ResolveField() public method

public ResolveField ( int metadataToken ) : FieldInfo
metadataToken int
return FieldInfo
Esempio n. 1
0
    public OpToken(Code aOpCode, int aPos, int aNextPos, Int32 aValue, Module aModule, Type[] aTypeGenericArgs, Type[] aMethodGenericArgs, ExceptionHandlingClause aCurrentExceptionHandler)
      : base(aOpCode, aPos, aNextPos, aCurrentExceptionHandler) {
      Value = aValue;
      if (ValueIsField)
      {
          ValueField = aModule.ResolveField(Value, aTypeGenericArgs, aMethodGenericArgs);
      }
      if (ValueIsType)
      {
          ValueType = aModule.ResolveType(Value, aTypeGenericArgs, aMethodGenericArgs);
      }

    }
Esempio n. 2
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        public IFieldReference FindField(uint metadataToken, Type[] genericTypeArguments, Type[] genericMethodArguments)
        {
            IFieldDeclaration fieldReference;

            if (_tokenFieldMap.TryGetValue(metadataToken, out fieldReference))
            {
                return(fieldReference);
            }

            fieldReference = new FieldDeclaration(_netModule.ResolveField((int)metadataToken, genericTypeArguments, genericMethodArguments));

            _tokenFieldMap.Add(metadataToken, fieldReference);
            return(fieldReference);
        }
Esempio n. 3
0
        /// <summary>
        /// Constructs the array of ILInstructions according to the IL byte code.
        /// </summary>
        /// <param name="module"></param>
        private void ConstructInstructions(Module module)
        {
            byte[] il = this.il;
            int position = 0;
            instructions = new List<ILInstruction>();
            while (position < il.Length)
            {
                ILInstruction instruction = new ILInstruction();

                // get the operation code of the current instruction
                OpCode code = OpCodes.Nop;
                ushort value = il[position++];
                if (value != 0xfe)
                {
                    code = Globals.singleByteOpCodes[(int)value];
                }
                else
                {
                    value = il[position++];
                    code = Globals.multiByteOpCodes[(int)value];
                    value = (ushort)(value | 0xfe00);
                }
                instruction.Code = code;
                instruction.Offset = position - 1;
                int metadataToken = 0;
                // get the operand of the current operation
                switch (code.OperandType)
                {
                    case OperandType.InlineBrTarget:
                        metadataToken = ReadInt32(il, ref position);
                        metadataToken += position;
                        instruction.Operand = metadataToken;
                        break;

                    // patched from comments on CP -hwd
                    case OperandType.InlineField:
                        metadataToken = ReadInt32(il, ref position);
                        if (mi is ConstructorInfo)
                        {
                            instruction.Operand = module.ResolveField(metadataToken,
                                mi.DeclaringType.GetGenericArguments(), null);
                        }
                        else
                        {
                            instruction.Operand = module.ResolveField(metadataToken,
                                mi.DeclaringType.GetGenericArguments(), mi.GetGenericArguments());
                        }
                        break;

                    // patched from comments on CP -hwd
                    case OperandType.InlineMethod:
                        metadataToken = ReadInt32(il, ref position);
                        try
                        {
                            if (mi is ConstructorInfo)
                            {
                                instruction.Operand = module.ResolveMethod(metadataToken,
                                    mi.DeclaringType.GetGenericArguments(), null);
                            }
                            else
                            {
                                instruction.Operand = module.ResolveMethod(metadataToken,
                                    mi.DeclaringType.GetGenericArguments(), mi.GetGenericArguments());
                            }
                        }
                        catch
                        {
                            if (mi is ConstructorInfo)
                            {
                                instruction.Operand = module.ResolveMember(metadataToken,
                                    mi.DeclaringType.GetGenericArguments(), null);
                            }
                            else
                            {
                                instruction.Operand = module.ResolveMember(metadataToken,
                                    mi.DeclaringType.GetGenericArguments(), mi.GetGenericArguments());
                            }
                        }
                        break;

                    case OperandType.InlineSig:
                        metadataToken = ReadInt32(il, ref position);
                        instruction.Operand = module.ResolveSignature(metadataToken);
                        break;

                    // patched from comments on CP -hwd
                    case OperandType.InlineTok:
                        metadataToken = ReadInt32(il, ref position);
                        //try
                        //{
                            if (mi is ConstructorInfo)
                            {
                                instruction.Operand = module.ResolveType(metadataToken,
                                    mi.DeclaringType.GetGenericArguments(), null);
                            }
                            else
                            {
                                instruction.Operand = module.ResolveType(metadataToken,
                                    mi.DeclaringType.GetGenericArguments(), mi.GetGenericArguments());
                            }
                        //}
                        //catch
                        //{
                        //    int i = 1;

                        //}
                        break;

                    // patched from comments on CP -hwd
                    case OperandType.InlineType:
                        metadataToken = ReadInt32(il, ref position);
                        if (this.mi is MethodInfo)
                        {
                            instruction.Operand = module.ResolveType(metadataToken,
                            this.mi.DeclaringType.GetGenericArguments(), this.mi.GetGenericArguments());
                        }
                        else if (mi is ConstructorInfo)
                        {
                            instruction.Operand = module.ResolveType(metadataToken,
                               this.mi.DeclaringType.GetGenericArguments(), null);
                        }
                        else
                        {
                            instruction.Operand = module.ResolveType(metadataToken);
                        }
                        break;

                    case OperandType.InlineI:
                        {
                            instruction.Operand = ReadInt32(il, ref position);
                            break;
                        }
                    case OperandType.InlineI8:
                        {
                            instruction.Operand = ReadInt64(il, ref position);
                            break;
                        }
                    case OperandType.InlineNone:
                        {
                            instruction.Operand = null;
                            break;
                        }
                    case OperandType.InlineR:
                        {
                            instruction.Operand = ReadDouble(il, ref position);
                            break;
                        }
                    case OperandType.InlineString:
                        {
                            metadataToken = ReadInt32(il, ref position);
                            instruction.Operand = module.ResolveString(metadataToken);
                            break;
                        }
                    case OperandType.InlineSwitch:
                        {
                            int count = ReadInt32(il, ref position);
                            int[] casesAddresses = new int[count];
                            for (int i = 0; i < count; i++)
                            {
                                casesAddresses[i] = ReadInt32(il, ref position);
                            }
                            int[] cases = new int[count];
                            for (int i = 0; i < count; i++)
                            {
                                cases[i] = position + casesAddresses[i];
                            }
                            break;
                        }
                    case OperandType.InlineVar:
                        {
                            instruction.Operand = ReadUInt16(il, ref position);
                            break;
                        }
                    case OperandType.ShortInlineBrTarget:
                        {
                            instruction.Operand = ReadSByte(il, ref position) + position;
                            break;
                        }
                    case OperandType.ShortInlineI:
                        {
                            instruction.Operand = ReadSByte(il, ref position);
                            break;
                        }
                    case OperandType.ShortInlineR:
                        {
                            instruction.Operand = ReadSingle(il, ref position);
                            break;
                        }
                    case OperandType.ShortInlineVar:
                        {
                            instruction.Operand = ReadByte(il, ref position);
                            break;
                        }
                    default:
                        {
                            throw new Exception("Unknown operand type.");
                        }
                }
                instructions.Add(instruction);
            }
        }
        /// <summary>
        /// Constructs the array of ILInstructions according to the IL byte code.
        /// </summary>
        /// <param name="module"></param>
        private void ConstructInstructions(Module module)
        {
            byte[] il = this.il;
            int position = 0;
            instructions = new List<ILInstruction>();
            while (position < il.Length)
            {
                ILInstruction instruction = new ILInstruction();

                // get the operation code of the current instruction
                OpCode code = OpCodes.Nop;
                ushort value = il[position++];
                if (value != 0xfe)
                {
                    code = Globals.singleByteOpCodes[(int)value];
                }
                else
                {
                    value = il[position++];
                    code = Globals.multiByteOpCodes[(int)value];
                    value = (ushort)(value | 0xfe00);
                }
                instruction.Code = code;
                instruction.Offset = position - 1;
                int metadataToken = 0;
                // get the operand of the current operation
                switch (code.OperandType)
                {
                    case OperandType.InlineBrTarget:
                        metadataToken = ReadInt32(il, ref position);
                        metadataToken += position;
                        instruction.Operand = metadataToken;
                        break;
                    case OperandType.InlineField:
                        metadataToken = ReadInt32(il, ref position);
                        instruction.Operand = module.ResolveField(metadataToken);
                        break;
                    case OperandType.InlineMethod:
                        metadataToken = ReadInt32(il, ref position);
                        try
                        {
                            instruction.Operand = module.ResolveMethod(metadataToken);
                        }
                        catch
                        {
                            try
                            {
                                instruction.Operand = module.ResolveMember(metadataToken);
                            }
                            catch (Exception)
                            {
                                //Try generic method
                                try
                                {
                                    instruction.Operand = module.ResolveMethod(metadataToken, mi.DeclaringType.GetGenericArguments(), mi.GetGenericArguments());
                                }
                                catch (Exception)
                                {

                                    //Try generic member
                                    try
                                    {
                                        instruction.Operand = module.ResolveMember(metadataToken, mi.DeclaringType.GetGenericArguments(), mi.GetGenericArguments());
                                    }
                                    catch (Exception)
                                    {
                                        throw;
                                    }
                                }

                            }
                        }
                        break;
                    case OperandType.InlineSig:
                        metadataToken = ReadInt32(il, ref position);
                        instruction.Operand = module.ResolveSignature(metadataToken);
                        break;
                    case OperandType.InlineTok:
                        metadataToken = ReadInt32(il, ref position);
                        try
                        {
                            instruction.Operand = module.ResolveType(metadataToken);
                        }
                        catch
                        {

                        }
                        // SSS : see what to do here
                        break;
                     case OperandType.InlineType:
                        metadataToken = ReadInt32(il, ref position);
                        // now we call the ResolveType always using the generic attributes type in order
                        // to support decompilation of generic methods and classes

                        // thanks to the guys from code project who commented on this missing feature
                        try
                        {
                            instruction.Operand = module.ResolveType(metadataToken);
                        }
                        catch (Exception)
                        {
                            instruction.Operand = module.ResolveType(metadataToken, this.mi.DeclaringType.GetGenericArguments(), this.mi.GetGenericArguments());
                        }
                        break;
                    case OperandType.InlineI:
                        {
                            instruction.Operand = ReadInt32(il, ref position);
                            break;
                        }
                    case OperandType.InlineI8:
                        {
                            instruction.Operand = ReadInt64(il, ref position);
                            break;
                        }
                    case OperandType.InlineNone:
                        {
                            instruction.Operand = null;
                            break;
                        }
                    case OperandType.InlineR:
                        {
                            instruction.Operand = ReadDouble(il, ref position);
                            break;
                        }
                    case OperandType.InlineString:
                        {
                            metadataToken = ReadInt32(il, ref position);
                            instruction.Operand = module.ResolveString(metadataToken);
                            break;
                        }
                    case OperandType.InlineSwitch:
                        {
                            int count = ReadInt32(il, ref position);
                            int[] casesAddresses = new int[count];
                            for (int i = 0; i < count; i++)
                            {
                                casesAddresses[i] = ReadInt32(il, ref position);
                            }
                            int[] cases = new int[count];
                            for (int i = 0; i < count; i++)
                            {
                                cases[i] = position + casesAddresses[i];
                            }
                            break;
                        }
                    case OperandType.InlineVar:
                        {
                            instruction.Operand = ReadUInt16(il, ref position);
                            break;
                        }
                    case OperandType.ShortInlineBrTarget:
                        {
                            instruction.Operand = ReadSByte(il, ref position) + position;
                            break;
                        }
                    case OperandType.ShortInlineI:
                        {
                            instruction.Operand = ReadSByte(il, ref position);
                            break;
                        }
                    case OperandType.ShortInlineR:
                        {
                            instruction.Operand = ReadSingle(il, ref position);
                            break;
                        }
                    case OperandType.ShortInlineVar:
                        {
                            instruction.Operand = ReadByte(il, ref position);
                            break;
                        }
                    default:
                        {
                            throw new Exception("Unknown operand type.");
                        }
                }
                instructions.Add(instruction);
            }
        }
Esempio n. 5
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        void CopyOpcode(byte[] Bytes, ref int i, ILGenerator Gen, Module Origin, List<int> ExceptionTrinkets, Dictionary<int, Label[]> LabelOrigins)
        {
            OpCode Code = GetOpcode(Bytes, ref i);

            // These are emitted by exception handling copier if an exception
            // block is imminent. If not, copy them as usual.
            if(Code == OpCodes.Leave && ExceptionTrinkets.Contains(i + 5))
            {
                i += 4;
                return;
            }
            else if(Code == OpCodes.Leave_S && ExceptionTrinkets.Contains(i + 2))
            {
                // This is a rather tricky one. See the comment preceding the call to MineLabels above.
                i++;
                return;
            }
            else if(Code == OpCodes.Endfinally && ExceptionTrinkets.Contains(i+1)) return;

            switch(Code.OperandType)
            {
                // If no argument, then re-emit the opcode
                case OperandType.InlineNone:
                {
                    Gen.Emit(Code);
                    break;
                }

                // If argument is a method, re-emit the method reference
                case OperandType.InlineMethod:
                {
                    int Token = BitHelper.ReadInteger(Bytes, ref i);
                    MethodBase Base = Origin.ResolveMethod(Token);

                    if(Base is MethodInfo)
                        Gen.Emit(Code, GrabMethod(Base as MethodInfo));
                    else if(Base is ConstructorInfo)
                        Gen.Emit(Code, GrabConstructor(Base as ConstructorInfo));
                    else throw new InvalidOperationException("Inline method is neither method nor constructor.");

                    break;
                }

                // Argument is a field reference
                case OperandType.InlineField:
                {
                    int Token = BitHelper.ReadInteger(Bytes, ref i);
                    FieldInfo Field = Origin.ResolveField(Token);
                    Gen.Emit(Code, GrabField(Field));
                    break;
                }

                // Argument is a type reference
                case OperandType.InlineType:
                {
                    int Token = BitHelper.ReadInteger(Bytes, ref i);
                    Type Ref = Origin.ResolveType(Token);
                    Gen.Emit(Code, GrabType(Ref));
                    break;
                }

                // Argument is an inline string
                case OperandType.InlineString:
                {
                    int Token = BitHelper.ReadInteger(Bytes, ref i);
                    string Copy = Origin.ResolveString(Token);
                    Gen.Emit(Code, Copy);
                    break;
                }

                // Argument is a metadata token
                case OperandType.InlineTok:
                {
                    int Token = BitHelper.ReadInteger(Bytes, ref i);
                    MemberInfo Info = Origin.ResolveMember(Token);

                    if(Info.MemberType == MemberTypes.Field)
                    {
                        if(Code != OpCodes.Ldtoken || !TryReplaceBackingField(Bytes, i, Gen, Origin))
                            Gen.Emit(Code, GrabField(Info as FieldInfo));
                    }
                    else if(Info.MemberType == MemberTypes.Method)
                        Gen.Emit(Code, GrabMethod(Info as MethodInfo));
                    else if(Info.MemberType == MemberTypes.TypeInfo || Info.MemberType == MemberTypes.NestedType)
                        Gen.Emit(Code, GrabType(Info as Type));
                    else throw new InvalidOperationException("Inline token is neither field, nor method, nor type");

                    break;
                }

                // Argument is a switch map
                case OperandType.InlineSwitch:
                {
                    if(!LabelOrigins.ContainsKey(i))
                        throw new Exception("No switchmap found for RVA "+i.ToString("X"));

                    Label[] Labels = LabelOrigins[i];
                    i += 4 + Labels.Length*4;
                    Gen.Emit(Code, Labels);

                    break;
                }

                // Argument is a single-byte branch target
                case OperandType.ShortInlineBrTarget:
                {
                    if(!LabelOrigins.ContainsKey(i))
                        throw new Exception("No label origin found for RVA "+i.ToString("X"));

                    Gen.Emit(Code, LabelOrigins[i][0]);
                    i++;

                    break;
                }

                // Argument is a byte
                case OperandType.ShortInlineI:
                case OperandType.ShortInlineVar:
                {
                    Gen.Emit(Code, Bytes[++i]);
                    break;
                }

                // Argument is a short
                case OperandType.InlineVar:
                {
                    Gen.Emit(Code, BitHelper.ReadShort(Bytes, ref i));
                    break;
                }

                case OperandType.InlineBrTarget:
                {
                    if(!LabelOrigins.ContainsKey(i))
                        throw new Exception("No label origin found for RVA "+i.ToString("X"));

                    Gen.Emit(Code, LabelOrigins[i][0]);
                    i += 4;

                    break;
                }

                // Argument is a 32-bit integer
                case OperandType.InlineI:
                case OperandType.ShortInlineR: // This is actually a 32-bit float, but we don't care
                {
                    Gen.Emit(Code, BitHelper.ReadInteger(Bytes, ref i));
                    break;
                }

                // Argument is a 64-bit integer
                case OperandType.InlineI8:
                {
                    Gen.Emit(Code, BitHelper.ReadLong(Bytes, ref i));
                    break;
                }

                // Argument is a 64-bit float
                case OperandType.InlineR:
                {
                    Gen.Emit(Code, BitHelper.ReadDouble(Bytes, ref i));
                    break;
                }

                // If ever we run across OpCodes.Calli this'll probably happen
                default:
                    throw new InvalidOperationException("The method copier ran across an unknown opcode.");
            }
        }
Esempio n. 6
0
        bool TryReplaceBackingField(byte[] Bytes, int i, ILGenerator Gen, Module Origin)
        {
            // With a bit of clairvoyance we try to determine if we're dealing with
            // a specific type of array initializer that the C#-compiler uses.
            if(Bytes[i+1] != (byte) OpCodes.Call.Value)
                return false;

            if(Bytes[i+6] != (byte) OpCodes.Stsfld.Value)
                return false;

            i += 6;
            int Token = BitHelper.ReadInteger(Bytes, ref i);
            FieldInfo Info = Origin.ResolveField(Token);

            FieldInfo Ours = GrabField(Info);
            Gen.Emit(OpCodes.Ldtoken, BackingFields[Ours]);

            return true;
        }
        private void Write(BinaryWriter bw, Module module, MethodBody mb)
        {
            var locals = mb.LocalVariables;
            bw.Write(locals.Count);
            for (int i=0;i< locals.Count;i++)
            {
                bw.Write(locals[i].LocalType.FullName);
                bw.Write(locals[i].IsPinned);
            }

            var il = mb.GetILAsByteArray();
            for(int i = 0; i < il.Length;)
            {
                EArgumentType argType = EArgumentType.None;
                var opcode = (EOpCode)il[i];
                bw.Write(il[i]);
                i++;

                if(opcode == EOpCode.Extended)
                {
                    bw.Write(il[i]);
                    argType = ((EExtendedOpCode)il[i]).ArgFor();
                    i++;
                }
                else
                    argType = opcode.ArgFor();

                switch (argType)
                {
                    case EArgumentType.Field:
                        var fi = module.ResolveField(BitConverter.ToInt32(il, i));
                        i += 4;
                        bw.Write(Names.Field(fi));
                        break;
                    case EArgumentType.Float32:
                        bw.Write(BitConverter.ToSingle(il, i));
                        i += 4;
                        break;
                    case EArgumentType.Float64:
                        bw.Write(BitConverter.ToDouble(il, i));
                        i += 8;
                        break;
                    case EArgumentType.Token:
                    case EArgumentType.Int32:
                        bw.Write(BitConverter.ToInt32(il, i));
                        i += 4;
                        break;
                    case EArgumentType.Int64:
                        bw.Write(BitConverter.ToInt64(il, i));
                        i += 8;
                        break;
                    case EArgumentType.Int8:
                        bw.Write((sbyte)il[i]);
                        i++;
                        break;
                    case EArgumentType.ListOfInt:
                        uint count = BitConverter.ToUInt32(il, i);
                        bw.Write(count);
                        i += 4;
                        while(count > 0)
                        {
                            bw.Write(BitConverter.ToInt32(il, i));
                            i += 4;
                        }
                        break;
                    case EArgumentType.Method:
                        var mi = module.ResolveMethod(BitConverter.ToInt32(il, i));
                        i += 4;
                        bw.Write(Names.Method(mi));
                        break;
                    case EArgumentType.String:
                        var str = module.ResolveString(BitConverter.ToInt32(il, i));
                        i += 4;
                        bw.Write(str);
                        break;
                    case EArgumentType.Type:
                        var t = module.ResolveType(BitConverter.ToInt32(il, i));
                        i += 4;
                        bw.Write(t.FullName);
                        break;
                    case EArgumentType.Uint16:
                        bw.Write(BitConverter.ToUInt16(il, i));
                        i += 2;
                        break;
                    case EArgumentType.Uint32:
                        bw.Write(BitConverter.ToUInt32(il, i));
                        i += 4;
                        break;
                    case EArgumentType.Uint8:
                        bw.Write(il[i]);
                        i++;
                        break;
                }
            }

            bw.Write((byte)EOpCode.Terminator);
            /*

            var handlers = mb.ExceptionHandlingClauses;
            m_bw.Write(handlers.Count);
            foreach(var h in handlers)
            {
                m_bw.Write(h.TryOffset);
                m_bw.Write(h.TryLength);
                m_bw.Write(h.FilterOffset);
                m_bw.Write(h.HandlerOffset);
                m_bw.Write(h.HandlerLength);
                m_bw.Write((uint)h.Flags);

                //m_bw.Write(h.)
            }*/
        }
Esempio n. 8
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        private static int _ReadOperand(MethodBase This, OpCode code, int position, byte[] il, Module module, ILInstruction instruction)
        {
            int metadataToken;

            switch (code.OperandType)
            {
            case OperandType.InlineBrTarget: {
                metadataToken       = ReadInt32(il, ref position);
                metadataToken      += position;
                instruction.Operand = metadataToken;
                break;
            }

            case OperandType.InlineField: {
                metadataToken       = ReadInt32(il, ref position);
                instruction.Operand = module.ResolveField(metadataToken);
                break;
            }

            case OperandType.InlineMethod: {
                metadataToken = ReadInt32(il, ref position);
                try {
                    instruction.Operand = module.ResolveMethod(metadataToken);
                } catch {
                    instruction.Operand = module.ResolveMember(metadataToken);
                }
                break;
            }

            case OperandType.InlineSig: {
                metadataToken       = ReadInt32(il, ref position);
                instruction.Operand = module.ResolveSignature(metadataToken);
                break;
            }

            case OperandType.InlineTok: {
                metadataToken = ReadInt32(il, ref position);
                try {
                    instruction.Operand = module.ResolveType(metadataToken);
                } catch { }
                // SSS : see what to do here
                break;
            }

            case OperandType.InlineType: {
                metadataToken = ReadInt32(il, ref position);
                // now we call the ResolveType always using the generic attributes type in order
                // to support decompilation of generic methods and classes

                // thanks to the guys from code project who commented on this missing feature

                instruction.Operand = module.ResolveType(metadataToken, This.DeclaringType.GetGenericArguments(), This.GetGenericArguments());
                break;
            }

            case OperandType.InlineI: {
                instruction.Operand = ReadInt32(il, ref position);
                break;
            }

            case OperandType.InlineI8: {
                instruction.Operand = ReadInt64(il, ref position);
                break;
            }

            case OperandType.InlineNone: {
                instruction.Operand = null;
                break;
            }

            case OperandType.InlineR: {
                instruction.Operand = ReadDouble(il, ref position);
                break;
            }

            case OperandType.InlineString: {
                metadataToken       = ReadInt32(il, ref position);
                instruction.Operand = module.ResolveString(metadataToken);
                break;
            }

            case OperandType.InlineSwitch: {
                var count          = ReadInt32(il, ref position);
                var casesAddresses = new int[count];
                for (var i = 0; i < count; i++)
                {
                    casesAddresses[i] = ReadInt32(il, ref position);
                }

                var cases = new int[count];
                for (var i = 0; i < count; i++)
                {
                    cases[i] = position + casesAddresses[i];
                }

                break;
            }

            case OperandType.InlineVar: {
                instruction.Operand = ReadUInt16(il, ref position);
                break;
            }

            case OperandType.ShortInlineBrTarget: {
                instruction.Operand = ReadSByte(il, ref position) + position;
                break;
            }

            case OperandType.ShortInlineI: {
                if (instruction.Code == OpCodes.Ldc_I4_S)
                {
                    instruction.Operand = ReadSByte(il, ref position);
                }
                else
                {
                    instruction.Operand = ReadByte(il, ref position);
                }
                break;
            }

            case OperandType.ShortInlineR: {
                instruction.Operand = ReadSingle(il, ref position);
                break;
            }

            case OperandType.ShortInlineVar: {
                instruction.Operand = ReadByte(il, ref position);
                break;
            }

            default: {
                throw new Exception("Unknown operand type.");
            }
            }
            return(position);
        }
Esempio n. 9
0
        private void ConstructInstructions(Module module)
        {
            byte[] localIlbytes = this.il;
            int position = 0;
            while (position < localIlbytes.Length)
            {
                var instruction = new ILInstruction();

                // get the operation code of the current instruction
                OpCode code;
                ushort value = localIlbytes[position++];
                if (GlobalIntermediateLanguageConstants.SingleByteOpCodes.Count == 0)
                {
                    throw new InvalidOperationException(
                        "Attempt to use Method Body Reader before Global Intermediate Language Constants has been initialised. Global Intermediate Language Constants. Load Op Codes must be called once.");
                }

                if (value != 0xfe)
                {
                    code = GlobalIntermediateLanguageConstants.SingleByteOpCodes[value];
                }
                else
                {
                    value = localIlbytes[position++];
                    code = GlobalIntermediateLanguageConstants.MultiByteOpCodes[value];
                }

                instruction.Code = code;
                instruction.Offset = position - 1;
                int metadataToken;

                // get the operand of the current operation
                switch (code.OperandType)
                {
                    case OperandType.InlineBrTarget:
                        metadataToken = ReadInt32(ref position);
                        metadataToken += position;
                        instruction.Operand = metadataToken;
                        break;
                    case OperandType.InlineField:

                        // TODO All these try catch blocks need to go
                        try
                        {
                            metadataToken = ReadInt32(ref position);
                            instruction.Operand = module.ResolveField(metadataToken);
                        }
                        catch
                        {
                            instruction.Operand = new object();
                        }

                        break;
                    case OperandType.InlineMethod:
                        metadataToken = ReadInt32(ref position);
                        try
                        {
                            instruction.Operand = module.ResolveMethod(metadataToken);
                        }
                        catch
                        {
                            instruction.Operand = new object();
                        }

                        break;
                    case OperandType.InlineSig:
                        metadataToken = ReadInt32(ref position);
                        instruction.Operand = module.ResolveSignature(metadataToken);
                        break;
                    case OperandType.InlineTok:
                        metadataToken = ReadInt32(ref position);
                        try
                        {
                            instruction.Operand = module.ResolveType(metadataToken);
                        }
                        catch
                        {
                        }

                        // TODO : see what to do here
                        break;
                    case OperandType.InlineType:
                        metadataToken = ReadInt32(ref position);

                        // now we call the ResolveType always using the generic attributes type in order
                        // to support decompilation of generic methods and classes
                        // thanks to the guys from code project who commented on this missing feature
                        Type[] declaringTypeGenericArgs = this.mi.DeclaringType.GetGenericArguments();
                        Type[] genericArgs = null;
                        if (this.mi.IsGenericMethod)
                        {
                            genericArgs = this.mi.GetGenericArguments();
                        }

                        instruction.Operand = module.ResolveType(metadataToken, declaringTypeGenericArgs, genericArgs);
                        break;
                    case OperandType.InlineI:
                        {
                            instruction.Operand = ReadInt32(ref position);
                            break;
                        }

                    case OperandType.InlineI8:
                        {
                            instruction.Operand = ReadInt64(ref position);
                            break;
                        }

                    case OperandType.InlineNone:
                        {
                            instruction.Operand = null;
                            break;
                        }

                    case OperandType.InlineR:
                        {
                            instruction.Operand = ReadDouble(ref position);
                            break;
                        }

                    case OperandType.InlineString:
                        {
                            metadataToken = ReadInt32(ref position);
                            instruction.Operand = module.ResolveString(metadataToken);
                            break;
                        }

                    case OperandType.InlineSwitch:
                        {
                            int count = ReadInt32(ref position);
                            var casesAddresses = new int[count];
                            for (int i = 0; i < count; i++)
                            {
                                casesAddresses[i] = ReadInt32(ref position);
                            }

                            var cases = new int[count];
                            for (int i = 0; i < count; i++)
                            {
                                cases[i] = position + casesAddresses[i];
                            }

                            break;
                        }

                    case OperandType.InlineVar:
                        {
                            instruction.Operand = ReadUInt16(ref position);
                            break;
                        }

                    case OperandType.ShortInlineBrTarget:
                        {
                            instruction.Operand = ReadSByte(ref position) + position;
                            break;
                        }

                    case OperandType.ShortInlineI:
                        {
                            instruction.Operand = ReadSByte(ref position);
                            break;
                        }

                    case OperandType.ShortInlineR:
                        {
                            instruction.Operand = ReadSingle(ref position);
                            break;
                        }

                    case OperandType.ShortInlineVar:
                        {
                            instruction.Operand = ReadByte(ref position);
                            break;
                        }

                    default:
                        {
                            throw new NotSupportedException("Unknown operand type.");
                        }
                }

                this.instructions.Add(instruction);
            }
        }
Esempio n. 10
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 public string ToString( Module module )
 {
     OpCode opCode = OpCode;
     string operandStr = "";
     int operandStart = _startIndex + opCode.Size;
     switch (opCode.OperandType)
     {
         case OperandType.InlineBrTarget:
             break;
         case OperandType.InlineField:
             operandStr = module.ResolveField(_il.GetInt32(operandStart)).Name;
             break;
         case OperandType.InlineI:
             operandStr = _il.GetInt32(operandStart).ToString();
             break;
         case OperandType.InlineI8:
             operandStr = _il.GetInt64(operandStart).ToString();
             break;
         case OperandType.InlineMethod:
             operandStr = module.ResolveMethod(_il.GetInt32(operandStart)).Name;
             break;
         case OperandType.InlineNone:
             break;
         case OperandType.InlineR:
             operandStr = _il.GetDouble(operandStart).ToString();
             break;
         case OperandType.InlineSig:
             operandStr = string.Join("",
                                      module.ResolveSignature(_il.GetInt32(operandStart))
                                            .Select(b => b.ToString("X2")));
             break;
         case OperandType.InlineString:
             operandStr = "\"" + module.ResolveString(_il.GetInt32(operandStart)) + "\"";
             break;
         case OperandType.InlineSwitch:
             break;
         case OperandType.InlineTok:
             operandStr = module.ResolveType(_il.GetInt32(operandStart)).Name;
             break;
         case OperandType.InlineType:
             operandStr = module.ResolveType(_il.GetInt32(operandStart)).Name;
             break;
         case OperandType.InlineVar:
             operandStr = _il.GetInt16(operandStart).ToString();
             break;
         case OperandType.ShortInlineBrTarget:
             break;
         case OperandType.ShortInlineI:
             operandStr = ((int) _il[operandStart]).ToString();
             break;
         case OperandType.ShortInlineR:
             operandStr = _il.GetSingle(operandStart).ToString();
             break;
         case OperandType.ShortInlineVar:
             operandStr = ((int) _il[operandStart]).ToString();
             break;
     }
     return opCode.Name + " " + operandStr;
 }
Esempio n. 11
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 public override System.Reflection.FieldInfo ResolveField(int Metadatatoken)
 {
     return(_Module.ResolveField(Metadatatoken));
 }