Commit | Line | Data |
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2da3e160 FW |
1 | #ifndef _LINUX_HW_BREAKPOINT_H |
2 | #define _LINUX_HW_BREAKPOINT_H | |
b332828c | 3 | |
24f1e32c FW |
4 | enum { |
5 | HW_BREAKPOINT_LEN_1 = 1, | |
6 | HW_BREAKPOINT_LEN_2 = 2, | |
7 | HW_BREAKPOINT_LEN_4 = 4, | |
8 | HW_BREAKPOINT_LEN_8 = 8, | |
b332828c P |
9 | }; |
10 | ||
24f1e32c FW |
11 | enum { |
12 | HW_BREAKPOINT_R = 1, | |
13 | HW_BREAKPOINT_W = 2, | |
14 | HW_BREAKPOINT_X = 4, | |
15 | }; | |
16 | ||
5093ebad | 17 | #ifdef __KERNEL__ |
688bcaff | 18 | |
e6db4876 FW |
19 | #include <linux/perf_event.h> |
20 | ||
fa7c27ee FW |
21 | #ifdef CONFIG_HAVE_HW_BREAKPOINT |
22 | ||
dd1853c3 FW |
23 | static inline void hw_breakpoint_init(struct perf_event_attr *attr) |
24 | { | |
25 | attr->type = PERF_TYPE_BREAKPOINT; | |
26 | attr->size = sizeof(*attr); | |
b326e956 FW |
27 | /* |
28 | * As it's for in-kernel or ptrace use, we want it to be pinned | |
29 | * and to call its callback every hits. | |
30 | */ | |
dd1853c3 | 31 | attr->pinned = 1; |
b326e956 | 32 | attr->sample_period = 1; |
dd1853c3 FW |
33 | } |
34 | ||
24f1e32c FW |
35 | static inline unsigned long hw_breakpoint_addr(struct perf_event *bp) |
36 | { | |
37 | return bp->attr.bp_addr; | |
38 | } | |
39 | ||
40 | static inline int hw_breakpoint_type(struct perf_event *bp) | |
41 | { | |
42 | return bp->attr.bp_type; | |
43 | } | |
44 | ||
45 | static inline int hw_breakpoint_len(struct perf_event *bp) | |
46 | { | |
47 | return bp->attr.bp_len; | |
48 | } | |
49 | ||
24f1e32c | 50 | extern struct perf_event * |
5fa10b28 | 51 | register_user_hw_breakpoint(struct perf_event_attr *attr, |
b326e956 | 52 | perf_overflow_handler_t triggered, |
5fa10b28 | 53 | struct task_struct *tsk); |
24f1e32c FW |
54 | |
55 | /* FIXME: only change from the attr, and don't unregister */ | |
56 | extern struct perf_event * | |
2f0993e0 | 57 | modify_user_hw_breakpoint(struct perf_event *bp, struct perf_event_attr *attr); |
b332828c | 58 | |
b332828c P |
59 | /* |
60 | * Kernel breakpoints are not associated with any particular thread. | |
61 | */ | |
24f1e32c | 62 | extern struct perf_event * |
dd1853c3 | 63 | register_wide_hw_breakpoint_cpu(struct perf_event_attr *attr, |
b326e956 | 64 | perf_overflow_handler_t triggered, |
dd1853c3 | 65 | int cpu); |
24f1e32c FW |
66 | |
67 | extern struct perf_event ** | |
dd1853c3 | 68 | register_wide_hw_breakpoint(struct perf_event_attr *attr, |
b326e956 | 69 | perf_overflow_handler_t triggered); |
24f1e32c FW |
70 | |
71 | extern int register_perf_hw_breakpoint(struct perf_event *bp); | |
72 | extern int __register_perf_hw_breakpoint(struct perf_event *bp); | |
73 | extern void unregister_hw_breakpoint(struct perf_event *bp); | |
74 | extern void unregister_wide_hw_breakpoint(struct perf_event **cpu_events); | |
75 | ||
76 | extern int reserve_bp_slot(struct perf_event *bp); | |
77 | extern void release_bp_slot(struct perf_event *bp); | |
78 | ||
79 | extern void flush_ptrace_hw_breakpoint(struct task_struct *tsk); | |
80 | ||
687b16fb FW |
81 | static inline struct arch_hw_breakpoint *counter_arch_bp(struct perf_event *bp) |
82 | { | |
83 | return &bp->hw.info; | |
84 | } | |
85 | ||
24f1e32c FW |
86 | #else /* !CONFIG_HAVE_HW_BREAKPOINT */ |
87 | ||
88 | static inline struct perf_event * | |
5fa10b28 | 89 | register_user_hw_breakpoint(struct perf_event_attr *attr, |
b326e956 | 90 | perf_overflow_handler_t triggered, |
5fa10b28 | 91 | struct task_struct *tsk) { return NULL; } |
24f1e32c FW |
92 | static inline struct perf_event * |
93 | modify_user_hw_breakpoint(struct perf_event *bp, | |
2f0993e0 | 94 | struct perf_event_attr *attr) { return NULL; } |
24f1e32c | 95 | static inline struct perf_event * |
dd1853c3 | 96 | register_wide_hw_breakpoint_cpu(struct perf_event_attr *attr, |
b326e956 | 97 | perf_overflow_handler_t triggered, |
dd1853c3 | 98 | int cpu) { return NULL; } |
24f1e32c | 99 | static inline struct perf_event ** |
dd1853c3 | 100 | register_wide_hw_breakpoint(struct perf_event_attr *attr, |
b326e956 | 101 | perf_overflow_handler_t triggered) { return NULL; } |
24f1e32c FW |
102 | static inline int |
103 | register_perf_hw_breakpoint(struct perf_event *bp) { return -ENOSYS; } | |
104 | static inline int | |
105 | __register_perf_hw_breakpoint(struct perf_event *bp) { return -ENOSYS; } | |
106 | static inline void unregister_hw_breakpoint(struct perf_event *bp) { } | |
107 | static inline void | |
108 | unregister_wide_hw_breakpoint(struct perf_event **cpu_events) { } | |
109 | static inline int | |
110 | reserve_bp_slot(struct perf_event *bp) {return -ENOSYS; } | |
111 | static inline void release_bp_slot(struct perf_event *bp) { } | |
112 | ||
113 | static inline void flush_ptrace_hw_breakpoint(struct task_struct *tsk) { } | |
b332828c | 114 | |
687b16fb FW |
115 | static inline struct arch_hw_breakpoint *counter_arch_bp(struct perf_event *bp) |
116 | { | |
117 | return NULL; | |
118 | } | |
119 | ||
24f1e32c | 120 | #endif /* CONFIG_HAVE_HW_BREAKPOINT */ |
5093ebad | 121 | #endif /* __KERNEL__ */ |
b332828c | 122 | |
24f1e32c | 123 | #endif /* _LINUX_HW_BREAKPOINT_H */ |