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| 1 | /* Copyright (C) 1998-2024 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/ARM 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 | typedef int greg_t; |
| 30 | |
| 31 | /* Number of general registers. */ |
| 32 | #define __NGREG 16 |
| 33 | #ifdef __USE_MISC |
| 34 | # define NGREG __NGREG |
| 35 | #endif |
| 36 | |
| 37 | /* Container for all general registers. */ |
| 38 | typedef greg_t gregset_t[__NGREG]; |
| 39 | |
| 40 | #ifdef __USE_MISC |
| 41 | /* Number of each register is the `gregset_t' array. */ |
| 42 | enum |
| 43 | { |
| 44 | R0 = 0, |
| 45 | # define R0 R0 |
| 46 | R1 = 1, |
| 47 | # define R1 R1 |
| 48 | R2 = 2, |
| 49 | # define R2 R2 |
| 50 | R3 = 3, |
| 51 | # define R3 R3 |
| 52 | R4 = 4, |
| 53 | # define R4 R4 |
| 54 | R5 = 5, |
| 55 | # define R5 R5 |
| 56 | R6 = 6, |
| 57 | # define R6 R6 |
| 58 | R7 = 7, |
| 59 | # define R7 R7 |
| 60 | R8 = 8, |
| 61 | # define R8 R8 |
| 62 | R9 = 9, |
| 63 | # define R9 R9 |
| 64 | R10 = 10, |
| 65 | # define R10 R10 |
| 66 | R11 = 11, |
| 67 | # define R11 R11 |
| 68 | R12 = 12, |
| 69 | # define R12 R12 |
| 70 | R13 = 13, |
| 71 | # define R13 R13 |
| 72 | R14 = 14, |
| 73 | # define R14 R14 |
| 74 | R15 = 15, |
| 75 | # define R15 R15 |
| 76 | }; |
| 77 | #endif |
| 78 | |
| 79 | #ifdef __USE_MISC |
| 80 | # define __ctx(fld) fld |
| 81 | #else |
| 82 | # define __ctx(fld) __ ## fld |
| 83 | #endif |
| 84 | |
| 85 | /* Structure to describe FPU registers. */ |
| 86 | typedef struct |
| 87 | { |
| 88 | } fpregset_t; |
| 89 | |
| 90 | /* Context to describe whole processor state. */ |
| 91 | typedef struct |
| 92 | { |
| 93 | gregset_t __ctx(gregs); |
| 94 | fpregset_t __ctx(fpregs); |
| 95 | } mcontext_t; |
| 96 | |
| 97 | /* Userlevel context. */ |
| 98 | typedef struct ucontext_t |
| 99 | { |
| 100 | unsigned long int __ctx(uc_flags); |
| 101 | struct ucontext_t *uc_link; |
| 102 | sigset_t uc_sigmask; |
| 103 | stack_t uc_stack; |
| 104 | mcontext_t uc_mcontext; |
| 105 | long int __glibc_reserved1[5]; |
| 106 | } ucontext_t; |
| 107 | |
| 108 | #undef __ctx |
| 109 | |
| 110 | #endif /* sys/ucontext.h */ |
| 111 |
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