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| 1 | /* Copyright (C) 2000-2024 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 | #ifndef _SYS_UCONTEXT_H |
| 19 | #define _SYS_UCONTEXT_H 1 |
| 20 | |
| 21 | #include <features.h> |
| 22 | |
| 23 | #include <bits/types/sigset_t.h> |
| 24 | #include <bits/types/stack_t.h> |
| 25 | |
| 26 | |
| 27 | #ifdef __USE_MISC |
| 28 | # define __ctx(fld) fld |
| 29 | #else |
| 30 | # define __ctx(fld) __ ## fld |
| 31 | #endif |
| 32 | |
| 33 | /* Type for a program status word. */ |
| 34 | typedef struct |
| 35 | { |
| 36 | unsigned long __ctx(mask); |
| 37 | unsigned long __ctx(addr); |
| 38 | } __attribute__ ((__aligned__(8))) __psw_t; |
| 39 | |
| 40 | /* Type for a general-purpose register. */ |
| 41 | typedef unsigned long greg_t; |
| 42 | |
| 43 | /* And the whole bunch of them. We should have used `struct s390_regs', |
| 44 | but to avoid name space pollution and since the tradition says that |
| 45 | the register set is an array, we make gregset_t a simple array |
| 46 | that has the same size as s390_regs. This is needed for the |
| 47 | elf_prstatus structure. */ |
| 48 | #if __WORDSIZE == 64 |
| 49 | # define __NGREG 27 |
| 50 | #else |
| 51 | # define __NGREG 36 |
| 52 | #endif |
| 53 | #ifdef __USE_MISC |
| 54 | # define NGREG __NGREG |
| 55 | #endif |
| 56 | /* Must match kernels psw_t alignment. */ |
| 57 | typedef greg_t gregset_t[__NGREG] __attribute__ ((__aligned__(8))); |
| 58 | |
| 59 | typedef union |
| 60 | { |
| 61 | double __ctx(d); |
| 62 | float __ctx(f); |
| 63 | } fpreg_t; |
| 64 | |
| 65 | /* Register set for the floating-point registers. */ |
| 66 | typedef struct |
| 67 | { |
| 68 | unsigned int __ctx(fpc); |
| 69 | fpreg_t __ctx(fprs)[16]; |
| 70 | } fpregset_t; |
| 71 | |
| 72 | /* Context to describe whole processor state. */ |
| 73 | typedef struct |
| 74 | { |
| 75 | __psw_t __ctx(psw); |
| 76 | unsigned long __ctx(gregs)[16]; |
| 77 | unsigned int __ctx(aregs)[16]; |
| 78 | fpregset_t __ctx(fpregs); |
| 79 | } mcontext_t; |
| 80 | |
| 81 | /* Userlevel context. */ |
| 82 | typedef struct ucontext_t |
| 83 | { |
| 84 | unsigned long int __ctx(uc_flags); |
| 85 | struct ucontext_t *uc_link; |
| 86 | stack_t uc_stack; |
| 87 | mcontext_t uc_mcontext; |
| 88 | sigset_t uc_sigmask; |
| 89 | } ucontext_t; |
| 90 | |
| 91 | #undef __ctx |
| 92 | |
| 93 | |
| 94 | #endif /* sys/ucontext.h */ |
| 95 |
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