sandbox/win/src/sidestep/ia32_modrm_map.cpp

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 // Table of relevant information about how to decode the ModR/M byte.
   6 // Based on information in the IA-32 Intel Architecture
   7 // Software Developer's Manual Volume 2: Instruction Set Reference.
   8
   9 #include "sandbox/win/src/sidestep/mini_disassembler.h"
  10 #include "sandbox/win/src/sidestep/mini_disassembler_types.h"
  11
  12 namespace sidestep {
  13
  14 const ModrmEntry MiniDisassembler::s_ia16_modrm_map_[] = {
  15 // mod == 00
  16   /* r/m == 000 */ { false, false, OS_ZERO },
  17   /* r/m == 001 */ { false, false, OS_ZERO },
  18   /* r/m == 010 */ { false, false, OS_ZERO },
  19   /* r/m == 011 */ { false, false, OS_ZERO },
  20   /* r/m == 100 */ { false, false, OS_ZERO },
  21   /* r/m == 101 */ { false, false, OS_ZERO },
  22   /* r/m == 110 */ { true, false, OS_WORD },
  23   /* r/m == 111 */ { false, false, OS_ZERO },
  24 // mod == 01
  25   /* r/m == 000 */ { true, false, OS_BYTE },
  26   /* r/m == 001 */ { true, false, OS_BYTE },
  27   /* r/m == 010 */ { true, false, OS_BYTE },
  28   /* r/m == 011 */ { true, false, OS_BYTE },
  29   /* r/m == 100 */ { true, false, OS_BYTE },
  30   /* r/m == 101 */ { true, false, OS_BYTE },
  31   /* r/m == 110 */ { true, false, OS_BYTE },
  32   /* r/m == 111 */ { true, false, OS_BYTE },
  33 // mod == 10
  34   /* r/m == 000 */ { true, false, OS_WORD },
  35   /* r/m == 001 */ { true, false, OS_WORD },
  36   /* r/m == 010 */ { true, false, OS_WORD },
  37   /* r/m == 011 */ { true, false, OS_WORD },
  38   /* r/m == 100 */ { true, false, OS_WORD },
  39   /* r/m == 101 */ { true, false, OS_WORD },
  40   /* r/m == 110 */ { true, false, OS_WORD },
  41   /* r/m == 111 */ { true, false, OS_WORD },
  42 // mod == 11
  43   /* r/m == 000 */ { false, false, OS_ZERO },
  44   /* r/m == 001 */ { false, false, OS_ZERO },
  45   /* r/m == 010 */ { false, false, OS_ZERO },
  46   /* r/m == 011 */ { false, false, OS_ZERO },
  47   /* r/m == 100 */ { false, false, OS_ZERO },
  48   /* r/m == 101 */ { false, false, OS_ZERO },
  49   /* r/m == 110 */ { false, false, OS_ZERO },
  50   /* r/m == 111 */ { false, false, OS_ZERO }
  51 };
  52
  53 const ModrmEntry MiniDisassembler::s_ia32_modrm_map_[] = {
  54 // mod == 00
  55   /* r/m == 000 */ { false, false, OS_ZERO },
  56   /* r/m == 001 */ { false, false, OS_ZERO },
  57   /* r/m == 010 */ { false, false, OS_ZERO },
  58   /* r/m == 011 */ { false, false, OS_ZERO },
  59   /* r/m == 100 */ { false, true, OS_ZERO },
  60   /* r/m == 101 */ { true, false, OS_DOUBLE_WORD },
  61   /* r/m == 110 */ { false, false, OS_ZERO },
  62   /* r/m == 111 */ { false, false, OS_ZERO },
  63 // mod == 01
  64   /* r/m == 000 */ { true, false, OS_BYTE },
  65   /* r/m == 001 */ { true, false, OS_BYTE },
  66   /* r/m == 010 */ { true, false, OS_BYTE },
  67   /* r/m == 011 */ { true, false, OS_BYTE },
  68   /* r/m == 100 */ { true, true, OS_BYTE },
  69   /* r/m == 101 */ { true, false, OS_BYTE },
  70   /* r/m == 110 */ { true, false, OS_BYTE },
  71   /* r/m == 111 */ { true, false, OS_BYTE },
  72 // mod == 10
  73   /* r/m == 000 */ { true, false, OS_DOUBLE_WORD },
  74   /* r/m == 001 */ { true, false, OS_DOUBLE_WORD },
  75   /* r/m == 010 */ { true, false, OS_DOUBLE_WORD },
  76   /* r/m == 011 */ { true, false, OS_DOUBLE_WORD },
  77   /* r/m == 100 */ { true, true, OS_DOUBLE_WORD },
  78   /* r/m == 101 */ { true, false, OS_DOUBLE_WORD },
  79   /* r/m == 110 */ { true, false, OS_DOUBLE_WORD },
  80   /* r/m == 111 */ { true, false, OS_DOUBLE_WORD },
  81 // mod == 11
  82   /* r/m == 000 */ { false, false, OS_ZERO },
  83   /* r/m == 001 */ { false, false, OS_ZERO },
  84   /* r/m == 010 */ { false, false, OS_ZERO },
  85   /* r/m == 011 */ { false, false, OS_ZERO },
  86   /* r/m == 100 */ { false, false, OS_ZERO },
  87   /* r/m == 101 */ { false, false, OS_ZERO },
  88   /* r/m == 110 */ { false, false, OS_ZERO },
  89   /* r/m == 111 */ { false, false, OS_ZERO },
  90 };
  91
  92 };  // namespace sidestep