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#ifndef _I386_HW_BREAKPOINT_H
#define _I386_HW_BREAKPOINT_H
#ifdef __KERNEL__
#define __ARCH_HW_BREAKPOINT_H
struct arch_hw_breakpoint {
char *name; /* Contains name of the symbol to set bkpt */
unsigned long address;
u8 len;
u8 type;
};
#include <linux/kdebug.h>
#include <asm-generic/hw_breakpoint.h>
/* Available HW breakpoint length encodings */
#define HW_BREAKPOINT_LEN_1 0x40
#define HW_BREAKPOINT_LEN_2 0x44
#define HW_BREAKPOINT_LEN_4 0x4c
#define HW_BREAKPOINT_LEN_EXECUTE 0x40
#ifdef CONFIG_X86_64
#define HW_BREAKPOINT_LEN_8 0x48
#endif
/* Available HW breakpoint type encodings */
/* trigger on instruction execute */
#define HW_BREAKPOINT_EXECUTE 0x80
/* trigger on memory write */
#define HW_BREAKPOINT_WRITE 0x81
/* trigger on memory read or write */
#define HW_BREAKPOINT_RW 0x83
/* Total number of available HW breakpoint registers */
#define HBP_NUM 4
extern struct hw_breakpoint *hbp_kernel[HBP_NUM];
DECLARE_PER_CPU(struct hw_breakpoint*, this_hbp_kernel[HBP_NUM]);
extern unsigned int hbp_user_refcount[HBP_NUM];
extern void arch_install_thread_hw_breakpoint(struct task_struct *tsk);
extern void arch_uninstall_thread_hw_breakpoint(void);
extern int arch_check_va_in_userspace(unsigned long va, u8 hbp_len);
extern int arch_validate_hwbkpt_settings(struct hw_breakpoint *bp,
struct task_struct *tsk);
extern void arch_update_user_hw_breakpoint(int pos, struct task_struct *tsk);
extern void arch_flush_thread_hw_breakpoint(struct task_struct *tsk);
extern void arch_update_kernel_hw_breakpoint(void *);
extern int hw_breakpoint_exceptions_notify(struct notifier_block *unused,
unsigned long val, void *data);
#endif /* __KERNEL__ */
#endif /* _I386_HW_BREAKPOINT_H */
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