1 /* $OpenBSD: profile.h,v 1.10 2005/01/07 02:03:17 pascoe Exp $ */
2 /* $NetBSD: profile.h,v 1.6 1995/03/28 18:17:08 jtc Exp $ */
3
4 /*
5 * Copyright (c) 1992, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * @(#)profile.h 8.1 (Berkeley) 6/11/93
33 */
34
35 #define _MCOUNT_DECL static __inline void _mcount
36
37 #define MCOUNT \
38 extern void mcount(void) __asm("__mcount"); \
39 __weak_alias(mcount,__mcount); \
40 void \
41 mcount() \
42 { \
43 int selfpc, frompcindex; \
44 /* \
45 * find the return address for mcount, \
46 * and the return address for mcount's caller. \
47 * \
48 * selfpc = pc pushed by mcount call \
49 */ \
50 __asm __volatile ("movl 4(%%ebp),%0" : "=r" (selfpc)); \
51 /* \
52 * frompcindex = pc pushed by call into self. \
53 */ \
54 __asm __volatile ("movl (%%ebp),%0;movl 4(%0),%0" : \
55 "+r" (frompcindex)); \
56 _mcount(frompcindex, selfpc); \
57 }
58
59 #ifdef _KERNEL
60 /*
61 * We inline the code that splhigh and splx would do here as otherwise we would
62 * call recursively into mcount() as machdep.c is compiled with -pg on a
63 * profiling build.
64 */
65 #define MCOUNT_ENTER _SPLRAISE(s, IPL_HIGH); __splbarrier()
66 #define MCOUNT_EXIT __splbarrier(); _SPLX(s)
67 #endif /* _KERNEL */