138 lines
3.9 KiB
C
138 lines
3.9 KiB
C
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/* $NetBSD: profile.h,v 1.33 2007/12/20 23:46:13 ad Exp $ */
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/*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)profile.h 8.1 (Berkeley) 6/11/93
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*/
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#ifdef _KERNEL_OPT
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#include "opt_multiprocessor.h"
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#endif
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#ifdef _KERNEL
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#include <machine/cpufunc.h>
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#include <machine/lock.h>
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#endif
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#define _MCOUNT_DECL static __inline void _mcount
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#ifdef __ELF__
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#define MCOUNT_ENTRY "__mcount"
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#define MCOUNT_COMPAT __weak_alias(mcount, __mcount)
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#else
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#define MCOUNT_ENTRY "mcount"
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#define MCOUNT_COMPAT /* nothing */
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#endif
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#define MCOUNT \
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MCOUNT_COMPAT \
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extern void mcount(void) __asm(MCOUNT_ENTRY) \
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__attribute__((__no_instrument_function__)); \
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void \
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mcount(void) \
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{ \
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int selfpc, frompcindex; \
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int eax, ecx, edx; \
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\
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__asm volatile("movl %%eax,%0" : "=g" (eax)); \
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__asm volatile("movl %%ecx,%0" : "=g" (ecx)); \
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__asm volatile("movl %%edx,%0" : "=g" (edx)); \
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/* \
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* find the return address for mcount, \
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* and the return address for mcount's caller. \
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* \
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* selfpc = pc pushed by mcount call \
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*/ \
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__asm volatile("movl 4(%%ebp),%0" : "=r" (selfpc)); \
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/* \
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* frompcindex = pc pushed by call into self. \
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*/ \
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__asm volatile("movl (%%ebp),%0;movl 4(%0),%0" \
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: "=r" (frompcindex)); \
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_mcount((u_long)frompcindex, (u_long)selfpc); \
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\
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__asm volatile("movl %0,%%edx" : : "g" (edx)); \
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__asm volatile("movl %0,%%ecx" : : "g" (ecx)); \
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__asm volatile("movl %0,%%eax" : : "g" (eax)); \
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}
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#ifdef _KERNEL
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#ifdef MULTIPROCESSOR
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__cpu_simple_lock_t __mcount_lock;
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static inline void
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MCOUNT_ENTER_MP(void)
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{
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__cpu_simple_lock(&__mcount_lock);
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__insn_barrier();
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}
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static inline void
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MCOUNT_EXIT_MP(void)
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{
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__insn_barrier();
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__mcount_lock = __SIMPLELOCK_UNLOCKED;
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}
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#else
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#define MCOUNT_ENTER_MP()
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#define MCOUNT_EXIT_MP()
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#endif
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static inline void
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mcount_disable_intr(void)
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{
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__asm volatile("cli");
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}
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static inline u_long
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mcount_read_psl(void)
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{
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u_long ef;
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__asm volatile("pushfl; popl %0" : "=r" (ef));
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return (ef);
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}
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static inline void
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mcount_write_psl(u_long ef)
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{
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__asm volatile("pushl %0; popfl" : : "r" (ef));
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}
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#define MCOUNT_ENTER \
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s = (int)mcount_read_psl(); \
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mcount_disable_intr(); \
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MCOUNT_ENTER_MP();
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#define MCOUNT_EXIT \
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MCOUNT_EXIT_MP(); \
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mcount_write_psl(s);
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#endif /* _KERNEL */
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