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("$FreeBSD$"); 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/sx.h> 39 #include <sys/sysctl.h> 40 41 #include <compat/linux/linux.h> 42 #include <compat/linux/linux_emul.h> 43 #include <compat/linux/linux_ioctl.h> 44 #include <compat/linux/linux_mib.h> 45 #include <compat/linux/linux_util.h> 46 47 FEATURE(linuxulator_v4l, "V4L ioctl wrapper support in the linuxulator"); 48 FEATURE(linuxulator_v4l2, "V4L2 ioctl wrapper support in the linuxulator"); 49 50 MODULE_VERSION(linux_common, 1); 51 52 SET_DECLARE(linux_device_handler_set, struct linux_device_handler); 53 54 TAILQ_HEAD(, linux_ioctl_handler_element) linux_ioctl_handlers = 55 TAILQ_HEAD_INITIALIZER(linux_ioctl_handlers); 56 struct sx linux_ioctl_sx; 57 SX_SYSINIT(linux_ioctl, &linux_ioctl_sx, "Linux ioctl handlers"); 58 59 static eventhandler_tag linux_exec_tag; 60 static eventhandler_tag linux_thread_dtor_tag; 61 static eventhandler_tag linux_exit_tag; 62 63 static int 64 linux_common_modevent(module_t mod, int type, void *data) 65 { 66 struct linux_device_handler **ldhp; 67 68 switch(type) { 69 case MOD_LOAD: 70 #ifdef INVARIANTS 71 linux_check_errtbl(); 72 #endif 73 linux_dev_shm_create(); 74 linux_osd_jail_register(); 75 linux_exit_tag = EVENTHANDLER_REGISTER(process_exit, 76 linux_proc_exit, NULL, 1000); 77 linux_exec_tag = EVENTHANDLER_REGISTER(process_exec, 78 linux_proc_exec, NULL, 1000); 79 linux_thread_dtor_tag = EVENTHANDLER_REGISTER(thread_dtor, 80 linux_thread_dtor, NULL, EVENTHANDLER_PRI_ANY); 81 SET_FOREACH(ldhp, linux_device_handler_set) 82 linux_device_register_handler(*ldhp); 83 LIST_INIT(&futex_list); 84 mtx_init(&futex_mtx, "ftllk", NULL, MTX_DEF); 85 break; 86 case MOD_UNLOAD: 87 linux_dev_shm_destroy(); 88 linux_osd_jail_deregister(); 89 SET_FOREACH(ldhp, linux_device_handler_set) 90 linux_device_unregister_handler(*ldhp); 91 mtx_destroy(&futex_mtx); 92 EVENTHANDLER_DEREGISTER(process_exit, linux_exit_tag); 93 EVENTHANDLER_DEREGISTER(process_exec, linux_exec_tag); 94 EVENTHANDLER_DEREGISTER(thread_dtor, linux_thread_dtor_tag); 95 break; 96 default: 97 return (EOPNOTSUPP); 98 } 99 return (0); 100 } 101 102 static moduledata_t linux_common_mod = { 103 "linuxcommon", 104 linux_common_modevent, 105 0 106 }; 107 108 DECLARE_MODULE(linuxcommon, linux_common_mod, SI_SUB_EXEC, SI_ORDER_ANY); 109 MODULE_VERSION(linuxcommon, 1); 110