1 // object.h -- support for an object file for linking in gold -*- C++ -*-
3 // Copyright 2006, 2007, 2008 Free Software Foundation, Inc.
4 // Written by Ian Lance Taylor <iant@google.com>.
6 // This file is part of gold.
8 // This program is free software; you can redistribute it and/or modify
9 // it under the terms of the GNU General Public License as published by
10 // the Free Software Foundation; either version 3 of the License, or
11 // (at your option) any later version.
13 // This program is distributed in the hope that it will be useful,
14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 // GNU General Public License for more details.
18 // You should have received a copy of the GNU General Public License
19 // along with this program; if not, write to the Free Software
20 // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 // MA 02110-1301, USA.
30 #include "elfcpp_file.h"
37 class General_options
;
42 class Output_symtab_xindex
;
44 class Object_merge_map
;
45 class Relocatable_relocs
;
47 template<typename Stringpool_char
>
48 class Stringpool_template
;
50 // Data to pass from read_symbols() to add_symbols().
52 struct Read_symbols_data
55 File_view
* section_headers
;
57 File_view
* section_names
;
58 // Size of section name data in bytes.
59 section_size_type section_names_size
;
62 // Size of symbol data in bytes.
63 section_size_type symbols_size
;
64 // Offset of external symbols within symbol data. This structure
65 // sometimes contains only external symbols, in which case this will
66 // be zero. Sometimes it contains all symbols.
67 section_offset_type external_symbols_offset
;
69 File_view
* symbol_names
;
70 // Size of symbol name data in bytes.
71 section_size_type symbol_names_size
;
73 // Version information. This is only used on dynamic objects.
74 // Version symbol data (from SHT_GNU_versym section).
76 section_size_type versym_size
;
77 // Version definition data (from SHT_GNU_verdef section).
79 section_size_type verdef_size
;
80 unsigned int verdef_info
;
81 // Needed version data (from SHT_GNU_verneed section).
83 section_size_type verneed_size
;
84 unsigned int verneed_info
;
87 // Information used to print error messages.
89 struct Symbol_location_info
91 std::string source_file
;
92 std::string enclosing_symbol_name
;
96 // Data about a single relocation section. This is read in
97 // read_relocs and processed in scan_relocs.
101 // Index of reloc section.
102 unsigned int reloc_shndx
;
103 // Index of section that relocs apply to.
104 unsigned int data_shndx
;
105 // Contents of reloc section.
107 // Reloc section type.
108 unsigned int sh_type
;
109 // Number of reloc entries.
112 Output_section
* output_section
;
113 // Whether this section has special handling for offsets.
114 bool needs_special_offset_handling
;
115 // Whether the data section is allocated (has the SHF_ALLOC flag set).
116 bool is_data_section_allocated
;
119 // Relocations in an object file. This is read in read_relocs and
120 // processed in scan_relocs.
122 struct Read_relocs_data
124 typedef std::vector
<Section_relocs
> Relocs_list
;
127 // The local symbols.
128 File_view
* local_symbols
;
131 // The Xindex class manages section indexes for objects with more than
137 Xindex(int large_shndx_offset
)
138 : large_shndx_offset_(large_shndx_offset
), symtab_xindex_()
141 // Initialize the symtab_xindex_ array, given the object and the
142 // section index of the symbol table to use.
143 template<int size
, bool big_endian
>
145 initialize_symtab_xindex(Object
*, unsigned int symtab_shndx
);
147 // Read in the symtab_xindex_ array, given its section index.
148 // PSHDRS may optionally point to the section headers.
149 template<int size
, bool big_endian
>
151 read_symtab_xindex(Object
*, unsigned int xindex_shndx
,
152 const unsigned char* pshdrs
);
154 // Symbol SYMNDX in OBJECT has a section of SHN_XINDEX; return the
155 // real section index.
157 sym_xindex_to_shndx(Object
* object
, unsigned int symndx
);
160 // The type of the array giving the real section index for symbols
161 // whose st_shndx field holds SHN_XINDEX.
162 typedef std::vector
<unsigned int> Symtab_xindex
;
164 // Adjust a section index if necessary. This should only be called
165 // for ordinary section indexes.
167 adjust_shndx(unsigned int shndx
)
169 if (shndx
>= elfcpp::SHN_LORESERVE
)
170 shndx
+= this->large_shndx_offset_
;
174 // Adjust to apply to large section indexes.
175 int large_shndx_offset_
;
176 // The data from the SHT_SYMTAB_SHNDX section.
177 Symtab_xindex symtab_xindex_
;
180 // Object is an abstract base class which represents either a 32-bit
181 // or a 64-bit input object. This can be a regular object file
182 // (ET_REL) or a shared object (ET_DYN).
187 // NAME is the name of the object as we would report it to the user
188 // (e.g., libfoo.a(bar.o) if this is in an archive. INPUT_FILE is
189 // used to read the file. OFFSET is the offset within the input
190 // file--0 for a .o or .so file, something else for a .a file.
191 Object(const std::string
& name
, Input_file
* input_file
, bool is_dynamic
,
193 : name_(name
), input_file_(input_file
), offset_(offset
), shnum_(-1U),
194 is_dynamic_(is_dynamic
), target_(NULL
), xindex_(NULL
)
195 { input_file
->file().add_object(); }
198 { this->input_file_
->file().remove_object(); }
200 // Return the name of the object as we would report it to the tuser.
203 { return this->name_
; }
205 // Get the offset into the file.
208 { return this->offset_
; }
210 // Return whether this is a dynamic object.
213 { return this->is_dynamic_
; }
215 // Return the target structure associated with this object.
218 { return this->target_
; }
220 // Lock the underlying file.
223 { this->input_file()->file().lock(t
); }
225 // Unlock the underlying file.
227 unlock(const Task
* t
)
228 { this->input_file()->file().unlock(t
); }
230 // Return whether the underlying file is locked.
233 { return this->input_file()->file().is_locked(); }
235 // Return the token, so that the task can be queued.
238 { return this->input_file()->file().token(); }
240 // Release the underlying file.
243 { this->input_file_
->file().release(); }
245 // Return whether we should just read symbols from this file.
248 { return this->input_file()->just_symbols(); }
250 // Return the sized target structure associated with this object.
251 // This is like the target method but it returns a pointer of
252 // appropriate checked type.
253 template<int size
, bool big_endian
>
254 Sized_target
<size
, big_endian
>*
255 sized_target() const;
257 // Get the number of sections.
260 { return this->shnum_
; }
262 // Return a view of the contents of a section. Set *PLEN to the
263 // size. CACHE is a hint as in File_read::get_view.
265 section_contents(unsigned int shndx
, section_size_type
* plen
, bool cache
);
267 // Adjust a symbol's section index as needed. SYMNDX is the index
268 // of the symbol and SHNDX is the symbol's section from
269 // get_st_shndx. This returns the section index. It sets
270 // *IS_ORDINARY to indicate whether this is a normal section index,
271 // rather than a special code between SHN_LORESERVE and
274 adjust_sym_shndx(unsigned int symndx
, unsigned int shndx
, bool* is_ordinary
)
276 if (shndx
< elfcpp::SHN_LORESERVE
)
278 else if (shndx
== elfcpp::SHN_XINDEX
)
280 if (this->xindex_
== NULL
)
281 this->xindex_
= this->do_initialize_xindex();
282 shndx
= this->xindex_
->sym_xindex_to_shndx(this, symndx
);
286 *is_ordinary
= false;
290 // Return the size of a section given a section index.
292 section_size(unsigned int shndx
)
293 { return this->do_section_size(shndx
); }
295 // Return the name of a section given a section index.
297 section_name(unsigned int shndx
)
298 { return this->do_section_name(shndx
); }
300 // Return the section flags given a section index.
302 section_flags(unsigned int shndx
)
303 { return this->do_section_flags(shndx
); }
305 // Return the section address given a section index.
307 section_address(unsigned int shndx
)
308 { return this->do_section_address(shndx
); }
310 // Return the section type given a section index.
312 section_type(unsigned int shndx
)
313 { return this->do_section_type(shndx
); }
315 // Return the section link field given a section index.
317 section_link(unsigned int shndx
)
318 { return this->do_section_link(shndx
); }
320 // Return the section info field given a section index.
322 section_info(unsigned int shndx
)
323 { return this->do_section_info(shndx
); }
325 // Return the required section alignment given a section index.
327 section_addralign(unsigned int shndx
)
328 { return this->do_section_addralign(shndx
); }
330 // Read the symbol information.
332 read_symbols(Read_symbols_data
* sd
)
333 { return this->do_read_symbols(sd
); }
335 // Pass sections which should be included in the link to the Layout
336 // object, and record where the sections go in the output file.
338 layout(Symbol_table
* symtab
, Layout
* layout
, Read_symbols_data
* sd
)
339 { this->do_layout(symtab
, layout
, sd
); }
341 // Add symbol information to the global symbol table.
343 add_symbols(Symbol_table
* symtab
, Read_symbols_data
* sd
)
344 { this->do_add_symbols(symtab
, sd
); }
346 // Functions and types for the elfcpp::Elf_file interface. This
347 // permit us to use Object as the File template parameter for
350 // The View class is returned by view. It must support a single
351 // method, data(). This is trivial, because get_view does what we
356 View(const unsigned char* p
)
365 const unsigned char* p_
;
370 view(off_t file_offset
, section_size_type data_size
)
371 { return View(this->get_view(file_offset
, data_size
, true, true)); }
375 error(const char* format
, ...) const ATTRIBUTE_PRINTF_2
;
377 // A location in the file.
383 Location(off_t fo
, section_size_type ds
)
384 : file_offset(fo
), data_size(ds
)
388 // Get a View given a Location.
389 View
view(Location loc
)
390 { return View(this->get_view(loc
.file_offset
, loc
.data_size
, true, true)); }
392 // Get a view into the underlying file.
394 get_view(off_t start
, section_size_type size
, bool aligned
, bool cache
)
396 return this->input_file()->file().get_view(this->offset_
, start
, size
,
400 // Get a lasting view into the underlying file.
402 get_lasting_view(off_t start
, section_size_type size
, bool aligned
,
405 return this->input_file()->file().get_lasting_view(this->offset_
, start
,
406 size
, aligned
, cache
);
409 // Read data from the underlying file.
411 read(off_t start
, section_size_type size
, void* p
) const
412 { this->input_file()->file().read(start
+ this->offset_
, size
, p
); }
414 // Read multiple data from the underlying file.
416 read_multiple(const File_read::Read_multiple
& rm
)
417 { this->input_file()->file().read_multiple(this->offset_
, rm
); }
419 // Stop caching views in the underlying file.
421 clear_view_cache_marks()
422 { this->input_file()->file().clear_view_cache_marks(); }
425 // Read the symbols--implemented by child class.
427 do_read_symbols(Read_symbols_data
*) = 0;
429 // Lay out sections--implemented by child class.
431 do_layout(Symbol_table
*, Layout
*, Read_symbols_data
*) = 0;
433 // Add symbol information to the global symbol table--implemented by
436 do_add_symbols(Symbol_table
*, Read_symbols_data
*) = 0;
438 // Return the location of the contents of a section. Implemented by
441 do_section_contents(unsigned int shndx
) = 0;
443 // Get the size of a section--implemented by child class.
445 do_section_size(unsigned int shndx
) = 0;
447 // Get the name of a section--implemented by child class.
449 do_section_name(unsigned int shndx
) = 0;
451 // Get section flags--implemented by child class.
453 do_section_flags(unsigned int shndx
) = 0;
455 // Get section address--implemented by child class.
457 do_section_address(unsigned int shndx
) = 0;
459 // Get section type--implemented by child class.
461 do_section_type(unsigned int shndx
) = 0;
463 // Get section link field--implemented by child class.
465 do_section_link(unsigned int shndx
) = 0;
467 // Get section info field--implemented by child class.
469 do_section_info(unsigned int shndx
) = 0;
471 // Get section alignment--implemented by child class.
473 do_section_addralign(unsigned int shndx
) = 0;
475 // Return the Xindex structure to use.
477 do_initialize_xindex() = 0;
479 // Get the file. We pass on const-ness.
482 { return this->input_file_
; }
486 { return this->input_file_
; }
490 set_target(int machine
, int size
, bool big_endian
, int osabi
,
493 // Set the number of sections.
496 { this->shnum_
= shnum
; }
498 // Functions used by both Sized_relobj and Sized_dynobj.
500 // Read the section data into a Read_symbols_data object.
501 template<int size
, bool big_endian
>
503 read_section_data(elfcpp::Elf_file
<size
, big_endian
, Object
>*,
506 // Let the child class initialize the xindex object directly.
508 set_xindex(Xindex
* xindex
)
510 gold_assert(this->xindex_
== NULL
);
511 this->xindex_
= xindex
;
514 // If NAME is the name of a special .gnu.warning section, arrange
515 // for the warning to be issued. SHNDX is the section index.
516 // Return whether it is a warning section.
518 handle_gnu_warning_section(const char* name
, unsigned int shndx
,
522 // This class may not be copied.
523 Object(const Object
&);
524 Object
& operator=(const Object
&);
526 // Name of object as printed to user.
528 // For reading the file.
529 Input_file
* input_file_
;
530 // Offset within the file--0 for an object file, non-0 for an
533 // Number of input sections.
535 // Whether this is a dynamic object.
537 // Target functions--may be NULL if the target is not known.
539 // Many sections for objects with more than SHN_LORESERVE sections.
543 // Implement sized_target inline for efficiency. This approach breaks
544 // static type checking, but is made safe using asserts.
546 template<int size
, bool big_endian
>
547 inline Sized_target
<size
, big_endian
>*
548 Object::sized_target() const
550 gold_assert(this->target_
->get_size() == size
);
551 gold_assert(this->target_
->is_big_endian() ? big_endian
: !big_endian
);
552 return static_cast<Sized_target
<size
, big_endian
>*>(this->target_
);
555 // A regular object (ET_REL). This is an abstract base class itself.
556 // The implementation is the template class Sized_relobj.
558 class Relobj
: public Object
561 Relobj(const std::string
& name
, Input_file
* input_file
, off_t offset
= 0)
562 : Object(name
, input_file
, false, offset
),
564 map_to_relocatable_relocs_(NULL
),
565 object_merge_map_(NULL
),
566 relocs_must_follow_section_writes_(false)
571 read_relocs(Read_relocs_data
* rd
)
572 { return this->do_read_relocs(rd
); }
574 // Scan the relocs and adjust the symbol table.
576 scan_relocs(const General_options
& options
, Symbol_table
* symtab
,
577 Layout
* layout
, Read_relocs_data
* rd
)
578 { return this->do_scan_relocs(options
, symtab
, layout
, rd
); }
580 // The number of local symbols in the input symbol table.
582 local_symbol_count() const
583 { return this->do_local_symbol_count(); }
585 // Initial local symbol processing: count the number of local symbols
586 // in the output symbol table and dynamic symbol table; add local symbol
587 // names to *POOL and *DYNPOOL.
589 count_local_symbols(Stringpool_template
<char>* pool
,
590 Stringpool_template
<char>* dynpool
)
591 { return this->do_count_local_symbols(pool
, dynpool
); }
593 // Set the values of the local symbols, set the output symbol table
594 // indexes for the local variables, and set the offset where local
595 // symbol information will be stored. Returns the new local symbol index.
597 finalize_local_symbols(unsigned int index
, off_t off
)
598 { return this->do_finalize_local_symbols(index
, off
); }
600 // Set the output dynamic symbol table indexes for the local variables.
602 set_local_dynsym_indexes(unsigned int index
)
603 { return this->do_set_local_dynsym_indexes(index
); }
605 // Set the offset where local dynamic symbol information will be stored.
607 set_local_dynsym_offset(off_t off
)
608 { return this->do_set_local_dynsym_offset(off
); }
610 // Relocate the input sections and write out the local symbols.
612 relocate(const General_options
& options
, const Symbol_table
* symtab
,
613 const Layout
* layout
, Output_file
* of
)
614 { return this->do_relocate(options
, symtab
, layout
, of
); }
616 // Return whether an input section is being included in the link.
618 is_section_included(unsigned int shndx
) const
620 gold_assert(shndx
< this->output_sections_
.size());
621 return this->output_sections_
[shndx
] != NULL
;
624 // Given a section index, return the corresponding Output_section.
625 // The return value will be NULL if the section is not included in
628 output_section(unsigned int shndx
) const
630 gold_assert(shndx
< this->output_sections_
.size());
631 return this->output_sections_
[shndx
];
634 // Given a section index, return the offset in the Output_section.
635 // The return value will be -1U if the section is specially mapped,
636 // such as a merge section.
638 output_section_offset(unsigned int shndx
) const
639 { return this->do_output_section_offset(shndx
); }
641 // Set the offset of an input section within its output section.
643 set_section_offset(unsigned int shndx
, uint64_t off
)
644 { this->do_set_section_offset(shndx
, off
); }
646 // Return true if we need to wait for output sections to be written
647 // before we can apply relocations. This is true if the object has
648 // any relocations for sections which require special handling, such
649 // as the exception frame section.
651 relocs_must_follow_section_writes() const
652 { return this->relocs_must_follow_section_writes_
; }
654 // Return the object merge map.
657 { return this->object_merge_map_
; }
659 // Set the object merge map.
661 set_merge_map(Object_merge_map
* object_merge_map
)
663 gold_assert(this->object_merge_map_
== NULL
);
664 this->object_merge_map_
= object_merge_map
;
667 // Record the relocatable reloc info for an input reloc section.
669 set_relocatable_relocs(unsigned int reloc_shndx
, Relocatable_relocs
* rr
)
671 gold_assert(reloc_shndx
< this->shnum());
672 (*this->map_to_relocatable_relocs_
)[reloc_shndx
] = rr
;
675 // Get the relocatable reloc info for an input reloc section.
677 relocatable_relocs(unsigned int reloc_shndx
)
679 gold_assert(reloc_shndx
< this->shnum());
680 return (*this->map_to_relocatable_relocs_
)[reloc_shndx
];
684 // The output section to be used for each input section, indexed by
685 // the input section number. The output section is NULL if the
686 // input section is to be discarded.
687 typedef std::vector
<Output_section
*> Output_sections
;
689 // Read the relocs--implemented by child class.
691 do_read_relocs(Read_relocs_data
*) = 0;
693 // Scan the relocs--implemented by child class.
695 do_scan_relocs(const General_options
&, Symbol_table
*, Layout
*,
696 Read_relocs_data
*) = 0;
698 // Return the number of local symbols--implemented by child class.
700 do_local_symbol_count() const = 0;
702 // Count local symbols--implemented by child class.
704 do_count_local_symbols(Stringpool_template
<char>*,
705 Stringpool_template
<char>*) = 0;
707 // Finalize the local symbols. Set the output symbol table indexes
708 // for the local variables, and set the offset where local symbol
709 // information will be stored.
711 do_finalize_local_symbols(unsigned int, off_t
) = 0;
713 // Set the output dynamic symbol table indexes for the local variables.
715 do_set_local_dynsym_indexes(unsigned int) = 0;
717 // Set the offset where local dynamic symbol information will be stored.
719 do_set_local_dynsym_offset(off_t
) = 0;
721 // Relocate the input sections and write out the local
722 // symbols--implemented by child class.
724 do_relocate(const General_options
& options
, const Symbol_table
* symtab
,
725 const Layout
*, Output_file
* of
) = 0;
727 // Get the offset of a section--implemented by child class.
729 do_output_section_offset(unsigned int shndx
) const = 0;
731 // Set the offset of a section--implemented by child class.
733 do_set_section_offset(unsigned int shndx
, uint64_t off
) = 0;
735 // Return the vector mapping input sections to output sections.
738 { return this->output_sections_
; }
740 const Output_sections
&
741 output_sections() const
742 { return this->output_sections_
; }
744 // Set the size of the relocatable relocs array.
746 size_relocatable_relocs()
748 this->map_to_relocatable_relocs_
=
749 new std::vector
<Relocatable_relocs
*>(this->shnum());
752 // Record that we must wait for the output sections to be written
753 // before applying relocations.
755 set_relocs_must_follow_section_writes()
756 { this->relocs_must_follow_section_writes_
= true; }
759 // Mapping from input sections to output section.
760 Output_sections output_sections_
;
761 // Mapping from input section index to the information recorded for
762 // the relocations. This is only used for a relocatable link.
763 std::vector
<Relocatable_relocs
*>* map_to_relocatable_relocs_
;
764 // Mappings for merge sections. This is managed by the code in the
766 Object_merge_map
* object_merge_map_
;
767 // Whether we need to wait for output sections to be written before
768 // we can apply relocations.
769 bool relocs_must_follow_section_writes_
;
772 // This class is used to handle relocations against a section symbol
773 // in an SHF_MERGE section. For such a symbol, we need to know the
774 // addend of the relocation before we can determine the final value.
775 // The addend gives us the location in the input section, and we can
776 // determine how it is mapped to the output section. For a
777 // non-section symbol, we apply the addend to the final value of the
778 // symbol; that is done in finalize_local_symbols, and does not use
782 class Merged_symbol_value
785 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Value
;
787 // We use a hash table to map offsets in the input section to output
789 typedef Unordered_map
<section_offset_type
, Value
> Output_addresses
;
791 Merged_symbol_value(Value input_value
, Value output_start_address
)
792 : input_value_(input_value
), output_start_address_(output_start_address
),
796 // Initialize the hash table.
798 initialize_input_to_output_map(const Relobj
*, unsigned int input_shndx
);
800 // Release the hash table to save space.
802 free_input_to_output_map()
803 { this->output_addresses_
.clear(); }
805 // Get the output value corresponding to an addend. The object and
806 // input section index are passed in because the caller will have
807 // them; otherwise we could store them here.
809 value(const Relobj
* object
, unsigned int input_shndx
, Value addend
) const
811 Value input_offset
= this->input_value_
+ addend
;
812 typename
Output_addresses::const_iterator p
=
813 this->output_addresses_
.find(input_offset
);
814 if (p
!= this->output_addresses_
.end())
817 return this->value_from_output_section(object
, input_shndx
, input_offset
);
821 // Get the output value for an input offset if we couldn't find it
822 // in the hash table.
824 value_from_output_section(const Relobj
*, unsigned int input_shndx
,
825 Value input_offset
) const;
827 // The value of the section symbol in the input file. This is
828 // normally zero, but could in principle be something else.
830 // The start address of this merged section in the output file.
831 Value output_start_address_
;
832 // A hash table which maps offsets in the input section to output
833 // addresses. This only maps specific offsets, not all offsets.
834 Output_addresses output_addresses_
;
837 // This POD class is holds the value of a symbol. This is used for
838 // local symbols, and for all symbols during relocation processing.
839 // For special sections, such as SHF_MERGE sections, this calls a
840 // function to get the final symbol value.
846 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Value
;
849 : output_symtab_index_(0), output_dynsym_index_(-1U), input_shndx_(0),
850 is_ordinary_shndx_(false), is_section_symbol_(false),
851 is_tls_symbol_(false), has_output_value_(true)
852 { this->u_
.value
= 0; }
854 // Get the value of this symbol. OBJECT is the object in which this
855 // symbol is defined, and ADDEND is an addend to add to the value.
856 template<bool big_endian
>
858 value(const Sized_relobj
<size
, big_endian
>* object
, Value addend
) const
860 if (this->has_output_value_
)
861 return this->u_
.value
+ addend
;
864 gold_assert(this->is_ordinary_shndx_
);
865 return this->u_
.merged_symbol_value
->value(object
, this->input_shndx_
,
870 // Set the value of this symbol in the output symbol table.
872 set_output_value(Value value
)
873 { this->u_
.value
= value
; }
875 // For a section symbol in a merged section, we need more
878 set_merged_symbol_value(Merged_symbol_value
<size
>* msv
)
880 gold_assert(this->is_section_symbol_
);
881 this->has_output_value_
= false;
882 this->u_
.merged_symbol_value
= msv
;
885 // Initialize the input to output map for a section symbol in a
886 // merged section. We also initialize the value of a non-section
887 // symbol in a merged section.
889 initialize_input_to_output_map(const Relobj
* object
)
891 if (!this->has_output_value_
)
893 gold_assert(this->is_section_symbol_
&& this->is_ordinary_shndx_
);
894 Merged_symbol_value
<size
>* msv
= this->u_
.merged_symbol_value
;
895 msv
->initialize_input_to_output_map(object
, this->input_shndx_
);
899 // Free the input to output map for a section symbol in a merged
902 free_input_to_output_map()
904 if (!this->has_output_value_
)
905 this->u_
.merged_symbol_value
->free_input_to_output_map();
908 // Set the value of the symbol from the input file. This is only
909 // called by count_local_symbols, to communicate the value to
910 // finalize_local_symbols.
912 set_input_value(Value value
)
913 { this->u_
.value
= value
; }
915 // Return the input value. This is only called by
916 // finalize_local_symbols and (in special cases) relocate_section.
919 { return this->u_
.value
; }
921 // Return whether this symbol should go into the output symbol
924 needs_output_symtab_entry() const
925 { return this->output_symtab_index_
!= -1U; }
927 // Return the index in the output symbol table.
929 output_symtab_index() const
931 gold_assert(this->output_symtab_index_
!= 0);
932 return this->output_symtab_index_
;
935 // Set the index in the output symbol table.
937 set_output_symtab_index(unsigned int i
)
939 gold_assert(this->output_symtab_index_
== 0);
940 this->output_symtab_index_
= i
;
943 // Record that this symbol should not go into the output symbol
946 set_no_output_symtab_entry()
948 gold_assert(this->output_symtab_index_
== 0);
949 this->output_symtab_index_
= -1U;
952 // Set the index in the output dynamic symbol table.
954 set_needs_output_dynsym_entry()
956 gold_assert(!this->is_section_symbol());
957 this->output_dynsym_index_
= 0;
960 // Return whether this symbol should go into the output symbol
963 needs_output_dynsym_entry() const
965 return this->output_dynsym_index_
!= -1U;
968 // Record that this symbol should go into the dynamic symbol table.
970 set_output_dynsym_index(unsigned int i
)
972 gold_assert(this->output_dynsym_index_
== 0);
973 this->output_dynsym_index_
= i
;
976 // Return the index in the output dynamic symbol table.
978 output_dynsym_index() const
980 gold_assert(this->output_dynsym_index_
!= 0
981 && this->output_dynsym_index_
!= -1U);
982 return this->output_dynsym_index_
;
985 // Set the index of the input section in the input file.
987 set_input_shndx(unsigned int i
, bool is_ordinary
)
989 this->input_shndx_
= i
;
990 // input_shndx_ field is a bitfield, so make sure that the value
992 gold_assert(this->input_shndx_
== i
);
993 this->is_ordinary_shndx_
= is_ordinary
;
996 // Return the index of the input section in the input file.
998 input_shndx(bool* is_ordinary
) const
1000 *is_ordinary
= this->is_ordinary_shndx_
;
1001 return this->input_shndx_
;
1004 // Whether this is a section symbol.
1006 is_section_symbol() const
1007 { return this->is_section_symbol_
; }
1009 // Record that this is a section symbol.
1011 set_is_section_symbol()
1013 gold_assert(!this->needs_output_dynsym_entry());
1014 this->is_section_symbol_
= true;
1017 // Record that this is a TLS symbol.
1020 { this->is_tls_symbol_
= true; }
1022 // Return TRUE if this is a TLS symbol.
1024 is_tls_symbol() const
1025 { return this->is_tls_symbol_
; }
1028 // The index of this local symbol in the output symbol table. This
1029 // will be -1 if the symbol should not go into the symbol table.
1030 unsigned int output_symtab_index_
;
1031 // The index of this local symbol in the dynamic symbol table. This
1032 // will be -1 if the symbol should not go into the symbol table.
1033 unsigned int output_dynsym_index_
;
1034 // The section index in the input file in which this symbol is
1036 unsigned int input_shndx_
: 28;
1037 // Whether the section index is an ordinary index, not a special
1039 bool is_ordinary_shndx_
: 1;
1040 // Whether this is a STT_SECTION symbol.
1041 bool is_section_symbol_
: 1;
1042 // Whether this is a STT_TLS symbol.
1043 bool is_tls_symbol_
: 1;
1044 // Whether this symbol has a value for the output file. This is
1045 // normally set to true during Layout::finalize, by
1046 // finalize_local_symbols. It will be false for a section symbol in
1047 // a merge section, as for such symbols we can not determine the
1048 // value to use in a relocation until we see the addend.
1049 bool has_output_value_
: 1;
1052 // This is used if has_output_value_ is true. Between
1053 // count_local_symbols and finalize_local_symbols, this is the
1054 // value in the input file. After finalize_local_symbols, it is
1055 // the value in the output file.
1057 // This is used if has_output_value_ is false. It points to the
1058 // information we need to get the value for a merge section.
1059 Merged_symbol_value
<size
>* merged_symbol_value
;
1063 // A GOT offset list. A symbol may have more than one GOT offset
1064 // (e.g., when mixing modules compiled with two different TLS models),
1065 // but will usually have at most one. GOT_TYPE identifies the type of
1066 // GOT entry; its values are specific to each target.
1068 class Got_offset_list
1072 : got_type_(-1U), got_offset_(0), got_next_(NULL
)
1075 Got_offset_list(unsigned int got_type
, unsigned int got_offset
)
1076 : got_type_(got_type
), got_offset_(got_offset
), got_next_(NULL
)
1081 if (this->got_next_
!= NULL
)
1083 delete this->got_next_
;
1084 this->got_next_
= NULL
;
1088 // Initialize the fields to their default values.
1092 this->got_type_
= -1U;
1093 this->got_offset_
= 0;
1094 this->got_next_
= NULL
;
1097 // Set the offset for the GOT entry of type GOT_TYPE.
1099 set_offset(unsigned int got_type
, unsigned int got_offset
)
1101 if (this->got_type_
== -1U)
1103 this->got_type_
= got_type
;
1104 this->got_offset_
= got_offset
;
1108 for (Got_offset_list
* g
= this; g
!= NULL
; g
= g
->got_next_
)
1110 if (g
->got_type_
== got_type
)
1112 g
->got_offset_
= got_offset
;
1116 Got_offset_list
* g
= new Got_offset_list(got_type
, got_offset
);
1117 g
->got_next_
= this->got_next_
;
1118 this->got_next_
= g
;
1122 // Return the offset for a GOT entry of type GOT_TYPE.
1124 get_offset(unsigned int got_type
) const
1126 for (const Got_offset_list
* g
= this; g
!= NULL
; g
= g
->got_next_
)
1128 if (g
->got_type_
== got_type
)
1129 return g
->got_offset_
;
1135 unsigned int got_type_
;
1136 unsigned int got_offset_
;
1137 Got_offset_list
* got_next_
;
1140 // A regular object file. This is size and endian specific.
1142 template<int size
, bool big_endian
>
1143 class Sized_relobj
: public Relobj
1146 typedef typename
elfcpp::Elf_types
<size
>::Elf_Addr Address
;
1147 typedef std::vector
<Symbol
*> Symbols
;
1148 typedef std::vector
<Symbol_value
<size
> > Local_values
;
1150 Sized_relobj(const std::string
& name
, Input_file
* input_file
, off_t offset
,
1151 const typename
elfcpp::Ehdr
<size
, big_endian
>&);
1155 // Set up the object file based on the ELF header.
1157 setup(const typename
elfcpp::Ehdr
<size
, big_endian
>&);
1159 // Return the number of symbols. This is only valid after
1160 // Object::add_symbols has been called.
1162 symbol_count() const
1163 { return this->local_symbol_count_
+ this->symbols_
.size(); }
1165 // If SYM is the index of a global symbol in the object file's
1166 // symbol table, return the Symbol object. Otherwise, return NULL.
1168 global_symbol(unsigned int sym
) const
1170 if (sym
>= this->local_symbol_count_
)
1172 gold_assert(sym
- this->local_symbol_count_
< this->symbols_
.size());
1173 return this->symbols_
[sym
- this->local_symbol_count_
];
1178 // Return the section index of symbol SYM. Set *VALUE to its value
1179 // in the object file. Set *IS_ORDINARY if this is an ordinary
1180 // section index, not a special code between SHN_LORESERVE and
1181 // SHN_HIRESERVE. Note that for a symbol which is not defined in
1182 // this object file, this will set *VALUE to 0 and return SHN_UNDEF;
1183 // it will not return the final value of the symbol in the link.
1185 symbol_section_and_value(unsigned int sym
, Address
* value
, bool* is_ordinary
);
1187 // Return a pointer to the Symbol_value structure which holds the
1188 // value of a local symbol.
1189 const Symbol_value
<size
>*
1190 local_symbol(unsigned int sym
) const
1192 gold_assert(sym
< this->local_values_
.size());
1193 return &this->local_values_
[sym
];
1196 // Return the index of local symbol SYM in the ordinary symbol
1197 // table. A value of -1U means that the symbol is not being output.
1199 symtab_index(unsigned int sym
) const
1201 gold_assert(sym
< this->local_values_
.size());
1202 return this->local_values_
[sym
].output_symtab_index();
1205 // Return the index of local symbol SYM in the dynamic symbol
1206 // table. A value of -1U means that the symbol is not being output.
1208 dynsym_index(unsigned int sym
) const
1210 gold_assert(sym
< this->local_values_
.size());
1211 return this->local_values_
[sym
].output_dynsym_index();
1214 // Return the input section index of local symbol SYM.
1216 local_symbol_input_shndx(unsigned int sym
, bool* is_ordinary
) const
1218 gold_assert(sym
< this->local_values_
.size());
1219 return this->local_values_
[sym
].input_shndx(is_ordinary
);
1222 // Return the appropriate Sized_target structure.
1223 Sized_target
<size
, big_endian
>*
1225 { return this->Object::sized_target
<size
, big_endian
>(); }
1227 // Record that local symbol SYM needs a dynamic symbol entry.
1229 set_needs_output_dynsym_entry(unsigned int sym
)
1231 gold_assert(sym
< this->local_values_
.size());
1232 this->local_values_
[sym
].set_needs_output_dynsym_entry();
1235 // Return whether the local symbol SYMNDX has a GOT offset.
1236 // For TLS symbols, the GOT entry will hold its tp-relative offset.
1238 local_has_got_offset(unsigned int symndx
, unsigned int got_type
) const
1240 Local_got_offsets::const_iterator p
=
1241 this->local_got_offsets_
.find(symndx
);
1242 return (p
!= this->local_got_offsets_
.end()
1243 && p
->second
->get_offset(got_type
) != -1U);
1246 // Return the GOT offset of the local symbol SYMNDX.
1248 local_got_offset(unsigned int symndx
, unsigned int got_type
) const
1250 Local_got_offsets::const_iterator p
=
1251 this->local_got_offsets_
.find(symndx
);
1252 gold_assert(p
!= this->local_got_offsets_
.end());
1253 unsigned int off
= p
->second
->get_offset(got_type
);
1254 gold_assert(off
!= -1U);
1258 // Set the GOT offset of the local symbol SYMNDX to GOT_OFFSET.
1260 set_local_got_offset(unsigned int symndx
, unsigned int got_type
,
1261 unsigned int got_offset
)
1263 Local_got_offsets::const_iterator p
=
1264 this->local_got_offsets_
.find(symndx
);
1265 if (p
!= this->local_got_offsets_
.end())
1266 p
->second
->set_offset(got_type
, got_offset
);
1269 Got_offset_list
* g
= new Got_offset_list(got_type
, got_offset
);
1270 std::pair
<Local_got_offsets::iterator
, bool> ins
=
1271 this->local_got_offsets_
.insert(std::make_pair(symndx
, g
));
1272 gold_assert(ins
.second
);
1276 // Get the offset of input section SHNDX within its output section.
1277 // This is -1 if the input section requires a special mapping, such
1278 // as a merge section. The output section can be found in the
1279 // output_sections_ field of the parent class Relobj.
1281 get_output_section_offset(unsigned int shndx
) const
1283 gold_assert(shndx
< this->section_offsets_
.size());
1284 return this->section_offsets_
[shndx
];
1287 // Return the name of the symbol that spans the given offset in the
1288 // specified section in this object. This is used only for error
1289 // messages and is not particularly efficient.
1291 get_symbol_location_info(unsigned int shndx
, off_t offset
,
1292 Symbol_location_info
* info
);
1294 // Look for a kept section corresponding to the given discarded section,
1295 // and return its output address. This is used only for relocations in
1296 // debugging sections.
1298 map_to_kept_section(unsigned int shndx
, bool* found
) const;
1301 // Read the symbols.
1303 do_read_symbols(Read_symbols_data
*);
1305 // Return the number of local symbols.
1307 do_local_symbol_count() const
1308 { return this->local_symbol_count_
; }
1310 // Lay out the input sections.
1312 do_layout(Symbol_table
*, Layout
*, Read_symbols_data
*);
1314 // Add the symbols to the symbol table.
1316 do_add_symbols(Symbol_table
*, Read_symbols_data
*);
1320 do_read_relocs(Read_relocs_data
*);
1322 // Scan the relocs and adjust the symbol table.
1324 do_scan_relocs(const General_options
&, Symbol_table
*, Layout
*,
1327 // Count the local symbols.
1329 do_count_local_symbols(Stringpool_template
<char>*,
1330 Stringpool_template
<char>*);
1332 // Finalize the local symbols.
1334 do_finalize_local_symbols(unsigned int, off_t
);
1336 // Set the offset where local dynamic symbol information will be stored.
1338 do_set_local_dynsym_indexes(unsigned int);
1340 // Set the offset where local dynamic symbol information will be stored.
1342 do_set_local_dynsym_offset(off_t
);
1344 // Relocate the input sections and write out the local symbols.
1346 do_relocate(const General_options
& options
, const Symbol_table
* symtab
,
1347 const Layout
*, Output_file
* of
);
1349 // Get the size of a section.
1351 do_section_size(unsigned int shndx
)
1352 { return this->elf_file_
.section_size(shndx
); }
1354 // Get the name of a section.
1356 do_section_name(unsigned int shndx
)
1357 { return this->elf_file_
.section_name(shndx
); }
1359 // Return the location of the contents of a section.
1361 do_section_contents(unsigned int shndx
)
1362 { return this->elf_file_
.section_contents(shndx
); }
1364 // Return section flags.
1366 do_section_flags(unsigned int shndx
)
1367 { return this->elf_file_
.section_flags(shndx
); }
1369 // Return section address.
1371 do_section_address(unsigned int shndx
)
1372 { return this->elf_file_
.section_addr(shndx
); }
1374 // Return section type.
1376 do_section_type(unsigned int shndx
)
1377 { return this->elf_file_
.section_type(shndx
); }
1379 // Return the section link field.
1381 do_section_link(unsigned int shndx
)
1382 { return this->elf_file_
.section_link(shndx
); }
1384 // Return the section info field.
1386 do_section_info(unsigned int shndx
)
1387 { return this->elf_file_
.section_info(shndx
); }
1389 // Return the section alignment.
1391 do_section_addralign(unsigned int shndx
)
1392 { return this->elf_file_
.section_addralign(shndx
); }
1394 // Return the Xindex structure to use.
1396 do_initialize_xindex();
1398 // Get the offset of a section.
1400 do_output_section_offset(unsigned int shndx
) const
1401 { return this->get_output_section_offset(shndx
); }
1403 // Set the offset of a section.
1405 do_set_section_offset(unsigned int shndx
, uint64_t off
)
1407 gold_assert(shndx
< this->section_offsets_
.size());
1408 this->section_offsets_
[shndx
] = convert_types
<Address
, uint64_t>(off
);
1413 typedef Sized_relobj
<size
, big_endian
> This
;
1414 static const int ehdr_size
= elfcpp::Elf_sizes
<size
>::ehdr_size
;
1415 static const int shdr_size
= elfcpp::Elf_sizes
<size
>::shdr_size
;
1416 static const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
1417 typedef elfcpp::Shdr
<size
, big_endian
> Shdr
;
1419 // To keep track of discarded comdat sections, we need to map a member
1420 // section index to the object and section index of the corresponding
1422 struct Kept_comdat_section
1424 Kept_comdat_section(Sized_relobj
<size
, big_endian
>* object
,
1426 : object_(object
), shndx_(shndx
)
1428 Sized_relobj
<size
, big_endian
>* object_
;
1429 unsigned int shndx_
;
1431 typedef std::map
<unsigned int, Kept_comdat_section
*>
1432 Kept_comdat_section_table
;
1434 // Information needed to keep track of kept comdat groups. This is
1435 // simply a map from the section name to its section index. This may
1436 // not be a one-to-one mapping, but we ignore that possibility since
1437 // this is used only to attempt to handle stray relocations from
1438 // non-comdat debug sections that refer to comdat loadable sections.
1439 typedef Unordered_map
<std::string
, unsigned int> Comdat_group
;
1441 // A map from group section index to the table of group members.
1442 typedef std::map
<unsigned int, Comdat_group
*> Comdat_group_table
;
1444 // Find a comdat group table given its group section SHNDX.
1446 find_comdat_group(unsigned int shndx
) const
1448 Comdat_group_table::const_iterator p
=
1449 this->comdat_groups_
.find(shndx
);
1450 if (p
!= this->comdat_groups_
.end())
1455 // Record a new comdat group whose group section index is SHNDX.
1457 add_comdat_group(unsigned int shndx
, Comdat_group
* group
)
1458 { this->comdat_groups_
[shndx
] = group
; }
1460 // Adjust a section index if necessary.
1462 adjust_shndx(unsigned int shndx
)
1464 if (shndx
>= elfcpp::SHN_LORESERVE
)
1465 shndx
+= this->elf_file_
.large_shndx_offset();
1469 // Find the SHT_SYMTAB section, given the section headers.
1471 find_symtab(const unsigned char* pshdrs
);
1473 // Return whether SHDR has the right flags for a GNU style exception
1476 check_eh_frame_flags(const elfcpp::Shdr
<size
, big_endian
>* shdr
) const;
1478 // Return whether there is a section named .eh_frame which might be
1479 // a GNU style exception frame section.
1481 find_eh_frame(const unsigned char* pshdrs
, const char* names
,
1482 section_size_type names_size
) const;
1484 // Whether to include a section group in the link.
1486 include_section_group(Symbol_table
*, Layout
*, unsigned int, const char*,
1487 const unsigned char*, const char *, section_size_type
,
1488 std::vector
<bool>*);
1490 // Whether to include a linkonce section in the link.
1492 include_linkonce_section(Layout
*, unsigned int, const char*,
1493 const elfcpp::Shdr
<size
, big_endian
>&);
1495 // Views and sizes when relocating.
1498 unsigned char* view
;
1499 typename
elfcpp::Elf_types
<size
>::Elf_Addr address
;
1501 section_size_type view_size
;
1502 bool is_input_output_view
;
1503 bool is_postprocessing_view
;
1506 typedef std::vector
<View_size
> Views
;
1508 // Write section data to the output file. Record the views and
1509 // sizes in VIEWS for use when relocating.
1511 write_sections(const unsigned char* pshdrs
, Output_file
*, Views
*);
1513 // Relocate the sections in the output file.
1515 relocate_sections(const General_options
& options
, const Symbol_table
*,
1516 const Layout
*, const unsigned char* pshdrs
, Views
*);
1518 // Scan the input relocations for --emit-relocs.
1520 emit_relocs_scan(const General_options
&, Symbol_table
*, Layout
*,
1521 const unsigned char* plocal_syms
,
1522 const Read_relocs_data::Relocs_list::iterator
&);
1524 // Scan the input relocations for --emit-relocs, templatized on the
1525 // type of the relocation section.
1526 template<int sh_type
>
1528 emit_relocs_scan_reltype(const General_options
&, Symbol_table
*, Layout
*,
1529 const unsigned char* plocal_syms
,
1530 const Read_relocs_data::Relocs_list::iterator
&,
1531 Relocatable_relocs
*);
1533 // Emit the relocs for --emit-relocs.
1535 emit_relocs(const Relocate_info
<size
, big_endian
>*, unsigned int,
1536 unsigned int sh_type
, const unsigned char* prelocs
,
1537 size_t reloc_count
, Output_section
*, Address output_offset
,
1538 unsigned char* view
, Address address
,
1539 section_size_type view_size
,
1540 unsigned char* reloc_view
, section_size_type reloc_view_size
);
1542 // Emit the relocs for --emit-relocs, templatized on the type of the
1543 // relocation section.
1544 template<int sh_type
>
1546 emit_relocs_reltype(const Relocate_info
<size
, big_endian
>*, unsigned int,
1547 const unsigned char* prelocs
, size_t reloc_count
,
1548 Output_section
*, Address output_offset
,
1549 unsigned char* view
, Address address
,
1550 section_size_type view_size
,
1551 unsigned char* reloc_view
,
1552 section_size_type reloc_view_size
);
1554 // Initialize input to output maps for section symbols in merged
1557 initialize_input_to_output_maps();
1559 // Free the input to output maps for section symbols in merged
1562 free_input_to_output_maps();
1564 // Write out the local symbols.
1566 write_local_symbols(Output_file
*,
1567 const Stringpool_template
<char>*,
1568 const Stringpool_template
<char>*,
1569 Output_symtab_xindex
*,
1570 Output_symtab_xindex
*);
1572 // Clear the local symbol information.
1574 clear_local_symbols()
1576 this->local_values_
.clear();
1577 this->local_got_offsets_
.clear();
1580 // Record a mapping from discarded section SHNDX to the corresponding
1583 set_kept_comdat_section(unsigned int shndx
, Kept_comdat_section
* kept
)
1585 this->kept_comdat_sections_
[shndx
] = kept
;
1588 // Find the kept section corresponding to the discarded section SHNDX.
1589 Kept_comdat_section
*
1590 get_kept_comdat_section(unsigned int shndx
) const
1592 typename
Kept_comdat_section_table::const_iterator p
=
1593 this->kept_comdat_sections_
.find(shndx
);
1594 if (p
== this->kept_comdat_sections_
.end())
1599 // The GOT offsets of local symbols. This map also stores GOT offsets
1600 // for tp-relative offsets for TLS symbols.
1601 typedef Unordered_map
<unsigned int, Got_offset_list
*> Local_got_offsets
;
1603 // The TLS GOT offsets of local symbols. The map stores the offsets
1604 // for either a single GOT entry that holds the module index of a TLS
1605 // symbol, or a pair of GOT entries containing the module index and
1606 // dtv-relative offset.
1607 struct Tls_got_entry
1609 Tls_got_entry(int got_offset
, bool have_pair
)
1610 : got_offset_(got_offset
),
1611 have_pair_(have_pair
)
1616 typedef Unordered_map
<unsigned int, Tls_got_entry
> Local_tls_got_offsets
;
1618 // General access to the ELF file.
1619 elfcpp::Elf_file
<size
, big_endian
, Object
> elf_file_
;
1620 // Index of SHT_SYMTAB section.
1621 unsigned int symtab_shndx_
;
1622 // The number of local symbols.
1623 unsigned int local_symbol_count_
;
1624 // The number of local symbols which go into the output file.
1625 unsigned int output_local_symbol_count_
;
1626 // The number of local symbols which go into the output file's dynamic
1628 unsigned int output_local_dynsym_count_
;
1629 // The entries in the symbol table for the external symbols.
1631 // File offset for local symbols.
1632 off_t local_symbol_offset_
;
1633 // File offset for local dynamic symbols.
1634 off_t local_dynsym_offset_
;
1635 // Values of local symbols.
1636 Local_values local_values_
;
1637 // GOT offsets for local non-TLS symbols, and tp-relative offsets
1638 // for TLS symbols, indexed by symbol number.
1639 Local_got_offsets local_got_offsets_
;
1640 // For each input section, the offset of the input section in its
1641 // output section. This is -1U if the input section requires a
1643 std::vector
<Address
> section_offsets_
;
1644 // Table mapping discarded comdat sections to corresponding kept sections.
1645 Kept_comdat_section_table kept_comdat_sections_
;
1646 // Table of kept comdat groups.
1647 Comdat_group_table comdat_groups_
;
1648 // Whether this object has a GNU style .eh_frame section.
1652 // A class to manage the list of all objects.
1658 : relobj_list_(), dynobj_list_(), sonames_(), system_library_directory_()
1661 // The type of the list of input relocateable objects.
1662 typedef std::vector
<Relobj
*> Relobj_list
;
1663 typedef Relobj_list::const_iterator Relobj_iterator
;
1665 // The type of the list of input dynamic objects.
1666 typedef std::vector
<Dynobj
*> Dynobj_list
;
1667 typedef Dynobj_list::const_iterator Dynobj_iterator
;
1669 // Add an object to the list. Return true if all is well, or false
1670 // if this object should be ignored.
1672 add_object(Object
*);
1674 // For each dynamic object, check whether we've seen all of its
1675 // explicit dependencies.
1677 check_dynamic_dependencies() const;
1679 // Return whether an object was found in the system library
1682 found_in_system_library_directory(const Object
*) const;
1684 // Iterate over all regular objects.
1687 relobj_begin() const
1688 { return this->relobj_list_
.begin(); }
1692 { return this->relobj_list_
.end(); }
1694 // Iterate over all dynamic objects.
1697 dynobj_begin() const
1698 { return this->dynobj_list_
.begin(); }
1702 { return this->dynobj_list_
.end(); }
1704 // Return whether we have seen any dynamic objects.
1707 { return !this->dynobj_list_
.empty(); }
1709 // Return the number of input objects.
1711 number_of_input_objects() const
1712 { return this->relobj_list_
.size() + this->dynobj_list_
.size(); }
1715 Input_objects(const Input_objects
&);
1716 Input_objects
& operator=(const Input_objects
&);
1718 // The list of ordinary objects included in the link.
1719 Relobj_list relobj_list_
;
1720 // The list of dynamic objects included in the link.
1721 Dynobj_list dynobj_list_
;
1722 // SONAMEs that we have seen.
1723 Unordered_set
<std::string
> sonames_
;
1724 // The directory in which we find the libc.so.
1725 std::string system_library_directory_
;
1728 // Some of the information we pass to the relocation routines. We
1729 // group this together to avoid passing a dozen different arguments.
1731 template<int size
, bool big_endian
>
1732 struct Relocate_info
1734 // Command line options.
1735 const General_options
* options
;
1737 const Symbol_table
* symtab
;
1739 const Layout
* layout
;
1740 // Object being relocated.
1741 Sized_relobj
<size
, big_endian
>* object
;
1742 // Section index of relocation section.
1743 unsigned int reloc_shndx
;
1744 // Section index of section being relocated.
1745 unsigned int data_shndx
;
1747 // Return a string showing the location of a relocation. This is
1748 // only used for error messages.
1750 location(size_t relnum
, off_t reloffset
) const;
1753 // Return an Object appropriate for the input file. P is BYTES long,
1754 // and holds the ELF header.
1757 make_elf_object(const std::string
& name
, Input_file
*,
1758 off_t offset
, const unsigned char* p
,
1759 section_offset_type bytes
);
1761 } // end namespace gold
1763 #endif // !defined(GOLD_OBJECT_H)