139 lines
4.2 KiB
C
139 lines
4.2 KiB
C
/* 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
|
|
|
|
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);
|
|
extern int
|
|
modify_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);
|
|
int arch_reserve_bp_slot(struct perf_event *bp);
|
|
void arch_release_bp_slot(struct perf_event *bp);
|
|
void arch_unregister_hw_breakpoint(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 int
|
|
modify_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 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 bool hw_breakpoint_is_used(void) { return false; }
|
|
|
|
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 */
|