Avoid 64-bit Solaris/SPARC -gstabs link failures (PR ld/12152)

[Rainer Orth]

As described in the PR, many 64-bit -gstabs* tests in the GCC testsuite
FAIL on Solaris/SPARC like this:

FAIL: gcc.dg/debug/20020220-1.c -gstabs1 (test for excess errors)
Excess errors:
/vol/gcc/src/hg/trunk/local/gcc/testsuite/gcc.dg/debug/20020220-1.c:19:(.stab+0x14): relocation truncated to fit: R_SPARC_UA32 against `.text'

and many more.

It seems this is a known issue and R_SPARC_32 relocs are already handled
in bfd/elfxx-sparc.c (_bfd_sparc_elf_relocate_section).  The following
patch handles R_SPARC_UA32 in the same way and makes all those failures
go away.

Ok for mainline (and eventually the 2.22 branch)?

	Rainer


2012-03-01  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>

	bfd:
	PR ld/12152
	* elfxx-sparc.c (_bfd_sparc_elf_relocate_section): Also ignore
	overflows for R_SPARC_UA32 in .stab sections.

===================================================================
RCS file: RCS/elfxx-sparc.c,v
retrieving revision 1.1
diff -up -r1.1 elfxx-sparc.c
--- elfxx-sparc.c	2011/11/21 09:29:28	1.1
+++ elfxx-sparc.c	2012/02/28 17:43:57
@@ -4067,7 +4067,9 @@ do_relocation:
 		   We don't, but this breaks stabs debugging info, whose
 		   relocations are only 32-bits wide.  Ignore overflows in
 		   this case and also for discarded entries.  */
-		if ((r_type == R_SPARC_32 || r_type == R_SPARC_DISP32)
+		if ((r_type == R_SPARC_32
+		     || r_type == R_SPARC_UA32
+		     || r_type == R_SPARC_DISP32)
 		    && (((input_section->flags & SEC_DEBUGGING) != 0
 			 && strcmp (bfd_section_name (input_bfd,
 						      input_section),


-- 
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Rainer Orth, Center for Biotechnology, Bielefeld University