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/* Copyright (C) 1998-2020 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
/* System V/AArch64 ABI compliant context switching support. */
#ifndef _SYS_UCONTEXT_H
#define _SYS_UCONTEXT_H 1
#include <features.h>
#include <bits/types/sigset_t.h>
#include <bits/types/stack_t.h>
#ifdef __USE_MISC
# define __ctx(fld) fld
#else
# define __ctx(fld) __ ## fld
#endif
#ifdef __USE_MISC
# include <sys/procfs.h>
typedef elf_greg_t greg_t;
/* Container for all general registers. */
typedef elf_gregset_t gregset_t;
/* Structure to describe FPU registers. */
typedef elf_fpregset_t fpregset_t;
#endif
/* Context to describe whole processor state. This only describes
the core registers; coprocessor registers get saved elsewhere
(e.g. in uc_regspace, or somewhere unspecified on the stack
during non-RT signal handlers). */
typedef struct
{
unsigned long long int __ctx(fault_address);
unsigned long long int __ctx(regs)[31];
unsigned long long int __ctx(sp);
unsigned long long int __ctx(pc);
unsigned long long int __ctx(pstate);
/* This field contains extension records for additional processor
state such as the FP/SIMD state. It has to match the definition
of the corresponding field in the sigcontext struct, see the
arch/arm64/include/uapi/asm/sigcontext.h linux header for details. */
unsigned char __reserved[4096] __attribute__ ((__aligned__ (16)));
} mcontext_t;
/* Userlevel context. */
typedef struct ucontext_t
{
unsigned long __ctx(uc_flags);
struct ucontext_t *uc_link;
stack_t uc_stack;
sigset_t uc_sigmask;
mcontext_t uc_mcontext;
} ucontext_t;
#undef __ctx
#endif /* sys/ucontext.h */
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