1/* $NetBSD: linux_mod.c,v 1.6 2015/12/03 02:51:01 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: linux_mod.c,v 1.6 2015/12/03 02:51:01 pgoyette Exp $");
34
35#ifdef _KERNEL_OPT
36#include "opt_execfmt.h"
37#endif
38
39#ifndef ELFSIZE
40#define ELFSIZE ARCH_ELFSIZE
41#endif
42
43#include <sys/param.h>
44#include <sys/module.h>
45#include <sys/exec.h>
46#include <sys/signalvar.h>
47
48#include <compat/linux/common/linux_sysctl.h>
49#include <compat/linux/common/linux_futex.h>
50#include <compat/linux/common/linux_exec.h>
51
52#if defined(EXEC_ELF32) && ELFSIZE == 32
53# define MD1 ",exec_elf32"
54#else
55# define MD1 ""
56#endif
57#if defined(EXEC_ELF64)
58# define MD2 ",exec_elf64"
59#else
60# define MD2 ""
61#endif
62#if defined(EXEC_AOUT)
63# define MD3 ",exec_aout"
64#else
65# define MD3 ""
66#endif
67
68MODULE(MODULE_CLASS_EXEC, compat_linux, "compat,compat_ossaudio,sysv_ipc"
69 MD1 MD2 MD3);
70
71static struct execsw linux_execsw[] = {
72#if defined(EXEC_ELF32) && ELFSIZE == 32
73 {
74 .es_hdrsz = sizeof (Elf32_Ehdr),
75 .es_makecmds = exec_elf32_makecmds,
76 .u = {
77 .elf_probe_func = linux_elf32_probe,
78 },
79 .es_emul = &emul_linux,
80 .es_prio = EXECSW_PRIO_ANY,
81 .es_arglen = LINUX_ELF_AUX_ARGSIZ,
82 .es_copyargs = linux_elf32_copyargs,
83 .es_setregs = NULL,
84 .es_coredump = coredump_elf32,
85 .es_setup_stack = linux_exec_setup_stack,
86 },
87#elif defined(EXEC_ELF64)
88 {
89 .es_hdrsz = sizeof (Elf64_Ehdr),
90 .es_makecmds = exec_elf64_makecmds,
91 .u = {
92 .elf_probe_func = linux_elf64_probe,
93 },
94 .es_emul = &emul_linux,
95 .es_prio = EXECSW_PRIO_ANY,
96 .es_arglen = LINUX_ELF_AUX_ARGSIZ,
97 .es_copyargs = linux_elf64_copyargs,
98 .es_setregs = NULL,
99 .es_coredump = coredump_elf64,
100 .es_setup_stack = linux_exec_setup_stack,
101 },
102#endif
103#ifdef EXEC_AOUT
104 {
105 .es_hdrsz = LINUX_AOUT_HDR_SIZE,
106 .es_makecmds = exec_linux_aout_makecmds,
107 .u = {
108 .elf_probe_func = NULL,
109 },
110 .es_emul = &emul_linux,
111 .es_prio = EXECSW_PRIO_LAST,
112 .es_arglen = LINUX_AOUT_AUX_ARGSIZ,
113 .es_copyargs = linux_aout_copyargs,
114 .es_setregs = NULL,
115 .es_coredump = coredump_netbsd,
116 .es_setup_stack = linux_exec_setup_stack,
117 },
118#endif
119};
120
121static int
122compat_linux_modcmd(modcmd_t cmd, void *arg)
123{
124 int error;
125
126 switch (cmd) {
127 case MODULE_CMD_INIT:
128 linux_futex_init();
129 linux_sysctl_init();
130 error = exec_add(linux_execsw,
131 __arraycount(linux_execsw));
132 if (error != 0)
133 linux_sysctl_fini();
134 return error;
135
136 case MODULE_CMD_FINI:
137 error = exec_remove(linux_execsw,
138 __arraycount(linux_execsw));
139 if (error == 0) {
140 linux_sysctl_fini();
141 linux_futex_fini();
142 }
143 return error;
144
145 default:
146 return ENOTTY;
147 }
148}
149