1 /* Copyright (c) 2007, Google Inc. 2 * All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 * 30 * --- 31 * Author: Joi Sigurdsson 32 * 33 * Table of relevant information about how to decode the ModR/M byte. 34 * Based on information in the IA-32 Intel Architecture 35 * Software Developer's Manual Volume 2: Instruction Set Reference. 36 */ 37 38 #include "mini_disassembler.h" 39 #include "mini_disassembler_types.h" 40 41 namespace sidestep { 42 43 const ModrmEntry MiniDisassembler::s_ia16_modrm_map_[] = { 44 // mod == 00 45 /* r/m == 000 */ { false, false, OS_ZERO }, 46 /* r/m == 001 */ { false, false, OS_ZERO }, 47 /* r/m == 010 */ { false, false, OS_ZERO }, 48 /* r/m == 011 */ { false, false, OS_ZERO }, 49 /* r/m == 100 */ { false, false, OS_ZERO }, 50 /* r/m == 101 */ { false, false, OS_ZERO }, 51 /* r/m == 110 */ { true, false, OS_WORD }, 52 /* r/m == 111 */ { false, false, OS_ZERO }, 53 // mod == 01 54 /* r/m == 000 */ { true, false, OS_BYTE }, 55 /* r/m == 001 */ { true, false, OS_BYTE }, 56 /* r/m == 010 */ { true, false, OS_BYTE }, 57 /* r/m == 011 */ { true, false, OS_BYTE }, 58 /* r/m == 100 */ { true, false, OS_BYTE }, 59 /* r/m == 101 */ { true, false, OS_BYTE }, 60 /* r/m == 110 */ { true, false, OS_BYTE }, 61 /* r/m == 111 */ { true, false, OS_BYTE }, 62 // mod == 10 63 /* r/m == 000 */ { true, false, OS_WORD }, 64 /* r/m == 001 */ { true, false, OS_WORD }, 65 /* r/m == 010 */ { true, false, OS_WORD }, 66 /* r/m == 011 */ { true, false, OS_WORD }, 67 /* r/m == 100 */ { true, false, OS_WORD }, 68 /* r/m == 101 */ { true, false, OS_WORD }, 69 /* r/m == 110 */ { true, false, OS_WORD }, 70 /* r/m == 111 */ { true, false, OS_WORD }, 71 // mod == 11 72 /* r/m == 000 */ { false, false, OS_ZERO }, 73 /* r/m == 001 */ { false, false, OS_ZERO }, 74 /* r/m == 010 */ { false, false, OS_ZERO }, 75 /* r/m == 011 */ { false, false, OS_ZERO }, 76 /* r/m == 100 */ { false, false, OS_ZERO }, 77 /* r/m == 101 */ { false, false, OS_ZERO }, 78 /* r/m == 110 */ { false, false, OS_ZERO }, 79 /* r/m == 111 */ { false, false, OS_ZERO } 80 }; 81 82 const ModrmEntry MiniDisassembler::s_ia32_modrm_map_[] = { 83 // mod == 00 84 /* r/m == 000 */ { false, false, OS_ZERO }, 85 /* r/m == 001 */ { false, false, OS_ZERO }, 86 /* r/m == 010 */ { false, false, OS_ZERO }, 87 /* r/m == 011 */ { false, false, OS_ZERO }, 88 /* r/m == 100 */ { false, true, OS_ZERO }, 89 /* r/m == 101 */ { true, false, OS_DOUBLE_WORD }, 90 /* r/m == 110 */ { false, false, OS_ZERO }, 91 /* r/m == 111 */ { false, false, OS_ZERO }, 92 // mod == 01 93 /* r/m == 000 */ { true, false, OS_BYTE }, 94 /* r/m == 001 */ { true, false, OS_BYTE }, 95 /* r/m == 010 */ { true, false, OS_BYTE }, 96 /* r/m == 011 */ { true, false, OS_BYTE }, 97 /* r/m == 100 */ { true, true, OS_BYTE }, 98 /* r/m == 101 */ { true, false, OS_BYTE }, 99 /* r/m == 110 */ { true, false, OS_BYTE }, 100 /* r/m == 111 */ { true, false, OS_BYTE }, 101 // mod == 10 102 /* r/m == 000 */ { true, false, OS_DOUBLE_WORD }, 103 /* r/m == 001 */ { true, false, OS_DOUBLE_WORD }, 104 /* r/m == 010 */ { true, false, OS_DOUBLE_WORD }, 105 /* r/m == 011 */ { true, false, OS_DOUBLE_WORD }, 106 /* r/m == 100 */ { true, true, OS_DOUBLE_WORD }, 107 /* r/m == 101 */ { true, false, OS_DOUBLE_WORD }, 108 /* r/m == 110 */ { true, false, OS_DOUBLE_WORD }, 109 /* r/m == 111 */ { true, false, OS_DOUBLE_WORD }, 110 // mod == 11 111 /* r/m == 000 */ { false, false, OS_ZERO }, 112 /* r/m == 001 */ { false, false, OS_ZERO }, 113 /* r/m == 010 */ { false, false, OS_ZERO }, 114 /* r/m == 011 */ { false, false, OS_ZERO }, 115 /* r/m == 100 */ { false, false, OS_ZERO }, 116 /* r/m == 101 */ { false, false, OS_ZERO }, 117 /* r/m == 110 */ { false, false, OS_ZERO }, 118 /* r/m == 111 */ { false, false, OS_ZERO }, 119 }; 120 121 }; // namespace sidestep 122
