vax/include/userret.h

1.4.2.3  matt /*	$NetBSD: userret.h,v 1.4.2.3 2007/04/04 06:49:06 matt Exp $	*/
1.4.2.2  yamt
1.4.2.2  yamt /*
1.4.2.2  yamt  * Copyright (c) 1994 Ludd, University of Lule}, Sweden.
1.4.2.2  yamt  * All rights reserved.
1.4.2.2  yamt  *
1.4.2.2  yamt  * Redistribution and use in source and binary forms, with or without
1.4.2.2  yamt  * modification, are permitted provided that the following conditions
1.4.2.2  yamt  * are met:
1.4.2.2  yamt  * 1. Redistributions of source code must retain the above copyright
1.4.2.2  yamt  *    notice, this list of conditions and the following disclaimer.
1.4.2.2  yamt  * 2. Redistributions in binary form must reproduce the above copyright
1.4.2.2  yamt  *    notice, this list of conditions and the following disclaimer in the
1.4.2.2  yamt  *    documentation and/or other materials provided with the distribution.
1.4.2.2  yamt  * 3. All advertising materials mentioning features or use of this software
1.4.2.2  yamt  *    must display the following acknowledgement:
1.4.2.2  yamt  *     This product includes software developed at Ludd, University of Lule}.
1.4.2.2  yamt  * 4. The name of the author may not be used to endorse or promote products
1.4.2.2  yamt  *    derived from this software without specific prior written permission
1.4.2.2  yamt  *
1.4.2.2  yamt  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
1.4.2.2  yamt  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
1.4.2.2  yamt  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
1.4.2.2  yamt  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
1.4.2.2  yamt  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
1.4.2.2  yamt  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
1.4.2.2  yamt  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
1.4.2.2  yamt  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
1.4.2.2  yamt  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
1.4.2.2  yamt  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.4.2.2  yamt  */
1.4.2.2  yamt
1.4.2.2  yamt #include <sys/userret.h>
1.4.2.2  yamt
1.4.2.2  yamt /*
1.4.2.2  yamt  *	Common code used by various execption handlers to
1.4.2.2  yamt  *	return to usermode.
1.4.2.2  yamt  */
1.4.2.2  yamt static __inline void
1.4.2.2  yamt userret(struct lwp *l, struct trapframe *frame, u_quad_t oticks)
1.4.2.2  yamt {
1.4.2.2  yamt 	struct proc *p = l->l_proc;
1.4.2.2  yamt
1.4.2.2  yamt 	LOCKDEBUG_BARRIER(NULL, 0);
1.4.2.2  yamt
1.4.2.2  yamt 	/* Take pending signals. */
1.4.2.2  yamt 	for (;;) {
1.4.2.2  yamt 		if ((l->l_flag & LW_USERRET) != 0)
1.4.2.2  yamt 			lwp_userret(l);
1.4.2.3  matt 		if (!curcpu()->ci_need_resched)
1.4.2.2  yamt 			break;
1.4.2.2  yamt 		preempt();
1.4.2.2  yamt 	}
1.4.2.2  yamt
1.4.2.2  yamt 	l->l_priority = l->l_usrpri;
1.4.2.2  yamt 	l->l_cpu->ci_schedstate.spc_curpriority = l->l_priority;
1.4.2.2  yamt
1.4.2.2  yamt 	/*
1.4.2.2  yamt 	 * If profiling, charge system time to the trapped pc.
1.4.2.2  yamt 	 */
1.4.2.2  yamt 	if ((p->p_stflag & PST_PROFIL) != 0) {
1.4.2.2  yamt 		extern int psratio;
1.4.2.2  yamt
1.4.2.2  yamt 		addupc_task(l, frame->pc,
1.4.2.2  yamt 		    (int)(p->p_sticks - oticks) * psratio);
1.4.2.2  yamt 	}
1.4.2.2  yamt }