1 /* $NetBSD: kvm_m68k.c,v 1.19 2014/01/27 21:00:01 matt 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 #include <sys/types.h> 46 47 #include <stdio.h> 48 #include <string.h> 49 #include <stdlib.h> 50 51 #include <unistd.h> 52 #include <limits.h> 53 #include <nlist.h> 54 #include <kvm.h> 55 #include <db.h> 56 57 #include <m68k/kcore.h> 58 59 #include "kvm_private.h" 60 #include "kvm_m68k.h" 61 62 __RCSID("$NetBSD: kvm_m68k.c,v 1.19 2014/01/27 21:00:01 matt Exp $"); 63 64 struct name_ops { 65 const char *name; 66 struct kvm_ops *ops; 67 }; 68 69 /* 70 * Match specific kcore types first, falling into a default. 71 */ 72 static struct name_ops optbl[] = { 73 { "sun2", &_kvm_ops_sun2 }, 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(kvm_t *kd) 85 { 86 cpu_kcore_hdr_t *h; 87 struct name_ops *nop; 88 struct vmstate *vm; 89 90 vm = (struct vmstate *)_kvm_malloc(kd, sizeof (*vm)); 91 if (vm == 0) 92 return (-1); 93 94 kd->vmst = vm; 95 96 /* 97 * Use the machine name in the kcore header to determine 98 * our ops vector. When we reach an ops vector with 99 * no name, we've found a default. 100 */ 101 h = kd->cpu_data; 102 h->name[sizeof(h->name) - 1] = '\0'; /* sanity */ 103 for (nop = optbl; nop->name != NULL; nop++) 104 if (strcmp(nop->name, h->name) == 0) 105 break; 106 107 vm->ops = nop->ops; 108 109 /* 110 * Compute pgshift and pgofset. 111 */ 112 for (vm->pgshift = 0; (1 << vm->pgshift) < h->page_size; vm->pgshift++) 113 /* nothing */ ; 114 if ((1 << vm->pgshift) != h->page_size) 115 goto bad; 116 vm->pgofset = h->page_size - 1; 117 118 if ((vm->ops->initvtop)(kd) < 0) 119 goto bad; 120 121 return (0); 122 123 bad: 124 kd->vmst = NULL; 125 free(vm); 126 return (-1); 127 } 128 129 void 130 _kvm_freevtop(kvm_t *kd) 131 { 132 (kd->vmst->ops->freevtop)(kd); 133 free(kd->vmst); 134 } 135 136 int 137 _kvm_kvatop(kvm_t *kd, vaddr_t va, paddr_t *pap) 138 { 139 return ((kd->vmst->ops->kvatop)(kd, va, pap)); 140 } 141 142 off_t 143 _kvm_pa2off(kvm_t *kd, paddr_t pa) 144 { 145 return ((kd->vmst->ops->pa2off)(kd, pa)); 146 } 147 148 /* 149 * Machine-dependent initialization for ALL open kvm descriptors, 150 * not just those for a kernel crash dump. Some architectures 151 * have to deal with these NOT being constants! (i.e. m68k) 152 */ 153 int 154 _kvm_mdopen(kvm_t *kd) 155 { 156 u_long max_uva; 157 extern struct ps_strings *__ps_strings; 158 159 #if 0 /* XXX - These vary across m68k machines... */ 160 kd->usrstack = USRSTACK; 161 kd->min_uva = VM_MIN_ADDRESS; 162 kd->max_uva = VM_MAXUSER_ADDRESS; 163 #endif 164 /* This is somewhat hack-ish, but it works. */ 165 max_uva = (u_long) (__ps_strings + 1); 166 kd->usrstack = max_uva; 167 kd->max_uva = max_uva; 168 kd->min_uva = 0; 169 170 return (0); 171 } 172