1 /* $NetBSD: kvm_vax.c,v 1.14 2001/11/29 23:32:42 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 <stdlib.h> 54 #include <kvm.h> 55 56 #include <uvm/uvm_extern.h> 57 58 #include <machine/vmparam.h> 59 60 #include <limits.h> 61 #include <db.h> 62 63 #include "kvm_private.h" 64 65 66 struct vmstate { 67 u_long end; 68 }; 69 70 void 71 _kvm_freevtop(kd) 72 kvm_t *kd; 73 { 74 if (kd->vmst != 0) 75 free(kd->vmst); 76 } 77 78 int 79 _kvm_initvtop(kd) 80 kvm_t *kd; 81 { 82 struct vmstate *vm; 83 struct stat st; 84 struct nlist nl[2]; 85 86 vm = (struct vmstate *)_kvm_malloc(kd, sizeof(*vm)); 87 if (vm == 0) 88 return (-1); 89 90 kd->vmst = vm; 91 92 if (fstat(kd->pmfd, &st) < 0) 93 return (-1); 94 95 /* Get end of kernel address */ 96 nl[0].n_name = "_end"; 97 nl[1].n_name = 0; 98 if (kvm_nlist(kd, nl) != 0) { 99 _kvm_err(kd, kd->program, "pmap_stod: no such symbol"); 100 return (-1); 101 } 102 vm->end = (u_long)nl[0].n_value; 103 104 return (0); 105 } 106 107 #define VA_OFF(va) (va & (NBPG - 1)) 108 109 /* 110 * Translate a kernel virtual address to a physical address using the 111 * mapping information in kd->vm. Returns the result in pa, and returns 112 * the number of bytes that are contiguously available from this 113 * physical address. This routine is used only for crashdumps. 114 */ 115 int 116 _kvm_kvatop(kd, va, pa) 117 kvm_t *kd; 118 u_long va; 119 u_long *pa; 120 { 121 u_long end; 122 123 if (va < (u_long) KERNBASE) { 124 _kvm_err(kd, 0, "invalid address (%lx<%lx)", va, (u_long) KERNBASE); 125 return (0); 126 } 127 128 end = kd->vmst->end; 129 if (va >= end) { 130 _kvm_err(kd, 0, "invalid address (%lx>=%lx)", va, end); 131 return (0); 132 } 133 134 *pa = (va - (u_long) KERNBASE); 135 return (end - va); 136 } 137 138 /* 139 * Translate a physical address to a file-offset in the crash-dump. 140 * XXX - crash-dumps doesn't work anyway. 141 */ 142 off_t 143 _kvm_pa2off(kd, pa) 144 kvm_t *kd; 145 u_long pa; 146 { 147 return(kd->dump_off + pa); 148 } 149 150 151 /* 152 * Machine-dependent initialization for ALL open kvm descriptors, 153 * not just those for a kernel crash dump. Some architectures 154 * have to deal with these NOT being constants! (i.e. m68k) 155 */ 156 int 157 _kvm_mdopen(kd) 158 kvm_t *kd; 159 { 160 161 kd->usrstack = USRSTACK; 162 kd->min_uva = VM_MIN_ADDRESS; 163 kd->max_uva = VM_MAXUSER_ADDRESS; 164 165 return (0); 166 } 167