include/asm-mips/signal.h

   1 /* $Id: signal.h,v 1.4 1998/08/18 20:46:42 ralf Exp $
   2  *
   3  * This file is subject to the terms and conditions of the GNU General Public
   4  * License.  See the file "COPYING" in the main directory of this archive
   5  * for more details.
   6  *
   7  * Copyright (C) 1995, 1996, 1997, 1998 by Ralf Baechle
   8  */
   9 #ifndef __ASM_MIPS_SIGNAL_H
  10 #define __ASM_MIPS_SIGNAL_H
  11
  12 #include <linux/types.h>
  13
  14 #define _NSIG           128
  15 #define _NSIG_BPW       32
  16 #define _NSIG_WORDS     (_NSIG / _NSIG_BPW)
  17
  18 typedef struct {
  19         unsigned long sig[_NSIG_WORDS];
  20 } sigset_t;
  21
  22 typedef unsigned long old_sigset_t;             /* at least 32 bits */
  23
  24 #define SIGHUP           1      /* Hangup (POSIX).  */
  25 #define SIGINT           2      /* Interrupt (ANSI).  */
  26 #define SIGQUIT          3      /* Quit (POSIX).  */
  27 #define SIGILL           4      /* Illegal instruction (ANSI).  */
  28 #define SIGTRAP          5      /* Trace trap (POSIX).  */
  29 #define SIGIOT           6      /* IOT trap (4.2 BSD).  */
  30 #define SIGABRT          SIGIOT /* Abort (ANSI).  */
  31 #define SIGEMT           7
  32 #define SIGFPE           8      /* Floating-point exception (ANSI).  */
  33 #define SIGKILL          9      /* Kill, unblockable (POSIX).  */
  34 #define SIGBUS          10      /* BUS error (4.2 BSD).  */
  35 #define SIGSEGV         11      /* Segmentation violation (ANSI).  */
  36 #define SIGSYS          12
  37 #define SIGPIPE         13      /* Broken pipe (POSIX).  */
  38 #define SIGALRM         14      /* Alarm clock (POSIX).  */
  39 #define SIGTERM         15      /* Termination (ANSI).  */
  40 #define SIGUSR1         16      /* User-defined signal 1 (POSIX).  */
  41 #define SIGUSR2         17      /* User-defined signal 2 (POSIX).  */
  42 #define SIGCHLD         18      /* Child status has changed (POSIX).  */
  43 #define SIGCLD          SIGCHLD /* Same as SIGCHLD (System V).  */
  44 #define SIGPWR          19      /* Power failure restart (System V).  */
  45 #define SIGWINCH        20      /* Window size change (4.3 BSD, Sun).  */
  46 #define SIGURG          21      /* Urgent condition on socket (4.2 BSD).  */
  47 #define SIGIO           22      /* I/O now possible (4.2 BSD).  */
  48 #define SIGPOLL         SIGIO   /* Pollable event occurred (System V).  */
  49 #define SIGSTOP         23      /* Stop, unblockable (POSIX).  */
  50 #define SIGTSTP         24      /* Keyboard stop (POSIX).  */
  51 #define SIGCONT         25      /* Continue (POSIX).  */
  52 #define SIGTTIN         26      /* Background read from tty (POSIX).  */
  53 #define SIGTTOU         27      /* Background write to tty (POSIX).  */
  54 #define SIGVTALRM       28      /* Virtual alarm clock (4.2 BSD).  */
  55 #define SIGPROF         29      /* Profiling alarm clock (4.2 BSD).  */
  56 #define SIGXCPU         30      /* CPU limit exceeded (4.2 BSD).  */
  57 #define SIGXFSZ         31      /* File size limit exceeded (4.2 BSD).  */
  58
  59 /* These should not be considered constants from userland.  */
  60 #define SIGRTMIN        32
  61 #define SIGRTMAX        (_NSIG-1)
  62
  63 /*
  64  * SA_FLAGS values:
  65  *
  66  * SA_ONSTACK indicates that a registered stack_t will be used.
  67  * SA_INTERRUPT is a no-op, but left due to historical reasons. Use the
  68  * SA_RESTART flag to get restarting signals (which were the default long ago)
  69  * SA_NOCLDSTOP flag to turn off SIGCHLD when children stop.
  70  * SA_RESETHAND clears the handler when the signal is delivered.
  71  * SA_NOCLDWAIT flag on SIGCHLD to inhibit zombies.
  72  * SA_NODEFER prevents the current signal from being masked in the handler.
  73  *
  74  * SA_ONESHOT and SA_NOMASK are the historical Linux names for the Single
  75  * Unix names RESETHAND and NODEFER respectively.
  76  */
  77 #define SA_STACK        0x00000001
  78 #define SA_RESETHAND    0x00000002
  79 #define SA_RESTART      0x00000004
  80 #define SA_SIGINFO      0x00000008
  81 #define SA_NODEFER      0x00000010
  82 #define SA_NOCLDWAIT    0x00010000      /* Not supported yet */
  83 #define SA_NOCLDSTOP    0x00020000
  84
  85 #define SA_NOMASK       SA_NODEFER
  86 #define SA_ONESHOT      SA_RESETHAND
  87
  88 /*
  89  * sigaltstack controls
  90  */
  91 #define SS_ONSTACK     1
  92 #define SS_DISABLE     2
  93
  94 #define MINSIGSTKSZ    2048
  95 #define SIGSTKSZ       8192
  96
  97 #ifdef __KERNEL__
  98 /*
  99  * These values of sa_flags are used only by the kernel as part of the
 100  * irq handling routines.
 101  *
 102  * SA_INTERRUPT is a no-op, but left due to historical reasons. Use the
 103  * SA_RESTART flag to get restarting signals (which were the default long ago)
 104  * SA_SHIRQ flag is for shared interrupt support on PCI and EISA.
 105  */
 106 #define SA_INTERRUPT            0x01000000      /* interrupt handling */
 107 #define SA_SHIRQ                0x08000000
 108 #define SA_PROBE                SA_ONESHOT
 109 #define SA_SAMPLE_RANDOM        SA_RESTART
 110 #endif /* __KERNEL__ */
 111
 112 #define SIG_BLOCK       1       /* for blocking signals */
 113 #define SIG_UNBLOCK     2       /* for unblocking signals */
 114 #define SIG_SETMASK     3       /* for setting the signal mask */
 115 #define SIG_SETMASK32   256     /* Goodie from SGI for BSD compatibility:
 116                                    set only the low 32 bit of the sigset.  */
 117
 118 /* Type of a signal handler.  */
 119 typedef void (*__sighandler_t)(int);
 120
 121 /* Fake signal functions */
 122 #define SIG_DFL ((__sighandler_t)0)     /* default signal handling */
 123 #define SIG_IGN ((__sighandler_t)1)     /* ignore signal */
 124 #define SIG_ERR ((__sighandler_t)-1)    /* error return from signal */
 125
 126 struct sigaction {
 127         unsigned int    sa_flags;
 128         __sighandler_t  sa_handler;
 129         sigset_t        sa_mask;
 130         int             sa_resv[2];     /* reserved */
 131 };
 132
 133 /* XXX use sa_rev for storing ka_restorer */
 134 struct k_sigaction {
 135         struct sigaction sa;
 136         void (*ka_restorer)(void);
 137 };
 138
 139 /* IRIX compatible stack_t  */
 140 typedef struct sigaltstack {
 141         void *ss_sp;
 142         size_t ss_size;
 143         int ss_flags;
 144 } stack_t;
 145
 146 #ifdef __KERNEL__
 147 #include <asm/sigcontext.h>
 148 #endif
 149
 150 #if defined (__KERNEL__) || defined (__USE_MISC)
 151 /*
 152  * The following break codes are or were in use for specific purposes in
 153  * other MIPS operating systems.  Linux/MIPS doesn't use all of them.  The
 154  * unused ones are here as placeholders; we might encounter them in
 155  * non-Linux/MIPS object files or make use of them in the future.
 156  */
 157 #define BRK_USERBP      0       /* User bp (used by debuggers) */
 158 #define BRK_KERNELBP    1       /* Break in the kernel */
 159 #define BRK_ABORT       2       /* Sometimes used by abort(3) to SIGIOT */
 160 #define BRK_BD_TAKEN    3       /* For bd slot emulation - not implemented */
 161 #define BRK_BD_NOTTAKEN 4       /* For bd slot emulation - not implemented */
 162 #define BRK_SSTEPBP     5       /* User bp (used by debuggers) */
 163 #define BRK_OVERFLOW    6       /* Overflow check */
 164 #define BRK_DIVZERO     7       /* Divide by zero check */
 165 #define BRK_RANGE       8       /* Range error check */
 166 #define BRK_STACKOVERFLOW 9     /* For Ada stackchecking */
 167 #define BRK_NORLD       10      /* No rld found - not used by Linux/MIPS */
 168 #define _BRK_THREADBP   11      /* For threads, user bp (used by debuggers) */
 169 #define BRK_MULOVF      1023    /* Multiply overflow */
 170 #endif /* defined (__KERNEL__) || defined (__USE_MISC) */
 171
 172 #endif /* !defined (__ASM_MIPS_SIGNAL_H) */