59 lines
2.2 KiB
C#
59 lines
2.2 KiB
C#
/*
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Copyright 2017 Katy Coe - http://www.hearthcode.org - http://www.djkaty.com
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All rights reserved.
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*/
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using System.Linq;
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namespace Il2CppInspector
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{
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internal class Il2CppReaderX86 : Il2CppReader
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{
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public Il2CppReaderX86(IFileFormatReader stream) : base(stream) { }
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public Il2CppReaderX86(IFileFormatReader stream, uint codeRegistration, uint metadataRegistration) : base(stream, codeRegistration, metadataRegistration) { }
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protected override (uint, uint) Search(uint loc, uint globalOffset) {
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uint funcPtr, metadata, code;
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// Variant 1
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// Assembly bytes to search for at start of each function
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var bytes = new byte[] { 0x6A, 0x00, 0x6A, 0x00, 0x68 };
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Image.Position = loc;
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var buff = Image.ReadBytes(5);
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if (bytes.SequenceEqual(buff)) {
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// Next 4 bytes are the function pointer being pushed onto the stack
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funcPtr = Image.ReadUInt32();
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// Start of next instruction
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if (Image.ReadByte() != 0xB9)
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return (0, 0);
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// Jump to Il2CppCodegenRegistration
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Image.Position = Image.MapVATR(funcPtr) + 6;
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metadata = Image.ReadUInt32();
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Image.Position = Image.MapVATR(funcPtr) + 11;
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code = Image.ReadUInt32();
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return (code, metadata);
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}
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// Variant 2
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bytes = new byte[] { 0x55, 0x89, 0xE5, 0x53, 0x83, 0xE4, 0xF0, 0x83, 0xEC, 0x20, 0xE8, 0x00, 0x00, 0x00, 0x00, 0x5B };
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Image.Position = loc;
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buff = Image.ReadBytes(16);
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if (!bytes.SequenceEqual(buff))
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return (0, 0);
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Image.Position += 8;
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funcPtr = Image.MapVATR(Image.ReadUInt32() + globalOffset);
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if (funcPtr > Image.Stream.BaseStream.Length)
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return (0, 0);
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Image.Position = funcPtr + 0x22;
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metadata = Image.ReadUInt32() + globalOffset;
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Image.Position = funcPtr + 0x2C;
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code = Image.ReadUInt32() + globalOffset;
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return (code, metadata);
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}
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}
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}
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