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kvm_m68k.c revision 1.15 
      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  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 /*
     40  * Run-time kvm dispatcher for m68k machines.
     41  * The actual MD code is in the files:
     42  * kvm_m68k_cmn.c kvm_sun3.c ...
     43  *
     44  * Note: This file has to build on ALL m68k machines,
     45  * so do NOT include any <machine/[*].h> files here.
     46  */
     47 
     48 #include <sys/param.h>
     49 #include <sys/exec.h>
     50 #include <sys/kcore.h>
     51 #include <sys/sysctl.h>
     52 
     53 #include <stdio.h>
     54 #include <string.h>
     55 #include <stdlib.h>
     56 
     57 #include <unistd.h>
     58 #include <limits.h>
     59 #include <nlist.h>
     60 #include <kvm.h>
     61 #include <db.h>
     62 
     63 #include <m68k/kcore.h>
     64 
     65 #include "kvm_private.h"
     66 #include "kvm_m68k.h"
     67 
     68 struct name_ops {
     69 	const char *name;
     70 	struct kvm_ops *ops;
     71 };
     72 
     73 /*
     74  * Match specific kcore types first, falling into a default.
     75  */
     76 static struct name_ops optbl[] = {
     77 	{ "sun2",	&_kvm_ops_sun2 },
     78 	{ "sun3",	&_kvm_ops_sun3 },
     79 	{ "sun3x",	&_kvm_ops_sun3x },
     80 	{ NULL,		&_kvm_ops_cmn },
     81 };
     82 
     83 /*
     84  * Prepare for translation of kernel virtual addresses into offsets
     85  * into crash dump files.  This is where we do the dispatch work.
     86  */
     87 int
     88 _kvm_initvtop(kd)
     89 	kvm_t *kd;
     90 {
     91 	cpu_kcore_hdr_t *h;
     92 	struct name_ops *nop;
     93 	struct vmstate *vm;
     94 
     95 	vm = (struct vmstate *)_kvm_malloc(kd, sizeof (*vm));
     96 	if (vm == 0)
     97 		return (-1);
     98 
     99 	kd->vmst = vm;
    100 
    101 	/*
    102 	 * Use the machine name in the kcore header to determine
    103 	 * our ops vector.  When we reach an ops vector with
    104 	 * no name, we've found a default.
    105 	 */
    106 	h = kd->cpu_data;
    107 	h->name[sizeof(h->name) - 1] = '\0';	/* sanity */
    108 	for (nop = optbl; nop->name != NULL; nop++)
    109 		if (strcmp(nop->name, h->name) == 0)
    110 			break;
    111 
    112 	vm->ops = nop->ops;
    113 
    114 	/*
    115 	 * Compute pgshift and pgofset.
    116 	 */
    117 	for (vm->pgshift = 0; (1 << vm->pgshift) < h->page_size; vm->pgshift++)
    118 		/* nothing */ ;
    119 	if ((1 << vm->pgshift) != h->page_size)
    120 		goto bad;
    121 	vm->pgofset = h->page_size - 1;
    122 
    123 	if ((vm->ops->initvtop)(kd) < 0)
    124 		goto bad;
    125 
    126 	return (0);
    127 
    128  bad:
    129 	kd->vmst = NULL;
    130 	free(vm);
    131 	return (-1);
    132 }
    133 
    134 void
    135 _kvm_freevtop(kd)
    136 	kvm_t *kd;
    137 {
    138 	(kd->vmst->ops->freevtop)(kd);
    139 	free(kd->vmst);
    140 }
    141 
    142 int
    143 _kvm_kvatop(kd, va, pap)
    144 	kvm_t *kd;
    145 	u_long va;
    146 	u_long *pap;
    147 {
    148 	return ((kd->vmst->ops->kvatop)(kd, va, pap));
    149 }
    150 
    151 off_t
    152 _kvm_pa2off(kd, pa)
    153 	kvm_t	*kd;
    154 	u_long	pa;
    155 {
    156 	return ((kd->vmst->ops->pa2off)(kd, pa));
    157 }
    158 
    159 /*
    160  * Machine-dependent initialization for ALL open kvm descriptors,
    161  * not just those for a kernel crash dump.  Some architectures
    162  * have to deal with these NOT being constants!  (i.e. m68k)
    163  */
    164 int
    165 _kvm_mdopen(kd)
    166 	kvm_t	*kd;
    167 {
    168 	u_long max_uva;
    169 	extern struct ps_strings *__ps_strings;
    170 
    171 #if 0	/* XXX - These vary across m68k machines... */
    172 	kd->usrstack = USRSTACK;
    173 	kd->min_uva = VM_MIN_ADDRESS;
    174 	kd->max_uva = VM_MAXUSER_ADDRESS;
    175 #endif
    176 	/* This is somewhat hack-ish, but it works. */
    177 	max_uva = (u_long) (__ps_strings + 1);
    178 	kd->usrstack = max_uva;
    179 	kd->max_uva  = max_uva;
    180 	kd->min_uva  = 0;
    181 
    182 	return (0);
    183 }
    184