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netbsd32_mod.c revision 1.13.16.9 
      1 /*	$NetBSD: netbsd32_mod.c,v 1.13.16.9 2018/09/14 00:47:48 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 1.13.16.9 2018/09/14 00:47:48 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 
     48 #include <compat/netbsd32/netbsd32_sysctl.h>
     49 #include <compat/netbsd32/netbsd32_exec.h>
     50 
     51 #define ELF32_AUXSIZE (howmany(ELF_AUX_ENTRIES * sizeof(Aux32Info), \
     52     sizeof(Elf32_Addr)) + MAXPATHLEN + ALIGN(1))
     53 
     54 int compat32_80_modctl_compat_stub(struct lwp *,
     55     const struct netbsd32_modctl_args *, register_t *);
     56 
     57 int (*vec_compat32_80_modctl)(struct lwp *,
     58     const struct netbsd32_modctl_args *, register_t *);
     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,	/* XXX XXX XXX */
    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 		netbsd32_sysctl_init();
    113 		error = exec_add(netbsd32_execsw,
    114 		    __arraycount(netbsd32_execsw));
    115 		vec_compat32_80_modctl = compat32_80_modctl_compat_stub;
    116 		if (error != 0) {
    117 			vec_compat32_80_modctl = (void *)enosys;
    118 			netbsd32_sysctl_fini();
    119 		}
    120 		return error;
    121 
    122 	case MODULE_CMD_FINI:
    123 		vec_compat32_80_modctl = (void *)enosys;
    124 		error = exec_remove(netbsd32_execsw,
    125 		    __arraycount(netbsd32_execsw));
    126 		if (error)
    127 			vec_compat32_80_modctl = compat32_80_modctl_compat_stub;
    128 		else
    129 			netbsd32_sysctl_fini();
    130 		return error;
    131 
    132 	default:
    133 		return ENOTTY;
    134 	}
    135 }
    136