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 29 #ifndef __X86_IFUNC_H 30 #define __X86_IFUNC_H 31 32 #define DEFINE_IFUNC(qual, ret_type, name, args) \ 33 static ret_type (*name##_resolver(void))args __used; \ 34 qual ret_type name args __attribute__((ifunc(#name "_resolver"))); \ 35 static ret_type (*name##_resolver(void))args 36 37 #define DEFINE_UIFUNC(qual, ret_type, name, args) \ 38 static ret_type (*name##_resolver(uint32_t, uint32_t, uint32_t, \ 39 uint32_t))args __used; \ 40 qual ret_type name args __attribute__((ifunc(#name "_resolver"))); \ 41 static ret_type (*name##_resolver( \ 42 uint32_t cpu_feature __unused, \ 43 uint32_t cpu_feature2 __unused, \ 44 uint32_t cpu_stdext_feature __unused, \ 45 uint32_t cpu_stdext_feature2 __unused))args 46 47 #endif 48