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profile.h revision 1.9 
      1 /*      $NetBSD: profile.h,v 1.9 2003/08/07 16:30:11 agc Exp $ */
      2 /*
      3  * Copyright (c) 1992 The Regents of the University of California.
      4  * All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  * 3. Neither the name of the University nor the names of its contributors
     15  *    may be used to endorse or promote products derived from this software
     16  *    without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     28  * SUCH DAMAGE.
     29  *
     30  *      @(#)profile.h   7.1 (Berkeley) 7/16/92
     31  */
     32 
     33 /*
     34  * _mcount can't be declared static, gcc will optimize it away then.
     35  */
     36 #define _MCOUNT_DECL void _mcount
     37 
     38 /*
     39  * Note here: the second argument to __mcount() is pc when mcount
     40  * was called. Because it's already on the stack we only have to
     41  * push previous pc _and_ tell calls that it is only one argument
     42  * to __mcount, so that our return address won't get popped from stack.
     43  */
     44 #ifdef __ELF__
     45 #define MCOUNT \
     46 __asm__(".text; .globl __mcount; __mcount: pushl 16(%fp); calls $1,_mcount; rsb");
     47 #else
     48 #define MCOUNT \
     49 __asm__(".text; .globl mcount; mcount: pushl 16(%fp); calls $1,__mcount; rsb");
     50 #endif
     51 
     52 #ifdef _KERNEL
     53 /*
     54  * Note that we assume splhigh() and splx() cannot call mcount()
     55  * recursively.
     56  */
     57 #define MCOUNT_ENTER    s = splhigh()
     58 #define MCOUNT_EXIT     splx(s)
     59 #endif /* _KERNEL */
     60