1 // output.cc -- manage the output file for gold
3 // Copyright 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
4 // Written by Ian Lance Taylor <iant@google.com>.
6 // This file is part of gold.
8 // This program is free software; you can redistribute it and/or modify
9 // it under the terms of the GNU General Public License as published by
10 // the Free Software Foundation; either version 3 of the License, or
11 // (at your option) any later version.
13 // This program is distributed in the hope that it will be useful,
14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 // GNU General Public License for more details.
18 // You should have received a copy of the GNU General Public License
19 // along with this program; if not, write to the Free Software
20 // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 // MA 02110-1301, USA.
33 #include "libiberty.h"
35 #include "parameters.h"
40 #include "descriptors.h"
43 // Some BSD systems still use MAP_ANON instead of MAP_ANONYMOUS
45 # define MAP_ANONYMOUS MAP_ANON
48 #ifndef HAVE_POSIX_FALLOCATE
49 // A dummy, non general, version of posix_fallocate. Here we just set
50 // the file size and hope that there is enough disk space. FIXME: We
51 // could allocate disk space by walking block by block and writing a
52 // zero byte into each block.
54 posix_fallocate(int o
, off_t offset
, off_t len
)
56 return ftruncate(o
, offset
+ len
);
58 #endif // !defined(HAVE_POSIX_FALLOCATE)
63 // Output_data variables.
65 bool Output_data::allocated_sizes_are_fixed
;
67 // Output_data methods.
69 Output_data::~Output_data()
73 // Return the default alignment for the target size.
76 Output_data::default_alignment()
78 return Output_data::default_alignment_for_size(
79 parameters
->target().get_size());
82 // Return the default alignment for a size--32 or 64.
85 Output_data::default_alignment_for_size(int size
)
95 // Output_section_header methods. This currently assumes that the
96 // segment and section lists are complete at construction time.
98 Output_section_headers::Output_section_headers(
100 const Layout::Segment_list
* segment_list
,
101 const Layout::Section_list
* section_list
,
102 const Layout::Section_list
* unattached_section_list
,
103 const Stringpool
* secnamepool
,
104 const Output_section
* shstrtab_section
)
106 segment_list_(segment_list
),
107 section_list_(section_list
),
108 unattached_section_list_(unattached_section_list
),
109 secnamepool_(secnamepool
),
110 shstrtab_section_(shstrtab_section
)
114 // Compute the current data size.
117 Output_section_headers::do_size() const
119 // Count all the sections. Start with 1 for the null section.
121 if (!parameters
->options().relocatable())
123 for (Layout::Segment_list::const_iterator p
=
124 this->segment_list_
->begin();
125 p
!= this->segment_list_
->end();
127 if ((*p
)->type() == elfcpp::PT_LOAD
)
128 count
+= (*p
)->output_section_count();
132 for (Layout::Section_list::const_iterator p
=
133 this->section_list_
->begin();
134 p
!= this->section_list_
->end();
136 if (((*p
)->flags() & elfcpp::SHF_ALLOC
) != 0)
139 count
+= this->unattached_section_list_
->size();
141 const int size
= parameters
->target().get_size();
144 shdr_size
= elfcpp::Elf_sizes
<32>::shdr_size
;
146 shdr_size
= elfcpp::Elf_sizes
<64>::shdr_size
;
150 return count
* shdr_size
;
153 // Write out the section headers.
156 Output_section_headers::do_write(Output_file
* of
)
158 switch (parameters
->size_and_endianness())
160 #ifdef HAVE_TARGET_32_LITTLE
161 case Parameters::TARGET_32_LITTLE
:
162 this->do_sized_write
<32, false>(of
);
165 #ifdef HAVE_TARGET_32_BIG
166 case Parameters::TARGET_32_BIG
:
167 this->do_sized_write
<32, true>(of
);
170 #ifdef HAVE_TARGET_64_LITTLE
171 case Parameters::TARGET_64_LITTLE
:
172 this->do_sized_write
<64, false>(of
);
175 #ifdef HAVE_TARGET_64_BIG
176 case Parameters::TARGET_64_BIG
:
177 this->do_sized_write
<64, true>(of
);
185 template<int size
, bool big_endian
>
187 Output_section_headers::do_sized_write(Output_file
* of
)
189 off_t all_shdrs_size
= this->data_size();
190 unsigned char* view
= of
->get_output_view(this->offset(), all_shdrs_size
);
192 const int shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
193 unsigned char* v
= view
;
196 typename
elfcpp::Shdr_write
<size
, big_endian
> oshdr(v
);
197 oshdr
.put_sh_name(0);
198 oshdr
.put_sh_type(elfcpp::SHT_NULL
);
199 oshdr
.put_sh_flags(0);
200 oshdr
.put_sh_addr(0);
201 oshdr
.put_sh_offset(0);
203 size_t section_count
= (this->data_size()
204 / elfcpp::Elf_sizes
<size
>::shdr_size
);
205 if (section_count
< elfcpp::SHN_LORESERVE
)
206 oshdr
.put_sh_size(0);
208 oshdr
.put_sh_size(section_count
);
210 unsigned int shstrndx
= this->shstrtab_section_
->out_shndx();
211 if (shstrndx
< elfcpp::SHN_LORESERVE
)
212 oshdr
.put_sh_link(0);
214 oshdr
.put_sh_link(shstrndx
);
216 oshdr
.put_sh_info(0);
217 oshdr
.put_sh_addralign(0);
218 oshdr
.put_sh_entsize(0);
223 unsigned int shndx
= 1;
224 if (!parameters
->options().relocatable())
226 for (Layout::Segment_list::const_iterator p
=
227 this->segment_list_
->begin();
228 p
!= this->segment_list_
->end();
230 v
= (*p
)->write_section_headers
<size
, big_endian
>(this->layout_
,
237 for (Layout::Section_list::const_iterator p
=
238 this->section_list_
->begin();
239 p
!= this->section_list_
->end();
242 // We do unallocated sections below, except that group
243 // sections have to come first.
244 if (((*p
)->flags() & elfcpp::SHF_ALLOC
) == 0
245 && (*p
)->type() != elfcpp::SHT_GROUP
)
247 gold_assert(shndx
== (*p
)->out_shndx());
248 elfcpp::Shdr_write
<size
, big_endian
> oshdr(v
);
249 (*p
)->write_header(this->layout_
, this->secnamepool_
, &oshdr
);
255 for (Layout::Section_list::const_iterator p
=
256 this->unattached_section_list_
->begin();
257 p
!= this->unattached_section_list_
->end();
260 // For a relocatable link, we did unallocated group sections
261 // above, since they have to come first.
262 if ((*p
)->type() == elfcpp::SHT_GROUP
263 && parameters
->options().relocatable())
265 gold_assert(shndx
== (*p
)->out_shndx());
266 elfcpp::Shdr_write
<size
, big_endian
> oshdr(v
);
267 (*p
)->write_header(this->layout_
, this->secnamepool_
, &oshdr
);
272 of
->write_output_view(this->offset(), all_shdrs_size
, view
);
275 // Output_segment_header methods.
277 Output_segment_headers::Output_segment_headers(
278 const Layout::Segment_list
& segment_list
)
279 : segment_list_(segment_list
)
284 Output_segment_headers::do_write(Output_file
* of
)
286 switch (parameters
->size_and_endianness())
288 #ifdef HAVE_TARGET_32_LITTLE
289 case Parameters::TARGET_32_LITTLE
:
290 this->do_sized_write
<32, false>(of
);
293 #ifdef HAVE_TARGET_32_BIG
294 case Parameters::TARGET_32_BIG
:
295 this->do_sized_write
<32, true>(of
);
298 #ifdef HAVE_TARGET_64_LITTLE
299 case Parameters::TARGET_64_LITTLE
:
300 this->do_sized_write
<64, false>(of
);
303 #ifdef HAVE_TARGET_64_BIG
304 case Parameters::TARGET_64_BIG
:
305 this->do_sized_write
<64, true>(of
);
313 template<int size
, bool big_endian
>
315 Output_segment_headers::do_sized_write(Output_file
* of
)
317 const int phdr_size
= elfcpp::Elf_sizes
<size
>::phdr_size
;
318 off_t all_phdrs_size
= this->segment_list_
.size() * phdr_size
;
319 gold_assert(all_phdrs_size
== this->data_size());
320 unsigned char* view
= of
->get_output_view(this->offset(),
322 unsigned char* v
= view
;
323 for (Layout::Segment_list::const_iterator p
= this->segment_list_
.begin();
324 p
!= this->segment_list_
.end();
327 elfcpp::Phdr_write
<size
, big_endian
> ophdr(v
);
328 (*p
)->write_header(&ophdr
);
332 gold_assert(v
- view
== all_phdrs_size
);
334 of
->write_output_view(this->offset(), all_phdrs_size
, view
);
338 Output_segment_headers::do_size() const
340 const int size
= parameters
->target().get_size();
343 phdr_size
= elfcpp::Elf_sizes
<32>::phdr_size
;
345 phdr_size
= elfcpp::Elf_sizes
<64>::phdr_size
;
349 return this->segment_list_
.size() * phdr_size
;
352 // Output_file_header methods.
354 Output_file_header::Output_file_header(const Target
* target
,
355 const Symbol_table
* symtab
,
356 const Output_segment_headers
* osh
,
360 segment_header_(osh
),
361 section_header_(NULL
),
365 this->set_data_size(this->do_size());
368 // Set the section table information for a file header.
371 Output_file_header::set_section_info(const Output_section_headers
* shdrs
,
372 const Output_section
* shstrtab
)
374 this->section_header_
= shdrs
;
375 this->shstrtab_
= shstrtab
;
378 // Write out the file header.
381 Output_file_header::do_write(Output_file
* of
)
383 gold_assert(this->offset() == 0);
385 switch (parameters
->size_and_endianness())
387 #ifdef HAVE_TARGET_32_LITTLE
388 case Parameters::TARGET_32_LITTLE
:
389 this->do_sized_write
<32, false>(of
);
392 #ifdef HAVE_TARGET_32_BIG
393 case Parameters::TARGET_32_BIG
:
394 this->do_sized_write
<32, true>(of
);
397 #ifdef HAVE_TARGET_64_LITTLE
398 case Parameters::TARGET_64_LITTLE
:
399 this->do_sized_write
<64, false>(of
);
402 #ifdef HAVE_TARGET_64_BIG
403 case Parameters::TARGET_64_BIG
:
404 this->do_sized_write
<64, true>(of
);
412 // Write out the file header with appropriate size and endianess.
414 template<int size
, bool big_endian
>
416 Output_file_header::do_sized_write(Output_file
* of
)
418 gold_assert(this->offset() == 0);
420 int ehdr_size
= elfcpp::Elf_sizes
<size
>::ehdr_size
;
421 unsigned char* view
= of
->get_output_view(0, ehdr_size
);
422 elfcpp::Ehdr_write
<size
, big_endian
> oehdr(view
);
424 unsigned char e_ident
[elfcpp::EI_NIDENT
];
425 memset(e_ident
, 0, elfcpp::EI_NIDENT
);
426 e_ident
[elfcpp::EI_MAG0
] = elfcpp::ELFMAG0
;
427 e_ident
[elfcpp::EI_MAG1
] = elfcpp::ELFMAG1
;
428 e_ident
[elfcpp::EI_MAG2
] = elfcpp::ELFMAG2
;
429 e_ident
[elfcpp::EI_MAG3
] = elfcpp::ELFMAG3
;
431 e_ident
[elfcpp::EI_CLASS
] = elfcpp::ELFCLASS32
;
433 e_ident
[elfcpp::EI_CLASS
] = elfcpp::ELFCLASS64
;
436 e_ident
[elfcpp::EI_DATA
] = (big_endian
437 ? elfcpp::ELFDATA2MSB
438 : elfcpp::ELFDATA2LSB
);
439 e_ident
[elfcpp::EI_VERSION
] = elfcpp::EV_CURRENT
;
440 oehdr
.put_e_ident(e_ident
);
443 if (parameters
->options().relocatable())
444 e_type
= elfcpp::ET_REL
;
445 else if (parameters
->options().output_is_position_independent())
446 e_type
= elfcpp::ET_DYN
;
448 e_type
= elfcpp::ET_EXEC
;
449 oehdr
.put_e_type(e_type
);
451 oehdr
.put_e_machine(this->target_
->machine_code());
452 oehdr
.put_e_version(elfcpp::EV_CURRENT
);
454 oehdr
.put_e_entry(this->entry
<size
>());
456 if (this->segment_header_
== NULL
)
457 oehdr
.put_e_phoff(0);
459 oehdr
.put_e_phoff(this->segment_header_
->offset());
461 oehdr
.put_e_shoff(this->section_header_
->offset());
463 // FIXME: The target needs to set the flags.
464 oehdr
.put_e_flags(0);
466 oehdr
.put_e_ehsize(elfcpp::Elf_sizes
<size
>::ehdr_size
);
468 if (this->segment_header_
== NULL
)
470 oehdr
.put_e_phentsize(0);
471 oehdr
.put_e_phnum(0);
475 oehdr
.put_e_phentsize(elfcpp::Elf_sizes
<size
>::phdr_size
);
476 oehdr
.put_e_phnum(this->segment_header_
->data_size()
477 / elfcpp::Elf_sizes
<size
>::phdr_size
);
480 oehdr
.put_e_shentsize(elfcpp::Elf_sizes
<size
>::shdr_size
);
481 size_t section_count
= (this->section_header_
->data_size()
482 / elfcpp::Elf_sizes
<size
>::shdr_size
);
484 if (section_count
< elfcpp::SHN_LORESERVE
)
485 oehdr
.put_e_shnum(this->section_header_
->data_size()
486 / elfcpp::Elf_sizes
<size
>::shdr_size
);
488 oehdr
.put_e_shnum(0);
490 unsigned int shstrndx
= this->shstrtab_
->out_shndx();
491 if (shstrndx
< elfcpp::SHN_LORESERVE
)
492 oehdr
.put_e_shstrndx(this->shstrtab_
->out_shndx());
494 oehdr
.put_e_shstrndx(elfcpp::SHN_XINDEX
);
496 // Let the target adjust the ELF header, e.g., to set EI_OSABI in
497 // the e_ident field.
498 parameters
->target().adjust_elf_header(view
, ehdr_size
);
500 of
->write_output_view(0, ehdr_size
, view
);
503 // Return the value to use for the entry address. THIS->ENTRY_ is the
504 // symbol specified on the command line, if any.
507 typename
elfcpp::Elf_types
<size
>::Elf_Addr
508 Output_file_header::entry()
510 const bool should_issue_warning
= (this->entry_
!= NULL
511 && !parameters
->options().relocatable()
512 && !parameters
->options().shared());
514 // FIXME: Need to support target specific entry symbol.
515 const char* entry
= this->entry_
;
519 Symbol
* sym
= this->symtab_
->lookup(entry
);
521 typename Sized_symbol
<size
>::Value_type v
;
524 Sized_symbol
<size
>* ssym
;
525 ssym
= this->symtab_
->get_sized_symbol
<size
>(sym
);
526 if (!ssym
->is_defined() && should_issue_warning
)
527 gold_warning("entry symbol '%s' exists but is not defined", entry
);
532 // We couldn't find the entry symbol. See if we can parse it as
533 // a number. This supports, e.g., -e 0x1000.
535 v
= strtoull(entry
, &endptr
, 0);
538 if (should_issue_warning
)
539 gold_warning("cannot find entry symbol '%s'", entry
);
547 // Compute the current data size.
550 Output_file_header::do_size() const
552 const int size
= parameters
->target().get_size();
554 return elfcpp::Elf_sizes
<32>::ehdr_size
;
556 return elfcpp::Elf_sizes
<64>::ehdr_size
;
561 // Output_data_const methods.
564 Output_data_const::do_write(Output_file
* of
)
566 of
->write(this->offset(), this->data_
.data(), this->data_
.size());
569 // Output_data_const_buffer methods.
572 Output_data_const_buffer::do_write(Output_file
* of
)
574 of
->write(this->offset(), this->p_
, this->data_size());
577 // Output_section_data methods.
579 // Record the output section, and set the entry size and such.
582 Output_section_data::set_output_section(Output_section
* os
)
584 gold_assert(this->output_section_
== NULL
);
585 this->output_section_
= os
;
586 this->do_adjust_output_section(os
);
589 // Return the section index of the output section.
592 Output_section_data::do_out_shndx() const
594 gold_assert(this->output_section_
!= NULL
);
595 return this->output_section_
->out_shndx();
598 // Set the alignment, which means we may need to update the alignment
599 // of the output section.
602 Output_section_data::set_addralign(uint64_t addralign
)
604 this->addralign_
= addralign
;
605 if (this->output_section_
!= NULL
606 && this->output_section_
->addralign() < addralign
)
607 this->output_section_
->set_addralign(addralign
);
610 // Output_data_strtab methods.
612 // Set the final data size.
615 Output_data_strtab::set_final_data_size()
617 this->strtab_
->set_string_offsets();
618 this->set_data_size(this->strtab_
->get_strtab_size());
621 // Write out a string table.
624 Output_data_strtab::do_write(Output_file
* of
)
626 this->strtab_
->write(of
, this->offset());
629 // Output_reloc methods.
631 // A reloc against a global symbol.
633 template<bool dynamic
, int size
, bool big_endian
>
634 Output_reloc
<elfcpp::SHT_REL
, dynamic
, size
, big_endian
>::Output_reloc(
640 : address_(address
), local_sym_index_(GSYM_CODE
), type_(type
),
641 is_relative_(is_relative
), is_section_symbol_(false), shndx_(INVALID_CODE
)
643 // this->type_ is a bitfield; make sure TYPE fits.
644 gold_assert(this->type_
== type
);
645 this->u1_
.gsym
= gsym
;
648 this->set_needs_dynsym_index();
651 template<bool dynamic
, int size
, bool big_endian
>
652 Output_reloc
<elfcpp::SHT_REL
, dynamic
, size
, big_endian
>::Output_reloc(
655 Sized_relobj
<size
, big_endian
>* relobj
,
659 : address_(address
), local_sym_index_(GSYM_CODE
), type_(type
),
660 is_relative_(is_relative
), is_section_symbol_(false), shndx_(shndx
)
662 gold_assert(shndx
!= INVALID_CODE
);
663 // this->type_ is a bitfield; make sure TYPE fits.
664 gold_assert(this->type_
== type
);
665 this->u1_
.gsym
= gsym
;
666 this->u2_
.relobj
= relobj
;
668 this->set_needs_dynsym_index();
671 // A reloc against a local symbol.
673 template<bool dynamic
, int size
, bool big_endian
>
674 Output_reloc
<elfcpp::SHT_REL
, dynamic
, size
, big_endian
>::Output_reloc(
675 Sized_relobj
<size
, big_endian
>* relobj
,
676 unsigned int local_sym_index
,
681 bool is_section_symbol
)
682 : address_(address
), local_sym_index_(local_sym_index
), type_(type
),
683 is_relative_(is_relative
), is_section_symbol_(is_section_symbol
),
686 gold_assert(local_sym_index
!= GSYM_CODE
687 && local_sym_index
!= INVALID_CODE
);
688 // this->type_ is a bitfield; make sure TYPE fits.
689 gold_assert(this->type_
== type
);
690 this->u1_
.relobj
= relobj
;
693 this->set_needs_dynsym_index();
696 template<bool dynamic
, int size
, bool big_endian
>
697 Output_reloc
<elfcpp::SHT_REL
, dynamic
, size
, big_endian
>::Output_reloc(
698 Sized_relobj
<size
, big_endian
>* relobj
,
699 unsigned int local_sym_index
,
704 bool is_section_symbol
)
705 : address_(address
), local_sym_index_(local_sym_index
), type_(type
),
706 is_relative_(is_relative
), is_section_symbol_(is_section_symbol
),
709 gold_assert(local_sym_index
!= GSYM_CODE
710 && local_sym_index
!= INVALID_CODE
);
711 gold_assert(shndx
!= INVALID_CODE
);
712 // this->type_ is a bitfield; make sure TYPE fits.
713 gold_assert(this->type_
== type
);
714 this->u1_
.relobj
= relobj
;
715 this->u2_
.relobj
= relobj
;
717 this->set_needs_dynsym_index();
720 // A reloc against the STT_SECTION symbol of an output section.
722 template<bool dynamic
, int size
, bool big_endian
>
723 Output_reloc
<elfcpp::SHT_REL
, dynamic
, size
, big_endian
>::Output_reloc(
728 : address_(address
), local_sym_index_(SECTION_CODE
), type_(type
),
729 is_relative_(false), is_section_symbol_(true), shndx_(INVALID_CODE
)
731 // this->type_ is a bitfield; make sure TYPE fits.
732 gold_assert(this->type_
== type
);
736 this->set_needs_dynsym_index();
738 os
->set_needs_symtab_index();
741 template<bool dynamic
, int size
, bool big_endian
>
742 Output_reloc
<elfcpp::SHT_REL
, dynamic
, size
, big_endian
>::Output_reloc(
745 Sized_relobj
<size
, big_endian
>* relobj
,
748 : address_(address
), local_sym_index_(SECTION_CODE
), type_(type
),
749 is_relative_(false), is_section_symbol_(true), shndx_(shndx
)
751 gold_assert(shndx
!= INVALID_CODE
);
752 // this->type_ is a bitfield; make sure TYPE fits.
753 gold_assert(this->type_
== type
);
755 this->u2_
.relobj
= relobj
;
757 this->set_needs_dynsym_index();
759 os
->set_needs_symtab_index();
762 // Record that we need a dynamic symbol index for this relocation.
764 template<bool dynamic
, int size
, bool big_endian
>
766 Output_reloc
<elfcpp::SHT_REL
, dynamic
, size
, big_endian
>::
767 set_needs_dynsym_index()
769 if (this->is_relative_
)
771 switch (this->local_sym_index_
)
777 this->u1_
.gsym
->set_needs_dynsym_entry();
781 this->u1_
.os
->set_needs_dynsym_index();
789 const unsigned int lsi
= this->local_sym_index_
;
790 if (!this->is_section_symbol_
)
791 this->u1_
.relobj
->set_needs_output_dynsym_entry(lsi
);
793 this->u1_
.relobj
->output_section(lsi
)->set_needs_dynsym_index();
799 // Get the symbol index of a relocation.
801 template<bool dynamic
, int size
, bool big_endian
>
803 Output_reloc
<elfcpp::SHT_REL
, dynamic
, size
, big_endian
>::get_symbol_index()
807 switch (this->local_sym_index_
)
813 if (this->u1_
.gsym
== NULL
)
816 index
= this->u1_
.gsym
->dynsym_index();
818 index
= this->u1_
.gsym
->symtab_index();
823 index
= this->u1_
.os
->dynsym_index();
825 index
= this->u1_
.os
->symtab_index();
829 // Relocations without symbols use a symbol index of 0.
835 const unsigned int lsi
= this->local_sym_index_
;
836 if (!this->is_section_symbol_
)
839 index
= this->u1_
.relobj
->dynsym_index(lsi
);
841 index
= this->u1_
.relobj
->symtab_index(lsi
);
845 Output_section
* os
= this->u1_
.relobj
->output_section(lsi
);
846 gold_assert(os
!= NULL
);
848 index
= os
->dynsym_index();
850 index
= os
->symtab_index();
855 gold_assert(index
!= -1U);
859 // For a local section symbol, get the address of the offset ADDEND
860 // within the input section.
862 template<bool dynamic
, int size
, bool big_endian
>
863 typename
elfcpp::Elf_types
<size
>::Elf_Addr
864 Output_reloc
<elfcpp::SHT_REL
, dynamic
, size
, big_endian
>::
865 local_section_offset(Addend addend
) const
867 gold_assert(this->local_sym_index_
!= GSYM_CODE
868 && this->local_sym_index_
!= SECTION_CODE
869 && this->local_sym_index_
!= INVALID_CODE
870 && this->is_section_symbol_
);
871 const unsigned int lsi
= this->local_sym_index_
;
872 Output_section
* os
= this->u1_
.relobj
->output_section(lsi
);
873 gold_assert(os
!= NULL
);
874 Address offset
= this->u1_
.relobj
->get_output_section_offset(lsi
);
875 if (offset
!= invalid_address
)
876 return offset
+ addend
;
877 // This is a merge section.
878 offset
= os
->output_address(this->u1_
.relobj
, lsi
, addend
);
879 gold_assert(offset
!= invalid_address
);
883 // Get the output address of a relocation.
885 template<bool dynamic
, int size
, bool big_endian
>
886 typename
elfcpp::Elf_types
<size
>::Elf_Addr
887 Output_reloc
<elfcpp::SHT_REL
, dynamic
, size
, big_endian
>::get_address() const
889 Address address
= this->address_
;
890 if (this->shndx_
!= INVALID_CODE
)
892 Output_section
* os
= this->u2_
.relobj
->output_section(this->shndx_
);
893 gold_assert(os
!= NULL
);
894 Address off
= this->u2_
.relobj
->get_output_section_offset(this->shndx_
);
895 if (off
!= invalid_address
)
896 address
+= os
->address() + off
;
899 address
= os
->output_address(this->u2_
.relobj
, this->shndx_
,
901 gold_assert(address
!= invalid_address
);
904 else if (this->u2_
.od
!= NULL
)
905 address
+= this->u2_
.od
->address();
909 // Write out the offset and info fields of a Rel or Rela relocation
912 template<bool dynamic
, int size
, bool big_endian
>
913 template<typename Write_rel
>
915 Output_reloc
<elfcpp::SHT_REL
, dynamic
, size
, big_endian
>::write_rel(
918 wr
->put_r_offset(this->get_address());
919 unsigned int sym_index
= this->is_relative_
? 0 : this->get_symbol_index();
920 wr
->put_r_info(elfcpp::elf_r_info
<size
>(sym_index
, this->type_
));
923 // Write out a Rel relocation.
925 template<bool dynamic
, int size
, bool big_endian
>
927 Output_reloc
<elfcpp::SHT_REL
, dynamic
, size
, big_endian
>::write(
928 unsigned char* pov
) const
930 elfcpp::Rel_write
<size
, big_endian
> orel(pov
);
931 this->write_rel(&orel
);
934 // Get the value of the symbol referred to by a Rel relocation.
936 template<bool dynamic
, int size
, bool big_endian
>
937 typename
elfcpp::Elf_types
<size
>::Elf_Addr
938 Output_reloc
<elfcpp::SHT_REL
, dynamic
, size
, big_endian
>::symbol_value(
941 if (this->local_sym_index_
== GSYM_CODE
)
943 const Sized_symbol
<size
>* sym
;
944 sym
= static_cast<const Sized_symbol
<size
>*>(this->u1_
.gsym
);
945 return sym
->value() + addend
;
947 gold_assert(this->local_sym_index_
!= SECTION_CODE
948 && this->local_sym_index_
!= INVALID_CODE
949 && !this->is_section_symbol_
);
950 const unsigned int lsi
= this->local_sym_index_
;
951 const Symbol_value
<size
>* symval
= this->u1_
.relobj
->local_symbol(lsi
);
952 return symval
->value(this->u1_
.relobj
, addend
);
955 // Reloc comparison. This function sorts the dynamic relocs for the
956 // benefit of the dynamic linker. First we sort all relative relocs
957 // to the front. Among relative relocs, we sort by output address.
958 // Among non-relative relocs, we sort by symbol index, then by output
961 template<bool dynamic
, int size
, bool big_endian
>
963 Output_reloc
<elfcpp::SHT_REL
, dynamic
, size
, big_endian
>::
964 compare(const Output_reloc
<elfcpp::SHT_REL
, dynamic
, size
, big_endian
>& r2
)
967 if (this->is_relative_
)
969 if (!r2
.is_relative_
)
971 // Otherwise sort by reloc address below.
973 else if (r2
.is_relative_
)
977 unsigned int sym1
= this->get_symbol_index();
978 unsigned int sym2
= r2
.get_symbol_index();
981 else if (sym1
> sym2
)
983 // Otherwise sort by reloc address.
986 section_offset_type addr1
= this->get_address();
987 section_offset_type addr2
= r2
.get_address();
990 else if (addr1
> addr2
)
993 // Final tie breaker, in order to generate the same output on any
995 unsigned int type1
= this->type_
;
996 unsigned int type2
= r2
.type_
;
999 else if (type1
> type2
)
1002 // These relocs appear to be exactly the same.
1006 // Write out a Rela relocation.
1008 template<bool dynamic
, int size
, bool big_endian
>
1010 Output_reloc
<elfcpp::SHT_RELA
, dynamic
, size
, big_endian
>::write(
1011 unsigned char* pov
) const
1013 elfcpp::Rela_write
<size
, big_endian
> orel(pov
);
1014 this->rel_
.write_rel(&orel
);
1015 Addend addend
= this->addend_
;
1016 if (this->rel_
.is_relative())
1017 addend
= this->rel_
.symbol_value(addend
);
1018 else if (this->rel_
.is_local_section_symbol())
1019 addend
= this->rel_
.local_section_offset(addend
);
1020 orel
.put_r_addend(addend
);
1023 // Output_data_reloc_base methods.
1025 // Adjust the output section.
1027 template<int sh_type
, bool dynamic
, int size
, bool big_endian
>
1029 Output_data_reloc_base
<sh_type
, dynamic
, size
, big_endian
>
1030 ::do_adjust_output_section(Output_section
* os
)
1032 if (sh_type
== elfcpp::SHT_REL
)
1033 os
->set_entsize(elfcpp::Elf_sizes
<size
>::rel_size
);
1034 else if (sh_type
== elfcpp::SHT_RELA
)
1035 os
->set_entsize(elfcpp::Elf_sizes
<size
>::rela_size
);
1039 os
->set_should_link_to_dynsym();
1041 os
->set_should_link_to_symtab();
1044 // Write out relocation data.
1046 template<int sh_type
, bool dynamic
, int size
, bool big_endian
>
1048 Output_data_reloc_base
<sh_type
, dynamic
, size
, big_endian
>::do_write(
1051 const off_t off
= this->offset();
1052 const off_t oview_size
= this->data_size();
1053 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
1055 if (this->sort_relocs_
)
1057 gold_assert(dynamic
);
1058 std::sort(this->relocs_
.begin(), this->relocs_
.end(),
1059 Sort_relocs_comparison());
1062 unsigned char* pov
= oview
;
1063 for (typename
Relocs::const_iterator p
= this->relocs_
.begin();
1064 p
!= this->relocs_
.end();
1071 gold_assert(pov
- oview
== oview_size
);
1073 of
->write_output_view(off
, oview_size
, oview
);
1075 // We no longer need the relocation entries.
1076 this->relocs_
.clear();
1079 // Class Output_relocatable_relocs.
1081 template<int sh_type
, int size
, bool big_endian
>
1083 Output_relocatable_relocs
<sh_type
, size
, big_endian
>::set_final_data_size()
1085 this->set_data_size(this->rr_
->output_reloc_count()
1086 * Reloc_types
<sh_type
, size
, big_endian
>::reloc_size
);
1089 // class Output_data_group.
1091 template<int size
, bool big_endian
>
1092 Output_data_group
<size
, big_endian
>::Output_data_group(
1093 Sized_relobj
<size
, big_endian
>* relobj
,
1094 section_size_type entry_count
,
1095 elfcpp::Elf_Word flags
,
1096 std::vector
<unsigned int>* input_shndxes
)
1097 : Output_section_data(entry_count
* 4, 4, false),
1101 this->input_shndxes_
.swap(*input_shndxes
);
1104 // Write out the section group, which means translating the section
1105 // indexes to apply to the output file.
1107 template<int size
, bool big_endian
>
1109 Output_data_group
<size
, big_endian
>::do_write(Output_file
* of
)
1111 const off_t off
= this->offset();
1112 const section_size_type oview_size
=
1113 convert_to_section_size_type(this->data_size());
1114 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
1116 elfcpp::Elf_Word
* contents
= reinterpret_cast<elfcpp::Elf_Word
*>(oview
);
1117 elfcpp::Swap
<32, big_endian
>::writeval(contents
, this->flags_
);
1120 for (std::vector
<unsigned int>::const_iterator p
=
1121 this->input_shndxes_
.begin();
1122 p
!= this->input_shndxes_
.end();
1125 Output_section
* os
= this->relobj_
->output_section(*p
);
1127 unsigned int output_shndx
;
1129 output_shndx
= os
->out_shndx();
1132 this->relobj_
->error(_("section group retained but "
1133 "group element discarded"));
1137 elfcpp::Swap
<32, big_endian
>::writeval(contents
, output_shndx
);
1140 size_t wrote
= reinterpret_cast<unsigned char*>(contents
) - oview
;
1141 gold_assert(wrote
== oview_size
);
1143 of
->write_output_view(off
, oview_size
, oview
);
1145 // We no longer need this information.
1146 this->input_shndxes_
.clear();
1149 // Output_data_got::Got_entry methods.
1151 // Write out the entry.
1153 template<int size
, bool big_endian
>
1155 Output_data_got
<size
, big_endian
>::Got_entry::write(unsigned char* pov
) const
1159 switch (this->local_sym_index_
)
1163 // If the symbol is resolved locally, we need to write out the
1164 // link-time value, which will be relocated dynamically by a
1165 // RELATIVE relocation.
1166 Symbol
* gsym
= this->u_
.gsym
;
1167 Sized_symbol
<size
>* sgsym
;
1168 // This cast is a bit ugly. We don't want to put a
1169 // virtual method in Symbol, because we want Symbol to be
1170 // as small as possible.
1171 sgsym
= static_cast<Sized_symbol
<size
>*>(gsym
);
1172 val
= sgsym
->value();
1177 val
= this->u_
.constant
;
1182 const unsigned int lsi
= this->local_sym_index_
;
1183 const Symbol_value
<size
>* symval
= this->u_
.object
->local_symbol(lsi
);
1184 val
= symval
->value(this->u_
.object
, 0);
1189 elfcpp::Swap
<size
, big_endian
>::writeval(pov
, val
);
1192 // Output_data_got methods.
1194 // Add an entry for a global symbol to the GOT. This returns true if
1195 // this is a new GOT entry, false if the symbol already had a GOT
1198 template<int size
, bool big_endian
>
1200 Output_data_got
<size
, big_endian
>::add_global(
1202 unsigned int got_type
)
1204 if (gsym
->has_got_offset(got_type
))
1207 this->entries_
.push_back(Got_entry(gsym
));
1208 this->set_got_size();
1209 gsym
->set_got_offset(got_type
, this->last_got_offset());
1213 // Add an entry for a global symbol to the GOT, and add a dynamic
1214 // relocation of type R_TYPE for the GOT entry.
1215 template<int size
, bool big_endian
>
1217 Output_data_got
<size
, big_endian
>::add_global_with_rel(
1219 unsigned int got_type
,
1221 unsigned int r_type
)
1223 if (gsym
->has_got_offset(got_type
))
1226 this->entries_
.push_back(Got_entry());
1227 this->set_got_size();
1228 unsigned int got_offset
= this->last_got_offset();
1229 gsym
->set_got_offset(got_type
, got_offset
);
1230 rel_dyn
->add_global(gsym
, r_type
, this, got_offset
);
1233 template<int size
, bool big_endian
>
1235 Output_data_got
<size
, big_endian
>::add_global_with_rela(
1237 unsigned int got_type
,
1239 unsigned int r_type
)
1241 if (gsym
->has_got_offset(got_type
))
1244 this->entries_
.push_back(Got_entry());
1245 this->set_got_size();
1246 unsigned int got_offset
= this->last_got_offset();
1247 gsym
->set_got_offset(got_type
, got_offset
);
1248 rela_dyn
->add_global(gsym
, r_type
, this, got_offset
, 0);
1251 // Add a pair of entries for a global symbol to the GOT, and add
1252 // dynamic relocations of type R_TYPE_1 and R_TYPE_2, respectively.
1253 // If R_TYPE_2 == 0, add the second entry with no relocation.
1254 template<int size
, bool big_endian
>
1256 Output_data_got
<size
, big_endian
>::add_global_pair_with_rel(
1258 unsigned int got_type
,
1260 unsigned int r_type_1
,
1261 unsigned int r_type_2
)
1263 if (gsym
->has_got_offset(got_type
))
1266 this->entries_
.push_back(Got_entry());
1267 unsigned int got_offset
= this->last_got_offset();
1268 gsym
->set_got_offset(got_type
, got_offset
);
1269 rel_dyn
->add_global(gsym
, r_type_1
, this, got_offset
);
1271 this->entries_
.push_back(Got_entry());
1274 got_offset
= this->last_got_offset();
1275 rel_dyn
->add_global(gsym
, r_type_2
, this, got_offset
);
1278 this->set_got_size();
1281 template<int size
, bool big_endian
>
1283 Output_data_got
<size
, big_endian
>::add_global_pair_with_rela(
1285 unsigned int got_type
,
1287 unsigned int r_type_1
,
1288 unsigned int r_type_2
)
1290 if (gsym
->has_got_offset(got_type
))
1293 this->entries_
.push_back(Got_entry());
1294 unsigned int got_offset
= this->last_got_offset();
1295 gsym
->set_got_offset(got_type
, got_offset
);
1296 rela_dyn
->add_global(gsym
, r_type_1
, this, got_offset
, 0);
1298 this->entries_
.push_back(Got_entry());
1301 got_offset
= this->last_got_offset();
1302 rela_dyn
->add_global(gsym
, r_type_2
, this, got_offset
, 0);
1305 this->set_got_size();
1308 // Add an entry for a local symbol to the GOT. This returns true if
1309 // this is a new GOT entry, false if the symbol already has a GOT
1312 template<int size
, bool big_endian
>
1314 Output_data_got
<size
, big_endian
>::add_local(
1315 Sized_relobj
<size
, big_endian
>* object
,
1316 unsigned int symndx
,
1317 unsigned int got_type
)
1319 if (object
->local_has_got_offset(symndx
, got_type
))
1322 this->entries_
.push_back(Got_entry(object
, symndx
));
1323 this->set_got_size();
1324 object
->set_local_got_offset(symndx
, got_type
, this->last_got_offset());
1328 // Add an entry for a local symbol to the GOT, and add a dynamic
1329 // relocation of type R_TYPE for the GOT entry.
1330 template<int size
, bool big_endian
>
1332 Output_data_got
<size
, big_endian
>::add_local_with_rel(
1333 Sized_relobj
<size
, big_endian
>* object
,
1334 unsigned int symndx
,
1335 unsigned int got_type
,
1337 unsigned int r_type
)
1339 if (object
->local_has_got_offset(symndx
, got_type
))
1342 this->entries_
.push_back(Got_entry());
1343 this->set_got_size();
1344 unsigned int got_offset
= this->last_got_offset();
1345 object
->set_local_got_offset(symndx
, got_type
, got_offset
);
1346 rel_dyn
->add_local(object
, symndx
, r_type
, this, got_offset
);
1349 template<int size
, bool big_endian
>
1351 Output_data_got
<size
, big_endian
>::add_local_with_rela(
1352 Sized_relobj
<size
, big_endian
>* object
,
1353 unsigned int symndx
,
1354 unsigned int got_type
,
1356 unsigned int r_type
)
1358 if (object
->local_has_got_offset(symndx
, got_type
))
1361 this->entries_
.push_back(Got_entry());
1362 this->set_got_size();
1363 unsigned int got_offset
= this->last_got_offset();
1364 object
->set_local_got_offset(symndx
, got_type
, got_offset
);
1365 rela_dyn
->add_local(object
, symndx
, r_type
, this, got_offset
, 0);
1368 // Add a pair of entries for a local symbol to the GOT, and add
1369 // dynamic relocations of type R_TYPE_1 and R_TYPE_2, respectively.
1370 // If R_TYPE_2 == 0, add the second entry with no relocation.
1371 template<int size
, bool big_endian
>
1373 Output_data_got
<size
, big_endian
>::add_local_pair_with_rel(
1374 Sized_relobj
<size
, big_endian
>* object
,
1375 unsigned int symndx
,
1377 unsigned int got_type
,
1379 unsigned int r_type_1
,
1380 unsigned int r_type_2
)
1382 if (object
->local_has_got_offset(symndx
, got_type
))
1385 this->entries_
.push_back(Got_entry());
1386 unsigned int got_offset
= this->last_got_offset();
1387 object
->set_local_got_offset(symndx
, got_type
, got_offset
);
1388 Output_section
* os
= object
->output_section(shndx
);
1389 rel_dyn
->add_output_section(os
, r_type_1
, this, got_offset
);
1391 this->entries_
.push_back(Got_entry(object
, symndx
));
1394 got_offset
= this->last_got_offset();
1395 rel_dyn
->add_output_section(os
, r_type_2
, this, got_offset
);
1398 this->set_got_size();
1401 template<int size
, bool big_endian
>
1403 Output_data_got
<size
, big_endian
>::add_local_pair_with_rela(
1404 Sized_relobj
<size
, big_endian
>* object
,
1405 unsigned int symndx
,
1407 unsigned int got_type
,
1409 unsigned int r_type_1
,
1410 unsigned int r_type_2
)
1412 if (object
->local_has_got_offset(symndx
, got_type
))
1415 this->entries_
.push_back(Got_entry());
1416 unsigned int got_offset
= this->last_got_offset();
1417 object
->set_local_got_offset(symndx
, got_type
, got_offset
);
1418 Output_section
* os
= object
->output_section(shndx
);
1419 rela_dyn
->add_output_section(os
, r_type_1
, this, got_offset
, 0);
1421 this->entries_
.push_back(Got_entry(object
, symndx
));
1424 got_offset
= this->last_got_offset();
1425 rela_dyn
->add_output_section(os
, r_type_2
, this, got_offset
, 0);
1428 this->set_got_size();
1431 // Write out the GOT.
1433 template<int size
, bool big_endian
>
1435 Output_data_got
<size
, big_endian
>::do_write(Output_file
* of
)
1437 const int add
= size
/ 8;
1439 const off_t off
= this->offset();
1440 const off_t oview_size
= this->data_size();
1441 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
1443 unsigned char* pov
= oview
;
1444 for (typename
Got_entries::const_iterator p
= this->entries_
.begin();
1445 p
!= this->entries_
.end();
1452 gold_assert(pov
- oview
== oview_size
);
1454 of
->write_output_view(off
, oview_size
, oview
);
1456 // We no longer need the GOT entries.
1457 this->entries_
.clear();
1460 // Output_data_dynamic::Dynamic_entry methods.
1462 // Write out the entry.
1464 template<int size
, bool big_endian
>
1466 Output_data_dynamic::Dynamic_entry::write(
1468 const Stringpool
* pool
) const
1470 typename
elfcpp::Elf_types
<size
>::Elf_WXword val
;
1471 switch (this->offset_
)
1473 case DYNAMIC_NUMBER
:
1477 case DYNAMIC_SECTION_SIZE
:
1478 val
= this->u_
.od
->data_size();
1481 case DYNAMIC_SYMBOL
:
1483 const Sized_symbol
<size
>* s
=
1484 static_cast<const Sized_symbol
<size
>*>(this->u_
.sym
);
1489 case DYNAMIC_STRING
:
1490 val
= pool
->get_offset(this->u_
.str
);
1494 val
= this->u_
.od
->address() + this->offset_
;
1498 elfcpp::Dyn_write
<size
, big_endian
> dw(pov
);
1499 dw
.put_d_tag(this->tag_
);
1503 // Output_data_dynamic methods.
1505 // Adjust the output section to set the entry size.
1508 Output_data_dynamic::do_adjust_output_section(Output_section
* os
)
1510 if (parameters
->target().get_size() == 32)
1511 os
->set_entsize(elfcpp::Elf_sizes
<32>::dyn_size
);
1512 else if (parameters
->target().get_size() == 64)
1513 os
->set_entsize(elfcpp::Elf_sizes
<64>::dyn_size
);
1518 // Set the final data size.
1521 Output_data_dynamic::set_final_data_size()
1523 // Add the terminating entry if it hasn't been added.
1524 // Because of relaxation, we can run this multiple times.
1525 if (this->entries_
.empty()
1526 || this->entries_
.rbegin()->tag() != elfcpp::DT_NULL
)
1527 this->add_constant(elfcpp::DT_NULL
, 0);
1530 if (parameters
->target().get_size() == 32)
1531 dyn_size
= elfcpp::Elf_sizes
<32>::dyn_size
;
1532 else if (parameters
->target().get_size() == 64)
1533 dyn_size
= elfcpp::Elf_sizes
<64>::dyn_size
;
1536 this->set_data_size(this->entries_
.size() * dyn_size
);
1539 // Write out the dynamic entries.
1542 Output_data_dynamic::do_write(Output_file
* of
)
1544 switch (parameters
->size_and_endianness())
1546 #ifdef HAVE_TARGET_32_LITTLE
1547 case Parameters::TARGET_32_LITTLE
:
1548 this->sized_write
<32, false>(of
);
1551 #ifdef HAVE_TARGET_32_BIG
1552 case Parameters::TARGET_32_BIG
:
1553 this->sized_write
<32, true>(of
);
1556 #ifdef HAVE_TARGET_64_LITTLE
1557 case Parameters::TARGET_64_LITTLE
:
1558 this->sized_write
<64, false>(of
);
1561 #ifdef HAVE_TARGET_64_BIG
1562 case Parameters::TARGET_64_BIG
:
1563 this->sized_write
<64, true>(of
);
1571 template<int size
, bool big_endian
>
1573 Output_data_dynamic::sized_write(Output_file
* of
)
1575 const int dyn_size
= elfcpp::Elf_sizes
<size
>::dyn_size
;
1577 const off_t offset
= this->offset();
1578 const off_t oview_size
= this->data_size();
1579 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
1581 unsigned char* pov
= oview
;
1582 for (typename
Dynamic_entries::const_iterator p
= this->entries_
.begin();
1583 p
!= this->entries_
.end();
1586 p
->write
<size
, big_endian
>(pov
, this->pool_
);
1590 gold_assert(pov
- oview
== oview_size
);
1592 of
->write_output_view(offset
, oview_size
, oview
);
1594 // We no longer need the dynamic entries.
1595 this->entries_
.clear();
1598 // Class Output_symtab_xindex.
1601 Output_symtab_xindex::do_write(Output_file
* of
)
1603 const off_t offset
= this->offset();
1604 const off_t oview_size
= this->data_size();
1605 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
1607 memset(oview
, 0, oview_size
);
1609 if (parameters
->target().is_big_endian())
1610 this->endian_do_write
<true>(oview
);
1612 this->endian_do_write
<false>(oview
);
1614 of
->write_output_view(offset
, oview_size
, oview
);
1616 // We no longer need the data.
1617 this->entries_
.clear();
1620 template<bool big_endian
>
1622 Output_symtab_xindex::endian_do_write(unsigned char* const oview
)
1624 for (Xindex_entries::const_iterator p
= this->entries_
.begin();
1625 p
!= this->entries_
.end();
1628 unsigned int symndx
= p
->first
;
1629 gold_assert(symndx
* 4 < this->data_size());
1630 elfcpp::Swap
<32, big_endian
>::writeval(oview
+ symndx
* 4, p
->second
);
1634 // Output_section::Input_section methods.
1636 // Return the data size. For an input section we store the size here.
1637 // For an Output_section_data, we have to ask it for the size.
1640 Output_section::Input_section::data_size() const
1642 if (this->is_input_section())
1643 return this->u1_
.data_size
;
1645 return this->u2_
.posd
->data_size();
1648 // Set the address and file offset.
1651 Output_section::Input_section::set_address_and_file_offset(
1654 off_t section_file_offset
)
1656 if (this->is_input_section())
1657 this->u2_
.object
->set_section_offset(this->shndx_
,
1658 file_offset
- section_file_offset
);
1660 this->u2_
.posd
->set_address_and_file_offset(address
, file_offset
);
1663 // Reset the address and file offset.
1666 Output_section::Input_section::reset_address_and_file_offset()
1668 if (!this->is_input_section())
1669 this->u2_
.posd
->reset_address_and_file_offset();
1672 // Finalize the data size.
1675 Output_section::Input_section::finalize_data_size()
1677 if (!this->is_input_section())
1678 this->u2_
.posd
->finalize_data_size();
1681 // Try to turn an input offset into an output offset. We want to
1682 // return the output offset relative to the start of this
1683 // Input_section in the output section.
1686 Output_section::Input_section::output_offset(
1687 const Relobj
* object
,
1689 section_offset_type offset
,
1690 section_offset_type
*poutput
) const
1692 if (!this->is_input_section())
1693 return this->u2_
.posd
->output_offset(object
, shndx
, offset
, poutput
);
1696 if (this->shndx_
!= shndx
|| this->u2_
.object
!= object
)
1703 // Return whether this is the merge section for the input section
1707 Output_section::Input_section::is_merge_section_for(const Relobj
* object
,
1708 unsigned int shndx
) const
1710 if (this->is_input_section())
1712 return this->u2_
.posd
->is_merge_section_for(object
, shndx
);
1715 // Write out the data. We don't have to do anything for an input
1716 // section--they are handled via Object::relocate--but this is where
1717 // we write out the data for an Output_section_data.
1720 Output_section::Input_section::write(Output_file
* of
)
1722 if (!this->is_input_section())
1723 this->u2_
.posd
->write(of
);
1726 // Write the data to a buffer. As for write(), we don't have to do
1727 // anything for an input section.
1730 Output_section::Input_section::write_to_buffer(unsigned char* buffer
)
1732 if (!this->is_input_section())
1733 this->u2_
.posd
->write_to_buffer(buffer
);
1736 // Print to a map file.
1739 Output_section::Input_section::print_to_mapfile(Mapfile
* mapfile
) const
1741 switch (this->shndx_
)
1743 case OUTPUT_SECTION_CODE
:
1744 case MERGE_DATA_SECTION_CODE
:
1745 case MERGE_STRING_SECTION_CODE
:
1746 this->u2_
.posd
->print_to_mapfile(mapfile
);
1749 case RELAXED_INPUT_SECTION_CODE
:
1751 Output_relaxed_input_section
* relaxed_section
=
1752 this->relaxed_input_section();
1753 mapfile
->print_input_section(relaxed_section
->relobj(),
1754 relaxed_section
->shndx());
1758 mapfile
->print_input_section(this->u2_
.object
, this->shndx_
);
1763 // Output_section methods.
1765 // Construct an Output_section. NAME will point into a Stringpool.
1767 Output_section::Output_section(const char* name
, elfcpp::Elf_Word type
,
1768 elfcpp::Elf_Xword flags
)
1773 link_section_(NULL
),
1775 info_section_(NULL
),
1784 first_input_offset_(0),
1786 postprocessing_buffer_(NULL
),
1787 needs_symtab_index_(false),
1788 needs_dynsym_index_(false),
1789 should_link_to_symtab_(false),
1790 should_link_to_dynsym_(false),
1791 after_input_sections_(false),
1792 requires_postprocessing_(false),
1793 found_in_sections_clause_(false),
1794 has_load_address_(false),
1795 info_uses_section_index_(false),
1796 may_sort_attached_input_sections_(false),
1797 must_sort_attached_input_sections_(false),
1798 attached_input_sections_are_sorted_(false),
1800 is_relro_local_(false),
1801 is_small_section_(false),
1802 is_large_section_(false),
1805 merge_section_map_(),
1806 merge_section_by_properties_map_(),
1807 relaxed_input_section_map_(),
1808 is_relaxed_input_section_map_valid_(true),
1809 generate_code_fills_at_write_(false)
1811 // An unallocated section has no address. Forcing this means that
1812 // we don't need special treatment for symbols defined in debug
1814 if ((flags
& elfcpp::SHF_ALLOC
) == 0)
1815 this->set_address(0);
1818 Output_section::~Output_section()
1820 delete this->checkpoint_
;
1823 // Set the entry size.
1826 Output_section::set_entsize(uint64_t v
)
1828 if (this->entsize_
== 0)
1831 gold_assert(this->entsize_
== v
);
1834 // Add the input section SHNDX, with header SHDR, named SECNAME, in
1835 // OBJECT, to the Output_section. RELOC_SHNDX is the index of a
1836 // relocation section which applies to this section, or 0 if none, or
1837 // -1U if more than one. Return the offset of the input section
1838 // within the output section. Return -1 if the input section will
1839 // receive special handling. In the normal case we don't always keep
1840 // track of input sections for an Output_section. Instead, each
1841 // Object keeps track of the Output_section for each of its input
1842 // sections. However, if HAVE_SECTIONS_SCRIPT is true, we do keep
1843 // track of input sections here; this is used when SECTIONS appears in
1846 template<int size
, bool big_endian
>
1848 Output_section::add_input_section(Sized_relobj
<size
, big_endian
>* object
,
1850 const char* secname
,
1851 const elfcpp::Shdr
<size
, big_endian
>& shdr
,
1852 unsigned int reloc_shndx
,
1853 bool have_sections_script
)
1855 elfcpp::Elf_Xword addralign
= shdr
.get_sh_addralign();
1856 if ((addralign
& (addralign
- 1)) != 0)
1858 object
->error(_("invalid alignment %lu for section \"%s\""),
1859 static_cast<unsigned long>(addralign
), secname
);
1863 if (addralign
> this->addralign_
)
1864 this->addralign_
= addralign
;
1866 typename
elfcpp::Elf_types
<size
>::Elf_WXword sh_flags
= shdr
.get_sh_flags();
1867 this->update_flags_for_input_section(sh_flags
);
1869 uint64_t entsize
= shdr
.get_sh_entsize();
1871 // .debug_str is a mergeable string section, but is not always so
1872 // marked by compilers. Mark manually here so we can optimize.
1873 if (strcmp(secname
, ".debug_str") == 0)
1875 sh_flags
|= (elfcpp::SHF_MERGE
| elfcpp::SHF_STRINGS
);
1879 // If this is a SHF_MERGE section, we pass all the input sections to
1880 // a Output_data_merge. We don't try to handle relocations for such
1881 // a section. We don't try to handle empty merge sections--they
1882 // mess up the mappings, and are useless anyhow.
1883 if ((sh_flags
& elfcpp::SHF_MERGE
) != 0
1885 && shdr
.get_sh_size() > 0)
1887 if (this->add_merge_input_section(object
, shndx
, sh_flags
,
1888 entsize
, addralign
))
1890 // Tell the relocation routines that they need to call the
1891 // output_offset method to determine the final address.
1896 off_t offset_in_section
= this->current_data_size_for_child();
1897 off_t aligned_offset_in_section
= align_address(offset_in_section
,
1900 // Determine if we want to delay code-fill generation until the output
1901 // section is written. When the target is relaxing, we want to delay fill
1902 // generating to avoid adjusting them during relaxation.
1903 if (!this->generate_code_fills_at_write_
1904 && !have_sections_script
1905 && (sh_flags
& elfcpp::SHF_EXECINSTR
) != 0
1906 && parameters
->target().has_code_fill()
1907 && parameters
->target().may_relax())
1909 gold_assert(this->fills_
.empty());
1910 this->generate_code_fills_at_write_
= true;
1913 if (aligned_offset_in_section
> offset_in_section
1914 && !this->generate_code_fills_at_write_
1915 && !have_sections_script
1916 && (sh_flags
& elfcpp::SHF_EXECINSTR
) != 0
1917 && parameters
->target().has_code_fill())
1919 // We need to add some fill data. Using fill_list_ when
1920 // possible is an optimization, since we will often have fill
1921 // sections without input sections.
1922 off_t fill_len
= aligned_offset_in_section
- offset_in_section
;
1923 if (this->input_sections_
.empty())
1924 this->fills_
.push_back(Fill(offset_in_section
, fill_len
));
1927 std::string
fill_data(parameters
->target().code_fill(fill_len
));
1928 Output_data_const
* odc
= new Output_data_const(fill_data
, 1);
1929 this->input_sections_
.push_back(Input_section(odc
));
1933 this->set_current_data_size_for_child(aligned_offset_in_section
1934 + shdr
.get_sh_size());
1936 // We need to keep track of this section if we are already keeping
1937 // track of sections, or if we are relaxing. Also, if this is a
1938 // section which requires sorting, or which may require sorting in
1939 // the future, we keep track of the sections.
1940 if (have_sections_script
1941 || !this->input_sections_
.empty()
1942 || this->may_sort_attached_input_sections()
1943 || this->must_sort_attached_input_sections()
1944 || parameters
->options().user_set_Map()
1945 || parameters
->target().may_relax())
1946 this->input_sections_
.push_back(Input_section(object
, shndx
,
1950 return aligned_offset_in_section
;
1953 // Add arbitrary data to an output section.
1956 Output_section::add_output_section_data(Output_section_data
* posd
)
1958 Input_section
inp(posd
);
1959 this->add_output_section_data(&inp
);
1961 if (posd
->is_data_size_valid())
1963 off_t offset_in_section
= this->current_data_size_for_child();
1964 off_t aligned_offset_in_section
= align_address(offset_in_section
,
1966 this->set_current_data_size_for_child(aligned_offset_in_section
1967 + posd
->data_size());
1971 // Add a relaxed input section.
1974 Output_section::add_relaxed_input_section(Output_relaxed_input_section
* poris
)
1976 Input_section
inp(poris
);
1977 this->add_output_section_data(&inp
);
1978 if (this->is_relaxed_input_section_map_valid_
)
1980 Input_section_specifier
iss(poris
->relobj(), poris
->shndx());
1981 this->relaxed_input_section_map_
[iss
] = poris
;
1984 // For a relaxed section, we use the current data size. Linker scripts
1985 // get all the input sections, including relaxed one from an output
1986 // section and add them back to them same output section to compute the
1987 // output section size. If we do not account for sizes of relaxed input
1988 // sections, an output section would be incorrectly sized.
1989 off_t offset_in_section
= this->current_data_size_for_child();
1990 off_t aligned_offset_in_section
= align_address(offset_in_section
,
1991 poris
->addralign());
1992 this->set_current_data_size_for_child(aligned_offset_in_section
1993 + poris
->current_data_size());
1996 // Add arbitrary data to an output section by Input_section.
1999 Output_section::add_output_section_data(Input_section
* inp
)
2001 if (this->input_sections_
.empty())
2002 this->first_input_offset_
= this->current_data_size_for_child();
2004 this->input_sections_
.push_back(*inp
);
2006 uint64_t addralign
= inp
->addralign();
2007 if (addralign
> this->addralign_
)
2008 this->addralign_
= addralign
;
2010 inp
->set_output_section(this);
2013 // Add a merge section to an output section.
2016 Output_section::add_output_merge_section(Output_section_data
* posd
,
2017 bool is_string
, uint64_t entsize
)
2019 Input_section
inp(posd
, is_string
, entsize
);
2020 this->add_output_section_data(&inp
);
2023 // Add an input section to a SHF_MERGE section.
2026 Output_section::add_merge_input_section(Relobj
* object
, unsigned int shndx
,
2027 uint64_t flags
, uint64_t entsize
,
2030 bool is_string
= (flags
& elfcpp::SHF_STRINGS
) != 0;
2032 // We only merge strings if the alignment is not more than the
2033 // character size. This could be handled, but it's unusual.
2034 if (is_string
&& addralign
> entsize
)
2037 // We cannot restore merged input section states.
2038 gold_assert(this->checkpoint_
== NULL
);
2040 // Look up merge sections by required properties.
2041 Merge_section_properties
msp(is_string
, entsize
, addralign
);
2042 Merge_section_by_properties_map::const_iterator p
=
2043 this->merge_section_by_properties_map_
.find(msp
);
2044 if (p
!= this->merge_section_by_properties_map_
.end())
2046 Output_merge_base
* merge_section
= p
->second
;
2047 merge_section
->add_input_section(object
, shndx
);
2048 gold_assert(merge_section
->is_string() == is_string
2049 && merge_section
->entsize() == entsize
2050 && merge_section
->addralign() == addralign
);
2052 // Link input section to found merge section.
2053 Input_section_specifier
iss(object
, shndx
);
2054 this->merge_section_map_
[iss
] = merge_section
;
2058 // We handle the actual constant merging in Output_merge_data or
2059 // Output_merge_string_data.
2060 Output_merge_base
* pomb
;
2062 pomb
= new Output_merge_data(entsize
, addralign
);
2068 pomb
= new Output_merge_string
<char>(addralign
);
2071 pomb
= new Output_merge_string
<uint16_t>(addralign
);
2074 pomb
= new Output_merge_string
<uint32_t>(addralign
);
2081 // Add new merge section to this output section and link merge section
2082 // properties to new merge section in map.
2083 this->add_output_merge_section(pomb
, is_string
, entsize
);
2084 this->merge_section_by_properties_map_
[msp
] = pomb
;
2086 // Add input section to new merge section and link input section to new
2087 // merge section in map.
2088 pomb
->add_input_section(object
, shndx
);
2089 Input_section_specifier
iss(object
, shndx
);
2090 this->merge_section_map_
[iss
] = pomb
;
2095 // Build a relaxation map to speed up relaxation of existing input sections.
2096 // Look up to the first LIMIT elements in INPUT_SECTIONS.
2099 Output_section::build_relaxation_map(
2100 const Input_section_list
& input_sections
,
2102 Relaxation_map
* relaxation_map
) const
2104 for (size_t i
= 0; i
< limit
; ++i
)
2106 const Input_section
& is(input_sections
[i
]);
2107 if (is
.is_input_section() || is
.is_relaxed_input_section())
2109 Input_section_specifier
iss(is
.relobj(), is
.shndx());
2110 (*relaxation_map
)[iss
] = i
;
2115 // Convert regular input sections in INPUT_SECTIONS into relaxed input
2116 // sections in RELAXED_SECTIONS. MAP is a prebuilt map from input section
2117 // specifier to indices of INPUT_SECTIONS.
2120 Output_section::convert_input_sections_in_list_to_relaxed_sections(
2121 const std::vector
<Output_relaxed_input_section
*>& relaxed_sections
,
2122 const Relaxation_map
& map
,
2123 Input_section_list
* input_sections
)
2125 for (size_t i
= 0; i
< relaxed_sections
.size(); ++i
)
2127 Output_relaxed_input_section
* poris
= relaxed_sections
[i
];
2128 Input_section_specifier
iss(poris
->relobj(), poris
->shndx());
2129 Relaxation_map::const_iterator p
= map
.find(iss
);
2130 gold_assert(p
!= map
.end());
2131 gold_assert((*input_sections
)[p
->second
].is_input_section());
2132 (*input_sections
)[p
->second
] = Input_section(poris
);
2136 // Convert regular input sections into relaxed input sections. RELAXED_SECTIONS
2137 // is a vector of pointers to Output_relaxed_input_section or its derived
2138 // classes. The relaxed sections must correspond to existing input sections.
2141 Output_section::convert_input_sections_to_relaxed_sections(
2142 const std::vector
<Output_relaxed_input_section
*>& relaxed_sections
)
2144 gold_assert(parameters
->target().may_relax());
2146 // We want to make sure that restore_states does not undo the effect of
2147 // this. If there is no checkpoint active, just search the current
2148 // input section list and replace the sections there. If there is
2149 // a checkpoint, also replace the sections there.
2151 // By default, we look at the whole list.
2152 size_t limit
= this->input_sections_
.size();
2154 if (this->checkpoint_
!= NULL
)
2156 // Replace input sections with relaxed input section in the saved
2157 // copy of the input section list.
2158 if (this->checkpoint_
->input_sections_saved())
2161 this->build_relaxation_map(
2162 *(this->checkpoint_
->input_sections()),
2163 this->checkpoint_
->input_sections()->size(),
2165 this->convert_input_sections_in_list_to_relaxed_sections(
2168 this->checkpoint_
->input_sections());
2172 // We have not copied the input section list yet. Instead, just
2173 // look at the portion that would be saved.
2174 limit
= this->checkpoint_
->input_sections_size();
2178 // Convert input sections in input_section_list.
2180 this->build_relaxation_map(this->input_sections_
, limit
, &map
);
2181 this->convert_input_sections_in_list_to_relaxed_sections(
2184 &this->input_sections_
);
2187 // Update the output section flags based on input section flags.
2190 Output_section::update_flags_for_input_section(elfcpp::Elf_Xword flags
)
2192 // If we created the section with SHF_ALLOC clear, we set the
2193 // address. If we are now setting the SHF_ALLOC flag, we need to
2195 if ((this->flags_
& elfcpp::SHF_ALLOC
) == 0
2196 && (flags
& elfcpp::SHF_ALLOC
) != 0)
2197 this->mark_address_invalid();
2199 this->flags_
|= (flags
2200 & (elfcpp::SHF_WRITE
2202 | elfcpp::SHF_EXECINSTR
));
2205 // Find the merge section into which an input section with index SHNDX in
2206 // OBJECT has been added. Return NULL if none found.
2208 Output_section_data
*
2209 Output_section::find_merge_section(const Relobj
* object
,
2210 unsigned int shndx
) const
2212 Input_section_specifier
iss(object
, shndx
);
2213 Output_section_data_by_input_section_map::const_iterator p
=
2214 this->merge_section_map_
.find(iss
);
2215 if (p
!= this->merge_section_map_
.end())
2217 Output_section_data
* posd
= p
->second
;
2218 gold_assert(posd
->is_merge_section_for(object
, shndx
));
2225 // Find an relaxed input section corresponding to an input section
2226 // in OBJECT with index SHNDX.
2228 const Output_section_data
*
2229 Output_section::find_relaxed_input_section(const Relobj
* object
,
2230 unsigned int shndx
) const
2232 // Be careful that the map may not be valid due to input section export
2233 // to scripts or a check-point restore.
2234 if (!this->is_relaxed_input_section_map_valid_
)
2236 // Rebuild the map as needed.
2237 this->relaxed_input_section_map_
.clear();
2238 for (Input_section_list::const_iterator p
= this->input_sections_
.begin();
2239 p
!= this->input_sections_
.end();
2241 if (p
->is_relaxed_input_section())
2243 Input_section_specifier
iss(p
->relobj(), p
->shndx());
2244 this->relaxed_input_section_map_
[iss
] =
2245 p
->relaxed_input_section();
2247 this->is_relaxed_input_section_map_valid_
= true;
2250 Input_section_specifier
iss(object
, shndx
);
2251 Output_section_data_by_input_section_map::const_iterator p
=
2252 this->relaxed_input_section_map_
.find(iss
);
2253 if (p
!= this->relaxed_input_section_map_
.end())
2259 // Given an address OFFSET relative to the start of input section
2260 // SHNDX in OBJECT, return whether this address is being included in
2261 // the final link. This should only be called if SHNDX in OBJECT has
2262 // a special mapping.
2265 Output_section::is_input_address_mapped(const Relobj
* object
,
2269 // Look at the Output_section_data_maps first.
2270 const Output_section_data
* posd
= this->find_merge_section(object
, shndx
);
2272 posd
= this->find_relaxed_input_section(object
, shndx
);
2276 section_offset_type output_offset
;
2277 bool found
= posd
->output_offset(object
, shndx
, offset
, &output_offset
);
2279 return output_offset
!= -1;
2282 // Fall back to the slow look-up.
2283 for (Input_section_list::const_iterator p
= this->input_sections_
.begin();
2284 p
!= this->input_sections_
.end();
2287 section_offset_type output_offset
;
2288 if (p
->output_offset(object
, shndx
, offset
, &output_offset
))
2289 return output_offset
!= -1;
2292 // By default we assume that the address is mapped. This should
2293 // only be called after we have passed all sections to Layout. At
2294 // that point we should know what we are discarding.
2298 // Given an address OFFSET relative to the start of input section
2299 // SHNDX in object OBJECT, return the output offset relative to the
2300 // start of the input section in the output section. This should only
2301 // be called if SHNDX in OBJECT has a special mapping.
2304 Output_section::output_offset(const Relobj
* object
, unsigned int shndx
,
2305 section_offset_type offset
) const
2307 // This can only be called meaningfully when we know the data size
2309 gold_assert(this->is_data_size_valid());
2311 // Look at the Output_section_data_maps first.
2312 const Output_section_data
* posd
= this->find_merge_section(object
, shndx
);
2314 posd
= this->find_relaxed_input_section(object
, shndx
);
2317 section_offset_type output_offset
;
2318 bool found
= posd
->output_offset(object
, shndx
, offset
, &output_offset
);
2320 return output_offset
;
2323 // Fall back to the slow look-up.
2324 for (Input_section_list::const_iterator p
= this->input_sections_
.begin();
2325 p
!= this->input_sections_
.end();
2328 section_offset_type output_offset
;
2329 if (p
->output_offset(object
, shndx
, offset
, &output_offset
))
2330 return output_offset
;
2335 // Return the output virtual address of OFFSET relative to the start
2336 // of input section SHNDX in object OBJECT.
2339 Output_section::output_address(const Relobj
* object
, unsigned int shndx
,
2342 uint64_t addr
= this->address() + this->first_input_offset_
;
2344 // Look at the Output_section_data_maps first.
2345 const Output_section_data
* posd
= this->find_merge_section(object
, shndx
);
2347 posd
= this->find_relaxed_input_section(object
, shndx
);
2348 if (posd
!= NULL
&& posd
->is_address_valid())
2350 section_offset_type output_offset
;
2351 bool found
= posd
->output_offset(object
, shndx
, offset
, &output_offset
);
2353 return posd
->address() + output_offset
;
2356 // Fall back to the slow look-up.
2357 for (Input_section_list::const_iterator p
= this->input_sections_
.begin();
2358 p
!= this->input_sections_
.end();
2361 addr
= align_address(addr
, p
->addralign());
2362 section_offset_type output_offset
;
2363 if (p
->output_offset(object
, shndx
, offset
, &output_offset
))
2365 if (output_offset
== -1)
2367 return addr
+ output_offset
;
2369 addr
+= p
->data_size();
2372 // If we get here, it means that we don't know the mapping for this
2373 // input section. This might happen in principle if
2374 // add_input_section were called before add_output_section_data.
2375 // But it should never actually happen.
2380 // Find the output address of the start of the merged section for
2381 // input section SHNDX in object OBJECT.
2384 Output_section::find_starting_output_address(const Relobj
* object
,
2386 uint64_t* paddr
) const
2388 // FIXME: This becomes a bottle-neck if we have many relaxed sections.
2389 // Looking up the merge section map does not always work as we sometimes
2390 // find a merge section without its address set.
2391 uint64_t addr
= this->address() + this->first_input_offset_
;
2392 for (Input_section_list::const_iterator p
= this->input_sections_
.begin();
2393 p
!= this->input_sections_
.end();
2396 addr
= align_address(addr
, p
->addralign());
2398 // It would be nice if we could use the existing output_offset
2399 // method to get the output offset of input offset 0.
2400 // Unfortunately we don't know for sure that input offset 0 is
2402 if (p
->is_merge_section_for(object
, shndx
))
2408 addr
+= p
->data_size();
2411 // We couldn't find a merge output section for this input section.
2415 // Set the data size of an Output_section. This is where we handle
2416 // setting the addresses of any Output_section_data objects.
2419 Output_section::set_final_data_size()
2421 if (this->input_sections_
.empty())
2423 this->set_data_size(this->current_data_size_for_child());
2427 if (this->must_sort_attached_input_sections())
2428 this->sort_attached_input_sections();
2430 uint64_t address
= this->address();
2431 off_t startoff
= this->offset();
2432 off_t off
= startoff
+ this->first_input_offset_
;
2433 for (Input_section_list::iterator p
= this->input_sections_
.begin();
2434 p
!= this->input_sections_
.end();
2437 off
= align_address(off
, p
->addralign());
2438 p
->set_address_and_file_offset(address
+ (off
- startoff
), off
,
2440 off
+= p
->data_size();
2443 this->set_data_size(off
- startoff
);
2446 // Reset the address and file offset.
2449 Output_section::do_reset_address_and_file_offset()
2451 // An unallocated section has no address. Forcing this means that
2452 // we don't need special treatment for symbols defined in debug
2453 // sections. We do the same in the constructor.
2454 if ((this->flags_
& elfcpp::SHF_ALLOC
) == 0)
2455 this->set_address(0);
2457 for (Input_section_list::iterator p
= this->input_sections_
.begin();
2458 p
!= this->input_sections_
.end();
2460 p
->reset_address_and_file_offset();
2463 // Return true if address and file offset have the values after reset.
2466 Output_section::do_address_and_file_offset_have_reset_values() const
2468 if (this->is_offset_valid())
2471 // An unallocated section has address 0 after its construction or a reset.
2472 if ((this->flags_
& elfcpp::SHF_ALLOC
) == 0)
2473 return this->is_address_valid() && this->address() == 0;
2475 return !this->is_address_valid();
2478 // Set the TLS offset. Called only for SHT_TLS sections.
2481 Output_section::do_set_tls_offset(uint64_t tls_base
)
2483 this->tls_offset_
= this->address() - tls_base
;
2486 // In a few cases we need to sort the input sections attached to an
2487 // output section. This is used to implement the type of constructor
2488 // priority ordering implemented by the GNU linker, in which the
2489 // priority becomes part of the section name and the sections are
2490 // sorted by name. We only do this for an output section if we see an
2491 // attached input section matching ".ctor.*", ".dtor.*",
2492 // ".init_array.*" or ".fini_array.*".
2494 class Output_section::Input_section_sort_entry
2497 Input_section_sort_entry()
2498 : input_section_(), index_(-1U), section_has_name_(false),
2502 Input_section_sort_entry(const Input_section
& input_section
,
2504 : input_section_(input_section
), index_(index
),
2505 section_has_name_(input_section
.is_input_section()
2506 || input_section
.is_relaxed_input_section())
2508 if (this->section_has_name_
)
2510 // This is only called single-threaded from Layout::finalize,
2511 // so it is OK to lock. Unfortunately we have no way to pass
2513 const Task
* dummy_task
= reinterpret_cast<const Task
*>(-1);
2514 Object
* obj
= (input_section
.is_input_section()
2515 ? input_section
.relobj()
2516 : input_section
.relaxed_input_section()->relobj());
2517 Task_lock_obj
<Object
> tl(dummy_task
, obj
);
2519 // This is a slow operation, which should be cached in
2520 // Layout::layout if this becomes a speed problem.
2521 this->section_name_
= obj
->section_name(input_section
.shndx());
2525 // Return the Input_section.
2526 const Input_section
&
2527 input_section() const
2529 gold_assert(this->index_
!= -1U);
2530 return this->input_section_
;
2533 // The index of this entry in the original list. This is used to
2534 // make the sort stable.
2538 gold_assert(this->index_
!= -1U);
2539 return this->index_
;
2542 // Whether there is a section name.
2544 section_has_name() const
2545 { return this->section_has_name_
; }
2547 // The section name.
2549 section_name() const
2551 gold_assert(this->section_has_name_
);
2552 return this->section_name_
;
2555 // Return true if the section name has a priority. This is assumed
2556 // to be true if it has a dot after the initial dot.
2558 has_priority() const
2560 gold_assert(this->section_has_name_
);
2561 return this->section_name_
.find('.', 1);
2564 // Return true if this an input file whose base name matches
2565 // FILE_NAME. The base name must have an extension of ".o", and
2566 // must be exactly FILE_NAME.o or FILE_NAME, one character, ".o".
2567 // This is to match crtbegin.o as well as crtbeginS.o without
2568 // getting confused by other possibilities. Overall matching the
2569 // file name this way is a dreadful hack, but the GNU linker does it
2570 // in order to better support gcc, and we need to be compatible.
2572 match_file_name(const char* match_file_name
) const
2574 const std::string
& file_name(this->input_section_
.relobj()->name());
2575 const char* base_name
= lbasename(file_name
.c_str());
2576 size_t match_len
= strlen(match_file_name
);
2577 if (strncmp(base_name
, match_file_name
, match_len
) != 0)
2579 size_t base_len
= strlen(base_name
);
2580 if (base_len
!= match_len
+ 2 && base_len
!= match_len
+ 3)
2582 return memcmp(base_name
+ base_len
- 2, ".o", 2) == 0;
2586 // The Input_section we are sorting.
2587 Input_section input_section_
;
2588 // The index of this Input_section in the original list.
2589 unsigned int index_
;
2590 // Whether this Input_section has a section name--it won't if this
2591 // is some random Output_section_data.
2592 bool section_has_name_
;
2593 // The section name if there is one.
2594 std::string section_name_
;
2597 // Return true if S1 should come before S2 in the output section.
2600 Output_section::Input_section_sort_compare::operator()(
2601 const Output_section::Input_section_sort_entry
& s1
,
2602 const Output_section::Input_section_sort_entry
& s2
) const
2604 // crtbegin.o must come first.
2605 bool s1_begin
= s1
.match_file_name("crtbegin");
2606 bool s2_begin
= s2
.match_file_name("crtbegin");
2607 if (s1_begin
|| s2_begin
)
2613 return s1
.index() < s2
.index();
2616 // crtend.o must come last.
2617 bool s1_end
= s1
.match_file_name("crtend");
2618 bool s2_end
= s2
.match_file_name("crtend");
2619 if (s1_end
|| s2_end
)
2625 return s1
.index() < s2
.index();
2628 // We sort all the sections with no names to the end.
2629 if (!s1
.section_has_name() || !s2
.section_has_name())
2631 if (s1
.section_has_name())
2633 if (s2
.section_has_name())
2635 return s1
.index() < s2
.index();
2638 // A section with a priority follows a section without a priority.
2639 // The GNU linker does this for all but .init_array sections; until
2640 // further notice we'll assume that that is an mistake.
2641 bool s1_has_priority
= s1
.has_priority();
2642 bool s2_has_priority
= s2
.has_priority();
2643 if (s1_has_priority
&& !s2_has_priority
)
2645 if (!s1_has_priority
&& s2_has_priority
)
2648 // Otherwise we sort by name.
2649 int compare
= s1
.section_name().compare(s2
.section_name());
2653 // Otherwise we keep the input order.
2654 return s1
.index() < s2
.index();
2657 // Sort the input sections attached to an output section.
2660 Output_section::sort_attached_input_sections()
2662 if (this->attached_input_sections_are_sorted_
)
2665 if (this->checkpoint_
!= NULL
2666 && !this->checkpoint_
->input_sections_saved())
2667 this->checkpoint_
->save_input_sections();
2669 // The only thing we know about an input section is the object and
2670 // the section index. We need the section name. Recomputing this
2671 // is slow but this is an unusual case. If this becomes a speed
2672 // problem we can cache the names as required in Layout::layout.
2674 // We start by building a larger vector holding a copy of each
2675 // Input_section, plus its current index in the list and its name.
2676 std::vector
<Input_section_sort_entry
> sort_list
;
2679 for (Input_section_list::iterator p
= this->input_sections_
.begin();
2680 p
!= this->input_sections_
.end();
2682 sort_list
.push_back(Input_section_sort_entry(*p
, i
));
2684 // Sort the input sections.
2685 std::sort(sort_list
.begin(), sort_list
.end(), Input_section_sort_compare());
2687 // Copy the sorted input sections back to our list.
2688 this->input_sections_
.clear();
2689 for (std::vector
<Input_section_sort_entry
>::iterator p
= sort_list
.begin();
2690 p
!= sort_list
.end();
2692 this->input_sections_
.push_back(p
->input_section());
2694 // Remember that we sorted the input sections, since we might get
2696 this->attached_input_sections_are_sorted_
= true;
2699 // Write the section header to *OSHDR.
2701 template<int size
, bool big_endian
>
2703 Output_section::write_header(const Layout
* layout
,
2704 const Stringpool
* secnamepool
,
2705 elfcpp::Shdr_write
<size
, big_endian
>* oshdr
) const
2707 oshdr
->put_sh_name(secnamepool
->get_offset(this->name_
));
2708 oshdr
->put_sh_type(this->type_
);
2710 elfcpp::Elf_Xword flags
= this->flags_
;
2711 if (this->info_section_
!= NULL
&& this->info_uses_section_index_
)
2712 flags
|= elfcpp::SHF_INFO_LINK
;
2713 oshdr
->put_sh_flags(flags
);
2715 oshdr
->put_sh_addr(this->address());
2716 oshdr
->put_sh_offset(this->offset());
2717 oshdr
->put_sh_size(this->data_size());
2718 if (this->link_section_
!= NULL
)
2719 oshdr
->put_sh_link(this->link_section_
->out_shndx());
2720 else if (this->should_link_to_symtab_
)
2721 oshdr
->put_sh_link(layout
->symtab_section()->out_shndx());
2722 else if (this->should_link_to_dynsym_
)
2723 oshdr
->put_sh_link(layout
->dynsym_section()->out_shndx());
2725 oshdr
->put_sh_link(this->link_
);
2727 elfcpp::Elf_Word info
;
2728 if (this->info_section_
!= NULL
)
2730 if (this->info_uses_section_index_
)
2731 info
= this->info_section_
->out_shndx();
2733 info
= this->info_section_
->symtab_index();
2735 else if (this->info_symndx_
!= NULL
)
2736 info
= this->info_symndx_
->symtab_index();
2739 oshdr
->put_sh_info(info
);
2741 oshdr
->put_sh_addralign(this->addralign_
);
2742 oshdr
->put_sh_entsize(this->entsize_
);
2745 // Write out the data. For input sections the data is written out by
2746 // Object::relocate, but we have to handle Output_section_data objects
2750 Output_section::do_write(Output_file
* of
)
2752 gold_assert(!this->requires_postprocessing());
2754 // If the target performs relaxation, we delay filler generation until now.
2755 gold_assert(!this->generate_code_fills_at_write_
|| this->fills_
.empty());
2757 off_t output_section_file_offset
= this->offset();
2758 for (Fill_list::iterator p
= this->fills_
.begin();
2759 p
!= this->fills_
.end();
2762 std::string
fill_data(parameters
->target().code_fill(p
->length()));
2763 of
->write(output_section_file_offset
+ p
->section_offset(),
2764 fill_data
.data(), fill_data
.size());
2767 off_t off
= this->offset() + this->first_input_offset_
;
2768 for (Input_section_list::iterator p
= this->input_sections_
.begin();
2769 p
!= this->input_sections_
.end();
2772 off_t aligned_off
= align_address(off
, p
->addralign());
2773 if (this->generate_code_fills_at_write_
&& (off
!= aligned_off
))
2775 size_t fill_len
= aligned_off
- off
;
2776 std::string
fill_data(parameters
->target().code_fill(fill_len
));
2777 of
->write(off
, fill_data
.data(), fill_data
.size());
2781 off
= aligned_off
+ p
->data_size();
2785 // If a section requires postprocessing, create the buffer to use.
2788 Output_section::create_postprocessing_buffer()
2790 gold_assert(this->requires_postprocessing());
2792 if (this->postprocessing_buffer_
!= NULL
)
2795 if (!this->input_sections_
.empty())
2797 off_t off
= this->first_input_offset_
;
2798 for (Input_section_list::iterator p
= this->input_sections_
.begin();
2799 p
!= this->input_sections_
.end();
2802 off
= align_address(off
, p
->addralign());
2803 p
->finalize_data_size();
2804 off
+= p
->data_size();
2806 this->set_current_data_size_for_child(off
);
2809 off_t buffer_size
= this->current_data_size_for_child();
2810 this->postprocessing_buffer_
= new unsigned char[buffer_size
];
2813 // Write all the data of an Output_section into the postprocessing
2814 // buffer. This is used for sections which require postprocessing,
2815 // such as compression. Input sections are handled by
2816 // Object::Relocate.
2819 Output_section::write_to_postprocessing_buffer()
2821 gold_assert(this->requires_postprocessing());
2823 // If the target performs relaxation, we delay filler generation until now.
2824 gold_assert(!this->generate_code_fills_at_write_
|| this->fills_
.empty());
2826 unsigned char* buffer
= this->postprocessing_buffer();
2827 for (Fill_list::iterator p
= this->fills_
.begin();
2828 p
!= this->fills_
.end();
2831 std::string
fill_data(parameters
->target().code_fill(p
->length()));
2832 memcpy(buffer
+ p
->section_offset(), fill_data
.data(),
2836 off_t off
= this->first_input_offset_
;
2837 for (Input_section_list::iterator p
= this->input_sections_
.begin();
2838 p
!= this->input_sections_
.end();
2841 off_t aligned_off
= align_address(off
, p
->addralign());
2842 if (this->generate_code_fills_at_write_
&& (off
!= aligned_off
))
2844 size_t fill_len
= aligned_off
- off
;
2845 std::string
fill_data(parameters
->target().code_fill(fill_len
));
2846 memcpy(buffer
+ off
, fill_data
.data(), fill_data
.size());
2849 p
->write_to_buffer(buffer
+ aligned_off
);
2850 off
= aligned_off
+ p
->data_size();
2854 // Get the input sections for linker script processing. We leave
2855 // behind the Output_section_data entries. Note that this may be
2856 // slightly incorrect for merge sections. We will leave them behind,
2857 // but it is possible that the script says that they should follow
2858 // some other input sections, as in:
2859 // .rodata { *(.rodata) *(.rodata.cst*) }
2860 // For that matter, we don't handle this correctly:
2861 // .rodata { foo.o(.rodata.cst*) *(.rodata.cst*) }
2862 // With luck this will never matter.
2865 Output_section::get_input_sections(
2867 const std::string
& fill
,
2868 std::list
<Simple_input_section
>* input_sections
)
2870 if (this->checkpoint_
!= NULL
2871 && !this->checkpoint_
->input_sections_saved())
2872 this->checkpoint_
->save_input_sections();
2874 // Invalidate the relaxed input section map.
2875 this->is_relaxed_input_section_map_valid_
= false;
2877 uint64_t orig_address
= address
;
2879 address
= align_address(address
, this->addralign());
2881 Input_section_list remaining
;
2882 for (Input_section_list::iterator p
= this->input_sections_
.begin();
2883 p
!= this->input_sections_
.end();
2886 if (p
->is_input_section())
2887 input_sections
->push_back(Simple_input_section(p
->relobj(),
2889 else if (p
->is_relaxed_input_section())
2890 input_sections
->push_back(
2891 Simple_input_section(p
->relaxed_input_section()));
2894 uint64_t aligned_address
= align_address(address
, p
->addralign());
2895 if (aligned_address
!= address
&& !fill
.empty())
2897 section_size_type length
=
2898 convert_to_section_size_type(aligned_address
- address
);
2899 std::string this_fill
;
2900 this_fill
.reserve(length
);
2901 while (this_fill
.length() + fill
.length() <= length
)
2903 if (this_fill
.length() < length
)
2904 this_fill
.append(fill
, 0, length
- this_fill
.length());
2906 Output_section_data
* posd
= new Output_data_const(this_fill
, 0);
2907 remaining
.push_back(Input_section(posd
));
2909 address
= aligned_address
;
2911 remaining
.push_back(*p
);
2913 p
->finalize_data_size();
2914 address
+= p
->data_size();
2918 this->input_sections_
.swap(remaining
);
2919 this->first_input_offset_
= 0;
2921 uint64_t data_size
= address
- orig_address
;
2922 this->set_current_data_size_for_child(data_size
);
2926 // Add an input section from a script.
2929 Output_section::add_input_section_for_script(const Simple_input_section
& sis
,
2933 if (addralign
> this->addralign_
)
2934 this->addralign_
= addralign
;
2936 off_t offset_in_section
= this->current_data_size_for_child();
2937 off_t aligned_offset_in_section
= align_address(offset_in_section
,
2940 this->set_current_data_size_for_child(aligned_offset_in_section
2944 (sis
.is_relaxed_input_section()
2945 ? Input_section(sis
.relaxed_input_section())
2946 : Input_section(sis
.relobj(), sis
.shndx(), data_size
, addralign
));
2947 this->input_sections_
.push_back(is
);
2953 Output_section::save_states()
2955 gold_assert(this->checkpoint_
== NULL
);
2956 Checkpoint_output_section
* checkpoint
=
2957 new Checkpoint_output_section(this->addralign_
, this->flags_
,
2958 this->input_sections_
,
2959 this->first_input_offset_
,
2960 this->attached_input_sections_are_sorted_
);
2961 this->checkpoint_
= checkpoint
;
2962 gold_assert(this->fills_
.empty());
2966 Output_section::restore_states()
2968 gold_assert(this->checkpoint_
!= NULL
);
2969 Checkpoint_output_section
* checkpoint
= this->checkpoint_
;
2971 this->addralign_
= checkpoint
->addralign();
2972 this->flags_
= checkpoint
->flags();
2973 this->first_input_offset_
= checkpoint
->first_input_offset();
2975 if (!checkpoint
->input_sections_saved())
2977 // If we have not copied the input sections, just resize it.
2978 size_t old_size
= checkpoint
->input_sections_size();
2979 gold_assert(this->input_sections_
.size() >= old_size
);
2980 this->input_sections_
.resize(old_size
);
2984 // We need to copy the whole list. This is not efficient for
2985 // extremely large output with hundreads of thousands of input
2986 // objects. We may need to re-think how we should pass sections
2988 this->input_sections_
= *checkpoint
->input_sections();
2991 this->attached_input_sections_are_sorted_
=
2992 checkpoint
->attached_input_sections_are_sorted();
2994 // Simply invalidate the relaxed input section map since we do not keep
2996 this->is_relaxed_input_section_map_valid_
= false;
2999 // Print to the map file.
3002 Output_section::do_print_to_mapfile(Mapfile
* mapfile
) const
3004 mapfile
->print_output_section(this);
3006 for (Input_section_list::const_iterator p
= this->input_sections_
.begin();
3007 p
!= this->input_sections_
.end();
3009 p
->print_to_mapfile(mapfile
);
3012 // Print stats for merge sections to stderr.
3015 Output_section::print_merge_stats()
3017 Input_section_list::iterator p
;
3018 for (p
= this->input_sections_
.begin();
3019 p
!= this->input_sections_
.end();
3021 p
->print_merge_stats(this->name_
);
3024 // Output segment methods.
3026 Output_segment::Output_segment(elfcpp::Elf_Word type
, elfcpp::Elf_Word flags
)
3038 is_max_align_known_(false),
3039 are_addresses_set_(false),
3040 is_large_data_segment_(false)
3044 // Add an Output_section to an Output_segment.
3047 Output_segment::add_output_section(Output_section
* os
,
3048 elfcpp::Elf_Word seg_flags
)
3050 gold_assert((os
->flags() & elfcpp::SHF_ALLOC
) != 0);
3051 gold_assert(!this->is_max_align_known_
);
3052 gold_assert(os
->is_large_data_section() == this->is_large_data_segment());
3054 // Update the segment flags.
3055 this->flags_
|= seg_flags
;
3057 Output_segment::Output_data_list
* pdl
;
3058 if (os
->type() == elfcpp::SHT_NOBITS
)
3059 pdl
= &this->output_bss_
;
3061 pdl
= &this->output_data_
;
3063 // So that PT_NOTE segments will work correctly, we need to ensure
3064 // that all SHT_NOTE sections are adjacent. This will normally
3065 // happen automatically, because all the SHT_NOTE input sections
3066 // will wind up in the same output section. However, it is possible
3067 // for multiple SHT_NOTE input sections to have different section
3068 // flags, and thus be in different output sections, but for the
3069 // different section flags to map into the same segment flags and
3070 // thus the same output segment.
3072 // Note that while there may be many input sections in an output
3073 // section, there are normally only a few output sections in an
3074 // output segment. This loop is expected to be fast.
3076 if (os
->type() == elfcpp::SHT_NOTE
&& !pdl
->empty())
3078 Output_segment::Output_data_list::iterator p
= pdl
->end();
3082 if ((*p
)->is_section_type(elfcpp::SHT_NOTE
))
3089 while (p
!= pdl
->begin());
3092 // Similarly, so that PT_TLS segments will work, we need to group
3093 // SHF_TLS sections. An SHF_TLS/SHT_NOBITS section is a special
3094 // case: we group the SHF_TLS/SHT_NOBITS sections right after the
3095 // SHF_TLS/SHT_PROGBITS sections. This lets us set up PT_TLS
3096 // correctly. SHF_TLS sections get added to both a PT_LOAD segment
3097 // and the PT_TLS segment -- we do this grouping only for the
3099 if (this->type_
!= elfcpp::PT_TLS
3100 && (os
->flags() & elfcpp::SHF_TLS
) != 0)
3102 pdl
= &this->output_data_
;
3105 bool nobits
= os
->type() == elfcpp::SHT_NOBITS
;
3106 bool sawtls
= false;
3107 Output_segment::Output_data_list::iterator p
= pdl
->end();
3108 gold_assert(p
!= pdl
->begin());
3113 if ((*p
)->is_section_flag_set(elfcpp::SHF_TLS
))
3116 // Put a NOBITS section after the first TLS section.
3117 // Put a PROGBITS section after the first
3118 // TLS/PROGBITS section.
3119 insert
= nobits
|| !(*p
)->is_section_type(elfcpp::SHT_NOBITS
);
3123 // If we've gone past the TLS sections, but we've
3124 // seen a TLS section, then we need to insert this
3136 while (p
!= pdl
->begin());
3139 // There are no TLS sections yet; put this one at the requested
3140 // location in the section list.
3143 // For the PT_GNU_RELRO segment, we need to group relro sections,
3144 // and we need to put them before any non-relro sections. Also,
3145 // relro local sections go before relro non-local sections.
3146 if (parameters
->options().relro() && os
->is_relro())
3148 gold_assert(pdl
== &this->output_data_
);
3149 Output_segment::Output_data_list::iterator p
;
3150 for (p
= pdl
->begin(); p
!= pdl
->end(); ++p
)
3152 if (!(*p
)->is_section())
3155 Output_section
* pos
= (*p
)->output_section();
3156 if (!pos
->is_relro()
3157 || (os
->is_relro_local() && !pos
->is_relro_local()))
3165 // Small data sections go at the end of the list of data sections.
3166 // If OS is not small, and there are small sections, we have to
3167 // insert it before the first small section.
3168 if (os
->type() != elfcpp::SHT_NOBITS
3169 && !os
->is_small_section()
3171 && pdl
->back()->is_section()
3172 && pdl
->back()->output_section()->is_small_section())
3174 for (Output_segment::Output_data_list::iterator p
= pdl
->begin();
3178 if ((*p
)->is_section()
3179 && (*p
)->output_section()->is_small_section())
3188 // A small BSS section goes at the start of the BSS sections, after
3189 // other small BSS sections.
3190 if (os
->type() == elfcpp::SHT_NOBITS
&& os
->is_small_section())
3192 for (Output_segment::Output_data_list::iterator p
= pdl
->begin();
3196 if (!(*p
)->is_section()
3197 || !(*p
)->output_section()->is_small_section())
3205 // A large BSS section goes at the end of the BSS sections, which
3206 // means that one that is not large must come before the first large
3208 if (os
->type() == elfcpp::SHT_NOBITS
3209 && !os
->is_large_section()
3211 && pdl
->back()->is_section()
3212 && pdl
->back()->output_section()->is_large_section())
3214 for (Output_segment::Output_data_list::iterator p
= pdl
->begin();
3218 if ((*p
)->is_section()
3219 && (*p
)->output_section()->is_large_section())
3231 // Remove an Output_section from this segment. It is an error if it
3235 Output_segment::remove_output_section(Output_section
* os
)
3237 // We only need this for SHT_PROGBITS.
3238 gold_assert(os
->type() == elfcpp::SHT_PROGBITS
);
3239 for (Output_data_list::iterator p
= this->output_data_
.begin();
3240 p
!= this->output_data_
.end();
3245 this->output_data_
.erase(p
);
3252 // Add an Output_data (which is not an Output_section) to the start of
3256 Output_segment::add_initial_output_data(Output_data
* od
)
3258 gold_assert(!this->is_max_align_known_
);
3259 this->output_data_
.push_front(od
);
3262 // Return whether the first data section is a relro section.
3265 Output_segment::is_first_section_relro() const
3267 return (!this->output_data_
.empty()
3268 && this->output_data_
.front()->is_section()
3269 && this->output_data_
.front()->output_section()->is_relro());
3272 // Return the maximum alignment of the Output_data in Output_segment.
3275 Output_segment::maximum_alignment()
3277 if (!this->is_max_align_known_
)
3281 addralign
= Output_segment::maximum_alignment_list(&this->output_data_
);
3282 if (addralign
> this->max_align_
)
3283 this->max_align_
= addralign
;
3285 addralign
= Output_segment::maximum_alignment_list(&this->output_bss_
);
3286 if (addralign
> this->max_align_
)
3287 this->max_align_
= addralign
;
3289 // If -z relro is in effect, and the first section in this
3290 // segment is a relro section, then the segment must be aligned
3291 // to at least the common page size. This ensures that the
3292 // PT_GNU_RELRO segment will start at a page boundary.
3293 if (this->type_
== elfcpp::PT_LOAD
3294 && parameters
->options().relro()
3295 && this->is_first_section_relro())
3297 addralign
= parameters
->target().common_pagesize();
3298 if (addralign
> this->max_align_
)
3299 this->max_align_
= addralign
;
3302 this->is_max_align_known_
= true;
3305 return this->max_align_
;
3308 // Return the maximum alignment of a list of Output_data.
3311 Output_segment::maximum_alignment_list(const Output_data_list
* pdl
)
3314 for (Output_data_list::const_iterator p
= pdl
->begin();
3318 uint64_t addralign
= (*p
)->addralign();
3319 if (addralign
> ret
)
3325 // Return the number of dynamic relocs applied to this segment.
3328 Output_segment::dynamic_reloc_count() const
3330 return (this->dynamic_reloc_count_list(&this->output_data_
)
3331 + this->dynamic_reloc_count_list(&this->output_bss_
));
3334 // Return the number of dynamic relocs applied to an Output_data_list.
3337 Output_segment::dynamic_reloc_count_list(const Output_data_list
* pdl
) const
3339 unsigned int count
= 0;
3340 for (Output_data_list::const_iterator p
= pdl
->begin();
3343 count
+= (*p
)->dynamic_reloc_count();
3347 // Set the section addresses for an Output_segment. If RESET is true,
3348 // reset the addresses first. ADDR is the address and *POFF is the
3349 // file offset. Set the section indexes starting with *PSHNDX.
3350 // Return the address of the immediately following segment. Update
3351 // *POFF and *PSHNDX.
3354 Output_segment::set_section_addresses(const Layout
* layout
, bool reset
,
3355 uint64_t addr
, off_t
* poff
,
3356 unsigned int* pshndx
)
3358 gold_assert(this->type_
== elfcpp::PT_LOAD
);
3360 if (!reset
&& this->are_addresses_set_
)
3362 gold_assert(this->paddr_
== addr
);
3363 addr
= this->vaddr_
;
3367 this->vaddr_
= addr
;
3368 this->paddr_
= addr
;
3369 this->are_addresses_set_
= true;
3372 bool in_tls
= false;
3374 bool in_relro
= (parameters
->options().relro()
3375 && this->is_first_section_relro());
3377 off_t orig_off
= *poff
;
3378 this->offset_
= orig_off
;
3380 addr
= this->set_section_list_addresses(layout
, reset
, &this->output_data_
,
3381 addr
, poff
, pshndx
, &in_tls
,
3383 this->filesz_
= *poff
- orig_off
;
3387 uint64_t ret
= this->set_section_list_addresses(layout
, reset
,
3390 &in_tls
, &in_relro
);
3392 // If the last section was a TLS section, align upward to the
3393 // alignment of the TLS segment, so that the overall size of the TLS
3394 // segment is aligned.
3397 uint64_t segment_align
= layout
->tls_segment()->maximum_alignment();
3398 *poff
= align_address(*poff
, segment_align
);
3401 // If all the sections were relro sections, align upward to the
3402 // common page size.
3405 uint64_t page_align
= parameters
->target().common_pagesize();
3406 *poff
= align_address(*poff
, page_align
);
3409 this->memsz_
= *poff
- orig_off
;
3411 // Ignore the file offset adjustments made by the BSS Output_data
3418 // Set the addresses and file offsets in a list of Output_data
3422 Output_segment::set_section_list_addresses(const Layout
* layout
, bool reset
,
3423 Output_data_list
* pdl
,
3424 uint64_t addr
, off_t
* poff
,
3425 unsigned int* pshndx
,
3426 bool* in_tls
, bool* in_relro
)
3428 off_t startoff
= *poff
;
3430 off_t off
= startoff
;
3431 for (Output_data_list::iterator p
= pdl
->begin();
3436 (*p
)->reset_address_and_file_offset();
3438 // When using a linker script the section will most likely
3439 // already have an address.
3440 if (!(*p
)->is_address_valid())
3442 uint64_t align
= (*p
)->addralign();
3444 if ((*p
)->is_section_flag_set(elfcpp::SHF_TLS
))
3446 // Give the first TLS section the alignment of the
3447 // entire TLS segment. Otherwise the TLS segment as a
3448 // whole may be misaligned.
3451 Output_segment
* tls_segment
= layout
->tls_segment();
3452 gold_assert(tls_segment
!= NULL
);
3453 uint64_t segment_align
= tls_segment
->maximum_alignment();
3454 gold_assert(segment_align
>= align
);
3455 align
= segment_align
;
3462 // If this is the first section after the TLS segment,
3463 // align it to at least the alignment of the TLS
3464 // segment, so that the size of the overall TLS segment
3468 uint64_t segment_align
=
3469 layout
->tls_segment()->maximum_alignment();
3470 if (segment_align
> align
)
3471 align
= segment_align
;
3477 // If this is a non-relro section after a relro section,
3478 // align it to a common page boundary so that the dynamic
3479 // linker has a page to mark as read-only.
3481 && (!(*p
)->is_section()
3482 || !(*p
)->output_section()->is_relro()))
3484 uint64_t page_align
= parameters
->target().common_pagesize();
3485 if (page_align
> align
)
3490 off
= align_address(off
, align
);
3491 (*p
)->set_address_and_file_offset(addr
+ (off
- startoff
), off
);
3495 // The script may have inserted a skip forward, but it
3496 // better not have moved backward.
3497 if ((*p
)->address() >= addr
+ (off
- startoff
))
3498 off
+= (*p
)->address() - (addr
+ (off
- startoff
));
3501 if (!layout
->script_options()->saw_sections_clause())
3505 Output_section
* os
= (*p
)->output_section();
3507 gold_error(_("dot moves backward in linker script "
3508 "from 0x%llx to 0x%llx"),
3509 addr
+ (off
- startoff
), (*p
)->address());
3511 gold_error(_("address of section '%s' moves backward "
3512 "from 0x%llx to 0x%llx"),
3513 os
->name(), addr
+ (off
- startoff
),
3517 (*p
)->set_file_offset(off
);
3518 (*p
)->finalize_data_size();
3521 // We want to ignore the size of a SHF_TLS or SHT_NOBITS
3522 // section. Such a section does not affect the size of a
3524 if (!(*p
)->is_section_flag_set(elfcpp::SHF_TLS
)
3525 || !(*p
)->is_section_type(elfcpp::SHT_NOBITS
))
3526 off
+= (*p
)->data_size();
3528 if ((*p
)->is_section())
3530 (*p
)->set_out_shndx(*pshndx
);
3536 return addr
+ (off
- startoff
);
3539 // For a non-PT_LOAD segment, set the offset from the sections, if
3543 Output_segment::set_offset()
3545 gold_assert(this->type_
!= elfcpp::PT_LOAD
);
3547 gold_assert(!this->are_addresses_set_
);
3549 if (this->output_data_
.empty() && this->output_bss_
.empty())
3553 this->are_addresses_set_
= true;
3555 this->min_p_align_
= 0;
3561 const Output_data
* first
;
3562 if (this->output_data_
.empty())
3563 first
= this->output_bss_
.front();
3565 first
= this->output_data_
.front();
3566 this->vaddr_
= first
->address();
3567 this->paddr_
= (first
->has_load_address()
3568 ? first
->load_address()
3570 this->are_addresses_set_
= true;
3571 this->offset_
= first
->offset();
3573 if (this->output_data_
.empty())
3577 const Output_data
* last_data
= this->output_data_
.back();
3578 this->filesz_
= (last_data
->address()
3579 + last_data
->data_size()
3583 const Output_data
* last
;
3584 if (this->output_bss_
.empty())
3585 last
= this->output_data_
.back();
3587 last
= this->output_bss_
.back();
3588 this->memsz_
= (last
->address()
3592 // If this is a TLS segment, align the memory size. The code in
3593 // set_section_list ensures that the section after the TLS segment
3594 // is aligned to give us room.
3595 if (this->type_
== elfcpp::PT_TLS
)
3597 uint64_t segment_align
= this->maximum_alignment();
3598 gold_assert(this->vaddr_
== align_address(this->vaddr_
, segment_align
));
3599 this->memsz_
= align_address(this->memsz_
, segment_align
);
3602 // If this is a RELRO segment, align the memory size. The code in
3603 // set_section_list ensures that the section after the RELRO segment
3604 // is aligned to give us room.
3605 if (this->type_
== elfcpp::PT_GNU_RELRO
)
3607 uint64_t page_align
= parameters
->target().common_pagesize();
3608 gold_assert(this->vaddr_
== align_address(this->vaddr_
, page_align
));
3609 this->memsz_
= align_address(this->memsz_
, page_align
);
3613 // Set the TLS offsets of the sections in the PT_TLS segment.
3616 Output_segment::set_tls_offsets()
3618 gold_assert(this->type_
== elfcpp::PT_TLS
);
3620 for (Output_data_list::iterator p
= this->output_data_
.begin();
3621 p
!= this->output_data_
.end();
3623 (*p
)->set_tls_offset(this->vaddr_
);
3625 for (Output_data_list::iterator p
= this->output_bss_
.begin();
3626 p
!= this->output_bss_
.end();
3628 (*p
)->set_tls_offset(this->vaddr_
);
3631 // Return the address of the first section.
3634 Output_segment::first_section_load_address() const
3636 for (Output_data_list::const_iterator p
= this->output_data_
.begin();
3637 p
!= this->output_data_
.end();
3639 if ((*p
)->is_section())
3640 return (*p
)->has_load_address() ? (*p
)->load_address() : (*p
)->address();
3642 for (Output_data_list::const_iterator p
= this->output_bss_
.begin();
3643 p
!= this->output_bss_
.end();
3645 if ((*p
)->is_section())
3646 return (*p
)->has_load_address() ? (*p
)->load_address() : (*p
)->address();
3651 // Return the number of Output_sections in an Output_segment.
3654 Output_segment::output_section_count() const
3656 return (this->output_section_count_list(&this->output_data_
)
3657 + this->output_section_count_list(&this->output_bss_
));
3660 // Return the number of Output_sections in an Output_data_list.
3663 Output_segment::output_section_count_list(const Output_data_list
* pdl
) const
3665 unsigned int count
= 0;
3666 for (Output_data_list::const_iterator p
= pdl
->begin();
3670 if ((*p
)->is_section())
3676 // Return the section attached to the list segment with the lowest
3677 // load address. This is used when handling a PHDRS clause in a
3681 Output_segment::section_with_lowest_load_address() const
3683 Output_section
* found
= NULL
;
3684 uint64_t found_lma
= 0;
3685 this->lowest_load_address_in_list(&this->output_data_
, &found
, &found_lma
);
3687 Output_section
* found_data
= found
;
3688 this->lowest_load_address_in_list(&this->output_bss_
, &found
, &found_lma
);
3689 if (found
!= found_data
&& found_data
!= NULL
)
3691 gold_error(_("nobits section %s may not precede progbits section %s "
3693 found
->name(), found_data
->name());
3700 // Look through a list for a section with a lower load address.
3703 Output_segment::lowest_load_address_in_list(const Output_data_list
* pdl
,
3704 Output_section
** found
,
3705 uint64_t* found_lma
) const
3707 for (Output_data_list::const_iterator p
= pdl
->begin();
3711 if (!(*p
)->is_section())
3713 Output_section
* os
= static_cast<Output_section
*>(*p
);
3714 uint64_t lma
= (os
->has_load_address()
3715 ? os
->load_address()
3717 if (*found
== NULL
|| lma
< *found_lma
)
3725 // Write the segment data into *OPHDR.
3727 template<int size
, bool big_endian
>
3729 Output_segment::write_header(elfcpp::Phdr_write
<size
, big_endian
>* ophdr
)
3731 ophdr
->put_p_type(this->type_
);
3732 ophdr
->put_p_offset(this->offset_
);
3733 ophdr
->put_p_vaddr(this->vaddr_
);
3734 ophdr
->put_p_paddr(this->paddr_
);
3735 ophdr
->put_p_filesz(this->filesz_
);
3736 ophdr
->put_p_memsz(this->memsz_
);
3737 ophdr
->put_p_flags(this->flags_
);
3738 ophdr
->put_p_align(std::max(this->min_p_align_
, this->maximum_alignment()));
3741 // Write the section headers into V.
3743 template<int size
, bool big_endian
>
3745 Output_segment::write_section_headers(const Layout
* layout
,
3746 const Stringpool
* secnamepool
,
3748 unsigned int *pshndx
) const
3750 // Every section that is attached to a segment must be attached to a
3751 // PT_LOAD segment, so we only write out section headers for PT_LOAD
3753 if (this->type_
!= elfcpp::PT_LOAD
)
3756 v
= this->write_section_headers_list
<size
, big_endian
>(layout
, secnamepool
,
3757 &this->output_data_
,
3759 v
= this->write_section_headers_list
<size
, big_endian
>(layout
, secnamepool
,
3765 template<int size
, bool big_endian
>
3767 Output_segment::write_section_headers_list(const Layout
* layout
,
3768 const Stringpool
* secnamepool
,
3769 const Output_data_list
* pdl
,
3771 unsigned int* pshndx
) const
3773 const int shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
3774 for (Output_data_list::const_iterator p
= pdl
->begin();
3778 if ((*p
)->is_section())
3780 const Output_section
* ps
= static_cast<const Output_section
*>(*p
);
3781 gold_assert(*pshndx
== ps
->out_shndx());
3782 elfcpp::Shdr_write
<size
, big_endian
> oshdr(v
);
3783 ps
->write_header(layout
, secnamepool
, &oshdr
);
3791 // Print the output sections to the map file.
3794 Output_segment::print_sections_to_mapfile(Mapfile
* mapfile
) const
3796 if (this->type() != elfcpp::PT_LOAD
)
3798 this->print_section_list_to_mapfile(mapfile
, &this->output_data_
);
3799 this->print_section_list_to_mapfile(mapfile
, &this->output_bss_
);
3802 // Print an output section list to the map file.
3805 Output_segment::print_section_list_to_mapfile(Mapfile
* mapfile
,
3806 const Output_data_list
* pdl
) const
3808 for (Output_data_list::const_iterator p
= pdl
->begin();
3811 (*p
)->print_to_mapfile(mapfile
);
3814 // Output_file methods.
3816 Output_file::Output_file(const char* name
)
3821 map_is_anonymous_(false),
3822 is_temporary_(false)
3826 // Try to open an existing file. Returns false if the file doesn't
3827 // exist, has a size of 0 or can't be mmapped.
3830 Output_file::open_for_modification()
3832 // The name "-" means "stdout".
3833 if (strcmp(this->name_
, "-") == 0)
3836 // Don't bother opening files with a size of zero.
3838 if (::stat(this->name_
, &s
) != 0 || s
.st_size
== 0)
3841 int o
= open_descriptor(-1, this->name_
, O_RDWR
, 0);
3843 gold_fatal(_("%s: open: %s"), this->name_
, strerror(errno
));
3845 this->file_size_
= s
.st_size
;
3847 // If the file can't be mmapped, copying the content to an anonymous
3848 // map will probably negate the performance benefits of incremental
3849 // linking. This could be helped by using views and loading only
3850 // the necessary parts, but this is not supported as of now.
3851 if (!this->map_no_anonymous())
3853 release_descriptor(o
, true);
3855 this->file_size_
= 0;
3862 // Open the output file.
3865 Output_file::open(off_t file_size
)
3867 this->file_size_
= file_size
;
3869 // Unlink the file first; otherwise the open() may fail if the file
3870 // is busy (e.g. it's an executable that's currently being executed).
3872 // However, the linker may be part of a system where a zero-length
3873 // file is created for it to write to, with tight permissions (gcc
3874 // 2.95 did something like this). Unlinking the file would work
3875 // around those permission controls, so we only unlink if the file
3876 // has a non-zero size. We also unlink only regular files to avoid
3877 // trouble with directories/etc.
3879 // If we fail, continue; this command is merely a best-effort attempt
3880 // to improve the odds for open().
3882 // We let the name "-" mean "stdout"
3883 if (!this->is_temporary_
)
3885 if (strcmp(this->name_
, "-") == 0)
3886 this->o_
= STDOUT_FILENO
;
3890 if (::stat(this->name_
, &s
) == 0
3891 && (S_ISREG (s
.st_mode
) || S_ISLNK (s
.st_mode
)))
3894 ::unlink(this->name_
);
3895 else if (!parameters
->options().relocatable())
3897 // If we don't unlink the existing file, add execute
3898 // permission where read permissions already exist
3899 // and where the umask permits.
3900 int mask
= ::umask(0);
3902 s
.st_mode
|= (s
.st_mode
& 0444) >> 2;
3903 ::chmod(this->name_
, s
.st_mode
& ~mask
);
3907 int mode
= parameters
->options().relocatable() ? 0666 : 0777;
3908 int o
= open_descriptor(-1, this->name_
, O_RDWR
| O_CREAT
| O_TRUNC
,
3911 gold_fatal(_("%s: open: %s"), this->name_
, strerror(errno
));
3919 // Resize the output file.
3922 Output_file::resize(off_t file_size
)
3924 // If the mmap is mapping an anonymous memory buffer, this is easy:
3925 // just mremap to the new size. If it's mapping to a file, we want
3926 // to unmap to flush to the file, then remap after growing the file.
3927 if (this->map_is_anonymous_
)
3929 void* base
= ::mremap(this->base_
, this->file_size_
, file_size
,
3931 if (base
== MAP_FAILED
)
3932 gold_fatal(_("%s: mremap: %s"), this->name_
, strerror(errno
));
3933 this->base_
= static_cast<unsigned char*>(base
);
3934 this->file_size_
= file_size
;
3939 this->file_size_
= file_size
;
3940 if (!this->map_no_anonymous())
3941 gold_fatal(_("%s: mmap: %s"), this->name_
, strerror(errno
));
3945 // Map an anonymous block of memory which will later be written to the
3946 // file. Return whether the map succeeded.
3949 Output_file::map_anonymous()
3951 void* base
= ::mmap(NULL
, this->file_size_
, PROT_READ
| PROT_WRITE
,
3952 MAP_PRIVATE
| MAP_ANONYMOUS
, -1, 0);
3953 if (base
!= MAP_FAILED
)
3955 this->map_is_anonymous_
= true;
3956 this->base_
= static_cast<unsigned char*>(base
);
3962 // Map the file into memory. Return whether the mapping succeeded.
3965 Output_file::map_no_anonymous()
3967 const int o
= this->o_
;
3969 // If the output file is not a regular file, don't try to mmap it;
3970 // instead, we'll mmap a block of memory (an anonymous buffer), and
3971 // then later write the buffer to the file.
3973 struct stat statbuf
;
3974 if (o
== STDOUT_FILENO
|| o
== STDERR_FILENO
3975 || ::fstat(o
, &statbuf
) != 0
3976 || !S_ISREG(statbuf
.st_mode
)
3977 || this->is_temporary_
)
3980 // Ensure that we have disk space available for the file. If we
3981 // don't do this, it is possible that we will call munmap, close,
3982 // and exit with dirty buffers still in the cache with no assigned
3983 // disk blocks. If the disk is out of space at that point, the
3984 // output file will wind up incomplete, but we will have already
3985 // exited. The alternative to fallocate would be to use fdatasync,
3986 // but that would be a more significant performance hit.
3987 if (::posix_fallocate(o
, 0, this->file_size_
) < 0)
3988 gold_fatal(_("%s: %s"), this->name_
, strerror(errno
));
3990 // Map the file into memory.
3991 base
= ::mmap(NULL
, this->file_size_
, PROT_READ
| PROT_WRITE
,
3994 // The mmap call might fail because of file system issues: the file
3995 // system might not support mmap at all, or it might not support
3996 // mmap with PROT_WRITE.
3997 if (base
== MAP_FAILED
)
4000 this->map_is_anonymous_
= false;
4001 this->base_
= static_cast<unsigned char*>(base
);
4005 // Map the file into memory.
4010 if (this->map_no_anonymous())
4013 // The mmap call might fail because of file system issues: the file
4014 // system might not support mmap at all, or it might not support
4015 // mmap with PROT_WRITE. I'm not sure which errno values we will
4016 // see in all cases, so if the mmap fails for any reason and we
4017 // don't care about file contents, try for an anonymous map.
4018 if (this->map_anonymous())
4021 gold_fatal(_("%s: mmap: failed to allocate %lu bytes for output file: %s"),
4022 this->name_
, static_cast<unsigned long>(this->file_size_
),
4026 // Unmap the file from memory.
4029 Output_file::unmap()
4031 if (::munmap(this->base_
, this->file_size_
) < 0)
4032 gold_error(_("%s: munmap: %s"), this->name_
, strerror(errno
));
4036 // Close the output file.
4039 Output_file::close()
4041 // If the map isn't file-backed, we need to write it now.
4042 if (this->map_is_anonymous_
&& !this->is_temporary_
)
4044 size_t bytes_to_write
= this->file_size_
;
4046 while (bytes_to_write
> 0)
4048 ssize_t bytes_written
= ::write(this->o_
, this->base_
+ offset
,
4050 if (bytes_written
== 0)
4051 gold_error(_("%s: write: unexpected 0 return-value"), this->name_
);
4052 else if (bytes_written
< 0)
4053 gold_error(_("%s: write: %s"), this->name_
, strerror(errno
));
4056 bytes_to_write
-= bytes_written
;
4057 offset
+= bytes_written
;
4063 // We don't close stdout or stderr
4064 if (this->o_
!= STDOUT_FILENO
4065 && this->o_
!= STDERR_FILENO
4066 && !this->is_temporary_
)
4067 if (::close(this->o_
) < 0)
4068 gold_error(_("%s: close: %s"), this->name_
, strerror(errno
));
4072 // Instantiate the templates we need. We could use the configure
4073 // script to restrict this to only the ones for implemented targets.
4075 #ifdef HAVE_TARGET_32_LITTLE
4078 Output_section::add_input_section
<32, false>(
4079 Sized_relobj
<32, false>* object
,
4081 const char* secname
,
4082 const elfcpp::Shdr
<32, false>& shdr
,
4083 unsigned int reloc_shndx
,
4084 bool have_sections_script
);
4087 #ifdef HAVE_TARGET_32_BIG
4090 Output_section::add_input_section
<32, true>(
4091 Sized_relobj
<32, true>* object
,
4093 const char* secname
,
4094 const elfcpp::Shdr
<32, true>& shdr
,
4095 unsigned int reloc_shndx
,
4096 bool have_sections_script
);
4099 #ifdef HAVE_TARGET_64_LITTLE
4102 Output_section::add_input_section
<64, false>(
4103 Sized_relobj
<64, false>* object
,
4105 const char* secname
,
4106 const elfcpp::Shdr
<64, false>& shdr
,
4107 unsigned int reloc_shndx
,
4108 bool have_sections_script
);
4111 #ifdef HAVE_TARGET_64_BIG
4114 Output_section::add_input_section
<64, true>(
4115 Sized_relobj
<64, true>* object
,
4117 const char* secname
,
4118 const elfcpp::Shdr
<64, true>& shdr
,
4119 unsigned int reloc_shndx
,
4120 bool have_sections_script
);
4123 #ifdef HAVE_TARGET_32_LITTLE
4125 class Output_reloc
<elfcpp::SHT_REL
, false, 32, false>;
4128 #ifdef HAVE_TARGET_32_BIG
4130 class Output_reloc
<elfcpp::SHT_REL
, false, 32, true>;
4133 #ifdef HAVE_TARGET_64_LITTLE
4135 class Output_reloc
<elfcpp::SHT_REL
, false, 64, false>;
4138 #ifdef HAVE_TARGET_64_BIG
4140 class Output_reloc
<elfcpp::SHT_REL
, false, 64, true>;
4143 #ifdef HAVE_TARGET_32_LITTLE
4145 class Output_reloc
<elfcpp::SHT_REL
, true, 32, false>;
4148 #ifdef HAVE_TARGET_32_BIG
4150 class Output_reloc
<elfcpp::SHT_REL
, true, 32, true>;
4153 #ifdef HAVE_TARGET_64_LITTLE
4155 class Output_reloc
<elfcpp::SHT_REL
, true, 64, false>;
4158 #ifdef HAVE_TARGET_64_BIG
4160 class Output_reloc
<elfcpp::SHT_REL
, true, 64, true>;
4163 #ifdef HAVE_TARGET_32_LITTLE
4165 class Output_reloc
<elfcpp::SHT_RELA
, false, 32, false>;
4168 #ifdef HAVE_TARGET_32_BIG
4170 class Output_reloc
<elfcpp::SHT_RELA
, false, 32, true>;
4173 #ifdef HAVE_TARGET_64_LITTLE
4175 class Output_reloc
<elfcpp::SHT_RELA
, false, 64, false>;
4178 #ifdef HAVE_TARGET_64_BIG
4180 class Output_reloc
<elfcpp::SHT_RELA
, false, 64, true>;
4183 #ifdef HAVE_TARGET_32_LITTLE
4185 class Output_reloc
<elfcpp::SHT_RELA
, true, 32, false>;
4188 #ifdef HAVE_TARGET_32_BIG
4190 class Output_reloc
<elfcpp::SHT_RELA
, true, 32, true>;
4193 #ifdef HAVE_TARGET_64_LITTLE
4195 class Output_reloc
<elfcpp::SHT_RELA
, true, 64, false>;
4198 #ifdef HAVE_TARGET_64_BIG
4200 class Output_reloc
<elfcpp::SHT_RELA
, true, 64, true>;
4203 #ifdef HAVE_TARGET_32_LITTLE
4205 class Output_data_reloc
<elfcpp::SHT_REL
, false, 32, false>;
4208 #ifdef HAVE_TARGET_32_BIG
4210 class Output_data_reloc
<elfcpp::SHT_REL
, false, 32, true>;
4213 #ifdef HAVE_TARGET_64_LITTLE
4215 class Output_data_reloc
<elfcpp::SHT_REL
, false, 64, false>;
4218 #ifdef HAVE_TARGET_64_BIG
4220 class Output_data_reloc
<elfcpp::SHT_REL
, false, 64, true>;
4223 #ifdef HAVE_TARGET_32_LITTLE
4225 class Output_data_reloc
<elfcpp::SHT_REL
, true, 32, false>;
4228 #ifdef HAVE_TARGET_32_BIG
4230 class Output_data_reloc
<elfcpp::SHT_REL
, true, 32, true>;
4233 #ifdef HAVE_TARGET_64_LITTLE
4235 class Output_data_reloc
<elfcpp::SHT_REL
, true, 64, false>;
4238 #ifdef HAVE_TARGET_64_BIG
4240 class Output_data_reloc
<elfcpp::SHT_REL
, true, 64, true>;
4243 #ifdef HAVE_TARGET_32_LITTLE
4245 class Output_data_reloc
<elfcpp::SHT_RELA
, false, 32, false>;
4248 #ifdef HAVE_TARGET_32_BIG
4250 class Output_data_reloc
<elfcpp::SHT_RELA
, false, 32, true>;
4253 #ifdef HAVE_TARGET_64_LITTLE
4255 class Output_data_reloc
<elfcpp::SHT_RELA
, false, 64, false>;
4258 #ifdef HAVE_TARGET_64_BIG
4260 class Output_data_reloc
<elfcpp::SHT_RELA
, false, 64, true>;
4263 #ifdef HAVE_TARGET_32_LITTLE
4265 class Output_data_reloc
<elfcpp::SHT_RELA
, true, 32, false>;
4268 #ifdef HAVE_TARGET_32_BIG
4270 class Output_data_reloc
<elfcpp::SHT_RELA
, true, 32, true>;
4273 #ifdef HAVE_TARGET_64_LITTLE
4275 class Output_data_reloc
<elfcpp::SHT_RELA
, true, 64, false>;
4278 #ifdef HAVE_TARGET_64_BIG
4280 class Output_data_reloc
<elfcpp::SHT_RELA
, true, 64, true>;
4283 #ifdef HAVE_TARGET_32_LITTLE
4285 class Output_relocatable_relocs
<elfcpp::SHT_REL
, 32, false>;
4288 #ifdef HAVE_TARGET_32_BIG
4290 class Output_relocatable_relocs
<elfcpp::SHT_REL
, 32, true>;
4293 #ifdef HAVE_TARGET_64_LITTLE
4295 class Output_relocatable_relocs
<elfcpp::SHT_REL
, 64, false>;
4298 #ifdef HAVE_TARGET_64_BIG
4300 class Output_relocatable_relocs
<elfcpp::SHT_REL
, 64, true>;
4303 #ifdef HAVE_TARGET_32_LITTLE
4305 class Output_relocatable_relocs
<elfcpp::SHT_RELA
, 32, false>;
4308 #ifdef HAVE_TARGET_32_BIG
4310 class Output_relocatable_relocs
<elfcpp::SHT_RELA
, 32, true>;
4313 #ifdef HAVE_TARGET_64_LITTLE
4315 class Output_relocatable_relocs
<elfcpp::SHT_RELA
, 64, false>;
4318 #ifdef HAVE_TARGET_64_BIG
4320 class Output_relocatable_relocs
<elfcpp::SHT_RELA
, 64, true>;
4323 #ifdef HAVE_TARGET_32_LITTLE
4325 class Output_data_group
<32, false>;
4328 #ifdef HAVE_TARGET_32_BIG
4330 class Output_data_group
<32, true>;
4333 #ifdef HAVE_TARGET_64_LITTLE
4335 class Output_data_group
<64, false>;
4338 #ifdef HAVE_TARGET_64_BIG
4340 class Output_data_group
<64, true>;
4343 #ifdef HAVE_TARGET_32_LITTLE
4345 class Output_data_got
<32, false>;
4348 #ifdef HAVE_TARGET_32_BIG
4350 class Output_data_got
<32, true>;
4353 #ifdef HAVE_TARGET_64_LITTLE
4355 class Output_data_got
<64, false>;
4358 #ifdef HAVE_TARGET_64_BIG
4360 class Output_data_got
<64, true>;
4363 } // End namespace gold.