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 only present on plugin files, the plugin decided we
315 if (!this->in_real_elf())
318 // If the symbol is used by a dynamic relocation, we need to add it.
319 if (this->needs_dynsym_entry())
322 // If this symbol's section is not added, the symbol need not be added.
323 // The section may have been GCed. Note that export_dynamic is being
324 // overridden here. This should not be done for shared objects.
325 if (parameters
->options().gc_sections()
326 && !parameters
->options().shared()
327 && this->source() == Symbol::FROM_OBJECT
328 && !this->object()->is_dynamic())
330 Relobj
* relobj
= static_cast<Relobj
*>(this->object());
332 unsigned int shndx
= this->shndx(&is_ordinary
);
333 if (is_ordinary
&& shndx
!= elfcpp::SHN_UNDEF
334 && !relobj
->is_section_included(shndx
)
335 && !symtab
->is_section_folded(relobj
, shndx
))
339 // If the symbol was forced local in a version script, do not add it.
340 if (this->is_forced_local())
343 // If the symbol was forced dynamic in a --dynamic-list file, add it.
344 if (parameters
->options().in_dynamic_list(this->name()))
347 // If dynamic-list-data was specified, add any STT_OBJECT.
348 if (parameters
->options().dynamic_list_data()
349 && !this->is_from_dynobj()
350 && this->type() == elfcpp::STT_OBJECT
)
353 // If --dynamic-list-cpp-new was specified, add any new/delete symbol.
354 // If --dynamic-list-cpp-typeinfo was specified, add any typeinfo symbols.
355 if ((parameters
->options().dynamic_list_cpp_new()
356 || parameters
->options().dynamic_list_cpp_typeinfo())
357 && !this->is_from_dynobj())
359 // TODO(csilvers): We could probably figure out if we're an operator
360 // new/delete or typeinfo without the need to demangle.
361 char* demangled_name
= cplus_demangle(this->name(),
362 DMGL_ANSI
| DMGL_PARAMS
);
363 if (demangled_name
== NULL
)
365 // Not a C++ symbol, so it can't satisfy these flags
367 else if (parameters
->options().dynamic_list_cpp_new()
368 && (strprefix(demangled_name
, "operator new")
369 || strprefix(demangled_name
, "operator delete")))
371 free(demangled_name
);
374 else if (parameters
->options().dynamic_list_cpp_typeinfo()
375 && (strprefix(demangled_name
, "typeinfo name for")
376 || strprefix(demangled_name
, "typeinfo for")))
378 free(demangled_name
);
382 free(demangled_name
);
385 // If exporting all symbols or building a shared library,
386 // and the symbol is defined in a regular object and is
387 // externally visible, we need to add it.
388 if ((parameters
->options().export_dynamic() || parameters
->options().shared())
389 && !this->is_from_dynobj()
390 && this->is_externally_visible())
396 // Return true if the final value of this symbol is known at link
400 Symbol::final_value_is_known() const
402 // If we are not generating an executable, then no final values are
403 // known, since they will change at runtime.
404 if (parameters
->options().output_is_position_independent()
405 || parameters
->options().relocatable())
408 // If the symbol is not from an object file, and is not undefined,
409 // then it is defined, and known.
410 if (this->source_
!= FROM_OBJECT
)
412 if (this->source_
!= IS_UNDEFINED
)
417 // If the symbol is from a dynamic object, then the final value
419 if (this->object()->is_dynamic())
422 // If the symbol is not undefined (it is defined or common),
423 // then the final value is known.
424 if (!this->is_undefined())
428 // If the symbol is undefined, then whether the final value is known
429 // depends on whether we are doing a static link. If we are doing a
430 // dynamic link, then the final value could be filled in at runtime.
431 // This could reasonably be the case for a weak undefined symbol.
432 return parameters
->doing_static_link();
435 // Return the output section where this symbol is defined.
438 Symbol::output_section() const
440 switch (this->source_
)
444 unsigned int shndx
= this->u_
.from_object
.shndx
;
445 if (shndx
!= elfcpp::SHN_UNDEF
&& this->is_ordinary_shndx_
)
447 gold_assert(!this->u_
.from_object
.object
->is_dynamic());
448 gold_assert(this->u_
.from_object
.object
->pluginobj() == NULL
);
449 Relobj
* relobj
= static_cast<Relobj
*>(this->u_
.from_object
.object
);
450 return relobj
->output_section(shndx
);
456 return this->u_
.in_output_data
.output_data
->output_section();
458 case IN_OUTPUT_SEGMENT
:
468 // Set the symbol's output section. This is used for symbols defined
469 // in scripts. This should only be called after the symbol table has
473 Symbol::set_output_section(Output_section
* os
)
475 switch (this->source_
)
479 gold_assert(this->output_section() == os
);
482 this->source_
= IN_OUTPUT_DATA
;
483 this->u_
.in_output_data
.output_data
= os
;
484 this->u_
.in_output_data
.offset_is_from_end
= false;
486 case IN_OUTPUT_SEGMENT
:
493 // Class Symbol_table.
495 Symbol_table::Symbol_table(unsigned int count
,
496 const Version_script_info
& version_script
)
497 : saw_undefined_(0), offset_(0), table_(count
), namepool_(),
498 forwarders_(), commons_(), tls_commons_(), small_commons_(),
499 large_commons_(), forced_locals_(), warnings_(),
500 version_script_(version_script
), gc_(NULL
), icf_(NULL
)
502 namepool_
.reserve(count
);
505 Symbol_table::~Symbol_table()
509 // The symbol table key equality function. This is called with
513 Symbol_table::Symbol_table_eq::operator()(const Symbol_table_key
& k1
,
514 const Symbol_table_key
& k2
) const
516 return k1
.first
== k2
.first
&& k1
.second
== k2
.second
;
520 Symbol_table::is_section_folded(Object
* obj
, unsigned int shndx
) const
522 return (parameters
->options().icf_enabled()
523 && this->icf_
->is_section_folded(obj
, shndx
));
526 // For symbols that have been listed with -u option, add them to the
527 // work list to avoid gc'ing them.
530 Symbol_table::gc_mark_undef_symbols(Layout
* layout
)
532 for (options::String_set::const_iterator p
=
533 parameters
->options().undefined_begin();
534 p
!= parameters
->options().undefined_end();
537 const char* name
= p
->c_str();
538 Symbol
* sym
= this->lookup(name
);
539 gold_assert(sym
!= NULL
);
540 if (sym
->source() == Symbol::FROM_OBJECT
541 && !sym
->object()->is_dynamic())
543 Relobj
* obj
= static_cast<Relobj
*>(sym
->object());
545 unsigned int shndx
= sym
->shndx(&is_ordinary
);
548 gold_assert(this->gc_
!= NULL
);
549 this->gc_
->worklist().push(Section_id(obj
, shndx
));
554 for (Script_options::referenced_const_iterator p
=
555 layout
->script_options()->referenced_begin();
556 p
!= layout
->script_options()->referenced_end();
559 Symbol
* sym
= this->lookup(p
->c_str());
560 gold_assert(sym
!= NULL
);
561 if (sym
->source() == Symbol::FROM_OBJECT
562 && !sym
->object()->is_dynamic())
564 Relobj
* obj
= static_cast<Relobj
*>(sym
->object());
566 unsigned int shndx
= sym
->shndx(&is_ordinary
);
569 gold_assert(this->gc_
!= NULL
);
570 this->gc_
->worklist().push(Section_id(obj
, shndx
));
577 Symbol_table::gc_mark_symbol_for_shlib(Symbol
* sym
)
579 if (!sym
->is_from_dynobj()
580 && sym
->is_externally_visible())
582 //Add the object and section to the work list.
583 Relobj
* obj
= static_cast<Relobj
*>(sym
->object());
585 unsigned int shndx
= sym
->shndx(&is_ordinary
);
586 if (is_ordinary
&& shndx
!= elfcpp::SHN_UNDEF
)
588 gold_assert(this->gc_
!= NULL
);
589 this->gc_
->worklist().push(Section_id(obj
, shndx
));
594 // When doing garbage collection, keep symbols that have been seen in
597 Symbol_table::gc_mark_dyn_syms(Symbol
* sym
)
599 if (sym
->in_dyn() && sym
->source() == Symbol::FROM_OBJECT
600 && !sym
->object()->is_dynamic())
602 Relobj
* obj
= static_cast<Relobj
*>(sym
->object());
604 unsigned int shndx
= sym
->shndx(&is_ordinary
);
605 if (is_ordinary
&& shndx
!= elfcpp::SHN_UNDEF
)
607 gold_assert(this->gc_
!= NULL
);
608 this->gc_
->worklist().push(Section_id(obj
, shndx
));
613 // Make TO a symbol which forwards to FROM.
616 Symbol_table::make_forwarder(Symbol
* from
, Symbol
* to
)
618 gold_assert(from
!= to
);
619 gold_assert(!from
->is_forwarder() && !to
->is_forwarder());
620 this->forwarders_
[from
] = to
;
621 from
->set_forwarder();
624 // Resolve the forwards from FROM, returning the real symbol.
627 Symbol_table::resolve_forwards(const Symbol
* from
) const
629 gold_assert(from
->is_forwarder());
630 Unordered_map
<const Symbol
*, Symbol
*>::const_iterator p
=
631 this->forwarders_
.find(from
);
632 gold_assert(p
!= this->forwarders_
.end());
636 // Look up a symbol by name.
639 Symbol_table::lookup(const char* name
, const char* version
) const
641 Stringpool::Key name_key
;
642 name
= this->namepool_
.find(name
, &name_key
);
646 Stringpool::Key version_key
= 0;
649 version
= this->namepool_
.find(version
, &version_key
);
654 Symbol_table_key
key(name_key
, version_key
);
655 Symbol_table::Symbol_table_type::const_iterator p
= this->table_
.find(key
);
656 if (p
== this->table_
.end())
661 // Resolve a Symbol with another Symbol. This is only used in the
662 // unusual case where there are references to both an unversioned
663 // symbol and a symbol with a version, and we then discover that that
664 // version is the default version. Because this is unusual, we do
665 // this the slow way, by converting back to an ELF symbol.
667 template<int size
, bool big_endian
>
669 Symbol_table::resolve(Sized_symbol
<size
>* to
, const Sized_symbol
<size
>* from
)
671 unsigned char buf
[elfcpp::Elf_sizes
<size
>::sym_size
];
672 elfcpp::Sym_write
<size
, big_endian
> esym(buf
);
673 // We don't bother to set the st_name or the st_shndx field.
674 esym
.put_st_value(from
->value());
675 esym
.put_st_size(from
->symsize());
676 esym
.put_st_info(from
->binding(), from
->type());
677 esym
.put_st_other(from
->visibility(), from
->nonvis());
679 unsigned int shndx
= from
->shndx(&is_ordinary
);
680 this->resolve(to
, esym
.sym(), shndx
, is_ordinary
, shndx
, from
->object(),
686 if (parameters
->options().gc_sections())
687 this->gc_mark_dyn_syms(to
);
690 // Record that a symbol is forced to be local by a version script or
694 Symbol_table::force_local(Symbol
* sym
)
696 if (!sym
->is_defined() && !sym
->is_common())
698 if (sym
->is_forced_local())
700 // We already got this one.
703 sym
->set_is_forced_local();
704 this->forced_locals_
.push_back(sym
);
707 // Adjust NAME for wrapping, and update *NAME_KEY if necessary. This
708 // is only called for undefined symbols, when at least one --wrap
712 Symbol_table::wrap_symbol(const char* name
, Stringpool::Key
* name_key
)
714 // For some targets, we need to ignore a specific character when
715 // wrapping, and add it back later.
717 if (name
[0] == parameters
->target().wrap_char())
723 if (parameters
->options().is_wrap(name
))
725 // Turn NAME into __wrap_NAME.
732 // This will give us both the old and new name in NAMEPOOL_, but
733 // that is OK. Only the versions we need will wind up in the
734 // real string table in the output file.
735 return this->namepool_
.add(s
.c_str(), true, name_key
);
738 const char* const real_prefix
= "__real_";
739 const size_t real_prefix_length
= strlen(real_prefix
);
740 if (strncmp(name
, real_prefix
, real_prefix_length
) == 0
741 && parameters
->options().is_wrap(name
+ real_prefix_length
))
743 // Turn __real_NAME into NAME.
747 s
+= name
+ real_prefix_length
;
748 return this->namepool_
.add(s
.c_str(), true, name_key
);
754 // This is called when we see a symbol NAME/VERSION, and the symbol
755 // already exists in the symbol table, and VERSION is marked as being
756 // the default version. SYM is the NAME/VERSION symbol we just added.
757 // DEFAULT_IS_NEW is true if this is the first time we have seen the
758 // symbol NAME/NULL. PDEF points to the entry for NAME/NULL.
760 template<int size
, bool big_endian
>
762 Symbol_table::define_default_version(Sized_symbol
<size
>* sym
,
764 Symbol_table_type::iterator pdef
)
768 // This is the first time we have seen NAME/NULL. Make
769 // NAME/NULL point to NAME/VERSION, and mark SYM as the default
772 sym
->set_is_default();
774 else if (pdef
->second
== sym
)
776 // NAME/NULL already points to NAME/VERSION. Don't mark the
777 // symbol as the default if it is not already the default.
781 // This is the unfortunate case where we already have entries
782 // for both NAME/VERSION and NAME/NULL. We now see a symbol
783 // NAME/VERSION where VERSION is the default version. We have
784 // already resolved this new symbol with the existing
785 // NAME/VERSION symbol.
787 // It's possible that NAME/NULL and NAME/VERSION are both
788 // defined in regular objects. This can only happen if one
789 // object file defines foo and another defines foo@@ver. This
790 // is somewhat obscure, but we call it a multiple definition
793 // It's possible that NAME/NULL actually has a version, in which
794 // case it won't be the same as VERSION. This happens with
795 // ver_test_7.so in the testsuite for the symbol t2_2. We see
796 // t2_2@@VER2, so we define both t2_2/VER2 and t2_2/NULL. We
797 // then see an unadorned t2_2 in an object file and give it
798 // version VER1 from the version script. This looks like a
799 // default definition for VER1, so it looks like we should merge
800 // t2_2/NULL with t2_2/VER1. That doesn't make sense, but it's
801 // not obvious that this is an error, either. So we just punt.
803 // If one of the symbols has non-default visibility, and the
804 // other is defined in a shared object, then they are different
807 // Otherwise, we just resolve the symbols as though they were
810 if (pdef
->second
->version() != NULL
)
811 gold_assert(pdef
->second
->version() != sym
->version());
812 else if (sym
->visibility() != elfcpp::STV_DEFAULT
813 && pdef
->second
->is_from_dynobj())
815 else if (pdef
->second
->visibility() != elfcpp::STV_DEFAULT
816 && sym
->is_from_dynobj())
820 const Sized_symbol
<size
>* symdef
;
821 symdef
= this->get_sized_symbol
<size
>(pdef
->second
);
822 Symbol_table::resolve
<size
, big_endian
>(sym
, symdef
);
823 this->make_forwarder(pdef
->second
, sym
);
825 sym
->set_is_default();
830 // Add one symbol from OBJECT to the symbol table. NAME is symbol
831 // name and VERSION is the version; both are canonicalized. DEF is
832 // whether this is the default version. ST_SHNDX is the symbol's
833 // section index; IS_ORDINARY is whether this is a normal section
834 // rather than a special code.
836 // If IS_DEFAULT_VERSION is true, then this is the definition of a
837 // default version of a symbol. That means that any lookup of
838 // NAME/NULL and any lookup of NAME/VERSION should always return the
839 // same symbol. This is obvious for references, but in particular we
840 // want to do this for definitions: overriding NAME/NULL should also
841 // override NAME/VERSION. If we don't do that, it would be very hard
842 // to override functions in a shared library which uses versioning.
844 // We implement this by simply making both entries in the hash table
845 // point to the same Symbol structure. That is easy enough if this is
846 // the first time we see NAME/NULL or NAME/VERSION, but it is possible
847 // that we have seen both already, in which case they will both have
848 // independent entries in the symbol table. We can't simply change
849 // the symbol table entry, because we have pointers to the entries
850 // attached to the object files. So we mark the entry attached to the
851 // object file as a forwarder, and record it in the forwarders_ map.
852 // Note that entries in the hash table will never be marked as
855 // ORIG_ST_SHNDX and ST_SHNDX are almost always the same.
856 // ORIG_ST_SHNDX is the section index in the input file, or SHN_UNDEF
857 // for a special section code. ST_SHNDX may be modified if the symbol
858 // is defined in a section being discarded.
860 template<int size
, bool big_endian
>
862 Symbol_table::add_from_object(Object
* object
,
864 Stringpool::Key name_key
,
866 Stringpool::Key version_key
,
867 bool is_default_version
,
868 const elfcpp::Sym
<size
, big_endian
>& sym
,
869 unsigned int st_shndx
,
871 unsigned int orig_st_shndx
)
873 // Print a message if this symbol is being traced.
874 if (parameters
->options().is_trace_symbol(name
))
876 if (orig_st_shndx
== elfcpp::SHN_UNDEF
)
877 gold_info(_("%s: reference to %s"), object
->name().c_str(), name
);
879 gold_info(_("%s: definition of %s"), object
->name().c_str(), name
);
882 // For an undefined symbol, we may need to adjust the name using
884 if (orig_st_shndx
== elfcpp::SHN_UNDEF
885 && parameters
->options().any_wrap())
887 const char* wrap_name
= this->wrap_symbol(name
, &name_key
);
888 if (wrap_name
!= name
)
890 // If we see a reference to malloc with version GLIBC_2.0,
891 // and we turn it into a reference to __wrap_malloc, then we
892 // discard the version number. Otherwise the user would be
893 // required to specify the correct version for
901 Symbol
* const snull
= NULL
;
902 std::pair
<typename
Symbol_table_type::iterator
, bool> ins
=
903 this->table_
.insert(std::make_pair(std::make_pair(name_key
, version_key
),
906 std::pair
<typename
Symbol_table_type::iterator
, bool> insdefault
=
907 std::make_pair(this->table_
.end(), false);
908 if (is_default_version
)
910 const Stringpool::Key vnull_key
= 0;
911 insdefault
= this->table_
.insert(std::make_pair(std::make_pair(name_key
,
916 // ins.first: an iterator, which is a pointer to a pair.
917 // ins.first->first: the key (a pair of name and version).
918 // ins.first->second: the value (Symbol*).
919 // ins.second: true if new entry was inserted, false if not.
921 Sized_symbol
<size
>* ret
;
926 // We already have an entry for NAME/VERSION.
927 ret
= this->get_sized_symbol
<size
>(ins
.first
->second
);
928 gold_assert(ret
!= NULL
);
930 was_undefined
= ret
->is_undefined();
931 was_common
= ret
->is_common();
933 this->resolve(ret
, sym
, st_shndx
, is_ordinary
, orig_st_shndx
, object
,
935 if (parameters
->options().gc_sections())
936 this->gc_mark_dyn_syms(ret
);
938 if (is_default_version
)
939 this->define_default_version
<size
, big_endian
>(ret
, insdefault
.second
,
944 // This is the first time we have seen NAME/VERSION.
945 gold_assert(ins
.first
->second
== NULL
);
947 if (is_default_version
&& !insdefault
.second
)
949 // We already have an entry for NAME/NULL. If we override
950 // it, then change it to NAME/VERSION.
951 ret
= this->get_sized_symbol
<size
>(insdefault
.first
->second
);
953 was_undefined
= ret
->is_undefined();
954 was_common
= ret
->is_common();
956 this->resolve(ret
, sym
, st_shndx
, is_ordinary
, orig_st_shndx
, object
,
958 if (parameters
->options().gc_sections())
959 this->gc_mark_dyn_syms(ret
);
960 ins
.first
->second
= ret
;
964 was_undefined
= false;
967 Sized_target
<size
, big_endian
>* target
=
968 parameters
->sized_target
<size
, big_endian
>();
969 if (!target
->has_make_symbol())
970 ret
= new Sized_symbol
<size
>();
973 ret
= target
->make_symbol();
976 // This means that we don't want a symbol table
978 if (!is_default_version
)
979 this->table_
.erase(ins
.first
);
982 this->table_
.erase(insdefault
.first
);
983 // Inserting INSDEFAULT invalidated INS.
984 this->table_
.erase(std::make_pair(name_key
,
991 ret
->init_object(name
, version
, object
, sym
, st_shndx
, is_ordinary
);
993 ins
.first
->second
= ret
;
994 if (is_default_version
)
996 // This is the first time we have seen NAME/NULL. Point
997 // it at the new entry for NAME/VERSION.
998 gold_assert(insdefault
.second
);
999 insdefault
.first
->second
= ret
;
1003 if (is_default_version
)
1004 ret
->set_is_default();
1007 // Record every time we see a new undefined symbol, to speed up
1009 if (!was_undefined
&& ret
->is_undefined())
1011 ++this->saw_undefined_
;
1012 if (parameters
->options().has_plugins())
1013 parameters
->options().plugins()->new_undefined_symbol(ret
);
1016 // Keep track of common symbols, to speed up common symbol
1018 if (!was_common
&& ret
->is_common())
1020 if (ret
->type() == elfcpp::STT_TLS
)
1021 this->tls_commons_
.push_back(ret
);
1022 else if (!is_ordinary
1023 && st_shndx
== parameters
->target().small_common_shndx())
1024 this->small_commons_
.push_back(ret
);
1025 else if (!is_ordinary
1026 && st_shndx
== parameters
->target().large_common_shndx())
1027 this->large_commons_
.push_back(ret
);
1029 this->commons_
.push_back(ret
);
1032 // If we're not doing a relocatable link, then any symbol with
1033 // hidden or internal visibility is local.
1034 if ((ret
->visibility() == elfcpp::STV_HIDDEN
1035 || ret
->visibility() == elfcpp::STV_INTERNAL
)
1036 && (ret
->binding() == elfcpp::STB_GLOBAL
1037 || ret
->binding() == elfcpp::STB_GNU_UNIQUE
1038 || ret
->binding() == elfcpp::STB_WEAK
)
1039 && !parameters
->options().relocatable())
1040 this->force_local(ret
);
1045 // Add all the symbols in a relocatable object to the hash table.
1047 template<int size
, bool big_endian
>
1049 Symbol_table::add_from_relobj(
1050 Sized_relobj
<size
, big_endian
>* relobj
,
1051 const unsigned char* syms
,
1053 size_t symndx_offset
,
1054 const char* sym_names
,
1055 size_t sym_name_size
,
1056 typename Sized_relobj
<size
, big_endian
>::Symbols
* sympointers
,
1061 gold_assert(size
== parameters
->target().get_size());
1063 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
1065 const bool just_symbols
= relobj
->just_symbols();
1067 const unsigned char* p
= syms
;
1068 for (size_t i
= 0; i
< count
; ++i
, p
+= sym_size
)
1070 (*sympointers
)[i
] = NULL
;
1072 elfcpp::Sym
<size
, big_endian
> sym(p
);
1074 unsigned int st_name
= sym
.get_st_name();
1075 if (st_name
>= sym_name_size
)
1077 relobj
->error(_("bad global symbol name offset %u at %zu"),
1082 const char* name
= sym_names
+ st_name
;
1085 unsigned int st_shndx
= relobj
->adjust_sym_shndx(i
+ symndx_offset
,
1088 unsigned int orig_st_shndx
= st_shndx
;
1090 orig_st_shndx
= elfcpp::SHN_UNDEF
;
1092 if (st_shndx
!= elfcpp::SHN_UNDEF
)
1095 // A symbol defined in a section which we are not including must
1096 // be treated as an undefined symbol.
1097 bool is_defined_in_discarded_section
= false;
1098 if (st_shndx
!= elfcpp::SHN_UNDEF
1100 && !relobj
->is_section_included(st_shndx
)
1101 && !this->is_section_folded(relobj
, st_shndx
))
1103 st_shndx
= elfcpp::SHN_UNDEF
;
1104 is_defined_in_discarded_section
= true;
1107 // In an object file, an '@' in the name separates the symbol
1108 // name from the version name. If there are two '@' characters,
1109 // this is the default version.
1110 const char* ver
= strchr(name
, '@');
1111 Stringpool::Key ver_key
= 0;
1113 // IS_DEFAULT_VERSION: is the version default?
1114 // IS_FORCED_LOCAL: is the symbol forced local?
1115 bool is_default_version
= false;
1116 bool is_forced_local
= false;
1120 // The symbol name is of the form foo@VERSION or foo@@VERSION
1121 namelen
= ver
- name
;
1125 is_default_version
= true;
1128 ver
= this->namepool_
.add(ver
, true, &ver_key
);
1130 // We don't want to assign a version to an undefined symbol,
1131 // even if it is listed in the version script. FIXME: What
1132 // about a common symbol?
1135 namelen
= strlen(name
);
1136 if (!this->version_script_
.empty()
1137 && st_shndx
!= elfcpp::SHN_UNDEF
)
1139 // The symbol name did not have a version, but the
1140 // version script may assign a version anyway.
1141 std::string version
;
1143 if (this->version_script_
.get_symbol_version(name
, &version
,
1147 is_forced_local
= true;
1148 else if (!version
.empty())
1150 ver
= this->namepool_
.add_with_length(version
.c_str(),
1154 is_default_version
= true;
1160 elfcpp::Sym
<size
, big_endian
>* psym
= &sym
;
1161 unsigned char symbuf
[sym_size
];
1162 elfcpp::Sym
<size
, big_endian
> sym2(symbuf
);
1165 memcpy(symbuf
, p
, sym_size
);
1166 elfcpp::Sym_write
<size
, big_endian
> sw(symbuf
);
1167 if (orig_st_shndx
!= elfcpp::SHN_UNDEF
&& is_ordinary
)
1169 // Symbol values in object files are section relative.
1170 // This is normally what we want, but since here we are
1171 // converting the symbol to absolute we need to add the
1172 // section address. The section address in an object
1173 // file is normally zero, but people can use a linker
1174 // script to change it.
1175 sw
.put_st_value(sym
.get_st_value()
1176 + relobj
->section_address(orig_st_shndx
));
1178 st_shndx
= elfcpp::SHN_ABS
;
1179 is_ordinary
= false;
1183 // Fix up visibility if object has no-export set.
1184 if (relobj
->no_export()
1185 && (orig_st_shndx
!= elfcpp::SHN_UNDEF
|| !is_ordinary
))
1187 // We may have copied symbol already above.
1190 memcpy(symbuf
, p
, sym_size
);
1194 elfcpp::STV visibility
= sym2
.get_st_visibility();
1195 if (visibility
== elfcpp::STV_DEFAULT
1196 || visibility
== elfcpp::STV_PROTECTED
)
1198 elfcpp::Sym_write
<size
, big_endian
> sw(symbuf
);
1199 unsigned char nonvis
= sym2
.get_st_nonvis();
1200 sw
.put_st_other(elfcpp::STV_HIDDEN
, nonvis
);
1204 Stringpool::Key name_key
;
1205 name
= this->namepool_
.add_with_length(name
, namelen
, true,
1208 Sized_symbol
<size
>* res
;
1209 res
= this->add_from_object(relobj
, name
, name_key
, ver
, ver_key
,
1210 is_default_version
, *psym
, st_shndx
,
1211 is_ordinary
, orig_st_shndx
);
1213 // If building a shared library using garbage collection, do not
1214 // treat externally visible symbols as garbage.
1215 if (parameters
->options().gc_sections()
1216 && parameters
->options().shared())
1217 this->gc_mark_symbol_for_shlib(res
);
1219 if (is_forced_local
)
1220 this->force_local(res
);
1222 if (is_defined_in_discarded_section
)
1223 res
->set_is_defined_in_discarded_section();
1225 (*sympointers
)[i
] = res
;
1229 // Add a symbol from a plugin-claimed file.
1231 template<int size
, bool big_endian
>
1233 Symbol_table::add_from_pluginobj(
1234 Sized_pluginobj
<size
, big_endian
>* obj
,
1237 elfcpp::Sym
<size
, big_endian
>* sym
)
1239 unsigned int st_shndx
= sym
->get_st_shndx();
1240 bool is_ordinary
= st_shndx
< elfcpp::SHN_LORESERVE
;
1242 Stringpool::Key ver_key
= 0;
1243 bool is_default_version
= false;
1244 bool is_forced_local
= false;
1248 ver
= this->namepool_
.add(ver
, true, &ver_key
);
1250 // We don't want to assign a version to an undefined symbol,
1251 // even if it is listed in the version script. FIXME: What
1252 // about a common symbol?
1255 if (!this->version_script_
.empty()
1256 && st_shndx
!= elfcpp::SHN_UNDEF
)
1258 // The symbol name did not have a version, but the
1259 // version script may assign a version anyway.
1260 std::string version
;
1262 if (this->version_script_
.get_symbol_version(name
, &version
,
1266 is_forced_local
= true;
1267 else if (!version
.empty())
1269 ver
= this->namepool_
.add_with_length(version
.c_str(),
1273 is_default_version
= true;
1279 Stringpool::Key name_key
;
1280 name
= this->namepool_
.add(name
, true, &name_key
);
1282 Sized_symbol
<size
>* res
;
1283 res
= this->add_from_object(obj
, name
, name_key
, ver
, ver_key
,
1284 is_default_version
, *sym
, st_shndx
,
1285 is_ordinary
, st_shndx
);
1287 if (is_forced_local
)
1288 this->force_local(res
);
1293 // Add all the symbols in a dynamic object to the hash table.
1295 template<int size
, bool big_endian
>
1297 Symbol_table::add_from_dynobj(
1298 Sized_dynobj
<size
, big_endian
>* dynobj
,
1299 const unsigned char* syms
,
1301 const char* sym_names
,
1302 size_t sym_name_size
,
1303 const unsigned char* versym
,
1305 const std::vector
<const char*>* version_map
,
1306 typename Sized_relobj
<size
, big_endian
>::Symbols
* sympointers
,
1311 gold_assert(size
== parameters
->target().get_size());
1313 if (dynobj
->just_symbols())
1315 gold_error(_("--just-symbols does not make sense with a shared object"));
1319 if (versym
!= NULL
&& versym_size
/ 2 < count
)
1321 dynobj
->error(_("too few symbol versions"));
1325 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
1327 // We keep a list of all STT_OBJECT symbols, so that we can resolve
1328 // weak aliases. This is necessary because if the dynamic object
1329 // provides the same variable under two names, one of which is a
1330 // weak definition, and the regular object refers to the weak
1331 // definition, we have to put both the weak definition and the
1332 // strong definition into the dynamic symbol table. Given a weak
1333 // definition, the only way that we can find the corresponding
1334 // strong definition, if any, is to search the symbol table.
1335 std::vector
<Sized_symbol
<size
>*> object_symbols
;
1337 const unsigned char* p
= syms
;
1338 const unsigned char* vs
= versym
;
1339 for (size_t i
= 0; i
< count
; ++i
, p
+= sym_size
, vs
+= 2)
1341 elfcpp::Sym
<size
, big_endian
> sym(p
);
1343 if (sympointers
!= NULL
)
1344 (*sympointers
)[i
] = NULL
;
1346 // Ignore symbols with local binding or that have
1347 // internal or hidden visibility.
1348 if (sym
.get_st_bind() == elfcpp::STB_LOCAL
1349 || sym
.get_st_visibility() == elfcpp::STV_INTERNAL
1350 || sym
.get_st_visibility() == elfcpp::STV_HIDDEN
)
1353 // A protected symbol in a shared library must be treated as a
1354 // normal symbol when viewed from outside the shared library.
1355 // Implement this by overriding the visibility here.
1356 elfcpp::Sym
<size
, big_endian
>* psym
= &sym
;
1357 unsigned char symbuf
[sym_size
];
1358 elfcpp::Sym
<size
, big_endian
> sym2(symbuf
);
1359 if (sym
.get_st_visibility() == elfcpp::STV_PROTECTED
)
1361 memcpy(symbuf
, p
, sym_size
);
1362 elfcpp::Sym_write
<size
, big_endian
> sw(symbuf
);
1363 sw
.put_st_other(elfcpp::STV_DEFAULT
, sym
.get_st_nonvis());
1367 unsigned int st_name
= psym
->get_st_name();
1368 if (st_name
>= sym_name_size
)
1370 dynobj
->error(_("bad symbol name offset %u at %zu"),
1375 const char* name
= sym_names
+ st_name
;
1378 unsigned int st_shndx
= dynobj
->adjust_sym_shndx(i
, psym
->get_st_shndx(),
1381 if (st_shndx
!= elfcpp::SHN_UNDEF
)
1384 Sized_symbol
<size
>* res
;
1388 Stringpool::Key name_key
;
1389 name
= this->namepool_
.add(name
, true, &name_key
);
1390 res
= this->add_from_object(dynobj
, name
, name_key
, NULL
, 0,
1391 false, *psym
, st_shndx
, is_ordinary
,
1396 // Read the version information.
1398 unsigned int v
= elfcpp::Swap
<16, big_endian
>::readval(vs
);
1400 bool hidden
= (v
& elfcpp::VERSYM_HIDDEN
) != 0;
1401 v
&= elfcpp::VERSYM_VERSION
;
1403 // The Sun documentation says that V can be VER_NDX_LOCAL,
1404 // or VER_NDX_GLOBAL, or a version index. The meaning of
1405 // VER_NDX_LOCAL is defined as "Symbol has local scope."
1406 // The old GNU linker will happily generate VER_NDX_LOCAL
1407 // for an undefined symbol. I don't know what the Sun
1408 // linker will generate.
1410 if (v
== static_cast<unsigned int>(elfcpp::VER_NDX_LOCAL
)
1411 && st_shndx
!= elfcpp::SHN_UNDEF
)
1413 // This symbol should not be visible outside the object.
1417 // At this point we are definitely going to add this symbol.
1418 Stringpool::Key name_key
;
1419 name
= this->namepool_
.add(name
, true, &name_key
);
1421 if (v
== static_cast<unsigned int>(elfcpp::VER_NDX_LOCAL
)
1422 || v
== static_cast<unsigned int>(elfcpp::VER_NDX_GLOBAL
))
1424 // This symbol does not have a version.
1425 res
= this->add_from_object(dynobj
, name
, name_key
, NULL
, 0,
1426 false, *psym
, st_shndx
, is_ordinary
,
1431 if (v
>= version_map
->size())
1433 dynobj
->error(_("versym for symbol %zu out of range: %u"),
1438 const char* version
= (*version_map
)[v
];
1439 if (version
== NULL
)
1441 dynobj
->error(_("versym for symbol %zu has no name: %u"),
1446 Stringpool::Key version_key
;
1447 version
= this->namepool_
.add(version
, true, &version_key
);
1449 // If this is an absolute symbol, and the version name
1450 // and symbol name are the same, then this is the
1451 // version definition symbol. These symbols exist to
1452 // support using -u to pull in particular versions. We
1453 // do not want to record a version for them.
1454 if (st_shndx
== elfcpp::SHN_ABS
1456 && name_key
== version_key
)
1457 res
= this->add_from_object(dynobj
, name
, name_key
, NULL
, 0,
1458 false, *psym
, st_shndx
, is_ordinary
,
1462 const bool is_default_version
=
1463 !hidden
&& st_shndx
!= elfcpp::SHN_UNDEF
;
1464 res
= this->add_from_object(dynobj
, name
, name_key
, version
,
1465 version_key
, is_default_version
,
1467 is_ordinary
, st_shndx
);
1472 // Note that it is possible that RES was overridden by an
1473 // earlier object, in which case it can't be aliased here.
1474 if (st_shndx
!= elfcpp::SHN_UNDEF
1476 && psym
->get_st_type() == elfcpp::STT_OBJECT
1477 && res
->source() == Symbol::FROM_OBJECT
1478 && res
->object() == dynobj
)
1479 object_symbols
.push_back(res
);
1481 if (sympointers
!= NULL
)
1482 (*sympointers
)[i
] = res
;
1485 this->record_weak_aliases(&object_symbols
);
1488 // This is used to sort weak aliases. We sort them first by section
1489 // index, then by offset, then by weak ahead of strong.
1492 class Weak_alias_sorter
1495 bool operator()(const Sized_symbol
<size
>*, const Sized_symbol
<size
>*) const;
1500 Weak_alias_sorter
<size
>::operator()(const Sized_symbol
<size
>* s1
,
1501 const Sized_symbol
<size
>* s2
) const
1504 unsigned int s1_shndx
= s1
->shndx(&is_ordinary
);
1505 gold_assert(is_ordinary
);
1506 unsigned int s2_shndx
= s2
->shndx(&is_ordinary
);
1507 gold_assert(is_ordinary
);
1508 if (s1_shndx
!= s2_shndx
)
1509 return s1_shndx
< s2_shndx
;
1511 if (s1
->value() != s2
->value())
1512 return s1
->value() < s2
->value();
1513 if (s1
->binding() != s2
->binding())
1515 if (s1
->binding() == elfcpp::STB_WEAK
)
1517 if (s2
->binding() == elfcpp::STB_WEAK
)
1520 return std::string(s1
->name()) < std::string(s2
->name());
1523 // SYMBOLS is a list of object symbols from a dynamic object. Look
1524 // for any weak aliases, and record them so that if we add the weak
1525 // alias to the dynamic symbol table, we also add the corresponding
1530 Symbol_table::record_weak_aliases(std::vector
<Sized_symbol
<size
>*>* symbols
)
1532 // Sort the vector by section index, then by offset, then by weak
1534 std::sort(symbols
->begin(), symbols
->end(), Weak_alias_sorter
<size
>());
1536 // Walk through the vector. For each weak definition, record
1538 for (typename
std::vector
<Sized_symbol
<size
>*>::const_iterator p
=
1540 p
!= symbols
->end();
1543 if ((*p
)->binding() != elfcpp::STB_WEAK
)
1546 // Build a circular list of weak aliases. Each symbol points to
1547 // the next one in the circular list.
1549 Sized_symbol
<size
>* from_sym
= *p
;
1550 typename
std::vector
<Sized_symbol
<size
>*>::const_iterator q
;
1551 for (q
= p
+ 1; q
!= symbols
->end(); ++q
)
1554 if ((*q
)->shndx(&dummy
) != from_sym
->shndx(&dummy
)
1555 || (*q
)->value() != from_sym
->value())
1558 this->weak_aliases_
[from_sym
] = *q
;
1559 from_sym
->set_has_alias();
1565 this->weak_aliases_
[from_sym
] = *p
;
1566 from_sym
->set_has_alias();
1573 // Create and return a specially defined symbol. If ONLY_IF_REF is
1574 // true, then only create the symbol if there is a reference to it.
1575 // If this does not return NULL, it sets *POLDSYM to the existing
1576 // symbol if there is one. This sets *RESOLVE_OLDSYM if we should
1577 // resolve the newly created symbol to the old one. This
1578 // canonicalizes *PNAME and *PVERSION.
1580 template<int size
, bool big_endian
>
1582 Symbol_table::define_special_symbol(const char** pname
, const char** pversion
,
1584 Sized_symbol
<size
>** poldsym
,
1585 bool* resolve_oldsym
)
1587 *resolve_oldsym
= false;
1589 // If the caller didn't give us a version, see if we get one from
1590 // the version script.
1592 bool is_default_version
= false;
1593 if (*pversion
== NULL
)
1596 if (this->version_script_
.get_symbol_version(*pname
, &v
, &is_global
))
1598 if (is_global
&& !v
.empty())
1600 *pversion
= v
.c_str();
1601 // If we get the version from a version script, then we
1602 // are also the default version.
1603 is_default_version
= true;
1609 Sized_symbol
<size
>* sym
;
1611 bool add_to_table
= false;
1612 typename
Symbol_table_type::iterator add_loc
= this->table_
.end();
1613 bool add_def_to_table
= false;
1614 typename
Symbol_table_type::iterator add_def_loc
= this->table_
.end();
1618 oldsym
= this->lookup(*pname
, *pversion
);
1619 if (oldsym
== NULL
&& is_default_version
)
1620 oldsym
= this->lookup(*pname
, NULL
);
1621 if (oldsym
== NULL
|| !oldsym
->is_undefined())
1624 *pname
= oldsym
->name();
1625 if (!is_default_version
)
1626 *pversion
= oldsym
->version();
1630 // Canonicalize NAME and VERSION.
1631 Stringpool::Key name_key
;
1632 *pname
= this->namepool_
.add(*pname
, true, &name_key
);
1634 Stringpool::Key version_key
= 0;
1635 if (*pversion
!= NULL
)
1636 *pversion
= this->namepool_
.add(*pversion
, true, &version_key
);
1638 Symbol
* const snull
= NULL
;
1639 std::pair
<typename
Symbol_table_type::iterator
, bool> ins
=
1640 this->table_
.insert(std::make_pair(std::make_pair(name_key
,
1644 std::pair
<typename
Symbol_table_type::iterator
, bool> insdefault
=
1645 std::make_pair(this->table_
.end(), false);
1646 if (is_default_version
)
1648 const Stringpool::Key vnull
= 0;
1650 this->table_
.insert(std::make_pair(std::make_pair(name_key
,
1657 // We already have a symbol table entry for NAME/VERSION.
1658 oldsym
= ins
.first
->second
;
1659 gold_assert(oldsym
!= NULL
);
1661 if (is_default_version
)
1663 Sized_symbol
<size
>* soldsym
=
1664 this->get_sized_symbol
<size
>(oldsym
);
1665 this->define_default_version
<size
, big_endian
>(soldsym
,
1672 // We haven't seen this symbol before.
1673 gold_assert(ins
.first
->second
== NULL
);
1675 add_to_table
= true;
1676 add_loc
= ins
.first
;
1678 if (is_default_version
&& !insdefault
.second
)
1680 // We are adding NAME/VERSION, and it is the default
1681 // version. We already have an entry for NAME/NULL.
1682 oldsym
= insdefault
.first
->second
;
1683 *resolve_oldsym
= true;
1689 if (is_default_version
)
1691 add_def_to_table
= true;
1692 add_def_loc
= insdefault
.first
;
1698 const Target
& target
= parameters
->target();
1699 if (!target
.has_make_symbol())
1700 sym
= new Sized_symbol
<size
>();
1703 Sized_target
<size
, big_endian
>* sized_target
=
1704 parameters
->sized_target
<size
, big_endian
>();
1705 sym
= sized_target
->make_symbol();
1711 add_loc
->second
= sym
;
1713 gold_assert(oldsym
!= NULL
);
1715 if (add_def_to_table
)
1716 add_def_loc
->second
= sym
;
1718 *poldsym
= this->get_sized_symbol
<size
>(oldsym
);
1723 // Define a symbol based on an Output_data.
1726 Symbol_table::define_in_output_data(const char* name
,
1727 const char* version
,
1733 elfcpp::STB binding
,
1734 elfcpp::STV visibility
,
1735 unsigned char nonvis
,
1736 bool offset_is_from_end
,
1739 if (parameters
->target().get_size() == 32)
1741 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
1742 return this->do_define_in_output_data
<32>(name
, version
, defined
, od
,
1743 value
, symsize
, type
, binding
,
1751 else if (parameters
->target().get_size() == 64)
1753 #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
1754 return this->do_define_in_output_data
<64>(name
, version
, defined
, od
,
1755 value
, symsize
, type
, binding
,
1767 // Define a symbol in an Output_data, sized version.
1771 Symbol_table::do_define_in_output_data(
1773 const char* version
,
1776 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
,
1777 typename
elfcpp::Elf_types
<size
>::Elf_WXword symsize
,
1779 elfcpp::STB binding
,
1780 elfcpp::STV visibility
,
1781 unsigned char nonvis
,
1782 bool offset_is_from_end
,
1785 Sized_symbol
<size
>* sym
;
1786 Sized_symbol
<size
>* oldsym
;
1787 bool resolve_oldsym
;
1789 if (parameters
->target().is_big_endian())
1791 #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG)
1792 sym
= this->define_special_symbol
<size
, true>(&name
, &version
,
1793 only_if_ref
, &oldsym
,
1801 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE)
1802 sym
= this->define_special_symbol
<size
, false>(&name
, &version
,
1803 only_if_ref
, &oldsym
,
1813 sym
->init_output_data(name
, version
, od
, value
, symsize
, type
, binding
,
1814 visibility
, nonvis
, offset_is_from_end
);
1818 if (binding
== elfcpp::STB_LOCAL
1819 || this->version_script_
.symbol_is_local(name
))
1820 this->force_local(sym
);
1821 else if (version
!= NULL
)
1822 sym
->set_is_default();
1826 if (Symbol_table::should_override_with_special(oldsym
, defined
))
1827 this->override_with_special(oldsym
, sym
);
1838 // Define a symbol based on an Output_segment.
1841 Symbol_table::define_in_output_segment(const char* name
,
1842 const char* version
,
1848 elfcpp::STB binding
,
1849 elfcpp::STV visibility
,
1850 unsigned char nonvis
,
1851 Symbol::Segment_offset_base offset_base
,
1854 if (parameters
->target().get_size() == 32)
1856 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
1857 return this->do_define_in_output_segment
<32>(name
, version
, defined
, os
,
1858 value
, symsize
, type
,
1859 binding
, visibility
, nonvis
,
1860 offset_base
, only_if_ref
);
1865 else if (parameters
->target().get_size() == 64)
1867 #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
1868 return this->do_define_in_output_segment
<64>(name
, version
, defined
, os
,
1869 value
, symsize
, type
,
1870 binding
, visibility
, nonvis
,
1871 offset_base
, only_if_ref
);
1880 // Define a symbol in an Output_segment, sized version.
1884 Symbol_table::do_define_in_output_segment(
1886 const char* version
,
1889 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
,
1890 typename
elfcpp::Elf_types
<size
>::Elf_WXword symsize
,
1892 elfcpp::STB binding
,
1893 elfcpp::STV visibility
,
1894 unsigned char nonvis
,
1895 Symbol::Segment_offset_base offset_base
,
1898 Sized_symbol
<size
>* sym
;
1899 Sized_symbol
<size
>* oldsym
;
1900 bool resolve_oldsym
;
1902 if (parameters
->target().is_big_endian())
1904 #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG)
1905 sym
= this->define_special_symbol
<size
, true>(&name
, &version
,
1906 only_if_ref
, &oldsym
,
1914 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE)
1915 sym
= this->define_special_symbol
<size
, false>(&name
, &version
,
1916 only_if_ref
, &oldsym
,
1926 sym
->init_output_segment(name
, version
, os
, value
, symsize
, type
, binding
,
1927 visibility
, nonvis
, offset_base
);
1931 if (binding
== elfcpp::STB_LOCAL
1932 || this->version_script_
.symbol_is_local(name
))
1933 this->force_local(sym
);
1934 else if (version
!= NULL
)
1935 sym
->set_is_default();
1939 if (Symbol_table::should_override_with_special(oldsym
, defined
))
1940 this->override_with_special(oldsym
, sym
);
1951 // Define a special symbol with a constant value. It is a multiple
1952 // definition error if this symbol is already defined.
1955 Symbol_table::define_as_constant(const char* name
,
1956 const char* version
,
1961 elfcpp::STB binding
,
1962 elfcpp::STV visibility
,
1963 unsigned char nonvis
,
1965 bool force_override
)
1967 if (parameters
->target().get_size() == 32)
1969 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
1970 return this->do_define_as_constant
<32>(name
, version
, defined
, value
,
1971 symsize
, type
, binding
,
1972 visibility
, nonvis
, only_if_ref
,
1978 else if (parameters
->target().get_size() == 64)
1980 #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
1981 return this->do_define_as_constant
<64>(name
, version
, defined
, value
,
1982 symsize
, type
, binding
,
1983 visibility
, nonvis
, only_if_ref
,
1993 // Define a symbol as a constant, sized version.
1997 Symbol_table::do_define_as_constant(
1999 const char* version
,
2001 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
,
2002 typename
elfcpp::Elf_types
<size
>::Elf_WXword symsize
,
2004 elfcpp::STB binding
,
2005 elfcpp::STV visibility
,
2006 unsigned char nonvis
,
2008 bool force_override
)
2010 Sized_symbol
<size
>* sym
;
2011 Sized_symbol
<size
>* oldsym
;
2012 bool resolve_oldsym
;
2014 if (parameters
->target().is_big_endian())
2016 #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG)
2017 sym
= this->define_special_symbol
<size
, true>(&name
, &version
,
2018 only_if_ref
, &oldsym
,
2026 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE)
2027 sym
= this->define_special_symbol
<size
, false>(&name
, &version
,
2028 only_if_ref
, &oldsym
,
2038 sym
->init_constant(name
, version
, value
, symsize
, type
, binding
, visibility
,
2043 // Version symbols are absolute symbols with name == version.
2044 // We don't want to force them to be local.
2045 if ((version
== NULL
2048 && (binding
== elfcpp::STB_LOCAL
2049 || this->version_script_
.symbol_is_local(name
)))
2050 this->force_local(sym
);
2051 else if (version
!= NULL
2052 && (name
!= version
|| value
!= 0))
2053 sym
->set_is_default();
2058 || Symbol_table::should_override_with_special(oldsym
, defined
))
2059 this->override_with_special(oldsym
, sym
);
2070 // Define a set of symbols in output sections.
2073 Symbol_table::define_symbols(const Layout
* layout
, int count
,
2074 const Define_symbol_in_section
* p
,
2077 for (int i
= 0; i
< count
; ++i
, ++p
)
2079 Output_section
* os
= layout
->find_output_section(p
->output_section
);
2081 this->define_in_output_data(p
->name
, NULL
, PREDEFINED
, os
, p
->value
,
2082 p
->size
, p
->type
, p
->binding
,
2083 p
->visibility
, p
->nonvis
,
2084 p
->offset_is_from_end
,
2085 only_if_ref
|| p
->only_if_ref
);
2087 this->define_as_constant(p
->name
, NULL
, PREDEFINED
, 0, p
->size
,
2088 p
->type
, p
->binding
, p
->visibility
, p
->nonvis
,
2089 only_if_ref
|| p
->only_if_ref
,
2094 // Define a set of symbols in output segments.
2097 Symbol_table::define_symbols(const Layout
* layout
, int count
,
2098 const Define_symbol_in_segment
* p
,
2101 for (int i
= 0; i
< count
; ++i
, ++p
)
2103 Output_segment
* os
= layout
->find_output_segment(p
->segment_type
,
2104 p
->segment_flags_set
,
2105 p
->segment_flags_clear
);
2107 this->define_in_output_segment(p
->name
, NULL
, PREDEFINED
, os
, p
->value
,
2108 p
->size
, p
->type
, p
->binding
,
2109 p
->visibility
, p
->nonvis
,
2111 only_if_ref
|| p
->only_if_ref
);
2113 this->define_as_constant(p
->name
, NULL
, PREDEFINED
, 0, p
->size
,
2114 p
->type
, p
->binding
, p
->visibility
, p
->nonvis
,
2115 only_if_ref
|| p
->only_if_ref
,
2120 // Define CSYM using a COPY reloc. POSD is the Output_data where the
2121 // symbol should be defined--typically a .dyn.bss section. VALUE is
2122 // the offset within POSD.
2126 Symbol_table::define_with_copy_reloc(
2127 Sized_symbol
<size
>* csym
,
2129 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
)
2131 gold_assert(csym
->is_from_dynobj());
2132 gold_assert(!csym
->is_copied_from_dynobj());
2133 Object
* object
= csym
->object();
2134 gold_assert(object
->is_dynamic());
2135 Dynobj
* dynobj
= static_cast<Dynobj
*>(object
);
2137 // Our copied variable has to override any variable in a shared
2139 elfcpp::STB binding
= csym
->binding();
2140 if (binding
== elfcpp::STB_WEAK
)
2141 binding
= elfcpp::STB_GLOBAL
;
2143 this->define_in_output_data(csym
->name(), csym
->version(), COPY
,
2144 posd
, value
, csym
->symsize(),
2145 csym
->type(), binding
,
2146 csym
->visibility(), csym
->nonvis(),
2149 csym
->set_is_copied_from_dynobj();
2150 csym
->set_needs_dynsym_entry();
2152 this->copied_symbol_dynobjs_
[csym
] = dynobj
;
2154 // We have now defined all aliases, but we have not entered them all
2155 // in the copied_symbol_dynobjs_ map.
2156 if (csym
->has_alias())
2161 sym
= this->weak_aliases_
[sym
];
2164 gold_assert(sym
->output_data() == posd
);
2166 sym
->set_is_copied_from_dynobj();
2167 this->copied_symbol_dynobjs_
[sym
] = dynobj
;
2172 // SYM is defined using a COPY reloc. Return the dynamic object where
2173 // the original definition was found.
2176 Symbol_table::get_copy_source(const Symbol
* sym
) const
2178 gold_assert(sym
->is_copied_from_dynobj());
2179 Copied_symbol_dynobjs::const_iterator p
=
2180 this->copied_symbol_dynobjs_
.find(sym
);
2181 gold_assert(p
!= this->copied_symbol_dynobjs_
.end());
2185 // Add any undefined symbols named on the command line.
2188 Symbol_table::add_undefined_symbols_from_command_line(Layout
* layout
)
2190 if (parameters
->options().any_undefined()
2191 || layout
->script_options()->any_unreferenced())
2193 if (parameters
->target().get_size() == 32)
2195 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
2196 this->do_add_undefined_symbols_from_command_line
<32>(layout
);
2201 else if (parameters
->target().get_size() == 64)
2203 #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
2204 this->do_add_undefined_symbols_from_command_line
<64>(layout
);
2216 Symbol_table::do_add_undefined_symbols_from_command_line(Layout
* layout
)
2218 for (options::String_set::const_iterator p
=
2219 parameters
->options().undefined_begin();
2220 p
!= parameters
->options().undefined_end();
2222 this->add_undefined_symbol_from_command_line
<size
>(p
->c_str());
2224 for (Script_options::referenced_const_iterator p
=
2225 layout
->script_options()->referenced_begin();
2226 p
!= layout
->script_options()->referenced_end();
2228 this->add_undefined_symbol_from_command_line
<size
>(p
->c_str());
2233 Symbol_table::add_undefined_symbol_from_command_line(const char* name
)
2235 if (this->lookup(name
) != NULL
)
2238 const char* version
= NULL
;
2240 Sized_symbol
<size
>* sym
;
2241 Sized_symbol
<size
>* oldsym
;
2242 bool resolve_oldsym
;
2243 if (parameters
->target().is_big_endian())
2245 #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG)
2246 sym
= this->define_special_symbol
<size
, true>(&name
, &version
,
2255 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE)
2256 sym
= this->define_special_symbol
<size
, false>(&name
, &version
,
2264 gold_assert(oldsym
== NULL
);
2266 sym
->init_undefined(name
, version
, elfcpp::STT_NOTYPE
, elfcpp::STB_GLOBAL
,
2267 elfcpp::STV_DEFAULT
, 0);
2268 ++this->saw_undefined_
;
2271 // Set the dynamic symbol indexes. INDEX is the index of the first
2272 // global dynamic symbol. Pointers to the symbols are stored into the
2273 // vector SYMS. The names are added to DYNPOOL. This returns an
2274 // updated dynamic symbol index.
2277 Symbol_table::set_dynsym_indexes(unsigned int index
,
2278 std::vector
<Symbol
*>* syms
,
2279 Stringpool
* dynpool
,
2282 for (Symbol_table_type::iterator p
= this->table_
.begin();
2283 p
!= this->table_
.end();
2286 Symbol
* sym
= p
->second
;
2288 // Note that SYM may already have a dynamic symbol index, since
2289 // some symbols appear more than once in the symbol table, with
2290 // and without a version.
2292 if (!sym
->should_add_dynsym_entry(this))
2293 sym
->set_dynsym_index(-1U);
2294 else if (!sym
->has_dynsym_index())
2296 sym
->set_dynsym_index(index
);
2298 syms
->push_back(sym
);
2299 dynpool
->add(sym
->name(), false, NULL
);
2301 // Record any version information.
2302 if (sym
->version() != NULL
)
2303 versions
->record_version(this, dynpool
, sym
);
2305 // If the symbol is defined in a dynamic object and is
2306 // referenced in a regular object, then mark the dynamic
2307 // object as needed. This is used to implement --as-needed.
2308 if (sym
->is_from_dynobj() && sym
->in_reg())
2309 sym
->object()->set_is_needed();
2313 // Finish up the versions. In some cases this may add new dynamic
2315 index
= versions
->finalize(this, index
, syms
);
2320 // Set the final values for all the symbols. The index of the first
2321 // global symbol in the output file is *PLOCAL_SYMCOUNT. Record the
2322 // file offset OFF. Add their names to POOL. Return the new file
2323 // offset. Update *PLOCAL_SYMCOUNT if necessary.
2326 Symbol_table::finalize(off_t off
, off_t dynoff
, size_t dyn_global_index
,
2327 size_t dyncount
, Stringpool
* pool
,
2328 unsigned int* plocal_symcount
)
2332 gold_assert(*plocal_symcount
!= 0);
2333 this->first_global_index_
= *plocal_symcount
;
2335 this->dynamic_offset_
= dynoff
;
2336 this->first_dynamic_global_index_
= dyn_global_index
;
2337 this->dynamic_count_
= dyncount
;
2339 if (parameters
->target().get_size() == 32)
2341 #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_32_LITTLE)
2342 ret
= this->sized_finalize
<32>(off
, pool
, plocal_symcount
);
2347 else if (parameters
->target().get_size() == 64)
2349 #if defined(HAVE_TARGET_64_BIG) || defined(HAVE_TARGET_64_LITTLE)
2350 ret
= this->sized_finalize
<64>(off
, pool
, plocal_symcount
);
2358 // Now that we have the final symbol table, we can reliably note
2359 // which symbols should get warnings.
2360 this->warnings_
.note_warnings(this);
2365 // SYM is going into the symbol table at *PINDEX. Add the name to
2366 // POOL, update *PINDEX and *POFF.
2370 Symbol_table::add_to_final_symtab(Symbol
* sym
, Stringpool
* pool
,
2371 unsigned int* pindex
, off_t
* poff
)
2373 sym
->set_symtab_index(*pindex
);
2374 pool
->add(sym
->name(), false, NULL
);
2376 *poff
+= elfcpp::Elf_sizes
<size
>::sym_size
;
2379 // Set the final value for all the symbols. This is called after
2380 // Layout::finalize, so all the output sections have their final
2385 Symbol_table::sized_finalize(off_t off
, Stringpool
* pool
,
2386 unsigned int* plocal_symcount
)
2388 off
= align_address(off
, size
>> 3);
2389 this->offset_
= off
;
2391 unsigned int index
= *plocal_symcount
;
2392 const unsigned int orig_index
= index
;
2394 // First do all the symbols which have been forced to be local, as
2395 // they must appear before all global symbols.
2396 for (Forced_locals::iterator p
= this->forced_locals_
.begin();
2397 p
!= this->forced_locals_
.end();
2401 gold_assert(sym
->is_forced_local());
2402 if (this->sized_finalize_symbol
<size
>(sym
))
2404 this->add_to_final_symtab
<size
>(sym
, pool
, &index
, &off
);
2409 // Now do all the remaining symbols.
2410 for (Symbol_table_type::iterator p
= this->table_
.begin();
2411 p
!= this->table_
.end();
2414 Symbol
* sym
= p
->second
;
2415 if (this->sized_finalize_symbol
<size
>(sym
))
2416 this->add_to_final_symtab
<size
>(sym
, pool
, &index
, &off
);
2419 this->output_count_
= index
- orig_index
;
2424 // Compute the final value of SYM and store status in location PSTATUS.
2425 // During relaxation, this may be called multiple times for a symbol to
2426 // compute its would-be final value in each relaxation pass.
2429 typename Sized_symbol
<size
>::Value_type
2430 Symbol_table::compute_final_value(
2431 const Sized_symbol
<size
>* sym
,
2432 Compute_final_value_status
* pstatus
) const
2434 typedef typename Sized_symbol
<size
>::Value_type Value_type
;
2437 switch (sym
->source())
2439 case Symbol::FROM_OBJECT
:
2442 unsigned int shndx
= sym
->shndx(&is_ordinary
);
2445 && shndx
!= elfcpp::SHN_ABS
2446 && !Symbol::is_common_shndx(shndx
))
2448 *pstatus
= CFVS_UNSUPPORTED_SYMBOL_SECTION
;
2452 Object
* symobj
= sym
->object();
2453 if (symobj
->is_dynamic())
2456 shndx
= elfcpp::SHN_UNDEF
;
2458 else if (symobj
->pluginobj() != NULL
)
2461 shndx
= elfcpp::SHN_UNDEF
;
2463 else if (shndx
== elfcpp::SHN_UNDEF
)
2465 else if (!is_ordinary
2466 && (shndx
== elfcpp::SHN_ABS
2467 || Symbol::is_common_shndx(shndx
)))
2468 value
= sym
->value();
2471 Relobj
* relobj
= static_cast<Relobj
*>(symobj
);
2472 Output_section
* os
= relobj
->output_section(shndx
);
2474 if (this->is_section_folded(relobj
, shndx
))
2476 gold_assert(os
== NULL
);
2477 // Get the os of the section it is folded onto.
2478 Section_id folded
= this->icf_
->get_folded_section(relobj
,
2480 gold_assert(folded
.first
!= NULL
);
2481 Relobj
* folded_obj
= reinterpret_cast<Relobj
*>(folded
.first
);
2482 unsigned folded_shndx
= folded
.second
;
2484 os
= folded_obj
->output_section(folded_shndx
);
2485 gold_assert(os
!= NULL
);
2487 // Replace (relobj, shndx) with canonical ICF input section.
2488 shndx
= folded_shndx
;
2489 relobj
= folded_obj
;
2492 uint64_t secoff64
= relobj
->output_section_offset(shndx
);
2495 bool static_or_reloc
= (parameters
->doing_static_link() ||
2496 parameters
->options().relocatable());
2497 gold_assert(static_or_reloc
|| sym
->dynsym_index() == -1U);
2499 *pstatus
= CFVS_NO_OUTPUT_SECTION
;
2503 if (secoff64
== -1ULL)
2505 // The section needs special handling (e.g., a merge section).
2507 value
= os
->output_address(relobj
, shndx
, sym
->value());
2512 convert_types
<Value_type
, uint64_t>(secoff64
);
2513 if (sym
->type() == elfcpp::STT_TLS
)
2514 value
= sym
->value() + os
->tls_offset() + secoff
;
2516 value
= sym
->value() + os
->address() + secoff
;
2522 case Symbol::IN_OUTPUT_DATA
:
2524 Output_data
* od
= sym
->output_data();
2525 value
= sym
->value();
2526 if (sym
->type() != elfcpp::STT_TLS
)
2527 value
+= od
->address();
2530 Output_section
* os
= od
->output_section();
2531 gold_assert(os
!= NULL
);
2532 value
+= os
->tls_offset() + (od
->address() - os
->address());
2534 if (sym
->offset_is_from_end())
2535 value
+= od
->data_size();
2539 case Symbol::IN_OUTPUT_SEGMENT
:
2541 Output_segment
* os
= sym
->output_segment();
2542 value
= sym
->value();
2543 if (sym
->type() != elfcpp::STT_TLS
)
2544 value
+= os
->vaddr();
2545 switch (sym
->offset_base())
2547 case Symbol::SEGMENT_START
:
2549 case Symbol::SEGMENT_END
:
2550 value
+= os
->memsz();
2552 case Symbol::SEGMENT_BSS
:
2553 value
+= os
->filesz();
2561 case Symbol::IS_CONSTANT
:
2562 value
= sym
->value();
2565 case Symbol::IS_UNDEFINED
:
2577 // Finalize the symbol SYM. This returns true if the symbol should be
2578 // added to the symbol table, false otherwise.
2582 Symbol_table::sized_finalize_symbol(Symbol
* unsized_sym
)
2584 typedef typename Sized_symbol
<size
>::Value_type Value_type
;
2586 Sized_symbol
<size
>* sym
= static_cast<Sized_symbol
<size
>*>(unsized_sym
);
2588 // The default version of a symbol may appear twice in the symbol
2589 // table. We only need to finalize it once.
2590 if (sym
->has_symtab_index())
2595 gold_assert(!sym
->has_symtab_index());
2596 sym
->set_symtab_index(-1U);
2597 gold_assert(sym
->dynsym_index() == -1U);
2601 // If the symbol is only present on plugin files, the plugin decided we
2603 if (!sym
->in_real_elf())
2605 gold_assert(!sym
->has_symtab_index());
2606 sym
->set_symtab_index(-1U);
2610 // Compute final symbol value.
2611 Compute_final_value_status status
;
2612 Value_type value
= this->compute_final_value(sym
, &status
);
2618 case CFVS_UNSUPPORTED_SYMBOL_SECTION
:
2621 unsigned int shndx
= sym
->shndx(&is_ordinary
);
2622 gold_error(_("%s: unsupported symbol section 0x%x"),
2623 sym
->demangled_name().c_str(), shndx
);
2626 case CFVS_NO_OUTPUT_SECTION
:
2627 sym
->set_symtab_index(-1U);
2633 sym
->set_value(value
);
2635 if (parameters
->options().strip_all()
2636 || !parameters
->options().should_retain_symbol(sym
->name()))
2638 sym
->set_symtab_index(-1U);
2645 // Write out the global symbols.
2648 Symbol_table::write_globals(const Stringpool
* sympool
,
2649 const Stringpool
* dynpool
,
2650 Output_symtab_xindex
* symtab_xindex
,
2651 Output_symtab_xindex
* dynsym_xindex
,
2652 Output_file
* of
) const
2654 switch (parameters
->size_and_endianness())
2656 #ifdef HAVE_TARGET_32_LITTLE
2657 case Parameters::TARGET_32_LITTLE
:
2658 this->sized_write_globals
<32, false>(sympool
, dynpool
, symtab_xindex
,
2662 #ifdef HAVE_TARGET_32_BIG
2663 case Parameters::TARGET_32_BIG
:
2664 this->sized_write_globals
<32, true>(sympool
, dynpool
, symtab_xindex
,
2668 #ifdef HAVE_TARGET_64_LITTLE
2669 case Parameters::TARGET_64_LITTLE
:
2670 this->sized_write_globals
<64, false>(sympool
, dynpool
, symtab_xindex
,
2674 #ifdef HAVE_TARGET_64_BIG
2675 case Parameters::TARGET_64_BIG
:
2676 this->sized_write_globals
<64, true>(sympool
, dynpool
, symtab_xindex
,
2685 // Write out the global symbols.
2687 template<int size
, bool big_endian
>
2689 Symbol_table::sized_write_globals(const Stringpool
* sympool
,
2690 const Stringpool
* dynpool
,
2691 Output_symtab_xindex
* symtab_xindex
,
2692 Output_symtab_xindex
* dynsym_xindex
,
2693 Output_file
* of
) const
2695 const Target
& target
= parameters
->target();
2697 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
2699 const unsigned int output_count
= this->output_count_
;
2700 const section_size_type oview_size
= output_count
* sym_size
;
2701 const unsigned int first_global_index
= this->first_global_index_
;
2702 unsigned char* psyms
;
2703 if (this->offset_
== 0 || output_count
== 0)
2706 psyms
= of
->get_output_view(this->offset_
, oview_size
);
2708 const unsigned int dynamic_count
= this->dynamic_count_
;
2709 const section_size_type dynamic_size
= dynamic_count
* sym_size
;
2710 const unsigned int first_dynamic_global_index
=
2711 this->first_dynamic_global_index_
;
2712 unsigned char* dynamic_view
;
2713 if (this->dynamic_offset_
== 0 || dynamic_count
== 0)
2714 dynamic_view
= NULL
;
2716 dynamic_view
= of
->get_output_view(this->dynamic_offset_
, dynamic_size
);
2718 for (Symbol_table_type::const_iterator p
= this->table_
.begin();
2719 p
!= this->table_
.end();
2722 Sized_symbol
<size
>* sym
= static_cast<Sized_symbol
<size
>*>(p
->second
);
2724 // Possibly warn about unresolved symbols in shared libraries.
2725 this->warn_about_undefined_dynobj_symbol(sym
);
2727 unsigned int sym_index
= sym
->symtab_index();
2728 unsigned int dynsym_index
;
2729 if (dynamic_view
== NULL
)
2732 dynsym_index
= sym
->dynsym_index();
2734 if (sym_index
== -1U && dynsym_index
== -1U)
2736 // This symbol is not included in the output file.
2741 typename
elfcpp::Elf_types
<size
>::Elf_Addr sym_value
= sym
->value();
2742 typename
elfcpp::Elf_types
<size
>::Elf_Addr dynsym_value
= sym_value
;
2743 elfcpp::STB binding
= sym
->binding();
2744 switch (sym
->source())
2746 case Symbol::FROM_OBJECT
:
2749 unsigned int in_shndx
= sym
->shndx(&is_ordinary
);
2752 && in_shndx
!= elfcpp::SHN_ABS
2753 && !Symbol::is_common_shndx(in_shndx
))
2755 gold_error(_("%s: unsupported symbol section 0x%x"),
2756 sym
->demangled_name().c_str(), in_shndx
);
2761 Object
* symobj
= sym
->object();
2762 if (symobj
->is_dynamic())
2764 if (sym
->needs_dynsym_value())
2765 dynsym_value
= target
.dynsym_value(sym
);
2766 shndx
= elfcpp::SHN_UNDEF
;
2767 if (sym
->is_undef_binding_weak())
2768 binding
= elfcpp::STB_WEAK
;
2770 binding
= elfcpp::STB_GLOBAL
;
2772 else if (symobj
->pluginobj() != NULL
)
2773 shndx
= elfcpp::SHN_UNDEF
;
2774 else if (in_shndx
== elfcpp::SHN_UNDEF
2776 && (in_shndx
== elfcpp::SHN_ABS
2777 || Symbol::is_common_shndx(in_shndx
))))
2781 Relobj
* relobj
= static_cast<Relobj
*>(symobj
);
2782 Output_section
* os
= relobj
->output_section(in_shndx
);
2783 if (this->is_section_folded(relobj
, in_shndx
))
2785 // This global symbol must be written out even though
2787 // Get the os of the section it is folded onto.
2789 this->icf_
->get_folded_section(relobj
, in_shndx
);
2790 gold_assert(folded
.first
!=NULL
);
2791 Relobj
* folded_obj
=
2792 reinterpret_cast<Relobj
*>(folded
.first
);
2793 os
= folded_obj
->output_section(folded
.second
);
2794 gold_assert(os
!= NULL
);
2796 gold_assert(os
!= NULL
);
2797 shndx
= os
->out_shndx();
2799 if (shndx
>= elfcpp::SHN_LORESERVE
)
2801 if (sym_index
!= -1U)
2802 symtab_xindex
->add(sym_index
, shndx
);
2803 if (dynsym_index
!= -1U)
2804 dynsym_xindex
->add(dynsym_index
, shndx
);
2805 shndx
= elfcpp::SHN_XINDEX
;
2808 // In object files symbol values are section
2810 if (parameters
->options().relocatable())
2811 sym_value
-= os
->address();
2817 case Symbol::IN_OUTPUT_DATA
:
2818 shndx
= sym
->output_data()->out_shndx();
2819 if (shndx
>= elfcpp::SHN_LORESERVE
)
2821 if (sym_index
!= -1U)
2822 symtab_xindex
->add(sym_index
, shndx
);
2823 if (dynsym_index
!= -1U)
2824 dynsym_xindex
->add(dynsym_index
, shndx
);
2825 shndx
= elfcpp::SHN_XINDEX
;
2829 case Symbol::IN_OUTPUT_SEGMENT
:
2830 shndx
= elfcpp::SHN_ABS
;
2833 case Symbol::IS_CONSTANT
:
2834 shndx
= elfcpp::SHN_ABS
;
2837 case Symbol::IS_UNDEFINED
:
2838 shndx
= elfcpp::SHN_UNDEF
;
2845 if (sym_index
!= -1U)
2847 sym_index
-= first_global_index
;
2848 gold_assert(sym_index
< output_count
);
2849 unsigned char* ps
= psyms
+ (sym_index
* sym_size
);
2850 this->sized_write_symbol
<size
, big_endian
>(sym
, sym_value
, shndx
,
2851 binding
, sympool
, ps
);
2854 if (dynsym_index
!= -1U)
2856 dynsym_index
-= first_dynamic_global_index
;
2857 gold_assert(dynsym_index
< dynamic_count
);
2858 unsigned char* pd
= dynamic_view
+ (dynsym_index
* sym_size
);
2859 this->sized_write_symbol
<size
, big_endian
>(sym
, dynsym_value
, shndx
,
2860 binding
, dynpool
, pd
);
2864 of
->write_output_view(this->offset_
, oview_size
, psyms
);
2865 if (dynamic_view
!= NULL
)
2866 of
->write_output_view(this->dynamic_offset_
, dynamic_size
, dynamic_view
);
2869 // Write out the symbol SYM, in section SHNDX, to P. POOL is the
2870 // strtab holding the name.
2872 template<int size
, bool big_endian
>
2874 Symbol_table::sized_write_symbol(
2875 Sized_symbol
<size
>* sym
,
2876 typename
elfcpp::Elf_types
<size
>::Elf_Addr value
,
2878 elfcpp::STB binding
,
2879 const Stringpool
* pool
,
2880 unsigned char* p
) const
2882 elfcpp::Sym_write
<size
, big_endian
> osym(p
);
2883 osym
.put_st_name(pool
->get_offset(sym
->name()));
2884 osym
.put_st_value(value
);
2885 // Use a symbol size of zero for undefined symbols from shared libraries.
2886 if (shndx
== elfcpp::SHN_UNDEF
&& sym
->is_from_dynobj())
2887 osym
.put_st_size(0);
2889 osym
.put_st_size(sym
->symsize());
2890 elfcpp::STT type
= sym
->type();
2891 // Turn IFUNC symbols from shared libraries into normal FUNC symbols.
2892 if (type
== elfcpp::STT_GNU_IFUNC
2893 && sym
->is_from_dynobj())
2894 type
= elfcpp::STT_FUNC
;
2895 // A version script may have overridden the default binding.
2896 if (sym
->is_forced_local())
2897 osym
.put_st_info(elfcpp::elf_st_info(elfcpp::STB_LOCAL
, type
));
2899 osym
.put_st_info(elfcpp::elf_st_info(binding
, type
));
2900 osym
.put_st_other(elfcpp::elf_st_other(sym
->visibility(), sym
->nonvis()));
2901 osym
.put_st_shndx(shndx
);
2904 // Check for unresolved symbols in shared libraries. This is
2905 // controlled by the --allow-shlib-undefined option.
2907 // We only warn about libraries for which we have seen all the
2908 // DT_NEEDED entries. We don't try to track down DT_NEEDED entries
2909 // which were not seen in this link. If we didn't see a DT_NEEDED
2910 // entry, we aren't going to be able to reliably report whether the
2911 // symbol is undefined.
2913 // We also don't warn about libraries found in a system library
2914 // directory (e.g., /lib or /usr/lib); we assume that those libraries
2915 // are OK. This heuristic avoids problems on GNU/Linux, in which -ldl
2916 // can have undefined references satisfied by ld-linux.so.
2919 Symbol_table::warn_about_undefined_dynobj_symbol(Symbol
* sym
) const
2922 if (sym
->source() == Symbol::FROM_OBJECT
2923 && sym
->object()->is_dynamic()
2924 && sym
->shndx(&dummy
) == elfcpp::SHN_UNDEF
2925 && sym
->binding() != elfcpp::STB_WEAK
2926 && !parameters
->options().allow_shlib_undefined()
2927 && !parameters
->target().is_defined_by_abi(sym
)
2928 && !sym
->object()->is_in_system_directory())
2930 // A very ugly cast.
2931 Dynobj
* dynobj
= static_cast<Dynobj
*>(sym
->object());
2932 if (!dynobj
->has_unknown_needed_entries())
2933 gold_undefined_symbol(sym
);
2937 // Write out a section symbol. Return the update offset.
2940 Symbol_table::write_section_symbol(const Output_section
* os
,
2941 Output_symtab_xindex
* symtab_xindex
,
2945 switch (parameters
->size_and_endianness())
2947 #ifdef HAVE_TARGET_32_LITTLE
2948 case Parameters::TARGET_32_LITTLE
:
2949 this->sized_write_section_symbol
<32, false>(os
, symtab_xindex
, of
,
2953 #ifdef HAVE_TARGET_32_BIG
2954 case Parameters::TARGET_32_BIG
:
2955 this->sized_write_section_symbol
<32, true>(os
, symtab_xindex
, of
,
2959 #ifdef HAVE_TARGET_64_LITTLE
2960 case Parameters::TARGET_64_LITTLE
:
2961 this->sized_write_section_symbol
<64, false>(os
, symtab_xindex
, of
,
2965 #ifdef HAVE_TARGET_64_BIG
2966 case Parameters::TARGET_64_BIG
:
2967 this->sized_write_section_symbol
<64, true>(os
, symtab_xindex
, of
,
2976 // Write out a section symbol, specialized for size and endianness.
2978 template<int size
, bool big_endian
>
2980 Symbol_table::sized_write_section_symbol(const Output_section
* os
,
2981 Output_symtab_xindex
* symtab_xindex
,
2985 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
2987 unsigned char* pov
= of
->get_output_view(offset
, sym_size
);
2989 elfcpp::Sym_write
<size
, big_endian
> osym(pov
);
2990 osym
.put_st_name(0);
2991 if (parameters
->options().relocatable())
2992 osym
.put_st_value(0);
2994 osym
.put_st_value(os
->address());
2995 osym
.put_st_size(0);
2996 osym
.put_st_info(elfcpp::elf_st_info(elfcpp::STB_LOCAL
,
2997 elfcpp::STT_SECTION
));
2998 osym
.put_st_other(elfcpp::elf_st_other(elfcpp::STV_DEFAULT
, 0));
3000 unsigned int shndx
= os
->out_shndx();
3001 if (shndx
>= elfcpp::SHN_LORESERVE
)
3003 symtab_xindex
->add(os
->symtab_index(), shndx
);
3004 shndx
= elfcpp::SHN_XINDEX
;
3006 osym
.put_st_shndx(shndx
);
3008 of
->write_output_view(offset
, sym_size
, pov
);
3011 // Print statistical information to stderr. This is used for --stats.
3014 Symbol_table::print_stats() const
3016 #if defined(HAVE_TR1_UNORDERED_MAP) || defined(HAVE_EXT_HASH_MAP)
3017 fprintf(stderr
, _("%s: symbol table entries: %zu; buckets: %zu\n"),
3018 program_name
, this->table_
.size(), this->table_
.bucket_count());
3020 fprintf(stderr
, _("%s: symbol table entries: %zu\n"),
3021 program_name
, this->table_
.size());
3023 this->namepool_
.print_stats("symbol table stringpool");
3026 // We check for ODR violations by looking for symbols with the same
3027 // name for which the debugging information reports that they were
3028 // defined in disjoint source locations. When comparing the source
3029 // location, we consider instances with the same base filename to be
3030 // the same. This is because different object files/shared libraries
3031 // can include the same header file using different paths, and
3032 // different optimization settings can make the line number appear to
3033 // be a couple lines off, and we don't want to report an ODR violation
3036 // This struct is used to compare line information, as returned by
3037 // Dwarf_line_info::one_addr2line. It implements a < comparison
3038 // operator used with std::sort.
3040 struct Odr_violation_compare
3043 operator()(const std::string
& s1
, const std::string
& s2
) const
3045 // Inputs should be of the form "dirname/filename:linenum" where
3046 // "dirname/" is optional. We want to compare just the filename:linenum.
3048 // Find the last '/' in each string.
3049 std::string::size_type s1begin
= s1
.rfind('/');
3050 std::string::size_type s2begin
= s2
.rfind('/');
3051 // If there was no '/' in a string, start at the beginning.
3052 if (s1begin
== std::string::npos
)
3054 if (s2begin
== std::string::npos
)
3056 return s1
.compare(s1begin
, std::string::npos
,
3057 s2
, s2begin
, std::string::npos
) < 0;
3061 // Returns all of the lines attached to LOC, not just the one the
3062 // instruction actually came from.
3063 std::vector
<std::string
>
3064 Symbol_table::linenos_from_loc(const Task
* task
,
3065 const Symbol_location
& loc
)
3067 // We need to lock the object in order to read it. This
3068 // means that we have to run in a singleton Task. If we
3069 // want to run this in a general Task for better
3070 // performance, we will need one Task for object, plus
3071 // appropriate locking to ensure that we don't conflict with
3072 // other uses of the object. Also note, one_addr2line is not
3073 // currently thread-safe.
3074 Task_lock_obj
<Object
> tl(task
, loc
.object
);
3076 std::vector
<std::string
> result
;
3077 // 16 is the size of the object-cache that one_addr2line should use.
3078 std::string canonical_result
= Dwarf_line_info::one_addr2line(
3079 loc
.object
, loc
.shndx
, loc
.offset
, 16, &result
);
3080 if (!canonical_result
.empty())
3081 result
.push_back(canonical_result
);
3085 // OutputIterator that records if it was ever assigned to. This
3086 // allows it to be used with std::set_intersection() to check for
3087 // intersection rather than computing the intersection.
3088 struct Check_intersection
3090 Check_intersection()
3094 bool had_intersection() const
3095 { return this->value_
; }
3097 Check_intersection
& operator++()
3100 Check_intersection
& operator*()
3103 template<typename T
>
3104 Check_intersection
& operator=(const T
&)
3106 this->value_
= true;
3114 // Check candidate_odr_violations_ to find symbols with the same name
3115 // but apparently different definitions (different source-file/line-no
3116 // for each line assigned to the first instruction).
3119 Symbol_table::detect_odr_violations(const Task
* task
,
3120 const char* output_file_name
) const
3122 for (Odr_map::const_iterator it
= candidate_odr_violations_
.begin();
3123 it
!= candidate_odr_violations_
.end();
3126 const char* const symbol_name
= it
->first
;
3128 std::string first_object_name
;
3129 std::vector
<std::string
> first_object_linenos
;
3131 Unordered_set
<Symbol_location
, Symbol_location_hash
>::const_iterator
3132 locs
= it
->second
.begin();
3133 const Unordered_set
<Symbol_location
, Symbol_location_hash
>::const_iterator
3134 locs_end
= it
->second
.end();
3135 for (; locs
!= locs_end
&& first_object_linenos
.empty(); ++locs
)
3137 // Save the line numbers from the first definition to
3138 // compare to the other definitions. Ideally, we'd compare
3139 // every definition to every other, but we don't want to
3140 // take O(N^2) time to do this. This shortcut may cause
3141 // false negatives that appear or disappear depending on the
3142 // link order, but it won't cause false positives.
3143 first_object_name
= locs
->object
->name();
3144 first_object_linenos
= this->linenos_from_loc(task
, *locs
);
3147 // Sort by Odr_violation_compare to make std::set_intersection work.
3148 std::sort(first_object_linenos
.begin(), first_object_linenos
.end(),
3149 Odr_violation_compare());
3151 for (; locs
!= locs_end
; ++locs
)
3153 std::vector
<std::string
> linenos
=
3154 this->linenos_from_loc(task
, *locs
);
3155 // linenos will be empty if we couldn't parse the debug info.
3156 if (linenos
.empty())
3158 // Sort by Odr_violation_compare to make std::set_intersection work.
3159 std::sort(linenos
.begin(), linenos
.end(), Odr_violation_compare());
3161 Check_intersection intersection_result
=
3162 std::set_intersection(first_object_linenos
.begin(),
3163 first_object_linenos
.end(),
3166 Check_intersection(),
3167 Odr_violation_compare());
3168 if (!intersection_result
.had_intersection())
3170 gold_warning(_("while linking %s: symbol '%s' defined in "
3171 "multiple places (possible ODR violation):"),
3172 output_file_name
, demangle(symbol_name
).c_str());
3173 // This only prints one location from each definition,
3174 // which may not be the location we expect to intersect
3175 // with another definition. We could print the whole
3176 // set of locations, but that seems too verbose.
3177 gold_assert(!first_object_linenos
.empty());
3178 gold_assert(!linenos
.empty());
3179 fprintf(stderr
, _(" %s from %s\n"),
3180 first_object_linenos
[0].c_str(),
3181 first_object_name
.c_str());
3182 fprintf(stderr
, _(" %s from %s\n"),
3184 locs
->object
->name().c_str());
3185 // Only print one broken pair, to avoid needing to
3186 // compare against a list of the disjoint definition
3187 // locations we've found so far. (If we kept comparing
3188 // against just the first one, we'd get a lot of
3189 // redundant complaints about the second definition
3195 // We only call one_addr2line() in this function, so we can clear its cache.
3196 Dwarf_line_info::clear_addr2line_cache();
3199 // Warnings functions.
3201 // Add a new warning.
3204 Warnings::add_warning(Symbol_table
* symtab
, const char* name
, Object
* obj
,
3205 const std::string
& warning
)
3207 name
= symtab
->canonicalize_name(name
);
3208 this->warnings_
[name
].set(obj
, warning
);
3211 // Look through the warnings and mark the symbols for which we should
3212 // warn. This is called during Layout::finalize when we know the
3213 // sources for all the symbols.
3216 Warnings::note_warnings(Symbol_table
* symtab
)
3218 for (Warning_table::iterator p
= this->warnings_
.begin();
3219 p
!= this->warnings_
.end();
3222 Symbol
* sym
= symtab
->lookup(p
->first
, NULL
);
3224 && sym
->source() == Symbol::FROM_OBJECT
3225 && sym
->object() == p
->second
.object
)
3226 sym
->set_has_warning();
3230 // Issue a warning. This is called when we see a relocation against a
3231 // symbol for which has a warning.
3233 template<int size
, bool big_endian
>
3235 Warnings::issue_warning(const Symbol
* sym
,
3236 const Relocate_info
<size
, big_endian
>* relinfo
,
3237 size_t relnum
, off_t reloffset
) const
3239 gold_assert(sym
->has_warning());
3240 Warning_table::const_iterator p
= this->warnings_
.find(sym
->name());
3241 gold_assert(p
!= this->warnings_
.end());
3242 gold_warning_at_location(relinfo
, relnum
, reloffset
,
3243 "%s", p
->second
.text
.c_str());
3246 // Instantiate the templates we need. We could use the configure
3247 // script to restrict this to only the ones needed for implemented
3250 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
3253 Sized_symbol
<32>::allocate_common(Output_data
*, Value_type
);
3256 #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
3259 Sized_symbol
<64>::allocate_common(Output_data
*, Value_type
);
3262 #ifdef HAVE_TARGET_32_LITTLE
3265 Symbol_table::add_from_relobj
<32, false>(
3266 Sized_relobj
<32, false>* relobj
,
3267 const unsigned char* syms
,
3269 size_t symndx_offset
,
3270 const char* sym_names
,
3271 size_t sym_name_size
,
3272 Sized_relobj
<32, false>::Symbols
* sympointers
,
3276 #ifdef HAVE_TARGET_32_BIG
3279 Symbol_table::add_from_relobj
<32, true>(
3280 Sized_relobj
<32, true>* relobj
,
3281 const unsigned char* syms
,
3283 size_t symndx_offset
,
3284 const char* sym_names
,
3285 size_t sym_name_size
,
3286 Sized_relobj
<32, true>::Symbols
* sympointers
,
3290 #ifdef HAVE_TARGET_64_LITTLE
3293 Symbol_table::add_from_relobj
<64, false>(
3294 Sized_relobj
<64, false>* relobj
,
3295 const unsigned char* syms
,
3297 size_t symndx_offset
,
3298 const char* sym_names
,
3299 size_t sym_name_size
,
3300 Sized_relobj
<64, false>::Symbols
* sympointers
,
3304 #ifdef HAVE_TARGET_64_BIG
3307 Symbol_table::add_from_relobj
<64, true>(
3308 Sized_relobj
<64, true>* relobj
,
3309 const unsigned char* syms
,
3311 size_t symndx_offset
,
3312 const char* sym_names
,
3313 size_t sym_name_size
,
3314 Sized_relobj
<64, true>::Symbols
* sympointers
,
3318 #ifdef HAVE_TARGET_32_LITTLE
3321 Symbol_table::add_from_pluginobj
<32, false>(
3322 Sized_pluginobj
<32, false>* obj
,
3325 elfcpp::Sym
<32, false>* sym
);
3328 #ifdef HAVE_TARGET_32_BIG
3331 Symbol_table::add_from_pluginobj
<32, true>(
3332 Sized_pluginobj
<32, true>* obj
,
3335 elfcpp::Sym
<32, true>* sym
);
3338 #ifdef HAVE_TARGET_64_LITTLE
3341 Symbol_table::add_from_pluginobj
<64, false>(
3342 Sized_pluginobj
<64, false>* obj
,
3345 elfcpp::Sym
<64, false>* sym
);
3348 #ifdef HAVE_TARGET_64_BIG
3351 Symbol_table::add_from_pluginobj
<64, true>(
3352 Sized_pluginobj
<64, true>* obj
,
3355 elfcpp::Sym
<64, true>* sym
);
3358 #ifdef HAVE_TARGET_32_LITTLE
3361 Symbol_table::add_from_dynobj
<32, false>(
3362 Sized_dynobj
<32, false>* dynobj
,
3363 const unsigned char* syms
,
3365 const char* sym_names
,
3366 size_t sym_name_size
,
3367 const unsigned char* versym
,
3369 const std::vector
<const char*>* version_map
,
3370 Sized_relobj
<32, false>::Symbols
* sympointers
,
3374 #ifdef HAVE_TARGET_32_BIG
3377 Symbol_table::add_from_dynobj
<32, true>(
3378 Sized_dynobj
<32, true>* dynobj
,
3379 const unsigned char* syms
,
3381 const char* sym_names
,
3382 size_t sym_name_size
,
3383 const unsigned char* versym
,
3385 const std::vector
<const char*>* version_map
,
3386 Sized_relobj
<32, true>::Symbols
* sympointers
,
3390 #ifdef HAVE_TARGET_64_LITTLE
3393 Symbol_table::add_from_dynobj
<64, false>(
3394 Sized_dynobj
<64, false>* dynobj
,
3395 const unsigned char* syms
,
3397 const char* sym_names
,
3398 size_t sym_name_size
,
3399 const unsigned char* versym
,
3401 const std::vector
<const char*>* version_map
,
3402 Sized_relobj
<64, false>::Symbols
* sympointers
,
3406 #ifdef HAVE_TARGET_64_BIG
3409 Symbol_table::add_from_dynobj
<64, true>(
3410 Sized_dynobj
<64, true>* dynobj
,
3411 const unsigned char* syms
,
3413 const char* sym_names
,
3414 size_t sym_name_size
,
3415 const unsigned char* versym
,
3417 const std::vector
<const char*>* version_map
,
3418 Sized_relobj
<64, true>::Symbols
* sympointers
,
3422 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
3425 Symbol_table::define_with_copy_reloc
<32>(
3426 Sized_symbol
<32>* sym
,
3428 elfcpp::Elf_types
<32>::Elf_Addr value
);
3431 #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
3434 Symbol_table::define_with_copy_reloc
<64>(
3435 Sized_symbol
<64>* sym
,
3437 elfcpp::Elf_types
<64>::Elf_Addr value
);
3440 #ifdef HAVE_TARGET_32_LITTLE
3443 Warnings::issue_warning
<32, false>(const Symbol
* sym
,
3444 const Relocate_info
<32, false>* relinfo
,
3445 size_t relnum
, off_t reloffset
) const;
3448 #ifdef HAVE_TARGET_32_BIG
3451 Warnings::issue_warning
<32, true>(const Symbol
* sym
,
3452 const Relocate_info
<32, true>* relinfo
,
3453 size_t relnum
, off_t reloffset
) const;
3456 #ifdef HAVE_TARGET_64_LITTLE
3459 Warnings::issue_warning
<64, false>(const Symbol
* sym
,
3460 const Relocate_info
<64, false>* relinfo
,
3461 size_t relnum
, off_t reloffset
) const;
3464 #ifdef HAVE_TARGET_64_BIG
3467 Warnings::issue_warning
<64, true>(const Symbol
* sym
,
3468 const Relocate_info
<64, true>* relinfo
,
3469 size_t relnum
, off_t reloffset
) const;
3472 } // End namespace gold.