95 lines
3.6 KiB
C++
95 lines
3.6 KiB
C++
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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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/*
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* Table of relevant information about how to decode the ModR/M byte.
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* Based on information in the IA 32 Intel Architecture
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* Software Developer's Manual Volume 2: Instruction Set Reference.
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*/
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#include "mini_disassembler.h"
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#include "mini_disassembler_types.h"
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namespace sidestep {
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const ModrmEntry MiniDisassembler::s_ia16_modrm_map_[] = {
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// mod == 00
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/* r/m == 000 */ { false, false, OS_ZERO },
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/* r/m == 001 */ { false, false, OS_ZERO },
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/* r/m == 010 */ { false, false, OS_ZERO },
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/* r/m == 011 */ { false, false, OS_ZERO },
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/* r/m == 100 */ { false, false, OS_ZERO },
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/* r/m == 101 */ { false, false, OS_ZERO },
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/* r/m == 110 */ { true, false, OS_WORD },
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/* r/m == 111 */ { false, false, OS_ZERO },
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// mod == 01
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/* r/m == 000 */ { true, false, OS_BYTE },
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/* r/m == 001 */ { true, false, OS_BYTE },
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/* r/m == 010 */ { true, false, OS_BYTE },
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/* r/m == 011 */ { true, false, OS_BYTE },
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/* r/m == 100 */ { true, false, OS_BYTE },
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/* r/m == 101 */ { true, false, OS_BYTE },
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/* r/m == 110 */ { true, false, OS_BYTE },
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/* r/m == 111 */ { true, false, OS_BYTE },
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// mod == 10
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/* r/m == 000 */ { true, false, OS_WORD },
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/* r/m == 001 */ { true, false, OS_WORD },
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/* r/m == 010 */ { true, false, OS_WORD },
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/* r/m == 011 */ { true, false, OS_WORD },
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/* r/m == 100 */ { true, false, OS_WORD },
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/* r/m == 101 */ { true, false, OS_WORD },
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/* r/m == 110 */ { true, false, OS_WORD },
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/* r/m == 111 */ { true, false, OS_WORD },
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// mod == 11
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/* r/m == 000 */ { false, false, OS_ZERO },
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/* r/m == 001 */ { false, false, OS_ZERO },
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/* r/m == 010 */ { false, false, OS_ZERO },
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/* r/m == 011 */ { false, false, OS_ZERO },
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/* r/m == 100 */ { false, false, OS_ZERO },
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/* r/m == 101 */ { false, false, OS_ZERO },
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/* r/m == 110 */ { false, false, OS_ZERO },
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/* r/m == 111 */ { false, false, OS_ZERO }
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};
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const ModrmEntry MiniDisassembler::s_ia32_modrm_map_[] = {
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// mod == 00
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/* r/m == 000 */ { false, false, OS_ZERO },
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/* r/m == 001 */ { false, false, OS_ZERO },
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/* r/m == 010 */ { false, false, OS_ZERO },
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/* r/m == 011 */ { false, false, OS_ZERO },
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/* r/m == 100 */ { false, true, OS_ZERO },
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/* r/m == 101 */ { true, false, OS_DOUBLE_WORD },
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/* r/m == 110 */ { false, false, OS_ZERO },
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/* r/m == 111 */ { false, false, OS_ZERO },
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// mod == 01
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/* r/m == 000 */ { true, false, OS_BYTE },
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/* r/m == 001 */ { true, false, OS_BYTE },
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/* r/m == 010 */ { true, false, OS_BYTE },
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/* r/m == 011 */ { true, false, OS_BYTE },
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/* r/m == 100 */ { true, true, OS_BYTE },
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/* r/m == 101 */ { true, false, OS_BYTE },
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/* r/m == 110 */ { true, false, OS_BYTE },
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/* r/m == 111 */ { true, false, OS_BYTE },
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// mod == 10
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/* r/m == 000 */ { true, false, OS_DOUBLE_WORD },
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/* r/m == 001 */ { true, false, OS_DOUBLE_WORD },
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/* r/m == 010 */ { true, false, OS_DOUBLE_WORD },
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/* r/m == 011 */ { true, false, OS_DOUBLE_WORD },
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/* r/m == 100 */ { true, true, OS_DOUBLE_WORD },
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/* r/m == 101 */ { true, false, OS_DOUBLE_WORD },
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/* r/m == 110 */ { true, false, OS_DOUBLE_WORD },
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/* r/m == 111 */ { true, false, OS_DOUBLE_WORD },
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// mod == 11
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/* r/m == 000 */ { false, false, OS_ZERO },
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/* r/m == 001 */ { false, false, OS_ZERO },
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/* r/m == 010 */ { false, false, OS_ZERO },
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/* r/m == 011 */ { false, false, OS_ZERO },
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/* r/m == 100 */ { false, false, OS_ZERO },
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/* r/m == 101 */ { false, false, OS_ZERO },
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/* r/m == 110 */ { false, false, OS_ZERO },
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/* r/m == 111 */ { false, false, OS_ZERO },
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};
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}; // namespace sidestep
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