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Can now do a full static link of hello, world in C or C++

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This commit is contained in:
Ian Lance Taylor
2006-11-03 18:26:11 +00:00
parent 58ea3d6a2f
commit ead1e4244a
36 changed files with 3548 additions and 575 deletions
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71
gold/resolve.cc
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@@ -19,12 +19,14 @@ void
Symbol::override_base(const elfcpp::Sym<size, big_endian>& sym,
Object* object)
{
this->object_ = object;
this->shnum_ = sym.get_st_shndx(); // FIXME: Handle SHN_XINDEX.
assert(this->source_ == FROM_OBJECT);
this->u_.from_object.object = object;
// FIXME: Handle SHN_XINDEX.
this->u_.from_object.shnum = sym.get_st_shndx();
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->nonvis_ = sym.get_st_nonvis();
}
// Override the fields in Sized_symbol.
@@ -37,7 +39,7 @@ Sized_symbol<size>::override(const elfcpp::Sym<size, big_endian>& sym,
{
this->override_base(sym, object);
this->value_ = sym.get_st_value();
this->size_ = sym.get_st_size();
this->symsize_ = sym.get_st_size();
}
// Resolve a symbol. This is called the second and subsequent times
@@ -315,9 +317,16 @@ Symbol_table::resolve(Sized_symbol<size>* to,
case DYN_DEF * 16 + UNDEF:
case DYN_WEAK_DEF * 16 + UNDEF:
case UNDEF * 16 + UNDEF:
// A new undefined reference tells us nothing.
return;
case WEAK_UNDEF * 16 + UNDEF:
case DYN_UNDEF * 16 + UNDEF:
case DYN_WEAK_UNDEF * 16 + UNDEF:
// A strong undef overrides a dynamic or weak undef.
to->override(sym, object);
return;
case COMMON * 16 + UNDEF:
case WEAK_COMMON * 16 + UNDEF:
case DYN_COMMON * 16 + UNDEF:
@@ -391,50 +400,100 @@ Symbol_table::resolve(Sized_symbol<size>* to,
return;
case COMMON * 16 + COMMON:
// Set the size to the maximum.
if (sym.get_st_size() > to->symsize())
to->set_symsize(sym.get_st_size());
return;
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);
return;
case DYN_COMMON * 16 + COMMON:
case DYN_WEAK_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);
if (to->symsize() < symsize)
to->set_symsize(symsize);
}
return;
case DEF * 16 + WEAK_COMMON:
case WEAK_DEF * 16 + WEAK_COMMON:
case DYN_DEF * 16 + WEAK_COMMON:
case DYN_WEAK_DEF * 16 + WEAK_COMMON:
// Whatever a weak common symbol is, it won't override a
// definition.
return;
case UNDEF * 16 + WEAK_COMMON:
case WEAK_UNDEF * 16 + WEAK_COMMON:
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);
return;
case COMMON * 16 + WEAK_COMMON:
case WEAK_COMMON * 16 + WEAK_COMMON:
case DYN_COMMON * 16 + WEAK_COMMON:
case DYN_WEAK_COMMON * 16 + WEAK_COMMON:
// Ignore a weak common symbol in the presence of a real common
// symbol.
return;
case DEF * 16 + DYN_COMMON:
case WEAK_DEF * 16 + DYN_COMMON:
case DYN_DEF * 16 + DYN_COMMON:
case DYN_WEAK_DEF * 16 + DYN_COMMON:
// Ignore a dynamic common symbol in the presence of a
// definition.
return;
case UNDEF * 16 + DYN_COMMON:
case WEAK_UNDEF * 16 + DYN_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);
return;
case COMMON * 16 + DYN_COMMON:
case WEAK_COMMON * 16 + DYN_COMMON:
case DYN_COMMON * 16 + DYN_COMMON:
case DYN_WEAK_COMMON * 16 + DYN_COMMON:
// Set the size to the maximum.
if (sym.get_st_size() > to->symsize())
to->set_symsize(sym.get_st_size());
return;
case DEF * 16 + DYN_WEAK_COMMON:
case WEAK_DEF * 16 + DYN_WEAK_COMMON:
case DYN_DEF * 16 + DYN_WEAK_COMMON:
case DYN_WEAK_DEF * 16 + DYN_WEAK_COMMON:
// A common symbol is ignored in the face of a definition.
return;
case UNDEF * 16 + DYN_WEAK_COMMON:
case WEAK_UNDEF * 16 + DYN_WEAK_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);
return;
case COMMON * 16 + DYN_WEAK_COMMON:
case WEAK_COMMON * 16 + DYN_WEAK_COMMON:
case DYN_COMMON * 16 + DYN_WEAK_COMMON:
case DYN_WEAK_COMMON * 16 + DYN_WEAK_COMMON:
abort();
break;
// Set the size to the maximum.
if (sym.get_st_size() > to->symsize())
to->set_symsize(sym.get_st_size());
return;
default:
abort();