1 /* $NetBSD: userret.h,v 1.15 2017/05/22 17:12:11 ragge Exp $ */
2
3 /*
4 * Copyright (c) 1994 Ludd, University of Lule}, Sweden.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #include <sys/userret.h>
29 #include <sys/ras.h>
30
31 /*
32 * Common code used by various exception handlers to
33 * return to usermode.
34 */
35 static __inline void
userret(struct lwp * l,struct trapframe * tf,u_quad_t oticks)36 userret(struct lwp *l, struct trapframe *tf, u_quad_t oticks)
37 {
38 struct proc * const p = l->l_proc;
39
40 mi_userret(l);
41
42 /*
43 * Check to see if a RAS was interrupted and restart it if it was.
44 */
45 if (__predict_false(p->p_raslist != NULL)) {
46 void * const ras_pc = ras_lookup(p, (void *) tf->tf_pc);
47 if (ras_pc != (void *) -1)
48 tf->tf_pc = (vaddr_t) ras_pc;
49 }
50
51 /*
52 * If profiling, charge system time to the trapped pc.
53 */
54 if ((p->p_stflag & PST_PROFIL) != 0) {
55 extern int psratio;
56
57 addupc_task(l, tf->tf_pc,
58 (int)(p->p_sticks - oticks) * psratio);
59 }
60 }
61