userret.h revision 1.2.2.3
1 1.2.2.3 nathanw /* $NetBSD: userret.h,v 1.2.2.3 2002/08/06 22:59:39 nathanw Exp $ */ 2 1.2.2.2 nathanw 3 1.2.2.2 nathanw /* 4 1.2.2.2 nathanw * Copyright (C) 1995, 1996 Wolfgang Solfrank. 5 1.2.2.2 nathanw * Copyright (C) 1995, 1996 TooLs GmbH. 6 1.2.2.2 nathanw * All rights reserved. 7 1.2.2.2 nathanw * 8 1.2.2.2 nathanw * Redistribution and use in source and binary forms, with or without 9 1.2.2.2 nathanw * modification, are permitted provided that the following conditions 10 1.2.2.2 nathanw * are met: 11 1.2.2.2 nathanw * 1. Redistributions of source code must retain the above copyright 12 1.2.2.2 nathanw * notice, this list of conditions and the following disclaimer. 13 1.2.2.2 nathanw * 2. Redistributions in binary form must reproduce the above copyright 14 1.2.2.2 nathanw * notice, this list of conditions and the following disclaimer in the 15 1.2.2.2 nathanw * documentation and/or other materials provided with the distribution. 16 1.2.2.2 nathanw * 3. All advertising materials mentioning features or use of this software 17 1.2.2.2 nathanw * must display the following acknowledgement: 18 1.2.2.2 nathanw * This product includes software developed by TooLs GmbH. 19 1.2.2.2 nathanw * 4. The name of TooLs GmbH may not be used to endorse or promote products 20 1.2.2.2 nathanw * derived from this software without specific prior written permission. 21 1.2.2.2 nathanw * 22 1.2.2.2 nathanw * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 23 1.2.2.2 nathanw * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 1.2.2.2 nathanw * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 1.2.2.2 nathanw * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 1.2.2.2 nathanw * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 27 1.2.2.2 nathanw * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 28 1.2.2.2 nathanw * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 29 1.2.2.2 nathanw * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 30 1.2.2.2 nathanw * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 31 1.2.2.2 nathanw * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 1.2.2.2 nathanw */ 33 1.2.2.2 nathanw 34 1.2.2.2 nathanw /* 35 1.2.2.2 nathanw * Define the code needed before returning to user mode, for 36 1.2.2.2 nathanw * trap and syscall. 37 1.2.2.2 nathanw */ 38 1.2.2.2 nathanw static __inline void 39 1.2.2.2 nathanw userret(struct lwp *l, struct trapframe *frame) 40 1.2.2.2 nathanw { 41 1.2.2.2 nathanw struct cpu_info *ci = curcpu(); 42 1.2.2.2 nathanw struct pcb *pcb; 43 1.2.2.2 nathanw int sig; 44 1.2.2.2 nathanw 45 1.2.2.2 nathanw /* Take pending signals. */ 46 1.2.2.2 nathanw while ((sig = CURSIG(l)) != 0) { 47 1.2.2.2 nathanw postsig(sig); 48 1.2.2.2 nathanw } 49 1.2.2.2 nathanw 50 1.2.2.2 nathanw /* Invoke per-process kernel-exit handling, if any */ 51 1.2.2.2 nathanw if (l->l_proc->p_userret) 52 1.2.2.2 nathanw (l->l_proc->p_userret)(l, l->l_proc->p_userret_arg); 53 1.2.2.2 nathanw 54 1.2.2.2 nathanw /* Invoke any pending upcalls */ 55 1.2.2.2 nathanw if (l->l_flag & L_SA_UPCALL) 56 1.2.2.2 nathanw sa_upcall_userret(l); 57 1.2.2.2 nathanw 58 1.2.2.2 nathanw pcb = &l->l_addr->u_pcb; 59 1.2.2.2 nathanw 60 1.2.2.2 nathanw /* 61 1.2.2.2 nathanw * If someone stole the fp or vector unit while we were away, 62 1.2.2.2 nathanw * disable it 63 1.2.2.2 nathanw */ 64 1.2.2.2 nathanw #ifdef PPC_HAS_FPU 65 1.2.2.2 nathanw if ((pcb->pcb_flags & PCB_FPU) && 66 1.2.2.2 nathanw (l != ci->ci_fpulwp || pcb->pcb_fpcpu != ci)) { 67 1.2.2.2 nathanw frame->srr1 &= ~PSL_FP; 68 1.2.2.2 nathanw } 69 1.2.2.2 nathanw #endif 70 1.2.2.2 nathanw #ifdef ALTIVEC 71 1.2.2.2 nathanw if ((pcb->pcb_flags & PCB_ALTIVEC) && 72 1.2.2.2 nathanw (l != ci->ci_veclwp || pcb->pcb_veccpu != ci)) { 73 1.2.2.2 nathanw frame->srr1 &= ~PSL_VEC; 74 1.2.2.2 nathanw } 75 1.2.2.2 nathanw 76 1.2.2.2 nathanw /* 77 1.2.2.2 nathanw * If the new process isn't the current AltiVec process on this 78 1.2.2.2 nathanw * cpu, we need to stop any data streams that are active (since 79 1.2.2.2 nathanw * it will be a different address space). 80 1.2.2.2 nathanw */ 81 1.2.2.2 nathanw if (ci->ci_vecproc != NULL && ci->ci_vecproc != l) { 82 1.2.2.2 nathanw __asm __volatile("dssall;sync"); 83 1.2.2.2 nathanw } 84 1.2.2.2 nathanw #endif 85 1.2.2.2 nathanw 86 1.2.2.3 nathanw ci->ci_schedstate.spc_curpriority = l->l_priority = l->l_usrpri; 87 1.2.2.2 nathanw } 88
Indexes created Thu Oct 23 22:10:10 GMT 2025