linux-headers (unknown)
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
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 *__sighandler_t;
84
85 typedef void __restorefn_t(void);
86 typedef __restorefn_t *__sigrestore_t;
87
88 #define SIG_DFL ((__sighandler_t)0) /* default signal handling */
89 #define SIG_IGN ((__sighandler_t)1) /* ignore signal */
90 #define SIG_ERR ((__sighandler_t)-1) /* error return from signal */
91 #endif
92
93 #endif /* __ASM_GENERIC_SIGNAL_DEFS_H */
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