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_NOCLDSTOP flag to turn off SIGCHLD when children stop.
79 * SA_NOCLDWAIT flag on SIGCHLD to inhibit zombies.
80 * SA_SIGINFO deliver the signal with SIGINFO structs
81 * SA_THIRTYTWO delivers the signal in 32-bit mode, even if the task
82 * is running in 26-bit.
83 * SA_ONSTACK allows alternate signal stacks (see sigaltstack(2)).
84 * SA_RESTART flag to get restarting signals (which were the default long ago)
85 * SA_INTERRUPT is a no-op, but left due to historical reasons. Use the
86 * SA_NODEFER prevents the current signal from being masked in the handler.
87 * SA_RESETHAND clears the handler when the signal is delivered.
88 *
89 * SA_ONESHOT and SA_NOMASK are the historical Linux names for the Single
90 * Unix names RESETHAND and NODEFER respectively.
91 */
92 #define SA_NOCLDSTOP 0x00000001
93 #define SA_NOCLDWAIT 0x00000002 /* not supported yet */
94 #define SA_SIGINFO 0x00000004
95 #define SA_THIRTYTWO 0x02000000
96 #define SA_RESTORER 0x04000000
97 #define SA_ONSTACK 0x08000000
98 #define SA_RESTART 0x10000000
99 #define SA_NODEFER 0x40000000
100 #define SA_RESETHAND 0x80000000
101
102 #define SA_NOMASK SA_NODEFER
103 #define SA_ONESHOT SA_RESETHAND
104 #define SA_INTERRUPT 0x20000000 /* dummy -- ignored */
105
106
107 /*
108 * sigaltstack controls
109 */
110 #define SS_ONSTACK 1
111 #define SS_DISABLE 2
112
113 #define MINSIGSTKSZ 2048
114 #define SIGSTKSZ 8192
115
116 #ifdef __KERNEL__
117
118 /*
119 * These values of sa_flags are used only by the kernel as part of the
120 * irq handling routines.
121 *
122 * SA_INTERRUPT is also used by the irq handling routines.
123 * SA_SHIRQ is for shared interrupt support on PCI and EISA.
124 */
125 #define SA_PROBE 0x80000000
126 #define SA_SAMPLE_RANDOM 0x10000000
127 #define SA_SHIRQ 0x04000000
128 #endif
129
130 #define SIG_BLOCK 0 /* for blocking signals */
131 #define SIG_UNBLOCK 1 /* for unblocking signals */
132 #define SIG_SETMASK 2 /* for setting the signal mask */
133
134 /* Type of a signal handler. */
135 typedef void (*__sighandler_t)(int);
136
137 #define SIG_DFL ((__sighandler_t)0) /* default signal handling */
138 #define SIG_IGN ((__sighandler_t)1) /* ignore signal */
139 #define SIG_ERR ((__sighandler_t)-1) /* error return from signal */
140
141 #ifdef __KERNEL__
142 struct old_sigaction {
143 __sighandler_t sa_handler;
144 old_sigset_t sa_mask;
145 unsigned long sa_flags;
146 void (*sa_restorer)(void);
147 };
148
149 struct sigaction {
150 __sighandler_t sa_handler;
151 unsigned long sa_flags;
152 void (*sa_restorer)(void);
153 sigset_t sa_mask; /* mask last for extensibility */
154 };
155
156 struct k_sigaction {
157 struct sigaction sa;
158 };
159
160 #else
161 /* Here we must cater to libcs that poke about in kernel headers. */
162
163 struct sigaction {
164 union {
165 __sighandler_t _sa_handler;
166 void (*_sa_sigaction)(int, struct siginfo *, void *);
167 } _u;
168 sigset_t sa_mask;
169 unsigned long sa_flags;
170 void (*sa_restorer)(void);
171 };
172
173 #define sa_handler _u._sa_handler
174 #define sa_sigaction _u._sa_sigaction
175
176 #endif /* __KERNEL__ */
177
178 typedef struct sigaltstack {
179 void *ss_sp;
180 int ss_flags;
181 size_t ss_size;
182 } stack_t;
183
184 #ifdef __KERNEL__
185 #include <asm/sigcontext.h>
186
187 #define sigmask(sig) (1UL << ((sig) - 1))
188
189 #endif
190
191 #endif
192
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