1 #ifndef _ASM_X86_SIGNAL_H
2 #define _ASM_X86_SIGNAL_H
3
4 #ifndef __ASSEMBLY__
5 #include <linux/types.h>
6 #include <linux/time.h>
7 #include <linux/compiler.h>
8
9 /* Avoid too many header ordering problems. */
10 struct siginfo;
11
12 #ifdef __KERNEL__
13 #include <linux/linkage.h>
14
15 /* Most things should be clean enough to redefine this at will, if care
16 is taken to make libc match. */
17
18 #define _NSIG 64
19
20 #ifdef __i386__
21 # define _NSIG_BPW 32
22 #else
23 # define _NSIG_BPW 64
24 #endif
25
26 #define _NSIG_WORDS (_NSIG / _NSIG_BPW)
27
28 typedef unsigned long old_sigset_t; /* at least 32 bits */
29
30 typedef struct {
31 unsigned long sig[_NSIG_WORDS];
32 } sigset_t;
33
34 #else
35 /* Here we must cater to libcs that poke about in kernel headers. */
36
37 #define NSIG 32
38 typedef unsigned long sigset_t;
39
40 #endif /* __KERNEL__ */
41 #endif /* __ASSEMBLY__ */
42
43 #define SIGHUP 1
44 #define SIGINT 2
45 #define SIGQUIT 3
46 #define SIGILL 4
47 #define SIGTRAP 5
48 #define SIGABRT 6
49 #define SIGIOT 6
50 #define SIGBUS 7
51 #define SIGFPE 8
52 #define SIGKILL 9
53 #define SIGUSR1 10
54 #define SIGSEGV 11
55 #define SIGUSR2 12
56 #define SIGPIPE 13
57 #define SIGALRM 14
58 #define SIGTERM 15
59 #define SIGSTKFLT 16
60 #define SIGCHLD 17
61 #define SIGCONT 18
62 #define SIGSTOP 19
63 #define SIGTSTP 20
64 #define SIGTTIN 21
65 #define SIGTTOU 22
66 #define SIGURG 23
67 #define SIGXCPU 24
68 #define SIGXFSZ 25
69 #define SIGVTALRM 26
70 #define SIGPROF 27
71 #define SIGWINCH 28
72 #define SIGIO 29
73 #define SIGPOLL SIGIO
74 /*
75 #define SIGLOST 29
76 */
77 #define SIGPWR 30
78 #define SIGSYS 31
79 #define SIGUNUSED 31
80
81 /* These should not be considered constants from userland. */
82 #define SIGRTMIN 32
83 #define SIGRTMAX _NSIG
84
85 /*
86 * SA_FLAGS values:
87 *
88 * SA_ONSTACK indicates that a registered stack_t will be used.
89 * SA_RESTART flag to get restarting signals (which were the default long ago)
90 * SA_NOCLDSTOP flag to turn off SIGCHLD when children stop.
91 * SA_RESETHAND clears the handler when the signal is delivered.
92 * SA_NOCLDWAIT flag on SIGCHLD to inhibit zombies.
93 * SA_NODEFER prevents the current signal from being masked in the handler.
94 *
95 * SA_ONESHOT and SA_NOMASK are the historical Linux names for the Single
96 * Unix names RESETHAND and NODEFER respectively.
97 */
98 #define SA_NOCLDSTOP 0x00000001u
99 #define SA_NOCLDWAIT 0x00000002u
100 #define SA_SIGINFO 0x00000004u
101 #define SA_ONSTACK 0x08000000u
102 #define SA_RESTART 0x10000000u
103 #define SA_NODEFER 0x40000000u
104 #define SA_RESETHAND 0x80000000u
105
106 #define SA_NOMASK SA_NODEFER
107 #define SA_ONESHOT SA_RESETHAND
108
109 #define SA_RESTORER 0x04000000
110
111 /*
112 * sigaltstack controls
113 */
114 #define SS_ONSTACK 1
115 #define SS_DISABLE 2
116
117 #define MINSIGSTKSZ 2048
118 #define SIGSTKSZ 8192
119
120 #include <asm-generic/signal.h>
121
122 #ifndef __ASSEMBLY__
123
124 #ifdef __i386__
125 # ifdef __KERNEL__
126 struct old_sigaction {
127 __sighandler_t sa_handler;
128 old_sigset_t sa_mask;
129 unsigned long sa_flags;
130 __sigrestore_t sa_restorer;
131 };
132
133 struct sigaction {
134 __sighandler_t sa_handler;
135 unsigned long sa_flags;
136 __sigrestore_t sa_restorer;
137 sigset_t sa_mask; /* mask last for extensibility */
138 };
139
140 struct k_sigaction {
141 struct sigaction sa;
142 };
143 # else /* __KERNEL__ */
144 /* Here we must cater to libcs that poke about in kernel headers. */
145
146 struct sigaction {
147 union {
148 __sighandler_t _sa_handler;
149 void (*_sa_sigaction)(int, struct siginfo *, void *);
150 } _u;
151 sigset_t sa_mask;
152 unsigned long sa_flags;
153 void (*sa_restorer)(void);
154 };
155
156 #define sa_handler _u._sa_handler
157 #define sa_sigaction _u._sa_sigaction
158
159 # endif /* ! __KERNEL__ */
160 #else /* __i386__ */
161
162 struct sigaction {
163 __sighandler_t sa_handler;
164 unsigned long sa_flags;
165 __sigrestore_t sa_restorer;
166 sigset_t sa_mask; /* mask last for extensibility */
167 };
168
169 struct k_sigaction {
170 struct sigaction sa;
171 };
172
173 #endif /* !__i386__ */
174
175 typedef struct sigaltstack {
176 void __user *ss_sp;
177 int ss_flags;
178 size_t ss_size;
179 } stack_t;
180
181 #ifdef __KERNEL__
182 #include <asm/sigcontext.h>
183
184 #ifdef __386__
185
186 #define __HAVE_ARCH_SIG_BITOPS
187
188 #define sigaddset(set,sig) \
189 (__builtin_constantp(sig) ? \
190 __const_sigaddset((set),(sig)) : \
191 __gen_sigaddset((set),(sig)))
192
193 static __inline__ void __gen_sigaddset(sigset_t *set, int _sig)
194 {
195 __asm__("btsl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
196 }
197
198 static __inline__ void __const_sigaddset(sigset_t *set, int _sig)
199 {
200 unsigned long sig = _sig - 1;
201 set->sig[sig / _NSIG_BPW] |= 1 << (sig % _NSIG_BPW);
202 }
203
204 #define sigdelset(set,sig) \
205 (__builtin_constant_p(sig) ? \
206 __const_sigdelset((set),(sig)) : \
207 __gen_sigdelset((set),(sig)))
208
209
210 static __inline__ void __gen_sigdelset(sigset_t *set, int _sig)
211 {
212 __asm__("btrl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
213 }
214
215 static __inline__ void __const_sigdelset(sigset_t *set, int _sig)
216 {
217 unsigned long sig = _sig - 1;
218 set->sig[sig / _NSIG_BPW] &= ~(1 << (sig % _NSIG_BPW));
219 }
220
221 static __inline__ int __const_sigismember(sigset_t *set, int _sig)
222 {
223 unsigned long sig = _sig - 1;
224 return 1 & (set->sig[sig / _NSIG_BPW] >> (sig % _NSIG_BPW));
225 }
226
227 static __inline__ int __gen_sigismember(sigset_t *set, int _sig)
228 {
229 int ret;
230 __asm__("btl %2,%1\n\tsbbl %0,%0"
231 : "=r"(ret) : "m"(*set), "Ir"(_sig-1) : "cc");
232 return ret;
233 }
234
235 #define sigismember(set,sig) \
236 (__builtin_constant_p(sig) ? \
237 __const_sigismember((set),(sig)) : \
238 __gen_sigismember((set),(sig)))
239
240 static __inline__ int sigfindinword(unsigned long word)
241 {
242 __asm__("bsfl %1,%0" : "=r"(word) : "rm"(word) : "cc");
243 return word;
244 }
245
246 struct pt_regs;
247
248 #else /* __i386__ */
249
250 #undef __HAVE_ARCH_SIG_BITOPS
251
252 #endif /* !__i386__ */
253
254 #define ptrace_signal_deliver(regs, cookie) do { } while (0)
255
256 #endif /* __KERNEL__ */
257 #endif /* __ASSEMBLY__ */
258
259 #endif
260
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