freebsd_mod.c revision 1.5 
1/*	$NetBSD: freebsd_mod.c,v 1.5 2014/03/07 02:02:16 christos 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 1.5 2014/03/07 02:02:16 christos 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/exec_aout.h>
44#include <sys/signalvar.h>
45
46#include <compat/freebsd/freebsd_exec.h>
47#include <compat/freebsd/freebsd_sysctl.h>
48
49#if defined(EXEC_ELF32)
50# define	MD1	",exec_elf32"
51#else
52# define	MD1	""
53#endif
54#if defined(EXEC_AOUT)
55#  define	MD2	",exec_aout"
56#else
57# define	MD2	""
58#endif
59
60#define ELF32_AUXSIZE (howmany(ELF_AUX_ENTRIES * sizeof(Aux32Info), \
61    sizeof(Elf32_Addr)) + MAXPATHLEN + ALIGN(1))
62
63MODULE(MODULE_CLASS_EXEC, compat_freebsd, "compat,compat_ossaudio" MD1 MD2);
64
65static struct execsw freebsd_execsw[] = {
66#ifdef EXEC_ELF32
67	/* FreeBSD Elf32 (probe not 64-bit safe) */
68	{
69		.es_hdrsz = sizeof (Elf32_Ehdr),
70		.es_makecmds = exec_elf32_makecmds,
71		.u = {
72			.elf_probe_func = freebsd_elf32_probe,
73		},
74		.es_emul = &emul_freebsd,
75		.es_prio = EXECSW_PRIO_ANY,
76		.es_arglen = ELF32_AUXSIZE,
77		.es_copyargs = elf32_copyargs,
78		.es_setregs = NULL,
79		.es_coredump = coredump_elf32,
80		.es_setup_stack = exec_setup_stack,
81	},
82#endif
83#ifdef EXEC_AOUT
84	/* FreeBSD a.out (native word size) */
85	{
86		.es_hdrsz = FREEBSD_AOUT_HDR_SIZE,
87		.es_makecmds = exec_freebsd_aout_makecmds,
88		.u = {
89			.elf_probe_func = NULL,
90		},
91		.es_emul = &emul_freebsd,
92		.es_prio = EXECSW_PRIO_ANY,
93		.es_arglen = 0,
94		.es_copyargs = copyargs,
95		.es_setregs = NULL,
96		.es_coredump = coredump_netbsd,
97		.es_setup_stack = exec_setup_stack,
98	},
99#endif
100};
101
102static int
103compat_freebsd_modcmd(modcmd_t cmd, void *arg)
104{
105	int error;
106
107	switch (cmd) {
108	case MODULE_CMD_INIT:
109		freebsd_sysctl_init();
110		error = exec_add(freebsd_execsw,
111		    __arraycount(freebsd_execsw));
112		if (error != 0)
113			freebsd_sysctl_fini();
114		return error;
115
116	case MODULE_CMD_FINI:
117		error = exec_remove(freebsd_execsw,
118		    __arraycount(freebsd_execsw));
119		if (error == 0)
120			freebsd_sysctl_fini();
121		return error;
122
123	default:
124		return ENOTTY;
125	}
126}
127