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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146/* SPDX-License-Identifier: GPL-2.0 */#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
enum bp_type_idx { TYPE_INST = 0,#if defined(CONFIG_HAVE_MIXED_BREAKPOINTS_REGS) TYPE_DATA = 0,#else TYPE_DATA = 1,#endif TYPE_MAX};
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 intmodify_user_hw_breakpoint(struct perf_event *bp, struct perf_event_attr *attr);extern intmodify_user_hw_breakpoint_check(struct perf_event *bp, struct perf_event_attr *attr, bool check);
/* * 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 void unregister_hw_breakpoint(struct perf_event *bp);extern void unregister_wide_hw_breakpoint(struct perf_event * __percpu *cpu_events);extern bool hw_breakpoint_is_used(void);
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 intmodify_user_hw_breakpoint(struct perf_event *bp, struct perf_event_attr *attr) { return -ENOSYS; }static inline intmodify_user_hw_breakpoint_check(struct perf_event *bp, struct perf_event_attr *attr, bool check) { 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 intregister_perf_hw_breakpoint(struct perf_event *bp) { return -ENOSYS; }static inline void unregister_hw_breakpoint(struct perf_event *bp) { }static inline voidunregister_wide_hw_breakpoint(struct perf_event * __percpu *cpu_events) { }static inline bool hw_breakpoint_is_used(void) { return false; }
static inline intreserve_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 */