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 * @user_arg_is_str: set if the arg for @user_arg_size is a string
20 * @user_arg_size: holds @arg that has size of the user space to read
21 * @user_mask: mask of @args that will read user space
22 * @types: list of types as strings
23 * @args: list of args as strings (args[i] matches types[i])
24 * @enter_fields: list of fields for syscall_enter trace event
25 * @enter_event: associated syscall_enter trace event
26 * @exit_event: associated syscall_exit trace event
27 */
28struct syscall_metadata {
29 const char *name;
30 int syscall_nr;
31 u8 nb_args:7;
32 u8 user_arg_is_str:1;
33 s8 user_arg_size;
34 short user_mask;
35 const char **types;
36 const char **args;
37 struct list_head enter_fields;
38
39 struct trace_event_call *enter_event;
40 struct trace_event_call *exit_event;
41};
42
43#if defined(CONFIG_TRACEPOINTS) && defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS)
44static inline void syscall_tracepoint_update(struct task_struct *p)
45{
46 if (test_syscall_work(SYSCALL_TRACEPOINT))
47 set_task_syscall_work(p, SYSCALL_TRACEPOINT);
48 else
49 clear_task_syscall_work(p, SYSCALL_TRACEPOINT);
50}
51#else
52static inline void syscall_tracepoint_update(struct task_struct *p)
53{
54}
55#endif
56
57#endif /* _TRACE_SYSCALL_H */
58

source code of linux/include/trace/syscall.h