libkern/c++/OSObjectAsm.s

   1 /*
   2  * Copyright (c) 2002 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22
  23 #if __GNUC__ >= 3
  24
  25 ;
  26 ; This function was generated by disassembling the 'OSObject::free(void)'
  27 ; function of the Panther7B7 kernel in gdb.
  28 ;
  29 ; Then add the 'li r4,3' flag taken fropm the Puma kernel 'OSObject::free'
  30 ;
  31     .text
  32
  33     .align  5
  34     .globl  __ZN8OSObject4freeEv
  35
  36 __ZN8OSObject4freeEv:
  37     ; function prologue
  38     stw     r31,-4(r1)
  39     mflr    r0
  40     stw     r0,8(r1)
  41     mr      r31,r3
  42     stwu    r1,-80(r1)
  43
  44     ; const OSMetaClass *meta = getMetaClass();
  45     lwz     r9,0(r3)
  46     lwz     r12,32(r9)
  47     mtctr   r12
  48     bctrl
  49
  50     ; if (meta)
  51     ;   meta->instanceDestructed();
  52     cmpwi   r3,0
  53     beq     delete_this
  54     bl      __ZNK11OSMetaClass18instanceDestructedEv
  55
  56 delete_this:
  57     ; delete this;
  58     lwz     r9,0(r31)
  59     mr      r3,r31
  60     li      r4,0        ; Load up some sort of flags, for 2.95 destructors?
  61     lwz     r0,88(r1)
  62     addi    r1,r1,80
  63     lwz     r12,8(r9)
  64     mtlr    r0
  65     lwz     r31,-4(r1)
  66     mtctr   r12
  67     bctr
  68
  69 #endif /* __GNUC__ >= 3 */