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netbsd32_mod.c revision 1.13.16.14 
      1 /*	$NetBSD: netbsd32_mod.c,v 1.13.16.14 2018/09/23 11:23:47 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 1.13.16.14 2018/09/23 11:23:47 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 kern_proc_32_hook_t kern_proc_32_hook;
     58 
     59 # define	DEPS1	"ksem,coredump,compat_util"
     60 
     61 #if defined(EXEC_ELF32)
     62 # define	DEPS2	",exec_elf32"
     63 #else
     64 # define	DEPS2	""
     65 #endif
     66 
     67 MODULE(MODULE_CLASS_EXEC, compat_netbsd32, DEPS1 DEPS2);
     68 
     69 static struct execsw netbsd32_execsw[] = {
     70 #ifdef EXEC_AOUT
     71 	{
     72 		.es_hdrsz = sizeof(struct netbsd32_exec),
     73 		.es_makecmds = exec_netbsd32_makecmds,
     74 		.u = {
     75 			.elf_probe_func = NULL,
     76 		},
     77 		.es_emul = &emul_netbsd32,
     78 		.es_prio = EXECSW_PRIO_FIRST,
     79 		.es_arglen = 0,
     80 		.es_copyargs = netbsd32_copyargs,
     81 		.es_setregs = NULL,
     82 		.es_coredump = coredump_netbsd32,
     83 		.es_setup_stack = exec_setup_stack,
     84 	},
     85 #endif
     86 #ifdef EXEC_ELF32
     87 	{
     88 		.es_hdrsz = sizeof (Elf32_Ehdr),
     89 		.es_makecmds = exec_elf32_makecmds,
     90 		.u = {
     91 			.elf_probe_func = netbsd32_elf32_probe,
     92 		},
     93 		.es_emul = &emul_netbsd32,
     94 		.es_prio = EXECSW_PRIO_ANY,
     95 		.es_arglen = ELF32_AUXSIZE,
     96 		.es_copyargs = netbsd32_elf32_copyargs,
     97 		.es_setregs = NULL,
     98 		.es_coredump = coredump_elf32,
     99 		.es_setup_stack = exec_setup_stack,	/* XXX XXX XXX */
    100 	},
    101 #endif
    102 };
    103 
    104 static int
    105 compat_netbsd32_modcmd(modcmd_t cmd, void *arg)
    106 {
    107 	int error;
    108 
    109 	switch (cmd) {
    110 	case MODULE_CMD_INIT:
    111 		error = exec_add(netbsd32_execsw,
    112 		    __arraycount(netbsd32_execsw));
    113 		if (error == 0) {
    114 			netbsd32_sysctl_init();
    115 			netbsd32_machdep_md_init();
    116 			kern_proc_32_init();
    117 		}
    118 		return error;
    119 
    120 	case MODULE_CMD_FINI:
    121 		netbsd32_machdep_md_fini();
    122 		netbsd32_sysctl_fini();
    123 		kern_proc_32_fini();
    124 
    125 		error = exec_remove(netbsd32_execsw,
    126 		    __arraycount(netbsd32_execsw));
    127 		if (error) {
    128 			kern_proc_32_init();
    129 			netbsd32_sysctl_init();
    130 			netbsd32_machdep_md_init();
    131 		}
    132 		return error;
    133 
    134 	default:
    135 		return ENOTTY;
    136 	}
    137 }
    138