lib/libkvm/kvm_m68k.c

   1 /*      $NetBSD: kvm_m68k.c,v 1.15 2001/05/21 14:56:29 fredette 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 }