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profile.h revision 1.5 
      1 /*	$NetBSD: profile.h,v 1.5 1994/10/27 04:16:19 cgd Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1992, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      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  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  *
     35  *	@(#)profile.h	8.1 (Berkeley) 6/11/93
     36  */
     37 
     38 #define	_MCOUNT_DECL static inline void _mcount
     39 
     40 #define	MCOUNT \
     41 extern void mcount() asm("mcount");					\
     42 void									\
     43 mcount()								\
     44 {									\
     45 	int selfpc, frompcindex;					\
     46 	/*								\
     47 	 * find the return address for mcount,				\
     48 	 * and the return address for mcount's caller.			\
     49 	 *								\
     50 	 * selfpc = pc pushed by mcount call				\
     51 	 */								\
     52 	asm("movl 4(%%ebp),%0" : "=r" (selfpc));			\
     53 	/*								\
     54 	 * frompcindex = pc pushed by call into self.			\
     55 	 */								\
     56 	asm("movl (%%ebp),%0;movl 4(%0),%0" : "=r" (frompcindex));	\
     57 	_mcount(frompcindex, selfpc);					\
     58 }
     59 
     60 #ifdef KERNEL
     61 /*
     62  * Note that we assume splhigh() and splx() cannot call mcount()
     63  * recursively.
     64  */
     65 #define	MCOUNT_ENTER	s = splhigh()
     66 #define	MCOUNT_EXIT	splx(s)
     67 #endif /* KERNEL */
     68