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" // for unlink_if_ordinary()
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)
112 // Count all the sections. Start with 1 for the null section.
114 if (!parameters->options().relocatable())
116 for (Layout::Segment_list::const_iterator p = segment_list->begin();
117 p != segment_list->end();
119 if ((*p)->type() == elfcpp::PT_LOAD)
120 count += (*p)->output_section_count();
124 for (Layout::Section_list::const_iterator p = section_list->begin();
125 p != section_list->end();
127 if (((*p)->flags() & elfcpp::SHF_ALLOC) != 0)
130 count += unattached_section_list->size();
132 const int size = parameters->target().get_size();
135 shdr_size = elfcpp::Elf_sizes<32>::shdr_size;
137 shdr_size = elfcpp::Elf_sizes<64>::shdr_size;
141 this->set_data_size(count * shdr_size);
144 // Write out the section headers.
147 Output_section_headers::do_write(Output_file* of)
149 switch (parameters->size_and_endianness())
151 #ifdef HAVE_TARGET_32_LITTLE
152 case Parameters::TARGET_32_LITTLE:
153 this->do_sized_write<32, false>(of);
156 #ifdef HAVE_TARGET_32_BIG
157 case Parameters::TARGET_32_BIG:
158 this->do_sized_write<32, true>(of);
161 #ifdef HAVE_TARGET_64_LITTLE
162 case Parameters::TARGET_64_LITTLE:
163 this->do_sized_write<64, false>(of);
166 #ifdef HAVE_TARGET_64_BIG
167 case Parameters::TARGET_64_BIG:
168 this->do_sized_write<64, true>(of);
176 template<int size, bool big_endian>
178 Output_section_headers::do_sized_write(Output_file* of)
180 off_t all_shdrs_size = this->data_size();
181 unsigned char* view = of->get_output_view(this->offset(), all_shdrs_size);
183 const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size;
184 unsigned char* v = view;
187 typename elfcpp::Shdr_write<size, big_endian> oshdr(v);
188 oshdr.put_sh_name(0);
189 oshdr.put_sh_type(elfcpp::SHT_NULL);
190 oshdr.put_sh_flags(0);
191 oshdr.put_sh_addr(0);
192 oshdr.put_sh_offset(0);
194 size_t section_count = (this->data_size()
195 / elfcpp::Elf_sizes<size>::shdr_size);
196 if (section_count < elfcpp::SHN_LORESERVE)
197 oshdr.put_sh_size(0);
199 oshdr.put_sh_size(section_count);
201 unsigned int shstrndx = this->shstrtab_section_->out_shndx();
202 if (shstrndx < elfcpp::SHN_LORESERVE)
203 oshdr.put_sh_link(0);
205 oshdr.put_sh_link(shstrndx);
207 oshdr.put_sh_info(0);
208 oshdr.put_sh_addralign(0);
209 oshdr.put_sh_entsize(0);
214 unsigned int shndx = 1;
215 if (!parameters->options().relocatable())
217 for (Layout::Segment_list::const_iterator p =
218 this->segment_list_->begin();
219 p != this->segment_list_->end();
221 v = (*p)->write_section_headers<size, big_endian>(this->layout_,
228 for (Layout::Section_list::const_iterator p =
229 this->section_list_->begin();
230 p != this->section_list_->end();
233 // We do unallocated sections below, except that group
234 // sections have to come first.
235 if (((*p)->flags() & elfcpp::SHF_ALLOC) == 0
236 && (*p)->type() != elfcpp::SHT_GROUP)
238 gold_assert(shndx == (*p)->out_shndx());
239 elfcpp::Shdr_write<size, big_endian> oshdr(v);
240 (*p)->write_header(this->layout_, this->secnamepool_, &oshdr);
246 for (Layout::Section_list::const_iterator p =
247 this->unattached_section_list_->begin();
248 p != this->unattached_section_list_->end();
251 // For a relocatable link, we did unallocated group sections
252 // above, since they have to come first.
253 if ((*p)->type() == elfcpp::SHT_GROUP
254 && parameters->options().relocatable())
256 gold_assert(shndx == (*p)->out_shndx());
257 elfcpp::Shdr_write<size, big_endian> oshdr(v);
258 (*p)->write_header(this->layout_, this->secnamepool_, &oshdr);
263 of->write_output_view(this->offset(), all_shdrs_size, view);
266 // Output_segment_header methods.
268 Output_segment_headers::Output_segment_headers(
269 const Layout::Segment_list& segment_list)
270 : segment_list_(segment_list)
272 const int size = parameters->target().get_size();
275 phdr_size = elfcpp::Elf_sizes<32>::phdr_size;
277 phdr_size = elfcpp::Elf_sizes<64>::phdr_size;
281 this->set_data_size(segment_list.size() * phdr_size);
285 Output_segment_headers::do_write(Output_file* of)
287 switch (parameters->size_and_endianness())
289 #ifdef HAVE_TARGET_32_LITTLE
290 case Parameters::TARGET_32_LITTLE:
291 this->do_sized_write<32, false>(of);
294 #ifdef HAVE_TARGET_32_BIG
295 case Parameters::TARGET_32_BIG:
296 this->do_sized_write<32, true>(of);
299 #ifdef HAVE_TARGET_64_LITTLE
300 case Parameters::TARGET_64_LITTLE:
301 this->do_sized_write<64, false>(of);
304 #ifdef HAVE_TARGET_64_BIG
305 case Parameters::TARGET_64_BIG:
306 this->do_sized_write<64, true>(of);
314 template<int size, bool big_endian>
316 Output_segment_headers::do_sized_write(Output_file* of)
318 const int phdr_size = elfcpp::Elf_sizes<size>::phdr_size;
319 off_t all_phdrs_size = this->segment_list_.size() * phdr_size;
320 gold_assert(all_phdrs_size == this->data_size());
321 unsigned char* view = of->get_output_view(this->offset(),
323 unsigned char* v = view;
324 for (Layout::Segment_list::const_iterator p = this->segment_list_.begin();
325 p != this->segment_list_.end();
328 elfcpp::Phdr_write<size, big_endian> ophdr(v);
329 (*p)->write_header(&ophdr);
333 gold_assert(v - view == all_phdrs_size);
335 of->write_output_view(this->offset(), all_phdrs_size, view);
338 // Output_file_header methods.
340 Output_file_header::Output_file_header(const Target* target,
341 const Symbol_table* symtab,
342 const Output_segment_headers* osh,
346 segment_header_(osh),
347 section_header_(NULL),
351 const int size = parameters->target().get_size();
354 ehdr_size = elfcpp::Elf_sizes<32>::ehdr_size;
356 ehdr_size = elfcpp::Elf_sizes<64>::ehdr_size;
360 this->set_data_size(ehdr_size);
363 // Set the section table information for a file header.
366 Output_file_header::set_section_info(const Output_section_headers* shdrs,
367 const Output_section* shstrtab)
369 this->section_header_ = shdrs;
370 this->shstrtab_ = shstrtab;
373 // Write out the file header.
376 Output_file_header::do_write(Output_file* of)
378 gold_assert(this->offset() == 0);
380 switch (parameters->size_and_endianness())
382 #ifdef HAVE_TARGET_32_LITTLE
383 case Parameters::TARGET_32_LITTLE:
384 this->do_sized_write<32, false>(of);
387 #ifdef HAVE_TARGET_32_BIG
388 case Parameters::TARGET_32_BIG:
389 this->do_sized_write<32, true>(of);
392 #ifdef HAVE_TARGET_64_LITTLE
393 case Parameters::TARGET_64_LITTLE:
394 this->do_sized_write<64, false>(of);
397 #ifdef HAVE_TARGET_64_BIG
398 case Parameters::TARGET_64_BIG:
399 this->do_sized_write<64, true>(of);
407 // Write out the file header with appropriate size and endianess.
409 template<int size, bool big_endian>
411 Output_file_header::do_sized_write(Output_file* of)
413 gold_assert(this->offset() == 0);
415 int ehdr_size = elfcpp::Elf_sizes<size>::ehdr_size;
416 unsigned char* view = of->get_output_view(0, ehdr_size);
417 elfcpp::Ehdr_write<size, big_endian> oehdr(view);
419 unsigned char e_ident[elfcpp::EI_NIDENT];
420 memset(e_ident, 0, elfcpp::EI_NIDENT);
421 e_ident[elfcpp::EI_MAG0] = elfcpp::ELFMAG0;
422 e_ident[elfcpp::EI_MAG1] = elfcpp::ELFMAG1;
423 e_ident[elfcpp::EI_MAG2] = elfcpp::ELFMAG2;
424 e_ident[elfcpp::EI_MAG3] = elfcpp::ELFMAG3;
426 e_ident[elfcpp::EI_CLASS] = elfcpp::ELFCLASS32;
428 e_ident[elfcpp::EI_CLASS] = elfcpp::ELFCLASS64;
431 e_ident[elfcpp::EI_DATA] = (big_endian
432 ? elfcpp::ELFDATA2MSB
433 : elfcpp::ELFDATA2LSB);
434 e_ident[elfcpp::EI_VERSION] = elfcpp::EV_CURRENT;
435 // FIXME: Some targets may need to set EI_OSABI and EI_ABIVERSION.
436 oehdr.put_e_ident(e_ident);
439 if (parameters->options().relocatable())
440 e_type = elfcpp::ET_REL;
441 else if (parameters->options().shared())
442 e_type = elfcpp::ET_DYN;
444 e_type = elfcpp::ET_EXEC;
445 oehdr.put_e_type(e_type);
447 oehdr.put_e_machine(this->target_->machine_code());
448 oehdr.put_e_version(elfcpp::EV_CURRENT);
450 oehdr.put_e_entry(this->entry<size>());
452 if (this->segment_header_ == NULL)
453 oehdr.put_e_phoff(0);
455 oehdr.put_e_phoff(this->segment_header_->offset());
457 oehdr.put_e_shoff(this->section_header_->offset());
459 // FIXME: The target needs to set the flags.
460 oehdr.put_e_flags(0);
462 oehdr.put_e_ehsize(elfcpp::Elf_sizes<size>::ehdr_size);
464 if (this->segment_header_ == NULL)
466 oehdr.put_e_phentsize(0);
467 oehdr.put_e_phnum(0);
471 oehdr.put_e_phentsize(elfcpp::Elf_sizes<size>::phdr_size);
472 oehdr.put_e_phnum(this->segment_header_->data_size()
473 / elfcpp::Elf_sizes<size>::phdr_size);
476 oehdr.put_e_shentsize(elfcpp::Elf_sizes<size>::shdr_size);
477 size_t section_count = (this->section_header_->data_size()
478 / elfcpp::Elf_sizes<size>::shdr_size);
480 if (section_count < elfcpp::SHN_LORESERVE)
481 oehdr.put_e_shnum(this->section_header_->data_size()
482 / elfcpp::Elf_sizes<size>::shdr_size);
484 oehdr.put_e_shnum(0);
486 unsigned int shstrndx = this->shstrtab_->out_shndx();
487 if (shstrndx < elfcpp::SHN_LORESERVE)
488 oehdr.put_e_shstrndx(this->shstrtab_->out_shndx());
490 oehdr.put_e_shstrndx(elfcpp::SHN_XINDEX);
492 of->write_output_view(0, ehdr_size, view);
495 // Return the value to use for the entry address. THIS->ENTRY_ is the
496 // symbol specified on the command line, if any.
499 typename elfcpp::Elf_types<size>::Elf_Addr
500 Output_file_header::entry()
502 const bool should_issue_warning = (this->entry_ != NULL
503 && !parameters->options().relocatable()
504 && !parameters->options().shared());
506 // FIXME: Need to support target specific entry symbol.
507 const char* entry = this->entry_;
511 Symbol* sym = this->symtab_->lookup(entry);
513 typename Sized_symbol<size>::Value_type v;
516 Sized_symbol<size>* ssym;
517 ssym = this->symtab_->get_sized_symbol<size>(sym);
518 if (!ssym->is_defined() && should_issue_warning)
519 gold_warning("entry symbol '%s' exists but is not defined", entry);
524 // We couldn't find the entry symbol. See if we can parse it as
525 // a number. This supports, e.g., -e 0x1000.
527 v = strtoull(entry, &endptr, 0);
530 if (should_issue_warning)
531 gold_warning("cannot find entry symbol '%s'", entry);
539 // Output_data_const methods.
542 Output_data_const::do_write(Output_file* of)
544 of->write(this->offset(), this->data_.data(), this->data_.size());
547 // Output_data_const_buffer methods.
550 Output_data_const_buffer::do_write(Output_file* of)
552 of->write(this->offset(), this->p_, this->data_size());
555 // Output_section_data methods.
557 // Record the output section, and set the entry size and such.
560 Output_section_data::set_output_section(Output_section* os)
562 gold_assert(this->output_section_ == NULL);
563 this->output_section_ = os;
564 this->do_adjust_output_section(os);
567 // Return the section index of the output section.
570 Output_section_data::do_out_shndx() const
572 gold_assert(this->output_section_ != NULL);
573 return this->output_section_->out_shndx();
576 // Set the alignment, which means we may need to update the alignment
577 // of the output section.
580 Output_section_data::set_addralign(uint64_t addralign)
582 this->addralign_ = addralign;
583 if (this->output_section_ != NULL
584 && this->output_section_->addralign() < addralign)
585 this->output_section_->set_addralign(addralign);
588 // Output_data_strtab methods.
590 // Set the final data size.
593 Output_data_strtab::set_final_data_size()
595 this->strtab_->set_string_offsets();
596 this->set_data_size(this->strtab_->get_strtab_size());
599 // Write out a string table.
602 Output_data_strtab::do_write(Output_file* of)
604 this->strtab_->write(of, this->offset());
607 // Output_reloc methods.
609 // A reloc against a global symbol.
611 template<bool dynamic, int size, bool big_endian>
612 Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::Output_reloc(
618 : address_(address), local_sym_index_(GSYM_CODE), type_(type),
619 is_relative_(is_relative), is_section_symbol_(false), shndx_(INVALID_CODE)
621 // this->type_ is a bitfield; make sure TYPE fits.
622 gold_assert(this->type_ == type);
623 this->u1_.gsym = gsym;
626 this->set_needs_dynsym_index();
629 template<bool dynamic, int size, bool big_endian>
630 Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::Output_reloc(
633 Sized_relobj<size, big_endian>* relobj,
637 : address_(address), local_sym_index_(GSYM_CODE), type_(type),
638 is_relative_(is_relative), is_section_symbol_(false), shndx_(shndx)
640 gold_assert(shndx != INVALID_CODE);
641 // this->type_ is a bitfield; make sure TYPE fits.
642 gold_assert(this->type_ == type);
643 this->u1_.gsym = gsym;
644 this->u2_.relobj = relobj;
646 this->set_needs_dynsym_index();
649 // A reloc against a local symbol.
651 template<bool dynamic, int size, bool big_endian>
652 Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::Output_reloc(
653 Sized_relobj<size, big_endian>* relobj,
654 unsigned int local_sym_index,
659 bool is_section_symbol)
660 : address_(address), local_sym_index_(local_sym_index), type_(type),
661 is_relative_(is_relative), is_section_symbol_(is_section_symbol),
664 gold_assert(local_sym_index != GSYM_CODE
665 && local_sym_index != INVALID_CODE);
666 // this->type_ is a bitfield; make sure TYPE fits.
667 gold_assert(this->type_ == type);
668 this->u1_.relobj = relobj;
671 this->set_needs_dynsym_index();
674 template<bool dynamic, int size, bool big_endian>
675 Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::Output_reloc(
676 Sized_relobj<size, big_endian>* relobj,
677 unsigned int local_sym_index,
682 bool is_section_symbol)
683 : address_(address), local_sym_index_(local_sym_index), type_(type),
684 is_relative_(is_relative), is_section_symbol_(is_section_symbol),
687 gold_assert(local_sym_index != GSYM_CODE
688 && local_sym_index != INVALID_CODE);
689 gold_assert(shndx != INVALID_CODE);
690 // this->type_ is a bitfield; make sure TYPE fits.
691 gold_assert(this->type_ == type);
692 this->u1_.relobj = relobj;
693 this->u2_.relobj = relobj;
695 this->set_needs_dynsym_index();
698 // A reloc against the STT_SECTION symbol of an output section.
700 template<bool dynamic, int size, bool big_endian>
701 Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::Output_reloc(
706 : address_(address), local_sym_index_(SECTION_CODE), type_(type),
707 is_relative_(false), is_section_symbol_(true), shndx_(INVALID_CODE)
709 // this->type_ is a bitfield; make sure TYPE fits.
710 gold_assert(this->type_ == type);
714 this->set_needs_dynsym_index();
716 os->set_needs_symtab_index();
719 template<bool dynamic, int size, bool big_endian>
720 Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::Output_reloc(
723 Sized_relobj<size, big_endian>* relobj,
726 : address_(address), local_sym_index_(SECTION_CODE), type_(type),
727 is_relative_(false), is_section_symbol_(true), shndx_(shndx)
729 gold_assert(shndx != INVALID_CODE);
730 // this->type_ is a bitfield; make sure TYPE fits.
731 gold_assert(this->type_ == type);
733 this->u2_.relobj = relobj;
735 this->set_needs_dynsym_index();
737 os->set_needs_symtab_index();
740 // Record that we need a dynamic symbol index for this relocation.
742 template<bool dynamic, int size, bool big_endian>
744 Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::
745 set_needs_dynsym_index()
747 if (this->is_relative_)
749 switch (this->local_sym_index_)
755 this->u1_.gsym->set_needs_dynsym_entry();
759 this->u1_.os->set_needs_dynsym_index();
767 const unsigned int lsi = this->local_sym_index_;
768 if (!this->is_section_symbol_)
769 this->u1_.relobj->set_needs_output_dynsym_entry(lsi);
771 this->u1_.relobj->output_section(lsi)->set_needs_dynsym_index();
777 // Get the symbol index of a relocation.
779 template<bool dynamic, int size, bool big_endian>
781 Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::get_symbol_index()
785 switch (this->local_sym_index_)
791 if (this->u1_.gsym == NULL)
794 index = this->u1_.gsym->dynsym_index();
796 index = this->u1_.gsym->symtab_index();
801 index = this->u1_.os->dynsym_index();
803 index = this->u1_.os->symtab_index();
807 // Relocations without symbols use a symbol index of 0.
813 const unsigned int lsi = this->local_sym_index_;
814 if (!this->is_section_symbol_)
817 index = this->u1_.relobj->dynsym_index(lsi);
819 index = this->u1_.relobj->symtab_index(lsi);
823 Output_section* os = this->u1_.relobj->output_section(lsi);
824 gold_assert(os != NULL);
826 index = os->dynsym_index();
828 index = os->symtab_index();
833 gold_assert(index != -1U);
837 // For a local section symbol, get the address of the offset ADDEND
838 // within the input section.
840 template<bool dynamic, int size, bool big_endian>
841 typename elfcpp::Elf_types<size>::Elf_Addr
842 Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::
843 local_section_offset(Addend addend) const
845 gold_assert(this->local_sym_index_ != GSYM_CODE
846 && this->local_sym_index_ != SECTION_CODE
847 && this->local_sym_index_ != INVALID_CODE
848 && this->is_section_symbol_);
849 const unsigned int lsi = this->local_sym_index_;
850 Output_section* os = this->u1_.relobj->output_section(lsi);
851 gold_assert(os != NULL);
852 Address offset = this->u1_.relobj->get_output_section_offset(lsi);
853 if (offset != invalid_address)
854 return offset + addend;
855 // This is a merge section.
856 offset = os->output_address(this->u1_.relobj, lsi, addend);
857 gold_assert(offset != invalid_address);
861 // Get the output address of a relocation.
863 template<bool dynamic, int size, bool big_endian>
864 typename elfcpp::Elf_types<size>::Elf_Addr
865 Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::get_address() const
867 Address address = this->address_;
868 if (this->shndx_ != INVALID_CODE)
870 Output_section* os = this->u2_.relobj->output_section(this->shndx_);
871 gold_assert(os != NULL);
872 Address off = this->u2_.relobj->get_output_section_offset(this->shndx_);
873 if (off != invalid_address)
874 address += os->address() + off;
877 address = os->output_address(this->u2_.relobj, this->shndx_,
879 gold_assert(address != invalid_address);
882 else if (this->u2_.od != NULL)
883 address += this->u2_.od->address();
887 // Write out the offset and info fields of a Rel or Rela relocation
890 template<bool dynamic, int size, bool big_endian>
891 template<typename Write_rel>
893 Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::write_rel(
896 wr->put_r_offset(this->get_address());
897 unsigned int sym_index = this->is_relative_ ? 0 : this->get_symbol_index();
898 wr->put_r_info(elfcpp::elf_r_info<size>(sym_index, this->type_));
901 // Write out a Rel relocation.
903 template<bool dynamic, int size, bool big_endian>
905 Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::write(
906 unsigned char* pov) const
908 elfcpp::Rel_write<size, big_endian> orel(pov);
909 this->write_rel(&orel);
912 // Get the value of the symbol referred to by a Rel relocation.
914 template<bool dynamic, int size, bool big_endian>
915 typename elfcpp::Elf_types<size>::Elf_Addr
916 Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::symbol_value(
919 if (this->local_sym_index_ == GSYM_CODE)
921 const Sized_symbol<size>* sym;
922 sym = static_cast<const Sized_symbol<size>*>(this->u1_.gsym);
923 return sym->value() + addend;
925 gold_assert(this->local_sym_index_ != SECTION_CODE
926 && this->local_sym_index_ != INVALID_CODE
927 && !this->is_section_symbol_);
928 const unsigned int lsi = this->local_sym_index_;
929 const Symbol_value<size>* symval = this->u1_.relobj->local_symbol(lsi);
930 return symval->value(this->u1_.relobj, addend);
933 // Reloc comparison. This function sorts the dynamic relocs for the
934 // benefit of the dynamic linker. First we sort all relative relocs
935 // to the front. Among relative relocs, we sort by output address.
936 // Among non-relative relocs, we sort by symbol index, then by output
939 template<bool dynamic, int size, bool big_endian>
941 Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::
942 compare(const Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>& r2)
945 if (this->is_relative_)
947 if (!r2.is_relative_)
949 // Otherwise sort by reloc address below.
951 else if (r2.is_relative_)
955 unsigned int sym1 = this->get_symbol_index();
956 unsigned int sym2 = r2.get_symbol_index();
959 else if (sym1 > sym2)
961 // Otherwise sort by reloc address.
964 section_offset_type addr1 = this->get_address();
965 section_offset_type addr2 = r2.get_address();
968 else if (addr1 > addr2)
971 // Final tie breaker, in order to generate the same output on any
973 unsigned int type1 = this->type_;
974 unsigned int type2 = r2.type_;
977 else if (type1 > type2)
980 // These relocs appear to be exactly the same.
984 // Write out a Rela relocation.
986 template<bool dynamic, int size, bool big_endian>
988 Output_reloc<elfcpp::SHT_RELA, dynamic, size, big_endian>::write(
989 unsigned char* pov) const
991 elfcpp::Rela_write<size, big_endian> orel(pov);
992 this->rel_.write_rel(&orel);
993 Addend addend = this->addend_;
994 if (this->rel_.is_relative())
995 addend = this->rel_.symbol_value(addend);
996 else if (this->rel_.is_local_section_symbol())
997 addend = this->rel_.local_section_offset(addend);
998 orel.put_r_addend(addend);
1001 // Output_data_reloc_base methods.
1003 // Adjust the output section.
1005 template<int sh_type, bool dynamic, int size, bool big_endian>
1007 Output_data_reloc_base<sh_type, dynamic, size, big_endian>
1008 ::do_adjust_output_section(Output_section* os)
1010 if (sh_type == elfcpp::SHT_REL)
1011 os->set_entsize(elfcpp::Elf_sizes<size>::rel_size);
1012 else if (sh_type == elfcpp::SHT_RELA)
1013 os->set_entsize(elfcpp::Elf_sizes<size>::rela_size);
1017 os->set_should_link_to_dynsym();
1019 os->set_should_link_to_symtab();
1022 // Write out relocation data.
1024 template<int sh_type, bool dynamic, int size, bool big_endian>
1026 Output_data_reloc_base<sh_type, dynamic, size, big_endian>::do_write(
1029 const off_t off = this->offset();
1030 const off_t oview_size = this->data_size();
1031 unsigned char* const oview = of->get_output_view(off, oview_size);
1033 if (this->sort_relocs_)
1035 gold_assert(dynamic);
1036 std::sort(this->relocs_.begin(), this->relocs_.end(),
1037 Sort_relocs_comparison());
1040 unsigned char* pov = oview;
1041 for (typename Relocs::const_iterator p = this->relocs_.begin();
1042 p != this->relocs_.end();
1049 gold_assert(pov - oview == oview_size);
1051 of->write_output_view(off, oview_size, oview);
1053 // We no longer need the relocation entries.
1054 this->relocs_.clear();
1057 // Class Output_relocatable_relocs.
1059 template<int sh_type, int size, bool big_endian>
1061 Output_relocatable_relocs<sh_type, size, big_endian>::set_final_data_size()
1063 this->set_data_size(this->rr_->output_reloc_count()
1064 * Reloc_types<sh_type, size, big_endian>::reloc_size);
1067 // class Output_data_group.
1069 template<int size, bool big_endian>
1070 Output_data_group<size, big_endian>::Output_data_group(
1071 Sized_relobj<size, big_endian>* relobj,
1072 section_size_type entry_count,
1073 elfcpp::Elf_Word flags,
1074 std::vector<unsigned int>* input_shndxes)
1075 : Output_section_data(entry_count * 4, 4),
1079 this->input_shndxes_.swap(*input_shndxes);
1082 // Write out the section group, which means translating the section
1083 // indexes to apply to the output file.
1085 template<int size, bool big_endian>
1087 Output_data_group<size, big_endian>::do_write(Output_file* of)
1089 const off_t off = this->offset();
1090 const section_size_type oview_size =
1091 convert_to_section_size_type(this->data_size());
1092 unsigned char* const oview = of->get_output_view(off, oview_size);
1094 elfcpp::Elf_Word* contents = reinterpret_cast<elfcpp::Elf_Word*>(oview);
1095 elfcpp::Swap<32, big_endian>::writeval(contents, this->flags_);
1098 for (std::vector<unsigned int>::const_iterator p =
1099 this->input_shndxes_.begin();
1100 p != this->input_shndxes_.end();
1103 Output_section* os = this->relobj_->output_section(*p);
1105 unsigned int output_shndx;
1107 output_shndx = os->out_shndx();
1110 this->relobj_->error(_("section group retained but "
1111 "group element discarded"));
1115 elfcpp::Swap<32, big_endian>::writeval(contents, output_shndx);
1118 size_t wrote = reinterpret_cast<unsigned char*>(contents) - oview;
1119 gold_assert(wrote == oview_size);
1121 of->write_output_view(off, oview_size, oview);
1123 // We no longer need this information.
1124 this->input_shndxes_.clear();
1127 // Output_data_got::Got_entry methods.
1129 // Write out the entry.
1131 template<int size, bool big_endian>
1133 Output_data_got<size, big_endian>::Got_entry::write(unsigned char* pov) const
1137 switch (this->local_sym_index_)
1141 // If the symbol is resolved locally, we need to write out the
1142 // link-time value, which will be relocated dynamically by a
1143 // RELATIVE relocation.
1144 Symbol* gsym = this->u_.gsym;
1145 Sized_symbol<size>* sgsym;
1146 // This cast is a bit ugly. We don't want to put a
1147 // virtual method in Symbol, because we want Symbol to be
1148 // as small as possible.
1149 sgsym = static_cast<Sized_symbol<size>*>(gsym);
1150 val = sgsym->value();
1155 val = this->u_.constant;
1160 const unsigned int lsi = this->local_sym_index_;
1161 const Symbol_value<size>* symval = this->u_.object->local_symbol(lsi);
1162 val = symval->value(this->u_.object, 0);
1167 elfcpp::Swap<size, big_endian>::writeval(pov, val);
1170 // Output_data_got methods.
1172 // Add an entry for a global symbol to the GOT. This returns true if
1173 // this is a new GOT entry, false if the symbol already had a GOT
1176 template<int size, bool big_endian>
1178 Output_data_got<size, big_endian>::add_global(
1180 unsigned int got_type)
1182 if (gsym->has_got_offset(got_type))
1185 this->entries_.push_back(Got_entry(gsym));
1186 this->set_got_size();
1187 gsym->set_got_offset(got_type, this->last_got_offset());
1191 // Add an entry for a global symbol to the GOT, and add a dynamic
1192 // relocation of type R_TYPE for the GOT entry.
1193 template<int size, bool big_endian>
1195 Output_data_got<size, big_endian>::add_global_with_rel(
1197 unsigned int got_type,
1199 unsigned int r_type)
1201 if (gsym->has_got_offset(got_type))
1204 this->entries_.push_back(Got_entry());
1205 this->set_got_size();
1206 unsigned int got_offset = this->last_got_offset();
1207 gsym->set_got_offset(got_type, got_offset);
1208 rel_dyn->add_global(gsym, r_type, this, got_offset);
1211 template<int size, bool big_endian>
1213 Output_data_got<size, big_endian>::add_global_with_rela(
1215 unsigned int got_type,
1217 unsigned int r_type)
1219 if (gsym->has_got_offset(got_type))
1222 this->entries_.push_back(Got_entry());
1223 this->set_got_size();
1224 unsigned int got_offset = this->last_got_offset();
1225 gsym->set_got_offset(got_type, got_offset);
1226 rela_dyn->add_global(gsym, r_type, this, got_offset, 0);
1229 // Add a pair of entries for a global symbol to the GOT, and add
1230 // dynamic relocations of type R_TYPE_1 and R_TYPE_2, respectively.
1231 // If R_TYPE_2 == 0, add the second entry with no relocation.
1232 template<int size, bool big_endian>
1234 Output_data_got<size, big_endian>::add_global_pair_with_rel(
1236 unsigned int got_type,
1238 unsigned int r_type_1,
1239 unsigned int r_type_2)
1241 if (gsym->has_got_offset(got_type))
1244 this->entries_.push_back(Got_entry());
1245 unsigned int got_offset = this->last_got_offset();
1246 gsym->set_got_offset(got_type, got_offset);
1247 rel_dyn->add_global(gsym, r_type_1, this, got_offset);
1249 this->entries_.push_back(Got_entry());
1252 got_offset = this->last_got_offset();
1253 rel_dyn->add_global(gsym, r_type_2, this, got_offset);
1256 this->set_got_size();
1259 template<int size, bool big_endian>
1261 Output_data_got<size, big_endian>::add_global_pair_with_rela(
1263 unsigned int got_type,
1265 unsigned int r_type_1,
1266 unsigned int r_type_2)
1268 if (gsym->has_got_offset(got_type))
1271 this->entries_.push_back(Got_entry());
1272 unsigned int got_offset = this->last_got_offset();
1273 gsym->set_got_offset(got_type, got_offset);
1274 rela_dyn->add_global(gsym, r_type_1, this, got_offset, 0);
1276 this->entries_.push_back(Got_entry());
1279 got_offset = this->last_got_offset();
1280 rela_dyn->add_global(gsym, r_type_2, this, got_offset, 0);
1283 this->set_got_size();
1286 // Add an entry for a local symbol to the GOT. This returns true if
1287 // this is a new GOT entry, false if the symbol already has a GOT
1290 template<int size, bool big_endian>
1292 Output_data_got<size, big_endian>::add_local(
1293 Sized_relobj<size, big_endian>* object,
1294 unsigned int symndx,
1295 unsigned int got_type)
1297 if (object->local_has_got_offset(symndx, got_type))
1300 this->entries_.push_back(Got_entry(object, symndx));
1301 this->set_got_size();
1302 object->set_local_got_offset(symndx, got_type, this->last_got_offset());
1306 // Add an entry for a local symbol to the GOT, and add a dynamic
1307 // relocation of type R_TYPE for the GOT entry.
1308 template<int size, bool big_endian>
1310 Output_data_got<size, big_endian>::add_local_with_rel(
1311 Sized_relobj<size, big_endian>* object,
1312 unsigned int symndx,
1313 unsigned int got_type,
1315 unsigned int r_type)
1317 if (object->local_has_got_offset(symndx, got_type))
1320 this->entries_.push_back(Got_entry());
1321 this->set_got_size();
1322 unsigned int got_offset = this->last_got_offset();
1323 object->set_local_got_offset(symndx, got_type, got_offset);
1324 rel_dyn->add_local(object, symndx, r_type, this, got_offset);
1327 template<int size, bool big_endian>
1329 Output_data_got<size, big_endian>::add_local_with_rela(
1330 Sized_relobj<size, big_endian>* object,
1331 unsigned int symndx,
1332 unsigned int got_type,
1334 unsigned int r_type)
1336 if (object->local_has_got_offset(symndx, got_type))
1339 this->entries_.push_back(Got_entry());
1340 this->set_got_size();
1341 unsigned int got_offset = this->last_got_offset();
1342 object->set_local_got_offset(symndx, got_type, got_offset);
1343 rela_dyn->add_local(object, symndx, r_type, this, got_offset, 0);
1346 // Add a pair of entries for a local symbol to the GOT, and add
1347 // dynamic relocations of type R_TYPE_1 and R_TYPE_2, respectively.
1348 // If R_TYPE_2 == 0, add the second entry with no relocation.
1349 template<int size, bool big_endian>
1351 Output_data_got<size, big_endian>::add_local_pair_with_rel(
1352 Sized_relobj<size, big_endian>* object,
1353 unsigned int symndx,
1355 unsigned int got_type,
1357 unsigned int r_type_1,
1358 unsigned int r_type_2)
1360 if (object->local_has_got_offset(symndx, got_type))
1363 this->entries_.push_back(Got_entry());
1364 unsigned int got_offset = this->last_got_offset();
1365 object->set_local_got_offset(symndx, got_type, got_offset);
1366 Output_section* os = object->output_section(shndx);
1367 rel_dyn->add_output_section(os, r_type_1, this, got_offset);
1369 this->entries_.push_back(Got_entry(object, symndx));
1372 got_offset = this->last_got_offset();
1373 rel_dyn->add_output_section(os, r_type_2, this, got_offset);
1376 this->set_got_size();
1379 template<int size, bool big_endian>
1381 Output_data_got<size, big_endian>::add_local_pair_with_rela(
1382 Sized_relobj<size, big_endian>* object,
1383 unsigned int symndx,
1385 unsigned int got_type,
1387 unsigned int r_type_1,
1388 unsigned int r_type_2)
1390 if (object->local_has_got_offset(symndx, got_type))
1393 this->entries_.push_back(Got_entry());
1394 unsigned int got_offset = this->last_got_offset();
1395 object->set_local_got_offset(symndx, got_type, got_offset);
1396 Output_section* os = object->output_section(shndx);
1397 rela_dyn->add_output_section(os, r_type_1, this, got_offset, 0);
1399 this->entries_.push_back(Got_entry(object, symndx));
1402 got_offset = this->last_got_offset();
1403 rela_dyn->add_output_section(os, r_type_2, this, got_offset, 0);
1406 this->set_got_size();
1409 // Write out the GOT.
1411 template<int size, bool big_endian>
1413 Output_data_got<size, big_endian>::do_write(Output_file* of)
1415 const int add = size / 8;
1417 const off_t off = this->offset();
1418 const off_t oview_size = this->data_size();
1419 unsigned char* const oview = of->get_output_view(off, oview_size);
1421 unsigned char* pov = oview;
1422 for (typename Got_entries::const_iterator p = this->entries_.begin();
1423 p != this->entries_.end();
1430 gold_assert(pov - oview == oview_size);
1432 of->write_output_view(off, oview_size, oview);
1434 // We no longer need the GOT entries.
1435 this->entries_.clear();
1438 // Output_data_dynamic::Dynamic_entry methods.
1440 // Write out the entry.
1442 template<int size, bool big_endian>
1444 Output_data_dynamic::Dynamic_entry::write(
1446 const Stringpool* pool) const
1448 typename elfcpp::Elf_types<size>::Elf_WXword val;
1449 switch (this->offset_)
1451 case DYNAMIC_NUMBER:
1455 case DYNAMIC_SECTION_SIZE:
1456 val = this->u_.od->data_size();
1459 case DYNAMIC_SYMBOL:
1461 const Sized_symbol<size>* s =
1462 static_cast<const Sized_symbol<size>*>(this->u_.sym);
1467 case DYNAMIC_STRING:
1468 val = pool->get_offset(this->u_.str);
1472 val = this->u_.od->address() + this->offset_;
1476 elfcpp::Dyn_write<size, big_endian> dw(pov);
1477 dw.put_d_tag(this->tag_);
1481 // Output_data_dynamic methods.
1483 // Adjust the output section to set the entry size.
1486 Output_data_dynamic::do_adjust_output_section(Output_section* os)
1488 if (parameters->target().get_size() == 32)
1489 os->set_entsize(elfcpp::Elf_sizes<32>::dyn_size);
1490 else if (parameters->target().get_size() == 64)
1491 os->set_entsize(elfcpp::Elf_sizes<64>::dyn_size);
1496 // Set the final data size.
1499 Output_data_dynamic::set_final_data_size()
1501 // Add the terminating entry.
1502 this->add_constant(elfcpp::DT_NULL, 0);
1505 if (parameters->target().get_size() == 32)
1506 dyn_size = elfcpp::Elf_sizes<32>::dyn_size;
1507 else if (parameters->target().get_size() == 64)
1508 dyn_size = elfcpp::Elf_sizes<64>::dyn_size;
1511 this->set_data_size(this->entries_.size() * dyn_size);
1514 // Write out the dynamic entries.
1517 Output_data_dynamic::do_write(Output_file* of)
1519 switch (parameters->size_and_endianness())
1521 #ifdef HAVE_TARGET_32_LITTLE
1522 case Parameters::TARGET_32_LITTLE:
1523 this->sized_write<32, false>(of);
1526 #ifdef HAVE_TARGET_32_BIG
1527 case Parameters::TARGET_32_BIG:
1528 this->sized_write<32, true>(of);
1531 #ifdef HAVE_TARGET_64_LITTLE
1532 case Parameters::TARGET_64_LITTLE:
1533 this->sized_write<64, false>(of);
1536 #ifdef HAVE_TARGET_64_BIG
1537 case Parameters::TARGET_64_BIG:
1538 this->sized_write<64, true>(of);
1546 template<int size, bool big_endian>
1548 Output_data_dynamic::sized_write(Output_file* of)
1550 const int dyn_size = elfcpp::Elf_sizes<size>::dyn_size;
1552 const off_t offset = this->offset();
1553 const off_t oview_size = this->data_size();
1554 unsigned char* const oview = of->get_output_view(offset, oview_size);
1556 unsigned char* pov = oview;
1557 for (typename Dynamic_entries::const_iterator p = this->entries_.begin();
1558 p != this->entries_.end();
1561 p->write<size, big_endian>(pov, this->pool_);
1565 gold_assert(pov - oview == oview_size);
1567 of->write_output_view(offset, oview_size, oview);
1569 // We no longer need the dynamic entries.
1570 this->entries_.clear();
1573 // Class Output_symtab_xindex.
1576 Output_symtab_xindex::do_write(Output_file* of)
1578 const off_t offset = this->offset();
1579 const off_t oview_size = this->data_size();
1580 unsigned char* const oview = of->get_output_view(offset, oview_size);
1582 memset(oview, 0, oview_size);
1584 if (parameters->target().is_big_endian())
1585 this->endian_do_write<true>(oview);
1587 this->endian_do_write<false>(oview);
1589 of->write_output_view(offset, oview_size, oview);
1591 // We no longer need the data.
1592 this->entries_.clear();
1595 template<bool big_endian>
1597 Output_symtab_xindex::endian_do_write(unsigned char* const oview)
1599 for (Xindex_entries::const_iterator p = this->entries_.begin();
1600 p != this->entries_.end();
1602 elfcpp::Swap<32, big_endian>::writeval(oview + p->first * 4, p->second);
1605 // Output_section::Input_section methods.
1607 // Return the data size. For an input section we store the size here.
1608 // For an Output_section_data, we have to ask it for the size.
1611 Output_section::Input_section::data_size() const
1613 if (this->is_input_section())
1614 return this->u1_.data_size;
1616 return this->u2_.posd->data_size();
1619 // Set the address and file offset.
1622 Output_section::Input_section::set_address_and_file_offset(
1625 off_t section_file_offset)
1627 if (this->is_input_section())
1628 this->u2_.object->set_section_offset(this->shndx_,
1629 file_offset - section_file_offset);
1631 this->u2_.posd->set_address_and_file_offset(address, file_offset);
1634 // Reset the address and file offset.
1637 Output_section::Input_section::reset_address_and_file_offset()
1639 if (!this->is_input_section())
1640 this->u2_.posd->reset_address_and_file_offset();
1643 // Finalize the data size.
1646 Output_section::Input_section::finalize_data_size()
1648 if (!this->is_input_section())
1649 this->u2_.posd->finalize_data_size();
1652 // Try to turn an input offset into an output offset. We want to
1653 // return the output offset relative to the start of this
1654 // Input_section in the output section.
1657 Output_section::Input_section::output_offset(
1658 const Relobj* object,
1660 section_offset_type offset,
1661 section_offset_type *poutput) const
1663 if (!this->is_input_section())
1664 return this->u2_.posd->output_offset(object, shndx, offset, poutput);
1667 if (this->shndx_ != shndx || this->u2_.object != object)
1674 // Return whether this is the merge section for the input section
1678 Output_section::Input_section::is_merge_section_for(const Relobj* object,
1679 unsigned int shndx) const
1681 if (this->is_input_section())
1683 return this->u2_.posd->is_merge_section_for(object, shndx);
1686 // Write out the data. We don't have to do anything for an input
1687 // section--they are handled via Object::relocate--but this is where
1688 // we write out the data for an Output_section_data.
1691 Output_section::Input_section::write(Output_file* of)
1693 if (!this->is_input_section())
1694 this->u2_.posd->write(of);
1697 // Write the data to a buffer. As for write(), we don't have to do
1698 // anything for an input section.
1701 Output_section::Input_section::write_to_buffer(unsigned char* buffer)
1703 if (!this->is_input_section())
1704 this->u2_.posd->write_to_buffer(buffer);
1707 // Print to a map file.
1710 Output_section::Input_section::print_to_mapfile(Mapfile* mapfile) const
1712 switch (this->shndx_)
1714 case OUTPUT_SECTION_CODE:
1715 case MERGE_DATA_SECTION_CODE:
1716 case MERGE_STRING_SECTION_CODE:
1717 this->u2_.posd->print_to_mapfile(mapfile);
1721 mapfile->print_input_section(this->u2_.object, this->shndx_);
1726 // Output_section methods.
1728 // Construct an Output_section. NAME will point into a Stringpool.
1730 Output_section::Output_section(const char* name, elfcpp::Elf_Word type,
1731 elfcpp::Elf_Xword flags)
1736 link_section_(NULL),
1738 info_section_(NULL),
1747 first_input_offset_(0),
1749 postprocessing_buffer_(NULL),
1750 needs_symtab_index_(false),
1751 needs_dynsym_index_(false),
1752 should_link_to_symtab_(false),
1753 should_link_to_dynsym_(false),
1754 after_input_sections_(false),
1755 requires_postprocessing_(false),
1756 found_in_sections_clause_(false),
1757 has_load_address_(false),
1758 info_uses_section_index_(false),
1759 may_sort_attached_input_sections_(false),
1760 must_sort_attached_input_sections_(false),
1761 attached_input_sections_are_sorted_(false),
1763 is_relro_local_(false),
1766 // An unallocated section has no address. Forcing this means that
1767 // we don't need special treatment for symbols defined in debug
1769 if ((flags & elfcpp::SHF_ALLOC) == 0)
1770 this->set_address(0);
1773 Output_section::~Output_section()
1777 // Set the entry size.
1780 Output_section::set_entsize(uint64_t v)
1782 if (this->entsize_ == 0)
1785 gold_assert(this->entsize_ == v);
1788 // Add the input section SHNDX, with header SHDR, named SECNAME, in
1789 // OBJECT, to the Output_section. RELOC_SHNDX is the index of a
1790 // relocation section which applies to this section, or 0 if none, or
1791 // -1U if more than one. Return the offset of the input section
1792 // within the output section. Return -1 if the input section will
1793 // receive special handling. In the normal case we don't always keep
1794 // track of input sections for an Output_section. Instead, each
1795 // Object keeps track of the Output_section for each of its input
1796 // sections. However, if HAVE_SECTIONS_SCRIPT is true, we do keep
1797 // track of input sections here; this is used when SECTIONS appears in
1800 template<int size, bool big_endian>
1802 Output_section::add_input_section(Sized_relobj<size, big_endian>* object,
1804 const char* secname,
1805 const elfcpp::Shdr<size, big_endian>& shdr,
1806 unsigned int reloc_shndx,
1807 bool have_sections_script)
1809 elfcpp::Elf_Xword addralign = shdr.get_sh_addralign();
1810 if ((addralign & (addralign - 1)) != 0)
1812 object->error(_("invalid alignment %lu for section \"%s\""),
1813 static_cast<unsigned long>(addralign), secname);
1817 if (addralign > this->addralign_)
1818 this->addralign_ = addralign;
1820 typename elfcpp::Elf_types<size>::Elf_WXword sh_flags = shdr.get_sh_flags();
1821 this->update_flags_for_input_section(sh_flags);
1823 uint64_t entsize = shdr.get_sh_entsize();
1825 // .debug_str is a mergeable string section, but is not always so
1826 // marked by compilers. Mark manually here so we can optimize.
1827 if (strcmp(secname, ".debug_str") == 0)
1829 sh_flags |= (elfcpp::SHF_MERGE | elfcpp::SHF_STRINGS);
1833 // If this is a SHF_MERGE section, we pass all the input sections to
1834 // a Output_data_merge. We don't try to handle relocations for such
1835 // a section. We don't try to handle empty merge sections--they
1836 // mess up the mappings, and are useless anyhow.
1837 if ((sh_flags & elfcpp::SHF_MERGE) != 0
1839 && shdr.get_sh_size() > 0)
1841 if (this->add_merge_input_section(object, shndx, sh_flags,
1842 entsize, addralign))
1844 // Tell the relocation routines that they need to call the
1845 // output_offset method to determine the final address.
1850 off_t offset_in_section = this->current_data_size_for_child();
1851 off_t aligned_offset_in_section = align_address(offset_in_section,
1854 if (aligned_offset_in_section > offset_in_section
1855 && !have_sections_script
1856 && (sh_flags & elfcpp::SHF_EXECINSTR) != 0
1857 && object->target()->has_code_fill())
1859 // We need to add some fill data. Using fill_list_ when
1860 // possible is an optimization, since we will often have fill
1861 // sections without input sections.
1862 off_t fill_len = aligned_offset_in_section - offset_in_section;
1863 if (this->input_sections_.empty())
1864 this->fills_.push_back(Fill(offset_in_section, fill_len));
1867 // FIXME: When relaxing, the size needs to adjust to
1868 // maintain a constant alignment.
1869 std::string fill_data(object->target()->code_fill(fill_len));
1870 Output_data_const* odc = new Output_data_const(fill_data, 1);
1871 this->input_sections_.push_back(Input_section(odc));
1875 this->set_current_data_size_for_child(aligned_offset_in_section
1876 + shdr.get_sh_size());
1878 // We need to keep track of this section if we are already keeping
1879 // track of sections, or if we are relaxing. Also, if this is a
1880 // section which requires sorting, or which may require sorting in
1881 // the future, we keep track of the sections. FIXME: Add test for
1883 if (have_sections_script
1884 || !this->input_sections_.empty()
1885 || this->may_sort_attached_input_sections()
1886 || this->must_sort_attached_input_sections()
1887 || parameters->options().user_set_Map())
1888 this->input_sections_.push_back(Input_section(object, shndx,
1892 return aligned_offset_in_section;
1895 // Add arbitrary data to an output section.
1898 Output_section::add_output_section_data(Output_section_data* posd)
1900 Input_section inp(posd);
1901 this->add_output_section_data(&inp);
1903 if (posd->is_data_size_valid())
1905 off_t offset_in_section = this->current_data_size_for_child();
1906 off_t aligned_offset_in_section = align_address(offset_in_section,
1908 this->set_current_data_size_for_child(aligned_offset_in_section
1909 + posd->data_size());
1913 // Add arbitrary data to an output section by Input_section.
1916 Output_section::add_output_section_data(Input_section* inp)
1918 if (this->input_sections_.empty())
1919 this->first_input_offset_ = this->current_data_size_for_child();
1921 this->input_sections_.push_back(*inp);
1923 uint64_t addralign = inp->addralign();
1924 if (addralign > this->addralign_)
1925 this->addralign_ = addralign;
1927 inp->set_output_section(this);
1930 // Add a merge section to an output section.
1933 Output_section::add_output_merge_section(Output_section_data* posd,
1934 bool is_string, uint64_t entsize)
1936 Input_section inp(posd, is_string, entsize);
1937 this->add_output_section_data(&inp);
1940 // Add an input section to a SHF_MERGE section.
1943 Output_section::add_merge_input_section(Relobj* object, unsigned int shndx,
1944 uint64_t flags, uint64_t entsize,
1947 bool is_string = (flags & elfcpp::SHF_STRINGS) != 0;
1949 // We only merge strings if the alignment is not more than the
1950 // character size. This could be handled, but it's unusual.
1951 if (is_string && addralign > entsize)
1954 Input_section_list::iterator p;
1955 for (p = this->input_sections_.begin();
1956 p != this->input_sections_.end();
1958 if (p->is_merge_section(is_string, entsize, addralign))
1960 p->add_input_section(object, shndx);
1964 // We handle the actual constant merging in Output_merge_data or
1965 // Output_merge_string_data.
1966 Output_section_data* posd;
1968 posd = new Output_merge_data(entsize, addralign);
1974 posd = new Output_merge_string<char>(addralign);
1977 posd = new Output_merge_string<uint16_t>(addralign);
1980 posd = new Output_merge_string<uint32_t>(addralign);
1987 this->add_output_merge_section(posd, is_string, entsize);
1988 posd->add_input_section(object, shndx);
1993 // Given an address OFFSET relative to the start of input section
1994 // SHNDX in OBJECT, return whether this address is being included in
1995 // the final link. This should only be called if SHNDX in OBJECT has
1996 // a special mapping.
1999 Output_section::is_input_address_mapped(const Relobj* object,
2003 for (Input_section_list::const_iterator p = this->input_sections_.begin();
2004 p != this->input_sections_.end();
2007 section_offset_type output_offset;
2008 if (p->output_offset(object, shndx, offset, &output_offset))
2009 return output_offset != -1;
2012 // By default we assume that the address is mapped. This should
2013 // only be called after we have passed all sections to Layout. At
2014 // that point we should know what we are discarding.
2018 // Given an address OFFSET relative to the start of input section
2019 // SHNDX in object OBJECT, return the output offset relative to the
2020 // start of the input section in the output section. This should only
2021 // be called if SHNDX in OBJECT has a special mapping.
2024 Output_section::output_offset(const Relobj* object, unsigned int shndx,
2025 section_offset_type offset) const
2027 // This can only be called meaningfully when layout is complete.
2028 gold_assert(Output_data::is_layout_complete());
2030 for (Input_section_list::const_iterator p = this->input_sections_.begin();
2031 p != this->input_sections_.end();
2034 section_offset_type output_offset;
2035 if (p->output_offset(object, shndx, offset, &output_offset))
2036 return output_offset;
2041 // Return the output virtual address of OFFSET relative to the start
2042 // of input section SHNDX in object OBJECT.
2045 Output_section::output_address(const Relobj* object, unsigned int shndx,
2048 uint64_t addr = this->address() + this->first_input_offset_;
2049 for (Input_section_list::const_iterator p = this->input_sections_.begin();
2050 p != this->input_sections_.end();
2053 addr = align_address(addr, p->addralign());
2054 section_offset_type output_offset;
2055 if (p->output_offset(object, shndx, offset, &output_offset))
2057 if (output_offset == -1)
2059 return addr + output_offset;
2061 addr += p->data_size();
2064 // If we get here, it means that we don't know the mapping for this
2065 // input section. This might happen in principle if
2066 // add_input_section were called before add_output_section_data.
2067 // But it should never actually happen.
2072 // Find the output address of the start of the merged section for
2073 // input section SHNDX in object OBJECT.
2076 Output_section::find_starting_output_address(const Relobj* object,
2078 uint64_t* paddr) const
2080 uint64_t addr = this->address() + this->first_input_offset_;
2081 for (Input_section_list::const_iterator p = this->input_sections_.begin();
2082 p != this->input_sections_.end();
2085 addr = align_address(addr, p->addralign());
2087 // It would be nice if we could use the existing output_offset
2088 // method to get the output offset of input offset 0.
2089 // Unfortunately we don't know for sure that input offset 0 is
2091 if (p->is_merge_section_for(object, shndx))
2097 addr += p->data_size();
2100 // We couldn't find a merge output section for this input section.
2104 // Set the data size of an Output_section. This is where we handle
2105 // setting the addresses of any Output_section_data objects.
2108 Output_section::set_final_data_size()
2110 if (this->input_sections_.empty())
2112 this->set_data_size(this->current_data_size_for_child());
2116 if (this->must_sort_attached_input_sections())
2117 this->sort_attached_input_sections();
2119 uint64_t address = this->address();
2120 off_t startoff = this->offset();
2121 off_t off = startoff + this->first_input_offset_;
2122 for (Input_section_list::iterator p = this->input_sections_.begin();
2123 p != this->input_sections_.end();
2126 off = align_address(off, p->addralign());
2127 p->set_address_and_file_offset(address + (off - startoff), off,
2129 off += p->data_size();
2132 this->set_data_size(off - startoff);
2135 // Reset the address and file offset.
2138 Output_section::do_reset_address_and_file_offset()
2140 for (Input_section_list::iterator p = this->input_sections_.begin();
2141 p != this->input_sections_.end();
2143 p->reset_address_and_file_offset();
2146 // Set the TLS offset. Called only for SHT_TLS sections.
2149 Output_section::do_set_tls_offset(uint64_t tls_base)
2151 this->tls_offset_ = this->address() - tls_base;
2154 // In a few cases we need to sort the input sections attached to an
2155 // output section. This is used to implement the type of constructor
2156 // priority ordering implemented by the GNU linker, in which the
2157 // priority becomes part of the section name and the sections are
2158 // sorted by name. We only do this for an output section if we see an
2159 // attached input section matching ".ctor.*", ".dtor.*",
2160 // ".init_array.*" or ".fini_array.*".
2162 class Output_section::Input_section_sort_entry
2165 Input_section_sort_entry()
2166 : input_section_(), index_(-1U), section_has_name_(false),
2170 Input_section_sort_entry(const Input_section& input_section,
2172 : input_section_(input_section), index_(index),
2173 section_has_name_(input_section.is_input_section())
2175 if (this->section_has_name_)
2177 // This is only called single-threaded from Layout::finalize,
2178 // so it is OK to lock. Unfortunately we have no way to pass
2180 const Task* dummy_task = reinterpret_cast<const Task*>(-1);
2181 Object* obj = input_section.relobj();
2182 Task_lock_obj<Object> tl(dummy_task, obj);
2184 // This is a slow operation, which should be cached in
2185 // Layout::layout if this becomes a speed problem.
2186 this->section_name_ = obj->section_name(input_section.shndx());
2190 // Return the Input_section.
2191 const Input_section&
2192 input_section() const
2194 gold_assert(this->index_ != -1U);
2195 return this->input_section_;
2198 // The index of this entry in the original list. This is used to
2199 // make the sort stable.
2203 gold_assert(this->index_ != -1U);
2204 return this->index_;
2207 // Whether there is a section name.
2209 section_has_name() const
2210 { return this->section_has_name_; }
2212 // The section name.
2214 section_name() const
2216 gold_assert(this->section_has_name_);
2217 return this->section_name_;
2220 // Return true if the section name has a priority. This is assumed
2221 // to be true if it has a dot after the initial dot.
2223 has_priority() const
2225 gold_assert(this->section_has_name_);
2226 return this->section_name_.find('.', 1);
2229 // Return true if this an input file whose base name matches
2230 // FILE_NAME. The base name must have an extension of ".o", and
2231 // must be exactly FILE_NAME.o or FILE_NAME, one character, ".o".
2232 // This is to match crtbegin.o as well as crtbeginS.o without
2233 // getting confused by other possibilities. Overall matching the
2234 // file name this way is a dreadful hack, but the GNU linker does it
2235 // in order to better support gcc, and we need to be compatible.
2237 match_file_name(const char* match_file_name) const
2239 const std::string& file_name(this->input_section_.relobj()->name());
2240 const char* base_name = lbasename(file_name.c_str());
2241 size_t match_len = strlen(match_file_name);
2242 if (strncmp(base_name, match_file_name, match_len) != 0)
2244 size_t base_len = strlen(base_name);
2245 if (base_len != match_len + 2 && base_len != match_len + 3)
2247 return memcmp(base_name + base_len - 2, ".o", 2) == 0;
2251 // The Input_section we are sorting.
2252 Input_section input_section_;
2253 // The index of this Input_section in the original list.
2254 unsigned int index_;
2255 // Whether this Input_section has a section name--it won't if this
2256 // is some random Output_section_data.
2257 bool section_has_name_;
2258 // The section name if there is one.
2259 std::string section_name_;
2262 // Return true if S1 should come before S2 in the output section.
2265 Output_section::Input_section_sort_compare::operator()(
2266 const Output_section::Input_section_sort_entry& s1,
2267 const Output_section::Input_section_sort_entry& s2) const
2269 // crtbegin.o must come first.
2270 bool s1_begin = s1.match_file_name("crtbegin");
2271 bool s2_begin = s2.match_file_name("crtbegin");
2272 if (s1_begin || s2_begin)
2278 return s1.index() < s2.index();
2281 // crtend.o must come last.
2282 bool s1_end = s1.match_file_name("crtend");
2283 bool s2_end = s2.match_file_name("crtend");
2284 if (s1_end || s2_end)
2290 return s1.index() < s2.index();
2293 // We sort all the sections with no names to the end.
2294 if (!s1.section_has_name() || !s2.section_has_name())
2296 if (s1.section_has_name())
2298 if (s2.section_has_name())
2300 return s1.index() < s2.index();
2303 // A section with a priority follows a section without a priority.
2304 // The GNU linker does this for all but .init_array sections; until
2305 // further notice we'll assume that that is an mistake.
2306 bool s1_has_priority = s1.has_priority();
2307 bool s2_has_priority = s2.has_priority();
2308 if (s1_has_priority && !s2_has_priority)
2310 if (!s1_has_priority && s2_has_priority)
2313 // Otherwise we sort by name.
2314 int compare = s1.section_name().compare(s2.section_name());
2318 // Otherwise we keep the input order.
2319 return s1.index() < s2.index();
2322 // Sort the input sections attached to an output section.
2325 Output_section::sort_attached_input_sections()
2327 if (this->attached_input_sections_are_sorted_)
2330 // The only thing we know about an input section is the object and
2331 // the section index. We need the section name. Recomputing this
2332 // is slow but this is an unusual case. If this becomes a speed
2333 // problem we can cache the names as required in Layout::layout.
2335 // We start by building a larger vector holding a copy of each
2336 // Input_section, plus its current index in the list and its name.
2337 std::vector<Input_section_sort_entry> sort_list;
2340 for (Input_section_list::iterator p = this->input_sections_.begin();
2341 p != this->input_sections_.end();
2343 sort_list.push_back(Input_section_sort_entry(*p, i));
2345 // Sort the input sections.
2346 std::sort(sort_list.begin(), sort_list.end(), Input_section_sort_compare());
2348 // Copy the sorted input sections back to our list.
2349 this->input_sections_.clear();
2350 for (std::vector<Input_section_sort_entry>::iterator p = sort_list.begin();
2351 p != sort_list.end();
2353 this->input_sections_.push_back(p->input_section());
2355 // Remember that we sorted the input sections, since we might get
2357 this->attached_input_sections_are_sorted_ = true;
2360 // Write the section header to *OSHDR.
2362 template<int size, bool big_endian>
2364 Output_section::write_header(const Layout* layout,
2365 const Stringpool* secnamepool,
2366 elfcpp::Shdr_write<size, big_endian>* oshdr) const
2368 oshdr->put_sh_name(secnamepool->get_offset(this->name_));
2369 oshdr->put_sh_type(this->type_);
2371 elfcpp::Elf_Xword flags = this->flags_;
2372 if (this->info_section_ != NULL && this->info_uses_section_index_)
2373 flags |= elfcpp::SHF_INFO_LINK;
2374 oshdr->put_sh_flags(flags);
2376 oshdr->put_sh_addr(this->address());
2377 oshdr->put_sh_offset(this->offset());
2378 oshdr->put_sh_size(this->data_size());
2379 if (this->link_section_ != NULL)
2380 oshdr->put_sh_link(this->link_section_->out_shndx());
2381 else if (this->should_link_to_symtab_)
2382 oshdr->put_sh_link(layout->symtab_section()->out_shndx());
2383 else if (this->should_link_to_dynsym_)
2384 oshdr->put_sh_link(layout->dynsym_section()->out_shndx());
2386 oshdr->put_sh_link(this->link_);
2388 elfcpp::Elf_Word info;
2389 if (this->info_section_ != NULL)
2391 if (this->info_uses_section_index_)
2392 info = this->info_section_->out_shndx();
2394 info = this->info_section_->symtab_index();
2396 else if (this->info_symndx_ != NULL)
2397 info = this->info_symndx_->symtab_index();
2400 oshdr->put_sh_info(info);
2402 oshdr->put_sh_addralign(this->addralign_);
2403 oshdr->put_sh_entsize(this->entsize_);
2406 // Write out the data. For input sections the data is written out by
2407 // Object::relocate, but we have to handle Output_section_data objects
2411 Output_section::do_write(Output_file* of)
2413 gold_assert(!this->requires_postprocessing());
2415 off_t output_section_file_offset = this->offset();
2416 for (Fill_list::iterator p = this->fills_.begin();
2417 p != this->fills_.end();
2420 std::string fill_data(parameters->target().code_fill(p->length()));
2421 of->write(output_section_file_offset + p->section_offset(),
2422 fill_data.data(), fill_data.size());
2425 for (Input_section_list::iterator p = this->input_sections_.begin();
2426 p != this->input_sections_.end();
2431 // If a section requires postprocessing, create the buffer to use.
2434 Output_section::create_postprocessing_buffer()
2436 gold_assert(this->requires_postprocessing());
2438 if (this->postprocessing_buffer_ != NULL)
2441 if (!this->input_sections_.empty())
2443 off_t off = this->first_input_offset_;
2444 for (Input_section_list::iterator p = this->input_sections_.begin();
2445 p != this->input_sections_.end();
2448 off = align_address(off, p->addralign());
2449 p->finalize_data_size();
2450 off += p->data_size();
2452 this->set_current_data_size_for_child(off);
2455 off_t buffer_size = this->current_data_size_for_child();
2456 this->postprocessing_buffer_ = new unsigned char[buffer_size];
2459 // Write all the data of an Output_section into the postprocessing
2460 // buffer. This is used for sections which require postprocessing,
2461 // such as compression. Input sections are handled by
2462 // Object::Relocate.
2465 Output_section::write_to_postprocessing_buffer()
2467 gold_assert(this->requires_postprocessing());
2469 unsigned char* buffer = this->postprocessing_buffer();
2470 for (Fill_list::iterator p = this->fills_.begin();
2471 p != this->fills_.end();
2474 std::string fill_data(parameters->target().code_fill(p->length()));
2475 memcpy(buffer + p->section_offset(), fill_data.data(),
2479 off_t off = this->first_input_offset_;
2480 for (Input_section_list::iterator p = this->input_sections_.begin();
2481 p != this->input_sections_.end();
2484 off = align_address(off, p->addralign());
2485 p->write_to_buffer(buffer + off);
2486 off += p->data_size();
2490 // Get the input sections for linker script processing. We leave
2491 // behind the Output_section_data entries. Note that this may be
2492 // slightly incorrect for merge sections. We will leave them behind,
2493 // but it is possible that the script says that they should follow
2494 // some other input sections, as in:
2495 // .rodata { *(.rodata) *(.rodata.cst*) }
2496 // For that matter, we don't handle this correctly:
2497 // .rodata { foo.o(.rodata.cst*) *(.rodata.cst*) }
2498 // With luck this will never matter.
2501 Output_section::get_input_sections(
2503 const std::string& fill,
2504 std::list<std::pair<Relobj*, unsigned int> >* input_sections)
2506 uint64_t orig_address = address;
2508 address = align_address(address, this->addralign());
2510 Input_section_list remaining;
2511 for (Input_section_list::iterator p = this->input_sections_.begin();
2512 p != this->input_sections_.end();
2515 if (p->is_input_section())
2516 input_sections->push_back(std::make_pair(p->relobj(), p->shndx()));
2519 uint64_t aligned_address = align_address(address, p->addralign());
2520 if (aligned_address != address && !fill.empty())
2522 section_size_type length =
2523 convert_to_section_size_type(aligned_address - address);
2524 std::string this_fill;
2525 this_fill.reserve(length);
2526 while (this_fill.length() + fill.length() <= length)
2528 if (this_fill.length() < length)
2529 this_fill.append(fill, 0, length - this_fill.length());
2531 Output_section_data* posd = new Output_data_const(this_fill, 0);
2532 remaining.push_back(Input_section(posd));
2534 address = aligned_address;
2536 remaining.push_back(*p);
2538 p->finalize_data_size();
2539 address += p->data_size();
2543 this->input_sections_.swap(remaining);
2544 this->first_input_offset_ = 0;
2546 uint64_t data_size = address - orig_address;
2547 this->set_current_data_size_for_child(data_size);
2551 // Add an input section from a script.
2554 Output_section::add_input_section_for_script(Relobj* object,
2559 if (addralign > this->addralign_)
2560 this->addralign_ = addralign;
2562 off_t offset_in_section = this->current_data_size_for_child();
2563 off_t aligned_offset_in_section = align_address(offset_in_section,
2566 this->set_current_data_size_for_child(aligned_offset_in_section
2569 this->input_sections_.push_back(Input_section(object, shndx,
2570 data_size, addralign));
2573 // Print to the map file.
2576 Output_section::do_print_to_mapfile(Mapfile* mapfile) const
2578 mapfile->print_output_section(this);
2580 for (Input_section_list::const_iterator p = this->input_sections_.begin();
2581 p != this->input_sections_.end();
2583 p->print_to_mapfile(mapfile);
2586 // Print stats for merge sections to stderr.
2589 Output_section::print_merge_stats()
2591 Input_section_list::iterator p;
2592 for (p = this->input_sections_.begin();
2593 p != this->input_sections_.end();
2595 p->print_merge_stats(this->name_);
2598 // Output segment methods.
2600 Output_segment::Output_segment(elfcpp::Elf_Word type, elfcpp::Elf_Word flags)
2612 is_max_align_known_(false),
2613 are_addresses_set_(false)
2617 // Add an Output_section to an Output_segment.
2620 Output_segment::add_output_section(Output_section* os,
2621 elfcpp::Elf_Word seg_flags)
2623 gold_assert((os->flags() & elfcpp::SHF_ALLOC) != 0);
2624 gold_assert(!this->is_max_align_known_);
2626 // Update the segment flags.
2627 this->flags_ |= seg_flags;
2629 Output_segment::Output_data_list* pdl;
2630 if (os->type() == elfcpp::SHT_NOBITS)
2631 pdl = &this->output_bss_;
2633 pdl = &this->output_data_;
2635 // So that PT_NOTE segments will work correctly, we need to ensure
2636 // that all SHT_NOTE sections are adjacent. This will normally
2637 // happen automatically, because all the SHT_NOTE input sections
2638 // will wind up in the same output section. However, it is possible
2639 // for multiple SHT_NOTE input sections to have different section
2640 // flags, and thus be in different output sections, but for the
2641 // different section flags to map into the same segment flags and
2642 // thus the same output segment.
2644 // Note that while there may be many input sections in an output
2645 // section, there are normally only a few output sections in an
2646 // output segment. This loop is expected to be fast.
2648 if (os->type() == elfcpp::SHT_NOTE && !pdl->empty())
2650 Output_segment::Output_data_list::iterator p = pdl->end();
2654 if ((*p)->is_section_type(elfcpp::SHT_NOTE))
2661 while (p != pdl->begin());
2664 // Similarly, so that PT_TLS segments will work, we need to group
2665 // SHF_TLS sections. An SHF_TLS/SHT_NOBITS section is a special
2666 // case: we group the SHF_TLS/SHT_NOBITS sections right after the
2667 // SHF_TLS/SHT_PROGBITS sections. This lets us set up PT_TLS
2668 // correctly. SHF_TLS sections get added to both a PT_LOAD segment
2669 // and the PT_TLS segment -- we do this grouping only for the
2671 if (this->type_ != elfcpp::PT_TLS
2672 && (os->flags() & elfcpp::SHF_TLS) != 0)
2674 pdl = &this->output_data_;
2675 bool nobits = os->type() == elfcpp::SHT_NOBITS;
2676 bool sawtls = false;
2677 Output_segment::Output_data_list::iterator p = pdl->end();
2682 if ((*p)->is_section_flag_set(elfcpp::SHF_TLS))
2685 // Put a NOBITS section after the first TLS section.
2686 // Put a PROGBITS section after the first TLS/PROGBITS
2688 insert = nobits || !(*p)->is_section_type(elfcpp::SHT_NOBITS);
2692 // If we've gone past the TLS sections, but we've seen a
2693 // TLS section, then we need to insert this section now.
2704 while (p != pdl->begin());
2706 // There are no TLS sections yet; put this one at the requested
2707 // location in the section list.
2710 // For the PT_GNU_RELRO segment, we need to group relro sections,
2711 // and we need to put them before any non-relro sections. Also,
2712 // relro local sections go before relro non-local sections.
2713 if (parameters->options().relro() && os->is_relro())
2715 gold_assert(pdl == &this->output_data_);
2716 Output_segment::Output_data_list::iterator p;
2717 for (p = pdl->begin(); p != pdl->end(); ++p)
2719 if (!(*p)->is_section())
2722 Output_section* pos = (*p)->output_section();
2723 if (!pos->is_relro()
2724 || (os->is_relro_local() && !pos->is_relro_local()))
2735 // Remove an Output_section from this segment. It is an error if it
2739 Output_segment::remove_output_section(Output_section* os)
2741 // We only need this for SHT_PROGBITS.
2742 gold_assert(os->type() == elfcpp::SHT_PROGBITS);
2743 for (Output_data_list::iterator p = this->output_data_.begin();
2744 p != this->output_data_.end();
2749 this->output_data_.erase(p);
2756 // Add an Output_data (which is not an Output_section) to the start of
2760 Output_segment::add_initial_output_data(Output_data* od)
2762 gold_assert(!this->is_max_align_known_);
2763 this->output_data_.push_front(od);
2766 // Return whether the first data section is a relro section.
2769 Output_segment::is_first_section_relro() const
2771 return (!this->output_data_.empty()
2772 && this->output_data_.front()->is_section()
2773 && this->output_data_.front()->output_section()->is_relro());
2776 // Return the maximum alignment of the Output_data in Output_segment.
2779 Output_segment::maximum_alignment()
2781 if (!this->is_max_align_known_)
2785 addralign = Output_segment::maximum_alignment_list(&this->output_data_);
2786 if (addralign > this->max_align_)
2787 this->max_align_ = addralign;
2789 addralign = Output_segment::maximum_alignment_list(&this->output_bss_);
2790 if (addralign > this->max_align_)
2791 this->max_align_ = addralign;
2793 // If -z relro is in effect, and the first section in this
2794 // segment is a relro section, then the segment must be aligned
2795 // to at least the common page size. This ensures that the
2796 // PT_GNU_RELRO segment will start at a page boundary.
2797 if (this->type_ == elfcpp::PT_LOAD
2798 && parameters->options().relro()
2799 && this->is_first_section_relro())
2801 addralign = parameters->target().common_pagesize();
2802 if (addralign > this->max_align_)
2803 this->max_align_ = addralign;
2806 this->is_max_align_known_ = true;
2809 return this->max_align_;
2812 // Return the maximum alignment of a list of Output_data.
2815 Output_segment::maximum_alignment_list(const Output_data_list* pdl)
2818 for (Output_data_list::const_iterator p = pdl->begin();
2822 uint64_t addralign = (*p)->addralign();
2823 if (addralign > ret)
2829 // Return the number of dynamic relocs applied to this segment.
2832 Output_segment::dynamic_reloc_count() const
2834 return (this->dynamic_reloc_count_list(&this->output_data_)
2835 + this->dynamic_reloc_count_list(&this->output_bss_));
2838 // Return the number of dynamic relocs applied to an Output_data_list.
2841 Output_segment::dynamic_reloc_count_list(const Output_data_list* pdl) const
2843 unsigned int count = 0;
2844 for (Output_data_list::const_iterator p = pdl->begin();
2847 count += (*p)->dynamic_reloc_count();
2851 // Set the section addresses for an Output_segment. If RESET is true,
2852 // reset the addresses first. ADDR is the address and *POFF is the
2853 // file offset. Set the section indexes starting with *PSHNDX.
2854 // Return the address of the immediately following segment. Update
2855 // *POFF and *PSHNDX.
2858 Output_segment::set_section_addresses(const Layout* layout, bool reset,
2859 uint64_t addr, off_t* poff,
2860 unsigned int* pshndx)
2862 gold_assert(this->type_ == elfcpp::PT_LOAD);
2864 if (!reset && this->are_addresses_set_)
2866 gold_assert(this->paddr_ == addr);
2867 addr = this->vaddr_;
2871 this->vaddr_ = addr;
2872 this->paddr_ = addr;
2873 this->are_addresses_set_ = true;
2876 bool in_tls = false;
2878 bool in_relro = (parameters->options().relro()
2879 && this->is_first_section_relro());
2881 off_t orig_off = *poff;
2882 this->offset_ = orig_off;
2884 addr = this->set_section_list_addresses(layout, reset, &this->output_data_,
2885 addr, poff, pshndx, &in_tls,
2887 this->filesz_ = *poff - orig_off;
2891 uint64_t ret = this->set_section_list_addresses(layout, reset,
2894 &in_tls, &in_relro);
2896 // If the last section was a TLS section, align upward to the
2897 // alignment of the TLS segment, so that the overall size of the TLS
2898 // segment is aligned.
2901 uint64_t segment_align = layout->tls_segment()->maximum_alignment();
2902 *poff = align_address(*poff, segment_align);
2905 // If all the sections were relro sections, align upward to the
2906 // common page size.
2909 uint64_t page_align = parameters->target().common_pagesize();
2910 *poff = align_address(*poff, page_align);
2913 this->memsz_ = *poff - orig_off;
2915 // Ignore the file offset adjustments made by the BSS Output_data
2922 // Set the addresses and file offsets in a list of Output_data
2926 Output_segment::set_section_list_addresses(const Layout* layout, bool reset,
2927 Output_data_list* pdl,
2928 uint64_t addr, off_t* poff,
2929 unsigned int* pshndx,
2930 bool* in_tls, bool* in_relro)
2932 off_t startoff = *poff;
2934 off_t off = startoff;
2935 for (Output_data_list::iterator p = pdl->begin();
2940 (*p)->reset_address_and_file_offset();
2942 // When using a linker script the section will most likely
2943 // already have an address.
2944 if (!(*p)->is_address_valid())
2946 uint64_t align = (*p)->addralign();
2948 if ((*p)->is_section_flag_set(elfcpp::SHF_TLS))
2950 // Give the first TLS section the alignment of the
2951 // entire TLS segment. Otherwise the TLS segment as a
2952 // whole may be misaligned.
2955 Output_segment* tls_segment = layout->tls_segment();
2956 gold_assert(tls_segment != NULL);
2957 uint64_t segment_align = tls_segment->maximum_alignment();
2958 gold_assert(segment_align >= align);
2959 align = segment_align;
2966 // If this is the first section after the TLS segment,
2967 // align it to at least the alignment of the TLS
2968 // segment, so that the size of the overall TLS segment
2972 uint64_t segment_align =
2973 layout->tls_segment()->maximum_alignment();
2974 if (segment_align > align)
2975 align = segment_align;
2981 // If this is a non-relro section after a relro section,
2982 // align it to a common page boundary so that the dynamic
2983 // linker has a page to mark as read-only.
2985 && (!(*p)->is_section()
2986 || !(*p)->output_section()->is_relro()))
2988 uint64_t page_align = parameters->target().common_pagesize();
2989 if (page_align > align)
2994 off = align_address(off, align);
2995 (*p)->set_address_and_file_offset(addr + (off - startoff), off);
2999 // The script may have inserted a skip forward, but it
3000 // better not have moved backward.
3001 gold_assert((*p)->address() >= addr + (off - startoff));
3002 off += (*p)->address() - (addr + (off - startoff));
3003 (*p)->set_file_offset(off);
3004 (*p)->finalize_data_size();
3007 // We want to ignore the size of a SHF_TLS or SHT_NOBITS
3008 // section. Such a section does not affect the size of a
3010 if (!(*p)->is_section_flag_set(elfcpp::SHF_TLS)
3011 || !(*p)->is_section_type(elfcpp::SHT_NOBITS))
3012 off += (*p)->data_size();
3014 if ((*p)->is_section())
3016 (*p)->set_out_shndx(*pshndx);
3022 return addr + (off - startoff);
3025 // For a non-PT_LOAD segment, set the offset from the sections, if
3029 Output_segment::set_offset()
3031 gold_assert(this->type_ != elfcpp::PT_LOAD);
3033 gold_assert(!this->are_addresses_set_);
3035 if (this->output_data_.empty() && this->output_bss_.empty())
3039 this->are_addresses_set_ = true;
3041 this->min_p_align_ = 0;
3047 const Output_data* first;
3048 if (this->output_data_.empty())
3049 first = this->output_bss_.front();
3051 first = this->output_data_.front();
3052 this->vaddr_ = first->address();
3053 this->paddr_ = (first->has_load_address()
3054 ? first->load_address()
3056 this->are_addresses_set_ = true;
3057 this->offset_ = first->offset();
3059 if (this->output_data_.empty())
3063 const Output_data* last_data = this->output_data_.back();
3064 this->filesz_ = (last_data->address()
3065 + last_data->data_size()
3069 const Output_data* last;
3070 if (this->output_bss_.empty())
3071 last = this->output_data_.back();
3073 last = this->output_bss_.back();
3074 this->memsz_ = (last->address()
3078 // If this is a TLS segment, align the memory size. The code in
3079 // set_section_list ensures that the section after the TLS segment
3080 // is aligned to give us room.
3081 if (this->type_ == elfcpp::PT_TLS)
3083 uint64_t segment_align = this->maximum_alignment();
3084 gold_assert(this->vaddr_ == align_address(this->vaddr_, segment_align));
3085 this->memsz_ = align_address(this->memsz_, segment_align);
3088 // If this is a RELRO segment, align the memory size. The code in
3089 // set_section_list ensures that the section after the RELRO segment
3090 // is aligned to give us room.
3091 if (this->type_ == elfcpp::PT_GNU_RELRO)
3093 uint64_t page_align = parameters->target().common_pagesize();
3094 gold_assert(this->vaddr_ == align_address(this->vaddr_, page_align));
3095 this->memsz_ = align_address(this->memsz_, page_align);
3099 // Set the TLS offsets of the sections in the PT_TLS segment.
3102 Output_segment::set_tls_offsets()
3104 gold_assert(this->type_ == elfcpp::PT_TLS);
3106 for (Output_data_list::iterator p = this->output_data_.begin();
3107 p != this->output_data_.end();
3109 (*p)->set_tls_offset(this->vaddr_);
3111 for (Output_data_list::iterator p = this->output_bss_.begin();
3112 p != this->output_bss_.end();
3114 (*p)->set_tls_offset(this->vaddr_);
3117 // Return the address of the first section.
3120 Output_segment::first_section_load_address() const
3122 for (Output_data_list::const_iterator p = this->output_data_.begin();
3123 p != this->output_data_.end();
3125 if ((*p)->is_section())
3126 return (*p)->has_load_address() ? (*p)->load_address() : (*p)->address();
3128 for (Output_data_list::const_iterator p = this->output_bss_.begin();
3129 p != this->output_bss_.end();
3131 if ((*p)->is_section())
3132 return (*p)->has_load_address() ? (*p)->load_address() : (*p)->address();
3137 // Return the number of Output_sections in an Output_segment.
3140 Output_segment::output_section_count() const
3142 return (this->output_section_count_list(&this->output_data_)
3143 + this->output_section_count_list(&this->output_bss_));
3146 // Return the number of Output_sections in an Output_data_list.
3149 Output_segment::output_section_count_list(const Output_data_list* pdl) const
3151 unsigned int count = 0;
3152 for (Output_data_list::const_iterator p = pdl->begin();
3156 if ((*p)->is_section())
3162 // Return the section attached to the list segment with the lowest
3163 // load address. This is used when handling a PHDRS clause in a
3167 Output_segment::section_with_lowest_load_address() const
3169 Output_section* found = NULL;
3170 uint64_t found_lma = 0;
3171 this->lowest_load_address_in_list(&this->output_data_, &found, &found_lma);
3173 Output_section* found_data = found;
3174 this->lowest_load_address_in_list(&this->output_bss_, &found, &found_lma);
3175 if (found != found_data && found_data != NULL)
3177 gold_error(_("nobits section %s may not precede progbits section %s "
3179 found->name(), found_data->name());
3186 // Look through a list for a section with a lower load address.
3189 Output_segment::lowest_load_address_in_list(const Output_data_list* pdl,
3190 Output_section** found,
3191 uint64_t* found_lma) const
3193 for (Output_data_list::const_iterator p = pdl->begin();
3197 if (!(*p)->is_section())
3199 Output_section* os = static_cast<Output_section*>(*p);
3200 uint64_t lma = (os->has_load_address()
3201 ? os->load_address()
3203 if (*found == NULL || lma < *found_lma)
3211 // Write the segment data into *OPHDR.
3213 template<int size, bool big_endian>
3215 Output_segment::write_header(elfcpp::Phdr_write<size, big_endian>* ophdr)
3217 ophdr->put_p_type(this->type_);
3218 ophdr->put_p_offset(this->offset_);
3219 ophdr->put_p_vaddr(this->vaddr_);
3220 ophdr->put_p_paddr(this->paddr_);
3221 ophdr->put_p_filesz(this->filesz_);
3222 ophdr->put_p_memsz(this->memsz_);
3223 ophdr->put_p_flags(this->flags_);
3224 ophdr->put_p_align(std::max(this->min_p_align_, this->maximum_alignment()));
3227 // Write the section headers into V.
3229 template<int size, bool big_endian>
3231 Output_segment::write_section_headers(const Layout* layout,
3232 const Stringpool* secnamepool,
3234 unsigned int *pshndx) const
3236 // Every section that is attached to a segment must be attached to a
3237 // PT_LOAD segment, so we only write out section headers for PT_LOAD
3239 if (this->type_ != elfcpp::PT_LOAD)
3242 v = this->write_section_headers_list<size, big_endian>(layout, secnamepool,
3243 &this->output_data_,
3245 v = this->write_section_headers_list<size, big_endian>(layout, secnamepool,
3251 template<int size, bool big_endian>
3253 Output_segment::write_section_headers_list(const Layout* layout,
3254 const Stringpool* secnamepool,
3255 const Output_data_list* pdl,
3257 unsigned int* pshndx) const
3259 const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size;
3260 for (Output_data_list::const_iterator p = pdl->begin();
3264 if ((*p)->is_section())
3266 const Output_section* ps = static_cast<const Output_section*>(*p);
3267 gold_assert(*pshndx == ps->out_shndx());
3268 elfcpp::Shdr_write<size, big_endian> oshdr(v);
3269 ps->write_header(layout, secnamepool, &oshdr);
3277 // Print the output sections to the map file.
3280 Output_segment::print_sections_to_mapfile(Mapfile* mapfile) const
3282 if (this->type() != elfcpp::PT_LOAD)
3284 this->print_section_list_to_mapfile(mapfile, &this->output_data_);
3285 this->print_section_list_to_mapfile(mapfile, &this->output_bss_);
3288 // Print an output section list to the map file.
3291 Output_segment::print_section_list_to_mapfile(Mapfile* mapfile,
3292 const Output_data_list* pdl) const
3294 for (Output_data_list::const_iterator p = pdl->begin();
3297 (*p)->print_to_mapfile(mapfile);
3300 // Output_file methods.
3302 Output_file::Output_file(const char* name)
3307 map_is_anonymous_(false),
3308 is_temporary_(false)
3312 // Open the output file.
3315 Output_file::open(off_t file_size)
3317 this->file_size_ = file_size;
3319 // Unlink the file first; otherwise the open() may fail if the file
3320 // is busy (e.g. it's an executable that's currently being executed).
3322 // However, the linker may be part of a system where a zero-length
3323 // file is created for it to write to, with tight permissions (gcc
3324 // 2.95 did something like this). Unlinking the file would work
3325 // around those permission controls, so we only unlink if the file
3326 // has a non-zero size. We also unlink only regular files to avoid
3327 // trouble with directories/etc.
3329 // If we fail, continue; this command is merely a best-effort attempt
3330 // to improve the odds for open().
3332 // We let the name "-" mean "stdout"
3333 if (!this->is_temporary_)
3335 if (strcmp(this->name_, "-") == 0)
3336 this->o_ = STDOUT_FILENO;
3340 if (::stat(this->name_, &s) == 0 && s.st_size != 0)
3341 unlink_if_ordinary(this->name_);
3343 int mode = parameters->options().relocatable() ? 0666 : 0777;
3344 int o = open_descriptor(-1, this->name_, O_RDWR | O_CREAT | O_TRUNC,
3347 gold_fatal(_("%s: open: %s"), this->name_, strerror(errno));
3355 // Resize the output file.
3358 Output_file::resize(off_t file_size)
3360 // If the mmap is mapping an anonymous memory buffer, this is easy:
3361 // just mremap to the new size. If it's mapping to a file, we want
3362 // to unmap to flush to the file, then remap after growing the file.
3363 if (this->map_is_anonymous_)
3365 void* base = ::mremap(this->base_, this->file_size_, file_size,
3367 if (base == MAP_FAILED)
3368 gold_fatal(_("%s: mremap: %s"), this->name_, strerror(errno));
3369 this->base_ = static_cast<unsigned char*>(base);
3370 this->file_size_ = file_size;
3375 this->file_size_ = file_size;
3380 // Map the file into memory.
3385 const int o = this->o_;
3387 // If the output file is not a regular file, don't try to mmap it;
3388 // instead, we'll mmap a block of memory (an anonymous buffer), and
3389 // then later write the buffer to the file.
3391 struct stat statbuf;
3392 if (o == STDOUT_FILENO || o == STDERR_FILENO
3393 || ::fstat(o, &statbuf) != 0
3394 || !S_ISREG(statbuf.st_mode)
3395 || this->is_temporary_)
3397 this->map_is_anonymous_ = true;
3398 base = ::mmap(NULL, this->file_size_, PROT_READ | PROT_WRITE,
3399 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
3403 // Ensure that we have disk space available for the file. If we
3404 // don't do this, it is possible that we will call munmap,
3405 // close, and exit with dirty buffers still in the cache with no
3406 // assigned disk blocks. If the disk is out of space at that
3407 // point, the output file will wind up incomplete, but we will
3408 // have already exited. The alternative to fallocate would be
3409 // to use fdatasync, but that would be a more significant
3411 if (::posix_fallocate(o, 0, this->file_size_) < 0)
3412 gold_fatal(_("%s: %s"), this->name_, strerror(errno));
3414 // Map the file into memory.
3415 this->map_is_anonymous_ = false;
3416 base = ::mmap(NULL, this->file_size_, PROT_READ | PROT_WRITE,
3419 if (base == MAP_FAILED)
3420 gold_fatal(_("%s: mmap: %s"), this->name_, strerror(errno));
3421 this->base_ = static_cast<unsigned char*>(base);
3424 // Unmap the file from memory.
3427 Output_file::unmap()
3429 if (::munmap(this->base_, this->file_size_) < 0)
3430 gold_error(_("%s: munmap: %s"), this->name_, strerror(errno));
3434 // Close the output file.
3437 Output_file::close()
3439 // If the map isn't file-backed, we need to write it now.
3440 if (this->map_is_anonymous_ && !this->is_temporary_)
3442 size_t bytes_to_write = this->file_size_;
3443 while (bytes_to_write > 0)
3445 ssize_t bytes_written = ::write(this->o_, this->base_, bytes_to_write);
3446 if (bytes_written == 0)
3447 gold_error(_("%s: write: unexpected 0 return-value"), this->name_);
3448 else if (bytes_written < 0)
3449 gold_error(_("%s: write: %s"), this->name_, strerror(errno));
3451 bytes_to_write -= bytes_written;
3456 // We don't close stdout or stderr
3457 if (this->o_ != STDOUT_FILENO
3458 && this->o_ != STDERR_FILENO
3459 && !this->is_temporary_)
3460 if (::close(this->o_) < 0)
3461 gold_error(_("%s: close: %s"), this->name_, strerror(errno));
3465 // Instantiate the templates we need. We could use the configure
3466 // script to restrict this to only the ones for implemented targets.
3468 #ifdef HAVE_TARGET_32_LITTLE
3471 Output_section::add_input_section<32, false>(
3472 Sized_relobj<32, false>* object,
3474 const char* secname,
3475 const elfcpp::Shdr<32, false>& shdr,
3476 unsigned int reloc_shndx,
3477 bool have_sections_script);
3480 #ifdef HAVE_TARGET_32_BIG
3483 Output_section::add_input_section<32, true>(
3484 Sized_relobj<32, true>* object,
3486 const char* secname,
3487 const elfcpp::Shdr<32, true>& shdr,
3488 unsigned int reloc_shndx,
3489 bool have_sections_script);
3492 #ifdef HAVE_TARGET_64_LITTLE
3495 Output_section::add_input_section<64, false>(
3496 Sized_relobj<64, false>* object,
3498 const char* secname,
3499 const elfcpp::Shdr<64, false>& shdr,
3500 unsigned int reloc_shndx,
3501 bool have_sections_script);
3504 #ifdef HAVE_TARGET_64_BIG
3507 Output_section::add_input_section<64, true>(
3508 Sized_relobj<64, true>* object,
3510 const char* secname,
3511 const elfcpp::Shdr<64, true>& shdr,
3512 unsigned int reloc_shndx,
3513 bool have_sections_script);
3516 #ifdef HAVE_TARGET_32_LITTLE
3518 class Output_reloc<elfcpp::SHT_REL, false, 32, false>;
3521 #ifdef HAVE_TARGET_32_BIG
3523 class Output_reloc<elfcpp::SHT_REL, false, 32, true>;
3526 #ifdef HAVE_TARGET_64_LITTLE
3528 class Output_reloc<elfcpp::SHT_REL, false, 64, false>;
3531 #ifdef HAVE_TARGET_64_BIG
3533 class Output_reloc<elfcpp::SHT_REL, false, 64, true>;
3536 #ifdef HAVE_TARGET_32_LITTLE
3538 class Output_reloc<elfcpp::SHT_REL, true, 32, false>;
3541 #ifdef HAVE_TARGET_32_BIG
3543 class Output_reloc<elfcpp::SHT_REL, true, 32, true>;
3546 #ifdef HAVE_TARGET_64_LITTLE
3548 class Output_reloc<elfcpp::SHT_REL, true, 64, false>;
3551 #ifdef HAVE_TARGET_64_BIG
3553 class Output_reloc<elfcpp::SHT_REL, true, 64, true>;
3556 #ifdef HAVE_TARGET_32_LITTLE
3558 class Output_reloc<elfcpp::SHT_RELA, false, 32, false>;
3561 #ifdef HAVE_TARGET_32_BIG
3563 class Output_reloc<elfcpp::SHT_RELA, false, 32, true>;
3566 #ifdef HAVE_TARGET_64_LITTLE
3568 class Output_reloc<elfcpp::SHT_RELA, false, 64, false>;
3571 #ifdef HAVE_TARGET_64_BIG
3573 class Output_reloc<elfcpp::SHT_RELA, false, 64, true>;
3576 #ifdef HAVE_TARGET_32_LITTLE
3578 class Output_reloc<elfcpp::SHT_RELA, true, 32, false>;
3581 #ifdef HAVE_TARGET_32_BIG
3583 class Output_reloc<elfcpp::SHT_RELA, true, 32, true>;
3586 #ifdef HAVE_TARGET_64_LITTLE
3588 class Output_reloc<elfcpp::SHT_RELA, true, 64, false>;
3591 #ifdef HAVE_TARGET_64_BIG
3593 class Output_reloc<elfcpp::SHT_RELA, true, 64, true>;
3596 #ifdef HAVE_TARGET_32_LITTLE
3598 class Output_data_reloc<elfcpp::SHT_REL, false, 32, false>;
3601 #ifdef HAVE_TARGET_32_BIG
3603 class Output_data_reloc<elfcpp::SHT_REL, false, 32, true>;
3606 #ifdef HAVE_TARGET_64_LITTLE
3608 class Output_data_reloc<elfcpp::SHT_REL, false, 64, false>;
3611 #ifdef HAVE_TARGET_64_BIG
3613 class Output_data_reloc<elfcpp::SHT_REL, false, 64, true>;
3616 #ifdef HAVE_TARGET_32_LITTLE
3618 class Output_data_reloc<elfcpp::SHT_REL, true, 32, false>;
3621 #ifdef HAVE_TARGET_32_BIG
3623 class Output_data_reloc<elfcpp::SHT_REL, true, 32, true>;
3626 #ifdef HAVE_TARGET_64_LITTLE
3628 class Output_data_reloc<elfcpp::SHT_REL, true, 64, false>;
3631 #ifdef HAVE_TARGET_64_BIG
3633 class Output_data_reloc<elfcpp::SHT_REL, true, 64, true>;
3636 #ifdef HAVE_TARGET_32_LITTLE
3638 class Output_data_reloc<elfcpp::SHT_RELA, false, 32, false>;
3641 #ifdef HAVE_TARGET_32_BIG
3643 class Output_data_reloc<elfcpp::SHT_RELA, false, 32, true>;
3646 #ifdef HAVE_TARGET_64_LITTLE
3648 class Output_data_reloc<elfcpp::SHT_RELA, false, 64, false>;
3651 #ifdef HAVE_TARGET_64_BIG
3653 class Output_data_reloc<elfcpp::SHT_RELA, false, 64, true>;
3656 #ifdef HAVE_TARGET_32_LITTLE
3658 class Output_data_reloc<elfcpp::SHT_RELA, true, 32, false>;
3661 #ifdef HAVE_TARGET_32_BIG
3663 class Output_data_reloc<elfcpp::SHT_RELA, true, 32, true>;
3666 #ifdef HAVE_TARGET_64_LITTLE
3668 class Output_data_reloc<elfcpp::SHT_RELA, true, 64, false>;
3671 #ifdef HAVE_TARGET_64_BIG
3673 class Output_data_reloc<elfcpp::SHT_RELA, true, 64, true>;
3676 #ifdef HAVE_TARGET_32_LITTLE
3678 class Output_relocatable_relocs<elfcpp::SHT_REL, 32, false>;
3681 #ifdef HAVE_TARGET_32_BIG
3683 class Output_relocatable_relocs<elfcpp::SHT_REL, 32, true>;
3686 #ifdef HAVE_TARGET_64_LITTLE
3688 class Output_relocatable_relocs<elfcpp::SHT_REL, 64, false>;
3691 #ifdef HAVE_TARGET_64_BIG
3693 class Output_relocatable_relocs<elfcpp::SHT_REL, 64, true>;
3696 #ifdef HAVE_TARGET_32_LITTLE
3698 class Output_relocatable_relocs<elfcpp::SHT_RELA, 32, false>;
3701 #ifdef HAVE_TARGET_32_BIG
3703 class Output_relocatable_relocs<elfcpp::SHT_RELA, 32, true>;
3706 #ifdef HAVE_TARGET_64_LITTLE
3708 class Output_relocatable_relocs<elfcpp::SHT_RELA, 64, false>;
3711 #ifdef HAVE_TARGET_64_BIG
3713 class Output_relocatable_relocs<elfcpp::SHT_RELA, 64, true>;
3716 #ifdef HAVE_TARGET_32_LITTLE
3718 class Output_data_group<32, false>;
3721 #ifdef HAVE_TARGET_32_BIG
3723 class Output_data_group<32, true>;
3726 #ifdef HAVE_TARGET_64_LITTLE
3728 class Output_data_group<64, false>;
3731 #ifdef HAVE_TARGET_64_BIG
3733 class Output_data_group<64, true>;
3736 #ifdef HAVE_TARGET_32_LITTLE
3738 class Output_data_got<32, false>;
3741 #ifdef HAVE_TARGET_32_BIG
3743 class Output_data_got<32, true>;
3746 #ifdef HAVE_TARGET_64_LITTLE
3748 class Output_data_got<64, false>;
3751 #ifdef HAVE_TARGET_64_BIG
3753 class Output_data_got<64, true>;
3756 } // End namespace gold.