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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-6.8/] [bfd/] [libecoff.h] - Blame information for rev 24

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1 24 jeremybenn
/* BFD ECOFF object file private structure.
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   Copyright 1993, 1994, 1995, 1996, 1999, 2001, 2002, 2003, 2004,
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   2005, 2006, 2007, 2008 Free Software Foundation, Inc.
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   Written by Ian Lance Taylor, Cygnus Support.
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6
   This file is part of BFD, the Binary File Descriptor library.
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   This program is free software; you can redistribute it and/or modify
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   it under the terms of the GNU General Public License as published by
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   the Free Software Foundation; either version 3 of the License, or
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   (at your option) any later version.
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   This program is distributed in the hope that it will be useful,
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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   GNU General Public License for more details.
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18
   You should have received a copy of the GNU General Public License
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   along with this program; if not, write to the Free Software
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   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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   MA 02110-1301, USA.  */
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#include "bfdlink.h"
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#ifndef ECOFF_H
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#include "coff/ecoff.h"
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#endif
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/* This is the backend information kept for ECOFF files.  This
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   structure is constant for a particular backend.  The first element
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   is the COFF backend data structure, so that ECOFF targets can use
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   the generic COFF code.  */
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#define ecoff_backend(abfd) \
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  ((struct ecoff_backend_data *) (abfd)->xvec->backend_data)
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struct ecoff_backend_data
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{
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  /* COFF backend information.  This must be the first field.  */
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  bfd_coff_backend_data coff;
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  /* Supported architecture.  */
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  enum bfd_architecture arch;
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  /* Initial portion of armap string.  */
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  const char *armap_start;
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  /* The page boundary used to align sections in a demand-paged
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     executable file.  E.g., 0x1000.  */
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  bfd_vma round;
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  /* TRUE if the .rdata section is part of the text segment, as on the
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     Alpha.  FALSE if .rdata is part of the data segment, as on the
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     MIPS.  */
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  bfd_boolean rdata_in_text;
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  /* Bitsize of constructor entries.  */
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  unsigned int constructor_bitsize;
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  /* Reloc to use for constructor entries.  */
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  reloc_howto_type *constructor_reloc;
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  /* How to swap debugging information.  */
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  struct ecoff_debug_swap debug_swap;
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  /* External reloc size.  */
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  bfd_size_type external_reloc_size;
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  /* Reloc swapping functions.  */
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  void (*swap_reloc_in) (bfd *, void *, struct internal_reloc *);
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  void (*swap_reloc_out) (bfd *, const struct internal_reloc *, void *);
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  /* Backend reloc tweaking.  */
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  void (*adjust_reloc_in)
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    (bfd *, const struct internal_reloc *, arelent *);
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  void (*adjust_reloc_out)
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    (bfd *, const arelent *, struct internal_reloc *);
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  /* Relocate section contents while linking.  */
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  bfd_boolean (*relocate_section)
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    (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, void *);
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  /* Do final adjustments to filehdr and aouthdr.  */
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  bfd_boolean (*adjust_headers)
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    (bfd *, struct internal_filehdr *, struct internal_aouthdr *);
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  /* Read an element from an archive at a given file position.  This
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     is needed because OSF/1 3.2 uses a weird archive format.  */
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  bfd *(*get_elt_at_filepos) (bfd *, file_ptr);
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};
78
 
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/* This is the target specific information kept for ECOFF files.  */
80
 
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#define ecoff_data(abfd) ((abfd)->tdata.ecoff_obj_data)
82
 
83
typedef struct ecoff_tdata
84
{
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  /* The reloc file position, set by
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     ecoff_compute_section_file_positions.  */
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  file_ptr reloc_filepos;
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  /* The symbol table file position, set by _bfd_ecoff_mkobject_hook.  */
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  file_ptr sym_filepos;
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  /* The start and end of the text segment.  Only valid for an
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     existing file, not for one we are creating.  */
94
  unsigned long text_start;
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  unsigned long text_end;
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  /* The cached gp value.  This is used when relocating.  */
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  bfd_vma gp;
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  /* The maximum size of objects to optimize using gp.  This is
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     typically set by the -G option to the compiler, assembler or
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     linker.  */
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  unsigned int gp_size;
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  /* The register masks.  When linking, all the masks found in the
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     input files are combined into the masks of the output file.
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     These are not all used for all targets, but that's OK, because
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     the relevant ones are the only ones swapped in and out.  */
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  unsigned long gprmask;
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  unsigned long fprmask;
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  unsigned long cprmask[4];
112
 
113
  /* The ECOFF symbolic debugging information.  */
114
  struct ecoff_debug_info debug_info;
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116
  /* The unswapped ECOFF symbolic information.  */
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  void * raw_syments;
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119
  /* The canonical BFD symbols.  */
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  struct ecoff_symbol_struct *canonical_symbols;
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  /* A mapping from external symbol numbers to entries in the linker
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     hash table, used when linking.  */
124
  struct ecoff_link_hash_entry **sym_hashes;
125
 
126
  /* A mapping from reloc symbol indices to sections, used when
127
     linking.  */
128
  asection **symndx_to_section;
129
 
130
  /* TRUE if this BFD was written by the backend linker.  */
131
  bfd_boolean linker;
132
 
133
  /* TRUE if a warning that multiple global pointer values are
134
     needed in the output binary was issued already.  */
135
  bfd_boolean issued_multiple_gp_warning;
136
 
137
  /* Used by find_nearest_line entry point.  The structure could be
138
     included directly in this one, but there's no point to wasting
139
     the memory just for the infrequently called find_nearest_line.  */
140
  struct ecoff_find_line *find_line_info;
141
 
142
  /* Whether the .rdata section is in the text segment for this
143
     particular ECOFF file.  This is not valid until
144
     ecoff_compute_section_file_positions is called.  */
145
  bfd_boolean rdata_in_text;
146
 
147
} ecoff_data_type;
148
 
149
/* Each canonical asymbol really looks like this.  */
150
 
151
typedef struct ecoff_symbol_struct
152
{
153
  /* The actual symbol which the rest of BFD works with */
154
  asymbol symbol;
155
 
156
  /* The fdr for this symbol.  */
157
  FDR *fdr;
158
 
159
  /* TRUE if this is a local symbol rather than an external one.  */
160
  bfd_boolean local;
161
 
162
  /* A pointer to the unswapped hidden information for this symbol.
163
     This is either a struct sym_ext or a struct ext_ext, depending on
164
     the value of the local field above.  */
165
  void * native;
166
} ecoff_symbol_type;
167
 
168
/* We take the address of the first element of an asymbol to ensure that the
169
   macro is only ever applied to an asymbol.  */
170
#define ecoffsymbol(asymbol) ((ecoff_symbol_type *) (&((asymbol)->the_bfd)))
171
 
172
/* We need to save the index of an external symbol when we write it
173
   out so that can set the symbol index correctly when we write out
174
   the relocs.  */
175
#define ecoff_get_sym_index(symbol) ((symbol)->udata.i)
176
#define ecoff_set_sym_index(symbol, idx) ((symbol)->udata.i = (idx))
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178
/* A pointer to this structure is put in the used_by_bfd pointer of
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   a section to keep track of any per-section data.
180
   The user_by_bfd pointer will be NULL if the information was not
181
   needed.  */
182
 
183
struct ecoff_section_tdata
184
{
185
  /* When producing an executable (i.e., final, non-relocatable link)
186
     on the Alpha, we may need to use multiple global pointer values
187
     to span the entire .lita section.  In essence, we allow each
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     input .lita section to have its own gp value.  To support this,
189
     we need to keep track of the gp values that we picked for each
190
     input .lita section . */
191
  bfd_vma gp;
192
};
193
 
194
/* An accessor macro for the ecoff_section_tdata structure.  */
195
#define ecoff_section_data(abfd, sec) \
196
  ((struct ecoff_section_tdata *) (sec)->used_by_bfd)
197
 
198
/* ECOFF linker hash table entries.  */
199
 
200
struct ecoff_link_hash_entry
201
{
202
  struct bfd_link_hash_entry root;
203
  /* Symbol index in output file.  */
204
  long indx;
205
  /* BFD that ext field value came from.  */
206
  bfd *abfd;
207
  /* ECOFF external symbol information.  */
208
  EXTR esym;
209
  /* Nonzero if this symbol has been written out.  */
210
  char written;
211
  /* Nonzero if this symbol was referred to as small undefined.  */
212
  char small;
213
};
214
 
215
/* ECOFF linker hash table.  */
216
 
217
struct ecoff_link_hash_table
218
{
219
  struct bfd_link_hash_table root;
220
};
221
 
222
/* Make an ECOFF object.  */
223
extern bfd_boolean _bfd_ecoff_mkobject (bfd *);
224
 
225
/* Read in the ECOFF symbolic debugging information.  */
226
extern bfd_boolean _bfd_ecoff_slurp_symbolic_info
227
  (bfd *, asection *, struct ecoff_debug_info *);
228
 
229
/* Generic ECOFF BFD backend vectors.  */
230
 
231
extern bfd_boolean _bfd_ecoff_write_object_contents (bfd *);
232
 
233
#define _bfd_ecoff_close_and_cleanup _bfd_generic_close_and_cleanup
234
#define _bfd_ecoff_bfd_free_cached_info _bfd_generic_bfd_free_cached_info
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extern bfd_boolean _bfd_ecoff_new_section_hook
236
  (bfd *, asection *);
237
extern bfd_boolean _bfd_ecoff_get_section_contents
238
  (bfd *, asection *, void * location, file_ptr, bfd_size_type);
239
 
240
#define _bfd_ecoff_bfd_link_split_section _bfd_generic_link_split_section
241
 
242
extern bfd_boolean _bfd_ecoff_bfd_copy_private_bfd_data
243
  (bfd *, bfd *);
244
#define _bfd_ecoff_bfd_copy_private_section_data \
245
  _bfd_generic_bfd_copy_private_section_data
246
 
247
#define _bfd_ecoff_bfd_copy_private_symbol_data \
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  _bfd_generic_bfd_copy_private_symbol_data
249
 
250
#define _bfd_ecoff_bfd_copy_private_header_data \
251
  _bfd_generic_bfd_copy_private_header_data
252
 
253
#define _bfd_ecoff_bfd_print_private_bfd_data \
254
  _bfd_generic_bfd_print_private_bfd_data
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256
#define _bfd_ecoff_bfd_merge_private_bfd_data \
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  _bfd_generic_bfd_merge_private_bfd_data
258
 
259
#define _bfd_ecoff_bfd_set_private_flags _bfd_generic_bfd_set_private_flags
260
extern bfd_boolean _bfd_ecoff_slurp_armap (bfd *);
261
#define _bfd_ecoff_slurp_extended_name_table _bfd_slurp_extended_name_table
262
#define _bfd_ecoff_construct_extended_name_table \
263
  _bfd_archive_bsd_construct_extended_name_table
264
#define _bfd_ecoff_truncate_arname bfd_dont_truncate_arname
265
extern bfd_boolean _bfd_ecoff_write_armap
266
  (bfd *, unsigned int, struct orl *, unsigned int, int);
267
#define _bfd_ecoff_read_ar_hdr _bfd_generic_read_ar_hdr
268
#define _bfd_ecoff_openr_next_archived_file \
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  bfd_generic_openr_next_archived_file
270
#define _bfd_ecoff_get_elt_at_index _bfd_generic_get_elt_at_index
271
#define _bfd_ecoff_generic_stat_arch_elt bfd_generic_stat_arch_elt
272
#define _bfd_ecoff_update_armap_timestamp bfd_true
273
#define _bfd_ecoff_bfd_is_target_special_symbol  \
274
  ((bfd_boolean (*) (bfd *, asymbol *)) bfd_false)
275
 
276
extern long _bfd_ecoff_get_symtab_upper_bound (bfd *);
277
extern long _bfd_ecoff_canonicalize_symtab (bfd *, asymbol **);
278
extern asymbol *_bfd_ecoff_make_empty_symbol (bfd *);
279
extern void _bfd_ecoff_print_symbol
280
  (bfd *, void *, asymbol *, bfd_print_symbol_type);
281
extern void _bfd_ecoff_get_symbol_info
282
  (bfd *, asymbol *, symbol_info *);
283
extern bfd_boolean _bfd_ecoff_bfd_is_local_label_name
284
  (bfd *, const char *);
285
#define _bfd_ecoff_get_lineno _bfd_nosymbols_get_lineno
286
extern bfd_boolean _bfd_ecoff_find_nearest_line
287
  (bfd *, asection *, asymbol **, bfd_vma, const char **, const char **,
288
   unsigned int *);
289
#define _bfd_ecoff_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
290
#define _bfd_ecoff_read_minisymbols _bfd_generic_read_minisymbols
291
#define _bfd_ecoff_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
292
#define _bfd_ecoff_find_inliner_info _bfd_nosymbols_find_inliner_info
293
 
294
#define _bfd_ecoff_get_reloc_upper_bound coff_get_reloc_upper_bound
295
extern long _bfd_ecoff_canonicalize_reloc
296
  (bfd *, asection *, arelent **, asymbol **symbols);
297
/* ecoff_bfd_reloc_type_lookup defined by backend. */
298
 
299
extern bfd_boolean _bfd_ecoff_set_arch_mach
300
  (bfd *, enum bfd_architecture, unsigned long);
301
extern bfd_boolean _bfd_ecoff_set_section_contents
302
  (bfd *, asection *, const void * location, file_ptr, bfd_size_type);
303
 
304
extern int _bfd_ecoff_sizeof_headers (bfd *, struct bfd_link_info *);
305
/* ecoff_bfd_get_relocated_section_contents defined by backend.  */
306
/* ecoff_bfd_relax_section defined by backend.  */
307
extern struct bfd_link_hash_table *_bfd_ecoff_bfd_link_hash_table_create
308
  (bfd *);
309
#define _bfd_ecoff_bfd_link_hash_table_free _bfd_generic_link_hash_table_free
310
extern bfd_boolean _bfd_ecoff_bfd_link_add_symbols
311
  (bfd *, struct bfd_link_info *);
312
#define _bfd_ecoff_bfd_link_just_syms _bfd_generic_link_just_syms
313
extern bfd_boolean _bfd_ecoff_bfd_final_link
314
  (bfd *, struct bfd_link_info *);
315
 
316
/* Hook functions for the generic COFF section reading code.  */
317
 
318
extern void * _bfd_ecoff_mkobject_hook (bfd *, void *, void *);
319
#define _bfd_ecoff_set_alignment_hook \
320
  ((void (*) (bfd *, asection *, void *)) bfd_void)
321
extern bfd_boolean _bfd_ecoff_set_arch_mach_hook
322
  (bfd *, void *);
323
extern bfd_boolean _bfd_ecoff_styp_to_sec_flags
324
  (bfd *, void *, const char *, asection *, flagword *);
325
extern bfd_boolean _bfd_ecoff_slurp_symbol_table (bfd *);
326
 
327
/* ECOFF auxiliary information swapping routines.  These are the same
328
   for all ECOFF targets, so they are defined in ecofflink.c.  */
329
 
330
extern void _bfd_ecoff_swap_tir_in
331
  (int, const struct tir_ext *, TIR *);
332
extern void _bfd_ecoff_swap_tir_out
333
  (int, const TIR *, struct tir_ext *);
334
extern void _bfd_ecoff_swap_rndx_in
335
  (int, const struct rndx_ext *, RNDXR *);
336
extern void _bfd_ecoff_swap_rndx_out
337
  (int, const RNDXR *, struct rndx_ext *);

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