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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 | ||
24f1e32c FW |
23 | static inline unsigned long hw_breakpoint_addr(struct perf_event *bp) |
24 | { | |
25 | return bp->attr.bp_addr; | |
26 | } | |
27 | ||
28 | static inline int hw_breakpoint_type(struct perf_event *bp) | |
29 | { | |
30 | return bp->attr.bp_type; | |
31 | } | |
32 | ||
33 | static inline int hw_breakpoint_len(struct perf_event *bp) | |
34 | { | |
35 | return bp->attr.bp_len; | |
36 | } | |
37 | ||
24f1e32c FW |
38 | extern struct perf_event * |
39 | register_user_hw_breakpoint(unsigned long addr, | |
40 | int len, | |
41 | int type, | |
42 | perf_callback_t triggered, | |
43 | struct task_struct *tsk, | |
44 | bool active); | |
45 | ||
46 | /* FIXME: only change from the attr, and don't unregister */ | |
47 | extern struct perf_event * | |
48 | modify_user_hw_breakpoint(struct perf_event *bp, | |
49 | unsigned long addr, | |
50 | int len, | |
51 | int type, | |
52 | perf_callback_t triggered, | |
53 | struct task_struct *tsk, | |
54 | bool active); | |
b332828c | 55 | |
b332828c P |
56 | /* |
57 | * Kernel breakpoints are not associated with any particular thread. | |
58 | */ | |
24f1e32c FW |
59 | extern struct perf_event * |
60 | register_wide_hw_breakpoint_cpu(unsigned long addr, | |
61 | int len, | |
62 | int type, | |
63 | perf_callback_t triggered, | |
64 | int cpu, | |
65 | bool active); | |
66 | ||
67 | extern struct perf_event ** | |
68 | register_wide_hw_breakpoint(unsigned long addr, | |
69 | int len, | |
70 | int type, | |
71 | perf_callback_t triggered, | |
72 | bool active); | |
73 | ||
74 | extern int register_perf_hw_breakpoint(struct perf_event *bp); | |
75 | extern int __register_perf_hw_breakpoint(struct perf_event *bp); | |
76 | extern void unregister_hw_breakpoint(struct perf_event *bp); | |
77 | extern void unregister_wide_hw_breakpoint(struct perf_event **cpu_events); | |
78 | ||
79 | extern int reserve_bp_slot(struct perf_event *bp); | |
80 | extern void release_bp_slot(struct perf_event *bp); | |
81 | ||
82 | extern void flush_ptrace_hw_breakpoint(struct task_struct *tsk); | |
83 | ||
687b16fb FW |
84 | static inline struct arch_hw_breakpoint *counter_arch_bp(struct perf_event *bp) |
85 | { | |
86 | return &bp->hw.info; | |
87 | } | |
88 | ||
24f1e32c FW |
89 | #else /* !CONFIG_HAVE_HW_BREAKPOINT */ |
90 | ||
91 | static inline struct perf_event * | |
92 | register_user_hw_breakpoint(unsigned long addr, | |
93 | int len, | |
94 | int type, | |
95 | perf_callback_t triggered, | |
96 | struct task_struct *tsk, | |
97 | bool active) { return NULL; } | |
98 | static inline struct perf_event * | |
99 | modify_user_hw_breakpoint(struct perf_event *bp, | |
100 | unsigned long addr, | |
101 | int len, | |
102 | int type, | |
103 | perf_callback_t triggered, | |
104 | struct task_struct *tsk, | |
105 | bool active) { return NULL; } | |
106 | static inline struct perf_event * | |
107 | register_wide_hw_breakpoint_cpu(unsigned long addr, | |
108 | int len, | |
109 | int type, | |
110 | perf_callback_t triggered, | |
111 | int cpu, | |
112 | bool active) { return NULL; } | |
113 | static inline struct perf_event ** | |
114 | register_wide_hw_breakpoint(unsigned long addr, | |
115 | int len, | |
116 | int type, | |
117 | perf_callback_t triggered, | |
118 | bool active) { return NULL; } | |
119 | static inline int | |
120 | register_perf_hw_breakpoint(struct perf_event *bp) { return -ENOSYS; } | |
121 | static inline int | |
122 | __register_perf_hw_breakpoint(struct perf_event *bp) { return -ENOSYS; } | |
123 | static inline void unregister_hw_breakpoint(struct perf_event *bp) { } | |
124 | static inline void | |
125 | unregister_wide_hw_breakpoint(struct perf_event **cpu_events) { } | |
126 | static inline int | |
127 | reserve_bp_slot(struct perf_event *bp) {return -ENOSYS; } | |
128 | static inline void release_bp_slot(struct perf_event *bp) { } | |
129 | ||
130 | static inline void flush_ptrace_hw_breakpoint(struct task_struct *tsk) { } | |
b332828c | 131 | |
687b16fb FW |
132 | static inline struct arch_hw_breakpoint *counter_arch_bp(struct perf_event *bp) |
133 | { | |
134 | return NULL; | |
135 | } | |
136 | ||
24f1e32c | 137 | #endif /* CONFIG_HAVE_HW_BREAKPOINT */ |
5093ebad | 138 | #endif /* __KERNEL__ */ |
b332828c | 139 | |
24f1e32c | 140 | #endif /* _LINUX_HW_BREAKPOINT_H */ |