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Discard space for relocs against symbols with copy relocs

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This patch reverts the change in elf_x86_64_check_relocs and the partial
change in elf_x86_64_adjust_dynamic_symbol.  Instead, we discard space
in PIE for relocs against symbols which turn out to need copy relocs.

	* elf64-x86-64.c (elf_x86_64_check_relocs): Revert the last
	change.
	(elf_x86_64_adjust_dynamic_symbol): Don't check !info->shared
	with ELIMINATE_COPY_RELOCS.
	(elf_x86_64_allocate_dynrelocs): For PIE, discard space for
	relocs against symbols which turn out to need copy relocs.
This commit is contained in:
H.J. Lu 2014-12-02 16:50:14 -08:00
parent 29f0c3b7b2
commit 31c0ebfe8b
2 changed files with 30 additions and 15 deletions
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9
bfd/ChangeLog
View File

@ -1,3 +1,12 @@
2014-12-02 H.J. Lu <hongjiu.lu@intel.com>
* elf64-x86-64.c (elf_x86_64_check_relocs): Revert the last
change.
(elf_x86_64_adjust_dynamic_symbol): Don't check !info->shared
with ELIMINATE_COPY_RELOCS.
(elf_x86_64_allocate_dynrelocs): For PIE, discard space for
relocs against symbols which turn out to need copy relocs.
2014-12-02 H.J. Lu <hongjiu.lu@intel.com>
* elf64-x86-64.c (elf_x86_64_create_dynamic_sections): Always

36
bfd/elf64-x86-64.c
View File

@ -1955,8 +1955,7 @@ do_size:
storing information in the relocs_copied field of the hash
table entry. A similar situation occurs when creating
shared libraries and symbol visibility changes render the
symbol local. We allow copy relocs for non-GOT pc-relative
relocation.
symbol local.
If on the other hand, we are creating an executable, we
may need to keep relocations for symbols satisfied by a
@ -1966,7 +1965,6 @@ do_size:
&& (sec->flags & SEC_ALLOC) != 0
&& (! IS_X86_64_PCREL_TYPE (r_type)
|| (h != NULL
&& !h->non_got_ref
&& (! SYMBOLIC_BIND (info, h)
|| h->root.type == bfd_link_hash_defweak
|| !h->def_regular))))
@ -2402,7 +2400,7 @@ elf_x86_64_adjust_dynamic_symbol (struct bfd_link_info *info,
return TRUE;
}
if (ELIMINATE_COPY_RELOCS && !info->shared)
if (ELIMINATE_COPY_RELOCS)
{
eh = (struct elf_x86_64_link_hash_entry *) h;
for (p = eh->dyn_relocs; p != NULL; p = p->next)
@ -2719,20 +2717,28 @@ elf_x86_64_allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
/* Also discard relocs on undefined weak syms with non-default
visibility. */
if (eh->dyn_relocs != NULL
&& h->root.type == bfd_link_hash_undefweak)
if (eh->dyn_relocs != NULL)
{
if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
if (h->root.type == bfd_link_hash_undefweak)
{
if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
eh->dyn_relocs = NULL;
/* Make sure undefined weak symbols are output as a dynamic
symbol in PIEs. */
else if (h->dynindx == -1
&& ! h->forced_local
&& ! bfd_elf_link_record_dynamic_symbol (info, h))
return FALSE;
}
/* For PIE, discard space for relocs against symbols which
turn out to need copy relocs. */
else if (info->executable
&& h->needs_copy
&& h->def_dynamic
&& !h->def_regular)
eh->dyn_relocs = NULL;
/* Make sure undefined weak symbols are output as a dynamic
symbol in PIEs. */
else if (h->dynindx == -1
&& ! h->forced_local
&& ! bfd_elf_link_record_dynamic_symbol (info, h))
return FALSE;
}
}
else if (ELIMINATE_COPY_RELOCS)
{