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kvm_m68k.c revision 1.15.34.1 
      1 /*	$NetBSD: kvm_m68k.c,v 1.15.34.1 2008/05/18 12:30:38 yamt 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 }
    177