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/* $OpenBSD: profile.h,v 1.4 2016/05/27 16:32:38 deraadt Exp $ */
/* $NetBSD: profile.h,v 1.5 2002/03/24 15:49:40 bjh21 Exp $ */
/*
* Copyright (c) 2001 Ben Harris
* Copyright (c) 1995-1996 Mark Brinicombe
*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Mark Brinicombe.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
#define _MCOUNT_DECL void _mcount
/*
* Cannot implement mcount in C as GCC will trash the ip register when it
* pushes a trapframe. Pity we cannot insert assembly before the function
* prologue.
*/
#define MCOUNT_ASM_NAME "__mcount"
#ifdef __PIC__
#define PLTSYM "(PLT)"
#endif
#ifndef PLTSYM
#define PLTSYM
#endif
#define MCOUNT \
__asm__(".text"); \
__asm__(".align 0"); \
__asm__(".type " MCOUNT_ASM_NAME ",%function"); \
__asm__(".global " MCOUNT_ASM_NAME); \
__asm__(MCOUNT_ASM_NAME ":"); \
/* \
* Preserve registers that are trashed during mcount \
*/ \
__asm__("stmfd sp!, {r0-r3, ip, lr}"); \
/* \
* find the return address for mcount, \
* and the return address for mcount's caller. \
* \
* frompcindex = pc pushed by call into self. \
*/ \
__asm__("mov r0, ip"); \
/* \
* selfpc = pc pushed by mcount call \
*/ \
__asm__("mov r1, lr"); \
/* \
* Call the real mcount code \
*/ \
__asm__("bl " __STRING(_mcount) PLTSYM); \
/* \
* Restore registers that were trashed during mcount \
*/ \
__asm__("ldmfd sp!, {r0-r3, lr, pc}");
#ifdef _KERNEL
#include <arm/cpufunc.h>
/*
* splhigh() and splx() are heavyweight, and call mcount(). Therefore
* we disabled interrupts (IRQ, but not FIQ) directly on the CPU.
*
* We're lucky that the CPSR and 's' both happen to be 'int's.
*/
#define MCOUNT_ENTER s = __set_cpsr_c(0x0080, 0x0080); /* kill IRQ */
#define MCOUNT_EXIT __set_cpsr_c(0xffffffff, s); /* restore old value */
#endif /* _KERNEL */
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