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/types.h>
  13
  14 #define _NSIG           128
  15 #define _NSIG_BPW       (sizeof(unsigned long) * 8)
  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
  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_ONSTACK      0x08000000
  78 #define SA_RESETHAND    0x80000000
  79 #define SA_RESTART      0x10000000
  80 #define SA_SIGINFO      0x00000008
  81 #define SA_NODEFER      0x40000000
  82 #define SA_NOCLDWAIT    0x00010000
  83 #define SA_NOCLDSTOP    0x00000001
  84
  85 #define SA_NOMASK       SA_NODEFER
  86 #define SA_ONESHOT      SA_RESETHAND
  87 #define SA_INTERRUPT    0x20000000      /* dummy -- ignored */
  88
  89 #define SA_RESTORER     0x04000000      /* Only for o32 */
  90
  91 /*
  92  * sigaltstack controls
  93  */
  94 #define SS_ONSTACK     1
  95 #define SS_DISABLE     2
  96
  97 #define MINSIGSTKSZ    2048
  98 #define SIGSTKSZ       8192
  99
 100 #ifdef __KERNEL__
 101
 102 /*
 103  * These values of sa_flags are used only by the kernel as part of the
 104  * irq handling routines.
 105  *
 106  * SA_INTERRUPT is also used by the irq handling routines.
 107  * SA_SHIRQ flag is for shared interrupt support on PCI and EISA.
 108  */
 109 #define SA_SAMPLE_RANDOM        SA_RESTART
 110
 111 #ifdef CONFIG_TRAD_SIGNALS
 112 #define sig_uses_siginfo(ka)    ((ka)->sa.sa_flags & SA_SIGINFO)
 113 #else
 114 #define sig_uses_siginfo(ka)    (1)
 115 #endif
 116
 117 #endif /* __KERNEL__ */
 118
 119 #define SIG_BLOCK       1       /* for blocking signals */
 120 #define SIG_UNBLOCK     2       /* for unblocking signals */
 121 #define SIG_SETMASK     3       /* for setting the signal mask */
 122 #define SIG_SETMASK32   256     /* Goodie from SGI for BSD compatibility:
 123                                    set only the low 32 bit of the sigset.  */
 124
 125 /* Type of a signal handler.  */
 126 typedef void __signalfn_t(int);
 127 typedef __signalfn_t __user *__sighandler_t;
 128
 129 /* Fake signal functions */
 130 #define SIG_DFL ((__sighandler_t)0)     /* default signal handling */
 131 #define SIG_IGN ((__sighandler_t)1)     /* ignore signal */
 132 #define SIG_ERR ((__sighandler_t)-1)    /* error return from signal */
 133
 134 struct sigaction {
 135         unsigned int    sa_flags;
 136         __sighandler_t  sa_handler;
 137         sigset_t        sa_mask;
 138 };
 139
 140 struct k_sigaction {
 141         struct sigaction sa;
 142 #ifdef CONFIG_BINFMT_IRIX
 143         void            (*sa_restorer)(void);
 144 #endif
 145 };
 146
 147 /* IRIX compatible stack_t  */
 148 typedef struct sigaltstack {
 149         void __user *ss_sp;
 150         size_t ss_size;
 151         int ss_flags;
 152 } stack_t;
 153
 154 #ifdef __KERNEL__
 155 #include <asm/sigcontext.h>
 156 #include <asm/siginfo.h>
 157
 158 #define ptrace_signal_deliver(regs, cookie) do { } while (0)
 159
 160 struct pt_regs;
 161 extern void do_signal(struct pt_regs *regs);
 162 extern void do_signal32(struct pt_regs *regs);
 163
 164 extern int setup_frame(struct k_sigaction * ka, struct pt_regs *regs,
 165         int signr, sigset_t *set);
 166 extern int setup_rt_frame(struct k_sigaction * ka, struct pt_regs *regs,
 167         int signr, sigset_t *set, siginfo_t *info);
 168
 169 extern int setup_frame_32(struct k_sigaction * ka, struct pt_regs *regs,
 170         int signr, sigset_t *set);
 171 extern int setup_rt_frame_32(struct k_sigaction * ka, struct pt_regs *regs,
 172         int signr, sigset_t *set, siginfo_t *info);
 173
 174 extern int setup_rt_frame_n32(struct k_sigaction * ka, struct pt_regs *regs,
 175         int signr, sigset_t *set, siginfo_t *info);
 176
 177 #endif /* __KERNEL__ */
 178
 179 #endif /* _ASM_SIGNAL_H */