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IL2CPP: Only reconstruct registration data when necessary

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This commit is contained in:
Katy Coe
2020-12-08 16:56:46 +01:00
parent 3556697939
commit ec5d6606f3
1 changed files with 13 additions and 11 deletions
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8
Il2CppInspector.Common/IL2CPP/Il2CppBinary.cs
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@@ -228,9 +228,6 @@ namespace Il2CppInspector
CodeRegistration = Image.ReadMappedObject<Il2CppCodeRegistration>(codeRegistration);
MetadataRegistration = Image.ReadMappedObject<Il2CppMetadataRegistration>(metadataRegistration);
// Restore the field order in CodeRegistration and MetadataRegistration if they have been re-ordered for obfuscation
ReconstructMetadata(metadata);
// Do basic validatation that MetadataRegistration and CodeRegistration are sane
/*
* TODO: Validation can be greatly expanded upon later, eg. pointers in these two structs should actually be pointers
@@ -239,6 +236,7 @@ namespace Il2CppInspector
* typeRefPointers must be a series of pointers in __const
* MethodInvokePointers must be a series of pointers in __text or .text, and in sequential order
*/
for (var pass = 0; pass <= 1; pass++)
if (MetadataRegistration.typesCount < MetadataRegistration.typeDefinitionsSizesCount
|| MetadataRegistration.genericClassesCount < MetadataRegistration.genericInstsCount
|| MetadataRegistration.genericMethodTableCount < MetadataRegistration.genericInstsCount
@@ -246,6 +244,10 @@ namespace Il2CppInspector
|| CodeRegistration.unresolvedVirtualCallCount > 0x4000 // >= 22
|| CodeRegistration.interopDataCount > 0x1000 // >= 23
|| (Image.Version <= 24.1 && CodeRegistration.invokerPointersCount > CodeRegistration.methodPointersCount))
// Restore the field order in CodeRegistration and MetadataRegistration if they have been re-ordered for obfuscation
if (pass == 0)
ReconstructMetadata(metadata);
else
throw new NotSupportedException("The detected Il2CppCodeRegistration / Il2CppMetadataRegistration structs do not pass validation. This may mean that their fields have been re-ordered as a form of obfuscation and Il2CppInspector has not been able to restore the original order automatically. Consider re-ordering the fields in Il2CppBinaryClasses.cs and try again.");
// The global method pointer list was deprecated in v24.2 in favour of Il2CppCodeGenModule