ppc/sys/cerror.s

   1 /*
   2  * Copyright (c) 1999 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 /* Copyright (c) 1992 NeXT Computer, Inc.  All rights reserved.
  26  */
  27
  28 /* We use mode-independent "g" opcodes such as "srgi", and/or
  29  * mode-independent macros such as MI_GET_ADDRESS.  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     .globl  _errno
  36
  37 MI_ENTRY_POINT(cerror)
  38     MI_PUSH_STACK_FRAME
  39     MI_GET_ADDRESS(r12,_errno)
  40     stw     r3,0(r12)               /* save syscall return code in global */
  41     MI_CALL_EXTERNAL(_cthread_set_errno_self)
  42     li      r3,-1                   /* then bug return value */
  43     li      r4,-1                   /* in case we're returning a long-long in 32-bit mode, etc */
  44     MI_POP_STACK_FRAME_AND_RETURN