[committed/darwin]: Fix relocation addend for non-external relocs

[Tristan Gingold <gingold at adacore dot com>]

Hi,

a particularity of Mach-O is that even in object files sections do not overlap (only the first one is at
vma 0).  And even relocations to non-external symbols have as an addend the offset of the section.
As this doesn't match bfd conventions, we need to adjust the addend.

Tested with gdb.

Tristan.

bfd/
2010-02-09  Tristan Gingold  <gingold@adacore.com>

	* mach-o.c (bfd_mach_o_canonicalize_one_reloc): Adjust addend for
	non-external relocation.

RCS file: /cvs/src/src/bfd/mach-o.c,v
retrieving revision 1.53
diff -c -r1.53 mach-o.c
*** mach-o.c	8 Feb 2010 09:13:47 -0000	1.53
--- mach-o.c	9 Feb 2010 13:34:12 -0000
***************
*** 714,719 ****
--- 714,725 ----
+           /* For a symbol defined in section S, the addend (stored in the
+              binary) contains the address of the section.  To comply with
+              bfd conventio, substract the section address.
+              Use the address from the header, so that the user can modify
+              the vma of the section.  */
+           res->addend = -mdata->sections[num - 1]->addr;
            reloc.r_extern = 0;
          }
        res->sym_ptr_ptr = sym;