linux_common.c

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

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FreeBSD/Linux Kernel Cross Reference sys/compat/linux/linux_common.c

FreeBSD/Linux Kernel Cross Reference
sys/compat/linux/linux_common.c