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-rw-r--r--include/linux/ftrace_event.h7
-rw-r--r--include/trace/ftrace.h6
-rw-r--r--kernel/perf_event.c8
-rw-r--r--kernel/trace/trace_event_profile.c3
-rw-r--r--kernel/trace/trace_kprobe.c5
-rw-r--r--kernel/trace/trace_syscalls.c4
6 files changed, 19 insertions, 14 deletions
diff --git a/include/linux/ftrace_event.h b/include/linux/ftrace_event.h
index 6b7c444..ac424f1 100644
--- a/include/linux/ftrace_event.h
+++ b/include/linux/ftrace_event.h
@@ -187,6 +187,9 @@ do { \
#ifdef CONFIG_PERF_EVENTS
struct perf_event;
+
+DECLARE_PER_CPU(struct pt_regs, perf_trace_regs);
+
extern int ftrace_profile_enable(int event_id);
extern void ftrace_profile_disable(int event_id);
extern int ftrace_profile_set_filter(struct perf_event *event, int event_id,
@@ -198,11 +201,11 @@ ftrace_perf_buf_prepare(int size, unsigned short type, int *rctxp,
static inline void
ftrace_perf_buf_submit(void *raw_data, int size, int rctx, u64 addr,
- u64 count, unsigned long irq_flags)
+ u64 count, unsigned long irq_flags, struct pt_regs *regs)
{
struct trace_entry *entry = raw_data;
- perf_tp_event(entry->type, addr, count, raw_data, size);
+ perf_tp_event(entry->type, addr, count, raw_data, size, regs);
perf_swevent_put_recursion_context(rctx);
local_irq_restore(irq_flags);
}
diff --git a/include/trace/ftrace.h b/include/trace/ftrace.h
index 0804cd5..f31bb8b 100644
--- a/include/trace/ftrace.h
+++ b/include/trace/ftrace.h
@@ -764,6 +764,7 @@ ftrace_profile_templ_##call(struct ftrace_event_call *event_call, \
struct ftrace_raw_##call *entry; \
u64 __addr = 0, __count = 1; \
unsigned long irq_flags; \
+ struct pt_regs *__regs; \
int __entry_size; \
int __data_size; \
int rctx; \
@@ -784,8 +785,11 @@ ftrace_profile_templ_##call(struct ftrace_event_call *event_call, \
\
{ assign; } \
\
+ __regs = &__get_cpu_var(perf_trace_regs); \
+ perf_fetch_caller_regs(__regs, 2); \
+ \
ftrace_perf_buf_submit(entry, __entry_size, rctx, __addr, \
- __count, irq_flags); \
+ __count, irq_flags, __regs); \
}
#undef DEFINE_EVENT
diff --git a/kernel/perf_event.c b/kernel/perf_event.c
index 359d7f6..45b4b6e 100644
--- a/kernel/perf_event.c
+++ b/kernel/perf_event.c
@@ -4318,9 +4318,8 @@ static const struct pmu perf_ops_task_clock = {
#ifdef CONFIG_EVENT_TRACING
void perf_tp_event(int event_id, u64 addr, u64 count, void *record,
- int entry_size)
+ int entry_size, struct pt_regs *regs)
{
- struct pt_regs *regs = get_irq_regs();
struct perf_sample_data data;
struct perf_raw_record raw = {
.size = entry_size,
@@ -4330,12 +4329,9 @@ void perf_tp_event(int event_id, u64 addr, u64 count, void *record,
perf_sample_data_init(&data, addr);
data.raw = &raw;
- if (!regs)
- regs = task_pt_regs(current);
-
/* Trace events already protected against recursion */
do_perf_sw_event(PERF_TYPE_TRACEPOINT, event_id, count, 1,
- &data, regs);
+ &data, regs);
}
EXPORT_SYMBOL_GPL(perf_tp_event);
diff --git a/kernel/trace/trace_event_profile.c b/kernel/trace/trace_event_profile.c
index f0d6930..e66d21e 100644
--- a/kernel/trace/trace_event_profile.c
+++ b/kernel/trace/trace_event_profile.c
@@ -2,13 +2,14 @@
* trace event based perf counter profiling
*
* Copyright (C) 2009 Red Hat Inc, Peter Zijlstra <pzijlstr@redhat.com>
- *
+ * Copyright (C) 2009-2010 Frederic Weisbecker <fweisbec@gmail.com>
*/
#include <linux/module.h>
#include <linux/kprobes.h>
#include "trace.h"
+DEFINE_PER_CPU(struct pt_regs, perf_trace_regs);
static char *perf_trace_buf;
static char *perf_trace_buf_nmi;
diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
index 505c922..f7a20a8 100644
--- a/kernel/trace/trace_kprobe.c
+++ b/kernel/trace/trace_kprobe.c
@@ -1240,7 +1240,7 @@ static __kprobes void kprobe_profile_func(struct kprobe *kp,
for (i = 0; i < tp->nr_args; i++)
entry->args[i] = call_fetch(&tp->args[i].fetch, regs);
- ftrace_perf_buf_submit(entry, size, rctx, entry->ip, 1, irq_flags);
+ ftrace_perf_buf_submit(entry, size, rctx, entry->ip, 1, irq_flags, regs);
}
/* Kretprobe profile handler */
@@ -1271,7 +1271,8 @@ static __kprobes void kretprobe_profile_func(struct kretprobe_instance *ri,
for (i = 0; i < tp->nr_args; i++)
entry->args[i] = call_fetch(&tp->args[i].fetch, regs);
- ftrace_perf_buf_submit(entry, size, rctx, entry->ret_ip, 1, irq_flags);
+ ftrace_perf_buf_submit(entry, size, rctx, entry->ret_ip, 1,
+ irq_flags, regs);
}
static int probe_profile_enable(struct ftrace_event_call *call)
diff --git a/kernel/trace/trace_syscalls.c b/kernel/trace/trace_syscalls.c
index cba47d7..7e6e84f 100644
--- a/kernel/trace/trace_syscalls.c
+++ b/kernel/trace/trace_syscalls.c
@@ -467,7 +467,7 @@ static void prof_syscall_enter(struct pt_regs *regs, long id)
rec->nr = syscall_nr;
syscall_get_arguments(current, regs, 0, sys_data->nb_args,
(unsigned long *)&rec->args);
- ftrace_perf_buf_submit(rec, size, rctx, 0, 1, flags);
+ ftrace_perf_buf_submit(rec, size, rctx, 0, 1, flags, regs);
}
int prof_sysenter_enable(struct ftrace_event_call *call)
@@ -542,7 +542,7 @@ static void prof_syscall_exit(struct pt_regs *regs, long ret)
rec->nr = syscall_nr;
rec->ret = syscall_get_return_value(current, regs);
- ftrace_perf_buf_submit(rec, size, rctx, 0, 1, flags);
+ ftrace_perf_buf_submit(rec, size, rctx, 0, 1, flags, regs);
}
int prof_sysexit_enable(struct ftrace_event_call *call)
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