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profile.h revision 1.18 
      1 /*	$NetBSD: profile.h,v 1.18 2003/10/27 13:44:20 junyoung 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. Neither the name of the University nor the names of its contributors
     16  *    may be used to endorse or promote products derived from this software
     17  *    without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  *
     31  *	@(#)profile.h	8.1 (Berkeley) 6/11/93
     32  */
     33 
     34 #define	_MCOUNT_DECL static __inline void _mcount
     35 
     36 #ifdef __ELF__
     37 #define MCOUNT_ENTRY	"__mcount"
     38 #define MCOUNT_COMPAT	__weak_alias(mcount, __mcount)
     39 #else
     40 #define MCOUNT_ENTRY	"mcount"
     41 #define MCOUNT_COMPAT	/* nothing */
     42 #endif
     43 
     44 #define	MCOUNT \
     45 MCOUNT_COMPAT								\
     46 extern void mcount(void) __asm__(MCOUNT_ENTRY);			\
     47 void									\
     48 mcount()								\
     49 {									\
     50 	int selfpc, frompcindex;					\
     51 	/*								\
     52 	 * find the return address for mcount,				\
     53 	 * and the return address for mcount's caller.			\
     54 	 *								\
     55 	 * selfpc = pc pushed by mcount call				\
     56 	 */								\
     57 	__asm__ __volatile__("movl 4(%%ebp),%0" : "=r" (selfpc));	\
     58 	/*								\
     59 	 * frompcindex = pc pushed by call into self.			\
     60 	 */								\
     61 	__asm__ __volatile__("movl (%%ebp),%0;movl 4(%0),%0"		\
     62 	    : "=r" (frompcindex));					\
     63 	_mcount((u_long)frompcindex, (u_long)selfpc);			\
     64 }
     65 
     66 #ifdef _KERNEL
     67 #define	MCOUNT_ENTER	(void)&s; __asm__("cli");
     68 #define	MCOUNT_EXIT	__asm__("sti");
     69 #endif /* _KERNEL */
     70