OBJECT_HEADER_TO_PROCESS_INFO

INT64 __fastcall OBJECT_HEADER_TO_PROCESS_INFO(INT64 a1){
  if( (*(_BYTE *)(a1 + 26) & 0x10) != 0 )
    return a1 - *((unsigned __int8 *)ObpInfoMaskToOffset + (*(_BYTE *)(a1 + 26) & 0x1F));
  else
    return 0i64;
}

Referenced by:

ObGetObjectInformation
ObpIncrementHandleCountEx