/* OpenIDA - Outil d'analyse de fichiers binaires
 * op_movzx.c - décodage des copies d'opérandes avec mise à zéro
 *
 * Copyright (C) 2008 Cyrille Bagard
 *
 *  This file is part of OpenIDA.
 *
 *  OpenIDA is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  OpenIDA is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with Foobar.  If not, see <http://www.gnu.org/licenses/>.
 */


#include <malloc.h>


#include "../instruction-int.h"
#include "opcodes.h"
#include "operand.h"



/******************************************************************************
*                                                                             *
*  Paramètres  : data   = flux de données à analyser.                         *
*                pos    = position courante dans ce flux. [OUT]               *
*                len    = taille totale des données à analyser.               *
*                offset = adresse virtuelle de l'instruction.                 *
*                proc   = architecture ciblée par le désassemblage.           *
*                                                                             *
*  Description : Décode une instruction de type 'movzx' (8 bits).             *
*                                                                             *
*  Retour      : Instruction mise en place ou NULL.                           *
*                                                                             *
*  Remarques   : -                                                            *
*                                                                             *
******************************************************************************/

asm_x86_instr *x86_read_instr_movzx_r1632_rm8(const uint8_t *data, off_t *pos, off_t len, uint64_t offset, const asm_x86_processor *proc)
{
    asm_x86_instr *result;                  /* Instruction à retourner     */
    AsmOperandSize oprsize;                 /* Taille des opérandes        */

    result = (asm_x86_instr *)calloc(1, sizeof(asm_x86_instr));

    /* 0x0f : passage en mode 2 octets */
    (*pos)++;

    oprsize = switch_x86_operand_size_if_needed(proc, data, pos);

    ASM_INSTRUCTION(result)->opcode = data[(*pos)++];

    if (!x86_read_two_operands(result, data, pos, len, X86_OTP_R1632, X86_OTP_RM8, oprsize))
    {
        free(result);
        return NULL;
    }

    return result;

}