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