1 #ifndef _ASM_X86_SIGNAL_H
2 #define _ASM_X86_SIGNAL_H
5 #include <linux/types.h>
6 #include <linux/time.h>
7 #include <linux/compiler.h>
9 /* Avoid too many header ordering problems. */
13 #include <linux/linkage.h>
15 /* Most things should be clean enough to redefine this at will, if care
16 is taken to make libc match. */
26 #define _NSIG_WORDS (_NSIG / _NSIG_BPW)
28 typedef unsigned long old_sigset_t; /* at least 32 bits */
31 unsigned long sig[_NSIG_WORDS];
35 typedef sigset_t compat_sigset_t;
39 /* Here we must cater to libcs that poke about in kernel headers. */
42 typedef unsigned long sigset_t;
44 #endif /* __KERNEL__ */
45 #endif /* __ASSEMBLY__ */
85 /* These should not be considered constants from userland. */
87 #define SIGRTMAX _NSIG
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.
99 * SA_ONESHOT and SA_NOMASK are the historical Linux names for the Single
100 * Unix names RESETHAND and NODEFER respectively.
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
110 #define SA_NOMASK SA_NODEFER
111 #define SA_ONESHOT SA_RESETHAND
113 #define SA_RESTORER 0x04000000
116 * sigaltstack controls
121 #define MINSIGSTKSZ 2048
122 #define SIGSTKSZ 8192
124 #include <asm-generic/signal-defs.h>
129 extern void do_notify_resume(struct pt_regs *, void *, __u32);
130 # endif /* __KERNEL__ */
134 struct old_sigaction {
135 __sighandler_t sa_handler;
136 old_sigset_t sa_mask;
137 unsigned long sa_flags;
138 __sigrestore_t sa_restorer;
142 __sighandler_t sa_handler;
143 unsigned long sa_flags;
144 __sigrestore_t sa_restorer;
145 sigset_t sa_mask; /* mask last for extensibility */
152 # else /* __KERNEL__ */
153 /* Here we must cater to libcs that poke about in kernel headers. */
157 __sighandler_t _sa_handler;
158 void (*_sa_sigaction)(int, struct siginfo *, void *);
161 unsigned long sa_flags;
162 void (*sa_restorer)(void);
165 #define sa_handler _u._sa_handler
166 #define sa_sigaction _u._sa_sigaction
168 # endif /* ! __KERNEL__ */
172 __sighandler_t sa_handler;
173 unsigned long sa_flags;
174 __sigrestore_t sa_restorer;
175 sigset_t sa_mask; /* mask last for extensibility */
182 #endif /* !__i386__ */
184 typedef struct sigaltstack {
191 #include <asm/sigcontext.h>
195 #define __HAVE_ARCH_SIG_BITOPS
197 #define sigaddset(set,sig) \
198 (__builtin_constant_p(sig) \
199 ? __const_sigaddset((set), (sig)) \
200 : __gen_sigaddset((set), (sig)))
202 static inline void __gen_sigaddset(sigset_t *set, int _sig)
204 asm("btsl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
207 static inline void __const_sigaddset(sigset_t *set, int _sig)
209 unsigned long sig = _sig - 1;
210 set->sig[sig / _NSIG_BPW] |= 1 << (sig % _NSIG_BPW);
213 #define sigdelset(set, sig) \
214 (__builtin_constant_p(sig) \
215 ? __const_sigdelset((set), (sig)) \
216 : __gen_sigdelset((set), (sig)))
219 static inline void __gen_sigdelset(sigset_t *set, int _sig)
221 asm("btrl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
224 static inline void __const_sigdelset(sigset_t *set, int _sig)
226 unsigned long sig = _sig - 1;
227 set->sig[sig / _NSIG_BPW] &= ~(1 << (sig % _NSIG_BPW));
230 static inline int __const_sigismember(sigset_t *set, int _sig)
232 unsigned long sig = _sig - 1;
233 return 1 & (set->sig[sig / _NSIG_BPW] >> (sig % _NSIG_BPW));
236 static inline int __gen_sigismember(sigset_t *set, int _sig)
239 asm("btl %2,%1\n\tsbbl %0,%0"
240 : "=r"(ret) : "m"(*set), "Ir"(_sig-1) : "cc");
244 #define sigismember(set, sig) \
245 (__builtin_constant_p(sig) \
246 ? __const_sigismember((set), (sig)) \
247 : __gen_sigismember((set), (sig)))
249 static inline int sigfindinword(unsigned long word)
251 asm("bsfl %1,%0" : "=r"(word) : "rm"(word) : "cc");
259 #undef __HAVE_ARCH_SIG_BITOPS
261 #endif /* !__i386__ */
263 #endif /* __KERNEL__ */
264 #endif /* __ASSEMBLY__ */
266 #endif /* _ASM_X86_SIGNAL_H */