src/windows/ia32_modrm_map.cc

/* Copyright (c) 2007, Google Inc.
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 * ---
 * Author: Joi Sigurdsson
 *
 * 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 "mini_disassembler.h"
#include "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