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)
37typedef int jmp_buf[_JBLEN];
38typedef 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)
50typedef int jmp_buf[_JBLEN];
51typedef int sigjmp_buf[_JBLEN + 1];
52
53#elif defined(__arm__) && !defined(__ARM_ARCH_7K__)
54/*
55 *	_JBLEN is number of ints required to save the following:
56 *	r4-r8, r10, fp, sp, lr, sig  == 10 register_t sized
57 *	s16-s31 == 16 register_t sized + 1 int for FSTMX
58 *	1 extra int for future use
59 */
60#define _JBLEN		(10 + 16 + 2)
61#define _JBLEN_MAX	_JBLEN
62
63typedef int jmp_buf[_JBLEN];
64typedef int sigjmp_buf[_JBLEN + 1];
65
66#elif defined(__arm64__) || defined(__ARM_ARCH_7K__)
67/*
68 * _JBLEN is the number of ints required to save the following:
69 * r21-r29, sp, fp, lr == 12 registers, 8 bytes each. d8-d15
70 * are another 8 registers, each 8 bytes long. (aapcs64 specifies
71 * that only 64-bit versions of FP registers need to be saved).
72 * Finally, two 8-byte fields for signal handling purposes.
73 */
74#define _JBLEN		((14 + 8 + 2) * 2)
75
76typedef int jmp_buf[_JBLEN];
77typedef int sigjmp_buf[_JBLEN + 1];
78
79#else
80#	error Undefined platform for setjmp
81#endif
82
83__BEGIN_DECLS
84extern int	setjmp(jmp_buf);
85extern void longjmp(jmp_buf, int) __dead2;
86
87#ifndef _ANSI_SOURCE
88int	_setjmp(jmp_buf);
89void	_longjmp(jmp_buf, int) __dead2;
90int	sigsetjmp(sigjmp_buf, int);
91void	siglongjmp(sigjmp_buf, int) __dead2;
92#endif /* _ANSI_SOURCE  */
93
94#if !defined(_ANSI_SOURCE) && (!defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE))
95void	longjmperror(void);
96#endif /* neither ANSI nor POSIX */
97__END_DECLS
98
99#endif /* _BSD_SETJMP_H */