Index: head/sys/powerpc/include/ifunc.h
===================================================================
--- head/sys/powerpc/include/ifunc.h
+++ head/sys/powerpc/include/ifunc.h
@@ -0,0 +1,60 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2019 Brandon Bergren <bdragon@FreeBSD.org>
+ * Copyright (c) 2015-2018 The FreeBSD Foundation. All rights reserved.
+ *
+ * Part of 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 __POWERPC_IFUNC_H
+#define	__POWERPC_IFUNC_H
+
+#include <sys/types.h>
+
+#define	DEFINE_IFUNC(qual, ret_type, name, args)			\
+    static ret_type (*name##_resolver(void))args __used;		\
+    qual ret_type name args __attribute__((ifunc(#name "_resolver")));	\
+    static ret_type (*name##_resolver(void))args
+
+#define	DEFINE_UIFUNC(qual, ret_type, name, args)			\
+    static ret_type (*name##_resolver(register_t, register_t,		\
+	register_t, register_t, register_t, register_t, register_t,	\
+	register_t))args __used;					\
+    qual ret_type name args __attribute__((ifunc(#name "_resolver")));	\
+    static ret_type (*name##_resolver(					\
+	register_t cpu_features,					\
+	register_t cpu_features2,					\
+	register_t arg3 __unused,					\
+	register_t arg4 __unused,					\
+	register_t arg5 __unused,					\
+	register_t arg6 __unused,					\
+	register_t arg7 __unused,					\
+	register_t arg8 __unused))args
+
+#endif