sys/compat/linux/common/linux_mod.c

   1 /*      $NetBSD$        */
   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, "$NetBSD$");
  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/linux/common/linux_sysctl.h>
  49 #include <compat/linux/common/linux_exec.h>
  50
  51 #if defined(EXEC_ELF32) && ELFSIZE == 32
  52 # define        MD1     ",exec_elf32"
  53 #else
  54 # define        MD1     ""
  55 #endif
  56 #if defined(EXEC_ELF64)
  57 # define        MD2     ",exec_elf64"
  58 #else
  59 # define        MD2     ""
  60 #endif
  61 #if defined(EXEC_AOUT)
  62 #  define       MD3     ",exec_aout"
  63 #else
  64 # define        MD3     ""
  65 #endif
  66
  67 MODULE(MODULE_CLASS_MISC, compat_linux, "compat,compat_ossaudio" MD1 MD2 MD3);
  68
  69 static struct execsw linux_execsw[] = {
  70 #if defined(EXEC_ELF32) && ELFSIZE == 32
  71         { sizeof (Elf32_Ehdr),
  72           exec_elf32_makecmds,
  73           { linux_elf32_probe },
  74           &emul_linux,
  75           EXECSW_PRIO_ANY,
  76           LINUX_ELF_AUX_ARGSIZ,
  77           linux_elf32_copyargs,
  78           NULL,
  79           coredump_elf32,
  80           linux_exec_setup_stack },
  81 #elif defined(EXEC_ELF64)
  82         { sizeof (Elf64_Ehdr),
  83           exec_elf64_makecmds,
  84           { linux_elf64_probe },
  85           &emul_linux,
  86           EXECSW_PRIO_ANY,
  87           LINUX_ELF_AUX_ARGSIZ,
  88           linux_elf64_copyargs,
  89           NULL,
  90           coredump_elf64,
  91           linux_exec_setup_stack },
  92 #endif
  93 #ifdef EXEC_AOUT
  94         { LINUX_AOUT_HDR_SIZE,
  95           exec_linux_aout_makecmds,
  96           { NULL },
  97           &emul_linux,
  98           EXECSW_PRIO_LAST,
  99           LINUX_AOUT_AUX_ARGSIZ,
 100           linux_aout_copyargs,
 101           NULL,
 102           coredump_netbsd,
 103           linux_exec_setup_stack },
 104 #endif
 105 };
 106
 107 static int
 108 compat_linux_modcmd(modcmd_t cmd, void *arg)
 109 {
 110         int error;
 111
 112         switch (cmd) {
 113         case MODULE_CMD_INIT:
 114                 linux_sysctl_init();
 115                 error = exec_add(linux_execsw,
 116                     __arraycount(linux_execsw));
 117                 if (error != 0)
 118                         linux_sysctl_fini();
 119                 return error;
 120
 121         case MODULE_CMD_FINI:
 122                 error = exec_remove(linux_execsw,
 123                     __arraycount(linux_execsw));
 124                 if (error == 0)
 125                         linux_sysctl_fini();
 126                 return error;
 127
 128         default:
 129                 return ENOTTY;
 130         }
 131 }