* configure.ac (AC_CHECK_FUNCS): Sort into alphabetical order.
[binutils.git] / gold / reloc.cc
blob858778e8e4d883afeddcccfc6541ac468ca450f1
1 // reloc.cc -- relocate input files for gold.
3 // Copyright 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
4 // Written by Ian Lance Taylor <iant@google.com>.
6 // This file is part of gold.
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.
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.
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.
23 #include "gold.h"
25 #include <algorithm>
27 #include "workqueue.h"
28 #include "symtab.h"
29 #include "output.h"
30 #include "merge.h"
31 #include "object.h"
32 #include "target-reloc.h"
33 #include "reloc.h"
34 #include "icf.h"
36 namespace gold
39 // Read_relocs methods.
41 // These tasks just read the relocation information from the file.
42 // After reading it, the start another task to process the
43 // information. These tasks requires access to the file.
45 Task_token*
46 Read_relocs::is_runnable()
48 return this->object_->is_locked() ? this->object_->token() : NULL;
51 // Lock the file.
53 void
54 Read_relocs::locks(Task_locker* tl)
56 tl->add(this, this->object_->token());
59 // Read the relocations and then start a Scan_relocs_task.
61 void
62 Read_relocs::run(Workqueue* workqueue)
64 Read_relocs_data *rd = new Read_relocs_data;
65 this->object_->read_relocs(rd);
66 this->object_->set_relocs_data(rd);
67 this->object_->release();
69 // If garbage collection or identical comdat folding is desired, we
70 // process the relocs first before scanning them. Scanning of relocs is
71 // done only after garbage or identical sections is identified.
72 if (parameters->options().gc_sections()
73 || parameters->options().icf_enabled())
75 workqueue->queue_next(new Gc_process_relocs(this->symtab_,
76 this->layout_,
77 this->object_, rd,
78 this->symtab_lock_,
79 this->blocker_));
81 else
83 workqueue->queue_next(new Scan_relocs(this->symtab_, this->layout_,
84 this->object_, rd,
85 this->symtab_lock_,
86 this->blocker_));
90 // Return a debugging name for the task.
92 std::string
93 Read_relocs::get_name() const
95 return "Read_relocs " + this->object_->name();
98 // Gc_process_relocs methods.
100 // These tasks process the relocations read by Read_relocs and
101 // determine which sections are referenced and which are garbage.
102 // This task is done only when --gc-sections is used.
104 Task_token*
105 Gc_process_relocs::is_runnable()
107 if (this->object_->is_locked())
108 return this->object_->token();
109 return NULL;
112 void
113 Gc_process_relocs::locks(Task_locker* tl)
115 tl->add(this, this->object_->token());
116 tl->add(this, this->blocker_);
119 void
120 Gc_process_relocs::run(Workqueue*)
122 this->object_->gc_process_relocs(this->symtab_, this->layout_, this->rd_);
123 this->object_->release();
126 // Return a debugging name for the task.
128 std::string
129 Gc_process_relocs::get_name() const
131 return "Gc_process_relocs " + this->object_->name();
134 // Scan_relocs methods.
136 // These tasks scan the relocations read by Read_relocs and mark up
137 // the symbol table to indicate which relocations are required. We
138 // use a lock on the symbol table to keep them from interfering with
139 // each other.
141 Task_token*
142 Scan_relocs::is_runnable()
144 if (!this->symtab_lock_->is_writable())
145 return this->symtab_lock_;
146 if (this->object_->is_locked())
147 return this->object_->token();
148 return NULL;
151 // Return the locks we hold: one on the file, one on the symbol table
152 // and one blocker.
154 void
155 Scan_relocs::locks(Task_locker* tl)
157 tl->add(this, this->object_->token());
158 tl->add(this, this->symtab_lock_);
159 tl->add(this, this->blocker_);
162 // Scan the relocs.
164 void
165 Scan_relocs::run(Workqueue*)
167 this->object_->scan_relocs(this->symtab_, this->layout_, this->rd_);
168 this->object_->release();
169 delete this->rd_;
170 this->rd_ = NULL;
173 // Return a debugging name for the task.
175 std::string
176 Scan_relocs::get_name() const
178 return "Scan_relocs " + this->object_->name();
181 // Relocate_task methods.
183 // We may have to wait for the output sections to be written.
185 Task_token*
186 Relocate_task::is_runnable()
188 if (this->object_->relocs_must_follow_section_writes()
189 && this->output_sections_blocker_->is_blocked())
190 return this->output_sections_blocker_;
192 if (this->object_->is_locked())
193 return this->object_->token();
195 return NULL;
198 // We want to lock the file while we run. We want to unblock
199 // INPUT_SECTIONS_BLOCKER and FINAL_BLOCKER when we are done.
200 // INPUT_SECTIONS_BLOCKER may be NULL.
202 void
203 Relocate_task::locks(Task_locker* tl)
205 if (this->input_sections_blocker_ != NULL)
206 tl->add(this, this->input_sections_blocker_);
207 tl->add(this, this->final_blocker_);
208 tl->add(this, this->object_->token());
211 // Run the task.
213 void
214 Relocate_task::run(Workqueue*)
216 this->object_->relocate(this->symtab_, this->layout_, this->of_);
218 // This is normally the last thing we will do with an object, so
219 // uncache all views.
220 this->object_->clear_view_cache_marks();
222 this->object_->release();
225 // Return a debugging name for the task.
227 std::string
228 Relocate_task::get_name() const
230 return "Relocate_task " + this->object_->name();
233 // Read the relocs and local symbols from the object file and store
234 // the information in RD.
236 template<int size, bool big_endian>
237 void
238 Sized_relobj<size, big_endian>::do_read_relocs(Read_relocs_data* rd)
240 rd->relocs.clear();
242 unsigned int shnum = this->shnum();
243 if (shnum == 0)
244 return;
246 rd->relocs.reserve(shnum / 2);
248 const Output_sections& out_sections(this->output_sections());
249 const std::vector<Address>& out_offsets(this->section_offsets_);
251 const unsigned char *pshdrs = this->get_view(this->elf_file_.shoff(),
252 shnum * This::shdr_size,
253 true, true);
254 // Skip the first, dummy, section.
255 const unsigned char *ps = pshdrs + This::shdr_size;
256 for (unsigned int i = 1; i < shnum; ++i, ps += This::shdr_size)
258 typename This::Shdr shdr(ps);
260 unsigned int sh_type = shdr.get_sh_type();
261 if (sh_type != elfcpp::SHT_REL && sh_type != elfcpp::SHT_RELA)
262 continue;
264 unsigned int shndx = this->adjust_shndx(shdr.get_sh_info());
265 if (shndx >= shnum)
267 this->error(_("relocation section %u has bad info %u"),
268 i, shndx);
269 continue;
272 Output_section* os = out_sections[shndx];
273 if (os == NULL)
274 continue;
276 // We are scanning relocations in order to fill out the GOT and
277 // PLT sections. Relocations for sections which are not
278 // allocated (typically debugging sections) should not add new
279 // GOT and PLT entries. So we skip them unless this is a
280 // relocatable link or we need to emit relocations. FIXME: What
281 // should we do if a linker script maps a section with SHF_ALLOC
282 // clear to a section with SHF_ALLOC set?
283 typename This::Shdr secshdr(pshdrs + shndx * This::shdr_size);
284 bool is_section_allocated = ((secshdr.get_sh_flags() & elfcpp::SHF_ALLOC)
285 != 0);
286 if (!is_section_allocated
287 && !parameters->options().relocatable()
288 && !parameters->options().emit_relocs())
289 continue;
291 if (this->adjust_shndx(shdr.get_sh_link()) != this->symtab_shndx_)
293 this->error(_("relocation section %u uses unexpected "
294 "symbol table %u"),
295 i, this->adjust_shndx(shdr.get_sh_link()));
296 continue;
299 off_t sh_size = shdr.get_sh_size();
301 unsigned int reloc_size;
302 if (sh_type == elfcpp::SHT_REL)
303 reloc_size = elfcpp::Elf_sizes<size>::rel_size;
304 else
305 reloc_size = elfcpp::Elf_sizes<size>::rela_size;
306 if (reloc_size != shdr.get_sh_entsize())
308 this->error(_("unexpected entsize for reloc section %u: %lu != %u"),
309 i, static_cast<unsigned long>(shdr.get_sh_entsize()),
310 reloc_size);
311 continue;
314 size_t reloc_count = sh_size / reloc_size;
315 if (static_cast<off_t>(reloc_count * reloc_size) != sh_size)
317 this->error(_("reloc section %u size %lu uneven"),
318 i, static_cast<unsigned long>(sh_size));
319 continue;
322 rd->relocs.push_back(Section_relocs());
323 Section_relocs& sr(rd->relocs.back());
324 sr.reloc_shndx = i;
325 sr.data_shndx = shndx;
326 sr.contents = this->get_lasting_view(shdr.get_sh_offset(), sh_size,
327 true, true);
328 sr.sh_type = sh_type;
329 sr.reloc_count = reloc_count;
330 sr.output_section = os;
331 sr.needs_special_offset_handling = out_offsets[shndx] == invalid_address;
332 sr.is_data_section_allocated = is_section_allocated;
335 // Read the local symbols.
336 gold_assert(this->symtab_shndx_ != -1U);
337 if (this->symtab_shndx_ == 0 || this->local_symbol_count_ == 0)
338 rd->local_symbols = NULL;
339 else
341 typename This::Shdr symtabshdr(pshdrs
342 + this->symtab_shndx_ * This::shdr_size);
343 gold_assert(symtabshdr.get_sh_type() == elfcpp::SHT_SYMTAB);
344 const int sym_size = This::sym_size;
345 const unsigned int loccount = this->local_symbol_count_;
346 gold_assert(loccount == symtabshdr.get_sh_info());
347 off_t locsize = loccount * sym_size;
348 rd->local_symbols = this->get_lasting_view(symtabshdr.get_sh_offset(),
349 locsize, true, true);
353 // Process the relocs to generate mappings from source sections to referenced
354 // sections. This is used during garbage colletion to determine garbage
355 // sections.
357 template<int size, bool big_endian>
358 void
359 Sized_relobj<size, big_endian>::do_gc_process_relocs(Symbol_table* symtab,
360 Layout* layout,
361 Read_relocs_data* rd)
363 Sized_target<size, big_endian>* target =
364 parameters->sized_target<size, big_endian>();
366 const unsigned char* local_symbols;
367 if (rd->local_symbols == NULL)
368 local_symbols = NULL;
369 else
370 local_symbols = rd->local_symbols->data();
372 for (Read_relocs_data::Relocs_list::iterator p = rd->relocs.begin();
373 p != rd->relocs.end();
374 ++p)
376 if (!parameters->options().relocatable())
378 // As noted above, when not generating an object file, we
379 // only scan allocated sections. We may see a non-allocated
380 // section here if we are emitting relocs.
381 if (p->is_data_section_allocated)
382 target->gc_process_relocs(symtab, layout, this,
383 p->data_shndx, p->sh_type,
384 p->contents->data(), p->reloc_count,
385 p->output_section,
386 p->needs_special_offset_handling,
387 this->local_symbol_count_,
388 local_symbols);
394 // Scan the relocs and adjust the symbol table. This looks for
395 // relocations which require GOT/PLT/COPY relocations.
397 template<int size, bool big_endian>
398 void
399 Sized_relobj<size, big_endian>::do_scan_relocs(Symbol_table* symtab,
400 Layout* layout,
401 Read_relocs_data* rd)
403 Sized_target<size, big_endian>* target =
404 parameters->sized_target<size, big_endian>();
406 const unsigned char* local_symbols;
407 if (rd->local_symbols == NULL)
408 local_symbols = NULL;
409 else
410 local_symbols = rd->local_symbols->data();
412 for (Read_relocs_data::Relocs_list::iterator p = rd->relocs.begin();
413 p != rd->relocs.end();
414 ++p)
416 // When garbage collection is on, unreferenced sections are not included
417 // in the link that would have been included normally. This is known only
418 // after Read_relocs hence this check has to be done again.
419 if (parameters->options().gc_sections()
420 || parameters->options().icf_enabled())
422 if (p->output_section == NULL)
423 continue;
425 if (!parameters->options().relocatable())
427 // As noted above, when not generating an object file, we
428 // only scan allocated sections. We may see a non-allocated
429 // section here if we are emitting relocs.
430 if (p->is_data_section_allocated)
431 target->scan_relocs(symtab, layout, this, p->data_shndx,
432 p->sh_type, p->contents->data(),
433 p->reloc_count, p->output_section,
434 p->needs_special_offset_handling,
435 this->local_symbol_count_,
436 local_symbols);
437 if (parameters->options().emit_relocs())
438 this->emit_relocs_scan(symtab, layout, local_symbols, p);
440 else
442 Relocatable_relocs* rr = this->relocatable_relocs(p->reloc_shndx);
443 gold_assert(rr != NULL);
444 rr->set_reloc_count(p->reloc_count);
445 target->scan_relocatable_relocs(symtab, layout, this,
446 p->data_shndx, p->sh_type,
447 p->contents->data(),
448 p->reloc_count,
449 p->output_section,
450 p->needs_special_offset_handling,
451 this->local_symbol_count_,
452 local_symbols,
453 rr);
456 delete p->contents;
457 p->contents = NULL;
460 if (rd->local_symbols != NULL)
462 delete rd->local_symbols;
463 rd->local_symbols = NULL;
467 // This is a strategy class we use when scanning for --emit-relocs.
469 template<int sh_type>
470 class Emit_relocs_strategy
472 public:
473 // A local non-section symbol.
474 inline Relocatable_relocs::Reloc_strategy
475 local_non_section_strategy(unsigned int, Relobj*, unsigned int)
476 { return Relocatable_relocs::RELOC_COPY; }
478 // A local section symbol.
479 inline Relocatable_relocs::Reloc_strategy
480 local_section_strategy(unsigned int, Relobj*)
482 if (sh_type == elfcpp::SHT_RELA)
483 return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA;
484 else
486 // The addend is stored in the section contents. Since this
487 // is not a relocatable link, we are going to apply the
488 // relocation contents to the section as usual. This means
489 // that we have no way to record the original addend. If the
490 // original addend is not zero, there is basically no way for
491 // the user to handle this correctly. Caveat emptor.
492 return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_0;
496 // A global symbol.
497 inline Relocatable_relocs::Reloc_strategy
498 global_strategy(unsigned int, Relobj*, unsigned int)
499 { return Relocatable_relocs::RELOC_COPY; }
502 // Scan the input relocations for --emit-relocs.
504 template<int size, bool big_endian>
505 void
506 Sized_relobj<size, big_endian>::emit_relocs_scan(
507 Symbol_table* symtab,
508 Layout* layout,
509 const unsigned char* plocal_syms,
510 const Read_relocs_data::Relocs_list::iterator& p)
512 Relocatable_relocs* rr = this->relocatable_relocs(p->reloc_shndx);
513 gold_assert(rr != NULL);
514 rr->set_reloc_count(p->reloc_count);
516 if (p->sh_type == elfcpp::SHT_REL)
517 this->emit_relocs_scan_reltype<elfcpp::SHT_REL>(symtab, layout,
518 plocal_syms, p, rr);
519 else
521 gold_assert(p->sh_type == elfcpp::SHT_RELA);
522 this->emit_relocs_scan_reltype<elfcpp::SHT_RELA>(symtab, layout,
523 plocal_syms, p, rr);
527 // Scan the input relocation for --emit-relocs, templatized on the
528 // type of the relocation section.
530 template<int size, bool big_endian>
531 template<int sh_type>
532 void
533 Sized_relobj<size, big_endian>::emit_relocs_scan_reltype(
534 Symbol_table* symtab,
535 Layout* layout,
536 const unsigned char* plocal_syms,
537 const Read_relocs_data::Relocs_list::iterator& p,
538 Relocatable_relocs* rr)
540 scan_relocatable_relocs<size, big_endian, sh_type,
541 Emit_relocs_strategy<sh_type> >(
542 symtab,
543 layout,
544 this,
545 p->data_shndx,
546 p->contents->data(),
547 p->reloc_count,
548 p->output_section,
549 p->needs_special_offset_handling,
550 this->local_symbol_count_,
551 plocal_syms,
552 rr);
555 // Relocate the input sections and write out the local symbols.
557 template<int size, bool big_endian>
558 void
559 Sized_relobj<size, big_endian>::do_relocate(const Symbol_table* symtab,
560 const Layout* layout,
561 Output_file* of)
563 unsigned int shnum = this->shnum();
565 // Read the section headers.
566 const unsigned char* pshdrs = this->get_view(this->elf_file_.shoff(),
567 shnum * This::shdr_size,
568 true, true);
570 Views views;
571 views.resize(shnum);
573 // Make two passes over the sections. The first one copies the
574 // section data to the output file. The second one applies
575 // relocations.
577 this->write_sections(pshdrs, of, &views);
579 // To speed up relocations, we set up hash tables for fast lookup of
580 // input offsets to output addresses.
581 this->initialize_input_to_output_maps();
583 // Apply relocations.
585 this->relocate_sections(symtab, layout, pshdrs, &views);
587 // After we've done the relocations, we release the hash tables,
588 // since we no longer need them.
589 this->free_input_to_output_maps();
591 // Write out the accumulated views.
592 for (unsigned int i = 1; i < shnum; ++i)
594 if (views[i].view != NULL)
596 if (!views[i].is_postprocessing_view)
598 if (views[i].is_input_output_view)
599 of->write_input_output_view(views[i].offset,
600 views[i].view_size,
601 views[i].view);
602 else
603 of->write_output_view(views[i].offset, views[i].view_size,
604 views[i].view);
609 // Write out the local symbols.
610 this->write_local_symbols(of, layout->sympool(), layout->dynpool(),
611 layout->symtab_xindex(), layout->dynsym_xindex());
613 // We should no longer need the local symbol values.
614 this->clear_local_symbols();
617 // Sort a Read_multiple vector by file offset.
618 struct Read_multiple_compare
620 inline bool
621 operator()(const File_read::Read_multiple_entry& rme1,
622 const File_read::Read_multiple_entry& rme2) const
623 { return rme1.file_offset < rme2.file_offset; }
626 // Write section data to the output file. PSHDRS points to the
627 // section headers. Record the views in *PVIEWS for use when
628 // relocating.
630 template<int size, bool big_endian>
631 void
632 Sized_relobj<size, big_endian>::write_sections(const unsigned char* pshdrs,
633 Output_file* of,
634 Views* pviews)
636 unsigned int shnum = this->shnum();
637 const Output_sections& out_sections(this->output_sections());
638 const std::vector<Address>& out_offsets(this->section_offsets_);
640 File_read::Read_multiple rm;
641 bool is_sorted = true;
643 const unsigned char* p = pshdrs + This::shdr_size;
644 for (unsigned int i = 1; i < shnum; ++i, p += This::shdr_size)
646 View_size* pvs = &(*pviews)[i];
648 pvs->view = NULL;
650 const Output_section* os = out_sections[i];
651 if (os == NULL)
652 continue;
653 Address output_offset = out_offsets[i];
655 typename This::Shdr shdr(p);
657 if (shdr.get_sh_type() == elfcpp::SHT_NOBITS)
658 continue;
660 if ((parameters->options().relocatable()
661 || parameters->options().emit_relocs())
662 && (shdr.get_sh_type() == elfcpp::SHT_REL
663 || shdr.get_sh_type() == elfcpp::SHT_RELA)
664 && (shdr.get_sh_flags() & elfcpp::SHF_ALLOC) == 0)
666 // This is a reloc section in a relocatable link or when
667 // emitting relocs. We don't need to read the input file.
668 // The size and file offset are stored in the
669 // Relocatable_relocs structure.
670 Relocatable_relocs* rr = this->relocatable_relocs(i);
671 gold_assert(rr != NULL);
672 Output_data* posd = rr->output_data();
673 gold_assert(posd != NULL);
675 pvs->offset = posd->offset();
676 pvs->view_size = posd->data_size();
677 pvs->view = of->get_output_view(pvs->offset, pvs->view_size);
678 pvs->address = posd->address();
679 pvs->is_input_output_view = false;
680 pvs->is_postprocessing_view = false;
682 continue;
685 // In the normal case, this input section is simply mapped to
686 // the output section at offset OUTPUT_OFFSET.
688 // However, if OUTPUT_OFFSET == INVALID_ADDRESS, then input data is
689 // handled specially--e.g., a .eh_frame section. The relocation
690 // routines need to check for each reloc where it should be
691 // applied. For this case, we need an input/output view for the
692 // entire contents of the section in the output file. We don't
693 // want to copy the contents of the input section to the output
694 // section; the output section contents were already written,
695 // and we waited for them in Relocate_task::is_runnable because
696 // relocs_must_follow_section_writes is set for the object.
698 // Regardless of which of the above cases is true, we have to
699 // check requires_postprocessing of the output section. If that
700 // is false, then we work with views of the output file
701 // directly. If it is true, then we work with a separate
702 // buffer, and the output section is responsible for writing the
703 // final data to the output file.
705 off_t output_section_offset;
706 Address output_section_size;
707 if (!os->requires_postprocessing())
709 output_section_offset = os->offset();
710 output_section_size = convert_types<Address, off_t>(os->data_size());
712 else
714 output_section_offset = 0;
715 output_section_size =
716 convert_types<Address, off_t>(os->postprocessing_buffer_size());
719 off_t view_start;
720 section_size_type view_size;
721 if (output_offset != invalid_address)
723 view_start = output_section_offset + output_offset;
724 view_size = convert_to_section_size_type(shdr.get_sh_size());
726 else
728 view_start = output_section_offset;
729 view_size = convert_to_section_size_type(output_section_size);
732 if (view_size == 0)
733 continue;
735 gold_assert(output_offset == invalid_address
736 || output_offset + view_size <= output_section_size);
738 unsigned char* view;
739 if (os->requires_postprocessing())
741 unsigned char* buffer = os->postprocessing_buffer();
742 view = buffer + view_start;
743 if (output_offset != invalid_address)
745 off_t sh_offset = shdr.get_sh_offset();
746 if (!rm.empty() && rm.back().file_offset > sh_offset)
747 is_sorted = false;
748 rm.push_back(File_read::Read_multiple_entry(sh_offset,
749 view_size, view));
752 else
754 if (output_offset == invalid_address)
755 view = of->get_input_output_view(view_start, view_size);
756 else
758 view = of->get_output_view(view_start, view_size);
759 off_t sh_offset = shdr.get_sh_offset();
760 if (!rm.empty() && rm.back().file_offset > sh_offset)
761 is_sorted = false;
762 rm.push_back(File_read::Read_multiple_entry(sh_offset,
763 view_size, view));
767 pvs->view = view;
768 pvs->address = os->address();
769 if (output_offset != invalid_address)
770 pvs->address += output_offset;
771 pvs->offset = view_start;
772 pvs->view_size = view_size;
773 pvs->is_input_output_view = output_offset == invalid_address;
774 pvs->is_postprocessing_view = os->requires_postprocessing();
777 // Actually read the data.
778 if (!rm.empty())
780 if (!is_sorted)
781 std::sort(rm.begin(), rm.end(), Read_multiple_compare());
782 this->read_multiple(rm);
786 // Relocate section data. VIEWS points to the section data as views
787 // in the output file.
789 template<int size, bool big_endian>
790 void
791 Sized_relobj<size, big_endian>::do_relocate_sections(
792 const Symbol_table* symtab,
793 const Layout* layout,
794 const unsigned char* pshdrs,
795 Views* pviews)
797 unsigned int shnum = this->shnum();
798 Sized_target<size, big_endian>* target =
799 parameters->sized_target<size, big_endian>();
801 const Output_sections& out_sections(this->output_sections());
802 const std::vector<Address>& out_offsets(this->section_offsets_);
804 Relocate_info<size, big_endian> relinfo;
805 relinfo.symtab = symtab;
806 relinfo.layout = layout;
807 relinfo.object = this;
809 const unsigned char* p = pshdrs + This::shdr_size;
810 for (unsigned int i = 1; i < shnum; ++i, p += This::shdr_size)
812 typename This::Shdr shdr(p);
814 unsigned int sh_type = shdr.get_sh_type();
815 if (sh_type != elfcpp::SHT_REL && sh_type != elfcpp::SHT_RELA)
816 continue;
818 off_t sh_size = shdr.get_sh_size();
819 if (sh_size == 0)
820 continue;
822 unsigned int index = this->adjust_shndx(shdr.get_sh_info());
823 if (index >= this->shnum())
825 this->error(_("relocation section %u has bad info %u"),
826 i, index);
827 continue;
830 Output_section* os = out_sections[index];
831 if (os == NULL)
833 // This relocation section is against a section which we
834 // discarded.
835 continue;
837 Address output_offset = out_offsets[index];
839 gold_assert((*pviews)[index].view != NULL);
840 if (parameters->options().relocatable())
841 gold_assert((*pviews)[i].view != NULL);
843 if (this->adjust_shndx(shdr.get_sh_link()) != this->symtab_shndx_)
845 gold_error(_("relocation section %u uses unexpected "
846 "symbol table %u"),
847 i, this->adjust_shndx(shdr.get_sh_link()));
848 continue;
851 const unsigned char* prelocs = this->get_view(shdr.get_sh_offset(),
852 sh_size, true, false);
854 unsigned int reloc_size;
855 if (sh_type == elfcpp::SHT_REL)
856 reloc_size = elfcpp::Elf_sizes<size>::rel_size;
857 else
858 reloc_size = elfcpp::Elf_sizes<size>::rela_size;
860 if (reloc_size != shdr.get_sh_entsize())
862 gold_error(_("unexpected entsize for reloc section %u: %lu != %u"),
863 i, static_cast<unsigned long>(shdr.get_sh_entsize()),
864 reloc_size);
865 continue;
868 size_t reloc_count = sh_size / reloc_size;
869 if (static_cast<off_t>(reloc_count * reloc_size) != sh_size)
871 gold_error(_("reloc section %u size %lu uneven"),
872 i, static_cast<unsigned long>(sh_size));
873 continue;
876 gold_assert(output_offset != invalid_address
877 || this->relocs_must_follow_section_writes());
879 relinfo.reloc_shndx = i;
880 relinfo.reloc_shdr = p;
881 relinfo.data_shndx = index;
882 relinfo.data_shdr = pshdrs + index * This::shdr_size;
883 unsigned char* view = (*pviews)[index].view;
884 Address address = (*pviews)[index].address;
885 section_size_type view_size = (*pviews)[index].view_size;
887 Reloc_symbol_changes* reloc_map = NULL;
888 if (this->uses_split_stack() && output_offset != invalid_address)
890 typename This::Shdr data_shdr(pshdrs + index * This::shdr_size);
891 if ((data_shdr.get_sh_flags() & elfcpp::SHF_EXECINSTR) != 0)
892 this->split_stack_adjust(symtab, pshdrs, sh_type, index,
893 prelocs, reloc_count, view, view_size,
894 &reloc_map);
897 if (!parameters->options().relocatable())
899 target->relocate_section(&relinfo, sh_type, prelocs, reloc_count, os,
900 output_offset == invalid_address,
901 view, address, view_size, reloc_map);
902 if (parameters->options().emit_relocs())
903 this->emit_relocs(&relinfo, i, sh_type, prelocs, reloc_count,
904 os, output_offset, view, address, view_size,
905 (*pviews)[i].view, (*pviews)[i].view_size);
907 else
909 Relocatable_relocs* rr = this->relocatable_relocs(i);
910 target->relocate_for_relocatable(&relinfo, sh_type, prelocs,
911 reloc_count, os, output_offset, rr,
912 view, address, view_size,
913 (*pviews)[i].view,
914 (*pviews)[i].view_size);
919 // Emit the relocs for --emit-relocs.
921 template<int size, bool big_endian>
922 void
923 Sized_relobj<size, big_endian>::emit_relocs(
924 const Relocate_info<size, big_endian>* relinfo,
925 unsigned int i,
926 unsigned int sh_type,
927 const unsigned char* prelocs,
928 size_t reloc_count,
929 Output_section* output_section,
930 typename elfcpp::Elf_types<size>::Elf_Addr offset_in_output_section,
931 unsigned char* view,
932 typename elfcpp::Elf_types<size>::Elf_Addr address,
933 section_size_type view_size,
934 unsigned char* reloc_view,
935 section_size_type reloc_view_size)
937 if (sh_type == elfcpp::SHT_REL)
938 this->emit_relocs_reltype<elfcpp::SHT_REL>(relinfo, i, prelocs,
939 reloc_count, output_section,
940 offset_in_output_section,
941 view, address, view_size,
942 reloc_view, reloc_view_size);
943 else
945 gold_assert(sh_type == elfcpp::SHT_RELA);
946 this->emit_relocs_reltype<elfcpp::SHT_RELA>(relinfo, i, prelocs,
947 reloc_count, output_section,
948 offset_in_output_section,
949 view, address, view_size,
950 reloc_view, reloc_view_size);
954 // Emit the relocs for --emit-relocs, templatized on the type of the
955 // relocation section.
957 template<int size, bool big_endian>
958 template<int sh_type>
959 void
960 Sized_relobj<size, big_endian>::emit_relocs_reltype(
961 const Relocate_info<size, big_endian>* relinfo,
962 unsigned int i,
963 const unsigned char* prelocs,
964 size_t reloc_count,
965 Output_section* output_section,
966 typename elfcpp::Elf_types<size>::Elf_Addr offset_in_output_section,
967 unsigned char* view,
968 typename elfcpp::Elf_types<size>::Elf_Addr address,
969 section_size_type view_size,
970 unsigned char* reloc_view,
971 section_size_type reloc_view_size)
973 const Relocatable_relocs* rr = this->relocatable_relocs(i);
974 relocate_for_relocatable<size, big_endian, sh_type>(
975 relinfo,
976 prelocs,
977 reloc_count,
978 output_section,
979 offset_in_output_section,
981 view,
982 address,
983 view_size,
984 reloc_view,
985 reloc_view_size);
988 // Create merge hash tables for the local symbols. These are used to
989 // speed up relocations.
991 template<int size, bool big_endian>
992 void
993 Sized_relobj<size, big_endian>::initialize_input_to_output_maps()
995 const unsigned int loccount = this->local_symbol_count_;
996 for (unsigned int i = 1; i < loccount; ++i)
998 Symbol_value<size>& lv(this->local_values_[i]);
999 lv.initialize_input_to_output_map(this);
1003 // Free merge hash tables for the local symbols.
1005 template<int size, bool big_endian>
1006 void
1007 Sized_relobj<size, big_endian>::free_input_to_output_maps()
1009 const unsigned int loccount = this->local_symbol_count_;
1010 for (unsigned int i = 1; i < loccount; ++i)
1012 Symbol_value<size>& lv(this->local_values_[i]);
1013 lv.free_input_to_output_map();
1017 // If an object was compiled with -fsplit-stack, this is called to
1018 // check whether any relocations refer to functions defined in objects
1019 // which were not compiled with -fsplit-stack. If they were, then we
1020 // need to apply some target-specific adjustments to request
1021 // additional stack space.
1023 template<int size, bool big_endian>
1024 void
1025 Sized_relobj<size, big_endian>::split_stack_adjust(
1026 const Symbol_table* symtab,
1027 const unsigned char* pshdrs,
1028 unsigned int sh_type,
1029 unsigned int shndx,
1030 const unsigned char* prelocs,
1031 size_t reloc_count,
1032 unsigned char* view,
1033 section_size_type view_size,
1034 Reloc_symbol_changes** reloc_map)
1036 if (sh_type == elfcpp::SHT_REL)
1037 this->split_stack_adjust_reltype<elfcpp::SHT_REL>(symtab, pshdrs, shndx,
1038 prelocs, reloc_count,
1039 view, view_size,
1040 reloc_map);
1041 else
1043 gold_assert(sh_type == elfcpp::SHT_RELA);
1044 this->split_stack_adjust_reltype<elfcpp::SHT_RELA>(symtab, pshdrs, shndx,
1045 prelocs, reloc_count,
1046 view, view_size,
1047 reloc_map);
1051 // Adjust for -fsplit-stack, templatized on the type of the relocation
1052 // section.
1054 template<int size, bool big_endian>
1055 template<int sh_type>
1056 void
1057 Sized_relobj<size, big_endian>::split_stack_adjust_reltype(
1058 const Symbol_table* symtab,
1059 const unsigned char* pshdrs,
1060 unsigned int shndx,
1061 const unsigned char* prelocs,
1062 size_t reloc_count,
1063 unsigned char* view,
1064 section_size_type view_size,
1065 Reloc_symbol_changes** reloc_map)
1067 typedef typename Reloc_types<sh_type, size, big_endian>::Reloc Reltype;
1068 const int reloc_size = Reloc_types<sh_type, size, big_endian>::reloc_size;
1070 size_t local_count = this->local_symbol_count();
1072 std::vector<section_offset_type> non_split_refs;
1074 const unsigned char* pr = prelocs;
1075 for (size_t i = 0; i < reloc_count; ++i, pr += reloc_size)
1077 Reltype reloc(pr);
1079 typename elfcpp::Elf_types<size>::Elf_WXword r_info = reloc.get_r_info();
1080 unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info);
1081 if (r_sym < local_count)
1082 continue;
1084 const Symbol* gsym = this->global_symbol(r_sym);
1085 gold_assert(gsym != NULL);
1086 if (gsym->is_forwarder())
1087 gsym = symtab->resolve_forwards(gsym);
1089 // See if this relocation refers to a function defined in an
1090 // object compiled without -fsplit-stack. Note that we don't
1091 // care about the type of relocation--this means that in some
1092 // cases we will ask for a large stack unnecessarily, but this
1093 // is not fatal. FIXME: Some targets have symbols which are
1094 // functions but are not type STT_FUNC, e.g., STT_ARM_TFUNC.
1095 if (gsym->type() == elfcpp::STT_FUNC
1096 && !gsym->is_undefined()
1097 && gsym->source() == Symbol::FROM_OBJECT
1098 && !gsym->object()->uses_split_stack())
1100 section_offset_type offset =
1101 convert_to_section_size_type(reloc.get_r_offset());
1102 non_split_refs.push_back(offset);
1106 if (non_split_refs.empty())
1107 return;
1109 // At this point, every entry in NON_SPLIT_REFS indicates a
1110 // relocation which refers to a function in an object compiled
1111 // without -fsplit-stack. We now have to convert that list into a
1112 // set of offsets to functions. First, we find all the functions.
1114 Function_offsets function_offsets;
1115 this->find_functions(pshdrs, shndx, &function_offsets);
1116 if (function_offsets.empty())
1117 return;
1119 // Now get a list of the function with references to non split-stack
1120 // code.
1122 Function_offsets calls_non_split;
1123 for (std::vector<section_offset_type>::const_iterator p
1124 = non_split_refs.begin();
1125 p != non_split_refs.end();
1126 ++p)
1128 Function_offsets::const_iterator low = function_offsets.lower_bound(*p);
1129 if (low == function_offsets.end())
1130 --low;
1131 else if (low->first == *p)
1133 else if (low == function_offsets.begin())
1134 continue;
1135 else
1136 --low;
1138 calls_non_split.insert(*low);
1140 if (calls_non_split.empty())
1141 return;
1143 // Now we have a set of functions to adjust. The adjustments are
1144 // target specific. Besides changing the output section view
1145 // however, it likes, the target may request a relocation change
1146 // from one global symbol name to another.
1148 for (Function_offsets::const_iterator p = calls_non_split.begin();
1149 p != calls_non_split.end();
1150 ++p)
1152 std::string from;
1153 std::string to;
1154 parameters->target().calls_non_split(this, shndx, p->first, p->second,
1155 view, view_size, &from, &to);
1156 if (!from.empty())
1158 gold_assert(!to.empty());
1159 Symbol* tosym = NULL;
1161 // Find relocations in the relevant function which are for
1162 // FROM.
1163 pr = prelocs;
1164 for (size_t i = 0; i < reloc_count; ++i, pr += reloc_size)
1166 Reltype reloc(pr);
1168 typename elfcpp::Elf_types<size>::Elf_WXword r_info =
1169 reloc.get_r_info();
1170 unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info);
1171 if (r_sym < local_count)
1172 continue;
1174 section_offset_type offset =
1175 convert_to_section_size_type(reloc.get_r_offset());
1176 if (offset < p->first
1177 || (offset
1178 >= (p->first
1179 + static_cast<section_offset_type>(p->second))))
1180 continue;
1182 const Symbol* gsym = this->global_symbol(r_sym);
1183 if (from == gsym->name())
1185 if (tosym == NULL)
1187 tosym = symtab->lookup(to.c_str());
1188 if (tosym == NULL)
1190 this->error(_("could not convert call "
1191 "to '%s' to '%s'"),
1192 from.c_str(), to.c_str());
1193 break;
1197 if (*reloc_map == NULL)
1198 *reloc_map = new Reloc_symbol_changes(reloc_count);
1199 (*reloc_map)->set(i, tosym);
1206 // Find all the function in this object defined in section SHNDX.
1207 // Store their offsets in the section in FUNCTION_OFFSETS.
1209 template<int size, bool big_endian>
1210 void
1211 Sized_relobj<size, big_endian>::find_functions(
1212 const unsigned char* pshdrs,
1213 unsigned int shndx,
1214 Sized_relobj<size, big_endian>::Function_offsets* function_offsets)
1216 // We need to read the symbols to find the functions. If we wanted
1217 // to, we could cache reading the symbols across all sections in the
1218 // object.
1219 const unsigned int symtab_shndx = this->symtab_shndx_;
1220 typename This::Shdr symtabshdr(pshdrs + symtab_shndx * This::shdr_size);
1221 gold_assert(symtabshdr.get_sh_type() == elfcpp::SHT_SYMTAB);
1223 typename elfcpp::Elf_types<size>::Elf_WXword sh_size =
1224 symtabshdr.get_sh_size();
1225 const unsigned char* psyms = this->get_view(symtabshdr.get_sh_offset(),
1226 sh_size, true, true);
1228 const int sym_size = This::sym_size;
1229 const unsigned int symcount = sh_size / sym_size;
1230 for (unsigned int i = 0; i < symcount; ++i, psyms += sym_size)
1232 typename elfcpp::Sym<size, big_endian> isym(psyms);
1234 // FIXME: Some targets can have functions which do not have type
1235 // STT_FUNC, e.g., STT_ARM_TFUNC.
1236 if (isym.get_st_type() != elfcpp::STT_FUNC
1237 || isym.get_st_size() == 0)
1238 continue;
1240 bool is_ordinary;
1241 unsigned int sym_shndx = this->adjust_sym_shndx(i, isym.get_st_shndx(),
1242 &is_ordinary);
1243 if (!is_ordinary || sym_shndx != shndx)
1244 continue;
1246 section_offset_type value =
1247 convert_to_section_size_type(isym.get_st_value());
1248 section_size_type fnsize =
1249 convert_to_section_size_type(isym.get_st_size());
1251 (*function_offsets)[value] = fnsize;
1255 // Class Merged_symbol_value.
1257 template<int size>
1258 void
1259 Merged_symbol_value<size>::initialize_input_to_output_map(
1260 const Relobj* object,
1261 unsigned int input_shndx)
1263 Object_merge_map* map = object->merge_map();
1264 map->initialize_input_to_output_map<size>(input_shndx,
1265 this->output_start_address_,
1266 &this->output_addresses_);
1269 // Get the output value corresponding to an input offset if we
1270 // couldn't find it in the hash table.
1272 template<int size>
1273 typename elfcpp::Elf_types<size>::Elf_Addr
1274 Merged_symbol_value<size>::value_from_output_section(
1275 const Relobj* object,
1276 unsigned int input_shndx,
1277 typename elfcpp::Elf_types<size>::Elf_Addr input_offset) const
1279 section_offset_type output_offset;
1280 bool found = object->merge_map()->get_output_offset(NULL, input_shndx,
1281 input_offset,
1282 &output_offset);
1284 // If this assertion fails, it means that some relocation was
1285 // against a portion of an input merge section which we didn't map
1286 // to the output file and we didn't explicitly discard. We should
1287 // always map all portions of input merge sections.
1288 gold_assert(found);
1290 if (output_offset == -1)
1291 return 0;
1292 else
1293 return this->output_start_address_ + output_offset;
1296 // Track_relocs methods.
1298 // Initialize the class to track the relocs. This gets the object,
1299 // the reloc section index, and the type of the relocs. This returns
1300 // false if something goes wrong.
1302 template<int size, bool big_endian>
1303 bool
1304 Track_relocs<size, big_endian>::initialize(
1305 Object* object,
1306 unsigned int reloc_shndx,
1307 unsigned int reloc_type)
1309 // If RELOC_SHNDX is -1U, it means there is more than one reloc
1310 // section for the .eh_frame section. We can't handle that case.
1311 if (reloc_shndx == -1U)
1312 return false;
1314 // If RELOC_SHNDX is 0, there is no reloc section.
1315 if (reloc_shndx == 0)
1316 return true;
1318 // Get the contents of the reloc section.
1319 this->prelocs_ = object->section_contents(reloc_shndx, &this->len_, false);
1321 if (reloc_type == elfcpp::SHT_REL)
1322 this->reloc_size_ = elfcpp::Elf_sizes<size>::rel_size;
1323 else if (reloc_type == elfcpp::SHT_RELA)
1324 this->reloc_size_ = elfcpp::Elf_sizes<size>::rela_size;
1325 else
1326 gold_unreachable();
1328 if (this->len_ % this->reloc_size_ != 0)
1330 object->error(_("reloc section size %zu is not a multiple of "
1331 "reloc size %d\n"),
1332 static_cast<size_t>(this->len_),
1333 this->reloc_size_);
1334 return false;
1337 return true;
1340 // Return the offset of the next reloc, or -1 if there isn't one.
1342 template<int size, bool big_endian>
1343 off_t
1344 Track_relocs<size, big_endian>::next_offset() const
1346 if (this->pos_ >= this->len_)
1347 return -1;
1349 // Rel and Rela start out the same, so we can always use Rel to find
1350 // the r_offset value.
1351 elfcpp::Rel<size, big_endian> rel(this->prelocs_ + this->pos_);
1352 return rel.get_r_offset();
1355 // Return the index of the symbol referenced by the next reloc, or -1U
1356 // if there aren't any more relocs.
1358 template<int size, bool big_endian>
1359 unsigned int
1360 Track_relocs<size, big_endian>::next_symndx() const
1362 if (this->pos_ >= this->len_)
1363 return -1U;
1365 // Rel and Rela start out the same, so we can use Rel to find the
1366 // symbol index.
1367 elfcpp::Rel<size, big_endian> rel(this->prelocs_ + this->pos_);
1368 return elfcpp::elf_r_sym<size>(rel.get_r_info());
1371 // Advance to the next reloc whose r_offset is greater than or equal
1372 // to OFFSET. Return the number of relocs we skip.
1374 template<int size, bool big_endian>
1376 Track_relocs<size, big_endian>::advance(off_t offset)
1378 int ret = 0;
1379 while (this->pos_ < this->len_)
1381 // Rel and Rela start out the same, so we can always use Rel to
1382 // find the r_offset value.
1383 elfcpp::Rel<size, big_endian> rel(this->prelocs_ + this->pos_);
1384 if (static_cast<off_t>(rel.get_r_offset()) >= offset)
1385 break;
1386 ++ret;
1387 this->pos_ += this->reloc_size_;
1389 return ret;
1392 // Instantiate the templates we need.
1394 #ifdef HAVE_TARGET_32_LITTLE
1395 template
1396 void
1397 Sized_relobj<32, false>::do_read_relocs(Read_relocs_data* rd);
1398 #endif
1400 #ifdef HAVE_TARGET_32_BIG
1401 template
1402 void
1403 Sized_relobj<32, true>::do_read_relocs(Read_relocs_data* rd);
1404 #endif
1406 #ifdef HAVE_TARGET_64_LITTLE
1407 template
1408 void
1409 Sized_relobj<64, false>::do_read_relocs(Read_relocs_data* rd);
1410 #endif
1412 #ifdef HAVE_TARGET_64_BIG
1413 template
1414 void
1415 Sized_relobj<64, true>::do_read_relocs(Read_relocs_data* rd);
1416 #endif
1418 #ifdef HAVE_TARGET_32_LITTLE
1419 template
1420 void
1421 Sized_relobj<32, false>::do_gc_process_relocs(Symbol_table* symtab,
1422 Layout* layout,
1423 Read_relocs_data* rd);
1424 #endif
1426 #ifdef HAVE_TARGET_32_BIG
1427 template
1428 void
1429 Sized_relobj<32, true>::do_gc_process_relocs(Symbol_table* symtab,
1430 Layout* layout,
1431 Read_relocs_data* rd);
1432 #endif
1434 #ifdef HAVE_TARGET_64_LITTLE
1435 template
1436 void
1437 Sized_relobj<64, false>::do_gc_process_relocs(Symbol_table* symtab,
1438 Layout* layout,
1439 Read_relocs_data* rd);
1440 #endif
1442 #ifdef HAVE_TARGET_64_BIG
1443 template
1444 void
1445 Sized_relobj<64, true>::do_gc_process_relocs(Symbol_table* symtab,
1446 Layout* layout,
1447 Read_relocs_data* rd);
1448 #endif
1450 #ifdef HAVE_TARGET_32_LITTLE
1451 template
1452 void
1453 Sized_relobj<32, false>::do_scan_relocs(Symbol_table* symtab,
1454 Layout* layout,
1455 Read_relocs_data* rd);
1456 #endif
1458 #ifdef HAVE_TARGET_32_BIG
1459 template
1460 void
1461 Sized_relobj<32, true>::do_scan_relocs(Symbol_table* symtab,
1462 Layout* layout,
1463 Read_relocs_data* rd);
1464 #endif
1466 #ifdef HAVE_TARGET_64_LITTLE
1467 template
1468 void
1469 Sized_relobj<64, false>::do_scan_relocs(Symbol_table* symtab,
1470 Layout* layout,
1471 Read_relocs_data* rd);
1472 #endif
1474 #ifdef HAVE_TARGET_64_BIG
1475 template
1476 void
1477 Sized_relobj<64, true>::do_scan_relocs(Symbol_table* symtab,
1478 Layout* layout,
1479 Read_relocs_data* rd);
1480 #endif
1482 #ifdef HAVE_TARGET_32_LITTLE
1483 template
1484 void
1485 Sized_relobj<32, false>::do_relocate(const Symbol_table* symtab,
1486 const Layout* layout,
1487 Output_file* of);
1488 #endif
1490 #ifdef HAVE_TARGET_32_BIG
1491 template
1492 void
1493 Sized_relobj<32, true>::do_relocate(const Symbol_table* symtab,
1494 const Layout* layout,
1495 Output_file* of);
1496 #endif
1498 #ifdef HAVE_TARGET_64_LITTLE
1499 template
1500 void
1501 Sized_relobj<64, false>::do_relocate(const Symbol_table* symtab,
1502 const Layout* layout,
1503 Output_file* of);
1504 #endif
1506 #ifdef HAVE_TARGET_64_BIG
1507 template
1508 void
1509 Sized_relobj<64, true>::do_relocate(const Symbol_table* symtab,
1510 const Layout* layout,
1511 Output_file* of);
1512 #endif
1514 #ifdef HAVE_TARGET_32_LITTLE
1515 template
1516 void
1517 Sized_relobj<32, false>::do_relocate_sections(
1518 const Symbol_table* symtab,
1519 const Layout* layout,
1520 const unsigned char* pshdrs,
1521 Views* pviews);
1522 #endif
1524 #ifdef HAVE_TARGET_32_BIG
1525 template
1526 void
1527 Sized_relobj<32, true>::do_relocate_sections(
1528 const Symbol_table* symtab,
1529 const Layout* layout,
1530 const unsigned char* pshdrs,
1531 Views* pviews);
1532 #endif
1534 #ifdef HAVE_TARGET_64_LITTLE
1535 template
1536 void
1537 Sized_relobj<64, false>::do_relocate_sections(
1538 const Symbol_table* symtab,
1539 const Layout* layout,
1540 const unsigned char* pshdrs,
1541 Views* pviews);
1542 #endif
1544 #ifdef HAVE_TARGET_64_BIG
1545 template
1546 void
1547 Sized_relobj<64, true>::do_relocate_sections(
1548 const Symbol_table* symtab,
1549 const Layout* layout,
1550 const unsigned char* pshdrs,
1551 Views* pviews);
1552 #endif
1554 #ifdef HAVE_TARGET_32_LITTLE
1555 template
1556 void
1557 Sized_relobj<32, false>::initialize_input_to_output_maps();
1559 template
1560 void
1561 Sized_relobj<32, false>::free_input_to_output_maps();
1562 #endif
1564 #ifdef HAVE_TARGET_32_BIG
1565 template
1566 void
1567 Sized_relobj<32, true>::initialize_input_to_output_maps();
1569 template
1570 void
1571 Sized_relobj<32, true>::free_input_to_output_maps();
1572 #endif
1574 #ifdef HAVE_TARGET_64_LITTLE
1575 template
1576 void
1577 Sized_relobj<64, false>::initialize_input_to_output_maps();
1579 template
1580 void
1581 Sized_relobj<64, false>::free_input_to_output_maps();
1582 #endif
1584 #ifdef HAVE_TARGET_64_BIG
1585 template
1586 void
1587 Sized_relobj<64, true>::initialize_input_to_output_maps();
1589 template
1590 void
1591 Sized_relobj<64, true>::free_input_to_output_maps();
1592 #endif
1594 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
1595 template
1596 class Merged_symbol_value<32>;
1597 #endif
1599 #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
1600 template
1601 class Merged_symbol_value<64>;
1602 #endif
1604 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
1605 template
1606 class Symbol_value<32>;
1607 #endif
1609 #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
1610 template
1611 class Symbol_value<64>;
1612 #endif
1614 #ifdef HAVE_TARGET_32_LITTLE
1615 template
1616 class Track_relocs<32, false>;
1617 #endif
1619 #ifdef HAVE_TARGET_32_BIG
1620 template
1621 class Track_relocs<32, true>;
1622 #endif
1624 #ifdef HAVE_TARGET_64_LITTLE
1625 template
1626 class Track_relocs<64, false>;
1627 #endif
1629 #ifdef HAVE_TARGET_64_BIG
1630 template
1631 class Track_relocs<64, true>;
1632 #endif
1634 } // End namespace gold.