include/setjmp.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_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. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23 #ifndef _BSD_SETJMP_H
  24 #define _BSD_SETJMP_H
  25
  26 #include <sys/cdefs.h>
  27 #include <Availability.h>
  28
  29 #if defined(__x86_64__)
  30 /*
  31  * _JBLEN is number of ints required to save the following:
  32  * rflags, rip, rbp, rsp, rbx, r12, r13, r14, r15... these are 8 bytes each
  33  * mxcsr, fp control word, sigmask... these are 4 bytes each
  34  * add 16 ints for future expansion needs...
  35  */
  36 #define _JBLEN ((9 * 2) + 3 + 16)
  37 typedef int jmp_buf[_JBLEN];
  38 typedef int sigjmp_buf[_JBLEN + 1];
  39
  40 #elif defined(__i386__)
  41
  42 /*
  43  * _JBLEN is number of ints required to save the following:
  44  * eax, ebx, ecx, edx, edi, esi, ebp, esp, ss, eflags, eip,
  45  * cs, de, es, fs, gs == 16 ints
  46  * onstack, mask = 2 ints
  47  */
  48
  49 #define _JBLEN (18)
  50 typedef int jmp_buf[_JBLEN];
  51 typedef int sigjmp_buf[_JBLEN + 1];
  52
  53 #elif defined(__arm__) && !defined(__ARM_ARCH_7K__)
  54
  55 #include <machine/signal.h>
  56
  57 /*
  58  *      _JBLEN is number of ints required to save the following:
  59  *      r4-r8, r10, fp, sp, lr, sig  == 10 register_t sized
  60  *      s16-s31 == 16 register_t sized + 1 int for FSTMX
  61  *      1 extra int for future use
  62  */
  63 #define _JBLEN          (10 + 16 + 2)
  64 #define _JBLEN_MAX      _JBLEN
  65
  66 typedef int jmp_buf[_JBLEN];
  67 typedef int sigjmp_buf[_JBLEN + 1];
  68
  69 #elif defined(__arm64__) || defined(__ARM_ARCH_7K__)
  70 /*
  71  * _JBLEN is the number of ints required to save the following:
  72  * r21-r29, sp, fp, lr == 12 registers, 8 bytes each. d8-d15
  73  * are another 8 registers, each 8 bytes long. (aapcs64 specifies
  74  * that only 64-bit versions of FP registers need to be saved).
  75  * Finally, two 8-byte fields for signal handling purposes.
  76  */
  77 #define _JBLEN          ((14 + 8 + 2) * 2)
  78
  79 typedef int jmp_buf[_JBLEN];
  80 typedef int sigjmp_buf[_JBLEN + 1];
  81
  82 #else
  83 #       error Undefined platform for setjmp
  84 #endif
  85
  86 __BEGIN_DECLS
  87 extern int      setjmp(jmp_buf);
  88 extern void longjmp(jmp_buf, int) __dead2;
  89
  90 #ifndef _ANSI_SOURCE
  91 int     _setjmp(jmp_buf);
  92 void    _longjmp(jmp_buf, int) __dead2;
  93 int     sigsetjmp(sigjmp_buf, int);
  94 void    siglongjmp(sigjmp_buf, int) __dead2;
  95 #endif /* _ANSI_SOURCE  */
  96
  97 #if !defined(_ANSI_SOURCE) && (!defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE))
  98 void    longjmperror(void);
  99 #endif /* neither ANSI nor POSIX */
 100 __END_DECLS
 101
 102 #endif /* _BSD_SETJMP_H */