bsd/i386/setjmp.h

   1 /*
   2  * Copyright (c) 2000-2002 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) 1992 NeXT Computer, Inc.  All rights reserved.
  23  *
  24  *      File:   setjmp.h
  25  *
  26  *      Declaration of setjmp routines and data structures.
  27  */
  28 #ifndef _BSD_I386_SETJMP_H
  29 #define _BSD_I386_SETJMP_H
  30
  31 #include <sys/cdefs.h>
  32 #include <machine/signal.h>
  33
  34
  35 #if defined(__x86_64__)
  36 /*
  37  * _JBLEN is number of ints required to save the following:
  38  * rflags, rip, rbp, rsp, rbx, r12, r13, r14, r15... these are 8 bytes each
  39  * mxcsr, fp control word, sigmask... these are 4 bytes each
  40  * add 16 ints for future expansion needs...
  41  */
  42 #define _JBLEN ((9 * 2) + 3 + 16)
  43 typedef int jmp_buf[_JBLEN];
  44 typedef int sigjmp_buf[_JBLEN + 1];
  45
  46 #else
  47
  48 /*
  49  * _JBLEN is number of ints required to save the following:
  50  * eax, ebx, ecx, edx, edi, esi, ebp, esp, ss, eflags, eip,
  51  * cs, de, es, fs, gs == 16 ints
  52  * onstack, mask = 2 ints
  53  */
  54
  55 #if defined(KERNEL)
  56 typedef struct sigcontext jmp_buf[1];
  57 #define _JBLEN ((sizeof(struct sigcontext)) / sizeof(int))
  58 typedef int sigjmp_buf[_JBLEN+1];
  59 #else
  60 #define _JBLEN (18)
  61 typedef int jmp_buf[_JBLEN];
  62 typedef int sigjmp_buf[_JBLEN + 1];
  63 #endif
  64
  65 #endif
  66
  67 __BEGIN_DECLS
  68 extern int setjmp(jmp_buf env);
  69 extern void longjmp(jmp_buf env, int val);
  70
  71 #ifndef _ANSI_SOURCE
  72 int     _setjmp(jmp_buf env);
  73 void    _longjmp(jmp_buf, int val);
  74 int sigsetjmp(sigjmp_buf env, int val);
  75 void siglongjmp(sigjmp_buf env, int val);
  76 #endif /* _ANSI_SOURCE  */
  77
  78 #if !defined(_ANSI_SOURCE) && !defined(_POSIX_C_SOURCE)
  79 void    longjmperror(void);
  80 #endif /* neither ANSI nor POSIX */
  81 __END_DECLS
  82 #endif /* !_BSD_I386_SETJMP_H */