170 lines
4.3 KiB
C
170 lines
4.3 KiB
C
/* $NetBSD: kvm_m68k.c,v 1.20 2022/01/10 19:51:30 christos Exp $ */
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/*-
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* Copyright (c) 1997 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Gordon W. Ross and Jason R. Thorpe.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Run-time kvm dispatcher for m68k machines.
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* The actual MD code is in the files:
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* kvm_m68k_cmn.c kvm_sun3.c ...
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*
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* Note: This file has to build on ALL m68k machines,
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* so do NOT include any <machine/[*].h> files here.
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*/
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#include <sys/param.h>
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#include <sys/exec.h>
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#include <sys/kcore.h>
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#include <sys/sysctl.h>
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#include <sys/types.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <limits.h>
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#include <nlist.h>
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#include <kvm.h>
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#include <db.h>
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#include <m68k/kcore.h>
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#include "kvm_private.h"
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#include "kvm_m68k.h"
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__RCSID("$NetBSD: kvm_m68k.c,v 1.20 2022/01/10 19:51:30 christos Exp $");
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struct name_ops {
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const char *name;
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struct kvm_ops *ops;
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};
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/*
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* Match specific kcore types first, falling into a default.
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*/
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static struct name_ops optbl[] = {
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{ "sun2", &_kvm_ops_sun2 },
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{ "sun3", &_kvm_ops_sun3 },
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{ "sun3x", &_kvm_ops_sun3x },
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{ NULL, &_kvm_ops_cmn },
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};
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/*
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* Prepare for translation of kernel virtual addresses into offsets
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* into crash dump files. This is where we do the dispatch work.
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*/
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int
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_kvm_initvtop(kvm_t *kd)
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{
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cpu_kcore_hdr_t *h;
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struct name_ops *nop;
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struct vmstate *vm;
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vm = (struct vmstate *)_kvm_malloc(kd, sizeof (*vm));
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if (vm == 0)
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return (-1);
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kd->vmst = vm;
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/*
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* Use the machine name in the kcore header to determine
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* our ops vector. When we reach an ops vector with
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* no name, we've found a default.
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*/
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h = kd->cpu_data;
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h->name[sizeof(h->name) - 1] = '\0'; /* sanity */
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for (nop = optbl; nop->name != NULL; nop++)
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if (strcmp(nop->name, h->name) == 0)
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break;
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vm->ops = nop->ops;
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/*
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* Compute pgshift and pgofset.
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*/
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for (vm->pgshift = 0; (1 << vm->pgshift) < h->page_size; vm->pgshift++)
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/* nothing */ ;
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if ((1 << vm->pgshift) != h->page_size)
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goto bad;
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vm->pgofset = h->page_size - 1;
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if ((vm->ops->initvtop)(kd) < 0)
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goto bad;
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return (0);
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bad:
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kd->vmst = NULL;
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free(vm);
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return (-1);
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}
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void
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_kvm_freevtop(kvm_t *kd)
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{
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(kd->vmst->ops->freevtop)(kd);
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free(kd->vmst);
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}
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int
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_kvm_kvatop(kvm_t *kd, vaddr_t va, paddr_t *pap)
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{
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return ((kd->vmst->ops->kvatop)(kd, va, pap));
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}
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off_t
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_kvm_pa2off(kvm_t *kd, paddr_t pa)
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{
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return ((kd->vmst->ops->pa2off)(kd, pa));
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}
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/*
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* Machine-dependent initialization for ALL open kvm descriptors,
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* not just those for a kernel crash dump. Some architectures
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* have to deal with these NOT being constants! (i.e. m68k)
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*/
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int
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_kvm_mdopen(kvm_t *kd)
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{
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u_long max_uva;
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extern struct ps_strings *__ps_strings;
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#if 0 /* XXX - These vary across m68k machines... */
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kd->min_uva = VM_MIN_ADDRESS;
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kd->max_uva = VM_MAXUSER_ADDRESS;
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#endif
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/* This is somewhat hack-ish, but it works. */
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max_uva = (u_long) (__ps_strings + 1);
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kd->max_uva = max_uva;
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kd->min_uva = 0;
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return (0);
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}
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