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/* DWARF2 frame unwind data structure for Xtensa.

   Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2007, 2008,

   2009  Free Software Foundation, Inc.

   This file is part of GCC.

   GCC is free software; you can redistribute it and/or modify it

   under the terms of the GNU General Public License as published by

   the Free Software Foundation; either version 3, or (at your option)

   any later version.

   GCC 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 General Public

   License for more details.

   Under Section 7 of GPL version 3, you are granted additional

   permissions described in the GCC Runtime Library Exception, version

   3.1, as published by the Free Software Foundation.

   You should have received a copy of the GNU General Public License and

   a copy of the GCC Runtime Library Exception along with this program;

   see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see

   <http://www.gnu.org/licenses/>.  */

/* A target can override (perhaps for backward compatibility) how

   many dwarf2 columns are unwound.  */

#ifndef DWARF_FRAME_REGISTERS

#define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER

#endif

/* Xtensa's variable-size register window save areas can be unwound without

   any unwind info.  This is a stripped down version of the standard DWARF

   _Unwind_FrameState.  */

typedef struct

{

  /* The information we care about from the CIE/FDE.  */

  _Unwind_Personality_Fn personality;

  _Unwind_Word retaddr_column;

  unsigned char fde_encoding;

  unsigned char lsda_encoding;

  unsigned char saw_z;

  unsigned char signal_frame;

  void *eh_ptr;

  /* Saved registers for a signal frame.  */

  _Unwind_Word *signal_regs;

  _Unwind_Word signal_ra;

} _Unwind_FrameState;