sys/cpu/x86_64/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. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  *      @(#)profile.h   8.1 (Berkeley) 6/11/93
  30  * $FreeBSD: src/sys/amd64/include/profile.h,v 1.33 2004/01/06 20:36:21 nectar Exp $
  31  */
  32
  33 #ifndef _CPU_PROFILE_H_
  34 #define _CPU_PROFILE_H_
  35
  36 #ifdef _KERNEL
  37
  38 /*
  39  * Config generates something to tell the compiler to align functions on 16
  40  * byte boundaries.  A strict alignment is good for keeping the tables small.
  41  */
  42 #define FUNCTION_ALIGNMENT      16
  43
  44 /*
  45  * The kernel uses assembler stubs instead of unportable inlines.
  46  * This is mainly to save a little time when profiling is not enabled,
  47  * which is the usual case for the kernel.
  48  */
  49 #define _MCOUNT_DECL void mcount
  50 #define MCOUNT
  51
  52 #ifdef GUPROF
  53 #define CALIB_SCALE     1000
  54 #define KCOUNT(p,index) ((p)->kcount[(index) \
  55                          / (HISTFRACTION * sizeof(HISTCOUNTER))])
  56 #define MCOUNT_DECL(s)
  57 #define MCOUNT_ENTER(s)
  58 #define MCOUNT_EXIT(s)
  59 #define PC_TO_I(p, pc)  ((uintfptr_t)(pc) - (uintfptr_t)(p)->lowpc)
  60 #else
  61 #define MCOUNT_DECL(s)  u_long s;
  62 extern int      mcount_lock;
  63 #define MCOUNT_ENTER(s) { s = read_rflags(); disable_intr(); \
  64                           while (!atomic_cmpset_acq_int(&mcount_lock, 0, 1)) \
  65                                 /* nothing */ ; }
  66 #define MCOUNT_EXIT(s)  { atomic_store_rel_int(&mcount_lock, 0); \
  67                           write_rflags(s); }
  68 #endif /* GUPROF */
  69
  70 #else /* !_KERNEL */
  71
  72 #define FUNCTION_ALIGNMENT      4
  73
  74 #define _MCOUNT_DECL \
  75 static void _mcount(uintfptr_t frompc, uintfptr_t selfpc) __used; \
  76 static void _mcount
  77
  78 #ifdef  __GNUC__
  79 #define MCOUNT __asm("                  \n\
  80         .text                           \n\
  81         .p2align 4,0x90                 \n\
  82         .globl  .mcount                 \n\
  83         .type   .mcount,@function       \n\
  84 .mcount:                                \n\
  85         pushq   %rdi                    \n\
  86         pushq   %rsi                    \n\
  87         pushq   %rdx                    \n\
  88         pushq   %rcx                    \n\
  89         pushq   %r8                     \n\
  90         pushq   %r9                     \n\
  91         pushq   %rax                    \n\
  92         movq    8(%rbp),%rdi            \n\
  93         movq    7*8(%rsp),%rsi          \n\
  94         call    _mcount                 \n\
  95         popq    %rax                    \n\
  96         popq    %r9                     \n\
  97         popq    %r8                     \n\
  98         popq    %rcx                    \n\
  99         popq    %rdx                    \n\
 100         popq    %rsi                    \n\
 101         popq    %rdi                    \n\
 102         ret                             \n\
 103         .size   .mcount, . - .mcount");
 104 #else   /* __GNUC__ */
 105 #define MCOUNT          \
 106 void                    \
 107 mcount()                \
 108 {                       \
 109 }
 110 #endif  /* __GNUC__ */
 111
 112 typedef unsigned long   uintfptr_t;
 113
 114 #endif /* _KERNEL */
 115
 116 /*
 117  * An unsigned integral type that can hold non-negative difference between
 118  * function pointers.
 119  */
 120 typedef unsigned long   fptrdiff_t;
 121
 122 #ifdef _KERNEL
 123
 124 void    mcount(uintfptr_t frompc, uintfptr_t selfpc);
 125 void    kmupetext(uintfptr_t nhighpc);
 126
 127 #ifdef GUPROF
 128 struct gmonparam;
 129
 130 void    nullfunc_loop_profiled(void);
 131 void    nullfunc_profiled(void);
 132 void    startguprof(struct gmonparam *p);
 133 void    stopguprof(struct gmonparam *p);
 134 #else
 135 #define startguprof(p)
 136 #define stopguprof(p)
 137 #endif /* GUPROF */
 138
 139 #else /* !_KERNEL */
 140
 141 #include <sys/cdefs.h>
 142
 143 __BEGIN_DECLS
 144 #ifdef __GNUC__
 145 void    mcount(void) __asm(".mcount");
 146 #endif
 147 __END_DECLS
 148
 149 #endif /* _KERNEL */
 150
 151 #ifdef GUPROF
 152 /* XXX doesn't quite work outside kernel yet. */
 153 extern int      cputime_bias;
 154
 155 __BEGIN_DECLS
 156 int     cputime(void);
 157 void    empty_loop(void);
 158 void    mexitcount(uintfptr_t selfpc);
 159 void    nullfunc(void);
 160 void    nullfunc_loop(void);
 161 __END_DECLS
 162 #endif
 163
 164 #endif /* !_CPU_PROFILE_H_ */