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