1 // output.cc -- manage the output file for gold
3 // Copyright 2006, 2007, 2008 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" // for unlink_if_ordinary()
35 #include "parameters.h"
42 // Some BSD systems still use MAP_ANON instead of MAP_ANONYMOUS
44 # define MAP_ANONYMOUS MAP_ANON
50 // Output_data variables.
52 bool Output_data::allocated_sizes_are_fixed
;
54 // Output_data methods.
56 Output_data::~Output_data()
60 // Return the default alignment for the target size.
63 Output_data::default_alignment()
65 return Output_data::default_alignment_for_size(
66 parameters
->target().get_size());
69 // Return the default alignment for a size--32 or 64.
72 Output_data::default_alignment_for_size(int size
)
82 // Output_section_header methods. This currently assumes that the
83 // segment and section lists are complete at construction time.
85 Output_section_headers::Output_section_headers(
87 const Layout::Segment_list
* segment_list
,
88 const Layout::Section_list
* section_list
,
89 const Layout::Section_list
* unattached_section_list
,
90 const Stringpool
* secnamepool
,
91 const Output_section
* shstrtab_section
)
93 segment_list_(segment_list
),
94 section_list_(section_list
),
95 unattached_section_list_(unattached_section_list
),
96 secnamepool_(secnamepool
),
97 shstrtab_section_(shstrtab_section
)
99 // Count all the sections. Start with 1 for the null section.
101 if (!parameters
->options().relocatable())
103 for (Layout::Segment_list::const_iterator p
= segment_list
->begin();
104 p
!= segment_list
->end();
106 if ((*p
)->type() == elfcpp::PT_LOAD
)
107 count
+= (*p
)->output_section_count();
111 for (Layout::Section_list::const_iterator p
= section_list
->begin();
112 p
!= section_list
->end();
114 if (((*p
)->flags() & elfcpp::SHF_ALLOC
) != 0)
117 count
+= unattached_section_list
->size();
119 const int size
= parameters
->target().get_size();
122 shdr_size
= elfcpp::Elf_sizes
<32>::shdr_size
;
124 shdr_size
= elfcpp::Elf_sizes
<64>::shdr_size
;
128 this->set_data_size(count
* shdr_size
);
131 // Write out the section headers.
134 Output_section_headers::do_write(Output_file
* of
)
136 switch (parameters
->size_and_endianness())
138 #ifdef HAVE_TARGET_32_LITTLE
139 case Parameters::TARGET_32_LITTLE
:
140 this->do_sized_write
<32, false>(of
);
143 #ifdef HAVE_TARGET_32_BIG
144 case Parameters::TARGET_32_BIG
:
145 this->do_sized_write
<32, true>(of
);
148 #ifdef HAVE_TARGET_64_LITTLE
149 case Parameters::TARGET_64_LITTLE
:
150 this->do_sized_write
<64, false>(of
);
153 #ifdef HAVE_TARGET_64_BIG
154 case Parameters::TARGET_64_BIG
:
155 this->do_sized_write
<64, true>(of
);
163 template<int size
, bool big_endian
>
165 Output_section_headers::do_sized_write(Output_file
* of
)
167 off_t all_shdrs_size
= this->data_size();
168 unsigned char* view
= of
->get_output_view(this->offset(), all_shdrs_size
);
170 const int shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
171 unsigned char* v
= view
;
174 typename
elfcpp::Shdr_write
<size
, big_endian
> oshdr(v
);
175 oshdr
.put_sh_name(0);
176 oshdr
.put_sh_type(elfcpp::SHT_NULL
);
177 oshdr
.put_sh_flags(0);
178 oshdr
.put_sh_addr(0);
179 oshdr
.put_sh_offset(0);
181 size_t section_count
= (this->data_size()
182 / elfcpp::Elf_sizes
<size
>::shdr_size
);
183 if (section_count
< elfcpp::SHN_LORESERVE
)
184 oshdr
.put_sh_size(0);
186 oshdr
.put_sh_size(section_count
);
188 unsigned int shstrndx
= this->shstrtab_section_
->out_shndx();
189 if (shstrndx
< elfcpp::SHN_LORESERVE
)
190 oshdr
.put_sh_link(0);
192 oshdr
.put_sh_link(shstrndx
);
194 oshdr
.put_sh_info(0);
195 oshdr
.put_sh_addralign(0);
196 oshdr
.put_sh_entsize(0);
201 unsigned int shndx
= 1;
202 if (!parameters
->options().relocatable())
204 for (Layout::Segment_list::const_iterator p
=
205 this->segment_list_
->begin();
206 p
!= this->segment_list_
->end();
208 v
= (*p
)->write_section_headers
<size
, big_endian
>(this->layout_
,
215 for (Layout::Section_list::const_iterator p
=
216 this->section_list_
->begin();
217 p
!= this->section_list_
->end();
220 // We do unallocated sections below, except that group
221 // sections have to come first.
222 if (((*p
)->flags() & elfcpp::SHF_ALLOC
) == 0
223 && (*p
)->type() != elfcpp::SHT_GROUP
)
225 gold_assert(shndx
== (*p
)->out_shndx());
226 elfcpp::Shdr_write
<size
, big_endian
> oshdr(v
);
227 (*p
)->write_header(this->layout_
, this->secnamepool_
, &oshdr
);
233 for (Layout::Section_list::const_iterator p
=
234 this->unattached_section_list_
->begin();
235 p
!= this->unattached_section_list_
->end();
238 // For a relocatable link, we did unallocated group sections
239 // above, since they have to come first.
240 if ((*p
)->type() == elfcpp::SHT_GROUP
241 && parameters
->options().relocatable())
243 gold_assert(shndx
== (*p
)->out_shndx());
244 elfcpp::Shdr_write
<size
, big_endian
> oshdr(v
);
245 (*p
)->write_header(this->layout_
, this->secnamepool_
, &oshdr
);
250 of
->write_output_view(this->offset(), all_shdrs_size
, view
);
253 // Output_segment_header methods.
255 Output_segment_headers::Output_segment_headers(
256 const Layout::Segment_list
& segment_list
)
257 : segment_list_(segment_list
)
259 const int size
= parameters
->target().get_size();
262 phdr_size
= elfcpp::Elf_sizes
<32>::phdr_size
;
264 phdr_size
= elfcpp::Elf_sizes
<64>::phdr_size
;
268 this->set_data_size(segment_list
.size() * phdr_size
);
272 Output_segment_headers::do_write(Output_file
* of
)
274 switch (parameters
->size_and_endianness())
276 #ifdef HAVE_TARGET_32_LITTLE
277 case Parameters::TARGET_32_LITTLE
:
278 this->do_sized_write
<32, false>(of
);
281 #ifdef HAVE_TARGET_32_BIG
282 case Parameters::TARGET_32_BIG
:
283 this->do_sized_write
<32, true>(of
);
286 #ifdef HAVE_TARGET_64_LITTLE
287 case Parameters::TARGET_64_LITTLE
:
288 this->do_sized_write
<64, false>(of
);
291 #ifdef HAVE_TARGET_64_BIG
292 case Parameters::TARGET_64_BIG
:
293 this->do_sized_write
<64, true>(of
);
301 template<int size
, bool big_endian
>
303 Output_segment_headers::do_sized_write(Output_file
* of
)
305 const int phdr_size
= elfcpp::Elf_sizes
<size
>::phdr_size
;
306 off_t all_phdrs_size
= this->segment_list_
.size() * phdr_size
;
307 gold_assert(all_phdrs_size
== this->data_size());
308 unsigned char* view
= of
->get_output_view(this->offset(),
310 unsigned char* v
= view
;
311 for (Layout::Segment_list::const_iterator p
= this->segment_list_
.begin();
312 p
!= this->segment_list_
.end();
315 elfcpp::Phdr_write
<size
, big_endian
> ophdr(v
);
316 (*p
)->write_header(&ophdr
);
320 gold_assert(v
- view
== all_phdrs_size
);
322 of
->write_output_view(this->offset(), all_phdrs_size
, view
);
325 // Output_file_header methods.
327 Output_file_header::Output_file_header(const Target
* target
,
328 const Symbol_table
* symtab
,
329 const Output_segment_headers
* osh
,
333 segment_header_(osh
),
334 section_header_(NULL
),
338 const int size
= parameters
->target().get_size();
341 ehdr_size
= elfcpp::Elf_sizes
<32>::ehdr_size
;
343 ehdr_size
= elfcpp::Elf_sizes
<64>::ehdr_size
;
347 this->set_data_size(ehdr_size
);
350 // Set the section table information for a file header.
353 Output_file_header::set_section_info(const Output_section_headers
* shdrs
,
354 const Output_section
* shstrtab
)
356 this->section_header_
= shdrs
;
357 this->shstrtab_
= shstrtab
;
360 // Write out the file header.
363 Output_file_header::do_write(Output_file
* of
)
365 gold_assert(this->offset() == 0);
367 switch (parameters
->size_and_endianness())
369 #ifdef HAVE_TARGET_32_LITTLE
370 case Parameters::TARGET_32_LITTLE
:
371 this->do_sized_write
<32, false>(of
);
374 #ifdef HAVE_TARGET_32_BIG
375 case Parameters::TARGET_32_BIG
:
376 this->do_sized_write
<32, true>(of
);
379 #ifdef HAVE_TARGET_64_LITTLE
380 case Parameters::TARGET_64_LITTLE
:
381 this->do_sized_write
<64, false>(of
);
384 #ifdef HAVE_TARGET_64_BIG
385 case Parameters::TARGET_64_BIG
:
386 this->do_sized_write
<64, true>(of
);
394 // Write out the file header with appropriate size and endianess.
396 template<int size
, bool big_endian
>
398 Output_file_header::do_sized_write(Output_file
* of
)
400 gold_assert(this->offset() == 0);
402 int ehdr_size
= elfcpp::Elf_sizes
<size
>::ehdr_size
;
403 unsigned char* view
= of
->get_output_view(0, ehdr_size
);
404 elfcpp::Ehdr_write
<size
, big_endian
> oehdr(view
);
406 unsigned char e_ident
[elfcpp::EI_NIDENT
];
407 memset(e_ident
, 0, elfcpp::EI_NIDENT
);
408 e_ident
[elfcpp::EI_MAG0
] = elfcpp::ELFMAG0
;
409 e_ident
[elfcpp::EI_MAG1
] = elfcpp::ELFMAG1
;
410 e_ident
[elfcpp::EI_MAG2
] = elfcpp::ELFMAG2
;
411 e_ident
[elfcpp::EI_MAG3
] = elfcpp::ELFMAG3
;
413 e_ident
[elfcpp::EI_CLASS
] = elfcpp::ELFCLASS32
;
415 e_ident
[elfcpp::EI_CLASS
] = elfcpp::ELFCLASS64
;
418 e_ident
[elfcpp::EI_DATA
] = (big_endian
419 ? elfcpp::ELFDATA2MSB
420 : elfcpp::ELFDATA2LSB
);
421 e_ident
[elfcpp::EI_VERSION
] = elfcpp::EV_CURRENT
;
422 // FIXME: Some targets may need to set EI_OSABI and EI_ABIVERSION.
423 oehdr
.put_e_ident(e_ident
);
426 if (parameters
->options().relocatable())
427 e_type
= elfcpp::ET_REL
;
428 else if (parameters
->options().shared())
429 e_type
= elfcpp::ET_DYN
;
431 e_type
= elfcpp::ET_EXEC
;
432 oehdr
.put_e_type(e_type
);
434 oehdr
.put_e_machine(this->target_
->machine_code());
435 oehdr
.put_e_version(elfcpp::EV_CURRENT
);
437 oehdr
.put_e_entry(this->entry
<size
>());
439 if (this->segment_header_
== NULL
)
440 oehdr
.put_e_phoff(0);
442 oehdr
.put_e_phoff(this->segment_header_
->offset());
444 oehdr
.put_e_shoff(this->section_header_
->offset());
446 // FIXME: The target needs to set the flags.
447 oehdr
.put_e_flags(0);
449 oehdr
.put_e_ehsize(elfcpp::Elf_sizes
<size
>::ehdr_size
);
451 if (this->segment_header_
== NULL
)
453 oehdr
.put_e_phentsize(0);
454 oehdr
.put_e_phnum(0);
458 oehdr
.put_e_phentsize(elfcpp::Elf_sizes
<size
>::phdr_size
);
459 oehdr
.put_e_phnum(this->segment_header_
->data_size()
460 / elfcpp::Elf_sizes
<size
>::phdr_size
);
463 oehdr
.put_e_shentsize(elfcpp::Elf_sizes
<size
>::shdr_size
);
464 size_t section_count
= (this->section_header_
->data_size()
465 / elfcpp::Elf_sizes
<size
>::shdr_size
);
467 if (section_count
< elfcpp::SHN_LORESERVE
)
468 oehdr
.put_e_shnum(this->section_header_
->data_size()
469 / elfcpp::Elf_sizes
<size
>::shdr_size
);
471 oehdr
.put_e_shnum(0);
473 unsigned int shstrndx
= this->shstrtab_
->out_shndx();
474 if (shstrndx
< elfcpp::SHN_LORESERVE
)
475 oehdr
.put_e_shstrndx(this->shstrtab_
->out_shndx());
477 oehdr
.put_e_shstrndx(elfcpp::SHN_XINDEX
);
479 of
->write_output_view(0, ehdr_size
, view
);
482 // Return the value to use for the entry address. THIS->ENTRY_ is the
483 // symbol specified on the command line, if any.
486 typename
elfcpp::Elf_types
<size
>::Elf_Addr
487 Output_file_header::entry()
489 const bool should_issue_warning
= (this->entry_
!= NULL
490 && !parameters
->options().relocatable()
491 && !parameters
->options().shared());
493 // FIXME: Need to support target specific entry symbol.
494 const char* entry
= this->entry_
;
498 Symbol
* sym
= this->symtab_
->lookup(entry
);
500 typename Sized_symbol
<size
>::Value_type v
;
503 Sized_symbol
<size
>* ssym
;
504 ssym
= this->symtab_
->get_sized_symbol
<size
>(sym
);
505 if (!ssym
->is_defined() && should_issue_warning
)
506 gold_warning("entry symbol '%s' exists but is not defined", entry
);
511 // We couldn't find the entry symbol. See if we can parse it as
512 // a number. This supports, e.g., -e 0x1000.
514 v
= strtoull(entry
, &endptr
, 0);
517 if (should_issue_warning
)
518 gold_warning("cannot find entry symbol '%s'", entry
);
526 // Output_data_const methods.
529 Output_data_const::do_write(Output_file
* of
)
531 of
->write(this->offset(), this->data_
.data(), this->data_
.size());
534 // Output_data_const_buffer methods.
537 Output_data_const_buffer::do_write(Output_file
* of
)
539 of
->write(this->offset(), this->p_
, this->data_size());
542 // Output_section_data methods.
544 // Record the output section, and set the entry size and such.
547 Output_section_data::set_output_section(Output_section
* os
)
549 gold_assert(this->output_section_
== NULL
);
550 this->output_section_
= os
;
551 this->do_adjust_output_section(os
);
554 // Return the section index of the output section.
557 Output_section_data::do_out_shndx() const
559 gold_assert(this->output_section_
!= NULL
);
560 return this->output_section_
->out_shndx();
563 // Set the alignment, which means we may need to update the alignment
564 // of the output section.
567 Output_section_data::set_addralign(uint64_t addralign
)
569 this->addralign_
= addralign
;
570 if (this->output_section_
!= NULL
571 && this->output_section_
->addralign() < addralign
)
572 this->output_section_
->set_addralign(addralign
);
575 // Output_data_strtab methods.
577 // Set the final data size.
580 Output_data_strtab::set_final_data_size()
582 this->strtab_
->set_string_offsets();
583 this->set_data_size(this->strtab_
->get_strtab_size());
586 // Write out a string table.
589 Output_data_strtab::do_write(Output_file
* of
)
591 this->strtab_
->write(of
, this->offset());
594 // Output_reloc methods.
596 // A reloc against a global symbol.
598 template<bool dynamic
, int size
, bool big_endian
>
599 Output_reloc
<elfcpp::SHT_REL
, dynamic
, size
, big_endian
>::Output_reloc(
605 : address_(address
), local_sym_index_(GSYM_CODE
), type_(type
),
606 is_relative_(is_relative
), is_section_symbol_(false), shndx_(INVALID_CODE
)
608 // this->type_ is a bitfield; make sure TYPE fits.
609 gold_assert(this->type_
== type
);
610 this->u1_
.gsym
= gsym
;
613 this->set_needs_dynsym_index();
616 template<bool dynamic
, int size
, bool big_endian
>
617 Output_reloc
<elfcpp::SHT_REL
, dynamic
, size
, big_endian
>::Output_reloc(
624 : address_(address
), local_sym_index_(GSYM_CODE
), type_(type
),
625 is_relative_(is_relative
), is_section_symbol_(false), shndx_(shndx
)
627 gold_assert(shndx
!= INVALID_CODE
);
628 // this->type_ is a bitfield; make sure TYPE fits.
629 gold_assert(this->type_
== type
);
630 this->u1_
.gsym
= gsym
;
631 this->u2_
.relobj
= relobj
;
633 this->set_needs_dynsym_index();
636 // A reloc against a local symbol.
638 template<bool dynamic
, int size
, bool big_endian
>
639 Output_reloc
<elfcpp::SHT_REL
, dynamic
, size
, big_endian
>::Output_reloc(
640 Sized_relobj
<size
, big_endian
>* relobj
,
641 unsigned int local_sym_index
,
646 bool is_section_symbol
)
647 : address_(address
), local_sym_index_(local_sym_index
), type_(type
),
648 is_relative_(is_relative
), is_section_symbol_(is_section_symbol
),
651 gold_assert(local_sym_index
!= GSYM_CODE
652 && local_sym_index
!= INVALID_CODE
);
653 // this->type_ is a bitfield; make sure TYPE fits.
654 gold_assert(this->type_
== type
);
655 this->u1_
.relobj
= relobj
;
658 this->set_needs_dynsym_index();
661 template<bool dynamic
, int size
, bool big_endian
>
662 Output_reloc
<elfcpp::SHT_REL
, dynamic
, size
, big_endian
>::Output_reloc(
663 Sized_relobj
<size
, big_endian
>* relobj
,
664 unsigned int local_sym_index
,
669 bool is_section_symbol
)
670 : address_(address
), local_sym_index_(local_sym_index
), type_(type
),
671 is_relative_(is_relative
), is_section_symbol_(is_section_symbol
),
674 gold_assert(local_sym_index
!= GSYM_CODE
675 && local_sym_index
!= INVALID_CODE
);
676 gold_assert(shndx
!= INVALID_CODE
);
677 // this->type_ is a bitfield; make sure TYPE fits.
678 gold_assert(this->type_
== type
);
679 this->u1_
.relobj
= relobj
;
680 this->u2_
.relobj
= relobj
;
682 this->set_needs_dynsym_index();
685 // A reloc against the STT_SECTION symbol of an output section.
687 template<bool dynamic
, int size
, bool big_endian
>
688 Output_reloc
<elfcpp::SHT_REL
, dynamic
, size
, big_endian
>::Output_reloc(
693 : address_(address
), local_sym_index_(SECTION_CODE
), type_(type
),
694 is_relative_(false), is_section_symbol_(true), shndx_(INVALID_CODE
)
696 // this->type_ is a bitfield; make sure TYPE fits.
697 gold_assert(this->type_
== type
);
701 this->set_needs_dynsym_index();
703 os
->set_needs_symtab_index();
706 template<bool dynamic
, int size
, bool big_endian
>
707 Output_reloc
<elfcpp::SHT_REL
, dynamic
, size
, big_endian
>::Output_reloc(
713 : address_(address
), local_sym_index_(SECTION_CODE
), type_(type
),
714 is_relative_(false), is_section_symbol_(true), shndx_(shndx
)
716 gold_assert(shndx
!= INVALID_CODE
);
717 // this->type_ is a bitfield; make sure TYPE fits.
718 gold_assert(this->type_
== type
);
720 this->u2_
.relobj
= relobj
;
722 this->set_needs_dynsym_index();
724 os
->set_needs_symtab_index();
727 // Record that we need a dynamic symbol index for this relocation.
729 template<bool dynamic
, int size
, bool big_endian
>
731 Output_reloc
<elfcpp::SHT_REL
, dynamic
, size
, big_endian
>::
732 set_needs_dynsym_index()
734 if (this->is_relative_
)
736 switch (this->local_sym_index_
)
742 this->u1_
.gsym
->set_needs_dynsym_entry();
746 this->u1_
.os
->set_needs_dynsym_index();
754 const unsigned int lsi
= this->local_sym_index_
;
755 if (!this->is_section_symbol_
)
756 this->u1_
.relobj
->set_needs_output_dynsym_entry(lsi
);
759 section_offset_type dummy
;
760 Output_section
* os
= this->u1_
.relobj
->output_section(lsi
, &dummy
);
761 gold_assert(os
!= NULL
);
762 os
->set_needs_dynsym_index();
769 // Get the symbol index of a relocation.
771 template<bool dynamic
, int size
, bool big_endian
>
773 Output_reloc
<elfcpp::SHT_REL
, dynamic
, size
, big_endian
>::get_symbol_index()
777 switch (this->local_sym_index_
)
783 if (this->u1_
.gsym
== NULL
)
786 index
= this->u1_
.gsym
->dynsym_index();
788 index
= this->u1_
.gsym
->symtab_index();
793 index
= this->u1_
.os
->dynsym_index();
795 index
= this->u1_
.os
->symtab_index();
799 // Relocations without symbols use a symbol index of 0.
805 const unsigned int lsi
= this->local_sym_index_
;
806 if (!this->is_section_symbol_
)
809 index
= this->u1_
.relobj
->dynsym_index(lsi
);
811 index
= this->u1_
.relobj
->symtab_index(lsi
);
815 section_offset_type dummy
;
816 Output_section
* os
= this->u1_
.relobj
->output_section(lsi
, &dummy
);
817 gold_assert(os
!= NULL
);
819 index
= os
->dynsym_index();
821 index
= os
->symtab_index();
826 gold_assert(index
!= -1U);
830 // For a local section symbol, get the address of the offset ADDEND
831 // within the input section.
833 template<bool dynamic
, int size
, bool big_endian
>
835 Output_reloc
<elfcpp::SHT_REL
, dynamic
, size
, big_endian
>::
836 local_section_offset(Addend addend
) const
838 gold_assert(this->local_sym_index_
!= GSYM_CODE
839 && this->local_sym_index_
!= SECTION_CODE
840 && this->local_sym_index_
!= INVALID_CODE
841 && this->is_section_symbol_
);
842 const unsigned int lsi
= this->local_sym_index_
;
843 section_offset_type offset
;
844 Output_section
* os
= this->u1_
.relobj
->output_section(lsi
, &offset
);
845 gold_assert(os
!= NULL
);
847 return offset
+ addend
;
848 // This is a merge section.
849 offset
= os
->output_address(this->u1_
.relobj
, lsi
, addend
);
850 gold_assert(offset
!= -1);
854 // Write out the offset and info fields of a Rel or Rela relocation
857 template<bool dynamic
, int size
, bool big_endian
>
858 template<typename Write_rel
>
860 Output_reloc
<elfcpp::SHT_REL
, dynamic
, size
, big_endian
>::write_rel(
863 Address address
= this->address_
;
864 if (this->shndx_
!= INVALID_CODE
)
866 section_offset_type off
;
867 Output_section
* os
= this->u2_
.relobj
->output_section(this->shndx_
,
869 gold_assert(os
!= NULL
);
871 address
+= os
->address() + off
;
874 address
= os
->output_address(this->u2_
.relobj
, this->shndx_
,
876 gold_assert(address
!= -1U);
879 else if (this->u2_
.od
!= NULL
)
880 address
+= this->u2_
.od
->address();
881 wr
->put_r_offset(address
);
882 unsigned int sym_index
= this->is_relative_
? 0 : this->get_symbol_index();
883 wr
->put_r_info(elfcpp::elf_r_info
<size
>(sym_index
, this->type_
));
886 // Write out a Rel relocation.
888 template<bool dynamic
, int size
, bool big_endian
>
890 Output_reloc
<elfcpp::SHT_REL
, dynamic
, size
, big_endian
>::write(
891 unsigned char* pov
) const
893 elfcpp::Rel_write
<size
, big_endian
> orel(pov
);
894 this->write_rel(&orel
);
897 // Get the value of the symbol referred to by a Rel relocation.
899 template<bool dynamic
, int size
, bool big_endian
>
900 typename
elfcpp::Elf_types
<size
>::Elf_Addr
901 Output_reloc
<elfcpp::SHT_REL
, dynamic
, size
, big_endian
>::symbol_value(
904 if (this->local_sym_index_
== GSYM_CODE
)
906 const Sized_symbol
<size
>* sym
;
907 sym
= static_cast<const Sized_symbol
<size
>*>(this->u1_
.gsym
);
908 return sym
->value() + addend
;
910 gold_assert(this->local_sym_index_
!= SECTION_CODE
911 && this->local_sym_index_
!= INVALID_CODE
912 && !this->is_section_symbol_
);
913 const unsigned int lsi
= this->local_sym_index_
;
914 const Symbol_value
<size
>* symval
= this->u1_
.relobj
->local_symbol(lsi
);
915 return symval
->value(this->u1_
.relobj
, addend
);
918 // Write out a Rela relocation.
920 template<bool dynamic
, int size
, bool big_endian
>
922 Output_reloc
<elfcpp::SHT_RELA
, dynamic
, size
, big_endian
>::write(
923 unsigned char* pov
) const
925 elfcpp::Rela_write
<size
, big_endian
> orel(pov
);
926 this->rel_
.write_rel(&orel
);
927 Addend addend
= this->addend_
;
928 if (this->rel_
.is_relative())
929 addend
= this->rel_
.symbol_value(addend
);
930 else if (this->rel_
.is_local_section_symbol())
931 addend
= this->rel_
.local_section_offset(addend
);
932 orel
.put_r_addend(addend
);
935 // Output_data_reloc_base methods.
937 // Adjust the output section.
939 template<int sh_type
, bool dynamic
, int size
, bool big_endian
>
941 Output_data_reloc_base
<sh_type
, dynamic
, size
, big_endian
>
942 ::do_adjust_output_section(Output_section
* os
)
944 if (sh_type
== elfcpp::SHT_REL
)
945 os
->set_entsize(elfcpp::Elf_sizes
<size
>::rel_size
);
946 else if (sh_type
== elfcpp::SHT_RELA
)
947 os
->set_entsize(elfcpp::Elf_sizes
<size
>::rela_size
);
951 os
->set_should_link_to_dynsym();
953 os
->set_should_link_to_symtab();
956 // Write out relocation data.
958 template<int sh_type
, bool dynamic
, int size
, bool big_endian
>
960 Output_data_reloc_base
<sh_type
, dynamic
, size
, big_endian
>::do_write(
963 const off_t off
= this->offset();
964 const off_t oview_size
= this->data_size();
965 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
967 unsigned char* pov
= oview
;
968 for (typename
Relocs::const_iterator p
= this->relocs_
.begin();
969 p
!= this->relocs_
.end();
976 gold_assert(pov
- oview
== oview_size
);
978 of
->write_output_view(off
, oview_size
, oview
);
980 // We no longer need the relocation entries.
981 this->relocs_
.clear();
984 // Class Output_relocatable_relocs.
986 template<int sh_type
, int size
, bool big_endian
>
988 Output_relocatable_relocs
<sh_type
, size
, big_endian
>::set_final_data_size()
990 this->set_data_size(this->rr_
->output_reloc_count()
991 * Reloc_types
<sh_type
, size
, big_endian
>::reloc_size
);
994 // class Output_data_group.
996 template<int size
, bool big_endian
>
997 Output_data_group
<size
, big_endian
>::Output_data_group(
998 Sized_relobj
<size
, big_endian
>* relobj
,
999 section_size_type entry_count
,
1000 const elfcpp::Elf_Word
* contents
)
1001 : Output_section_data(entry_count
* 4, 4),
1004 this->flags_
= elfcpp::Swap
<32, big_endian
>::readval(contents
);
1005 for (section_size_type i
= 1; i
< entry_count
; ++i
)
1007 unsigned int shndx
= elfcpp::Swap
<32, big_endian
>::readval(contents
+ i
);
1008 this->input_sections_
.push_back(shndx
);
1012 // Write out the section group, which means translating the section
1013 // indexes to apply to the output file.
1015 template<int size
, bool big_endian
>
1017 Output_data_group
<size
, big_endian
>::do_write(Output_file
* of
)
1019 const off_t off
= this->offset();
1020 const section_size_type oview_size
=
1021 convert_to_section_size_type(this->data_size());
1022 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
1024 elfcpp::Elf_Word
* contents
= reinterpret_cast<elfcpp::Elf_Word
*>(oview
);
1025 elfcpp::Swap
<32, big_endian
>::writeval(contents
, this->flags_
);
1028 for (std::vector
<unsigned int>::const_iterator p
=
1029 this->input_sections_
.begin();
1030 p
!= this->input_sections_
.end();
1033 section_offset_type dummy
;
1034 Output_section
* os
= this->relobj_
->output_section(*p
, &dummy
);
1036 unsigned int output_shndx
;
1038 output_shndx
= os
->out_shndx();
1041 this->relobj_
->error(_("section group retained but "
1042 "group element discarded"));
1046 elfcpp::Swap
<32, big_endian
>::writeval(contents
, output_shndx
);
1049 size_t wrote
= reinterpret_cast<unsigned char*>(contents
) - oview
;
1050 gold_assert(wrote
== oview_size
);
1052 of
->write_output_view(off
, oview_size
, oview
);
1054 // We no longer need this information.
1055 this->input_sections_
.clear();
1058 // Output_data_got::Got_entry methods.
1060 // Write out the entry.
1062 template<int size
, bool big_endian
>
1064 Output_data_got
<size
, big_endian
>::Got_entry::write(unsigned char* pov
) const
1068 switch (this->local_sym_index_
)
1072 // If the symbol is resolved locally, we need to write out the
1073 // link-time value, which will be relocated dynamically by a
1074 // RELATIVE relocation.
1075 Symbol
* gsym
= this->u_
.gsym
;
1076 Sized_symbol
<size
>* sgsym
;
1077 // This cast is a bit ugly. We don't want to put a
1078 // virtual method in Symbol, because we want Symbol to be
1079 // as small as possible.
1080 sgsym
= static_cast<Sized_symbol
<size
>*>(gsym
);
1081 val
= sgsym
->value();
1086 val
= this->u_
.constant
;
1091 const unsigned int lsi
= this->local_sym_index_
;
1092 const Symbol_value
<size
>* symval
= this->u_
.object
->local_symbol(lsi
);
1093 val
= symval
->value(this->u_
.object
, 0);
1098 elfcpp::Swap
<size
, big_endian
>::writeval(pov
, val
);
1101 // Output_data_got methods.
1103 // Add an entry for a global symbol to the GOT. This returns true if
1104 // this is a new GOT entry, false if the symbol already had a GOT
1107 template<int size
, bool big_endian
>
1109 Output_data_got
<size
, big_endian
>::add_global(
1111 unsigned int got_type
)
1113 if (gsym
->has_got_offset(got_type
))
1116 this->entries_
.push_back(Got_entry(gsym
));
1117 this->set_got_size();
1118 gsym
->set_got_offset(got_type
, this->last_got_offset());
1122 // Add an entry for a global symbol to the GOT, and add a dynamic
1123 // relocation of type R_TYPE for the GOT entry.
1124 template<int size
, bool big_endian
>
1126 Output_data_got
<size
, big_endian
>::add_global_with_rel(
1128 unsigned int got_type
,
1130 unsigned int r_type
)
1132 if (gsym
->has_got_offset(got_type
))
1135 this->entries_
.push_back(Got_entry());
1136 this->set_got_size();
1137 unsigned int got_offset
= this->last_got_offset();
1138 gsym
->set_got_offset(got_type
, got_offset
);
1139 rel_dyn
->add_global(gsym
, r_type
, this, got_offset
);
1142 template<int size
, bool big_endian
>
1144 Output_data_got
<size
, big_endian
>::add_global_with_rela(
1146 unsigned int got_type
,
1148 unsigned int r_type
)
1150 if (gsym
->has_got_offset(got_type
))
1153 this->entries_
.push_back(Got_entry());
1154 this->set_got_size();
1155 unsigned int got_offset
= this->last_got_offset();
1156 gsym
->set_got_offset(got_type
, got_offset
);
1157 rela_dyn
->add_global(gsym
, r_type
, this, got_offset
, 0);
1160 // Add a pair of entries for a global symbol to the GOT, and add
1161 // dynamic relocations of type R_TYPE_1 and R_TYPE_2, respectively.
1162 // If R_TYPE_2 == 0, add the second entry with no relocation.
1163 template<int size
, bool big_endian
>
1165 Output_data_got
<size
, big_endian
>::add_global_pair_with_rel(
1167 unsigned int got_type
,
1169 unsigned int r_type_1
,
1170 unsigned int r_type_2
)
1172 if (gsym
->has_got_offset(got_type
))
1175 this->entries_
.push_back(Got_entry());
1176 unsigned int got_offset
= this->last_got_offset();
1177 gsym
->set_got_offset(got_type
, got_offset
);
1178 rel_dyn
->add_global(gsym
, r_type_1
, this, got_offset
);
1180 this->entries_
.push_back(Got_entry());
1183 got_offset
= this->last_got_offset();
1184 rel_dyn
->add_global(gsym
, r_type_2
, this, got_offset
);
1187 this->set_got_size();
1190 template<int size
, bool big_endian
>
1192 Output_data_got
<size
, big_endian
>::add_global_pair_with_rela(
1194 unsigned int got_type
,
1196 unsigned int r_type_1
,
1197 unsigned int r_type_2
)
1199 if (gsym
->has_got_offset(got_type
))
1202 this->entries_
.push_back(Got_entry());
1203 unsigned int got_offset
= this->last_got_offset();
1204 gsym
->set_got_offset(got_type
, got_offset
);
1205 rela_dyn
->add_global(gsym
, r_type_1
, this, got_offset
, 0);
1207 this->entries_
.push_back(Got_entry());
1210 got_offset
= this->last_got_offset();
1211 rela_dyn
->add_global(gsym
, r_type_2
, this, got_offset
, 0);
1214 this->set_got_size();
1217 // Add an entry for a local symbol to the GOT. This returns true if
1218 // this is a new GOT entry, false if the symbol already has a GOT
1221 template<int size
, bool big_endian
>
1223 Output_data_got
<size
, big_endian
>::add_local(
1224 Sized_relobj
<size
, big_endian
>* object
,
1225 unsigned int symndx
,
1226 unsigned int got_type
)
1228 if (object
->local_has_got_offset(symndx
, got_type
))
1231 this->entries_
.push_back(Got_entry(object
, symndx
));
1232 this->set_got_size();
1233 object
->set_local_got_offset(symndx
, got_type
, this->last_got_offset());
1237 // Add an entry for a local symbol to the GOT, and add a dynamic
1238 // relocation of type R_TYPE for the GOT entry.
1239 template<int size
, bool big_endian
>
1241 Output_data_got
<size
, big_endian
>::add_local_with_rel(
1242 Sized_relobj
<size
, big_endian
>* object
,
1243 unsigned int symndx
,
1244 unsigned int got_type
,
1246 unsigned int r_type
)
1248 if (object
->local_has_got_offset(symndx
, got_type
))
1251 this->entries_
.push_back(Got_entry());
1252 this->set_got_size();
1253 unsigned int got_offset
= this->last_got_offset();
1254 object
->set_local_got_offset(symndx
, got_type
, got_offset
);
1255 rel_dyn
->add_local(object
, symndx
, r_type
, this, got_offset
);
1258 template<int size
, bool big_endian
>
1260 Output_data_got
<size
, big_endian
>::add_local_with_rela(
1261 Sized_relobj
<size
, big_endian
>* object
,
1262 unsigned int symndx
,
1263 unsigned int got_type
,
1265 unsigned int r_type
)
1267 if (object
->local_has_got_offset(symndx
, got_type
))
1270 this->entries_
.push_back(Got_entry());
1271 this->set_got_size();
1272 unsigned int got_offset
= this->last_got_offset();
1273 object
->set_local_got_offset(symndx
, got_type
, got_offset
);
1274 rela_dyn
->add_local(object
, symndx
, r_type
, this, got_offset
, 0);
1277 // Add a pair of entries for a local symbol to the GOT, and add
1278 // dynamic relocations of type R_TYPE_1 and R_TYPE_2, respectively.
1279 // If R_TYPE_2 == 0, add the second entry with no relocation.
1280 template<int size
, bool big_endian
>
1282 Output_data_got
<size
, big_endian
>::add_local_pair_with_rel(
1283 Sized_relobj
<size
, big_endian
>* object
,
1284 unsigned int symndx
,
1286 unsigned int got_type
,
1288 unsigned int r_type_1
,
1289 unsigned int r_type_2
)
1291 if (object
->local_has_got_offset(symndx
, got_type
))
1294 this->entries_
.push_back(Got_entry());
1295 unsigned int got_offset
= this->last_got_offset();
1296 object
->set_local_got_offset(symndx
, got_type
, got_offset
);
1297 section_offset_type off
;
1298 Output_section
* os
= object
->output_section(shndx
, &off
);
1299 rel_dyn
->add_output_section(os
, r_type_1
, this, got_offset
);
1301 this->entries_
.push_back(Got_entry(object
, symndx
));
1304 got_offset
= this->last_got_offset();
1305 rel_dyn
->add_output_section(os
, r_type_2
, this, got_offset
);
1308 this->set_got_size();
1311 template<int size
, bool big_endian
>
1313 Output_data_got
<size
, big_endian
>::add_local_pair_with_rela(
1314 Sized_relobj
<size
, big_endian
>* object
,
1315 unsigned int symndx
,
1317 unsigned int got_type
,
1319 unsigned int r_type_1
,
1320 unsigned int r_type_2
)
1322 if (object
->local_has_got_offset(symndx
, got_type
))
1325 this->entries_
.push_back(Got_entry());
1326 unsigned int got_offset
= this->last_got_offset();
1327 object
->set_local_got_offset(symndx
, got_type
, got_offset
);
1328 section_offset_type off
;
1329 Output_section
* os
= object
->output_section(shndx
, &off
);
1330 rela_dyn
->add_output_section(os
, r_type_1
, this, got_offset
, 0);
1332 this->entries_
.push_back(Got_entry(object
, symndx
));
1335 got_offset
= this->last_got_offset();
1336 rela_dyn
->add_output_section(os
, r_type_2
, this, got_offset
, 0);
1339 this->set_got_size();
1342 // Write out the GOT.
1344 template<int size
, bool big_endian
>
1346 Output_data_got
<size
, big_endian
>::do_write(Output_file
* of
)
1348 const int add
= size
/ 8;
1350 const off_t off
= this->offset();
1351 const off_t oview_size
= this->data_size();
1352 unsigned char* const oview
= of
->get_output_view(off
, oview_size
);
1354 unsigned char* pov
= oview
;
1355 for (typename
Got_entries::const_iterator p
= this->entries_
.begin();
1356 p
!= this->entries_
.end();
1363 gold_assert(pov
- oview
== oview_size
);
1365 of
->write_output_view(off
, oview_size
, oview
);
1367 // We no longer need the GOT entries.
1368 this->entries_
.clear();
1371 // Output_data_dynamic::Dynamic_entry methods.
1373 // Write out the entry.
1375 template<int size
, bool big_endian
>
1377 Output_data_dynamic::Dynamic_entry::write(
1379 const Stringpool
* pool
) const
1381 typename
elfcpp::Elf_types
<size
>::Elf_WXword val
;
1382 switch (this->offset_
)
1384 case DYNAMIC_NUMBER
:
1388 case DYNAMIC_SECTION_SIZE
:
1389 val
= this->u_
.od
->data_size();
1392 case DYNAMIC_SYMBOL
:
1394 const Sized_symbol
<size
>* s
=
1395 static_cast<const Sized_symbol
<size
>*>(this->u_
.sym
);
1400 case DYNAMIC_STRING
:
1401 val
= pool
->get_offset(this->u_
.str
);
1405 val
= this->u_
.od
->address() + this->offset_
;
1409 elfcpp::Dyn_write
<size
, big_endian
> dw(pov
);
1410 dw
.put_d_tag(this->tag_
);
1414 // Output_data_dynamic methods.
1416 // Adjust the output section to set the entry size.
1419 Output_data_dynamic::do_adjust_output_section(Output_section
* os
)
1421 if (parameters
->target().get_size() == 32)
1422 os
->set_entsize(elfcpp::Elf_sizes
<32>::dyn_size
);
1423 else if (parameters
->target().get_size() == 64)
1424 os
->set_entsize(elfcpp::Elf_sizes
<64>::dyn_size
);
1429 // Set the final data size.
1432 Output_data_dynamic::set_final_data_size()
1434 // Add the terminating entry.
1435 this->add_constant(elfcpp::DT_NULL
, 0);
1438 if (parameters
->target().get_size() == 32)
1439 dyn_size
= elfcpp::Elf_sizes
<32>::dyn_size
;
1440 else if (parameters
->target().get_size() == 64)
1441 dyn_size
= elfcpp::Elf_sizes
<64>::dyn_size
;
1444 this->set_data_size(this->entries_
.size() * dyn_size
);
1447 // Write out the dynamic entries.
1450 Output_data_dynamic::do_write(Output_file
* of
)
1452 switch (parameters
->size_and_endianness())
1454 #ifdef HAVE_TARGET_32_LITTLE
1455 case Parameters::TARGET_32_LITTLE
:
1456 this->sized_write
<32, false>(of
);
1459 #ifdef HAVE_TARGET_32_BIG
1460 case Parameters::TARGET_32_BIG
:
1461 this->sized_write
<32, true>(of
);
1464 #ifdef HAVE_TARGET_64_LITTLE
1465 case Parameters::TARGET_64_LITTLE
:
1466 this->sized_write
<64, false>(of
);
1469 #ifdef HAVE_TARGET_64_BIG
1470 case Parameters::TARGET_64_BIG
:
1471 this->sized_write
<64, true>(of
);
1479 template<int size
, bool big_endian
>
1481 Output_data_dynamic::sized_write(Output_file
* of
)
1483 const int dyn_size
= elfcpp::Elf_sizes
<size
>::dyn_size
;
1485 const off_t offset
= this->offset();
1486 const off_t oview_size
= this->data_size();
1487 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
1489 unsigned char* pov
= oview
;
1490 for (typename
Dynamic_entries::const_iterator p
= this->entries_
.begin();
1491 p
!= this->entries_
.end();
1494 p
->write
<size
, big_endian
>(pov
, this->pool_
);
1498 gold_assert(pov
- oview
== oview_size
);
1500 of
->write_output_view(offset
, oview_size
, oview
);
1502 // We no longer need the dynamic entries.
1503 this->entries_
.clear();
1506 // Class Output_symtab_xindex.
1509 Output_symtab_xindex::do_write(Output_file
* of
)
1511 const off_t offset
= this->offset();
1512 const off_t oview_size
= this->data_size();
1513 unsigned char* const oview
= of
->get_output_view(offset
, oview_size
);
1515 memset(oview
, 0, oview_size
);
1517 if (parameters
->target().is_big_endian())
1518 this->endian_do_write
<true>(oview
);
1520 this->endian_do_write
<false>(oview
);
1522 of
->write_output_view(offset
, oview_size
, oview
);
1524 // We no longer need the data.
1525 this->entries_
.clear();
1528 template<bool big_endian
>
1530 Output_symtab_xindex::endian_do_write(unsigned char* const oview
)
1532 for (Xindex_entries::const_iterator p
= this->entries_
.begin();
1533 p
!= this->entries_
.end();
1535 elfcpp::Swap
<32, big_endian
>::writeval(oview
+ p
->first
* 4, p
->second
);
1538 // Output_section::Input_section methods.
1540 // Return the data size. For an input section we store the size here.
1541 // For an Output_section_data, we have to ask it for the size.
1544 Output_section::Input_section::data_size() const
1546 if (this->is_input_section())
1547 return this->u1_
.data_size
;
1549 return this->u2_
.posd
->data_size();
1552 // Set the address and file offset.
1555 Output_section::Input_section::set_address_and_file_offset(
1558 off_t section_file_offset
)
1560 if (this->is_input_section())
1561 this->u2_
.object
->set_section_offset(this->shndx_
,
1562 file_offset
- section_file_offset
);
1564 this->u2_
.posd
->set_address_and_file_offset(address
, file_offset
);
1567 // Reset the address and file offset.
1570 Output_section::Input_section::reset_address_and_file_offset()
1572 if (!this->is_input_section())
1573 this->u2_
.posd
->reset_address_and_file_offset();
1576 // Finalize the data size.
1579 Output_section::Input_section::finalize_data_size()
1581 if (!this->is_input_section())
1582 this->u2_
.posd
->finalize_data_size();
1585 // Try to turn an input offset into an output offset. We want to
1586 // return the output offset relative to the start of this
1587 // Input_section in the output section.
1590 Output_section::Input_section::output_offset(
1591 const Relobj
* object
,
1593 section_offset_type offset
,
1594 section_offset_type
*poutput
) const
1596 if (!this->is_input_section())
1597 return this->u2_
.posd
->output_offset(object
, shndx
, offset
, poutput
);
1600 if (this->shndx_
!= shndx
|| this->u2_
.object
!= object
)
1607 // Return whether this is the merge section for the input section
1611 Output_section::Input_section::is_merge_section_for(const Relobj
* object
,
1612 unsigned int shndx
) const
1614 if (this->is_input_section())
1616 return this->u2_
.posd
->is_merge_section_for(object
, shndx
);
1619 // Write out the data. We don't have to do anything for an input
1620 // section--they are handled via Object::relocate--but this is where
1621 // we write out the data for an Output_section_data.
1624 Output_section::Input_section::write(Output_file
* of
)
1626 if (!this->is_input_section())
1627 this->u2_
.posd
->write(of
);
1630 // Write the data to a buffer. As for write(), we don't have to do
1631 // anything for an input section.
1634 Output_section::Input_section::write_to_buffer(unsigned char* buffer
)
1636 if (!this->is_input_section())
1637 this->u2_
.posd
->write_to_buffer(buffer
);
1640 // Output_section methods.
1642 // Construct an Output_section. NAME will point into a Stringpool.
1644 Output_section::Output_section(const char* name
, elfcpp::Elf_Word type
,
1645 elfcpp::Elf_Xword flags
)
1650 link_section_(NULL
),
1652 info_section_(NULL
),
1661 first_input_offset_(0),
1663 postprocessing_buffer_(NULL
),
1664 needs_symtab_index_(false),
1665 needs_dynsym_index_(false),
1666 should_link_to_symtab_(false),
1667 should_link_to_dynsym_(false),
1668 after_input_sections_(false),
1669 requires_postprocessing_(false),
1670 found_in_sections_clause_(false),
1671 has_load_address_(false),
1672 info_uses_section_index_(false),
1673 may_sort_attached_input_sections_(false),
1674 must_sort_attached_input_sections_(false),
1675 attached_input_sections_are_sorted_(false),
1678 // An unallocated section has no address. Forcing this means that
1679 // we don't need special treatment for symbols defined in debug
1681 if ((flags
& elfcpp::SHF_ALLOC
) == 0)
1682 this->set_address(0);
1685 Output_section::~Output_section()
1689 // Set the entry size.
1692 Output_section::set_entsize(uint64_t v
)
1694 if (this->entsize_
== 0)
1697 gold_assert(this->entsize_
== v
);
1700 // Add the input section SHNDX, with header SHDR, named SECNAME, in
1701 // OBJECT, to the Output_section. RELOC_SHNDX is the index of a
1702 // relocation section which applies to this section, or 0 if none, or
1703 // -1U if more than one. Return the offset of the input section
1704 // within the output section. Return -1 if the input section will
1705 // receive special handling. In the normal case we don't always keep
1706 // track of input sections for an Output_section. Instead, each
1707 // Object keeps track of the Output_section for each of its input
1708 // sections. However, if HAVE_SECTIONS_SCRIPT is true, we do keep
1709 // track of input sections here; this is used when SECTIONS appears in
1712 template<int size
, bool big_endian
>
1714 Output_section::add_input_section(Sized_relobj
<size
, big_endian
>* object
,
1716 const char* secname
,
1717 const elfcpp::Shdr
<size
, big_endian
>& shdr
,
1718 unsigned int reloc_shndx
,
1719 bool have_sections_script
)
1721 elfcpp::Elf_Xword addralign
= shdr
.get_sh_addralign();
1722 if ((addralign
& (addralign
- 1)) != 0)
1724 object
->error(_("invalid alignment %lu for section \"%s\""),
1725 static_cast<unsigned long>(addralign
), secname
);
1729 if (addralign
> this->addralign_
)
1730 this->addralign_
= addralign
;
1732 typename
elfcpp::Elf_types
<size
>::Elf_WXword sh_flags
= shdr
.get_sh_flags();
1733 this->update_flags_for_input_section(sh_flags
);
1735 uint64_t entsize
= shdr
.get_sh_entsize();
1737 // .debug_str is a mergeable string section, but is not always so
1738 // marked by compilers. Mark manually here so we can optimize.
1739 if (strcmp(secname
, ".debug_str") == 0)
1741 sh_flags
|= (elfcpp::SHF_MERGE
| elfcpp::SHF_STRINGS
);
1745 // If this is a SHF_MERGE section, we pass all the input sections to
1746 // a Output_data_merge. We don't try to handle relocations for such
1748 if ((sh_flags
& elfcpp::SHF_MERGE
) != 0
1749 && reloc_shndx
== 0)
1751 if (this->add_merge_input_section(object
, shndx
, sh_flags
,
1752 entsize
, addralign
))
1754 // Tell the relocation routines that they need to call the
1755 // output_offset method to determine the final address.
1760 off_t offset_in_section
= this->current_data_size_for_child();
1761 off_t aligned_offset_in_section
= align_address(offset_in_section
,
1764 if (aligned_offset_in_section
> offset_in_section
1765 && !have_sections_script
1766 && (sh_flags
& elfcpp::SHF_EXECINSTR
) != 0
1767 && object
->target()->has_code_fill())
1769 // We need to add some fill data. Using fill_list_ when
1770 // possible is an optimization, since we will often have fill
1771 // sections without input sections.
1772 off_t fill_len
= aligned_offset_in_section
- offset_in_section
;
1773 if (this->input_sections_
.empty())
1774 this->fills_
.push_back(Fill(offset_in_section
, fill_len
));
1777 // FIXME: When relaxing, the size needs to adjust to
1778 // maintain a constant alignment.
1779 std::string
fill_data(object
->target()->code_fill(fill_len
));
1780 Output_data_const
* odc
= new Output_data_const(fill_data
, 1);
1781 this->input_sections_
.push_back(Input_section(odc
));
1785 this->set_current_data_size_for_child(aligned_offset_in_section
1786 + shdr
.get_sh_size());
1788 // We need to keep track of this section if we are already keeping
1789 // track of sections, or if we are relaxing. Also, if this is a
1790 // section which requires sorting, or which may require sorting in
1791 // the future, we keep track of the sections. FIXME: Add test for
1793 if (have_sections_script
1794 || !this->input_sections_
.empty()
1795 || this->may_sort_attached_input_sections()
1796 || this->must_sort_attached_input_sections())
1797 this->input_sections_
.push_back(Input_section(object
, shndx
,
1801 return aligned_offset_in_section
;
1804 // Add arbitrary data to an output section.
1807 Output_section::add_output_section_data(Output_section_data
* posd
)
1809 Input_section
inp(posd
);
1810 this->add_output_section_data(&inp
);
1812 if (posd
->is_data_size_valid())
1814 off_t offset_in_section
= this->current_data_size_for_child();
1815 off_t aligned_offset_in_section
= align_address(offset_in_section
,
1817 this->set_current_data_size_for_child(aligned_offset_in_section
1818 + posd
->data_size());
1822 // Add arbitrary data to an output section by Input_section.
1825 Output_section::add_output_section_data(Input_section
* inp
)
1827 if (this->input_sections_
.empty())
1828 this->first_input_offset_
= this->current_data_size_for_child();
1830 this->input_sections_
.push_back(*inp
);
1832 uint64_t addralign
= inp
->addralign();
1833 if (addralign
> this->addralign_
)
1834 this->addralign_
= addralign
;
1836 inp
->set_output_section(this);
1839 // Add a merge section to an output section.
1842 Output_section::add_output_merge_section(Output_section_data
* posd
,
1843 bool is_string
, uint64_t entsize
)
1845 Input_section
inp(posd
, is_string
, entsize
);
1846 this->add_output_section_data(&inp
);
1849 // Add an input section to a SHF_MERGE section.
1852 Output_section::add_merge_input_section(Relobj
* object
, unsigned int shndx
,
1853 uint64_t flags
, uint64_t entsize
,
1856 bool is_string
= (flags
& elfcpp::SHF_STRINGS
) != 0;
1858 // We only merge strings if the alignment is not more than the
1859 // character size. This could be handled, but it's unusual.
1860 if (is_string
&& addralign
> entsize
)
1863 Input_section_list::iterator p
;
1864 for (p
= this->input_sections_
.begin();
1865 p
!= this->input_sections_
.end();
1867 if (p
->is_merge_section(is_string
, entsize
, addralign
))
1869 p
->add_input_section(object
, shndx
);
1873 // We handle the actual constant merging in Output_merge_data or
1874 // Output_merge_string_data.
1875 Output_section_data
* posd
;
1877 posd
= new Output_merge_data(entsize
, addralign
);
1883 posd
= new Output_merge_string
<char>(addralign
);
1886 posd
= new Output_merge_string
<uint16_t>(addralign
);
1889 posd
= new Output_merge_string
<uint32_t>(addralign
);
1896 this->add_output_merge_section(posd
, is_string
, entsize
);
1897 posd
->add_input_section(object
, shndx
);
1902 // Given an address OFFSET relative to the start of input section
1903 // SHNDX in OBJECT, return whether this address is being included in
1904 // the final link. This should only be called if SHNDX in OBJECT has
1905 // a special mapping.
1908 Output_section::is_input_address_mapped(const Relobj
* object
,
1912 gold_assert(object
->is_section_specially_mapped(shndx
));
1914 for (Input_section_list::const_iterator p
= this->input_sections_
.begin();
1915 p
!= this->input_sections_
.end();
1918 section_offset_type output_offset
;
1919 if (p
->output_offset(object
, shndx
, offset
, &output_offset
))
1920 return output_offset
!= -1;
1923 // By default we assume that the address is mapped. This should
1924 // only be called after we have passed all sections to Layout. At
1925 // that point we should know what we are discarding.
1929 // Given an address OFFSET relative to the start of input section
1930 // SHNDX in object OBJECT, return the output offset relative to the
1931 // start of the input section in the output section. This should only
1932 // be called if SHNDX in OBJECT has a special mapping.
1935 Output_section::output_offset(const Relobj
* object
, unsigned int shndx
,
1936 section_offset_type offset
) const
1938 gold_assert(object
->is_section_specially_mapped(shndx
));
1939 // This can only be called meaningfully when layout is complete.
1940 gold_assert(Output_data::is_layout_complete());
1942 for (Input_section_list::const_iterator p
= this->input_sections_
.begin();
1943 p
!= this->input_sections_
.end();
1946 section_offset_type output_offset
;
1947 if (p
->output_offset(object
, shndx
, offset
, &output_offset
))
1948 return output_offset
;
1953 // Return the output virtual address of OFFSET relative to the start
1954 // of input section SHNDX in object OBJECT.
1957 Output_section::output_address(const Relobj
* object
, unsigned int shndx
,
1960 gold_assert(object
->is_section_specially_mapped(shndx
));
1962 uint64_t addr
= this->address() + this->first_input_offset_
;
1963 for (Input_section_list::const_iterator p
= this->input_sections_
.begin();
1964 p
!= this->input_sections_
.end();
1967 addr
= align_address(addr
, p
->addralign());
1968 section_offset_type output_offset
;
1969 if (p
->output_offset(object
, shndx
, offset
, &output_offset
))
1971 if (output_offset
== -1)
1973 return addr
+ output_offset
;
1975 addr
+= p
->data_size();
1978 // If we get here, it means that we don't know the mapping for this
1979 // input section. This might happen in principle if
1980 // add_input_section were called before add_output_section_data.
1981 // But it should never actually happen.
1986 // Return the output address of the start of the merged section for
1987 // input section SHNDX in object OBJECT.
1990 Output_section::starting_output_address(const Relobj
* object
,
1991 unsigned int shndx
) const
1993 gold_assert(object
->is_section_specially_mapped(shndx
));
1995 uint64_t addr
= this->address() + this->first_input_offset_
;
1996 for (Input_section_list::const_iterator p
= this->input_sections_
.begin();
1997 p
!= this->input_sections_
.end();
2000 addr
= align_address(addr
, p
->addralign());
2002 // It would be nice if we could use the existing output_offset
2003 // method to get the output offset of input offset 0.
2004 // Unfortunately we don't know for sure that input offset 0 is
2006 if (p
->is_merge_section_for(object
, shndx
))
2009 addr
+= p
->data_size();
2014 // Set the data size of an Output_section. This is where we handle
2015 // setting the addresses of any Output_section_data objects.
2018 Output_section::set_final_data_size()
2020 if (this->input_sections_
.empty())
2022 this->set_data_size(this->current_data_size_for_child());
2026 if (this->must_sort_attached_input_sections())
2027 this->sort_attached_input_sections();
2029 uint64_t address
= this->address();
2030 off_t startoff
= this->offset();
2031 off_t off
= startoff
+ this->first_input_offset_
;
2032 for (Input_section_list::iterator p
= this->input_sections_
.begin();
2033 p
!= this->input_sections_
.end();
2036 off
= align_address(off
, p
->addralign());
2037 p
->set_address_and_file_offset(address
+ (off
- startoff
), off
,
2039 off
+= p
->data_size();
2042 this->set_data_size(off
- startoff
);
2045 // Reset the address and file offset.
2048 Output_section::do_reset_address_and_file_offset()
2050 for (Input_section_list::iterator p
= this->input_sections_
.begin();
2051 p
!= this->input_sections_
.end();
2053 p
->reset_address_and_file_offset();
2056 // Set the TLS offset. Called only for SHT_TLS sections.
2059 Output_section::do_set_tls_offset(uint64_t tls_base
)
2061 this->tls_offset_
= this->address() - tls_base
;
2064 // In a few cases we need to sort the input sections attached to an
2065 // output section. This is used to implement the type of constructor
2066 // priority ordering implemented by the GNU linker, in which the
2067 // priority becomes part of the section name and the sections are
2068 // sorted by name. We only do this for an output section if we see an
2069 // attached input section matching ".ctor.*", ".dtor.*",
2070 // ".init_array.*" or ".fini_array.*".
2072 class Output_section::Input_section_sort_entry
2075 Input_section_sort_entry()
2076 : input_section_(), index_(-1U), section_has_name_(false),
2080 Input_section_sort_entry(const Input_section
& input_section
,
2082 : input_section_(input_section
), index_(index
),
2083 section_has_name_(input_section
.is_input_section())
2085 if (this->section_has_name_
)
2087 // This is only called single-threaded from Layout::finalize,
2088 // so it is OK to lock. Unfortunately we have no way to pass
2090 const Task
* dummy_task
= reinterpret_cast<const Task
*>(-1);
2091 Object
* obj
= input_section
.relobj();
2092 Task_lock_obj
<Object
> tl(dummy_task
, obj
);
2094 // This is a slow operation, which should be cached in
2095 // Layout::layout if this becomes a speed problem.
2096 this->section_name_
= obj
->section_name(input_section
.shndx());
2100 // Return the Input_section.
2101 const Input_section
&
2102 input_section() const
2104 gold_assert(this->index_
!= -1U);
2105 return this->input_section_
;
2108 // The index of this entry in the original list. This is used to
2109 // make the sort stable.
2113 gold_assert(this->index_
!= -1U);
2114 return this->index_
;
2117 // Whether there is a section name.
2119 section_has_name() const
2120 { return this->section_has_name_
; }
2122 // The section name.
2124 section_name() const
2126 gold_assert(this->section_has_name_
);
2127 return this->section_name_
;
2130 // Return true if the section name has a priority. This is assumed
2131 // to be true if it has a dot after the initial dot.
2133 has_priority() const
2135 gold_assert(this->section_has_name_
);
2136 return this->section_name_
.find('.', 1);
2139 // Return true if this an input file whose base name matches
2140 // FILE_NAME. The base name must have an extension of ".o", and
2141 // must be exactly FILE_NAME.o or FILE_NAME, one character, ".o".
2142 // This is to match crtbegin.o as well as crtbeginS.o without
2143 // getting confused by other possibilities. Overall matching the
2144 // file name this way is a dreadful hack, but the GNU linker does it
2145 // in order to better support gcc, and we need to be compatible.
2147 match_file_name(const char* match_file_name
) const
2149 const std::string
& file_name(this->input_section_
.relobj()->name());
2150 const char* base_name
= lbasename(file_name
.c_str());
2151 size_t match_len
= strlen(match_file_name
);
2152 if (strncmp(base_name
, match_file_name
, match_len
) != 0)
2154 size_t base_len
= strlen(base_name
);
2155 if (base_len
!= match_len
+ 2 && base_len
!= match_len
+ 3)
2157 return memcmp(base_name
+ base_len
- 2, ".o", 2) == 0;
2161 // The Input_section we are sorting.
2162 Input_section input_section_
;
2163 // The index of this Input_section in the original list.
2164 unsigned int index_
;
2165 // Whether this Input_section has a section name--it won't if this
2166 // is some random Output_section_data.
2167 bool section_has_name_
;
2168 // The section name if there is one.
2169 std::string section_name_
;
2172 // Return true if S1 should come before S2 in the output section.
2175 Output_section::Input_section_sort_compare::operator()(
2176 const Output_section::Input_section_sort_entry
& s1
,
2177 const Output_section::Input_section_sort_entry
& s2
) const
2179 // crtbegin.o must come first.
2180 bool s1_begin
= s1
.match_file_name("crtbegin");
2181 bool s2_begin
= s2
.match_file_name("crtbegin");
2182 if (s1_begin
|| s2_begin
)
2188 return s1
.index() < s2
.index();
2191 // crtend.o must come last.
2192 bool s1_end
= s1
.match_file_name("crtend");
2193 bool s2_end
= s2
.match_file_name("crtend");
2194 if (s1_end
|| s2_end
)
2200 return s1
.index() < s2
.index();
2203 // We sort all the sections with no names to the end.
2204 if (!s1
.section_has_name() || !s2
.section_has_name())
2206 if (s1
.section_has_name())
2208 if (s2
.section_has_name())
2210 return s1
.index() < s2
.index();
2213 // A section with a priority follows a section without a priority.
2214 // The GNU linker does this for all but .init_array sections; until
2215 // further notice we'll assume that that is an mistake.
2216 bool s1_has_priority
= s1
.has_priority();
2217 bool s2_has_priority
= s2
.has_priority();
2218 if (s1_has_priority
&& !s2_has_priority
)
2220 if (!s1_has_priority
&& s2_has_priority
)
2223 // Otherwise we sort by name.
2224 int compare
= s1
.section_name().compare(s2
.section_name());
2228 // Otherwise we keep the input order.
2229 return s1
.index() < s2
.index();
2232 // Sort the input sections attached to an output section.
2235 Output_section::sort_attached_input_sections()
2237 if (this->attached_input_sections_are_sorted_
)
2240 // The only thing we know about an input section is the object and
2241 // the section index. We need the section name. Recomputing this
2242 // is slow but this is an unusual case. If this becomes a speed
2243 // problem we can cache the names as required in Layout::layout.
2245 // We start by building a larger vector holding a copy of each
2246 // Input_section, plus its current index in the list and its name.
2247 std::vector
<Input_section_sort_entry
> sort_list
;
2250 for (Input_section_list::iterator p
= this->input_sections_
.begin();
2251 p
!= this->input_sections_
.end();
2253 sort_list
.push_back(Input_section_sort_entry(*p
, i
));
2255 // Sort the input sections.
2256 std::sort(sort_list
.begin(), sort_list
.end(), Input_section_sort_compare());
2258 // Copy the sorted input sections back to our list.
2259 this->input_sections_
.clear();
2260 for (std::vector
<Input_section_sort_entry
>::iterator p
= sort_list
.begin();
2261 p
!= sort_list
.end();
2263 this->input_sections_
.push_back(p
->input_section());
2265 // Remember that we sorted the input sections, since we might get
2267 this->attached_input_sections_are_sorted_
= true;
2270 // Write the section header to *OSHDR.
2272 template<int size
, bool big_endian
>
2274 Output_section::write_header(const Layout
* layout
,
2275 const Stringpool
* secnamepool
,
2276 elfcpp::Shdr_write
<size
, big_endian
>* oshdr
) const
2278 oshdr
->put_sh_name(secnamepool
->get_offset(this->name_
));
2279 oshdr
->put_sh_type(this->type_
);
2281 elfcpp::Elf_Xword flags
= this->flags_
;
2282 if (this->info_section_
!= NULL
&& this->info_uses_section_index_
)
2283 flags
|= elfcpp::SHF_INFO_LINK
;
2284 oshdr
->put_sh_flags(flags
);
2286 oshdr
->put_sh_addr(this->address());
2287 oshdr
->put_sh_offset(this->offset());
2288 oshdr
->put_sh_size(this->data_size());
2289 if (this->link_section_
!= NULL
)
2290 oshdr
->put_sh_link(this->link_section_
->out_shndx());
2291 else if (this->should_link_to_symtab_
)
2292 oshdr
->put_sh_link(layout
->symtab_section()->out_shndx());
2293 else if (this->should_link_to_dynsym_
)
2294 oshdr
->put_sh_link(layout
->dynsym_section()->out_shndx());
2296 oshdr
->put_sh_link(this->link_
);
2298 elfcpp::Elf_Word info
;
2299 if (this->info_section_
!= NULL
)
2301 if (this->info_uses_section_index_
)
2302 info
= this->info_section_
->out_shndx();
2304 info
= this->info_section_
->symtab_index();
2306 else if (this->info_symndx_
!= NULL
)
2307 info
= this->info_symndx_
->symtab_index();
2310 oshdr
->put_sh_info(info
);
2312 oshdr
->put_sh_addralign(this->addralign_
);
2313 oshdr
->put_sh_entsize(this->entsize_
);
2316 // Write out the data. For input sections the data is written out by
2317 // Object::relocate, but we have to handle Output_section_data objects
2321 Output_section::do_write(Output_file
* of
)
2323 gold_assert(!this->requires_postprocessing());
2325 off_t output_section_file_offset
= this->offset();
2326 for (Fill_list::iterator p
= this->fills_
.begin();
2327 p
!= this->fills_
.end();
2330 std::string
fill_data(parameters
->target().code_fill(p
->length()));
2331 of
->write(output_section_file_offset
+ p
->section_offset(),
2332 fill_data
.data(), fill_data
.size());
2335 for (Input_section_list::iterator p
= this->input_sections_
.begin();
2336 p
!= this->input_sections_
.end();
2341 // If a section requires postprocessing, create the buffer to use.
2344 Output_section::create_postprocessing_buffer()
2346 gold_assert(this->requires_postprocessing());
2348 if (this->postprocessing_buffer_
!= NULL
)
2351 if (!this->input_sections_
.empty())
2353 off_t off
= this->first_input_offset_
;
2354 for (Input_section_list::iterator p
= this->input_sections_
.begin();
2355 p
!= this->input_sections_
.end();
2358 off
= align_address(off
, p
->addralign());
2359 p
->finalize_data_size();
2360 off
+= p
->data_size();
2362 this->set_current_data_size_for_child(off
);
2365 off_t buffer_size
= this->current_data_size_for_child();
2366 this->postprocessing_buffer_
= new unsigned char[buffer_size
];
2369 // Write all the data of an Output_section into the postprocessing
2370 // buffer. This is used for sections which require postprocessing,
2371 // such as compression. Input sections are handled by
2372 // Object::Relocate.
2375 Output_section::write_to_postprocessing_buffer()
2377 gold_assert(this->requires_postprocessing());
2379 unsigned char* buffer
= this->postprocessing_buffer();
2380 for (Fill_list::iterator p
= this->fills_
.begin();
2381 p
!= this->fills_
.end();
2384 std::string
fill_data(parameters
->target().code_fill(p
->length()));
2385 memcpy(buffer
+ p
->section_offset(), fill_data
.data(),
2389 off_t off
= this->first_input_offset_
;
2390 for (Input_section_list::iterator p
= this->input_sections_
.begin();
2391 p
!= this->input_sections_
.end();
2394 off
= align_address(off
, p
->addralign());
2395 p
->write_to_buffer(buffer
+ off
);
2396 off
+= p
->data_size();
2400 // Get the input sections for linker script processing. We leave
2401 // behind the Output_section_data entries. Note that this may be
2402 // slightly incorrect for merge sections. We will leave them behind,
2403 // but it is possible that the script says that they should follow
2404 // some other input sections, as in:
2405 // .rodata { *(.rodata) *(.rodata.cst*) }
2406 // For that matter, we don't handle this correctly:
2407 // .rodata { foo.o(.rodata.cst*) *(.rodata.cst*) }
2408 // With luck this will never matter.
2411 Output_section::get_input_sections(
2413 const std::string
& fill
,
2414 std::list
<std::pair
<Relobj
*, unsigned int> >* input_sections
)
2416 uint64_t orig_address
= address
;
2418 address
= align_address(address
, this->addralign());
2420 Input_section_list remaining
;
2421 for (Input_section_list::iterator p
= this->input_sections_
.begin();
2422 p
!= this->input_sections_
.end();
2425 if (p
->is_input_section())
2426 input_sections
->push_back(std::make_pair(p
->relobj(), p
->shndx()));
2429 uint64_t aligned_address
= align_address(address
, p
->addralign());
2430 if (aligned_address
!= address
&& !fill
.empty())
2432 section_size_type length
=
2433 convert_to_section_size_type(aligned_address
- address
);
2434 std::string this_fill
;
2435 this_fill
.reserve(length
);
2436 while (this_fill
.length() + fill
.length() <= length
)
2438 if (this_fill
.length() < length
)
2439 this_fill
.append(fill
, 0, length
- this_fill
.length());
2441 Output_section_data
* posd
= new Output_data_const(this_fill
, 0);
2442 remaining
.push_back(Input_section(posd
));
2444 address
= aligned_address
;
2446 remaining
.push_back(*p
);
2448 p
->finalize_data_size();
2449 address
+= p
->data_size();
2453 this->input_sections_
.swap(remaining
);
2454 this->first_input_offset_
= 0;
2456 uint64_t data_size
= address
- orig_address
;
2457 this->set_current_data_size_for_child(data_size
);
2461 // Add an input section from a script.
2464 Output_section::add_input_section_for_script(Relobj
* object
,
2469 if (addralign
> this->addralign_
)
2470 this->addralign_
= addralign
;
2472 off_t offset_in_section
= this->current_data_size_for_child();
2473 off_t aligned_offset_in_section
= align_address(offset_in_section
,
2476 this->set_current_data_size_for_child(aligned_offset_in_section
2479 this->input_sections_
.push_back(Input_section(object
, shndx
,
2480 data_size
, addralign
));
2483 // Print stats for merge sections to stderr.
2486 Output_section::print_merge_stats()
2488 Input_section_list::iterator p
;
2489 for (p
= this->input_sections_
.begin();
2490 p
!= this->input_sections_
.end();
2492 p
->print_merge_stats(this->name_
);
2495 // Output segment methods.
2497 Output_segment::Output_segment(elfcpp::Elf_Word type
, elfcpp::Elf_Word flags
)
2509 is_max_align_known_(false),
2510 are_addresses_set_(false)
2514 // Add an Output_section to an Output_segment.
2517 Output_segment::add_output_section(Output_section
* os
,
2518 elfcpp::Elf_Word seg_flags
,
2521 gold_assert((os
->flags() & elfcpp::SHF_ALLOC
) != 0);
2522 gold_assert(!this->is_max_align_known_
);
2524 // Update the segment flags.
2525 this->flags_
|= seg_flags
;
2527 Output_segment::Output_data_list
* pdl
;
2528 if (os
->type() == elfcpp::SHT_NOBITS
)
2529 pdl
= &this->output_bss_
;
2531 pdl
= &this->output_data_
;
2533 // So that PT_NOTE segments will work correctly, we need to ensure
2534 // that all SHT_NOTE sections are adjacent. This will normally
2535 // happen automatically, because all the SHT_NOTE input sections
2536 // will wind up in the same output section. However, it is possible
2537 // for multiple SHT_NOTE input sections to have different section
2538 // flags, and thus be in different output sections, but for the
2539 // different section flags to map into the same segment flags and
2540 // thus the same output segment.
2542 // Note that while there may be many input sections in an output
2543 // section, there are normally only a few output sections in an
2544 // output segment. This loop is expected to be fast.
2546 if (os
->type() == elfcpp::SHT_NOTE
&& !pdl
->empty())
2548 Output_segment::Output_data_list::iterator p
= pdl
->end();
2552 if ((*p
)->is_section_type(elfcpp::SHT_NOTE
))
2554 // We don't worry about the FRONT parameter.
2560 while (p
!= pdl
->begin());
2563 // Similarly, so that PT_TLS segments will work, we need to group
2564 // SHF_TLS sections. An SHF_TLS/SHT_NOBITS section is a special
2565 // case: we group the SHF_TLS/SHT_NOBITS sections right after the
2566 // SHF_TLS/SHT_PROGBITS sections. This lets us set up PT_TLS
2567 // correctly. SHF_TLS sections get added to both a PT_LOAD segment
2568 // and the PT_TLS segment -- we do this grouping only for the
2570 if (this->type_
!= elfcpp::PT_TLS
2571 && (os
->flags() & elfcpp::SHF_TLS
) != 0
2572 && !this->output_data_
.empty())
2574 pdl
= &this->output_data_
;
2575 bool nobits
= os
->type() == elfcpp::SHT_NOBITS
;
2576 bool sawtls
= false;
2577 Output_segment::Output_data_list::iterator p
= pdl
->end();
2582 if ((*p
)->is_section_flag_set(elfcpp::SHF_TLS
))
2585 // Put a NOBITS section after the first TLS section.
2586 // But a PROGBITS section after the first TLS/PROGBITS
2588 insert
= nobits
|| !(*p
)->is_section_type(elfcpp::SHT_NOBITS
);
2592 // If we've gone past the TLS sections, but we've seen a
2593 // TLS section, then we need to insert this section now.
2599 // We don't worry about the FRONT parameter.
2605 while (p
!= pdl
->begin());
2607 // There are no TLS sections yet; put this one at the requested
2608 // location in the section list.
2612 pdl
->push_front(os
);
2617 // Remove an Output_section from this segment. It is an error if it
2621 Output_segment::remove_output_section(Output_section
* os
)
2623 // We only need this for SHT_PROGBITS.
2624 gold_assert(os
->type() == elfcpp::SHT_PROGBITS
);
2625 for (Output_data_list::iterator p
= this->output_data_
.begin();
2626 p
!= this->output_data_
.end();
2631 this->output_data_
.erase(p
);
2638 // Add an Output_data (which is not an Output_section) to the start of
2642 Output_segment::add_initial_output_data(Output_data
* od
)
2644 gold_assert(!this->is_max_align_known_
);
2645 this->output_data_
.push_front(od
);
2648 // Return the maximum alignment of the Output_data in Output_segment.
2651 Output_segment::maximum_alignment()
2653 if (!this->is_max_align_known_
)
2657 addralign
= Output_segment::maximum_alignment_list(&this->output_data_
);
2658 if (addralign
> this->max_align_
)
2659 this->max_align_
= addralign
;
2661 addralign
= Output_segment::maximum_alignment_list(&this->output_bss_
);
2662 if (addralign
> this->max_align_
)
2663 this->max_align_
= addralign
;
2665 this->is_max_align_known_
= true;
2668 return this->max_align_
;
2671 // Return the maximum alignment of a list of Output_data.
2674 Output_segment::maximum_alignment_list(const Output_data_list
* pdl
)
2677 for (Output_data_list::const_iterator p
= pdl
->begin();
2681 uint64_t addralign
= (*p
)->addralign();
2682 if (addralign
> ret
)
2688 // Return the number of dynamic relocs applied to this segment.
2691 Output_segment::dynamic_reloc_count() const
2693 return (this->dynamic_reloc_count_list(&this->output_data_
)
2694 + this->dynamic_reloc_count_list(&this->output_bss_
));
2697 // Return the number of dynamic relocs applied to an Output_data_list.
2700 Output_segment::dynamic_reloc_count_list(const Output_data_list
* pdl
) const
2702 unsigned int count
= 0;
2703 for (Output_data_list::const_iterator p
= pdl
->begin();
2706 count
+= (*p
)->dynamic_reloc_count();
2710 // Set the section addresses for an Output_segment. If RESET is true,
2711 // reset the addresses first. ADDR is the address and *POFF is the
2712 // file offset. Set the section indexes starting with *PSHNDX.
2713 // Return the address of the immediately following segment. Update
2714 // *POFF and *PSHNDX.
2717 Output_segment::set_section_addresses(const Layout
* layout
, bool reset
,
2718 uint64_t addr
, off_t
* poff
,
2719 unsigned int* pshndx
)
2721 gold_assert(this->type_
== elfcpp::PT_LOAD
);
2723 if (!reset
&& this->are_addresses_set_
)
2725 gold_assert(this->paddr_
== addr
);
2726 addr
= this->vaddr_
;
2730 this->vaddr_
= addr
;
2731 this->paddr_
= addr
;
2732 this->are_addresses_set_
= true;
2735 bool in_tls
= false;
2737 off_t orig_off
= *poff
;
2738 this->offset_
= orig_off
;
2740 addr
= this->set_section_list_addresses(layout
, reset
, &this->output_data_
,
2741 addr
, poff
, pshndx
, &in_tls
);
2742 this->filesz_
= *poff
- orig_off
;
2746 uint64_t ret
= this->set_section_list_addresses(layout
, reset
,
2751 // If the last section was a TLS section, align upward to the
2752 // alignment of the TLS segment, so that the overall size of the TLS
2753 // segment is aligned.
2756 uint64_t segment_align
= layout
->tls_segment()->maximum_alignment();
2757 *poff
= align_address(*poff
, segment_align
);
2760 this->memsz_
= *poff
- orig_off
;
2762 // Ignore the file offset adjustments made by the BSS Output_data
2769 // Set the addresses and file offsets in a list of Output_data
2773 Output_segment::set_section_list_addresses(const Layout
* layout
, bool reset
,
2774 Output_data_list
* pdl
,
2775 uint64_t addr
, off_t
* poff
,
2776 unsigned int* pshndx
,
2779 off_t startoff
= *poff
;
2781 off_t off
= startoff
;
2782 for (Output_data_list::iterator p
= pdl
->begin();
2787 (*p
)->reset_address_and_file_offset();
2789 // When using a linker script the section will most likely
2790 // already have an address.
2791 if (!(*p
)->is_address_valid())
2793 uint64_t align
= (*p
)->addralign();
2795 if ((*p
)->is_section_flag_set(elfcpp::SHF_TLS
))
2797 // Give the first TLS section the alignment of the
2798 // entire TLS segment. Otherwise the TLS segment as a
2799 // whole may be misaligned.
2802 Output_segment
* tls_segment
= layout
->tls_segment();
2803 gold_assert(tls_segment
!= NULL
);
2804 uint64_t segment_align
= tls_segment
->maximum_alignment();
2805 gold_assert(segment_align
>= align
);
2806 align
= segment_align
;
2813 // If this is the first section after the TLS segment,
2814 // align it to at least the alignment of the TLS
2815 // segment, so that the size of the overall TLS segment
2819 uint64_t segment_align
=
2820 layout
->tls_segment()->maximum_alignment();
2821 if (segment_align
> align
)
2822 align
= segment_align
;
2828 off
= align_address(off
, align
);
2829 (*p
)->set_address_and_file_offset(addr
+ (off
- startoff
), off
);
2833 // The script may have inserted a skip forward, but it
2834 // better not have moved backward.
2835 gold_assert((*p
)->address() >= addr
+ (off
- startoff
));
2836 off
+= (*p
)->address() - (addr
+ (off
- startoff
));
2837 (*p
)->set_file_offset(off
);
2838 (*p
)->finalize_data_size();
2841 // We want to ignore the size of a SHF_TLS or SHT_NOBITS
2842 // section. Such a section does not affect the size of a
2844 if (!(*p
)->is_section_flag_set(elfcpp::SHF_TLS
)
2845 || !(*p
)->is_section_type(elfcpp::SHT_NOBITS
))
2846 off
+= (*p
)->data_size();
2848 if ((*p
)->is_section())
2850 (*p
)->set_out_shndx(*pshndx
);
2856 return addr
+ (off
- startoff
);
2859 // For a non-PT_LOAD segment, set the offset from the sections, if
2863 Output_segment::set_offset()
2865 gold_assert(this->type_
!= elfcpp::PT_LOAD
);
2867 gold_assert(!this->are_addresses_set_
);
2869 if (this->output_data_
.empty() && this->output_bss_
.empty())
2873 this->are_addresses_set_
= true;
2875 this->min_p_align_
= 0;
2881 const Output_data
* first
;
2882 if (this->output_data_
.empty())
2883 first
= this->output_bss_
.front();
2885 first
= this->output_data_
.front();
2886 this->vaddr_
= first
->address();
2887 this->paddr_
= (first
->has_load_address()
2888 ? first
->load_address()
2890 this->are_addresses_set_
= true;
2891 this->offset_
= first
->offset();
2893 if (this->output_data_
.empty())
2897 const Output_data
* last_data
= this->output_data_
.back();
2898 this->filesz_
= (last_data
->address()
2899 + last_data
->data_size()
2903 const Output_data
* last
;
2904 if (this->output_bss_
.empty())
2905 last
= this->output_data_
.back();
2907 last
= this->output_bss_
.back();
2908 this->memsz_
= (last
->address()
2912 // If this is a TLS segment, align the memory size. The code in
2913 // set_section_list ensures that the section after the TLS segment
2914 // is aligned to give us room.
2915 if (this->type_
== elfcpp::PT_TLS
)
2917 uint64_t segment_align
= this->maximum_alignment();
2918 gold_assert(this->vaddr_
== align_address(this->vaddr_
, segment_align
));
2919 this->memsz_
= align_address(this->memsz_
, segment_align
);
2923 // Set the TLS offsets of the sections in the PT_TLS segment.
2926 Output_segment::set_tls_offsets()
2928 gold_assert(this->type_
== elfcpp::PT_TLS
);
2930 for (Output_data_list::iterator p
= this->output_data_
.begin();
2931 p
!= this->output_data_
.end();
2933 (*p
)->set_tls_offset(this->vaddr_
);
2935 for (Output_data_list::iterator p
= this->output_bss_
.begin();
2936 p
!= this->output_bss_
.end();
2938 (*p
)->set_tls_offset(this->vaddr_
);
2941 // Return the address of the first section.
2944 Output_segment::first_section_load_address() const
2946 for (Output_data_list::const_iterator p
= this->output_data_
.begin();
2947 p
!= this->output_data_
.end();
2949 if ((*p
)->is_section())
2950 return (*p
)->has_load_address() ? (*p
)->load_address() : (*p
)->address();
2952 for (Output_data_list::const_iterator p
= this->output_bss_
.begin();
2953 p
!= this->output_bss_
.end();
2955 if ((*p
)->is_section())
2956 return (*p
)->has_load_address() ? (*p
)->load_address() : (*p
)->address();
2961 // Return the number of Output_sections in an Output_segment.
2964 Output_segment::output_section_count() const
2966 return (this->output_section_count_list(&this->output_data_
)
2967 + this->output_section_count_list(&this->output_bss_
));
2970 // Return the number of Output_sections in an Output_data_list.
2973 Output_segment::output_section_count_list(const Output_data_list
* pdl
) const
2975 unsigned int count
= 0;
2976 for (Output_data_list::const_iterator p
= pdl
->begin();
2980 if ((*p
)->is_section())
2986 // Return the section attached to the list segment with the lowest
2987 // load address. This is used when handling a PHDRS clause in a
2991 Output_segment::section_with_lowest_load_address() const
2993 Output_section
* found
= NULL
;
2994 uint64_t found_lma
= 0;
2995 this->lowest_load_address_in_list(&this->output_data_
, &found
, &found_lma
);
2997 Output_section
* found_data
= found
;
2998 this->lowest_load_address_in_list(&this->output_bss_
, &found
, &found_lma
);
2999 if (found
!= found_data
&& found_data
!= NULL
)
3001 gold_error(_("nobits section %s may not precede progbits section %s "
3003 found
->name(), found_data
->name());
3010 // Look through a list for a section with a lower load address.
3013 Output_segment::lowest_load_address_in_list(const Output_data_list
* pdl
,
3014 Output_section
** found
,
3015 uint64_t* found_lma
) const
3017 for (Output_data_list::const_iterator p
= pdl
->begin();
3021 if (!(*p
)->is_section())
3023 Output_section
* os
= static_cast<Output_section
*>(*p
);
3024 uint64_t lma
= (os
->has_load_address()
3025 ? os
->load_address()
3027 if (*found
== NULL
|| lma
< *found_lma
)
3035 // Write the segment data into *OPHDR.
3037 template<int size
, bool big_endian
>
3039 Output_segment::write_header(elfcpp::Phdr_write
<size
, big_endian
>* ophdr
)
3041 ophdr
->put_p_type(this->type_
);
3042 ophdr
->put_p_offset(this->offset_
);
3043 ophdr
->put_p_vaddr(this->vaddr_
);
3044 ophdr
->put_p_paddr(this->paddr_
);
3045 ophdr
->put_p_filesz(this->filesz_
);
3046 ophdr
->put_p_memsz(this->memsz_
);
3047 ophdr
->put_p_flags(this->flags_
);
3048 ophdr
->put_p_align(std::max(this->min_p_align_
, this->maximum_alignment()));
3051 // Write the section headers into V.
3053 template<int size
, bool big_endian
>
3055 Output_segment::write_section_headers(const Layout
* layout
,
3056 const Stringpool
* secnamepool
,
3058 unsigned int *pshndx
) const
3060 // Every section that is attached to a segment must be attached to a
3061 // PT_LOAD segment, so we only write out section headers for PT_LOAD
3063 if (this->type_
!= elfcpp::PT_LOAD
)
3066 v
= this->write_section_headers_list
<size
, big_endian
>(layout
, secnamepool
,
3067 &this->output_data_
,
3069 v
= this->write_section_headers_list
<size
, big_endian
>(layout
, secnamepool
,
3075 template<int size
, bool big_endian
>
3077 Output_segment::write_section_headers_list(const Layout
* layout
,
3078 const Stringpool
* secnamepool
,
3079 const Output_data_list
* pdl
,
3081 unsigned int* pshndx
) const
3083 const int shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
3084 for (Output_data_list::const_iterator p
= pdl
->begin();
3088 if ((*p
)->is_section())
3090 const Output_section
* ps
= static_cast<const Output_section
*>(*p
);
3091 gold_assert(*pshndx
== ps
->out_shndx());
3092 elfcpp::Shdr_write
<size
, big_endian
> oshdr(v
);
3093 ps
->write_header(layout
, secnamepool
, &oshdr
);
3101 // Output_file methods.
3103 Output_file::Output_file(const char* name
)
3108 map_is_anonymous_(false),
3109 is_temporary_(false)
3113 // Open the output file.
3116 Output_file::open(off_t file_size
)
3118 this->file_size_
= file_size
;
3120 // Unlink the file first; otherwise the open() may fail if the file
3121 // is busy (e.g. it's an executable that's currently being executed).
3123 // However, the linker may be part of a system where a zero-length
3124 // file is created for it to write to, with tight permissions (gcc
3125 // 2.95 did something like this). Unlinking the file would work
3126 // around those permission controls, so we only unlink if the file
3127 // has a non-zero size. We also unlink only regular files to avoid
3128 // trouble with directories/etc.
3130 // If we fail, continue; this command is merely a best-effort attempt
3131 // to improve the odds for open().
3133 // We let the name "-" mean "stdout"
3134 if (!this->is_temporary_
)
3136 if (strcmp(this->name_
, "-") == 0)
3137 this->o_
= STDOUT_FILENO
;
3141 if (::stat(this->name_
, &s
) == 0 && s
.st_size
!= 0)
3142 unlink_if_ordinary(this->name_
);
3144 int mode
= parameters
->options().relocatable() ? 0666 : 0777;
3145 int o
= ::open(this->name_
, O_RDWR
| O_CREAT
| O_TRUNC
, mode
);
3147 gold_fatal(_("%s: open: %s"), this->name_
, strerror(errno
));
3155 // Resize the output file.
3158 Output_file::resize(off_t file_size
)
3160 // If the mmap is mapping an anonymous memory buffer, this is easy:
3161 // just mremap to the new size. If it's mapping to a file, we want
3162 // to unmap to flush to the file, then remap after growing the file.
3163 if (this->map_is_anonymous_
)
3165 void* base
= ::mremap(this->base_
, this->file_size_
, file_size
,
3167 if (base
== MAP_FAILED
)
3168 gold_fatal(_("%s: mremap: %s"), this->name_
, strerror(errno
));
3169 this->base_
= static_cast<unsigned char*>(base
);
3170 this->file_size_
= file_size
;
3175 this->file_size_
= file_size
;
3180 // Map the file into memory.
3185 const int o
= this->o_
;
3187 // If the output file is not a regular file, don't try to mmap it;
3188 // instead, we'll mmap a block of memory (an anonymous buffer), and
3189 // then later write the buffer to the file.
3191 struct stat statbuf
;
3192 if (o
== STDOUT_FILENO
|| o
== STDERR_FILENO
3193 || ::fstat(o
, &statbuf
) != 0
3194 || !S_ISREG(statbuf
.st_mode
)
3195 || this->is_temporary_
)
3197 this->map_is_anonymous_
= true;
3198 base
= ::mmap(NULL
, this->file_size_
, PROT_READ
| PROT_WRITE
,
3199 MAP_PRIVATE
| MAP_ANONYMOUS
, -1, 0);
3203 // Write out one byte to make the file the right size.
3204 if (::lseek(o
, this->file_size_
- 1, SEEK_SET
) < 0)
3205 gold_fatal(_("%s: lseek: %s"), this->name_
, strerror(errno
));
3207 if (::write(o
, &b
, 1) != 1)
3208 gold_fatal(_("%s: write: %s"), this->name_
, strerror(errno
));
3210 // Map the file into memory.
3211 this->map_is_anonymous_
= false;
3212 base
= ::mmap(NULL
, this->file_size_
, PROT_READ
| PROT_WRITE
,
3215 if (base
== MAP_FAILED
)
3216 gold_fatal(_("%s: mmap: %s"), this->name_
, strerror(errno
));
3217 this->base_
= static_cast<unsigned char*>(base
);
3220 // Unmap the file from memory.
3223 Output_file::unmap()
3225 if (::munmap(this->base_
, this->file_size_
) < 0)
3226 gold_error(_("%s: munmap: %s"), this->name_
, strerror(errno
));
3230 // Close the output file.
3233 Output_file::close()
3235 // If the map isn't file-backed, we need to write it now.
3236 if (this->map_is_anonymous_
&& !this->is_temporary_
)
3238 size_t bytes_to_write
= this->file_size_
;
3239 while (bytes_to_write
> 0)
3241 ssize_t bytes_written
= ::write(this->o_
, this->base_
, bytes_to_write
);
3242 if (bytes_written
== 0)
3243 gold_error(_("%s: write: unexpected 0 return-value"), this->name_
);
3244 else if (bytes_written
< 0)
3245 gold_error(_("%s: write: %s"), this->name_
, strerror(errno
));
3247 bytes_to_write
-= bytes_written
;
3252 // We don't close stdout or stderr
3253 if (this->o_
!= STDOUT_FILENO
3254 && this->o_
!= STDERR_FILENO
3255 && !this->is_temporary_
)
3256 if (::close(this->o_
) < 0)
3257 gold_error(_("%s: close: %s"), this->name_
, strerror(errno
));
3261 // Instantiate the templates we need. We could use the configure
3262 // script to restrict this to only the ones for implemented targets.
3264 #ifdef HAVE_TARGET_32_LITTLE
3267 Output_section::add_input_section
<32, false>(
3268 Sized_relobj
<32, false>* object
,
3270 const char* secname
,
3271 const elfcpp::Shdr
<32, false>& shdr
,
3272 unsigned int reloc_shndx
,
3273 bool have_sections_script
);
3276 #ifdef HAVE_TARGET_32_BIG
3279 Output_section::add_input_section
<32, true>(
3280 Sized_relobj
<32, true>* object
,
3282 const char* secname
,
3283 const elfcpp::Shdr
<32, true>& shdr
,
3284 unsigned int reloc_shndx
,
3285 bool have_sections_script
);
3288 #ifdef HAVE_TARGET_64_LITTLE
3291 Output_section::add_input_section
<64, false>(
3292 Sized_relobj
<64, false>* object
,
3294 const char* secname
,
3295 const elfcpp::Shdr
<64, false>& shdr
,
3296 unsigned int reloc_shndx
,
3297 bool have_sections_script
);
3300 #ifdef HAVE_TARGET_64_BIG
3303 Output_section::add_input_section
<64, true>(
3304 Sized_relobj
<64, true>* object
,
3306 const char* secname
,
3307 const elfcpp::Shdr
<64, true>& shdr
,
3308 unsigned int reloc_shndx
,
3309 bool have_sections_script
);
3312 #ifdef HAVE_TARGET_32_LITTLE
3314 class Output_data_reloc
<elfcpp::SHT_REL
, false, 32, false>;
3317 #ifdef HAVE_TARGET_32_BIG
3319 class Output_data_reloc
<elfcpp::SHT_REL
, false, 32, true>;
3322 #ifdef HAVE_TARGET_64_LITTLE
3324 class Output_data_reloc
<elfcpp::SHT_REL
, false, 64, false>;
3327 #ifdef HAVE_TARGET_64_BIG
3329 class Output_data_reloc
<elfcpp::SHT_REL
, false, 64, true>;
3332 #ifdef HAVE_TARGET_32_LITTLE
3334 class Output_data_reloc
<elfcpp::SHT_REL
, true, 32, false>;
3337 #ifdef HAVE_TARGET_32_BIG
3339 class Output_data_reloc
<elfcpp::SHT_REL
, true, 32, true>;
3342 #ifdef HAVE_TARGET_64_LITTLE
3344 class Output_data_reloc
<elfcpp::SHT_REL
, true, 64, false>;
3347 #ifdef HAVE_TARGET_64_BIG
3349 class Output_data_reloc
<elfcpp::SHT_REL
, true, 64, true>;
3352 #ifdef HAVE_TARGET_32_LITTLE
3354 class Output_data_reloc
<elfcpp::SHT_RELA
, false, 32, false>;
3357 #ifdef HAVE_TARGET_32_BIG
3359 class Output_data_reloc
<elfcpp::SHT_RELA
, false, 32, true>;
3362 #ifdef HAVE_TARGET_64_LITTLE
3364 class Output_data_reloc
<elfcpp::SHT_RELA
, false, 64, false>;
3367 #ifdef HAVE_TARGET_64_BIG
3369 class Output_data_reloc
<elfcpp::SHT_RELA
, false, 64, true>;
3372 #ifdef HAVE_TARGET_32_LITTLE
3374 class Output_data_reloc
<elfcpp::SHT_RELA
, true, 32, false>;
3377 #ifdef HAVE_TARGET_32_BIG
3379 class Output_data_reloc
<elfcpp::SHT_RELA
, true, 32, true>;
3382 #ifdef HAVE_TARGET_64_LITTLE
3384 class Output_data_reloc
<elfcpp::SHT_RELA
, true, 64, false>;
3387 #ifdef HAVE_TARGET_64_BIG
3389 class Output_data_reloc
<elfcpp::SHT_RELA
, true, 64, true>;
3392 #ifdef HAVE_TARGET_32_LITTLE
3394 class Output_relocatable_relocs
<elfcpp::SHT_REL
, 32, false>;
3397 #ifdef HAVE_TARGET_32_BIG
3399 class Output_relocatable_relocs
<elfcpp::SHT_REL
, 32, true>;
3402 #ifdef HAVE_TARGET_64_LITTLE
3404 class Output_relocatable_relocs
<elfcpp::SHT_REL
, 64, false>;
3407 #ifdef HAVE_TARGET_64_BIG
3409 class Output_relocatable_relocs
<elfcpp::SHT_REL
, 64, true>;
3412 #ifdef HAVE_TARGET_32_LITTLE
3414 class Output_relocatable_relocs
<elfcpp::SHT_RELA
, 32, false>;
3417 #ifdef HAVE_TARGET_32_BIG
3419 class Output_relocatable_relocs
<elfcpp::SHT_RELA
, 32, true>;
3422 #ifdef HAVE_TARGET_64_LITTLE
3424 class Output_relocatable_relocs
<elfcpp::SHT_RELA
, 64, false>;
3427 #ifdef HAVE_TARGET_64_BIG
3429 class Output_relocatable_relocs
<elfcpp::SHT_RELA
, 64, true>;
3432 #ifdef HAVE_TARGET_32_LITTLE
3434 class Output_data_group
<32, false>;
3437 #ifdef HAVE_TARGET_32_BIG
3439 class Output_data_group
<32, true>;
3442 #ifdef HAVE_TARGET_64_LITTLE
3444 class Output_data_group
<64, false>;
3447 #ifdef HAVE_TARGET_64_BIG
3449 class Output_data_group
<64, true>;
3452 #ifdef HAVE_TARGET_32_LITTLE
3454 class Output_data_got
<32, false>;
3457 #ifdef HAVE_TARGET_32_BIG
3459 class Output_data_got
<32, true>;
3462 #ifdef HAVE_TARGET_64_LITTLE
3464 class Output_data_got
<64, false>;
3467 #ifdef HAVE_TARGET_64_BIG
3469 class Output_data_got
<64, true>;
3472 } // End namespace gold.