summaryrefslogtreecommitdiffstats
path: root/arch/i386/kernel/vsyscall-sigreturn.S
diff options
context:
space:
mode:
authorJakub Jelinek <jakub@redhat.com>2006-03-31 02:30:28 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-31 12:18:52 -0800
commitda2e9e1ff40c863a12803c32209baaded3512433 (patch)
tree7770ed3904d312850e745cca175a7322b63785ab /arch/i386/kernel/vsyscall-sigreturn.S
parent97db7fbfc7712bc403330c81c04ddfa82b335bce (diff)
downloadop-kernel-dev-da2e9e1ff40c863a12803c32209baaded3512433.zip
op-kernel-dev-da2e9e1ff40c863a12803c32209baaded3512433.tar.gz
[PATCH] Mark unwind info for signal trampolines in vDSOs
Mark unwind info for signal trampolines using the new S augmentation flag introduced in: http://gcc.gnu.org/PR26208. GCC 4.2 (or patched earlier GCC) will be able to special case unwinding through frames right above signal trampolines. As the augmentations start with z flag and S is at the very end of the augmentation string, older GCCs will just skip the S flag as unknown (that's why an augmentation flag was chosen over say a new CFA opcode). Signed-off-by: Jakub Jelinek <jakub@redhat.com> Cc: Andi Kleen <ak@muc.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/i386/kernel/vsyscall-sigreturn.S')
-rw-r--r--arch/i386/kernel/vsyscall-sigreturn.S2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/i386/kernel/vsyscall-sigreturn.S b/arch/i386/kernel/vsyscall-sigreturn.S
index fadb5bc..a92262f 100644
--- a/arch/i386/kernel/vsyscall-sigreturn.S
+++ b/arch/i386/kernel/vsyscall-sigreturn.S
@@ -44,7 +44,7 @@ __kernel_rt_sigreturn:
.LSTARTCIEDLSI1:
.long 0 /* CIE ID */
.byte 1 /* Version number */
- .string "zR" /* NUL-terminated augmentation string */
+ .string "zRS" /* NUL-terminated augmentation string */
.uleb128 1 /* Code alignment factor */
.sleb128 -4 /* Data alignment factor */
.byte 8 /* Return address register column */
OpenPOWER on IntegriCloud