103 lines
3.4 KiB
C#
103 lines
3.4 KiB
C#
/*
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Copyright (C) 2011-2015 de4dot@gmail.com
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This file is part of de4dot.
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de4dot is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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de4dot is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with de4dot. If not, see <http://www.gnu.org/licenses/>.
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*/
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using System;
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using System.Collections.Generic;
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using System.IO;
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using dnlib.IO;
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using dnlib.DotNet;
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using dnlib.DotNet.Emit;
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namespace de4dot.code.deobfuscators.Babel_NET {
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class MethodBodyReader : MethodBodyReaderBase {
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ImageReader imageReader;
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public int Flags2 { get; set; }
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public ushort MaxStack { get; set; }
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public MethodBodyReader(ImageReader imageReader, IBinaryReader reader)
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: base(reader) {
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this.imageReader = imageReader;
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}
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public void Read(IList<Parameter> parameters) {
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this.parameters = parameters;
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Flags2 = reader.ReadInt16();
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MaxStack = reader.ReadUInt16();
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SetLocals(imageReader.ReadTypeSigs());
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ReadInstructions(imageReader.ReadVariableLengthInt32());
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ReadExceptionHandlers(imageReader.ReadVariableLengthInt32());
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}
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protected override IField ReadInlineField(Instruction instr) {
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return imageReader.ReadFieldRef();
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}
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protected override IMethod ReadInlineMethod(Instruction instr) {
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return imageReader.ReadMethodRef();
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}
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protected override MethodSig ReadInlineSig(Instruction instr) {
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return imageReader.ReadCallSite();
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}
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protected override string ReadInlineString(Instruction instr) {
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return imageReader.ReadString();
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}
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protected override ITokenOperand ReadInlineTok(Instruction instr) {
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switch (reader.ReadByte()) {
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case 0: return imageReader.ReadTypeSig().ToTypeDefOrRef();
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case 1: return imageReader.ReadFieldRef();
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case 2: return imageReader.ReadMethodRef();
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default: throw new ApplicationException("Unknown token type");
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}
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}
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protected override ITypeDefOrRef ReadInlineType(Instruction instr) {
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return imageReader.ReadTypeSig().ToTypeDefOrRef();
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}
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void ReadExceptionHandlers(int numExceptionHandlers) {
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exceptionHandlers = new List<ExceptionHandler>(numExceptionHandlers);
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for (int i = 0; i < numExceptionHandlers; i++)
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Add(ReadExceptionHandler());
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}
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ExceptionHandler ReadExceptionHandler() {
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var ehType = (ExceptionHandlerType)reader.ReadByte();
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uint tryOffset = imageReader.ReadVariableLengthUInt32();
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uint tryLength = imageReader.ReadVariableLengthUInt32();
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uint handlerOffset = imageReader.ReadVariableLengthUInt32();
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uint handlerLength = imageReader.ReadVariableLengthUInt32();
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var catchType = imageReader.ReadTypeSig().ToTypeDefOrRef();
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uint filterOffset = imageReader.ReadVariableLengthUInt32();
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var eh = new ExceptionHandler(ehType);
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eh.TryStart = GetInstructionThrow(tryOffset);
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eh.TryEnd = GetInstruction(tryOffset + tryLength);
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if (ehType == ExceptionHandlerType.Filter)
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eh.FilterStart = GetInstructionThrow(filterOffset);
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eh.HandlerStart = GetInstructionThrow(handlerOffset);
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eh.HandlerEnd = GetInstruction(handlerOffset + handlerLength);
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eh.CatchType = catchType;
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return eh;
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}
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}
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}
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