PR25961, buffer overflow in coff_swap_aux_in

[deliverable/binutils-gdb.git] / bfd / libcoff.h

/* DO NOT EDIT!  -*- buffer-read-only: t -*-  This file is automatically
   generated from "libcoff-in.h" and "coffcode.h".
   Run "make headers" in your build bfd/ to regenerate.  */

/* BFD COFF object file private structure.
   Copyright (C) 1990-2020 Free Software Foundation, Inc.
   Written by 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 3 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., 51 Franklin Street - Fifth Floor, Boston,
   MA 02110-1301, USA.  */

#ifndef _LIBCOFF_H
#define _LIBCOFF_H 1

#include "bfdlink.h"
#include "coff-bfd.h"

#ifdef __cplusplus
extern "C" {
#endif

/* Object file tdata; access macros.  */

#define coff_data(bfd)		      ((bfd)->tdata.coff_obj_data)
#define obj_pe(bfd)		      (coff_data (bfd)->pe)
#define obj_go32(bfd)		      (coff_data (bfd)->go32)
#define obj_symbols(bfd)	      (coff_data (bfd)->symbols)
#define obj_sym_filepos(bfd)	      (coff_data (bfd)->sym_filepos)
#define obj_relocbase(bfd)	      (coff_data (bfd)->relocbase)
#define obj_raw_syments(bfd)	      (coff_data (bfd)->raw_syments)
#define obj_raw_syment_count(bfd)     (coff_data (bfd)->raw_syment_count)
#define obj_convert(bfd)	      (coff_data (bfd)->conversion_table)
#define obj_conv_table_size(bfd)      (coff_data (bfd)->conv_table_size)
#define obj_coff_external_syms(bfd)   (coff_data (bfd)->external_syms)
#define obj_coff_keep_syms(bfd)	      (coff_data (bfd)->keep_syms)
#define obj_coff_strings(bfd)	      (coff_data (bfd)->strings)
#define obj_coff_strings_len(bfd)     (coff_data (bfd)->strings_len)
#define obj_coff_keep_strings(bfd)    (coff_data (bfd)->keep_strings)
#define obj_coff_sym_hashes(bfd)      (coff_data (bfd)->sym_hashes)
#define obj_coff_strings_written(bfd) (coff_data (bfd)->strings_written)
#define obj_coff_local_toc_table(bfd) (coff_data (bfd)->local_toc_sym_map)

/* `Tdata' information kept for COFF files.  */

typedef struct coff_tdata
{
  struct coff_symbol_struct *symbols;	/* Symtab for input bfd.  */
  unsigned int *conversion_table;
  int conv_table_size;
  file_ptr sym_filepos;

  struct coff_ptr_struct *raw_syments;
  unsigned long raw_syment_count;

  /* These are only valid once writing has begun.  */
  unsigned long int relocbase;

  /* These members communicate important constants about the symbol table
     to GDB's symbol-reading code.  These `constants' unfortunately vary
     from coff implementation to implementation...  */
  unsigned local_n_btmask;
  unsigned local_n_btshft;
  unsigned local_n_tmask;
  unsigned local_n_tshift;
  unsigned local_symesz;
  unsigned local_auxesz;
  unsigned local_linesz;

  /* The unswapped external symbols.  May be NULL.  Read by
     _bfd_coff_get_external_symbols.  */
  void * external_syms;
  /* If this is TRUE, the external_syms may not be freed.  */
  bfd_boolean keep_syms;

  /* The string table.  May be NULL.  Read by
     _bfd_coff_read_string_table.  */
  char *strings;
  /* The length of the strings table.  For error checking.  */
  bfd_size_type strings_len;
  /* If this is TRUE, the strings may not be freed.  */
  bfd_boolean keep_strings;
  /* If this is TRUE, the strings have been written out already.  */
  bfd_boolean strings_written;

  /* Is this a PE format coff file?  */
  int pe;
  /* Used by the COFF backend linker.  */
  struct coff_link_hash_entry **sym_hashes;

  /* Used by the pe linker for PowerPC.  */
  int *local_toc_sym_map;

  struct bfd_link_info *link_info;

  /* Used by coff_find_nearest_line.  */
  void * line_info;

  /* A place to stash dwarf2 info for this bfd.  */
  void * dwarf2_find_line_info;

  /* The timestamp from the COFF file header.  */
  long timestamp;

  /* Copy of some of the f_flags bits in the COFF filehdr structure,
     used by ARM code.  */
  flagword flags;

  /* Is this a GO32 coff file?  */
  bfd_boolean go32;

  /* A stub (extra data prepended before the COFF image) and its size.
     Used by coff-go32-exe, it contains executable data that loads the
     COFF object into memory.  */
  char * stub;
  bfd_size_type stub_size;
} coff_data_type;

/* Tdata for pe image files.  */
typedef struct pe_tdata
{
  coff_data_type coff;
  struct internal_extra_pe_aouthdr pe_opthdr;
  int dll;
  int has_reloc_section;
  int dont_strip_reloc;
  int dos_message[16];
  /* The timestamp to insert into the output file.
     If the timestamp is -1 then the current time is used.  */
  int timestamp;
  bfd_boolean (*in_reloc_p) (bfd *, reloc_howto_type *);
  flagword real_flags;

  /* Build-id info.  */
  struct
  {
    bfd_boolean (*after_write_object_contents) (bfd *);
    const char *style;
    asection *sec;
  } build_id;
} pe_data_type;

#define pe_data(bfd)		((bfd)->tdata.pe_obj_data)

/* Tdata for XCOFF files.  */

struct xcoff_tdata
{
  /* Basic COFF information.  */
  coff_data_type coff;

  /* TRUE if this is an XCOFF64 file. */
  bfd_boolean xcoff64;

  /* TRUE if a large a.out header should be generated.  */
  bfd_boolean full_aouthdr;

  /* TOC value.  */
  bfd_vma toc;

  /* Index of section holding TOC.  */
  int sntoc;

  /* Index of section holding entry point.  */
  int snentry;

  /* .text alignment from optional header.  */
  int text_align_power;

  /* .data alignment from optional header.  */
  int data_align_power;

  /* modtype from optional header.  */
  short modtype;

  /* cputype from optional header.  */
  short cputype;

  /* maxdata from optional header.  */
  bfd_vma maxdata;

  /* maxstack from optional header.  */
  bfd_vma maxstack;

  /* Used by the XCOFF backend linker.  */
  asection **csects;
  long *debug_indices;
  unsigned int *lineno_counts;
  unsigned int import_file_id;
};

#define xcoff_data(abfd) ((abfd)->tdata.xcoff_obj_data)

/* We take the address of the first element of an asymbol to ensure that the
   macro is only ever applied to an asymbol.  */
#define coffsymbol(asymbol) ((coff_symbol_type *)(&((asymbol)->the_bfd)))

/* Tdata for sections in XCOFF files.  This is used by the linker.  */

struct xcoff_section_tdata
{
  /* Used for XCOFF csects created by the linker; points to the real
     XCOFF section which contains this csect.  */
  asection *enclosing;
  /* The lineno_count field for the enclosing section, because we are
     going to clobber it there.  */
  unsigned int lineno_count;
  /* The first and last symbol indices for symbols used by this csect.  */
  unsigned long first_symndx;
  unsigned long last_symndx;
};

/* An accessor macro the xcoff_section_tdata structure.  */
#define xcoff_section_data(abfd, sec) \
  ((struct xcoff_section_tdata *) coff_section_data ((abfd), (sec))->tdata)

/* Tdata for sections in PE files.  */

struct pei_section_tdata
{
  /* The virtual size of the section.  */
  bfd_size_type virt_size;
  /* The PE section flags.  */
  long pe_flags;
};

/* An accessor macro for the pei_section_tdata structure.  */
#define pei_section_data(abfd, sec) \
  ((struct pei_section_tdata *) coff_section_data ((abfd), (sec))->tdata)

/* COFF linker hash table entries.  */

struct coff_link_hash_entry
{
  struct bfd_link_hash_entry root;

  /* Symbol index in output file.  Set to -1 initially.  Set to -2 if
     there is a reloc against this symbol.  */
  long indx;

  /* Symbol type.  */
  unsigned short type;

  /* Symbol class.  */
  unsigned char symbol_class;

  /* Number of auxiliary entries.  */
  char numaux;

  /* BFD to take auxiliary entries from.  */
  bfd *auxbfd;

  /* Pointer to array of auxiliary entries, if any.  */
  union internal_auxent *aux;

  /* Flag word; legal values follow.  */
  unsigned short coff_link_hash_flags;
  /* Symbol is a PE section symbol.  */
#define COFF_LINK_HASH_PE_SECTION_SYMBOL (01)
};

/* COFF linker hash table.  */

struct coff_link_hash_table
{
  struct bfd_link_hash_table root;
  /* A pointer to information used to link stabs in sections.  */
  struct stab_info stab_info;
};

struct coff_reloc_cookie
{
  struct internal_reloc *	  rels;
  struct internal_reloc *	  rel;
  struct internal_reloc *	  relend;
  struct coff_symbol_struct *	  symbols;	/* Symtab for input bfd.  */
  bfd *				  abfd;
  struct coff_link_hash_entry **  sym_hashes;
};

/* Look up an entry in a COFF linker hash table.  */

#define coff_link_hash_lookup(table, string, create, copy, follow)	\
  ((struct coff_link_hash_entry *)					\
   bfd_link_hash_lookup (&(table)->root, (string), (create),		\
			 (copy), (follow)))

/* Traverse a COFF linker hash table.  */

#define coff_link_hash_traverse(table, func, info)			\
  (bfd_link_hash_traverse						\
   (&(table)->root,							\
    (bfd_boolean (*) (struct bfd_link_hash_entry *, void *)) (func), \
    (info)))

/* Get the COFF linker hash table from a link_info structure.  */

#define coff_hash_table(p) ((struct coff_link_hash_table *) ((p)->hash))

/* Functions in coffgen.c.  */
extern bfd_cleanup coff_object_p
  (bfd *);
extern struct bfd_section *coff_section_from_bfd_index
  (bfd *, int);
extern long coff_get_symtab_upper_bound
  (bfd *);
extern long coff_canonicalize_symtab
  (bfd *, asymbol **);
extern int coff_count_linenumbers
  (bfd *);
extern bfd_boolean coff_renumber_symbols
  (bfd *, int *);
extern void coff_mangle_symbols
  (bfd *);
extern bfd_boolean coff_write_symbols
  (bfd *);
extern bfd_boolean coff_write_alien_symbol
  (bfd *, asymbol *, struct internal_syment *, union internal_auxent *,
   bfd_vma *, bfd_size_type *, asection **, bfd_size_type *);
extern bfd_boolean coff_write_linenumbers
  (bfd *);
extern alent *coff_get_lineno
  (bfd *, asymbol *);
extern asymbol *coff_section_symbol
  (bfd *, char *);
extern bfd_boolean _bfd_coff_get_external_symbols
  (bfd *);
extern const char *_bfd_coff_read_string_table
  (bfd *);
extern bfd_boolean _bfd_coff_free_symbols
  (bfd *);
extern struct coff_ptr_struct *coff_get_normalized_symtab
  (bfd *);
extern long coff_get_reloc_upper_bound
  (bfd *, sec_ptr);
extern asymbol *coff_make_empty_symbol
  (bfd *);
extern void coff_print_symbol
  (bfd *, void * filep, asymbol *, bfd_print_symbol_type);
extern void coff_get_symbol_info
  (bfd *, asymbol *, symbol_info *ret);
#define coff_get_symbol_version_string \
  _bfd_nosymbols_get_symbol_version_string
extern bfd_boolean _bfd_coff_is_local_label_name
  (bfd *, const char *);
extern asymbol *coff_bfd_make_debug_symbol
  (bfd *, void *, unsigned long);
extern bfd_boolean coff_find_nearest_line
  (bfd *, asymbol **, asection *, bfd_vma,
   const char **, const char **, unsigned int *, unsigned int *);
#define coff_find_line _bfd_nosymbols_find_line
struct dwarf_debug_section;
extern bfd_boolean coff_find_nearest_line_with_names
  (bfd *, asymbol **, asection *, bfd_vma, const char **, const char **,
   unsigned int *, const struct dwarf_debug_section *);
extern bfd_boolean coff_find_inliner_info
  (bfd *, const char **, const char **, unsigned int *);
extern int coff_sizeof_headers
  (bfd *, struct bfd_link_info *);
extern bfd_boolean bfd_coff_reloc16_relax_section
  (bfd *, asection *, struct bfd_link_info *, bfd_boolean *);
extern bfd_byte *bfd_coff_reloc16_get_relocated_section_contents
  (bfd *, struct bfd_link_info *, struct bfd_link_order *,
   bfd_byte *, bfd_boolean, asymbol **);
extern bfd_vma bfd_coff_reloc16_get_value
  (arelent *, struct bfd_link_info *, asection *);
extern void bfd_perform_slip
  (bfd *, unsigned int, asection *, bfd_vma);
extern bfd_boolean _bfd_coff_close_and_cleanup
  (bfd *);

/* Functions and types in cofflink.c.  */

#define STRING_SIZE_SIZE 4

/* We use a hash table to merge identical enum, struct, and union
   definitions in the linker.  */

/* Information we keep for a single element (an enum value, a
   structure or union field) in the debug merge hash table.  */

struct coff_debug_merge_element
{
  /* Next element.  */
  struct coff_debug_merge_element *next;

  /* Name.  */
  const char *name;

  /* Type.  */
  unsigned int type;

  /* Symbol index for complex type.  */
  long tagndx;
};

/* A linked list of debug merge entries for a given name.  */

struct coff_debug_merge_type
{
  /* Next type with the same name.  */
  struct coff_debug_merge_type *next;

  /* Class of type.  */
  int type_class;

  /* Symbol index where this type is defined.  */
  long indx;

  /* List of elements.  */
  struct coff_debug_merge_element *elements;
};

/* Information we store in the debug merge hash table.  */

struct coff_debug_merge_hash_entry
{
  struct bfd_hash_entry root;

  /* A list of types with this name.  */
  struct coff_debug_merge_type *types;
};

/* The debug merge hash table.  */

struct coff_debug_merge_hash_table
{
  struct bfd_hash_table root;
};

/* Initialize a COFF debug merge hash table.  */

#define coff_debug_merge_hash_table_init(table) \
  (bfd_hash_table_init (&(table)->root, _bfd_coff_debug_merge_hash_newfunc, \
			sizeof (struct coff_debug_merge_hash_entry)))

/* Free a COFF debug merge hash table.  */

#define coff_debug_merge_hash_table_free(table) \
  (bfd_hash_table_free (&(table)->root))

/* Look up an entry in a COFF debug merge hash table.  */

#define coff_debug_merge_hash_lookup(table, string, create, copy) \
  ((struct coff_debug_merge_hash_entry *) \
   bfd_hash_lookup (&(table)->root, (string), (create), (copy)))

/* Information we keep for each section in the output file when doing
   a relocatable link.  */

struct coff_link_section_info
{
  /* The relocs to be output.  */
  struct internal_reloc *relocs;
  /* For each reloc against a global symbol whose index was not known
     when the reloc was handled, the global hash table entry.  */
  struct coff_link_hash_entry **rel_hashes;
};

/* Information that we pass around while doing the final link step.  */

struct coff_final_link_info
{
  /* General link information.  */
  struct bfd_link_info *info;
  /* Output BFD.  */
  bfd *output_bfd;
  /* Used to indicate failure in traversal routine.  */
  bfd_boolean failed;
  /* If doing "task linking" set only during the time when we want the
     global symbol writer to convert the storage class of defined global
     symbols from global to static. */
  bfd_boolean global_to_static;
  /* Hash table for long symbol names.  */
  struct bfd_strtab_hash *strtab;
  /* When doing a relocatable link, an array of information kept for
     each output section, indexed by the target_index field.  */
  struct coff_link_section_info *section_info;
  /* Symbol index of last C_FILE symbol (-1 if none).  */
  long last_file_index;
  /* Contents of last C_FILE symbol.  */
  struct internal_syment last_file;
  /* Symbol index of first aux entry of last .bf symbol with an empty
     endndx field (-1 if none).  */
  long last_bf_index;
  /* Contents of last_bf_index aux entry.  */
  union internal_auxent last_bf;
  /* Hash table used to merge debug information.  */
  struct coff_debug_merge_hash_table debug_merge;
  /* Buffer large enough to hold swapped symbols of any input file.  */
  struct internal_syment *internal_syms;
  /* Buffer large enough to hold sections of symbols of any input file.  */
  asection **sec_ptrs;
  /* Buffer large enough to hold output indices of symbols of any
     input file.  */
  long *sym_indices;
  /* Buffer large enough to hold output symbols for any input file.  */
  bfd_byte *outsyms;
  /* Buffer large enough to hold external line numbers for any input
     section.  */
  bfd_byte *linenos;
  /* Buffer large enough to hold any input section.  */
  bfd_byte *contents;
  /* Buffer large enough to hold external relocs of any input section.  */
  bfd_byte *external_relocs;
  /* Buffer large enough to hold swapped relocs of any input section.  */
  struct internal_reloc *internal_relocs;
};

/* Most COFF variants have no way to record the alignment of a
   section.  This struct is used to set a specific alignment based on
   the name of the section.  */

struct coff_section_alignment_entry
{
  /* The section name.  */
  const char *name;

  /* This is either (unsigned int) -1, indicating that the section
     name must match exactly, or it is the number of letters which
     must match at the start of the name.  */
  unsigned int comparison_length;

  /* These macros may be used to fill in the first two fields in a
     structure initialization.  */
#define COFF_SECTION_NAME_EXACT_MATCH(name) (name), ((unsigned int) -1)
#define COFF_SECTION_NAME_PARTIAL_MATCH(name) (name), (sizeof (name) - 1)

  /* Only use this entry if the default section alignment for this
     target is at least that much (as a power of two).  If this field
     is COFF_ALIGNMENT_FIELD_EMPTY, it should be ignored.  */
  unsigned int default_alignment_min;

  /* Only use this entry if the default section alignment for this
     target is no greater than this (as a power of two).  If this
     field is COFF_ALIGNMENT_FIELD_EMPTY, it should be ignored.  */
  unsigned int default_alignment_max;

#define COFF_ALIGNMENT_FIELD_EMPTY ((unsigned int) -1)

  /* The desired alignment for this section (as a power of two).  */
  unsigned int alignment_power;
};

extern struct bfd_hash_entry *_bfd_coff_link_hash_newfunc
  (struct bfd_hash_entry *, struct bfd_hash_table *, const char *);
extern bfd_boolean _bfd_coff_link_hash_table_init
  (struct coff_link_hash_table *, bfd *,
   struct bfd_hash_entry *(*) (struct bfd_hash_entry *,
			       struct bfd_hash_table *,
			       const char *),
   unsigned int);
extern struct bfd_link_hash_table *_bfd_coff_link_hash_table_create
  (bfd *);
extern const char *_bfd_coff_internal_syment_name
  (bfd *, const struct internal_syment *, char *);
extern bfd_boolean _bfd_coff_section_already_linked
  (bfd *, asection *, struct bfd_link_info *);
extern bfd_boolean _bfd_coff_link_add_symbols
  (bfd *, struct bfd_link_info *);
extern bfd_boolean _bfd_coff_final_link
  (bfd *, struct bfd_link_info *);
extern struct internal_reloc *_bfd_coff_read_internal_relocs
  (bfd *, asection *, bfd_boolean, bfd_byte *, bfd_boolean,
   struct internal_reloc *);
extern bfd_boolean _bfd_coff_generic_relocate_section
  (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
   struct internal_reloc *, struct internal_syment *, asection **);
extern struct bfd_hash_entry *_bfd_coff_debug_merge_hash_newfunc
  (struct bfd_hash_entry *, struct bfd_hash_table *, const char *);
extern bfd_boolean _bfd_coff_write_global_sym
  (struct bfd_hash_entry *, void *);
extern bfd_boolean _bfd_coff_write_task_globals
  (struct coff_link_hash_entry *, void *);
extern bfd_boolean _bfd_coff_link_input_bfd
  (struct coff_final_link_info *, bfd *);
extern bfd_boolean _bfd_coff_reloc_link_order
  (bfd *, struct coff_final_link_info *, asection *,
   struct bfd_link_order *);
extern bfd_boolean bfd_coff_gc_sections
  (bfd *, struct bfd_link_info *);
extern const char *bfd_coff_group_name
  (bfd *, const asection *);

#define coff_get_section_contents_in_window \
  _bfd_generic_get_section_contents_in_window

/* Functions in xcofflink.c.  */

extern long _bfd_xcoff_get_dynamic_symtab_upper_bound
  (bfd *);
extern long _bfd_xcoff_canonicalize_dynamic_symtab
  (bfd *, asymbol **);
extern long _bfd_xcoff_get_dynamic_reloc_upper_bound
  (bfd *);
extern long _bfd_xcoff_canonicalize_dynamic_reloc
  (bfd *, arelent **, asymbol **);
extern struct bfd_link_hash_table *_bfd_xcoff_bfd_link_hash_table_create
  (bfd *);
extern bfd_boolean _bfd_xcoff_bfd_link_add_symbols
  (bfd *, struct bfd_link_info *);
extern bfd_boolean _bfd_xcoff_bfd_final_link
  (bfd *, struct bfd_link_info *);
extern bfd_boolean _bfd_xcoff_define_common_symbol
  (bfd *, struct bfd_link_info *, struct bfd_link_hash_entry *);
extern bfd_boolean _bfd_ppc_xcoff_relocate_section
  (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
   struct internal_reloc *, struct internal_syment *, asection **);

/* Functions in coff-ppc.c.  FIXME: These are called by pe.em in the
   linker, and so should start with bfd and be declared in bfd.h.  */

extern bfd_boolean ppc_allocate_toc_section
  (struct bfd_link_info *);
extern bfd_boolean ppc_process_before_allocation
  (bfd *, struct bfd_link_info *);
/* Extracted from coffcode.h.  */

typedef struct coff_ptr_struct
{
  /* Remembers the offset from the first symbol in the file for
     this symbol. Generated by coff_renumber_symbols.  */
  unsigned int offset;

  /* Should the value of this symbol be renumbered.  Used for
     XCOFF C_BSTAT symbols.  Set by coff_slurp_symbol_table.  */
  unsigned int fix_value : 1;

  /* Should the tag field of this symbol be renumbered.
     Created by coff_pointerize_aux.  */
  unsigned int fix_tag : 1;

  /* Should the endidx field of this symbol be renumbered.
     Created by coff_pointerize_aux.  */
  unsigned int fix_end : 1;

  /* Should the x_csect.x_scnlen field be renumbered.
     Created by coff_pointerize_aux.  */
  unsigned int fix_scnlen : 1;

  /* Fix up an XCOFF C_BINCL/C_EINCL symbol.  The value is the
     index into the line number entries.  Set by coff_slurp_symbol_table.  */
  unsigned int fix_line : 1;

  /* The container for the symbol structure as read and translated
     from the file.  */
  union
  {
    union internal_auxent auxent;
    struct internal_syment syment;
  } u;

 /* Selector for the union above.  */
 bfd_boolean is_sym;
} combined_entry_type;


/* Each canonical asymbol really looks like this: */

typedef struct coff_symbol_struct
{
  /* The actual symbol which the rest of BFD works with */
  asymbol symbol;

  /* A pointer to the hidden information for this symbol */
  combined_entry_type *native;

  /* A pointer to the linenumber information for this symbol */
  struct lineno_cache_entry *lineno;

  /* Have the line numbers been relocated yet ? */
  bfd_boolean done_lineno;
} coff_symbol_type;
/* COFF symbol classifications.  */

enum coff_symbol_classification
{
  /* Global symbol.  */
  COFF_SYMBOL_GLOBAL,
  /* Common symbol.  */
  COFF_SYMBOL_COMMON,
  /* Undefined symbol.  */
  COFF_SYMBOL_UNDEFINED,
  /* Local symbol.  */
  COFF_SYMBOL_LOCAL,
  /* PE section symbol.  */
  COFF_SYMBOL_PE_SECTION
};

typedef asection * (*coff_gc_mark_hook_fn)
  (asection *, struct bfd_link_info *, struct internal_reloc *,
   struct coff_link_hash_entry *, struct internal_syment *);

typedef struct
{
  void (*_bfd_coff_swap_aux_in)
    (bfd *, void *, int, int, int, int, void *);

  void (*_bfd_coff_swap_sym_in)
    (bfd *, void *, void *);

  void (*_bfd_coff_swap_lineno_in)
    (bfd *, void *, void *);

  unsigned int (*_bfd_coff_swap_aux_out)
    (bfd *, void *, int, int, int, int, void *);

  unsigned int (*_bfd_coff_swap_sym_out)
    (bfd *, void *, void *);

  unsigned int (*_bfd_coff_swap_lineno_out)
    (bfd *, void *, void *);

  unsigned int (*_bfd_coff_swap_reloc_out)
    (bfd *, void *, void *);

  unsigned int (*_bfd_coff_swap_filehdr_out)
    (bfd *, void *, void *);

  unsigned int (*_bfd_coff_swap_aouthdr_out)
    (bfd *, void *, void *);

  unsigned int (*_bfd_coff_swap_scnhdr_out)
    (bfd *, void *, void *);

  unsigned int _bfd_filhsz;
  unsigned int _bfd_aoutsz;
  unsigned int _bfd_scnhsz;
  unsigned int _bfd_symesz;
  unsigned int _bfd_auxesz;
  unsigned int _bfd_relsz;
  unsigned int _bfd_linesz;
  unsigned int _bfd_filnmlen;
  bfd_boolean _bfd_coff_long_filenames;

  bfd_boolean _bfd_coff_long_section_names;
  bfd_boolean (*_bfd_coff_set_long_section_names)
    (bfd *, int);

  unsigned int _bfd_coff_default_section_alignment_power;
  bfd_boolean _bfd_coff_force_symnames_in_strings;
  unsigned int _bfd_coff_debug_string_prefix_length;
  unsigned int _bfd_coff_max_nscns;

  void (*_bfd_coff_swap_filehdr_in)
    (bfd *, void *, void *);

  void (*_bfd_coff_swap_aouthdr_in)
    (bfd *, void *, void *);

  void (*_bfd_coff_swap_scnhdr_in)
    (bfd *, void *, void *);

  void (*_bfd_coff_swap_reloc_in)
    (bfd *abfd, void *, void *);

  bfd_boolean (*_bfd_coff_bad_format_hook)
    (bfd *, void *);

  bfd_boolean (*_bfd_coff_set_arch_mach_hook)
    (bfd *, void *);

  void * (*_bfd_coff_mkobject_hook)
    (bfd *, void *, void *);

  bfd_boolean (*_bfd_styp_to_sec_flags_hook)
    (bfd *, void *, const char *, asection *, flagword *);

  void (*_bfd_set_alignment_hook)
    (bfd *, asection *, void *);

  bfd_boolean (*_bfd_coff_slurp_symbol_table)
    (bfd *);

  bfd_boolean (*_bfd_coff_symname_in_debug)
    (bfd *, struct internal_syment *);

  bfd_boolean (*_bfd_coff_pointerize_aux_hook)
    (bfd *, combined_entry_type *, combined_entry_type *,
     unsigned int, combined_entry_type *);

  bfd_boolean (*_bfd_coff_print_aux)
    (bfd *, FILE *, combined_entry_type *, combined_entry_type *,
     combined_entry_type *, unsigned int);

  void (*_bfd_coff_reloc16_extra_cases)
    (bfd *, struct bfd_link_info *, struct bfd_link_order *, arelent *,
     bfd_byte *, unsigned int *, unsigned int *);

  int (*_bfd_coff_reloc16_estimate)
    (bfd *, asection *, arelent *, unsigned int,
     struct bfd_link_info *);

  enum coff_symbol_classification (*_bfd_coff_classify_symbol)
    (bfd *, struct internal_syment *);

  bfd_boolean (*_bfd_coff_compute_section_file_positions)
    (bfd *);

  bfd_boolean (*_bfd_coff_start_final_link)
    (bfd *, struct bfd_link_info *);

  bfd_boolean (*_bfd_coff_relocate_section)
    (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
     struct internal_reloc *, struct internal_syment *, asection **);

  reloc_howto_type *(*_bfd_coff_rtype_to_howto)
    (bfd *, asection *, struct internal_reloc *,
     struct coff_link_hash_entry *, struct internal_syment *, bfd_vma *);

  bfd_boolean (*_bfd_coff_adjust_symndx)
    (bfd *, struct bfd_link_info *, bfd *, asection *,
     struct internal_reloc *, bfd_boolean *);

  bfd_boolean (*_bfd_coff_link_add_one_symbol)
    (struct bfd_link_info *, bfd *, const char *, flagword,
     asection *, bfd_vma, const char *, bfd_boolean, bfd_boolean,
     struct bfd_link_hash_entry **);

  bfd_boolean (*_bfd_coff_link_output_has_begun)
    (bfd *, struct coff_final_link_info *);

  bfd_boolean (*_bfd_coff_final_link_postscript)
    (bfd *, struct coff_final_link_info *);

  bfd_boolean (*_bfd_coff_print_pdata)
    (bfd *, void *);

} bfd_coff_backend_data;

#define coff_backend_info(abfd) \
  ((bfd_coff_backend_data *) (abfd)->xvec->backend_data)

#define bfd_coff_swap_aux_in(a,e,t,c,ind,num,i) \
  ((coff_backend_info (a)->_bfd_coff_swap_aux_in) (a,e,t,c,ind,num,i))

#define bfd_coff_swap_sym_in(a,e,i) \
  ((coff_backend_info (a)->_bfd_coff_swap_sym_in) (a,e,i))

#define bfd_coff_swap_lineno_in(a,e,i) \
  ((coff_backend_info ( a)->_bfd_coff_swap_lineno_in) (a,e,i))

#define bfd_coff_swap_reloc_out(abfd, i, o) \
  ((coff_backend_info (abfd)->_bfd_coff_swap_reloc_out) (abfd, i, o))

#define bfd_coff_swap_lineno_out(abfd, i, o) \
  ((coff_backend_info (abfd)->_bfd_coff_swap_lineno_out) (abfd, i, o))

#define bfd_coff_swap_aux_out(a,i,t,c,ind,num,o) \
  ((coff_backend_info (a)->_bfd_coff_swap_aux_out) (a,i,t,c,ind,num,o))

#define bfd_coff_swap_sym_out(abfd, i,o) \
  ((coff_backend_info (abfd)->_bfd_coff_swap_sym_out) (abfd, i, o))

#define bfd_coff_swap_scnhdr_out(abfd, i,o) \
  ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_out) (abfd, i, o))

#define bfd_coff_swap_filehdr_out(abfd, i,o) \
  ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_out) (abfd, i, o))

#define bfd_coff_swap_aouthdr_out(abfd, i,o) \
  ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_out) (abfd, i, o))

#define bfd_coff_filhsz(abfd) (coff_backend_info (abfd)->_bfd_filhsz)
#define bfd_coff_aoutsz(abfd) (coff_backend_info (abfd)->_bfd_aoutsz)
#define bfd_coff_scnhsz(abfd) (coff_backend_info (abfd)->_bfd_scnhsz)
#define bfd_coff_symesz(abfd) (coff_backend_info (abfd)->_bfd_symesz)
#define bfd_coff_auxesz(abfd) (coff_backend_info (abfd)->_bfd_auxesz)
#define bfd_coff_relsz(abfd)  (coff_backend_info (abfd)->_bfd_relsz)
#define bfd_coff_linesz(abfd) (coff_backend_info (abfd)->_bfd_linesz)
#define bfd_coff_filnmlen(abfd) (coff_backend_info (abfd)->_bfd_filnmlen)
#define bfd_coff_long_filenames(abfd) \
  (coff_backend_info (abfd)->_bfd_coff_long_filenames)
#define bfd_coff_long_section_names(abfd) \
  (coff_backend_info (abfd)->_bfd_coff_long_section_names)
#define bfd_coff_set_long_section_names(abfd, enable) \
  ((coff_backend_info (abfd)->_bfd_coff_set_long_section_names) (abfd, enable))
#define bfd_coff_default_section_alignment_power(abfd) \
  (coff_backend_info (abfd)->_bfd_coff_default_section_alignment_power)
#define bfd_coff_max_nscns(abfd) \
  (coff_backend_info (abfd)->_bfd_coff_max_nscns)

#define bfd_coff_swap_filehdr_in(abfd, i,o) \
  ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_in) (abfd, i, o))

#define bfd_coff_swap_aouthdr_in(abfd, i,o) \
  ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_in) (abfd, i, o))

#define bfd_coff_swap_scnhdr_in(abfd, i,o) \
  ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_in) (abfd, i, o))

#define bfd_coff_swap_reloc_in(abfd, i, o) \
  ((coff_backend_info (abfd)->_bfd_coff_swap_reloc_in) (abfd, i, o))

#define bfd_coff_bad_format_hook(abfd, filehdr) \
  ((coff_backend_info (abfd)->_bfd_coff_bad_format_hook) (abfd, filehdr))

#define bfd_coff_set_arch_mach_hook(abfd, filehdr)\
  ((coff_backend_info (abfd)->_bfd_coff_set_arch_mach_hook) (abfd, filehdr))
#define bfd_coff_mkobject_hook(abfd, filehdr, aouthdr)\
  ((coff_backend_info (abfd)->_bfd_coff_mkobject_hook)\
   (abfd, filehdr, aouthdr))

#define bfd_coff_styp_to_sec_flags_hook(abfd, scnhdr, name, section, flags_ptr)\
  ((coff_backend_info (abfd)->_bfd_styp_to_sec_flags_hook)\
   (abfd, scnhdr, name, section, flags_ptr))

#define bfd_coff_set_alignment_hook(abfd, sec, scnhdr)\
  ((coff_backend_info (abfd)->_bfd_set_alignment_hook) (abfd, sec, scnhdr))

#define bfd_coff_slurp_symbol_table(abfd)\
  ((coff_backend_info (abfd)->_bfd_coff_slurp_symbol_table) (abfd))

#define bfd_coff_symname_in_debug(abfd, sym)\
  ((coff_backend_info (abfd)->_bfd_coff_symname_in_debug) (abfd, sym))

#define bfd_coff_force_symnames_in_strings(abfd)\
  (coff_backend_info (abfd)->_bfd_coff_force_symnames_in_strings)

#define bfd_coff_debug_string_prefix_length(abfd)\
  (coff_backend_info (abfd)->_bfd_coff_debug_string_prefix_length)

#define bfd_coff_print_aux(abfd, file, base, symbol, aux, indaux)\
  ((coff_backend_info (abfd)->_bfd_coff_print_aux)\
   (abfd, file, base, symbol, aux, indaux))

#define bfd_coff_reloc16_extra_cases(abfd, link_info, link_order,\
                                     reloc, data, src_ptr, dst_ptr)\
  ((coff_backend_info (abfd)->_bfd_coff_reloc16_extra_cases)\
   (abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr))

#define bfd_coff_reloc16_estimate(abfd, section, reloc, shrink, link_info)\
  ((coff_backend_info (abfd)->_bfd_coff_reloc16_estimate)\
   (abfd, section, reloc, shrink, link_info))

#define bfd_coff_classify_symbol(abfd, sym)\
  ((coff_backend_info (abfd)->_bfd_coff_classify_symbol)\
   (abfd, sym))

#define bfd_coff_compute_section_file_positions(abfd)\
  ((coff_backend_info (abfd)->_bfd_coff_compute_section_file_positions)\
   (abfd))

#define bfd_coff_start_final_link(obfd, info)\
  ((coff_backend_info (obfd)->_bfd_coff_start_final_link)\
   (obfd, info))
#define bfd_coff_relocate_section(obfd,info,ibfd,o,con,rel,isyms,secs)\
  ((coff_backend_info (ibfd)->_bfd_coff_relocate_section)\
   (obfd, info, ibfd, o, con, rel, isyms, secs))
#define bfd_coff_rtype_to_howto(abfd, sec, rel, h, sym, addendp)\
  ((coff_backend_info (abfd)->_bfd_coff_rtype_to_howto)\
   (abfd, sec, rel, h, sym, addendp))
#define bfd_coff_adjust_symndx(obfd, info, ibfd, sec, rel, adjustedp)\
  ((coff_backend_info (abfd)->_bfd_coff_adjust_symndx)\
   (obfd, info, ibfd, sec, rel, adjustedp))
#define bfd_coff_link_add_one_symbol(info, abfd, name, flags, section,\
                                     value, string, cp, coll, hashp)\
  ((coff_backend_info (abfd)->_bfd_coff_link_add_one_symbol)\
   (info, abfd, name, flags, section, value, string, cp, coll, hashp))

#define bfd_coff_link_output_has_begun(a,p) \
  ((coff_backend_info (a)->_bfd_coff_link_output_has_begun) (a, p))
#define bfd_coff_final_link_postscript(a,p) \
  ((coff_backend_info (a)->_bfd_coff_final_link_postscript) (a, p))

#define bfd_coff_have_print_pdata(a) \
  (coff_backend_info (a)->_bfd_coff_print_pdata)
#define bfd_coff_print_pdata(a,p) \
  ((coff_backend_info (a)->_bfd_coff_print_pdata) (a, p))

/* Macro: Returns true if the bfd is a PE executable as opposed to a
   PE object file.  */
#define bfd_pei_p(abfd) \
  (CONST_STRNEQ ((abfd)->xvec->name, "pei-"))
#ifdef __cplusplus
}
#endif
#endif