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Correct elf64-ppc.c handling of protected symbols 

Some places in elf64-ppc.c carelessly used SYMBOL_CALLS_LOCAL when
the proper test is SYMBOL_REFERENCES_LOCAL for cases where we take the
address of a protected symbol.  This works OK for function descriptors
but not for ELFv2.  Setting symbols to their global entry stub a
little earlier is to ensure _bfd_elf_hash_symbol allows such symbols
in .gnu.hash.

	* elf64-ppc.c (ppc64_elf_edit_toc): Use SYMBOL_REFERENCES_LOCAL
	here, not SYMBOL_CALLS_LOCAL.
	(ppc64_elf_relocate_section): Likewise.
	(size_global_entry_stubs): Set undefined symbols on their global
	entry stubs here..
	(build_global_entry_stubs): ..rather than here.
	(ppc64_elf_build_stubs): Don't reset glink->size before calling
	build_global_entry_stubs.
This commit is contained in:
Alan Modra 2013-11-06 10:20:52 +10:30
parent 32798b4b81
commit afe397ea85
2 changed files with 21 additions and 14 deletions
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11
bfd/ChangeLog
View File

@ -1,3 +1,14 @@
2013-11-11 Ulrich Weigand <uweigand@de.ibm.com>
* elf64-ppc.c (ppc64_elf_edit_toc): Use SYMBOL_REFERENCES_LOCAL
here, not SYMBOL_CALLS_LOCAL.
(ppc64_elf_relocate_section): Likewise.
(size_global_entry_stubs): Set undefined symbols on their global
entry stubs here..
(build_global_entry_stubs): ..rather than here.
(ppc64_elf_build_stubs): Don't reset glink->size before calling
build_global_entry_stubs.
2013-11-07 Roland McGrath <mcgrathr@google.com>
* archures.c (bfd_mach_i386_nacl): Fix definition so it doesn't

24
bfd/elf64-ppc.c
View File

@ -8698,7 +8698,7 @@ ppc64_elf_edit_toc (struct bfd_link_info *info)
|| discarded_section (sym_sec))
continue;
if (!SYMBOL_CALLS_LOCAL (info, h))
if (!SYMBOL_REFERENCES_LOCAL (info, h))
continue;
if (h != NULL)
@ -9545,7 +9545,13 @@ size_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
if (pent->plt.offset != (bfd_vma) -1
&& pent->addend == 0)
{
/* For ELFv2, if this symbol is not defined in a regular file
and we are not generating a shared library or pie, then we
need to define the symbol in the executable on a call stub.
This is to avoid text relocations. */
s->size = (s->size + 15) & -16;
h->root.u.def.section = s;
h->root.u.def.value = s->size;
s->size += 16;
break;
}
@ -12381,13 +12387,6 @@ build_global_entry_stubs (struct elf_link_hash_entry *h, void *inf)
asection *plt;
bfd_vma off;
/* For ELFv2, if this symbol is not defined in a regular file
and we are not generating a shared library or pie, then we
need to define the symbol in the executable on a call stub.
This is to avoid text relocations. */
h->root.u.def.section = s;
h->root.u.def.value = s->size;
s->size += 16;
p = s->contents + h->root.u.def.value;
plt = htab->elf.splt;
if (!htab->elf.dynamic_sections_created
@ -12583,10 +12582,7 @@ ppc64_elf_build_stubs (bfd_boolean emit_stub_syms,
/* Build .glink global entry stubs. */
if (htab->glink->size > htab->glink->rawsize)
{
htab->glink->size = (htab->glink->rawsize + 15) & -16;
elf_link_hash_traverse (&htab->elf, build_global_entry_stubs, info);
}
elf_link_hash_traverse (&htab->elf, build_global_entry_stubs, info);
}
if (htab->brlt->size != 0)
@ -13856,7 +13852,7 @@ ppc64_elf_relocate_section (bfd *output_bfd,
if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared,
&h->elf)
|| (info->shared
&& SYMBOL_CALLS_LOCAL (info, &h->elf)))
&& SYMBOL_REFERENCES_LOCAL (info, &h->elf)))
/* This is actually a static link, or it is a
-Bsymbolic link and the symbol is defined
locally, or the symbol was forced to be local
@ -14241,7 +14237,7 @@ ppc64_elf_relocate_section (bfd *output_bfd,
if (skip)
memset (&outrel, 0, sizeof outrel);
else if (!SYMBOL_CALLS_LOCAL (info, &h->elf)
else if (!SYMBOL_REFERENCES_LOCAL (info, &h->elf)
&& !is_opd
&& r_type != R_PPC64_TOC)
{