1 #ifndef _ASMARM_SIGNAL_H
2 #define _ASMARM_SIGNAL_H
3
4 #include <linux/types.h>
5
6 /* Avoid too many header ordering problems. */
7 struct siginfo;
8
9 #ifdef __KERNEL__
10 /* Most things should be clean enough to redefine this at will, if care
11 is taken to make libc match. */
12
13 #define _NSIG 64
14 #define _NSIG_BPW 32
15 #define _NSIG_WORDS (_NSIG / _NSIG_BPW)
16
17 typedef unsigned long old_sigset_t; /* at least 32 bits */
18
19 typedef struct {
20 unsigned long sig[_NSIG_WORDS];
21 } sigset_t;
22
23 #else
24 /* Here we must cater to libcs that poke about in kernel headers. */
25
26 #define NSIG 32
27 typedef unsigned long sigset_t;
28
29 #endif /* __KERNEL__ */
30
31 #define SIGHUP 1
32 #define SIGINT 2
33 #define SIGQUIT 3
34 #define SIGILL 4
35 #define SIGTRAP 5
36 #define SIGABRT 6
37 #define SIGIOT 6
38 #define SIGBUS 7
39 #define SIGFPE 8
40 #define SIGKILL 9
41 #define SIGUSR1 10
42 #define SIGSEGV 11
43 #define SIGUSR2 12
44 #define SIGPIPE 13
45 #define SIGALRM 14
46 #define SIGTERM 15
47 #define SIGSTKFLT 16
48 #define SIGCHLD 17
49 #define SIGCONT 18
50 #define SIGSTOP 19
51 #define SIGTSTP 20
52 #define SIGTTIN 21
53 #define SIGTTOU 22
54 #define SIGURG 23
55 #define SIGXCPU 24
56 #define SIGXFSZ 25
57 #define SIGVTALRM 26
58 #define SIGPROF 27
59 #define SIGWINCH 28
60 #define SIGIO 29
61 #define SIGPOLL SIGIO
62 /*
63 #define SIGLOST 29
64 */
65 #define SIGPWR 30
66 #define SIGSYS 31
67 #define SIGUNUSED 31
68
69 /* These should not be considered constants from userland. */
70 #define SIGRTMIN 32
71 #define SIGRTMAX (_NSIG-1)
72
73 #define SIGSWI 32
74
75 /*
76 * SA_FLAGS values:
77 *
78 * SA_ONSTACK is not currently supported, but will allow sigaltstack(2).
79 * SA_INTERRUPT is a no-op, but left due to historical reasons. Use the
80 * SA_RESTART flag to get restarting signals (which were the default long ago)
81 * SA_NOCLDSTOP flag to turn off SIGCHLD when children stop.
82 * SA_RESETHAND clears the handler when the signal is delivered.
83 * SA_NOCLDWAIT flag on SIGCHLD to inhibit zombies.
84 * SA_NODEFER prevents the current signal from being masked in the handler.
85 *
86 * SA_ONESHOT and SA_NOMASK are the historical Linux names for the Single
87 * Unix names RESETHAND and NODEFER respectively.
88 */
89 #define SA_NOCLDSTOP 0x00000001
90 #define SA_NOCLDWAIT 0x00000002 /* not supported yet */
91 #define SA_SIGINFO 0x00000004
92 #define SA_ONSTACK 0x08000000
93 #define SA_RESTART 0x10000000
94 #define SA_NODEFER 0x40000000
95 #define SA_RESETHAND 0x80000000
96
97 #define SA_NOMASK SA_NODEFER
98 #define SA_ONESHOT SA_RESETHAND
99 #define SA_INTERRUPT 0x20000000 /* dummy -- ignored */
100
101 #define SA_RESTORER 0x04000000
102 #define SA_THIRTYTWO 0x02000000 /* deliver signal in 32-bit mode even if
103 task is running 26 bits. */
104
105 /*
106 * sigaltstack controls
107 */
108 #define SS_ONSTACK 1
109 #define SS_DISABLE 2
110
111 #define MINSIGSTKSZ 2048
112 #define SIGSTKSZ 8192
113
114 #ifdef __KERNEL__
115
116 /*
117 * These values of sa_flags are used only by the kernel as part of the
118 * irq handling routines.
119 *
120 * SA_INTERRUPT is also used by the irq handling routines.
121 * SA_SHIRQ is for shared interrupt support on PCI and EISA.
122 */
123 #define SA_PROBE 0x80000000
124 #define SA_SAMPLE_RANDOM 0x10000000
125 #define SA_IRQNOMASK 0x08000000
126 #define SA_SHIRQ 0x04000000
127 #endif
128
129 #define SIG_BLOCK 0 /* for blocking signals */
130 #define SIG_UNBLOCK 1 /* for unblocking signals */
131 #define SIG_SETMASK 2 /* for setting the signal mask */
132
133 /* Type of a signal handler. */
134 typedef void (*__sighandler_t)(int);
135
136 #define SIG_DFL ((__sighandler_t)0) /* default signal handling */
137 #define SIG_IGN ((__sighandler_t)1) /* ignore signal */
138 #define SIG_ERR ((__sighandler_t)-1) /* error return from signal */
139
140 #ifdef __KERNEL__
141 struct old_sigaction {
142 __sighandler_t sa_handler;
143 old_sigset_t sa_mask;
144 unsigned long sa_flags;
145 void (*sa_restorer)(void);
146 };
147
148 struct sigaction {
149 __sighandler_t sa_handler;
150 unsigned long sa_flags;
151 void (*sa_restorer)(void);
152 sigset_t sa_mask; /* mask last for extensibility */
153 };
154
155 struct k_sigaction {
156 struct sigaction sa;
157 };
158
159 #else
160 /* Here we must cater to libcs that poke about in kernel headers. */
161
162 struct sigaction {
163 union {
164 __sighandler_t _sa_handler;
165 void (*_sa_sigaction)(int, struct siginfo *, void *);
166 } _u;
167 sigset_t sa_mask;
168 unsigned long sa_flags;
169 void (*sa_restorer)(void);
170 };
171
172 #define sa_handler _u._sa_handler
173 #define sa_sigaction _u._sa_sigaction
174
175 #endif /* __KERNEL__ */
176
177 typedef struct sigaltstack {
178 void *ss_sp;
179 int ss_flags;
180 size_t ss_size;
181 } stack_t;
182
183 #ifdef __KERNEL__
184 #include <asm/sigcontext.h>
185
186 #define sigmask(sig) (1UL << ((sig) - 1))
187
188 #endif
189
190 #endif
191
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