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); | |
16444a8a ACM |
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) | |
c5131ad6 | 39 | static inline void ftrace_kill_atomic(void) { } |
16444a8a | 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), | |
41c52c0d | 51 | FTRACE_FL_NOTRACE = (1 << 4), |
0eb96701 | 52 | FTRACE_FL_CONVERTED = (1 << 5), |
ecea656d | 53 | FTRACE_FL_FROZEN = (1 << 6), |
3c1720f0 SR |
54 | }; |
55 | ||
3d083395 SR |
56 | struct dyn_ftrace { |
57 | struct hlist_node node; | |
395a59d0 | 58 | unsigned long ip; /* address of mcount call-site */ |
3c1720f0 | 59 | unsigned long flags; |
3d083395 SR |
60 | }; |
61 | ||
e1c08bdd | 62 | int ftrace_force_update(void); |
77a2b37d | 63 | void ftrace_set_filter(unsigned char *buf, int len, int reset); |
e1c08bdd | 64 | |
3d083395 | 65 | /* defined in arch */ |
3c1720f0 SR |
66 | extern int ftrace_ip_converted(unsigned long ip); |
67 | extern unsigned char *ftrace_nop_replace(void); | |
68 | extern unsigned char *ftrace_call_replace(unsigned long ip, unsigned long addr); | |
d61f82d0 SR |
69 | extern int ftrace_dyn_arch_init(void *data); |
70 | extern int ftrace_mcount_set(unsigned long *data); | |
3c1720f0 SR |
71 | extern int ftrace_modify_code(unsigned long ip, unsigned char *old_code, |
72 | unsigned char *new_code); | |
d61f82d0 SR |
73 | extern int ftrace_update_ftrace_func(ftrace_func_t func); |
74 | extern void ftrace_caller(void); | |
75 | extern void ftrace_call(void); | |
76 | extern void mcount_call(void); | |
ad90c0e3 | 77 | |
ecea656d AS |
78 | extern int skip_trace(unsigned long ip); |
79 | ||
ad90c0e3 SR |
80 | void ftrace_disable_daemon(void); |
81 | void ftrace_enable_daemon(void); | |
82 | ||
e1c08bdd | 83 | #else |
ecea656d | 84 | # define skip_trace(ip) ({ 0; }) |
aeaee8a2 IM |
85 | # define ftrace_force_update() ({ 0; }) |
86 | # define ftrace_set_filter(buf, len, reset) do { } while (0) | |
ad90c0e3 SR |
87 | # define ftrace_disable_daemon() do { } while (0) |
88 | # define ftrace_enable_daemon() do { } while (0) | |
ecea656d | 89 | #endif /* CONFIG_DYNAMIC_FTRACE */ |
352ad25a | 90 | |
aeaee8a2 IM |
91 | /* totally disable ftrace - can not re-enable after this */ |
92 | void ftrace_kill(void); | |
a2bb6a3d | 93 | void ftrace_kill_atomic(void); |
aeaee8a2 | 94 | |
f43fdad8 IM |
95 | static inline void tracer_disable(void) |
96 | { | |
97 | #ifdef CONFIG_FTRACE | |
98 | ftrace_enabled = 0; | |
99 | #endif | |
100 | } | |
101 | ||
9bdeb7b5 HY |
102 | /* Ftrace disable/restore without lock. Some synchronization mechanism |
103 | * must be used to prevent ftrace_enabled to be changed between | |
104 | * disable/restore. */ | |
105 | static inline int __ftrace_enabled_save(void) | |
106 | { | |
107 | #ifdef CONFIG_FTRACE | |
108 | int saved_ftrace_enabled = ftrace_enabled; | |
109 | ftrace_enabled = 0; | |
110 | return saved_ftrace_enabled; | |
111 | #else | |
112 | return 0; | |
113 | #endif | |
114 | } | |
115 | ||
116 | static inline void __ftrace_enabled_restore(int enabled) | |
117 | { | |
118 | #ifdef CONFIG_FTRACE | |
119 | ftrace_enabled = enabled; | |
120 | #endif | |
121 | } | |
122 | ||
352ad25a SR |
123 | #ifdef CONFIG_FRAME_POINTER |
124 | /* TODO: need to fix this for ARM */ | |
125 | # define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0)) | |
126 | # define CALLER_ADDR1 ((unsigned long)__builtin_return_address(1)) | |
127 | # define CALLER_ADDR2 ((unsigned long)__builtin_return_address(2)) | |
128 | # define CALLER_ADDR3 ((unsigned long)__builtin_return_address(3)) | |
129 | # define CALLER_ADDR4 ((unsigned long)__builtin_return_address(4)) | |
130 | # define CALLER_ADDR5 ((unsigned long)__builtin_return_address(5)) | |
86387f7e | 131 | # define CALLER_ADDR6 ((unsigned long)__builtin_return_address(6)) |
352ad25a SR |
132 | #else |
133 | # define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0)) | |
134 | # define CALLER_ADDR1 0UL | |
135 | # define CALLER_ADDR2 0UL | |
136 | # define CALLER_ADDR3 0UL | |
137 | # define CALLER_ADDR4 0UL | |
138 | # define CALLER_ADDR5 0UL | |
86387f7e | 139 | # define CALLER_ADDR6 0UL |
352ad25a SR |
140 | #endif |
141 | ||
81d68a96 | 142 | #ifdef CONFIG_IRQSOFF_TRACER |
489f1396 IM |
143 | extern void time_hardirqs_on(unsigned long a0, unsigned long a1); |
144 | extern void time_hardirqs_off(unsigned long a0, unsigned long a1); | |
81d68a96 SR |
145 | #else |
146 | # define time_hardirqs_on(a0, a1) do { } while (0) | |
147 | # define time_hardirqs_off(a0, a1) do { } while (0) | |
148 | #endif | |
149 | ||
6cd8a4bb | 150 | #ifdef CONFIG_PREEMPT_TRACER |
489f1396 IM |
151 | extern void trace_preempt_on(unsigned long a0, unsigned long a1); |
152 | extern void trace_preempt_off(unsigned long a0, unsigned long a1); | |
6cd8a4bb SR |
153 | #else |
154 | # define trace_preempt_on(a0, a1) do { } while (0) | |
155 | # define trace_preempt_off(a0, a1) do { } while (0) | |
156 | #endif | |
157 | ||
b1829d27 | 158 | #ifdef CONFIG_TRACING |
74f4e369 IM |
159 | extern void |
160 | ftrace_special(unsigned long arg1, unsigned long arg2, unsigned long arg3); | |
2f2c99db SR |
161 | |
162 | /** | |
163 | * ftrace_printk - printf formatting in the ftrace buffer | |
164 | * @fmt: the printf format for printing | |
165 | * | |
166 | * Note: __ftrace_printk is an internal function for ftrace_printk and | |
167 | * the @ip is passed in via the ftrace_printk macro. | |
168 | * | |
169 | * This function allows a kernel developer to debug fast path sections | |
170 | * that printk is not appropriate for. By scattering in various | |
171 | * printk like tracing in the code, a developer can quickly see | |
172 | * where problems are occurring. | |
173 | * | |
174 | * This is intended as a debugging tool for the developer only. | |
175 | * Please refrain from leaving ftrace_printks scattered around in | |
176 | * your code. | |
177 | */ | |
178 | # define ftrace_printk(fmt...) __ftrace_printk(_THIS_IP_, fmt) | |
dd0e545f SR |
179 | extern int |
180 | __ftrace_printk(unsigned long ip, const char *fmt, ...) | |
181 | __attribute__ ((format (printf, 2, 3))); | |
3f5a54e3 | 182 | extern void ftrace_dump(void); |
74f4e369 IM |
183 | #else |
184 | static inline void | |
185 | ftrace_special(unsigned long arg1, unsigned long arg2, unsigned long arg3) { } | |
dd0e545f | 186 | static inline int |
7b928c23 IM |
187 | ftrace_printk(const char *fmt, ...) __attribute__ ((format (printf, 1, 0))); |
188 | ||
189 | static inline int | |
190 | ftrace_printk(const char *fmt, ...) | |
dd0e545f SR |
191 | { |
192 | return 0; | |
193 | } | |
3f5a54e3 | 194 | static inline void ftrace_dump(void) { } |
74f4e369 IM |
195 | #endif |
196 | ||
68bf21aa SR |
197 | #ifdef CONFIG_FTRACE_MCOUNT_RECORD |
198 | extern void ftrace_init(void); | |
90d595fe | 199 | extern void ftrace_init_module(unsigned long *start, unsigned long *end); |
fed1939c | 200 | extern void ftrace_release(void *start, unsigned long size); |
68bf21aa SR |
201 | #else |
202 | static inline void ftrace_init(void) { } | |
90d595fe SR |
203 | static inline void |
204 | ftrace_init_module(unsigned long *start, unsigned long *end) { } | |
fed1939c | 205 | static inline void ftrace_release(void *start, unsigned long size) { } |
68bf21aa SR |
206 | #endif |
207 | ||
dd0e545f | 208 | |
16444a8a | 209 | #endif /* _LINUX_FTRACE_H */ |