1 // object.cc -- support for an object file for linking in gold
9 #include "target-select.h"
21 // Set the target based on fields in the ELF file header.
24 Object::set_target(int machine, int size, bool big_endian, int osabi,
27 Target* target = select_target(machine, size, big_endian, osabi, abiversion);
30 fprintf(stderr, _("%s: %s: unsupported ELF machine number %d\n"),
31 program_name, this->name().c_str(), machine);
34 this->target_ = target;
37 // Report an error for the elfcpp::Elf_file interface.
40 Object::error(const char* format, ...)
44 fprintf(stderr, "%s: %s: ", program_name, this->name().c_str());
45 va_start(args, format);
46 vfprintf(stderr, format, args);
53 // Return a view of the contents of a section.
56 Object::section_contents(unsigned int shndx, off_t* plen)
58 Location loc(this->do_section_contents(shndx));
59 *plen = loc.data_size;
60 return this->get_view(loc.file_offset, loc.data_size);
63 // Read the section data into SD. This is code common to Sized_relobj
64 // and Sized_dynobj, so we put it into Object.
66 template<int size, bool big_endian>
68 Object::read_section_data(elfcpp::Elf_file<size, big_endian, Object>* elf_file,
69 Read_symbols_data* sd)
71 const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size;
73 // Read the section headers.
74 const off_t shoff = elf_file->shoff();
75 const unsigned int shnum = this->shnum();
76 sd->section_headers = this->get_lasting_view(shoff, shnum * shdr_size);
78 // Read the section names.
79 const unsigned char* pshdrs = sd->section_headers->data();
80 const unsigned char* pshdrnames = pshdrs + elf_file->shstrndx() * shdr_size;
81 typename elfcpp::Shdr<size, big_endian> shdrnames(pshdrnames);
83 if (shdrnames.get_sh_type() != elfcpp::SHT_STRTAB)
86 _("%s: %s: section name section has wrong type: %u\n"),
87 program_name, this->name().c_str(),
88 static_cast<unsigned int>(shdrnames.get_sh_type()));
92 sd->section_names_size = shdrnames.get_sh_size();
93 sd->section_names = this->get_lasting_view(shdrnames.get_sh_offset(),
94 sd->section_names_size);
97 // If NAME is the name of a special .gnu.warning section, arrange for
98 // the warning to be issued. SHNDX is the section index. Return
99 // whether it is a warning section.
102 Object::handle_gnu_warning_section(const char* name, unsigned int shndx,
103 Symbol_table* symtab)
105 const char warn_prefix[] = ".gnu.warning.";
106 const int warn_prefix_len = sizeof warn_prefix - 1;
107 if (strncmp(name, warn_prefix, warn_prefix_len) == 0)
109 symtab->add_warning(name + warn_prefix_len, this, shndx);
115 // Class Sized_relobj.
117 template<int size, bool big_endian>
118 Sized_relobj<size, big_endian>::Sized_relobj(
119 const std::string& name,
120 Input_file* input_file,
122 const elfcpp::Ehdr<size, big_endian>& ehdr)
123 : Relobj(name, input_file, offset),
124 elf_file_(this, ehdr),
126 local_symbol_count_(0),
127 output_local_symbol_count_(0),
129 local_symbol_offset_(0),
134 template<int size, bool big_endian>
135 Sized_relobj<size, big_endian>::~Sized_relobj()
139 // Set up an object file based on the file header. This sets up the
140 // target and reads the section information.
142 template<int size, bool big_endian>
144 Sized_relobj<size, big_endian>::setup(
145 const elfcpp::Ehdr<size, big_endian>& ehdr)
147 this->set_target(ehdr.get_e_machine(), size, big_endian,
148 ehdr.get_e_ident()[elfcpp::EI_OSABI],
149 ehdr.get_e_ident()[elfcpp::EI_ABIVERSION]);
151 const unsigned int shnum = this->elf_file_.shnum();
152 this->set_shnum(shnum);
155 // Find the SHT_SYMTAB section, given the section headers. The ELF
156 // standard says that maybe in the future there can be more than one
157 // SHT_SYMTAB section. Until somebody figures out how that could
158 // work, we assume there is only one.
160 template<int size, bool big_endian>
162 Sized_relobj<size, big_endian>::find_symtab(const unsigned char* pshdrs)
164 const unsigned int shnum = this->shnum();
165 this->symtab_shndx_ = 0;
168 // Look through the sections in reverse order, since gas tends
169 // to put the symbol table at the end.
170 const unsigned char* p = pshdrs + shnum * This::shdr_size;
171 unsigned int i = shnum;
175 p -= This::shdr_size;
176 typename This::Shdr shdr(p);
177 if (shdr.get_sh_type() == elfcpp::SHT_SYMTAB)
179 this->symtab_shndx_ = i;
186 // Read the sections and symbols from an object file.
188 template<int size, bool big_endian>
190 Sized_relobj<size, big_endian>::do_read_symbols(Read_symbols_data* sd)
192 this->read_section_data(&this->elf_file_, sd);
194 const unsigned char* const pshdrs = sd->section_headers->data();
196 this->find_symtab(pshdrs);
198 if (this->symtab_shndx_ == 0)
200 // No symbol table. Weird but legal.
202 sd->symbols_size = 0;
203 sd->symbol_names = NULL;
204 sd->symbol_names_size = 0;
208 // Get the symbol table section header.
209 typename This::Shdr symtabshdr(pshdrs
210 + this->symtab_shndx_ * This::shdr_size);
211 gold_assert(symtabshdr.get_sh_type() == elfcpp::SHT_SYMTAB);
213 // We only need the external symbols.
214 const int sym_size = This::sym_size;
215 const unsigned int loccount = symtabshdr.get_sh_info();
216 this->local_symbol_count_ = loccount;
217 off_t locsize = loccount * sym_size;
218 off_t extoff = symtabshdr.get_sh_offset() + locsize;
219 off_t extsize = symtabshdr.get_sh_size() - locsize;
221 // Read the symbol table.
222 File_view* fvsymtab = this->get_lasting_view(extoff, extsize);
224 // Read the section header for the symbol names.
225 unsigned int strtab_shndx = symtabshdr.get_sh_link();
226 if (strtab_shndx >= this->shnum())
228 fprintf(stderr, _("%s: %s: invalid symbol table name index: %u\n"),
229 program_name, this->name().c_str(), strtab_shndx);
232 typename This::Shdr strtabshdr(pshdrs + strtab_shndx * This::shdr_size);
233 if (strtabshdr.get_sh_type() != elfcpp::SHT_STRTAB)
236 _("%s: %s: symbol table name section has wrong type: %u\n"),
237 program_name, this->name().c_str(),
238 static_cast<unsigned int>(strtabshdr.get_sh_type()));
242 // Read the symbol names.
243 File_view* fvstrtab = this->get_lasting_view(strtabshdr.get_sh_offset(),
244 strtabshdr.get_sh_size());
246 sd->symbols = fvsymtab;
247 sd->symbols_size = extsize;
248 sd->symbol_names = fvstrtab;
249 sd->symbol_names_size = strtabshdr.get_sh_size();
252 // Return whether to include a section group in the link. LAYOUT is
253 // used to keep track of which section groups we have already seen.
254 // INDEX is the index of the section group and SHDR is the section
255 // header. If we do not want to include this group, we set bits in
256 // OMIT for each section which should be discarded.
258 template<int size, bool big_endian>
260 Sized_relobj<size, big_endian>::include_section_group(
263 const elfcpp::Shdr<size, big_endian>& shdr,
264 std::vector<bool>* omit)
266 // Read the section contents.
267 const unsigned char* pcon = this->get_view(shdr.get_sh_offset(),
269 const elfcpp::Elf_Word* pword =
270 reinterpret_cast<const elfcpp::Elf_Word*>(pcon);
272 // The first word contains flags. We only care about COMDAT section
273 // groups. Other section groups are always included in the link
274 // just like ordinary sections.
275 elfcpp::Elf_Word flags = elfcpp::Swap<32, big_endian>::readval(pword);
276 if ((flags & elfcpp::GRP_COMDAT) == 0)
279 // Look up the group signature, which is the name of a symbol. This
280 // is a lot of effort to go to to read a string. Why didn't they
281 // just use the name of the SHT_GROUP section as the group
284 // Get the appropriate symbol table header (this will normally be
285 // the single SHT_SYMTAB section, but in principle it need not be).
286 const unsigned int link = shdr.get_sh_link();
287 typename This::Shdr symshdr(this, this->elf_file_.section_header(link));
289 // Read the symbol table entry.
290 if (shdr.get_sh_info() >= symshdr.get_sh_size() / This::sym_size)
292 fprintf(stderr, _("%s: %s: section group %u info %u out of range\n"),
293 program_name, this->name().c_str(), index, shdr.get_sh_info());
296 off_t symoff = symshdr.get_sh_offset() + shdr.get_sh_info() * This::sym_size;
297 const unsigned char* psym = this->get_view(symoff, This::sym_size);
298 elfcpp::Sym<size, big_endian> sym(psym);
300 // Read the symbol table names.
302 const unsigned char* psymnamesu;
303 psymnamesu = this->section_contents(symshdr.get_sh_link(), &symnamelen);
304 const char* psymnames = reinterpret_cast<const char*>(psymnamesu);
306 // Get the section group signature.
307 if (sym.get_st_name() >= symnamelen)
309 fprintf(stderr, _("%s: %s: symbol %u name offset %u out of range\n"),
310 program_name, this->name().c_str(), shdr.get_sh_info(),
315 const char* signature = psymnames + sym.get_st_name();
317 // It seems that some versions of gas will create a section group
318 // associated with a section symbol, and then fail to give a name to
319 // the section symbol. In such a case, use the name of the section.
322 if (signature[0] == '\0' && sym.get_st_type() == elfcpp::STT_SECTION)
324 secname = this->section_name(sym.get_st_shndx());
325 signature = secname.c_str();
328 // Record this section group, and see whether we've already seen one
329 // with the same signature.
330 if (layout->add_comdat(signature, true))
333 // This is a duplicate. We want to discard the sections in this
335 size_t count = shdr.get_sh_size() / sizeof(elfcpp::Elf_Word);
336 for (size_t i = 1; i < count; ++i)
338 elfcpp::Elf_Word secnum =
339 elfcpp::Swap<32, big_endian>::readval(pword + i);
340 if (secnum >= this->shnum())
343 _("%s: %s: section %u in section group %u out of range"),
344 program_name, this->name().c_str(), secnum,
348 (*omit)[secnum] = true;
354 // Whether to include a linkonce section in the link. NAME is the
355 // name of the section and SHDR is the section header.
357 // Linkonce sections are a GNU extension implemented in the original
358 // GNU linker before section groups were defined. The semantics are
359 // that we only include one linkonce section with a given name. The
360 // name of a linkonce section is normally .gnu.linkonce.T.SYMNAME,
361 // where T is the type of section and SYMNAME is the name of a symbol.
362 // In an attempt to make linkonce sections interact well with section
363 // groups, we try to identify SYMNAME and use it like a section group
364 // signature. We want to block section groups with that signature,
365 // but not other linkonce sections with that signature. We also use
366 // the full name of the linkonce section as a normal section group
369 template<int size, bool big_endian>
371 Sized_relobj<size, big_endian>::include_linkonce_section(
374 const elfcpp::Shdr<size, big_endian>&)
376 const char* symname = strrchr(name, '.') + 1;
377 bool include1 = layout->add_comdat(symname, false);
378 bool include2 = layout->add_comdat(name, true);
379 return include1 && include2;
382 // Lay out the input sections. We walk through the sections and check
383 // whether they should be included in the link. If they should, we
384 // pass them to the Layout object, which will return an output section
387 template<int size, bool big_endian>
389 Sized_relobj<size, big_endian>::do_layout(Symbol_table* symtab,
391 Read_symbols_data* sd)
393 const unsigned int shnum = this->shnum();
397 // Get the section headers.
398 const unsigned char* pshdrs = sd->section_headers->data();
400 // Get the section names.
401 const unsigned char* pnamesu = sd->section_names->data();
402 const char* pnames = reinterpret_cast<const char*>(pnamesu);
404 std::vector<Map_to_output>& map_sections(this->map_to_output());
405 map_sections.resize(shnum);
407 // Keep track of which sections to omit.
408 std::vector<bool> omit(shnum, false);
410 // Skip the first, dummy, section.
411 pshdrs += This::shdr_size;
412 for (unsigned int i = 1; i < shnum; ++i, pshdrs += This::shdr_size)
414 typename This::Shdr shdr(pshdrs);
416 if (shdr.get_sh_name() >= sd->section_names_size)
419 _("%s: %s: bad section name offset for section %u: %lu\n"),
420 program_name, this->name().c_str(), i,
421 static_cast<unsigned long>(shdr.get_sh_name()));
425 const char* name = pnames + shdr.get_sh_name();
427 if (this->handle_gnu_warning_section(name, i, symtab))
429 if (!parameters->output_is_object())
433 bool discard = omit[i];
436 if (shdr.get_sh_type() == elfcpp::SHT_GROUP)
438 if (!this->include_section_group(layout, i, shdr, &omit))
441 else if ((shdr.get_sh_flags() & elfcpp::SHF_GROUP) == 0
442 && Layout::is_linkonce(name))
444 if (!this->include_linkonce_section(layout, name, shdr))
451 // Do not include this section in the link.
452 map_sections[i].output_section = NULL;
457 Output_section* os = layout->layout(this, i, name, shdr, &offset);
459 map_sections[i].output_section = os;
460 map_sections[i].offset = offset;
463 delete sd->section_headers;
464 sd->section_headers = NULL;
465 delete sd->section_names;
466 sd->section_names = NULL;
469 // Add the symbols to the symbol table.
471 template<int size, bool big_endian>
473 Sized_relobj<size, big_endian>::do_add_symbols(Symbol_table* symtab,
474 Read_symbols_data* sd)
476 if (sd->symbols == NULL)
478 gold_assert(sd->symbol_names == NULL);
482 const int sym_size = This::sym_size;
483 size_t symcount = sd->symbols_size / sym_size;
484 if (symcount * sym_size != sd->symbols_size)
487 _("%s: %s: size of symbols is not multiple of symbol size\n"),
488 program_name, this->name().c_str());
492 this->symbols_ = new Symbol*[symcount];
494 const char* sym_names =
495 reinterpret_cast<const char*>(sd->symbol_names->data());
496 symtab->add_from_relobj(this, sd->symbols->data(), symcount, sym_names,
497 sd->symbol_names_size, this->symbols_);
501 delete sd->symbol_names;
502 sd->symbol_names = NULL;
505 // Finalize the local symbols. Here we record the file offset at
506 // which they should be output, we add their names to *POOL, and we
507 // add their values to THIS->LOCAL_VALUES_. Return the symbol index.
508 // This function is always called from the main thread. The actual
509 // output of the local symbols will occur in a separate task.
511 template<int size, bool big_endian>
513 Sized_relobj<size, big_endian>::do_finalize_local_symbols(unsigned int index,
517 gold_assert(this->symtab_shndx_ != -1U);
518 if (this->symtab_shndx_ == 0)
520 // This object has no symbols. Weird but legal.
524 gold_assert(off == static_cast<off_t>(align_address(off, size >> 3)));
526 this->local_symbol_offset_ = off;
528 // Read the symbol table section header.
529 const unsigned int symtab_shndx = this->symtab_shndx_;
530 typename This::Shdr symtabshdr(this,
531 this->elf_file_.section_header(symtab_shndx));
532 gold_assert(symtabshdr.get_sh_type() == elfcpp::SHT_SYMTAB);
534 // Read the local symbols.
535 const int sym_size = This::sym_size;
536 const unsigned int loccount = this->local_symbol_count_;
537 gold_assert(loccount == symtabshdr.get_sh_info());
538 off_t locsize = loccount * sym_size;
539 const unsigned char* psyms = this->get_view(symtabshdr.get_sh_offset(),
542 this->local_values_.resize(loccount);
544 // Read the symbol names.
545 const unsigned int strtab_shndx = symtabshdr.get_sh_link();
547 const unsigned char* pnamesu = this->section_contents(strtab_shndx,
549 const char* pnames = reinterpret_cast<const char*>(pnamesu);
551 // Loop over the local symbols.
553 const std::vector<Map_to_output>& mo(this->map_to_output());
554 unsigned int shnum = this->shnum();
555 unsigned int count = 0;
556 // Skip the first, dummy, symbol.
558 for (unsigned int i = 1; i < loccount; ++i, psyms += sym_size)
560 elfcpp::Sym<size, big_endian> sym(psyms);
562 Symbol_value<size>& lv(this->local_values_[i]);
564 unsigned int shndx = sym.get_st_shndx();
565 lv.set_input_shndx(shndx);
567 if (shndx >= elfcpp::SHN_LORESERVE)
569 if (shndx == elfcpp::SHN_ABS)
570 lv.set_output_value(sym.get_st_value());
573 // FIXME: Handle SHN_XINDEX.
575 _("%s: %s: unknown section index %u "
576 "for local symbol %u\n"),
577 program_name, this->name().c_str(), shndx, i);
586 _("%s: %s: local symbol %u section index %u "
588 program_name, this->name().c_str(), i, shndx);
592 Output_section* os = mo[shndx].output_section;
596 lv.set_output_value(0);
597 lv.set_no_output_symtab_entry();
601 if (mo[shndx].offset == -1)
602 lv.set_input_value(sym.get_st_value());
604 lv.set_output_value(mo[shndx].output_section->address()
606 + sym.get_st_value());
609 // Decide whether this symbol should go into the output file.
611 if (sym.get_st_type() == elfcpp::STT_SECTION)
613 lv.set_no_output_symtab_entry();
617 if (sym.get_st_name() >= strtab_size)
620 _("%s: %s: local symbol %u section name "
621 "out of range: %u >= %u\n"),
622 program_name, this->name().c_str(),
623 i, sym.get_st_name(),
624 static_cast<unsigned int>(strtab_size));
628 const char* name = pnames + sym.get_st_name();
629 pool->add(name, NULL);
630 lv.set_output_symtab_index(index);
635 this->output_local_symbol_count_ = count;
640 // Return the value of a local symbol defined in input section SHNDX,
641 // with value VALUE, adding addend ADDEND. This handles SHF_MERGE
643 template<int size, bool big_endian>
644 typename elfcpp::Elf_types<size>::Elf_Addr
645 Sized_relobj<size, big_endian>::local_value(unsigned int shndx,
647 Address addend) const
649 const std::vector<Map_to_output>& mo(this->map_to_output());
650 Output_section* os = mo[shndx].output_section;
653 gold_assert(mo[shndx].offset == -1);
654 return os->output_address(this, shndx, value + addend);
657 // Write out the local symbols.
659 template<int size, bool big_endian>
661 Sized_relobj<size, big_endian>::write_local_symbols(Output_file* of,
662 const Stringpool* sympool)
664 gold_assert(this->symtab_shndx_ != -1U);
665 if (this->symtab_shndx_ == 0)
667 // This object has no symbols. Weird but legal.
671 // Read the symbol table section header.
672 const unsigned int symtab_shndx = this->symtab_shndx_;
673 typename This::Shdr symtabshdr(this,
674 this->elf_file_.section_header(symtab_shndx));
675 gold_assert(symtabshdr.get_sh_type() == elfcpp::SHT_SYMTAB);
676 const unsigned int loccount = this->local_symbol_count_;
677 gold_assert(loccount == symtabshdr.get_sh_info());
679 // Read the local symbols.
680 const int sym_size = This::sym_size;
681 off_t locsize = loccount * sym_size;
682 const unsigned char* psyms = this->get_view(symtabshdr.get_sh_offset(),
685 // Read the symbol names.
686 const unsigned int strtab_shndx = symtabshdr.get_sh_link();
688 const unsigned char* pnamesu = this->section_contents(strtab_shndx,
690 const char* pnames = reinterpret_cast<const char*>(pnamesu);
692 // Get a view into the output file.
693 off_t output_size = this->output_local_symbol_count_ * sym_size;
694 unsigned char* oview = of->get_output_view(this->local_symbol_offset_,
697 const std::vector<Map_to_output>& mo(this->map_to_output());
699 gold_assert(this->local_values_.size() == loccount);
701 unsigned char* ov = oview;
703 for (unsigned int i = 1; i < loccount; ++i, psyms += sym_size)
705 elfcpp::Sym<size, big_endian> isym(psyms);
707 if (!this->local_values_[i].needs_output_symtab_entry())
710 unsigned int st_shndx = isym.get_st_shndx();
711 if (st_shndx < elfcpp::SHN_LORESERVE)
713 gold_assert(st_shndx < mo.size());
714 if (mo[st_shndx].output_section == NULL)
716 st_shndx = mo[st_shndx].output_section->out_shndx();
719 elfcpp::Sym_write<size, big_endian> osym(ov);
721 gold_assert(isym.get_st_name() < strtab_size);
722 const char* name = pnames + isym.get_st_name();
723 osym.put_st_name(sympool->get_offset(name));
724 osym.put_st_value(this->local_values_[i].value(this, 0));
725 osym.put_st_size(isym.get_st_size());
726 osym.put_st_info(isym.get_st_info());
727 osym.put_st_other(isym.get_st_other());
728 osym.put_st_shndx(st_shndx);
733 gold_assert(ov - oview == output_size);
735 of->write_output_view(this->local_symbol_offset_, output_size, oview);
738 // Input_objects methods.
740 // Add a regular relocatable object to the list. Return false if this
741 // object should be ignored.
744 Input_objects::add_object(Object* obj)
746 if (!obj->is_dynamic())
747 this->relobj_list_.push_back(static_cast<Relobj*>(obj));
750 // See if this is a duplicate SONAME.
751 Dynobj* dynobj = static_cast<Dynobj*>(obj);
753 std::pair<Unordered_set<std::string>::iterator, bool> ins =
754 this->sonames_.insert(dynobj->soname());
757 // We have already seen a dynamic object with this soname.
761 this->dynobj_list_.push_back(dynobj);
764 Target* target = obj->target();
765 if (this->target_ == NULL)
766 this->target_ = target;
767 else if (this->target_ != target)
769 fprintf(stderr, "%s: %s: incompatible target\n",
770 program_name, obj->name().c_str());
777 // Relocate_info methods.
779 // Return a string describing the location of a relocation. This is
780 // only used in error messages.
782 template<int size, bool big_endian>
784 Relocate_info<size, big_endian>::location(size_t relnum, off_t) const
786 std::string ret(this->object->name());
789 snprintf(buf, sizeof buf, "%zu", relnum);
791 ret += " in reloc section ";
792 snprintf(buf, sizeof buf, "%u", this->reloc_shndx);
794 ret += " (" + this->object->section_name(this->reloc_shndx);
795 ret += ") for section ";
796 snprintf(buf, sizeof buf, "%u", this->data_shndx);
798 ret += " (" + this->object->section_name(this->data_shndx) + ")";
802 } // End namespace gold.
807 using namespace gold;
809 // Read an ELF file with the header and return the appropriate
810 // instance of Object.
812 template<int size, bool big_endian>
814 make_elf_sized_object(const std::string& name, Input_file* input_file,
815 off_t offset, const elfcpp::Ehdr<size, big_endian>& ehdr)
817 int et = ehdr.get_e_type();
818 if (et == elfcpp::ET_REL)
820 Sized_relobj<size, big_endian>* obj =
821 new Sized_relobj<size, big_endian>(name, input_file, offset, ehdr);
825 else if (et == elfcpp::ET_DYN)
827 Sized_dynobj<size, big_endian>* obj =
828 new Sized_dynobj<size, big_endian>(name, input_file, offset, ehdr);
834 fprintf(stderr, _("%s: %s: unsupported ELF file type %d\n"),
835 program_name, name.c_str(), et);
840 } // End anonymous namespace.
845 // Read an ELF file and return the appropriate instance of Object.
848 make_elf_object(const std::string& name, Input_file* input_file, off_t offset,
849 const unsigned char* p, off_t bytes)
851 if (bytes < elfcpp::EI_NIDENT)
853 fprintf(stderr, _("%s: %s: ELF file too short\n"),
854 program_name, name.c_str());
858 int v = p[elfcpp::EI_VERSION];
859 if (v != elfcpp::EV_CURRENT)
861 if (v == elfcpp::EV_NONE)
862 fprintf(stderr, _("%s: %s: invalid ELF version 0\n"),
863 program_name, name.c_str());
865 fprintf(stderr, _("%s: %s: unsupported ELF version %d\n"),
866 program_name, name.c_str(), v);
870 int c = p[elfcpp::EI_CLASS];
871 if (c == elfcpp::ELFCLASSNONE)
873 fprintf(stderr, _("%s: %s: invalid ELF class 0\n"),
874 program_name, name.c_str());
877 else if (c != elfcpp::ELFCLASS32
878 && c != elfcpp::ELFCLASS64)
880 fprintf(stderr, _("%s: %s: unsupported ELF class %d\n"),
881 program_name, name.c_str(), c);
885 int d = p[elfcpp::EI_DATA];
886 if (d == elfcpp::ELFDATANONE)
888 fprintf(stderr, _("%s: %s: invalid ELF data encoding\n"),
889 program_name, name.c_str());
892 else if (d != elfcpp::ELFDATA2LSB
893 && d != elfcpp::ELFDATA2MSB)
895 fprintf(stderr, _("%s: %s: unsupported ELF data encoding %d\n"),
896 program_name, name.c_str(), d);
900 bool big_endian = d == elfcpp::ELFDATA2MSB;
902 if (c == elfcpp::ELFCLASS32)
904 if (bytes < elfcpp::Elf_sizes<32>::ehdr_size)
906 fprintf(stderr, _("%s: %s: ELF file too short\n"),
907 program_name, name.c_str());
912 #ifdef HAVE_TARGET_32_BIG
913 elfcpp::Ehdr<32, true> ehdr(p);
914 return make_elf_sized_object<32, true>(name, input_file,
918 _("%s: %s: not configured to support 32-bit big-endian object\n"),
919 program_name, name.c_str());
925 #ifdef HAVE_TARGET_32_LITTLE
926 elfcpp::Ehdr<32, false> ehdr(p);
927 return make_elf_sized_object<32, false>(name, input_file,
931 _("%s: %s: not configured to support 32-bit little-endian object\n"),
932 program_name, name.c_str());
939 if (bytes < elfcpp::Elf_sizes<32>::ehdr_size)
941 fprintf(stderr, _("%s: %s: ELF file too short\n"),
942 program_name, name.c_str());
947 #ifdef HAVE_TARGET_64_BIG
948 elfcpp::Ehdr<64, true> ehdr(p);
949 return make_elf_sized_object<64, true>(name, input_file,
953 _("%s: %s: not configured to support 64-bit big-endian object\n"),
954 program_name, name.c_str());
960 #ifdef HAVE_TARGET_64_LITTLE
961 elfcpp::Ehdr<64, false> ehdr(p);
962 return make_elf_sized_object<64, false>(name, input_file,
966 _("%s: %s: not configured to support 64-bit little-endian object\n"),
967 program_name, name.c_str());
974 // Instantiate the templates we need. We could use the configure
975 // script to restrict this to only the ones for implemented targets.
977 #ifdef HAVE_TARGET_32_LITTLE
979 class Sized_relobj<32, false>;
982 #ifdef HAVE_TARGET_32_BIG
984 class Sized_relobj<32, true>;
987 #ifdef HAVE_TARGET_64_LITTLE
989 class Sized_relobj<64, false>;
992 #ifdef HAVE_TARGET_64_BIG
994 class Sized_relobj<64, true>;
997 #ifdef HAVE_TARGET_32_LITTLE
999 struct Relocate_info<32, false>;
1002 #ifdef HAVE_TARGET_32_BIG
1004 struct Relocate_info<32, true>;
1007 #ifdef HAVE_TARGET_64_LITTLE
1009 struct Relocate_info<64, false>;
1012 #ifdef HAVE_TARGET_64_BIG
1014 struct Relocate_info<64, true>;
1017 } // End namespace gold.