1 /* $NetBSD: kvm_vax.c,v 1.3 1996/03/18 22:34:06 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software developed by the Computer Systems 8 * Engineering group at Lawrence Berkeley Laboratory under DARPA contract 9 * BG 91-66 and contributed to Berkeley. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the University of 22 * California, Berkeley and its contributors. 23 * 4. Neither the name of the University nor the names of its contributors 24 * may be used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 */ 39 40 /* 41 * VAX machine dependent routines for kvm. Hopefully, the forthcoming 42 * vm code will one day obsolete this module. Furthermore, I hope it 43 * gets here soon, because this basically is an error stub! (sorry) 44 * This code may not work anyway. 45 */ 46 47 #include <sys/param.h> 48 #include <sys/user.h> 49 #include <sys/proc.h> 50 #include <sys/stat.h> 51 #include <unistd.h> 52 #include <nlist.h> 53 #include <kvm.h> 54 55 #include <vm/vm.h> 56 #include <vm/vm_param.h> 57 58 #include <limits.h> 59 #include <db.h> 60 61 #include "kvm_private.h" 62 63 struct vmstate { 64 u_long end; 65 }; 66 67 void 68 _kvm_freevtop(kd) 69 kvm_t *kd; 70 { 71 if (kd->vmst != 0) 72 free(kd->vmst); 73 } 74 75 int 76 _kvm_initvtop(kd) 77 kvm_t *kd; 78 { 79 register int i; 80 register int off; 81 register struct vmstate *vm; 82 struct stat st; 83 struct nlist nlist[2]; 84 85 vm = (struct vmstate *)_kvm_malloc(kd, sizeof(*vm)); 86 if (vm == 0) 87 return (-1); 88 89 kd->vmst = vm; 90 91 if (fstat(kd->pmfd, &st) < 0) 92 return (-1); 93 94 /* Get end of kernel address */ 95 nlist[0].n_name = "_end"; 96 nlist[1].n_name = 0; 97 if (kvm_nlist(kd, nlist) != 0) { 98 _kvm_err(kd, kd->program, "pmap_stod: no such symbol"); 99 return (-1); 100 } 101 vm->end = (u_long)nlist[0].n_value; 102 103 return (0); 104 } 105 106 #define VA_OFF(va) (va & (NBPG - 1)) 107 108 /* 109 * Translate a kernel virtual address to a physical address using the 110 * mapping information in kd->vm. Returns the result in pa, and returns 111 * the number of bytes that are contiguously available from this 112 * physical address. This routine is used only for crashdumps. 113 */ 114 int 115 _kvm_kvatop(kd, va, pa) 116 kvm_t *kd; 117 u_long va; 118 u_long *pa; 119 { 120 register int end; 121 122 if (va < KERNBASE) { 123 _kvm_err(kd, 0, "invalid address (%x<%x)", va, KERNBASE); 124 return (0); 125 } 126 127 end = kd->vmst->end; 128 if (va >= end) { 129 _kvm_err(kd, 0, "invalid address (%x>=%x)", va, end); 130 return (0); 131 } 132 133 *pa = (va - KERNBASE); 134 return (end - va); 135 } 136