arch/x86/include/asm/mpx.h

   1 #ifndef _ASM_X86_MPX_H
   2 #define _ASM_X86_MPX_H
   3
   4 #include <linux/types.h>
   5 #include <asm/ptrace.h>
   6 #include <asm/insn.h>
   7
   8 #ifdef CONFIG_X86_64
   9
  10 /* upper 28 bits [47:20] of the virtual address in 64-bit used to
  11  * index into bounds directory (BD).
  12  */
  13 #define MPX_BD_ENTRY_OFFSET     28
  14 #define MPX_BD_ENTRY_SHIFT      3
  15 /* bits [19:3] of the virtual address in 64-bit used to index into
  16  * bounds table (BT).
  17  */
  18 #define MPX_BT_ENTRY_OFFSET     17
  19 #define MPX_BT_ENTRY_SHIFT      5
  20 #define MPX_IGN_BITS            3
  21
  22 #else
  23
  24 #define MPX_BD_ENTRY_OFFSET     20
  25 #define MPX_BD_ENTRY_SHIFT      2
  26 #define MPX_BT_ENTRY_OFFSET     10
  27 #define MPX_BT_ENTRY_SHIFT      4
  28 #define MPX_IGN_BITS            2
  29
  30 #endif
  31
  32 #define MPX_BD_SIZE_BYTES (1UL<<(MPX_BD_ENTRY_OFFSET+MPX_BD_ENTRY_SHIFT))
  33 #define MPX_BT_SIZE_BYTES (1UL<<(MPX_BT_ENTRY_OFFSET+MPX_BT_ENTRY_SHIFT))
  34
  35 #define MPX_BNDSTA_ERROR_CODE   0x3
  36
  37 #ifdef CONFIG_X86_INTEL_MPX
  38 siginfo_t *mpx_generate_siginfo(struct pt_regs *regs,
  39                                 struct xsave_struct *xsave_buf);
  40 #else
  41 static inline siginfo_t *mpx_generate_siginfo(struct pt_regs *regs,
  42                                               struct xsave_struct *xsave_buf)
  43 {
  44         return NULL;
  45 }
  46 #endif /* CONFIG_X86_INTEL_MPX */
  47
  48 #endif /* _ASM_X86_MPX_H */