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authorJan Beulich <jbeulich@novell.com>2006-08-30 19:37:11 +0200
committerLinus Torvalds <torvalds@g5.osdl.org>2006-08-30 16:05:15 -0700
commitea424055b771a165c9abd3ae109255a3b825c745 (patch)
tree228f3bf4f392a8ce45d78a1ea8cfd8bd6f1f4f5b /include/asm-x86_64
parent61171b8dbd36b0cc34d3813a59a8e4dc2984414d (diff)
downloadblackbird-op-linux-ea424055b771a165c9abd3ae109255a3b825c745.tar.gz
blackbird-op-linux-ea424055b771a165c9abd3ae109255a3b825c745.zip
[PATCH] x86: Make backtracer fallback logic more bullet-proof
The unwinder fallback logic still had potential for falling through to the legacy stack trace code without printing an indication (at once serving as a separator) of this. Further, the stack pointer retrieval for the fallback should be as restrictive as possible (in order to avoid having the legacy stack tracer try to access invalid memory). The patch tightens that, but this could certainly be further improved. Also making the call_trace command line option now conditional upon CONFIG_STACK_UNWIND (as it's meaningless otherwise). Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-x86_64')
-rw-r--r--include/asm-x86_64/unwind.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/asm-x86_64/unwind.h b/include/asm-x86_64/unwind.h
index f3e7124effe3..1f6e9bfb569e 100644
--- a/include/asm-x86_64/unwind.h
+++ b/include/asm-x86_64/unwind.h
@@ -95,6 +95,7 @@ static inline int arch_unw_user_mode(const struct unwind_frame_info *info)
#else
#define UNW_PC(frame) ((void)(frame), 0)
+#define UNW_SP(frame) ((void)(frame), 0)
static inline int arch_unw_user_mode(const void *info)
{
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