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/* genlink.h -- interface to the BFD generic linker

   Copyright 1993, 1994, 1996 Free Software Foundation, Inc.

   Written by Ian Lance Taylor, Cygnus Support.

This file is part of BFD, the Binary File Descriptor library.

This program 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 2 of the License, or

(at your option) any later version.

This program 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 this program; if not, write to the Free Software

Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

#ifndef GENLINK_H

#define GENLINK_H

/* This header file is internal to BFD.  It describes the internal

   structures and functions used by the BFD generic linker, in case

   any of the more specific linkers want to use or call them.  Note

   that some functions, such as _bfd_generic_link_hash_table_create,

   are declared in libbfd.h, because they are expected to be widely

   used.  The functions and structures in this file will probably only

   be used by a few files besides linker.c itself.  In fact, this file

   is not particularly complete; I have only put in the interfaces I

   actually needed.  */

/* The generic linker uses a hash table which is a derived class of

   the standard linker hash table, just as the other backend specific

   linkers do.  Do not confuse the generic linker hash table with the

   standard BFD linker hash table it is built upon.  */

/* Generic linker hash table entries.  */

struct generic_link_hash_entry

{

  struct bfd_link_hash_entry root;

  /* Whether this symbol has been written out.  */

  boolean written;

  /* Symbol from input BFD.  */

  asymbol *sym;

};

/* Generic linker hash table.  */

struct generic_link_hash_table

{

  struct bfd_link_hash_table root;

};

/* Look up an entry in an generic link hash table.  */

#define _bfd_generic_link_hash_lookup(table, string, create, copy, follow) \

  ((struct generic_link_hash_entry *) \

   bfd_link_hash_lookup (&(table)->root, (string), (create), (copy), (follow)))

/* Traverse an generic link hash table.  */

#define _bfd_generic_link_hash_traverse(table, func, info)              \

  (bfd_link_hash_traverse                                               \

   (&(table)->root,                                                     \

    (boolean (*) PARAMS ((struct bfd_link_hash_entry *, PTR))) (func),  \

    (info)))

/* Get the generic link hash table from the info structure.  This is

   just a cast.  */

#define _bfd_generic_hash_table(p) \

  ((struct generic_link_hash_table *) ((p)->hash))

/* The generic linker reads in the asymbol structures for an input BFD

   and keeps them in the outsymbol and symcount fields.  */

#define _bfd_generic_link_get_symbols(abfd) ((abfd)->outsymbols)

#define _bfd_generic_link_get_symcount(abfd) ((abfd)->symcount)

/* Add the symbols of input_bfd to the symbols being built for

   output_bfd.  */

extern boolean _bfd_generic_link_output_symbols

  PARAMS ((bfd *output_bfd, bfd *input_bfd, struct bfd_link_info *,

           size_t *psymalloc));

/* This structure is used to pass information to

   _bfd_generic_link_write_global_symbol, which may be called via

   _bfd_generic_link_hash_traverse.  */

struct generic_write_global_symbol_info

{

  struct bfd_link_info *info;

  bfd *output_bfd;

  size_t *psymalloc;

};

/* Write out a single global symbol.  This is expected to be called

   via _bfd_generic_link_hash_traverse.  The second argument must

   actually be a struct generic_write_global_symbol_info *.  */

extern boolean _bfd_generic_link_write_global_symbol

  PARAMS ((struct generic_link_hash_entry *, PTR));

/* Generic link hash table entry creation routine.  */

struct bfd_hash_entry *_bfd_generic_link_hash_newfunc

  PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *,

           const char *));

#endif