Merge branch 'vendor/BZIP'
[dragonfly.git] / contrib / binutils-2.20 / gold / reloc.cc
CommitLineData
8e158dd0
SS
1// reloc.cc -- relocate input files for gold.
2
3// Copyright 2006, 2007, 2008, 2009 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 "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"
35
36namespace gold
37{
38
39// Read_relocs methods.
40
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.
44
45Task_token*
46Read_relocs::is_runnable()
47{
48 return this->object_->is_locked() ? this->object_->token() : NULL;
49}
50
51// Lock the file.
52
53void
54Read_relocs::locks(Task_locker* tl)
55{
56 tl->add(this, this->object_->token());
57}
58
59// Read the relocations and then start a Scan_relocs_task.
60
61void
62Read_relocs::run(Workqueue* workqueue)
63{
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();
68
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())
74 {
75 workqueue->queue_next(new Gc_process_relocs(this->options_,
76 this->symtab_,
77 this->layout_,
78 this->object_, rd,
79 this->symtab_lock_,
80 this->blocker_));
81 }
82 else
83 {
84 workqueue->queue_next(new Scan_relocs(this->options_, this->symtab_,
85 this->layout_, this->object_, rd,
86 this->symtab_lock_,
87 this->blocker_));
88 }
89}
90
91// Return a debugging name for the task.
92
93std::string
94Read_relocs::get_name() const
95{
96 return "Read_relocs " + this->object_->name();
97}
98
99// Gc_process_relocs methods.
100
101// These tasks process the relocations read by Read_relocs and
102// determine which sections are referenced and which are garbage.
103// This task is done only when --gc-sections is used.
104
105Task_token*
106Gc_process_relocs::is_runnable()
107{
108 if (this->object_->is_locked())
109 return this->object_->token();
110 return NULL;
111}
112
113void
114Gc_process_relocs::locks(Task_locker* tl)
115{
116 tl->add(this, this->object_->token());
117 tl->add(this, this->blocker_);
118}
119
120void
121Gc_process_relocs::run(Workqueue*)
122{
123 this->object_->gc_process_relocs(this->options_, this->symtab_, this->layout_,
124 this->rd_);
125 this->object_->release();
126}
127
128// Return a debugging name for the task.
129
130std::string
131Gc_process_relocs::get_name() const
132{
133 return "Gc_process_relocs " + this->object_->name();
134}
135
136// Scan_relocs methods.
137
138// These tasks scan the relocations read by Read_relocs and mark up
139// the symbol table to indicate which relocations are required. We
140// use a lock on the symbol table to keep them from interfering with
141// each other.
142
143Task_token*
144Scan_relocs::is_runnable()
145{
146 if (!this->symtab_lock_->is_writable())
147 return this->symtab_lock_;
148 if (this->object_->is_locked())
149 return this->object_->token();
150 return NULL;
151}
152
153// Return the locks we hold: one on the file, one on the symbol table
154// and one blocker.
155
156void
157Scan_relocs::locks(Task_locker* tl)
158{
159 tl->add(this, this->object_->token());
160 tl->add(this, this->symtab_lock_);
161 tl->add(this, this->blocker_);
162}
163
164// Scan the relocs.
165
166void
167Scan_relocs::run(Workqueue*)
168{
169 this->object_->scan_relocs(this->options_, this->symtab_, this->layout_,
170 this->rd_);
171 this->object_->release();
172 delete this->rd_;
173 this->rd_ = NULL;
174}
175
176// Return a debugging name for the task.
177
178std::string
179Scan_relocs::get_name() const
180{
181 return "Scan_relocs " + this->object_->name();
182}
183
184// Relocate_task methods.
185
186// We may have to wait for the output sections to be written.
187
188Task_token*
189Relocate_task::is_runnable()
190{
191 if (this->object_->relocs_must_follow_section_writes()
192 && this->output_sections_blocker_->is_blocked())
193 return this->output_sections_blocker_;
194
195 if (this->object_->is_locked())
196 return this->object_->token();
197
198 return NULL;
199}
200
201// We want to lock the file while we run. We want to unblock
202// INPUT_SECTIONS_BLOCKER and FINAL_BLOCKER when we are done.
203// INPUT_SECTIONS_BLOCKER may be NULL.
204
205void
206Relocate_task::locks(Task_locker* tl)
207{
208 if (this->input_sections_blocker_ != NULL)
209 tl->add(this, this->input_sections_blocker_);
210 tl->add(this, this->final_blocker_);
211 tl->add(this, this->object_->token());
212}
213
214// Run the task.
215
216void
217Relocate_task::run(Workqueue*)
218{
219 this->object_->relocate(this->options_, this->symtab_, this->layout_,
220 this->of_);
221
222 // This is normally the last thing we will do with an object, so
223 // uncache all views.
224 this->object_->clear_view_cache_marks();
225
226 this->object_->release();
227}
228
229// Return a debugging name for the task.
230
231std::string
232Relocate_task::get_name() const
233{
234 return "Relocate_task " + this->object_->name();
235}
236
237// Read the relocs and local symbols from the object file and store
238// the information in RD.
239
240template<int size, bool big_endian>
241void
242Sized_relobj<size, big_endian>::do_read_relocs(Read_relocs_data* rd)
243{
244 rd->relocs.clear();
245
246 unsigned int shnum = this->shnum();
247 if (shnum == 0)
248 return;
249
250 rd->relocs.reserve(shnum / 2);
251
252 const Output_sections& out_sections(this->output_sections());
253 const std::vector<Address>& out_offsets(this->section_offsets_);
254
255 const unsigned char *pshdrs = this->get_view(this->elf_file_.shoff(),
256 shnum * This::shdr_size,
257 true, true);
258 // Skip the first, dummy, section.
259 const unsigned char *ps = pshdrs + This::shdr_size;
260 for (unsigned int i = 1; i < shnum; ++i, ps += This::shdr_size)
261 {
262 typename This::Shdr shdr(ps);
263
264 unsigned int sh_type = shdr.get_sh_type();
265 if (sh_type != elfcpp::SHT_REL && sh_type != elfcpp::SHT_RELA)
266 continue;
267
268 unsigned int shndx = this->adjust_shndx(shdr.get_sh_info());
269 if (shndx >= shnum)
270 {
271 this->error(_("relocation section %u has bad info %u"),
272 i, shndx);
273 continue;
274 }
275
276 Output_section* os = out_sections[shndx];
277 if (os == NULL)
278 continue;
279
280 // We are scanning relocations in order to fill out the GOT and
281 // PLT sections. Relocations for sections which are not
282 // allocated (typically debugging sections) should not add new
283 // GOT and PLT entries. So we skip them unless this is a
284 // relocatable link or we need to emit relocations. FIXME: What
285 // should we do if a linker script maps a section with SHF_ALLOC
286 // clear to a section with SHF_ALLOC set?
287 typename This::Shdr secshdr(pshdrs + shndx * This::shdr_size);
288 bool is_section_allocated = ((secshdr.get_sh_flags() & elfcpp::SHF_ALLOC)
289 != 0);
290 if (!is_section_allocated
291 && !parameters->options().relocatable()
292 && !parameters->options().emit_relocs())
293 continue;
294
295 if (this->adjust_shndx(shdr.get_sh_link()) != this->symtab_shndx_)
296 {
297 this->error(_("relocation section %u uses unexpected "
298 "symbol table %u"),
299 i, this->adjust_shndx(shdr.get_sh_link()));
300 continue;
301 }
302
303 off_t sh_size = shdr.get_sh_size();
304
305 unsigned int reloc_size;
306 if (sh_type == elfcpp::SHT_REL)
307 reloc_size = elfcpp::Elf_sizes<size>::rel_size;
308 else
309 reloc_size = elfcpp::Elf_sizes<size>::rela_size;
310 if (reloc_size != shdr.get_sh_entsize())
311 {
312 this->error(_("unexpected entsize for reloc section %u: %lu != %u"),
313 i, static_cast<unsigned long>(shdr.get_sh_entsize()),
314 reloc_size);
315 continue;
316 }
317
318 size_t reloc_count = sh_size / reloc_size;
319 if (static_cast<off_t>(reloc_count * reloc_size) != sh_size)
320 {
321 this->error(_("reloc section %u size %lu uneven"),
322 i, static_cast<unsigned long>(sh_size));
323 continue;
324 }
325
326 rd->relocs.push_back(Section_relocs());
327 Section_relocs& sr(rd->relocs.back());
328 sr.reloc_shndx = i;
329 sr.data_shndx = shndx;
330 sr.contents = this->get_lasting_view(shdr.get_sh_offset(), sh_size,
331 true, true);
332 sr.sh_type = sh_type;
333 sr.reloc_count = reloc_count;
334 sr.output_section = os;
335 sr.needs_special_offset_handling = out_offsets[shndx] == invalid_address;
336 sr.is_data_section_allocated = is_section_allocated;
337 }
338
339 // Read the local symbols.
340 gold_assert(this->symtab_shndx_ != -1U);
341 if (this->symtab_shndx_ == 0 || this->local_symbol_count_ == 0)
342 rd->local_symbols = NULL;
343 else
344 {
345 typename This::Shdr symtabshdr(pshdrs
346 + this->symtab_shndx_ * This::shdr_size);
347 gold_assert(symtabshdr.get_sh_type() == elfcpp::SHT_SYMTAB);
348 const int sym_size = This::sym_size;
349 const unsigned int loccount = this->local_symbol_count_;
350 gold_assert(loccount == symtabshdr.get_sh_info());
351 off_t locsize = loccount * sym_size;
352 rd->local_symbols = this->get_lasting_view(symtabshdr.get_sh_offset(),
353 locsize, true, true);
354 }
355}
356
357// Process the relocs to generate mappings from source sections to referenced
358// sections. This is used during garbage colletion to determine garbage
359// sections.
360
361template<int size, bool big_endian>
362void
363Sized_relobj<size, big_endian>::do_gc_process_relocs(const General_options& options,
364 Symbol_table* symtab,
365 Layout* layout,
366 Read_relocs_data* rd)
367{
368 Sized_target<size, big_endian>* target =
369 parameters->sized_target<size, big_endian>();
370
371 const unsigned char* local_symbols;
372 if (rd->local_symbols == NULL)
373 local_symbols = NULL;
374 else
375 local_symbols = rd->local_symbols->data();
376
377 for (Read_relocs_data::Relocs_list::iterator p = rd->relocs.begin();
378 p != rd->relocs.end();
379 ++p)
380 {
381 if (!parameters->options().relocatable())
382 {
383 // As noted above, when not generating an object file, we
384 // only scan allocated sections. We may see a non-allocated
385 // section here if we are emitting relocs.
386 if (p->is_data_section_allocated)
387 target->gc_process_relocs(options, symtab, layout, this,
388 p->data_shndx, p->sh_type,
389 p->contents->data(), p->reloc_count,
390 p->output_section,
391 p->needs_special_offset_handling,
392 this->local_symbol_count_,
393 local_symbols);
394 }
395 }
396}
397
398
399// Scan the relocs and adjust the symbol table. This looks for
400// relocations which require GOT/PLT/COPY relocations.
401
402template<int size, bool big_endian>
403void
404Sized_relobj<size, big_endian>::do_scan_relocs(const General_options& options,
405 Symbol_table* symtab,
406 Layout* layout,
407 Read_relocs_data* rd)
408{
409 Sized_target<size, big_endian>* target =
410 parameters->sized_target<size, big_endian>();
411
412 const unsigned char* local_symbols;
413 if (rd->local_symbols == NULL)
414 local_symbols = NULL;
415 else
416 local_symbols = rd->local_symbols->data();
417
418 for (Read_relocs_data::Relocs_list::iterator p = rd->relocs.begin();
419 p != rd->relocs.end();
420 ++p)
421 {
422 // When garbage collection is on, unreferenced sections are not included
423 // in the link that would have been included normally. This is known only
424 // after Read_relocs hence this check has to be done again.
425 if (parameters->options().gc_sections()
426 || parameters->options().icf_enabled())
427 {
428 if (p->output_section == NULL)
429 continue;
430 }
431 if (!parameters->options().relocatable())
432 {
433 // As noted above, when not generating an object file, we
434 // only scan allocated sections. We may see a non-allocated
435 // section here if we are emitting relocs.
436 if (p->is_data_section_allocated)
437 target->scan_relocs(options, symtab, layout, this, p->data_shndx,
438 p->sh_type, p->contents->data(),
439 p->reloc_count, p->output_section,
440 p->needs_special_offset_handling,
441 this->local_symbol_count_,
442 local_symbols);
443 if (parameters->options().emit_relocs())
444 this->emit_relocs_scan(options, symtab, layout, local_symbols, p);
445 }
446 else
447 {
448 Relocatable_relocs* rr = this->relocatable_relocs(p->reloc_shndx);
449 gold_assert(rr != NULL);
450 rr->set_reloc_count(p->reloc_count);
451 target->scan_relocatable_relocs(options, symtab, layout, this,
452 p->data_shndx, p->sh_type,
453 p->contents->data(),
454 p->reloc_count,
455 p->output_section,
456 p->needs_special_offset_handling,
457 this->local_symbol_count_,
458 local_symbols,
459 rr);
460 }
461
462 delete p->contents;
463 p->contents = NULL;
464 }
465
466 if (rd->local_symbols != NULL)
467 {
468 delete rd->local_symbols;
469 rd->local_symbols = NULL;
470 }
471}
472
473// This is a strategy class we use when scanning for --emit-relocs.
474
475template<int sh_type>
476class Emit_relocs_strategy
477{
478 public:
479 // A local non-section symbol.
480 inline Relocatable_relocs::Reloc_strategy
481 local_non_section_strategy(unsigned int, Relobj*, unsigned int)
482 { return Relocatable_relocs::RELOC_COPY; }
483
484 // A local section symbol.
485 inline Relocatable_relocs::Reloc_strategy
486 local_section_strategy(unsigned int, Relobj*)
487 {
488 if (sh_type == elfcpp::SHT_RELA)
489 return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA;
490 else
491 {
492 // The addend is stored in the section contents. Since this
493 // is not a relocatable link, we are going to apply the
494 // relocation contents to the section as usual. This means
495 // that we have no way to record the original addend. If the
496 // original addend is not zero, there is basically no way for
497 // the user to handle this correctly. Caveat emptor.
498 return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_0;
499 }
500 }
501
502 // A global symbol.
503 inline Relocatable_relocs::Reloc_strategy
504 global_strategy(unsigned int, Relobj*, unsigned int)
505 { return Relocatable_relocs::RELOC_COPY; }
506};
507
508// Scan the input relocations for --emit-relocs.
509
510template<int size, bool big_endian>
511void
512Sized_relobj<size, big_endian>::emit_relocs_scan(
513 const General_options& options,
514 Symbol_table* symtab,
515 Layout* layout,
516 const unsigned char* plocal_syms,
517 const Read_relocs_data::Relocs_list::iterator& p)
518{
519 Relocatable_relocs* rr = this->relocatable_relocs(p->reloc_shndx);
520 gold_assert(rr != NULL);
521 rr->set_reloc_count(p->reloc_count);
522
523 if (p->sh_type == elfcpp::SHT_REL)
524 this->emit_relocs_scan_reltype<elfcpp::SHT_REL>(options, symtab, layout,
525 plocal_syms, p, rr);
526 else
527 {
528 gold_assert(p->sh_type == elfcpp::SHT_RELA);
529 this->emit_relocs_scan_reltype<elfcpp::SHT_RELA>(options, symtab,
530 layout, plocal_syms, p,
531 rr);
532 }
533}
534
535// Scan the input relocation for --emit-relocs, templatized on the
536// type of the relocation section.
537
538template<int size, bool big_endian>
539template<int sh_type>
540void
541Sized_relobj<size, big_endian>::emit_relocs_scan_reltype(
542 const General_options& options,
543 Symbol_table* symtab,
544 Layout* layout,
545 const unsigned char* plocal_syms,
546 const Read_relocs_data::Relocs_list::iterator& p,
547 Relocatable_relocs* rr)
548{
549 scan_relocatable_relocs<size, big_endian, sh_type,
550 Emit_relocs_strategy<sh_type> >(
551 options,
552 symtab,
553 layout,
554 this,
555 p->data_shndx,
556 p->contents->data(),
557 p->reloc_count,
558 p->output_section,
559 p->needs_special_offset_handling,
560 this->local_symbol_count_,
561 plocal_syms,
562 rr);
563}
564
565// Relocate the input sections and write out the local symbols.
566
567template<int size, bool big_endian>
568void
569Sized_relobj<size, big_endian>::do_relocate(const General_options& options,
570 const Symbol_table* symtab,
571 const Layout* layout,
572 Output_file* of)
573{
574 unsigned int shnum = this->shnum();
575
576 // Read the section headers.
577 const unsigned char* pshdrs = this->get_view(this->elf_file_.shoff(),
578 shnum * This::shdr_size,
579 true, true);
580
581 Views views;
582 views.resize(shnum);
583
584 // Make two passes over the sections. The first one copies the
585 // section data to the output file. The second one applies
586 // relocations.
587
588 this->write_sections(pshdrs, of, &views);
589
590 // To speed up relocations, we set up hash tables for fast lookup of
591 // input offsets to output addresses.
592 this->initialize_input_to_output_maps();
593
594 // Apply relocations.
595
596 this->relocate_sections(options, symtab, layout, pshdrs, &views);
597
598 // After we've done the relocations, we release the hash tables,
599 // since we no longer need them.
600 this->free_input_to_output_maps();
601
602 // Write out the accumulated views.
603 for (unsigned int i = 1; i < shnum; ++i)
604 {
605 if (views[i].view != NULL)
606 {
607 if (!views[i].is_postprocessing_view)
608 {
609 if (views[i].is_input_output_view)
610 of->write_input_output_view(views[i].offset,
611 views[i].view_size,
612 views[i].view);
613 else
614 of->write_output_view(views[i].offset, views[i].view_size,
615 views[i].view);
616 }
617 }
618 }
619
620 // Write out the local symbols.
621 this->write_local_symbols(of, layout->sympool(), layout->dynpool(),
622 layout->symtab_xindex(), layout->dynsym_xindex());
623
624 // We should no longer need the local symbol values.
625 this->clear_local_symbols();
626}
627
628// Sort a Read_multiple vector by file offset.
629struct Read_multiple_compare
630{
631 inline bool
632 operator()(const File_read::Read_multiple_entry& rme1,
633 const File_read::Read_multiple_entry& rme2) const
634 { return rme1.file_offset < rme2.file_offset; }
635};
636
637// Write section data to the output file. PSHDRS points to the
638// section headers. Record the views in *PVIEWS for use when
639// relocating.
640
641template<int size, bool big_endian>
642void
643Sized_relobj<size, big_endian>::write_sections(const unsigned char* pshdrs,
644 Output_file* of,
645 Views* pviews)
646{
647 unsigned int shnum = this->shnum();
648 const Output_sections& out_sections(this->output_sections());
649 const std::vector<Address>& out_offsets(this->section_offsets_);
650
651 File_read::Read_multiple rm;
652 bool is_sorted = true;
653
654 const unsigned char* p = pshdrs + This::shdr_size;
655 for (unsigned int i = 1; i < shnum; ++i, p += This::shdr_size)
656 {
657 View_size* pvs = &(*pviews)[i];
658
659 pvs->view = NULL;
660
661 const Output_section* os = out_sections[i];
662 if (os == NULL)
663 continue;
664 Address output_offset = out_offsets[i];
665
666 typename This::Shdr shdr(p);
667
668 if (shdr.get_sh_type() == elfcpp::SHT_NOBITS)
669 continue;
670
671 if ((parameters->options().relocatable()
672 || parameters->options().emit_relocs())
673 && (shdr.get_sh_type() == elfcpp::SHT_REL
674 || shdr.get_sh_type() == elfcpp::SHT_RELA)
675 && (shdr.get_sh_flags() & elfcpp::SHF_ALLOC) == 0)
676 {
677 // This is a reloc section in a relocatable link or when
678 // emitting relocs. We don't need to read the input file.
679 // The size and file offset are stored in the
680 // Relocatable_relocs structure.
681 Relocatable_relocs* rr = this->relocatable_relocs(i);
682 gold_assert(rr != NULL);
683 Output_data* posd = rr->output_data();
684 gold_assert(posd != NULL);
685
686 pvs->offset = posd->offset();
687 pvs->view_size = posd->data_size();
688 pvs->view = of->get_output_view(pvs->offset, pvs->view_size);
689 pvs->address = posd->address();
690 pvs->is_input_output_view = false;
691 pvs->is_postprocessing_view = false;
692
693 continue;
694 }
695
696 // In the normal case, this input section is simply mapped to
697 // the output section at offset OUTPUT_OFFSET.
698
699 // However, if OUTPUT_OFFSET == INVALID_ADDRESS, then input data is
700 // handled specially--e.g., a .eh_frame section. The relocation
701 // routines need to check for each reloc where it should be
702 // applied. For this case, we need an input/output view for the
703 // entire contents of the section in the output file. We don't
704 // want to copy the contents of the input section to the output
705 // section; the output section contents were already written,
706 // and we waited for them in Relocate_task::is_runnable because
707 // relocs_must_follow_section_writes is set for the object.
708
709 // Regardless of which of the above cases is true, we have to
710 // check requires_postprocessing of the output section. If that
711 // is false, then we work with views of the output file
712 // directly. If it is true, then we work with a separate
713 // buffer, and the output section is responsible for writing the
714 // final data to the output file.
715
716 off_t output_section_offset;
717 Address output_section_size;
718 if (!os->requires_postprocessing())
719 {
720 output_section_offset = os->offset();
721 output_section_size = convert_types<Address, off_t>(os->data_size());
722 }
723 else
724 {
725 output_section_offset = 0;
726 output_section_size =
727 convert_types<Address, off_t>(os->postprocessing_buffer_size());
728 }
729
730 off_t view_start;
731 section_size_type view_size;
732 if (output_offset != invalid_address)
733 {
734 view_start = output_section_offset + output_offset;
735 view_size = convert_to_section_size_type(shdr.get_sh_size());
736 }
737 else
738 {
739 view_start = output_section_offset;
740 view_size = convert_to_section_size_type(output_section_size);
741 }
742
743 if (view_size == 0)
744 continue;
745
746 gold_assert(output_offset == invalid_address
747 || output_offset + view_size <= output_section_size);
748
749 unsigned char* view;
750 if (os->requires_postprocessing())
751 {
752 unsigned char* buffer = os->postprocessing_buffer();
753 view = buffer + view_start;
754 if (output_offset != invalid_address)
755 {
756 off_t sh_offset = shdr.get_sh_offset();
757 if (!rm.empty() && rm.back().file_offset > sh_offset)
758 is_sorted = false;
759 rm.push_back(File_read::Read_multiple_entry(sh_offset,
760 view_size, view));
761 }
762 }
763 else
764 {
765 if (output_offset == invalid_address)
766 view = of->get_input_output_view(view_start, view_size);
767 else
768 {
769 view = of->get_output_view(view_start, view_size);
770 off_t sh_offset = shdr.get_sh_offset();
771 if (!rm.empty() && rm.back().file_offset > sh_offset)
772 is_sorted = false;
773 rm.push_back(File_read::Read_multiple_entry(sh_offset,
774 view_size, view));
775 }
776 }
777
778 pvs->view = view;
779 pvs->address = os->address();
780 if (output_offset != invalid_address)
781 pvs->address += output_offset;
782 pvs->offset = view_start;
783 pvs->view_size = view_size;
784 pvs->is_input_output_view = output_offset == invalid_address;
785 pvs->is_postprocessing_view = os->requires_postprocessing();
786 }
787
788 // Actually read the data.
789 if (!rm.empty())
790 {
791 if (!is_sorted)
792 std::sort(rm.begin(), rm.end(), Read_multiple_compare());
793 this->read_multiple(rm);
794 }
795}
796
797// Relocate section data. VIEWS points to the section data as views
798// in the output file.
799
800template<int size, bool big_endian>
801void
802Sized_relobj<size, big_endian>::relocate_sections(
803 const General_options& options,
804 const Symbol_table* symtab,
805 const Layout* layout,
806 const unsigned char* pshdrs,
807 Views* pviews)
808{
809 unsigned int shnum = this->shnum();
810 Sized_target<size, big_endian>* target =
811 parameters->sized_target<size, big_endian>();
812
813 const Output_sections& out_sections(this->output_sections());
814 const std::vector<Address>& out_offsets(this->section_offsets_);
815
816 Relocate_info<size, big_endian> relinfo;
817 relinfo.options = &options;
818 relinfo.symtab = symtab;
819 relinfo.layout = layout;
820 relinfo.object = this;
821
822 const unsigned char* p = pshdrs + This::shdr_size;
823 for (unsigned int i = 1; i < shnum; ++i, p += This::shdr_size)
824 {
825 typename This::Shdr shdr(p);
826
827 unsigned int sh_type = shdr.get_sh_type();
828 if (sh_type != elfcpp::SHT_REL && sh_type != elfcpp::SHT_RELA)
829 continue;
830
831 off_t sh_size = shdr.get_sh_size();
832 if (sh_size == 0)
833 continue;
834
835 unsigned int index = this->adjust_shndx(shdr.get_sh_info());
836 if (index >= this->shnum())
837 {
838 this->error(_("relocation section %u has bad info %u"),
839 i, index);
840 continue;
841 }
842
843 Output_section* os = out_sections[index];
844 if (os == NULL)
845 {
846 // This relocation section is against a section which we
847 // discarded.
848 continue;
849 }
850 Address output_offset = out_offsets[index];
851
852 gold_assert((*pviews)[index].view != NULL);
853 if (parameters->options().relocatable())
854 gold_assert((*pviews)[i].view != NULL);
855
856 if (this->adjust_shndx(shdr.get_sh_link()) != this->symtab_shndx_)
857 {
858 gold_error(_("relocation section %u uses unexpected "
859 "symbol table %u"),
860 i, this->adjust_shndx(shdr.get_sh_link()));
861 continue;
862 }
863
864 const unsigned char* prelocs = this->get_view(shdr.get_sh_offset(),
865 sh_size, true, false);
866
867 unsigned int reloc_size;
868 if (sh_type == elfcpp::SHT_REL)
869 reloc_size = elfcpp::Elf_sizes<size>::rel_size;
870 else
871 reloc_size = elfcpp::Elf_sizes<size>::rela_size;
872
873 if (reloc_size != shdr.get_sh_entsize())
874 {
875 gold_error(_("unexpected entsize for reloc section %u: %lu != %u"),
876 i, static_cast<unsigned long>(shdr.get_sh_entsize()),
877 reloc_size);
878 continue;
879 }
880
881 size_t reloc_count = sh_size / reloc_size;
882 if (static_cast<off_t>(reloc_count * reloc_size) != sh_size)
883 {
884 gold_error(_("reloc section %u size %lu uneven"),
885 i, static_cast<unsigned long>(sh_size));
886 continue;
887 }
888
889 gold_assert(output_offset != invalid_address
890 || this->relocs_must_follow_section_writes());
891
892 relinfo.reloc_shndx = i;
893 relinfo.reloc_shdr = p;
894 relinfo.data_shndx = index;
895 relinfo.data_shdr = pshdrs + index * This::shdr_size;
896 unsigned char* view = (*pviews)[index].view;
897 Address address = (*pviews)[index].address;
898 section_size_type view_size = (*pviews)[index].view_size;
899
900 Reloc_symbol_changes* reloc_map = NULL;
901 if (this->uses_split_stack() && output_offset != invalid_address)
902 {
903 typename This::Shdr data_shdr(pshdrs + index * This::shdr_size);
904 if ((data_shdr.get_sh_flags() & elfcpp::SHF_EXECINSTR) != 0)
905 this->split_stack_adjust(symtab, pshdrs, sh_type, index,
906 prelocs, reloc_count, view, view_size,
907 &reloc_map);
908 }
909
910 if (!parameters->options().relocatable())
911 {
912 target->relocate_section(&relinfo, sh_type, prelocs, reloc_count, os,
913 output_offset == invalid_address,
914 view, address, view_size, reloc_map);
915 if (parameters->options().emit_relocs())
916 this->emit_relocs(&relinfo, i, sh_type, prelocs, reloc_count,
917 os, output_offset, view, address, view_size,
918 (*pviews)[i].view, (*pviews)[i].view_size);
919 }
920 else
921 {
922 Relocatable_relocs* rr = this->relocatable_relocs(i);
923 target->relocate_for_relocatable(&relinfo, sh_type, prelocs,
924 reloc_count, os, output_offset, rr,
925 view, address, view_size,
926 (*pviews)[i].view,
927 (*pviews)[i].view_size);
928 }
929 }
930}
931
932// Emit the relocs for --emit-relocs.
933
934template<int size, bool big_endian>
935void
936Sized_relobj<size, big_endian>::emit_relocs(
937 const Relocate_info<size, big_endian>* relinfo,
938 unsigned int i,
939 unsigned int sh_type,
940 const unsigned char* prelocs,
941 size_t reloc_count,
942 Output_section* output_section,
943 typename elfcpp::Elf_types<size>::Elf_Addr offset_in_output_section,
944 unsigned char* view,
945 typename elfcpp::Elf_types<size>::Elf_Addr address,
946 section_size_type view_size,
947 unsigned char* reloc_view,
948 section_size_type reloc_view_size)
949{
950 if (sh_type == elfcpp::SHT_REL)
951 this->emit_relocs_reltype<elfcpp::SHT_REL>(relinfo, i, prelocs,
952 reloc_count, output_section,
953 offset_in_output_section,
954 view, address, view_size,
955 reloc_view, reloc_view_size);
956 else
957 {
958 gold_assert(sh_type == elfcpp::SHT_RELA);
959 this->emit_relocs_reltype<elfcpp::SHT_RELA>(relinfo, i, prelocs,
960 reloc_count, output_section,
961 offset_in_output_section,
962 view, address, view_size,
963 reloc_view, reloc_view_size);
964 }
965}
966
967// Emit the relocs for --emit-relocs, templatized on the type of the
968// relocation section.
969
970template<int size, bool big_endian>
971template<int sh_type>
972void
973Sized_relobj<size, big_endian>::emit_relocs_reltype(
974 const Relocate_info<size, big_endian>* relinfo,
975 unsigned int i,
976 const unsigned char* prelocs,
977 size_t reloc_count,
978 Output_section* output_section,
979 typename elfcpp::Elf_types<size>::Elf_Addr offset_in_output_section,
980 unsigned char* view,
981 typename elfcpp::Elf_types<size>::Elf_Addr address,
982 section_size_type view_size,
983 unsigned char* reloc_view,
984 section_size_type reloc_view_size)
985{
986 const Relocatable_relocs* rr = this->relocatable_relocs(i);
987 relocate_for_relocatable<size, big_endian, sh_type>(
988 relinfo,
989 prelocs,
990 reloc_count,
991 output_section,
992 offset_in_output_section,
993 rr,
994 view,
995 address,
996 view_size,
997 reloc_view,
998 reloc_view_size);
999}
1000
1001// Create merge hash tables for the local symbols. These are used to
1002// speed up relocations.
1003
1004template<int size, bool big_endian>
1005void
1006Sized_relobj<size, big_endian>::initialize_input_to_output_maps()
1007{
1008 const unsigned int loccount = this->local_symbol_count_;
1009 for (unsigned int i = 1; i < loccount; ++i)
1010 {
1011 Symbol_value<size>& lv(this->local_values_[i]);
1012 lv.initialize_input_to_output_map(this);
1013 }
1014}
1015
1016// Free merge hash tables for the local symbols.
1017
1018template<int size, bool big_endian>
1019void
1020Sized_relobj<size, big_endian>::free_input_to_output_maps()
1021{
1022 const unsigned int loccount = this->local_symbol_count_;
1023 for (unsigned int i = 1; i < loccount; ++i)
1024 {
1025 Symbol_value<size>& lv(this->local_values_[i]);
1026 lv.free_input_to_output_map();
1027 }
1028}
1029
1030// If an object was compiled with -fsplit-stack, this is called to
1031// check whether any relocations refer to functions defined in objects
1032// which were not compiled with -fsplit-stack. If they were, then we
1033// need to apply some target-specific adjustments to request
1034// additional stack space.
1035
1036template<int size, bool big_endian>
1037void
1038Sized_relobj<size, big_endian>::split_stack_adjust(
1039 const Symbol_table* symtab,
1040 const unsigned char* pshdrs,
1041 unsigned int sh_type,
1042 unsigned int shndx,
1043 const unsigned char* prelocs,
1044 size_t reloc_count,
1045 unsigned char* view,
1046 section_size_type view_size,
1047 Reloc_symbol_changes** reloc_map)
1048{
1049 if (sh_type == elfcpp::SHT_REL)
1050 this->split_stack_adjust_reltype<elfcpp::SHT_REL>(symtab, pshdrs, shndx,
1051 prelocs, reloc_count,
1052 view, view_size,
1053 reloc_map);
1054 else
1055 {
1056 gold_assert(sh_type == elfcpp::SHT_RELA);
1057 this->split_stack_adjust_reltype<elfcpp::SHT_RELA>(symtab, pshdrs, shndx,
1058 prelocs, reloc_count,
1059 view, view_size,
1060 reloc_map);
1061 }
1062}
1063
1064// Adjust for -fsplit-stack, templatized on the type of the relocation
1065// section.
1066
1067template<int size, bool big_endian>
1068template<int sh_type>
1069void
1070Sized_relobj<size, big_endian>::split_stack_adjust_reltype(
1071 const Symbol_table* symtab,
1072 const unsigned char* pshdrs,
1073 unsigned int shndx,
1074 const unsigned char* prelocs,
1075 size_t reloc_count,
1076 unsigned char* view,
1077 section_size_type view_size,
1078 Reloc_symbol_changes** reloc_map)
1079{
1080 typedef typename Reloc_types<sh_type, size, big_endian>::Reloc Reltype;
1081 const int reloc_size = Reloc_types<sh_type, size, big_endian>::reloc_size;
1082
1083 size_t local_count = this->local_symbol_count();
1084
1085 std::vector<section_offset_type> non_split_refs;
1086
1087 const unsigned char* pr = prelocs;
1088 for (size_t i = 0; i < reloc_count; ++i, pr += reloc_size)
1089 {
1090 Reltype reloc(pr);
1091
1092 typename elfcpp::Elf_types<size>::Elf_WXword r_info = reloc.get_r_info();
1093 unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info);
1094 if (r_sym < local_count)
1095 continue;
1096
1097 const Symbol* gsym = this->global_symbol(r_sym);
1098 gold_assert(gsym != NULL);
1099 if (gsym->is_forwarder())
1100 gsym = symtab->resolve_forwards(gsym);
1101
1102 // See if this relocation refers to a function defined in an
1103 // object compiled without -fsplit-stack. Note that we don't
1104 // care about the type of relocation--this means that in some
1105 // cases we will ask for a large stack unnecessarily, but this
1106 // is not fatal. FIXME: Some targets have symbols which are
1107 // functions but are not type STT_FUNC, e.g., STT_ARM_TFUNC.
1108 if (gsym->type() == elfcpp::STT_FUNC
1109 && !gsym->is_undefined()
1110 && gsym->source() == Symbol::FROM_OBJECT
1111 && !gsym->object()->uses_split_stack())
1112 {
1113 section_offset_type offset =
1114 convert_to_section_size_type(reloc.get_r_offset());
1115 non_split_refs.push_back(offset);
1116 }
1117 }
1118
1119 if (non_split_refs.empty())
1120 return;
1121
1122 // At this point, every entry in NON_SPLIT_REFS indicates a
1123 // relocation which refers to a function in an object compiled
1124 // without -fsplit-stack. We now have to convert that list into a
1125 // set of offsets to functions. First, we find all the functions.
1126
1127 Function_offsets function_offsets;
1128 this->find_functions(pshdrs, shndx, &function_offsets);
1129 if (function_offsets.empty())
1130 return;
1131
1132 // Now get a list of the function with references to non split-stack
1133 // code.
1134
1135 Function_offsets calls_non_split;
1136 for (std::vector<section_offset_type>::const_iterator p
1137 = non_split_refs.begin();
1138 p != non_split_refs.end();
1139 ++p)
1140 {
1141 Function_offsets::const_iterator low = function_offsets.lower_bound(*p);
1142 if (low == function_offsets.end())
1143 --low;
1144 else if (low->first == *p)
1145 ;
1146 else if (low == function_offsets.begin())
1147 continue;
1148 else
1149 --low;
1150
1151 calls_non_split.insert(*low);
1152 }
1153 if (calls_non_split.empty())
1154 return;
1155
1156 // Now we have a set of functions to adjust. The adjustments are
1157 // target specific. Besides changing the output section view
1158 // however, it likes, the target may request a relocation change
1159 // from one global symbol name to another.
1160
1161 for (Function_offsets::const_iterator p = calls_non_split.begin();
1162 p != calls_non_split.end();
1163 ++p)
1164 {
1165 std::string from;
1166 std::string to;
1167 parameters->target().calls_non_split(this, shndx, p->first, p->second,
1168 view, view_size, &from, &to);
1169 if (!from.empty())
1170 {
1171 gold_assert(!to.empty());
1172 Symbol* tosym = NULL;
1173
1174 // Find relocations in the relevant function which are for
1175 // FROM.
1176 pr = prelocs;
1177 for (size_t i = 0; i < reloc_count; ++i, pr += reloc_size)
1178 {
1179 Reltype reloc(pr);
1180
1181 typename elfcpp::Elf_types<size>::Elf_WXword r_info =
1182 reloc.get_r_info();
1183 unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info);
1184 if (r_sym < local_count)
1185 continue;
1186
1187 section_offset_type offset =
1188 convert_to_section_size_type(reloc.get_r_offset());
1189 if (offset < p->first
1190 || (offset
1191 >= (p->first
1192 + static_cast<section_offset_type>(p->second))))
1193 continue;
1194
1195 const Symbol* gsym = this->global_symbol(r_sym);
1196 if (from == gsym->name())
1197 {
1198 if (tosym == NULL)
1199 {
1200 tosym = symtab->lookup(to.c_str());
1201 if (tosym == NULL)
1202 {
1203 this->error(_("could not convert call "
1204 "to '%s' to '%s'"),
1205 from.c_str(), to.c_str());
1206 break;
1207 }
1208 }
1209
1210 if (*reloc_map == NULL)
1211 *reloc_map = new Reloc_symbol_changes(reloc_count);
1212 (*reloc_map)->set(i, tosym);
1213 }
1214 }
1215 }
1216 }
1217}
1218
1219// Find all the function in this object defined in section SHNDX.
1220// Store their offsets in the section in FUNCTION_OFFSETS.
1221
1222template<int size, bool big_endian>
1223void
1224Sized_relobj<size, big_endian>::find_functions(
1225 const unsigned char* pshdrs,
1226 unsigned int shndx,
1227 Sized_relobj<size, big_endian>::Function_offsets* function_offsets)
1228{
1229 // We need to read the symbols to find the functions. If we wanted
1230 // to, we could cache reading the symbols across all sections in the
1231 // object.
1232 const unsigned int symtab_shndx = this->symtab_shndx_;
1233 typename This::Shdr symtabshdr(pshdrs + symtab_shndx * This::shdr_size);
1234 gold_assert(symtabshdr.get_sh_type() == elfcpp::SHT_SYMTAB);
1235
1236 typename elfcpp::Elf_types<size>::Elf_WXword sh_size =
1237 symtabshdr.get_sh_size();
1238 const unsigned char* psyms = this->get_view(symtabshdr.get_sh_offset(),
1239 sh_size, true, true);
1240
1241 const int sym_size = This::sym_size;
1242 const unsigned int symcount = sh_size / sym_size;
1243 for (unsigned int i = 0; i < symcount; ++i, psyms += sym_size)
1244 {
1245 typename elfcpp::Sym<size, big_endian> isym(psyms);
1246
1247 // FIXME: Some targets can have functions which do not have type
1248 // STT_FUNC, e.g., STT_ARM_TFUNC.
1249 if (isym.get_st_type() != elfcpp::STT_FUNC
1250 || isym.get_st_size() == 0)
1251 continue;
1252
1253 bool is_ordinary;
1254 unsigned int sym_shndx = this->adjust_sym_shndx(i, isym.get_st_shndx(),
1255 &is_ordinary);
1256 if (!is_ordinary || sym_shndx != shndx)
1257 continue;
1258
1259 section_offset_type value =
1260 convert_to_section_size_type(isym.get_st_value());
1261 section_size_type fnsize =
1262 convert_to_section_size_type(isym.get_st_size());
1263
1264 (*function_offsets)[value] = fnsize;
1265 }
1266}
1267
1268// Class Merged_symbol_value.
1269
1270template<int size>
1271void
1272Merged_symbol_value<size>::initialize_input_to_output_map(
1273 const Relobj* object,
1274 unsigned int input_shndx)
1275{
1276 Object_merge_map* map = object->merge_map();
1277 map->initialize_input_to_output_map<size>(input_shndx,
1278 this->output_start_address_,
1279 &this->output_addresses_);
1280}
1281
1282// Get the output value corresponding to an input offset if we
1283// couldn't find it in the hash table.
1284
1285template<int size>
1286typename elfcpp::Elf_types<size>::Elf_Addr
1287Merged_symbol_value<size>::value_from_output_section(
1288 const Relobj* object,
1289 unsigned int input_shndx,
1290 typename elfcpp::Elf_types<size>::Elf_Addr input_offset) const
1291{
1292 section_offset_type output_offset;
1293 bool found = object->merge_map()->get_output_offset(NULL, input_shndx,
1294 input_offset,
1295 &output_offset);
1296
1297 // If this assertion fails, it means that some relocation was
1298 // against a portion of an input merge section which we didn't map
1299 // to the output file and we didn't explicitly discard. We should
1300 // always map all portions of input merge sections.
1301 gold_assert(found);
1302
1303 if (output_offset == -1)
1304 return 0;
1305 else
1306 return this->output_start_address_ + output_offset;
1307}
1308
1309// Track_relocs methods.
1310
1311// Initialize the class to track the relocs. This gets the object,
1312// the reloc section index, and the type of the relocs. This returns
1313// false if something goes wrong.
1314
1315template<int size, bool big_endian>
1316bool
1317Track_relocs<size, big_endian>::initialize(
1318 Object* object,
1319 unsigned int reloc_shndx,
1320 unsigned int reloc_type)
1321{
1322 // If RELOC_SHNDX is -1U, it means there is more than one reloc
1323 // section for the .eh_frame section. We can't handle that case.
1324 if (reloc_shndx == -1U)
1325 return false;
1326
1327 // If RELOC_SHNDX is 0, there is no reloc section.
1328 if (reloc_shndx == 0)
1329 return true;
1330
1331 // Get the contents of the reloc section.
1332 this->prelocs_ = object->section_contents(reloc_shndx, &this->len_, false);
1333
1334 if (reloc_type == elfcpp::SHT_REL)
1335 this->reloc_size_ = elfcpp::Elf_sizes<size>::rel_size;
1336 else if (reloc_type == elfcpp::SHT_RELA)
1337 this->reloc_size_ = elfcpp::Elf_sizes<size>::rela_size;
1338 else
1339 gold_unreachable();
1340
1341 if (this->len_ % this->reloc_size_ != 0)
1342 {
1343 object->error(_("reloc section size %zu is not a multiple of "
1344 "reloc size %d\n"),
1345 static_cast<size_t>(this->len_),
1346 this->reloc_size_);
1347 return false;
1348 }
1349
1350 return true;
1351}
1352
1353// Return the offset of the next reloc, or -1 if there isn't one.
1354
1355template<int size, bool big_endian>
1356off_t
1357Track_relocs<size, big_endian>::next_offset() const
1358{
1359 if (this->pos_ >= this->len_)
1360 return -1;
1361
1362 // Rel and Rela start out the same, so we can always use Rel to find
1363 // the r_offset value.
1364 elfcpp::Rel<size, big_endian> rel(this->prelocs_ + this->pos_);
1365 return rel.get_r_offset();
1366}
1367
1368// Return the index of the symbol referenced by the next reloc, or -1U
1369// if there aren't any more relocs.
1370
1371template<int size, bool big_endian>
1372unsigned int
1373Track_relocs<size, big_endian>::next_symndx() const
1374{
1375 if (this->pos_ >= this->len_)
1376 return -1U;
1377
1378 // Rel and Rela start out the same, so we can use Rel to find the
1379 // symbol index.
1380 elfcpp::Rel<size, big_endian> rel(this->prelocs_ + this->pos_);
1381 return elfcpp::elf_r_sym<size>(rel.get_r_info());
1382}
1383
1384// Advance to the next reloc whose r_offset is greater than or equal
1385// to OFFSET. Return the number of relocs we skip.
1386
1387template<int size, bool big_endian>
1388int
1389Track_relocs<size, big_endian>::advance(off_t offset)
1390{
1391 int ret = 0;
1392 while (this->pos_ < this->len_)
1393 {
1394 // Rel and Rela start out the same, so we can always use Rel to
1395 // find the r_offset value.
1396 elfcpp::Rel<size, big_endian> rel(this->prelocs_ + this->pos_);
1397 if (static_cast<off_t>(rel.get_r_offset()) >= offset)
1398 break;
1399 ++ret;
1400 this->pos_ += this->reloc_size_;
1401 }
1402 return ret;
1403}
1404
1405// Instantiate the templates we need.
1406
1407#ifdef HAVE_TARGET_32_LITTLE
1408template
1409void
1410Sized_relobj<32, false>::do_read_relocs(Read_relocs_data* rd);
1411#endif
1412
1413#ifdef HAVE_TARGET_32_BIG
1414template
1415void
1416Sized_relobj<32, true>::do_read_relocs(Read_relocs_data* rd);
1417#endif
1418
1419#ifdef HAVE_TARGET_64_LITTLE
1420template
1421void
1422Sized_relobj<64, false>::do_read_relocs(Read_relocs_data* rd);
1423#endif
1424
1425#ifdef HAVE_TARGET_64_BIG
1426template
1427void
1428Sized_relobj<64, true>::do_read_relocs(Read_relocs_data* rd);
1429#endif
1430
1431#ifdef HAVE_TARGET_32_LITTLE
1432template
1433void
1434Sized_relobj<32, false>::do_gc_process_relocs(const General_options& options,
1435 Symbol_table* symtab,
1436 Layout* layout,
1437 Read_relocs_data* rd);
1438#endif
1439
1440#ifdef HAVE_TARGET_32_BIG
1441template
1442void
1443Sized_relobj<32, true>::do_gc_process_relocs(const General_options& options,
1444 Symbol_table* symtab,
1445 Layout* layout,
1446 Read_relocs_data* rd);
1447#endif
1448
1449#ifdef HAVE_TARGET_64_LITTLE
1450template
1451void
1452Sized_relobj<64, false>::do_gc_process_relocs(const General_options& options,
1453 Symbol_table* symtab,
1454 Layout* layout,
1455 Read_relocs_data* rd);
1456#endif
1457
1458#ifdef HAVE_TARGET_64_BIG
1459template
1460void
1461Sized_relobj<64, true>::do_gc_process_relocs(const General_options& options,
1462 Symbol_table* symtab,
1463 Layout* layout,
1464 Read_relocs_data* rd);
1465#endif
1466
1467#ifdef HAVE_TARGET_32_LITTLE
1468template
1469void
1470Sized_relobj<32, false>::do_scan_relocs(const General_options& options,
1471 Symbol_table* symtab,
1472 Layout* layout,
1473 Read_relocs_data* rd);
1474#endif
1475
1476#ifdef HAVE_TARGET_32_BIG
1477template
1478void
1479Sized_relobj<32, true>::do_scan_relocs(const General_options& options,
1480 Symbol_table* symtab,
1481 Layout* layout,
1482 Read_relocs_data* rd);
1483#endif
1484
1485#ifdef HAVE_TARGET_64_LITTLE
1486template
1487void
1488Sized_relobj<64, false>::do_scan_relocs(const General_options& options,
1489 Symbol_table* symtab,
1490 Layout* layout,
1491 Read_relocs_data* rd);
1492#endif
1493
1494#ifdef HAVE_TARGET_64_BIG
1495template
1496void
1497Sized_relobj<64, true>::do_scan_relocs(const General_options& options,
1498 Symbol_table* symtab,
1499 Layout* layout,
1500 Read_relocs_data* rd);
1501#endif
1502
1503#ifdef HAVE_TARGET_32_LITTLE
1504template
1505void
1506Sized_relobj<32, false>::do_relocate(const General_options& options,
1507 const Symbol_table* symtab,
1508 const Layout* layout,
1509 Output_file* of);
1510#endif
1511
1512#ifdef HAVE_TARGET_32_BIG
1513template
1514void
1515Sized_relobj<32, true>::do_relocate(const General_options& options,
1516 const Symbol_table* symtab,
1517 const Layout* layout,
1518 Output_file* of);
1519#endif
1520
1521#ifdef HAVE_TARGET_64_LITTLE
1522template
1523void
1524Sized_relobj<64, false>::do_relocate(const General_options& options,
1525 const Symbol_table* symtab,
1526 const Layout* layout,
1527 Output_file* of);
1528#endif
1529
1530#ifdef HAVE_TARGET_64_BIG
1531template
1532void
1533Sized_relobj<64, true>::do_relocate(const General_options& options,
1534 const Symbol_table* symtab,
1535 const Layout* layout,
1536 Output_file* of);
1537#endif
1538
1539#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
1540template
1541class Merged_symbol_value<32>;
1542#endif
1543
1544#if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
1545template
1546class Merged_symbol_value<64>;
1547#endif
1548
1549#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
1550template
1551class Symbol_value<32>;
1552#endif
1553
1554#if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
1555template
1556class Symbol_value<64>;
1557#endif
1558
1559#ifdef HAVE_TARGET_32_LITTLE
1560template
1561class Track_relocs<32, false>;
1562#endif
1563
1564#ifdef HAVE_TARGET_32_BIG
1565template
1566class Track_relocs<32, true>;
1567#endif
1568
1569#ifdef HAVE_TARGET_64_LITTLE
1570template
1571class Track_relocs<64, false>;
1572#endif
1573
1574#ifdef HAVE_TARGET_64_BIG
1575template
1576class Track_relocs<64, true>;
1577#endif
1578
1579} // End namespace gold.