thr_pread_long
ret = thr_pread_long(ta, pt + ta->thread_off_tid, &lwp);
ret = thr_pread_long(ta, pt + ta->thread_off_tid, &lwp);
ret = thr_pread_long(ta, pt + ta->thread_off_tid, &lwp);
ret = thr_pread_long(ta, pt + ta->thread_off_tid, &lwp);
int thr_pread_long(const struct td_thragent *, psaddr_t, uint64_t *);