1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2*4882a593Smuzhiyun #ifndef __ASM_GENERIC_SIGNAL_DEFS_H 3*4882a593Smuzhiyun #define __ASM_GENERIC_SIGNAL_DEFS_H 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun #include <linux/compiler.h> 6*4882a593Smuzhiyun 7*4882a593Smuzhiyun /* 8*4882a593Smuzhiyun * SA_FLAGS values: 9*4882a593Smuzhiyun * 10*4882a593Smuzhiyun * SA_NOCLDSTOP flag to turn off SIGCHLD when children stop. 11*4882a593Smuzhiyun * SA_NOCLDWAIT flag on SIGCHLD to inhibit zombies. 12*4882a593Smuzhiyun * SA_SIGINFO delivers the signal with SIGINFO structs. 13*4882a593Smuzhiyun * SA_ONSTACK indicates that a registered stack_t will be used. 14*4882a593Smuzhiyun * SA_RESTART flag to get restarting signals (which were the default long ago) 15*4882a593Smuzhiyun * SA_NODEFER prevents the current signal from being masked in the handler. 16*4882a593Smuzhiyun * SA_RESETHAND clears the handler when the signal is delivered. 17*4882a593Smuzhiyun * SA_UNSUPPORTED is a flag bit that will never be supported. Kernels from 18*4882a593Smuzhiyun * before the introduction of SA_UNSUPPORTED did not clear unknown bits from 19*4882a593Smuzhiyun * sa_flags when read using the oldact argument to sigaction and rt_sigaction, 20*4882a593Smuzhiyun * so this bit allows flag bit support to be detected from userspace while 21*4882a593Smuzhiyun * allowing an old kernel to be distinguished from a kernel that supports every 22*4882a593Smuzhiyun * flag bit. 23*4882a593Smuzhiyun * SA_EXPOSE_TAGBITS exposes an architecture-defined set of tag bits in 24*4882a593Smuzhiyun * siginfo.si_addr. 25*4882a593Smuzhiyun * 26*4882a593Smuzhiyun * SA_ONESHOT and SA_NOMASK are the historical Linux names for the Single 27*4882a593Smuzhiyun * Unix names RESETHAND and NODEFER respectively. 28*4882a593Smuzhiyun */ 29*4882a593Smuzhiyun #ifndef SA_NOCLDSTOP 30*4882a593Smuzhiyun #define SA_NOCLDSTOP 0x00000001 31*4882a593Smuzhiyun #endif 32*4882a593Smuzhiyun #ifndef SA_NOCLDWAIT 33*4882a593Smuzhiyun #define SA_NOCLDWAIT 0x00000002 34*4882a593Smuzhiyun #endif 35*4882a593Smuzhiyun #ifndef SA_SIGINFO 36*4882a593Smuzhiyun #define SA_SIGINFO 0x00000004 37*4882a593Smuzhiyun #endif 38*4882a593Smuzhiyun /* 0x00000008 used on alpha, mips, parisc */ 39*4882a593Smuzhiyun /* 0x00000010 used on alpha, parisc */ 40*4882a593Smuzhiyun /* 0x00000020 used on alpha, parisc, sparc */ 41*4882a593Smuzhiyun /* 0x00000040 used on alpha, parisc */ 42*4882a593Smuzhiyun /* 0x00000080 used on parisc */ 43*4882a593Smuzhiyun /* 0x00000100 used on sparc */ 44*4882a593Smuzhiyun /* 0x00000200 used on sparc */ 45*4882a593Smuzhiyun #define SA_UNSUPPORTED 0x00000400 46*4882a593Smuzhiyun #define SA_EXPOSE_TAGBITS 0x00000800 47*4882a593Smuzhiyun /* 0x00010000 used on mips */ 48*4882a593Smuzhiyun /* 0x01000000 used on x86 */ 49*4882a593Smuzhiyun /* 0x02000000 used on x86 */ 50*4882a593Smuzhiyun /* 51*4882a593Smuzhiyun * New architectures should not define the obsolete 52*4882a593Smuzhiyun * SA_RESTORER 0x04000000 53*4882a593Smuzhiyun */ 54*4882a593Smuzhiyun #ifndef SA_ONSTACK 55*4882a593Smuzhiyun #define SA_ONSTACK 0x08000000 56*4882a593Smuzhiyun #endif 57*4882a593Smuzhiyun #ifndef SA_RESTART 58*4882a593Smuzhiyun #define SA_RESTART 0x10000000 59*4882a593Smuzhiyun #endif 60*4882a593Smuzhiyun #ifndef SA_NODEFER 61*4882a593Smuzhiyun #define SA_NODEFER 0x40000000 62*4882a593Smuzhiyun #endif 63*4882a593Smuzhiyun #ifndef SA_RESETHAND 64*4882a593Smuzhiyun #define SA_RESETHAND 0x80000000 65*4882a593Smuzhiyun #endif 66*4882a593Smuzhiyun 67*4882a593Smuzhiyun #define SA_NOMASK SA_NODEFER 68*4882a593Smuzhiyun #define SA_ONESHOT SA_RESETHAND 69*4882a593Smuzhiyun 70*4882a593Smuzhiyun #ifndef SIG_BLOCK 71*4882a593Smuzhiyun #define SIG_BLOCK 0 /* for blocking signals */ 72*4882a593Smuzhiyun #endif 73*4882a593Smuzhiyun #ifndef SIG_UNBLOCK 74*4882a593Smuzhiyun #define SIG_UNBLOCK 1 /* for unblocking signals */ 75*4882a593Smuzhiyun #endif 76*4882a593Smuzhiyun #ifndef SIG_SETMASK 77*4882a593Smuzhiyun #define SIG_SETMASK 2 /* for setting the signal mask */ 78*4882a593Smuzhiyun #endif 79*4882a593Smuzhiyun 80*4882a593Smuzhiyun #ifndef __ASSEMBLY__ 81*4882a593Smuzhiyun typedef void __signalfn_t(int); 82*4882a593Smuzhiyun typedef __signalfn_t __user *__sighandler_t; 83*4882a593Smuzhiyun 84*4882a593Smuzhiyun typedef void __restorefn_t(void); 85*4882a593Smuzhiyun typedef __restorefn_t __user *__sigrestore_t; 86*4882a593Smuzhiyun 87*4882a593Smuzhiyun #define SIG_DFL ((__force __sighandler_t)0) /* default signal handling */ 88*4882a593Smuzhiyun #define SIG_IGN ((__force __sighandler_t)1) /* ignore signal */ 89*4882a593Smuzhiyun #define SIG_ERR ((__force __sighandler_t)-1) /* error return from signal */ 90*4882a593Smuzhiyun #endif 91*4882a593Smuzhiyun 92*4882a593Smuzhiyun #endif /* __ASM_GENERIC_SIGNAL_DEFS_H */ 93