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[PATCH] i386/x86-64: fall back to old-style call trace if no unwinding

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If no unwinding is possible at all for a certain exception instance,
fall back to the old style call trace instead of not showing any trace
at all.

Also, allow setting the stack trace mode at the command line.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Jan Beulich 2006-06-26 13:57:47 +02:00 • committed by Linus Torvalds
parent fe7cacc1c2
commit c33bd9aac0
6 changed files with 83 additions and 45 deletions
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8
include/linux/unwind.h
View file

@ -49,8 +49,8 @@ extern int unwind_init_blocked(struct unwind_frame_info *,
* Prepare to unwind the currently running thread.
*/
extern int unwind_init_running(struct unwind_frame_info *,
asmlinkage void (*callback)(struct unwind_frame_info *,
void *arg),
asmlinkage int (*callback)(struct unwind_frame_info *,
void *arg),
void *arg);
/*
@ -97,8 +97,8 @@ static inline int unwind_init_blocked(struct unwind_frame_info *info,
}
static inline int unwind_init_running(struct unwind_frame_info *info,
asmlinkage void (*cb)(struct unwind_frame_info *,
void *arg),
asmlinkage int (*cb)(struct unwind_frame_info *,
void *arg),
void *arg)
{
return -ENOSYS;