PS_T
flags = PS_IE | PS_T;
rp->r_ps &= ~PS_T; /* turn off trace */
rp->r_ps &= ~PS_T;
rp->r_ps |= PS_T;
rp->r_ps &= ~PS_T;
if (rp->r_ps & PS_T) {
rp->r_ps &= ~PS_T;
rp->r_ps |= PS_T;
rp->r_ps &= ~PS_T;
#define PSL_USERMASK (PS_ICC|PS_D|PS_T|PS_V|PS_P|PS_ACHK|PS_NT)
if ((rp->r_ps & PS_T) || (lwp->lwp_pcb.pcb_flags & REQUEST_STEP)) {
rp->r_ps &= ~PS_T;
if (lwptoregs(lwp)->r_ps & PS_T)
if ((rp->r_ps & PS_T) || (lwp->lwp_pcb.pcb_flags & REQUEST_STEP)) {
rp->r_ps &= ~PS_T;