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| 1 | /* Copyright (C) 1997-2022 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/i386 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/sigset_t.h> |
| 26 | #include <bits/types/stack_t.h> |
| 27 | |
| 28 | |
| 29 | /* Type for general register. */ |
| 30 | typedef int greg_t; |
| 31 | |
| 32 | /* Number of general registers. */ |
| 33 | #define __NGREG 19 |
| 34 | #ifdef __USE_MISC |
| 35 | # define NGREG __NGREG |
| 36 | #endif |
| 37 | |
| 38 | /* Container for all general registers. */ |
| 39 | typedef greg_t gregset_t[__NGREG]; |
| 40 | |
| 41 | #ifdef __USE_MISC |
| 42 | /* Number of each register is the `gregset_t' array. */ |
| 43 | enum |
| 44 | { |
| 45 | REG_GS = 0, |
| 46 | # define REG_GS REG_GS |
| 47 | REG_FS, |
| 48 | # define REG_FS REG_FS |
| 49 | REG_ES, |
| 50 | # define REG_ES REG_ES |
| 51 | REG_DS, |
| 52 | # define REG_DS REG_DS |
| 53 | REG_EDI, |
| 54 | # define REG_EDI REG_EDI |
| 55 | REG_ESI, |
| 56 | # define REG_ESI REG_ESI |
| 57 | REG_EBP, |
| 58 | # define REG_EBP REG_EBP |
| 59 | REG_ESP, |
| 60 | # define REG_ESP REG_ESP |
| 61 | REG_EBX, |
| 62 | # define REG_EBX REG_EBX |
| 63 | REG_EDX, |
| 64 | # define REG_EDX REG_EDX |
| 65 | REG_ECX, |
| 66 | # define REG_ECX REG_ECX |
| 67 | REG_EAX, |
| 68 | # define REG_EAX REG_EAX |
| 69 | REG_TRAPNO, |
| 70 | # define REG_TRAPNO REG_TRAPNO |
| 71 | REG_ERR, |
| 72 | # define REG_ERR REG_ERR |
| 73 | REG_EIP, |
| 74 | # define REG_EIP REG_EIP |
| 75 | REG_CS, |
| 76 | # define REG_CS REG_CS |
| 77 | REG_EFL, |
| 78 | # define REG_EFL REG_EFL |
| 79 | REG_UESP, |
| 80 | # define REG_UESP REG_UESP |
| 81 | REG_SS |
| 82 | # define REG_SS REG_SS |
| 83 | }; |
| 84 | #endif |
| 85 | |
| 86 | #ifdef __USE_MISC |
| 87 | # define __ctx(fld) fld |
| 88 | # define __ctxt(tag) tag |
| 89 | #else |
| 90 | # define __ctx(fld) __ ## fld |
| 91 | # define __ctxt(tag) /* Empty. */ |
| 92 | #endif |
| 93 | |
| 94 | /* Structure to describe FPU registers. */ |
| 95 | typedef struct |
| 96 | { |
| 97 | union |
| 98 | { |
| 99 | struct __ctxt(fpchip_state) |
| 100 | { |
| 101 | int __ctx(state)[27]; |
| 102 | int __ctx(status); |
| 103 | } __ctx(fpchip_state); |
| 104 | |
| 105 | struct __ctxt(fp_emul_space) |
| 106 | { |
| 107 | char __ctx(fp_emul)[246]; |
| 108 | char __ctx(fp_epad)[2]; |
| 109 | } __ctx(fp_emul_space); |
| 110 | |
| 111 | int __ctx(f_fpregs)[62]; |
| 112 | } __ctx(fp_reg_set); |
| 113 | |
| 114 | long int __ctx(f_wregs)[33]; |
| 115 | } fpregset_t; |
| 116 | |
| 117 | /* Context to describe whole processor state. */ |
| 118 | typedef struct |
| 119 | { |
| 120 | gregset_t __ctx(gregs); |
| 121 | fpregset_t __ctx(fpregs); |
| 122 | } mcontext_t; |
| 123 | |
| 124 | /* Userlevel context. */ |
| 125 | typedef struct ucontext_t |
| 126 | { |
| 127 | unsigned long int __ctx(uc_flags); |
| 128 | struct ucontext_t *uc_link; |
| 129 | sigset_t uc_sigmask; |
| 130 | stack_t uc_stack; |
| 131 | mcontext_t uc_mcontext; |
| 132 | long int __glibc_reserved1[5]; |
| 133 | } ucontext_t; |
| 134 | |
| 135 | #undef __ctx |
| 136 | #undef __ctxt |
| 137 | |
| 138 | #endif /* sys/ucontext.h */ |
| 139 |
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