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| 1 | /* Copyright (C) 1997-2024 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/m68k 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 18 |
| 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 | R_D0 = 0, |
| 46 | # define R_D0 R_D0 |
| 47 | R_D1 = 1, |
| 48 | # define R_D1 R_D1 |
| 49 | R_D2 = 2, |
| 50 | # define R_D2 R_D2 |
| 51 | R_D3 = 3, |
| 52 | # define R_D3 R_D3 |
| 53 | R_D4 = 4, |
| 54 | # define R_D4 R_D4 |
| 55 | R_D5 = 5, |
| 56 | # define R_D5 R_D5 |
| 57 | R_D6 = 6, |
| 58 | # define R_D6 R_D6 |
| 59 | R_D7 = 7, |
| 60 | # define R_D7 R_D7 |
| 61 | R_A0 = 8, |
| 62 | # define R_A0 R_A0 |
| 63 | R_A1 = 9, |
| 64 | # define R_A1 R_A1 |
| 65 | R_A2 = 10, |
| 66 | # define R_A2 R_A2 |
| 67 | R_A3 = 11, |
| 68 | # define R_A3 R_A3 |
| 69 | R_A4 = 12, |
| 70 | # define R_A4 R_A4 |
| 71 | R_A5 = 13, |
| 72 | # define R_A5 R_A5 |
| 73 | R_A6 = 14, |
| 74 | # define R_A6 R_A6 |
| 75 | R_A7 = 15, |
| 76 | # define R_A7 R_A7 |
| 77 | R_SP = 15, |
| 78 | # define R_SP R_SP |
| 79 | R_PC = 16, |
| 80 | # define R_PC R_PC |
| 81 | R_PS = 17 |
| 82 | # define R_PS R_PS |
| 83 | }; |
| 84 | #endif |
| 85 | |
| 86 | #ifdef __USE_MISC |
| 87 | # define __ctx(fld) fld |
| 88 | #else |
| 89 | # define __ctx(fld) __ ## fld |
| 90 | #endif |
| 91 | |
| 92 | /* Structure to describe FPU registers. */ |
| 93 | typedef struct |
| 94 | { |
| 95 | int __ctx(f_pcr); |
| 96 | int __ctx(f_psr); |
| 97 | int __ctx(f_fpiaddr); |
| 98 | #ifdef __mcoldfire__ |
| 99 | int __ctx(f_fpregs)[8][2]; |
| 100 | #else |
| 101 | int __ctx(f_fpregs)[8][3]; |
| 102 | #endif |
| 103 | } fpregset_t; |
| 104 | |
| 105 | /* Context to describe whole processor state. */ |
| 106 | typedef struct |
| 107 | { |
| 108 | int __ctx(version); |
| 109 | gregset_t __ctx(gregs); |
| 110 | fpregset_t __ctx(fpregs); |
| 111 | } mcontext_t; |
| 112 | |
| 113 | #ifdef __USE_MISC |
| 114 | # define MCONTEXT_VERSION 2 |
| 115 | #endif |
| 116 | |
| 117 | /* Userlevel context. */ |
| 118 | typedef struct ucontext_t |
| 119 | { |
| 120 | unsigned long __ctx(uc_flags); |
| 121 | struct ucontext_t *uc_link; |
| 122 | stack_t uc_stack; |
| 123 | mcontext_t uc_mcontext; |
| 124 | unsigned long __glibc_reserved1[80]; |
| 125 | sigset_t uc_sigmask; |
| 126 | } ucontext_t; |
| 127 | |
| 128 | #undef __ctx |
| 129 | |
| 130 | #endif /* sys/ucontext.h */ |
| 131 |
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