1 | /* Declarations for handling faults in the signal thread. |
2 | Copyright (C) 1994-2022 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 | <https://www.gnu.org/licenses/>. */ |
18 | |
19 | #ifndef _HURD_FAULT_H |
20 | #define _HURD_FAULT_H |
21 | |
22 | #include <hurd/sigpreempt.h> |
23 | #include <setjmp.h> |
24 | |
25 | /* Call this before code that might fault in the signal thread; SIGNO is |
26 | the signal expected to possibly arrive. This behaves like setjmp: it |
27 | returns zero the first time, and returns again nonzero if the signal |
28 | does arrive. */ |
29 | |
30 | #define _hurdsig_catch_fault(sigset, firstcode, lastcode) \ |
31 | (_hurdsig_fault_preemptor.signals = (sigset), \ |
32 | _hurdsig_fault_preemptor.first = (long int) (firstcode), \ |
33 | _hurdsig_fault_preemptor.last = (long int) (lastcode), \ |
34 | setjmp (_hurdsig_fault_env)) |
35 | |
36 | /* Call this at the end of a section protected by _hurdsig_catch_fault. */ |
37 | |
38 | #define _hurdsig_end_catch_fault() \ |
39 | (_hurdsig_fault_preemptor.signals = 0) |
40 | |
41 | extern jmp_buf _hurdsig_fault_env; |
42 | extern struct hurd_signal_preemptor _hurdsig_fault_preemptor; |
43 | |
44 | |
45 | #define _hurdsig_catch_memory_fault(object) \ |
46 | _hurdsig_catch_fault (__sigmask (SIGSEGV) | __sigmask (SIGBUS), \ |
47 | (object), (object) + 1) |
48 | |
49 | |
50 | #endif /* hurdfault.h */ |
51 | |