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| author | Avi Kivity <avi@redhat.com> | 2010-04-19 12:52:53 +0300 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2010-05-17 12:17:58 +0300 |
| commit | 9beeaa2d689842f7760aa16c512e6bb8182d38b6 (patch) | |
| tree | 62cea0772127c4b1c0b476e46dec6830d36809c1 /arch/x86/kernel/kprobes.c | |
| parent | 3246af0ece6c61689847417977733f0b12dc4b6f (diff) | |
| parent | a1645ce12adb6c9cc9e19d7695466204e3f017fe (diff) | |
| download | op-kernel-dev-9beeaa2d689842f7760aa16c512e6bb8182d38b6.zip op-kernel-dev-9beeaa2d689842f7760aa16c512e6bb8182d38b6.tar.gz | |
Merge branch 'perf'
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/x86/kernel/kprobes.c')
| -rw-r--r-- | arch/x86/kernel/kprobes.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/arch/x86/kernel/kprobes.c b/arch/x86/kernel/kprobes.c index b43bbae..f2f56c0 100644 --- a/arch/x86/kernel/kprobes.c +++ b/arch/x86/kernel/kprobes.c @@ -422,14 +422,22 @@ static void __kprobes set_current_kprobe(struct kprobe *p, struct pt_regs *regs, static void __kprobes clear_btf(void) { - if (test_thread_flag(TIF_DEBUGCTLMSR)) - update_debugctlmsr(0); + if (test_thread_flag(TIF_BLOCKSTEP)) { + unsigned long debugctl = get_debugctlmsr(); + + debugctl &= ~DEBUGCTLMSR_BTF; + update_debugctlmsr(debugctl); + } } static void __kprobes restore_btf(void) { - if (test_thread_flag(TIF_DEBUGCTLMSR)) - update_debugctlmsr(current->thread.debugctlmsr); + if (test_thread_flag(TIF_BLOCKSTEP)) { + unsigned long debugctl = get_debugctlmsr(); + + debugctl |= DEBUGCTLMSR_BTF; + update_debugctlmsr(debugctl); + } } void __kprobes arch_prepare_kretprobe(struct kretprobe_instance *ri, |
