FreeBSD/Linux Kernel Cross Reference
sys/include/asm-alpha/signal.h

     #ifndef _ASMAXP_SIGNAL_H
     #define _ASMAXP_SIGNAL_H
     
     #include <linux/types.h>
     
     /* Avoid too many header ordering problems.  */
     struct siginfo;
     
     #ifdef __KERNEL__
    /* Digital Unix defines 64 signals.  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       64
    #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__ */
    
    
    /*
     * Linux/AXP has different signal numbers that Linux/i386: I'm trying
     * to make it OSF/1 binary compatible, at least for normal binaries.
     */
    #define SIGHUP           1
    #define SIGINT           2
    #define SIGQUIT          3
    #define SIGILL           4
    #define SIGTRAP          5
    #define SIGABRT          6
    #define SIGEMT           7
    #define SIGFPE           8
    #define SIGKILL          9
    #define SIGBUS          10
    #define SIGSEGV         11
    #define SIGSYS          12
    #define SIGPIPE         13
    #define SIGALRM         14
    #define SIGTERM         15
    #define SIGURG          16
    #define SIGSTOP         17
    #define SIGTSTP         18
    #define SIGCONT         19
    #define SIGCHLD         20
    #define SIGTTIN         21
    #define SIGTTOU         22
    #define SIGIO           23
    #define SIGXCPU         24
    #define SIGXFSZ         25
    #define SIGVTALRM       26
    #define SIGPROF         27
    #define SIGWINCH        28
    #define SIGINFO         29
    #define SIGUSR1         30
    #define SIGUSR2         31
    
    #define SIGPOLL SIGIO
    #define SIGPWR  SIGINFO
    #define SIGIOT  SIGABRT
    
    /* 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_ONSTACK      0x00000001
    #define SA_RESTART      0x00000002
    #define SA_NOCLDSTOP    0x00000004
    #define SA_NODEFER      0x00000008
    #define SA_RESETHAND    0x00000010
    #define SA_NOCLDWAIT    0x00000020 /* not supported yet */
    #define SA_SIGINFO      0x00000040
    
    #define SA_ONESHOT      SA_RESETHAND
   #define SA_NOMASK       SA_NODEFER
   #define SA_INTERRUPT    0x20000000 /* dummy -- ignored */
   
   /* 
    * sigaltstack controls
    */
   #define SS_ONSTACK      1
   #define SS_DISABLE      2
   
   #define MINSIGSTKSZ     4096
   #define SIGSTKSZ        16384
   
   
   #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                0x40000000
   #endif
   
   #define SIG_BLOCK          1    /* for blocking signals */
   #define SIG_UNBLOCK        2    /* for unblocking signals */
   #define SIG_SETMASK        3    /* 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 osf_sigaction {
           __sighandler_t  sa_handler;
           old_sigset_t    sa_mask;
           int             sa_flags;
   };
   
   struct sigaction {
           __sighandler_t  sa_handler;
           unsigned long   sa_flags;
           sigset_t        sa_mask;        /* mask last for extensibility */
   };
   
   struct k_sigaction {
           struct sigaction sa;
           void (*ka_restorer)(void);
   };
   #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;
           int             sa_flags;
   };
   
   #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;
   
   /* sigstack(2) is deprecated, and will be withdrawn in a future version
      of the X/Open CAE Specification.  Use sigaltstack instead.  It is only
      implemented here for OSF/1 compatibility.  */
   
   struct sigstack {
           void *ss_sp;
           int ss_onstack;
   };
   
   #ifdef __KERNEL__
   #include <asm/sigcontext.h>
   #endif
   
   #endif

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