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2010-03-09 Rafael Espindola <espindola@google.com>

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* archive.cc (should_include_member): New.
	(Archive::add_symbols): Use should_include_member.
This commit is contained in:
Rafael Ávila de Espíndola 2010-03-09 19:17:14 +00:00
parent 60c5c0213a
commit 473b7a133c
1 changed files with 80 additions and 51 deletions
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131
gold/archive.cc
View file

@ -602,6 +602,78 @@ Archive::read_symbols(off_t off)
this->members_[off] = member;
}
// When we see a symbol in an archive we might decide to include the member,
// not include the member or be undecided. This enum represents these
// possibilities.
enum Should_include
{
SHOULD_INCLUDE_NO,
SHOULD_INCLUDE_YES,
SHOULD_INCLUDE_UNKNOWN
};
static Should_include
should_include_member(Symbol_table* symtab, const char* sym_name, Symbol** symp,
std::string* why, char** tmpbufp, size_t* tmpbuflen)
{
// In an object file, and therefore in an archive map, an
// '@' in the name separates the symbol name from the
// version name. If there are two '@' characters, this is
// the default version.
char* tmpbuf = *tmpbufp;
const char* ver = strchr(sym_name, '@');
bool def = false;
if (ver != NULL)
{
size_t symlen = ver - sym_name;
if (symlen + 1 > *tmpbuflen)
{
tmpbuf = static_cast<char*>(xrealloc(tmpbuf, symlen + 1));
*tmpbufp = tmpbuf;
*tmpbuflen = symlen + 1;
}
memcpy(tmpbuf, sym_name, symlen);
tmpbuf[symlen] = '\0';
sym_name = tmpbuf;
++ver;
if (*ver == '@')
{
++ver;
def = true;
}
}
Symbol* sym = symtab->lookup(sym_name, ver);
if (def
&& ver != NULL
&& (sym == NULL
|| !sym->is_undefined()
|| sym->binding() == elfcpp::STB_WEAK))
sym = symtab->lookup(sym_name, NULL);
*symp = sym;
if (sym == NULL)
{
// Check whether the symbol was named in a -u option.
if (!parameters->options().is_undefined(sym_name))
return SHOULD_INCLUDE_UNKNOWN;
else
{
*why = "-u ";
*why += sym_name;
}
}
else if (!sym->is_undefined())
return SHOULD_INCLUDE_NO;
else if (sym->binding() == elfcpp::STB_WEAK)
return SHOULD_INCLUDE_UNKNOWN;
return SHOULD_INCLUDE_YES;
}
// Select members from the archive and add them to the link. We walk
// through the elements in the archive map, and look each one up in
// the symbol table. If it exists as a strong undefined symbol, we
@ -661,65 +733,22 @@ Archive::add_symbols(Symbol_table* symtab, Layout* layout,
const char* sym_name = (this->armap_names_.data()
+ this->armap_[i].name_offset);
// In an object file, and therefore in an archive map, an
// '@' in the name separates the symbol name from the
// version name. If there are two '@' characters, this is
// the default version.
const char* ver = strchr(sym_name, '@');
bool def = false;
if (ver != NULL)
{
size_t symlen = ver - sym_name;
if (symlen + 1 > tmpbuflen)
{
tmpbuf = static_cast<char*>(realloc(tmpbuf, symlen + 1));
tmpbuflen = symlen + 1;
}
memcpy(tmpbuf, sym_name, symlen);
tmpbuf[symlen] = '\0';
sym_name = tmpbuf;
Symbol* sym;
std::string why;
Should_include t = should_include_member(symtab, sym_name,
&sym, &why, &tmpbuf,
&tmpbuflen);
++ver;
if (*ver == '@')
{
++ver;
def = true;
}
}
if (t == SHOULD_INCLUDE_NO || t == SHOULD_INCLUDE_YES)
this->armap_checked_[i] = true;
Symbol* sym = symtab->lookup(sym_name, ver);
if (def
&& ver != NULL
&& (sym == NULL
|| !sym->is_undefined()
|| sym->binding() == elfcpp::STB_WEAK))
sym = symtab->lookup(sym_name, NULL);
if (sym == NULL)
{
// Check whether the symbol was named in a -u option.
if (!parameters->options().is_undefined(sym_name))
continue;
}
else if (!sym->is_undefined())
{
this->armap_checked_[i] = true;
continue;
}
else if (sym->binding() == elfcpp::STB_WEAK)
if (t != SHOULD_INCLUDE_YES)
continue;
// We want to include this object in the link.
last_seen_offset = this->armap_[i].file_offset;
this->seen_offsets_.insert(last_seen_offset);
this->armap_checked_[i] = true;
std::string why;
if (sym == NULL)
{
why = "-u ";
why += sym_name;
}
if (!this->include_member(symtab, layout, input_objects,
last_seen_offset, mapfile, sym,
why.c_str()))