| 1 | // reloc.cc -- relocate input files for gold. |
| 2 | |
| 3 | // Copyright 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc. |
| 4 | // Written by Ian Lance Taylor <iant@google.com>. |
| 5 | |
| 6 | // This file is part of gold. |
| 7 | |
| 8 | // This program is free software; you can redistribute it and/or modify |
| 9 | // it under the terms of the GNU General Public License as published by |
| 10 | // the Free Software Foundation; either version 3 of the License, or |
| 11 | // (at your option) any later version. |
| 12 | |
| 13 | // This program is distributed in the hope that it will be useful, |
| 14 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | // GNU General Public License for more details. |
| 17 | |
| 18 | // You should have received a copy of the GNU General Public License |
| 19 | // along with this program; if not, write to the Free Software |
| 20 | // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 21 | // MA 02110-1301, USA. |
| 22 | |
| 23 | #include "gold.h" |
| 24 | |
| 25 | #include <algorithm> |
| 26 | |
| 27 | #include "workqueue.h" |
| 28 | #include "layout.h" |
| 29 | #include "symtab.h" |
| 30 | #include "output.h" |
| 31 | #include "merge.h" |
| 32 | #include "object.h" |
| 33 | #include "target-reloc.h" |
| 34 | #include "reloc.h" |
| 35 | #include "icf.h" |
| 36 | #include "compressed_output.h" |
| 37 | #include "incremental.h" |
| 38 | |
| 39 | namespace gold |
| 40 | { |
| 41 | |
| 42 | // Read_relocs methods. |
| 43 | |
| 44 | // These tasks just read the relocation information from the file. |
| 45 | // After reading it, the start another task to process the |
| 46 | // information. These tasks requires access to the file. |
| 47 | |
| 48 | Task_token* |
| 49 | Read_relocs::is_runnable() |
| 50 | { |
| 51 | return this->object_->is_locked() ? this->object_->token() : NULL; |
| 52 | } |
| 53 | |
| 54 | // Lock the file. |
| 55 | |
| 56 | void |
| 57 | Read_relocs::locks(Task_locker* tl) |
| 58 | { |
| 59 | Task_token* token = this->object_->token(); |
| 60 | if (token != NULL) |
| 61 | tl->add(this, token); |
| 62 | } |
| 63 | |
| 64 | // Read the relocations and then start a Scan_relocs_task. |
| 65 | |
| 66 | void |
| 67 | Read_relocs::run(Workqueue* workqueue) |
| 68 | { |
| 69 | Read_relocs_data* rd = new Read_relocs_data; |
| 70 | this->object_->read_relocs(rd); |
| 71 | this->object_->set_relocs_data(rd); |
| 72 | this->object_->release(); |
| 73 | |
| 74 | // If garbage collection or identical comdat folding is desired, we |
| 75 | // process the relocs first before scanning them. Scanning of relocs is |
| 76 | // done only after garbage or identical sections is identified. |
| 77 | if (parameters->options().gc_sections() |
| 78 | || parameters->options().icf_enabled()) |
| 79 | { |
| 80 | workqueue->queue_next(new Gc_process_relocs(this->symtab_, |
| 81 | this->layout_, |
| 82 | this->object_, rd, |
| 83 | this->this_blocker_, |
| 84 | this->next_blocker_)); |
| 85 | } |
| 86 | else |
| 87 | { |
| 88 | workqueue->queue_next(new Scan_relocs(this->symtab_, this->layout_, |
| 89 | this->object_, rd, |
| 90 | this->this_blocker_, |
| 91 | this->next_blocker_)); |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | // Return a debugging name for the task. |
| 96 | |
| 97 | std::string |
| 98 | Read_relocs::get_name() const |
| 99 | { |
| 100 | return "Read_relocs " + this->object_->name(); |
| 101 | } |
| 102 | |
| 103 | // Gc_process_relocs methods. |
| 104 | |
| 105 | Gc_process_relocs::~Gc_process_relocs() |
| 106 | { |
| 107 | if (this->this_blocker_ != NULL) |
| 108 | delete this->this_blocker_; |
| 109 | } |
| 110 | |
| 111 | // These tasks process the relocations read by Read_relocs and |
| 112 | // determine which sections are referenced and which are garbage. |
| 113 | // This task is done only when --gc-sections is used. This is blocked |
| 114 | // by THIS_BLOCKER_. It unblocks NEXT_BLOCKER_. |
| 115 | |
| 116 | Task_token* |
| 117 | Gc_process_relocs::is_runnable() |
| 118 | { |
| 119 | if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked()) |
| 120 | return this->this_blocker_; |
| 121 | if (this->object_->is_locked()) |
| 122 | return this->object_->token(); |
| 123 | return NULL; |
| 124 | } |
| 125 | |
| 126 | void |
| 127 | Gc_process_relocs::locks(Task_locker* tl) |
| 128 | { |
| 129 | tl->add(this, this->object_->token()); |
| 130 | tl->add(this, this->next_blocker_); |
| 131 | } |
| 132 | |
| 133 | void |
| 134 | Gc_process_relocs::run(Workqueue*) |
| 135 | { |
| 136 | this->object_->gc_process_relocs(this->symtab_, this->layout_, this->rd_); |
| 137 | this->object_->release(); |
| 138 | } |
| 139 | |
| 140 | // Return a debugging name for the task. |
| 141 | |
| 142 | std::string |
| 143 | Gc_process_relocs::get_name() const |
| 144 | { |
| 145 | return "Gc_process_relocs " + this->object_->name(); |
| 146 | } |
| 147 | |
| 148 | // Scan_relocs methods. |
| 149 | |
| 150 | Scan_relocs::~Scan_relocs() |
| 151 | { |
| 152 | if (this->this_blocker_ != NULL) |
| 153 | delete this->this_blocker_; |
| 154 | } |
| 155 | |
| 156 | // These tasks scan the relocations read by Read_relocs and mark up |
| 157 | // the symbol table to indicate which relocations are required. We |
| 158 | // use a lock on the symbol table to keep them from interfering with |
| 159 | // each other. |
| 160 | |
| 161 | Task_token* |
| 162 | Scan_relocs::is_runnable() |
| 163 | { |
| 164 | if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked()) |
| 165 | return this->this_blocker_; |
| 166 | if (this->object_->is_locked()) |
| 167 | return this->object_->token(); |
| 168 | return NULL; |
| 169 | } |
| 170 | |
| 171 | // Return the locks we hold: one on the file, one on the symbol table |
| 172 | // and one blocker. |
| 173 | |
| 174 | void |
| 175 | Scan_relocs::locks(Task_locker* tl) |
| 176 | { |
| 177 | Task_token* token = this->object_->token(); |
| 178 | if (token != NULL) |
| 179 | tl->add(this, token); |
| 180 | tl->add(this, this->next_blocker_); |
| 181 | } |
| 182 | |
| 183 | // Scan the relocs. |
| 184 | |
| 185 | void |
| 186 | Scan_relocs::run(Workqueue*) |
| 187 | { |
| 188 | this->object_->scan_relocs(this->symtab_, this->layout_, this->rd_); |
| 189 | delete this->rd_; |
| 190 | this->rd_ = NULL; |
| 191 | this->object_->release(); |
| 192 | } |
| 193 | |
| 194 | // Return a debugging name for the task. |
| 195 | |
| 196 | std::string |
| 197 | Scan_relocs::get_name() const |
| 198 | { |
| 199 | return "Scan_relocs " + this->object_->name(); |
| 200 | } |
| 201 | |
| 202 | // Relocate_task methods. |
| 203 | |
| 204 | // We may have to wait for the output sections to be written. |
| 205 | |
| 206 | Task_token* |
| 207 | Relocate_task::is_runnable() |
| 208 | { |
| 209 | if (this->object_->relocs_must_follow_section_writes() |
| 210 | && this->output_sections_blocker_->is_blocked()) |
| 211 | return this->output_sections_blocker_; |
| 212 | |
| 213 | if (this->object_->is_locked()) |
| 214 | return this->object_->token(); |
| 215 | |
| 216 | return NULL; |
| 217 | } |
| 218 | |
| 219 | // We want to lock the file while we run. We want to unblock |
| 220 | // INPUT_SECTIONS_BLOCKER and FINAL_BLOCKER when we are done. |
| 221 | // INPUT_SECTIONS_BLOCKER may be NULL. |
| 222 | |
| 223 | void |
| 224 | Relocate_task::locks(Task_locker* tl) |
| 225 | { |
| 226 | if (this->input_sections_blocker_ != NULL) |
| 227 | tl->add(this, this->input_sections_blocker_); |
| 228 | tl->add(this, this->final_blocker_); |
| 229 | Task_token* token = this->object_->token(); |
| 230 | if (token != NULL) |
| 231 | tl->add(this, token); |
| 232 | } |
| 233 | |
| 234 | // Run the task. |
| 235 | |
| 236 | void |
| 237 | Relocate_task::run(Workqueue*) |
| 238 | { |
| 239 | this->object_->relocate(this->symtab_, this->layout_, this->of_); |
| 240 | |
| 241 | // This is normally the last thing we will do with an object, so |
| 242 | // uncache all views. |
| 243 | this->object_->clear_view_cache_marks(); |
| 244 | |
| 245 | this->object_->release(); |
| 246 | } |
| 247 | |
| 248 | // Return a debugging name for the task. |
| 249 | |
| 250 | std::string |
| 251 | Relocate_task::get_name() const |
| 252 | { |
| 253 | return "Relocate_task " + this->object_->name(); |
| 254 | } |
| 255 | |
| 256 | // Read the relocs and local symbols from the object file and store |
| 257 | // the information in RD. |
| 258 | |
| 259 | template<int size, bool big_endian> |
| 260 | void |
| 261 | Sized_relobj_file<size, big_endian>::do_read_relocs(Read_relocs_data* rd) |
| 262 | { |
| 263 | rd->relocs.clear(); |
| 264 | |
| 265 | unsigned int shnum = this->shnum(); |
| 266 | if (shnum == 0) |
| 267 | return; |
| 268 | |
| 269 | rd->relocs.reserve(shnum / 2); |
| 270 | |
| 271 | const Output_sections& out_sections(this->output_sections()); |
| 272 | const std::vector<Address>& out_offsets(this->section_offsets()); |
| 273 | |
| 274 | const unsigned char* pshdrs = this->get_view(this->elf_file_.shoff(), |
| 275 | shnum * This::shdr_size, |
| 276 | true, true); |
| 277 | // Skip the first, dummy, section. |
| 278 | const unsigned char* ps = pshdrs + This::shdr_size; |
| 279 | for (unsigned int i = 1; i < shnum; ++i, ps += This::shdr_size) |
| 280 | { |
| 281 | typename This::Shdr shdr(ps); |
| 282 | |
| 283 | unsigned int sh_type = shdr.get_sh_type(); |
| 284 | if (sh_type != elfcpp::SHT_REL && sh_type != elfcpp::SHT_RELA) |
| 285 | continue; |
| 286 | |
| 287 | unsigned int shndx = this->adjust_shndx(shdr.get_sh_info()); |
| 288 | if (shndx >= shnum) |
| 289 | { |
| 290 | this->error(_("relocation section %u has bad info %u"), |
| 291 | i, shndx); |
| 292 | continue; |
| 293 | } |
| 294 | |
| 295 | Output_section* os = out_sections[shndx]; |
| 296 | if (os == NULL) |
| 297 | continue; |
| 298 | |
| 299 | // We are scanning relocations in order to fill out the GOT and |
| 300 | // PLT sections. Relocations for sections which are not |
| 301 | // allocated (typically debugging sections) should not add new |
| 302 | // GOT and PLT entries. So we skip them unless this is a |
| 303 | // relocatable link or we need to emit relocations. FIXME: What |
| 304 | // should we do if a linker script maps a section with SHF_ALLOC |
| 305 | // clear to a section with SHF_ALLOC set? |
| 306 | typename This::Shdr secshdr(pshdrs + shndx * This::shdr_size); |
| 307 | bool is_section_allocated = ((secshdr.get_sh_flags() & elfcpp::SHF_ALLOC) |
| 308 | != 0); |
| 309 | if (!is_section_allocated |
| 310 | && !parameters->options().relocatable() |
| 311 | && !parameters->options().emit_relocs() |
| 312 | && !parameters->incremental()) |
| 313 | continue; |
| 314 | |
| 315 | if (this->adjust_shndx(shdr.get_sh_link()) != this->symtab_shndx_) |
| 316 | { |
| 317 | this->error(_("relocation section %u uses unexpected " |
| 318 | "symbol table %u"), |
| 319 | i, this->adjust_shndx(shdr.get_sh_link())); |
| 320 | continue; |
| 321 | } |
| 322 | |
| 323 | off_t sh_size = shdr.get_sh_size(); |
| 324 | |
| 325 | if (sh_size == 0) |
| 326 | continue; |
| 327 | |
| 328 | unsigned int reloc_size; |
| 329 | if (sh_type == elfcpp::SHT_REL) |
| 330 | reloc_size = elfcpp::Elf_sizes<size>::rel_size; |
| 331 | else |
| 332 | reloc_size = elfcpp::Elf_sizes<size>::rela_size; |
| 333 | if (reloc_size != shdr.get_sh_entsize()) |
| 334 | { |
| 335 | this->error(_("unexpected entsize for reloc section %u: %lu != %u"), |
| 336 | i, static_cast<unsigned long>(shdr.get_sh_entsize()), |
| 337 | reloc_size); |
| 338 | continue; |
| 339 | } |
| 340 | |
| 341 | size_t reloc_count = sh_size / reloc_size; |
| 342 | if (static_cast<off_t>(reloc_count * reloc_size) != sh_size) |
| 343 | { |
| 344 | this->error(_("reloc section %u size %lu uneven"), |
| 345 | i, static_cast<unsigned long>(sh_size)); |
| 346 | continue; |
| 347 | } |
| 348 | |
| 349 | rd->relocs.push_back(Section_relocs()); |
| 350 | Section_relocs& sr(rd->relocs.back()); |
| 351 | sr.reloc_shndx = i; |
| 352 | sr.data_shndx = shndx; |
| 353 | sr.contents = this->get_lasting_view(shdr.get_sh_offset(), sh_size, |
| 354 | true, true); |
| 355 | sr.sh_type = sh_type; |
| 356 | sr.reloc_count = reloc_count; |
| 357 | sr.output_section = os; |
| 358 | sr.needs_special_offset_handling = out_offsets[shndx] == invalid_address; |
| 359 | sr.is_data_section_allocated = is_section_allocated; |
| 360 | } |
| 361 | |
| 362 | // Read the local symbols. |
| 363 | gold_assert(this->symtab_shndx_ != -1U); |
| 364 | if (this->symtab_shndx_ == 0 || this->local_symbol_count_ == 0) |
| 365 | rd->local_symbols = NULL; |
| 366 | else |
| 367 | { |
| 368 | typename This::Shdr symtabshdr(pshdrs |
| 369 | + this->symtab_shndx_ * This::shdr_size); |
| 370 | gold_assert(symtabshdr.get_sh_type() == elfcpp::SHT_SYMTAB); |
| 371 | const int sym_size = This::sym_size; |
| 372 | const unsigned int loccount = this->local_symbol_count_; |
| 373 | gold_assert(loccount == symtabshdr.get_sh_info()); |
| 374 | off_t locsize = loccount * sym_size; |
| 375 | rd->local_symbols = this->get_lasting_view(symtabshdr.get_sh_offset(), |
| 376 | locsize, true, true); |
| 377 | } |
| 378 | } |
| 379 | |
| 380 | // Process the relocs to generate mappings from source sections to referenced |
| 381 | // sections. This is used during garbage collection to determine garbage |
| 382 | // sections. |
| 383 | |
| 384 | template<int size, bool big_endian> |
| 385 | void |
| 386 | Sized_relobj_file<size, big_endian>::do_gc_process_relocs(Symbol_table* symtab, |
| 387 | Layout* layout, |
| 388 | Read_relocs_data* rd) |
| 389 | { |
| 390 | Sized_target<size, big_endian>* target = |
| 391 | parameters->sized_target<size, big_endian>(); |
| 392 | |
| 393 | const unsigned char* local_symbols; |
| 394 | if (rd->local_symbols == NULL) |
| 395 | local_symbols = NULL; |
| 396 | else |
| 397 | local_symbols = rd->local_symbols->data(); |
| 398 | |
| 399 | for (Read_relocs_data::Relocs_list::iterator p = rd->relocs.begin(); |
| 400 | p != rd->relocs.end(); |
| 401 | ++p) |
| 402 | { |
| 403 | if (!parameters->options().relocatable()) |
| 404 | { |
| 405 | // As noted above, when not generating an object file, we |
| 406 | // only scan allocated sections. We may see a non-allocated |
| 407 | // section here if we are emitting relocs. |
| 408 | if (p->is_data_section_allocated) |
| 409 | target->gc_process_relocs(symtab, layout, this, |
| 410 | p->data_shndx, p->sh_type, |
| 411 | p->contents->data(), p->reloc_count, |
| 412 | p->output_section, |
| 413 | p->needs_special_offset_handling, |
| 414 | this->local_symbol_count_, |
| 415 | local_symbols); |
| 416 | } |
| 417 | } |
| 418 | } |
| 419 | |
| 420 | |
| 421 | // Scan the relocs and adjust the symbol table. This looks for |
| 422 | // relocations which require GOT/PLT/COPY relocations. |
| 423 | |
| 424 | template<int size, bool big_endian> |
| 425 | void |
| 426 | Sized_relobj_file<size, big_endian>::do_scan_relocs(Symbol_table* symtab, |
| 427 | Layout* layout, |
| 428 | Read_relocs_data* rd) |
| 429 | { |
| 430 | Sized_target<size, big_endian>* target = |
| 431 | parameters->sized_target<size, big_endian>(); |
| 432 | |
| 433 | const unsigned char* local_symbols; |
| 434 | if (rd->local_symbols == NULL) |
| 435 | local_symbols = NULL; |
| 436 | else |
| 437 | local_symbols = rd->local_symbols->data(); |
| 438 | |
| 439 | // For incremental links, allocate the counters for incremental relocations. |
| 440 | if (layout->incremental_inputs() != NULL) |
| 441 | this->allocate_incremental_reloc_counts(); |
| 442 | |
| 443 | for (Read_relocs_data::Relocs_list::iterator p = rd->relocs.begin(); |
| 444 | p != rd->relocs.end(); |
| 445 | ++p) |
| 446 | { |
| 447 | // When garbage collection is on, unreferenced sections are not included |
| 448 | // in the link that would have been included normally. This is known only |
| 449 | // after Read_relocs hence this check has to be done again. |
| 450 | if (parameters->options().gc_sections() |
| 451 | || parameters->options().icf_enabled()) |
| 452 | { |
| 453 | if (p->output_section == NULL) |
| 454 | continue; |
| 455 | } |
| 456 | if (!parameters->options().relocatable()) |
| 457 | { |
| 458 | // As noted above, when not generating an object file, we |
| 459 | // only scan allocated sections. We may see a non-allocated |
| 460 | // section here if we are emitting relocs. |
| 461 | if (p->is_data_section_allocated) |
| 462 | target->scan_relocs(symtab, layout, this, p->data_shndx, |
| 463 | p->sh_type, p->contents->data(), |
| 464 | p->reloc_count, p->output_section, |
| 465 | p->needs_special_offset_handling, |
| 466 | this->local_symbol_count_, |
| 467 | local_symbols); |
| 468 | if (parameters->options().emit_relocs()) |
| 469 | this->emit_relocs_scan(symtab, layout, local_symbols, p); |
| 470 | if (layout->incremental_inputs() != NULL) |
| 471 | this->incremental_relocs_scan(p); |
| 472 | } |
| 473 | else |
| 474 | { |
| 475 | Relocatable_relocs* rr = this->relocatable_relocs(p->reloc_shndx); |
| 476 | gold_assert(rr != NULL); |
| 477 | rr->set_reloc_count(p->reloc_count); |
| 478 | target->scan_relocatable_relocs(symtab, layout, this, |
| 479 | p->data_shndx, p->sh_type, |
| 480 | p->contents->data(), |
| 481 | p->reloc_count, |
| 482 | p->output_section, |
| 483 | p->needs_special_offset_handling, |
| 484 | this->local_symbol_count_, |
| 485 | local_symbols, |
| 486 | rr); |
| 487 | } |
| 488 | |
| 489 | delete p->contents; |
| 490 | p->contents = NULL; |
| 491 | } |
| 492 | |
| 493 | // For incremental links, finalize the allocation of relocations. |
| 494 | if (layout->incremental_inputs() != NULL) |
| 495 | this->finalize_incremental_relocs(layout, true); |
| 496 | |
| 497 | if (rd->local_symbols != NULL) |
| 498 | { |
| 499 | delete rd->local_symbols; |
| 500 | rd->local_symbols = NULL; |
| 501 | } |
| 502 | } |
| 503 | |
| 504 | // This is a strategy class we use when scanning for --emit-relocs. |
| 505 | |
| 506 | template<int sh_type> |
| 507 | class Emit_relocs_strategy |
| 508 | { |
| 509 | public: |
| 510 | // A local non-section symbol. |
| 511 | inline Relocatable_relocs::Reloc_strategy |
| 512 | local_non_section_strategy(unsigned int, Relobj*, unsigned int) |
| 513 | { return Relocatable_relocs::RELOC_COPY; } |
| 514 | |
| 515 | // A local section symbol. |
| 516 | inline Relocatable_relocs::Reloc_strategy |
| 517 | local_section_strategy(unsigned int, Relobj*) |
| 518 | { |
| 519 | if (sh_type == elfcpp::SHT_RELA) |
| 520 | return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA; |
| 521 | else |
| 522 | { |
| 523 | // The addend is stored in the section contents. Since this |
| 524 | // is not a relocatable link, we are going to apply the |
| 525 | // relocation contents to the section as usual. This means |
| 526 | // that we have no way to record the original addend. If the |
| 527 | // original addend is not zero, there is basically no way for |
| 528 | // the user to handle this correctly. Caveat emptor. |
| 529 | return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_0; |
| 530 | } |
| 531 | } |
| 532 | |
| 533 | // A global symbol. |
| 534 | inline Relocatable_relocs::Reloc_strategy |
| 535 | global_strategy(unsigned int, Relobj*, unsigned int) |
| 536 | { return Relocatable_relocs::RELOC_COPY; } |
| 537 | }; |
| 538 | |
| 539 | // Scan the input relocations for --emit-relocs. |
| 540 | |
| 541 | template<int size, bool big_endian> |
| 542 | void |
| 543 | Sized_relobj_file<size, big_endian>::emit_relocs_scan( |
| 544 | Symbol_table* symtab, |
| 545 | Layout* layout, |
| 546 | const unsigned char* plocal_syms, |
| 547 | const Read_relocs_data::Relocs_list::iterator& p) |
| 548 | { |
| 549 | Relocatable_relocs* rr = this->relocatable_relocs(p->reloc_shndx); |
| 550 | gold_assert(rr != NULL); |
| 551 | rr->set_reloc_count(p->reloc_count); |
| 552 | |
| 553 | if (p->sh_type == elfcpp::SHT_REL) |
| 554 | this->emit_relocs_scan_reltype<elfcpp::SHT_REL>(symtab, layout, |
| 555 | plocal_syms, p, rr); |
| 556 | else |
| 557 | { |
| 558 | gold_assert(p->sh_type == elfcpp::SHT_RELA); |
| 559 | this->emit_relocs_scan_reltype<elfcpp::SHT_RELA>(symtab, layout, |
| 560 | plocal_syms, p, rr); |
| 561 | } |
| 562 | } |
| 563 | |
| 564 | // Scan the input relocation for --emit-relocs, templatized on the |
| 565 | // type of the relocation section. |
| 566 | |
| 567 | template<int size, bool big_endian> |
| 568 | template<int sh_type> |
| 569 | void |
| 570 | Sized_relobj_file<size, big_endian>::emit_relocs_scan_reltype( |
| 571 | Symbol_table* symtab, |
| 572 | Layout* layout, |
| 573 | const unsigned char* plocal_syms, |
| 574 | const Read_relocs_data::Relocs_list::iterator& p, |
| 575 | Relocatable_relocs* rr) |
| 576 | { |
| 577 | scan_relocatable_relocs<size, big_endian, sh_type, |
| 578 | Emit_relocs_strategy<sh_type> >( |
| 579 | symtab, |
| 580 | layout, |
| 581 | this, |
| 582 | p->data_shndx, |
| 583 | p->contents->data(), |
| 584 | p->reloc_count, |
| 585 | p->output_section, |
| 586 | p->needs_special_offset_handling, |
| 587 | this->local_symbol_count_, |
| 588 | plocal_syms, |
| 589 | rr); |
| 590 | } |
| 591 | |
| 592 | // Scan the input relocations for --incremental. |
| 593 | |
| 594 | template<int size, bool big_endian> |
| 595 | void |
| 596 | Sized_relobj_file<size, big_endian>::incremental_relocs_scan( |
| 597 | const Read_relocs_data::Relocs_list::iterator& p) |
| 598 | { |
| 599 | if (p->sh_type == elfcpp::SHT_REL) |
| 600 | this->incremental_relocs_scan_reltype<elfcpp::SHT_REL>(p); |
| 601 | else |
| 602 | { |
| 603 | gold_assert(p->sh_type == elfcpp::SHT_RELA); |
| 604 | this->incremental_relocs_scan_reltype<elfcpp::SHT_RELA>(p); |
| 605 | } |
| 606 | } |
| 607 | |
| 608 | // Scan the input relocation for --incremental, templatized on the |
| 609 | // type of the relocation section. |
| 610 | |
| 611 | template<int size, bool big_endian> |
| 612 | template<int sh_type> |
| 613 | void |
| 614 | Sized_relobj_file<size, big_endian>::incremental_relocs_scan_reltype( |
| 615 | const Read_relocs_data::Relocs_list::iterator& p) |
| 616 | { |
| 617 | typedef typename Reloc_types<sh_type, size, big_endian>::Reloc Reltype; |
| 618 | const int reloc_size = Reloc_types<sh_type, size, big_endian>::reloc_size; |
| 619 | const unsigned char* prelocs = p->contents->data(); |
| 620 | size_t reloc_count = p->reloc_count; |
| 621 | |
| 622 | for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size) |
| 623 | { |
| 624 | Reltype reloc(prelocs); |
| 625 | |
| 626 | if (p->needs_special_offset_handling |
| 627 | && !p->output_section->is_input_address_mapped(this, p->data_shndx, |
| 628 | reloc.get_r_offset())) |
| 629 | continue; |
| 630 | |
| 631 | typename elfcpp::Elf_types<size>::Elf_WXword r_info = |
| 632 | reloc.get_r_info(); |
| 633 | const unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); |
| 634 | |
| 635 | if (r_sym >= this->local_symbol_count_) |
| 636 | this->count_incremental_reloc(r_sym - this->local_symbol_count_); |
| 637 | } |
| 638 | } |
| 639 | |
| 640 | // Relocate the input sections and write out the local symbols. |
| 641 | |
| 642 | template<int size, bool big_endian> |
| 643 | void |
| 644 | Sized_relobj_file<size, big_endian>::do_relocate(const Symbol_table* symtab, |
| 645 | const Layout* layout, |
| 646 | Output_file* of) |
| 647 | { |
| 648 | unsigned int shnum = this->shnum(); |
| 649 | |
| 650 | // Read the section headers. |
| 651 | const unsigned char* pshdrs = this->get_view(this->elf_file_.shoff(), |
| 652 | shnum * This::shdr_size, |
| 653 | true, true); |
| 654 | |
| 655 | Views views; |
| 656 | views.resize(shnum); |
| 657 | |
| 658 | // Make two passes over the sections. The first one copies the |
| 659 | // section data to the output file. The second one applies |
| 660 | // relocations. |
| 661 | |
| 662 | this->write_sections(layout, pshdrs, of, &views); |
| 663 | |
| 664 | // To speed up relocations, we set up hash tables for fast lookup of |
| 665 | // input offsets to output addresses. |
| 666 | this->initialize_input_to_output_maps(); |
| 667 | |
| 668 | // Apply relocations. |
| 669 | |
| 670 | this->relocate_sections(symtab, layout, pshdrs, of, &views); |
| 671 | |
| 672 | // After we've done the relocations, we release the hash tables, |
| 673 | // since we no longer need them. |
| 674 | this->free_input_to_output_maps(); |
| 675 | |
| 676 | // Write out the accumulated views. |
| 677 | for (unsigned int i = 1; i < shnum; ++i) |
| 678 | { |
| 679 | if (views[i].view != NULL) |
| 680 | { |
| 681 | if (views[i].is_ctors_reverse_view) |
| 682 | this->reverse_words(views[i].view, views[i].view_size); |
| 683 | if (!views[i].is_postprocessing_view) |
| 684 | { |
| 685 | if (views[i].is_input_output_view) |
| 686 | of->write_input_output_view(views[i].offset, |
| 687 | views[i].view_size, |
| 688 | views[i].view); |
| 689 | else |
| 690 | of->write_output_view(views[i].offset, views[i].view_size, |
| 691 | views[i].view); |
| 692 | } |
| 693 | } |
| 694 | } |
| 695 | |
| 696 | // Write out the local symbols. |
| 697 | this->write_local_symbols(of, layout->sympool(), layout->dynpool(), |
| 698 | layout->symtab_xindex(), layout->dynsym_xindex(), |
| 699 | layout->symtab_section_offset()); |
| 700 | } |
| 701 | |
| 702 | // Sort a Read_multiple vector by file offset. |
| 703 | struct Read_multiple_compare |
| 704 | { |
| 705 | inline bool |
| 706 | operator()(const File_read::Read_multiple_entry& rme1, |
| 707 | const File_read::Read_multiple_entry& rme2) const |
| 708 | { return rme1.file_offset < rme2.file_offset; } |
| 709 | }; |
| 710 | |
| 711 | // Write section data to the output file. PSHDRS points to the |
| 712 | // section headers. Record the views in *PVIEWS for use when |
| 713 | // relocating. |
| 714 | |
| 715 | template<int size, bool big_endian> |
| 716 | void |
| 717 | Sized_relobj_file<size, big_endian>::write_sections(const Layout* layout, |
| 718 | const unsigned char* pshdrs, |
| 719 | Output_file* of, |
| 720 | Views* pviews) |
| 721 | { |
| 722 | unsigned int shnum = this->shnum(); |
| 723 | const Output_sections& out_sections(this->output_sections()); |
| 724 | const std::vector<Address>& out_offsets(this->section_offsets()); |
| 725 | |
| 726 | File_read::Read_multiple rm; |
| 727 | bool is_sorted = true; |
| 728 | |
| 729 | const unsigned char* p = pshdrs + This::shdr_size; |
| 730 | for (unsigned int i = 1; i < shnum; ++i, p += This::shdr_size) |
| 731 | { |
| 732 | View_size* pvs = &(*pviews)[i]; |
| 733 | |
| 734 | pvs->view = NULL; |
| 735 | |
| 736 | const Output_section* os = out_sections[i]; |
| 737 | if (os == NULL) |
| 738 | continue; |
| 739 | Address output_offset = out_offsets[i]; |
| 740 | |
| 741 | typename This::Shdr shdr(p); |
| 742 | |
| 743 | if (shdr.get_sh_type() == elfcpp::SHT_NOBITS) |
| 744 | continue; |
| 745 | |
| 746 | if ((parameters->options().relocatable() |
| 747 | || parameters->options().emit_relocs()) |
| 748 | && (shdr.get_sh_type() == elfcpp::SHT_REL |
| 749 | || shdr.get_sh_type() == elfcpp::SHT_RELA) |
| 750 | && (shdr.get_sh_flags() & elfcpp::SHF_ALLOC) == 0) |
| 751 | { |
| 752 | // This is a reloc section in a relocatable link or when |
| 753 | // emitting relocs. We don't need to read the input file. |
| 754 | // The size and file offset are stored in the |
| 755 | // Relocatable_relocs structure. |
| 756 | Relocatable_relocs* rr = this->relocatable_relocs(i); |
| 757 | gold_assert(rr != NULL); |
| 758 | Output_data* posd = rr->output_data(); |
| 759 | gold_assert(posd != NULL); |
| 760 | |
| 761 | pvs->offset = posd->offset(); |
| 762 | pvs->view_size = posd->data_size(); |
| 763 | pvs->view = of->get_output_view(pvs->offset, pvs->view_size); |
| 764 | pvs->address = posd->address(); |
| 765 | pvs->is_input_output_view = false; |
| 766 | pvs->is_postprocessing_view = false; |
| 767 | pvs->is_ctors_reverse_view = false; |
| 768 | |
| 769 | continue; |
| 770 | } |
| 771 | |
| 772 | // In the normal case, this input section is simply mapped to |
| 773 | // the output section at offset OUTPUT_OFFSET. |
| 774 | |
| 775 | // However, if OUTPUT_OFFSET == INVALID_ADDRESS, then input data is |
| 776 | // handled specially--e.g., a .eh_frame section. The relocation |
| 777 | // routines need to check for each reloc where it should be |
| 778 | // applied. For this case, we need an input/output view for the |
| 779 | // entire contents of the section in the output file. We don't |
| 780 | // want to copy the contents of the input section to the output |
| 781 | // section; the output section contents were already written, |
| 782 | // and we waited for them in Relocate_task::is_runnable because |
| 783 | // relocs_must_follow_section_writes is set for the object. |
| 784 | |
| 785 | // Regardless of which of the above cases is true, we have to |
| 786 | // check requires_postprocessing of the output section. If that |
| 787 | // is false, then we work with views of the output file |
| 788 | // directly. If it is true, then we work with a separate |
| 789 | // buffer, and the output section is responsible for writing the |
| 790 | // final data to the output file. |
| 791 | |
| 792 | off_t output_section_offset; |
| 793 | Address output_section_size; |
| 794 | if (!os->requires_postprocessing()) |
| 795 | { |
| 796 | output_section_offset = os->offset(); |
| 797 | output_section_size = convert_types<Address, off_t>(os->data_size()); |
| 798 | } |
| 799 | else |
| 800 | { |
| 801 | output_section_offset = 0; |
| 802 | output_section_size = |
| 803 | convert_types<Address, off_t>(os->postprocessing_buffer_size()); |
| 804 | } |
| 805 | |
| 806 | off_t view_start; |
| 807 | section_size_type view_size; |
| 808 | bool must_decompress = false; |
| 809 | if (output_offset != invalid_address) |
| 810 | { |
| 811 | view_start = output_section_offset + output_offset; |
| 812 | view_size = convert_to_section_size_type(shdr.get_sh_size()); |
| 813 | section_size_type uncompressed_size; |
| 814 | if (this->section_is_compressed(i, &uncompressed_size)) |
| 815 | { |
| 816 | view_size = uncompressed_size; |
| 817 | must_decompress = true; |
| 818 | } |
| 819 | } |
| 820 | else |
| 821 | { |
| 822 | view_start = output_section_offset; |
| 823 | view_size = convert_to_section_size_type(output_section_size); |
| 824 | } |
| 825 | |
| 826 | if (view_size == 0) |
| 827 | continue; |
| 828 | |
| 829 | gold_assert(output_offset == invalid_address |
| 830 | || output_offset + view_size <= output_section_size); |
| 831 | |
| 832 | unsigned char* view; |
| 833 | if (os->requires_postprocessing()) |
| 834 | { |
| 835 | unsigned char* buffer = os->postprocessing_buffer(); |
| 836 | view = buffer + view_start; |
| 837 | if (output_offset != invalid_address && !must_decompress) |
| 838 | { |
| 839 | off_t sh_offset = shdr.get_sh_offset(); |
| 840 | if (!rm.empty() && rm.back().file_offset > sh_offset) |
| 841 | is_sorted = false; |
| 842 | rm.push_back(File_read::Read_multiple_entry(sh_offset, |
| 843 | view_size, view)); |
| 844 | } |
| 845 | } |
| 846 | else |
| 847 | { |
| 848 | if (output_offset == invalid_address) |
| 849 | view = of->get_input_output_view(view_start, view_size); |
| 850 | else |
| 851 | { |
| 852 | view = of->get_output_view(view_start, view_size); |
| 853 | if (!must_decompress) |
| 854 | { |
| 855 | off_t sh_offset = shdr.get_sh_offset(); |
| 856 | if (!rm.empty() && rm.back().file_offset > sh_offset) |
| 857 | is_sorted = false; |
| 858 | rm.push_back(File_read::Read_multiple_entry(sh_offset, |
| 859 | view_size, view)); |
| 860 | } |
| 861 | } |
| 862 | } |
| 863 | |
| 864 | if (must_decompress) |
| 865 | { |
| 866 | // Read and decompress the section. |
| 867 | section_size_type len; |
| 868 | const unsigned char* p = this->section_contents(i, &len, false); |
| 869 | if (!decompress_input_section(p, len, view, view_size)) |
| 870 | this->error(_("could not decompress section %s"), |
| 871 | this->section_name(i).c_str()); |
| 872 | } |
| 873 | |
| 874 | pvs->view = view; |
| 875 | pvs->address = os->address(); |
| 876 | if (output_offset != invalid_address) |
| 877 | pvs->address += output_offset; |
| 878 | pvs->offset = view_start; |
| 879 | pvs->view_size = view_size; |
| 880 | pvs->is_input_output_view = output_offset == invalid_address; |
| 881 | pvs->is_postprocessing_view = os->requires_postprocessing(); |
| 882 | pvs->is_ctors_reverse_view = |
| 883 | (!parameters->options().relocatable() |
| 884 | && view_size > size / 8 |
| 885 | && (strcmp(os->name(), ".init_array") == 0 |
| 886 | || strcmp(os->name(), ".fini_array") == 0) |
| 887 | && layout->is_ctors_in_init_array(this, i)); |
| 888 | } |
| 889 | |
| 890 | // Actually read the data. |
| 891 | if (!rm.empty()) |
| 892 | { |
| 893 | if (!is_sorted) |
| 894 | std::sort(rm.begin(), rm.end(), Read_multiple_compare()); |
| 895 | this->read_multiple(rm); |
| 896 | } |
| 897 | } |
| 898 | |
| 899 | // Relocate section data. VIEWS points to the section data as views |
| 900 | // in the output file. |
| 901 | |
| 902 | template<int size, bool big_endian> |
| 903 | void |
| 904 | Sized_relobj_file<size, big_endian>::do_relocate_sections( |
| 905 | const Symbol_table* symtab, |
| 906 | const Layout* layout, |
| 907 | const unsigned char* pshdrs, |
| 908 | Output_file* of, |
| 909 | Views* pviews) |
| 910 | { |
| 911 | unsigned int shnum = this->shnum(); |
| 912 | Sized_target<size, big_endian>* target = |
| 913 | parameters->sized_target<size, big_endian>(); |
| 914 | |
| 915 | const Output_sections& out_sections(this->output_sections()); |
| 916 | const std::vector<Address>& out_offsets(this->section_offsets()); |
| 917 | |
| 918 | Relocate_info<size, big_endian> relinfo; |
| 919 | relinfo.symtab = symtab; |
| 920 | relinfo.layout = layout; |
| 921 | relinfo.object = this; |
| 922 | |
| 923 | const unsigned char* p = pshdrs + This::shdr_size; |
| 924 | for (unsigned int i = 1; i < shnum; ++i, p += This::shdr_size) |
| 925 | { |
| 926 | typename This::Shdr shdr(p); |
| 927 | |
| 928 | unsigned int sh_type = shdr.get_sh_type(); |
| 929 | if (sh_type != elfcpp::SHT_REL && sh_type != elfcpp::SHT_RELA) |
| 930 | continue; |
| 931 | |
| 932 | off_t sh_size = shdr.get_sh_size(); |
| 933 | if (sh_size == 0) |
| 934 | continue; |
| 935 | |
| 936 | unsigned int index = this->adjust_shndx(shdr.get_sh_info()); |
| 937 | if (index >= this->shnum()) |
| 938 | { |
| 939 | this->error(_("relocation section %u has bad info %u"), |
| 940 | i, index); |
| 941 | continue; |
| 942 | } |
| 943 | |
| 944 | Output_section* os = out_sections[index]; |
| 945 | if (os == NULL) |
| 946 | { |
| 947 | // This relocation section is against a section which we |
| 948 | // discarded. |
| 949 | continue; |
| 950 | } |
| 951 | Address output_offset = out_offsets[index]; |
| 952 | |
| 953 | gold_assert((*pviews)[index].view != NULL); |
| 954 | if (parameters->options().relocatable()) |
| 955 | gold_assert((*pviews)[i].view != NULL); |
| 956 | |
| 957 | if (this->adjust_shndx(shdr.get_sh_link()) != this->symtab_shndx_) |
| 958 | { |
| 959 | gold_error(_("relocation section %u uses unexpected " |
| 960 | "symbol table %u"), |
| 961 | i, this->adjust_shndx(shdr.get_sh_link())); |
| 962 | continue; |
| 963 | } |
| 964 | |
| 965 | const unsigned char* prelocs = this->get_view(shdr.get_sh_offset(), |
| 966 | sh_size, true, false); |
| 967 | |
| 968 | unsigned int reloc_size; |
| 969 | if (sh_type == elfcpp::SHT_REL) |
| 970 | reloc_size = elfcpp::Elf_sizes<size>::rel_size; |
| 971 | else |
| 972 | reloc_size = elfcpp::Elf_sizes<size>::rela_size; |
| 973 | |
| 974 | if (reloc_size != shdr.get_sh_entsize()) |
| 975 | { |
| 976 | gold_error(_("unexpected entsize for reloc section %u: %lu != %u"), |
| 977 | i, static_cast<unsigned long>(shdr.get_sh_entsize()), |
| 978 | reloc_size); |
| 979 | continue; |
| 980 | } |
| 981 | |
| 982 | size_t reloc_count = sh_size / reloc_size; |
| 983 | if (static_cast<off_t>(reloc_count * reloc_size) != sh_size) |
| 984 | { |
| 985 | gold_error(_("reloc section %u size %lu uneven"), |
| 986 | i, static_cast<unsigned long>(sh_size)); |
| 987 | continue; |
| 988 | } |
| 989 | |
| 990 | gold_assert(output_offset != invalid_address |
| 991 | || this->relocs_must_follow_section_writes()); |
| 992 | |
| 993 | relinfo.reloc_shndx = i; |
| 994 | relinfo.reloc_shdr = p; |
| 995 | relinfo.data_shndx = index; |
| 996 | relinfo.data_shdr = pshdrs + index * This::shdr_size; |
| 997 | unsigned char* view = (*pviews)[index].view; |
| 998 | Address address = (*pviews)[index].address; |
| 999 | section_size_type view_size = (*pviews)[index].view_size; |
| 1000 | |
| 1001 | Reloc_symbol_changes* reloc_map = NULL; |
| 1002 | if (this->uses_split_stack() && output_offset != invalid_address) |
| 1003 | { |
| 1004 | typename This::Shdr data_shdr(pshdrs + index * This::shdr_size); |
| 1005 | if ((data_shdr.get_sh_flags() & elfcpp::SHF_EXECINSTR) != 0) |
| 1006 | this->split_stack_adjust(symtab, pshdrs, sh_type, index, |
| 1007 | prelocs, reloc_count, view, view_size, |
| 1008 | &reloc_map); |
| 1009 | } |
| 1010 | |
| 1011 | if (!parameters->options().relocatable()) |
| 1012 | { |
| 1013 | target->relocate_section(&relinfo, sh_type, prelocs, reloc_count, os, |
| 1014 | output_offset == invalid_address, |
| 1015 | view, address, view_size, reloc_map); |
| 1016 | if (parameters->options().emit_relocs()) |
| 1017 | this->emit_relocs(&relinfo, i, sh_type, prelocs, reloc_count, |
| 1018 | os, output_offset, view, address, view_size, |
| 1019 | (*pviews)[i].view, (*pviews)[i].view_size); |
| 1020 | if (parameters->incremental()) |
| 1021 | this->incremental_relocs_write(&relinfo, sh_type, prelocs, |
| 1022 | reloc_count, os, output_offset, of); |
| 1023 | } |
| 1024 | else |
| 1025 | { |
| 1026 | Relocatable_relocs* rr = this->relocatable_relocs(i); |
| 1027 | target->relocate_for_relocatable(&relinfo, sh_type, prelocs, |
| 1028 | reloc_count, os, output_offset, rr, |
| 1029 | view, address, view_size, |
| 1030 | (*pviews)[i].view, |
| 1031 | (*pviews)[i].view_size); |
| 1032 | } |
| 1033 | } |
| 1034 | } |
| 1035 | |
| 1036 | // Emit the relocs for --emit-relocs. |
| 1037 | |
| 1038 | template<int size, bool big_endian> |
| 1039 | void |
| 1040 | Sized_relobj_file<size, big_endian>::emit_relocs( |
| 1041 | const Relocate_info<size, big_endian>* relinfo, |
| 1042 | unsigned int i, |
| 1043 | unsigned int sh_type, |
| 1044 | const unsigned char* prelocs, |
| 1045 | size_t reloc_count, |
| 1046 | Output_section* output_section, |
| 1047 | typename elfcpp::Elf_types<size>::Elf_Addr offset_in_output_section, |
| 1048 | unsigned char* view, |
| 1049 | typename elfcpp::Elf_types<size>::Elf_Addr address, |
| 1050 | section_size_type view_size, |
| 1051 | unsigned char* reloc_view, |
| 1052 | section_size_type reloc_view_size) |
| 1053 | { |
| 1054 | if (sh_type == elfcpp::SHT_REL) |
| 1055 | this->emit_relocs_reltype<elfcpp::SHT_REL>(relinfo, i, prelocs, |
| 1056 | reloc_count, output_section, |
| 1057 | offset_in_output_section, |
| 1058 | view, address, view_size, |
| 1059 | reloc_view, reloc_view_size); |
| 1060 | else |
| 1061 | { |
| 1062 | gold_assert(sh_type == elfcpp::SHT_RELA); |
| 1063 | this->emit_relocs_reltype<elfcpp::SHT_RELA>(relinfo, i, prelocs, |
| 1064 | reloc_count, output_section, |
| 1065 | offset_in_output_section, |
| 1066 | view, address, view_size, |
| 1067 | reloc_view, reloc_view_size); |
| 1068 | } |
| 1069 | } |
| 1070 | |
| 1071 | // Emit the relocs for --emit-relocs, templatized on the type of the |
| 1072 | // relocation section. |
| 1073 | |
| 1074 | template<int size, bool big_endian> |
| 1075 | template<int sh_type> |
| 1076 | void |
| 1077 | Sized_relobj_file<size, big_endian>::emit_relocs_reltype( |
| 1078 | const Relocate_info<size, big_endian>* relinfo, |
| 1079 | unsigned int i, |
| 1080 | const unsigned char* prelocs, |
| 1081 | size_t reloc_count, |
| 1082 | Output_section* output_section, |
| 1083 | typename elfcpp::Elf_types<size>::Elf_Addr offset_in_output_section, |
| 1084 | unsigned char* view, |
| 1085 | typename elfcpp::Elf_types<size>::Elf_Addr address, |
| 1086 | section_size_type view_size, |
| 1087 | unsigned char* reloc_view, |
| 1088 | section_size_type reloc_view_size) |
| 1089 | { |
| 1090 | const Relocatable_relocs* rr = this->relocatable_relocs(i); |
| 1091 | relocate_for_relocatable<size, big_endian, sh_type>( |
| 1092 | relinfo, |
| 1093 | prelocs, |
| 1094 | reloc_count, |
| 1095 | output_section, |
| 1096 | offset_in_output_section, |
| 1097 | rr, |
| 1098 | view, |
| 1099 | address, |
| 1100 | view_size, |
| 1101 | reloc_view, |
| 1102 | reloc_view_size); |
| 1103 | } |
| 1104 | |
| 1105 | // Write the incremental relocs. |
| 1106 | |
| 1107 | template<int size, bool big_endian> |
| 1108 | void |
| 1109 | Sized_relobj_file<size, big_endian>::incremental_relocs_write( |
| 1110 | const Relocate_info<size, big_endian>* relinfo, |
| 1111 | unsigned int sh_type, |
| 1112 | const unsigned char* prelocs, |
| 1113 | size_t reloc_count, |
| 1114 | Output_section* output_section, |
| 1115 | Address output_offset, |
| 1116 | Output_file* of) |
| 1117 | { |
| 1118 | if (sh_type == elfcpp::SHT_REL) |
| 1119 | this->incremental_relocs_write_reltype<elfcpp::SHT_REL>( |
| 1120 | relinfo, |
| 1121 | prelocs, |
| 1122 | reloc_count, |
| 1123 | output_section, |
| 1124 | output_offset, |
| 1125 | of); |
| 1126 | else |
| 1127 | { |
| 1128 | gold_assert(sh_type == elfcpp::SHT_RELA); |
| 1129 | this->incremental_relocs_write_reltype<elfcpp::SHT_RELA>( |
| 1130 | relinfo, |
| 1131 | prelocs, |
| 1132 | reloc_count, |
| 1133 | output_section, |
| 1134 | output_offset, |
| 1135 | of); |
| 1136 | } |
| 1137 | } |
| 1138 | |
| 1139 | // Write the incremental relocs, templatized on the type of the |
| 1140 | // relocation section. |
| 1141 | |
| 1142 | template<int size, bool big_endian> |
| 1143 | template<int sh_type> |
| 1144 | void |
| 1145 | Sized_relobj_file<size, big_endian>::incremental_relocs_write_reltype( |
| 1146 | const Relocate_info<size, big_endian>* relinfo, |
| 1147 | const unsigned char* prelocs, |
| 1148 | size_t reloc_count, |
| 1149 | Output_section* output_section, |
| 1150 | Address output_offset, |
| 1151 | Output_file* of) |
| 1152 | { |
| 1153 | typedef typename Reloc_types<sh_type, size, big_endian>::Reloc Reloc; |
| 1154 | const unsigned int reloc_size = |
| 1155 | Reloc_types<sh_type, size, big_endian>::reloc_size; |
| 1156 | const unsigned int sizeof_addr = size / 8; |
| 1157 | const unsigned int incr_reloc_size = |
| 1158 | Incremental_relocs_reader<size, big_endian>::reloc_size; |
| 1159 | |
| 1160 | unsigned int out_shndx = output_section->out_shndx(); |
| 1161 | |
| 1162 | // Get a view for the .gnu_incremental_relocs section. |
| 1163 | |
| 1164 | Incremental_inputs* inputs = relinfo->layout->incremental_inputs(); |
| 1165 | gold_assert(inputs != NULL); |
| 1166 | const off_t relocs_off = inputs->relocs_section()->offset(); |
| 1167 | const off_t relocs_size = inputs->relocs_section()->data_size(); |
| 1168 | unsigned char* const view = of->get_output_view(relocs_off, relocs_size); |
| 1169 | |
| 1170 | for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size) |
| 1171 | { |
| 1172 | Reloc reloc(prelocs); |
| 1173 | |
| 1174 | typename elfcpp::Elf_types<size>::Elf_WXword r_info = reloc.get_r_info(); |
| 1175 | const unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); |
| 1176 | const unsigned int r_type = elfcpp::elf_r_type<size>(r_info); |
| 1177 | |
| 1178 | if (r_sym < this->local_symbol_count_) |
| 1179 | continue; |
| 1180 | |
| 1181 | // Get the new offset--the location in the output section where |
| 1182 | // this relocation should be applied. |
| 1183 | |
| 1184 | Address offset = reloc.get_r_offset(); |
| 1185 | if (output_offset != invalid_address) |
| 1186 | offset += output_offset; |
| 1187 | else |
| 1188 | { |
| 1189 | section_offset_type sot_offset = |
| 1190 | convert_types<section_offset_type, Address>(offset); |
| 1191 | section_offset_type new_sot_offset = |
| 1192 | output_section->output_offset(relinfo->object, |
| 1193 | relinfo->data_shndx, |
| 1194 | sot_offset); |
| 1195 | gold_assert(new_sot_offset != -1); |
| 1196 | offset += new_sot_offset; |
| 1197 | } |
| 1198 | |
| 1199 | // Get the addend. |
| 1200 | typename elfcpp::Elf_types<size>::Elf_Swxword addend; |
| 1201 | if (sh_type == elfcpp::SHT_RELA) |
| 1202 | addend = |
| 1203 | Reloc_types<sh_type, size, big_endian>::get_reloc_addend(&reloc); |
| 1204 | else |
| 1205 | { |
| 1206 | // FIXME: Get the addend for SHT_REL. |
| 1207 | addend = 0; |
| 1208 | } |
| 1209 | |
| 1210 | // Get the index of the output relocation. |
| 1211 | |
| 1212 | unsigned int reloc_index = |
| 1213 | this->next_incremental_reloc_index(r_sym - this->local_symbol_count_); |
| 1214 | |
| 1215 | // Write the relocation. |
| 1216 | |
| 1217 | unsigned char* pov = view + reloc_index * incr_reloc_size; |
| 1218 | elfcpp::Swap<32, big_endian>::writeval(pov, r_type); |
| 1219 | elfcpp::Swap<32, big_endian>::writeval(pov + 4, out_shndx); |
| 1220 | elfcpp::Swap<size, big_endian>::writeval(pov + 8, offset); |
| 1221 | elfcpp::Swap<size, big_endian>::writeval(pov + 8 + sizeof_addr, addend); |
| 1222 | of->write_output_view(pov - view, incr_reloc_size, view); |
| 1223 | } |
| 1224 | } |
| 1225 | |
| 1226 | // Create merge hash tables for the local symbols. These are used to |
| 1227 | // speed up relocations. |
| 1228 | |
| 1229 | template<int size, bool big_endian> |
| 1230 | void |
| 1231 | Sized_relobj_file<size, big_endian>::initialize_input_to_output_maps() |
| 1232 | { |
| 1233 | const unsigned int loccount = this->local_symbol_count_; |
| 1234 | for (unsigned int i = 1; i < loccount; ++i) |
| 1235 | { |
| 1236 | Symbol_value<size>& lv(this->local_values_[i]); |
| 1237 | lv.initialize_input_to_output_map(this); |
| 1238 | } |
| 1239 | } |
| 1240 | |
| 1241 | // Free merge hash tables for the local symbols. |
| 1242 | |
| 1243 | template<int size, bool big_endian> |
| 1244 | void |
| 1245 | Sized_relobj_file<size, big_endian>::free_input_to_output_maps() |
| 1246 | { |
| 1247 | const unsigned int loccount = this->local_symbol_count_; |
| 1248 | for (unsigned int i = 1; i < loccount; ++i) |
| 1249 | { |
| 1250 | Symbol_value<size>& lv(this->local_values_[i]); |
| 1251 | lv.free_input_to_output_map(); |
| 1252 | } |
| 1253 | } |
| 1254 | |
| 1255 | // If an object was compiled with -fsplit-stack, this is called to |
| 1256 | // check whether any relocations refer to functions defined in objects |
| 1257 | // which were not compiled with -fsplit-stack. If they were, then we |
| 1258 | // need to apply some target-specific adjustments to request |
| 1259 | // additional stack space. |
| 1260 | |
| 1261 | template<int size, bool big_endian> |
| 1262 | void |
| 1263 | Sized_relobj_file<size, big_endian>::split_stack_adjust( |
| 1264 | const Symbol_table* symtab, |
| 1265 | const unsigned char* pshdrs, |
| 1266 | unsigned int sh_type, |
| 1267 | unsigned int shndx, |
| 1268 | const unsigned char* prelocs, |
| 1269 | size_t reloc_count, |
| 1270 | unsigned char* view, |
| 1271 | section_size_type view_size, |
| 1272 | Reloc_symbol_changes** reloc_map) |
| 1273 | { |
| 1274 | if (sh_type == elfcpp::SHT_REL) |
| 1275 | this->split_stack_adjust_reltype<elfcpp::SHT_REL>(symtab, pshdrs, shndx, |
| 1276 | prelocs, reloc_count, |
| 1277 | view, view_size, |
| 1278 | reloc_map); |
| 1279 | else |
| 1280 | { |
| 1281 | gold_assert(sh_type == elfcpp::SHT_RELA); |
| 1282 | this->split_stack_adjust_reltype<elfcpp::SHT_RELA>(symtab, pshdrs, shndx, |
| 1283 | prelocs, reloc_count, |
| 1284 | view, view_size, |
| 1285 | reloc_map); |
| 1286 | } |
| 1287 | } |
| 1288 | |
| 1289 | // Adjust for -fsplit-stack, templatized on the type of the relocation |
| 1290 | // section. |
| 1291 | |
| 1292 | template<int size, bool big_endian> |
| 1293 | template<int sh_type> |
| 1294 | void |
| 1295 | Sized_relobj_file<size, big_endian>::split_stack_adjust_reltype( |
| 1296 | const Symbol_table* symtab, |
| 1297 | const unsigned char* pshdrs, |
| 1298 | unsigned int shndx, |
| 1299 | const unsigned char* prelocs, |
| 1300 | size_t reloc_count, |
| 1301 | unsigned char* view, |
| 1302 | section_size_type view_size, |
| 1303 | Reloc_symbol_changes** reloc_map) |
| 1304 | { |
| 1305 | typedef typename Reloc_types<sh_type, size, big_endian>::Reloc Reltype; |
| 1306 | const int reloc_size = Reloc_types<sh_type, size, big_endian>::reloc_size; |
| 1307 | |
| 1308 | size_t local_count = this->local_symbol_count(); |
| 1309 | |
| 1310 | std::vector<section_offset_type> non_split_refs; |
| 1311 | |
| 1312 | const unsigned char* pr = prelocs; |
| 1313 | for (size_t i = 0; i < reloc_count; ++i, pr += reloc_size) |
| 1314 | { |
| 1315 | Reltype reloc(pr); |
| 1316 | |
| 1317 | typename elfcpp::Elf_types<size>::Elf_WXword r_info = reloc.get_r_info(); |
| 1318 | unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); |
| 1319 | if (r_sym < local_count) |
| 1320 | continue; |
| 1321 | |
| 1322 | const Symbol* gsym = this->global_symbol(r_sym); |
| 1323 | gold_assert(gsym != NULL); |
| 1324 | if (gsym->is_forwarder()) |
| 1325 | gsym = symtab->resolve_forwards(gsym); |
| 1326 | |
| 1327 | // See if this relocation refers to a function defined in an |
| 1328 | // object compiled without -fsplit-stack. Note that we don't |
| 1329 | // care about the type of relocation--this means that in some |
| 1330 | // cases we will ask for a large stack unnecessarily, but this |
| 1331 | // is not fatal. FIXME: Some targets have symbols which are |
| 1332 | // functions but are not type STT_FUNC, e.g., STT_ARM_TFUNC. |
| 1333 | if (!gsym->is_undefined() |
| 1334 | && gsym->source() == Symbol::FROM_OBJECT |
| 1335 | && !gsym->object()->uses_split_stack()) |
| 1336 | { |
| 1337 | unsigned int r_type = elfcpp::elf_r_type<size>(reloc.get_r_info()); |
| 1338 | if (parameters->target().is_call_to_non_split(gsym, r_type)) |
| 1339 | { |
| 1340 | section_offset_type offset = |
| 1341 | convert_to_section_size_type(reloc.get_r_offset()); |
| 1342 | non_split_refs.push_back(offset); |
| 1343 | } |
| 1344 | } |
| 1345 | } |
| 1346 | |
| 1347 | if (non_split_refs.empty()) |
| 1348 | return; |
| 1349 | |
| 1350 | // At this point, every entry in NON_SPLIT_REFS indicates a |
| 1351 | // relocation which refers to a function in an object compiled |
| 1352 | // without -fsplit-stack. We now have to convert that list into a |
| 1353 | // set of offsets to functions. First, we find all the functions. |
| 1354 | |
| 1355 | Function_offsets function_offsets; |
| 1356 | this->find_functions(pshdrs, shndx, &function_offsets); |
| 1357 | if (function_offsets.empty()) |
| 1358 | return; |
| 1359 | |
| 1360 | // Now get a list of the function with references to non split-stack |
| 1361 | // code. |
| 1362 | |
| 1363 | Function_offsets calls_non_split; |
| 1364 | for (std::vector<section_offset_type>::const_iterator p |
| 1365 | = non_split_refs.begin(); |
| 1366 | p != non_split_refs.end(); |
| 1367 | ++p) |
| 1368 | { |
| 1369 | Function_offsets::const_iterator low = function_offsets.lower_bound(*p); |
| 1370 | if (low == function_offsets.end()) |
| 1371 | --low; |
| 1372 | else if (low->first == *p) |
| 1373 | ; |
| 1374 | else if (low == function_offsets.begin()) |
| 1375 | continue; |
| 1376 | else |
| 1377 | --low; |
| 1378 | |
| 1379 | calls_non_split.insert(*low); |
| 1380 | } |
| 1381 | if (calls_non_split.empty()) |
| 1382 | return; |
| 1383 | |
| 1384 | // Now we have a set of functions to adjust. The adjustments are |
| 1385 | // target specific. Besides changing the output section view |
| 1386 | // however, it likes, the target may request a relocation change |
| 1387 | // from one global symbol name to another. |
| 1388 | |
| 1389 | for (Function_offsets::const_iterator p = calls_non_split.begin(); |
| 1390 | p != calls_non_split.end(); |
| 1391 | ++p) |
| 1392 | { |
| 1393 | std::string from; |
| 1394 | std::string to; |
| 1395 | parameters->target().calls_non_split(this, shndx, p->first, p->second, |
| 1396 | view, view_size, &from, &to); |
| 1397 | if (!from.empty()) |
| 1398 | { |
| 1399 | gold_assert(!to.empty()); |
| 1400 | Symbol* tosym = NULL; |
| 1401 | |
| 1402 | // Find relocations in the relevant function which are for |
| 1403 | // FROM. |
| 1404 | pr = prelocs; |
| 1405 | for (size_t i = 0; i < reloc_count; ++i, pr += reloc_size) |
| 1406 | { |
| 1407 | Reltype reloc(pr); |
| 1408 | |
| 1409 | typename elfcpp::Elf_types<size>::Elf_WXword r_info = |
| 1410 | reloc.get_r_info(); |
| 1411 | unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); |
| 1412 | if (r_sym < local_count) |
| 1413 | continue; |
| 1414 | |
| 1415 | section_offset_type offset = |
| 1416 | convert_to_section_size_type(reloc.get_r_offset()); |
| 1417 | if (offset < p->first |
| 1418 | || (offset |
| 1419 | >= (p->first |
| 1420 | + static_cast<section_offset_type>(p->second)))) |
| 1421 | continue; |
| 1422 | |
| 1423 | const Symbol* gsym = this->global_symbol(r_sym); |
| 1424 | if (from == gsym->name()) |
| 1425 | { |
| 1426 | if (tosym == NULL) |
| 1427 | { |
| 1428 | tosym = symtab->lookup(to.c_str()); |
| 1429 | if (tosym == NULL) |
| 1430 | { |
| 1431 | this->error(_("could not convert call " |
| 1432 | "to '%s' to '%s'"), |
| 1433 | from.c_str(), to.c_str()); |
| 1434 | break; |
| 1435 | } |
| 1436 | } |
| 1437 | |
| 1438 | if (*reloc_map == NULL) |
| 1439 | *reloc_map = new Reloc_symbol_changes(reloc_count); |
| 1440 | (*reloc_map)->set(i, tosym); |
| 1441 | } |
| 1442 | } |
| 1443 | } |
| 1444 | } |
| 1445 | } |
| 1446 | |
| 1447 | // Find all the function in this object defined in section SHNDX. |
| 1448 | // Store their offsets in the section in FUNCTION_OFFSETS. |
| 1449 | |
| 1450 | template<int size, bool big_endian> |
| 1451 | void |
| 1452 | Sized_relobj_file<size, big_endian>::find_functions( |
| 1453 | const unsigned char* pshdrs, |
| 1454 | unsigned int shndx, |
| 1455 | Sized_relobj_file<size, big_endian>::Function_offsets* function_offsets) |
| 1456 | { |
| 1457 | // We need to read the symbols to find the functions. If we wanted |
| 1458 | // to, we could cache reading the symbols across all sections in the |
| 1459 | // object. |
| 1460 | const unsigned int symtab_shndx = this->symtab_shndx_; |
| 1461 | typename This::Shdr symtabshdr(pshdrs + symtab_shndx * This::shdr_size); |
| 1462 | gold_assert(symtabshdr.get_sh_type() == elfcpp::SHT_SYMTAB); |
| 1463 | |
| 1464 | typename elfcpp::Elf_types<size>::Elf_WXword sh_size = |
| 1465 | symtabshdr.get_sh_size(); |
| 1466 | const unsigned char* psyms = this->get_view(symtabshdr.get_sh_offset(), |
| 1467 | sh_size, true, true); |
| 1468 | |
| 1469 | const int sym_size = This::sym_size; |
| 1470 | const unsigned int symcount = sh_size / sym_size; |
| 1471 | for (unsigned int i = 0; i < symcount; ++i, psyms += sym_size) |
| 1472 | { |
| 1473 | typename elfcpp::Sym<size, big_endian> isym(psyms); |
| 1474 | |
| 1475 | // FIXME: Some targets can have functions which do not have type |
| 1476 | // STT_FUNC, e.g., STT_ARM_TFUNC. |
| 1477 | if (isym.get_st_type() != elfcpp::STT_FUNC |
| 1478 | || isym.get_st_size() == 0) |
| 1479 | continue; |
| 1480 | |
| 1481 | bool is_ordinary; |
| 1482 | unsigned int sym_shndx = this->adjust_sym_shndx(i, isym.get_st_shndx(), |
| 1483 | &is_ordinary); |
| 1484 | if (!is_ordinary || sym_shndx != shndx) |
| 1485 | continue; |
| 1486 | |
| 1487 | section_offset_type value = |
| 1488 | convert_to_section_size_type(isym.get_st_value()); |
| 1489 | section_size_type fnsize = |
| 1490 | convert_to_section_size_type(isym.get_st_size()); |
| 1491 | |
| 1492 | (*function_offsets)[value] = fnsize; |
| 1493 | } |
| 1494 | } |
| 1495 | |
| 1496 | // Reverse the words in a section. Used for .ctors sections mapped to |
| 1497 | // .init_array sections. See ctors_sections_in_init_array in |
| 1498 | // layout.cc. |
| 1499 | |
| 1500 | template<int size, bool big_endian> |
| 1501 | void |
| 1502 | Sized_relobj_file<size, big_endian>::reverse_words(unsigned char* view, |
| 1503 | section_size_type view_size) |
| 1504 | { |
| 1505 | typedef typename elfcpp::Swap<size, big_endian>::Valtype Valtype; |
| 1506 | Valtype* vview = reinterpret_cast<Valtype*>(view); |
| 1507 | section_size_type vview_size = view_size / (size / 8); |
| 1508 | for (section_size_type i = 0; i < vview_size / 2; ++i) |
| 1509 | { |
| 1510 | Valtype tmp = vview[i]; |
| 1511 | vview[i] = vview[vview_size - 1 - i]; |
| 1512 | vview[vview_size - 1 - i] = tmp; |
| 1513 | } |
| 1514 | } |
| 1515 | |
| 1516 | // Class Merged_symbol_value. |
| 1517 | |
| 1518 | template<int size> |
| 1519 | void |
| 1520 | Merged_symbol_value<size>::initialize_input_to_output_map( |
| 1521 | const Relobj* object, |
| 1522 | unsigned int input_shndx) |
| 1523 | { |
| 1524 | Object_merge_map* map = object->merge_map(); |
| 1525 | map->initialize_input_to_output_map<size>(input_shndx, |
| 1526 | this->output_start_address_, |
| 1527 | &this->output_addresses_); |
| 1528 | } |
| 1529 | |
| 1530 | // Get the output value corresponding to an input offset if we |
| 1531 | // couldn't find it in the hash table. |
| 1532 | |
| 1533 | template<int size> |
| 1534 | typename elfcpp::Elf_types<size>::Elf_Addr |
| 1535 | Merged_symbol_value<size>::value_from_output_section( |
| 1536 | const Relobj* object, |
| 1537 | unsigned int input_shndx, |
| 1538 | typename elfcpp::Elf_types<size>::Elf_Addr input_offset) const |
| 1539 | { |
| 1540 | section_offset_type output_offset; |
| 1541 | bool found = object->merge_map()->get_output_offset(NULL, input_shndx, |
| 1542 | input_offset, |
| 1543 | &output_offset); |
| 1544 | |
| 1545 | // If this assertion fails, it means that some relocation was |
| 1546 | // against a portion of an input merge section which we didn't map |
| 1547 | // to the output file and we didn't explicitly discard. We should |
| 1548 | // always map all portions of input merge sections. |
| 1549 | gold_assert(found); |
| 1550 | |
| 1551 | if (output_offset == -1) |
| 1552 | return 0; |
| 1553 | else |
| 1554 | return this->output_start_address_ + output_offset; |
| 1555 | } |
| 1556 | |
| 1557 | // Track_relocs methods. |
| 1558 | |
| 1559 | // Initialize the class to track the relocs. This gets the object, |
| 1560 | // the reloc section index, and the type of the relocs. This returns |
| 1561 | // false if something goes wrong. |
| 1562 | |
| 1563 | template<int size, bool big_endian> |
| 1564 | bool |
| 1565 | Track_relocs<size, big_endian>::initialize( |
| 1566 | Object* object, |
| 1567 | unsigned int reloc_shndx, |
| 1568 | unsigned int reloc_type) |
| 1569 | { |
| 1570 | // If RELOC_SHNDX is -1U, it means there is more than one reloc |
| 1571 | // section for the .eh_frame section. We can't handle that case. |
| 1572 | if (reloc_shndx == -1U) |
| 1573 | return false; |
| 1574 | |
| 1575 | // If RELOC_SHNDX is 0, there is no reloc section. |
| 1576 | if (reloc_shndx == 0) |
| 1577 | return true; |
| 1578 | |
| 1579 | // Get the contents of the reloc section. |
| 1580 | this->prelocs_ = object->section_contents(reloc_shndx, &this->len_, false); |
| 1581 | |
| 1582 | if (reloc_type == elfcpp::SHT_REL) |
| 1583 | this->reloc_size_ = elfcpp::Elf_sizes<size>::rel_size; |
| 1584 | else if (reloc_type == elfcpp::SHT_RELA) |
| 1585 | this->reloc_size_ = elfcpp::Elf_sizes<size>::rela_size; |
| 1586 | else |
| 1587 | gold_unreachable(); |
| 1588 | |
| 1589 | if (this->len_ % this->reloc_size_ != 0) |
| 1590 | { |
| 1591 | object->error(_("reloc section size %zu is not a multiple of " |
| 1592 | "reloc size %d\n"), |
| 1593 | static_cast<size_t>(this->len_), |
| 1594 | this->reloc_size_); |
| 1595 | return false; |
| 1596 | } |
| 1597 | |
| 1598 | return true; |
| 1599 | } |
| 1600 | |
| 1601 | // Return the offset of the next reloc, or -1 if there isn't one. |
| 1602 | |
| 1603 | template<int size, bool big_endian> |
| 1604 | off_t |
| 1605 | Track_relocs<size, big_endian>::next_offset() const |
| 1606 | { |
| 1607 | if (this->pos_ >= this->len_) |
| 1608 | return -1; |
| 1609 | |
| 1610 | // Rel and Rela start out the same, so we can always use Rel to find |
| 1611 | // the r_offset value. |
| 1612 | elfcpp::Rel<size, big_endian> rel(this->prelocs_ + this->pos_); |
| 1613 | return rel.get_r_offset(); |
| 1614 | } |
| 1615 | |
| 1616 | // Return the index of the symbol referenced by the next reloc, or -1U |
| 1617 | // if there aren't any more relocs. |
| 1618 | |
| 1619 | template<int size, bool big_endian> |
| 1620 | unsigned int |
| 1621 | Track_relocs<size, big_endian>::next_symndx() const |
| 1622 | { |
| 1623 | if (this->pos_ >= this->len_) |
| 1624 | return -1U; |
| 1625 | |
| 1626 | // Rel and Rela start out the same, so we can use Rel to find the |
| 1627 | // symbol index. |
| 1628 | elfcpp::Rel<size, big_endian> rel(this->prelocs_ + this->pos_); |
| 1629 | return elfcpp::elf_r_sym<size>(rel.get_r_info()); |
| 1630 | } |
| 1631 | |
| 1632 | // Return the addend of the next reloc, or 0 if there isn't one. |
| 1633 | |
| 1634 | template<int size, bool big_endian> |
| 1635 | uint64_t |
| 1636 | Track_relocs<size, big_endian>::next_addend() const |
| 1637 | { |
| 1638 | if (this->pos_ >= this->len_) |
| 1639 | return 0; |
| 1640 | if (this->reloc_size_ == elfcpp::Elf_sizes<size>::rel_size) |
| 1641 | return 0; |
| 1642 | elfcpp::Rela<size, big_endian> rela(this->prelocs_ + this->pos_); |
| 1643 | return rela.get_r_addend(); |
| 1644 | } |
| 1645 | |
| 1646 | // Advance to the next reloc whose r_offset is greater than or equal |
| 1647 | // to OFFSET. Return the number of relocs we skip. |
| 1648 | |
| 1649 | template<int size, bool big_endian> |
| 1650 | int |
| 1651 | Track_relocs<size, big_endian>::advance(off_t offset) |
| 1652 | { |
| 1653 | int ret = 0; |
| 1654 | while (this->pos_ < this->len_) |
| 1655 | { |
| 1656 | // Rel and Rela start out the same, so we can always use Rel to |
| 1657 | // find the r_offset value. |
| 1658 | elfcpp::Rel<size, big_endian> rel(this->prelocs_ + this->pos_); |
| 1659 | if (static_cast<off_t>(rel.get_r_offset()) >= offset) |
| 1660 | break; |
| 1661 | ++ret; |
| 1662 | this->pos_ += this->reloc_size_; |
| 1663 | } |
| 1664 | return ret; |
| 1665 | } |
| 1666 | |
| 1667 | // Instantiate the templates we need. |
| 1668 | |
| 1669 | #ifdef HAVE_TARGET_32_LITTLE |
| 1670 | template |
| 1671 | void |
| 1672 | Sized_relobj_file<32, false>::do_read_relocs(Read_relocs_data* rd); |
| 1673 | #endif |
| 1674 | |
| 1675 | #ifdef HAVE_TARGET_32_BIG |
| 1676 | template |
| 1677 | void |
| 1678 | Sized_relobj_file<32, true>::do_read_relocs(Read_relocs_data* rd); |
| 1679 | #endif |
| 1680 | |
| 1681 | #ifdef HAVE_TARGET_64_LITTLE |
| 1682 | template |
| 1683 | void |
| 1684 | Sized_relobj_file<64, false>::do_read_relocs(Read_relocs_data* rd); |
| 1685 | #endif |
| 1686 | |
| 1687 | #ifdef HAVE_TARGET_64_BIG |
| 1688 | template |
| 1689 | void |
| 1690 | Sized_relobj_file<64, true>::do_read_relocs(Read_relocs_data* rd); |
| 1691 | #endif |
| 1692 | |
| 1693 | #ifdef HAVE_TARGET_32_LITTLE |
| 1694 | template |
| 1695 | void |
| 1696 | Sized_relobj_file<32, false>::do_gc_process_relocs(Symbol_table* symtab, |
| 1697 | Layout* layout, |
| 1698 | Read_relocs_data* rd); |
| 1699 | #endif |
| 1700 | |
| 1701 | #ifdef HAVE_TARGET_32_BIG |
| 1702 | template |
| 1703 | void |
| 1704 | Sized_relobj_file<32, true>::do_gc_process_relocs(Symbol_table* symtab, |
| 1705 | Layout* layout, |
| 1706 | Read_relocs_data* rd); |
| 1707 | #endif |
| 1708 | |
| 1709 | #ifdef HAVE_TARGET_64_LITTLE |
| 1710 | template |
| 1711 | void |
| 1712 | Sized_relobj_file<64, false>::do_gc_process_relocs(Symbol_table* symtab, |
| 1713 | Layout* layout, |
| 1714 | Read_relocs_data* rd); |
| 1715 | #endif |
| 1716 | |
| 1717 | #ifdef HAVE_TARGET_64_BIG |
| 1718 | template |
| 1719 | void |
| 1720 | Sized_relobj_file<64, true>::do_gc_process_relocs(Symbol_table* symtab, |
| 1721 | Layout* layout, |
| 1722 | Read_relocs_data* rd); |
| 1723 | #endif |
| 1724 | |
| 1725 | #ifdef HAVE_TARGET_32_LITTLE |
| 1726 | template |
| 1727 | void |
| 1728 | Sized_relobj_file<32, false>::do_scan_relocs(Symbol_table* symtab, |
| 1729 | Layout* layout, |
| 1730 | Read_relocs_data* rd); |
| 1731 | #endif |
| 1732 | |
| 1733 | #ifdef HAVE_TARGET_32_BIG |
| 1734 | template |
| 1735 | void |
| 1736 | Sized_relobj_file<32, true>::do_scan_relocs(Symbol_table* symtab, |
| 1737 | Layout* layout, |
| 1738 | Read_relocs_data* rd); |
| 1739 | #endif |
| 1740 | |
| 1741 | #ifdef HAVE_TARGET_64_LITTLE |
| 1742 | template |
| 1743 | void |
| 1744 | Sized_relobj_file<64, false>::do_scan_relocs(Symbol_table* symtab, |
| 1745 | Layout* layout, |
| 1746 | Read_relocs_data* rd); |
| 1747 | #endif |
| 1748 | |
| 1749 | #ifdef HAVE_TARGET_64_BIG |
| 1750 | template |
| 1751 | void |
| 1752 | Sized_relobj_file<64, true>::do_scan_relocs(Symbol_table* symtab, |
| 1753 | Layout* layout, |
| 1754 | Read_relocs_data* rd); |
| 1755 | #endif |
| 1756 | |
| 1757 | #ifdef HAVE_TARGET_32_LITTLE |
| 1758 | template |
| 1759 | void |
| 1760 | Sized_relobj_file<32, false>::do_relocate(const Symbol_table* symtab, |
| 1761 | const Layout* layout, |
| 1762 | Output_file* of); |
| 1763 | #endif |
| 1764 | |
| 1765 | #ifdef HAVE_TARGET_32_BIG |
| 1766 | template |
| 1767 | void |
| 1768 | Sized_relobj_file<32, true>::do_relocate(const Symbol_table* symtab, |
| 1769 | const Layout* layout, |
| 1770 | Output_file* of); |
| 1771 | #endif |
| 1772 | |
| 1773 | #ifdef HAVE_TARGET_64_LITTLE |
| 1774 | template |
| 1775 | void |
| 1776 | Sized_relobj_file<64, false>::do_relocate(const Symbol_table* symtab, |
| 1777 | const Layout* layout, |
| 1778 | Output_file* of); |
| 1779 | #endif |
| 1780 | |
| 1781 | #ifdef HAVE_TARGET_64_BIG |
| 1782 | template |
| 1783 | void |
| 1784 | Sized_relobj_file<64, true>::do_relocate(const Symbol_table* symtab, |
| 1785 | const Layout* layout, |
| 1786 | Output_file* of); |
| 1787 | #endif |
| 1788 | |
| 1789 | #ifdef HAVE_TARGET_32_LITTLE |
| 1790 | template |
| 1791 | void |
| 1792 | Sized_relobj_file<32, false>::do_relocate_sections( |
| 1793 | const Symbol_table* symtab, |
| 1794 | const Layout* layout, |
| 1795 | const unsigned char* pshdrs, |
| 1796 | Output_file* of, |
| 1797 | Views* pviews); |
| 1798 | #endif |
| 1799 | |
| 1800 | #ifdef HAVE_TARGET_32_BIG |
| 1801 | template |
| 1802 | void |
| 1803 | Sized_relobj_file<32, true>::do_relocate_sections( |
| 1804 | const Symbol_table* symtab, |
| 1805 | const Layout* layout, |
| 1806 | const unsigned char* pshdrs, |
| 1807 | Output_file* of, |
| 1808 | Views* pviews); |
| 1809 | #endif |
| 1810 | |
| 1811 | #ifdef HAVE_TARGET_64_LITTLE |
| 1812 | template |
| 1813 | void |
| 1814 | Sized_relobj_file<64, false>::do_relocate_sections( |
| 1815 | const Symbol_table* symtab, |
| 1816 | const Layout* layout, |
| 1817 | const unsigned char* pshdrs, |
| 1818 | Output_file* of, |
| 1819 | Views* pviews); |
| 1820 | #endif |
| 1821 | |
| 1822 | #ifdef HAVE_TARGET_64_BIG |
| 1823 | template |
| 1824 | void |
| 1825 | Sized_relobj_file<64, true>::do_relocate_sections( |
| 1826 | const Symbol_table* symtab, |
| 1827 | const Layout* layout, |
| 1828 | const unsigned char* pshdrs, |
| 1829 | Output_file* of, |
| 1830 | Views* pviews); |
| 1831 | #endif |
| 1832 | |
| 1833 | #ifdef HAVE_TARGET_32_LITTLE |
| 1834 | template |
| 1835 | void |
| 1836 | Sized_relobj_file<32, false>::initialize_input_to_output_maps(); |
| 1837 | |
| 1838 | template |
| 1839 | void |
| 1840 | Sized_relobj_file<32, false>::free_input_to_output_maps(); |
| 1841 | #endif |
| 1842 | |
| 1843 | #ifdef HAVE_TARGET_32_BIG |
| 1844 | template |
| 1845 | void |
| 1846 | Sized_relobj_file<32, true>::initialize_input_to_output_maps(); |
| 1847 | |
| 1848 | template |
| 1849 | void |
| 1850 | Sized_relobj_file<32, true>::free_input_to_output_maps(); |
| 1851 | #endif |
| 1852 | |
| 1853 | #ifdef HAVE_TARGET_64_LITTLE |
| 1854 | template |
| 1855 | void |
| 1856 | Sized_relobj_file<64, false>::initialize_input_to_output_maps(); |
| 1857 | |
| 1858 | template |
| 1859 | void |
| 1860 | Sized_relobj_file<64, false>::free_input_to_output_maps(); |
| 1861 | #endif |
| 1862 | |
| 1863 | #ifdef HAVE_TARGET_64_BIG |
| 1864 | template |
| 1865 | void |
| 1866 | Sized_relobj_file<64, true>::initialize_input_to_output_maps(); |
| 1867 | |
| 1868 | template |
| 1869 | void |
| 1870 | Sized_relobj_file<64, true>::free_input_to_output_maps(); |
| 1871 | #endif |
| 1872 | |
| 1873 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) |
| 1874 | template |
| 1875 | class Merged_symbol_value<32>; |
| 1876 | #endif |
| 1877 | |
| 1878 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) |
| 1879 | template |
| 1880 | class Merged_symbol_value<64>; |
| 1881 | #endif |
| 1882 | |
| 1883 | #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG) |
| 1884 | template |
| 1885 | class Symbol_value<32>; |
| 1886 | #endif |
| 1887 | |
| 1888 | #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG) |
| 1889 | template |
| 1890 | class Symbol_value<64>; |
| 1891 | #endif |
| 1892 | |
| 1893 | #ifdef HAVE_TARGET_32_LITTLE |
| 1894 | template |
| 1895 | class Track_relocs<32, false>; |
| 1896 | #endif |
| 1897 | |
| 1898 | #ifdef HAVE_TARGET_32_BIG |
| 1899 | template |
| 1900 | class Track_relocs<32, true>; |
| 1901 | #endif |
| 1902 | |
| 1903 | #ifdef HAVE_TARGET_64_LITTLE |
| 1904 | template |
| 1905 | class Track_relocs<64, false>; |
| 1906 | #endif |
| 1907 | |
| 1908 | #ifdef HAVE_TARGET_64_BIG |
| 1909 | template |
| 1910 | class Track_relocs<64, true>; |
| 1911 | #endif |
| 1912 | |
| 1913 | } // End namespace gold. |