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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2010-07-05 03:20:53 (GMT) |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-07-05 03:20:53 (GMT) |
| commit | 3f7d7b4bded5bd2cc9934a2ed9a7ce68feb636b0 (patch) | |
| tree | 2667a923fedcbf8324dde93f0acc17879fa7d862 /arch/x86/kernel | |
| parent | ff49d74ad383f54041378144ca1a229ee9aeaa59 (diff) | |
| parent | f287d332ce835f77a4f5077d2c0ef1e3f9ea42d2 (diff) | |
| download | linux-3f7d7b4bded5bd2cc9934a2ed9a7ce68feb636b0.tar.xz | |
Merge branch 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
perf, x86: Fix incorrect branches event on AMD CPUs
perf tools: Fix find tids routine by excluding "." and ".."
x86: Send a SIGTRAP for user icebp traps
Diffstat (limited to 'arch/x86/kernel')
| -rw-r--r-- | arch/x86/kernel/cpu/perf_event_amd.c | 4 | ||||
| -rw-r--r-- | arch/x86/kernel/traps.c | 11 |
2 files changed, 12 insertions, 3 deletions
diff --git a/arch/x86/kernel/cpu/perf_event_amd.c b/arch/x86/kernel/cpu/perf_event_amd.c index 611df11..c2897b7 100644 --- a/arch/x86/kernel/cpu/perf_event_amd.c +++ b/arch/x86/kernel/cpu/perf_event_amd.c @@ -102,8 +102,8 @@ static const u64 amd_perfmon_event_map[] = [PERF_COUNT_HW_INSTRUCTIONS] = 0x00c0, [PERF_COUNT_HW_CACHE_REFERENCES] = 0x0080, [PERF_COUNT_HW_CACHE_MISSES] = 0x0081, - [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = 0x00c4, - [PERF_COUNT_HW_BRANCH_MISSES] = 0x00c5, + [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = 0x00c2, + [PERF_COUNT_HW_BRANCH_MISSES] = 0x00c3, }; static u64 amd_pmu_event_map(int hw_event) diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c index 142d70c..725ef4d 100644 --- a/arch/x86/kernel/traps.c +++ b/arch/x86/kernel/traps.c @@ -526,6 +526,7 @@ asmlinkage __kprobes struct pt_regs *sync_regs(struct pt_regs *eregs) dotraplinkage void __kprobes do_debug(struct pt_regs *regs, long error_code) { struct task_struct *tsk = current; + int user_icebp = 0; unsigned long dr6; int si_code; @@ -534,6 +535,14 @@ dotraplinkage void __kprobes do_debug(struct pt_regs *regs, long error_code) /* Filter out all the reserved bits which are preset to 1 */ dr6 &= ~DR6_RESERVED; + /* + * If dr6 has no reason to give us about the origin of this trap, + * then it's very likely the result of an icebp/int01 trap. + * User wants a sigtrap for that. + */ + if (!dr6 && user_mode(regs)) + user_icebp = 1; + /* Catch kmemcheck conditions first of all! */ if ((dr6 & DR_STEP) && kmemcheck_trap(regs)) return; @@ -575,7 +584,7 @@ dotraplinkage void __kprobes do_debug(struct pt_regs *regs, long error_code) regs->flags &= ~X86_EFLAGS_TF; } si_code = get_si_code(tsk->thread.debugreg6); - if (tsk->thread.debugreg6 & (DR_STEP | DR_TRAP_BITS)) + if (tsk->thread.debugreg6 & (DR_STEP | DR_TRAP_BITS) || user_icebp) send_sigtrap(tsk, regs, error_code, si_code); preempt_conditional_cli(regs); |