1999-12-14 22:35:36 +00:00
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/* $FreeBSD$ */
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#ifndef _OSF1_SIGNAL_H
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#define _OSF1_SIGNAL_H
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2000-11-10 23:00:54 +00:00
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#define OSF1_NSIG 64
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1999-12-14 22:35:36 +00:00
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#define OSF1_SIG_DFL 0
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#define OSF1_SIG_ERR -1
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#define OSF1_SIG_IGN 1
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#define OSF1_SIG_HOLD 2
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#define OSF1_SIGNO(a) ((a) & OSF1_SIGNO_MASK)
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#define OSF1_SIGCALL(a) ((a) & ~OSF1_SIGNO_MASK)
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#define OSF1_SIG_BLOCK 1
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#define OSF1_SIG_UNBLOCK 2
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#define OSF1_SIG_SETMASK 3
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typedef u_long osf1_sigset_t;
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2002-03-20 18:58:47 +00:00
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typedef void (*osf1_handler_t)(int);
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1999-12-14 22:35:36 +00:00
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struct osf1_sigaction {
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osf1_handler_t osa_handler;
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osf1_sigset_t osa_mask;
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int osa_flags;
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};
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struct osf1_sigaltstack {
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caddr_t ss_sp;
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int ss_flags;
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size_t ss_size;
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};
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/* sa_flags */
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#define OSF1_SA_ONSTACK 0x00000001
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#define OSF1_SA_RESTART 0x00000002
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#define OSF1_SA_NOCLDSTOP 0x00000004
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#define OSF1_SA_NODEFER 0x00000008
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#define OSF1_SA_RESETHAND 0x00000010
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#define OSF1_SA_NOCLDWAIT 0x00000020
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#define OSF1_SA_SIGINFO 0x00000040
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/* ss_flags */
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#define OSF1_SS_ONSTACK 0x00000001
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#define OSF1_SS_DISABLE 0x00000002
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#define OSF1_SIGNO_MASK 0x00FF
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#define OSF1_SIGNAL_MASK 0x0000
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#define OSF1_SIGDEFER_MASK 0x0100
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#define OSF1_SIGHOLD_MASK 0x0200
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#define OSF1_SIGRELSE_MASK 0x0400
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#define OSF1_SIGIGNORE_MASK 0x0800
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#define OSF1_SIGPAUSE_MASK 0x1000
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extern int osf1_to_linux_sig[];
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2002-03-20 18:58:47 +00:00
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void bsd_to_osf1_sigaltstack(const struct sigaltstack *, struct osf1_sigaltstack *);
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void bsd_to_osf1_sigset(const sigset_t *, osf1_sigset_t *);
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void osf1_to_bsd_sigaltstack(const struct osf1_sigaltstack *, struct sigaltstack *);
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void osf1_to_bsd_sigset(const osf1_sigset_t *, sigset_t *);
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1. Change prototype of trapsignal and sendsig to use ksiginfo_t *, most
changes in MD code are trivial, before this change, trapsignal and
sendsig use discrete parameters, now they uses member fields of
ksiginfo_t structure. For sendsig, this change allows us to pass
POSIX realtime signal value to user code.
2. Remove cpu_thread_siginfo, it is no longer needed because we now always
generate ksiginfo_t data and feed it to libpthread.
3. Add p_sigqueue to proc structure to hold shared signals which were
blocked by all threads in the proc.
4. Add td_sigqueue to thread structure to hold all signals delivered to
thread.
5. i386 and amd64 now return POSIX standard si_code, other arches will
be fixed.
6. In this sigqueue implementation, pending signal set is kept as before,
an extra siginfo list holds additional siginfo_t data for signals.
kernel code uses psignal() still behavior as before, it won't be failed
even under memory pressure, only exception is when deleting a signal,
we should call sigqueue_delete to remove signal from sigqueue but
not SIGDELSET. Current there is no kernel code will deliver a signal
with additional data, so kernel should be as stable as before,
a ksiginfo can carry more information, for example, allow signal to
be delivered but throw away siginfo data if memory is not enough.
SIGKILL and SIGSTOP have fast path in sigqueue_add, because they can
not be caught or masked.
The sigqueue() syscall allows user code to queue a signal to target
process, if resource is unavailable, EAGAIN will be returned as
specification said.
Just before thread exits, signal queue memory will be freed by
sigqueue_flush.
Current, all signals are allowed to be queued, not only realtime signals.
Earlier patch reviewed by: jhb, deischen
Tested on: i386, amd64
2005-10-14 12:43:47 +00:00
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void osf1_sendsig(sig_t, struct ksiginfo *, sigset_t *);
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1999-12-14 22:35:36 +00:00
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#endif /* !_OSF1_SIGNAL_H */
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