Commit | Line | Data |
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16444a8a ACM |
1 | #ifndef _LINUX_FTRACE_H |
2 | #define _LINUX_FTRACE_H | |
3 | ||
4 | #ifdef CONFIG_FTRACE | |
5 | ||
6 | #include <linux/linkage.h> | |
d49dbf33 | 7 | #include <linux/fs.h> |
16444a8a | 8 | |
b0fc494f SR |
9 | extern int ftrace_enabled; |
10 | extern int | |
11 | ftrace_enable_sysctl(struct ctl_table *table, int write, | |
12 | struct file *filp, void __user *buffer, size_t *lenp, | |
13 | loff_t *ppos); | |
14 | ||
16444a8a ACM |
15 | typedef void (*ftrace_func_t)(unsigned long ip, unsigned long parent_ip); |
16 | ||
17 | struct ftrace_ops { | |
18 | ftrace_func_t func; | |
19 | struct ftrace_ops *next; | |
20 | }; | |
21 | ||
22 | /* | |
23 | * The ftrace_ops must be a static and should also | |
24 | * be read_mostly. These functions do modify read_mostly variables | |
25 | * so use them sparely. Never free an ftrace_op or modify the | |
26 | * next pointer after it has been registered. Even after unregistering | |
27 | * it, the next pointer may still be used internally. | |
28 | */ | |
29 | int register_ftrace_function(struct ftrace_ops *ops); | |
30 | int unregister_ftrace_function(struct ftrace_ops *ops); | |
31 | void clear_ftrace_function(void); | |
32 | ||
33 | extern void ftrace_stub(unsigned long a0, unsigned long a1); | |
34 | extern void mcount(void); | |
35 | ||
36 | #else /* !CONFIG_FTRACE */ | |
37 | # define register_ftrace_function(ops) do { } while (0) | |
38 | # define unregister_ftrace_function(ops) do { } while (0) | |
39 | # define clear_ftrace_function(ops) do { } while (0) | |
40 | #endif /* CONFIG_FTRACE */ | |
352ad25a | 41 | |
3d083395 SR |
42 | #ifdef CONFIG_DYNAMIC_FTRACE |
43 | # define FTRACE_HASHBITS 10 | |
44 | # define FTRACE_HASHSIZE (1<<FTRACE_HASHBITS) | |
45 | ||
3c1720f0 | 46 | enum { |
37ad5084 SR |
47 | FTRACE_FL_FREE = (1 << 0), |
48 | FTRACE_FL_FAILED = (1 << 1), | |
49 | FTRACE_FL_FILTER = (1 << 2), | |
50 | FTRACE_FL_ENABLED = (1 << 3), | |
3c1720f0 SR |
51 | }; |
52 | ||
3d083395 SR |
53 | struct dyn_ftrace { |
54 | struct hlist_node node; | |
55 | unsigned long ip; | |
3c1720f0 | 56 | unsigned long flags; |
3d083395 SR |
57 | }; |
58 | ||
e1c08bdd | 59 | int ftrace_force_update(void); |
77a2b37d | 60 | void ftrace_set_filter(unsigned char *buf, int len, int reset); |
e1c08bdd | 61 | |
3d083395 | 62 | /* defined in arch */ |
3c1720f0 SR |
63 | extern int ftrace_ip_converted(unsigned long ip); |
64 | extern unsigned char *ftrace_nop_replace(void); | |
65 | extern unsigned char *ftrace_call_replace(unsigned long ip, unsigned long addr); | |
d61f82d0 SR |
66 | extern int ftrace_dyn_arch_init(void *data); |
67 | extern int ftrace_mcount_set(unsigned long *data); | |
3c1720f0 SR |
68 | extern int ftrace_modify_code(unsigned long ip, unsigned char *old_code, |
69 | unsigned char *new_code); | |
d61f82d0 SR |
70 | extern int ftrace_update_ftrace_func(ftrace_func_t func); |
71 | extern void ftrace_caller(void); | |
72 | extern void ftrace_call(void); | |
73 | extern void mcount_call(void); | |
e1c08bdd | 74 | #else |
aeaee8a2 IM |
75 | # define ftrace_force_update() ({ 0; }) |
76 | # define ftrace_set_filter(buf, len, reset) do { } while (0) | |
3d083395 | 77 | #endif |
352ad25a | 78 | |
aeaee8a2 IM |
79 | /* totally disable ftrace - can not re-enable after this */ |
80 | void ftrace_kill(void); | |
81 | ||
f43fdad8 IM |
82 | static inline void tracer_disable(void) |
83 | { | |
84 | #ifdef CONFIG_FTRACE | |
85 | ftrace_enabled = 0; | |
86 | #endif | |
87 | } | |
88 | ||
352ad25a SR |
89 | #ifdef CONFIG_FRAME_POINTER |
90 | /* TODO: need to fix this for ARM */ | |
91 | # define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0)) | |
92 | # define CALLER_ADDR1 ((unsigned long)__builtin_return_address(1)) | |
93 | # define CALLER_ADDR2 ((unsigned long)__builtin_return_address(2)) | |
94 | # define CALLER_ADDR3 ((unsigned long)__builtin_return_address(3)) | |
95 | # define CALLER_ADDR4 ((unsigned long)__builtin_return_address(4)) | |
96 | # define CALLER_ADDR5 ((unsigned long)__builtin_return_address(5)) | |
86387f7e | 97 | # define CALLER_ADDR6 ((unsigned long)__builtin_return_address(6)) |
352ad25a SR |
98 | #else |
99 | # define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0)) | |
100 | # define CALLER_ADDR1 0UL | |
101 | # define CALLER_ADDR2 0UL | |
102 | # define CALLER_ADDR3 0UL | |
103 | # define CALLER_ADDR4 0UL | |
104 | # define CALLER_ADDR5 0UL | |
86387f7e | 105 | # define CALLER_ADDR6 0UL |
352ad25a SR |
106 | #endif |
107 | ||
81d68a96 SR |
108 | #ifdef CONFIG_IRQSOFF_TRACER |
109 | extern void notrace time_hardirqs_on(unsigned long a0, unsigned long a1); | |
110 | extern void notrace time_hardirqs_off(unsigned long a0, unsigned long a1); | |
111 | #else | |
112 | # define time_hardirqs_on(a0, a1) do { } while (0) | |
113 | # define time_hardirqs_off(a0, a1) do { } while (0) | |
114 | #endif | |
115 | ||
6cd8a4bb SR |
116 | #ifdef CONFIG_PREEMPT_TRACER |
117 | extern void notrace trace_preempt_on(unsigned long a0, unsigned long a1); | |
118 | extern void notrace trace_preempt_off(unsigned long a0, unsigned long a1); | |
119 | #else | |
120 | # define trace_preempt_on(a0, a1) do { } while (0) | |
121 | # define trace_preempt_off(a0, a1) do { } while (0) | |
122 | #endif | |
123 | ||
74f4e369 IM |
124 | #ifdef CONFIG_CONTEXT_SWITCH_TRACER |
125 | extern void | |
126 | ftrace_special(unsigned long arg1, unsigned long arg2, unsigned long arg3); | |
127 | #else | |
128 | static inline void | |
129 | ftrace_special(unsigned long arg1, unsigned long arg2, unsigned long arg3) { } | |
130 | #endif | |
131 | ||
16444a8a | 132 | #endif /* _LINUX_FTRACE_H */ |