xref: /freebsd/sys/arm64/include/ifunc.h (revision b077aed33b7b6aefca7b17ddb250cf521f938613)
1 /*-
2  * Copyright (c) 2015-2018 The FreeBSD Foundation
3  *
4  * This software was developed by Konstantin Belousov <kib@FreeBSD.org>
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, 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  *
16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26  * SUCH DAMAGE.
27  *
28  * $FreeBSD$
29  */
30 
31 #ifndef __ARM64_IFUNC_H
32 #define	__ARM64_IFUNC_H
33 
34 #define	DEFINE_IFUNC(qual, ret_type, name, args)			\
35     static ret_type (*name##_resolver(void))args __used;		\
36     qual ret_type name args __attribute__((ifunc(#name "_resolver")));	\
37     static ret_type (*name##_resolver(void))args
38 
39 #define	DEFINE_UIFUNC(qual, ret_type, name, args)			\
40     static ret_type (*name##_resolver(uint64_t, uint64_t,		\
41 	uint64_t, uint64_t, uint64_t, uint64_t, uint64_t,		\
42 	uint64_t))args __used;						\
43     qual ret_type name args __attribute__((ifunc(#name "_resolver")));	\
44     static ret_type (*name##_resolver(uint64_t _arg1 __unused,		\
45 	uint64_t _arg2 __unused, uint64_t _arg3 __unused,		\
46 	uint64_t _arg4 __unused, uint64_t _arg5 __unused,		\
47 	uint64_t _arg6 __unused, uint64_t _arg7 __unused,		\
48 	uint64_t _arg8 __unused))args
49 
50 #endif
51