56f5947a71
All supported compilers (modern versions of GCC and clang) support this. Many places didn't have an #else so would just silently do the wrong thing. Ancient versions of icc (the original motivation for this) are no longer a compiler FreeBSD supports. PR: 263102 (exp-run) Reviewed by: brooks, imp Differential Revision: https://reviews.freebsd.org/D34797
93 lines
3.2 KiB
C
93 lines
3.2 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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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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* $FreeBSD$
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*/
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#ifndef _MACHINE_PROFILE_H_
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#define _MACHINE_PROFILE_H_
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#ifndef _KERNEL
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#include <sys/cdefs.h>
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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, ecx; \
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/* \
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* In gcc 4.2, ecx might be used in the caller as the arg \
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* pointer if the stack realignment option is set (-mstackrealign) \
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* or if the caller has the force_align_arg_pointer attribute \
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* (stack realignment is ALWAYS on for main). Preserve ecx \
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* here. \
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*/ \
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__asm("" : "=c" (ecx)); \
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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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__asm("" : : "c" (ecx)); \
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}
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typedef u_int uintfptr_t;
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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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__BEGIN_DECLS
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void mcount(void) __asm(".mcount");
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__END_DECLS
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#endif /* !_KERNEL */
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#endif /* !_MACHINE_PROFILE_H_ */
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