1 // symtab.cc -- the gold symbol table
3 // Copyright (C) 2006-2014 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"
43 #include "incremental.h"
50 // Initialize fields in Symbol. This initializes everything except u_
54 Symbol::init_fields(const char* name, const char* version,
55 elfcpp::STT type, elfcpp::STB binding,
56 elfcpp::STV visibility, unsigned char nonvis)
59 this->version_ = version;
60 this->symtab_index_ = 0;
61 this->dynsym_index_ = 0;
62 this->got_offsets_.init();
63 this->plt_offset_ = -1U;
65 this->binding_ = binding;
66 this->visibility_ = visibility;
67 this->nonvis_ = nonvis;
68 this->is_def_ = false;
69 this->is_forwarder_ = false;
70 this->has_alias_ = false;
71 this->needs_dynsym_entry_ = false;
72 this->in_reg_ = false;
73 this->in_dyn_ = false;
74 this->has_warning_ = false;
75 this->is_copied_from_dynobj_ = false;
76 this->is_forced_local_ = false;
77 this->is_ordinary_shndx_ = false;
78 this->in_real_elf_ = false;
79 this->is_defined_in_discarded_section_ = false;
80 this->undef_binding_set_ = false;
81 this->undef_binding_weak_ = false;
82 this->is_predefined_ = false;
85 // Return the demangled version of the symbol's name, but only
86 // if the --demangle flag was set.
89 demangle(const char* name)
91 if (!parameters->options().do_demangle())
94 // cplus_demangle allocates memory for the result it returns,
95 // and returns NULL if the name is already demangled.
96 char* demangled_name = cplus_demangle(name, DMGL_ANSI | DMGL_PARAMS);
97 if (demangled_name == NULL)
100 std::string retval(demangled_name);
101 free(demangled_name);
106 Symbol::demangled_name() const
108 return demangle(this->name());
111 // Initialize the fields in the base class Symbol for SYM in OBJECT.
113 template<int size, bool big_endian>
115 Symbol::init_base_object(const char* name, const char* version, Object* object,
116 const elfcpp::Sym<size, big_endian>& sym,
117 unsigned int st_shndx, bool is_ordinary)
119 this->init_fields(name, version, sym.get_st_type(), sym.get_st_bind(),
120 sym.get_st_visibility(), sym.get_st_nonvis());
121 this->u_.from_object.object = object;
122 this->u_.from_object.shndx = st_shndx;
123 this->is_ordinary_shndx_ = is_ordinary;
124 this->source_ = FROM_OBJECT;
125 this->in_reg_ = !object->is_dynamic();
126 this->in_dyn_ = object->is_dynamic();
127 this->in_real_elf_ = object->pluginobj() == NULL;
130 // Initialize the fields in the base class Symbol for a symbol defined
131 // in an Output_data.
134 Symbol::init_base_output_data(const char* name, const char* version,
135 Output_data* od, elfcpp::STT type,
136 elfcpp::STB binding, elfcpp::STV visibility,
137 unsigned char nonvis, bool offset_is_from_end,
140 this->init_fields(name, version, type, binding, visibility, nonvis);
141 this->u_.in_output_data.output_data = od;
142 this->u_.in_output_data.offset_is_from_end = offset_is_from_end;
143 this->source_ = IN_OUTPUT_DATA;
144 this->in_reg_ = true;
145 this->in_real_elf_ = true;
146 this->is_predefined_ = is_predefined;
149 // Initialize the fields in the base class Symbol for a symbol defined
150 // in an Output_segment.
153 Symbol::init_base_output_segment(const char* name, const char* version,
154 Output_segment* os, elfcpp::STT type,
155 elfcpp::STB binding, elfcpp::STV visibility,
156 unsigned char nonvis,
157 Segment_offset_base offset_base,
160 this->init_fields(name, version, type, binding, visibility, nonvis);
161 this->u_.in_output_segment.output_segment = os;
162 this->u_.in_output_segment.offset_base = offset_base;
163 this->source_ = IN_OUTPUT_SEGMENT;
164 this->in_reg_ = true;
165 this->in_real_elf_ = true;
166 this->is_predefined_ = is_predefined;
169 // Initialize the fields in the base class Symbol for a symbol defined
173 Symbol::init_base_constant(const char* name, const char* version,
174 elfcpp::STT type, elfcpp::STB binding,
175 elfcpp::STV visibility, unsigned char nonvis,
178 this->init_fields(name, version, type, binding, visibility, nonvis);
179 this->source_ = IS_CONSTANT;
180 this->in_reg_ = true;
181 this->in_real_elf_ = true;
182 this->is_predefined_ = is_predefined;
185 // Initialize the fields in the base class Symbol for an undefined
189 Symbol::init_base_undefined(const char* name, const char* version,
190 elfcpp::STT type, elfcpp::STB binding,
191 elfcpp::STV visibility, unsigned char nonvis)
193 this->init_fields(name, version, type, binding, visibility, nonvis);
194 this->dynsym_index_ = -1U;
195 this->source_ = IS_UNDEFINED;
196 this->in_reg_ = true;
197 this->in_real_elf_ = true;
200 // Allocate a common symbol in the base.
203 Symbol::allocate_base_common(Output_data* od)
205 gold_assert(this->is_common());
206 this->source_ = IN_OUTPUT_DATA;
207 this->u_.in_output_data.output_data = od;
208 this->u_.in_output_data.offset_is_from_end = false;
211 // Initialize the fields in Sized_symbol for SYM in OBJECT.
214 template<bool big_endian>
216 Sized_symbol<size>::init_object(const char* name, const char* version,
218 const elfcpp::Sym<size, big_endian>& sym,
219 unsigned int st_shndx, bool is_ordinary)
221 this->init_base_object(name, version, object, sym, st_shndx, is_ordinary);
222 this->value_ = sym.get_st_value();
223 this->symsize_ = sym.get_st_size();
226 // Initialize the fields in Sized_symbol for a symbol defined in an
231 Sized_symbol<size>::init_output_data(const char* name, const char* version,
232 Output_data* od, Value_type value,
233 Size_type symsize, elfcpp::STT type,
235 elfcpp::STV visibility,
236 unsigned char nonvis,
237 bool offset_is_from_end,
240 this->init_base_output_data(name, version, od, type, binding, visibility,
241 nonvis, offset_is_from_end, is_predefined);
242 this->value_ = value;
243 this->symsize_ = symsize;
246 // Initialize the fields in Sized_symbol for a symbol defined in an
251 Sized_symbol<size>::init_output_segment(const char* name, const char* version,
252 Output_segment* os, Value_type value,
253 Size_type symsize, elfcpp::STT type,
255 elfcpp::STV visibility,
256 unsigned char nonvis,
257 Segment_offset_base offset_base,
260 this->init_base_output_segment(name, version, os, type, binding, visibility,
261 nonvis, offset_base, is_predefined);
262 this->value_ = value;
263 this->symsize_ = symsize;
266 // Initialize the fields in Sized_symbol for a symbol defined as a
271 Sized_symbol<size>::init_constant(const char* name, const char* version,
272 Value_type value, Size_type symsize,
273 elfcpp::STT type, elfcpp::STB binding,
274 elfcpp::STV visibility, unsigned char nonvis,
277 this->init_base_constant(name, version, type, binding, visibility, nonvis,
279 this->value_ = value;
280 this->symsize_ = symsize;
283 // Initialize the fields in Sized_symbol for an undefined symbol.
287 Sized_symbol<size>::init_undefined(const char* name, const char* version,
288 elfcpp::STT type, elfcpp::STB binding,
289 elfcpp::STV visibility, unsigned char nonvis)
291 this->init_base_undefined(name, version, type, binding, visibility, nonvis);
296 // Return an allocated string holding the symbol's name as
297 // name@version. This is used for relocatable links.
300 Symbol::versioned_name() const
302 gold_assert(this->version_ != NULL);
303 std::string ret = this->name_;
307 ret += this->version_;
311 // Return true if SHNDX represents a common symbol.
314 Symbol::is_common_shndx(unsigned int shndx)
316 return (shndx == elfcpp::SHN_COMMON
317 || shndx == parameters->target().small_common_shndx()
318 || shndx == parameters->target().large_common_shndx());
321 // Allocate a common symbol.
325 Sized_symbol<size>::allocate_common(Output_data* od, Value_type value)
327 this->allocate_base_common(od);
328 this->value_ = value;
331 // The ""'s around str ensure str is a string literal, so sizeof works.
332 #define strprefix(var, str) (strncmp(var, str, sizeof("" str "") - 1) == 0)
334 // Return true if this symbol should be added to the dynamic symbol
338 Symbol::should_add_dynsym_entry(Symbol_table* symtab) const
340 // If the symbol is only present on plugin files, the plugin decided we
342 if (!this->in_real_elf())
345 // If the symbol is used by a dynamic relocation, we need to add it.
346 if (this->needs_dynsym_entry())
349 // If this symbol's section is not added, the symbol need not be added.
350 // The section may have been GCed. Note that export_dynamic is being
351 // overridden here. This should not be done for shared objects.
352 if (parameters->options().gc_sections()
353 && !parameters->options().shared()
354 && this->source() == Symbol::FROM_OBJECT
355 && !this->object()->is_dynamic())
357 Relobj* relobj = static_cast<Relobj*>(this->object());
359 unsigned int shndx = this->shndx(&is_ordinary);
360 if (is_ordinary && shndx != elfcpp::SHN_UNDEF
361 && !relobj->is_section_included(shndx)
362 && !symtab->is_section_folded(relobj, shndx))
366 // If the symbol was forced dynamic in a --dynamic-list file
367 // or an --export-dynamic-symbol option, add it.
368 if (!this->is_from_dynobj()
369 && (parameters->options().in_dynamic_list(this->name())
370 || parameters->options().is_export_dynamic_symbol(this->name())))
372 if (!this->is_forced_local())
374 gold_warning(_("Cannot export local symbol '%s'"),
375 this->demangled_name().c_str());
379 // If the symbol was forced local in a version script, do not add it.
380 if (this->is_forced_local())
383 // If dynamic-list-data was specified, add any STT_OBJECT.
384 if (parameters->options().dynamic_list_data()
385 && !this->is_from_dynobj()
386 && this->type() == elfcpp::STT_OBJECT)
389 // If --dynamic-list-cpp-new was specified, add any new/delete symbol.
390 // If --dynamic-list-cpp-typeinfo was specified, add any typeinfo symbols.
391 if ((parameters->options().dynamic_list_cpp_new()
392 || parameters->options().dynamic_list_cpp_typeinfo())
393 && !this->is_from_dynobj())
395 // TODO(csilvers): We could probably figure out if we're an operator
396 // new/delete or typeinfo without the need to demangle.
397 char* demangled_name = cplus_demangle(this->name(),
398 DMGL_ANSI | DMGL_PARAMS);
399 if (demangled_name == NULL)
401 // Not a C++ symbol, so it can't satisfy these flags
403 else if (parameters->options().dynamic_list_cpp_new()
404 && (strprefix(demangled_name, "operator new")
405 || strprefix(demangled_name, "operator delete")))
407 free(demangled_name);
410 else if (parameters->options().dynamic_list_cpp_typeinfo()
411 && (strprefix(demangled_name, "typeinfo name for")
412 || strprefix(demangled_name, "typeinfo for")))
414 free(demangled_name);
418 free(demangled_name);
421 // If exporting all symbols or building a shared library,
422 // and the symbol is defined in a regular object and is
423 // externally visible, we need to add it.
424 if ((parameters->options().export_dynamic() || parameters->options().shared())
425 && !this->is_from_dynobj()
426 && !this->is_undefined()
427 && this->is_externally_visible())
433 // Return true if the final value of this symbol is known at link
437 Symbol::final_value_is_known() const
439 // If we are not generating an executable, then no final values are
440 // known, since they will change at runtime.
441 if (parameters->options().output_is_position_independent()
442 || parameters->options().relocatable())
445 // If the symbol is not from an object file, and is not undefined,
446 // then it is defined, and known.
447 if (this->source_ != FROM_OBJECT)
449 if (this->source_ != IS_UNDEFINED)
454 // If the symbol is from a dynamic object, then the final value
456 if (this->object()->is_dynamic())
459 // If the symbol is not undefined (it is defined or common),
460 // then the final value is known.
461 if (!this->is_undefined())
465 // If the symbol is undefined, then whether the final value is known
466 // depends on whether we are doing a static link. If we are doing a
467 // dynamic link, then the final value could be filled in at runtime.
468 // This could reasonably be the case for a weak undefined symbol.
469 return parameters->doing_static_link();
472 // Return the output section where this symbol is defined.
475 Symbol::output_section() const
477 switch (this->source_)
481 unsigned int shndx = this->u_.from_object.shndx;
482 if (shndx != elfcpp::SHN_UNDEF && this->is_ordinary_shndx_)
484 gold_assert(!this->u_.from_object.object->is_dynamic());
485 gold_assert(this->u_.from_object.object->pluginobj() == NULL);
486 Relobj* relobj = static_cast<Relobj*>(this->u_.from_object.object);
487 return relobj->output_section(shndx);
493 return this->u_.in_output_data.output_data->output_section();
495 case IN_OUTPUT_SEGMENT:
505 // Set the symbol's output section. This is used for symbols defined
506 // in scripts. This should only be called after the symbol table has
510 Symbol::set_output_section(Output_section* os)
512 switch (this->source_)
516 gold_assert(this->output_section() == os);
519 this->source_ = IN_OUTPUT_DATA;
520 this->u_.in_output_data.output_data = os;
521 this->u_.in_output_data.offset_is_from_end = false;
523 case IN_OUTPUT_SEGMENT:
530 // Class Symbol_table.
532 Symbol_table::Symbol_table(unsigned int count,
533 const Version_script_info& version_script)
534 : saw_undefined_(0), offset_(0), table_(count), namepool_(),
535 forwarders_(), commons_(), tls_commons_(), small_commons_(),
536 large_commons_(), forced_locals_(), warnings_(),
537 version_script_(version_script), gc_(NULL), icf_(NULL)
539 namepool_.reserve(count);
542 Symbol_table::~Symbol_table()
546 // The symbol table key equality function. This is called with
550 Symbol_table::Symbol_table_eq::operator()(const Symbol_table_key& k1,
551 const Symbol_table_key& k2) const
553 return k1.first == k2.first && k1.second == k2.second;
557 Symbol_table::is_section_folded(Object* obj, unsigned int shndx) const
559 return (parameters->options().icf_enabled()
560 && this->icf_->is_section_folded(obj, shndx));
563 // For symbols that have been listed with a -u or --export-dynamic-symbol
564 // option, add them to the work list to avoid gc'ing them.
567 Symbol_table::gc_mark_undef_symbols(Layout* layout)
569 for (options::String_set::const_iterator p =
570 parameters->options().undefined_begin();
571 p != parameters->options().undefined_end();
574 const char* name = p->c_str();
575 Symbol* sym = this->lookup(name);
576 gold_assert(sym != NULL);
577 if (sym->source() == Symbol::FROM_OBJECT
578 && !sym->object()->is_dynamic())
580 this->gc_mark_symbol(sym);
584 for (options::String_set::const_iterator p =
585 parameters->options().export_dynamic_symbol_begin();
586 p != parameters->options().export_dynamic_symbol_end();
589 const char* name = p->c_str();
590 Symbol* sym = this->lookup(name);
591 // It's not an error if a symbol named by --export-dynamic-symbol
594 && sym->source() == Symbol::FROM_OBJECT
595 && !sym->object()->is_dynamic())
597 this->gc_mark_symbol(sym);
601 for (Script_options::referenced_const_iterator p =
602 layout->script_options()->referenced_begin();
603 p != layout->script_options()->referenced_end();
606 Symbol* sym = this->lookup(p->c_str());
607 gold_assert(sym != NULL);
608 if (sym->source() == Symbol::FROM_OBJECT
609 && !sym->object()->is_dynamic())
611 this->gc_mark_symbol(sym);
617 Symbol_table::gc_mark_symbol(Symbol* sym)
619 // Add the object and section to the work list.
621 unsigned int shndx = sym->shndx(&is_ordinary);
622 if (is_ordinary && shndx != elfcpp::SHN_UNDEF)
624 gold_assert(this->gc_!= NULL);
625 this->gc_->worklist().push(Section_id(sym->object(), shndx));
627 parameters->target().gc_mark_symbol(this, sym);
630 // When doing garbage collection, keep symbols that have been seen in
633 Symbol_table::gc_mark_dyn_syms(Symbol* sym)
635 if (sym->in_dyn() && sym->source() == Symbol::FROM_OBJECT
636 && !sym->object()->is_dynamic())
637 this->gc_mark_symbol(sym);
640 // Make TO a symbol which forwards to FROM.
643 Symbol_table::make_forwarder(Symbol* from, Symbol* to)
645 gold_assert(from != to);
646 gold_assert(!from->is_forwarder() && !to->is_forwarder());
647 this->forwarders_[from] = to;
648 from->set_forwarder();
651 // Resolve the forwards from FROM, returning the real symbol.
654 Symbol_table::resolve_forwards(const Symbol* from) const
656 gold_assert(from->is_forwarder());
657 Unordered_map<const Symbol*, Symbol*>::const_iterator p =
658 this->forwarders_.find(from);
659 gold_assert(p != this->forwarders_.end());
663 // Look up a symbol by name.
666 Symbol_table::lookup(const char* name, const char* version) const
668 Stringpool::Key name_key;
669 name = this->namepool_.find(name, &name_key);
673 Stringpool::Key version_key = 0;
676 version = this->namepool_.find(version, &version_key);
681 Symbol_table_key key(name_key, version_key);
682 Symbol_table::Symbol_table_type::const_iterator p = this->table_.find(key);
683 if (p == this->table_.end())
688 // Resolve a Symbol with another Symbol. This is only used in the
689 // unusual case where there are references to both an unversioned
690 // symbol and a symbol with a version, and we then discover that that
691 // version is the default version. Because this is unusual, we do
692 // this the slow way, by converting back to an ELF symbol.
694 template<int size, bool big_endian>
696 Symbol_table::resolve(Sized_symbol<size>* to, const Sized_symbol<size>* from)
698 unsigned char buf[elfcpp::Elf_sizes<size>::sym_size];
699 elfcpp::Sym_write<size, big_endian> esym(buf);
700 // We don't bother to set the st_name or the st_shndx field.
701 esym.put_st_value(from->value());
702 esym.put_st_size(from->symsize());
703 esym.put_st_info(from->binding(), from->type());
704 esym.put_st_other(from->visibility(), from->nonvis());
706 unsigned int shndx = from->shndx(&is_ordinary);
707 this->resolve(to, esym.sym(), shndx, is_ordinary, shndx, from->object(),
713 if (parameters->options().gc_sections())
714 this->gc_mark_dyn_syms(to);
717 // Record that a symbol is forced to be local by a version script or
721 Symbol_table::force_local(Symbol* sym)
723 if (!sym->is_defined() && !sym->is_common())
725 if (sym->is_forced_local())
727 // We already got this one.
730 sym->set_is_forced_local();
731 this->forced_locals_.push_back(sym);
734 // Adjust NAME for wrapping, and update *NAME_KEY if necessary. This
735 // is only called for undefined symbols, when at least one --wrap
739 Symbol_table::wrap_symbol(const char* name, Stringpool::Key* name_key)
741 // For some targets, we need to ignore a specific character when
742 // wrapping, and add it back later.
744 if (name[0] == parameters->target().wrap_char())
750 if (parameters->options().is_wrap(name))
752 // Turn NAME into __wrap_NAME.
759 // This will give us both the old and new name in NAMEPOOL_, but
760 // that is OK. Only the versions we need will wind up in the
761 // real string table in the output file.
762 return this->namepool_.add(s.c_str(), true, name_key);
765 const char* const real_prefix = "__real_";
766 const size_t real_prefix_length = strlen(real_prefix);
767 if (strncmp(name, real_prefix, real_prefix_length) == 0
768 && parameters->options().is_wrap(name + real_prefix_length))
770 // Turn __real_NAME into NAME.
774 s += name + real_prefix_length;
775 return this->namepool_.add(s.c_str(), true, name_key);
781 // This is called when we see a symbol NAME/VERSION, and the symbol
782 // already exists in the symbol table, and VERSION is marked as being
783 // the default version. SYM is the NAME/VERSION symbol we just added.
784 // DEFAULT_IS_NEW is true if this is the first time we have seen the
785 // symbol NAME/NULL. PDEF points to the entry for NAME/NULL.
787 template<int size, bool big_endian>
789 Symbol_table::define_default_version(Sized_symbol<size>* sym,
791 Symbol_table_type::iterator pdef)
795 // This is the first time we have seen NAME/NULL. Make
796 // NAME/NULL point to NAME/VERSION, and mark SYM as the default
799 sym->set_is_default();
801 else if (pdef->second == sym)
803 // NAME/NULL already points to NAME/VERSION. Don't mark the
804 // symbol as the default if it is not already the default.
808 // This is the unfortunate case where we already have entries
809 // for both NAME/VERSION and NAME/NULL. We now see a symbol
810 // NAME/VERSION where VERSION is the default version. We have
811 // already resolved this new symbol with the existing
812 // NAME/VERSION symbol.
814 // It's possible that NAME/NULL and NAME/VERSION are both
815 // defined in regular objects. This can only happen if one
816 // object file defines foo and another defines foo@@ver. This
817 // is somewhat obscure, but we call it a multiple definition
820 // It's possible that NAME/NULL actually has a version, in which
821 // case it won't be the same as VERSION. This happens with
822 // ver_test_7.so in the testsuite for the symbol t2_2. We see
823 // t2_2@@VER2, so we define both t2_2/VER2 and t2_2/NULL. We
824 // then see an unadorned t2_2 in an object file and give it
825 // version VER1 from the version script. This looks like a
826 // default definition for VER1, so it looks like we should merge
827 // t2_2/NULL with t2_2/VER1. That doesn't make sense, but it's
828 // not obvious that this is an error, either. So we just punt.
830 // If one of the symbols has non-default visibility, and the
831 // other is defined in a shared object, then they are different
834 // Otherwise, we just resolve the symbols as though they were
837 if (pdef->second->version() != NULL)
838 gold_assert(pdef->second->version() != sym->version());
839 else if (sym->visibility() != elfcpp::STV_DEFAULT
840 && pdef->second->is_from_dynobj())
842 else if (pdef->second->visibility() != elfcpp::STV_DEFAULT
843 && sym->is_from_dynobj())
847 const Sized_symbol<size>* symdef;
848 symdef = this->get_sized_symbol<size>(pdef->second);
849 Symbol_table::resolve<size, big_endian>(sym, symdef);
850 this->make_forwarder(pdef->second, sym);
852 sym->set_is_default();
857 // Add one symbol from OBJECT to the symbol table. NAME is symbol
858 // name and VERSION is the version; both are canonicalized. DEF is
859 // whether this is the default version. ST_SHNDX is the symbol's
860 // section index; IS_ORDINARY is whether this is a normal section
861 // rather than a special code.
863 // If IS_DEFAULT_VERSION is true, then this is the definition of a
864 // default version of a symbol. That means that any lookup of
865 // NAME/NULL and any lookup of NAME/VERSION should always return the
866 // same symbol. This is obvious for references, but in particular we
867 // want to do this for definitions: overriding NAME/NULL should also
868 // override NAME/VERSION. If we don't do that, it would be very hard
869 // to override functions in a shared library which uses versioning.
871 // We implement this by simply making both entries in the hash table
872 // point to the same Symbol structure. That is easy enough if this is
873 // the first time we see NAME/NULL or NAME/VERSION, but it is possible
874 // that we have seen both already, in which case they will both have
875 // independent entries in the symbol table. We can't simply change
876 // the symbol table entry, because we have pointers to the entries
877 // attached to the object files. So we mark the entry attached to the
878 // object file as a forwarder, and record it in the forwarders_ map.
879 // Note that entries in the hash table will never be marked as
882 // ORIG_ST_SHNDX and ST_SHNDX are almost always the same.
883 // ORIG_ST_SHNDX is the section index in the input file, or SHN_UNDEF
884 // for a special section code. ST_SHNDX may be modified if the symbol
885 // is defined in a section being discarded.
887 template<int size, bool big_endian>
889 Symbol_table::add_from_object(Object* object,
891 Stringpool::Key name_key,
893 Stringpool::Key version_key,
894 bool is_default_version,
895 const elfcpp::Sym<size, big_endian>& sym,
896 unsigned int st_shndx,
898 unsigned int orig_st_shndx)
900 // Print a message if this symbol is being traced.
901 if (parameters->options().is_trace_symbol(name))
903 if (orig_st_shndx == elfcpp::SHN_UNDEF)
904 gold_info(_("%s: reference to %s"), object->name().c_str(), name);
906 gold_info(_("%s: definition of %s"), object->name().c_str(), name);
909 // For an undefined symbol, we may need to adjust the name using
911 if (orig_st_shndx == elfcpp::SHN_UNDEF
912 && parameters->options().any_wrap())
914 const char* wrap_name = this->wrap_symbol(name, &name_key);
915 if (wrap_name != name)
917 // If we see a reference to malloc with version GLIBC_2.0,
918 // and we turn it into a reference to __wrap_malloc, then we
919 // discard the version number. Otherwise the user would be
920 // required to specify the correct version for
928 Symbol* const snull = NULL;
929 std::pair<typename Symbol_table_type::iterator, bool> ins =
930 this->table_.insert(std::make_pair(std::make_pair(name_key, version_key),
933 std::pair<typename Symbol_table_type::iterator, bool> insdefault =
934 std::make_pair(this->table_.end(), false);
935 if (is_default_version)
937 const Stringpool::Key vnull_key = 0;
938 insdefault = this->table_.insert(std::make_pair(std::make_pair(name_key,
943 // ins.first: an iterator, which is a pointer to a pair.
944 // ins.first->first: the key (a pair of name and version).
945 // ins.first->second: the value (Symbol*).
946 // ins.second: true if new entry was inserted, false if not.
948 Sized_symbol<size>* ret;
953 // We already have an entry for NAME/VERSION.
954 ret = this->get_sized_symbol<size>(ins.first->second);
955 gold_assert(ret != NULL);
957 was_undefined = ret->is_undefined();
958 was_common = ret->is_common();
960 this->resolve(ret, sym, st_shndx, is_ordinary, orig_st_shndx, object,
962 if (parameters->options().gc_sections())
963 this->gc_mark_dyn_syms(ret);
965 if (is_default_version)
966 this->define_default_version<size, big_endian>(ret, insdefault.second,
971 // This is the first time we have seen NAME/VERSION.
972 gold_assert(ins.first->second == NULL);
974 if (is_default_version && !insdefault.second)
976 // We already have an entry for NAME/NULL. If we override
977 // it, then change it to NAME/VERSION.
978 ret = this->get_sized_symbol<size>(insdefault.first->second);
980 was_undefined = ret->is_undefined();
981 was_common = ret->is_common();
983 this->resolve(ret, sym, st_shndx, is_ordinary, orig_st_shndx, object,
985 if (parameters->options().gc_sections())
986 this->gc_mark_dyn_syms(ret);
987 ins.first->second = ret;
991 was_undefined = false;
994 Sized_target<size, big_endian>* target =
995 parameters->sized_target<size, big_endian>();
996 if (!target->has_make_symbol())
997 ret = new Sized_symbol<size>();
1000 ret = target->make_symbol();
1003 // This means that we don't want a symbol table
1005 if (!is_default_version)
1006 this->table_.erase(ins.first);
1009 this->table_.erase(insdefault.first);
1010 // Inserting INSDEFAULT invalidated INS.
1011 this->table_.erase(std::make_pair(name_key,
1018 ret->init_object(name, version, object, sym, st_shndx, is_ordinary);
1020 ins.first->second = ret;
1021 if (is_default_version)
1023 // This is the first time we have seen NAME/NULL. Point
1024 // it at the new entry for NAME/VERSION.
1025 gold_assert(insdefault.second);
1026 insdefault.first->second = ret;
1030 if (is_default_version)
1031 ret->set_is_default();
1034 // Record every time we see a new undefined symbol, to speed up
1036 if (!was_undefined && ret->is_undefined())
1038 ++this->saw_undefined_;
1039 if (parameters->options().has_plugins())
1040 parameters->options().plugins()->new_undefined_symbol(ret);
1043 // Keep track of common symbols, to speed up common symbol
1045 if (!was_common && ret->is_common())
1047 if (ret->type() == elfcpp::STT_TLS)
1048 this->tls_commons_.push_back(ret);
1049 else if (!is_ordinary
1050 && st_shndx == parameters->target().small_common_shndx())
1051 this->small_commons_.push_back(ret);
1052 else if (!is_ordinary
1053 && st_shndx == parameters->target().large_common_shndx())
1054 this->large_commons_.push_back(ret);
1056 this->commons_.push_back(ret);
1059 // If we're not doing a relocatable link, then any symbol with
1060 // hidden or internal visibility is local.
1061 if ((ret->visibility() == elfcpp::STV_HIDDEN
1062 || ret->visibility() == elfcpp::STV_INTERNAL)
1063 && (ret->binding() == elfcpp::STB_GLOBAL
1064 || ret->binding() == elfcpp::STB_GNU_UNIQUE
1065 || ret->binding() == elfcpp::STB_WEAK)
1066 && !parameters->options().relocatable())
1067 this->force_local(ret);
1072 // Add all the symbols in a relocatable object to the hash table.
1074 template<int size, bool big_endian>
1076 Symbol_table::add_from_relobj(
1077 Sized_relobj_file<size, big_endian>* relobj,
1078 const unsigned char* syms,
1080 size_t symndx_offset,
1081 const char* sym_names,
1082 size_t sym_name_size,
1083 typename Sized_relobj_file<size, big_endian>::Symbols* sympointers,
1088 gold_assert(size == parameters->target().get_size());
1090 const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
1092 const bool just_symbols = relobj->just_symbols();
1094 const unsigned char* p = syms;
1095 for (size_t i = 0; i < count; ++i, p += sym_size)
1097 (*sympointers)[i] = NULL;
1099 elfcpp::Sym<size, big_endian> sym(p);
1101 unsigned int st_name = sym.get_st_name();
1102 if (st_name >= sym_name_size)
1104 relobj->error(_("bad global symbol name offset %u at %zu"),
1109 const char* name = sym_names + st_name;
1112 unsigned int st_shndx = relobj->adjust_sym_shndx(i + symndx_offset,
1115 unsigned int orig_st_shndx = st_shndx;
1117 orig_st_shndx = elfcpp::SHN_UNDEF;
1119 if (st_shndx != elfcpp::SHN_UNDEF)
1122 // A symbol defined in a section which we are not including must
1123 // be treated as an undefined symbol.
1124 bool is_defined_in_discarded_section = false;
1125 if (st_shndx != elfcpp::SHN_UNDEF
1127 && !relobj->is_section_included(st_shndx)
1128 && !this->is_section_folded(relobj, st_shndx))
1130 st_shndx = elfcpp::SHN_UNDEF;
1131 is_defined_in_discarded_section = true;
1134 // In an object file, an '@' in the name separates the symbol
1135 // name from the version name. If there are two '@' characters,
1136 // this is the default version.
1137 const char* ver = strchr(name, '@');
1138 Stringpool::Key ver_key = 0;
1140 // IS_DEFAULT_VERSION: is the version default?
1141 // IS_FORCED_LOCAL: is the symbol forced local?
1142 bool is_default_version = false;
1143 bool is_forced_local = false;
1145 // FIXME: For incremental links, we don't store version information,
1146 // so we need to ignore version symbols for now.
1147 if (parameters->incremental_update() && ver != NULL)
1149 namelen = ver - name;
1155 // The symbol name is of the form foo@VERSION or foo@@VERSION
1156 namelen = ver - name;
1160 is_default_version = true;
1163 ver = this->namepool_.add(ver, true, &ver_key);
1165 // We don't want to assign a version to an undefined symbol,
1166 // even if it is listed in the version script. FIXME: What
1167 // about a common symbol?
1170 namelen = strlen(name);
1171 if (!this->version_script_.empty()
1172 && st_shndx != elfcpp::SHN_UNDEF)
1174 // The symbol name did not have a version, but the
1175 // version script may assign a version anyway.
1176 std::string version;
1178 if (this->version_script_.get_symbol_version(name, &version,
1182 is_forced_local = true;
1183 else if (!version.empty())
1185 ver = this->namepool_.add_with_length(version.c_str(),
1189 is_default_version = true;
1195 elfcpp::Sym<size, big_endian>* psym = &sym;
1196 unsigned char symbuf[sym_size];
1197 elfcpp::Sym<size, big_endian> sym2(symbuf);
1200 memcpy(symbuf, p, sym_size);
1201 elfcpp::Sym_write<size, big_endian> sw(symbuf);
1202 if (orig_st_shndx != elfcpp::SHN_UNDEF
1204 && relobj->e_type() == elfcpp::ET_REL)
1206 // Symbol values in relocatable object files are section
1207 // relative. This is normally what we want, but since here
1208 // we are converting the symbol to absolute we need to add
1209 // the section address. The section address in an object
1210 // file is normally zero, but people can use a linker
1211 // script to change it.
1212 sw.put_st_value(sym.get_st_value()
1213 + relobj->section_address(orig_st_shndx));
1215 st_shndx = elfcpp::SHN_ABS;
1216 is_ordinary = false;
1220 // Fix up visibility if object has no-export set.
1221 if (relobj->no_export()
1222 && (orig_st_shndx != elfcpp::SHN_UNDEF || !is_ordinary))
1224 // We may have copied symbol already above.
1227 memcpy(symbuf, p, sym_size);
1231 elfcpp::STV visibility = sym2.get_st_visibility();
1232 if (visibility == elfcpp::STV_DEFAULT
1233 || visibility == elfcpp::STV_PROTECTED)
1235 elfcpp::Sym_write<size, big_endian> sw(symbuf);
1236 unsigned char nonvis = sym2.get_st_nonvis();
1237 sw.put_st_other(elfcpp::STV_HIDDEN, nonvis);
1241 Stringpool::Key name_key;
1242 name = this->namepool_.add_with_length(name, namelen, true,
1245 Sized_symbol<size>* res;
1246 res = this->add_from_object(relobj, name, name_key, ver, ver_key,
1247 is_default_version, *psym, st_shndx,
1248 is_ordinary, orig_st_shndx);
1250 if (is_forced_local)
1251 this->force_local(res);
1253 // Do not treat this symbol as garbage if this symbol will be
1254 // exported to the dynamic symbol table. This is true when
1255 // building a shared library or using --export-dynamic and
1256 // the symbol is externally visible.
1257 if (parameters->options().gc_sections()
1258 && res->is_externally_visible()
1259 && !res->is_from_dynobj()
1260 && (parameters->options().shared()
1261 || parameters->options().export_dynamic()
1262 || parameters->options().in_dynamic_list(res->name())))
1263 this->gc_mark_symbol(res);
1265 if (is_defined_in_discarded_section)
1266 res->set_is_defined_in_discarded_section();
1268 (*sympointers)[i] = res;
1272 // Add a symbol from a plugin-claimed file.
1274 template<int size, bool big_endian>
1276 Symbol_table::add_from_pluginobj(
1277 Sized_pluginobj<size, big_endian>* obj,
1280 elfcpp::Sym<size, big_endian>* sym)
1282 unsigned int st_shndx = sym->get_st_shndx();
1283 bool is_ordinary = st_shndx < elfcpp::SHN_LORESERVE;
1285 Stringpool::Key ver_key = 0;
1286 bool is_default_version = false;
1287 bool is_forced_local = false;
1291 ver = this->namepool_.add(ver, true, &ver_key);
1293 // We don't want to assign a version to an undefined symbol,
1294 // even if it is listed in the version script. FIXME: What
1295 // about a common symbol?
1298 if (!this->version_script_.empty()
1299 && st_shndx != elfcpp::SHN_UNDEF)
1301 // The symbol name did not have a version, but the
1302 // version script may assign a version anyway.
1303 std::string version;
1305 if (this->version_script_.get_symbol_version(name, &version,
1309 is_forced_local = true;
1310 else if (!version.empty())
1312 ver = this->namepool_.add_with_length(version.c_str(),
1316 is_default_version = true;
1322 Stringpool::Key name_key;
1323 name = this->namepool_.add(name, true, &name_key);
1325 Sized_symbol<size>* res;
1326 res = this->add_from_object(obj, name, name_key, ver, ver_key,
1327 is_default_version, *sym, st_shndx,
1328 is_ordinary, st_shndx);
1330 if (is_forced_local)
1331 this->force_local(res);
1336 // Add all the symbols in a dynamic object to the hash table.
1338 template<int size, bool big_endian>
1340 Symbol_table::add_from_dynobj(
1341 Sized_dynobj<size, big_endian>* dynobj,
1342 const unsigned char* syms,
1344 const char* sym_names,
1345 size_t sym_name_size,
1346 const unsigned char* versym,
1348 const std::vector<const char*>* version_map,
1349 typename Sized_relobj_file<size, big_endian>::Symbols* sympointers,
1354 gold_assert(size == parameters->target().get_size());
1356 if (dynobj->just_symbols())
1358 gold_error(_("--just-symbols does not make sense with a shared object"));
1362 // FIXME: For incremental links, we don't store version information,
1363 // so we need to ignore version symbols for now.
1364 if (parameters->incremental_update())
1367 if (versym != NULL && versym_size / 2 < count)
1369 dynobj->error(_("too few symbol versions"));
1373 const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
1375 // We keep a list of all STT_OBJECT symbols, so that we can resolve
1376 // weak aliases. This is necessary because if the dynamic object
1377 // provides the same variable under two names, one of which is a
1378 // weak definition, and the regular object refers to the weak
1379 // definition, we have to put both the weak definition and the
1380 // strong definition into the dynamic symbol table. Given a weak
1381 // definition, the only way that we can find the corresponding
1382 // strong definition, if any, is to search the symbol table.
1383 std::vector<Sized_symbol<size>*> object_symbols;
1385 const unsigned char* p = syms;
1386 const unsigned char* vs = versym;
1387 for (size_t i = 0; i < count; ++i, p += sym_size, vs += 2)
1389 elfcpp::Sym<size, big_endian> sym(p);
1391 if (sympointers != NULL)
1392 (*sympointers)[i] = NULL;
1394 // Ignore symbols with local binding or that have
1395 // internal or hidden visibility.
1396 if (sym.get_st_bind() == elfcpp::STB_LOCAL
1397 || sym.get_st_visibility() == elfcpp::STV_INTERNAL
1398 || sym.get_st_visibility() == elfcpp::STV_HIDDEN)
1401 // A protected symbol in a shared library must be treated as a
1402 // normal symbol when viewed from outside the shared library.
1403 // Implement this by overriding the visibility here.
1404 elfcpp::Sym<size, big_endian>* psym = &sym;
1405 unsigned char symbuf[sym_size];
1406 elfcpp::Sym<size, big_endian> sym2(symbuf);
1407 if (sym.get_st_visibility() == elfcpp::STV_PROTECTED)
1409 memcpy(symbuf, p, sym_size);
1410 elfcpp::Sym_write<size, big_endian> sw(symbuf);
1411 sw.put_st_other(elfcpp::STV_DEFAULT, sym.get_st_nonvis());
1415 unsigned int st_name = psym->get_st_name();
1416 if (st_name >= sym_name_size)
1418 dynobj->error(_("bad symbol name offset %u at %zu"),
1423 const char* name = sym_names + st_name;
1426 unsigned int st_shndx = dynobj->adjust_sym_shndx(i, psym->get_st_shndx(),
1429 if (st_shndx != elfcpp::SHN_UNDEF)
1432 Sized_symbol<size>* res;
1436 Stringpool::Key name_key;
1437 name = this->namepool_.add(name, true, &name_key);
1438 res = this->add_from_object(dynobj, name, name_key, NULL, 0,
1439 false, *psym, st_shndx, is_ordinary,
1444 // Read the version information.
1446 unsigned int v = elfcpp::Swap<16, big_endian>::readval(vs);
1448 bool hidden = (v & elfcpp::VERSYM_HIDDEN) != 0;
1449 v &= elfcpp::VERSYM_VERSION;
1451 // The Sun documentation says that V can be VER_NDX_LOCAL,
1452 // or VER_NDX_GLOBAL, or a version index. The meaning of
1453 // VER_NDX_LOCAL is defined as "Symbol has local scope."
1454 // The old GNU linker will happily generate VER_NDX_LOCAL
1455 // for an undefined symbol. I don't know what the Sun
1456 // linker will generate.
1458 if (v == static_cast<unsigned int>(elfcpp::VER_NDX_LOCAL)
1459 && st_shndx != elfcpp::SHN_UNDEF)
1461 // This symbol should not be visible outside the object.
1465 // At this point we are definitely going to add this symbol.
1466 Stringpool::Key name_key;
1467 name = this->namepool_.add(name, true, &name_key);
1469 if (v == static_cast<unsigned int>(elfcpp::VER_NDX_LOCAL)
1470 || v == static_cast<unsigned int>(elfcpp::VER_NDX_GLOBAL))
1472 // This symbol does not have a version.
1473 res = this->add_from_object(dynobj, name, name_key, NULL, 0,
1474 false, *psym, st_shndx, is_ordinary,
1479 if (v >= version_map->size())
1481 dynobj->error(_("versym for symbol %zu out of range: %u"),
1486 const char* version = (*version_map)[v];
1487 if (version == NULL)
1489 dynobj->error(_("versym for symbol %zu has no name: %u"),
1494 Stringpool::Key version_key;
1495 version = this->namepool_.add(version, true, &version_key);
1497 // If this is an absolute symbol, and the version name
1498 // and symbol name are the same, then this is the
1499 // version definition symbol. These symbols exist to
1500 // support using -u to pull in particular versions. We
1501 // do not want to record a version for them.
1502 if (st_shndx == elfcpp::SHN_ABS
1504 && name_key == version_key)
1505 res = this->add_from_object(dynobj, name, name_key, NULL, 0,
1506 false, *psym, st_shndx, is_ordinary,
1510 const bool is_default_version =
1511 !hidden && st_shndx != elfcpp::SHN_UNDEF;
1512 res = this->add_from_object(dynobj, name, name_key, version,
1513 version_key, is_default_version,
1515 is_ordinary, st_shndx);
1520 // Note that it is possible that RES was overridden by an
1521 // earlier object, in which case it can't be aliased here.
1522 if (st_shndx != elfcpp::SHN_UNDEF
1524 && psym->get_st_type() == elfcpp::STT_OBJECT
1525 && res->source() == Symbol::FROM_OBJECT
1526 && res->object() == dynobj)
1527 object_symbols.push_back(res);
1529 if (sympointers != NULL)
1530 (*sympointers)[i] = res;
1533 this->record_weak_aliases(&object_symbols);
1536 // Add a symbol from a incremental object file.
1538 template<int size, bool big_endian>
1540 Symbol_table::add_from_incrobj(
1544 elfcpp::Sym<size, big_endian>* sym)
1546 unsigned int st_shndx = sym->get_st_shndx();
1547 bool is_ordinary = st_shndx < elfcpp::SHN_LORESERVE;
1549 Stringpool::Key ver_key = 0;
1550 bool is_default_version = false;
1551 bool is_forced_local = false;
1553 Stringpool::Key name_key;
1554 name = this->namepool_.add(name, true, &name_key);
1556 Sized_symbol<size>* res;
1557 res = this->add_from_object(obj, name, name_key, ver, ver_key,
1558 is_default_version, *sym, st_shndx,
1559 is_ordinary, st_shndx);
1561 if (is_forced_local)
1562 this->force_local(res);
1567 // This is used to sort weak aliases. We sort them first by section
1568 // index, then by offset, then by weak ahead of strong.
1571 class Weak_alias_sorter
1574 bool operator()(const Sized_symbol<size>*, const Sized_symbol<size>*) const;
1579 Weak_alias_sorter<size>::operator()(const Sized_symbol<size>* s1,
1580 const Sized_symbol<size>* s2) const
1583 unsigned int s1_shndx = s1->shndx(&is_ordinary);
1584 gold_assert(is_ordinary);
1585 unsigned int s2_shndx = s2->shndx(&is_ordinary);
1586 gold_assert(is_ordinary);
1587 if (s1_shndx != s2_shndx)
1588 return s1_shndx < s2_shndx;
1590 if (s1->value() != s2->value())
1591 return s1->value() < s2->value();
1592 if (s1->binding() != s2->binding())
1594 if (s1->binding() == elfcpp::STB_WEAK)
1596 if (s2->binding() == elfcpp::STB_WEAK)
1599 return std::string(s1->name()) < std::string(s2->name());
1602 // SYMBOLS is a list of object symbols from a dynamic object. Look
1603 // for any weak aliases, and record them so that if we add the weak
1604 // alias to the dynamic symbol table, we also add the corresponding
1609 Symbol_table::record_weak_aliases(std::vector<Sized_symbol<size>*>* symbols)
1611 // Sort the vector by section index, then by offset, then by weak
1613 std::sort(symbols->begin(), symbols->end(), Weak_alias_sorter<size>());
1615 // Walk through the vector. For each weak definition, record
1617 for (typename std::vector<Sized_symbol<size>*>::const_iterator p =
1619 p != symbols->end();
1622 if ((*p)->binding() != elfcpp::STB_WEAK)
1625 // Build a circular list of weak aliases. Each symbol points to
1626 // the next one in the circular list.
1628 Sized_symbol<size>* from_sym = *p;
1629 typename std::vector<Sized_symbol<size>*>::const_iterator q;
1630 for (q = p + 1; q != symbols->end(); ++q)
1633 if ((*q)->shndx(&dummy) != from_sym->shndx(&dummy)
1634 || (*q)->value() != from_sym->value())
1637 this->weak_aliases_[from_sym] = *q;
1638 from_sym->set_has_alias();
1644 this->weak_aliases_[from_sym] = *p;
1645 from_sym->set_has_alias();
1652 // Create and return a specially defined symbol. If ONLY_IF_REF is
1653 // true, then only create the symbol if there is a reference to it.
1654 // If this does not return NULL, it sets *POLDSYM to the existing
1655 // symbol if there is one. This sets *RESOLVE_OLDSYM if we should
1656 // resolve the newly created symbol to the old one. This
1657 // canonicalizes *PNAME and *PVERSION.
1659 template<int size, bool big_endian>
1661 Symbol_table::define_special_symbol(const char** pname, const char** pversion,
1663 Sized_symbol<size>** poldsym,
1664 bool* resolve_oldsym)
1666 *resolve_oldsym = false;
1669 // If the caller didn't give us a version, see if we get one from
1670 // the version script.
1672 bool is_default_version = false;
1673 if (*pversion == NULL)
1676 if (this->version_script_.get_symbol_version(*pname, &v, &is_global))
1678 if (is_global && !v.empty())
1680 *pversion = v.c_str();
1681 // If we get the version from a version script, then we
1682 // are also the default version.
1683 is_default_version = true;
1689 Sized_symbol<size>* sym;
1691 bool add_to_table = false;
1692 typename Symbol_table_type::iterator add_loc = this->table_.end();
1693 bool add_def_to_table = false;
1694 typename Symbol_table_type::iterator add_def_loc = this->table_.end();
1698 oldsym = this->lookup(*pname, *pversion);
1699 if (oldsym == NULL && is_default_version)
1700 oldsym = this->lookup(*pname, NULL);
1701 if (oldsym == NULL || !oldsym->is_undefined())
1704 *pname = oldsym->name();
1705 if (is_default_version)
1706 *pversion = this->namepool_.add(*pversion, true, NULL);
1708 *pversion = oldsym->version();
1712 // Canonicalize NAME and VERSION.
1713 Stringpool::Key name_key;
1714 *pname = this->namepool_.add(*pname, true, &name_key);
1716 Stringpool::Key version_key = 0;
1717 if (*pversion != NULL)
1718 *pversion = this->namepool_.add(*pversion, true, &version_key);
1720 Symbol* const snull = NULL;
1721 std::pair<typename Symbol_table_type::iterator, bool> ins =
1722 this->table_.insert(std::make_pair(std::make_pair(name_key,
1726 std::pair<typename Symbol_table_type::iterator, bool> insdefault =
1727 std::make_pair(this->table_.end(), false);
1728 if (is_default_version)
1730 const Stringpool::Key vnull = 0;
1732 this->table_.insert(std::make_pair(std::make_pair(name_key,
1739 // We already have a symbol table entry for NAME/VERSION.
1740 oldsym = ins.first->second;
1741 gold_assert(oldsym != NULL);
1743 if (is_default_version)
1745 Sized_symbol<size>* soldsym =
1746 this->get_sized_symbol<size>(oldsym);
1747 this->define_default_version<size, big_endian>(soldsym,
1754 // We haven't seen this symbol before.
1755 gold_assert(ins.first->second == NULL);
1757 add_to_table = true;
1758 add_loc = ins.first;
1760 if (is_default_version && !insdefault.second)
1762 // We are adding NAME/VERSION, and it is the default
1763 // version. We already have an entry for NAME/NULL.
1764 oldsym = insdefault.first->second;
1765 *resolve_oldsym = true;
1771 if (is_default_version)
1773 add_def_to_table = true;
1774 add_def_loc = insdefault.first;
1780 const Target& target = parameters->target();
1781 if (!target.has_make_symbol())
1782 sym = new Sized_symbol<size>();
1785 Sized_target<size, big_endian>* sized_target =
1786 parameters->sized_target<size, big_endian>();
1787 sym = sized_target->make_symbol();
1793 add_loc->second = sym;
1795 gold_assert(oldsym != NULL);
1797 if (add_def_to_table)
1798 add_def_loc->second = sym;
1800 *poldsym = this->get_sized_symbol<size>(oldsym);
1805 // Define a symbol based on an Output_data.
1808 Symbol_table::define_in_output_data(const char* name,
1809 const char* version,
1815 elfcpp::STB binding,
1816 elfcpp::STV visibility,
1817 unsigned char nonvis,
1818 bool offset_is_from_end,
1821 if (parameters->target().get_size() == 32)
1823 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
1824 return this->do_define_in_output_data<32>(name, version, defined, od,
1825 value, symsize, type, binding,
1833 else if (parameters->target().get_size() == 64)
1835 #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
1836 return this->do_define_in_output_data<64>(name, version, defined, od,
1837 value, symsize, type, binding,
1849 // Define a symbol in an Output_data, sized version.
1853 Symbol_table::do_define_in_output_data(
1855 const char* version,
1858 typename elfcpp::Elf_types<size>::Elf_Addr value,
1859 typename elfcpp::Elf_types<size>::Elf_WXword symsize,
1861 elfcpp::STB binding,
1862 elfcpp::STV visibility,
1863 unsigned char nonvis,
1864 bool offset_is_from_end,
1867 Sized_symbol<size>* sym;
1868 Sized_symbol<size>* oldsym;
1869 bool resolve_oldsym;
1871 if (parameters->target().is_big_endian())
1873 #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG)
1874 sym = this->define_special_symbol<size, true>(&name, &version,
1875 only_if_ref, &oldsym,
1883 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE)
1884 sym = this->define_special_symbol<size, false>(&name, &version,
1885 only_if_ref, &oldsym,
1895 sym->init_output_data(name, version, od, value, symsize, type, binding,
1896 visibility, nonvis, offset_is_from_end,
1897 defined == PREDEFINED);
1901 if (binding == elfcpp::STB_LOCAL
1902 || this->version_script_.symbol_is_local(name))
1903 this->force_local(sym);
1904 else if (version != NULL)
1905 sym->set_is_default();
1909 if (Symbol_table::should_override_with_special(oldsym, type, defined))
1910 this->override_with_special(oldsym, sym);
1921 // Define a symbol based on an Output_segment.
1924 Symbol_table::define_in_output_segment(const char* name,
1925 const char* version,
1931 elfcpp::STB binding,
1932 elfcpp::STV visibility,
1933 unsigned char nonvis,
1934 Symbol::Segment_offset_base offset_base,
1937 if (parameters->target().get_size() == 32)
1939 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
1940 return this->do_define_in_output_segment<32>(name, version, defined, os,
1941 value, symsize, type,
1942 binding, visibility, nonvis,
1943 offset_base, only_if_ref);
1948 else if (parameters->target().get_size() == 64)
1950 #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
1951 return this->do_define_in_output_segment<64>(name, version, defined, os,
1952 value, symsize, type,
1953 binding, visibility, nonvis,
1954 offset_base, only_if_ref);
1963 // Define a symbol in an Output_segment, sized version.
1967 Symbol_table::do_define_in_output_segment(
1969 const char* version,
1972 typename elfcpp::Elf_types<size>::Elf_Addr value,
1973 typename elfcpp::Elf_types<size>::Elf_WXword symsize,
1975 elfcpp::STB binding,
1976 elfcpp::STV visibility,
1977 unsigned char nonvis,
1978 Symbol::Segment_offset_base offset_base,
1981 Sized_symbol<size>* sym;
1982 Sized_symbol<size>* oldsym;
1983 bool resolve_oldsym;
1985 if (parameters->target().is_big_endian())
1987 #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG)
1988 sym = this->define_special_symbol<size, true>(&name, &version,
1989 only_if_ref, &oldsym,
1997 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE)
1998 sym = this->define_special_symbol<size, false>(&name, &version,
1999 only_if_ref, &oldsym,
2009 sym->init_output_segment(name, version, os, value, symsize, type, binding,
2010 visibility, nonvis, offset_base,
2011 defined == PREDEFINED);
2015 if (binding == elfcpp::STB_LOCAL
2016 || this->version_script_.symbol_is_local(name))
2017 this->force_local(sym);
2018 else if (version != NULL)
2019 sym->set_is_default();
2023 if (Symbol_table::should_override_with_special(oldsym, type, defined))
2024 this->override_with_special(oldsym, sym);
2035 // Define a special symbol with a constant value. It is a multiple
2036 // definition error if this symbol is already defined.
2039 Symbol_table::define_as_constant(const char* name,
2040 const char* version,
2045 elfcpp::STB binding,
2046 elfcpp::STV visibility,
2047 unsigned char nonvis,
2049 bool force_override)
2051 if (parameters->target().get_size() == 32)
2053 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
2054 return this->do_define_as_constant<32>(name, version, defined, value,
2055 symsize, type, binding,
2056 visibility, nonvis, only_if_ref,
2062 else if (parameters->target().get_size() == 64)
2064 #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
2065 return this->do_define_as_constant<64>(name, version, defined, value,
2066 symsize, type, binding,
2067 visibility, nonvis, only_if_ref,
2077 // Define a symbol as a constant, sized version.
2081 Symbol_table::do_define_as_constant(
2083 const char* version,
2085 typename elfcpp::Elf_types<size>::Elf_Addr value,
2086 typename elfcpp::Elf_types<size>::Elf_WXword symsize,
2088 elfcpp::STB binding,
2089 elfcpp::STV visibility,
2090 unsigned char nonvis,
2092 bool force_override)
2094 Sized_symbol<size>* sym;
2095 Sized_symbol<size>* oldsym;
2096 bool resolve_oldsym;
2098 if (parameters->target().is_big_endian())
2100 #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG)
2101 sym = this->define_special_symbol<size, true>(&name, &version,
2102 only_if_ref, &oldsym,
2110 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE)
2111 sym = this->define_special_symbol<size, false>(&name, &version,
2112 only_if_ref, &oldsym,
2122 sym->init_constant(name, version, value, symsize, type, binding, visibility,
2123 nonvis, defined == PREDEFINED);
2127 // Version symbols are absolute symbols with name == version.
2128 // We don't want to force them to be local.
2129 if ((version == NULL
2132 && (binding == elfcpp::STB_LOCAL
2133 || this->version_script_.symbol_is_local(name)))
2134 this->force_local(sym);
2135 else if (version != NULL
2136 && (name != version || value != 0))
2137 sym->set_is_default();
2142 || Symbol_table::should_override_with_special(oldsym, type, defined))
2143 this->override_with_special(oldsym, sym);
2154 // Define a set of symbols in output sections.
2157 Symbol_table::define_symbols(const Layout* layout, int count,
2158 const Define_symbol_in_section* p,
2161 for (int i = 0; i < count; ++i, ++p)
2163 Output_section* os = layout->find_output_section(p->output_section);
2165 this->define_in_output_data(p->name, NULL, PREDEFINED, os, p->value,
2166 p->size, p->type, p->binding,
2167 p->visibility, p->nonvis,
2168 p->offset_is_from_end,
2169 only_if_ref || p->only_if_ref);
2171 this->define_as_constant(p->name, NULL, PREDEFINED, 0, p->size,
2172 p->type, p->binding, p->visibility, p->nonvis,
2173 only_if_ref || p->only_if_ref,
2178 // Define a set of symbols in output segments.
2181 Symbol_table::define_symbols(const Layout* layout, int count,
2182 const Define_symbol_in_segment* p,
2185 for (int i = 0; i < count; ++i, ++p)
2187 Output_segment* os = layout->find_output_segment(p->segment_type,
2188 p->segment_flags_set,
2189 p->segment_flags_clear);
2191 this->define_in_output_segment(p->name, NULL, PREDEFINED, os, p->value,
2192 p->size, p->type, p->binding,
2193 p->visibility, p->nonvis,
2195 only_if_ref || p->only_if_ref);
2197 this->define_as_constant(p->name, NULL, PREDEFINED, 0, p->size,
2198 p->type, p->binding, p->visibility, p->nonvis,
2199 only_if_ref || p->only_if_ref,
2204 // Define CSYM using a COPY reloc. POSD is the Output_data where the
2205 // symbol should be defined--typically a .dyn.bss section. VALUE is
2206 // the offset within POSD.
2210 Symbol_table::define_with_copy_reloc(
2211 Sized_symbol<size>* csym,
2213 typename elfcpp::Elf_types<size>::Elf_Addr value)
2215 gold_assert(csym->is_from_dynobj());
2216 gold_assert(!csym->is_copied_from_dynobj());
2217 Object* object = csym->object();
2218 gold_assert(object->is_dynamic());
2219 Dynobj* dynobj = static_cast<Dynobj*>(object);
2221 // Our copied variable has to override any variable in a shared
2223 elfcpp::STB binding = csym->binding();
2224 if (binding == elfcpp::STB_WEAK)
2225 binding = elfcpp::STB_GLOBAL;
2227 this->define_in_output_data(csym->name(), csym->version(), COPY,
2228 posd, value, csym->symsize(),
2229 csym->type(), binding,
2230 csym->visibility(), csym->nonvis(),
2233 csym->set_is_copied_from_dynobj();
2234 csym->set_needs_dynsym_entry();
2236 this->copied_symbol_dynobjs_[csym] = dynobj;
2238 // We have now defined all aliases, but we have not entered them all
2239 // in the copied_symbol_dynobjs_ map.
2240 if (csym->has_alias())
2245 sym = this->weak_aliases_[sym];
2248 gold_assert(sym->output_data() == posd);
2250 sym->set_is_copied_from_dynobj();
2251 this->copied_symbol_dynobjs_[sym] = dynobj;
2256 // SYM is defined using a COPY reloc. Return the dynamic object where
2257 // the original definition was found.
2260 Symbol_table::get_copy_source(const Symbol* sym) const
2262 gold_assert(sym->is_copied_from_dynobj());
2263 Copied_symbol_dynobjs::const_iterator p =
2264 this->copied_symbol_dynobjs_.find(sym);
2265 gold_assert(p != this->copied_symbol_dynobjs_.end());
2269 // Add any undefined symbols named on the command line.
2272 Symbol_table::add_undefined_symbols_from_command_line(Layout* layout)
2274 if (parameters->options().any_undefined()
2275 || layout->script_options()->any_unreferenced())
2277 if (parameters->target().get_size() == 32)
2279 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
2280 this->do_add_undefined_symbols_from_command_line<32>(layout);
2285 else if (parameters->target().get_size() == 64)
2287 #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
2288 this->do_add_undefined_symbols_from_command_line<64>(layout);
2300 Symbol_table::do_add_undefined_symbols_from_command_line(Layout* layout)
2302 for (options::String_set::const_iterator p =
2303 parameters->options().undefined_begin();
2304 p != parameters->options().undefined_end();
2306 this->add_undefined_symbol_from_command_line<size>(p->c_str());
2308 for (options::String_set::const_iterator p =
2309 parameters->options().export_dynamic_symbol_begin();
2310 p != parameters->options().export_dynamic_symbol_end();
2312 this->add_undefined_symbol_from_command_line<size>(p->c_str());
2314 for (Script_options::referenced_const_iterator p =
2315 layout->script_options()->referenced_begin();
2316 p != layout->script_options()->referenced_end();
2318 this->add_undefined_symbol_from_command_line<size>(p->c_str());
2323 Symbol_table::add_undefined_symbol_from_command_line(const char* name)
2325 if (this->lookup(name) != NULL)
2328 const char* version = NULL;
2330 Sized_symbol<size>* sym;
2331 Sized_symbol<size>* oldsym;
2332 bool resolve_oldsym;
2333 if (parameters->target().is_big_endian())
2335 #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG)
2336 sym = this->define_special_symbol<size, true>(&name, &version,
2345 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE)
2346 sym = this->define_special_symbol<size, false>(&name, &version,
2354 gold_assert(oldsym == NULL);
2356 sym->init_undefined(name, version, elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
2357 elfcpp::STV_DEFAULT, 0);
2358 ++this->saw_undefined_;
2361 // Set the dynamic symbol indexes. INDEX is the index of the first
2362 // global dynamic symbol. Pointers to the symbols are stored into the
2363 // vector SYMS. The names are added to DYNPOOL. This returns an
2364 // updated dynamic symbol index.
2367 Symbol_table::set_dynsym_indexes(unsigned int index,
2368 std::vector<Symbol*>* syms,
2369 Stringpool* dynpool,
2372 std::vector<Symbol*> as_needed_sym;
2374 // Allow a target to set dynsym indexes.
2375 if (parameters->target().has_custom_set_dynsym_indexes())
2377 std::vector<Symbol*> dyn_symbols;
2378 for (Symbol_table_type::iterator p = this->table_.begin();
2379 p != this->table_.end();
2382 Symbol* sym = p->second;
2383 if (!sym->should_add_dynsym_entry(this))
2384 sym->set_dynsym_index(-1U);
2386 dyn_symbols.push_back(sym);
2389 return parameters->target().set_dynsym_indexes(&dyn_symbols, index, syms,
2390 dynpool, versions, this);
2393 for (Symbol_table_type::iterator p = this->table_.begin();
2394 p != this->table_.end();
2397 Symbol* sym = p->second;
2399 // Note that SYM may already have a dynamic symbol index, since
2400 // some symbols appear more than once in the symbol table, with
2401 // and without a version.
2403 if (!sym->should_add_dynsym_entry(this))
2404 sym->set_dynsym_index(-1U);
2405 else if (!sym->has_dynsym_index())
2407 sym->set_dynsym_index(index);
2409 syms->push_back(sym);
2410 dynpool->add(sym->name(), false, NULL);
2412 // If the symbol is defined in a dynamic object and is
2413 // referenced strongly in a regular object, then mark the
2414 // dynamic object as needed. This is used to implement
2416 if (sym->is_from_dynobj()
2418 && !sym->is_undef_binding_weak())
2419 sym->object()->set_is_needed();
2421 // Record any version information, except those from
2422 // as-needed libraries not seen to be needed. Note that the
2423 // is_needed state for such libraries can change in this loop.
2424 if (sym->version() != NULL)
2426 if (!sym->is_from_dynobj()
2427 || !sym->object()->as_needed()
2428 || sym->object()->is_needed())
2429 versions->record_version(this, dynpool, sym);
2431 as_needed_sym.push_back(sym);
2436 // Process version information for symbols from as-needed libraries.
2437 for (std::vector<Symbol*>::iterator p = as_needed_sym.begin();
2438 p != as_needed_sym.end();
2443 if (sym->object()->is_needed())
2444 versions->record_version(this, dynpool, sym);
2446 sym->clear_version();
2449 // Finish up the versions. In some cases this may add new dynamic
2451 index = versions->finalize(this, index, syms);
2456 // Set the final values for all the symbols. The index of the first
2457 // global symbol in the output file is *PLOCAL_SYMCOUNT. Record the
2458 // file offset OFF. Add their names to POOL. Return the new file
2459 // offset. Update *PLOCAL_SYMCOUNT if necessary.
2462 Symbol_table::finalize(off_t off, off_t dynoff, size_t dyn_global_index,
2463 size_t dyncount, Stringpool* pool,
2464 unsigned int* plocal_symcount)
2468 gold_assert(*plocal_symcount != 0);
2469 this->first_global_index_ = *plocal_symcount;
2471 this->dynamic_offset_ = dynoff;
2472 this->first_dynamic_global_index_ = dyn_global_index;
2473 this->dynamic_count_ = dyncount;
2475 if (parameters->target().get_size() == 32)
2477 #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_32_LITTLE)
2478 ret = this->sized_finalize<32>(off, pool, plocal_symcount);
2483 else if (parameters->target().get_size() == 64)
2485 #if defined(HAVE_TARGET_64_BIG) || defined(HAVE_TARGET_64_LITTLE)
2486 ret = this->sized_finalize<64>(off, pool, plocal_symcount);
2494 // Now that we have the final symbol table, we can reliably note
2495 // which symbols should get warnings.
2496 this->warnings_.note_warnings(this);
2501 // SYM is going into the symbol table at *PINDEX. Add the name to
2502 // POOL, update *PINDEX and *POFF.
2506 Symbol_table::add_to_final_symtab(Symbol* sym, Stringpool* pool,
2507 unsigned int* pindex, off_t* poff)
2509 sym->set_symtab_index(*pindex);
2510 if (sym->version() == NULL || !parameters->options().relocatable())
2511 pool->add(sym->name(), false, NULL);
2513 pool->add(sym->versioned_name(), true, NULL);
2515 *poff += elfcpp::Elf_sizes<size>::sym_size;
2518 // Set the final value for all the symbols. This is called after
2519 // Layout::finalize, so all the output sections have their final
2524 Symbol_table::sized_finalize(off_t off, Stringpool* pool,
2525 unsigned int* plocal_symcount)
2527 off = align_address(off, size >> 3);
2528 this->offset_ = off;
2530 unsigned int index = *plocal_symcount;
2531 const unsigned int orig_index = index;
2533 // First do all the symbols which have been forced to be local, as
2534 // they must appear before all global symbols.
2535 for (Forced_locals::iterator p = this->forced_locals_.begin();
2536 p != this->forced_locals_.end();
2540 gold_assert(sym->is_forced_local());
2541 if (this->sized_finalize_symbol<size>(sym))
2543 this->add_to_final_symtab<size>(sym, pool, &index, &off);
2548 // Now do all the remaining symbols.
2549 for (Symbol_table_type::iterator p = this->table_.begin();
2550 p != this->table_.end();
2553 Symbol* sym = p->second;
2554 if (this->sized_finalize_symbol<size>(sym))
2555 this->add_to_final_symtab<size>(sym, pool, &index, &off);
2558 this->output_count_ = index - orig_index;
2563 // Compute the final value of SYM and store status in location PSTATUS.
2564 // During relaxation, this may be called multiple times for a symbol to
2565 // compute its would-be final value in each relaxation pass.
2568 typename Sized_symbol<size>::Value_type
2569 Symbol_table::compute_final_value(
2570 const Sized_symbol<size>* sym,
2571 Compute_final_value_status* pstatus) const
2573 typedef typename Sized_symbol<size>::Value_type Value_type;
2576 switch (sym->source())
2578 case Symbol::FROM_OBJECT:
2581 unsigned int shndx = sym->shndx(&is_ordinary);
2584 && shndx != elfcpp::SHN_ABS
2585 && !Symbol::is_common_shndx(shndx))
2587 *pstatus = CFVS_UNSUPPORTED_SYMBOL_SECTION;
2591 Object* symobj = sym->object();
2592 if (symobj->is_dynamic())
2595 shndx = elfcpp::SHN_UNDEF;
2597 else if (symobj->pluginobj() != NULL)
2600 shndx = elfcpp::SHN_UNDEF;
2602 else if (shndx == elfcpp::SHN_UNDEF)
2604 else if (!is_ordinary
2605 && (shndx == elfcpp::SHN_ABS
2606 || Symbol::is_common_shndx(shndx)))
2607 value = sym->value();
2610 Relobj* relobj = static_cast<Relobj*>(symobj);
2611 Output_section* os = relobj->output_section(shndx);
2613 if (this->is_section_folded(relobj, shndx))
2615 gold_assert(os == NULL);
2616 // Get the os of the section it is folded onto.
2617 Section_id folded = this->icf_->get_folded_section(relobj,
2619 gold_assert(folded.first != NULL);
2620 Relobj* folded_obj = reinterpret_cast<Relobj*>(folded.first);
2621 unsigned folded_shndx = folded.second;
2623 os = folded_obj->output_section(folded_shndx);
2624 gold_assert(os != NULL);
2626 // Replace (relobj, shndx) with canonical ICF input section.
2627 shndx = folded_shndx;
2628 relobj = folded_obj;
2631 uint64_t secoff64 = relobj->output_section_offset(shndx);
2634 bool static_or_reloc = (parameters->doing_static_link() ||
2635 parameters->options().relocatable());
2636 gold_assert(static_or_reloc || sym->dynsym_index() == -1U);
2638 *pstatus = CFVS_NO_OUTPUT_SECTION;
2642 if (secoff64 == -1ULL)
2644 // The section needs special handling (e.g., a merge section).
2646 value = os->output_address(relobj, shndx, sym->value());
2651 convert_types<Value_type, uint64_t>(secoff64);
2652 if (sym->type() == elfcpp::STT_TLS)
2653 value = sym->value() + os->tls_offset() + secoff;
2655 value = sym->value() + os->address() + secoff;
2661 case Symbol::IN_OUTPUT_DATA:
2663 Output_data* od = sym->output_data();
2664 value = sym->value();
2665 if (sym->type() != elfcpp::STT_TLS)
2666 value += od->address();
2669 Output_section* os = od->output_section();
2670 gold_assert(os != NULL);
2671 value += os->tls_offset() + (od->address() - os->address());
2673 if (sym->offset_is_from_end())
2674 value += od->data_size();
2678 case Symbol::IN_OUTPUT_SEGMENT:
2680 Output_segment* os = sym->output_segment();
2681 value = sym->value();
2682 if (sym->type() != elfcpp::STT_TLS)
2683 value += os->vaddr();
2684 switch (sym->offset_base())
2686 case Symbol::SEGMENT_START:
2688 case Symbol::SEGMENT_END:
2689 value += os->memsz();
2691 case Symbol::SEGMENT_BSS:
2692 value += os->filesz();
2700 case Symbol::IS_CONSTANT:
2701 value = sym->value();
2704 case Symbol::IS_UNDEFINED:
2716 // Finalize the symbol SYM. This returns true if the symbol should be
2717 // added to the symbol table, false otherwise.
2721 Symbol_table::sized_finalize_symbol(Symbol* unsized_sym)
2723 typedef typename Sized_symbol<size>::Value_type Value_type;
2725 Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(unsized_sym);
2727 // The default version of a symbol may appear twice in the symbol
2728 // table. We only need to finalize it once.
2729 if (sym->has_symtab_index())
2734 gold_assert(!sym->has_symtab_index());
2735 sym->set_symtab_index(-1U);
2736 gold_assert(sym->dynsym_index() == -1U);
2740 // If the symbol is only present on plugin files, the plugin decided we
2742 if (!sym->in_real_elf())
2744 gold_assert(!sym->has_symtab_index());
2745 sym->set_symtab_index(-1U);
2749 // Compute final symbol value.
2750 Compute_final_value_status status;
2751 Value_type value = this->compute_final_value(sym, &status);
2757 case CFVS_UNSUPPORTED_SYMBOL_SECTION:
2760 unsigned int shndx = sym->shndx(&is_ordinary);
2761 gold_error(_("%s: unsupported symbol section 0x%x"),
2762 sym->demangled_name().c_str(), shndx);
2765 case CFVS_NO_OUTPUT_SECTION:
2766 sym->set_symtab_index(-1U);
2772 sym->set_value(value);
2774 if (parameters->options().strip_all()
2775 || !parameters->options().should_retain_symbol(sym->name()))
2777 sym->set_symtab_index(-1U);
2784 // Write out the global symbols.
2787 Symbol_table::write_globals(const Stringpool* sympool,
2788 const Stringpool* dynpool,
2789 Output_symtab_xindex* symtab_xindex,
2790 Output_symtab_xindex* dynsym_xindex,
2791 Output_file* of) const
2793 switch (parameters->size_and_endianness())
2795 #ifdef HAVE_TARGET_32_LITTLE
2796 case Parameters::TARGET_32_LITTLE:
2797 this->sized_write_globals<32, false>(sympool, dynpool, symtab_xindex,
2801 #ifdef HAVE_TARGET_32_BIG
2802 case Parameters::TARGET_32_BIG:
2803 this->sized_write_globals<32, true>(sympool, dynpool, symtab_xindex,
2807 #ifdef HAVE_TARGET_64_LITTLE
2808 case Parameters::TARGET_64_LITTLE:
2809 this->sized_write_globals<64, false>(sympool, dynpool, symtab_xindex,
2813 #ifdef HAVE_TARGET_64_BIG
2814 case Parameters::TARGET_64_BIG:
2815 this->sized_write_globals<64, true>(sympool, dynpool, symtab_xindex,
2824 // Write out the global symbols.
2826 template<int size, bool big_endian>
2828 Symbol_table::sized_write_globals(const Stringpool* sympool,
2829 const Stringpool* dynpool,
2830 Output_symtab_xindex* symtab_xindex,
2831 Output_symtab_xindex* dynsym_xindex,
2832 Output_file* of) const
2834 const Target& target = parameters->target();
2836 const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
2838 const unsigned int output_count = this->output_count_;
2839 const section_size_type oview_size = output_count * sym_size;
2840 const unsigned int first_global_index = this->first_global_index_;
2841 unsigned char* psyms;
2842 if (this->offset_ == 0 || output_count == 0)
2845 psyms = of->get_output_view(this->offset_, oview_size);
2847 const unsigned int dynamic_count = this->dynamic_count_;
2848 const section_size_type dynamic_size = dynamic_count * sym_size;
2849 const unsigned int first_dynamic_global_index =
2850 this->first_dynamic_global_index_;
2851 unsigned char* dynamic_view;
2852 if (this->dynamic_offset_ == 0 || dynamic_count == 0)
2853 dynamic_view = NULL;
2855 dynamic_view = of->get_output_view(this->dynamic_offset_, dynamic_size);
2857 for (Symbol_table_type::const_iterator p = this->table_.begin();
2858 p != this->table_.end();
2861 Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(p->second);
2863 // Possibly warn about unresolved symbols in shared libraries.
2864 this->warn_about_undefined_dynobj_symbol(sym);
2866 unsigned int sym_index = sym->symtab_index();
2867 unsigned int dynsym_index;
2868 if (dynamic_view == NULL)
2871 dynsym_index = sym->dynsym_index();
2873 if (sym_index == -1U && dynsym_index == -1U)
2875 // This symbol is not included in the output file.
2880 typename elfcpp::Elf_types<size>::Elf_Addr sym_value = sym->value();
2881 typename elfcpp::Elf_types<size>::Elf_Addr dynsym_value = sym_value;
2882 elfcpp::STB binding = sym->binding();
2884 // If --no-gnu-unique is set, change STB_GNU_UNIQUE to STB_GLOBAL.
2885 if (binding == elfcpp::STB_GNU_UNIQUE
2886 && !parameters->options().gnu_unique())
2887 binding = elfcpp::STB_GLOBAL;
2889 switch (sym->source())
2891 case Symbol::FROM_OBJECT:
2894 unsigned int in_shndx = sym->shndx(&is_ordinary);
2897 && in_shndx != elfcpp::SHN_ABS
2898 && !Symbol::is_common_shndx(in_shndx))
2900 gold_error(_("%s: unsupported symbol section 0x%x"),
2901 sym->demangled_name().c_str(), in_shndx);
2906 Object* symobj = sym->object();
2907 if (symobj->is_dynamic())
2909 if (sym->needs_dynsym_value())
2910 dynsym_value = target.dynsym_value(sym);
2911 shndx = elfcpp::SHN_UNDEF;
2912 if (sym->is_undef_binding_weak())
2913 binding = elfcpp::STB_WEAK;
2915 binding = elfcpp::STB_GLOBAL;
2917 else if (symobj->pluginobj() != NULL)
2918 shndx = elfcpp::SHN_UNDEF;
2919 else if (in_shndx == elfcpp::SHN_UNDEF
2921 && (in_shndx == elfcpp::SHN_ABS
2922 || Symbol::is_common_shndx(in_shndx))))
2926 Relobj* relobj = static_cast<Relobj*>(symobj);
2927 Output_section* os = relobj->output_section(in_shndx);
2928 if (this->is_section_folded(relobj, in_shndx))
2930 // This global symbol must be written out even though
2932 // Get the os of the section it is folded onto.
2934 this->icf_->get_folded_section(relobj, in_shndx);
2935 gold_assert(folded.first !=NULL);
2936 Relobj* folded_obj =
2937 reinterpret_cast<Relobj*>(folded.first);
2938 os = folded_obj->output_section(folded.second);
2939 gold_assert(os != NULL);
2941 gold_assert(os != NULL);
2942 shndx = os->out_shndx();
2944 if (shndx >= elfcpp::SHN_LORESERVE)
2946 if (sym_index != -1U)
2947 symtab_xindex->add(sym_index, shndx);
2948 if (dynsym_index != -1U)
2949 dynsym_xindex->add(dynsym_index, shndx);
2950 shndx = elfcpp::SHN_XINDEX;
2953 // In object files symbol values are section
2955 if (parameters->options().relocatable())
2956 sym_value -= os->address();
2962 case Symbol::IN_OUTPUT_DATA:
2964 Output_data* od = sym->output_data();
2966 shndx = od->out_shndx();
2967 if (shndx >= elfcpp::SHN_LORESERVE)
2969 if (sym_index != -1U)
2970 symtab_xindex->add(sym_index, shndx);
2971 if (dynsym_index != -1U)
2972 dynsym_xindex->add(dynsym_index, shndx);
2973 shndx = elfcpp::SHN_XINDEX;
2976 // In object files symbol values are section
2978 if (parameters->options().relocatable())
2979 sym_value -= od->address();
2983 case Symbol::IN_OUTPUT_SEGMENT:
2984 shndx = elfcpp::SHN_ABS;
2987 case Symbol::IS_CONSTANT:
2988 shndx = elfcpp::SHN_ABS;
2991 case Symbol::IS_UNDEFINED:
2992 shndx = elfcpp::SHN_UNDEF;
2999 if (sym_index != -1U)
3001 sym_index -= first_global_index;
3002 gold_assert(sym_index < output_count);
3003 unsigned char* ps = psyms + (sym_index * sym_size);
3004 this->sized_write_symbol<size, big_endian>(sym, sym_value, shndx,
3005 binding, sympool, ps);
3008 if (dynsym_index != -1U)
3010 dynsym_index -= first_dynamic_global_index;
3011 gold_assert(dynsym_index < dynamic_count);
3012 unsigned char* pd = dynamic_view + (dynsym_index * sym_size);
3013 this->sized_write_symbol<size, big_endian>(sym, dynsym_value, shndx,
3014 binding, dynpool, pd);
3015 // Allow a target to adjust dynamic symbol value.
3016 parameters->target().adjust_dyn_symbol(sym, pd);
3020 of->write_output_view(this->offset_, oview_size, psyms);
3021 if (dynamic_view != NULL)
3022 of->write_output_view(this->dynamic_offset_, dynamic_size, dynamic_view);
3025 // Write out the symbol SYM, in section SHNDX, to P. POOL is the
3026 // strtab holding the name.
3028 template<int size, bool big_endian>
3030 Symbol_table::sized_write_symbol(
3031 Sized_symbol<size>* sym,
3032 typename elfcpp::Elf_types<size>::Elf_Addr value,
3034 elfcpp::STB binding,
3035 const Stringpool* pool,
3036 unsigned char* p) const
3038 elfcpp::Sym_write<size, big_endian> osym(p);
3039 if (sym->version() == NULL || !parameters->options().relocatable())
3040 osym.put_st_name(pool->get_offset(sym->name()));
3042 osym.put_st_name(pool->get_offset(sym->versioned_name()));
3043 osym.put_st_value(value);
3044 // Use a symbol size of zero for undefined symbols from shared libraries.
3045 if (shndx == elfcpp::SHN_UNDEF && sym->is_from_dynobj())
3046 osym.put_st_size(0);
3048 osym.put_st_size(sym->symsize());
3049 elfcpp::STT type = sym->type();
3050 // Turn IFUNC symbols from shared libraries into normal FUNC symbols.
3051 if (type == elfcpp::STT_GNU_IFUNC
3052 && sym->is_from_dynobj())
3053 type = elfcpp::STT_FUNC;
3054 // A version script may have overridden the default binding.
3055 if (sym->is_forced_local())
3056 osym.put_st_info(elfcpp::elf_st_info(elfcpp::STB_LOCAL, type));
3058 osym.put_st_info(elfcpp::elf_st_info(binding, type));
3059 osym.put_st_other(elfcpp::elf_st_other(sym->visibility(), sym->nonvis()));
3060 osym.put_st_shndx(shndx);
3063 // Check for unresolved symbols in shared libraries. This is
3064 // controlled by the --allow-shlib-undefined option.
3066 // We only warn about libraries for which we have seen all the
3067 // DT_NEEDED entries. We don't try to track down DT_NEEDED entries
3068 // which were not seen in this link. If we didn't see a DT_NEEDED
3069 // entry, we aren't going to be able to reliably report whether the
3070 // symbol is undefined.
3072 // We also don't warn about libraries found in a system library
3073 // directory (e.g., /lib or /usr/lib); we assume that those libraries
3074 // are OK. This heuristic avoids problems on GNU/Linux, in which -ldl
3075 // can have undefined references satisfied by ld-linux.so.
3078 Symbol_table::warn_about_undefined_dynobj_symbol(Symbol* sym) const
3081 if (sym->source() == Symbol::FROM_OBJECT
3082 && sym->object()->is_dynamic()
3083 && sym->shndx(&dummy) == elfcpp::SHN_UNDEF
3084 && sym->binding() != elfcpp::STB_WEAK
3085 && !parameters->options().allow_shlib_undefined()
3086 && !parameters->target().is_defined_by_abi(sym)
3087 && !sym->object()->is_in_system_directory())
3089 // A very ugly cast.
3090 Dynobj* dynobj = static_cast<Dynobj*>(sym->object());
3091 if (!dynobj->has_unknown_needed_entries())
3092 gold_undefined_symbol(sym);
3096 // Write out a section symbol. Return the update offset.
3099 Symbol_table::write_section_symbol(const Output_section* os,
3100 Output_symtab_xindex* symtab_xindex,
3104 switch (parameters->size_and_endianness())
3106 #ifdef HAVE_TARGET_32_LITTLE
3107 case Parameters::TARGET_32_LITTLE:
3108 this->sized_write_section_symbol<32, false>(os, symtab_xindex, of,
3112 #ifdef HAVE_TARGET_32_BIG
3113 case Parameters::TARGET_32_BIG:
3114 this->sized_write_section_symbol<32, true>(os, symtab_xindex, of,
3118 #ifdef HAVE_TARGET_64_LITTLE
3119 case Parameters::TARGET_64_LITTLE:
3120 this->sized_write_section_symbol<64, false>(os, symtab_xindex, of,
3124 #ifdef HAVE_TARGET_64_BIG
3125 case Parameters::TARGET_64_BIG:
3126 this->sized_write_section_symbol<64, true>(os, symtab_xindex, of,
3135 // Write out a section symbol, specialized for size and endianness.
3137 template<int size, bool big_endian>
3139 Symbol_table::sized_write_section_symbol(const Output_section* os,
3140 Output_symtab_xindex* symtab_xindex,
3144 const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
3146 unsigned char* pov = of->get_output_view(offset, sym_size);
3148 elfcpp::Sym_write<size, big_endian> osym(pov);
3149 osym.put_st_name(0);
3150 if (parameters->options().relocatable())
3151 osym.put_st_value(0);
3153 osym.put_st_value(os->address());
3154 osym.put_st_size(0);
3155 osym.put_st_info(elfcpp::elf_st_info(elfcpp::STB_LOCAL,
3156 elfcpp::STT_SECTION));
3157 osym.put_st_other(elfcpp::elf_st_other(elfcpp::STV_DEFAULT, 0));
3159 unsigned int shndx = os->out_shndx();
3160 if (shndx >= elfcpp::SHN_LORESERVE)
3162 symtab_xindex->add(os->symtab_index(), shndx);
3163 shndx = elfcpp::SHN_XINDEX;
3165 osym.put_st_shndx(shndx);
3167 of->write_output_view(offset, sym_size, pov);
3170 // Print statistical information to stderr. This is used for --stats.
3173 Symbol_table::print_stats() const
3175 #if defined(HAVE_TR1_UNORDERED_MAP) || defined(HAVE_EXT_HASH_MAP)
3176 fprintf(stderr, _("%s: symbol table entries: %zu; buckets: %zu\n"),
3177 program_name, this->table_.size(), this->table_.bucket_count());
3179 fprintf(stderr, _("%s: symbol table entries: %zu\n"),
3180 program_name, this->table_.size());
3182 this->namepool_.print_stats("symbol table stringpool");
3185 // We check for ODR violations by looking for symbols with the same
3186 // name for which the debugging information reports that they were
3187 // defined in disjoint source locations. When comparing the source
3188 // location, we consider instances with the same base filename to be
3189 // the same. This is because different object files/shared libraries
3190 // can include the same header file using different paths, and
3191 // different optimization settings can make the line number appear to
3192 // be a couple lines off, and we don't want to report an ODR violation
3195 // This struct is used to compare line information, as returned by
3196 // Dwarf_line_info::one_addr2line. It implements a < comparison
3197 // operator used with std::sort.
3199 struct Odr_violation_compare
3202 operator()(const std::string& s1, const std::string& s2) const
3204 // Inputs should be of the form "dirname/filename:linenum" where
3205 // "dirname/" is optional. We want to compare just the filename:linenum.
3207 // Find the last '/' in each string.
3208 std::string::size_type s1begin = s1.rfind('/');
3209 std::string::size_type s2begin = s2.rfind('/');
3210 // If there was no '/' in a string, start at the beginning.
3211 if (s1begin == std::string::npos)
3213 if (s2begin == std::string::npos)
3215 return s1.compare(s1begin, std::string::npos,
3216 s2, s2begin, std::string::npos) < 0;
3220 // Returns all of the lines attached to LOC, not just the one the
3221 // instruction actually came from.
3222 std::vector<std::string>
3223 Symbol_table::linenos_from_loc(const Task* task,
3224 const Symbol_location& loc)
3226 // We need to lock the object in order to read it. This
3227 // means that we have to run in a singleton Task. If we
3228 // want to run this in a general Task for better
3229 // performance, we will need one Task for object, plus
3230 // appropriate locking to ensure that we don't conflict with
3231 // other uses of the object. Also note, one_addr2line is not
3232 // currently thread-safe.
3233 Task_lock_obj<Object> tl(task, loc.object);
3235 std::vector<std::string> result;
3236 Symbol_location code_loc = loc;
3237 parameters->target().function_location(&code_loc);
3238 // 16 is the size of the object-cache that one_addr2line should use.
3239 std::string canonical_result = Dwarf_line_info::one_addr2line(
3240 code_loc.object, code_loc.shndx, code_loc.offset, 16, &result);
3241 if (!canonical_result.empty())
3242 result.push_back(canonical_result);
3246 // OutputIterator that records if it was ever assigned to. This
3247 // allows it to be used with std::set_intersection() to check for
3248 // intersection rather than computing the intersection.
3249 struct Check_intersection
3251 Check_intersection()
3255 bool had_intersection() const
3256 { return this->value_; }
3258 Check_intersection& operator++()
3261 Check_intersection& operator*()
3264 template<typename T>
3265 Check_intersection& operator=(const T&)
3267 this->value_ = true;
3275 // Check candidate_odr_violations_ to find symbols with the same name
3276 // but apparently different definitions (different source-file/line-no
3277 // for each line assigned to the first instruction).
3280 Symbol_table::detect_odr_violations(const Task* task,
3281 const char* output_file_name) const
3283 for (Odr_map::const_iterator it = candidate_odr_violations_.begin();
3284 it != candidate_odr_violations_.end();
3287 const char* const symbol_name = it->first;
3289 std::string first_object_name;
3290 std::vector<std::string> first_object_linenos;
3292 Unordered_set<Symbol_location, Symbol_location_hash>::const_iterator
3293 locs = it->second.begin();
3294 const Unordered_set<Symbol_location, Symbol_location_hash>::const_iterator
3295 locs_end = it->second.end();
3296 for (; locs != locs_end && first_object_linenos.empty(); ++locs)
3298 // Save the line numbers from the first definition to
3299 // compare to the other definitions. Ideally, we'd compare
3300 // every definition to every other, but we don't want to
3301 // take O(N^2) time to do this. This shortcut may cause
3302 // false negatives that appear or disappear depending on the
3303 // link order, but it won't cause false positives.
3304 first_object_name = locs->object->name();
3305 first_object_linenos = this->linenos_from_loc(task, *locs);
3308 // Sort by Odr_violation_compare to make std::set_intersection work.
3309 std::sort(first_object_linenos.begin(), first_object_linenos.end(),
3310 Odr_violation_compare());
3312 for (; locs != locs_end; ++locs)
3314 std::vector<std::string> linenos =
3315 this->linenos_from_loc(task, *locs);
3316 // linenos will be empty if we couldn't parse the debug info.
3317 if (linenos.empty())
3319 // Sort by Odr_violation_compare to make std::set_intersection work.
3320 std::sort(linenos.begin(), linenos.end(), Odr_violation_compare());
3322 Check_intersection intersection_result =
3323 std::set_intersection(first_object_linenos.begin(),
3324 first_object_linenos.end(),
3327 Check_intersection(),
3328 Odr_violation_compare());
3329 if (!intersection_result.had_intersection())
3331 gold_warning(_("while linking %s: symbol '%s' defined in "
3332 "multiple places (possible ODR violation):"),
3333 output_file_name, demangle(symbol_name).c_str());
3334 // This only prints one location from each definition,
3335 // which may not be the location we expect to intersect
3336 // with another definition. We could print the whole
3337 // set of locations, but that seems too verbose.
3338 gold_assert(!first_object_linenos.empty());
3339 gold_assert(!linenos.empty());
3340 fprintf(stderr, _(" %s from %s\n"),
3341 first_object_linenos[0].c_str(),
3342 first_object_name.c_str());
3343 fprintf(stderr, _(" %s from %s\n"),
3345 locs->object->name().c_str());
3346 // Only print one broken pair, to avoid needing to
3347 // compare against a list of the disjoint definition
3348 // locations we've found so far. (If we kept comparing
3349 // against just the first one, we'd get a lot of
3350 // redundant complaints about the second definition
3356 // We only call one_addr2line() in this function, so we can clear its cache.
3357 Dwarf_line_info::clear_addr2line_cache();
3360 // Warnings functions.
3362 // Add a new warning.
3365 Warnings::add_warning(Symbol_table* symtab, const char* name, Object* obj,
3366 const std::string& warning)
3368 name = symtab->canonicalize_name(name);
3369 this->warnings_[name].set(obj, warning);
3372 // Look through the warnings and mark the symbols for which we should
3373 // warn. This is called during Layout::finalize when we know the
3374 // sources for all the symbols.
3377 Warnings::note_warnings(Symbol_table* symtab)
3379 for (Warning_table::iterator p = this->warnings_.begin();
3380 p != this->warnings_.end();
3383 Symbol* sym = symtab->lookup(p->first, NULL);
3385 && sym->source() == Symbol::FROM_OBJECT
3386 && sym->object() == p->second.object)
3387 sym->set_has_warning();
3391 // Issue a warning. This is called when we see a relocation against a
3392 // symbol for which has a warning.
3394 template<int size, bool big_endian>
3396 Warnings::issue_warning(const Symbol* sym,
3397 const Relocate_info<size, big_endian>* relinfo,
3398 size_t relnum, off_t reloffset) const
3400 gold_assert(sym->has_warning());
3402 // We don't want to issue a warning for a relocation against the
3403 // symbol in the same object file in which the symbol is defined.
3404 if (sym->object() == relinfo->object)
3407 Warning_table::const_iterator p = this->warnings_.find(sym->name());
3408 gold_assert(p != this->warnings_.end());
3409 gold_warning_at_location(relinfo, relnum, reloffset,
3410 "%s", p->second.text.c_str());
3413 // Instantiate the templates we need. We could use the configure
3414 // script to restrict this to only the ones needed for implemented
3417 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
3420 Sized_symbol<32>::allocate_common(Output_data*, Value_type);
3423 #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
3426 Sized_symbol<64>::allocate_common(Output_data*, Value_type);
3429 #ifdef HAVE_TARGET_32_LITTLE
3432 Symbol_table::add_from_relobj<32, false>(
3433 Sized_relobj_file<32, false>* relobj,
3434 const unsigned char* syms,
3436 size_t symndx_offset,
3437 const char* sym_names,
3438 size_t sym_name_size,
3439 Sized_relobj_file<32, false>::Symbols* sympointers,
3443 #ifdef HAVE_TARGET_32_BIG
3446 Symbol_table::add_from_relobj<32, true>(
3447 Sized_relobj_file<32, true>* relobj,
3448 const unsigned char* syms,
3450 size_t symndx_offset,
3451 const char* sym_names,
3452 size_t sym_name_size,
3453 Sized_relobj_file<32, true>::Symbols* sympointers,
3457 #ifdef HAVE_TARGET_64_LITTLE
3460 Symbol_table::add_from_relobj<64, false>(
3461 Sized_relobj_file<64, false>* relobj,
3462 const unsigned char* syms,
3464 size_t symndx_offset,
3465 const char* sym_names,
3466 size_t sym_name_size,
3467 Sized_relobj_file<64, false>::Symbols* sympointers,
3471 #ifdef HAVE_TARGET_64_BIG
3474 Symbol_table::add_from_relobj<64, true>(
3475 Sized_relobj_file<64, true>* relobj,
3476 const unsigned char* syms,
3478 size_t symndx_offset,
3479 const char* sym_names,
3480 size_t sym_name_size,
3481 Sized_relobj_file<64, true>::Symbols* sympointers,
3485 #ifdef HAVE_TARGET_32_LITTLE
3488 Symbol_table::add_from_pluginobj<32, false>(
3489 Sized_pluginobj<32, false>* obj,
3492 elfcpp::Sym<32, false>* sym);
3495 #ifdef HAVE_TARGET_32_BIG
3498 Symbol_table::add_from_pluginobj<32, true>(
3499 Sized_pluginobj<32, true>* obj,
3502 elfcpp::Sym<32, true>* sym);
3505 #ifdef HAVE_TARGET_64_LITTLE
3508 Symbol_table::add_from_pluginobj<64, false>(
3509 Sized_pluginobj<64, false>* obj,
3512 elfcpp::Sym<64, false>* sym);
3515 #ifdef HAVE_TARGET_64_BIG
3518 Symbol_table::add_from_pluginobj<64, true>(
3519 Sized_pluginobj<64, true>* obj,
3522 elfcpp::Sym<64, true>* sym);
3525 #ifdef HAVE_TARGET_32_LITTLE
3528 Symbol_table::add_from_dynobj<32, false>(
3529 Sized_dynobj<32, false>* dynobj,
3530 const unsigned char* syms,
3532 const char* sym_names,
3533 size_t sym_name_size,
3534 const unsigned char* versym,
3536 const std::vector<const char*>* version_map,
3537 Sized_relobj_file<32, false>::Symbols* sympointers,
3541 #ifdef HAVE_TARGET_32_BIG
3544 Symbol_table::add_from_dynobj<32, true>(
3545 Sized_dynobj<32, true>* dynobj,
3546 const unsigned char* syms,
3548 const char* sym_names,
3549 size_t sym_name_size,
3550 const unsigned char* versym,
3552 const std::vector<const char*>* version_map,
3553 Sized_relobj_file<32, true>::Symbols* sympointers,
3557 #ifdef HAVE_TARGET_64_LITTLE
3560 Symbol_table::add_from_dynobj<64, false>(
3561 Sized_dynobj<64, false>* dynobj,
3562 const unsigned char* syms,
3564 const char* sym_names,
3565 size_t sym_name_size,
3566 const unsigned char* versym,
3568 const std::vector<const char*>* version_map,
3569 Sized_relobj_file<64, false>::Symbols* sympointers,
3573 #ifdef HAVE_TARGET_64_BIG
3576 Symbol_table::add_from_dynobj<64, true>(
3577 Sized_dynobj<64, true>* dynobj,
3578 const unsigned char* syms,
3580 const char* sym_names,
3581 size_t sym_name_size,
3582 const unsigned char* versym,
3584 const std::vector<const char*>* version_map,
3585 Sized_relobj_file<64, true>::Symbols* sympointers,
3589 #ifdef HAVE_TARGET_32_LITTLE
3592 Symbol_table::add_from_incrobj(
3596 elfcpp::Sym<32, false>* sym);
3599 #ifdef HAVE_TARGET_32_BIG
3602 Symbol_table::add_from_incrobj(
3606 elfcpp::Sym<32, true>* sym);
3609 #ifdef HAVE_TARGET_64_LITTLE
3612 Symbol_table::add_from_incrobj(
3616 elfcpp::Sym<64, false>* sym);
3619 #ifdef HAVE_TARGET_64_BIG
3622 Symbol_table::add_from_incrobj(
3626 elfcpp::Sym<64, true>* sym);
3629 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
3632 Symbol_table::define_with_copy_reloc<32>(
3633 Sized_symbol<32>* sym,
3635 elfcpp::Elf_types<32>::Elf_Addr value);
3638 #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
3641 Symbol_table::define_with_copy_reloc<64>(
3642 Sized_symbol<64>* sym,
3644 elfcpp::Elf_types<64>::Elf_Addr value);
3647 #ifdef HAVE_TARGET_32_LITTLE
3650 Warnings::issue_warning<32, false>(const Symbol* sym,
3651 const Relocate_info<32, false>* relinfo,
3652 size_t relnum, off_t reloffset) const;
3655 #ifdef HAVE_TARGET_32_BIG
3658 Warnings::issue_warning<32, true>(const Symbol* sym,
3659 const Relocate_info<32, true>* relinfo,
3660 size_t relnum, off_t reloffset) const;
3663 #ifdef HAVE_TARGET_64_LITTLE
3666 Warnings::issue_warning<64, false>(const Symbol* sym,
3667 const Relocate_info<64, false>* relinfo,
3668 size_t relnum, off_t reloffset) const;
3671 #ifdef HAVE_TARGET_64_BIG
3674 Warnings::issue_warning<64, true>(const Symbol* sym,
3675 const Relocate_info<64, true>* relinfo,
3676 size_t relnum, off_t reloffset) const;
3679 } // End namespace gold.