lib/libkvm/kvm_m68k.c

   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 }