signal.h
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:5k
- #ifndef _ASMi386_SIGNAL_H
- #define _ASMi386_SIGNAL_H
- #include <linux/types.h>
- /* Avoid too many header ordering problems. */
- struct siginfo;
- #ifdef __KERNEL__
- /* Most things should be clean enough to redefine this at will, if care
- is taken to make libc match. */
- #define _NSIG 64
- #define _NSIG_BPW 32
- #define _NSIG_WORDS (_NSIG / _NSIG_BPW)
- typedef unsigned long old_sigset_t; /* at least 32 bits */
- typedef struct {
- unsigned long sig[_NSIG_WORDS];
- } sigset_t;
- #else
- /* Here we must cater to libcs that poke about in kernel headers. */
- #define NSIG 32
- typedef unsigned long sigset_t;
- #endif /* __KERNEL__ */
- #define SIGHUP 1
- #define SIGINT 2
- #define SIGQUIT 3
- #define SIGILL 4
- #define SIGTRAP 5
- #define SIGABRT 6
- #define SIGIOT 6
- #define SIGBUS 7
- #define SIGFPE 8
- #define SIGKILL 9
- #define SIGUSR1 10
- #define SIGSEGV 11
- #define SIGUSR2 12
- #define SIGPIPE 13
- #define SIGALRM 14
- #define SIGTERM 15
- #define SIGSTKFLT 16
- #define SIGCHLD 17
- #define SIGCONT 18
- #define SIGSTOP 19
- #define SIGTSTP 20
- #define SIGTTIN 21
- #define SIGTTOU 22
- #define SIGURG 23
- #define SIGXCPU 24
- #define SIGXFSZ 25
- #define SIGVTALRM 26
- #define SIGPROF 27
- #define SIGWINCH 28
- #define SIGIO 29
- #define SIGPOLL SIGIO
- /*
- #define SIGLOST 29
- */
- #define SIGPWR 30
- #define SIGSYS 31
- #define SIGUNUSED 31
- /* These should not be considered constants from userland. */
- #define SIGRTMIN 32
- #define SIGRTMAX (_NSIG-1)
- /*
- * SA_FLAGS values:
- *
- * SA_ONSTACK indicates that a registered stack_t will be used.
- * SA_INTERRUPT is a no-op, but left due to historical reasons. Use the
- * SA_RESTART flag to get restarting signals (which were the default long ago)
- * SA_NOCLDSTOP flag to turn off SIGCHLD when children stop.
- * SA_RESETHAND clears the handler when the signal is delivered.
- * SA_NOCLDWAIT flag on SIGCHLD to inhibit zombies.
- * SA_NODEFER prevents the current signal from being masked in the handler.
- *
- * SA_ONESHOT and SA_NOMASK are the historical Linux names for the Single
- * Unix names RESETHAND and NODEFER respectively.
- */
- #define SA_NOCLDSTOP 0x00000001
- #define SA_NOCLDWAIT 0x00000002 /* not supported yet */
- #define SA_SIGINFO 0x00000004
- #define SA_ONSTACK 0x08000000
- #define SA_RESTART 0x10000000
- #define SA_NODEFER 0x40000000
- #define SA_RESETHAND 0x80000000
- #define SA_NOMASK SA_NODEFER
- #define SA_ONESHOT SA_RESETHAND
- #define SA_INTERRUPT 0x20000000 /* dummy -- ignored */
- #define SA_RESTORER 0x04000000
- /*
- * sigaltstack controls
- */
- #define SS_ONSTACK 1
- #define SS_DISABLE 2
- #define MINSIGSTKSZ 2048
- #define SIGSTKSZ 8192
- #ifdef __KERNEL__
- /*
- * These values of sa_flags are used only by the kernel as part of the
- * irq handling routines.
- *
- * SA_INTERRUPT is also used by the irq handling routines.
- * SA_SHIRQ is for shared interrupt support on PCI and EISA.
- */
- #define SA_PROBE SA_ONESHOT
- #define SA_SAMPLE_RANDOM SA_RESTART
- #define SA_SHIRQ 0x04000000
- #endif
- #define SIG_BLOCK 0 /* for blocking signals */
- #define SIG_UNBLOCK 1 /* for unblocking signals */
- #define SIG_SETMASK 2 /* for setting the signal mask */
- /* Type of a signal handler. */
- typedef void (*__sighandler_t)(int);
- #define SIG_DFL ((__sighandler_t)0) /* default signal handling */
- #define SIG_IGN ((__sighandler_t)1) /* ignore signal */
- #define SIG_ERR ((__sighandler_t)-1) /* error return from signal */
- #ifdef __KERNEL__
- struct old_sigaction {
- __sighandler_t sa_handler;
- old_sigset_t sa_mask;
- unsigned long sa_flags;
- void (*sa_restorer)(void);
- };
- struct sigaction {
- __sighandler_t sa_handler;
- unsigned long sa_flags;
- void (*sa_restorer)(void);
- sigset_t sa_mask; /* mask last for extensibility */
- };
- struct k_sigaction {
- struct sigaction sa;
- };
- #else
- /* Here we must cater to libcs that poke about in kernel headers. */
- struct sigaction {
- union {
- __sighandler_t _sa_handler;
- void (*_sa_sigaction)(int, struct siginfo *, void *);
- } _u;
- sigset_t sa_mask;
- unsigned long sa_flags;
- void (*sa_restorer)(void);
- };
- #define sa_handler _u._sa_handler
- #define sa_sigaction _u._sa_sigaction
- #endif /* __KERNEL__ */
- typedef struct sigaltstack {
- void *ss_sp;
- int ss_flags;
- size_t ss_size;
- } stack_t;
- #ifdef __KERNEL__
- #include <asm/sigcontext.h>
- #define __HAVE_ARCH_SIG_BITOPS
- static __inline__ void sigaddset(sigset_t *set, int _sig)
- {
- __asm__("btsl %1,%0" : "=m"(*set) : "Ir"(_sig - 1) : "cc");
- }
- static __inline__ void sigdelset(sigset_t *set, int _sig)
- {
- __asm__("btrl %1,%0" : "=m"(*set) : "Ir"(_sig - 1) : "cc");
- }
- static __inline__ int __const_sigismember(sigset_t *set, int _sig)
- {
- unsigned long sig = _sig - 1;
- return 1 & (set->sig[sig / _NSIG_BPW] >> (sig % _NSIG_BPW));
- }
- static __inline__ int __gen_sigismember(sigset_t *set, int _sig)
- {
- int ret;
- __asm__("btl %2,%1ntsbbl %0,%0"
- : "=r"(ret) : "m"(*set), "Ir"(_sig-1) : "cc");
- return ret;
- }
- #define sigismember(set,sig)
- (__builtin_constant_p(sig) ?
- __const_sigismember((set),(sig)) :
- __gen_sigismember((set),(sig)))
- #define sigmask(sig) (1UL << ((sig) - 1))
- static __inline__ int sigfindinword(unsigned long word)
- {
- __asm__("bsfl %1,%0" : "=r"(word) : "rm"(word) : "cc");
- return word;
- }
- #endif /* __KERNEL__ */
- #endif