92fd4795fa
for SMP in the plain profiling case. It seems to work too. This error was not detected by LINT because LINT only compiles the GUPROF profiling case, which is is a superset of the plain profiling case for !SMP but which is so broken for SMP that the buggy code is not compiled.
166 lines
4.9 KiB
C
166 lines
4.9 KiB
C
/*
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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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* $FreeBSD$
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*/
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#ifndef _MACHINE_PROFILE_H_
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#define _MACHINE_PROFILE_H_
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#ifdef _KERNEL
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/*
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* Config generates something to tell the compiler to align functions on 16
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* byte boundaries. A strict alignment is good for keeping the tables small.
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*/
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#define FUNCTION_ALIGNMENT 16
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/*
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* The kernel uses assembler stubs instead of unportable inlines.
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* This is mainly to save a little time when profiling is not enabled,
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* which is the usual case for the kernel.
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*/
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#define _MCOUNT_DECL void mcount
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#define MCOUNT
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#ifdef GUPROF
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#define CALIB_SCALE 1000
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#define KCOUNT(p,index) ((p)->kcount[(index) \
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/ (HISTFRACTION * sizeof(HISTCOUNTER))])
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#define MCOUNT_DECL(s)
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#define MCOUNT_ENTER(s)
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#define MCOUNT_EXIT(s)
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#define PC_TO_I(p, pc) ((uintfptr_t)(pc) - (uintfptr_t)(p)->lowpc)
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#else
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#define MCOUNT_DECL(s) u_long s;
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#ifdef SMP
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extern int mcount_lock;
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#define MCOUNT_ENTER(s) { s = read_eflags(); disable_intr(); \
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while (!atomic_cmpset_acq_int(&mcount_lock, 0, 1)) \
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/* nothing */ ; }
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#define MCOUNT_EXIT(s) { atomic_store_rel_int(&mcount_lock, 0); \
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write_eflags(s); }
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#else
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#define MCOUNT_ENTER(s) { s = read_eflags(); disable_intr(); }
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#define MCOUNT_EXIT(s) (write_eflags(s))
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#endif
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#endif /* GUPROF */
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#else /* !_KERNEL */
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#define FUNCTION_ALIGNMENT 4
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#define _MCOUNT_DECL static __inline void _mcount
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#define MCOUNT \
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void \
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mcount() \
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{ \
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uintfptr_t selfpc, frompc; \
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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 call to mcount \
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*/ \
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asm("movl 4(%%ebp),%0" : "=r" (selfpc)); \
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/* \
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* frompc = pc pushed by call to mcount's caller. \
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* The caller's stack frame has already been built, so %ebp is \
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* the caller's frame pointer. The caller's raddr is in the \
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* caller's frame following the caller's caller's frame pointer. \
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*/ \
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asm("movl (%%ebp),%0" : "=r" (frompc)); \
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frompc = ((uintfptr_t *)frompc)[1]; \
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_mcount(frompc, selfpc); \
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}
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typedef unsigned int uintfptr_t;
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#endif /* _KERNEL */
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/*
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* An unsigned integral type that can hold non-negative difference between
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* function pointers.
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*/
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typedef u_int fptrdiff_t;
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#ifdef _KERNEL
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void mcount __P((uintfptr_t frompc, uintfptr_t selfpc));
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void kmupetext __P((uintfptr_t nhighpc));
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#ifdef GUPROF
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struct gmonparam;
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void nullfunc_loop_profiled __P((void));
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void nullfunc_profiled __P((void));
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void startguprof __P((struct gmonparam *p));
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void stopguprof __P((struct gmonparam *p));
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#else
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#define startguprof(p)
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#define stopguprof(p)
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#endif /* GUPROF */
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#else /* !_KERNEL */
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#include <sys/cdefs.h>
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__BEGIN_DECLS
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#ifdef __GNUC__
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#ifdef __ELF__
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void mcount __P((void)) __asm(".mcount");
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#else
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void mcount __P((void)) __asm("mcount");
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#endif
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#endif
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static void _mcount __P((uintfptr_t frompc, uintfptr_t selfpc));
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__END_DECLS
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#endif /* _KERNEL */
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#ifdef GUPROF
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/* XXX doesn't quite work outside kernel yet. */
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extern int cputime_bias;
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__BEGIN_DECLS
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int cputime __P((void));
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void empty_loop __P((void));
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void mexitcount __P((uintfptr_t selfpc));
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void nullfunc __P((void));
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void nullfunc_loop __P((void));
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__END_DECLS
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#endif
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#endif /* !_MACHINE_PROFILE_H_ */
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