1 /* $NetBSD: kvm_vax.c,v 1.2 1995/04/25 15:41:11 ragge Exp $ */ 2 /*- 3 * Copyright (c) 1992, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * This code is derived from software developed by the Computer Systems 7 * Engineering group at Lawrence Berkeley Laboratory under DARPA contract 8 * BG 91-66 and contributed to Berkeley. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 */ 38 39 /* 40 * VAX machine dependent routines for kvm. Hopefully, the forthcoming 41 * vm code will one day obsolete this module. Furthermore, I hope it 42 * gets here soon, because this basically is an error stub! (sorry) 43 * This code may not work anyway. 44 */ 45 46 #include <sys/param.h> 47 #include <sys/user.h> 48 #include <sys/proc.h> 49 #include <sys/stat.h> 50 #include <unistd.h> 51 #include <nlist.h> 52 #include <kvm.h> 53 54 #include <vm/vm.h> 55 #include <vm/vm_param.h> 56 57 #include <limits.h> 58 #include <db.h> 59 60 #include "kvm_private.h" 61 62 struct vmstate { 63 u_long end; 64 }; 65 66 void 67 _kvm_freevtop(kd) 68 kvm_t *kd; 69 { 70 if (kd->vmst != 0) 71 free(kd->vmst); 72 } 73 74 int 75 _kvm_initvtop(kd) 76 kvm_t *kd; 77 { 78 register int i; 79 register int off; 80 register struct vmstate *vm; 81 struct stat st; 82 struct nlist nlist[2]; 83 84 vm = (struct vmstate *)_kvm_malloc(kd, sizeof(*vm)); 85 if (vm == 0) 86 return (-1); 87 88 kd->vmst = vm; 89 90 if (fstat(kd->pmfd, &st) < 0) 91 return (-1); 92 93 /* Get end of kernel address */ 94 nlist[0].n_name = "_end"; 95 nlist[1].n_name = 0; 96 if (kvm_nlist(kd, nlist) != 0) { 97 _kvm_err(kd, kd->program, "pmap_stod: no such symbol"); 98 return (-1); 99 } 100 vm->end = (u_long)nlist[0].n_value; 101 102 return (0); 103 } 104 105 #define VA_OFF(va) (va & (NBPG - 1)) 106 107 /* 108 * Translate a kernel virtual address to a physical address using the 109 * mapping information in kd->vm. Returns the result in pa, and returns 110 * the number of bytes that are contiguously available from this 111 * physical address. This routine is used only for crashdumps. 112 */ 113 int 114 _kvm_kvatop(kd, va, pa) 115 kvm_t *kd; 116 u_long va; 117 u_long *pa; 118 { 119 register int end; 120 121 if (va < KERNBASE) { 122 _kvm_err(kd, 0, "invalid address (%x<%x)", va, KERNBASE); 123 return (0); 124 } 125 126 end = kd->vmst->end; 127 if (va >= end) { 128 _kvm_err(kd, 0, "invalid address (%x>=%x)", va, end); 129 return (0); 130 } 131 132 *pa = (va - KERNBASE); 133 return (end - va); 134 } 135