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* elflink.c (elf_gc_mark_dynamic_ref_symbol): New function. 

(bfd_elf_gc_sections): Fail if a shared object is being created.
	Do not fail if dynamic sections have been created.  Instead call
	elf_gc_mark_dynamic_ref_symbol to mark sections that contain
	dynamically referenced symbols.  Do not mark the whole graph
	rooted at .eh_frame, only the section proper.
This commit is contained in:
Eric Botcazou 2004-04-21 07:14:15 +00:00
parent 58434bc1b4
commit 715df9b8e0
2 changed files with 46 additions and 5 deletions
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9
bfd/ChangeLog
View File

@ -1,3 +1,12 @@
2004-04-21 Eric Botcazou <ebotcazou@act-europe.fr>
* elflink.c (elf_gc_mark_dynamic_ref_symbol): New function.
(bfd_elf_gc_sections): Fail if a shared object is being created.
Do not fail if dynamic sections have been created. Instead call
elf_gc_mark_dynamic_ref_symbol to mark sections that contain
dynamically referenced symbols. Do not mark the whole graph
rooted at .eh_frame, only the section proper.
2004-04-20 DJ Delorie <dj@redhat.com>
* reloc.c: Add BFD_RELOC_32_SECREL.

42
bfd/elflink.c
View File

@ -8412,6 +8412,24 @@ elf_gc_smash_unused_vtentry_relocs (struct elf_link_hash_entry *h, void *okp)
return TRUE;
}
/* Mark sections containing dynamically referenced symbols. This is called
through elf_link_hash_traverse. */
static bfd_boolean
elf_gc_mark_dynamic_ref_symbol (struct elf_link_hash_entry *h,
void *okp ATTRIBUTE_UNUSED)
{
if (h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
if ((h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak)
&& (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC))
h->root.u.def.section->flags |= SEC_KEEP;
return TRUE;
}
/* Do mark and sweep of unused sections. */
bfd_boolean
@ -8426,8 +8444,8 @@ bfd_elf_gc_sections (bfd *abfd, struct bfd_link_info *info)
if (!get_elf_backend_data (abfd)->can_gc_sections
|| info->relocatable
|| info->emitrelocations
|| !is_elf_hash_table (info->hash)
|| elf_hash_table (info)->dynamic_sections_created)
|| info->shared
|| !is_elf_hash_table (info->hash))
{
(*_bfd_error_handler)(_("Warning: gc-sections option ignored"));
return TRUE;
@ -8447,8 +8465,15 @@ bfd_elf_gc_sections (bfd *abfd, struct bfd_link_info *info)
if (!ok)
return FALSE;
/* Grovel through relocs to find out who stays ... */
/* Mark dynamically referenced symbols. */
if (elf_hash_table (info)->dynamic_sections_created)
elf_link_hash_traverse (elf_hash_table (info),
elf_gc_mark_dynamic_ref_symbol,
&ok);
if (!ok)
return FALSE;
/* Grovel through relocs to find out who stays ... */
gc_mark_hook = get_elf_backend_data (abfd)->gc_mark_hook;
for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
{
@ -8460,8 +8485,15 @@ bfd_elf_gc_sections (bfd *abfd, struct bfd_link_info *info)
for (o = sub->sections; o != NULL; o = o->next)
{
if (o->flags & SEC_KEEP)
if (!elf_gc_mark (info, o, gc_mark_hook))
return FALSE;
{
/* _bfd_elf_discard_section_eh_frame knows how to discard
orphaned FDEs so don't mark sections referenced by the
EH frame section. */
if (strcmp (o->name, ".eh_frame") == 0)
o->gc_mark = 1;
else if (!elf_gc_mark (info, o, gc_mark_hook))
return FALSE;
}
}
}