1 /* $NetBSD: userret.h,v 1.14 2012/05/25 12:32:48 matt 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 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed at Ludd, University of Lule}. 18 * 4. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/userret.h> 34 #include <sys/ras.h> 35 36 /* 37 * Common code used by various exception handlers to 38 * return to usermode. 39 */ 40 static __inline void 41 userret(struct lwp *l, struct trapframe *tf, u_quad_t oticks) 42 { 43 struct proc * const p = l->l_proc; 44 45 mi_userret(l); 46 47 /* 48 * Check to see if a RAS was interrupted and restart it if it was. 49 */ 50 if (__predict_false(p->p_raslist != NULL)) { 51 void * const ras_pc = ras_lookup(p, (void *) tf->tf_pc); 52 if (ras_pc != (void *) -1) 53 tf->tf_pc = (vaddr_t) ras_pc; 54 } 55 56 /* 57 * If profiling, charge system time to the trapped pc. 58 */ 59 if ((p->p_stflag & PST_PROFIL) != 0) { 60 extern int psratio; 61 62 addupc_task(l, tf->tf_pc, 63 (int)(p->p_sticks - oticks) * psratio); 64 } 65 } 66