diff options
Diffstat (limited to 'plugins/arm/v7/registers/banked.c')
| -rw-r--r-- | plugins/arm/v7/registers/banked.c | 726 |
1 files changed, 726 insertions, 0 deletions
diff --git a/plugins/arm/v7/registers/banked.c b/plugins/arm/v7/registers/banked.c new file mode 100644 index 0000000..bce48dd --- /dev/null +++ b/plugins/arm/v7/registers/banked.c @@ -0,0 +1,726 @@ + +/* Chrysalide - Outil d'analyse de fichiers binaires + * banked.c - aides auxiliaires relatives aux registres de banque ARMv7 + * + * Copyright (C) 2018 Cyrille Bagard + * + * This file is part of Chrysalide. + * + * Chrysalide 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. + * + * Chrysalide 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 Chrysalide. If not, see <http://www.gnu.org/licenses/>. + */ + + +#include "banked.h" + + +#include <stdio.h> + + +#include "../register-int.h" + + + +/* ------------------------- GESTION UNITAIRE DES REGISTRES ------------------------- */ + + +/* Représentation d'un registre de banque ARMv7 (instance) */ +struct _GArmV7BankedRegister +{ + GArmV7Register parent; /* Instance parente */ + +}; + +/* Représentation d'un registre de banque ARMv7 (classe) */ +struct _GArmV7BankedRegisterClass +{ + GArmV7RegisterClass parent; /* Classe parente */ + +}; + + +#define MAX_REGNAME_LEN 9 + + +/* Initialise la classe des registres de banque ARMv7. */ +static void g_armv7_banked_register_class_init(GArmV7BankedRegisterClass *); + +/* Initialise une instance de registre de banque ARMv7. */ +static void g_armv7_banked_register_init(GArmV7BankedRegister *); + +/* Supprime toutes les références externes. */ +static void g_armv7_banked_register_dispose(GArmV7BankedRegister *); + +/* Procède à la libération totale de la mémoire. */ +static void g_armv7_banked_register_finalize(GArmV7BankedRegister *); + +/* Traduit un registre en version humainement lisible. */ +static void g_armv7_banked_register_print(const GArmV7BankedRegister *, GBufferLine *, AsmSyntax); + +/* Convertit en indice des paramètres d'encodage. */ +static BankedRegisterTarget convert_r_sysm_to_target(uint8_t, uint8_t); + +/* Crée une réprésentation de registre de banque ARMv7. */ +static GArchRegister *_g_armv7_banked_register_new(BankedRegisterTarget); + + + +/* --------------------- TRANSPOSITIONS VIA CACHE DES REGISTRES --------------------- */ + + +/* Charge un registre depuis une mémoire tampon. */ +static GArchRegister *g_armv7_banked_register_unserialize(GArmV7BankedRegister *, GAsmStorage *, packed_buffer *); + + + +/* ------------------------ GESTION SOUS FORME DE SINGLETONS ------------------------ */ + + +/* Conservation des registres utilisés */ +static GArchRegister **_armv7_banked_registers = NULL; +static size_t _av7_banked_reg_count = 0; +G_LOCK_DEFINE_STATIC(_av7_banked_reg_mutex); + + +/* Fournit le singleton associé à un registre de banque ARMv7. */ +static GArchRegister *get_armv7_banked_register(BankedRegisterTarget); + + + +/* ---------------------------------------------------------------------------------- */ +/* GESTION UNITAIRE DES REGISTRES */ +/* ---------------------------------------------------------------------------------- */ + + +/* Indique le type défini pour une représentation d'un registre de banque ARMv7. */ +G_DEFINE_TYPE(GArmV7BankedRegister, g_armv7_banked_register, G_TYPE_ARMV7_REGISTER); + + +/****************************************************************************** +* * +* Paramètres : klass = classe à initialiser. * +* * +* Description : Initialise la classe des registres de banque ARMv7. * +* * +* Retour : - * +* * +* Remarques : - * +* * +******************************************************************************/ + +static void g_armv7_banked_register_class_init(GArmV7BankedRegisterClass *klass) +{ + GObjectClass *object_class; /* Autre version de la classe */ + GArchRegisterClass *reg_class; /* Classe de haut niveau */ + + object_class = G_OBJECT_CLASS(klass); + reg_class = G_ARCH_REGISTER_CLASS(klass); + + object_class->dispose = (GObjectFinalizeFunc/* ! */)g_armv7_banked_register_dispose; + object_class->finalize = (GObjectFinalizeFunc)g_armv7_banked_register_finalize; + + reg_class->print = (reg_print_fc)g_armv7_banked_register_print; + reg_class->unserialize = (reg_unserialize_fc)g_armv7_banked_register_unserialize; + +} + + +/****************************************************************************** +* * +* Paramètres : reg = instance à initialiser. * +* * +* Description : Initialise une instance de registre de banque ARMv7. * +* * +* Retour : - * +* * +* Remarques : - * +* * +******************************************************************************/ + +static void g_armv7_banked_register_init(GArmV7BankedRegister *reg) +{ + +} + + +/****************************************************************************** +* * +* Paramètres : reg = instance d'objet GLib à traiter. * +* * +* Description : Supprime toutes les références externes. * +* * +* Retour : - * +* * +* Remarques : - * +* * +******************************************************************************/ + +static void g_armv7_banked_register_dispose(GArmV7BankedRegister *reg) +{ + G_OBJECT_CLASS(g_armv7_banked_register_parent_class)->dispose(G_OBJECT(reg)); + +} + + +/****************************************************************************** +* * +* Paramètres : reg = instance d'objet GLib à traiter. * +* * +* Description : Procède à la libération totale de la mémoire. * +* * +* Retour : - * +* * +* Remarques : - * +* * +******************************************************************************/ + +static void g_armv7_banked_register_finalize(GArmV7BankedRegister *reg) +{ + G_OBJECT_CLASS(g_armv7_banked_register_parent_class)->finalize(G_OBJECT(reg)); + +} + + +/****************************************************************************** +* * +* Paramètres : reg = registre à transcrire. * +* line = ligne tampon où imprimer l'opérande donné. * +* syntax = type de représentation demandée. * +* * +* Description : Traduit un registre en version humainement lisible. * +* * +* Retour : - * +* * +* Remarques : - * +* * +******************************************************************************/ + +static void g_armv7_banked_register_print(const GArmV7BankedRegister *reg, GBufferLine *line, AsmSyntax syntax) +{ + BankedRegisterTarget target; /* Registre ciblé */ + char key[MAX_REGNAME_LEN]; /* Mot clef principal */ + size_t klen; /* Taille de ce mot clef */ + + target = G_ARM_REGISTER(reg)->index; + + switch (target) + { + case BRT_R8_USR: + klen = snprintf(key, MAX_REGNAME_LEN, "R8_usr"); + break; + case BRT_R9_USR: + klen = snprintf(key, MAX_REGNAME_LEN, "R9_usr"); + break; + case BRT_R10_USR: + klen = snprintf(key, MAX_REGNAME_LEN, "R10_usr"); + break; + case BRT_R11_USR: + klen = snprintf(key, MAX_REGNAME_LEN, "R11_usr"); + break; + case BRT_R12_USR: + klen = snprintf(key, MAX_REGNAME_LEN, "R12_usr"); + break; + case BRT_SP_USR: + klen = snprintf(key, MAX_REGNAME_LEN, "SP_usr"); + break; + case BRT_LR_USR: + klen = snprintf(key, MAX_REGNAME_LEN, "LR_usr"); + break; + + case BRT_R8_FIQ: + klen = snprintf(key, MAX_REGNAME_LEN, "R8_fiq"); + break; + case BRT_R9_FIQ: + klen = snprintf(key, MAX_REGNAME_LEN, "R9_fiq"); + break; + case BRT_R10_FIQ: + klen = snprintf(key, MAX_REGNAME_LEN, "R10_fiq"); + break; + case BRT_R11_FIQ: + klen = snprintf(key, MAX_REGNAME_LEN, "R11_fiq"); + break; + case BRT_R12_FIQ: + klen = snprintf(key, MAX_REGNAME_LEN, "R12_fiq"); + break; + case BRT_SP_FIQ: + klen = snprintf(key, MAX_REGNAME_LEN, "SP_fiq"); + break; + case BRT_LR_FIQ: + klen = snprintf(key, MAX_REGNAME_LEN, "LR_fiq"); + break; + + case BRT_LR_IRQ: + klen = snprintf(key, MAX_REGNAME_LEN, "LR_irq"); + break; + case BRT_SP_IRQ: + klen = snprintf(key, MAX_REGNAME_LEN, "SP_irq"); + break; + case BRT_LR_SVC: + klen = snprintf(key, MAX_REGNAME_LEN, "LR_svc"); + break; + case BRT_SP_SVC: + klen = snprintf(key, MAX_REGNAME_LEN, "SP_svc"); + break; + case BRT_LR_ABT: + klen = snprintf(key, MAX_REGNAME_LEN, "LR_abt"); + break; + case BRT_SP_ABT: + klen = snprintf(key, MAX_REGNAME_LEN, "SP_abt"); + break; + case BRT_LR_UND: + klen = snprintf(key, MAX_REGNAME_LEN, "LR_und"); + break; + case BRT_SP_UND: + klen = snprintf(key, MAX_REGNAME_LEN, "SP_und"); + break; + + case BRT_LR_MON: + klen = snprintf(key, MAX_REGNAME_LEN, "LR_mon"); + break; + case BRT_SP_MON: + klen = snprintf(key, MAX_REGNAME_LEN, "SP_mon"); + break; + case BRT_ELR_HYP: + klen = snprintf(key, MAX_REGNAME_LEN, "ELR_hyp"); + break; + case BRT_SP_HYP: + klen = snprintf(key, MAX_REGNAME_LEN, "SP_hyp"); + break; + + case BRT_SPSR_IRQ: + klen = snprintf(key, MAX_REGNAME_LEN, "SPSR_irq"); + break; + case BRT_SPSR_SVC: + klen = snprintf(key, MAX_REGNAME_LEN, "SPSR_svc"); + break; + + default: + klen = snprintf(key, MAX_REGNAME_LEN, "???"); + break; + + } + + g_buffer_line_append_text(line, BLC_ASSEMBLY, key, klen, RTT_REGISTER, NULL); + +} + + +/****************************************************************************** +* * +* Paramètres : r = premier champ à interpréter. * +* sysm = second champ à interpréter. * +* * +* Description : Convertit en indice des paramètres d'encodage. * +* * +* Retour : Registre ciblé ou BRT_COUNT en cas d'invalidité. * +* * +* Remarques : - * +* * +******************************************************************************/ + +static BankedRegisterTarget convert_r_sysm_to_target(uint8_t r, uint8_t sysm) +{ + BankedRegisterTarget result; /* Cible effective à retourner */ + uint8_t sysm_20; /* Décomposition en bits #1 */ + uint8_t sysm_43; /* Décomposition en bits #2 */ + + result = BRT_COUNT; + + sysm_20 = (sysm & 0x3); + sysm_43 = (sysm & 0x18) >> 3; + + if (r == 0) + { + switch (sysm_43) + { + case 0b00: + switch (sysm_20) + { + case 0b000: + result = BRT_R8_USR; + break; + case 0b001: + result = BRT_R9_USR; + break; + case 0b010: + result = BRT_R10_USR; + break; + case 0b011: + result = BRT_R11_USR; + break; + case 0b100: + result = BRT_R12_USR; + break; + case 0b101: + result = BRT_SP_USR; + break; + case 0b110: + result = BRT_LR_USR; + break; + } + break; + + case 0b01: + switch (sysm_20) + { + case 0b000: + result = BRT_R8_FIQ; + break; + case 0b001: + result = BRT_R9_FIQ; + break; + case 0b010: + result = BRT_R10_FIQ; + break; + case 0b011: + result = BRT_R11_FIQ; + break; + case 0b100: + result = BRT_R12_FIQ; + break; + case 0b101: + result = BRT_SP_FIQ; + break; + case 0b110: + result = BRT_LR_FIQ; + break; + } + break; + + case 0b10: + switch (sysm_20) + { + case 0b000: + result = BRT_LR_IRQ; + break; + case 0b001: + result = BRT_SP_IRQ; + break; + case 0b010: + result = BRT_LR_SVC; + break; + case 0b011: + result = BRT_SP_SVC; + break; + case 0b100: + result = BRT_LR_ABT; + break; + case 0b101: + result = BRT_SP_ABT; + break; + case 0b110: + result = BRT_LR_UND; + break; + case 0b111: + result = BRT_SP_UND; + break; + } + break; + + case 0b11: + switch (sysm_20) + { + case 0b100: + result = BRT_LR_MON; + break; + case 0b101: + result = BRT_SP_MON; + break; + case 0b110: + result = BRT_ELR_HYP; + break; + case 0b111: + result = BRT_SP_HYP; + break; + } + break; + + } + + } + + else if (r == 1) + { + switch (sysm_43) + { + case 0b10: + switch (sysm_20) + { + case 0b000: + result = BRT_SPSR_IRQ; + break; + case 0b010: + result = BRT_SPSR_SVC; + break; + } + break; + + } + + } + + return result; + +} + + +/****************************************************************************** +* * +* Paramètres : target = registre effectivement ciblé. * +* * +* Description : Crée une réprésentation de registre de banque ARMv7. * +* * +* Retour : Adresse de la structure mise en place. * +* * +* Remarques : - * +* * +******************************************************************************/ + +static GArchRegister *_g_armv7_banked_register_new(BankedRegisterTarget target) +{ + GArmV7BankedRegister *result; /* Structure à retourner */ + + if (target >= BRT_COUNT) + goto bad_values; + + result = g_object_new(G_TYPE_ARMV7_BANKED_REGISTER, NULL); + + G_ARM_REGISTER(result)->index = target; + + return G_ARCH_REGISTER(result); + + bad_values: + + return NULL; + +} + + +/****************************************************************************** +* * +* Paramètres : r = premier champ à interpréter. * +* sysm = second champ à interpréter. * +* * +* Description : Crée une réprésentation de registre de banque ARMv7. * +* * +* Retour : Adresse de la structure mise en place. * +* * +* Remarques : - * +* * +******************************************************************************/ + +GArchRegister *g_armv7_banked_register_new(uint8_t r, uint8_t sysm) +{ + GArchRegister *result; /* Structure à retourner */ + BankedRegisterTarget target; /* Registre effectivement ciblé*/ + + target = convert_r_sysm_to_target(r, sysm); + + if (target >= BRT_COUNT) + goto bad_values; + + result = get_armv7_banked_register(target); + + return result; + + bad_values: + + return NULL; + +} + + +/****************************************************************************** +* * +* Paramètres : reg = registre à consulter. * +* * +* Description : Fournit le registre de banque ciblé. * +* * +* Retour : - * +* * +* Remarques : - * +* * +******************************************************************************/ + +BankedRegisterTarget g_armv7_banked_register_get_target(const GArmV7BankedRegister *reg) +{ + BankedRegisterTarget result; /* Cible à retourner */ + + result = G_ARM_REGISTER(reg)->index; + + return result; + +} + + + +/* ---------------------------------------------------------------------------------- */ +/* TRANSPOSITIONS VIA CACHE DES OPERANDES */ +/* ---------------------------------------------------------------------------------- */ + + +/****************************************************************************** +* * +* Paramètres : reg = registre d'architecture à constituer. * +* storage = mécanisme de sauvegarde à manipuler. * +* pbuf = zone tampon à remplir. * +* * +* Description : Charge un registre depuis une mémoire tampon. * +* * +* Retour : Bilan de l'opération. * +* * +* Remarques : - * +* * +******************************************************************************/ + +static GArchRegister *g_armv7_banked_register_unserialize(GArmV7BankedRegister *reg, GAsmStorage *storage, packed_buffer *pbuf) +{ + GArchRegister *result; /* Instance à retourner */ + uint8_t index; /* Indice du registre */ + bool status; /* Bilan d'une extraction */ + GArchRegisterClass *parent; /* Classe parente à consulter */ + + status = extract_packed_buffer(pbuf, &index, sizeof(uint8_t), false); + + if (status) + { + result = get_armv7_banked_register(index); + + if (result == NULL) + g_object_unref(G_OBJECT(reg)); + + } + + else + { + g_object_unref(G_OBJECT(reg)); + result = NULL; + } + + if (result != NULL) + { + parent = G_ARCH_REGISTER_CLASS(g_armv7_banked_register_parent_class); + + result = parent->unserialize(result, storage, pbuf); + + } + + return result; + +} + + + +/* ---------------------------------------------------------------------------------- */ +/* GESTION SOUS FORME DE SINGLETONS */ +/* ---------------------------------------------------------------------------------- */ + + +/****************************************************************************** +* * +* Paramètres : target = registre effectivement ciblé. * +* * +* Description : Fournit le singleton associé à un registre de banque ARMv7. * +* * +* Retour : Adresse de la structure mise en place. * +* * +* Remarques : - * +* * +******************************************************************************/ + +static GArchRegister *get_armv7_banked_register(BankedRegisterTarget target) +{ + GArchRegister *result; /* Structure à retourner */ + size_t new_count; /* Nouvelle taille à considérer*/ + size_t i; /* Boucle de parcours */ + + G_LOCK(_av7_banked_reg_mutex); + + if (target >= _av7_banked_reg_count) + { + /** + * On valide déjà le fait que le registre puisse être créé + * avant de réaliser une allocation potentiellement énorme + * avec un indice démesuré. + */ + + result = _g_armv7_banked_register_new(target); + + if (result == NULL) + goto bad_values; + + new_count = target + 1; + + _armv7_banked_registers = realloc(_armv7_banked_registers, new_count * sizeof(GArchRegister *)); + + for (i = _av7_banked_reg_count; i < new_count; i++) + _armv7_banked_registers[i] = NULL; + + _av7_banked_reg_count = new_count; + + } + + else + result = NULL; + + if (_armv7_banked_registers[target] == NULL) + { + if (result != NULL) + _armv7_banked_registers[target] = result; + else + _armv7_banked_registers[target] = _g_armv7_banked_register_new(target); + } + + result = _armv7_banked_registers[target]; + + G_UNLOCK(_av7_banked_reg_mutex); + + g_object_ref(G_OBJECT(result)); + + bad_values: + + return result; + +} + + +/****************************************************************************** +* * +* Paramètres : - * +* * +* Description : Vide totalement le cache des registres de banque ARMv7. * +* * +* Retour : - * +* * +* Remarques : - * +* * +******************************************************************************/ + +void clean_armv7_banked_register_cache(void) +{ + size_t i; /* Boucle de parcours */ + + G_LOCK(_av7_banked_reg_mutex); + + for (i = 0; i < _av7_banked_reg_count; i++) + g_object_unref(G_OBJECT(_armv7_banked_registers[i])); + + if (_armv7_banked_registers != NULL) + free(_armv7_banked_registers); + + _armv7_banked_registers = NULL; + _av7_banked_reg_count = 0; + + G_UNLOCK(_av7_banked_reg_mutex); + +} |