// symtab.cc -- the gold symbol table
-// Copyright 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
+// Copyright 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
// Written by Ian Lance Taylor <iant@google.com>.
// This file is part of gold.
#include "target.h"
#include "workqueue.h"
#include "symtab.h"
-#include "demangle.h" // needed for --dynamic-list-cpp-new
+#include "script.h"
#include "plugin.h"
namespace gold
this->symtab_index_ = 0;
this->dynsym_index_ = 0;
this->got_offsets_.init();
- this->plt_offset_ = 0;
+ this->plt_offset_ = -1U;
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->has_alias_ = false;
this->needs_dynsym_entry_ = false;
this->in_reg_ = false;
this->in_dyn_ = false;
- this->has_plt_offset_ = false;
this->has_warning_ = false;
this->is_copied_from_dynobj_ = false;
this->is_forced_local_ = false;
this->is_ordinary_shndx_ = false;
this->in_real_elf_ = false;
+ this->is_defined_in_discarded_section_ = false;
+ this->undef_binding_set_ = false;
+ this->undef_binding_weak_ = false;
}
// Return the demangled version of the symbol's name, but only
this->symsize_ = 0;
}
+// Return true if SHNDX represents a common symbol.
+
+bool
+Symbol::is_common_shndx(unsigned int shndx)
+{
+ return (shndx == elfcpp::SHN_COMMON
+ || shndx == parameters->target().small_common_shndx()
+ || shndx == parameters->target().large_common_shndx());
+}
+
// Allocate a common symbol.
template<int size>
// table.
inline bool
-Symbol::should_add_dynsym_entry() const
+Symbol::should_add_dynsym_entry(Symbol_table* symtab) const
{
+ // If the symbol is only present on plugin files, the plugin decided we
+ // don't need it.
+ if (!this->in_real_elf())
+ return false;
+
// If the symbol is used by a dynamic relocation, we need to add it.
if (this->needs_dynsym_entry())
return true;
bool is_ordinary;
unsigned int shndx = this->shndx(&is_ordinary);
if (is_ordinary && shndx != elfcpp::SHN_UNDEF
- && !relobj->is_section_included(shndx))
+ && !relobj->is_section_included(shndx)
+ && !symtab->is_section_folded(relobj, shndx))
return false;
}
{
// If we are not generating an executable, then no final values are
// known, since they will change at runtime.
- if (parameters->options().shared() || parameters->options().relocatable())
+ if (parameters->options().output_is_position_independent()
+ || parameters->options().relocatable())
return false;
// If the symbol is not from an object file, and is not undefined,
Symbol_table::Symbol_table(unsigned int count,
const Version_script_info& version_script)
: saw_undefined_(0), offset_(0), table_(count), namepool_(),
- forwarders_(), commons_(), tls_commons_(), forced_locals_(), warnings_(),
- version_script_(version_script), gc_(NULL)
+ forwarders_(), commons_(), tls_commons_(), small_commons_(),
+ large_commons_(), forced_locals_(), warnings_(),
+ version_script_(version_script), gc_(NULL), icf_(NULL)
{
namepool_.reserve(count);
}
{
}
-// The hash function. The key values are Stringpool keys.
-
-inline size_t
-Symbol_table::Symbol_table_hash::operator()(const Symbol_table_key& key) const
-{
- return key.first ^ key.second;
-}
-
// The symbol table key equality function. This is called with
// Stringpool keys.
return k1.first == k2.first && k1.second == k2.second;
}
+bool
+Symbol_table::is_section_folded(Object* obj, unsigned int shndx) const
+{
+ return (parameters->options().icf_enabled()
+ && this->icf_->is_section_folded(obj, shndx));
+}
+
// For symbols that have been listed with -u option, add them to the
// work list to avoid gc'ing them.
void
-Symbol_table::gc_mark_undef_symbols()
+Symbol_table::gc_mark_undef_symbols(Layout* layout)
{
for (options::String_set::const_iterator p =
parameters->options().undefined_begin();
{
const char* name = p->c_str();
Symbol* sym = this->lookup(name);
- gold_assert (sym != NULL);
+ gold_assert(sym != NULL);
if (sym->source() == Symbol::FROM_OBJECT
&& !sym->object()->is_dynamic())
{
}
}
}
+
+ for (Script_options::referenced_const_iterator p =
+ layout->script_options()->referenced_begin();
+ p != layout->script_options()->referenced_end();
+ ++p)
+ {
+ Symbol* sym = this->lookup(p->c_str());
+ gold_assert(sym != NULL);
+ if (sym->source() == Symbol::FROM_OBJECT
+ && !sym->object()->is_dynamic())
+ {
+ Relobj* obj = static_cast<Relobj*>(sym->object());
+ bool is_ordinary;
+ unsigned int shndx = sym->shndx(&is_ordinary);
+ if (is_ordinary)
+ {
+ gold_assert(this->gc_ != NULL);
+ this->gc_->worklist().push(Section_id(obj, shndx));
+ }
+ }
+ }
}
void
if (sym->in_dyn() && sym->source() == Symbol::FROM_OBJECT
&& !sym->object()->is_dynamic())
{
- Relobj *obj = static_cast<Relobj*>(sym->object());
+ Relobj* obj = static_cast<Relobj*>(sym->object());
bool is_ordinary;
unsigned int shndx = sym->shndx(&is_ordinary);
if (is_ordinary && shndx != elfcpp::SHN_UNDEF)
this->gc_mark_dyn_syms(to);
}
-// Record that a symbol is forced to be local by a version script.
+// Record that a symbol is forced to be local by a version script or
+// by visibility.
void
Symbol_table::force_local(Symbol* sym)
// option was used.
const char*
-Symbol_table::wrap_symbol(Object* object, const char* name,
- Stringpool::Key* name_key)
+Symbol_table::wrap_symbol(const char* name, Stringpool::Key* name_key)
{
// For some targets, we need to ignore a specific character when
// wrapping, and add it back later.
char prefix = '\0';
- if (name[0] == object->target()->wrap_char())
+ if (name[0] == parameters->target().wrap_char())
{
prefix = name[0];
++name;
return name;
}
+// This is called when we see a symbol NAME/VERSION, and the symbol
+// already exists in the symbol table, and VERSION is marked as being
+// the default version. SYM is the NAME/VERSION symbol we just added.
+// DEFAULT_IS_NEW is true if this is the first time we have seen the
+// symbol NAME/NULL. PDEF points to the entry for NAME/NULL.
+
+template<int size, bool big_endian>
+void
+Symbol_table::define_default_version(Sized_symbol<size>* sym,
+ bool default_is_new,
+ Symbol_table_type::iterator pdef)
+{
+ if (default_is_new)
+ {
+ // This is the first time we have seen NAME/NULL. Make
+ // NAME/NULL point to NAME/VERSION, and mark SYM as the default
+ // version.
+ pdef->second = sym;
+ sym->set_is_default();
+ }
+ else if (pdef->second == sym)
+ {
+ // NAME/NULL already points to NAME/VERSION. Don't mark the
+ // symbol as the default if it is not already the default.
+ }
+ else
+ {
+ // This is the unfortunate case where we already have entries
+ // for both NAME/VERSION and NAME/NULL. We now see a symbol
+ // NAME/VERSION where VERSION is the default version. We have
+ // already resolved this new symbol with the existing
+ // NAME/VERSION symbol.
+
+ // It's possible that NAME/NULL and NAME/VERSION are both
+ // defined in regular objects. This can only happen if one
+ // object file defines foo and another defines foo@@ver. This
+ // is somewhat obscure, but we call it a multiple definition
+ // error.
+
+ // It's possible that NAME/NULL actually has a version, in which
+ // case it won't be the same as VERSION. This happens with
+ // ver_test_7.so in the testsuite for the symbol t2_2. We see
+ // t2_2@@VER2, so we define both t2_2/VER2 and t2_2/NULL. We
+ // then see an unadorned t2_2 in an object file and give it
+ // version VER1 from the version script. This looks like a
+ // default definition for VER1, so it looks like we should merge
+ // t2_2/NULL with t2_2/VER1. That doesn't make sense, but it's
+ // not obvious that this is an error, either. So we just punt.
+
+ // If one of the symbols has non-default visibility, and the
+ // other is defined in a shared object, then they are different
+ // symbols.
+
+ // Otherwise, we just resolve the symbols as though they were
+ // the same.
+
+ if (pdef->second->version() != NULL)
+ gold_assert(pdef->second->version() != sym->version());
+ else if (sym->visibility() != elfcpp::STV_DEFAULT
+ && pdef->second->is_from_dynobj())
+ ;
+ else if (pdef->second->visibility() != elfcpp::STV_DEFAULT
+ && sym->is_from_dynobj())
+ ;
+ else
+ {
+ const Sized_symbol<size>* symdef;
+ symdef = this->get_sized_symbol<size>(pdef->second);
+ Symbol_table::resolve<size, big_endian>(sym, symdef);
+ this->make_forwarder(pdef->second, sym);
+ pdef->second = sym;
+ sym->set_is_default();
+ }
+ }
+}
+
// Add one symbol from OBJECT to the symbol table. NAME is symbol
// name and VERSION is the version; both are canonicalized. DEF is
// whether this is the default version. ST_SHNDX is the symbol's
// section index; IS_ORDINARY is whether this is a normal section
// rather than a special code.
-// If DEF is true, then this is the definition of a default version of
-// a symbol. That means that any lookup of NAME/NULL and any lookup
-// of NAME/VERSION should always return the same symbol. This is
-// obvious for references, but in particular we want to do this for
-// definitions: overriding NAME/NULL should also override
-// NAME/VERSION. If we don't do that, it would be very hard to
-// override functions in a shared library which uses versioning.
+// If IS_DEFAULT_VERSION is true, then this is the definition of a
+// default version of a symbol. That means that any lookup of
+// NAME/NULL and any lookup of NAME/VERSION should always return the
+// same symbol. This is obvious for references, but in particular we
+// want to do this for definitions: overriding NAME/NULL should also
+// override NAME/VERSION. If we don't do that, it would be very hard
+// to override functions in a shared library which uses versioning.
// We implement this by simply making both entries in the hash table
// point to the same Symbol structure. That is easy enough if this is
template<int size, bool big_endian>
Sized_symbol<size>*
Symbol_table::add_from_object(Object* object,
- const char *name,
+ const char* name,
Stringpool::Key name_key,
- const char *version,
+ const char* version,
Stringpool::Key version_key,
- bool def,
+ bool is_default_version,
const elfcpp::Sym<size, big_endian>& sym,
unsigned int st_shndx,
bool is_ordinary,
if (orig_st_shndx == elfcpp::SHN_UNDEF
&& parameters->options().any_wrap())
{
- const char* wrap_name = this->wrap_symbol(object, name, &name_key);
+ const char* wrap_name = this->wrap_symbol(name, &name_key);
if (wrap_name != name)
{
// If we see a reference to malloc with version GLIBC_2.0,
this->table_.insert(std::make_pair(std::make_pair(name_key, version_key),
snull));
- std::pair<typename Symbol_table_type::iterator, bool> insdef =
+ std::pair<typename Symbol_table_type::iterator, bool> insdefault =
std::make_pair(this->table_.end(), false);
- if (def)
+ if (is_default_version)
{
const Stringpool::Key vnull_key = 0;
- insdef = this->table_.insert(std::make_pair(std::make_pair(name_key,
- vnull_key),
- snull));
+ insdefault = this->table_.insert(std::make_pair(std::make_pair(name_key,
+ vnull_key),
+ snull));
}
// ins.first: an iterator, which is a pointer to a pair.
if (parameters->options().gc_sections())
this->gc_mark_dyn_syms(ret);
- if (def)
- {
- if (insdef.second)
- {
- // This is the first time we have seen NAME/NULL. Make
- // NAME/NULL point to NAME/VERSION.
- insdef.first->second = ret;
- }
- else if (insdef.first->second != ret)
- {
- // This is the unfortunate case where we already have
- // entries for both NAME/VERSION and NAME/NULL. We now
- // see a symbol NAME/VERSION where VERSION is the
- // default version. We have already resolved this new
- // symbol with the existing NAME/VERSION symbol.
-
- // It's possible that NAME/NULL and NAME/VERSION are
- // both defined in regular objects. This can only
- // happen if one object file defines foo and another
- // defines foo@@ver. This is somewhat obscure, but we
- // call it a multiple definition error.
-
- // It's possible that NAME/NULL actually has a version,
- // in which case it won't be the same as VERSION. This
- // happens with ver_test_7.so in the testsuite for the
- // symbol t2_2. We see t2_2@@VER2, so we define both
- // t2_2/VER2 and t2_2/NULL. We then see an unadorned
- // t2_2 in an object file and give it version VER1 from
- // the version script. This looks like a default
- // definition for VER1, so it looks like we should merge
- // t2_2/NULL with t2_2/VER1. That doesn't make sense,
- // but it's not obvious that this is an error, either.
- // So we just punt.
-
- // If one of the symbols has non-default visibility, and
- // the other is defined in a shared object, then they
- // are different symbols.
-
- // Otherwise, we just resolve the symbols as though they
- // were the same.
-
- if (insdef.first->second->version() != NULL)
- {
- gold_assert(insdef.first->second->version() != version);
- def = false;
- }
- else if (ret->visibility() != elfcpp::STV_DEFAULT
- && insdef.first->second->is_from_dynobj())
- def = false;
- else if (insdef.first->second->visibility() != elfcpp::STV_DEFAULT
- && ret->is_from_dynobj())
- def = false;
- else
- {
- const Sized_symbol<size>* sym2;
- sym2 = this->get_sized_symbol<size>(insdef.first->second);
- Symbol_table::resolve<size, big_endian>(ret, sym2);
- this->make_forwarder(insdef.first->second, ret);
- insdef.first->second = ret;
- }
- }
- else
- def = false;
- }
+ if (is_default_version)
+ this->define_default_version<size, big_endian>(ret, insdefault.second,
+ insdefault.first);
}
else
{
// This is the first time we have seen NAME/VERSION.
gold_assert(ins.first->second == NULL);
- if (def && !insdef.second)
+ if (is_default_version && !insdefault.second)
{
// We already have an entry for NAME/NULL. If we override
// it, then change it to NAME/VERSION.
- ret = this->get_sized_symbol<size>(insdef.first->second);
+ ret = this->get_sized_symbol<size>(insdefault.first->second);
was_undefined = ret->is_undefined();
was_common = ret->is_common();
was_common = false;
Sized_target<size, big_endian>* target =
- object->sized_target<size, big_endian>();
+ parameters->sized_target<size, big_endian>();
if (!target->has_make_symbol())
ret = new Sized_symbol<size>();
else
{
// This means that we don't want a symbol table
// entry after all.
- if (!def)
+ if (!is_default_version)
this->table_.erase(ins.first);
else
{
- this->table_.erase(insdef.first);
- // Inserting insdef invalidated ins.
+ this->table_.erase(insdefault.first);
+ // Inserting INSDEFAULT invalidated INS.
this->table_.erase(std::make_pair(name_key,
version_key));
}
ret->init_object(name, version, object, sym, st_shndx, is_ordinary);
ins.first->second = ret;
- if (def)
+ if (is_default_version)
{
// This is the first time we have seen NAME/NULL. Point
// it at the new entry for NAME/VERSION.
- gold_assert(insdef.second);
- insdef.first->second = ret;
+ gold_assert(insdefault.second);
+ insdefault.first->second = ret;
}
}
+
+ if (is_default_version)
+ ret->set_is_default();
}
// Record every time we see a new undefined symbol, to speed up
// archive groups.
if (!was_undefined && ret->is_undefined())
- ++this->saw_undefined_;
+ {
+ ++this->saw_undefined_;
+ if (parameters->options().has_plugins())
+ parameters->options().plugins()->new_undefined_symbol(ret);
+ }
// Keep track of common symbols, to speed up common symbol
// allocation.
if (!was_common && ret->is_common())
{
- if (ret->type() != elfcpp::STT_TLS)
- this->commons_.push_back(ret);
- else
+ if (ret->type() == elfcpp::STT_TLS)
this->tls_commons_.push_back(ret);
+ else if (!is_ordinary
+ && st_shndx == parameters->target().small_common_shndx())
+ this->small_commons_.push_back(ret);
+ else if (!is_ordinary
+ && st_shndx == parameters->target().large_common_shndx())
+ this->large_commons_.push_back(ret);
+ else
+ this->commons_.push_back(ret);
}
- if (def)
- ret->set_is_default();
+ // If we're not doing a relocatable link, then any symbol with
+ // hidden or internal visibility is local.
+ if ((ret->visibility() == elfcpp::STV_HIDDEN
+ || ret->visibility() == elfcpp::STV_INTERNAL)
+ && (ret->binding() == elfcpp::STB_GLOBAL
+ || ret->binding() == elfcpp::STB_GNU_UNIQUE
+ || ret->binding() == elfcpp::STB_WEAK)
+ && !parameters->options().relocatable())
+ this->force_local(ret);
+
return ret;
}
const char* sym_names,
size_t sym_name_size,
typename Sized_relobj<size, big_endian>::Symbols* sympointers,
- size_t *defined)
+ size_t* defined)
{
*defined = 0;
- gold_assert(size == relobj->target()->get_size());
gold_assert(size == parameters->target().get_size());
const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
// A symbol defined in a section which we are not including must
// be treated as an undefined symbol.
+ bool is_defined_in_discarded_section = false;
if (st_shndx != elfcpp::SHN_UNDEF
&& is_ordinary
- && !relobj->is_section_included(st_shndx))
- st_shndx = elfcpp::SHN_UNDEF;
+ && !relobj->is_section_included(st_shndx)
+ && !this->is_section_folded(relobj, st_shndx))
+ {
+ st_shndx = elfcpp::SHN_UNDEF;
+ is_defined_in_discarded_section = true;
+ }
// In an object file, an '@' in the name separates the symbol
// name from the version name. If there are two '@' characters,
const char* ver = strchr(name, '@');
Stringpool::Key ver_key = 0;
int namelen = 0;
- // DEF: is the version default? LOCAL: is the symbol forced local?
- bool def = false;
- bool local = false;
+ // IS_DEFAULT_VERSION: is the version default?
+ // IS_FORCED_LOCAL: is the symbol forced local?
+ bool is_default_version = false;
+ bool is_forced_local = false;
if (ver != NULL)
{
++ver;
if (*ver == '@')
{
- def = true;
+ is_default_version = true;
++ver;
}
ver = this->namepool_.add(ver, true, &ver_key);
// The symbol name did not have a version, but the
// version script may assign a version anyway.
std::string version;
- if (this->version_script_.get_symbol_version(name, &version))
+ bool is_global;
+ if (this->version_script_.get_symbol_version(name, &version,
+ &is_global))
{
- // The version can be empty if the version script is
- // only used to force some symbols to be local.
- if (!version.empty())
+ if (!is_global)
+ is_forced_local = true;
+ else if (!version.empty())
{
ver = this->namepool_.add_with_length(version.c_str(),
version.length(),
true,
&ver_key);
- def = true;
+ is_default_version = true;
}
}
- else if (this->version_script_.symbol_is_local(name))
- local = true;
}
}
psym = &sym2;
}
+ // Fix up visibility if object has no-export set.
+ if (relobj->no_export()
+ && (orig_st_shndx != elfcpp::SHN_UNDEF || !is_ordinary))
+ {
+ // We may have copied symbol already above.
+ if (psym != &sym2)
+ {
+ memcpy(symbuf, p, sym_size);
+ psym = &sym2;
+ }
+
+ elfcpp::STV visibility = sym2.get_st_visibility();
+ if (visibility == elfcpp::STV_DEFAULT
+ || visibility == elfcpp::STV_PROTECTED)
+ {
+ elfcpp::Sym_write<size, big_endian> sw(symbuf);
+ unsigned char nonvis = sym2.get_st_nonvis();
+ sw.put_st_other(elfcpp::STV_HIDDEN, nonvis);
+ }
+ }
+
Stringpool::Key name_key;
name = this->namepool_.add_with_length(name, namelen, true,
&name_key);
Sized_symbol<size>* res;
res = this->add_from_object(relobj, name, name_key, ver, ver_key,
- def, *psym, st_shndx, is_ordinary,
- orig_st_shndx);
+ is_default_version, *psym, st_shndx,
+ is_ordinary, orig_st_shndx);
// If building a shared library using garbage collection, do not
// treat externally visible symbols as garbage.
&& parameters->options().shared())
this->gc_mark_symbol_for_shlib(res);
- if (local)
+ if (is_forced_local)
this->force_local(res);
+ if (is_defined_in_discarded_section)
+ res->set_is_defined_in_discarded_section();
+
(*sympointers)[i] = res;
}
}
elfcpp::Sym<size, big_endian>* sym)
{
unsigned int st_shndx = sym->get_st_shndx();
+ bool is_ordinary = st_shndx < elfcpp::SHN_LORESERVE;
Stringpool::Key ver_key = 0;
- bool def = false;
- bool local = false;
+ bool is_default_version = false;
+ bool is_forced_local = false;
if (ver != NULL)
{
// The symbol name did not have a version, but the
// version script may assign a version anyway.
std::string version;
- if (this->version_script_.get_symbol_version(name, &version))
+ bool is_global;
+ if (this->version_script_.get_symbol_version(name, &version,
+ &is_global))
{
- // The version can be empty if the version script is
- // only used to force some symbols to be local.
- if (!version.empty())
+ if (!is_global)
+ is_forced_local = true;
+ else if (!version.empty())
{
ver = this->namepool_.add_with_length(version.c_str(),
version.length(),
true,
&ver_key);
- def = true;
+ is_default_version = true;
}
}
- else if (this->version_script_.symbol_is_local(name))
- local = true;
}
}
Sized_symbol<size>* res;
res = this->add_from_object(obj, name, name_key, ver, ver_key,
- def, *sym, st_shndx, true, st_shndx);
+ is_default_version, *sym, st_shndx,
+ is_ordinary, st_shndx);
- if (local)
- this->force_local(res);
+ if (is_forced_local)
+ this->force_local(res);
return res;
}
{
*defined = 0;
- gold_assert(size == dynobj->target()->get_size());
gold_assert(size == parameters->target().get_size());
if (dynobj->just_symbols())
st_shndx);
else
{
- const bool def = (!hidden
- && st_shndx != elfcpp::SHN_UNDEF);
+ const bool is_default_version =
+ !hidden && st_shndx != elfcpp::SHN_UNDEF;
res = this->add_from_object(dynobj, name, name_key, version,
- version_key, def, *psym, st_shndx,
+ version_key, is_default_version,
+ *psym, st_shndx,
is_ordinary, st_shndx);
}
}
// 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.
+// symbol if there is one. This sets *RESOLVE_OLDSYM if we should
+// resolve the newly created symbol to the old one. This
+// canonicalizes *PNAME and *PVERSION.
template<int size, bool big_endian>
Sized_symbol<size>*
Symbol_table::define_special_symbol(const char** pname, const char** pversion,
bool only_if_ref,
- Sized_symbol<size>** poldsym)
+ Sized_symbol<size>** poldsym,
+ bool* resolve_oldsym)
{
- Symbol* oldsym;
- Sized_symbol<size>* sym;
- bool add_to_table = false;
- typename Symbol_table_type::iterator add_loc = this->table_.end();
+ *resolve_oldsym = false;
// If the caller didn't give us a version, see if we get one from
// the version script.
std::string v;
+ bool is_default_version = false;
if (*pversion == NULL)
{
- if (this->version_script_.get_symbol_version(*pname, &v))
+ bool is_global;
+ if (this->version_script_.get_symbol_version(*pname, &v, &is_global))
{
- if (!v.empty())
- *pversion = v.c_str();
+ if (is_global && !v.empty())
+ {
+ *pversion = v.c_str();
+ // If we get the version from a version script, then we
+ // are also the default version.
+ is_default_version = true;
+ }
}
}
+ Symbol* oldsym;
+ Sized_symbol<size>* sym;
+
+ bool add_to_table = false;
+ typename Symbol_table_type::iterator add_loc = this->table_.end();
+ bool add_def_to_table = false;
+ typename Symbol_table_type::iterator add_def_loc = this->table_.end();
+
if (only_if_ref)
{
oldsym = this->lookup(*pname, *pversion);
+ if (oldsym == NULL && is_default_version)
+ oldsym = this->lookup(*pname, NULL);
if (oldsym == NULL || !oldsym->is_undefined())
return NULL;
*pname = oldsym->name();
- *pversion = oldsym->version();
+ if (!is_default_version)
+ *pversion = oldsym->version();
}
else
{
version_key),
snull));
+ std::pair<typename Symbol_table_type::iterator, bool> insdefault =
+ std::make_pair(this->table_.end(), false);
+ if (is_default_version)
+ {
+ const Stringpool::Key vnull = 0;
+ insdefault =
+ this->table_.insert(std::make_pair(std::make_pair(name_key,
+ vnull),
+ snull));
+ }
+
if (!ins.second)
{
// We already have a symbol table entry for NAME/VERSION.
oldsym = ins.first->second;
gold_assert(oldsym != NULL);
+
+ if (is_default_version)
+ {
+ Sized_symbol<size>* soldsym =
+ this->get_sized_symbol<size>(oldsym);
+ this->define_default_version<size, big_endian>(soldsym,
+ insdefault.second,
+ insdefault.first);
+ }
}
else
{
// We haven't seen this symbol before.
gold_assert(ins.first->second == NULL);
- add_to_table = true;
- add_loc = ins.first;
- oldsym = NULL;
+
+ add_to_table = true;
+ add_loc = ins.first;
+
+ if (is_default_version && !insdefault.second)
+ {
+ // We are adding NAME/VERSION, and it is the default
+ // version. We already have an entry for NAME/NULL.
+ oldsym = insdefault.first->second;
+ *resolve_oldsym = true;
+ }
+ else
+ {
+ oldsym = NULL;
+
+ if (is_default_version)
+ {
+ add_def_to_table = true;
+ add_def_loc = insdefault.first;
+ }
+ }
}
}
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);
+ Sized_target<size, big_endian>* sized_target =
+ parameters->sized_target<size, big_endian>();
sym = sized_target->make_symbol();
if (sym == NULL)
return NULL;
else
gold_assert(oldsym != NULL);
+ if (add_def_to_table)
+ add_def_loc->second = sym;
+
*poldsym = this->get_sized_symbol<size>(oldsym);
return sym;
Symbol*
Symbol_table::define_in_output_data(const char* name,
const char* version,
+ Defined defined,
Output_data* od,
uint64_t value,
uint64_t symsize,
if (parameters->target().get_size() == 32)
{
#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
- return this->do_define_in_output_data<32>(name, version, od,
+ return this->do_define_in_output_data<32>(name, version, defined, od,
value, symsize, type, binding,
visibility, nonvis,
offset_is_from_end,
else if (parameters->target().get_size() == 64)
{
#if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
- return this->do_define_in_output_data<64>(name, version, od,
+ return this->do_define_in_output_data<64>(name, version, defined, od,
value, symsize, type, binding,
visibility, nonvis,
offset_is_from_end,
Symbol_table::do_define_in_output_data(
const char* name,
const char* version,
+ Defined defined,
Output_data* od,
typename elfcpp::Elf_types<size>::Elf_Addr value,
typename elfcpp::Elf_types<size>::Elf_WXword symsize,
{
Sized_symbol<size>* sym;
Sized_symbol<size>* oldsym;
+ bool resolve_oldsym;
if (parameters->target().is_big_endian())
{
#if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG)
sym = this->define_special_symbol<size, true>(&name, &version,
- only_if_ref, &oldsym);
+ only_if_ref, &oldsym,
+ &resolve_oldsym);
#else
gold_unreachable();
#endif
{
#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE)
sym = this->define_special_symbol<size, false>(&name, &version,
- only_if_ref, &oldsym);
+ only_if_ref, &oldsym,
+ &resolve_oldsym);
#else
gold_unreachable();
#endif
return sym;
}
- if (Symbol_table::should_override_with_special(oldsym))
+ if (Symbol_table::should_override_with_special(oldsym, defined))
this->override_with_special(oldsym, sym);
- delete sym;
- return oldsym;
+
+ if (resolve_oldsym)
+ return sym;
+ else
+ {
+ delete sym;
+ return oldsym;
+ }
}
// Define a symbol based on an Output_segment.
Symbol*
Symbol_table::define_in_output_segment(const char* name,
- const char* version, Output_segment* os,
+ const char* version,
+ Defined defined,
+ Output_segment* os,
uint64_t value,
uint64_t symsize,
elfcpp::STT type,
if (parameters->target().get_size() == 32)
{
#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
- return this->do_define_in_output_segment<32>(name, version, os,
+ return this->do_define_in_output_segment<32>(name, version, defined, os,
value, symsize, type,
binding, visibility, nonvis,
offset_base, only_if_ref);
else if (parameters->target().get_size() == 64)
{
#if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
- return this->do_define_in_output_segment<64>(name, version, os,
+ return this->do_define_in_output_segment<64>(name, version, defined, os,
value, symsize, type,
binding, visibility, nonvis,
offset_base, only_if_ref);
Symbol_table::do_define_in_output_segment(
const char* name,
const char* version,
+ Defined defined,
Output_segment* os,
typename elfcpp::Elf_types<size>::Elf_Addr value,
typename elfcpp::Elf_types<size>::Elf_WXword symsize,
{
Sized_symbol<size>* sym;
Sized_symbol<size>* oldsym;
+ bool resolve_oldsym;
if (parameters->target().is_big_endian())
{
#if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG)
sym = this->define_special_symbol<size, true>(&name, &version,
- only_if_ref, &oldsym);
+ only_if_ref, &oldsym,
+ &resolve_oldsym);
#else
gold_unreachable();
#endif
{
#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE)
sym = this->define_special_symbol<size, false>(&name, &version,
- only_if_ref, &oldsym);
+ only_if_ref, &oldsym,
+ &resolve_oldsym);
#else
gold_unreachable();
#endif
return sym;
}
- if (Symbol_table::should_override_with_special(oldsym))
+ if (Symbol_table::should_override_with_special(oldsym, defined))
this->override_with_special(oldsym, sym);
- delete sym;
- return oldsym;
+
+ if (resolve_oldsym)
+ return sym;
+ else
+ {
+ delete sym;
+ return oldsym;
+ }
}
// Define a special symbol with a constant value. It is a multiple
Symbol*
Symbol_table::define_as_constant(const char* name,
const char* version,
+ Defined defined,
uint64_t value,
uint64_t symsize,
elfcpp::STT type,
if (parameters->target().get_size() == 32)
{
#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
- return this->do_define_as_constant<32>(name, version, value,
+ return this->do_define_as_constant<32>(name, version, defined, value,
symsize, type, binding,
visibility, nonvis, only_if_ref,
force_override);
else if (parameters->target().get_size() == 64)
{
#if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
- return this->do_define_as_constant<64>(name, version, value,
+ return this->do_define_as_constant<64>(name, version, defined, value,
symsize, type, binding,
visibility, nonvis, only_if_ref,
force_override);
Symbol_table::do_define_as_constant(
const char* name,
const char* version,
+ Defined defined,
typename elfcpp::Elf_types<size>::Elf_Addr value,
typename elfcpp::Elf_types<size>::Elf_WXword symsize,
elfcpp::STT type,
{
Sized_symbol<size>* sym;
Sized_symbol<size>* oldsym;
+ bool resolve_oldsym;
if (parameters->target().is_big_endian())
{
#if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG)
sym = this->define_special_symbol<size, true>(&name, &version,
- only_if_ref, &oldsym);
+ only_if_ref, &oldsym,
+ &resolve_oldsym);
#else
gold_unreachable();
#endif
{
#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE)
sym = this->define_special_symbol<size, false>(&name, &version,
- only_if_ref, &oldsym);
+ only_if_ref, &oldsym,
+ &resolve_oldsym);
#else
gold_unreachable();
#endif
return sym;
}
- if (force_override || Symbol_table::should_override_with_special(oldsym))
+ if (force_override
+ || Symbol_table::should_override_with_special(oldsym, defined))
this->override_with_special(oldsym, sym);
- delete sym;
- return oldsym;
+
+ if (resolve_oldsym)
+ return sym;
+ else
+ {
+ delete sym;
+ return oldsym;
+ }
}
// Define a set of symbols in output sections.
{
Output_section* os = layout->find_output_section(p->output_section);
if (os != NULL)
- this->define_in_output_data(p->name, NULL, os, p->value,
+ this->define_in_output_data(p->name, NULL, PREDEFINED, os, p->value,
p->size, p->type, p->binding,
p->visibility, p->nonvis,
p->offset_is_from_end,
only_if_ref || p->only_if_ref);
else
- this->define_as_constant(p->name, NULL, 0, p->size, p->type,
- p->binding, p->visibility, p->nonvis,
+ this->define_as_constant(p->name, NULL, PREDEFINED, 0, p->size,
+ p->type, p->binding, p->visibility, p->nonvis,
only_if_ref || p->only_if_ref,
false);
}
p->segment_flags_set,
p->segment_flags_clear);
if (os != NULL)
- this->define_in_output_segment(p->name, NULL, os, p->value,
+ this->define_in_output_segment(p->name, NULL, PREDEFINED, os, p->value,
p->size, p->type, p->binding,
p->visibility, p->nonvis,
p->offset_base,
only_if_ref || p->only_if_ref);
else
- this->define_as_constant(p->name, NULL, 0, p->size, p->type,
- p->binding, p->visibility, p->nonvis,
+ this->define_as_constant(p->name, NULL, PREDEFINED, 0, p->size,
+ p->type, p->binding, p->visibility, p->nonvis,
only_if_ref || p->only_if_ref,
false);
}
if (binding == elfcpp::STB_WEAK)
binding = elfcpp::STB_GLOBAL;
- this->define_in_output_data(csym->name(), csym->version(),
+ this->define_in_output_data(csym->name(), csym->version(), COPY,
posd, value, csym->symsize(),
csym->type(), binding,
csym->visibility(), csym->nonvis(),
// Add any undefined symbols named on the command line.
void
-Symbol_table::add_undefined_symbols_from_command_line()
+Symbol_table::add_undefined_symbols_from_command_line(Layout* layout)
{
- if (parameters->options().any_undefined())
+ if (parameters->options().any_undefined()
+ || layout->script_options()->any_unreferenced())
{
if (parameters->target().get_size() == 32)
{
#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
- this->do_add_undefined_symbols_from_command_line<32>();
+ this->do_add_undefined_symbols_from_command_line<32>(layout);
#else
gold_unreachable();
#endif
else if (parameters->target().get_size() == 64)
{
#if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
- this->do_add_undefined_symbols_from_command_line<64>();
+ this->do_add_undefined_symbols_from_command_line<64>(layout);
#else
gold_unreachable();
#endif
template<int size>
void
-Symbol_table::do_add_undefined_symbols_from_command_line()
+Symbol_table::do_add_undefined_symbols_from_command_line(Layout* layout)
{
for (options::String_set::const_iterator p =
parameters->options().undefined_begin();
p != parameters->options().undefined_end();
++p)
- {
- const char* name = p->c_str();
+ this->add_undefined_symbol_from_command_line<size>(p->c_str());
- if (this->lookup(name) != NULL)
- continue;
+ for (Script_options::referenced_const_iterator p =
+ layout->script_options()->referenced_begin();
+ p != layout->script_options()->referenced_end();
+ ++p)
+ this->add_undefined_symbol_from_command_line<size>(p->c_str());
+}
- const char* version = NULL;
+template<int size>
+void
+Symbol_table::add_undefined_symbol_from_command_line(const char* name)
+{
+ if (this->lookup(name) != NULL)
+ return;
- Sized_symbol<size>* sym;
- Sized_symbol<size>* oldsym;
- if (parameters->target().is_big_endian())
- {
+ const char* version = NULL;
+
+ Sized_symbol<size>* sym;
+ Sized_symbol<size>* oldsym;
+ bool resolve_oldsym;
+ if (parameters->target().is_big_endian())
+ {
#if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG)
- sym = this->define_special_symbol<size, true>(&name, &version,
- false, &oldsym);
+ sym = this->define_special_symbol<size, true>(&name, &version,
+ false, &oldsym,
+ &resolve_oldsym);
#else
- gold_unreachable();
+ gold_unreachable();
#endif
- }
- else
- {
+ }
+ else
+ {
#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE)
- sym = this->define_special_symbol<size, false>(&name, &version,
- false, &oldsym);
+ sym = this->define_special_symbol<size, false>(&name, &version,
+ false, &oldsym,
+ &resolve_oldsym);
#else
- gold_unreachable();
+ gold_unreachable();
#endif
- }
+ }
- gold_assert(oldsym == NULL);
+ gold_assert(oldsym == NULL);
- sym->init_undefined(name, version, elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
- elfcpp::STV_DEFAULT, 0);
- ++this->saw_undefined_;
- }
+ sym->init_undefined(name, version, elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
+ elfcpp::STV_DEFAULT, 0);
+ ++this->saw_undefined_;
}
// Set the dynamic symbol indexes. INDEX is the index of the first
// some symbols appear more than once in the symbol table, with
// and without a version.
- if (!sym->should_add_dynsym_entry())
+ if (!sym->should_add_dynsym_entry(this))
sym->set_dynsym_index(-1U);
else if (!sym->has_dynsym_index())
{
// Record any version information.
if (sym->version() != NULL)
versions->record_version(this, dynpool, sym);
+
+ // If the symbol is defined in a dynamic object and is
+ // referenced in a regular object, then mark the dynamic
+ // object as needed. This is used to implement --as-needed.
+ if (sym->is_from_dynobj() && sym->in_reg())
+ sym->object()->set_is_needed();
}
}
off_t
Symbol_table::finalize(off_t off, off_t dynoff, size_t dyn_global_index,
size_t dyncount, Stringpool* pool,
- unsigned int *plocal_symcount)
+ unsigned int* plocal_symcount)
{
off_t ret;
return off;
}
-// Finalize the symbol SYM. This returns true if the symbol should be
-// added to the symbol table, false otherwise.
+// Compute the final value of SYM and store status in location PSTATUS.
+// During relaxation, this may be called multiple times for a symbol to
+// compute its would-be final value in each relaxation pass.
template<int size>
-bool
-Symbol_table::sized_finalize_symbol(Symbol* unsized_sym)
+typename Sized_symbol<size>::Value_type
+Symbol_table::compute_final_value(
+ const Sized_symbol<size>* sym,
+ Compute_final_value_status* pstatus) const
{
typedef typename Sized_symbol<size>::Value_type Value_type;
-
- Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(unsized_sym);
-
- // 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())
- return false;
-
- if (!sym->in_reg())
- {
- gold_assert(!sym->has_symtab_index());
- sym->set_symtab_index(-1U);
- gold_assert(sym->dynsym_index() == -1U);
- return false;
- }
-
Value_type value;
switch (sym->source())
bool is_ordinary;
unsigned int shndx = sym->shndx(&is_ordinary);
- // FIXME: We need some target specific support here.
if (!is_ordinary
&& shndx != elfcpp::SHN_ABS
- && shndx != elfcpp::SHN_COMMON)
+ && !Symbol::is_common_shndx(shndx))
{
- gold_error(_("%s: unsupported symbol section 0x%x"),
- sym->demangled_name().c_str(), shndx);
- shndx = elfcpp::SHN_UNDEF;
+ *pstatus = CFVS_UNSUPPORTED_SYMBOL_SECTION;
+ return 0;
}
Object* symobj = sym->object();
else if (shndx == elfcpp::SHN_UNDEF)
value = 0;
else if (!is_ordinary
- && (shndx == elfcpp::SHN_ABS || shndx == elfcpp::SHN_COMMON))
+ && (shndx == elfcpp::SHN_ABS
+ || Symbol::is_common_shndx(shndx)))
value = sym->value();
else
{
Relobj* relobj = static_cast<Relobj*>(symobj);
Output_section* os = relobj->output_section(shndx);
- if (os == NULL)
+ if (this->is_section_folded(relobj, shndx))
+ {
+ gold_assert(os == NULL);
+ // Get the os of the section it is folded onto.
+ Section_id folded = this->icf_->get_folded_section(relobj,
+ shndx);
+ gold_assert(folded.first != NULL);
+ Relobj* folded_obj = reinterpret_cast<Relobj*>(folded.first);
+ unsigned folded_shndx = folded.second;
+
+ os = folded_obj->output_section(folded_shndx);
+ gold_assert(os != NULL);
+
+ // Replace (relobj, shndx) with canonical ICF input section.
+ shndx = folded_shndx;
+ relobj = folded_obj;
+ }
+
+ uint64_t secoff64 = relobj->output_section_offset(shndx);
+ if (os == NULL)
{
- sym->set_symtab_index(-1U);
bool static_or_reloc = (parameters->doing_static_link() ||
parameters->options().relocatable());
gold_assert(static_or_reloc || sym->dynsym_index() == -1U);
- return false;
+ *pstatus = CFVS_NO_OUTPUT_SECTION;
+ return 0;
}
- uint64_t secoff64 = relobj->output_section_offset(shndx);
if (secoff64 == -1ULL)
{
// The section needs special handling (e.g., a merge section).
+
value = os->output_address(relobj, shndx, sym->value());
}
else
gold_unreachable();
}
+ *pstatus = CFVS_OK;
+ return value;
+}
+
+// Finalize the symbol SYM. This returns true if the symbol should be
+// added to the symbol table, false otherwise.
+
+template<int size>
+bool
+Symbol_table::sized_finalize_symbol(Symbol* unsized_sym)
+{
+ typedef typename Sized_symbol<size>::Value_type Value_type;
+
+ Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(unsized_sym);
+
+ // 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())
+ return false;
+
+ if (!sym->in_reg())
+ {
+ gold_assert(!sym->has_symtab_index());
+ sym->set_symtab_index(-1U);
+ gold_assert(sym->dynsym_index() == -1U);
+ return false;
+ }
+
+ // If the symbol is only present on plugin files, the plugin decided we
+ // don't need it.
+ if (!sym->in_real_elf())
+ {
+ gold_assert(!sym->has_symtab_index());
+ sym->set_symtab_index(-1U);
+ return false;
+ }
+
+ // Compute final symbol value.
+ Compute_final_value_status status;
+ Value_type value = this->compute_final_value(sym, &status);
+
+ switch (status)
+ {
+ case CFVS_OK:
+ break;
+ case CFVS_UNSUPPORTED_SYMBOL_SECTION:
+ {
+ bool is_ordinary;
+ unsigned int shndx = sym->shndx(&is_ordinary);
+ gold_error(_("%s: unsupported symbol section 0x%x"),
+ sym->demangled_name().c_str(), shndx);
+ }
+ break;
+ case CFVS_NO_OUTPUT_SECTION:
+ sym->set_symtab_index(-1U);
+ return false;
+ default:
+ gold_unreachable();
+ }
+
sym->set_value(value);
- if (parameters->options().strip_all())
+ if (parameters->options().strip_all()
+ || !parameters->options().should_retain_symbol(sym->name()))
{
sym->set_symtab_index(-1U);
return false;
// Write out the global symbols.
void
-Symbol_table::write_globals(const Input_objects* input_objects,
- const Stringpool* sympool,
+Symbol_table::write_globals(const Stringpool* sympool,
const Stringpool* dynpool,
Output_symtab_xindex* symtab_xindex,
Output_symtab_xindex* dynsym_xindex,
{
#ifdef HAVE_TARGET_32_LITTLE
case Parameters::TARGET_32_LITTLE:
- this->sized_write_globals<32, false>(input_objects, sympool,
- dynpool, symtab_xindex,
+ this->sized_write_globals<32, false>(sympool, dynpool, symtab_xindex,
dynsym_xindex, of);
break;
#endif
#ifdef HAVE_TARGET_32_BIG
case Parameters::TARGET_32_BIG:
- this->sized_write_globals<32, true>(input_objects, sympool,
- dynpool, symtab_xindex,
+ this->sized_write_globals<32, true>(sympool, dynpool, symtab_xindex,
dynsym_xindex, of);
break;
#endif
#ifdef HAVE_TARGET_64_LITTLE
case Parameters::TARGET_64_LITTLE:
- this->sized_write_globals<64, false>(input_objects, sympool,
- dynpool, symtab_xindex,
+ this->sized_write_globals<64, false>(sympool, dynpool, symtab_xindex,
dynsym_xindex, of);
break;
#endif
#ifdef HAVE_TARGET_64_BIG
case Parameters::TARGET_64_BIG:
- this->sized_write_globals<64, true>(input_objects, sympool,
- dynpool, symtab_xindex,
+ this->sized_write_globals<64, true>(sympool, dynpool, symtab_xindex,
dynsym_xindex, of);
break;
#endif
template<int size, bool big_endian>
void
-Symbol_table::sized_write_globals(const Input_objects* input_objects,
- const Stringpool* sympool,
+Symbol_table::sized_write_globals(const Stringpool* sympool,
const Stringpool* dynpool,
Output_symtab_xindex* symtab_xindex,
Output_symtab_xindex* dynsym_xindex,
Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(p->second);
// Possibly warn about unresolved symbols in shared libraries.
- this->warn_about_undefined_dynobj_symbol(input_objects, sym);
+ this->warn_about_undefined_dynobj_symbol(sym);
unsigned int sym_index = sym->symtab_index();
unsigned int dynsym_index;
unsigned int shndx;
typename elfcpp::Elf_types<size>::Elf_Addr sym_value = sym->value();
typename elfcpp::Elf_types<size>::Elf_Addr dynsym_value = sym_value;
+ elfcpp::STB binding = sym->binding();
switch (sym->source())
{
case Symbol::FROM_OBJECT:
bool is_ordinary;
unsigned int in_shndx = sym->shndx(&is_ordinary);
- // FIXME: We need some target specific support here.
if (!is_ordinary
&& in_shndx != elfcpp::SHN_ABS
- && in_shndx != elfcpp::SHN_COMMON)
+ && !Symbol::is_common_shndx(in_shndx))
{
gold_error(_("%s: unsupported symbol section 0x%x"),
sym->demangled_name().c_str(), in_shndx);
if (sym->needs_dynsym_value())
dynsym_value = target.dynsym_value(sym);
shndx = elfcpp::SHN_UNDEF;
+ if (sym->is_undef_binding_weak())
+ binding = elfcpp::STB_WEAK;
+ else
+ binding = elfcpp::STB_GLOBAL;
}
else if (symobj->pluginobj() != NULL)
shndx = elfcpp::SHN_UNDEF;
else if (in_shndx == elfcpp::SHN_UNDEF
|| (!is_ordinary
&& (in_shndx == elfcpp::SHN_ABS
- || in_shndx == elfcpp::SHN_COMMON)))
+ || Symbol::is_common_shndx(in_shndx))))
shndx = in_shndx;
else
{
Relobj* relobj = static_cast<Relobj*>(symobj);
Output_section* os = relobj->output_section(in_shndx);
+ if (this->is_section_folded(relobj, in_shndx))
+ {
+ // This global symbol must be written out even though
+ // it is folded.
+ // Get the os of the section it is folded onto.
+ Section_id folded =
+ this->icf_->get_folded_section(relobj, in_shndx);
+ gold_assert(folded.first !=NULL);
+ Relobj* folded_obj =
+ reinterpret_cast<Relobj*>(folded.first);
+ os = folded_obj->output_section(folded.second);
+ gold_assert(os != NULL);
+ }
gold_assert(os != NULL);
shndx = os->out_shndx();
gold_assert(sym_index < output_count);
unsigned char* ps = psyms + (sym_index * sym_size);
this->sized_write_symbol<size, big_endian>(sym, sym_value, shndx,
- sympool, ps);
+ binding, sympool, ps);
}
if (dynsym_index != -1U)
gold_assert(dynsym_index < dynamic_count);
unsigned char* pd = dynamic_view + (dynsym_index * sym_size);
this->sized_write_symbol<size, big_endian>(sym, dynsym_value, shndx,
- dynpool, pd);
+ binding, dynpool, pd);
}
}
Sized_symbol<size>* sym,
typename elfcpp::Elf_types<size>::Elf_Addr value,
unsigned int shndx,
+ elfcpp::STB binding,
const Stringpool* pool,
unsigned char* p) const
{
osym.put_st_size(0);
else
osym.put_st_size(sym->symsize());
+ elfcpp::STT type = sym->type();
+ // Turn IFUNC symbols from shared libraries into normal FUNC symbols.
+ if (type == elfcpp::STT_GNU_IFUNC
+ && sym->is_from_dynobj())
+ type = elfcpp::STT_FUNC;
// A version script may have overridden the default binding.
if (sym->is_forced_local())
- osym.put_st_info(elfcpp::elf_st_info(elfcpp::STB_LOCAL, sym->type()));
+ osym.put_st_info(elfcpp::elf_st_info(elfcpp::STB_LOCAL, type));
else
- osym.put_st_info(elfcpp::elf_st_info(sym->binding(), sym->type()));
+ osym.put_st_info(elfcpp::elf_st_info(binding, type));
osym.put_st_other(elfcpp::elf_st_other(sym->visibility(), sym->nonvis()));
osym.put_st_shndx(shndx);
}
// entry, we aren't going to be able to reliably report whether the
// symbol is undefined.
-// We also don't warn about libraries found in the system library
-// directory (the directory were we find libc.so); we assume that
-// those libraries are OK. This heuristic avoids problems in
-// GNU/Linux, in which -ldl can have undefined references satisfied by
-// ld-linux.so.
+// We also don't warn about libraries found in a system library
+// directory (e.g., /lib or /usr/lib); we assume that those libraries
+// are OK. This heuristic avoids problems on GNU/Linux, in which -ldl
+// can have undefined references satisfied by ld-linux.so.
inline void
-Symbol_table::warn_about_undefined_dynobj_symbol(
- const Input_objects* input_objects,
- Symbol* sym) const
+Symbol_table::warn_about_undefined_dynobj_symbol(Symbol* sym) const
{
bool dummy;
if (sym->source() == Symbol::FROM_OBJECT
&& sym->binding() != elfcpp::STB_WEAK
&& !parameters->options().allow_shlib_undefined()
&& !parameters->target().is_defined_by_abi(sym)
- && !input_objects->found_in_system_library_directory(sym->object()))
+ && !sym->object()->is_in_system_directory())
{
// A very ugly cast.
Dynobj* dynobj = static_cast<Dynobj*>(sym->object());
// Write out a section symbol. Return the update offset.
void
-Symbol_table::write_section_symbol(const Output_section *os,
+Symbol_table::write_section_symbol(const Output_section* os,
Output_symtab_xindex* symtab_xindex,
Output_file* of,
off_t offset) const
elfcpp::Sym_write<size, big_endian> osym(pov);
osym.put_st_name(0);
- osym.put_st_value(os->address());
+ if (parameters->options().relocatable())
+ osym.put_st_value(0);
+ else
+ 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));
// We check for ODR violations by looking for symbols with the same
// name for which the debugging information reports that they were
// defined in different source locations. When comparing the source
-// location, we consider instances with the same base filename and
-// line number to be the same. This is because different object
-// files/shared libraries can include the same header file using
-// different paths, and we don't want to report an ODR violation in
-// that case.
+// location, we consider instances with the same base filename to be
+// the same. This is because different object files/shared libraries
+// can include the same header file using different paths, and
+// different optimization settings can make the line number appear to
+// be a couple lines off, and we don't want to report an ODR violation
+// in those cases.
// This struct is used to compare line information, as returned by
// Dwarf_line_info::one_addr2line. It implements a < comparison
bool
operator()(const std::string& s1, const std::string& s2) const
{
- std::string::size_type pos1 = s1.rfind('/');
- std::string::size_type pos2 = s2.rfind('/');
- if (pos1 == std::string::npos
- || pos2 == std::string::npos)
- return s1 < s2;
- return s1.compare(pos1, std::string::npos,
- s2, pos2, std::string::npos) < 0;
+ // Inputs should be of the form "dirname/filename:linenum" where
+ // "dirname/" is optional. We want to compare just the filename.
+
+ // Find the last '/' and ':' in each string.
+ std::string::size_type s1begin = s1.rfind('/');
+ std::string::size_type s2begin = s2.rfind('/');
+ std::string::size_type s1end = s1.rfind(':');
+ std::string::size_type s2end = s2.rfind(':');
+ // If there was no '/' in a string, start at the beginning.
+ if (s1begin == std::string::npos)
+ s1begin = 0;
+ if (s2begin == std::string::npos)
+ s2begin = 0;
+ // If the ':' appeared in the directory name, compare to the end
+ // of the string.
+ if (s1end < s1begin)
+ s1end = s1.size();
+ if (s2end < s2begin)
+ s2end = s2.size();
+ // Compare takes lengths, not end indices.
+ return s1.compare(s1begin, s1end - s1begin,
+ s2, s2begin, s2end - s2begin) < 0;
}
};
++it)
{
const char* symbol_name = it->first;
- // We use a sorted set so the output is deterministic.
- std::set<std::string, Odr_violation_compare> line_nums;
+ // Maps from symbol location to a sample object file we found
+ // that location in. We use a sorted map so the location order
+ // is deterministic, but we only store an arbitrary object file
+ // to avoid copying lots of names.
+ std::map<std::string, std::string, Odr_violation_compare> line_nums;
for (Unordered_set<Symbol_location, Symbol_location_hash>::const_iterator
locs = it->second.begin();
std::string lineno = Dwarf_line_info::one_addr2line(
locs->object, locs->shndx, locs->offset, 16);
if (!lineno.empty())
- line_nums.insert(lineno);
+ {
+ std::string& sample_object = line_nums[lineno];
+ if (sample_object.empty())
+ sample_object = locs->object->name();
+ }
}
if (line_nums.size() > 1)
gold_warning(_("while linking %s: symbol '%s' defined in multiple "
"places (possible ODR violation):"),
output_file_name, demangle(symbol_name).c_str());
- for (std::set<std::string>::const_iterator it2 = line_nums.begin();
- it2 != line_nums.end();
- ++it2)
- fprintf(stderr, " %s\n", it2->c_str());
+ for (std::map<std::string, std::string>::const_iterator it2 =
+ line_nums.begin();
+ it2 != line_nums.end();
+ ++it2)
+ fprintf(stderr, _(" %s from %s\n"),
+ it2->first.c_str(), it2->second.c_str());
}
}
// We only call one_addr2line() in this function, so we can clear its cache.
projects / deliverable / binutils-gdb.git / blobdiff