1 // symtab.cc -- the gold symbol table
3 // Copyright 2006, 2007, 2008, 2009, 2010, 2011 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.
35 #include "dwarf_reader.h"
39 #include "workqueue.h"
49 // Initialize fields in Symbol. This initializes everything except u_
53 Symbol::init_fields(const char* name
, const char* version
,
54 elfcpp::STT type
, elfcpp::STB binding
,
55 elfcpp::STV visibility
, unsigned char nonvis
)
58 this->version_
= version
;
59 this->symtab_index_
= 0;
60 this->dynsym_index_
= 0;
61 this->got_offsets_
.init();
62 this->plt_offset_
= -1U;
64 this->binding_
= binding
;
65 this->visibility_
= visibility
;
66 this->nonvis_
= nonvis
;
67 this->is_def_
= false;
68 this->is_forwarder_
= false;
69 this->has_alias_
= false;
70 this->needs_dynsym_entry_
= false;
71 this->in_reg_
= false;
72 this->in_dyn_
= false;
73 this->has_warning_
= false;
74 this->is_copied_from_dynobj_
= false;
75 this->is_forced_local_
= false;
76 this->is_ordinary_shndx_
= false;
77 this->in_real_elf_
= false;
78 this->is_defined_in_discarded_section_
= false;
79 this->undef_binding_set_
= false;
80 this->undef_binding_weak_
= false;
83 // Return the demangled version of the symbol's name, but only
84 // if the --demangle flag was set.
87 demangle(const char* name
)
89 if (!parameters
->options().do_demangle())
92 // cplus_demangle allocates memory for the result it returns,
93 // and returns NULL if the name is already demangled.
94 char* demangled_name
= cplus_demangle(name
, DMGL_ANSI
| DMGL_PARAMS
);
95 if (demangled_name
== NULL
)
98 std::string
retval(demangled_name
);
104 Symbol::demangled_name() const
106 return demangle(this->name());
109 // Initialize the fields in the base class Symbol for SYM in OBJECT.
111 template<int size
, bool big_endian
>
113 Symbol::init_base_object(const char* name
, const char* version
, Object
* object
,
114 const elfcpp::Sym
<size
, big_endian
>& sym
,
115 unsigned int st_shndx
, bool is_ordinary
)
117 this->init_fields(name
, version
, sym
.get_st_type(), sym
.get_st_bind(),
118 sym
.get_st_visibility(), sym
.get_st_nonvis());
119 this->u_
.from_object
.object
= object
;
120 this->u_
.from_object
.shndx
= st_shndx
;
121 this->is_ordinary_shndx_
= is_ordinary
;
122 this->source_
= FROM_OBJECT
;
123 this->in_reg_
= !object
->is_dynamic();
124 this->in_dyn_
= object
->is_dynamic();
125 this->in_real_elf_
= object
->pluginobj() == NULL
;
128 // Initialize the fields in the base class Symbol for a symbol defined
129 // in an Output_data.
132 Symbol::init_base_output_data(const char* name
, const char* version
,
133 Output_data
* od
, elfcpp::STT type
,
134 elfcpp::STB binding
, elfcpp::STV visibility
,
135 unsigned char nonvis
, bool offset_is_from_end
)
137 this->init_fields(name
, version
, type
, binding
, visibility
, nonvis
);
138 this->u_
.in_output_data
.output_data
= od
;
139 this->u_
.in_output_data
.offset_is_from_end
= offset_is_from_end
;
140 this->source_
= IN_OUTPUT_DATA
;
141 this->in_reg_
= true;
142 this->in_real_elf_
= true;
145 // Initialize the fields in the base class Symbol for a symbol defined
146 // in an Output_segment.
149 Symbol::init_base_output_segment(const char* name
, const char* version
,
150 Output_segment
* os
, elfcpp::STT type
,
151 elfcpp::STB binding
, elfcpp::STV visibility
,
152 unsigned char nonvis
,
153 Segment_offset_base offset_base
)
155 this->init_fields(name
, version
, type
, binding
, visibility
, nonvis
);
156 this->u_
.in_output_segment
.output_segment
= os
;
157 this->u_
.in_output_segment
.offset_base
= offset_base
;
158 this->source_
= IN_OUTPUT_SEGMENT
;
159 this->in_reg_
= true;
160 this->in_real_elf_
= true;
163 // Initialize the fields in the base class Symbol for a symbol defined
167 Symbol::init_base_constant(const char* name
, const char* version
,
168 elfcpp::STT type
, elfcpp::STB binding
,
169 elfcpp::STV visibility
, unsigned char nonvis
)
171 this->init_fields(name
, version
, type
, binding
, visibility
, nonvis
);
172 this->source_
= IS_CONSTANT
;
173 this->in_reg_
= true;
174 this->in_real_elf_
= true;
177 // Initialize the fields in the base class Symbol for an undefined
181 Symbol::init_base_undefined(const char* name
, const char* version
,
182 elfcpp::STT type
, elfcpp::STB binding
,
183 elfcpp::STV visibility
, unsigned char nonvis
)
185 this->init_fields(name
, version
, type
, binding
, visibility
, nonvis
);
186 this->dynsym_index_
= -1U;
187 this->source_
= IS_UNDEFINED
;
188 this->in_reg_
= true;
189 this->in_real_elf_
= true;
192 // Allocate a common symbol in the base.
195 Symbol::allocate_base_common(Output_data
* od
)
197 gold_assert(this->is_common());
198 this->source_
= IN_OUTPUT_DATA
;
199 this->u_
.in_output_data
.output_data
= od
;
200 this->u_
.in_output_data
.offset_is_from_end
= false;
203 // Initialize the fields in Sized_symbol for SYM in OBJECT.
206 template<bool big_endian
>
208 Sized_symbol
<size
>::init_object(const char* name
, const char* version
,
210 const elfcpp::Sym
<size
, big_endian
>& sym
,
211 unsigned int st_shndx
, bool is_ordinary
)
213 this->init_base_object(name
, version
, object
, sym
, st_shndx
, is_ordinary
);
214 this->value_
= sym
.get_st_value();
215 this->symsize_
= sym
.get_st_size();
218 // Initialize the fields in Sized_symbol for a symbol defined in an
223 Sized_symbol
<size
>::init_output_data(const char* name
, const char* version
,
224 Output_data
* od
, Value_type value
,
225 Size_type symsize
, elfcpp::STT type
,
227 elfcpp::STV visibility
,
228 unsigned char nonvis
,
229 bool offset_is_from_end
)
231 this->init_base_output_data(name
, version
, od
, type
, binding
, visibility
,
232 nonvis
, offset_is_from_end
);
233 this->value_
= value
;
234 this->symsize_
= symsize
;
237 // Initialize the fields in Sized_symbol for a symbol defined in an
242 Sized_symbol
<size
>::init_output_segment(const char* name
, const char* version
,
243 Output_segment
* os
, Value_type value
,
244 Size_type symsize
, elfcpp::STT type
,
246 elfcpp::STV visibility
,
247 unsigned char nonvis
,
248 Segment_offset_base offset_base
)
250 this->init_base_output_segment(name
, version
, os
, type
, binding
, visibility
,
251 nonvis
, offset_base
);
252 this->value_
= value
;
253 this->symsize_
= symsize
;
256 // Initialize the fields in Sized_symbol for a symbol defined as a
261 Sized_symbol
<size
>::init_constant(const char* name
, const char* version
,
262 Value_type value
, Size_type symsize
,
263 elfcpp::STT type
, elfcpp::STB binding
,
264 elfcpp::STV visibility
, unsigned char nonvis
)
266 this->init_base_constant(name
, version
, type
, binding
, visibility
, nonvis
);
267 this->value_
= value
;
268 this->symsize_
= symsize
;
271 // Initialize the fields in Sized_symbol for an undefined symbol.
275 Sized_symbol
<size
>::init_undefined(const char* name
, const char* version
,
276 elfcpp::STT type
, elfcpp::STB binding
,
277 elfcpp::STV visibility
, unsigned char nonvis
)
279 this->init_base_undefined(name
, version
, type
, binding
, visibility
, nonvis
);
284 // Return true if SHNDX represents a common symbol.
287 Symbol::is_common_shndx(unsigned int shndx
)
289 return (shndx
== elfcpp::SHN_COMMON
290 || shndx
== parameters
->target().small_common_shndx()
291 || shndx
== parameters
->target().large_common_shndx());
294 // Allocate a common symbol.
298 Sized_symbol
<size
>::allocate_common(Output_data
* od
, Value_type value
)
300 this->allocate_base_common(od
);
301 this->value_
= value
;
304 // The ""'s around str ensure str is a string literal, so sizeof works.
305 #define strprefix(var, str) (strncmp(var, str, sizeof("" str "") - 1) == 0)
307 // Return true if this symbol should be added to the dynamic symbol
311 Symbol::should_add_dynsym_entry(Symbol_table
* symtab
) const
313 // If the symbol is used by a dynamic relocation, we need to add it.
314 if (this->needs_dynsym_entry())
317 // If this symbol's section is not added, the symbol need not be added.
318 // The section may have been GCed. Note that export_dynamic is being
319 // overridden here. This should not be done for shared objects.
320 if (parameters
->options().gc_sections()
321 && !parameters
->options().shared()
322 && this->source() == Symbol::FROM_OBJECT
323 && !this->object()->is_dynamic())
325 Relobj
* relobj
= static_cast<Relobj
*>(this->object());
327 unsigned int shndx
= this->shndx(&is_ordinary
);
328 if (is_ordinary
&& shndx
!= elfcpp::SHN_UNDEF
329 && !relobj
->is_section_included(shndx
)
330 && !symtab
->is_section_folded(relobj
, shndx
))
334 // If the symbol was forced local in a version script, do not add it.
335 if (this->is_forced_local())
338 // If the symbol was forced dynamic in a --dynamic-list file, add it.
339 if (parameters
->options().in_dynamic_list(this->name()))
342 // If dynamic-list-data was specified, add any STT_OBJECT.
343 if (parameters
->options().dynamic_list_data()
344 && !this->is_from_dynobj()
345 && this->type() == elfcpp::STT_OBJECT
)
348 // If --dynamic-list-cpp-new was specified, add any new/delete symbol.
349 // If --dynamic-list-cpp-typeinfo was specified, add any typeinfo symbols.
350 if ((parameters
->options().dynamic_list_cpp_new()
351 || parameters
->options().dynamic_list_cpp_typeinfo())
352 && !this->is_from_dynobj())
354 // TODO(csilvers): We could probably figure out if we're an operator
355 // new/delete or typeinfo without the need to demangle.
356 char* demangled_name
= cplus_demangle(this->name(),
357 DMGL_ANSI
| DMGL_PARAMS
);
358 if (demangled_name
== NULL
)
360 // Not a C++ symbol, so it can't satisfy these flags
362 else if (parameters
->options().dynamic_list_cpp_new()
363 && (strprefix(demangled_name
, "operator new")
364 || strprefix(demangled_name
, "operator delete")))
366 free(demangled_name
);
369 else if (parameters
->options().dynamic_list_cpp_typeinfo()
370 && (strprefix(demangled_name
, "typeinfo name for")
371 || strprefix(demangled_name
, "typeinfo for")))
373 free(demangled_name
);
377 free(demangled_name
);
380 // If exporting all symbols or building a shared library,
381 // and the symbol is defined in a regular object and is
382 // externally visible, we need to add it.
383 if ((parameters
->options().export_dynamic() || parameters
->options().shared())
384 && !this->is_from_dynobj()
385 && this->is_externally_visible())
391 // Return true if the final value of this symbol is known at link
395 Symbol::final_value_is_known() const
397 // If we are not generating an executable, then no final values are
398 // known, since they will change at runtime.
399 if (parameters
->options().output_is_position_independent()
400 || parameters
->options().relocatable())
403 // If the symbol is not from an object file, and is not undefined,
404 // then it is defined, and known.
405 if (this->source_
!= FROM_OBJECT
)
407 if (this->source_
!= IS_UNDEFINED
)
412 // If the symbol is from a dynamic object, then the final value
414 if (this->object()->is_dynamic())
417 // If the symbol is not undefined (it is defined or common),
418 // then the final value is known.
419 if (!this->is_undefined())
423 // If the symbol is undefined, then whether the final value is known
424 // depends on whether we are doing a static link. If we are doing a
425 // dynamic link, then the final value could be filled in at runtime.
426 // This could reasonably be the case for a weak undefined symbol.
427 return parameters
->doing_static_link();
430 // Return the output section where this symbol is defined.
433 Symbol::output_section() const
435 switch (this->source_
)
439 unsigned int shndx
= this->u_
.from_object
.shndx
;
440 if (shndx
!= elfcpp::SHN_UNDEF
&& this->is_ordinary_shndx_
)
442 gold_assert(!this->u_
.from_object
.object
->is_dynamic());
443 gold_assert(this->u_
.from_object
.object
->pluginobj() == NULL
);
444 Relobj
* relobj
= static_cast<Relobj
*>(this->u_
.from_object
.object
);
445 return relobj
->output_section(shndx
);
451 return this->u_
.in_output_data
.output_data
->output_section();
453 case IN_OUTPUT_SEGMENT
:
463 // Set the symbol's output section. This is used for symbols defined
464 // in scripts. This should only be called after the symbol table has
468 Symbol::set_output_section(Output_section
* os
)
470 switch (this->source_
)
474 gold_assert(this->output_section() == os
);
477 this->source_
= IN_OUTPUT_DATA
;
478 this->u_
.in_output_data
.output_data
= os
;
479 this->u_
.in_output_data
.offset_is_from_end
= false;
481 case IN_OUTPUT_SEGMENT
:
488 // Class Symbol_table.
490 Symbol_table::Symbol_table(unsigned int count
,
491 const Version_script_info
& version_script
)
492 : saw_undefined_(0), offset_(0), table_(count
), namepool_(),
493 forwarders_(), commons_(), tls_commons_(), small_commons_(),
494 large_commons_(), forced_locals_(), warnings_(),
495 version_script_(version_script
), gc_(NULL
), icf_(NULL
)
497 namepool_
.reserve(count
);
500 Symbol_table::~Symbol_table()
504 // The symbol table key equality function. This is called with
508 Symbol_table::Symbol_table_eq::operator()(const Symbol_table_key
& k1
,
509 const Symbol_table_key
& k2
) const
511 return k1
.first
== k2
.first
&& k1
.second
== k2
.second
;
515 Symbol_table::is_section_folded(Object
* obj
, unsigned int shndx
) const
517 return (parameters
->options().icf_enabled()
518 && this->icf_
->is_section_folded(obj
, shndx
));
521 // For symbols that have been listed with -u option, add them to the
522 // work list to avoid gc'ing them.
525 Symbol_table::gc_mark_undef_symbols(Layout
* layout
)
527 for (options::String_set::const_iterator p
=
528 parameters
->options().undefined_begin();
529 p
!= parameters
->options().undefined_end();
532 const char* name
= p
->c_str();
533 Symbol
* sym
= this->lookup(name
);
534 gold_assert(sym
!= NULL
);
535 if (sym
->source() == Symbol::FROM_OBJECT
536 && !sym
->object()->is_dynamic())
538 Relobj
* obj
= static_cast<Relobj
*>(sym
->object());
540 unsigned int shndx
= sym
->shndx(&is_ordinary
);
543 gold_assert(this->gc_
!= NULL
);
544 this->gc_
->worklist().push(Section_id(obj
, shndx
));
549 for (Script_options::referenced_const_iterator p
=
550 layout
->script_options()->referenced_begin();
551 p
!= layout
->script_options()->referenced_end();
554 Symbol
* sym
= this->lookup(p
->c_str());
555 gold_assert(sym
!= NULL
);
556 if (sym
->source() == Symbol::FROM_OBJECT
557 && !sym
->object()->is_dynamic())
559 Relobj
* obj
= static_cast<Relobj
*>(sym
->object());
561 unsigned int shndx
= sym
->shndx(&is_ordinary
);
564 gold_assert(this->gc_
!= NULL
);
565 this->gc_
->worklist().push(Section_id(obj
, shndx
));
572 Symbol_table::gc_mark_symbol_for_shlib(Symbol
* sym
)
574 if (!sym
->is_from_dynobj()
575 && sym
->is_externally_visible())
577 //Add the object and section to the work list.
578 Relobj
* obj
= static_cast<Relobj
*>(sym
->object());
580 unsigned int shndx
= sym
->shndx(&is_ordinary
);
581 if (is_ordinary
&& shndx
!= elfcpp::SHN_UNDEF
)
583 gold_assert(this->gc_
!= NULL
);
584 this->gc_
->worklist().push(Section_id(obj
, shndx
));
589 // When doing garbage collection, keep symbols that have been seen in
592 Symbol_table::gc_mark_dyn_syms(Symbol
* sym
)
594 if (sym
->in_dyn() && sym
->source() == Symbol::FROM_OBJECT
595 && !sym
->object()->is_dynamic())
597 Relobj
* obj
= static_cast<Relobj
*>(sym
->object());
599 unsigned int shndx
= sym
->shndx(&is_ordinary
);
600 if (is_ordinary
&& shndx
!= elfcpp::SHN_UNDEF
)
602 gold_assert(this->gc_
!= NULL
);
603 this->gc_
->worklist().push(Section_id(obj
, shndx
));
608 // Make TO a symbol which forwards to FROM.
611 Symbol_table::make_forwarder(Symbol
* from
, Symbol
* to
)
613 gold_assert(from
!= to
);
614 gold_assert(!from
->is_forwarder() && !to
->is_forwarder());
615 this->forwarders_
[from
] = to
;
616 from
->set_forwarder();
619 // Resolve the forwards from FROM, returning the real symbol.
622 Symbol_table::resolve_forwards(const Symbol
* from
) const
624 gold_assert(from
->is_forwarder());
625 Unordered_map
<const Symbol
*, Symbol
*>::const_iterator p
=
626 this->forwarders_
.find(from
);
627 gold_assert(p
!= this->forwarders_
.end());
631 // Look up a symbol by name.
634 Symbol_table::lookup(const char* name
, const char* version
) const
636 Stringpool::Key name_key
;
637 name
= this->namepool_
.find(name
, &name_key
);
641 Stringpool::Key version_key
= 0;
644 version
= this->namepool_
.find(version
, &version_key
);
649 Symbol_table_key
key(name_key
, version_key
);
650 Symbol_table::Symbol_table_type::const_iterator p
= this->table_
.find(key
);
651 if (p
== this->table_
.end())
656 // Resolve a Symbol with another Symbol. This is only used in the
657 // unusual case where there are references to both an unversioned
658 // symbol and a symbol with a version, and we then discover that that
659 // version is the default version. Because this is unusual, we do
660 // this the slow way, by converting back to an ELF symbol.
662 template<int size
, bool big_endian
>
664 Symbol_table::resolve(Sized_symbol
<size
>* to
, const Sized_symbol
<size
>* from
)
666 unsigned char buf
[elfcpp::Elf_sizes
<size
>::sym_size
];
667 elfcpp::Sym_write
<size
, big_endian
> esym(buf
);
668 // We don't bother to set the st_name or the st_shndx field.
669 esym
.put_st_value(from
->value());
670 esym
.put_st_size(from
->symsize());
671 esym
.put_st_info(from
->binding(), from
->type());
672 esym
.put_st_other(from
->visibility(), from
->nonvis());
674 unsigned int shndx
= from
->shndx(&is_ordinary
);
675 this->resolve(to
, esym
.sym(), shndx
, is_ordinary
, shndx
, from
->object(),
681 if (parameters
->options().gc_sections())
682 this->gc_mark_dyn_syms(to
);
685 // Record that a symbol is forced to be local by a version script or
689 Symbol_table::force_local(Symbol
* sym
)
691 if (!sym
->is_defined() && !sym
->is_common())
693 if (sym
->is_forced_local())
695 // We already got this one.
698 sym
->set_is_forced_local();
699 this->forced_locals_
.push_back(sym
);
702 // Adjust NAME for wrapping, and update *NAME_KEY if necessary. This
703 // is only called for undefined symbols, when at least one --wrap
707 Symbol_table::wrap_symbol(const char* name
, Stringpool::Key
* name_key
)
709 // For some targets, we need to ignore a specific character when
710 // wrapping, and add it back later.
712 if (name
[0] == parameters
->target().wrap_char())
718 if (parameters
->options().is_wrap(name
))
720 // Turn NAME into __wrap_NAME.
727 // This will give us both the old and new name in NAMEPOOL_, but
728 // that is OK. Only the versions we need will wind up in the
729 // real string table in the output file.
730 return this->namepool_
.add(s
.c_str(), true, name_key
);
733 const char* const real_prefix
= "__real_";
734 const size_t real_prefix_length
= strlen(real_prefix
);
735 if (strncmp(name
, real_prefix
, real_prefix_length
) == 0
736 && parameters
->options().is_wrap(name
+ real_prefix_length
))
738 // Turn __real_NAME into NAME.
742 s
+= name
+ real_prefix_length
;
743 return this->namepool_
.add(s
.c_str(), true, name_key
);
749 // This is called when we see a symbol NAME/VERSION, and the symbol
750 // already exists in the symbol table, and VERSION is marked as being
751 // the default version. SYM is the NAME/VERSION symbol we just added.
752 // DEFAULT_IS_NEW is true if this is the first time we have seen the
753 // symbol NAME/NULL. PDEF points to the entry for NAME/NULL.
755 template<int size
, bool big_endian
>
757 Symbol_table::define_default_version(Sized_symbol
<size
>* sym
,
759 Symbol_table_type::iterator pdef
)
763 // This is the first time we have seen NAME/NULL. Make
764 // NAME/NULL point to NAME/VERSION, and mark SYM as the default
767 sym
->set_is_default();
769 else if (pdef
->second
== sym
)
771 // NAME/NULL already points to NAME/VERSION. Don't mark the
772 // symbol as the default if it is not already the default.
776 // This is the unfortunate case where we already have entries
777 // for both NAME/VERSION and NAME/NULL. We now see a symbol
778 // NAME/VERSION where VERSION is the default version. We have
779 // already resolved this new symbol with the existing
780 // NAME/VERSION symbol.
782 // It's possible that NAME/NULL and NAME/VERSION are both
783 // defined in regular objects. This can only happen if one
784 // object file defines foo and another defines foo@@ver. This
785 // is somewhat obscure, but we call it a multiple definition
788 // It's possible that NAME/NULL actually has a version, in which
789 // case it won't be the same as VERSION. This happens with
790 // ver_test_7.so in the testsuite for the symbol t2_2. We see
791 // t2_2@@VER2, so we define both t2_2/VER2 and t2_2/NULL. We
792 // then see an unadorned t2_2 in an object file and give it
793 // version VER1 from the version script. This looks like a
794 // default definition for VER1, so it looks like we should merge
795 // t2_2/NULL with t2_2/VER1. That doesn't make sense, but it's
796 // not obvious that this is an error, either. So we just punt.
798 // If one of the symbols has non-default visibility, and the
799 // other is defined in a shared object, then they are different
802 // Otherwise, we just resolve the symbols as though they were
805 if (pdef
->second
->version() != NULL
)
806 gold_assert(pdef
->second
->version() != sym
->version());
807 else if (sym
->visibility() != elfcpp::STV_DEFAULT
808 && pdef
->second
->is_from_dynobj())
810 else if (pdef
->second
->visibility() != elfcpp::STV_DEFAULT
811 && sym
->is_from_dynobj())
815 const Sized_symbol
<size
>* symdef
;
816 symdef
= this->get_sized_symbol
<size
>(pdef
->second
);
817 Symbol_table::resolve
<size
, big_endian
>(sym
, symdef
);
818 this->make_forwarder(pdef
->second
, sym
);
820 sym
->set_is_default();
825 // Add one symbol from OBJECT to the symbol table. NAME is symbol
826 // name and VERSION is the version; both are canonicalized. DEF is
827 // whether this is the default version. ST_SHNDX is the symbol's
828 // section index; IS_ORDINARY is whether this is a normal section
829 // rather than a special code.
831 // If IS_DEFAULT_VERSION is true, then this is the definition of a
832 // default version of a symbol. That means that any lookup of
833 // NAME/NULL and any lookup of NAME/VERSION should always return the
834 // same symbol. This is obvious for references, but in particular we
835 // want to do this for definitions: overriding NAME/NULL should also
836 // override NAME/VERSION. If we don't do that, it would be very hard
837 // to override functions in a shared library which uses versioning.
839 // We implement this by simply making both entries in the hash table
840 // point to the same Symbol structure. That is easy enough if this is
841 // the first time we see NAME/NULL or NAME/VERSION, but it is possible
842 // that we have seen both already, in which case they will both have
843 // independent entries in the symbol table. We can't simply change
844 // the symbol table entry, because we have pointers to the entries
845 // attached to the object files. So we mark the entry attached to the
846 // object file as a forwarder, and record it in the forwarders_ map.
847 // Note that entries in the hash table will never be marked as
850 // ORIG_ST_SHNDX and ST_SHNDX are almost always the same.
851 // ORIG_ST_SHNDX is the section index in the input file, or SHN_UNDEF
852 // for a special section code. ST_SHNDX may be modified if the symbol
853 // is defined in a section being discarded.
855 template<int size
, bool big_endian
>
857 Symbol_table::add_from_object(Object
* object
,
859 Stringpool::Key name_key
,
861 Stringpool::Key version_key
,
862 bool is_default_version
,
863 const elfcpp::Sym
<size
, big_endian
>& sym
,
864 unsigned int st_shndx
,
866 unsigned int orig_st_shndx
)
868 // Print a message if this symbol is being traced.
869 if (parameters
->options().is_trace_symbol(name
))
871 if (orig_st_shndx
== elfcpp::SHN_UNDEF
)
872 gold_info(_("%s: reference to %s"), object
->name().c_str(), name
);
874 gold_info(_("%s: definition of %s"), object
->name().c_str(), name
);
877 // For an undefined symbol, we may need to adjust the name using
879 if (orig_st_shndx
== elfcpp::SHN_UNDEF
880 && parameters
->options().any_wrap())
882 const char* wrap_name
= this->wrap_symbol(name
, &name_key
);
883 if (wrap_name
!= name
)
885 // If we see a reference to malloc with version GLIBC_2.0,
886 // and we turn it into a reference to __wrap_malloc, then we
887 // discard the version number. Otherwise the user would be
888 // required to specify the correct version for
896 Symbol
* const snull
= NULL
;
897 std::pair
<typename
Symbol_table_type::iterator
, bool> ins
=
898 this->table_
.insert(std::make_pair(std::make_pair(name_key
, version_key
),
901 std::pair
<typename
Symbol_table_type::iterator
, bool> insdefault
=
902 std::make_pair(this->table_
.end(), false);
903 if (is_default_version
)
905 const Stringpool::Key vnull_key
= 0;
906 insdefault
= this->table_
.insert(std::make_pair(std::make_pair(name_key
,
911 // ins.first: an iterator, which is a pointer to a pair.
912 // ins.first->first: the key (a pair of name and version).
913 // ins.first->second: the value (Symbol*).
914 // ins.second: true if new entry was inserted, false if not.
916 Sized_symbol
<size
>* ret
;
921 // We already have an entry for NAME/VERSION.
922 ret
= this->get_sized_symbol
<size
>(ins
.first
->second
);
923 gold_assert(ret
!= NULL
);
925 was_undefined
= ret
->is_undefined();
926 was_common
= ret
->is_common();
928 this->resolve(ret
, sym
, st_shndx
, is_ordinary
, orig_st_shndx
, object
,
930 if (parameters
->options().gc_sections())
931 this->gc_mark_dyn_syms(ret
);
933 if (is_default_version
)
934 this->define_default_version
<size
, big_endian
>(ret
, insdefault
.second
,
939 // This is the first time we have seen NAME/VERSION.
940 gold_assert(ins
.first
->second
== NULL
);
942 if (is_default_version
&& !insdefault
.second
)
944 // We already have an entry for NAME/NULL. If we override
945 // it, then change it to NAME/VERSION.
946 ret
= this->get_sized_symbol
<size
>(insdefault
.first
->second
);
948 was_undefined
= ret
->is_undefined();
949 was_common
= ret
->is_common();
951 this->resolve(ret
, sym
, st_shndx
, is_ordinary
, orig_st_shndx
, object
,
953 if (parameters
->options().gc_sections())
954 this->gc_mark_dyn_syms(ret
);
955 ins
.first
->second
= ret
;
959 was_undefined
= false;
962 Sized_target
<size
, big_endian
>* target
=
963 parameters
->sized_target
<size
, big_endian
>();
964 if (!target
->has_make_symbol())
965 ret
= new Sized_symbol
<size
>();
968 ret
= target
->make_symbol();
971 // This means that we don't want a symbol table
973 if (!is_default_version
)
974 this->table_
.erase(ins
.first
);
977 this->table_
.erase(insdefault
.first
);
978 // Inserting INSDEFAULT invalidated INS.
979 this->table_
.erase(std::make_pair(name_key
,
986 ret
->init_object(name
, version
, object
, sym
, st_shndx
, is_ordinary
);
988 ins
.first
->second
= ret
;
989 if (is_default_version
)
991 // This is the first time we have seen NAME/NULL. Point
992 // it at the new entry for NAME/VERSION.
993 gold_assert(insdefault
.second
);
994 insdefault
.first
->second
= ret
;
998 if (is_default_version
)
999 ret
->set_is_default();
1002 // Record every time we see a new undefined symbol, to speed up
1004 if (!was_undefined
&& ret
->is_undefined())
1006 ++this->saw_undefined_
;
1007 if (parameters
->options().has_plugins())
1008 parameters
->options().plugins()->new_undefined_symbol(ret
);
1011 // Keep track of common symbols, to speed up common symbol
1013 if (!was_common
&& ret
->is_common())
1015 if (ret
->type() == elfcpp::STT_TLS
)
1016 this->tls_commons_
.push_back(ret
);
1017 else if (!is_ordinary
1018 && st_shndx
== parameters
->target().small_common_shndx())
1019 this->small_commons_
.push_back(ret
);
1020 else if (!is_ordinary
1021 && st_shndx
== parameters
->target().large_common_shndx())
1022 this->large_commons_
.push_back(ret
);
1024 this->commons_
.push_back(ret
);
1027 // If we're not doing a relocatable link, then any symbol with
1028 // hidden or internal visibility is local.
1029 if ((ret
->visibility() == elfcpp::STV_HIDDEN
1030 || ret
->visibility() == elfcpp::STV_INTERNAL
)
1031 && (ret
->binding() == elfcpp::STB_GLOBAL
1032 || ret
->binding() == elfcpp::STB_GNU_UNIQUE
1033 || ret
->binding() == elfcpp::STB_WEAK
)
1034 && !parameters
->options().relocatable())
1035 this->force_local(ret
);
1040 // Add all the symbols in a relocatable object to the hash table.
1042 template<int size
, bool big_endian
>
1044 Symbol_table::add_from_relobj(
1045 Sized_relobj
<size
, big_endian
>* relobj
,
1046 const unsigned char* syms
,
1048 size_t symndx_offset
,
1049 const char* sym_names
,
1050 size_t sym_name_size
,
1051 typename Sized_relobj
<size
, big_endian
>::Symbols
* sympointers
,
1056 gold_assert(size
== parameters
->target().get_size());
1058 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
1060 const bool just_symbols
= relobj
->just_symbols();
1062 const unsigned char* p
= syms
;
1063 for (size_t i
= 0; i
< count
; ++i
, p
+= sym_size
)
1065 (*sympointers
)[i
] = NULL
;
1067 elfcpp::Sym
<size
, big_endian
> sym(p
);
1069 unsigned int st_name
= sym
.get_st_name();
1070 if (st_name
>= sym_name_size
)
1072 relobj
->error(_("bad global symbol name offset %u at %zu"),
1077 const char* name
= sym_names
+ st_name
;
1080 unsigned int st_shndx
= relobj
->adjust_sym_shndx(i
+ symndx_offset
,
1083 unsigned int orig_st_shndx
= st_shndx
;
1085 orig_st_shndx
= elfcpp::SHN_UNDEF
;
1087 if (st_shndx
!= elfcpp::SHN_UNDEF
)
1090 // A symbol defined in a section which we are not including must
1091 // be treated as an undefined symbol.
1092 bool is_defined_in_discarded_section
= false;
1093 if (st_shndx
!= elfcpp::SHN_UNDEF
1095 && !relobj
->is_section_included(st_shndx
)
1096 && !this->is_section_folded(relobj
, st_shndx
))
1098 st_shndx
= elfcpp::SHN_UNDEF
;
1099 is_defined_in_discarded_section
= true;
1102 // In an object file, an '@' in the name separates the symbol
1103 // name from the version name. If there are two '@' characters,
1104 // this is the default version.
1105 const char* ver
= strchr(name
, '@');
1106 Stringpool::Key ver_key
= 0;
1108 // IS_DEFAULT_VERSION: is the version default?
1109 // IS_FORCED_LOCAL: is the symbol forced local?
1110 bool is_default_version
= false;
1111 bool is_forced_local
= false;
1115 // The symbol name is of the form foo@VERSION or foo@@VERSION
1116 namelen
= ver
- name
;
1120 is_default_version
= true;
1123 ver
= this->namepool_
.add(ver
, true, &ver_key
);
1125 // We don't want to assign a version to an undefined symbol,
1126 // even if it is listed in the version script. FIXME: What
1127 // about a common symbol?
1130 namelen
= strlen(name
);
1131 if (!this->version_script_
.empty()
1132 && st_shndx
!= elfcpp::SHN_UNDEF
)
1134 // The symbol name did not have a version, but the
1135 // version script may assign a version anyway.
1136 std::string version
;
1138 if (this->version_script_
.get_symbol_version(name
, &version
,
1142 is_forced_local
= true;
1143 else if (!version
.empty())
1145 ver
= this->namepool_
.add_with_length(version
.c_str(),
1149 is_default_version
= true;
1155 elfcpp::Sym
<size
, big_endian
>* psym
= &sym
;
1156 unsigned char symbuf
[sym_size
];
1157 elfcpp::Sym
<size
, big_endian
> sym2(symbuf
);
1160 memcpy(symbuf
, p
, sym_size
);
1161 elfcpp::Sym_write
<size
, big_endian
> sw(symbuf
);
1162 if (orig_st_shndx
!= elfcpp::SHN_UNDEF
&& is_ordinary
)
1164 // Symbol values in object files are section relative.
1165 // This is normally what we want, but since here we are
1166 // converting the symbol to absolute we need to add the
1167 // section address. The section address in an object
1168 // file is normally zero, but people can use a linker
1169 // script to change it.
1170 sw
.put_st_value(sym
.get_st_value()
1171 + relobj
->section_address(orig_st_shndx
));
1173 st_shndx
= elfcpp::SHN_ABS
;
1174 is_ordinary
= false;
1178 // Fix up visibility if object has no-export set.
1179 if (relobj
->no_export()
1180 && (orig_st_shndx
!= elfcpp::SHN_UNDEF
|| !is_ordinary
))
1182 // We may have copied symbol already above.
1185 memcpy(symbuf
, p
, sym_size
);
1189 elfcpp::STV visibility
= sym2
.get_st_visibility();
1190 if (visibility
== elfcpp::STV_DEFAULT
1191 || visibility
== elfcpp::STV_PROTECTED
)
1193 elfcpp::Sym_write
<size
, big_endian
> sw(symbuf
);
1194 unsigned char nonvis
= sym2
.get_st_nonvis();
1195 sw
.put_st_other(elfcpp::STV_HIDDEN
, nonvis
);
1199 Stringpool::Key name_key
;
1200 name
= this->namepool_
.add_with_length(name
, namelen
, true,
1203 Sized_symbol
<size
>* res
;
1204 res
= this->add_from_object(relobj
, name
, name_key
, ver
, ver_key
,
1205 is_default_version
, *psym
, st_shndx
,
1206 is_ordinary
, orig_st_shndx
);
1208 // If building a shared library using garbage collection, do not
1209 // treat externally visible symbols as garbage.
1210 if (parameters
->options().gc_sections()
1211 && parameters
->options().shared())
1212 this->gc_mark_symbol_for_shlib(res
);
1214 if (is_forced_local
)
1215 this->force_local(res
);
1217 if (is_defined_in_discarded_section
)
1218 res
->set_is_defined_in_discarded_section();
1220 (*sympointers
)[i
] = res
;
1224 // Add a symbol from a plugin-claimed file.
1226 template<int size
, bool big_endian
>
1228 Symbol_table::add_from_pluginobj(
1229 Sized_pluginobj
<size
, big_endian
>* obj
,
1232 elfcpp::Sym
<size
, big_endian
>* sym
)
1234 unsigned int st_shndx
= sym
->get_st_shndx();
1235 bool is_ordinary
= st_shndx
< elfcpp::SHN_LORESERVE
;
1237 Stringpool::Key ver_key
= 0;
1238 bool is_default_version
= false;
1239 bool is_forced_local
= false;
1243 ver
= this->namepool_
.add(ver
, true, &ver_key
);
1245 // We don't want to assign a version to an undefined symbol,
1246 // even if it is listed in the version script. FIXME: What
1247 // about a common symbol?
1250 if (!this->version_script_
.empty()
1251 && st_shndx
!= elfcpp::SHN_UNDEF
)
1253 // The symbol name did not have a version, but the
1254 // version script may assign a version anyway.
1255 std::string version
;
1257 if (this->version_script_
.get_symbol_version(name
, &version
,
1261 is_forced_local
= true;
1262 else if (!version
.empty())
1264 ver
= this->namepool_
.add_with_length(version
.c_str(),
1268 is_default_version
= true;
1274 Stringpool::Key name_key
;
1275 name
= this->namepool_
.add(name
, true, &name_key
);
1277 Sized_symbol
<size
>* res
;
1278 res
= this->add_from_object(obj
, name
, name_key
, ver
, ver_key
,
1279 is_default_version
, *sym
, st_shndx
,
1280 is_ordinary
, st_shndx
);
1282 if (is_forced_local
)
1283 this->force_local(res
);
1288 // Add all the symbols in a dynamic object to the hash table.
1290 template<int size
, bool big_endian
>
1292 Symbol_table::add_from_dynobj(
1293 Sized_dynobj
<size
, big_endian
>* dynobj
,
1294 const unsigned char* syms
,
1296 const char* sym_names
,
1297 size_t sym_name_size
,
1298 const unsigned char* versym
,
1300 const std::vector
<const char*>* version_map
,
1301 typename Sized_relobj
<size
, big_endian
>::Symbols
* sympointers
,
1306 gold_assert(size
== parameters
->target().get_size());
1308 if (dynobj
->just_symbols())
1310 gold_error(_("--just-symbols does not make sense with a shared object"));
1314 if (versym
!= NULL
&& versym_size
/ 2 < count
)
1316 dynobj
->error(_("too few symbol versions"));
1320 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
1322 // We keep a list of all STT_OBJECT symbols, so that we can resolve
1323 // weak aliases. This is necessary because if the dynamic object
1324 // provides the same variable under two names, one of which is a
1325 // weak definition, and the regular object refers to the weak
1326 // definition, we have to put both the weak definition and the
1327 // strong definition into the dynamic symbol table. Given a weak
1328 // definition, the only way that we can find the corresponding
1329 // strong definition, if any, is to search the symbol table.
1330 std::vector
<Sized_symbol
<size
>*> object_symbols
;
1332 const unsigned char* p
= syms
;
1333 const unsigned char* vs
= versym
;
1334 for (size_t i
= 0; i
< count
; ++i
, p
+= sym_size
, vs
+= 2)
1336 elfcpp::Sym
<size
, big_endian
> sym(p
);
1338 if (sympointers
!= NULL
)
1339 (*sympointers
)[i
] = NULL
;
1341 // Ignore symbols with local binding or that have
1342 // internal or hidden visibility.
1343 if (sym
.get_st_bind() == elfcpp::STB_LOCAL
1344 || sym
.get_st_visibility() == elfcpp::STV_INTERNAL
1345 || sym
.get_st_visibility() == elfcpp::STV_HIDDEN
)
1348 // A protected symbol in a shared library must be treated as a
1349 // normal symbol when viewed from outside the shared library.
1350 // Implement this by overriding the visibility here.
1351 elfcpp::Sym
<size
, big_endian
>* psym
= &sym
;
1352 unsigned char symbuf
[sym_size
];
1353 elfcpp::Sym
<size
, big_endian
> sym2(symbuf
);
1354 if (sym
.get_st_visibility() == elfcpp::STV_PROTECTED
)
1356 memcpy(symbuf
, p
, sym_size
);
1357 elfcpp::Sym_write
<size
, big_endian
> sw(symbuf
);
1358 sw
.put_st_other(elfcpp::STV_DEFAULT
, sym
.get_st_nonvis());
1362 unsigned int st_name
= psym
->get_st_name();
1363 if (st_name
>= sym_name_size
)
1365 dynobj
->error(_("bad symbol name offset %u at %zu"),
1370 const char* name
= sym_names
+ st_name
;
1373 unsigned int st_shndx
= dynobj
->adjust_sym_shndx(i
, psym
->get_st_shndx(),
1376 if (st_shndx
!= elfcpp::SHN_UNDEF
)
1379 Sized_symbol
<size
>* res
;
1383 Stringpool::Key name_key
;
1384 name
= this->namepool_
.add(name
, true, &name_key
);
1385 res
= this->add_from_object(dynobj
, name
, name_key
, NULL
, 0,
1386 false, *psym
, st_shndx
, is_ordinary
,
1391 // Read the version information.
1393 unsigned int v
= elfcpp::Swap
<16, big_endian
>::readval(vs
);
1395 bool hidden
= (v
& elfcpp::VERSYM_HIDDEN
) != 0;
1396 v
&= elfcpp::VERSYM_VERSION
;
1398 // The Sun documentation says that V can be VER_NDX_LOCAL,
1399 // or VER_NDX_GLOBAL, or a version index. The meaning of
1400 // VER_NDX_LOCAL is defined as "Symbol has local scope."
1401 // The old GNU linker will happily generate VER_NDX_LOCAL
1402 // for an undefined symbol. I don't know what the Sun
1403 // linker will generate.
1405 if (v
== static_cast<unsigned int>(elfcpp::VER_NDX_LOCAL
)
1406 && st_shndx
!= elfcpp::SHN_UNDEF
)
1408 // This symbol should not be visible outside the object.
1412 // At this point we are definitely going to add this symbol.
1413 Stringpool::Key name_key
;
1414 name
= this->namepool_
.add(name
, true, &name_key
);
1416 if (v
== static_cast<unsigned int>(elfcpp::VER_NDX_LOCAL
)
1417 || v
== static_cast<unsigned int>(elfcpp::VER_NDX_GLOBAL
))
1419 // This symbol does not have a version.
1420 res
= this->add_from_object(dynobj
, name
, name_key
, NULL
, 0,
1421 false, *psym
, st_shndx
, is_ordinary
,
1426 if (v
>= version_map
->size())
1428 dynobj
->error(_("versym for symbol %zu out of range: %u"),
1433 const char* version
= (*version_map
)[v
];
1434 if (version
== NULL
)
1436 dynobj
->error(_("versym for symbol %zu has no name: %u"),
1441 Stringpool::Key version_key
;
1442 version
= this->namepool_
.add(version
, true, &version_key
);
1444 // If this is an absolute symbol, and the version name
1445 // and symbol name are the same, then this is the
1446 // version definition symbol. These symbols exist to
1447 // support using -u to pull in particular versions. We
1448 // do not want to record a version for them.
1449 if (st_shndx
== elfcpp::SHN_ABS
1451 && name_key
== version_key
)
1452 res
= this->add_from_object(dynobj
, name
, name_key
, NULL
, 0,
1453 false, *psym
, st_shndx
, is_ordinary
,
1457 const bool is_default_version
=
1458 !hidden
&& st_shndx
!= elfcpp::SHN_UNDEF
;
1459 res
= this->add_from_object(dynobj
, name
, name_key
, version
,
1460 version_key
, is_default_version
,
1462 is_ordinary
, st_shndx
);
1467 // Note that it is possible that RES was overridden by an
1468 // earlier object, in which case it can't be aliased here.
1469 if (st_shndx
!= elfcpp::SHN_UNDEF
1471 && psym
->get_st_type() == elfcpp::STT_OBJECT
1472 && res
->source() == Symbol::FROM_OBJECT
1473 && res
->object() == dynobj
)
1474 object_symbols
.push_back(res
);
1476 if (sympointers
!= NULL
)
1477 (*sympointers
)[i
] = res
;
1480 this->record_weak_aliases(&object_symbols
);
1483 // This is used to sort weak aliases. We sort them first by section
1484 // index, then by offset, then by weak ahead of strong.
1487 class Weak_alias_sorter
1490 bool operator()(const Sized_symbol
<size
>*, const Sized_symbol
<size
>*) const;
1495 Weak_alias_sorter
<size
>::operator()(const Sized_symbol
<size
>* s1
,
1496 const Sized_symbol
<size
>* s2
) const
1499 unsigned int s1_shndx
= s1
->shndx(&is_ordinary
);
1500 gold_assert(is_ordinary
);
1501 unsigned int s2_shndx
= s2
->shndx(&is_ordinary
);
1502 gold_assert(is_ordinary
);
1503 if (s1_shndx
!= s2_shndx
)
1504 return s1_shndx
< s2_shndx
;
1506 if (s1
->value() != s2
->value())
1507 return s1
->value() < s2
->value();
1508 if (s1
->binding() != s2
->binding())
1510 if (s1
->binding() == elfcpp::STB_WEAK
)
1512 if (s2
->binding() == elfcpp::STB_WEAK
)
1515 return std::string(s1
->name()) < std::string(s2
->name());
1518 // SYMBOLS is a list of object symbols from a dynamic object. Look
1519 // for any weak aliases, and record them so that if we add the weak
1520 // alias to the dynamic symbol table, we also add the corresponding
1525 Symbol_table::record_weak_aliases(std::vector
<Sized_symbol
<size
>*>* symbols
)
1527 // Sort the vector by section index, then by offset, then by weak
1529 std::sort(symbols
->begin(), symbols
->end(), Weak_alias_sorter
<size
>());
1531 // Walk through the vector. For each weak definition, record
1533 for (typename
std::vector
<Sized_symbol
<size
>*>::const_iterator p
=
1535 p
!= symbols
->end();
1538 if ((*p
)->binding() != elfcpp::STB_WEAK
)
1541 // Build a circular list of weak aliases. Each symbol points to
1542 // the next one in the circular list.
1544 Sized_symbol
<size
>* from_sym
= *p
;
1545 typename
std::vector
<Sized_symbol
<size
>*>::const_iterator q
;
1546 for (q
= p
+ 1; q
!= symbols
->end(); ++q
)
1549 if ((*q
)->shndx(&dummy
) != from_sym
->shndx(&dummy
)
1550 || (*q
)->value() != from_sym
->value())
1553 this->weak_aliases_
[from_sym
] = *q
;
1554 from_sym
->set_has_alias();
1560 this->weak_aliases_
[from_sym
] = *p
;
1561 from_sym
->set_has_alias();
1568 // Create and return a specially defined symbol. If ONLY_IF_REF is
1569 // true, then only create the symbol if there is a reference to it.
1570 // If this does not return NULL, it sets *POLDSYM to the existing
1571 // symbol if there is one. This sets *RESOLVE_OLDSYM if we should
1572 // resolve the newly created symbol to the old one. This
1573 // canonicalizes *PNAME and *PVERSION.
1575 template<int size
, bool big_endian
>
1577 Symbol_table::define_special_symbol(const char** pname
, const char** pversion
,
1579 Sized_symbol
<size
>** poldsym
,
1580 bool* resolve_oldsym
)
1582 *resolve_oldsym
= false;
1584 // If the caller didn't give us a version, see if we get one from
1585 // the version script.
1587 bool is_default_version
= false;
1588 if (*pversion
== NULL
)
1591 if (this->version_script_
.get_symbol_version(*pname
, &v
, &is_global
))
1593 if (is_global
&& !v
.empty())
1595 *pversion
= v
.c_str();
1596 // If we get the version from a version script, then we
1597 // are also the default version.
1598 is_default_version
= true;
1604 Sized_symbol
<size
>* sym
;
1606 bool add_to_table
= false;
1607 typename
Symbol_table_type::iterator add_loc
= this->table_
.end();
1608 bool add_def_to_table
= false;
1609 typename
Symbol_table_type::iterator add_def_loc
= this->table_
.end();
1613 oldsym
= this->lookup(*pname
, *pversion
);
1614 if (oldsym
== NULL
&& is_default_version
)
1615 oldsym
= this->lookup(*pname
, NULL
);
1616 if (oldsym
== NULL
|| !oldsym
->is_undefined())
1619 *pname
= oldsym
->name();
1620 if (!is_default_version
)
1621 *pversion
= oldsym
->version();
1625 // Canonicalize NAME and VERSION.
1626 Stringpool::Key name_key
;
1627 *pname
= this->namepool_
.add(*pname
, true, &name_key
);
1629 Stringpool::Key version_key
= 0;
1630 if (*pversion
!= NULL
)
1631 *pversion
= this->namepool_
.add(*pversion
, true, &version_key
);
1633 Symbol
* const snull
= NULL
;
1634 std::pair
<typename
Symbol_table_type::iterator
, bool> ins
=
1635 this->table_
.insert(std::make_pair(std::make_pair(name_key
,
1639 std::pair
<typename
Symbol_table_type::iterator
, bool> insdefault
=
1640 std::make_pair(this->table_
.end(), false);
1641 if (is_default_version
)
1643 const Stringpool::Key vnull
= 0;
1645 this->table_
.insert(std::make_pair(std::make_pair(name_key
,
1652 // We already have a symbol table entry for NAME/VERSION.
1653 oldsym
= ins
.first
->second
;
1654 gold_assert(oldsym
!= NULL
);
1656 if (is_default_version
)
1658 Sized_symbol
<size
>* soldsym
=
1659 this->get_sized_symbol
<size
>(oldsym
);
1660 this->define_default_version
<size
, big_endian
>(soldsym
,
1667 // We haven't seen this symbol before.
1668 gold_assert(ins
.first
->second
== NULL
);
1670 add_to_table
= true;
1671 add_loc
= ins
.first
;
1673 if (is_default_version
&& !insdefault
.second
)
1675 // We are adding NAME/VERSION, and it is the default
1676 // version. We already have an entry for NAME/NULL.
1677 oldsym
= insdefault
.first
->second
;
1678 *resolve_oldsym
= true;
1684 if (is_default_version
)
1686 add_def_to_table
= true;
1687 add_def_loc
= insdefault
.first
;
1693 const Target
& target
= parameters
->target();
1694 if (!target
.has_make_symbol())
1695 sym
= new Sized_symbol
<size
>();
1698 Sized_target
<size
, big_endian
>* sized_target
=
1699 parameters
->sized_target
<size
, big_endian
>();
1700 sym
= sized_target
->make_symbol();
1706 add_loc
->second
= sym
;
1708 gold_assert(oldsym
!= NULL
);
1710 if (add_def_to_table
)
1711 add_def_loc
->second
= sym
;
1713 *poldsym
= this->get_sized_symbol
<size
>(oldsym
);
1718 // Define a symbol based on an Output_data.
1721 Symbol_table::define_in_output_data(const char* name
,
1722 const char* version
,
1728 elfcpp::STB binding
,
1729 elfcpp::STV visibility
,
1730 unsigned char nonvis
,
1731 bool offset_is_from_end
,
1734 if (parameters
->target().get_size() == 32)
1736 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
1737 return this->do_define_in_output_data
<32>(name
, version
, defined
, od
,
1738 value
, symsize
, type
, binding
,
1746 else if (parameters
->target().get_size() == 64)
1748 #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
1749 return this->do_define_in_output_data
<64>(name
, version
, defined
, od
,
1750 value
, symsize
, type
, binding
,
1762 // Define a symbol in an Output_data, sized version.
1766 Symbol_table::do_define_in_output_data(
1768 const char* version
,
1771 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
,
1772 typename
elfcpp::Elf_types
<size
>::Elf_WXword symsize
,
1774 elfcpp::STB binding
,
1775 elfcpp::STV visibility
,
1776 unsigned char nonvis
,
1777 bool offset_is_from_end
,
1780 Sized_symbol
<size
>* sym
;
1781 Sized_symbol
<size
>* oldsym
;
1782 bool resolve_oldsym
;
1784 if (parameters
->target().is_big_endian())
1786 #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG)
1787 sym
= this->define_special_symbol
<size
, true>(&name
, &version
,
1788 only_if_ref
, &oldsym
,
1796 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE)
1797 sym
= this->define_special_symbol
<size
, false>(&name
, &version
,
1798 only_if_ref
, &oldsym
,
1808 sym
->init_output_data(name
, version
, od
, value
, symsize
, type
, binding
,
1809 visibility
, nonvis
, offset_is_from_end
);
1813 if (binding
== elfcpp::STB_LOCAL
1814 || this->version_script_
.symbol_is_local(name
))
1815 this->force_local(sym
);
1816 else if (version
!= NULL
)
1817 sym
->set_is_default();
1821 if (Symbol_table::should_override_with_special(oldsym
, defined
))
1822 this->override_with_special(oldsym
, sym
);
1833 // Define a symbol based on an Output_segment.
1836 Symbol_table::define_in_output_segment(const char* name
,
1837 const char* version
,
1843 elfcpp::STB binding
,
1844 elfcpp::STV visibility
,
1845 unsigned char nonvis
,
1846 Symbol::Segment_offset_base offset_base
,
1849 if (parameters
->target().get_size() == 32)
1851 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
1852 return this->do_define_in_output_segment
<32>(name
, version
, defined
, os
,
1853 value
, symsize
, type
,
1854 binding
, visibility
, nonvis
,
1855 offset_base
, only_if_ref
);
1860 else if (parameters
->target().get_size() == 64)
1862 #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
1863 return this->do_define_in_output_segment
<64>(name
, version
, defined
, os
,
1864 value
, symsize
, type
,
1865 binding
, visibility
, nonvis
,
1866 offset_base
, only_if_ref
);
1875 // Define a symbol in an Output_segment, sized version.
1879 Symbol_table::do_define_in_output_segment(
1881 const char* version
,
1884 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
,
1885 typename
elfcpp::Elf_types
<size
>::Elf_WXword symsize
,
1887 elfcpp::STB binding
,
1888 elfcpp::STV visibility
,
1889 unsigned char nonvis
,
1890 Symbol::Segment_offset_base offset_base
,
1893 Sized_symbol
<size
>* sym
;
1894 Sized_symbol
<size
>* oldsym
;
1895 bool resolve_oldsym
;
1897 if (parameters
->target().is_big_endian())
1899 #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG)
1900 sym
= this->define_special_symbol
<size
, true>(&name
, &version
,
1901 only_if_ref
, &oldsym
,
1909 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE)
1910 sym
= this->define_special_symbol
<size
, false>(&name
, &version
,
1911 only_if_ref
, &oldsym
,
1921 sym
->init_output_segment(name
, version
, os
, value
, symsize
, type
, binding
,
1922 visibility
, nonvis
, offset_base
);
1926 if (binding
== elfcpp::STB_LOCAL
1927 || this->version_script_
.symbol_is_local(name
))
1928 this->force_local(sym
);
1929 else if (version
!= NULL
)
1930 sym
->set_is_default();
1934 if (Symbol_table::should_override_with_special(oldsym
, defined
))
1935 this->override_with_special(oldsym
, sym
);
1946 // Define a special symbol with a constant value. It is a multiple
1947 // definition error if this symbol is already defined.
1950 Symbol_table::define_as_constant(const char* name
,
1951 const char* version
,
1956 elfcpp::STB binding
,
1957 elfcpp::STV visibility
,
1958 unsigned char nonvis
,
1960 bool force_override
)
1962 if (parameters
->target().get_size() == 32)
1964 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
1965 return this->do_define_as_constant
<32>(name
, version
, defined
, value
,
1966 symsize
, type
, binding
,
1967 visibility
, nonvis
, only_if_ref
,
1973 else if (parameters
->target().get_size() == 64)
1975 #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
1976 return this->do_define_as_constant
<64>(name
, version
, defined
, value
,
1977 symsize
, type
, binding
,
1978 visibility
, nonvis
, only_if_ref
,
1988 // Define a symbol as a constant, sized version.
1992 Symbol_table::do_define_as_constant(
1994 const char* version
,
1996 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
,
1997 typename
elfcpp::Elf_types
<size
>::Elf_WXword symsize
,
1999 elfcpp::STB binding
,
2000 elfcpp::STV visibility
,
2001 unsigned char nonvis
,
2003 bool force_override
)
2005 Sized_symbol
<size
>* sym
;
2006 Sized_symbol
<size
>* oldsym
;
2007 bool resolve_oldsym
;
2009 if (parameters
->target().is_big_endian())
2011 #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG)
2012 sym
= this->define_special_symbol
<size
, true>(&name
, &version
,
2013 only_if_ref
, &oldsym
,
2021 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE)
2022 sym
= this->define_special_symbol
<size
, false>(&name
, &version
,
2023 only_if_ref
, &oldsym
,
2033 sym
->init_constant(name
, version
, value
, symsize
, type
, binding
, visibility
,
2038 // Version symbols are absolute symbols with name == version.
2039 // We don't want to force them to be local.
2040 if ((version
== NULL
2043 && (binding
== elfcpp::STB_LOCAL
2044 || this->version_script_
.symbol_is_local(name
)))
2045 this->force_local(sym
);
2046 else if (version
!= NULL
2047 && (name
!= version
|| value
!= 0))
2048 sym
->set_is_default();
2053 || Symbol_table::should_override_with_special(oldsym
, defined
))
2054 this->override_with_special(oldsym
, sym
);
2065 // Define a set of symbols in output sections.
2068 Symbol_table::define_symbols(const Layout
* layout
, int count
,
2069 const Define_symbol_in_section
* p
,
2072 for (int i
= 0; i
< count
; ++i
, ++p
)
2074 Output_section
* os
= layout
->find_output_section(p
->output_section
);
2076 this->define_in_output_data(p
->name
, NULL
, PREDEFINED
, os
, p
->value
,
2077 p
->size
, p
->type
, p
->binding
,
2078 p
->visibility
, p
->nonvis
,
2079 p
->offset_is_from_end
,
2080 only_if_ref
|| p
->only_if_ref
);
2082 this->define_as_constant(p
->name
, NULL
, PREDEFINED
, 0, p
->size
,
2083 p
->type
, p
->binding
, p
->visibility
, p
->nonvis
,
2084 only_if_ref
|| p
->only_if_ref
,
2089 // Define a set of symbols in output segments.
2092 Symbol_table::define_symbols(const Layout
* layout
, int count
,
2093 const Define_symbol_in_segment
* p
,
2096 for (int i
= 0; i
< count
; ++i
, ++p
)
2098 Output_segment
* os
= layout
->find_output_segment(p
->segment_type
,
2099 p
->segment_flags_set
,
2100 p
->segment_flags_clear
);
2102 this->define_in_output_segment(p
->name
, NULL
, PREDEFINED
, os
, p
->value
,
2103 p
->size
, p
->type
, p
->binding
,
2104 p
->visibility
, p
->nonvis
,
2106 only_if_ref
|| p
->only_if_ref
);
2108 this->define_as_constant(p
->name
, NULL
, PREDEFINED
, 0, p
->size
,
2109 p
->type
, p
->binding
, p
->visibility
, p
->nonvis
,
2110 only_if_ref
|| p
->only_if_ref
,
2115 // Define CSYM using a COPY reloc. POSD is the Output_data where the
2116 // symbol should be defined--typically a .dyn.bss section. VALUE is
2117 // the offset within POSD.
2121 Symbol_table::define_with_copy_reloc(
2122 Sized_symbol
<size
>* csym
,
2124 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
)
2126 gold_assert(csym
->is_from_dynobj());
2127 gold_assert(!csym
->is_copied_from_dynobj());
2128 Object
* object
= csym
->object();
2129 gold_assert(object
->is_dynamic());
2130 Dynobj
* dynobj
= static_cast<Dynobj
*>(object
);
2132 // Our copied variable has to override any variable in a shared
2134 elfcpp::STB binding
= csym
->binding();
2135 if (binding
== elfcpp::STB_WEAK
)
2136 binding
= elfcpp::STB_GLOBAL
;
2138 this->define_in_output_data(csym
->name(), csym
->version(), COPY
,
2139 posd
, value
, csym
->symsize(),
2140 csym
->type(), binding
,
2141 csym
->visibility(), csym
->nonvis(),
2144 csym
->set_is_copied_from_dynobj();
2145 csym
->set_needs_dynsym_entry();
2147 this->copied_symbol_dynobjs_
[csym
] = dynobj
;
2149 // We have now defined all aliases, but we have not entered them all
2150 // in the copied_symbol_dynobjs_ map.
2151 if (csym
->has_alias())
2156 sym
= this->weak_aliases_
[sym
];
2159 gold_assert(sym
->output_data() == posd
);
2161 sym
->set_is_copied_from_dynobj();
2162 this->copied_symbol_dynobjs_
[sym
] = dynobj
;
2167 // SYM is defined using a COPY reloc. Return the dynamic object where
2168 // the original definition was found.
2171 Symbol_table::get_copy_source(const Symbol
* sym
) const
2173 gold_assert(sym
->is_copied_from_dynobj());
2174 Copied_symbol_dynobjs::const_iterator p
=
2175 this->copied_symbol_dynobjs_
.find(sym
);
2176 gold_assert(p
!= this->copied_symbol_dynobjs_
.end());
2180 // Add any undefined symbols named on the command line.
2183 Symbol_table::add_undefined_symbols_from_command_line(Layout
* layout
)
2185 if (parameters
->options().any_undefined()
2186 || layout
->script_options()->any_unreferenced())
2188 if (parameters
->target().get_size() == 32)
2190 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
2191 this->do_add_undefined_symbols_from_command_line
<32>(layout
);
2196 else if (parameters
->target().get_size() == 64)
2198 #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
2199 this->do_add_undefined_symbols_from_command_line
<64>(layout
);
2211 Symbol_table::do_add_undefined_symbols_from_command_line(Layout
* layout
)
2213 for (options::String_set::const_iterator p
=
2214 parameters
->options().undefined_begin();
2215 p
!= parameters
->options().undefined_end();
2217 this->add_undefined_symbol_from_command_line
<size
>(p
->c_str());
2219 for (Script_options::referenced_const_iterator p
=
2220 layout
->script_options()->referenced_begin();
2221 p
!= layout
->script_options()->referenced_end();
2223 this->add_undefined_symbol_from_command_line
<size
>(p
->c_str());
2228 Symbol_table::add_undefined_symbol_from_command_line(const char* name
)
2230 if (this->lookup(name
) != NULL
)
2233 const char* version
= NULL
;
2235 Sized_symbol
<size
>* sym
;
2236 Sized_symbol
<size
>* oldsym
;
2237 bool resolve_oldsym
;
2238 if (parameters
->target().is_big_endian())
2240 #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG)
2241 sym
= this->define_special_symbol
<size
, true>(&name
, &version
,
2250 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE)
2251 sym
= this->define_special_symbol
<size
, false>(&name
, &version
,
2259 gold_assert(oldsym
== NULL
);
2261 sym
->init_undefined(name
, version
, elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
2262 elfcpp::STV_DEFAULT
, 0);
2263 ++this->saw_undefined_
;
2266 // Set the dynamic symbol indexes. INDEX is the index of the first
2267 // global dynamic symbol. Pointers to the symbols are stored into the
2268 // vector SYMS. The names are added to DYNPOOL. This returns an
2269 // updated dynamic symbol index.
2272 Symbol_table::set_dynsym_indexes(unsigned int index
,
2273 std::vector
<Symbol
*>* syms
,
2274 Stringpool
* dynpool
,
2277 for (Symbol_table_type::iterator p
= this->table_
.begin();
2278 p
!= this->table_
.end();
2281 Symbol
* sym
= p
->second
;
2283 // Note that SYM may already have a dynamic symbol index, since
2284 // some symbols appear more than once in the symbol table, with
2285 // and without a version.
2287 if (!sym
->should_add_dynsym_entry(this))
2288 sym
->set_dynsym_index(-1U);
2289 else if (!sym
->has_dynsym_index())
2291 sym
->set_dynsym_index(index
);
2293 syms
->push_back(sym
);
2294 dynpool
->add(sym
->name(), false, NULL
);
2296 // Record any version information.
2297 if (sym
->version() != NULL
)
2298 versions
->record_version(this, dynpool
, sym
);
2300 // If the symbol is defined in a dynamic object and is
2301 // referenced in a regular object, then mark the dynamic
2302 // object as needed. This is used to implement --as-needed.
2303 if (sym
->is_from_dynobj() && sym
->in_reg())
2304 sym
->object()->set_is_needed();
2308 // Finish up the versions. In some cases this may add new dynamic
2310 index
= versions
->finalize(this, index
, syms
);
2315 // Set the final values for all the symbols. The index of the first
2316 // global symbol in the output file is *PLOCAL_SYMCOUNT. Record the
2317 // file offset OFF. Add their names to POOL. Return the new file
2318 // offset. Update *PLOCAL_SYMCOUNT if necessary.
2321 Symbol_table::finalize(off_t off
, off_t dynoff
, size_t dyn_global_index
,
2322 size_t dyncount
, Stringpool
* pool
,
2323 unsigned int* plocal_symcount
)
2327 gold_assert(*plocal_symcount
!= 0);
2328 this->first_global_index_
= *plocal_symcount
;
2330 this->dynamic_offset_
= dynoff
;
2331 this->first_dynamic_global_index_
= dyn_global_index
;
2332 this->dynamic_count_
= dyncount
;
2334 if (parameters
->target().get_size() == 32)
2336 #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_32_LITTLE)
2337 ret
= this->sized_finalize
<32>(off
, pool
, plocal_symcount
);
2342 else if (parameters
->target().get_size() == 64)
2344 #if defined(HAVE_TARGET_64_BIG) || defined(HAVE_TARGET_64_LITTLE)
2345 ret
= this->sized_finalize
<64>(off
, pool
, plocal_symcount
);
2353 // Now that we have the final symbol table, we can reliably note
2354 // which symbols should get warnings.
2355 this->warnings_
.note_warnings(this);
2360 // SYM is going into the symbol table at *PINDEX. Add the name to
2361 // POOL, update *PINDEX and *POFF.
2365 Symbol_table::add_to_final_symtab(Symbol
* sym
, Stringpool
* pool
,
2366 unsigned int* pindex
, off_t
* poff
)
2368 sym
->set_symtab_index(*pindex
);
2369 pool
->add(sym
->name(), false, NULL
);
2371 *poff
+= elfcpp::Elf_sizes
<size
>::sym_size
;
2374 // Set the final value for all the symbols. This is called after
2375 // Layout::finalize, so all the output sections have their final
2380 Symbol_table::sized_finalize(off_t off
, Stringpool
* pool
,
2381 unsigned int* plocal_symcount
)
2383 off
= align_address(off
, size
>> 3);
2384 this->offset_
= off
;
2386 unsigned int index
= *plocal_symcount
;
2387 const unsigned int orig_index
= index
;
2389 // First do all the symbols which have been forced to be local, as
2390 // they must appear before all global symbols.
2391 for (Forced_locals::iterator p
= this->forced_locals_
.begin();
2392 p
!= this->forced_locals_
.end();
2396 gold_assert(sym
->is_forced_local());
2397 if (this->sized_finalize_symbol
<size
>(sym
))
2399 this->add_to_final_symtab
<size
>(sym
, pool
, &index
, &off
);
2404 // Now do all the remaining symbols.
2405 for (Symbol_table_type::iterator p
= this->table_
.begin();
2406 p
!= this->table_
.end();
2409 Symbol
* sym
= p
->second
;
2410 if (this->sized_finalize_symbol
<size
>(sym
))
2411 this->add_to_final_symtab
<size
>(sym
, pool
, &index
, &off
);
2414 this->output_count_
= index
- orig_index
;
2419 // Compute the final value of SYM and store status in location PSTATUS.
2420 // During relaxation, this may be called multiple times for a symbol to
2421 // compute its would-be final value in each relaxation pass.
2424 typename Sized_symbol
<size
>::Value_type
2425 Symbol_table::compute_final_value(
2426 const Sized_symbol
<size
>* sym
,
2427 Compute_final_value_status
* pstatus
) const
2429 typedef typename Sized_symbol
<size
>::Value_type Value_type
;
2432 switch (sym
->source())
2434 case Symbol::FROM_OBJECT
:
2437 unsigned int shndx
= sym
->shndx(&is_ordinary
);
2440 && shndx
!= elfcpp::SHN_ABS
2441 && !Symbol::is_common_shndx(shndx
))
2443 *pstatus
= CFVS_UNSUPPORTED_SYMBOL_SECTION
;
2447 Object
* symobj
= sym
->object();
2448 if (symobj
->is_dynamic())
2451 shndx
= elfcpp::SHN_UNDEF
;
2453 else if (symobj
->pluginobj() != NULL
)
2456 shndx
= elfcpp::SHN_UNDEF
;
2458 else if (shndx
== elfcpp::SHN_UNDEF
)
2460 else if (!is_ordinary
2461 && (shndx
== elfcpp::SHN_ABS
2462 || Symbol::is_common_shndx(shndx
)))
2463 value
= sym
->value();
2466 Relobj
* relobj
= static_cast<Relobj
*>(symobj
);
2467 Output_section
* os
= relobj
->output_section(shndx
);
2469 if (this->is_section_folded(relobj
, shndx
))
2471 gold_assert(os
== NULL
);
2472 // Get the os of the section it is folded onto.
2473 Section_id folded
= this->icf_
->get_folded_section(relobj
,
2475 gold_assert(folded
.first
!= NULL
);
2476 Relobj
* folded_obj
= reinterpret_cast<Relobj
*>(folded
.first
);
2477 unsigned folded_shndx
= folded
.second
;
2479 os
= folded_obj
->output_section(folded_shndx
);
2480 gold_assert(os
!= NULL
);
2482 // Replace (relobj, shndx) with canonical ICF input section.
2483 shndx
= folded_shndx
;
2484 relobj
= folded_obj
;
2487 uint64_t secoff64
= relobj
->output_section_offset(shndx
);
2490 bool static_or_reloc
= (parameters
->doing_static_link() ||
2491 parameters
->options().relocatable());
2492 gold_assert(static_or_reloc
|| sym
->dynsym_index() == -1U);
2494 *pstatus
= CFVS_NO_OUTPUT_SECTION
;
2498 if (secoff64
== -1ULL)
2500 // The section needs special handling (e.g., a merge section).
2502 value
= os
->output_address(relobj
, shndx
, sym
->value());
2507 convert_types
<Value_type
, uint64_t>(secoff64
);
2508 if (sym
->type() == elfcpp::STT_TLS
)
2509 value
= sym
->value() + os
->tls_offset() + secoff
;
2511 value
= sym
->value() + os
->address() + secoff
;
2517 case Symbol::IN_OUTPUT_DATA
:
2519 Output_data
* od
= sym
->output_data();
2520 value
= sym
->value();
2521 if (sym
->type() != elfcpp::STT_TLS
)
2522 value
+= od
->address();
2525 Output_section
* os
= od
->output_section();
2526 gold_assert(os
!= NULL
);
2527 value
+= os
->tls_offset() + (od
->address() - os
->address());
2529 if (sym
->offset_is_from_end())
2530 value
+= od
->data_size();
2534 case Symbol::IN_OUTPUT_SEGMENT
:
2536 Output_segment
* os
= sym
->output_segment();
2537 value
= sym
->value();
2538 if (sym
->type() != elfcpp::STT_TLS
)
2539 value
+= os
->vaddr();
2540 switch (sym
->offset_base())
2542 case Symbol::SEGMENT_START
:
2544 case Symbol::SEGMENT_END
:
2545 value
+= os
->memsz();
2547 case Symbol::SEGMENT_BSS
:
2548 value
+= os
->filesz();
2556 case Symbol::IS_CONSTANT
:
2557 value
= sym
->value();
2560 case Symbol::IS_UNDEFINED
:
2572 // Finalize the symbol SYM. This returns true if the symbol should be
2573 // added to the symbol table, false otherwise.
2577 Symbol_table::sized_finalize_symbol(Symbol
* unsized_sym
)
2579 typedef typename Sized_symbol
<size
>::Value_type Value_type
;
2581 Sized_symbol
<size
>* sym
= static_cast<Sized_symbol
<size
>*>(unsized_sym
);
2583 // The default version of a symbol may appear twice in the symbol
2584 // table. We only need to finalize it once.
2585 if (sym
->has_symtab_index())
2590 gold_assert(!sym
->has_symtab_index());
2591 sym
->set_symtab_index(-1U);
2592 gold_assert(sym
->dynsym_index() == -1U);
2596 // Compute final symbol value.
2597 Compute_final_value_status status
;
2598 Value_type value
= this->compute_final_value(sym
, &status
);
2604 case CFVS_UNSUPPORTED_SYMBOL_SECTION
:
2607 unsigned int shndx
= sym
->shndx(&is_ordinary
);
2608 gold_error(_("%s: unsupported symbol section 0x%x"),
2609 sym
->demangled_name().c_str(), shndx
);
2612 case CFVS_NO_OUTPUT_SECTION
:
2613 sym
->set_symtab_index(-1U);
2619 sym
->set_value(value
);
2621 if (parameters
->options().strip_all()
2622 || !parameters
->options().should_retain_symbol(sym
->name()))
2624 sym
->set_symtab_index(-1U);
2631 // Write out the global symbols.
2634 Symbol_table::write_globals(const Stringpool
* sympool
,
2635 const Stringpool
* dynpool
,
2636 Output_symtab_xindex
* symtab_xindex
,
2637 Output_symtab_xindex
* dynsym_xindex
,
2638 Output_file
* of
) const
2640 switch (parameters
->size_and_endianness())
2642 #ifdef HAVE_TARGET_32_LITTLE
2643 case Parameters::TARGET_32_LITTLE
:
2644 this->sized_write_globals
<32, false>(sympool
, dynpool
, symtab_xindex
,
2648 #ifdef HAVE_TARGET_32_BIG
2649 case Parameters::TARGET_32_BIG
:
2650 this->sized_write_globals
<32, true>(sympool
, dynpool
, symtab_xindex
,
2654 #ifdef HAVE_TARGET_64_LITTLE
2655 case Parameters::TARGET_64_LITTLE
:
2656 this->sized_write_globals
<64, false>(sympool
, dynpool
, symtab_xindex
,
2660 #ifdef HAVE_TARGET_64_BIG
2661 case Parameters::TARGET_64_BIG
:
2662 this->sized_write_globals
<64, true>(sympool
, dynpool
, symtab_xindex
,
2671 // Write out the global symbols.
2673 template<int size
, bool big_endian
>
2675 Symbol_table::sized_write_globals(const Stringpool
* sympool
,
2676 const Stringpool
* dynpool
,
2677 Output_symtab_xindex
* symtab_xindex
,
2678 Output_symtab_xindex
* dynsym_xindex
,
2679 Output_file
* of
) const
2681 const Target
& target
= parameters
->target();
2683 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
2685 const unsigned int output_count
= this->output_count_
;
2686 const section_size_type oview_size
= output_count
* sym_size
;
2687 const unsigned int first_global_index
= this->first_global_index_
;
2688 unsigned char* psyms
;
2689 if (this->offset_
== 0 || output_count
== 0)
2692 psyms
= of
->get_output_view(this->offset_
, oview_size
);
2694 const unsigned int dynamic_count
= this->dynamic_count_
;
2695 const section_size_type dynamic_size
= dynamic_count
* sym_size
;
2696 const unsigned int first_dynamic_global_index
=
2697 this->first_dynamic_global_index_
;
2698 unsigned char* dynamic_view
;
2699 if (this->dynamic_offset_
== 0 || dynamic_count
== 0)
2700 dynamic_view
= NULL
;
2702 dynamic_view
= of
->get_output_view(this->dynamic_offset_
, dynamic_size
);
2704 for (Symbol_table_type::const_iterator p
= this->table_
.begin();
2705 p
!= this->table_
.end();
2708 Sized_symbol
<size
>* sym
= static_cast<Sized_symbol
<size
>*>(p
->second
);
2710 // Possibly warn about unresolved symbols in shared libraries.
2711 this->warn_about_undefined_dynobj_symbol(sym
);
2713 unsigned int sym_index
= sym
->symtab_index();
2714 unsigned int dynsym_index
;
2715 if (dynamic_view
== NULL
)
2718 dynsym_index
= sym
->dynsym_index();
2720 if (sym_index
== -1U && dynsym_index
== -1U)
2722 // This symbol is not included in the output file.
2727 typename
elfcpp::Elf_types
<size
>::Elf_Addr sym_value
= sym
->value();
2728 typename
elfcpp::Elf_types
<size
>::Elf_Addr dynsym_value
= sym_value
;
2729 elfcpp::STB binding
= sym
->binding();
2730 switch (sym
->source())
2732 case Symbol::FROM_OBJECT
:
2735 unsigned int in_shndx
= sym
->shndx(&is_ordinary
);
2738 && in_shndx
!= elfcpp::SHN_ABS
2739 && !Symbol::is_common_shndx(in_shndx
))
2741 gold_error(_("%s: unsupported symbol section 0x%x"),
2742 sym
->demangled_name().c_str(), in_shndx
);
2747 Object
* symobj
= sym
->object();
2748 if (symobj
->is_dynamic())
2750 if (sym
->needs_dynsym_value())
2751 dynsym_value
= target
.dynsym_value(sym
);
2752 shndx
= elfcpp::SHN_UNDEF
;
2753 if (sym
->is_undef_binding_weak())
2754 binding
= elfcpp::STB_WEAK
;
2756 binding
= elfcpp::STB_GLOBAL
;
2758 else if (symobj
->pluginobj() != NULL
)
2759 shndx
= elfcpp::SHN_UNDEF
;
2760 else if (in_shndx
== elfcpp::SHN_UNDEF
2762 && (in_shndx
== elfcpp::SHN_ABS
2763 || Symbol::is_common_shndx(in_shndx
))))
2767 Relobj
* relobj
= static_cast<Relobj
*>(symobj
);
2768 Output_section
* os
= relobj
->output_section(in_shndx
);
2769 if (this->is_section_folded(relobj
, in_shndx
))
2771 // This global symbol must be written out even though
2773 // Get the os of the section it is folded onto.
2775 this->icf_
->get_folded_section(relobj
, in_shndx
);
2776 gold_assert(folded
.first
!=NULL
);
2777 Relobj
* folded_obj
=
2778 reinterpret_cast<Relobj
*>(folded
.first
);
2779 os
= folded_obj
->output_section(folded
.second
);
2780 gold_assert(os
!= NULL
);
2782 gold_assert(os
!= NULL
);
2783 shndx
= os
->out_shndx();
2785 if (shndx
>= elfcpp::SHN_LORESERVE
)
2787 if (sym_index
!= -1U)
2788 symtab_xindex
->add(sym_index
, shndx
);
2789 if (dynsym_index
!= -1U)
2790 dynsym_xindex
->add(dynsym_index
, shndx
);
2791 shndx
= elfcpp::SHN_XINDEX
;
2794 // In object files symbol values are section
2796 if (parameters
->options().relocatable())
2797 sym_value
-= os
->address();
2803 case Symbol::IN_OUTPUT_DATA
:
2804 shndx
= sym
->output_data()->out_shndx();
2805 if (shndx
>= elfcpp::SHN_LORESERVE
)
2807 if (sym_index
!= -1U)
2808 symtab_xindex
->add(sym_index
, shndx
);
2809 if (dynsym_index
!= -1U)
2810 dynsym_xindex
->add(dynsym_index
, shndx
);
2811 shndx
= elfcpp::SHN_XINDEX
;
2815 case Symbol::IN_OUTPUT_SEGMENT
:
2816 shndx
= elfcpp::SHN_ABS
;
2819 case Symbol::IS_CONSTANT
:
2820 shndx
= elfcpp::SHN_ABS
;
2823 case Symbol::IS_UNDEFINED
:
2824 shndx
= elfcpp::SHN_UNDEF
;
2831 if (sym_index
!= -1U)
2833 sym_index
-= first_global_index
;
2834 gold_assert(sym_index
< output_count
);
2835 unsigned char* ps
= psyms
+ (sym_index
* sym_size
);
2836 this->sized_write_symbol
<size
, big_endian
>(sym
, sym_value
, shndx
,
2837 binding
, sympool
, ps
);
2840 if (dynsym_index
!= -1U)
2842 dynsym_index
-= first_dynamic_global_index
;
2843 gold_assert(dynsym_index
< dynamic_count
);
2844 unsigned char* pd
= dynamic_view
+ (dynsym_index
* sym_size
);
2845 this->sized_write_symbol
<size
, big_endian
>(sym
, dynsym_value
, shndx
,
2846 binding
, dynpool
, pd
);
2850 of
->write_output_view(this->offset_
, oview_size
, psyms
);
2851 if (dynamic_view
!= NULL
)
2852 of
->write_output_view(this->dynamic_offset_
, dynamic_size
, dynamic_view
);
2855 // Write out the symbol SYM, in section SHNDX, to P. POOL is the
2856 // strtab holding the name.
2858 template<int size
, bool big_endian
>
2860 Symbol_table::sized_write_symbol(
2861 Sized_symbol
<size
>* sym
,
2862 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
,
2864 elfcpp::STB binding
,
2865 const Stringpool
* pool
,
2866 unsigned char* p
) const
2868 elfcpp::Sym_write
<size
, big_endian
> osym(p
);
2869 osym
.put_st_name(pool
->get_offset(sym
->name()));
2870 osym
.put_st_value(value
);
2871 // Use a symbol size of zero for undefined symbols from shared libraries.
2872 if (shndx
== elfcpp::SHN_UNDEF
&& sym
->is_from_dynobj())
2873 osym
.put_st_size(0);
2875 osym
.put_st_size(sym
->symsize());
2876 elfcpp::STT type
= sym
->type();
2877 // Turn IFUNC symbols from shared libraries into normal FUNC symbols.
2878 if (type
== elfcpp::STT_GNU_IFUNC
2879 && sym
->is_from_dynobj())
2880 type
= elfcpp::STT_FUNC
;
2881 // A version script may have overridden the default binding.
2882 if (sym
->is_forced_local())
2883 osym
.put_st_info(elfcpp::elf_st_info(elfcpp::STB_LOCAL
, type
));
2885 osym
.put_st_info(elfcpp::elf_st_info(binding
, type
));
2886 osym
.put_st_other(elfcpp::elf_st_other(sym
->visibility(), sym
->nonvis()));
2887 osym
.put_st_shndx(shndx
);
2890 // Check for unresolved symbols in shared libraries. This is
2891 // controlled by the --allow-shlib-undefined option.
2893 // We only warn about libraries for which we have seen all the
2894 // DT_NEEDED entries. We don't try to track down DT_NEEDED entries
2895 // which were not seen in this link. If we didn't see a DT_NEEDED
2896 // entry, we aren't going to be able to reliably report whether the
2897 // symbol is undefined.
2899 // We also don't warn about libraries found in a system library
2900 // directory (e.g., /lib or /usr/lib); we assume that those libraries
2901 // are OK. This heuristic avoids problems on GNU/Linux, in which -ldl
2902 // can have undefined references satisfied by ld-linux.so.
2905 Symbol_table::warn_about_undefined_dynobj_symbol(Symbol
* sym
) const
2908 if (sym
->source() == Symbol::FROM_OBJECT
2909 && sym
->object()->is_dynamic()
2910 && sym
->shndx(&dummy
) == elfcpp::SHN_UNDEF
2911 && sym
->binding() != elfcpp::STB_WEAK
2912 && !parameters
->options().allow_shlib_undefined()
2913 && !parameters
->target().is_defined_by_abi(sym
)
2914 && !sym
->object()->is_in_system_directory())
2916 // A very ugly cast.
2917 Dynobj
* dynobj
= static_cast<Dynobj
*>(sym
->object());
2918 if (!dynobj
->has_unknown_needed_entries())
2919 gold_undefined_symbol(sym
);
2923 // Write out a section symbol. Return the update offset.
2926 Symbol_table::write_section_symbol(const Output_section
* os
,
2927 Output_symtab_xindex
* symtab_xindex
,
2931 switch (parameters
->size_and_endianness())
2933 #ifdef HAVE_TARGET_32_LITTLE
2934 case Parameters::TARGET_32_LITTLE
:
2935 this->sized_write_section_symbol
<32, false>(os
, symtab_xindex
, of
,
2939 #ifdef HAVE_TARGET_32_BIG
2940 case Parameters::TARGET_32_BIG
:
2941 this->sized_write_section_symbol
<32, true>(os
, symtab_xindex
, of
,
2945 #ifdef HAVE_TARGET_64_LITTLE
2946 case Parameters::TARGET_64_LITTLE
:
2947 this->sized_write_section_symbol
<64, false>(os
, symtab_xindex
, of
,
2951 #ifdef HAVE_TARGET_64_BIG
2952 case Parameters::TARGET_64_BIG
:
2953 this->sized_write_section_symbol
<64, true>(os
, symtab_xindex
, of
,
2962 // Write out a section symbol, specialized for size and endianness.
2964 template<int size
, bool big_endian
>
2966 Symbol_table::sized_write_section_symbol(const Output_section
* os
,
2967 Output_symtab_xindex
* symtab_xindex
,
2971 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
2973 unsigned char* pov
= of
->get_output_view(offset
, sym_size
);
2975 elfcpp::Sym_write
<size
, big_endian
> osym(pov
);
2976 osym
.put_st_name(0);
2977 if (parameters
->options().relocatable())
2978 osym
.put_st_value(0);
2980 osym
.put_st_value(os
->address());
2981 osym
.put_st_size(0);
2982 osym
.put_st_info(elfcpp::elf_st_info(elfcpp::STB_LOCAL
,
2983 elfcpp::STT_SECTION
));
2984 osym
.put_st_other(elfcpp::elf_st_other(elfcpp::STV_DEFAULT
, 0));
2986 unsigned int shndx
= os
->out_shndx();
2987 if (shndx
>= elfcpp::SHN_LORESERVE
)
2989 symtab_xindex
->add(os
->symtab_index(), shndx
);
2990 shndx
= elfcpp::SHN_XINDEX
;
2992 osym
.put_st_shndx(shndx
);
2994 of
->write_output_view(offset
, sym_size
, pov
);
2997 // Print statistical information to stderr. This is used for --stats.
3000 Symbol_table::print_stats() const
3002 #if defined(HAVE_TR1_UNORDERED_MAP) || defined(HAVE_EXT_HASH_MAP)
3003 fprintf(stderr
, _("%s: symbol table entries: %zu; buckets: %zu\n"),
3004 program_name
, this->table_
.size(), this->table_
.bucket_count());
3006 fprintf(stderr
, _("%s: symbol table entries: %zu\n"),
3007 program_name
, this->table_
.size());
3009 this->namepool_
.print_stats("symbol table stringpool");
3012 // We check for ODR violations by looking for symbols with the same
3013 // name for which the debugging information reports that they were
3014 // defined in different source locations. When comparing the source
3015 // location, we consider instances with the same base filename to be
3016 // the same. This is because different object files/shared libraries
3017 // can include the same header file using different paths, and
3018 // different optimization settings can make the line number appear to
3019 // be a couple lines off, and we don't want to report an ODR violation
3022 // This struct is used to compare line information, as returned by
3023 // Dwarf_line_info::one_addr2line. It implements a < comparison
3024 // operator used with std::set.
3026 struct Odr_violation_compare
3029 operator()(const std::string
& s1
, const std::string
& s2
) const
3031 // Inputs should be of the form "dirname/filename:linenum" where
3032 // "dirname/" is optional. We want to compare just the filename.
3034 // Find the last '/' and ':' in each string.
3035 std::string::size_type s1begin
= s1
.rfind('/');
3036 std::string::size_type s2begin
= s2
.rfind('/');
3037 std::string::size_type s1end
= s1
.rfind(':');
3038 std::string::size_type s2end
= s2
.rfind(':');
3039 // If there was no '/' in a string, start at the beginning.
3040 if (s1begin
== std::string::npos
)
3042 if (s2begin
== std::string::npos
)
3044 // If the ':' appeared in the directory name, compare to the end
3046 if (s1end
< s1begin
)
3048 if (s2end
< s2begin
)
3050 // Compare takes lengths, not end indices.
3051 return s1
.compare(s1begin
, s1end
- s1begin
,
3052 s2
, s2begin
, s2end
- s2begin
) < 0;
3056 // Check candidate_odr_violations_ to find symbols with the same name
3057 // but apparently different definitions (different source-file/line-no).
3060 Symbol_table::detect_odr_violations(const Task
* task
,
3061 const char* output_file_name
) const
3063 for (Odr_map::const_iterator it
= candidate_odr_violations_
.begin();
3064 it
!= candidate_odr_violations_
.end();
3067 const char* symbol_name
= it
->first
;
3068 // Maps from symbol location to a sample object file we found
3069 // that location in. We use a sorted map so the location order
3070 // is deterministic, but we only store an arbitrary object file
3071 // to avoid copying lots of names.
3072 std::map
<std::string
, std::string
, Odr_violation_compare
> line_nums
;
3074 for (Unordered_set
<Symbol_location
, Symbol_location_hash
>::const_iterator
3075 locs
= it
->second
.begin();
3076 locs
!= it
->second
.end();
3079 // We need to lock the object in order to read it. This
3080 // means that we have to run in a singleton Task. If we
3081 // want to run this in a general Task for better
3082 // performance, we will need one Task for object, plus
3083 // appropriate locking to ensure that we don't conflict with
3084 // other uses of the object. Also note, one_addr2line is not
3085 // currently thread-safe.
3086 Task_lock_obj
<Object
> tl(task
, locs
->object
);
3087 // 16 is the size of the object-cache that one_addr2line should use.
3088 std::string lineno
= Dwarf_line_info::one_addr2line(
3089 locs
->object
, locs
->shndx
, locs
->offset
, 16);
3090 if (!lineno
.empty())
3092 std::string
& sample_object
= line_nums
[lineno
];
3093 if (sample_object
.empty())
3094 sample_object
= locs
->object
->name();
3098 if (line_nums
.size() > 1)
3100 gold_warning(_("while linking %s: symbol '%s' defined in multiple "
3101 "places (possible ODR violation):"),
3102 output_file_name
, demangle(symbol_name
).c_str());
3103 for (std::map
<std::string
, std::string
>::const_iterator it2
=
3105 it2
!= line_nums
.end();
3107 fprintf(stderr
, _(" %s from %s\n"),
3108 it2
->first
.c_str(), it2
->second
.c_str());
3111 // We only call one_addr2line() in this function, so we can clear its cache.
3112 Dwarf_line_info::clear_addr2line_cache();
3115 // Warnings functions.
3117 // Add a new warning.
3120 Warnings::add_warning(Symbol_table
* symtab
, const char* name
, Object
* obj
,
3121 const std::string
& warning
)
3123 name
= symtab
->canonicalize_name(name
);
3124 this->warnings_
[name
].set(obj
, warning
);
3127 // Look through the warnings and mark the symbols for which we should
3128 // warn. This is called during Layout::finalize when we know the
3129 // sources for all the symbols.
3132 Warnings::note_warnings(Symbol_table
* symtab
)
3134 for (Warning_table::iterator p
= this->warnings_
.begin();
3135 p
!= this->warnings_
.end();
3138 Symbol
* sym
= symtab
->lookup(p
->first
, NULL
);
3140 && sym
->source() == Symbol::FROM_OBJECT
3141 && sym
->object() == p
->second
.object
)
3142 sym
->set_has_warning();
3146 // Issue a warning. This is called when we see a relocation against a
3147 // symbol for which has a warning.
3149 template<int size
, bool big_endian
>
3151 Warnings::issue_warning(const Symbol
* sym
,
3152 const Relocate_info
<size
, big_endian
>* relinfo
,
3153 size_t relnum
, off_t reloffset
) const
3155 gold_assert(sym
->has_warning());
3156 Warning_table::const_iterator p
= this->warnings_
.find(sym
->name());
3157 gold_assert(p
!= this->warnings_
.end());
3158 gold_warning_at_location(relinfo
, relnum
, reloffset
,
3159 "%s", p
->second
.text
.c_str());
3162 // Instantiate the templates we need. We could use the configure
3163 // script to restrict this to only the ones needed for implemented
3166 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
3169 Sized_symbol
<32>::allocate_common(Output_data
*, Value_type
);
3172 #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
3175 Sized_symbol
<64>::allocate_common(Output_data
*, Value_type
);
3178 #ifdef HAVE_TARGET_32_LITTLE
3181 Symbol_table::add_from_relobj
<32, false>(
3182 Sized_relobj
<32, false>* relobj
,
3183 const unsigned char* syms
,
3185 size_t symndx_offset
,
3186 const char* sym_names
,
3187 size_t sym_name_size
,
3188 Sized_relobj
<32, false>::Symbols
* sympointers
,
3192 #ifdef HAVE_TARGET_32_BIG
3195 Symbol_table::add_from_relobj
<32, true>(
3196 Sized_relobj
<32, true>* relobj
,
3197 const unsigned char* syms
,
3199 size_t symndx_offset
,
3200 const char* sym_names
,
3201 size_t sym_name_size
,
3202 Sized_relobj
<32, true>::Symbols
* sympointers
,
3206 #ifdef HAVE_TARGET_64_LITTLE
3209 Symbol_table::add_from_relobj
<64, false>(
3210 Sized_relobj
<64, false>* relobj
,
3211 const unsigned char* syms
,
3213 size_t symndx_offset
,
3214 const char* sym_names
,
3215 size_t sym_name_size
,
3216 Sized_relobj
<64, false>::Symbols
* sympointers
,
3220 #ifdef HAVE_TARGET_64_BIG
3223 Symbol_table::add_from_relobj
<64, true>(
3224 Sized_relobj
<64, true>* relobj
,
3225 const unsigned char* syms
,
3227 size_t symndx_offset
,
3228 const char* sym_names
,
3229 size_t sym_name_size
,
3230 Sized_relobj
<64, true>::Symbols
* sympointers
,
3234 #ifdef HAVE_TARGET_32_LITTLE
3237 Symbol_table::add_from_pluginobj
<32, false>(
3238 Sized_pluginobj
<32, false>* obj
,
3241 elfcpp::Sym
<32, false>* sym
);
3244 #ifdef HAVE_TARGET_32_BIG
3247 Symbol_table::add_from_pluginobj
<32, true>(
3248 Sized_pluginobj
<32, true>* obj
,
3251 elfcpp::Sym
<32, true>* sym
);
3254 #ifdef HAVE_TARGET_64_LITTLE
3257 Symbol_table::add_from_pluginobj
<64, false>(
3258 Sized_pluginobj
<64, false>* obj
,
3261 elfcpp::Sym
<64, false>* sym
);
3264 #ifdef HAVE_TARGET_64_BIG
3267 Symbol_table::add_from_pluginobj
<64, true>(
3268 Sized_pluginobj
<64, true>* obj
,
3271 elfcpp::Sym
<64, true>* sym
);
3274 #ifdef HAVE_TARGET_32_LITTLE
3277 Symbol_table::add_from_dynobj
<32, false>(
3278 Sized_dynobj
<32, false>* dynobj
,
3279 const unsigned char* syms
,
3281 const char* sym_names
,
3282 size_t sym_name_size
,
3283 const unsigned char* versym
,
3285 const std::vector
<const char*>* version_map
,
3286 Sized_relobj
<32, false>::Symbols
* sympointers
,
3290 #ifdef HAVE_TARGET_32_BIG
3293 Symbol_table::add_from_dynobj
<32, true>(
3294 Sized_dynobj
<32, true>* dynobj
,
3295 const unsigned char* syms
,
3297 const char* sym_names
,
3298 size_t sym_name_size
,
3299 const unsigned char* versym
,
3301 const std::vector
<const char*>* version_map
,
3302 Sized_relobj
<32, true>::Symbols
* sympointers
,
3306 #ifdef HAVE_TARGET_64_LITTLE
3309 Symbol_table::add_from_dynobj
<64, false>(
3310 Sized_dynobj
<64, false>* dynobj
,
3311 const unsigned char* syms
,
3313 const char* sym_names
,
3314 size_t sym_name_size
,
3315 const unsigned char* versym
,
3317 const std::vector
<const char*>* version_map
,
3318 Sized_relobj
<64, false>::Symbols
* sympointers
,
3322 #ifdef HAVE_TARGET_64_BIG
3325 Symbol_table::add_from_dynobj
<64, true>(
3326 Sized_dynobj
<64, true>* dynobj
,
3327 const unsigned char* syms
,
3329 const char* sym_names
,
3330 size_t sym_name_size
,
3331 const unsigned char* versym
,
3333 const std::vector
<const char*>* version_map
,
3334 Sized_relobj
<64, true>::Symbols
* sympointers
,
3338 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
3341 Symbol_table::define_with_copy_reloc
<32>(
3342 Sized_symbol
<32>* sym
,
3344 elfcpp::Elf_types
<32>::Elf_Addr value
);
3347 #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
3350 Symbol_table::define_with_copy_reloc
<64>(
3351 Sized_symbol
<64>* sym
,
3353 elfcpp::Elf_types
<64>::Elf_Addr value
);
3356 #ifdef HAVE_TARGET_32_LITTLE
3359 Warnings::issue_warning
<32, false>(const Symbol
* sym
,
3360 const Relocate_info
<32, false>* relinfo
,
3361 size_t relnum
, off_t reloffset
) const;
3364 #ifdef HAVE_TARGET_32_BIG
3367 Warnings::issue_warning
<32, true>(const Symbol
* sym
,
3368 const Relocate_info
<32, true>* relinfo
,
3369 size_t relnum
, off_t reloffset
) const;
3372 #ifdef HAVE_TARGET_64_LITTLE
3375 Warnings::issue_warning
<64, false>(const Symbol
* sym
,
3376 const Relocate_info
<64, false>* relinfo
,
3377 size_t relnum
, off_t reloffset
) const;
3380 #ifdef HAVE_TARGET_64_BIG
3383 Warnings::issue_warning
<64, true>(const Symbol
* sym
,
3384 const Relocate_info
<64, true>* relinfo
,
3385 size_t relnum
, off_t reloffset
) const;
3388 } // End namespace gold.