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>
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@ -1394,8 +1394,13 @@ int perf_ftrace_event_register(struct trace_event_call *call,
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#ifdef CONFIG_FTRACE_SYSCALLS
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void init_ftrace_syscalls(void);
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const char *get_syscall_name(int syscall);
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#else
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static inline void init_ftrace_syscalls(void) { }
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static inline const char *get_syscall_name(int syscall)
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{
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return NULL;
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}
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#endif
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#ifdef CONFIG_EVENT_TRACING
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@ -106,6 +106,17 @@ static struct syscall_metadata *syscall_nr_to_meta(int nr)
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return syscalls_metadata[nr];
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}
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const char *get_syscall_name(int syscall)
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{
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struct syscall_metadata *entry;
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entry = syscall_nr_to_meta(syscall);
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if (!entry)
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return NULL;
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return entry->name;
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}
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static enum print_line_t
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print_syscall_enter(struct trace_iterator *iter, int flags,
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struct trace_event *event)
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