1 /* $NetBSD: kvm_vax.c,v 1.16 2003/08/07 16:44:40 agc 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. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 /* 37 * VAX machine dependent routines for kvm. Hopefully, the forthcoming 38 * vm code will one day obsolete this module. Furthermore, I hope it 39 * gets here soon, because this basically is an error stub! (sorry) 40 * This code may not work anyway. 41 */ 42 43 #include <sys/param.h> 44 #include <sys/user.h> 45 #include <sys/proc.h> 46 #include <sys/stat.h> 47 #include <unistd.h> 48 #include <nlist.h> 49 #include <stdlib.h> 50 #include <kvm.h> 51 52 #include <uvm/uvm_extern.h> 53 54 #include <machine/vmparam.h> 55 56 #include <limits.h> 57 #include <db.h> 58 59 #include "kvm_private.h" 60 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 struct vmstate *vm; 79 struct stat st; 80 struct nlist nl[2]; 81 82 vm = (struct vmstate *)_kvm_malloc(kd, sizeof(*vm)); 83 if (vm == 0) 84 return (-1); 85 86 kd->vmst = vm; 87 88 if (fstat(kd->pmfd, &st) < 0) 89 return (-1); 90 91 /* Get end of kernel address */ 92 nl[0].n_name = "_end"; 93 nl[1].n_name = 0; 94 if (kvm_nlist(kd, nl) != 0) { 95 _kvm_err(kd, kd->program, "pmap_stod: no such symbol"); 96 return (-1); 97 } 98 vm->end = (u_long)nl[0].n_value; 99 100 return (0); 101 } 102 103 #define VA_OFF(va) (va & (NBPG - 1)) 104 105 /* 106 * Translate a kernel virtual address to a physical address using the 107 * mapping information in kd->vm. Returns the result in pa, and returns 108 * the number of bytes that are contiguously available from this 109 * physical address. This routine is used only for crash dumps. 110 */ 111 int 112 _kvm_kvatop(kd, va, pa) 113 kvm_t *kd; 114 u_long va; 115 u_long *pa; 116 { 117 u_long end; 118 119 if (va < (u_long) KERNBASE) { 120 _kvm_err(kd, 0, "invalid address (%lx<%lx)", va, (u_long) KERNBASE); 121 return (0); 122 } 123 124 end = kd->vmst->end; 125 if (va >= end) { 126 _kvm_err(kd, 0, "invalid address (%lx>=%lx)", va, end); 127 return (0); 128 } 129 130 *pa = (va - (u_long) KERNBASE); 131 return (end - va); 132 } 133 134 /* 135 * Translate a physical address to a file-offset in the crash dump. 136 * XXX - crash dump doesn't work anyway. 137 */ 138 off_t 139 _kvm_pa2off(kd, pa) 140 kvm_t *kd; 141 u_long pa; 142 { 143 return(kd->dump_off + pa); 144 } 145 146 147 /* 148 * Machine-dependent initialization for ALL open kvm descriptors, 149 * not just those for a kernel crash dump. Some architectures 150 * have to deal with these NOT being constants! (i.e. m68k) 151 */ 152 int 153 _kvm_mdopen(kd) 154 kvm_t *kd; 155 { 156 157 kd->usrstack = USRSTACK; 158 kd->min_uva = VM_MIN_ADDRESS; 159 kd->max_uva = VM_MAXUSER_ADDRESS; 160 161 return (0); 162 } 163