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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> | |
7 | ||
b0fc494f SR |
8 | extern int ftrace_enabled; |
9 | extern int | |
10 | ftrace_enable_sysctl(struct ctl_table *table, int write, | |
11 | struct file *filp, void __user *buffer, size_t *lenp, | |
12 | loff_t *ppos); | |
13 | ||
16444a8a ACM |
14 | typedef void (*ftrace_func_t)(unsigned long ip, unsigned long parent_ip); |
15 | ||
16 | struct ftrace_ops { | |
17 | ftrace_func_t func; | |
18 | struct ftrace_ops *next; | |
19 | }; | |
20 | ||
21 | /* | |
22 | * The ftrace_ops must be a static and should also | |
23 | * be read_mostly. These functions do modify read_mostly variables | |
24 | * so use them sparely. Never free an ftrace_op or modify the | |
25 | * next pointer after it has been registered. Even after unregistering | |
26 | * it, the next pointer may still be used internally. | |
27 | */ | |
28 | int register_ftrace_function(struct ftrace_ops *ops); | |
29 | int unregister_ftrace_function(struct ftrace_ops *ops); | |
30 | void clear_ftrace_function(void); | |
31 | ||
32 | extern void ftrace_stub(unsigned long a0, unsigned long a1); | |
33 | extern void mcount(void); | |
34 | ||
35 | #else /* !CONFIG_FTRACE */ | |
36 | # define register_ftrace_function(ops) do { } while (0) | |
37 | # define unregister_ftrace_function(ops) do { } while (0) | |
38 | # define clear_ftrace_function(ops) do { } while (0) | |
39 | #endif /* CONFIG_FTRACE */ | |
352ad25a | 40 | |
3d083395 SR |
41 | #ifdef CONFIG_DYNAMIC_FTRACE |
42 | # define FTRACE_HASHBITS 10 | |
43 | # define FTRACE_HASHSIZE (1<<FTRACE_HASHBITS) | |
44 | ||
3c1720f0 | 45 | enum { |
5072c59f SR |
46 | FTRACE_FL_FAILED = (1 << 0), |
47 | FTRACE_FL_FILTER = (1 << 1), | |
48 | FTRACE_FL_ENABLED = (1 << 2), | |
3c1720f0 SR |
49 | }; |
50 | ||
3d083395 SR |
51 | struct dyn_ftrace { |
52 | struct hlist_node node; | |
53 | unsigned long ip; | |
3c1720f0 | 54 | unsigned long flags; |
3d083395 SR |
55 | }; |
56 | ||
e1c08bdd SR |
57 | int ftrace_force_update(void); |
58 | ||
3d083395 | 59 | /* defined in arch */ |
3c1720f0 SR |
60 | extern int ftrace_ip_converted(unsigned long ip); |
61 | extern unsigned char *ftrace_nop_replace(void); | |
62 | extern unsigned char *ftrace_call_replace(unsigned long ip, unsigned long addr); | |
d61f82d0 SR |
63 | extern int ftrace_dyn_arch_init(void *data); |
64 | extern int ftrace_mcount_set(unsigned long *data); | |
3c1720f0 SR |
65 | extern int ftrace_modify_code(unsigned long ip, unsigned char *old_code, |
66 | unsigned char *new_code); | |
d61f82d0 SR |
67 | extern int ftrace_update_ftrace_func(ftrace_func_t func); |
68 | extern void ftrace_caller(void); | |
69 | extern void ftrace_call(void); | |
70 | extern void mcount_call(void); | |
e1c08bdd | 71 | #else |
c7aafc54 | 72 | # define ftrace_force_update() ({ 0; }) |
3d083395 | 73 | #endif |
352ad25a | 74 | |
f43fdad8 IM |
75 | static inline void tracer_disable(void) |
76 | { | |
77 | #ifdef CONFIG_FTRACE | |
78 | ftrace_enabled = 0; | |
79 | #endif | |
80 | } | |
81 | ||
352ad25a SR |
82 | #ifdef CONFIG_FRAME_POINTER |
83 | /* TODO: need to fix this for ARM */ | |
84 | # define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0)) | |
85 | # define CALLER_ADDR1 ((unsigned long)__builtin_return_address(1)) | |
86 | # define CALLER_ADDR2 ((unsigned long)__builtin_return_address(2)) | |
87 | # define CALLER_ADDR3 ((unsigned long)__builtin_return_address(3)) | |
88 | # define CALLER_ADDR4 ((unsigned long)__builtin_return_address(4)) | |
89 | # define CALLER_ADDR5 ((unsigned long)__builtin_return_address(5)) | |
90 | #else | |
91 | # define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0)) | |
92 | # define CALLER_ADDR1 0UL | |
93 | # define CALLER_ADDR2 0UL | |
94 | # define CALLER_ADDR3 0UL | |
95 | # define CALLER_ADDR4 0UL | |
96 | # define CALLER_ADDR5 0UL | |
97 | #endif | |
98 | ||
81d68a96 SR |
99 | #ifdef CONFIG_IRQSOFF_TRACER |
100 | extern void notrace time_hardirqs_on(unsigned long a0, unsigned long a1); | |
101 | extern void notrace time_hardirqs_off(unsigned long a0, unsigned long a1); | |
102 | #else | |
103 | # define time_hardirqs_on(a0, a1) do { } while (0) | |
104 | # define time_hardirqs_off(a0, a1) do { } while (0) | |
105 | #endif | |
106 | ||
6cd8a4bb SR |
107 | #ifdef CONFIG_PREEMPT_TRACER |
108 | extern void notrace trace_preempt_on(unsigned long a0, unsigned long a1); | |
109 | extern void notrace trace_preempt_off(unsigned long a0, unsigned long a1); | |
110 | #else | |
111 | # define trace_preempt_on(a0, a1) do { } while (0) | |
112 | # define trace_preempt_off(a0, a1) do { } while (0) | |
113 | #endif | |
114 | ||
16444a8a | 115 | #endif /* _LINUX_FTRACE_H */ |