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, 1996, 1997, 1998, 1999 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 32 16#define _NSIG_WORDS (_NSIG / _NSIG_BPW) 17 18typedef struct { 19 unsigned long sig[_NSIG_WORDS]; 20} sigset_t; 21 22typedef 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_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 /* Not supported yet */ 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 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_PROBE SA_ONESHOT 110#define SA_SAMPLE_RANDOM SA_RESTART 111#define SA_SHIRQ 0x02000000 112 113#endif /* __KERNEL__ */ 114 115#define SIG_BLOCK 1 /* for blocking signals */ 116#define SIG_UNBLOCK 2 /* for unblocking signals */ 117#define SIG_SETMASK 3 /* for setting the signal mask */ 118#define SIG_SETMASK32 256 /* Goodie from SGI for BSD compatibility: 119 set only the low 32 bit of the sigset. */ 120 121/* Type of a signal handler. */ 122typedef void (*__sighandler_t)(int); 123 124/* Fake signal functions */ 125#define SIG_DFL ((__sighandler_t)0) /* default signal handling */ 126#define SIG_IGN ((__sighandler_t)1) /* ignore signal */ 127#define SIG_ERR ((__sighandler_t)-1) /* error return from signal */ 128 129struct sigaction { 130 unsigned int sa_flags; 131 __sighandler_t sa_handler; 132 sigset_t sa_mask; 133 void (*sa_restorer)(void); 134 int sa_resv[1]; /* reserved */ 135}; 136 137struct k_sigaction { 138 struct sigaction sa; 139}; 140 141/* IRIX compatible stack_t */ 142typedef struct sigaltstack { 143 void *ss_sp; 144 size_t ss_size; 145 int ss_flags; 146} stack_t; 147 148#ifdef __KERNEL__ 149#include <asm/sigcontext.h> 150 151/* 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 */ 170 171#endif /* defined (__KERNEL__) */ 172 173#endif /* _ASM_SIGNAL_H */ 174