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
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