1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 /*
3 * This file is subject to the terms and conditions of the GNU General Public
4 * License. See the file "COPYING" in the main directory of this archive
5 * for more details.
6 *
7 * Copyright (C) 1995, 96, 97, 98, 99, 2003 by Ralf Baechle
8 * Copyright (C) 1999 Silicon Graphics, Inc.
9 */
10 #ifndef _UAPI_ASM_SIGNAL_H
11 #define _UAPI_ASM_SIGNAL_H
12
13 #include <linux/types.h>
14
15 #define _NSIG 128
16 #define _NSIG_BPW (sizeof(unsigned long) * 8)
17 #define _NSIG_WORDS (_NSIG / _NSIG_BPW)
18
19 typedef struct {
20 unsigned long sig[_NSIG_WORDS];
21 } sigset_t;
22
23 typedef unsigned long old_sigset_t; /* at least 32 bits */
24
25 #define SIGHUP 1 /* Hangup (POSIX). */
26 #define SIGINT 2 /* Interrupt (ANSI). */
27 #define SIGQUIT 3 /* Quit (POSIX). */
28 #define SIGILL 4 /* Illegal instruction (ANSI). */
29 #define SIGTRAP 5 /* Trace trap (POSIX). */
30 #define SIGIOT 6 /* IOT trap (4.2 BSD). */
31 #define SIGABRT SIGIOT /* Abort (ANSI). */
32 #define SIGEMT 7
33 #define SIGFPE 8 /* Floating-point exception (ANSI). */
34 #define SIGKILL 9 /* Kill, unblockable (POSIX). */
35 #define SIGBUS 10 /* BUS error (4.2 BSD). */
36 #define SIGSEGV 11 /* Segmentation violation (ANSI). */
37 #define SIGSYS 12
38 #define SIGPIPE 13 /* Broken pipe (POSIX). */
39 #define SIGALRM 14 /* Alarm clock (POSIX). */
40 #define SIGTERM 15 /* Termination (ANSI). */
41 #define SIGUSR1 16 /* User-defined signal 1 (POSIX). */
42 #define SIGUSR2 17 /* User-defined signal 2 (POSIX). */
43 #define SIGCHLD 18 /* Child status has changed (POSIX). */
44 #define SIGCLD SIGCHLD /* Same as SIGCHLD (System V). */
45 #define SIGPWR 19 /* Power failure restart (System V). */
46 #define SIGWINCH 20 /* Window size change (4.3 BSD, Sun). */
47 #define SIGURG 21 /* Urgent condition on socket (4.2 BSD). */
48 #define SIGIO 22 /* I/O now possible (4.2 BSD). */
49 #define SIGPOLL SIGIO /* Pollable event occurred (System V). */
50 #define SIGSTOP 23 /* Stop, unblockable (POSIX). */
51 #define SIGTSTP 24 /* Keyboard stop (POSIX). */
52 #define SIGCONT 25 /* Continue (POSIX). */
53 #define SIGTTIN 26 /* Background read from tty (POSIX). */
54 #define SIGTTOU 27 /* Background write to tty (POSIX). */
55 #define SIGVTALRM 28 /* Virtual alarm clock (4.2 BSD). */
56 #define SIGPROF 29 /* Profiling alarm clock (4.2 BSD). */
57 #define SIGXCPU 30 /* CPU limit exceeded (4.2 BSD). */
58 #define SIGXFSZ 31 /* File size limit exceeded (4.2 BSD). */
59
60 /* These should not be considered constants from userland. */
61 #define SIGRTMIN 32
62 #define SIGRTMAX _NSIG
63
64 /*
65 * SA_FLAGS values:
66 *
67 * SA_ONSTACK indicates that a registered stack_t will be used.
68 * SA_RESTART flag to get restarting signals (which were the default long ago)
69 * SA_NOCLDSTOP flag to turn off SIGCHLD when children stop.
70 * SA_RESETHAND clears the handler when the signal is delivered.
71 * SA_NOCLDWAIT flag on SIGCHLD to inhibit zombies.
72 * SA_NODEFER prevents the current signal from being masked in the handler.
73 *
74 * SA_ONESHOT and SA_NOMASK are the historical Linux names for the Single
75 * Unix names RESETHAND and NODEFER respectively.
76 *
77 * SA_RESTORER used to be defined as 0x04000000 but only the O32 ABI ever
78 * supported its use and no libc was using it, so the entire sa-restorer
79 * functionality was removed with lmo commit 39bffc12c3580ab for 2.5.48
80 * retaining only the SA_RESTORER definition as a reminder to avoid
81 * accidental reuse of the mask bit.
82 */
83 #define SA_ONSTACK 0x08000000
84 #define SA_RESETHAND 0x80000000
85 #define SA_RESTART 0x10000000
86 #define SA_SIGINFO 0x00000008
87 #define SA_NODEFER 0x40000000
88 #define SA_NOCLDWAIT 0x00010000
89 #define SA_NOCLDSTOP 0x00000001
90
91 #define SA_NOMASK SA_NODEFER
92 #define SA_ONESHOT SA_RESETHAND
93
94 #define MINSIGSTKSZ 2048
95 #define SIGSTKSZ 8192
96
97
98 #define SIG_BLOCK 1 /* for blocking signals */
99 #define SIG_UNBLOCK 2 /* for unblocking signals */
100 #define SIG_SETMASK 3 /* for setting the signal mask */
101
102 #include <asm-generic/signal-defs.h>
103
104 #ifndef __KERNEL__
105 struct sigaction {
106 unsigned int sa_flags;
107 __sighandler_t sa_handler;
108 sigset_t sa_mask;
109 };
110 #endif
111
112 /* IRIX compatible stack_t */
113 typedef struct sigaltstack {
114 void __user *ss_sp;
115 size_t ss_size;
116 int ss_flags;
117 } stack_t;
118
119
120 #endif /* _UAPI_ASM_SIGNAL_H */