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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/sparc64
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/sparc64')
-rw-r--r--arch/sparc64/kernel/kprobes.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/sparc64/kernel/kprobes.c b/arch/sparc64/kernel/kprobes.c
index c93a15b785fa..d94f901d321e 100644
--- a/arch/sparc64/kernel/kprobes.c
+++ b/arch/sparc64/kernel/kprobes.c
@@ -42,6 +42,8 @@
42DEFINE_PER_CPU(struct kprobe *, current_kprobe) = NULL; 42DEFINE_PER_CPU(struct kprobe *, current_kprobe) = NULL;
43DEFINE_PER_CPU(struct kprobe_ctlblk, kprobe_ctlblk); 43DEFINE_PER_CPU(struct kprobe_ctlblk, kprobe_ctlblk);
44 44
45struct kretprobe_blackpoint kretprobe_blacklist[] = {{NULL, NULL}};
46
45int __kprobes arch_prepare_kprobe(struct kprobe *p) 47int __kprobes arch_prepare_kprobe(struct kprobe *p)
46{ 48{
47 p->ainsn.insn[0] = *p->addr; 49 p->ainsn.insn[0] = *p->addr;