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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 LT |
10 | |
11 | /* | |
12 | * Real Time signals may be queued. | |
13 | */ | |
14 | ||
15 | struct sigqueue { | |
16 | struct list_head list; | |
1da177e4 LT |
17 | int flags; |
18 | siginfo_t info; | |
19 | struct user_struct *user; | |
20 | }; | |
21 | ||
22 | /* flags values. */ | |
23 | #define SIGQUEUE_PREALLOC 1 | |
24 | ||
25 | struct sigpending { | |
26 | struct list_head list; | |
27 | sigset_t signal; | |
28 | }; | |
29 | ||
30 | /* | |
31 | * Define some primitives to manipulate sigset_t. | |
32 | */ | |
33 | ||
34 | #ifndef __HAVE_ARCH_SIG_BITOPS | |
35 | #include <linux/bitops.h> | |
36 | ||
37 | /* We don't use <linux/bitops.h> for these because there is no need to | |
38 | be atomic. */ | |
39 | static inline void sigaddset(sigset_t *set, int _sig) | |
40 | { | |
41 | unsigned long sig = _sig - 1; | |
42 | if (_NSIG_WORDS == 1) | |
43 | set->sig[0] |= 1UL << sig; | |
44 | else | |
45 | set->sig[sig / _NSIG_BPW] |= 1UL << (sig % _NSIG_BPW); | |
46 | } | |
47 | ||
48 | static inline void sigdelset(sigset_t *set, int _sig) | |
49 | { | |
50 | unsigned long sig = _sig - 1; | |
51 | if (_NSIG_WORDS == 1) | |
52 | set->sig[0] &= ~(1UL << sig); | |
53 | else | |
54 | set->sig[sig / _NSIG_BPW] &= ~(1UL << (sig % _NSIG_BPW)); | |
55 | } | |
56 | ||
57 | static inline int sigismember(sigset_t *set, int _sig) | |
58 | { | |
59 | unsigned long sig = _sig - 1; | |
60 | if (_NSIG_WORDS == 1) | |
61 | return 1 & (set->sig[0] >> sig); | |
62 | else | |
63 | return 1 & (set->sig[sig / _NSIG_BPW] >> (sig % _NSIG_BPW)); | |
64 | } | |
65 | ||
66 | static inline int sigfindinword(unsigned long word) | |
67 | { | |
68 | return ffz(~word); | |
69 | } | |
70 | ||
71 | #endif /* __HAVE_ARCH_SIG_BITOPS */ | |
72 | ||
71fabd5e GA |
73 | static inline int sigisemptyset(sigset_t *set) |
74 | { | |
75 | extern void _NSIG_WORDS_is_unsupported_size(void); | |
76 | switch (_NSIG_WORDS) { | |
77 | case 4: | |
78 | return (set->sig[3] | set->sig[2] | | |
79 | set->sig[1] | set->sig[0]) == 0; | |
80 | case 2: | |
81 | return (set->sig[1] | set->sig[0]) == 0; | |
82 | case 1: | |
83 | return set->sig[0] == 0; | |
84 | default: | |
85 | _NSIG_WORDS_is_unsupported_size(); | |
86 | return 0; | |
87 | } | |
88 | } | |
89 | ||
1da177e4 LT |
90 | #define sigmask(sig) (1UL << ((sig) - 1)) |
91 | ||
92 | #ifndef __HAVE_ARCH_SIG_SETOPS | |
93 | #include <linux/string.h> | |
94 | ||
95 | #define _SIG_SET_BINOP(name, op) \ | |
96 | static inline void name(sigset_t *r, const sigset_t *a, const sigset_t *b) \ | |
97 | { \ | |
98 | extern void _NSIG_WORDS_is_unsupported_size(void); \ | |
99 | unsigned long a0, a1, a2, a3, b0, b1, b2, b3; \ | |
100 | \ | |
101 | switch (_NSIG_WORDS) { \ | |
102 | case 4: \ | |
103 | a3 = a->sig[3]; a2 = a->sig[2]; \ | |
104 | b3 = b->sig[3]; b2 = b->sig[2]; \ | |
105 | r->sig[3] = op(a3, b3); \ | |
106 | r->sig[2] = op(a2, b2); \ | |
107 | case 2: \ | |
108 | a1 = a->sig[1]; b1 = b->sig[1]; \ | |
109 | r->sig[1] = op(a1, b1); \ | |
110 | case 1: \ | |
111 | a0 = a->sig[0]; b0 = b->sig[0]; \ | |
112 | r->sig[0] = op(a0, b0); \ | |
113 | break; \ | |
114 | default: \ | |
115 | _NSIG_WORDS_is_unsupported_size(); \ | |
116 | } \ | |
117 | } | |
118 | ||
119 | #define _sig_or(x,y) ((x) | (y)) | |
120 | _SIG_SET_BINOP(sigorsets, _sig_or) | |
121 | ||
122 | #define _sig_and(x,y) ((x) & (y)) | |
123 | _SIG_SET_BINOP(sigandsets, _sig_and) | |
124 | ||
125 | #define _sig_nand(x,y) ((x) & ~(y)) | |
126 | _SIG_SET_BINOP(signandsets, _sig_nand) | |
127 | ||
128 | #undef _SIG_SET_BINOP | |
129 | #undef _sig_or | |
130 | #undef _sig_and | |
131 | #undef _sig_nand | |
132 | ||
133 | #define _SIG_SET_OP(name, op) \ | |
134 | static inline void name(sigset_t *set) \ | |
135 | { \ | |
136 | extern void _NSIG_WORDS_is_unsupported_size(void); \ | |
137 | \ | |
138 | switch (_NSIG_WORDS) { \ | |
139 | case 4: set->sig[3] = op(set->sig[3]); \ | |
140 | set->sig[2] = op(set->sig[2]); \ | |
141 | case 2: set->sig[1] = op(set->sig[1]); \ | |
142 | case 1: set->sig[0] = op(set->sig[0]); \ | |
143 | break; \ | |
144 | default: \ | |
145 | _NSIG_WORDS_is_unsupported_size(); \ | |
146 | } \ | |
147 | } | |
148 | ||
149 | #define _sig_not(x) (~(x)) | |
150 | _SIG_SET_OP(signotset, _sig_not) | |
151 | ||
152 | #undef _SIG_SET_OP | |
153 | #undef _sig_not | |
154 | ||
155 | static inline void sigemptyset(sigset_t *set) | |
156 | { | |
157 | switch (_NSIG_WORDS) { | |
158 | default: | |
159 | memset(set, 0, sizeof(sigset_t)); | |
160 | break; | |
161 | case 2: set->sig[1] = 0; | |
162 | case 1: set->sig[0] = 0; | |
163 | break; | |
164 | } | |
165 | } | |
166 | ||
167 | static inline void sigfillset(sigset_t *set) | |
168 | { | |
169 | switch (_NSIG_WORDS) { | |
170 | default: | |
171 | memset(set, -1, sizeof(sigset_t)); | |
172 | break; | |
173 | case 2: set->sig[1] = -1; | |
174 | case 1: set->sig[0] = -1; | |
175 | break; | |
176 | } | |
177 | } | |
178 | ||
179 | /* Some extensions for manipulating the low 32 signals in particular. */ | |
180 | ||
181 | static inline void sigaddsetmask(sigset_t *set, unsigned long mask) | |
182 | { | |
183 | set->sig[0] |= mask; | |
184 | } | |
185 | ||
186 | static inline void sigdelsetmask(sigset_t *set, unsigned long mask) | |
187 | { | |
188 | set->sig[0] &= ~mask; | |
189 | } | |
190 | ||
191 | static inline int sigtestsetmask(sigset_t *set, unsigned long mask) | |
192 | { | |
193 | return (set->sig[0] & mask) != 0; | |
194 | } | |
195 | ||
196 | static inline void siginitset(sigset_t *set, unsigned long mask) | |
197 | { | |
198 | set->sig[0] = mask; | |
199 | switch (_NSIG_WORDS) { | |
200 | default: | |
201 | memset(&set->sig[1], 0, sizeof(long)*(_NSIG_WORDS-1)); | |
202 | break; | |
203 | case 2: set->sig[1] = 0; | |
204 | case 1: ; | |
205 | } | |
206 | } | |
207 | ||
208 | static inline void siginitsetinv(sigset_t *set, unsigned long mask) | |
209 | { | |
210 | set->sig[0] = ~mask; | |
211 | switch (_NSIG_WORDS) { | |
212 | default: | |
213 | memset(&set->sig[1], -1, sizeof(long)*(_NSIG_WORDS-1)); | |
214 | break; | |
215 | case 2: set->sig[1] = -1; | |
216 | case 1: ; | |
217 | } | |
218 | } | |
219 | ||
220 | #endif /* __HAVE_ARCH_SIG_SETOPS */ | |
221 | ||
222 | static inline void init_sigpending(struct sigpending *sig) | |
223 | { | |
224 | sigemptyset(&sig->signal); | |
225 | INIT_LIST_HEAD(&sig->list); | |
226 | } | |
227 | ||
6a14c5c9 ON |
228 | extern void flush_sigqueue(struct sigpending *queue); |
229 | ||
e5bdd883 JJ |
230 | /* Test if 'sig' is valid signal. Use this instead of testing _NSIG directly */ |
231 | static inline int valid_signal(unsigned long sig) | |
232 | { | |
233 | return sig <= _NSIG ? 1 : 0; | |
234 | } | |
235 | ||
1da177e4 LT |
236 | extern int group_send_sig_info(int sig, struct siginfo *info, struct task_struct *p); |
237 | extern int __group_send_sig_info(int, struct siginfo *, struct task_struct *); | |
238 | extern long do_sigpending(void __user *, unsigned long); | |
239 | extern int sigprocmask(int, sigset_t *, sigset_t *); | |
240 | ||
1da177e4 LT |
241 | struct pt_regs; |
242 | extern int get_signal_to_deliver(siginfo_t *info, struct k_sigaction *return_ka, struct pt_regs *regs, void *cookie); | |
1da177e4 LT |
243 | |
244 | #endif /* __KERNEL__ */ | |
245 | ||
246 | #endif /* _LINUX_SIGNAL_H */ |