text: /*	$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: releng/9.3/sys/mips/include/profile.h 210606 2010-07-29 14:04:29Z jchandra $
   */
  #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(".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_ */
  