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/* Copyright (C) 2000, 2001, 2002 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
<http://www.gnu.org/licenses/>. */
#ifndef _SYS_UCONTEXT_H
#define _SYS_UCONTEXT_H 1
/* Forward definition to avoid parse errors */
struct ucontext;
typedef struct ucontext ucontext_t;
#include <features.h>
#include <signal.h>
/* We need the signal context definitions even if they are not used
included in <signal.h>. */
#include <bits/sigcontext.h>
/* Type for a program status word. */
typedef struct
{
unsigned long mask;
unsigned long 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
/* Must match kernels psw_t alignment. */
typedef greg_t gregset_t[NGREG] __attribute__ ((aligned(8)));
typedef union
{
double d;
float f;
} fpreg_t;
/* Register set for the floating-point registers. */
typedef struct
{
unsigned int fpc;
fpreg_t fprs[16];
} fpregset_t;
/* Context to describe whole processor state. */
typedef struct
{
__psw_t psw;
unsigned long gregs[16];
unsigned int aregs[16];
fpregset_t fpregs;
} mcontext_t;
/* Userlevel context. */
struct ucontext
{
unsigned long int uc_flags;
struct ucontext *uc_link;
stack_t uc_stack;
mcontext_t uc_mcontext;
__sigset_t uc_sigmask;
};
#endif /* sys/ucontext.h */
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