1 /*
2 * Copyright (c) 2014 The FreeBSD Foundation.
3 *
4 * Portions of this software were developed by Konstantin Belousov
5 * under sponsorship from the FreeBSD Foundation.
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(s), this list of conditions and the following disclaimer as
12 * the first lines of this file unmodified other than the possible
13 * addition of one or more copyright notices.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice(s), this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
17 * distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
20 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
23 * 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
26 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
28 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
29 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include <sys/types.h>
33 #include <stddef.h>
34 #include "libc_private.h"
35
36 #define SLOT(a, b) \
37 [INTERPOS_##a] = (interpos_func_t)b
38 interpos_func_t __libc_interposing[INTERPOS_MAX] = {
39 SLOT(system, __libc_system),
40 SLOT(tcdrain, __libc_tcdrain),
41 SLOT(_pthread_mutex_init_calloc_cb, _pthread_mutex_init_calloc_cb_stub),
42 SLOT(spinlock, __libc_spinlock_stub),
43 SLOT(spinunlock, __libc_spinunlock_stub),
44 SLOT(map_stacks_exec, __libc_map_stacks_exec),
45 SLOT(distribute_static_tls, __libc_distribute_static_tls),
46 };
47 #undef SLOT
48
49 interpos_func_t *
__libc_interposing_slot(int interposno)50 __libc_interposing_slot(int interposno)
51 {
52 if (__libc_interposing[interposno] == NULL)
53 return (__libsys_interposing_slot(interposno));
54 return (&__libc_interposing[interposno]);
55 }
56