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
 8#include <asm/ptrace.h>
 9
10
11/*
12 * A syscall entry in the ftrace syscalls array.
13 *
14 * @name: name of the syscall
15 * @syscall_nr: number of the syscall
16 * @nb_args: number of parameters it takes
17 * @types: list of types as strings
18 * @args: list of args as strings (args[i] matches types[i])
 
19 * @enter_event: associated syscall_enter trace event
20 * @exit_event: associated syscall_exit trace event
21 */
22struct syscall_metadata {
23	const char	*name;
24	int		syscall_nr;
25	int		nb_args;
26	const char	**types;
27	const char	**args;
28	struct list_head enter_fields;
29
30	struct ftrace_event_call *enter_event;
31	struct ftrace_event_call *exit_event;
32};
33
34#ifdef CONFIG_FTRACE_SYSCALLS
35extern unsigned long arch_syscall_addr(int nr);
36extern int init_syscall_trace(struct ftrace_event_call *call);
37
38extern int reg_event_syscall_enter(struct ftrace_event_call *call);
39extern void unreg_event_syscall_enter(struct ftrace_event_call *call);
40extern int reg_event_syscall_exit(struct ftrace_event_call *call);
41extern void unreg_event_syscall_exit(struct ftrace_event_call *call);
42extern int
43ftrace_format_syscall(struct ftrace_event_call *call, struct trace_seq *s);
44enum print_line_t print_syscall_enter(struct trace_iterator *iter, int flags,
45				      struct trace_event *event);
46enum print_line_t print_syscall_exit(struct trace_iterator *iter, int flags,
47				     struct trace_event *event);
48#endif
49
50#ifdef CONFIG_PERF_EVENTS
51int perf_sysenter_enable(struct ftrace_event_call *call);
52void perf_sysenter_disable(struct ftrace_event_call *call);
53int perf_sysexit_enable(struct ftrace_event_call *call);
54void perf_sysexit_disable(struct ftrace_event_call *call);
55#endif
56
57#endif /* _TRACE_SYSCALL_H */

 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 */