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/* Copyright (C) 2000-2019 Free Software Foundation, Inc.
Contributed by Denis Joseph Barrow (djbarrow@de.ibm.com).
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/>. */
#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
/* Type for a program status word. */
typedef struct
{
unsigned long __ctx(mask);
unsigned long __ctx(addr);
} __attribute__ ((__aligned__(8))) __psw_t;
/* Type for a general-purpose register. */
typedef unsigned long greg_t;
/* And the whole bunch of them. We should have used `struct s390_regs',
but to avoid name space pollution and since the tradition says that
the register set is an array, we make gregset_t a simple array
that has the same size as s390_regs. This is needed for the
elf_prstatus structure. */
#if __WORDSIZE == 64
# define __NGREG 27
#else
# define __NGREG 36
#endif
#ifdef __USE_MISC
# define NGREG __NGREG
#endif
/* Must match kernels psw_t alignment. */
typedef greg_t gregset_t[__NGREG] __attribute__ ((__aligned__(8)));
typedef union
{
double __ctx(d);
float __ctx(f);
} fpreg_t;
/* Register set for the floating-point registers. */
typedef struct
{
unsigned int __ctx(fpc);
fpreg_t __ctx(fprs)[16];
} fpregset_t;
/* Context to describe whole processor state. */
typedef struct
{
__psw_t __ctx(psw);
unsigned long __ctx(gregs)[16];
unsigned int __ctx(aregs)[16];
fpregset_t __ctx(fpregs);
} mcontext_t;
/* Userlevel context. */
typedef struct ucontext_t
{
unsigned long int __ctx(uc_flags);
struct ucontext_t *uc_link;
stack_t uc_stack;
mcontext_t uc_mcontext;
sigset_t uc_sigmask;
} ucontext_t;
#undef __ctx
#endif /* sys/ucontext.h */
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