FreeBSD/Linux Kernel Cross Reference
sys/include/asm-mips64/signal.h

     /*
      * This file is subject to the terms and conditions of the GNU General Public
      * License.  See the file "COPYING" in the main directory of this archive
      * for more details.
      *
      * Copyright (C) 1995 - 1999 by Ralf Baechle
      * Copyright (C) 1999 Silicon Graphics, Inc.
      */
     #ifndef _ASM_SIGNAL_H
    #define _ASM_SIGNAL_H
    
    #include <linux/types.h>
    
    #define _NSIG           128
    #define _NSIG_BPW       64
    #define _NSIG_WORDS     (_NSIG / _NSIG_BPW)
    
    typedef struct {
            unsigned long sig[_NSIG_WORDS];
    } sigset_t;
    
    #define _NSIG32         128
    #define _NSIG_BPW32     32
    #define _NSIG_WORDS32   (_NSIG32 / _NSIG_BPW32)
    
    typedef struct {
            unsigned int sig[_NSIG_WORDS32];
    } sigset_t32;
    
    typedef unsigned long old_sigset_t;             /* at least 32 bits */
    typedef unsigned int old_sigset_t32;
    
    #define SIGHUP           1      /* Hangup (POSIX).  */
    #define SIGINT           2      /* Interrupt (ANSI).  */
    #define SIGQUIT          3      /* Quit (POSIX).  */
    #define SIGILL           4      /* Illegal instruction (ANSI).  */
    #define SIGTRAP          5      /* Trace trap (POSIX).  */
    #define SIGIOT           6      /* IOT trap (4.2 BSD).  */
    #define SIGABRT          SIGIOT /* Abort (ANSI).  */
    #define SIGEMT           7
    #define SIGFPE           8      /* Floating-point exception (ANSI).  */
    #define SIGKILL          9      /* Kill, unblockable (POSIX).  */
    #define SIGBUS          10      /* BUS error (4.2 BSD).  */
    #define SIGSEGV         11      /* Segmentation violation (ANSI).  */
    #define SIGSYS          12
    #define SIGPIPE         13      /* Broken pipe (POSIX).  */
    #define SIGALRM         14      /* Alarm clock (POSIX).  */
    #define SIGTERM         15      /* Termination (ANSI).  */
    #define SIGUSR1         16      /* User-defined signal 1 (POSIX).  */
    #define SIGUSR2         17      /* User-defined signal 2 (POSIX).  */
    #define SIGCHLD         18      /* Child status has changed (POSIX).  */
    #define SIGCLD          SIGCHLD /* Same as SIGCHLD (System V).  */
    #define SIGPWR          19      /* Power failure restart (System V).  */
    #define SIGWINCH        20      /* Window size change (4.3 BSD, Sun).  */
    #define SIGURG          21      /* Urgent condition on socket (4.2 BSD).  */
    #define SIGIO           22      /* I/O now possible (4.2 BSD).  */
    #define SIGPOLL         SIGIO   /* Pollable event occurred (System V).  */
    #define SIGSTOP         23      /* Stop, unblockable (POSIX).  */
    #define SIGTSTP         24      /* Keyboard stop (POSIX).  */
    #define SIGCONT         25      /* Continue (POSIX).  */
    #define SIGTTIN         26      /* Background read from tty (POSIX).  */
    #define SIGTTOU         27      /* Background write to tty (POSIX).  */
    #define SIGVTALRM       28      /* Virtual alarm clock (4.2 BSD).  */
    #define SIGPROF         29      /* Profiling alarm clock (4.2 BSD).  */
    #define SIGXCPU         30      /* CPU limit exceeded (4.2 BSD).  */
    #define SIGXFSZ         31      /* File size limit exceeded (4.2 BSD).  */
    
    /* 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      0x08000000
    #define SA_RESETHAND    0x80000000
    #define SA_RESTART      0x10000000
    #define SA_SIGINFO      0x00000008
    #define SA_NODEFER      0x40000000
    #define SA_NOCLDWAIT    0x00010000      /* Not supported yet */
    #define SA_NOCLDSTOP    0x00000001
    
    #define SA_NOMASK       SA_NODEFER
    #define SA_ONESHOT      SA_RESETHAND
    #define SA_INTERRUPT    0x20000000      /* dummy -- ignored */
    
    #define SA_RESTORER     0x04000000      /* Only for o32 compat code */
    
   /*
    * 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 flag is for shared interrupt support on PCI and EISA.
    */
   #define SA_PROBE                SA_ONESHOT
   #define SA_SAMPLE_RANDOM        SA_RESTART
   #define SA_SHIRQ                0x02000000
   
   #endif /* __KERNEL__ */
   
   #define SIG_BLOCK       1       /* for blocking signals */
   #define SIG_UNBLOCK     2       /* for unblocking signals */
   #define SIG_SETMASK     3       /* for setting the signal mask */
   #define SIG_SETMASK32   256     /* Goodie from SGI for BSD compatibility:
                                      set only the low 32 bit of the sigset.  */
   
   /* Type of a signal handler.  */
   typedef void (*__sighandler_t)(int);
   
   /* Fake signal functions */
   #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 */
   
   struct sigaction {
           unsigned int    sa_flags;
           __sighandler_t  sa_handler;
           sigset_t        sa_mask;
   };
   
   struct k_sigaction {
           struct sigaction sa;
   };
   
   /* IRIX compatible stack_t  */
   typedef struct sigaltstack {
           void *ss_sp;
           size_t ss_size;
           int ss_flags;
   } stack_t;
   
   #ifdef __KERNEL__
   #include <asm/sigcontext.h>
   
   /*
    * The following break codes are or were in use for specific purposes in
    * other MIPS operating systems.  Linux/MIPS doesn't use all of them.  The
    * unused ones are here as placeholders; we might encounter them in
    * non-Linux/MIPS object files or make use of them in the future.
    */
   #define BRK_USERBP      0       /* User bp (used by debuggers) */
   #define BRK_KERNELBP    1       /* Break in the kernel */
   #define BRK_ABORT       2       /* Sometimes used by abort(3) to SIGIOT */
   #define BRK_BD_TAKEN    3       /* For bd slot emulation - not implemented */
   #define BRK_BD_NOTTAKEN 4       /* For bd slot emulation - not implemented */
   #define BRK_SSTEPBP     5       /* User bp (used by debuggers) */
   #define BRK_OVERFLOW    6       /* Overflow check */
   #define BRK_DIVZERO     7       /* Divide by zero check */
   #define BRK_RANGE       8       /* Range error check */
   #define BRK_STACKOVERFLOW 9     /* For Ada stackchecking */
   #define BRK_NORLD       10      /* No rld found - not used by Linux/MIPS */
   #define _BRK_THREADBP   11      /* For threads, user bp (used by debuggers) */
   #define BRK_MULOVF      1023    /* Multiply overflow */
   #endif /* defined (__KERNEL__) || defined (__USE_MISC) */
   
   #endif /* !defined (_ASM_SIGNAL_H) */

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