2009-10-25 Doug Kwan <dougkwan@google.com>
[external/binutils.git] / gold / reloc.cc
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
36 namespace 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
45 Task_token*
46 Read_relocs::is_runnable()
47 {
48   return this->object_->is_locked() ? this->object_->token() : NULL;
49 }
50
51 // Lock the file.
52
53 void
54 Read_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
61 void
62 Read_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
93 std::string
94 Read_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
105 Task_token*
106 Gc_process_relocs::is_runnable()
107 {
108   if (this->object_->is_locked())
109     return this->object_->token();
110   return NULL;
111 }
112
113 void
114 Gc_process_relocs::locks(Task_locker* tl)
115 {
116   tl->add(this, this->object_->token());
117   tl->add(this, this->blocker_);
118 }
119
120 void
121 Gc_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
130 std::string
131 Gc_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
143 Task_token*
144 Scan_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
156 void
157 Scan_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
166 void
167 Scan_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
178 std::string
179 Scan_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
188 Task_token*
189 Relocate_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
205 void
206 Relocate_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
216 void
217 Relocate_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
231 std::string
232 Relocate_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
240 template<int size, bool big_endian>
241 void
242 Sized_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
361 template<int size, bool big_endian>
362 void
363 Sized_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
402 template<int size, bool big_endian>
403 void
404 Sized_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
475 template<int sh_type>
476 class 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
510 template<int size, bool big_endian>
511 void
512 Sized_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
538 template<int size, bool big_endian>
539 template<int sh_type>
540 void
541 Sized_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
567 template<int size, bool big_endian>
568 void
569 Sized_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.
629 struct 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
641 template<int size, bool big_endian>
642 void
643 Sized_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
800 template<int size, bool big_endian>
801 void
802 Sized_relobj<size, big_endian>::do_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
934 template<int size, bool big_endian>
935 void
936 Sized_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
970 template<int size, bool big_endian>
971 template<int sh_type>
972 void
973 Sized_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
1004 template<int size, bool big_endian>
1005 void
1006 Sized_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
1018 template<int size, bool big_endian>
1019 void
1020 Sized_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
1036 template<int size, bool big_endian>
1037 void
1038 Sized_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
1067 template<int size, bool big_endian>
1068 template<int sh_type>
1069 void
1070 Sized_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
1222 template<int size, bool big_endian>
1223 void
1224 Sized_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
1270 template<int size>
1271 void
1272 Merged_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
1285 template<int size>
1286 typename elfcpp::Elf_types<size>::Elf_Addr
1287 Merged_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
1315 template<int size, bool big_endian>
1316 bool
1317 Track_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
1355 template<int size, bool big_endian>
1356 off_t
1357 Track_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
1371 template<int size, bool big_endian>
1372 unsigned int
1373 Track_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
1387 template<int size, bool big_endian>
1388 int
1389 Track_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
1408 template
1409 void
1410 Sized_relobj<32, false>::do_read_relocs(Read_relocs_data* rd);
1411 #endif
1412
1413 #ifdef HAVE_TARGET_32_BIG
1414 template
1415 void
1416 Sized_relobj<32, true>::do_read_relocs(Read_relocs_data* rd);
1417 #endif
1418
1419 #ifdef HAVE_TARGET_64_LITTLE
1420 template
1421 void
1422 Sized_relobj<64, false>::do_read_relocs(Read_relocs_data* rd);
1423 #endif
1424
1425 #ifdef HAVE_TARGET_64_BIG
1426 template
1427 void
1428 Sized_relobj<64, true>::do_read_relocs(Read_relocs_data* rd);
1429 #endif
1430
1431 #ifdef HAVE_TARGET_32_LITTLE
1432 template
1433 void
1434 Sized_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
1441 template
1442 void
1443 Sized_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
1450 template
1451 void
1452 Sized_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
1459 template
1460 void
1461 Sized_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
1468 template
1469 void
1470 Sized_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
1477 template
1478 void
1479 Sized_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
1486 template
1487 void
1488 Sized_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
1495 template
1496 void
1497 Sized_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
1504 template
1505 void
1506 Sized_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
1513 template
1514 void
1515 Sized_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
1522 template
1523 void
1524 Sized_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
1531 template
1532 void
1533 Sized_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 #ifdef HAVE_TARGET_32_LITTLE
1540 template
1541 void
1542 Sized_relobj<32, false>::do_relocate_sections(
1543     const General_options& options,
1544     const Symbol_table* symtab,
1545     const Layout* layout,
1546     const unsigned char* pshdrs,
1547     Views* pviews);
1548 #endif
1549
1550 #ifdef HAVE_TARGET_32_BIG
1551 template
1552 void
1553 Sized_relobj<32, true>::do_relocate_sections(
1554     const General_options& options,
1555     const Symbol_table* symtab,
1556     const Layout* layout,
1557     const unsigned char* pshdrs,
1558     Views* pviews);
1559 #endif
1560
1561 #ifdef HAVE_TARGET_64_LITTLE
1562 template
1563 void
1564 Sized_relobj<64, false>::do_relocate_sections(
1565     const General_options& options,
1566     const Symbol_table* symtab,
1567     const Layout* layout,
1568     const unsigned char* pshdrs,
1569     Views* pviews);
1570 #endif
1571
1572 #ifdef HAVE_TARGET_64_BIG
1573 template
1574 void
1575 Sized_relobj<64, true>::do_relocate_sections(
1576     const General_options& options,
1577     const Symbol_table* symtab,
1578     const Layout* layout,
1579     const unsigned char* pshdrs,
1580     Views* pviews);
1581 #endif
1582
1583 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
1584 template
1585 class Merged_symbol_value<32>;
1586 #endif
1587
1588 #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
1589 template
1590 class Merged_symbol_value<64>;
1591 #endif
1592
1593 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
1594 template
1595 class Symbol_value<32>;
1596 #endif
1597
1598 #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
1599 template
1600 class Symbol_value<64>;
1601 #endif
1602
1603 #ifdef HAVE_TARGET_32_LITTLE
1604 template
1605 class Track_relocs<32, false>;
1606 #endif
1607
1608 #ifdef HAVE_TARGET_32_BIG
1609 template
1610 class Track_relocs<32, true>;
1611 #endif
1612
1613 #ifdef HAVE_TARGET_64_LITTLE
1614 template
1615 class Track_relocs<64, false>;
1616 #endif
1617
1618 #ifdef HAVE_TARGET_64_BIG
1619 template
1620 class Track_relocs<64, true>;
1621 #endif
1622
1623 } // End namespace gold.