do_sys_mknodat
return do_sys_mknodat(l, SCARG(uap, fd), SCARG(uap, path),
return do_sys_mknodat(l, fdat, pathname, mode, dev,
return do_sys_mknodat(l, AT_FDCWD, pathname, mode, dev, seg);
int do_sys_mknodat(struct lwp *, int, const char *, mode_t, dev_t, enum uio_seg);