1 #ifndef _ASMi386_SIGNAL_H
2 #define _ASMi386_SIGNAL_H
4 #include <linux/types.h>
5 #include <linux/linkage.h>
6 #include <linux/time.h>
8 /* Avoid too many header ordering problems. */
12 /* Most things should be clean enough to redefine this at will, if care
13 is taken to make libc match. */
17 #define _NSIG_WORDS (_NSIG / _NSIG_BPW)
19 typedef unsigned long old_sigset_t; /* at least 32 bits */
22 unsigned long sig[_NSIG_WORDS];
26 /* Here we must cater to libcs that poke about in kernel headers. */
29 typedef unsigned long sigset_t;
31 #endif /* __KERNEL__ */
71 /* These should not be considered constants from userland. */
73 #define SIGRTMAX _NSIG
78 * SA_ONSTACK indicates that a registered stack_t will be used.
79 * SA_INTERRUPT is a no-op, but left due to historical reasons. Use the
80 * SA_RESTART flag to get restarting signals (which were the default long ago)
81 * SA_NOCLDSTOP flag to turn off SIGCHLD when children stop.
82 * SA_RESETHAND clears the handler when the signal is delivered.
83 * SA_NOCLDWAIT flag on SIGCHLD to inhibit zombies.
84 * SA_NODEFER prevents the current signal from being masked in the handler.
86 * SA_ONESHOT and SA_NOMASK are the historical Linux names for the Single
87 * Unix names RESETHAND and NODEFER respectively.
89 #define SA_NOCLDSTOP 0x00000001u
90 #define SA_NOCLDWAIT 0x00000002u
91 #define SA_SIGINFO 0x00000004u
92 #define SA_ONSTACK 0x08000000u
93 #define SA_RESTART 0x10000000u
94 #define SA_NODEFER 0x40000000u
95 #define SA_RESETHAND 0x80000000u
97 #define SA_NOMASK SA_NODEFER
98 #define SA_ONESHOT SA_RESETHAND
99 #define SA_INTERRUPT 0x20000000 /* dummy -- ignored */
101 #define SA_RESTORER 0x04000000
104 * sigaltstack controls
109 #define MINSIGSTKSZ 2048
110 #define SIGSTKSZ 8192
115 * These values of sa_flags are used only by the kernel as part of the
116 * irq handling routines.
118 * SA_INTERRUPT is also used by the irq handling routines.
119 * SA_SHIRQ is for shared interrupt support on PCI and EISA.
121 #define SA_PROBE SA_ONESHOT
122 #define SA_SAMPLE_RANDOM SA_RESTART
123 #define SA_SHIRQ 0x04000000
126 #define SIG_BLOCK 0 /* for blocking signals */
127 #define SIG_UNBLOCK 1 /* for unblocking signals */
128 #define SIG_SETMASK 2 /* for setting the signal mask */
130 /* Type of a signal handler. */
131 typedef void (*__sighandler_t)(int);
133 #define SIG_DFL ((__sighandler_t)0) /* default signal handling */
134 #define SIG_IGN ((__sighandler_t)1) /* ignore signal */
135 #define SIG_ERR ((__sighandler_t)-1) /* error return from signal */
138 struct old_sigaction {
139 __sighandler_t sa_handler;
140 old_sigset_t sa_mask;
141 unsigned long sa_flags;
142 void (*sa_restorer)(void);
146 __sighandler_t sa_handler;
147 unsigned long sa_flags;
148 void (*sa_restorer)(void);
149 sigset_t sa_mask; /* mask last for extensibility */
156 /* Here we must cater to libcs that poke about in kernel headers. */
160 __sighandler_t _sa_handler;
161 void (*_sa_sigaction)(int, struct siginfo *, void *);
164 unsigned long sa_flags;
165 void (*sa_restorer)(void);
168 #define sa_handler _u._sa_handler
169 #define sa_sigaction _u._sa_sigaction
171 #endif /* __KERNEL__ */
173 typedef struct sigaltstack {
180 #include <asm/sigcontext.h>
182 #define __HAVE_ARCH_SIG_BITOPS
184 static __inline__ void sigaddset(sigset_t *set, int _sig)
186 __asm__("btsl %1,%0" : "=m"(*set) : "Ir"(_sig - 1) : "cc");
189 static __inline__ void sigdelset(sigset_t *set, int _sig)
191 __asm__("btrl %1,%0" : "=m"(*set) : "Ir"(_sig - 1) : "cc");
194 static __inline__ int __const_sigismember(sigset_t *set, int _sig)
196 unsigned long sig = _sig - 1;
197 return 1 & (set->sig[sig / _NSIG_BPW] >> (sig % _NSIG_BPW));
200 static __inline__ int __gen_sigismember(sigset_t *set, int _sig)
203 __asm__("btl %2,%1\n\tsbbl %0,%0"
204 : "=r"(ret) : "m"(*set), "Ir"(_sig-1) : "cc");
208 #define sigismember(set,sig) \
209 (__builtin_constant_p(sig) ? \
210 __const_sigismember((set),(sig)) : \
211 __gen_sigismember((set),(sig)))
213 static __inline__ int sigfindinword(unsigned long word)
215 __asm__("bsfl %1,%0" : "=r"(word) : "rm"(word) : "cc");
220 extern int FASTCALL(do_signal(struct pt_regs *regs, sigset_t *oldset));
221 #define ptrace_signal_deliver(regs, cookie) do { } while (0)
223 #endif /* __KERNEL__ */