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/* $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 */
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