SANITY
SANITY((tf->tf_ipsw & ci->ci_psw) == ci->ci_psw);
SANITY((ci->ci_psw & PSW_I) == 0 || tf->tf_eiem != 0);
SANITY(!USERMODE(tf->tf_iioq_head));
SANITY(!USERMODE(tf->tf_iioq_tail));
SANITY(tf->tf_iioq_head >= (u_int) &kernel_text);
SANITY(tf->tf_iioq_head < (u_int) &etext);
SANITY(tf->tf_iioq_tail >= (u_int) &kernel_text);
SANITY(tf->tf_iioq_tail < (u_int) &etext);
SANITY(tf->tf_sp >= minsp && tf->tf_sp < maxsp);
SANITY(USERMODE(tf->tf_iioq_head));
SANITY(USERMODE(tf->tf_iioq_tail));
SANITY(tf->tf_cr30 == (u_int)pcb->pcb_fpregs);
SANITY(bdp->dhcp_packet.op == BOOTREPLY, "bogus DHCP packet");