/* $NetBSD: profile.h,v 1.18 2018/01/24 09:04:45 skrll 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"
#define PLTSYM
#if !defined(__ARM_EABI__)
#define MCOUNT \
__asm(".text"); \
__asm(".align 0"); \
__asm(".arm"); \
__asm(".type " MCOUNT_ASM_NAME ",%function"); \
__asm(".global " MCOUNT_ASM_NAME); \
__asm(MCOUNT_ASM_NAME ":"); \
/* \
* Preserve registers that are trashed during mcount \
*/ \
__asm("push {r0-r3, ip, lr}"); \
/* Check what mode we're in. EQ => 32, NE => 26 */ \
__asm("teq r0, r0"); \
__asm("teq pc, r15"); \
/* \
* find the return address for mcount, \
* and the return address for mcount's caller. \
* \
* frompcindex = pc pushed by call into self. \
*/ \
__asm("moveq r0, ip"); \
__asm("bicne r0, ip, #0xfc000003"); \
/* \
* selfpc = pc pushed by mcount call \
*/ \
__asm("moveq r1, lr"); \
__asm("bicne r1, lr, #0xfc000003"); \
/* \
* Call the real mcount code \
*/ \
__asm("bl " ___STRING(_C_LABEL(_mcount)) PLTSYM); \
/* \
* Restore registers that were trashed during mcount \
*/ \
__asm("pop {r0-r3, lr}"); \
__asm("pop {pc}"); \
__asm(".size " MCOUNT_ASM_NAME ", .-" MCOUNT_ASM_NAME);
#elif defined(__ARM_DWARF_EH__)
#define MCOUNT \
__asm(".text"); \
__asm(".align 0"); \
__asm(".arm"); \
__asm(".type " MCOUNT_ASM_NAME ",%function"); \
__asm(".global " MCOUNT_ASM_NAME); \
__asm(MCOUNT_ASM_NAME ":"); \
__asm(".cfi_startproc"); \
/* \
* Preserve registers that are trashed during mcount \
*/ \
__asm("push {r0-r3, ip, lr}"); \
__asm(".cfi_def_cfa_offset 24"); \
__asm(".cfi_offset 14, -4"); \
__asm(".cfi_offset 12, -8"); \
__asm(".cfi_offset 3, -12"); \
__asm(".cfi_offset 2, -16"); \
__asm(".cfi_offset 1, -20"); \
__asm(".cfi_offset 0, -24"); \
/* \
* 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(_C_LABEL(_mcount)) PLTSYM); \
/* \
* Restore registers that were trashed during mcount \
*/ \
__asm("pop {r0-r3, lr}"); \
__asm("pop {pc}"); \
__asm(".cfi_endproc"); \
__asm(".size " MCOUNT_ASM_NAME ", .-" MCOUNT_ASM_NAME);
#else
#define MCOUNT \
__asm(".text"); \
__asm(".align 0"); \
__asm(".arm"); \
__asm(".type " MCOUNT_ASM_NAME ",%function"); \
__asm(".global " MCOUNT_ASM_NAME); \
__asm(MCOUNT_ASM_NAME ":"); \
__asm(".fnstart"); \
__asm(".cfi_startproc"); \
/* \
* Preserve registers that are trashed during mcount \
*/ \
__asm("push {r0-r3, ip, lr}"); \
__asm(".save {r0-r3, lr}"); \
__asm(".cfi_def_cfa_offset 24"); \
__asm(".cfi_offset 14, -4"); \
__asm(".cfi_offset 12, -8"); \
__asm(".cfi_offset 3, -12"); \
__asm(".cfi_offset 2, -16"); \
__asm(".cfi_offset 1, -20"); \
__asm(".cfi_offset 0, -24"); \
/* \
* 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(_C_LABEL(_mcount)) PLTSYM); \
/* \
* Restore registers that were trashed during mcount \
*/ \
__asm("pop {r0-r3, lr}"); \
__asm("pop {pc}"); \
__asm(".cfi_endproc"); \
__asm(".fnend"); \
__asm(".size " MCOUNT_ASM_NAME ", .-" MCOUNT_ASM_NAME);
#endif
#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 */