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authorTom Zanussi <tom.zanussi@linux.intel.com>2015-12-10 12:50:46 -0600
committerSteven Rostedt <rostedt@goodmis.org>2016-03-08 11:19:32 -0500
commitdbfeaa7abae4f105afdf8ed4f85b5879cff136ea (patch)
treed9dc6d2f9d1336bd817c6fc4a8f6af1b797a505e /kernel/trace
parentc4a5923055c9e0c87dfc0387f7cda5ee2bbac3c1 (diff)
tracing: Add get_syscall_name()
Add a utility function to grab the syscall name from the syscall metadata, given a syscall id. Link: http://lkml.kernel.org/r/be26a8dfe3f15e16a837799f1c1e2b4d62742843.1449767187.git.tom.zanussi@linux.intel.com Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com> Tested-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Reviewed-by: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace')
-rw-r--r--kernel/trace/trace.h5
-rw-r--r--kernel/trace/trace_syscalls.c11
2 files changed, 16 insertions, 0 deletions
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index c10456e72106..0044b91d5469 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -1394,8 +1394,13 @@ int perf_ftrace_event_register(struct trace_event_call *call,
#ifdef CONFIG_FTRACE_SYSCALLS
void init_ftrace_syscalls(void);
+const char *get_syscall_name(int syscall);
#else
static inline void init_ftrace_syscalls(void) { }
+static inline const char *get_syscall_name(int syscall)
+{
+ return NULL;
+}
#endif
#ifdef CONFIG_EVENT_TRACING
diff --git a/kernel/trace/trace_syscalls.c b/kernel/trace/trace_syscalls.c
index 0655afbea83f..50be5602217c 100644
--- a/kernel/trace/trace_syscalls.c
+++ b/kernel/trace/trace_syscalls.c
@@ -106,6 +106,17 @@ static struct syscall_metadata *syscall_nr_to_meta(int nr)
return syscalls_metadata[nr];
}
+const char *get_syscall_name(int syscall)
+{
+ struct syscall_metadata *entry;
+
+ entry = syscall_nr_to_meta(syscall);
+ if (!entry)
+ return NULL;
+
+ return entry->name;
+}
+
static enum print_line_t
print_syscall_enter(struct trace_iterator *iter, int flags,
struct trace_event *event)