IopOpenSystemVariableDevice

NTSTATUS __stdcall IopOpenSystemVariableDevice(
        PFILE_OBJECT *FileObject,
        PDEVICE_OBJECT *DeviceObject,
        VOID ***FunctionTable){
  int DeviceObjectPointer; 
  VOID **v7; 
  int v8; 
  WCHAR *v9; 
  NTSTATUS v10; 
  _UNICODE_STRING DestinationString[2]; 
  WCHAR *SourceString; 

  DestinationString[0] = 0i64;
  if( (*(&stru_140C452E0 + 608) & 1) != 0 )
  {
    RtlInitUnicodeString(DestinationString, L"\\Device\\WindowsTrustedRT\\{699AA2F1-A42E-40DF-BABE-3AAAD2BB6A47}");
    DeviceObjectPointer = IoGetDeviceObjectPointer(DestinationString, 0x10000000ui64, FileObject, DeviceObject);
    if( DeviceObjectPointer >= 0 )
    {
LABEL_3:
      v7 = (VOID **)&IopSysEnvFunctionTableTrEE;
LABEL_13:
      *FunctionTable = v7;
      return DeviceObjectPointer;
    }
    goto LABEL_8;
  }
  SourceString = 0i64;
  IopGetDeviceInterfaces(&GUID_EFI_VARIABLE_SERVICE, 0i64, 0i64, 0, &SourceString, 0i64);
  if( v8 < 0 || (v9 = SourceString, !*SourceString) )
  {
LABEL_8:
    RtlInitUnicodeString(DestinationString, L"\\Device\\SysEnv");
    v10 = IoGetDeviceObjectPointer(DestinationString, 0x10000000ui64, FileObject, DeviceObject);
    DeviceObjectPointer = v10;
    if( v10 >= 0 )
    {
      v7 = &IopSysEnvFunctionTableSysEnv;
      goto LABEL_13;
    }
    if( (unsigned int)(v10 + 1073741773) <= 1 || v10 == -1073741766 )
    {
      *FileObject = 0i64;
      v7 = &IopSysEnvFunctionTableHal;
      *DeviceObject = 0i64;
      DeviceObjectPointer = 0;
      goto LABEL_13;
    }
    return DeviceObjectPointer;
  }
  RtlInitUnicodeString(DestinationString, SourceString);
  DeviceObjectPointer = IoGetDeviceObjectPointer(DestinationString, 0x10000000ui64, FileObject, DeviceObject);
  ExFreePoolWithTag(v9, 0);
  if( DeviceObjectPointer >= 0 )
    goto LABEL_3;
  return DeviceObjectPointer;
}

Referenced by: