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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 | ||
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 */ |