1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _TRACE_SYSCALL_H
3#define _TRACE_SYSCALL_H
4
5#include <linux/tracepoint.h>
6#include <linux/unistd.h>
7#include <linux/trace_events.h>
8#include <linux/thread_info.h>
9
10#include <asm/ptrace.h>
11
12
13/*
14 * A syscall entry in the ftrace syscalls array.
15 *
16 * @name: name of the syscall
17 * @syscall_nr: number of the syscall
18 * @nb_args: number of parameters it takes
19 * @types: list of types as strings
20 * @args: list of args as strings (args[i] matches types[i])
21 * @enter_fields: list of fields for syscall_enter trace event
22 * @enter_event: associated syscall_enter trace event
23 * @exit_event: associated syscall_exit trace event
24 */
25struct syscall_metadata {
26 const char *name;
27 int syscall_nr;
28 int nb_args;
29 const char **types;
30 const char **args;
31 struct list_head enter_fields;
32
33 struct trace_event_call *enter_event;
34 struct trace_event_call *exit_event;
35};
36
37#if defined(CONFIG_TRACEPOINTS) && defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS)
38static inline void syscall_tracepoint_update(struct task_struct *p)
39{
40 if (test_thread_flag(TIF_SYSCALL_TRACEPOINT))
41 set_tsk_thread_flag(p, TIF_SYSCALL_TRACEPOINT);
42 else
43 clear_tsk_thread_flag(p, TIF_SYSCALL_TRACEPOINT);
44}
45#else
46static inline void syscall_tracepoint_update(struct task_struct *p)
47{
48}
49#endif
50
51#endif /* _TRACE_SYSCALL_H */
52