234 lines
6.3 KiB
C
234 lines
6.3 KiB
C
/* $NetBSD: kvm_m68k.c,v 1.8 1996/05/05 04:32:08 gwr Exp $ */
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/*-
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* Copyright (c) 1989, 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software developed by the Computer Systems
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* Engineering group at Lawrence Berkeley Laboratory under DARPA contract
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* BG 91-66 and contributed to Berkeley.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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#if 0
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static char sccsid[] = "@(#)kvm_hp300.c 8.1 (Berkeley) 6/4/93";
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#else
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static char *rcsid = "$NetBSD: kvm_m68k.c,v 1.8 1996/05/05 04:32:08 gwr Exp $";
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#endif
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#endif /* LIBC_SCCS and not lint */
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/*
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* m68k machine dependent routines for kvm. Hopefully, the forthcoming
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* vm code will one day obsolete this module.
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*/
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#include <sys/param.h>
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#include <sys/user.h>
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#include <sys/proc.h>
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#include <sys/stat.h>
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#include <sys/core.h>
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#include <sys/exec_aout.h>
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#include <sys/kcore.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 <vm/vm.h>
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#include <vm/vm_param.h>
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#include <db.h>
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#include "kvm_private.h"
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#include <machine/pte.h>
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#include <machine/kcore.h>
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#ifndef btop
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#define btop(x) (((unsigned)(x)) >> PGSHIFT) /* XXX */
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#define ptob(x) ((caddr_t)((x) << PGSHIFT)) /* XXX */
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#endif
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#define KREAD(kd, addr, p)\
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(kvm_read(kd, addr, (char *)(p), sizeof(*(p))) != sizeof(*(p)))
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void
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_kvm_freevtop(kd)
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kvm_t *kd;
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{
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if (kd->vmst != 0)
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free(kd->vmst);
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}
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int
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_kvm_initvtop(kd)
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kvm_t *kd;
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{
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return (0);
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}
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static int
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_kvm_vatop(kd, sta, va, pa)
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kvm_t *kd;
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st_entry_t *sta;
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u_long va;
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u_long *pa;
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{
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register cpu_kcore_hdr_t *cpu_kh;
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register u_long addr;
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int p, ste, pte;
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int offset;
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if (ISALIVE(kd)) {
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_kvm_err(kd, 0, "vatop called in live kernel!");
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return((off_t)0);
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}
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offset = va & PGOFSET;
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cpu_kh = kd->cpu_data;
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/*
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* If we are initializing (kernel segment table pointer not yet set)
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* then return pa == va to avoid infinite recursion.
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*/
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if (cpu_kh->sysseg_pa == 0) {
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*pa = va + cpu_kh->kernel_pa;
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return (NBPG - offset);
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}
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if (cpu_kh->mmutype == -2) {
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st_entry_t *sta2;
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addr = (u_long)&sta[va >> SG4_SHIFT1];
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/*
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* Can't use KREAD to read kernel segment table entries.
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* Fortunately it is 1-to-1 mapped so we don't have to.
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*/
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if (sta == cpu_kh->sysseg_pa) {
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if (lseek(kd->pmfd, _kvm_pa2off(kd, addr), 0) == -1 ||
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read(kd->pmfd, (char *)&ste, sizeof(ste)) < 0)
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goto invalid;
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} else if (KREAD(kd, addr, &ste))
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goto invalid;
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if ((ste & SG_V) == 0) {
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_kvm_err(kd, 0, "invalid level 1 descriptor (%x)",
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ste);
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return((off_t)0);
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}
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sta2 = (st_entry_t *)(ste & SG4_ADDR1);
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addr = (u_long)&sta2[(va & SG4_MASK2) >> SG4_SHIFT2];
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/*
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* Address from level 1 STE is a physical address,
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* so don't use kvm_read.
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*/
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if (lseek(kd->pmfd, _kvm_pa2off(kd, addr), 0) == -1 ||
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read(kd->pmfd, (char *)&ste, sizeof(ste)) < 0)
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goto invalid;
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if ((ste & SG_V) == 0) {
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_kvm_err(kd, 0, "invalid level 2 descriptor (%x)",
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ste);
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return((off_t)0);
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}
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sta2 = (st_entry_t *)(ste & SG4_ADDR2);
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addr = (u_long)&sta2[(va & SG4_MASK3) >> SG4_SHIFT3];
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} else {
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addr = (u_long)&sta[va >> SEGSHIFT];
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/*
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* Can't use KREAD to read kernel segment table entries.
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* Fortunately it is 1-to-1 mapped so we don't have to.
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*/
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if (sta == cpu_kh->sysseg_pa) {
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if (lseek(kd->pmfd, _kvm_pa2off(kd, addr), 0) == -1 ||
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read(kd->pmfd, (char *)&ste, sizeof(ste)) < 0)
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goto invalid;
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} else if (KREAD(kd, addr, &ste))
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goto invalid;
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if ((ste & SG_V) == 0) {
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_kvm_err(kd, 0, "invalid segment (%x)", ste);
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return((off_t)0);
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}
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p = btop(va & SG_PMASK);
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addr = (ste & SG_FRAME) + (p * sizeof(pt_entry_t));
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}
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/*
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* Address from STE is a physical address so don't use kvm_read.
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*/
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if (lseek(kd->pmfd, _kvm_pa2off(kd, addr), 0) == -1 ||
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read(kd->pmfd, (char *)&pte, sizeof(pte)) < 0)
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goto invalid;
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addr = pte & PG_FRAME;
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if (pte == PG_NV) {
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_kvm_err(kd, 0, "page not valid");
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return (0);
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}
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*pa = addr + offset;
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return (NBPG - offset);
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invalid:
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_kvm_err(kd, 0, "invalid address (%x)", va);
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return (0);
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}
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int
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_kvm_kvatop(kd, va, pa)
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kvm_t *kd;
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u_long va;
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u_long *pa;
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{
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register cpu_kcore_hdr_t *cpu_kh;
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cpu_kh = kd->cpu_data;
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return (_kvm_vatop(kd, (u_long)cpu_kh->sysseg_pa, va, pa));
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}
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/*
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* Translate a physical address to a file-offset in the crash-dump.
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*/
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off_t
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_kvm_pa2off(kd, pa)
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kvm_t *kd;
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u_long pa;
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{
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off_t off;
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phys_ram_seg_t *rsp;
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register cpu_kcore_hdr_t *cpu_kh;
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cpu_kh = kd->cpu_data;
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off = 0;
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for (rsp = cpu_kh->ram_segs; rsp->size; rsp++) {
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if (pa >= rsp->start && pa < rsp->start + rsp->size) {
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pa -= rsp->start;
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break;
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}
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off += rsp->size;
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}
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return(kd->dump_off + off + pa)
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}
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