bfd/coff-bfd.h

   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
  27 struct 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
  42 struct 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
  79 struct internal_syment;
  80 union internal_auxent;
  81
  82 extern bfd_boolean bfd_coff_get_syment
  83   (bfd *, struct bfd_symbol *, struct internal_syment *);
  84
  85 extern bfd_boolean bfd_coff_get_auxent
  86   (bfd *, struct bfd_symbol *, int, union internal_auxent *);