/* Copyright (C) 1998-2018 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 <bits/types/sigset_t.h>

#include <bits/types/stack_t.h>

#ifdef __USE_MISC

# define __ctx(fld) fld

#else

# define __ctx(fld) __ ## fld

#endif

#ifdef __USE_MISC

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;

#endif

/* 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

  {

    unsigned long int __ctx(trap_no);

    unsigned long int __ctx(error_code);

    unsigned long int __ctx(oldmask);

    unsigned long int __ctx(arm_r0);

    unsigned long int __ctx(arm_r1);

    unsigned long int __ctx(arm_r2);

    unsigned long int __ctx(arm_r3);

    unsigned long int __ctx(arm_r4);

    unsigned long int __ctx(arm_r5);

    unsigned long int __ctx(arm_r6);

    unsigned long int __ctx(arm_r7);

    unsigned long int __ctx(arm_r8);

    unsigned long int __ctx(arm_r9);

    unsigned long int __ctx(arm_r10);

    unsigned long int __ctx(arm_fp);

    unsigned long int __ctx(arm_ip);

    unsigned long int __ctx(arm_sp);

    unsigned long int __ctx(arm_lr);

    unsigned long int __ctx(arm_pc);

    unsigned long int __ctx(arm_cpsr);

    unsigned long int __ctx(fault_address);

  } mcontext_t;

/* Userlevel context.  */

typedef struct ucontext_t

  {

    unsigned long __ctx(uc_flags);

    struct ucontext_t *uc_link;

    stack_t uc_stack;

    mcontext_t uc_mcontext;

    sigset_t uc_sigmask;

    unsigned long __ctx(uc_regspace)[128] __attribute__((__aligned__(8)));

  } ucontext_t;

#undef __ctx

#endif /* sys/ucontext.h */