OpenCores
URL https://opencores.org/ocsvn/openrisc_me/openrisc_me/trunk

Subversion Repositories openrisc_me

[/] [openrisc/] [trunk/] [gnu-src/] [gdb-6.8/] [bfd/] [m68klinux.c] - Blame information for rev 298

Go to most recent revision | Details | Compare with Previous | View Log

Line No. Rev Author Line
1 24 jeremybenn
/* BFD back-end for linux flavored m68k a.out binaries.
2
   Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1999, 2000, 2001, 2002,
3 225 jeremybenn
   2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
4 24 jeremybenn
 
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 3 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., 51 Franklin Street - Fifth Floor, Boston,
20
   MA 02110-1301, USA.  */
21
 
22
#define TARGET_PAGE_SIZE 4096
23
#define ZMAGIC_DISK_BLOCK_SIZE 1024
24
#define SEGMENT_SIZE TARGET_PAGE_SIZE
25
#define TEXT_START_ADDR 0x0
26
#define N_SHARED_LIB(x) 0
27
 
28
#define MACHTYPE_OK(mtype) ((mtype) == M_68020 || (mtype) == M_UNKNOWN)
29
 
30
#include "sysdep.h"
31
#include "bfd.h"
32
#include "libbfd.h"
33
#include "aout/aout64.h"
34
#include "aout/stab_gnu.h"
35
#include "aout/ar.h"
36
#include "libaout.h"           /* BFD a.out internal data structures */
37
 
38
#define TARGET_IS_BIG_ENDIAN_P
39
#define DEFAULT_ARCH bfd_arch_m68k
40
 
41
/* Do not "beautify" the CONCAT* macro args.  Traditional C will not
42
   remove whitespace added here, and thus will fail to concatenate
43
   the tokens.  */
44
#define MY(OP) CONCAT2 (m68klinux_,OP)
45
#define TARGETNAME "a.out-m68k-linux"
46
 
47
extern const bfd_target MY(vec);
48
 
49
/* We always generate QMAGIC files in preference to ZMAGIC files.  It
50
   would be possible to make this a linker option, if that ever
51
   becomes important.  */
52
 
53
static void MY_final_link_callback
54
  PARAMS ((bfd *, file_ptr *, file_ptr *, file_ptr *));
55
static bfd_boolean m68klinux_bfd_final_link
56
  PARAMS ((bfd *, struct bfd_link_info *));
57
static bfd_boolean m68klinux_write_object_contents PARAMS ((bfd *));
58
 
59
static bfd_boolean
60
m68klinux_bfd_final_link (abfd, info)
61
     bfd *abfd;
62
     struct bfd_link_info *info;
63
{
64
  obj_aout_subformat (abfd) = q_magic_format;
65
  return NAME(aout,final_link) (abfd, info, MY_final_link_callback);
66
}
67
 
68
#define MY_bfd_final_link m68klinux_bfd_final_link
69
 
70
/* Set the machine type correctly.  */
71
 
72
static bfd_boolean
73
m68klinux_write_object_contents (abfd)
74
     bfd *abfd;
75
{
76
  struct external_exec exec_bytes;
77
  struct internal_exec *execp = exec_hdr (abfd);
78
 
79
  N_SET_MACHTYPE (*execp, M_68020);
80
 
81
  obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
82
 
83
  WRITE_HEADERS(abfd, execp);
84
 
85
  return TRUE;
86
}
87
 
88
#define MY_write_object_contents m68klinux_write_object_contents
89
 
90
/* Code to link against Linux a.out shared libraries.  */
91
 
92
/* See if a symbol name is a reference to the global offset table.  */
93
 
94
#ifndef GOT_REF_PREFIX
95
#define GOT_REF_PREFIX  "__GOT_"
96
#endif
97
 
98
#define IS_GOT_SYM(name)  (CONST_STRNEQ (name, GOT_REF_PREFIX))
99
 
100
/* See if a symbol name is a reference to the procedure linkage table.  */
101
 
102
#ifndef PLT_REF_PREFIX
103
#define PLT_REF_PREFIX  "__PLT_"
104
#endif
105
 
106
#define IS_PLT_SYM(name)  (CONST_STRNEQ (name, PLT_REF_PREFIX))
107
 
108
/* This string is used to generate specialized error messages.  */
109
 
110
#ifndef NEEDS_SHRLIB
111
#define NEEDS_SHRLIB "__NEEDS_SHRLIB_"
112
#endif
113
 
114
/* This special symbol is a set vector that contains a list of
115
   pointers to fixup tables.  It will be present in any dynamically
116
   linked file.  The linker generated fixup table should also be added
117
   to the list, and it should always appear in the second slot (the
118
   first one is a dummy with a magic number that is defined in
119
   crt0.o).  */
120
 
121
#ifndef SHARABLE_CONFLICTS
122
#define SHARABLE_CONFLICTS "__SHARABLE_CONFLICTS__"
123
#endif
124
 
125
/* We keep a list of fixups.  The terminology is a bit strange, but
126
   each fixup contains two 32 bit numbers.  A regular fixup contains
127
   an address and a pointer, and at runtime we should store the
128
   address at the location pointed to by the pointer.  A builtin fixup
129
   contains two pointers, and we should read the address using one
130
   pointer and store it at the location pointed to by the other
131
   pointer.  Builtin fixups come into play when we have duplicate
132
   __GOT__ symbols for the same variable.  The builtin fixup will copy
133
   the GOT pointer from one over into the other.  */
134
 
135
struct fixup
136
{
137
  struct fixup *next;
138
  struct linux_link_hash_entry *h;
139
  bfd_vma value;
140
 
141
  /* Nonzero if this is a jump instruction that needs to be fixed,
142
     zero if this is just a pointer */
143
  char jump;
144
 
145
  char builtin;
146
};
147
 
148
/* We don't need a special hash table entry structure, but we do need
149
   to keep some information between linker passes, so we use a special
150
   hash table.  */
151
 
152
struct linux_link_hash_entry
153
{
154
  struct aout_link_hash_entry root;
155
};
156
 
157
struct linux_link_hash_table
158
{
159
  struct aout_link_hash_table root;
160
 
161
  /* First dynamic object found in link.  */
162
  bfd *dynobj;
163
 
164
  /* Number of fixups.  */
165
  size_t fixup_count;
166
 
167
  /* Number of builtin fixups.  */
168
  size_t local_builtins;
169
 
170
  /* List of fixups.  */
171
  struct fixup *fixup_list;
172
};
173
 
174
static struct bfd_hash_entry *linux_link_hash_newfunc
175
  PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
176
static struct bfd_link_hash_table *linux_link_hash_table_create
177
  PARAMS ((bfd *));
178
static struct fixup *new_fixup
179
  PARAMS ((struct bfd_link_info *, struct linux_link_hash_entry *,
180
           bfd_vma, int));
181
static bfd_boolean linux_link_create_dynamic_sections
182
  PARAMS ((bfd *, struct bfd_link_info *));
183
static bfd_boolean linux_add_one_symbol
184
  PARAMS ((struct bfd_link_info *, bfd *, const char *, flagword, asection *,
185
           bfd_vma, const char *, bfd_boolean, bfd_boolean,
186
           struct bfd_link_hash_entry **));
187
static bfd_boolean linux_tally_symbols
188
  PARAMS ((struct linux_link_hash_entry *, PTR));
189
static bfd_boolean linux_finish_dynamic_link
190
  PARAMS ((bfd *, struct bfd_link_info *));
191
 
192
/* Routine to create an entry in an Linux link hash table.  */
193
 
194
static struct bfd_hash_entry *
195
linux_link_hash_newfunc (entry, table, string)
196
     struct bfd_hash_entry *entry;
197
     struct bfd_hash_table *table;
198
     const char *string;
199
{
200
  struct linux_link_hash_entry *ret = (struct linux_link_hash_entry *) entry;
201
 
202
  /* Allocate the structure if it has not already been allocated by a
203
     subclass.  */
204
  if (ret == (struct linux_link_hash_entry *) NULL)
205
    ret = ((struct linux_link_hash_entry *)
206
           bfd_hash_allocate (table, sizeof (struct linux_link_hash_entry)));
207
  if (ret == NULL)
208
    return (struct bfd_hash_entry *) ret;
209
 
210
  /* Call the allocation method of the superclass.  */
211
  ret = ((struct linux_link_hash_entry *)
212
         NAME(aout,link_hash_newfunc) ((struct bfd_hash_entry *) ret,
213
                                       table, string));
214
  if (ret != NULL)
215
    {
216
      /* Set local fields; there aren't any.  */
217
    }
218
 
219
  return (struct bfd_hash_entry *) ret;
220
}
221
 
222
/* Create a Linux link hash table.  */
223
 
224
static struct bfd_link_hash_table *
225
linux_link_hash_table_create (abfd)
226
     bfd *abfd;
227
{
228
  struct linux_link_hash_table *ret;
229
  bfd_size_type amt = sizeof (struct linux_link_hash_table);
230
 
231
  ret = (struct linux_link_hash_table *) bfd_malloc (amt);
232
  if (ret == (struct linux_link_hash_table *) NULL)
233
    {
234
      bfd_set_error (bfd_error_no_memory);
235
      return (struct bfd_link_hash_table *) NULL;
236
    }
237
  if (!NAME(aout,link_hash_table_init) (&ret->root, abfd,
238
                                        linux_link_hash_newfunc,
239
                                        sizeof (struct linux_link_hash_entry)))
240
    {
241
      free (ret);
242
      return (struct bfd_link_hash_table *) NULL;
243
    }
244
 
245
  ret->dynobj = NULL;
246
  ret->fixup_count = 0;
247
  ret->local_builtins = 0;
248
  ret->fixup_list = NULL;
249
 
250
  return &ret->root.root;
251
}
252
 
253
/* Look up an entry in a Linux link hash table.  */
254
 
255
#define linux_link_hash_lookup(table, string, create, copy, follow) \
256
  ((struct linux_link_hash_entry *) \
257
   aout_link_hash_lookup (&(table)->root, (string), (create), (copy),\
258
                          (follow)))
259
 
260
/* Traverse a Linux link hash table.  */
261
 
262
#define linux_link_hash_traverse(table, func, info)                     \
263
  (aout_link_hash_traverse                                              \
264
   (&(table)->root,                                                     \
265
    (bfd_boolean (*) PARAMS ((struct aout_link_hash_entry *, PTR))) (func),     \
266
    (info)))
267
 
268
/* Get the Linux link hash table from the info structure.  This is
269
   just a cast.  */
270
 
271
#define linux_hash_table(p) ((struct linux_link_hash_table *) ((p)->hash))
272
 
273
/* Store the information for a new fixup.  */
274
 
275
static struct fixup *
276
new_fixup (info, h, value, builtin)
277
     struct bfd_link_info *info;
278
     struct linux_link_hash_entry *h;
279
     bfd_vma value;
280
     int builtin;
281
{
282
  struct fixup *f;
283
 
284
  f = (struct fixup *) bfd_hash_allocate (&info->hash->table,
285
                                          sizeof (struct fixup));
286
  if (f == NULL)
287
    return f;
288
  f->next = linux_hash_table (info)->fixup_list;
289
  linux_hash_table (info)->fixup_list = f;
290
  f->h = h;
291
  f->value = value;
292
  f->builtin = builtin;
293
  f->jump = 0;
294
  ++linux_hash_table (info)->fixup_count;
295
  return f;
296
}
297
 
298
/* We come here once we realize that we are going to link to a shared
299
   library.  We need to create a special section that contains the
300
   fixup table, and we ultimately need to add a pointer to this into
301
   the set vector for SHARABLE_CONFLICTS.  At this point we do not
302
   know the size of the section, but that's OK - we just need to
303
   create it for now.  */
304
 
305
static bfd_boolean
306
linux_link_create_dynamic_sections (abfd, info)
307
     bfd *abfd;
308
     struct bfd_link_info *info ATTRIBUTE_UNUSED;
309
{
310
  flagword flags;
311
  register asection *s;
312
 
313
  /* Note that we set the SEC_IN_MEMORY flag.  */
314
  flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY;
315
 
316
  /* We choose to use the name ".linux-dynamic" for the fixup table.
317
     Why not? */
318
  s = bfd_make_section_with_flags (abfd, ".linux-dynamic", flags);
319
  if (s == NULL
320
      || ! bfd_set_section_alignment (abfd, s, 2))
321
    return FALSE;
322
  s->size = 0;
323
  s->contents = 0;
324
 
325
  return TRUE;
326
}
327
 
328
/* Function to add a single symbol to the linker hash table.  This is
329
   a wrapper around _bfd_generic_link_add_one_symbol which handles the
330
   tweaking needed for dynamic linking support.  */
331
 
332
static bfd_boolean
333
linux_add_one_symbol (info, abfd, name, flags, section, value, string,
334
                      copy, collect, hashp)
335
     struct bfd_link_info *info;
336
     bfd *abfd;
337
     const char *name;
338
     flagword flags;
339
     asection *section;
340
     bfd_vma value;
341
     const char *string;
342
     bfd_boolean copy;
343
     bfd_boolean collect;
344
     struct bfd_link_hash_entry **hashp;
345
{
346
  struct linux_link_hash_entry *h;
347
  bfd_boolean insert;
348
 
349
  /* Look up and see if we already have this symbol in the hash table.
350
     If we do, and the defining entry is from a shared library, we
351
     need to create the dynamic sections.
352
 
353
     FIXME: What if abfd->xvec != info->output_bfd->xvec?  We may
354
     want to be able to link Linux a.out and ELF objects together,
355
     but serious confusion is possible.  */
356
 
357
  insert = FALSE;
358
 
359
  if (! info->relocatable
360
      && linux_hash_table (info)->dynobj == NULL
361
      && strcmp (name, SHARABLE_CONFLICTS) == 0
362
      && (flags & BSF_CONSTRUCTOR) != 0
363
      && abfd->xvec == info->output_bfd->xvec)
364
    {
365
      if (! linux_link_create_dynamic_sections (abfd, info))
366
        return FALSE;
367
      linux_hash_table (info)->dynobj = abfd;
368
      insert = TRUE;
369
    }
370
 
371
  if (bfd_is_abs_section (section)
372
      && abfd->xvec == info->output_bfd->xvec)
373
    {
374
      h = linux_link_hash_lookup (linux_hash_table (info), name, FALSE,
375
                                  FALSE, FALSE);
376
      if (h != NULL
377
          && (h->root.root.type == bfd_link_hash_defined
378
              || h->root.root.type == bfd_link_hash_defweak))
379
        {
380
          struct fixup *f;
381
 
382
          if (hashp != NULL)
383
            *hashp = (struct bfd_link_hash_entry *) h;
384
 
385
          f = new_fixup (info, h, value, ! IS_PLT_SYM (name));
386
          if (f == NULL)
387
            return FALSE;
388
          f->jump = IS_PLT_SYM (name);
389
 
390
          return TRUE;
391
        }
392
    }
393
 
394
  /* Do the usual procedure for adding a symbol.  */
395
  if (! _bfd_generic_link_add_one_symbol (info, abfd, name, flags, section,
396
                                          value, string, copy, collect,
397
                                          hashp))
398
    return FALSE;
399
 
400
  /* Insert a pointer to our table in the set vector.  The dynamic
401
     linker requires this information */
402
  if (insert)
403
    {
404
      asection *s;
405
 
406
      /* Here we do our special thing to add the pointer to the
407
         dynamic section in the SHARABLE_CONFLICTS set vector.  */
408
      s = bfd_get_section_by_name (linux_hash_table (info)->dynobj,
409
                                   ".linux-dynamic");
410
      BFD_ASSERT (s != NULL);
411
 
412
      if (! (_bfd_generic_link_add_one_symbol
413
             (info, linux_hash_table (info)->dynobj, SHARABLE_CONFLICTS,
414
              BSF_GLOBAL | BSF_CONSTRUCTOR, s, (bfd_vma) 0, NULL,
415
              FALSE, FALSE, NULL)))
416
        return FALSE;
417
    }
418
 
419
  return TRUE;
420
}
421
 
422
/* We will crawl the hash table and come here for every global symbol.
423
   We will examine each entry and see if there are indications that we
424
   need to add a fixup.  There are two possible cases - one is where
425
   you have duplicate definitions of PLT or GOT symbols - these will
426
   have already been caught and added as "builtin" fixups.  If we find
427
   that the corresponding non PLT/GOT symbol is also present, we
428
   convert it to a regular fixup instead.
429
 
430
   This function is called via linux_link_hash_traverse.  */
431
 
432
static bfd_boolean
433
linux_tally_symbols (h, data)
434
     struct linux_link_hash_entry *h;
435
     PTR data;
436
{
437
  struct bfd_link_info *info = (struct bfd_link_info *) data;
438
  struct fixup *f, *f1;
439
  int is_plt;
440
  struct linux_link_hash_entry *h1, *h2;
441
  bfd_boolean exists;
442
 
443
  if (h->root.root.type == bfd_link_hash_warning)
444
    h = (struct linux_link_hash_entry *) h->root.root.u.i.link;
445
 
446
  if (h->root.root.type == bfd_link_hash_undefined
447
      && CONST_STRNEQ (h->root.root.root.string, NEEDS_SHRLIB))
448
    {
449
      const char *name;
450
      char *p;
451
      char *alloc = NULL;
452
 
453
      name = h->root.root.root.string + sizeof NEEDS_SHRLIB - 1;
454
      p = strrchr (name, '_');
455
      if (p != NULL)
456
        alloc = (char *) bfd_malloc ((bfd_size_type) strlen (name) + 1);
457
 
458
      if (p == NULL || alloc == NULL)
459
        (*_bfd_error_handler) (_("Output file requires shared library `%s'\n"),
460
                               name);
461
      else
462
        {
463
          strcpy (alloc, name);
464
          p = strrchr (alloc, '_');
465
          *p++ = '\0';
466
          (*_bfd_error_handler)
467
            (_("Output file requires shared library `%s.so.%s'\n"),
468
             alloc, p);
469
          free (alloc);
470
        }
471
 
472
      abort ();
473
    }
474
 
475
  /* If this symbol is not a PLT/GOT, we do not even need to look at it */
476
  is_plt = IS_PLT_SYM (h->root.root.root.string);
477
 
478
  if (is_plt || IS_GOT_SYM (h->root.root.root.string))
479
    {
480
      /* Look up this symbol twice.  Once just as a regular lookup,
481
         and then again following all of the indirect links until we
482
         reach a real symbol.  */
483
      h1 = linux_link_hash_lookup (linux_hash_table (info),
484
                                   (h->root.root.root.string
485
                                    + sizeof PLT_REF_PREFIX - 1),
486
                                   FALSE, FALSE, TRUE);
487
      /* h2 does not follow indirect symbols.  */
488
      h2 = linux_link_hash_lookup (linux_hash_table (info),
489
                                   (h->root.root.root.string
490
                                    + sizeof PLT_REF_PREFIX - 1),
491
                                   FALSE, FALSE, FALSE);
492
 
493
      /* The real symbol must exist but if it is also an ABS symbol,
494
         there is no need to have a fixup.  This is because they both
495
         came from the same library.  If on the other hand, we had to
496
         use an indirect symbol to get to the real symbol, we add the
497
         fixup anyway, since there are cases where these symbols come
498
         from different shared libraries */
499
      if (h1 != NULL
500
          && (((h1->root.root.type == bfd_link_hash_defined
501
                || h1->root.root.type == bfd_link_hash_defweak)
502
               && ! bfd_is_abs_section (h1->root.root.u.def.section))
503
              || h2->root.root.type == bfd_link_hash_indirect))
504
        {
505
          /* See if there is a "builtin" fixup already present
506
             involving this symbol.  If so, convert it to a regular
507
             fixup.  In the end, this relaxes some of the requirements
508
             about the order of performing fixups.  */
509
          exists = FALSE;
510
          for (f1 = linux_hash_table (info)->fixup_list;
511
               f1 != NULL;
512
               f1 = f1->next)
513
            {
514
              if ((f1->h != h && f1->h != h1)
515
                  || (! f1->builtin && ! f1->jump))
516
                continue;
517
              if (f1->h == h1)
518
                exists = TRUE;
519
              if (! exists
520
                  && bfd_is_abs_section (h->root.root.u.def.section))
521
                {
522
                  f = new_fixup (info, h1, f1->h->root.root.u.def.value, 0);
523
                  f->jump = is_plt;
524
                }
525
              f1->h = h1;
526
              f1->jump = is_plt;
527
              f1->builtin = 0;
528
              exists = TRUE;
529
            }
530
          if (! exists
531
              && bfd_is_abs_section (h->root.root.u.def.section))
532
            {
533
              f = new_fixup (info, h1, h->root.root.u.def.value, 0);
534
              if (f == NULL)
535
                {
536
                  /* FIXME: No way to return error.  */
537
                  abort ();
538
                }
539
              f->jump = is_plt;
540
            }
541
        }
542
 
543
      /* Quick and dirty way of stripping these symbols from the
544
         symtab.  */
545
      if (bfd_is_abs_section (h->root.root.u.def.section))
546
        h->root.written = TRUE;
547
    }
548
 
549
  return TRUE;
550
}
551
 
552
/* This is called to set the size of the .linux-dynamic section is.
553
   It is called by the Linux linker emulation before_allocation
554
   routine.  We have finished reading all of the input files, and now
555
   we just scan the hash tables to find out how many additional fixups
556
   are required.  */
557
 
558
bfd_boolean
559
bfd_m68klinux_size_dynamic_sections (output_bfd, info)
560
     bfd *output_bfd;
561
     struct bfd_link_info *info;
562
{
563
  struct fixup *f;
564
  asection *s;
565
 
566
  if (output_bfd->xvec != &MY(vec))
567
    return TRUE;
568
 
569
  /* First find the fixups...  */
570
  linux_link_hash_traverse (linux_hash_table (info),
571
                            linux_tally_symbols,
572
                            (PTR) info);
573
 
574
  /* If there are builtin fixups, leave room for a marker.  This is
575
     used by the dynamic linker so that it knows that all that follow
576
     are builtin fixups instead of regular fixups.  */
577
  for (f = linux_hash_table (info)->fixup_list; f != NULL; f = f->next)
578
    {
579
      if (f->builtin)
580
        {
581
          ++linux_hash_table (info)->fixup_count;
582
          ++linux_hash_table (info)->local_builtins;
583
          break;
584
        }
585
    }
586
 
587
  if (linux_hash_table (info)->dynobj == NULL)
588
    {
589
      if (linux_hash_table (info)->fixup_count > 0)
590
        abort ();
591
      return TRUE;
592
    }
593
 
594
  /* Allocate memory for our fixup table.  We will fill it in later.  */
595
  s = bfd_get_section_by_name (linux_hash_table (info)->dynobj,
596
                               ".linux-dynamic");
597
  if (s != NULL)
598
    {
599
      s->size = linux_hash_table (info)->fixup_count + 1;
600
      s->size *= 8;
601
      s->contents = (bfd_byte *) bfd_zalloc (output_bfd, s->size);
602
      if (s->contents == NULL)
603
        {
604
          bfd_set_error (bfd_error_no_memory);
605
          return FALSE;
606
        }
607
    }
608
 
609
  return TRUE;
610
}
611
 
612
/* We come here once we are ready to actually write the fixup table to
613
   the output file.  Scan the fixup tables and so forth and generate
614
   the stuff we need.  */
615
 
616
static bfd_boolean
617
linux_finish_dynamic_link (output_bfd, info)
618
     bfd *output_bfd;
619
     struct bfd_link_info *info;
620
{
621
  asection *s, *os, *is;
622
  bfd_byte *fixup_table;
623
  struct linux_link_hash_entry *h;
624
  struct fixup *f;
625
  unsigned int new_addr;
626
  int section_offset;
627
  unsigned int fixups_written;
628
 
629
  if (linux_hash_table (info)->dynobj == NULL)
630
    return TRUE;
631
 
632
  s = bfd_get_section_by_name (linux_hash_table (info)->dynobj,
633
                               ".linux-dynamic");
634
  BFD_ASSERT (s != NULL);
635
  os = s->output_section;
636
  fixups_written = 0;
637
 
638
#ifdef LINUX_LINK_DEBUG
639
  printf ("Fixup table file offset: %x  VMA: %x\n",
640
          os->filepos + s->output_offset,
641
          os->vma + s->output_offset);
642
#endif
643
 
644
  fixup_table = s->contents;
645
  bfd_put_32 (output_bfd, (bfd_vma) linux_hash_table (info)->fixup_count,
646
              fixup_table);
647
  fixup_table += 4;
648
 
649
  /* Fill in fixup table.  */
650
  for (f = linux_hash_table (info)->fixup_list; f != NULL; f = f->next)
651
    {
652
      if (f->builtin)
653
        continue;
654
 
655
      if (f->h->root.root.type != bfd_link_hash_defined
656
          && f->h->root.root.type != bfd_link_hash_defweak)
657
        {
658
          (*_bfd_error_handler)
659
            (_("Symbol %s not defined for fixups\n"),
660
             f->h->root.root.root.string);
661
          continue;
662
        }
663
 
664
      is = f->h->root.root.u.def.section;
665
      section_offset = is->output_section->vma + is->output_offset;
666
      new_addr = f->h->root.root.u.def.value + section_offset;
667
 
668
#ifdef LINUX_LINK_DEBUG
669
      printf ("Fixup(%d) %s: %x %x\n",f->jump, f->h->root.root.string,
670
              new_addr, f->value);
671
#endif
672
 
673
      if (f->jump)
674
        {
675
          bfd_put_32 (output_bfd, (bfd_vma) new_addr, fixup_table);
676
          fixup_table += 4;
677
          bfd_put_32 (output_bfd, f->value + 2, fixup_table);
678
          fixup_table += 4;
679
        }
680
      else
681
        {
682
          bfd_put_32 (output_bfd, (bfd_vma) new_addr, fixup_table);
683
          fixup_table += 4;
684
          bfd_put_32 (output_bfd, f->value, fixup_table);
685
          fixup_table += 4;
686
        }
687
      ++fixups_written;
688
    }
689
 
690
  if (linux_hash_table (info)->local_builtins != 0)
691
    {
692
      /* Special marker so we know to switch to the other type of fixup */
693
      bfd_put_32 (output_bfd, (bfd_vma) 0, fixup_table);
694
      fixup_table += 4;
695
      bfd_put_32 (output_bfd, (bfd_vma) 0, fixup_table);
696
      fixup_table += 4;
697
      ++fixups_written;
698
      for (f = linux_hash_table (info)->fixup_list; f != NULL; f = f->next)
699
        {
700
          if (! f->builtin)
701
            continue;
702
 
703
          if (f->h->root.root.type != bfd_link_hash_defined
704
              && f->h->root.root.type != bfd_link_hash_defweak)
705
            {
706
              (*_bfd_error_handler)
707
                (_("Symbol %s not defined for fixups\n"),
708
                 f->h->root.root.root.string);
709
              continue;
710
            }
711
 
712
          is = f->h->root.root.u.def.section;
713
          section_offset = is->output_section->vma + is->output_offset;
714
          new_addr = f->h->root.root.u.def.value + section_offset;
715
 
716
#ifdef LINUX_LINK_DEBUG
717
          printf ("Fixup(B) %s: %x %x\n", f->h->root.root.string,
718
                  new_addr, f->value);
719
#endif
720
 
721
          bfd_put_32 (output_bfd, (bfd_vma) new_addr, fixup_table);
722
          fixup_table += 4;
723
          bfd_put_32 (output_bfd, f->value, fixup_table);
724
          fixup_table += 4;
725
          ++fixups_written;
726
        }
727
  }
728
 
729
  if (linux_hash_table (info)->fixup_count != fixups_written)
730
    {
731
      (*_bfd_error_handler) (_("Warning: fixup count mismatch\n"));
732
      while (linux_hash_table (info)->fixup_count > fixups_written)
733
        {
734
          bfd_put_32 (output_bfd, (bfd_vma) 0, fixup_table);
735
          fixup_table += 4;
736
          bfd_put_32 (output_bfd, (bfd_vma) 0, fixup_table);
737
          fixup_table += 4;
738
          ++fixups_written;
739
        }
740
    }
741
 
742
  h = linux_link_hash_lookup (linux_hash_table (info),
743
                              "__BUILTIN_FIXUPS__",
744
                              FALSE, FALSE, FALSE);
745
 
746
  if (h != NULL
747
      && (h->root.root.type == bfd_link_hash_defined
748
          || h->root.root.type == bfd_link_hash_defweak))
749
    {
750
      is = h->root.root.u.def.section;
751
      section_offset = is->output_section->vma + is->output_offset;
752
      new_addr = h->root.root.u.def.value + section_offset;
753
 
754
#ifdef LINUX_LINK_DEBUG
755
      printf ("Builtin fixup table at %x\n", new_addr);
756
#endif
757
 
758
      bfd_put_32 (output_bfd, (bfd_vma) new_addr, fixup_table);
759
    }
760
  else
761
    bfd_put_32 (output_bfd, (bfd_vma) 0, fixup_table);
762
 
763
  if (bfd_seek (output_bfd, (file_ptr) (os->filepos + s->output_offset),
764
                SEEK_SET) != 0)
765
    return FALSE;
766
 
767
  if (bfd_bwrite ((PTR) s->contents, s->size, output_bfd) != s->size)
768
    return FALSE;
769
 
770
  return TRUE;
771
}
772
 
773
#define MY_bfd_link_hash_table_create linux_link_hash_table_create
774
#define MY_add_one_symbol linux_add_one_symbol
775
#define MY_finish_dynamic_link linux_finish_dynamic_link
776
 
777
#define MY_zmagic_contiguous 1
778
 
779
#include "aout-target.h"

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.