libsa/libsa/ppc/setjmp.h

   1 /*
   2  * Copyright (c) 2000 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 /*
  24  * @OSF_COPYRIGHT@
  25  */
  26
  27 #ifndef _PPC_SETJMP_H_
  28 #define _PPC_SETJMP_H_
  29
  30 /*
  31  * We save the following registers (marked as non-volatile in the ELF spec)
  32  *
  33  * r1      - stack pointer
  34  * r13     - small data area pointer
  35  * r14-r30 - local variables
  36  * r31     - local variable/environment pointer
  37  *
  38  * cr      - condition register
  39  * lr      - link register (to know where to jump back to)
  40  * xer     - fixed point exception register
  41  *
  42  * fpscr   - floating point status and control
  43  * f14-f31 - local variables
  44  *
  45  * which comes to 57 words. We round up to 64 for good measure.
  46  */
  47
  48 typedef int jmp_buf[64];
  49
  50 #endif  /* _PPC_SETJMP_H_ */