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authorMasami Hiramatsu <mhiramat@redhat.com>2007-10-16 04:27:49 -0400
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-16 12:43:10 -0400
commitf438d914b220051d4cbc65cbc5d98e163c85c93b (patch)
tree75e7fda155a8494595f6ae0539bbb64ef98230f6 /arch/powerpc/kernel/kprobes.c
parent49dce689ad4ef0fd1f970ef762168e4bd46f69a3 (diff)
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 <mhiramat@redhat.com> Cc: Prasanna S Panchamukhi <prasanna@in.ibm.com> Acked-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/powerpc/kernel/kprobes.c')
-rw-r--r--arch/powerpc/kernel/kprobes.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/kprobes.c b/arch/powerpc/kernel/kprobes.c
index 440f5a87271f..5338e4855712 100644
--- a/arch/powerpc/kernel/kprobes.c
+++ b/arch/powerpc/kernel/kprobes.c
@@ -38,6 +38,8 @@
38DEFINE_PER_CPU(struct kprobe *, current_kprobe) = NULL; 38DEFINE_PER_CPU(struct kprobe *, current_kprobe) = NULL;
39DEFINE_PER_CPU(struct kprobe_ctlblk, kprobe_ctlblk); 39DEFINE_PER_CPU(struct kprobe_ctlblk, kprobe_ctlblk);
40 40
41struct kretprobe_blackpoint kretprobe_blacklist[] = {{NULL, NULL}};
42
41int __kprobes arch_prepare_kprobe(struct kprobe *p) 43int __kprobes arch_prepare_kprobe(struct kprobe *p)
42{ 44{
43 int ret = 0; 45 int ret = 0;