1 // reloc.cc -- relocate input files for gold.
3 // Copyright (C) 2006-2015 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 Task_token
* token
= this->object_
->token();
64 // Read the relocations and then start a Scan_relocs_task.
67 Read_relocs::run(Workqueue
* workqueue
)
69 Read_relocs_data
* rd
= new Read_relocs_data
;
70 this->object_
->read_relocs(rd
);
71 this->object_
->set_relocs_data(rd
);
72 this->object_
->release();
74 // If garbage collection or identical comdat folding is desired, we
75 // process the relocs first before scanning them. Scanning of relocs is
76 // done only after garbage or identical sections is identified.
77 if (parameters
->options().gc_sections()
78 || parameters
->options().icf_enabled())
80 workqueue
->queue_next(new Gc_process_relocs(this->symtab_
,
84 this->next_blocker_
));
88 workqueue
->queue_next(new Scan_relocs(this->symtab_
, this->layout_
,
91 this->next_blocker_
));
95 // Return a debugging name for the task.
98 Read_relocs::get_name() const
100 return "Read_relocs " + this->object_
->name();
103 // Gc_process_relocs methods.
105 Gc_process_relocs::~Gc_process_relocs()
107 if (this->this_blocker_
!= NULL
)
108 delete this->this_blocker_
;
111 // These tasks process the relocations read by Read_relocs and
112 // determine which sections are referenced and which are garbage.
113 // This task is done only when --gc-sections is used. This is blocked
114 // by THIS_BLOCKER_. It unblocks NEXT_BLOCKER_.
117 Gc_process_relocs::is_runnable()
119 if (this->this_blocker_
!= NULL
&& this->this_blocker_
->is_blocked())
120 return this->this_blocker_
;
121 if (this->object_
->is_locked())
122 return this->object_
->token();
127 Gc_process_relocs::locks(Task_locker
* tl
)
129 tl
->add(this, this->object_
->token());
130 tl
->add(this, this->next_blocker_
);
134 Gc_process_relocs::run(Workqueue
*)
136 this->object_
->gc_process_relocs(this->symtab_
, this->layout_
, this->rd_
);
137 this->object_
->release();
140 // Return a debugging name for the task.
143 Gc_process_relocs::get_name() const
145 return "Gc_process_relocs " + this->object_
->name();
148 // Scan_relocs methods.
150 Scan_relocs::~Scan_relocs()
152 if (this->this_blocker_
!= NULL
)
153 delete this->this_blocker_
;
156 // These tasks scan the relocations read by Read_relocs and mark up
157 // the symbol table to indicate which relocations are required. We
158 // use a lock on the symbol table to keep them from interfering with
162 Scan_relocs::is_runnable()
164 if (this->this_blocker_
!= NULL
&& this->this_blocker_
->is_blocked())
165 return this->this_blocker_
;
166 if (this->object_
->is_locked())
167 return this->object_
->token();
171 // Return the locks we hold: one on the file, one on the symbol table
175 Scan_relocs::locks(Task_locker
* tl
)
177 Task_token
* token
= this->object_
->token();
179 tl
->add(this, token
);
180 tl
->add(this, this->next_blocker_
);
186 Scan_relocs::run(Workqueue
*)
188 this->object_
->scan_relocs(this->symtab_
, this->layout_
, this->rd_
);
191 this->object_
->release();
194 // Return a debugging name for the task.
197 Scan_relocs::get_name() const
199 return "Scan_relocs " + this->object_
->name();
202 // Relocate_task methods.
204 // We may have to wait for the output sections to be written.
207 Relocate_task::is_runnable()
209 if (this->object_
->relocs_must_follow_section_writes()
210 && this->output_sections_blocker_
->is_blocked())
211 return this->output_sections_blocker_
;
213 if (this->object_
->is_locked())
214 return this->object_
->token();
219 // We want to lock the file while we run. We want to unblock
220 // INPUT_SECTIONS_BLOCKER and FINAL_BLOCKER when we are done.
221 // INPUT_SECTIONS_BLOCKER may be NULL.
224 Relocate_task::locks(Task_locker
* tl
)
226 if (this->input_sections_blocker_
!= NULL
)
227 tl
->add(this, this->input_sections_blocker_
);
228 tl
->add(this, this->final_blocker_
);
229 Task_token
* token
= this->object_
->token();
231 tl
->add(this, token
);
237 Relocate_task::run(Workqueue
*)
239 this->object_
->relocate(this->symtab_
, this->layout_
, this->of_
);
241 // This is normally the last thing we will do with an object, so
242 // uncache all views.
243 this->object_
->clear_view_cache_marks();
245 this->object_
->release();
248 // Return a debugging name for the task.
251 Relocate_task::get_name() const
253 return "Relocate_task " + this->object_
->name();
256 // Read the relocs and local symbols from the object file and store
257 // the information in RD.
259 template<int size
, bool big_endian
>
261 Sized_relobj_file
<size
, big_endian
>::do_read_relocs(Read_relocs_data
* rd
)
265 unsigned int shnum
= this->shnum();
269 rd
->relocs
.reserve(shnum
/ 2);
271 const Output_sections
& out_sections(this->output_sections());
272 const std::vector
<Address
>& out_offsets(this->section_offsets());
274 const unsigned char* pshdrs
= this->get_view(this->elf_file_
.shoff(),
275 shnum
* This::shdr_size
,
277 // Skip the first, dummy, section.
278 const unsigned char* ps
= pshdrs
+ This::shdr_size
;
279 for (unsigned int i
= 1; i
< shnum
; ++i
, ps
+= This::shdr_size
)
281 typename
This::Shdr
shdr(ps
);
283 unsigned int sh_type
= shdr
.get_sh_type();
284 if (sh_type
!= elfcpp::SHT_REL
&& sh_type
!= elfcpp::SHT_RELA
)
287 unsigned int shndx
= this->adjust_shndx(shdr
.get_sh_info());
290 this->error(_("relocation section %u has bad info %u"),
295 Output_section
* os
= out_sections
[shndx
];
299 // We are scanning relocations in order to fill out the GOT and
300 // PLT sections. Relocations for sections which are not
301 // allocated (typically debugging sections) should not add new
302 // GOT and PLT entries. So we skip them unless this is a
303 // relocatable link or we need to emit relocations. FIXME: What
304 // should we do if a linker script maps a section with SHF_ALLOC
305 // clear to a section with SHF_ALLOC set?
306 typename
This::Shdr
secshdr(pshdrs
+ shndx
* This::shdr_size
);
307 bool is_section_allocated
= ((secshdr
.get_sh_flags() & elfcpp::SHF_ALLOC
)
309 if (!is_section_allocated
310 && !parameters
->options().relocatable()
311 && !parameters
->options().emit_relocs()
312 && !parameters
->incremental())
315 if (this->adjust_shndx(shdr
.get_sh_link()) != this->symtab_shndx_
)
317 this->error(_("relocation section %u uses unexpected "
319 i
, this->adjust_shndx(shdr
.get_sh_link()));
323 off_t sh_size
= shdr
.get_sh_size();
328 unsigned int reloc_size
;
329 if (sh_type
== elfcpp::SHT_REL
)
330 reloc_size
= elfcpp::Elf_sizes
<size
>::rel_size
;
332 reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
333 if (reloc_size
!= shdr
.get_sh_entsize())
335 this->error(_("unexpected entsize for reloc section %u: %lu != %u"),
336 i
, static_cast<unsigned long>(shdr
.get_sh_entsize()),
341 size_t reloc_count
= sh_size
/ reloc_size
;
342 if (static_cast<off_t
>(reloc_count
* reloc_size
) != sh_size
)
344 this->error(_("reloc section %u size %lu uneven"),
345 i
, static_cast<unsigned long>(sh_size
));
349 rd
->relocs
.push_back(Section_relocs());
350 Section_relocs
& sr(rd
->relocs
.back());
352 sr
.data_shndx
= shndx
;
353 sr
.contents
= this->get_lasting_view(shdr
.get_sh_offset(), sh_size
,
355 sr
.sh_type
= sh_type
;
356 sr
.reloc_count
= reloc_count
;
357 sr
.output_section
= os
;
358 sr
.needs_special_offset_handling
= out_offsets
[shndx
] == invalid_address
;
359 sr
.is_data_section_allocated
= is_section_allocated
;
362 // Read the local symbols.
363 gold_assert(this->symtab_shndx_
!= -1U);
364 if (this->symtab_shndx_
== 0 || this->local_symbol_count_
== 0)
365 rd
->local_symbols
= NULL
;
368 typename
This::Shdr
symtabshdr(pshdrs
369 + this->symtab_shndx_
* This::shdr_size
);
370 gold_assert(symtabshdr
.get_sh_type() == elfcpp::SHT_SYMTAB
);
371 const int sym_size
= This::sym_size
;
372 const unsigned int loccount
= this->local_symbol_count_
;
373 gold_assert(loccount
== symtabshdr
.get_sh_info());
374 off_t locsize
= loccount
* sym_size
;
375 rd
->local_symbols
= this->get_lasting_view(symtabshdr
.get_sh_offset(),
376 locsize
, true, true);
380 // Process the relocs to generate mappings from source sections to referenced
381 // sections. This is used during garbage collection to determine garbage
384 template<int size
, bool big_endian
>
386 Sized_relobj_file
<size
, big_endian
>::do_gc_process_relocs(Symbol_table
* symtab
,
388 Read_relocs_data
* rd
)
390 Sized_target
<size
, big_endian
>* target
=
391 parameters
->sized_target
<size
, big_endian
>();
393 const unsigned char* local_symbols
;
394 if (rd
->local_symbols
== NULL
)
395 local_symbols
= NULL
;
397 local_symbols
= rd
->local_symbols
->data();
399 for (Read_relocs_data::Relocs_list::iterator p
= rd
->relocs
.begin();
400 p
!= rd
->relocs
.end();
403 if (!parameters
->options().relocatable())
405 // As noted above, when not generating an object file, we
406 // only scan allocated sections. We may see a non-allocated
407 // section here if we are emitting relocs.
408 if (p
->is_data_section_allocated
)
409 target
->gc_process_relocs(symtab
, layout
, this,
410 p
->data_shndx
, p
->sh_type
,
411 p
->contents
->data(), p
->reloc_count
,
413 p
->needs_special_offset_handling
,
414 this->local_symbol_count_
,
421 // Scan the relocs and adjust the symbol table. This looks for
422 // relocations which require GOT/PLT/COPY relocations.
424 template<int size
, bool big_endian
>
426 Sized_relobj_file
<size
, big_endian
>::do_scan_relocs(Symbol_table
* symtab
,
428 Read_relocs_data
* rd
)
430 Sized_target
<size
, big_endian
>* target
=
431 parameters
->sized_target
<size
, big_endian
>();
433 const unsigned char* local_symbols
;
434 if (rd
->local_symbols
== NULL
)
435 local_symbols
= NULL
;
437 local_symbols
= rd
->local_symbols
->data();
439 // For incremental links, allocate the counters for incremental relocations.
440 if (layout
->incremental_inputs() != NULL
)
441 this->allocate_incremental_reloc_counts();
443 for (Read_relocs_data::Relocs_list::iterator p
= rd
->relocs
.begin();
444 p
!= rd
->relocs
.end();
447 // When garbage collection is on, unreferenced sections are not included
448 // in the link that would have been included normally. This is known only
449 // after Read_relocs hence this check has to be done again.
450 if (parameters
->options().gc_sections()
451 || parameters
->options().icf_enabled())
453 if (p
->output_section
== NULL
)
456 if (!parameters
->options().relocatable())
458 // As noted above, when not generating an object file, we
459 // only scan allocated sections. We may see a non-allocated
460 // section here if we are emitting relocs.
461 if (p
->is_data_section_allocated
)
462 target
->scan_relocs(symtab
, layout
, this, p
->data_shndx
,
463 p
->sh_type
, p
->contents
->data(),
464 p
->reloc_count
, p
->output_section
,
465 p
->needs_special_offset_handling
,
466 this->local_symbol_count_
,
468 if (parameters
->options().emit_relocs())
469 this->emit_relocs_scan(symtab
, layout
, local_symbols
, p
);
470 if (layout
->incremental_inputs() != NULL
)
471 this->incremental_relocs_scan(p
);
475 Relocatable_relocs
* rr
= this->relocatable_relocs(p
->reloc_shndx
);
476 gold_assert(rr
!= NULL
);
477 rr
->set_reloc_count(p
->reloc_count
);
478 target
->scan_relocatable_relocs(symtab
, layout
, this,
479 p
->data_shndx
, p
->sh_type
,
483 p
->needs_special_offset_handling
,
484 this->local_symbol_count_
,
493 // For incremental links, finalize the allocation of relocations.
494 if (layout
->incremental_inputs() != NULL
)
495 this->finalize_incremental_relocs(layout
, true);
497 if (rd
->local_symbols
!= NULL
)
499 delete rd
->local_symbols
;
500 rd
->local_symbols
= NULL
;
504 // This is a strategy class we use when scanning for --emit-relocs.
506 template<int sh_type
>
507 class Emit_relocs_strategy
510 // A local non-section symbol.
511 inline Relocatable_relocs::Reloc_strategy
512 local_non_section_strategy(unsigned int, Relobj
*, unsigned int)
513 { return Relocatable_relocs::RELOC_COPY
; }
515 // A local section symbol.
516 inline Relocatable_relocs::Reloc_strategy
517 local_section_strategy(unsigned int, Relobj
*)
519 if (sh_type
== elfcpp::SHT_RELA
)
520 return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA
;
523 // The addend is stored in the section contents. Since this
524 // is not a relocatable link, we are going to apply the
525 // relocation contents to the section as usual. This means
526 // that we have no way to record the original addend. If the
527 // original addend is not zero, there is basically no way for
528 // the user to handle this correctly. Caveat emptor.
529 return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_0
;
534 inline Relocatable_relocs::Reloc_strategy
535 global_strategy(unsigned int, Relobj
*, unsigned int)
536 { return Relocatable_relocs::RELOC_COPY
; }
539 // Scan the input relocations for --emit-relocs.
541 template<int size
, bool big_endian
>
543 Sized_relobj_file
<size
, big_endian
>::emit_relocs_scan(
544 Symbol_table
* symtab
,
546 const unsigned char* plocal_syms
,
547 const Read_relocs_data::Relocs_list::iterator
& p
)
549 Relocatable_relocs
* rr
= this->relocatable_relocs(p
->reloc_shndx
);
550 gold_assert(rr
!= NULL
);
551 rr
->set_reloc_count(p
->reloc_count
);
553 if (p
->sh_type
== elfcpp::SHT_REL
)
554 this->emit_relocs_scan_reltype
<elfcpp::SHT_REL
>(symtab
, layout
,
558 gold_assert(p
->sh_type
== elfcpp::SHT_RELA
);
559 this->emit_relocs_scan_reltype
<elfcpp::SHT_RELA
>(symtab
, layout
,
564 // Scan the input relocation for --emit-relocs, templatized on the
565 // type of the relocation section.
567 template<int size
, bool big_endian
>
568 template<int sh_type
>
570 Sized_relobj_file
<size
, big_endian
>::emit_relocs_scan_reltype(
571 Symbol_table
* symtab
,
573 const unsigned char* plocal_syms
,
574 const Read_relocs_data::Relocs_list::iterator
& p
,
575 Relocatable_relocs
* rr
)
577 scan_relocatable_relocs
<size
, big_endian
, sh_type
,
578 Emit_relocs_strategy
<sh_type
> >(
586 p
->needs_special_offset_handling
,
587 this->local_symbol_count_
,
592 // Scan the input relocations for --incremental.
594 template<int size
, bool big_endian
>
596 Sized_relobj_file
<size
, big_endian
>::incremental_relocs_scan(
597 const Read_relocs_data::Relocs_list::iterator
& p
)
599 if (p
->sh_type
== elfcpp::SHT_REL
)
600 this->incremental_relocs_scan_reltype
<elfcpp::SHT_REL
>(p
);
603 gold_assert(p
->sh_type
== elfcpp::SHT_RELA
);
604 this->incremental_relocs_scan_reltype
<elfcpp::SHT_RELA
>(p
);
608 // Scan the input relocation for --incremental, templatized on the
609 // type of the relocation section.
611 template<int size
, bool big_endian
>
612 template<int sh_type
>
614 Sized_relobj_file
<size
, big_endian
>::incremental_relocs_scan_reltype(
615 const Read_relocs_data::Relocs_list::iterator
& p
)
617 typedef typename Reloc_types
<sh_type
, size
, big_endian
>::Reloc Reltype
;
618 const int reloc_size
= Reloc_types
<sh_type
, size
, big_endian
>::reloc_size
;
619 const unsigned char* prelocs
= p
->contents
->data();
620 size_t reloc_count
= p
->reloc_count
;
622 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
624 Reltype
reloc(prelocs
);
626 if (p
->needs_special_offset_handling
627 && !p
->output_section
->is_input_address_mapped(this, p
->data_shndx
,
628 reloc
.get_r_offset()))
631 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
=
633 const unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
635 if (r_sym
>= this->local_symbol_count_
)
636 this->count_incremental_reloc(r_sym
- this->local_symbol_count_
);
640 // Relocate the input sections and write out the local symbols.
642 template<int size
, bool big_endian
>
644 Sized_relobj_file
<size
, big_endian
>::do_relocate(const Symbol_table
* symtab
,
645 const Layout
* layout
,
648 unsigned int shnum
= this->shnum();
650 // Read the section headers.
651 const unsigned char* pshdrs
= this->get_view(this->elf_file_
.shoff(),
652 shnum
* This::shdr_size
,
658 // Make two passes over the sections. The first one copies the
659 // section data to the output file. The second one applies
662 this->write_sections(layout
, pshdrs
, of
, &views
);
664 // To speed up relocations, we set up hash tables for fast lookup of
665 // input offsets to output addresses.
666 this->initialize_input_to_output_maps();
668 // Make the views available through get_output_view() for the duration
669 // of this routine. This RAII class will reset output_views_ to NULL
670 // when the views go out of scope.
671 struct Set_output_views
673 Set_output_views(const Views
** ppviews
, const Views
* pviews
)
680 { *ppviews_
= NULL
; }
682 const Views
** ppviews_
;
684 Set_output_views
set_output_views(&this->output_views_
, &views
);
686 // Apply relocations.
688 this->relocate_sections(symtab
, layout
, pshdrs
, of
, &views
);
690 // After we've done the relocations, we release the hash tables,
691 // since we no longer need them.
692 this->free_input_to_output_maps();
694 // Write out the accumulated views.
695 for (unsigned int i
= 1; i
< shnum
; ++i
)
697 if (views
[i
].view
!= NULL
)
699 if (views
[i
].is_ctors_reverse_view
)
700 this->reverse_words(views
[i
].view
, views
[i
].view_size
);
701 if (!views
[i
].is_postprocessing_view
)
703 if (views
[i
].is_input_output_view
)
704 of
->write_input_output_view(views
[i
].offset
,
708 of
->write_output_view(views
[i
].offset
, views
[i
].view_size
,
714 // Write out the local symbols.
715 this->write_local_symbols(of
, layout
->sympool(), layout
->dynpool(),
716 layout
->symtab_xindex(), layout
->dynsym_xindex(),
717 layout
->symtab_section_offset());
720 // Sort a Read_multiple vector by file offset.
721 struct Read_multiple_compare
724 operator()(const File_read::Read_multiple_entry
& rme1
,
725 const File_read::Read_multiple_entry
& rme2
) const
726 { return rme1
.file_offset
< rme2
.file_offset
; }
729 // Write section data to the output file. PSHDRS points to the
730 // section headers. Record the views in *PVIEWS for use when
733 template<int size
, bool big_endian
>
735 Sized_relobj_file
<size
, big_endian
>::write_sections(const Layout
* layout
,
736 const unsigned char* pshdrs
,
740 unsigned int shnum
= this->shnum();
741 const Output_sections
& out_sections(this->output_sections());
742 const std::vector
<Address
>& out_offsets(this->section_offsets());
744 File_read::Read_multiple rm
;
745 bool is_sorted
= true;
747 const unsigned char* p
= pshdrs
+ This::shdr_size
;
748 for (unsigned int i
= 1; i
< shnum
; ++i
, p
+= This::shdr_size
)
750 View_size
* pvs
= &(*pviews
)[i
];
754 const Output_section
* os
= out_sections
[i
];
757 Address output_offset
= out_offsets
[i
];
759 typename
This::Shdr
shdr(p
);
761 if (shdr
.get_sh_type() == elfcpp::SHT_NOBITS
)
764 if ((parameters
->options().relocatable()
765 || parameters
->options().emit_relocs())
766 && (shdr
.get_sh_type() == elfcpp::SHT_REL
767 || shdr
.get_sh_type() == elfcpp::SHT_RELA
)
768 && (shdr
.get_sh_flags() & elfcpp::SHF_ALLOC
) == 0)
770 // This is a reloc section in a relocatable link or when
771 // emitting relocs. We don't need to read the input file.
772 // The size and file offset are stored in the
773 // Relocatable_relocs structure.
774 Relocatable_relocs
* rr
= this->relocatable_relocs(i
);
775 gold_assert(rr
!= NULL
);
776 Output_data
* posd
= rr
->output_data();
777 gold_assert(posd
!= NULL
);
779 pvs
->offset
= posd
->offset();
780 pvs
->view_size
= posd
->data_size();
781 pvs
->view
= of
->get_output_view(pvs
->offset
, pvs
->view_size
);
782 pvs
->address
= posd
->address();
783 pvs
->is_input_output_view
= false;
784 pvs
->is_postprocessing_view
= false;
785 pvs
->is_ctors_reverse_view
= false;
790 // In the normal case, this input section is simply mapped to
791 // the output section at offset OUTPUT_OFFSET.
793 // However, if OUTPUT_OFFSET == INVALID_ADDRESS, then input data is
794 // handled specially--e.g., a .eh_frame section. The relocation
795 // routines need to check for each reloc where it should be
796 // applied. For this case, we need an input/output view for the
797 // entire contents of the section in the output file. We don't
798 // want to copy the contents of the input section to the output
799 // section; the output section contents were already written,
800 // and we waited for them in Relocate_task::is_runnable because
801 // relocs_must_follow_section_writes is set for the object.
803 // Regardless of which of the above cases is true, we have to
804 // check requires_postprocessing of the output section. If that
805 // is false, then we work with views of the output file
806 // directly. If it is true, then we work with a separate
807 // buffer, and the output section is responsible for writing the
808 // final data to the output file.
810 off_t output_section_offset
;
811 Address output_section_size
;
812 if (!os
->requires_postprocessing())
814 output_section_offset
= os
->offset();
815 output_section_size
= convert_types
<Address
, off_t
>(os
->data_size());
819 output_section_offset
= 0;
820 output_section_size
=
821 convert_types
<Address
, off_t
>(os
->postprocessing_buffer_size());
825 section_size_type view_size
;
826 bool must_decompress
= false;
827 if (output_offset
!= invalid_address
)
829 view_start
= output_section_offset
+ output_offset
;
830 view_size
= convert_to_section_size_type(shdr
.get_sh_size());
831 section_size_type uncompressed_size
;
832 if (this->section_is_compressed(i
, &uncompressed_size
))
834 view_size
= uncompressed_size
;
835 must_decompress
= true;
840 view_start
= output_section_offset
;
841 view_size
= convert_to_section_size_type(output_section_size
);
847 gold_assert(output_offset
== invalid_address
848 || output_offset
+ view_size
<= output_section_size
);
851 if (os
->requires_postprocessing())
853 unsigned char* buffer
= os
->postprocessing_buffer();
854 view
= buffer
+ view_start
;
855 if (output_offset
!= invalid_address
&& !must_decompress
)
857 off_t sh_offset
= shdr
.get_sh_offset();
858 if (!rm
.empty() && rm
.back().file_offset
> sh_offset
)
860 rm
.push_back(File_read::Read_multiple_entry(sh_offset
,
866 if (output_offset
== invalid_address
)
867 view
= of
->get_input_output_view(view_start
, view_size
);
870 view
= of
->get_output_view(view_start
, view_size
);
871 if (!must_decompress
)
873 off_t sh_offset
= shdr
.get_sh_offset();
874 if (!rm
.empty() && rm
.back().file_offset
> sh_offset
)
876 rm
.push_back(File_read::Read_multiple_entry(sh_offset
,
884 // Read and decompress the section.
885 section_size_type len
;
886 const unsigned char* p
= this->section_contents(i
, &len
, false);
887 if (!decompress_input_section(p
, len
, view
, view_size
,
889 shdr
.get_sh_flags()))
890 this->error(_("could not decompress section %s"),
891 this->section_name(i
).c_str());
895 pvs
->address
= os
->address();
896 if (output_offset
!= invalid_address
)
897 pvs
->address
+= output_offset
;
898 pvs
->offset
= view_start
;
899 pvs
->view_size
= view_size
;
900 pvs
->is_input_output_view
= output_offset
== invalid_address
;
901 pvs
->is_postprocessing_view
= os
->requires_postprocessing();
902 pvs
->is_ctors_reverse_view
=
903 (!parameters
->options().relocatable()
904 && view_size
> size
/ 8
905 && (strcmp(os
->name(), ".init_array") == 0
906 || strcmp(os
->name(), ".fini_array") == 0)
907 && layout
->is_ctors_in_init_array(this, i
));
910 // Actually read the data.
914 std::sort(rm
.begin(), rm
.end(), Read_multiple_compare());
915 this->read_multiple(rm
);
919 // Relocate section data. VIEWS points to the section data as views
920 // in the output file.
922 template<int size
, bool big_endian
>
924 Sized_relobj_file
<size
, big_endian
>::do_relocate_sections(
925 const Symbol_table
* symtab
,
926 const Layout
* layout
,
927 const unsigned char* pshdrs
,
931 unsigned int shnum
= this->shnum();
932 Sized_target
<size
, big_endian
>* target
=
933 parameters
->sized_target
<size
, big_endian
>();
935 const Output_sections
& out_sections(this->output_sections());
936 const std::vector
<Address
>& out_offsets(this->section_offsets());
938 Relocate_info
<size
, big_endian
> relinfo
;
939 relinfo
.symtab
= symtab
;
940 relinfo
.layout
= layout
;
941 relinfo
.object
= this;
943 const unsigned char* p
= pshdrs
+ This::shdr_size
;
944 for (unsigned int i
= 1; i
< shnum
; ++i
, p
+= This::shdr_size
)
946 typename
This::Shdr
shdr(p
);
948 unsigned int sh_type
= shdr
.get_sh_type();
949 if (sh_type
!= elfcpp::SHT_REL
&& sh_type
!= elfcpp::SHT_RELA
)
952 off_t sh_size
= shdr
.get_sh_size();
956 unsigned int index
= this->adjust_shndx(shdr
.get_sh_info());
957 if (index
>= this->shnum())
959 this->error(_("relocation section %u has bad info %u"),
964 Output_section
* os
= out_sections
[index
];
967 // This relocation section is against a section which we
971 Address output_offset
= out_offsets
[index
];
973 gold_assert((*pviews
)[index
].view
!= NULL
);
974 if (parameters
->options().relocatable())
975 gold_assert((*pviews
)[i
].view
!= NULL
);
977 if (this->adjust_shndx(shdr
.get_sh_link()) != this->symtab_shndx_
)
979 gold_error(_("relocation section %u uses unexpected "
981 i
, this->adjust_shndx(shdr
.get_sh_link()));
985 const unsigned char* prelocs
= this->get_view(shdr
.get_sh_offset(),
986 sh_size
, true, false);
988 unsigned int reloc_size
;
989 if (sh_type
== elfcpp::SHT_REL
)
990 reloc_size
= elfcpp::Elf_sizes
<size
>::rel_size
;
992 reloc_size
= elfcpp::Elf_sizes
<size
>::rela_size
;
994 if (reloc_size
!= shdr
.get_sh_entsize())
996 gold_error(_("unexpected entsize for reloc section %u: %lu != %u"),
997 i
, static_cast<unsigned long>(shdr
.get_sh_entsize()),
1002 size_t reloc_count
= sh_size
/ reloc_size
;
1003 if (static_cast<off_t
>(reloc_count
* reloc_size
) != sh_size
)
1005 gold_error(_("reloc section %u size %lu uneven"),
1006 i
, static_cast<unsigned long>(sh_size
));
1010 gold_assert(output_offset
!= invalid_address
1011 || this->relocs_must_follow_section_writes());
1013 relinfo
.reloc_shndx
= i
;
1014 relinfo
.reloc_shdr
= p
;
1015 relinfo
.data_shndx
= index
;
1016 relinfo
.data_shdr
= pshdrs
+ index
* This::shdr_size
;
1017 unsigned char* view
= (*pviews
)[index
].view
;
1018 Address address
= (*pviews
)[index
].address
;
1019 section_size_type view_size
= (*pviews
)[index
].view_size
;
1021 Reloc_symbol_changes
* reloc_map
= NULL
;
1022 if (this->uses_split_stack() && output_offset
!= invalid_address
)
1024 typename
This::Shdr
data_shdr(pshdrs
+ index
* This::shdr_size
);
1025 if ((data_shdr
.get_sh_flags() & elfcpp::SHF_EXECINSTR
) != 0)
1026 this->split_stack_adjust(symtab
, pshdrs
, sh_type
, index
,
1027 prelocs
, reloc_count
, view
, view_size
,
1031 Relocatable_relocs
* rr
= NULL
;
1032 if (parameters
->options().emit_relocs()
1033 || parameters
->options().relocatable())
1034 rr
= this->relocatable_relocs(i
);
1037 if (!parameters
->options().relocatable())
1039 target
->relocate_section(&relinfo
, sh_type
, prelocs
, reloc_count
, os
,
1040 output_offset
== invalid_address
,
1041 view
, address
, view_size
, reloc_map
);
1042 if (parameters
->options().emit_relocs())
1043 target
->relocate_relocs(&relinfo
, sh_type
, prelocs
, reloc_count
,
1045 view
, address
, view_size
,
1047 (*pviews
)[i
].view_size
);
1048 if (parameters
->incremental())
1049 this->incremental_relocs_write(&relinfo
, sh_type
, prelocs
,
1050 reloc_count
, os
, output_offset
, of
);
1053 target
->relocate_relocs(&relinfo
, sh_type
, prelocs
, reloc_count
,
1055 view
, address
, view_size
,
1057 (*pviews
)[i
].view_size
);
1061 // Return the output view for section SHNDX.
1063 template<int size
, bool big_endian
>
1064 const unsigned char*
1065 Sized_relobj_file
<size
, big_endian
>::do_get_output_view(
1067 section_size_type
* plen
) const
1069 gold_assert(this->output_views_
!= NULL
);
1070 gold_assert(shndx
< this->output_views_
->size());
1071 const View_size
& v
= (*this->output_views_
)[shndx
];
1072 *plen
= v
.view_size
;
1076 // Write the incremental relocs.
1078 template<int size
, bool big_endian
>
1080 Sized_relobj_file
<size
, big_endian
>::incremental_relocs_write(
1081 const Relocate_info
<size
, big_endian
>* relinfo
,
1082 unsigned int sh_type
,
1083 const unsigned char* prelocs
,
1085 Output_section
* output_section
,
1086 Address output_offset
,
1089 if (sh_type
== elfcpp::SHT_REL
)
1090 this->incremental_relocs_write_reltype
<elfcpp::SHT_REL
>(
1099 gold_assert(sh_type
== elfcpp::SHT_RELA
);
1100 this->incremental_relocs_write_reltype
<elfcpp::SHT_RELA
>(
1110 // Write the incremental relocs, templatized on the type of the
1111 // relocation section.
1113 template<int size
, bool big_endian
>
1114 template<int sh_type
>
1116 Sized_relobj_file
<size
, big_endian
>::incremental_relocs_write_reltype(
1117 const Relocate_info
<size
, big_endian
>* relinfo
,
1118 const unsigned char* prelocs
,
1120 Output_section
* output_section
,
1121 Address output_offset
,
1124 typedef typename Reloc_types
<sh_type
, size
, big_endian
>::Reloc Reloc
;
1125 const unsigned int reloc_size
=
1126 Reloc_types
<sh_type
, size
, big_endian
>::reloc_size
;
1127 const unsigned int sizeof_addr
= size
/ 8;
1128 const unsigned int incr_reloc_size
=
1129 Incremental_relocs_reader
<size
, big_endian
>::reloc_size
;
1131 unsigned int out_shndx
= output_section
->out_shndx();
1133 // Get a view for the .gnu_incremental_relocs section.
1135 Incremental_inputs
* inputs
= relinfo
->layout
->incremental_inputs();
1136 gold_assert(inputs
!= NULL
);
1137 const off_t relocs_off
= inputs
->relocs_section()->offset();
1138 const off_t relocs_size
= inputs
->relocs_section()->data_size();
1139 unsigned char* const view
= of
->get_output_view(relocs_off
, relocs_size
);
1141 for (size_t i
= 0; i
< reloc_count
; ++i
, prelocs
+= reloc_size
)
1143 Reloc
reloc(prelocs
);
1145 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
= reloc
.get_r_info();
1146 const unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
1147 const unsigned int r_type
= elfcpp::elf_r_type
<size
>(r_info
);
1149 if (r_sym
< this->local_symbol_count_
)
1152 // Get the new offset--the location in the output section where
1153 // this relocation should be applied.
1155 Address offset
= reloc
.get_r_offset();
1156 if (output_offset
!= invalid_address
)
1157 offset
+= output_offset
;
1160 section_offset_type sot_offset
=
1161 convert_types
<section_offset_type
, Address
>(offset
);
1162 section_offset_type new_sot_offset
=
1163 output_section
->output_offset(relinfo
->object
,
1164 relinfo
->data_shndx
,
1166 gold_assert(new_sot_offset
!= -1);
1167 offset
+= new_sot_offset
;
1171 typename
elfcpp::Elf_types
<size
>::Elf_Swxword addend
;
1172 if (sh_type
== elfcpp::SHT_RELA
)
1174 Reloc_types
<sh_type
, size
, big_endian
>::get_reloc_addend(&reloc
);
1177 // FIXME: Get the addend for SHT_REL.
1181 // Get the index of the output relocation.
1183 unsigned int reloc_index
=
1184 this->next_incremental_reloc_index(r_sym
- this->local_symbol_count_
);
1186 // Write the relocation.
1188 unsigned char* pov
= view
+ reloc_index
* incr_reloc_size
;
1189 elfcpp::Swap
<32, big_endian
>::writeval(pov
, r_type
);
1190 elfcpp::Swap
<32, big_endian
>::writeval(pov
+ 4, out_shndx
);
1191 elfcpp::Swap
<size
, big_endian
>::writeval(pov
+ 8, offset
);
1192 elfcpp::Swap
<size
, big_endian
>::writeval(pov
+ 8 + sizeof_addr
, addend
);
1193 of
->write_output_view(pov
- view
, incr_reloc_size
, view
);
1197 // Create merge hash tables for the local symbols. These are used to
1198 // speed up relocations.
1200 template<int size
, bool big_endian
>
1202 Sized_relobj_file
<size
, big_endian
>::initialize_input_to_output_maps()
1204 const unsigned int loccount
= this->local_symbol_count_
;
1205 for (unsigned int i
= 1; i
< loccount
; ++i
)
1207 Symbol_value
<size
>& lv(this->local_values_
[i
]);
1208 lv
.initialize_input_to_output_map(this);
1212 // Free merge hash tables for the local symbols.
1214 template<int size
, bool big_endian
>
1216 Sized_relobj_file
<size
, big_endian
>::free_input_to_output_maps()
1218 const unsigned int loccount
= this->local_symbol_count_
;
1219 for (unsigned int i
= 1; i
< loccount
; ++i
)
1221 Symbol_value
<size
>& lv(this->local_values_
[i
]);
1222 lv
.free_input_to_output_map();
1226 // If an object was compiled with -fsplit-stack, this is called to
1227 // check whether any relocations refer to functions defined in objects
1228 // which were not compiled with -fsplit-stack. If they were, then we
1229 // need to apply some target-specific adjustments to request
1230 // additional stack space.
1232 template<int size
, bool big_endian
>
1234 Sized_relobj_file
<size
, big_endian
>::split_stack_adjust(
1235 const Symbol_table
* symtab
,
1236 const unsigned char* pshdrs
,
1237 unsigned int sh_type
,
1239 const unsigned char* prelocs
,
1241 unsigned char* view
,
1242 section_size_type view_size
,
1243 Reloc_symbol_changes
** reloc_map
)
1245 if (sh_type
== elfcpp::SHT_REL
)
1246 this->split_stack_adjust_reltype
<elfcpp::SHT_REL
>(symtab
, pshdrs
, shndx
,
1247 prelocs
, reloc_count
,
1252 gold_assert(sh_type
== elfcpp::SHT_RELA
);
1253 this->split_stack_adjust_reltype
<elfcpp::SHT_RELA
>(symtab
, pshdrs
, shndx
,
1254 prelocs
, reloc_count
,
1260 // Adjust for -fsplit-stack, templatized on the type of the relocation
1263 template<int size
, bool big_endian
>
1264 template<int sh_type
>
1266 Sized_relobj_file
<size
, big_endian
>::split_stack_adjust_reltype(
1267 const Symbol_table
* symtab
,
1268 const unsigned char* pshdrs
,
1270 const unsigned char* prelocs
,
1272 unsigned char* view
,
1273 section_size_type view_size
,
1274 Reloc_symbol_changes
** reloc_map
)
1276 typedef typename Reloc_types
<sh_type
, size
, big_endian
>::Reloc Reltype
;
1277 const int reloc_size
= Reloc_types
<sh_type
, size
, big_endian
>::reloc_size
;
1279 size_t local_count
= this->local_symbol_count();
1281 std::vector
<section_offset_type
> non_split_refs
;
1283 const unsigned char* pr
= prelocs
;
1284 for (size_t i
= 0; i
< reloc_count
; ++i
, pr
+= reloc_size
)
1288 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
= reloc
.get_r_info();
1289 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
1290 if (r_sym
< local_count
)
1293 const Symbol
* gsym
= this->global_symbol(r_sym
);
1294 gold_assert(gsym
!= NULL
);
1295 if (gsym
->is_forwarder())
1296 gsym
= symtab
->resolve_forwards(gsym
);
1298 // See if this relocation refers to a function defined in an
1299 // object compiled without -fsplit-stack. Note that we don't
1300 // care about the type of relocation--this means that in some
1301 // cases we will ask for a large stack unnecessarily, but this
1302 // is not fatal. FIXME: Some targets have symbols which are
1303 // functions but are not type STT_FUNC, e.g., STT_ARM_TFUNC.
1304 if (!gsym
->is_undefined()
1305 && gsym
->source() == Symbol::FROM_OBJECT
1306 && !gsym
->object()->uses_split_stack())
1308 unsigned int r_type
= elfcpp::elf_r_type
<size
>(reloc
.get_r_info());
1309 if (parameters
->target().is_call_to_non_split(gsym
, r_type
))
1311 section_offset_type offset
=
1312 convert_to_section_size_type(reloc
.get_r_offset());
1313 non_split_refs
.push_back(offset
);
1318 if (non_split_refs
.empty())
1321 // At this point, every entry in NON_SPLIT_REFS indicates a
1322 // relocation which refers to a function in an object compiled
1323 // without -fsplit-stack. We now have to convert that list into a
1324 // set of offsets to functions. First, we find all the functions.
1326 Function_offsets function_offsets
;
1327 this->find_functions(pshdrs
, shndx
, &function_offsets
);
1328 if (function_offsets
.empty())
1331 // Now get a list of the function with references to non split-stack
1334 Function_offsets calls_non_split
;
1335 for (std::vector
<section_offset_type
>::const_iterator p
1336 = non_split_refs
.begin();
1337 p
!= non_split_refs
.end();
1340 Function_offsets::const_iterator low
= function_offsets
.lower_bound(*p
);
1341 if (low
== function_offsets
.end())
1343 else if (low
->first
== *p
)
1345 else if (low
== function_offsets
.begin())
1350 calls_non_split
.insert(*low
);
1352 if (calls_non_split
.empty())
1355 // Now we have a set of functions to adjust. The adjustments are
1356 // target specific. Besides changing the output section view
1357 // however, it likes, the target may request a relocation change
1358 // from one global symbol name to another.
1360 for (Function_offsets::const_iterator p
= calls_non_split
.begin();
1361 p
!= calls_non_split
.end();
1366 parameters
->target().calls_non_split(this, shndx
, p
->first
, p
->second
,
1367 view
, view_size
, &from
, &to
);
1370 gold_assert(!to
.empty());
1371 Symbol
* tosym
= NULL
;
1373 // Find relocations in the relevant function which are for
1376 for (size_t i
= 0; i
< reloc_count
; ++i
, pr
+= reloc_size
)
1380 typename
elfcpp::Elf_types
<size
>::Elf_WXword r_info
=
1382 unsigned int r_sym
= elfcpp::elf_r_sym
<size
>(r_info
);
1383 if (r_sym
< local_count
)
1386 section_offset_type offset
=
1387 convert_to_section_size_type(reloc
.get_r_offset());
1388 if (offset
< p
->first
1391 + static_cast<section_offset_type
>(p
->second
))))
1394 const Symbol
* gsym
= this->global_symbol(r_sym
);
1395 if (from
== gsym
->name())
1399 tosym
= symtab
->lookup(to
.c_str());
1402 this->error(_("could not convert call "
1404 from
.c_str(), to
.c_str());
1409 if (*reloc_map
== NULL
)
1410 *reloc_map
= new Reloc_symbol_changes(reloc_count
);
1411 (*reloc_map
)->set(i
, tosym
);
1418 // Find all the function in this object defined in section SHNDX.
1419 // Store their offsets in the section in FUNCTION_OFFSETS.
1421 template<int size
, bool big_endian
>
1423 Sized_relobj_file
<size
, big_endian
>::find_functions(
1424 const unsigned char* pshdrs
,
1426 Sized_relobj_file
<size
, big_endian
>::Function_offsets
* function_offsets
)
1428 // We need to read the symbols to find the functions. If we wanted
1429 // to, we could cache reading the symbols across all sections in the
1431 const unsigned int symtab_shndx
= this->symtab_shndx_
;
1432 typename
This::Shdr
symtabshdr(pshdrs
+ symtab_shndx
* This::shdr_size
);
1433 gold_assert(symtabshdr
.get_sh_type() == elfcpp::SHT_SYMTAB
);
1435 typename
elfcpp::Elf_types
<size
>::Elf_WXword sh_size
=
1436 symtabshdr
.get_sh_size();
1437 const unsigned char* psyms
= this->get_view(symtabshdr
.get_sh_offset(),
1438 sh_size
, true, true);
1440 const int sym_size
= This::sym_size
;
1441 const unsigned int symcount
= sh_size
/ sym_size
;
1442 for (unsigned int i
= 0; i
< symcount
; ++i
, psyms
+= sym_size
)
1444 typename
elfcpp::Sym
<size
, big_endian
> isym(psyms
);
1446 // FIXME: Some targets can have functions which do not have type
1447 // STT_FUNC, e.g., STT_ARM_TFUNC.
1448 if (isym
.get_st_type() != elfcpp::STT_FUNC
1449 || isym
.get_st_size() == 0)
1453 Symbol_location loc
;
1454 loc
.shndx
= this->adjust_sym_shndx(i
, isym
.get_st_shndx(),
1460 loc
.offset
= isym
.get_st_value();
1461 parameters
->target().function_location(&loc
);
1463 if (loc
.shndx
!= shndx
)
1466 section_offset_type value
=
1467 convert_to_section_size_type(loc
.offset
);
1468 section_size_type fnsize
=
1469 convert_to_section_size_type(isym
.get_st_size());
1471 (*function_offsets
)[value
] = fnsize
;
1475 // Reverse the words in a section. Used for .ctors sections mapped to
1476 // .init_array sections. See ctors_sections_in_init_array in
1479 template<int size
, bool big_endian
>
1481 Sized_relobj_file
<size
, big_endian
>::reverse_words(unsigned char* view
,
1482 section_size_type view_size
)
1484 typedef typename
elfcpp::Swap
<size
, big_endian
>::Valtype Valtype
;
1485 Valtype
* vview
= reinterpret_cast<Valtype
*>(view
);
1486 section_size_type vview_size
= view_size
/ (size
/ 8);
1487 for (section_size_type i
= 0; i
< vview_size
/ 2; ++i
)
1489 Valtype tmp
= vview
[i
];
1490 vview
[i
] = vview
[vview_size
- 1 - i
];
1491 vview
[vview_size
- 1 - i
] = tmp
;
1495 // Class Merged_symbol_value.
1499 Merged_symbol_value
<size
>::initialize_input_to_output_map(
1500 const Relobj
* object
,
1501 unsigned int input_shndx
)
1503 object
->initialize_input_to_output_map
<size
>(input_shndx
,
1504 this->output_start_address_
,
1505 &this->output_addresses_
);
1508 // Get the output value corresponding to an input offset if we
1509 // couldn't find it in the hash table.
1512 typename
elfcpp::Elf_types
<size
>::Elf_Addr
1513 Merged_symbol_value
<size
>::value_from_output_section(
1514 const Relobj
* object
,
1515 unsigned int input_shndx
,
1516 typename
elfcpp::Elf_types
<size
>::Elf_Addr input_offset
) const
1518 section_offset_type output_offset
;
1519 bool found
= object
->merge_output_offset(input_shndx
, input_offset
,
1522 // If this assertion fails, it means that some relocation was
1523 // against a portion of an input merge section which we didn't map
1524 // to the output file and we didn't explicitly discard. We should
1525 // always map all portions of input merge sections.
1528 if (output_offset
== -1)
1531 return this->output_start_address_
+ output_offset
;
1534 // Track_relocs methods.
1536 // Initialize the class to track the relocs. This gets the object,
1537 // the reloc section index, and the type of the relocs. This returns
1538 // false if something goes wrong.
1540 template<int size
, bool big_endian
>
1542 Track_relocs
<size
, big_endian
>::initialize(
1544 unsigned int reloc_shndx
,
1545 unsigned int reloc_type
)
1547 // If RELOC_SHNDX is -1U, it means there is more than one reloc
1548 // section for the .eh_frame section. We can't handle that case.
1549 if (reloc_shndx
== -1U)
1552 // If RELOC_SHNDX is 0, there is no reloc section.
1553 if (reloc_shndx
== 0)
1556 // Get the contents of the reloc section.
1557 this->prelocs_
= object
->section_contents(reloc_shndx
, &this->len_
, false);
1559 if (reloc_type
== elfcpp::SHT_REL
)
1560 this->reloc_size_
= elfcpp::Elf_sizes
<size
>::rel_size
;
1561 else if (reloc_type
== elfcpp::SHT_RELA
)
1562 this->reloc_size_
= elfcpp::Elf_sizes
<size
>::rela_size
;
1566 if (this->len_
% this->reloc_size_
!= 0)
1568 object
->error(_("reloc section size %zu is not a multiple of "
1570 static_cast<size_t>(this->len_
),
1578 // Return the offset of the next reloc, or -1 if there isn't one.
1580 template<int size
, bool big_endian
>
1582 Track_relocs
<size
, big_endian
>::next_offset() const
1584 if (this->pos_
>= this->len_
)
1587 // Rel and Rela start out the same, so we can always use Rel to find
1588 // the r_offset value.
1589 elfcpp::Rel
<size
, big_endian
> rel(this->prelocs_
+ this->pos_
);
1590 return rel
.get_r_offset();
1593 // Return the index of the symbol referenced by the next reloc, or -1U
1594 // if there aren't any more relocs.
1596 template<int size
, bool big_endian
>
1598 Track_relocs
<size
, big_endian
>::next_symndx() const
1600 if (this->pos_
>= this->len_
)
1603 // Rel and Rela start out the same, so we can use Rel to find the
1605 elfcpp::Rel
<size
, big_endian
> rel(this->prelocs_
+ this->pos_
);
1606 return elfcpp::elf_r_sym
<size
>(rel
.get_r_info());
1609 // Return the addend of the next reloc, or 0 if there isn't one.
1611 template<int size
, bool big_endian
>
1613 Track_relocs
<size
, big_endian
>::next_addend() const
1615 if (this->pos_
>= this->len_
)
1617 if (this->reloc_size_
== elfcpp::Elf_sizes
<size
>::rel_size
)
1619 elfcpp::Rela
<size
, big_endian
> rela(this->prelocs_
+ this->pos_
);
1620 return rela
.get_r_addend();
1623 // Advance to the next reloc whose r_offset is greater than or equal
1624 // to OFFSET. Return the number of relocs we skip.
1626 template<int size
, bool big_endian
>
1628 Track_relocs
<size
, big_endian
>::advance(off_t offset
)
1631 while (this->pos_
< this->len_
)
1633 // Rel and Rela start out the same, so we can always use Rel to
1634 // find the r_offset value.
1635 elfcpp::Rel
<size
, big_endian
> rel(this->prelocs_
+ this->pos_
);
1636 if (static_cast<off_t
>(rel
.get_r_offset()) >= offset
)
1639 this->pos_
+= this->reloc_size_
;
1644 // Instantiate the templates we need.
1646 #ifdef HAVE_TARGET_32_LITTLE
1649 Sized_relobj_file
<32, false>::do_read_relocs(Read_relocs_data
* rd
);
1652 #ifdef HAVE_TARGET_32_BIG
1655 Sized_relobj_file
<32, true>::do_read_relocs(Read_relocs_data
* rd
);
1658 #ifdef HAVE_TARGET_64_LITTLE
1661 Sized_relobj_file
<64, false>::do_read_relocs(Read_relocs_data
* rd
);
1664 #ifdef HAVE_TARGET_64_BIG
1667 Sized_relobj_file
<64, true>::do_read_relocs(Read_relocs_data
* rd
);
1670 #ifdef HAVE_TARGET_32_LITTLE
1673 Sized_relobj_file
<32, false>::do_gc_process_relocs(Symbol_table
* symtab
,
1675 Read_relocs_data
* rd
);
1678 #ifdef HAVE_TARGET_32_BIG
1681 Sized_relobj_file
<32, true>::do_gc_process_relocs(Symbol_table
* symtab
,
1683 Read_relocs_data
* rd
);
1686 #ifdef HAVE_TARGET_64_LITTLE
1689 Sized_relobj_file
<64, false>::do_gc_process_relocs(Symbol_table
* symtab
,
1691 Read_relocs_data
* rd
);
1694 #ifdef HAVE_TARGET_64_BIG
1697 Sized_relobj_file
<64, true>::do_gc_process_relocs(Symbol_table
* symtab
,
1699 Read_relocs_data
* rd
);
1702 #ifdef HAVE_TARGET_32_LITTLE
1705 Sized_relobj_file
<32, false>::do_scan_relocs(Symbol_table
* symtab
,
1707 Read_relocs_data
* rd
);
1710 #ifdef HAVE_TARGET_32_BIG
1713 Sized_relobj_file
<32, true>::do_scan_relocs(Symbol_table
* symtab
,
1715 Read_relocs_data
* rd
);
1718 #ifdef HAVE_TARGET_64_LITTLE
1721 Sized_relobj_file
<64, false>::do_scan_relocs(Symbol_table
* symtab
,
1723 Read_relocs_data
* rd
);
1726 #ifdef HAVE_TARGET_64_BIG
1729 Sized_relobj_file
<64, true>::do_scan_relocs(Symbol_table
* symtab
,
1731 Read_relocs_data
* rd
);
1734 #ifdef HAVE_TARGET_32_LITTLE
1737 Sized_relobj_file
<32, false>::do_relocate(const Symbol_table
* symtab
,
1738 const Layout
* layout
,
1742 #ifdef HAVE_TARGET_32_BIG
1745 Sized_relobj_file
<32, true>::do_relocate(const Symbol_table
* symtab
,
1746 const Layout
* layout
,
1750 #ifdef HAVE_TARGET_64_LITTLE
1753 Sized_relobj_file
<64, false>::do_relocate(const Symbol_table
* symtab
,
1754 const Layout
* layout
,
1758 #ifdef HAVE_TARGET_64_BIG
1761 Sized_relobj_file
<64, true>::do_relocate(const Symbol_table
* symtab
,
1762 const Layout
* layout
,
1766 #ifdef HAVE_TARGET_32_LITTLE
1769 Sized_relobj_file
<32, false>::do_relocate_sections(
1770 const Symbol_table
* symtab
,
1771 const Layout
* layout
,
1772 const unsigned char* pshdrs
,
1777 const unsigned char*
1778 Sized_relobj_file
<32, false>::do_get_output_view(
1780 section_size_type
* plen
) const;
1783 #ifdef HAVE_TARGET_32_BIG
1786 Sized_relobj_file
<32, true>::do_relocate_sections(
1787 const Symbol_table
* symtab
,
1788 const Layout
* layout
,
1789 const unsigned char* pshdrs
,
1794 const unsigned char*
1795 Sized_relobj_file
<32, true>::do_get_output_view(
1797 section_size_type
* plen
) const;
1800 #ifdef HAVE_TARGET_64_LITTLE
1803 Sized_relobj_file
<64, false>::do_relocate_sections(
1804 const Symbol_table
* symtab
,
1805 const Layout
* layout
,
1806 const unsigned char* pshdrs
,
1811 const unsigned char*
1812 Sized_relobj_file
<64, false>::do_get_output_view(
1814 section_size_type
* plen
) const;
1817 #ifdef HAVE_TARGET_64_BIG
1820 Sized_relobj_file
<64, true>::do_relocate_sections(
1821 const Symbol_table
* symtab
,
1822 const Layout
* layout
,
1823 const unsigned char* pshdrs
,
1828 const unsigned char*
1829 Sized_relobj_file
<64, true>::do_get_output_view(
1831 section_size_type
* plen
) const;
1834 #ifdef HAVE_TARGET_32_LITTLE
1837 Sized_relobj_file
<32, false>::initialize_input_to_output_maps();
1841 Sized_relobj_file
<32, false>::free_input_to_output_maps();
1844 #ifdef HAVE_TARGET_32_BIG
1847 Sized_relobj_file
<32, true>::initialize_input_to_output_maps();
1851 Sized_relobj_file
<32, true>::free_input_to_output_maps();
1854 #ifdef HAVE_TARGET_64_LITTLE
1857 Sized_relobj_file
<64, false>::initialize_input_to_output_maps();
1861 Sized_relobj_file
<64, false>::free_input_to_output_maps();
1864 #ifdef HAVE_TARGET_64_BIG
1867 Sized_relobj_file
<64, true>::initialize_input_to_output_maps();
1871 Sized_relobj_file
<64, true>::free_input_to_output_maps();
1874 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
1876 class Merged_symbol_value
<32>;
1879 #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
1881 class Merged_symbol_value
<64>;
1884 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
1886 class Symbol_value
<32>;
1889 #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
1891 class Symbol_value
<64>;
1894 #ifdef HAVE_TARGET_32_LITTLE
1896 class Track_relocs
<32, false>;
1899 #ifdef HAVE_TARGET_32_BIG
1901 class Track_relocs
<32, true>;
1904 #ifdef HAVE_TARGET_64_LITTLE
1906 class Track_relocs
<64, false>;
1909 #ifdef HAVE_TARGET_64_BIG
1911 class Track_relocs
<64, true>;
1914 } // End namespace gold.