Commit | Line | Data |
---|---|---|
16444a8a ACM |
1 | #ifndef _LINUX_FTRACE_H |
2 | #define _LINUX_FTRACE_H | |
3 | ||
0012693a | 4 | #include <linux/trace_clock.h> |
5601020f | 5 | #include <linux/kallsyms.h> |
0012693a | 6 | #include <linux/linkage.h> |
ea4e2bc4 | 7 | #include <linux/bitops.h> |
0012693a FW |
8 | #include <linux/module.h> |
9 | #include <linux/ktime.h> | |
21a8c466 | 10 | #include <linux/sched.h> |
0012693a FW |
11 | #include <linux/types.h> |
12 | #include <linux/init.h> | |
13 | #include <linux/fs.h> | |
16444a8a | 14 | |
c79a61f5 UKK |
15 | #include <asm/ftrace.h> |
16 | ||
606576ce | 17 | #ifdef CONFIG_FUNCTION_TRACER |
3e1932ad | 18 | |
b0fc494f SR |
19 | extern int ftrace_enabled; |
20 | extern int | |
21 | ftrace_enable_sysctl(struct ctl_table *table, int write, | |
22 | struct file *filp, void __user *buffer, size_t *lenp, | |
23 | loff_t *ppos); | |
24 | ||
16444a8a ACM |
25 | typedef void (*ftrace_func_t)(unsigned long ip, unsigned long parent_ip); |
26 | ||
27 | struct ftrace_ops { | |
28 | ftrace_func_t func; | |
29 | struct ftrace_ops *next; | |
30 | }; | |
31 | ||
60a7ecf4 SR |
32 | extern int function_trace_stop; |
33 | ||
e7d3737e FW |
34 | /* |
35 | * Type of the current tracing. | |
36 | */ | |
37 | enum ftrace_tracing_type_t { | |
38 | FTRACE_TYPE_ENTER = 0, /* Hook the call of the function */ | |
39 | FTRACE_TYPE_RETURN, /* Hook the return of the function */ | |
40 | }; | |
41 | ||
42 | /* Current tracing type, default is FTRACE_TYPE_ENTER */ | |
43 | extern enum ftrace_tracing_type_t ftrace_tracing_type; | |
44 | ||
60a7ecf4 SR |
45 | /** |
46 | * ftrace_stop - stop function tracer. | |
47 | * | |
48 | * A quick way to stop the function tracer. Note this an on off switch, | |
49 | * it is not something that is recursive like preempt_disable. | |
50 | * This does not disable the calling of mcount, it only stops the | |
51 | * calling of functions from mcount. | |
52 | */ | |
53 | static inline void ftrace_stop(void) | |
54 | { | |
55 | function_trace_stop = 1; | |
56 | } | |
57 | ||
58 | /** | |
59 | * ftrace_start - start the function tracer. | |
60 | * | |
61 | * This function is the inverse of ftrace_stop. This does not enable | |
62 | * the function tracing if the function tracer is disabled. This only | |
63 | * sets the function tracer flag to continue calling the functions | |
64 | * from mcount. | |
65 | */ | |
66 | static inline void ftrace_start(void) | |
67 | { | |
68 | function_trace_stop = 0; | |
69 | } | |
70 | ||
16444a8a ACM |
71 | /* |
72 | * The ftrace_ops must be a static and should also | |
73 | * be read_mostly. These functions do modify read_mostly variables | |
74 | * so use them sparely. Never free an ftrace_op or modify the | |
75 | * next pointer after it has been registered. Even after unregistering | |
76 | * it, the next pointer may still be used internally. | |
77 | */ | |
78 | int register_ftrace_function(struct ftrace_ops *ops); | |
79 | int unregister_ftrace_function(struct ftrace_ops *ops); | |
80 | void clear_ftrace_function(void); | |
81 | ||
82 | extern void ftrace_stub(unsigned long a0, unsigned long a1); | |
16444a8a | 83 | |
606576ce | 84 | #else /* !CONFIG_FUNCTION_TRACER */ |
16444a8a ACM |
85 | # define register_ftrace_function(ops) do { } while (0) |
86 | # define unregister_ftrace_function(ops) do { } while (0) | |
87 | # define clear_ftrace_function(ops) do { } while (0) | |
81adbdc0 | 88 | static inline void ftrace_kill(void) { } |
60a7ecf4 SR |
89 | static inline void ftrace_stop(void) { } |
90 | static inline void ftrace_start(void) { } | |
606576ce | 91 | #endif /* CONFIG_FUNCTION_TRACER */ |
352ad25a | 92 | |
f38f1d2a SR |
93 | #ifdef CONFIG_STACK_TRACER |
94 | extern int stack_tracer_enabled; | |
95 | int | |
96 | stack_trace_sysctl(struct ctl_table *table, int write, | |
97 | struct file *file, void __user *buffer, size_t *lenp, | |
98 | loff_t *ppos); | |
99 | #endif | |
100 | ||
f6180773 SR |
101 | struct ftrace_func_command { |
102 | struct list_head list; | |
103 | char *name; | |
104 | int (*func)(char *func, char *cmd, | |
105 | char *params, int enable); | |
106 | }; | |
107 | ||
3d083395 | 108 | #ifdef CONFIG_DYNAMIC_FTRACE |
31e88909 | 109 | |
000ab691 SR |
110 | int ftrace_arch_code_modify_prepare(void); |
111 | int ftrace_arch_code_modify_post_process(void); | |
112 | ||
809dcf29 SR |
113 | struct seq_file; |
114 | ||
b6887d79 | 115 | struct ftrace_probe_ops { |
59df055f SR |
116 | void (*func)(unsigned long ip, |
117 | unsigned long parent_ip, | |
118 | void **data); | |
119 | int (*callback)(unsigned long ip, void **data); | |
120 | void (*free)(void **data); | |
809dcf29 SR |
121 | int (*print)(struct seq_file *m, |
122 | unsigned long ip, | |
b6887d79 | 123 | struct ftrace_probe_ops *ops, |
809dcf29 | 124 | void *data); |
59df055f SR |
125 | }; |
126 | ||
127 | extern int | |
b6887d79 | 128 | register_ftrace_function_probe(char *glob, struct ftrace_probe_ops *ops, |
59df055f SR |
129 | void *data); |
130 | extern void | |
b6887d79 | 131 | unregister_ftrace_function_probe(char *glob, struct ftrace_probe_ops *ops, |
59df055f SR |
132 | void *data); |
133 | extern void | |
b6887d79 SR |
134 | unregister_ftrace_function_probe_func(char *glob, struct ftrace_probe_ops *ops); |
135 | extern void unregister_ftrace_function_probe_all(char *glob); | |
59df055f | 136 | |
3c1720f0 | 137 | enum { |
37ad5084 SR |
138 | FTRACE_FL_FREE = (1 << 0), |
139 | FTRACE_FL_FAILED = (1 << 1), | |
140 | FTRACE_FL_FILTER = (1 << 2), | |
141 | FTRACE_FL_ENABLED = (1 << 3), | |
41c52c0d | 142 | FTRACE_FL_NOTRACE = (1 << 4), |
0eb96701 | 143 | FTRACE_FL_CONVERTED = (1 << 5), |
ecea656d | 144 | FTRACE_FL_FROZEN = (1 << 6), |
3c1720f0 SR |
145 | }; |
146 | ||
3d083395 | 147 | struct dyn_ftrace { |
08f5ac90 SR |
148 | unsigned long ip; /* address of mcount call-site */ |
149 | unsigned long flags; | |
31e88909 | 150 | struct dyn_arch_ftrace arch; |
3d083395 SR |
151 | }; |
152 | ||
e1c08bdd | 153 | int ftrace_force_update(void); |
77a2b37d | 154 | void ftrace_set_filter(unsigned char *buf, int len, int reset); |
e1c08bdd | 155 | |
f6180773 SR |
156 | int register_ftrace_command(struct ftrace_func_command *cmd); |
157 | int unregister_ftrace_command(struct ftrace_func_command *cmd); | |
158 | ||
3d083395 | 159 | /* defined in arch */ |
3c1720f0 | 160 | extern int ftrace_ip_converted(unsigned long ip); |
d61f82d0 | 161 | extern int ftrace_dyn_arch_init(void *data); |
d61f82d0 SR |
162 | extern int ftrace_update_ftrace_func(ftrace_func_t func); |
163 | extern void ftrace_caller(void); | |
164 | extern void ftrace_call(void); | |
165 | extern void mcount_call(void); | |
f0001207 SL |
166 | |
167 | #ifndef FTRACE_ADDR | |
168 | #define FTRACE_ADDR ((unsigned long)ftrace_caller) | |
169 | #endif | |
fb52607a FW |
170 | #ifdef CONFIG_FUNCTION_GRAPH_TRACER |
171 | extern void ftrace_graph_caller(void); | |
5a45cfe1 SR |
172 | extern int ftrace_enable_ftrace_graph_caller(void); |
173 | extern int ftrace_disable_ftrace_graph_caller(void); | |
174 | #else | |
175 | static inline int ftrace_enable_ftrace_graph_caller(void) { return 0; } | |
176 | static inline int ftrace_disable_ftrace_graph_caller(void) { return 0; } | |
e7d3737e | 177 | #endif |
ad90c0e3 | 178 | |
31e88909 | 179 | /** |
57794a9d | 180 | * ftrace_make_nop - convert code into nop |
31e88909 SR |
181 | * @mod: module structure if called by module load initialization |
182 | * @rec: the mcount call site record | |
183 | * @addr: the address that the call site should be calling | |
184 | * | |
185 | * This is a very sensitive operation and great care needs | |
186 | * to be taken by the arch. The operation should carefully | |
187 | * read the location, check to see if what is read is indeed | |
188 | * what we expect it to be, and then on success of the compare, | |
189 | * it should write to the location. | |
190 | * | |
191 | * The code segment at @rec->ip should be a caller to @addr | |
192 | * | |
193 | * Return must be: | |
194 | * 0 on success | |
195 | * -EFAULT on error reading the location | |
196 | * -EINVAL on a failed compare of the contents | |
197 | * -EPERM on error writing to the location | |
198 | * Any other value will be considered a failure. | |
199 | */ | |
200 | extern int ftrace_make_nop(struct module *mod, | |
201 | struct dyn_ftrace *rec, unsigned long addr); | |
a26a2a27 | 202 | |
593eb8a2 | 203 | /** |
31e88909 SR |
204 | * ftrace_make_call - convert a nop call site into a call to addr |
205 | * @rec: the mcount call site record | |
206 | * @addr: the address that the call site should call | |
593eb8a2 SR |
207 | * |
208 | * This is a very sensitive operation and great care needs | |
209 | * to be taken by the arch. The operation should carefully | |
210 | * read the location, check to see if what is read is indeed | |
211 | * what we expect it to be, and then on success of the compare, | |
212 | * it should write to the location. | |
213 | * | |
31e88909 SR |
214 | * The code segment at @rec->ip should be a nop |
215 | * | |
593eb8a2 SR |
216 | * Return must be: |
217 | * 0 on success | |
218 | * -EFAULT on error reading the location | |
219 | * -EINVAL on a failed compare of the contents | |
220 | * -EPERM on error writing to the location | |
221 | * Any other value will be considered a failure. | |
222 | */ | |
31e88909 SR |
223 | extern int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr); |
224 | ||
31e88909 SR |
225 | /* May be defined in arch */ |
226 | extern int ftrace_arch_read_dyn_info(char *buf, int size); | |
593eb8a2 | 227 | |
ecea656d AS |
228 | extern int skip_trace(unsigned long ip); |
229 | ||
c0719e5a SR |
230 | extern void ftrace_release(void *start, unsigned long size); |
231 | ||
232 | extern void ftrace_disable_daemon(void); | |
233 | extern void ftrace_enable_daemon(void); | |
e1c08bdd | 234 | #else |
ecea656d | 235 | # define skip_trace(ip) ({ 0; }) |
aeaee8a2 IM |
236 | # define ftrace_force_update() ({ 0; }) |
237 | # define ftrace_set_filter(buf, len, reset) do { } while (0) | |
ad90c0e3 SR |
238 | # define ftrace_disable_daemon() do { } while (0) |
239 | # define ftrace_enable_daemon() do { } while (0) | |
c0719e5a | 240 | static inline void ftrace_release(void *start, unsigned long size) { } |
f6180773 SR |
241 | static inline int register_ftrace_command(struct ftrace_func_command *cmd) |
242 | { | |
97d0bb8d | 243 | return -EINVAL; |
f6180773 SR |
244 | } |
245 | static inline int unregister_ftrace_command(char *cmd_name) | |
246 | { | |
97d0bb8d | 247 | return -EINVAL; |
f6180773 | 248 | } |
ecea656d | 249 | #endif /* CONFIG_DYNAMIC_FTRACE */ |
352ad25a | 250 | |
aeaee8a2 IM |
251 | /* totally disable ftrace - can not re-enable after this */ |
252 | void ftrace_kill(void); | |
253 | ||
f43fdad8 IM |
254 | static inline void tracer_disable(void) |
255 | { | |
606576ce | 256 | #ifdef CONFIG_FUNCTION_TRACER |
f43fdad8 IM |
257 | ftrace_enabled = 0; |
258 | #endif | |
259 | } | |
260 | ||
37002735 HY |
261 | /* |
262 | * Ftrace disable/restore without lock. Some synchronization mechanism | |
9bdeb7b5 | 263 | * must be used to prevent ftrace_enabled to be changed between |
37002735 HY |
264 | * disable/restore. |
265 | */ | |
9bdeb7b5 HY |
266 | static inline int __ftrace_enabled_save(void) |
267 | { | |
606576ce | 268 | #ifdef CONFIG_FUNCTION_TRACER |
9bdeb7b5 HY |
269 | int saved_ftrace_enabled = ftrace_enabled; |
270 | ftrace_enabled = 0; | |
271 | return saved_ftrace_enabled; | |
272 | #else | |
273 | return 0; | |
274 | #endif | |
275 | } | |
276 | ||
277 | static inline void __ftrace_enabled_restore(int enabled) | |
278 | { | |
606576ce | 279 | #ifdef CONFIG_FUNCTION_TRACER |
9bdeb7b5 HY |
280 | ftrace_enabled = enabled; |
281 | #endif | |
282 | } | |
283 | ||
c79a61f5 UKK |
284 | #ifndef HAVE_ARCH_CALLER_ADDR |
285 | # ifdef CONFIG_FRAME_POINTER | |
286 | # define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0)) | |
287 | # define CALLER_ADDR1 ((unsigned long)__builtin_return_address(1)) | |
288 | # define CALLER_ADDR2 ((unsigned long)__builtin_return_address(2)) | |
289 | # define CALLER_ADDR3 ((unsigned long)__builtin_return_address(3)) | |
290 | # define CALLER_ADDR4 ((unsigned long)__builtin_return_address(4)) | |
291 | # define CALLER_ADDR5 ((unsigned long)__builtin_return_address(5)) | |
292 | # define CALLER_ADDR6 ((unsigned long)__builtin_return_address(6)) | |
293 | # else | |
294 | # define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0)) | |
295 | # define CALLER_ADDR1 0UL | |
296 | # define CALLER_ADDR2 0UL | |
297 | # define CALLER_ADDR3 0UL | |
298 | # define CALLER_ADDR4 0UL | |
299 | # define CALLER_ADDR5 0UL | |
300 | # define CALLER_ADDR6 0UL | |
301 | # endif | |
302 | #endif /* ifndef HAVE_ARCH_CALLER_ADDR */ | |
352ad25a | 303 | |
81d68a96 | 304 | #ifdef CONFIG_IRQSOFF_TRACER |
489f1396 IM |
305 | extern void time_hardirqs_on(unsigned long a0, unsigned long a1); |
306 | extern void time_hardirqs_off(unsigned long a0, unsigned long a1); | |
81d68a96 SR |
307 | #else |
308 | # define time_hardirqs_on(a0, a1) do { } while (0) | |
309 | # define time_hardirqs_off(a0, a1) do { } while (0) | |
310 | #endif | |
311 | ||
6cd8a4bb | 312 | #ifdef CONFIG_PREEMPT_TRACER |
489f1396 IM |
313 | extern void trace_preempt_on(unsigned long a0, unsigned long a1); |
314 | extern void trace_preempt_off(unsigned long a0, unsigned long a1); | |
6cd8a4bb SR |
315 | #else |
316 | # define trace_preempt_on(a0, a1) do { } while (0) | |
317 | # define trace_preempt_off(a0, a1) do { } while (0) | |
318 | #endif | |
319 | ||
68bf21aa SR |
320 | #ifdef CONFIG_FTRACE_MCOUNT_RECORD |
321 | extern void ftrace_init(void); | |
31e88909 SR |
322 | extern void ftrace_init_module(struct module *mod, |
323 | unsigned long *start, unsigned long *end); | |
68bf21aa SR |
324 | #else |
325 | static inline void ftrace_init(void) { } | |
90d595fe | 326 | static inline void |
31e88909 SR |
327 | ftrace_init_module(struct module *mod, |
328 | unsigned long *start, unsigned long *end) { } | |
68bf21aa SR |
329 | #endif |
330 | ||
287b6e68 FW |
331 | /* |
332 | * Structure that defines an entry function trace. | |
333 | */ | |
334 | struct ftrace_graph_ent { | |
335 | unsigned long func; /* Current function */ | |
336 | int depth; | |
337 | }; | |
dd0e545f | 338 | |
caf4b323 FW |
339 | /* |
340 | * Structure that defines a return function trace. | |
341 | */ | |
fb52607a | 342 | struct ftrace_graph_ret { |
caf4b323 FW |
343 | unsigned long func; /* Current function */ |
344 | unsigned long long calltime; | |
345 | unsigned long long rettime; | |
0231022c FW |
346 | /* Number of functions that overran the depth limit for current task */ |
347 | unsigned long overrun; | |
287b6e68 | 348 | int depth; |
caf4b323 FW |
349 | }; |
350 | ||
fb52607a | 351 | #ifdef CONFIG_FUNCTION_GRAPH_TRACER |
8b96f011 | 352 | |
712406a6 SR |
353 | /* |
354 | * Stack of return addresses for functions | |
355 | * of a thread. | |
356 | * Used in struct thread_info | |
357 | */ | |
358 | struct ftrace_ret_stack { | |
359 | unsigned long ret; | |
360 | unsigned long func; | |
361 | unsigned long long calltime; | |
362 | }; | |
363 | ||
364 | /* | |
365 | * Primary handler of a function return. | |
366 | * It relays on ftrace_return_to_handler. | |
367 | * Defined in entry_32/64.S | |
368 | */ | |
369 | extern void return_to_handler(void); | |
370 | ||
371 | extern int | |
5d1a03dc | 372 | ftrace_push_return_trace(unsigned long ret, unsigned long func, int *depth); |
712406a6 SR |
373 | extern void |
374 | ftrace_pop_return_trace(struct ftrace_graph_ret *trace, unsigned long *ret); | |
375 | ||
8b96f011 FW |
376 | /* |
377 | * Sometimes we don't want to trace a function with the function | |
378 | * graph tracer but we want them to keep traced by the usual function | |
379 | * tracer if the function graph tracer is not configured. | |
380 | */ | |
381 | #define __notrace_funcgraph notrace | |
382 | ||
bcbc4f20 FW |
383 | /* |
384 | * We want to which function is an entrypoint of a hardirq. | |
385 | * That will help us to put a signal on output. | |
386 | */ | |
387 | #define __irq_entry __attribute__((__section__(".irqentry.text"))) | |
388 | ||
389 | /* Limits of hardirq entrypoints */ | |
390 | extern char __irqentry_text_start[]; | |
391 | extern char __irqentry_text_end[]; | |
392 | ||
f201ae23 FW |
393 | #define FTRACE_RETFUNC_DEPTH 50 |
394 | #define FTRACE_RETSTACK_ALLOC_SIZE 32 | |
287b6e68 FW |
395 | /* Type of the callback handlers for tracing function graph*/ |
396 | typedef void (*trace_func_graph_ret_t)(struct ftrace_graph_ret *); /* return */ | |
e49dc19c | 397 | typedef int (*trace_func_graph_ent_t)(struct ftrace_graph_ent *); /* entry */ |
287b6e68 FW |
398 | |
399 | extern int register_ftrace_graph(trace_func_graph_ret_t retfunc, | |
400 | trace_func_graph_ent_t entryfunc); | |
401 | ||
14a866c5 SR |
402 | extern void ftrace_graph_stop(void); |
403 | ||
287b6e68 FW |
404 | /* The current handlers in use */ |
405 | extern trace_func_graph_ret_t ftrace_graph_return; | |
406 | extern trace_func_graph_ent_t ftrace_graph_entry; | |
caf4b323 | 407 | |
fb52607a | 408 | extern void unregister_ftrace_graph(void); |
f201ae23 | 409 | |
fb52607a FW |
410 | extern void ftrace_graph_init_task(struct task_struct *t); |
411 | extern void ftrace_graph_exit_task(struct task_struct *t); | |
21a8c466 FW |
412 | |
413 | static inline int task_curr_ret_stack(struct task_struct *t) | |
414 | { | |
415 | return t->curr_ret_stack; | |
416 | } | |
380c4b14 FW |
417 | |
418 | static inline void pause_graph_tracing(void) | |
419 | { | |
420 | atomic_inc(¤t->tracing_graph_pause); | |
421 | } | |
422 | ||
423 | static inline void unpause_graph_tracing(void) | |
424 | { | |
425 | atomic_dec(¤t->tracing_graph_pause); | |
426 | } | |
82f60f0b | 427 | #else |
8b96f011 FW |
428 | |
429 | #define __notrace_funcgraph | |
bcbc4f20 | 430 | #define __irq_entry |
8b96f011 | 431 | |
fb52607a FW |
432 | static inline void ftrace_graph_init_task(struct task_struct *t) { } |
433 | static inline void ftrace_graph_exit_task(struct task_struct *t) { } | |
21a8c466 FW |
434 | |
435 | static inline int task_curr_ret_stack(struct task_struct *tsk) | |
436 | { | |
437 | return -1; | |
438 | } | |
380c4b14 FW |
439 | |
440 | static inline void pause_graph_tracing(void) { } | |
441 | static inline void unpause_graph_tracing(void) { } | |
caf4b323 FW |
442 | #endif |
443 | ||
ea4e2bc4 SR |
444 | #ifdef CONFIG_TRACING |
445 | #include <linux/sched.h> | |
446 | ||
447 | /* flags for current->trace */ | |
448 | enum { | |
449 | TSK_TRACE_FL_TRACE_BIT = 0, | |
450 | TSK_TRACE_FL_GRAPH_BIT = 1, | |
451 | }; | |
452 | enum { | |
453 | TSK_TRACE_FL_TRACE = 1 << TSK_TRACE_FL_TRACE_BIT, | |
454 | TSK_TRACE_FL_GRAPH = 1 << TSK_TRACE_FL_GRAPH_BIT, | |
455 | }; | |
456 | ||
457 | static inline void set_tsk_trace_trace(struct task_struct *tsk) | |
458 | { | |
459 | set_bit(TSK_TRACE_FL_TRACE_BIT, &tsk->trace); | |
460 | } | |
461 | ||
462 | static inline void clear_tsk_trace_trace(struct task_struct *tsk) | |
463 | { | |
464 | clear_bit(TSK_TRACE_FL_TRACE_BIT, &tsk->trace); | |
465 | } | |
466 | ||
467 | static inline int test_tsk_trace_trace(struct task_struct *tsk) | |
468 | { | |
469 | return tsk->trace & TSK_TRACE_FL_TRACE; | |
470 | } | |
471 | ||
472 | static inline void set_tsk_trace_graph(struct task_struct *tsk) | |
473 | { | |
474 | set_bit(TSK_TRACE_FL_GRAPH_BIT, &tsk->trace); | |
475 | } | |
476 | ||
477 | static inline void clear_tsk_trace_graph(struct task_struct *tsk) | |
478 | { | |
479 | clear_bit(TSK_TRACE_FL_GRAPH_BIT, &tsk->trace); | |
480 | } | |
481 | ||
482 | static inline int test_tsk_trace_graph(struct task_struct *tsk) | |
483 | { | |
484 | return tsk->trace & TSK_TRACE_FL_GRAPH; | |
485 | } | |
486 | ||
526211bc IM |
487 | extern int ftrace_dump_on_oops; |
488 | ||
ea4e2bc4 SR |
489 | #endif /* CONFIG_TRACING */ |
490 | ||
b1818748 MM |
491 | |
492 | #ifdef CONFIG_HW_BRANCH_TRACER | |
493 | ||
494 | void trace_hw_branch(u64 from, u64 to); | |
495 | void trace_hw_branch_oops(void); | |
496 | ||
497 | #else /* CONFIG_HW_BRANCH_TRACER */ | |
498 | ||
499 | static inline void trace_hw_branch(u64 from, u64 to) {} | |
500 | static inline void trace_hw_branch_oops(void) {} | |
501 | ||
502 | #endif /* CONFIG_HW_BRANCH_TRACER */ | |
503 | ||
ee08c6ec FW |
504 | /* |
505 | * A syscall entry in the ftrace syscalls array. | |
506 | * | |
bed1ffca FW |
507 | * @name: name of the syscall |
508 | * @nb_args: number of parameters it takes | |
509 | * @types: list of types as strings | |
510 | * @args: list of args as strings (args[i] matches types[i]) | |
ee08c6ec | 511 | */ |
bed1ffca FW |
512 | struct syscall_metadata { |
513 | const char *name; | |
514 | int nb_args; | |
515 | const char **types; | |
516 | const char **args; | |
ee08c6ec FW |
517 | }; |
518 | ||
519 | #ifdef CONFIG_FTRACE_SYSCALLS | |
bed1ffca FW |
520 | extern void arch_init_ftrace_syscalls(void); |
521 | extern struct syscall_metadata *syscall_nr_to_meta(int nr); | |
ee08c6ec FW |
522 | extern void start_ftrace_syscalls(void); |
523 | extern void stop_ftrace_syscalls(void); | |
524 | extern void ftrace_syscall_enter(struct pt_regs *regs); | |
525 | extern void ftrace_syscall_exit(struct pt_regs *regs); | |
526 | #else | |
527 | static inline void start_ftrace_syscalls(void) { } | |
528 | static inline void stop_ftrace_syscalls(void) { } | |
529 | static inline void ftrace_syscall_enter(struct pt_regs *regs) { } | |
530 | static inline void ftrace_syscall_exit(struct pt_regs *regs) { } | |
531 | #endif | |
532 | ||
16444a8a | 533 | #endif /* _LINUX_FTRACE_H */ |