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| author | Jakub Jelinek <jakub@redhat.com> | 2006-03-31 02:30:28 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-31 12:18:52 -0800 |
| commit | da2e9e1ff40c863a12803c32209baaded3512433 (patch) | |
| tree | 7770ed3904d312850e745cca175a7322b63785ab /arch/i386/kernel/vsyscall-sigreturn.S | |
| parent | 97db7fbfc7712bc403330c81c04ddfa82b335bce (diff) | |
| download | blackbird-op-linux-da2e9e1ff40c863a12803c32209baaded3512433.tar.gz blackbird-op-linux-da2e9e1ff40c863a12803c32209baaded3512433.zip | |
[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.S | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/i386/kernel/vsyscall-sigreturn.S b/arch/i386/kernel/vsyscall-sigreturn.S index fadb5bc3c374..a92262f41659 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 */ |
