1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_KERNEL_FTRACE_INTERNAL_H
3 #define _LINUX_KERNEL_FTRACE_INTERNAL_H
4
5 int __register_ftrace_function(struct ftrace_ops *ops);
6 int __unregister_ftrace_function(struct ftrace_ops *ops);
7
8 #ifdef CONFIG_FUNCTION_TRACER
9
10 extern struct mutex ftrace_lock;
11 extern struct ftrace_ops global_ops;
12
13 #ifdef CONFIG_DYNAMIC_FTRACE
14
15 int ftrace_startup(struct ftrace_ops *ops, int command);
16 int ftrace_shutdown(struct ftrace_ops *ops, int command);
17 int ftrace_ops_test(struct ftrace_ops *ops, unsigned long ip, void *regs);
18
19 #else /* !CONFIG_DYNAMIC_FTRACE */
20
21 /* Keep as macros so we do not need to define the commands */
22 # define ftrace_startup(ops, command) \
23 ({ \
24 int ___ret = __register_ftrace_function(ops); \
25 if (!___ret) \
26 (ops)->flags |= FTRACE_OPS_FL_ENABLED; \
27 ___ret; \
28 })
29 # define ftrace_shutdown(ops, command) \
30 ({ \
31 int ___ret = __unregister_ftrace_function(ops); \
32 if (!___ret) \
33 (ops)->flags &= ~FTRACE_OPS_FL_ENABLED; \
34 ___ret; \
35 })
36 static inline int
ftrace_ops_test(struct ftrace_ops * ops,unsigned long ip,void * regs)37 ftrace_ops_test(struct ftrace_ops *ops, unsigned long ip, void *regs)
38 {
39 return 1;
40 }
41 #endif /* CONFIG_DYNAMIC_FTRACE */
42
43 #ifdef CONFIG_FUNCTION_GRAPH_TRACER
44 extern int ftrace_graph_active;
45 void update_function_graph_func(void);
46 #else /* !CONFIG_FUNCTION_GRAPH_TRACER */
47 # define ftrace_graph_active 0
update_function_graph_func(void)48 static inline void update_function_graph_func(void) { }
49 #endif /* CONFIG_FUNCTION_GRAPH_TRACER */
50
51 #else /* !CONFIG_FUNCTION_TRACER */
52 #endif /* CONFIG_FUNCTION_TRACER */
53
54 #endif
55