NetBSD/lib/libkvm/kvm_ns32k.c

185 lines
4.9 KiB
C

/* $NetBSD: kvm_ns32k.c,v 1.15 2001/09/17 12:48:20 simonb Exp $ */
/*-
* Copyright (c) 1989, 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software developed by the Computer Systems
* Engineering group at Lawrence Berkeley Laboratory under DARPA contract
* BG 91-66 and contributed to Berkeley.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
#if 0
static char sccsid[] = "@(#)kvm_hp300.c 8.1 (Berkeley) 6/4/93";
#else
__RCSID("$NetBSD: kvm_ns32k.c,v 1.15 2001/09/17 12:48:20 simonb Exp $");
#endif
#endif /* LIBC_SCCS and not lint */
/*
* ns32k machine dependent routines for kvm. Hopefully, the forthcoming
* vm code will one day obsolete this module.
*/
#include <sys/param.h>
#include <sys/user.h>
#include <sys/proc.h>
#include <sys/stat.h>
#include <sys/core.h>
#include <sys/exec_aout.h>
#include <sys/kcore.h>
#include <stdlib.h>
#include <unistd.h>
#include <limits.h>
#include <nlist.h>
#include <kvm.h>
#include <uvm/uvm_extern.h>
#include <db.h>
#include "kvm_private.h"
#include <machine/pmap.h>
#include <machine/pte.h>
#include <machine/kcore.h>
#include <machine/vmparam.h>
#ifndef btop
#define btop(x) (((unsigned)(x)) >> PGSHIFT) /* XXX */
#define ptob(x) ((caddr_t)((x) << PGSHIFT)) /* XXX */
#endif
#define KREAD(kd, addr, p)\
(kvm_read(kd, addr, (char *)(p), sizeof(*(p))) != sizeof(*(p)))
void
_kvm_freevtop(kd)
kvm_t *kd;
{
if (kd->vmst != 0)
free(kd->vmst);
}
int
_kvm_initvtop(kd)
kvm_t *kd;
{
return (0);
}
/*
* Translate a kernel virtual address to a physical address.
*/
int
_kvm_kvatop(kd, va, pa)
kvm_t *kd;
u_long va;
u_long *pa;
{
cpu_kcore_hdr_t *cpu_kh;
u_long offset;
u_long pte_pa;
u_long pde_pa;
pd_entry_t pde;
pt_entry_t pte;
if (ISALIVE(kd)) {
_kvm_err(kd, 0, "vatop called in live kernel!");
return(0);
}
offset = va & PGOFSET;
cpu_kh = kd->cpu_data;
/*
* If we are initializing (kernel page table descriptor pointer
* not yet set) * then return pa == va to avoid infinite recursion.
*/
if (cpu_kh->ptd == 0) {
*pa = va;
return (NBPG - offset);
}
pde_pa = _kvm_pa2off(kd, cpu_kh->ptd + sizeof(pt_entry_t) * pdei(va));
if (pread(kd->pmfd, &pde, sizeof(pde), (off_t)pde_pa) != sizeof(pde)) {
_kvm_syserr(kd, kd->program, "could not read PDE");
goto invalid;
}
if ((pde & PG_V) == 0)
goto invalid;
pte_pa = _kvm_pa2off(kd, (pde & PG_FRAME) + sizeof(pt_entry_t) * ptei(va));
if (pread(kd->pmfd, &pte, sizeof(pte), (off_t)pte_pa) != sizeof(pte)) {
_kvm_syserr(kd, kd->program, "could not read PTE");
goto invalid;
}
*pa = (pte & PG_FRAME) + offset;
return (NBPG - offset);
invalid:
_kvm_err(kd, 0, "invalid address (%lx)", va);
return (0);
}
/*
* Translate a physical address to a file-offset in the crash-dump.
*/
off_t
_kvm_pa2off(kd, pa)
kvm_t *kd;
u_long pa;
{
return(kd->dump_off + pa);
}
/*
* Machine-dependent initialization for ALL open kvm descriptors,
* not just those for a kernel crash dump. Some architectures
* have to deal with these NOT being constants! (i.e. m68k)
*/
int
_kvm_mdopen(kd)
kvm_t *kd;
{
kd->usrstack = USRSTACK;
kd->min_uva = VM_MIN_ADDRESS;
kd->max_uva = VM_MAXUSER_ADDRESS;
return (0);
}