kernel/arch/i386/debugreg.h

   1 #ifndef __DEBUGREG_H__
   2 #define __DEBUGREG_H__
   3
   4 /* DR6: status flags */
   5 #define DR6_B(bp)       (1 << (bp))     /* breakpoint was triggered */
   6 #define DR6_BD          (1 << 13)       /* debug register access detected */
   7 #define DR6_BS          (1 << 14)       /* single step */
   8 #define DR6_BT          (1 << 15)       /* task switch */
   9
  10 /* DR7: control flags */
  11 #define DR7_L(bp)       (1 << (2*(bp)))         /* breakpoint armed locally */
  12 #define DR7_G(bp)       (1 << (1+2*(bp)))       /* breakpoint armed globally */
  13 #define DR7_LE          (1 << 8)                /* exact local breakpoints */
  14 #define DR7_GE          (1 << 9)                /* exact global breakpoints */
  15 #define DR7_GD          (1 << 13)               /* detect debug reg movs */
  16
  17 #define DR7_RW_MASK(bp)         (3 << (16+4*(bp)))
  18 #define DR7_RW_EXEC(bp)         (0 << (16+4*(bp)))      /* execute */
  19 #define DR7_RW_WRITE(bp)        (1 << (16+4*(bp)))      /* write */
  20 #define DR7_RW_IO(bp)           (2 << (16+4*(bp)))      /* IO */
  21 #define DR7_RW_RW(bp)           (3 << (16+4*(bp)))      /* read or write */
  22
  23 #define DR7_LN_MASK(bp) (3 << (18+4*(bp)))
  24 #define DR7_LN_1(bp)    (0 << (18+4*(bp)))      /* 1 byte */
  25 #define DR7_LN_2(bp)    (1 << (18+4*(bp)))      /* 2 bytes */
  26 #define DR7_LN_8(bp)    (2 << (18+4*(bp)))      /* 8 bytes */
  27 #define DR7_LN_4(bp)    (3 << (18+4*(bp)))      /* 4 bytes */
  28
  29 /* debugreg.S */
  30 void ld_dr0(phys_bytes value);
  31 void ld_dr1(phys_bytes value);
  32 void ld_dr2(phys_bytes value);
  33 void ld_dr3(phys_bytes value);
  34 void ld_dr6(unsigned long value);
  35 void ld_dr7(unsigned long value);
  36 phys_bytes st_dr0(void);
  37 phys_bytes st_dr1(void);
  38 phys_bytes st_dr2(void);
  39 phys_bytes st_dr3(void);
  40 unsigned long st_dr6(void);
  41 unsigned long st_dr7(void);
  42
  43 #endif /* __DEBUGREG_H__ */
  44