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linux_mod.c revision 1.1.12.2 
      1 /*	$NetBSD: linux_mod.c,v 1.1.12.2 2009/05/04 08:12:22 yamt 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: linux_mod.c,v 1.1.12.2 2009/05/04 08:12:22 yamt 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/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 }
    132