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 * 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