/* Copyright (C) 1997-2018 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/i386 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>

/* Type for general register.  */

typedef int greg_t;

/* Number of general registers.  */

#define __NGREG	19

#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

{

  REG_GS = 0,

# define REG_GS	REG_GS

  REG_FS,

# define REG_FS	REG_FS

  REG_ES,

# define REG_ES	REG_ES

  REG_DS,

# define REG_DS	REG_DS

  REG_EDI,

# define REG_EDI	REG_EDI

  REG_ESI,

# define REG_ESI	REG_ESI

  REG_EBP,

# define REG_EBP	REG_EBP

  REG_ESP,

# define REG_ESP	REG_ESP

  REG_EBX,

# define REG_EBX	REG_EBX

  REG_EDX,

# define REG_EDX	REG_EDX

  REG_ECX,

# define REG_ECX	REG_ECX

  REG_EAX,

# define REG_EAX	REG_EAX

  REG_TRAPNO,

# define REG_TRAPNO	REG_TRAPNO

  REG_ERR,

# define REG_ERR	REG_ERR

  REG_EIP,

# define REG_EIP	REG_EIP

  REG_CS,

# define REG_CS	REG_CS

  REG_EFL,

# define REG_EFL	REG_EFL

  REG_UESP,

# define REG_UESP	REG_UESP

  REG_SS

# define REG_SS	REG_SS

};

#endif

#ifdef __USE_MISC

# define __ctx(fld) fld

# define __ctxt(tag) tag

#else

# define __ctx(fld) __ ## fld

# define __ctxt(tag) /* Empty.  */

#endif

/* Structure to describe FPU registers.  */

typedef struct

  {

    union

      {

	struct __ctxt(fpchip_state)

	  {

	    int __ctx(state)[27];

	    int __ctx(status);

	  } __ctx(fpchip_state);

	struct __ctxt(fp_emul_space)

	  {

	    char __ctx(fp_emul)[246];

	    char __ctx(fp_epad)[2];

	  } __ctx(fp_emul_space);

	int __ctx(f_fpregs)[62];

      } __ctx(fp_reg_set);

    long int __ctx(f_wregs)[33];

  } fpregset_t;

/* Context to describe whole processor state.  */

typedef struct

  {

    gregset_t __ctx(gregs);

    fpregset_t __ctx(fpregs);

  } mcontext_t;

/* Userlevel context.  */

typedef struct ucontext_t

  {

    unsigned long int __ctx(uc_flags);

    struct ucontext_t *uc_link;

    sigset_t uc_sigmask;

    stack_t uc_stack;

    mcontext_t uc_mcontext;

    long int __glibc_reserved1[5];

  } ucontext_t;

#undef __ctx

#undef __ctxt

#endif /* sys/ucontext.h */