mingwrt/profile/profile.h

   1 /*      $NetBSD: profile.h,v 1.6 1995/03/28 18:17:08 jtc Exp $  */
   2
   3 /*
   4  * Copyright (c) 1992, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. All advertising materials mentioning features or use of this software
  16  *    must display the following acknowledgement:
  17  *      This product includes software developed by the University of
  18  *      California, Berkeley and its contributors.
  19  * 4. Neither the name of the University nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  *
  35  *      @(#)profile.h   8.1 (Berkeley) 6/11/93
  36  */
  37
  38 /*
  39  * This file is taken from Cygwin distribution. Please keep it in sync.
  40  * The differences should be within __MINGW32__ guard.
  41  */
  42 /* If compiler doesn't inline, at least avoid passing args on the stack. */
  43 #define _MCOUNT_CALL __attribute__ ((regparm (2)))
  44 #define _MCOUNT_DECL static __inline__  void _MCOUNT_CALL _mcount
  45
  46 /* FIXME: This works, but it would be cleaner to convert mcount into an
  47    assembler stub that calls an extern  _mcount.
  48    Older versions of GCC (pre-4.1) will still fail with regparm since the
  49    compiler used %edx to store an unneeded counter variable.  */
  50
  51 #define MCOUNT \
  52 void                                                                    \
  53 mcount()                                                                \
  54 {                                                                       \
  55         u_long selfpc, frompcindex;                                     \
  56         /*                                                              \
  57          * Save registers, since this may be called from                \
  58          * the prologue of a regparm function.                          \
  59          */                                                             \
  60         __asm __volatile__ ("pushl %eax\n\t"                            \
  61                             "pushl %ecx\n\t"                            \
  62                             "pushl %edx");                              \
  63         /*                                                              \
  64          * find the return address for mcount,                          \
  65          * and the return address for mcount's caller.                  \
  66          *                                                              \
  67          * selfpc = pc pushed by mcount call                            \
  68          */                                                             \
  69         /* __asm  ("movl 4(%%ebp),%0" : "=r" (selfpc)); */              \
  70         selfpc = (u_long) __builtin_return_address (0);                 \
  71         /*                                                              \
  72          * frompcindex = pc pushed by call into self.                   \
  73          */                                                             \
  74         /*  __asm ("movl (%%ebp),%0;movl 4(%0),%0" : "=r" (frompcindex)); */  \
  75         frompcindex = (u_long) __builtin_return_address (1);            \
  76         _mcount(frompcindex, selfpc);                                   \
  77         /*                                                              \
  78          * Restore registers.                                           \
  79          */                                                             \
  80         __asm __volatile__ ("popl %edx\n\t"                             \
  81                             "popl %ecx\n\t"                             \
  82                             "popl %eax");                               \
  83 }