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// Copyright 2008, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// Table of relevant information about how to decode the ModR/M byte.
// Based on information in the IA-32 Intel Architecture
// Software Developer's Manual Volume 2: Instruction Set Reference.
#include "sandbox/src/sidestep/mini_disassembler.h"
#include "sandbox/src/sidestep/mini_disassembler_types.h"
namespace sidestep {
const ModrmEntry MiniDisassembler::s_ia16_modrm_map_[] = {
// mod == 00
/* r/m == 000 */ { false, false, OS_ZERO },
/* r/m == 001 */ { false, false, OS_ZERO },
/* r/m == 010 */ { false, false, OS_ZERO },
/* r/m == 011 */ { false, false, OS_ZERO },
/* r/m == 100 */ { false, false, OS_ZERO },
/* r/m == 101 */ { false, false, OS_ZERO },
/* r/m == 110 */ { true, false, OS_WORD },
/* r/m == 111 */ { false, false, OS_ZERO },
// mod == 01
/* r/m == 000 */ { true, false, OS_BYTE },
/* r/m == 001 */ { true, false, OS_BYTE },
/* r/m == 010 */ { true, false, OS_BYTE },
/* r/m == 011 */ { true, false, OS_BYTE },
/* r/m == 100 */ { true, false, OS_BYTE },
/* r/m == 101 */ { true, false, OS_BYTE },
/* r/m == 110 */ { true, false, OS_BYTE },
/* r/m == 111 */ { true, false, OS_BYTE },
// mod == 10
/* r/m == 000 */ { true, false, OS_WORD },
/* r/m == 001 */ { true, false, OS_WORD },
/* r/m == 010 */ { true, false, OS_WORD },
/* r/m == 011 */ { true, false, OS_WORD },
/* r/m == 100 */ { true, false, OS_WORD },
/* r/m == 101 */ { true, false, OS_WORD },
/* r/m == 110 */ { true, false, OS_WORD },
/* r/m == 111 */ { true, false, OS_WORD },
// mod == 11
/* r/m == 000 */ { false, false, OS_ZERO },
/* r/m == 001 */ { false, false, OS_ZERO },
/* r/m == 010 */ { false, false, OS_ZERO },
/* r/m == 011 */ { false, false, OS_ZERO },
/* r/m == 100 */ { false, false, OS_ZERO },
/* r/m == 101 */ { false, false, OS_ZERO },
/* r/m == 110 */ { false, false, OS_ZERO },
/* r/m == 111 */ { false, false, OS_ZERO }
};
const ModrmEntry MiniDisassembler::s_ia32_modrm_map_[] = {
// mod == 00
/* r/m == 000 */ { false, false, OS_ZERO },
/* r/m == 001 */ { false, false, OS_ZERO },
/* r/m == 010 */ { false, false, OS_ZERO },
/* r/m == 011 */ { false, false, OS_ZERO },
/* r/m == 100 */ { false, true, OS_ZERO },
/* r/m == 101 */ { true, false, OS_DOUBLE_WORD },
/* r/m == 110 */ { false, false, OS_ZERO },
/* r/m == 111 */ { false, false, OS_ZERO },
// mod == 01
/* r/m == 000 */ { true, false, OS_BYTE },
/* r/m == 001 */ { true, false, OS_BYTE },
/* r/m == 010 */ { true, false, OS_BYTE },
/* r/m == 011 */ { true, false, OS_BYTE },
/* r/m == 100 */ { true, true, OS_BYTE },
/* r/m == 101 */ { true, false, OS_BYTE },
/* r/m == 110 */ { true, false, OS_BYTE },
/* r/m == 111 */ { true, false, OS_BYTE },
// mod == 10
/* r/m == 000 */ { true, false, OS_DOUBLE_WORD },
/* r/m == 001 */ { true, false, OS_DOUBLE_WORD },
/* r/m == 010 */ { true, false, OS_DOUBLE_WORD },
/* r/m == 011 */ { true, false, OS_DOUBLE_WORD },
/* r/m == 100 */ { true, true, OS_DOUBLE_WORD },
/* r/m == 101 */ { true, false, OS_DOUBLE_WORD },
/* r/m == 110 */ { true, false, OS_DOUBLE_WORD },
/* r/m == 111 */ { true, false, OS_DOUBLE_WORD },
// mod == 11
/* r/m == 000 */ { false, false, OS_ZERO },
/* r/m == 001 */ { false, false, OS_ZERO },
/* r/m == 010 */ { false, false, OS_ZERO },
/* r/m == 011 */ { false, false, OS_ZERO },
/* r/m == 100 */ { false, false, OS_ZERO },
/* r/m == 101 */ { false, false, OS_ZERO },
/* r/m == 110 */ { false, false, OS_ZERO },
/* r/m == 111 */ { false, false, OS_ZERO },
};
}; // namespace sidestep
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