2 * Copyright (c) 1992, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
33 * @(#)profile.h 8.1 (Berkeley) 6/11/93
34 * $FreeBSD: src/sys/i386/include/profile.h,v 1.20 1999/12/29 04:33:05 peter Exp $
37 #ifndef _CPU_PROFILE_H_
38 #define _CPU_PROFILE_H_
41 #include <sys/cdefs.h>
44 #include <sys/types.h>
50 * Config generates something to tell the compiler to align functions on 16
51 * byte boundaries. A strict alignment is good for keeping the tables small.
53 #define FUNCTION_ALIGNMENT 16
56 * The kernel uses assembler stubs instead of unportable inlines.
57 * This is mainly to save a little time when profiling is not enabled,
58 * which is the usual case for the kernel.
60 #define _MCOUNT_DECL void mcount
64 #define CALIB_SCALE 1000
65 #define KCOUNT(p,index) ((p)->kcount[(index) \
66 / (HISTFRACTION * sizeof(HISTCOUNTER))])
67 #define MCOUNT_DECL(s)
68 #define MCOUNT_ENTER(s)
69 #define MCOUNT_EXIT(s)
70 #define PC_TO_I(p, pc) ((uintfptr_t)(pc) - (uintfptr_t)(p)->lowpc)
72 #define MCOUNT_DECL(s) u_long s;
73 struct spinlock_deprecated;
74 extern struct spinlock_deprecated mcount_spinlock;
75 void spin_lock_np(struct spinlock_deprecated *sp);
76 void spin_unlock_np(struct spinlock_deprecated *sp);
77 #define MCOUNT_ENTER(s) { s = read_eflags(); \
78 __asm __volatile("cli" : : : "memory"); \
79 spin_lock_np(&mcount_spinlock); }
80 #define MCOUNT_EXIT(s) { spin_unlock_np(&mcount_spinlock); write_eflags(s); }
85 #define FUNCTION_ALIGNMENT 4
87 #define _MCOUNT_DECL static __inline void _mcount
93 register int c asm("ecx"); \
94 register int d asm("edx"); \
95 register int a asm("eax"); \
96 uintfptr_t selfpc, frompc; \
98 * mcount can't trash any registers, but _mcount \
99 * follows the i386 abi and considers eax, ecx and \
100 * edx caller-saved. We're the caller, so save them \
103 asm("push %%ecx" : : "r" (c) : "memory"); \
104 asm("push %%edx" : : "r" (d): "memory"); \
105 asm("push %%eax" : : "r" (a) : "memory"); \
107 * Find the return address for mcount, \
108 * and the return address for mcount's caller. \
110 * selfpc = pc pushed by call to mcount \
112 asm("movl 4(%%ebp),%0" : "=r" (selfpc)); \
114 * frompc = pc pushed by call to mcount's caller. \
115 * The caller's stack frame has already been built, so %ebp is \
116 * the caller's frame pointer. The caller's raddr is in the \
117 * caller's frame following the caller's caller's frame pointer. \
119 asm("movl (%%ebp),%0" : "=r" (frompc)); \
120 frompc = ((uintfptr_t *)frompc)[1]; \
121 _mcount(frompc, selfpc); \
122 /* restore the registers that _mcount possibly trashed */ \
123 asm volatile ("pop %%eax" : "=r" (a) : ); \
124 asm volatile ("pop %%edx" : "=r" (d) : ); \
125 asm volatile ("pop %%ecx" : "=r" (c) : ); \
128 typedef unsigned int uintfptr_t;
133 * An unsigned integral type that can hold non-negative difference between
136 typedef u_int fptrdiff_t;
140 void mcount (uintfptr_t frompc, uintfptr_t selfpc);
145 void nullfunc_loop_profiled (void);
146 void nullfunc_profiled (void);
147 void startguprof (struct gmonparam *p);
148 void stopguprof (struct gmonparam *p);
150 #define startguprof(p)
151 #define stopguprof(p)
158 void mcount (void) __asm(".mcount");
160 /*static void _mcount (uintfptr_t frompc, uintfptr_t selfpc);*/
166 /* XXX doesn't quite work outside kernel yet. */
167 extern int cputime_bias;
171 void empty_loop (void);
172 void mexitcount (uintfptr_t selfpc);
173 void nullfunc (void);
174 void nullfunc_loop (void);
178 #endif /* !_CPU_PROFILE_H_ */