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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/powerpc | |
| parent | 97db7fbfc7712bc403330c81c04ddfa82b335bce (diff) | |
| download | linux-da2e9e1ff40c863a12803c32209baaded3512433.tar.gz linux-da2e9e1ff40c863a12803c32209baaded3512433.tar.bz2 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/powerpc')
| -rw-r--r-- | arch/powerpc/kernel/vdso32/sigtramp.S | 2 | ||||
| -rw-r--r-- | arch/powerpc/kernel/vdso64/sigtramp.S | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/arch/powerpc/kernel/vdso32/sigtramp.S b/arch/powerpc/kernel/vdso32/sigtramp.S index e04642781917..0c6a37b29dde 100644 --- a/arch/powerpc/kernel/vdso32/sigtramp.S +++ b/arch/powerpc/kernel/vdso32/sigtramp.S @@ -261,7 +261,7 @@ V_FUNCTION_END(__kernel_sigtramp_rt32) .Lcie_start: .long 0 /* CIE ID */ .byte 1 /* Version number */ - .string "zR" /* NUL-terminated augmentation string */ + .string "zRS" /* NUL-terminated augmentation string */ .uleb128 4 /* Code alignment factor */ .sleb128 -4 /* Data alignment factor */ .byte 67 /* Return address register column, ap */ diff --git a/arch/powerpc/kernel/vdso64/sigtramp.S b/arch/powerpc/kernel/vdso64/sigtramp.S index 31b604ab56de..7479edb101b8 100644 --- a/arch/powerpc/kernel/vdso64/sigtramp.S +++ b/arch/powerpc/kernel/vdso64/sigtramp.S @@ -263,7 +263,7 @@ V_FUNCTION_END(__kernel_sigtramp_rt64) .Lcie_start: .long 0 /* CIE ID */ .byte 1 /* Version number */ - .string "zR" /* NUL-terminated augmentation string */ + .string "zRS" /* NUL-terminated augmentation string */ .uleb128 4 /* Code alignment factor */ .sleb128 -8 /* Data alignment factor */ .byte 67 /* Return address register column, ap */ |