xref: /openbmc/linux/include/trace/syscall.h (revision d7a3d85e)
1 #ifndef _TRACE_SYSCALL_H
2 #define _TRACE_SYSCALL_H
3 
4 #include <linux/tracepoint.h>
5 #include <linux/unistd.h>
6 #include <linux/ftrace_event.h>
7 #include <linux/thread_info.h>
8 
9 #include <asm/ptrace.h>
10 
11 
12 /*
13  * A syscall entry in the ftrace syscalls array.
14  *
15  * @name: name of the syscall
16  * @syscall_nr: number of the syscall
17  * @nb_args: number of parameters it takes
18  * @types: list of types as strings
19  * @args: list of args as strings (args[i] matches types[i])
20  * @enter_fields: list of fields for syscall_enter trace event
21  * @enter_event: associated syscall_enter trace event
22  * @exit_event: associated syscall_exit trace event
23  */
24 struct syscall_metadata {
25 	const char	*name;
26 	int		syscall_nr;
27 	int		nb_args;
28 	const char	**types;
29 	const char	**args;
30 	struct list_head enter_fields;
31 
32 	struct ftrace_event_call *enter_event;
33 	struct ftrace_event_call *exit_event;
34 };
35 
36 #if defined(CONFIG_TRACEPOINTS) && defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS)
37 static inline void syscall_tracepoint_update(struct task_struct *p)
38 {
39 	if (test_thread_flag(TIF_SYSCALL_TRACEPOINT))
40 		set_tsk_thread_flag(p, TIF_SYSCALL_TRACEPOINT);
41 	else
42 		clear_tsk_thread_flag(p, TIF_SYSCALL_TRACEPOINT);
43 }
44 #else
45 static inline void syscall_tracepoint_update(struct task_struct *p)
46 {
47 }
48 #endif
49 
50 #endif /* _TRACE_SYSCALL_H */
51