1 #ifndef _LINUX_HW_BREAKPOINT_H
2 #define _LINUX_HW_BREAKPOINT_H
5 HW_BREAKPOINT_LEN_1 = 1,
6 HW_BREAKPOINT_LEN_2 = 2,
7 HW_BREAKPOINT_LEN_4 = 4,
8 HW_BREAKPOINT_LEN_8 = 8,
19 #include <linux/perf_event.h>
21 #ifdef CONFIG_HAVE_HW_BREAKPOINT
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), \
31 static inline void hw_breakpoint_init(struct perf_event_attr *attr)
33 attr->type = PERF_TYPE_BREAKPOINT;
34 attr->size = sizeof(*attr);
38 static inline unsigned long hw_breakpoint_addr(struct perf_event *bp)
40 return bp->attr.bp_addr;
43 static inline int hw_breakpoint_type(struct perf_event *bp)
45 return bp->attr.bp_type;
48 static inline int hw_breakpoint_len(struct perf_event *bp)
50 return bp->attr.bp_len;
53 extern struct perf_event *
54 register_user_hw_breakpoint(struct perf_event_attr *attr,
55 perf_callback_t triggered,
56 struct task_struct *tsk);
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,
61 struct perf_event_attr *attr,
62 perf_callback_t triggered,
63 struct task_struct *tsk);
66 * Kernel breakpoints are not associated with any particular thread.
68 extern struct perf_event *
69 register_wide_hw_breakpoint_cpu(struct perf_event_attr *attr,
70 perf_callback_t triggered,
73 extern struct perf_event **
74 register_wide_hw_breakpoint(struct perf_event_attr *attr,
75 perf_callback_t triggered);
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);
82 extern int reserve_bp_slot(struct perf_event *bp);
83 extern void release_bp_slot(struct perf_event *bp);
85 extern void flush_ptrace_hw_breakpoint(struct task_struct *tsk);
87 static inline struct arch_hw_breakpoint *counter_arch_bp(struct perf_event *bp)
92 #else /* !CONFIG_HAVE_HW_BREAKPOINT */
94 static inline struct perf_event *
95 register_user_hw_breakpoint(struct perf_event_attr *attr,
96 perf_callback_t triggered,
97 struct task_struct *tsk) { return NULL; }
98 static inline struct perf_event *
99 modify_user_hw_breakpoint(struct perf_event *bp,
100 struct perf_event_attr *attr,
101 perf_callback_t triggered,
102 struct task_struct *tsk) { return NULL; }
103 static inline struct perf_event *
104 register_wide_hw_breakpoint_cpu(struct perf_event_attr *attr,
105 perf_callback_t triggered,
106 int cpu) { return NULL; }
107 static inline struct perf_event **
108 register_wide_hw_breakpoint(struct perf_event_attr *attr,
109 perf_callback_t triggered) { return NULL; }
111 register_perf_hw_breakpoint(struct perf_event *bp) { return -ENOSYS; }
113 __register_perf_hw_breakpoint(struct perf_event *bp) { return -ENOSYS; }
114 static inline void unregister_hw_breakpoint(struct perf_event *bp) { }
116 unregister_wide_hw_breakpoint(struct perf_event **cpu_events) { }
118 reserve_bp_slot(struct perf_event *bp) {return -ENOSYS; }
119 static inline void release_bp_slot(struct perf_event *bp) { }
121 static inline void flush_ptrace_hw_breakpoint(struct task_struct *tsk) { }
123 static inline struct arch_hw_breakpoint *counter_arch_bp(struct perf_event *bp)
128 #endif /* CONFIG_HAVE_HW_BREAKPOINT */
129 #endif /* __KERNEL__ */
131 #endif /* _LINUX_HW_BREAKPOINT_H */