X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=kitten%2Finclude%2Flwk%2Fsignal.h;fp=kitten%2Finclude%2Flwk%2Fsignal.h;h=0000000000000000000000000000000000000000;hb=80d6ccd14cca51eec611cc96cf1e39c7a9c98421;hp=642d40028dd4eefb0d3c0d1f3fcf0f70c0693e3e;hpb=e5d7715c14a23e72d742d402d4e4cdf97ffab697;p=palacios.releases.git diff --git a/kitten/include/lwk/signal.h b/kitten/include/lwk/signal.h deleted file mode 100644 index 642d400..0000000 --- a/kitten/include/lwk/signal.h +++ /dev/null @@ -1,374 +0,0 @@ -#ifndef _LWK_SIGNAL_H -#define _LWK_SIGNAL_H - -#include -#include - -#ifdef __KERNEL__ -#include -#include - -/* - * Real Time signals may be queued. - */ - -struct sigqueue { - struct list_head list; - 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 - -/* We don't use 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 */ - -static inline int sigisemptyset(sigset_t *set) -{ - extern void _NSIG_WORDS_is_unsupported_size(void); - switch (_NSIG_WORDS) { - case 4: - return (set->sig[3] | set->sig[2] | - set->sig[1] | set->sig[0]) == 0; - case 2: - return (set->sig[1] | set->sig[0]) == 0; - case 1: - return set->sig[0] == 0; - default: - _NSIG_WORDS_is_unsupported_size(); - return 0; - } -} - -#define sigmask(sig) (1UL << ((sig) - 1)) - -#ifndef __HAVE_ARCH_SIG_SETOPS -#include - -#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 void flush_sigqueue(struct sigpending *queue); - -/* Test if 'sig' is valid signal. Use this instead of testing _NSIG directly */ -static inline int valid_signal(unsigned long sig) -{ - return sig <= _NSIG ? 1 : 0; -} - -extern int next_signal(struct sigpending *pending, sigset_t *mask); -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 *); - -struct pt_regs; -extern int get_signal_to_deliver(siginfo_t *info, struct k_sigaction *return_ka, struct pt_regs *regs, void *cookie); - -extern struct kmem_cache *sighand_cachep; - -/* - * In POSIX a signal is sent either to a specific thread (LWK task) - * or to the process as a whole (LWK thread group). How the signal - * is sent determines whether it's to one thread or the whole group, - * which determines which signal mask(s) are involved in blocking it - * from being delivered until later. When the signal is delivered, - * either it's caught or ignored by a user handler or it has a default - * effect that applies to the whole thread group (POSIX process). - * - * The possible effects an unblocked signal set to SIG_DFL can have are: - * ignore - Nothing Happens - * terminate - kill the process, i.e. all threads in the group, - * similar to exit_group. The group leader (only) reports - * WIFSIGNALED status to its parent. - * coredump - write a core dump file describing all threads using - * the same mm and then kill all those threads - * stop - stop all the threads in the group, i.e. TASK_STOPPED state - * - * SIGKILL and SIGSTOP cannot be caught, blocked, or ignored. - * Other signals when not blocked and set to SIG_DFL behaves as follows. - * The job control signals also have other special effects. - * - * +--------------------+------------------+ - * | POSIX signal | default action | - * +--------------------+------------------+ - * | SIGHUP | terminate | - * | SIGINT | terminate | - * | SIGQUIT | coredump | - * | SIGILL | coredump | - * | SIGTRAP | coredump | - * | SIGABRT/SIGIOT | coredump | - * | SIGBUS | coredump | - * | SIGFPE | coredump | - * | SIGKILL | terminate(+) | - * | SIGUSR1 | terminate | - * | SIGSEGV | coredump | - * | SIGUSR2 | terminate | - * | SIGPIPE | terminate | - * | SIGALRM | terminate | - * | SIGTERM | terminate | - * | SIGCHLD | ignore | - * | SIGCONT | ignore(*) | - * | SIGSTOP | stop(*)(+) | - * | SIGTSTP | stop(*) | - * | SIGTTIN | stop(*) | - * | SIGTTOU | stop(*) | - * | SIGURG | ignore | - * | SIGXCPU | coredump | - * | SIGXFSZ | coredump | - * | SIGVTALRM | terminate | - * | SIGPROF | terminate | - * | SIGPOLL/SIGIO | terminate | - * | SIGSYS/SIGUNUSED | coredump | - * | SIGSTKFLT | terminate | - * | SIGWINCH | ignore | - * | SIGPWR | terminate | - * | SIGRTMIN-SIGRTMAX | terminate | - * +--------------------+------------------+ - * | non-POSIX signal | default action | - * +--------------------+------------------+ - * | SIGEMT | coredump | - * +--------------------+------------------+ - * - * (+) For SIGKILL and SIGSTOP the action is "always", not just "default". - * (*) Special job control effects: - * When SIGCONT is sent, it resumes the process (all threads in the group) - * from TASK_STOPPED state and also clears any pending/queued stop signals - * (any of those marked with "stop(*)"). This happens regardless of blocking, - * catching, or ignoring SIGCONT. When any stop signal is sent, it clears - * any pending/queued SIGCONT signals; this happens regardless of blocking, - * catching, or ignored the stop signal, though (except for SIGSTOP) the - * default action of stopping the process may happen later or never. - */ - -#ifdef SIGEMT -#define SIGEMT_MASK rt_sigmask(SIGEMT) -#else -#define SIGEMT_MASK 0 -#endif - -#if SIGRTMIN > BITS_PER_LONG -#define rt_sigmask(sig) (1ULL << ((sig)-1)) -#else -#define rt_sigmask(sig) sigmask(sig) -#endif -#define siginmask(sig, mask) (rt_sigmask(sig) & (mask)) - -#define SIG_KERNEL_ONLY_MASK (\ - rt_sigmask(SIGKILL) | rt_sigmask(SIGSTOP)) - -#define SIG_KERNEL_STOP_MASK (\ - rt_sigmask(SIGSTOP) | rt_sigmask(SIGTSTP) | \ - rt_sigmask(SIGTTIN) | rt_sigmask(SIGTTOU) ) - -#define SIG_KERNEL_COREDUMP_MASK (\ - rt_sigmask(SIGQUIT) | rt_sigmask(SIGILL) | \ - rt_sigmask(SIGTRAP) | rt_sigmask(SIGABRT) | \ - rt_sigmask(SIGFPE) | rt_sigmask(SIGSEGV) | \ - rt_sigmask(SIGBUS) | rt_sigmask(SIGSYS) | \ - rt_sigmask(SIGXCPU) | rt_sigmask(SIGXFSZ) | \ - SIGEMT_MASK ) - -#define SIG_KERNEL_IGNORE_MASK (\ - rt_sigmask(SIGCONT) | rt_sigmask(SIGCHLD) | \ - rt_sigmask(SIGWINCH) | rt_sigmask(SIGURG) ) - -#define sig_kernel_only(sig) \ - (((sig) < SIGRTMIN) && siginmask(sig, SIG_KERNEL_ONLY_MASK)) -#define sig_kernel_coredump(sig) \ - (((sig) < SIGRTMIN) && siginmask(sig, SIG_KERNEL_COREDUMP_MASK)) -#define sig_kernel_ignore(sig) \ - (((sig) < SIGRTMIN) && siginmask(sig, SIG_KERNEL_IGNORE_MASK)) -#define sig_kernel_stop(sig) \ - (((sig) < SIGRTMIN) && siginmask(sig, SIG_KERNEL_STOP_MASK)) - -#define sig_needs_tasklist(sig) ((sig) == SIGCONT) - -#define sig_user_defined(t, signr) \ - (((t)->sighand->action[(signr)-1].sa.sa_handler != SIG_DFL) && \ - ((t)->sighand->action[(signr)-1].sa.sa_handler != SIG_IGN)) - -#define sig_fatal(t, signr) \ - (!siginmask(signr, SIG_KERNEL_IGNORE_MASK|SIG_KERNEL_STOP_MASK) && \ - (t)->sighand->action[(signr)-1].sa.sa_handler == SIG_DFL) - -#endif /* __KERNEL__ */ - -#endif /* _LWK_SIGNAL_H */