1 /* Copyright (C) 1998-2023 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library. If not, see
16 <https://www.gnu.org/licenses/>. */
17
18 /* System V/mips ABI compliant context switching support. */
19
20 #ifndef _SYS_UCONTEXT_H
21 #define _SYS_UCONTEXT_H 1
22
23 #include <features.h>
24
25 #include <bits/types.h>
26 #include <bits/types/sigset_t.h>
27 #include <bits/types/stack_t.h>
28
29 #include <sgidefs.h>
30
31
32 /* Type for general register. */
33 #if _MIPS_SIM == _ABIO32
34 typedef __uint32_t greg_t;
35 #else
36 typedef __uint64_t greg_t;
37 #endif
38
39 /* Number of general registers. */
40 #define __NGREG 36
41 #ifdef __USE_MISC
42 # define NGREG __NGREG
43 #endif
44
45 /* Container for all general registers. */
46 typedef greg_t gregset_t[__NGREG];
47
48 #ifdef __USE_MISC
49 /* Number of each register is the `gregset_t' array. */
50 enum
51 {
52 CTX_R0 = 0,
53 # define CTX_R0 CTX_R0
54 CTX_AT = 1,
55 # define CTX_AT CTX_AT
56 CTX_V0 = 2,
57 # define CTX_V0 CTX_V0
58 CTX_V1 = 3,
59 # define CTX_V1 CTX_V1
60 CTX_A0 = 4,
61 # define CTX_A0 CTX_A0
62 CTX_A1 = 5,
63 # define CTX_A1 CTX_A1
64 CTX_A2 = 6,
65 # define CTX_A2 CTX_A2
66 CTX_A3 = 7,
67 # define CTX_A3 CTX_A3
68 CTX_T0 = 8,
69 # define CTX_T0 CTX_T0
70 CTX_T1 = 9,
71 # define CTX_T1 CTX_T1
72 CTX_T2 = 10,
73 # define CTX_T2 CTX_T2
74 CTX_T3 = 11,
75 # define CTX_T3 CTX_T3
76 CTX_T4 = 12,
77 # define CTX_T4 CTX_T4
78 CTX_T5 = 13,
79 # define CTX_T5 CTX_T5
80 CTX_T6 = 14,
81 # define CTX_T6 CTX_T6
82 CTX_T7 = 15,
83 # define CTX_T7 CTX_T7
84 CTX_S0 = 16,
85 # define CTX_S0 CTX_S0
86 CTX_S1 = 17,
87 # define CTX_S1 CTX_S1
88 CTX_S2 = 18,
89 # define CTX_S2 CTX_S2
90 CTX_S3 = 19,
91 # define CTX_S3 CTX_S3
92 CTX_S4 = 20,
93 # define CTX_S4 CTX_S4
94 CTX_S5 = 21,
95 # define CTX_S5 CTX_S5
96 CTX_S6 = 22,
97 # define CTX_S6 CTX_S6
98 CTX_S7 = 23,
99 # define CTX_S7 CTX_S7
100 CTX_T8 = 24,
101 # define CTX_T8 CTX_T8
102 CTX_T9 = 25,
103 # define CTX_T9 CTX_T9
104 CTX_K0 = 26,
105 # define CTX_K0 CTX_K0
106 CTX_K1 = 27,
107 # define CTX_K1 CTX_K1
108 CTX_GP = 28,
109 # define CTX_GP CTX_GP
110 CTX_SP = 29,
111 # define CTX_SP CTX_SP
112 CTX_S8 = 30,
113 # define CTX_S8 CTX_S8
114 CTX_RA = 31,
115 # define CTX_RA CTX_RA
116 CTX_MDLO = 32,
117 # define CTX_MDLO CTX_MDLO
118 CTX_MDHI = 33,
119 # define CTX_MDHI CTX_MDHI
120 CTX_CAUSE = 34,
121 # define CTX_CAUSE CTX_CAUSE
122 CTX_EPC = 35,
123 # define CTX_EPC CTX_EPC
124 };
125 #endif
126
127 #ifdef __USE_MISC
128 # define __ctx(fld) fld
129 #else
130 # define __ctx(fld) __ ## fld
131 #endif
132
133 /* Structure to describe FPU registers. */
134 typedef struct
135 {
136 union
137 {
138 #if _MIPS_SIM == _ABIO32
139 double __ctx(fp_dregs)[16];
140 float __ctx(fp_fregs)[32];
141 unsigned int __ctx(fp_regs)[32];
142 #else
143 double __ctx(fp_dregs)[32];
144 /* float __ctx(fp_fregs)[32]; */
145 __uint64_t __ctx(fp_regs)[32];
146 #endif
147 } __ctx(fp_r);
148 unsigned int __ctx(fp_csr);
149 unsigned int __ctx(fp_pad);
150 } fpregset_t;
151
152 /* Context to describe whole processor state. */
153 typedef struct
154 {
155 gregset_t __ctx(gpregs);
156 fpregset_t __ctx(fpregs);
157 } mcontext_t;
158
159 /* Userlevel context. */
160 typedef struct ucontext_t
161 {
162 #if _MIPS_SIM == _ABIO32
163 unsigned long int __ctx(uc_flags);
164 #else
165 __uint64_t __ctx(uc_flags);
166 #endif
167 struct ucontext_t *uc_link;
168 sigset_t uc_sigmask;
169 stack_t uc_stack;
170 mcontext_t uc_mcontext;
171 int __glibc_reserved1[48];
172 } ucontext_t;
173
174 #undef __ctx
175
176 #endif /* sys/ucontext.h */