1/* Copyright (C) 1998-2022 Free Software Foundation, Inc.
2
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19/* System V/AArch64 ABI compliant context switching support. */
20
21#ifndef _SYS_UCONTEXT_H
22#define _SYS_UCONTEXT_H 1
23
24#include <features.h>
25
26#include <bits/types/sigset_t.h>
27#include <bits/types/stack_t.h>
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# include <sys/procfs.h>
37
38
39typedef elf_greg_t greg_t;
40
41/* Container for all general registers. */
42typedef elf_gregset_t gregset_t;
43
44/* Structure to describe FPU registers. */
45typedef elf_fpregset_t fpregset_t;
46#endif
47
48/* Context to describe whole processor state. This only describes
49 the core registers; coprocessor registers get saved elsewhere
50 (e.g. in uc_regspace, or somewhere unspecified on the stack
51 during non-RT signal handlers). */
52typedef struct
53 {
54 unsigned long long int __ctx(fault_address);
55 unsigned long long int __ctx(regs)[31];
56 unsigned long long int __ctx(sp);
57 unsigned long long int __ctx(pc);
58 unsigned long long int __ctx(pstate);
59 /* This field contains extension records for additional processor
60 state such as the FP/SIMD state. It has to match the definition
61 of the corresponding field in the sigcontext struct, see the
62 arch/arm64/include/uapi/asm/sigcontext.h linux header for details. */
63 unsigned char __reserved[4096] __attribute__ ((__aligned__ (16)));
64 } mcontext_t;
65
66/* Userlevel context. */
67typedef struct ucontext_t
68 {
69 unsigned long __ctx(uc_flags);
70 struct ucontext_t *uc_link;
71 stack_t uc_stack;
72 sigset_t uc_sigmask;
73 mcontext_t uc_mcontext;
74 } ucontext_t;
75
76#undef __ctx
77
78#endif /* sys/ucontext.h */
79