osfmk/ppc/thread.h

   1 /*
   2  * Copyright (c) 2000 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  * @OSF_COPYRIGHT@
  27  */
  28
  29 /*
  30  *      File:   machine/thread.h
  31  *
  32  *      This file contains the structure definitions for the thread
  33  *      state as applied to PPC processors.
  34  */
  35
  36 #ifndef _PPC_THREAD_H_
  37 #define _PPC_THREAD_H_
  38
  39 #include <mach/machine/vm_types.h>
  40
  41 /*
  42  * Return address of the function that called current function, given
  43  *      address of the first parameter of current function. We can't
  44  *      do it this way, since parameter was copied from a register
  45  *      into a local variable. Call an assembly sub-function to
  46  *      return this.
  47  */
  48
  49 extern vm_offset_t getrpc(void);
  50 #define GET_RETURN_PC(addr)     getrpc()
  51
  52 #define STACK_IKS(stack)                \
  53         ((vm_offset_t)(((vm_offset_t)stack)+KERNEL_STACK_SIZE)-FM_SIZE)
  54
  55 #define syscall_emulation_sync(task) /* do nothing */
  56
  57 /*
  58  * Defining this indicates that MD code will supply an exception()
  59  * routine, conformant with kern/exception.c (dependency alert!)
  60  * but which does wonderfully fast, machine-dependent magic.
  61  */
  62
  63 #define MACHINE_FAST_EXCEPTION 1
  64
  65 #endif  /* _PPC_THREAD_H_ */
  66
  67