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* elf32-ppc.c (is_pic_glink_stub): New function.

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(ppc_elf_get_synthetic_symtab): Don't generate symbols when
	multiple shared/pie stubs per plt entry.
This commit is contained in:
Alan Modra 2008-07-02 13:31:53 +00:00
parent b8be0b248f
commit 7382d32a75
2 changed files with 41 additions and 2 deletions
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6
bfd/ChangeLog
View File

@ -1,3 +1,9 @@
2008-07-02 Alan Modra <amodra@bigpond.net.au>
* elf32-ppc.c (is_pic_glink_stub): New function.
(ppc_elf_get_synthetic_symtab): Don't generate symbols when
multiple shared/pie stubs per plt entry.
2008-06-30 Richard Sandiford <rdsandiford@googlemail.com>
* elf.c (_bfd_elf_get_synthetic_symtab): Increment p by

37
bfd/elf32-ppc.c
View File

@ -2291,6 +2291,29 @@ ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
apuinfo_list_finish ();
}
static bfd_boolean
is_pic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
{
bfd_byte buf[16];
unsigned int insn;
if (!bfd_get_section_contents (abfd, glink, buf, off, 16))
return FALSE;
insn = bfd_get_32 (abfd, buf);
if ((insn & 0xffff0000) == LWZ_11_30
&& bfd_get_32 (abfd, buf + 4) == MTCTR_11
&& bfd_get_32 (abfd, buf + 8) == BCTR)
return TRUE;
if ((insn & 0xffff0000) == ADDIS_11_30
&& (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
&& bfd_get_32 (abfd, buf + 8) == MTCTR_11
&& bfd_get_32 (abfd, buf + 12) == BCTR)
return TRUE;
return FALSE;
}
static bfd_boolean
section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
{
@ -2419,12 +2442,22 @@ ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
}
}
count = relplt->size / sizeof (Elf32_External_Rela);
stub_vma = glink_vma - (bfd_vma) count * 16;
/* If the stubs are those for -shared/-pie then we might have
multiple stubs for each plt entry. If that is the case then
there is no way to associate stubs with their plt entries short
of figuring out the GOT pointer value used in the stub. */
if (!bfd_get_section_contents (abfd, glink, buf,
stub_vma - glink->vma, 4)
|| ((bfd_get_32 (abfd, buf) & 0xffff0000) != LIS_11
&& is_pic_glink_stub (abfd, glink, stub_vma - glink->vma - 16)))
return 0;
slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
return -1;
count = relplt->size / sizeof (Elf32_External_Rela);
stub_vma = glink_vma - (bfd_vma) count * 16;
size = count * sizeof (asymbol);
p = relplt->relocation;
for (i = 0; i < count; i++, p++)