LCOM1920-T02G10

/*        $NetBSD: profile.h,v 1.33 2007/12/20 23:46:13 ad 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

 */

#ifdef _KERNEL_OPT

#include "opt_multiprocessor.h"

#endif

#ifdef _KERNEL

#include <machine/cpufunc.h>

#include <machine/lock.h>

#endif

#define        _MCOUNT_DECL static __inline void _mcount

#ifdef __ELF__

#define MCOUNT_ENTRY        "__mcount"

#define MCOUNT_COMPAT        __weak_alias(mcount, __mcount)

#else

#define MCOUNT_ENTRY        "mcount"

#define MCOUNT_COMPAT        /* nothing */

#endif

#define        MCOUNT \

MCOUNT_COMPAT                                                                \

extern void mcount(void) __asm(MCOUNT_ENTRY)                                \

        __attribute__((__no_instrument_function__));                        \

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((u_long)frompcindex, (u_long)selfpc);                        \

                                                                        \

        __asm volatile("movl %0,%%edx" : : "g" (edx));                        \

        __asm volatile("movl %0,%%ecx" : : "g" (ecx));                        \

        __asm volatile("movl %0,%%eax" : : "g" (eax));                        \

}

#ifdef _KERNEL

#ifdef MULTIPROCESSOR

__cpu_simple_lock_t __mcount_lock;

static inline void

MCOUNT_ENTER_MP(void)

{

        __cpu_simple_lock(&__mcount_lock);

        __insn_barrier();

}

static inline void

MCOUNT_EXIT_MP(void)

{

        __insn_barrier();

        __mcount_lock = __SIMPLELOCK_UNLOCKED;

}

#else

#define MCOUNT_ENTER_MP()

#define MCOUNT_EXIT_MP()

#endif

static inline void

mcount_disable_intr(void)

{

        __asm volatile("cli");

}

static inline u_long

mcount_read_psl(void)

{

        u_long        ef;

        __asm volatile("pushfl; popl %0" : "=r" (ef));

        return (ef);

}

static inline void

mcount_write_psl(u_long ef)

{

        __asm volatile("pushl %0; popfl" : : "r" (ef));

}

#define        MCOUNT_ENTER                                                        \

        s = (int)mcount_read_psl();                                        \

        mcount_disable_intr();                                                \

        MCOUNT_ENTER_MP();

#define        MCOUNT_EXIT                                                        \

        MCOUNT_EXIT_MP();                                                \

        mcount_write_psl(s);

#endif /* _KERNEL */