_MAP_NEW
arg &= ~(_MAP_NEW|MAP_TYPE);
_MAP_NEW | MAP_PRIVATE | MAP_ANON | MAP_ALIGN, -1L, (off_t)0) != 0)
adp->arg_value = (long)(_MAP_NEW|flags);
if ((flags & ~(MAP_SHARED | MAP_PRIVATE | MAP_FIXED | _MAP_NEW |
if ((flags & _MAP_NEW) == 0)
flags &= ~_MAP_NEW;