xf.li | bdd93d5 | 2023-05-12 07:10:14 -0700 | [diff] [blame^] | 1 | /* Declarations for handling faults in the signal thread. |
| 2 | Copyright (C) 1994-2016 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 _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 */ |