/*	$NetBSD: signal.h,v 1.6 2011/01/02 18:07:02 skrll Exp $	*/

/*	$OpenBSD: signal.h,v 1.1 1998/06/23 19:45:27 mickey Exp $	*/

/* 
 * Copyright (c) 1994, The University of Utah and
 * the Computer Systems Laboratory at the University of Utah (CSL).
 * All rights reserved.
 *
 * Permission to use, copy, modify and distribute this software is hereby
 * granted provided that (1) source code retains these copyright, permission,
 * and disclaimer notices, and (2) redistributions including binaries
 * reproduce the notices in supporting documentation, and (3) all advertising
 * materials mentioning features or use of this software display the following
 * acknowledgement: ``This product includes software developed by the
 * Computer Systems Laboratory at the University of Utah.''
 *
 * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
 * IS" CONDITION.  THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
 * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 *
 * CSL requests users of this software to return to csl-dist@cs.utah.edu any
 * improvements that they make and grant CSL redistribution rights.
 *
 * 	Utah $Hdr: signal.h 1.3 94/12/16$
 */

#ifndef _HPPA_SIGNAL_H__
#define _HPPA_SIGNAL_H__

/*
 * Machine-dependent signal definitions
 */

#include <sys/featuretest.h>

typedef int sig_atomic_t;

#if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE)
#include <machine/trap.h>	/* codes for SIGILL, SIGFPE */
#endif

/*
 * Information pushed on stack when a signal is delivered.
 * This is used by the kernel to restore state following
 * execution of the signal handler.  It is also made available
 * to the handler to allow it to restore state properly if
 * a non-standard exit is performed.
 */
struct	sigcontext {
	int	sc_onstack;		/* sigstack state to restore */
	int	__sc_mask13;		/* signal mask to restore (old style) */
	int	sc_sp;			/* sp to restore */
	int	sc_fp;			/* fp to restore */
	int	sc_ap;			/* ap to restore */
	int	sc_pcsqh;		/* pc space queue (head) to restore */
	int	sc_pcoqh;		/* pc offset queue (head) to restore */
	int	sc_pcsqt;		/* pc space queue (tail) to restore */
	int	sc_pcoqt;		/* pc offset queue (tail) to restore */
	int	sc_ps;			/* psl to restore */
	sigset_t sc_mask;		/* signal mask to restore (new style) */
};

#if defined(_KERNEL)
#include <hppa/frame.h>

/*
 * Register state saved while kernel delivers a signal.
 */
struct sigstate {
	int	ss_flags;		/* which of the following are valid */
	struct trapframe ss_frame;	/* original exception frame */
};

#define	SS_FPSTATE	0x01
#define	SS_USERREGS	0x02

/*
 * Stack frame layout when delivering a signal.
 */
struct sigframe {
	struct sigcontext sf_sc;	/* actual context */
	struct sigstate sf_state;	/* state of the hardware */
	/*
	 * Everything below here must match the calling convention.
	 * Per that convention, sendsig must initialize very little;
	 * only sf_psp, sf_clup, sf_sl, and sf_edp must be set.
	 * Note that this layout matches the HPPA_FRAME_ macros
	 * in frame.h.
	 */
	u_int	sf_arg3;
	u_int	sf_arg2;
	u_int	sf_arg1;
	u_int	sf_arg0;
	u_int	sf_edp;
	u_int	sf_esr4;
	u_int	sf_erp;
	u_int	sf_crp;
	u_int	sf_sl;
	u_int	sf_clup;
	u_int	sf_ep;
	u_int	sf_psp;
};

#endif /* _KERNEL */

#endif /* _HPPA_SIGNAL_H__ */