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      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
     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
     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