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commit afe397ea85a3d09d936c93328a1f6bf640577cf3
Author: Alan Modra <amodra@gmail.com>
Date: Wed Nov 6 10:20:52 2013 +1030
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.
Index: gdb-7.6.1/bfd/elf64-ppc.c
===================================================================
--- gdb-7.6.1.orig/bfd/elf64-ppc.c
+++ gdb-7.6.1/bfd/elf64-ppc.c
@@ -8496,7 +8496,7 @@ ppc64_elf_edit_toc (struct bfd_link_info
|| discarded_section (sym_sec))
continue;
- if (!SYMBOL_CALLS_LOCAL (info, h))
+ if (!SYMBOL_REFERENCES_LOCAL (info, h))
continue;
if (h != NULL)
@@ -9344,7 +9344,13 @@ size_global_entry_stubs (struct elf_link
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;
}
@@ -12183,13 +12189,6 @@ build_global_entry_stubs (struct elf_lin
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->plt;
if (!htab->elf.dynamic_sections_created
@@ -12383,10 +12382,7 @@ ppc64_elf_build_stubs (bfd_boolean emit_
/* 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)
@@ -13624,7 +13620,7 @@ ppc64_elf_relocate_section (bfd *output_
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
@@ -14003,7 +13999,7 @@ ppc64_elf_relocate_section (bfd *output_
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)
{