/*-
* 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
*/
#ifdef __i386__
#include <i386/profile.h>
#else /* !__i386__ */
#ifndef _MACHINE_PROFILE_H_
#define _MACHINE_PROFILE_H_
#ifndef _KERNEL
#include <sys/cdefs.h>
#define FUNCTION_ALIGNMENT 4
#define _MCOUNT_DECL \
static void _mcount(uintfptr_t frompc, uintfptr_t selfpc) __used; \
static void _mcount
#define MCOUNT __asm(" \n\
.text \n\
.p2align 4,0x90 \n\
.globl .mcount \n\
.type .mcount,@function \n\
.mcount: \n\
pushq %rdi \n\
pushq %rsi \n\
pushq %rdx \n\
pushq %rcx \n\
pushq %r8 \n\
pushq %r9 \n\
pushq %rax \n\
movq 8(%rbp),%rdi \n\
movq 7*8(%rsp),%rsi \n\
call _mcount \n\
popq %rax \n\
popq %r9 \n\
popq %r8 \n\
popq %rcx \n\
popq %rdx \n\
popq %rsi \n\
popq %rdi \n\
ret \n\
.size .mcount, . - .mcount");
#if 0
/*
* We could use this, except it doesn't preserve the registers that were
* being passed with arguments to the function that we were inserted
* into. I've left it here as documentation of what the code above is
* supposed to do.
*/
#define MCOUNT \
void \
mcount() \
{ \
uintfptr_t selfpc, frompc; \
/* \
* Find the return address for mcount, \
* and the return address for mcount's caller. \
* \
* selfpc = pc pushed by call to mcount \
*/ \
__asm("movq 8(%%rbp),%0" : "=r" (selfpc)); \
/* \
* frompc = pc pushed by call to mcount's caller. \
* The caller's stack frame has already been built, so %rbp 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("movq (%%rbp),%0" : "=r" (frompc)); \
frompc = ((uintfptr_t *)frompc)[1]; \
_mcount(frompc, selfpc); \
}
#endif
typedef u_long uintfptr_t;
/*
* An unsigned integral type that can hold non-negative difference between
* function pointers.
*/
typedef u_long fptrdiff_t;
__BEGIN_DECLS
void mcount(void) __asm(".mcount");
__END_DECLS
#endif /* !_KERNEL */
#endif /* !_MACHINE_PROFILE_H_ */
#endif /* __i386__ */
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