bsd/ppc/setjmp.h

   1 /*
   2  * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /* Copyright (c) 1998 Apple Computer, Inc.  All rights reserved.
  23  *
  24  *      File:   ppc/setjmp.h
  25  *
  26  *      Declaration of setjmp routines and data structures.
  27  */
  28 #ifndef _BSD_PPC_SETJMP_H_
  29 #define _BSD_PPC_SETJMP_H_
  30
  31 #include <sys/cdefs.h>
  32 #include <machine/signal.h>
  33
  34 struct _jmp_buf {
  35         struct sigcontext       sigcontext; /* kernel state preserved by set/longjmp */
  36         unsigned int vmask __attribute__((aligned(8))); /* vector mask register */
  37         unsigned int vreg[32 * 4] __attribute__((aligned(16)));
  38                 /* 32 128-bit vector registers */
  39 };
  40
  41 /*
  42  *      _JBLEN is number of ints required to save the following:
  43  *      r1, r2, r13-r31, lr, cr, ctr, xer, sig  == 26 register_t sized
  44  *      fr14 -  fr31 = 18 doubles
  45  *      vmask, 32 vector registers = 129 ints
  46  *      2 ints to get all the elements aligned
  47  *
  48  *      register_t is 2 ints for ppc64 threads
  49  */
  50 #define _JBLEN64        (26*2 + 18*2 + 129 + 1)
  51 #define _JBLEN32        (26 + 18*2 + 129 + 1)
  52 #define _JBLEN_MAX      _JBLEN64
  53
  54 /*
  55  * Locally scoped sizes
  56  */
  57 #if defined(__ppc64__)
  58 #define _JBLEN _JBLEN64
  59 #else
  60 #define _JBLEN _JBLEN32
  61 #endif
  62
  63 #if defined(KERNEL)
  64 typedef struct sigcontext32 jmp_buf32[1];
  65 typedef struct __sigjmp_buf32 {
  66                 int __storage[_JBLEN32 + 1] __attribute__((aligned(8)));
  67                 } sigjmp_buf32[1];
  68
  69 typedef struct sigcontext64 jmp_buf64[1];
  70 typedef struct __sigjmp_buf64 {
  71                 int __storage[_JBLEN64 + 1] __attribute__((aligned(8)));
  72                 } sigjmp_buf64[1];
  73
  74 /*
  75  * JMM - have to decide how the kernel will deal with this.
  76  * For now, hard-code the 32-bit types.
  77  */
  78 typedef struct sigcontext32 jmp_buf[1];
  79 typedef struct __sigjmp_buf32 sigjmp_buf[1];
  80
  81 #else
  82 typedef int jmp_buf[_JBLEN];
  83 typedef int sigjmp_buf[_JBLEN + 1];
  84 #endif
  85
  86 __BEGIN_DECLS
  87 extern int setjmp(jmp_buf env);
  88 extern void longjmp(jmp_buf env, int val);
  89
  90 #ifndef _ANSI_SOURCE
  91 int     _setjmp(jmp_buf env);
  92 void    _longjmp(jmp_buf, int val);
  93 int sigsetjmp(sigjmp_buf env, int val);
  94 void siglongjmp(sigjmp_buf env, int val);
  95 #endif /* _ANSI_SOURCE  */
  96
  97 #if !defined(_ANSI_SOURCE) && !defined(_POSIX_C_SOURCE)
  98 void    longjmperror(void);
  99 #endif /* neither ANSI nor POSIX */
 100 __END_DECLS
 101
 102 #endif /* !_BSD_PPC_SETJMP_H_ */