1 /* Copyright (C) 1998-2021 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 */ 177