/* OpenIDA - Outil d'analyse de fichiers binaires
* op_lea.c - décodage des chargements d'adresse effective
*
* 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 .
*/
#include
#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 'lea' (16 ou 32 bits). *
* *
* Retour : Instruction mise en place ou NULL. *
* *
* Remarques : - *
* *
******************************************************************************/
asm_x86_instr *x86_read_instr_lea(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 */
asm_x86_operand *reg1; /* Registre de destination */
asm_x86_operand *reg2; /* Registre de source */
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)++];
reg1 = x86_create_reg1632_operand_from_modrm(data[*pos], oprsize == AOS_32_BITS, false);
if (reg1 == NULL)
{
free(result);
return NULL;
}
reg2 = x86_create_content1632_operand(data, pos, len, oprsize == AOS_32_BITS, true);
if (reg2 == NULL)
{
free(result);
free(reg1);
return NULL;
}
ASM_INSTRUCTION(result)->operands = (asm_operand **)calloc(2, sizeof(asm_operand *));
ASM_INSTRUCTION(result)->operands_count = 2;
ASM_INSTRUCTION(result)->operands[0] = ASM_OPERAND(reg1);
ASM_INSTRUCTION(result)->operands[1] = ASM_OPERAND(reg2);
return result;
}