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/* OpenIDA - Outil d'analyse de fichiers binaires
* op_dec.c - décodage des décrémentations
*
* 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 'dec' (16 ou 32 bits). *
* *
* Retour : Instruction mise en place ou NULL. *
* *
* Remarques : - *
* *
******************************************************************************/
asm_x86_instr *x86_read_instr_dec_r1632(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));
oprsize = switch_x86_operand_size_if_needed(proc, data, pos);
ASM_INSTRUCTION(result)->opcode = data[*pos];
if (!x86_read_one_operand(result, data, pos, len, X86_OTP_OP_R1632, oprsize, 0x48))
{
free(result);
return NULL;
}
return result;
}
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