lib/libkvm/kvm_vax.c

   1 /*      $NetBSD: kvm_vax.c,v 1.15 2003/05/16 10:24:56 wiz Exp $ */
   2
   3 /*-
   4  * Copyright (c) 1992, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This code is derived from software developed by the Computer Systems
   8  * Engineering group at Lawrence Berkeley Laboratory under DARPA contract
   9  * BG 91-66 and contributed to Berkeley.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. Neither the name of the University nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 /*
  37  * VAX machine dependent routines for kvm.  Hopefully, the forthcoming
  38  * vm code will one day obsolete this module.  Furthermore, I hope it
  39  * gets here soon, because this basically is an error stub! (sorry)
  40  * This code may not work anyway.
  41  */
  42
  43 #include <sys/param.h>
  44 #include <sys/user.h>
  45 #include <sys/proc.h>
  46 #include <sys/stat.h>
  47 #include <unistd.h>
  48 #include <nlist.h>
  49 #include <stdlib.h>
  50 #include <kvm.h>
  51
  52 #include <uvm/uvm_extern.h>
  53
  54 #include <machine/vmparam.h>
  55
  56 #include <limits.h>
  57 #include <db.h>
  58
  59 #include "kvm_private.h"
  60
  61
  62 struct vmstate {
  63         u_long end;
  64 };
  65
  66 void
  67 _kvm_freevtop(kd)
  68         kvm_t *kd;
  69 {
  70         if (kd->vmst != 0)
  71                 free(kd->vmst);
  72 }
  73
  74 int
  75 _kvm_initvtop(kd)
  76         kvm_t *kd;
  77 {
  78         struct vmstate *vm;
  79         struct stat st;
  80         struct nlist nl[2];
  81
  82         vm = (struct vmstate *)_kvm_malloc(kd, sizeof(*vm));
  83         if (vm == 0)
  84                 return (-1);
  85
  86         kd->vmst = vm;
  87
  88         if (fstat(kd->pmfd, &st) < 0)
  89                 return (-1);
  90
  91         /* Get end of kernel address */
  92         nl[0].n_name = "_end";
  93         nl[1].n_name = 0;
  94         if (kvm_nlist(kd, nl) != 0) {
  95                 _kvm_err(kd, kd->program, "pmap_stod: no such symbol");
  96                 return (-1);
  97         }
  98         vm->end = (u_long)nl[0].n_value;
  99
 100         return (0);
 101 }
 102
 103 #define VA_OFF(va) (va & (NBPG - 1))
 104
 105 /*
 106  * Translate a kernel virtual address to a physical address using the
 107  * mapping information in kd->vm.  Returns the result in pa, and returns
 108  * the number of bytes that are contiguously available from this
 109  * physical address.  This routine is used only for crash dumps.
 110  */
 111 int
 112 _kvm_kvatop(kd, va, pa)
 113         kvm_t *kd;
 114         u_long va;
 115         u_long *pa;
 116 {
 117         u_long end;
 118
 119         if (va < (u_long) KERNBASE) {
 120                 _kvm_err(kd, 0, "invalid address (%lx<%lx)", va, (u_long) KERNBASE);
 121                 return (0);
 122         }
 123
 124         end = kd->vmst->end;
 125         if (va >= end) {
 126                 _kvm_err(kd, 0, "invalid address (%lx>=%lx)", va, end);
 127                 return (0);
 128         }
 129
 130         *pa = (va - (u_long) KERNBASE);
 131         return (end - va);
 132 }
 133
 134 /*
 135  * Translate a physical address to a file-offset in the crash dump.
 136  * XXX - crash dump doesn't work anyway.
 137  */
 138 off_t
 139 _kvm_pa2off(kd, pa)
 140         kvm_t   *kd;
 141         u_long  pa;
 142 {
 143         return(kd->dump_off + pa);
 144 }
 145
 146
 147 /*
 148  * Machine-dependent initialization for ALL open kvm descriptors,
 149  * not just those for a kernel crash dump.  Some architectures
 150  * have to deal with these NOT being constants!  (i.e. m68k)
 151  */
 152 int
 153 _kvm_mdopen(kd)
 154         kvm_t   *kd;
 155 {
 156
 157         kd->usrstack = USRSTACK;
 158         kd->min_uva = VM_MIN_ADDRESS;
 159         kd->max_uva = VM_MAXUSER_ADDRESS;
 160
 161         return (0);
 162 }