mirror of
https://github.com/freebsd/freebsd-src
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de2a1afc47
some (hopefully) less offensive stupidity: If we detect that a user has loaded a module that fails to initialize itself correctly, panic. There really isn't a safe way to recover from something like this; we can't know that the module is bad until after the entry point is called, by which time it's too late to do anything about it.
178 lines
4.1 KiB
C
178 lines
4.1 KiB
C
/*
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* Copyright (c) 1993 Terrence R. Lambert.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Terrence R. Lambert.
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* 4. The name Terrence R. Lambert may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY TERRENCE R. LAMBERT ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE TERRENCE R. LAMBERT BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: modstat.c,v 1.2 1995/04/18 02:19:17 wpaul Exp $
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <err.h>
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#include <string.h>
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#include <a.out.h>
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#include <sys/param.h>
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#include <sys/ioctl.h>
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#include <sys/conf.h>
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#include <sys/mount.h>
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#include <sys/lkm.h>
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#include <sys/file.h>
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#include <sys/errno.h>
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#include "pathnames.h"
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void
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usage()
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{
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fprintf(stderr, "usage:\n");
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fprintf(stderr, "modstat [-i <module id>] [-n <module name>]\n");
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exit(1);
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}
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static char *type_names[] = {
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"SYSCALL",
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"VFS",
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"DEV",
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"STRMOD",
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"EXEC",
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"MISC"
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};
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int
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dostat(devfd, modnum, modname)
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int devfd;
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int modnum;
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char *modname;
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{
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struct lmc_stat sbuf;
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if (modname != NULL)
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strcpy(sbuf.name, modname);
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sbuf.id = modnum;
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if (ioctl(devfd, LMSTAT, &sbuf) == -1) {
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switch (errno) {
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case EINVAL: /* out of range */
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return 2;
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case ENOENT: /* no such entry */
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return 1;
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default: /* other error (EFAULT, etc) */
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warn("LMSTAT");
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return 4;
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}
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}
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/*
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* Decode this stat buffer...
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*/
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printf("%-7s %3d %3d %08x %04x %8x %3d %s\n",
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type_names[sbuf.type],
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sbuf.id, /* module id */
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sbuf.offset, /* offset into modtype struct */
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sbuf.area, /* address module loaded at */
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sbuf.size, /* size in pages(K) */
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sbuf.private, /* kernel address of private area */
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sbuf.ver, /* Version; always 1 for now */
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sbuf.name /* name from private area */
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);
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/*
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* Done (success).
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*/
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return 0;
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}
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int devfd;
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void
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cleanup()
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{
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close(devfd);
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}
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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int c;
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int modnum = -1;
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char *modname = NULL;
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while ((c = getopt(argc, argv, "i:n:")) != EOF) {
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switch (c) {
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case 'i':
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modnum = atoi(optarg);
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break; /* number */
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case 'n':
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modname = optarg;
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break; /* name */
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case '?':
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usage();
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default:
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printf("default!\n");
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break;
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}
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}
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argc -= optind;
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argv += optind;
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if (argc != 0)
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usage();
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/*
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* Open the virtual device device driver for exclusive use (needed
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* to ioctl() to retrive the loaded module(s) status).
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*/
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if ((devfd = open(_PATH_LKM, O_RDONLY, 0)) == -1)
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err(2, _PATH_LKM);
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atexit(cleanup);
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printf("Type Id Off Loadaddr Size Info Rev Module Name\n");
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/*
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* Oneshot?
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*/
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if (modnum != -1 || modname != NULL) {
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if (dostat(devfd, modnum, modname))
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exit(3);
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exit(0);
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}
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/*
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* Start at 0 and work up until "EINVAL".
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*/
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for (modnum = 0; dostat(devfd, modnum, NULL) < 2; modnum++)
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;
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exit(0);
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}
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