Home | History | Annotate | Line # | Download | only in include
profile.h revision 1.4 
      1 /*
      2  * Copyright (c) 1992, 1993
      3  *	The Regents of the University of California.  All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  * 3. All advertising materials mentioning features or use of this software
     14  *    must display the following acknowledgement:
     15  *	This product includes software developed by the University of
     16  *	California, Berkeley and its contributors.
     17  * 4. Neither the name of the University nor the names of its contributors
     18  *    may be used to endorse or promote products derived from this software
     19  *    without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  * SUCH DAMAGE.
     32  *
     33  *	from: @(#)profile.h	8.1 (Berkeley) 6/11/93
     34  *	$Id: profile.h,v 1.4 1994/05/13 11:12:38 mycroft Exp $
     35  */
     36 
     37 #define	_MCOUNT_DECL static inline void _mcount
     38 
     39 #define	MCOUNT \
     40 extern void mcount() asm("mcount");					\
     41 void									\
     42 mcount()								\
     43 {									\
     44 	int selfpc, frompcindex;					\
     45 	/*								\
     46 	 * find the return address for mcount,				\
     47 	 * and the return address for mcount's caller.			\
     48 	 *								\
     49 	 * selfpc = pc pushed by mcount call				\
     50 	 */								\
     51 	asm("movl 4(%%ebp),%0" : "=r" (selfpc));			\
     52 	/*								\
     53 	 * frompcindex = pc pushed by call into self.			\
     54 	 */								\
     55 	asm("movl (%%ebp),%0;movl 4(%0),%0" : "=r" (frompcindex));	\
     56 	_mcount(frompcindex, selfpc);					\
     57 }
     58 
     59 #ifdef KERNEL
     60 /*
     61  * Note that we assume splhigh() and splx() cannot call mcount()
     62  * recursively.
     63  */
     64 #define	MCOUNT_ENTER	s = splhigh()
     65 #define	MCOUNT_EXIT	splx(s)
     66 #endif /* KERNEL */
     67