diff options
Diffstat (limited to 'src/arch/x86/registers.c')
-rw-r--r-- | src/arch/x86/registers.c | 530 |
1 files changed, 530 insertions, 0 deletions
diff --git a/src/arch/x86/registers.c b/src/arch/x86/registers.c new file mode 100644 index 0000000..802e2f6 --- /dev/null +++ b/src/arch/x86/registers.c @@ -0,0 +1,530 @@ + +/* 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 <http://www.gnu.org/licenses/>. + */ + + +#include "registers.h" + + +#include <malloc.h> +#include <stdio.h> + + + +/* 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; + +} |