profile.h revision 2166 
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 *	@(#)profile.h	8.1 (Berkeley) 6/11/93
34 * $Id: profile.h,v 1.2 1994/08/02 07:38:56 davidg Exp $
35 */
36
37#ifndef _I386_MACHINE_PROFILE_H_
38#define _I386_MACHINE_PROFILE_H_
39
40#define	_MCOUNT_DECL static inline void _mcount
41
42#define	MCOUNT \
43extern void mcount() asm("mcount"); void mcount() { \
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 jsr into self. \
54	 * In GCC the caller's stack frame has already been built so we \
55	 * have to chase a6 to find caller's raddr. \
56	 */ \
57	asm("movl (%%ebp),%0" : "=r" (frompcindex)); \
58	frompcindex = ((int *)frompcindex)[1]; \
59	_mcount(frompcindex, selfpc); \
60}
61
62#endif
63