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/* Copyright (C) 1998-2017 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
<http://www.gnu.org/licenses/>. */
/* System V/ARM ABI compliant context switching support. */
#ifndef _SYS_UCONTEXT_H
#define _SYS_UCONTEXT_H 1
#include <features.h>
#include <signal.h>
/* We need the signal context definitions even if they are not exposed
by <signal.h>. */
#include <bits/sigcontext.h>
#include <bits/sigstack.h>
typedef int greg_t;
/* Number of general registers. */
#define NGREG 16
/* Container for all general registers. */
typedef greg_t gregset_t[NGREG];
#ifdef __USE_MISC
/* Number of each register is the `gregset_t' array. */
enum
{
R0 = 0,
# define R0 R0
R1 = 1,
# define R1 R1
R2 = 2,
# define R2 R2
R3 = 3,
# define R3 R3
R4 = 4,
# define R4 R4
R5 = 5,
# define R5 R5
R6 = 6,
# define R6 R6
R7 = 7,
# define R7 R7
R8 = 8,
# define R8 R8
R9 = 9,
# define R9 R9
R10 = 10,
# define R10 R10
R11 = 11,
# define R11 R11
R12 = 12,
# define R12 R12
R13 = 13,
# define R13 R13
R14 = 14,
# define R14 R14
R15 = 15,
# define R15 R15
};
#endif
/* Structure to describe FPU registers. */
typedef struct fpregset
{
} fpregset_t;
/* Context to describe whole processor state. */
typedef struct
{
gregset_t gregs;
fpregset_t fpregs;
} mcontext_t;
/* Userlevel context. */
typedef struct ucontext
{
unsigned long int uc_flags;
struct ucontext *uc_link;
__sigset_t uc_sigmask;
stack_t uc_stack;
mcontext_t uc_mcontext;
long int uc_filler[5];
} ucontext_t;
#endif /* sys/ucontext.h */
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