extract_as_sword
i = extract_as_sword(state, &layout->pr_errpriv);
i = extract_as_sword(state, &layout->pr_bind);
sname = extract_as_sword(state, sname_fdesc);
i = extract_as_sword(state, &layout->pr_bindpset);
v_si_signo = extract_as_sword(state, &layout->f_si_signo);
v_si_code = extract_as_sword(state, &layout->f_si_code);