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signal.h
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1 /*
2  * This file is subject to the terms and conditions of the GNU General Public
3  * License. See the file "COPYING" in the main directory of this archive
4  * for more details.
5  *
6  * Copyright (C) 1995, 96, 97, 98, 99, 2003 by Ralf Baechle
7  * Copyright (C) 1999 Silicon Graphics, Inc.
8  */
9 #ifndef _UAPI_ASM_SIGNAL_H
10 #define _UAPI_ASM_SIGNAL_H
11 
12 #include <linux/types.h>
13 
14 #define _NSIG 128
15 #define _NSIG_BPW (sizeof(unsigned long) * 8)
16 #define _NSIG_WORDS (_NSIG / _NSIG_BPW)
17 
18 typedef struct {
19  unsigned long sig[_NSIG_WORDS];
20 } sigset_t;
21 
22 typedef unsigned long old_sigset_t; /* at least 32 bits */
23 
24 #define SIGHUP 1 /* Hangup (POSIX). */
25 #define SIGINT 2 /* Interrupt (ANSI). */
26 #define SIGQUIT 3 /* Quit (POSIX). */
27 #define SIGILL 4 /* Illegal instruction (ANSI). */
28 #define SIGTRAP 5 /* Trace trap (POSIX). */
29 #define SIGIOT 6 /* IOT trap (4.2 BSD). */
30 #define SIGABRT SIGIOT /* Abort (ANSI). */
31 #define SIGEMT 7
32 #define SIGFPE 8 /* Floating-point exception (ANSI). */
33 #define SIGKILL 9 /* Kill, unblockable (POSIX). */
34 #define SIGBUS 10 /* BUS error (4.2 BSD). */
35 #define SIGSEGV 11 /* Segmentation violation (ANSI). */
36 #define SIGSYS 12
37 #define SIGPIPE 13 /* Broken pipe (POSIX). */
38 #define SIGALRM 14 /* Alarm clock (POSIX). */
39 #define SIGTERM 15 /* Termination (ANSI). */
40 #define SIGUSR1 16 /* User-defined signal 1 (POSIX). */
41 #define SIGUSR2 17 /* User-defined signal 2 (POSIX). */
42 #define SIGCHLD 18 /* Child status has changed (POSIX). */
43 #define SIGCLD SIGCHLD /* Same as SIGCHLD (System V). */
44 #define SIGPWR 19 /* Power failure restart (System V). */
45 #define SIGWINCH 20 /* Window size change (4.3 BSD, Sun). */
46 #define SIGURG 21 /* Urgent condition on socket (4.2 BSD). */
47 #define SIGIO 22 /* I/O now possible (4.2 BSD). */
48 #define SIGPOLL SIGIO /* Pollable event occurred (System V). */
49 #define SIGSTOP 23 /* Stop, unblockable (POSIX). */
50 #define SIGTSTP 24 /* Keyboard stop (POSIX). */
51 #define SIGCONT 25 /* Continue (POSIX). */
52 #define SIGTTIN 26 /* Background read from tty (POSIX). */
53 #define SIGTTOU 27 /* Background write to tty (POSIX). */
54 #define SIGVTALRM 28 /* Virtual alarm clock (4.2 BSD). */
55 #define SIGPROF 29 /* Profiling alarm clock (4.2 BSD). */
56 #define SIGXCPU 30 /* CPU limit exceeded (4.2 BSD). */
57 #define SIGXFSZ 31 /* File size limit exceeded (4.2 BSD). */
58 
59 /* These should not be considered constants from userland. */
60 #define SIGRTMIN 32
61 #define SIGRTMAX _NSIG
62 
63 /*
64  * SA_FLAGS values:
65  *
66  * SA_ONSTACK indicates that a registered stack_t will be used.
67  * SA_RESTART flag to get restarting signals (which were the default long ago)
68  * SA_NOCLDSTOP flag to turn off SIGCHLD when children stop.
69  * SA_RESETHAND clears the handler when the signal is delivered.
70  * SA_NOCLDWAIT flag on SIGCHLD to inhibit zombies.
71  * SA_NODEFER prevents the current signal from being masked in the handler.
72  *
73  * SA_ONESHOT and SA_NOMASK are the historical Linux names for the Single
74  * Unix names RESETHAND and NODEFER respectively.
75  */
76 #define SA_ONSTACK 0x08000000
77 #define SA_RESETHAND 0x80000000
78 #define SA_RESTART 0x10000000
79 #define SA_SIGINFO 0x00000008
80 #define SA_NODEFER 0x40000000
81 #define SA_NOCLDWAIT 0x00010000
82 #define SA_NOCLDSTOP 0x00000001
83 
84 #define SA_NOMASK SA_NODEFER
85 #define SA_ONESHOT SA_RESETHAND
86 
87 #define SA_RESTORER 0x04000000 /* Only for o32 */
88 
89 /*
90  * sigaltstack controls
91  */
92 #define SS_ONSTACK 1
93 #define SS_DISABLE 2
94 
95 #define MINSIGSTKSZ 2048
96 #define SIGSTKSZ 8192
97 
98 
99 #define SIG_BLOCK 1 /* for blocking signals */
100 #define SIG_UNBLOCK 2 /* for unblocking signals */
101 #define SIG_SETMASK 3 /* for setting the signal mask */
102 
103 #include <asm-generic/signal-defs.h>
104 
105 struct sigaction {
106  unsigned int sa_flags;
109 };
110 
111 struct k_sigaction {
112  struct sigaction sa;
113 };
114 
115 /* IRIX compatible stack_t */
116 typedef struct sigaltstack {
117  void __user *ss_sp;
118  size_t ss_size;
119  int ss_flags;
120 } stack_t;
121 
122 
123 #endif /* _UAPI_ASM_SIGNAL_H */