1 /* $NetBSD: kvm_m68k.c,v 1.13 1997/10/28 16:52:25 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 * Note: This file has to build on ALL m68k machines, 45 * so do NOT include any <machine/*.h> files here. 46 */ 47 48 #include <sys/param.h> 49 #include <sys/exec.h> 50 #include <sys/kcore.h> 51 #include <sys/sysctl.h> 52 53 #include <stdio.h> 54 #include <string.h> 55 #include <stdlib.h> 56 57 #include <unistd.h> 58 #include <limits.h> 59 #include <nlist.h> 60 #include <kvm.h> 61 #include <db.h> 62 63 #include <m68k/kcore.h> 64 65 #include "kvm_private.h" 66 #include "kvm_m68k.h" 67 68 struct name_ops { 69 const char *name; 70 struct kvm_ops *ops; 71 }; 72 73 /* 74 * Match specific kcore types first, falling into a default. 75 */ 76 static struct name_ops optbl[] = { 77 { "sun3", &_kvm_ops_sun3 }, 78 { "sun3x", &_kvm_ops_sun3x }, 79 { NULL, &_kvm_ops_cmn }, 80 }; 81 82 /* 83 * Prepare for translation of kernel virtual addresses into offsets 84 * into crash dump files. This is where we do the dispatch work. 85 */ 86 int 87 _kvm_initvtop(kd) 88 kvm_t *kd; 89 { 90 cpu_kcore_hdr_t *h; 91 struct name_ops *nop; 92 struct vmstate *vm; 93 94 vm = (struct vmstate *)_kvm_malloc(kd, sizeof (*vm)); 95 if (vm == 0) 96 return (-1); 97 98 kd->vmst = vm; 99 100 /* 101 * Use the machine name in the kcore header to determine 102 * our ops vector. When we reach an ops vector with 103 * no name, we've found a default. 104 */ 105 h = kd->cpu_data; 106 h->name[sizeof(h->name) - 1] = '\0'; /* sanity */ 107 for (nop = optbl; nop->name != NULL; nop++) 108 if (strcmp(nop->name, h->name) == 0) 109 break; 110 111 vm->ops = nop->ops; 112 113 /* 114 * Compute pgshift and pgofset. 115 */ 116 for (vm->pgshift = 0; (1 << vm->pgshift) < h->page_size; vm->pgshift++) 117 /* nothing */ ; 118 if ((1 << vm->pgshift) != h->page_size) 119 goto bad; 120 vm->pgofset = h->page_size - 1; 121 122 if ((vm->ops->initvtop)(kd) < 0) 123 goto bad; 124 125 return (0); 126 127 bad: 128 kd->vmst = NULL; 129 free(vm); 130 return (-1); 131 } 132 133 void 134 _kvm_freevtop(kd) 135 kvm_t *kd; 136 { 137 (kd->vmst->ops->freevtop)(kd); 138 free(kd->vmst); 139 } 140 141 int 142 _kvm_kvatop(kd, va, pap) 143 kvm_t *kd; 144 u_long va; 145 u_long *pap; 146 { 147 return ((kd->vmst->ops->kvatop)(kd, va, pap)); 148 } 149 150 off_t 151 _kvm_pa2off(kd, pa) 152 kvm_t *kd; 153 u_long pa; 154 { 155 return ((kd->vmst->ops->pa2off)(kd, pa)); 156 } 157 158 /* 159 * Machine-dependent initialization for ALL open kvm descriptors, 160 * not just those for a kernel crash dump. Some architectures 161 * have to deal with these NOT being constants! (i.e. m68k) 162 */ 163 int 164 _kvm_mdopen(kd) 165 kvm_t *kd; 166 { 167 u_long max_uva; 168 extern struct ps_strings *__ps_strings; 169 170 #if 0 /* XXX - These vary across m68k machines... */ 171 kd->usrstack = USRSTACK; 172 kd->min_uva = VM_MIN_ADDRESS; 173 kd->max_uva = VM_MAXUSER_ADDRESS; 174 #endif 175 /* This is somewhat hack-ish, but it works. */ 176 max_uva = (u_long) (__ps_strings + 1); 177 kd->usrstack = max_uva; 178 kd->max_uva = max_uva; 179 kd->min_uva = 0; 180 181 return (0); 182 } 183