From: Rusty Lynch Date: Thu, 23 Jun 2005 07:09:31 +0000 (-0700) Subject: [PATCH] Kprobes ia64 qp fix X-Git-Tag: v2.6.13-rc1~68^2~440 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=13608d6433eb34840224ef632cc444f3eb59bc13;p=linux-2.6 [PATCH] Kprobes ia64 qp fix Fix a bug where a kprobe still fires when the instruction is predicated off. So given the p6=0, and we have an instruction like: (p6) move loc1=0 we should not be triggering the kprobe. This is handled by carrying over the qp section of the original instruction into the break instruction. Signed-off-by: Anil S Keshavamurthy Signed-off-by: Rusty Lynch Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/arch/ia64/kernel/kprobes.c b/arch/ia64/kernel/kprobes.c index b7a204137f..98bef04d94 100644 --- a/arch/ia64/kernel/kprobes.c +++ b/arch/ia64/kernel/kprobes.c @@ -115,19 +115,19 @@ int arch_prepare_kprobe(struct kprobe *p) case 0: major_opcode = (bundle->quad0.slot0 >> SLOT0_OPCODE_SHIFT); kprobe_inst = bundle->quad0.slot0; - bundle->quad0.slot0 = BREAK_INST; + bundle->quad0.slot0 = BREAK_INST | (0x3f & kprobe_inst); break; case 1: major_opcode = (bundle->quad1.slot1_p1 >> SLOT1_p1_OPCODE_SHIFT); kprobe_inst = (bundle->quad0.slot1_p0 | (bundle->quad1.slot1_p1 << (64-46))); - bundle->quad0.slot1_p0 = BREAK_INST; + bundle->quad0.slot1_p0 = BREAK_INST | (0x3f & kprobe_inst); bundle->quad1.slot1_p1 = (BREAK_INST >> (64-46)); break; case 2: major_opcode = (bundle->quad1.slot2 >> SLOT2_OPCODE_SHIFT); kprobe_inst = bundle->quad1.slot2; - bundle->quad1.slot2 = BREAK_INST; + bundle->quad1.slot2 = BREAK_INST | (0x3f & kprobe_inst); break; }