1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
|
/* Linker file opening and searching.
Copyright 1991, 1992, 1993, 1994, 1995, 1998, 1999, 2000, 2001, 2002, 2003
Free Software Foundation, Inc.
This file is part of GLD, the Gnu Linker.
GLD is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GLD is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GLD; see the file COPYING. If not, write to the Free
Software Foundation, 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA. */
/* ldfile.c: look after all the file stuff. */
#include "bfd.h"
#include "sysdep.h"
#include "bfdlink.h"
#include "safe-ctype.h"
#include "ld.h"
#include "ldmisc.h"
#include "ldexp.h"
#include "ldlang.h"
#include "ldfile.h"
#include "ldmain.h"
#include <ldgram.h>
#include "ldlex.h"
#include "ldemul.h"
#include "libiberty.h"
#include "filenames.h"
const char * ldfile_input_filename;
bfd_boolean ldfile_assumed_script = FALSE;
const char * ldfile_output_machine_name = "";
unsigned long ldfile_output_machine;
enum bfd_architecture ldfile_output_architecture;
search_dirs_type * search_head;
#ifndef MPW
#ifdef VMS
char * slash = "";
#else
#if defined (_WIN32) && ! defined (__CYGWIN32__)
char * slash = "\\";
#else
char * slash = "/";
#endif
#endif
#else /* MPW */
/* The MPW path char is a colon. */
char * slash = ":";
#endif /* MPW */
typedef struct search_arch
{
char *name;
struct search_arch *next;
} search_arch_type;
static search_dirs_type **search_tail_ptr = &search_head;
static search_arch_type *search_arch_head;
static search_arch_type **search_arch_tail_ptr = &search_arch_head;
static FILE *try_open
PARAMS ((const char *, const char *));
static bfd_boolean is_sysrooted_pathname
PARAMS ((const char *, bfd_boolean));
/* Test whether a pathname, after canonicalization, is the same or a
sub-directory of the sysroot directory. */
static bfd_boolean
is_sysrooted_pathname (name, notsame)
const char *name;
bfd_boolean notsame;
{
char * realname = ld_canon_sysroot ? lrealpath (name) : NULL;
int len;
bfd_boolean result;
if (! realname)
return FALSE;
len = strlen (realname);
if (((! notsame && len == ld_canon_sysroot_len)
|| (len >= ld_canon_sysroot_len
&& IS_DIR_SEPARATOR (realname[ld_canon_sysroot_len])
&& (realname[ld_canon_sysroot_len] = '\0') == '\0'))
&& FILENAME_CMP (ld_canon_sysroot, realname) == 0)
result = TRUE;
else
result = FALSE;
if (realname)
free (realname);
return result;
}
/* Adds NAME to the library search path.
Makes a copy of NAME using xmalloc(). */
void
ldfile_add_library_path (name, cmdline)
const char *name;
bfd_boolean cmdline;
{
search_dirs_type *new;
if (!cmdline && config.only_cmd_line_lib_dirs)
return;
new = (search_dirs_type *) xmalloc (sizeof (search_dirs_type));
new->next = NULL;
new->cmdline = cmdline;
*search_tail_ptr = new;
search_tail_ptr = &new->next;
/* If a directory is marked as honoring sysroot, prepend the sysroot path
now. */
if (name[0] == '=')
{
new->name = concat (ld_sysroot, name + 1, NULL);
new->sysrooted = TRUE;
}
else
{
new->name = xstrdup (name);
new->sysrooted = is_sysrooted_pathname (name, FALSE);
}
}
/* Try to open a BFD for a lang_input_statement. */
bfd_boolean
ldfile_try_open_bfd (attempt, entry)
const char *attempt;
lang_input_statement_type *entry;
{
entry->the_bfd = bfd_openr (attempt, entry->target);
if (trace_file_tries)
{
if (entry->the_bfd == NULL)
info_msg (_("attempt to open %s failed\n"), attempt);
else
info_msg (_("attempt to open %s succeeded\n"), attempt);
}
if (entry->the_bfd == NULL)
{
if (bfd_get_error () == bfd_error_invalid_target)
einfo (_("%F%P: invalid BFD target `%s'\n"), entry->target);
return FALSE;
}
/* If we are searching for this file, see if the architecture is
compatible with the output file. If it isn't, keep searching.
If we can't open the file as an object file, stop the search
here. */
if (entry->search_dirs_flag)
{
bfd *check;
if (bfd_check_format (entry->the_bfd, bfd_archive))
check = bfd_openr_next_archived_file (entry->the_bfd, NULL);
else
check = entry->the_bfd;
if (check != NULL)
{
if (! bfd_check_format (check, bfd_object))
{
if (check == entry->the_bfd
&& bfd_get_error () == bfd_error_file_not_recognized
&& ! ldemul_unrecognized_file (entry))
{
int token, skip = 0;
char *arg, *arg1, *arg2, *arg3;
extern FILE *yyin;
/* Try to interpret the file as a linker script. */
ldfile_open_command_file (attempt);
ldfile_assumed_script = TRUE;
parser_input = input_selected;
ldlex_both ();
token = INPUT_SCRIPT;
while (token != 0)
{
switch (token)
{
case OUTPUT_FORMAT:
if ((token = yylex ()) != '(')
continue;
if ((token = yylex ()) != NAME)
continue;
arg1 = yylval.name;
arg2 = NULL;
arg3 = NULL;
token = yylex ();
if (token == ',')
{
if ((token = yylex ()) != NAME)
{
free (arg1);
continue;
}
arg2 = yylval.name;
if ((token = yylex ()) != ','
|| (token = yylex ()) != NAME)
{
free (arg1);
free (arg2);
continue;
}
arg3 = yylval.name;
token = yylex ();
}
if (token == ')')
{
switch (command_line.endian)
{
default:
case ENDIAN_UNSET:
arg = arg1; break;
case ENDIAN_BIG:
arg = arg2 ? arg2 : arg1; break;
case ENDIAN_LITTLE:
arg = arg3 ? arg3 : arg1; break;
}
if (strcmp (arg, lang_get_output_target ()) != 0)
skip = 1;
}
free (arg1);
if (arg2) free (arg2);
if (arg3) free (arg3);
break;
case NAME:
case LNAME:
case VERS_IDENTIFIER:
case VERS_TAG:
free (yylval.name);
break;
case INT:
if (yylval.bigint.str)
free (yylval.bigint.str);
break;
}
token = yylex ();
}
ldlex_popstate ();
ldfile_assumed_script = FALSE;
fclose (yyin);
yyin = NULL;
if (skip)
{
einfo (_("%P: skipping incompatible %s when searching for %s\n"),
attempt, entry->local_sym_name);
bfd_close (entry->the_bfd);
entry->the_bfd = NULL;
return FALSE;
}
}
return TRUE;
}
if ((bfd_arch_get_compatible (check, output_bfd,
command_line.accept_unknown_input_arch) == NULL)
/* XCOFF archives can have 32 and 64 bit objects. */
&& ! (bfd_get_flavour (check) == bfd_target_xcoff_flavour
&& bfd_get_flavour (output_bfd) == bfd_target_xcoff_flavour
&& bfd_check_format (entry->the_bfd, bfd_archive)))
{
einfo (_("%P: skipping incompatible %s when searching for %s\n"),
attempt, entry->local_sym_name);
bfd_close (entry->the_bfd);
entry->the_bfd = NULL;
return FALSE;
}
}
}
return TRUE;
}
/* Search for and open the file specified by ENTRY. If it is an
archive, use ARCH, LIB and SUFFIX to modify the file name. */
bfd_boolean
ldfile_open_file_search (arch, entry, lib, suffix)
const char *arch;
lang_input_statement_type *entry;
const char *lib;
const char *suffix;
{
search_dirs_type *search;
/* If this is not an archive, try to open it in the current
directory first. */
if (! entry->is_archive)
{
if (entry->sysrooted && IS_ABSOLUTE_PATH (entry->filename))
{
char *name = concat (ld_sysroot, entry->filename,
(const char *) NULL);
if (ldfile_try_open_bfd (name, entry))
{
entry->filename = name;
return TRUE;
}
free (name);
}
else if (ldfile_try_open_bfd (entry->filename, entry))
{
entry->sysrooted = IS_ABSOLUTE_PATH (entry->filename)
&& is_sysrooted_pathname (entry->filename, TRUE);
return TRUE;
}
if (IS_ABSOLUTE_PATH (entry->filename))
return FALSE;
}
for (search = search_head;
search != (search_dirs_type *) NULL;
search = search->next)
{
char *string;
if (entry->dynamic && ! link_info.relocatable)
{
if (ldemul_open_dynamic_archive (arch, search, entry))
{
entry->sysrooted = search->sysrooted;
return TRUE;
}
}
string = (char *) xmalloc (strlen (search->name)
+ strlen (slash)
+ strlen (lib)
+ strlen (entry->filename)
+ strlen (arch)
+ strlen (suffix)
+ 1);
if (entry->is_archive)
sprintf (string, "%s%s%s%s%s%s", search->name, slash,
lib, entry->filename, arch, suffix);
else
sprintf (string, "%s%s%s", search->name, slash, entry->filename);
if (ldfile_try_open_bfd (string, entry))
{
entry->filename = string;
entry->sysrooted = search->sysrooted;
return TRUE;
}
free (string);
}
return FALSE;
}
/* Open the input file specified by ENTRY. */
void
ldfile_open_file (entry)
lang_input_statement_type *entry;
{
if (entry->the_bfd != NULL)
return;
if (! entry->search_dirs_flag)
{
if (ldfile_try_open_bfd (entry->filename, entry))
return;
if (strcmp (entry->filename, entry->local_sym_name) != 0)
einfo (_("%F%P: cannot open %s for %s: %E\n"),
entry->filename, entry->local_sym_name);
else
einfo (_("%F%P: cannot open %s: %E\n"), entry->local_sym_name);
}
else
{
search_arch_type *arch;
bfd_boolean found = FALSE;
/* Try to open <filename><suffix> or lib<filename><suffix>.a */
for (arch = search_arch_head;
arch != (search_arch_type *) NULL;
arch = arch->next)
{
found = ldfile_open_file_search (arch->name, entry, "lib", ".a");
if (found)
break;
#ifdef VMS
found = ldfile_open_file_search (arch->name, entry, ":lib", ".a");
if (found)
break;
#endif
found = ldemul_find_potential_libraries (arch->name, entry);
if (found)
break;
}
/* If we have found the file, we don't need to search directories
again. */
if (found)
entry->search_dirs_flag = FALSE;
else if (entry->sysrooted
&& ld_sysroot
&& IS_ABSOLUTE_PATH (entry->local_sym_name))
einfo (_("%F%P: cannot find %s inside %s\n"),
entry->local_sym_name, ld_sysroot);
else
einfo (_("%F%P: cannot find %s\n"), entry->local_sym_name);
}
}
/* Try to open NAME; if that fails, try NAME with EXTEN appended to it. */
static FILE *
try_open (name, exten)
const char *name;
const char *exten;
{
FILE *result;
char buff[1000];
result = fopen (name, "r");
if (trace_file_tries)
{
if (result == NULL)
info_msg (_("cannot find script file %s\n"), name);
else
info_msg (_("opened script file %s\n"), name);
}
if (result != NULL)
return result;
if (*exten)
{
sprintf (buff, "%s%s", name, exten);
result = fopen (buff, "r");
if (trace_file_tries)
{
if (result == NULL)
info_msg (_("cannot find script file %s\n"), buff);
else
info_msg (_("opened script file %s\n"), buff);
}
}
return result;
}
/* Try to open NAME; if that fails, look for it in any directories
specified with -L, without and with EXTEND appended. */
FILE *
ldfile_find_command_file (name, extend)
const char *name;
const char *extend;
{
search_dirs_type *search;
FILE *result;
char buffer[1000];
/* First try raw name. */
result = try_open (name, "");
if (result == (FILE *) NULL)
{
/* Try now prefixes. */
for (search = search_head;
search != (search_dirs_type *) NULL;
search = search->next)
{
sprintf (buffer, "%s%s%s", search->name, slash, name);
result = try_open (buffer, extend);
if (result)
break;
}
}
return result;
}
void
ldfile_open_command_file (name)
const char *name;
{
FILE *ldlex_input_stack;
ldlex_input_stack = ldfile_find_command_file (name, "");
if (ldlex_input_stack == (FILE *) NULL)
{
bfd_set_error (bfd_error_system_call);
einfo (_("%P%F: cannot open linker script file %s: %E\n"), name);
}
lex_push_file (ldlex_input_stack, name);
ldfile_input_filename = name;
lineno = 1;
saved_script_handle = ldlex_input_stack;
}
#ifdef GNU960
static char *
gnu960_map_archname (name)
char *name;
{
struct tabentry { char *cmd_switch; char *arch; };
static struct tabentry arch_tab[] =
{
"", "",
"KA", "ka",
"KB", "kb",
"KC", "mc", /* Synonym for MC */
"MC", "mc",
"CA", "ca",
"SA", "ka", /* Functionally equivalent to KA */
"SB", "kb", /* Functionally equivalent to KB */
NULL, ""
};
struct tabentry *tp;
for (tp = arch_tab; tp->cmd_switch != NULL; tp++)
{
if (! strcmp (name,tp->cmd_switch))
break;
}
if (tp->cmd_switch == NULL)
einfo (_("%P%F: unknown architecture: %s\n"), name);
return tp->arch;
}
void
ldfile_add_arch (name)
char *name;
{
search_arch_type *new =
(search_arch_type *) xmalloc ((bfd_size_type) (sizeof (search_arch_type)));
if (*name != '\0')
{
if (ldfile_output_machine_name[0] != '\0')
{
einfo (_("%P%F: target architecture respecified\n"));
return;
}
ldfile_output_machine_name = name;
}
new->next = (search_arch_type *) NULL;
new->name = gnu960_map_archname (name);
*search_arch_tail_ptr = new;
search_arch_tail_ptr = &new->next;
}
#else /* not GNU960 */
void
ldfile_add_arch (in_name)
const char *in_name;
{
char *name = xstrdup (in_name);
search_arch_type *new =
(search_arch_type *) xmalloc (sizeof (search_arch_type));
ldfile_output_machine_name = in_name;
new->name = name;
new->next = (search_arch_type *) NULL;
while (*name)
{
*name = TOLOWER (*name);
name++;
}
*search_arch_tail_ptr = new;
search_arch_tail_ptr = &new->next;
}
#endif
/* Set the output architecture. */
void
ldfile_set_output_arch (string)
const char *string;
{
const bfd_arch_info_type *arch = bfd_scan_arch (string);
if (arch)
{
ldfile_output_architecture = arch->arch;
ldfile_output_machine = arch->mach;
ldfile_output_machine_name = arch->printable_name;
}
else
{
einfo (_("%P%F: cannot represent machine `%s'\n"), string);
}
}
|