#ifndef _LINUX_HW_BREAKPOINT_H #define _LINUX_HW_BREAKPOINT_H #include <linux/perf_event.h> #include <uapi/linux/hw_breakpoint.h> #ifdef CONFIG_HAVE_HW_BREAKPOINT extern int __init init_hw_breakpoint(void); static inline void hw_breakpoint_init(struct perf_event_attr *attr) { memset(attr, 0, sizeof(*attr)); attr->type = PERF_TYPE_BREAKPOINT; attr->size = sizeof(*attr); /* * As it's for in-kernel or ptrace use, we want it to be pinned * and to call its callback every hits. */ attr->pinned = 1; attr->sample_period = 1; } static inline void ptrace_breakpoint_init(struct perf_event_attr *attr) { hw_breakpoint_init(attr); attr->exclude_kernel = 1; } static inline unsigned long hw_breakpoint_addr(struct perf_event *bp) { return bp->attr.bp_addr; } static inline int hw_breakpoint_type(struct perf_event *bp) { return bp->attr.bp_type; } static inline unsigned long hw_breakpoint_len(struct perf_event *bp) { return bp->attr.bp_len; } extern struct perf_event * register_user_hw_breakpoint(struct perf_event_attr *attr, perf_overflow_handler_t triggered, void *context, struct task_struct *tsk); /* FIXME: only change from the attr, and don't unregister */ extern int modify_user_hw_breakpoint(struct perf_event *bp, struct perf_event_attr *attr); /* * Kernel breakpoints are not associated with any particular thread. */ extern struct perf_event * register_wide_hw_breakpoint_cpu(struct perf_event_attr *attr, perf_overflow_handler_t triggered, void *context, int cpu); extern struct perf_event * __percpu * register_wide_hw_breakpoint(struct perf_event_attr *attr, perf_overflow_handler_t triggered, void *context); extern int register_perf_hw_breakpoint(struct perf_event *bp); extern int __register_perf_hw_breakpoint(struct perf_event *bp); extern void unregister_hw_breakpoint(struct perf_event *bp); extern void unregister_wide_hw_breakpoint(struct perf_event * __percpu *cpu_events); extern int dbg_reserve_bp_slot(struct perf_event *bp); extern int dbg_release_bp_slot(struct perf_event *bp); extern int reserve_bp_slot(struct perf_event *bp); extern void release_bp_slot(struct perf_event *bp); extern void flush_ptrace_hw_breakpoint(struct task_struct *tsk); static inline struct arch_hw_breakpoint *counter_arch_bp(struct perf_event *bp) { return &bp->hw.info; } #else /* !CONFIG_HAVE_HW_BREAKPOINT */ static inline int __init init_hw_breakpoint(void) { return 0; } static inline struct perf_event * register_user_hw_breakpoint(struct perf_event_attr *attr, perf_overflow_handler_t triggered, void *context, struct task_struct *tsk) { return NULL; } static inline int modify_user_hw_breakpoint(struct perf_event *bp, struct perf_event_attr *attr) { return -ENOSYS; } static inline struct perf_event * register_wide_hw_breakpoint_cpu(struct perf_event_attr *attr, perf_overflow_handler_t triggered, void *context, int cpu) { return NULL; } static inline struct perf_event * __percpu * register_wide_hw_breakpoint(struct perf_event_attr *attr, perf_overflow_handler_t triggered, void *context) { return NULL; } static inline int register_perf_hw_breakpoint(struct perf_event *bp) { return -ENOSYS; } static inline int __register_perf_hw_breakpoint(struct perf_event *bp) { return -ENOSYS; } static inline void unregister_hw_breakpoint(struct perf_event *bp) { } static inline void unregister_wide_hw_breakpoint(struct perf_event * __percpu *cpu_events) { } static inline int reserve_bp_slot(struct perf_event *bp) {return -ENOSYS; } static inline void release_bp_slot(struct perf_event *bp) { } static inline void flush_ptrace_hw_breakpoint(struct task_struct *tsk) { } static inline struct arch_hw_breakpoint *counter_arch_bp(struct perf_event *bp) { return NULL; } #endif /* CONFIG_HAVE_HW_BREAKPOINT */ #endif /* _LINUX_HW_BREAKPOINT_H */