bfd/libcoff-in.h

   1 /* BFD COFF object file private structure.
   2    Copyright (C) 1990, 1991, 1992, 1993, 1994 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 #include "bfdlink.h"
  22
  23 /* Object file tdata; access macros */
  24
  25 #define coff_data(bfd)          ((bfd)->tdata.coff_obj_data)
  26 #define exec_hdr(bfd)           (coff_data(bfd)->hdr)
  27 #define obj_symbols(bfd)        (coff_data(bfd)->symbols)
  28 #define obj_sym_filepos(bfd)    (coff_data(bfd)->sym_filepos)
  29
  30 #define obj_relocbase(bfd)      (coff_data(bfd)->relocbase)
  31 #define obj_raw_syments(bfd)    (coff_data(bfd)->raw_syments)
  32 #define obj_raw_syment_count(bfd)       (coff_data(bfd)->raw_syment_count)
  33 #define obj_convert(bfd)        (coff_data(bfd)->conversion_table)
  34 #define obj_conv_table_size(bfd) (coff_data(bfd)->conv_table_size)
  35
  36 #define obj_coff_external_syms(bfd) (coff_data (bfd)->external_syms)
  37 #define obj_coff_strings(bfd)   (coff_data (bfd)->strings)
  38 #define obj_coff_sym_hashes(bfd) (coff_data (bfd)->sym_hashes)
  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   struct coff_ptr_struct *raw_syments;
  50   unsigned int raw_syment_count;
  51
  52   /* These are only valid once writing has begun */
  53   long int relocbase;
  54
  55   /* These members communicate important constants about the symbol table
  56      to GDB's symbol-reading code.  These `constants' unfortunately vary
  57      from coff implementation to implementation...  */
  58   unsigned local_n_btmask;
  59   unsigned local_n_btshft;
  60   unsigned local_n_tmask;
  61   unsigned local_n_tshift;
  62   unsigned local_symesz;
  63   unsigned local_auxesz;
  64   unsigned local_linesz;
  65
  66   /* Used by the COFF backend linker.  */
  67   PTR external_syms;
  68   char *strings;
  69   struct coff_link_hash_entry **sym_hashes;
  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 /* COFF linker hash table entries.  */
  77
  78 struct coff_link_hash_entry
  79 {
  80   struct bfd_link_hash_entry root;
  81
  82   /* Symbol index in output file.  Set to -1 initially.  Set to -2 if
  83      there is a reloc against this symbol.  */
  84   long indx;
  85
  86   /* Symbol type.  */
  87   unsigned short type;
  88
  89   /* Symbol class.  */
  90   unsigned char class;
  91
  92   /* Number of auxiliary entries.  */
  93   char numaux;
  94
  95   /* BFD to take auxiliary entries from.  */
  96   bfd *auxbfd;
  97
  98   /* Pointer to array of auxiliary entries, if any.  */
  99   union internal_auxent *aux;
 100 };
 101
 102 /* COFF linker hash table.  */
 103
 104 struct coff_link_hash_table
 105 {
 106   struct bfd_link_hash_table root;
 107 };
 108
 109 /* Look up an entry in a COFF linker hash table.  */
 110
 111 #define coff_link_hash_lookup(table, string, create, copy, follow)      \
 112   ((struct coff_link_hash_entry *)                                      \
 113    bfd_link_hash_lookup (&(table)->root, (string), (create),            \
 114                          (copy), (follow)))
 115
 116 /* Traverse a COFF linker hash table.  */
 117
 118 #define coff_link_hash_traverse(table, func, info)                      \
 119   (bfd_link_hash_traverse                                               \
 120    (&(table)->root,                                                     \
 121     (boolean (*) PARAMS ((struct bfd_link_hash_entry *, PTR))) (func),  \
 122     (info)))
 123
 124 /* Get the COFF linker hash table from a link_info structure.  */
 125
 126 #define coff_hash_table(p) ((struct coff_link_hash_table *) ((p)->hash))
 127
 128 /* Functions in coffgen.c.  */
 129 extern const bfd_target *coff_object_p PARAMS ((bfd *));
 130 extern struct sec *coff_section_from_bfd_index PARAMS ((bfd *, int));
 131 extern long coff_get_symtab_upper_bound PARAMS ((bfd *));
 132 extern long coff_get_symtab PARAMS ((bfd *, asymbol **));
 133 extern int coff_count_linenumbers PARAMS ((bfd *));
 134 extern struct coff_symbol_struct *coff_symbol_from PARAMS ((bfd *, asymbol *));
 135 extern boolean coff_renumber_symbols PARAMS ((bfd *));
 136 extern void coff_mangle_symbols PARAMS ((bfd *));
 137 extern boolean coff_write_symbols PARAMS ((bfd *));
 138 extern boolean coff_write_linenumbers PARAMS ((bfd *));
 139 extern alent *coff_get_lineno PARAMS ((bfd *, asymbol *));
 140 extern asymbol *coff_section_symbol PARAMS ((bfd *, char *));
 141 extern struct coff_ptr_struct *coff_get_normalized_symtab PARAMS ((bfd *));
 142 extern long coff_get_reloc_upper_bound PARAMS ((bfd *, sec_ptr));
 143 extern asymbol *coff_make_empty_symbol PARAMS ((bfd *));
 144 extern void coff_print_symbol PARAMS ((bfd *, PTR filep, asymbol *,
 145                                        bfd_print_symbol_type how));
 146 extern void coff_get_symbol_info PARAMS ((bfd *, asymbol *,
 147                                           symbol_info *ret));
 148 extern asymbol *coff_bfd_make_debug_symbol PARAMS ((bfd *, PTR,
 149                                                     unsigned long));
 150 extern boolean coff_find_nearest_line PARAMS ((bfd *,
 151                                                asection *,
 152                                                asymbol **,
 153                                                bfd_vma offset,
 154                                                CONST char **filename_ptr,
 155                                                CONST char **functionname_ptr,
 156                                                unsigned int *line_ptr));
 157 extern int coff_sizeof_headers PARAMS ((bfd *, boolean reloc));
 158 extern boolean bfd_coff_reloc16_relax_section
 159   PARAMS ((bfd *, asection *, struct bfd_link_info *, boolean *));
 160 extern bfd_byte *bfd_coff_reloc16_get_relocated_section_contents
 161   PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_order *,
 162            bfd_byte *, boolean relocateable, asymbol **));
 163 extern bfd_vma bfd_coff_reloc16_get_value PARAMS ((arelent *,
 164                                                    struct bfd_link_info *,
 165                                                    asection *));
 166 extern void bfd_perform_slip PARAMS ((bfd *abfd, unsigned int slip,
 167                                       asection *input_section,
 168                                       bfd_vma val));
 169
 170 /* Functions in cofflink.c.  */
 171
 172 extern struct bfd_link_hash_table *_bfd_coff_link_hash_table_create
 173   PARAMS ((bfd *));
 174 extern boolean _bfd_coff_link_add_symbols
 175   PARAMS ((bfd *, struct bfd_link_info *));
 176 extern boolean _bfd_coff_final_link
 177   PARAMS ((bfd *, struct bfd_link_info *));
 178
 179 /* And more taken from the source .. */
 180