1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
|
#ifndef _LINUX_FTRACE_H
#define _LINUX_FTRACE_H
#ifdef CONFIG_FTRACE
#include <linux/linkage.h>
extern int ftrace_enabled;
extern int
ftrace_enable_sysctl(struct ctl_table *table, int write,
struct file *filp, void __user *buffer, size_t *lenp,
loff_t *ppos);
typedef void (*ftrace_func_t)(unsigned long ip, unsigned long parent_ip);
struct ftrace_ops {
ftrace_func_t func;
struct ftrace_ops *next;
};
/*
* The ftrace_ops must be a static and should also
* be read_mostly. These functions do modify read_mostly variables
* so use them sparely. Never free an ftrace_op or modify the
* next pointer after it has been registered. Even after unregistering
* it, the next pointer may still be used internally.
*/
int register_ftrace_function(struct ftrace_ops *ops);
int unregister_ftrace_function(struct ftrace_ops *ops);
void clear_ftrace_function(void);
extern void ftrace_stub(unsigned long a0, unsigned long a1);
extern void mcount(void);
#else /* !CONFIG_FTRACE */
# define register_ftrace_function(ops) do { } while (0)
# define unregister_ftrace_function(ops) do { } while (0)
# define clear_ftrace_function(ops) do { } while (0)
#endif /* CONFIG_FTRACE */
#ifdef CONFIG_DYNAMIC_FTRACE
# define FTRACE_HASHBITS 10
# define FTRACE_HASHSIZE (1<<FTRACE_HASHBITS)
struct dyn_ftrace {
struct hlist_node node;
unsigned long ip;
};
/* defined in arch */
extern struct dyn_ftrace *
ftrace_alloc_shutdown_node(unsigned long ip);
extern int ftrace_shutdown_arch_init(void);
extern void ftrace_code_disable(struct dyn_ftrace *rec);
extern void ftrace_startup_code(void);
extern void ftrace_shutdown_code(void);
extern void ftrace_shutdown_replenish(void);
#endif
#ifdef CONFIG_FRAME_POINTER
/* TODO: need to fix this for ARM */
# define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0))
# define CALLER_ADDR1 ((unsigned long)__builtin_return_address(1))
# define CALLER_ADDR2 ((unsigned long)__builtin_return_address(2))
# define CALLER_ADDR3 ((unsigned long)__builtin_return_address(3))
# define CALLER_ADDR4 ((unsigned long)__builtin_return_address(4))
# define CALLER_ADDR5 ((unsigned long)__builtin_return_address(5))
#else
# define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0))
# define CALLER_ADDR1 0UL
# define CALLER_ADDR2 0UL
# define CALLER_ADDR3 0UL
# define CALLER_ADDR4 0UL
# define CALLER_ADDR5 0UL
#endif
#ifdef CONFIG_IRQSOFF_TRACER
extern void notrace time_hardirqs_on(unsigned long a0, unsigned long a1);
extern void notrace time_hardirqs_off(unsigned long a0, unsigned long a1);
#else
# define time_hardirqs_on(a0, a1) do { } while (0)
# define time_hardirqs_off(a0, a1) do { } while (0)
#endif
#ifdef CONFIG_PREEMPT_TRACER
extern void notrace trace_preempt_on(unsigned long a0, unsigned long a1);
extern void notrace trace_preempt_off(unsigned long a0, unsigned long a1);
#else
# define trace_preempt_on(a0, a1) do { } while (0)
# define trace_preempt_off(a0, a1) do { } while (0)
#endif
#endif /* _LINUX_FTRACE_H */
|
