aboutsummaryrefslogtreecommitdiff
path: root/arch/powerpc/Makefile
diff options
context:
space:
mode:
authorAndi Kleen <andi@firstfloor.org>2010-02-02 14:40:02 -0800
committerMichal Marek <mmarek@suse.cz>2010-02-05 23:21:18 +0100
commitd0679c730395d0bde9a46939e7ba255b4ba7dd7c (patch)
treed6b6514d90826a2a52c463a944a301e267aeb30f /arch/powerpc/Makefile
parent59dde3853e07aaadc2b63abd16c954d5b0606cf1 (diff)
downloadlinaro-lsk-d0679c730395d0bde9a46939e7ba255b4ba7dd7c.tar.gz
kbuild: move -fno-dwarf2-cfi-asm to powerpc only
Better dwarf2 unwind information is a good thing, it allows better debugging with kgdb and crash and helps systemtap. Commit 003086497f07f7f1e67c0c295e261740f822b377 ("Build with -fno-dwarf2-cfi-asm") disabled some CFI information globally to work around a module loader bug on powerpc. But this disables the better unwind tables for all architectures, not just powerpc. Move the workaround to powerpc and also add a suitable comment that's it really a workaround. This improves dwarf2 unwind tables on x86 at least. Signed-off-by: Andi Kleen <ak@linux.intel.com> Cc: Kyle McMartin <kyle@mcmartin.ca> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Michal Marek <mmarek@suse.cz>
Diffstat (limited to 'arch/powerpc/Makefile')
-rw-r--r--arch/powerpc/Makefile5
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
index 1a54a3b3a3f..42dcd3f4ad7 100644
--- a/arch/powerpc/Makefile
+++ b/arch/powerpc/Makefile
@@ -112,6 +112,11 @@ KBUILD_CFLAGS += $(call cc-option,-mspe=no)
# kernel considerably.
KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
+# FIXME: the module load should be taught about the additional relocs
+# generated by this.
+# revert to pre-gcc-4.4 behaviour of .eh_frame
+KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
+
# Never use string load/store instructions as they are
# often slow when they are implemented at all
KBUILD_CFLAGS += -mno-string