Annotation of sys/arch/i386/include/profile.h, Revision 1.1.1.1
1.1 nbrk 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 */
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