Include/asm-i386/signal.h
12017 #ifndef _ASMi386_SIGNAL_H 12018 #define _ASMi386_SIGNAL_H 12019 12020 #include <linux/types.h> 12021 12022 /* Avoid too many header ordering problems. */ 12023 struct siginfo; 12024 12025 #ifdef __KERNEL__ 12026 /* Most things should be clean enough to redefine this at 12027 * will, if care is taken to make libc match. */ 12028 12029 #define _NSIG 64 12030 #define _NSIG_BPW 32 12031 #define _NSIG_WORDS (_NSIG / _NSIG_BPW) 12032 12033 typedef unsigned long old_sigset_t; /* at least 32 bits*/ 12034
12035 typedef struct { 12036 unsigned long sig[_NSIG_WORDS]; 12037 } sigset_t; 12038 12039 #else 12040 /* Here we must cater to libcs that poke about in kernel 12041 * headers. */ 12042 12043 #define NSIG 32 12044 typedef unsigned long sigset_t; 12045 12046 #endif /* __KERNEL__ */ 12047 12048 #define SIGHUP 1 12049 #define SIGINT 2 12050 #define SIGQUIT 3 12051 #define SIGILL 4 12052 #define SIGTRAP 5 12053 #define SIGABRT 6 12054 #define SIGIOT 6 12055 #define SIGBUS 7 12056 #define SIGFPE 8 12057 #define SIGKILL 9 12058 #define SIGUSR1 10 12059 #define SIGSEGV 11 12060 #define SIGUSR2 12 12061 #define SIGPIPE 13 12062 #define SIGALRM 14 12063 #define SIGTERM 15 12064 #define SIGSTKFLT 16 12065 #define SIGCHLD 17 12066 #define SIGCONT 18 12067 #define SIGSTOP 19 12068 #define SIGTSTP 20 12069 #define SIGTTIN 21 12070 #define SIGTTOU 22 12071 #define SIGURG 23 12072 #define SIGXCPU 24 12073 #define SIGXFSZ 25 12074 #define SIGVTALRM 26 12075 #define SIGPROF 27 12076 #define SIGWINCH 28 12077 #define SIGIO 29 12078 #define SIGPOLL SIGIO 12079 /* 12080 #define SIGLOST 29 12081 */ 12082 #define SIGPWR 30 12083 #define SIGUNUSED 31 12084 12085 /* These should not be considered constants from 12086 * userland. */ 12087 #define SIGRTMIN 32 12088 #define SIGRTMAX (_NSIG-1) 12089 12090 /* SA_FLAGS values: 12091 * 12092 * SA_ONSTACK indicates that a registered stack_t will be 12093 * used. 12094 * SA_INTERRUPT is a no-op, but left due to historical 12095 * reasons. Use the 12096 * SA_RESTART flag to get restarting signals (which were 12097 * the default long ago) 12098 * SA_NOCLDSTOP flag to turn off SIGCHLD when children 12099 * stop. 12100 * SA_RESETHAND clears the handler when the signal is 12101 * delivered. 12102 * SA_NOCLDWAIT flag on SIGCHLD to inhibit zombies. 12103 * SA_NODEFER prevents the current signal from being 12104 * masked in the handler. 12105 * SA_ONESHOT and SA_NOMASK are the historical Linux 12106 * names for the Single Unix names RESETHAND and NODEFER 12107 * respectively. */ 12108 #define SA_NOCLDSTOP 0x00000001 12109 #define SA_NOCLDWAIT 0x00000002 /* not supported yet*/ 12110 #define SA_SIGINFO 0x00000004 12111 #define SA_ONSTACK 0x08000000 12112 #define SA_RESTART 0x10000000 12113 #define SA_NODEFER 0x40000000 12114 #define SA_RESETHAND 0x80000000 12115 12116 #define SA_NOMASK SA_NODEFER 12117 #define SA_ONESHOT SA_RESETHAND 12118 #define SA_INTERRUPT 0x20000000 /* dummy -- ignored */ 12119 12120 #define SA_RESTORER 0x04000000 12121 12122 /* sigaltstack controls */ 12123 #define SS_ONSTACK 1 12124 #define SS_DISABLE 2 12125 12126 #define MINSIGSTKSZ 2048 12127 #define SIGSTKSZ 8192 12128 12129 #ifdef __KERNEL__ 12130 12131 /* These values of sa_flags are used only by the kernel 12132 * as part of the irq handling routines. 12133 * 12134 * SA_INTERRUPT is also used by the irq handling 12135 * routines. 12136 * SA_SHIRQ is for shared interrupt support on PCI and 12137 * EISA. */ 12138 #define SA_PROBE SA_ONESHOT 12139 #define SA_SAMPLE_RANDOM SA_RESTART 12140 #define SA_SHIRQ 0x04000000 12141 #endif 12142 12143 #define SIG_BLOCK 0 /* for blocking signals */ 12144 #define SIG_UNBLOCK 1 /* for unblocking signals */ 12145 #define SIG_SETMASK 2 /* for setting the signal mask */ 12146 12147 /* Type of a signal handler. */ 12148 typedef void (*__sighandler_t)(int); 12149 12150 /* default signal handling */ 12151 #define SIG_DFL ((__sighandler_t)0) 12152 /* ignore signal */ 12153 #define SIG_IGN ((__sighandler_t)1) 12154 /* error return from signal */ 12155 #define SIG_ERR ((__sighandler_t)-1) 12156 12157 #ifdef __KERNEL__ 12158 struct old_sigaction { 12159 __sighandler_t sa_handler; 12160 old_sigset_t sa_mask; 12161 unsigned long sa_flags; 12162 void (*sa_restorer)(void); 12163 }; 12164
12165 struct sigaction { 12166 __sighandler_t sa_handler; 12167 unsigned long sa_flags; 12168 void (*sa_restorer)(void); 12169 sigset_t sa_mask; /* mask last for extensibility */ 12170 }; 12171 12172 struct k_sigaction { 12173 struct sigaction sa; 12174 }; 12175 #else 12176 /* Here we must cater to libcs that poke about in kernel 12177 * headers. */ 12178 struct sigaction { 12179 union { 12180 __sighandler_t _sa_handler; 12181 void (*_sa_sigaction)(int, struct siginfo *, void *); 12182 } _u; 12183 sigset_t sa_mask; 12184 unsigned long sa_flags; 12185 void (*sa_restorer)(void); 12186 }; 12187 12188 #define sa_handler _u._sa_handler 12189 #define sa_sigaction _u._sa_sigaction 12190 12191 #endif /* __KERNEL__ */ 12192 12193 typedef struct sigaltstack { 12194 void *ss_sp; 12195 int ss_flags; 12196 size_t ss_size; 12197 } stack_t; 12198 12199 #ifdef __KERNEL__ 12200 #include <asm/sigcontext.h> 12201 12202 #define __HAVE_ARCH_SIG_BITOPS 12203
12204 extern __inline__ void sigaddset(sigset_t *set, int _sig) 12205 { 12206 __asm__("btsl %1,%0" : "=m"(*set) : "ir"(_sig - 1) 12207 : "cc"); 12208 } 12209
12210 extern __inline__ void sigdelset(sigset_t *set, int _sig) 12211 { 12212 __asm__("btrl %1,%0" : "=m"(*set) : "ir"(_sig - 1) 12213 : "cc"); 12214 } 12215 12216 extern __inline__ int __const_sigismember(sigset_t *set, 12217 int _sig) 12218 { 12219 unsigned long sig = _sig - 1; 12220 return 1 & (set->sig[sig / _NSIG_BPW] >> 12221 (sig % _NSIG_BPW)); 12222 } 12223 12224 extern __inline__ int __gen_sigismember(sigset_t *set, 12225 int _sig) 12226 { 12227 int ret; 12228 __asm__("btl %2,%1\n\tsbbl %0,%0" 12229 : "=r"(ret) : "m"(*set), "ir"(_sig-1) : "cc"); 12230 return ret; 12231 } 12232
12233 #define sigismember(set,sig) \ 12234 (__builtin_constant_p(sig) ? \ 12235 __const_sigismember((set),(sig)) : \ 12236 __gen_sigismember((set),(sig))) 12237
12238 #define sigmask(sig) (1UL << ((sig) - 1)) 12239
12240 extern __inline__ int sigfindinword(unsigned long word) 12241 { 12242 __asm__("bsfl %1,%0" : "=r"(word) : "rm"(word) : "cc"); 12243 return word; 12244 } 12245 12246 #endif /* __KERNEL__ */ 12247 12248 #endif
