diff options
author | Cyrille Bagard <nocbos@gmail.com> | 2018-05-28 17:37:46 (GMT) |
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committer | Cyrille Bagard <nocbos@gmail.com> | 2018-05-28 17:37:46 (GMT) |
commit | 9f5ed46de568d3db882c939c8ca9d0117bff3369 (patch) | |
tree | 9d2090cd640e54379dc1b982e03dc284b2d23ae7 /plugins/arm/v7/registers/simd.c | |
parent | 2fd186a84cba4f39f6f1bb8bd34d52b4e1d4f814 (diff) |
Relied on register objects as often as possible.
Diffstat (limited to 'plugins/arm/v7/registers/simd.c')
-rw-r--r-- | plugins/arm/v7/registers/simd.c | 534 |
1 files changed, 534 insertions, 0 deletions
diff --git a/plugins/arm/v7/registers/simd.c b/plugins/arm/v7/registers/simd.c new file mode 100644 index 0000000..1a71fc7 --- /dev/null +++ b/plugins/arm/v7/registers/simd.c @@ -0,0 +1,534 @@ + +/* Chrysalide - Outil d'analyse de fichiers binaires + * simd.c - aides auxiliaires relatives aux registres SIMD 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 "simd.h" + + +#include <assert.h> +#include <stdio.h> + + +#include "../register-int.h" + + + +/* ------------------------- GESTION UNITAIRE DES REGISTRES ------------------------- */ + + +/* Représentation d'un registre ARMv7 (instance) */ +struct _GArmV7SIMDRegister +{ + GArmV7Register parent; /* Instance parente */ + + SIMDRegisterMapping mapping; /* Type de registre */ + +}; + +/* Représentation d'un registre ARMv7 (classe) */ +struct _GArmV7SIMDRegisterClass +{ + GArmV7RegisterClass parent; /* Classe parente */ + +}; + + +#define MAX_REGNAME_LEN 4 + + +/* Initialise la classe des registres SIMD ARMv7. */ +static void g_armv7_simd_register_class_init(GArmV7SIMDRegisterClass *); + +/* Initialise une instance de registre SIMD ARMv7. */ +static void g_armv7_simd_register_init(GArmV7SIMDRegister *); + +/* Supprime toutes les références externes. */ +static void g_armv7_simd_register_dispose(GArmV7SIMDRegister *); + +/* Procède à la libération totale de la mémoire. */ +static void g_armv7_simd_register_finalize(GArmV7SIMDRegister *); + +/* Traduit un registre en version humainement lisible. */ +static void g_armv7_simd_register_print(const GArmV7SIMDRegister *, GBufferLine *, AsmSyntax); + +/* Crée une réprésentation de registre SIMD ARMv7. */ +static GArchRegister *_g_armv7_simd_register_new(SIMDRegisterMapping, uint8_t); + + + +/* --------------------- TRANSPOSITIONS VIA CACHE DES REGISTRES --------------------- */ + + +/* Charge un registre depuis une mémoire tampon. */ +static GArchRegister *g_armv7_simd_register_unserialize(GArmV7SIMDRegister *, GAsmStorage *, packed_buffer *); + +/* Sauvegarde un registre dans une mémoire tampon. */ +static bool g_armv7_simd_register_serialize(const GArmV7SIMDRegister *, GAsmStorage *, packed_buffer *); + + + +/* ------------------------ GESTION SOUS FORME DE SINGLETONS ------------------------ */ + + +/* Conservation des registres utilisés */ +static GArchRegister **_armv7_simd_registers[SRM_COUNT] = { NULL, NULL, NULL }; +static size_t _av7_simd_reg_count[SRM_COUNT] = { 0, 0, 0 }; +G_LOCK_DEFINE_STATIC(_av7_simd_reg_mutex); + + +/* Fournit le singleton associé à un registre SIMD ARMv7. */ +static GArchRegister *get_armv7_simd_register(SIMDRegisterMapping, uint8_t); + + + +/* ---------------------------------------------------------------------------------- */ +/* GESTION UNITAIRE DES REGISTRES */ +/* ---------------------------------------------------------------------------------- */ + + +/* Indique le type défini pour une représentation d'un registre SIMD ARMv7. */ +G_DEFINE_TYPE(GArmV7SIMDRegister, g_armv7_simd_register, G_TYPE_ARMV7_REGISTER); + + +/****************************************************************************** +* * +* Paramètres : klass = classe à initialiser. * +* * +* Description : Initialise la classe des registres SIMD ARMv7. * +* * +* Retour : - * +* * +* Remarques : - * +* * +******************************************************************************/ + +static void g_armv7_simd_register_class_init(GArmV7SIMDRegisterClass *klass) +{ + GObjectClass *object_class; /* Autre version de la classe */ + GArchRegisterClass *reg_class; /* Classe de haut niveau */ + + object_class = G_OBJECT_CLASS(klass); + + object_class->dispose = (GObjectFinalizeFunc/* ! */)g_armv7_simd_register_dispose; + object_class->finalize = (GObjectFinalizeFunc)g_armv7_simd_register_finalize; + + reg_class = G_ARCH_REGISTER_CLASS(klass); + + reg_class->print = (reg_print_fc)g_armv7_simd_register_print; + reg_class->unserialize = (reg_unserialize_fc)g_armv7_simd_register_unserialize; + reg_class->serialize = (reg_serialize_fc)g_armv7_simd_register_serialize; + + +} + + +/****************************************************************************** +* * +* Paramètres : reg = instance à initialiser. * +* * +* Description : Initialise une instance de registre SIMD ARMv7. * +* * +* Retour : - * +* * +* Remarques : - * +* * +******************************************************************************/ + +static void g_armv7_simd_register_init(GArmV7SIMDRegister *reg) +{ + +} + + +/****************************************************************************** +* * +* Paramètres : reg = instance d'objet GLib à traiter. * +* * +* Description : Supprime toutes les références externes. * +* * +* Retour : - * +* * +* Remarques : - * +* * +******************************************************************************/ + +static void g_armv7_simd_register_dispose(GArmV7SIMDRegister *reg) +{ + G_OBJECT_CLASS(g_armv7_simd_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_simd_register_finalize(GArmV7SIMDRegister *reg) +{ + G_OBJECT_CLASS(g_armv7_simd_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_simd_register_print(const GArmV7SIMDRegister *reg, GBufferLine *line, AsmSyntax syntax) +{ + char key[MAX_REGNAME_LEN]; /* Mot clef principal */ + size_t klen; /* Taille de ce mot clef */ + + switch (reg->mapping) + { + case SRM_SINGLE_WORD: + klen = snprintf(key, MAX_REGNAME_LEN, "s%hhu", G_ARM_REGISTER(reg)->index); + break; + + case SRM_DOUBLE_WORD: + klen = snprintf(key, MAX_REGNAME_LEN, "d%hhu", G_ARM_REGISTER(reg)->index); + break; + + case SRM_QUAD_WORD: + klen = snprintf(key, MAX_REGNAME_LEN, "q%hhu", G_ARM_REGISTER(reg)->index); + break; + + default: + assert(false); + klen = snprintf(key, MAX_REGNAME_LEN, "x??"); + break; + + } + + g_buffer_line_append_text(line, BLC_ASSEMBLY, key, klen, RTT_REGISTER, NULL); + +} + + +/****************************************************************************** +* * +* Paramètres : mapping = type de registre demandé. * +* index = indice du registre correspondant. * +* * +* Description : Crée une réprésentation de registre SIMD ARMv7. * +* * +* Retour : Adresse de la structure mise en place. * +* * +* Remarques : - * +* * +******************************************************************************/ + +static GArchRegister *_g_armv7_simd_register_new(SIMDRegisterMapping mapping, uint8_t index) +{ + GArmV7SIMDRegister *result; /* Structure à retourner */ + uint8_t max; /* Borne supérieure de limite */ + + switch (mapping) + { + case SRM_SINGLE_WORD: + max = 31; + break; + + case SRM_DOUBLE_WORD: + max = 31; + break; + + case SRM_QUAD_WORD: + max = 15; + break; + + default: + assert(false); + goto bad_mapping; + break; + + } + + if (index > max) + goto bad_index; + + result = g_object_new(G_TYPE_ARMV7_SIMD_REGISTER, NULL); + + G_ARM_REGISTER(result)->index = index; + + result->mapping = mapping; + + return G_ARCH_REGISTER(result); + + bad_mapping: + bad_index: + + return NULL; + +} + + +/****************************************************************************** +* * +* Paramètres : mapping = type de registre demandé. * +* index = indice du registre correspondant. * +* * +* Description : Crée une réprésentation de registre SIMD ARMv7. * +* * +* Retour : Adresse de la structure mise en place. * +* * +* Remarques : - * +* * +******************************************************************************/ + +GArchRegister *g_armv7_simd_register_new(SIMDRegisterMapping mapping, uint8_t index) +{ + GArchRegister *result; /* Structure à retourner */ + + result = get_armv7_simd_register(mapping, 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_simd_register_unserialize(GArmV7SIMDRegister *reg, GAsmStorage *storage, packed_buffer *pbuf) +{ + GArchRegister *result; /* Instance à retourner */ + SIMDRegisterMapping mapping; /* Type de registre */ + bool status; /* Bilan d'une extraction */ + uint8_t index; /* Indice du registre */ + GArchRegisterClass *parent; /* Classe parente à consulter */ + + status = extract_packed_buffer(pbuf, &mapping, sizeof(SIMDRegisterMapping), true); + + if (status) + status = extract_packed_buffer(pbuf, &index, sizeof(uint8_t), false); + + if (status) + { + result = get_armv7_simd_register(mapping, 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_simd_register_parent_class); + + result = parent->unserialize(G_ARCH_REGISTER(reg), storage, pbuf); + + } + + return result; + +} + + +/****************************************************************************** +* * +* Paramètres : reg = registre d'architecture à consulter. * +* storage = mécanisme de sauvegarde à manipuler. * +* pbuf = zone tampon à remplir. * +* * +* Description : Sauvegarde un registre dans une mémoire tampon. * +* * +* Retour : Bilan de l'opération. * +* * +* Remarques : - * +* * +******************************************************************************/ + +static bool g_armv7_simd_register_serialize(const GArmV7SIMDRegister *reg, GAsmStorage *storage, packed_buffer *pbuf) +{ + bool result; /* Bilan à retourner */ + GArchRegisterClass *parent; /* Classe parente à consulter */ + + result = extend_packed_buffer(pbuf, ®->mapping, sizeof(SIMDRegisterMapping), true); + + if (result) + { + parent = G_ARCH_REGISTER_CLASS(g_armv7_simd_register_parent_class); + + result = parent->serialize(G_ARCH_REGISTER(reg), storage, pbuf); + + } + + return result; + +} + + + +/* ---------------------------------------------------------------------------------- */ +/* GESTION SOUS FORME DE SINGLETONS */ +/* ---------------------------------------------------------------------------------- */ + + +/****************************************************************************** +* * +* Paramètres : mapping = type de registre demandé. * +* index = indice du registre correspondant. * +* * +* Description : Fournit le singleton associé à un registre SIMD ARMv7. * +* * +* Retour : Adresse de la structure mise en place. * +* * +* Remarques : - * +* * +******************************************************************************/ + +static GArchRegister *get_armv7_simd_register(SIMDRegisterMapping mapping, uint8_t index) +{ + GArchRegister *result; /* Structure à retourner */ + size_t new_count; /* Nouvelle taille à considérer*/ + size_t i; /* Boucle de parcours */ + + assert(mapping < SRM_COUNT); + + G_LOCK(_av7_simd_reg_mutex); + + if (index >= _av7_simd_reg_count[mapping]) + { + /** + * 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_simd_register_new(mapping, index); + + if (result == NULL) + goto bad_index; + + new_count = index + 1; + + _armv7_simd_registers[mapping] = realloc(_armv7_simd_registers[mapping], + new_count * sizeof(GArchRegister *)); + + for (i = _av7_simd_reg_count[mapping]; i < new_count; i++) + _armv7_simd_registers[mapping][i] = NULL; + + _av7_simd_reg_count[mapping] = new_count; + + } + + else + result = NULL; + + if (_armv7_simd_registers[mapping][index] == NULL) + { + if (result != NULL) + _armv7_simd_registers[mapping][index] = result; + else + _armv7_simd_registers[mapping][index] = _g_armv7_simd_register_new(mapping, index); + } + + result = _armv7_simd_registers[mapping][index]; + + G_UNLOCK(_av7_simd_reg_mutex); + + g_object_ref(G_OBJECT(result)); + + bad_index: + + return result; + +} + + +/****************************************************************************** +* * +* Paramètres : - * +* * +* Description : Vide totalement le cache des registres SIMD ARMv7. * +* * +* Retour : - * +* * +* Remarques : - * +* * +******************************************************************************/ + +void clean_armv7_simd_register_cache(void) +{ + SIMDRegisterMapping i; /* Boucle de parcours #1 */ + size_t k; /* Boucle de parcours #2 */ + + G_LOCK(_av7_simd_reg_mutex); + + for (i = 0; i < SRM_COUNT; i++) + { + for (k = 0; k < _av7_simd_reg_count[i]; k++) + g_object_unref(G_OBJECT(_armv7_simd_registers[i][k])); + + if (_armv7_simd_registers[i] != NULL) + free(_armv7_simd_registers[i]); + + _armv7_simd_registers[i] = NULL; + _av7_simd_reg_count[i] = 0; + + } + + G_UNLOCK(_av7_simd_reg_mutex); + +} |