michael@0: // Copyright (c) 2012 The Chromium Authors. All rights reserved.
michael@0: // Use of this source code is governed by a BSD-style license that can be
michael@0: // found in the LICENSE file.
michael@0: 
michael@0: // Table of relevant information about how to decode the ModR/M byte.
michael@0: // Based on information in the IA-32 Intel Architecture
michael@0: // Software Developer's Manual Volume 2: Instruction Set Reference.
michael@0: 
michael@0: #include "sandbox/win/src/sidestep/mini_disassembler.h"
michael@0: #include "sandbox/win/src/sidestep/mini_disassembler_types.h"
michael@0: 
michael@0: namespace sidestep {
michael@0: 
michael@0: const ModrmEntry MiniDisassembler::s_ia16_modrm_map_[] = {
michael@0: // mod == 00
michael@0:   /* r/m == 000 */ { false, false, OS_ZERO },
michael@0:   /* r/m == 001 */ { false, false, OS_ZERO },
michael@0:   /* r/m == 010 */ { false, false, OS_ZERO },
michael@0:   /* r/m == 011 */ { false, false, OS_ZERO },
michael@0:   /* r/m == 100 */ { false, false, OS_ZERO },
michael@0:   /* r/m == 101 */ { false, false, OS_ZERO },
michael@0:   /* r/m == 110 */ { true, false, OS_WORD },
michael@0:   /* r/m == 111 */ { false, false, OS_ZERO },
michael@0: // mod == 01
michael@0:   /* r/m == 000 */ { true, false, OS_BYTE },
michael@0:   /* r/m == 001 */ { true, false, OS_BYTE },
michael@0:   /* r/m == 010 */ { true, false, OS_BYTE },
michael@0:   /* r/m == 011 */ { true, false, OS_BYTE },
michael@0:   /* r/m == 100 */ { true, false, OS_BYTE },
michael@0:   /* r/m == 101 */ { true, false, OS_BYTE },
michael@0:   /* r/m == 110 */ { true, false, OS_BYTE },
michael@0:   /* r/m == 111 */ { true, false, OS_BYTE },
michael@0: // mod == 10
michael@0:   /* r/m == 000 */ { true, false, OS_WORD },
michael@0:   /* r/m == 001 */ { true, false, OS_WORD },
michael@0:   /* r/m == 010 */ { true, false, OS_WORD },
michael@0:   /* r/m == 011 */ { true, false, OS_WORD },
michael@0:   /* r/m == 100 */ { true, false, OS_WORD },
michael@0:   /* r/m == 101 */ { true, false, OS_WORD },
michael@0:   /* r/m == 110 */ { true, false, OS_WORD },
michael@0:   /* r/m == 111 */ { true, false, OS_WORD },
michael@0: // mod == 11
michael@0:   /* r/m == 000 */ { false, false, OS_ZERO },
michael@0:   /* r/m == 001 */ { false, false, OS_ZERO },
michael@0:   /* r/m == 010 */ { false, false, OS_ZERO },
michael@0:   /* r/m == 011 */ { false, false, OS_ZERO },
michael@0:   /* r/m == 100 */ { false, false, OS_ZERO },
michael@0:   /* r/m == 101 */ { false, false, OS_ZERO },
michael@0:   /* r/m == 110 */ { false, false, OS_ZERO },
michael@0:   /* r/m == 111 */ { false, false, OS_ZERO }
michael@0: };
michael@0: 
michael@0: const ModrmEntry MiniDisassembler::s_ia32_modrm_map_[] = {
michael@0: // mod == 00
michael@0:   /* r/m == 000 */ { false, false, OS_ZERO },
michael@0:   /* r/m == 001 */ { false, false, OS_ZERO },
michael@0:   /* r/m == 010 */ { false, false, OS_ZERO },
michael@0:   /* r/m == 011 */ { false, false, OS_ZERO },
michael@0:   /* r/m == 100 */ { false, true, OS_ZERO },
michael@0:   /* r/m == 101 */ { true, false, OS_DOUBLE_WORD },
michael@0:   /* r/m == 110 */ { false, false, OS_ZERO },
michael@0:   /* r/m == 111 */ { false, false, OS_ZERO },
michael@0: // mod == 01
michael@0:   /* r/m == 000 */ { true, false, OS_BYTE },
michael@0:   /* r/m == 001 */ { true, false, OS_BYTE },
michael@0:   /* r/m == 010 */ { true, false, OS_BYTE },
michael@0:   /* r/m == 011 */ { true, false, OS_BYTE },
michael@0:   /* r/m == 100 */ { true, true, OS_BYTE },
michael@0:   /* r/m == 101 */ { true, false, OS_BYTE },
michael@0:   /* r/m == 110 */ { true, false, OS_BYTE },
michael@0:   /* r/m == 111 */ { true, false, OS_BYTE },
michael@0: // mod == 10
michael@0:   /* r/m == 000 */ { true, false, OS_DOUBLE_WORD },
michael@0:   /* r/m == 001 */ { true, false, OS_DOUBLE_WORD },
michael@0:   /* r/m == 010 */ { true, false, OS_DOUBLE_WORD },
michael@0:   /* r/m == 011 */ { true, false, OS_DOUBLE_WORD },
michael@0:   /* r/m == 100 */ { true, true, OS_DOUBLE_WORD },
michael@0:   /* r/m == 101 */ { true, false, OS_DOUBLE_WORD },
michael@0:   /* r/m == 110 */ { true, false, OS_DOUBLE_WORD },
michael@0:   /* r/m == 111 */ { true, false, OS_DOUBLE_WORD },
michael@0: // mod == 11
michael@0:   /* r/m == 000 */ { false, false, OS_ZERO },
michael@0:   /* r/m == 001 */ { false, false, OS_ZERO },
michael@0:   /* r/m == 010 */ { false, false, OS_ZERO },
michael@0:   /* r/m == 011 */ { false, false, OS_ZERO },
michael@0:   /* r/m == 100 */ { false, false, OS_ZERO },
michael@0:   /* r/m == 101 */ { false, false, OS_ZERO },
michael@0:   /* r/m == 110 */ { false, false, OS_ZERO },
michael@0:   /* r/m == 111 */ { false, false, OS_ZERO },
michael@0: };
michael@0: 
michael@0: };  // namespace sidestep