linux_common.c revision 302408 
1/*-
2 * Copyright (c) 2014 Vassilis Laganakos
3 * 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 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: stable/11/sys/compat/linux/linux_common.c 283423 2015-05-24 16:00:01Z dchagin $");
29
30#include <sys/param.h>
31#include <sys/systm.h>
32#include <sys/exec.h>
33#include <sys/imgact.h>
34#include <sys/imgact_elf.h>
35#include <sys/kernel.h>
36#include <sys/malloc.h>
37#include <sys/eventhandler.h>
38#include <sys/sysctl.h>
39
40#include <compat/linux/linux_emul.h>
41#include <compat/linux/linux_mib.h>
42#include <compat/linux/linux_util.h>
43
44FEATURE(linuxulator_v4l, "V4L ioctl wrapper support in the linuxulator");
45FEATURE(linuxulator_v4l2, "V4L2 ioctl wrapper support in the linuxulator");
46
47MODULE_VERSION(linux_common, 1);
48
49SET_DECLARE(linux_device_handler_set, struct linux_device_handler);
50
51static eventhandler_tag linux_exec_tag;
52static eventhandler_tag linux_thread_dtor_tag;
53static eventhandler_tag	linux_exit_tag;
54
55
56static int
57linux_common_modevent(module_t mod, int type, void *data)
58{
59	struct linux_device_handler **ldhp;
60
61	switch(type) {
62	case MOD_LOAD:
63		linux_osd_jail_register();
64		linux_exit_tag = EVENTHANDLER_REGISTER(process_exit,
65		    linux_proc_exit, NULL, 1000);
66		linux_exec_tag = EVENTHANDLER_REGISTER(process_exec,
67		    linux_proc_exec, NULL, 1000);
68		linux_thread_dtor_tag = EVENTHANDLER_REGISTER(thread_dtor,
69		    linux_thread_dtor, NULL, EVENTHANDLER_PRI_ANY);
70		SET_FOREACH(ldhp, linux_device_handler_set)
71			linux_device_register_handler(*ldhp);
72		break;
73	case MOD_UNLOAD:
74		linux_osd_jail_deregister();
75		SET_FOREACH(ldhp, linux_device_handler_set)
76			linux_device_unregister_handler(*ldhp);
77		EVENTHANDLER_DEREGISTER(process_exit, linux_exit_tag);
78		EVENTHANDLER_DEREGISTER(process_exec, linux_exec_tag);
79		EVENTHANDLER_DEREGISTER(thread_dtor, linux_thread_dtor_tag);
80		break;
81	default:
82		return (EOPNOTSUPP);
83	}
84	return (0);
85}
86
87static moduledata_t linux_common_mod = {
88	"linuxcommon",
89	linux_common_modevent,
90	0
91};
92
93DECLARE_MODULE(linuxcommon, linux_common_mod, SI_SUB_EXEC, SI_ORDER_ANY);
94