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/* dw2gencfi.h - Support for generating Dwarf2 CFI information.

   Copyright 2003, 2004, 2005, 2007, 2009 Free Software Foundation, Inc.

   Contributed by Michal Ludvig <mludvig@suse.cz>

   This file is part of GAS, the GNU Assembler.

   GAS 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.

   GAS 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.

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

   along with GAS; see the file COPYING.  If not, write to the Free

   Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA

   02110-1301, USA.  */

#ifndef DW2GENCFI_H

#define DW2GENCFI_H

#include "dwarf2.h"

struct symbol;

extern const pseudo_typeS cfi_pseudo_table[];

/* cfi_finish() is called at the end of file. It will complain if

   the last CFI wasn't properly closed by .cfi_endproc.  */

extern void cfi_finish (void);

/* Entry points for backends to add unwind information.  */

extern void cfi_new_fde (struct symbol *);

extern void cfi_end_fde (struct symbol *);

extern void cfi_set_return_column (unsigned);

extern void cfi_add_advance_loc (struct symbol *);

extern void cfi_add_CFA_offset (unsigned, offsetT);

extern void cfi_add_CFA_def_cfa (unsigned, offsetT);

extern void cfi_add_CFA_register (unsigned, unsigned);

extern void cfi_add_CFA_def_cfa_register (unsigned);

extern void cfi_add_CFA_def_cfa_offset (offsetT);

extern void cfi_add_CFA_restore (unsigned);

extern void cfi_add_CFA_undefined (unsigned);

extern void cfi_add_CFA_same_value (unsigned);

extern void cfi_add_CFA_remember_state (void);

extern void cfi_add_CFA_restore_state (void);

/* Structures for md_cfi_end.  */

#if defined (TE_PE) || defined (TE_PEP)

#define SUPPORT_FRAME_LINKONCE 1

#else

#define SUPPORT_FRAME_LINKONCE 0

#endif

struct cfi_insn_data

{

  struct cfi_insn_data *next;

#if SUPPORT_FRAME_LINKONCE

  segT cur_seg;

#endif

  int insn;

  union

  {

    struct

    {

      unsigned reg;

      offsetT offset;

    } ri;

    struct

    {

      unsigned reg1;

      unsigned reg2;

    } rr;

    unsigned r;

    offsetT i;

    struct

    {

      symbolS *lab1;

      symbolS *lab2;

    } ll;

    struct cfi_escape_data *esc;

    struct

    {

      unsigned reg, encoding;

      expressionS exp;

    } ea;

  } u;

};

struct fde_entry

{

  struct fde_entry *next;

#if SUPPORT_FRAME_LINKONCE

  segT cur_seg;

#endif

  symbolS *start_address;

  symbolS *end_address;

  struct cfi_insn_data *data;

  struct cfi_insn_data **last;

  unsigned char per_encoding;

  unsigned char lsda_encoding;

  expressionS personality;

  expressionS lsda;

  unsigned int return_column;

  unsigned int signal_frame;

#if SUPPORT_FRAME_LINKONCE

  int handled;

#endif

};

/* The list of all FDEs that have been collected.  */

extern struct fde_entry *all_fde_data;

/* Fake CFI type; outside the byte range of any real CFI insn.  */

#define CFI_adjust_cfa_offset   0x100

#define CFI_return_column       0x101

#define CFI_rel_offset          0x102

#define CFI_escape              0x103

#define CFI_signal_frame        0x104

#define CFI_val_encoded_addr    0x105

#endif /* DW2GENCFI_H */