/* OpenIDA - Outil d'analyse de fichiers binaires
* registers.c - aides auxiliaires relatives aux registres 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 .
*/
#include "registers.h"
#include
#include
/* Liste des registres 8 bits */
typedef enum _X868bRegister
{
X86_REG8_AL = 0, /* Registre AL */
X86_REG8_CL = 1, /* Registre AL */
X86_REG8_DL = 2, /* Registre AL */
X86_REG8_BL = 3, /* Registre AL */
X86_REG8_AH = 4, /* Registre AH */
X86_REG8_CH = 5, /* Registre AH */
X86_REG8_DH = 6, /* Registre AH */
X86_REG8_BH = 7, /* Registre AH */
X86_REG8_NONE /* Aucun registre */
} X868bRegister;
/* Liste des registres 16 bits */
typedef enum _X8616bRegister
{
X86_REG16_AX = 0, /* Registre AX */
X86_REG16_CX = 1, /* Registre AX */
X86_REG16_DX = 2, /* Registre AX */
X86_REG16_BX = 3, /* Registre AX */
X86_REG16_SP = 4, /* Registre SP */
X86_REG16_BP = 5, /* Registre BP */
X86_REG16_SI = 6, /* Registre SI */
X86_REG16_DI = 7, /* Registre DI */
X86_REG16_NONE /* Aucun registre */
} X8616bRegister;
/* Liste des registres 32 bits */
typedef enum _X8632bRegister
{
X86_REG32_EAX = 0, /* Registre EAX */
X86_REG32_ECX = 1, /* Registre EAX */
X86_REG32_EDX = 2, /* Registre EAX */
X86_REG32_EBX = 3, /* Registre EAX */
X86_REG32_ESP = 4, /* Registre ESP */
X86_REG32_EBP = 5, /* Registre EBP */
X86_REG32_ESI = 6, /* Registre ESI */
X86_REG32_EDI = 7, /* Registre EDI */
X86_REG32_NONE /* Aucun registre */
} X8632bRegister;
/* Registre x86 */
struct _x86_register
{
union
{
X868bRegister reg8; /* Registre 8 bits */
X8616bRegister reg16; /* Registre 16 bits */
X8632bRegister reg32; /* Registre 32 bits */
} reg;
AsmOperandSize size; /* Taille de ce registre */
};
/******************************************************************************
* *
* Paramètres : size = indique la taille du registre. *
* value = valeur correspondant au registre. *
* *
* Description : Récupère l'indentifiant interne d'un registre. *
* *
* Retour : Registre définit ou NULL. *
* *
* Remarques : - *
* *
******************************************************************************/
x86_register *get_x86_register(AsmOperandSize size, bin_t value)
{
x86_register *result; /* Représentation à renvoyer */
result = (x86_register *)calloc(1, sizeof(x86_register));
result->size = size;
switch (size)
{
case AOS_8_BITS:
switch (value)
{
case 0 ... 7:
result->reg.reg8 = (X868bRegister)value;
break;
default:
goto gxr_error;
break;
}
break;
case AOS_16_BITS:
switch (value)
{
case 0 ... 7:
result->reg.reg16 = (X8616bRegister)value;
break;
default:
goto gxr_error;
break;
}
break;
case AOS_32_BITS:
switch (value)
{
case 0 ... 7:
result->reg.reg32 = (X8632bRegister)value;
break;
default:
goto gxr_error;
break;
}
break;
default:
goto gxr_error;
break;
}
return result;
gxr_error:
free(result);
return NULL;
}
/******************************************************************************
* *
* Paramètres : reg = registre à supprimer. *
* *
* Description : Efface de la mémoire l'indentifiant interne d'un registre. *
* *
* Retour : - *
* *
* Remarques : - *
* *
******************************************************************************/
void free_x86_register(x86_register *reg)
{
free(reg);
}
/******************************************************************************
* *
* Paramètres : reg = registre à consulter. *
* *
* Description : Indique si le registre correspond à ebp ou similaire. *
* *
* Retour : true si la correspondance est avérée, false sinon. *
* *
* Remarques : - *
* *
******************************************************************************/
bool is_x86_register_base_pointer(const x86_register *reg)
{
bool result; /* Bilan à remonter */
switch (reg->size)
{
case AOS_8_BITS_UNSIGNED:
case AOS_8_BITS_SIGNED:
result = (reg->reg.reg8 == X86_REG8_CH);
break;
case AOS_16_BITS_UNSIGNED:
case AOS_16_BITS_SIGNED:
result = (reg->reg.reg16 == X86_REG16_BP);
break;
case AOS_32_BITS_UNSIGNED:
case AOS_32_BITS_SIGNED:
result = (reg->reg.reg32 == X86_REG32_EBP);
break;
/*
case AOS_64_BITS_UNSIGNED:
case AOS_64_BITS_SIGNED:
result = (reg->reg.reg8 == X86_REG8_CH);
break;
*/
default:
result = false;
}
return result;
}
/******************************************************************************
* *
* Paramètres : reg = registre à consulter. *
* *
* Description : Indique si le registre correspond à esp ou similaire. *
* *
* Retour : true si la correspondance est avérée, false sinon. *
* *
* Remarques : - *
* *
******************************************************************************/
bool is_x86_register_stack_pointer(const x86_register *reg)
{
bool result; /* Bilan à remonter */
switch (reg->size)
{
case AOS_8_BITS_UNSIGNED:
case AOS_8_BITS_SIGNED:
result = (reg->reg.reg8 == X86_REG8_AH);
break;
case AOS_16_BITS_UNSIGNED:
case AOS_16_BITS_SIGNED:
result = (reg->reg.reg16 == X86_REG16_SP);
break;
case AOS_32_BITS_UNSIGNED:
case AOS_32_BITS_SIGNED:
result = (reg->reg.reg32 == X86_REG32_ESP);
break;
/*
case AOS_64_BITS_UNSIGNED:
case AOS_64_BITS_SIGNED:
result = (reg->reg.reg8 == X86_REG8_CH);
break;
*/
default:
result = false;
}
return result;
}
/******************************************************************************
* *
* Paramètres : reg = registre à imprimer. *
* syntax = type de représentation demandée. *
* *
* Description : Traduit un registre x86 en texte. *
* *
* Retour : Traduction en chaîne à libérer de la mémoire. *
* *
* Remarques : - *
* *
******************************************************************************/
char *x86_register_as_text(const x86_register *reg, AsmSyntax syntax)
{
char *result; /* Chaîne à renvoyer */
result = (char *)calloc(5, sizeof(char));
switch (syntax)
{
case ASX_INTEL:
switch (reg->size)
{
case AOS_8_BITS:
switch (reg->reg.reg8)
{
case X86_REG8_AL:
snprintf(result, 5, "al");
break;
case X86_REG8_CL:
snprintf(result, 5, "cl");
break;
case X86_REG8_DL:
snprintf(result, 5, "dl");
break;
case X86_REG8_BL:
snprintf(result, 5, "bl");
break;
case X86_REG8_AH:
snprintf(result, 5, "ah");
break;
case X86_REG8_CH:
snprintf(result, 5, "ch");
break;
case X86_REG8_DH:
snprintf(result, 5, "dh");
break;
case X86_REG8_BH:
snprintf(result, 5, "bh");
break;
case X86_REG8_NONE:
/* Ne devrait jamais arriver */
break;
}
break;
case AOS_16_BITS:
switch (reg->reg.reg16)
{
case X86_REG16_AX:
snprintf(result, 5, "ax");
break;
case X86_REG16_CX:
snprintf(result, 5, "cx");
break;
case X86_REG16_DX:
snprintf(result, 5, "dx");
break;
case X86_REG16_BX:
snprintf(result, 5, "bx");
break;
case X86_REG16_SP:
snprintf(result, 5, "sp");
break;
case X86_REG16_BP:
snprintf(result, 5, "bp");
break;
case X86_REG16_SI:
snprintf(result, 5, "si");
break;
case X86_REG16_DI:
snprintf(result, 5, "di");
break;
case X86_REG16_NONE:
/* Ne devrait jamais arriver */
break;
}
break;
case AOS_32_BITS:
switch (reg->reg.reg32)
{
case X86_REG32_EAX:
snprintf(result, 5, "eax");
break;
case X86_REG32_ECX:
snprintf(result, 5, "ecx");
break;
case X86_REG32_EDX:
snprintf(result, 5, "edx");
break;
case X86_REG32_EBX:
snprintf(result, 5, "ebx");
break;
case X86_REG32_ESP:
snprintf(result, 5, "esp");
break;
case X86_REG32_EBP:
snprintf(result, 5, "ebp");
break;
case X86_REG32_ESI:
snprintf(result, 5, "esi");
break;
case X86_REG32_EDI:
snprintf(result, 5, "edi");
break;
case X86_REG32_NONE:
printf("null reg\n");
/* Ne devrait jamais arriver */
break;
}
break;
default:
break;
}
break;
case ASX_ATT:
switch (reg->size)
{
case AOS_8_BITS:
switch (reg->reg.reg8)
{
case X86_REG8_AL:
snprintf(result, 5, "%%al");
break;
case X86_REG8_CL:
snprintf(result, 5, "%%cl");
break;
case X86_REG8_DL:
snprintf(result, 5, "%%dl");
break;
case X86_REG8_BL:
snprintf(result, 5, "%%bl");
break;
case X86_REG8_AH:
snprintf(result, 5, "%%ah");
break;
case X86_REG8_CH:
snprintf(result, 5, "%%ch");
break;
case X86_REG8_DH:
snprintf(result, 5, "%%dh");
break;
case X86_REG8_BH:
snprintf(result, 5, "%%bh");
break;
case X86_REG8_NONE:
/* Ne devrait jamais arriver */
break;
}
break;
case AOS_16_BITS:
switch (reg->reg.reg16)
{
case X86_REG16_AX:
snprintf(result, 5, "%%ax");
break;
case X86_REG16_CX:
snprintf(result, 5, "%%cx");
break;
case X86_REG16_DX:
snprintf(result, 5, "%%dx");
break;
case X86_REG16_BX:
snprintf(result, 5, "%%bx");
break;
case X86_REG16_SP:
snprintf(result, 5, "%%sp");
break;
case X86_REG16_BP:
snprintf(result, 5, "%%bp");
break;
case X86_REG16_SI:
snprintf(result, 5, "%%si");
break;
case X86_REG16_DI:
snprintf(result, 5, "%%di");
break;
case X86_REG16_NONE:
/* Ne devrait jamais arriver */
break;
}
break;
case AOS_32_BITS:
switch (reg->reg.reg32)
{
case X86_REG32_EAX:
snprintf(result, 5, "%%eax");
break;
case X86_REG32_ECX:
snprintf(result, 5, "%%ecx");
break;
case X86_REG32_EDX:
snprintf(result, 5, "%%edx");
break;
case X86_REG32_EBX:
snprintf(result, 5, "%%ebx");
break;
case X86_REG32_ESP:
snprintf(result, 5, "%%esp");
break;
case X86_REG32_EBP:
snprintf(result, 5, "%%ebp");
break;
case X86_REG32_ESI:
snprintf(result, 5, "%%esi");
break;
case X86_REG32_EDI:
snprintf(result, 5, "%%edi");
break;
case X86_REG32_NONE:
/* Ne devrait jamais arriver */
break;
}
break;
default:
break;
}
break;
default:
break;
}
return result;
}