diff options
| author | Ingo Molnar <mingo@elte.hu> | 2010-03-12 10:20:57 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-03-12 10:20:59 +0100 |
| commit | 937779db13fb6cb621e28d9ae0a6cf1d05b57d05 (patch) | |
| tree | 6c27402677c347c4dc01980de78c270630588847 /include/linux/perf_event.h | |
| parent | 6230f2c7ef01a69e2ba9370326572c287209d32a (diff) | |
| parent | 9f591fd76afdc0e5192e9ed00a36f8efc0b4dfe6 (diff) | |
Merge branch 'perf/urgent' into perf/core
Merge reason: We want to queue up a dependent patch.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux/perf_event.h')
| -rw-r--r-- | include/linux/perf_event.h | 43 |
1 files changed, 42 insertions, 1 deletions
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index be85f7c4a94f..2bccb7b9da2d 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -459,6 +459,8 @@ enum perf_callchain_context { #include <linux/fs.h> #include <linux/pid_namespace.h> #include <linux/workqueue.h> +#include <linux/ftrace.h> +#include <linux/cpu.h> #include <asm/atomic.h> #define PERF_MAX_STACK_DEPTH 255 @@ -865,6 +867,44 @@ perf_sw_event(u32 event_id, u64 nr, int nmi, struct pt_regs *regs, u64 addr) __perf_sw_event(event_id, nr, nmi, regs, addr); } +extern void +perf_arch_fetch_caller_regs(struct pt_regs *regs, unsigned long ip, int skip); + +/* + * Take a snapshot of the regs. Skip ip and frame pointer to + * the nth caller. We only need a few of the regs: + * - ip for PERF_SAMPLE_IP + * - cs for user_mode() tests + * - bp for callchains + * - eflags, for future purposes, just in case + */ +static inline void perf_fetch_caller_regs(struct pt_regs *regs, int skip) +{ + unsigned long ip; + + memset(regs, 0, sizeof(*regs)); + + switch (skip) { + case 1 : + ip = CALLER_ADDR0; + break; + case 2 : + ip = CALLER_ADDR1; + break; + case 3 : + ip = CALLER_ADDR2; + break; + case 4: + ip = CALLER_ADDR3; + break; + /* No need to support further for now */ + default: + ip = 0; + } + + return perf_arch_fetch_caller_regs(regs, ip, skip); +} + extern void __perf_event_mmap(struct vm_area_struct *vma); static inline void perf_event_mmap(struct vm_area_struct *vma) @@ -898,7 +938,8 @@ static inline bool perf_paranoid_kernel(void) } extern void perf_event_init(void); -extern void perf_tp_event(int event_id, u64 addr, u64 count, void *record, int entry_size); +extern void perf_tp_event(int event_id, u64 addr, u64 count, void *record, + int entry_size, struct pt_regs *regs); extern void perf_bp_event(struct perf_event *event, void *data); #ifndef perf_misc_flags |