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authorFrederic Weisbecker <fweisbec@gmail.com>2009-03-07 05:52:59 +0100
committerIngo Molnar <mingo@elte.hu>2009-03-13 06:25:43 +0100
commitee08c6eccb7d1295516f7cf420fddf7b14e9146f (patch)
treeec6d209e47bb1a8910d16c1c8b4ea65959850689 /include
parent4c6ed8f496fe89ff81b3d6e617a531bedfb613e4 (diff)
downloadop-kernel-dev-ee08c6eccb7d1295516f7cf420fddf7b14e9146f.zip
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tracing/ftrace: syscall tracing infrastructure, basics
Provide basic callbacks to do syscall tracing. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Acked-by: Steven Rostedt <rostedt@goodmis.org> Cc: Lai Jiangshan <laijs@cn.fujitsu.com> LKML-Reference: <1236401580-5758-2-git-send-email-fweisbec@gmail.com> [ simplified it to a trace_printk() for now. ] Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include')
-rw-r--r--include/linux/ftrace.h21
1 files changed, 21 insertions, 0 deletions
diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h
index e1583f2..c146c10 100644
--- a/include/linux/ftrace.h
+++ b/include/linux/ftrace.h
@@ -503,4 +503,25 @@ static inline void trace_hw_branch_oops(void) {}
#endif /* CONFIG_HW_BRANCH_TRACER */
+/*
+ * A syscall entry in the ftrace syscalls array.
+ *
+ * @syscall_nr: syscall number
+ */
+struct syscall_trace_entry {
+ int syscall_nr;
+};
+
+#ifdef CONFIG_FTRACE_SYSCALLS
+extern void start_ftrace_syscalls(void);
+extern void stop_ftrace_syscalls(void);
+extern void ftrace_syscall_enter(struct pt_regs *regs);
+extern void ftrace_syscall_exit(struct pt_regs *regs);
+#else
+static inline void start_ftrace_syscalls(void) { }
+static inline void stop_ftrace_syscalls(void) { }
+static inline void ftrace_syscall_enter(struct pt_regs *regs) { }
+static inline void ftrace_syscall_exit(struct pt_regs *regs) { }
+#endif
+
#endif /* _LINUX_FTRACE_H */
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