ppc/gen/mcount.s

   1 /*
   2  * Copyright (c) 1999-2004 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23 /* Copyright 1997 Apple Computer, Inc.
  24 **
  25 ** 10 June 1997 - Created by mwatson@apple.com
  26 **
  27 */
  28
  29 /* We use mode-independent "g" opcodes such as "srgi".  These expand
  30  * into word operations when targeting __ppc__, and into doubleword
  31  * operations when targeting __ppc64__.
  32  */
  33 #include <architecture/ppc/mode_independent_asm.h>
  34
  35 MI_ENTRY_POINT(mcount)
  36         mflr    r0
  37         stg     r0,SF_RETURN(r1)
  38         stgu    r1,-SF_MINSIZE(r1)
  39         mr      r4,r0               /* pass our return address as 2nd argument */
  40         MI_CALL_EXTERNAL(_moncount)
  41         addi    r1,r1,SF_MINSIZE
  42         lg      r0,SF_RETURN(r1)
  43         mtlr    r0
  44         blr
  45