1 // object.cc -- support for an object file for linking in gold
3 // Copyright 2006, 2007, 2008, 2009, 2010, 2011, 2012
4 // Free Software Foundation, Inc.
5 // Written by Ian Lance Taylor <iant@google.com>.
7 // This file is part of gold.
9 // This program is free software; you can redistribute it and/or modify
10 // it under the terms of the GNU General Public License as published by
11 // the Free Software Foundation; either version 3 of the License, or
12 // (at your option) any later version.
14 // This program is distributed in the hope that it will be useful,
15 // but WITHOUT ANY WARRANTY; without even the implied warranty of
16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 // GNU General Public License for more details.
19 // You should have received a copy of the GNU General Public License
20 // along with this program; if not, write to the Free Software
21 // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22 // MA 02110-1301, USA.
30 #include "libiberty.h"
33 #include "target-select.h"
34 #include "dwarf_reader.h"
43 #include "compressed_output.h"
44 #include "incremental.h"
49 // Struct Read_symbols_data.
51 // Destroy any remaining File_view objects and buffers of decompressed
54 Read_symbols_data::~Read_symbols_data()
56 if (this->section_headers
!= NULL
)
57 delete this->section_headers
;
58 if (this->section_names
!= NULL
)
59 delete this->section_names
;
60 if (this->symbols
!= NULL
)
62 if (this->symbol_names
!= NULL
)
63 delete this->symbol_names
;
64 if (this->versym
!= NULL
)
66 if (this->verdef
!= NULL
)
68 if (this->verneed
!= NULL
)
74 // Initialize the symtab_xindex_ array. Find the SHT_SYMTAB_SHNDX
75 // section and read it in. SYMTAB_SHNDX is the index of the symbol
76 // table we care about.
78 template<int size
, bool big_endian
>
80 Xindex::initialize_symtab_xindex(Object
* object
, unsigned int symtab_shndx
)
82 if (!this->symtab_xindex_
.empty())
85 gold_assert(symtab_shndx
!= 0);
87 // Look through the sections in reverse order, on the theory that it
88 // is more likely to be near the end than the beginning.
89 unsigned int i
= object
->shnum();
93 if (object
->section_type(i
) == elfcpp::SHT_SYMTAB_SHNDX
94 && this->adjust_shndx(object
->section_link(i
)) == symtab_shndx
)
96 this->read_symtab_xindex
<size
, big_endian
>(object
, i
, NULL
);
101 object
->error(_("missing SHT_SYMTAB_SHNDX section"));
104 // Read in the symtab_xindex_ array, given the section index of the
105 // SHT_SYMTAB_SHNDX section. If PSHDRS is not NULL, it points at the
108 template<int size
, bool big_endian
>
110 Xindex::read_symtab_xindex(Object
* object
, unsigned int xindex_shndx
,
111 const unsigned char* pshdrs
)
113 section_size_type bytecount
;
114 const unsigned char* contents
;
116 contents
= object
->section_contents(xindex_shndx
, &bytecount
, false);
119 const unsigned char* p
= (pshdrs
121 * elfcpp::Elf_sizes
<size
>::shdr_size
));
122 typename
elfcpp::Shdr
<size
, big_endian
> shdr(p
);
123 bytecount
= convert_to_section_size_type(shdr
.get_sh_size());
124 contents
= object
->get_view(shdr
.get_sh_offset(), bytecount
, true, false);
127 gold_assert(this->symtab_xindex_
.empty());
128 this->symtab_xindex_
.reserve(bytecount
/ 4);
129 for (section_size_type i
= 0; i
< bytecount
; i
+= 4)
131 unsigned int shndx
= elfcpp::Swap
<32, big_endian
>::readval(contents
+ i
);
132 // We preadjust the section indexes we save.
133 this->symtab_xindex_
.push_back(this->adjust_shndx(shndx
));
137 // Symbol symndx has a section of SHN_XINDEX; return the real section
141 Xindex::sym_xindex_to_shndx(Object
* object
, unsigned int symndx
)
143 if (symndx
>= this->symtab_xindex_
.size())
145 object
->error(_("symbol %u out of range for SHT_SYMTAB_SHNDX section"),
147 return elfcpp::SHN_UNDEF
;
149 unsigned int shndx
= this->symtab_xindex_
[symndx
];
150 if (shndx
< elfcpp::SHN_LORESERVE
|| shndx
>= object
->shnum())
152 object
->error(_("extended index for symbol %u out of range: %u"),
154 return elfcpp::SHN_UNDEF
;
161 // Report an error for this object file. This is used by the
162 // elfcpp::Elf_file interface, and also called by the Object code
166 Object::error(const char* format
, ...) const
169 va_start(args
, format
);
171 if (vasprintf(&buf
, format
, args
) < 0)
174 gold_error(_("%s: %s"), this->name().c_str(), buf
);
178 // Return a view of the contents of a section.
181 Object::section_contents(unsigned int shndx
, section_size_type
* plen
,
183 { return this->do_section_contents(shndx
, plen
, cache
); }
185 // Read the section data into SD. This is code common to Sized_relobj_file
186 // and Sized_dynobj, so we put it into Object.
188 template<int size
, bool big_endian
>
190 Object::read_section_data(elfcpp::Elf_file
<size
, big_endian
, Object
>* elf_file
,
191 Read_symbols_data
* sd
)
193 const int shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
195 // Read the section headers.
196 const off_t shoff
= elf_file
->shoff();
197 const unsigned int shnum
= this->shnum();
198 sd
->section_headers
= this->get_lasting_view(shoff
, shnum
* shdr_size
,
201 // Read the section names.
202 const unsigned char* pshdrs
= sd
->section_headers
->data();
203 const unsigned char* pshdrnames
= pshdrs
+ elf_file
->shstrndx() * shdr_size
;
204 typename
elfcpp::Shdr
<size
, big_endian
> shdrnames(pshdrnames
);
206 if (shdrnames
.get_sh_type() != elfcpp::SHT_STRTAB
)
207 this->error(_("section name section has wrong type: %u"),
208 static_cast<unsigned int>(shdrnames
.get_sh_type()));
210 sd
->section_names_size
=
211 convert_to_section_size_type(shdrnames
.get_sh_size());
212 sd
->section_names
= this->get_lasting_view(shdrnames
.get_sh_offset(),
213 sd
->section_names_size
, false,
217 // If NAME is the name of a special .gnu.warning section, arrange for
218 // the warning to be issued. SHNDX is the section index. Return
219 // whether it is a warning section.
222 Object::handle_gnu_warning_section(const char* name
, unsigned int shndx
,
223 Symbol_table
* symtab
)
225 const char warn_prefix
[] = ".gnu.warning.";
226 const int warn_prefix_len
= sizeof warn_prefix
- 1;
227 if (strncmp(name
, warn_prefix
, warn_prefix_len
) == 0)
229 // Read the section contents to get the warning text. It would
230 // be nicer if we only did this if we have to actually issue a
231 // warning. Unfortunately, warnings are issued as we relocate
232 // sections. That means that we can not lock the object then,
233 // as we might try to issue the same warning multiple times
235 section_size_type len
;
236 const unsigned char* contents
= this->section_contents(shndx
, &len
,
240 const char* warning
= name
+ warn_prefix_len
;
241 contents
= reinterpret_cast<const unsigned char*>(warning
);
242 len
= strlen(warning
);
244 std::string
warning(reinterpret_cast<const char*>(contents
), len
);
245 symtab
->add_warning(name
+ warn_prefix_len
, this, warning
);
251 // If NAME is the name of the special section which indicates that
252 // this object was compiled with -fsplit-stack, mark it accordingly.
255 Object::handle_split_stack_section(const char* name
)
257 if (strcmp(name
, ".note.GNU-split-stack") == 0)
259 this->uses_split_stack_
= true;
262 if (strcmp(name
, ".note.GNU-no-split-stack") == 0)
264 this->has_no_split_stack_
= true;
272 // To copy the symbols data read from the file to a local data structure.
273 // This function is called from do_layout only while doing garbage
277 Relobj::copy_symbols_data(Symbols_data
* gc_sd
, Read_symbols_data
* sd
,
278 unsigned int section_header_size
)
280 gc_sd
->section_headers_data
=
281 new unsigned char[(section_header_size
)];
282 memcpy(gc_sd
->section_headers_data
, sd
->section_headers
->data(),
283 section_header_size
);
284 gc_sd
->section_names_data
=
285 new unsigned char[sd
->section_names_size
];
286 memcpy(gc_sd
->section_names_data
, sd
->section_names
->data(),
287 sd
->section_names_size
);
288 gc_sd
->section_names_size
= sd
->section_names_size
;
289 if (sd
->symbols
!= NULL
)
291 gc_sd
->symbols_data
=
292 new unsigned char[sd
->symbols_size
];
293 memcpy(gc_sd
->symbols_data
, sd
->symbols
->data(),
298 gc_sd
->symbols_data
= NULL
;
300 gc_sd
->symbols_size
= sd
->symbols_size
;
301 gc_sd
->external_symbols_offset
= sd
->external_symbols_offset
;
302 if (sd
->symbol_names
!= NULL
)
304 gc_sd
->symbol_names_data
=
305 new unsigned char[sd
->symbol_names_size
];
306 memcpy(gc_sd
->symbol_names_data
, sd
->symbol_names
->data(),
307 sd
->symbol_names_size
);
311 gc_sd
->symbol_names_data
= NULL
;
313 gc_sd
->symbol_names_size
= sd
->symbol_names_size
;
316 // This function determines if a particular section name must be included
317 // in the link. This is used during garbage collection to determine the
318 // roots of the worklist.
321 Relobj::is_section_name_included(const char* name
)
323 if (is_prefix_of(".ctors", name
)
324 || is_prefix_of(".dtors", name
)
325 || is_prefix_of(".note", name
)
326 || is_prefix_of(".init", name
)
327 || is_prefix_of(".fini", name
)
328 || is_prefix_of(".gcc_except_table", name
)
329 || is_prefix_of(".jcr", name
)
330 || is_prefix_of(".preinit_array", name
)
331 || (is_prefix_of(".text", name
)
332 && strstr(name
, "personality"))
333 || (is_prefix_of(".data", name
)
334 && strstr(name
, "personality"))
335 || (is_prefix_of(".sdata", name
)
336 && strstr(name
, "personality"))
337 || (is_prefix_of(".gnu.linkonce.d", name
)
338 && strstr(name
, "personality")))
345 // Finalize the incremental relocation information. Allocates a block
346 // of relocation entries for each symbol, and sets the reloc_bases_
347 // array to point to the first entry in each block. If CLEAR_COUNTS
348 // is TRUE, also clear the per-symbol relocation counters.
351 Relobj::finalize_incremental_relocs(Layout
* layout
, bool clear_counts
)
353 unsigned int nsyms
= this->get_global_symbols()->size();
354 this->reloc_bases_
= new unsigned int[nsyms
];
356 gold_assert(this->reloc_bases_
!= NULL
);
357 gold_assert(layout
->incremental_inputs() != NULL
);
359 unsigned int rindex
= layout
->incremental_inputs()->get_reloc_count();
360 for (unsigned int i
= 0; i
< nsyms
; ++i
)
362 this->reloc_bases_
[i
] = rindex
;
363 rindex
+= this->reloc_counts_
[i
];
365 this->reloc_counts_
[i
] = 0;
367 layout
->incremental_inputs()->set_reloc_count(rindex
);
370 // Class Sized_relobj.
372 // Iterate over local symbols, calling a visitor class V for each GOT offset
373 // associated with a local symbol.
375 template<int size
, bool big_endian
>
377 Sized_relobj
<size
, big_endian
>::do_for_all_local_got_entries(
378 Got_offset_list::Visitor
* v
) const
380 unsigned int nsyms
= this->local_symbol_count();
381 for (unsigned int i
= 0; i
< nsyms
; i
++)
383 Local_got_offsets::const_iterator p
= this->local_got_offsets_
.find(i
);
384 if (p
!= this->local_got_offsets_
.end())
386 const Got_offset_list
* got_offsets
= p
->second
;
387 got_offsets
->for_all_got_offsets(v
);
392 // Class Sized_relobj_file.
394 template<int size
, bool big_endian
>
395 Sized_relobj_file
<size
, big_endian
>::Sized_relobj_file(
396 const std::string
& name
,
397 Input_file
* input_file
,
399 const elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
400 : Sized_relobj
<size
, big_endian
>(name
, input_file
, offset
),
401 elf_file_(this, ehdr
),
403 local_symbol_count_(0),
404 output_local_symbol_count_(0),
405 output_local_dynsym_count_(0),
408 local_symbol_offset_(0),
409 local_dynsym_offset_(0),
411 local_plt_offsets_(),
412 kept_comdat_sections_(),
413 has_eh_frame_(false),
414 discarded_eh_frame_shndx_(-1U),
416 deferred_layout_relocs_(),
417 compressed_sections_()
419 this->e_type_
= ehdr
.get_e_type();
422 template<int size
, bool big_endian
>
423 Sized_relobj_file
<size
, big_endian
>::~Sized_relobj_file()
427 // Set up an object file based on the file header. This sets up the
428 // section information.
430 template<int size
, bool big_endian
>
432 Sized_relobj_file
<size
, big_endian
>::do_setup()
434 const unsigned int shnum
= this->elf_file_
.shnum();
435 this->set_shnum(shnum
);
438 // Find the SHT_SYMTAB section, given the section headers. The ELF
439 // standard says that maybe in the future there can be more than one
440 // SHT_SYMTAB section. Until somebody figures out how that could
441 // work, we assume there is only one.
443 template<int size
, bool big_endian
>
445 Sized_relobj_file
<size
, big_endian
>::find_symtab(const unsigned char* pshdrs
)
447 const unsigned int shnum
= this->shnum();
448 this->symtab_shndx_
= 0;
451 // Look through the sections in reverse order, since gas tends
452 // to put the symbol table at the end.
453 const unsigned char* p
= pshdrs
+ shnum
* This::shdr_size
;
454 unsigned int i
= shnum
;
455 unsigned int xindex_shndx
= 0;
456 unsigned int xindex_link
= 0;
460 p
-= This::shdr_size
;
461 typename
This::Shdr
shdr(p
);
462 if (shdr
.get_sh_type() == elfcpp::SHT_SYMTAB
)
464 this->symtab_shndx_
= i
;
465 if (xindex_shndx
> 0 && xindex_link
== i
)
468 new Xindex(this->elf_file_
.large_shndx_offset());
469 xindex
->read_symtab_xindex
<size
, big_endian
>(this,
472 this->set_xindex(xindex
);
477 // Try to pick up the SHT_SYMTAB_SHNDX section, if there is
478 // one. This will work if it follows the SHT_SYMTAB
480 if (shdr
.get_sh_type() == elfcpp::SHT_SYMTAB_SHNDX
)
483 xindex_link
= this->adjust_shndx(shdr
.get_sh_link());
489 // Return the Xindex structure to use for object with lots of
492 template<int size
, bool big_endian
>
494 Sized_relobj_file
<size
, big_endian
>::do_initialize_xindex()
496 gold_assert(this->symtab_shndx_
!= -1U);
497 Xindex
* xindex
= new Xindex(this->elf_file_
.large_shndx_offset());
498 xindex
->initialize_symtab_xindex
<size
, big_endian
>(this, this->symtab_shndx_
);
502 // Return whether SHDR has the right type and flags to be a GNU
503 // .eh_frame section.
505 template<int size
, bool big_endian
>
507 Sized_relobj_file
<size
, big_endian
>::check_eh_frame_flags(
508 const elfcpp::Shdr
<size
, big_endian
>* shdr
) const
510 elfcpp::Elf_Word sh_type
= shdr
->get_sh_type();
511 return ((sh_type
== elfcpp::SHT_PROGBITS
512 || sh_type
== elfcpp::SHT_X86_64_UNWIND
)
513 && (shdr
->get_sh_flags() & elfcpp::SHF_ALLOC
) != 0);
516 // Find the section header with the given name.
518 template<int size
, bool big_endian
>
520 Sized_relobj_file
<size
, big_endian
>::find_shdr(
521 const unsigned char* pshdrs
,
524 section_size_type names_size
,
525 const unsigned char* hdr
) const
527 const unsigned int shnum
= this->shnum();
528 const unsigned char* hdr_end
= pshdrs
+ This::shdr_size
* shnum
;
535 // We found HDR last time we were called, continue looking.
536 typename
This::Shdr
shdr(hdr
);
537 sh_name
= shdr
.get_sh_name();
541 // Look for the next occurrence of NAME in NAMES.
542 // The fact that .shstrtab produced by current GNU tools is
543 // string merged means we shouldn't have both .not.foo and
544 // .foo in .shstrtab, and multiple .foo sections should all
545 // have the same sh_name. However, this is not guaranteed
546 // by the ELF spec and not all ELF object file producers may
548 size_t len
= strlen(name
) + 1;
549 const char *p
= sh_name
? names
+ sh_name
+ len
: names
;
550 p
= reinterpret_cast<const char*>(memmem(p
, names_size
- (p
- names
),
560 hdr
+= This::shdr_size
;
561 while (hdr
< hdr_end
)
563 typename
This::Shdr
shdr(hdr
);
564 if (shdr
.get_sh_name() == sh_name
)
566 hdr
+= This::shdr_size
;
574 // Return whether there is a GNU .eh_frame section, given the section
575 // headers and the section names.
577 template<int size
, bool big_endian
>
579 Sized_relobj_file
<size
, big_endian
>::find_eh_frame(
580 const unsigned char* pshdrs
,
582 section_size_type names_size
) const
584 const unsigned char* s
= NULL
;
588 s
= this->find_shdr(pshdrs
, ".eh_frame", names
, names_size
, s
);
592 typename
This::Shdr
shdr(s
);
593 if (this->check_eh_frame_flags(&shdr
))
598 // Return TRUE if this is a section whose contents will be needed in the
599 // Add_symbols task. This function is only called for sections that have
600 // already passed the test in is_compressed_debug_section(), so we know
601 // that the section name begins with ".zdebug".
604 need_decompressed_section(const char* name
)
606 // Skip over the ".zdebug" and a quick check for the "_".
611 #ifdef ENABLE_THREADS
612 // Decompressing these sections now will help only if we're
614 if (parameters
->options().threads())
616 // We will need .zdebug_str if this is not an incremental link
617 // (i.e., we are processing string merge sections) or if we need
618 // to build a gdb index.
619 if ((!parameters
->incremental() || parameters
->options().gdb_index())
620 && strcmp(name
, "str") == 0)
623 // We will need these other sections when building a gdb index.
624 if (parameters
->options().gdb_index()
625 && (strcmp(name
, "info") == 0
626 || strcmp(name
, "types") == 0
627 || strcmp(name
, "pubnames") == 0
628 || strcmp(name
, "pubtypes") == 0
629 || strcmp(name
, "ranges") == 0
630 || strcmp(name
, "abbrev") == 0))
635 // Even when single-threaded, we will need .zdebug_str if this is
636 // not an incremental link and we are building a gdb index.
637 // Otherwise, we would decompress the section twice: once for
638 // string merge processing, and once for building the gdb index.
639 if (!parameters
->incremental()
640 && parameters
->options().gdb_index()
641 && strcmp(name
, "str") == 0)
647 // Build a table for any compressed debug sections, mapping each section index
648 // to the uncompressed size and (if needed) the decompressed contents.
650 template<int size
, bool big_endian
>
651 Compressed_section_map
*
652 build_compressed_section_map(
653 const unsigned char* pshdrs
,
656 section_size_type names_size
,
657 Sized_relobj_file
<size
, big_endian
>* obj
)
659 Compressed_section_map
* uncompressed_map
= new Compressed_section_map();
660 const unsigned int shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
661 const unsigned char* p
= pshdrs
+ shdr_size
;
663 for (unsigned int i
= 1; i
< shnum
; ++i
, p
+= shdr_size
)
665 typename
elfcpp::Shdr
<size
, big_endian
> shdr(p
);
666 if (shdr
.get_sh_type() == elfcpp::SHT_PROGBITS
667 && (shdr
.get_sh_flags() & elfcpp::SHF_ALLOC
) == 0)
669 if (shdr
.get_sh_name() >= names_size
)
671 obj
->error(_("bad section name offset for section %u: %lu"),
672 i
, static_cast<unsigned long>(shdr
.get_sh_name()));
676 const char* name
= names
+ shdr
.get_sh_name();
677 if (is_compressed_debug_section(name
))
679 section_size_type len
;
680 const unsigned char* contents
=
681 obj
->section_contents(i
, &len
, false);
682 uint64_t uncompressed_size
= get_uncompressed_size(contents
, len
);
683 Compressed_section_info info
;
684 info
.size
= convert_to_section_size_type(uncompressed_size
);
685 info
.contents
= NULL
;
686 if (uncompressed_size
!= -1ULL)
688 unsigned char* uncompressed_data
= NULL
;
689 if (need_decompressed_section(name
))
691 uncompressed_data
= new unsigned char[uncompressed_size
];
692 if (decompress_input_section(contents
, len
,
695 info
.contents
= uncompressed_data
;
697 delete[] uncompressed_data
;
699 (*uncompressed_map
)[i
] = info
;
704 return uncompressed_map
;
707 // Stash away info for a number of special sections.
708 // Return true if any of the sections found require local symbols to be read.
710 template<int size
, bool big_endian
>
712 Sized_relobj_file
<size
, big_endian
>::do_find_special_sections(
713 Read_symbols_data
* sd
)
715 const unsigned char* const pshdrs
= sd
->section_headers
->data();
716 const unsigned char* namesu
= sd
->section_names
->data();
717 const char* names
= reinterpret_cast<const char*>(namesu
);
719 if (this->find_eh_frame(pshdrs
, names
, sd
->section_names_size
))
720 this->has_eh_frame_
= true;
722 if (memmem(names
, sd
->section_names_size
, ".zdebug_", 8) != NULL
)
723 this->compressed_sections_
724 = build_compressed_section_map(pshdrs
, this->shnum(), names
,
725 sd
->section_names_size
, this);
726 return (this->has_eh_frame_
727 || (!parameters
->options().relocatable()
728 && parameters
->options().gdb_index()
729 && (memmem(names
, sd
->section_names_size
, "debug_info", 12) == 0
730 || memmem(names
, sd
->section_names_size
, "debug_types",
734 // Read the sections and symbols from an object file.
736 template<int size
, bool big_endian
>
738 Sized_relobj_file
<size
, big_endian
>::do_read_symbols(Read_symbols_data
* sd
)
740 this->read_section_data(&this->elf_file_
, sd
);
742 const unsigned char* const pshdrs
= sd
->section_headers
->data();
744 this->find_symtab(pshdrs
);
746 bool need_local_symbols
= this->do_find_special_sections(sd
);
749 sd
->symbols_size
= 0;
750 sd
->external_symbols_offset
= 0;
751 sd
->symbol_names
= NULL
;
752 sd
->symbol_names_size
= 0;
754 if (this->symtab_shndx_
== 0)
756 // No symbol table. Weird but legal.
760 // Get the symbol table section header.
761 typename
This::Shdr
symtabshdr(pshdrs
762 + this->symtab_shndx_
* This::shdr_size
);
763 gold_assert(symtabshdr
.get_sh_type() == elfcpp::SHT_SYMTAB
);
765 // If this object has a .eh_frame section, or if building a .gdb_index
766 // section and there is debug info, we need all the symbols.
767 // Otherwise we only need the external symbols. While it would be
768 // simpler to just always read all the symbols, I've seen object
769 // files with well over 2000 local symbols, which for a 64-bit
770 // object file format is over 5 pages that we don't need to read
773 const int sym_size
= This::sym_size
;
774 const unsigned int loccount
= symtabshdr
.get_sh_info();
775 this->local_symbol_count_
= loccount
;
776 this->local_values_
.resize(loccount
);
777 section_offset_type locsize
= loccount
* sym_size
;
778 off_t dataoff
= symtabshdr
.get_sh_offset();
779 section_size_type datasize
=
780 convert_to_section_size_type(symtabshdr
.get_sh_size());
781 off_t extoff
= dataoff
+ locsize
;
782 section_size_type extsize
= datasize
- locsize
;
784 off_t readoff
= need_local_symbols
? dataoff
: extoff
;
785 section_size_type readsize
= need_local_symbols
? datasize
: extsize
;
789 // No external symbols. Also weird but also legal.
793 File_view
* fvsymtab
= this->get_lasting_view(readoff
, readsize
, true, false);
795 // Read the section header for the symbol names.
796 unsigned int strtab_shndx
= this->adjust_shndx(symtabshdr
.get_sh_link());
797 if (strtab_shndx
>= this->shnum())
799 this->error(_("invalid symbol table name index: %u"), strtab_shndx
);
802 typename
This::Shdr
strtabshdr(pshdrs
+ strtab_shndx
* This::shdr_size
);
803 if (strtabshdr
.get_sh_type() != elfcpp::SHT_STRTAB
)
805 this->error(_("symbol table name section has wrong type: %u"),
806 static_cast<unsigned int>(strtabshdr
.get_sh_type()));
810 // Read the symbol names.
811 File_view
* fvstrtab
= this->get_lasting_view(strtabshdr
.get_sh_offset(),
812 strtabshdr
.get_sh_size(),
815 sd
->symbols
= fvsymtab
;
816 sd
->symbols_size
= readsize
;
817 sd
->external_symbols_offset
= need_local_symbols
? locsize
: 0;
818 sd
->symbol_names
= fvstrtab
;
819 sd
->symbol_names_size
=
820 convert_to_section_size_type(strtabshdr
.get_sh_size());
823 // Return the section index of symbol SYM. Set *VALUE to its value in
824 // the object file. Set *IS_ORDINARY if this is an ordinary section
825 // index, not a special code between SHN_LORESERVE and SHN_HIRESERVE.
826 // Note that for a symbol which is not defined in this object file,
827 // this will set *VALUE to 0 and return SHN_UNDEF; it will not return
828 // the final value of the symbol in the link.
830 template<int size
, bool big_endian
>
832 Sized_relobj_file
<size
, big_endian
>::symbol_section_and_value(unsigned int sym
,
836 section_size_type symbols_size
;
837 const unsigned char* symbols
= this->section_contents(this->symtab_shndx_
,
841 const size_t count
= symbols_size
/ This::sym_size
;
842 gold_assert(sym
< count
);
844 elfcpp::Sym
<size
, big_endian
> elfsym(symbols
+ sym
* This::sym_size
);
845 *value
= elfsym
.get_st_value();
847 return this->adjust_sym_shndx(sym
, elfsym
.get_st_shndx(), is_ordinary
);
850 // Return whether to include a section group in the link. LAYOUT is
851 // used to keep track of which section groups we have already seen.
852 // INDEX is the index of the section group and SHDR is the section
853 // header. If we do not want to include this group, we set bits in
854 // OMIT for each section which should be discarded.
856 template<int size
, bool big_endian
>
858 Sized_relobj_file
<size
, big_endian
>::include_section_group(
859 Symbol_table
* symtab
,
863 const unsigned char* shdrs
,
864 const char* section_names
,
865 section_size_type section_names_size
,
866 std::vector
<bool>* omit
)
868 // Read the section contents.
869 typename
This::Shdr
shdr(shdrs
+ index
* This::shdr_size
);
870 const unsigned char* pcon
= this->get_view(shdr
.get_sh_offset(),
871 shdr
.get_sh_size(), true, false);
872 const elfcpp::Elf_Word
* pword
=
873 reinterpret_cast<const elfcpp::Elf_Word
*>(pcon
);
875 // The first word contains flags. We only care about COMDAT section
876 // groups. Other section groups are always included in the link
877 // just like ordinary sections.
878 elfcpp::Elf_Word flags
= elfcpp::Swap
<32, big_endian
>::readval(pword
);
880 // Look up the group signature, which is the name of a symbol. ELF
881 // uses a symbol name because some group signatures are long, and
882 // the name is generally already in the symbol table, so it makes
883 // sense to put the long string just once in .strtab rather than in
884 // both .strtab and .shstrtab.
886 // Get the appropriate symbol table header (this will normally be
887 // the single SHT_SYMTAB section, but in principle it need not be).
888 const unsigned int link
= this->adjust_shndx(shdr
.get_sh_link());
889 typename
This::Shdr
symshdr(this, this->elf_file_
.section_header(link
));
891 // Read the symbol table entry.
892 unsigned int symndx
= shdr
.get_sh_info();
893 if (symndx
>= symshdr
.get_sh_size() / This::sym_size
)
895 this->error(_("section group %u info %u out of range"),
899 off_t symoff
= symshdr
.get_sh_offset() + symndx
* This::sym_size
;
900 const unsigned char* psym
= this->get_view(symoff
, This::sym_size
, true,
902 elfcpp::Sym
<size
, big_endian
> sym(psym
);
904 // Read the symbol table names.
905 section_size_type symnamelen
;
906 const unsigned char* psymnamesu
;
907 psymnamesu
= this->section_contents(this->adjust_shndx(symshdr
.get_sh_link()),
909 const char* psymnames
= reinterpret_cast<const char*>(psymnamesu
);
911 // Get the section group signature.
912 if (sym
.get_st_name() >= symnamelen
)
914 this->error(_("symbol %u name offset %u out of range"),
915 symndx
, sym
.get_st_name());
919 std::string
signature(psymnames
+ sym
.get_st_name());
921 // It seems that some versions of gas will create a section group
922 // associated with a section symbol, and then fail to give a name to
923 // the section symbol. In such a case, use the name of the section.
924 if (signature
[0] == '\0' && sym
.get_st_type() == elfcpp::STT_SECTION
)
927 unsigned int sym_shndx
= this->adjust_sym_shndx(symndx
,
930 if (!is_ordinary
|| sym_shndx
>= this->shnum())
932 this->error(_("symbol %u invalid section index %u"),
936 typename
This::Shdr
member_shdr(shdrs
+ sym_shndx
* This::shdr_size
);
937 if (member_shdr
.get_sh_name() < section_names_size
)
938 signature
= section_names
+ member_shdr
.get_sh_name();
941 // Record this section group in the layout, and see whether we've already
942 // seen one with the same signature.
945 Kept_section
* kept_section
= NULL
;
947 if ((flags
& elfcpp::GRP_COMDAT
) == 0)
949 include_group
= true;
954 include_group
= layout
->find_or_add_kept_section(signature
,
956 true, &kept_section
);
960 if (is_comdat
&& include_group
)
962 Incremental_inputs
* incremental_inputs
= layout
->incremental_inputs();
963 if (incremental_inputs
!= NULL
)
964 incremental_inputs
->report_comdat_group(this, signature
.c_str());
967 size_t count
= shdr
.get_sh_size() / sizeof(elfcpp::Elf_Word
);
969 std::vector
<unsigned int> shndxes
;
970 bool relocate_group
= include_group
&& parameters
->options().relocatable();
972 shndxes
.reserve(count
- 1);
974 for (size_t i
= 1; i
< count
; ++i
)
976 elfcpp::Elf_Word shndx
=
977 this->adjust_shndx(elfcpp::Swap
<32, big_endian
>::readval(pword
+ i
));
980 shndxes
.push_back(shndx
);
982 if (shndx
>= this->shnum())
984 this->error(_("section %u in section group %u out of range"),
989 // Check for an earlier section number, since we're going to get
990 // it wrong--we may have already decided to include the section.
992 this->error(_("invalid section group %u refers to earlier section %u"),
995 // Get the name of the member section.
996 typename
This::Shdr
member_shdr(shdrs
+ shndx
* This::shdr_size
);
997 if (member_shdr
.get_sh_name() >= section_names_size
)
999 // This is an error, but it will be diagnosed eventually
1000 // in do_layout, so we don't need to do anything here but
1004 std::string
mname(section_names
+ member_shdr
.get_sh_name());
1009 kept_section
->add_comdat_section(mname
, shndx
,
1010 member_shdr
.get_sh_size());
1014 (*omit
)[shndx
] = true;
1018 Relobj
* kept_object
= kept_section
->object();
1019 if (kept_section
->is_comdat())
1021 // Find the corresponding kept section, and store
1022 // that info in the discarded section table.
1023 unsigned int kept_shndx
;
1025 if (kept_section
->find_comdat_section(mname
, &kept_shndx
,
1028 // We don't keep a mapping for this section if
1029 // it has a different size. The mapping is only
1030 // used for relocation processing, and we don't
1031 // want to treat the sections as similar if the
1032 // sizes are different. Checking the section
1033 // size is the approach used by the GNU linker.
1034 if (kept_size
== member_shdr
.get_sh_size())
1035 this->set_kept_comdat_section(shndx
, kept_object
,
1041 // The existing section is a linkonce section. Add
1042 // a mapping if there is exactly one section in the
1043 // group (which is true when COUNT == 2) and if it
1044 // is the same size.
1046 && (kept_section
->linkonce_size()
1047 == member_shdr
.get_sh_size()))
1048 this->set_kept_comdat_section(shndx
, kept_object
,
1049 kept_section
->shndx());
1056 layout
->layout_group(symtab
, this, index
, name
, signature
.c_str(),
1057 shdr
, flags
, &shndxes
);
1059 return include_group
;
1062 // Whether to include a linkonce section in the link. NAME is the
1063 // name of the section and SHDR is the section header.
1065 // Linkonce sections are a GNU extension implemented in the original
1066 // GNU linker before section groups were defined. The semantics are
1067 // that we only include one linkonce section with a given name. The
1068 // name of a linkonce section is normally .gnu.linkonce.T.SYMNAME,
1069 // where T is the type of section and SYMNAME is the name of a symbol.
1070 // In an attempt to make linkonce sections interact well with section
1071 // groups, we try to identify SYMNAME and use it like a section group
1072 // signature. We want to block section groups with that signature,
1073 // but not other linkonce sections with that signature. We also use
1074 // the full name of the linkonce section as a normal section group
1077 template<int size
, bool big_endian
>
1079 Sized_relobj_file
<size
, big_endian
>::include_linkonce_section(
1083 const elfcpp::Shdr
<size
, big_endian
>& shdr
)
1085 typename
elfcpp::Elf_types
<size
>::Elf_WXword sh_size
= shdr
.get_sh_size();
1086 // In general the symbol name we want will be the string following
1087 // the last '.'. However, we have to handle the case of
1088 // .gnu.linkonce.t.__i686.get_pc_thunk.bx, which was generated by
1089 // some versions of gcc. So we use a heuristic: if the name starts
1090 // with ".gnu.linkonce.t.", we use everything after that. Otherwise
1091 // we look for the last '.'. We can't always simply skip
1092 // ".gnu.linkonce.X", because we have to deal with cases like
1093 // ".gnu.linkonce.d.rel.ro.local".
1094 const char* const linkonce_t
= ".gnu.linkonce.t.";
1095 const char* symname
;
1096 if (strncmp(name
, linkonce_t
, strlen(linkonce_t
)) == 0)
1097 symname
= name
+ strlen(linkonce_t
);
1099 symname
= strrchr(name
, '.') + 1;
1100 std::string
sig1(symname
);
1101 std::string
sig2(name
);
1102 Kept_section
* kept1
;
1103 Kept_section
* kept2
;
1104 bool include1
= layout
->find_or_add_kept_section(sig1
, this, index
, false,
1106 bool include2
= layout
->find_or_add_kept_section(sig2
, this, index
, false,
1111 // We are not including this section because we already saw the
1112 // name of the section as a signature. This normally implies
1113 // that the kept section is another linkonce section. If it is
1114 // the same size, record it as the section which corresponds to
1116 if (kept2
->object() != NULL
1117 && !kept2
->is_comdat()
1118 && kept2
->linkonce_size() == sh_size
)
1119 this->set_kept_comdat_section(index
, kept2
->object(), kept2
->shndx());
1123 // The section is being discarded on the basis of its symbol
1124 // name. This means that the corresponding kept section was
1125 // part of a comdat group, and it will be difficult to identify
1126 // the specific section within that group that corresponds to
1127 // this linkonce section. We'll handle the simple case where
1128 // the group has only one member section. Otherwise, it's not
1129 // worth the effort.
1130 unsigned int kept_shndx
;
1132 if (kept1
->object() != NULL
1133 && kept1
->is_comdat()
1134 && kept1
->find_single_comdat_section(&kept_shndx
, &kept_size
)
1135 && kept_size
== sh_size
)
1136 this->set_kept_comdat_section(index
, kept1
->object(), kept_shndx
);
1140 kept1
->set_linkonce_size(sh_size
);
1141 kept2
->set_linkonce_size(sh_size
);
1144 return include1
&& include2
;
1147 // Layout an input section.
1149 template<int size
, bool big_endian
>
1151 Sized_relobj_file
<size
, big_endian
>::layout_section(
1155 const typename
This::Shdr
& shdr
,
1156 unsigned int reloc_shndx
,
1157 unsigned int reloc_type
)
1160 Output_section
* os
= layout
->layout(this, shndx
, name
, shdr
,
1161 reloc_shndx
, reloc_type
, &offset
);
1163 this->output_sections()[shndx
] = os
;
1165 this->section_offsets()[shndx
] = invalid_address
;
1167 this->section_offsets()[shndx
] = convert_types
<Address
, off_t
>(offset
);
1169 // If this section requires special handling, and if there are
1170 // relocs that apply to it, then we must do the special handling
1171 // before we apply the relocs.
1172 if (offset
== -1 && reloc_shndx
!= 0)
1173 this->set_relocs_must_follow_section_writes();
1176 // Layout an input .eh_frame section.
1178 template<int size
, bool big_endian
>
1180 Sized_relobj_file
<size
, big_endian
>::layout_eh_frame_section(
1182 const unsigned char* symbols_data
,
1183 section_size_type symbols_size
,
1184 const unsigned char* symbol_names_data
,
1185 section_size_type symbol_names_size
,
1187 const typename
This::Shdr
& shdr
,
1188 unsigned int reloc_shndx
,
1189 unsigned int reloc_type
)
1191 gold_assert(this->has_eh_frame_
);
1194 Output_section
* os
= layout
->layout_eh_frame(this,
1204 this->output_sections()[shndx
] = os
;
1205 if (os
== NULL
|| offset
== -1)
1207 // An object can contain at most one section holding exception
1208 // frame information.
1209 gold_assert(this->discarded_eh_frame_shndx_
== -1U);
1210 this->discarded_eh_frame_shndx_
= shndx
;
1211 this->section_offsets()[shndx
] = invalid_address
;
1214 this->section_offsets()[shndx
] = convert_types
<Address
, off_t
>(offset
);
1216 // If this section requires special handling, and if there are
1217 // relocs that aply to it, then we must do the special handling
1218 // before we apply the relocs.
1219 if (os
!= NULL
&& offset
== -1 && reloc_shndx
!= 0)
1220 this->set_relocs_must_follow_section_writes();
1223 // Lay out the input sections. We walk through the sections and check
1224 // whether they should be included in the link. If they should, we
1225 // pass them to the Layout object, which will return an output section
1227 // This function is called twice sometimes, two passes, when mapping
1228 // of input sections to output sections must be delayed.
1229 // This is true for the following :
1230 // * Garbage collection (--gc-sections): Some input sections will be
1231 // discarded and hence the assignment must wait until the second pass.
1232 // In the first pass, it is for setting up some sections as roots to
1233 // a work-list for --gc-sections and to do comdat processing.
1234 // * Identical Code Folding (--icf=<safe,all>): Some input sections
1235 // will be folded and hence the assignment must wait.
1236 // * Using plugins to map some sections to unique segments: Mapping
1237 // some sections to unique segments requires mapping them to unique
1238 // output sections too. This can be done via plugins now and this
1239 // information is not available in the first pass.
1241 template<int size
, bool big_endian
>
1243 Sized_relobj_file
<size
, big_endian
>::do_layout(Symbol_table
* symtab
,
1245 Read_symbols_data
* sd
)
1247 const unsigned int shnum
= this->shnum();
1249 /* Should this function be called twice? */
1250 bool is_two_pass
= (parameters
->options().gc_sections()
1251 || parameters
->options().icf_enabled()
1252 || layout
->is_unique_segment_for_sections_specified());
1254 /* Only one of is_pass_one and is_pass_two is true. Both are false when
1255 a two-pass approach is not needed. */
1256 bool is_pass_one
= false;
1257 bool is_pass_two
= false;
1259 Symbols_data
* gc_sd
= NULL
;
1261 /* Check if do_layout needs to be two-pass. If so, find out which pass
1262 should happen. In the first pass, the data in sd is saved to be used
1263 later in the second pass. */
1266 gc_sd
= this->get_symbols_data();
1269 gold_assert(sd
!= NULL
);
1274 if (parameters
->options().gc_sections())
1275 gold_assert(symtab
->gc()->is_worklist_ready());
1276 if (parameters
->options().icf_enabled())
1277 gold_assert(symtab
->icf()->is_icf_ready());
1287 // During garbage collection save the symbols data to use it when
1288 // re-entering this function.
1289 gc_sd
= new Symbols_data
;
1290 this->copy_symbols_data(gc_sd
, sd
, This::shdr_size
* shnum
);
1291 this->set_symbols_data(gc_sd
);
1294 const unsigned char* section_headers_data
= NULL
;
1295 section_size_type section_names_size
;
1296 const unsigned char* symbols_data
= NULL
;
1297 section_size_type symbols_size
;
1298 const unsigned char* symbol_names_data
= NULL
;
1299 section_size_type symbol_names_size
;
1303 section_headers_data
= gc_sd
->section_headers_data
;
1304 section_names_size
= gc_sd
->section_names_size
;
1305 symbols_data
= gc_sd
->symbols_data
;
1306 symbols_size
= gc_sd
->symbols_size
;
1307 symbol_names_data
= gc_sd
->symbol_names_data
;
1308 symbol_names_size
= gc_sd
->symbol_names_size
;
1312 section_headers_data
= sd
->section_headers
->data();
1313 section_names_size
= sd
->section_names_size
;
1314 if (sd
->symbols
!= NULL
)
1315 symbols_data
= sd
->symbols
->data();
1316 symbols_size
= sd
->symbols_size
;
1317 if (sd
->symbol_names
!= NULL
)
1318 symbol_names_data
= sd
->symbol_names
->data();
1319 symbol_names_size
= sd
->symbol_names_size
;
1322 // Get the section headers.
1323 const unsigned char* shdrs
= section_headers_data
;
1324 const unsigned char* pshdrs
;
1326 // Get the section names.
1327 const unsigned char* pnamesu
= (is_two_pass
1328 ? gc_sd
->section_names_data
1329 : sd
->section_names
->data());
1331 const char* pnames
= reinterpret_cast<const char*>(pnamesu
);
1333 // If any input files have been claimed by plugins, we need to defer
1334 // actual layout until the replacement files have arrived.
1335 const bool should_defer_layout
=
1336 (parameters
->options().has_plugins()
1337 && parameters
->options().plugins()->should_defer_layout());
1338 unsigned int num_sections_to_defer
= 0;
1340 // For each section, record the index of the reloc section if any.
1341 // Use 0 to mean that there is no reloc section, -1U to mean that
1342 // there is more than one.
1343 std::vector
<unsigned int> reloc_shndx(shnum
, 0);
1344 std::vector
<unsigned int> reloc_type(shnum
, elfcpp::SHT_NULL
);
1345 // Skip the first, dummy, section.
1346 pshdrs
= shdrs
+ This::shdr_size
;
1347 for (unsigned int i
= 1; i
< shnum
; ++i
, pshdrs
+= This::shdr_size
)
1349 typename
This::Shdr
shdr(pshdrs
);
1351 // Count the number of sections whose layout will be deferred.
1352 if (should_defer_layout
&& (shdr
.get_sh_flags() & elfcpp::SHF_ALLOC
))
1353 ++num_sections_to_defer
;
1355 unsigned int sh_type
= shdr
.get_sh_type();
1356 if (sh_type
== elfcpp::SHT_REL
|| sh_type
== elfcpp::SHT_RELA
)
1358 unsigned int target_shndx
= this->adjust_shndx(shdr
.get_sh_info());
1359 if (target_shndx
== 0 || target_shndx
>= shnum
)
1361 this->error(_("relocation section %u has bad info %u"),
1366 if (reloc_shndx
[target_shndx
] != 0)
1367 reloc_shndx
[target_shndx
] = -1U;
1370 reloc_shndx
[target_shndx
] = i
;
1371 reloc_type
[target_shndx
] = sh_type
;
1376 Output_sections
& out_sections(this->output_sections());
1377 std::vector
<Address
>& out_section_offsets(this->section_offsets());
1381 out_sections
.resize(shnum
);
1382 out_section_offsets
.resize(shnum
);
1385 // If we are only linking for symbols, then there is nothing else to
1387 if (this->input_file()->just_symbols())
1391 delete sd
->section_headers
;
1392 sd
->section_headers
= NULL
;
1393 delete sd
->section_names
;
1394 sd
->section_names
= NULL
;
1399 if (num_sections_to_defer
> 0)
1401 parameters
->options().plugins()->add_deferred_layout_object(this);
1402 this->deferred_layout_
.reserve(num_sections_to_defer
);
1405 // Whether we've seen a .note.GNU-stack section.
1406 bool seen_gnu_stack
= false;
1407 // The flags of a .note.GNU-stack section.
1408 uint64_t gnu_stack_flags
= 0;
1410 // Keep track of which sections to omit.
1411 std::vector
<bool> omit(shnum
, false);
1413 // Keep track of reloc sections when emitting relocations.
1414 const bool relocatable
= parameters
->options().relocatable();
1415 const bool emit_relocs
= (relocatable
1416 || parameters
->options().emit_relocs());
1417 std::vector
<unsigned int> reloc_sections
;
1419 // Keep track of .eh_frame sections.
1420 std::vector
<unsigned int> eh_frame_sections
;
1422 // Keep track of .debug_info and .debug_types sections.
1423 std::vector
<unsigned int> debug_info_sections
;
1424 std::vector
<unsigned int> debug_types_sections
;
1426 // Skip the first, dummy, section.
1427 pshdrs
= shdrs
+ This::shdr_size
;
1428 for (unsigned int i
= 1; i
< shnum
; ++i
, pshdrs
+= This::shdr_size
)
1430 typename
This::Shdr
shdr(pshdrs
);
1432 if (shdr
.get_sh_name() >= section_names_size
)
1434 this->error(_("bad section name offset for section %u: %lu"),
1435 i
, static_cast<unsigned long>(shdr
.get_sh_name()));
1439 const char* name
= pnames
+ shdr
.get_sh_name();
1443 if (this->handle_gnu_warning_section(name
, i
, symtab
))
1445 if (!relocatable
&& !parameters
->options().shared())
1449 // The .note.GNU-stack section is special. It gives the
1450 // protection flags that this object file requires for the stack
1452 if (strcmp(name
, ".note.GNU-stack") == 0)
1454 seen_gnu_stack
= true;
1455 gnu_stack_flags
|= shdr
.get_sh_flags();
1459 // The .note.GNU-split-stack section is also special. It
1460 // indicates that the object was compiled with
1462 if (this->handle_split_stack_section(name
))
1464 if (!relocatable
&& !parameters
->options().shared())
1468 // Skip attributes section.
1469 if (parameters
->target().is_attributes_section(name
))
1474 bool discard
= omit
[i
];
1477 if (shdr
.get_sh_type() == elfcpp::SHT_GROUP
)
1479 if (!this->include_section_group(symtab
, layout
, i
, name
,
1485 else if ((shdr
.get_sh_flags() & elfcpp::SHF_GROUP
) == 0
1486 && Layout::is_linkonce(name
))
1488 if (!this->include_linkonce_section(layout
, i
, name
, shdr
))
1493 // Add the section to the incremental inputs layout.
1494 Incremental_inputs
* incremental_inputs
= layout
->incremental_inputs();
1495 if (incremental_inputs
!= NULL
1497 && can_incremental_update(shdr
.get_sh_type()))
1499 off_t sh_size
= shdr
.get_sh_size();
1500 section_size_type uncompressed_size
;
1501 if (this->section_is_compressed(i
, &uncompressed_size
))
1502 sh_size
= uncompressed_size
;
1503 incremental_inputs
->report_input_section(this, i
, name
, sh_size
);
1508 // Do not include this section in the link.
1509 out_sections
[i
] = NULL
;
1510 out_section_offsets
[i
] = invalid_address
;
1515 if (is_pass_one
&& parameters
->options().gc_sections())
1517 if (this->is_section_name_included(name
)
1518 || layout
->keep_input_section (this, name
)
1519 || shdr
.get_sh_type() == elfcpp::SHT_INIT_ARRAY
1520 || shdr
.get_sh_type() == elfcpp::SHT_FINI_ARRAY
)
1522 symtab
->gc()->worklist().push(Section_id(this, i
));
1524 // If the section name XXX can be represented as a C identifier
1525 // it cannot be discarded if there are references to
1526 // __start_XXX and __stop_XXX symbols. These need to be
1527 // specially handled.
1528 if (is_cident(name
))
1530 symtab
->gc()->add_cident_section(name
, Section_id(this, i
));
1534 // When doing a relocatable link we are going to copy input
1535 // reloc sections into the output. We only want to copy the
1536 // ones associated with sections which are not being discarded.
1537 // However, we don't know that yet for all sections. So save
1538 // reloc sections and process them later. Garbage collection is
1539 // not triggered when relocatable code is desired.
1541 && (shdr
.get_sh_type() == elfcpp::SHT_REL
1542 || shdr
.get_sh_type() == elfcpp::SHT_RELA
))
1544 reloc_sections
.push_back(i
);
1548 if (relocatable
&& shdr
.get_sh_type() == elfcpp::SHT_GROUP
)
1551 // The .eh_frame section is special. It holds exception frame
1552 // information that we need to read in order to generate the
1553 // exception frame header. We process these after all the other
1554 // sections so that the exception frame reader can reliably
1555 // determine which sections are being discarded, and discard the
1556 // corresponding information.
1558 && strcmp(name
, ".eh_frame") == 0
1559 && this->check_eh_frame_flags(&shdr
))
1563 out_sections
[i
] = reinterpret_cast<Output_section
*>(1);
1564 out_section_offsets
[i
] = invalid_address
;
1566 else if (should_defer_layout
)
1567 this->deferred_layout_
.push_back(Deferred_layout(i
, name
,
1572 eh_frame_sections
.push_back(i
);
1576 if (is_pass_two
&& parameters
->options().gc_sections())
1578 // This is executed during the second pass of garbage
1579 // collection. do_layout has been called before and some
1580 // sections have been already discarded. Simply ignore
1581 // such sections this time around.
1582 if (out_sections
[i
] == NULL
)
1584 gold_assert(out_section_offsets
[i
] == invalid_address
);
1587 if (((shdr
.get_sh_flags() & elfcpp::SHF_ALLOC
) != 0)
1588 && symtab
->gc()->is_section_garbage(this, i
))
1590 if (parameters
->options().print_gc_sections())
1591 gold_info(_("%s: removing unused section from '%s'"
1593 program_name
, this->section_name(i
).c_str(),
1594 this->name().c_str());
1595 out_sections
[i
] = NULL
;
1596 out_section_offsets
[i
] = invalid_address
;
1601 if (is_pass_two
&& parameters
->options().icf_enabled())
1603 if (out_sections
[i
] == NULL
)
1605 gold_assert(out_section_offsets
[i
] == invalid_address
);
1608 if (((shdr
.get_sh_flags() & elfcpp::SHF_ALLOC
) != 0)
1609 && symtab
->icf()->is_section_folded(this, i
))
1611 if (parameters
->options().print_icf_sections())
1614 symtab
->icf()->get_folded_section(this, i
);
1615 Relobj
* folded_obj
=
1616 reinterpret_cast<Relobj
*>(folded
.first
);
1617 gold_info(_("%s: ICF folding section '%s' in file '%s'"
1618 "into '%s' in file '%s'"),
1619 program_name
, this->section_name(i
).c_str(),
1620 this->name().c_str(),
1621 folded_obj
->section_name(folded
.second
).c_str(),
1622 folded_obj
->name().c_str());
1624 out_sections
[i
] = NULL
;
1625 out_section_offsets
[i
] = invalid_address
;
1630 // Defer layout here if input files are claimed by plugins. When gc
1631 // is turned on this function is called twice. For the second call
1632 // should_defer_layout should be false.
1633 if (should_defer_layout
&& (shdr
.get_sh_flags() & elfcpp::SHF_ALLOC
))
1635 gold_assert(!is_pass_two
);
1636 this->deferred_layout_
.push_back(Deferred_layout(i
, name
,
1640 // Put dummy values here; real values will be supplied by
1641 // do_layout_deferred_sections.
1642 out_sections
[i
] = reinterpret_cast<Output_section
*>(2);
1643 out_section_offsets
[i
] = invalid_address
;
1647 // During gc_pass_two if a section that was previously deferred is
1648 // found, do not layout the section as layout_deferred_sections will
1649 // do it later from gold.cc.
1651 && (out_sections
[i
] == reinterpret_cast<Output_section
*>(2)))
1656 // This is during garbage collection. The out_sections are
1657 // assigned in the second call to this function.
1658 out_sections
[i
] = reinterpret_cast<Output_section
*>(1);
1659 out_section_offsets
[i
] = invalid_address
;
1663 // When garbage collection is switched on the actual layout
1664 // only happens in the second call.
1665 this->layout_section(layout
, i
, name
, shdr
, reloc_shndx
[i
],
1668 // When generating a .gdb_index section, we do additional
1669 // processing of .debug_info and .debug_types sections after all
1670 // the other sections for the same reason as above.
1672 && parameters
->options().gdb_index()
1673 && !(shdr
.get_sh_flags() & elfcpp::SHF_ALLOC
))
1675 if (strcmp(name
, ".debug_info") == 0
1676 || strcmp(name
, ".zdebug_info") == 0)
1677 debug_info_sections
.push_back(i
);
1678 else if (strcmp(name
, ".debug_types") == 0
1679 || strcmp(name
, ".zdebug_types") == 0)
1680 debug_types_sections
.push_back(i
);
1686 layout
->layout_gnu_stack(seen_gnu_stack
, gnu_stack_flags
, this);
1688 // When doing a relocatable link handle the reloc sections at the
1689 // end. Garbage collection and Identical Code Folding is not
1690 // turned on for relocatable code.
1692 this->size_relocatable_relocs();
1694 gold_assert(!is_two_pass
|| reloc_sections
.empty());
1696 for (std::vector
<unsigned int>::const_iterator p
= reloc_sections
.begin();
1697 p
!= reloc_sections
.end();
1700 unsigned int i
= *p
;
1701 const unsigned char* pshdr
;
1702 pshdr
= section_headers_data
+ i
* This::shdr_size
;
1703 typename
This::Shdr
shdr(pshdr
);
1705 unsigned int data_shndx
= this->adjust_shndx(shdr
.get_sh_info());
1706 if (data_shndx
>= shnum
)
1708 // We already warned about this above.
1712 Output_section
* data_section
= out_sections
[data_shndx
];
1713 if (data_section
== reinterpret_cast<Output_section
*>(2))
1715 // The layout for the data section was deferred, so we need
1716 // to defer the relocation section, too.
1717 const char* name
= pnames
+ shdr
.get_sh_name();
1718 this->deferred_layout_relocs_
.push_back(
1719 Deferred_layout(i
, name
, pshdr
, 0, elfcpp::SHT_NULL
));
1720 out_sections
[i
] = reinterpret_cast<Output_section
*>(2);
1721 out_section_offsets
[i
] = invalid_address
;
1724 if (data_section
== NULL
)
1726 out_sections
[i
] = NULL
;
1727 out_section_offsets
[i
] = invalid_address
;
1731 Relocatable_relocs
* rr
= new Relocatable_relocs();
1732 this->set_relocatable_relocs(i
, rr
);
1734 Output_section
* os
= layout
->layout_reloc(this, i
, shdr
, data_section
,
1736 out_sections
[i
] = os
;
1737 out_section_offsets
[i
] = invalid_address
;
1740 // Handle the .eh_frame sections at the end.
1741 gold_assert(!is_pass_one
|| eh_frame_sections
.empty());
1742 for (std::vector
<unsigned int>::const_iterator p
= eh_frame_sections
.begin();
1743 p
!= eh_frame_sections
.end();
1746 unsigned int i
= *p
;
1747 const unsigned char* pshdr
;
1748 pshdr
= section_headers_data
+ i
* This::shdr_size
;
1749 typename
This::Shdr
shdr(pshdr
);
1751 this->layout_eh_frame_section(layout
,
1762 // When building a .gdb_index section, scan the .debug_info and
1763 // .debug_types sections.
1764 gold_assert(!is_pass_one
1765 || (debug_info_sections
.empty() && debug_types_sections
.empty()));
1766 for (std::vector
<unsigned int>::const_iterator p
1767 = debug_info_sections
.begin();
1768 p
!= debug_info_sections
.end();
1771 unsigned int i
= *p
;
1772 layout
->add_to_gdb_index(false, this, symbols_data
, symbols_size
,
1773 i
, reloc_shndx
[i
], reloc_type
[i
]);
1775 for (std::vector
<unsigned int>::const_iterator p
1776 = debug_types_sections
.begin();
1777 p
!= debug_types_sections
.end();
1780 unsigned int i
= *p
;
1781 layout
->add_to_gdb_index(true, this, symbols_data
, symbols_size
,
1782 i
, reloc_shndx
[i
], reloc_type
[i
]);
1787 delete[] gc_sd
->section_headers_data
;
1788 delete[] gc_sd
->section_names_data
;
1789 delete[] gc_sd
->symbols_data
;
1790 delete[] gc_sd
->symbol_names_data
;
1791 this->set_symbols_data(NULL
);
1795 delete sd
->section_headers
;
1796 sd
->section_headers
= NULL
;
1797 delete sd
->section_names
;
1798 sd
->section_names
= NULL
;
1802 // Layout sections whose layout was deferred while waiting for
1803 // input files from a plugin.
1805 template<int size
, bool big_endian
>
1807 Sized_relobj_file
<size
, big_endian
>::do_layout_deferred_sections(Layout
* layout
)
1809 typename
std::vector
<Deferred_layout
>::iterator deferred
;
1811 for (deferred
= this->deferred_layout_
.begin();
1812 deferred
!= this->deferred_layout_
.end();
1815 typename
This::Shdr
shdr(deferred
->shdr_data_
);
1816 // If the section is not included, it is because the garbage collector
1817 // decided it is not needed. Avoid reverting that decision.
1818 if (!this->is_section_included(deferred
->shndx_
))
1821 if (parameters
->options().relocatable()
1822 || deferred
->name_
!= ".eh_frame"
1823 || !this->check_eh_frame_flags(&shdr
))
1824 this->layout_section(layout
, deferred
->shndx_
, deferred
->name_
.c_str(),
1825 shdr
, deferred
->reloc_shndx_
,
1826 deferred
->reloc_type_
);
1829 // Reading the symbols again here may be slow.
1830 Read_symbols_data sd
;
1831 this->read_symbols(&sd
);
1832 this->layout_eh_frame_section(layout
,
1835 sd
.symbol_names
->data(),
1836 sd
.symbol_names_size
,
1839 deferred
->reloc_shndx_
,
1840 deferred
->reloc_type_
);
1844 this->deferred_layout_
.clear();
1846 // Now handle the deferred relocation sections.
1848 Output_sections
& out_sections(this->output_sections());
1849 std::vector
<Address
>& out_section_offsets(this->section_offsets());
1851 for (deferred
= this->deferred_layout_relocs_
.begin();
1852 deferred
!= this->deferred_layout_relocs_
.end();
1855 unsigned int shndx
= deferred
->shndx_
;
1856 typename
This::Shdr
shdr(deferred
->shdr_data_
);
1857 unsigned int data_shndx
= this->adjust_shndx(shdr
.get_sh_info());
1859 Output_section
* data_section
= out_sections
[data_shndx
];
1860 if (data_section
== NULL
)
1862 out_sections
[shndx
] = NULL
;
1863 out_section_offsets
[shndx
] = invalid_address
;
1867 Relocatable_relocs
* rr
= new Relocatable_relocs();
1868 this->set_relocatable_relocs(shndx
, rr
);
1870 Output_section
* os
= layout
->layout_reloc(this, shndx
, shdr
,
1872 out_sections
[shndx
] = os
;
1873 out_section_offsets
[shndx
] = invalid_address
;
1877 // Add the symbols to the symbol table.
1879 template<int size
, bool big_endian
>
1881 Sized_relobj_file
<size
, big_endian
>::do_add_symbols(Symbol_table
* symtab
,
1882 Read_symbols_data
* sd
,
1885 if (sd
->symbols
== NULL
)
1887 gold_assert(sd
->symbol_names
== NULL
);
1891 const int sym_size
= This::sym_size
;
1892 size_t symcount
= ((sd
->symbols_size
- sd
->external_symbols_offset
)
1894 if (symcount
* sym_size
!= sd
->symbols_size
- sd
->external_symbols_offset
)
1896 this->error(_("size of symbols is not multiple of symbol size"));
1900 this->symbols_
.resize(symcount
);
1902 const char* sym_names
=
1903 reinterpret_cast<const char*>(sd
->symbol_names
->data());
1904 symtab
->add_from_relobj(this,
1905 sd
->symbols
->data() + sd
->external_symbols_offset
,
1906 symcount
, this->local_symbol_count_
,
1907 sym_names
, sd
->symbol_names_size
,
1909 &this->defined_count_
);
1913 delete sd
->symbol_names
;
1914 sd
->symbol_names
= NULL
;
1917 // Find out if this object, that is a member of a lib group, should be included
1918 // in the link. We check every symbol defined by this object. If the symbol
1919 // table has a strong undefined reference to that symbol, we have to include
1922 template<int size
, bool big_endian
>
1923 Archive::Should_include
1924 Sized_relobj_file
<size
, big_endian
>::do_should_include_member(
1925 Symbol_table
* symtab
,
1927 Read_symbols_data
* sd
,
1930 char* tmpbuf
= NULL
;
1931 size_t tmpbuflen
= 0;
1932 const char* sym_names
=
1933 reinterpret_cast<const char*>(sd
->symbol_names
->data());
1934 const unsigned char* syms
=
1935 sd
->symbols
->data() + sd
->external_symbols_offset
;
1936 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
1937 size_t symcount
= ((sd
->symbols_size
- sd
->external_symbols_offset
)
1940 const unsigned char* p
= syms
;
1942 for (size_t i
= 0; i
< symcount
; ++i
, p
+= sym_size
)
1944 elfcpp::Sym
<size
, big_endian
> sym(p
);
1945 unsigned int st_shndx
= sym
.get_st_shndx();
1946 if (st_shndx
== elfcpp::SHN_UNDEF
)
1949 unsigned int st_name
= sym
.get_st_name();
1950 const char* name
= sym_names
+ st_name
;
1952 Archive::Should_include t
= Archive::should_include_member(symtab
,
1958 if (t
== Archive::SHOULD_INCLUDE_YES
)
1967 return Archive::SHOULD_INCLUDE_UNKNOWN
;
1970 // Iterate over global defined symbols, calling a visitor class V for each.
1972 template<int size
, bool big_endian
>
1974 Sized_relobj_file
<size
, big_endian
>::do_for_all_global_symbols(
1975 Read_symbols_data
* sd
,
1976 Library_base::Symbol_visitor_base
* v
)
1978 const char* sym_names
=
1979 reinterpret_cast<const char*>(sd
->symbol_names
->data());
1980 const unsigned char* syms
=
1981 sd
->symbols
->data() + sd
->external_symbols_offset
;
1982 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
1983 size_t symcount
= ((sd
->symbols_size
- sd
->external_symbols_offset
)
1985 const unsigned char* p
= syms
;
1987 for (size_t i
= 0; i
< symcount
; ++i
, p
+= sym_size
)
1989 elfcpp::Sym
<size
, big_endian
> sym(p
);
1990 if (sym
.get_st_shndx() != elfcpp::SHN_UNDEF
)
1991 v
->visit(sym_names
+ sym
.get_st_name());
1995 // Return whether the local symbol SYMNDX has a PLT offset.
1997 template<int size
, bool big_endian
>
1999 Sized_relobj_file
<size
, big_endian
>::local_has_plt_offset(
2000 unsigned int symndx
) const
2002 typename
Local_plt_offsets::const_iterator p
=
2003 this->local_plt_offsets_
.find(symndx
);
2004 return p
!= this->local_plt_offsets_
.end();
2007 // Get the PLT offset of a local symbol.
2009 template<int size
, bool big_endian
>
2011 Sized_relobj_file
<size
, big_endian
>::do_local_plt_offset(
2012 unsigned int symndx
) const
2014 typename
Local_plt_offsets::const_iterator p
=
2015 this->local_plt_offsets_
.find(symndx
);
2016 gold_assert(p
!= this->local_plt_offsets_
.end());
2020 // Set the PLT offset of a local symbol.
2022 template<int size
, bool big_endian
>
2024 Sized_relobj_file
<size
, big_endian
>::set_local_plt_offset(
2025 unsigned int symndx
, unsigned int plt_offset
)
2027 std::pair
<typename
Local_plt_offsets::iterator
, bool> ins
=
2028 this->local_plt_offsets_
.insert(std::make_pair(symndx
, plt_offset
));
2029 gold_assert(ins
.second
);
2032 // First pass over the local symbols. Here we add their names to
2033 // *POOL and *DYNPOOL, and we store the symbol value in
2034 // THIS->LOCAL_VALUES_. This function is always called from a
2035 // singleton thread. This is followed by a call to
2036 // finalize_local_symbols.
2038 template<int size
, bool big_endian
>
2040 Sized_relobj_file
<size
, big_endian
>::do_count_local_symbols(Stringpool
* pool
,
2041 Stringpool
* dynpool
)
2043 gold_assert(this->symtab_shndx_
!= -1U);
2044 if (this->symtab_shndx_
== 0)
2046 // This object has no symbols. Weird but legal.
2050 // Read the symbol table section header.
2051 const unsigned int symtab_shndx
= this->symtab_shndx_
;
2052 typename
This::Shdr
symtabshdr(this,
2053 this->elf_file_
.section_header(symtab_shndx
));
2054 gold_assert(symtabshdr
.get_sh_type() == elfcpp::SHT_SYMTAB
);
2056 // Read the local symbols.
2057 const int sym_size
= This::sym_size
;
2058 const unsigned int loccount
= this->local_symbol_count_
;
2059 gold_assert(loccount
== symtabshdr
.get_sh_info());
2060 off_t locsize
= loccount
* sym_size
;
2061 const unsigned char* psyms
= this->get_view(symtabshdr
.get_sh_offset(),
2062 locsize
, true, true);
2064 // Read the symbol names.
2065 const unsigned int strtab_shndx
=
2066 this->adjust_shndx(symtabshdr
.get_sh_link());
2067 section_size_type strtab_size
;
2068 const unsigned char* pnamesu
= this->section_contents(strtab_shndx
,
2071 const char* pnames
= reinterpret_cast<const char*>(pnamesu
);
2073 // Loop over the local symbols.
2075 const Output_sections
& out_sections(this->output_sections());
2076 unsigned int shnum
= this->shnum();
2077 unsigned int count
= 0;
2078 unsigned int dyncount
= 0;
2079 // Skip the first, dummy, symbol.
2081 bool strip_all
= parameters
->options().strip_all();
2082 bool discard_all
= parameters
->options().discard_all();
2083 bool discard_locals
= parameters
->options().discard_locals();
2084 for (unsigned int i
= 1; i
< loccount
; ++i
, psyms
+= sym_size
)
2086 elfcpp::Sym
<size
, big_endian
> sym(psyms
);
2088 Symbol_value
<size
>& lv(this->local_values_
[i
]);
2091 unsigned int shndx
= this->adjust_sym_shndx(i
, sym
.get_st_shndx(),
2093 lv
.set_input_shndx(shndx
, is_ordinary
);
2095 if (sym
.get_st_type() == elfcpp::STT_SECTION
)
2096 lv
.set_is_section_symbol();
2097 else if (sym
.get_st_type() == elfcpp::STT_TLS
)
2098 lv
.set_is_tls_symbol();
2099 else if (sym
.get_st_type() == elfcpp::STT_GNU_IFUNC
)
2100 lv
.set_is_ifunc_symbol();
2102 // Save the input symbol value for use in do_finalize_local_symbols().
2103 lv
.set_input_value(sym
.get_st_value());
2105 // Decide whether this symbol should go into the output file.
2107 if ((shndx
< shnum
&& out_sections
[shndx
] == NULL
)
2108 || shndx
== this->discarded_eh_frame_shndx_
)
2110 lv
.set_no_output_symtab_entry();
2111 gold_assert(!lv
.needs_output_dynsym_entry());
2115 if (sym
.get_st_type() == elfcpp::STT_SECTION
2116 || !this->adjust_local_symbol(&lv
))
2118 lv
.set_no_output_symtab_entry();
2119 gold_assert(!lv
.needs_output_dynsym_entry());
2123 if (sym
.get_st_name() >= strtab_size
)
2125 this->error(_("local symbol %u section name out of range: %u >= %u"),
2126 i
, sym
.get_st_name(),
2127 static_cast<unsigned int>(strtab_size
));
2128 lv
.set_no_output_symtab_entry();
2132 const char* name
= pnames
+ sym
.get_st_name();
2134 // If needed, add the symbol to the dynamic symbol table string pool.
2135 if (lv
.needs_output_dynsym_entry())
2137 dynpool
->add(name
, true, NULL
);
2142 || (discard_all
&& lv
.may_be_discarded_from_output_symtab()))
2144 lv
.set_no_output_symtab_entry();
2148 // If --discard-locals option is used, discard all temporary local
2149 // symbols. These symbols start with system-specific local label
2150 // prefixes, typically .L for ELF system. We want to be compatible
2151 // with GNU ld so here we essentially use the same check in
2152 // bfd_is_local_label(). The code is different because we already
2155 // - the symbol is local and thus cannot have global or weak binding.
2156 // - the symbol is not a section symbol.
2157 // - the symbol has a name.
2159 // We do not discard a symbol if it needs a dynamic symbol entry.
2161 && sym
.get_st_type() != elfcpp::STT_FILE
2162 && !lv
.needs_output_dynsym_entry()
2163 && lv
.may_be_discarded_from_output_symtab()
2164 && parameters
->target().is_local_label_name(name
))
2166 lv
.set_no_output_symtab_entry();
2170 // Discard the local symbol if -retain_symbols_file is specified
2171 // and the local symbol is not in that file.
2172 if (!parameters
->options().should_retain_symbol(name
))
2174 lv
.set_no_output_symtab_entry();
2178 // Add the symbol to the symbol table string pool.
2179 pool
->add(name
, true, NULL
);
2183 this->output_local_symbol_count_
= count
;
2184 this->output_local_dynsym_count_
= dyncount
;
2187 // Compute the final value of a local symbol.
2189 template<int size
, bool big_endian
>
2190 typename Sized_relobj_file
<size
, big_endian
>::Compute_final_local_value_status
2191 Sized_relobj_file
<size
, big_endian
>::compute_final_local_value_internal(
2193 const Symbol_value
<size
>* lv_in
,
2194 Symbol_value
<size
>* lv_out
,
2196 const Output_sections
& out_sections
,
2197 const std::vector
<Address
>& out_offsets
,
2198 const Symbol_table
* symtab
)
2200 // We are going to overwrite *LV_OUT, if it has a merged symbol value,
2201 // we may have a memory leak.
2202 gold_assert(lv_out
->has_output_value());
2205 unsigned int shndx
= lv_in
->input_shndx(&is_ordinary
);
2207 // Set the output symbol value.
2211 if (shndx
== elfcpp::SHN_ABS
|| Symbol::is_common_shndx(shndx
))
2212 lv_out
->set_output_value(lv_in
->input_value());
2215 this->error(_("unknown section index %u for local symbol %u"),
2217 lv_out
->set_output_value(0);
2218 return This::CFLV_ERROR
;
2223 if (shndx
>= this->shnum())
2225 this->error(_("local symbol %u section index %u out of range"),
2227 lv_out
->set_output_value(0);
2228 return This::CFLV_ERROR
;
2231 Output_section
* os
= out_sections
[shndx
];
2232 Address secoffset
= out_offsets
[shndx
];
2233 if (symtab
->is_section_folded(this, shndx
))
2235 gold_assert(os
== NULL
&& secoffset
== invalid_address
);
2236 // Get the os of the section it is folded onto.
2237 Section_id folded
= symtab
->icf()->get_folded_section(this,
2239 gold_assert(folded
.first
!= NULL
);
2240 Sized_relobj_file
<size
, big_endian
>* folded_obj
= reinterpret_cast
2241 <Sized_relobj_file
<size
, big_endian
>*>(folded
.first
);
2242 os
= folded_obj
->output_section(folded
.second
);
2243 gold_assert(os
!= NULL
);
2244 secoffset
= folded_obj
->get_output_section_offset(folded
.second
);
2246 // This could be a relaxed input section.
2247 if (secoffset
== invalid_address
)
2249 const Output_relaxed_input_section
* relaxed_section
=
2250 os
->find_relaxed_input_section(folded_obj
, folded
.second
);
2251 gold_assert(relaxed_section
!= NULL
);
2252 secoffset
= relaxed_section
->address() - os
->address();
2258 // This local symbol belongs to a section we are discarding.
2259 // In some cases when applying relocations later, we will
2260 // attempt to match it to the corresponding kept section,
2261 // so we leave the input value unchanged here.
2262 return This::CFLV_DISCARDED
;
2264 else if (secoffset
== invalid_address
)
2268 // This is a SHF_MERGE section or one which otherwise
2269 // requires special handling.
2270 if (shndx
== this->discarded_eh_frame_shndx_
)
2272 // This local symbol belongs to a discarded .eh_frame
2273 // section. Just treat it like the case in which
2274 // os == NULL above.
2275 gold_assert(this->has_eh_frame_
);
2276 return This::CFLV_DISCARDED
;
2278 else if (!lv_in
->is_section_symbol())
2280 // This is not a section symbol. We can determine
2281 // the final value now.
2282 lv_out
->set_output_value(
2283 os
->output_address(this, shndx
, lv_in
->input_value()));
2285 else if (!os
->find_starting_output_address(this, shndx
, &start
))
2287 // This is a section symbol, but apparently not one in a
2288 // merged section. First check to see if this is a relaxed
2289 // input section. If so, use its address. Otherwise just
2290 // use the start of the output section. This happens with
2291 // relocatable links when the input object has section
2292 // symbols for arbitrary non-merge sections.
2293 const Output_section_data
* posd
=
2294 os
->find_relaxed_input_section(this, shndx
);
2297 Address relocatable_link_adjustment
=
2298 relocatable
? os
->address() : 0;
2299 lv_out
->set_output_value(posd
->address()
2300 - relocatable_link_adjustment
);
2303 lv_out
->set_output_value(os
->address());
2307 // We have to consider the addend to determine the
2308 // value to use in a relocation. START is the start
2309 // of this input section. If we are doing a relocatable
2310 // link, use offset from start output section instead of
2312 Address adjusted_start
=
2313 relocatable
? start
- os
->address() : start
;
2314 Merged_symbol_value
<size
>* msv
=
2315 new Merged_symbol_value
<size
>(lv_in
->input_value(),
2317 lv_out
->set_merged_symbol_value(msv
);
2320 else if (lv_in
->is_tls_symbol())
2321 lv_out
->set_output_value(os
->tls_offset()
2323 + lv_in
->input_value());
2325 lv_out
->set_output_value((relocatable
? 0 : os
->address())
2327 + lv_in
->input_value());
2329 return This::CFLV_OK
;
2332 // Compute final local symbol value. R_SYM is the index of a local
2333 // symbol in symbol table. LV points to a symbol value, which is
2334 // expected to hold the input value and to be over-written by the
2335 // final value. SYMTAB points to a symbol table. Some targets may want
2336 // to know would-be-finalized local symbol values in relaxation.
2337 // Hence we provide this method. Since this method updates *LV, a
2338 // callee should make a copy of the original local symbol value and
2339 // use the copy instead of modifying an object's local symbols before
2340 // everything is finalized. The caller should also free up any allocated
2341 // memory in the return value in *LV.
2342 template<int size
, bool big_endian
>
2343 typename Sized_relobj_file
<size
, big_endian
>::Compute_final_local_value_status
2344 Sized_relobj_file
<size
, big_endian
>::compute_final_local_value(
2346 const Symbol_value
<size
>* lv_in
,
2347 Symbol_value
<size
>* lv_out
,
2348 const Symbol_table
* symtab
)
2350 // This is just a wrapper of compute_final_local_value_internal.
2351 const bool relocatable
= parameters
->options().relocatable();
2352 const Output_sections
& out_sections(this->output_sections());
2353 const std::vector
<Address
>& out_offsets(this->section_offsets());
2354 return this->compute_final_local_value_internal(r_sym
, lv_in
, lv_out
,
2355 relocatable
, out_sections
,
2356 out_offsets
, symtab
);
2359 // Finalize the local symbols. Here we set the final value in
2360 // THIS->LOCAL_VALUES_ and set their output symbol table indexes.
2361 // This function is always called from a singleton thread. The actual
2362 // output of the local symbols will occur in a separate task.
2364 template<int size
, bool big_endian
>
2366 Sized_relobj_file
<size
, big_endian
>::do_finalize_local_symbols(
2369 Symbol_table
* symtab
)
2371 gold_assert(off
== static_cast<off_t
>(align_address(off
, size
>> 3)));
2373 const unsigned int loccount
= this->local_symbol_count_
;
2374 this->local_symbol_offset_
= off
;
2376 const bool relocatable
= parameters
->options().relocatable();
2377 const Output_sections
& out_sections(this->output_sections());
2378 const std::vector
<Address
>& out_offsets(this->section_offsets());
2380 for (unsigned int i
= 1; i
< loccount
; ++i
)
2382 Symbol_value
<size
>* lv
= &this->local_values_
[i
];
2384 Compute_final_local_value_status cflv_status
=
2385 this->compute_final_local_value_internal(i
, lv
, lv
, relocatable
,
2386 out_sections
, out_offsets
,
2388 switch (cflv_status
)
2391 if (!lv
->is_output_symtab_index_set())
2393 lv
->set_output_symtab_index(index
);
2397 case CFLV_DISCARDED
:
2408 // Set the output dynamic symbol table indexes for the local variables.
2410 template<int size
, bool big_endian
>
2412 Sized_relobj_file
<size
, big_endian
>::do_set_local_dynsym_indexes(
2415 const unsigned int loccount
= this->local_symbol_count_
;
2416 for (unsigned int i
= 1; i
< loccount
; ++i
)
2418 Symbol_value
<size
>& lv(this->local_values_
[i
]);
2419 if (lv
.needs_output_dynsym_entry())
2421 lv
.set_output_dynsym_index(index
);
2428 // Set the offset where local dynamic symbol information will be stored.
2429 // Returns the count of local symbols contributed to the symbol table by
2432 template<int size
, bool big_endian
>
2434 Sized_relobj_file
<size
, big_endian
>::do_set_local_dynsym_offset(off_t off
)
2436 gold_assert(off
== static_cast<off_t
>(align_address(off
, size
>> 3)));
2437 this->local_dynsym_offset_
= off
;
2438 return this->output_local_dynsym_count_
;
2441 // If Symbols_data is not NULL get the section flags from here otherwise
2442 // get it from the file.
2444 template<int size
, bool big_endian
>
2446 Sized_relobj_file
<size
, big_endian
>::do_section_flags(unsigned int shndx
)
2448 Symbols_data
* sd
= this->get_symbols_data();
2451 const unsigned char* pshdrs
= sd
->section_headers_data
2452 + This::shdr_size
* shndx
;
2453 typename
This::Shdr
shdr(pshdrs
);
2454 return shdr
.get_sh_flags();
2456 // If sd is NULL, read the section header from the file.
2457 return this->elf_file_
.section_flags(shndx
);
2460 // Get the section's ent size from Symbols_data. Called by get_section_contents
2463 template<int size
, bool big_endian
>
2465 Sized_relobj_file
<size
, big_endian
>::do_section_entsize(unsigned int shndx
)
2467 Symbols_data
* sd
= this->get_symbols_data();
2468 gold_assert(sd
!= NULL
);
2470 const unsigned char* pshdrs
= sd
->section_headers_data
2471 + This::shdr_size
* shndx
;
2472 typename
This::Shdr
shdr(pshdrs
);
2473 return shdr
.get_sh_entsize();
2476 // Write out the local symbols.
2478 template<int size
, bool big_endian
>
2480 Sized_relobj_file
<size
, big_endian
>::write_local_symbols(
2482 const Stringpool
* sympool
,
2483 const Stringpool
* dynpool
,
2484 Output_symtab_xindex
* symtab_xindex
,
2485 Output_symtab_xindex
* dynsym_xindex
,
2488 const bool strip_all
= parameters
->options().strip_all();
2491 if (this->output_local_dynsym_count_
== 0)
2493 this->output_local_symbol_count_
= 0;
2496 gold_assert(this->symtab_shndx_
!= -1U);
2497 if (this->symtab_shndx_
== 0)
2499 // This object has no symbols. Weird but legal.
2503 // Read the symbol table section header.
2504 const unsigned int symtab_shndx
= this->symtab_shndx_
;
2505 typename
This::Shdr
symtabshdr(this,
2506 this->elf_file_
.section_header(symtab_shndx
));
2507 gold_assert(symtabshdr
.get_sh_type() == elfcpp::SHT_SYMTAB
);
2508 const unsigned int loccount
= this->local_symbol_count_
;
2509 gold_assert(loccount
== symtabshdr
.get_sh_info());
2511 // Read the local symbols.
2512 const int sym_size
= This::sym_size
;
2513 off_t locsize
= loccount
* sym_size
;
2514 const unsigned char* psyms
= this->get_view(symtabshdr
.get_sh_offset(),
2515 locsize
, true, false);
2517 // Read the symbol names.
2518 const unsigned int strtab_shndx
=
2519 this->adjust_shndx(symtabshdr
.get_sh_link());
2520 section_size_type strtab_size
;
2521 const unsigned char* pnamesu
= this->section_contents(strtab_shndx
,
2524 const char* pnames
= reinterpret_cast<const char*>(pnamesu
);
2526 // Get views into the output file for the portions of the symbol table
2527 // and the dynamic symbol table that we will be writing.
2528 off_t output_size
= this->output_local_symbol_count_
* sym_size
;
2529 unsigned char* oview
= NULL
;
2530 if (output_size
> 0)
2531 oview
= of
->get_output_view(symtab_off
+ this->local_symbol_offset_
,
2534 off_t dyn_output_size
= this->output_local_dynsym_count_
* sym_size
;
2535 unsigned char* dyn_oview
= NULL
;
2536 if (dyn_output_size
> 0)
2537 dyn_oview
= of
->get_output_view(this->local_dynsym_offset_
,
2540 const Output_sections
out_sections(this->output_sections());
2542 gold_assert(this->local_values_
.size() == loccount
);
2544 unsigned char* ov
= oview
;
2545 unsigned char* dyn_ov
= dyn_oview
;
2547 for (unsigned int i
= 1; i
< loccount
; ++i
, psyms
+= sym_size
)
2549 elfcpp::Sym
<size
, big_endian
> isym(psyms
);
2551 Symbol_value
<size
>& lv(this->local_values_
[i
]);
2554 unsigned int st_shndx
= this->adjust_sym_shndx(i
, isym
.get_st_shndx(),
2558 gold_assert(st_shndx
< out_sections
.size());
2559 if (out_sections
[st_shndx
] == NULL
)
2561 st_shndx
= out_sections
[st_shndx
]->out_shndx();
2562 if (st_shndx
>= elfcpp::SHN_LORESERVE
)
2564 if (lv
.has_output_symtab_entry())
2565 symtab_xindex
->add(lv
.output_symtab_index(), st_shndx
);
2566 if (lv
.has_output_dynsym_entry())
2567 dynsym_xindex
->add(lv
.output_dynsym_index(), st_shndx
);
2568 st_shndx
= elfcpp::SHN_XINDEX
;
2572 // Write the symbol to the output symbol table.
2573 if (lv
.has_output_symtab_entry())
2575 elfcpp::Sym_write
<size
, big_endian
> osym(ov
);
2577 gold_assert(isym
.get_st_name() < strtab_size
);
2578 const char* name
= pnames
+ isym
.get_st_name();
2579 osym
.put_st_name(sympool
->get_offset(name
));
2580 osym
.put_st_value(this->local_values_
[i
].value(this, 0));
2581 osym
.put_st_size(isym
.get_st_size());
2582 osym
.put_st_info(isym
.get_st_info());
2583 osym
.put_st_other(isym
.get_st_other());
2584 osym
.put_st_shndx(st_shndx
);
2589 // Write the symbol to the output dynamic symbol table.
2590 if (lv
.has_output_dynsym_entry())
2592 gold_assert(dyn_ov
< dyn_oview
+ dyn_output_size
);
2593 elfcpp::Sym_write
<size
, big_endian
> osym(dyn_ov
);
2595 gold_assert(isym
.get_st_name() < strtab_size
);
2596 const char* name
= pnames
+ isym
.get_st_name();
2597 osym
.put_st_name(dynpool
->get_offset(name
));
2598 osym
.put_st_value(this->local_values_
[i
].value(this, 0));
2599 osym
.put_st_size(isym
.get_st_size());
2600 osym
.put_st_info(isym
.get_st_info());
2601 osym
.put_st_other(isym
.get_st_other());
2602 osym
.put_st_shndx(st_shndx
);
2609 if (output_size
> 0)
2611 gold_assert(ov
- oview
== output_size
);
2612 of
->write_output_view(symtab_off
+ this->local_symbol_offset_
,
2613 output_size
, oview
);
2616 if (dyn_output_size
> 0)
2618 gold_assert(dyn_ov
- dyn_oview
== dyn_output_size
);
2619 of
->write_output_view(this->local_dynsym_offset_
, dyn_output_size
,
2624 // Set *INFO to symbolic information about the offset OFFSET in the
2625 // section SHNDX. Return true if we found something, false if we
2628 template<int size
, bool big_endian
>
2630 Sized_relobj_file
<size
, big_endian
>::get_symbol_location_info(
2633 Symbol_location_info
* info
)
2635 if (this->symtab_shndx_
== 0)
2638 section_size_type symbols_size
;
2639 const unsigned char* symbols
= this->section_contents(this->symtab_shndx_
,
2643 unsigned int symbol_names_shndx
=
2644 this->adjust_shndx(this->section_link(this->symtab_shndx_
));
2645 section_size_type names_size
;
2646 const unsigned char* symbol_names_u
=
2647 this->section_contents(symbol_names_shndx
, &names_size
, false);
2648 const char* symbol_names
= reinterpret_cast<const char*>(symbol_names_u
);
2650 const int sym_size
= This::sym_size
;
2651 const size_t count
= symbols_size
/ sym_size
;
2653 const unsigned char* p
= symbols
;
2654 for (size_t i
= 0; i
< count
; ++i
, p
+= sym_size
)
2656 elfcpp::Sym
<size
, big_endian
> sym(p
);
2658 if (sym
.get_st_type() == elfcpp::STT_FILE
)
2660 if (sym
.get_st_name() >= names_size
)
2661 info
->source_file
= "(invalid)";
2663 info
->source_file
= symbol_names
+ sym
.get_st_name();
2668 unsigned int st_shndx
= this->adjust_sym_shndx(i
, sym
.get_st_shndx(),
2671 && st_shndx
== shndx
2672 && static_cast<off_t
>(sym
.get_st_value()) <= offset
2673 && (static_cast<off_t
>(sym
.get_st_value() + sym
.get_st_size())
2676 if (sym
.get_st_name() > names_size
)
2677 info
->enclosing_symbol_name
= "(invalid)";
2680 info
->enclosing_symbol_name
= symbol_names
+ sym
.get_st_name();
2681 if (parameters
->options().do_demangle())
2683 char* demangled_name
= cplus_demangle(
2684 info
->enclosing_symbol_name
.c_str(),
2685 DMGL_ANSI
| DMGL_PARAMS
);
2686 if (demangled_name
!= NULL
)
2688 info
->enclosing_symbol_name
.assign(demangled_name
);
2689 free(demangled_name
);
2700 // Look for a kept section corresponding to the given discarded section,
2701 // and return its output address. This is used only for relocations in
2702 // debugging sections. If we can't find the kept section, return 0.
2704 template<int size
, bool big_endian
>
2705 typename Sized_relobj_file
<size
, big_endian
>::Address
2706 Sized_relobj_file
<size
, big_endian
>::map_to_kept_section(
2710 Relobj
* kept_object
;
2711 unsigned int kept_shndx
;
2712 if (this->get_kept_comdat_section(shndx
, &kept_object
, &kept_shndx
))
2714 Sized_relobj_file
<size
, big_endian
>* kept_relobj
=
2715 static_cast<Sized_relobj_file
<size
, big_endian
>*>(kept_object
);
2716 Output_section
* os
= kept_relobj
->output_section(kept_shndx
);
2717 Address offset
= kept_relobj
->get_output_section_offset(kept_shndx
);
2718 if (os
!= NULL
&& offset
!= invalid_address
)
2721 return os
->address() + offset
;
2728 // Get symbol counts.
2730 template<int size
, bool big_endian
>
2732 Sized_relobj_file
<size
, big_endian
>::do_get_global_symbol_counts(
2733 const Symbol_table
*,
2737 *defined
= this->defined_count_
;
2739 for (typename
Symbols::const_iterator p
= this->symbols_
.begin();
2740 p
!= this->symbols_
.end();
2743 && (*p
)->source() == Symbol::FROM_OBJECT
2744 && (*p
)->object() == this
2745 && (*p
)->is_defined())
2750 // Return a view of the decompressed contents of a section. Set *PLEN
2751 // to the size. Set *IS_NEW to true if the contents need to be freed
2754 template<int size
, bool big_endian
>
2755 const unsigned char*
2756 Sized_relobj_file
<size
, big_endian
>::do_decompressed_section_contents(
2758 section_size_type
* plen
,
2761 section_size_type buffer_size
;
2762 const unsigned char* buffer
= this->do_section_contents(shndx
, &buffer_size
,
2765 if (this->compressed_sections_
== NULL
)
2767 *plen
= buffer_size
;
2772 Compressed_section_map::const_iterator p
=
2773 this->compressed_sections_
->find(shndx
);
2774 if (p
== this->compressed_sections_
->end())
2776 *plen
= buffer_size
;
2781 section_size_type uncompressed_size
= p
->second
.size
;
2782 if (p
->second
.contents
!= NULL
)
2784 *plen
= uncompressed_size
;
2786 return p
->second
.contents
;
2789 unsigned char* uncompressed_data
= new unsigned char[uncompressed_size
];
2790 if (!decompress_input_section(buffer
,
2794 this->error(_("could not decompress section %s"),
2795 this->do_section_name(shndx
).c_str());
2797 // We could cache the results in p->second.contents and store
2798 // false in *IS_NEW, but build_compressed_section_map() would
2799 // have done so if it had expected it to be profitable. If
2800 // we reach this point, we expect to need the contents only
2801 // once in this pass.
2802 *plen
= uncompressed_size
;
2804 return uncompressed_data
;
2807 // Discard any buffers of uncompressed sections. This is done
2808 // at the end of the Add_symbols task.
2810 template<int size
, bool big_endian
>
2812 Sized_relobj_file
<size
, big_endian
>::do_discard_decompressed_sections()
2814 if (this->compressed_sections_
== NULL
)
2817 for (Compressed_section_map::iterator p
= this->compressed_sections_
->begin();
2818 p
!= this->compressed_sections_
->end();
2821 if (p
->second
.contents
!= NULL
)
2823 delete[] p
->second
.contents
;
2824 p
->second
.contents
= NULL
;
2829 // Input_objects methods.
2831 // Add a regular relocatable object to the list. Return false if this
2832 // object should be ignored.
2835 Input_objects::add_object(Object
* obj
)
2837 // Print the filename if the -t/--trace option is selected.
2838 if (parameters
->options().trace())
2839 gold_info("%s", obj
->name().c_str());
2841 if (!obj
->is_dynamic())
2842 this->relobj_list_
.push_back(static_cast<Relobj
*>(obj
));
2845 // See if this is a duplicate SONAME.
2846 Dynobj
* dynobj
= static_cast<Dynobj
*>(obj
);
2847 const char* soname
= dynobj
->soname();
2849 std::pair
<Unordered_set
<std::string
>::iterator
, bool> ins
=
2850 this->sonames_
.insert(soname
);
2853 // We have already seen a dynamic object with this soname.
2857 this->dynobj_list_
.push_back(dynobj
);
2860 // Add this object to the cross-referencer if requested.
2861 if (parameters
->options().user_set_print_symbol_counts()
2862 || parameters
->options().cref())
2864 if (this->cref_
== NULL
)
2865 this->cref_
= new Cref();
2866 this->cref_
->add_object(obj
);
2872 // For each dynamic object, record whether we've seen all of its
2873 // explicit dependencies.
2876 Input_objects::check_dynamic_dependencies() const
2878 bool issued_copy_dt_needed_error
= false;
2879 for (Dynobj_list::const_iterator p
= this->dynobj_list_
.begin();
2880 p
!= this->dynobj_list_
.end();
2883 const Dynobj::Needed
& needed((*p
)->needed());
2884 bool found_all
= true;
2885 Dynobj::Needed::const_iterator pneeded
;
2886 for (pneeded
= needed
.begin(); pneeded
!= needed
.end(); ++pneeded
)
2888 if (this->sonames_
.find(*pneeded
) == this->sonames_
.end())
2894 (*p
)->set_has_unknown_needed_entries(!found_all
);
2896 // --copy-dt-needed-entries aka --add-needed is a GNU ld option
2897 // that gold does not support. However, they cause no trouble
2898 // unless there is a DT_NEEDED entry that we don't know about;
2899 // warn only in that case.
2901 && !issued_copy_dt_needed_error
2902 && (parameters
->options().copy_dt_needed_entries()
2903 || parameters
->options().add_needed()))
2905 const char* optname
;
2906 if (parameters
->options().copy_dt_needed_entries())
2907 optname
= "--copy-dt-needed-entries";
2909 optname
= "--add-needed";
2910 gold_error(_("%s is not supported but is required for %s in %s"),
2911 optname
, (*pneeded
).c_str(), (*p
)->name().c_str());
2912 issued_copy_dt_needed_error
= true;
2917 // Start processing an archive.
2920 Input_objects::archive_start(Archive
* archive
)
2922 if (parameters
->options().user_set_print_symbol_counts()
2923 || parameters
->options().cref())
2925 if (this->cref_
== NULL
)
2926 this->cref_
= new Cref();
2927 this->cref_
->add_archive_start(archive
);
2931 // Stop processing an archive.
2934 Input_objects::archive_stop(Archive
* archive
)
2936 if (parameters
->options().user_set_print_symbol_counts()
2937 || parameters
->options().cref())
2938 this->cref_
->add_archive_stop(archive
);
2941 // Print symbol counts
2944 Input_objects::print_symbol_counts(const Symbol_table
* symtab
) const
2946 if (parameters
->options().user_set_print_symbol_counts()
2947 && this->cref_
!= NULL
)
2948 this->cref_
->print_symbol_counts(symtab
);
2951 // Print a cross reference table.
2954 Input_objects::print_cref(const Symbol_table
* symtab
, FILE* f
) const
2956 if (parameters
->options().cref() && this->cref_
!= NULL
)
2957 this->cref_
->print_cref(symtab
, f
);
2960 // Relocate_info methods.
2962 // Return a string describing the location of a relocation when file
2963 // and lineno information is not available. This is only used in
2966 template<int size
, bool big_endian
>
2968 Relocate_info
<size
, big_endian
>::location(size_t, off_t offset
) const
2970 Sized_dwarf_line_info
<size
, big_endian
> line_info(this->object
);
2971 std::string ret
= line_info
.addr2line(this->data_shndx
, offset
, NULL
);
2975 ret
= this->object
->name();
2977 Symbol_location_info info
;
2978 if (this->object
->get_symbol_location_info(this->data_shndx
, offset
, &info
))
2980 if (!info
.source_file
.empty())
2983 ret
+= info
.source_file
;
2985 size_t len
= info
.enclosing_symbol_name
.length() + 100;
2986 char* buf
= new char[len
];
2987 snprintf(buf
, len
, _(":function %s"),
2988 info
.enclosing_symbol_name
.c_str());
2995 ret
+= this->object
->section_name(this->data_shndx
);
2997 snprintf(buf
, sizeof buf
, "+0x%lx)", static_cast<long>(offset
));
3002 } // End namespace gold.
3007 using namespace gold
;
3009 // Read an ELF file with the header and return the appropriate
3010 // instance of Object.
3012 template<int size
, bool big_endian
>
3014 make_elf_sized_object(const std::string
& name
, Input_file
* input_file
,
3015 off_t offset
, const elfcpp::Ehdr
<size
, big_endian
>& ehdr
,
3016 bool* punconfigured
)
3018 Target
* target
= select_target(input_file
, offset
,
3019 ehdr
.get_e_machine(), size
, big_endian
,
3020 ehdr
.get_e_ident()[elfcpp::EI_OSABI
],
3021 ehdr
.get_e_ident()[elfcpp::EI_ABIVERSION
]);
3023 gold_fatal(_("%s: unsupported ELF machine number %d"),
3024 name
.c_str(), ehdr
.get_e_machine());
3026 if (!parameters
->target_valid())
3027 set_parameters_target(target
);
3028 else if (target
!= ¶meters
->target())
3030 if (punconfigured
!= NULL
)
3031 *punconfigured
= true;
3033 gold_error(_("%s: incompatible target"), name
.c_str());
3037 return target
->make_elf_object
<size
, big_endian
>(name
, input_file
, offset
,
3041 } // End anonymous namespace.
3046 // Return whether INPUT_FILE is an ELF object.
3049 is_elf_object(Input_file
* input_file
, off_t offset
,
3050 const unsigned char** start
, int* read_size
)
3052 off_t filesize
= input_file
->file().filesize();
3053 int want
= elfcpp::Elf_recognizer::max_header_size
;
3054 if (filesize
- offset
< want
)
3055 want
= filesize
- offset
;
3057 const unsigned char* p
= input_file
->file().get_view(offset
, 0, want
,
3062 return elfcpp::Elf_recognizer::is_elf_file(p
, want
);
3065 // Read an ELF file and return the appropriate instance of Object.
3068 make_elf_object(const std::string
& name
, Input_file
* input_file
, off_t offset
,
3069 const unsigned char* p
, section_offset_type bytes
,
3070 bool* punconfigured
)
3072 if (punconfigured
!= NULL
)
3073 *punconfigured
= false;
3076 bool big_endian
= false;
3078 if (!elfcpp::Elf_recognizer::is_valid_header(p
, bytes
, &size
,
3079 &big_endian
, &error
))
3081 gold_error(_("%s: %s"), name
.c_str(), error
.c_str());
3089 #ifdef HAVE_TARGET_32_BIG
3090 elfcpp::Ehdr
<32, true> ehdr(p
);
3091 return make_elf_sized_object
<32, true>(name
, input_file
,
3092 offset
, ehdr
, punconfigured
);
3094 if (punconfigured
!= NULL
)
3095 *punconfigured
= true;
3097 gold_error(_("%s: not configured to support "
3098 "32-bit big-endian object"),
3105 #ifdef HAVE_TARGET_32_LITTLE
3106 elfcpp::Ehdr
<32, false> ehdr(p
);
3107 return make_elf_sized_object
<32, false>(name
, input_file
,
3108 offset
, ehdr
, punconfigured
);
3110 if (punconfigured
!= NULL
)
3111 *punconfigured
= true;
3113 gold_error(_("%s: not configured to support "
3114 "32-bit little-endian object"),
3120 else if (size
== 64)
3124 #ifdef HAVE_TARGET_64_BIG
3125 elfcpp::Ehdr
<64, true> ehdr(p
);
3126 return make_elf_sized_object
<64, true>(name
, input_file
,
3127 offset
, ehdr
, punconfigured
);
3129 if (punconfigured
!= NULL
)
3130 *punconfigured
= true;
3132 gold_error(_("%s: not configured to support "
3133 "64-bit big-endian object"),
3140 #ifdef HAVE_TARGET_64_LITTLE
3141 elfcpp::Ehdr
<64, false> ehdr(p
);
3142 return make_elf_sized_object
<64, false>(name
, input_file
,
3143 offset
, ehdr
, punconfigured
);
3145 if (punconfigured
!= NULL
)
3146 *punconfigured
= true;
3148 gold_error(_("%s: not configured to support "
3149 "64-bit little-endian object"),
3159 // Instantiate the templates we need.
3161 #ifdef HAVE_TARGET_32_LITTLE
3164 Object::read_section_data
<32, false>(elfcpp::Elf_file
<32, false, Object
>*,
3165 Read_symbols_data
*);
3168 #ifdef HAVE_TARGET_32_BIG
3171 Object::read_section_data
<32, true>(elfcpp::Elf_file
<32, true, Object
>*,
3172 Read_symbols_data
*);
3175 #ifdef HAVE_TARGET_64_LITTLE
3178 Object::read_section_data
<64, false>(elfcpp::Elf_file
<64, false, Object
>*,
3179 Read_symbols_data
*);
3182 #ifdef HAVE_TARGET_64_BIG
3185 Object::read_section_data
<64, true>(elfcpp::Elf_file
<64, true, Object
>*,
3186 Read_symbols_data
*);
3189 #ifdef HAVE_TARGET_32_LITTLE
3191 class Sized_relobj_file
<32, false>;
3194 #ifdef HAVE_TARGET_32_BIG
3196 class Sized_relobj_file
<32, true>;
3199 #ifdef HAVE_TARGET_64_LITTLE
3201 class Sized_relobj_file
<64, false>;
3204 #ifdef HAVE_TARGET_64_BIG
3206 class Sized_relobj_file
<64, true>;
3209 #ifdef HAVE_TARGET_32_LITTLE
3211 struct Relocate_info
<32, false>;
3214 #ifdef HAVE_TARGET_32_BIG
3216 struct Relocate_info
<32, true>;
3219 #ifdef HAVE_TARGET_64_LITTLE
3221 struct Relocate_info
<64, false>;
3224 #ifdef HAVE_TARGET_64_BIG
3226 struct Relocate_info
<64, true>;
3229 #ifdef HAVE_TARGET_32_LITTLE
3232 Xindex::initialize_symtab_xindex
<32, false>(Object
*, unsigned int);
3236 Xindex::read_symtab_xindex
<32, false>(Object
*, unsigned int,
3237 const unsigned char*);
3240 #ifdef HAVE_TARGET_32_BIG
3243 Xindex::initialize_symtab_xindex
<32, true>(Object
*, unsigned int);
3247 Xindex::read_symtab_xindex
<32, true>(Object
*, unsigned int,
3248 const unsigned char*);
3251 #ifdef HAVE_TARGET_64_LITTLE
3254 Xindex::initialize_symtab_xindex
<64, false>(Object
*, unsigned int);
3258 Xindex::read_symtab_xindex
<64, false>(Object
*, unsigned int,
3259 const unsigned char*);
3262 #ifdef HAVE_TARGET_64_BIG
3265 Xindex::initialize_symtab_xindex
<64, true>(Object
*, unsigned int);
3269 Xindex::read_symtab_xindex
<64, true>(Object
*, unsigned int,
3270 const unsigned char*);
3273 } // End namespace gold.