https://bugs.winehq.org/show_bug.cgi?id=42255
--- Comment #12 from Austin English austinenglish@gmail.com --- (In reply to Austin English from comment #11)
Well luckily Microsoft has finally documented it: https://docs.microsoft.com/en-us/windows/desktop/api/winnt/nf-winnt- rtladdgrowablefunctiontable
I took 5 minutes to try to add a stub, but seeing a weird compiler error; will try to look more later.
Dumbness solved. Returning STATUS_NOT_IMPLEMENTED fails. If I return STATUS_SUCCESS instead, it gets further, then needs ntdll.dll.RtlGrowFunctionTable.
Bedtime now though.