freebsd_mod.c revision 1.6 
1/*	$NetBSD: freebsd_mod.c,v 1.6 2017/07/29 10:39:48 maxv 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 1.6 2017/07/29 10:39:48 maxv 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
57MODULE(MODULE_CLASS_EXEC, compat_freebsd, "compat,compat_ossaudio" MD1);
58
59static 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
79static int
80compat_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