sys/compat/freebsd/freebsd_mod.c

   1 /*      $NetBSD: freebsd_mod.c,v 1.1 2008/11/19 18:36:02 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: freebsd_mod.c,v 1.1 2008/11/19 18:36:02 ad Exp $");
  34
  35 #ifdef _KERNEL_OPT
  36 #include "opt_execfmt.h"
  37 #endif
  38
  39 #include <sys/param.h>
  40 #include <sys/module.h>
  41 #include <sys/exec.h>
  42 #include <sys/exec_elf.h>
  43 #include <sys/exec_aout.h>
  44 #include <sys/signalvar.h>
  45
  46 #include <compat/freebsd/freebsd_exec.h>
  47 #include <compat/freebsd/freebsd_sysctl.h>
  48
  49 #if defined(EXEC_ELF32)
  50 # define        MD1     ",exec_elf32"
  51 #else
  52 # define        MD1     ""
  53 #endif
  54 #if defined(EXEC_AOUT)
  55 #  define       MD2     ",exec_aout"
  56 #else
  57 # define        MD2     ""
  58 #endif
  59
  60 #define ELF32_AUXSIZE (howmany(ELF_AUX_ENTRIES * sizeof(Aux32Info), \
  61     sizeof(Elf32_Addr)) + MAXPATHLEN + ALIGN(1))
  62
  63 MODULE(MODULE_CLASS_MISC, compat_freebsd, "compat,compat_ossaudio" MD1 MD2);
  64
  65 static struct execsw freebsd_execsw[] = {
  66 #ifdef EXEC_ELF32
  67         /* FreeBSD Elf32 (probe not 64-bit safe) */
  68         { sizeof (Elf32_Ehdr),
  69           exec_elf32_makecmds,
  70           { freebsd_elf32_probe },
  71           &emul_freebsd,
  72           EXECSW_PRIO_ANY,
  73           ELF32_AUXSIZE,
  74           elf32_copyargs,
  75           NULL,
  76           coredump_elf32,
  77           exec_setup_stack },
  78 #endif
  79 #ifdef EXEC_AOUT
  80         /* FreeBSD a.out (native word size) */
  81         { FREEBSD_AOUT_HDR_SIZE,
  82           exec_freebsd_aout_makecmds,
  83           { NULL },
  84           &emul_freebsd,
  85           EXECSW_PRIO_ANY,
  86           0,
  87           copyargs,
  88           NULL,
  89           coredump_netbsd,
  90           exec_setup_stack },
  91 #endif
  92 };
  93
  94 static int
  95 compat_freebsd_modcmd(modcmd_t cmd, void *arg)
  96 {
  97         int error;
  98
  99         switch (cmd) {
 100         case MODULE_CMD_INIT:
 101                 freebsd_sysctl_init();
 102                 error = exec_add(freebsd_execsw,
 103                     __arraycount(freebsd_execsw));
 104                 if (error != 0)
 105                         freebsd_sysctl_fini();
 106                 return error;
 107
 108         case MODULE_CMD_FINI:
 109                 error = exec_remove(freebsd_execsw,
 110                     __arraycount(freebsd_execsw));
 111                 if (error == 0)
 112                         freebsd_sysctl_fini();
 113                 return error;
 114
 115         default:
 116                 return ENOTTY;
 117         }
 118 }