internal static (long FlagRva, long TokenRva) FindMetadataInitForMethod(MethodRewriteContext method, long gameAssemblyBase)
{
if (MetadataInitForMethodRva == 0)
{
FindMetadataInitForMethod(method.DeclaringType.AssemblyContext.GlobalContext, gameAssemblyBase);
}
var codeStart = (IntPtr)(gameAssemblyBase + method.FileOffset);
var firstCall = XrefScannerLowLevel.JumpTargets(codeStart).FirstOrDefault();
if (firstCall != MetadataInitForMethodFileOffset || firstCall == IntPtr.Zero)
{
return(0, 0);
}
var tokenPointer = XrefScanUtilFinder.FindLastRcxReadAddressBeforeCallTo(codeStart, MetadataInitForMethodFileOffset);
var initFlagPointer = XrefScanUtilFinder.FindByteWriteTargetRightAfterCallTo(codeStart, MetadataInitForMethodFileOffset);
if (tokenPointer == IntPtr.Zero || initFlagPointer == IntPtr.Zero)
{
return(0, 0);
}
return((long)initFlagPointer - gameAssemblyBase - method.FileOffset + method.Rva, (long)tokenPointer - gameAssemblyBase - method.FileOffset + method.Rva);
}
internal static unsafe bool CallMetadataInitForMethod(MethodBase method)
{
if (ourMetadataInitForMethodPointer == IntPtr.Zero)
{
FindMetadataInitForMethod();
}
var nativeMethodInfoObject = UnhollowerUtils.GetIl2CppMethodInfoPointerFieldForGeneratedMethod(method)?.GetValue(null);
if (nativeMethodInfoObject == null)
{
return(false);
}
var nativeMethodInfo = (IntPtr)nativeMethodInfoObject;
var codeStart = *(IntPtr *)nativeMethodInfo;
var firstCall = XrefScannerLowLevel.JumpTargets(codeStart).FirstOrDefault();
if (firstCall != ourMetadataInitForMethodPointer || firstCall == IntPtr.Zero)
{
return(false);
}
var tokenPointer = XrefScanUtilFinder.FindLastRcxReadAddressBeforeCallTo(codeStart, ourMetadataInitForMethodPointer);
var initFlagPointer = XrefScanUtilFinder.FindByteWriteTargetRightAfterCallTo(codeStart, ourMetadataInitForMethodPointer);
if (tokenPointer == IntPtr.Zero || initFlagPointer == IntPtr.Zero)
{
return(false);
}
if (Marshal.ReadByte(initFlagPointer) == 0)
{
ourMetadataInitForMethodDelegate(Marshal.ReadInt32(tokenPointer));
Marshal.WriteByte(initFlagPointer, 1);
}
return(true);
}