sigdiffset
sigdiffset(&p->p_sig, &stopdefault);
sigdiffset(&p->p_extsig, &stopdefault);
sigdiffset(&tx->t_sig, &stopdefault);
sigdiffset(&tx->t_extsig, &stopdefault);
sigdiffset(&smask, &cantmask);
sigdiffset(&t->t_hold, &t->t_sigwait);
sigdiffset(&curthread->t_hold, &cantmask);
sigdiffset(&temp, &t->t_hold);
sigdiffset(&temp, &holdvfork);
sigdiffset(&p->p_siginfo, &cantmask);
sigdiffset(&p->p_sig, &ignoredefault);
sigdiffset(&p->p_extsig, &ignoredefault);
sigdiffset(&t->t_sig, &ignoredefault);
sigdiffset(&t->t_extsig, &ignoredefault);
sigdiffset(&lmask, smask);
sigdiffset(&curthread->t_hold, &lmask);
sigdiffset(&p->p_sig, &stopdefault);
sigdiffset(&p->p_extsig, &stopdefault);
sigdiffset(&tt->t_sig, &stopdefault);
sigdiffset(&tt->t_extsig, &stopdefault);
sigdiffset(&set, &t->t_hold);
sigdiffset(&set, &holdvfork);
sigdiffset(&curthread->t_hold, &cantmask);
extern void sigdiffset(k_sigset_t *, const k_sigset_t *);
sigdiffset(&t->t_hold, &t->t_sigwait);