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nlist.c revision 1.10 
      1 /*-
      2  * Copyright (c) 1990, 1993, 1994
      3  *	The Regents of the University of California.  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  * 3. All advertising materials mentioning features or use of this software
     14  *    must display the following acknowledgement:
     15  *	This product includes software developed by the University of
     16  *	California, Berkeley and its contributors.
     17  * 4. Neither the name of the University nor the names of its contributors
     18  *    may be used to endorse or promote products derived from this software
     19  *    without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  * SUCH DAMAGE.
     32  */
     33 
     34 #ifndef lint
     35 static char sccsid[] = "@(#)nlist.c	8.4 (Berkeley) 4/2/94";
     36 #endif /* not lint */
     37 
     38 #include <sys/param.h>
     39 #include <sys/time.h>
     40 #include <sys/proc.h>
     41 #include <sys/resource.h>
     42 
     43 #include <err.h>
     44 #include <errno.h>
     45 #include <kvm.h>
     46 #include <nlist.h>
     47 #include <stdio.h>
     48 #include <string.h>
     49 #include <unistd.h>
     50 
     51 #include "ps.h"
     52 
     53 #ifdef P_PPWAIT
     54 #define NEWVM
     55 #endif
     56 
     57 struct	nlist psnl[] = {
     58 	{"_fscale"},
     59 #define	X_FSCALE	0
     60 	{"_ccpu"},
     61 #define	X_CCPU		1
     62 #ifdef NEWVM
     63 	{"_avail_start"},
     64 #define	X_AVAILSTART	2
     65 	{"_avail_end"},
     66 #define	X_AVAILEND	3
     67 #else
     68 	{"_ecmx"},
     69 #define	X_ECMX		2
     70 #endif
     71 	{NULL}
     72 };
     73 
     74 fixpt_t	ccpu;				/* kernel _ccpu variable */
     75 int	nlistread;			/* if nlist already read. */
     76 int	mempages;			/* number of pages of phys. memory */
     77 int	fscale;				/* kernel _fscale variable */
     78 
     79 extern kvm_t *kd;
     80 
     81 #define kread(x, v) \
     82 	kvm_read(kd, psnl[x].n_value, (char *)&v, sizeof v) != sizeof(v)
     83 
     84 int
     85 donlist()
     86 {
     87 	int rval;
     88 #ifdef NEWVM
     89 	int tmp;
     90 #endif
     91 
     92 	rval = 0;
     93 	nlistread = 1;
     94 	if (kvm_nlist(kd, psnl)) {
     95 		nlisterr(psnl);
     96 		eval = 1;
     97 		return (1);
     98 	}
     99 	if (kread(X_FSCALE, fscale)) {
    100 		warnx("fscale: %s", kvm_geterr(kd));
    101 		eval = rval = 1;
    102 	}
    103 #ifdef NEWVM
    104 	if (kread(X_AVAILEND, mempages)) {
    105 		warnx("avail_start: %s", kvm_geterr(kd));
    106 		eval = rval = 1;
    107 	}
    108 	if (kread(X_AVAILSTART, tmp)) {
    109 		warnx("avail_end: %s", kvm_geterr(kd));
    110 		eval = rval = 1;
    111 	}
    112 	mempages -= tmp;
    113 	mempages /= getpagesize();
    114 #else
    115 	if (kread(X_ECMX, mempages)) {
    116 		warnx("ecmx: %s", kvm_geterr(kd));
    117 		eval = rval = 1;
    118 	}
    119 #endif
    120 	if (kread(X_CCPU, ccpu)) {
    121 		warnx("ccpu: %s", kvm_geterr(kd));
    122 		eval = rval = 1;
    123 	}
    124 	return (rval);
    125 }
    126 
    127 void
    128 nlisterr(nl)
    129 	struct nlist nl[];
    130 {
    131 	int i;
    132 
    133 	(void)fprintf(stderr, "ps: nlist: can't find following symbols:");
    134 	for (i = 0; nl[i].n_name != NULL; i++)
    135 		if (nl[i].n_value == 0)
    136 			(void)fprintf(stderr, " %s", nl[i].n_name);
    137 	(void)fprintf(stderr, "\n");
    138 }
    139