Committed, fix ld/1567, 64-bit vma overflow signalled from 32-bit-target address-wrap.

[Hans-Peter Nilsson <hans-peter dot nilsson at axis dot com>]

See the elf32-cris.c comment and the test-case, distilled from
the Linux error case.  I'm a bit undecided whether ld/bfd itself
should truncate for 32-bit addresses here.  Maybe the offset
should have been sign-extended instead of zero-extended.
Anyway, it's easy enough to just make the reloc type decide what
can be an overflow.

bfd:
	PR ld/1567
	* elf32-cris.c (cris_elf_howto_table) <R_CRIS_32>: Set
	complain_on_overflow field to complain_overflow_dont.

ld/testsuite:
	PR ld/1567
	* ld-cris/noov.s, ld-cris/noov.d: New test.

Index: elf32-cris.c
===================================================================
RCS file: /cvs/src/src/bfd/elf32-cris.c,v
retrieving revision 1.70
diff -p -u -r1.70 elf32-cris.c
--- elf32-cris.c	18 Aug 2005 01:28:22 -0000	1.70
+++ elf32-cris.c	28 Oct 2005 00:15:55 -0000
@@ -156,7 +156,12 @@ static reloc_howto_type cris_elf_howto_t
 	 32,			/* bitsize */
 	 FALSE,			/* pc_relative */
 	 0,			/* bitpos */
-	 complain_overflow_bitfield, /* complain_on_overflow */
+	 /* We don't want overflow complaints for 64-bit vma builds
+	    for e.g. sym+0x40000000 (or actually sym-0xc0000000 in
+	    32-bit ELF) where sym=0xc0001234.
+	    Don't do this for the PIC relocs, as we don't expect to
+	    see them with large offsets.  */
+	 complain_overflow_dont, /* complain_on_overflow */
 	 bfd_elf_generic_reloc,	/* special_function */
 	 "R_CRIS_32",		/* name */
 	 FALSE,			/* partial_inplace */
--- /dev/null	2005-10-24 09:14:21.072379500 +0200
+++ noov.d	2005-10-28 02:14:31.000000000 +0200
@@ -0,0 +1,13 @@
+#notarget: cris-*-*aout*
+#ld: --section-start=.text=0xc0010000
+#objdump: -s -j .text
+
+# Check that we don't get a "relocation truncated to fit", when a
+# relocation would overflow if it hadn't been wrapping.  We always
+# want 32-bit-wrapping on a 32-bit target for the benefit of Linux
+# address-mapping macros.
+
+.*:     file format elf32.*-cris
+
+Contents of section \.text:
+ c0010000 04200100 00200100                    .*
--- /dev/null	2005-10-24 09:14:21.072379500 +0200
+++ noov.s	2005-10-28 02:14:23.000000000 +0200
@@ -0,0 +1,14 @@
+ .text
+ ; Test that this works both with a symbol defined in a section...
+ .dword __Edata+0x40000000
+
+ ; ...as well as absolute symbol (defined outside sections in the
+ ; linker script).
+ .dword __Sdata+0x40000000
+
+ .data
+ ; Make sure we get the same section alignment for *-elf as for *-linux*.
+ .balign 0x2000
+
+ ; Make .data non-empty.
+ .dword 0

brgds, H-P