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      1 /*	$NetBSD: mcontext.h,v 1.16 2024/11/30 01:04:11 christos Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2001 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Klaus Klein.
      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  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifndef _M68K_MCONTEXT_H_
     33 #define _M68K_MCONTEXT_H_
     34 
     35 #ifdef _KERNEL
     36 #include <m68k/cpuframe.h>
     37 #endif
     38 
     39 /*
     40  * mcontext extensions to handle signal delivery.
     41  */
     42 #define	_UC_SETSTACK	_UC_MD_BIT16
     43 #define	_UC_CLRSTACK	_UC_MD_BIT17
     44 
     45 /*
     46  * General register state
     47  */
     48 #define	_NGREG		18
     49 typedef int		__greg_t;
     50 typedef	__greg_t	__gregset_t[_NGREG];
     51 
     52 #define	_REG_D0	0
     53 #define	_REG_D1	1
     54 #define	_REG_D2	2
     55 #define	_REG_D3	3
     56 #define	_REG_D4	4
     57 #define	_REG_D5	5
     58 #define	_REG_D6	6
     59 #define	_REG_D7	7
     60 #define	_REG_A0	8
     61 #define	_REG_A1	9
     62 #define	_REG_A2	10
     63 #define	_REG_A3	11
     64 #define	_REG_A4	12
     65 #define	_REG_A5	13
     66 #define	_REG_A6	14
     67 #define	_REG_A7	15
     68 #define	_REG_PC	16
     69 #define	_REG_PS	17
     70 
     71 typedef struct {
     72 	int	__fp_pcr;
     73 	int	__fp_psr;
     74 	int	__fp_piaddr;
     75 	int	__fp_fpregs[8*3];
     76 } __fpregset_t;
     77 
     78 typedef struct {
     79 	__gregset_t	__gregs;	/* General Register set */
     80 	__fpregset_t	__fpregs;	/* Floating Point Register set */
     81 	union {
     82 		long	__mc_state[201];	/* Only need 308 bytes... */
     83 #if defined(_KERNEL) || defined(__M68K_MCONTEXT_PRIVATE)
     84 		struct {
     85 			/* Rest of the frame. */
     86 			unsigned int	__mcf_format;
     87 			unsigned int	__mcf_vector;
     88 			union F_u	__mcf_exframe;
     89 			/* Rest of the FPU frame. */
     90 			union FPF_u1	__mcf_fpf_u1;
     91 			union FPF_u2	__mcf_fpf_u2;
     92 		} __mc_frame;
     93 #endif /* _KERNEL || __M68K_MCONTEXT_PRIVATE */
     94 	}		__mc_pad;
     95 	__greg_t	_mc_tlsbase;
     96 } mcontext_t;
     97 
     98 /* Note: no additional padding is to be performed in ucontext_t. */
     99 
    100 /* Machine-specific uc_flags value */
    101 #define	_UC_M68K_UC_USER _UC_MD_BIT30
    102 #define	_UC_TLSBASE	_UC_MD_BIT19
    103 
    104 #define _UC_MACHINE_SP(uc)	((uc)->uc_mcontext.__gregs[_REG_A7])
    105 #define _UC_MACHINE_FP(uc)	((uc)->uc_mcontext.__gregs[_REG_A6])
    106 #define _UC_MACHINE_PC(uc)	((uc)->uc_mcontext.__gregs[_REG_PC])
    107 #define _UC_MACHINE_INTRV(uc)	((uc)->uc_mcontext.__gregs[_REG_D0])
    108 
    109 #define	_UC_MACHINE_SET_PC(uc, pc)	_UC_MACHINE_PC(uc) = (pc)
    110 
    111 #define	__UCONTEXT_SIZE	1024
    112 
    113 #endif	/* !_M68K_MCONTEXT_H_ */
    114