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1da177e4 LT |
1 | #ifndef _LINUX_SIGNAL_H |
2 | #define _LINUX_SIGNAL_H | |
3 | ||
1da177e4 LT |
4 | #include <asm/signal.h> |
5 | #include <asm/siginfo.h> | |
6 | ||
7 | #ifdef __KERNEL__ | |
7ab2febd DW |
8 | #include <linux/list.h> |
9 | #include <linux/spinlock.h> | |
1da177e4 | 10 | |
7f261b5f SS |
11 | /* |
12 | * These values of sa_flags are used only by the kernel as part of the | |
13 | * irq handling routines. | |
14 | * | |
15 | * SA_INTERRUPT is also used by the irq handling routines. | |
16 | * SA_SHIRQ is for shared interrupt support on PCI and EISA. | |
13e87ec6 | 17 | * SA_PROBEIRQ is set by callers when they expect sharing mismatches to occur |
7f261b5f | 18 | */ |
7f261b5f SS |
19 | #define SA_SAMPLE_RANDOM SA_RESTART |
20 | #define SA_SHIRQ 0x04000000 | |
13e87ec6 AM |
21 | #define SA_PROBEIRQ 0x08000000 |
22 | ||
9ded96f2 RK |
23 | /* |
24 | * As above, these correspond to the IORESOURCE_IRQ_* defines in | |
25 | * linux/ioport.h to select the interrupt line behaviour. When | |
26 | * requesting an interrupt without specifying a SA_TRIGGER, the | |
27 | * setting should be assumed to be "as already configured", which | |
28 | * may be as per machine or firmware initialisation. | |
29 | */ | |
30 | #define SA_TRIGGER_LOW 0x00000008 | |
31 | #define SA_TRIGGER_HIGH 0x00000004 | |
32 | #define SA_TRIGGER_FALLING 0x00000002 | |
33 | #define SA_TRIGGER_RISING 0x00000001 | |
34 | #define SA_TRIGGER_MASK (SA_TRIGGER_HIGH|SA_TRIGGER_LOW|\ | |
35 | SA_TRIGGER_RISING|SA_TRIGGER_FALLING) | |
7f261b5f | 36 | |
1da177e4 LT |
37 | /* |
38 | * Real Time signals may be queued. | |
39 | */ | |
40 | ||
41 | struct sigqueue { | |
42 | struct list_head list; | |
1da177e4 LT |
43 | int flags; |
44 | siginfo_t info; | |
45 | struct user_struct *user; | |
46 | }; | |
47 | ||
48 | /* flags values. */ | |
49 | #define SIGQUEUE_PREALLOC 1 | |
50 | ||
51 | struct sigpending { | |
52 | struct list_head list; | |
53 | sigset_t signal; | |
54 | }; | |
55 | ||
56 | /* | |
57 | * Define some primitives to manipulate sigset_t. | |
58 | */ | |
59 | ||
60 | #ifndef __HAVE_ARCH_SIG_BITOPS | |
61 | #include <linux/bitops.h> | |
62 | ||
63 | /* We don't use <linux/bitops.h> for these because there is no need to | |
64 | be atomic. */ | |
65 | static inline void sigaddset(sigset_t *set, int _sig) | |
66 | { | |
67 | unsigned long sig = _sig - 1; | |
68 | if (_NSIG_WORDS == 1) | |
69 | set->sig[0] |= 1UL << sig; | |
70 | else | |
71 | set->sig[sig / _NSIG_BPW] |= 1UL << (sig % _NSIG_BPW); | |
72 | } | |
73 | ||
74 | static inline void sigdelset(sigset_t *set, int _sig) | |
75 | { | |
76 | unsigned long sig = _sig - 1; | |
77 | if (_NSIG_WORDS == 1) | |
78 | set->sig[0] &= ~(1UL << sig); | |
79 | else | |
80 | set->sig[sig / _NSIG_BPW] &= ~(1UL << (sig % _NSIG_BPW)); | |
81 | } | |
82 | ||
83 | static inline int sigismember(sigset_t *set, int _sig) | |
84 | { | |
85 | unsigned long sig = _sig - 1; | |
86 | if (_NSIG_WORDS == 1) | |
87 | return 1 & (set->sig[0] >> sig); | |
88 | else | |
89 | return 1 & (set->sig[sig / _NSIG_BPW] >> (sig % _NSIG_BPW)); | |
90 | } | |
91 | ||
92 | static inline int sigfindinword(unsigned long word) | |
93 | { | |
94 | return ffz(~word); | |
95 | } | |
96 | ||
97 | #endif /* __HAVE_ARCH_SIG_BITOPS */ | |
98 | ||
71fabd5e GA |
99 | static inline int sigisemptyset(sigset_t *set) |
100 | { | |
101 | extern void _NSIG_WORDS_is_unsupported_size(void); | |
102 | switch (_NSIG_WORDS) { | |
103 | case 4: | |
104 | return (set->sig[3] | set->sig[2] | | |
105 | set->sig[1] | set->sig[0]) == 0; | |
106 | case 2: | |
107 | return (set->sig[1] | set->sig[0]) == 0; | |
108 | case 1: | |
109 | return set->sig[0] == 0; | |
110 | default: | |
111 | _NSIG_WORDS_is_unsupported_size(); | |
112 | return 0; | |
113 | } | |
114 | } | |
115 | ||
1da177e4 LT |
116 | #define sigmask(sig) (1UL << ((sig) - 1)) |
117 | ||
118 | #ifndef __HAVE_ARCH_SIG_SETOPS | |
119 | #include <linux/string.h> | |
120 | ||
121 | #define _SIG_SET_BINOP(name, op) \ | |
122 | static inline void name(sigset_t *r, const sigset_t *a, const sigset_t *b) \ | |
123 | { \ | |
124 | extern void _NSIG_WORDS_is_unsupported_size(void); \ | |
125 | unsigned long a0, a1, a2, a3, b0, b1, b2, b3; \ | |
126 | \ | |
127 | switch (_NSIG_WORDS) { \ | |
128 | case 4: \ | |
129 | a3 = a->sig[3]; a2 = a->sig[2]; \ | |
130 | b3 = b->sig[3]; b2 = b->sig[2]; \ | |
131 | r->sig[3] = op(a3, b3); \ | |
132 | r->sig[2] = op(a2, b2); \ | |
133 | case 2: \ | |
134 | a1 = a->sig[1]; b1 = b->sig[1]; \ | |
135 | r->sig[1] = op(a1, b1); \ | |
136 | case 1: \ | |
137 | a0 = a->sig[0]; b0 = b->sig[0]; \ | |
138 | r->sig[0] = op(a0, b0); \ | |
139 | break; \ | |
140 | default: \ | |
141 | _NSIG_WORDS_is_unsupported_size(); \ | |
142 | } \ | |
143 | } | |
144 | ||
145 | #define _sig_or(x,y) ((x) | (y)) | |
146 | _SIG_SET_BINOP(sigorsets, _sig_or) | |
147 | ||
148 | #define _sig_and(x,y) ((x) & (y)) | |
149 | _SIG_SET_BINOP(sigandsets, _sig_and) | |
150 | ||
151 | #define _sig_nand(x,y) ((x) & ~(y)) | |
152 | _SIG_SET_BINOP(signandsets, _sig_nand) | |
153 | ||
154 | #undef _SIG_SET_BINOP | |
155 | #undef _sig_or | |
156 | #undef _sig_and | |
157 | #undef _sig_nand | |
158 | ||
159 | #define _SIG_SET_OP(name, op) \ | |
160 | static inline void name(sigset_t *set) \ | |
161 | { \ | |
162 | extern void _NSIG_WORDS_is_unsupported_size(void); \ | |
163 | \ | |
164 | switch (_NSIG_WORDS) { \ | |
165 | case 4: set->sig[3] = op(set->sig[3]); \ | |
166 | set->sig[2] = op(set->sig[2]); \ | |
167 | case 2: set->sig[1] = op(set->sig[1]); \ | |
168 | case 1: set->sig[0] = op(set->sig[0]); \ | |
169 | break; \ | |
170 | default: \ | |
171 | _NSIG_WORDS_is_unsupported_size(); \ | |
172 | } \ | |
173 | } | |
174 | ||
175 | #define _sig_not(x) (~(x)) | |
176 | _SIG_SET_OP(signotset, _sig_not) | |
177 | ||
178 | #undef _SIG_SET_OP | |
179 | #undef _sig_not | |
180 | ||
181 | static inline void sigemptyset(sigset_t *set) | |
182 | { | |
183 | switch (_NSIG_WORDS) { | |
184 | default: | |
185 | memset(set, 0, sizeof(sigset_t)); | |
186 | break; | |
187 | case 2: set->sig[1] = 0; | |
188 | case 1: set->sig[0] = 0; | |
189 | break; | |
190 | } | |
191 | } | |
192 | ||
193 | static inline void sigfillset(sigset_t *set) | |
194 | { | |
195 | switch (_NSIG_WORDS) { | |
196 | default: | |
197 | memset(set, -1, sizeof(sigset_t)); | |
198 | break; | |
199 | case 2: set->sig[1] = -1; | |
200 | case 1: set->sig[0] = -1; | |
201 | break; | |
202 | } | |
203 | } | |
204 | ||
205 | /* Some extensions for manipulating the low 32 signals in particular. */ | |
206 | ||
207 | static inline void sigaddsetmask(sigset_t *set, unsigned long mask) | |
208 | { | |
209 | set->sig[0] |= mask; | |
210 | } | |
211 | ||
212 | static inline void sigdelsetmask(sigset_t *set, unsigned long mask) | |
213 | { | |
214 | set->sig[0] &= ~mask; | |
215 | } | |
216 | ||
217 | static inline int sigtestsetmask(sigset_t *set, unsigned long mask) | |
218 | { | |
219 | return (set->sig[0] & mask) != 0; | |
220 | } | |
221 | ||
222 | static inline void siginitset(sigset_t *set, unsigned long mask) | |
223 | { | |
224 | set->sig[0] = mask; | |
225 | switch (_NSIG_WORDS) { | |
226 | default: | |
227 | memset(&set->sig[1], 0, sizeof(long)*(_NSIG_WORDS-1)); | |
228 | break; | |
229 | case 2: set->sig[1] = 0; | |
230 | case 1: ; | |
231 | } | |
232 | } | |
233 | ||
234 | static inline void siginitsetinv(sigset_t *set, unsigned long mask) | |
235 | { | |
236 | set->sig[0] = ~mask; | |
237 | switch (_NSIG_WORDS) { | |
238 | default: | |
239 | memset(&set->sig[1], -1, sizeof(long)*(_NSIG_WORDS-1)); | |
240 | break; | |
241 | case 2: set->sig[1] = -1; | |
242 | case 1: ; | |
243 | } | |
244 | } | |
245 | ||
246 | #endif /* __HAVE_ARCH_SIG_SETOPS */ | |
247 | ||
248 | static inline void init_sigpending(struct sigpending *sig) | |
249 | { | |
250 | sigemptyset(&sig->signal); | |
251 | INIT_LIST_HEAD(&sig->list); | |
252 | } | |
253 | ||
6a14c5c9 ON |
254 | extern void flush_sigqueue(struct sigpending *queue); |
255 | ||
e5bdd883 JJ |
256 | /* Test if 'sig' is valid signal. Use this instead of testing _NSIG directly */ |
257 | static inline int valid_signal(unsigned long sig) | |
258 | { | |
259 | return sig <= _NSIG ? 1 : 0; | |
260 | } | |
261 | ||
1da177e4 LT |
262 | extern int group_send_sig_info(int sig, struct siginfo *info, struct task_struct *p); |
263 | extern int __group_send_sig_info(int, struct siginfo *, struct task_struct *); | |
264 | extern long do_sigpending(void __user *, unsigned long); | |
265 | extern int sigprocmask(int, sigset_t *, sigset_t *); | |
266 | ||
1da177e4 LT |
267 | struct pt_regs; |
268 | extern int get_signal_to_deliver(siginfo_t *info, struct k_sigaction *return_ka, struct pt_regs *regs, void *cookie); | |
1da177e4 LT |
269 | |
270 | #endif /* __KERNEL__ */ | |
271 | ||
272 | #endif /* _LINUX_SIGNAL_H */ |