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diff --git a/sys/amd64/include/asmacros.h b/sys/amd64/include/asmacros.h
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+++ b/sys/amd64/include/asmacros.h
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+/*-
+ * Copyright (c) 1993 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * 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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ *
+ *	$Id: asmacros.h,v 1.3 1994/08/02 07:38:40 davidg Exp $
+ */
+
+#ifndef _ASMACROS_H_
+#define _ASMACROS_H_	1
+
+#define ALIGN_DATA	.align	2	/* 4 byte alignment, zero filled */
+#define ALIGN_TEXT	.align	2,0x90	/* 4-byte alignment, nop filled */
+#define SUPERALIGN_TEXT	.align	4,0x90	/* 16-byte alignment (better for 486), nop filled */
+
+#define GEN_ENTRY(name)		ALIGN_TEXT;	.globl name; name:
+#define NON_GPROF_ENTRY(name)	GEN_ENTRY(_/**/name)
+
+/* These three are place holders for future changes to the profiling code */
+#define MCOUNT_LABEL(name)
+#define MEXITCOUNT
+#define FAKE_MCOUNT(caller)
+
+#ifdef GPROF
+/*
+ * ALTENTRY() must be before a corresponding ENTRY() so that it can jump
+ * over the mcounting.
+ */
+#define ALTENTRY(name)	GEN_ENTRY(_/**/name); MCOUNT; jmp 2f
+#define ENTRY(name)	GEN_ENTRY(_/**/name); MCOUNT; 2:
+/*
+ * The call to mcount supports the usual (bad) conventions.  We allocate
+ * some data and pass a pointer to it although the FreeBSD doesn't use
+ * the data.  We set up a frame before calling mcount because that is
+ * the standard convention although it makes work for both mcount and
+ * callers.
+ */
+#define MCOUNT		.data; ALIGN_DATA; 1:; .long 0; .text; \
+			pushl %ebp; movl %esp,%ebp; \
+			movl $1b,%eax; call mcount; popl %ebp
+#else
+/*
+ * ALTENTRY() has to align because it is before a corresponding ENTRY().
+ * ENTRY() has to align to because there may be no ALTENTRY() before it.
+ * If there is a previous ALTENTRY() then the alignment code is empty.
+ */
+#define ALTENTRY(name)	GEN_ENTRY(_/**/name)
+#define ENTRY(name)	GEN_ENTRY(_/**/name)
+#define MCOUNT
+
+#endif
+
+#ifdef DUMMY_NOPS			/* this will break some older machines */
+#define FASTER_NOP
+#define NOP
+#else
+#define FASTER_NOP	pushl %eax ; inb $0x84,%al ; popl %eax
+#define NOP		pushl %eax ; inb $0x84,%al ; inb $0x84,%al ; popl %eax
+#endif
+
+#ifndef RCSID
+#define RCSID(a)
+#endif
+
+#endif	/* _ASMACROS_H_ */