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"
46 // Initialize fields in Symbol. This initializes everything except u_
50 Symbol::init_fields(const char* name, const char* version,
51 elfcpp::STT type, elfcpp::STB binding,
52 elfcpp::STV visibility, unsigned char nonvis)
55 this->version_ = version;
56 this->symtab_index_ = 0;
57 this->dynsym_index_ = 0;
58 this->got_offsets_.init();
59 this->plt_offset_ = 0;
61 this->binding_ = binding;
62 this->visibility_ = visibility;
63 this->nonvis_ = nonvis;
64 this->is_target_special_ = false;
65 this->is_def_ = false;
66 this->is_forwarder_ = false;
67 this->has_alias_ = false;
68 this->needs_dynsym_entry_ = false;
69 this->in_reg_ = false;
70 this->in_dyn_ = false;
71 this->has_plt_offset_ = false;
72 this->has_warning_ = false;
73 this->is_copied_from_dynobj_ = false;
74 this->is_forced_local_ = false;
75 this->is_ordinary_shndx_ = false;
78 // Return the demangled version of the symbol's name, but only
79 // if the --demangle flag was set.
82 demangle(const char* name)
84 if (!parameters->options().do_demangle())
87 // cplus_demangle allocates memory for the result it returns,
88 // and returns NULL if the name is already demangled.
89 char* demangled_name = cplus_demangle(name, DMGL_ANSI | DMGL_PARAMS);
90 if (demangled_name == NULL)
93 std::string retval(demangled_name);
99 Symbol::demangled_name() const
101 return demangle(this->name());
104 // Initialize the fields in the base class Symbol for SYM in OBJECT.
106 template<int size, bool big_endian>
108 Symbol::init_base_object(const char* name, const char* version, Object* object,
109 const elfcpp::Sym<size, big_endian>& sym,
110 unsigned int st_shndx, bool is_ordinary)
112 this->init_fields(name, version, sym.get_st_type(), sym.get_st_bind(),
113 sym.get_st_visibility(), sym.get_st_nonvis());
114 this->u_.from_object.object = object;
115 this->u_.from_object.shndx = st_shndx;
116 this->is_ordinary_shndx_ = is_ordinary;
117 this->source_ = FROM_OBJECT;
118 this->in_reg_ = !object->is_dynamic();
119 this->in_dyn_ = object->is_dynamic();
122 // Initialize the fields in the base class Symbol for a symbol defined
123 // in an Output_data.
126 Symbol::init_base_output_data(const char* name, const char* version,
127 Output_data* od, elfcpp::STT type,
128 elfcpp::STB binding, elfcpp::STV visibility,
129 unsigned char nonvis, bool offset_is_from_end)
131 this->init_fields(name, version, type, binding, visibility, nonvis);
132 this->u_.in_output_data.output_data = od;
133 this->u_.in_output_data.offset_is_from_end = offset_is_from_end;
134 this->source_ = IN_OUTPUT_DATA;
135 this->in_reg_ = true;
138 // Initialize the fields in the base class Symbol for a symbol defined
139 // in an Output_segment.
142 Symbol::init_base_output_segment(const char* name, const char* version,
143 Output_segment* os, elfcpp::STT type,
144 elfcpp::STB binding, elfcpp::STV visibility,
145 unsigned char nonvis,
146 Segment_offset_base offset_base)
148 this->init_fields(name, version, type, binding, visibility, nonvis);
149 this->u_.in_output_segment.output_segment = os;
150 this->u_.in_output_segment.offset_base = offset_base;
151 this->source_ = IN_OUTPUT_SEGMENT;
152 this->in_reg_ = true;
155 // Initialize the fields in the base class Symbol for a symbol defined
159 Symbol::init_base_constant(const char* name, const char* version,
160 elfcpp::STT type, elfcpp::STB binding,
161 elfcpp::STV visibility, unsigned char nonvis)
163 this->init_fields(name, version, type, binding, visibility, nonvis);
164 this->source_ = IS_CONSTANT;
165 this->in_reg_ = true;
168 // Initialize the fields in the base class Symbol for an undefined
172 Symbol::init_base_undefined(const char* name, const char* version,
173 elfcpp::STT type, elfcpp::STB binding,
174 elfcpp::STV visibility, unsigned char nonvis)
176 this->init_fields(name, version, type, binding, visibility, nonvis);
177 this->source_ = IS_UNDEFINED;
178 this->in_reg_ = true;
181 // Allocate a common symbol in the base.
184 Symbol::allocate_base_common(Output_data* od)
186 gold_assert(this->is_common());
187 this->source_ = IN_OUTPUT_DATA;
188 this->u_.in_output_data.output_data = od;
189 this->u_.in_output_data.offset_is_from_end = false;
192 // Initialize the fields in Sized_symbol for SYM in OBJECT.
195 template<bool big_endian>
197 Sized_symbol<size>::init_object(const char* name, const char* version,
199 const elfcpp::Sym<size, big_endian>& sym,
200 unsigned int st_shndx, bool is_ordinary)
202 this->init_base_object(name, version, object, sym, st_shndx, is_ordinary);
203 this->value_ = sym.get_st_value();
204 this->symsize_ = sym.get_st_size();
207 // Initialize the fields in Sized_symbol for a symbol defined in an
212 Sized_symbol<size>::init_output_data(const char* name, const char* version,
213 Output_data* od, Value_type value,
214 Size_type symsize, elfcpp::STT type,
216 elfcpp::STV visibility,
217 unsigned char nonvis,
218 bool offset_is_from_end)
220 this->init_base_output_data(name, version, od, type, binding, visibility,
221 nonvis, offset_is_from_end);
222 this->value_ = value;
223 this->symsize_ = symsize;
226 // Initialize the fields in Sized_symbol for a symbol defined in an
231 Sized_symbol<size>::init_output_segment(const char* name, const char* version,
232 Output_segment* os, Value_type value,
233 Size_type symsize, elfcpp::STT type,
235 elfcpp::STV visibility,
236 unsigned char nonvis,
237 Segment_offset_base offset_base)
239 this->init_base_output_segment(name, version, os, type, binding, visibility,
240 nonvis, offset_base);
241 this->value_ = value;
242 this->symsize_ = symsize;
245 // Initialize the fields in Sized_symbol for a symbol defined as a
250 Sized_symbol<size>::init_constant(const char* name, const char* version,
251 Value_type value, Size_type symsize,
252 elfcpp::STT type, elfcpp::STB binding,
253 elfcpp::STV visibility, unsigned char nonvis)
255 this->init_base_constant(name, version, type, binding, visibility, nonvis);
256 this->value_ = value;
257 this->symsize_ = symsize;
260 // Initialize the fields in Sized_symbol for an undefined symbol.
264 Sized_symbol<size>::init_undefined(const char* name, const char* version,
265 elfcpp::STT type, elfcpp::STB binding,
266 elfcpp::STV visibility, unsigned char nonvis)
268 this->init_base_undefined(name, version, type, binding, visibility, nonvis);
273 // Allocate a common symbol.
277 Sized_symbol<size>::allocate_common(Output_data* od, Value_type value)
279 this->allocate_base_common(od);
280 this->value_ = value;
283 // Return true if this symbol should be added to the dynamic symbol
287 Symbol::should_add_dynsym_entry() const
289 // If the symbol is used by a dynamic relocation, we need to add it.
290 if (this->needs_dynsym_entry())
293 // If the symbol was forced local in a version script, do not add it.
294 if (this->is_forced_local())
297 // If exporting all symbols or building a shared library,
298 // and the symbol is defined in a regular object and is
299 // externally visible, we need to add it.
300 if ((parameters->options().export_dynamic() || parameters->options().shared())
301 && !this->is_from_dynobj()
302 && this->is_externally_visible())
308 // Return true if the final value of this symbol is known at link
312 Symbol::final_value_is_known() const
314 // If we are not generating an executable, then no final values are
315 // known, since they will change at runtime.
316 if (parameters->options().shared() || parameters->options().relocatable())
319 // If the symbol is not from an object file, and is not undefined,
320 // then it is defined, and known.
321 if (this->source_ != FROM_OBJECT)
323 if (this->source_ != IS_UNDEFINED)
328 // If the symbol is from a dynamic object, then the final value
330 if (this->object()->is_dynamic())
333 // If the symbol is not undefined (it is defined or common),
334 // then the final value is known.
335 if (!this->is_undefined())
339 // If the symbol is undefined, then whether the final value is known
340 // depends on whether we are doing a static link. If we are doing a
341 // dynamic link, then the final value could be filled in at runtime.
342 // This could reasonably be the case for a weak undefined symbol.
343 return parameters->doing_static_link();
346 // Return the output section where this symbol is defined.
349 Symbol::output_section() const
351 switch (this->source_)
355 unsigned int shndx = this->u_.from_object.shndx;
356 if (shndx != elfcpp::SHN_UNDEF && this->is_ordinary_shndx_)
358 gold_assert(!this->u_.from_object.object->is_dynamic());
359 Relobj* relobj = static_cast<Relobj*>(this->u_.from_object.object);
360 return relobj->output_section(shndx);
366 return this->u_.in_output_data.output_data->output_section();
368 case IN_OUTPUT_SEGMENT:
378 // Set the symbol's output section. This is used for symbols defined
379 // in scripts. This should only be called after the symbol table has
383 Symbol::set_output_section(Output_section* os)
385 switch (this->source_)
389 gold_assert(this->output_section() == os);
392 this->source_ = IN_OUTPUT_DATA;
393 this->u_.in_output_data.output_data = os;
394 this->u_.in_output_data.offset_is_from_end = false;
396 case IN_OUTPUT_SEGMENT:
403 // Class Symbol_table.
405 Symbol_table::Symbol_table(unsigned int count,
406 const Version_script_info& version_script)
407 : saw_undefined_(0), offset_(0), table_(count), namepool_(),
408 forwarders_(), commons_(), tls_commons_(), forced_locals_(), warnings_(),
409 version_script_(version_script)
411 namepool_.reserve(count);
414 Symbol_table::~Symbol_table()
418 // The hash function. The key values are Stringpool keys.
421 Symbol_table::Symbol_table_hash::operator()(const Symbol_table_key& key) const
423 return key.first ^ key.second;
426 // The symbol table key equality function. This is called with
430 Symbol_table::Symbol_table_eq::operator()(const Symbol_table_key& k1,
431 const Symbol_table_key& k2) const
433 return k1.first == k2.first && k1.second == k2.second;
436 // Make TO a symbol which forwards to FROM.
439 Symbol_table::make_forwarder(Symbol* from, Symbol* to)
441 gold_assert(from != to);
442 gold_assert(!from->is_forwarder() && !to->is_forwarder());
443 this->forwarders_[from] = to;
444 from->set_forwarder();
447 // Resolve the forwards from FROM, returning the real symbol.
450 Symbol_table::resolve_forwards(const Symbol* from) const
452 gold_assert(from->is_forwarder());
453 Unordered_map<const Symbol*, Symbol*>::const_iterator p =
454 this->forwarders_.find(from);
455 gold_assert(p != this->forwarders_.end());
459 // Look up a symbol by name.
462 Symbol_table::lookup(const char* name, const char* version) const
464 Stringpool::Key name_key;
465 name = this->namepool_.find(name, &name_key);
469 Stringpool::Key version_key = 0;
472 version = this->namepool_.find(version, &version_key);
477 Symbol_table_key key(name_key, version_key);
478 Symbol_table::Symbol_table_type::const_iterator p = this->table_.find(key);
479 if (p == this->table_.end())
484 // Resolve a Symbol with another Symbol. This is only used in the
485 // unusual case where there are references to both an unversioned
486 // symbol and a symbol with a version, and we then discover that that
487 // version is the default version. Because this is unusual, we do
488 // this the slow way, by converting back to an ELF symbol.
490 template<int size, bool big_endian>
492 Symbol_table::resolve(Sized_symbol<size>* to, const Sized_symbol<size>* from)
494 unsigned char buf[elfcpp::Elf_sizes<size>::sym_size];
495 elfcpp::Sym_write<size, big_endian> esym(buf);
496 // We don't bother to set the st_name or the st_shndx field.
497 esym.put_st_value(from->value());
498 esym.put_st_size(from->symsize());
499 esym.put_st_info(from->binding(), from->type());
500 esym.put_st_other(from->visibility(), from->nonvis());
502 unsigned int shndx = from->shndx(&is_ordinary);
503 this->resolve(to, esym.sym(), shndx, is_ordinary, shndx, from->object(),
511 // Record that a symbol is forced to be local by a version script.
514 Symbol_table::force_local(Symbol* sym)
516 if (!sym->is_defined() && !sym->is_common())
518 if (sym->is_forced_local())
520 // We already got this one.
523 sym->set_is_forced_local();
524 this->forced_locals_.push_back(sym);
527 // Adjust NAME for wrapping, and update *NAME_KEY if necessary. This
528 // is only called for undefined symbols, when at least one --wrap
532 Symbol_table::wrap_symbol(Object* object, const char* name,
533 Stringpool::Key* name_key)
535 // For some targets, we need to ignore a specific character when
536 // wrapping, and add it back later.
538 if (name[0] == object->target()->wrap_char())
544 if (parameters->options().is_wrap(name))
546 // Turn NAME into __wrap_NAME.
553 // This will give us both the old and new name in NAMEPOOL_, but
554 // that is OK. Only the versions we need will wind up in the
555 // real string table in the output file.
556 return this->namepool_.add(s.c_str(), true, name_key);
559 const char* const real_prefix = "__real_";
560 const size_t real_prefix_length = strlen(real_prefix);
561 if (strncmp(name, real_prefix, real_prefix_length) == 0
562 && parameters->options().is_wrap(name + real_prefix_length))
564 // Turn __real_NAME into NAME.
568 s += name + real_prefix_length;
569 return this->namepool_.add(s.c_str(), true, name_key);
575 // Add one symbol from OBJECT to the symbol table. NAME is symbol
576 // name and VERSION is the version; both are canonicalized. DEF is
577 // whether this is the default version. ST_SHNDX is the symbol's
578 // section index; IS_ORDINARY is whether this is a normal section
579 // rather than a special code.
581 // If DEF is true, then this is the definition of a default version of
582 // a symbol. That means that any lookup of NAME/NULL and any lookup
583 // of NAME/VERSION should always return the same symbol. This is
584 // obvious for references, but in particular we want to do this for
585 // definitions: overriding NAME/NULL should also override
586 // NAME/VERSION. If we don't do that, it would be very hard to
587 // override functions in a shared library which uses versioning.
589 // We implement this by simply making both entries in the hash table
590 // point to the same Symbol structure. That is easy enough if this is
591 // the first time we see NAME/NULL or NAME/VERSION, but it is possible
592 // that we have seen both already, in which case they will both have
593 // independent entries in the symbol table. We can't simply change
594 // the symbol table entry, because we have pointers to the entries
595 // attached to the object files. So we mark the entry attached to the
596 // object file as a forwarder, and record it in the forwarders_ map.
597 // Note that entries in the hash table will never be marked as
600 // ORIG_ST_SHNDX and ST_SHNDX are almost always the same.
601 // ORIG_ST_SHNDX is the section index in the input file, or SHN_UNDEF
602 // for a special section code. ST_SHNDX may be modified if the symbol
603 // is defined in a section being discarded.
605 template<int size, bool big_endian>
607 Symbol_table::add_from_object(Object* object,
609 Stringpool::Key name_key,
611 Stringpool::Key version_key,
613 const elfcpp::Sym<size, big_endian>& sym,
614 unsigned int st_shndx,
616 unsigned int orig_st_shndx)
618 // Print a message if this symbol is being traced.
619 if (parameters->options().is_trace_symbol(name))
621 if (orig_st_shndx == elfcpp::SHN_UNDEF)
622 gold_info(_("%s: reference to %s"), object->name().c_str(), name);
624 gold_info(_("%s: definition of %s"), object->name().c_str(), name);
627 // For an undefined symbol, we may need to adjust the name using
629 if (orig_st_shndx == elfcpp::SHN_UNDEF
630 && parameters->options().any_wrap())
632 const char* wrap_name = this->wrap_symbol(object, name, &name_key);
633 if (wrap_name != name)
635 // If we see a reference to malloc with version GLIBC_2.0,
636 // and we turn it into a reference to __wrap_malloc, then we
637 // discard the version number. Otherwise the user would be
638 // required to specify the correct version for
646 Symbol* const snull = NULL;
647 std::pair<typename Symbol_table_type::iterator, bool> ins =
648 this->table_.insert(std::make_pair(std::make_pair(name_key, version_key),
651 std::pair<typename Symbol_table_type::iterator, bool> insdef =
652 std::make_pair(this->table_.end(), false);
655 const Stringpool::Key vnull_key = 0;
656 insdef = this->table_.insert(std::make_pair(std::make_pair(name_key,
661 // ins.first: an iterator, which is a pointer to a pair.
662 // ins.first->first: the key (a pair of name and version).
663 // ins.first->second: the value (Symbol*).
664 // ins.second: true if new entry was inserted, false if not.
666 Sized_symbol<size>* ret;
671 // We already have an entry for NAME/VERSION.
672 ret = this->get_sized_symbol<size>(ins.first->second);
673 gold_assert(ret != NULL);
675 was_undefined = ret->is_undefined();
676 was_common = ret->is_common();
678 this->resolve(ret, sym, st_shndx, is_ordinary, orig_st_shndx, object,
685 // This is the first time we have seen NAME/NULL. Make
686 // NAME/NULL point to NAME/VERSION.
687 insdef.first->second = ret;
689 else if (insdef.first->second != ret)
691 // This is the unfortunate case where we already have
692 // entries for both NAME/VERSION and NAME/NULL. We now
693 // see a symbol NAME/VERSION where VERSION is the
694 // default version. We have already resolved this new
695 // symbol with the existing NAME/VERSION symbol.
697 // It's possible that NAME/NULL and NAME/VERSION are
698 // both defined in regular objects. This can only
699 // happen if one object file defines foo and another
700 // defines foo@@ver. This is somewhat obscure, but we
701 // call it a multiple definition error.
703 // It's possible that NAME/NULL actually has a version,
704 // in which case it won't be the same as VERSION. This
705 // happens with ver_test_7.so in the testsuite for the
706 // symbol t2_2. We see t2_2@@VER2, so we define both
707 // t2_2/VER2 and t2_2/NULL. We then see an unadorned
708 // t2_2 in an object file and give it version VER1 from
709 // the version script. This looks like a default
710 // definition for VER1, so it looks like we should merge
711 // t2_2/NULL with t2_2/VER1. That doesn't make sense,
712 // but it's not obvious that this is an error, either.
715 // If one of the symbols has non-default visibility, and
716 // the other is defined in a shared object, then they
717 // are different symbols.
719 // Otherwise, we just resolve the symbols as though they
722 if (insdef.first->second->version() != NULL)
724 gold_assert(insdef.first->second->version() != version);
727 else if (ret->visibility() != elfcpp::STV_DEFAULT
728 && insdef.first->second->is_from_dynobj())
730 else if (insdef.first->second->visibility() != elfcpp::STV_DEFAULT
731 && ret->is_from_dynobj())
735 const Sized_symbol<size>* sym2;
736 sym2 = this->get_sized_symbol<size>(insdef.first->second);
737 Symbol_table::resolve<size, big_endian>(ret, sym2);
738 this->make_forwarder(insdef.first->second, ret);
739 insdef.first->second = ret;
748 // This is the first time we have seen NAME/VERSION.
749 gold_assert(ins.first->second == NULL);
751 if (def && !insdef.second)
753 // We already have an entry for NAME/NULL. If we override
754 // it, then change it to NAME/VERSION.
755 ret = this->get_sized_symbol<size>(insdef.first->second);
757 was_undefined = ret->is_undefined();
758 was_common = ret->is_common();
760 this->resolve(ret, sym, st_shndx, is_ordinary, orig_st_shndx, object,
762 ins.first->second = ret;
766 was_undefined = false;
769 Sized_target<size, big_endian>* target =
770 object->sized_target<size, big_endian>();
771 if (!target->has_make_symbol())
772 ret = new Sized_symbol<size>();
775 ret = target->make_symbol();
778 // This means that we don't want a symbol table
781 this->table_.erase(ins.first);
784 this->table_.erase(insdef.first);
785 // Inserting insdef invalidated ins.
786 this->table_.erase(std::make_pair(name_key,
793 ret->init_object(name, version, object, sym, st_shndx, is_ordinary);
795 ins.first->second = ret;
798 // This is the first time we have seen NAME/NULL. Point
799 // it at the new entry for NAME/VERSION.
800 gold_assert(insdef.second);
801 insdef.first->second = ret;
806 // Record every time we see a new undefined symbol, to speed up
808 if (!was_undefined && ret->is_undefined())
809 ++this->saw_undefined_;
811 // Keep track of common symbols, to speed up common symbol
813 if (!was_common && ret->is_common())
815 if (ret->type() != elfcpp::STT_TLS)
816 this->commons_.push_back(ret);
818 this->tls_commons_.push_back(ret);
822 ret->set_is_default();
826 // Add all the symbols in a relocatable object to the hash table.
828 template<int size, bool big_endian>
830 Symbol_table::add_from_relobj(
831 Sized_relobj<size, big_endian>* relobj,
832 const unsigned char* syms,
834 size_t symndx_offset,
835 const char* sym_names,
836 size_t sym_name_size,
837 typename Sized_relobj<size, big_endian>::Symbols* sympointers,
842 gold_assert(size == relobj->target()->get_size());
843 gold_assert(size == parameters->target().get_size());
845 const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
847 const bool just_symbols = relobj->just_symbols();
849 const unsigned char* p = syms;
850 for (size_t i = 0; i < count; ++i, p += sym_size)
852 (*sympointers)[i] = NULL;
854 elfcpp::Sym<size, big_endian> sym(p);
856 unsigned int st_name = sym.get_st_name();
857 if (st_name >= sym_name_size)
859 relobj->error(_("bad global symbol name offset %u at %zu"),
864 const char* name = sym_names + st_name;
867 unsigned int st_shndx = relobj->adjust_sym_shndx(i + symndx_offset,
870 unsigned int orig_st_shndx = st_shndx;
872 orig_st_shndx = elfcpp::SHN_UNDEF;
874 if (st_shndx != elfcpp::SHN_UNDEF)
877 // A symbol defined in a section which we are not including must
878 // be treated as an undefined symbol.
879 if (st_shndx != elfcpp::SHN_UNDEF
881 && !relobj->is_section_included(st_shndx))
882 st_shndx = elfcpp::SHN_UNDEF;
884 // In an object file, an '@' in the name separates the symbol
885 // name from the version name. If there are two '@' characters,
886 // this is the default version.
887 const char* ver = strchr(name, '@');
889 // DEF: is the version default? LOCAL: is the symbol forced local?
895 // The symbol name is of the form foo@VERSION or foo@@VERSION
896 namelen = ver - name;
904 // We don't want to assign a version to an undefined symbol,
905 // even if it is listed in the version script. FIXME: What
906 // about a common symbol?
907 else if (!version_script_.empty()
908 && st_shndx != elfcpp::SHN_UNDEF)
910 // The symbol name did not have a version, but
911 // the version script may assign a version anyway.
912 namelen = strlen(name);
914 // Check the global: entries from the version script.
915 const std::string& version =
916 version_script_.get_symbol_version(name);
917 if (!version.empty())
918 ver = version.c_str();
919 // Check the local: entries from the version script
920 if (version_script_.symbol_is_local(name))
924 elfcpp::Sym<size, big_endian>* psym = &sym;
925 unsigned char symbuf[sym_size];
926 elfcpp::Sym<size, big_endian> sym2(symbuf);
929 memcpy(symbuf, p, sym_size);
930 elfcpp::Sym_write<size, big_endian> sw(symbuf);
931 if (orig_st_shndx != elfcpp::SHN_UNDEF && is_ordinary)
933 // Symbol values in object files are section relative.
934 // This is normally what we want, but since here we are
935 // converting the symbol to absolute we need to add the
936 // section address. The section address in an object
937 // file is normally zero, but people can use a linker
938 // script to change it.
939 sw.put_st_value(sym.get_st_value()
940 + relobj->section_address(orig_st_shndx));
942 st_shndx = elfcpp::SHN_ABS;
947 Sized_symbol<size>* res;
950 Stringpool::Key name_key;
951 name = this->namepool_.add(name, true, &name_key);
952 res = this->add_from_object(relobj, name, name_key, NULL, 0,
953 false, *psym, st_shndx, is_ordinary,
956 this->force_local(res);
960 Stringpool::Key name_key;
961 name = this->namepool_.add_with_length(name, namelen, true,
963 Stringpool::Key ver_key;
964 ver = this->namepool_.add(ver, true, &ver_key);
966 res = this->add_from_object(relobj, name, name_key, ver, ver_key,
967 def, *psym, st_shndx, is_ordinary,
971 (*sympointers)[i] = res;
975 // Add all the symbols in a dynamic object to the hash table.
977 template<int size, bool big_endian>
979 Symbol_table::add_from_dynobj(
980 Sized_dynobj<size, big_endian>* dynobj,
981 const unsigned char* syms,
983 const char* sym_names,
984 size_t sym_name_size,
985 const unsigned char* versym,
987 const std::vector<const char*>* version_map,
988 typename Sized_relobj<size, big_endian>::Symbols* sympointers,
993 gold_assert(size == dynobj->target()->get_size());
994 gold_assert(size == parameters->target().get_size());
996 if (dynobj->just_symbols())
998 gold_error(_("--just-symbols does not make sense with a shared object"));
1002 if (versym != NULL && versym_size / 2 < count)
1004 dynobj->error(_("too few symbol versions"));
1008 const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
1010 // We keep a list of all STT_OBJECT symbols, so that we can resolve
1011 // weak aliases. This is necessary because if the dynamic object
1012 // provides the same variable under two names, one of which is a
1013 // weak definition, and the regular object refers to the weak
1014 // definition, we have to put both the weak definition and the
1015 // strong definition into the dynamic symbol table. Given a weak
1016 // definition, the only way that we can find the corresponding
1017 // strong definition, if any, is to search the symbol table.
1018 std::vector<Sized_symbol<size>*> object_symbols;
1020 const unsigned char* p = syms;
1021 const unsigned char* vs = versym;
1022 for (size_t i = 0; i < count; ++i, p += sym_size, vs += 2)
1024 elfcpp::Sym<size, big_endian> sym(p);
1026 if (sympointers != NULL)
1027 (*sympointers)[i] = NULL;
1029 // Ignore symbols with local binding or that have
1030 // internal or hidden visibility.
1031 if (sym.get_st_bind() == elfcpp::STB_LOCAL
1032 || sym.get_st_visibility() == elfcpp::STV_INTERNAL
1033 || sym.get_st_visibility() == elfcpp::STV_HIDDEN)
1036 // A protected symbol in a shared library must be treated as a
1037 // normal symbol when viewed from outside the shared library.
1038 // Implement this by overriding the visibility here.
1039 elfcpp::Sym<size, big_endian>* psym = &sym;
1040 unsigned char symbuf[sym_size];
1041 elfcpp::Sym<size, big_endian> sym2(symbuf);
1042 if (sym.get_st_visibility() == elfcpp::STV_PROTECTED)
1044 memcpy(symbuf, p, sym_size);
1045 elfcpp::Sym_write<size, big_endian> sw(symbuf);
1046 sw.put_st_other(elfcpp::STV_DEFAULT, sym.get_st_nonvis());
1050 unsigned int st_name = psym->get_st_name();
1051 if (st_name >= sym_name_size)
1053 dynobj->error(_("bad symbol name offset %u at %zu"),
1058 const char* name = sym_names + st_name;
1061 unsigned int st_shndx = dynobj->adjust_sym_shndx(i, psym->get_st_shndx(),
1064 if (st_shndx != elfcpp::SHN_UNDEF)
1067 Sized_symbol<size>* res;
1071 Stringpool::Key name_key;
1072 name = this->namepool_.add(name, true, &name_key);
1073 res = this->add_from_object(dynobj, name, name_key, NULL, 0,
1074 false, *psym, st_shndx, is_ordinary,
1079 // Read the version information.
1081 unsigned int v = elfcpp::Swap<16, big_endian>::readval(vs);
1083 bool hidden = (v & elfcpp::VERSYM_HIDDEN) != 0;
1084 v &= elfcpp::VERSYM_VERSION;
1086 // The Sun documentation says that V can be VER_NDX_LOCAL,
1087 // or VER_NDX_GLOBAL, or a version index. The meaning of
1088 // VER_NDX_LOCAL is defined as "Symbol has local scope."
1089 // The old GNU linker will happily generate VER_NDX_LOCAL
1090 // for an undefined symbol. I don't know what the Sun
1091 // linker will generate.
1093 if (v == static_cast<unsigned int>(elfcpp::VER_NDX_LOCAL)
1094 && st_shndx != elfcpp::SHN_UNDEF)
1096 // This symbol should not be visible outside the object.
1100 // At this point we are definitely going to add this symbol.
1101 Stringpool::Key name_key;
1102 name = this->namepool_.add(name, true, &name_key);
1104 if (v == static_cast<unsigned int>(elfcpp::VER_NDX_LOCAL)
1105 || v == static_cast<unsigned int>(elfcpp::VER_NDX_GLOBAL))
1107 // This symbol does not have a version.
1108 res = this->add_from_object(dynobj, name, name_key, NULL, 0,
1109 false, *psym, st_shndx, is_ordinary,
1114 if (v >= version_map->size())
1116 dynobj->error(_("versym for symbol %zu out of range: %u"),
1121 const char* version = (*version_map)[v];
1122 if (version == NULL)
1124 dynobj->error(_("versym for symbol %zu has no name: %u"),
1129 Stringpool::Key version_key;
1130 version = this->namepool_.add(version, true, &version_key);
1132 // If this is an absolute symbol, and the version name
1133 // and symbol name are the same, then this is the
1134 // version definition symbol. These symbols exist to
1135 // support using -u to pull in particular versions. We
1136 // do not want to record a version for them.
1137 if (st_shndx == elfcpp::SHN_ABS
1139 && name_key == version_key)
1140 res = this->add_from_object(dynobj, name, name_key, NULL, 0,
1141 false, *psym, st_shndx, is_ordinary,
1145 const bool def = (!hidden
1146 && st_shndx != elfcpp::SHN_UNDEF);
1147 res = this->add_from_object(dynobj, name, name_key, version,
1148 version_key, def, *psym, st_shndx,
1149 is_ordinary, st_shndx);
1154 // Note that it is possible that RES was overridden by an
1155 // earlier object, in which case it can't be aliased here.
1156 if (st_shndx != elfcpp::SHN_UNDEF
1158 && psym->get_st_type() == elfcpp::STT_OBJECT
1159 && res->source() == Symbol::FROM_OBJECT
1160 && res->object() == dynobj)
1161 object_symbols.push_back(res);
1163 if (sympointers != NULL)
1164 (*sympointers)[i] = res;
1167 this->record_weak_aliases(&object_symbols);
1170 // This is used to sort weak aliases. We sort them first by section
1171 // index, then by offset, then by weak ahead of strong.
1174 class Weak_alias_sorter
1177 bool operator()(const Sized_symbol<size>*, const Sized_symbol<size>*) const;
1182 Weak_alias_sorter<size>::operator()(const Sized_symbol<size>* s1,
1183 const Sized_symbol<size>* s2) const
1186 unsigned int s1_shndx = s1->shndx(&is_ordinary);
1187 gold_assert(is_ordinary);
1188 unsigned int s2_shndx = s2->shndx(&is_ordinary);
1189 gold_assert(is_ordinary);
1190 if (s1_shndx != s2_shndx)
1191 return s1_shndx < s2_shndx;
1193 if (s1->value() != s2->value())
1194 return s1->value() < s2->value();
1195 if (s1->binding() != s2->binding())
1197 if (s1->binding() == elfcpp::STB_WEAK)
1199 if (s2->binding() == elfcpp::STB_WEAK)
1202 return std::string(s1->name()) < std::string(s2->name());
1205 // SYMBOLS is a list of object symbols from a dynamic object. Look
1206 // for any weak aliases, and record them so that if we add the weak
1207 // alias to the dynamic symbol table, we also add the corresponding
1212 Symbol_table::record_weak_aliases(std::vector<Sized_symbol<size>*>* symbols)
1214 // Sort the vector by section index, then by offset, then by weak
1216 std::sort(symbols->begin(), symbols->end(), Weak_alias_sorter<size>());
1218 // Walk through the vector. For each weak definition, record
1220 for (typename std::vector<Sized_symbol<size>*>::const_iterator p =
1222 p != symbols->end();
1225 if ((*p)->binding() != elfcpp::STB_WEAK)
1228 // Build a circular list of weak aliases. Each symbol points to
1229 // the next one in the circular list.
1231 Sized_symbol<size>* from_sym = *p;
1232 typename std::vector<Sized_symbol<size>*>::const_iterator q;
1233 for (q = p + 1; q != symbols->end(); ++q)
1236 if ((*q)->shndx(&dummy) != from_sym->shndx(&dummy)
1237 || (*q)->value() != from_sym->value())
1240 this->weak_aliases_[from_sym] = *q;
1241 from_sym->set_has_alias();
1247 this->weak_aliases_[from_sym] = *p;
1248 from_sym->set_has_alias();
1255 // Create and return a specially defined symbol. If ONLY_IF_REF is
1256 // true, then only create the symbol if there is a reference to it.
1257 // If this does not return NULL, it sets *POLDSYM to the existing
1258 // symbol if there is one. This canonicalizes *PNAME and *PVERSION.
1260 template<int size, bool big_endian>
1262 Symbol_table::define_special_symbol(const char** pname, const char** pversion,
1264 Sized_symbol<size>** poldsym)
1267 Sized_symbol<size>* sym;
1268 bool add_to_table = false;
1269 typename Symbol_table_type::iterator add_loc = this->table_.end();
1271 // If the caller didn't give us a version, see if we get one from
1272 // the version script.
1273 if (*pversion == NULL)
1275 const std::string& v(this->version_script_.get_symbol_version(*pname));
1277 *pversion = v.c_str();
1282 oldsym = this->lookup(*pname, *pversion);
1283 if (oldsym == NULL || !oldsym->is_undefined())
1286 *pname = oldsym->name();
1287 *pversion = oldsym->version();
1291 // Canonicalize NAME and VERSION.
1292 Stringpool::Key name_key;
1293 *pname = this->namepool_.add(*pname, true, &name_key);
1295 Stringpool::Key version_key = 0;
1296 if (*pversion != NULL)
1297 *pversion = this->namepool_.add(*pversion, true, &version_key);
1299 Symbol* const snull = NULL;
1300 std::pair<typename Symbol_table_type::iterator, bool> ins =
1301 this->table_.insert(std::make_pair(std::make_pair(name_key,
1307 // We already have a symbol table entry for NAME/VERSION.
1308 oldsym = ins.first->second;
1309 gold_assert(oldsym != NULL);
1313 // We haven't seen this symbol before.
1314 gold_assert(ins.first->second == NULL);
1315 add_to_table = true;
1316 add_loc = ins.first;
1321 const Target& target = parameters->target();
1322 if (!target.has_make_symbol())
1323 sym = new Sized_symbol<size>();
1326 gold_assert(target.get_size() == size);
1327 gold_assert(target.is_big_endian() ? big_endian : !big_endian);
1328 typedef Sized_target<size, big_endian> My_target;
1329 const My_target* sized_target =
1330 static_cast<const My_target*>(&target);
1331 sym = sized_target->make_symbol();
1337 add_loc->second = sym;
1339 gold_assert(oldsym != NULL);
1341 *poldsym = this->get_sized_symbol<size>(oldsym);
1346 // Define a symbol based on an Output_data.
1349 Symbol_table::define_in_output_data(const char* name,
1350 const char* version,
1355 elfcpp::STB binding,
1356 elfcpp::STV visibility,
1357 unsigned char nonvis,
1358 bool offset_is_from_end,
1361 if (parameters->target().get_size() == 32)
1363 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
1364 return this->do_define_in_output_data<32>(name, version, od,
1365 value, symsize, type, binding,
1373 else if (parameters->target().get_size() == 64)
1375 #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
1376 return this->do_define_in_output_data<64>(name, version, od,
1377 value, symsize, type, binding,
1389 // Define a symbol in an Output_data, sized version.
1393 Symbol_table::do_define_in_output_data(
1395 const char* version,
1397 typename elfcpp::Elf_types<size>::Elf_Addr value,
1398 typename elfcpp::Elf_types<size>::Elf_WXword symsize,
1400 elfcpp::STB binding,
1401 elfcpp::STV visibility,
1402 unsigned char nonvis,
1403 bool offset_is_from_end,
1406 Sized_symbol<size>* sym;
1407 Sized_symbol<size>* oldsym;
1409 if (parameters->target().is_big_endian())
1411 #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG)
1412 sym = this->define_special_symbol<size, true>(&name, &version,
1413 only_if_ref, &oldsym);
1420 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE)
1421 sym = this->define_special_symbol<size, false>(&name, &version,
1422 only_if_ref, &oldsym);
1431 sym->init_output_data(name, version, od, value, symsize, type, binding,
1432 visibility, nonvis, offset_is_from_end);
1436 if (binding == elfcpp::STB_LOCAL
1437 || this->version_script_.symbol_is_local(name))
1438 this->force_local(sym);
1439 else if (version != NULL)
1440 sym->set_is_default();
1444 if (Symbol_table::should_override_with_special(oldsym))
1445 this->override_with_special(oldsym, sym);
1450 // Define a symbol based on an Output_segment.
1453 Symbol_table::define_in_output_segment(const char* name,
1454 const char* version, Output_segment* os,
1458 elfcpp::STB binding,
1459 elfcpp::STV visibility,
1460 unsigned char nonvis,
1461 Symbol::Segment_offset_base offset_base,
1464 if (parameters->target().get_size() == 32)
1466 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
1467 return this->do_define_in_output_segment<32>(name, version, os,
1468 value, symsize, type,
1469 binding, visibility, nonvis,
1470 offset_base, only_if_ref);
1475 else if (parameters->target().get_size() == 64)
1477 #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
1478 return this->do_define_in_output_segment<64>(name, version, os,
1479 value, symsize, type,
1480 binding, visibility, nonvis,
1481 offset_base, only_if_ref);
1490 // Define a symbol in an Output_segment, sized version.
1494 Symbol_table::do_define_in_output_segment(
1496 const char* version,
1498 typename elfcpp::Elf_types<size>::Elf_Addr value,
1499 typename elfcpp::Elf_types<size>::Elf_WXword symsize,
1501 elfcpp::STB binding,
1502 elfcpp::STV visibility,
1503 unsigned char nonvis,
1504 Symbol::Segment_offset_base offset_base,
1507 Sized_symbol<size>* sym;
1508 Sized_symbol<size>* oldsym;
1510 if (parameters->target().is_big_endian())
1512 #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG)
1513 sym = this->define_special_symbol<size, true>(&name, &version,
1514 only_if_ref, &oldsym);
1521 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE)
1522 sym = this->define_special_symbol<size, false>(&name, &version,
1523 only_if_ref, &oldsym);
1532 sym->init_output_segment(name, version, os, value, symsize, type, binding,
1533 visibility, nonvis, offset_base);
1537 if (binding == elfcpp::STB_LOCAL
1538 || this->version_script_.symbol_is_local(name))
1539 this->force_local(sym);
1540 else if (version != NULL)
1541 sym->set_is_default();
1545 if (Symbol_table::should_override_with_special(oldsym))
1546 this->override_with_special(oldsym, sym);
1551 // Define a special symbol with a constant value. It is a multiple
1552 // definition error if this symbol is already defined.
1555 Symbol_table::define_as_constant(const char* name,
1556 const char* version,
1560 elfcpp::STB binding,
1561 elfcpp::STV visibility,
1562 unsigned char nonvis,
1564 bool force_override)
1566 if (parameters->target().get_size() == 32)
1568 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
1569 return this->do_define_as_constant<32>(name, version, value,
1570 symsize, type, binding,
1571 visibility, nonvis, only_if_ref,
1577 else if (parameters->target().get_size() == 64)
1579 #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
1580 return this->do_define_as_constant<64>(name, version, value,
1581 symsize, type, binding,
1582 visibility, nonvis, only_if_ref,
1592 // Define a symbol as a constant, sized version.
1596 Symbol_table::do_define_as_constant(
1598 const char* version,
1599 typename elfcpp::Elf_types<size>::Elf_Addr value,
1600 typename elfcpp::Elf_types<size>::Elf_WXword symsize,
1602 elfcpp::STB binding,
1603 elfcpp::STV visibility,
1604 unsigned char nonvis,
1606 bool force_override)
1608 Sized_symbol<size>* sym;
1609 Sized_symbol<size>* oldsym;
1611 if (parameters->target().is_big_endian())
1613 #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG)
1614 sym = this->define_special_symbol<size, true>(&name, &version,
1615 only_if_ref, &oldsym);
1622 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE)
1623 sym = this->define_special_symbol<size, false>(&name, &version,
1624 only_if_ref, &oldsym);
1633 sym->init_constant(name, version, value, symsize, type, binding, visibility,
1638 // Version symbols are absolute symbols with name == version.
1639 // We don't want to force them to be local.
1640 if ((version == NULL
1643 && (binding == elfcpp::STB_LOCAL
1644 || this->version_script_.symbol_is_local(name)))
1645 this->force_local(sym);
1646 else if (version != NULL
1647 && (name != version || value != 0))
1648 sym->set_is_default();
1652 if (force_override || Symbol_table::should_override_with_special(oldsym))
1653 this->override_with_special(oldsym, sym);
1658 // Define a set of symbols in output sections.
1661 Symbol_table::define_symbols(const Layout* layout, int count,
1662 const Define_symbol_in_section* p,
1665 for (int i = 0; i < count; ++i, ++p)
1667 Output_section* os = layout->find_output_section(p->output_section);
1669 this->define_in_output_data(p->name, NULL, os, p->value,
1670 p->size, p->type, p->binding,
1671 p->visibility, p->nonvis,
1672 p->offset_is_from_end,
1673 only_if_ref || p->only_if_ref);
1675 this->define_as_constant(p->name, NULL, 0, p->size, p->type,
1676 p->binding, p->visibility, p->nonvis,
1677 only_if_ref || p->only_if_ref,
1682 // Define a set of symbols in output segments.
1685 Symbol_table::define_symbols(const Layout* layout, int count,
1686 const Define_symbol_in_segment* p,
1689 for (int i = 0; i < count; ++i, ++p)
1691 Output_segment* os = layout->find_output_segment(p->segment_type,
1692 p->segment_flags_set,
1693 p->segment_flags_clear);
1695 this->define_in_output_segment(p->name, NULL, os, p->value,
1696 p->size, p->type, p->binding,
1697 p->visibility, p->nonvis,
1699 only_if_ref || p->only_if_ref);
1701 this->define_as_constant(p->name, NULL, 0, p->size, p->type,
1702 p->binding, p->visibility, p->nonvis,
1703 only_if_ref || p->only_if_ref,
1708 // Define CSYM using a COPY reloc. POSD is the Output_data where the
1709 // symbol should be defined--typically a .dyn.bss section. VALUE is
1710 // the offset within POSD.
1714 Symbol_table::define_with_copy_reloc(
1715 Sized_symbol<size>* csym,
1717 typename elfcpp::Elf_types<size>::Elf_Addr value)
1719 gold_assert(csym->is_from_dynobj());
1720 gold_assert(!csym->is_copied_from_dynobj());
1721 Object* object = csym->object();
1722 gold_assert(object->is_dynamic());
1723 Dynobj* dynobj = static_cast<Dynobj*>(object);
1725 // Our copied variable has to override any variable in a shared
1727 elfcpp::STB binding = csym->binding();
1728 if (binding == elfcpp::STB_WEAK)
1729 binding = elfcpp::STB_GLOBAL;
1731 this->define_in_output_data(csym->name(), csym->version(),
1732 posd, value, csym->symsize(),
1733 csym->type(), binding,
1734 csym->visibility(), csym->nonvis(),
1737 csym->set_is_copied_from_dynobj();
1738 csym->set_needs_dynsym_entry();
1740 this->copied_symbol_dynobjs_[csym] = dynobj;
1742 // We have now defined all aliases, but we have not entered them all
1743 // in the copied_symbol_dynobjs_ map.
1744 if (csym->has_alias())
1749 sym = this->weak_aliases_[sym];
1752 gold_assert(sym->output_data() == posd);
1754 sym->set_is_copied_from_dynobj();
1755 this->copied_symbol_dynobjs_[sym] = dynobj;
1760 // SYM is defined using a COPY reloc. Return the dynamic object where
1761 // the original definition was found.
1764 Symbol_table::get_copy_source(const Symbol* sym) const
1766 gold_assert(sym->is_copied_from_dynobj());
1767 Copied_symbol_dynobjs::const_iterator p =
1768 this->copied_symbol_dynobjs_.find(sym);
1769 gold_assert(p != this->copied_symbol_dynobjs_.end());
1773 // Add any undefined symbols named on the command line.
1776 Symbol_table::add_undefined_symbols_from_command_line()
1778 if (parameters->options().any_undefined())
1780 if (parameters->target().get_size() == 32)
1782 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
1783 this->do_add_undefined_symbols_from_command_line<32>();
1788 else if (parameters->target().get_size() == 64)
1790 #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
1791 this->do_add_undefined_symbols_from_command_line<64>();
1803 Symbol_table::do_add_undefined_symbols_from_command_line()
1805 for (options::String_set::const_iterator p =
1806 parameters->options().undefined_begin();
1807 p != parameters->options().undefined_end();
1810 const char* name = p->c_str();
1812 if (this->lookup(name) != NULL)
1815 const char* version = NULL;
1817 Sized_symbol<size>* sym;
1818 Sized_symbol<size>* oldsym;
1819 if (parameters->target().is_big_endian())
1821 #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG)
1822 sym = this->define_special_symbol<size, true>(&name, &version,
1830 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE)
1831 sym = this->define_special_symbol<size, false>(&name, &version,
1838 gold_assert(oldsym == NULL);
1840 sym->init_undefined(name, version, elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
1841 elfcpp::STV_DEFAULT, 0);
1842 ++this->saw_undefined_;
1846 // Set the dynamic symbol indexes. INDEX is the index of the first
1847 // global dynamic symbol. Pointers to the symbols are stored into the
1848 // vector SYMS. The names are added to DYNPOOL. This returns an
1849 // updated dynamic symbol index.
1852 Symbol_table::set_dynsym_indexes(unsigned int index,
1853 std::vector<Symbol*>* syms,
1854 Stringpool* dynpool,
1857 for (Symbol_table_type::iterator p = this->table_.begin();
1858 p != this->table_.end();
1861 Symbol* sym = p->second;
1863 // Note that SYM may already have a dynamic symbol index, since
1864 // some symbols appear more than once in the symbol table, with
1865 // and without a version.
1867 if (!sym->should_add_dynsym_entry())
1868 sym->set_dynsym_index(-1U);
1869 else if (!sym->has_dynsym_index())
1871 sym->set_dynsym_index(index);
1873 syms->push_back(sym);
1874 dynpool->add(sym->name(), false, NULL);
1876 // Record any version information.
1877 if (sym->version() != NULL)
1878 versions->record_version(this, dynpool, sym);
1882 // Finish up the versions. In some cases this may add new dynamic
1884 index = versions->finalize(this, index, syms);
1889 // Set the final values for all the symbols. The index of the first
1890 // global symbol in the output file is *PLOCAL_SYMCOUNT. Record the
1891 // file offset OFF. Add their names to POOL. Return the new file
1892 // offset. Update *PLOCAL_SYMCOUNT if necessary.
1895 Symbol_table::finalize(off_t off, off_t dynoff, size_t dyn_global_index,
1896 size_t dyncount, Stringpool* pool,
1897 unsigned int *plocal_symcount)
1901 gold_assert(*plocal_symcount != 0);
1902 this->first_global_index_ = *plocal_symcount;
1904 this->dynamic_offset_ = dynoff;
1905 this->first_dynamic_global_index_ = dyn_global_index;
1906 this->dynamic_count_ = dyncount;
1908 if (parameters->target().get_size() == 32)
1910 #if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_32_LITTLE)
1911 ret = this->sized_finalize<32>(off, pool, plocal_symcount);
1916 else if (parameters->target().get_size() == 64)
1918 #if defined(HAVE_TARGET_64_BIG) || defined(HAVE_TARGET_64_LITTLE)
1919 ret = this->sized_finalize<64>(off, pool, plocal_symcount);
1927 // Now that we have the final symbol table, we can reliably note
1928 // which symbols should get warnings.
1929 this->warnings_.note_warnings(this);
1934 // SYM is going into the symbol table at *PINDEX. Add the name to
1935 // POOL, update *PINDEX and *POFF.
1939 Symbol_table::add_to_final_symtab(Symbol* sym, Stringpool* pool,
1940 unsigned int* pindex, off_t* poff)
1942 sym->set_symtab_index(*pindex);
1943 pool->add(sym->name(), false, NULL);
1945 *poff += elfcpp::Elf_sizes<size>::sym_size;
1948 // Set the final value for all the symbols. This is called after
1949 // Layout::finalize, so all the output sections have their final
1954 Symbol_table::sized_finalize(off_t off, Stringpool* pool,
1955 unsigned int* plocal_symcount)
1957 off = align_address(off, size >> 3);
1958 this->offset_ = off;
1960 unsigned int index = *plocal_symcount;
1961 const unsigned int orig_index = index;
1963 // First do all the symbols which have been forced to be local, as
1964 // they must appear before all global symbols.
1965 for (Forced_locals::iterator p = this->forced_locals_.begin();
1966 p != this->forced_locals_.end();
1970 gold_assert(sym->is_forced_local());
1971 if (this->sized_finalize_symbol<size>(sym))
1973 this->add_to_final_symtab<size>(sym, pool, &index, &off);
1978 // Now do all the remaining symbols.
1979 for (Symbol_table_type::iterator p = this->table_.begin();
1980 p != this->table_.end();
1983 Symbol* sym = p->second;
1984 if (this->sized_finalize_symbol<size>(sym))
1985 this->add_to_final_symtab<size>(sym, pool, &index, &off);
1988 this->output_count_ = index - orig_index;
1993 // Finalize the symbol SYM. This returns true if the symbol should be
1994 // added to the symbol table, false otherwise.
1998 Symbol_table::sized_finalize_symbol(Symbol* unsized_sym)
2000 typedef typename Sized_symbol<size>::Value_type Value_type;
2002 Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(unsized_sym);
2004 // The default version of a symbol may appear twice in the symbol
2005 // table. We only need to finalize it once.
2006 if (sym->has_symtab_index())
2011 gold_assert(!sym->has_symtab_index());
2012 sym->set_symtab_index(-1U);
2013 gold_assert(sym->dynsym_index() == -1U);
2019 switch (sym->source())
2021 case Symbol::FROM_OBJECT:
2024 unsigned int shndx = sym->shndx(&is_ordinary);
2026 // FIXME: We need some target specific support here.
2028 && shndx != elfcpp::SHN_ABS
2029 && shndx != elfcpp::SHN_COMMON)
2031 gold_error(_("%s: unsupported symbol section 0x%x"),
2032 sym->demangled_name().c_str(), shndx);
2033 shndx = elfcpp::SHN_UNDEF;
2036 Object* symobj = sym->object();
2037 if (symobj->is_dynamic())
2040 shndx = elfcpp::SHN_UNDEF;
2042 else if (shndx == elfcpp::SHN_UNDEF)
2044 else if (!is_ordinary
2045 && (shndx == elfcpp::SHN_ABS || shndx == elfcpp::SHN_COMMON))
2046 value = sym->value();
2049 Relobj* relobj = static_cast<Relobj*>(symobj);
2050 Output_section* os = relobj->output_section(shndx);
2054 sym->set_symtab_index(-1U);
2055 gold_assert(sym->dynsym_index() == -1U);
2059 uint64_t secoff64 = relobj->output_section_offset(shndx);
2060 Value_type secoff = convert_types<Value_type, uint64_t>(secoff64);
2061 if (sym->type() == elfcpp::STT_TLS)
2062 value = sym->value() + os->tls_offset() + secoff;
2064 value = sym->value() + os->address() + secoff;
2069 case Symbol::IN_OUTPUT_DATA:
2071 Output_data* od = sym->output_data();
2072 value = sym->value();
2073 if (sym->type() != elfcpp::STT_TLS)
2074 value += od->address();
2077 Output_section* os = od->output_section();
2078 gold_assert(os != NULL);
2079 value += os->tls_offset() + (od->address() - os->address());
2081 if (sym->offset_is_from_end())
2082 value += od->data_size();
2086 case Symbol::IN_OUTPUT_SEGMENT:
2088 Output_segment* os = sym->output_segment();
2089 value = sym->value();
2090 if (sym->type() != elfcpp::STT_TLS)
2091 value += os->vaddr();
2092 switch (sym->offset_base())
2094 case Symbol::SEGMENT_START:
2096 case Symbol::SEGMENT_END:
2097 value += os->memsz();
2099 case Symbol::SEGMENT_BSS:
2100 value += os->filesz();
2108 case Symbol::IS_CONSTANT:
2109 value = sym->value();
2112 case Symbol::IS_UNDEFINED:
2120 sym->set_value(value);
2122 if (parameters->options().strip_all())
2124 sym->set_symtab_index(-1U);
2131 // Write out the global symbols.
2134 Symbol_table::write_globals(const Input_objects* input_objects,
2135 const Stringpool* sympool,
2136 const Stringpool* dynpool,
2137 Output_symtab_xindex* symtab_xindex,
2138 Output_symtab_xindex* dynsym_xindex,
2139 Output_file* of) const
2141 switch (parameters->size_and_endianness())
2143 #ifdef HAVE_TARGET_32_LITTLE
2144 case Parameters::TARGET_32_LITTLE:
2145 this->sized_write_globals<32, false>(input_objects, sympool,
2146 dynpool, symtab_xindex,
2150 #ifdef HAVE_TARGET_32_BIG
2151 case Parameters::TARGET_32_BIG:
2152 this->sized_write_globals<32, true>(input_objects, sympool,
2153 dynpool, symtab_xindex,
2157 #ifdef HAVE_TARGET_64_LITTLE
2158 case Parameters::TARGET_64_LITTLE:
2159 this->sized_write_globals<64, false>(input_objects, sympool,
2160 dynpool, symtab_xindex,
2164 #ifdef HAVE_TARGET_64_BIG
2165 case Parameters::TARGET_64_BIG:
2166 this->sized_write_globals<64, true>(input_objects, sympool,
2167 dynpool, symtab_xindex,
2176 // Write out the global symbols.
2178 template<int size, bool big_endian>
2180 Symbol_table::sized_write_globals(const Input_objects* input_objects,
2181 const Stringpool* sympool,
2182 const Stringpool* dynpool,
2183 Output_symtab_xindex* symtab_xindex,
2184 Output_symtab_xindex* dynsym_xindex,
2185 Output_file* of) const
2187 const Target& target = parameters->target();
2189 const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
2191 const unsigned int output_count = this->output_count_;
2192 const section_size_type oview_size = output_count * sym_size;
2193 const unsigned int first_global_index = this->first_global_index_;
2194 unsigned char* psyms;
2195 if (this->offset_ == 0 || output_count == 0)
2198 psyms = of->get_output_view(this->offset_, oview_size);
2200 const unsigned int dynamic_count = this->dynamic_count_;
2201 const section_size_type dynamic_size = dynamic_count * sym_size;
2202 const unsigned int first_dynamic_global_index =
2203 this->first_dynamic_global_index_;
2204 unsigned char* dynamic_view;
2205 if (this->dynamic_offset_ == 0 || dynamic_count == 0)
2206 dynamic_view = NULL;
2208 dynamic_view = of->get_output_view(this->dynamic_offset_, dynamic_size);
2210 for (Symbol_table_type::const_iterator p = this->table_.begin();
2211 p != this->table_.end();
2214 Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(p->second);
2216 // Possibly warn about unresolved symbols in shared libraries.
2217 this->warn_about_undefined_dynobj_symbol(input_objects, sym);
2219 unsigned int sym_index = sym->symtab_index();
2220 unsigned int dynsym_index;
2221 if (dynamic_view == NULL)
2224 dynsym_index = sym->dynsym_index();
2226 if (sym_index == -1U && dynsym_index == -1U)
2228 // This symbol is not included in the output file.
2233 typename elfcpp::Elf_types<size>::Elf_Addr sym_value = sym->value();
2234 typename elfcpp::Elf_types<size>::Elf_Addr dynsym_value = sym_value;
2235 switch (sym->source())
2237 case Symbol::FROM_OBJECT:
2240 unsigned int in_shndx = sym->shndx(&is_ordinary);
2242 // FIXME: We need some target specific support here.
2244 && in_shndx != elfcpp::SHN_ABS
2245 && in_shndx != elfcpp::SHN_COMMON)
2247 gold_error(_("%s: unsupported symbol section 0x%x"),
2248 sym->demangled_name().c_str(), in_shndx);
2253 Object* symobj = sym->object();
2254 if (symobj->is_dynamic())
2256 if (sym->needs_dynsym_value())
2257 dynsym_value = target.dynsym_value(sym);
2258 shndx = elfcpp::SHN_UNDEF;
2260 else if (in_shndx == elfcpp::SHN_UNDEF
2262 && (in_shndx == elfcpp::SHN_ABS
2263 || in_shndx == elfcpp::SHN_COMMON)))
2267 Relobj* relobj = static_cast<Relobj*>(symobj);
2268 Output_section* os = relobj->output_section(in_shndx);
2269 gold_assert(os != NULL);
2270 shndx = os->out_shndx();
2272 if (shndx >= elfcpp::SHN_LORESERVE)
2274 if (sym_index != -1U)
2275 symtab_xindex->add(sym_index, shndx);
2276 if (dynsym_index != -1U)
2277 dynsym_xindex->add(dynsym_index, shndx);
2278 shndx = elfcpp::SHN_XINDEX;
2281 // In object files symbol values are section
2283 if (parameters->options().relocatable())
2284 sym_value -= os->address();
2290 case Symbol::IN_OUTPUT_DATA:
2291 shndx = sym->output_data()->out_shndx();
2292 if (shndx >= elfcpp::SHN_LORESERVE)
2294 if (sym_index != -1U)
2295 symtab_xindex->add(sym_index, shndx);
2296 if (dynsym_index != -1U)
2297 dynsym_xindex->add(dynsym_index, shndx);
2298 shndx = elfcpp::SHN_XINDEX;
2302 case Symbol::IN_OUTPUT_SEGMENT:
2303 shndx = elfcpp::SHN_ABS;
2306 case Symbol::IS_CONSTANT:
2307 shndx = elfcpp::SHN_ABS;
2310 case Symbol::IS_UNDEFINED:
2311 shndx = elfcpp::SHN_UNDEF;
2318 if (sym_index != -1U)
2320 sym_index -= first_global_index;
2321 gold_assert(sym_index < output_count);
2322 unsigned char* ps = psyms + (sym_index * sym_size);
2323 this->sized_write_symbol<size, big_endian>(sym, sym_value, shndx,
2327 if (dynsym_index != -1U)
2329 dynsym_index -= first_dynamic_global_index;
2330 gold_assert(dynsym_index < dynamic_count);
2331 unsigned char* pd = dynamic_view + (dynsym_index * sym_size);
2332 this->sized_write_symbol<size, big_endian>(sym, dynsym_value, shndx,
2337 of->write_output_view(this->offset_, oview_size, psyms);
2338 if (dynamic_view != NULL)
2339 of->write_output_view(this->dynamic_offset_, dynamic_size, dynamic_view);
2342 // Write out the symbol SYM, in section SHNDX, to P. POOL is the
2343 // strtab holding the name.
2345 template<int size, bool big_endian>
2347 Symbol_table::sized_write_symbol(
2348 Sized_symbol<size>* sym,
2349 typename elfcpp::Elf_types<size>::Elf_Addr value,
2351 const Stringpool* pool,
2352 unsigned char* p) const
2354 elfcpp::Sym_write<size, big_endian> osym(p);
2355 osym.put_st_name(pool->get_offset(sym->name()));
2356 osym.put_st_value(value);
2357 // Use a symbol size of zero for undefined symbols.
2358 osym.put_st_size(shndx == elfcpp::SHN_UNDEF ? 0 : sym->symsize());
2359 // A version script may have overridden the default binding.
2360 if (sym->is_forced_local())
2361 osym.put_st_info(elfcpp::elf_st_info(elfcpp::STB_LOCAL, sym->type()));
2363 osym.put_st_info(elfcpp::elf_st_info(sym->binding(), sym->type()));
2364 osym.put_st_other(elfcpp::elf_st_other(sym->visibility(), sym->nonvis()));
2365 osym.put_st_shndx(shndx);
2368 // Check for unresolved symbols in shared libraries. This is
2369 // controlled by the --allow-shlib-undefined option.
2371 // We only warn about libraries for which we have seen all the
2372 // DT_NEEDED entries. We don't try to track down DT_NEEDED entries
2373 // which were not seen in this link. If we didn't see a DT_NEEDED
2374 // entry, we aren't going to be able to reliably report whether the
2375 // symbol is undefined.
2377 // We also don't warn about libraries found in the system library
2378 // directory (the directory were we find libc.so); we assume that
2379 // those libraries are OK. This heuristic avoids problems in
2380 // GNU/Linux, in which -ldl can have undefined references satisfied by
2384 Symbol_table::warn_about_undefined_dynobj_symbol(
2385 const Input_objects* input_objects,
2389 if (sym->source() == Symbol::FROM_OBJECT
2390 && sym->object()->is_dynamic()
2391 && sym->shndx(&dummy) == elfcpp::SHN_UNDEF
2392 && sym->binding() != elfcpp::STB_WEAK
2393 && !parameters->options().allow_shlib_undefined()
2394 && !parameters->target().is_defined_by_abi(sym)
2395 && !input_objects->found_in_system_library_directory(sym->object()))
2397 // A very ugly cast.
2398 Dynobj* dynobj = static_cast<Dynobj*>(sym->object());
2399 if (!dynobj->has_unknown_needed_entries())
2402 gold_error(_("%s: undefined reference to '%s', version '%s'"),
2403 sym->object()->name().c_str(),
2404 sym->demangled_name().c_str(),
2407 gold_error(_("%s: undefined reference to '%s'"),
2408 sym->object()->name().c_str(),
2409 sym->demangled_name().c_str());
2414 // Write out a section symbol. Return the update offset.
2417 Symbol_table::write_section_symbol(const Output_section *os,
2418 Output_symtab_xindex* symtab_xindex,
2422 switch (parameters->size_and_endianness())
2424 #ifdef HAVE_TARGET_32_LITTLE
2425 case Parameters::TARGET_32_LITTLE:
2426 this->sized_write_section_symbol<32, false>(os, symtab_xindex, of,
2430 #ifdef HAVE_TARGET_32_BIG
2431 case Parameters::TARGET_32_BIG:
2432 this->sized_write_section_symbol<32, true>(os, symtab_xindex, of,
2436 #ifdef HAVE_TARGET_64_LITTLE
2437 case Parameters::TARGET_64_LITTLE:
2438 this->sized_write_section_symbol<64, false>(os, symtab_xindex, of,
2442 #ifdef HAVE_TARGET_64_BIG
2443 case Parameters::TARGET_64_BIG:
2444 this->sized_write_section_symbol<64, true>(os, symtab_xindex, of,
2453 // Write out a section symbol, specialized for size and endianness.
2455 template<int size, bool big_endian>
2457 Symbol_table::sized_write_section_symbol(const Output_section* os,
2458 Output_symtab_xindex* symtab_xindex,
2462 const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
2464 unsigned char* pov = of->get_output_view(offset, sym_size);
2466 elfcpp::Sym_write<size, big_endian> osym(pov);
2467 osym.put_st_name(0);
2468 osym.put_st_value(os->address());
2469 osym.put_st_size(0);
2470 osym.put_st_info(elfcpp::elf_st_info(elfcpp::STB_LOCAL,
2471 elfcpp::STT_SECTION));
2472 osym.put_st_other(elfcpp::elf_st_other(elfcpp::STV_DEFAULT, 0));
2474 unsigned int shndx = os->out_shndx();
2475 if (shndx >= elfcpp::SHN_LORESERVE)
2477 symtab_xindex->add(os->symtab_index(), shndx);
2478 shndx = elfcpp::SHN_XINDEX;
2480 osym.put_st_shndx(shndx);
2482 of->write_output_view(offset, sym_size, pov);
2485 // Print statistical information to stderr. This is used for --stats.
2488 Symbol_table::print_stats() const
2490 #if defined(HAVE_TR1_UNORDERED_MAP) || defined(HAVE_EXT_HASH_MAP)
2491 fprintf(stderr, _("%s: symbol table entries: %zu; buckets: %zu\n"),
2492 program_name, this->table_.size(), this->table_.bucket_count());
2494 fprintf(stderr, _("%s: symbol table entries: %zu\n"),
2495 program_name, this->table_.size());
2497 this->namepool_.print_stats("symbol table stringpool");
2500 // We check for ODR violations by looking for symbols with the same
2501 // name for which the debugging information reports that they were
2502 // defined in different source locations. When comparing the source
2503 // location, we consider instances with the same base filename and
2504 // line number to be the same. This is because different object
2505 // files/shared libraries can include the same header file using
2506 // different paths, and we don't want to report an ODR violation in
2509 // This struct is used to compare line information, as returned by
2510 // Dwarf_line_info::one_addr2line. It implements a < comparison
2511 // operator used with std::set.
2513 struct Odr_violation_compare
2516 operator()(const std::string& s1, const std::string& s2) const
2518 std::string::size_type pos1 = s1.rfind('/');
2519 std::string::size_type pos2 = s2.rfind('/');
2520 if (pos1 == std::string::npos
2521 || pos2 == std::string::npos)
2523 return s1.compare(pos1, std::string::npos,
2524 s2, pos2, std::string::npos) < 0;
2528 // Check candidate_odr_violations_ to find symbols with the same name
2529 // but apparently different definitions (different source-file/line-no).
2532 Symbol_table::detect_odr_violations(const Task* task,
2533 const char* output_file_name) const
2535 for (Odr_map::const_iterator it = candidate_odr_violations_.begin();
2536 it != candidate_odr_violations_.end();
2539 const char* symbol_name = it->first;
2540 // We use a sorted set so the output is deterministic.
2541 std::set<std::string, Odr_violation_compare> line_nums;
2543 for (Unordered_set<Symbol_location, Symbol_location_hash>::const_iterator
2544 locs = it->second.begin();
2545 locs != it->second.end();
2548 // We need to lock the object in order to read it. This
2549 // means that we have to run in a singleton Task. If we
2550 // want to run this in a general Task for better
2551 // performance, we will need one Task for object, plus
2552 // appropriate locking to ensure that we don't conflict with
2553 // other uses of the object. Also note, one_addr2line is not
2554 // currently thread-safe.
2555 Task_lock_obj<Object> tl(task, locs->object);
2556 // 16 is the size of the object-cache that one_addr2line should use.
2557 std::string lineno = Dwarf_line_info::one_addr2line(
2558 locs->object, locs->shndx, locs->offset, 16);
2559 if (!lineno.empty())
2560 line_nums.insert(lineno);
2563 if (line_nums.size() > 1)
2565 gold_warning(_("while linking %s: symbol '%s' defined in multiple "
2566 "places (possible ODR violation):"),
2567 output_file_name, demangle(symbol_name).c_str());
2568 for (std::set<std::string>::const_iterator it2 = line_nums.begin();
2569 it2 != line_nums.end();
2571 fprintf(stderr, " %s\n", it2->c_str());
2574 // We only call one_addr2line() in this function, so we can clear its cache.
2575 Dwarf_line_info::clear_addr2line_cache();
2578 // Warnings functions.
2580 // Add a new warning.
2583 Warnings::add_warning(Symbol_table* symtab, const char* name, Object* obj,
2584 const std::string& warning)
2586 name = symtab->canonicalize_name(name);
2587 this->warnings_[name].set(obj, warning);
2590 // Look through the warnings and mark the symbols for which we should
2591 // warn. This is called during Layout::finalize when we know the
2592 // sources for all the symbols.
2595 Warnings::note_warnings(Symbol_table* symtab)
2597 for (Warning_table::iterator p = this->warnings_.begin();
2598 p != this->warnings_.end();
2601 Symbol* sym = symtab->lookup(p->first, NULL);
2603 && sym->source() == Symbol::FROM_OBJECT
2604 && sym->object() == p->second.object)
2605 sym->set_has_warning();
2609 // Issue a warning. This is called when we see a relocation against a
2610 // symbol for which has a warning.
2612 template<int size, bool big_endian>
2614 Warnings::issue_warning(const Symbol* sym,
2615 const Relocate_info<size, big_endian>* relinfo,
2616 size_t relnum, off_t reloffset) const
2618 gold_assert(sym->has_warning());
2619 Warning_table::const_iterator p = this->warnings_.find(sym->name());
2620 gold_assert(p != this->warnings_.end());
2621 gold_warning_at_location(relinfo, relnum, reloffset,
2622 "%s", p->second.text.c_str());
2625 // Instantiate the templates we need. We could use the configure
2626 // script to restrict this to only the ones needed for implemented
2629 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
2632 Sized_symbol<32>::allocate_common(Output_data*, Value_type);
2635 #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
2638 Sized_symbol<64>::allocate_common(Output_data*, Value_type);
2641 #ifdef HAVE_TARGET_32_LITTLE
2644 Symbol_table::add_from_relobj<32, false>(
2645 Sized_relobj<32, false>* relobj,
2646 const unsigned char* syms,
2648 size_t symndx_offset,
2649 const char* sym_names,
2650 size_t sym_name_size,
2651 Sized_relobj<32, true>::Symbols* sympointers,
2655 #ifdef HAVE_TARGET_32_BIG
2658 Symbol_table::add_from_relobj<32, true>(
2659 Sized_relobj<32, true>* relobj,
2660 const unsigned char* syms,
2662 size_t symndx_offset,
2663 const char* sym_names,
2664 size_t sym_name_size,
2665 Sized_relobj<32, false>::Symbols* sympointers,
2669 #ifdef HAVE_TARGET_64_LITTLE
2672 Symbol_table::add_from_relobj<64, false>(
2673 Sized_relobj<64, false>* relobj,
2674 const unsigned char* syms,
2676 size_t symndx_offset,
2677 const char* sym_names,
2678 size_t sym_name_size,
2679 Sized_relobj<64, true>::Symbols* sympointers,
2683 #ifdef HAVE_TARGET_64_BIG
2686 Symbol_table::add_from_relobj<64, true>(
2687 Sized_relobj<64, true>* relobj,
2688 const unsigned char* syms,
2690 size_t symndx_offset,
2691 const char* sym_names,
2692 size_t sym_name_size,
2693 Sized_relobj<64, false>::Symbols* sympointers,
2697 #ifdef HAVE_TARGET_32_LITTLE
2700 Symbol_table::add_from_dynobj<32, false>(
2701 Sized_dynobj<32, false>* dynobj,
2702 const unsigned char* syms,
2704 const char* sym_names,
2705 size_t sym_name_size,
2706 const unsigned char* versym,
2708 const std::vector<const char*>* version_map,
2709 Sized_relobj<32, false>::Symbols* sympointers,
2713 #ifdef HAVE_TARGET_32_BIG
2716 Symbol_table::add_from_dynobj<32, true>(
2717 Sized_dynobj<32, true>* dynobj,
2718 const unsigned char* syms,
2720 const char* sym_names,
2721 size_t sym_name_size,
2722 const unsigned char* versym,
2724 const std::vector<const char*>* version_map,
2725 Sized_relobj<32, true>::Symbols* sympointers,
2729 #ifdef HAVE_TARGET_64_LITTLE
2732 Symbol_table::add_from_dynobj<64, false>(
2733 Sized_dynobj<64, false>* dynobj,
2734 const unsigned char* syms,
2736 const char* sym_names,
2737 size_t sym_name_size,
2738 const unsigned char* versym,
2740 const std::vector<const char*>* version_map,
2741 Sized_relobj<64, false>::Symbols* sympointers,
2745 #ifdef HAVE_TARGET_64_BIG
2748 Symbol_table::add_from_dynobj<64, true>(
2749 Sized_dynobj<64, true>* dynobj,
2750 const unsigned char* syms,
2752 const char* sym_names,
2753 size_t sym_name_size,
2754 const unsigned char* versym,
2756 const std::vector<const char*>* version_map,
2757 Sized_relobj<64, true>::Symbols* sympointers,
2761 #if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
2764 Symbol_table::define_with_copy_reloc<32>(
2765 Sized_symbol<32>* sym,
2767 elfcpp::Elf_types<32>::Elf_Addr value);
2770 #if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
2773 Symbol_table::define_with_copy_reloc<64>(
2774 Sized_symbol<64>* sym,
2776 elfcpp::Elf_types<64>::Elf_Addr value);
2779 #ifdef HAVE_TARGET_32_LITTLE
2782 Warnings::issue_warning<32, false>(const Symbol* sym,
2783 const Relocate_info<32, false>* relinfo,
2784 size_t relnum, off_t reloffset) const;
2787 #ifdef HAVE_TARGET_32_BIG
2790 Warnings::issue_warning<32, true>(const Symbol* sym,
2791 const Relocate_info<32, true>* relinfo,
2792 size_t relnum, off_t reloffset) const;
2795 #ifdef HAVE_TARGET_64_LITTLE
2798 Warnings::issue_warning<64, false>(const Symbol* sym,
2799 const Relocate_info<64, false>* relinfo,
2800 size_t relnum, off_t reloffset) const;
2803 #ifdef HAVE_TARGET_64_BIG
2806 Warnings::issue_warning<64, true>(const Symbol* sym,
2807 const Relocate_info<64, true>* relinfo,
2808 size_t relnum, off_t reloffset) const;
2811 } // End namespace gold.