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comparison: security/sandbox/win/src/sidestep/ia32_modrm_map.cpp
security/sandbox/win/src/sidestep/ia32_modrm_map.cpp
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| 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 |
