sys/compat/linux32/common/linux32_mod.c

   1 /*      $NetBSD: linux32_mod.c,v 1.1 2008/11/19 18:36:04 ad Exp $       */
   2
   3 /*-
   4  * Copyright (c) 2008 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software developed for The NetBSD Foundation
   8  * by Andrew Doran.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 __KERNEL_RCSID(0, "$NetBSD: linux32_mod.c,v 1.1 2008/11/19 18:36:04 ad Exp $");
  34
  35 #ifdef _KERNEL_OPT
  36 #include "opt_execfmt.h"
  37 #endif
  38
  39 #ifndef ELFSIZE
  40 #define ELFSIZE ARCH_ELFSIZE
  41 #endif
  42
  43 #include <sys/param.h>
  44 #include <sys/module.h>
  45 #include <sys/exec.h>
  46 #include <sys/signalvar.h>
  47
  48 #include <compat/linux32/common/linux32_sysctl.h>
  49 #include <compat/linux32/common/linux32_exec.h>
  50
  51 #if defined(EXEC_ELF32)
  52 # define        MD1     ",exec_elf32,compat_netbsd32"
  53 #else
  54 # define        MD1     ""
  55 #endif
  56
  57 MODULE(MODULE_CLASS_MISC, compat_linux32, "compat_linux" MD1);
  58
  59 static struct execsw linux32_execsw[] = {
  60 #if defined(EXEC_ELF32)
  61         { sizeof (Elf32_Ehdr),
  62           exec_elf32_makecmds,
  63           { linux32_elf32_probe },
  64           &emul_linux32,
  65           EXECSW_PRIO_FIRST,
  66           LINUX32_ELF_AUX_ARGSIZ,
  67           linux32_elf32_copyargs,
  68           NULL,
  69           coredump_elf32,
  70           exec_setup_stack },
  71 #endif
  72 };
  73
  74 static int
  75 compat_linux32_modcmd(modcmd_t cmd, void *arg)
  76 {
  77         int error;
  78
  79         switch (cmd) {
  80         case MODULE_CMD_INIT:
  81                 linux32_sysctl_init();
  82                 error = exec_add(linux32_execsw,
  83                     __arraycount(linux32_execsw));
  84                 if (error != 0)
  85                         linux32_sysctl_fini();
  86                 return error;
  87
  88         case MODULE_CMD_FINI:
  89                 error = exec_remove(linux32_execsw,
  90                     __arraycount(linux32_execsw));
  91                 if (error == 0)
  92                         linux32_sysctl_fini();
  93                 return error;
  94
  95         default:
  96                 return ENOTTY;
  97         }
  98 }