spinlock_stub.s

   1 /*
   2  * Copyright (c) 2003 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25
  26 #define __APPLE_API_PRIVATE
  27 #include <machine/cpu_capabilities.h>
  28 #if defined(__ppc__)
  29 .data
  30 .section __TEXT,__picsymbolstub1,symbol_stubs,pure_instructions,32
  31         .align 2
  32 L__spin_lock$stub:
  33         .indirect_symbol __spin_lock
  34         ba      _COMM_PAGE_SPINLOCK_LOCK
  35         nop
  36         nop
  37         nop
  38         nop
  39         nop
  40         nop
  41         nop
  42 .data
  43 .lazy_symbol_pointer
  44 L__spin_lock$lazy_ptr:
  45         .indirect_symbol __spin_lock
  46         .long dyld_stub_binding_helper
  47 #elif defined(__i386__)
  48 .data
  49 .picsymbol_stub
  50 L__spin_lock$stub:
  51         .indirect_symbol __spin_lock
  52         movl    $(_COMM_PAGE_SPINLOCK_LOCK), %eax
  53         jmp     %eax
  54         nop
  55         call    LPC$1
  56 LPC$1:  popl    %eax
  57 L__spin_lock$stub_binder:
  58         lea     L1$lz-LPC$1(%eax),%eax
  59         pushl   %eax
  60         jmp     dyld_stub_binding_helper
  61 .data
  62 .lazy_symbol_pointer
  63 L1$lz:
  64         .indirect_symbol __spin_lock
  65         .long L__spin_lock$stub_binder
  66 #endif