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| author | David A. Long <dave.long@linaro.org> | 2014-02-03 14:25:49 -0500 |
|---|---|---|
| committer | David A. Long <dave.long@linaro.org> | 2014-03-18 16:39:34 -0400 |
| commit | 6fe50a28ba6e5fafb4a549dea666dd15297dd8bd (patch) | |
| tree | 998f67b5bb336339c5308e000b0f8f5c9e97a44e /kernel/events | |
| parent | 21254ebc9e509967317ad8c6922797e21137ad53 (diff) | |
| download | blackbird-op-linux-6fe50a28ba6e5fafb4a549dea666dd15297dd8bd.tar.gz blackbird-op-linux-6fe50a28ba6e5fafb4a549dea666dd15297dd8bd.zip | |
uprobes: allow ignoring of probe hits
Allow arches to decided to ignore a probe hit. ARM will use this to
only call handlers if the conditions to execute a conditionally executed
instruction are satisfied.
Signed-off-by: David A. Long <dave.long@linaro.org>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Diffstat (limited to 'kernel/events')
| -rw-r--r-- | kernel/events/uprobes.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c index 307d87c0991a..04709b66369d 100644 --- a/kernel/events/uprobes.c +++ b/kernel/events/uprobes.c @@ -1804,6 +1804,11 @@ static bool handle_trampoline(struct pt_regs *regs) return true; } +bool __weak arch_uprobe_ignore(struct arch_uprobe *aup, struct pt_regs *regs) +{ + return false; +} + /* * Run handler and ask thread to singlestep. * Ensure all non-fatal signals cannot interrupt thread while it singlesteps. @@ -1858,7 +1863,11 @@ static void handle_swbp(struct pt_regs *regs) if (!get_utask()) goto out; + if (arch_uprobe_ignore(&uprobe->arch, regs)) + goto out; + handler_chain(uprobe, regs); + if (can_skip_sstep(uprobe, regs)) goto out; |
