1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
|
/*-
* Copyright (c) 2014 Andrew Turner
* Copyright (c) 2014-2015 The FreeBSD Foundation
* All rights reserved.
*
* This software was developed by Andrew Turner under
* sponsorship from the FreeBSD Foundation.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _MACHINE_SETJMP_H_
#define _MACHINE_SETJMP_H_
#include <sys/cdefs.h>
/*
* We need to store:
* - A magic value to differentiate the buffers
* - The stack pointer
* - The link register
* - 11 general purpose registers
* - 8 floating point registers
* - The signal mask (128 bits)
* i.e. 24 64-bit words, round this up to 31(+1) 128-bit words to allow for
* CPU extensions with larger registers and stronger alignment requirements.
*
* The registers to save are: r19 to r29, and d8 to d15.
*/
#define _JBLEN 31
#define _JB_SIGMASK 22
/* This should only be needed in libc and may change */
#ifdef __ASSEMBLER__
#define _JB_MAGIC__SETJMP 0xfb5d25837d7ff700
#define _JB_MAGIC_SETJMP 0xfb5d25837d7ff701
#endif
#ifndef __ASSEMBLER__
/*
* jmp_buf and sigjmp_buf are encapsulated in different structs to force
* compile-time diagnostics for mismatches. The structs are the same
* internally to avoid some run-time errors for mismatches.
*/
#if __BSD_VISIBLE || __POSIX_VISIBLE || __XSI_VISIBLE
typedef struct _sigjmp_buf { __int128_t _sjb[_JBLEN + 1]; } sigjmp_buf[1];
#endif
typedef struct _jmp_buf { __int128_t _jb[_JBLEN + 1]; } jmp_buf[1];
#endif /* __ASSEMBLER__ */
#endif /* !_MACHINE_SETJMP_H_ */
|
