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/* Chrysalide - Outil d'analyse de fichiers binaires
* processor.c - manipulation du processeur de la VM Dalvik
*
* Copyright (C) 2010-2012 Cyrille Bagard
*
* This file is part of Chrysalide.
*
* 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 <assert.h>
#include "context.h"
#include "instruction.h"
#include "opcodes/opcodes.h"
#include "pseudo/fill.h"
#include "pseudo/switch.h"
#include "../processor-int.h"
#include "../../format/dex/dex.h"
/* Définition du processeur de la VM Dalvik (instance) */
struct _GDalvikProcessor
{
GArchProcessor parent; /* Instance parente */
};
/* Définition du processeur de la VM Dalvik (classe) */
struct _GDalvikProcessorClass
{
GArchProcessorClass parent; /* Classe parente */
};
/* Initialise la classe des processeurs de VM Dalvik. */
static void g_dalvik_processor_class_init(GDalvikProcessorClass *);
/* Initialise une instance de processeur de VM Dalvik. */
static void g_dalvik_processor_init(GDalvikProcessor *);
/* Supprime toutes les références externes. */
static void g_dalvik_processor_dispose(GDalvikProcessor *);
/* Procède à la libération totale de la mémoire. */
static void g_dalvik_processor_finalize(GDalvikProcessor *);
/* Fournit un contexte pour l'exécution du processeur Dalvik. */
static GDalvikContext *g_dalvik_processor_get_context(const GDalvikProcessor *);
/* Fournit un contexte pour la décompilation Dalvik. */
static GDalvikDContext *g_dalvik_processor_get_decomp_context(const GDalvikProcessor *);
/* Décode une instruction dans un flux de données. */
static GArchInstruction *g_dalvik_processor_disassemble(const GArchProcessor *, GDalvikContext *, const GBinContent *, vmpa2t *, GExeFormat *);
/* Décode une pseudo-instruction dans un flux de données. */
static GArchInstruction *g_dalvik_processor_disassemble_pseudo(const GArchProcessor *, GDalvikContext *, const GBinContent *, vmpa2t *, uint8_t);
/* Indique le type défini par la GLib pour le processeur DALVIK. */
G_DEFINE_TYPE(GDalvikProcessor, g_dalvik_processor, G_TYPE_ARCH_PROCESSOR);
/******************************************************************************
* *
* Paramètres : klass = classe à initialiser. *
* *
* Description : Initialise la classe des processeurs de VM Dalvik. *
* *
* Retour : - *
* *
* Remarques : - *
* *
******************************************************************************/
static void g_dalvik_processor_class_init(GDalvikProcessorClass *klass)
{
GObjectClass *object; /* Autre version de la classe */
GArchProcessorClass *proc; /* Encore une autre vision... */
object = G_OBJECT_CLASS(klass);
object->dispose = (GObjectFinalizeFunc/* ! */)g_dalvik_processor_dispose;
object->finalize = (GObjectFinalizeFunc)g_dalvik_processor_finalize;
proc = G_ARCH_PROCESSOR_CLASS(klass);
proc->disassemble = (disass_instr_fc)g_dalvik_processor_disassemble;
}
/******************************************************************************
* *
* Paramètres : proc = instance à initialiser. *
* *
* Description : Initialise une instance de processeur de VM Dalvik. *
* *
* Retour : - *
* *
* Remarques : - *
* *
******************************************************************************/
static void g_dalvik_processor_init(GDalvikProcessor *proc)
{
GArchProcessor *parent; /* Instance parente */
parent = G_ARCH_PROCESSOR(proc);
parent->endianness = SRE_LITTLE;
parent->memsize = MDS_32_BITS;
parent->inssize = MDS_16_BITS;
parent->get_ctx = (get_processor_context_fc)g_dalvik_processor_get_context;
parent->get_dec_ctx = (get_decomp_context_fc)g_dalvik_processor_get_decomp_context;
}
/******************************************************************************
* *
* Paramètres : proc = instance d'objet GLib à traiter. *
* *
* Description : Supprime toutes les références externes. *
* *
* Retour : - *
* *
* Remarques : - *
* *
******************************************************************************/
static void g_dalvik_processor_dispose(GDalvikProcessor *proc)
{
G_OBJECT_CLASS(g_dalvik_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_dalvik_processor_finalize(GDalvikProcessor *proc)
{
G_OBJECT_CLASS(g_dalvik_processor_parent_class)->finalize(G_OBJECT(proc));
}
/******************************************************************************
* *
* Paramètres : - *
* *
* Description : Crée le support de l'architecture Dalvik. *
* *
* Retour : Architecture mise en place. *
* *
* Remarques : - *
* *
******************************************************************************/
GArchProcessor *g_dalvik_processor_new(void)
{
GArchProcessor *result; /* Structure à retourner */
result = g_object_new(G_TYPE_DALVIK_PROCESSOR, NULL);
return result;
}
/******************************************************************************
* *
* Paramètres : proc = architecture, spectatrice ici. *
* *
* Description : Fournit un contexte pour l'exécution du processeur Dalvik. *
* *
* Retour : Contexte mis en place. *
* *
* Remarques : - *
* *
******************************************************************************/
static GDalvikContext *g_dalvik_processor_get_context(const GDalvikProcessor *proc)
{
return g_dalvik_context_new();
}
/******************************************************************************
* *
* Paramètres : proc = architecture, spectatrice ici. *
* *
* Description : Fournit un contexte pour la décompilation Dalvik. *
* *
* Retour : Contexte mis en place. *
* *
* Remarques : - *
* *
******************************************************************************/
static GDalvikDContext *g_dalvik_processor_get_decomp_context(const GDalvikProcessor *proc)
{
return g_dalvik_dcontext_new();
}
/******************************************************************************
* *
* Paramètres : proc = architecture visée par la procédure. *
* ctx = contexte lié à l'exécution du processeur. *
* content = flux de données à analyser. *
* pos = position courante dans ce flux. [OUT] *
* format = format du fichier contenant le code. *
* *
* Description : Désassemble une instruction dans un flux de données. *
* *
* Retour : Instruction mise en place ou NULL en cas d'échec. *
* *
* Remarques : - *
* *
******************************************************************************/
static GArchInstruction *g_dalvik_processor_disassemble(const GArchProcessor *proc, GDalvikContext *ctx, const GBinContent *content, vmpa2t *pos, GExeFormat *format)
{
GArchInstruction *result; /* Instruction à renvoyer */
uint8_t raw8; /* Donnée de 8 bits à analyser */
DalvikOpcodes id; /* Identifiant d'instruction */
static const disass_instr_fc decodings[DOP_COUNT] = {
[DOP_NOP] = dalvik_read_instr_nop,
[DOP_MOVE] = dalvik_read_instr_move,
[DOP_MOVE_FROM_16] = dalvik_read_instr_move_from16,
[DOP_MOVE_16] = dalvik_read_instr_move_16,
[DOP_MOVE_WIDE] = dalvik_read_instr_move_wide,
[DOP_MOVE_WIDE_FROM_16] = dalvik_read_instr_move_wide_from16,
[DOP_MOVE_WIDE_16] = dalvik_read_instr_move_wide_16,
[DOP_MOVE_OBJECT] = dalvik_read_instr_move_object,
[DOP_MOVE_OBJECT_FROM_16] = dalvik_read_instr_move_object_from16,
[DOP_MOVE_OBJECT_16] = dalvik_read_instr_move_object_16,
[DOP_MOVE_RESULT] = dalvik_read_instr_move_result,
[DOP_MOVE_RESULT_WIDE] = dalvik_read_instr_move_result_wide,
[DOP_MOVE_RESULT_OBJECT] = dalvik_read_instr_move_result_object,
[DOP_MOVE_EXCEPTION] = dalvik_read_instr_move_exception,
[DOP_RETURN_VOID] = dalvik_read_instr_return_void,
[DOP_RETURN] = dalvik_read_instr_return,
[DOP_RETURN_WIDE] = dalvik_read_instr_return_wide,
[DOP_RETURN_OBJECT] = dalvik_read_instr_return_object,
[DOP_CONST_4] = dalvik_read_instr_const_4,
[DOP_CONST_16] = dalvik_read_instr_const_16,
[DOP_CONST] = dalvik_read_instr_const,
[DOP_CONST_HIGH16] = dalvik_read_instr_const_high16,
[DOP_CONST_WIDE_16] = dalvik_read_instr_const_wide_16,
[DOP_CONST_WIDE_32] = dalvik_read_instr_const_wide_32,
[DOP_CONST_WIDE] = dalvik_read_instr_const_wide,
[DOP_CONST_WIDE_HIGH16] = dalvik_read_instr_const_wide_high16,
[DOP_CONST_STRING] = dalvik_read_instr_const_string,
[DOP_CONST_STRING_JUMBO] = dalvik_read_instr_const_string_jumbo,
[DOP_CONST_CLASS] = dalvik_read_instr_const_class,
[DOP_MONITOR_ENTER] = dalvik_read_instr_monitor_enter,
[DOP_MONITOR_EXIT] = dalvik_read_instr_monitor_exit,
[DOP_CHECK_CAST] = dalvik_read_instr_check_cast,
[DOP_INSTANCE_OF] = dalvik_read_instr_instance_of,
[DOP_ARRAY_LENGTH] = dalvik_read_instr_array_length,
[DOP_NEW_INSTANCE] = dalvik_read_instr_new_instance,
[DOP_NEW_ARRAY] = dalvik_read_instr_new_array,
[DOP_FILLED_NEW_ARRAY] = dalvik_read_instr_filled_new_array,
[DOP_FILLED_NEW_ARRAY_RANGE]= dalvik_read_instr_filled_new_array_range,
[DOP_FILL_ARRAY_DATA] = dalvik_read_instr_fill_array_data,
[DOP_THROW] = dalvik_read_instr_throw,
[DOP_GOTO] = dalvik_read_instr_goto,
[DOP_GOTO_16] = dalvik_read_instr_goto_16,
[DOP_GOTO_32] = dalvik_read_instr_goto_32,
[DOP_PACKED_SWITCH] = dalvik_read_instr_packed_switch,
[DOP_SPARSE_SWITCH] = dalvik_read_instr_sparse_switch,
[DOP_CMPL_FLOAT] = dalvik_read_instr_cmpl_float,
[DOP_CMPG_FLOAT] = dalvik_read_instr_cmpg_float,
[DOP_CMPL_DOUBLE] = dalvik_read_instr_cmpl_double,
[DOP_CMPG_DOUBLE] = dalvik_read_instr_cmpg_double,
[DOP_CMP_LONG] = dalvik_read_instr_cmp_long,
[DOP_IF_EQ] = dalvik_read_instr_if_eq,
[DOP_IF_NE] = dalvik_read_instr_if_ne,
[DOP_IF_LT] = dalvik_read_instr_if_lt,
[DOP_IF_GE] = dalvik_read_instr_if_ge,
[DOP_IF_GT] = dalvik_read_instr_if_gt,
[DOP_IF_LE] = dalvik_read_instr_if_le,
[DOP_IF_EQZ] = dalvik_read_instr_if_eqz,
[DOP_IF_NEZ] = dalvik_read_instr_if_nez,
[DOP_IF_LTZ] = dalvik_read_instr_if_ltz,
[DOP_IF_GEZ] = dalvik_read_instr_if_gez,
[DOP_IF_GTZ] = dalvik_read_instr_if_gtz,
[DOP_IF_LEZ] = dalvik_read_instr_if_lez,
[DOP_AGET] = dalvik_read_instr_aget,
[DOP_AGET_WIDE] = dalvik_read_instr_aget_wide,
[DOP_AGET_OBJECT] = dalvik_read_instr_aget_object,
[DOP_AGET_BOOLEAN] = dalvik_read_instr_aget_boolean,
[DOP_AGET_BYTE] = dalvik_read_instr_aget_byte,
[DOP_AGET_CHAR] = dalvik_read_instr_aget_char,
[DOP_AGET_SHORT] = dalvik_read_instr_aget_short,
[DOP_APUT] = dalvik_read_instr_aput,
[DOP_APUT_WIDE] = dalvik_read_instr_aput_wide,
[DOP_APUT_OBJECT] = dalvik_read_instr_aput_object,
[DOP_APUT_BOOLEAN] = dalvik_read_instr_aput_boolean,
[DOP_APUT_BYTE] = dalvik_read_instr_aput_byte,
[DOP_APUT_CHAR] = dalvik_read_instr_aput_char,
[DOP_APUT_SHORT] = dalvik_read_instr_aput_short,
[DOP_IGET] = dalvik_read_instr_iget,
[DOP_IGET_WIDE] = dalvik_read_instr_iget_wide,
[DOP_IGET_OBJECT] = dalvik_read_instr_iget_object,
[DOP_IGET_BOOLEAN] = dalvik_read_instr_iget_boolean,
[DOP_IGET_BYTE] = dalvik_read_instr_iget_byte,
[DOP_IGET_CHAR] = dalvik_read_instr_iget_char,
[DOP_IGET_SHORT] = dalvik_read_instr_iget_short,
[DOP_IPUT] = dalvik_read_instr_iput,
[DOP_IPUT_WIDE] = dalvik_read_instr_iput_wide,
[DOP_IPUT_OBJECT] = dalvik_read_instr_iput_object,
[DOP_IPUT_BOOLEAN] = dalvik_read_instr_iput_boolean,
[DOP_IPUT_BYTE] = dalvik_read_instr_iput_byte,
[DOP_IPUT_CHAR] = dalvik_read_instr_iput_char,
[DOP_IPUT_SHORT] = dalvik_read_instr_iput_short,
[DOP_SGET] = dalvik_read_instr_sget,
[DOP_SGET_WIDE] = dalvik_read_instr_sget_wide,
[DOP_SGET_OBJECT] = dalvik_read_instr_sget_object,
[DOP_SGET_BOOLEAN] = dalvik_read_instr_sget_boolean,
[DOP_SGET_BYTE] = dalvik_read_instr_sget_byte,
[DOP_SGET_CHAR] = dalvik_read_instr_sget_char,
[DOP_SGET_SHORT] = dalvik_read_instr_sget_short,
[DOP_SPUT] = dalvik_read_instr_sput,
[DOP_SPUT_WIDE] = dalvik_read_instr_sput_wide,
[DOP_SPUT_OBJECT] = dalvik_read_instr_sput_object,
[DOP_SPUT_BOOLEAN] = dalvik_read_instr_sput_boolean,
[DOP_SPUT_BYTE] = dalvik_read_instr_sput_byte,
[DOP_SPUT_CHAR] = dalvik_read_instr_sput_char,
[DOP_SPUT_SHORT] = dalvik_read_instr_sput_short,
[DOP_INVOKE_VIRTUAL] = dalvik_read_instr_invoke_virtual,
[DOP_INVOKE_SUPER] = dalvik_read_instr_invoke_super,
[DOP_INVOKE_DIRECT] = dalvik_read_instr_invoke_direct,
[DOP_INVOKE_STATIC] = dalvik_read_instr_invoke_static,
[DOP_INVOKE_INTERFACE] = dalvik_read_instr_invoke_interface,
[DOP_INVOKE_VIRTUAL_RANGE] = dalvik_read_instr_invoke_virtual_range,
[DOP_INVOKE_SUPER_RANGE] = dalvik_read_instr_invoke_super_range,
[DOP_INVOKE_DIRECT_RANGE] = dalvik_read_instr_invoke_direct_range,
[DOP_INVOKE_STATIC_RANGE] = dalvik_read_instr_invoke_static_range,
[DOP_INVOKE_INTERFACE_RANGE]= dalvik_read_instr_invoke_interface_range,
[DOP_NEG_INT] = dalvik_read_instr_neg_int,
[DOP_NOT_INT] = dalvik_read_instr_not_int,
[DOP_NEG_LONG] = dalvik_read_instr_neg_long,
[DOP_NOT_LONG] = dalvik_read_instr_not_long,
[DOP_NEG_FLOAT] = dalvik_read_instr_neg_float,
[DOP_NEG_DOUBLE] = dalvik_read_instr_neg_double,
[DOP_TO_INT_LONG] = dalvik_read_instr_int_to_long,
[DOP_TO_INT_FLOAT] = dalvik_read_instr_int_to_float,
[DOP_TO_INT_DOUBLE] = dalvik_read_instr_int_to_double,
[DOP_TO_LONG_INT] = dalvik_read_instr_long_to_int,
[DOP_TO_LONG_FLOAT] = dalvik_read_instr_long_to_float,
[DOP_TO_LONG_DOUBLE] = dalvik_read_instr_long_to_double,
[DOP_TO_FLOAT_INT] = dalvik_read_instr_float_to_int,
[DOP_TO_FLOAT_LONG] = dalvik_read_instr_float_to_long,
[DOP_TO_FLOAT_DOUBLE] = dalvik_read_instr_float_to_double,
[DOP_TO_DOUBLE_INT] = dalvik_read_instr_double_to_int,
[DOP_TO_DOUBLE_LONG] = dalvik_read_instr_double_to_long,
[DOP_TO_DOUBLE_FLOAT] = dalvik_read_instr_double_to_float,
[DOP_TO_INT_BYTE] = dalvik_read_instr_int_to_byte,
[DOP_TO_INT_CHAR] = dalvik_read_instr_int_to_char,
[DOP_TO_INT_SHORT] = dalvik_read_instr_int_to_short,
[DOP_ADD_INT] = dalvik_read_instr_add_int,
[DOP_SUB_INT] = dalvik_read_instr_sub_int,
[DOP_MUL_INT] = dalvik_read_instr_mul_int,
[DOP_DIV_INT] = dalvik_read_instr_div_int,
[DOP_REM_INT] = dalvik_read_instr_rem_int,
[DOP_AND_INT] = dalvik_read_instr_and_int,
[DOP_OR_INT] = dalvik_read_instr_or_int,
[DOP_XOR_INT] = dalvik_read_instr_xor_int,
[DOP_SHL_INT] = dalvik_read_instr_shl_int,
[DOP_SHR_INT] = dalvik_read_instr_shr_int,
[DOP_USHR_INT] = dalvik_read_instr_ushr_int,
[DOP_ADD_LONG] = dalvik_read_instr_add_long,
[DOP_SUB_LONG] = dalvik_read_instr_sub_long,
[DOP_MUL_LONG] = dalvik_read_instr_mul_long,
[DOP_DIV_LONG] = dalvik_read_instr_div_long,
[DOP_REM_LONG] = dalvik_read_instr_rem_long,
[DOP_AND_LONG] = dalvik_read_instr_and_long,
[DOP_OR_LONG] = dalvik_read_instr_or_long,
[DOP_XOR_LONG] = dalvik_read_instr_xor_long,
[DOP_SHL_LONG] = dalvik_read_instr_shl_long,
[DOP_SHR_LONG] = dalvik_read_instr_shr_long,
[DOP_USHR_LONG] = dalvik_read_instr_ushr_long,
[DOP_ADD_FLOAT] = dalvik_read_instr_add_float,
[DOP_SUB_FLOAT] = dalvik_read_instr_sub_float,
[DOP_MUL_FLOAT] = dalvik_read_instr_mul_float,
[DOP_DIV_FLOAT] = dalvik_read_instr_div_float,
[DOP_REM_FLOAT] = dalvik_read_instr_rem_float,
[DOP_ADD_DOUBLE] = dalvik_read_instr_add_double,
[DOP_SUB_DOUBLE] = dalvik_read_instr_sub_double,
[DOP_MUL_DOUBLE] = dalvik_read_instr_mul_double,
[DOP_DIV_DOUBLE] = dalvik_read_instr_div_double,
[DOP_REM_DOUBLE] = dalvik_read_instr_rem_double,
[DOP_ADD_INT_2ADDR] = dalvik_read_instr_add_int_2addr,
[DOP_SUB_INT_2ADDR] = dalvik_read_instr_sub_int_2addr,
[DOP_MUL_INT_2ADDR] = dalvik_read_instr_mul_int_2addr,
[DOP_DIV_INT_2ADDR] = dalvik_read_instr_div_int_2addr,
[DOP_REM_INT_2ADDR] = dalvik_read_instr_rem_int_2addr,
[DOP_AND_INT_2ADDR] = dalvik_read_instr_and_int_2addr,
[DOP_OR_INT_2ADDR] = dalvik_read_instr_or_int_2addr,
[DOP_XOR_INT_2ADDR] = dalvik_read_instr_xor_int_2addr,
[DOP_SHL_INT_2ADDR] = dalvik_read_instr_shl_int_2addr,
[DOP_SHR_INT_2ADDR] = dalvik_read_instr_shr_int_2addr,
[DOP_USHR_INT_2ADDR] = dalvik_read_instr_ushr_int_2addr,
[DOP_ADD_LONG_2ADDR] = dalvik_read_instr_add_long_2addr,
[DOP_SUB_LONG_2ADDR] = dalvik_read_instr_sub_long_2addr,
[DOP_MUL_LONG_2ADDR] = dalvik_read_instr_mul_long_2addr,
[DOP_DIV_LONG_2ADDR] = dalvik_read_instr_div_long_2addr,
[DOP_REM_LONG_2ADDR] = dalvik_read_instr_rem_long_2addr,
[DOP_AND_LONG_2ADDR] = dalvik_read_instr_and_long_2addr,
[DOP_OR_LONG_2ADDR] = dalvik_read_instr_or_long_2addr,
[DOP_XOR_LONG_2ADDR] = dalvik_read_instr_xor_long_2addr,
[DOP_SHL_LONG_2ADDR] = dalvik_read_instr_shl_long_2addr,
[DOP_SHR_LONG_2ADDR] = dalvik_read_instr_shr_long_2addr,
[DOP_USHR_LONG_2ADDR] = dalvik_read_instr_ushr_long_2addr,
[DOP_ADD_FLOAT_2ADDR] = dalvik_read_instr_add_float_2addr,
[DOP_SUB_FLOAT_2ADDR] = dalvik_read_instr_sub_float_2addr,
[DOP_MUL_FLOAT_2ADDR] = dalvik_read_instr_mul_float_2addr,
[DOP_DIV_FLOAT_2ADDR] = dalvik_read_instr_div_float_2addr,
[DOP_REM_FLOAT_2ADDR] = dalvik_read_instr_rem_float_2addr,
[DOP_ADD_DOUBLE_2ADDR] = dalvik_read_instr_add_double_2addr,
[DOP_SUB_DOUBLE_2ADDR] = dalvik_read_instr_sub_double_2addr,
[DOP_MUL_DOUBLE_2ADDR] = dalvik_read_instr_mul_double_2addr,
[DOP_DIV_DOUBLE_2ADDR] = dalvik_read_instr_div_double_2addr,
[DOP_REM_DOUBLE_2ADDR] = dalvik_read_instr_rem_double_2addr,
[DOP_ADD_INT_LIT16] = dalvik_read_instr_add_int_lit16,
[DOP_RSUB_INT] = dalvik_read_instr_rsub_int,
[DOP_MUL_INT_LIT16] = dalvik_read_instr_mul_int_lit16,
[DOP_DIV_INT_LIT16] = dalvik_read_instr_div_int_lit16,
[DOP_REM_INT_LIT16] = dalvik_read_instr_rem_int_lit16,
[DOP_AND_INT_LIT16] = dalvik_read_instr_and_int_lit16,
[DOP_OR_INT_LIT16] = dalvik_read_instr_or_int_lit16,
[DOP_XOR_INT_LIT16] = dalvik_read_instr_xor_int_lit16,
[DOP_ADD_INT_LIT8] = dalvik_read_instr_add_int_lit8,
[DOP_RSUB_INT_LIT8] = dalvik_read_instr_rsub_int_lit8,
[DOP_MUL_INT_LIT8] = dalvik_read_instr_mul_int_lit8,
[DOP_DIV_INT_LIT8] = dalvik_read_instr_div_int_lit8,
[DOP_REM_INT_LIT8] = dalvik_read_instr_rem_int_lit8,
[DOP_AND_INT_LIT8] = dalvik_read_instr_and_int_lit8,
[DOP_OR_INT_LIT8] = dalvik_read_instr_or_int_lit8,
[DOP_XOR_INT_LIT8] = dalvik_read_instr_xor_int_lit8,
[DOP_SHL_INT_LIT8] = dalvik_read_instr_shl_int_lit8,
[DOP_SHR_INT_LIT8] = dalvik_read_instr_shr_int_lit8,
[DOP_USHR_INT_LIT8] = dalvik_read_instr_ushr_int_lit8
};
/* Données brutes associées à une instruction ? */
result = g_dalvik_context_get_raw_data(ctx, content, pos);
if (result != NULL) goto gdpd_done;
/* Pseudo-instruction... */
if (!g_binary_content_read_u8(content, pos, &raw8))
return NULL;
result = g_dalvik_processor_disassemble_pseudo(proc, ctx, content, pos, raw8);
if (result != NULL) goto gdpd_done;
/* ... ou instruction classique */
assert(raw8 < DOP_COUNT);
id = (DalvikOpcodes)raw8;
if (decodings[id] != NULL)
result = decodings[id](proc, G_PROC_CONTEXT(ctx), content, pos, format);
gdpd_done:
return result;
}
/******************************************************************************
* *
* Paramètres : proc = architecture visée par la procédure. *
* data = flux de données à analyser. *
* pos = position courante dans ce flux. [OUT] *
* end = limite des données à analyser. *
* addr = adresse virtuelle de l'instruction. *
* low8 = 8 bits de poids faible déjà lus. *
* *
* Description : Décode une pseudo-instruction dans un flux de données. *
* *
* Retour : Instruction mise en place ou NULL si aucune trouvée. *
* *
* Remarques : - *
* *
******************************************************************************/
static GArchInstruction *g_dalvik_processor_disassemble_pseudo(const GArchProcessor *proc, GDalvikContext *ctx, const GBinContent *content, vmpa2t *pos, uint8_t low8)
{
GArchInstruction *result; /* Instruction à renvoyer */
vmpa2t tmp; /* Position modifiable */
uint8_t high8; /* Nouvelle octet à venir lire */
uint16_t ident; /* Valeur lue dans le code */
/* Vérification astucieuse et rapide...*/
if (low8 != 0x00 /* DOP_NOP */)
return NULL;
result = NULL;
copy_vmpa(&tmp, pos);
if (!g_binary_content_read_u8(content, pos, &high8))
goto gdpdp_exit;
ident = high8 << 8 | low8;
switch (ident)
{
case DPO_PACKED_SWITCH:
case DPO_SPARSE_SWITCH:
result = g_dalvik_switch_instr_new(ident, ctx, content, pos);
break;
case DPO_FILL_ARRAY_DATA:
result = g_dalvik_fill_instr_new(ident, ctx, content, pos);
break;
default:
result = NULL;
break;
}
gdpdp_exit:
if (result == NULL)
copy_vmpa(pos, &tmp);
return result;
}
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