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 /* Here we must cater to libcs that poke about in kernel headers. */
38 typedef unsigned long sigset_t;
40 #endif /* __KERNEL__ */
41 #endif /* __ASSEMBLY__ */
81 /* These should not be considered constants from userland. */
83 #define SIGRTMAX _NSIG
88 * SA_ONSTACK indicates that a registered stack_t will be used.
89 * SA_RESTART flag to get restarting signals (which were the default long ago)
90 * SA_NOCLDSTOP flag to turn off SIGCHLD when children stop.
91 * SA_RESETHAND clears the handler when the signal is delivered.
92 * SA_NOCLDWAIT flag on SIGCHLD to inhibit zombies.
93 * SA_NODEFER prevents the current signal from being masked in the handler.
95 * SA_ONESHOT and SA_NOMASK are the historical Linux names for the Single
96 * Unix names RESETHAND and NODEFER respectively.
98 #define SA_NOCLDSTOP 0x00000001u
99 #define SA_NOCLDWAIT 0x00000002u
100 #define SA_SIGINFO 0x00000004u
101 #define SA_ONSTACK 0x08000000u
102 #define SA_RESTART 0x10000000u
103 #define SA_NODEFER 0x40000000u
104 #define SA_RESETHAND 0x80000000u
106 #define SA_NOMASK SA_NODEFER
107 #define SA_ONESHOT SA_RESETHAND
109 #define SA_RESTORER 0x04000000
112 * sigaltstack controls
117 #define MINSIGSTKSZ 2048
118 #define SIGSTKSZ 8192
120 #include <asm-generic/signal-defs.h>
125 extern void do_notify_resume(struct pt_regs *, void *, __u32);
126 # endif /* __KERNEL__ */
128 #define __ARCH_HAS_SA_RESTORER
132 struct old_sigaction {
133 __sighandler_t sa_handler;
134 old_sigset_t sa_mask;
135 unsigned long sa_flags;
136 __sigrestore_t sa_restorer;
140 __sighandler_t sa_handler;
141 unsigned long sa_flags;
142 __sigrestore_t sa_restorer;
143 sigset_t sa_mask; /* mask last for extensibility */
150 # else /* __KERNEL__ */
151 /* Here we must cater to libcs that poke about in kernel headers. */
155 __sighandler_t _sa_handler;
156 void (*_sa_sigaction)(int, struct siginfo *, void *);
159 unsigned long sa_flags;
160 void (*sa_restorer)(void);
163 #define sa_handler _u._sa_handler
164 #define sa_sigaction _u._sa_sigaction
166 # endif /* ! __KERNEL__ */
170 __sighandler_t sa_handler;
171 unsigned long sa_flags;
172 __sigrestore_t sa_restorer;
173 sigset_t sa_mask; /* mask last for extensibility */
180 #endif /* !__i386__ */
182 typedef struct sigaltstack {
189 #include <asm/sigcontext.h>
193 #define __HAVE_ARCH_SIG_BITOPS
195 #define sigaddset(set,sig) \
196 (__builtin_constant_p(sig) \
197 ? __const_sigaddset((set), (sig)) \
198 : __gen_sigaddset((set), (sig)))
200 static inline void __gen_sigaddset(sigset_t *set, int _sig)
202 asm("btsl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
205 static inline void __const_sigaddset(sigset_t *set, int _sig)
207 unsigned long sig = _sig - 1;
208 set->sig[sig / _NSIG_BPW] |= 1 << (sig % _NSIG_BPW);
211 #define sigdelset(set, sig) \
212 (__builtin_constant_p(sig) \
213 ? __const_sigdelset((set), (sig)) \
214 : __gen_sigdelset((set), (sig)))
217 static inline void __gen_sigdelset(sigset_t *set, int _sig)
219 asm("btrl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
222 static inline void __const_sigdelset(sigset_t *set, int _sig)
224 unsigned long sig = _sig - 1;
225 set->sig[sig / _NSIG_BPW] &= ~(1 << (sig % _NSIG_BPW));
228 static inline int __const_sigismember(sigset_t *set, int _sig)
230 unsigned long sig = _sig - 1;
231 return 1 & (set->sig[sig / _NSIG_BPW] >> (sig % _NSIG_BPW));
234 static inline int __gen_sigismember(sigset_t *set, int _sig)
237 asm("btl %2,%1\n\tsbbl %0,%0"
238 : "=r"(ret) : "m"(*set), "Ir"(_sig-1) : "cc");
242 #define sigismember(set, sig) \
243 (__builtin_constant_p(sig) \
244 ? __const_sigismember((set), (sig)) \
245 : __gen_sigismember((set), (sig)))
247 static inline int sigfindinword(unsigned long word)
249 asm("bsfl %1,%0" : "=r"(word) : "rm"(word) : "cc");
257 #undef __HAVE_ARCH_SIG_BITOPS
259 #endif /* !__i386__ */
261 #define ptrace_signal_deliver(regs, cookie) do { } while (0)
263 #endif /* __KERNEL__ */
264 #endif /* __ASSEMBLY__ */
266 #endif /* _ASM_X86_SIGNAL_H */