Linux Kernel  3.7.1
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signal.h
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1 #ifndef _ASM_X86_SIGNAL_H
2 #define _ASM_X86_SIGNAL_H
3 
4 #ifndef __ASSEMBLY__
5 #include <linux/types.h>
6 #include <linux/time.h>
7 #include <linux/compiler.h>
8 
9 /* Avoid too many header ordering problems. */
10 struct siginfo;
11 
12 #ifdef __KERNEL__
13 #include <linux/linkage.h>
14 
15 /* Most things should be clean enough to redefine this at will, if care
16  is taken to make libc match. */
17 
18 #define _NSIG 64
19 
20 #ifdef __i386__
21 # define _NSIG_BPW 32
22 #else
23 # define _NSIG_BPW 64
24 #endif
25 
26 #define _NSIG_WORDS (_NSIG / _NSIG_BPW)
27 
28 typedef unsigned long old_sigset_t; /* at least 32 bits */
29 
30 typedef struct {
31  unsigned long sig[_NSIG_WORDS];
32 } sigset_t;
33 
34 #ifndef CONFIG_COMPAT
35 typedef sigset_t compat_sigset_t;
36 #endif
37 
38 #else
39 /* Here we must cater to libcs that poke about in kernel headers. */
40 
41 #define NSIG 32
42 typedef unsigned long sigset_t;
43 
44 #endif /* __KERNEL__ */
45 #endif /* __ASSEMBLY__ */
46 
47 #define SIGHUP 1
48 #define SIGINT 2
49 #define SIGQUIT 3
50 #define SIGILL 4
51 #define SIGTRAP 5
52 #define SIGABRT 6
53 #define SIGIOT 6
54 #define SIGBUS 7
55 #define SIGFPE 8
56 #define SIGKILL 9
57 #define SIGUSR1 10
58 #define SIGSEGV 11
59 #define SIGUSR2 12
60 #define SIGPIPE 13
61 #define SIGALRM 14
62 #define SIGTERM 15
63 #define SIGSTKFLT 16
64 #define SIGCHLD 17
65 #define SIGCONT 18
66 #define SIGSTOP 19
67 #define SIGTSTP 20
68 #define SIGTTIN 21
69 #define SIGTTOU 22
70 #define SIGURG 23
71 #define SIGXCPU 24
72 #define SIGXFSZ 25
73 #define SIGVTALRM 26
74 #define SIGPROF 27
75 #define SIGWINCH 28
76 #define SIGIO 29
77 #define SIGPOLL SIGIO
78 /*
79 #define SIGLOST 29
80 */
81 #define SIGPWR 30
82 #define SIGSYS 31
83 #define SIGUNUSED 31
84 
85 /* These should not be considered constants from userland. */
86 #define SIGRTMIN 32
87 #define SIGRTMAX _NSIG
88 
89 /*
90  * SA_FLAGS values:
91  *
92  * SA_ONSTACK indicates that a registered stack_t will be used.
93  * SA_RESTART flag to get restarting signals (which were the default long ago)
94  * SA_NOCLDSTOP flag to turn off SIGCHLD when children stop.
95  * SA_RESETHAND clears the handler when the signal is delivered.
96  * SA_NOCLDWAIT flag on SIGCHLD to inhibit zombies.
97  * SA_NODEFER prevents the current signal from being masked in the handler.
98  *
99  * SA_ONESHOT and SA_NOMASK are the historical Linux names for the Single
100  * Unix names RESETHAND and NODEFER respectively.
101  */
102 #define SA_NOCLDSTOP 0x00000001u
103 #define SA_NOCLDWAIT 0x00000002u
104 #define SA_SIGINFO 0x00000004u
105 #define SA_ONSTACK 0x08000000u
106 #define SA_RESTART 0x10000000u
107 #define SA_NODEFER 0x40000000u
108 #define SA_RESETHAND 0x80000000u
109 
110 #define SA_NOMASK SA_NODEFER
111 #define SA_ONESHOT SA_RESETHAND
112 
113 #define SA_RESTORER 0x04000000
114 
115 /*
116  * sigaltstack controls
117  */
118 #define SS_ONSTACK 1
119 #define SS_DISABLE 2
120 
121 #define MINSIGSTKSZ 2048
122 #define SIGSTKSZ 8192
123 
124 #include <asm-generic/signal-defs.h>
125 
126 #ifndef __ASSEMBLY__
127 
128 # ifdef __KERNEL__
129 extern void do_notify_resume(struct pt_regs *, void *, __u32);
130 # endif /* __KERNEL__ */
131 
132 #ifdef __i386__
133 # ifdef __KERNEL__
134 struct old_sigaction {
137  unsigned long sa_flags;
139 };
140 
141 struct sigaction {
143  unsigned long sa_flags;
145  sigset_t sa_mask; /* mask last for extensibility */
146 };
147 
148 struct k_sigaction {
149  struct sigaction sa;
150 };
151 
152 # else /* __KERNEL__ */
153 /* Here we must cater to libcs that poke about in kernel headers. */
154 
155 struct sigaction {
156  union {
158  void (*_sa_sigaction)(int, struct siginfo *, void *);
159  } _u;
161  unsigned long sa_flags;
162  void (*sa_restorer)(void);
163 };
164 
165 #define sa_handler _u._sa_handler
166 #define sa_sigaction _u._sa_sigaction
167 
168 # endif /* ! __KERNEL__ */
169 #else /* __i386__ */
170 
171 struct sigaction {
173  unsigned long sa_flags;
175  sigset_t sa_mask; /* mask last for extensibility */
176 };
177 
178 struct k_sigaction {
179  struct sigaction sa;
180 };
181 
182 #endif /* !__i386__ */
183 
184 typedef struct sigaltstack {
185  void __user *ss_sp;
186  int ss_flags;
187  size_t ss_size;
188 } stack_t;
189 
190 #ifdef __KERNEL__
191 #include <asm/sigcontext.h>
192 
193 #ifdef __i386__
194 
195 #define __HAVE_ARCH_SIG_BITOPS
196 
197 #define sigaddset(set,sig) \
198  (__builtin_constant_p(sig) \
199  ? __const_sigaddset((set), (sig)) \
200  : __gen_sigaddset((set), (sig)))
201 
202 static inline void __gen_sigaddset(sigset_t *set, int _sig)
203 {
204  asm("btsl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
205 }
206 
207 static inline void __const_sigaddset(sigset_t *set, int _sig)
208 {
209  unsigned long sig = _sig - 1;
210  set->sig[sig / _NSIG_BPW] |= 1 << (sig % _NSIG_BPW);
211 }
212 
213 #define sigdelset(set, sig) \
214  (__builtin_constant_p(sig) \
215  ? __const_sigdelset((set), (sig)) \
216  : __gen_sigdelset((set), (sig)))
217 
218 
219 static inline void __gen_sigdelset(sigset_t *set, int _sig)
220 {
221  asm("btrl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
222 }
223 
224 static inline void __const_sigdelset(sigset_t *set, int _sig)
225 {
226  unsigned long sig = _sig - 1;
227  set->sig[sig / _NSIG_BPW] &= ~(1 << (sig % _NSIG_BPW));
228 }
229 
230 static inline int __const_sigismember(sigset_t *set, int _sig)
231 {
232  unsigned long sig = _sig - 1;
233  return 1 & (set->sig[sig / _NSIG_BPW] >> (sig % _NSIG_BPW));
234 }
235 
236 static inline int __gen_sigismember(sigset_t *set, int _sig)
237 {
238  int ret;
239  asm("btl %2,%1\n\tsbbl %0,%0"
240  : "=r"(ret) : "m"(*set), "Ir"(_sig-1) : "cc");
241  return ret;
242 }
243 
244 #define sigismember(set, sig) \
245  (__builtin_constant_p(sig) \
246  ? __const_sigismember((set), (sig)) \
247  : __gen_sigismember((set), (sig)))
248 
249 static inline int sigfindinword(unsigned long word)
250 {
251  asm("bsfl %1,%0" : "=r"(word) : "rm"(word) : "cc");
252  return word;
253 }
254 
255 struct pt_regs;
256 
257 #else /* __i386__ */
258 
259 #undef __HAVE_ARCH_SIG_BITOPS
260 
261 #endif /* !__i386__ */
262 
263 #define ptrace_signal_deliver(regs, cookie) do { } while (0)
264 
265 #endif /* __KERNEL__ */
266 #endif /* __ASSEMBLY__ */
267 
268 #endif /* _ASM_X86_SIGNAL_H */