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netbsd32_mod.c revision 1.5.2.2 
      1 /*	$NetBSD: netbsd32_mod.c,v 1.5.2.2 2015/11/17 19:18:19 riz 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 1.5.2.2 2015/11/17 19:18:19 riz Exp $");
     34 
     35 #ifdef _KERNEL_OPT
     36 #include "opt_execfmt.h"
     37 # define	DEPS1	"compat"
     38 #else
     39 # define	DEPS1	"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 #if defined(EXEC_ELF32)
     55 # define	DEPS2	",exec_elf32"
     56 #else
     57 # define	DEPS2	""
     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_EXEC, compat_netbsd32, DEPS1 DEPS2);
     64 
     65 static struct execsw netbsd32_execsw[] = {
     66 #ifdef EXEC_AOUT
     67 	{
     68 		.es_hdrsz = sizeof(struct netbsd32_exec),
     69 		.es_makecmds = exec_netbsd32_makecmds,
     70 		.u = {
     71 			.elf_probe_func = NULL,
     72 		},
     73 		.es_emul = &emul_netbsd32,
     74 		.es_prio = EXECSW_PRIO_FIRST,
     75 		.es_arglen = 0,
     76 		.es_copyargs = netbsd32_copyargs,
     77 		.es_setregs = NULL,
     78 		.es_coredump = coredump_netbsd32,
     79 		.es_setup_stack = exec_setup_stack,
     80 	},
     81 #endif
     82 #ifdef EXEC_ELF32
     83 	{
     84 		.es_hdrsz = sizeof (Elf32_Ehdr),
     85 		.es_makecmds = exec_elf32_makecmds,
     86 		.u = {
     87 			.elf_probe_func = netbsd32_elf32_probe,
     88 		},
     89 		.es_emul = &emul_netbsd32,
     90 		.es_prio = EXECSW_PRIO_ANY,
     91 		.es_arglen = ELF32_AUXSIZE,
     92 		.es_copyargs = netbsd32_elf32_copyargs,
     93 		.es_setregs = NULL,
     94 		.es_coredump = coredump_elf32,
     95 		.es_setup_stack = exec_setup_stack,	/* XXX XXX XXX */
     96 	},
     97 #endif
     98 };
     99 
    100 static int
    101 compat_netbsd32_modcmd(modcmd_t cmd, void *arg)
    102 {
    103 	int error;
    104 
    105 	switch (cmd) {
    106 	case MODULE_CMD_INIT:
    107 		netbsd32_sysctl_init();
    108 		error = exec_add(netbsd32_execsw,
    109 		    __arraycount(netbsd32_execsw));
    110 		if (error != 0)
    111 			netbsd32_sysctl_fini();
    112 		return error;
    113 
    114 	case MODULE_CMD_FINI:
    115 		error = exec_remove(netbsd32_execsw,
    116 		    __arraycount(netbsd32_execsw));
    117 		if (error == 0)
    118 			netbsd32_sysctl_fini();
    119 		return error;
    120 
    121 	default:
    122 		return ENOTTY;
    123 	}
    124 }
    125