Messages in this thread Patch in this message | | | From | Tom Zanussi <> | Subject | [PATCH v12 05/30] tracing: Add get_syscall_name() | Date | Mon, 23 Nov 2015 13:51:20 -0600 |
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Add a utility function to grab the syscall name from the syscall metadata, given a syscall id.
Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com> Tested-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.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 c8cf683..5d5fede 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -1395,8 +1395,13 @@ 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 0655afb..50be560 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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