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/* OpenIDA - Outil d'analyse de fichiers binaires
* instruction.c - gestion des instructions de la VM Dalvik
*
* Copyright (C) 2010 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 "instruction.h"
#include "translate.h"
#include "../instruction-int.h"
/* Définition générique d'une instruction d'architecture Dalvik (instance) */
struct _GDalvikInstruction
{
GArchInstruction parent; /* A laisser en premier */
DalvikOpcodes type; /* Position dans la liste */
};
/* Définition générique d'une instruction d'architecture Dalvik (classe) */
struct _GDalvikInstructionClass
{
GArchInstructionClass parent; /* A laisser en premier */
};
/* Initialise la classe des instructions pour Dalvik. */
static void g_dalvik_instruction_class_init(GDalvikInstructionClass *);
/* Initialise une instance d'opérande d'architecture Dalvik. */
static void g_dalvik_instruction_init(GDalvikInstruction *);
/* --------------------- AIDE A LA MISE EN PLACE D'INSTRUCTIONS --------------------- */
/* Répertoire de toutes les instructions Dalvik */
typedef struct _dalvik_instruction
{
bin_t opcode; /* Opcode de l'instruction */
const char *keyword; /* Mot clef de la commande */
decomp_instr_fc decomp; /* Procédure de décompilation */
} dalvik_instruction;
static dalvik_instruction _instructions[DOP_COUNT] = {
[DOP_NOP] = { 0x00, "nop" },
[DOP_MOVE] = { 0x01, "move" },
[DOP_MOVE_OBJECT] = { 0x07, "move-object" },
[DOP_MOVE_RESULT] = { 0x0a, "move-result" },
[DOP_MOVE_RESULT_WIDE] = { 0x0b, "move-result-wide" },
[DOP_MOVE_RESULT_OBJECT] = { 0x0c, "move-result-object" },
[DOP_MOVE_EXCEPTION] = { 0x0d, "move-exception" },
[DOP_RETURN_VOID] = { 0x0e, "return-void", dalvik_decomp_instr_return_void },
[DOP_RETURN] = { 0x0f, "return", dalvik_decomp_instr_return },
[DOP_RETURN_WIDE] = { 0x10, "return-wide", dalvik_decomp_instr_return },
[DOP_RETURN_OBJECT] = { 0x11, "return-object", dalvik_decomp_instr_return },
[DOP_CONST_4] = { 0x12, "const/4", dalvik_decomp_instr_const },
[DOP_CONST_16] = { 0x13, "const/16", dalvik_decomp_instr_const },
[DOP_CONST] = { 0x14, "const" },
[DOP_CONST_HIGH16] = { 0x15, "const/high16" },
[DOP_CONST_WIDE_16] = { 0x16, "const-wide/16" },
[DOP_CONST_WIDE] = { 0x18, "const-wide" },
[DOP_CONST_STRING] = { 0x1a, "const-string" },
[DOP_CHECK_CAST] = { 0x1f, "check-cast" },
[DOP_ARRAY_LENGTH] = { 0x21, "array-length", dalvik_decomp_instr_array_length },
[DOP_NEW_INSTANCE] = { 0x22, "new-instance" },
[DOP_NEW_ARRAY] = { 0x23, "new-array" },
[DOP_GOTO] = { 0x28, "goto" },
[DOP_GOTO_16] = { 0x29, "goto/16" },
[DOP_GOTO_32] = { 0x2a, "goto/32" },
[DOP_CMPL_FLOAT] = { 0x2d, "cmp-long" },
[DOP_CMPG_FLOAT] = { 0x2e, "cmpg-float" },
[DOP_CMPL_DOUBLE] = { 0x2f, "cmpl-double" },
[DOP_CMPG_DOUBLE] = { 0x30, "cmpg-double" },
[DOP_CMP_LONG] = { 0x31, "cmp-long" },
[DOP_IF_EQ] = { 0x32, "if-eq", dalvik_decomp_instr_if },
[DOP_IF_NE] = { 0x33, "if-ne", dalvik_decomp_instr_if },
[DOP_IF_LT] = { 0x34, "if-lt", dalvik_decomp_instr_if },
[DOP_IF_GE] = { 0x35, "if-ge", dalvik_decomp_instr_if },
[DOP_IF_GT] = { 0x36, "if-gt", dalvik_decomp_instr_if },
[DOP_IF_LE] = { 0x37, "if-le", dalvik_decomp_instr_if },
[DOP_IF_EQZ] = { 0x38, "if-eqz" },
[DOP_IF_NEZ] = { 0x39, "if-nez" },
[DOP_IF_LTZ] = { 0x3a, "if-ltz" },
[DOP_IF_GEZ] = { 0x3b, "if-gez" },
[DOP_IF_GTZ] = { 0x3c, "if-gtz" },
[DOP_IF_LEZ] = { 0x3d, "if-lez" },
[DOP_AGET] = { 0x44, "aget" },
[DOP_AGET_WIDE] = { 0x45, "aget-wide" },
[DOP_AGET_OBJECT] = { 0x46, "aget-object" },
[DOP_AGET_BOOLEAN] = { 0x47, "aget-boolean" },
[DOP_AGET_BYTE] = { 0x48, "aget-byte", dalvik_decomp_instr_aget },
[DOP_AGET_CHAR] = { 0x49, "aget-char" },
[DOP_AGET_SHORT] = { 0x4a, "aget-short" },
[DOP_APUT] = { 0x4b, "aput" },
[DOP_APUT_WIDE] = { 0x4c, "aput-wide" },
[DOP_APUT_OBJECT] = { 0x4d, "aput-object" },
[DOP_APUT_BOOLEAN] = { 0x4e, "aput-boolean" },
[DOP_APUT_BYTE] = { 0x4f, "aput-byte", dalvik_decomp_instr_aput },
[DOP_APUT_CHAR] = { 0x50, "aput-char" },
[DOP_APUT_SHORT] = { 0x51, "aput-short" },
[DOP_IGET] = { 0x52, "iget" },
[DOP_IGET_WIDE] = { 0x53, "iget-wide" },
[DOP_IGET_OBJECT] = { 0x54, "iget-object" },
[DOP_IGET_BOOLEAN] = { 0x55, "iget-boolean" },
[DOP_IGET_BYTE] = { 0x56, "iget-byte" },
[DOP_IGET_CHAR] = { 0x57, "iget-char" },
[DOP_IGET_SHORT] = { 0x58, "iget-short" },
[DOP_IPUT] = { 0x59, "iput" },
[DOP_IPUT_WIDE] = { 0x5a, "iput-wide" },
[DOP_IPUT_OBJECT] = { 0x5b, "iput-object" },
[DOP_IPUT_BOOLEAN] = { 0x5c, "iput-boolean" },
[DOP_IPUT_BYTE] = { 0x5d, "iput-byte" },
[DOP_IPUT_CHAR] = { 0x5e, "iput-char" },
[DOP_IPUT_SHORT] = { 0x5f, "iput-short" },
[DOP_SGET] = { 0x60, "sget" },
[DOP_SGET_WIDE] = { 0x61, "sget-wide" },
[DOP_SGET_OBJECT] = { 0x62, "sget-object" },
[DOP_SGET_BOOLEAN] = { 0x63, "sget-boolean" },
[DOP_SGET_BYTE] = { 0x64, "sget-byte" },
[DOP_SGET_CHAR] = { 0x65, "sget-char" },
[DOP_SGET_SHORT] = { 0x66, "sget-short" },
[DOP_SPUT] = { 0x67, "sput" },
[DOP_SPUT_WIDE] = { 0x68, "sput-wide" },
[DOP_SPUT_OBJECT] = { 0x69, "sput-object" },
[DOP_SPUT_BOOLEAN] = { 0x6a, "sput-boolean" },
[DOP_SPUT_BYTE] = { 0x6b, "sput-byte" },
[DOP_SPUT_CHAR] = { 0x6c, "sput-char" },
[DOP_SPUT_SHORT] = { 0x6d, "sput-short" },
[DOP_INVOKE_VIRTUAL] = { 0x6e, "invoke-virtual", dalvik_decomp_instr_invoke_virtual },
[DOP_INVOKE_SUPER] = { 0x6f, "invoke-static" },
[DOP_INVOKE_DIRECT] = { 0x70, "invoke-direct" },
[DOP_INVOKE_STATIC] = { 0x71, "invoke-static" },
[DOP_INVOKE_INTERFACE] = { 0x72, "invoke-interface" },
[DOP_TO_INT_LONG] = { 0x81, "int-to-long" },
[DOP_TO_INT_FLOAT] = { 0x82, "int-to-float" },
[DOP_TO_INT_DOUBLE] = { 0x83, "int-to-double" },
[DOP_TO_LONG_INT] = { 0x84, "long-to-int" },
[DOP_TO_LONG_FLOAT] = { 0x85, "long-to-float" },
[DOP_TO_LONG_DOUBLE] = { 0x86, "long-to-double" },
[DOP_TO_FLOAT_INT] = { 0x87, "float-to-int" },
[DOP_TO_FLOAT_LONG] = { 0x88, "float-to-long" },
[DOP_TO_FLOAT_DOUBLE] = { 0x89, "float-to-double" },
[DOP_TO_DOUBLE_INT] = { 0x8a, "double-to-int" },
[DOP_TO_DOUBLE_LONG] = { 0x8b, "double-to-long" },
[DOP_TO_DOUBLE_FLOAT] = { 0x8c, "double-to-float" },
[DOP_TO_INT_BYTE] = { 0x8d, "int-to-byte" },
[DOP_TO_INT_CHAR] = { 0x8e, "int-to-char" },
[DOP_TO_INT_SHORT] = { 0x8f, "int-to-short" },
[DOP_ADD_INT] = { 0x90, "add-int", dalvik_decomp_instr_arithm },
[DOP_SUB_INT] = { 0x91, "sub-int", dalvik_decomp_instr_arithm },
[DOP_MUL_INT] = { 0x92, "mul-int", dalvik_decomp_instr_arithm },
[DOP_DIV_INT] = { 0x93, "div-int", dalvik_decomp_instr_arithm },
[DOP_REM_INT] = { 0x94, "rem-int", dalvik_decomp_instr_arithm },
[DOP_AND_INT] = { 0x95, "and-int", dalvik_decomp_instr_arithm },
[DOP_OR_INT] = { 0x96, "or-int", dalvik_decomp_instr_arithm },
[DOP_XOR_INT] = { 0x97, "xor-int", dalvik_decomp_instr_arithm },
[DOP_ADD_INT_2ADDR] = { 0xb0, "add-int/2addr", dalvik_decomp_instr_arithm_2addr },
[DOP_MUL_INT_2ADDR] = { 0xb2, "mul-int/2addr", dalvik_decomp_instr_arithm_2addr },
[DOP_DIV_INT_2ADDR] = { 0xb3, "div-int/2addr", dalvik_decomp_instr_arithm_2addr },
[DOP_REM_INT_2ADDR] = { 0xb4, "rem-int/2addr", dalvik_decomp_instr_arithm_2addr },
[DOP_AND_INT_2ADDR] = { 0xb5, "and-int/2addr", dalvik_decomp_instr_arithm_2addr },
[DOP_OR_INT_2ADDR] = { 0xb6, "or-int/2addr", dalvik_decomp_instr_arithm_2addr },
[DOP_XOR_INT_2ADDR] = { 0xb7, "xor-int/2addr", dalvik_decomp_instr_arithm_2addr },
[DOP_MUL_DOUBLE_2ADDR] = { 0xcd, "mul-double/2addr", dalvik_decomp_instr_arithm_2addr },
[DOP_ADD_INT_LIT16] = { 0xd0, "add-int/lit16", dalvik_decomp_instr_arithm_lit },
[DOP_RSUB_INT] = { 0xd1, "rsub-int" },
[DOP_MUL_INT_LIT16] = { 0xd2, "mul-int/lit16", dalvik_decomp_instr_arithm_lit },
[DOP_DIV_INT_LIT16] = { 0xd3, "div-int/lit16", dalvik_decomp_instr_arithm_lit },
[DOP_REM_INT_LIT16] = { 0xd4, "rem-int/lit16", dalvik_decomp_instr_arithm_lit },
[DOP_AND_INT_LIT16] = { 0xd5, "and-int/lit16", dalvik_decomp_instr_arithm_lit },
[DOP_OR_INT_LIT16] = { 0xd6, "or-int/lit16", dalvik_decomp_instr_arithm_lit },
[DOP_XOR_INT_LIT16] = { 0xd7, "xor-int/lit16", dalvik_decomp_instr_arithm_lit },
[DOP_ADD_INT_LIT8] = { 0xd8, "add-int/lit8", dalvik_decomp_instr_arithm_lit },
[DOP_RSUB_INT_LIT8] = { 0xd9, "rsub-int/lit8" },
[DOP_MUL_INT_LIT8] = { 0xda, "mul-int/lit8", dalvik_decomp_instr_arithm_lit },
[DOP_DIV_INT_LIT8] = { 0xdb, "div-int/lit8", dalvik_decomp_instr_arithm_lit },
[DOP_REM_INT_LIT8] = { 0xdc, "rem-int/lit8", dalvik_decomp_instr_arithm_lit },
[DOP_AND_INT_LIT8] = { 0xdd, "and-int/lit8", dalvik_decomp_instr_arithm_lit },
[DOP_OR_INT_LIT8] = { 0xde, "or-int/lit8", dalvik_decomp_instr_arithm_lit },
[DOP_XOR_INT_LIT8] = { 0xdf, "xor-int/lit8", dalvik_decomp_instr_arithm_lit }
};
/* Traduit une instruction en version humainement lisible. */
static const char *dalvik_get_instruction_text(const GDalvikInstruction *, const GExeFormat *, AsmSyntax);
/* Informe sur une éventuelle référence à une autre instruction. */
static InstructionLinkType dalvik_get_instruction_link(const GDalvikInstruction *, vmpa_t *);
/* Indique si l'instruction correspond à un retour de fonction. */
static bool dalvik_instruction_is_return(const GDalvikInstruction *);
/* Décompile une instruction de la machine virtuelle Dalvik. */
GDecInstruction *dalvik_instruction_decompile(const GDalvikInstruction *, GDecContext *);
/* Indique le type défini pour une instruction d'architecture Dalvik. */
G_DEFINE_TYPE(GDalvikInstruction, g_dalvik_instruction, G_TYPE_ARCH_INSTRUCTION);
/******************************************************************************
* *
* Paramètres : klass = classe à initialiser. *
* *
* Description : Initialise la classe des instructions pour Dalvik. *
* *
* Retour : - *
* *
* Remarques : - *
* *
******************************************************************************/
static void g_dalvik_instruction_class_init(GDalvikInstructionClass *klass)
{
}
/******************************************************************************
* *
* Paramètres : instr = instance à initialiser. *
* *
* Description : Initialise une instance d'instruction d'architecture Dalvik. *
* *
* Retour : - *
* *
* Remarques : - *
* *
******************************************************************************/
static void g_dalvik_instruction_init(GDalvikInstruction *instr)
{
GArchInstruction *parent; /* Instance parente */
parent = G_ARCH_INSTRUCTION(instr);
parent->get_text = (get_instruction_text_fc)dalvik_get_instruction_text;
parent->get_link = (get_instruction_link_fc)dalvik_get_instruction_link;
parent->is_return = (is_instruction_return_fc)dalvik_instruction_is_return;
parent->decomp = (decomp_instr_fc)dalvik_instruction_decompile;
}
/******************************************************************************
* *
* Paramètres : type = type d'instruction à représenter. *
* *
* Description : Crée une instruction pour l'architecture Dalvik. *
* *
* Retour : Architecture mise en place. *
* *
* Remarques : - *
* *
******************************************************************************/
GArchInstruction *g_dalvik_instruction_new(DalvikOpcodes type)
{
GArchInstruction *result; /* Structure à retourner */
result = g_object_new(G_TYPE_DALVIK_INSTRUCTION, NULL);
G_DALVIK_INSTRUCTION(result)->type = type;
return result;
}
/******************************************************************************
* *
* Paramètres : instr = instruction Dalvik à consulter. *
* *
* Description : Indique l'opcode associé à une instruction Dalvik. *
* *
* Retour : Identifiant de l'instruction en place. *
* *
* Remarques : - *
* *
******************************************************************************/
DalvikOpcodes g_dalvik_instruction_get_opcode(const GDalvikInstruction *instr)
{
return instr->type;
}
/* ---------------------------------------------------------------------------------- */
/* AIDE A LA MISE EN PLACE D'INSTRUCTIONS */
/* ---------------------------------------------------------------------------------- */
/******************************************************************************
* *
* Paramètres : data = flux de données à analyser. *
* pos = position courante dans ce flux. *
* len = taille totale des données à analyser. *
* *
* Description : Recherche l'identifiant de la prochaine instruction. *
* *
* Retour : Identifiant de la prochaine instruction à tenter de charger. *
* *
* Remarques : - *
* *
******************************************************************************/
DalvikOpcodes dalvik_guess_next_instruction(const bin_t *data, off_t pos, off_t len)
{
DalvikOpcodes result; /* Identifiant à retourner */
bin_t opcode; /* Opcode à trouver */
opcode = data[pos];
for (result = 0; result < DOP_COUNT; result++)
{
if (_instructions[result].opcode == opcode)
break;
}
return result;
}
/******************************************************************************
* *
* Paramètres : instr = instruction à traiter. *
* format = format du binaire manipulé. *
* syntax = type de représentation demandée. *
* *
* Description : Traduit une instruction en version humainement lisible. *
* *
* Retour : Chaîne de caractères à libérer de la mémoire. *
* *
* Remarques : - *
* *
******************************************************************************/
static const char *dalvik_get_instruction_text(const GDalvikInstruction *instr, const GExeFormat *format, AsmSyntax syntax)
{
return _instructions[instr->type].keyword;
}
/******************************************************************************
* *
* Paramètres : instr = instruction à consulter. *
* addr = eventuelle adresse associée à faire connaître. [OUT] *
* *
* Description : Informe sur une éventuelle référence à une autre instruction.*
* *
* Retour : Type de lien trouvé ou ILT_NONE si aucun. *
* *
* Remarques : - *
* *
******************************************************************************/
static InstructionLinkType dalvik_get_instruction_link(const GDalvikInstruction *instr, vmpa_t *addr)
{
return ILT_NONE/*instr->get_link(instr, addr)*/;
}
/******************************************************************************
* *
* Paramètres : instr = instruction à consulter. *
* *
* Description : Indique si l'instruction correspond à un retour de fonction. *
* *
* Retour : true si l'instruction est un 'return' quelconque ou false. *
* *
* Remarques : - *
* *
******************************************************************************/
static bool dalvik_instruction_is_return(const GDalvikInstruction *instr)
{
return (instr->type == DOP_RETURN_VOID);
}
/******************************************************************************
* *
* Paramètres : instr = instruction d'origine à convertir. *
* ctx = contexte de la phase de décompilation. *
* *
* Description : Décompile une instruction de la machine virtuelle Dalvik. *
* *
* Retour : Instruction mise en place ou NULL. *
* *
* Remarques : - *
* *
******************************************************************************/
GDecInstruction *dalvik_instruction_decompile(const GDalvikInstruction *instr, GDecContext *ctx)
{
GDecInstruction *result; /* Instruction à retourner */
if (_instructions[instr->type].decomp != NULL)
result = _instructions[instr->type].decomp(G_ARCH_INSTRUCTION(instr), ctx);
else
result = NULL;
return result;
}
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