// symtab.cc -- the gold symbol table
+// Copyright 2006, 2007 Free Software Foundation, Inc.
+// Written by Ian Lance Taylor <iant@google.com>.
+
+// This file is part of gold.
+
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+// MA 02110-1301, USA.
+
#include "gold.h"
-#include <cassert>
#include <stdint.h>
#include <string>
#include <utility>
#include "object.h"
+#include "dynobj.h"
+#include "output.h"
+#include "target.h"
+#include "workqueue.h"
#include "symtab.h"
namespace gold
// Class Symbol.
-// Initialize the fields in the base class Symbol.
+// Initialize fields in Symbol. This initializes everything except u_
+// and source_.
-template<int size, bool big_endian>
void
-Symbol::init_base(const char* name, const char* version, Object* object,
- const elfcpp::Sym<size, big_endian>& sym)
+Symbol::init_fields(const char* name, const char* version,
+ elfcpp::STT type, elfcpp::STB binding,
+ elfcpp::STV visibility, unsigned char nonvis)
{
this->name_ = name;
this->version_ = version;
- this->object_ = object;
- this->shnum_ = sym.get_st_shndx(); // FIXME: Handle SHN_XINDEX.
- this->type_ = sym.get_st_type();
- this->binding_ = sym.get_st_bind();
- this->visibility_ = sym.get_st_visibility();
- this->other_ = sym.get_st_nonvis();
- this->is_special_ = false;
+ this->symtab_index_ = 0;
+ this->dynsym_index_ = 0;
+ this->got_offset_ = 0;
+ this->plt_offset_ = 0;
+ this->type_ = type;
+ this->binding_ = binding;
+ this->visibility_ = visibility;
+ this->nonvis_ = nonvis;
+ this->is_target_special_ = false;
this->is_def_ = false;
this->is_forwarder_ = false;
+ this->needs_dynsym_entry_ = false;
+ this->in_reg_ = false;
+ this->in_dyn_ = false;
+ this->has_got_offset_ = false;
+ this->has_plt_offset_ = false;
+ this->has_warning_ = false;
+}
+
+// Initialize the fields in the base class Symbol for SYM in OBJECT.
+
+template<int size, bool big_endian>
+void
+Symbol::init_base(const char* name, const char* version, Object* object,
+ const elfcpp::Sym<size, big_endian>& sym)
+{
+ this->init_fields(name, version, sym.get_st_type(), sym.get_st_bind(),
+ sym.get_st_visibility(), sym.get_st_nonvis());
+ this->u_.from_object.object = object;
+ // FIXME: Handle SHN_XINDEX.
+ this->u_.from_object.shndx = sym.get_st_shndx();
+ this->source_ = FROM_OBJECT;
+ this->in_reg_ = !object->is_dynamic();
this->in_dyn_ = object->is_dynamic();
}
-// Initialize the fields in Sized_symbol.
+// Initialize the fields in the base class Symbol for a symbol defined
+// in an Output_data.
+
+void
+Symbol::init_base(const char* name, Output_data* od, elfcpp::STT type,
+ elfcpp::STB binding, elfcpp::STV visibility,
+ unsigned char nonvis, bool offset_is_from_end)
+{
+ this->init_fields(name, NULL, type, binding, visibility, nonvis);
+ this->u_.in_output_data.output_data = od;
+ this->u_.in_output_data.offset_is_from_end = offset_is_from_end;
+ this->source_ = IN_OUTPUT_DATA;
+ this->in_reg_ = true;
+}
+
+// Initialize the fields in the base class Symbol for a symbol defined
+// in an Output_segment.
+
+void
+Symbol::init_base(const char* name, Output_segment* os, elfcpp::STT type,
+ elfcpp::STB binding, elfcpp::STV visibility,
+ unsigned char nonvis, Segment_offset_base offset_base)
+{
+ this->init_fields(name, NULL, type, binding, visibility, nonvis);
+ this->u_.in_output_segment.output_segment = os;
+ this->u_.in_output_segment.offset_base = offset_base;
+ this->source_ = IN_OUTPUT_SEGMENT;
+ this->in_reg_ = true;
+}
+
+// Initialize the fields in the base class Symbol for a symbol defined
+// as a constant.
+
+void
+Symbol::init_base(const char* name, elfcpp::STT type,
+ elfcpp::STB binding, elfcpp::STV visibility,
+ unsigned char nonvis)
+{
+ this->init_fields(name, NULL, type, binding, visibility, nonvis);
+ this->source_ = CONSTANT;
+ this->in_reg_ = true;
+}
+
+// Initialize the fields in Sized_symbol for SYM in OBJECT.
template<int size>
template<bool big_endian>
{
this->init_base(name, version, object, sym);
this->value_ = sym.get_st_value();
- this->size_ = sym.get_st_size();
+ this->symsize_ = sym.get_st_size();
+}
+
+// Initialize the fields in Sized_symbol for a symbol defined in an
+// Output_data.
+
+template<int size>
+void
+Sized_symbol<size>::init(const char* name, Output_data* od,
+ Value_type value, Size_type symsize,
+ elfcpp::STT type, elfcpp::STB binding,
+ elfcpp::STV visibility, unsigned char nonvis,
+ bool offset_is_from_end)
+{
+ this->init_base(name, od, type, binding, visibility, nonvis,
+ offset_is_from_end);
+ this->value_ = value;
+ this->symsize_ = symsize;
+}
+
+// Initialize the fields in Sized_symbol for a symbol defined in an
+// Output_segment.
+
+template<int size>
+void
+Sized_symbol<size>::init(const char* name, Output_segment* os,
+ Value_type value, Size_type symsize,
+ elfcpp::STT type, elfcpp::STB binding,
+ elfcpp::STV visibility, unsigned char nonvis,
+ Segment_offset_base offset_base)
+{
+ this->init_base(name, os, type, binding, visibility, nonvis, offset_base);
+ this->value_ = value;
+ this->symsize_ = symsize;
+}
+
+// Initialize the fields in Sized_symbol for a symbol defined as a
+// constant.
+
+template<int size>
+void
+Sized_symbol<size>::init(const char* name, Value_type value, Size_type symsize,
+ elfcpp::STT type, elfcpp::STB binding,
+ elfcpp::STV visibility, unsigned char nonvis)
+{
+ this->init_base(name, type, binding, visibility, nonvis);
+ this->value_ = value;
+ this->symsize_ = symsize;
}
// Class Symbol_table.
Symbol_table::Symbol_table()
- : size_(0), table_(), namepool_(), forwarders_()
+ : size_(0), saw_undefined_(0), offset_(0), table_(), namepool_(),
+ forwarders_(), commons_(), warnings_()
{
}
size_t
Symbol_table::Symbol_table_hash::operator()(const Symbol_table_key& key) const
{
- return (reinterpret_cast<size_t>(key.first)
- ^ reinterpret_cast<size_t>(key.second));
+ return key.first ^ key.second;
}
// The symbol table key equality function. This is only called with
void
Symbol_table::make_forwarder(Symbol* from, Symbol* to)
{
- assert(!from->is_forwarder() && !to->is_forwarder());
+ gold_assert(from != to);
+ gold_assert(!from->is_forwarder() && !to->is_forwarder());
this->forwarders_[from] = to;
from->set_forwarder();
}
+// Resolve the forwards from FROM, returning the real symbol.
+
Symbol*
-Symbol_table::resolve_forwards(Symbol* from) const
+Symbol_table::resolve_forwards(const Symbol* from) const
{
- assert(from->is_forwarder());
- Unordered_map<Symbol*, Symbol*>::const_iterator p =
+ gold_assert(from->is_forwarder());
+ Unordered_map<const Symbol*, Symbol*>::const_iterator p =
this->forwarders_.find(from);
- assert(p != this->forwarders_.end());
+ gold_assert(p != this->forwarders_.end());
+ return p->second;
+}
+
+// Look up a symbol by name.
+
+Symbol*
+Symbol_table::lookup(const char* name, const char* version) const
+{
+ Stringpool::Key name_key;
+ name = this->namepool_.find(name, &name_key);
+ if (name == NULL)
+ return NULL;
+
+ Stringpool::Key version_key = 0;
+ if (version != NULL)
+ {
+ version = this->namepool_.find(version, &version_key);
+ if (version == NULL)
+ return NULL;
+ }
+
+ Symbol_table_key key(name_key, version_key);
+ Symbol_table::Symbol_table_type::const_iterator p = this->table_.find(key);
+ if (p == this->table_.end())
+ return NULL;
return p->second;
}
template<int size, bool big_endian>
void
-Symbol_table::resolve(Sized_symbol<size>* to, const Sized_symbol<size>* from)
+Symbol_table::resolve(Sized_symbol<size>* to, const Sized_symbol<size>* from,
+ const char* version ACCEPT_SIZE_ENDIAN)
{
unsigned char buf[elfcpp::Elf_sizes<size>::sym_size];
elfcpp::Sym_write<size, big_endian> esym(buf);
esym.put_st_value(from->value());
esym.put_st_size(from->symsize());
esym.put_st_info(from->binding(), from->type());
- esym.put_st_other(from->visibility(), from->other());
- esym.put_st_shndx(from->shnum());
- Symbol_table::resolve(to, esym.sym(), from->object());
+ esym.put_st_other(from->visibility(), from->nonvis());
+ esym.put_st_shndx(from->shndx());
+ Symbol_table::resolve(to, esym.sym(), from->object(), version);
+ if (from->in_reg())
+ to->set_in_reg();
+ if (from->in_dyn())
+ to->set_in_dyn();
}
// Add one symbol from OBJECT to the symbol table. NAME is symbol
template<int size, bool big_endian>
Symbol*
-Symbol_table::add_from_object(Sized_object<size, big_endian>* object,
+Symbol_table::add_from_object(Object* object,
const char *name,
- const char *version, bool def,
+ Stringpool::Key name_key,
+ const char *version,
+ Stringpool::Key version_key,
+ bool def,
const elfcpp::Sym<size, big_endian>& sym)
{
Symbol* const snull = NULL;
std::pair<typename Symbol_table_type::iterator, bool> ins =
- this->table_.insert(std::make_pair(std::make_pair(name, version), snull));
+ this->table_.insert(std::make_pair(std::make_pair(name_key, version_key),
+ snull));
std::pair<typename Symbol_table_type::iterator, bool> insdef =
std::make_pair(this->table_.end(), false);
if (def)
{
- const char* const vnull = NULL;
- insdef = this->table_.insert(std::make_pair(std::make_pair(name, vnull),
+ const Stringpool::Key vnull_key = 0;
+ insdef = this->table_.insert(std::make_pair(std::make_pair(name_key,
+ vnull_key),
snull));
}
// ins.second: true if new entry was inserted, false if not.
Sized_symbol<size>* ret;
+ bool was_undefined;
+ bool was_common;
if (!ins.second)
{
// We already have an entry for NAME/VERSION.
- ret = this->get_sized_symbol<size>(ins.first->second);
- assert(ret != NULL);
- Symbol_table::resolve(ret, sym, object);
+ ret = this->get_sized_symbol SELECT_SIZE_NAME(size) (ins.first->second
+ SELECT_SIZE(size));
+ gold_assert(ret != NULL);
+
+ was_undefined = ret->is_undefined();
+ was_common = ret->is_common();
+
+ Symbol_table::resolve(ret, sym, object, version);
if (def)
{
// NAME/NULL point to NAME/VERSION.
insdef.first->second = ret;
}
- else
+ else if (insdef.first->second != ret)
{
// This is the unfortunate case where we already have
// entries for both NAME/VERSION and NAME/NULL.
- const Sized_symbol<size>* sym2 =
- this->get_sized_symbol<size>(insdef.first->second);
- Symbol_table::resolve<size, big_endian>(ret, sym2);
+ const Sized_symbol<size>* sym2;
+ sym2 = this->get_sized_symbol SELECT_SIZE_NAME(size) (
+ insdef.first->second
+ SELECT_SIZE(size));
+ Symbol_table::resolve SELECT_SIZE_ENDIAN_NAME(size, big_endian) (
+ ret, sym2, version SELECT_SIZE_ENDIAN(size, big_endian));
this->make_forwarder(insdef.first->second, ret);
insdef.first->second = ret;
}
else
{
// This is the first time we have seen NAME/VERSION.
- assert(ins.first->second == NULL);
+ gold_assert(ins.first->second == NULL);
+
+ was_undefined = false;
+ was_common = false;
+
if (def && !insdef.second)
{
- // We already have an entry for NAME/NULL. Make
- // NAME/VERSION point to it.
- ret = this->get_sized_symbol<size>(insdef.first->second);
- Symbol_table::resolve(ret, sym, object);
+ // We already have an entry for NAME/NULL. If we override
+ // it, then change it to NAME/VERSION.
+ ret = this->get_sized_symbol SELECT_SIZE_NAME(size) (
+ insdef.first->second
+ SELECT_SIZE(size));
+ Symbol_table::resolve(ret, sym, object, version);
ins.first->second = ret;
}
else
{
- Sized_target<size, big_endian>* target = object->sized_target();
+ Sized_target<size, big_endian>* target =
+ object->sized_target SELECT_SIZE_ENDIAN_NAME(size, big_endian) (
+ SELECT_SIZE_ENDIAN_ONLY(size, big_endian));
if (!target->has_make_symbol())
ret = new Sized_symbol<size>();
else
{
this->table_.erase(insdef.first);
// Inserting insdef invalidated ins.
- this->table_.erase(std::make_pair(name, version));
+ this->table_.erase(std::make_pair(name_key,
+ version_key));
}
return NULL;
}
{
// This is the first time we have seen NAME/NULL. Point
// it at the new entry for NAME/VERSION.
- assert(insdef.second);
+ gold_assert(insdef.second);
insdef.first->second = ret;
}
}
}
+ // Record every time we see a new undefined symbol, to speed up
+ // archive groups.
+ if (!was_undefined && ret->is_undefined())
+ ++this->saw_undefined_;
+
+ // Keep track of common symbols, to speed up common symbol
+ // allocation.
+ if (!was_common && ret->is_common())
+ this->commons_.push_back(ret);
+
return ret;
}
-// Add all the symbols in an object to the hash table.
+// Add all the symbols in a relocatable object to the hash table.
template<int size, bool big_endian>
void
-Symbol_table::add_from_object(
- Sized_object<size, big_endian>* object,
- const elfcpp::Sym<size, big_endian>* syms,
+Symbol_table::add_from_relobj(
+ Sized_relobj<size, big_endian>* relobj,
+ const unsigned char* syms,
size_t count,
const char* sym_names,
size_t sym_name_size,
if (this->get_size() == 0)
this->set_size(size);
- if (size != this->get_size() || size != object->target()->get_size())
+ if (size != this->get_size() || size != relobj->target()->get_size())
{
fprintf(stderr, _("%s: %s: mixing 32-bit and 64-bit ELF objects\n"),
- program_name, object->name().c_str());
+ program_name, relobj->name().c_str());
gold_exit(false);
}
- const unsigned char* p = reinterpret_cast<const unsigned char*>(syms);
- for (size_t i = 0; i < count; ++i)
+ const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
+
+ const unsigned char* p = syms;
+ for (size_t i = 0; i < count; ++i, p += sym_size)
{
elfcpp::Sym<size, big_endian> sym(p);
+ elfcpp::Sym<size, big_endian>* psym = &sym;
- unsigned int st_name = sym.get_st_name();
+ unsigned int st_name = psym->get_st_name();
if (st_name >= sym_name_size)
{
- fprintf(stderr, _("%s: %s: bad symbol name offset %u at %lu\n"),
- program_name, object->name().c_str(), st_name,
+ fprintf(stderr,
+ _("%s: %s: bad global symbol name offset %u at %lu\n"),
+ program_name, relobj->name().c_str(), st_name,
static_cast<unsigned long>(i));
gold_exit(false);
}
const char* name = sym_names + st_name;
+ // A symbol defined in a section which we are not including must
+ // be treated as an undefined symbol.
+ unsigned char symbuf[sym_size];
+ elfcpp::Sym<size, big_endian> sym2(symbuf);
+ unsigned int st_shndx = psym->get_st_shndx();
+ if (st_shndx != elfcpp::SHN_UNDEF
+ && st_shndx < elfcpp::SHN_LORESERVE
+ && !relobj->is_section_included(st_shndx))
+ {
+ memcpy(symbuf, p, sym_size);
+ elfcpp::Sym_write<size, big_endian> sw(symbuf);
+ sw.put_st_shndx(elfcpp::SHN_UNDEF);
+ psym = &sym2;
+ }
+
// In an object file, an '@' in the name separates the symbol
// name from the version name. If there are two '@' characters,
// this is the default version.
Symbol* res;
if (ver == NULL)
{
- name = this->namepool_.add(name);
- res = this->add_from_object(object, name, NULL, false, sym);
+ Stringpool::Key name_key;
+ name = this->namepool_.add(name, &name_key);
+ res = this->add_from_object(relobj, name, name_key, NULL, 0,
+ false, *psym);
}
else
{
- name = this->namepool_.add(name, ver - name);
+ Stringpool::Key name_key;
+ name = this->namepool_.add(name, ver - name, &name_key);
+
bool def = false;
++ver;
if (*ver == '@')
def = true;
++ver;
}
- ver = this->namepool_.add(ver);
- res = this->add_from_object(object, name, ver, def, sym);
+
+ Stringpool::Key ver_key;
+ ver = this->namepool_.add(ver, &ver_key);
+
+ res = this->add_from_object(relobj, name, name_key, ver, ver_key,
+ def, *psym);
}
*sympointers++ = res;
+ }
+}
- p += elfcpp::Elf_sizes<size>::sym_size;
+// Add all the symbols in a dynamic object to the hash table.
+
+template<int size, bool big_endian>
+void
+Symbol_table::add_from_dynobj(
+ Sized_dynobj<size, big_endian>* dynobj,
+ const unsigned char* syms,
+ size_t count,
+ const char* sym_names,
+ size_t sym_name_size,
+ const unsigned char* versym,
+ size_t versym_size,
+ const std::vector<const char*>* version_map)
+{
+ // We take the size from the first object we see.
+ if (this->get_size() == 0)
+ this->set_size(size);
+
+ if (size != this->get_size() || size != dynobj->target()->get_size())
+ {
+ fprintf(stderr, _("%s: %s: mixing 32-bit and 64-bit ELF objects\n"),
+ program_name, dynobj->name().c_str());
+ gold_exit(false);
+ }
+
+ if (versym != NULL && versym_size / 2 < count)
+ {
+ fprintf(stderr, _("%s: %s: too few symbol versions\n"),
+ program_name, dynobj->name().c_str());
+ gold_exit(false);
}
+
+ const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
+
+ const unsigned char* p = syms;
+ const unsigned char* vs = versym;
+ for (size_t i = 0; i < count; ++i, p += sym_size, vs += 2)
+ {
+ elfcpp::Sym<size, big_endian> sym(p);
+
+ // Ignore symbols with local binding.
+ if (sym.get_st_bind() == elfcpp::STB_LOCAL)
+ continue;
+
+ unsigned int st_name = sym.get_st_name();
+ if (st_name >= sym_name_size)
+ {
+ fprintf(stderr, _("%s: %s: bad symbol name offset %u at %lu\n"),
+ program_name, dynobj->name().c_str(), st_name,
+ static_cast<unsigned long>(i));
+ gold_exit(false);
+ }
+
+ const char* name = sym_names + st_name;
+
+ if (versym == NULL)
+ {
+ Stringpool::Key name_key;
+ name = this->namepool_.add(name, &name_key);
+ this->add_from_object(dynobj, name, name_key, NULL, 0,
+ false, sym);
+ continue;
+ }
+
+ // Read the version information.
+
+ unsigned int v = elfcpp::Swap<16, big_endian>::readval(vs);
+
+ bool hidden = (v & elfcpp::VERSYM_HIDDEN) != 0;
+ v &= elfcpp::VERSYM_VERSION;
+
+ // The Sun documentation says that V can be VER_NDX_LOCAL, or
+ // VER_NDX_GLOBAL, or a version index. The meaning of
+ // VER_NDX_LOCAL is defined as "Symbol has local scope." The
+ // old GNU linker will happily generate VER_NDX_LOCAL for an
+ // undefined symbol. I don't know what the Sun linker will
+ // generate.
+
+ if (v == static_cast<unsigned int>(elfcpp::VER_NDX_LOCAL)
+ && sym.get_st_shndx() != elfcpp::SHN_UNDEF)
+ {
+ // This symbol should not be visible outside the object.
+ continue;
+ }
+
+ // At this point we are definitely going to add this symbol.
+ Stringpool::Key name_key;
+ name = this->namepool_.add(name, &name_key);
+
+ if (v == static_cast<unsigned int>(elfcpp::VER_NDX_LOCAL)
+ || v == static_cast<unsigned int>(elfcpp::VER_NDX_GLOBAL))
+ {
+ // This symbol does not have a version.
+ this->add_from_object(dynobj, name, name_key, NULL, 0, false, sym);
+ continue;
+ }
+
+ if (v >= version_map->size())
+ {
+ fprintf(stderr,
+ _("%s: %s: versym for symbol %zu out of range: %u\n"),
+ program_name, dynobj->name().c_str(), i, v);
+ gold_exit(false);
+ }
+
+ const char* version = (*version_map)[v];
+ if (version == NULL)
+ {
+ fprintf(stderr, _("%s: %s: versym for symbol %zu has no name: %u\n"),
+ program_name, dynobj->name().c_str(), i, v);
+ gold_exit(false);
+ }
+
+ Stringpool::Key version_key;
+ version = this->namepool_.add(version, &version_key);
+
+ // If this is an absolute symbol, and the version name and
+ // symbol name are the same, then this is the version definition
+ // symbol. These symbols exist to support using -u to pull in
+ // particular versions. We do not want to record a version for
+ // them.
+ if (sym.get_st_shndx() == elfcpp::SHN_ABS && name_key == version_key)
+ {
+ this->add_from_object(dynobj, name, name_key, NULL, 0, false, sym);
+ continue;
+ }
+
+ const bool def = !hidden && sym.get_st_shndx() != elfcpp::SHN_UNDEF;
+
+ this->add_from_object(dynobj, name, name_key, version, version_key,
+ def, sym);
+ }
+}
+
+// Create and return a specially defined symbol. If ONLY_IF_REF is
+// true, then only create the symbol if there is a reference to it.
+// If this does not return NULL, it sets *POLDSYM to the existing
+// symbol if there is one. This canonicalizes *PNAME and *PVERSION.
+
+template<int size, bool big_endian>
+Sized_symbol<size>*
+Symbol_table::define_special_symbol(const Target* target, const char** pname,
+ const char** pversion, bool only_if_ref,
+ Sized_symbol<size>** poldsym
+ ACCEPT_SIZE_ENDIAN)
+{
+ gold_assert(this->size_ == size);
+
+ Symbol* oldsym;
+ Sized_symbol<size>* sym;
+ bool add_to_table = false;
+ typename Symbol_table_type::iterator add_loc = this->table_.end();
+
+ if (only_if_ref)
+ {
+ oldsym = this->lookup(*pname, *pversion);
+ if (oldsym == NULL || !oldsym->is_undefined())
+ return NULL;
+
+ *pname = oldsym->name();
+ *pversion = oldsym->version();
+ }
+ else
+ {
+ // Canonicalize NAME and VERSION.
+ Stringpool::Key name_key;
+ *pname = this->namepool_.add(*pname, &name_key);
+
+ Stringpool::Key version_key = 0;
+ if (*pversion != NULL)
+ *pversion = this->namepool_.add(*pversion, &version_key);
+
+ Symbol* const snull = NULL;
+ std::pair<typename Symbol_table_type::iterator, bool> ins =
+ this->table_.insert(std::make_pair(std::make_pair(name_key,
+ version_key),
+ snull));
+
+ if (!ins.second)
+ {
+ // We already have a symbol table entry for NAME/VERSION.
+ oldsym = ins.first->second;
+ gold_assert(oldsym != NULL);
+ }
+ else
+ {
+ // We haven't seen this symbol before.
+ gold_assert(ins.first->second == NULL);
+ add_to_table = true;
+ add_loc = ins.first;
+ oldsym = NULL;
+ }
+ }
+
+ if (!target->has_make_symbol())
+ sym = new Sized_symbol<size>();
+ else
+ {
+ gold_assert(target->get_size() == size);
+ gold_assert(target->is_big_endian() ? big_endian : !big_endian);
+ typedef Sized_target<size, big_endian> My_target;
+ const My_target* sized_target =
+ static_cast<const My_target*>(target);
+ sym = sized_target->make_symbol();
+ if (sym == NULL)
+ return NULL;
+ }
+
+ if (add_to_table)
+ add_loc->second = sym;
+ else
+ gold_assert(oldsym != NULL);
+
+ *poldsym = this->get_sized_symbol SELECT_SIZE_NAME(size) (oldsym
+ SELECT_SIZE(size));
+
+ return sym;
+}
+
+// Define a symbol based on an Output_data.
+
+Symbol*
+Symbol_table::define_in_output_data(const Target* target, const char* name,
+ const char* version, Output_data* od,
+ uint64_t value, uint64_t symsize,
+ elfcpp::STT type, elfcpp::STB binding,
+ elfcpp::STV visibility,
+ unsigned char nonvis,
+ bool offset_is_from_end,
+ bool only_if_ref)
+{
+ gold_assert(target->get_size() == this->size_);
+ if (this->size_ == 32)
+ {
+#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
+ return this->do_define_in_output_data<32>(target, name, version, od,
+ value, symsize, type, binding,
+ visibility, nonvis,
+ offset_is_from_end,
+ only_if_ref);
+#else
+ gold_unreachable();
+#endif
+ }
+ else if (this->size_ == 64)
+ {
+#if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
+ return this->do_define_in_output_data<64>(target, name, version, od,
+ value, symsize, type, binding,
+ visibility, nonvis,
+ offset_is_from_end,
+ only_if_ref);
+#else
+ gold_unreachable();
+#endif
+ }
+ else
+ gold_unreachable();
+}
+
+// Define a symbol in an Output_data, sized version.
+
+template<int size>
+Sized_symbol<size>*
+Symbol_table::do_define_in_output_data(
+ const Target* target,
+ const char* name,
+ const char* version,
+ Output_data* od,
+ typename elfcpp::Elf_types<size>::Elf_Addr value,
+ typename elfcpp::Elf_types<size>::Elf_WXword symsize,
+ elfcpp::STT type,
+ elfcpp::STB binding,
+ elfcpp::STV visibility,
+ unsigned char nonvis,
+ bool offset_is_from_end,
+ bool only_if_ref)
+{
+ Sized_symbol<size>* sym;
+ Sized_symbol<size>* oldsym;
+
+ if (target->is_big_endian())
+ {
+#if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG)
+ sym = this->define_special_symbol SELECT_SIZE_ENDIAN_NAME(size, true) (
+ target, &name, &version, only_if_ref, &oldsym
+ SELECT_SIZE_ENDIAN(size, true));
+#else
+ gold_unreachable();
+#endif
+ }
+ else
+ {
+#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE)
+ sym = this->define_special_symbol SELECT_SIZE_ENDIAN_NAME(size, false) (
+ target, &name, &version, only_if_ref, &oldsym
+ SELECT_SIZE_ENDIAN(size, false));
+#else
+ gold_unreachable();
+#endif
+ }
+
+ if (sym == NULL)
+ return NULL;
+
+ gold_assert(version == NULL || oldsym != NULL);
+ sym->init(name, od, value, symsize, type, binding, visibility, nonvis,
+ offset_is_from_end);
+
+ if (oldsym != NULL
+ && Symbol_table::should_override_with_special(oldsym))
+ oldsym->override_with_special(sym);
+
+ return sym;
+}
+
+// Define a symbol based on an Output_segment.
+
+Symbol*
+Symbol_table::define_in_output_segment(const Target* target, const char* name,
+ const char* version, Output_segment* os,
+ uint64_t value, uint64_t symsize,
+ elfcpp::STT type, elfcpp::STB binding,
+ elfcpp::STV visibility,
+ unsigned char nonvis,
+ Symbol::Segment_offset_base offset_base,
+ bool only_if_ref)
+{
+ gold_assert(target->get_size() == this->size_);
+ if (this->size_ == 32)
+ {
+#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
+ return this->do_define_in_output_segment<32>(target, name, version, os,
+ value, symsize, type,
+ binding, visibility, nonvis,
+ offset_base, only_if_ref);
+#else
+ gold_unreachable();
+#endif
+ }
+ else if (this->size_ == 64)
+ {
+#if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
+ return this->do_define_in_output_segment<64>(target, name, version, os,
+ value, symsize, type,
+ binding, visibility, nonvis,
+ offset_base, only_if_ref);
+#else
+ gold_unreachable();
+#endif
+ }
+ else
+ gold_unreachable();
+}
+
+// Define a symbol in an Output_segment, sized version.
+
+template<int size>
+Sized_symbol<size>*
+Symbol_table::do_define_in_output_segment(
+ const Target* target,
+ const char* name,
+ const char* version,
+ Output_segment* os,
+ typename elfcpp::Elf_types<size>::Elf_Addr value,
+ typename elfcpp::Elf_types<size>::Elf_WXword symsize,
+ elfcpp::STT type,
+ elfcpp::STB binding,
+ elfcpp::STV visibility,
+ unsigned char nonvis,
+ Symbol::Segment_offset_base offset_base,
+ bool only_if_ref)
+{
+ Sized_symbol<size>* sym;
+ Sized_symbol<size>* oldsym;
+
+ if (target->is_big_endian())
+ sym = this->define_special_symbol SELECT_SIZE_ENDIAN_NAME(size, true) (
+ target, &name, &version, only_if_ref, &oldsym
+ SELECT_SIZE_ENDIAN(size, true));
+ else
+ sym = this->define_special_symbol SELECT_SIZE_ENDIAN_NAME(size, false) (
+ target, &name, &version, only_if_ref, &oldsym
+ SELECT_SIZE_ENDIAN(size, false));
+
+ if (sym == NULL)
+ return NULL;
+
+ gold_assert(version == NULL || oldsym != NULL);
+ sym->init(name, os, value, symsize, type, binding, visibility, nonvis,
+ offset_base);
+
+ if (oldsym != NULL
+ && Symbol_table::should_override_with_special(oldsym))
+ oldsym->override_with_special(sym);
+
+ return sym;
+}
+
+// Define a special symbol with a constant value. It is a multiple
+// definition error if this symbol is already defined.
+
+Symbol*
+Symbol_table::define_as_constant(const Target* target, const char* name,
+ const char* version, uint64_t value,
+ uint64_t symsize, elfcpp::STT type,
+ elfcpp::STB binding, elfcpp::STV visibility,
+ unsigned char nonvis, bool only_if_ref)
+{
+ gold_assert(target->get_size() == this->size_);
+ if (this->size_ == 32)
+ {
+#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
+ return this->do_define_as_constant<32>(target, name, version, value,
+ symsize, type, binding,
+ visibility, nonvis, only_if_ref);
+#else
+ gold_unreachable();
+#endif
+ }
+ else if (this->size_ == 64)
+ {
+#if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
+ return this->do_define_as_constant<64>(target, name, version, value,
+ symsize, type, binding,
+ visibility, nonvis, only_if_ref);
+#else
+ gold_unreachable();
+#endif
+ }
+ else
+ gold_unreachable();
+}
+
+// Define a symbol as a constant, sized version.
+
+template<int size>
+Sized_symbol<size>*
+Symbol_table::do_define_as_constant(
+ const Target* target,
+ const char* name,
+ const char* version,
+ typename elfcpp::Elf_types<size>::Elf_Addr value,
+ typename elfcpp::Elf_types<size>::Elf_WXword symsize,
+ elfcpp::STT type,
+ elfcpp::STB binding,
+ elfcpp::STV visibility,
+ unsigned char nonvis,
+ bool only_if_ref)
+{
+ Sized_symbol<size>* sym;
+ Sized_symbol<size>* oldsym;
+
+ if (target->is_big_endian())
+ sym = this->define_special_symbol SELECT_SIZE_ENDIAN_NAME(size, true) (
+ target, &name, &version, only_if_ref, &oldsym
+ SELECT_SIZE_ENDIAN(size, true));
+ else
+ sym = this->define_special_symbol SELECT_SIZE_ENDIAN_NAME(size, false) (
+ target, &name, &version, only_if_ref, &oldsym
+ SELECT_SIZE_ENDIAN(size, false));
+
+ if (sym == NULL)
+ return NULL;
+
+ gold_assert(version == NULL || oldsym != NULL);
+ sym->init(name, value, symsize, type, binding, visibility, nonvis);
+
+ if (oldsym != NULL
+ && Symbol_table::should_override_with_special(oldsym))
+ oldsym->override_with_special(sym);
+
+ return sym;
+}
+
+// Define a set of symbols in output sections.
+
+void
+Symbol_table::define_symbols(const Layout* layout, const Target* target,
+ int count, const Define_symbol_in_section* p)
+{
+ for (int i = 0; i < count; ++i, ++p)
+ {
+ Output_section* os = layout->find_output_section(p->output_section);
+ if (os != NULL)
+ this->define_in_output_data(target, p->name, NULL, os, p->value,
+ p->size, p->type, p->binding,
+ p->visibility, p->nonvis,
+ p->offset_is_from_end, p->only_if_ref);
+ else
+ this->define_as_constant(target, p->name, NULL, 0, p->size, p->type,
+ p->binding, p->visibility, p->nonvis,
+ p->only_if_ref);
+ }
+}
+
+// Define a set of symbols in output segments.
+
+void
+Symbol_table::define_symbols(const Layout* layout, const Target* target,
+ int count, const Define_symbol_in_segment* p)
+{
+ for (int i = 0; i < count; ++i, ++p)
+ {
+ Output_segment* os = layout->find_output_segment(p->segment_type,
+ p->segment_flags_set,
+ p->segment_flags_clear);
+ if (os != NULL)
+ this->define_in_output_segment(target, p->name, NULL, os, p->value,
+ p->size, p->type, p->binding,
+ p->visibility, p->nonvis,
+ p->offset_base, p->only_if_ref);
+ else
+ this->define_as_constant(target, p->name, NULL, 0, p->size, p->type,
+ p->binding, p->visibility, p->nonvis,
+ p->only_if_ref);
+ }
+}
+
+// Set the dynamic symbol indexes. INDEX is the index of the first
+// global dynamic symbol. Pointers to the symbols are stored into the
+// vector SYMS. The names are added to DYNPOOL. This returns an
+// updated dynamic symbol index.
+
+unsigned int
+Symbol_table::set_dynsym_indexes(const General_options* options,
+ const Target* target,
+ unsigned int index,
+ std::vector<Symbol*>* syms,
+ Stringpool* dynpool,
+ Versions* versions)
+{
+ for (Symbol_table_type::iterator p = this->table_.begin();
+ p != this->table_.end();
+ ++p)
+ {
+ Symbol* sym = p->second;
+
+ // Note that SYM may already have a dynamic symbol index, since
+ // some symbols appear more than once in the symbol table, with
+ // and without a version.
+
+ if (!sym->needs_dynsym_entry()
+ && (!options->export_dynamic()
+ || !sym->in_reg()
+ || !sym->is_externally_visible()))
+ sym->set_dynsym_index(-1U);
+ else if (!sym->has_dynsym_index())
+ {
+ sym->set_dynsym_index(index);
+ ++index;
+ syms->push_back(sym);
+ dynpool->add(sym->name(), NULL);
+
+ // Record any version information.
+ if (sym->version() != NULL)
+ versions->record_version(options, dynpool, sym);
+ }
+ }
+
+ // Finish up the versions. In some cases this may add new dynamic
+ // symbols.
+ index = versions->finalize(target, this, index, syms);
+
+ return index;
+}
+
+// Set the final values for all the symbols. The index of the first
+// global symbol in the output file is INDEX. Record the file offset
+// OFF. Add their names to POOL. Return the new file offset.
+
+off_t
+Symbol_table::finalize(unsigned int index, off_t off, off_t dynoff,
+ size_t dyn_global_index, size_t dyncount,
+ Stringpool* pool)
+{
+ off_t ret;
+
+ gold_assert(index != 0);
+ this->first_global_index_ = index;
+
+ this->dynamic_offset_ = dynoff;
+ this->first_dynamic_global_index_ = dyn_global_index;
+ this->dynamic_count_ = dyncount;
+
+ if (this->size_ == 32)
+ ret = this->sized_finalize<32>(index, off, pool);
+ else if (this->size_ == 64)
+ ret = this->sized_finalize<64>(index, off, pool);
+ else
+ gold_unreachable();
+
+ // Now that we have the final symbol table, we can reliably note
+ // which symbols should get warnings.
+ this->warnings_.note_warnings(this);
+
+ return ret;
+}
+
+// Set the final value for all the symbols. This is called after
+// Layout::finalize, so all the output sections have their final
+// address.
+
+template<int size>
+off_t
+Symbol_table::sized_finalize(unsigned index, off_t off, Stringpool* pool)
+{
+ off = align_address(off, size >> 3);
+ this->offset_ = off;
+
+ size_t orig_index = index;
+
+ const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
+ for (Symbol_table_type::iterator p = this->table_.begin();
+ p != this->table_.end();
+ ++p)
+ {
+ Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(p->second);
+
+ // FIXME: Here we need to decide which symbols should go into
+ // the output file, based on --strip.
+
+ // The default version of a symbol may appear twice in the
+ // symbol table. We only need to finalize it once.
+ if (sym->has_symtab_index())
+ continue;
+
+ if (!sym->in_reg())
+ {
+ gold_assert(!sym->has_symtab_index());
+ sym->set_symtab_index(-1U);
+ gold_assert(sym->dynsym_index() == -1U);
+ continue;
+ }
+
+ typename Sized_symbol<size>::Value_type value;
+
+ switch (sym->source())
+ {
+ case Symbol::FROM_OBJECT:
+ {
+ unsigned int shndx = sym->shndx();
+
+ // FIXME: We need some target specific support here.
+ if (shndx >= elfcpp::SHN_LORESERVE
+ && shndx != elfcpp::SHN_ABS)
+ {
+ fprintf(stderr, _("%s: %s: unsupported symbol section 0x%x\n"),
+ program_name, sym->name(), shndx);
+ gold_exit(false);
+ }
+
+ Object* symobj = sym->object();
+ if (symobj->is_dynamic())
+ {
+ value = 0;
+ shndx = elfcpp::SHN_UNDEF;
+ }
+ else if (shndx == elfcpp::SHN_UNDEF)
+ value = 0;
+ else if (shndx == elfcpp::SHN_ABS)
+ value = sym->value();
+ else
+ {
+ Relobj* relobj = static_cast<Relobj*>(symobj);
+ off_t secoff;
+ Output_section* os = relobj->output_section(shndx, &secoff);
+
+ if (os == NULL)
+ {
+ sym->set_symtab_index(-1U);
+ gold_assert(sym->dynsym_index() == -1U);
+ continue;
+ }
+
+ value = sym->value() + os->address() + secoff;
+ }
+ }
+ break;
+
+ case Symbol::IN_OUTPUT_DATA:
+ {
+ Output_data* od = sym->output_data();
+ value = sym->value() + od->address();
+ if (sym->offset_is_from_end())
+ value += od->data_size();
+ }
+ break;
+
+ case Symbol::IN_OUTPUT_SEGMENT:
+ {
+ Output_segment* os = sym->output_segment();
+ value = sym->value() + os->vaddr();
+ switch (sym->offset_base())
+ {
+ case Symbol::SEGMENT_START:
+ break;
+ case Symbol::SEGMENT_END:
+ value += os->memsz();
+ break;
+ case Symbol::SEGMENT_BSS:
+ value += os->filesz();
+ break;
+ default:
+ gold_unreachable();
+ }
+ }
+ break;
+
+ case Symbol::CONSTANT:
+ value = sym->value();
+ break;
+
+ default:
+ gold_unreachable();
+ }
+
+ sym->set_value(value);
+ sym->set_symtab_index(index);
+ pool->add(sym->name(), NULL);
+ ++index;
+ off += sym_size;
+ }
+
+ this->output_count_ = index - orig_index;
+
+ return off;
+}
+
+// Write out the global symbols.
+
+void
+Symbol_table::write_globals(const Target* target, const Stringpool* sympool,
+ const Stringpool* dynpool, Output_file* of) const
+{
+ if (this->size_ == 32)
+ {
+ if (target->is_big_endian())
+ this->sized_write_globals<32, true>(target, sympool, dynpool, of);
+ else
+ this->sized_write_globals<32, false>(target, sympool, dynpool, of);
+ }
+ else if (this->size_ == 64)
+ {
+ if (target->is_big_endian())
+ this->sized_write_globals<64, true>(target, sympool, dynpool, of);
+ else
+ this->sized_write_globals<64, false>(target, sympool, dynpool, of);
+ }
+ else
+ gold_unreachable();
+}
+
+// Write out the global symbols.
+
+template<int size, bool big_endian>
+void
+Symbol_table::sized_write_globals(const Target* target,
+ const Stringpool* sympool,
+ const Stringpool* dynpool,
+ Output_file* of) const
+{
+ const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
+ unsigned int index = this->first_global_index_;
+ const off_t oview_size = this->output_count_ * sym_size;
+ unsigned char* const psyms = of->get_output_view(this->offset_, oview_size);
+
+ unsigned int dynamic_count = this->dynamic_count_;
+ off_t dynamic_size = dynamic_count * sym_size;
+ unsigned int first_dynamic_global_index = this->first_dynamic_global_index_;
+ unsigned char* dynamic_view;
+ if (this->dynamic_offset_ == 0)
+ dynamic_view = NULL;
+ else
+ dynamic_view = of->get_output_view(this->dynamic_offset_, dynamic_size);
+
+ unsigned char* ps = psyms;
+ for (Symbol_table_type::const_iterator p = this->table_.begin();
+ p != this->table_.end();
+ ++p)
+ {
+ Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(p->second);
+
+ unsigned int sym_index = sym->symtab_index();
+ unsigned int dynsym_index;
+ if (dynamic_view == NULL)
+ dynsym_index = -1U;
+ else
+ dynsym_index = sym->dynsym_index();
+
+ if (sym_index == -1U && dynsym_index == -1U)
+ {
+ // This symbol is not included in the output file.
+ continue;
+ }
+
+ if (sym_index == index)
+ ++index;
+ else if (sym_index != -1U)
+ {
+ // We have already seen this symbol, because it has a
+ // default version.
+ gold_assert(sym_index < index);
+ if (dynsym_index == -1U)
+ continue;
+ sym_index = -1U;
+ }
+
+ unsigned int shndx;
+ typename elfcpp::Elf_types<32>::Elf_Addr value = sym->value();
+ switch (sym->source())
+ {
+ case Symbol::FROM_OBJECT:
+ {
+ unsigned int in_shndx = sym->shndx();
+
+ // FIXME: We need some target specific support here.
+ if (in_shndx >= elfcpp::SHN_LORESERVE
+ && in_shndx != elfcpp::SHN_ABS)
+ {
+ fprintf(stderr, _("%s: %s: unsupported symbol section 0x%x\n"),
+ program_name, sym->name(), in_shndx);
+ gold_exit(false);
+ }
+
+ Object* symobj = sym->object();
+ if (symobj->is_dynamic())
+ {
+ if (sym->needs_dynsym_value())
+ value = target->dynsym_value(sym);
+ shndx = elfcpp::SHN_UNDEF;
+ }
+ else if (in_shndx == elfcpp::SHN_UNDEF
+ || in_shndx == elfcpp::SHN_ABS)
+ shndx = in_shndx;
+ else
+ {
+ Relobj* relobj = static_cast<Relobj*>(symobj);
+ off_t secoff;
+ Output_section* os = relobj->output_section(in_shndx, &secoff);
+ gold_assert(os != NULL);
+ shndx = os->out_shndx();
+ }
+ }
+ break;
+
+ case Symbol::IN_OUTPUT_DATA:
+ shndx = sym->output_data()->out_shndx();
+ break;
+
+ case Symbol::IN_OUTPUT_SEGMENT:
+ shndx = elfcpp::SHN_ABS;
+ break;
+
+ case Symbol::CONSTANT:
+ shndx = elfcpp::SHN_ABS;
+ break;
+
+ default:
+ gold_unreachable();
+ }
+
+ if (sym_index != -1U)
+ {
+ this->sized_write_symbol SELECT_SIZE_ENDIAN_NAME(size, big_endian) (
+ sym, sym->value(), shndx, sympool, ps
+ SELECT_SIZE_ENDIAN(size, big_endian));
+ ps += sym_size;
+ }
+
+ if (dynsym_index != -1U)
+ {
+ dynsym_index -= first_dynamic_global_index;
+ gold_assert(dynsym_index < dynamic_count);
+ unsigned char* pd = dynamic_view + (dynsym_index * sym_size);
+ this->sized_write_symbol SELECT_SIZE_ENDIAN_NAME(size, big_endian) (
+ sym, value, shndx, dynpool, pd
+ SELECT_SIZE_ENDIAN(size, big_endian));
+ }
+ }
+
+ gold_assert(ps - psyms == oview_size);
+
+ of->write_output_view(this->offset_, oview_size, psyms);
+ if (dynamic_view != NULL)
+ of->write_output_view(this->dynamic_offset_, dynamic_size, dynamic_view);
+}
+
+// Write out the symbol SYM, in section SHNDX, to P. POOL is the
+// strtab holding the name.
+
+template<int size, bool big_endian>
+void
+Symbol_table::sized_write_symbol(
+ Sized_symbol<size>* sym,
+ typename elfcpp::Elf_types<size>::Elf_Addr value,
+ unsigned int shndx,
+ const Stringpool* pool,
+ unsigned char* p
+ ACCEPT_SIZE_ENDIAN) const
+{
+ elfcpp::Sym_write<size, big_endian> osym(p);
+ osym.put_st_name(pool->get_offset(sym->name()));
+ osym.put_st_value(value);
+ osym.put_st_size(sym->symsize());
+ osym.put_st_info(elfcpp::elf_st_info(sym->binding(), sym->type()));
+ osym.put_st_other(elfcpp::elf_st_other(sym->visibility(), sym->nonvis()));
+ osym.put_st_shndx(shndx);
+}
+
+// Write out a section symbol. Return the update offset.
+
+void
+Symbol_table::write_section_symbol(const Target* target,
+ const Output_section *os,
+ Output_file* of,
+ off_t offset) const
+{
+ if (this->size_ == 32)
+ {
+ if (target->is_big_endian())
+ this->sized_write_section_symbol<32, true>(os, of, offset);
+ else
+ this->sized_write_section_symbol<32, false>(os, of, offset);
+ }
+ else if (this->size_ == 64)
+ {
+ if (target->is_big_endian())
+ this->sized_write_section_symbol<64, true>(os, of, offset);
+ else
+ this->sized_write_section_symbol<64, false>(os, of, offset);
+ }
+ else
+ gold_unreachable();
+}
+
+// Write out a section symbol, specialized for size and endianness.
+
+template<int size, bool big_endian>
+void
+Symbol_table::sized_write_section_symbol(const Output_section* os,
+ Output_file* of,
+ off_t offset) const
+{
+ const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
+
+ unsigned char* pov = of->get_output_view(offset, sym_size);
+
+ elfcpp::Sym_write<size, big_endian> osym(pov);
+ osym.put_st_name(0);
+ osym.put_st_value(os->address());
+ osym.put_st_size(0);
+ osym.put_st_info(elfcpp::elf_st_info(elfcpp::STB_LOCAL,
+ elfcpp::STT_SECTION));
+ osym.put_st_other(elfcpp::elf_st_other(elfcpp::STV_DEFAULT, 0));
+ osym.put_st_shndx(os->out_shndx());
+
+ of->write_output_view(offset, sym_size, pov);
+}
+
+// Warnings functions.
+
+// Add a new warning.
+
+void
+Warnings::add_warning(Symbol_table* symtab, const char* name, Object* obj,
+ unsigned int shndx)
+{
+ name = symtab->canonicalize_name(name);
+ this->warnings_[name].set(obj, shndx);
+}
+
+// Look through the warnings and mark the symbols for which we should
+// warn. This is called during Layout::finalize when we know the
+// sources for all the symbols.
+
+void
+Warnings::note_warnings(Symbol_table* symtab)
+{
+ for (Warning_table::iterator p = this->warnings_.begin();
+ p != this->warnings_.end();
+ ++p)
+ {
+ Symbol* sym = symtab->lookup(p->first, NULL);
+ if (sym != NULL
+ && sym->source() == Symbol::FROM_OBJECT
+ && sym->object() == p->second.object)
+ {
+ sym->set_has_warning();
+
+ // Read the section contents to get the warning text. It
+ // would be nicer if we only did this if we have to actually
+ // issue a warning. Unfortunately, warnings are issued as
+ // we relocate sections. That means that we can not lock
+ // the object then, as we might try to issue the same
+ // warning multiple times simultaneously.
+ {
+ Task_locker_obj<Object> tl(*p->second.object);
+ const unsigned char* c;
+ off_t len;
+ c = p->second.object->section_contents(p->second.shndx, &len,
+ false);
+ p->second.set_text(reinterpret_cast<const char*>(c), len);
+ }
+ }
+ }
+}
+
+// Issue a warning. This is called when we see a relocation against a
+// symbol for which has a warning.
+
+void
+Warnings::issue_warning(const Symbol* sym, const std::string& location) const
+{
+ gold_assert(sym->has_warning());
+ Warning_table::const_iterator p = this->warnings_.find(sym->name());
+ gold_assert(p != this->warnings_.end());
+ fprintf(stderr, _("%s: %s: warning: %s\n"), program_name, location.c_str(),
+ p->second.text.c_str());
}
// Instantiate the templates we need. We could use the configure
// script to restrict this to only the ones needed for implemented
// targets.
+#ifdef HAVE_TARGET_32_LITTLE
template
void
-Symbol_table::add_from_object<32, true>(
- Sized_object<32, true>* object,
- const elfcpp::Sym<32, true>* syms,
+Symbol_table::add_from_relobj<32, false>(
+ Sized_relobj<32, false>* relobj,
+ const unsigned char* syms,
size_t count,
const char* sym_names,
size_t sym_name_size,
Symbol** sympointers);
+#endif
+#ifdef HAVE_TARGET_32_BIG
template
void
-Symbol_table::add_from_object<32, false>(
- Sized_object<32, false>* object,
- const elfcpp::Sym<32, false>* syms,
+Symbol_table::add_from_relobj<32, true>(
+ Sized_relobj<32, true>* relobj,
+ const unsigned char* syms,
size_t count,
const char* sym_names,
size_t sym_name_size,
Symbol** sympointers);
+#endif
+#ifdef HAVE_TARGET_64_LITTLE
template
void
-Symbol_table::add_from_object<64, true>(
- Sized_object<64, true>* object,
- const elfcpp::Sym<64, true>* syms,
+Symbol_table::add_from_relobj<64, false>(
+ Sized_relobj<64, false>* relobj,
+ const unsigned char* syms,
size_t count,
const char* sym_names,
size_t sym_name_size,
Symbol** sympointers);
+#endif
+#ifdef HAVE_TARGET_64_BIG
template
void
-Symbol_table::add_from_object<64, false>(
- Sized_object<64, false>* object,
- const elfcpp::Sym<64, false>* syms,
+Symbol_table::add_from_relobj<64, true>(
+ Sized_relobj<64, true>* relobj,
+ const unsigned char* syms,
size_t count,
const char* sym_names,
size_t sym_name_size,
Symbol** sympointers);
+#endif
+
+#ifdef HAVE_TARGET_32_LITTLE
+template
+void
+Symbol_table::add_from_dynobj<32, false>(
+ Sized_dynobj<32, false>* dynobj,
+ const unsigned char* syms,
+ size_t count,
+ const char* sym_names,
+ size_t sym_name_size,
+ const unsigned char* versym,
+ size_t versym_size,
+ const std::vector<const char*>* version_map);
+#endif
+
+#ifdef HAVE_TARGET_32_BIG
+template
+void
+Symbol_table::add_from_dynobj<32, true>(
+ Sized_dynobj<32, true>* dynobj,
+ const unsigned char* syms,
+ size_t count,
+ const char* sym_names,
+ size_t sym_name_size,
+ const unsigned char* versym,
+ size_t versym_size,
+ const std::vector<const char*>* version_map);
+#endif
+
+#ifdef HAVE_TARGET_64_LITTLE
+template
+void
+Symbol_table::add_from_dynobj<64, false>(
+ Sized_dynobj<64, false>* dynobj,
+ const unsigned char* syms,
+ size_t count,
+ const char* sym_names,
+ size_t sym_name_size,
+ const unsigned char* versym,
+ size_t versym_size,
+ const std::vector<const char*>* version_map);
+#endif
+
+#ifdef HAVE_TARGET_64_BIG
+template
+void
+Symbol_table::add_from_dynobj<64, true>(
+ Sized_dynobj<64, true>* dynobj,
+ const unsigned char* syms,
+ size_t count,
+ const char* sym_names,
+ size_t sym_name_size,
+ const unsigned char* versym,
+ size_t versym_size,
+ const std::vector<const char*>* version_map);
+#endif
} // End namespace gold.
projects / deliverable / binutils-gdb.git / blobdiff