runtime/Auto.subproj/objc-auto-ppc.s

   1 /*
   2  * Copyright (c) 2004, 2006 Apple 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
  24 #ifdef __ppc__
  25
  26  ;
  27  ; This section includes declarations of routines that will be used to populate
  28  ; the runtime pages during auto initialization.  Each wb_routine definition
  29  ; creates an absolute branch into the rtp plus a non-gc version of code for
  30  ; non collecting apps.  Note - the blr is necessary at the end of the non-gc
  31  ; routine for code copying to behave correctly.
  32  ;
  33
  34 #undef  OBJC_ASM
  35 #define OBJC_ASM
  36 #include "objc-rtp.h"
  37
  38     .macro  wb_routine
  39     .globl  _$0                ; primary entry name
  40 ;   .abs    _abs_$0,kRTAddress_$0
  41 _$0:                           ; primary entry point
  42     ba      $1                 ; branch to runtime page
  43
  44     .private_extern _$0_non_gc ; non_gc entry point name
  45 _$0_non_gc:                    ; non_gc entry point
  46     .endmacro
  47
  48     .text
  49
  50 // note - unfortunately ba does not accept constant expressions
  51
  52     ; non-gc routines
  53
  54     ; id objc_assign_strongCast(id value, id *dest)
  55     wb_routine  objc_assign_strongCast,0xfffefea0
  56     stw         r3,0(r4)        ; store value at dest
  57     blr                         ; return
  58
  59     ; id objc_assign_global(id value, id *dest)
  60     wb_routine  objc_assign_global,0xfffefeb0
  61     stw         r3,0(r4)        ; store value at dest
  62     blr                         ; return
  63
  64     ; id objc_assign_ivar(id value, id dest, unsigned int offset)
  65     wb_routine  objc_assign_ivar,0xfffefec0
  66     stwx        r3,r4,r5        ; store value at (dest+offset)
  67     blr                         ; return
  68
  69 #endif