freebsd_mod.c revision 1.1 
1/*	$NetBSD: freebsd_mod.c,v 1.1 2008/11/19 18:36:02 ad 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 1.1 2008/11/19 18:36:02 ad 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#if defined(EXEC_AOUT)
54#  define	MD2	",exec_aout"
55#else
56# define	MD2	""
57#endif
58
59#define ELF32_AUXSIZE (howmany(ELF_AUX_ENTRIES * sizeof(Aux32Info), \
60    sizeof(Elf32_Addr)) + MAXPATHLEN + ALIGN(1))
61
62MODULE(MODULE_CLASS_MISC, compat_freebsd, "compat,compat_ossaudio" MD1 MD2);
63
64static struct execsw freebsd_execsw[] = {
65#ifdef EXEC_ELF32
66	/* FreeBSD Elf32 (probe not 64-bit safe) */
67	{ sizeof (Elf32_Ehdr),
68	  exec_elf32_makecmds,
69	  { freebsd_elf32_probe },
70	  &emul_freebsd,
71	  EXECSW_PRIO_ANY,
72	  ELF32_AUXSIZE,
73	  elf32_copyargs,
74	  NULL,
75	  coredump_elf32,
76	  exec_setup_stack },
77#endif
78#ifdef EXEC_AOUT
79	/* FreeBSD a.out (native word size) */
80	{ FREEBSD_AOUT_HDR_SIZE,
81	  exec_freebsd_aout_makecmds,
82	  { NULL },
83	  &emul_freebsd,
84	  EXECSW_PRIO_ANY,
85	  0,
86	  copyargs,
87	  NULL,
88	  coredump_netbsd,
89	  exec_setup_stack },
90#endif
91};
92
93static int
94compat_freebsd_modcmd(modcmd_t cmd, void *arg)
95{
96	int error;
97
98	switch (cmd) {
99	case MODULE_CMD_INIT:
100		freebsd_sysctl_init();
101		error = exec_add(freebsd_execsw,
102		    __arraycount(freebsd_execsw));
103		if (error != 0)
104			freebsd_sysctl_fini();
105		return error;
106
107	case MODULE_CMD_FINI:
108		error = exec_remove(freebsd_execsw,
109		    __arraycount(freebsd_execsw));
110		if (error == 0)
111			freebsd_sysctl_fini();
112		return error;
113
114	default:
115		return ENOTTY;
116	}
117}
118