template<int size, bool big_endian>
void
Symbol::override_base(const elfcpp::Sym<size, big_endian>& sym,
- Object* object)
+ Object* object, const char* version)
{
- assert(this->source_ == FROM_OBJECT);
+ gold_assert(this->source_ == FROM_OBJECT);
this->u_.from_object.object = object;
+ if (version != NULL && this->version() != version)
+ {
+ gold_assert(this->version() == NULL);
+ this->version_ = version;
+ }
// FIXME: Handle SHN_XINDEX.
- this->u_.from_object.shnum = sym.get_st_shndx();
+ this->u_.from_object.shndx = sym.get_st_shndx();
this->type_ = sym.get_st_type();
this->binding_ = sym.get_st_bind();
this->visibility_ = sym.get_st_visibility();
template<bool big_endian>
void
Sized_symbol<size>::override(const elfcpp::Sym<size, big_endian>& sym,
- Object* object)
+ Object* object, const char* version)
{
- this->override_base(sym, object);
+ this->override_base(sym, object, version);
this->value_ = sym.get_st_value();
this->symsize_ = sym.get_st_size();
}
// Resolve a symbol. This is called the second and subsequent times
// we see a symbol. TO is the pre-existing symbol. SYM is the new
-// symbol, seen in OBJECT.
+// symbol, seen in OBJECT. VERSION of the version of SYM.
template<int size, bool big_endian>
void
Symbol_table::resolve(Sized_symbol<size>* to,
const elfcpp::Sym<size, big_endian>& sym,
- Object* object)
+ Object* object, const char* version)
{
if (object->target()->has_resolve())
{
Sized_target<size, big_endian>* sized_target;
- sized_target = object->sized_target SELECT_SIZE_ENDIAN_NAME (
- SELECT_SIZE_ENDIAN_ONLY(size, big_endian));
- sized_target->resolve(to, sym, object);
+ sized_target = object->sized_target
+ SELECT_SIZE_ENDIAN_NAME(size, big_endian) (
+ SELECT_SIZE_ENDIAN_ONLY(size, big_endian));
+ sized_target->resolve(to, sym, object, version);
return;
}
case elfcpp::STB_LOCAL:
// We should only see externally visible symbols in the symbol
// table.
- abort();
+ gold_unreachable();
default:
// Any target which wants to handle STB_LOOS, etc., needs to
// define a resolve method.
- abort();
+ gold_unreachable();
}
- if (to->object() != NULL && to->object()->is_dynamic())
+ if (to->source() == Symbol::FROM_OBJECT
+ && to->object()->is_dynamic())
tobits |= (1 << 1);
- switch (to->shnum())
+ switch (to->shndx())
{
case elfcpp::SHN_UNDEF:
tobits |= (1 << 2);
gold_exit(false);
}
- if (object->is_dynamic())
+ if (!object->is_dynamic())
+ {
+ // Record that we've seen this symbol in a regular object.
+ to->set_in_reg();
+ }
+ else
{
frombits |= (1 << 1);
break;
}
+ if ((tobits & (1 << 1)) != (frombits & (1 << 1)))
+ {
+ // This symbol is seen in both a dynamic object and a regular
+ // object. That means that we need the symbol to go into the
+ // dynamic symbol table, so that the dynamic linker can use the
+ // regular symbol to override or define the dynamic symbol.
+ to->set_needs_dynsym_entry();
+ }
+
// FIXME: Warn if either but not both of TO and SYM are STT_TLS.
// We use a giant switch table for symbol resolution. This code is
// are currently compatible with the GNU linker. In the future
// we should add a target specific option to change this.
// FIXME.
- to->override(sym, object);
+ to->override(sym, object, version);
return;
case DYN_DEF * 16 + DEF:
// definition in a regular object. The definition in the
// regular object overrides the definition in the dynamic
// object.
- to->override(sym, object);
+ to->override(sym, object, version);
return;
case UNDEF * 16 + DEF:
case DYN_WEAK_UNDEF * 16 + DEF:
// We've seen an undefined reference, and now we see a
// definition. We use the definition.
- to->override(sym, object);
+ to->override(sym, object, version);
return;
case COMMON * 16 + DEF:
case DYN_COMMON * 16 + DEF:
case DYN_WEAK_COMMON * 16 + DEF:
// We've seen a common symbol and now we see a definition. The
- // definition overrides. FIXME: We should optionally issue a
+ // definition overrides. FIXME: We should optionally issue, version a
// warning.
- to->override(sym, object);
+ to->override(sym, object, version);
return;
case DEF * 16 + WEAK_DEF:
case DYN_WEAK_DEF * 16 + WEAK_DEF:
// We've seen a dynamic definition and now we see a regular weak
// definition. The regular weak definition overrides.
- to->override(sym, object);
+ to->override(sym, object, version);
return;
case UNDEF * 16 + WEAK_DEF:
case DYN_UNDEF * 16 + WEAK_DEF:
case DYN_WEAK_UNDEF * 16 + WEAK_DEF:
// A weak definition of a currently undefined symbol.
- to->override(sym, object);
+ to->override(sym, object, version);
return;
case COMMON * 16 + WEAK_DEF:
case DYN_WEAK_COMMON * 16 + WEAK_DEF:
// A weak definition does override a definition in a dynamic
// object. FIXME: We should optionally issue a warning.
- to->override(sym, object);
+ to->override(sym, object, version);
return;
case DEF * 16 + DYN_DEF:
case DYN_UNDEF * 16 + DYN_DEF:
case DYN_WEAK_UNDEF * 16 + DYN_DEF:
// Use a dynamic definition if we have a reference.
- to->override(sym, object);
+ to->override(sym, object, version);
return;
case COMMON * 16 + DYN_DEF:
case DYN_UNDEF * 16 + DYN_WEAK_DEF:
case DYN_WEAK_UNDEF * 16 + DYN_WEAK_DEF:
// Use a weak dynamic definition if we have a reference.
- to->override(sym, object);
+ to->override(sym, object, version);
return;
case COMMON * 16 + DYN_WEAK_DEF:
case DYN_UNDEF * 16 + UNDEF:
case DYN_WEAK_UNDEF * 16 + UNDEF:
// A strong undef overrides a dynamic or weak undef.
- to->override(sym, object);
+ to->override(sym, object, version);
return;
case COMMON * 16 + UNDEF:
case DYN_WEAK_DEF * 16 + COMMON:
// A common symbol does override a weak definition or a dynamic
// definition.
- to->override(sym, object);
+ to->override(sym, object, version);
return;
case UNDEF * 16 + COMMON:
case DYN_UNDEF * 16 + COMMON:
case DYN_WEAK_UNDEF * 16 + COMMON:
// A common symbol is a definition for a reference.
- to->override(sym, object);
+ to->override(sym, object, version);
return;
case COMMON * 16 + COMMON:
case WEAK_COMMON * 16 + COMMON:
// I'm not sure just what a weak common symbol means, but
// presumably it can be overridden by a regular common symbol.
- to->override(sym, object);
+ to->override(sym, object, version);
return;
case DYN_COMMON * 16 + COMMON:
{
// Use the real common symbol, but adjust the size if necessary.
typename Sized_symbol<size>::Size_type symsize = to->symsize();
- to->override(sym, object);
+ to->override(sym, object, version);
if (to->symsize() < symsize)
to->set_symsize(symsize);
}
case DYN_UNDEF * 16 + WEAK_COMMON:
case DYN_WEAK_UNDEF * 16 + WEAK_COMMON:
// A weak common symbol is better than an undefined symbol.
- to->override(sym, object);
+ to->override(sym, object, version);
return;
case COMMON * 16 + WEAK_COMMON:
case DYN_UNDEF * 16 + DYN_COMMON:
case DYN_WEAK_UNDEF * 16 + DYN_COMMON:
// A dynamic common symbol is a definition of sorts.
- to->override(sym, object);
+ to->override(sym, object, version);
return;
case COMMON * 16 + DYN_COMMON:
case DYN_UNDEF * 16 + DYN_WEAK_COMMON:
case DYN_WEAK_UNDEF * 16 + DYN_WEAK_COMMON:
// I guess a weak common symbol is better than a definition.
- to->override(sym, object);
+ to->override(sym, object, version);
return;
case COMMON * 16 + DYN_WEAK_COMMON:
return;
default:
- abort();
+ gold_unreachable();
}
}
Symbol_table::resolve<32, true>(
Sized_symbol<32>* to,
const elfcpp::Sym<32, true>& sym,
- Object* object);
+ Object* object,
+ const char* version);
template
void
Symbol_table::resolve<32, false>(
Sized_symbol<32>* to,
const elfcpp::Sym<32, false>& sym,
- Object* object);
+ Object* object,
+ const char* version);
template
void
Symbol_table::resolve<64, true>(
Sized_symbol<64>* to,
const elfcpp::Sym<64, true>& sym,
- Object* object);
+ Object* object,
+ const char* version);
template
void
Symbol_table::resolve<64, false>(
Sized_symbol<64>* to,
const elfcpp::Sym<64, false>& sym,
- Object* object);
+ Object* object,
+ const char* version);
} // End namespace gold.