bsd/ppc/setjmp.h

   1 /*
   2  * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_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. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /* Copyright (c) 1998 Apple Computer, Inc.  All rights reserved.
  29  *
  30  *      File:   ppc/setjmp.h
  31  *
  32  *      Declaration of setjmp routines and data structures.
  33  */
  34 #ifndef _BSD_PPC_SETJMP_H_
  35 #define _BSD_PPC_SETJMP_H_
  36
  37 #include <sys/cdefs.h>
  38 #include <machine/signal.h>
  39
  40 struct _jmp_buf {
  41         struct sigcontext       sigcontext; /* kernel state preserved by set/longjmp */
  42         unsigned int vmask __attribute__((aligned(8))); /* vector mask register */
  43         unsigned int vreg[32 * 4] __attribute__((aligned(16)));
  44                 /* 32 128-bit vector registers */
  45 };
  46
  47 /*
  48  *      _JBLEN is number of ints required to save the following:
  49  *      r1, r2, r13-r31, lr, cr, ctr, xer, sig  == 26 register_t sized
  50  *      fr14 -  fr31 = 18 doubles
  51  *      vmask, 32 vector registers = 129 ints
  52  *      2 ints to get all the elements aligned
  53  *
  54  *      register_t is 2 ints for ppc64 threads
  55  */
  56 #define _JBLEN64        (26*2 + 18*2 + 129 + 1)
  57 #define _JBLEN32        (26 + 18*2 + 129 + 1)
  58 #define _JBLEN_MAX      _JBLEN64
  59
  60 /*
  61  * Locally scoped sizes
  62  */
  63 #if defined(__ppc64__)
  64 #define _JBLEN _JBLEN64
  65 #else
  66 #define _JBLEN _JBLEN32
  67 #endif
  68
  69 #if defined(KERNEL)
  70 typedef struct sigcontext32 jmp_buf32[1];
  71 typedef struct __sigjmp_buf32 {
  72                 int __storage[_JBLEN32 + 1] __attribute__((aligned(8)));
  73                 } sigjmp_buf32[1];
  74
  75 typedef struct sigcontext64 jmp_buf64[1];
  76 typedef struct __sigjmp_buf64 {
  77                 int __storage[_JBLEN64 + 1] __attribute__((aligned(8)));
  78                 } sigjmp_buf64[1];
  79
  80 /*
  81  * JMM - have to decide how the kernel will deal with this.
  82  * For now, hard-code the 32-bit types.
  83  */
  84 typedef struct sigcontext32 jmp_buf[1];
  85 typedef struct __sigjmp_buf32 sigjmp_buf[1];
  86
  87 #else
  88 typedef int jmp_buf[_JBLEN];
  89 typedef int sigjmp_buf[_JBLEN + 1];
  90 #endif
  91
  92 __BEGIN_DECLS
  93 extern int setjmp(jmp_buf env);
  94 extern void longjmp(jmp_buf env, int val);
  95
  96 #ifndef _ANSI_SOURCE
  97 int     _setjmp(jmp_buf env);
  98 void    _longjmp(jmp_buf, int val);
  99 int sigsetjmp(sigjmp_buf env, int val);
 100 void siglongjmp(sigjmp_buf env, int val);
 101 #endif /* _ANSI_SOURCE  */
 102
 103 #if !defined(_ANSI_SOURCE) && !defined(_POSIX_C_SOURCE)
 104 void    longjmperror(void);
 105 #endif /* neither ANSI nor POSIX */
 106 __END_DECLS
 107
 108 #endif /* !_BSD_PPC_SETJMP_H_ */