htab = elf_aarch64_hash_table (info); |
| 5657 | sreloc = NULL; |
| 5658 | |
| 5659 | symtab_hdr = &elf_symtab_hdr (abfd); |
| 5660 | sym_hashes = elf_sym_hashes (abfd); |
| 5661 | |
| 5662 | rel_end = relocs + sec->reloc_count; |
| 5663 | for (rel = relocs; rel < rel_end; rel++) |
| 5664 | { |
| 5665 | struct elf_link_hash_entry *h; |
| 5666 | unsigned long r_symndx; |
| 5667 | unsigned int r_type; |
| 5668 | bfd_reloc_code_real_type bfd_r_type; |
| 5669 | Elf_Internal_Sym *isym; |
| 5670 | |
| 5671 | r_symndx = ELFNN_R_SYM (rel->r_info); |
| 5672 | r_type = ELFNN_R_TYPE (rel->r_info); |
| 5673 | |
| 5674 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) |
| 5675 | { |
| 5676 | (*_bfd_error_handler) (_("%B: bad symbol index: %d"), abfd, |
| 5677 | r_symndx); |
| 5678 | return FALSE; |
| 5679 | } |
| 5680 | |
| 5681 | if (r_symndx < symtab_hdr->sh_info) |
| 5682 | { |
| 5683 | /* A local symbol. */ |
| 5684 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
| 5685 | abfd, r_symndx); |
| 5686 | if (isym == NULL) |
| 5687 | return FALSE; |
| 5688 | |
| 5689 | /* Check relocation against local STT_GNU_IFUNC symbol. */ |
| 5690 | if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
| 5691 | { |
| 5692 | h = elfNN_aarch64_get_local_sym_hash (htab, abfd, rel, |
| 5693 | TRUE); |
| 5694 | if (h == NULL) |
| 5695 | return FALSE; |
| 5696 | |
| 5697 | /* Fake a STT_GNU_IFUNC symbol. */ |
| 5698 | h->type = STT_GNU_IFUNC; |
| 5699 | h->def_regular = 1; |
| 5700 | h->ref_regular = 1; |
| 5701 | h->forced_local = 1; |
| 5702 | h->root.type = bfd_link_hash_defined; |
| 5703 | } |
| 5704 | else |
| 5705 | h = NULL; |
| 5706 | } |
| 5707 | else |
| 5708 | { |
| 5709 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 5710 | while (h->root.type == bfd_link_hash_indirect |
| 5711 | || h->root.type == bfd_link_hash_warning) |
| 5712 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 5713 | |
| 5714 | /* PR15323, ref flags aren't set for references in the same |
| 5715 | object. */ |
| 5716 | h->root.non_ir_ref = 1; |
| 5717 | } |
| 5718 | |
| 5719 | /* Could be done earlier, if h were already available. */ |
| 5720 | bfd_r_type = aarch64_tls_transition (abfd, info, r_type, h, r_symndx); |
| 5721 | |
| 5722 | if (h != NULL) |
| 5723 | { |
| 5724 | /* Create the ifunc sections for static executables. If we |
| 5725 | never see an indirect function symbol nor we are building |
| 5726 | a static executable, those sections will be empty and |
| 5727 | won't appear in output. */ |
| 5728 | switch (bfd_r_type) |
| 5729 | { |
| 5730 | default: |
| 5731 | break; |
| 5732 | |
| 5733 | case BFD_RELOC_AARCH64_NN: |
| 5734 | case BFD_RELOC_AARCH64_CALL26: |
| 5735 | case BFD_RELOC_AARCH64_JUMP26: |
| 5736 | case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC: |
| 5737 | case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC: |
| 5738 | case BFD_RELOC_AARCH64_ADR_GOT_PAGE: |
| 5739 | case BFD_RELOC_AARCH64_GOT_LD_PREL19: |
| 5740 | case BFD_RELOC_AARCH64_ADR_HI21_PCREL: |
| 5741 | case BFD_RELOC_AARCH64_ADD_LO12: |
| 5742 | if (htab->root.dynobj == NULL) |
| 5743 | htab->root.dynobj = abfd; |
| 5744 | if (!_bfd_elf_create_ifunc_sections (htab->root.dynobj, info)) |
| 5745 | return FALSE; |
| 5746 | break; |
| 5747 | } |
| 5748 | |
| 5749 | /* It is referenced by a non-shared object. */ |
| 5750 | h->ref_regular = 1; |
| 5751 | h->root.non_ir_ref = 1; |
| 5752 | } |
| 5753 | |
| 5754 | switch (bfd_r_type) |
| 5755 | { |
| 5756 | case BFD_RELOC_AARCH64_NN: |
| 5757 | |
| 5758 | /* We don't need to handle relocs into sections not going into |
| 5759 | the "real" output. */ |
| 5760 | if ((sec->flags & SEC_ALLOC) == 0) |
| 5761 | break; |
| 5762 | |
| 5763 | if (h != NULL) |
| 5764 | { |
| 5765 | if (!info->shared) |
| 5766 | h->non_got_ref = 1; |
| 5767 | |
| 5768 | h->plt.refcount += 1; |
| 5769 | h->pointer_equality_needed = 1; |
| 5770 | } |
| 5771 | |
| 5772 | /* No need to do anything if we're not creating a shared |
| 5773 | object. */ |
| 5774 | if (! info->shared) |
| 5775 | break; |
| 5776 | |
| 5777 | { |
| 5778 | struct elf_dyn_relocs *p; |
| 5779 | struct elf_dyn_relocs **head; |
| 5780 | |
| 5781 | /* We must copy these reloc types into the output file. |
| 5782 | Create a reloc section in dynobj and make room for |
| 5783 | this reloc. */ |
| 5784 | if (sreloc == NULL) |
| 5785 | { |
| 5786 | if (htab->root.dynobj == NULL) |
| 5787 | htab->root.dynobj = abfd; |
| 5788 | |
| 5789 | sreloc = _bfd_elf_make_dynamic_reloc_section |
| 5790 | (sec, htab->root.dynobj, LOG_FILE_ALIGN, abfd, /*rela? */ TRUE); |
| 5791 | |
| 5792 | if (sreloc == NULL) |
| 5793 | return FALSE; |
| 5794 | } |
| 5795 | |
| 5796 | /* If this is a global symbol, we count the number of |
| 5797 | relocations we need for this symbol. */ |
| 5798 | if (h != NULL) |
| 5799 | { |
| 5800 | struct elf_aarch64_link_hash_entry *eh; |
| 5801 | eh = (struct elf_aarch64_link_hash_entry *) h; |
| 5802 | head = &eh->dyn_relocs; |
| 5803 | } |
| 5804 | else |
| 5805 | { |
| 5806 | /* Track dynamic relocs needed for local syms too. |
| 5807 | We really need local syms available to do this |
| 5808 | easily. Oh well. */ |
| 5809 | |
| 5810 | asection *s; |
| 5811 | void **vpp; |
| 5812 | |
| 5813 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
| 5814 | abfd, r_symndx); |
| 5815 | if (isym == NULL) |
| 5816 | return FALSE; |
| 5817 | |
| 5818 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); |
| 5819 | if (s == NULL) |
| 5820 | s = sec; |
| 5821 | |
| 5822 | /* Beware of type punned pointers vs strict aliasing |
| 5823 | rules. */ |
| 5824 | vpp = &(elf_section_data (s)->local_dynrel); |
| 5825 | head = (struct elf_dyn_relocs **) vpp; |
| 5826 | } |
| 5827 | |
| 5828 | p = *head; |
| 5829 | if (p == NULL || p->sec != sec) |
| 5830 | { |
| 5831 | bfd_size_type amt = sizeof *p; |
| 5832 | p = ((struct elf_dyn_relocs *) |
| 5833 | bfd_zalloc (htab->root.dynobj, amt)); |
| 5834 | if (p == NULL) |
| 5835 | return FALSE; |
| 5836 | p->next = *head; |
| 5837 | *head = p; |
| 5838 | p->sec = sec; |
| 5839 | } |
| 5840 | |
| 5841 | p->count += 1; |
| 5842 | |
| 5843 | } |
| 5844 | break; |
| 5845 | |
| 5846 | /* RR: We probably want to keep a consistency check that |
| 5847 | there are no dangling GOT_PAGE relocs. */ |
| 5848 | case BFD_RELOC_AARCH64_ADR_GOT_PAGE: |
| 5849 | case BFD_RELOC_AARCH64_GOT_LD_PREL19: |
| 5850 | case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC: |
| 5851 | case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC: |
| 5852 | case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC: |
| 5853 | case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21: |
| 5854 | case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC: |
| 5855 | case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC: |
| 5856 | case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC: |
| 5857 | case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21: |
| 5858 | case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: |
| 5859 | case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC: |
| 5860 | case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: |
| 5861 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12: |
| 5862 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12: |
| 5863 | case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC: |
| 5864 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0: |
| 5865 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC: |
| 5866 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1: |
| 5867 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC: |
| 5868 | case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2: |
| 5869 | { |
| 5870 | unsigned got_type; |
| 5871 | unsigned old_got_type; |
| 5872 | |
| 5873 | got_type = aarch64_reloc_got_type (bfd_r_type); |
| 5874 | |
| 5875 | if (h) |
| 5876 | { |
| 5877 | h->got.refcount += 1; |
| 5878 | old_got_type = elf_aarch64_hash_entry (h)->got_type; |
| 5879 | } |
| 5880 | else |
| 5881 | { |
| 5882 | struct elf_aarch64_local_symbol *locals; |
| 5883 | |
| 5884 | if (!elfNN_aarch64_allocate_local_symbols |
| 5885 | (abfd, symtab_hdr->sh_info)) |
| 5886 | return FALSE; |
| 5887 | |
| 5888 | locals = elf_aarch64_locals (abfd); |
| 5889 | BFD_ASSERT (r_symndx < symtab_hdr->sh_info); |
| 5890 | locals[r_symndx].got_refcount += 1; |
| 5891 | old_got_type = locals[r_symndx].got_type; |
| 5892 | } |
| 5893 | |
| 5894 | /* If a variable is accessed with both general dynamic TLS |
| 5895 | methods, two slots may be created. */ |
| 5896 | if (GOT_TLS_GD_ANY_P (old_got_type) && GOT_TLS_GD_ANY_P (got_type)) |
| 5897 | got_type |= old_got_type; |
| 5898 | |
| 5899 | /* We will already have issued an error message if there |
| 5900 | is a TLS/non-TLS mismatch, based on the symbol type. |
| 5901 | So just combine any TLS types needed. */ |
| 5902 | if (old_got_type != GOT_UNKNOWN && old_got_type != GOT_NORMAL |
| 5903 | && got_type != GOT_NORMAL) |
| 5904 | got_type |= old_got_type; |
| 5905 | |
| 5906 | /* If the symbol is accessed by both IE and GD methods, we |
| 5907 | are able to relax. Turn off the GD flag, without |
| 5908 | messing up with any other kind of TLS types that may be |
| 5909 | involved. */ |
| 5910 | if ((got_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (got_type)) |
| 5911 | got_type &= ~ (GOT_TLSDESC_GD | GOT_TLS_GD); |
| 5912 | |
| 5913 | if (old_got_type != got_type) |
| 5914 | { |
| 5915 | if (h != NULL) |
| 5916 | elf_aarch64_hash_entry (h)->got_type = got_type; |
| 5917 | else |
| 5918 | { |
| 5919 | struct elf_aarch64_local_symbol *locals; |
| 5920 | locals = elf_aarch64_locals (abfd); |
| 5921 | BFD_ASSERT (r_symndx < symtab_hdr->sh_info); |
| 5922 | locals[r_symndx].got_type = got_type; |
| 5923 | } |
| 5924 | } |
| 5925 | |
| 5926 | if (htab->root.dynobj == NULL) |
| 5927 | htab->root.dynobj = abfd; |
| 5928 | if (! aarch64_elf_create_got_section (htab->root.dynobj, info)) |
| 5929 | return FALSE; |
| 5930 | break; |
| 5931 | } |
| 5932 | |
| 5933 | case BFD_RELOC_AARCH64_MOVW_G0_NC: |
| 5934 | case BFD_RELOC_AARCH64_MOVW_G1_NC: |
| 5935 | case BFD_RELOC_AARCH64_MOVW_G2_NC: |
| 5936 | case BFD_RELOC_AARCH64_MOVW_G3: |
| 5937 | if (info->shared) |
| 5938 | { |
| 5939 | int howto_index = bfd_r_type - BFD_RELOC_AARCH64_RELOC_START; |
| 5940 | (*_bfd_error_handler) |
| 5941 | (_("%B: relocation %s against `%s' can not be used when making " |
| 5942 | "a shared object; recompile with -fPIC"), |
| 5943 | abfd, elfNN_aarch64_howto_table[howto_index].name, |
| 5944 | (h) ? h->root.root.string : "a local symbol"); |
| 5945 | bfd_set_error (bfd_error_bad_value); |
| 5946 | return FALSE; |
| 5947 | } |
| 5948 | |
| 5949 | case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL: |
| 5950 | case BFD_RELOC_AARCH64_ADR_HI21_PCREL: |
| 5951 | case BFD_RELOC_AARCH64_ADR_LO21_PCREL: |
| 5952 | if (h != NULL && info->executable) |
| 5953 | { |
| 5954 | /* If this reloc is in a read-only section, we might |
| 5955 | need a copy reloc. We can't check reliably at this |
| 5956 | stage whether the section is read-only, as input |
| 5957 | sections have not yet been mapped to output sections. |
| 5958 | Tentatively set the flag for now, and correct in |
| 5959 | adjust_dynamic_symbol. */ |
| 5960 | h->non_got_ref = 1; |
| 5961 | h->plt.refcount += 1; |
| 5962 | h->pointer_equality_needed = 1; |
| 5963 | } |
| 5964 | /* FIXME:: RR need to handle these in shared libraries |
| 5965 | and essentially bomb out as these being non-PIC |
| 5966 | relocations in shared libraries. */ |
| 5967 | break; |
| 5968 | |
| 5969 | case BFD_RELOC_AARCH64_CALL26: |
| 5970 | case BFD_RELOC_AARCH64_JUMP26: |
| 5971 | /* If this is a local symbol then we resolve it |
| 5972 | directly without creating a PLT entry. */ |
| 5973 | if (h == NULL) |
| 5974 | continue; |
| 5975 | |
| 5976 | h->needs_plt = 1; |
| 5977 | if (h->plt.refcount <= 0) |
| 5978 | h->plt.refcount = 1; |
| 5979 | else |
| 5980 | h->plt.refcount += 1; |
| 5981 | break; |
| 5982 | |
| 5983 | default: |
| 5984 | break; |
| 5985 | } |
| 5986 | } |
| 5987 | |
| 5988 | return TRUE; |
| 5989 | } |
| 5990 | |
| 5991 | /* Treat mapping symbols as special target symbols. */ |
| 5992 | |
| 5993 | static bfd_boolean |
| 5994 | elfNN_aarch64_is_target_special_symbol (bfd *abfd ATTRIBUTE_UNUSED, |
| 5995 | asymbol *sym) |
| 5996 | { |
| 5997 | return bfd_is_aarch64_special_symbol_name (sym->name, |
| 5998 | BFD_AARCH64_SPECIAL_SYM_TYPE_ANY); |
| 5999 | } |
| 6000 | |
| 6001 | /* This is a copy of elf_find_function () from elf.c except that |
| 6002 | AArch64 mapping symbols are ignored when looking for function names. */ |
| 6003 | |
| 6004 | static bfd_boolean |
| 6005 | aarch64_elf_find_function (bfd *abfd ATTRIBUTE_UNUSED, |
| 6006 | asymbol **symbols, |
| 6007 | asection *section, |
| 6008 | bfd_vma offset, |
| 6009 | const char **filename_ptr, |
| 6010 | const char **functionname_ptr) |
| 6011 | { |
| 6012 | const char *filename = NULL; |
| 6013 | asymbol *func = NULL; |
| 6014 | bfd_vma low_func = 0; |
| 6015 | asymbol **p; |
| 6016 | |
| 6017 | for (p = symbols; *p != NULL; p++) |
| 6018 | { |
| 6019 | elf_symbol_type *q; |
| 6020 | |
| 6021 | q = (elf_symbol_type *) * p; |
| 6022 | |
| 6023 | switch (ELF_ST_TYPE (q->internal_elf_sym.st_info)) |
| 6024 | { |
| 6025 | default: |
| 6026 | break; |
| 6027 | case STT_FILE: |
| 6028 | filename = bfd_asymbol_name (&q->symbol); |
| 6029 | break; |
| 6030 | case STT_FUNC: |
| 6031 | case STT_NOTYPE: |
| 6032 | /* Skip mapping symbols. */ |
| 6033 | if ((q->symbol.flags & BSF_LOCAL) |
| 6034 | && (bfd_is_aarch64_special_symbol_name |
| 6035 | (q->symbol.name, BFD_AARCH64_SPECIAL_SYM_TYPE_ANY))) |
| 6036 | continue; |
| 6037 | /* Fall through. */ |
| 6038 | if (bfd_get_section (&q->symbol) == section |
| 6039 | && q->symbol.value >= low_func && q->symbol.value <= offset) |
| 6040 | { |
| 6041 | func = (asymbol *) q; |
| 6042 | low_func = q->symbol.value; |
| 6043 | } |
| 6044 | break; |
| 6045 | } |
| 6046 | } |
| 6047 | |
| 6048 | if (func == NULL) |
| 6049 | return FALSE; |
| 6050 | |
| 6051 | if (filename_ptr) |
| 6052 | *filename_ptr = filename; |
| 6053 | if (functionname_ptr) |
| 6054 | *functionname_ptr = bfd_asymbol_name (func); |
| 6055 | |
| 6056 | return TRUE; |
| 6057 | } |
| 6058 | |
| 6059 | |
| 6060 | /* Find the nearest line to a particular section and offset, for error |
| 6061 | reporting. This code is a duplicate of the code in elf.c, except |
| 6062 | that it uses aarch64_elf_find_function. */ |
| 6063 | |
| 6064 | static bfd_boolean |
| 6065 | elfNN_aarch64_find_nearest_line (bfd *abfd, |
| 6066 | asymbol **symbols, |
| 6067 | asection *section, |
| 6068 | bfd_vma offset, |
| 6069 | const char **filename_ptr, |
| 6070 | const char **functionname_ptr, |
| 6071 | unsigned int *line_ptr, |
| 6072 | unsigned int *discriminator_ptr) |
| 6073 | { |
| 6074 | bfd_boolean found = FALSE; |
| 6075 | |
| 6076 | if (_bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset, |
| 6077 | filename_ptr, functionname_ptr, |
| 6078 | line_ptr, discriminator_ptr, |
| 6079 | dwarf_debug_sections, 0, |
| 6080 | &elf_tdata (abfd)->dwarf2_find_line_info)) |
| 6081 | { |
| 6082 | if (!*functionname_ptr) |
| 6083 | aarch64_elf_find_function (abfd, symbols, section, offset, |
| 6084 | *filename_ptr ? NULL : filename_ptr, |
| 6085 | functionname_ptr); |
| 6086 | |
| 6087 | return TRUE; |
| 6088 | } |
| 6089 | |
| 6090 | /* Skip _bfd_dwarf1_find_nearest_line since no known AArch64 |
| 6091 | toolchain uses DWARF1. */ |
| 6092 | |
| 6093 | if (!_bfd_stab_section_find_nearest_line (abfd, symbols, section, offset, |
| 6094 | &found, filename_ptr, |
| 6095 | functionname_ptr, line_ptr, |
| 6096 | &elf_tdata (abfd)->line_info)) |
| 6097 | return FALSE; |
| 6098 | |
| 6099 | if (found && (*functionname_ptr || *line_ptr)) |
| 6100 | return TRUE; |
| 6101 | |
| 6102 | if (symbols == NULL) |
| 6103 | return FALSE; |
| 6104 | |
| 6105 | if (!aarch64_elf_find_function (abfd, symbols, section, offset, |
| 6106 | filename_ptr, functionname_ptr)) |
| 6107 | return FALSE; |
| 6108 | |
| 6109 | *line_ptr = 0; |
| 6110 | return TRUE; |
| 6111 | } |
| 6112 | |
| 6113 | static bfd_boolean |
| 6114 | elfNN_aarch64_find_inliner_info (bfd *abfd, |
| 6115 | const char **filename_ptr, |
| 6116 | const char **functionname_ptr, |
| 6117 | unsigned int *line_ptr) |
| 6118 | { |
| 6119 | bfd_boolean found; |
| 6120 | found = _bfd_dwarf2_find_inliner_info |
| 6121 | (abfd, filename_ptr, |
| 6122 | functionname_ptr, line_ptr, &elf_tdata (abfd)->dwarf2_find_line_info); |
| 6123 | return found; |
| 6124 | } |
| 6125 | |
| 6126 | |
| 6127 | static void |
| 6128 | elfNN_aarch64_post_process_headers (bfd *abfd, |
| 6129 | struct bfd_link_info *link_info) |
| 6130 | { |
| 6131 | Elf_Internal_Ehdr *i_ehdrp; /* ELF file header, internal form. */ |
| 6132 | |
| 6133 | i_ehdrp = elf_elfheader (abfd); |
| 6134 | i_ehdrp->e_ident[EI_ABIVERSION] = AARCH64_ELF_ABI_VERSION; |
| 6135 | |
| 6136 | _bfd_elf_post_process_headers (abfd, link_info); |
| 6137 | } |
| 6138 | |
| 6139 | static enum elf_reloc_type_class |
| 6140 | elfNN_aarch64_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 6141 | const asection *rel_sec ATTRIBUTE_UNUSED, |
| 6142 | const Elf_Internal_Rela *rela) |
| 6143 | { |
| 6144 | switch ((int) ELFNN_R_TYPE (rela->r_info)) |
| 6145 | { |
| 6146 | case AARCH64_R (RELATIVE): |
| 6147 | return reloc_class_relative; |
| 6148 | case AARCH64_R (JUMP_SLOT): |
| 6149 | return reloc_class_plt; |
| 6150 | case AARCH64_R (COPY): |
| 6151 | return reloc_class_copy; |
| 6152 | default: |
| 6153 | return reloc_class_normal; |
| 6154 | } |
| 6155 | } |
| 6156 | |
| 6157 | /* Handle an AArch64 specific section when reading an object file. This is |
| 6158 | called when bfd_section_from_shdr finds a section with an unknown |
| 6159 | type. */ |
| 6160 | |
| 6161 | static bfd_boolean |
| 6162 | elfNN_aarch64_section_from_shdr (bfd *abfd, |
| 6163 | Elf_Internal_Shdr *hdr, |
| 6164 | const char *name, int shindex) |
| 6165 | { |
| 6166 | /* There ought to be a place to keep ELF backend specific flags, but |
| 6167 | at the moment there isn't one. We just keep track of the |
| 6168 | sections by their name, instead. Fortunately, the ABI gives |
| 6169 | names for all the AArch64 specific sections, so we will probably get |
| 6170 | away with this. */ |
| 6171 | switch (hdr->sh_type) |
| 6172 | { |
| 6173 | case SHT_AARCH64_ATTRIBUTES: |
| 6174 | break; |
| 6175 | |
| 6176 | default: |
| 6177 | return FALSE; |
| 6178 | } |
| 6179 | |
| 6180 | if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) |
| 6181 | return FALSE; |
| 6182 | |
| 6183 | return TRUE; |
| 6184 | } |
| 6185 | |
| 6186 | /* A structure used to record a list of sections, independently |
| 6187 | of the next and prev fields in the asection structure. */ |
| 6188 | typedef struct section_list |
| 6189 | { |
| 6190 | asection *sec; |
| 6191 | struct section_list *next; |
| 6192 | struct section_list *prev; |
| 6193 | } |
| 6194 | section_list; |
| 6195 | |
| 6196 | /* Unfortunately we need to keep a list of sections for which |
| 6197 | an _aarch64_elf_section_data structure has been allocated. This |
| 6198 | is because it is possible for functions like elfNN_aarch64_write_section |
| 6199 | to be called on a section which has had an elf_data_structure |
| 6200 | allocated for it (and so the used_by_bfd field is valid) but |
| 6201 | for which the AArch64 extended version of this structure - the |
| 6202 | _aarch64_elf_section_data structure - has not been allocated. */ |
| 6203 | static section_list *sections_with_aarch64_elf_section_data = NULL; |
| 6204 | |
| 6205 | static void |
| 6206 | record_section_with_aarch64_elf_section_data (asection *sec) |
| 6207 | { |
| 6208 | struct section_list *entry; |
| 6209 | |
| 6210 | entry = bfd_malloc (sizeof (*entry)); |
| 6211 | if (entry == NULL) |
| 6212 | return; |
| 6213 | entry->sec = sec; |
| 6214 | entry->next = sections_with_aarch64_elf_section_data; |
| 6215 | entry->prev = NULL; |
| 6216 | if (entry->next != NULL) |
| 6217 | entry->next->prev = entry; |
| 6218 | sections_with_aarch64_elf_section_data = entry; |
| 6219 | } |
| 6220 | |
| 6221 | static struct section_list * |
| 6222 | find_aarch64_elf_section_entry (asection *sec) |
| 6223 | { |
| 6224 | struct section_list *entry; |
| 6225 | static struct section_list *last_entry = NULL; |
| 6226 | |
| 6227 | /* This is a short cut for the typical case where the sections are added |
| 6228 | to the sections_with_aarch64_elf_section_data list in forward order and |
| 6229 | then looked up here in backwards order. This makes a real difference |
| 6230 | to the ld-srec/sec64k.exp linker test. */ |
| 6231 | entry = sections_with_aarch64_elf_section_data; |
| 6232 | if (last_entry != NULL) |
| 6233 | { |
| 6234 | if (last_entry->sec == sec) |
| 6235 | entry = last_entry; |
| 6236 | else if (last_entry->next != NULL && last_entry->next->sec == sec) |
| 6237 | entry = last_entry->next; |
| 6238 | } |
| 6239 | |
| 6240 | for (; entry; entry = entry->next) |
| 6241 | if (entry->sec == sec) |
| 6242 | break; |
| 6243 | |
| 6244 | if (entry) |
| 6245 | /* Record the entry prior to this one - it is the entry we are |
| 6246 | most likely to want to locate next time. Also this way if we |
| 6247 | have been called from |
| 6248 | unrecord_section_with_aarch64_elf_section_data () we will not |
| 6249 | be caching a pointer that is about to be freed. */ |
| 6250 | last_entry = entry->prev; |
| 6251 | |
| 6252 | return entry; |
| 6253 | } |
| 6254 | |
| 6255 | static void |
| 6256 | unrecord_section_with_aarch64_elf_section_data (asection *sec) |
| 6257 | { |
| 6258 | struct section_list *entry; |
| 6259 | |
| 6260 | entry = find_aarch64_elf_section_entry (sec); |
| 6261 | |
| 6262 | if (entry) |
| 6263 | { |
| 6264 | if (entry->prev != NULL) |
| 6265 | entry->prev->next = entry->next; |
| 6266 | if (entry->next != NULL) |
| 6267 | entry->next->prev = entry->prev; |
| 6268 | if (entry == sections_with_aarch64_elf_section_data) |
| 6269 | sections_with_aarch64_elf_section_data = entry->next; |
| 6270 | free (entry); |
| 6271 | } |
| 6272 | } |
| 6273 | |
| 6274 | |
| 6275 | typedef struct |
| 6276 | { |
| 6277 | void *finfo; |
| 6278 | struct bfd_link_info *info; |
| 6279 | asection *sec; |
| 6280 | int sec_shndx; |
| 6281 | int (*func) (void *, const char *, Elf_Internal_Sym *, |
| 6282 | asection *, struct elf_link_hash_entry *); |
| 6283 | } output_arch_syminfo; |
| 6284 | |
| 6285 | enum map_symbol_type |
| 6286 | { |
| 6287 | AARCH64_MAP_INSN, |
| 6288 | AARCH64_MAP_DATA |
| 6289 | }; |
| 6290 | |
| 6291 | |
| 6292 | /* Output a single mapping symbol. */ |
| 6293 | |
| 6294 | static bfd_boolean |
| 6295 | elfNN_aarch64_output_map_sym (output_arch_syminfo *osi, |
| 6296 | enum map_symbol_type type, bfd_vma offset) |
| 6297 | { |
| 6298 | static const char *names[2] = { "$x", "$d" }; |
| 6299 | Elf_Internal_Sym sym; |
| 6300 | |
| 6301 | sym.st_value = (osi->sec->output_section->vma |
| 6302 | + osi->sec->output_offset + offset); |
| 6303 | sym.st_size = 0; |
| 6304 | sym.st_other = 0; |
| 6305 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE); |
| 6306 | sym.st_shndx = osi->sec_shndx; |
| 6307 | return osi->func (osi->finfo, names[type], &sym, osi->sec, NULL) == 1; |
| 6308 | } |
| 6309 | |
| 6310 | |
| 6311 | |
| 6312 | /* Output mapping symbols for PLT entries associated with H. */ |
| 6313 | |
| 6314 | static bfd_boolean |
| 6315 | elfNN_aarch64_output_plt_map (struct elf_link_hash_entry *h, void *inf) |
| 6316 | { |
| 6317 | output_arch_syminfo *osi = (output_arch_syminfo *) inf; |
| 6318 | bfd_vma addr; |
| 6319 | |
| 6320 | if (h->root.type == bfd_link_hash_indirect) |
| 6321 | return TRUE; |
| 6322 | |
| 6323 | if (h->root.type == bfd_link_hash_warning) |
| 6324 | /* When warning symbols are created, they **replace** the "real" |
| 6325 | entry in the hash table, thus we never get to see the real |
| 6326 | symbol in a hash traversal. So look at it now. */ |
| 6327 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 6328 | |
| 6329 | if (h->plt.offset == (bfd_vma) - 1) |
| 6330 | return TRUE; |
| 6331 | |
| 6332 | addr = h->plt.offset; |
| 6333 | if (addr == 32) |
| 6334 | { |
| 6335 | if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr)) |
| 6336 | return FALSE; |
| 6337 | } |
| 6338 | return TRUE; |
| 6339 | } |
| 6340 | |
| 6341 | |
| 6342 | /* Output a single local symbol for a generated stub. */ |
| 6343 | |
| 6344 | static bfd_boolean |
| 6345 | elfNN_aarch64_output_stub_sym (output_arch_syminfo *osi, const char *name, |
| 6346 | bfd_vma offset, bfd_vma size) |
| 6347 | { |
| 6348 | Elf_Internal_Sym sym; |
| 6349 | |
| 6350 | sym.st_value = (osi->sec->output_section->vma |
| 6351 | + osi->sec->output_offset + offset); |
| 6352 | sym.st_size = size; |
| 6353 | sym.st_other = 0; |
| 6354 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FUNC); |
| 6355 | sym.st_shndx = osi->sec_shndx; |
| 6356 | return osi->func (osi->finfo, name, &sym, osi->sec, NULL) == 1; |
| 6357 | } |
| 6358 | |
| 6359 | static bfd_boolean |
| 6360 | aarch64_map_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg) |
| 6361 | { |
| 6362 | struct elf_aarch64_stub_hash_entry *stub_entry; |
| 6363 | asection *stub_sec; |
| 6364 | bfd_vma addr; |
| 6365 | char *stub_name; |
| 6366 | output_arch_syminfo *osi; |
| 6367 | |
| 6368 | /* Massage our args to the form they really have. */ |
| 6369 | stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry; |
| 6370 | osi = (output_arch_syminfo *) in_arg; |
| 6371 | |
| 6372 | stub_sec = stub_entry->stub_sec; |
| 6373 | |
| 6374 | /* Ensure this stub is attached to the current section being |
| 6375 | processed. */ |
| 6376 | if (stub_sec != osi->sec) |
| 6377 | return TRUE; |
| 6378 | |
| 6379 | addr = (bfd_vma) stub_entry->stub_offset; |
| 6380 | |
| 6381 | stub_name = stub_entry->output_name; |
| 6382 | |
| 6383 | switch (stub_entry->stub_type) |
| 6384 | { |
| 6385 | case aarch64_stub_adrp_branch: |
| 6386 | if (!elfNN_aarch64_output_stub_sym (osi, stub_name, addr, |
| 6387 | sizeof (aarch64_adrp_branch_stub))) |
| 6388 | return FALSE; |
| 6389 | if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr)) |
| 6390 | return FALSE; |
| 6391 | break; |
| 6392 | case aarch64_stub_long_branch: |
| 6393 | if (!elfNN_aarch64_output_stub_sym |
| 6394 | (osi, stub_name, addr, sizeof (aarch64_long_branch_stub))) |
| 6395 | return FALSE; |
| 6396 | if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr)) |
| 6397 | return FALSE; |
| 6398 | if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_DATA, addr + 16)) |
| 6399 | return FALSE; |
| 6400 | break; |
| 6401 | case aarch64_stub_erratum_835769_veneer: |
| 6402 | if (!elfNN_aarch64_output_stub_sym (osi, stub_name, addr, |
| 6403 | sizeof (aarch64_erratum_835769_stub))) |
| 6404 | return FALSE; |
| 6405 | if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr)) |
| 6406 | return FALSE; |
| 6407 | break; |
| 6408 | default: |
| 6409 | BFD_FAIL (); |
| 6410 | } |
| 6411 | |
| 6412 | return TRUE; |
| 6413 | } |
| 6414 | |
| 6415 | /* Output mapping symbols for linker generated sections. */ |
| 6416 | |
| 6417 | static bfd_boolean |
| 6418 | elfNN_aarch64_output_arch_local_syms (bfd *output_bfd, |
| 6419 | struct bfd_link_info *info, |
| 6420 | void *finfo, |
| 6421 | int (*func) (void *, const char *, |
| 6422 | Elf_Internal_Sym *, |
| 6423 | asection *, |
| 6424 | struct elf_link_hash_entry |
| 6425 | *)) |
| 6426 | { |
| 6427 | output_arch_syminfo osi; |
| 6428 | struct elf_aarch64_link_hash_table *htab; |
| 6429 | |
| 6430 | htab = elf_aarch64_hash_table (info); |
| 6431 | |
| 6432 | osi.finfo = finfo; |
| 6433 | osi.info = info; |
| 6434 | osi.func = func; |
| 6435 | |
| 6436 | /* Long calls stubs. */ |
| 6437 | if (htab->stub_bfd && htab->stub_bfd->sections) |
| 6438 | { |
| 6439 | asection *stub_sec; |
| 6440 | |
| 6441 | for (stub_sec = htab->stub_bfd->sections; |
| 6442 | stub_sec != NULL; stub_sec = stub_sec->next) |
| 6443 | { |
| 6444 | /* Ignore non-stub sections. */ |
| 6445 | if (!strstr (stub_sec->name, STUB_SUFFIX)) |
| 6446 | continue; |
| 6447 | |
| 6448 | osi.sec = stub_sec; |
| 6449 | |
| 6450 | osi.sec_shndx = _bfd_elf_section_from_bfd_section |
| 6451 | (output_bfd, osi.sec->output_section); |
| 6452 | |
| 6453 | bfd_hash_traverse (&htab->stub_hash_table, aarch64_map_one_stub, |
| 6454 | &osi); |
| 6455 | } |
| 6456 | } |
| 6457 | |
| 6458 | /* Finally, output mapping symbols for the PLT. */ |
| 6459 | if (!htab->root.splt || htab->root.splt->size == 0) |
| 6460 | return TRUE; |
| 6461 | |
| 6462 | /* For now live without mapping symbols for the plt. */ |
| 6463 | osi.sec_shndx = _bfd_elf_section_from_bfd_section |
| 6464 | (output_bfd, htab->root.splt->output_section); |
| 6465 | osi.sec = htab->root.splt; |
| 6466 | |
| 6467 | elf_link_hash_traverse (&htab->root, elfNN_aarch64_output_plt_map, |
| 6468 | (void *) &osi); |
| 6469 | |
| 6470 | return TRUE; |
| 6471 | |
| 6472 | } |
| 6473 | |
| 6474 | /* Allocate target specific section data. */ |
| 6475 | |
| 6476 | static bfd_boolean |
| 6477 | elfNN_aarch64_new_section_hook (bfd *abfd, asection *sec) |
| 6478 | { |
| 6479 | if (!sec->used_by_bfd) |
| 6480 | { |
| 6481 | _aarch64_elf_section_data *sdata; |
| 6482 | bfd_size_type amt = sizeof (*sdata); |
| 6483 | |
| 6484 | sdata = bfd_zalloc (abfd, amt); |
| 6485 | if (sdata == NULL) |
| 6486 | return FALSE; |
| 6487 | sec->used_by_bfd = sdata; |
| 6488 | } |
| 6489 | |
| 6490 | record_section_with_aarch64_elf_section_data (sec); |
| 6491 | |
| 6492 | return _bfd_elf_new_section_hook (abfd, sec); |
| 6493 | } |
| 6494 | |
| 6495 | |
| 6496 | static void |
| 6497 | unrecord_section_via_map_over_sections (bfd *abfd ATTRIBUTE_UNUSED, |
| 6498 | asection *sec, |
| 6499 | void *ignore ATTRIBUTE_UNUSED) |
| 6500 | { |
| 6501 | unrecord_section_with_aarch64_elf_section_data (sec); |
| 6502 | } |
| 6503 | |
| 6504 | static bfd_boolean |
| 6505 | elfNN_aarch64_close_and_cleanup (bfd *abfd) |
| 6506 | { |
| 6507 | if (abfd->sections) |
| 6508 | bfd_map_over_sections (abfd, |
| 6509 | unrecord_section_via_map_over_sections, NULL); |
| 6510 | |
| 6511 | return _bfd_elf_close_and_cleanup (abfd); |
| 6512 | } |
| 6513 | |
| 6514 | static bfd_boolean |
| 6515 | elfNN_aarch64_bfd_free_cached_info (bfd *abfd) |
| 6516 | { |
| 6517 | if (abfd->sections) |
| 6518 | bfd_map_over_sections (abfd, |
| 6519 | unrecord_section_via_map_over_sections, NULL); |
| 6520 | |
| 6521 | return _bfd_free_cached_info (abfd); |
| 6522 | } |
| 6523 | |
| 6524 | /* Create dynamic sections. This is different from the ARM backend in that |
| 6525 | the got, plt, gotplt and their relocation sections are all created in the |
| 6526 | standard part of the bfd elf backend. */ |
| 6527 | |
| 6528 | static bfd_boolean |
| 6529 | elfNN_aarch64_create_dynamic_sections (bfd *dynobj, |
| 6530 | struct bfd_link_info *info) |
| 6531 | { |
| 6532 | struct elf_aarch64_link_hash_table *htab; |
| 6533 | |
| 6534 | /* We need to create .got section. */ |
| 6535 | if (!aarch64_elf_create_got_section (dynobj, info)) |
| 6536 | return FALSE; |
| 6537 | |
| 6538 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) |
| 6539 | return FALSE; |
| 6540 | |
| 6541 | htab = elf_aarch64_hash_table (info); |
| 6542 | htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss"); |
| 6543 | if (!info->shared) |
| 6544 | htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss"); |
| 6545 | |
| 6546 | if (!htab->sdynbss || (!info->shared && !htab->srelbss)) |
| 6547 | abort (); |
| 6548 | |
| 6549 | return TRUE; |
| 6550 | } |
| 6551 | |
| 6552 | |
| 6553 | /* Allocate space in .plt, .got and associated reloc sections for |
| 6554 | dynamic relocs. */ |
| 6555 | |
| 6556 | static bfd_boolean |
| 6557 | elfNN_aarch64_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) |
| 6558 | { |
| 6559 | struct bfd_link_info *info; |
| 6560 | struct elf_aarch64_link_hash_table *htab; |
| 6561 | struct elf_aarch64_link_hash_entry *eh; |
| 6562 | struct elf_dyn_relocs *p; |
| 6563 | |
| 6564 | /* An example of a bfd_link_hash_indirect symbol is versioned |
| 6565 | symbol. For example: __gxx_personality_v0(bfd_link_hash_indirect) |
| 6566 | -> __gxx_personality_v0(bfd_link_hash_defined) |
| 6567 | |
| 6568 | There is no need to process bfd_link_hash_indirect symbols here |
| 6569 | because we will also be presented with the concrete instance of |
| 6570 | the symbol and elfNN_aarch64_copy_indirect_symbol () will have been |
| 6571 | called to copy all relevant data from the generic to the concrete |
| 6572 | symbol instance. |
| 6573 | */ |
| 6574 | if (h->root.type == bfd_link_hash_indirect) |
| 6575 | return TRUE; |
| 6576 | |
| 6577 | if (h->root.type == bfd_link_hash_warning) |
| 6578 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 6579 | |
| 6580 | info = (struct bfd_link_info *) inf; |
| 6581 | htab = elf_aarch64_hash_table (info); |
| 6582 | |
| 6583 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it |
| 6584 | here if it is defined and referenced in a non-shared object. */ |
| 6585 | if (h->type == STT_GNU_IFUNC |
| 6586 | && h->def_regular) |
| 6587 | return TRUE; |
| 6588 | else if (htab->root.dynamic_sections_created && h->plt.refcount > 0) |
| 6589 | { |
| 6590 | /* Make sure this symbol is output as a dynamic symbol. |
| 6591 | Undefined weak syms won't yet be marked as dynamic. */ |
| 6592 | if (h->dynindx == -1 && !h->forced_local) |
| 6593 | { |
| 6594 | if (!bfd_elf_link_record_dynamic_symbol (info, h)) |
| 6595 | return FALSE; |
| 6596 | } |
| 6597 | |
| 6598 | if (info->shared || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) |
| 6599 | { |
| 6600 | asection *s = htab->root.splt; |
| 6601 | |
| 6602 | /* If this is the first .plt entry, make room for the special |
| 6603 | first entry. */ |
| 6604 | if (s->size == 0) |
| 6605 | s->size += htab->plt_header_size; |
| 6606 | |
| 6607 | h->plt.offset = s->size; |
| 6608 | |
| 6609 | /* If this symbol is not defined in a regular file, and we are |
| 6610 | not generating a shared library, then set the symbol to this |
| 6611 | location in the .plt. This is required to make function |
| 6612 | pointers compare as equal between the normal executable and |
| 6613 | the shared library. */ |
| 6614 | if (!info->shared && !h->def_regular) |
| 6615 | { |
| 6616 | h->root.u.def.section = s; |
| 6617 | h->root.u.def.value = h->plt.offset; |
| 6618 | } |
| 6619 | |
| 6620 | /* Make room for this entry. For now we only create the |
| 6621 | small model PLT entries. We later need to find a way |
| 6622 | of relaxing into these from the large model PLT entries. */ |
| 6623 | s->size += PLT_SMALL_ENTRY_SIZE; |
| 6624 | |
| 6625 | /* We also need to make an entry in the .got.plt section, which |
| 6626 | will be placed in the .got section by the linker script. */ |
| 6627 | htab->root.sgotplt->size += GOT_ENTRY_SIZE; |
| 6628 | |
| 6629 | /* We also need to make an entry in the .rela.plt section. */ |
| 6630 | htab->root.srelplt->size += RELOC_SIZE (htab); |
| 6631 | |
| 6632 | /* We need to ensure that all GOT entries that serve the PLT |
| 6633 | are consecutive with the special GOT slots [0] [1] and |
| 6634 | [2]. Any addtional relocations, such as |
| 6635 | R_AARCH64_TLSDESC, must be placed after the PLT related |
| 6636 | entries. We abuse the reloc_count such that during |
| 6637 | sizing we adjust reloc_count to indicate the number of |
| 6638 | PLT related reserved entries. In subsequent phases when |
| 6639 | filling in the contents of the reloc entries, PLT related |
| 6640 | entries are placed by computing their PLT index (0 |
| 6641 | .. reloc_count). While other none PLT relocs are placed |
| 6642 | at the slot indicated by reloc_count and reloc_count is |
| 6643 | updated. */ |
| 6644 | |
| 6645 | htab->root.srelplt->reloc_count++; |
| 6646 | } |
| 6647 | else |
| 6648 | { |
| 6649 | h->plt.offset = (bfd_vma) - 1; |
| 6650 | h->needs_plt = 0; |
| 6651 | } |
| 6652 | } |
| 6653 | else |
| 6654 | { |
| 6655 | h->plt.offset = (bfd_vma) - 1; |
| 6656 | h->needs_plt = 0; |
| 6657 | } |
| 6658 | |
| 6659 | eh = (struct elf_aarch64_link_hash_entry *) h; |
| 6660 | eh->tlsdesc_got_jump_table_offset = (bfd_vma) - 1; |
| 6661 | |
| 6662 | if (h->got.refcount > 0) |
| 6663 | { |
| 6664 | bfd_boolean dyn; |
| 6665 | unsigned got_type = elf_aarch64_hash_entry (h)->got_type; |
| 6666 | |
| 6667 | h->got.offset = (bfd_vma) - 1; |
| 6668 | |
| 6669 | dyn = htab->root.dynamic_sections_created; |
| 6670 | |
| 6671 | /* Make sure this symbol is output as a dynamic symbol. |
| 6672 | Undefined weak syms won't yet be marked as dynamic. */ |
| 6673 | if (dyn && h->dynindx == -1 && !h->forced_local) |
| 6674 | { |
| 6675 | if (!bfd_elf_link_record_dynamic_symbol (info, h)) |
| 6676 | return FALSE; |
| 6677 | } |
| 6678 | |
| 6679 | if (got_type == GOT_UNKNOWN) |
| 6680 | { |
| 6681 | } |
| 6682 | else if (got_type == GOT_NORMAL) |
| 6683 | { |
| 6684 | h->got.offset = htab->root.sgot->size; |
| 6685 | htab->root.sgot->size += GOT_ENTRY_SIZE; |
| 6686 | if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 6687 | || h->root.type != bfd_link_hash_undefweak) |
| 6688 | && (info->shared |
| 6689 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) |
| 6690 | { |
| 6691 | htab->root.srelgot->size += RELOC_SIZE (htab); |
| 6692 | } |
| 6693 | } |
| 6694 | else |
| 6695 | { |
| 6696 | int indx; |
| 6697 | if (got_type & GOT_TLSDESC_GD) |
| 6698 | { |
| 6699 | eh->tlsdesc_got_jump_table_offset = |
| 6700 | (htab->root.sgotplt->size |
| 6701 | - aarch64_compute_jump_table_size (htab)); |
| 6702 | htab->root.sgotplt->size += GOT_ENTRY_SIZE * 2; |
| 6703 | h->got.offset = (bfd_vma) - 2; |
| 6704 | } |
| 6705 | |
| 6706 | if (got_type & GOT_TLS_GD) |
| 6707 | { |
| 6708 | h->got.offset = htab->root.sgot->size; |
| 6709 | htab->root.sgot->size += GOT_ENTRY_SIZE * 2; |
| 6710 | } |
| 6711 | |
| 6712 | if (got_type & GOT_TLS_IE) |
| 6713 | { |
| 6714 | h->got.offset = htab->root.sgot->size; |
| 6715 | htab->root.sgot->size += GOT_ENTRY_SIZE; |
| 6716 | } |
| 6717 | |
| 6718 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
| 6719 | if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 6720 | || h->root.type != bfd_link_hash_undefweak) |
| 6721 | && (info->shared |
| 6722 | || indx != 0 |
| 6723 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) |
| 6724 | { |
| 6725 | if (got_type & GOT_TLSDESC_GD) |
| 6726 | { |
| 6727 | htab->root.srelplt->size += RELOC_SIZE (htab); |
| 6728 | /* Note reloc_count not incremented here! We have |
| 6729 | already adjusted reloc_count for this relocation |
| 6730 | type. */ |
| 6731 | |
| 6732 | /* TLSDESC PLT is now needed, but not yet determined. */ |
| 6733 | htab->tlsdesc_plt = (bfd_vma) - 1; |
| 6734 | } |
| 6735 | |
| 6736 | if (got_type & GOT_TLS_GD) |
| 6737 | htab->root.srelgot->size += RELOC_SIZE (htab) * 2; |
| 6738 | |
| 6739 | if (got_type & GOT_TLS_IE) |
| 6740 | htab->root.srelgot->size += RELOC_SIZE (htab); |
| 6741 | } |
| 6742 | } |
| 6743 | } |
| 6744 | else |
| 6745 | { |
| 6746 | h->got.offset = (bfd_vma) - 1; |
| 6747 | } |
| 6748 | |
| 6749 | if (eh->dyn_relocs == NULL) |
| 6750 | return TRUE; |
| 6751 | |
| 6752 | /* In the shared -Bsymbolic case, discard space allocated for |
| 6753 | dynamic pc-relative relocs against symbols which turn out to be |
| 6754 | defined in regular objects. For the normal shared case, discard |
| 6755 | space for pc-relative relocs that have become local due to symbol |
| 6756 | visibility changes. */ |
| 6757 | |
| 6758 | if (info->shared) |
| 6759 | { |
| 6760 | /* Relocs that use pc_count are those that appear on a call |
| 6761 | insn, or certain REL relocs that can generated via assembly. |
| 6762 | We want calls to protected symbols to resolve directly to the |
| 6763 | function rather than going via the plt. If people want |
| 6764 | function pointer comparisons to work as expected then they |
| 6765 | should avoid writing weird assembly. */ |
| 6766 | if (SYMBOL_CALLS_LOCAL (info, h)) |
| 6767 | { |
| 6768 | struct elf_dyn_relocs **pp; |
| 6769 | |
| 6770 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL;) |
| 6771 | { |
| 6772 | p->count -= p->pc_count; |
| 6773 | p->pc_count = 0; |
| 6774 | if (p->count == 0) |
| 6775 | *pp = p->next; |
| 6776 | else |
| 6777 | pp = &p->next; |
| 6778 | } |
| 6779 | } |
| 6780 | |
| 6781 | /* Also discard relocs on undefined weak syms with non-default |
| 6782 | visibility. */ |
| 6783 | if (eh->dyn_relocs != NULL && h->root.type == bfd_link_hash_undefweak) |
| 6784 | { |
| 6785 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) |
| 6786 | eh->dyn_relocs = NULL; |
| 6787 | |
| 6788 | /* Make sure undefined weak symbols are output as a dynamic |
| 6789 | symbol in PIEs. */ |
| 6790 | else if (h->dynindx == -1 |
| 6791 | && !h->forced_local |
| 6792 | && !bfd_elf_link_record_dynamic_symbol (info, h)) |
| 6793 | return FALSE; |
| 6794 | } |
| 6795 | |
| 6796 | } |
| 6797 | else if (ELIMINATE_COPY_RELOCS) |
| 6798 | { |
| 6799 | /* For the non-shared case, discard space for relocs against |
| 6800 | symbols which turn out to need copy relocs or are not |
| 6801 | dynamic. */ |
| 6802 | |
| 6803 | if (!h->non_got_ref |
| 6804 | && ((h->def_dynamic |
| 6805 | && !h->def_regular) |
| 6806 | || (htab->root.dynamic_sections_created |
| 6807 | && (h->root.type == bfd_link_hash_undefweak |
| 6808 | || h->root.type == bfd_link_hash_undefined)))) |
| 6809 | { |
| 6810 | /* Make sure this symbol is output as a dynamic symbol. |
| 6811 | Undefined weak syms won't yet be marked as dynamic. */ |
| 6812 | if (h->dynindx == -1 |
| 6813 | && !h->forced_local |
| 6814 | && !bfd_elf_link_record_dynamic_symbol (info, h)) |
| 6815 | return FALSE; |
| 6816 | |
| 6817 | /* If that succeeded, we know we'll be keeping all the |
| 6818 | relocs. */ |
| 6819 | if (h->dynindx != -1) |
| 6820 | goto keep; |
| 6821 | } |
| 6822 | |
| 6823 | eh->dyn_relocs = NULL; |
| 6824 | |
| 6825 | keep:; |
| 6826 | } |
| 6827 | |
| 6828 | /* Finally, allocate space. */ |
| 6829 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
| 6830 | { |
| 6831 | asection *sreloc; |
| 6832 | |
| 6833 | sreloc = elf_section_data (p->sec)->sreloc; |
| 6834 | |
| 6835 | BFD_ASSERT (sreloc != NULL); |
| 6836 | |
| 6837 | sreloc->size += p->count * RELOC_SIZE (htab); |
| 6838 | } |
| 6839 | |
| 6840 | return TRUE; |
| 6841 | } |
| 6842 | |
| 6843 | /* Allocate space in .plt, .got and associated reloc sections for |
| 6844 | ifunc dynamic relocs. */ |
| 6845 | |
| 6846 | static bfd_boolean |
| 6847 | elfNN_aarch64_allocate_ifunc_dynrelocs (struct elf_link_hash_entry *h, |
| 6848 | void *inf) |
| 6849 | { |
| 6850 | struct bfd_link_info *info; |
| 6851 | struct elf_aarch64_link_hash_table *htab; |
| 6852 | struct elf_aarch64_link_hash_entry *eh; |
| 6853 | |
| 6854 | /* An example of a bfd_link_hash_indirect symbol is versioned |
| 6855 | symbol. For example: __gxx_personality_v0(bfd_link_hash_indirect) |
| 6856 | -> __gxx_personality_v0(bfd_link_hash_defined) |
| 6857 | |
| 6858 | There is no need to process bfd_link_hash_indirect symbols here |
| 6859 | because we will also be presented with the concrete instance of |
| 6860 | the symbol and elfNN_aarch64_copy_indirect_symbol () will have been |
| 6861 | called to copy all relevant data from the generic to the concrete |
| 6862 | symbol instance. |
| 6863 | */ |
| 6864 | if (h->root.type == bfd_link_hash_indirect) |
| 6865 | return TRUE; |
| 6866 | |
| 6867 | if (h->root.type == bfd_link_hash_warning) |
| 6868 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 6869 | |
| 6870 | info = (struct bfd_link_info *) inf; |
| 6871 | htab = elf_aarch64_hash_table (info); |
| 6872 | |
| 6873 | eh = (struct elf_aarch64_link_hash_entry *) h; |
| 6874 | |
| 6875 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it |
| 6876 | here if it is defined and referenced in a non-shared object. */ |
| 6877 | if (h->type == STT_GNU_IFUNC |
| 6878 | && h->def_regular) |
| 6879 | return _bfd_elf_allocate_ifunc_dyn_relocs (info, h, |
| 6880 | &eh->dyn_relocs, |
| 6881 | htab->plt_entry_size, |
| 6882 | htab->plt_header_size, |
| 6883 | GOT_ENTRY_SIZE); |
| 6884 | return TRUE; |
| 6885 | } |
| 6886 | |
| 6887 | /* Allocate space in .plt, .got and associated reloc sections for |
| 6888 | local dynamic relocs. */ |
| 6889 | |
| 6890 | static bfd_boolean |
| 6891 | elfNN_aarch64_allocate_local_dynrelocs (void **slot, void *inf) |
| 6892 | { |
| 6893 | struct elf_link_hash_entry *h |
| 6894 | = (struct elf_link_hash_entry *) *slot; |
| 6895 | |
| 6896 | if (h->type != STT_GNU_IFUNC |
| 6897 | || !h->def_regular |
| 6898 | || !h->ref_regular |
| 6899 | || !h->forced_local |
| 6900 | || h->root.type != bfd_link_hash_defined) |
| 6901 | abort (); |
| 6902 | |
| 6903 | return elfNN_aarch64_allocate_dynrelocs (h, inf); |
| 6904 | } |
| 6905 | |
| 6906 | /* Allocate space in .plt, .got and associated reloc sections for |
| 6907 | local ifunc dynamic relocs. */ |
| 6908 | |
| 6909 | static bfd_boolean |
| 6910 | elfNN_aarch64_allocate_local_ifunc_dynrelocs (void **slot, void *inf) |
| 6911 | { |
| 6912 | struct elf_link_hash_entry *h |
| 6913 | = (struct elf_link_hash_entry *) *slot; |
| 6914 | |
| 6915 | if (h->type != STT_GNU_IFUNC |
| 6916 | || !h->def_regular |
| 6917 | || !h->ref_regular |
| 6918 | || !h->forced_local |
| 6919 | || h->root.type != bfd_link_hash_defined) |
| 6920 | abort (); |
| 6921 | |
| 6922 | return elfNN_aarch64_allocate_ifunc_dynrelocs (h, inf); |
| 6923 | } |
| 6924 | |
| 6925 | /* This is the most important function of all . Innocuosly named |
| 6926 | though ! */ |
| 6927 | static bfd_boolean |
| 6928 | elfNN_aarch64_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, |
| 6929 | struct bfd_link_info *info) |
| 6930 | { |
| 6931 | struct elf_aarch64_link_hash_table *htab; |
| 6932 | bfd *dynobj; |
| 6933 | asection *s; |
| 6934 | bfd_boolean relocs; |
| 6935 | bfd *ibfd; |
| 6936 | |
| 6937 | htab = elf_aarch64_hash_table ((info)); |
| 6938 | dynobj = htab->root.dynobj; |
| 6939 | |
| 6940 | BFD_ASSERT (dynobj != NULL); |
| 6941 | |
| 6942 | if (htab->root.dynamic_sections_created) |
| 6943 | { |
| 6944 | if (info->executable) |
| 6945 | { |
| 6946 | s = bfd_get_linker_section (dynobj, ".interp"); |
| 6947 | if (s == NULL) |
| 6948 | abort (); |
| 6949 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
| 6950 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
| 6951 | } |
| 6952 | } |
| 6953 | |
| 6954 | /* Set up .got offsets for local syms, and space for local dynamic |
| 6955 | relocs. */ |
| 6956 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
| 6957 | { |
| 6958 | struct elf_aarch64_local_symbol *locals = NULL; |
| 6959 | Elf_Internal_Shdr *symtab_hdr; |
| 6960 | asection *srel; |
| 6961 | unsigned int i; |
| 6962 | |
| 6963 | if (!is_aarch64_elf (ibfd)) |
| 6964 | continue; |
| 6965 | |
| 6966 | for (s = ibfd->sections; s != NULL; s = s->next) |
| 6967 | { |
| 6968 | struct elf_dyn_relocs *p; |
| 6969 | |
| 6970 | for (p = (struct elf_dyn_relocs *) |
| 6971 | (elf_section_data (s)->local_dynrel); p != NULL; p = p->next) |
| 6972 | { |
| 6973 | if (!bfd_is_abs_section (p->sec) |
| 6974 | && bfd_is_abs_section (p->sec->output_section)) |
| 6975 | { |
| 6976 | /* Input section has been discarded, either because |
| 6977 | it is a copy of a linkonce section or due to |
| 6978 | linker script /DISCARD/, so we'll be discarding |
| 6979 | the relocs too. */ |
| 6980 | } |
| 6981 | else if (p->count != 0) |
| 6982 | { |
| 6983 | srel = elf_section_data (p->sec)->sreloc; |
| 6984 | srel->size += p->count * RELOC_SIZE (htab); |
| 6985 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) |
| 6986 | info->flags |= DF_TEXTREL; |
| 6987 | } |
| 6988 | } |
| 6989 | } |
| 6990 | |
| 6991 | locals = elf_aarch64_locals (ibfd); |
| 6992 | if (!locals) |
| 6993 | continue; |
| 6994 | |
| 6995 | symtab_hdr = &elf_symtab_hdr (ibfd); |
| 6996 | srel = htab->root.srelgot; |
| 6997 | for (i = 0; i < symtab_hdr->sh_info; i++) |
| 6998 | { |
| 6999 | locals[i].got_offset = (bfd_vma) - 1; |
| 7000 | locals[i].tlsdesc_got_jump_table_offset = (bfd_vma) - 1; |
| 7001 | if (locals[i].got_refcount > 0) |
| 7002 | { |
| 7003 | unsigned got_type = locals[i].got_type; |
| 7004 | if (got_type & GOT_TLSDESC_GD) |
| 7005 | { |
| 7006 | locals[i].tlsdesc_got_jump_table_offset = |
| 7007 | (htab->root.sgotplt->size |
| 7008 | - aarch64_compute_jump_table_size (htab)); |
| 7009 | htab->root.sgotplt->size += GOT_ENTRY_SIZE * 2; |
| 7010 | locals[i].got_offset = (bfd_vma) - 2; |
| 7011 | } |
| 7012 | |
| 7013 | if (got_type & GOT_TLS_GD) |
| 7014 | { |
| 7015 | locals[i].got_offset = htab->root.sgot->size; |
| 7016 | htab->root.sgot->size += GOT_ENTRY_SIZE * 2; |
| 7017 | } |
| 7018 | |
| 7019 | if (got_type & GOT_TLS_IE) |
| 7020 | { |
| 7021 | locals[i].got_offset = htab->root.sgot->size; |
| 7022 | htab->root.sgot->size += GOT_ENTRY_SIZE; |
| 7023 | } |
| 7024 | |
| 7025 | if (got_type == GOT_UNKNOWN) |
| 7026 | { |
| 7027 | } |
| 7028 | |
| 7029 | if (got_type == GOT_NORMAL) |
| 7030 | { |
| 7031 | } |
| 7032 | |
| 7033 | if (info->shared) |
| 7034 | { |
| 7035 | if (got_type & GOT_TLSDESC_GD) |
| 7036 | { |
| 7037 | htab->root.srelplt->size += RELOC_SIZE (htab); |
| 7038 | /* Note RELOC_COUNT not incremented here! */ |
| 7039 | htab->tlsdesc_plt = (bfd_vma) - 1; |
| 7040 | } |
| 7041 | |
| 7042 | if (got_type & GOT_TLS_GD) |
| 7043 | htab->root.srelgot->size += RELOC_SIZE (htab) * 2; |
| 7044 | |
| 7045 | if (got_type & GOT_TLS_IE) |
| 7046 | htab->root.srelgot->size += RELOC_SIZE (htab); |
| 7047 | } |
| 7048 | } |
| 7049 | else |
| 7050 | { |
| 7051 | locals[i].got_refcount = (bfd_vma) - 1; |
| 7052 | } |
| 7053 | } |
| 7054 | } |
| 7055 | |
| 7056 | |
| 7057 | /* Allocate global sym .plt and .got entries, and space for global |
| 7058 | sym dynamic relocs. */ |
| 7059 | elf_link_hash_traverse (&htab->root, elfNN_aarch64_allocate_dynrelocs, |
| 7060 | info); |
| 7061 | |
| 7062 | /* Allocate global ifunc sym .plt and .got entries, and space for global |
| 7063 | ifunc sym dynamic relocs. */ |
| 7064 | elf_link_hash_traverse (&htab->root, elfNN_aarch64_allocate_ifunc_dynrelocs, |
| 7065 | info); |
| 7066 | |
| 7067 | /* Allocate .plt and .got entries, and space for local symbols. */ |
| 7068 | htab_traverse (htab->loc_hash_table, |
| 7069 | elfNN_aarch64_allocate_local_dynrelocs, |
| 7070 | info); |
| 7071 | |
| 7072 | /* Allocate .plt and .got entries, and space for local ifunc symbols. */ |
| 7073 | htab_traverse (htab->loc_hash_table, |
| 7074 | elfNN_aarch64_allocate_local_ifunc_dynrelocs, |
| 7075 | info); |
| 7076 | |
| 7077 | /* For every jump slot reserved in the sgotplt, reloc_count is |
| 7078 | incremented. However, when we reserve space for TLS descriptors, |
| 7079 | it's not incremented, so in order to compute the space reserved |
| 7080 | for them, it suffices to multiply the reloc count by the jump |
| 7081 | slot size. */ |
| 7082 | |
| 7083 | if (htab->root.srelplt) |
| 7084 | htab->sgotplt_jump_table_size = aarch64_compute_jump_table_size (htab); |
| 7085 | |
| 7086 | if (htab->tlsdesc_plt) |
| 7087 | { |
| 7088 | if (htab->root.splt->size == 0) |
| 7089 | htab->root.splt->size += PLT_ENTRY_SIZE; |
| 7090 | |
| 7091 | htab->tlsdesc_plt = htab->root.splt->size; |
| 7092 | htab->root.splt->size += PLT_TLSDESC_ENTRY_SIZE; |
| 7093 | |
| 7094 | /* If we're not using lazy TLS relocations, don't generate the |
| 7095 | GOT entry required. */ |
| 7096 | if (!(info->flags & DF_BIND_NOW)) |
| 7097 | { |
| 7098 | htab->dt_tlsdesc_got = htab->root.sgot->size; |
| 7099 | htab->root.sgot->size += GOT_ENTRY_SIZE; |
| 7100 | } |
| 7101 | } |
| 7102 | |
| 7103 | /* Init mapping symbols information to use later to distingush between |
| 7104 | code and data while scanning for erratam 835769. */ |
| 7105 | if (htab->fix_erratum_835769) |
| 7106 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
| 7107 | { |
| 7108 | if (!is_aarch64_elf (ibfd)) |
| 7109 | continue; |
| 7110 | bfd_elfNN_aarch64_init_maps (ibfd); |
| 7111 | } |
| 7112 | |
| 7113 | /* We now have determined the sizes of the various dynamic sections. |
| 7114 | Allocate memory for them. */ |
| 7115 | relocs = FALSE; |
| 7116 | for (s = dynobj->sections; s != NULL; s = s->next) |
| 7117 | { |
| 7118 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
| 7119 | continue; |
| 7120 | |
| 7121 | if (s == htab->root.splt |
| 7122 | || s == htab->root.sgot |
| 7123 | || s == htab->root.sgotplt |
| 7124 | || s == htab->root.iplt |
| 7125 | || s == htab->root.igotplt || s == htab->sdynbss) |
| 7126 | { |
| 7127 | /* Strip this section if we don't need it; see the |
| 7128 | comment below. */ |
| 7129 | } |
| 7130 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) |
| 7131 | { |
| 7132 | if (s->size != 0 && s != htab->root.srelplt) |
| 7133 | relocs = TRUE; |
| 7134 | |
| 7135 | /* We use the reloc_count field as a counter if we need |
| 7136 | to copy relocs into the output file. */ |
| 7137 | if (s != htab->root.srelplt) |
| 7138 | s->reloc_count = 0; |
| 7139 | } |
| 7140 | else |
| 7141 | { |
| 7142 | /* It's not one of our sections, so don't allocate space. */ |
| 7143 | continue; |
| 7144 | } |
| 7145 | |
| 7146 | if (s->size == 0) |
| 7147 | { |
| 7148 | /* If we don't need this section, strip it from the |
| 7149 | output file. This is mostly to handle .rela.bss and |
| 7150 | .rela.plt. We must create both sections in |
| 7151 | create_dynamic_sections, because they must be created |
| 7152 | before the linker maps input sections to output |
| 7153 | sections. The linker does that before |
| 7154 | adjust_dynamic_symbol is called, and it is that |
| 7155 | function which decides whether anything needs to go |
| 7156 | into these sections. */ |
| 7157 | |
| 7158 | s->flags |= SEC_EXCLUDE; |
| 7159 | continue; |
| 7160 | } |
| 7161 | |
| 7162 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
| 7163 | continue; |
| 7164 | |
| 7165 | /* Allocate memory for the section contents. We use bfd_zalloc |
| 7166 | here in case unused entries are not reclaimed before the |
| 7167 | section's contents are written out. This should not happen, |
| 7168 | but this way if it does, we get a R_AARCH64_NONE reloc instead |
| 7169 | of garbage. */ |
| 7170 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
| 7171 | if (s->contents == NULL) |
| 7172 | return FALSE; |
| 7173 | } |
| 7174 | |
| 7175 | if (htab->root.dynamic_sections_created) |
| 7176 | { |
| 7177 | /* Add some entries to the .dynamic section. We fill in the |
| 7178 | values later, in elfNN_aarch64_finish_dynamic_sections, but we |
| 7179 | must add the entries now so that we get the correct size for |
| 7180 | the .dynamic section. The DT_DEBUG entry is filled in by the |
| 7181 | dynamic linker and used by the debugger. */ |
| 7182 | #define add_dynamic_entry(TAG, VAL) \ |
| 7183 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
| 7184 | |
| 7185 | if (info->executable) |
| 7186 | { |
| 7187 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
| 7188 | return FALSE; |
| 7189 | } |
| 7190 | |
| 7191 | if (htab->root.splt->size != 0) |
| 7192 | { |
| 7193 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
| 7194 | || !add_dynamic_entry (DT_PLTRELSZ, 0) |
| 7195 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) |
| 7196 | || !add_dynamic_entry (DT_JMPREL, 0)) |
| 7197 | return FALSE; |
| 7198 | |
| 7199 | if (htab->tlsdesc_plt |
| 7200 | && (!add_dynamic_entry (DT_TLSDESC_PLT, 0) |
| 7201 | || !add_dynamic_entry (DT_TLSDESC_GOT, 0))) |
| 7202 | return FALSE; |
| 7203 | } |
| 7204 | |
| 7205 | if (relocs) |
| 7206 | { |
| 7207 | if (!add_dynamic_entry (DT_RELA, 0) |
| 7208 | || !add_dynamic_entry (DT_RELASZ, 0) |
| 7209 | || !add_dynamic_entry (DT_RELAENT, RELOC_SIZE (htab))) |
| 7210 | return FALSE; |
| 7211 | |
| 7212 | /* If any dynamic relocs apply to a read-only section, |
| 7213 | then we need a DT_TEXTREL entry. */ |
| 7214 | if ((info->flags & DF_TEXTREL) != 0) |
| 7215 | { |
| 7216 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
| 7217 | return FALSE; |
| 7218 | } |
| 7219 | } |
| 7220 | } |
| 7221 | #undef add_dynamic_entry |
| 7222 | |
| 7223 | return TRUE; |
| 7224 | } |
| 7225 | |
| 7226 | static inline void |
| 7227 | elf_aarch64_update_plt_entry (bfd *output_bfd, |
| 7228 | bfd_reloc_code_real_type r_type, |
| 7229 | bfd_byte *plt_entry, bfd_vma value) |
| 7230 | { |
| 7231 | reloc_howto_type *howto = elfNN_aarch64_howto_from_bfd_reloc (r_type); |
| 7232 | |
| 7233 | _bfd_aarch64_elf_put_addend (output_bfd, plt_entry, r_type, howto, value); |
| 7234 | } |
| 7235 | |
| 7236 | static void |
| 7237 | elfNN_aarch64_create_small_pltn_entry (struct elf_link_hash_entry *h, |
| 7238 | struct elf_aarch64_link_hash_table |
| 7239 | *htab, bfd *output_bfd, |
| 7240 | struct bfd_link_info *info) |
| 7241 | { |
| 7242 | bfd_byte *plt_entry; |
| 7243 | bfd_vma plt_index; |
| 7244 | bfd_vma got_offset; |
| 7245 | bfd_vma gotplt_entry_address; |
| 7246 | bfd_vma plt_entry_address; |
| 7247 | Elf_Internal_Rela rela; |
| 7248 | bfd_byte *loc; |
| 7249 | asection *plt, *gotplt, *relplt; |
| 7250 | |
| 7251 | /* When building a static executable, use .iplt, .igot.plt and |
| 7252 | .rela.iplt sections for STT_GNU_IFUNC symbols. */ |
| 7253 | if (htab->root.splt != NULL) |
| 7254 | { |
| 7255 | plt = htab->root.splt; |
| 7256 | gotplt = htab->root.sgotplt; |
| 7257 | relplt = htab->root.srelplt; |
| 7258 | } |
| 7259 | else |
| 7260 | { |
| 7261 | plt = htab->root.iplt; |
| 7262 | gotplt = htab->root.igotplt; |
| 7263 | relplt = htab->root.irelplt; |
| 7264 | } |
| 7265 | |
| 7266 | /* Get the index in the procedure linkage table which |
| 7267 | corresponds to this symbol. This is the index of this symbol |
| 7268 | in all the symbols for which we are making plt entries. The |
| 7269 | first entry in the procedure linkage table is reserved. |
| 7270 | |
| 7271 | Get the offset into the .got table of the entry that |
| 7272 | corresponds to this function. Each .got entry is GOT_ENTRY_SIZE |
| 7273 | bytes. The first three are reserved for the dynamic linker. |
| 7274 | |
| 7275 | For static executables, we don't reserve anything. */ |
| 7276 | |
| 7277 | if (plt == htab->root.splt) |
| 7278 | { |
| 7279 | plt_index = (h->plt.offset - htab->plt_header_size) / htab->plt_entry_size; |
| 7280 | got_offset = (plt_index + 3) * GOT_ENTRY_SIZE; |
| 7281 | } |
| 7282 | else |
| 7283 | { |
| 7284 | plt_index = h->plt.offset / htab->plt_entry_size; |
| 7285 | got_offset = plt_index * GOT_ENTRY_SIZE; |
| 7286 | } |
| 7287 | |
| 7288 | plt_entry = plt->contents + h->plt.offset; |
| 7289 | plt_entry_address = plt->output_section->vma |
| 7290 | + plt->output_offset + h->plt.offset; |
| 7291 | gotplt_entry_address = gotplt->output_section->vma + |
| 7292 | gotplt->output_offset + got_offset; |
| 7293 | |
| 7294 | /* Copy in the boiler-plate for the PLTn entry. */ |
| 7295 | memcpy (plt_entry, elfNN_aarch64_small_plt_entry, PLT_SMALL_ENTRY_SIZE); |
| 7296 | |
| 7297 | /* Fill in the top 21 bits for this: ADRP x16, PLT_GOT + n * 8. |
| 7298 | ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */ |
| 7299 | elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADR_HI21_PCREL, |
| 7300 | plt_entry, |
| 7301 | PG (gotplt_entry_address) - |
| 7302 | PG (plt_entry_address)); |
| 7303 | |
| 7304 | /* Fill in the lo12 bits for the load from the pltgot. */ |
| 7305 | elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_LDSTNN_LO12, |
| 7306 | plt_entry + 4, |
| 7307 | PG_OFFSET (gotplt_entry_address)); |
| 7308 | |
| 7309 | /* Fill in the lo12 bits for the add from the pltgot entry. */ |
| 7310 | elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADD_LO12, |
| 7311 | plt_entry + 8, |
| 7312 | PG_OFFSET (gotplt_entry_address)); |
| 7313 | |
| 7314 | /* All the GOTPLT Entries are essentially initialized to PLT0. */ |
| 7315 | bfd_put_NN (output_bfd, |
| 7316 | plt->output_section->vma + plt->output_offset, |
| 7317 | gotplt->contents + got_offset); |
| 7318 | |
| 7319 | rela.r_offset = gotplt_entry_address; |
| 7320 | |
| 7321 | if (h->dynindx == -1 |
| 7322 | || ((info->executable |
| 7323 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) |
| 7324 | && h->def_regular |
| 7325 | && h->type == STT_GNU_IFUNC)) |
| 7326 | { |
| 7327 | /* If an STT_GNU_IFUNC symbol is locally defined, generate |
| 7328 | R_AARCH64_IRELATIVE instead of R_AARCH64_JUMP_SLOT. */ |
| 7329 | rela.r_info = ELFNN_R_INFO (0, AARCH64_R (IRELATIVE)); |
| 7330 | rela.r_addend = (h->root.u.def.value |
| 7331 | + h->root.u.def.section->output_section->vma |
| 7332 | + h->root.u.def.section->output_offset); |
| 7333 | } |
| 7334 | else |
| 7335 | { |
| 7336 | /* Fill in the entry in the .rela.plt section. */ |
| 7337 | rela.r_info = ELFNN_R_INFO (h->dynindx, AARCH64_R (JUMP_SLOT)); |
| 7338 | rela.r_addend = 0; |
| 7339 | } |
| 7340 | |
| 7341 | /* Compute the relocation entry to used based on PLT index and do |
| 7342 | not adjust reloc_count. The reloc_count has already been adjusted |
| 7343 | to account for this entry. */ |
| 7344 | loc = relplt->contents + plt_index * RELOC_SIZE (htab); |
| 7345 | bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc); |
| 7346 | } |
| 7347 | |
| 7348 | /* Size sections even though they're not dynamic. We use it to setup |
| 7349 | _TLS_MODULE_BASE_, if needed. */ |
| 7350 | |
| 7351 | static bfd_boolean |
| 7352 | elfNN_aarch64_always_size_sections (bfd *output_bfd, |
| 7353 | struct bfd_link_info *info) |
| 7354 | { |
| 7355 | asection *tls_sec; |
| 7356 | |
| 7357 | if (info->relocatable) |
| 7358 | return TRUE; |
| 7359 | |
| 7360 | tls_sec = elf_hash_table (info)->tls_sec; |
| 7361 | |
| 7362 | if (tls_sec) |
| 7363 | { |
| 7364 | struct elf_link_hash_entry *tlsbase; |
| 7365 | |
| 7366 | tlsbase = elf_link_hash_lookup (elf_hash_table (info), |
| 7367 | "_TLS_MODULE_BASE_", TRUE, TRUE, FALSE); |
| 7368 | |
| 7369 | if (tlsbase) |
| 7370 | { |
| 7371 | struct bfd_link_hash_entry *h = NULL; |
| 7372 | const struct elf_backend_data *bed = |
| 7373 | get_elf_backend_data (output_bfd); |
| 7374 | |
| 7375 | if (!(_bfd_generic_link_add_one_symbol |
| 7376 | (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL, |
| 7377 | tls_sec, 0, NULL, FALSE, bed->collect, &h))) |
| 7378 | return FALSE; |
| 7379 | |
| 7380 | tlsbase->type = STT_TLS; |
| 7381 | tlsbase = (struct elf_link_hash_entry *) h; |
| 7382 | tlsbase->def_regular = 1; |
| 7383 | tlsbase->other = STV_HIDDEN; |
| 7384 | (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE); |
| 7385 | } |
| 7386 | } |
| 7387 | |
| 7388 | return TRUE; |
| 7389 | } |
| 7390 | |
| 7391 | /* Finish up dynamic symbol handling. We set the contents of various |
| 7392 | dynamic sections here. */ |
| 7393 | static bfd_boolean |
| 7394 | elfNN_aarch64_finish_dynamic_symbol (bfd *output_bfd, |
| 7395 | struct bfd_link_info *info, |
| 7396 | struct elf_link_hash_entry *h, |
| 7397 | Elf_Internal_Sym *sym) |
| 7398 | { |
| 7399 | struct elf_aarch64_link_hash_table *htab; |
| 7400 | htab = elf_aarch64_hash_table (info); |
| 7401 | |
| 7402 | if (h->plt.offset != (bfd_vma) - 1) |
| 7403 | { |
| 7404 | asection *plt, *gotplt, *relplt; |
| 7405 | |
| 7406 | /* This symbol has an entry in the procedure linkage table. Set |
| 7407 | it up. */ |
| 7408 | |
| 7409 | /* When building a static executable, use .iplt, .igot.plt and |
| 7410 | .rela.iplt sections for STT_GNU_IFUNC symbols. */ |
| 7411 | if (htab->root.splt != NULL) |
| 7412 | { |
| 7413 | plt = htab->root.splt; |
| 7414 | gotplt = htab->root.sgotplt; |
| 7415 | relplt = htab->root.srelplt; |
| 7416 | } |
| 7417 | else |
| 7418 | { |
| 7419 | plt = htab->root.iplt; |
| 7420 | gotplt = htab->root.igotplt; |
| 7421 | relplt = htab->root.irelplt; |
| 7422 | } |
| 7423 | |
| 7424 | /* This symbol has an entry in the procedure linkage table. Set |
| 7425 | it up. */ |
| 7426 | if ((h->dynindx == -1 |
| 7427 | && !((h->forced_local || info->executable) |
| 7428 | && h->def_regular |
| 7429 | && h->type == STT_GNU_IFUNC)) |
| 7430 | || plt == NULL |
| 7431 | || gotplt == NULL |
| 7432 | || relplt == NULL) |
| 7433 | abort (); |
| 7434 | |
| 7435 | elfNN_aarch64_create_small_pltn_entry (h, htab, output_bfd, info); |
| 7436 | if (!h->def_regular) |
| 7437 | { |
| 7438 | /* Mark the symbol as undefined, rather than as defined in |
| 7439 | the .plt section. */ |
| 7440 | sym->st_shndx = SHN_UNDEF; |
| 7441 | /* If the symbol is weak we need to clear the value. |
| 7442 | Otherwise, the PLT entry would provide a definition for |
| 7443 | the symbol even if the symbol wasn't defined anywhere, |
| 7444 | and so the symbol would never be NULL. Leave the value if |
| 7445 | there were any relocations where pointer equality matters |
| 7446 | (this is a clue for the dynamic linker, to make function |
| 7447 | pointer comparisons work between an application and shared |
| 7448 | library). */ |
| 7449 | if (!h->ref_regular_nonweak || !h->pointer_equality_needed) |
| 7450 | sym->st_value = 0; |
| 7451 | } |
| 7452 | } |
| 7453 | |
| 7454 | if (h->got.offset != (bfd_vma) - 1 |
| 7455 | && elf_aarch64_hash_entry (h)->got_type == GOT_NORMAL) |
| 7456 | { |
| 7457 | Elf_Internal_Rela rela; |
| 7458 | bfd_byte *loc; |
| 7459 | |
| 7460 | /* This symbol has an entry in the global offset table. Set it |
| 7461 | up. */ |
| 7462 | if (htab->root.sgot == NULL || htab->root.srelgot == NULL) |
| 7463 | abort (); |
| 7464 | |
| 7465 | rela.r_offset = (htab->root.sgot->output_section->vma |
| 7466 | + htab->root.sgot->output_offset |
| 7467 | + (h->got.offset & ~(bfd_vma) 1)); |
| 7468 | |
| 7469 | if (h->def_regular |
| 7470 | && h->type == STT_GNU_IFUNC) |
| 7471 | { |
| 7472 | if (info->shared) |
| 7473 | { |
| 7474 | /* Generate R_AARCH64_GLOB_DAT. */ |
| 7475 | goto do_glob_dat; |
| 7476 | } |
| 7477 | else |
| 7478 | { |
| 7479 | asection *plt; |
| 7480 | |
| 7481 | if (!h->pointer_equality_needed) |
| 7482 | abort (); |
| 7483 | |
| 7484 | /* For non-shared object, we can't use .got.plt, which |
| 7485 | contains the real function address if we need pointer |
| 7486 | equality. We load the GOT entry with the PLT entry. */ |
| 7487 | plt = htab->root.splt ? htab->root.splt : htab->root.iplt; |
| 7488 | bfd_put_NN (output_bfd, (plt->output_section->vma |
| 7489 | + plt->output_offset |
| 7490 | + h->plt.offset), |
| 7491 | htab->root.sgot->contents |
| 7492 | + (h->got.offset & ~(bfd_vma) 1)); |
| 7493 | return TRUE; |
| 7494 | } |
| 7495 | } |
| 7496 | else if (info->shared && SYMBOL_REFERENCES_LOCAL (info, h)) |
| 7497 | { |
| 7498 | if (!h->def_regular) |
| 7499 | return FALSE; |
| 7500 | |
| 7501 | BFD_ASSERT ((h->got.offset & 1) != 0); |
| 7502 | rela.r_info = ELFNN_R_INFO (0, AARCH64_R (RELATIVE)); |
| 7503 | rela.r_addend = (h->root.u.def.value |
| 7504 | + h->root.u.def.section->output_section->vma |
| 7505 | + h->root.u.def.section->output_offset); |
| 7506 | } |
| 7507 | else |
| 7508 | { |
| 7509 | do_glob_dat: |
| 7510 | BFD_ASSERT ((h->got.offset & 1) == 0); |
| 7511 | bfd_put_NN (output_bfd, (bfd_vma) 0, |
| 7512 | htab->root.sgot->contents + h->got.offset); |
| 7513 | rela.r_info = ELFNN_R_INFO (h->dynindx, AARCH64_R (GLOB_DAT)); |
| 7514 | rela.r_addend = 0; |
| 7515 | } |
| 7516 | |
| 7517 | loc = htab->root.srelgot->contents; |
| 7518 | loc += htab->root.srelgot->reloc_count++ * RELOC_SIZE (htab); |
| 7519 | bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc); |
| 7520 | } |
| 7521 | |
| 7522 | if (h->needs_copy) |
| 7523 | { |
| 7524 | Elf_Internal_Rela rela; |
| 7525 | bfd_byte *loc; |
| 7526 | |
| 7527 | /* This symbol needs a copy reloc. Set it up. */ |
| 7528 | |
| 7529 | if (h->dynindx == -1 |
| 7530 | || (h->root.type != bfd_link_hash_defined |
| 7531 | && h->root.type != bfd_link_hash_defweak) |
| 7532 | || htab->srelbss == NULL) |
| 7533 | abort (); |
| 7534 | |
| 7535 | rela.r_offset = (h->root.u.def.value |
| 7536 | + h->root.u.def.section->output_section->vma |
| 7537 | + h->root.u.def.section->output_offset); |
| 7538 | rela.r_info = ELFNN_R_INFO (h->dynindx, AARCH64_R (COPY)); |
| 7539 | rela.r_addend = 0; |
| 7540 | loc = htab->srelbss->contents; |
| 7541 | loc += htab->srelbss->reloc_count++ * RELOC_SIZE (htab); |
| 7542 | bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc); |
| 7543 | } |
| 7544 | |
| 7545 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. SYM may |
| 7546 | be NULL for local symbols. */ |
| 7547 | if (sym != NULL |
| 7548 | && (h == elf_hash_table (info)->hdynamic |
| 7549 | || h == elf_hash_table (info)->hgot)) |
| 7550 | sym->st_shndx = SHN_ABS; |
| 7551 | |
| 7552 | return TRUE; |
| 7553 | } |
| 7554 | |
| 7555 | /* Finish up local dynamic symbol handling. We set the contents of |
| 7556 | various dynamic sections here. */ |
| 7557 | |
| 7558 | static bfd_boolean |
| 7559 | elfNN_aarch64_finish_local_dynamic_symbol (void **slot, void *inf) |
| 7560 | { |
| 7561 | struct elf_link_hash_entry *h |
| 7562 | = (struct elf_link_hash_entry *) *slot; |
| 7563 | struct bfd_link_info *info |
| 7564 | = (struct bfd_link_info *) inf; |
| 7565 | |
| 7566 | return elfNN_aarch64_finish_dynamic_symbol (info->output_bfd, |
| 7567 | info, h, NULL); |
| 7568 | } |
| 7569 | |
| 7570 | static void |
| 7571 | elfNN_aarch64_init_small_plt0_entry (bfd *output_bfd ATTRIBUTE_UNUSED, |
| 7572 | struct elf_aarch64_link_hash_table |
| 7573 | *htab) |
| 7574 | { |
| 7575 | /* Fill in PLT0. Fixme:RR Note this doesn't distinguish between |
| 7576 | small and large plts and at the minute just generates |
| 7577 | the small PLT. */ |
| 7578 | |
| 7579 | /* PLT0 of the small PLT looks like this in ELF64 - |
| 7580 | stp x16, x30, [sp, #-16]! // Save the reloc and lr on stack. |
| 7581 | adrp x16, PLT_GOT + 16 // Get the page base of the GOTPLT |
| 7582 | ldr x17, [x16, #:lo12:PLT_GOT+16] // Load the address of the |
| 7583 | // symbol resolver |
| 7584 | add x16, x16, #:lo12:PLT_GOT+16 // Load the lo12 bits of the |
| 7585 | // GOTPLT entry for this. |
| 7586 | br x17 |
| 7587 | PLT0 will be slightly different in ELF32 due to different got entry |
| 7588 | size. |
| 7589 | */ |
| 7590 | bfd_vma plt_got_2nd_ent; /* Address of GOT[2]. */ |
| 7591 | bfd_vma plt_base; |
| 7592 | |
| 7593 | |
| 7594 | memcpy (htab->root.splt->contents, elfNN_aarch64_small_plt0_entry, |
| 7595 | PLT_ENTRY_SIZE); |
| 7596 | elf_section_data (htab->root.splt->output_section)->this_hdr.sh_entsize = |
| 7597 | PLT_ENTRY_SIZE; |
| 7598 | |
| 7599 | plt_got_2nd_ent = (htab->root.sgotplt->output_section->vma |
| 7600 | + htab->root.sgotplt->output_offset |
| 7601 | + GOT_ENTRY_SIZE * 2); |
| 7602 | |
| 7603 | plt_base = htab->root.splt->output_section->vma + |
| 7604 | htab->root.splt->output_offset; |
| 7605 | |
| 7606 | /* Fill in the top 21 bits for this: ADRP x16, PLT_GOT + n * 8. |
| 7607 | ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */ |
| 7608 | elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADR_HI21_PCREL, |
| 7609 | htab->root.splt->contents + 4, |
| 7610 | PG (plt_got_2nd_ent) - PG (plt_base + 4)); |
| 7611 | |
| 7612 | elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_LDSTNN_LO12, |
| 7613 | htab->root.splt->contents + 8, |
| 7614 | PG_OFFSET (plt_got_2nd_ent)); |
| 7615 | |
| 7616 | elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADD_LO12, |
| 7617 | htab->root.splt->contents + 12, |
| 7618 | PG_OFFSET (plt_got_2nd_ent)); |
| 7619 | } |
| 7620 | |
| 7621 | static bfd_boolean |
| 7622 | elfNN_aarch64_finish_dynamic_sections (bfd *output_bfd, |
| 7623 | struct bfd_link_info *info) |
| 7624 | { |
| 7625 | struct elf_aarch64_link_hash_table *htab; |
| 7626 | bfd *dynobj; |
| 7627 | asection *sdyn; |
| 7628 | |
| 7629 | htab = elf_aarch64_hash_table (info); |
| 7630 | dynobj = htab->root.dynobj; |
| 7631 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
| 7632 | |
| 7633 | if (htab->root.dynamic_sections_created) |
| 7634 | { |
| 7635 | ElfNN_External_Dyn *dyncon, *dynconend; |
| 7636 | |
| 7637 | if (sdyn == NULL || htab->root.sgot == NULL) |
| 7638 | abort (); |
| 7639 | |
| 7640 | dyncon = (ElfNN_External_Dyn *) sdyn->contents; |
| 7641 | dynconend = (ElfNN_External_Dyn *) (sdyn->contents + sdyn->size); |
| 7642 | for (; dyncon < dynconend; dyncon++) |
| 7643 | { |
| 7644 | Elf_Internal_Dyn dyn; |
| 7645 | asection *s; |
| 7646 | |
| 7647 | bfd_elfNN_swap_dyn_in (dynobj, dyncon, &dyn); |
| 7648 | |
| 7649 | switch (dyn.d_tag) |
| 7650 | { |
| 7651 | default: |
| 7652 | continue; |
| 7653 | |
| 7654 | case DT_PLTGOT: |
| 7655 | s = htab->root.sgotplt; |
| 7656 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
| 7657 | break; |
| 7658 | |
| 7659 | case DT_JMPREL: |
| 7660 | dyn.d_un.d_ptr = htab->root.srelplt->output_section->vma; |
| 7661 | break; |
| 7662 | |
| 7663 | case DT_PLTRELSZ: |
| 7664 | s = htab->root.srelplt; |
| 7665 | dyn.d_un.d_val = s->size; |
| 7666 | break; |
| 7667 | |
| 7668 | case DT_RELASZ: |
| 7669 | /* The procedure linkage table relocs (DT_JMPREL) should |
| 7670 | not be included in the overall relocs (DT_RELA). |
| 7671 | Therefore, we override the DT_RELASZ entry here to |
| 7672 | make it not include the JMPREL relocs. Since the |
| 7673 | linker script arranges for .rela.plt to follow all |
| 7674 | other relocation sections, we don't have to worry |
| 7675 | about changing the DT_RELA entry. */ |
| 7676 | if (htab->root.srelplt != NULL) |
| 7677 | { |
| 7678 | s = htab->root.srelplt; |
| 7679 | dyn.d_un.d_val -= s->size; |
| 7680 | } |
| 7681 | break; |
| 7682 | |
| 7683 | case DT_TLSDESC_PLT: |
| 7684 | s = htab->root.splt; |
| 7685 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
| 7686 | + htab->tlsdesc_plt; |
| 7687 | break; |
| 7688 | |
| 7689 | case DT_TLSDESC_GOT: |
| 7690 | s = htab->root.sgot; |
| 7691 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
| 7692 | + htab->dt_tlsdesc_got; |
| 7693 | break; |
| 7694 | } |
| 7695 | |
| 7696 | bfd_elfNN_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 7697 | } |
| 7698 | |
| 7699 | } |
| 7700 | |
| 7701 | /* Fill in the special first entry in the procedure linkage table. */ |
| 7702 | if (htab->root.splt && htab->root.splt->size > 0) |
| 7703 | { |
| 7704 | elfNN_aarch64_init_small_plt0_entry (output_bfd, htab); |
| 7705 | |
| 7706 | elf_section_data (htab->root.splt->output_section)-> |
| 7707 | this_hdr.sh_entsize = htab->plt_entry_size; |
| 7708 | |
| 7709 | |
| 7710 | if (htab->tlsdesc_plt) |
| 7711 | { |
| 7712 | bfd_put_NN (output_bfd, (bfd_vma) 0, |
| 7713 | htab->root.sgot->contents + htab->dt_tlsdesc_got); |
| 7714 | |
| 7715 | memcpy (htab->root.splt->contents + htab->tlsdesc_plt, |
| 7716 | elfNN_aarch64_tlsdesc_small_plt_entry, |
| 7717 | sizeof (elfNN_aarch64_tlsdesc_small_plt_entry)); |
| 7718 | |
| 7719 | { |
| 7720 | bfd_vma adrp1_addr = |
| 7721 | htab->root.splt->output_section->vma |
| 7722 | + htab->root.splt->output_offset + htab->tlsdesc_plt + 4; |
| 7723 | |
| 7724 | bfd_vma adrp2_addr = adrp1_addr + 4; |
| 7725 | |
| 7726 | bfd_vma got_addr = |
| 7727 | htab->root.sgot->output_section->vma |
| 7728 | + htab->root.sgot->output_offset; |
| 7729 | |
| 7730 | bfd_vma pltgot_addr = |
| 7731 | htab->root.sgotplt->output_section->vma |
| 7732 | + htab->root.sgotplt->output_offset; |
| 7733 | |
| 7734 | bfd_vma dt_tlsdesc_got = got_addr + htab->dt_tlsdesc_got; |
| 7735 | |
| 7736 | bfd_byte *plt_entry = |
| 7737 | htab->root.splt->contents + htab->tlsdesc_plt; |
| 7738 | |
| 7739 | /* adrp x2, DT_TLSDESC_GOT */ |
| 7740 | elf_aarch64_update_plt_entry (output_bfd, |
| 7741 | BFD_RELOC_AARCH64_ADR_HI21_PCREL, |
| 7742 | plt_entry + 4, |
| 7743 | (PG (dt_tlsdesc_got) |
| 7744 | - PG (adrp1_addr))); |
| 7745 | |
| 7746 | /* adrp x3, 0 */ |
| 7747 | elf_aarch64_update_plt_entry (output_bfd, |
| 7748 | BFD_RELOC_AARCH64_ADR_HI21_PCREL, |
| 7749 | plt_entry + 8, |
| 7750 | (PG (pltgot_addr) |
| 7751 | - PG (adrp2_addr))); |
| 7752 | |
| 7753 | /* ldr x2, [x2, #0] */ |
| 7754 | elf_aarch64_update_plt_entry (output_bfd, |
| 7755 | BFD_RELOC_AARCH64_LDSTNN_LO12, |
| 7756 | plt_entry + 12, |
| 7757 | PG_OFFSET (dt_tlsdesc_got)); |
| 7758 | |
| 7759 | /* add x3, x3, 0 */ |
| 7760 | elf_aarch64_update_plt_entry (output_bfd, |
| 7761 | BFD_RELOC_AARCH64_ADD_LO12, |
| 7762 | plt_entry + 16, |
| 7763 | PG_OFFSET (pltgot_addr)); |
| 7764 | } |
| 7765 | } |
| 7766 | } |
| 7767 | |
| 7768 | if (htab->root.sgotplt) |
| 7769 | { |
| 7770 | if (bfd_is_abs_section (htab->root.sgotplt->output_section)) |
| 7771 | { |
| 7772 | (*_bfd_error_handler) |
| 7773 | (_("discarded output section: `%A'"), htab->root.sgotplt); |
| 7774 | return FALSE; |
| 7775 | } |
| 7776 | |
| 7777 | /* Fill in the first three entries in the global offset table. */ |
| 7778 | if (htab->root.sgotplt->size > 0) |
| 7779 | { |
| 7780 | bfd_put_NN (output_bfd, (bfd_vma) 0, htab->root.sgotplt->contents); |
| 7781 | |
| 7782 | /* Write GOT[1] and GOT[2], needed for the dynamic linker. */ |
| 7783 | bfd_put_NN (output_bfd, |
| 7784 | (bfd_vma) 0, |
| 7785 | htab->root.sgotplt->contents + GOT_ENTRY_SIZE); |
| 7786 | bfd_put_NN (output_bfd, |
| 7787 | (bfd_vma) 0, |
| 7788 | htab->root.sgotplt->contents + GOT_ENTRY_SIZE * 2); |
| 7789 | } |
| 7790 | |
| 7791 | if (htab->root.sgot) |
| 7792 | { |
| 7793 | if (htab->root.sgot->size > 0) |
| 7794 | { |
| 7795 | bfd_vma addr = |
| 7796 | sdyn ? sdyn->output_section->vma + sdyn->output_offset : 0; |
| 7797 | bfd_put_NN (output_bfd, addr, htab->root.sgot->contents); |
| 7798 | } |
| 7799 | } |
| 7800 | |
| 7801 | elf_section_data (htab->root.sgotplt->output_section)-> |
| 7802 | this_hdr.sh_entsize = GOT_ENTRY_SIZE; |
| 7803 | } |
| 7804 | |
| 7805 | if (htab->root.sgot && htab->root.sgot->size > 0) |
| 7806 | elf_section_data (htab->root.sgot->output_section)->this_hdr.sh_entsize |
| 7807 | = GOT_ENTRY_SIZE; |
| 7808 | |
| 7809 | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ |
| 7810 | htab_traverse (htab->loc_hash_table, |
| 7811 | elfNN_aarch64_finish_local_dynamic_symbol, |
| 7812 | info); |
| 7813 | |
| 7814 | return TRUE; |
| 7815 | } |
| 7816 | |
| 7817 | /* Return address for Ith PLT stub in section PLT, for relocation REL |
| 7818 | or (bfd_vma) -1 if it should not be included. */ |
| 7819 | |
| 7820 | static bfd_vma |
| 7821 | elfNN_aarch64_plt_sym_val (bfd_vma i, const asection *plt, |
| 7822 | const arelent *rel ATTRIBUTE_UNUSED) |
| 7823 | { |
| 7824 | return plt->vma + PLT_ENTRY_SIZE + i * PLT_SMALL_ENTRY_SIZE; |
| 7825 | } |
| 7826 | |
| 7827 | |
| 7828 | /* We use this so we can override certain functions |
| 7829 | (though currently we don't). */ |
| 7830 | |
| 7831 | const struct elf_size_info elfNN_aarch64_size_info = |
| 7832 | { |
| 7833 | sizeof (ElfNN_External_Ehdr), |
| 7834 | sizeof (ElfNN_External_Phdr), |
| 7835 | sizeof (ElfNN_External_Shdr), |
| 7836 | sizeof (ElfNN_External_Rel), |
| 7837 | sizeof (ElfNN_External_Rela), |
| 7838 | sizeof (ElfNN_External_Sym), |
| 7839 | sizeof (ElfNN_External_Dyn), |
| 7840 | sizeof (Elf_External_Note), |
| 7841 | 4, /* Hash table entry size. */ |
| 7842 | 1, /* Internal relocs per external relocs. */ |
| 7843 | ARCH_SIZE, /* Arch size. */ |
| 7844 | LOG_FILE_ALIGN, /* Log_file_align. */ |
| 7845 | ELFCLASSNN, EV_CURRENT, |
| 7846 | bfd_elfNN_write_out_phdrs, |
| 7847 | bfd_elfNN_write_shdrs_and_ehdr, |
| 7848 | bfd_elfNN_checksum_contents, |
| 7849 | bfd_elfNN_write_relocs, |
| 7850 | bfd_elfNN_swap_symbol_in, |
| 7851 | bfd_elfNN_swap_symbol_out, |
| 7852 | bfd_elfNN_slurp_reloc_table, |
| 7853 | bfd_elfNN_slurp_symbol_table, |
| 7854 | bfd_elfNN_swap_dyn_in, |
| 7855 | bfd_elfNN_swap_dyn_out, |
| 7856 | bfd_elfNN_swap_reloc_in, |
| 7857 | bfd_elfNN_swap_reloc_out, |
| 7858 | bfd_elfNN_swap_reloca_in, |
| 7859 | bfd_elfNN_swap_reloca_out |
| 7860 | }; |
| 7861 | |
| 7862 | #define ELF_ARCH bfd_arch_aarch64 |
| 7863 | #define ELF_MACHINE_CODE EM_AARCH64 |
| 7864 | #define ELF_MAXPAGESIZE 0x10000 |
| 7865 | #define ELF_MINPAGESIZE 0x1000 |
| 7866 | #define ELF_COMMONPAGESIZE 0x1000 |
| 7867 | |
| 7868 | #define bfd_elfNN_close_and_cleanup \ |
| 7869 | elfNN_aarch64_close_and_cleanup |
| 7870 | |
| 7871 | #define bfd_elfNN_bfd_free_cached_info \ |
| 7872 | elfNN_aarch64_bfd_free_cached_info |
| 7873 | |
| 7874 | #define bfd_elfNN_bfd_is_target_special_symbol \ |
| 7875 | elfNN_aarch64_is_target_special_symbol |
| 7876 | |
| 7877 | #define bfd_elfNN_bfd_link_hash_table_create \ |
| 7878 | elfNN_aarch64_link_hash_table_create |
| 7879 | |
| 7880 | #define bfd_elfNN_bfd_merge_private_bfd_data \ |
| 7881 | elfNN_aarch64_merge_private_bfd_data |
| 7882 | |
| 7883 | #define bfd_elfNN_bfd_print_private_bfd_data \ |
| 7884 | elfNN_aarch64_print_private_bfd_data |
| 7885 | |
| 7886 | #define bfd_elfNN_bfd_reloc_type_lookup \ |
| 7887 | elfNN_aarch64_reloc_type_lookup |
| 7888 | |
| 7889 | #define bfd_elfNN_bfd_reloc_name_lookup \ |
| 7890 | elfNN_aarch64_reloc_name_lookup |
| 7891 | |
| 7892 | #define bfd_elfNN_bfd_set_private_flags \ |
| 7893 | elfNN_aarch64_set_private_flags |
| 7894 | |
| 7895 | #define bfd_elfNN_find_inliner_info \ |
| 7896 | elfNN_aarch64_find_inliner_info |
| 7897 | |
| 7898 | #define bfd_elfNN_find_nearest_line \ |
| 7899 | elfNN_aarch64_find_nearest_line |
| 7900 | |
| 7901 | #define bfd_elfNN_mkobject \ |
| 7902 | elfNN_aarch64_mkobject |
| 7903 | |
| 7904 | #define bfd_elfNN_new_section_hook \ |
| 7905 | elfNN_aarch64_new_section_hook |
| 7906 | |
| 7907 | #define elf_backend_adjust_dynamic_symbol \ |
| 7908 | elfNN_aarch64_adjust_dynamic_symbol |
| 7909 | |
| 7910 | #define elf_backend_always_size_sections \ |
| 7911 | elfNN_aarch64_always_size_sections |
| 7912 | |
| 7913 | #define elf_backend_check_relocs \ |
| 7914 | elfNN_aarch64_check_relocs |
| 7915 | |
| 7916 | #define elf_backend_copy_indirect_symbol \ |
| 7917 | elfNN_aarch64_copy_indirect_symbol |
| 7918 | |
| 7919 | /* Create .dynbss, and .rela.bss sections in DYNOBJ, and set up shortcuts |
| 7920 | to them in our hash. */ |
| 7921 | #define elf_backend_create_dynamic_sections \ |
| 7922 | elfNN_aarch64_create_dynamic_sections |
| 7923 | |
| 7924 | #define elf_backend_init_index_section \ |
| 7925 | _bfd_elf_init_2_index_sections |
| 7926 | |
| 7927 | #define elf_backend_finish_dynamic_sections \ |
| 7928 | elfNN_aarch64_finish_dynamic_sections |
| 7929 | |
| 7930 | #define elf_backend_finish_dynamic_symbol \ |
| 7931 | elfNN_aarch64_finish_dynamic_symbol |
| 7932 | |
| 7933 | #define elf_backend_gc_sweep_hook \ |
| 7934 | elfNN_aarch64_gc_sweep_hook |
| 7935 | |
| 7936 | #define elf_backend_object_p \ |
| 7937 | elfNN_aarch64_object_p |
| 7938 | |
| 7939 | #define elf_backend_output_arch_local_syms \ |
| 7940 | elfNN_aarch64_output_arch_local_syms |
| 7941 | |
| 7942 | #define elf_backend_plt_sym_val \ |
| 7943 | elfNN_aarch64_plt_sym_val |
| 7944 | |
| 7945 | #define elf_backend_post_process_headers \ |
| 7946 | elfNN_aarch64_post_process_headers |
| 7947 | |
| 7948 | #define elf_backend_relocate_section \ |
| 7949 | elfNN_aarch64_relocate_section |
| 7950 | |
| 7951 | #define elf_backend_reloc_type_class \ |
| 7952 | elfNN_aarch64_reloc_type_class |
| 7953 | |
| 7954 | #define elf_backend_section_from_shdr \ |
| 7955 | elfNN_aarch64_section_from_shdr |
| 7956 | |
| 7957 | #define elf_backend_size_dynamic_sections \ |
| 7958 | elfNN_aarch64_size_dynamic_sections |
| 7959 | |
| 7960 | #define elf_backend_size_info \ |
| 7961 | elfNN_aarch64_size_info |
| 7962 | |
| 7963 | #define elf_backend_write_section \ |
| 7964 | elfNN_aarch64_write_section |
| 7965 | |
| 7966 | #define elf_backend_can_refcount 1 |
| 7967 | #define elf_backend_can_gc_sections 1 |
| 7968 | #define elf_backend_plt_readonly 1 |
| 7969 | #define elf_backend_want_got_plt 1 |
| 7970 | #define elf_backend_want_plt_sym 0 |
| 7971 | #define elf_backend_may_use_rel_p 0 |
| 7972 | #define elf_backend_may_use_rela_p 1 |
| 7973 | #define elf_backend_default_use_rela_p 1 |
| 7974 | #define elf_backend_rela_normal 1 |
| 7975 | #define elf_backend_got_header_size (GOT_ENTRY_SIZE * 3) |
| 7976 | #define elf_backend_default_execstack 0 |
| 7977 | |
| 7978 | #undef elf_backend_obj_attrs_section |
| 7979 | #define elf_backend_obj_attrs_section ".ARM.attributes" |
| 7980 | |
| 7981 | #include "elfNN-target.h" |