freebsd_mod.c revision 1.3 
1/*	$NetBSD: freebsd_mod.c,v 1.3 2013/09/19 18:50:35 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 1.3 2013/09/19 18:50:35 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	{ sizeof (Elf32_Ehdr),
69	  exec_elf32_makecmds,
70	  { freebsd_elf32_probe },
71	  &emul_freebsd,
72	  EXECSW_PRIO_ANY,
73	  ELF32_AUXSIZE,
74	  elf32_copyargs,
75	  NULL,
76	  coredump_elf32,
77	  exec_setup_stack },
78#endif
79#ifdef EXEC_AOUT
80	/* FreeBSD a.out (native word size) */
81	{ FREEBSD_AOUT_HDR_SIZE,
82	  exec_freebsd_aout_makecmds,
83	  { NULL },
84	  &emul_freebsd,
85	  EXECSW_PRIO_ANY,
86	  0,
87	  copyargs,
88	  NULL,
89	  coredump_netbsd,
90	  exec_setup_stack },
91#endif
92};
93
94static int
95compat_freebsd_modcmd(modcmd_t cmd, void *arg)
96{
97	int error;
98
99	switch (cmd) {
100	case MODULE_CMD_INIT:
101		freebsd_sysctl_init();
102		error = exec_add(freebsd_execsw,
103		    __arraycount(freebsd_execsw));
104		if (error != 0)
105			freebsd_sysctl_fini();
106		return error;
107
108	case MODULE_CMD_FINI:
109		error = exec_remove(freebsd_execsw,
110		    __arraycount(freebsd_execsw));
111		if (error == 0)
112			freebsd_sysctl_fini();
113		return error;
114
115	default:
116		return ENOTTY;
117	}
118}
119