freebsd-skq/sys/alpha/osf1/osf1_signal.h
David Xu 9104847f21 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

68 lines
1.6 KiB
C

/* $FreeBSD$ */
#ifndef _OSF1_SIGNAL_H
#define _OSF1_SIGNAL_H
#define OSF1_NSIG 64
#define OSF1_SIG_DFL 0
#define OSF1_SIG_ERR -1
#define OSF1_SIG_IGN 1
#define OSF1_SIG_HOLD 2
#define OSF1_SIGNO(a) ((a) & OSF1_SIGNO_MASK)
#define OSF1_SIGCALL(a) ((a) & ~OSF1_SIGNO_MASK)
#define OSF1_SIG_BLOCK 1
#define OSF1_SIG_UNBLOCK 2
#define OSF1_SIG_SETMASK 3
typedef u_long osf1_sigset_t;
typedef void (*osf1_handler_t)(int);
struct osf1_sigaction {
osf1_handler_t osa_handler;
osf1_sigset_t osa_mask;
int osa_flags;
};
struct osf1_sigaltstack {
caddr_t ss_sp;
int ss_flags;
size_t ss_size;
};
/* sa_flags */
#define OSF1_SA_ONSTACK 0x00000001
#define OSF1_SA_RESTART 0x00000002
#define OSF1_SA_NOCLDSTOP 0x00000004
#define OSF1_SA_NODEFER 0x00000008
#define OSF1_SA_RESETHAND 0x00000010
#define OSF1_SA_NOCLDWAIT 0x00000020
#define OSF1_SA_SIGINFO 0x00000040
/* ss_flags */
#define OSF1_SS_ONSTACK 0x00000001
#define OSF1_SS_DISABLE 0x00000002
#define OSF1_SIGNO_MASK 0x00FF
#define OSF1_SIGNAL_MASK 0x0000
#define OSF1_SIGDEFER_MASK 0x0100
#define OSF1_SIGHOLD_MASK 0x0200
#define OSF1_SIGRELSE_MASK 0x0400
#define OSF1_SIGIGNORE_MASK 0x0800
#define OSF1_SIGPAUSE_MASK 0x1000
extern int osf1_to_linux_sig[];
void bsd_to_osf1_sigaltstack(const struct sigaltstack *, struct osf1_sigaltstack *);
void bsd_to_osf1_sigset(const sigset_t *, osf1_sigset_t *);
void osf1_to_bsd_sigaltstack(const struct osf1_sigaltstack *, struct sigaltstack *);
void osf1_to_bsd_sigset(const osf1_sigset_t *, sigset_t *);
void osf1_sendsig(sig_t, struct ksiginfo *, sigset_t *);
#endif /* !_OSF1_SIGNAL_H */