kvm_mips.c revision 214904 
1/*-
2 * Copyright (C) 2006 Bruce M. Simpson.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by Bruce M. Simpson.
16 * 4. The name of Bruce M. Simpson may not be used to endorse or promote products
17 *    derived from this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY BRUCE M. SIMPSON ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL BRUCE M. SIMPSON BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
24 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
25 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
26 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
27 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
28 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31/*
32 * MIPS machine dependent routines for kvm.
33 */
34
35#include <sys/cdefs.h>
36__FBSDID("$FreeBSD: head/lib/libkvm/kvm_mips.c 214904 2010-11-07 03:26:22Z gonzo $");
37
38#include <sys/param.h>
39#include <sys/elf32.h>
40#include <sys/mman.h>
41
42#include <vm/vm.h>
43#include <vm/vm_param.h>
44#include <vm/pmap.h>
45
46#include <machine/pmap.h>
47
48#include <db.h>
49#include <limits.h>
50#include <kvm.h>
51#include <stdlib.h>
52#include <string.h>
53#include <unistd.h>
54
55#include "kvm_private.h"
56
57/* minidump must be the first item! */
58struct vmstate {
59	int minidump;		/* 1 = minidump mode */
60	void *mmapbase;
61	size_t mmapsize;
62};
63
64void
65_kvm_freevtop(kvm_t *kd)
66{
67	if (kd->vmst != 0) {
68		if (kd->vmst->minidump)
69			return (_kvm_minidump_freevtop(kd));
70		if (kd->vmst->mmapbase != NULL)
71			munmap(kd->vmst->mmapbase, kd->vmst->mmapsize);
72		free(kd->vmst);
73		kd->vmst = NULL;
74	}
75}
76
77int
78_kvm_initvtop(kvm_t *kd)
79{
80	char minihdr[8];
81
82	if (!kd->rawdump) {
83		if (pread(kd->pmfd, &minihdr, 8, 0) == 8) {
84			if (memcmp(&minihdr, "minidump", 8) == 0)
85				return (_kvm_minidump_initvtop(kd));
86		} else {
87			_kvm_err(kd, kd->program, "cannot read header");
88			return (-1);
89		}
90	}
91
92	_kvm_err(kd, 0, "_kvm_initvtop: Unsupported image type");
93	return (-1);
94}
95
96int
97_kvm_kvatop(kvm_t *kd, u_long va , off_t *pa)
98{
99
100	u_long offset = va & (PAGE_SIZE - 1);
101	struct vmstate *vm = kd->vmst;
102
103	if (kd->vmst->minidump)
104		return _kvm_minidump_kvatop(kd, va, pa);
105
106
107	_kvm_err(kd, 0, "_kvm_kvatop: Unsupported image type");
108	return (0);
109}
110
111/*
112 * Machine-dependent initialization for ALL open kvm descriptors,
113 * not just those for a kernel crash dump.  Some architectures
114 * have to deal with these NOT being constants!  (i.e. m68k)
115 */
116int
117_kvm_mdopen(kvm_t *kd __unused)
118{
119
120	return (0);
121}
122