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 * $FreeBSD: src/sys/i386/include/profile.h,v 1.8.2.2 1999/09/05 08:11:59 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 #define MCOUNT_EXIT(s) (write_eflags(s))
67 #endif /* GUPROF */
68
69 #else /* !KERNEL */
70
71 #define FUNCTION_ALIGNMENT 4
72
73 #define _MCOUNT_DECL static __inline void _mcount
74
75 #define MCOUNT \
76 void \
77 mcount() \
78 { \
79 fptrint_t selfpc, frompc; \
80 /* \
81 * Find the return address for mcount, \
82 * and the return address for mcount's caller. \
83 * \
84 * selfpc = pc pushed by call to mcount \
85 */ \
86 asm("movl 4(%%ebp),%0" : "=r" (selfpc)); \
87 /* \
88 * frompc = pc pushed by call to mcount's caller. \
89 * The caller's stack frame has already been built, so %ebp is \
90 * the caller's frame pointer. The caller's raddr is in the \
91 * caller's frame following the caller's caller's frame pointer. \
92 */ \
93 asm("movl (%%ebp),%0" : "=r" (frompc)); \
94 frompc = ((fptrint_t *)frompc)[1]; \
95 _mcount(frompc, selfpc); \
96 }
97 #endif /* KERNEL */
98
99 /* An unsigned integral type that can hold function pointers. */
100 typedef u_int fptrint_t;
101
102 /*
103 * An unsigned integral type that can hold non-negative difference between
104 * function pointers.
105 */
106 typedef int fptrdiff_t;
107
108 #ifdef KERNEL
109
110 void mcount __P((fptrint_t frompc, fptrint_t selfpc));
111
112 #ifdef GUPROF
113 struct gmonparam;
114
115 void nullfunc_loop_profiled __P((void));
116 void nullfunc_profiled __P((void));
117 void startguprof __P((struct gmonparam *p));
118 void stopguprof __P((struct gmonparam *p));
119 #else
120 #define startguprof(p)
121 #define stopguprof(p)
122 #endif /* GUPROF */
123
124 #else /* !KERNEL */
125
126 #include <sys/cdefs.h>
127
128 __BEGIN_DECLS
129 void mcount __P((void)) __asm("mcount");
130 static void _mcount __P((fptrint_t frompc, fptrint_t selfpc));
131 __END_DECLS
132
133 #endif /* KERNEL */
134
135 #ifdef GUPROF
136 /* XXX doesn't quite work outside kernel yet. */
137 extern int cputime_bias;
138
139 __BEGIN_DECLS
140 int cputime __P((void));
141 void empty_loop __P((void));
142 void mexitcount __P((fptrint_t selfpc));
143 void nullfunc __P((void));
144 void nullfunc_loop __P((void));
145 __END_DECLS
146 #endif
147
148 #endif /* !_MACHINE_PROFILE_H_ */
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