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linux32_mod.c revision 1.3 
      1 /*	$NetBSD: linux32_mod.c,v 1.3 2010/07/07 01:30:35 chs 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 1.3 2010/07/07 01:30:35 chs 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_exec.h>
     49 
     50 #include <compat/linux32/common/linux32_sysctl.h>
     51 #include <compat/linux32/common/linux32_exec.h>
     52 
     53 #if defined(EXEC_ELF32)
     54 # define	MD1	",exec_elf32,compat_netbsd32"
     55 #else
     56 # define	MD1	""
     57 #endif
     58 
     59 MODULE(MODULE_CLASS_MISC, compat_linux32, "compat_linux" MD1);
     60 
     61 static struct execsw linux32_execsw[] = {
     62 #if defined(EXEC_ELF32)
     63         { sizeof (Elf32_Ehdr),
     64           exec_elf32_makecmds,
     65           { linux32_elf32_probe },
     66           &emul_linux32,
     67           EXECSW_PRIO_FIRST,
     68 	  LINUX32_ELF_AUX_ARGSIZ,
     69           linux32_elf32_copyargs,
     70           NULL,
     71           coredump_elf32,
     72           linux_exec_setup_stack },
     73 #endif
     74 };
     75 
     76 static int
     77 compat_linux32_modcmd(modcmd_t cmd, void *arg)
     78 {
     79 	int error;
     80 
     81 	switch (cmd) {
     82 	case MODULE_CMD_INIT:
     83 		linux32_sysctl_init();
     84 		error = exec_add(linux32_execsw,
     85 		    __arraycount(linux32_execsw));
     86 		if (error != 0)
     87 			linux32_sysctl_fini();
     88 		return error;
     89 
     90 	case MODULE_CMD_FINI:
     91 		error = exec_remove(linux32_execsw,
     92 		    __arraycount(linux32_execsw));
     93 		if (error == 0)
     94 			linux32_sysctl_fini();
     95 		return error;
     96 
     97 	default:
     98 		return ENOTTY;
     99 	}
    100 }
    101