67 lines
2.4 KiB
C#
67 lines
2.4 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.DotNet;
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using dnlib.DotNet.Emit;
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namespace de4dot.code.deobfuscators.Agile_NET.vm.v2 {
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class CsvmToCilMethodConverter : CsvmToCilMethodConverterBase {
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VmOpCodeHandlerDetector opCodeDetector;
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public CsvmToCilMethodConverter(IDeobfuscatorContext deobfuscatorContext, ModuleDefMD module, VmOpCodeHandlerDetector opCodeDetector)
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: base(deobfuscatorContext, module) {
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this.opCodeDetector = opCodeDetector;
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}
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protected override List<Instruction> ReadInstructions(MethodDef cilMethod, CsvmMethodData csvmMethod) {
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var reader = new BinaryReader(new MemoryStream(csvmMethod.Instructions));
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var instrs = new List<Instruction>();
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var gpContext = GenericParamContext.Create(cilMethod);
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var handlerInfoReader = new OpCodeHandlerInfoReader(module, gpContext);
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int numVmInstrs = reader.ReadInt32();
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var vmInstrs = new ushort[numVmInstrs];
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for (int i = 0; i < numVmInstrs; i++)
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vmInstrs[i] = reader.ReadUInt16();
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uint offset = 0;
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for (int vmInstrIndex = 0; vmInstrIndex < numVmInstrs; vmInstrIndex++) {
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var composite = opCodeDetector.Handlers[vmInstrs[vmInstrIndex]];
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IList<HandlerTypeCode> handlerInfos = composite.HandlerTypeCodes;
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if (handlerInfos.Count == 0)
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handlerInfos = new HandlerTypeCode[] { HandlerTypeCode.Nop };
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for (int hi = 0; hi < handlerInfos.Count; hi++) {
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var instr = handlerInfoReader.Read(handlerInfos[hi], reader);
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instr.Offset = offset;
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offset += (uint)GetInstructionSize(instr);
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SetCilToVmIndex(instr, vmInstrIndex);
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if (hi == 0)
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SetVmIndexToCil(instr, vmInstrIndex);
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instrs.Add(instr);
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}
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}
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return instrs;
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}
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}
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}
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