_nsc_trydoorcall_ext
nss_status_t _nsc_trydoorcall_ext(void **dptr, size_t *bsize, size_t *dsize);
status = _nsc_trydoorcall_ext(&doorptr, &bufsize, &datasize);
status = _nsc_trydoorcall_ext(&doorptr, &bufsize, &datasize);
status = _nsc_trydoorcall_ext(&doorptr, &bufsize, &datasize);
(void) _nsc_trydoorcall_ext(&doorptr, &bufsize, &datasize);