bfd/libcoff-in.h

   1 /* BFD COFF object file private structure.
   2    Copyright (C) 1990, 91, 92, 93, 94, 1995 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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_pe(bfd)             (coff_data(bfd)->pe)
  28 #define obj_symbols(bfd)        (coff_data(bfd)->symbols)
  29 #define obj_sym_filepos(bfd)    (coff_data(bfd)->sym_filepos)
  30
  31 #define obj_relocbase(bfd)      (coff_data(bfd)->relocbase)
  32 #define obj_raw_syments(bfd)    (coff_data(bfd)->raw_syments)
  33 #define obj_raw_syment_count(bfd)       (coff_data(bfd)->raw_syment_count)
  34 #define obj_convert(bfd)        (coff_data(bfd)->conversion_table)
  35 #define obj_conv_table_size(bfd) (coff_data(bfd)->conv_table_size)
  36
  37 #define obj_coff_external_syms(bfd) (coff_data (bfd)->external_syms)
  38 #define obj_coff_keep_syms(bfd) (coff_data (bfd)->keep_syms)
  39 #define obj_coff_strings(bfd)   (coff_data (bfd)->strings)
  40 #define obj_coff_keep_strings(bfd) (coff_data (bfd)->keep_strings)
  41 #define obj_coff_sym_hashes(bfd) (coff_data (bfd)->sym_hashes)
  42
  43 /* `Tdata' information kept for COFF files.  */
  44
  45 typedef struct coff_tdata
  46 {
  47   struct   coff_symbol_struct *symbols; /* symtab for input bfd */
  48   unsigned int *conversion_table;
  49   int conv_table_size;
  50   file_ptr sym_filepos;
  51
  52   struct coff_ptr_struct *raw_syments;
  53   unsigned int raw_syment_count;
  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
  69   /* The unswapped external symbols.  May be NULL.  Read by
  70      _bfd_coff_get_external_symbols.  */
  71   PTR external_syms;
  72   /* If this is true, the external_syms may not be freed.  */
  73   boolean keep_syms;
  74
  75   /* The string table.  May be NULL.  Read by
  76      _bfd_coff_read_string_table.  */
  77   char *strings;
  78   /* If this is true, the strings may not be freed.  */
  79   boolean keep_strings;
  80
  81   /* is this a PE format coff file */
  82   int pe;
  83   /* Used by the COFF backend linker.  */
  84   struct coff_link_hash_entry **sym_hashes;
  85
  86   struct bfd_link_info *link_info;
  87 } coff_data_type;
  88
  89 /* Tdata for pe image files. */
  90 typedef struct pe_tdata
  91 {
  92   coff_data_type coff;
  93   struct internal_extra_pe_aouthdr pe_opthdr;
  94   int dll;
  95   int has_reloc_section;
  96   boolean (*in_reloc_p) PARAMS((bfd *, reloc_howto_type *));
  97 } pe_data_type;
  98
  99 #define pe_data(bfd)            ((bfd)->tdata.pe_obj_data)
 100
 101 /* Tdata for XCOFF files.  */
 102
 103 struct xcoff_tdata
 104 {
 105   /* Basic COFF information.  */
 106   coff_data_type coff;
 107
 108   /* TOC value.  */
 109   bfd_vma toc;
 110
 111   /* .text alignment from optional header.  */
 112   int text_align_power;
 113
 114   /* .data alignment from optional header.  */
 115   int data_align_power;
 116
 117   /* modtype from optional header.  */
 118   short modtype;
 119
 120   /* cputype from optional header.  */
 121   short cputype;
 122
 123   /* maxdata from optional header.  */
 124   bfd_size_type maxdata;
 125
 126   /* maxstack from optional header.  */
 127   bfd_size_type maxstack;
 128 };
 129
 130 #define xcoff_data(abfd) ((abfd)->tdata.xcoff_obj_data)
 131
 132 /* We take the address of the first element of a asymbol to ensure that the
 133  * macro is only ever applied to an asymbol.  */
 134 #define coffsymbol(asymbol) ((coff_symbol_type *)(&((asymbol)->the_bfd)))
 135
 136 /* The used_by_bfd field of a section may be set to a pointer to this
 137    structure.  */
 138
 139 struct coff_section_tdata
 140 {
 141   /* The relocs, swapped into COFF internal form.  This may be NULL.  */
 142   struct internal_reloc *relocs;
 143   /* If this is true, the relocs entry may not be freed.  */
 144   boolean keep_relocs;
 145   /* The section contents.  This may be NULL.  */
 146   bfd_byte *contents;
 147   /* If this is true, the contents entry may not be freed.  */
 148   boolean keep_contents;
 149   /* Information cached by coff_find_nearest_line.  */
 150   bfd_vma offset;
 151   unsigned int i;
 152   const char *function;
 153   int line_base;
 154   /* Available for individual backends.  */
 155   PTR tdata;
 156 };
 157
 158 /* An accessor macro for the coff_section_tdata structure.  */
 159 #define coff_section_data(abfd, sec) \
 160   ((struct coff_section_tdata *) (sec)->used_by_bfd)
 161
 162 /* COFF linker hash table entries.  */
 163
 164 struct coff_link_hash_entry
 165 {
 166   struct bfd_link_hash_entry root;
 167
 168   /* Symbol index in output file.  Set to -1 initially.  Set to -2 if
 169      there is a reloc against this symbol.  */
 170   long indx;
 171
 172   /* Symbol type.  */
 173   unsigned short type;
 174
 175   /* Symbol class.  */
 176   unsigned char class;
 177
 178   /* Number of auxiliary entries.  */
 179   char numaux;
 180
 181   /* BFD to take auxiliary entries from.  */
 182   bfd *auxbfd;
 183
 184   /* Pointer to array of auxiliary entries, if any.  */
 185   union internal_auxent *aux;
 186 };
 187
 188 /* COFF linker hash table.  */
 189
 190 struct coff_link_hash_table
 191 {
 192   struct bfd_link_hash_table root;
 193 };
 194
 195 /* Look up an entry in a COFF linker hash table.  */
 196
 197 #define coff_link_hash_lookup(table, string, create, copy, follow)      \
 198   ((struct coff_link_hash_entry *)                                      \
 199    bfd_link_hash_lookup (&(table)->root, (string), (create),            \
 200                          (copy), (follow)))
 201
 202 /* Traverse a COFF linker hash table.  */
 203
 204 #define coff_link_hash_traverse(table, func, info)                      \
 205   (bfd_link_hash_traverse                                               \
 206    (&(table)->root,                                                     \
 207     (boolean (*) PARAMS ((struct bfd_link_hash_entry *, PTR))) (func),  \
 208     (info)))
 209
 210 /* Get the COFF linker hash table from a link_info structure.  */
 211
 212 #define coff_hash_table(p) ((struct coff_link_hash_table *) ((p)->hash))
 213
 214 /* Functions in coffgen.c.  */
 215 extern const bfd_target *coff_object_p PARAMS ((bfd *));
 216 extern struct sec *coff_section_from_bfd_index PARAMS ((bfd *, int));
 217 extern long coff_get_symtab_upper_bound PARAMS ((bfd *));
 218 extern long coff_get_symtab PARAMS ((bfd *, asymbol **));
 219 extern int coff_count_linenumbers PARAMS ((bfd *));
 220 extern struct coff_symbol_struct *coff_symbol_from PARAMS ((bfd *, asymbol *));
 221 extern boolean coff_renumber_symbols PARAMS ((bfd *, int *));
 222 extern void coff_mangle_symbols PARAMS ((bfd *));
 223 extern boolean coff_write_symbols PARAMS ((bfd *));
 224 extern boolean coff_write_linenumbers PARAMS ((bfd *));
 225 extern alent *coff_get_lineno PARAMS ((bfd *, asymbol *));
 226 extern asymbol *coff_section_symbol PARAMS ((bfd *, char *));
 227 extern boolean _bfd_coff_get_external_symbols PARAMS ((bfd *));
 228 extern const char *_bfd_coff_read_string_table PARAMS ((bfd *));
 229 extern boolean _bfd_coff_free_symbols PARAMS ((bfd *));
 230 extern struct coff_ptr_struct *coff_get_normalized_symtab PARAMS ((bfd *));
 231 extern long coff_get_reloc_upper_bound PARAMS ((bfd *, sec_ptr));
 232 extern asymbol *coff_make_empty_symbol PARAMS ((bfd *));
 233 extern void coff_print_symbol PARAMS ((bfd *, PTR filep, asymbol *,
 234                                        bfd_print_symbol_type how));
 235 extern void coff_get_symbol_info PARAMS ((bfd *, asymbol *,
 236                                           symbol_info *ret));
 237 extern asymbol *coff_bfd_make_debug_symbol PARAMS ((bfd *, PTR,
 238                                                     unsigned long));
 239 extern boolean coff_find_nearest_line PARAMS ((bfd *,
 240                                                asection *,
 241                                                asymbol **,
 242                                                bfd_vma offset,
 243                                                CONST char **filename_ptr,
 244                                                CONST char **functionname_ptr,
 245                                                unsigned int *line_ptr));
 246 extern int coff_sizeof_headers PARAMS ((bfd *, boolean reloc));
 247 extern boolean bfd_coff_reloc16_relax_section
 248   PARAMS ((bfd *, asection *, struct bfd_link_info *, boolean *));
 249 extern bfd_byte *bfd_coff_reloc16_get_relocated_section_contents
 250   PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_order *,
 251            bfd_byte *, boolean relocateable, asymbol **));
 252 extern bfd_vma bfd_coff_reloc16_get_value PARAMS ((arelent *,
 253                                                    struct bfd_link_info *,
 254                                                    asection *));
 255 extern void bfd_perform_slip PARAMS ((bfd *abfd, unsigned int slip,
 256                                       asection *input_section,
 257                                       bfd_vma val));
 258
 259 /* Functions in cofflink.c.  */
 260
 261 extern struct bfd_hash_entry *_bfd_coff_link_hash_newfunc
 262   PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
 263 extern boolean _bfd_coff_link_hash_table_init
 264   PARAMS ((struct coff_link_hash_table *, bfd *,
 265            struct bfd_hash_entry *(*) (struct bfd_hash_entry *,
 266                                        struct bfd_hash_table *,
 267                                        const char *)));
 268 extern struct bfd_link_hash_table *_bfd_coff_link_hash_table_create
 269   PARAMS ((bfd *));
 270 extern const char *_bfd_coff_internal_syment_name
 271   PARAMS ((bfd *, const struct internal_syment *, char *));
 272 extern boolean _bfd_coff_link_add_symbols
 273   PARAMS ((bfd *, struct bfd_link_info *));
 274 extern boolean _bfd_coff_final_link
 275   PARAMS ((bfd *, struct bfd_link_info *));
 276 extern struct internal_reloc *_bfd_coff_read_internal_relocs
 277   PARAMS ((bfd *, asection *, boolean, bfd_byte *, boolean,
 278            struct internal_reloc *));
 279 extern boolean _bfd_coff_generic_relocate_section
 280   PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
 281            struct internal_reloc *, struct internal_syment *, asection **));
 282
 283 /* And more taken from the source .. */
 284