From f438d914b220051d4cbc65cbc5d98e163c85c93b Mon Sep 17 00:00:00 2001 From: Masami Hiramatsu Date: Tue, 16 Oct 2007 01:27:49 -0700 Subject: kprobes: support kretprobe blacklist Introduce architecture dependent kretprobe blacklists to prohibit users from inserting return probes on the function in which kprobes can be inserted but kretprobes can not. This patch also removes "__kprobes" mark from "__switch_to" on x86_64 and registers "__switch_to" to the blacklist on x86-64, because that mark is to prohibit user from inserting only kretprobe. Signed-off-by: Masami Hiramatsu Cc: Prasanna S Panchamukhi Acked-by: Ananth N Mavinakayanahalli Cc: Anil S Keshavamurthy Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/s390/kernel/kprobes.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'arch/s390/kernel/kprobes.c') diff --git a/arch/s390/kernel/kprobes.c b/arch/s390/kernel/kprobes.c index e40373d9fbce..c5549a206284 100644 --- a/arch/s390/kernel/kprobes.c +++ b/arch/s390/kernel/kprobes.c @@ -33,6 +33,8 @@ DEFINE_PER_CPU(struct kprobe *, current_kprobe) = NULL; DEFINE_PER_CPU(struct kprobe_ctlblk, kprobe_ctlblk); +struct kretprobe_blackpoint kretprobe_blacklist[] = {{NULL, NULL}}; + int __kprobes arch_prepare_kprobe(struct kprobe *p) { /* Make sure the probe isn't going on a difficult instruction */ -- cgit v1.2.3