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 - 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 64 16#define _NSIG_WORDS (_NSIG / _NSIG_BPW) 17 18typedef struct { 19 unsigned long sig[_NSIG_WORDS]; 20} sigset_t; 21 22#define _NSIG32 128 23#define _NSIG_BPW32 32 24#define _NSIG_WORDS32 (_NSIG32 / _NSIG_BPW32) 25 26typedef struct { 27 unsigned int sig[_NSIG_WORDS32]; 28} sigset_t32; 29 30typedef unsigned long old_sigset_t; /* at least 32 bits */ 31typedef unsigned int old_sigset_t32; 32 33#define SIGHUP 1 /* Hangup (POSIX). */ 34#define SIGINT 2 /* Interrupt (ANSI). */ 35#define SIGQUIT 3 /* Quit (POSIX). */ 36#define SIGILL 4 /* Illegal instruction (ANSI). */ 37#define SIGTRAP 5 /* Trace trap (POSIX). */ 38#define SIGIOT 6 /* IOT trap (4.2 BSD). */ 39#define SIGABRT SIGIOT /* Abort (ANSI). */ 40#define SIGEMT 7 41#define SIGFPE 8 /* Floating-point exception (ANSI). */ 42#define SIGKILL 9 /* Kill, unblockable (POSIX). */ 43#define SIGBUS 10 /* BUS error (4.2 BSD). */ 44#define SIGSEGV 11 /* Segmentation violation (ANSI). */ 45#define SIGSYS 12 46#define SIGPIPE 13 /* Broken pipe (POSIX). */ 47#define SIGALRM 14 /* Alarm clock (POSIX). */ 48#define SIGTERM 15 /* Termination (ANSI). */ 49#define SIGUSR1 16 /* User-defined signal 1 (POSIX). */ 50#define SIGUSR2 17 /* User-defined signal 2 (POSIX). */ 51#define SIGCHLD 18 /* Child status has changed (POSIX). */ 52#define SIGCLD SIGCHLD /* Same as SIGCHLD (System V). */ 53#define SIGPWR 19 /* Power failure restart (System V). */ 54#define SIGWINCH 20 /* Window size change (4.3 BSD, Sun). */ 55#define SIGURG 21 /* Urgent condition on socket (4.2 BSD). */ 56#define SIGIO 22 /* I/O now possible (4.2 BSD). */ 57#define SIGPOLL SIGIO /* Pollable event occurred (System V). */ 58#define SIGSTOP 23 /* Stop, unblockable (POSIX). */ 59#define SIGTSTP 24 /* Keyboard stop (POSIX). */ 60#define SIGCONT 25 /* Continue (POSIX). */ 61#define SIGTTIN 26 /* Background read from tty (POSIX). */ 62#define SIGTTOU 27 /* Background write to tty (POSIX). */ 63#define SIGVTALRM 28 /* Virtual alarm clock (4.2 BSD). */ 64#define SIGPROF 29 /* Profiling alarm clock (4.2 BSD). */ 65#define SIGXCPU 30 /* CPU limit exceeded (4.2 BSD). */ 66#define SIGXFSZ 31 /* File size limit exceeded (4.2 BSD). */ 67 68/* These should not be considered constants from userland. */ 69#define SIGRTMIN 32 70#define SIGRTMAX (_NSIG-1) 71 72/* 73 * SA_FLAGS values: 74 * 75 * SA_ONSTACK indicates that a registered stack_t will be used. 76 * SA_INTERRUPT is a no-op, but left due to historical reasons. Use the 77 * SA_RESTART flag to get restarting signals (which were the default long ago) 78 * SA_NOCLDSTOP flag to turn off SIGCHLD when children stop. 79 * SA_RESETHAND clears the handler when the signal is delivered. 80 * SA_NOCLDWAIT flag on SIGCHLD to inhibit zombies. 81 * SA_NODEFER prevents the current signal from being masked in the handler. 82 * 83 * SA_ONESHOT and SA_NOMASK are the historical Linux names for the Single 84 * Unix names RESETHAND and NODEFER respectively. 85 */ 86#define SA_ONSTACK 0x08000000 87#define SA_RESETHAND 0x80000000 88#define SA_RESTART 0x10000000 89#define SA_SIGINFO 0x00000008 90#define SA_NODEFER 0x40000000 91#define SA_NOCLDWAIT 0x00010000 /* Not supported yet */ 92#define SA_NOCLDSTOP 0x00000001 93 94#define SA_NOMASK SA_NODEFER 95#define SA_ONESHOT SA_RESETHAND 96#define SA_INTERRUPT 0x20000000 /* dummy -- ignored */ 97 98#define SA_RESTORER 0x04000000 /* Only for o32 compat code */ 99 100/* 101 * sigaltstack controls 102 */ 103#define SS_ONSTACK 1 104#define SS_DISABLE 2 105 106#define MINSIGSTKSZ 2048 107#define SIGSTKSZ 8192 108 109#ifdef __KERNEL__ 110 111/* 112 * These values of sa_flags are used only by the kernel as part of the 113 * irq handling routines. 114 * 115 * SA_INTERRUPT is also used by the irq handling routines. 116 * SA_SHIRQ flag is for shared interrupt support on PCI and EISA. 117 */ 118#define SA_PROBE SA_ONESHOT 119#define SA_SAMPLE_RANDOM SA_RESTART 120#define SA_SHIRQ 0x02000000 121 122#endif /* __KERNEL__ */ 123 124#define SIG_BLOCK 1 /* for blocking signals */ 125#define SIG_UNBLOCK 2 /* for unblocking signals */ 126#define SIG_SETMASK 3 /* for setting the signal mask */ 127#define SIG_SETMASK32 256 /* Goodie from SGI for BSD compatibility: 128 set only the low 32 bit of the sigset. */ 129 130/* Type of a signal handler. */ 131typedef void (*__sighandler_t)(int); 132 133/* Fake signal functions */ 134#define SIG_DFL ((__sighandler_t)0) /* default signal handling */ 135#define SIG_IGN ((__sighandler_t)1) /* ignore signal */ 136#define SIG_ERR ((__sighandler_t)-1) /* error return from signal */ 137 138struct sigaction { 139 unsigned int sa_flags; 140 __sighandler_t sa_handler; 141 sigset_t sa_mask; 142 void (*sa_restorer)(void); 143 int sa_resv[1]; /* reserved */ 144}; 145 146struct k_sigaction { 147 struct sigaction sa; 148}; 149 150/* IRIX compatible stack_t */ 151typedef struct sigaltstack { 152 void *ss_sp; 153 size_t ss_size; 154 int ss_flags; 155} stack_t; 156 157#ifdef __KERNEL__ 158#include <asm/sigcontext.h> 159 160/* 161 * The following break codes are or were in use for specific purposes in 162 * other MIPS operating systems. Linux/MIPS doesn't use all of them. The 163 * unused ones are here as placeholders; we might encounter them in 164 * non-Linux/MIPS object files or make use of them in the future. 165 */ 166#define BRK_USERBP 0 /* User bp (used by debuggers) */ 167#define BRK_KERNELBP 1 /* Break in the kernel */ 168#define BRK_ABORT 2 /* Sometimes used by abort(3) to SIGIOT */ 169#define BRK_BD_TAKEN 3 /* For bd slot emulation - not implemented */ 170#define BRK_BD_NOTTAKEN 4 /* For bd slot emulation - not implemented */ 171#define BRK_SSTEPBP 5 /* User bp (used by debuggers) */ 172#define BRK_OVERFLOW 6 /* Overflow check */ 173#define BRK_DIVZERO 7 /* Divide by zero check */ 174#define BRK_RANGE 8 /* Range error check */ 175#define BRK_STACKOVERFLOW 9 /* For Ada stackchecking */ 176#define BRK_NORLD 10 /* No rld found - not used by Linux/MIPS */ 177#define _BRK_THREADBP 11 /* For threads, user bp (used by debuggers) */ 178#define BRK_MULOVF 1023 /* Multiply overflow */ 179#endif /* defined (__KERNEL__) || defined (__USE_MISC) */ 180 181#endif /* !defined (_ASM_SIGNAL_H) */ 182