1 #ifndef _ASMx86_64_SIGNAL_H
2 #define _ASMx86_64_SIGNAL_H
4 #include <linux/types.h>
6 /* Avoid too many header ordering problems. */
10 /* Most things should be clean enough to redefine this at will, if care
11 is taken to make libc match. */
15 #define _NSIG_WORDS (_NSIG / _NSIG_BPW)
17 typedef unsigned long old_sigset_t; /* at least 32 bits */
20 unsigned long sig[_NSIG_WORDS];
24 /* Here we must cater to libcs that poke about in kernel headers. */
27 typedef unsigned long sigset_t;
29 #endif /* __KERNEL__ */
69 /* These should not be considered constants from userland. */
71 #define SIGRTMAX (_NSIG-1)
76 * SA_ONSTACK indicates that a registered stack_t will be used.
77 * SA_INTERRUPT is a no-op, but left due to historical reasons. Use the
78 * SA_RESTART flag to get restarting signals (which were the default long ago)
79 * SA_NOCLDSTOP flag to turn off SIGCHLD when children stop.
80 * SA_RESETHAND clears the handler when the signal is delivered.
81 * SA_NOCLDWAIT flag on SIGCHLD to inhibit zombies.
82 * SA_NODEFER prevents the current signal from being masked in the handler.
84 * SA_ONESHOT and SA_NOMASK are the historical Linux names for the Single
85 * Unix names RESETHAND and NODEFER respectively.
87 #define SA_NOCLDSTOP 0x00000001
88 #define SA_NOCLDWAIT 0x00000002 /* not supported yet */
89 #define SA_SIGINFO 0x00000004
90 #define SA_ONSTACK 0x08000000
91 #define SA_RESTART 0x10000000
92 #define SA_NODEFER 0x40000000
93 #define SA_RESETHAND 0x80000000
95 #define SA_NOMASK SA_NODEFER
96 #define SA_ONESHOT SA_RESETHAND
97 #define SA_INTERRUPT 0x20000000 /* dummy -- ignored */
99 #define SA_RESTORER 0x04000000
102 * sigaltstack controls
107 #define MINSIGSTKSZ 2048
108 #define SIGSTKSZ 8192
113 * These values of sa_flags are used only by the kernel as part of the
114 * irq handling routines.
116 * SA_INTERRUPT is also used by the irq handling routines.
117 * SA_SHIRQ is for shared interrupt support on PCI and EISA.
119 #define SA_PROBE SA_ONESHOT
120 #define SA_SAMPLE_RANDOM SA_RESTART
121 #define SA_SHIRQ 0x04000000
124 #define SIG_BLOCK 0 /* for blocking signals */
125 #define SIG_UNBLOCK 1 /* for unblocking signals */
126 #define SIG_SETMASK 2 /* for setting the signal mask */
128 /* Type of a signal handler. */
129 typedef void (*__sighandler_t)(int);
131 #define SIG_DFL ((__sighandler_t)0) /* default signal handling */
132 #define SIG_IGN ((__sighandler_t)1) /* ignore signal */
133 #define SIG_ERR ((__sighandler_t)-1) /* error return from signal */
136 __sighandler_t sa_handler;
137 unsigned long sa_flags;
138 void (*sa_restorer)(void);
139 sigset_t sa_mask; /* mask last for extensibility */
146 typedef struct sigaltstack {
153 #include <asm/sigcontext.h>
155 #undef __HAVE_ARCH_SIG_BITOPS
158 extern __inline__ void sigaddset(sigset_t *set, int _sig)
160 __asm__("btsq %1,%0" : "=m"(*set) : "Ir"(_sig - 1) : "cc");
163 extern __inline__ void sigdelset(sigset_t *set, int _sig)
165 __asm__("btrq %1,%0" : "=m"(*set) : "Ir"(_sig - 1) : "cc");
168 extern __inline__ int __const_sigismember(sigset_t *set, int _sig)
170 unsigned long sig = _sig - 1;
171 return 1 & (set->sig[sig / _NSIG_BPW] >> (sig & ~(_NSIG_BPW-1)));
174 extern __inline__ int __gen_sigismember(sigset_t *set, int _sig)
177 __asm__("btq %2,%1\n\tsbbq %0,%0"
178 : "=r"(ret) : "m"(*set), "Ir"(_sig-1) : "cc");
182 #define sigismember(set,sig) \
183 (__builtin_constant_p(sig) ? \
184 __const_sigismember((set),(sig)) : \
185 __gen_sigismember((set),(sig)))
187 #define sigmask(sig) (1UL << ((sig) - 1))
189 extern __inline__ int sigfindinword(unsigned long word)
191 __asm__("bsfq %1,%0" : "=r"(word) : "rm"(word) : "cc");
195 #endif /* __KERNEL__ */