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      1 /*	$NetBSD: signal.h,v 1.33 2021/10/30 14:05:40 thorpej Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1992, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * This code is derived from software contributed to Berkeley by
      8  * Ralph Campbell.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. Neither the name of the University nor the names of its contributors
     19  *    may be used to endorse or promote products derived from this software
     20  *    without specific prior written permission.
     21  *
     22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     32  * SUCH DAMAGE.
     33  *
     34  *	@(#)signal.h	8.1 (Berkeley) 6/10/93
     35  */
     36 
     37 #ifndef	_MIPS_SIGNAL_H_
     38 #define	_MIPS_SIGNAL_H_
     39 
     40 #include <sys/featuretest.h>
     41 
     42 #include <machine/cdefs.h>	/* for API selection */
     43 
     44 #ifdef _KERNEL_OPT
     45 #include "opt_compat_netbsd.h"
     46 #include "opt_compat_ultrix.h"
     47 #endif
     48 
     49 #if !defined(__ASSEMBLER__)
     50 
     51 
     52 /*
     53  * Machine-dependent signal definitions
     54  */
     55 
     56 typedef int sig_atomic_t;
     57 
     58 /*
     59  * Information pushed on stack when a signal is delivered.
     60  * This is used by the kernel to restore state following
     61  * execution of the signal handler.  It is also made available
     62  * to the handler to allow it to restore state properly if
     63  * a non-standard exit is performed.
     64  *
     65  * sizeof(sigcontext) = 45 * sizeof(int) + 35 * sizeof(mips_reg_t)
     66  */
     67 #if defined(_KERNEL) && (defined(COMPAT_13) || defined(COMPAT_ULTRIX))
     68 struct sigcontext13 {
     69 	int	sc_onstack;	/* sigstack state to restore */
     70 	int	sc_mask;	/* signal mask to restore (old style) */
     71 	int	sc_pc;		/* pc at time of signal */
     72 	int	sc_regs[32];	/* processor regs 0 to 31 */
     73 	int	mullo, mulhi;	/* mullo and mulhi registers... */
     74 	int	sc_fpused;	/* fp has been used */
     75 	int	sc_fpregs[33];	/* fp regs 0 to 31 and csr */
     76 	int	sc_fpc_eir;	/* floating point exception instruction reg */
     77 	int	sc_xxx[8];	/* XXX reserved */
     78 };
     79 #endif /* _KERNEL && COMPAT_13 */
     80 
     81 #if defined(_KERNEL) || defined(__mips_o32)
     82 #define	__HAVE_STRUCT_SIGCONTEXT
     83 #endif
     84 
     85 #if defined(_NETBSD_SOURCE)
     86 #include <sys/sigtypes.h>
     87 /*
     88  * Only need an O32 version.
     89  */
     90 #define	_SIGCONTEXT_DEFINE(_name, _reg_t, _fp_t) \
     91 struct sigcontext { \
     92 	int	sc_onstack;	/* sigstack state to restore */ \
     93 	int	__sc_mask13;	/* signal mask to restore (old style) */ \
     94 	_reg_t	sc_pc;		/* pc at time of signal */ \
     95 	_reg_t	sc_regs[32];	/* processor regs 0 to 31 */ \
     96 	_reg_t	mullo, mulhi;	/* mullo and mulhi registers... */ \
     97 	int	sc_fpused;	/* fp has been used */ \
     98 	_fp_t	sc_fpregs[33];	/* fp regs 0 to 31 and csr */ \
     99 	int	sc_fpc_eir;	/* floating point exception instruction reg */ \
    100 	int	sc_xxx[8];	/* XXX reserved */ \
    101 	sigset_t sc_mask;	/* signal mask to restore (new style) */ \
    102 }
    103 
    104 /*
    105  * The only binaries that used sigcontext used the O32 ABI.  The kernel
    106  * needs this for 32-bit compatibility, and O32 ABI user-space needs this
    107  * natively.
    108  */
    109 #if defined(_KERNEL)
    110 _SIGCONTEXT_DEFINE(sigcontext, int, int);
    111 #elif defined(__mips_o32) || defined(_LIBC)
    112 _SIGCONTEXT_DEFINE(sigcontext, __register_t, __fpregister_t);
    113 #endif
    114 
    115 #endif /* _NETBSD_SOURCE */
    116 
    117 #endif	/* !_LANGUAGE_ASSEMBLY */
    118 #endif	/* !_MIPS_SIGNAL_H_ */
    119