1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2 #ifndef __ASM_GENERIC_SIGNAL_DEFS_H 3 #define __ASM_GENERIC_SIGNAL_DEFS_H 4 5 #include <linux/compiler.h> 6 7 /* 8 * SA_FLAGS values: 9 * 10 * SA_NOCLDSTOP flag to turn off SIGCHLD when children stop. 11 * SA_NOCLDWAIT flag on SIGCHLD to inhibit zombies. 12 * SA_SIGINFO delivers the signal with SIGINFO structs. 13 * SA_ONSTACK indicates that a registered stack_t will be used. 14 * SA_RESTART flag to get restarting signals (which were the default long ago) 15 * SA_NODEFER prevents the current signal from being masked in the handler. 16 * SA_RESETHAND clears the handler when the signal is delivered. 17 * SA_UNSUPPORTED is a flag bit that will never be supported. Kernels from 18 * before the introduction of SA_UNSUPPORTED did not clear unknown bits from 19 * sa_flags when read using the oldact argument to sigaction and rt_sigaction, 20 * so this bit allows flag bit support to be detected from userspace while 21 * allowing an old kernel to be distinguished from a kernel that supports every 22 * flag bit. 23 * SA_EXPOSE_TAGBITS exposes an architecture-defined set of tag bits in 24 * siginfo.si_addr. 25 * 26 * SA_ONESHOT and SA_NOMASK are the historical Linux names for the Single 27 * Unix names RESETHAND and NODEFER respectively. 28 */ 29 #ifndef SA_NOCLDSTOP 30 #define SA_NOCLDSTOP 0x00000001 31 #endif 32 #ifndef SA_NOCLDWAIT 33 #define SA_NOCLDWAIT 0x00000002 34 #endif 35 #ifndef SA_SIGINFO 36 #define SA_SIGINFO 0x00000004 37 #endif 38 /* 0x00000008 used on alpha, mips, parisc */ 39 /* 0x00000010 used on alpha, parisc */ 40 /* 0x00000020 used on alpha, parisc, sparc */ 41 /* 0x00000040 used on alpha, parisc */ 42 /* 0x00000080 used on parisc */ 43 /* 0x00000100 used on sparc */ 44 /* 0x00000200 used on sparc */ 45 #define SA_UNSUPPORTED 0x00000400 46 #define SA_EXPOSE_TAGBITS 0x00000800 47 /* 0x00010000 used on mips */ 48 /* 0x00800000 used for internal SA_IMMUTABLE */ 49 /* 0x01000000 used on x86 */ 50 /* 0x02000000 used on x86 */ 51 /* 52 * New architectures should not define the obsolete 53 * SA_RESTORER 0x04000000 54 */ 55 #ifndef SA_ONSTACK 56 #define SA_ONSTACK 0x08000000 57 #endif 58 #ifndef SA_RESTART 59 #define SA_RESTART 0x10000000 60 #endif 61 #ifndef SA_NODEFER 62 #define SA_NODEFER 0x40000000 63 #endif 64 #ifndef SA_RESETHAND 65 #define SA_RESETHAND 0x80000000 66 #endif 67 68 #define SA_NOMASK SA_NODEFER 69 #define SA_ONESHOT SA_RESETHAND 70 71 #ifndef SIG_BLOCK 72 #define SIG_BLOCK 0 /* for blocking signals */ 73 #endif 74 #ifndef SIG_UNBLOCK 75 #define SIG_UNBLOCK 1 /* for unblocking signals */ 76 #endif 77 #ifndef SIG_SETMASK 78 #define SIG_SETMASK 2 /* for setting the signal mask */ 79 #endif 80 81 #ifndef __ASSEMBLY__ 82 typedef void __signalfn_t(int); 83 typedef __signalfn_t __user *__sighandler_t; 84 85 typedef void __restorefn_t(void); 86 typedef __restorefn_t __user *__sigrestore_t; 87 88 #define SIG_DFL ((__force __sighandler_t)0) /* default signal handling */ 89 #define SIG_IGN ((__force __sighandler_t)1) /* ignore signal */ 90 #define SIG_ERR ((__force __sighandler_t)-1) /* error return from signal */ 91 #endif 92 93 #endif /* __ASM_GENERIC_SIGNAL_DEFS_H */ 94
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