1 /* $NetBSD: fetch.c,v 1.13 2009/04/13 23:20:27 lukem Exp $ */
2
3 /*-
4 * Copyright (c) 1980, 1992, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 #ifndef lint
34 #if 0
35 static char sccsid[] = "@(#)fetch.c 8.1 (Berkeley) 6/6/93";
36 #endif
37 __RCSID("$NetBSD: fetch.c,v 1.13 2009/04/13 23:20:27 lukem Exp $");
38 #endif /* not lint */
39
40 #include <sys/param.h>
41 #include <sys/sched.h>
42 #include <sys/sysctl.h>
43
44 #include <string.h>
45 #include <errno.h>
46
47 #include "systat.h"
48 #include "extern.h"
49
50 ssize_t
kvm_ckread(const void * a,void * b,size_t l,const char * name)51 kvm_ckread(const void *a, void *b, size_t l, const char *name)
52 {
53 if ((size_t)kvm_read(kd, (u_long)a, b, l) != l) {
54 if (verbose)
55 error("error reading kmem for %s at %p (%s)\n", name,
56 a, strerror(errno));
57 return (0);
58 } else
59 return (1);
60 }
61
62 int
fetch_cptime(u_int64_t * cptime)63 fetch_cptime(u_int64_t *cptime)
64 {
65 size_t ssize;
66 int mib[2];
67
68 /*
69 * XXX Need to locate the `correct' CPU when looking for this
70 * XXX in crash dumps. Just don't report it for now, in that
71 * XXX case.
72 */
73 ssize = CPUSTATES * sizeof(u_int64_t);
74 memset(cptime, 0, ssize);
75 if (memf == NULL) {
76 mib[0] = CTL_KERN;
77 mib[1] = KERN_CP_TIME;
78 if (sysctl(mib, 2, cptime, &ssize, NULL, 0) < 0) {
79 if (verbose)
80 error("error fetching cp_time\n");
81 return (0);
82 } else
83 return (1);
84 }
85 return (1);
86 }
87