profile.h revision 28921
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 1.11 1997/02/22 09:35:01 peter Exp $
35 */
36
37#ifndef _MACHINE_PROFILE_H_
38#define	_MACHINE_PROFILE_H_
39
40#ifdef KERNEL
41/*
42 * Config generates something to tell the compiler to align functions on 16
43 * byte boundaries.  A strict alignment is good for keeping the tables small.
44 */
45#define	FUNCTION_ALIGNMENT	16
46
47/*
48 * The kernel uses assembler stubs instead of unportable inlines.
49 * This is mainly to save a little time when profiling is not enabled,
50 * which is the usual case for the kernel.
51 */
52#define	_MCOUNT_DECL void mcount
53#define	MCOUNT
54
55#ifdef GUPROF
56#define	CALIB_SCALE	1000
57#define	KCOUNT(p,index)	((p)->kcount[(index) \
58			 / (HISTFRACTION * sizeof(HISTCOUNTER))])
59#define	MCOUNT_DECL(s)
60#define	MCOUNT_ENTER(s)
61#define	MCOUNT_EXIT(s)
62#define	PC_TO_I(p, pc)	((fptrint_t)(pc) - (fptrint_t)(p)->lowpc)
63#else
64#define	MCOUNT_DECL(s)	u_long s;
65#define	MCOUNT_ENTER(s)	{ s = read_eflags(); disable_intr(); }
66#ifdef SMP
67#define	MCOUNT_EXIT(s)	{ MPINTR_UNLOCK(); write_eflags(s); }
68#else
69#define	MCOUNT_EXIT(s)	(write_eflags(s))
70#endif
71#endif /* GUPROF */
72
73#else /* !KERNEL */
74
75#define	FUNCTION_ALIGNMENT	4
76
77#define	_MCOUNT_DECL static __inline void _mcount
78
79#define	MCOUNT \
80void \
81mcount() \
82{ \
83	fptrint_t selfpc, frompc; \
84	/* \
85	 * Find the return address for mcount, \
86	 * and the return address for mcount's caller. \
87	 * \
88	 * selfpc = pc pushed by call to mcount \
89	 */ \
90	asm("movl 4(%%ebp),%0" : "=r" (selfpc)); \
91	/* \
92	 * frompc = pc pushed by call to mcount's caller. \
93	 * The caller's stack frame has already been built, so %ebp is \
94	 * the caller's frame pointer.  The caller's raddr is in the \
95	 * caller's frame following the caller's caller's frame pointer. \
96	 */ \
97	asm("movl (%%ebp),%0" : "=r" (frompc)); \
98	frompc = ((fptrint_t *)frompc)[1]; \
99	_mcount(frompc, selfpc); \
100}
101#endif /* KERNEL */
102
103/* An unsigned integral type that can hold function pointers. */
104typedef	u_int	fptrint_t;
105
106/*
107 * An unsigned integral type that can hold non-negative difference between
108 * function pointers.
109 */
110typedef	int	fptrdiff_t;
111
112#ifdef KERNEL
113
114void	mcount __P((fptrint_t frompc, fptrint_t selfpc));
115
116#ifdef GUPROF
117struct gmonparam;
118
119void	nullfunc_loop_profiled __P((void));
120void	nullfunc_profiled __P((void));
121void	startguprof __P((struct gmonparam *p));
122void	stopguprof __P((struct gmonparam *p));
123#else
124#define	startguprof(p)
125#define	stopguprof(p)
126#endif /* GUPROF */
127
128#else /* !KERNEL */
129
130#include <sys/cdefs.h>
131
132__BEGIN_DECLS
133void	mcount __P((void)) __asm("mcount");
134static void	_mcount __P((fptrint_t frompc, fptrint_t selfpc));
135__END_DECLS
136
137#endif /* KERNEL */
138
139#ifdef GUPROF
140/* XXX doesn't quite work outside kernel yet. */
141extern int	cputime_bias;
142
143__BEGIN_DECLS
144int	cputime __P((void));
145void	empty_loop __P((void));
146void	mexitcount __P((fptrint_t selfpc));
147void	nullfunc __P((void));
148void	nullfunc_loop __P((void));
149__END_DECLS
150#endif
151
152#endif /* !_MACHINE_PROFILE_H_ */
153