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netbsd32_mod.c revision 1.13.16.18 
      1 /*	$NetBSD: netbsd32_mod.c,v 1.13.16.18 2019/01/24 04:08:09 pgoyette 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 1.13.16.18 2019/01/24 04:08:09 pgoyette 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/exec_elf.h>
     47 #include <sys/module_hook.h>
     48 
     49 #include <compat/netbsd32/netbsd32_sysctl.h>
     50 #include <compat/netbsd32/netbsd32_kern_proc.h>
     51 #include <compat/netbsd32/netbsd32_exec.h>
     52 
     53 #define ELF32_AUXSIZE (howmany(ELF_AUX_ENTRIES * sizeof(Aux32Info), \
     54     sizeof(Elf32_Addr)) + MAXPATHLEN + ALIGN(1))
     55 
     56 struct compat32_80_modctl_hook_t compat32_80_modctl_hook;
     57 struct netbsd32_machine32_hook_t netbsd32_machine32_hook;
     58 
     59 
     60 # define	DEPS1	"ksem,coredump,compat_util"
     61 
     62 #if defined(EXEC_ELF32)
     63 # define	DEPS2	",exec_elf32"
     64 #else
     65 # define	DEPS2	""
     66 #endif
     67 
     68 MODULE(MODULE_CLASS_EXEC, compat_netbsd32, DEPS1 DEPS2);
     69 
     70 static struct execsw netbsd32_execsw[] = {
     71 #ifdef EXEC_AOUT
     72 	{
     73 		.es_hdrsz = sizeof(struct netbsd32_exec),
     74 		.es_makecmds = exec_netbsd32_makecmds,
     75 		.u = {
     76 			.elf_probe_func = NULL,
     77 		},
     78 		.es_emul = &emul_netbsd32,
     79 		.es_prio = EXECSW_PRIO_FIRST,
     80 		.es_arglen = 0,
     81 		.es_copyargs = netbsd32_copyargs,
     82 		.es_setregs = NULL,
     83 		.es_coredump = coredump_netbsd32,
     84 		.es_setup_stack = exec_setup_stack,
     85 	},
     86 #endif
     87 #ifdef EXEC_ELF32
     88 	{
     89 		.es_hdrsz = sizeof (Elf32_Ehdr),
     90 		.es_makecmds = exec_elf32_makecmds,
     91 		.u = {
     92 			.elf_probe_func = netbsd32_elf32_probe,
     93 		},
     94 		.es_emul = &emul_netbsd32,
     95 		.es_prio = EXECSW_PRIO_ANY,
     96 		.es_arglen = ELF32_AUXSIZE,
     97 		.es_copyargs = netbsd32_elf32_copyargs,
     98 		.es_setregs = NULL,
     99 		.es_coredump = coredump_elf32,
    100 		.es_setup_stack = exec_setup_stack,
    101 	},
    102 #endif
    103 };
    104 
    105 static int
    106 compat_netbsd32_modcmd(modcmd_t cmd, void *arg)
    107 {
    108 	int error;
    109 
    110 	switch (cmd) {
    111 	case MODULE_CMD_INIT:
    112 		error = exec_add(netbsd32_execsw,
    113 		    __arraycount(netbsd32_execsw));
    114 		if (error == 0) {
    115 			netbsd32_sysctl_init();
    116 			netbsd32_machdep_md_init();
    117 			netbsd32_kern_proc_32_init();
    118 		}
    119 		return error;
    120 
    121 	case MODULE_CMD_FINI:
    122 		netbsd32_machdep_md_fini();
    123 		netbsd32_sysctl_fini();
    124 		netbsd32_kern_proc_32_fini();
    125 
    126 		error = exec_remove(netbsd32_execsw,
    127 		    __arraycount(netbsd32_execsw));
    128 		if (error) {
    129 			netbsd32_kern_proc_32_init();
    130 			netbsd32_sysctl_init();
    131 			netbsd32_machdep_md_init();
    132 		}
    133 		return error;
    134 
    135 	default:
    136 		return ENOTTY;
    137 	}
    138 }
    139