1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1998 John Birrell <jb@cimlogic.com.au>. 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. Neither the name of the author nor the names of any co-contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <stdio.h> 33 34 #include "spinlock.h" 35 #include "libc_private.h" 36 37 long _atomic_lock_stub(volatile long *); 38 void _spinlock_stub(spinlock_t *); 39 void _spinunlock_stub(spinlock_t *); 40 41 __weak_reference(_atomic_lock_stub, _atomic_lock); 42 43 long 44 _atomic_lock_stub(volatile long *lck __unused) 45 { 46 return (0L); 47 } 48 49 #pragma weak _spinlock 50 void 51 _spinlock(spinlock_t *lck) 52 { 53 54 ((void (*)(spinlock_t *lck))__libc_interposing[INTERPOS_spinlock]) 55 (lck); 56 57 } 58 59 #pragma weak _spinunlock 60 void 61 _spinunlock(spinlock_t *lck) 62 { 63 64 ((void (*)(spinlock_t *lck))__libc_interposing[INTERPOS_spinunlock]) 65 (lck); 66 67 } 68 69 void 70 __libc_spinlock_stub(spinlock_t *lck __unused) 71 { 72 } 73 74 void 75 __libc_spinunlock_stub(spinlock_t *lck __unused) 76 { 77 } 78