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: releng/5.0/sys/i386/include/profile.h 103965 2002-09-25 13:46:23Z markm $
35 */
36
37 #ifndef _MACHINE_PROFILE_H_
38 #define _MACHINE_PROFILE_H_
39
40 #ifdef _KERNEL
41
42 /*
43 * Config generates something to tell the compiler to align functions on 16
44 * byte boundaries. A strict alignment is good for keeping the tables small.
45 */
46 #define FUNCTION_ALIGNMENT 16
47
48 /*
49 * The kernel uses assembler stubs instead of unportable inlines.
50 * This is mainly to save a little time when profiling is not enabled,
51 * which is the usual case for the kernel.
52 */
53 #define _MCOUNT_DECL void mcount
54 #define MCOUNT
55
56 #ifdef GUPROF
57 #define CALIB_SCALE 1000
58 #define KCOUNT(p,index) ((p)->kcount[(index) \
59 / (HISTFRACTION * sizeof(HISTCOUNTER))])
60 #define MCOUNT_DECL(s)
61 #define MCOUNT_ENTER(s)
62 #define MCOUNT_EXIT(s)
63 #define PC_TO_I(p, pc) ((uintfptr_t)(pc) - (uintfptr_t)(p)->lowpc)
64 #else
65 #define MCOUNT_DECL(s) u_long s;
66 #ifdef SMP
67 extern int mcount_lock;
68 #define MCOUNT_ENTER(s) { s = read_eflags(); disable_intr(); \
69 while (!atomic_cmpset_acq_int(&mcount_lock, 0, 1)) \
70 /* nothing */ ; }
71 #define MCOUNT_EXIT(s) { atomic_store_rel_int(&mcount_lock, 0); \
72 write_eflags(s); }
73 #else
74 #define MCOUNT_ENTER(s) { s = read_eflags(); disable_intr(); }
75 #define MCOUNT_EXIT(s) (write_eflags(s))
76 #endif
77 #endif /* GUPROF */
78
79 #else /* !_KERNEL */
80
81 #define FUNCTION_ALIGNMENT 4
82
83 #define _MCOUNT_DECL static __inline void _mcount
84
85 #ifdef __GNUC__
86 #define MCOUNT \
87 void \
88 mcount() \
89 { \
90 uintfptr_t selfpc, frompc; \
91 /* \
92 * Find the return address for mcount, \
93 * and the return address for mcount's caller. \
94 * \
95 * selfpc = pc pushed by call to mcount \
96 */ \
97 asm("movl 4(%%ebp),%0" : "=r" (selfpc)); \
98 /* \
99 * frompc = pc pushed by call to mcount's caller. \
100 * The caller's stack frame has already been built, so %ebp is \
101 * the caller's frame pointer. The caller's raddr is in the \
102 * caller's frame following the caller's caller's frame pointer.\
103 */ \
104 asm("movl (%%ebp),%0" : "=r" (frompc)); \
105 frompc = ((uintfptr_t *)frompc)[1]; \
106 _mcount(frompc, selfpc); \
107 }
108 #else /* __GNUC__ */
109 #define MCOUNT \
110 void \
111 mcount() \
112 { \
113 }
114 #endif /* __GNUC__ */
115
116 typedef unsigned int uintfptr_t;
117
118 #endif /* _KERNEL */
119
120 /*
121 * An unsigned integral type that can hold non-negative difference between
122 * function pointers.
123 */
124 typedef u_int fptrdiff_t;
125
126 #ifdef _KERNEL
127
128 void mcount(uintfptr_t frompc, uintfptr_t selfpc);
129 void kmupetext(uintfptr_t nhighpc);
130
131 #ifdef GUPROF
132 struct gmonparam;
133
134 void nullfunc_loop_profiled(void);
135 void nullfunc_profiled(void);
136 void startguprof(struct gmonparam *p);
137 void stopguprof(struct gmonparam *p);
138 #else
139 #define startguprof(p)
140 #define stopguprof(p)
141 #endif /* GUPROF */
142
143 #else /* !_KERNEL */
144
145 #include <sys/cdefs.h>
146
147 __BEGIN_DECLS
148 #ifdef __GNUC__
149 void mcount(void) __asm(".mcount");
150 #endif
151 static void _mcount(uintfptr_t frompc, uintfptr_t selfpc);
152 __END_DECLS
153
154 #endif /* _KERNEL */
155
156 #ifdef GUPROF
157 /* XXX doesn't quite work outside kernel yet. */
158 extern int cputime_bias;
159
160 __BEGIN_DECLS
161 int cputime(void);
162 void empty_loop(void);
163 void mexitcount(uintfptr_t selfpc);
164 void nullfunc(void);
165 void nullfunc_loop(void);
166 __END_DECLS
167 #endif
168
169 #endif /* !_MACHINE_PROFILE_H_ */
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