DebugService2

VOID __stdcall DebugService2(){
  __asm { int     2Dh; Windows NT - debugging services: eax = type }
  __debugbreak();
}

Referenced by:

DbgCommandString
DbgLoadImageSymbols
DbgLoadUserImageSymbols
DbgUnLoadImageSymbols
DbgUnLoadImageSymbolsUnicode
KiBugcheckUnloadDebugSymbols