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DateWed, 8 Jun 2005 15:33:43 +1000
FromPaul Mackerras <>
Subject[PATCH] ppc64 kprobes: don't eat dabr/iabr exceptions
From: Ananth N Mavinakayanahalli <amavin@redhat.com>

Kprobes was eating the hardware instruction and data address
breakpoint exceptions.  This patch fixes it; kprobes doesn't use those
exceptions at all and should ignore them.

Signed-off-by: Ananth N Mavinakayanahalli <amavin@redhat.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

diff -urN linux-2.6/arch/ppc64/kernel/kprobes.c g5-ppc64/arch/ppc64/kernel/kprobes.c
--- linux-2.6/arch/ppc64/kernel/kprobes.c	2005-04-26 15:37:55.000000000 +1000
+++ g5-ppc64/arch/ppc64/kernel/kprobes.c	2005-06-08 15:16:51.000000000 +1000
@@ -237,8 +237,6 @@
 	 */
 	preempt_disable();
 	switch (val) {
-	case DIE_IABR_MATCH:
-	case DIE_DABR_MATCH:
 	case DIE_BPT:
 		if (kprobe_handler(args->regs))
 			ret = NOTIFY_STOP;
-
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