1/* $NetBSD: mcontext.h,v 1.27 2024/11/30 01:04:07 christos Exp $ */
2
3/*-
4 * Copyright (c) 2001, 2002 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 and by Jason R. Thorpe of Wasabi Systems, Inc.
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 _ARM_MCONTEXT_H_
33#define _ARM_MCONTEXT_H_
34
35#include <sys/stdint.h>
36
37/*
38 * General register state
39 */
40#if defined(__aarch64__)
41#define _NGREG 35 /* GR0-30, SP, PC, SPSR, TPIDR */
42#define _NGREG32 17
43typedef __uint64_t __greg_t;
44typedef unsigned int __greg32_t;
45
46typedef __greg32_t __gregset32_t[_NGREG32];
47#elif defined(__arm__)
48#define _NGREG 17
49typedef unsigned int __greg_t;
50#endif
51
52typedef __greg_t __gregset_t[_NGREG];
53
54#define _REG_R0 0
55#define _REG_R1 1
56#define _REG_R2 2
57#define _REG_R3 3
58#define _REG_R4 4
59#define _REG_R5 5
60#define _REG_R6 6
61#define _REG_R7 7
62#define _REG_R8 8
63#define _REG_R9 9
64#define _REG_R10 10
65#define _REG_R11 11
66#define _REG_R12 12
67#define _REG_R13 13
68#define _REG_R14 14
69#define _REG_R15 15
70#define _REG_CPSR 16
71
72#define _REG_X0 0
73#define _REG_X1 1
74#define _REG_X2 2
75#define _REG_X3 3
76#define _REG_X4 4
77#define _REG_X5 5
78#define _REG_X6 6
79#define _REG_X7 7
80#define _REG_X8 8
81#define _REG_X9 9
82#define _REG_X10 10
83#define _REG_X11 11
84#define _REG_X12 12
85#define _REG_X13 13
86#define _REG_X14 14
87#define _REG_X15 15
88#define _REG_X16 16
89#define _REG_X17 17
90#define _REG_X18 18
91#define _REG_X19 19
92#define _REG_X20 20
93#define _REG_X21 21
94#define _REG_X22 22
95#define _REG_X23 23
96#define _REG_X24 24
97#define _REG_X25 25
98#define _REG_X26 26
99#define _REG_X27 27
100#define _REG_X28 28
101#define _REG_X29 29
102#define _REG_X30 30
103#define _REG_X31 31
104#define _REG_ELR 32
105#define _REG_SPSR 33
106#define _REG_TPIDR 34
107
108/* Convenience synonyms */
109
110#if defined(__aarch64__)
111#define _REG_RV _REG_X0
112#define _REG_FP _REG_X29
113#define _REG_LR _REG_X30
114#define _REG_SP _REG_X31
115#define _REG_PC _REG_ELR
116#elif defined(__arm__)
117#define _REG_RV _REG_R0
118#define _REG_FP _REG_R11
119#define _REG_SP _REG_R13
120#define _REG_LR _REG_R14
121#define _REG_PC _REG_R15
122#endif
123
124/*
125 * Floating point register state
126 */
127#if defined(__aarch64__)
128
129#define _NFREG 32 /* Number of SIMD registers */
130
131typedef struct {
132 union __freg {
133 __uint8_t __b8[16];
134 __uint16_t __h16[8];
135 __uint32_t __s32[4];
136 __uint64_t __d64[2];
137 __uint128_t __q128[1];
138 } __qregs[_NFREG] __aligned(16);
139 __uint32_t __fpcr; /* FPCR */
140 __uint32_t __fpsr; /* FPSR */
141} __fregset_t;
142
143/* Compat structures */
144typedef struct {
145#if 1 /* __ARM_EABI__ is default on aarch64 */
146 unsigned int __vfp_fpscr;
147 uint64_t __vfp_fstmx[32];
148 unsigned int __vfp_fpsid;
149#else
150 unsigned int __vfp_fpscr;
151 unsigned int __vfp_fstmx[33];
152 unsigned int __vfp_fpsid;
153#endif
154} __vfpregset32_t;
155
156typedef struct {
157 __gregset32_t __gregs;
158 __vfpregset32_t __vfpregs;
159 __greg32_t _mc_tlsbase;
160 __greg32_t _mc_user_tpid;
161} mcontext32_t;
162
163typedef struct {
164 __gregset_t __gregs; /* General Purpose Register set */
165 __fregset_t __fregs; /* FPU/SIMD Register File */
166 __greg_t __spare[8]; /* future proof */
167} mcontext_t;
168
169#elif defined(__arm__)
170/* Note: the storage layout of this structure must be identical to ARMFPE! */
171typedef struct {
172 unsigned int __fp_fpsr;
173 struct {
174 unsigned int __fp_exponent;
175 unsigned int __fp_mantissa_hi;
176 unsigned int __fp_mantissa_lo;
177 } __fp_fr[8];
178} __fpregset_t;
179
180typedef struct {
181#ifdef __ARM_EABI__
182 unsigned int __vfp_fpscr;
183 uint64_t __vfp_fstmx[32];
184 unsigned int __vfp_fpsid;
185#else
186 unsigned int __vfp_fpscr;
187 unsigned int __vfp_fstmx[33];
188 unsigned int __vfp_fpsid;
189#endif
190} __vfpregset_t;
191
192typedef struct {
193 __gregset_t __gregs;
194 union {
195 __fpregset_t __fpregs;
196 __vfpregset_t __vfpregs;
197 } __fpu;
198 __greg_t _mc_tlsbase;
199 __greg_t _mc_user_tpid;
200} mcontext_t, mcontext32_t;
201
202
203#define _UC_MACHINE_PAD 1 /* Padding appended to ucontext_t */
204
205#ifdef __ARM_EABI__
206#define __UCONTEXT_SIZE (256 + 144)
207#else
208#define __UCONTEXT_SIZE 256
209#endif
210
211#endif
212
213/* Machine-dependent uc_flags */
214#define _UC_TLSBASE _UC_MD_BIT19 /* see <sys/ucontext.h> */
215
216/* Machine-dependent uc_flags for arm */
217#define _UC_ARM_VFP _UC_MD_BIT16 /* FPU field is VFP */
218
219/* used by signal delivery to indicate status of signal stack */
220#define _UC_SETSTACK _UC_MD_BIT17
221#define _UC_CLRSTACK _UC_MD_BIT18
222
223#define _UC_MACHINE_SP(uc) ((uc)->uc_mcontext.__gregs[_REG_SP])
224#define _UC_MACHINE_FP(uc) ((uc)->uc_mcontext.__gregs[_REG_FP])
225#define _UC_MACHINE_PC(uc) ((uc)->uc_mcontext.__gregs[_REG_PC])
226#define _UC_MACHINE_INTRV(uc) ((uc)->uc_mcontext.__gregs[_REG_RV])
227
228#define _UC_MACHINE_SET_PC(uc, pc) \
229 _UC_MACHINE_PC(uc) = (pc)
230
231#if defined(_KERNEL)
232__BEGIN_DECLS
233void vfp_getcontext(struct lwp *, mcontext_t *, int *);
234void vfp_setcontext(struct lwp *, const mcontext_t *);
235__END_DECLS
236#endif
237
238#endif /* !_ARM_MCONTEXT_H_ */