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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 | ||
5fa10b28 FW |
23 | /* As it's for in-kernel or ptrace use, we want it to be pinned */ |
24 | #define DEFINE_BREAKPOINT_ATTR(name) \ | |
25 | struct perf_event_attr name = { \ | |
26 | .type = PERF_TYPE_BREAKPOINT, \ | |
27 | .size = sizeof(name), \ | |
28 | .pinned = 1, \ | |
29 | }; | |
30 | ||
dd1853c3 FW |
31 | static inline void hw_breakpoint_init(struct perf_event_attr *attr) |
32 | { | |
33 | attr->type = PERF_TYPE_BREAKPOINT; | |
34 | attr->size = sizeof(*attr); | |
35 | attr->pinned = 1; | |
36 | } | |
37 | ||
24f1e32c FW |
38 | static inline unsigned long hw_breakpoint_addr(struct perf_event *bp) |
39 | { | |
40 | return bp->attr.bp_addr; | |
41 | } | |
42 | ||
43 | static inline int hw_breakpoint_type(struct perf_event *bp) | |
44 | { | |
45 | return bp->attr.bp_type; | |
46 | } | |
47 | ||
48 | static inline int hw_breakpoint_len(struct perf_event *bp) | |
49 | { | |
50 | return bp->attr.bp_len; | |
51 | } | |
52 | ||
24f1e32c | 53 | extern struct perf_event * |
5fa10b28 | 54 | register_user_hw_breakpoint(struct perf_event_attr *attr, |
24f1e32c | 55 | perf_callback_t triggered, |
5fa10b28 | 56 | struct task_struct *tsk); |
24f1e32c FW |
57 | |
58 | /* FIXME: only change from the attr, and don't unregister */ | |
59 | extern struct perf_event * | |
60 | modify_user_hw_breakpoint(struct perf_event *bp, | |
5fa10b28 | 61 | struct perf_event_attr *attr, |
24f1e32c | 62 | perf_callback_t triggered, |
5fa10b28 | 63 | struct task_struct *tsk); |
b332828c | 64 | |
b332828c P |
65 | /* |
66 | * Kernel breakpoints are not associated with any particular thread. | |
67 | */ | |
24f1e32c | 68 | extern struct perf_event * |
dd1853c3 | 69 | register_wide_hw_breakpoint_cpu(struct perf_event_attr *attr, |
24f1e32c | 70 | perf_callback_t triggered, |
dd1853c3 | 71 | int cpu); |
24f1e32c FW |
72 | |
73 | extern struct perf_event ** | |
dd1853c3 FW |
74 | register_wide_hw_breakpoint(struct perf_event_attr *attr, |
75 | perf_callback_t triggered); | |
24f1e32c FW |
76 | |
77 | extern int register_perf_hw_breakpoint(struct perf_event *bp); | |
78 | extern int __register_perf_hw_breakpoint(struct perf_event *bp); | |
79 | extern void unregister_hw_breakpoint(struct perf_event *bp); | |
80 | extern void unregister_wide_hw_breakpoint(struct perf_event **cpu_events); | |
81 | ||
82 | extern int reserve_bp_slot(struct perf_event *bp); | |
83 | extern void release_bp_slot(struct perf_event *bp); | |
84 | ||
85 | extern void flush_ptrace_hw_breakpoint(struct task_struct *tsk); | |
86 | ||
687b16fb FW |
87 | static inline struct arch_hw_breakpoint *counter_arch_bp(struct perf_event *bp) |
88 | { | |
89 | return &bp->hw.info; | |
90 | } | |
91 | ||
24f1e32c FW |
92 | #else /* !CONFIG_HAVE_HW_BREAKPOINT */ |
93 | ||
94 | static inline struct perf_event * | |
5fa10b28 | 95 | register_user_hw_breakpoint(struct perf_event_attr *attr, |
24f1e32c | 96 | perf_callback_t triggered, |
5fa10b28 | 97 | struct task_struct *tsk) { return NULL; } |
24f1e32c FW |
98 | static inline struct perf_event * |
99 | modify_user_hw_breakpoint(struct perf_event *bp, | |
5fa10b28 | 100 | struct perf_event_attr *attr, |
24f1e32c | 101 | perf_callback_t triggered, |
5fa10b28 | 102 | struct task_struct *tsk) { return NULL; } |
24f1e32c | 103 | static inline struct perf_event * |
dd1853c3 | 104 | register_wide_hw_breakpoint_cpu(struct perf_event_attr *attr, |
24f1e32c | 105 | perf_callback_t triggered, |
dd1853c3 | 106 | int cpu) { return NULL; } |
24f1e32c | 107 | static inline struct perf_event ** |
dd1853c3 FW |
108 | register_wide_hw_breakpoint(struct perf_event_attr *attr, |
109 | perf_callback_t triggered) { return NULL; } | |
24f1e32c FW |
110 | static inline int |
111 | register_perf_hw_breakpoint(struct perf_event *bp) { return -ENOSYS; } | |
112 | static inline int | |
113 | __register_perf_hw_breakpoint(struct perf_event *bp) { return -ENOSYS; } | |
114 | static inline void unregister_hw_breakpoint(struct perf_event *bp) { } | |
115 | static inline void | |
116 | unregister_wide_hw_breakpoint(struct perf_event **cpu_events) { } | |
117 | static inline int | |
118 | reserve_bp_slot(struct perf_event *bp) {return -ENOSYS; } | |
119 | static inline void release_bp_slot(struct perf_event *bp) { } | |
120 | ||
121 | static inline void flush_ptrace_hw_breakpoint(struct task_struct *tsk) { } | |
b332828c | 122 | |
687b16fb FW |
123 | static inline struct arch_hw_breakpoint *counter_arch_bp(struct perf_event *bp) |
124 | { | |
125 | return NULL; | |
126 | } | |
127 | ||
24f1e32c | 128 | #endif /* CONFIG_HAVE_HW_BREAKPOINT */ |
5093ebad | 129 | #endif /* __KERNEL__ */ |
b332828c | 130 | |
24f1e32c | 131 | #endif /* _LINUX_HW_BREAKPOINT_H */ |