S/390: Fix ifunc missing runtime reloc

This fixes a problem with a missing R_390_64 reloc against .data for a
function pointer to an ifunc function.

No regressions on s390x.

Pushed to mainline.

bfd/ChangeLog:

2017-05-08  Andreas Krebbel  <krebbel@linux.vnet.ibm.com>

	* elf-s390-common.c: Don't check non_got_ref flag.
	* elf32-s390.c (elf_s390_relocate_section): Likewise.
	* elf64-s390.c (elf_s390_relocate_section): Likewise.

diff --git a/bfd/elf-s390-common.c b/bfd/elf-s390-common.c
index 1570365..8795fb9 100644 (file)
--- a/bfd/elf-s390-common.c
+++ b/bfd/elf-s390-common.c
@@ -161,9 +161,7 @@ keep:
       h->type = STT_FUNC;
     }
 
-  /* We need dynamic relocation for STT_GNU_IFUNC symbol only when
-     there is a non-GOT reference in a shared object.  */
-  if (!bfd_link_pic (info) || !h->non_got_ref)
+  if (!bfd_link_pic (info))
     *head = NULL;
 
   /* Finally, allocate space.  */

diff --git a/bfd/elf32-s390.c b/bfd/elf32-s390.c
index ddb6f5b..8a09a31 100644 (file)
--- a/bfd/elf32-s390.c
+++ b/bfd/elf32-s390.c
@@ -2774,7 +2774,7 @@ elf_s390_relocate_section (bfd *output_bfd,
              && s390_is_ifunc_symbol_p (h)
              && h->def_regular)
            {
-             if (!bfd_link_pic (info) || !h->non_got_ref)
+             if (!bfd_link_pic (info))
                {
                  /* For a non-shared object STT_GNU_IFUNC symbol must
                     go through PLT.  */

diff --git a/bfd/elf64-s390.c b/bfd/elf64-s390.c
index fbbf8d6..ca3541f 100644 (file)
--- a/bfd/elf64-s390.c
+++ b/bfd/elf64-s390.c
@@ -2737,10 +2737,11 @@ elf_s390_relocate_section (bfd *output_bfd,
              && s390_is_ifunc_symbol_p (h)
              && h->def_regular)
            {
-             if (!bfd_link_pic (info) || !h->non_got_ref)
+             if (!bfd_link_pic (info))
                {
-                 /* For a non-shared object STT_GNU_IFUNC symbol must
-                    go through PLT.  */
+                 /* For a non-shared object the symbol will not
+                    change.  Hence we can write the address of the
+                    target IPLT slot now.  */
                  relocation = (htab->elf.iplt->output_section->vma
                                + htab->elf.iplt->output_offset
                                + h ->plt.offset);