signal.h

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#ifndef _ASMAXP_SIGNAL_H
#define _ASMAXP_SIGNAL_H

#include <linux/types.h>

/* Avoid too many header ordering problems.  */
struct siginfo;

#ifdef __KERNEL__
/* Digital Unix defines 64 signals.  Most things should be clean enough
   to redefine this at will, if care is taken to make libc match.  */

#define _NSIG       64
#define _NSIG_BPW   64
#define _NSIG_WORDS (_NSIG / _NSIG_BPW)

typedef unsigned long old_sigset_t;     /* at least 32 bits */

typedef struct {
    unsigned long sig[_NSIG_WORDS];
} sigset_t;

#else
/* Here we must cater to libcs that poke about in kernel headers.  */

#define NSIG        32
typedef unsigned long sigset_t;

#endif /* __KERNEL__ */


/*
 * Linux/AXP has different signal numbers that Linux/i386: I'm trying
 * to make it OSF/1 binary compatible, at least for normal binaries.
 */
#define SIGHUP       1
#define SIGINT       2
#define SIGQUIT      3
#define SIGILL       4
#define SIGTRAP      5
#define SIGABRT      6
#define SIGEMT       7
#define SIGFPE       8
#define SIGKILL      9
#define SIGBUS      10
#define SIGSEGV     11
#define SIGSYS      12
#define SIGPIPE     13
#define SIGALRM     14
#define SIGTERM     15
#define SIGURG      16
#define SIGSTOP     17
#define SIGTSTP     18
#define SIGCONT     19
#define SIGCHLD     20
#define SIGTTIN     21
#define SIGTTOU     22
#define SIGIO       23
#define SIGXCPU     24
#define SIGXFSZ     25
#define SIGVTALRM   26
#define SIGPROF     27
#define SIGWINCH    28
#define SIGINFO     29
#define SIGUSR1     30
#define SIGUSR2     31

#define SIGPOLL SIGIO
#define SIGPWR  SIGINFO
#define SIGIOT  SIGABRT

/* These should not be considered constants from userland.  */
#define SIGRTMIN    32
#define SIGRTMAX    _NSIG

/*
 * SA_FLAGS values:
 *
 * SA_ONSTACK indicates that a registered stack_t will be used.
 * SA_RESTART flag to get restarting signals (which were the default long ago)
 * SA_NOCLDSTOP flag to turn off SIGCHLD when children stop.
 * SA_RESETHAND clears the handler when the signal is delivered.
 * SA_NOCLDWAIT flag on SIGCHLD to inhibit zombies.
 * SA_NODEFER prevents the current signal from being masked in the handler.
 *
 * SA_ONESHOT and SA_NOMASK are the historical Linux names for the Single
 * Unix names RESETHAND and NODEFER respectively.
 */

#define SA_ONSTACK  0x00000001
#define SA_RESTART  0x00000002
#define SA_NOCLDSTOP    0x00000004
#define SA_NODEFER  0x00000008
#define SA_RESETHAND    0x00000010
#define SA_NOCLDWAIT    0x00000020
#define SA_SIGINFO  0x00000040

#define SA_ONESHOT  SA_RESETHAND
#define SA_NOMASK   SA_NODEFER

/* 
 * sigaltstack controls
 */
#define SS_ONSTACK  1
#define SS_DISABLE  2

#define MINSIGSTKSZ 4096
#define SIGSTKSZ    16384

#define SIG_BLOCK          1    /* for blocking signals */
#define SIG_UNBLOCK        2    /* for unblocking signals */
#define SIG_SETMASK        3    /* for setting the signal mask */

#include <asm-generic/signal-defs.h>

#ifdef __KERNEL__
struct osf_sigaction {
    __sighandler_t  sa_handler;
    old_sigset_t    sa_mask;
    int     sa_flags;
};

struct sigaction {
    __sighandler_t  sa_handler;
    unsigned long   sa_flags;
    sigset_t    sa_mask;    /* mask last for extensibility */
};

struct k_sigaction {
    struct sigaction sa;
    __sigrestore_t ka_restorer;
};
#else
/* Here we must cater to libcs that poke about in kernel headers.  */

struct sigaction {
    union {
      __sighandler_t    _sa_handler;
      void (*_sa_sigaction)(int, struct siginfo *, void *);
    } _u;
    sigset_t    sa_mask;
    int     sa_flags;
};

#define sa_handler  _u._sa_handler
#define sa_sigaction    _u._sa_sigaction

#endif /* __KERNEL__ */

typedef struct sigaltstack {
    void __user *ss_sp;
    int ss_flags;
    size_t ss_size;
} stack_t;

/* sigstack(2) is deprecated, and will be withdrawn in a future version
   of the X/Open CAE Specification.  Use sigaltstack instead.  It is only
   implemented here for OSF/1 compatibility.  */

struct sigstack {
    void __user *ss_sp;
    int ss_onstack;
};

#ifdef __KERNEL__
#include <asm/sigcontext.h>

#define ptrace_signal_deliver(regs, cookie) do { } while (0)

#endif

#endif