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252b5132 1/* BFD back-end for linux flavored sparc a.out binaries.
93516ec3 2 Copyright 1992, 1993, 1994, 1995, 1996, 1997, 2000, 2001, 2002, 2003
5f771d47 3 Free Software Foundation, Inc.
252b5132
RH
4
5This file is part of BFD, the Binary File Descriptor library.
6
7This program is free software; you can redistribute it and/or modify
8it under the terms of the GNU General Public License as published by
9the Free Software Foundation; either version 2 of the License, or
10(at your option) any later version.
11
12This program is distributed in the hope that it will be useful,
13but WITHOUT ANY WARRANTY; without even the implied warranty of
14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15GNU General Public License for more details.
16
17You should have received a copy of the GNU General Public License
18along with this program; if not, write to the Free Software
19Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
20USA. */
21
b34976b6
AM
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
252b5132
RH
27
28#define MACHTYPE_OK(mtype) ((mtype) == M_SPARC || (mtype) == M_UNKNOWN)
29
30#include "bfd.h"
31#include "sysdep.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 DEFAULT_ARCH bfd_arch_sparc
e43d48cc
AM
39/* Do not "beautify" the CONCAT* macro args. Traditional C will not
40 remove whitespace added here, and thus will fail to concatenate
41 the tokens. */
42#define MY(OP) CONCAT2 (sparclinux_,OP)
252b5132
RH
43#define TARGETNAME "a.out-sparc-linux"
44
45extern const bfd_target MY(vec);
46
47/* We always generate QMAGIC files in preference to ZMAGIC files. It
48 would be possible to make this a linker option, if that ever
49 becomes important. */
50
51static void MY_final_link_callback
52 PARAMS ((bfd *, file_ptr *, file_ptr *, file_ptr *));
53
b34976b6 54static bfd_boolean sparclinux_bfd_final_link
252b5132
RH
55 PARAMS ((bfd *abfd, struct bfd_link_info *info));
56
b34976b6 57static bfd_boolean
252b5132
RH
58sparclinux_bfd_final_link (abfd, info)
59 bfd *abfd;
60 struct bfd_link_info *info;
61{
62 obj_aout_subformat (abfd) = q_magic_format;
63 return NAME(aout,final_link) (abfd, info, MY_final_link_callback);
64}
65
66#define MY_bfd_final_link sparclinux_bfd_final_link
67
68/* Set the machine type correctly. */
69
b34976b6 70static bfd_boolean sparclinux_write_object_contents PARAMS ((bfd *abfd));
252b5132 71
b34976b6 72static bfd_boolean
252b5132
RH
73sparclinux_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_SPARC);
80
81 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
82
83 WRITE_HEADERS(abfd, execp);
84
b34976b6 85 return TRUE;
252b5132
RH
86}
87
88#define MY_write_object_contents sparclinux_write_object_contents
89/* Code to link against Linux a.out shared libraries. */
90
91/* See if a symbol name is a reference to the global offset table. */
92
93#ifndef GOT_REF_PREFIX
b34976b6 94#define GOT_REF_PREFIX "__GOT_"
252b5132
RH
95#endif
96
97#define IS_GOT_SYM(name) \
98 (strncmp (name, GOT_REF_PREFIX, sizeof GOT_REF_PREFIX - 1) == 0)
99
7b82c249 100/* See if a symbol name is a reference to the procedure linkage table. */
252b5132
RH
101
102#ifndef PLT_REF_PREFIX
b34976b6 103#define PLT_REF_PREFIX "__PLT_"
252b5132
RH
104#endif
105
106#define IS_PLT_SYM(name) \
107 (strncmp (name, PLT_REF_PREFIX, sizeof PLT_REF_PREFIX - 1) == 0)
108
109/* This string is used to generate specialized error messages. */
110
111#ifndef NEEDS_SHRLIB
112#define NEEDS_SHRLIB "__NEEDS_SHRLIB_"
113#endif
114
115/* This special symbol is a set vector that contains a list of
116 pointers to fixup tables. It will be present in any dynamicly
117 linked file. The linker generated fixup table should also be added
118 to the list, and it should always appear in the second slot (the
119 first one is a dummy with a magic number that is defined in
120 crt0.o). */
121
122#ifndef SHARABLE_CONFLICTS
123#define SHARABLE_CONFLICTS "__SHARABLE_CONFLICTS__"
124#endif
125
126/* We keep a list of fixups. The terminology is a bit strange, but
127 each fixup contains two 32 bit numbers. A regular fixup contains
128 an address and a pointer, and at runtime we should store the
129 address at the location pointed to by the pointer. A builtin fixup
130 contains two pointers, and we should read the address using one
131 pointer and store it at the location pointed to by the other
132 pointer. Builtin fixups come into play when we have duplicate
133 __GOT__ symbols for the same variable. The builtin fixup will copy
134 the GOT pointer from one over into the other. */
135
136struct fixup
137{
138 struct fixup *next;
139 struct linux_link_hash_entry *h;
140 bfd_vma value;
141
142 /* Nonzero if this is a jump instruction that needs to be fixed,
143 zero if this is just a pointer */
144 char jump;
145
146 char builtin;
147};
148
149/* We don't need a special hash table entry structure, but we do need
150 to keep some information between linker passes, so we use a special
151 hash table. */
152
153struct linux_link_hash_entry
154{
155 struct aout_link_hash_entry root;
156};
157
158struct linux_link_hash_table
159{
160 struct aout_link_hash_table root;
161
162 /* First dynamic object found in link. */
163 bfd *dynobj;
164
165 /* Number of fixups. */
166 size_t fixup_count;
167
168 /* Number of builtin fixups. */
169 size_t local_builtins;
170
171 /* List of fixups. */
172 struct fixup *fixup_list;
173};
174
175static struct bfd_hash_entry *linux_link_hash_newfunc
176 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
177static struct bfd_link_hash_table *linux_link_hash_table_create
178 PARAMS ((bfd *));
179static struct fixup *new_fixup
180 PARAMS ((struct bfd_link_info *, struct linux_link_hash_entry *,
b34976b6
AM
181 bfd_vma, int));
182static bfd_boolean linux_link_create_dynamic_sections
252b5132 183 PARAMS ((bfd *, struct bfd_link_info *));
b34976b6 184static bfd_boolean linux_add_one_symbol
252b5132 185 PARAMS ((struct bfd_link_info *, bfd *, const char *, flagword, asection *,
b34976b6
AM
186 bfd_vma, const char *, bfd_boolean, bfd_boolean,
187 struct bfd_link_hash_entry **));
188static bfd_boolean linux_tally_symbols
252b5132 189 PARAMS ((struct linux_link_hash_entry *, PTR));
b34976b6 190static bfd_boolean linux_finish_dynamic_link
252b5132
RH
191 PARAMS ((bfd *, struct bfd_link_info *));
192
193/* Routine to create an entry in an Linux link hash table. */
194
195static struct bfd_hash_entry *
196linux_link_hash_newfunc (entry, table, string)
197 struct bfd_hash_entry *entry;
198 struct bfd_hash_table *table;
199 const char *string;
200{
201 struct linux_link_hash_entry *ret = (struct linux_link_hash_entry *) entry;
202
203 /* Allocate the structure if it has not already been allocated by a
204 subclass. */
205 if (ret == (struct linux_link_hash_entry *) NULL)
206 ret = ((struct linux_link_hash_entry *)
b34976b6 207 bfd_hash_allocate (table, sizeof (struct linux_link_hash_entry)));
252b5132
RH
208 if (ret == NULL)
209 return (struct bfd_hash_entry *) ret;
210
211 /* Call the allocation method of the superclass. */
212 ret = ((struct linux_link_hash_entry *)
b34976b6
AM
213 NAME(aout,link_hash_newfunc) ((struct bfd_hash_entry *) ret,
214 table, string));
252b5132
RH
215 if (ret != NULL)
216 {
217 /* Set local fields; there aren't any. */
218 }
219
220 return (struct bfd_hash_entry *) ret;
221}
222
223/* Create a Linux link hash table. */
224
225static struct bfd_link_hash_table *
226linux_link_hash_table_create (abfd)
227 bfd *abfd;
228{
229 struct linux_link_hash_table *ret;
dc810e39 230 bfd_size_type amt = sizeof (struct linux_link_hash_table);
252b5132 231
e2d34d7d 232 ret = (struct linux_link_hash_table *) bfd_malloc (amt);
252b5132
RH
233 if (ret == (struct linux_link_hash_table *) NULL)
234 return (struct bfd_link_hash_table *) NULL;
235 if (! NAME(aout,link_hash_table_init) (&ret->root, abfd,
b34976b6 236 linux_link_hash_newfunc))
252b5132
RH
237 {
238 free (ret);
239 return (struct bfd_link_hash_table *) NULL;
240 }
241
242 ret->dynobj = NULL;
243 ret->fixup_count = 0;
244 ret->local_builtins = 0;
245 ret->fixup_list = NULL;
246
247 return &ret->root.root;
248}
249
250/* Look up an entry in a Linux link hash table. */
251
252#define linux_link_hash_lookup(table, string, create, copy, follow) \
253 ((struct linux_link_hash_entry *) \
254 aout_link_hash_lookup (&(table)->root, (string), (create), (copy),\
b34976b6 255 (follow)))
252b5132
RH
256
257/* Traverse a Linux link hash table. */
258
b34976b6
AM
259#define linux_link_hash_traverse(table, func, info) \
260 (aout_link_hash_traverse \
261 (&(table)->root, \
262 (bfd_boolean (*) PARAMS ((struct aout_link_hash_entry *, PTR))) (func), \
252b5132
RH
263 (info)))
264
265/* Get the Linux link hash table from the info structure. This is
266 just a cast. */
267
268#define linux_hash_table(p) ((struct linux_link_hash_table *) ((p)->hash))
269
270/* Store the information for a new fixup. */
271
272static struct fixup *
273new_fixup (info, h, value, builtin)
274 struct bfd_link_info *info;
275 struct linux_link_hash_entry *h;
276 bfd_vma value;
277 int builtin;
278{
279 struct fixup *f;
280
281 f = (struct fixup *) bfd_hash_allocate (&info->hash->table,
b34976b6 282 sizeof (struct fixup));
252b5132
RH
283 if (f == NULL)
284 return f;
285 f->next = linux_hash_table (info)->fixup_list;
286 linux_hash_table (info)->fixup_list = f;
287 f->h = h;
288 f->value = value;
289 f->builtin = builtin;
290 f->jump = 0;
291 ++linux_hash_table (info)->fixup_count;
292 return f;
293}
294
295/* We come here once we realize that we are going to link to a shared
296 library. We need to create a special section that contains the
297 fixup table, and we ultimately need to add a pointer to this into
298 the set vector for SHARABLE_CONFLICTS. At this point we do not
299 know the size of the section, but that's OK - we just need to
300 create it for now. */
301
b34976b6 302static bfd_boolean
252b5132
RH
303linux_link_create_dynamic_sections (abfd, info)
304 bfd *abfd;
5f771d47 305 struct bfd_link_info *info ATTRIBUTE_UNUSED;
252b5132
RH
306{
307 flagword flags;
308 register asection *s;
309
310 /* Note that we set the SEC_IN_MEMORY flag. */
311 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY;
312
313 /* We choose to use the name ".linux-dynamic" for the fixup table.
b34976b6 314 Why not? */
252b5132
RH
315 s = bfd_make_section (abfd, ".linux-dynamic");
316 if (s == NULL
317 || ! bfd_set_section_flags (abfd, s, flags)
318 || ! bfd_set_section_alignment (abfd, s, 2))
b34976b6 319 return FALSE;
252b5132
RH
320 s->_raw_size = 0;
321 s->contents = 0;
322
b34976b6 323 return TRUE;
252b5132
RH
324}
325
326/* Function to add a single symbol to the linker hash table. This is
327 a wrapper around _bfd_generic_link_add_one_symbol which handles the
328 tweaking needed for dynamic linking support. */
329
b34976b6 330static bfd_boolean
252b5132 331linux_add_one_symbol (info, abfd, name, flags, section, value, string,
b34976b6 332 copy, collect, hashp)
252b5132
RH
333 struct bfd_link_info *info;
334 bfd *abfd;
335 const char *name;
336 flagword flags;
337 asection *section;
338 bfd_vma value;
339 const char *string;
b34976b6
AM
340 bfd_boolean copy;
341 bfd_boolean collect;
252b5132
RH
342 struct bfd_link_hash_entry **hashp;
343{
344 struct linux_link_hash_entry *h;
b34976b6 345 bfd_boolean insert;
252b5132
RH
346
347 /* Look up and see if we already have this symbol in the hash table.
348 If we do, and the defining entry is from a shared library, we
349 need to create the dynamic sections.
350
351 FIXME: What if abfd->xvec != info->hash->creator? We may want to
352 be able to link Linux a.out and ELF objects together, but serious
353 confusion is possible. */
354
b34976b6 355 insert = FALSE;
252b5132 356
1049f94e 357 if (! info->relocatable
252b5132
RH
358 && linux_hash_table (info)->dynobj == NULL
359 && strcmp (name, SHARABLE_CONFLICTS) == 0
360 && (flags & BSF_CONSTRUCTOR) != 0
361 && abfd->xvec == info->hash->creator)
362 {
363 if (! linux_link_create_dynamic_sections (abfd, info))
b34976b6 364 return FALSE;
252b5132 365 linux_hash_table (info)->dynobj = abfd;
b34976b6 366 insert = TRUE;
252b5132
RH
367 }
368
369 if (bfd_is_abs_section (section)
370 && abfd->xvec == info->hash->creator)
371 {
b34976b6
AM
372 h = linux_link_hash_lookup (linux_hash_table (info), name, FALSE,
373 FALSE, FALSE);
252b5132 374 if (h != NULL
b34976b6
AM
375 && (h->root.root.type == bfd_link_hash_defined
376 || h->root.root.type == bfd_link_hash_defweak))
377 {
378 struct fixup *f;
252b5132 379
b34976b6
AM
380 if (hashp != NULL)
381 *hashp = (struct bfd_link_hash_entry *) h;
252b5132 382
b34976b6
AM
383 f = new_fixup (info, h, value, ! IS_PLT_SYM (name));
384 if (f == NULL)
385 return FALSE;
386 f->jump = IS_PLT_SYM (name);
252b5132 387
b34976b6
AM
388 return TRUE;
389 }
252b5132
RH
390 }
391
392 /* Do the usual procedure for adding a symbol. */
393 if (! _bfd_generic_link_add_one_symbol (info, abfd, name, flags, section,
b34976b6
AM
394 value, string, copy, collect,
395 hashp))
396 return FALSE;
252b5132
RH
397
398 /* Insert a pointer to our table in the set vector. The dynamic
b34976b6 399 linker requires this information. */
252b5132
RH
400 if (insert)
401 {
402 asection *s;
403
404 /* Here we do our special thing to add the pointer to the
b34976b6 405 dynamic section in the SHARABLE_CONFLICTS set vector. */
252b5132 406 s = bfd_get_section_by_name (linux_hash_table (info)->dynobj,
b34976b6 407 ".linux-dynamic");
252b5132
RH
408 BFD_ASSERT (s != NULL);
409
410 if (! (_bfd_generic_link_add_one_symbol
b34976b6
AM
411 (info, linux_hash_table (info)->dynobj, SHARABLE_CONFLICTS,
412 BSF_GLOBAL | BSF_CONSTRUCTOR, s, (bfd_vma) 0, NULL,
413 FALSE, FALSE, NULL)))
414 return FALSE;
252b5132
RH
415 }
416
b34976b6 417 return TRUE;
252b5132
RH
418}
419
420/* We will crawl the hash table and come here for every global symbol.
421 We will examine each entry and see if there are indications that we
422 need to add a fixup. There are two possible cases - one is where
423 you have duplicate definitions of PLT or GOT symbols - these will
424 have already been caught and added as "builtin" fixups. If we find
425 that the corresponding non PLT/GOT symbol is also present, we
426 convert it to a regular fixup instead.
427
428 This function is called via linux_link_hash_traverse. */
429
b34976b6 430static bfd_boolean
252b5132
RH
431linux_tally_symbols (h, data)
432 struct linux_link_hash_entry *h;
433 PTR data;
434{
435 struct bfd_link_info *info = (struct bfd_link_info *) data;
436 struct fixup *f, *f1;
437 int is_plt;
438 struct linux_link_hash_entry *h1, *h2;
b34976b6 439 bfd_boolean exists;
252b5132 440
e92d460e
AM
441 if (h->root.root.type == bfd_link_hash_warning)
442 h = (struct linux_link_hash_entry *) h->root.root.u.i.link;
443
252b5132
RH
444 if (h->root.root.type == bfd_link_hash_undefined
445 && strncmp (h->root.root.root.string, NEEDS_SHRLIB,
b34976b6 446 sizeof NEEDS_SHRLIB - 1) == 0)
252b5132
RH
447 {
448 const char *name;
449 char *p;
450 char *alloc = NULL;
451
452 name = h->root.root.root.string + sizeof NEEDS_SHRLIB - 1;
453 p = strrchr (name, '_');
454 if (p != NULL)
b34976b6 455 alloc = (char *) bfd_malloc ((bfd_size_type) strlen (name) + 1);
252b5132
RH
456
457 if (p == NULL || alloc == NULL)
b34976b6
AM
458 (*_bfd_error_handler) (_("Output file requires shared library `%s'\n"),
459 name);
252b5132 460 else
b34976b6
AM
461 {
462 strcpy (alloc, name);
463 p = strrchr (alloc, '_');
464 *p++ = '\0';
465 (*_bfd_error_handler)
466 (_("Output file requires shared library `%s.so.%s'\n"),
467 alloc, p);
468 free (alloc);
469 }
252b5132
RH
470
471 abort ();
472 }
473
474 /* If this symbol is not a PLT/GOT, we do not even need to look at
475 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,
b34976b6
AM
481 and then again following all of the indirect links until we
482 reach a real symbol. */
252b5132 483 h1 = linux_link_hash_lookup (linux_hash_table (info),
b34976b6
AM
484 (h->root.root.root.string
485 + sizeof PLT_REF_PREFIX - 1),
486 FALSE, FALSE, TRUE);
7b82c249 487 /* h2 does not follow indirect symbols. */
252b5132 488 h2 = linux_link_hash_lookup (linux_hash_table (info),
b34976b6
AM
489 (h->root.root.root.string
490 + sizeof PLT_REF_PREFIX - 1),
491 FALSE, FALSE, FALSE);
252b5132
RH
492
493 /* The real symbol must exist but if it is also an ABS symbol,
b34976b6
AM
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 */
252b5132 499 if (h1 != NULL
b34976b6
AM
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 }
252b5132
RH
542
543 /* Quick and dirty way of stripping these symbols from the
b34976b6 544 symtab. */
252b5132 545 if (bfd_is_abs_section (h->root.root.u.def.section))
b34976b6 546 h->root.written = TRUE;
252b5132
RH
547 }
548
b34976b6 549 return TRUE;
252b5132
RH
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
b34976b6 558bfd_boolean
252b5132
RH
559bfd_sparclinux_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))
b34976b6 567 return TRUE;
252b5132 568
7b82c249 569 /* First find the fixups... */
252b5132 570 linux_link_hash_traverse (linux_hash_table (info),
b34976b6
AM
571 linux_tally_symbols,
572 (PTR) info);
252b5132
RH
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)
b34976b6
AM
580 {
581 ++linux_hash_table (info)->fixup_count;
582 ++linux_hash_table (info)->local_builtins;
583 break;
584 }
252b5132
RH
585 }
586
587 if (linux_hash_table (info)->dynobj == NULL)
588 {
589 if (linux_hash_table (info)->fixup_count > 0)
b34976b6
AM
590 abort ();
591 return TRUE;
252b5132
RH
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,
b34976b6 596 ".linux-dynamic");
252b5132
RH
597 if (s != NULL)
598 {
dc810e39
AM
599 s->_raw_size = linux_hash_table (info)->fixup_count + 1;
600 s->_raw_size *= 8;
9bab7074 601 s->contents = (bfd_byte *) bfd_zalloc (output_bfd, s->_raw_size);
252b5132 602 if (s->contents == NULL)
b34976b6 603 return FALSE;
252b5132
RH
604 }
605
b34976b6 606 return TRUE;
252b5132
RH
607}
608
609/* We come here once we are ready to actually write the fixup table to
610 the output file. Scan the fixup tables and so forth and generate
611 the stuff we need. */
612
b34976b6 613static bfd_boolean
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614linux_finish_dynamic_link (output_bfd, info)
615 bfd *output_bfd;
616 struct bfd_link_info *info;
617{
618 asection *s, *os, *is;
619 bfd_byte *fixup_table;
620 struct linux_link_hash_entry *h;
621 struct fixup *f;
622 unsigned int new_addr;
623 int section_offset;
624 unsigned int fixups_written;
625
626 if (linux_hash_table (info)->dynobj == NULL)
b34976b6 627 return TRUE;
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628
629 s = bfd_get_section_by_name (linux_hash_table (info)->dynobj,
b34976b6 630 ".linux-dynamic");
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631 BFD_ASSERT (s != NULL);
632 os = s->output_section;
633 fixups_written = 0;
634
635#ifdef LINUX_LINK_DEBUG
636 printf ("Fixup table file offset: %x VMA: %x\n",
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637 os->filepos + s->output_offset,
638 os->vma + s->output_offset);
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639#endif
640
641 fixup_table = s->contents;
dc810e39
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642 bfd_put_32 (output_bfd,
643 (bfd_vma) linux_hash_table (info)->fixup_count, fixup_table);
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644 fixup_table += 4;
645
646 /* Fill in fixup table. */
647 for (f = linux_hash_table (info)->fixup_list; f != NULL; f = f->next)
648 {
649 if (f->builtin)
b34976b6 650 continue;
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651
652 if (f->h->root.root.type != bfd_link_hash_defined
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653 && f->h->root.root.type != bfd_link_hash_defweak)
654 {
655 (*_bfd_error_handler)
656 (_("Symbol %s not defined for fixups\n"),
657 f->h->root.root.root.string);
658 continue;
659 }
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660
661 is = f->h->root.root.u.def.section;
662 section_offset = is->output_section->vma + is->output_offset;
663 new_addr = f->h->root.root.u.def.value + section_offset;
664
665#ifdef LINUX_LINK_DEBUG
666 printf ("Fixup(%d) %s: %x %x\n",f->jump, f->h->root.root.string,
b34976b6 667 new_addr, f->value);
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668#endif
669
670 if (f->jump)
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671 {
672 /* Relative address */
673 new_addr = new_addr - (f->value + 5);
674 bfd_put_32 (output_bfd, (bfd_vma) new_addr, fixup_table);
675 fixup_table += 4;
676 bfd_put_32 (output_bfd, f->value + 1, fixup_table);
677 fixup_table += 4;
678 }
252b5132 679 else
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680 {
681 bfd_put_32 (output_bfd, (bfd_vma) new_addr, fixup_table);
682 fixup_table += 4;
683 bfd_put_32 (output_bfd, f->value, fixup_table);
684 fixup_table += 4;
685 }
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686 ++fixups_written;
687 }
688
689 if (linux_hash_table (info)->local_builtins != 0)
690 {
691 /* Special marker so we know to switch to the other type of fixup */
dc810e39 692 bfd_put_32 (output_bfd, (bfd_vma) 0, fixup_table);
252b5132 693 fixup_table += 4;
dc810e39 694 bfd_put_32 (output_bfd, (bfd_vma) 0, fixup_table);
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695 fixup_table += 4;
696 ++fixups_written;
697 for (f = linux_hash_table (info)->fixup_list; f != NULL; f = f->next)
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698 {
699 if (! f->builtin)
700 continue;
701
702 if (f->h->root.root.type != bfd_link_hash_defined
703 && f->h->root.root.type != bfd_link_hash_defweak)
704 {
705 (*_bfd_error_handler)
706 (_("Symbol %s not defined for fixups\n"),
707 f->h->root.root.root.string);
708 continue;
709 }
710
711 is = f->h->root.root.u.def.section;
712 section_offset = is->output_section->vma + is->output_offset;
713 new_addr = f->h->root.root.u.def.value + section_offset;
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714
715#ifdef LINUX_LINK_DEBUG
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716 printf ("Fixup(B) %s: %x %x\n", f->h->root.root.string,
717 new_addr, f->value);
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718#endif
719
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720 bfd_put_32 (output_bfd, (bfd_vma) new_addr, fixup_table);
721 fixup_table += 4;
722 bfd_put_32 (output_bfd, f->value, fixup_table);
723 fixup_table += 4;
724 ++fixups_written;
725 }
726 }
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727
728 if (linux_hash_table (info)->fixup_count != fixups_written)
729 {
730 (*_bfd_error_handler) (_("Warning: fixup count mismatch\n"));
731 while (linux_hash_table (info)->fixup_count > fixups_written)
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732 {
733 bfd_put_32 (output_bfd, (bfd_vma) 0, fixup_table);
734 fixup_table += 4;
735 bfd_put_32 (output_bfd, (bfd_vma) 0, fixup_table);
736 fixup_table += 4;
737 ++fixups_written;
738 }
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739 }
740
741 h = linux_link_hash_lookup (linux_hash_table (info),
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742 "__BUILTIN_FIXUPS__",
743 FALSE, FALSE, FALSE);
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744
745 if (h != NULL
746 && (h->root.root.type == bfd_link_hash_defined
b34976b6 747 || h->root.root.type == bfd_link_hash_defweak))
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748 {
749 is = h->root.root.u.def.section;
750 section_offset = is->output_section->vma + is->output_offset;
751 new_addr = h->root.root.u.def.value + section_offset;
752
753#ifdef LINUX_LINK_DEBUG
754 printf ("Builtin fixup table at %x\n", new_addr);
755#endif
756
dc810e39 757 bfd_put_32 (output_bfd, (bfd_vma) new_addr, fixup_table);
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758 }
759 else
dc810e39 760 bfd_put_32 (output_bfd, (bfd_vma) 0, fixup_table);
252b5132 761
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762 if (bfd_seek (output_bfd, (file_ptr) (os->filepos + s->output_offset),
763 SEEK_SET) != 0)
b34976b6 764 return FALSE;
252b5132 765
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766 if (bfd_bwrite ((PTR) s->contents, s->_raw_size, output_bfd) != s->_raw_size)
767 return FALSE;
252b5132 768
b34976b6 769 return TRUE;
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770}
771
772#define MY_bfd_link_hash_table_create linux_link_hash_table_create
773#define MY_add_one_symbol linux_add_one_symbol
774#define MY_finish_dynamic_link linux_finish_dynamic_link
775
776#define MY_zmagic_contiguous 1
777
778#include "aout-target.h"