SETREGS
if (P->flags & SETREGS) {
P->flags &= ~(SETSIG|SETFAULT|SETENTRY|SETEXIT|SETHOLD|SETREGS);
P->flags |= SETREGS; /* set registers before continuing */
if (L->lwp_flags & SETREGS) {
L->lwp_flags &= ~(SETHOLD|SETREGS);
L->lwp_flags |= SETREGS; /* set registers before continuing */
P->flags |= SETREGS; /* set registers before continuing */
P->flags |= SETREGS;