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/* OpenIDA - Outil d'analyse de fichiers binaires
 * instruction.c - gestion des instructions de l'architecture x86
 *
 * Copyright (C) 2009 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 "instruction.h"


#include "operand.h"
#include "../instruction-int.h"
#include "../../common/extstr.h"



/* Définition générique d'une instruction d'architecture x86 (instance) */
struct _GX86Instruction
{
    GArchInstruction parent;                /* A laisser en premier        */

    X86Opcodes type;                        /* Position dans la liste      */

    X86Prefix prefixes;                     /* Préfixes finalement trouvés */

};

/* Définition générique d'une instruction d'architecture x86 (classe) */
struct _GX86InstructionClass
{
    GArchInstructionClass parent;           /* A laisser en premier        */

};


/* Initialise la classe des instructions pour x86. */
static void g_x86_instruction_class_init(GX86InstructionClass *);

/* Initialise une instance d'opérande d'architecture x86. */
static void g_x86_instruction_init(GX86Instruction *);



/* --------------------- AIDE A LA MISE EN PLACE D'INSTRUCTIONS --------------------- */


/* Répertoire de toutes les instructions x86 */
typedef struct _x86_instruction
{
    bool care_of_data;                      /* Devinette = repas ?         */
    bin_t opcode;                           /* Opcode de l'instruction     */
    bin_t op_extension;                     /* Extension de l'opcode       */

    const char *keyword;                    /* Mot clef de la commande     */

    X86Prefix prefix;                       /* Eventuel(s) préfixe(s)      */

} x86_instruction;


#define OPCODE_EXT(eop) ((eop) & 0x38)
#define IDX_TO_EXT(idx) (idx == -1 ? 0xff : idx << 3)


static x86_instruction _instructions[XOP_COUNT] = {

    [XOP_ADD_RM8_R8]            = { false, 0x00, IDX_TO_EXT(-1), "add", XPX_NONE },
    [XOP_ADD_RM1632_R1632]      = { false, 0x01, IDX_TO_EXT(-1), "add", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_ADD_R8_RM8]            = { false, 0x02, IDX_TO_EXT(-1), "add", XPX_NONE },
    [XOP_ADD_R1632_RM1632]      = { false, 0x03, IDX_TO_EXT(-1), "add", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_ADD_AL_IMM8]           = { false, 0x04, IDX_TO_EXT(-1), "add", XPX_NONE },
    [XOP_ADD_E_AX_IMM1632]      = { false, 0x05, IDX_TO_EXT(-1), "add", XPX_OPERAND_SIZE_OVERRIDE },

    [XOP_OR_R8_RM8]             = { false, 0x0a, IDX_TO_EXT(-1), "or", XPX_NONE },
    [XOP_OR_AL_IMM8]            = { false, 0x0c, IDX_TO_EXT(-1), "or", XPX_NONE },


    [XOP_JLE_REL1632]           = { false, 0x8e, IDX_TO_EXT(-1), "jle", XPX_TWO_BYTES | XPX_OPERAND_SIZE_OVERRIDE },


    [XOP_MOVZX_R1632_RM8]       = { false, 0xb6, IDX_TO_EXT(-1), "movzx", XPX_TWO_BYTES | XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_MOVSX_R1632_RM8]       = { false, 0xbe, IDX_TO_EXT(-1), "movsx", XPX_TWO_BYTES | XPX_OPERAND_SIZE_OVERRIDE },


    [XOP_ADC_RM8_R8]            = { false, 0x10, IDX_TO_EXT(-1), "adc", XPX_NONE },

    [XOP_AND_RM8_R8]            = { false, 0x20, IDX_TO_EXT(-1), "and", XPX_NONE },

    [XOP_SUB_RM1632_R1632]      = { false, 0x29, IDX_TO_EXT(-1), "sub", XPX_OPERAND_SIZE_OVERRIDE },

    [XOP_SUB_R8_RM8]            = { false, 0x2a, IDX_TO_EXT(-1), "sub", XPX_NONE },
    [XOP_SUB_AL_IMM8]           = { false, 0x2c, IDX_TO_EXT(-1), "sub", XPX_NONE },

    [XOP_SUB_E_AX_IMM1632]      = { false, 0x2d, IDX_TO_EXT(-1), "sub", XPX_OPERAND_SIZE_OVERRIDE },



    [XOP_XOR_RM8_R8]            = { false, 0x30, IDX_TO_EXT(-1), "xor", XPX_NONE},
    [XOP_XOR_RM1632_R1632]      = { false, 0x31, IDX_TO_EXT(-1), "xor", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_XOR_R8_RM8]            = { false, 0x32, IDX_TO_EXT(-1), "xor", XPX_NONE},
    [XOP_XOR_R1632_RM1632]      = { false, 0x33, IDX_TO_EXT(-1), "xor", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_XOR_AL_IMM8]           = { false, 0x34, IDX_TO_EXT(-1), "xor", XPX_NONE },
    [XOP_XOR_E_AX_IMM1632]      = { false, 0x35, IDX_TO_EXT(-1), "xor", XPX_OPERAND_SIZE_OVERRIDE },





    [XOP_CMP_RM1632_R1632]      = { false, 0x39, IDX_TO_EXT(-1), "cmp", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_INC_E_AX]              = { true, 0x40, IDX_TO_EXT(-1), "inc", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_INC_E_CX]              = { true, 0x41, IDX_TO_EXT(-1), "inc", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_INC_E_DX]              = { true, 0x42, IDX_TO_EXT(-1), "inc", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_INC_E_BX]              = { true, 0x43, IDX_TO_EXT(-1), "inc", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_INC_E_SP]              = { true, 0x44, IDX_TO_EXT(-1), "inc", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_INC_E_BP]              = { true, 0x45, IDX_TO_EXT(-1), "inc", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_INC_E_SI]              = { true, 0x46, IDX_TO_EXT(-1), "inc", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_INC_E_DI]              = { true, 0x47, IDX_TO_EXT(-1), "inc", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_DEC_E_AX]              = { true, 0x48, IDX_TO_EXT(-1), "dec", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_DEC_E_CX]              = { true, 0x49, IDX_TO_EXT(-1), "dec", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_DEC_E_DX]              = { true, 0x4a, IDX_TO_EXT(-1), "dec", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_DEC_E_BX]              = { true, 0x4b, IDX_TO_EXT(-1), "dec", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_DEC_E_SP]              = { true, 0x4c, IDX_TO_EXT(-1), "dec", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_DEC_E_BP]              = { true, 0x4d, IDX_TO_EXT(-1), "dec", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_DEC_E_SI]              = { true, 0x4e, IDX_TO_EXT(-1), "dec", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_DEC_E_DI]              = { true, 0x4f, IDX_TO_EXT(-1), "dec", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_PUSH_E_AX]             = { true, 0x50, IDX_TO_EXT(-1), "push", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_PUSH_E_CX]             = { true, 0x51, IDX_TO_EXT(-1), "push", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_PUSH_E_DX]             = { true, 0x52, IDX_TO_EXT(-1), "push", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_PUSH_E_BX]             = { true, 0x53, IDX_TO_EXT(-1), "push", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_PUSH_E_SP]             = { true, 0x54, IDX_TO_EXT(-1), "push", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_PUSH_E_BP]             = { true, 0x55, IDX_TO_EXT(-1), "push", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_PUSH_E_SI]             = { true, 0x56, IDX_TO_EXT(-1), "push", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_PUSH_E_DI]             = { true, 0x57, IDX_TO_EXT(-1), "push", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_POP_E_AX]              = { true, 0x58, IDX_TO_EXT(-1), "pop", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_POP_E_CX]              = { true, 0x59, IDX_TO_EXT(-1), "pop", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_POP_E_DX]              = { true, 0x5a, IDX_TO_EXT(-1), "pop", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_POP_E_BX]              = { true, 0x5b, IDX_TO_EXT(-1), "pop", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_POP_E_SP]              = { true, 0x5c, IDX_TO_EXT(-1), "pop", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_POP_E_BP]              = { true, 0x5d, IDX_TO_EXT(-1), "pop", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_POP_E_SI]              = { true, 0x5e, IDX_TO_EXT(-1), "pop", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_POP_E_DI]              = { true, 0x5f, IDX_TO_EXT(-1), "pop", XPX_OPERAND_SIZE_OVERRIDE },


    [XOP_PUSH_IMM1632]          = { false, 0x68, IDX_TO_EXT(-1), "push", XPX_OPERAND_SIZE_OVERRIDE },


    [XOP_IMUL_RM1632_IMM8]      = { false, 0x6b, IDX_TO_EXT(-1), "imul", XPX_OPERAND_SIZE_OVERRIDE },


    [XOP_JO_REL8]               = { false, 0x70, IDX_TO_EXT(-1), "jo", XPX_NONE },
    [XOP_JNO_REL8]              = { false, 0x71, IDX_TO_EXT(-1), "jno", XPX_NONE },
    [XOP_JB_REL8]               = { false, 0x72, IDX_TO_EXT(-1), "jb", XPX_NONE },
    [XOP_JNB_REL8]              = { false, 0x73, IDX_TO_EXT(-1), "jnb", XPX_NONE },
    [XOP_JE_REL8]               = { false, 0x74, IDX_TO_EXT(-1), "je", XPX_NONE },
    [XOP_JNE_REL8]              = { false, 0x75, IDX_TO_EXT(-1), "jne", XPX_NONE },
    [XOP_JNA_REL8]              = { false, 0x76, IDX_TO_EXT(-1), "jna", XPX_NONE },
    [XOP_JA_REL8]               = { false, 0x77, IDX_TO_EXT(-1), "ja", XPX_NONE },
    [XOP_JS_REL8]               = { false, 0x78, IDX_TO_EXT(-1), "js", XPX_NONE },
    [XOP_JNS_REL8]              = { false, 0x79, IDX_TO_EXT(-1), "jns", XPX_NONE },
    [XOP_JP_REL8]               = { false, 0x7a, IDX_TO_EXT(-1), "jp", XPX_NONE },
    [XOP_JNP_REL8]              = { false, 0x7b, IDX_TO_EXT(-1), "jnp", XPX_NONE },
    [XOP_JL_REL8]               = { false, 0x7c, IDX_TO_EXT(-1), "jl", XPX_NONE },
    [XOP_JNL_REL8]              = { false, 0x7d, IDX_TO_EXT(-1), "jnl", XPX_NONE },
    [XOP_JNG_REL8]              = { false, 0x7e, IDX_TO_EXT(-1), "jng", XPX_NONE },
    [XOP_JG_REL8]               = { false, 0x7f, IDX_TO_EXT(-1), "jg", XPX_NONE },
    [XOP_ADD_RM8_IMM8]          = { false, 0x80, IDX_TO_EXT(0), "add", XPX_NONE },
    [XOP_OR_RM8_IMM8]           = { false, 0x80, IDX_TO_EXT(1), "or", XPX_NONE },
    [XOP_ADC_RM8_IMM8]          = { false, 0x80, IDX_TO_EXT(2), "adc", XPX_NONE },
    [XOP_SBB_RM8_IMM8]          = { false, 0x80, IDX_TO_EXT(3), "sbb", XPX_NONE },
    [XOP_AND_RM8_IMM8]          = { false, 0x80, IDX_TO_EXT(4), "and", XPX_NONE },
    [XOP_SUB_RM8_IMM8]          = { false, 0x80, IDX_TO_EXT(5), "sub", XPX_NONE },
    [XOP_XOR_RM8_IMM8]          = { false, 0x80, IDX_TO_EXT(6), "xor", XPX_NONE },
    [XOP_CMP_RM8_IMM8]          = { false, 0x80, IDX_TO_EXT(7), "cmp", XPX_NONE },
    [XOP_ADD_RM1632_IMM1632]    = { false, 0x81, IDX_TO_EXT(0), "add", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_OR_RM1632_IMM1632]     = { false, 0x81, IDX_TO_EXT(0), "add", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_ADC_RM1632_IMM1632]    = { false, 0x81, IDX_TO_EXT(2), "adc", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_SBB_RM1632_IMM1632]    = { false, 0x81, IDX_TO_EXT(3), "sbb", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_AND_RM1632_IMM1632]    = { false, 0x81, IDX_TO_EXT(4), "and", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_SUB_RM1632_IMM1632]    = { false, 0x81, IDX_TO_EXT(5), "sub", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_XOR_RM1632_IMM1632]    = { false, 0x81, IDX_TO_EXT(6), "xor", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_CMP_RM1632_IMM1632]    = { false, 0x81, IDX_TO_EXT(7), "cmp", XPX_OPERAND_SIZE_OVERRIDE },



    [XOP_ADD_RM1632_IMM8]       = { false, 0x83, IDX_TO_EXT(0), "add", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_OR_RM1632_IMM8]        = { false, 0x83, IDX_TO_EXT(1), "or", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_ADC_RM1632_IMM8]       = { false, 0x83, IDX_TO_EXT(2), "adc", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_SBB_RM1632_IMM8]       = { false, 0x83, IDX_TO_EXT(3), "sbb", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_AND_RM1632_IMM8]       = { false, 0x83, IDX_TO_EXT(4), "and", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_SUB_RM1632_IMM8]       = { false, 0x83, IDX_TO_EXT(5), "sub", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_XOR_RM1632_IMM8]       = { false, 0x83, IDX_TO_EXT(6), "xor", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_CMP_RM1632_IMM8]       = { false, 0x83, IDX_TO_EXT(7), "cmp", XPX_OPERAND_SIZE_OVERRIDE },


    [XOP_TEST_RM8_R8]           = { false, 0x84, IDX_TO_EXT(-1), "test", XPX_NONE },
    [XOP_TEST_RM1632_R1632]     = { false, 0x85, IDX_TO_EXT(-1), "test", XPX_OPERAND_SIZE_OVERRIDE },

    [XOP_MOV_RM8_R8]            = { false, 0x88, IDX_TO_EXT(-1), "mov", XPX_NONE },
    [XOP_MOV_RM1632_R1632]      = { false, 0x89, IDX_TO_EXT(-1), "mov", XPX_OPERAND_SIZE_OVERRIDE },


    [XOP_MOV_R1632_RM1632]      = { false, 0x8b, IDX_TO_EXT(-1), "mov", XPX_OPERAND_SIZE_OVERRIDE },


    [XOP_LEA_R1632_M]           = { false, 0x8d, IDX_TO_EXT(-1), "lea", XPX_OPERAND_SIZE_OVERRIDE },


    [XOP_NOP]                   = { false, 0x90, IDX_TO_EXT(-1), "nop", XPX_NONE },
    [XOP_XCHG_R1632_E_AX]       = { true, 0x90, IDX_TO_EXT(-1), "xchg", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_XCHG_R1632_E_CX]       = { true, 0x91, IDX_TO_EXT(-1), "xchg", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_XCHG_R1632_E_DX]       = { true, 0x92, IDX_TO_EXT(-1), "xchg", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_XCHG_R1632_E_BX]       = { true, 0x93, IDX_TO_EXT(-1), "xchg", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_XCHG_R1632_E_SP]       = { true, 0x94, IDX_TO_EXT(-1), "xchg", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_XCHG_R1632_E_BP]       = { true, 0x95, IDX_TO_EXT(-1), "xchg", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_XCHG_R1632_E_SI]       = { true, 0x96, IDX_TO_EXT(-1), "xchg", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_XCHG_R1632_E_DI]       = { true, 0x97, IDX_TO_EXT(-1), "xchg", XPX_OPERAND_SIZE_OVERRIDE },



    [XOP_MOV_AL_MOFFS8]         = { false, 0xa0, IDX_TO_EXT(-1), "mov", XPX_NONE },
    [XOP_MOV_E_AX_MOFFS1632]    = { false, 0xa1, IDX_TO_EXT(-1), "mov", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_MOV_MOFFS8_AL]         = { false, 0xa2, IDX_TO_EXT(-1), "mov", XPX_NONE },
    [XOP_MOV_MOFFS1632_E_AX]    = { false, 0xa3, IDX_TO_EXT(-1), "mov", XPX_OPERAND_SIZE_OVERRIDE },


    [XOP_TEST_AL_IMM8]          = { false, 0xa8, IDX_TO_EXT(-1), "test", XPX_NONE },
    [XOP_TEST_E_AX_IMM1632]     = { false, 0xa9, IDX_TO_EXT(-1), "test", XPX_OPERAND_SIZE_OVERRIDE },


    [XOP_SCAS_AL_M8]            = { false, 0xae, IDX_TO_EXT(-1), "scas", XPX_NONE },


    [XOP_MOV_AL_IMM8]           = { true, 0xb0, IDX_TO_EXT(-1), "mov", XPX_NONE },
    [XOP_MOV_CL_IMM8]           = { true, 0xb1, IDX_TO_EXT(-1), "mov", XPX_NONE },
    [XOP_MOV_DL_IMM8]           = { true, 0xb2, IDX_TO_EXT(-1), "mov", XPX_NONE },
    [XOP_MOV_BL_IMM8]           = { true, 0xb3, IDX_TO_EXT(-1), "mov", XPX_NONE },
    [XOP_MOV_AH_IMM8]           = { true, 0xb4, IDX_TO_EXT(-1), "mov", XPX_NONE },
    [XOP_MOV_CH_IMM8]           = { true, 0xb5, IDX_TO_EXT(-1), "mov", XPX_NONE },
    [XOP_MOV_DH_IMM8]           = { true, 0xb6, IDX_TO_EXT(-1), "mov", XPX_NONE },
    [XOP_MOV_BH_IMM8]           = { true, 0xb7, IDX_TO_EXT(-1), "mov", XPX_NONE },
    [XOP_MOV_E_AX_IMM1632]      = { true, 0xb8, IDX_TO_EXT(-1), "mov", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_MOV_E_CX_IMM1632]      = { true, 0xb9, IDX_TO_EXT(-1), "mov", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_MOV_E_DX_IMM1632]      = { true, 0xba, IDX_TO_EXT(-1), "mov", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_MOV_E_BX_IMM1632]      = { true, 0xbb, IDX_TO_EXT(-1), "mov", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_MOV_E_SP_IMM1632]      = { true, 0xbc, IDX_TO_EXT(-1), "mov", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_MOV_E_BP_IMM1632]      = { true, 0xbd, IDX_TO_EXT(-1), "mov", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_MOV_E_SI_IMM1632]      = { true, 0xbe, IDX_TO_EXT(-1), "mov", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_MOV_E_DI_IMM1632]      = { true, 0xbf, IDX_TO_EXT(-1), "mov", XPX_OPERAND_SIZE_OVERRIDE },



    [XOP_ROL_RM1632_IMM8]       = { false, 0xc1, IDX_TO_EXT(0), "rol", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_ROR_RM1632_IMM8]       = { false, 0xc1, IDX_TO_EXT(1), "ror", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_RCL_RM1632_IMM8]       = { false, 0xc1, IDX_TO_EXT(2), "rcl", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_RCR_RM1632_IMM8]       = { false, 0xc1, IDX_TO_EXT(3), "rcr", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_SHL_RM1632_IMM8]       = { false, 0xc1, IDX_TO_EXT(4), "shl", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_SHR_RM1632_IMM8]       = { false, 0xc1, IDX_TO_EXT(5), "shr", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_SAL_RM1632_IMM8]       = { false, 0xc1, IDX_TO_EXT(6), "sal", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_SAR_RM1632_IMM8]       = { false, 0xc1, IDX_TO_EXT(7), "sar", XPX_OPERAND_SIZE_OVERRIDE },


    [XOP_RET]                   = { false, 0xc3, IDX_TO_EXT(-1), "ret", XPX_NONE },


    [XOP_MOV_RM8_IMM8]          = { false, 0xc6, IDX_TO_EXT(0), "mov", XPX_NONE },
    [XOP_MOV_RM1632_IMM1632]    = { false, 0xc7, IDX_TO_EXT(0), "mov", XPX_OPERAND_SIZE_OVERRIDE },



    [XOP_LEAVE]                 = { false, 0xc9, IDX_TO_EXT(-1), "leave", XPX_NONE },


    [XOP_INT_3]                 = { false, 0xcc, IDX_TO_EXT(-1), "int", XPX_NONE },
    [XOP_INT]                   = { false, 0xcd, IDX_TO_EXT(-1), "int", XPX_NONE },


    [XOP_SHL_RM1632_CL]         = { false, 0xd3, IDX_TO_EXT(4), "shl", XPX_OPERAND_SIZE_OVERRIDE },


    [XOP_CALL_REL1632]          = { false, 0xe8, IDX_TO_EXT(-1), "call", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_JMP_REL1632]           = { false, 0xe9, IDX_TO_EXT(-1), "jmp", XPX_OPERAND_SIZE_OVERRIDE },

    [XOP_JMP_REL8]              = { false, 0xeb, IDX_TO_EXT(-1), "jmp", XPX_NONE },

    [XOP_HLT]                   = { false, 0xf4, IDX_TO_EXT(-1), "hlt", XPX_NONE },


    [XOP_TEST_RM1632_IMM1632]   = { false, 0xf7, IDX_TO_EXT(0), "test", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_TEST_RM1632_IMM1632_BIS] = { false, 0xf7, IDX_TO_EXT(1), "test", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_NOT_RM1632]            = { false, 0xf7, IDX_TO_EXT(2), "not", XPX_OPERAND_SIZE_OVERRIDE },

    [XOP_IMUL_RM1632]           = { false, 0xf7, IDX_TO_EXT(5), "imul", XPX_OPERAND_SIZE_OVERRIDE },


    [XOP_CLD]                   = { false, 0xfc, IDX_TO_EXT(-1), "cld", XPX_NONE },

    [XOP_CALL_RM1632]           = { false, 0xff, IDX_TO_EXT(2), "call", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_JMP_RM1632]            = { false, 0xff, IDX_TO_EXT(4), "jmp", XPX_OPERAND_SIZE_OVERRIDE },
    [XOP_PUSH_RM1632]           = { false, 0xff, IDX_TO_EXT(6), "push", XPX_OPERAND_SIZE_OVERRIDE }

};





/* Traduit une instruction en version humainement lisible. */
static const char *x86_get_instruction_text(const GX86Instruction *, const exe_format *, AsmSyntax);

/* Informe sur une éventuelle référence à une autre instruction. */
static InstructionLinkType x86_get_instruction_link(const GX86Instruction *, vmpa_t *);

/* Indique si l'instruction correspond à un retour de fonction. */
static bool x86_instruction_is_return(const GX86Instruction *);



/* Indique le type défini pour une instruction d'architecture x86. */
G_DEFINE_TYPE(GX86Instruction, g_x86_instruction, G_TYPE_ARCH_INSTRUCTION);



/******************************************************************************
*                                                                             *
*  Paramètres  : klass = classe à initialiser.                                *
*                                                                             *
*  Description : Initialise la classe des instructions pour x86.              *
*                                                                             *
*  Retour      : -                                                            *
*                                                                             *
*  Remarques   : -                                                            *
*                                                                             *
******************************************************************************/

static void g_x86_instruction_class_init(GX86InstructionClass *klass)
{

}


/******************************************************************************
*                                                                             *
*  Paramètres  : instr = instance à initialiser.                              *
*                                                                             *
*  Description : Initialise une instance d'instruction d'architecture x86.    *
*                                                                             *
*  Retour      : -                                                            *
*                                                                             *
*  Remarques   : -                                                            *
*                                                                             *
******************************************************************************/

static void g_x86_instruction_init(GX86Instruction *instr)
{
    GArchInstruction *parent;               /* Instance parente            */

    parent = G_ARCH_INSTRUCTION(instr);

    parent->get_text = (get_instruction_text_fc)x86_get_instruction_text;
    parent->get_link = (get_instruction_link_fc)x86_get_instruction_link;
    parent->is_return = (is_instruction_return_fc)x86_instruction_is_return;

}


/******************************************************************************
*                                                                             *
*  Paramètres  : type = type d'instruction à représenter.                     *
*                                                                             *
*  Description : Crée une instruction pour l'architecture x86.                *
*                                                                             *
*  Retour      : Architecture mise en place.                                  *
*                                                                             *
*  Remarques   : -                                                            *
*                                                                             *
******************************************************************************/

GArchInstruction *g_x86_instruction_new(X86Opcodes type)
{
    GArchInstruction *result;               /* Structure à retourner       */

    result = g_object_new(G_TYPE_X86_INSTRUCTION, NULL);

    G_X86_INSTRUCTION(result)->type = type;

    return result;

}


/******************************************************************************
*                                                                             *
*  Paramètres  : instr = instruction à consulter.                             *
*                                                                             *
*  Description : Fournit l'identifiant de l'opcode représenté.                *
*                                                                             *
*  Retour      : -                                                            *
*                                                                             *
*  Remarques   : -                                                            *
*                                                                             *
******************************************************************************/

X86Opcodes g_x86_instruction_get_opcode(const GX86Instruction *instr)
{
    return instr->type;

}


/******************************************************************************
*                                                                             *
*  Paramètres  : instr    = instruction à venir compléter.                    *
*                prefixes = listes des préfixes rencontrés.                   *
*                                                                             *
*  Description : Attache à une instructions ses préfixes associés.            *
*                                                                             *
*  Retour      : -                                                            *
*                                                                             *
*  Remarques   : -                                                            *
*                                                                             *
******************************************************************************/

void g_x86_instruction_set_prefixes(GX86Instruction *instr, X86Prefix prefixes)
{
    instr->prefixes = prefixes;

}



/* ---------------------------------------------------------------------------------- */
/*                       AIDE A LA MISE EN PLACE D'INSTRUCTIONS                       */
/* ---------------------------------------------------------------------------------- */


/******************************************************************************
*                                                                             *
*  Paramètres  : data   = flux de données à analyser.                         *
*                pos    = position courante dans ce flux.                     *
*                len    = taille totale des données à analyser.               *
*                prefix = éventuel(s) préfixe(s) remarqué(s). [OUT]           *
*                care   = la lecture de l'instr. veut-elle les opcodes ? [OUT]*
*                                                                             *
*  Description : Recherche l'identifiant de la prochaine instruction.         *
*                                                                             *
*  Retour      : Identifiant de la prochaine instruction à tenter de charger. *
*                                                                             *
*  Remarques   : -                                                            *
*                                                                             *
******************************************************************************/

X86Opcodes x86_guess_next_instruction(const bin_t *data, off_t pos, off_t len, X86Prefix *prefix, bool *care)
{
    X86Opcodes result;                      /* Identifiant à retourner     */
    X86Prefix extra;                        /* Préfixes n'intervenant pas  */
    bin_t opcode;                           /* Opcode à trouver            */

    extra = XPX_NONE;
    *prefix = XPX_NONE;

    while (pos < len)
        switch (data[pos])
        {
            case 0x0f:
                pos++;
                *prefix |= XPX_TWO_BYTES;
                break;
            case 0x66:
                pos++;
                *prefix |= XPX_OPERAND_SIZE_OVERRIDE;
                break;
            case 0xf2:
                pos++;
                extra |= XPX_REPEAT_STRING_OPERATION;
                break;
            default:
                goto xgni_look_for;
                break;
        }

 xgni_look_for:

    if (pos == len) return XOP_COUNT;

    opcode = data[pos];

    for (result = 0; result < XOP_COUNT; result++)
    {
        if ((_instructions[result].prefix & *prefix) != *prefix) continue;

        if (_instructions[result].opcode != opcode) continue;

        if (_instructions[result].op_extension != IDX_TO_EXT(-1))
        {
            if ((pos + 1) == len) continue;
            if (_instructions[result].op_extension != OPCODE_EXT(data[pos + 1])) continue;
        }

        *prefix |= extra;
        *care = _instructions[result].care_of_data;
        break;

    }

    return result;

}


/******************************************************************************
*                                                                             *
*  Paramètres  : instr  = instruction à traiter.                              *
*                format = format du binaire manipulé.                         *
*                syntax = type de représentation demandée.                    *
*                                                                             *
*  Description : Traduit une instruction en version humainement lisible.      *
*                                                                             *
*  Retour      : Chaîne de caractères à libérer de la mémoire.                *
*                                                                             *
*  Remarques   : -                                                            *
*                                                                             *
******************************************************************************/

static const char *x86_get_instruction_text(const GX86Instruction *instr, const exe_format *format, AsmSyntax syntax)
{
    const char *result;                     /* Chaîne à retourner          */

    result = strdup(_instructions[instr->type].keyword);

    if (instr->prefixes & XPX_REPEAT_STRING_OPERATION)
        result = strprep(result, "repnz ");

    return result;

}


/******************************************************************************
*                                                                             *
*  Paramètres  : instr = instruction à consulter.                             *
*                addr  = eventuelle adresse associée à faire connaître. [OUT] *
*                                                                             *
*  Description : Informe sur une éventuelle référence à une autre instruction.*
*                                                                             *
*  Retour      : Type de lien trouvé ou ILT_NONE si aucun.                    *
*                                                                             *
*  Remarques   : -                                                            *
*                                                                             *
******************************************************************************/

static InstructionLinkType x86_get_instruction_link(const GX86Instruction *instr, vmpa_t *addr)
{
    InstructionLinkType result;             /* Type de lien à retourner    */
    const GX86RelativeOperand *relative;    /* Adresse relative            */

    switch (instr->type)
    {
        case XOP_JLE_REL1632:
            relative = G_X86_RELATIVE_OPERAND(g_arch_instruction_get_operand(G_ARCH_INSTRUCTION(instr), 0));
            if (g_imm_operand_to_vmpa_t(g_x86_relative_operand_get_value(relative), addr)) result = ILT_JUMP_IF_TRUE;
            else result = ILT_NONE;
            break;

        case XOP_JO_REL8:
        case XOP_JNO_REL8:
        case XOP_JB_REL8:
        case XOP_JNB_REL8:
        case XOP_JE_REL8:
        case XOP_JNE_REL8:
        case XOP_JNA_REL8:
        case XOP_JA_REL8:
        case XOP_JS_REL8:
        case XOP_JNS_REL8:
        case XOP_JP_REL8:
        case XOP_JNP_REL8:
        case XOP_JL_REL8:
        case XOP_JNL_REL8:
        case XOP_JNG_REL8:
        case XOP_JG_REL8:
            relative = G_X86_RELATIVE_OPERAND(g_arch_instruction_get_operand(G_ARCH_INSTRUCTION(instr), 0));
            if (g_imm_operand_to_vmpa_t(g_x86_relative_operand_get_value(relative), addr)) result = ILT_JUMP_IF_TRUE;
            else result = ILT_NONE;
            break;

        case XOP_CALL_REL1632:
            relative = G_X86_RELATIVE_OPERAND(g_arch_instruction_get_operand(G_ARCH_INSTRUCTION(instr), 0));
            if (g_imm_operand_to_vmpa_t(g_x86_relative_operand_get_value(relative), addr)) result = ILT_CALL;
            else result = ILT_NONE;
            break;

        case XOP_JMP_REL1632:
            relative = G_X86_RELATIVE_OPERAND(g_arch_instruction_get_operand(G_ARCH_INSTRUCTION(instr), 0));
            if (g_imm_operand_to_vmpa_t(g_x86_relative_operand_get_value(relative), addr)) result = ILT_JUMP;
            else result = ILT_NONE;
            break;

        case XOP_JMP_REL8:
            relative = G_X86_RELATIVE_OPERAND(g_arch_instruction_get_operand(G_ARCH_INSTRUCTION(instr), 0));
            if (g_imm_operand_to_vmpa_t(g_x86_relative_operand_get_value(relative), addr)) result = ILT_JUMP;
            else result = ILT_NONE;
            break;

        default:
            result = ILT_NONE;
            break;

    }

    return result;

}


/******************************************************************************
*                                                                             *
*  Paramètres  : instr = instruction à consulter.                             *
*                                                                             *
*  Description : Indique si l'instruction correspond à un retour de fonction. *
*                                                                             *
*  Retour      : true si l'instruction est un 'return' quelconque ou false.   *
*                                                                             *
*  Remarques   : -                                                            *
*                                                                             *
******************************************************************************/

static bool x86_instruction_is_return(const GX86Instruction *instr)
{
    return (instr->type == XOP_RET);

}