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netbsd32_mod.c revision 1.13.16.5 
      1 /*	$NetBSD: netbsd32_mod.c,v 1.13.16.5 2018/09/11 04:53:42 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 1.13.16.5 2018/09/11 04:53:42 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/rnd.h>
     48 
     49 #include <compat/netbsd32/netbsd32_sysctl.h>
     50 #include <compat/netbsd32/netbsd32_exec.h>
     51 #include <compat/sys/rnd.h>
     52 
     53 # define	DEPS1	"compat_09,ksem"
     54 
     55 #if defined(EXEC_ELF32)
     56 # define	DEPS2	",exec_elf32"
     57 #else
     58 # define	DEPS2	""
     59 #endif
     60 
     61 #define ELF32_AUXSIZE (howmany(ELF_AUX_ENTRIES * sizeof(Aux32Info), \
     62     sizeof(Elf32_Addr)) + MAXPATHLEN + ALIGN(1))
     63 
     64 int compat32_80_modctl_compat_stub(struct lwp *,
     65     const struct netbsd32_modctl_args *, register_t *);
     66 
     67 int (*vec_compat32_80_modctl)(struct lwp *,
     68     const struct netbsd32_modctl_args *, register_t *);
     69 
     70 MODULE(MODULE_CLASS_EXEC, compat_netbsd32, DEPS1 DEPS2);
     71 
     72 static struct execsw netbsd32_execsw[] = {
     73 #ifdef EXEC_AOUT
     74 	{
     75 		.es_hdrsz = sizeof(struct netbsd32_exec),
     76 		.es_makecmds = exec_netbsd32_makecmds,
     77 		.u = {
     78 			.elf_probe_func = NULL,
     79 		},
     80 		.es_emul = &emul_netbsd32,
     81 		.es_prio = EXECSW_PRIO_FIRST,
     82 		.es_arglen = 0,
     83 		.es_copyargs = netbsd32_copyargs,
     84 		.es_setregs = NULL,
     85 		.es_coredump = coredump_netbsd32,
     86 		.es_setup_stack = exec_setup_stack,
     87 	},
     88 #endif
     89 #ifdef EXEC_ELF32
     90 	{
     91 		.es_hdrsz = sizeof (Elf32_Ehdr),
     92 		.es_makecmds = exec_elf32_makecmds,
     93 		.u = {
     94 			.elf_probe_func = netbsd32_elf32_probe,
     95 		},
     96 		.es_emul = &emul_netbsd32,
     97 		.es_prio = EXECSW_PRIO_ANY,
     98 		.es_arglen = ELF32_AUXSIZE,
     99 		.es_copyargs = netbsd32_elf32_copyargs,
    100 		.es_setregs = NULL,
    101 		.es_coredump = coredump_elf32,
    102 		.es_setup_stack = exec_setup_stack,	/* XXX XXX XXX */
    103 	},
    104 #endif
    105 };
    106 
    107 static int
    108 compat_netbsd32_modcmd(modcmd_t cmd, void *arg)
    109 {
    110 	int error;
    111 
    112 	switch (cmd) {
    113 	case MODULE_CMD_INIT:
    114 		netbsd32_sysctl_init();
    115 		error = exec_add(netbsd32_execsw,
    116 		    __arraycount(netbsd32_execsw));
    117 		vec_compat32_50_rnd_ioctl = compat32_50_rnd_ioctl;
    118 		vec_compat32_80_modctl = compat32_80_modctl_compat_stub;
    119 		if (error != 0) {
    120 			vec_compat32_50_rnd_ioctl = (void *)enosys;
    121 			vec_compat32_80_modctl = (void *)enosys;
    122 			netbsd32_sysctl_fini();
    123 		}
    124 		return error;
    125 
    126 	case MODULE_CMD_FINI:
    127 		vec_compat32_50_rnd_ioctl = (void *)enosys;
    128 		vec_compat32_80_modctl = (void *)enosys;
    129 		error = exec_remove(netbsd32_execsw,
    130 		    __arraycount(netbsd32_execsw));
    131 		if (error == 0)
    132 			netbsd32_sysctl_fini();
    133 		return error;
    134 
    135 	default:
    136 		return ENOTTY;
    137 	}
    138 }
    139