1 /* $NetBSD: kvm_m68k.c,v 1.16 2008/04/28 20:23:01 martin Exp $ */ 2 3 /*- 4 * Copyright (c) 1997 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Gordon W. Ross and Jason R. Thorpe. 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Run-time kvm dispatcher for m68k machines. 34 * The actual MD code is in the files: 35 * kvm_m68k_cmn.c kvm_sun3.c ... 36 * 37 * Note: This file has to build on ALL m68k machines, 38 * so do NOT include any <machine/[*].h> files here. 39 */ 40 41 #include <sys/param.h> 42 #include <sys/exec.h> 43 #include <sys/kcore.h> 44 #include <sys/sysctl.h> 45 46 #include <stdio.h> 47 #include <string.h> 48 #include <stdlib.h> 49 50 #include <unistd.h> 51 #include <limits.h> 52 #include <nlist.h> 53 #include <kvm.h> 54 #include <db.h> 55 56 #include <m68k/kcore.h> 57 58 #include "kvm_private.h" 59 #include "kvm_m68k.h" 60 61 struct name_ops { 62 const char *name; 63 struct kvm_ops *ops; 64 }; 65 66 /* 67 * Match specific kcore types first, falling into a default. 68 */ 69 static struct name_ops optbl[] = { 70 { "sun2", &_kvm_ops_sun2 }, 71 { "sun3", &_kvm_ops_sun3 }, 72 { "sun3x", &_kvm_ops_sun3x }, 73 { NULL, &_kvm_ops_cmn }, 74 }; 75 76 /* 77 * Prepare for translation of kernel virtual addresses into offsets 78 * into crash dump files. This is where we do the dispatch work. 79 */ 80 int 81 _kvm_initvtop(kd) 82 kvm_t *kd; 83 { 84 cpu_kcore_hdr_t *h; 85 struct name_ops *nop; 86 struct vmstate *vm; 87 88 vm = (struct vmstate *)_kvm_malloc(kd, sizeof (*vm)); 89 if (vm == 0) 90 return (-1); 91 92 kd->vmst = vm; 93 94 /* 95 * Use the machine name in the kcore header to determine 96 * our ops vector. When we reach an ops vector with 97 * no name, we've found a default. 98 */ 99 h = kd->cpu_data; 100 h->name[sizeof(h->name) - 1] = '\0'; /* sanity */ 101 for (nop = optbl; nop->name != NULL; nop++) 102 if (strcmp(nop->name, h->name) == 0) 103 break; 104 105 vm->ops = nop->ops; 106 107 /* 108 * Compute pgshift and pgofset. 109 */ 110 for (vm->pgshift = 0; (1 << vm->pgshift) < h->page_size; vm->pgshift++) 111 /* nothing */ ; 112 if ((1 << vm->pgshift) != h->page_size) 113 goto bad; 114 vm->pgofset = h->page_size - 1; 115 116 if ((vm->ops->initvtop)(kd) < 0) 117 goto bad; 118 119 return (0); 120 121 bad: 122 kd->vmst = NULL; 123 free(vm); 124 return (-1); 125 } 126 127 void 128 _kvm_freevtop(kd) 129 kvm_t *kd; 130 { 131 (kd->vmst->ops->freevtop)(kd); 132 free(kd->vmst); 133 } 134 135 int 136 _kvm_kvatop(kd, va, pap) 137 kvm_t *kd; 138 u_long va; 139 u_long *pap; 140 { 141 return ((kd->vmst->ops->kvatop)(kd, va, pap)); 142 } 143 144 off_t 145 _kvm_pa2off(kd, pa) 146 kvm_t *kd; 147 u_long pa; 148 { 149 return ((kd->vmst->ops->pa2off)(kd, pa)); 150 } 151 152 /* 153 * Machine-dependent initialization for ALL open kvm descriptors, 154 * not just those for a kernel crash dump. Some architectures 155 * have to deal with these NOT being constants! (i.e. m68k) 156 */ 157 int 158 _kvm_mdopen(kd) 159 kvm_t *kd; 160 { 161 u_long max_uva; 162 extern struct ps_strings *__ps_strings; 163 164 #if 0 /* XXX - These vary across m68k machines... */ 165 kd->usrstack = USRSTACK; 166 kd->min_uva = VM_MIN_ADDRESS; 167 kd->max_uva = VM_MAXUSER_ADDRESS; 168 #endif 169 /* This is somewhat hack-ish, but it works. */ 170 max_uva = (u_long) (__ps_strings + 1); 171 kd->usrstack = max_uva; 172 kd->max_uva = max_uva; 173 kd->min_uva = 0; 174 175 return (0); 176 } 177