freebsd-nq/sys/i386/include/profile.h

/*
 * 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 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.
 *
 *	@(#)profile.h	8.1 (Berkeley) 6/11/93
 * $Id: profile.h,v 1.5 1995/12/29 15:28:54 bde Exp $
 */

#ifndef _MACHINE_PROFILE_H_
#define	_MACHINE_PROFILE_H_

#ifdef KERNEL
/*
 * The kernel uses assembler stubs instead of unportable inlines.
 * This is mainly to save a little time when profiling is not enabled,
 * which is the usual case for the kernel.
 */
#define	_MCOUNT_DECL void mcount
#define	MCOUNT

#else /* !KERNEL */

#define	_MCOUNT_DECL static __inline void _mcount

#define	MCOUNT \
void \
mcount() \
{ \
	fptrint_t selfpc, frompc; \
	/* \
	 * Find the return address for mcount, \
	 * and the return address for mcount's caller. \
	 * \
	 * selfpc = pc pushed by call to mcount \
	 */ \
	asm("movl 4(%%ebp),%0" : "=r" (selfpc)); \
	/* \
	 * frompc = pc pushed by call to mcount's caller. \
	 * The caller's stack frame has already been built, so %ebp is \
	 * the caller's frame pointer.  The caller's raddr is in the \
	 * caller's frame following the caller's caller's frame pointer. \
	 */ \
	asm("movl (%%ebp),%0" : "=r" (frompc)); \
	frompc = ((fptrint_t *)frompc)[1]; \
	_mcount(frompc, selfpc); \
}
#endif /* KERNEL */

#ifdef KERNEL
#define	CALIB_SCALE	1000
#define	KCOUNT(p,index)	((p)->kcount[(index) \
			 / (HISTFRACTION * sizeof(*(p)->kcount))])
#define	MCOUNT_ENTER	{ save_eflags = read_eflags(); disable_intr(); }
#define	MCOUNT_EXIT	(write_eflags(save_eflags))
#define	PC_TO_I(p, pc)	((fptrint_t)(pc) - (fptrint_t)(p)->lowpc)
#endif

/* An unsigned integral type that can hold function pointers. */
typedef	u_int	fptrint_t;

/*
 * An unsigned integral type that can hold non-negative difference between
 * function pointers.
 */
typedef	int	fptrdiff_t;

__BEGIN_DECLS
#ifdef KERNEL
void	mcount __P((fptrint_t frompc, fptrint_t selfpc));
#else
void	mcount __P((void)) __asm("mcount");
static void	_mcount __P((fptrint_t frompc, fptrint_t selfpc));
#endif

#ifdef GUPROF
u_int	cputime __P((void));
void	mexitcount __P((fptrint_t selfpc));
#endif
__END_DECLS

#endif /* !_MACHINE_PROFILE_H_ */