bsd/i386/setjmp.h

   1 /*
   2  * Copyright (c) 2000-2002 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) 1992 NeXT Computer, Inc.  All rights reserved.
  29  *
  30  *      File:   setjmp.h
  31  *
  32  *      Declaration of setjmp routines and data structures.
  33  */
  34 #ifndef _BSD_I386_SETJMP_H
  35 #define _BSD_I386_SETJMP_H
  36
  37 #include <sys/cdefs.h>
  38 #include <machine/signal.h>
  39
  40
  41 #if defined(__x86_64__)
  42 /*
  43  * _JBLEN is number of ints required to save the following:
  44  * rflags, rip, rbp, rsp, rbx, r12, r13, r14, r15... these are 8 bytes each
  45  * mxcsr, fp control word, sigmask... these are 4 bytes each
  46  * add 16 ints for future expansion needs...
  47  */
  48 #define _JBLEN ((9 * 2) + 3 + 16)
  49 typedef int jmp_buf[_JBLEN];
  50 typedef int sigjmp_buf[_JBLEN + 1];
  51
  52 #else
  53
  54 /*
  55  * _JBLEN is number of ints required to save the following:
  56  * eax, ebx, ecx, edx, edi, esi, ebp, esp, ss, eflags, eip,
  57  * cs, de, es, fs, gs == 16 ints
  58  * onstack, mask = 2 ints
  59  */
  60
  61 #if defined(KERNEL)
  62 typedef struct sigcontext jmp_buf[1];
  63 #define _JBLEN ((sizeof(struct sigcontext)) / sizeof(int))
  64 typedef int sigjmp_buf[_JBLEN+1];
  65 #else
  66 #define _JBLEN (18)
  67 typedef int jmp_buf[_JBLEN];
  68 typedef int sigjmp_buf[_JBLEN + 1];
  69 #endif
  70
  71 #endif
  72
  73 __BEGIN_DECLS
  74 extern int setjmp(jmp_buf env);
  75 extern void longjmp(jmp_buf env, int val);
  76
  77 #ifndef _ANSI_SOURCE
  78 int     _setjmp(jmp_buf env);
  79 void    _longjmp(jmp_buf, int val);
  80 int sigsetjmp(sigjmp_buf env, int val);
  81 void siglongjmp(sigjmp_buf env, int val);
  82 #endif /* _ANSI_SOURCE  */
  83
  84 #if !defined(_ANSI_SOURCE) && !defined(_POSIX_C_SOURCE)
  85 void    longjmperror(void);
  86 #endif /* neither ANSI nor POSIX */
  87 __END_DECLS
  88 #endif /* !_BSD_I386_SETJMP_H */