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122 lines
5.1 KiB
C++
122 lines
5.1 KiB
C++
// -*- Mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*-
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/* Copyright (c) 2007, Google Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Google Inc. nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* ---
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* Author: Joi Sigurdsson
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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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