/* Chrysalide - Outil d'analyse de fichiers binaires
* special.c - aides auxiliaires relatives aux registres spéciaux 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 .
*/
#include "special.h"
#include
#include
#include "../register-int.h"
/* ------------------------- GESTION UNITAIRE DES REGISTRES ------------------------- */
/* Représentation d'un registre spécial ARMv7 (instance) */
struct _GArmV7SpecialRegister
{
GArmV7Register parent; /* Instance parente */
};
/* Représentation d'un registre spécial ARMv7 (classe) */
struct _GArmV7SpecialRegisterClass
{
GArmV7RegisterClass parent; /* Classe parente - */
};
#define MAX_REGNAME_LEN 12
/* Initialise la classe des registres spéciaux ARMv7. */
static void g_armv7_special_register_class_init(GArmV7SpecialRegisterClass *);
/* Initialise une instance de registre spécial ARMv7. */
static void g_armv7_special_register_init(GArmV7SpecialRegister *);
/* Supprime toutes les références externes. */
static void g_armv7_special_register_dispose(GArmV7SpecialRegister *);
/* Procède à la libération totale de la mémoire. */
static void g_armv7_special_register_finalize(GArmV7SpecialRegister *);
/* Traduit un registre en version humainement lisible. */
static void g_armv7_special_register_print(const GArmV7SpecialRegister *, GBufferLine *);
/* Crée une réprésentation de registre spécial ARMv7. */
static GArchRegister *_g_armv7_special_register_new(SpecRegTarget);
/* ------------------------ GESTION SOUS FORME DE SINGLETONS ------------------------ */
/* Conservation des registres utilisés */
static GArchRegister **_armv7_special_registers = NULL;
static size_t _av7_special_reg_count = 0;
G_LOCK_DEFINE_STATIC(_av7_special_reg_mutex);
/* Fournit le singleton associé à un registre spécial ARMv7. */
static GArchRegister *get_armv7_special_register(SpecRegTarget);
/* ---------------------------------------------------------------------------------- */
/* GESTION UNITAIRE DES REGISTRES */
/* ---------------------------------------------------------------------------------- */
/* Indique le type défini pour une représentation d'un registre spécial ARMv7. */
G_DEFINE_TYPE(GArmV7SpecialRegister, g_armv7_special_register, G_TYPE_ARMV7_REGISTER);
/******************************************************************************
* *
* Paramètres : klass = classe à initialiser. *
* *
* Description : Initialise la classe des registres spéciaux ARMv7. *
* *
* Retour : - *
* *
* Remarques : - *
* *
******************************************************************************/
static void g_armv7_special_register_class_init(GArmV7SpecialRegisterClass *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_special_register_dispose;
object_class->finalize = (GObjectFinalizeFunc)g_armv7_special_register_finalize;
reg_class->print = (reg_print_fc)g_armv7_special_register_print;
}
/******************************************************************************
* *
* Paramètres : reg = instance à initialiser. *
* *
* Description : Initialise une instance de registre spécial ARMv7. *
* *
* Retour : - *
* *
* Remarques : - *
* *
******************************************************************************/
static void g_armv7_special_register_init(GArmV7SpecialRegister *reg)
{
}
/******************************************************************************
* *
* Paramètres : reg = instance d'objet GLib à traiter. *
* *
* Description : Supprime toutes les références externes. *
* *
* Retour : - *
* *
* Remarques : - *
* *
******************************************************************************/
static void g_armv7_special_register_dispose(GArmV7SpecialRegister *reg)
{
G_OBJECT_CLASS(g_armv7_special_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_special_register_finalize(GArmV7SpecialRegister *reg)
{
G_OBJECT_CLASS(g_armv7_special_register_parent_class)->finalize(G_OBJECT(reg));
}
/******************************************************************************
* *
* Paramètres : reg = registre à transcrire. *
* line = ligne tampon où imprimer l'opérande donné. *
* *
* Description : Traduit un registre en version humainement lisible. *
* *
* Retour : - *
* *
* Remarques : - *
* *
******************************************************************************/
static void g_armv7_special_register_print(const GArmV7SpecialRegister *reg, GBufferLine *line)
{
SpecRegTarget 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 SRT_APSR:
klen = snprintf(key, MAX_REGNAME_LEN, "APSR");
break;
case SRT_CPSR:
klen = snprintf(key, MAX_REGNAME_LEN, "CPSR");
break;
case SRT_SPSR:
klen = snprintf(key, MAX_REGNAME_LEN, "SPSR");
break;
case SRT_APSR_NZCVQ:
klen = snprintf(key, MAX_REGNAME_LEN, "APSR_nzcvq");
break;
case SRT_APSR_G:
klen = snprintf(key, MAX_REGNAME_LEN, "APSR_g");
break;
case SRT_APSR_NZCVQG:
klen = snprintf(key, MAX_REGNAME_LEN, "APSR_nzcvqg");
break;
case SRT_FPSID:
klen = snprintf(key, MAX_REGNAME_LEN, "FPSID");
break;
case SRT_FPSCR:
klen = snprintf(key, MAX_REGNAME_LEN, "FPSCR");
break;
case SRT_MVFR1:
klen = snprintf(key, MAX_REGNAME_LEN, "MVFR1");
break;
case SRT_MVFR0:
klen = snprintf(key, MAX_REGNAME_LEN, "MVFR0");
break;
case SRT_FPEXC:
klen = snprintf(key, MAX_REGNAME_LEN, "FPEXC");
break;
default:
klen = snprintf(key, MAX_REGNAME_LEN, "???");
break;
}
g_buffer_line_append_text(line, DLC_ASSEMBLY, key, klen, RTT_REGISTER, NULL);
}
/******************************************************************************
* *
* Paramètres : target = registre effectivement ciblé. *
* *
* Description : Crée une réprésentation de registre spécial ARMv7. *
* *
* Retour : Adresse de la structure mise en place. *
* *
* Remarques : - *
* *
******************************************************************************/
static GArchRegister *_g_armv7_special_register_new(SpecRegTarget target)
{
GArmV7SpecialRegister *result; /* Structure à retourner */
if (target >= SRT_CPSR)
goto bad_index;
result = g_object_new(G_TYPE_ARMV7_SPECIAL_REGISTER, NULL);
G_ARM_REGISTER(result)->index = target;
return G_ARCH_REGISTER(result);
bad_index:
return NULL;
}
/******************************************************************************
* *
* Paramètres : target = registre effectivement ciblé. *
* *
* Description : Crée une réprésentation de registre spécial ARMv7. *
* *
* Retour : Adresse de la structure mise en place. *
* *
* Remarques : - *
* *
******************************************************************************/
GArchRegister *g_armv7_special_register_new(SpecRegTarget target)
{
GArchRegister *result; /* Structure à retourner */
result = get_armv7_special_register(target);
return result;
}
/* ---------------------------------------------------------------------------------- */
/* GESTION SOUS FORME DE SINGLETONS */
/* ---------------------------------------------------------------------------------- */
/******************************************************************************
* *
* Paramètres : target = registre effectivement ciblé. *
* *
* Description : Fournit le singleton associé à un registre spécial ARMv7. *
* *
* Retour : Adresse de la structure mise en place. *
* *
* Remarques : - *
* *
******************************************************************************/
static GArchRegister *get_armv7_special_register(SpecRegTarget target)
{
GArchRegister *result; /* Structure à retourner */
size_t new_count; /* Nouvelle taille à considérer*/
size_t i; /* Boucle de parcours */
G_LOCK(_av7_special_reg_mutex);
if (target >= _av7_special_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_special_register_new(target);
if (result == NULL)
goto bad_index;
new_count = target + 1;
_armv7_special_registers = realloc(_armv7_special_registers, new_count * sizeof(GArchRegister *));
for (i = _av7_special_reg_count; i < new_count; i++)
_armv7_special_registers[i] = NULL;
_av7_special_reg_count = new_count;
}
else
result = NULL;
if (_armv7_special_registers[target] == NULL)
{
if (result != NULL)
_armv7_special_registers[target] = result;
else
_armv7_special_registers[target] = _g_armv7_special_register_new(target);
}
result = _armv7_special_registers[target];
bad_index:
G_UNLOCK(_av7_special_reg_mutex);
if (result != NULL)
g_object_ref(G_OBJECT(result));
return result;
}
/******************************************************************************
* *
* Paramètres : - *
* *
* Description : Vide totalement le cache des registres spéciaux ARMv7. *
* *
* Retour : - *
* *
* Remarques : - *
* *
******************************************************************************/
void clean_armv7_special_register_cache(void)
{
size_t i; /* Boucle de parcours */
G_LOCK(_av7_special_reg_mutex);
for (i = 0; i < _av7_special_reg_count; i++)
g_clear_object(&_armv7_special_registers[i]);
if (_armv7_special_registers != NULL)
free(_armv7_special_registers);
_armv7_special_registers = NULL;
_av7_special_reg_count = 0;
G_UNLOCK(_av7_special_reg_mutex);
}