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