arch/x86/include/asm/hw_breakpoint.h

   1 #ifndef _I386_HW_BREAKPOINT_H
   2 #define _I386_HW_BREAKPOINT_H
   3
   4 #ifdef  __KERNEL__
   5 #define __ARCH_HW_BREAKPOINT_H
   6
   7 struct arch_hw_breakpoint {
   8         char            *name; /* Contains name of the symbol to set bkpt */
   9         unsigned long   address;
  10         u8              len;
  11         u8              type;
  12 };
  13
  14 #include <linux/kdebug.h>
  15 #include <asm-generic/hw_breakpoint.h>
  16
  17 /* Available HW breakpoint length encodings */
  18 #define HW_BREAKPOINT_LEN_1             0x40
  19 #define HW_BREAKPOINT_LEN_2             0x44
  20 #define HW_BREAKPOINT_LEN_4             0x4c
  21 #define HW_BREAKPOINT_LEN_EXECUTE       0x40
  22
  23 #ifdef CONFIG_X86_64
  24 #define HW_BREAKPOINT_LEN_8             0x48
  25 #endif
  26
  27 /* Available HW breakpoint type encodings */
  28
  29 /* trigger on instruction execute */
  30 #define HW_BREAKPOINT_EXECUTE   0x80
  31 /* trigger on memory write */
  32 #define HW_BREAKPOINT_WRITE     0x81
  33 /* trigger on memory read or write */
  34 #define HW_BREAKPOINT_RW        0x83
  35
  36 /* Total number of available HW breakpoint registers */
  37 #define HBP_NUM 4
  38
  39 extern struct hw_breakpoint *hbp_kernel[HBP_NUM];
  40 DECLARE_PER_CPU(struct hw_breakpoint*, this_hbp_kernel[HBP_NUM]);
  41 extern unsigned int hbp_user_refcount[HBP_NUM];
  42
  43 extern void arch_install_thread_hw_breakpoint(struct task_struct *tsk);
  44 extern void arch_uninstall_thread_hw_breakpoint(void);
  45 extern int arch_check_va_in_userspace(unsigned long va, u8 hbp_len);
  46 extern int arch_validate_hwbkpt_settings(struct hw_breakpoint *bp,
  47                                                 struct task_struct *tsk);
  48 extern void arch_update_user_hw_breakpoint(int pos, struct task_struct *tsk);
  49 extern void arch_flush_thread_hw_breakpoint(struct task_struct *tsk);
  50 extern void arch_update_kernel_hw_breakpoint(void *);
  51 extern int hw_breakpoint_exceptions_notify(struct notifier_block *unused,
  52                                      unsigned long val, void *data);
  53 #endif  /* __KERNEL__ */
  54 #endif  /* _I386_HW_BREAKPOINT_H */
  55