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   /* Used by the XCOFF backend linker.  */
 130   asection **csects;
 131   unsigned long *debug_indices;
 132   unsigned int import_file_id;
 133 };
 134
 135 #define xcoff_data(abfd) ((abfd)->tdata.xcoff_obj_data)
 136
 137 /* We take the address of the first element of a asymbol to ensure that the
 138  * macro is only ever applied to an asymbol.  */
 139 #define coffsymbol(asymbol) ((coff_symbol_type *)(&((asymbol)->the_bfd)))
 140
 141 /* The used_by_bfd field of a section may be set to a pointer to this
 142    structure.  */
 143
 144 struct coff_section_tdata
 145 {
 146   /* The relocs, swapped into COFF internal form.  This may be NULL.  */
 147   struct internal_reloc *relocs;
 148   /* If this is true, the relocs entry may not be freed.  */
 149   boolean keep_relocs;
 150   /* The section contents.  This may be NULL.  */
 151   bfd_byte *contents;
 152   /* If this is true, the contents entry may not be freed.  */
 153   boolean keep_contents;
 154   /* Information cached by coff_find_nearest_line.  */
 155   bfd_vma offset;
 156   unsigned int i;
 157   const char *function;
 158   int line_base;
 159   /* Available for individual backends.  */
 160   PTR tdata;
 161 };
 162
 163 /* An accessor macro for the coff_section_tdata structure.  */
 164 #define coff_section_data(abfd, sec) \
 165   ((struct coff_section_tdata *) (sec)->used_by_bfd)
 166
 167 /* Tdata for sections in XCOFF files.  This is used by the linker.  */
 168
 169 struct xcoff_section_tdata
 170 {
 171   /* Used for XCOFF csects created by the linker; points to the real
 172      XCOFF section which contains this csect.  */
 173   asection *enclosing;
 174   /* The lineno_count field for the enclosing section, because we are
 175      going to clobber it there.  */
 176   unsigned int lineno_count;
 177   /* The first and one past the last symbol indices for symbols used
 178      by this csect.  */
 179   unsigned long first_symndx;
 180   unsigned long last_symndx;
 181   /* The number of .loader relocs in this csect.  */
 182   size_t ldrel_count;
 183 };
 184
 185 /* An accessor macro the xcoff_section_tdata structure.  */
 186 #define xcoff_section_data(abfd, sec) \
 187   ((struct xcoff_section_tdata *) coff_section_data ((abfd), (sec))->tdata)
 188
 189 /* COFF linker hash table entries.  */
 190
 191 struct coff_link_hash_entry
 192 {
 193   struct bfd_link_hash_entry root;
 194
 195   /* Symbol index in output file.  Set to -1 initially.  Set to -2 if
 196      there is a reloc against this symbol.  */
 197   long indx;
 198
 199   /* Symbol type.  */
 200   unsigned short type;
 201
 202   /* Symbol class.  */
 203   unsigned char class;
 204
 205   /* Number of auxiliary entries.  */
 206   char numaux;
 207
 208   /* BFD to take auxiliary entries from.  */
 209   bfd *auxbfd;
 210
 211   /* Pointer to array of auxiliary entries, if any.  */
 212   union internal_auxent *aux;
 213 };
 214
 215 /* COFF linker hash table.  */
 216
 217 struct coff_link_hash_table
 218 {
 219   struct bfd_link_hash_table root;
 220 };
 221
 222 /* Look up an entry in a COFF linker hash table.  */
 223
 224 #define coff_link_hash_lookup(table, string, create, copy, follow)      \
 225   ((struct coff_link_hash_entry *)                                      \
 226    bfd_link_hash_lookup (&(table)->root, (string), (create),            \
 227                          (copy), (follow)))
 228
 229 /* Traverse a COFF linker hash table.  */
 230
 231 #define coff_link_hash_traverse(table, func, info)                      \
 232   (bfd_link_hash_traverse                                               \
 233    (&(table)->root,                                                     \
 234     (boolean (*) PARAMS ((struct bfd_link_hash_entry *, PTR))) (func),  \
 235     (info)))
 236
 237 /* Get the COFF linker hash table from a link_info structure.  */
 238
 239 #define coff_hash_table(p) ((struct coff_link_hash_table *) ((p)->hash))
 240
 241 /* Functions in coffgen.c.  */
 242 extern const bfd_target *coff_object_p PARAMS ((bfd *));
 243 extern struct sec *coff_section_from_bfd_index PARAMS ((bfd *, int));
 244 extern long coff_get_symtab_upper_bound PARAMS ((bfd *));
 245 extern long coff_get_symtab PARAMS ((bfd *, asymbol **));
 246 extern int coff_count_linenumbers PARAMS ((bfd *));
 247 extern struct coff_symbol_struct *coff_symbol_from PARAMS ((bfd *, asymbol *));
 248 extern boolean coff_renumber_symbols PARAMS ((bfd *, int *));
 249 extern void coff_mangle_symbols PARAMS ((bfd *));
 250 extern boolean coff_write_symbols PARAMS ((bfd *));
 251 extern boolean coff_write_linenumbers PARAMS ((bfd *));
 252 extern alent *coff_get_lineno PARAMS ((bfd *, asymbol *));
 253 extern asymbol *coff_section_symbol PARAMS ((bfd *, char *));
 254 extern boolean _bfd_coff_get_external_symbols PARAMS ((bfd *));
 255 extern const char *_bfd_coff_read_string_table PARAMS ((bfd *));
 256 extern boolean _bfd_coff_free_symbols PARAMS ((bfd *));
 257 extern struct coff_ptr_struct *coff_get_normalized_symtab PARAMS ((bfd *));
 258 extern long coff_get_reloc_upper_bound PARAMS ((bfd *, sec_ptr));
 259 extern asymbol *coff_make_empty_symbol PARAMS ((bfd *));
 260 extern void coff_print_symbol PARAMS ((bfd *, PTR filep, asymbol *,
 261                                        bfd_print_symbol_type how));
 262 extern void coff_get_symbol_info PARAMS ((bfd *, asymbol *,
 263                                           symbol_info *ret));
 264 extern asymbol *coff_bfd_make_debug_symbol PARAMS ((bfd *, PTR,
 265                                                     unsigned long));
 266 extern boolean coff_find_nearest_line PARAMS ((bfd *,
 267                                                asection *,
 268                                                asymbol **,
 269                                                bfd_vma offset,
 270                                                CONST char **filename_ptr,
 271                                                CONST char **functionname_ptr,
 272                                                unsigned int *line_ptr));
 273 extern int coff_sizeof_headers PARAMS ((bfd *, boolean reloc));
 274 extern boolean bfd_coff_reloc16_relax_section
 275   PARAMS ((bfd *, asection *, struct bfd_link_info *, boolean *));
 276 extern bfd_byte *bfd_coff_reloc16_get_relocated_section_contents
 277   PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_order *,
 278            bfd_byte *, boolean relocateable, asymbol **));
 279 extern bfd_vma bfd_coff_reloc16_get_value PARAMS ((arelent *,
 280                                                    struct bfd_link_info *,
 281                                                    asection *));
 282 extern void bfd_perform_slip PARAMS ((bfd *abfd, unsigned int slip,
 283                                       asection *input_section,
 284                                       bfd_vma val));
 285
 286 /* Functions in cofflink.c.  */
 287
 288 extern struct bfd_hash_entry *_bfd_coff_link_hash_newfunc
 289   PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
 290 extern boolean _bfd_coff_link_hash_table_init
 291   PARAMS ((struct coff_link_hash_table *, bfd *,
 292            struct bfd_hash_entry *(*) (struct bfd_hash_entry *,
 293                                        struct bfd_hash_table *,
 294                                        const char *)));
 295 extern struct bfd_link_hash_table *_bfd_coff_link_hash_table_create
 296   PARAMS ((bfd *));
 297 extern const char *_bfd_coff_internal_syment_name
 298   PARAMS ((bfd *, const struct internal_syment *, char *));
 299 extern boolean _bfd_coff_link_add_symbols
 300   PARAMS ((bfd *, struct bfd_link_info *));
 301 extern boolean _bfd_coff_final_link
 302   PARAMS ((bfd *, struct bfd_link_info *));
 303 extern struct internal_reloc *_bfd_coff_read_internal_relocs
 304   PARAMS ((bfd *, asection *, boolean, bfd_byte *, boolean,
 305            struct internal_reloc *));
 306 extern boolean _bfd_coff_generic_relocate_section
 307   PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
 308            struct internal_reloc *, struct internal_syment *, asection **));
 309
 310 /* Functions in xcofflink.c.  */
 311
 312 extern struct bfd_link_hash_table *_bfd_xcoff_bfd_link_hash_table_create
 313   PARAMS ((bfd *));
 314 extern boolean _bfd_xcoff_bfd_link_add_symbols
 315   PARAMS ((bfd *, struct bfd_link_info *));
 316 extern boolean _bfd_xcoff_bfd_final_link
 317   PARAMS ((bfd *, struct bfd_link_info *));
 318 extern boolean _bfd_ppc_xcoff_relocate_section
 319   PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
 320            struct internal_reloc *, struct internal_syment *, asection **));
 321
 322 /* And more taken from the source .. */
 323