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/* OpenIDA - Outil d'analyse de fichiers binaires
* processor.c - gestion de l'architecture mips
*
* Copyright (C) 2009 Cyrille Bagard
*
* This file is part of OpenIDA.
*
* OpenIDA 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.
*
* OpenIDA 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 "../processor-int.h"
#include "opcodes.h"
/* Définition du processeur de la mips (instance) */
struct _GMipsProcessor
{
GArchProcessor parent; /* Instance parente */
};
/* Définition du processeur de la mips (classe) */
struct _GMipsProcessorClass
{
GArchProcessorClass parent; /* Classe parente */
};
/* Initialise la classe des lignes de descriptions initiales. */
static void g_mips_processor_class_init(GMipsProcessorClass *);
/* Initialise la classe des lignes de descriptions initiales. */
static void g_mips_processor_init(GMipsProcessor *);
/* Décode une instruction dans un flux de données. */
static GArchInstruction *g_mips_processor_decode_instruction(const GMipsProcessor *, const bin_t *, off_t *, off_t, vmpa_t);
/* Indique le type défini par la GLib pour le processeur mips. */
G_DEFINE_TYPE(GMipsProcessor, g_mips_processor, G_TYPE_ARCH_PROCESSOR);
/******************************************************************************
* *
* Paramètres : klass = classe à initialiser. *
* *
* Description : Initialise la classe des lignes de descriptions initiales. *
* *
* Retour : - *
* *
* Remarques : - *
* *
******************************************************************************/
static void g_mips_processor_class_init(GMipsProcessorClass *klass)
{
}
/******************************************************************************
* *
* Paramètres : proc = instance à initialiser. *
* *
* Description : Initialise la classe des lignes de descriptions initiales. *
* *
* Retour : - *
* *
* Remarques : - *
* *
******************************************************************************/
static void g_mips_processor_init(GMipsProcessor *proc)
{
GArchProcessor *parent; /* Instance parente */
parent = G_ARCH_PROCESSOR(proc);
parent->endianness = SRE_BIG;
parent->decode = (decode_instruction_fc)g_mips_processor_decode_instruction;
}
/******************************************************************************
* *
* Paramètres : - *
* *
* Description : Crée le support de l'architecture mips. *
* *
* Retour : Architecture mise en place. *
* *
* Remarques : - *
* *
******************************************************************************/
GArchProcessor *g_mips_processor_new(void)
{
GArchProcessor *result; /* Structure à retourner */
result = g_object_new(G_TYPE_MIPS_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_mips_processor_decode_instruction(const GMipsProcessor *proc, const bin_t *data, off_t *pos, off_t len, vmpa_t addr)
{
GArchInstruction *result; /* Instruction à renvoyer */
MipsOpcodes id; /* Identifiant d'instruction */
id = mips_guess_next_instruction(data, *pos, len);
switch (id)
{
case MOP_NOP:
result = mips_read_instr_nop(data, pos, len, addr, proc);
break;
case MOP_SRA:
result = mips_read_instr_shift_word_right_arithmetic(data, pos, len, addr, proc);
break;
case MOP_JR:
result = mips_read_instr_jump_register(data, pos, len, addr, proc);
break;
case MOP_JALR:
case MOP_JALR_HB:
result = mips_read_instr_jump_and_link_register(data, pos, len, addr, proc);
break;
case MOP_ADDU:
result = mips_read_instr_add_unsigned(data, pos, len, addr, proc);
break;
case MOP_SUB:
result = mips_read_instr_subtract_word(data, pos, len, addr, proc);
break;
case MOP_SUBU:
result = mips_read_instr_subtract_unsigned_word(data, pos, len, addr, proc);
break;
case MOP_AND:
result = mips_read_instr_and(data, pos, len, addr, proc);
break;
case MOP_BGEZAL:
result = mips_read_instr_branch_on_greater_than_or_equal_to_zero_and_link(data, pos, len, addr, proc);
break;
case MOP_BEQ:
result = mips_read_instr_branch_on_equal(data, pos, len, addr, proc);
break;
case MOP_BNE:
result = mips_read_instr_branch_on_not_equal(data, pos, len, addr, proc);
break;
case MOP_ADDIU:
result = mips_read_instr_add_immediate_unsigned(data, pos, len, addr, proc);
break;
case MOP_BEQL:
result = mips_read_instr_branch_on_equal_likely(data, pos, len, addr, proc);
break;
case MOP_LW:
result = mips_read_instr_load_word(data, pos, len, addr, proc);
break;
case MOP_LUI:
result = mips_read_instr_load_upper_immediate(data, pos, len, addr, proc);
break;
case MOP_LBU:
result = mips_read_instr_load_byte_unisgned(data, pos, len, addr, proc);
break;
case MOP_SB:
result = mips_read_instr_store_byte(data, pos, len, addr, proc);
break;
case MOP_SW:
result = mips_read_instr_store_word(data, pos, len, addr, proc);
break;
default:
result = NULL;
break;
}
return result;
}
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