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bfd: fix the deletion of relocs in sparc64 

This patch fixes the deletion of relocations in BFD sections in
sparc64 targets.

A specialized `_bfd_set_reloc' function is provided that updates the
internal canon_reloc_count(sec) counter instead of sec->reloc_count.
Additionally, the `write_relocs' callback in elf64-sparc is adapted to
use the canon_reloc_count to traverse `sec->orelocation'.

Tested in sparc64-linux-gnu targets.
Fixes an existing failure in the merge-notes objcopy test.
No regressions.

bfd/ChangeLog:

2017-05-10  Jose E. Marchesi  <jose.marchesi@oracle.com>

	* elf64-sparc.c (elf64_sparc_set_reloc): New function.
	(bfd_elf64_set_reloc): Define.
	(elf64_sparc_write_relocs): Use `canon_reloc_count'.
This commit is contained in:
Jose E. Marchesi 2017-05-10 18:44:19 +02:00
parent 2318686590
commit db84b98a16
2 changed files with 25 additions and 5 deletions
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6
bfd/ChangeLog
View File

@ -1,3 +1,9 @@
2017-05-10 Jose E. Marchesi <jose.marchesi@oracle.com>
* elf64-sparc.c (elf64_sparc_set_reloc): New function.
(bfd_elf64_set_reloc): Define.
(elf64_sparc_write_relocs): Use `canon_reloc_count'.
2017-05-10 Jose E. Marchesi <jose.marchesi@oracle.com>
* targets.c (BFD_JUMP_TABLE_RELOCS): Add NAME##_set_reloc.

24
bfd/elf64-sparc.c
View File

@ -278,6 +278,18 @@ elf64_sparc_canonicalize_dynamic_reloc (bfd *abfd, arelent **storage,
return ret;
}
/* Install a new set of internal relocs. */
static void
elf64_sparc_set_reloc (bfd *abfd ATTRIBUTE_UNUSED,
asection *asect,
arelent **location,
unsigned int count)
{
asect->orelocation = location;
canon_reloc_count (asect) = count;
}
/* Write out the relocs. */
static void
@ -302,14 +314,14 @@ elf64_sparc_write_relocs (bfd *abfd, asection *sec, void * data)
reloc_count field to zero to inhibit writing them here. Also,
sometimes the SEC_RELOC flag gets set even when there aren't any
relocs. */
if (sec->reloc_count == 0)
if (canon_reloc_count (sec) == 0)
return;
/* We can combine two relocs that refer to the same address
into R_SPARC_OLO10 if first one is R_SPARC_LO10 and the
latter is R_SPARC_13 with no associated symbol. */
count = 0;
for (idx = 0; idx < sec->reloc_count; idx++)
for (idx = 0; idx < canon_reloc_count (sec); idx++)
{
bfd_vma addr;
@ -317,7 +329,7 @@ elf64_sparc_write_relocs (bfd *abfd, asection *sec, void * data)
addr = sec->orelocation[idx]->address;
if (sec->orelocation[idx]->howto->type == R_SPARC_LO10
&& idx < sec->reloc_count - 1)
&& idx < canon_reloc_count (sec) - 1)
{
arelent *r = sec->orelocation[idx + 1];
@ -354,7 +366,7 @@ elf64_sparc_write_relocs (bfd *abfd, asection *sec, void * data)
outbound_relocas = (Elf64_External_Rela *) rela_hdr->contents;
src_rela = outbound_relocas;
for (idx = 0; idx < sec->reloc_count; idx++)
for (idx = 0; idx < canon_reloc_count (sec); idx++)
{
Elf_Internal_Rela dst_rela;
arelent *ptr;
@ -388,7 +400,7 @@ elf64_sparc_write_relocs (bfd *abfd, asection *sec, void * data)
}
if (ptr->howto->type == R_SPARC_LO10
&& idx < sec->reloc_count - 1)
&& idx < canon_reloc_count (sec) - 1)
{
arelent *r = sec->orelocation[idx + 1];
@ -854,6 +866,8 @@ const struct elf_size_info elf64_sparc_size_info =
elf64_sparc_canonicalize_reloc
#define bfd_elf64_canonicalize_dynamic_reloc \
elf64_sparc_canonicalize_dynamic_reloc
#define bfd_elf64_set_reloc \
elf64_sparc_set_reloc
#define elf_backend_add_symbol_hook \
elf64_sparc_add_symbol_hook
#define elf_backend_get_symbol_type \