ifunc.h

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    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 __X86_IFUNC_H
   32 #define __X86_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(uint32_t, uint32_t, uint32_t,     \
   41         uint32_t))args __used;                                          \
   42     qual ret_type name args __attribute__((ifunc(#name "_resolver")));  \
   43     static ret_type (*name##_resolver(                          \
   44         uint32_t cpu_feature __unused,                                  \
   45         uint32_t cpu_feature2 __unused,                                 \
   46         uint32_t cpu_stdext_feature __unused,                           \
   47         uint32_t cpu_stdext_feature2 __unused))args
   48 
   49 #endif

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FreeBSD/Linux Kernel Cross Reference sys/x86/include/ifunc.h

FreeBSD/Linux Kernel Cross Reference
sys/x86/include/ifunc.h