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[Patch mach-o] support LOCAL_SECTDIFF relocs for i386 mach-o.


this is the BFD-side of a patch of Tristan's to support relocs between Local symbols in different sections.
... rebased to trunk.


OK?
Iain

bfd:

	* reloc.c (BFD_RELOC_MACH_O_LOCAL_SECTDIFF):
	* libbfd.h: Regenerated.
	* bfd-in2.h: Likewise.
	* mach-o-i386.c (i386_howto_table): Include local sectdiff.
	(bfd_mach_o_i386_swap_reloc_in): Update for local sectdiff.
	(bfd_mach_o_i386_swap_reloc_out): Likewise.

 bfd/bfd-in2.h |    3 +++
 bfd/libbfd.h  |    1 +
 bfd/mach-o-i386.c |   25 ++++++++++++++++++++++---
 bfd/reloc.c       |    4 ++++
 4 files changed, 30 insertions(+), 3 deletions(-)

diff --git a/bfd/mach-o-i386.c b/bfd/mach-o-i386.c
index 71272eb..e91e68a 100644
--- a/bfd/mach-o-i386.c
+++ b/bfd/mach-o-i386.c
@@ -63,6 +63,7 @@ bfd_mach_o_i386_mkobject (bfd *abfd)

static reloc_howto_type i386_howto_table[]=
{
+ /* 0 */
HOWTO(BFD_RELOC_32, 0, 2, 32, FALSE, 0,
complain_overflow_bitfield,
NULL, "32",
@@ -79,6 +80,7 @@ static reloc_howto_type i386_howto_table[]=
complain_overflow_bitfield,
NULL, "DISP32",
FALSE, 0xffffffff, 0xffffffff, TRUE),
+ /* 4 */
HOWTO(BFD_RELOC_16_PCREL, 0, 1, 16, TRUE, 0,
complain_overflow_bitfield,
NULL, "DISP16",
@@ -87,6 +89,10 @@ static reloc_howto_type i386_howto_table[]=
complain_overflow_bitfield,
NULL, "SECTDIFF_32",
FALSE, 0xffffffff, 0xffffffff, FALSE),
+ HOWTO(BFD_RELOC_MACH_O_LOCAL_SECTDIFF, 0, 2, 32, FALSE, 0,
+ complain_overflow_bitfield,
+ NULL, "LSECTDIFF_32",
+ FALSE, 0xffffffff, 0xffffffff, FALSE),
HOWTO(BFD_RELOC_MACH_O_PAIR, 0, 2, 32, FALSE, 0,
complain_overflow_bitfield,
NULL, "PAIR_32",
@@ -103,15 +109,19 @@ bfd_mach_o_i386_swap_reloc_in (arelent *res, bfd_mach_o_reloc_info *reloc)
case BFD_MACH_O_GENERIC_RELOC_PAIR:
if (reloc->r_length != 2)
return FALSE;
- res->howto = &i386_howto_table[6];
+ res->howto = &i386_howto_table[7];
res->address = res[-1].address;
return TRUE;
case BFD_MACH_O_GENERIC_RELOC_SECTDIFF:
- case BFD_MACH_O_GENERIC_RELOC_LOCAL_SECTDIFF:
if (reloc->r_length != 2)
return FALSE;
res->howto = &i386_howto_table[5];
return TRUE;
+ case BFD_MACH_O_GENERIC_RELOC_LOCAL_SECTDIFF:
+ if (reloc->r_length != 2)
+ return FALSE;
+ res->howto = &i386_howto_table[6];
+ return TRUE;
default:
return FALSE;
}
@@ -183,6 +193,15 @@ bfd_mach_o_i386_swap_reloc_out (arelent *rel, bfd_mach_o_reloc_info *rinfo)
rinfo->r_value = (*rel->sym_ptr_ptr)->value
+ (*rel->sym_ptr_ptr)->section->vma;
break;
+ case BFD_RELOC_MACH_O_LOCAL_SECTDIFF:
+ rinfo->r_scattered = 1;
+ rinfo->r_type = BFD_MACH_O_GENERIC_RELOC_LOCAL_SECTDIFF;
+ rinfo->r_pcrel = 0;
+ rinfo->r_length = 2;
+ rinfo->r_extern = 0;
+ rinfo->r_value = (*rel->sym_ptr_ptr)->value
+ + (*rel->sym_ptr_ptr)->section->vma;
+ break;
case BFD_RELOC_MACH_O_PAIR:
rinfo->r_address = 0;
rinfo->r_scattered = 1;
diff --git a/bfd/reloc.c b/bfd/reloc.c
index 5cde4a8..778276f 100644
--- a/bfd/reloc.c
+++ b/bfd/reloc.c
@@ -5594,6 +5594,10 @@ ENUMDOC
Difference between two section addreses. Must be followed by a
BFD_RELOC_MACH_O_PAIR.
ENUM
+ BFD_RELOC_MACH_O_LOCAL_SECTDIFF
+ENUMDOC
+ Like BFD_RELOC_MACH_O_SECTDIFF but with a local symbol.
+ENUM
BFD_RELOC_MACH_O_PAIR
ENUMDOC
Pair of relocation. Contains the first symbol.



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