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netbsd32_mod.c revision 1.1.4.2 
      1 /*	$NetBSD: netbsd32_mod.c,v 1.1.4.2 2008/12/13 01:14:03 haad 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: netbsd32_mod.c,v 1.1.4.2 2008/12/13 01:14:03 haad Exp $");
     34 
     35 #ifdef _KERNEL_OPT
     36 #include "opt_execfmt.h"
     37 #define	MODDEPS	"compat"
     38 #else
     39 #define	MODDEPS	"compat,ksem"
     40 #endif
     41 
     42 #ifndef ELFSIZE
     43 #define ELFSIZE ARCH_ELFSIZE
     44 #endif
     45 
     46 #include <sys/param.h>
     47 #include <sys/module.h>
     48 #include <sys/exec.h>
     49 #include <sys/exec_elf.h>
     50 
     51 #include <compat/netbsd32/netbsd32_sysctl.h>
     52 #include <compat/netbsd32/netbsd32_exec.h>
     53 
     54 #define ELF32_AUXSIZE (howmany(ELF_AUX_ENTRIES * sizeof(Aux32Info), \
     55     sizeof(Elf32_Addr)) + MAXPATHLEN + ALIGN(1))
     56 
     57 MODULE(MODULE_CLASS_MISC, compat_netbsd32, MODDEPS);
     58 
     59 static struct execsw netbsd32_execsw[] = {
     60 #ifdef EXEC_AOUT
     61 	{ sizeof(struct netbsd32_exec),
     62 	  exec_netbsd32_makecmds,
     63 	  { NULL },
     64 	  &emul_netbsd32,
     65 	  EXECSW_PRIO_FIRST,
     66 	  0,
     67 	  netbsd32_copyargs,
     68 	  NULL,
     69 	  coredump_netbsd32,
     70 	  exec_setup_stack },
     71 #endif
     72 #ifdef EXEC_ELF32
     73 	{ sizeof (Elf32_Ehdr),
     74 	  exec_elf32_makecmds,
     75 	  { netbsd32_elf32_probe },
     76 	  &emul_netbsd32,
     77 	  EXECSW_PRIO_FIRST,
     78 	  ELF32_AUXSIZE,
     79 	  netbsd32_elf32_copyargs,
     80 	  NULL,
     81 	  coredump_elf32,
     82 	  exec_setup_stack },		/* XXX XXX XXX */
     83 #endif
     84 };
     85 
     86 static int
     87 compat_netbsd32_modcmd(modcmd_t cmd, void *arg)
     88 {
     89 	int error;
     90 
     91 	switch (cmd) {
     92 	case MODULE_CMD_INIT:
     93 		netbsd32_sysctl_init();
     94 		error = exec_add(netbsd32_execsw,
     95 		    __arraycount(netbsd32_execsw));
     96 		if (error != 0)
     97 			netbsd32_sysctl_fini();
     98 		return error;
     99 
    100 	case MODULE_CMD_FINI:
    101 		error = exec_remove(netbsd32_execsw,
    102 		    __arraycount(netbsd32_execsw));
    103 		if (error == 0)
    104 			netbsd32_sysctl_fini();
    105 		return error;
    106 
    107 	default:
    108 		return ENOTTY;
    109 	}
    110 }
    111