bsd/ppc/setjmp.h

   1 /*
   2  * Copyright (c) 2006 Apple Computer, Inc. All Rights Reserved.
   3  *
   4  * @APPLE_LICENSE_OSREFERENCE_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.  The rights granted to you under the
  10  * License may not be used to create, or enable the creation or
  11  * redistribution of, unlawful or unlicensed copies of an Apple operating
  12  * system, or to circumvent, violate, or enable the circumvention or
  13  * violation of, any terms of an Apple operating system software license
  14  * agreement.
  15  *
  16  * Please obtain a copy of the License at
  17  * http://www.opensource.apple.com/apsl/ and read it before using this
  18  * file.
  19  *
  20  * The Original Code and all software distributed under the License are
  21  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  22  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  23  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  25  * Please see the License for the specific language governing rights and
  26  * limitations under the License.
  27  *
  28  * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  29  */
  30 /* Copyright (c) 1998 Apple Computer, Inc.  All rights reserved.
  31  *
  32  *      File:   ppc/setjmp.h
  33  *
  34  *      Declaration of setjmp routines and data structures.
  35  */
  36 #ifndef _BSD_PPC_SETJMP_H_
  37 #define _BSD_PPC_SETJMP_H_
  38
  39 #include <sys/cdefs.h>
  40 #include <machine/signal.h>
  41
  42 struct _jmp_buf {
  43         struct sigcontext       sigcontext; /* kernel state preserved by set/longjmp */
  44         unsigned int vmask __attribute__((aligned(8))); /* vector mask register */
  45         unsigned int vreg[32 * 4] __attribute__((aligned(16)));
  46                 /* 32 128-bit vector registers */
  47 };
  48
  49 /*
  50  *      _JBLEN is number of ints required to save the following:
  51  *      r1, r2, r13-r31, lr, cr, ctr, xer, sig  == 26 register_t sized
  52  *      fr14 -  fr31 = 18 doubles
  53  *      vmask, 32 vector registers = 129 ints
  54  *      2 ints to get all the elements aligned
  55  *
  56  *      register_t is 2 ints for ppc64 threads
  57  */
  58 #define _JBLEN64        (26*2 + 18*2 + 129 + 1)
  59 #define _JBLEN32        (26 + 18*2 + 129 + 1)
  60 #define _JBLEN_MAX      _JBLEN64
  61
  62 /*
  63  * Locally scoped sizes
  64  */
  65 #if defined(__ppc64__)
  66 #define _JBLEN _JBLEN64
  67 #else
  68 #define _JBLEN _JBLEN32
  69 #endif
  70
  71 #if defined(KERNEL)
  72 typedef struct sigcontext32 jmp_buf32[1];
  73 typedef struct __sigjmp_buf32 {
  74                 int __storage[_JBLEN32 + 1] __attribute__((aligned(8)));
  75                 } sigjmp_buf32[1];
  76
  77 typedef struct sigcontext64 jmp_buf64[1];
  78 typedef struct __sigjmp_buf64 {
  79                 int __storage[_JBLEN64 + 1] __attribute__((aligned(8)));
  80                 } sigjmp_buf64[1];
  81
  82 /*
  83  * JMM - have to decide how the kernel will deal with this.
  84  * For now, hard-code the 32-bit types.
  85  */
  86 typedef struct sigcontext32 jmp_buf[1];
  87 typedef struct __sigjmp_buf32 sigjmp_buf[1];
  88
  89 #else
  90 typedef int jmp_buf[_JBLEN];
  91 typedef int sigjmp_buf[_JBLEN + 1];
  92 #endif
  93
  94 __BEGIN_DECLS
  95 extern int setjmp(jmp_buf env);
  96 extern void longjmp(jmp_buf env, int val);
  97
  98 #ifndef _ANSI_SOURCE
  99 int     _setjmp(jmp_buf env);
 100 void    _longjmp(jmp_buf, int val);
 101 int sigsetjmp(sigjmp_buf env, int val);
 102 void siglongjmp(sigjmp_buf env, int val);
 103 #endif /* _ANSI_SOURCE  */
 104
 105 #if !defined(_ANSI_SOURCE) && !defined(_POSIX_C_SOURCE)
 106 void    longjmperror(void);
 107 #endif /* neither ANSI nor POSIX */
 108 __END_DECLS
 109
 110 #endif /* !_BSD_PPC_SETJMP_H_ */