59 lines
2.3 KiB
C#
59 lines
2.3 KiB
C#
/*
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Copyright (c) 2019-2020 Carter Bush - https://github.com/carterbush
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Copyright (c) 2020-2021 Katy Coe - http://www.djkaty.com - https://github.com/djkaty
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Copyright 2020 Robert Xiao - https://robertxiao.ca
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All rights reserved.
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*/
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using Il2CppInspector.Next;
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namespace Il2CppInspector
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{
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public enum MetadataUsageType
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{
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TypeInfo = 1,
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Type = 2,
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MethodDef = 3,
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FieldInfo = 4,
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StringLiteral = 5,
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MethodRef = 6,
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FieldRva = 7
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}
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public record struct MetadataUsage
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{
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public MetadataUsageType Type { get; }
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public int SourceIndex { get; }
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public ulong VirtualAddress { get; }
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public readonly bool IsValid => Type != 0;
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public MetadataUsage(MetadataUsageType type, int sourceIndex, ulong virtualAddress = 0) {
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Type = type;
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SourceIndex = sourceIndex;
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VirtualAddress = virtualAddress;
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}
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public static MetadataUsage FromEncodedIndex(Il2CppInspector package, uint encodedIndex, ulong virtualAddress = 0) {
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uint index;
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MetadataUsageType usageType;
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if (package.Version < MetadataVersions.V190) {
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/* These encoded indices appear only in vtables, and are decoded by IsGenericMethodIndex/GetDecodedMethodIndex */
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var isGeneric = encodedIndex & 0x80000000;
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index = package.Binary.VTableMethodReferences[(int)(encodedIndex & 0x7FFFFFFF)];
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usageType = (isGeneric != 0) ? MetadataUsageType.MethodRef : MetadataUsageType.MethodDef;
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} else {
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/* These encoded indices appear in metadata usages, and are decoded by GetEncodedIndexType/GetDecodedMethodIndex */
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var encodedType = encodedIndex & 0xE0000000;
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usageType = (MetadataUsageType)(encodedType >> 29);
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index = encodedIndex & 0x1FFFFFFF;
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// From v27 the bottom bit is set to indicate the usage token hasn't been replaced with a pointer at runtime yet
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if (package.Version >= MetadataVersions.V270)
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index >>= 1;
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}
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return new MetadataUsage(usageType, (int)index, virtualAddress);
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}
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}
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} |