From f829fd23c87918374bac0d90404fe12f0e788d52 Mon Sep 17 00:00:00 2001
From: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Date: Wed, 8 Jun 2005 15:50:00 -0700
Subject: [PATCH] [PATCH] ppc64 kprobes: remove spurious MSR_SE masking
Remove spurious MSR_SE reset during kprobe processing.
single_step_exception() already does it for us. Reset it to be safe when
executing the fault_handler.
Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
arch/ppc64/kernel/kprobes.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/arch/ppc64/kernel/kprobes.c b/arch/ppc64/kernel/kprobes.c
index 8f3317244311..e950a2058a19 100644
--- a/arch/ppc64/kernel/kprobes.c
+++ b/arch/ppc64/kernel/kprobes.c
@@ -177,8 +177,6 @@ static void resume_execution(struct kprobe *p, struct pt_regs *regs)
ret = emulate_step(regs, p->ainsn.insn[0]);
if (ret == 0)
regs->nip = (unsigned long)p->addr + 4;
-
- regs->msr &= ~MSR_SE;
}
static inline int post_kprobe_handler(struct pt_regs *regs)
@@ -215,6 +213,7 @@ static inline int kprobe_fault_handler(struct pt_regs *regs, int trapnr)
if (kprobe_status & KPROBE_HIT_SS) {
resume_execution(current_kprobe, regs);
+ regs->msr &= ~MSR_SE;
regs->msr |= kprobe_saved_msr;
unlock_kprobes();
--
2.34.1