dis_tgt_lookup
symbol = dis_tgt_lookup(tgt, addr, &symoffset, 1, &symsize,
symbol = dis_tgt_lookup(db->db_tgt, addr, &offset, 0, &size, NULL);
const char *dis_tgt_lookup(dis_tgt_t *, uint64_t, off_t *, int, size_t *,