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2003-04-25 Alan Modra <amodra@bigpond.net.au>

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* elflink.h (elf_merge_symbol): When we find a regular definition
	for an indirect symbol, flip the indirection so that the old
	direct symbol now points to the new definition.
This commit is contained in:
H.J. Lu 2003-04-25 15:17:51 +00:00
parent 635f10624f
commit 3c0a515daa
2 changed files with 36 additions and 15 deletions
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6
bfd/ChangeLog
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@ -1,3 +1,9 @@
2003-04-25 Alan Modra <amodra@bigpond.net.au>
* elflink.h (elf_merge_symbol): When we find a regular definition
for an indirect symbol, flip the indirection so that the old
direct symbol now points to the new definition.
2003-04-24 Roland McGrath <roland@redhat.com>
* elf.c (bfd_section_from_phdr): Map PT_GNU_EH_FRAME to "eh_frame_hdr".

45
bfd/elflink.h
View file

@ -479,6 +479,7 @@ elf_merge_symbol (abfd, info, name, sym, psec, pvalue, sym_hash,
{
asection *sec;
struct elf_link_hash_entry *h;
struct elf_link_hash_entry *flip;
int bind;
bfd *oldbfd;
bfd_boolean newdyn, olddyn, olddef, newdef, newdyncommon, olddyncommon;
@ -769,6 +770,7 @@ elf_merge_symbol (abfd, info, name, sym, psec, pvalue, sym_hash,
As above, we permit a non-weak definition in a shared object to
override a weak definition in a regular object. */
flip = NULL;
if (! newdyn
&& (newdef
|| (bfd_is_com_section (sec)
@ -797,19 +799,13 @@ elf_merge_symbol (abfd, info, name, sym, psec, pvalue, sym_hash,
if (bfd_is_com_section (sec))
*type_change_ok = TRUE;
/* This union may have been set to be non-NULL when this symbol
was seen in a dynamic object. We must force the union to be
NULL, so that it is correct for a regular symbol. */
h->verinfo.vertree = NULL;
/* In this special case, if H is the target of an indirection,
we want the caller to frob with H rather than with the
indirect symbol. That will permit the caller to redefine the
target of the indirection, rather than the indirect symbol
itself. FIXME: This will break the -y option if we store a
symbol with a different name. */
*sym_hash = h;
if ((*sym_hash)->root.type == bfd_link_hash_indirect)
flip = *sym_hash;
else
/* This union may have been set to be non-NULL when this symbol
was seen in a dynamic object. We must force the union to be
NULL, so that it is correct for a regular symbol. */
h->verinfo.vertree = NULL;
}
/* Handle the special case of a new common symbol merging with an
@ -849,7 +845,26 @@ elf_merge_symbol (abfd, info, name, sym, psec, pvalue, sym_hash,
*size_change_ok = TRUE;
*type_change_ok = TRUE;
h->verinfo.vertree = NULL;
if ((*sym_hash)->root.type == bfd_link_hash_indirect)
flip = *sym_hash;
else
h->verinfo.vertree = NULL;
}
if (flip != NULL)
{
/* Handle the case where we had a versioned symbol in a dynamic
library and now find a definition in a normal object. In this
case, we make the versioned symbol point to the normal one. */
flip->root.type = h->root.type;
flip->root.u.undef.abfd = h->root.u.undef.abfd;
h->root.type = bfd_link_hash_indirect;
h->root.u.i.link = (struct bfd_link_hash_entry *) flip;
if (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)
{
h->elf_link_hash_flags &= ~ELF_LINK_HASH_DEF_DYNAMIC;
flip->elf_link_hash_flags |= ELF_LINK_HASH_REF_DYNAMIC;
}
}
/* Handle the special case of a weak definition in a regular object
@ -883,7 +898,7 @@ elf_merge_symbol (abfd, info, name, sym, psec, pvalue, sym_hash,
/* Handle the special case of a non-weak definition in a shared
object followed by a weak definition in a regular object. In
this case we prefer to definition in the shared object. To make
this case we prefer the definition in the shared object. To make
this work we have to tell the caller to not treat the new symbol
as a definition. */
if (olddef