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Message-Id: <ec5c8d5a606e6967a675bade49b30249019ab5df.1432151408.git.tom.zanussi@linux.intel.com>
Date: Wed, 20 May 2015 16:19:51 -0500
From: Tom Zanussi <tom.zanussi@...ux.intel.com>
To: rostedt@...dmis.org
Cc: daniel.wagner@...-carit.de, masami.hiramatsu.pt@...achi.com,
namhyung@...nel.org, josh@...htriplett.org, andi@...stfloor.org,
linux-kernel@...r.kernel.org,
Tom Zanussi <tom.zanussi@...ux.intel.com>
Subject: [PATCH v5 04/10] tracing: Add get_syscall_name()
Add a utility function to grab the syscall name from the syscall
metadata, given a syscall id.
Signed-off-by: Tom Zanussi <tom.zanussi@...ux.intel.com>
---
kernel/trace/trace.h | 5 +++++
kernel/trace/trace_syscalls.c | 11 +++++++++++
2 files changed, 16 insertions(+)
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 6935bf5..46555ba 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -1317,8 +1317,13 @@ int perf_ftrace_event_register(struct ftrace_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 f97f6e3..d137e0a 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)
--
1.9.3
--
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