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S/390: ifunc: Fix function pointers to hidden ifunc symbols.

Browse Source 
bfd/ChangeLog:
	* elf32-s390.c (elf_s390_adjust_dynamic_symbol): Set the PLT
	reference counters for local IFUNC calls.
	* elf64-s390.c (elf_s390_adjust_dynamic_symbol): Likewise.
This commit is contained in:
Andreas Krebbel
2015-10-16 21:49:43 +02:00
parent 01a5358479
commit d8ee9e44cc
3 changed files with 88 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
bfd/ChangeLog
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@ -1,3 +1,9 @@
2015-10-22 Andreas Krebbel <krebbel@linux.vnet.ibm.com>
* elf32-s390.c (elf_s390_adjust_dynamic_symbol): Set the PLT
reference counters for local IFUNC calls.
* elf64-s390.c (elf_s390_adjust_dynamic_symbol): Likewise.
2015-10-22 Andreas Krebbel <krebbel@linux.vnet.ibm.com>
* elf32-s390.c (elf_s390_check_relocs): Fallthrough to the PLT

40
bfd/elf32-s390.c
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@ -1658,7 +1658,47 @@ elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
/* STT_GNU_IFUNC symbol must go through PLT. */
if (s390_is_ifunc_symbol_p (h))
{
/* All local STT_GNU_IFUNC references must be treated as local
calls via local PLT. */
if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h))
{
bfd_size_type pc_count = 0, count = 0;
struct elf_dyn_relocs **pp;
struct elf_s390_link_hash_entry *eh;
struct elf_dyn_relocs *p;
eh = (struct elf_s390_link_hash_entry *) h;
for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
{
pc_count += p->pc_count;
p->count -= p->pc_count;
p->pc_count = 0;
count += p->count;
if (p->count == 0)
*pp = p->next;
else
pp = &p->next;
}
if (pc_count || count)
{
h->needs_plt = 1;
h->non_got_ref = 1;
if (h->plt.refcount <= 0)
h->plt.refcount = 1;
else
h->plt.refcount += 1;
}
}
if (h->plt.refcount <= 0)
{
h->plt.offset = (bfd_vma) -1;
h->needs_plt = 0;
}
return TRUE;
}
/* If this is a function, put it in the procedure linkage table. We
will fill in the contents of the procedure linkage table later

40
bfd/elf64-s390.c
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@ -1592,7 +1592,47 @@ elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
/* STT_GNU_IFUNC symbol must go through PLT. */
if (s390_is_ifunc_symbol_p (h))
{
/* All local STT_GNU_IFUNC references must be treated as local
calls via local PLT. */
if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h))
{
bfd_size_type pc_count = 0, count = 0;
struct elf_dyn_relocs **pp;
struct elf_s390_link_hash_entry *eh;
struct elf_dyn_relocs *p;
eh = (struct elf_s390_link_hash_entry *) h;
for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
{
pc_count += p->pc_count;
p->count -= p->pc_count;
p->pc_count = 0;
count += p->count;
if (p->count == 0)
*pp = p->next;
else
pp = &p->next;
}
if (pc_count || count)
{
h->needs_plt = 1;
h->non_got_ref = 1;
if (h->plt.refcount <= 0)
h->plt.refcount = 1;
else
h->plt.refcount += 1;
}
}
if (h->plt.refcount <= 0)
{
h->plt.offset = (bfd_vma) -1;
h->needs_plt = 0;
}
return TRUE;
}
/* If this is a function, put it in the procedure linkage table. We
will fill in the contents of the procedure linkage table later