FreeBSD/Linux Kernel Cross Reference
sys/mips/include/profile.h

     /*      $OpenBSD: profile.h,v 1.2 1999/01/27 04:46:05 imp Exp $ */
     /*-
      * Copyright (c) 1992, 1993
      *      The Regents of the University of California.  All rights reserved.
      *
      * This code is derived from software contributed to Berkeley by
      * Ralph Campbell.
      *
      * 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.
     * 4. 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.
     *
     *      from: @(#)profile.h     8.1 (Berkeley) 6/10/93
     *      JNPR: profile.h,v 1.4 2006/12/02 09:53:41 katta
     * $FreeBSD$
     */
    #ifndef _MACHINE_PROFILE_H_
    #define _MACHINE_PROFILE_H_
    
    #define _MCOUNT_DECL void ___mcount
    
    /*XXX The cprestore instruction is a "dummy" to shut up as(1). */
    
    /*XXX This is not MIPS64 safe. */
    
    #define MCOUNT \
            __asm(".text;"                  \
            ".globl _mcount;"               \
            ".type _mcount,@function;"      \
            "_mcount:;"                     \
            ".set noreorder;"               \
            ".set noat;"                    \
            ".cpload $25;"                  \
            ".cprestore 4;"                 \
            "sw $4,8($29);"                 \
            "sw $5,12($29);"                \
            "sw $6,16($29);"                \
            "sw $7,20($29);"                \
            "sw $1,0($29);"                 \
            "sw $31,4($29);"                \
            "move $5,$31;"                  \
            "jal ___mcount;"                \
            "move $4,$1;"                   \
            "lw $4,8($29);"                 \
            "lw $5,12($29);"                \
            "lw $6,16($29);"                \
            "lw $7,20($29);"                \
            "lw $31,4($29);"                \
            "lw $1,0($29);"                 \
            "addu $29,$29,8;"               \
            "j $31;"                        \
            "move $31,$1;"                  \
            ".set reorder;"                 \
            ".set at");
    
    #ifdef _KERNEL
    /*
     * The following two macros do splhigh and splx respectively.
     * They have to be defined this way because these are real
     * functions on the MIPS, and we do not want to invoke mcount
     * recursively.
     */
    
    #define MCOUNT_DECL(s)  u_long s;
    #ifdef SMP
    extern int      mcount_lock;
    #define MCOUNT_ENTER(s) {                                       \
            s = intr_disable();                                     \
            while (!atomic_cmpset_acq_int(&mcount_lock, 0, 1))      \
                    /* nothing */ ;                                 \
    }
    #define MCOUNT_EXIT(s)  {                                       \
            atomic_store_rel_int(&mcount_lock, 0);                  \
            intr_restore(s);                                                \
    }
    #else
    #define MCOUNT_ENTER(s) { s = intr_disable(); }
    #define MCOUNT_EXIT(s)  (intr_restore(s))
    #endif
   
   /* REVISIT for mips */
   /*
    * Config generates something to tell the compiler to align functions on 16
    * byte boundaries.  A strict alignment is good for keeping the tables small.
    */
   #define FUNCTION_ALIGNMENT      16
   
   #ifdef GUPROF
   struct gmonparam;
   void    stopguprof __P((struct gmonparam *p));
   #else
   #define stopguprof(p)
   #endif /* GUPROF */
   
   #else   /* !_KERNEL */
   
   #define FUNCTION_ALIGNMENT      4
   
   #ifdef __mips_n64
   typedef u_long  uintfptr_t;
   #else
   typedef u_int   uintfptr_t;
   #endif
   
   #endif /* _KERNEL */
   
   /*
    * An unsigned integral type that can hold non-negative difference between
    * function pointers.
    */
   #ifdef __mips_n64
   typedef u_long  fptrdiff_t;
   #else
   typedef u_int   fptrdiff_t;
   #endif
   
   #ifdef _KERNEL
   
   void    mcount(uintfptr_t frompc, uintfptr_t selfpc);
   
   #ifdef GUPROF
   struct gmonparam;
   
   void    nullfunc_loop_profiled(void);
   void    nullfunc_profiled(void);
   void    startguprof(struct gmonparam *p);
   void    stopguprof(struct gmonparam *p);
   #else
   #define startguprof(p)
   #define stopguprof(p)
   #endif /* GUPROF */
   
   #else /* !_KERNEL */
   
   #include <sys/cdefs.h>
   
   __BEGIN_DECLS
   #ifdef __GNUC__
   #ifdef __ELF__
   void    mcount(void) __asm(".mcount");
   #else
   void    mcount(void) __asm("mcount");
   #endif
   #endif
   void    _mcount(uintfptr_t frompc, uintfptr_t selfpc);
   __END_DECLS
   
   #endif /* _KERNEL */
   
   #ifdef GUPROF
   /* XXX doesn't quite work outside kernel yet. */
   extern int      cputime_bias;
   
   __BEGIN_DECLS
   int     cputime(void);
   void    empty_loop(void);
   void    mexitcount(uintfptr_t selfpc);
   void    nullfunc(void);
   void    nullfunc_loop(void);
   __END_DECLS
   #endif
   
   #endif /* !_MACHINE_PROFILE_H_ */

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