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Annotation of src/sys/arch/i386/include/profile.h, Revision 1.9

1.9     ! fvdl        1: /*     $NetBSD: profile.h,v 1.8 1996/12/05 10:21:09 fvdl Exp $ */
1.5       cgd         2:
1.1       mycroft     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:  *
1.5       cgd        35:  *     @(#)profile.h   8.1 (Berkeley) 6/11/93
1.1       mycroft    36:  */
                     37:
                     38: #define        _MCOUNT_DECL static inline void _mcount
                     39:
                     40: #define        MCOUNT \
1.7       fvdl       41: extern void mcount __P((void)) asm("mcount");                          \
1.2       mycroft    42: void                                                                   \
                     43: mcount()                                                               \
                     44: {                                                                      \
                     45:        int selfpc, frompcindex;                                        \
                     46:        /*                                                              \
                     47:         * find the return address for mcount,                          \
                     48:         * and the return address for mcount's caller.                  \
                     49:         *                                                              \
                     50:         * selfpc = pc pushed by mcount call                            \
                     51:         */                                                             \
                     52:        asm("movl 4(%%ebp),%0" : "=r" (selfpc));                        \
                     53:        /*                                                              \
                     54:         * frompcindex = pc pushed by call into self.                   \
                     55:         */                                                             \
1.4       mycroft    56:        asm("movl (%%ebp),%0;movl 4(%0),%0" : "=r" (frompcindex));      \
1.2       mycroft    57:        _mcount(frompcindex, selfpc);                                   \
1.1       mycroft    58: }
1.3       mycroft    59:
1.6       jtc        60: #ifdef _KERNEL
1.3       mycroft    61: /*
                     62:  * Note that we assume splhigh() and splx() cannot call mcount()
                     63:  * recursively.
                     64:  */
                     65: #define        MCOUNT_ENTER    s = splhigh()
                     66: #define        MCOUNT_EXIT     splx(s)
1.6       jtc        67: #endif /* _KERNEL */