1/* BFD COFF interfaces used outside of BFD.
2   Copyright (C) 1990-2017 Free Software Foundation, Inc.
3   Written by Cygnus Support.
4
5   This file is part of BFD, the Binary File Descriptor library.
6
7   This program is free software; you can redistribute it and/or modify
8   it under the terms of the GNU General Public License as published by
9   the Free Software Foundation; either version 3 of the License, or
10   (at your option) any later version.
11
12   This program is distributed in the hope that it will be useful,
13   but WITHOUT ANY WARRANTY; without even the implied warranty of
14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15   GNU General Public License for more details.
16
17   You should have received a copy of the GNU General Public License
18   along with this program; if not, write to the Free Software
19   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20   MA 02110-1301, USA.  */
21
22/* This structure is used for a comdat section, as in PE.  A comdat
23   section is associated with a particular symbol.  When the linker
24   sees a comdat section, it keeps only one of the sections with a
25   given name and associated with a given symbol.  */
26
27struct coff_comdat_info
28{
29  /* The name of the symbol associated with a comdat section.  */
30  const char *name;
31
32  /* The local symbol table index of the symbol associated with a
33     comdat section.  This is only meaningful to the object file format
34     specific code; it is not an index into the list returned by
35     bfd_canonicalize_symtab.  */
36  long symbol;
37};
38
39/* The used_by_bfd field of a section may be set to a pointer to this
40   structure.  */
41
42struct coff_section_tdata
43{
44  /* The relocs, swapped into COFF internal form.  This may be NULL.  */
45  struct internal_reloc *relocs;
46  /* If this is TRUE, the relocs entry may not be freed.  */
47  bfd_boolean keep_relocs;
48  /* The section contents.  This may be NULL.  */
49  bfd_byte *contents;
50  /* If this is TRUE, the contents entry may not be freed.  */
51  bfd_boolean keep_contents;
52  /* Information cached by coff_find_nearest_line.  */
53  bfd_vma offset;
54  unsigned int i;
55  const char *function;
56  /* Optional information about a COMDAT entry; NULL if not COMDAT. */
57  struct coff_comdat_info *comdat;
58  int line_base;
59  /* A pointer used for .stab linking optimizations.  */
60  void * stab_info;
61  /* Available for individual backends.  */
62  void * tdata;
63};
64
65/* An accessor macro for the coff_section_tdata structure.  */
66#define coff_section_data(abfd, sec) \
67  ((struct coff_section_tdata *) (sec)->used_by_bfd)
68
69#define bfd_coff_get_comdat_section(abfd, sec)		\
70  ((bfd_get_flavour (abfd) == bfd_target_coff_flavour	\
71    && coff_section_data (abfd, sec) != NULL)		\
72   ? coff_section_data (abfd, sec)->comdat : NULL)
73
74#define coff_symbol_from(symbol)			\
75  ((bfd_family_coff (bfd_asymbol_bfd (symbol))		\
76    && bfd_asymbol_bfd (symbol)->tdata.coff_obj_data)	\
77   ? (coff_symbol_type *) (symbol) : NULL)
78
79struct internal_syment;
80union internal_auxent;
81
82extern bfd_boolean bfd_coff_get_syment
83  (bfd *, struct bfd_symbol *, struct internal_syment *);
84
85extern bfd_boolean bfd_coff_get_auxent
86  (bfd *, struct bfd_symbol *, int, union internal_auxent *);
87