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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/mips 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/sigcontext.h>
#include <bits/types/stack_t.h>
#include <sgidefs.h>
/* Type for general register. */
#if _MIPS_SIM == _ABIO32
typedef __uint32_t greg_t;
#else
typedef __uint64_t greg_t;
#endif
/* Number of general registers. */
#define __NGREG 36
#ifdef __USE_MISC
# define NGREG __NGREG
#endif
/* Container for all general registers. */
typedef greg_t gregset_t[__NGREG];
#ifdef __USE_MISC
/* Number of each register is the `gregset_t' array. */
enum
{
CTX_R0 = 0,
# define CTX_R0 CTX_R0
CTX_AT = 1,
# define CTX_AT CTX_AT
CTX_V0 = 2,
# define CTX_V0 CTX_V0
CTX_V1 = 3,
# define CTX_V1 CTX_V1
CTX_A0 = 4,
# define CTX_A0 CTX_A0
CTX_A1 = 5,
# define CTX_A1 CTX_A1
CTX_A2 = 6,
# define CTX_A2 CTX_A2
CTX_A3 = 7,
# define CTX_A3 CTX_A3
CTX_T0 = 8,
# define CTX_T0 CTX_T0
CTX_T1 = 9,
# define CTX_T1 CTX_T1
CTX_T2 = 10,
# define CTX_T2 CTX_T2
CTX_T3 = 11,
# define CTX_T3 CTX_T3
CTX_T4 = 12,
# define CTX_T4 CTX_T4
CTX_T5 = 13,
# define CTX_T5 CTX_T5
CTX_T6 = 14,
# define CTX_T6 CTX_T6
CTX_T7 = 15,
# define CTX_T7 CTX_T7
CTX_S0 = 16,
# define CTX_S0 CTX_S0
CTX_S1 = 17,
# define CTX_S1 CTX_S1
CTX_S2 = 18,
# define CTX_S2 CTX_S2
CTX_S3 = 19,
# define CTX_S3 CTX_S3
CTX_S4 = 20,
# define CTX_S4 CTX_S4
CTX_S5 = 21,
# define CTX_S5 CTX_S5
CTX_S6 = 22,
# define CTX_S6 CTX_S6
CTX_S7 = 23,
# define CTX_S7 CTX_S7
CTX_T8 = 24,
# define CTX_T8 CTX_T8
CTX_T9 = 25,
# define CTX_T9 CTX_T9
CTX_K0 = 26,
# define CTX_K0 CTX_K0
CTX_K1 = 27,
# define CTX_K1 CTX_K1
CTX_GP = 28,
# define CTX_GP CTX_GP
CTX_SP = 29,
# define CTX_SP CTX_SP
CTX_S8 = 30,
# define CTX_S8 CTX_S8
CTX_RA = 31,
# define CTX_RA CTX_RA
CTX_MDLO = 32,
# define CTX_MDLO CTX_MDLO
CTX_MDHI = 33,
# define CTX_MDHI CTX_MDHI
CTX_CAUSE = 34,
# define CTX_CAUSE CTX_CAUSE
CTX_EPC = 35,
# define CTX_EPC CTX_EPC
};
#endif
#ifdef __USE_MISC
# define __ctx(fld) fld
#else
# define __ctx(fld) __ ## fld
#endif
/* Structure to describe FPU registers. */
typedef struct fpregset
{
union
{
#if _MIPS_SIM == _ABIO32
double __ctx(fp_dregs)[16];
float __ctx(fp_fregs)[32];
unsigned int __ctx(fp_regs)[32];
#else
double __ctx(fp_dregs)[32];
/* float __ctx(fp_fregs)[32]; */
__uint64_t __ctx(fp_regs)[32];
#endif
} __ctx(fp_r);
unsigned int __ctx(fp_csr);
unsigned int __ctx(fp_pad);
} fpregset_t;
/* Context to describe whole processor state. */
typedef struct
{
gregset_t __ctx(gpregs);
fpregset_t __ctx(fpregs);
} mcontext_t;
#undef __ctx
/* Userlevel context. */
typedef struct ucontext
{
#if _MIPS_SIM == _ABIO32
unsigned long int uc_flags;
#else
__uint64_t uc_flags;
#endif
struct ucontext *uc_link;
sigset_t uc_sigmask;
stack_t uc_stack;
mcontext_t uc_mcontext;
int uc_filler[48];
} ucontext_t;
#endif /* sys/ucontext.h */
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