1 /*-
2 * Copyright (c) 2002 Poul-Henning Kamp
3 * Copyright (c) 2002 Networks Associates Technology, Inc.
4 * All rights reserved.
5 *
6 * This software was developed for the FreeBSD Project by Poul-Henning Kamp
7 * and NAI Labs, the Security Research Division of Network Associates, Inc.
8 * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
9 * DARPA CHATS research program.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. The names of the authors may not be used to endorse or promote
20 * products derived from this software without specific prior written
21 * permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36 #include <sys/cdefs.h>
37 __FBSDID("$FreeBSD: releng/5.3/sys/amd64/amd64/dump_machdep.c 118031 2003-07-25 21:19:19Z obrien $");
38
39 #include <sys/param.h>
40 #include <sys/systm.h>
41 #include <sys/conf.h>
42 #include <sys/cons.h>
43 #include <sys/kernel.h>
44 #include <sys/kerneldump.h>
45 #include <vm/vm.h>
46 #include <vm/pmap.h>
47 #include <machine/md_var.h>
48
49 CTASSERT(sizeof(struct kerneldumpheader) == 512);
50
51 static struct kerneldumpheader kdh;
52
53 void
54 dumpsys(struct dumperinfo *di)
55 {
56 off_t dumplo;
57 vm_offset_t a, addr;
58 u_int count, left, u;
59 void *va;
60 int i, mb;
61 int c;
62
63 printf("Dumping %ld MB\n", Maxmem / (1024*1024 / PAGE_SIZE));
64
65 /* Fill in the kernel dump header */
66 strcpy(kdh.magic, KERNELDUMPMAGIC);
67 strcpy(kdh.architecture, "amd64");
68 kdh.version = htod32(KERNELDUMPVERSION);
69 kdh.architectureversion = htod32(KERNELDUMP_I386_VERSION);
70 kdh.dumplength = htod64(Maxmem * (off_t)PAGE_SIZE);
71 kdh.dumptime = htod64(time_second);
72 kdh.blocksize = htod32(di->blocksize);
73 strncpy(kdh.hostname, hostname, sizeof kdh.hostname);
74 strncpy(kdh.versionstring, version, sizeof kdh.versionstring);
75 if (panicstr != NULL)
76 strncpy(kdh.panicstring, panicstr, sizeof kdh.panicstring);
77 kdh.parity = kerneldump_parity(&kdh);
78
79 /*
80 * Check if we will have enough room to save the coredump.
81 * The partition size needed is the sum of:
82 * Memory to save + header + trailer + Room to leave untouched
83 * at partition head. (an arbitrary amount).
84 */
85 if (di->mediasize <
86 Maxmem * (off_t)PAGE_SIZE + sizeof kdh * 2 + 64*1024) {
87 printf("\nDump failed. Partition too small.\n");
88 return;
89 }
90 dumplo = di->mediaoffset + di->mediasize - Maxmem * (off_t)PAGE_SIZE;
91 dumplo -= sizeof kdh * 2;
92 i = di->dumper(di->priv, &kdh, 0, dumplo, sizeof kdh);
93 if (i)
94 printf("\nDump failed writing header (%d)\n", i);
95 dumplo += sizeof kdh;
96 i = 0;
97 addr = 0;
98 va = 0;
99 mb = 0;
100 for (count = 0; count < Maxmem;) {
101 left = Maxmem - count;
102 if (left > MAXDUMPPGS)
103 left = MAXDUMPPGS;
104 for (u = 0; u < left; u++) {
105 a = addr + u * PAGE_SIZE;
106 if (!is_physical_memory(a))
107 a = 0;
108 va = pmap_kenter_temporary(trunc_page(a), u);
109 }
110 i = count / (16*1024*1024 / PAGE_SIZE);
111 if (i != mb) {
112 printf(" %d", count / (1024 * 1024 / PAGE_SIZE));
113 mb = i;
114 }
115 i = di->dumper(di->priv, va, 0, dumplo, left * PAGE_SIZE);
116 if (i)
117 break;
118 count += left;
119 dumplo += left * PAGE_SIZE;
120 addr += left * PAGE_SIZE;
121 if ((c = cncheckc()) == 0x03) {
122 printf("\nDump aborted.\n");
123 return;
124 } else if (c != -1)
125 printf("[CTRL-C to abort] ");
126 }
127 if (i)
128 printf("\nDump failed writing data (%d)\n", i);
129 i = di->dumper(di->priv, &kdh, 0, dumplo, sizeof kdh);
130 if (i)
131 printf("\nDump failed writing trailer (%d)\n", i);
132 di->dumper(di->priv, NULL, 0, 0, 0); /* tell them we are done */
133 printf("\nDump complete\n");
134 return;
135 }
Cache object: 59e67e4170a45d449c996bb4fc3e6c9d
|