1 /* $NetBSD: kvm_m68k.c,v 1.12 1997/08/12 16:34:09 gwr 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 * 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 NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Run-time kvm dispatcher for m68k machines. 41 * The actual MD code is in the files: 42 * kvm_m68k_cmn.c kvm_sun3.c ... 43 */ 44 45 #include <sys/param.h> 46 #include <sys/exec.h> 47 #include <sys/kcore.h> 48 #include <sys/sysctl.h> 49 50 #include <stdio.h> 51 #include <string.h> 52 #include <stdlib.h> 53 54 #include <unistd.h> 55 #include <limits.h> 56 #include <nlist.h> 57 #include <kvm.h> 58 #include <db.h> 59 60 #include <machine/kcore.h> 61 62 #include "kvm_private.h" 63 #include "kvm_m68k.h" 64 65 struct name_ops { 66 const char *name; 67 struct kvm_ops *ops; 68 }; 69 70 /* 71 * Match specific kcore types first, falling into a default. 72 */ 73 static struct name_ops optbl[] = { 74 { "sun3", &_kvm_ops_sun3 }, 75 { "sun3x", &_kvm_ops_sun3x }, 76 { NULL, &_kvm_ops_cmn }, 77 }; 78 79 /* 80 * Prepare for translation of kernel virtual addresses into offsets 81 * into crash dump files. This is where we do the dispatch work. 82 */ 83 int 84 _kvm_initvtop(kd) 85 kvm_t *kd; 86 { 87 cpu_kcore_hdr_t *h; 88 struct name_ops *nop; 89 struct vmstate *vm; 90 91 vm = (struct vmstate *)_kvm_malloc(kd, sizeof (*vm)); 92 if (vm == 0) 93 return (-1); 94 95 kd->vmst = vm; 96 97 /* 98 * Use the machine name in the kcore header to determine 99 * our ops vector. When we reach an ops vector with 100 * no name, we've found a default. 101 */ 102 h = kd->cpu_data; 103 h->name[sizeof(h->name) - 1] = '\0'; /* sanity */ 104 for (nop = optbl; nop->name != NULL; nop++) 105 if (strcmp(nop->name, h->name) == 0) 106 break; 107 108 vm->ops = nop->ops; 109 110 /* 111 * Compute pgshift and pgofset. 112 */ 113 for (vm->pgshift = 0; (1 << vm->pgshift) < h->page_size; vm->pgshift++) 114 /* nothing */ ; 115 if ((1 << vm->pgshift) != h->page_size) 116 goto bad; 117 vm->pgofset = h->page_size - 1; 118 119 if ((vm->ops->initvtop)(kd) < 0) 120 goto bad; 121 122 return (0); 123 124 bad: 125 kd->vmst = NULL; 126 free(vm); 127 return (-1); 128 } 129 130 void 131 _kvm_freevtop(kd) 132 kvm_t *kd; 133 { 134 (kd->vmst->ops->freevtop)(kd); 135 free(kd->vmst); 136 } 137 138 int 139 _kvm_kvatop(kd, va, pap) 140 kvm_t *kd; 141 u_long va; 142 u_long *pap; 143 { 144 return ((kd->vmst->ops->kvatop)(kd, va, pap)); 145 } 146 147 off_t 148 _kvm_pa2off(kd, pa) 149 kvm_t *kd; 150 u_long pa; 151 { 152 return ((kd->vmst->ops->pa2off)(kd, pa)); 153 } 154 155 /* 156 * Machine-dependent initialization for ALL open kvm descriptors, 157 * not just those for a kernel crash dump. Some architectures 158 * have to deal with these NOT being constants! (i.e. m68k) 159 */ 160 int 161 _kvm_mdopen(kd) 162 kvm_t *kd; 163 { 164 u_long max_uva; 165 extern struct ps_strings *__ps_strings; 166 167 #if 0 /* XXX - These vary across m68k machines... */ 168 kd->usrstack = USRSTACK; 169 kd->min_uva = VM_MIN_ADDRESS; 170 kd->max_uva = VM_MAXUSER_ADDRESS; 171 #endif 172 /* This is somewhat hack-ish, but it works. */ 173 max_uva = (u_long) (__ps_strings + 1); 174 kd->usrstack = max_uva; 175 kd->max_uva = max_uva; 176 kd->min_uva = 0; 177 178 return (0); 179 } 180