PSL_USER
regs->tf_rflags = PSL_USER | (regs->tf_rflags & PSL_T);
*(u_int64_t *)lp2->lwp_thread->td_sp = PSL_USER;
regs->tf_rflags = PSL_USER | (regs->tf_rflags & PSL_T);
*(u_int64_t *)lp2->lwp_thread->td_sp = PSL_USER;