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/*

 * 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, 1996, 1997, 1998, 1999 by Ralf Baechle

 * Copyright (C) 1999 Silicon Graphics, Inc.

 */

#ifndef _ASM_SIGNAL_H

#define _ASM_SIGNAL_H

#include <linux/config.h>

#include <linux/types.h>

#define _NSIG           128

#define _NSIG_BPW       32

#define _NSIG_WORDS     (_NSIG / _NSIG_BPW)

typedef struct {

        unsigned long sig[_NSIG_WORDS];

} sigset_t;

typedef unsigned long old_sigset_t;             /* at least 32 bits */

#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

/*

 * 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;

#ifdef CONFIG_BINFMT_IRIX

        void            (*sa_restorer)(void);

#endif

};

/* 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__) */

#endif /* _ASM_SIGNAL_H */