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[/] [open8_urisc/] [trunk/] [gnu/] [binutils/] [binutils/] [coffgrok.c] - Blame information for rev 255

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/* coffgrok.c
2
   Copyright 1994, 1995, 1997, 1998, 2000, 2001, 2002, 2003, 2004, 2005,
3
   2007, 2009  Free Software Foundation, Inc.
4
 
5
   This file is part of GNU Binutils.
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
 
23
/* Written by Steve Chamberlain (sac@cygnus.com)
24
 
25
   This module reads a coff file and builds a really simple type tree
26
   which can be read by other programs.  The first application is a
27
   coff->sysroff converter.  It can be tested with coffdump.c.  */
28
 
29
#include "sysdep.h"
30
#include "bfd.h"
31
#include "libiberty.h"
32
 
33
#include "coff/internal.h"
34
#include "../bfd/libcoff.h"
35
#include "bucomm.h"
36
#include "coffgrok.h"
37
 
38
static int lofile = 1;
39
static struct coff_scope *top_scope;
40
static struct coff_scope *file_scope;
41
static struct coff_ofile *ofile;
42
 
43
static struct coff_symbol *last_function_symbol;
44
static struct coff_type *last_function_type;
45
static struct coff_type *last_struct;
46
static struct coff_type *last_enum;
47
static struct coff_sfile *cur_sfile;
48
 
49
static struct coff_symbol **tindex;
50
 
51
 
52
static asymbol **syms;
53
static long symcount;
54
 
55
#define N(x) ((x)->_n._n_nptr[1])
56
 
57
static struct coff_ptr_struct *rawsyms;
58
static int rawcount;
59
static bfd *abfd;
60
 
61
#define PTR_SIZE        4
62
#define SHORT_SIZE      2
63
#define INT_SIZE        4
64
#define LONG_SIZE       4
65
#define FLOAT_SIZE      4
66
#define DOUBLE_SIZE     8
67
 
68
#define INDEXOF(p)  ((struct coff_ptr_struct *)(p)-(rawsyms))
69
 
70
static struct coff_scope *empty_scope (void);
71
static struct coff_symbol *empty_symbol (void);
72
static void push_scope (int);
73
static void pop_scope (void);
74
static void do_sections_p1 (struct coff_ofile *);
75
static void do_sections_p2 (struct coff_ofile *);
76
static struct coff_where *do_where (int);
77
static struct coff_line *do_lines (int, char *);
78
static struct coff_type *do_type (int);
79
static struct coff_visible *do_visible (int);
80
static int do_define (int, struct coff_scope *);
81
static struct coff_ofile *doit (void);
82
 
83
static struct coff_scope *
84
empty_scope (void)
85
{
86
  struct coff_scope *l;
87
  l = (struct coff_scope *) (xcalloc (sizeof (struct coff_scope), 1));
88
  return l;
89
}
90
 
91
static struct coff_symbol *
92
empty_symbol (void)
93
{
94
  return (struct coff_symbol *) (xcalloc (sizeof (struct coff_symbol), 1));
95
}
96
 
97
/*int l;*/
98
static void
99
push_scope (int slink)
100
{
101
  struct coff_scope *n = empty_scope ();
102
 
103
  if (slink)
104
    {
105
      if (top_scope)
106
        {
107
          if (top_scope->list_tail)
108
            {
109
              top_scope->list_tail->next = n;
110
            }
111
          else
112
            {
113
              top_scope->list_head = n;
114
            }
115
          top_scope->list_tail = n;
116
        }
117
    }
118
  n->parent = top_scope;
119
 
120
  top_scope = n;
121
}
122
 
123
static void
124
pop_scope (void)
125
{
126
  top_scope = top_scope->parent;
127
}
128
 
129
static void
130
do_sections_p1 (struct coff_ofile *head)
131
{
132
  asection *section;
133
  int idx;
134
  struct coff_section *all = (struct coff_section *) (xcalloc (abfd->section_count + 1,
135
                                             sizeof (struct coff_section)));
136
  head->nsections = abfd->section_count + 1;
137
  head->sections = all;
138
 
139
  for (idx = 0, section = abfd->sections; section; section = section->next, idx++)
140
    {
141
      long relsize;
142
      int i = section->target_index;
143
      arelent **relpp;
144
      long relcount;
145
 
146
      relsize = bfd_get_reloc_upper_bound (abfd, section);
147
      if (relsize < 0)
148
        bfd_fatal (bfd_get_filename (abfd));
149
      if (relsize == 0)
150
        continue;
151
      relpp = (arelent **) xmalloc (relsize);
152
      relcount = bfd_canonicalize_reloc (abfd, section, relpp, syms);
153
      if (relcount < 0)
154
        bfd_fatal (bfd_get_filename (abfd));
155
 
156
      head->sections[i].name = (char *) (section->name);
157
      head->sections[i].code = section->flags & SEC_CODE;
158
      head->sections[i].data = section->flags & SEC_DATA;
159
      if (strcmp (section->name, ".bss") == 0)
160
        head->sections[i].data = 1;
161
      head->sections[i].address = section->lma;
162
      head->sections[i].size = bfd_get_section_size (section);
163
      head->sections[i].number = idx;
164
      head->sections[i].nrelocs = section->reloc_count;
165
      head->sections[i].relocs =
166
        (struct coff_reloc *) (xcalloc (section->reloc_count,
167
                                        sizeof (struct coff_reloc)));
168
      head->sections[i].bfd_section = section;
169
    }
170
  head->sections[0].name = "ABSOLUTE";
171
  head->sections[0].code = 0;
172
  head->sections[0].data = 0;
173
  head->sections[0].address = 0;
174
  head->sections[0].size = 0;
175
  head->sections[0].number = 0;
176
}
177
 
178
static void
179
do_sections_p2 (struct coff_ofile *head)
180
{
181
  asection *section;
182
  for (section = abfd->sections; section; section = section->next)
183
    {
184
      unsigned int j;
185
 
186
      for (j = 0; j < section->reloc_count; j++)
187
        {
188
          int idx;
189
          int i = section->target_index;
190
          struct coff_reloc *r = head->sections[i].relocs + j;
191
          arelent *sr = section->relocation + j;
192
          r->offset = sr->address;
193
          r->addend = sr->addend;
194
          idx = ((coff_symbol_type *) (sr->sym_ptr_ptr[0]))->native - rawsyms;
195
          r->symbol = tindex[idx];
196
        }
197
    }
198
}
199
 
200
static struct coff_where *
201
do_where (int i)
202
{
203
  struct internal_syment *sym = &rawsyms[i].u.syment;
204
  struct coff_where *where =
205
    (struct coff_where *) (xmalloc (sizeof (struct coff_where)));
206
  where->offset = sym->n_value;
207
 
208
  if (sym->n_scnum == -1)
209
    sym->n_scnum = 0;
210
 
211
  switch (sym->n_sclass)
212
    {
213
    case C_FIELD:
214
      where->where = coff_where_member_of_struct;
215
      where->offset = sym->n_value / 8;
216
      where->bitoffset = sym->n_value % 8;
217
      where->bitsize = rawsyms[i + 1].u.auxent.x_sym.x_misc.x_lnsz.x_size;
218
      break;
219
    case C_MOE:
220
      where->where = coff_where_member_of_enum;
221
      break;
222
    case C_MOS:
223
    case C_MOU:
224
      where->where = coff_where_member_of_struct;
225
      break;
226
    case C_AUTO:
227
    case C_ARG:
228
      where->where = coff_where_stack;
229
      break;
230
    case C_EXT:
231
    case C_STAT:
232
    case C_EXTDEF:
233
    case C_LABEL:
234
      where->where = coff_where_memory;
235
      where->section = &ofile->sections[sym->n_scnum];
236
      break;
237
    case C_REG:
238
    case C_REGPARM:
239
      where->where = coff_where_register;
240
      break;
241
    case C_ENTAG:
242
      where->where = coff_where_entag;
243
      break;
244
    case C_STRTAG:
245
    case C_UNTAG:
246
      where->where = coff_where_strtag;
247
      break;
248
    case C_TPDEF:
249
      where->where = coff_where_typedef;
250
      break;
251
    default:
252
      abort ();
253
      break;
254
    }
255
  return where;
256
}
257
 
258
static
259
struct coff_line *
260
do_lines (int i, char *name ATTRIBUTE_UNUSED)
261
{
262
  struct coff_line *res = (struct coff_line *) xcalloc (sizeof (struct coff_line), 1);
263
  asection *s;
264
  unsigned int l;
265
 
266
  /* Find out if this function has any line numbers in the table */
267
  for (s = abfd->sections; s; s = s->next)
268
    {
269
      for (l = 0; l < s->lineno_count; l++)
270
        {
271
          if (s->lineno[l].line_number == 0)
272
            {
273
              if (rawsyms + i == ((coff_symbol_type *) (&(s->lineno[l].u.sym[0])))->native)
274
                {
275
                  /* These lines are for this function - so count them and stick them on */
276
                  int c = 0;
277
                  /* Find the linenumber of the top of the function, since coff linenumbers
278
                     are relative to the start of the function.  */
279
                  int start_line = rawsyms[i + 3].u.auxent.x_sym.x_misc.x_lnsz.x_lnno;
280
 
281
                  l++;
282
                  for (c = 0; s->lineno[l + c + 1].line_number; c++)
283
                    ;
284
 
285
                  /* Add two extra records, one for the prologue and one for the epilogue */
286
                  c += 1;
287
                  res->nlines = c;
288
                  res->lines = (int *) (xcalloc (sizeof (int), c));
289
                  res->addresses = (int *) (xcalloc (sizeof (int), c));
290
                  res->lines[0] = start_line;
291
                  res->addresses[0] = rawsyms[i].u.syment.n_value - s->vma;
292
                  for (c = 0; s->lineno[l + c + 1].line_number; c++)
293
                    {
294
                      res->lines[c + 1] = s->lineno[l + c].line_number + start_line - 1;
295
                      res->addresses[c + 1] = s->lineno[l + c].u.offset;
296
                    }
297
                  return res;
298
                }
299
            }
300
        }
301
    }
302
  return res;
303
}
304
 
305
static
306
struct coff_type *
307
do_type (int i)
308
{
309
  struct internal_syment *sym = &rawsyms[i].u.syment;
310
  union internal_auxent *aux = &rawsyms[i + 1].u.auxent;
311
  struct coff_type *res =
312
    (struct coff_type *) xmalloc (sizeof (struct coff_type));
313
  int type = sym->n_type;
314
  int which_dt = 0;
315
  int dimind = 0;
316
 
317
  res->type = coff_basic_type;
318
  res->u.basic = type & 0xf;
319
 
320
  switch (type & 0xf)
321
    {
322
    case T_NULL:
323
    case T_VOID:
324
      if (sym->n_numaux && sym->n_sclass == C_STAT)
325
        {
326
          /* This is probably a section definition */
327
          res->type = coff_secdef_type;
328
          res->size = aux->x_scn.x_scnlen;
329
        }
330
      else
331
        {
332
          if (type == 0)
333
            {
334
              /* Don't know what this is, let's make it a simple int */
335
              res->size = INT_SIZE;
336
              res->u.basic = T_UINT;
337
            }
338
          else
339
            {
340
              /* Else it could be a function or pointer to void */
341
              res->size = 0;
342
            }
343
        }
344
      break;
345
 
346
 
347
      break;
348
    case T_UCHAR:
349
    case T_CHAR:
350
      res->size = 1;
351
      break;
352
    case T_USHORT:
353
    case T_SHORT:
354
      res->size = SHORT_SIZE;
355
      break;
356
    case T_UINT:
357
    case T_INT:
358
      res->size = INT_SIZE;
359
      break;
360
    case T_ULONG:
361
    case T_LONG:
362
      res->size = LONG_SIZE;
363
      break;
364
    case T_FLOAT:
365
      res->size = FLOAT_SIZE;
366
      break;
367
    case T_DOUBLE:
368
      res->size = DOUBLE_SIZE;
369
      break;
370
    case T_STRUCT:
371
    case T_UNION:
372
      if (sym->n_numaux)
373
        {
374
          if (aux->x_sym.x_tagndx.p)
375
            {
376
              /* Referring to a struct defined elsewhere */
377
              res->type = coff_structref_type;
378
              res->u.astructref.ref = tindex[INDEXOF (aux->x_sym.x_tagndx.p)];
379
              res->size = res->u.astructref.ref ?
380
                res->u.astructref.ref->type->size : 0;
381
            }
382
          else
383
            {
384
              /* A definition of a struct */
385
              last_struct = res;
386
              res->type = coff_structdef_type;
387
              res->u.astructdef.elements = empty_scope ();
388
              res->u.astructdef.idx = 0;
389
              res->u.astructdef.isstruct = (type & 0xf) == T_STRUCT;
390
              res->size = aux->x_sym.x_misc.x_lnsz.x_size;
391
            }
392
        }
393
      else
394
        {
395
          /* No auxents - it's anonymous */
396
          res->type = coff_structref_type;
397
          res->u.astructref.ref = 0;
398
          res->size = 0;
399
        }
400
      break;
401
    case T_ENUM:
402
      if (aux->x_sym.x_tagndx.p)
403
        {
404
          /* Referring to a enum defined elsewhere */
405
          res->type = coff_enumref_type;
406
          res->u.aenumref.ref = tindex[INDEXOF (aux->x_sym.x_tagndx.p)];
407
          res->size = res->u.aenumref.ref->type->size;
408
        }
409
      else
410
        {
411
          /* A definition of an enum */
412
          last_enum = res;
413
          res->type = coff_enumdef_type;
414
          res->u.aenumdef.elements = empty_scope ();
415
          res->size = aux->x_sym.x_misc.x_lnsz.x_size;
416
        }
417
      break;
418
    case T_MOE:
419
      break;
420
    }
421
 
422
  for (which_dt = 5; which_dt >= 0; which_dt--)
423
    {
424
      switch ((type >> ((which_dt * 2) + 4)) & 0x3)
425
        {
426
        case 0:
427
          break;
428
        case DT_ARY:
429
          {
430
            struct coff_type *ptr = ((struct coff_type *)
431
                                     xmalloc (sizeof (struct coff_type)));
432
            int els = (dimind < DIMNUM
433
                       ? aux->x_sym.x_fcnary.x_ary.x_dimen[dimind]
434
                       : 0);
435
            ++dimind;
436
            ptr->type = coff_array_type;
437
            ptr->size = els * res->size;
438
            ptr->u.array.dim = els;
439
            ptr->u.array.array_of = res;
440
            res = ptr;
441
            break;
442
          }
443
        case DT_PTR:
444
          {
445
            struct coff_type *ptr =
446
              (struct coff_type *) xmalloc (sizeof (struct coff_type));
447
            ptr->size = PTR_SIZE;
448
            ptr->type = coff_pointer_type;
449
            ptr->u.pointer.points_to = res;
450
            res = ptr;
451
            break;
452
          }
453
        case DT_FCN:
454
          {
455
            struct coff_type *ptr
456
              = (struct coff_type *) xmalloc (sizeof (struct coff_type));
457
            ptr->size = 0;
458
            ptr->type = coff_function_type;
459
            ptr->u.function.function_returns = res;
460
            ptr->u.function.parameters = empty_scope ();
461
            ptr->u.function.lines = do_lines (i, sym->_n._n_nptr[1]);
462
            ptr->u.function.code = 0;
463
            last_function_type = ptr;
464
            res = ptr;
465
            break;
466
          }
467
        }
468
    }
469
  return res;
470
}
471
 
472
static struct coff_visible *
473
do_visible (int i)
474
{
475
  struct internal_syment *sym = &rawsyms[i].u.syment;
476
  struct coff_visible *visible =
477
    (struct coff_visible *) (xmalloc (sizeof (struct coff_visible)));
478
  enum coff_vis_type t;
479
  switch (sym->n_sclass)
480
    {
481
    case C_MOS:
482
    case C_MOU:
483
    case C_FIELD:
484
      t = coff_vis_member_of_struct;
485
      break;
486
    case C_MOE:
487
      t = coff_vis_member_of_enum;
488
      break;
489
 
490
    case C_REGPARM:
491
      t = coff_vis_regparam;
492
      break;
493
 
494
    case C_REG:
495
      t = coff_vis_register;
496
      break;
497
    case C_STRTAG:
498
    case C_UNTAG:
499
    case C_ENTAG:
500
    case C_TPDEF:
501
      t = coff_vis_tag;
502
      break;
503
    case C_AUTOARG:
504
    case C_ARG:
505
      t = coff_vis_autoparam;
506
      break;
507
    case C_AUTO:
508
 
509
 
510
      t = coff_vis_auto;
511
      break;
512
    case C_LABEL:
513
    case C_STAT:
514
      t = coff_vis_int_def;
515
      break;
516
    case C_EXT:
517
      if (sym->n_scnum == N_UNDEF)
518
        {
519
          if (sym->n_value)
520
            t = coff_vis_common;
521
          else
522
            t = coff_vis_ext_ref;
523
        }
524
      else
525
        t = coff_vis_ext_def;
526
      break;
527
    default:
528
      abort ();
529
      break;
530
 
531
    }
532
  visible->type = t;
533
  return visible;
534
}
535
 
536
static int
537
do_define (int i, struct coff_scope *b)
538
{
539
  static int symbol_index;
540
  struct internal_syment *sym = &rawsyms[i].u.syment;
541
 
542
  /* Define a symbol and attach to block b */
543
  struct coff_symbol *s = empty_symbol ();
544
 
545
  s->number = ++symbol_index;
546
  s->name = sym->_n._n_nptr[1];
547
  s->sfile = cur_sfile;
548
  /* Glue onto the ofile list */
549
  if (lofile >= 0)
550
    {
551
      if (ofile->symbol_list_tail)
552
        ofile->symbol_list_tail->next_in_ofile_list = s;
553
      else
554
        ofile->symbol_list_head = s;
555
      ofile->symbol_list_tail = s;
556
      /* And the block list */
557
    }
558
  if (b->vars_tail)
559
    b->vars_tail->next = s;
560
  else
561
    b->vars_head = s;
562
 
563
  b->vars_tail = s;
564
  b->nvars++;
565
  s->type = do_type (i);
566
  s->where = do_where (i);
567
  s->visible = do_visible (i);
568
 
569
  tindex[i] = s;
570
 
571
  /* We remember the lowest address in each section for each source file */
572
 
573
  if (s->where->where == coff_where_memory
574
      && s->type->type == coff_secdef_type)
575
    {
576
      struct coff_isection *is = cur_sfile->section + s->where->section->number;
577
 
578
      if (!is->init)
579
        {
580
          is->low = s->where->offset;
581
          is->high = s->where->offset + s->type->size;
582
          is->init = 1;
583
          is->parent = s->where->section;
584
        }
585
 
586
    }
587
 
588
  if (s->type->type == coff_function_type)
589
    last_function_symbol = s;
590
 
591
  return i + sym->n_numaux + 1;
592
}
593
 
594
 
595
static
596
struct coff_ofile *
597
doit (void)
598
{
599
  int i;
600
  int infile = 0;
601
  struct coff_ofile *head =
602
    (struct coff_ofile *) xmalloc (sizeof (struct coff_ofile));
603
  ofile = head;
604
  head->source_head = 0;
605
  head->source_tail = 0;
606
  head->nsources = 0;
607
  head->symbol_list_tail = 0;
608
  head->symbol_list_head = 0;
609
  do_sections_p1 (head);
610
  push_scope (1);
611
 
612
  for (i = 0; i < rawcount;)
613
    {
614
      struct internal_syment *sym = &rawsyms[i].u.syment;
615
      switch (sym->n_sclass)
616
        {
617
        case C_FILE:
618
          {
619
            /* new source file announced */
620
            struct coff_sfile *n =
621
              (struct coff_sfile *) xmalloc (sizeof (struct coff_sfile));
622
            n->section = (struct coff_isection *) xcalloc (sizeof (struct coff_isection), abfd->section_count + 1);
623
            cur_sfile = n;
624
            n->name = sym->_n._n_nptr[1];
625
            n->next = 0;
626
 
627
            if (infile)
628
              {
629
                pop_scope ();
630
              }
631
            infile = 1;
632
            push_scope (1);
633
            file_scope = n->scope = top_scope;
634
 
635
            if (head->source_tail)
636
              head->source_tail->next = n;
637
            else
638
              head->source_head = n;
639
            head->source_tail = n;
640
            head->nsources++;
641
            i += sym->n_numaux + 1;
642
          }
643
          break;
644
        case C_FCN:
645
          {
646
            char *name = sym->_n._n_nptr[1];
647
            if (name[1] == 'b')
648
              {
649
                /* Function start */
650
                push_scope (0);
651
                last_function_type->u.function.code = top_scope;
652
                top_scope->sec = ofile->sections + sym->n_scnum;
653
                top_scope->offset = sym->n_value;
654
              }
655
            else
656
              {
657
                top_scope->size = sym->n_value - top_scope->offset + 1;
658
                pop_scope ();
659
 
660
              }
661
            i += sym->n_numaux + 1;
662
          }
663
          break;
664
 
665
        case C_BLOCK:
666
          {
667
            char *name = sym->_n._n_nptr[1];
668
            if (name[1] == 'b')
669
              {
670
                /* Block start */
671
                push_scope (1);
672
                top_scope->sec = ofile->sections + sym->n_scnum;
673
                top_scope->offset = sym->n_value;
674
 
675
              }
676
            else
677
              {
678
                top_scope->size = sym->n_value - top_scope->offset + 1;
679
                pop_scope ();
680
              }
681
            i += sym->n_numaux + 1;
682
          }
683
          break;
684
        case C_REGPARM:
685
        case C_ARG:
686
          i = do_define (i, last_function_symbol->type->u.function.parameters);
687
          break;
688
        case C_MOS:
689
        case C_MOU:
690
        case C_FIELD:
691
          i = do_define (i, last_struct->u.astructdef.elements);
692
          break;
693
        case C_MOE:
694
          i = do_define (i, last_enum->u.aenumdef.elements);
695
          break;
696
        case C_STRTAG:
697
        case C_ENTAG:
698
        case C_UNTAG:
699
          /* Various definition */
700
          i = do_define (i, top_scope);
701
          break;
702
        case C_EXT:
703
        case C_LABEL:
704
          i = do_define (i, file_scope);
705
          break;
706
        case C_STAT:
707
        case C_TPDEF:
708
        case C_AUTO:
709
        case C_REG:
710
          i = do_define (i, top_scope);
711
          break;
712
        default:
713
          abort ();
714
        case C_EOS:
715
          i += sym->n_numaux + 1;
716
          break;
717
        }
718
    }
719
  do_sections_p2 (head);
720
  return head;
721
}
722
 
723
struct coff_ofile *
724
coff_grok (bfd *inabfd)
725
{
726
  long storage;
727
  struct coff_ofile *p;
728
  abfd = inabfd;
729
  storage = bfd_get_symtab_upper_bound (abfd);
730
 
731
  if (storage < 0)
732
    bfd_fatal (abfd->filename);
733
 
734
  syms = (asymbol **) xmalloc (storage);
735
  symcount = bfd_canonicalize_symtab (abfd, syms);
736
  if (symcount < 0)
737
    bfd_fatal (abfd->filename);
738
  rawsyms = obj_raw_syments (abfd);
739
  rawcount = obj_raw_syment_count (abfd);;
740
  tindex = (struct coff_symbol **) (xcalloc (sizeof (struct coff_symbol *), rawcount));
741
 
742
  p = doit ();
743
  return p;
744
}

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