/*-
 * Copyright (c) 2015, 2017 The FreeBSD Foundation
 * All rights reserved.
 *
 * This software was developed by Konstantin Belousov <kib@FreeBSD.org>
 * under sponsorship from the FreeBSD Foundation.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * $FreeBSD$
 */

#ifndef __X86_IFUNC_H
#define	__X86_IFUNC_H

#define	DECLARE_LIFUNC(ret_type, name, args)				\
ret_type name args

#define	DEFINE_LIFUNC(scope, selector_qual, ret_type, name, args)	\
__asm__ (scope "\t" #name "\n"						\
	 "\t.type\t" #name ",@function\n"				\
	 #name ":\n"							\
	 "\tjmp	*" #name "_selector\n"					\
	 "\t.size\t" #name ",\t. - "#name);				\
selector_qual ret_type (*name##_selector)args  __used;			\
DECLARE_LIFUNC(ret_type, name, args)

#define	DEFINE_STATIC_LIFUNC(ret_type, name, args)			\
	DEFINE_LIFUNC(".local", static, ret_type, name, args)

#define	DEFINE_GLOBAL_LIFUNC(ret_type, name, args)			\
	DEFINE_LIFUNC(".globl", , ret_type, name, args)

#define	DEFINE_IFUNC(qual, ret_type, name, args, resolver_qual)	\
    resolver_qual ret_type (*name##_resolver(void))args __used;		\
    qual ret_type name args __attribute__((ifunc(#name "_resolver")));	\
    resolver_qual ret_type (*name##_resolver(void))args

#endif