+++ /dev/null
-#ifndef _LWK_SIGNAL_H
-#define _LWK_SIGNAL_H
-
-#include <arch/signal.h>
-#include <arch/siginfo.h>
-
-#ifdef __KERNEL__
-#include <lwk/list.h>
-#include <lwk/spinlock.h>
-
-/*
- * 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 <lwk/bitops.h>
-
-/* We don't use <lwk/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 */
-
-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 <lwk/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 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 */