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| author | Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> | 2014-04-17 17:16:51 +0900 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2014-04-24 10:02:55 +0200 |
| commit | 6a5022a56ac37da7bffece043331a101ed0040b1 (patch) | |
| tree | efe8e5aadff08546e7a2836bf992961601a2d213 /fs | |
| parent | 4d0fa8a0f01272d4de33704f20303dcecdb55df1 (diff) | |
| download | blackbird-op-linux-6a5022a56ac37da7bffece043331a101ed0040b1.tar.gz blackbird-op-linux-6a5022a56ac37da7bffece043331a101ed0040b1.zip | |
kprobes/x86: Allow to handle reentered kprobe on single-stepping
Since the NMI handlers(e.g. perf) can interrupt in the
single stepping (or preparing the single stepping, do_debug
etc.), we should consider a kprobe is hit in the NMI
handler. Even in that case, the kprobe is allowed to be
reentered as same as the kprobes hit in kprobe handlers
(KPROBE_HIT_ACTIVE or KPROBE_HIT_SSDONE).
The real issue will happen when a kprobe hit while another
reentered kprobe is processing (KPROBE_REENTER), because
we already consumed a saved-area for the previous kprobe.
Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Reviewed-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Jonathan Lebon <jlebon@redhat.com>
Link: http://lkml.kernel.org/r/20140417081651.26341.10593.stgit@ltc230.yrl.intra.hitachi.co.jp
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'fs')
0 files changed, 0 insertions, 0 deletions
