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(".gnu.linkonce.d", name
)
336 && strstr(name
, "personality")))
343 // Finalize the incremental relocation information. Allocates a block
344 // of relocation entries for each symbol, and sets the reloc_bases_
345 // array to point to the first entry in each block. If CLEAR_COUNTS
346 // is TRUE, also clear the per-symbol relocation counters.
349 Relobj::finalize_incremental_relocs(Layout
* layout
, bool clear_counts
)
351 unsigned int nsyms
= this->get_global_symbols()->size();
352 this->reloc_bases_
= new unsigned int[nsyms
];
354 gold_assert(this->reloc_bases_
!= NULL
);
355 gold_assert(layout
->incremental_inputs() != NULL
);
357 unsigned int rindex
= layout
->incremental_inputs()->get_reloc_count();
358 for (unsigned int i
= 0; i
< nsyms
; ++i
)
360 this->reloc_bases_
[i
] = rindex
;
361 rindex
+= this->reloc_counts_
[i
];
363 this->reloc_counts_
[i
] = 0;
365 layout
->incremental_inputs()->set_reloc_count(rindex
);
368 // Class Sized_relobj.
370 // Iterate over local symbols, calling a visitor class V for each GOT offset
371 // associated with a local symbol.
373 template<int size
, bool big_endian
>
375 Sized_relobj
<size
, big_endian
>::do_for_all_local_got_entries(
376 Got_offset_list::Visitor
* v
) const
378 unsigned int nsyms
= this->local_symbol_count();
379 for (unsigned int i
= 0; i
< nsyms
; i
++)
381 Local_got_offsets::const_iterator p
= this->local_got_offsets_
.find(i
);
382 if (p
!= this->local_got_offsets_
.end())
384 const Got_offset_list
* got_offsets
= p
->second
;
385 got_offsets
->for_all_got_offsets(v
);
390 // Class Sized_relobj_file.
392 template<int size
, bool big_endian
>
393 Sized_relobj_file
<size
, big_endian
>::Sized_relobj_file(
394 const std::string
& name
,
395 Input_file
* input_file
,
397 const elfcpp::Ehdr
<size
, big_endian
>& ehdr
)
398 : Sized_relobj
<size
, big_endian
>(name
, input_file
, offset
),
399 elf_file_(this, ehdr
),
401 local_symbol_count_(0),
402 output_local_symbol_count_(0),
403 output_local_dynsym_count_(0),
406 local_symbol_offset_(0),
407 local_dynsym_offset_(0),
409 local_plt_offsets_(),
410 kept_comdat_sections_(),
411 has_eh_frame_(false),
412 discarded_eh_frame_shndx_(-1U),
414 deferred_layout_relocs_(),
415 compressed_sections_()
417 this->e_type_
= ehdr
.get_e_type();
420 template<int size
, bool big_endian
>
421 Sized_relobj_file
<size
, big_endian
>::~Sized_relobj_file()
425 // Set up an object file based on the file header. This sets up the
426 // section information.
428 template<int size
, bool big_endian
>
430 Sized_relobj_file
<size
, big_endian
>::do_setup()
432 const unsigned int shnum
= this->elf_file_
.shnum();
433 this->set_shnum(shnum
);
436 // Find the SHT_SYMTAB section, given the section headers. The ELF
437 // standard says that maybe in the future there can be more than one
438 // SHT_SYMTAB section. Until somebody figures out how that could
439 // work, we assume there is only one.
441 template<int size
, bool big_endian
>
443 Sized_relobj_file
<size
, big_endian
>::find_symtab(const unsigned char* pshdrs
)
445 const unsigned int shnum
= this->shnum();
446 this->symtab_shndx_
= 0;
449 // Look through the sections in reverse order, since gas tends
450 // to put the symbol table at the end.
451 const unsigned char* p
= pshdrs
+ shnum
* This::shdr_size
;
452 unsigned int i
= shnum
;
453 unsigned int xindex_shndx
= 0;
454 unsigned int xindex_link
= 0;
458 p
-= This::shdr_size
;
459 typename
This::Shdr
shdr(p
);
460 if (shdr
.get_sh_type() == elfcpp::SHT_SYMTAB
)
462 this->symtab_shndx_
= i
;
463 if (xindex_shndx
> 0 && xindex_link
== i
)
466 new Xindex(this->elf_file_
.large_shndx_offset());
467 xindex
->read_symtab_xindex
<size
, big_endian
>(this,
470 this->set_xindex(xindex
);
475 // Try to pick up the SHT_SYMTAB_SHNDX section, if there is
476 // one. This will work if it follows the SHT_SYMTAB
478 if (shdr
.get_sh_type() == elfcpp::SHT_SYMTAB_SHNDX
)
481 xindex_link
= this->adjust_shndx(shdr
.get_sh_link());
487 // Return the Xindex structure to use for object with lots of
490 template<int size
, bool big_endian
>
492 Sized_relobj_file
<size
, big_endian
>::do_initialize_xindex()
494 gold_assert(this->symtab_shndx_
!= -1U);
495 Xindex
* xindex
= new Xindex(this->elf_file_
.large_shndx_offset());
496 xindex
->initialize_symtab_xindex
<size
, big_endian
>(this, this->symtab_shndx_
);
500 // Return whether SHDR has the right type and flags to be a GNU
501 // .eh_frame section.
503 template<int size
, bool big_endian
>
505 Sized_relobj_file
<size
, big_endian
>::check_eh_frame_flags(
506 const elfcpp::Shdr
<size
, big_endian
>* shdr
) const
508 elfcpp::Elf_Word sh_type
= shdr
->get_sh_type();
509 return ((sh_type
== elfcpp::SHT_PROGBITS
510 || sh_type
== elfcpp::SHT_X86_64_UNWIND
)
511 && (shdr
->get_sh_flags() & elfcpp::SHF_ALLOC
) != 0);
514 // Find the section header with the given name.
516 template<int size
, bool big_endian
>
518 Sized_relobj_file
<size
, big_endian
>::find_shdr(
519 const unsigned char* pshdrs
,
522 section_size_type names_size
,
523 const unsigned char* hdr
) const
525 const unsigned int shnum
= this->shnum();
526 const unsigned char* hdr_end
= pshdrs
+ This::shdr_size
* shnum
;
533 // We found HDR last time we were called, continue looking.
534 typename
This::Shdr
shdr(hdr
);
535 sh_name
= shdr
.get_sh_name();
539 // Look for the next occurrence of NAME in NAMES.
540 // The fact that .shstrtab produced by current GNU tools is
541 // string merged means we shouldn't have both .not.foo and
542 // .foo in .shstrtab, and multiple .foo sections should all
543 // have the same sh_name. However, this is not guaranteed
544 // by the ELF spec and not all ELF object file producers may
546 size_t len
= strlen(name
) + 1;
547 const char *p
= sh_name
? names
+ sh_name
+ len
: names
;
548 p
= reinterpret_cast<const char*>(memmem(p
, names_size
- (p
- names
),
558 hdr
+= This::shdr_size
;
559 while (hdr
< hdr_end
)
561 typename
This::Shdr
shdr(hdr
);
562 if (shdr
.get_sh_name() == sh_name
)
564 hdr
+= This::shdr_size
;
572 // Return whether there is a GNU .eh_frame section, given the section
573 // headers and the section names.
575 template<int size
, bool big_endian
>
577 Sized_relobj_file
<size
, big_endian
>::find_eh_frame(
578 const unsigned char* pshdrs
,
580 section_size_type names_size
) const
582 const unsigned char* s
= NULL
;
586 s
= this->find_shdr(pshdrs
, ".eh_frame", names
, names_size
, s
);
590 typename
This::Shdr
shdr(s
);
591 if (this->check_eh_frame_flags(&shdr
))
596 // Return TRUE if this is a section whose contents will be needed in the
597 // Add_symbols task. This function is only called for sections that have
598 // already passed the test in is_compressed_debug_section(), so we know
599 // that the section name begins with ".zdebug".
602 need_decompressed_section(const char* name
)
604 // Skip over the ".zdebug" and a quick check for the "_".
609 #ifdef ENABLE_THREADS
610 // Decompressing these sections now will help only if we're
612 if (parameters
->options().threads())
614 // We will need .zdebug_str if this is not an incremental link
615 // (i.e., we are processing string merge sections) or if we need
616 // to build a gdb index.
617 if ((!parameters
->incremental() || parameters
->options().gdb_index())
618 && strcmp(name
, "str") == 0)
621 // We will need these other sections when building a gdb index.
622 if (parameters
->options().gdb_index()
623 && (strcmp(name
, "info") == 0
624 || strcmp(name
, "types") == 0
625 || strcmp(name
, "pubnames") == 0
626 || strcmp(name
, "pubtypes") == 0
627 || strcmp(name
, "ranges") == 0
628 || strcmp(name
, "abbrev") == 0))
633 // Even when single-threaded, we will need .zdebug_str if this is
634 // not an incremental link and we are building a gdb index.
635 // Otherwise, we would decompress the section twice: once for
636 // string merge processing, and once for building the gdb index.
637 if (!parameters
->incremental()
638 && parameters
->options().gdb_index()
639 && strcmp(name
, "str") == 0)
645 // Build a table for any compressed debug sections, mapping each section index
646 // to the uncompressed size and (if needed) the decompressed contents.
648 template<int size
, bool big_endian
>
649 Compressed_section_map
*
650 build_compressed_section_map(
651 const unsigned char* pshdrs
,
654 section_size_type names_size
,
655 Sized_relobj_file
<size
, big_endian
>* obj
)
657 Compressed_section_map
* uncompressed_map
= new Compressed_section_map();
658 const unsigned int shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
659 const unsigned char* p
= pshdrs
+ shdr_size
;
661 for (unsigned int i
= 1; i
< shnum
; ++i
, p
+= shdr_size
)
663 typename
elfcpp::Shdr
<size
, big_endian
> shdr(p
);
664 if (shdr
.get_sh_type() == elfcpp::SHT_PROGBITS
665 && (shdr
.get_sh_flags() & elfcpp::SHF_ALLOC
) == 0)
667 if (shdr
.get_sh_name() >= names_size
)
669 obj
->error(_("bad section name offset for section %u: %lu"),
670 i
, static_cast<unsigned long>(shdr
.get_sh_name()));
674 const char* name
= names
+ shdr
.get_sh_name();
675 if (is_compressed_debug_section(name
))
677 section_size_type len
;
678 const unsigned char* contents
=
679 obj
->section_contents(i
, &len
, false);
680 uint64_t uncompressed_size
= get_uncompressed_size(contents
, len
);
681 Compressed_section_info info
;
682 info
.size
= convert_to_section_size_type(uncompressed_size
);
683 info
.contents
= NULL
;
684 if (uncompressed_size
!= -1ULL)
686 unsigned char* uncompressed_data
= NULL
;
687 if (need_decompressed_section(name
))
689 uncompressed_data
= new unsigned char[uncompressed_size
];
690 if (decompress_input_section(contents
, len
,
693 info
.contents
= uncompressed_data
;
695 delete[] uncompressed_data
;
697 (*uncompressed_map
)[i
] = info
;
702 return uncompressed_map
;
705 // Stash away info for a number of special sections.
706 // Return true if any of the sections found require local symbols to be read.
708 template<int size
, bool big_endian
>
710 Sized_relobj_file
<size
, big_endian
>::do_find_special_sections(
711 Read_symbols_data
* sd
)
713 const unsigned char* const pshdrs
= sd
->section_headers
->data();
714 const unsigned char* namesu
= sd
->section_names
->data();
715 const char* names
= reinterpret_cast<const char*>(namesu
);
717 if (this->find_eh_frame(pshdrs
, names
, sd
->section_names_size
))
718 this->has_eh_frame_
= true;
720 if (memmem(names
, sd
->section_names_size
, ".zdebug_", 8) != NULL
)
721 this->compressed_sections_
722 = build_compressed_section_map(pshdrs
, this->shnum(), names
,
723 sd
->section_names_size
, this);
724 return (this->has_eh_frame_
725 || (!parameters
->options().relocatable()
726 && parameters
->options().gdb_index()
727 && (memmem(names
, sd
->section_names_size
, "debug_info", 12) == 0
728 || memmem(names
, sd
->section_names_size
, "debug_types",
732 // Read the sections and symbols from an object file.
734 template<int size
, bool big_endian
>
736 Sized_relobj_file
<size
, big_endian
>::do_read_symbols(Read_symbols_data
* sd
)
738 this->read_section_data(&this->elf_file_
, sd
);
740 const unsigned char* const pshdrs
= sd
->section_headers
->data();
742 this->find_symtab(pshdrs
);
744 bool need_local_symbols
= this->do_find_special_sections(sd
);
747 sd
->symbols_size
= 0;
748 sd
->external_symbols_offset
= 0;
749 sd
->symbol_names
= NULL
;
750 sd
->symbol_names_size
= 0;
752 if (this->symtab_shndx_
== 0)
754 // No symbol table. Weird but legal.
758 // Get the symbol table section header.
759 typename
This::Shdr
symtabshdr(pshdrs
760 + this->symtab_shndx_
* This::shdr_size
);
761 gold_assert(symtabshdr
.get_sh_type() == elfcpp::SHT_SYMTAB
);
763 // If this object has a .eh_frame section, or if building a .gdb_index
764 // section and there is debug info, we need all the symbols.
765 // Otherwise we only need the external symbols. While it would be
766 // simpler to just always read all the symbols, I've seen object
767 // files with well over 2000 local symbols, which for a 64-bit
768 // object file format is over 5 pages that we don't need to read
771 const int sym_size
= This::sym_size
;
772 const unsigned int loccount
= symtabshdr
.get_sh_info();
773 this->local_symbol_count_
= loccount
;
774 this->local_values_
.resize(loccount
);
775 section_offset_type locsize
= loccount
* sym_size
;
776 off_t dataoff
= symtabshdr
.get_sh_offset();
777 section_size_type datasize
=
778 convert_to_section_size_type(symtabshdr
.get_sh_size());
779 off_t extoff
= dataoff
+ locsize
;
780 section_size_type extsize
= datasize
- locsize
;
782 off_t readoff
= need_local_symbols
? dataoff
: extoff
;
783 section_size_type readsize
= need_local_symbols
? datasize
: extsize
;
787 // No external symbols. Also weird but also legal.
791 File_view
* fvsymtab
= this->get_lasting_view(readoff
, readsize
, true, false);
793 // Read the section header for the symbol names.
794 unsigned int strtab_shndx
= this->adjust_shndx(symtabshdr
.get_sh_link());
795 if (strtab_shndx
>= this->shnum())
797 this->error(_("invalid symbol table name index: %u"), strtab_shndx
);
800 typename
This::Shdr
strtabshdr(pshdrs
+ strtab_shndx
* This::shdr_size
);
801 if (strtabshdr
.get_sh_type() != elfcpp::SHT_STRTAB
)
803 this->error(_("symbol table name section has wrong type: %u"),
804 static_cast<unsigned int>(strtabshdr
.get_sh_type()));
808 // Read the symbol names.
809 File_view
* fvstrtab
= this->get_lasting_view(strtabshdr
.get_sh_offset(),
810 strtabshdr
.get_sh_size(),
813 sd
->symbols
= fvsymtab
;
814 sd
->symbols_size
= readsize
;
815 sd
->external_symbols_offset
= need_local_symbols
? locsize
: 0;
816 sd
->symbol_names
= fvstrtab
;
817 sd
->symbol_names_size
=
818 convert_to_section_size_type(strtabshdr
.get_sh_size());
821 // Return the section index of symbol SYM. Set *VALUE to its value in
822 // the object file. Set *IS_ORDINARY if this is an ordinary section
823 // index, not a special code between SHN_LORESERVE and SHN_HIRESERVE.
824 // Note that for a symbol which is not defined in this object file,
825 // this will set *VALUE to 0 and return SHN_UNDEF; it will not return
826 // the final value of the symbol in the link.
828 template<int size
, bool big_endian
>
830 Sized_relobj_file
<size
, big_endian
>::symbol_section_and_value(unsigned int sym
,
834 section_size_type symbols_size
;
835 const unsigned char* symbols
= this->section_contents(this->symtab_shndx_
,
839 const size_t count
= symbols_size
/ This::sym_size
;
840 gold_assert(sym
< count
);
842 elfcpp::Sym
<size
, big_endian
> elfsym(symbols
+ sym
* This::sym_size
);
843 *value
= elfsym
.get_st_value();
845 return this->adjust_sym_shndx(sym
, elfsym
.get_st_shndx(), is_ordinary
);
848 // Return whether to include a section group in the link. LAYOUT is
849 // used to keep track of which section groups we have already seen.
850 // INDEX is the index of the section group and SHDR is the section
851 // header. If we do not want to include this group, we set bits in
852 // OMIT for each section which should be discarded.
854 template<int size
, bool big_endian
>
856 Sized_relobj_file
<size
, big_endian
>::include_section_group(
857 Symbol_table
* symtab
,
861 const unsigned char* shdrs
,
862 const char* section_names
,
863 section_size_type section_names_size
,
864 std::vector
<bool>* omit
)
866 // Read the section contents.
867 typename
This::Shdr
shdr(shdrs
+ index
* This::shdr_size
);
868 const unsigned char* pcon
= this->get_view(shdr
.get_sh_offset(),
869 shdr
.get_sh_size(), true, false);
870 const elfcpp::Elf_Word
* pword
=
871 reinterpret_cast<const elfcpp::Elf_Word
*>(pcon
);
873 // The first word contains flags. We only care about COMDAT section
874 // groups. Other section groups are always included in the link
875 // just like ordinary sections.
876 elfcpp::Elf_Word flags
= elfcpp::Swap
<32, big_endian
>::readval(pword
);
878 // Look up the group signature, which is the name of a symbol. ELF
879 // uses a symbol name because some group signatures are long, and
880 // the name is generally already in the symbol table, so it makes
881 // sense to put the long string just once in .strtab rather than in
882 // both .strtab and .shstrtab.
884 // Get the appropriate symbol table header (this will normally be
885 // the single SHT_SYMTAB section, but in principle it need not be).
886 const unsigned int link
= this->adjust_shndx(shdr
.get_sh_link());
887 typename
This::Shdr
symshdr(this, this->elf_file_
.section_header(link
));
889 // Read the symbol table entry.
890 unsigned int symndx
= shdr
.get_sh_info();
891 if (symndx
>= symshdr
.get_sh_size() / This::sym_size
)
893 this->error(_("section group %u info %u out of range"),
897 off_t symoff
= symshdr
.get_sh_offset() + symndx
* This::sym_size
;
898 const unsigned char* psym
= this->get_view(symoff
, This::sym_size
, true,
900 elfcpp::Sym
<size
, big_endian
> sym(psym
);
902 // Read the symbol table names.
903 section_size_type symnamelen
;
904 const unsigned char* psymnamesu
;
905 psymnamesu
= this->section_contents(this->adjust_shndx(symshdr
.get_sh_link()),
907 const char* psymnames
= reinterpret_cast<const char*>(psymnamesu
);
909 // Get the section group signature.
910 if (sym
.get_st_name() >= symnamelen
)
912 this->error(_("symbol %u name offset %u out of range"),
913 symndx
, sym
.get_st_name());
917 std::string
signature(psymnames
+ sym
.get_st_name());
919 // It seems that some versions of gas will create a section group
920 // associated with a section symbol, and then fail to give a name to
921 // the section symbol. In such a case, use the name of the section.
922 if (signature
[0] == '\0' && sym
.get_st_type() == elfcpp::STT_SECTION
)
925 unsigned int sym_shndx
= this->adjust_sym_shndx(symndx
,
928 if (!is_ordinary
|| sym_shndx
>= this->shnum())
930 this->error(_("symbol %u invalid section index %u"),
934 typename
This::Shdr
member_shdr(shdrs
+ sym_shndx
* This::shdr_size
);
935 if (member_shdr
.get_sh_name() < section_names_size
)
936 signature
= section_names
+ member_shdr
.get_sh_name();
939 // Record this section group in the layout, and see whether we've already
940 // seen one with the same signature.
943 Kept_section
* kept_section
= NULL
;
945 if ((flags
& elfcpp::GRP_COMDAT
) == 0)
947 include_group
= true;
952 include_group
= layout
->find_or_add_kept_section(signature
,
954 true, &kept_section
);
958 if (is_comdat
&& include_group
)
960 Incremental_inputs
* incremental_inputs
= layout
->incremental_inputs();
961 if (incremental_inputs
!= NULL
)
962 incremental_inputs
->report_comdat_group(this, signature
.c_str());
965 size_t count
= shdr
.get_sh_size() / sizeof(elfcpp::Elf_Word
);
967 std::vector
<unsigned int> shndxes
;
968 bool relocate_group
= include_group
&& parameters
->options().relocatable();
970 shndxes
.reserve(count
- 1);
972 for (size_t i
= 1; i
< count
; ++i
)
974 elfcpp::Elf_Word shndx
=
975 this->adjust_shndx(elfcpp::Swap
<32, big_endian
>::readval(pword
+ i
));
978 shndxes
.push_back(shndx
);
980 if (shndx
>= this->shnum())
982 this->error(_("section %u in section group %u out of range"),
987 // Check for an earlier section number, since we're going to get
988 // it wrong--we may have already decided to include the section.
990 this->error(_("invalid section group %u refers to earlier section %u"),
993 // Get the name of the member section.
994 typename
This::Shdr
member_shdr(shdrs
+ shndx
* This::shdr_size
);
995 if (member_shdr
.get_sh_name() >= section_names_size
)
997 // This is an error, but it will be diagnosed eventually
998 // in do_layout, so we don't need to do anything here but
1002 std::string
mname(section_names
+ member_shdr
.get_sh_name());
1007 kept_section
->add_comdat_section(mname
, shndx
,
1008 member_shdr
.get_sh_size());
1012 (*omit
)[shndx
] = true;
1016 Relobj
* kept_object
= kept_section
->object();
1017 if (kept_section
->is_comdat())
1019 // Find the corresponding kept section, and store
1020 // that info in the discarded section table.
1021 unsigned int kept_shndx
;
1023 if (kept_section
->find_comdat_section(mname
, &kept_shndx
,
1026 // We don't keep a mapping for this section if
1027 // it has a different size. The mapping is only
1028 // used for relocation processing, and we don't
1029 // want to treat the sections as similar if the
1030 // sizes are different. Checking the section
1031 // size is the approach used by the GNU linker.
1032 if (kept_size
== member_shdr
.get_sh_size())
1033 this->set_kept_comdat_section(shndx
, kept_object
,
1039 // The existing section is a linkonce section. Add
1040 // a mapping if there is exactly one section in the
1041 // group (which is true when COUNT == 2) and if it
1042 // is the same size.
1044 && (kept_section
->linkonce_size()
1045 == member_shdr
.get_sh_size()))
1046 this->set_kept_comdat_section(shndx
, kept_object
,
1047 kept_section
->shndx());
1054 layout
->layout_group(symtab
, this, index
, name
, signature
.c_str(),
1055 shdr
, flags
, &shndxes
);
1057 return include_group
;
1060 // Whether to include a linkonce section in the link. NAME is the
1061 // name of the section and SHDR is the section header.
1063 // Linkonce sections are a GNU extension implemented in the original
1064 // GNU linker before section groups were defined. The semantics are
1065 // that we only include one linkonce section with a given name. The
1066 // name of a linkonce section is normally .gnu.linkonce.T.SYMNAME,
1067 // where T is the type of section and SYMNAME is the name of a symbol.
1068 // In an attempt to make linkonce sections interact well with section
1069 // groups, we try to identify SYMNAME and use it like a section group
1070 // signature. We want to block section groups with that signature,
1071 // but not other linkonce sections with that signature. We also use
1072 // the full name of the linkonce section as a normal section group
1075 template<int size
, bool big_endian
>
1077 Sized_relobj_file
<size
, big_endian
>::include_linkonce_section(
1081 const elfcpp::Shdr
<size
, big_endian
>& shdr
)
1083 typename
elfcpp::Elf_types
<size
>::Elf_WXword sh_size
= shdr
.get_sh_size();
1084 // In general the symbol name we want will be the string following
1085 // the last '.'. However, we have to handle the case of
1086 // .gnu.linkonce.t.__i686.get_pc_thunk.bx, which was generated by
1087 // some versions of gcc. So we use a heuristic: if the name starts
1088 // with ".gnu.linkonce.t.", we use everything after that. Otherwise
1089 // we look for the last '.'. We can't always simply skip
1090 // ".gnu.linkonce.X", because we have to deal with cases like
1091 // ".gnu.linkonce.d.rel.ro.local".
1092 const char* const linkonce_t
= ".gnu.linkonce.t.";
1093 const char* symname
;
1094 if (strncmp(name
, linkonce_t
, strlen(linkonce_t
)) == 0)
1095 symname
= name
+ strlen(linkonce_t
);
1097 symname
= strrchr(name
, '.') + 1;
1098 std::string
sig1(symname
);
1099 std::string
sig2(name
);
1100 Kept_section
* kept1
;
1101 Kept_section
* kept2
;
1102 bool include1
= layout
->find_or_add_kept_section(sig1
, this, index
, false,
1104 bool include2
= layout
->find_or_add_kept_section(sig2
, this, index
, false,
1109 // We are not including this section because we already saw the
1110 // name of the section as a signature. This normally implies
1111 // that the kept section is another linkonce section. If it is
1112 // the same size, record it as the section which corresponds to
1114 if (kept2
->object() != NULL
1115 && !kept2
->is_comdat()
1116 && kept2
->linkonce_size() == sh_size
)
1117 this->set_kept_comdat_section(index
, kept2
->object(), kept2
->shndx());
1121 // The section is being discarded on the basis of its symbol
1122 // name. This means that the corresponding kept section was
1123 // part of a comdat group, and it will be difficult to identify
1124 // the specific section within that group that corresponds to
1125 // this linkonce section. We'll handle the simple case where
1126 // the group has only one member section. Otherwise, it's not
1127 // worth the effort.
1128 unsigned int kept_shndx
;
1130 if (kept1
->object() != NULL
1131 && kept1
->is_comdat()
1132 && kept1
->find_single_comdat_section(&kept_shndx
, &kept_size
)
1133 && kept_size
== sh_size
)
1134 this->set_kept_comdat_section(index
, kept1
->object(), kept_shndx
);
1138 kept1
->set_linkonce_size(sh_size
);
1139 kept2
->set_linkonce_size(sh_size
);
1142 return include1
&& include2
;
1145 // Layout an input section.
1147 template<int size
, bool big_endian
>
1149 Sized_relobj_file
<size
, big_endian
>::layout_section(
1153 const typename
This::Shdr
& shdr
,
1154 unsigned int reloc_shndx
,
1155 unsigned int reloc_type
)
1158 Output_section
* os
= layout
->layout(this, shndx
, name
, shdr
,
1159 reloc_shndx
, reloc_type
, &offset
);
1161 this->output_sections()[shndx
] = os
;
1163 this->section_offsets()[shndx
] = invalid_address
;
1165 this->section_offsets()[shndx
] = convert_types
<Address
, off_t
>(offset
);
1167 // If this section requires special handling, and if there are
1168 // relocs that apply to it, then we must do the special handling
1169 // before we apply the relocs.
1170 if (offset
== -1 && reloc_shndx
!= 0)
1171 this->set_relocs_must_follow_section_writes();
1174 // Layout an input .eh_frame section.
1176 template<int size
, bool big_endian
>
1178 Sized_relobj_file
<size
, big_endian
>::layout_eh_frame_section(
1180 const unsigned char* symbols_data
,
1181 section_size_type symbols_size
,
1182 const unsigned char* symbol_names_data
,
1183 section_size_type symbol_names_size
,
1185 const typename
This::Shdr
& shdr
,
1186 unsigned int reloc_shndx
,
1187 unsigned int reloc_type
)
1189 gold_assert(this->has_eh_frame_
);
1192 Output_section
* os
= layout
->layout_eh_frame(this,
1202 this->output_sections()[shndx
] = os
;
1203 if (os
== NULL
|| offset
== -1)
1205 // An object can contain at most one section holding exception
1206 // frame information.
1207 gold_assert(this->discarded_eh_frame_shndx_
== -1U);
1208 this->discarded_eh_frame_shndx_
= shndx
;
1209 this->section_offsets()[shndx
] = invalid_address
;
1212 this->section_offsets()[shndx
] = convert_types
<Address
, off_t
>(offset
);
1214 // If this section requires special handling, and if there are
1215 // relocs that aply to it, then we must do the special handling
1216 // before we apply the relocs.
1217 if (os
!= NULL
&& offset
== -1 && reloc_shndx
!= 0)
1218 this->set_relocs_must_follow_section_writes();
1221 // Lay out the input sections. We walk through the sections and check
1222 // whether they should be included in the link. If they should, we
1223 // pass them to the Layout object, which will return an output section
1225 // This function is called twice sometimes, two passes, when mapping
1226 // of input sections to output sections must be delayed.
1227 // This is true for the following :
1228 // * Garbage collection (--gc-sections): Some input sections will be
1229 // discarded and hence the assignment must wait until the second pass.
1230 // In the first pass, it is for setting up some sections as roots to
1231 // a work-list for --gc-sections and to do comdat processing.
1232 // * Identical Code Folding (--icf=<safe,all>): Some input sections
1233 // will be folded and hence the assignment must wait.
1234 // * Using plugins to map some sections to unique segments: Mapping
1235 // some sections to unique segments requires mapping them to unique
1236 // output sections too. This can be done via plugins now and this
1237 // information is not available in the first pass.
1239 template<int size
, bool big_endian
>
1241 Sized_relobj_file
<size
, big_endian
>::do_layout(Symbol_table
* symtab
,
1243 Read_symbols_data
* sd
)
1245 const unsigned int shnum
= this->shnum();
1247 /* Should this function be called twice? */
1248 bool is_two_pass
= (parameters
->options().gc_sections()
1249 || parameters
->options().icf_enabled()
1250 || layout
->is_unique_segment_for_sections_specified());
1252 /* Only one of is_pass_one and is_pass_two is true. Both are false when
1253 a two-pass approach is not needed. */
1254 bool is_pass_one
= false;
1255 bool is_pass_two
= false;
1257 Symbols_data
* gc_sd
= NULL
;
1259 /* Check if do_layout needs to be two-pass. If so, find out which pass
1260 should happen. In the first pass, the data in sd is saved to be used
1261 later in the second pass. */
1264 gc_sd
= this->get_symbols_data();
1267 gold_assert(sd
!= NULL
);
1272 if (parameters
->options().gc_sections())
1273 gold_assert(symtab
->gc()->is_worklist_ready());
1274 if (parameters
->options().icf_enabled())
1275 gold_assert(symtab
->icf()->is_icf_ready());
1285 // During garbage collection save the symbols data to use it when
1286 // re-entering this function.
1287 gc_sd
= new Symbols_data
;
1288 this->copy_symbols_data(gc_sd
, sd
, This::shdr_size
* shnum
);
1289 this->set_symbols_data(gc_sd
);
1292 const unsigned char* section_headers_data
= NULL
;
1293 section_size_type section_names_size
;
1294 const unsigned char* symbols_data
= NULL
;
1295 section_size_type symbols_size
;
1296 const unsigned char* symbol_names_data
= NULL
;
1297 section_size_type symbol_names_size
;
1301 section_headers_data
= gc_sd
->section_headers_data
;
1302 section_names_size
= gc_sd
->section_names_size
;
1303 symbols_data
= gc_sd
->symbols_data
;
1304 symbols_size
= gc_sd
->symbols_size
;
1305 symbol_names_data
= gc_sd
->symbol_names_data
;
1306 symbol_names_size
= gc_sd
->symbol_names_size
;
1310 section_headers_data
= sd
->section_headers
->data();
1311 section_names_size
= sd
->section_names_size
;
1312 if (sd
->symbols
!= NULL
)
1313 symbols_data
= sd
->symbols
->data();
1314 symbols_size
= sd
->symbols_size
;
1315 if (sd
->symbol_names
!= NULL
)
1316 symbol_names_data
= sd
->symbol_names
->data();
1317 symbol_names_size
= sd
->symbol_names_size
;
1320 // Get the section headers.
1321 const unsigned char* shdrs
= section_headers_data
;
1322 const unsigned char* pshdrs
;
1324 // Get the section names.
1325 const unsigned char* pnamesu
= (is_two_pass
1326 ? gc_sd
->section_names_data
1327 : sd
->section_names
->data());
1329 const char* pnames
= reinterpret_cast<const char*>(pnamesu
);
1331 // If any input files have been claimed by plugins, we need to defer
1332 // actual layout until the replacement files have arrived.
1333 const bool should_defer_layout
=
1334 (parameters
->options().has_plugins()
1335 && parameters
->options().plugins()->should_defer_layout());
1336 unsigned int num_sections_to_defer
= 0;
1338 // For each section, record the index of the reloc section if any.
1339 // Use 0 to mean that there is no reloc section, -1U to mean that
1340 // there is more than one.
1341 std::vector
<unsigned int> reloc_shndx(shnum
, 0);
1342 std::vector
<unsigned int> reloc_type(shnum
, elfcpp::SHT_NULL
);
1343 // Skip the first, dummy, section.
1344 pshdrs
= shdrs
+ This::shdr_size
;
1345 for (unsigned int i
= 1; i
< shnum
; ++i
, pshdrs
+= This::shdr_size
)
1347 typename
This::Shdr
shdr(pshdrs
);
1349 // Count the number of sections whose layout will be deferred.
1350 if (should_defer_layout
&& (shdr
.get_sh_flags() & elfcpp::SHF_ALLOC
))
1351 ++num_sections_to_defer
;
1353 unsigned int sh_type
= shdr
.get_sh_type();
1354 if (sh_type
== elfcpp::SHT_REL
|| sh_type
== elfcpp::SHT_RELA
)
1356 unsigned int target_shndx
= this->adjust_shndx(shdr
.get_sh_info());
1357 if (target_shndx
== 0 || target_shndx
>= shnum
)
1359 this->error(_("relocation section %u has bad info %u"),
1364 if (reloc_shndx
[target_shndx
] != 0)
1365 reloc_shndx
[target_shndx
] = -1U;
1368 reloc_shndx
[target_shndx
] = i
;
1369 reloc_type
[target_shndx
] = sh_type
;
1374 Output_sections
& out_sections(this->output_sections());
1375 std::vector
<Address
>& out_section_offsets(this->section_offsets());
1379 out_sections
.resize(shnum
);
1380 out_section_offsets
.resize(shnum
);
1383 // If we are only linking for symbols, then there is nothing else to
1385 if (this->input_file()->just_symbols())
1389 delete sd
->section_headers
;
1390 sd
->section_headers
= NULL
;
1391 delete sd
->section_names
;
1392 sd
->section_names
= NULL
;
1397 if (num_sections_to_defer
> 0)
1399 parameters
->options().plugins()->add_deferred_layout_object(this);
1400 this->deferred_layout_
.reserve(num_sections_to_defer
);
1403 // Whether we've seen a .note.GNU-stack section.
1404 bool seen_gnu_stack
= false;
1405 // The flags of a .note.GNU-stack section.
1406 uint64_t gnu_stack_flags
= 0;
1408 // Keep track of which sections to omit.
1409 std::vector
<bool> omit(shnum
, false);
1411 // Keep track of reloc sections when emitting relocations.
1412 const bool relocatable
= parameters
->options().relocatable();
1413 const bool emit_relocs
= (relocatable
1414 || parameters
->options().emit_relocs());
1415 std::vector
<unsigned int> reloc_sections
;
1417 // Keep track of .eh_frame sections.
1418 std::vector
<unsigned int> eh_frame_sections
;
1420 // Keep track of .debug_info and .debug_types sections.
1421 std::vector
<unsigned int> debug_info_sections
;
1422 std::vector
<unsigned int> debug_types_sections
;
1424 // Skip the first, dummy, section.
1425 pshdrs
= shdrs
+ This::shdr_size
;
1426 for (unsigned int i
= 1; i
< shnum
; ++i
, pshdrs
+= This::shdr_size
)
1428 typename
This::Shdr
shdr(pshdrs
);
1430 if (shdr
.get_sh_name() >= section_names_size
)
1432 this->error(_("bad section name offset for section %u: %lu"),
1433 i
, static_cast<unsigned long>(shdr
.get_sh_name()));
1437 const char* name
= pnames
+ shdr
.get_sh_name();
1441 if (this->handle_gnu_warning_section(name
, i
, symtab
))
1443 if (!relocatable
&& !parameters
->options().shared())
1447 // The .note.GNU-stack section is special. It gives the
1448 // protection flags that this object file requires for the stack
1450 if (strcmp(name
, ".note.GNU-stack") == 0)
1452 seen_gnu_stack
= true;
1453 gnu_stack_flags
|= shdr
.get_sh_flags();
1457 // The .note.GNU-split-stack section is also special. It
1458 // indicates that the object was compiled with
1460 if (this->handle_split_stack_section(name
))
1462 if (!relocatable
&& !parameters
->options().shared())
1466 // Skip attributes section.
1467 if (parameters
->target().is_attributes_section(name
))
1472 bool discard
= omit
[i
];
1475 if (shdr
.get_sh_type() == elfcpp::SHT_GROUP
)
1477 if (!this->include_section_group(symtab
, layout
, i
, name
,
1483 else if ((shdr
.get_sh_flags() & elfcpp::SHF_GROUP
) == 0
1484 && Layout::is_linkonce(name
))
1486 if (!this->include_linkonce_section(layout
, i
, name
, shdr
))
1491 // Add the section to the incremental inputs layout.
1492 Incremental_inputs
* incremental_inputs
= layout
->incremental_inputs();
1493 if (incremental_inputs
!= NULL
1495 && can_incremental_update(shdr
.get_sh_type()))
1497 off_t sh_size
= shdr
.get_sh_size();
1498 section_size_type uncompressed_size
;
1499 if (this->section_is_compressed(i
, &uncompressed_size
))
1500 sh_size
= uncompressed_size
;
1501 incremental_inputs
->report_input_section(this, i
, name
, sh_size
);
1506 // Do not include this section in the link.
1507 out_sections
[i
] = NULL
;
1508 out_section_offsets
[i
] = invalid_address
;
1513 if (is_pass_one
&& parameters
->options().gc_sections())
1515 if (this->is_section_name_included(name
)
1516 || layout
->keep_input_section (this, name
)
1517 || shdr
.get_sh_type() == elfcpp::SHT_INIT_ARRAY
1518 || shdr
.get_sh_type() == elfcpp::SHT_FINI_ARRAY
)
1520 symtab
->gc()->worklist().push(Section_id(this, i
));
1522 // If the section name XXX can be represented as a C identifier
1523 // it cannot be discarded if there are references to
1524 // __start_XXX and __stop_XXX symbols. These need to be
1525 // specially handled.
1526 if (is_cident(name
))
1528 symtab
->gc()->add_cident_section(name
, Section_id(this, i
));
1532 // When doing a relocatable link we are going to copy input
1533 // reloc sections into the output. We only want to copy the
1534 // ones associated with sections which are not being discarded.
1535 // However, we don't know that yet for all sections. So save
1536 // reloc sections and process them later. Garbage collection is
1537 // not triggered when relocatable code is desired.
1539 && (shdr
.get_sh_type() == elfcpp::SHT_REL
1540 || shdr
.get_sh_type() == elfcpp::SHT_RELA
))
1542 reloc_sections
.push_back(i
);
1546 if (relocatable
&& shdr
.get_sh_type() == elfcpp::SHT_GROUP
)
1549 // The .eh_frame section is special. It holds exception frame
1550 // information that we need to read in order to generate the
1551 // exception frame header. We process these after all the other
1552 // sections so that the exception frame reader can reliably
1553 // determine which sections are being discarded, and discard the
1554 // corresponding information.
1556 && strcmp(name
, ".eh_frame") == 0
1557 && this->check_eh_frame_flags(&shdr
))
1561 out_sections
[i
] = reinterpret_cast<Output_section
*>(1);
1562 out_section_offsets
[i
] = invalid_address
;
1564 else if (should_defer_layout
)
1565 this->deferred_layout_
.push_back(Deferred_layout(i
, name
,
1570 eh_frame_sections
.push_back(i
);
1574 if (is_pass_two
&& parameters
->options().gc_sections())
1576 // This is executed during the second pass of garbage
1577 // collection. do_layout has been called before and some
1578 // sections have been already discarded. Simply ignore
1579 // such sections this time around.
1580 if (out_sections
[i
] == NULL
)
1582 gold_assert(out_section_offsets
[i
] == invalid_address
);
1585 if (((shdr
.get_sh_flags() & elfcpp::SHF_ALLOC
) != 0)
1586 && symtab
->gc()->is_section_garbage(this, i
))
1588 if (parameters
->options().print_gc_sections())
1589 gold_info(_("%s: removing unused section from '%s'"
1591 program_name
, this->section_name(i
).c_str(),
1592 this->name().c_str());
1593 out_sections
[i
] = NULL
;
1594 out_section_offsets
[i
] = invalid_address
;
1599 if (is_pass_two
&& parameters
->options().icf_enabled())
1601 if (out_sections
[i
] == NULL
)
1603 gold_assert(out_section_offsets
[i
] == invalid_address
);
1606 if (((shdr
.get_sh_flags() & elfcpp::SHF_ALLOC
) != 0)
1607 && symtab
->icf()->is_section_folded(this, i
))
1609 if (parameters
->options().print_icf_sections())
1612 symtab
->icf()->get_folded_section(this, i
);
1613 Relobj
* folded_obj
=
1614 reinterpret_cast<Relobj
*>(folded
.first
);
1615 gold_info(_("%s: ICF folding section '%s' in file '%s'"
1616 "into '%s' in file '%s'"),
1617 program_name
, this->section_name(i
).c_str(),
1618 this->name().c_str(),
1619 folded_obj
->section_name(folded
.second
).c_str(),
1620 folded_obj
->name().c_str());
1622 out_sections
[i
] = NULL
;
1623 out_section_offsets
[i
] = invalid_address
;
1628 // Defer layout here if input files are claimed by plugins. When gc
1629 // is turned on this function is called twice. For the second call
1630 // should_defer_layout should be false.
1631 if (should_defer_layout
&& (shdr
.get_sh_flags() & elfcpp::SHF_ALLOC
))
1633 gold_assert(!is_pass_two
);
1634 this->deferred_layout_
.push_back(Deferred_layout(i
, name
,
1638 // Put dummy values here; real values will be supplied by
1639 // do_layout_deferred_sections.
1640 out_sections
[i
] = reinterpret_cast<Output_section
*>(2);
1641 out_section_offsets
[i
] = invalid_address
;
1645 // During gc_pass_two if a section that was previously deferred is
1646 // found, do not layout the section as layout_deferred_sections will
1647 // do it later from gold.cc.
1649 && (out_sections
[i
] == reinterpret_cast<Output_section
*>(2)))
1654 // This is during garbage collection. The out_sections are
1655 // assigned in the second call to this function.
1656 out_sections
[i
] = reinterpret_cast<Output_section
*>(1);
1657 out_section_offsets
[i
] = invalid_address
;
1661 // When garbage collection is switched on the actual layout
1662 // only happens in the second call.
1663 this->layout_section(layout
, i
, name
, shdr
, reloc_shndx
[i
],
1666 // When generating a .gdb_index section, we do additional
1667 // processing of .debug_info and .debug_types sections after all
1668 // the other sections for the same reason as above.
1670 && parameters
->options().gdb_index()
1671 && !(shdr
.get_sh_flags() & elfcpp::SHF_ALLOC
))
1673 if (strcmp(name
, ".debug_info") == 0
1674 || strcmp(name
, ".zdebug_info") == 0)
1675 debug_info_sections
.push_back(i
);
1676 else if (strcmp(name
, ".debug_types") == 0
1677 || strcmp(name
, ".zdebug_types") == 0)
1678 debug_types_sections
.push_back(i
);
1684 layout
->layout_gnu_stack(seen_gnu_stack
, gnu_stack_flags
, this);
1686 // When doing a relocatable link handle the reloc sections at the
1687 // end. Garbage collection and Identical Code Folding is not
1688 // turned on for relocatable code.
1690 this->size_relocatable_relocs();
1692 gold_assert(!is_two_pass
|| reloc_sections
.empty());
1694 for (std::vector
<unsigned int>::const_iterator p
= reloc_sections
.begin();
1695 p
!= reloc_sections
.end();
1698 unsigned int i
= *p
;
1699 const unsigned char* pshdr
;
1700 pshdr
= section_headers_data
+ i
* This::shdr_size
;
1701 typename
This::Shdr
shdr(pshdr
);
1703 unsigned int data_shndx
= this->adjust_shndx(shdr
.get_sh_info());
1704 if (data_shndx
>= shnum
)
1706 // We already warned about this above.
1710 Output_section
* data_section
= out_sections
[data_shndx
];
1711 if (data_section
== reinterpret_cast<Output_section
*>(2))
1713 // The layout for the data section was deferred, so we need
1714 // to defer the relocation section, too.
1715 const char* name
= pnames
+ shdr
.get_sh_name();
1716 this->deferred_layout_relocs_
.push_back(
1717 Deferred_layout(i
, name
, pshdr
, 0, elfcpp::SHT_NULL
));
1718 out_sections
[i
] = reinterpret_cast<Output_section
*>(2);
1719 out_section_offsets
[i
] = invalid_address
;
1722 if (data_section
== NULL
)
1724 out_sections
[i
] = NULL
;
1725 out_section_offsets
[i
] = invalid_address
;
1729 Relocatable_relocs
* rr
= new Relocatable_relocs();
1730 this->set_relocatable_relocs(i
, rr
);
1732 Output_section
* os
= layout
->layout_reloc(this, i
, shdr
, data_section
,
1734 out_sections
[i
] = os
;
1735 out_section_offsets
[i
] = invalid_address
;
1738 // Handle the .eh_frame sections at the end.
1739 gold_assert(!is_pass_one
|| eh_frame_sections
.empty());
1740 for (std::vector
<unsigned int>::const_iterator p
= eh_frame_sections
.begin();
1741 p
!= eh_frame_sections
.end();
1744 unsigned int i
= *p
;
1745 const unsigned char* pshdr
;
1746 pshdr
= section_headers_data
+ i
* This::shdr_size
;
1747 typename
This::Shdr
shdr(pshdr
);
1749 this->layout_eh_frame_section(layout
,
1760 // When building a .gdb_index section, scan the .debug_info and
1761 // .debug_types sections.
1762 gold_assert(!is_pass_one
1763 || (debug_info_sections
.empty() && debug_types_sections
.empty()));
1764 for (std::vector
<unsigned int>::const_iterator p
1765 = debug_info_sections
.begin();
1766 p
!= debug_info_sections
.end();
1769 unsigned int i
= *p
;
1770 layout
->add_to_gdb_index(false, this, symbols_data
, symbols_size
,
1771 i
, reloc_shndx
[i
], reloc_type
[i
]);
1773 for (std::vector
<unsigned int>::const_iterator p
1774 = debug_types_sections
.begin();
1775 p
!= debug_types_sections
.end();
1778 unsigned int i
= *p
;
1779 layout
->add_to_gdb_index(true, this, symbols_data
, symbols_size
,
1780 i
, reloc_shndx
[i
], reloc_type
[i
]);
1785 delete[] gc_sd
->section_headers_data
;
1786 delete[] gc_sd
->section_names_data
;
1787 delete[] gc_sd
->symbols_data
;
1788 delete[] gc_sd
->symbol_names_data
;
1789 this->set_symbols_data(NULL
);
1793 delete sd
->section_headers
;
1794 sd
->section_headers
= NULL
;
1795 delete sd
->section_names
;
1796 sd
->section_names
= NULL
;
1800 // Layout sections whose layout was deferred while waiting for
1801 // input files from a plugin.
1803 template<int size
, bool big_endian
>
1805 Sized_relobj_file
<size
, big_endian
>::do_layout_deferred_sections(Layout
* layout
)
1807 typename
std::vector
<Deferred_layout
>::iterator deferred
;
1809 for (deferred
= this->deferred_layout_
.begin();
1810 deferred
!= this->deferred_layout_
.end();
1813 typename
This::Shdr
shdr(deferred
->shdr_data_
);
1814 // If the section is not included, it is because the garbage collector
1815 // decided it is not needed. Avoid reverting that decision.
1816 if (!this->is_section_included(deferred
->shndx_
))
1819 if (parameters
->options().relocatable()
1820 || deferred
->name_
!= ".eh_frame"
1821 || !this->check_eh_frame_flags(&shdr
))
1822 this->layout_section(layout
, deferred
->shndx_
, deferred
->name_
.c_str(),
1823 shdr
, deferred
->reloc_shndx_
,
1824 deferred
->reloc_type_
);
1827 // Reading the symbols again here may be slow.
1828 Read_symbols_data sd
;
1829 this->read_symbols(&sd
);
1830 this->layout_eh_frame_section(layout
,
1833 sd
.symbol_names
->data(),
1834 sd
.symbol_names_size
,
1837 deferred
->reloc_shndx_
,
1838 deferred
->reloc_type_
);
1842 this->deferred_layout_
.clear();
1844 // Now handle the deferred relocation sections.
1846 Output_sections
& out_sections(this->output_sections());
1847 std::vector
<Address
>& out_section_offsets(this->section_offsets());
1849 for (deferred
= this->deferred_layout_relocs_
.begin();
1850 deferred
!= this->deferred_layout_relocs_
.end();
1853 unsigned int shndx
= deferred
->shndx_
;
1854 typename
This::Shdr
shdr(deferred
->shdr_data_
);
1855 unsigned int data_shndx
= this->adjust_shndx(shdr
.get_sh_info());
1857 Output_section
* data_section
= out_sections
[data_shndx
];
1858 if (data_section
== NULL
)
1860 out_sections
[shndx
] = NULL
;
1861 out_section_offsets
[shndx
] = invalid_address
;
1865 Relocatable_relocs
* rr
= new Relocatable_relocs();
1866 this->set_relocatable_relocs(shndx
, rr
);
1868 Output_section
* os
= layout
->layout_reloc(this, shndx
, shdr
,
1870 out_sections
[shndx
] = os
;
1871 out_section_offsets
[shndx
] = invalid_address
;
1875 // Add the symbols to the symbol table.
1877 template<int size
, bool big_endian
>
1879 Sized_relobj_file
<size
, big_endian
>::do_add_symbols(Symbol_table
* symtab
,
1880 Read_symbols_data
* sd
,
1883 if (sd
->symbols
== NULL
)
1885 gold_assert(sd
->symbol_names
== NULL
);
1889 const int sym_size
= This::sym_size
;
1890 size_t symcount
= ((sd
->symbols_size
- sd
->external_symbols_offset
)
1892 if (symcount
* sym_size
!= sd
->symbols_size
- sd
->external_symbols_offset
)
1894 this->error(_("size of symbols is not multiple of symbol size"));
1898 this->symbols_
.resize(symcount
);
1900 const char* sym_names
=
1901 reinterpret_cast<const char*>(sd
->symbol_names
->data());
1902 symtab
->add_from_relobj(this,
1903 sd
->symbols
->data() + sd
->external_symbols_offset
,
1904 symcount
, this->local_symbol_count_
,
1905 sym_names
, sd
->symbol_names_size
,
1907 &this->defined_count_
);
1911 delete sd
->symbol_names
;
1912 sd
->symbol_names
= NULL
;
1915 // Find out if this object, that is a member of a lib group, should be included
1916 // in the link. We check every symbol defined by this object. If the symbol
1917 // table has a strong undefined reference to that symbol, we have to include
1920 template<int size
, bool big_endian
>
1921 Archive::Should_include
1922 Sized_relobj_file
<size
, big_endian
>::do_should_include_member(
1923 Symbol_table
* symtab
,
1925 Read_symbols_data
* sd
,
1928 char* tmpbuf
= NULL
;
1929 size_t tmpbuflen
= 0;
1930 const char* sym_names
=
1931 reinterpret_cast<const char*>(sd
->symbol_names
->data());
1932 const unsigned char* syms
=
1933 sd
->symbols
->data() + sd
->external_symbols_offset
;
1934 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
1935 size_t symcount
= ((sd
->symbols_size
- sd
->external_symbols_offset
)
1938 const unsigned char* p
= syms
;
1940 for (size_t i
= 0; i
< symcount
; ++i
, p
+= sym_size
)
1942 elfcpp::Sym
<size
, big_endian
> sym(p
);
1943 unsigned int st_shndx
= sym
.get_st_shndx();
1944 if (st_shndx
== elfcpp::SHN_UNDEF
)
1947 unsigned int st_name
= sym
.get_st_name();
1948 const char* name
= sym_names
+ st_name
;
1950 Archive::Should_include t
= Archive::should_include_member(symtab
,
1956 if (t
== Archive::SHOULD_INCLUDE_YES
)
1965 return Archive::SHOULD_INCLUDE_UNKNOWN
;
1968 // Iterate over global defined symbols, calling a visitor class V for each.
1970 template<int size
, bool big_endian
>
1972 Sized_relobj_file
<size
, big_endian
>::do_for_all_global_symbols(
1973 Read_symbols_data
* sd
,
1974 Library_base::Symbol_visitor_base
* v
)
1976 const char* sym_names
=
1977 reinterpret_cast<const char*>(sd
->symbol_names
->data());
1978 const unsigned char* syms
=
1979 sd
->symbols
->data() + sd
->external_symbols_offset
;
1980 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
1981 size_t symcount
= ((sd
->symbols_size
- sd
->external_symbols_offset
)
1983 const unsigned char* p
= syms
;
1985 for (size_t i
= 0; i
< symcount
; ++i
, p
+= sym_size
)
1987 elfcpp::Sym
<size
, big_endian
> sym(p
);
1988 if (sym
.get_st_shndx() != elfcpp::SHN_UNDEF
)
1989 v
->visit(sym_names
+ sym
.get_st_name());
1993 // Return whether the local symbol SYMNDX has a PLT offset.
1995 template<int size
, bool big_endian
>
1997 Sized_relobj_file
<size
, big_endian
>::local_has_plt_offset(
1998 unsigned int symndx
) const
2000 typename
Local_plt_offsets::const_iterator p
=
2001 this->local_plt_offsets_
.find(symndx
);
2002 return p
!= this->local_plt_offsets_
.end();
2005 // Get the PLT offset of a local symbol.
2007 template<int size
, bool big_endian
>
2009 Sized_relobj_file
<size
, big_endian
>::do_local_plt_offset(
2010 unsigned int symndx
) const
2012 typename
Local_plt_offsets::const_iterator p
=
2013 this->local_plt_offsets_
.find(symndx
);
2014 gold_assert(p
!= this->local_plt_offsets_
.end());
2018 // Set the PLT offset of a local symbol.
2020 template<int size
, bool big_endian
>
2022 Sized_relobj_file
<size
, big_endian
>::set_local_plt_offset(
2023 unsigned int symndx
, unsigned int plt_offset
)
2025 std::pair
<typename
Local_plt_offsets::iterator
, bool> ins
=
2026 this->local_plt_offsets_
.insert(std::make_pair(symndx
, plt_offset
));
2027 gold_assert(ins
.second
);
2030 // First pass over the local symbols. Here we add their names to
2031 // *POOL and *DYNPOOL, and we store the symbol value in
2032 // THIS->LOCAL_VALUES_. This function is always called from a
2033 // singleton thread. This is followed by a call to
2034 // finalize_local_symbols.
2036 template<int size
, bool big_endian
>
2038 Sized_relobj_file
<size
, big_endian
>::do_count_local_symbols(Stringpool
* pool
,
2039 Stringpool
* dynpool
)
2041 gold_assert(this->symtab_shndx_
!= -1U);
2042 if (this->symtab_shndx_
== 0)
2044 // This object has no symbols. Weird but legal.
2048 // Read the symbol table section header.
2049 const unsigned int symtab_shndx
= this->symtab_shndx_
;
2050 typename
This::Shdr
symtabshdr(this,
2051 this->elf_file_
.section_header(symtab_shndx
));
2052 gold_assert(symtabshdr
.get_sh_type() == elfcpp::SHT_SYMTAB
);
2054 // Read the local symbols.
2055 const int sym_size
= This::sym_size
;
2056 const unsigned int loccount
= this->local_symbol_count_
;
2057 gold_assert(loccount
== symtabshdr
.get_sh_info());
2058 off_t locsize
= loccount
* sym_size
;
2059 const unsigned char* psyms
= this->get_view(symtabshdr
.get_sh_offset(),
2060 locsize
, true, true);
2062 // Read the symbol names.
2063 const unsigned int strtab_shndx
=
2064 this->adjust_shndx(symtabshdr
.get_sh_link());
2065 section_size_type strtab_size
;
2066 const unsigned char* pnamesu
= this->section_contents(strtab_shndx
,
2069 const char* pnames
= reinterpret_cast<const char*>(pnamesu
);
2071 // Loop over the local symbols.
2073 const Output_sections
& out_sections(this->output_sections());
2074 unsigned int shnum
= this->shnum();
2075 unsigned int count
= 0;
2076 unsigned int dyncount
= 0;
2077 // Skip the first, dummy, symbol.
2079 bool strip_all
= parameters
->options().strip_all();
2080 bool discard_all
= parameters
->options().discard_all();
2081 bool discard_locals
= parameters
->options().discard_locals();
2082 for (unsigned int i
= 1; i
< loccount
; ++i
, psyms
+= sym_size
)
2084 elfcpp::Sym
<size
, big_endian
> sym(psyms
);
2086 Symbol_value
<size
>& lv(this->local_values_
[i
]);
2089 unsigned int shndx
= this->adjust_sym_shndx(i
, sym
.get_st_shndx(),
2091 lv
.set_input_shndx(shndx
, is_ordinary
);
2093 if (sym
.get_st_type() == elfcpp::STT_SECTION
)
2094 lv
.set_is_section_symbol();
2095 else if (sym
.get_st_type() == elfcpp::STT_TLS
)
2096 lv
.set_is_tls_symbol();
2097 else if (sym
.get_st_type() == elfcpp::STT_GNU_IFUNC
)
2098 lv
.set_is_ifunc_symbol();
2100 // Save the input symbol value for use in do_finalize_local_symbols().
2101 lv
.set_input_value(sym
.get_st_value());
2103 // Decide whether this symbol should go into the output file.
2105 if ((shndx
< shnum
&& out_sections
[shndx
] == NULL
)
2106 || shndx
== this->discarded_eh_frame_shndx_
)
2108 lv
.set_no_output_symtab_entry();
2109 gold_assert(!lv
.needs_output_dynsym_entry());
2113 if (sym
.get_st_type() == elfcpp::STT_SECTION
2114 || !this->adjust_local_symbol(&lv
))
2116 lv
.set_no_output_symtab_entry();
2117 gold_assert(!lv
.needs_output_dynsym_entry());
2121 if (sym
.get_st_name() >= strtab_size
)
2123 this->error(_("local symbol %u section name out of range: %u >= %u"),
2124 i
, sym
.get_st_name(),
2125 static_cast<unsigned int>(strtab_size
));
2126 lv
.set_no_output_symtab_entry();
2130 const char* name
= pnames
+ sym
.get_st_name();
2132 // If needed, add the symbol to the dynamic symbol table string pool.
2133 if (lv
.needs_output_dynsym_entry())
2135 dynpool
->add(name
, true, NULL
);
2140 || (discard_all
&& lv
.may_be_discarded_from_output_symtab()))
2142 lv
.set_no_output_symtab_entry();
2146 // If --discard-locals option is used, discard all temporary local
2147 // symbols. These symbols start with system-specific local label
2148 // prefixes, typically .L for ELF system. We want to be compatible
2149 // with GNU ld so here we essentially use the same check in
2150 // bfd_is_local_label(). The code is different because we already
2153 // - the symbol is local and thus cannot have global or weak binding.
2154 // - the symbol is not a section symbol.
2155 // - the symbol has a name.
2157 // We do not discard a symbol if it needs a dynamic symbol entry.
2159 && sym
.get_st_type() != elfcpp::STT_FILE
2160 && !lv
.needs_output_dynsym_entry()
2161 && lv
.may_be_discarded_from_output_symtab()
2162 && parameters
->target().is_local_label_name(name
))
2164 lv
.set_no_output_symtab_entry();
2168 // Discard the local symbol if -retain_symbols_file is specified
2169 // and the local symbol is not in that file.
2170 if (!parameters
->options().should_retain_symbol(name
))
2172 lv
.set_no_output_symtab_entry();
2176 // Add the symbol to the symbol table string pool.
2177 pool
->add(name
, true, NULL
);
2181 this->output_local_symbol_count_
= count
;
2182 this->output_local_dynsym_count_
= dyncount
;
2185 // Compute the final value of a local symbol.
2187 template<int size
, bool big_endian
>
2188 typename Sized_relobj_file
<size
, big_endian
>::Compute_final_local_value_status
2189 Sized_relobj_file
<size
, big_endian
>::compute_final_local_value_internal(
2191 const Symbol_value
<size
>* lv_in
,
2192 Symbol_value
<size
>* lv_out
,
2194 const Output_sections
& out_sections
,
2195 const std::vector
<Address
>& out_offsets
,
2196 const Symbol_table
* symtab
)
2198 // We are going to overwrite *LV_OUT, if it has a merged symbol value,
2199 // we may have a memory leak.
2200 gold_assert(lv_out
->has_output_value());
2203 unsigned int shndx
= lv_in
->input_shndx(&is_ordinary
);
2205 // Set the output symbol value.
2209 if (shndx
== elfcpp::SHN_ABS
|| Symbol::is_common_shndx(shndx
))
2210 lv_out
->set_output_value(lv_in
->input_value());
2213 this->error(_("unknown section index %u for local symbol %u"),
2215 lv_out
->set_output_value(0);
2216 return This::CFLV_ERROR
;
2221 if (shndx
>= this->shnum())
2223 this->error(_("local symbol %u section index %u out of range"),
2225 lv_out
->set_output_value(0);
2226 return This::CFLV_ERROR
;
2229 Output_section
* os
= out_sections
[shndx
];
2230 Address secoffset
= out_offsets
[shndx
];
2231 if (symtab
->is_section_folded(this, shndx
))
2233 gold_assert(os
== NULL
&& secoffset
== invalid_address
);
2234 // Get the os of the section it is folded onto.
2235 Section_id folded
= symtab
->icf()->get_folded_section(this,
2237 gold_assert(folded
.first
!= NULL
);
2238 Sized_relobj_file
<size
, big_endian
>* folded_obj
= reinterpret_cast
2239 <Sized_relobj_file
<size
, big_endian
>*>(folded
.first
);
2240 os
= folded_obj
->output_section(folded
.second
);
2241 gold_assert(os
!= NULL
);
2242 secoffset
= folded_obj
->get_output_section_offset(folded
.second
);
2244 // This could be a relaxed input section.
2245 if (secoffset
== invalid_address
)
2247 const Output_relaxed_input_section
* relaxed_section
=
2248 os
->find_relaxed_input_section(folded_obj
, folded
.second
);
2249 gold_assert(relaxed_section
!= NULL
);
2250 secoffset
= relaxed_section
->address() - os
->address();
2256 // This local symbol belongs to a section we are discarding.
2257 // In some cases when applying relocations later, we will
2258 // attempt to match it to the corresponding kept section,
2259 // so we leave the input value unchanged here.
2260 return This::CFLV_DISCARDED
;
2262 else if (secoffset
== invalid_address
)
2266 // This is a SHF_MERGE section or one which otherwise
2267 // requires special handling.
2268 if (shndx
== this->discarded_eh_frame_shndx_
)
2270 // This local symbol belongs to a discarded .eh_frame
2271 // section. Just treat it like the case in which
2272 // os == NULL above.
2273 gold_assert(this->has_eh_frame_
);
2274 return This::CFLV_DISCARDED
;
2276 else if (!lv_in
->is_section_symbol())
2278 // This is not a section symbol. We can determine
2279 // the final value now.
2280 lv_out
->set_output_value(
2281 os
->output_address(this, shndx
, lv_in
->input_value()));
2283 else if (!os
->find_starting_output_address(this, shndx
, &start
))
2285 // This is a section symbol, but apparently not one in a
2286 // merged section. First check to see if this is a relaxed
2287 // input section. If so, use its address. Otherwise just
2288 // use the start of the output section. This happens with
2289 // relocatable links when the input object has section
2290 // symbols for arbitrary non-merge sections.
2291 const Output_section_data
* posd
=
2292 os
->find_relaxed_input_section(this, shndx
);
2295 Address relocatable_link_adjustment
=
2296 relocatable
? os
->address() : 0;
2297 lv_out
->set_output_value(posd
->address()
2298 - relocatable_link_adjustment
);
2301 lv_out
->set_output_value(os
->address());
2305 // We have to consider the addend to determine the
2306 // value to use in a relocation. START is the start
2307 // of this input section. If we are doing a relocatable
2308 // link, use offset from start output section instead of
2310 Address adjusted_start
=
2311 relocatable
? start
- os
->address() : start
;
2312 Merged_symbol_value
<size
>* msv
=
2313 new Merged_symbol_value
<size
>(lv_in
->input_value(),
2315 lv_out
->set_merged_symbol_value(msv
);
2318 else if (lv_in
->is_tls_symbol())
2319 lv_out
->set_output_value(os
->tls_offset()
2321 + lv_in
->input_value());
2323 lv_out
->set_output_value((relocatable
? 0 : os
->address())
2325 + lv_in
->input_value());
2327 return This::CFLV_OK
;
2330 // Compute final local symbol value. R_SYM is the index of a local
2331 // symbol in symbol table. LV points to a symbol value, which is
2332 // expected to hold the input value and to be over-written by the
2333 // final value. SYMTAB points to a symbol table. Some targets may want
2334 // to know would-be-finalized local symbol values in relaxation.
2335 // Hence we provide this method. Since this method updates *LV, a
2336 // callee should make a copy of the original local symbol value and
2337 // use the copy instead of modifying an object's local symbols before
2338 // everything is finalized. The caller should also free up any allocated
2339 // memory in the return value in *LV.
2340 template<int size
, bool big_endian
>
2341 typename Sized_relobj_file
<size
, big_endian
>::Compute_final_local_value_status
2342 Sized_relobj_file
<size
, big_endian
>::compute_final_local_value(
2344 const Symbol_value
<size
>* lv_in
,
2345 Symbol_value
<size
>* lv_out
,
2346 const Symbol_table
* symtab
)
2348 // This is just a wrapper of compute_final_local_value_internal.
2349 const bool relocatable
= parameters
->options().relocatable();
2350 const Output_sections
& out_sections(this->output_sections());
2351 const std::vector
<Address
>& out_offsets(this->section_offsets());
2352 return this->compute_final_local_value_internal(r_sym
, lv_in
, lv_out
,
2353 relocatable
, out_sections
,
2354 out_offsets
, symtab
);
2357 // Finalize the local symbols. Here we set the final value in
2358 // THIS->LOCAL_VALUES_ and set their output symbol table indexes.
2359 // This function is always called from a singleton thread. The actual
2360 // output of the local symbols will occur in a separate task.
2362 template<int size
, bool big_endian
>
2364 Sized_relobj_file
<size
, big_endian
>::do_finalize_local_symbols(
2367 Symbol_table
* symtab
)
2369 gold_assert(off
== static_cast<off_t
>(align_address(off
, size
>> 3)));
2371 const unsigned int loccount
= this->local_symbol_count_
;
2372 this->local_symbol_offset_
= off
;
2374 const bool relocatable
= parameters
->options().relocatable();
2375 const Output_sections
& out_sections(this->output_sections());
2376 const std::vector
<Address
>& out_offsets(this->section_offsets());
2378 for (unsigned int i
= 1; i
< loccount
; ++i
)
2380 Symbol_value
<size
>* lv
= &this->local_values_
[i
];
2382 Compute_final_local_value_status cflv_status
=
2383 this->compute_final_local_value_internal(i
, lv
, lv
, relocatable
,
2384 out_sections
, out_offsets
,
2386 switch (cflv_status
)
2389 if (!lv
->is_output_symtab_index_set())
2391 lv
->set_output_symtab_index(index
);
2395 case CFLV_DISCARDED
:
2406 // Set the output dynamic symbol table indexes for the local variables.
2408 template<int size
, bool big_endian
>
2410 Sized_relobj_file
<size
, big_endian
>::do_set_local_dynsym_indexes(
2413 const unsigned int loccount
= this->local_symbol_count_
;
2414 for (unsigned int i
= 1; i
< loccount
; ++i
)
2416 Symbol_value
<size
>& lv(this->local_values_
[i
]);
2417 if (lv
.needs_output_dynsym_entry())
2419 lv
.set_output_dynsym_index(index
);
2426 // Set the offset where local dynamic symbol information will be stored.
2427 // Returns the count of local symbols contributed to the symbol table by
2430 template<int size
, bool big_endian
>
2432 Sized_relobj_file
<size
, big_endian
>::do_set_local_dynsym_offset(off_t off
)
2434 gold_assert(off
== static_cast<off_t
>(align_address(off
, size
>> 3)));
2435 this->local_dynsym_offset_
= off
;
2436 return this->output_local_dynsym_count_
;
2439 // If Symbols_data is not NULL get the section flags from here otherwise
2440 // get it from the file.
2442 template<int size
, bool big_endian
>
2444 Sized_relobj_file
<size
, big_endian
>::do_section_flags(unsigned int shndx
)
2446 Symbols_data
* sd
= this->get_symbols_data();
2449 const unsigned char* pshdrs
= sd
->section_headers_data
2450 + This::shdr_size
* shndx
;
2451 typename
This::Shdr
shdr(pshdrs
);
2452 return shdr
.get_sh_flags();
2454 // If sd is NULL, read the section header from the file.
2455 return this->elf_file_
.section_flags(shndx
);
2458 // Get the section's ent size from Symbols_data. Called by get_section_contents
2461 template<int size
, bool big_endian
>
2463 Sized_relobj_file
<size
, big_endian
>::do_section_entsize(unsigned int shndx
)
2465 Symbols_data
* sd
= this->get_symbols_data();
2466 gold_assert(sd
!= NULL
);
2468 const unsigned char* pshdrs
= sd
->section_headers_data
2469 + This::shdr_size
* shndx
;
2470 typename
This::Shdr
shdr(pshdrs
);
2471 return shdr
.get_sh_entsize();
2474 // Write out the local symbols.
2476 template<int size
, bool big_endian
>
2478 Sized_relobj_file
<size
, big_endian
>::write_local_symbols(
2480 const Stringpool
* sympool
,
2481 const Stringpool
* dynpool
,
2482 Output_symtab_xindex
* symtab_xindex
,
2483 Output_symtab_xindex
* dynsym_xindex
,
2486 const bool strip_all
= parameters
->options().strip_all();
2489 if (this->output_local_dynsym_count_
== 0)
2491 this->output_local_symbol_count_
= 0;
2494 gold_assert(this->symtab_shndx_
!= -1U);
2495 if (this->symtab_shndx_
== 0)
2497 // This object has no symbols. Weird but legal.
2501 // Read the symbol table section header.
2502 const unsigned int symtab_shndx
= this->symtab_shndx_
;
2503 typename
This::Shdr
symtabshdr(this,
2504 this->elf_file_
.section_header(symtab_shndx
));
2505 gold_assert(symtabshdr
.get_sh_type() == elfcpp::SHT_SYMTAB
);
2506 const unsigned int loccount
= this->local_symbol_count_
;
2507 gold_assert(loccount
== symtabshdr
.get_sh_info());
2509 // Read the local symbols.
2510 const int sym_size
= This::sym_size
;
2511 off_t locsize
= loccount
* sym_size
;
2512 const unsigned char* psyms
= this->get_view(symtabshdr
.get_sh_offset(),
2513 locsize
, true, false);
2515 // Read the symbol names.
2516 const unsigned int strtab_shndx
=
2517 this->adjust_shndx(symtabshdr
.get_sh_link());
2518 section_size_type strtab_size
;
2519 const unsigned char* pnamesu
= this->section_contents(strtab_shndx
,
2522 const char* pnames
= reinterpret_cast<const char*>(pnamesu
);
2524 // Get views into the output file for the portions of the symbol table
2525 // and the dynamic symbol table that we will be writing.
2526 off_t output_size
= this->output_local_symbol_count_
* sym_size
;
2527 unsigned char* oview
= NULL
;
2528 if (output_size
> 0)
2529 oview
= of
->get_output_view(symtab_off
+ this->local_symbol_offset_
,
2532 off_t dyn_output_size
= this->output_local_dynsym_count_
* sym_size
;
2533 unsigned char* dyn_oview
= NULL
;
2534 if (dyn_output_size
> 0)
2535 dyn_oview
= of
->get_output_view(this->local_dynsym_offset_
,
2538 const Output_sections
out_sections(this->output_sections());
2540 gold_assert(this->local_values_
.size() == loccount
);
2542 unsigned char* ov
= oview
;
2543 unsigned char* dyn_ov
= dyn_oview
;
2545 for (unsigned int i
= 1; i
< loccount
; ++i
, psyms
+= sym_size
)
2547 elfcpp::Sym
<size
, big_endian
> isym(psyms
);
2549 Symbol_value
<size
>& lv(this->local_values_
[i
]);
2552 unsigned int st_shndx
= this->adjust_sym_shndx(i
, isym
.get_st_shndx(),
2556 gold_assert(st_shndx
< out_sections
.size());
2557 if (out_sections
[st_shndx
] == NULL
)
2559 st_shndx
= out_sections
[st_shndx
]->out_shndx();
2560 if (st_shndx
>= elfcpp::SHN_LORESERVE
)
2562 if (lv
.has_output_symtab_entry())
2563 symtab_xindex
->add(lv
.output_symtab_index(), st_shndx
);
2564 if (lv
.has_output_dynsym_entry())
2565 dynsym_xindex
->add(lv
.output_dynsym_index(), st_shndx
);
2566 st_shndx
= elfcpp::SHN_XINDEX
;
2570 // Write the symbol to the output symbol table.
2571 if (lv
.has_output_symtab_entry())
2573 elfcpp::Sym_write
<size
, big_endian
> osym(ov
);
2575 gold_assert(isym
.get_st_name() < strtab_size
);
2576 const char* name
= pnames
+ isym
.get_st_name();
2577 osym
.put_st_name(sympool
->get_offset(name
));
2578 osym
.put_st_value(this->local_values_
[i
].value(this, 0));
2579 osym
.put_st_size(isym
.get_st_size());
2580 osym
.put_st_info(isym
.get_st_info());
2581 osym
.put_st_other(isym
.get_st_other());
2582 osym
.put_st_shndx(st_shndx
);
2587 // Write the symbol to the output dynamic symbol table.
2588 if (lv
.has_output_dynsym_entry())
2590 gold_assert(dyn_ov
< dyn_oview
+ dyn_output_size
);
2591 elfcpp::Sym_write
<size
, big_endian
> osym(dyn_ov
);
2593 gold_assert(isym
.get_st_name() < strtab_size
);
2594 const char* name
= pnames
+ isym
.get_st_name();
2595 osym
.put_st_name(dynpool
->get_offset(name
));
2596 osym
.put_st_value(this->local_values_
[i
].value(this, 0));
2597 osym
.put_st_size(isym
.get_st_size());
2598 osym
.put_st_info(isym
.get_st_info());
2599 osym
.put_st_other(isym
.get_st_other());
2600 osym
.put_st_shndx(st_shndx
);
2607 if (output_size
> 0)
2609 gold_assert(ov
- oview
== output_size
);
2610 of
->write_output_view(symtab_off
+ this->local_symbol_offset_
,
2611 output_size
, oview
);
2614 if (dyn_output_size
> 0)
2616 gold_assert(dyn_ov
- dyn_oview
== dyn_output_size
);
2617 of
->write_output_view(this->local_dynsym_offset_
, dyn_output_size
,
2622 // Set *INFO to symbolic information about the offset OFFSET in the
2623 // section SHNDX. Return true if we found something, false if we
2626 template<int size
, bool big_endian
>
2628 Sized_relobj_file
<size
, big_endian
>::get_symbol_location_info(
2631 Symbol_location_info
* info
)
2633 if (this->symtab_shndx_
== 0)
2636 section_size_type symbols_size
;
2637 const unsigned char* symbols
= this->section_contents(this->symtab_shndx_
,
2641 unsigned int symbol_names_shndx
=
2642 this->adjust_shndx(this->section_link(this->symtab_shndx_
));
2643 section_size_type names_size
;
2644 const unsigned char* symbol_names_u
=
2645 this->section_contents(symbol_names_shndx
, &names_size
, false);
2646 const char* symbol_names
= reinterpret_cast<const char*>(symbol_names_u
);
2648 const int sym_size
= This::sym_size
;
2649 const size_t count
= symbols_size
/ sym_size
;
2651 const unsigned char* p
= symbols
;
2652 for (size_t i
= 0; i
< count
; ++i
, p
+= sym_size
)
2654 elfcpp::Sym
<size
, big_endian
> sym(p
);
2656 if (sym
.get_st_type() == elfcpp::STT_FILE
)
2658 if (sym
.get_st_name() >= names_size
)
2659 info
->source_file
= "(invalid)";
2661 info
->source_file
= symbol_names
+ sym
.get_st_name();
2666 unsigned int st_shndx
= this->adjust_sym_shndx(i
, sym
.get_st_shndx(),
2669 && st_shndx
== shndx
2670 && static_cast<off_t
>(sym
.get_st_value()) <= offset
2671 && (static_cast<off_t
>(sym
.get_st_value() + sym
.get_st_size())
2674 if (sym
.get_st_name() > names_size
)
2675 info
->enclosing_symbol_name
= "(invalid)";
2678 info
->enclosing_symbol_name
= symbol_names
+ sym
.get_st_name();
2679 if (parameters
->options().do_demangle())
2681 char* demangled_name
= cplus_demangle(
2682 info
->enclosing_symbol_name
.c_str(),
2683 DMGL_ANSI
| DMGL_PARAMS
);
2684 if (demangled_name
!= NULL
)
2686 info
->enclosing_symbol_name
.assign(demangled_name
);
2687 free(demangled_name
);
2698 // Look for a kept section corresponding to the given discarded section,
2699 // and return its output address. This is used only for relocations in
2700 // debugging sections. If we can't find the kept section, return 0.
2702 template<int size
, bool big_endian
>
2703 typename Sized_relobj_file
<size
, big_endian
>::Address
2704 Sized_relobj_file
<size
, big_endian
>::map_to_kept_section(
2708 Relobj
* kept_object
;
2709 unsigned int kept_shndx
;
2710 if (this->get_kept_comdat_section(shndx
, &kept_object
, &kept_shndx
))
2712 Sized_relobj_file
<size
, big_endian
>* kept_relobj
=
2713 static_cast<Sized_relobj_file
<size
, big_endian
>*>(kept_object
);
2714 Output_section
* os
= kept_relobj
->output_section(kept_shndx
);
2715 Address offset
= kept_relobj
->get_output_section_offset(kept_shndx
);
2716 if (os
!= NULL
&& offset
!= invalid_address
)
2719 return os
->address() + offset
;
2726 // Get symbol counts.
2728 template<int size
, bool big_endian
>
2730 Sized_relobj_file
<size
, big_endian
>::do_get_global_symbol_counts(
2731 const Symbol_table
*,
2735 *defined
= this->defined_count_
;
2737 for (typename
Symbols::const_iterator p
= this->symbols_
.begin();
2738 p
!= this->symbols_
.end();
2741 && (*p
)->source() == Symbol::FROM_OBJECT
2742 && (*p
)->object() == this
2743 && (*p
)->is_defined())
2748 // Return a view of the decompressed contents of a section. Set *PLEN
2749 // to the size. Set *IS_NEW to true if the contents need to be freed
2752 template<int size
, bool big_endian
>
2753 const unsigned char*
2754 Sized_relobj_file
<size
, big_endian
>::do_decompressed_section_contents(
2756 section_size_type
* plen
,
2759 section_size_type buffer_size
;
2760 const unsigned char* buffer
= this->do_section_contents(shndx
, &buffer_size
,
2763 if (this->compressed_sections_
== NULL
)
2765 *plen
= buffer_size
;
2770 Compressed_section_map::const_iterator p
=
2771 this->compressed_sections_
->find(shndx
);
2772 if (p
== this->compressed_sections_
->end())
2774 *plen
= buffer_size
;
2779 section_size_type uncompressed_size
= p
->second
.size
;
2780 if (p
->second
.contents
!= NULL
)
2782 *plen
= uncompressed_size
;
2784 return p
->second
.contents
;
2787 unsigned char* uncompressed_data
= new unsigned char[uncompressed_size
];
2788 if (!decompress_input_section(buffer
,
2792 this->error(_("could not decompress section %s"),
2793 this->do_section_name(shndx
).c_str());
2795 // We could cache the results in p->second.contents and store
2796 // false in *IS_NEW, but build_compressed_section_map() would
2797 // have done so if it had expected it to be profitable. If
2798 // we reach this point, we expect to need the contents only
2799 // once in this pass.
2800 *plen
= uncompressed_size
;
2802 return uncompressed_data
;
2805 // Discard any buffers of uncompressed sections. This is done
2806 // at the end of the Add_symbols task.
2808 template<int size
, bool big_endian
>
2810 Sized_relobj_file
<size
, big_endian
>::do_discard_decompressed_sections()
2812 if (this->compressed_sections_
== NULL
)
2815 for (Compressed_section_map::iterator p
= this->compressed_sections_
->begin();
2816 p
!= this->compressed_sections_
->end();
2819 if (p
->second
.contents
!= NULL
)
2821 delete[] p
->second
.contents
;
2822 p
->second
.contents
= NULL
;
2827 // Input_objects methods.
2829 // Add a regular relocatable object to the list. Return false if this
2830 // object should be ignored.
2833 Input_objects::add_object(Object
* obj
)
2835 // Print the filename if the -t/--trace option is selected.
2836 if (parameters
->options().trace())
2837 gold_info("%s", obj
->name().c_str());
2839 if (!obj
->is_dynamic())
2840 this->relobj_list_
.push_back(static_cast<Relobj
*>(obj
));
2843 // See if this is a duplicate SONAME.
2844 Dynobj
* dynobj
= static_cast<Dynobj
*>(obj
);
2845 const char* soname
= dynobj
->soname();
2847 std::pair
<Unordered_set
<std::string
>::iterator
, bool> ins
=
2848 this->sonames_
.insert(soname
);
2851 // We have already seen a dynamic object with this soname.
2855 this->dynobj_list_
.push_back(dynobj
);
2858 // Add this object to the cross-referencer if requested.
2859 if (parameters
->options().user_set_print_symbol_counts()
2860 || parameters
->options().cref())
2862 if (this->cref_
== NULL
)
2863 this->cref_
= new Cref();
2864 this->cref_
->add_object(obj
);
2870 // For each dynamic object, record whether we've seen all of its
2871 // explicit dependencies.
2874 Input_objects::check_dynamic_dependencies() const
2876 bool issued_copy_dt_needed_error
= false;
2877 for (Dynobj_list::const_iterator p
= this->dynobj_list_
.begin();
2878 p
!= this->dynobj_list_
.end();
2881 const Dynobj::Needed
& needed((*p
)->needed());
2882 bool found_all
= true;
2883 Dynobj::Needed::const_iterator pneeded
;
2884 for (pneeded
= needed
.begin(); pneeded
!= needed
.end(); ++pneeded
)
2886 if (this->sonames_
.find(*pneeded
) == this->sonames_
.end())
2892 (*p
)->set_has_unknown_needed_entries(!found_all
);
2894 // --copy-dt-needed-entries aka --add-needed is a GNU ld option
2895 // that gold does not support. However, they cause no trouble
2896 // unless there is a DT_NEEDED entry that we don't know about;
2897 // warn only in that case.
2899 && !issued_copy_dt_needed_error
2900 && (parameters
->options().copy_dt_needed_entries()
2901 || parameters
->options().add_needed()))
2903 const char* optname
;
2904 if (parameters
->options().copy_dt_needed_entries())
2905 optname
= "--copy-dt-needed-entries";
2907 optname
= "--add-needed";
2908 gold_error(_("%s is not supported but is required for %s in %s"),
2909 optname
, (*pneeded
).c_str(), (*p
)->name().c_str());
2910 issued_copy_dt_needed_error
= true;
2915 // Start processing an archive.
2918 Input_objects::archive_start(Archive
* archive
)
2920 if (parameters
->options().user_set_print_symbol_counts()
2921 || parameters
->options().cref())
2923 if (this->cref_
== NULL
)
2924 this->cref_
= new Cref();
2925 this->cref_
->add_archive_start(archive
);
2929 // Stop processing an archive.
2932 Input_objects::archive_stop(Archive
* archive
)
2934 if (parameters
->options().user_set_print_symbol_counts()
2935 || parameters
->options().cref())
2936 this->cref_
->add_archive_stop(archive
);
2939 // Print symbol counts
2942 Input_objects::print_symbol_counts(const Symbol_table
* symtab
) const
2944 if (parameters
->options().user_set_print_symbol_counts()
2945 && this->cref_
!= NULL
)
2946 this->cref_
->print_symbol_counts(symtab
);
2949 // Print a cross reference table.
2952 Input_objects::print_cref(const Symbol_table
* symtab
, FILE* f
) const
2954 if (parameters
->options().cref() && this->cref_
!= NULL
)
2955 this->cref_
->print_cref(symtab
, f
);
2958 // Relocate_info methods.
2960 // Return a string describing the location of a relocation when file
2961 // and lineno information is not available. This is only used in
2964 template<int size
, bool big_endian
>
2966 Relocate_info
<size
, big_endian
>::location(size_t, off_t offset
) const
2968 Sized_dwarf_line_info
<size
, big_endian
> line_info(this->object
);
2969 std::string ret
= line_info
.addr2line(this->data_shndx
, offset
, NULL
);
2973 ret
= this->object
->name();
2975 Symbol_location_info info
;
2976 if (this->object
->get_symbol_location_info(this->data_shndx
, offset
, &info
))
2978 if (!info
.source_file
.empty())
2981 ret
+= info
.source_file
;
2983 size_t len
= info
.enclosing_symbol_name
.length() + 100;
2984 char* buf
= new char[len
];
2985 snprintf(buf
, len
, _(":function %s"),
2986 info
.enclosing_symbol_name
.c_str());
2993 ret
+= this->object
->section_name(this->data_shndx
);
2995 snprintf(buf
, sizeof buf
, "+0x%lx)", static_cast<long>(offset
));
3000 } // End namespace gold.
3005 using namespace gold
;
3007 // Read an ELF file with the header and return the appropriate
3008 // instance of Object.
3010 template<int size
, bool big_endian
>
3012 make_elf_sized_object(const std::string
& name
, Input_file
* input_file
,
3013 off_t offset
, const elfcpp::Ehdr
<size
, big_endian
>& ehdr
,
3014 bool* punconfigured
)
3016 Target
* target
= select_target(input_file
, offset
,
3017 ehdr
.get_e_machine(), size
, big_endian
,
3018 ehdr
.get_e_ident()[elfcpp::EI_OSABI
],
3019 ehdr
.get_e_ident()[elfcpp::EI_ABIVERSION
]);
3021 gold_fatal(_("%s: unsupported ELF machine number %d"),
3022 name
.c_str(), ehdr
.get_e_machine());
3024 if (!parameters
->target_valid())
3025 set_parameters_target(target
);
3026 else if (target
!= ¶meters
->target())
3028 if (punconfigured
!= NULL
)
3029 *punconfigured
= true;
3031 gold_error(_("%s: incompatible target"), name
.c_str());
3035 return target
->make_elf_object
<size
, big_endian
>(name
, input_file
, offset
,
3039 } // End anonymous namespace.
3044 // Return whether INPUT_FILE is an ELF object.
3047 is_elf_object(Input_file
* input_file
, off_t offset
,
3048 const unsigned char** start
, int* read_size
)
3050 off_t filesize
= input_file
->file().filesize();
3051 int want
= elfcpp::Elf_recognizer::max_header_size
;
3052 if (filesize
- offset
< want
)
3053 want
= filesize
- offset
;
3055 const unsigned char* p
= input_file
->file().get_view(offset
, 0, want
,
3060 return elfcpp::Elf_recognizer::is_elf_file(p
, want
);
3063 // Read an ELF file and return the appropriate instance of Object.
3066 make_elf_object(const std::string
& name
, Input_file
* input_file
, off_t offset
,
3067 const unsigned char* p
, section_offset_type bytes
,
3068 bool* punconfigured
)
3070 if (punconfigured
!= NULL
)
3071 *punconfigured
= false;
3074 bool big_endian
= false;
3076 if (!elfcpp::Elf_recognizer::is_valid_header(p
, bytes
, &size
,
3077 &big_endian
, &error
))
3079 gold_error(_("%s: %s"), name
.c_str(), error
.c_str());
3087 #ifdef HAVE_TARGET_32_BIG
3088 elfcpp::Ehdr
<32, true> ehdr(p
);
3089 return make_elf_sized_object
<32, true>(name
, input_file
,
3090 offset
, ehdr
, punconfigured
);
3092 if (punconfigured
!= NULL
)
3093 *punconfigured
= true;
3095 gold_error(_("%s: not configured to support "
3096 "32-bit big-endian object"),
3103 #ifdef HAVE_TARGET_32_LITTLE
3104 elfcpp::Ehdr
<32, false> ehdr(p
);
3105 return make_elf_sized_object
<32, false>(name
, input_file
,
3106 offset
, ehdr
, punconfigured
);
3108 if (punconfigured
!= NULL
)
3109 *punconfigured
= true;
3111 gold_error(_("%s: not configured to support "
3112 "32-bit little-endian object"),
3118 else if (size
== 64)
3122 #ifdef HAVE_TARGET_64_BIG
3123 elfcpp::Ehdr
<64, true> ehdr(p
);
3124 return make_elf_sized_object
<64, true>(name
, input_file
,
3125 offset
, ehdr
, punconfigured
);
3127 if (punconfigured
!= NULL
)
3128 *punconfigured
= true;
3130 gold_error(_("%s: not configured to support "
3131 "64-bit big-endian object"),
3138 #ifdef HAVE_TARGET_64_LITTLE
3139 elfcpp::Ehdr
<64, false> ehdr(p
);
3140 return make_elf_sized_object
<64, false>(name
, input_file
,
3141 offset
, ehdr
, punconfigured
);
3143 if (punconfigured
!= NULL
)
3144 *punconfigured
= true;
3146 gold_error(_("%s: not configured to support "
3147 "64-bit little-endian object"),
3157 // Instantiate the templates we need.
3159 #ifdef HAVE_TARGET_32_LITTLE
3162 Object::read_section_data
<32, false>(elfcpp::Elf_file
<32, false, Object
>*,
3163 Read_symbols_data
*);
3166 #ifdef HAVE_TARGET_32_BIG
3169 Object::read_section_data
<32, true>(elfcpp::Elf_file
<32, true, Object
>*,
3170 Read_symbols_data
*);
3173 #ifdef HAVE_TARGET_64_LITTLE
3176 Object::read_section_data
<64, false>(elfcpp::Elf_file
<64, false, Object
>*,
3177 Read_symbols_data
*);
3180 #ifdef HAVE_TARGET_64_BIG
3183 Object::read_section_data
<64, true>(elfcpp::Elf_file
<64, true, Object
>*,
3184 Read_symbols_data
*);
3187 #ifdef HAVE_TARGET_32_LITTLE
3189 class Sized_relobj_file
<32, false>;
3192 #ifdef HAVE_TARGET_32_BIG
3194 class Sized_relobj_file
<32, true>;
3197 #ifdef HAVE_TARGET_64_LITTLE
3199 class Sized_relobj_file
<64, false>;
3202 #ifdef HAVE_TARGET_64_BIG
3204 class Sized_relobj_file
<64, true>;
3207 #ifdef HAVE_TARGET_32_LITTLE
3209 struct Relocate_info
<32, false>;
3212 #ifdef HAVE_TARGET_32_BIG
3214 struct Relocate_info
<32, true>;
3217 #ifdef HAVE_TARGET_64_LITTLE
3219 struct Relocate_info
<64, false>;
3222 #ifdef HAVE_TARGET_64_BIG
3224 struct Relocate_info
<64, true>;
3227 #ifdef HAVE_TARGET_32_LITTLE
3230 Xindex::initialize_symtab_xindex
<32, false>(Object
*, unsigned int);
3234 Xindex::read_symtab_xindex
<32, false>(Object
*, unsigned int,
3235 const unsigned char*);
3238 #ifdef HAVE_TARGET_32_BIG
3241 Xindex::initialize_symtab_xindex
<32, true>(Object
*, unsigned int);
3245 Xindex::read_symtab_xindex
<32, true>(Object
*, unsigned int,
3246 const unsigned char*);
3249 #ifdef HAVE_TARGET_64_LITTLE
3252 Xindex::initialize_symtab_xindex
<64, false>(Object
*, unsigned int);
3256 Xindex::read_symtab_xindex
<64, false>(Object
*, unsigned int,
3257 const unsigned char*);
3260 #ifdef HAVE_TARGET_64_BIG
3263 Xindex::initialize_symtab_xindex
<64, true>(Object
*, unsigned int);
3267 Xindex::read_symtab_xindex
<64, true>(Object
*, unsigned int,
3268 const unsigned char*);
3271 } // End namespace gold.