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 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 /*
28 * MIPS machine dependent routines for kvm.
29 */
30
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
33
34 #include <sys/param.h>
35 #include <sys/elf32.h>
36 #include <sys/mman.h>
37
38 #include <vm/vm.h>
39 #include <vm/vm_param.h>
40 #include <vm/pmap.h>
41
42 #include <machine/pmap.h>
43
44 #include <db.h>
45 #include <limits.h>
46 #include <kvm.h>
47 #include <stdlib.h>
48 #include <string.h>
49 #include <unistd.h>
50
51 #include "kvm_private.h"
52
53 /* minidump must be the first item! */
54 struct vmstate {
55 int minidump; /* 1 = minidump mode */
56 void *mmapbase;
57 size_t mmapsize;
58 };
59
60 void
_kvm_freevtop(kvm_t * kd)61 _kvm_freevtop(kvm_t *kd)
62 {
63 if (kd->vmst != 0) {
64 if (kd->vmst->minidump)
65 return (_kvm_minidump_freevtop(kd));
66 if (kd->vmst->mmapbase != NULL)
67 munmap(kd->vmst->mmapbase, kd->vmst->mmapsize);
68 free(kd->vmst);
69 kd->vmst = NULL;
70 }
71 }
72
73 int
_kvm_initvtop(kvm_t * kd)74 _kvm_initvtop(kvm_t *kd)
75 {
76 char minihdr[8];
77
78 if (!kd->rawdump) {
79 if (pread(kd->pmfd, &minihdr, 8, 0) == 8) {
80 if (memcmp(&minihdr, "minidump", 8) == 0)
81 return (_kvm_minidump_initvtop(kd));
82 } else {
83 _kvm_err(kd, kd->program, "cannot read header");
84 return (-1);
85 }
86 }
87
88 _kvm_err(kd, 0, "_kvm_initvtop: Unsupported image type");
89 return (-1);
90 }
91
92 int
_kvm_kvatop(kvm_t * kd,u_long va,off_t * pa)93 _kvm_kvatop(kvm_t *kd, u_long va, off_t *pa)
94 {
95
96 if (kd->vmst->minidump)
97 return _kvm_minidump_kvatop(kd, va, pa);
98
99
100 _kvm_err(kd, 0, "_kvm_kvatop: Unsupported image type");
101 return (0);
102 }
103
104 /*
105 * Machine-dependent initialization for ALL open kvm descriptors,
106 * not just those for a kernel crash dump. Some architectures
107 * have to deal with these NOT being constants! (i.e. m68k)
108 */
109 #ifdef FBSD_NOT_YET
110 int
_kvm_mdopen(kvm_t * kd __unused)111 _kvm_mdopen(kvm_t *kd __unused)
112 {
113
114 return (0);
115 }
116 #endif
117