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 */
25 struct 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)
38 static inline void syscall_tracepoint_update(struct task_struct *p)
39 {
40 if (test_syscall_work(SYSCALL_TRACEPOINT))
41 set_task_syscall_work(p, SYSCALL_TRACEPOINT);
42 else
43 clear_task_syscall_work(p, SYSCALL_TRACEPOINT);
44 }
45 #else
46 static inline void syscall_tracepoint_update(struct task_struct *p)
47 {
48 }
49 #endif
50
51 #endif /* _TRACE_SYSCALL_H */
52
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