/* 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 .
*/
#include "simd.h"
#include
#include
#include
#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 *);
/* 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_t *);
/* Sauvegarde un registre dans une mémoire tampon. */
static bool g_armv7_simd_register_serialize(const GArmV7SIMDRegister *, GAsmStorage *, packed_buffer_t *);
/* ------------------------ 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. *
* *
* Description : Traduit un registre en version humainement lisible. *
* *
* Retour : - *
* *
* Remarques : - *
* *
******************************************************************************/
static void g_armv7_simd_register_print(const GArmV7SIMDRegister *reg, GBufferLine *line)
{
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, DLC_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_t *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_t *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];
bad_index:
G_UNLOCK(_av7_simd_reg_mutex);
if (result != NULL)
g_object_ref(G_OBJECT(result));
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_clear_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);
}