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
49typedef int __greg_t;
50typedef __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
71typedef struct {
72 int __fp_pcr;
73 int __fp_psr;
74 int __fp_piaddr;
75 int __fp_fpregs[8*3];
76} __fpregset_t;
77
78typedef 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_ */