_UC_STACK
(ucp)->uc_flags = _UC_CPU | _UC_STACK; \
sc->sc_ucp.uc_flags = _UC_STACK | _UC_CPU | _UC_SIGMASK;
lwp0pcb.pcb_ucp.uc_flags = _UC_STACK | _UC_CPU | _UC_SIGMASK;
jump_ucp.uc_flags = _UC_STACK | _UC_CPU | _UC_SIGMASK;
uc->uc_flags = (_UC_SIGMASK | _UC_CPU | _UC_STACK | _UC_CLRSTACK);
uctx.uc_flags = (_UC_SIGMASK|_UC_CPU|_UC_STACK|_UC_CLRSTACK);
uc.uc_flags |= _UC_STACK;
ucp->uc_flags |= _UC_STACK;
if ((ucp->uc_flags & _UC_STACK) != 0) {
ucp->uc_flags |= _UC_STACK;
if ((ucp->uc_flags & _UC_STACK) != 0) {