1 | /* Internal header file for <setjmp.h>. Linux/x86 version. |
2 | Copyright (C) 2017-2018 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either |
8 | version 2.1 of the License, or (at your option) any later version. |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | Lesser General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ |
18 | |
19 | #ifndef _SETJMPP_H |
20 | #define _SETJMPP_H 1 |
21 | |
22 | #include <bits/types/__sigset_t.h> |
23 | |
24 | /* The biggest signal number + 1. As of kernel 4.14, x86 _NSIG is 64. |
25 | Define it to 513 to leave some rooms for future use. */ |
26 | #define _JUMP_BUF_SIGSET_NSIG 513 |
27 | /* Number of longs to hold all signals. */ |
28 | #define _JUMP_BUF_SIGSET_NWORDS \ |
29 | ((_JUMP_BUF_SIGSET_NSIG - 1 + 7) / (8 * sizeof (unsigned long int))) |
30 | |
31 | typedef struct |
32 | { |
33 | unsigned long int __val[_JUMP_BUF_SIGSET_NWORDS]; |
34 | } __jmp_buf_sigset_t; |
35 | |
36 | typedef union |
37 | { |
38 | __sigset_t __saved_mask_compat; |
39 | struct |
40 | { |
41 | __jmp_buf_sigset_t __saved_mask; |
42 | /* Used for shadow stack pointer. */ |
43 | unsigned long int __shadow_stack_pointer; |
44 | } __saved; |
45 | } __jmpbuf_arch_t; |
46 | |
47 | #undef __sigset_t |
48 | #define __sigset_t __jmpbuf_arch_t |
49 | #include <setjmp.h> |
50 | #undef __saved_mask |
51 | #define __saved_mask __saved_mask.__saved.__saved_mask |
52 | |
53 | #include <signal.h> |
54 | |
55 | #define _SIGPROCMASK_NSIG_WORDS (_NSIG / (8 * sizeof (unsigned long int))) |
56 | |
57 | typedef struct |
58 | { |
59 | unsigned long int __val[_SIGPROCMASK_NSIG_WORDS]; |
60 | } __sigprocmask_sigset_t; |
61 | |
62 | extern jmp_buf ___buf; |
63 | extern __typeof (___buf[0].__saved_mask) ___saved_mask; |
64 | _Static_assert (sizeof (___saved_mask) >= sizeof (__sigprocmask_sigset_t), |
65 | "size of ___saved_mask < size of __sigprocmask_sigset_t" ); |
66 | |
67 | #endif /* setjmpP.h */ |
68 | |