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/* Chrysalide - Outil d'analyse de fichiers binaires
* processor.c - manipulation du processeur de la JVM
*
* Copyright (C) 2009-2012 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 Foobar. If not, see <http://www.gnu.org/licenses/>.
*/
#include "processor.h"
#include "instruction.h"
#include "opcodes.h"
#include "../processor-int.h"
/* Définition du processeur de la JVM (instance) */
struct _GJvmProcessor
{
GArchProcessor parent; /* Instance parente */
};
/* Définition du processeur de la JVM (classe) */
struct _GJvmProcessorClass
{
GArchProcessorClass parent; /* Classe parente */
};
/* Initialise la classe des processeurs de JVM. */
static void g_jvm_processor_class_init(GJvmProcessorClass *);
/* Initialise une instance de processeur de JVM. */
static void g_jvm_processor_init(GJvmProcessor *);
/* Supprime toutes les références externes. */
static void g_jvm_processor_dispose(GJvmProcessor *);
/* Procède à la libération totale de la mémoire. */
static void g_jvm_processor_finalize(GJvmProcessor *);
/* Décode une instruction dans un flux de données. */
static GArchInstruction *g_jvm_processor_decode_instruction(const GJvmProcessor *, const bin_t *, off_t *, off_t, vmpa_t);
/* Indique le type défini par la GLib pour le processeur JVM. */
G_DEFINE_TYPE(GJvmProcessor, g_jvm_processor, G_TYPE_ARCH_PROCESSOR);
/******************************************************************************
* *
* Paramètres : klass = classe à initialiser. *
* *
* Description : Initialise la classe des processeurs de JVM. *
* *
* Retour : - *
* *
* Remarques : - *
* *
******************************************************************************/
static void g_jvm_processor_class_init(GJvmProcessorClass *klass)
{
GObjectClass *object; /* Autre version de la classe */
GArchProcessorClass *proc; /* Encore une autre vision... */
object = G_OBJECT_CLASS(klass);
object->dispose = (GObjectFinalizeFunc/* ! */)g_jvm_processor_dispose;
object->finalize = (GObjectFinalizeFunc)g_jvm_processor_finalize;
proc = G_ARCH_PROCESSOR_CLASS(klass);
proc->decode = (decode_instruction_fc)g_jvm_processor_decode_instruction;
}
/******************************************************************************
* *
* Paramètres : proc = instance à initialiser. *
* *
* Description : Initialise une instance de processeur de JVM. *
* *
* Retour : - *
* *
* Remarques : - *
* *
******************************************************************************/
static void g_jvm_processor_init(GJvmProcessor *proc)
{
GArchProcessor *parent; /* Instance parente */
parent = G_ARCH_PROCESSOR(proc);
parent->endianness = SRE_BIG;
parent->memsize = MDS_32_BITS;
}
/******************************************************************************
* *
* Paramètres : proc = instance d'objet GLib à traiter. *
* *
* Description : Supprime toutes les références externes. *
* *
* Retour : - *
* *
* Remarques : - *
* *
******************************************************************************/
static void g_jvm_processor_dispose(GJvmProcessor *proc)
{
G_OBJECT_CLASS(g_jvm_processor_parent_class)->dispose(G_OBJECT(proc));
}
/******************************************************************************
* *
* Paramètres : bookmark = instance d'objet GLib à traiter. *
* *
* Description : Procède à la libération totale de la mémoire. *
* *
* Retour : - *
* *
* Remarques : - *
* *
******************************************************************************/
static void g_jvm_processor_finalize(GJvmProcessor *proc)
{
G_OBJECT_CLASS(g_jvm_processor_parent_class)->finalize(G_OBJECT(proc));
}
/******************************************************************************
* *
* Paramètres : - *
* *
* Description : Crée le support de l'architecture JVM. *
* *
* Retour : Architecture mise en place. *
* *
* Remarques : - *
* *
******************************************************************************/
GArchProcessor *g_jvm_processor_new(void)
{
GArchProcessor *result; /* Structure à retourner */
result = g_object_new(G_TYPE_JVM_PROCESSOR, NULL);
return result;
}
/******************************************************************************
* *
* Paramètres : proc = architecture visée par la procédure. *
* data = flux de données à analyser. *
* pos = position courante dans ce flux. [OUT] *
* len = taille totale des données à analyser. *
* addr = adresse virtuelle de l'instruction. *
* *
* Description : Décode une instruction dans un flux de données. *
* *
* Retour : Instruction mise en place. *
* *
* Remarques : - *
* *
******************************************************************************/
static GArchInstruction *g_jvm_processor_decode_instruction(const GJvmProcessor *proc, const bin_t *data, off_t *pos, off_t len, vmpa_t addr)
{
GArchInstruction *result; /* Instruction à renvoyer */
bool wide; /* Utilisation d'étendues */
bool care; /* Traitement des opcodes */
JvmOpcodes id; /* Identifiant d'instruction */
id = jvm_guess_next_instruction(data, *pos, len, &wide, &care);
if (id != JOP_COUNT && !care)
{
if (wide) (*pos)++;
(*pos)++;
}
switch (id)
{
case JOP_NOP:
result = jvm_read_instr_nop(data, pos, len, addr, proc);
break;
case JOP_ACONST_NULL:
result = jvm_read_instr_aconst_null(data, pos, len, addr, proc);
break;
case JOP_ICONST_M1:
case JOP_ICONST_0:
case JOP_ICONST_1:
case JOP_ICONST_2:
case JOP_ICONST_3:
case JOP_ICONST_4:
case JOP_ICONST_5:
result = jvm_read_instr_iconst_n(data, pos, len, addr, proc);
break;
case JOP_POP:
result = jvm_read_instr_pop(data, pos, len, addr, proc);
break;
case JOP_POP2:
result = jvm_read_instr_pop2(data, pos, len, addr, proc);
break;
case JOP_DUP:
result = jvm_read_instr_dup(data, pos, len, addr, proc);
break;
case JOP_DUP_X1:
result = jvm_read_instr_dup_x1(data, pos, len, addr, proc);
break;
case JOP_DUP_X2:
result = jvm_read_instr_dup_x2(data, pos, len, addr, proc);
break;
case JOP_DUP2:
result = jvm_read_instr_dup2(data, pos, len, addr, proc);
break;
case JOP_DUP2_X1:
result = jvm_read_instr_dup2_x1(data, pos, len, addr, proc);
break;
case JOP_DUP2_X2:
result = jvm_read_instr_dup2_x2(data, pos, len, addr, proc);
break;
case JOP_IADD:
result = jvm_read_instr_iadd(data, pos, len, addr, proc);
break;
case JOP_I2L:
result = jvm_read_instr_i2l(data, pos, len, addr, proc);
break;
case JOP_I2F:
result = jvm_read_instr_i2f(data, pos, len, addr, proc);
break;
case JOP_I2D:
result = jvm_read_instr_i2d(data, pos, len, addr, proc);
break;
case JOP_L2I:
result = jvm_read_instr_l2i(data, pos, len, addr, proc);
break;
case JOP_L2F:
result = jvm_read_instr_l2f(data, pos, len, addr, proc);
break;
case JOP_L2D:
result = jvm_read_instr_l2d(data, pos, len, addr, proc);
break;
case JOP_F2I:
result = jvm_read_instr_f2i(data, pos, len, addr, proc);
break;
case JOP_F2L:
result = jvm_read_instr_f2l(data, pos, len, addr, proc);
break;
case JOP_F2D:
result = jvm_read_instr_f2d(data, pos, len, addr, proc);
break;
case JOP_D2I:
result = jvm_read_instr_d2i(data, pos, len, addr, proc);
break;
case JOP_D2L:
result = jvm_read_instr_d2l(data, pos, len, addr, proc);
break;
case JOP_D2F:
result = jvm_read_instr_d2f(data, pos, len, addr, proc);
break;
case JOP_I2B:
result = jvm_read_instr_i2b(data, pos, len, addr, proc);
break;
case JOP_I2C:
result = jvm_read_instr_i2c(data, pos, len, addr, proc);
break;
case JOP_I2S:
result = jvm_read_instr_i2s(data, pos, len, addr, proc);
break;
case JOP_ILOAD_0:
case JOP_ILOAD_1:
case JOP_ILOAD_2:
case JOP_ILOAD_3:
result = jvm_read_instr_iload_n(data, pos, len, addr, proc);
break;
case JOP_ALOAD_0:
case JOP_ALOAD_1:
case JOP_ALOAD_2:
case JOP_ALOAD_3:
result = jvm_read_instr_aload_n(data, pos, len, addr, proc);
break;
case JOP_ISTORE_0:
case JOP_ISTORE_1:
case JOP_ISTORE_2:
case JOP_ISTORE_3:
result = jvm_read_instr_istore_n(data, pos, len, addr, proc);
break;
case JOP_IRETURN:
result = jvm_read_instr_ireturn(data, pos, len, addr, proc);
break;
case JOP_LRETURN:
result = jvm_read_instr_lreturn(data, pos, len, addr, proc);
break;
case JOP_FRETURN:
result = jvm_read_instr_freturn(data, pos, len, addr, proc);
break;
case JOP_DRETURN:
result = jvm_read_instr_dreturn(data, pos, len, addr, proc);
break;
case JOP_ARETURN:
result = jvm_read_instr_areturn(data, pos, len, addr, proc);
break;
case JOP_RETURN:
result = jvm_read_instr_return(data, pos, len, addr, proc);
break;
case JOP_GETSTATIC:
result = jvm_read_instr_getstatic(data, pos, len, addr, proc);
break;
case JOP_INVOKE_VIRTUAL:
result = jvm_read_instr_invokevirtual(data, pos, len, addr, proc);
break;
case JOP_INVOKE_SPECIAL:
result = jvm_read_instr_invokespecial(data, pos, len, addr, proc);
break;
case JOP_INVOKE_STATIC:
result = jvm_read_instr_invokestatic(data, pos, len, addr, proc);
break;
default:
result = NULL;
break;
}
return result;
}
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