/*      $OpenBSD: profile.h,v 1.12 2014/03/29 18:09:29 guenther Exp $   */
/*      $NetBSD: profile.h,v 1.6 1995/03/28 18:17:08 jtc Exp $  */

/*
 * Copyright (c) 1992, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *      @(#)profile.h   8.1 (Berkeley) 6/11/93
 */

#define _MCOUNT_DECL static __inline void _mcount

#define MCOUNT \
extern void mcount(void) __asm("__mcount");                             \
__weak_alias(mcount,__mcount);                                          \
void                                                                    \
mcount(void)                                                            \
{                                                                       \
        int selfpc, frompcindex;                                        \
        int eax, ecx, edx;                                              \
                                                                        \
        __asm volatile("movl %%eax,%0" : "=g" (eax));                   \
        __asm volatile("movl %%ecx,%0" : "=g" (ecx));                   \
        __asm volatile("movl %%edx,%0" : "=g" (edx));                   \
        /*                                                              \
         * find the return address for mcount,                          \
         * and the return address for mcount's caller.                  \
         *                                                              \
         * selfpc = pc pushed by mcount call                            \
         */                                                             \
        __asm volatile ("movl 4(%%ebp),%0" : "=r" (selfpc));            \
        /*                                                              \
         * frompcindex = pc pushed by call into self.                   \
         */                                                             \
        __asm volatile ("movl (%%ebp),%0;movl 4(%0),%0" :               \
            "+r" (frompcindex));                                        \
        _mcount(frompcindex, selfpc);                                   \
                                                                        \
        __asm volatile("movl %0,%%edx" : : "g" (edx));                  \
        __asm volatile("movl %0,%%ecx" : : "g" (ecx));                  \
        __asm volatile("movl %0,%%eax" : : "g" (eax));                  \
}

#ifdef _KERNEL
/*
 * We inline the code that splhigh and splx would do here as otherwise we would
 * call recursively into mcount() as machdep.c is compiled with -pg on a 
 * profiling build.
 */
#define MCOUNT_ENTER    _SPLRAISE(s, IPL_HIGH); __splbarrier()
#define MCOUNT_EXIT     __splbarrier(); _SPLX(s)
#endif /* _KERNEL */