1 // symtab.cc -- the gold symbol table
3 // Copyright 2006, 2007, 2008 Free Software Foundation, Inc.
4 // Written by Ian Lance Taylor <iant@google.com>.
6 // This file is part of gold.
8 // This program is free software; you can redistribute it and/or modify
9 // it under the terms of the GNU General Public License as published by
10 // the Free Software Foundation; either version 3 of the License, or
11 // (at your option) any later version.
13 // This program is distributed in the hope that it will be useful,
14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 // GNU General Public License for more details.
18 // You should have received a copy of the GNU General Public License
19 // along with this program; if not, write to the Free Software
20 // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 // MA 02110-1301, USA.
34 #include "dwarf_reader.h"
38 #include "workqueue.h"
47 // Initialize fields in Symbol. This initializes everything except u_
51 Symbol::init_fields(const char* name, const char* version,
52 elfcpp::STT type, elfcpp::STB binding,
53 elfcpp::STV visibility, unsigned char nonvis)
56 this->version_ = version;
57 this->symtab_index_ = 0;
58 this->dynsym_index_ = 0;
59 this->got_offsets_.init();
60 this->plt_offset_ = 0;
62 this->binding_ = binding;
63 this->visibility_ = visibility;
64 this->nonvis_ = nonvis;
65 this->is_target_special_ = false;
66 this->is_def_ = false;
67 this->is_forwarder_ = false;
68 this->has_alias_ = false;
69 this->needs_dynsym_entry_ = false;
70 this->in_reg_ = false;
71 this->in_dyn_ = false;
72 this->has_plt_offset_ = false;
73 this->has_warning_ = false;
74 this->is_copied_from_dynobj_ = false;
75 this->is_forced_local_ = false;
76 this->is_ordinary_shndx_ = false;
77 this->in_real_elf_ = false;
80 // Return the demangled version of the symbol's name, but only
81 // if the --demangle flag was set.
84 demangle(const char* name)
86 if (!parameters->options().do_demangle())
89 // cplus_demangle allocates memory for the result it returns,
90 // and returns NULL if the name is already demangled.
91 char* demangled_name = cplus_demangle(name, DMGL_ANSI | DMGL_PARAMS);
92 if (demangled_name == NULL)
95 std::string retval(demangled_name);
101 Symbol::demangled_name() const
103 return demangle(this->name());
106 // Initialize the fields in the base class Symbol for SYM in OBJECT.
108 template<int size, bool big_endian>
110 Symbol::init_base_object(const char* name, const char* version, Object* object,
111 const elfcpp::Sym<size, big_endian>& sym,
112 unsigned int st_shndx, bool is_ordinary)
114 this->init_fields(name, version, sym.get_st_type(), sym.get_st_bind(),
115 sym.get_st_visibility(), sym.get_st_nonvis());
116 this->u_.from_object.object = object;
117 this->u_.from_object.shndx = st_shndx;
118 this->is_ordinary_shndx_ = is_ordinary;
119 this->source_ = FROM_OBJECT;
120 this->in_reg_ = !object->is_dynamic();
121 this->in_dyn_ = object->is_dynamic();
122 this->in_real_elf_ = object->pluginobj() == NULL;
125 // Initialize the fields in the base class Symbol for a symbol defined
126 // in an Output_data.
129 Symbol::init_base_output_data(const char* name, const char* version,
130 Output_data* od, elfcpp::STT type,
131 elfcpp::STB binding, elfcpp::STV visibility,
132 unsigned char nonvis, bool offset_is_from_end)
134 this->init_fields(name, version, type, binding, visibility, nonvis);
135 this->u_.in_output_data.output_data = od;
136 this->u_.in_output_data.offset_is_from_end = offset_is_from_end;
137 this->source_ = IN_OUTPUT_DATA;
138 this->in_reg_ = true;
139 this->in_real_elf_ = true;
142 // Initialize the fields in the base class Symbol for a symbol defined
143 // in an Output_segment.
146 Symbol::init_base_output_segment(const char* name, const char* version,
147 Output_segment* os, elfcpp::STT type,
148 elfcpp::STB binding, elfcpp::STV visibility,
149 unsigned char nonvis,
150 Segment_offset_base offset_base)
152 this->init_fields(name, version, type, binding, visibility, nonvis);
153 this->u_.in_output_segment.output_segment = os;
154 this->u_.in_output_segment.offset_base = offset_base;
155 this->source_ = IN_OUTPUT_SEGMENT;
156 this->in_reg_ = true;
157 this->in_real_elf_ = true;
160 // Initialize the fields in the base class Symbol for a symbol defined
164 Symbol::init_base_constant(const char* name, const char* version,
165 elfcpp::STT type, elfcpp::STB binding,
166 elfcpp::STV visibility, unsigned char nonvis)
168 this->init_fields(name, version, type, binding, visibility, nonvis);
169 this->source_ = IS_CONSTANT;
170 this->in_reg_ = true;
171 this->in_real_elf_ = true;
174 // Initialize the fields in the base class Symbol for an undefined
178 Symbol::init_base_undefined(const char* name, const char* version,
179 elfcpp::STT type, elfcpp::STB binding,
180 elfcpp::STV visibility, unsigned char nonvis)
182 this->init_fields(name, version, type, binding, visibility, nonvis);
183 this->dynsym_index_ = -1U;
184 this->source_ = IS_UNDEFINED;
185 this->in_reg_ = true;
186 this->in_real_elf_ = true;
189 // Allocate a common symbol in the base.
192 Symbol::allocate_base_common(Output_data* od)
194 gold_assert(this->is_common());
195 this->source_ = IN_OUTPUT_DATA;
196 this->u_.in_output_data.output_data = od;
197 this->u_.in_output_data.offset_is_from_end = false;
200 // Initialize the fields in Sized_symbol for SYM in OBJECT.
203 template<bool big_endian>
205 Sized_symbol<size>::init_object(const char* name, const char* version,
207 const elfcpp::Sym<size, big_endian>& sym,
208 unsigned int st_shndx, bool is_ordinary)
210 this->init_base_object(name, version, object, sym, st_shndx, is_ordinary);
211 this->value_ = sym.get_st_value();
212 this->symsize_ = sym.get_st_size();
215 // Initialize the fields in Sized_symbol for a symbol defined in an
220 Sized_symbol<size>::init_output_data(const char* name, const char* version,
221 Output_data* od, Value_type value,
222 Size_type symsize, elfcpp::STT type,
224 elfcpp::STV visibility,
225 unsigned char nonvis,
226 bool offset_is_from_end)
228 this->init_base_output_data(name, version, od, type, binding, visibility,
229 nonvis, offset_is_from_end);
230 this->value_ = value;
231 this->symsize_ = symsize;
234 // Initialize the fields in Sized_symbol for a symbol defined in an
239 Sized_symbol<size>::init_output_segment(const char* name, const char* version,
240 Output_segment* os, Value_type value,
241 Size_type symsize, elfcpp::STT type,
243 elfcpp::STV visibility,
244 unsigned char nonvis,
245 Segment_offset_base offset_base)
247 this->init_base_output_segment(name, version, os, type, binding, visibility,
248 nonvis, offset_base);
249 this->value_ = value;
250 this->symsize_ = symsize;
253 // Initialize the fields in Sized_symbol for a symbol defined as a
258 Sized_symbol<size>::init_constant(const char* name, const char* version,
259 Value_type value, Size_type symsize,
260 elfcpp::STT type, elfcpp::STB binding,
261 elfcpp::STV visibility, unsigned char nonvis)
263 this->init_base_constant(name, version, type, binding, visibility, nonvis);
264 this->value_ = value;
265 this->symsize_ = symsize;
268 // Initialize the fields in Sized_symbol for an undefined symbol.
272 Sized_symbol<size>::init_undefined(const char* name, const char* version,
273 elfcpp::STT type, elfcpp::STB binding,
274 elfcpp::STV visibility, unsigned char nonvis)
276 this->init_base_undefined(name, version, type, binding, visibility, nonvis);
281 // Allocate a common symbol.
285 Sized_symbol<size>::allocate_common(Output_data* od, Value_type value)
287 this->allocate_base_common(od);
288 this->value_ = value;
291 // Return true if this symbol should be added to the dynamic symbol
295 Symbol::should_add_dynsym_entry() const
297 // If the symbol is used by a dynamic relocation, we need to add it.
298 if (this->needs_dynsym_entry())
301 // If the symbol was forced local in a version script, do not add it.
302 if (this->is_forced_local())
305 // If exporting all symbols or building a shared library,
306 // and the symbol is defined in a regular object and is
307 // externally visible, we need to add it.
308 if ((parameters->options().export_dynamic() || parameters->options().shared())
309 && !this->is_from_dynobj()
310 && this->is_externally_visible())
316 // Return true if the final value of this symbol is known at link
320 Symbol::final_value_is_known() const
322 // If we are not generating an executable, then no final values are
323 // known, since they will change at runtime.
324 if (parameters->options().shared() || parameters->options().relocatable())
327 // If the symbol is not from an object file, and is not undefined,
328 // then it is defined, and known.
329 if (this->source_ != FROM_OBJECT)
331 if (this->source_ != IS_UNDEFINED)
336 // If the symbol is from a dynamic object, then the final value
338 if (this->object()->is_dynamic())
341 // If the symbol is not undefined (it is defined or common),
342 // then the final value is known.
343 if (!this->is_undefined())
347 // If the symbol is undefined, then whether the final value is known
348 // depends on whether we are doing a static link. If we are doing a
349 // dynamic link, then the final value could be filled in at runtime.
350 // This could reasonably be the case for a weak undefined symbol.
351 return parameters->doing_static_link();
354 // Return the output section where this symbol is defined.
357 Symbol::output_section() const
359 switch (this->source_)
363 unsigned int shndx = this->u_.from_object.shndx;
364 if (shndx != elfcpp::SHN_UNDEF && this->is_ordinary_shndx_)
366 gold_assert(!this->u_.from_object.object->is_dynamic());
367 gold_assert(this->u_.from_object.object->pluginobj() == NULL);
368 Relobj* relobj = static_cast<Relobj*>(this->u_.from_object.object);
369 return relobj->output_section(shndx);
375 return this->u_.in_output_data.output_data->output_section();
377 case IN_OUTPUT_SEGMENT:
387 // Set the symbol's output section. This is used for symbols defined
388 // in scripts. This should only be called after the symbol table has
392 Symbol::set_output_section(Output_section* os)
394 switch (this->source_)
398 gold_assert(this->output_section() == os);
401 this->source_ = IN_OUTPUT_DATA;
402 this->u_.in_output_data.output_data = os;
403 this->u_.in_output_data.offset_is_from_end = false;
405 case IN_OUTPUT_SEGMENT:
412 // Class Symbol_table.
414 Symbol_table::Symbol_table(unsigned int count,
415 const Version_script_info& version_script)
416 : saw_undefined_(0), offset_(0), table_(count), namepool_(),
417 forwarders_(), commons_(), tls_commons_(), forced_locals_(), warnings_(),
418 version_script_(version_script)
420 namepool_.reserve(count);
423 Symbol_table::~Symbol_table()
427 // The hash function. The key values are Stringpool keys.
430 Symbol_table::Symbol_table_hash::operator()(const Symbol_table_key& key) const
432 return key.first ^ key.second;
435 // The symbol table key equality function. This is called with
439 Symbol_table::Symbol_table_eq::operator()(const Symbol_table_key& k1,
440 const Symbol_table_key& k2) const
442 return k1.first == k2.first && k1.second == k2.second;
445 // Make TO a symbol which forwards to FROM.
448 Symbol_table::make_forwarder(Symbol* from, Symbol* to)
450 gold_assert(from != to);
451 gold_assert(!from->is_forwarder() && !to->is_forwarder());
452 this->forwarders_[from] = to;
453 from->set_forwarder();
456 // Resolve the forwards from FROM, returning the real symbol.
459 Symbol_table::resolve_forwards(const Symbol* from) const
461 gold_assert(from->is_forwarder());
462 Unordered_map<const Symbol*, Symbol*>::const_iterator p =
463 this->forwarders_.find(from);
464 gold_assert(p != this->forwarders_.end());
468 // Look up a symbol by name.
471 Symbol_table::lookup(const char* name, const char* version) const
473 Stringpool::Key name_key;
474 name = this->namepool_.find(name, &name_key);
478 Stringpool::Key version_key = 0;
481 version = this->namepool_.find(version, &version_key);
486 Symbol_table_key key(name_key, version_key);
487 Symbol_table::Symbol_table_type::const_iterator p = this->table_.find(key);
488 if (p == this->table_.end())
493 // Resolve a Symbol with another Symbol. This is only used in the
494 // unusual case where there are references to both an unversioned
495 // symbol and a symbol with a version, and we then discover that that
496 // version is the default version. Because this is unusual, we do
497 // this the slow way, by converting back to an ELF symbol.
499 template<int size, bool big_endian>
501 Symbol_table::resolve(Sized_symbol<size>* to, const Sized_symbol<size>* from)
503 unsigned char buf[elfcpp::Elf_sizes<size>::sym_size];
504 elfcpp::Sym_write<size, big_endian> esym(buf);
505 // We don't bother to set the st_name or the st_shndx field.
506 esym.put_st_value(from->value());
507 esym.put_st_size(from->symsize());
508 esym.put_st_info(from->binding(), from->type());
509 esym.put_st_other(from->visibility(), from->nonvis());
511 unsigned int shndx = from->shndx(&is_ordinary);
512 this->resolve(to, esym.sym(), shndx, is_ordinary, shndx, from->object(),
520 // Record that a symbol is forced to be local by a version script.
523 Symbol_table::force_local(Symbol* sym)
525 if (!sym->is_defined() && !sym->is_common())
527 if (sym->is_forced_local())
529 // We already got this one.
532 sym->set_is_forced_local();
533 this->forced_locals_.push_back(sym);
536 // Adjust NAME for wrapping, and update *NAME_KEY if necessary. This
537 // is only called for undefined symbols, when at least one --wrap
541 Symbol_table::wrap_symbol(Object* object, const char* name,
542 Stringpool::Key* name_key)
544 // For some targets, we need to ignore a specific character when
545 // wrapping, and add it back later.
547 if (name[0] == object->target()->wrap_char())
553 if (parameters->options().is_wrap(name))
555 // Turn NAME into __wrap_NAME.
562 // This will give us both the old and new name in NAMEPOOL_, but
563 // that is OK. Only the versions we need will wind up in the
564 // real string table in the output file.
565 return this->namepool_.add(s.c_str(), true, name_key);
568 const char* const real_prefix = "__real_";
569 const size_t real_prefix_length = strlen(real_prefix);
570 if (strncmp(name, real_prefix, real_prefix_length) == 0
571 && parameters->options().is_wrap(name + real_prefix_length))
573 // Turn __real_NAME into NAME.
577 s += name + real_prefix_length;
578 return this->namepool_.add(s.c_str(), true, name_key);
584 // Add one symbol from OBJECT to the symbol table. NAME is symbol
585 // name and VERSION is the version; both are canonicalized. DEF is
586 // whether this is the default version. ST_SHNDX is the symbol's
587 // section index; IS_ORDINARY is whether this is a normal section
588 // rather than a special code.
590 // If DEF is true, then this is the definition of a default version of
591 // a symbol. That means that any lookup of NAME/NULL and any lookup
592 // of NAME/VERSION should always return the same symbol. This is
593 // obvious for references, but in particular we want to do this for
594 // definitions: overriding NAME/NULL should also override
595 // NAME/VERSION. If we don't do that, it would be very hard to
596 // override functions in a shared library which uses versioning.
598 // We implement this by simply making both entries in the hash table
599 // point to the same Symbol structure. That is easy enough if this is
600 // the first time we see NAME/NULL or NAME/VERSION, but it is possible
601 // that we have seen both already, in which case they will both have
602 // independent entries in the symbol table. We can't simply change
603 // the symbol table entry, because we have pointers to the entries
604 // attached to the object files. So we mark the entry attached to the
605 // object file as a forwarder, and record it in the forwarders_ map.
606 // Note that entries in the hash table will never be marked as
609 // ORIG_ST_SHNDX and ST_SHNDX are almost always the same.
610 // ORIG_ST_SHNDX is the section index in the input file, or SHN_UNDEF
611 // for a special section code. ST_SHNDX may be modified if the symbol
612 // is defined in a section being discarded.
614 template<int size, bool big_endian>
616 Symbol_table::add_from_object(Object* object,
618 Stringpool::Key name_key,
620 Stringpool::Key version_key,
622 const elfcpp::Sym<size, big_endian>& sym,
623 unsigned int st_shndx,
625 unsigned int orig_st_shndx)
627 // Print a message if this symbol is being traced.
628 if (parameters->options().is_trace_symbol(name))
630 if (orig_st_shndx == elfcpp::SHN_UNDEF)
631 gold_info(_("%s: reference to %s"), object->name().c_str(), name);
633 gold_info(_("%s: definition of %s"), object->name().c_str(), name);
636 // For an undefined symbol, we may need to adjust the name using
638 if (orig_st_shndx == elfcpp::SHN_UNDEF
639 && parameters->options().any_wrap())
641 const char* wrap_name = this->wrap_symbol(object, name, &name_key);
642 if (wrap_name != name)
644 // If we see a reference to malloc with version GLIBC_2.0,
645 // and we turn it into a reference to __wrap_malloc, then we
646 // discard the version number. Otherwise the user would be
647 // required to specify the correct version for
655 Symbol* const snull = NULL;
656 std::pair<typename Symbol_table_type::iterator, bool> ins =
657 this->table_.insert(std::make_pair(std::make_pair(name_key, version_key),
660 std::pair<typename Symbol_table_type::iterator, bool> insdef =
661 std::make_pair(this->table_.end(), false);
664 const Stringpool::Key vnull_key = 0;
665 insdef = this->table_.insert(std::make_pair(std::make_pair(name_key,
670 // ins.first: an iterator, which is a pointer to a pair.
671 // ins.first->first: the key (a pair of name and version).
672 // ins.first->second: the value (Symbol*).
673 // ins.second: true if new entry was inserted, false if not.
675 Sized_symbol<size>* ret;
680 // We already have an entry for NAME/VERSION.
681 ret = this->get_sized_symbol<size>(ins.first->second);
682 gold_assert(ret != NULL);
684 was_undefined = ret->is_undefined();
685 was_common = ret->is_common();
687 this->resolve(ret, sym, st_shndx, is_ordinary, orig_st_shndx, object,
694 // This is the first time we have seen NAME/NULL. Make
695 // NAME/NULL point to NAME/VERSION.
696 insdef.first->second = ret;
698 else if (insdef.first->second != ret)
700 // This is the unfortunate case where we already have
701 // entries for both NAME/VERSION and NAME/NULL. We now
702 // see a symbol NAME/VERSION where VERSION is the
703 // default version. We have already resolved this new
704 // symbol with the existing NAME/VERSION symbol.
706 // It's possible that NAME/NULL and NAME/VERSION are
707 // both defined in regular objects. This can only
708 // happen if one object file defines foo and another
709 // defines foo@@ver. This is somewhat obscure, but we
710 // call it a multiple definition error.
712 // It's possible that NAME/NULL actually has a version,
713 // in which case it won't be the same as VERSION. This
714 // happens with ver_test_7.so in the testsuite for the
715 // symbol t2_2. We see t2_2@@VER2, so we define both
716 // t2_2/VER2 and t2_2/NULL. We then see an unadorned
717 // t2_2 in an object file and give it version VER1 from
718 // the version script. This looks like a default
719 // definition for VER1, so it looks like we should merge
720 // t2_2/NULL with t2_2/VER1. That doesn't make sense,
721 // but it's not obvious that this is an error, either.
724 // If one of the symbols has non-default visibility, and
725 // the other is defined in a shared object, then they
726 // are different symbols.
728 // Otherwise, we just resolve the symbols as though they
731 if (insdef.first->second->version() != NULL)
733 gold_assert(insdef.first->second->version() != version);
736 else if (ret->visibility() != elfcpp::STV_DEFAULT
737 && insdef.first->second->is_from_dynobj())
739 else if (insdef.first->second->visibility() != elfcpp::STV_DEFAULT
740 && ret->is_from_dynobj())
744 const Sized_symbol<size>* sym2;
745 sym2 = this->get_sized_symbol<size>(insdef.first->second);
746 Symbol_table::resolve<size, big_endian>(ret, sym2);
747 this->make_forwarder(insdef.first->second, ret);
748 insdef.first->second = ret;
757 // This is the first time we have seen NAME/VERSION.
758 gold_assert(ins.first->second == NULL);
760 if (def && !insdef.second)
762 // We already have an entry for NAME/NULL. If we override
763 // it, then change it to NAME/VERSION.
764 ret = this->get_sized_symbol<size>(insdef.first->second);
766 was_undefined = ret->is_undefined();
767 was_common = ret->is_common();
769 this->resolve(ret, sym, st_shndx, is_ordinary, orig_st_shndx, object,
771 ins.first->second = ret;
775 was_undefined = false;
778 Sized_target<size, big_endian>* target =
779 object->sized_target<size, big_endian>();
780 if (!target->has_make_symbol())
781 ret = new Sized_symbol<size>();
784 ret = target->make_symbol();
787 // This means that we don't want a symbol table
790 this->table_.erase(ins.first);
793 this->table_.erase(insdef.first);
794 // Inserting insdef invalidated ins.
795 this->table_.erase(std::make_pair(name_key,
802 ret->init_object(name, version, object, sym, st_shndx, is_ordinary);
804 ins.first->second = ret;
807 // This is the first time we have seen NAME/NULL. Point
808 // it at the new entry for NAME/VERSION.
809 gold_assert(insdef.second);
810 insdef.first->second = ret;
815 // Record every time we see a new undefined symbol, to speed up
817 if (!was_undefined && ret->is_undefined())
818 ++this->saw_undefined_;
820 // Keep track of common symbols, to speed up common symbol
822 if (!was_common && ret->is_common())
824 if (ret->type() != elfcpp::STT_TLS)
825 this->commons_.push_back(ret);
827 this->tls_commons_.push_back(ret);
831 ret->set_is_default();
835 // Add all the symbols in a relocatable object to the hash table.
837 template<int size, bool big_endian>
839 Symbol_table::add_from_relobj(
840 Sized_relobj<size, big_endian>* relobj,
841 const unsigned char* syms,
843 size_t symndx_offset,
844 const char* sym_names,
845 size_t sym_name_size,
846 typename Sized_relobj<size, big_endian>::Symbols* sympointers,
851 gold_assert(size == relobj->target()->get_size());
852 gold_assert(size == parameters->target().get_size());
854 const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
856 const bool just_symbols = relobj->just_symbols();
858 const unsigned char* p = syms;
859 for (size_t i = 0; i < count; ++i, p += sym_size)
861 (*sympointers)[i] = NULL;
863 elfcpp::Sym<size, big_endian> sym(p);
865 unsigned int st_name = sym.get_st_name();
866 if (st_name >= sym_name_size)
868 relobj->error(_("bad global symbol name offset %u at %zu"),
873 const char* name = sym_names + st_name;
876 unsigned int st_shndx = relobj->adjust_sym_shndx(i + symndx_offset,
879 unsigned int orig_st_shndx = st_shndx;
881 orig_st_shndx = elfcpp::SHN_UNDEF;
883 if (st_shndx != elfcpp::SHN_UNDEF)
886 // A symbol defined in a section which we are not including must
887 // be treated as an undefined symbol.
888 if (st_shndx != elfcpp::SHN_UNDEF
890 && !relobj->is_section_included(st_shndx))
891 st_shndx = elfcpp::SHN_UNDEF;
893 // In an object file, an '@' in the name separates the symbol
894 // name from the version name. If there are two '@' characters,
895 // this is the default version.
896 const char* ver = strchr(name, '@');
897 Stringpool::Key ver_key = 0;
899 // DEF: is the version default? LOCAL: is the symbol forced local?
905 // The symbol name is of the form foo@VERSION or foo@@VERSION
906 namelen = ver - name;
913 ver = this->namepool_.add(ver, true, &ver_key);
915 // We don't want to assign a version to an undefined symbol,
916 // even if it is listed in the version script. FIXME: What
917 // about a common symbol?
920 namelen = strlen(name);
921 if (!this->version_script_.empty()
922 && st_shndx != elfcpp::SHN_UNDEF)
924 // The symbol name did not have a version, but the
925 // version script may assign a version anyway.
927 if (this->version_script_.get_symbol_version(name, &version))
929 // The version can be empty if the version script is
930 // only used to force some symbols to be local.
931 if (!version.empty())
933 ver = this->namepool_.add_with_length(version.c_str(),
940 else if (this->version_script_.symbol_is_local(name))
945 elfcpp::Sym<size, big_endian>* psym = &sym;
946 unsigned char symbuf[sym_size];
947 elfcpp::Sym<size, big_endian> sym2(symbuf);
950 memcpy(symbuf, p, sym_size);
951 elfcpp::Sym_write<size, big_endian> sw(symbuf);
952 if (orig_st_shndx != elfcpp::SHN_UNDEF && is_ordinary)
954 // Symbol values in object files are section relative.
955 // This is normally what we want, but since here we are
956 // converting the symbol to absolute we need to add the
957 // section address. The section address in an object
958 // file is normally zero, but people can use a linker
959 // script to change it.
960 sw.put_st_value(sym.get_st_value()
961 + relobj->section_address(orig_st_shndx));
963 st_shndx = elfcpp::SHN_ABS;
968 Stringpool::Key name_key;
969 name = this->namepool_.add_with_length(name, namelen, true,
972 Sized_symbol<size>* res;
973 res = this->add_from_object(relobj, name, name_key, ver, ver_key,
974 def, *psym, st_shndx, is_ordinary,
978 this->force_local(res);
980 (*sympointers)[i] = res;
984 // Add a symbol from a plugin-claimed file.
986 template<int size, bool big_endian>
988 Symbol_table::add_from_pluginobj(
989 Sized_pluginobj<size, big_endian>* obj,
992 elfcpp::Sym<size, big_endian>* sym)
994 unsigned int st_shndx = sym->get_st_shndx();
996 Stringpool::Key ver_key = 0;
1002 ver = this->namepool_.add(ver, true, &ver_key);
1004 // We don't want to assign a version to an undefined symbol,
1005 // even if it is listed in the version script. FIXME: What
1006 // about a common symbol?
1009 if (!this->version_script_.empty()
1010 && st_shndx != elfcpp::SHN_UNDEF)
1012 // The symbol name did not have a version, but the
1013 // version script may assign a version anyway.
1014 std::string version;
1015 if (this->version_script_.get_symbol_version(name, &version))
1017 // The version can be empty if the version script is
1018 // only used to force some symbols to be local.
1019 if (!version.empty())
1021 ver = this->namepool_.add_with_length(version.c_str(),
1028 else if (this->version_script_.symbol_is_local(name))
1033 Stringpool::Key name_key;
1034 name = this->namepool_.add(name, true, &name_key);
1036 Sized_symbol<size>* res;
1037 res = this->add_from_object(obj, name, name_key, ver, ver_key,
1038 def, *sym, st_shndx, true, st_shndx);
1041 this->force_local(res);
1046 // Add all the symbols in a dynamic object to the hash table.
1048 template<int size, bool big_endian>
1050 Symbol_table::add_from_dynobj(
1051 Sized_dynobj<size, big_endian>* dynobj,
1052 const unsigned char* syms,
1054 const char* sym_names,
1055 size_t sym_name_size,
1056 const unsigned char* versym,
1058 const std::vector<const char*>* version_map,
1059 typename Sized_relobj<size, big_endian>::Symbols* sympointers,
1064 gold_assert(size == dynobj->target()->get_size());
1065 gold_assert(size == parameters->target().get_size());
1067 if (dynobj->just_symbols())
1069 gold_error(_("--just-symbols does not make sense with a shared object"));
1073 if (versym != NULL && versym_size / 2 < count)
1075 dynobj->error(_("too few symbol versions"));
1079 const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
1081 // We keep a list of all STT_OBJECT symbols, so that we can resolve
1082 // weak aliases. This is necessary because if the dynamic object
1083 // provides the same variable under two names, one of which is a
1084 // weak definition, and the regular object refers to the weak
1085 // definition, we have to put both the weak definition and the
1086 // strong definition into the dynamic symbol table. Given a weak
1087 // definition, the only way that we can find the corresponding
1088 // strong definition, if any, is to search the symbol table.
1089 std::vector<Sized_symbol<size>*> object_symbols;
1091 const unsigned char* p = syms;
1092 const unsigned char* vs = versym;
1093 for (size_t i = 0; i < count; ++i, p += sym_size, vs += 2)
1095 elfcpp::Sym<size, big_endian> sym(p);
1097 if (sympointers != NULL)
1098 (*sympointers)[i] = NULL;
1100 // Ignore symbols with local binding or that have
1101 // internal or hidden visibility.
1102 if (sym.get_st_bind() == elfcpp::STB_LOCAL
1103 || sym.get_st_visibility() == elfcpp::STV_INTERNAL
1104 || sym.get_st_visibility() == elfcpp::STV_HIDDEN)
1107 // A protected symbol in a shared library must be treated as a
1108 // normal symbol when viewed from outside the shared library.
1109 // Implement this by overriding the visibility here.
1110 elfcpp::Sym<size, big_endian>* psym = &sym;
1111 unsigned char symbuf[sym_size];
1112 elfcpp::Sym<size, big_endian> sym2(symbuf);
1113 if (sym.get_st_visibility() == elfcpp::STV_PROTECTED)
1115 memcpy(symbuf, p, sym_size);
1116 elfcpp::Sym_write<size, big_endian> sw(symbuf);
1117 sw.put_st_other(elfcpp::STV_DEFAULT, sym.get_st_nonvis());
1121 unsigned int st_name = psym->get_st_name();
1122 if (st_name >= sym_name_size)
1124 dynobj->error(_("bad symbol name offset %u at %zu"),
1129 const char* name = sym_names + st_name;
1132 unsigned int st_shndx = dynobj->adjust_sym_shndx(i, psym->get_st_shndx(),
1135 if (st_shndx != elfcpp::SHN_UNDEF)
1138 Sized_symbol<size>* res;
1142 Stringpool::Key name_key;
1143 name = this->namepool_.add(name, true, &name_key);
1144 res = this->add_from_object(dynobj, name, name_key, NULL, 0,
1145 false, *psym, st_shndx, is_ordinary,
1150 // Read the version information.
1152 unsigned int v = elfcpp::Swap<16, big_endian>::readval(vs);
1154 bool hidden = (v & elfcpp::VERSYM_HIDDEN) != 0;
1155 v &= elfcpp::VERSYM_VERSION;
1157 // The Sun documentation says that V can be VER_NDX_LOCAL,
1158 // or VER_NDX_GLOBAL, or a version index. The meaning of
1159 // VER_NDX_LOCAL is defined as "Symbol has local scope."
1160 // The old GNU linker will happily generate VER_NDX_LOCAL
1161 // for an undefined symbol. I don't know what the Sun
1162 // linker will generate.
1164 if (v == static_cast<unsigned int>(elfcpp::VER_NDX_LOCAL)
1165 && st_shndx != elfcpp::SHN_UNDEF)
1167 // This symbol should not be visible outside the object.
1171 // At this point we are definitely going to add this symbol.
1172 Stringpool::Key name_key;
1173 name = this->namepool_.add(name, true, &name_key);
1175 if (v == static_cast<unsigned int>(elfcpp::VER_NDX_LOCAL)
1176 || v == static_cast<unsigned int>(elfcpp::VER_NDX_GLOBAL))
1178 // This symbol does not have a version.
1179 res = this->add_from_object(dynobj, name, name_key, NULL, 0,
1180 false, *psym, st_shndx, is_ordinary,
1185 if (v >= version_map->size())
1187 dynobj->error(_("versym for symbol %zu out of range: %u"),
1192 const char* version = (*version_map)[v];
1193 if (version == NULL)
1195 dynobj->error(_("versym for symbol %zu has no name: %u"),
1200 Stringpool::Key version_key;
1201 version = this->namepool_.add(version, true, &version_key);
1203 // If this is an absolute symbol, and the version name
1204 // and symbol name are the same, then this is the
1205 // version definition symbol. These symbols exist to
1206 // support using -u to pull in particular versions. We
1207 // do not want to record a version for them.
1208 if (st_shndx == elfcpp::SHN_ABS
1210 && name_key == version_key)
1211 res = this->add_from_object(dynobj, name, name_key, NULL, 0,
1212 false, *psym, st_shndx, is_ordinary,
1216 const bool def = (!hidden
1217 && st_shndx != elfcpp::SHN_UNDEF);
1218 res = this->add_from_object(dynobj, name, name_key, version,
1219 version_key, def, *psym, st_shndx,
1220 is_ordinary, st_shndx);
1225 // Note that it is possible that RES was overridden by an
1226 // earlier object, in which case it can't be aliased here.
1227 if (st_shndx != elfcpp::SHN_UNDEF
1229 && psym->get_st_type() == elfcpp::STT_OBJECT
1230 && res->source() == Symbol::FROM_OBJECT
1231 && res->object() == dynobj)
1232 object_symbols.push_back(res);
1234 if (sympointers != NULL)
1235 (*sympointers)[i] = res;
1238 this->record_weak_aliases(&object_symbols);
1241 // This is used to sort weak aliases. We sort them first by section
1242 // index, then by offset, then by weak ahead of strong.
1245 class Weak_alias_sorter
1248 bool operator()(const Sized_symbol<size>*, const Sized_symbol<size>*) const;
1253 Weak_alias_sorter<size>::operator()(const Sized_symbol<size>* s1,
1254 const Sized_symbol<size>* s2) const
1257 unsigned int s1_shndx = s1->shndx(&is_ordinary);
1258 gold_assert(is_ordinary);
1259 unsigned int s2_shndx = s2->shndx(&is_ordinary);
1260 gold_assert(is_ordinary);
1261 if (s1_shndx != s2_shndx)
1262 return s1_shndx < s2_shndx;
1264 if (s1->value() != s2->value())
1265 return s1->value() < s2->value();
1266 if (s1->binding() != s2->binding())
1268 if (s1->binding() == elfcpp::STB_WEAK)
1270 if (s2->binding() == elfcpp::STB_WEAK)
1273 return std::string(s1->name()) < std::string(s2->name());
1276 // SYMBOLS is a list of object symbols from a dynamic object. Look
1277 // for any weak aliases, and record them so that if we add the weak
1278 // alias to the dynamic symbol table, we also add the corresponding
1283 Symbol_table::record_weak_aliases(std::vector<Sized_symbol<size>*>* symbols)
1285 // Sort the vector by section index, then by offset, then by weak
1287 std::sort(symbols->begin(), symbols->end(), Weak_alias_sorter<size>());
1289 // Walk through the vector. For each weak definition, record
1291 for (typename std::vector<Sized_symbol<size>*>::const_iterator p =
1293 p != symbols->end();
1296 if ((*p)->binding() != elfcpp::STB_WEAK)
1299 // Build a circular list of weak aliases. Each symbol points to
1300 // the next one in the circular list.
1302 Sized_symbol<size>* from_sym = *p;
1303 typename std::vector<Sized_symbol<size>*>::const_iterator q;
1304 for (q = p + 1; q != symbols->end(); ++q)
1307 if ((*q)->shndx(&dummy) != from_sym->shndx(&dummy)
1308 || (*q)->value() != from_sym->value())
1311 this->weak_aliases_[from_sym] = *q;
1312 from_sym->set_has_alias();
1318 this->weak_aliases_[from_sym] = *p;
1319 from_sym->set_has_alias();
1326 // Create and return a specially defined symbol. If ONLY_IF_REF is
1327 // true, then only create the symbol if there is a reference to it.
1328 // If this does not return NULL, it sets *POLDSYM to the existing
1329 // symbol if there is one. This canonicalizes *PNAME and *PVERSION.
1331 template<int size, bool big_endian>
1333 Symbol_table::define_special_symbol(const char** pname, const char** pversion,
1335 Sized_symbol<size>** poldsym)
1338 Sized_symbol<size>* sym;
1339 bool add_to_table = false;
1340 typename Symbol_table_type::iterator add_loc = this->table_.end();
1342 // If the caller didn't give us a version, see if we get one from
1343 // the version script.
1345 if (*pversion == NULL)
1347 if (this->version_script_.get_symbol_version(*pname, &v))
1350 *pversion = v.c_str();
1356 oldsym = this->lookup(*pname, *pversion);
1357 if (oldsym == NULL || !oldsym->is_undefined())
1360 *pname = oldsym->name();
1361 *pversion = oldsym->version();
1365 // Canonicalize NAME and VERSION.
1366 Stringpool::Key name_key;
1367 *pname = this->namepool_.add(*pname, true, &name_key);
1369 Stringpool::Key version_key = 0;
1370 if (*pversion != NULL)
1371 *pversion = this->namepool_.add(*pversion, true, &version_key);
1373 Symbol* const snull = NULL;
1374 std::pair<typename Symbol_table_type::iterator, bool> ins =
1375 this->table_.insert(std::make_pair(std::make_pair(name_key,
1381 // We already have a symbol table entry for NAME/VERSION.
1382 oldsym = ins.first->second;
1383 gold_assert(oldsym != NULL);
1387 // We haven't seen this symbol before.
1388 gold_assert(ins.first->second == NULL);
1389 add_to_table = true;
1390 add_loc = ins.first;
1395 const Target& target = parameters->target();
1396 if (!target.has_make_symbol())
1397 sym = new Sized_symbol<size>();
1400 gold_assert(target.get_size() == size);
1401 gold_assert(target.is_big_endian() ? big_endian : !big_endian);
1402 typedef Sized_target<size, big_endian> My_target;
1403 const My_target* sized_target =
1404 static_cast<const My_target*>(&target);
1405 sym = sized_target->make_symbol();
1411 add_loc->second = sym;
1413 gold_assert(oldsym != NULL);
1415 *poldsym = this->get_sized_symbol<size>(oldsym);
1420 // Define a symbol based on an Output_data.
1423 Symbol_table::define_in_output_data(const char* name,
1424 const char* version,
1429 elfcpp::STB binding,
1430 elfcpp::STV visibility,
1431 unsigned char nonvis,
1432 bool offset_is_from_end,
1435 if (parameters->target().get_size() == 32)
1437 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
1438 return this->do_define_in_output_data<32>(name, version, od,
1439 value, symsize, type, binding,
1447 else if (parameters->target().get_size() == 64)
1449 #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
1450 return this->do_define_in_output_data<64>(name, version, od,
1451 value, symsize, type, binding,
1463 // Define a symbol in an Output_data, sized version.
1467 Symbol_table::do_define_in_output_data(
1469 const char* version,
1471 typename elfcpp::Elf_types<size>::Elf_Addr value,
1472 typename elfcpp::Elf_types<size>::Elf_WXword symsize,
1474 elfcpp::STB binding,
1475 elfcpp::STV visibility,
1476 unsigned char nonvis,
1477 bool offset_is_from_end,
1480 Sized_symbol<size>* sym;
1481 Sized_symbol<size>* oldsym;
1483 if (parameters->target().is_big_endian())
1485 #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG)
1486 sym = this->define_special_symbol<size, true>(&name, &version,
1487 only_if_ref, &oldsym);
1494 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE)
1495 sym = this->define_special_symbol<size, false>(&name, &version,
1496 only_if_ref, &oldsym);
1505 sym->init_output_data(name, version, od, value, symsize, type, binding,
1506 visibility, nonvis, offset_is_from_end);
1510 if (binding == elfcpp::STB_LOCAL
1511 || this->version_script_.symbol_is_local(name))
1512 this->force_local(sym);
1513 else if (version != NULL)
1514 sym->set_is_default();
1518 if (Symbol_table::should_override_with_special(oldsym))
1519 this->override_with_special(oldsym, sym);
1524 // Define a symbol based on an Output_segment.
1527 Symbol_table::define_in_output_segment(const char* name,
1528 const char* version, Output_segment* os,
1532 elfcpp::STB binding,
1533 elfcpp::STV visibility,
1534 unsigned char nonvis,
1535 Symbol::Segment_offset_base offset_base,
1538 if (parameters->target().get_size() == 32)
1540 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
1541 return this->do_define_in_output_segment<32>(name, version, os,
1542 value, symsize, type,
1543 binding, visibility, nonvis,
1544 offset_base, only_if_ref);
1549 else if (parameters->target().get_size() == 64)
1551 #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
1552 return this->do_define_in_output_segment<64>(name, version, os,
1553 value, symsize, type,
1554 binding, visibility, nonvis,
1555 offset_base, only_if_ref);
1564 // Define a symbol in an Output_segment, sized version.
1568 Symbol_table::do_define_in_output_segment(
1570 const char* version,
1572 typename elfcpp::Elf_types<size>::Elf_Addr value,
1573 typename elfcpp::Elf_types<size>::Elf_WXword symsize,
1575 elfcpp::STB binding,
1576 elfcpp::STV visibility,
1577 unsigned char nonvis,
1578 Symbol::Segment_offset_base offset_base,
1581 Sized_symbol<size>* sym;
1582 Sized_symbol<size>* oldsym;
1584 if (parameters->target().is_big_endian())
1586 #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG)
1587 sym = this->define_special_symbol<size, true>(&name, &version,
1588 only_if_ref, &oldsym);
1595 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE)
1596 sym = this->define_special_symbol<size, false>(&name, &version,
1597 only_if_ref, &oldsym);
1606 sym->init_output_segment(name, version, os, value, symsize, type, binding,
1607 visibility, nonvis, offset_base);
1611 if (binding == elfcpp::STB_LOCAL
1612 || this->version_script_.symbol_is_local(name))
1613 this->force_local(sym);
1614 else if (version != NULL)
1615 sym->set_is_default();
1619 if (Symbol_table::should_override_with_special(oldsym))
1620 this->override_with_special(oldsym, sym);
1625 // Define a special symbol with a constant value. It is a multiple
1626 // definition error if this symbol is already defined.
1629 Symbol_table::define_as_constant(const char* name,
1630 const char* version,
1634 elfcpp::STB binding,
1635 elfcpp::STV visibility,
1636 unsigned char nonvis,
1638 bool force_override)
1640 if (parameters->target().get_size() == 32)
1642 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
1643 return this->do_define_as_constant<32>(name, version, value,
1644 symsize, type, binding,
1645 visibility, nonvis, only_if_ref,
1651 else if (parameters->target().get_size() == 64)
1653 #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
1654 return this->do_define_as_constant<64>(name, version, value,
1655 symsize, type, binding,
1656 visibility, nonvis, only_if_ref,
1666 // Define a symbol as a constant, sized version.
1670 Symbol_table::do_define_as_constant(
1672 const char* version,
1673 typename elfcpp::Elf_types<size>::Elf_Addr value,
1674 typename elfcpp::Elf_types<size>::Elf_WXword symsize,
1676 elfcpp::STB binding,
1677 elfcpp::STV visibility,
1678 unsigned char nonvis,
1680 bool force_override)
1682 Sized_symbol<size>* sym;
1683 Sized_symbol<size>* oldsym;
1685 if (parameters->target().is_big_endian())
1687 #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG)
1688 sym = this->define_special_symbol<size, true>(&name, &version,
1689 only_if_ref, &oldsym);
1696 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE)
1697 sym = this->define_special_symbol<size, false>(&name, &version,
1698 only_if_ref, &oldsym);
1707 sym->init_constant(name, version, value, symsize, type, binding, visibility,
1712 // Version symbols are absolute symbols with name == version.
1713 // We don't want to force them to be local.
1714 if ((version == NULL
1717 && (binding == elfcpp::STB_LOCAL
1718 || this->version_script_.symbol_is_local(name)))
1719 this->force_local(sym);
1720 else if (version != NULL
1721 && (name != version || value != 0))
1722 sym->set_is_default();
1726 if (force_override || Symbol_table::should_override_with_special(oldsym))
1727 this->override_with_special(oldsym, sym);
1732 // Define a set of symbols in output sections.
1735 Symbol_table::define_symbols(const Layout* layout, int count,
1736 const Define_symbol_in_section* p,
1739 for (int i = 0; i < count; ++i, ++p)
1741 Output_section* os = layout->find_output_section(p->output_section);
1743 this->define_in_output_data(p->name, NULL, os, p->value,
1744 p->size, p->type, p->binding,
1745 p->visibility, p->nonvis,
1746 p->offset_is_from_end,
1747 only_if_ref || p->only_if_ref);
1749 this->define_as_constant(p->name, NULL, 0, p->size, p->type,
1750 p->binding, p->visibility, p->nonvis,
1751 only_if_ref || p->only_if_ref,
1756 // Define a set of symbols in output segments.
1759 Symbol_table::define_symbols(const Layout* layout, int count,
1760 const Define_symbol_in_segment* p,
1763 for (int i = 0; i < count; ++i, ++p)
1765 Output_segment* os = layout->find_output_segment(p->segment_type,
1766 p->segment_flags_set,
1767 p->segment_flags_clear);
1769 this->define_in_output_segment(p->name, NULL, os, p->value,
1770 p->size, p->type, p->binding,
1771 p->visibility, p->nonvis,
1773 only_if_ref || p->only_if_ref);
1775 this->define_as_constant(p->name, NULL, 0, p->size, p->type,
1776 p->binding, p->visibility, p->nonvis,
1777 only_if_ref || p->only_if_ref,
1782 // Define CSYM using a COPY reloc. POSD is the Output_data where the
1783 // symbol should be defined--typically a .dyn.bss section. VALUE is
1784 // the offset within POSD.
1788 Symbol_table::define_with_copy_reloc(
1789 Sized_symbol<size>* csym,
1791 typename elfcpp::Elf_types<size>::Elf_Addr value)
1793 gold_assert(csym->is_from_dynobj());
1794 gold_assert(!csym->is_copied_from_dynobj());
1795 Object* object = csym->object();
1796 gold_assert(object->is_dynamic());
1797 Dynobj* dynobj = static_cast<Dynobj*>(object);
1799 // Our copied variable has to override any variable in a shared
1801 elfcpp::STB binding = csym->binding();
1802 if (binding == elfcpp::STB_WEAK)
1803 binding = elfcpp::STB_GLOBAL;
1805 this->define_in_output_data(csym->name(), csym->version(),
1806 posd, value, csym->symsize(),
1807 csym->type(), binding,
1808 csym->visibility(), csym->nonvis(),
1811 csym->set_is_copied_from_dynobj();
1812 csym->set_needs_dynsym_entry();
1814 this->copied_symbol_dynobjs_[csym] = dynobj;
1816 // We have now defined all aliases, but we have not entered them all
1817 // in the copied_symbol_dynobjs_ map.
1818 if (csym->has_alias())
1823 sym = this->weak_aliases_[sym];
1826 gold_assert(sym->output_data() == posd);
1828 sym->set_is_copied_from_dynobj();
1829 this->copied_symbol_dynobjs_[sym] = dynobj;
1834 // SYM is defined using a COPY reloc. Return the dynamic object where
1835 // the original definition was found.
1838 Symbol_table::get_copy_source(const Symbol* sym) const
1840 gold_assert(sym->is_copied_from_dynobj());
1841 Copied_symbol_dynobjs::const_iterator p =
1842 this->copied_symbol_dynobjs_.find(sym);
1843 gold_assert(p != this->copied_symbol_dynobjs_.end());
1847 // Add any undefined symbols named on the command line.
1850 Symbol_table::add_undefined_symbols_from_command_line()
1852 if (parameters->options().any_undefined())
1854 if (parameters->target().get_size() == 32)
1856 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
1857 this->do_add_undefined_symbols_from_command_line<32>();
1862 else if (parameters->target().get_size() == 64)
1864 #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
1865 this->do_add_undefined_symbols_from_command_line<64>();
1877 Symbol_table::do_add_undefined_symbols_from_command_line()
1879 for (options::String_set::const_iterator p =
1880 parameters->options().undefined_begin();
1881 p != parameters->options().undefined_end();
1884 const char* name = p->c_str();
1886 if (this->lookup(name) != NULL)
1889 const char* version = NULL;
1891 Sized_symbol<size>* sym;
1892 Sized_symbol<size>* oldsym;
1893 if (parameters->target().is_big_endian())
1895 #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG)
1896 sym = this->define_special_symbol<size, true>(&name, &version,
1904 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE)
1905 sym = this->define_special_symbol<size, false>(&name, &version,
1912 gold_assert(oldsym == NULL);
1914 sym->init_undefined(name, version, elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
1915 elfcpp::STV_DEFAULT, 0);
1916 ++this->saw_undefined_;
1920 // Set the dynamic symbol indexes. INDEX is the index of the first
1921 // global dynamic symbol. Pointers to the symbols are stored into the
1922 // vector SYMS. The names are added to DYNPOOL. This returns an
1923 // updated dynamic symbol index.
1926 Symbol_table::set_dynsym_indexes(unsigned int index,
1927 std::vector<Symbol*>* syms,
1928 Stringpool* dynpool,
1931 for (Symbol_table_type::iterator p = this->table_.begin();
1932 p != this->table_.end();
1935 Symbol* sym = p->second;
1937 // Note that SYM may already have a dynamic symbol index, since
1938 // some symbols appear more than once in the symbol table, with
1939 // and without a version.
1941 if (!sym->should_add_dynsym_entry())
1942 sym->set_dynsym_index(-1U);
1943 else if (!sym->has_dynsym_index())
1945 sym->set_dynsym_index(index);
1947 syms->push_back(sym);
1948 dynpool->add(sym->name(), false, NULL);
1950 // Record any version information.
1951 if (sym->version() != NULL)
1952 versions->record_version(this, dynpool, sym);
1956 // Finish up the versions. In some cases this may add new dynamic
1958 index = versions->finalize(this, index, syms);
1963 // Set the final values for all the symbols. The index of the first
1964 // global symbol in the output file is *PLOCAL_SYMCOUNT. Record the
1965 // file offset OFF. Add their names to POOL. Return the new file
1966 // offset. Update *PLOCAL_SYMCOUNT if necessary.
1969 Symbol_table::finalize(off_t off, off_t dynoff, size_t dyn_global_index,
1970 size_t dyncount, Stringpool* pool,
1971 unsigned int *plocal_symcount)
1975 gold_assert(*plocal_symcount != 0);
1976 this->first_global_index_ = *plocal_symcount;
1978 this->dynamic_offset_ = dynoff;
1979 this->first_dynamic_global_index_ = dyn_global_index;
1980 this->dynamic_count_ = dyncount;
1982 if (parameters->target().get_size() == 32)
1984 #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_32_LITTLE)
1985 ret = this->sized_finalize<32>(off, pool, plocal_symcount);
1990 else if (parameters->target().get_size() == 64)
1992 #if defined(HAVE_TARGET_64_BIG) || defined(HAVE_TARGET_64_LITTLE)
1993 ret = this->sized_finalize<64>(off, pool, plocal_symcount);
2001 // Now that we have the final symbol table, we can reliably note
2002 // which symbols should get warnings.
2003 this->warnings_.note_warnings(this);
2008 // SYM is going into the symbol table at *PINDEX. Add the name to
2009 // POOL, update *PINDEX and *POFF.
2013 Symbol_table::add_to_final_symtab(Symbol* sym, Stringpool* pool,
2014 unsigned int* pindex, off_t* poff)
2016 sym->set_symtab_index(*pindex);
2017 pool->add(sym->name(), false, NULL);
2019 *poff += elfcpp::Elf_sizes<size>::sym_size;
2022 // Set the final value for all the symbols. This is called after
2023 // Layout::finalize, so all the output sections have their final
2028 Symbol_table::sized_finalize(off_t off, Stringpool* pool,
2029 unsigned int* plocal_symcount)
2031 off = align_address(off, size >> 3);
2032 this->offset_ = off;
2034 unsigned int index = *plocal_symcount;
2035 const unsigned int orig_index = index;
2037 // First do all the symbols which have been forced to be local, as
2038 // they must appear before all global symbols.
2039 for (Forced_locals::iterator p = this->forced_locals_.begin();
2040 p != this->forced_locals_.end();
2044 gold_assert(sym->is_forced_local());
2045 if (this->sized_finalize_symbol<size>(sym))
2047 this->add_to_final_symtab<size>(sym, pool, &index, &off);
2052 // Now do all the remaining symbols.
2053 for (Symbol_table_type::iterator p = this->table_.begin();
2054 p != this->table_.end();
2057 Symbol* sym = p->second;
2058 if (this->sized_finalize_symbol<size>(sym))
2059 this->add_to_final_symtab<size>(sym, pool, &index, &off);
2062 this->output_count_ = index - orig_index;
2067 // Finalize the symbol SYM. This returns true if the symbol should be
2068 // added to the symbol table, false otherwise.
2072 Symbol_table::sized_finalize_symbol(Symbol* unsized_sym)
2074 typedef typename Sized_symbol<size>::Value_type Value_type;
2076 Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(unsized_sym);
2078 // The default version of a symbol may appear twice in the symbol
2079 // table. We only need to finalize it once.
2080 if (sym->has_symtab_index())
2085 gold_assert(!sym->has_symtab_index());
2086 sym->set_symtab_index(-1U);
2087 gold_assert(sym->dynsym_index() == -1U);
2093 switch (sym->source())
2095 case Symbol::FROM_OBJECT:
2098 unsigned int shndx = sym->shndx(&is_ordinary);
2100 // FIXME: We need some target specific support here.
2102 && shndx != elfcpp::SHN_ABS
2103 && shndx != elfcpp::SHN_COMMON)
2105 gold_error(_("%s: unsupported symbol section 0x%x"),
2106 sym->demangled_name().c_str(), shndx);
2107 shndx = elfcpp::SHN_UNDEF;
2110 Object* symobj = sym->object();
2111 if (symobj->is_dynamic())
2114 shndx = elfcpp::SHN_UNDEF;
2116 else if (symobj->pluginobj() != NULL)
2119 shndx = elfcpp::SHN_UNDEF;
2121 else if (shndx == elfcpp::SHN_UNDEF)
2123 else if (!is_ordinary
2124 && (shndx == elfcpp::SHN_ABS || shndx == elfcpp::SHN_COMMON))
2125 value = sym->value();
2128 Relobj* relobj = static_cast<Relobj*>(symobj);
2129 Output_section* os = relobj->output_section(shndx);
2133 sym->set_symtab_index(-1U);
2134 gold_assert(sym->dynsym_index() == -1U);
2138 uint64_t secoff64 = relobj->output_section_offset(shndx);
2139 Value_type secoff = convert_types<Value_type, uint64_t>(secoff64);
2140 if (sym->type() == elfcpp::STT_TLS)
2141 value = sym->value() + os->tls_offset() + secoff;
2143 value = sym->value() + os->address() + secoff;
2148 case Symbol::IN_OUTPUT_DATA:
2150 Output_data* od = sym->output_data();
2151 value = sym->value();
2152 if (sym->type() != elfcpp::STT_TLS)
2153 value += od->address();
2156 Output_section* os = od->output_section();
2157 gold_assert(os != NULL);
2158 value += os->tls_offset() + (od->address() - os->address());
2160 if (sym->offset_is_from_end())
2161 value += od->data_size();
2165 case Symbol::IN_OUTPUT_SEGMENT:
2167 Output_segment* os = sym->output_segment();
2168 value = sym->value();
2169 if (sym->type() != elfcpp::STT_TLS)
2170 value += os->vaddr();
2171 switch (sym->offset_base())
2173 case Symbol::SEGMENT_START:
2175 case Symbol::SEGMENT_END:
2176 value += os->memsz();
2178 case Symbol::SEGMENT_BSS:
2179 value += os->filesz();
2187 case Symbol::IS_CONSTANT:
2188 value = sym->value();
2191 case Symbol::IS_UNDEFINED:
2199 sym->set_value(value);
2201 if (parameters->options().strip_all())
2203 sym->set_symtab_index(-1U);
2210 // Write out the global symbols.
2213 Symbol_table::write_globals(const Input_objects* input_objects,
2214 const Stringpool* sympool,
2215 const Stringpool* dynpool,
2216 Output_symtab_xindex* symtab_xindex,
2217 Output_symtab_xindex* dynsym_xindex,
2218 Output_file* of) const
2220 switch (parameters->size_and_endianness())
2222 #ifdef HAVE_TARGET_32_LITTLE
2223 case Parameters::TARGET_32_LITTLE:
2224 this->sized_write_globals<32, false>(input_objects, sympool,
2225 dynpool, symtab_xindex,
2229 #ifdef HAVE_TARGET_32_BIG
2230 case Parameters::TARGET_32_BIG:
2231 this->sized_write_globals<32, true>(input_objects, sympool,
2232 dynpool, symtab_xindex,
2236 #ifdef HAVE_TARGET_64_LITTLE
2237 case Parameters::TARGET_64_LITTLE:
2238 this->sized_write_globals<64, false>(input_objects, sympool,
2239 dynpool, symtab_xindex,
2243 #ifdef HAVE_TARGET_64_BIG
2244 case Parameters::TARGET_64_BIG:
2245 this->sized_write_globals<64, true>(input_objects, sympool,
2246 dynpool, symtab_xindex,
2255 // Write out the global symbols.
2257 template<int size, bool big_endian>
2259 Symbol_table::sized_write_globals(const Input_objects* input_objects,
2260 const Stringpool* sympool,
2261 const Stringpool* dynpool,
2262 Output_symtab_xindex* symtab_xindex,
2263 Output_symtab_xindex* dynsym_xindex,
2264 Output_file* of) const
2266 const Target& target = parameters->target();
2268 const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
2270 const unsigned int output_count = this->output_count_;
2271 const section_size_type oview_size = output_count * sym_size;
2272 const unsigned int first_global_index = this->first_global_index_;
2273 unsigned char* psyms;
2274 if (this->offset_ == 0 || output_count == 0)
2277 psyms = of->get_output_view(this->offset_, oview_size);
2279 const unsigned int dynamic_count = this->dynamic_count_;
2280 const section_size_type dynamic_size = dynamic_count * sym_size;
2281 const unsigned int first_dynamic_global_index =
2282 this->first_dynamic_global_index_;
2283 unsigned char* dynamic_view;
2284 if (this->dynamic_offset_ == 0 || dynamic_count == 0)
2285 dynamic_view = NULL;
2287 dynamic_view = of->get_output_view(this->dynamic_offset_, dynamic_size);
2289 for (Symbol_table_type::const_iterator p = this->table_.begin();
2290 p != this->table_.end();
2293 Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(p->second);
2295 // Possibly warn about unresolved symbols in shared libraries.
2296 this->warn_about_undefined_dynobj_symbol(input_objects, sym);
2298 unsigned int sym_index = sym->symtab_index();
2299 unsigned int dynsym_index;
2300 if (dynamic_view == NULL)
2303 dynsym_index = sym->dynsym_index();
2305 if (sym_index == -1U && dynsym_index == -1U)
2307 // This symbol is not included in the output file.
2312 typename elfcpp::Elf_types<size>::Elf_Addr sym_value = sym->value();
2313 typename elfcpp::Elf_types<size>::Elf_Addr dynsym_value = sym_value;
2314 switch (sym->source())
2316 case Symbol::FROM_OBJECT:
2319 unsigned int in_shndx = sym->shndx(&is_ordinary);
2321 // FIXME: We need some target specific support here.
2323 && in_shndx != elfcpp::SHN_ABS
2324 && in_shndx != elfcpp::SHN_COMMON)
2326 gold_error(_("%s: unsupported symbol section 0x%x"),
2327 sym->demangled_name().c_str(), in_shndx);
2332 Object* symobj = sym->object();
2333 if (symobj->is_dynamic())
2335 if (sym->needs_dynsym_value())
2336 dynsym_value = target.dynsym_value(sym);
2337 shndx = elfcpp::SHN_UNDEF;
2339 else if (symobj->pluginobj() != NULL)
2340 shndx = elfcpp::SHN_UNDEF;
2341 else if (in_shndx == elfcpp::SHN_UNDEF
2343 && (in_shndx == elfcpp::SHN_ABS
2344 || in_shndx == elfcpp::SHN_COMMON)))
2348 Relobj* relobj = static_cast<Relobj*>(symobj);
2349 Output_section* os = relobj->output_section(in_shndx);
2350 gold_assert(os != NULL);
2351 shndx = os->out_shndx();
2353 if (shndx >= elfcpp::SHN_LORESERVE)
2355 if (sym_index != -1U)
2356 symtab_xindex->add(sym_index, shndx);
2357 if (dynsym_index != -1U)
2358 dynsym_xindex->add(dynsym_index, shndx);
2359 shndx = elfcpp::SHN_XINDEX;
2362 // In object files symbol values are section
2364 if (parameters->options().relocatable())
2365 sym_value -= os->address();
2371 case Symbol::IN_OUTPUT_DATA:
2372 shndx = sym->output_data()->out_shndx();
2373 if (shndx >= elfcpp::SHN_LORESERVE)
2375 if (sym_index != -1U)
2376 symtab_xindex->add(sym_index, shndx);
2377 if (dynsym_index != -1U)
2378 dynsym_xindex->add(dynsym_index, shndx);
2379 shndx = elfcpp::SHN_XINDEX;
2383 case Symbol::IN_OUTPUT_SEGMENT:
2384 shndx = elfcpp::SHN_ABS;
2387 case Symbol::IS_CONSTANT:
2388 shndx = elfcpp::SHN_ABS;
2391 case Symbol::IS_UNDEFINED:
2392 shndx = elfcpp::SHN_UNDEF;
2399 if (sym_index != -1U)
2401 sym_index -= first_global_index;
2402 gold_assert(sym_index < output_count);
2403 unsigned char* ps = psyms + (sym_index * sym_size);
2404 this->sized_write_symbol<size, big_endian>(sym, sym_value, shndx,
2408 if (dynsym_index != -1U)
2410 dynsym_index -= first_dynamic_global_index;
2411 gold_assert(dynsym_index < dynamic_count);
2412 unsigned char* pd = dynamic_view + (dynsym_index * sym_size);
2413 this->sized_write_symbol<size, big_endian>(sym, dynsym_value, shndx,
2418 of->write_output_view(this->offset_, oview_size, psyms);
2419 if (dynamic_view != NULL)
2420 of->write_output_view(this->dynamic_offset_, dynamic_size, dynamic_view);
2423 // Write out the symbol SYM, in section SHNDX, to P. POOL is the
2424 // strtab holding the name.
2426 template<int size, bool big_endian>
2428 Symbol_table::sized_write_symbol(
2429 Sized_symbol<size>* sym,
2430 typename elfcpp::Elf_types<size>::Elf_Addr value,
2432 const Stringpool* pool,
2433 unsigned char* p) const
2435 elfcpp::Sym_write<size, big_endian> osym(p);
2436 osym.put_st_name(pool->get_offset(sym->name()));
2437 osym.put_st_value(value);
2438 // Use a symbol size of zero for undefined symbols from shared libraries.
2439 if (shndx == elfcpp::SHN_UNDEF && sym->is_from_dynobj())
2440 osym.put_st_size(0);
2442 osym.put_st_size(sym->symsize());
2443 // A version script may have overridden the default binding.
2444 if (sym->is_forced_local())
2445 osym.put_st_info(elfcpp::elf_st_info(elfcpp::STB_LOCAL, sym->type()));
2447 osym.put_st_info(elfcpp::elf_st_info(sym->binding(), sym->type()));
2448 osym.put_st_other(elfcpp::elf_st_other(sym->visibility(), sym->nonvis()));
2449 osym.put_st_shndx(shndx);
2452 // Check for unresolved symbols in shared libraries. This is
2453 // controlled by the --allow-shlib-undefined option.
2455 // We only warn about libraries for which we have seen all the
2456 // DT_NEEDED entries. We don't try to track down DT_NEEDED entries
2457 // which were not seen in this link. If we didn't see a DT_NEEDED
2458 // entry, we aren't going to be able to reliably report whether the
2459 // symbol is undefined.
2461 // We also don't warn about libraries found in the system library
2462 // directory (the directory were we find libc.so); we assume that
2463 // those libraries are OK. This heuristic avoids problems in
2464 // GNU/Linux, in which -ldl can have undefined references satisfied by
2468 Symbol_table::warn_about_undefined_dynobj_symbol(
2469 const Input_objects* input_objects,
2473 if (sym->source() == Symbol::FROM_OBJECT
2474 && sym->object()->is_dynamic()
2475 && sym->shndx(&dummy) == elfcpp::SHN_UNDEF
2476 && sym->binding() != elfcpp::STB_WEAK
2477 && !parameters->options().allow_shlib_undefined()
2478 && !parameters->target().is_defined_by_abi(sym)
2479 && !input_objects->found_in_system_library_directory(sym->object()))
2481 // A very ugly cast.
2482 Dynobj* dynobj = static_cast<Dynobj*>(sym->object());
2483 if (!dynobj->has_unknown_needed_entries())
2486 gold_error(_("%s: undefined reference to '%s', version '%s'"),
2487 sym->object()->name().c_str(),
2488 sym->demangled_name().c_str(),
2491 gold_error(_("%s: undefined reference to '%s'"),
2492 sym->object()->name().c_str(),
2493 sym->demangled_name().c_str());
2498 // Write out a section symbol. Return the update offset.
2501 Symbol_table::write_section_symbol(const Output_section *os,
2502 Output_symtab_xindex* symtab_xindex,
2506 switch (parameters->size_and_endianness())
2508 #ifdef HAVE_TARGET_32_LITTLE
2509 case Parameters::TARGET_32_LITTLE:
2510 this->sized_write_section_symbol<32, false>(os, symtab_xindex, of,
2514 #ifdef HAVE_TARGET_32_BIG
2515 case Parameters::TARGET_32_BIG:
2516 this->sized_write_section_symbol<32, true>(os, symtab_xindex, of,
2520 #ifdef HAVE_TARGET_64_LITTLE
2521 case Parameters::TARGET_64_LITTLE:
2522 this->sized_write_section_symbol<64, false>(os, symtab_xindex, of,
2526 #ifdef HAVE_TARGET_64_BIG
2527 case Parameters::TARGET_64_BIG:
2528 this->sized_write_section_symbol<64, true>(os, symtab_xindex, of,
2537 // Write out a section symbol, specialized for size and endianness.
2539 template<int size, bool big_endian>
2541 Symbol_table::sized_write_section_symbol(const Output_section* os,
2542 Output_symtab_xindex* symtab_xindex,
2546 const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
2548 unsigned char* pov = of->get_output_view(offset, sym_size);
2550 elfcpp::Sym_write<size, big_endian> osym(pov);
2551 osym.put_st_name(0);
2552 osym.put_st_value(os->address());
2553 osym.put_st_size(0);
2554 osym.put_st_info(elfcpp::elf_st_info(elfcpp::STB_LOCAL,
2555 elfcpp::STT_SECTION));
2556 osym.put_st_other(elfcpp::elf_st_other(elfcpp::STV_DEFAULT, 0));
2558 unsigned int shndx = os->out_shndx();
2559 if (shndx >= elfcpp::SHN_LORESERVE)
2561 symtab_xindex->add(os->symtab_index(), shndx);
2562 shndx = elfcpp::SHN_XINDEX;
2564 osym.put_st_shndx(shndx);
2566 of->write_output_view(offset, sym_size, pov);
2569 // Print statistical information to stderr. This is used for --stats.
2572 Symbol_table::print_stats() const
2574 #if defined(HAVE_TR1_UNORDERED_MAP) || defined(HAVE_EXT_HASH_MAP)
2575 fprintf(stderr, _("%s: symbol table entries: %zu; buckets: %zu\n"),
2576 program_name, this->table_.size(), this->table_.bucket_count());
2578 fprintf(stderr, _("%s: symbol table entries: %zu\n"),
2579 program_name, this->table_.size());
2581 this->namepool_.print_stats("symbol table stringpool");
2584 // We check for ODR violations by looking for symbols with the same
2585 // name for which the debugging information reports that they were
2586 // defined in different source locations. When comparing the source
2587 // location, we consider instances with the same base filename and
2588 // line number to be the same. This is because different object
2589 // files/shared libraries can include the same header file using
2590 // different paths, and we don't want to report an ODR violation in
2593 // This struct is used to compare line information, as returned by
2594 // Dwarf_line_info::one_addr2line. It implements a < comparison
2595 // operator used with std::set.
2597 struct Odr_violation_compare
2600 operator()(const std::string& s1, const std::string& s2) const
2602 std::string::size_type pos1 = s1.rfind('/');
2603 std::string::size_type pos2 = s2.rfind('/');
2604 if (pos1 == std::string::npos
2605 || pos2 == std::string::npos)
2607 return s1.compare(pos1, std::string::npos,
2608 s2, pos2, std::string::npos) < 0;
2612 // Check candidate_odr_violations_ to find symbols with the same name
2613 // but apparently different definitions (different source-file/line-no).
2616 Symbol_table::detect_odr_violations(const Task* task,
2617 const char* output_file_name) const
2619 for (Odr_map::const_iterator it = candidate_odr_violations_.begin();
2620 it != candidate_odr_violations_.end();
2623 const char* symbol_name = it->first;
2624 // We use a sorted set so the output is deterministic.
2625 std::set<std::string, Odr_violation_compare> line_nums;
2627 for (Unordered_set<Symbol_location, Symbol_location_hash>::const_iterator
2628 locs = it->second.begin();
2629 locs != it->second.end();
2632 // We need to lock the object in order to read it. This
2633 // means that we have to run in a singleton Task. If we
2634 // want to run this in a general Task for better
2635 // performance, we will need one Task for object, plus
2636 // appropriate locking to ensure that we don't conflict with
2637 // other uses of the object. Also note, one_addr2line is not
2638 // currently thread-safe.
2639 Task_lock_obj<Object> tl(task, locs->object);
2640 // 16 is the size of the object-cache that one_addr2line should use.
2641 std::string lineno = Dwarf_line_info::one_addr2line(
2642 locs->object, locs->shndx, locs->offset, 16);
2643 if (!lineno.empty())
2644 line_nums.insert(lineno);
2647 if (line_nums.size() > 1)
2649 gold_warning(_("while linking %s: symbol '%s' defined in multiple "
2650 "places (possible ODR violation):"),
2651 output_file_name, demangle(symbol_name).c_str());
2652 for (std::set<std::string>::const_iterator it2 = line_nums.begin();
2653 it2 != line_nums.end();
2655 fprintf(stderr, " %s\n", it2->c_str());
2658 // We only call one_addr2line() in this function, so we can clear its cache.
2659 Dwarf_line_info::clear_addr2line_cache();
2662 // Warnings functions.
2664 // Add a new warning.
2667 Warnings::add_warning(Symbol_table* symtab, const char* name, Object* obj,
2668 const std::string& warning)
2670 name = symtab->canonicalize_name(name);
2671 this->warnings_[name].set(obj, warning);
2674 // Look through the warnings and mark the symbols for which we should
2675 // warn. This is called during Layout::finalize when we know the
2676 // sources for all the symbols.
2679 Warnings::note_warnings(Symbol_table* symtab)
2681 for (Warning_table::iterator p = this->warnings_.begin();
2682 p != this->warnings_.end();
2685 Symbol* sym = symtab->lookup(p->first, NULL);
2687 && sym->source() == Symbol::FROM_OBJECT
2688 && sym->object() == p->second.object)
2689 sym->set_has_warning();
2693 // Issue a warning. This is called when we see a relocation against a
2694 // symbol for which has a warning.
2696 template<int size, bool big_endian>
2698 Warnings::issue_warning(const Symbol* sym,
2699 const Relocate_info<size, big_endian>* relinfo,
2700 size_t relnum, off_t reloffset) const
2702 gold_assert(sym->has_warning());
2703 Warning_table::const_iterator p = this->warnings_.find(sym->name());
2704 gold_assert(p != this->warnings_.end());
2705 gold_warning_at_location(relinfo, relnum, reloffset,
2706 "%s", p->second.text.c_str());
2709 // Instantiate the templates we need. We could use the configure
2710 // script to restrict this to only the ones needed for implemented
2713 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
2716 Sized_symbol<32>::allocate_common(Output_data*, Value_type);
2719 #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
2722 Sized_symbol<64>::allocate_common(Output_data*, Value_type);
2725 #ifdef HAVE_TARGET_32_LITTLE
2728 Symbol_table::add_from_relobj<32, false>(
2729 Sized_relobj<32, false>* relobj,
2730 const unsigned char* syms,
2732 size_t symndx_offset,
2733 const char* sym_names,
2734 size_t sym_name_size,
2735 Sized_relobj<32, false>::Symbols* sympointers,
2739 #ifdef HAVE_TARGET_32_BIG
2742 Symbol_table::add_from_relobj<32, true>(
2743 Sized_relobj<32, true>* relobj,
2744 const unsigned char* syms,
2746 size_t symndx_offset,
2747 const char* sym_names,
2748 size_t sym_name_size,
2749 Sized_relobj<32, true>::Symbols* sympointers,
2753 #ifdef HAVE_TARGET_64_LITTLE
2756 Symbol_table::add_from_relobj<64, false>(
2757 Sized_relobj<64, false>* relobj,
2758 const unsigned char* syms,
2760 size_t symndx_offset,
2761 const char* sym_names,
2762 size_t sym_name_size,
2763 Sized_relobj<64, false>::Symbols* sympointers,
2767 #ifdef HAVE_TARGET_64_BIG
2770 Symbol_table::add_from_relobj<64, true>(
2771 Sized_relobj<64, true>* relobj,
2772 const unsigned char* syms,
2774 size_t symndx_offset,
2775 const char* sym_names,
2776 size_t sym_name_size,
2777 Sized_relobj<64, true>::Symbols* sympointers,
2781 #ifdef HAVE_TARGET_32_LITTLE
2784 Symbol_table::add_from_pluginobj<32, false>(
2785 Sized_pluginobj<32, false>* obj,
2788 elfcpp::Sym<32, false>* sym);
2791 #ifdef HAVE_TARGET_32_BIG
2794 Symbol_table::add_from_pluginobj<32, true>(
2795 Sized_pluginobj<32, true>* obj,
2798 elfcpp::Sym<32, true>* sym);
2801 #ifdef HAVE_TARGET_64_LITTLE
2804 Symbol_table::add_from_pluginobj<64, false>(
2805 Sized_pluginobj<64, false>* obj,
2808 elfcpp::Sym<64, false>* sym);
2811 #ifdef HAVE_TARGET_64_BIG
2814 Symbol_table::add_from_pluginobj<64, true>(
2815 Sized_pluginobj<64, true>* obj,
2818 elfcpp::Sym<64, true>* sym);
2821 #ifdef HAVE_TARGET_32_LITTLE
2824 Symbol_table::add_from_dynobj<32, false>(
2825 Sized_dynobj<32, false>* dynobj,
2826 const unsigned char* syms,
2828 const char* sym_names,
2829 size_t sym_name_size,
2830 const unsigned char* versym,
2832 const std::vector<const char*>* version_map,
2833 Sized_relobj<32, false>::Symbols* sympointers,
2837 #ifdef HAVE_TARGET_32_BIG
2840 Symbol_table::add_from_dynobj<32, true>(
2841 Sized_dynobj<32, true>* dynobj,
2842 const unsigned char* syms,
2844 const char* sym_names,
2845 size_t sym_name_size,
2846 const unsigned char* versym,
2848 const std::vector<const char*>* version_map,
2849 Sized_relobj<32, true>::Symbols* sympointers,
2853 #ifdef HAVE_TARGET_64_LITTLE
2856 Symbol_table::add_from_dynobj<64, false>(
2857 Sized_dynobj<64, false>* dynobj,
2858 const unsigned char* syms,
2860 const char* sym_names,
2861 size_t sym_name_size,
2862 const unsigned char* versym,
2864 const std::vector<const char*>* version_map,
2865 Sized_relobj<64, false>::Symbols* sympointers,
2869 #ifdef HAVE_TARGET_64_BIG
2872 Symbol_table::add_from_dynobj<64, true>(
2873 Sized_dynobj<64, true>* dynobj,
2874 const unsigned char* syms,
2876 const char* sym_names,
2877 size_t sym_name_size,
2878 const unsigned char* versym,
2880 const std::vector<const char*>* version_map,
2881 Sized_relobj<64, true>::Symbols* sympointers,
2885 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
2888 Symbol_table::define_with_copy_reloc<32>(
2889 Sized_symbol<32>* sym,
2891 elfcpp::Elf_types<32>::Elf_Addr value);
2894 #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
2897 Symbol_table::define_with_copy_reloc<64>(
2898 Sized_symbol<64>* sym,
2900 elfcpp::Elf_types<64>::Elf_Addr value);
2903 #ifdef HAVE_TARGET_32_LITTLE
2906 Warnings::issue_warning<32, false>(const Symbol* sym,
2907 const Relocate_info<32, false>* relinfo,
2908 size_t relnum, off_t reloffset) const;
2911 #ifdef HAVE_TARGET_32_BIG
2914 Warnings::issue_warning<32, true>(const Symbol* sym,
2915 const Relocate_info<32, true>* relinfo,
2916 size_t relnum, off_t reloffset) const;
2919 #ifdef HAVE_TARGET_64_LITTLE
2922 Warnings::issue_warning<64, false>(const Symbol* sym,
2923 const Relocate_info<64, false>* relinfo,
2924 size_t relnum, off_t reloffset) const;
2927 #ifdef HAVE_TARGET_64_BIG
2930 Warnings::issue_warning<64, true>(const Symbol* sym,
2931 const Relocate_info<64, true>* relinfo,
2932 size_t relnum, off_t reloffset) const;
2935 } // End namespace gold.