freebsd-nq/sys/i386/include/profile.h
John Baldwin 56f5947a71 Remove checks for __GNUCLIKE_ASM assuming it is always true.
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
2022-04-12 10:05:45 -07:00

93 lines
3.2 KiB
C

/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* 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
* $FreeBSD$
*/
#ifndef _MACHINE_PROFILE_H_
#define _MACHINE_PROFILE_H_
#ifndef _KERNEL
#include <sys/cdefs.h>
#define FUNCTION_ALIGNMENT 4
#define _MCOUNT_DECL static __inline void _mcount
#define MCOUNT \
void \
mcount() \
{ \
uintfptr_t selfpc, frompc, ecx; \
/* \
* In gcc 4.2, ecx might be used in the caller as the arg \
* pointer if the stack realignment option is set (-mstackrealign) \
* or if the caller has the force_align_arg_pointer attribute \
* (stack realignment is ALWAYS on for main). Preserve ecx \
* here. \
*/ \
__asm("" : "=c" (ecx)); \
/* \
* 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 = ((uintfptr_t *)frompc)[1]; \
_mcount(frompc, selfpc); \
__asm("" : : "c" (ecx)); \
}
typedef u_int uintfptr_t;
/*
* An unsigned integral type that can hold non-negative difference between
* function pointers.
*/
typedef u_int fptrdiff_t;
__BEGIN_DECLS
void mcount(void) __asm(".mcount");
__END_DECLS
#endif /* !_KERNEL */
#endif /* !_MACHINE_PROFILE_H_ */