1 /* $NetBSD: freebsd_mod.c,v 1.7 2019/02/05 00:40:15 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: freebsd_mod.c,v 1.7 2019/02/05 00:40:15 pgoyette Exp $");
34
35 #ifdef _KERNEL_OPT
36 #include "opt_execfmt.h"
37 #endif
38
39 #include <sys/param.h>
40 #include <sys/module.h>
41 #include <sys/exec.h>
42 #include <sys/exec_elf.h>
43 #include <sys/signalvar.h>
44
45 #include <compat/freebsd/freebsd_exec.h>
46 #include <compat/freebsd/freebsd_sysctl.h>
47
48 #if defined(EXEC_ELF32)
49 # define MD1 ",exec_elf32"
50 #else
51 # define MD1 ""
52 #endif
53
54 #define ELF32_AUXSIZE (howmany(ELF_AUX_ENTRIES * sizeof(Aux32Info), \
55 sizeof(Elf32_Addr)) + MAXPATHLEN + ALIGN(1))
56
57 MODULE(MODULE_CLASS_EXEC, compat_freebsd, "compat_09,compat_ossaudio" MD1);
58
59 static struct execsw freebsd_execsw[] = {
60 #ifdef EXEC_ELF32
61 /* FreeBSD Elf32 (probe not 64-bit safe) */
62 {
63 .es_hdrsz = sizeof (Elf32_Ehdr),
64 .es_makecmds = exec_elf32_makecmds,
65 .u = {
66 .elf_probe_func = freebsd_elf32_probe,
67 },
68 .es_emul = &emul_freebsd,
69 .es_prio = EXECSW_PRIO_ANY,
70 .es_arglen = ELF32_AUXSIZE,
71 .es_copyargs = elf32_copyargs,
72 .es_setregs = NULL,
73 .es_coredump = coredump_elf32,
74 .es_setup_stack = exec_setup_stack,
75 },
76 #endif
77 };
78
79 static int
compat_freebsd_modcmd(modcmd_t cmd,void * arg)80 compat_freebsd_modcmd(modcmd_t cmd, void *arg)
81 {
82 int error;
83
84 switch (cmd) {
85 case MODULE_CMD_INIT:
86 freebsd_sysctl_init();
87 error = exec_add(freebsd_execsw,
88 __arraycount(freebsd_execsw));
89 if (error != 0)
90 freebsd_sysctl_fini();
91 return error;
92
93 case MODULE_CMD_FINI:
94 error = exec_remove(freebsd_execsw,
95 __arraycount(freebsd_execsw));
96 if (error == 0)
97 freebsd_sysctl_fini();
98 return error;
99
100 default:
101 return ENOTTY;
102 }
103 }
104