forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
136 lines
4.1 KiB
136 lines
4.1 KiB
/* 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 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 hw_breakpoint_weight(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 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 */
|
|
|