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 unsigned long hw_breakpoint_addr(struct perf_event *bp)
33 return bp->attr.bp_addr;
36 static inline int hw_breakpoint_type(struct perf_event *bp)
38 return bp->attr.bp_type;
41 static inline int hw_breakpoint_len(struct perf_event *bp)
43 return bp->attr.bp_len;
46 extern struct perf_event *
47 register_user_hw_breakpoint(struct perf_event_attr *attr,
48 perf_callback_t triggered,
49 struct task_struct *tsk);
51 /* FIXME: only change from the attr, and don't unregister */
52 extern struct perf_event *
53 modify_user_hw_breakpoint(struct perf_event *bp,
54 struct perf_event_attr *attr,
55 perf_callback_t triggered,
56 struct task_struct *tsk);
59 * Kernel breakpoints are not associated with any particular thread.
61 extern struct perf_event *
62 register_wide_hw_breakpoint_cpu(unsigned long addr,
65 perf_callback_t triggered,
69 extern struct perf_event **
70 register_wide_hw_breakpoint(unsigned long addr,
73 perf_callback_t triggered,
76 extern int register_perf_hw_breakpoint(struct perf_event *bp);
77 extern int __register_perf_hw_breakpoint(struct perf_event *bp);
78 extern void unregister_hw_breakpoint(struct perf_event *bp);
79 extern void unregister_wide_hw_breakpoint(struct perf_event **cpu_events);
81 extern int reserve_bp_slot(struct perf_event *bp);
82 extern void release_bp_slot(struct perf_event *bp);
84 extern void flush_ptrace_hw_breakpoint(struct task_struct *tsk);
86 static inline struct arch_hw_breakpoint *counter_arch_bp(struct perf_event *bp)
91 #else /* !CONFIG_HAVE_HW_BREAKPOINT */
93 static inline struct perf_event *
94 register_user_hw_breakpoint(struct perf_event_attr *attr,
95 perf_callback_t triggered,
96 struct task_struct *tsk) { return NULL; }
97 static inline struct perf_event *
98 modify_user_hw_breakpoint(struct perf_event *bp,
99 struct perf_event_attr *attr,
100 perf_callback_t triggered,
101 struct task_struct *tsk) { return NULL; }
102 static inline struct perf_event *
103 register_wide_hw_breakpoint_cpu(unsigned long addr,
106 perf_callback_t triggered,
108 bool active) { return NULL; }
109 static inline struct perf_event **
110 register_wide_hw_breakpoint(unsigned long addr,
113 perf_callback_t triggered,
114 bool active) { return NULL; }
116 register_perf_hw_breakpoint(struct perf_event *bp) { return -ENOSYS; }
118 __register_perf_hw_breakpoint(struct perf_event *bp) { return -ENOSYS; }
119 static inline void unregister_hw_breakpoint(struct perf_event *bp) { }
121 unregister_wide_hw_breakpoint(struct perf_event **cpu_events) { }
123 reserve_bp_slot(struct perf_event *bp) {return -ENOSYS; }
124 static inline void release_bp_slot(struct perf_event *bp) { }
126 static inline void flush_ptrace_hw_breakpoint(struct task_struct *tsk) { }
128 static inline struct arch_hw_breakpoint *counter_arch_bp(struct perf_event *bp)
133 #endif /* CONFIG_HAVE_HW_BREAKPOINT */
134 #endif /* __KERNEL__ */
136 #endif /* _LINUX_HW_BREAKPOINT_H */