1 #ifndef _LINUX_FTRACE_H
2 #define _LINUX_FTRACE_H
6 #include <linux/linkage.h>
8 typedef void (*ftrace_func_t)(unsigned long ip, unsigned long parent_ip);
12 struct ftrace_ops *next;
16 * The ftrace_ops must be a static and should also
17 * be read_mostly. These functions do modify read_mostly variables
18 * so use them sparely. Never free an ftrace_op or modify the
19 * next pointer after it has been registered. Even after unregistering
20 * it, the next pointer may still be used internally.
22 int register_ftrace_function(struct ftrace_ops *ops);
23 int unregister_ftrace_function(struct ftrace_ops *ops);
24 void clear_ftrace_function(void);
26 extern void ftrace_stub(unsigned long a0, unsigned long a1);
27 extern void mcount(void);
29 #else /* !CONFIG_FTRACE */
30 # define register_ftrace_function(ops) do { } while (0)
31 # define unregister_ftrace_function(ops) do { } while (0)
32 # define clear_ftrace_function(ops) do { } while (0)
33 #endif /* CONFIG_FTRACE */
36 #ifdef CONFIG_FRAME_POINTER
37 /* TODO: need to fix this for ARM */
38 # define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0))
39 # define CALLER_ADDR1 ((unsigned long)__builtin_return_address(1))
40 # define CALLER_ADDR2 ((unsigned long)__builtin_return_address(2))
41 # define CALLER_ADDR3 ((unsigned long)__builtin_return_address(3))
42 # define CALLER_ADDR4 ((unsigned long)__builtin_return_address(4))
43 # define CALLER_ADDR5 ((unsigned long)__builtin_return_address(5))
45 # define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0))
46 # define CALLER_ADDR1 0UL
47 # define CALLER_ADDR2 0UL
48 # define CALLER_ADDR3 0UL
49 # define CALLER_ADDR4 0UL
50 # define CALLER_ADDR5 0UL
53 #endif /* _LINUX_FTRACE_H */