signal-defs.h (2988B)
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__ 82typedef void __signalfn_t(int); 83typedef __signalfn_t __user *__sighandler_t; 84 85typedef void __restorefn_t(void); 86typedef __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 */