60 lines
1.7 KiB
C#
60 lines
1.7 KiB
C#
/*
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Copyright (C) 2011-2014 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 dnlib.DotNet.Emit;
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using de4dot.blocks;
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using de4dot.blocks.cflow;
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namespace de4dot.code.deobfuscators.dotNET_Reactor.v4 {
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class DnrMethodCallInliner : MethodCallInliner {
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public DnrMethodCallInliner()
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: base(false) {
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}
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protected override Instruction GetFirstInstruction(IList<Instruction> instrs, ref int index) {
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var instr = GetFirstInstruction(instrs, index);
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if (instr != null)
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index = instrs.IndexOf(instr);
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return DotNetUtils.GetInstruction(instrs, ref index);
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}
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Instruction GetFirstInstruction(IList<Instruction> instrs, int index) {
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try {
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var instr = instrs[index];
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if (!instr.IsBr())
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return null;
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instr = instr.Operand as Instruction;
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if (instr == null)
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return null;
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if (!instr.IsLdcI4() || instr.GetLdcI4Value() != 0)
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return null;
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instr = instrs[instrs.IndexOf(instr) + 1];
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if (!instr.IsBrtrue())
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return null;
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return instrs[instrs.IndexOf(instr) + 1];
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}
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catch {
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return null;
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}
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}
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}
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}
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