/* $NetBSD: userret.h,v 1.9 2009/10/17 08:50:49 nakayama Exp $ */ /* * Copyright (c) 1996-2002 Eduardo Horvath. All rights reserved. * Copyright (c) 1996 * The President and Fellows of Harvard College. All rights reserved. * Copyright (c) 1992, 1993 * The Regents of the University of California. All rights reserved. * * This software was developed by the Computer Systems Engineering group * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and * contributed to Berkeley. * * All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Lawrence Berkeley Laboratory. * This product includes software developed by Harvard University. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * This product includes software developed by Harvard University. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)trap.c 8.4 (Berkeley) 9/23/93 */ #include static __inline void userret(struct lwp *, int, u_quad_t); /* * Define the code needed before returning to user mode, for * trap, mem_access_fault, and syscall. */ static __inline void userret(struct lwp *l, int pc, u_quad_t oticks) { struct proc *p = l->l_proc; mi_userret(l); /* * If profiling, charge recent system time to the trapped pc. */ if (p->p_stflag & PST_PROFIL) addupc_task(l, pc, (int)(p->p_sticks - oticks)); } static __inline void share_fpu(struct lwp *, struct trapframe64 *); /* * If someone stole the FPU while we were away, do not enable it * on return. This is not done in userret() above as it must follow * the ktrsysret() in syscall(). Actually, it is likely that the * ktrsysret should occur before the call to userret. * * Oh, and don't touch the FPU bit if we're returning to the kernel. */ static __inline void share_fpu(struct lwp *l, struct trapframe64 *tf) { if (!(tf->tf_tstate & TSTATE_PRIV) && fplwp != l) tf->tf_tstate &= ~TSTATE_PEF; }