1 // reloc.cc -- relocate input files for gold.
3 // Copyright 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
4 // Written by Ian Lance Taylor <iant@google.com>.
6 // This file is part of gold.
8 // This program is free software; you can redistribute it and/or modify
9 // it under the terms of the GNU General Public License as published by
10 // the Free Software Foundation; either version 3 of the License, or
11 // (at your option) any later version.
13 // This program is distributed in the hope that it will be useful,
14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 // GNU General Public License for more details.
18 // You should have received a copy of the GNU General Public License
19 // along with this program; if not, write to the Free Software
20 // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 // MA 02110-1301, USA.
27 #include "workqueue.h"
33 #include "target-reloc.h"
36 #include "compressed_output.h"
37 #include "incremental.h"
42 // Read_relocs methods.
44 // These tasks just read the relocation information from the file.
45 // After reading it, the start another task to process the
46 // information. These tasks requires access to the file.
49 Read_relocs::is_runnable()
51 return this->object_
->is_locked() ? this->object_
->token() : NULL
;
57 Read_relocs::locks(Task_locker
* tl
)
59 tl
->add(this, this->object_
->token());
62 // Read the relocations and then start a Scan_relocs_task.
65 Read_relocs::run(Workqueue
* workqueue
)
67 Read_relocs_data
* rd
= new Read_relocs_data
;
68 this->object_
->read_relocs(rd
);
69 this->object_
->set_relocs_data(rd
);
70 this->object_
->release();
72 // If garbage collection or identical comdat folding is desired, we
73 // process the relocs first before scanning them. Scanning of relocs is
74 // done only after garbage or identical sections is identified.
75 if (parameters
->options().gc_sections()
76 || parameters
->options().icf_enabled())
78 workqueue
->queue_next(new Gc_process_relocs(this->symtab_
,
82 this->next_blocker_
));
86 workqueue
->queue_next(new Scan_relocs(this->symtab_
, this->layout_
,
89 this->next_blocker_
));
93 // Return a debugging name for the task.
96 Read_relocs::get_name() const
98 return "Read_relocs " + this->object_
->name();
101 // Gc_process_relocs methods.
103 Gc_process_relocs::~Gc_process_relocs()
105 if (this->this_blocker_
!= NULL
)
106 delete this->this_blocker_
;
109 // These tasks process the relocations read by Read_relocs and
110 // determine which sections are referenced and which are garbage.
111 // This task is done only when --gc-sections is used. This is blocked
112 // by THIS_BLOCKER_. It unblocks NEXT_BLOCKER_.
115 Gc_process_relocs::is_runnable()
117 if (this->this_blocker_
!= NULL
&& this->this_blocker_
->is_blocked())
118 return this->this_blocker_
;
119 if (this->object_
->is_locked())
120 return this->object_
->token();
125 Gc_process_relocs::locks(Task_locker
* tl
)
127 tl
->add(this, this->object_
->token());
128 tl
->add(this, this->next_blocker_
);
132 Gc_process_relocs::run(Workqueue
*)
134 this->object_
->gc_process_relocs(this->symtab_
, this->layout_
, this->rd_
);
135 this->object_
->release();
138 // Return a debugging name for the task.
141 Gc_process_relocs::get_name() const
143 return "Gc_process_relocs " + this->object_
->name();
146 // Scan_relocs methods.
148 Scan_relocs::~Scan_relocs()
150 if (this->this_blocker_
!= NULL
)
151 delete this->this_blocker_
;
154 // These tasks scan the relocations read by Read_relocs and mark up
155 // the symbol table to indicate which relocations are required. We
156 // use a lock on the symbol table to keep them from interfering with
160 Scan_relocs::is_runnable()
162 if (this->this_blocker_
!= NULL
&& this->this_blocker_
->is_blocked())
163 return this->this_blocker_
;
164 if (this->object_
->is_locked())
165 return this->object_
->token();
169 // Return the locks we hold: one on the file, one on the symbol table
173 Scan_relocs::locks(Task_locker
* tl
)
175 tl
->add(this, this->object_
->token());
176 tl
->add(this, this->next_blocker_
);
182 Scan_relocs::run(Workqueue
*)
184 this->object_
->scan_relocs(this->symtab_
, this->layout_
, this->rd_
);
187 this->object_
->release();
190 // Return a debugging name for the task.
193 Scan_relocs::get_name() const
195 return "Scan_relocs " + this->object_
->name();
198 // Relocate_task methods.
200 // We may have to wait for the output sections to be written.
203 Relocate_task::is_runnable()
205 if (this->object_
->relocs_must_follow_section_writes()
206 && this->output_sections_blocker_
->is_blocked())
207 return this->output_sections_blocker_
;
209 if (this->object_
->is_locked())
210 return this->object_
->token();
215 // We want to lock the file while we run. We want to unblock
216 // INPUT_SECTIONS_BLOCKER and FINAL_BLOCKER when we are done.
217 // INPUT_SECTIONS_BLOCKER may be NULL.
220 Relocate_task::locks(Task_locker
* tl
)
222 if (this->input_sections_blocker_
!= NULL
)
223 tl
->add(this, this->input_sections_blocker_
);
224 tl
->add(this, this->final_blocker_
);
225 tl
->add(this, this->object_
->token());
231 Relocate_task::run(Workqueue
*)
233 this->object_
->relocate(this->symtab_
, this->layout_
, this->of_
);
235 // This is normally the last thing we will do with an object, so
236 // uncache all views.
237 this->object_
->clear_view_cache_marks();
239 this->object_
->release();
242 // Return a debugging name for the task.
245 Relocate_task::get_name() const
247 return "Relocate_task " + this->object_
->name();
250 // Read the relocs and local symbols from the object file and store
251 // the information in RD.
253 template<int size
, bool big_endian
>
255 Sized_relobj
<size
, big_endian
>::do_read_relocs(Read_relocs_data
* rd
)
259 unsigned int shnum
= this->shnum();
263 rd
->relocs
.reserve(shnum
/ 2);
265 const Output_sections
& out_sections(this->output_sections());
266 const std::vector
<Address
>& out_offsets(this->section_offsets_
);
268 const unsigned char* pshdrs
= this->get_view(this->elf_file_
.shoff(),
269 shnum
* This::shdr_size
,
271 // Skip the first, dummy, section.
272 const unsigned char* ps
= pshdrs
+ This::shdr_size
;
273 for (unsigned int i
= 1; i
< shnum
; ++i
, ps
+= This::shdr_size
)
275 typename
This::Shdr
shdr(ps
);
277 unsigned int sh_type
= shdr
.get_sh_type();
278 if (sh_type
!= elfcpp::SHT_REL
&& sh_type
!= elfcpp::SHT_RELA
)
281 unsigned int shndx
= this->adjust_shndx(shdr
.get_sh_info());
284 this->error(_("relocation section %u has bad info %u"),
289 Output_section
* os
= out_sections
[shndx
];
293 // We are scanning relocations in order to fill out the GOT and
294 // PLT sections. Relocations for sections which are not
295 // allocated (typically debugging sections) should not add new
296 // GOT and PLT entries. So we skip them unless this is a
297 // relocatable link or we need to emit relocations. FIXME: What
298 // should we do if a linker script maps a section with SHF_ALLOC
299 // clear to a section with SHF_ALLOC set?
300 typename
This::Shdr
secshdr(pshdrs
+ shndx
* This::shdr_size
);
301 bool is_section_allocated
= ((secshdr
.get_sh_flags() & elfcpp::SHF_ALLOC
)
303 if (!is_section_allocated
304 && !parameters
->options().relocatable()
305 && !parameters
->options().emit_relocs()
306 && !parameters
->incremental())
309 if (this->adjust_shndx(shdr
.get_sh_link()) != this->symtab_shndx_
)
311 this->error(_("relocation section %u uses unexpected "
313 i
, this->adjust_shndx(shdr
.get_sh_link()));
317 off_t sh_size
= shdr
.get_sh_size();
319 unsigned int reloc_size
;
320 if (sh_type
== elfcpp::SHT_REL
)
321 reloc_size
= elfcpp::Elf_sizes
<size
>::rel_size
;
323 reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
324 if (reloc_size
!= shdr
.get_sh_entsize())
326 this->error(_("unexpected entsize for reloc section %u: %lu != %u"),
327 i
, static_cast<unsigned long>(shdr
.get_sh_entsize()),
332 size_t reloc_count
= sh_size
/ reloc_size
;
333 if (static_cast<off_t
>(reloc_count
* reloc_size
) != sh_size
)
335 this->error(_("reloc section %u size %lu uneven"),
336 i
, static_cast<unsigned long>(sh_size
));
340 rd
->relocs
.push_back(Section_relocs());
341 Section_relocs
& sr(rd
->relocs
.back());
343 sr
.data_shndx
= shndx
;
344 sr
.contents
= this->get_lasting_view(shdr
.get_sh_offset(), sh_size
,
346 sr
.sh_type
= sh_type
;
347 sr
.reloc_count
= reloc_count
;
348 sr
.output_section
= os
;
349 sr
.needs_special_offset_handling
= out_offsets
[shndx
] == invalid_address
;
350 sr
.is_data_section_allocated
= is_section_allocated
;
353 // Read the local symbols.
354 gold_assert(this->symtab_shndx_
!= -1U);
355 if (this->symtab_shndx_
== 0 || this->local_symbol_count_
== 0)
356 rd
->local_symbols
= NULL
;
359 typename
This::Shdr
symtabshdr(pshdrs
360 + this->symtab_shndx_
* This::shdr_size
);
361 gold_assert(symtabshdr
.get_sh_type() == elfcpp::SHT_SYMTAB
);
362 const int sym_size
= This::sym_size
;
363 const unsigned int loccount
= this->local_symbol_count_
;
364 gold_assert(loccount
== symtabshdr
.get_sh_info());
365 off_t locsize
= loccount
* sym_size
;
366 rd
->local_symbols
= this->get_lasting_view(symtabshdr
.get_sh_offset(),
367 locsize
, true, true);
371 // Process the relocs to generate mappings from source sections to referenced
372 // sections. This is used during garbage collection to determine garbage
375 template<int size
, bool big_endian
>
377 Sized_relobj
<size
, big_endian
>::do_gc_process_relocs(Symbol_table
* symtab
,
379 Read_relocs_data
* rd
)
381 Sized_target
<size
, big_endian
>* target
=
382 parameters
->sized_target
<size
, big_endian
>();
384 const unsigned char* local_symbols
;
385 if (rd
->local_symbols
== NULL
)
386 local_symbols
= NULL
;
388 local_symbols
= rd
->local_symbols
->data();
390 for (Read_relocs_data::Relocs_list::iterator p
= rd
->relocs
.begin();
391 p
!= rd
->relocs
.end();
394 if (!parameters
->options().relocatable())
396 // As noted above, when not generating an object file, we
397 // only scan allocated sections. We may see a non-allocated
398 // section here if we are emitting relocs.
399 if (p
->is_data_section_allocated
)
400 target
->gc_process_relocs(symtab
, layout
, this,
401 p
->data_shndx
, p
->sh_type
,
402 p
->contents
->data(), p
->reloc_count
,
404 p
->needs_special_offset_handling
,
405 this->local_symbol_count_
,
412 // Scan the relocs and adjust the symbol table. This looks for
413 // relocations which require GOT/PLT/COPY relocations.
415 template<int size
, bool big_endian
>
417 Sized_relobj
<size
, big_endian
>::do_scan_relocs(Symbol_table
* symtab
,
419 Read_relocs_data
* rd
)
421 Sized_target
<size
, big_endian
>* target
=
422 parameters
->sized_target
<size
, big_endian
>();
424 const unsigned char* local_symbols
;
425 if (rd
->local_symbols
== NULL
)
426 local_symbols
= NULL
;
428 local_symbols
= rd
->local_symbols
->data();
430 // For incremental links, allocate the counters for incremental relocations.
431 if (layout
->incremental_inputs() != NULL
)
432 this->allocate_incremental_reloc_counts();
434 for (Read_relocs_data::Relocs_list::iterator p
= rd
->relocs
.begin();
435 p
!= rd
->relocs
.end();
438 // When garbage collection is on, unreferenced sections are not included
439 // in the link that would have been included normally. This is known only
440 // after Read_relocs hence this check has to be done again.
441 if (parameters
->options().gc_sections()
442 || parameters
->options().icf_enabled())
444 if (p
->output_section
== NULL
)
447 if (!parameters
->options().relocatable())
449 // As noted above, when not generating an object file, we
450 // only scan allocated sections. We may see a non-allocated
451 // section here if we are emitting relocs.
452 if (p
->is_data_section_allocated
)
453 target
->scan_relocs(symtab
, layout
, this, p
->data_shndx
,
454 p
->sh_type
, p
->contents
->data(),
455 p
->reloc_count
, p
->output_section
,
456 p
->needs_special_offset_handling
,
457 this->local_symbol_count_
,
459 if (parameters
->options().emit_relocs())
460 this->emit_relocs_scan(symtab
, layout
, local_symbols
, p
);
461 if (layout
->incremental_inputs() != NULL
)
462 this->incremental_relocs_scan(p
);
466 Relocatable_relocs
* rr
= this->relocatable_relocs(p
->reloc_shndx
);
467 gold_assert(rr
!= NULL
);
468 rr
->set_reloc_count(p
->reloc_count
);
469 target
->scan_relocatable_relocs(symtab
, layout
, this,
470 p
->data_shndx
, p
->sh_type
,
474 p
->needs_special_offset_handling
,
475 this->local_symbol_count_
,
484 // For incremental links, finalize the allocation of relocations.
485 if (layout
->incremental_inputs() != NULL
)
486 this->finalize_incremental_relocs(layout
);
488 if (rd
->local_symbols
!= NULL
)
490 delete rd
->local_symbols
;
491 rd
->local_symbols
= NULL
;
495 // This is a strategy class we use when scanning for --emit-relocs.
497 template<int sh_type
>
498 class Emit_relocs_strategy
501 // A local non-section symbol.
502 inline Relocatable_relocs::Reloc_strategy
503 local_non_section_strategy(unsigned int, Relobj
*, unsigned int)
504 { return Relocatable_relocs::RELOC_COPY
; }
506 // A local section symbol.
507 inline Relocatable_relocs::Reloc_strategy
508 local_section_strategy(unsigned int, Relobj
*)
510 if (sh_type
== elfcpp::SHT_RELA
)
511 return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
;
514 // The addend is stored in the section contents. Since this
515 // is not a relocatable link, we are going to apply the
516 // relocation contents to the section as usual. This means
517 // that we have no way to record the original addend. If the
518 // original addend is not zero, there is basically no way for
519 // the user to handle this correctly. Caveat emptor.
520 return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_0
;
525 inline Relocatable_relocs::Reloc_strategy
526 global_strategy(unsigned int, Relobj
*, unsigned int)
527 { return Relocatable_relocs::RELOC_COPY
; }
530 // Scan the input relocations for --emit-relocs.
532 template<int size
, bool big_endian
>
534 Sized_relobj
<size
, big_endian
>::emit_relocs_scan(
535 Symbol_table
* symtab
,
537 const unsigned char* plocal_syms
,
538 const Read_relocs_data::Relocs_list::iterator
& p
)
540 Relocatable_relocs
* rr
= this->relocatable_relocs(p
->reloc_shndx
);
541 gold_assert(rr
!= NULL
);
542 rr
->set_reloc_count(p
->reloc_count
);
544 if (p
->sh_type
== elfcpp::SHT_REL
)
545 this->emit_relocs_scan_reltype
<elfcpp::SHT_REL
>(symtab
, layout
,
549 gold_assert(p
->sh_type
== elfcpp::SHT_RELA
);
550 this->emit_relocs_scan_reltype
<elfcpp::SHT_RELA
>(symtab
, layout
,
555 // Scan the input relocation for --emit-relocs, templatized on the
556 // type of the relocation section.
558 template<int size
, bool big_endian
>
559 template<int sh_type
>
561 Sized_relobj
<size
, big_endian
>::emit_relocs_scan_reltype(
562 Symbol_table
* symtab
,
564 const unsigned char* plocal_syms
,
565 const Read_relocs_data::Relocs_list::iterator
& p
,
566 Relocatable_relocs
* rr
)
568 scan_relocatable_relocs
<size
, big_endian
, sh_type
,
569 Emit_relocs_strategy
<sh_type
> >(
577 p
->needs_special_offset_handling
,
578 this->local_symbol_count_
,
583 // Scan the input relocations for --incremental.
585 template<int size
, bool big_endian
>
587 Sized_relobj
<size
, big_endian
>::incremental_relocs_scan(
588 const Read_relocs_data::Relocs_list::iterator
& p
)
590 if (p
->sh_type
== elfcpp::SHT_REL
)
591 this->incremental_relocs_scan_reltype
<elfcpp::SHT_REL
>(p
);
594 gold_assert(p
->sh_type
== elfcpp::SHT_RELA
);
595 this->incremental_relocs_scan_reltype
<elfcpp::SHT_RELA
>(p
);
599 // Scan the input relocation for --emit-relocs, templatized on the
600 // type of the relocation section.
602 template<int size
, bool big_endian
>
603 template<int sh_type
>
605 Sized_relobj
<size
, big_endian
>::incremental_relocs_scan_reltype(
606 const Read_relocs_data::Relocs_list::iterator
& p
)
608 typedef typename Reloc_types
<sh_type
, size
, big_endian
>::Reloc Reltype
;
609 const int reloc_size
= Reloc_types
<sh_type
, size
, big_endian
>::reloc_size
;
610 const unsigned char* prelocs
= p
->contents
->data();
611 size_t reloc_count
= p
->reloc_count
;
613 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
615 Reltype
reloc(prelocs
);
617 if (p
->needs_special_offset_handling
618 && !p
->output_section
->is_input_address_mapped(this, p
->data_shndx
,
619 reloc
.get_r_offset()))
622 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
=
624 const unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
626 if (r_sym
>= this->local_symbol_count_
)
627 this->count_incremental_reloc(r_sym
- this->local_symbol_count_
);
631 // Relocate the input sections and write out the local symbols.
633 template<int size
, bool big_endian
>
635 Sized_relobj
<size
, big_endian
>::do_relocate(const Symbol_table
* symtab
,
636 const Layout
* layout
,
639 unsigned int shnum
= this->shnum();
641 // Read the section headers.
642 const unsigned char* pshdrs
= this->get_view(this->elf_file_
.shoff(),
643 shnum
* This::shdr_size
,
649 // Make two passes over the sections. The first one copies the
650 // section data to the output file. The second one applies
653 this->write_sections(pshdrs
, of
, &views
);
655 // To speed up relocations, we set up hash tables for fast lookup of
656 // input offsets to output addresses.
657 this->initialize_input_to_output_maps();
659 // Apply relocations.
661 this->relocate_sections(symtab
, layout
, pshdrs
, of
, &views
);
663 // After we've done the relocations, we release the hash tables,
664 // since we no longer need them.
665 this->free_input_to_output_maps();
667 // Write out the accumulated views.
668 for (unsigned int i
= 1; i
< shnum
; ++i
)
670 if (views
[i
].view
!= NULL
)
672 if (!views
[i
].is_postprocessing_view
)
674 if (views
[i
].is_input_output_view
)
675 of
->write_input_output_view(views
[i
].offset
,
679 of
->write_output_view(views
[i
].offset
, views
[i
].view_size
,
685 // Write out the local symbols.
686 this->write_local_symbols(of
, layout
->sympool(), layout
->dynpool(),
687 layout
->symtab_xindex(), layout
->dynsym_xindex());
690 // Sort a Read_multiple vector by file offset.
691 struct Read_multiple_compare
694 operator()(const File_read::Read_multiple_entry
& rme1
,
695 const File_read::Read_multiple_entry
& rme2
) const
696 { return rme1
.file_offset
< rme2
.file_offset
; }
699 // Write section data to the output file. PSHDRS points to the
700 // section headers. Record the views in *PVIEWS for use when
703 template<int size
, bool big_endian
>
705 Sized_relobj
<size
, big_endian
>::write_sections(const unsigned char* pshdrs
,
709 unsigned int shnum
= this->shnum();
710 const Output_sections
& out_sections(this->output_sections());
711 const std::vector
<Address
>& out_offsets(this->section_offsets_
);
713 File_read::Read_multiple rm
;
714 bool is_sorted
= true;
716 const unsigned char* p
= pshdrs
+ This::shdr_size
;
717 for (unsigned int i
= 1; i
< shnum
; ++i
, p
+= This::shdr_size
)
719 View_size
* pvs
= &(*pviews
)[i
];
723 const Output_section
* os
= out_sections
[i
];
726 Address output_offset
= out_offsets
[i
];
728 typename
This::Shdr
shdr(p
);
730 if (shdr
.get_sh_type() == elfcpp::SHT_NOBITS
)
733 if ((parameters
->options().relocatable()
734 || parameters
->options().emit_relocs())
735 && (shdr
.get_sh_type() == elfcpp::SHT_REL
736 || shdr
.get_sh_type() == elfcpp::SHT_RELA
)
737 && (shdr
.get_sh_flags() & elfcpp::SHF_ALLOC
) == 0)
739 // This is a reloc section in a relocatable link or when
740 // emitting relocs. We don't need to read the input file.
741 // The size and file offset are stored in the
742 // Relocatable_relocs structure.
743 Relocatable_relocs
* rr
= this->relocatable_relocs(i
);
744 gold_assert(rr
!= NULL
);
745 Output_data
* posd
= rr
->output_data();
746 gold_assert(posd
!= NULL
);
748 pvs
->offset
= posd
->offset();
749 pvs
->view_size
= posd
->data_size();
750 pvs
->view
= of
->get_output_view(pvs
->offset
, pvs
->view_size
);
751 pvs
->address
= posd
->address();
752 pvs
->is_input_output_view
= false;
753 pvs
->is_postprocessing_view
= false;
758 // In the normal case, this input section is simply mapped to
759 // the output section at offset OUTPUT_OFFSET.
761 // However, if OUTPUT_OFFSET == INVALID_ADDRESS, then input data is
762 // handled specially--e.g., a .eh_frame section. The relocation
763 // routines need to check for each reloc where it should be
764 // applied. For this case, we need an input/output view for the
765 // entire contents of the section in the output file. We don't
766 // want to copy the contents of the input section to the output
767 // section; the output section contents were already written,
768 // and we waited for them in Relocate_task::is_runnable because
769 // relocs_must_follow_section_writes is set for the object.
771 // Regardless of which of the above cases is true, we have to
772 // check requires_postprocessing of the output section. If that
773 // is false, then we work with views of the output file
774 // directly. If it is true, then we work with a separate
775 // buffer, and the output section is responsible for writing the
776 // final data to the output file.
778 off_t output_section_offset
;
779 Address output_section_size
;
780 if (!os
->requires_postprocessing())
782 output_section_offset
= os
->offset();
783 output_section_size
= convert_types
<Address
, off_t
>(os
->data_size());
787 output_section_offset
= 0;
788 output_section_size
=
789 convert_types
<Address
, off_t
>(os
->postprocessing_buffer_size());
793 section_size_type view_size
;
794 bool must_decompress
= false;
795 if (output_offset
!= invalid_address
)
797 view_start
= output_section_offset
+ output_offset
;
798 view_size
= convert_to_section_size_type(shdr
.get_sh_size());
799 section_size_type uncompressed_size
;
800 if (this->section_is_compressed(i
, &uncompressed_size
))
802 view_size
= uncompressed_size
;
803 must_decompress
= true;
808 view_start
= output_section_offset
;
809 view_size
= convert_to_section_size_type(output_section_size
);
815 gold_assert(output_offset
== invalid_address
816 || output_offset
+ view_size
<= output_section_size
);
819 if (os
->requires_postprocessing())
821 unsigned char* buffer
= os
->postprocessing_buffer();
822 view
= buffer
+ view_start
;
823 if (output_offset
!= invalid_address
&& !must_decompress
)
825 off_t sh_offset
= shdr
.get_sh_offset();
826 if (!rm
.empty() && rm
.back().file_offset
> sh_offset
)
828 rm
.push_back(File_read::Read_multiple_entry(sh_offset
,
834 if (output_offset
== invalid_address
)
835 view
= of
->get_input_output_view(view_start
, view_size
);
838 view
= of
->get_output_view(view_start
, view_size
);
839 if (!must_decompress
)
841 off_t sh_offset
= shdr
.get_sh_offset();
842 if (!rm
.empty() && rm
.back().file_offset
> sh_offset
)
844 rm
.push_back(File_read::Read_multiple_entry(sh_offset
,
852 // Read and decompress the section.
853 section_size_type len
;
854 const unsigned char* p
= this->section_contents(i
, &len
, false);
855 if (!decompress_input_section(p
, len
, view
, view_size
))
856 this->error(_("could not decompress section %s"),
857 this->section_name(i
).c_str());
861 pvs
->address
= os
->address();
862 if (output_offset
!= invalid_address
)
863 pvs
->address
+= output_offset
;
864 pvs
->offset
= view_start
;
865 pvs
->view_size
= view_size
;
866 pvs
->is_input_output_view
= output_offset
== invalid_address
;
867 pvs
->is_postprocessing_view
= os
->requires_postprocessing();
870 // Actually read the data.
874 std::sort(rm
.begin(), rm
.end(), Read_multiple_compare());
875 this->read_multiple(rm
);
879 // Relocate section data. VIEWS points to the section data as views
880 // in the output file.
882 template<int size
, bool big_endian
>
884 Sized_relobj
<size
, big_endian
>::do_relocate_sections(
885 const Symbol_table
* symtab
,
886 const Layout
* layout
,
887 const unsigned char* pshdrs
,
891 unsigned int shnum
= this->shnum();
892 Sized_target
<size
, big_endian
>* target
=
893 parameters
->sized_target
<size
, big_endian
>();
895 const Output_sections
& out_sections(this->output_sections());
896 const std::vector
<Address
>& out_offsets(this->section_offsets_
);
898 Relocate_info
<size
, big_endian
> relinfo
;
899 relinfo
.symtab
= symtab
;
900 relinfo
.layout
= layout
;
901 relinfo
.object
= this;
903 const unsigned char* p
= pshdrs
+ This::shdr_size
;
904 for (unsigned int i
= 1; i
< shnum
; ++i
, p
+= This::shdr_size
)
906 typename
This::Shdr
shdr(p
);
908 unsigned int sh_type
= shdr
.get_sh_type();
909 if (sh_type
!= elfcpp::SHT_REL
&& sh_type
!= elfcpp::SHT_RELA
)
912 off_t sh_size
= shdr
.get_sh_size();
916 unsigned int index
= this->adjust_shndx(shdr
.get_sh_info());
917 if (index
>= this->shnum())
919 this->error(_("relocation section %u has bad info %u"),
924 Output_section
* os
= out_sections
[index
];
927 // This relocation section is against a section which we
931 Address output_offset
= out_offsets
[index
];
933 gold_assert((*pviews
)[index
].view
!= NULL
);
934 if (parameters
->options().relocatable())
935 gold_assert((*pviews
)[i
].view
!= NULL
);
937 if (this->adjust_shndx(shdr
.get_sh_link()) != this->symtab_shndx_
)
939 gold_error(_("relocation section %u uses unexpected "
941 i
, this->adjust_shndx(shdr
.get_sh_link()));
945 const unsigned char* prelocs
= this->get_view(shdr
.get_sh_offset(),
946 sh_size
, true, false);
948 unsigned int reloc_size
;
949 if (sh_type
== elfcpp::SHT_REL
)
950 reloc_size
= elfcpp::Elf_sizes
<size
>::rel_size
;
952 reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
954 if (reloc_size
!= shdr
.get_sh_entsize())
956 gold_error(_("unexpected entsize for reloc section %u: %lu != %u"),
957 i
, static_cast<unsigned long>(shdr
.get_sh_entsize()),
962 size_t reloc_count
= sh_size
/ reloc_size
;
963 if (static_cast<off_t
>(reloc_count
* reloc_size
) != sh_size
)
965 gold_error(_("reloc section %u size %lu uneven"),
966 i
, static_cast<unsigned long>(sh_size
));
970 gold_assert(output_offset
!= invalid_address
971 || this->relocs_must_follow_section_writes());
973 relinfo
.reloc_shndx
= i
;
974 relinfo
.reloc_shdr
= p
;
975 relinfo
.data_shndx
= index
;
976 relinfo
.data_shdr
= pshdrs
+ index
* This::shdr_size
;
977 unsigned char* view
= (*pviews
)[index
].view
;
978 Address address
= (*pviews
)[index
].address
;
979 section_size_type view_size
= (*pviews
)[index
].view_size
;
981 Reloc_symbol_changes
* reloc_map
= NULL
;
982 if (this->uses_split_stack() && output_offset
!= invalid_address
)
984 typename
This::Shdr
data_shdr(pshdrs
+ index
* This::shdr_size
);
985 if ((data_shdr
.get_sh_flags() & elfcpp::SHF_EXECINSTR
) != 0)
986 this->split_stack_adjust(symtab
, pshdrs
, sh_type
, index
,
987 prelocs
, reloc_count
, view
, view_size
,
991 if (!parameters
->options().relocatable())
993 target
->relocate_section(&relinfo
, sh_type
, prelocs
, reloc_count
, os
,
994 output_offset
== invalid_address
,
995 view
, address
, view_size
, reloc_map
);
996 if (parameters
->options().emit_relocs())
997 this->emit_relocs(&relinfo
, i
, sh_type
, prelocs
, reloc_count
,
998 os
, output_offset
, view
, address
, view_size
,
999 (*pviews
)[i
].view
, (*pviews
)[i
].view_size
);
1000 if (parameters
->incremental())
1001 this->incremental_relocs_write(&relinfo
, sh_type
, prelocs
,
1002 reloc_count
, os
, output_offset
, of
);
1006 Relocatable_relocs
* rr
= this->relocatable_relocs(i
);
1007 target
->relocate_for_relocatable(&relinfo
, sh_type
, prelocs
,
1008 reloc_count
, os
, output_offset
, rr
,
1009 view
, address
, view_size
,
1011 (*pviews
)[i
].view_size
);
1016 // Emit the relocs for --emit-relocs.
1018 template<int size
, bool big_endian
>
1020 Sized_relobj
<size
, big_endian
>::emit_relocs(
1021 const Relocate_info
<size
, big_endian
>* relinfo
,
1023 unsigned int sh_type
,
1024 const unsigned char* prelocs
,
1026 Output_section
* output_section
,
1027 typename
elfcpp::Elf_types
<size
>::Elf_Addr offset_in_output_section
,
1028 unsigned char* view
,
1029 typename
elfcpp::Elf_types
<size
>::Elf_Addr address
,
1030 section_size_type view_size
,
1031 unsigned char* reloc_view
,
1032 section_size_type reloc_view_size
)
1034 if (sh_type
== elfcpp::SHT_REL
)
1035 this->emit_relocs_reltype
<elfcpp::SHT_REL
>(relinfo
, i
, prelocs
,
1036 reloc_count
, output_section
,
1037 offset_in_output_section
,
1038 view
, address
, view_size
,
1039 reloc_view
, reloc_view_size
);
1042 gold_assert(sh_type
== elfcpp::SHT_RELA
);
1043 this->emit_relocs_reltype
<elfcpp::SHT_RELA
>(relinfo
, i
, prelocs
,
1044 reloc_count
, output_section
,
1045 offset_in_output_section
,
1046 view
, address
, view_size
,
1047 reloc_view
, reloc_view_size
);
1051 // Emit the relocs for --emit-relocs, templatized on the type of the
1052 // relocation section.
1054 template<int size
, bool big_endian
>
1055 template<int sh_type
>
1057 Sized_relobj
<size
, big_endian
>::emit_relocs_reltype(
1058 const Relocate_info
<size
, big_endian
>* relinfo
,
1060 const unsigned char* prelocs
,
1062 Output_section
* output_section
,
1063 typename
elfcpp::Elf_types
<size
>::Elf_Addr offset_in_output_section
,
1064 unsigned char* view
,
1065 typename
elfcpp::Elf_types
<size
>::Elf_Addr address
,
1066 section_size_type view_size
,
1067 unsigned char* reloc_view
,
1068 section_size_type reloc_view_size
)
1070 const Relocatable_relocs
* rr
= this->relocatable_relocs(i
);
1071 relocate_for_relocatable
<size
, big_endian
, sh_type
>(
1076 offset_in_output_section
,
1085 // Write the incremental relocs.
1087 template<int size
, bool big_endian
>
1089 Sized_relobj
<size
, big_endian
>::incremental_relocs_write(
1090 const Relocate_info
<size
, big_endian
>* relinfo
,
1091 unsigned int sh_type
,
1092 const unsigned char* prelocs
,
1094 Output_section
* output_section
,
1095 Address output_offset
,
1098 if (sh_type
== elfcpp::SHT_REL
)
1099 this->incremental_relocs_write_reltype
<elfcpp::SHT_REL
>(
1108 gold_assert(sh_type
== elfcpp::SHT_RELA
);
1109 this->incremental_relocs_write_reltype
<elfcpp::SHT_RELA
>(
1119 // Write the incremental relocs, templatized on the type of the
1120 // relocation section.
1122 template<int size
, bool big_endian
>
1123 template<int sh_type
>
1125 Sized_relobj
<size
, big_endian
>::incremental_relocs_write_reltype(
1126 const Relocate_info
<size
, big_endian
>* relinfo
,
1127 const unsigned char* prelocs
,
1129 Output_section
* output_section
,
1130 Address output_offset
,
1133 typedef typename Reloc_types
<sh_type
, size
, big_endian
>::Reloc Reloc
;
1134 const unsigned int reloc_size
=
1135 Reloc_types
<sh_type
, size
, big_endian
>::reloc_size
;
1136 const unsigned int sizeof_addr
= size
/ 8;
1137 const unsigned int incr_reloc_size
= 8 + 2 * sizeof_addr
;
1139 unsigned int out_shndx
= output_section
->out_shndx();
1141 // Get a view for the .gnu_incremental_relocs section.
1143 Incremental_inputs
* inputs
= relinfo
->layout
->incremental_inputs();
1144 gold_assert(inputs
!= NULL
);
1145 const off_t relocs_off
= inputs
->relocs_section()->offset();
1146 const off_t relocs_size
= inputs
->relocs_section()->data_size();
1147 unsigned char* const view
= of
->get_output_view(relocs_off
, relocs_size
);
1149 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
1151 Reloc
reloc(prelocs
);
1153 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
= reloc
.get_r_info();
1154 const unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
1155 const unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
1157 if (r_sym
< this->local_symbol_count_
)
1160 // Get the new offset--the location in the output section where
1161 // this relocation should be applied.
1163 Address offset
= reloc
.get_r_offset();
1164 if (output_offset
!= invalid_address
)
1165 offset
+= output_offset
;
1168 section_offset_type sot_offset
=
1169 convert_types
<section_offset_type
, Address
>(offset
);
1170 section_offset_type new_sot_offset
=
1171 output_section
->output_offset(relinfo
->object
,
1172 relinfo
->data_shndx
,
1174 gold_assert(new_sot_offset
!= -1);
1175 offset
+= new_sot_offset
;
1179 typename
elfcpp::Elf_types
<size
>::Elf_Swxword addend
;
1180 if (sh_type
== elfcpp::SHT_RELA
)
1182 Reloc_types
<sh_type
, size
, big_endian
>::get_reloc_addend(&reloc
);
1185 // FIXME: Get the addend for SHT_REL.
1189 // Get the index of the output relocation.
1191 unsigned int reloc_index
=
1192 this->next_incremental_reloc_index(r_sym
- this->local_symbol_count_
);
1194 // Write the relocation.
1196 unsigned char* pov
= view
+ reloc_index
* incr_reloc_size
;
1197 elfcpp::Swap
<32, big_endian
>::writeval(pov
, r_type
);
1198 elfcpp::Swap
<32, big_endian
>::writeval(pov
+ 4, out_shndx
);
1199 elfcpp::Swap
<size
, big_endian
>::writeval(pov
+ 8, offset
);
1200 elfcpp::Swap
<size
, big_endian
>::writeval(pov
+ 8 + sizeof_addr
, addend
);
1201 of
->write_output_view(pov
- view
, incr_reloc_size
, view
);
1205 // Create merge hash tables for the local symbols. These are used to
1206 // speed up relocations.
1208 template<int size
, bool big_endian
>
1210 Sized_relobj
<size
, big_endian
>::initialize_input_to_output_maps()
1212 const unsigned int loccount
= this->local_symbol_count_
;
1213 for (unsigned int i
= 1; i
< loccount
; ++i
)
1215 Symbol_value
<size
>& lv(this->local_values_
[i
]);
1216 lv
.initialize_input_to_output_map(this);
1220 // Free merge hash tables for the local symbols.
1222 template<int size
, bool big_endian
>
1224 Sized_relobj
<size
, big_endian
>::free_input_to_output_maps()
1226 const unsigned int loccount
= this->local_symbol_count_
;
1227 for (unsigned int i
= 1; i
< loccount
; ++i
)
1229 Symbol_value
<size
>& lv(this->local_values_
[i
]);
1230 lv
.free_input_to_output_map();
1234 // If an object was compiled with -fsplit-stack, this is called to
1235 // check whether any relocations refer to functions defined in objects
1236 // which were not compiled with -fsplit-stack. If they were, then we
1237 // need to apply some target-specific adjustments to request
1238 // additional stack space.
1240 template<int size
, bool big_endian
>
1242 Sized_relobj
<size
, big_endian
>::split_stack_adjust(
1243 const Symbol_table
* symtab
,
1244 const unsigned char* pshdrs
,
1245 unsigned int sh_type
,
1247 const unsigned char* prelocs
,
1249 unsigned char* view
,
1250 section_size_type view_size
,
1251 Reloc_symbol_changes
** reloc_map
)
1253 if (sh_type
== elfcpp::SHT_REL
)
1254 this->split_stack_adjust_reltype
<elfcpp::SHT_REL
>(symtab
, pshdrs
, shndx
,
1255 prelocs
, reloc_count
,
1260 gold_assert(sh_type
== elfcpp::SHT_RELA
);
1261 this->split_stack_adjust_reltype
<elfcpp::SHT_RELA
>(symtab
, pshdrs
, shndx
,
1262 prelocs
, reloc_count
,
1268 // Adjust for -fsplit-stack, templatized on the type of the relocation
1271 template<int size
, bool big_endian
>
1272 template<int sh_type
>
1274 Sized_relobj
<size
, big_endian
>::split_stack_adjust_reltype(
1275 const Symbol_table
* symtab
,
1276 const unsigned char* pshdrs
,
1278 const unsigned char* prelocs
,
1280 unsigned char* view
,
1281 section_size_type view_size
,
1282 Reloc_symbol_changes
** reloc_map
)
1284 typedef typename Reloc_types
<sh_type
, size
, big_endian
>::Reloc Reltype
;
1285 const int reloc_size
= Reloc_types
<sh_type
, size
, big_endian
>::reloc_size
;
1287 size_t local_count
= this->local_symbol_count();
1289 std::vector
<section_offset_type
> non_split_refs
;
1291 const unsigned char* pr
= prelocs
;
1292 for (size_t i
= 0; i
< reloc_count
; ++i
, pr
+= reloc_size
)
1296 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
= reloc
.get_r_info();
1297 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
1298 if (r_sym
< local_count
)
1301 const Symbol
* gsym
= this->global_symbol(r_sym
);
1302 gold_assert(gsym
!= NULL
);
1303 if (gsym
->is_forwarder())
1304 gsym
= symtab
->resolve_forwards(gsym
);
1306 // See if this relocation refers to a function defined in an
1307 // object compiled without -fsplit-stack. Note that we don't
1308 // care about the type of relocation--this means that in some
1309 // cases we will ask for a large stack unnecessarily, but this
1310 // is not fatal. FIXME: Some targets have symbols which are
1311 // functions but are not type STT_FUNC, e.g., STT_ARM_TFUNC.
1312 if (!gsym
->is_undefined()
1313 && gsym
->source() == Symbol::FROM_OBJECT
1314 && !gsym
->object()->uses_split_stack())
1316 unsigned int r_type
= elfcpp::elf_r_type
<size
>(reloc
.get_r_info());
1317 if (parameters
->target().is_call_to_non_split(gsym
, r_type
))
1319 section_offset_type offset
=
1320 convert_to_section_size_type(reloc
.get_r_offset());
1321 non_split_refs
.push_back(offset
);
1326 if (non_split_refs
.empty())
1329 // At this point, every entry in NON_SPLIT_REFS indicates a
1330 // relocation which refers to a function in an object compiled
1331 // without -fsplit-stack. We now have to convert that list into a
1332 // set of offsets to functions. First, we find all the functions.
1334 Function_offsets function_offsets
;
1335 this->find_functions(pshdrs
, shndx
, &function_offsets
);
1336 if (function_offsets
.empty())
1339 // Now get a list of the function with references to non split-stack
1342 Function_offsets calls_non_split
;
1343 for (std::vector
<section_offset_type
>::const_iterator p
1344 = non_split_refs
.begin();
1345 p
!= non_split_refs
.end();
1348 Function_offsets::const_iterator low
= function_offsets
.lower_bound(*p
);
1349 if (low
== function_offsets
.end())
1351 else if (low
->first
== *p
)
1353 else if (low
== function_offsets
.begin())
1358 calls_non_split
.insert(*low
);
1360 if (calls_non_split
.empty())
1363 // Now we have a set of functions to adjust. The adjustments are
1364 // target specific. Besides changing the output section view
1365 // however, it likes, the target may request a relocation change
1366 // from one global symbol name to another.
1368 for (Function_offsets::const_iterator p
= calls_non_split
.begin();
1369 p
!= calls_non_split
.end();
1374 parameters
->target().calls_non_split(this, shndx
, p
->first
, p
->second
,
1375 view
, view_size
, &from
, &to
);
1378 gold_assert(!to
.empty());
1379 Symbol
* tosym
= NULL
;
1381 // Find relocations in the relevant function which are for
1384 for (size_t i
= 0; i
< reloc_count
; ++i
, pr
+= reloc_size
)
1388 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
=
1390 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
1391 if (r_sym
< local_count
)
1394 section_offset_type offset
=
1395 convert_to_section_size_type(reloc
.get_r_offset());
1396 if (offset
< p
->first
1399 + static_cast<section_offset_type
>(p
->second
))))
1402 const Symbol
* gsym
= this->global_symbol(r_sym
);
1403 if (from
== gsym
->name())
1407 tosym
= symtab
->lookup(to
.c_str());
1410 this->error(_("could not convert call "
1412 from
.c_str(), to
.c_str());
1417 if (*reloc_map
== NULL
)
1418 *reloc_map
= new Reloc_symbol_changes(reloc_count
);
1419 (*reloc_map
)->set(i
, tosym
);
1426 // Find all the function in this object defined in section SHNDX.
1427 // Store their offsets in the section in FUNCTION_OFFSETS.
1429 template<int size
, bool big_endian
>
1431 Sized_relobj
<size
, big_endian
>::find_functions(
1432 const unsigned char* pshdrs
,
1434 Sized_relobj
<size
, big_endian
>::Function_offsets
* function_offsets
)
1436 // We need to read the symbols to find the functions. If we wanted
1437 // to, we could cache reading the symbols across all sections in the
1439 const unsigned int symtab_shndx
= this->symtab_shndx_
;
1440 typename
This::Shdr
symtabshdr(pshdrs
+ symtab_shndx
* This::shdr_size
);
1441 gold_assert(symtabshdr
.get_sh_type() == elfcpp::SHT_SYMTAB
);
1443 typename
elfcpp::Elf_types
<size
>::Elf_WXword sh_size
=
1444 symtabshdr
.get_sh_size();
1445 const unsigned char* psyms
= this->get_view(symtabshdr
.get_sh_offset(),
1446 sh_size
, true, true);
1448 const int sym_size
= This::sym_size
;
1449 const unsigned int symcount
= sh_size
/ sym_size
;
1450 for (unsigned int i
= 0; i
< symcount
; ++i
, psyms
+= sym_size
)
1452 typename
elfcpp::Sym
<size
, big_endian
> isym(psyms
);
1454 // FIXME: Some targets can have functions which do not have type
1455 // STT_FUNC, e.g., STT_ARM_TFUNC.
1456 if (isym
.get_st_type() != elfcpp::STT_FUNC
1457 || isym
.get_st_size() == 0)
1461 unsigned int sym_shndx
= this->adjust_sym_shndx(i
, isym
.get_st_shndx(),
1463 if (!is_ordinary
|| sym_shndx
!= shndx
)
1466 section_offset_type value
=
1467 convert_to_section_size_type(isym
.get_st_value());
1468 section_size_type fnsize
=
1469 convert_to_section_size_type(isym
.get_st_size());
1471 (*function_offsets
)[value
] = fnsize
;
1475 // Class Merged_symbol_value.
1479 Merged_symbol_value
<size
>::initialize_input_to_output_map(
1480 const Relobj
* object
,
1481 unsigned int input_shndx
)
1483 Object_merge_map
* map
= object
->merge_map();
1484 map
->initialize_input_to_output_map
<size
>(input_shndx
,
1485 this->output_start_address_
,
1486 &this->output_addresses_
);
1489 // Get the output value corresponding to an input offset if we
1490 // couldn't find it in the hash table.
1493 typename
elfcpp::Elf_types
<size
>::Elf_Addr
1494 Merged_symbol_value
<size
>::value_from_output_section(
1495 const Relobj
* object
,
1496 unsigned int input_shndx
,
1497 typename
elfcpp::Elf_types
<size
>::Elf_Addr input_offset
) const
1499 section_offset_type output_offset
;
1500 bool found
= object
->merge_map()->get_output_offset(NULL
, input_shndx
,
1504 // If this assertion fails, it means that some relocation was
1505 // against a portion of an input merge section which we didn't map
1506 // to the output file and we didn't explicitly discard. We should
1507 // always map all portions of input merge sections.
1510 if (output_offset
== -1)
1513 return this->output_start_address_
+ output_offset
;
1516 // Track_relocs methods.
1518 // Initialize the class to track the relocs. This gets the object,
1519 // the reloc section index, and the type of the relocs. This returns
1520 // false if something goes wrong.
1522 template<int size
, bool big_endian
>
1524 Track_relocs
<size
, big_endian
>::initialize(
1526 unsigned int reloc_shndx
,
1527 unsigned int reloc_type
)
1529 // If RELOC_SHNDX is -1U, it means there is more than one reloc
1530 // section for the .eh_frame section. We can't handle that case.
1531 if (reloc_shndx
== -1U)
1534 // If RELOC_SHNDX is 0, there is no reloc section.
1535 if (reloc_shndx
== 0)
1538 // Get the contents of the reloc section.
1539 this->prelocs_
= object
->section_contents(reloc_shndx
, &this->len_
, false);
1541 if (reloc_type
== elfcpp::SHT_REL
)
1542 this->reloc_size_
= elfcpp::Elf_sizes
<size
>::rel_size
;
1543 else if (reloc_type
== elfcpp::SHT_RELA
)
1544 this->reloc_size_
= elfcpp::Elf_sizes
<size
>::rela_size
;
1548 if (this->len_
% this->reloc_size_
!= 0)
1550 object
->error(_("reloc section size %zu is not a multiple of "
1552 static_cast<size_t>(this->len_
),
1560 // Return the offset of the next reloc, or -1 if there isn't one.
1562 template<int size
, bool big_endian
>
1564 Track_relocs
<size
, big_endian
>::next_offset() const
1566 if (this->pos_
>= this->len_
)
1569 // Rel and Rela start out the same, so we can always use Rel to find
1570 // the r_offset value.
1571 elfcpp::Rel
<size
, big_endian
> rel(this->prelocs_
+ this->pos_
);
1572 return rel
.get_r_offset();
1575 // Return the index of the symbol referenced by the next reloc, or -1U
1576 // if there aren't any more relocs.
1578 template<int size
, bool big_endian
>
1580 Track_relocs
<size
, big_endian
>::next_symndx() const
1582 if (this->pos_
>= this->len_
)
1585 // Rel and Rela start out the same, so we can use Rel to find the
1587 elfcpp::Rel
<size
, big_endian
> rel(this->prelocs_
+ this->pos_
);
1588 return elfcpp::elf_r_sym
<size
>(rel
.get_r_info());
1591 // Return the addend of the next reloc, or 0 if there isn't one.
1593 template<int size
, bool big_endian
>
1595 Track_relocs
<size
, big_endian
>::next_addend() const
1597 if (this->pos_
>= this->len_
)
1599 if (this->reloc_size_
== elfcpp::Elf_sizes
<size
>::rel_size
)
1601 elfcpp::Rela
<size
, big_endian
> rela(this->prelocs_
+ this->pos_
);
1602 return rela
.get_r_addend();
1605 // Advance to the next reloc whose r_offset is greater than or equal
1606 // to OFFSET. Return the number of relocs we skip.
1608 template<int size
, bool big_endian
>
1610 Track_relocs
<size
, big_endian
>::advance(off_t offset
)
1613 while (this->pos_
< this->len_
)
1615 // Rel and Rela start out the same, so we can always use Rel to
1616 // find the r_offset value.
1617 elfcpp::Rel
<size
, big_endian
> rel(this->prelocs_
+ this->pos_
);
1618 if (static_cast<off_t
>(rel
.get_r_offset()) >= offset
)
1621 this->pos_
+= this->reloc_size_
;
1626 // Instantiate the templates we need.
1628 #ifdef HAVE_TARGET_32_LITTLE
1631 Sized_relobj
<32, false>::do_read_relocs(Read_relocs_data
* rd
);
1634 #ifdef HAVE_TARGET_32_BIG
1637 Sized_relobj
<32, true>::do_read_relocs(Read_relocs_data
* rd
);
1640 #ifdef HAVE_TARGET_64_LITTLE
1643 Sized_relobj
<64, false>::do_read_relocs(Read_relocs_data
* rd
);
1646 #ifdef HAVE_TARGET_64_BIG
1649 Sized_relobj
<64, true>::do_read_relocs(Read_relocs_data
* rd
);
1652 #ifdef HAVE_TARGET_32_LITTLE
1655 Sized_relobj
<32, false>::do_gc_process_relocs(Symbol_table
* symtab
,
1657 Read_relocs_data
* rd
);
1660 #ifdef HAVE_TARGET_32_BIG
1663 Sized_relobj
<32, true>::do_gc_process_relocs(Symbol_table
* symtab
,
1665 Read_relocs_data
* rd
);
1668 #ifdef HAVE_TARGET_64_LITTLE
1671 Sized_relobj
<64, false>::do_gc_process_relocs(Symbol_table
* symtab
,
1673 Read_relocs_data
* rd
);
1676 #ifdef HAVE_TARGET_64_BIG
1679 Sized_relobj
<64, true>::do_gc_process_relocs(Symbol_table
* symtab
,
1681 Read_relocs_data
* rd
);
1684 #ifdef HAVE_TARGET_32_LITTLE
1687 Sized_relobj
<32, false>::do_scan_relocs(Symbol_table
* symtab
,
1689 Read_relocs_data
* rd
);
1692 #ifdef HAVE_TARGET_32_BIG
1695 Sized_relobj
<32, true>::do_scan_relocs(Symbol_table
* symtab
,
1697 Read_relocs_data
* rd
);
1700 #ifdef HAVE_TARGET_64_LITTLE
1703 Sized_relobj
<64, false>::do_scan_relocs(Symbol_table
* symtab
,
1705 Read_relocs_data
* rd
);
1708 #ifdef HAVE_TARGET_64_BIG
1711 Sized_relobj
<64, true>::do_scan_relocs(Symbol_table
* symtab
,
1713 Read_relocs_data
* rd
);
1716 #ifdef HAVE_TARGET_32_LITTLE
1719 Sized_relobj
<32, false>::do_relocate(const Symbol_table
* symtab
,
1720 const Layout
* layout
,
1724 #ifdef HAVE_TARGET_32_BIG
1727 Sized_relobj
<32, true>::do_relocate(const Symbol_table
* symtab
,
1728 const Layout
* layout
,
1732 #ifdef HAVE_TARGET_64_LITTLE
1735 Sized_relobj
<64, false>::do_relocate(const Symbol_table
* symtab
,
1736 const Layout
* layout
,
1740 #ifdef HAVE_TARGET_64_BIG
1743 Sized_relobj
<64, true>::do_relocate(const Symbol_table
* symtab
,
1744 const Layout
* layout
,
1748 #ifdef HAVE_TARGET_32_LITTLE
1751 Sized_relobj
<32, false>::do_relocate_sections(
1752 const Symbol_table
* symtab
,
1753 const Layout
* layout
,
1754 const unsigned char* pshdrs
,
1759 #ifdef HAVE_TARGET_32_BIG
1762 Sized_relobj
<32, true>::do_relocate_sections(
1763 const Symbol_table
* symtab
,
1764 const Layout
* layout
,
1765 const unsigned char* pshdrs
,
1770 #ifdef HAVE_TARGET_64_LITTLE
1773 Sized_relobj
<64, false>::do_relocate_sections(
1774 const Symbol_table
* symtab
,
1775 const Layout
* layout
,
1776 const unsigned char* pshdrs
,
1781 #ifdef HAVE_TARGET_64_BIG
1784 Sized_relobj
<64, true>::do_relocate_sections(
1785 const Symbol_table
* symtab
,
1786 const Layout
* layout
,
1787 const unsigned char* pshdrs
,
1792 #ifdef HAVE_TARGET_32_LITTLE
1795 Sized_relobj
<32, false>::initialize_input_to_output_maps();
1799 Sized_relobj
<32, false>::free_input_to_output_maps();
1802 #ifdef HAVE_TARGET_32_BIG
1805 Sized_relobj
<32, true>::initialize_input_to_output_maps();
1809 Sized_relobj
<32, true>::free_input_to_output_maps();
1812 #ifdef HAVE_TARGET_64_LITTLE
1815 Sized_relobj
<64, false>::initialize_input_to_output_maps();
1819 Sized_relobj
<64, false>::free_input_to_output_maps();
1822 #ifdef HAVE_TARGET_64_BIG
1825 Sized_relobj
<64, true>::initialize_input_to_output_maps();
1829 Sized_relobj
<64, true>::free_input_to_output_maps();
1832 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
1834 class Merged_symbol_value
<32>;
1837 #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
1839 class Merged_symbol_value
<64>;
1842 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
1844 class Symbol_value
<32>;
1847 #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
1849 class Symbol_value
<64>;
1852 #ifdef HAVE_TARGET_32_LITTLE
1854 class Track_relocs
<32, false>;
1857 #ifdef HAVE_TARGET_32_BIG
1859 class Track_relocs
<32, true>;
1862 #ifdef HAVE_TARGET_64_LITTLE
1864 class Track_relocs
<64, false>;
1867 #ifdef HAVE_TARGET_64_BIG
1869 class Track_relocs
<64, true>;
1872 } // End namespace gold.