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| 1 | /* Copyright (C) 1998-2022 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/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 | #ifdef __USE_MISC |
| 30 | # define __ctx(fld) fld |
| 31 | #else |
| 32 | # define __ctx(fld) __ ## fld |
| 33 | #endif |
| 34 | |
| 35 | #ifdef __USE_MISC |
| 36 | typedef int greg_t; |
| 37 | |
| 38 | /* Number of general registers. */ |
| 39 | # define NGREG 18 |
| 40 | |
| 41 | /* Container for all general registers. */ |
| 42 | typedef greg_t gregset_t[NGREG]; |
| 43 | |
| 44 | /* Number of each register is the `gregset_t' array. */ |
| 45 | enum |
| 46 | { |
| 47 | REG_R0 = 0, |
| 48 | # define REG_R0 REG_R0 |
| 49 | REG_R1 = 1, |
| 50 | # define REG_R1 REG_R1 |
| 51 | REG_R2 = 2, |
| 52 | # define REG_R2 REG_R2 |
| 53 | REG_R3 = 3, |
| 54 | # define REG_R3 REG_R3 |
| 55 | REG_R4 = 4, |
| 56 | # define REG_R4 REG_R4 |
| 57 | REG_R5 = 5, |
| 58 | # define REG_R5 REG_R5 |
| 59 | REG_R6 = 6, |
| 60 | # define REG_R6 REG_R6 |
| 61 | REG_R7 = 7, |
| 62 | # define REG_R7 REG_R7 |
| 63 | REG_R8 = 8, |
| 64 | # define REG_R8 REG_R8 |
| 65 | REG_R9 = 9, |
| 66 | # define REG_R9 REG_R9 |
| 67 | REG_R10 = 10, |
| 68 | # define REG_R10 REG_R10 |
| 69 | REG_R11 = 11, |
| 70 | # define REG_R11 REG_R11 |
| 71 | REG_R12 = 12, |
| 72 | # define REG_R12 REG_R12 |
| 73 | REG_R13 = 13, |
| 74 | # define REG_R13 REG_R13 |
| 75 | REG_R14 = 14, |
| 76 | # define REG_R14 REG_R14 |
| 77 | REG_R15 = 15 |
| 78 | # define REG_R15 REG_R15 |
| 79 | }; |
| 80 | |
| 81 | struct _libc_fpstate |
| 82 | { |
| 83 | struct |
| 84 | { |
| 85 | unsigned int sign1:1; |
| 86 | unsigned int unused:15; |
| 87 | unsigned int sign2:1; |
| 88 | unsigned int exponent:14; |
| 89 | unsigned int j:1; |
| 90 | unsigned int mantissa1:31; |
| 91 | unsigned int mantissa0:32; |
| 92 | } fpregs[8]; |
| 93 | unsigned int fpsr:32; |
| 94 | unsigned int fpcr:32; |
| 95 | unsigned char ftype[8]; |
| 96 | unsigned int init_flag; |
| 97 | }; |
| 98 | /* Structure to describe FPU registers. */ |
| 99 | typedef struct _libc_fpstate fpregset_t; |
| 100 | #endif |
| 101 | |
| 102 | /* Context to describe whole processor state. This only describes |
| 103 | the core registers; coprocessor registers get saved elsewhere |
| 104 | (e.g. in uc_regspace, or somewhere unspecified on the stack |
| 105 | during non-RT signal handlers). */ |
| 106 | typedef struct |
| 107 | { |
| 108 | unsigned long int __ctx(trap_no); |
| 109 | unsigned long int __ctx(error_code); |
| 110 | unsigned long int __ctx(oldmask); |
| 111 | unsigned long int __ctx(arm_r0); |
| 112 | unsigned long int __ctx(arm_r1); |
| 113 | unsigned long int __ctx(arm_r2); |
| 114 | unsigned long int __ctx(arm_r3); |
| 115 | unsigned long int __ctx(arm_r4); |
| 116 | unsigned long int __ctx(arm_r5); |
| 117 | unsigned long int __ctx(arm_r6); |
| 118 | unsigned long int __ctx(arm_r7); |
| 119 | unsigned long int __ctx(arm_r8); |
| 120 | unsigned long int __ctx(arm_r9); |
| 121 | unsigned long int __ctx(arm_r10); |
| 122 | unsigned long int __ctx(arm_fp); |
| 123 | unsigned long int __ctx(arm_ip); |
| 124 | unsigned long int __ctx(arm_sp); |
| 125 | unsigned long int __ctx(arm_lr); |
| 126 | unsigned long int __ctx(arm_pc); |
| 127 | unsigned long int __ctx(arm_cpsr); |
| 128 | unsigned long int __ctx(fault_address); |
| 129 | } mcontext_t; |
| 130 | |
| 131 | /* Userlevel context. */ |
| 132 | typedef struct ucontext_t |
| 133 | { |
| 134 | unsigned long __ctx(uc_flags); |
| 135 | struct ucontext_t *uc_link; |
| 136 | stack_t uc_stack; |
| 137 | mcontext_t uc_mcontext; |
| 138 | sigset_t uc_sigmask; |
| 139 | unsigned long __ctx(uc_regspace)[128] __attribute__((__aligned__(8))); |
| 140 | } ucontext_t; |
| 141 | |
| 142 | #undef __ctx |
| 143 | |
| 144 | #endif /* sys/ucontext.h */ |
| 145 |
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