/*
* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. The rights granted to you under the License
* may not be used to create, or enable the creation or redistribution of,
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
*
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
#include <ppc/asm.h>
#include <ppc/proc_reg.h>
#include <assym.s>
#include <debug.h>
#include <mach/ppc/vm_param.h>
#include <ppc/exception.h>
/*
* The compiler generates calls to this function and passes address
* of caller of the function [ from which mcount is called ] as the
* first parameter.
* mcount disables interrupts prior to call mcount() and restores
* interrupt upon return.
* To prevent recursive calls to mcount(), a flag, mcountOff, is set
* in cpu_flags per_proc.
*/
.align 4
.globl mcount
mcount:
mflr r0 stwu r1,-64(r1) rlwinm r9,r9,0,MSR_FP_BIT+1,MSR_FP_BIT-1 rlwinm r8,r9,0,MSR_EE_BIT+1,MSR_EE_BIT-1 isync
mfsprg r7,1 lhz r6,PP_CPU_FLAGS(r7) cmplw r5,r6 sth r5,PP_CPU_FLAGS(r7) mr r4, r0
bl _mcount mfsprg r7,1 lhz r6,PP_CPU_FLAGS(r7) andc r6,r6,r5 mcount_ret:
addi r1,r1,64
mtmsr r9 mtlr r0
blr