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: releng/10.4/sys/compat/linux/linux_common.c 293529 2016-01-09 16:12:37Z 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
44 FEATURE(linuxulator_v4l, "V4L ioctl wrapper support in the linuxulator");
45 FEATURE(linuxulator_v4l2, "V4L2 ioctl wrapper support in the linuxulator");
46
47 MODULE_VERSION(linux_common, 1);
48
49 SET_DECLARE(linux_device_handler_set, struct linux_device_handler);
50
51 static eventhandler_tag linux_exec_tag;
52 static eventhandler_tag linux_thread_dtor_tag;
53 static eventhandler_tag linux_exit_tag;
54
55
56 static int
57 linux_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
87 static moduledata_t linux_common_mod = {
88 "linuxcommon",
89 linux_common_modevent,
90 0
91 };
92
93 DECLARE_MODULE(linuxcommon, linux_common_mod, SI_SUB_EXEC, SI_ORDER_ANY);
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