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 __ARM64_IFUNC_H 30 #define __ARM64_IFUNC_H 31 32 #include <sys/types.h> 33 34 struct __ifunc_arg_t 35 { 36 unsigned long _size; /* Size of the struct, so it can grow. */ 37 unsigned long _hwcap; 38 unsigned long _hwcap2; 39 unsigned long _hwcap3; 40 unsigned long _hwcap4; 41 }; 42 43 typedef struct __ifunc_arg_t __ifunc_arg_t; 44 45 #define _IFUNC_ARG_HWCAP (1ULL << 62) 46 47 #define DEFINE_IFUNC(qual, ret_type, name, args) \ 48 static ret_type (*__CONCAT(name, _resolver)(void))args __used; \ 49 qual ret_type name args \ 50 __attribute__((ifunc(__XSTRING(name) "_resolver"))); \ 51 static ret_type (*__CONCAT(name, _resolver)(void))args 52 53 #define DEFINE_UIFUNC(qual, ret_type, name, args) \ 54 static ret_type (*__CONCAT(name, _resolver)(uint64_t, \ 55 const struct __ifunc_arg_t *ifunc_arg, \ 56 uint64_t, uint64_t, uint64_t, uint64_t, uint64_t, \ 57 uint64_t))args __used; \ 58 qual ret_type name args \ 59 __attribute__((ifunc(__XSTRING(name) "_resolver"))); \ 60 static ret_type (*__CONCAT(name, _resolver)( \ 61 uint64_t at_hwcap __unused, \ 62 const struct __ifunc_arg_t *ifunc_arg __unused, \ 63 uint64_t _arg3 __unused, \ 64 uint64_t _arg4 __unused, \ 65 uint64_t _arg5 __unused, \ 66 uint64_t _arg6 __unused, \ 67 uint64_t _arg7 __unused, \ 68 uint64_t _arg8 __unused))args 69 70 #endif 71