include/asm-mips/signal.h

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (C) 1995, 96, 97, 98, 99, 2003 by Ralf Baechle
   7  * Copyright (C) 1999 Silicon Graphics, Inc.
   8  */
   9 #ifndef _ASM_SIGNAL_H
  10 #define _ASM_SIGNAL_H
  11
  12 #include <linux/config.h>
  13 #include <linux/types.h>
  14
  15 #define _NSIG           128
  16 #define _NSIG_BPW       (sizeof(unsigned long) * 8)
  17 #define _NSIG_WORDS     (_NSIG / _NSIG_BPW)
  18
  19 typedef struct {
  20         unsigned long sig[_NSIG_WORDS];
  21 } sigset_t;
  22
  23 typedef unsigned long old_sigset_t;             /* at least 32 bits */
  24
  25 #define SIGHUP           1      /* Hangup (POSIX).  */
  26 #define SIGINT           2      /* Interrupt (ANSI).  */
  27 #define SIGQUIT          3      /* Quit (POSIX).  */
  28 #define SIGILL           4      /* Illegal instruction (ANSI).  */
  29 #define SIGTRAP          5      /* Trace trap (POSIX).  */
  30 #define SIGIOT           6      /* IOT trap (4.2 BSD).  */
  31 #define SIGABRT          SIGIOT /* Abort (ANSI).  */
  32 #define SIGEMT           7
  33 #define SIGFPE           8      /* Floating-point exception (ANSI).  */
  34 #define SIGKILL          9      /* Kill, unblockable (POSIX).  */
  35 #define SIGBUS          10      /* BUS error (4.2 BSD).  */
  36 #define SIGSEGV         11      /* Segmentation violation (ANSI).  */
  37 #define SIGSYS          12
  38 #define SIGPIPE         13      /* Broken pipe (POSIX).  */
  39 #define SIGALRM         14      /* Alarm clock (POSIX).  */
  40 #define SIGTERM         15      /* Termination (ANSI).  */
  41 #define SIGUSR1         16      /* User-defined signal 1 (POSIX).  */
  42 #define SIGUSR2         17      /* User-defined signal 2 (POSIX).  */
  43 #define SIGCHLD         18      /* Child status has changed (POSIX).  */
  44 #define SIGCLD          SIGCHLD /* Same as SIGCHLD (System V).  */
  45 #define SIGPWR          19      /* Power failure restart (System V).  */
  46 #define SIGWINCH        20      /* Window size change (4.3 BSD, Sun).  */
  47 #define SIGURG          21      /* Urgent condition on socket (4.2 BSD).  */
  48 #define SIGIO           22      /* I/O now possible (4.2 BSD).  */
  49 #define SIGPOLL         SIGIO   /* Pollable event occurred (System V).  */
  50 #define SIGSTOP         23      /* Stop, unblockable (POSIX).  */
  51 #define SIGTSTP         24      /* Keyboard stop (POSIX).  */
  52 #define SIGCONT         25      /* Continue (POSIX).  */
  53 #define SIGTTIN         26      /* Background read from tty (POSIX).  */
  54 #define SIGTTOU         27      /* Background write to tty (POSIX).  */
  55 #define SIGVTALRM       28      /* Virtual alarm clock (4.2 BSD).  */
  56 #define SIGPROF         29      /* Profiling alarm clock (4.2 BSD).  */
  57 #define SIGXCPU         30      /* CPU limit exceeded (4.2 BSD).  */
  58 #define SIGXFSZ         31      /* File size limit exceeded (4.2 BSD).  */
  59
  60 /* These should not be considered constants from userland.  */
  61 #define SIGRTMIN        32
  62 #define SIGRTMAX        _NSIG
  63
  64 /*
  65  * SA_FLAGS values:
  66  *
  67  * SA_ONSTACK indicates that a registered stack_t will be used.
  68  * SA_INTERRUPT is a no-op, but left due to historical reasons. Use the
  69  * SA_RESTART flag to get restarting signals (which were the default long ago)
  70  * SA_NOCLDSTOP flag to turn off SIGCHLD when children stop.
  71  * SA_RESETHAND clears the handler when the signal is delivered.
  72  * SA_NOCLDWAIT flag on SIGCHLD to inhibit zombies.
  73  * SA_NODEFER prevents the current signal from being masked in the handler.
  74  *
  75  * SA_ONESHOT and SA_NOMASK are the historical Linux names for the Single
  76  * Unix names RESETHAND and NODEFER respectively.
  77  */
  78 #define SA_ONSTACK      0x08000000
  79 #define SA_RESETHAND    0x80000000
  80 #define SA_RESTART      0x10000000
  81 #define SA_SIGINFO      0x00000008
  82 #define SA_NODEFER      0x40000000
  83 #define SA_NOCLDWAIT    0x00010000
  84 #define SA_NOCLDSTOP    0x00000001
  85
  86 #define SA_NOMASK       SA_NODEFER
  87 #define SA_ONESHOT      SA_RESETHAND
  88 #define SA_INTERRUPT    0x20000000      /* dummy -- ignored */
  89
  90 #define SA_RESTORER     0x04000000      /* Only for o32 */
  91
  92 /*
  93  * sigaltstack controls
  94  */
  95 #define SS_ONSTACK     1
  96 #define SS_DISABLE     2
  97
  98 #define MINSIGSTKSZ    2048
  99 #define SIGSTKSZ       8192
 100
 101 #ifdef __KERNEL__
 102
 103 /*
 104  * These values of sa_flags are used only by the kernel as part of the
 105  * irq handling routines.
 106  *
 107  * SA_INTERRUPT is also used by the irq handling routines.
 108  * SA_SHIRQ flag is for shared interrupt support on PCI and EISA.
 109  */
 110 #define SA_PROBE                SA_ONESHOT
 111 #define SA_SAMPLE_RANDOM        SA_RESTART
 112 #define SA_SHIRQ                0x02000000
 113
 114 #endif /* __KERNEL__ */
 115
 116 #define SIG_BLOCK       1       /* for blocking signals */
 117 #define SIG_UNBLOCK     2       /* for unblocking signals */
 118 #define SIG_SETMASK     3       /* for setting the signal mask */
 119 #define SIG_SETMASK32   256     /* Goodie from SGI for BSD compatibility:
 120                                    set only the low 32 bit of the sigset.  */
 121
 122 /* Type of a signal handler.  */
 123 typedef void (*__sighandler_t)(int);
 124
 125 /* Fake signal functions */
 126 #define SIG_DFL ((__sighandler_t)0)     /* default signal handling */
 127 #define SIG_IGN ((__sighandler_t)1)     /* ignore signal */
 128 #define SIG_ERR ((__sighandler_t)-1)    /* error return from signal */
 129
 130 struct sigaction {
 131         unsigned int    sa_flags;
 132         __sighandler_t  sa_handler;
 133         sigset_t        sa_mask;
 134 };
 135
 136 struct k_sigaction {
 137         struct sigaction sa;
 138 #ifdef CONFIG_BINFMT_IRIX
 139         void            (*sa_restorer)(void);
 140 #endif
 141 };
 142
 143 /* IRIX compatible stack_t  */
 144 typedef struct sigaltstack {
 145         void *ss_sp;
 146         size_t ss_size;
 147         int ss_flags;
 148 } stack_t;
 149
 150 #ifdef __KERNEL__
 151 #include <asm/sigcontext.h>
 152
 153 /*
 154  * The following break codes are or were in use for specific purposes in
 155  * other MIPS operating systems.  Linux/MIPS doesn't use all of them.  The
 156  * unused ones are here as placeholders; we might encounter them in
 157  * non-Linux/MIPS object files or make use of them in the future.
 158  */
 159 #define BRK_USERBP      0       /* User bp (used by debuggers) */
 160 #define BRK_KERNELBP    1       /* Break in the kernel */
 161 #define BRK_ABORT       2       /* Sometimes used by abort(3) to SIGIOT */
 162 #define BRK_BD_TAKEN    3       /* For bd slot emulation - not implemented */
 163 #define BRK_BD_NOTTAKEN 4       /* For bd slot emulation - not implemented */
 164 #define BRK_SSTEPBP     5       /* User bp (used by debuggers) */
 165 #define BRK_OVERFLOW    6       /* Overflow check */
 166 #define BRK_DIVZERO     7       /* Divide by zero check */
 167 #define BRK_RANGE       8       /* Range error check */
 168 #define BRK_STACKOVERFLOW 9     /* For Ada stackchecking */
 169 #define BRK_NORLD       10      /* No rld found - not used by Linux/MIPS */
 170 #define _BRK_THREADBP   11      /* For threads, user bp (used by debuggers) */
 171 #define BRK_MULOVF      1023    /* Multiply overflow */
 172 #define BRK_BUG         512     /* Used by BUG() */
 173
 174 #define ptrace_signal_deliver(regs, cookie) do { } while (0)
 175
 176 #endif /* __KERNEL__ */
 177
 178 #endif /* _ASM_SIGNAL_H */