rwindow.c revision 82906
1/*- 2 * Copyright (c) 1997 Berkeley Software Design, Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 3. Berkeley Software Design Inc's name may not be used to endorse or 13 * promote products derived from this software without specific prior 14 * written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY BERKELEY SOFTWARE DESIGN INC ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL BERKELEY SOFTWARE DESIGN INC BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * from: BSDI: trap.c,v 1.17.2.9 1999/10/19 15:29:52 cp Exp 29 * $FreeBSD: head/sys/sparc64/sparc64/rwindow.c 82906 2001-09-03 23:10:45Z jake $ 30 */ 31 32#include <sys/param.h> 33#include <sys/systm.h> 34#include <sys/ktr.h> 35#include <sys/proc.h> 36#include <sys/user.h> 37 38#include <machine/frame.h> 39 40int 41rwindow_load(struct proc *p, struct trapframe *tf, int n) 42{ 43 struct rwindow rw; 44 u_long usp; 45 int error; 46 int i; 47 48 /* 49 * In case current window is still only on-chip, push it out; 50 * if it cannot get all the way out, we cannot continue either. 51 */ 52 if ((error = rwindow_save(p)) != 0) 53 return (error); 54 usp = tf->tf_out[6]; 55 CTR3(KTR_TRAP, "rwindow_load: p=%p (%s) n=%d", 56 p, p->p_comm, n); 57 for (i = 0; i < n; i++) { 58 CTR1(KTR_TRAP, "rwindow_load: usp=%#lx", usp); 59 usp += SPOFF; 60 error = copyin((void *)usp, &rw, sizeof rw); 61 usp = rw.rw_in[6]; 62 } 63 CTR1(KTR_TRAP, "rwindow_load: error=%d", error); 64 return (error); 65} 66 67int 68rwindow_save(struct proc *p) 69{ 70 struct rwindow *rw; 71 struct pcb *pcb; 72 u_long *ausp; 73 u_long usp; 74 int error; 75 int i; 76 77 flushw(); 78 pcb = &p->p_addr->u_pcb; 79 i = pcb->pcb_nsaved; 80 CTR3(KTR_TRAP, "rwindow_save: p=%p (%s) nsaved=%d", p, p->p_comm, i); 81 if (i == 0) 82 return (0); 83 ausp = pcb->pcb_rwsp; 84 rw = pcb->pcb_rw; 85 error = 0; 86 do { 87 usp = *ausp; 88 CTR1(KTR_TRAP, "rwindow_save: usp=%#lx", usp); 89 usp += SPOFF; 90 error = copyout(rw, (void *)usp, sizeof *rw); 91 if (error) 92 break; 93 ausp++; 94 rw++; 95 } while (--i > 0); 96 CTR1(KTR_TRAP, "rwindow_save: error=%d", error); 97 if (error == 0) 98 pcb->pcb_nsaved = 0; 99 return (error); 100} 101