kvm_i386.c revision 1603 
1/*-
2 * Copyright (c) 1989, 1992, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * This code is derived from software developed by the Computer Systems
6 * Engineering group at Lawrence Berkeley Laboratory under DARPA contract
7 * BG 91-66 and contributed to Berkeley.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 *    must display the following acknowledgement:
19 *	This product includes software developed by the University of
20 *	California, Berkeley and its contributors.
21 * 4. Neither the name of the University nor the names of its contributors
22 *    may be used to endorse or promote products derived from this software
23 *    without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 */
37
38#if defined(LIBC_SCCS) && !defined(lint)
39static char sccsid[] = "@(#)kvm_hp300.c	8.1 (Berkeley) 6/4/93";
40#endif /* LIBC_SCCS and not lint */
41
42/*
43 * i386 machine dependent routines for kvm.  Hopefully, the forthcoming
44 * vm code will one day obsolete this module.
45 */
46
47#include <sys/param.h>
48#include <sys/user.h>
49#include <sys/proc.h>
50#include <sys/stat.h>
51#include <unistd.h>
52#include <nlist.h>
53#include <kvm.h>
54
55#include <vm/vm.h>
56#include <vm/vm_param.h>
57
58#include <limits.h>
59#include <db.h>
60
61#include "kvm_private.h"
62
63#ifndef btop
64#define	btop(x)		(i386_btop(x))
65#define	ptob(x)		(i386_ptob(x))
66#endif
67
68struct vmstate {
69	struct pde	**IdlePTD;
70	struct pde	*PTD;
71};
72
73#define KREAD(kd, addr, p)\
74	(kvm_read(kd, addr, (char *)(p), sizeof(*(p))) != sizeof(*(p)))
75
76void
77_kvm_freevtop(kvm_t *kd) {
78	if (kd->vmst->PTD) {
79		free(kd->vmst->PTD);
80	}
81	if (kd->vmst != 0) {
82		free(kd->vmst);
83	}
84}
85
86int
87_kvm_initvtop(kvm_t *kd) {
88	struct vmstate *vm;
89	struct nlist nlist[2];
90
91	vm = (struct vmstate *)_kvm_malloc(kd, sizeof(*vm));
92	if (vm == 0) {
93		_kvm_err(kd, kd->program, "cannot allocate vm");
94		return (-1);
95	}
96	kd->vmst = vm;
97
98	nlist[0].n_name = "_IdlePTD";
99	nlist[1].n_name = 0;
100
101	if (kvm_nlist(kd, nlist) != 0) {
102		_kvm_err(kd, kd->program, "bad namelist");
103		return (-1);
104	}
105	vm->IdlePTD = 0;
106	if (KREAD(kd, (u_long)nlist[0].n_value, &vm->IdlePTD)) {
107		_kvm_err(kd, kd->program, "cannot read IdlePTD");
108		return (-1);
109	}
110	if ((vm->PTD = _kvm_malloc(kd, NBPG /*sizeof(struct pde)*/)) != 0) {
111		_kvm_err(kd, kd->program, "cannot allocate vm->PTD");
112	}
113	if (KREAD(kd, (u_long)nlist[1].n_value, &vm->PTD)) {
114		_kvm_err(kd, kd->program, "cannot read PTD");
115		return (-1);
116	}
117	return (0);
118}
119
120static int
121_kvm_vatop(kvm_t *kd, u_long va, u_long *pa) {
122
123	if (ISALIVE(kd)) {
124		_kvm_err(kd, 0, "vatop called in live kernel!");
125		return((off_t)0);
126	}
127	_kvm_err(kd, 0, "invalid address (%x)", va);
128	return ((off_t)0);
129}
130
131int
132_kvm_kvatop(kvm_t *kd, u_long va, u_long *pa) {
133	return (_kvm_vatop(kd, va, pa));
134}
135
136/*
137 * Translate a user virtual address to a physical address.
138 */
139int
140_kvm_uvatop(kvm_t *kd, const struct proc *p, u_long va, u_long *pa) {
141	if (ISALIVE(kd)) {
142		/* Not done yet */
143	} else {
144		/* Not done yet */
145	}
146	return ((off_t)(0));
147}
148