NetBSD/lib/libkvm/kvm_vax.c

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/* $NetBSD: kvm_vax.c,v 1.14 2001/11/29 23:32:42 thorpej Exp $ */
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/*-
* Copyright (c) 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.
*/
/*
* VAX machine dependent routines for kvm. Hopefully, the forthcoming
* vm code will one day obsolete this module. Furthermore, I hope it
* gets here soon, because this basically is an error stub! (sorry)
* This code may not work anyway.
*/
#include <sys/param.h>
#include <sys/user.h>
#include <sys/proc.h>
#include <sys/stat.h>
#include <unistd.h>
#include <nlist.h>
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#include <stdlib.h>
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#include <kvm.h>
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#include <uvm/uvm_extern.h>
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#include <machine/vmparam.h>
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#include <limits.h>
#include <db.h>
#include "kvm_private.h"
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struct vmstate {
u_long end;
};
void
_kvm_freevtop(kd)
kvm_t *kd;
{
if (kd->vmst != 0)
free(kd->vmst);
}
int
_kvm_initvtop(kd)
kvm_t *kd;
{
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struct vmstate *vm;
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struct stat st;
struct nlist nl[2];
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vm = (struct vmstate *)_kvm_malloc(kd, sizeof(*vm));
if (vm == 0)
return (-1);
kd->vmst = vm;
if (fstat(kd->pmfd, &st) < 0)
return (-1);
/* Get end of kernel address */
nl[0].n_name = "_end";
nl[1].n_name = 0;
if (kvm_nlist(kd, nl) != 0) {
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_kvm_err(kd, kd->program, "pmap_stod: no such symbol");
return (-1);
}
vm->end = (u_long)nl[0].n_value;
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return (0);
}
#define VA_OFF(va) (va & (NBPG - 1))
/*
* Translate a kernel virtual address to a physical address using the
* mapping information in kd->vm. Returns the result in pa, and returns
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* the number of bytes that are contiguously available from this
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* physical address. This routine is used only for crashdumps.
*/
int
_kvm_kvatop(kd, va, pa)
kvm_t *kd;
u_long va;
u_long *pa;
{
u_long end;
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if (va < (u_long) KERNBASE) {
_kvm_err(kd, 0, "invalid address (%lx<%lx)", va, (u_long) KERNBASE);
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return (0);
}
end = kd->vmst->end;
if (va >= end) {
_kvm_err(kd, 0, "invalid address (%lx>=%lx)", va, end);
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return (0);
}
*pa = (va - (u_long) KERNBASE);
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return (end - va);
}
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/*
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* Translate a physical address to a file-offset in the crash-dump.
* XXX - crash-dumps doesn't work anyway.
*/
off_t
_kvm_pa2off(kd, pa)
kvm_t *kd;
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u_long pa;
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{
return(kd->dump_off + pa);
}
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/*
* 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);
}