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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-6.8/] [bfd/] [libecoff.h] - Blame information for rev 298

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1 24 jeremybenn
/* BFD ECOFF object file private structure.
2
   Copyright 1993, 1994, 1995, 1996, 1999, 2001, 2002, 2003, 2004,
3 225 jeremybenn
   2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
4 24 jeremybenn
   Written by Ian Lance Taylor, Cygnus Support.
5
 
6
   This file is part of BFD, the Binary File Descriptor library.
7
 
8
   This program is free software; you can redistribute it and/or modify
9
   it under the terms of the GNU General Public License as published by
10
   the Free Software Foundation; either version 3 of the License, or
11
   (at your option) any later version.
12
 
13
   This program is distributed in the hope that it will be useful,
14
   but WITHOUT ANY WARRANTY; without even the implied warranty of
15
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16
   GNU General Public License for more details.
17
 
18
   You should have received a copy of the GNU General Public License
19
   along with this program; if not, write to the Free Software
20
   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21
   MA 02110-1301, USA.  */
22
 
23
#include "bfdlink.h"
24
 
25
#ifndef ECOFF_H
26
#include "coff/ecoff.h"
27
#endif
28
 
29
/* This is the backend information kept for ECOFF files.  This
30
   structure is constant for a particular backend.  The first element
31
   is the COFF backend data structure, so that ECOFF targets can use
32
   the generic COFF code.  */
33
 
34
#define ecoff_backend(abfd) \
35
  ((struct ecoff_backend_data *) (abfd)->xvec->backend_data)
36
 
37
struct ecoff_backend_data
38
{
39
  /* COFF backend information.  This must be the first field.  */
40
  bfd_coff_backend_data coff;
41
  /* Supported architecture.  */
42
  enum bfd_architecture arch;
43
  /* Initial portion of armap string.  */
44
  const char *armap_start;
45
  /* The page boundary used to align sections in a demand-paged
46
     executable file.  E.g., 0x1000.  */
47
  bfd_vma round;
48
  /* 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
50
     MIPS.  */
51
  bfd_boolean rdata_in_text;
52
  /* Bitsize of constructor entries.  */
53
  unsigned int constructor_bitsize;
54
  /* Reloc to use for constructor entries.  */
55
  reloc_howto_type *constructor_reloc;
56
  /* How to swap debugging information.  */
57
  struct ecoff_debug_swap debug_swap;
58
  /* External reloc size.  */
59
  bfd_size_type external_reloc_size;
60
  /* Reloc swapping functions.  */
61
  void (*swap_reloc_in) (bfd *, void *, struct internal_reloc *);
62
  void (*swap_reloc_out) (bfd *, const struct internal_reloc *, void *);
63
  /* Backend reloc tweaking.  */
64
  void (*adjust_reloc_in)
65
    (bfd *, const struct internal_reloc *, arelent *);
66
  void (*adjust_reloc_out)
67
    (bfd *, const arelent *, struct internal_reloc *);
68
  /* Relocate section contents while linking.  */
69
  bfd_boolean (*relocate_section)
70
    (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, void *);
71
  /* Do final adjustments to filehdr and aouthdr.  */
72
  bfd_boolean (*adjust_headers)
73
    (bfd *, struct internal_filehdr *, struct internal_aouthdr *);
74
  /* Read an element from an archive at a given file position.  This
75
     is needed because OSF/1 3.2 uses a weird archive format.  */
76
  bfd *(*get_elt_at_filepos) (bfd *, file_ptr);
77
};
78
 
79 225 jeremybenn
/* ECOFF targets don't support COFF long section names, so this
80
  macro is provided to use as an initialiser for the related
81
  members of the embedded bfd_coff_backend_data struct.  */
82
#define ECOFF_NO_LONG_SECTION_NAMES (FALSE), _bfd_ecoff_no_long_sections
83
 
84 24 jeremybenn
/* This is the target specific information kept for ECOFF files.  */
85
 
86
#define ecoff_data(abfd) ((abfd)->tdata.ecoff_obj_data)
87
 
88
typedef struct ecoff_tdata
89
{
90
  /* The reloc file position, set by
91
     ecoff_compute_section_file_positions.  */
92
  file_ptr reloc_filepos;
93
 
94
  /* The symbol table file position, set by _bfd_ecoff_mkobject_hook.  */
95
  file_ptr sym_filepos;
96
 
97
  /* The start and end of the text segment.  Only valid for an
98
     existing file, not for one we are creating.  */
99
  unsigned long text_start;
100
  unsigned long text_end;
101
 
102
  /* The cached gp value.  This is used when relocating.  */
103
  bfd_vma gp;
104
 
105
  /* The maximum size of objects to optimize using gp.  This is
106
     typically set by the -G option to the compiler, assembler or
107
     linker.  */
108
  unsigned int gp_size;
109
 
110
  /* The register masks.  When linking, all the masks found in the
111
     input files are combined into the masks of the output file.
112
     These are not all used for all targets, but that's OK, because
113
     the relevant ones are the only ones swapped in and out.  */
114
  unsigned long gprmask;
115
  unsigned long fprmask;
116
  unsigned long cprmask[4];
117
 
118
  /* The ECOFF symbolic debugging information.  */
119
  struct ecoff_debug_info debug_info;
120
 
121
  /* The unswapped ECOFF symbolic information.  */
122
  void * raw_syments;
123
 
124
  /* The canonical BFD symbols.  */
125
  struct ecoff_symbol_struct *canonical_symbols;
126
 
127
  /* A mapping from external symbol numbers to entries in the linker
128
     hash table, used when linking.  */
129
  struct ecoff_link_hash_entry **sym_hashes;
130
 
131
  /* A mapping from reloc symbol indices to sections, used when
132
     linking.  */
133
  asection **symndx_to_section;
134
 
135
  /* TRUE if this BFD was written by the backend linker.  */
136
  bfd_boolean linker;
137
 
138
  /* TRUE if a warning that multiple global pointer values are
139
     needed in the output binary was issued already.  */
140
  bfd_boolean issued_multiple_gp_warning;
141
 
142
  /* Used by find_nearest_line entry point.  The structure could be
143
     included directly in this one, but there's no point to wasting
144
     the memory just for the infrequently called find_nearest_line.  */
145
  struct ecoff_find_line *find_line_info;
146
 
147
  /* Whether the .rdata section is in the text segment for this
148
     particular ECOFF file.  This is not valid until
149
     ecoff_compute_section_file_positions is called.  */
150
  bfd_boolean rdata_in_text;
151
 
152
} ecoff_data_type;
153
 
154
/* Each canonical asymbol really looks like this.  */
155
 
156
typedef struct ecoff_symbol_struct
157
{
158
  /* The actual symbol which the rest of BFD works with */
159
  asymbol symbol;
160
 
161
  /* The fdr for this symbol.  */
162
  FDR *fdr;
163
 
164
  /* TRUE if this is a local symbol rather than an external one.  */
165
  bfd_boolean local;
166
 
167
  /* A pointer to the unswapped hidden information for this symbol.
168
     This is either a struct sym_ext or a struct ext_ext, depending on
169
     the value of the local field above.  */
170
  void * native;
171
} ecoff_symbol_type;
172
 
173
/* We take the address of the first element of an asymbol to ensure that the
174
   macro is only ever applied to an asymbol.  */
175
#define ecoffsymbol(asymbol) ((ecoff_symbol_type *) (&((asymbol)->the_bfd)))
176
 
177
/* We need to save the index of an external symbol when we write it
178
   out so that can set the symbol index correctly when we write out
179
   the relocs.  */
180
#define ecoff_get_sym_index(symbol) ((symbol)->udata.i)
181
#define ecoff_set_sym_index(symbol, idx) ((symbol)->udata.i = (idx))
182
 
183
/* A pointer to this structure is put in the used_by_bfd pointer of
184
   a section to keep track of any per-section data.
185
   The user_by_bfd pointer will be NULL if the information was not
186
   needed.  */
187
 
188
struct ecoff_section_tdata
189
{
190
  /* When producing an executable (i.e., final, non-relocatable link)
191
     on the Alpha, we may need to use multiple global pointer values
192
     to span the entire .lita section.  In essence, we allow each
193
     input .lita section to have its own gp value.  To support this,
194
     we need to keep track of the gp values that we picked for each
195
     input .lita section . */
196
  bfd_vma gp;
197
};
198
 
199
/* An accessor macro for the ecoff_section_tdata structure.  */
200
#define ecoff_section_data(abfd, sec) \
201
  ((struct ecoff_section_tdata *) (sec)->used_by_bfd)
202
 
203
/* ECOFF linker hash table entries.  */
204
 
205
struct ecoff_link_hash_entry
206
{
207
  struct bfd_link_hash_entry root;
208
  /* Symbol index in output file.  */
209
  long indx;
210
  /* BFD that ext field value came from.  */
211
  bfd *abfd;
212
  /* ECOFF external symbol information.  */
213
  EXTR esym;
214
  /* Nonzero if this symbol has been written out.  */
215
  char written;
216
  /* Nonzero if this symbol was referred to as small undefined.  */
217
  char small;
218
};
219
 
220
/* ECOFF linker hash table.  */
221
 
222
struct ecoff_link_hash_table
223
{
224
  struct bfd_link_hash_table root;
225
};
226
 
227
/* Make an ECOFF object.  */
228
extern bfd_boolean _bfd_ecoff_mkobject (bfd *);
229
 
230
/* Read in the ECOFF symbolic debugging information.  */
231
extern bfd_boolean _bfd_ecoff_slurp_symbolic_info
232
  (bfd *, asection *, struct ecoff_debug_info *);
233
 
234
/* Generic ECOFF BFD backend vectors.  */
235
 
236
extern bfd_boolean _bfd_ecoff_write_object_contents (bfd *);
237
 
238
#define _bfd_ecoff_close_and_cleanup _bfd_generic_close_and_cleanup
239
#define _bfd_ecoff_bfd_free_cached_info _bfd_generic_bfd_free_cached_info
240
extern bfd_boolean _bfd_ecoff_new_section_hook
241
  (bfd *, asection *);
242
extern bfd_boolean _bfd_ecoff_get_section_contents
243
  (bfd *, asection *, void * location, file_ptr, bfd_size_type);
244
 
245
#define _bfd_ecoff_bfd_link_split_section _bfd_generic_link_split_section
246
 
247
extern bfd_boolean _bfd_ecoff_bfd_copy_private_bfd_data
248
  (bfd *, bfd *);
249
#define _bfd_ecoff_bfd_copy_private_section_data \
250
  _bfd_generic_bfd_copy_private_section_data
251
 
252
#define _bfd_ecoff_bfd_copy_private_symbol_data \
253
  _bfd_generic_bfd_copy_private_symbol_data
254
 
255
#define _bfd_ecoff_bfd_copy_private_header_data \
256
  _bfd_generic_bfd_copy_private_header_data
257
 
258
#define _bfd_ecoff_bfd_print_private_bfd_data \
259
  _bfd_generic_bfd_print_private_bfd_data
260
 
261
#define _bfd_ecoff_bfd_merge_private_bfd_data \
262
  _bfd_generic_bfd_merge_private_bfd_data
263
 
264
#define _bfd_ecoff_bfd_set_private_flags _bfd_generic_bfd_set_private_flags
265
extern bfd_boolean _bfd_ecoff_slurp_armap (bfd *);
266
#define _bfd_ecoff_slurp_extended_name_table _bfd_slurp_extended_name_table
267
#define _bfd_ecoff_construct_extended_name_table \
268
  _bfd_archive_bsd_construct_extended_name_table
269
#define _bfd_ecoff_truncate_arname bfd_dont_truncate_arname
270
extern bfd_boolean _bfd_ecoff_write_armap
271
  (bfd *, unsigned int, struct orl *, unsigned int, int);
272
#define _bfd_ecoff_read_ar_hdr _bfd_generic_read_ar_hdr
273
#define _bfd_ecoff_openr_next_archived_file \
274
  bfd_generic_openr_next_archived_file
275
#define _bfd_ecoff_get_elt_at_index _bfd_generic_get_elt_at_index
276
#define _bfd_ecoff_generic_stat_arch_elt bfd_generic_stat_arch_elt
277
#define _bfd_ecoff_update_armap_timestamp bfd_true
278
#define _bfd_ecoff_bfd_is_target_special_symbol  \
279
  ((bfd_boolean (*) (bfd *, asymbol *)) bfd_false)
280
 
281
extern long _bfd_ecoff_get_symtab_upper_bound (bfd *);
282
extern long _bfd_ecoff_canonicalize_symtab (bfd *, asymbol **);
283
extern asymbol *_bfd_ecoff_make_empty_symbol (bfd *);
284
extern void _bfd_ecoff_print_symbol
285
  (bfd *, void *, asymbol *, bfd_print_symbol_type);
286
extern void _bfd_ecoff_get_symbol_info
287
  (bfd *, asymbol *, symbol_info *);
288
extern bfd_boolean _bfd_ecoff_bfd_is_local_label_name
289
  (bfd *, const char *);
290
#define _bfd_ecoff_get_lineno _bfd_nosymbols_get_lineno
291
extern bfd_boolean _bfd_ecoff_find_nearest_line
292
  (bfd *, asection *, asymbol **, bfd_vma, const char **, const char **,
293
   unsigned int *);
294
#define _bfd_ecoff_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
295
#define _bfd_ecoff_read_minisymbols _bfd_generic_read_minisymbols
296
#define _bfd_ecoff_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
297
#define _bfd_ecoff_find_inliner_info _bfd_nosymbols_find_inliner_info
298
 
299
#define _bfd_ecoff_get_reloc_upper_bound coff_get_reloc_upper_bound
300
extern long _bfd_ecoff_canonicalize_reloc
301
  (bfd *, asection *, arelent **, asymbol **symbols);
302
/* ecoff_bfd_reloc_type_lookup defined by backend. */
303
 
304
extern bfd_boolean _bfd_ecoff_set_arch_mach
305
  (bfd *, enum bfd_architecture, unsigned long);
306
extern bfd_boolean _bfd_ecoff_set_section_contents
307
  (bfd *, asection *, const void * location, file_ptr, bfd_size_type);
308
 
309
extern int _bfd_ecoff_sizeof_headers (bfd *, struct bfd_link_info *);
310
/* ecoff_bfd_get_relocated_section_contents defined by backend.  */
311
/* ecoff_bfd_relax_section defined by backend.  */
312
extern struct bfd_link_hash_table *_bfd_ecoff_bfd_link_hash_table_create
313
  (bfd *);
314
#define _bfd_ecoff_bfd_link_hash_table_free _bfd_generic_link_hash_table_free
315
extern bfd_boolean _bfd_ecoff_bfd_link_add_symbols
316
  (bfd *, struct bfd_link_info *);
317
#define _bfd_ecoff_bfd_link_just_syms _bfd_generic_link_just_syms
318
extern bfd_boolean _bfd_ecoff_bfd_final_link
319
  (bfd *, struct bfd_link_info *);
320
 
321
/* Hook functions for the generic COFF section reading code.  */
322
 
323
extern void * _bfd_ecoff_mkobject_hook (bfd *, void *, void *);
324
#define _bfd_ecoff_set_alignment_hook \
325
  ((void (*) (bfd *, asection *, void *)) bfd_void)
326
extern bfd_boolean _bfd_ecoff_set_arch_mach_hook
327
  (bfd *, void *);
328 225 jeremybenn
extern bfd_boolean _bfd_ecoff_no_long_sections
329
  (bfd *abfd, int enable);
330 24 jeremybenn
extern bfd_boolean _bfd_ecoff_styp_to_sec_flags
331
  (bfd *, void *, const char *, asection *, flagword *);
332
extern bfd_boolean _bfd_ecoff_slurp_symbol_table (bfd *);
333
 
334
/* ECOFF auxiliary information swapping routines.  These are the same
335
   for all ECOFF targets, so they are defined in ecofflink.c.  */
336
 
337
extern void _bfd_ecoff_swap_tir_in
338
  (int, const struct tir_ext *, TIR *);
339
extern void _bfd_ecoff_swap_tir_out
340
  (int, const TIR *, struct tir_ext *);
341
extern void _bfd_ecoff_swap_rndx_in
342
  (int, const struct rndx_ext *, RNDXR *);
343
extern void _bfd_ecoff_swap_rndx_out
344
  (int, const RNDXR *, struct rndx_ext *);

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