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profile.h revision 1.14 
      1 /*	$NetBSD: profile.h,v 1.14 2000/01/22 22:46:56 mycroft 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 #ifdef __ELF__
     41 #define MCOUNT_ENTRY	"__mcount"
     42 #define MCOUNT_COMPAT	__weak_alias(mcount, __mcount)
     43 #else
     44 #define MCOUNT_ENTRY	"mcount"
     45 #define MCOUNT_COMPAT	/* nothing */
     46 #endif
     47 
     48 #define	MCOUNT \
     49 MCOUNT_COMPAT								\
     50 extern void mcount __P((void)) __asm__(MCOUNT_ENTRY);			\
     51 void									\
     52 mcount()								\
     53 {									\
     54 	int selfpc, frompcindex;					\
     55 	/*								\
     56 	 * find the return address for mcount,				\
     57 	 * and the return address for mcount's caller.			\
     58 	 *								\
     59 	 * selfpc = pc pushed by mcount call				\
     60 	 */								\
     61 	__asm__("movl 4(%%ebp),%0" : "=r" (selfpc));			\
     62 	/*								\
     63 	 * frompcindex = pc pushed by call into self.			\
     64 	 */								\
     65 	__asm__("movl (%%ebp),%0;movl 4(%0),%0" : "=r" (frompcindex));	\
     66 	_mcount((u_long)frompcindex, (u_long)selfpc);			\
     67 }
     68 
     69 #ifdef _KERNEL
     70 /*
     71  * Note that we assume splhigh() and splx() cannot call mcount()
     72  * recursively.
     73  */
     74 #define	MCOUNT_ENTER	s = splhigh()
     75 #define	MCOUNT_EXIT	splx(s)
     76 #endif /* _KERNEL */
     77