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/* Copyright (C) 1998, 1999, 2001, 2006, 2011 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 used
included in <signal.h>. */
#include <bits/sigcontext.h>
typedef int greg_t;
/* Number of general registers. */
#define NGREG 18
/* Container for all general registers. */
typedef greg_t gregset_t[NGREG];
/* Number of each register is the `gregset_t' array. */
enum
{
REG_R0 = 0,
#define REG_R0 REG_R0
REG_R1 = 1,
#define REG_R1 REG_R1
REG_R2 = 2,
#define REG_R2 REG_R2
REG_R3 = 3,
#define REG_R3 REG_R3
REG_R4 = 4,
#define REG_R4 REG_R4
REG_R5 = 5,
#define REG_R5 REG_R5
REG_R6 = 6,
#define REG_R6 REG_R6
REG_R7 = 7,
#define REG_R7 REG_R7
REG_R8 = 8,
#define REG_R8 REG_R8
REG_R9 = 9,
#define REG_R9 REG_R9
REG_R10 = 10,
#define REG_R10 REG_R10
REG_R11 = 11,
#define REG_R11 REG_R11
REG_R12 = 12,
#define REG_R12 REG_R12
REG_R13 = 13,
#define REG_R13 REG_R13
REG_R14 = 14,
#define REG_R14 REG_R14
REG_R15 = 15
#define REG_R15 REG_R15
};
struct _libc_fpstate
{
struct
{
unsigned int sign1:1;
unsigned int unused:15;
unsigned int sign2:1;
unsigned int exponent:14;
unsigned int j:1;
unsigned int mantissa1:31;
unsigned int mantissa0:32;
} fpregs[8];
unsigned int fpsr:32;
unsigned int fpcr:32;
unsigned char ftype[8];
unsigned int init_flag;
};
/* Structure to describe FPU registers. */
typedef struct _libc_fpstate fpregset_t;
/* 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 sigcontext mcontext_t;
/* Userlevel context. */
typedef struct ucontext
{
unsigned long uc_flags;
struct ucontext *uc_link;
stack_t uc_stack;
mcontext_t uc_mcontext;
__sigset_t uc_sigmask;
unsigned long uc_regspace[128] __attribute__((__aligned__(8)));
} ucontext_t;
#endif /* sys/ucontext.h */
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