projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | ||
| 57 | /* defined in arch */ | |
| 3c1720f0 SR |
58 | extern int ftrace_ip_converted(unsigned long ip); |
| 59 | extern unsigned char *ftrace_nop_replace(void); | |
| 60 | extern unsigned char *ftrace_call_replace(unsigned long ip, unsigned long addr); | |
| d61f82d0 SR |
61 | extern int ftrace_dyn_arch_init(void *data); |
| 62 | extern int ftrace_mcount_set(unsigned long *data); | |
| 3c1720f0 SR |
63 | extern int ftrace_modify_code(unsigned long ip, unsigned char *old_code, |
| 64 | unsigned char *new_code); | |
| d61f82d0 SR |
65 | extern int ftrace_update_ftrace_func(ftrace_func_t func); |
| 66 | extern void ftrace_caller(void); | |
| 67 | extern void ftrace_call(void); | |
| 68 | extern void mcount_call(void); | |
| 3d083395 | 69 | #endif |
| 352ad25a | 70 | |
| f43fdad8 IM |
71 | static inline void tracer_disable(void) |
| 72 | { | |
| 73 | #ifdef CONFIG_FTRACE | |
| 74 | ftrace_enabled = 0; | |
| 75 | #endif | |
| 76 | } | |
| 77 | ||
| 352ad25a SR |
78 | #ifdef CONFIG_FRAME_POINTER |
| 79 | /* TODO: need to fix this for ARM */ | |
| 80 | # define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0)) | |
| 81 | # define CALLER_ADDR1 ((unsigned long)__builtin_return_address(1)) | |
| 82 | # define CALLER_ADDR2 ((unsigned long)__builtin_return_address(2)) | |
| 83 | # define CALLER_ADDR3 ((unsigned long)__builtin_return_address(3)) | |
| 84 | # define CALLER_ADDR4 ((unsigned long)__builtin_return_address(4)) | |
| 85 | # define CALLER_ADDR5 ((unsigned long)__builtin_return_address(5)) | |
| 86 | #else | |
| 87 | # define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0)) | |
| 88 | # define CALLER_ADDR1 0UL | |
| 89 | # define CALLER_ADDR2 0UL | |
| 90 | # define CALLER_ADDR3 0UL | |
| 91 | # define CALLER_ADDR4 0UL | |
| 92 | # define CALLER_ADDR5 0UL | |
| 93 | #endif | |
| 94 | ||
| 81d68a96 SR |
95 | #ifdef CONFIG_IRQSOFF_TRACER |
| 96 | extern void notrace time_hardirqs_on(unsigned long a0, unsigned long a1); | |
| 97 | extern void notrace time_hardirqs_off(unsigned long a0, unsigned long a1); | |
| 98 | #else | |
| 99 | # define time_hardirqs_on(a0, a1) do { } while (0) | |
| 100 | # define time_hardirqs_off(a0, a1) do { } while (0) | |
| 101 | #endif | |
| 102 | ||
| 6cd8a4bb SR |
103 | #ifdef CONFIG_PREEMPT_TRACER |
| 104 | extern void notrace trace_preempt_on(unsigned long a0, unsigned long a1); | |
| 105 | extern void notrace trace_preempt_off(unsigned long a0, unsigned long a1); | |
| 106 | #else | |
| 107 | # define trace_preempt_on(a0, a1) do { } while (0) | |
| 108 | # define trace_preempt_off(a0, a1) do { } while (0) | |
| 109 | #endif | |
| 110 | ||
| 16444a8a | 111 | #endif /* _LINUX_FTRACE_H */ |