/*      $NetBSD: fetch.c,v 1.13 2009/04/13 23:20:27 lukem Exp $ */

/*-
* Copyright (c) 1980, 1992, 1993
*      The Regents of the University of California.  All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/

#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)fetch.c     8.1 (Berkeley) 6/6/93";
#endif
__RCSID("$NetBSD: fetch.c,v 1.13 2009/04/13 23:20:27 lukem Exp $");
#endif /* not lint */

#include <sys/param.h>
#include <sys/sched.h>
#include <sys/sysctl.h>

#include <string.h>
#include <errno.h>

#include "systat.h"
#include "extern.h"

ssize_t
kvm_ckread(const void *a, void *b, size_t l, const char *name)
{
       if ((size_t)kvm_read(kd, (u_long)a, b, l) != l) {
               if (verbose)
                       error("error reading kmem for %s at %p (%s)\n", name,
                           a, strerror(errno));
               return (0);
       } else
               return (1);
}

int
fetch_cptime(u_int64_t *cptime)
{
       size_t ssize;
       int mib[2];

       /*
        * XXX Need to locate the `correct' CPU when looking for this
        * XXX in crash dumps.  Just don't report it for now, in that
        * XXX case.
        */
       ssize = CPUSTATES * sizeof(u_int64_t);
       memset(cptime, 0, ssize);
       if (memf == NULL) {
               mib[0] = CTL_KERN;
               mib[1] = KERN_CP_TIME;
               if (sysctl(mib, 2, cptime, &ssize, NULL, 0) < 0) {
                       if (verbose)
                               error("error fetching cp_time\n");
                       return (0);
               } else
                       return (1);
       }
       return (1);
}