diff options
Diffstat (limited to 'include/linux/signal.h')
| -rw-r--r-- | include/linux/signal.h | 224 |
1 files changed, 224 insertions, 0 deletions
diff --git a/include/linux/signal.h b/include/linux/signal.h new file mode 100644 index 00000000000..99c97ad026c --- /dev/null +++ b/include/linux/signal.h @@ -0,0 +1,224 @@ +#ifndef _LINUX_SIGNAL_H +#define _LINUX_SIGNAL_H + +#include <linux/list.h> +#include <linux/spinlock.h> +#include <asm/signal.h> +#include <asm/siginfo.h> + +#ifdef __KERNEL__ + +/* + * Real Time signals may be queued. + */ + +struct sigqueue { + struct list_head list; + spinlock_t *lock; + int flags; + siginfo_t info; + struct user_struct *user; +}; + +/* flags values. */ +#define SIGQUEUE_PREALLOC 1 + +struct sigpending { + struct list_head list; + sigset_t signal; +}; + +/* + * Define some primitives to manipulate sigset_t. + */ + +#ifndef __HAVE_ARCH_SIG_BITOPS +#include <linux/bitops.h> + +/* We don't use <linux/bitops.h> for these because there is no need to + be atomic. */ +static inline void sigaddset(sigset_t *set, int _sig) +{ + unsigned long sig = _sig - 1; + if (_NSIG_WORDS == 1) + set->sig[0] |= 1UL << sig; + else + set->sig[sig / _NSIG_BPW] |= 1UL << (sig % _NSIG_BPW); +} + +static inline void sigdelset(sigset_t *set, int _sig) +{ + unsigned long sig = _sig - 1; + if (_NSIG_WORDS == 1) + set->sig[0] &= ~(1UL << sig); + else + set->sig[sig / _NSIG_BPW] &= ~(1UL << (sig % _NSIG_BPW)); +} + +static inline int sigismember(sigset_t *set, int _sig) +{ + unsigned long sig = _sig - 1; + if (_NSIG_WORDS == 1) + return 1 & (set->sig[0] >> sig); + else + return 1 & (set->sig[sig / _NSIG_BPW] >> (sig % _NSIG_BPW)); +} + +static inline int sigfindinword(unsigned long word) +{ + return ffz(~word); +} + +#endif /* __HAVE_ARCH_SIG_BITOPS */ + +#define sigmask(sig) (1UL << ((sig) - 1)) + +#ifndef __HAVE_ARCH_SIG_SETOPS +#include <linux/string.h> + +#define _SIG_SET_BINOP(name, op) \ +static inline void name(sigset_t *r, const sigset_t *a, const sigset_t *b) \ +{ \ + extern void _NSIG_WORDS_is_unsupported_size(void); \ + unsigned long a0, a1, a2, a3, b0, b1, b2, b3; \ + \ + switch (_NSIG_WORDS) { \ + case 4: \ + a3 = a->sig[3]; a2 = a->sig[2]; \ + b3 = b->sig[3]; b2 = b->sig[2]; \ + r->sig[3] = op(a3, b3); \ + r->sig[2] = op(a2, b2); \ + case 2: \ + a1 = a->sig[1]; b1 = b->sig[1]; \ + r->sig[1] = op(a1, b1); \ + case 1: \ + a0 = a->sig[0]; b0 = b->sig[0]; \ + r->sig[0] = op(a0, b0); \ + break; \ + default: \ + _NSIG_WORDS_is_unsupported_size(); \ + } \ +} + +#define _sig_or(x,y) ((x) | (y)) +_SIG_SET_BINOP(sigorsets, _sig_or) + +#define _sig_and(x,y) ((x) & (y)) +_SIG_SET_BINOP(sigandsets, _sig_and) + +#define _sig_nand(x,y) ((x) & ~(y)) +_SIG_SET_BINOP(signandsets, _sig_nand) + +#undef _SIG_SET_BINOP +#undef _sig_or +#undef _sig_and +#undef _sig_nand + +#define _SIG_SET_OP(name, op) \ +static inline void name(sigset_t *set) \ +{ \ + extern void _NSIG_WORDS_is_unsupported_size(void); \ + \ + switch (_NSIG_WORDS) { \ + case 4: set->sig[3] = op(set->sig[3]); \ + set->sig[2] = op(set->sig[2]); \ + case 2: set->sig[1] = op(set->sig[1]); \ + case 1: set->sig[0] = op(set->sig[0]); \ + break; \ + default: \ + _NSIG_WORDS_is_unsupported_size(); \ + } \ +} + +#define _sig_not(x) (~(x)) +_SIG_SET_OP(signotset, _sig_not) + +#undef _SIG_SET_OP +#undef _sig_not + +static inline void sigemptyset(sigset_t *set) +{ + switch (_NSIG_WORDS) { + default: + memset(set, 0, sizeof(sigset_t)); + break; + case 2: set->sig[1] = 0; + case 1: set->sig[0] = 0; + break; + } +} + +static inline void sigfillset(sigset_t *set) +{ + switch (_NSIG_WORDS) { + default: + memset(set, -1, sizeof(sigset_t)); + break; + case 2: set->sig[1] = -1; + case 1: set->sig[0] = -1; + break; + } +} + +/* Some extensions for manipulating the low 32 signals in particular. */ + +static inline void sigaddsetmask(sigset_t *set, unsigned long mask) +{ + set->sig[0] |= mask; +} + +static inline void sigdelsetmask(sigset_t *set, unsigned long mask) +{ + set->sig[0] &= ~mask; +} + +static inline int sigtestsetmask(sigset_t *set, unsigned long mask) +{ + return (set->sig[0] & mask) != 0; +} + +static inline void siginitset(sigset_t *set, unsigned long mask) +{ + set->sig[0] = mask; + switch (_NSIG_WORDS) { + default: + memset(&set->sig[1], 0, sizeof(long)*(_NSIG_WORDS-1)); + break; + case 2: set->sig[1] = 0; + case 1: ; + } +} + +static inline void siginitsetinv(sigset_t *set, unsigned long mask) +{ + set->sig[0] = ~mask; + switch (_NSIG_WORDS) { + default: + memset(&set->sig[1], -1, sizeof(long)*(_NSIG_WORDS-1)); + break; + case 2: set->sig[1] = -1; + case 1: ; + } +} + +#endif /* __HAVE_ARCH_SIG_SETOPS */ + +static inline void init_sigpending(struct sigpending *sig) +{ + sigemptyset(&sig->signal); + INIT_LIST_HEAD(&sig->list); +} + +extern int group_send_sig_info(int sig, struct siginfo *info, struct task_struct *p); +extern int __group_send_sig_info(int, struct siginfo *, struct task_struct *); +extern long do_sigpending(void __user *, unsigned long); +extern int sigprocmask(int, sigset_t *, sigset_t *); + +#ifndef HAVE_ARCH_GET_SIGNAL_TO_DELIVER +struct pt_regs; +extern int get_signal_to_deliver(siginfo_t *info, struct k_sigaction *return_ka, struct pt_regs *regs, void *cookie); +#endif + +#endif /* __KERNEL__ */ + +#endif /* _LINUX_SIGNAL_H */ |