1/* $OpenBSD: profile.h,v 1.12 2014/03/29 18:09:29 guenther 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 \
38extern void mcount(void) __asm("__mcount"); \
39__weak_alias(mcount,__mcount); \
40void \
41mcount(void) \
42{ \
43 int selfpc, frompcindex; \
44 int eax, ecx, edx; \
45 \
46 __asm volatile("movl %%eax,%0" : "=g" (eax)); \
47 __asm volatile("movl %%ecx,%0" : "=g" (ecx)); \
48 __asm volatile("movl %%edx,%0" : "=g" (edx)); \
49 /* \
50 * find the return address for mcount, \
51 * and the return address for mcount's caller. \
52 * \
53 * selfpc = pc pushed by mcount call \
54 */ \
55 __asm volatile ("movl 4(%%ebp),%0" : "=r" (selfpc)); \
56 /* \
57 * frompcindex = pc pushed by call into self. \
58 */ \
59 __asm volatile ("movl (%%ebp),%0;movl 4(%0),%0" : \
60 "+r" (frompcindex)); \
61 _mcount(frompcindex, selfpc); \
62 \
63 __asm volatile("movl %0,%%edx" : : "g" (edx)); \
64 __asm volatile("movl %0,%%ecx" : : "g" (ecx)); \
65 __asm volatile("movl %0,%%eax" : : "g" (eax)); \
66}
67
68#ifdef _KERNEL
69/*
70 * We inline the code that splhigh and splx would do here as otherwise we would
71 * call recursively into mcount() as machdep.c is compiled with -pg on a
72 * profiling build.
73 */
74#define MCOUNT_ENTER _SPLRAISE(s, IPL_HIGH); __splbarrier()
75#define MCOUNT_EXIT __splbarrier(); _SPLX(s)
76#endif /* _KERNEL */