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authorAlexander Nyberg <alexn@telia.com>2005-06-25 17:58:26 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-06-25 19:24:54 -0400
commit6e274d144302068a00794ec22e73520c0615cb6f (patch)
treef7ea59ea47d3c5676fbac8d39e8deaa1f94146ae /drivers
parent86b1ae38c0a62409dc862a28e3f08920f55f944b (diff)
[PATCH] kdump: Use real pt_regs from exception
Makes kexec_crashdump() take a pt_regs * as an argument. This allows to get exact register state at the point of the crash. If we come from direct panic assertion NULL will be passed and the current registers saved before crashdump. This hooks into two places: die(): check the conditions under which we will panic when calling do_exit and go there directly with the pt_regs that caused the fatal fault. die_nmi(): If we receive an NMI lockup while in the kernel use the pt_regs and go directly to crash_kexec(). We're probably nested up badly at this point so this might be the only chance to escape with proper information. Signed-off-by: Alexander Nyberg <alexn@telia.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/char/sysrq.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/char/sysrq.c b/drivers/char/sysrq.c
index 53b2c8fab00e..af79805b5576 100644
--- a/drivers/char/sysrq.c
+++ b/drivers/char/sysrq.c
@@ -100,7 +100,7 @@ static struct sysrq_key_op sysrq_unraw_op = {
100static void sysrq_handle_crashdump(int key, struct pt_regs *pt_regs, 100static void sysrq_handle_crashdump(int key, struct pt_regs *pt_regs,
101 struct tty_struct *tty) 101 struct tty_struct *tty)
102{ 102{
103 crash_kexec(); 103 crash_kexec(pt_regs);
104} 104}
105static struct sysrq_key_op sysrq_crashdump_op = { 105static struct sysrq_key_op sysrq_crashdump_op = {
106 .handler = sysrq_handle_crashdump, 106 .handler = sysrq_handle_crashdump,