184 lines
6.1 KiB
C
184 lines
6.1 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 1995, 96, 97, 98, 99, 2003 by Ralf Baechle
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* Copyright (C) 1999 Silicon Graphics, Inc.
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*/
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#ifndef _ASM_SIGNAL_H
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#define _ASM_SIGNAL_H
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#include <linux/config.h>
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#include <linux/types.h>
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#define _NSIG 128
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#define _NSIG_BPW (sizeof(unsigned long) * 8)
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#define _NSIG_WORDS (_NSIG / _NSIG_BPW)
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typedef struct {
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unsigned long sig[_NSIG_WORDS];
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} sigset_t;
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typedef unsigned long old_sigset_t; /* at least 32 bits */
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#define SIGHUP 1 /* Hangup (POSIX). */
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#define SIGINT 2 /* Interrupt (ANSI). */
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#define SIGQUIT 3 /* Quit (POSIX). */
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#define SIGILL 4 /* Illegal instruction (ANSI). */
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#define SIGTRAP 5 /* Trace trap (POSIX). */
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#define SIGIOT 6 /* IOT trap (4.2 BSD). */
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#define SIGABRT SIGIOT /* Abort (ANSI). */
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#define SIGEMT 7
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#define SIGFPE 8 /* Floating-point exception (ANSI). */
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#define SIGKILL 9 /* Kill, unblockable (POSIX). */
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#define SIGBUS 10 /* BUS error (4.2 BSD). */
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#define SIGSEGV 11 /* Segmentation violation (ANSI). */
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#define SIGSYS 12
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#define SIGPIPE 13 /* Broken pipe (POSIX). */
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#define SIGALRM 14 /* Alarm clock (POSIX). */
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#define SIGTERM 15 /* Termination (ANSI). */
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#define SIGUSR1 16 /* User-defined signal 1 (POSIX). */
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#define SIGUSR2 17 /* User-defined signal 2 (POSIX). */
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#define SIGCHLD 18 /* Child status has changed (POSIX). */
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#define SIGCLD SIGCHLD /* Same as SIGCHLD (System V). */
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#define SIGPWR 19 /* Power failure restart (System V). */
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#define SIGWINCH 20 /* Window size change (4.3 BSD, Sun). */
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#define SIGURG 21 /* Urgent condition on socket (4.2 BSD). */
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#define SIGIO 22 /* I/O now possible (4.2 BSD). */
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#define SIGPOLL SIGIO /* Pollable event occurred (System V). */
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#define SIGSTOP 23 /* Stop, unblockable (POSIX). */
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#define SIGTSTP 24 /* Keyboard stop (POSIX). */
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#define SIGCONT 25 /* Continue (POSIX). */
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#define SIGTTIN 26 /* Background read from tty (POSIX). */
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#define SIGTTOU 27 /* Background write to tty (POSIX). */
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#define SIGVTALRM 28 /* Virtual alarm clock (4.2 BSD). */
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#define SIGPROF 29 /* Profiling alarm clock (4.2 BSD). */
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#define SIGXCPU 30 /* CPU limit exceeded (4.2 BSD). */
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#define SIGXFSZ 31 /* File size limit exceeded (4.2 BSD). */
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/* These should not be considered constants from userland. */
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#define SIGRTMIN 32
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#define SIGRTMAX _NSIG
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/*
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* SA_FLAGS values:
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*
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* SA_ONSTACK indicates that a registered stack_t will be used.
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* SA_INTERRUPT is a no-op, but left due to historical reasons. Use the
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* SA_RESTART flag to get restarting signals (which were the default long ago)
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* SA_NOCLDSTOP flag to turn off SIGCHLD when children stop.
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* SA_RESETHAND clears the handler when the signal is delivered.
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* SA_NOCLDWAIT flag on SIGCHLD to inhibit zombies.
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* SA_NODEFER prevents the current signal from being masked in the handler.
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*
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* SA_ONESHOT and SA_NOMASK are the historical Linux names for the Single
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* Unix names RESETHAND and NODEFER respectively.
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*/
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#define SA_ONSTACK 0x08000000
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#define SA_RESETHAND 0x80000000
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#define SA_RESTART 0x10000000
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#define SA_SIGINFO 0x00000008
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#define SA_NODEFER 0x40000000
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#define SA_NOCLDWAIT 0x00010000
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#define SA_NOCLDSTOP 0x00000001
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#define SA_NOMASK SA_NODEFER
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#define SA_ONESHOT SA_RESETHAND
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#define SA_INTERRUPT 0x20000000 /* dummy -- ignored */
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#define SA_RESTORER 0x04000000 /* Only for o32 */
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/*
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* sigaltstack controls
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*/
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#define SS_ONSTACK 1
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#define SS_DISABLE 2
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#define MINSIGSTKSZ 2048
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#define SIGSTKSZ 8192
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#ifdef __KERNEL__
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/*
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* These values of sa_flags are used only by the kernel as part of the
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* irq handling routines.
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*
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* SA_INTERRUPT is also used by the irq handling routines.
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* SA_SHIRQ flag is for shared interrupt support on PCI and EISA.
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*/
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#define SA_SAMPLE_RANDOM SA_RESTART
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#ifdef CONFIG_TRAD_SIGNALS
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#define sig_uses_siginfo(ka) ((ka)->sa.sa_flags & SA_SIGINFO)
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#else
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#define sig_uses_siginfo(ka) (1)
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#endif
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#endif /* __KERNEL__ */
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#define SIG_BLOCK 1 /* for blocking signals */
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#define SIG_UNBLOCK 2 /* for unblocking signals */
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#define SIG_SETMASK 3 /* for setting the signal mask */
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#define SIG_SETMASK32 256 /* Goodie from SGI for BSD compatibility:
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set only the low 32 bit of the sigset. */
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/* Type of a signal handler. */
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typedef void __signalfn_t(int);
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typedef __signalfn_t __user *__sighandler_t;
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/* Fake signal functions */
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#define SIG_DFL ((__sighandler_t)0) /* default signal handling */
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#define SIG_IGN ((__sighandler_t)1) /* ignore signal */
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#define SIG_ERR ((__sighandler_t)-1) /* error return from signal */
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struct sigaction {
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unsigned int sa_flags;
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__sighandler_t sa_handler;
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sigset_t sa_mask;
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};
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struct k_sigaction {
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struct sigaction sa;
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#ifdef CONFIG_BINFMT_IRIX
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void (*sa_restorer)(void);
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#endif
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};
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/* IRIX compatible stack_t */
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typedef struct sigaltstack {
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void *ss_sp;
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size_t ss_size;
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int ss_flags;
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} stack_t;
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#ifdef __KERNEL__
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#include <asm/sigcontext.h>
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/*
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* The following break codes are or were in use for specific purposes in
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* other MIPS operating systems. Linux/MIPS doesn't use all of them. The
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* unused ones are here as placeholders; we might encounter them in
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* non-Linux/MIPS object files or make use of them in the future.
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*/
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#define BRK_USERBP 0 /* User bp (used by debuggers) */
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#define BRK_KERNELBP 1 /* Break in the kernel */
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#define BRK_ABORT 2 /* Sometimes used by abort(3) to SIGIOT */
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#define BRK_BD_TAKEN 3 /* For bd slot emulation - not implemented */
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#define BRK_BD_NOTTAKEN 4 /* For bd slot emulation - not implemented */
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#define BRK_SSTEPBP 5 /* User bp (used by debuggers) */
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#define BRK_OVERFLOW 6 /* Overflow check */
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#define BRK_DIVZERO 7 /* Divide by zero check */
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#define BRK_RANGE 8 /* Range error check */
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#define BRK_STACKOVERFLOW 9 /* For Ada stackchecking */
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#define BRK_NORLD 10 /* No rld found - not used by Linux/MIPS */
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#define _BRK_THREADBP 11 /* For threads, user bp (used by debuggers) */
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#define BRK_MULOVF 1023 /* Multiply overflow */
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#define BRK_BUG 512 /* Used by BUG() */
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#define ptrace_signal_deliver(regs, cookie) do { } while (0)
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#endif /* __KERNEL__ */
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#endif /* _ASM_SIGNAL_H */
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