Current File : //usr/include/asm-generic/signal-defs.h
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef __ASM_GENERIC_SIGNAL_DEFS_H
#define __ASM_GENERIC_SIGNAL_DEFS_H
/*
* SA_FLAGS values:
*
* SA_NOCLDSTOP flag to turn off SIGCHLD when children stop.
* SA_NOCLDWAIT flag on SIGCHLD to inhibit zombies.
* SA_SIGINFO delivers the signal with SIGINFO structs.
* SA_ONSTACK indicates that a registered stack_t will be used.
* SA_RESTART flag to get restarting signals (which were the default long ago)
* SA_NODEFER prevents the current signal from being masked in the handler.
* SA_RESETHAND clears the handler when the signal is delivered.
* SA_UNSUPPORTED is a flag bit that will never be supported. Kernels from
* before the introduction of SA_UNSUPPORTED did not clear unknown bits from
* sa_flags when read using the oldact argument to sigaction and rt_sigaction,
* so this bit allows flag bit support to be detected from userspace while
* allowing an old kernel to be distinguished from a kernel that supports every
* flag bit.
* SA_EXPOSE_TAGBITS exposes an architecture-defined set of tag bits in
* siginfo.si_addr.
*
* SA_ONESHOT and SA_NOMASK are the historical Linux names for the Single
* Unix names RESETHAND and NODEFER respectively.
*/
#ifndef SA_NOCLDSTOP
#define SA_NOCLDSTOP 0x00000001
#endif
#ifndef SA_NOCLDWAIT
#define SA_NOCLDWAIT 0x00000002
#endif
#ifndef SA_SIGINFO
#define SA_SIGINFO 0x00000004
#endif
/* 0x00000008 used on alpha, mips, parisc */
/* 0x00000010 used on alpha, parisc */
/* 0x00000020 used on alpha, parisc, sparc */
/* 0x00000040 used on alpha, parisc */
/* 0x00000080 used on parisc */
/* 0x00000100 used on sparc */
/* 0x00000200 used on sparc */
#define SA_UNSUPPORTED 0x00000400
#define SA_EXPOSE_TAGBITS 0x00000800
/* 0x00010000 used on mips */
/* 0x00800000 used for internal SA_IMMUTABLE */
/* 0x01000000 used on x86 */
/* 0x02000000 used on x86 */
/*
* New architectures should not define the obsolete
* SA_RESTORER 0x04000000
*/
#ifndef SA_ONSTACK
#define SA_ONSTACK 0x08000000
#endif
#ifndef SA_RESTART
#define SA_RESTART 0x10000000
#endif
#ifndef SA_NODEFER
#define SA_NODEFER 0x40000000
#endif
#ifndef SA_RESETHAND
#define SA_RESETHAND 0x80000000
#endif
#define SA_NOMASK SA_NODEFER
#define SA_ONESHOT SA_RESETHAND
#ifndef SIG_BLOCK
#define SIG_BLOCK 0 /* for blocking signals */
#endif
#ifndef SIG_UNBLOCK
#define SIG_UNBLOCK 1 /* for unblocking signals */
#endif
#ifndef SIG_SETMASK
#define SIG_SETMASK 2 /* for setting the signal mask */
#endif
#ifndef __ASSEMBLY__
typedef void __signalfn_t(int);
typedef __signalfn_t *__sighandler_t;
typedef void __restorefn_t(void);
typedef __restorefn_t *__sigrestore_t;
#define SIG_DFL ((__sighandler_t)0) /* default signal handling */
#define SIG_IGN ((__sighandler_t)1) /* ignore signal */
#define SIG_ERR ((__sighandler_t)-1) /* error return from signal */
#endif
#endif /* __ASM_GENERIC_SIGNAL_DEFS_H */
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