diff options
Diffstat (limited to 'include/linux/signal.h')
-rw-r--r-- | include/linux/signal.h | 224 |
1 files changed, 224 insertions, 0 deletions
diff --git a/include/linux/signal.h b/include/linux/signal.h new file mode 100644 index 000000000000..99c97ad026c8 --- /dev/null +++ b/include/linux/signal.h | |||
@@ -0,0 +1,224 @@ | |||
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 | |||
11 | /* | ||
12 | * Real Time signals may be queued. | ||
13 | */ | ||
14 | |||
15 | struct sigqueue { | ||
16 | struct list_head list; | ||
17 | spinlock_t *lock; | ||
18 | int flags; | ||
19 | siginfo_t info; | ||
20 | struct user_struct *user; | ||
21 | }; | ||
22 | |||
23 | /* flags values. */ | ||
24 | #define SIGQUEUE_PREALLOC 1 | ||
25 | |||
26 | struct sigpending { | ||
27 | struct list_head list; | ||
28 | sigset_t signal; | ||
29 | }; | ||
30 | |||
31 | /* | ||
32 | * Define some primitives to manipulate sigset_t. | ||
33 | */ | ||
34 | |||
35 | #ifndef __HAVE_ARCH_SIG_BITOPS | ||
36 | #include <linux/bitops.h> | ||
37 | |||
38 | /* We don't use <linux/bitops.h> for these because there is no need to | ||
39 | be atomic. */ | ||
40 | static inline void sigaddset(sigset_t *set, int _sig) | ||
41 | { | ||
42 | unsigned long sig = _sig - 1; | ||
43 | if (_NSIG_WORDS == 1) | ||
44 | set->sig[0] |= 1UL << sig; | ||
45 | else | ||
46 | set->sig[sig / _NSIG_BPW] |= 1UL << (sig % _NSIG_BPW); | ||
47 | } | ||
48 | |||
49 | static inline void sigdelset(sigset_t *set, int _sig) | ||
50 | { | ||
51 | unsigned long sig = _sig - 1; | ||
52 | if (_NSIG_WORDS == 1) | ||
53 | set->sig[0] &= ~(1UL << sig); | ||
54 | else | ||
55 | set->sig[sig / _NSIG_BPW] &= ~(1UL << (sig % _NSIG_BPW)); | ||
56 | } | ||
57 | |||
58 | static inline int sigismember(sigset_t *set, int _sig) | ||
59 | { | ||
60 | unsigned long sig = _sig - 1; | ||
61 | if (_NSIG_WORDS == 1) | ||
62 | return 1 & (set->sig[0] >> sig); | ||
63 | else | ||
64 | return 1 & (set->sig[sig / _NSIG_BPW] >> (sig % _NSIG_BPW)); | ||
65 | } | ||
66 | |||
67 | static inline int sigfindinword(unsigned long word) | ||
68 | { | ||
69 | return ffz(~word); | ||
70 | } | ||
71 | |||
72 | #endif /* __HAVE_ARCH_SIG_BITOPS */ | ||
73 | |||
74 | #define sigmask(sig) (1UL << ((sig) - 1)) | ||
75 | |||
76 | #ifndef __HAVE_ARCH_SIG_SETOPS | ||
77 | #include <linux/string.h> | ||
78 | |||
79 | #define _SIG_SET_BINOP(name, op) \ | ||
80 | static inline void name(sigset_t *r, const sigset_t *a, const sigset_t *b) \ | ||
81 | { \ | ||
82 | extern void _NSIG_WORDS_is_unsupported_size(void); \ | ||
83 | unsigned long a0, a1, a2, a3, b0, b1, b2, b3; \ | ||
84 | \ | ||
85 | switch (_NSIG_WORDS) { \ | ||
86 | case 4: \ | ||
87 | a3 = a->sig[3]; a2 = a->sig[2]; \ | ||
88 | b3 = b->sig[3]; b2 = b->sig[2]; \ | ||
89 | r->sig[3] = op(a3, b3); \ | ||
90 | r->sig[2] = op(a2, b2); \ | ||
91 | case 2: \ | ||
92 | a1 = a->sig[1]; b1 = b->sig[1]; \ | ||
93 | r->sig[1] = op(a1, b1); \ | ||
94 | case 1: \ | ||
95 | a0 = a->sig[0]; b0 = b->sig[0]; \ | ||
96 | r->sig[0] = op(a0, b0); \ | ||
97 | break; \ | ||
98 | default: \ | ||
99 | _NSIG_WORDS_is_unsupported_size(); \ | ||
100 | } \ | ||
101 | } | ||
102 | |||
103 | #define _sig_or(x,y) ((x) | (y)) | ||
104 | _SIG_SET_BINOP(sigorsets, _sig_or) | ||
105 | |||
106 | #define _sig_and(x,y) ((x) & (y)) | ||
107 | _SIG_SET_BINOP(sigandsets, _sig_and) | ||
108 | |||
109 | #define _sig_nand(x,y) ((x) & ~(y)) | ||
110 | _SIG_SET_BINOP(signandsets, _sig_nand) | ||
111 | |||
112 | #undef _SIG_SET_BINOP | ||
113 | #undef _sig_or | ||
114 | #undef _sig_and | ||
115 | #undef _sig_nand | ||
116 | |||
117 | #define _SIG_SET_OP(name, op) \ | ||
118 | static inline void name(sigset_t *set) \ | ||
119 | { \ | ||
120 | extern void _NSIG_WORDS_is_unsupported_size(void); \ | ||
121 | \ | ||
122 | switch (_NSIG_WORDS) { \ | ||
123 | case 4: set->sig[3] = op(set->sig[3]); \ | ||
124 | set->sig[2] = op(set->sig[2]); \ | ||
125 | case 2: set->sig[1] = op(set->sig[1]); \ | ||
126 | case 1: set->sig[0] = op(set->sig[0]); \ | ||
127 | break; \ | ||
128 | default: \ | ||
129 | _NSIG_WORDS_is_unsupported_size(); \ | ||
130 | } \ | ||
131 | } | ||
132 | |||
133 | #define _sig_not(x) (~(x)) | ||
134 | _SIG_SET_OP(signotset, _sig_not) | ||
135 | |||
136 | #undef _SIG_SET_OP | ||
137 | #undef _sig_not | ||
138 | |||
139 | static inline void sigemptyset(sigset_t *set) | ||
140 | { | ||
141 | switch (_NSIG_WORDS) { | ||
142 | default: | ||
143 | memset(set, 0, sizeof(sigset_t)); | ||
144 | break; | ||
145 | case 2: set->sig[1] = 0; | ||
146 | case 1: set->sig[0] = 0; | ||
147 | break; | ||
148 | } | ||
149 | } | ||
150 | |||
151 | static inline void sigfillset(sigset_t *set) | ||
152 | { | ||
153 | switch (_NSIG_WORDS) { | ||
154 | default: | ||
155 | memset(set, -1, sizeof(sigset_t)); | ||
156 | break; | ||
157 | case 2: set->sig[1] = -1; | ||
158 | case 1: set->sig[0] = -1; | ||
159 | break; | ||
160 | } | ||
161 | } | ||
162 | |||
163 | /* Some extensions for manipulating the low 32 signals in particular. */ | ||
164 | |||
165 | static inline void sigaddsetmask(sigset_t *set, unsigned long mask) | ||
166 | { | ||
167 | set->sig[0] |= mask; | ||
168 | } | ||
169 | |||
170 | static inline void sigdelsetmask(sigset_t *set, unsigned long mask) | ||
171 | { | ||
172 | set->sig[0] &= ~mask; | ||
173 | } | ||
174 | |||
175 | static inline int sigtestsetmask(sigset_t *set, unsigned long mask) | ||
176 | { | ||
177 | return (set->sig[0] & mask) != 0; | ||
178 | } | ||
179 | |||
180 | static inline void siginitset(sigset_t *set, unsigned long mask) | ||
181 | { | ||
182 | set->sig[0] = mask; | ||
183 | switch (_NSIG_WORDS) { | ||
184 | default: | ||
185 | memset(&set->sig[1], 0, sizeof(long)*(_NSIG_WORDS-1)); | ||
186 | break; | ||
187 | case 2: set->sig[1] = 0; | ||
188 | case 1: ; | ||
189 | } | ||
190 | } | ||
191 | |||
192 | static inline void siginitsetinv(sigset_t *set, unsigned long mask) | ||
193 | { | ||
194 | set->sig[0] = ~mask; | ||
195 | switch (_NSIG_WORDS) { | ||
196 | default: | ||
197 | memset(&set->sig[1], -1, sizeof(long)*(_NSIG_WORDS-1)); | ||
198 | break; | ||
199 | case 2: set->sig[1] = -1; | ||
200 | case 1: ; | ||
201 | } | ||
202 | } | ||
203 | |||
204 | #endif /* __HAVE_ARCH_SIG_SETOPS */ | ||
205 | |||
206 | static inline void init_sigpending(struct sigpending *sig) | ||
207 | { | ||
208 | sigemptyset(&sig->signal); | ||
209 | INIT_LIST_HEAD(&sig->list); | ||
210 | } | ||
211 | |||
212 | extern int group_send_sig_info(int sig, struct siginfo *info, struct task_struct *p); | ||
213 | extern int __group_send_sig_info(int, struct siginfo *, struct task_struct *); | ||
214 | extern long do_sigpending(void __user *, unsigned long); | ||
215 | extern int sigprocmask(int, sigset_t *, sigset_t *); | ||
216 | |||
217 | #ifndef HAVE_ARCH_GET_SIGNAL_TO_DELIVER | ||
218 | struct pt_regs; | ||
219 | extern int get_signal_to_deliver(siginfo_t *info, struct k_sigaction *return_ka, struct pt_regs *regs, void *cookie); | ||
220 | #endif | ||
221 | |||
222 | #endif /* __KERNEL__ */ | ||
223 | |||
224 | #endif /* _LINUX_SIGNAL_H */ | ||