signal.h

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/*
 * include/asm-xtensa/signal.h
 *
 * Swiped from SH.
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 2001 - 2005 Tensilica Inc.
 */

#ifndef _UAPI_XTENSA_SIGNAL_H
#define _UAPI_XTENSA_SIGNAL_H


#define _NSIG       64
#define _NSIG_BPW   32
#define _NSIG_WORDS (_NSIG / _NSIG_BPW)

#ifndef __ASSEMBLY__

#include <linux/types.h>

/* Avoid too many header ordering problems.  */
struct siginfo;
typedef unsigned long old_sigset_t;     /* at least 32 bits */
typedef struct {
    unsigned long sig[_NSIG_WORDS];
} sigset_t;

#endif

#define SIGHUP       1
#define SIGINT       2
#define SIGQUIT      3
#define SIGILL       4
#define SIGTRAP      5
#define SIGABRT      6
#define SIGIOT       6
#define SIGBUS       7
#define SIGFPE       8
#define SIGKILL      9
#define SIGUSR1     10
#define SIGSEGV     11
#define SIGUSR2     12
#define SIGPIPE     13
#define SIGALRM     14
#define SIGTERM     15
#define SIGSTKFLT   16
#define SIGCHLD     17
#define SIGCONT     18
#define SIGSTOP     19
#define SIGTSTP     20
#define SIGTTIN     21
#define SIGTTOU     22
#define SIGURG      23
#define SIGXCPU     24
#define SIGXFSZ     25
#define SIGVTALRM   26
#define SIGPROF     27
#define SIGWINCH    28
#define SIGIO       29
#define SIGPOLL     SIGIO
/* #define SIGLOST      29 */
#define SIGPWR      30
#define SIGSYS      31
#define SIGUNUSED   31

/* These should not be considered constants from userland.  */
#define SIGRTMIN    32
#define SIGRTMAX    (_NSIG-1)

/*
 * 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_NOCLDSTOP    0x00000001
#define SA_NOCLDWAIT    0x00000002 /* not supported yet */
#define SA_SIGINFO  0x00000004
#define SA_ONSTACK  0x08000000
#define SA_RESTART  0x10000000
#define SA_NODEFER  0x40000000
#define SA_RESETHAND    0x80000000

#define SA_NOMASK   SA_NODEFER
#define SA_ONESHOT  SA_RESETHAND

#define SA_RESTORER 0x04000000

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

#define MINSIGSTKSZ 2048
#define SIGSTKSZ    8192

#ifndef __ASSEMBLY__

#define SIG_BLOCK          0    /* for blocking signals */
#define SIG_UNBLOCK        1    /* for unblocking signals */
#define SIG_SETMASK        2    /* for setting the signal mask */

/* Type of a signal handler.  */
typedef void (*__sighandler_t)(int);

#define SIG_DFL ((__sighandler_t)0) /* default signal handling */
#define SIG_IGN ((__sighandler_t)1) /* ignore signal */
#define SIG_ERR ((__sighandler_t)-1)    /* error return from signal */

#ifndef __KERNEL__

/* 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;
    unsigned long sa_flags;
    void (*sa_restorer)(void);
};

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

#endif /* __KERNEL__ */

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

#endif  /* __ASSEMBLY__ */
#endif /* _UAPI_XTENSA_SIGNAL_H */