bfd/libcoff.h

   1 /* BFD COFF object file private structure.
   2    Copyright (C) 1990-1991 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 2 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., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  20
  21
  22 /* Object file tdata; access macros */
  23
  24 #define coff_data(bfd)          ((coff_data_type *) ((bfd)->tdata))
  25 #define exec_hdr(bfd)           (coff_data(bfd)->hdr)
  26 #define obj_symbols(bfd)        (coff_data(bfd)->symbols)
  27 #define obj_sym_filepos(bfd)    (coff_data(bfd)->sym_filepos)
  28
  29 #define obj_relocbase(bfd)      (coff_data(bfd)->relocbase)
  30 #define obj_raw_syments(bfd)    (coff_data(bfd)->raw_syments)
  31 #define obj_convert(bfd)        (coff_data(bfd)->conversion_table)
  32 #if CFILE_STUFF
  33 #define obj_symbol_slew(bfd)    (coff_data(bfd)->symbol_index_slew)
  34 #else
  35 #define obj_symbol_slew(bfd) 0
  36 #endif
  37
  38
  39 /* `Tdata' information kept for COFF files.  */
  40
  41 typedef struct coff_tdata
  42 {
  43   struct   coff_symbol_struct *symbols; /* symtab for input bfd */
  44   unsigned int *conversion_table;
  45   file_ptr sym_filepos;
  46
  47   long symbol_index_slew;       /* used during read to mark whether a
  48                                    C_FILE symbol as been added. */
  49
  50   struct coff_ptr_struct *raw_syments;
  51   struct lineno *raw_linenos;
  52   unsigned int raw_syment_count;
  53   unsigned short flags;
  54
  55   /* These are only valid once writing has begun */
  56   long int relocbase;
  57
  58   /* These members communicate important constants about the symbol table
  59      to GDB's symbol-reading code.  These `constants' unfortunately vary
  60      from coff implementation to implementation...  */
  61   unsigned local_n_btmask;
  62   unsigned local_n_btshft;
  63   unsigned local_n_tmask;
  64   unsigned local_n_tshift;
  65   unsigned local_symesz;
  66   unsigned local_auxesz;
  67   unsigned local_linesz;
  68 } coff_data_type;
  69
  70 /* We take the address of the first element of a asymbol to ensure that the
  71  * macro is only ever applied to an asymbol.  */
  72 #define coffsymbol(asymbol) ((coff_symbol_type *)(&((asymbol)->the_bfd)))
  73
  74
  75
  76 /* And more taken from the source .. */
  77
  78 {
  79
  80         /* Remembers the offset from the first symbol in the file for
  81           this symbol. Generated by coff_renumber_symbols. */
  82 unsigned int offset;
  83
  84         /* Should the tag field of this symbol be renumbered.
  85           Created by coff_pointerize_aux. */
  86 char fix_tag;
  87
  88         /* Should the endidx field of this symbol be renumbered.
  89           Created by coff_pointerize_aux. */
  90 char fix_end;
  91
  92         /* The container for the symbol structure as read and translated
  93            from the file. */
  94
  95 union {
  96    union internal_auxent auxent;
  97    struct internal_syment syment;
  98  } u;
  99 } combined_entry_type;
 100
 101
 102  /* Each canonical asymbol really looks like this: */
 103
 104 typedef struct coff_symbol_struct
 105 {
 106     /* The actual symbol which the rest of BFD works with */
 107 asymbol symbol;
 108
 109     /* A pointer to the hidden information for this symbol */
 110 combined_entry_type *native;
 111
 112     /* A pointer to the linenumber information for this symbol */
 113 struct lineno_cache_entry *lineno;
 114
 115 } coff_symbol_type;