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/* dwarf2dbg.h - DWARF2 debug support

   Copyright 1999, 2000, 2002, 2003, 2005, 2006, 2007, 2009

   Free Software Foundation, Inc.

   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 AS_DWARF2DBG_H

#define AS_DWARF2DBG_H

#include "as.h"

#define DWARF2_FLAG_IS_STMT             (1 << 0)

#define DWARF2_FLAG_BASIC_BLOCK         (1 << 1)

#define DWARF2_FLAG_PROLOGUE_END        (1 << 2)

#define DWARF2_FLAG_EPILOGUE_BEGIN      (1 << 3)

struct dwarf2_line_info {

  unsigned int filenum;

  unsigned int line;

  unsigned int column;

  unsigned int isa;

  unsigned int flags;

  unsigned int discriminator;

};

/* Implements the .file FILENO "FILENAME" directive.  FILENO can be 0

   to indicate that no file number has been assigned.  All real file

   number must be >0.  */

extern char *dwarf2_directive_file (int dummy);

/* Implements the .loc FILENO LINENO [COLUMN] directive.  FILENO is

   the file number, LINENO the line number and the (optional) COLUMN

   the column of the source code that the following instruction

   corresponds to.  FILENO can be 0 to indicate that the filename

   specified by the textually most recent .file directive should be

   used.  */

extern void dwarf2_directive_loc (int dummy);

/* Implements the .loc_mark_labels {0,1} directive.  */

extern void dwarf2_directive_loc_mark_labels (int dummy);

/* Returns the current source information.  If .file directives have

   been encountered, the info for the corresponding source file is

   returned.  Otherwise, the info for the assembly source file is

   returned.  */

extern void dwarf2_where (struct dwarf2_line_info *l);

/* A hook to allow the target backend to inform the line number state

   machine of isa changes when assembler debug info is enabled.  */

extern void dwarf2_set_isa (unsigned int isa);

/* This function generates .debug_line info based on the address and

   source information passed in the arguments.  ADDR should be the

   frag-relative offset of the instruction the information is for and

   L is the source information that should be associated with that

   address.  */

extern void dwarf2_gen_line_info (addressT addr, struct dwarf2_line_info *l);

/* Must be called for each generated instruction.  */

extern void dwarf2_emit_insn (int);

/* Reset the state of the line number information to reflect that

   it has been used.  */

extern void dwarf2_consume_line_info (void);

/* Should be called for each code label.  */

extern void dwarf2_emit_label (symbolS *);

/* True when we've seen a .loc directive recently.  Used to avoid

   doing work when there's nothing to do.  */

extern bfd_boolean dwarf2_loc_directive_seen;

/* True when we're supposed to set the basic block mark whenever a label

   is seen.  Unless the target is doing Something Weird, just call

   dwarf2_emit_label.  */

extern bfd_boolean dwarf2_loc_mark_labels;

extern void dwarf2_finish (void);

extern int dwarf2dbg_estimate_size_before_relax (fragS *);

extern int dwarf2dbg_relax_frag (fragS *);

extern void dwarf2dbg_convert_frag (fragS *);

/* An enumeration which describes the sizes of offsets (to DWARF sections)

   and the mechanism by which the size is indicated.  */

enum dwarf2_format {

  /* 32-bit format: the initial length field is 4 bytes long.  */

  dwarf2_format_32bit,

  /* DWARF3 64-bit format: the representation of the initial length

     (of a DWARF section) is 0xffffffff (4 bytes) followed by eight

     bytes indicating the actual length.  */

  dwarf2_format_64bit,

  /* SGI extension to DWARF2: The initial length is eight bytes.  */

  dwarf2_format_64bit_irix

};

#endif /* AS_DWARF2DBG_H */