ppc/sys/cerror.s

   1 /*
   2  * Copyright (c) 1999 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 (c) 1992 NeXT Computer, Inc.  All rights reserved.
  24  */
  25
  26 /* We use mode-independent "g" opcodes such as "srgi", and/or
  27  * mode-independent macros such as MI_GET_ADDRESS.  These expand
  28  * into word operations when targeting __ppc__, and into doubleword
  29  * operations when targeting __ppc64__.
  30  */
  31 #include <architecture/ppc/mode_independent_asm.h>
  32
  33     .globl  _errno
  34
  35 #if 0
  36 MI_ENTRY_POINT(cerror_cvt)
  37     MI_PUSH_STACK_FRAME
  38     MI_GET_ADDRESS(r12,_errno)
  39     cmplwi  r3,102                  /* EOPNOTSUPP? */
  40     bne     1f
  41     li      r3,45                   /* Yes; make ENOTSUP for compatibility */
  42 1:
  43     stw     r3,0(r12)               /* save syscall return code in global */
  44     MI_CALL_EXTERNAL(_cthread_set_errno_self)
  45     li      r3,-1                   /* then bug return value */
  46     li      r4,-1                   /* in case we're returning a long-long in 32-bit mode, etc */
  47     MI_POP_STACK_FRAME_AND_RETURN
  48 #endif
  49
  50 MI_ENTRY_POINT(cerror_cvt)
  51     cmplwi  r3,102                  /* EOPNOTSUPP? */
  52     bne     1f
  53     li      r3,45                   /* Yes; make ENOTSUP for compatibility */
  54 1:
  55 MI_ENTRY_POINT(cerror)
  56     MI_PUSH_STACK_FRAME
  57     MI_GET_ADDRESS(r12,_errno)
  58     stw     r3,0(r12)               /* save syscall return code in global */
  59     MI_CALL_EXTERNAL(_cthread_set_errno_self)
  60     li      r3,-1                   /* then bug return value */
  61     li      r4,-1                   /* in case we're returning a long-long in 32-bit mode, etc */
  62     MI_POP_STACK_FRAME_AND_RETURN