1/* $NetBSD: exec_elf32.c,v 1.141 2014/07/22 08:18:33 maxv Exp $ */
2
3/*
4 * Copyright (c) 1996 Christopher G. Demetriou
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed by Christopher G. Demetriou
18 * for the NetBSD Project.
19 * 4. The name of the author may not be used to endorse or promote products
20 * derived from this software without specific prior written permission
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34#include <sys/cdefs.h>
35__KERNEL_RCSID(0, "$NetBSD: exec_elf32.c,v 1.141 2014/07/22 08:18:33 maxv Exp $");
36
37#define ELFSIZE 32
38
39#include "exec_elf.c"
40
41#include <sys/module.h>
42
43#define ELF32_AUXSIZE (howmany(ELF_AUX_ENTRIES * sizeof(Aux32Info), \
44 sizeof(Elf32_Addr)) + MAXPATHLEN + ALIGN(1))
45
46#ifdef COREDUMP
47#define DEP "coredump"
48#else
49#define DEP NULL
50#endif
51
52MODULE(MODULE_CLASS_EXEC, exec_elf32, DEP);
53
54static struct execsw exec_elf32_execsw[] = {
55 {
56 .es_hdrsz = sizeof (Elf32_Ehdr),
57 .es_makecmds = exec_elf32_makecmds,
58 .u = {
59 .elf_probe_func = netbsd_elf32_probe,
60 },
61 .es_emul = &emul_netbsd,
62 .es_prio = EXECSW_PRIO_FIRST,
63 .es_arglen = ELF32_AUXSIZE,
64 .es_copyargs = elf32_copyargs,
65 .es_setregs = NULL,
66 .es_coredump = coredump_elf32,
67 .es_setup_stack = exec_setup_stack,
68 },
69#if EXEC_ELF_NOTELESS
70 {
71 .es_hdrsz = sizeof (Elf32_Ehdr),
72 .es_makecmds = exec_elf32_makecmds,
73 .u {
74 elf_probe_func = NULL,
75 },
76 .es_emul = &emul_netbsd,
77 .es_prio = EXECSW_PRIO_LAST,
78 .es_arglen = ELF32_AUXSIZE,
79 .es_copyargs = elf32_copyargs,
80 .es_setregs = NULL,
81 .es_coredump = coredump_elf32,
82 .es_setup_stack = exec_setup_stack,
83 },
84#endif
85};
86
87static int
88exec_elf32_modcmd(modcmd_t cmd, void *arg)
89{
90#if ARCH_ELFSIZE == 64
91 /*
92 * If we are on a 64bit system, we don't want the 32bit execsw[] to be
93 * added in the global array, because the exec_elf32 module only works
94 * on 32bit systems.
95 *
96 * However, we need the exec_elf32 module, because it will make the 32bit
97 * functions available for netbsd32 and linux32.
98 *
99 * Therefore, allow this module on 64bit systems, but make it dormant.
100 */
101
102 (void)exec_elf32_execsw; /* unused */
103
104 switch (cmd) {
105 case MODULE_CMD_INIT:
106 case MODULE_CMD_FINI:
107 return 0;
108 default:
109 return ENOTTY;
110 }
111#else /* ARCH_ELFSIZE == 64 */
112 switch (cmd) {
113 case MODULE_CMD_INIT:
114 return exec_add(exec_elf32_execsw,
115 __arraycount(exec_elf32_execsw));
116
117 case MODULE_CMD_FINI:
118 return exec_remove(exec_elf32_execsw,
119 __arraycount(exec_elf32_execsw));
120
121 default:
122 return ENOTTY;
123 }
124#endif /* ARCH_ELFSIZE == 64 */
125}
126