sys/i386/include/profile.h

   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 1.20 1999/12/29 04:33:05 peter Exp $
  35  * $DragonFly: src/sys/i386/include/Attic/profile.h,v 1.5 2004/03/20 16:27:41 drhodus Exp $
  36  */
  37
  38 #ifndef _MACHINE_PROFILE_H_
  39 #define _MACHINE_PROFILE_H_
  40
  41 #ifdef _KERNEL
  42
  43 /*
  44  * Config generates something to tell the compiler to align functions on 16
  45  * byte boundaries.  A strict alignment is good for keeping the tables small.
  46  */
  47 #define FUNCTION_ALIGNMENT      16
  48
  49 /*
  50  * The kernel uses assembler stubs instead of unportable inlines.
  51  * This is mainly to save a little time when profiling is not enabled,
  52  * which is the usual case for the kernel.
  53  */
  54 #define _MCOUNT_DECL void mcount
  55 #define MCOUNT
  56
  57 #ifdef GUPROF
  58 #define CALIB_SCALE     1000
  59 #define KCOUNT(p,index) ((p)->kcount[(index) \
  60                          / (HISTFRACTION * sizeof(HISTCOUNTER))])
  61 #define MCOUNT_DECL(s)
  62 #define MCOUNT_ENTER(s)
  63 #define MCOUNT_EXIT(s)
  64 #define PC_TO_I(p, pc)  ((uintfptr_t)(pc) - (uintfptr_t)(p)->lowpc)
  65 #else
  66 #define MCOUNT_DECL(s)  u_long s;
  67 #ifdef SMP
  68 #define MCOUNT_ENTER(s) { s = read_eflags(); \
  69                           __asm __volatile("cli" : : : "memory"); \
  70                           s_lock_np(&mcount_lock); }
  71 #define MCOUNT_EXIT(s)  { s_unlock_np(&mcount_lock); write_eflags(s); }
  72 #else
  73 #define MCOUNT_ENTER(s) { s = read_eflags(); cpu_disable_intr(); }
  74 #define MCOUNT_EXIT(s)  (write_eflags(s))
  75 #endif
  76 #endif /* GUPROF */
  77
  78 #else /* !_KERNEL */
  79
  80 #define FUNCTION_ALIGNMENT      4
  81
  82 #define _MCOUNT_DECL static __inline void _mcount
  83
  84 #define MCOUNT \
  85 void \
  86 mcount() \
  87 { \
  88         uintfptr_t selfpc, frompc; \
  89         /* \
  90          * Find the return address for mcount, \
  91          * and the return address for mcount's caller. \
  92          * \
  93          * selfpc = pc pushed by call to mcount \
  94          */ \
  95         asm("movl 4(%%ebp),%0" : "=r" (selfpc)); \
  96         /* \
  97          * frompc = pc pushed by call to mcount's caller. \
  98          * The caller's stack frame has already been built, so %ebp is \
  99          * the caller's frame pointer.  The caller's raddr is in the \
 100          * caller's frame following the caller's caller's frame pointer. \
 101          */ \
 102         asm("movl (%%ebp),%0" : "=r" (frompc)); \
 103         frompc = ((uintfptr_t *)frompc)[1]; \
 104         _mcount(frompc, selfpc); \
 105 }
 106
 107 typedef unsigned int    uintfptr_t;
 108
 109 #endif /* _KERNEL */
 110
 111 /*
 112  * An unsigned integral type that can hold non-negative difference between
 113  * function pointers.
 114  */
 115 typedef u_int   fptrdiff_t;
 116
 117 #ifdef _KERNEL
 118
 119 void    mcount (uintfptr_t frompc, uintfptr_t selfpc);
 120
 121 #ifdef GUPROF
 122 struct gmonparam;
 123
 124 void    nullfunc_loop_profiled (void);
 125 void    nullfunc_profiled (void);
 126 void    startguprof (struct gmonparam *p);
 127 void    stopguprof (struct gmonparam *p);
 128 #else
 129 #define startguprof(p)
 130 #define stopguprof(p)
 131 #endif /* GUPROF */
 132
 133 #else /* !_KERNEL */
 134
 135 #include <sys/cdefs.h>
 136
 137 __BEGIN_DECLS
 138 #ifdef __GNUC__
 139 void    mcount (void) __asm(".mcount");
 140 #endif
 141 static void     _mcount (uintfptr_t frompc, uintfptr_t selfpc);
 142 __END_DECLS
 143
 144 #endif /* _KERNEL */
 145
 146 #ifdef GUPROF
 147 /* XXX doesn't quite work outside kernel yet. */
 148 extern int      cputime_bias;
 149
 150 __BEGIN_DECLS
 151 int     cputime (void);
 152 void    empty_loop (void);
 153 void    mexitcount (uintfptr_t selfpc);
 154 void    nullfunc (void);
 155 void    nullfunc_loop (void);
 156 __END_DECLS
 157 #endif
 158
 159 #endif /* !_MACHINE_PROFILE_H_ */