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)          ((bfd)->tdata.coff_obj_data)
  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 #define obj_conv_table_size(bfd) (coff_data(bfd)->conv_table_size)
  33 #if CFILE_STUFF
  34 #define obj_symbol_slew(bfd)    (coff_data(bfd)->symbol_index_slew)
  35 #else
  36 #define obj_symbol_slew(bfd) 0
  37 #endif
  38
  39
  40 /* `Tdata' information kept for COFF files.  */
  41
  42 typedef struct coff_tdata
  43 {
  44   struct   coff_symbol_struct *symbols; /* symtab for input bfd */
  45   unsigned int *conversion_table;
  46   int conv_table_size;
  47   file_ptr sym_filepos;
  48
  49   long symbol_index_slew;       /* used during read to mark whether a
  50                                    C_FILE symbol as been added. */
  51
  52   struct coff_ptr_struct *raw_syments;
  53   struct lineno *raw_linenos;
  54   unsigned int raw_syment_count;
  55   unsigned short flags;
  56
  57   /* These are only valid once writing has begun */
  58   long int relocbase;
  59
  60   /* These members communicate important constants about the symbol table
  61      to GDB's symbol-reading code.  These `constants' unfortunately vary
  62      from coff implementation to implementation...  */
  63   unsigned local_n_btmask;
  64   unsigned local_n_btshft;
  65   unsigned local_n_tmask;
  66   unsigned local_n_tshift;
  67   unsigned local_symesz;
  68   unsigned local_auxesz;
  69   unsigned local_linesz;
  70 } coff_data_type;
  71
  72 /* We take the address of the first element of a asymbol to ensure that the
  73  * macro is only ever applied to an asymbol.  */
  74 #define coffsymbol(asymbol) ((coff_symbol_type *)(&((asymbol)->the_bfd)))
  75
  76
  77
  78 /* And more taken from the source .. */
  79
  80 typedef struct coff_ptr_struct
  81 {
  82
  83         /* Remembers the offset from the first symbol in the file for
  84           this symbol. Generated by coff_renumber_symbols. */
  85 unsigned int offset;
  86
  87         /* Should the tag field of this symbol be renumbered.
  88           Created by coff_pointerize_aux. */
  89 char fix_tag;
  90
  91         /* Should the endidx field of this symbol be renumbered.
  92           Created by coff_pointerize_aux. */
  93 char fix_end;
  94
  95         /* The container for the symbol structure as read and translated
  96            from the file. */
  97
  98 union {
  99    union internal_auxent auxent;
 100    struct internal_syment syment;
 101  } u;
 102 } combined_entry_type;
 103
 104
 105  /* Each canonical asymbol really looks like this: */
 106
 107 typedef struct coff_symbol_struct
 108 {
 109     /* The actual symbol which the rest of BFD works with */
 110 asymbol symbol;
 111
 112     /* A pointer to the hidden information for this symbol */
 113 combined_entry_type *native;
 114
 115     /* A pointer to the linenumber information for this symbol */
 116 struct lineno_cache_entry *lineno;
 117
 118     /* Have the line numbers been relocated yet ? */
 119 boolean done_lineno;
 120 } coff_symbol_type;
 121 typedef struct {
 122   void (*_bfd_coff_swap_aux_in) PARAMS ((
 123        bfd            *abfd ,
 124        PTR             ext,
 125        int             type,
 126        int             class ,
 127        PTR             in));
 128
 129   void (*_bfd_coff_swap_sym_in) PARAMS ((
 130        bfd            *abfd ,
 131        PTR             ext,
 132        PTR             in));
 133
 134   void (*_bfd_coff_swap_lineno_in) PARAMS ((
 135        bfd            *abfd,
 136        PTR            ext,
 137        PTR             in));
 138
 139  unsigned int (*_bfd_coff_swap_aux_out) PARAMS ((
 140        bfd      *abfd,
 141        PTR      in,
 142        int      type,
 143        int      class,
 144        PTR      ext));
 145
 146  unsigned int (*_bfd_coff_swap_sym_out) PARAMS ((
 147       bfd      *abfd,
 148       PTR       in,
 149       PTR       ext));
 150
 151  unsigned int (*_bfd_coff_swap_lineno_out) PARAMS ((
 152         bfd     *abfd,
 153         PTR     in,
 154         PTR     ext));
 155
 156  unsigned int (*_bfd_coff_swap_reloc_out) PARAMS ((
 157         bfd     *abfd,
 158         PTR     src,
 159         PTR     dst));
 160
 161  unsigned int (*_bfd_coff_swap_filehdr_out) PARAMS ((
 162         bfd     *abfd,
 163         PTR     in,
 164         PTR     out));
 165
 166  unsigned int (*_bfd_coff_swap_aouthdr_out) PARAMS ((
 167         bfd     *abfd,
 168         PTR     in,
 169         PTR     out));
 170
 171  unsigned int (*_bfd_coff_swap_scnhdr_out) PARAMS ((
 172         bfd     *abfd,
 173         PTR     in,
 174         PTR     out));
 175
 176 } bfd_coff_backend_data;
 177
 178 extern bfd_coff_backend_data bfd_coff_std_swap_table;
 179
 180 #define coff_backend_info(abfd) ((bfd_coff_backend_data *) (abfd)->xvec->backend_data)
 181
 182 #define bfd_coff_swap_aux_in(a,e,t,c,i) \
 183         ((coff_backend_info (a)->_bfd_coff_swap_aux_in) (a,e,t,c,i))
 184
 185 #define bfd_coff_swap_sym_in(a,e,i) \
 186         ((coff_backend_info (a)->_bfd_coff_swap_sym_in) (a,e,i))
 187
 188 #define bfd_coff_swap_lineno_in(a,e,i) \
 189         ((coff_backend_info ( a)->_bfd_coff_swap_lineno_in) (a,e,i))
 190
 191 #define bfd_coff_swap_reloc_out(abfd, i, o) \
 192         ((coff_backend_info (abfd)->_bfd_coff_swap_reloc_out) (abfd, i, o))
 193
 194 #define bfd_coff_swap_lineno_out(abfd, i, o) \
 195         ((coff_backend_info (abfd)->_bfd_coff_swap_lineno_out) (abfd, i, o))
 196
 197 #define bfd_coff_swap_aux_out(abfd, i, t,c,o) \
 198         ((coff_backend_info (abfd)->_bfd_coff_swap_aux_out) (abfd, i,t,c, o))
 199
 200 #define bfd_coff_swap_sym_out(abfd, i,o) \
 201         ((coff_backend_info (abfd)->_bfd_coff_swap_sym_out) (abfd, i, o))
 202
 203 #define bfd_coff_swap_scnhdr_out(abfd, i,o) \
 204         ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_out) (abfd, i, o))
 205
 206 #define bfd_coff_swap_filehdr_out(abfd, i,o) \
 207         ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_out) (abfd, i, o))
 208
 209 #define bfd_coff_swap_aouthdr_out(abfd, i,o) \
 210         ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_out) (abfd, i, o))
 211