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1 #ifndef _ASMi386_SIGNAL_H
2 #define _ASMi386_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 /*
74 * SA_FLAGS values:
75 *
76 * SA_ONSTACK indicates that a registered stack_t will be used.
77 * SA_INTERRUPT is a no-op, but left due to historical reasons. Use the
78 * SA_RESTART flag to get restarting signals (which were the default long ago)
79 * SA_NOCLDSTOP flag to turn off SIGCHLD when children stop.
80 * SA_RESETHAND clears the handler when the signal is delivered.
81 * SA_NOCLDWAIT flag on SIGCHLD to inhibit zombies.
82 * SA_NODEFER prevents the current signal from being masked in the handler.
83 *
84 * SA_ONESHOT and SA_NOMASK are the historical Linux names for the Single
85 * Unix names RESETHAND and NODEFER respectively.
86 */
87 #define SA_NOCLDSTOP 0x00000001
88 #define SA_NOCLDWAIT 0x00000002 /* not supported yet */
89 #define SA_SIGINFO 0x00000004
90 #define SA_ONSTACK 0x08000000
91 #define SA_RESTART 0x10000000
92 #define SA_NODEFER 0x40000000
93 #define SA_RESETHAND 0x80000000
94
95 #define SA_NOMASK SA_NODEFER
96 #define SA_ONESHOT SA_RESETHAND
97 #define SA_INTERRUPT 0x20000000 /* dummy -- ignored */
98
99 #define SA_RESTORER 0x04000000
100
101 /*
102 * sigaltstack controls
103 */
104 #define SS_ONSTACK 1
105 #define SS_DISABLE 2
106
107 #define MINSIGSTKSZ 2048
108 #define SIGSTKSZ 8192
109
110 #ifdef __KERNEL__
111
112 /*
113 * These values of sa_flags are used only by the kernel as part of the
114 * irq handling routines.
115 *
116 * SA_INTERRUPT is also used by the irq handling routines.
117 * SA_SHIRQ is for shared interrupt support on PCI and EISA.
118 */
119 #define SA_PROBE SA_ONESHOT
120 #define SA_SAMPLE_RANDOM SA_RESTART
121 #define SA_SHIRQ 0x04000000
122 #endif
123
124 #define SIG_BLOCK 0 /* for blocking signals */
125 #define SIG_UNBLOCK 1 /* for unblocking signals */
126 #define SIG_SETMASK 2 /* for setting the signal mask */
127
128 /* Type of a signal handler. */
129 typedef void (*__sighandler_t)(int);
130
131 #define SIG_DFL ((__sighandler_t)0) /* default signal handling */
132 #define SIG_IGN ((__sighandler_t)1) /* ignore signal */
133 #define SIG_ERR ((__sighandler_t)-1) /* error return from signal */
134
135 #ifdef __KERNEL__
136 struct old_sigaction {
137 __sighandler_t sa_handler;
138 old_sigset_t sa_mask;
139 unsigned long sa_flags;
140 void (*sa_restorer)(void);
141 };
142
143 struct sigaction {
144 __sighandler_t sa_handler;
145 unsigned long sa_flags;
146 void (*sa_restorer)(void);
147 sigset_t sa_mask; /* mask last for extensibility */
148 };
149
150 struct k_sigaction {
151 struct sigaction sa;
152 };
153 #else
154 /* Here we must cater to libcs that poke about in kernel headers. */
155
156 struct sigaction {
157 union {
158 __sighandler_t _sa_handler;
159 void (*_sa_sigaction)(int, struct siginfo *, void *);
160 } _u;
161 sigset_t sa_mask;
162 unsigned long sa_flags;
163 void (*sa_restorer)(void);
164 };
165
166 #define sa_handler _u._sa_handler
167 #define sa_sigaction _u._sa_sigaction
168
169 #endif /* __KERNEL__ */
170
171 typedef struct sigaltstack {
172 void *ss_sp;
173 int ss_flags;
174 size_t ss_size;
175 } stack_t;
176
177 #ifdef __KERNEL__
178 #include <asm/sigcontext.h>
179
180 #define __HAVE_ARCH_SIG_BITOPS
181
182 static __inline__ void sigaddset(sigset_t *set, int _sig)
183 {
184 __asm__("btsl %1,%0" : "=m"(*set) : "Ir"(_sig - 1) : "cc");
185 }
186
187 static __inline__ void sigdelset(sigset_t *set, int _sig)
188 {
189 __asm__("btrl %1,%0" : "=m"(*set) : "Ir"(_sig - 1) : "cc");
190 }
191
192 static __inline__ int __const_sigismember(sigset_t *set, int _sig)
193 {
194 unsigned long sig = _sig - 1;
195 return 1 & (set->sig[sig / _NSIG_BPW] >> (sig % _NSIG_BPW));
196 }
197
198 static __inline__ int __gen_sigismember(sigset_t *set, int _sig)
199 {
200 int ret;
201 __asm__("btl %2,%1\n\tsbbl %0,%0"
202 : "=r"(ret) : "m"(*set), "Ir"(_sig-1) : "cc");
203 return ret;
204 }
205
206 #define sigismember(set,sig) \
207 (__builtin_constant_p(sig) ? \
208 __const_sigismember((set),(sig)) : \
209 __gen_sigismember((set),(sig)))
210
211 #define sigmask(sig) (1UL << ((sig) - 1))
212
213 static __inline__ int sigfindinword(unsigned long word)
214 {
215 __asm__("bsfl %1,%0" : "=r"(word) : "rm"(word) : "cc");
216 return word;
217 }
218
219 #endif /* __KERNEL__ */
220
221 #endif