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diff --git a/gprof/gmon.h b/gprof/gmon.h
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+/*-
+ * Copyright (c) 1991 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.
+ *
+ *	@(#)gmon.h	5.2 (Berkeley) 5/6/91
+ */
+
+struct phdr {
+    char	*lpc;
+    char	*hpc;
+    int		ncnt;
+};
+
+    /*
+     *	histogram counters are unsigned shorts (according to the kernel).
+     */
+#define	HISTCOUNTER	unsigned short
+
+    /*
+     *	fraction of text space to allocate for histogram counters
+     *	here, 1/2
+     */
+#define	HISTFRACTION	2
+
+    /*
+     *	Fraction of text space to allocate for from hash buckets.
+     *	The value of HASHFRACTION is based on the minimum number of bytes
+     *	of separation between two subroutine call points in the object code.
+     *	Given MIN_SUBR_SEPARATION bytes of separation the value of
+     *	HASHFRACTION is calculated as:
+     *
+     *		HASHFRACTION = MIN_SUBR_SEPARATION / (2 * sizeof(short) - 1);
+     *
+     *	For the VAX, the shortest two call sequence is:
+     *
+     *		calls	$0,(r0)
+     *		calls	$0,(r0)
+     *
+     *	which is separated by only three bytes, thus HASHFRACTION is 
+     *	calculated as:
+     *
+     *		HASHFRACTION = 3 / (2 * 2 - 1) = 1
+     *
+     *	Note that the division above rounds down, thus if MIN_SUBR_FRACTION
+     *	is less than three, this algorithm will not work!
+     */
+#define	HASHFRACTION	1
+
+    /*
+     *	percent of text space to allocate for tostructs
+     *	with a minimum.
+     */
+#define ARCDENSITY	2
+#define MINARCS		50
+
+struct tostruct {
+    char		*selfpc;
+    long		count;
+    unsigned short	link;
+};
+
+    /*
+     *	a raw arc,
+     *	    with pointers to the calling site and the called site
+     *	    and a count.
+     */
+struct rawarc {
+    unsigned long	raw_frompc;
+    unsigned long	raw_selfpc;
+    long		raw_count;
+};
+
+    /*
+     *	general rounding functions.
+     */
+#define ROUNDDOWN(x,y)	(((x)/(y))*(y))
+#define ROUNDUP(x,y)	((((x)+(y)-1)/(y))*(y))