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* elf-m10300.c (_bfd_mn10300_elf_adjust_dynamic_symbol): Warn on
[deliverable/binutils-gdb.git] / bfd / elf-m10300.c
1 /* Matsushita 10300 specific support for 32-bit ELF
2 Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
3 Free Software Foundation, Inc.
4
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 2 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, MA 02110-1301, USA. */
20
21 #include "bfd.h"
22 #include "sysdep.h"
23 #include "libbfd.h"
24 #include "elf-bfd.h"
25 #include "elf/mn10300.h"
26
27 static bfd_reloc_status_type mn10300_elf_final_link_relocate
28 PARAMS ((reloc_howto_type *, bfd *, bfd *, asection *, bfd_byte *,
29 bfd_vma, bfd_vma, bfd_vma,
30 struct elf_link_hash_entry *, unsigned long, struct bfd_link_info *,
31 asection *, int));
32 static bfd_boolean mn10300_elf_relocate_section
33 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
34 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
35 static bfd_boolean mn10300_elf_relax_section
36 PARAMS ((bfd *, asection *, struct bfd_link_info *, bfd_boolean *));
37 static bfd_byte * mn10300_elf_get_relocated_section_contents
38 PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_order *,
39 bfd_byte *, bfd_boolean, asymbol **));
40 static unsigned long elf_mn10300_mach
41 PARAMS ((flagword));
42 void _bfd_mn10300_elf_final_write_processing
43 PARAMS ((bfd *, bfd_boolean));
44 bfd_boolean _bfd_mn10300_elf_object_p
45 PARAMS ((bfd *));
46 bfd_boolean _bfd_mn10300_elf_merge_private_bfd_data
47 PARAMS ((bfd *,bfd *));
48
49 /* The mn10300 linker needs to keep track of the number of relocs that
50 it decides to copy in check_relocs for each symbol. This is so
51 that it can discard PC relative relocs if it doesn't need them when
52 linking with -Bsymbolic. We store the information in a field
53 extending the regular ELF linker hash table. */
54
55 struct elf32_mn10300_link_hash_entry {
56 /* The basic elf link hash table entry. */
57 struct elf_link_hash_entry root;
58
59 /* For function symbols, the number of times this function is
60 called directly (ie by name). */
61 unsigned int direct_calls;
62
63 /* For function symbols, the size of this function's stack
64 (if <= 255 bytes). We stuff this into "call" instructions
65 to this target when it's valid and profitable to do so.
66
67 This does not include stack allocated by movm! */
68 unsigned char stack_size;
69
70 /* For function symbols, arguments (if any) for movm instruction
71 in the prologue. We stuff this value into "call" instructions
72 to the target when it's valid and profitable to do so. */
73 unsigned char movm_args;
74
75 /* For function symbols, the amount of stack space that would be allocated
76 by the movm instruction. This is redundant with movm_args, but we
77 add it to the hash table to avoid computing it over and over. */
78 unsigned char movm_stack_size;
79
80 /* When set, convert all "call" instructions to this target into "calls"
81 instructions. */
82 #define MN10300_CONVERT_CALL_TO_CALLS 0x1
83
84 /* Used to mark functions which have had redundant parts of their
85 prologue deleted. */
86 #define MN10300_DELETED_PROLOGUE_BYTES 0x2
87 unsigned char flags;
88 };
89
90 /* We derive a hash table from the main elf linker hash table so
91 we can store state variables and a secondary hash table without
92 resorting to global variables. */
93 struct elf32_mn10300_link_hash_table {
94 /* The main hash table. */
95 struct elf_link_hash_table root;
96
97 /* A hash table for static functions. We could derive a new hash table
98 instead of using the full elf32_mn10300_link_hash_table if we wanted
99 to save some memory. */
100 struct elf32_mn10300_link_hash_table *static_hash_table;
101
102 /* Random linker state flags. */
103 #define MN10300_HASH_ENTRIES_INITIALIZED 0x1
104 char flags;
105 };
106
107 /* For MN10300 linker hash table. */
108
109 /* Get the MN10300 ELF linker hash table from a link_info structure. */
110
111 #define elf32_mn10300_hash_table(p) \
112 ((struct elf32_mn10300_link_hash_table *) ((p)->hash))
113
114 #define elf32_mn10300_link_hash_traverse(table, func, info) \
115 (elf_link_hash_traverse \
116 (&(table)->root, \
117 (bfd_boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
118 (info)))
119
120 static struct bfd_hash_entry *elf32_mn10300_link_hash_newfunc
121 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
122 static struct bfd_link_hash_table *elf32_mn10300_link_hash_table_create
123 PARAMS ((bfd *));
124 static void elf32_mn10300_link_hash_table_free
125 PARAMS ((struct bfd_link_hash_table *));
126
127 static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
128 PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
129 static void mn10300_info_to_howto
130 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
131 static bfd_boolean mn10300_elf_check_relocs
132 PARAMS ((bfd *, struct bfd_link_info *, asection *,
133 const Elf_Internal_Rela *));
134 static asection *mn10300_elf_gc_mark_hook
135 PARAMS ((asection *, struct bfd_link_info *info, Elf_Internal_Rela *,
136 struct elf_link_hash_entry *, Elf_Internal_Sym *));
137 static bfd_boolean mn10300_elf_relax_delete_bytes
138 PARAMS ((bfd *, asection *, bfd_vma, int));
139 static bfd_boolean mn10300_elf_symbol_address_p
140 PARAMS ((bfd *, asection *, Elf_Internal_Sym *, bfd_vma));
141 static bfd_boolean elf32_mn10300_finish_hash_table_entry
142 PARAMS ((struct bfd_hash_entry *, PTR));
143 static void compute_function_info
144 PARAMS ((bfd *, struct elf32_mn10300_link_hash_entry *,
145 bfd_vma, unsigned char *));
146
147 static bfd_boolean _bfd_mn10300_elf_create_got_section
148 PARAMS ((bfd *, struct bfd_link_info *));
149 static bfd_boolean _bfd_mn10300_elf_create_dynamic_sections
150 PARAMS ((bfd *, struct bfd_link_info *));
151 static bfd_boolean _bfd_mn10300_elf_adjust_dynamic_symbol
152 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
153 static bfd_boolean _bfd_mn10300_elf_size_dynamic_sections
154 PARAMS ((bfd *, struct bfd_link_info *));
155 static bfd_boolean _bfd_mn10300_elf_finish_dynamic_symbol
156 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
157 Elf_Internal_Sym *));
158 static bfd_boolean _bfd_mn10300_elf_finish_dynamic_sections
159 PARAMS ((bfd *, struct bfd_link_info *));
160
161 static reloc_howto_type elf_mn10300_howto_table[] = {
162 /* Dummy relocation. Does nothing. */
163 HOWTO (R_MN10300_NONE,
164 0,
165 2,
166 16,
167 FALSE,
168 0,
169 complain_overflow_bitfield,
170 bfd_elf_generic_reloc,
171 "R_MN10300_NONE",
172 FALSE,
173 0,
174 0,
175 FALSE),
176 /* Standard 32 bit reloc. */
177 HOWTO (R_MN10300_32,
178 0,
179 2,
180 32,
181 FALSE,
182 0,
183 complain_overflow_bitfield,
184 bfd_elf_generic_reloc,
185 "R_MN10300_32",
186 FALSE,
187 0xffffffff,
188 0xffffffff,
189 FALSE),
190 /* Standard 16 bit reloc. */
191 HOWTO (R_MN10300_16,
192 0,
193 1,
194 16,
195 FALSE,
196 0,
197 complain_overflow_bitfield,
198 bfd_elf_generic_reloc,
199 "R_MN10300_16",
200 FALSE,
201 0xffff,
202 0xffff,
203 FALSE),
204 /* Standard 8 bit reloc. */
205 HOWTO (R_MN10300_8,
206 0,
207 0,
208 8,
209 FALSE,
210 0,
211 complain_overflow_bitfield,
212 bfd_elf_generic_reloc,
213 "R_MN10300_8",
214 FALSE,
215 0xff,
216 0xff,
217 FALSE),
218 /* Standard 32bit pc-relative reloc. */
219 HOWTO (R_MN10300_PCREL32,
220 0,
221 2,
222 32,
223 TRUE,
224 0,
225 complain_overflow_bitfield,
226 bfd_elf_generic_reloc,
227 "R_MN10300_PCREL32",
228 FALSE,
229 0xffffffff,
230 0xffffffff,
231 TRUE),
232 /* Standard 16bit pc-relative reloc. */
233 HOWTO (R_MN10300_PCREL16,
234 0,
235 1,
236 16,
237 TRUE,
238 0,
239 complain_overflow_bitfield,
240 bfd_elf_generic_reloc,
241 "R_MN10300_PCREL16",
242 FALSE,
243 0xffff,
244 0xffff,
245 TRUE),
246 /* Standard 8 pc-relative reloc. */
247 HOWTO (R_MN10300_PCREL8,
248 0,
249 0,
250 8,
251 TRUE,
252 0,
253 complain_overflow_bitfield,
254 bfd_elf_generic_reloc,
255 "R_MN10300_PCREL8",
256 FALSE,
257 0xff,
258 0xff,
259 TRUE),
260
261 /* GNU extension to record C++ vtable hierarchy */
262 HOWTO (R_MN10300_GNU_VTINHERIT, /* type */
263 0, /* rightshift */
264 0, /* size (0 = byte, 1 = short, 2 = long) */
265 0, /* bitsize */
266 FALSE, /* pc_relative */
267 0, /* bitpos */
268 complain_overflow_dont, /* complain_on_overflow */
269 NULL, /* special_function */
270 "R_MN10300_GNU_VTINHERIT", /* name */
271 FALSE, /* partial_inplace */
272 0, /* src_mask */
273 0, /* dst_mask */
274 FALSE), /* pcrel_offset */
275
276 /* GNU extension to record C++ vtable member usage */
277 HOWTO (R_MN10300_GNU_VTENTRY, /* type */
278 0, /* rightshift */
279 0, /* size (0 = byte, 1 = short, 2 = long) */
280 0, /* bitsize */
281 FALSE, /* pc_relative */
282 0, /* bitpos */
283 complain_overflow_dont, /* complain_on_overflow */
284 NULL, /* special_function */
285 "R_MN10300_GNU_VTENTRY", /* name */
286 FALSE, /* partial_inplace */
287 0, /* src_mask */
288 0, /* dst_mask */
289 FALSE), /* pcrel_offset */
290
291 /* Standard 24 bit reloc. */
292 HOWTO (R_MN10300_24,
293 0,
294 2,
295 24,
296 FALSE,
297 0,
298 complain_overflow_bitfield,
299 bfd_elf_generic_reloc,
300 "R_MN10300_24",
301 FALSE,
302 0xffffff,
303 0xffffff,
304 FALSE),
305 HOWTO (R_MN10300_GOTPC32, /* type */
306 0, /* rightshift */
307 2, /* size (0 = byte, 1 = short, 2 = long) */
308 32, /* bitsize */
309 TRUE, /* pc_relative */
310 0, /* bitpos */
311 complain_overflow_bitfield, /* complain_on_overflow */
312 bfd_elf_generic_reloc, /* */
313 "R_MN10300_GOTPC32", /* name */
314 FALSE, /* partial_inplace */
315 0xffffffff, /* src_mask */
316 0xffffffff, /* dst_mask */
317 TRUE), /* pcrel_offset */
318
319 HOWTO (R_MN10300_GOTPC16, /* type */
320 0, /* rightshift */
321 1, /* size (0 = byte, 1 = short, 2 = long) */
322 16, /* bitsize */
323 TRUE, /* pc_relative */
324 0, /* bitpos */
325 complain_overflow_bitfield, /* complain_on_overflow */
326 bfd_elf_generic_reloc, /* */
327 "R_MN10300_GOTPC16", /* name */
328 FALSE, /* partial_inplace */
329 0xffff, /* src_mask */
330 0xffff, /* dst_mask */
331 TRUE), /* pcrel_offset */
332
333 HOWTO (R_MN10300_GOTOFF32, /* type */
334 0, /* rightshift */
335 2, /* size (0 = byte, 1 = short, 2 = long) */
336 32, /* bitsize */
337 FALSE, /* pc_relative */
338 0, /* bitpos */
339 complain_overflow_bitfield, /* complain_on_overflow */
340 bfd_elf_generic_reloc, /* */
341 "R_MN10300_GOTOFF32", /* name */
342 FALSE, /* partial_inplace */
343 0xffffffff, /* src_mask */
344 0xffffffff, /* dst_mask */
345 FALSE), /* pcrel_offset */
346
347 HOWTO (R_MN10300_GOTOFF24, /* type */
348 0, /* rightshift */
349 2, /* size (0 = byte, 1 = short, 2 = long) */
350 24, /* bitsize */
351 FALSE, /* pc_relative */
352 0, /* bitpos */
353 complain_overflow_bitfield, /* complain_on_overflow */
354 bfd_elf_generic_reloc, /* */
355 "R_MN10300_GOTOFF24", /* name */
356 FALSE, /* partial_inplace */
357 0xffffff, /* src_mask */
358 0xffffff, /* dst_mask */
359 FALSE), /* pcrel_offset */
360
361 HOWTO (R_MN10300_GOTOFF16, /* type */
362 0, /* rightshift */
363 1, /* size (0 = byte, 1 = short, 2 = long) */
364 16, /* bitsize */
365 FALSE, /* pc_relative */
366 0, /* bitpos */
367 complain_overflow_bitfield, /* complain_on_overflow */
368 bfd_elf_generic_reloc, /* */
369 "R_MN10300_GOTOFF16", /* name */
370 FALSE, /* partial_inplace */
371 0xffff, /* src_mask */
372 0xffff, /* dst_mask */
373 FALSE), /* pcrel_offset */
374
375 HOWTO (R_MN10300_PLT32, /* type */
376 0, /* rightshift */
377 2, /* size (0 = byte, 1 = short, 2 = long) */
378 32, /* bitsize */
379 TRUE, /* pc_relative */
380 0, /* bitpos */
381 complain_overflow_bitfield, /* complain_on_overflow */
382 bfd_elf_generic_reloc, /* */
383 "R_MN10300_PLT32", /* name */
384 FALSE, /* partial_inplace */
385 0xffffffff, /* src_mask */
386 0xffffffff, /* dst_mask */
387 TRUE), /* pcrel_offset */
388
389 HOWTO (R_MN10300_PLT16, /* type */
390 0, /* rightshift */
391 1, /* size (0 = byte, 1 = short, 2 = long) */
392 16, /* bitsize */
393 TRUE, /* pc_relative */
394 0, /* bitpos */
395 complain_overflow_bitfield, /* complain_on_overflow */
396 bfd_elf_generic_reloc, /* */
397 "R_MN10300_PLT16", /* name */
398 FALSE, /* partial_inplace */
399 0xffff, /* src_mask */
400 0xffff, /* dst_mask */
401 TRUE), /* pcrel_offset */
402
403 HOWTO (R_MN10300_GOT32, /* type */
404 0, /* rightshift */
405 2, /* size (0 = byte, 1 = short, 2 = long) */
406 32, /* bitsize */
407 FALSE, /* pc_relative */
408 0, /* bitpos */
409 complain_overflow_bitfield, /* complain_on_overflow */
410 bfd_elf_generic_reloc, /* */
411 "R_MN10300_GOT32", /* name */
412 FALSE, /* partial_inplace */
413 0xffffffff, /* src_mask */
414 0xffffffff, /* dst_mask */
415 FALSE), /* pcrel_offset */
416
417 HOWTO (R_MN10300_GOT24, /* type */
418 0, /* rightshift */
419 2, /* size (0 = byte, 1 = short, 2 = long) */
420 24, /* bitsize */
421 FALSE, /* pc_relative */
422 0, /* bitpos */
423 complain_overflow_bitfield, /* complain_on_overflow */
424 bfd_elf_generic_reloc, /* */
425 "R_MN10300_GOT24", /* name */
426 FALSE, /* partial_inplace */
427 0xffffffff, /* src_mask */
428 0xffffffff, /* dst_mask */
429 FALSE), /* pcrel_offset */
430
431 HOWTO (R_MN10300_GOT16, /* type */
432 0, /* rightshift */
433 1, /* size (0 = byte, 1 = short, 2 = long) */
434 16, /* bitsize */
435 FALSE, /* pc_relative */
436 0, /* bitpos */
437 complain_overflow_bitfield, /* complain_on_overflow */
438 bfd_elf_generic_reloc, /* */
439 "R_MN10300_GOT16", /* name */
440 FALSE, /* partial_inplace */
441 0xffffffff, /* src_mask */
442 0xffffffff, /* dst_mask */
443 FALSE), /* pcrel_offset */
444
445 HOWTO (R_MN10300_COPY, /* type */
446 0, /* rightshift */
447 2, /* size (0 = byte, 1 = short, 2 = long) */
448 32, /* bitsize */
449 FALSE, /* pc_relative */
450 0, /* bitpos */
451 complain_overflow_bitfield, /* complain_on_overflow */
452 bfd_elf_generic_reloc, /* */
453 "R_MN10300_COPY", /* name */
454 FALSE, /* partial_inplace */
455 0xffffffff, /* src_mask */
456 0xffffffff, /* dst_mask */
457 FALSE), /* pcrel_offset */
458
459 HOWTO (R_MN10300_GLOB_DAT, /* type */
460 0, /* rightshift */
461 2, /* size (0 = byte, 1 = short, 2 = long) */
462 32, /* bitsize */
463 FALSE, /* pc_relative */
464 0, /* bitpos */
465 complain_overflow_bitfield, /* complain_on_overflow */
466 bfd_elf_generic_reloc, /* */
467 "R_MN10300_GLOB_DAT", /* name */
468 FALSE, /* partial_inplace */
469 0xffffffff, /* src_mask */
470 0xffffffff, /* dst_mask */
471 FALSE), /* pcrel_offset */
472
473 HOWTO (R_MN10300_JMP_SLOT, /* type */
474 0, /* rightshift */
475 2, /* size (0 = byte, 1 = short, 2 = long) */
476 32, /* bitsize */
477 FALSE, /* pc_relative */
478 0, /* bitpos */
479 complain_overflow_bitfield, /* complain_on_overflow */
480 bfd_elf_generic_reloc, /* */
481 "R_MN10300_JMP_SLOT", /* name */
482 FALSE, /* partial_inplace */
483 0xffffffff, /* src_mask */
484 0xffffffff, /* dst_mask */
485 FALSE), /* pcrel_offset */
486
487 HOWTO (R_MN10300_RELATIVE, /* type */
488 0, /* rightshift */
489 2, /* size (0 = byte, 1 = short, 2 = long) */
490 32, /* bitsize */
491 FALSE, /* pc_relative */
492 0, /* bitpos */
493 complain_overflow_bitfield, /* complain_on_overflow */
494 bfd_elf_generic_reloc, /* */
495 "R_MN10300_RELATIVE", /* name */
496 FALSE, /* partial_inplace */
497 0xffffffff, /* src_mask */
498 0xffffffff, /* dst_mask */
499 FALSE), /* pcrel_offset */
500
501 };
502
503 struct mn10300_reloc_map {
504 bfd_reloc_code_real_type bfd_reloc_val;
505 unsigned char elf_reloc_val;
506 };
507
508 static const struct mn10300_reloc_map mn10300_reloc_map[] = {
509 { BFD_RELOC_NONE, R_MN10300_NONE, },
510 { BFD_RELOC_32, R_MN10300_32, },
511 { BFD_RELOC_16, R_MN10300_16, },
512 { BFD_RELOC_8, R_MN10300_8, },
513 { BFD_RELOC_32_PCREL, R_MN10300_PCREL32, },
514 { BFD_RELOC_16_PCREL, R_MN10300_PCREL16, },
515 { BFD_RELOC_8_PCREL, R_MN10300_PCREL8, },
516 { BFD_RELOC_24, R_MN10300_24, },
517 { BFD_RELOC_VTABLE_INHERIT, R_MN10300_GNU_VTINHERIT },
518 { BFD_RELOC_VTABLE_ENTRY, R_MN10300_GNU_VTENTRY },
519 { BFD_RELOC_32_GOT_PCREL, R_MN10300_GOTPC32 },
520 { BFD_RELOC_16_GOT_PCREL, R_MN10300_GOTPC16 },
521 { BFD_RELOC_32_GOTOFF, R_MN10300_GOTOFF32 },
522 { BFD_RELOC_MN10300_GOTOFF24, R_MN10300_GOTOFF24 },
523 { BFD_RELOC_16_GOTOFF, R_MN10300_GOTOFF16 },
524 { BFD_RELOC_32_PLT_PCREL, R_MN10300_PLT32 },
525 { BFD_RELOC_16_PLT_PCREL, R_MN10300_PLT16 },
526 { BFD_RELOC_MN10300_GOT32, R_MN10300_GOT32 },
527 { BFD_RELOC_MN10300_GOT24, R_MN10300_GOT24 },
528 { BFD_RELOC_MN10300_GOT16, R_MN10300_GOT16 },
529 { BFD_RELOC_MN10300_COPY, R_MN10300_COPY },
530 { BFD_RELOC_MN10300_GLOB_DAT, R_MN10300_GLOB_DAT },
531 { BFD_RELOC_MN10300_JMP_SLOT, R_MN10300_JMP_SLOT },
532 { BFD_RELOC_MN10300_RELATIVE, R_MN10300_RELATIVE },
533 };
534
535 /* Create the GOT section. */
536
537 static bfd_boolean
538 _bfd_mn10300_elf_create_got_section (abfd, info)
539 bfd * abfd;
540 struct bfd_link_info * info;
541 {
542 flagword flags;
543 flagword pltflags;
544 asection * s;
545 struct elf_link_hash_entry * h;
546 const struct elf_backend_data * bed = get_elf_backend_data (abfd);
547 int ptralign;
548
549 /* This function may be called more than once. */
550 if (bfd_get_section_by_name (abfd, ".got") != NULL)
551 return TRUE;
552
553 switch (bed->s->arch_size)
554 {
555 case 32:
556 ptralign = 2;
557 break;
558
559 case 64:
560 ptralign = 3;
561 break;
562
563 default:
564 bfd_set_error (bfd_error_bad_value);
565 return FALSE;
566 }
567
568 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
569 | SEC_LINKER_CREATED);
570
571 pltflags = flags;
572 pltflags |= SEC_CODE;
573 if (bed->plt_not_loaded)
574 pltflags &= ~ (SEC_LOAD | SEC_HAS_CONTENTS);
575 if (bed->plt_readonly)
576 pltflags |= SEC_READONLY;
577
578 s = bfd_make_section_with_flags (abfd, ".plt", pltflags);
579 if (s == NULL
580 || ! bfd_set_section_alignment (abfd, s, bed->plt_alignment))
581 return FALSE;
582
583 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
584 .plt section. */
585 if (bed->want_plt_sym
586 && !_bfd_elf_define_linkage_sym (abfd, info, s,
587 "_PROCEDURE_LINKAGE_TABLE_"))
588 return FALSE;
589
590 s = bfd_make_section_with_flags (abfd, ".got", flags);
591 if (s == NULL
592 || ! bfd_set_section_alignment (abfd, s, ptralign))
593 return FALSE;
594
595 if (bed->want_got_plt)
596 {
597 s = bfd_make_section_with_flags (abfd, ".got.plt", flags);
598 if (s == NULL
599 || ! bfd_set_section_alignment (abfd, s, ptralign))
600 return FALSE;
601 }
602
603 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
604 (or .got.plt) section. We don't do this in the linker script
605 because we don't want to define the symbol if we are not creating
606 a global offset table. */
607 h = _bfd_elf_define_linkage_sym (abfd, info, s, "_GLOBAL_OFFSET_TABLE_");
608 elf_hash_table (info)->hgot = h;
609 if (h == NULL)
610 return FALSE;
611
612 /* The first bit of the global offset table is the header. */
613 s->size += bed->got_header_size;
614
615 return TRUE;
616 }
617
618 static reloc_howto_type *
619 bfd_elf32_bfd_reloc_type_lookup (abfd, code)
620 bfd *abfd ATTRIBUTE_UNUSED;
621 bfd_reloc_code_real_type code;
622 {
623 unsigned int i;
624
625 for (i = 0;
626 i < sizeof (mn10300_reloc_map) / sizeof (struct mn10300_reloc_map);
627 i++)
628 {
629 if (mn10300_reloc_map[i].bfd_reloc_val == code)
630 return &elf_mn10300_howto_table[mn10300_reloc_map[i].elf_reloc_val];
631 }
632
633 return NULL;
634 }
635
636 /* Set the howto pointer for an MN10300 ELF reloc. */
637
638 static void
639 mn10300_info_to_howto (abfd, cache_ptr, dst)
640 bfd *abfd ATTRIBUTE_UNUSED;
641 arelent *cache_ptr;
642 Elf_Internal_Rela *dst;
643 {
644 unsigned int r_type;
645
646 r_type = ELF32_R_TYPE (dst->r_info);
647 BFD_ASSERT (r_type < (unsigned int) R_MN10300_MAX);
648 cache_ptr->howto = &elf_mn10300_howto_table[r_type];
649 }
650
651 /* Look through the relocs for a section during the first phase.
652 Since we don't do .gots or .plts, we just need to consider the
653 virtual table relocs for gc. */
654
655 static bfd_boolean
656 mn10300_elf_check_relocs (abfd, info, sec, relocs)
657 bfd *abfd;
658 struct bfd_link_info *info;
659 asection *sec;
660 const Elf_Internal_Rela *relocs;
661 {
662 Elf_Internal_Shdr *symtab_hdr;
663 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
664 const Elf_Internal_Rela *rel;
665 const Elf_Internal_Rela *rel_end;
666 bfd * dynobj;
667 bfd_vma * local_got_offsets;
668 asection * sgot;
669 asection * srelgot;
670 asection * sreloc;
671
672 sgot = NULL;
673 srelgot = NULL;
674 sreloc = NULL;
675
676 if (info->relocatable)
677 return TRUE;
678
679 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
680 sym_hashes = elf_sym_hashes (abfd);
681 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym);
682 if (!elf_bad_symtab (abfd))
683 sym_hashes_end -= symtab_hdr->sh_info;
684
685 dynobj = elf_hash_table (info)->dynobj;
686 local_got_offsets = elf_local_got_offsets (abfd);
687 rel_end = relocs + sec->reloc_count;
688 for (rel = relocs; rel < rel_end; rel++)
689 {
690 struct elf_link_hash_entry *h;
691 unsigned long r_symndx;
692
693 r_symndx = ELF32_R_SYM (rel->r_info);
694 if (r_symndx < symtab_hdr->sh_info)
695 h = NULL;
696 else
697 {
698 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
699 while (h->root.type == bfd_link_hash_indirect
700 || h->root.type == bfd_link_hash_warning)
701 h = (struct elf_link_hash_entry *) h->root.u.i.link;
702 }
703
704 /* Some relocs require a global offset table. */
705 if (dynobj == NULL)
706 {
707 switch (ELF32_R_TYPE (rel->r_info))
708 {
709 case R_MN10300_GOT32:
710 case R_MN10300_GOT24:
711 case R_MN10300_GOT16:
712 case R_MN10300_GOTOFF32:
713 case R_MN10300_GOTOFF24:
714 case R_MN10300_GOTOFF16:
715 case R_MN10300_GOTPC32:
716 case R_MN10300_GOTPC16:
717 elf_hash_table (info)->dynobj = dynobj = abfd;
718 if (! _bfd_mn10300_elf_create_got_section (dynobj, info))
719 return FALSE;
720 break;
721
722 default:
723 break;
724 }
725 }
726
727 switch (ELF32_R_TYPE (rel->r_info))
728 {
729 /* This relocation describes the C++ object vtable hierarchy.
730 Reconstruct it for later use during GC. */
731 case R_MN10300_GNU_VTINHERIT:
732 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
733 return FALSE;
734 break;
735
736 /* This relocation describes which C++ vtable entries are actually
737 used. Record for later use during GC. */
738 case R_MN10300_GNU_VTENTRY:
739 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
740 return FALSE;
741 break;
742 case R_MN10300_GOT32:
743 case R_MN10300_GOT24:
744 case R_MN10300_GOT16:
745 /* This symbol requires a global offset table entry. */
746
747 if (sgot == NULL)
748 {
749 sgot = bfd_get_section_by_name (dynobj, ".got");
750 BFD_ASSERT (sgot != NULL);
751 }
752
753 if (srelgot == NULL
754 && (h != NULL || info->shared))
755 {
756 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
757 if (srelgot == NULL)
758 {
759 srelgot = bfd_make_section_with_flags (dynobj,
760 ".rela.got",
761 (SEC_ALLOC
762 | SEC_LOAD
763 | SEC_HAS_CONTENTS
764 | SEC_IN_MEMORY
765 | SEC_LINKER_CREATED
766 | SEC_READONLY));
767 if (srelgot == NULL
768 || ! bfd_set_section_alignment (dynobj, srelgot, 2))
769 return FALSE;
770 }
771 }
772
773 if (h != NULL)
774 {
775 if (h->got.offset != (bfd_vma) -1)
776 /* We have already allocated space in the .got. */
777 break;
778
779 h->got.offset = sgot->size;
780
781 /* Make sure this symbol is output as a dynamic symbol. */
782 if (h->dynindx == -1)
783 {
784 if (! bfd_elf_link_record_dynamic_symbol (info, h))
785 return FALSE;
786 }
787
788 srelgot->size += sizeof (Elf32_External_Rela);
789 }
790 else
791 {
792 /* This is a global offset table entry for a local
793 symbol. */
794 if (local_got_offsets == NULL)
795 {
796 size_t size;
797 unsigned int i;
798
799 size = symtab_hdr->sh_info * sizeof (bfd_vma);
800 local_got_offsets = (bfd_vma *) bfd_alloc (abfd, size);
801
802 if (local_got_offsets == NULL)
803 return FALSE;
804 elf_local_got_offsets (abfd) = local_got_offsets;
805
806 for (i = 0; i < symtab_hdr->sh_info; i++)
807 local_got_offsets[i] = (bfd_vma) -1;
808 }
809
810 if (local_got_offsets[r_symndx] != (bfd_vma) -1)
811 /* We have already allocated space in the .got. */
812 break;
813
814 local_got_offsets[r_symndx] = sgot->size;
815
816 if (info->shared)
817 /* If we are generating a shared object, we need to
818 output a R_MN10300_RELATIVE reloc so that the dynamic
819 linker can adjust this GOT entry. */
820 srelgot->size += sizeof (Elf32_External_Rela);
821 }
822
823 sgot->size += 4;
824
825 break;
826
827 case R_MN10300_PLT32:
828 case R_MN10300_PLT16:
829 /* This symbol requires a procedure linkage table entry. We
830 actually build the entry in adjust_dynamic_symbol,
831 because this might be a case of linking PIC code which is
832 never referenced by a dynamic object, in which case we
833 don't need to generate a procedure linkage table entry
834 after all. */
835
836 /* If this is a local symbol, we resolve it directly without
837 creating a procedure linkage table entry. */
838 if (h == NULL)
839 continue;
840
841 if (ELF_ST_VISIBILITY (h->other) == STV_INTERNAL
842 || ELF_ST_VISIBILITY (h->other) == STV_HIDDEN)
843 break;
844
845 h->needs_plt = 1;
846
847 break;
848
849 case R_MN10300_24:
850 case R_MN10300_16:
851 case R_MN10300_8:
852 case R_MN10300_PCREL32:
853 case R_MN10300_PCREL16:
854 case R_MN10300_PCREL8:
855 if (h != NULL)
856 h->non_got_ref = 1;
857 break;
858
859 case R_MN10300_32:
860 if (h != NULL)
861 h->non_got_ref = 1;
862
863 /* If we are creating a shared library, then we need to copy
864 the reloc into the shared library. */
865 if (info->shared
866 && (sec->flags & SEC_ALLOC) != 0)
867 {
868 /* When creating a shared object, we must copy these
869 reloc types into the output file. We create a reloc
870 section in dynobj and make room for this reloc. */
871 if (sreloc == NULL)
872 {
873 const char * name;
874
875 name = (bfd_elf_string_from_elf_section
876 (abfd,
877 elf_elfheader (abfd)->e_shstrndx,
878 elf_section_data (sec)->rel_hdr.sh_name));
879 if (name == NULL)
880 return FALSE;
881
882 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
883 && strcmp (bfd_get_section_name (abfd, sec),
884 name + 5) == 0);
885
886 sreloc = bfd_get_section_by_name (dynobj, name);
887 if (sreloc == NULL)
888 {
889 flagword flags;
890
891 flags = (SEC_HAS_CONTENTS | SEC_READONLY
892 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
893 if ((sec->flags & SEC_ALLOC) != 0)
894 flags |= SEC_ALLOC | SEC_LOAD;
895 sreloc = bfd_make_section_with_flags (dynobj,
896 name,
897 flags);
898 if (sreloc == NULL
899 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
900 return FALSE;
901 }
902 }
903
904 sreloc->size += sizeof (Elf32_External_Rela);
905 }
906
907 break;
908 }
909 }
910
911 return TRUE;
912 }
913
914 /* Return the section that should be marked against GC for a given
915 relocation. */
916
917 static asection *
918 mn10300_elf_gc_mark_hook (sec, info, rel, h, sym)
919 asection *sec;
920 struct bfd_link_info *info ATTRIBUTE_UNUSED;
921 Elf_Internal_Rela *rel;
922 struct elf_link_hash_entry *h;
923 Elf_Internal_Sym *sym;
924 {
925 if (h != NULL)
926 {
927 switch (ELF32_R_TYPE (rel->r_info))
928 {
929 case R_MN10300_GNU_VTINHERIT:
930 case R_MN10300_GNU_VTENTRY:
931 break;
932
933 default:
934 switch (h->root.type)
935 {
936 case bfd_link_hash_defined:
937 case bfd_link_hash_defweak:
938 return h->root.u.def.section;
939
940 case bfd_link_hash_common:
941 return h->root.u.c.p->section;
942
943 default:
944 break;
945 }
946 }
947 }
948 else
949 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
950
951 return NULL;
952 }
953
954 /* Perform a relocation as part of a final link. */
955 static bfd_reloc_status_type
956 mn10300_elf_final_link_relocate (howto, input_bfd, output_bfd,
957 input_section, contents, offset, value,
958 addend, h, symndx, info, sym_sec, is_local)
959 reloc_howto_type *howto;
960 bfd *input_bfd;
961 bfd *output_bfd ATTRIBUTE_UNUSED;
962 asection *input_section;
963 bfd_byte *contents;
964 bfd_vma offset;
965 bfd_vma value;
966 bfd_vma addend;
967 struct elf_link_hash_entry * h;
968 unsigned long symndx;
969 struct bfd_link_info *info;
970 asection *sym_sec ATTRIBUTE_UNUSED;
971 int is_local ATTRIBUTE_UNUSED;
972 {
973 unsigned long r_type = howto->type;
974 bfd_byte *hit_data = contents + offset;
975 bfd * dynobj;
976 bfd_vma * local_got_offsets;
977 asection * sgot;
978 asection * splt;
979 asection * sreloc;
980
981 dynobj = elf_hash_table (info)->dynobj;
982 local_got_offsets = elf_local_got_offsets (input_bfd);
983
984 sgot = NULL;
985 splt = NULL;
986 sreloc = NULL;
987
988 switch (r_type)
989 {
990 case R_MN10300_24:
991 case R_MN10300_16:
992 case R_MN10300_8:
993 case R_MN10300_PCREL8:
994 case R_MN10300_PCREL16:
995 case R_MN10300_PCREL32:
996 case R_MN10300_GOTOFF32:
997 case R_MN10300_GOTOFF24:
998 case R_MN10300_GOTOFF16:
999 if (info->shared
1000 && (input_section->flags & SEC_ALLOC) != 0
1001 && h != NULL
1002 && ! SYMBOL_REFERENCES_LOCAL (info, h))
1003 return bfd_reloc_dangerous;
1004 }
1005
1006 switch (r_type)
1007 {
1008 case R_MN10300_NONE:
1009 return bfd_reloc_ok;
1010
1011 case R_MN10300_32:
1012 if (info->shared
1013 && (input_section->flags & SEC_ALLOC) != 0)
1014 {
1015 Elf_Internal_Rela outrel;
1016 bfd_boolean skip, relocate;
1017
1018 /* When generating a shared object, these relocations are
1019 copied into the output file to be resolved at run
1020 time. */
1021 if (sreloc == NULL)
1022 {
1023 const char * name;
1024
1025 name = (bfd_elf_string_from_elf_section
1026 (input_bfd,
1027 elf_elfheader (input_bfd)->e_shstrndx,
1028 elf_section_data (input_section)->rel_hdr.sh_name));
1029 if (name == NULL)
1030 return FALSE;
1031
1032 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
1033 && strcmp (bfd_get_section_name (input_bfd,
1034 input_section),
1035 name + 5) == 0);
1036
1037 sreloc = bfd_get_section_by_name (dynobj, name);
1038 BFD_ASSERT (sreloc != NULL);
1039 }
1040
1041 skip = FALSE;
1042
1043 outrel.r_offset = _bfd_elf_section_offset (input_bfd, info,
1044 input_section, offset);
1045 if (outrel.r_offset == (bfd_vma) -1)
1046 skip = TRUE;
1047
1048 outrel.r_offset += (input_section->output_section->vma
1049 + input_section->output_offset);
1050
1051 if (skip)
1052 {
1053 memset (&outrel, 0, sizeof outrel);
1054 relocate = FALSE;
1055 }
1056 else
1057 {
1058 /* h->dynindx may be -1 if this symbol was marked to
1059 become local. */
1060 if (h == NULL
1061 || SYMBOL_REFERENCES_LOCAL (info, h))
1062 {
1063 relocate = TRUE;
1064 outrel.r_info = ELF32_R_INFO (0, R_MN10300_RELATIVE);
1065 outrel.r_addend = value + addend;
1066 }
1067 else
1068 {
1069 BFD_ASSERT (h->dynindx != -1);
1070 relocate = FALSE;
1071 outrel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_32);
1072 outrel.r_addend = value + addend;
1073 }
1074 }
1075
1076 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
1077 (bfd_byte *) (((Elf32_External_Rela *) sreloc->contents)
1078 + sreloc->reloc_count));
1079 ++sreloc->reloc_count;
1080
1081 /* If this reloc is against an external symbol, we do
1082 not want to fiddle with the addend. Otherwise, we
1083 need to include the symbol value so that it becomes
1084 an addend for the dynamic reloc. */
1085 if (! relocate)
1086 return bfd_reloc_ok;
1087 }
1088 value += addend;
1089 bfd_put_32 (input_bfd, value, hit_data);
1090 return bfd_reloc_ok;
1091
1092 case R_MN10300_24:
1093 value += addend;
1094
1095 if ((long) value > 0x7fffff || (long) value < -0x800000)
1096 return bfd_reloc_overflow;
1097
1098 bfd_put_8 (input_bfd, value & 0xff, hit_data);
1099 bfd_put_8 (input_bfd, (value >> 8) & 0xff, hit_data + 1);
1100 bfd_put_8 (input_bfd, (value >> 16) & 0xff, hit_data + 2);
1101 return bfd_reloc_ok;
1102
1103 case R_MN10300_16:
1104 value += addend;
1105
1106 if ((long) value > 0x7fff || (long) value < -0x8000)
1107 return bfd_reloc_overflow;
1108
1109 bfd_put_16 (input_bfd, value, hit_data);
1110 return bfd_reloc_ok;
1111
1112 case R_MN10300_8:
1113 value += addend;
1114
1115 if ((long) value > 0x7f || (long) value < -0x80)
1116 return bfd_reloc_overflow;
1117
1118 bfd_put_8 (input_bfd, value, hit_data);
1119 return bfd_reloc_ok;
1120
1121 case R_MN10300_PCREL8:
1122 value -= (input_section->output_section->vma
1123 + input_section->output_offset);
1124 value -= offset;
1125 value += addend;
1126
1127 if ((long) value > 0xff || (long) value < -0x100)
1128 return bfd_reloc_overflow;
1129
1130 bfd_put_8 (input_bfd, value, hit_data);
1131 return bfd_reloc_ok;
1132
1133 case R_MN10300_PCREL16:
1134 value -= (input_section->output_section->vma
1135 + input_section->output_offset);
1136 value -= offset;
1137 value += addend;
1138
1139 if ((long) value > 0xffff || (long) value < -0x10000)
1140 return bfd_reloc_overflow;
1141
1142 bfd_put_16 (input_bfd, value, hit_data);
1143 return bfd_reloc_ok;
1144
1145 case R_MN10300_PCREL32:
1146 value -= (input_section->output_section->vma
1147 + input_section->output_offset);
1148 value -= offset;
1149 value += addend;
1150
1151 bfd_put_32 (input_bfd, value, hit_data);
1152 return bfd_reloc_ok;
1153
1154 case R_MN10300_GNU_VTINHERIT:
1155 case R_MN10300_GNU_VTENTRY:
1156 return bfd_reloc_ok;
1157
1158 case R_MN10300_GOTPC32:
1159 /* Use global offset table as symbol value. */
1160
1161 value = bfd_get_section_by_name (dynobj,
1162 ".got")->output_section->vma;
1163 value -= (input_section->output_section->vma
1164 + input_section->output_offset);
1165 value -= offset;
1166 value += addend;
1167
1168 bfd_put_32 (input_bfd, value, hit_data);
1169 return bfd_reloc_ok;
1170
1171 case R_MN10300_GOTPC16:
1172 /* Use global offset table as symbol value. */
1173
1174 value = bfd_get_section_by_name (dynobj,
1175 ".got")->output_section->vma;
1176 value -= (input_section->output_section->vma
1177 + input_section->output_offset);
1178 value -= offset;
1179 value += addend;
1180
1181 if ((long) value > 0xffff || (long) value < -0x10000)
1182 return bfd_reloc_overflow;
1183
1184 bfd_put_16 (input_bfd, value, hit_data);
1185 return bfd_reloc_ok;
1186
1187 case R_MN10300_GOTOFF32:
1188 value -= bfd_get_section_by_name (dynobj,
1189 ".got")->output_section->vma;
1190 value += addend;
1191
1192 bfd_put_32 (input_bfd, value, hit_data);
1193 return bfd_reloc_ok;
1194
1195 case R_MN10300_GOTOFF24:
1196 value -= bfd_get_section_by_name (dynobj,
1197 ".got")->output_section->vma;
1198 value += addend;
1199
1200 if ((long) value > 0x7fffff || (long) value < -0x800000)
1201 return bfd_reloc_overflow;
1202
1203 bfd_put_8 (input_bfd, value, hit_data);
1204 bfd_put_8 (input_bfd, (value >> 8) & 0xff, hit_data + 1);
1205 bfd_put_8 (input_bfd, (value >> 16) & 0xff, hit_data + 2);
1206 return bfd_reloc_ok;
1207
1208 case R_MN10300_GOTOFF16:
1209 value -= bfd_get_section_by_name (dynobj,
1210 ".got")->output_section->vma;
1211 value += addend;
1212
1213 if ((long) value > 0xffff || (long) value < -0x10000)
1214 return bfd_reloc_overflow;
1215
1216 bfd_put_16 (input_bfd, value, hit_data);
1217 return bfd_reloc_ok;
1218
1219 case R_MN10300_PLT32:
1220 if (h != NULL
1221 && ELF_ST_VISIBILITY (h->other) != STV_INTERNAL
1222 && ELF_ST_VISIBILITY (h->other) != STV_HIDDEN
1223 && h->plt.offset != (bfd_vma) -1)
1224 {
1225 asection * splt;
1226
1227 splt = bfd_get_section_by_name (dynobj, ".plt");
1228
1229 value = (splt->output_section->vma
1230 + splt->output_offset
1231 + h->plt.offset) - value;
1232 }
1233
1234 value -= (input_section->output_section->vma
1235 + input_section->output_offset);
1236 value -= offset;
1237 value += addend;
1238
1239 bfd_put_32 (input_bfd, value, hit_data);
1240 return bfd_reloc_ok;
1241
1242 case R_MN10300_PLT16:
1243 if (h != NULL
1244 && ELF_ST_VISIBILITY (h->other) != STV_INTERNAL
1245 && ELF_ST_VISIBILITY (h->other) != STV_HIDDEN
1246 && h->plt.offset != (bfd_vma) -1)
1247 {
1248 asection * splt;
1249
1250 splt = bfd_get_section_by_name (dynobj, ".plt");
1251
1252 value = (splt->output_section->vma
1253 + splt->output_offset
1254 + h->plt.offset) - value;
1255 }
1256
1257 value -= (input_section->output_section->vma
1258 + input_section->output_offset);
1259 value -= offset;
1260 value += addend;
1261
1262 if ((long) value > 0xffff || (long) value < -0x10000)
1263 return bfd_reloc_overflow;
1264
1265 bfd_put_16 (input_bfd, value, hit_data);
1266 return bfd_reloc_ok;
1267
1268 case R_MN10300_GOT32:
1269 case R_MN10300_GOT24:
1270 case R_MN10300_GOT16:
1271 {
1272 asection * sgot;
1273
1274 sgot = bfd_get_section_by_name (dynobj, ".got");
1275
1276 if (h != NULL)
1277 {
1278 bfd_vma off;
1279
1280 off = h->got.offset;
1281 BFD_ASSERT (off != (bfd_vma) -1);
1282
1283 if (! elf_hash_table (info)->dynamic_sections_created
1284 || SYMBOL_REFERENCES_LOCAL (info, h))
1285 /* This is actually a static link, or it is a
1286 -Bsymbolic link and the symbol is defined
1287 locally, or the symbol was forced to be local
1288 because of a version file. We must initialize
1289 this entry in the global offset table.
1290
1291 When doing a dynamic link, we create a .rela.got
1292 relocation entry to initialize the value. This
1293 is done in the finish_dynamic_symbol routine. */
1294 bfd_put_32 (output_bfd, value,
1295 sgot->contents + off);
1296
1297 value = sgot->output_offset + off;
1298 }
1299 else
1300 {
1301 bfd_vma off;
1302
1303 off = elf_local_got_offsets (input_bfd)[symndx];
1304
1305 bfd_put_32 (output_bfd, value, sgot->contents + off);
1306
1307 if (info->shared)
1308 {
1309 asection * srelgot;
1310 Elf_Internal_Rela outrel;
1311
1312 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1313 BFD_ASSERT (srelgot != NULL);
1314
1315 outrel.r_offset = (sgot->output_section->vma
1316 + sgot->output_offset
1317 + off);
1318 outrel.r_info = ELF32_R_INFO (0, R_MN10300_RELATIVE);
1319 outrel.r_addend = value;
1320 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
1321 (bfd_byte *) (((Elf32_External_Rela *)
1322 srelgot->contents)
1323 + srelgot->reloc_count));
1324 ++ srelgot->reloc_count;
1325 }
1326
1327 value = sgot->output_offset + off;
1328 }
1329 }
1330
1331 value += addend;
1332
1333 if (r_type == R_MN10300_GOT32)
1334 {
1335 bfd_put_32 (input_bfd, value, hit_data);
1336 return bfd_reloc_ok;
1337 }
1338 else if (r_type == R_MN10300_GOT24)
1339 {
1340 if ((long) value > 0x7fffff || (long) value < -0x800000)
1341 return bfd_reloc_overflow;
1342
1343 bfd_put_8 (input_bfd, value & 0xff, hit_data);
1344 bfd_put_8 (input_bfd, (value >> 8) & 0xff, hit_data + 1);
1345 bfd_put_8 (input_bfd, (value >> 16) & 0xff, hit_data + 2);
1346 return bfd_reloc_ok;
1347 }
1348 else if (r_type == R_MN10300_GOT16)
1349 {
1350 if ((long) value > 0xffff || (long) value < -0x10000)
1351 return bfd_reloc_overflow;
1352
1353 bfd_put_16 (input_bfd, value, hit_data);
1354 return bfd_reloc_ok;
1355 }
1356 /* Fall through. */
1357
1358 default:
1359 return bfd_reloc_notsupported;
1360 }
1361 }
1362 \f
1363 /* Relocate an MN10300 ELF section. */
1364 static bfd_boolean
1365 mn10300_elf_relocate_section (output_bfd, info, input_bfd, input_section,
1366 contents, relocs, local_syms, local_sections)
1367 bfd *output_bfd;
1368 struct bfd_link_info *info;
1369 bfd *input_bfd;
1370 asection *input_section;
1371 bfd_byte *contents;
1372 Elf_Internal_Rela *relocs;
1373 Elf_Internal_Sym *local_syms;
1374 asection **local_sections;
1375 {
1376 Elf_Internal_Shdr *symtab_hdr;
1377 struct elf_link_hash_entry **sym_hashes;
1378 Elf_Internal_Rela *rel, *relend;
1379
1380 if (info->relocatable)
1381 return TRUE;
1382
1383 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1384 sym_hashes = elf_sym_hashes (input_bfd);
1385
1386 rel = relocs;
1387 relend = relocs + input_section->reloc_count;
1388 for (; rel < relend; rel++)
1389 {
1390 int r_type;
1391 reloc_howto_type *howto;
1392 unsigned long r_symndx;
1393 Elf_Internal_Sym *sym;
1394 asection *sec;
1395 struct elf32_mn10300_link_hash_entry *h;
1396 bfd_vma relocation;
1397 bfd_reloc_status_type r;
1398
1399 r_symndx = ELF32_R_SYM (rel->r_info);
1400 r_type = ELF32_R_TYPE (rel->r_info);
1401 howto = elf_mn10300_howto_table + r_type;
1402
1403 /* Just skip the vtable gc relocs. */
1404 if (r_type == R_MN10300_GNU_VTINHERIT
1405 || r_type == R_MN10300_GNU_VTENTRY)
1406 continue;
1407
1408 h = NULL;
1409 sym = NULL;
1410 sec = NULL;
1411 if (r_symndx < symtab_hdr->sh_info)
1412 {
1413 sym = local_syms + r_symndx;
1414 sec = local_sections[r_symndx];
1415 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1416 }
1417 else
1418 {
1419 bfd_boolean unresolved_reloc;
1420 bfd_boolean warned;
1421 struct elf_link_hash_entry *hh;
1422
1423 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1424 r_symndx, symtab_hdr, sym_hashes,
1425 hh, sec, relocation,
1426 unresolved_reloc, warned);
1427
1428 h = (struct elf32_mn10300_link_hash_entry *) hh;
1429
1430 if ((h->root.root.type == bfd_link_hash_defined
1431 || h->root.root.type == bfd_link_hash_defweak)
1432 && ( r_type == R_MN10300_GOTPC32
1433 || r_type == R_MN10300_GOTPC16
1434 || (( r_type == R_MN10300_PLT32
1435 || r_type == R_MN10300_PLT16)
1436 && ELF_ST_VISIBILITY (h->root.other) != STV_INTERNAL
1437 && ELF_ST_VISIBILITY (h->root.other) != STV_HIDDEN
1438 && h->root.plt.offset != (bfd_vma) -1)
1439 || (( r_type == R_MN10300_GOT32
1440 || r_type == R_MN10300_GOT24
1441 || r_type == R_MN10300_GOT16)
1442 && elf_hash_table (info)->dynamic_sections_created
1443 && !SYMBOL_REFERENCES_LOCAL (info, hh))
1444 || (r_type == R_MN10300_32
1445 && !SYMBOL_REFERENCES_LOCAL (info, hh)
1446 && ((input_section->flags & SEC_ALLOC) != 0
1447 /* DWARF will emit R_MN10300_32 relocations
1448 in its sections against symbols defined
1449 externally in shared libraries. We can't
1450 do anything with them here. */
1451 || ((input_section->flags & SEC_DEBUGGING) != 0
1452 && h->root.def_dynamic)))))
1453 /* In these cases, we don't need the relocation
1454 value. We check specially because in some
1455 obscure cases sec->output_section will be NULL. */
1456 relocation = 0;
1457
1458 else if (unresolved_reloc)
1459 (*_bfd_error_handler)
1460 (_("%s: warning: unresolvable relocation against symbol `%s' from %s section"),
1461 bfd_get_filename (input_bfd), h->root.root.root.string,
1462 bfd_get_section_name (input_bfd, input_section));
1463 }
1464
1465 r = mn10300_elf_final_link_relocate (howto, input_bfd, output_bfd,
1466 input_section,
1467 contents, rel->r_offset,
1468 relocation, rel->r_addend,
1469 (struct elf_link_hash_entry *)h,
1470 r_symndx,
1471 info, sec, h == NULL);
1472
1473 if (r != bfd_reloc_ok)
1474 {
1475 const char *name;
1476 const char *msg = (const char *) 0;
1477
1478 if (h != NULL)
1479 name = h->root.root.root.string;
1480 else
1481 {
1482 name = (bfd_elf_string_from_elf_section
1483 (input_bfd, symtab_hdr->sh_link, sym->st_name));
1484 if (name == NULL || *name == '\0')
1485 name = bfd_section_name (input_bfd, sec);
1486 }
1487
1488 switch (r)
1489 {
1490 case bfd_reloc_overflow:
1491 if (! ((*info->callbacks->reloc_overflow)
1492 (info, (h ? &h->root.root : NULL), name,
1493 howto->name, (bfd_vma) 0, input_bfd,
1494 input_section, rel->r_offset)))
1495 return FALSE;
1496 break;
1497
1498 case bfd_reloc_undefined:
1499 if (! ((*info->callbacks->undefined_symbol)
1500 (info, name, input_bfd, input_section,
1501 rel->r_offset, TRUE)))
1502 return FALSE;
1503 break;
1504
1505 case bfd_reloc_outofrange:
1506 msg = _("internal error: out of range error");
1507 goto common_error;
1508
1509 case bfd_reloc_notsupported:
1510 msg = _("internal error: unsupported relocation error");
1511 goto common_error;
1512
1513 case bfd_reloc_dangerous:
1514 msg = _("internal error: dangerous error");
1515 goto common_error;
1516
1517 default:
1518 msg = _("internal error: unknown error");
1519 /* fall through */
1520
1521 common_error:
1522 if (!((*info->callbacks->warning)
1523 (info, msg, name, input_bfd, input_section,
1524 rel->r_offset)))
1525 return FALSE;
1526 break;
1527 }
1528 }
1529 }
1530
1531 return TRUE;
1532 }
1533
1534 /* Finish initializing one hash table entry. */
1535 static bfd_boolean
1536 elf32_mn10300_finish_hash_table_entry (gen_entry, in_args)
1537 struct bfd_hash_entry *gen_entry;
1538 PTR in_args;
1539 {
1540 struct elf32_mn10300_link_hash_entry *entry;
1541 struct bfd_link_info *link_info = (struct bfd_link_info *)in_args;
1542 unsigned int byte_count = 0;
1543
1544 entry = (struct elf32_mn10300_link_hash_entry *) gen_entry;
1545
1546 if (entry->root.root.type == bfd_link_hash_warning)
1547 entry = (struct elf32_mn10300_link_hash_entry *) entry->root.root.u.i.link;
1548
1549 /* If we already know we want to convert "call" to "calls" for calls
1550 to this symbol, then return now. */
1551 if (entry->flags == MN10300_CONVERT_CALL_TO_CALLS)
1552 return TRUE;
1553
1554 /* If there are no named calls to this symbol, or there's nothing we
1555 can move from the function itself into the "call" instruction,
1556 then note that all "call" instructions should be converted into
1557 "calls" instructions and return. If a symbol is available for
1558 dynamic symbol resolution (overridable or overriding), avoid
1559 custom calling conventions. */
1560 if (entry->direct_calls == 0
1561 || (entry->stack_size == 0 && entry->movm_args == 0)
1562 || (elf_hash_table (link_info)->dynamic_sections_created
1563 && ELF_ST_VISIBILITY (entry->root.other) != STV_INTERNAL
1564 && ELF_ST_VISIBILITY (entry->root.other) != STV_HIDDEN))
1565 {
1566 /* Make a note that we should convert "call" instructions to "calls"
1567 instructions for calls to this symbol. */
1568 entry->flags |= MN10300_CONVERT_CALL_TO_CALLS;
1569 return TRUE;
1570 }
1571
1572 /* We may be able to move some instructions from the function itself into
1573 the "call" instruction. Count how many bytes we might be able to
1574 eliminate in the function itself. */
1575
1576 /* A movm instruction is two bytes. */
1577 if (entry->movm_args)
1578 byte_count += 2;
1579
1580 /* Count the insn to allocate stack space too. */
1581 if (entry->stack_size > 0)
1582 {
1583 if (entry->stack_size <= 128)
1584 byte_count += 3;
1585 else
1586 byte_count += 4;
1587 }
1588
1589 /* If using "call" will result in larger code, then turn all
1590 the associated "call" instructions into "calls" instructions. */
1591 if (byte_count < entry->direct_calls)
1592 entry->flags |= MN10300_CONVERT_CALL_TO_CALLS;
1593
1594 /* This routine never fails. */
1595 return TRUE;
1596 }
1597
1598 /* This function handles relaxing for the mn10300.
1599
1600 There are quite a few relaxing opportunities available on the mn10300:
1601
1602 * calls:32 -> calls:16 2 bytes
1603 * call:32 -> call:16 2 bytes
1604
1605 * call:32 -> calls:32 1 byte
1606 * call:16 -> calls:16 1 byte
1607 * These are done anytime using "calls" would result
1608 in smaller code, or when necessary to preserve the
1609 meaning of the program.
1610
1611 * call:32 varies
1612 * call:16
1613 * In some circumstances we can move instructions
1614 from a function prologue into a "call" instruction.
1615 This is only done if the resulting code is no larger
1616 than the original code.
1617
1618 * jmp:32 -> jmp:16 2 bytes
1619 * jmp:16 -> bra:8 1 byte
1620
1621 * If the previous instruction is a conditional branch
1622 around the jump/bra, we may be able to reverse its condition
1623 and change its target to the jump's target. The jump/bra
1624 can then be deleted. 2 bytes
1625
1626 * mov abs32 -> mov abs16 1 or 2 bytes
1627
1628 * Most instructions which accept imm32 can relax to imm16 1 or 2 bytes
1629 - Most instructions which accept imm16 can relax to imm8 1 or 2 bytes
1630
1631 * Most instructions which accept d32 can relax to d16 1 or 2 bytes
1632 - Most instructions which accept d16 can relax to d8 1 or 2 bytes
1633
1634 We don't handle imm16->imm8 or d16->d8 as they're very rare
1635 and somewhat more difficult to support. */
1636
1637 static bfd_boolean
1638 mn10300_elf_relax_section (abfd, sec, link_info, again)
1639 bfd *abfd;
1640 asection *sec;
1641 struct bfd_link_info *link_info;
1642 bfd_boolean *again;
1643 {
1644 Elf_Internal_Shdr *symtab_hdr;
1645 Elf_Internal_Rela *internal_relocs = NULL;
1646 Elf_Internal_Rela *irel, *irelend;
1647 bfd_byte *contents = NULL;
1648 Elf_Internal_Sym *isymbuf = NULL;
1649 struct elf32_mn10300_link_hash_table *hash_table;
1650 asection *section = sec;
1651
1652 /* Assume nothing changes. */
1653 *again = FALSE;
1654
1655 /* We need a pointer to the mn10300 specific hash table. */
1656 hash_table = elf32_mn10300_hash_table (link_info);
1657
1658 /* Initialize fields in each hash table entry the first time through. */
1659 if ((hash_table->flags & MN10300_HASH_ENTRIES_INITIALIZED) == 0)
1660 {
1661 bfd *input_bfd;
1662
1663 /* Iterate over all the input bfds. */
1664 for (input_bfd = link_info->input_bfds;
1665 input_bfd != NULL;
1666 input_bfd = input_bfd->link_next)
1667 {
1668 /* We're going to need all the symbols for each bfd. */
1669 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1670 if (symtab_hdr->sh_info != 0)
1671 {
1672 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1673 if (isymbuf == NULL)
1674 isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
1675 symtab_hdr->sh_info, 0,
1676 NULL, NULL, NULL);
1677 if (isymbuf == NULL)
1678 goto error_return;
1679 }
1680
1681 /* Iterate over each section in this bfd. */
1682 for (section = input_bfd->sections;
1683 section != NULL;
1684 section = section->next)
1685 {
1686 struct elf32_mn10300_link_hash_entry *hash;
1687 Elf_Internal_Sym *sym;
1688 asection *sym_sec = NULL;
1689 const char *sym_name;
1690 char *new_name;
1691
1692 /* If there's nothing to do in this section, skip it. */
1693 if (! (((section->flags & SEC_RELOC) != 0
1694 && section->reloc_count != 0)
1695 || (section->flags & SEC_CODE) != 0))
1696 continue;
1697
1698 /* Get cached copy of section contents if it exists. */
1699 if (elf_section_data (section)->this_hdr.contents != NULL)
1700 contents = elf_section_data (section)->this_hdr.contents;
1701 else if (section->size != 0)
1702 {
1703 /* Go get them off disk. */
1704 if (!bfd_malloc_and_get_section (input_bfd, section,
1705 &contents))
1706 goto error_return;
1707 }
1708 else
1709 contents = NULL;
1710
1711 /* If there aren't any relocs, then there's nothing to do. */
1712 if ((section->flags & SEC_RELOC) != 0
1713 && section->reloc_count != 0)
1714 {
1715
1716 /* Get a copy of the native relocations. */
1717 internal_relocs = (_bfd_elf_link_read_relocs
1718 (input_bfd, section, (PTR) NULL,
1719 (Elf_Internal_Rela *) NULL,
1720 link_info->keep_memory));
1721 if (internal_relocs == NULL)
1722 goto error_return;
1723
1724 /* Now examine each relocation. */
1725 irel = internal_relocs;
1726 irelend = irel + section->reloc_count;
1727 for (; irel < irelend; irel++)
1728 {
1729 long r_type;
1730 unsigned long r_index;
1731 unsigned char code;
1732
1733 r_type = ELF32_R_TYPE (irel->r_info);
1734 r_index = ELF32_R_SYM (irel->r_info);
1735
1736 if (r_type < 0 || r_type >= (int) R_MN10300_MAX)
1737 goto error_return;
1738
1739 /* We need the name and hash table entry of the target
1740 symbol! */
1741 hash = NULL;
1742 sym = NULL;
1743 sym_sec = NULL;
1744
1745 if (r_index < symtab_hdr->sh_info)
1746 {
1747 /* A local symbol. */
1748 Elf_Internal_Sym *isym;
1749 struct elf_link_hash_table *elftab;
1750 bfd_size_type amt;
1751
1752 isym = isymbuf + r_index;
1753 if (isym->st_shndx == SHN_UNDEF)
1754 sym_sec = bfd_und_section_ptr;
1755 else if (isym->st_shndx == SHN_ABS)
1756 sym_sec = bfd_abs_section_ptr;
1757 else if (isym->st_shndx == SHN_COMMON)
1758 sym_sec = bfd_com_section_ptr;
1759 else
1760 sym_sec
1761 = bfd_section_from_elf_index (input_bfd,
1762 isym->st_shndx);
1763
1764 sym_name
1765 = bfd_elf_string_from_elf_section (input_bfd,
1766 (symtab_hdr
1767 ->sh_link),
1768 isym->st_name);
1769
1770 /* If it isn't a function, then we don't care
1771 about it. */
1772 if (ELF_ST_TYPE (isym->st_info) != STT_FUNC)
1773 continue;
1774
1775 /* Tack on an ID so we can uniquely identify this
1776 local symbol in the global hash table. */
1777 amt = strlen (sym_name) + 10;
1778 new_name = bfd_malloc (amt);
1779 if (new_name == 0)
1780 goto error_return;
1781
1782 sprintf (new_name, "%s_%08x", sym_name, sym_sec->id);
1783 sym_name = new_name;
1784
1785 elftab = &hash_table->static_hash_table->root;
1786 hash = ((struct elf32_mn10300_link_hash_entry *)
1787 elf_link_hash_lookup (elftab, sym_name,
1788 TRUE, TRUE, FALSE));
1789 free (new_name);
1790 }
1791 else
1792 {
1793 r_index -= symtab_hdr->sh_info;
1794 hash = (struct elf32_mn10300_link_hash_entry *)
1795 elf_sym_hashes (input_bfd)[r_index];
1796 }
1797
1798 /* If this is not a "call" instruction, then we
1799 should convert "call" instructions to "calls"
1800 instructions. */
1801 code = bfd_get_8 (input_bfd,
1802 contents + irel->r_offset - 1);
1803 if (code != 0xdd && code != 0xcd)
1804 hash->flags |= MN10300_CONVERT_CALL_TO_CALLS;
1805
1806 /* If this is a jump/call, then bump the
1807 direct_calls counter. Else force "call" to
1808 "calls" conversions. */
1809 if (r_type == R_MN10300_PCREL32
1810 || r_type == R_MN10300_PLT32
1811 || r_type == R_MN10300_PLT16
1812 || r_type == R_MN10300_PCREL16)
1813 hash->direct_calls++;
1814 else
1815 hash->flags |= MN10300_CONVERT_CALL_TO_CALLS;
1816 }
1817 }
1818
1819 /* Now look at the actual contents to get the stack size,
1820 and a list of what registers were saved in the prologue
1821 (ie movm_args). */
1822 if ((section->flags & SEC_CODE) != 0)
1823 {
1824 Elf_Internal_Sym *isym, *isymend;
1825 unsigned int sec_shndx;
1826 struct elf_link_hash_entry **hashes;
1827 struct elf_link_hash_entry **end_hashes;
1828 unsigned int symcount;
1829
1830 sec_shndx = _bfd_elf_section_from_bfd_section (input_bfd,
1831 section);
1832
1833 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
1834 - symtab_hdr->sh_info);
1835 hashes = elf_sym_hashes (input_bfd);
1836 end_hashes = hashes + symcount;
1837
1838 /* Look at each function defined in this section and
1839 update info for that function. */
1840 isymend = isymbuf + symtab_hdr->sh_info;
1841 for (isym = isymbuf; isym < isymend; isym++)
1842 {
1843 if (isym->st_shndx == sec_shndx
1844 && ELF_ST_TYPE (isym->st_info) == STT_FUNC)
1845 {
1846 struct elf_link_hash_table *elftab;
1847 bfd_size_type amt;
1848 struct elf_link_hash_entry **lhashes = hashes;
1849
1850 /* Skip a local symbol if it aliases a
1851 global one. */
1852 for (; lhashes < end_hashes; lhashes++)
1853 {
1854 hash = (struct elf32_mn10300_link_hash_entry *) *lhashes;
1855 if ((hash->root.root.type == bfd_link_hash_defined
1856 || hash->root.root.type == bfd_link_hash_defweak)
1857 && hash->root.root.u.def.section == section
1858 && hash->root.type == STT_FUNC
1859 && hash->root.root.u.def.value == isym->st_value)
1860 break;
1861 }
1862 if (lhashes != end_hashes)
1863 continue;
1864
1865 if (isym->st_shndx == SHN_UNDEF)
1866 sym_sec = bfd_und_section_ptr;
1867 else if (isym->st_shndx == SHN_ABS)
1868 sym_sec = bfd_abs_section_ptr;
1869 else if (isym->st_shndx == SHN_COMMON)
1870 sym_sec = bfd_com_section_ptr;
1871 else
1872 sym_sec
1873 = bfd_section_from_elf_index (input_bfd,
1874 isym->st_shndx);
1875
1876 sym_name = (bfd_elf_string_from_elf_section
1877 (input_bfd, symtab_hdr->sh_link,
1878 isym->st_name));
1879
1880 /* Tack on an ID so we can uniquely identify this
1881 local symbol in the global hash table. */
1882 amt = strlen (sym_name) + 10;
1883 new_name = bfd_malloc (amt);
1884 if (new_name == 0)
1885 goto error_return;
1886
1887 sprintf (new_name, "%s_%08x", sym_name, sym_sec->id);
1888 sym_name = new_name;
1889
1890 elftab = &hash_table->static_hash_table->root;
1891 hash = ((struct elf32_mn10300_link_hash_entry *)
1892 elf_link_hash_lookup (elftab, sym_name,
1893 TRUE, TRUE, FALSE));
1894 free (new_name);
1895 compute_function_info (input_bfd, hash,
1896 isym->st_value, contents);
1897 }
1898 }
1899
1900 for (; hashes < end_hashes; hashes++)
1901 {
1902 hash = (struct elf32_mn10300_link_hash_entry *) *hashes;
1903 if ((hash->root.root.type == bfd_link_hash_defined
1904 || hash->root.root.type == bfd_link_hash_defweak)
1905 && hash->root.root.u.def.section == section
1906 && hash->root.type == STT_FUNC)
1907 compute_function_info (input_bfd, hash,
1908 (hash)->root.root.u.def.value,
1909 contents);
1910 }
1911 }
1912
1913 /* Cache or free any memory we allocated for the relocs. */
1914 if (internal_relocs != NULL
1915 && elf_section_data (section)->relocs != internal_relocs)
1916 free (internal_relocs);
1917 internal_relocs = NULL;
1918
1919 /* Cache or free any memory we allocated for the contents. */
1920 if (contents != NULL
1921 && elf_section_data (section)->this_hdr.contents != contents)
1922 {
1923 if (! link_info->keep_memory)
1924 free (contents);
1925 else
1926 {
1927 /* Cache the section contents for elf_link_input_bfd. */
1928 elf_section_data (section)->this_hdr.contents = contents;
1929 }
1930 }
1931 contents = NULL;
1932 }
1933
1934 /* Cache or free any memory we allocated for the symbols. */
1935 if (isymbuf != NULL
1936 && symtab_hdr->contents != (unsigned char *) isymbuf)
1937 {
1938 if (! link_info->keep_memory)
1939 free (isymbuf);
1940 else
1941 {
1942 /* Cache the symbols for elf_link_input_bfd. */
1943 symtab_hdr->contents = (unsigned char *) isymbuf;
1944 }
1945 }
1946 isymbuf = NULL;
1947 }
1948
1949 /* Now iterate on each symbol in the hash table and perform
1950 the final initialization steps on each. */
1951 elf32_mn10300_link_hash_traverse (hash_table,
1952 elf32_mn10300_finish_hash_table_entry,
1953 link_info);
1954 elf32_mn10300_link_hash_traverse (hash_table->static_hash_table,
1955 elf32_mn10300_finish_hash_table_entry,
1956 link_info);
1957
1958 /* All entries in the hash table are fully initialized. */
1959 hash_table->flags |= MN10300_HASH_ENTRIES_INITIALIZED;
1960
1961 /* Now that everything has been initialized, go through each
1962 code section and delete any prologue insns which will be
1963 redundant because their operations will be performed by
1964 a "call" instruction. */
1965 for (input_bfd = link_info->input_bfds;
1966 input_bfd != NULL;
1967 input_bfd = input_bfd->link_next)
1968 {
1969 /* We're going to need all the local symbols for each bfd. */
1970 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1971 if (symtab_hdr->sh_info != 0)
1972 {
1973 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1974 if (isymbuf == NULL)
1975 isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
1976 symtab_hdr->sh_info, 0,
1977 NULL, NULL, NULL);
1978 if (isymbuf == NULL)
1979 goto error_return;
1980 }
1981
1982 /* Walk over each section in this bfd. */
1983 for (section = input_bfd->sections;
1984 section != NULL;
1985 section = section->next)
1986 {
1987 unsigned int sec_shndx;
1988 Elf_Internal_Sym *isym, *isymend;
1989 struct elf_link_hash_entry **hashes;
1990 struct elf_link_hash_entry **end_hashes;
1991 unsigned int symcount;
1992
1993 /* Skip non-code sections and empty sections. */
1994 if ((section->flags & SEC_CODE) == 0 || section->size == 0)
1995 continue;
1996
1997 if (section->reloc_count != 0)
1998 {
1999 /* Get a copy of the native relocations. */
2000 internal_relocs = (_bfd_elf_link_read_relocs
2001 (input_bfd, section, (PTR) NULL,
2002 (Elf_Internal_Rela *) NULL,
2003 link_info->keep_memory));
2004 if (internal_relocs == NULL)
2005 goto error_return;
2006 }
2007
2008 /* Get cached copy of section contents if it exists. */
2009 if (elf_section_data (section)->this_hdr.contents != NULL)
2010 contents = elf_section_data (section)->this_hdr.contents;
2011 else
2012 {
2013 /* Go get them off disk. */
2014 if (!bfd_malloc_and_get_section (input_bfd, section,
2015 &contents))
2016 goto error_return;
2017 }
2018
2019 sec_shndx = _bfd_elf_section_from_bfd_section (input_bfd,
2020 section);
2021
2022 /* Now look for any function in this section which needs
2023 insns deleted from its prologue. */
2024 isymend = isymbuf + symtab_hdr->sh_info;
2025 for (isym = isymbuf; isym < isymend; isym++)
2026 {
2027 struct elf32_mn10300_link_hash_entry *sym_hash;
2028 asection *sym_sec = NULL;
2029 const char *sym_name;
2030 char *new_name;
2031 struct elf_link_hash_table *elftab;
2032 bfd_size_type amt;
2033
2034 if (isym->st_shndx != sec_shndx)
2035 continue;
2036
2037 if (isym->st_shndx == SHN_UNDEF)
2038 sym_sec = bfd_und_section_ptr;
2039 else if (isym->st_shndx == SHN_ABS)
2040 sym_sec = bfd_abs_section_ptr;
2041 else if (isym->st_shndx == SHN_COMMON)
2042 sym_sec = bfd_com_section_ptr;
2043 else
2044 sym_sec
2045 = bfd_section_from_elf_index (input_bfd, isym->st_shndx);
2046
2047 sym_name
2048 = bfd_elf_string_from_elf_section (input_bfd,
2049 symtab_hdr->sh_link,
2050 isym->st_name);
2051
2052 /* Tack on an ID so we can uniquely identify this
2053 local symbol in the global hash table. */
2054 amt = strlen (sym_name) + 10;
2055 new_name = bfd_malloc (amt);
2056 if (new_name == 0)
2057 goto error_return;
2058 sprintf (new_name, "%s_%08x", sym_name, sym_sec->id);
2059 sym_name = new_name;
2060
2061 elftab = &hash_table->static_hash_table->root;
2062 sym_hash = ((struct elf32_mn10300_link_hash_entry *)
2063 elf_link_hash_lookup (elftab, sym_name,
2064 FALSE, FALSE, FALSE));
2065
2066 free (new_name);
2067 if (sym_hash == NULL)
2068 continue;
2069
2070 if (! (sym_hash->flags & MN10300_CONVERT_CALL_TO_CALLS)
2071 && ! (sym_hash->flags & MN10300_DELETED_PROLOGUE_BYTES))
2072 {
2073 int bytes = 0;
2074
2075 /* Note that we've changed things. */
2076 elf_section_data (section)->relocs = internal_relocs;
2077 elf_section_data (section)->this_hdr.contents = contents;
2078 symtab_hdr->contents = (unsigned char *) isymbuf;
2079
2080 /* Count how many bytes we're going to delete. */
2081 if (sym_hash->movm_args)
2082 bytes += 2;
2083
2084 if (sym_hash->stack_size > 0)
2085 {
2086 if (sym_hash->stack_size <= 128)
2087 bytes += 3;
2088 else
2089 bytes += 4;
2090 }
2091
2092 /* Note that we've deleted prologue bytes for this
2093 function. */
2094 sym_hash->flags |= MN10300_DELETED_PROLOGUE_BYTES;
2095
2096 /* Actually delete the bytes. */
2097 if (!mn10300_elf_relax_delete_bytes (input_bfd,
2098 section,
2099 isym->st_value,
2100 bytes))
2101 goto error_return;
2102
2103 /* Something changed. Not strictly necessary, but
2104 may lead to more relaxing opportunities. */
2105 *again = TRUE;
2106 }
2107 }
2108
2109 /* Look for any global functions in this section which
2110 need insns deleted from their prologues. */
2111 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
2112 - symtab_hdr->sh_info);
2113 hashes = elf_sym_hashes (input_bfd);
2114 end_hashes = hashes + symcount;
2115 for (; hashes < end_hashes; hashes++)
2116 {
2117 struct elf32_mn10300_link_hash_entry *sym_hash;
2118
2119 sym_hash = (struct elf32_mn10300_link_hash_entry *) *hashes;
2120 if ((sym_hash->root.root.type == bfd_link_hash_defined
2121 || sym_hash->root.root.type == bfd_link_hash_defweak)
2122 && sym_hash->root.root.u.def.section == section
2123 && ! (sym_hash->flags & MN10300_CONVERT_CALL_TO_CALLS)
2124 && ! (sym_hash->flags & MN10300_DELETED_PROLOGUE_BYTES))
2125 {
2126 int bytes = 0;
2127 bfd_vma symval;
2128
2129 /* Note that we've changed things. */
2130 elf_section_data (section)->relocs = internal_relocs;
2131 elf_section_data (section)->this_hdr.contents = contents;
2132 symtab_hdr->contents = (unsigned char *) isymbuf;
2133
2134 /* Count how many bytes we're going to delete. */
2135 if (sym_hash->movm_args)
2136 bytes += 2;
2137
2138 if (sym_hash->stack_size > 0)
2139 {
2140 if (sym_hash->stack_size <= 128)
2141 bytes += 3;
2142 else
2143 bytes += 4;
2144 }
2145
2146 /* Note that we've deleted prologue bytes for this
2147 function. */
2148 sym_hash->flags |= MN10300_DELETED_PROLOGUE_BYTES;
2149
2150 /* Actually delete the bytes. */
2151 symval = sym_hash->root.root.u.def.value;
2152 if (!mn10300_elf_relax_delete_bytes (input_bfd,
2153 section,
2154 symval,
2155 bytes))
2156 goto error_return;
2157
2158 /* Something changed. Not strictly necessary, but
2159 may lead to more relaxing opportunities. */
2160 *again = TRUE;
2161 }
2162 }
2163
2164 /* Cache or free any memory we allocated for the relocs. */
2165 if (internal_relocs != NULL
2166 && elf_section_data (section)->relocs != internal_relocs)
2167 free (internal_relocs);
2168 internal_relocs = NULL;
2169
2170 /* Cache or free any memory we allocated for the contents. */
2171 if (contents != NULL
2172 && elf_section_data (section)->this_hdr.contents != contents)
2173 {
2174 if (! link_info->keep_memory)
2175 free (contents);
2176 else
2177 {
2178 /* Cache the section contents for elf_link_input_bfd. */
2179 elf_section_data (section)->this_hdr.contents = contents;
2180 }
2181 }
2182 contents = NULL;
2183 }
2184
2185 /* Cache or free any memory we allocated for the symbols. */
2186 if (isymbuf != NULL
2187 && symtab_hdr->contents != (unsigned char *) isymbuf)
2188 {
2189 if (! link_info->keep_memory)
2190 free (isymbuf);
2191 else
2192 {
2193 /* Cache the symbols for elf_link_input_bfd. */
2194 symtab_hdr->contents = (unsigned char *) isymbuf;
2195 }
2196 }
2197 isymbuf = NULL;
2198 }
2199 }
2200
2201 /* (Re)initialize for the basic instruction shortening/relaxing pass. */
2202 contents = NULL;
2203 internal_relocs = NULL;
2204 isymbuf = NULL;
2205 /* For error_return. */
2206 section = sec;
2207
2208 /* We don't have to do anything for a relocatable link, if
2209 this section does not have relocs, or if this is not a
2210 code section. */
2211 if (link_info->relocatable
2212 || (sec->flags & SEC_RELOC) == 0
2213 || sec->reloc_count == 0
2214 || (sec->flags & SEC_CODE) == 0)
2215 return TRUE;
2216
2217 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2218
2219 /* Get a copy of the native relocations. */
2220 internal_relocs = (_bfd_elf_link_read_relocs
2221 (abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
2222 link_info->keep_memory));
2223 if (internal_relocs == NULL)
2224 goto error_return;
2225
2226 /* Walk through them looking for relaxing opportunities. */
2227 irelend = internal_relocs + sec->reloc_count;
2228 for (irel = internal_relocs; irel < irelend; irel++)
2229 {
2230 bfd_vma symval;
2231 struct elf32_mn10300_link_hash_entry *h = NULL;
2232
2233 /* If this isn't something that can be relaxed, then ignore
2234 this reloc. */
2235 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_NONE
2236 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_8
2237 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_MAX)
2238 continue;
2239
2240 /* Get the section contents if we haven't done so already. */
2241 if (contents == NULL)
2242 {
2243 /* Get cached copy if it exists. */
2244 if (elf_section_data (sec)->this_hdr.contents != NULL)
2245 contents = elf_section_data (sec)->this_hdr.contents;
2246 else
2247 {
2248 /* Go get them off disk. */
2249 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
2250 goto error_return;
2251 }
2252 }
2253
2254 /* Read this BFD's symbols if we haven't done so already. */
2255 if (isymbuf == NULL && symtab_hdr->sh_info != 0)
2256 {
2257 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
2258 if (isymbuf == NULL)
2259 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
2260 symtab_hdr->sh_info, 0,
2261 NULL, NULL, NULL);
2262 if (isymbuf == NULL)
2263 goto error_return;
2264 }
2265
2266 /* Get the value of the symbol referred to by the reloc. */
2267 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
2268 {
2269 Elf_Internal_Sym *isym;
2270 asection *sym_sec = NULL;
2271 const char *sym_name;
2272 char *new_name;
2273 bfd_vma saved_addend;
2274
2275 /* A local symbol. */
2276 isym = isymbuf + ELF32_R_SYM (irel->r_info);
2277 if (isym->st_shndx == SHN_UNDEF)
2278 sym_sec = bfd_und_section_ptr;
2279 else if (isym->st_shndx == SHN_ABS)
2280 sym_sec = bfd_abs_section_ptr;
2281 else if (isym->st_shndx == SHN_COMMON)
2282 sym_sec = bfd_com_section_ptr;
2283 else
2284 sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
2285
2286 sym_name = bfd_elf_string_from_elf_section (abfd,
2287 symtab_hdr->sh_link,
2288 isym->st_name);
2289
2290 if ((sym_sec->flags & SEC_MERGE)
2291 && ELF_ST_TYPE (isym->st_info) == STT_SECTION
2292 && sym_sec->sec_info_type == ELF_INFO_TYPE_MERGE)
2293 {
2294 saved_addend = irel->r_addend;
2295 symval = _bfd_elf_rela_local_sym (abfd, isym, &sym_sec, irel);
2296 symval += irel->r_addend;
2297 irel->r_addend = saved_addend;
2298 }
2299 else
2300 {
2301 symval = (isym->st_value
2302 + sym_sec->output_section->vma
2303 + sym_sec->output_offset);
2304 }
2305 /* Tack on an ID so we can uniquely identify this
2306 local symbol in the global hash table. */
2307 new_name = bfd_malloc ((bfd_size_type) strlen (sym_name) + 10);
2308 if (new_name == 0)
2309 goto error_return;
2310 sprintf (new_name, "%s_%08x", sym_name, sym_sec->id);
2311 sym_name = new_name;
2312
2313 h = (struct elf32_mn10300_link_hash_entry *)
2314 elf_link_hash_lookup (&hash_table->static_hash_table->root,
2315 sym_name, FALSE, FALSE, FALSE);
2316 free (new_name);
2317 }
2318 else
2319 {
2320 unsigned long indx;
2321
2322 /* An external symbol. */
2323 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
2324 h = (struct elf32_mn10300_link_hash_entry *)
2325 (elf_sym_hashes (abfd)[indx]);
2326 BFD_ASSERT (h != NULL);
2327 if (h->root.root.type != bfd_link_hash_defined
2328 && h->root.root.type != bfd_link_hash_defweak)
2329 {
2330 /* This appears to be a reference to an undefined
2331 symbol. Just ignore it--it will be caught by the
2332 regular reloc processing. */
2333 continue;
2334 }
2335
2336 symval = (h->root.root.u.def.value
2337 + h->root.root.u.def.section->output_section->vma
2338 + h->root.root.u.def.section->output_offset);
2339 }
2340
2341 /* For simplicity of coding, we are going to modify the section
2342 contents, the section relocs, and the BFD symbol table. We
2343 must tell the rest of the code not to free up this
2344 information. It would be possible to instead create a table
2345 of changes which have to be made, as is done in coff-mips.c;
2346 that would be more work, but would require less memory when
2347 the linker is run. */
2348
2349 /* Try to turn a 32bit pc-relative branch/call into a 16bit pc-relative
2350 branch/call, also deal with "call" -> "calls" conversions and
2351 insertion of prologue data into "call" instructions. */
2352 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL32
2353 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PLT32)
2354 {
2355 bfd_vma value = symval;
2356
2357 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PLT32
2358 && h != NULL
2359 && ELF_ST_VISIBILITY (h->root.other) != STV_INTERNAL
2360 && ELF_ST_VISIBILITY (h->root.other) != STV_HIDDEN
2361 && h->root.plt.offset != (bfd_vma) -1)
2362 {
2363 asection * splt;
2364
2365 splt = bfd_get_section_by_name (elf_hash_table (link_info)
2366 ->dynobj, ".plt");
2367
2368 value = ((splt->output_section->vma
2369 + splt->output_offset
2370 + h->root.plt.offset)
2371 - (sec->output_section->vma
2372 + sec->output_offset
2373 + irel->r_offset));
2374 }
2375
2376 /* If we've got a "call" instruction that needs to be turned
2377 into a "calls" instruction, do so now. It saves a byte. */
2378 if (h && (h->flags & MN10300_CONVERT_CALL_TO_CALLS))
2379 {
2380 unsigned char code;
2381
2382 /* Get the opcode. */
2383 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2384
2385 /* Make sure we're working with a "call" instruction! */
2386 if (code == 0xdd)
2387 {
2388 /* Note that we've changed the relocs, section contents,
2389 etc. */
2390 elf_section_data (sec)->relocs = internal_relocs;
2391 elf_section_data (sec)->this_hdr.contents = contents;
2392 symtab_hdr->contents = (unsigned char *) isymbuf;
2393
2394 /* Fix the opcode. */
2395 bfd_put_8 (abfd, 0xfc, contents + irel->r_offset - 1);
2396 bfd_put_8 (abfd, 0xff, contents + irel->r_offset);
2397
2398 /* Fix irel->r_offset and irel->r_addend. */
2399 irel->r_offset += 1;
2400 irel->r_addend += 1;
2401
2402 /* Delete one byte of data. */
2403 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2404 irel->r_offset + 3, 1))
2405 goto error_return;
2406
2407 /* That will change things, so, we should relax again.
2408 Note that this is not required, and it may be slow. */
2409 *again = TRUE;
2410 }
2411 }
2412 else if (h)
2413 {
2414 /* We've got a "call" instruction which needs some data
2415 from target function filled in. */
2416 unsigned char code;
2417
2418 /* Get the opcode. */
2419 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2420
2421 /* Insert data from the target function into the "call"
2422 instruction if needed. */
2423 if (code == 0xdd)
2424 {
2425 bfd_put_8 (abfd, h->movm_args, contents + irel->r_offset + 4);
2426 bfd_put_8 (abfd, h->stack_size + h->movm_stack_size,
2427 contents + irel->r_offset + 5);
2428 }
2429 }
2430
2431 /* Deal with pc-relative gunk. */
2432 value -= (sec->output_section->vma + sec->output_offset);
2433 value -= irel->r_offset;
2434 value += irel->r_addend;
2435
2436 /* See if the value will fit in 16 bits, note the high value is
2437 0x7fff + 2 as the target will be two bytes closer if we are
2438 able to relax. */
2439 if ((long) value < 0x8001 && (long) value > -0x8000)
2440 {
2441 unsigned char code;
2442
2443 /* Get the opcode. */
2444 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2445
2446 if (code != 0xdc && code != 0xdd && code != 0xff)
2447 continue;
2448
2449 /* Note that we've changed the relocs, section contents, etc. */
2450 elf_section_data (sec)->relocs = internal_relocs;
2451 elf_section_data (sec)->this_hdr.contents = contents;
2452 symtab_hdr->contents = (unsigned char *) isymbuf;
2453
2454 /* Fix the opcode. */
2455 if (code == 0xdc)
2456 bfd_put_8 (abfd, 0xcc, contents + irel->r_offset - 1);
2457 else if (code == 0xdd)
2458 bfd_put_8 (abfd, 0xcd, contents + irel->r_offset - 1);
2459 else if (code == 0xff)
2460 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
2461
2462 /* Fix the relocation's type. */
2463 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2464 (ELF32_R_TYPE (irel->r_info)
2465 == (int) R_MN10300_PLT32)
2466 ? R_MN10300_PLT16 :
2467 R_MN10300_PCREL16);
2468
2469 /* Delete two bytes of data. */
2470 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2471 irel->r_offset + 1, 2))
2472 goto error_return;
2473
2474 /* That will change things, so, we should relax again.
2475 Note that this is not required, and it may be slow. */
2476 *again = TRUE;
2477 }
2478 }
2479
2480 /* Try to turn a 16bit pc-relative branch into a 8bit pc-relative
2481 branch. */
2482 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL16)
2483 {
2484 bfd_vma value = symval;
2485
2486 /* If we've got a "call" instruction that needs to be turned
2487 into a "calls" instruction, do so now. It saves a byte. */
2488 if (h && (h->flags & MN10300_CONVERT_CALL_TO_CALLS))
2489 {
2490 unsigned char code;
2491
2492 /* Get the opcode. */
2493 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2494
2495 /* Make sure we're working with a "call" instruction! */
2496 if (code == 0xcd)
2497 {
2498 /* Note that we've changed the relocs, section contents,
2499 etc. */
2500 elf_section_data (sec)->relocs = internal_relocs;
2501 elf_section_data (sec)->this_hdr.contents = contents;
2502 symtab_hdr->contents = (unsigned char *) isymbuf;
2503
2504 /* Fix the opcode. */
2505 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 1);
2506 bfd_put_8 (abfd, 0xff, contents + irel->r_offset);
2507
2508 /* Fix irel->r_offset and irel->r_addend. */
2509 irel->r_offset += 1;
2510 irel->r_addend += 1;
2511
2512 /* Delete one byte of data. */
2513 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2514 irel->r_offset + 1, 1))
2515 goto error_return;
2516
2517 /* That will change things, so, we should relax again.
2518 Note that this is not required, and it may be slow. */
2519 *again = TRUE;
2520 }
2521 }
2522 else if (h)
2523 {
2524 unsigned char code;
2525
2526 /* Get the opcode. */
2527 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2528
2529 /* Insert data from the target function into the "call"
2530 instruction if needed. */
2531 if (code == 0xcd)
2532 {
2533 bfd_put_8 (abfd, h->movm_args, contents + irel->r_offset + 2);
2534 bfd_put_8 (abfd, h->stack_size + h->movm_stack_size,
2535 contents + irel->r_offset + 3);
2536 }
2537 }
2538
2539 /* Deal with pc-relative gunk. */
2540 value -= (sec->output_section->vma + sec->output_offset);
2541 value -= irel->r_offset;
2542 value += irel->r_addend;
2543
2544 /* See if the value will fit in 8 bits, note the high value is
2545 0x7f + 1 as the target will be one bytes closer if we are
2546 able to relax. */
2547 if ((long) value < 0x80 && (long) value > -0x80)
2548 {
2549 unsigned char code;
2550
2551 /* Get the opcode. */
2552 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2553
2554 if (code != 0xcc)
2555 continue;
2556
2557 /* Note that we've changed the relocs, section contents, etc. */
2558 elf_section_data (sec)->relocs = internal_relocs;
2559 elf_section_data (sec)->this_hdr.contents = contents;
2560 symtab_hdr->contents = (unsigned char *) isymbuf;
2561
2562 /* Fix the opcode. */
2563 bfd_put_8 (abfd, 0xca, contents + irel->r_offset - 1);
2564
2565 /* Fix the relocation's type. */
2566 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2567 R_MN10300_PCREL8);
2568
2569 /* Delete one byte of data. */
2570 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2571 irel->r_offset + 1, 1))
2572 goto error_return;
2573
2574 /* That will change things, so, we should relax again.
2575 Note that this is not required, and it may be slow. */
2576 *again = TRUE;
2577 }
2578 }
2579
2580 /* Try to eliminate an unconditional 8 bit pc-relative branch
2581 which immediately follows a conditional 8 bit pc-relative
2582 branch around the unconditional branch.
2583
2584 original: new:
2585 bCC lab1 bCC' lab2
2586 bra lab2
2587 lab1: lab1:
2588
2589 This happens when the bCC can't reach lab2 at assembly time,
2590 but due to other relaxations it can reach at link time. */
2591 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL8)
2592 {
2593 Elf_Internal_Rela *nrel;
2594 bfd_vma value = symval;
2595 unsigned char code;
2596
2597 /* Deal with pc-relative gunk. */
2598 value -= (sec->output_section->vma + sec->output_offset);
2599 value -= irel->r_offset;
2600 value += irel->r_addend;
2601
2602 /* Do nothing if this reloc is the last byte in the section. */
2603 if (irel->r_offset == sec->size)
2604 continue;
2605
2606 /* See if the next instruction is an unconditional pc-relative
2607 branch, more often than not this test will fail, so we
2608 test it first to speed things up. */
2609 code = bfd_get_8 (abfd, contents + irel->r_offset + 1);
2610 if (code != 0xca)
2611 continue;
2612
2613 /* Also make sure the next relocation applies to the next
2614 instruction and that it's a pc-relative 8 bit branch. */
2615 nrel = irel + 1;
2616 if (nrel == irelend
2617 || irel->r_offset + 2 != nrel->r_offset
2618 || ELF32_R_TYPE (nrel->r_info) != (int) R_MN10300_PCREL8)
2619 continue;
2620
2621 /* Make sure our destination immediately follows the
2622 unconditional branch. */
2623 if (symval != (sec->output_section->vma + sec->output_offset
2624 + irel->r_offset + 3))
2625 continue;
2626
2627 /* Now make sure we are a conditional branch. This may not
2628 be necessary, but why take the chance.
2629
2630 Note these checks assume that R_MN10300_PCREL8 relocs
2631 only occur on bCC and bCCx insns. If they occured
2632 elsewhere, we'd need to know the start of this insn
2633 for this check to be accurate. */
2634 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2635 if (code != 0xc0 && code != 0xc1 && code != 0xc2
2636 && code != 0xc3 && code != 0xc4 && code != 0xc5
2637 && code != 0xc6 && code != 0xc7 && code != 0xc8
2638 && code != 0xc9 && code != 0xe8 && code != 0xe9
2639 && code != 0xea && code != 0xeb)
2640 continue;
2641
2642 /* We also have to be sure there is no symbol/label
2643 at the unconditional branch. */
2644 if (mn10300_elf_symbol_address_p (abfd, sec, isymbuf,
2645 irel->r_offset + 1))
2646 continue;
2647
2648 /* Note that we've changed the relocs, section contents, etc. */
2649 elf_section_data (sec)->relocs = internal_relocs;
2650 elf_section_data (sec)->this_hdr.contents = contents;
2651 symtab_hdr->contents = (unsigned char *) isymbuf;
2652
2653 /* Reverse the condition of the first branch. */
2654 switch (code)
2655 {
2656 case 0xc8:
2657 code = 0xc9;
2658 break;
2659 case 0xc9:
2660 code = 0xc8;
2661 break;
2662 case 0xc0:
2663 code = 0xc2;
2664 break;
2665 case 0xc2:
2666 code = 0xc0;
2667 break;
2668 case 0xc3:
2669 code = 0xc1;
2670 break;
2671 case 0xc1:
2672 code = 0xc3;
2673 break;
2674 case 0xc4:
2675 code = 0xc6;
2676 break;
2677 case 0xc6:
2678 code = 0xc4;
2679 break;
2680 case 0xc7:
2681 code = 0xc5;
2682 break;
2683 case 0xc5:
2684 code = 0xc7;
2685 break;
2686 case 0xe8:
2687 code = 0xe9;
2688 break;
2689 case 0x9d:
2690 code = 0xe8;
2691 break;
2692 case 0xea:
2693 code = 0xeb;
2694 break;
2695 case 0xeb:
2696 code = 0xea;
2697 break;
2698 }
2699 bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
2700
2701 /* Set the reloc type and symbol for the first branch
2702 from the second branch. */
2703 irel->r_info = nrel->r_info;
2704
2705 /* Make the reloc for the second branch a null reloc. */
2706 nrel->r_info = ELF32_R_INFO (ELF32_R_SYM (nrel->r_info),
2707 R_MN10300_NONE);
2708
2709 /* Delete two bytes of data. */
2710 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2711 irel->r_offset + 1, 2))
2712 goto error_return;
2713
2714 /* That will change things, so, we should relax again.
2715 Note that this is not required, and it may be slow. */
2716 *again = TRUE;
2717 }
2718
2719 /* Try to turn a 24 immediate, displacement or absolute address
2720 into a 8 immediate, displacement or absolute address. */
2721 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_24)
2722 {
2723 bfd_vma value = symval;
2724 value += irel->r_addend;
2725
2726 /* See if the value will fit in 8 bits. */
2727 if ((long) value < 0x7f && (long) value > -0x80)
2728 {
2729 unsigned char code;
2730
2731 /* AM33 insns which have 24 operands are 6 bytes long and
2732 will have 0xfd as the first byte. */
2733
2734 /* Get the first opcode. */
2735 code = bfd_get_8 (abfd, contents + irel->r_offset - 3);
2736
2737 if (code == 0xfd)
2738 {
2739 /* Get the second opcode. */
2740 code = bfd_get_8 (abfd, contents + irel->r_offset - 2);
2741
2742 /* We can not relax 0x6b, 0x7b, 0x8b, 0x9b as no 24bit
2743 equivalent instructions exists. */
2744 if (code != 0x6b && code != 0x7b
2745 && code != 0x8b && code != 0x9b
2746 && ((code & 0x0f) == 0x09 || (code & 0x0f) == 0x08
2747 || (code & 0x0f) == 0x0a || (code & 0x0f) == 0x0b
2748 || (code & 0x0f) == 0x0e))
2749 {
2750 /* Not safe if the high bit is on as relaxing may
2751 move the value out of high mem and thus not fit
2752 in a signed 8bit value. This is currently over
2753 conservative. */
2754 if ((value & 0x80) == 0)
2755 {
2756 /* Note that we've changed the relocation contents,
2757 etc. */
2758 elf_section_data (sec)->relocs = internal_relocs;
2759 elf_section_data (sec)->this_hdr.contents = contents;
2760 symtab_hdr->contents = (unsigned char *) isymbuf;
2761
2762 /* Fix the opcode. */
2763 bfd_put_8 (abfd, 0xfb, contents + irel->r_offset - 3);
2764 bfd_put_8 (abfd, code, contents + irel->r_offset - 2);
2765
2766 /* Fix the relocation's type. */
2767 irel->r_info =
2768 ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2769 R_MN10300_8);
2770
2771 /* Delete two bytes of data. */
2772 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2773 irel->r_offset + 1, 2))
2774 goto error_return;
2775
2776 /* That will change things, so, we should relax
2777 again. Note that this is not required, and it
2778 may be slow. */
2779 *again = TRUE;
2780 break;
2781 }
2782 }
2783 }
2784 }
2785 }
2786
2787 /* Try to turn a 32bit immediate, displacement or absolute address
2788 into a 16bit immediate, displacement or absolute address. */
2789 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_32
2790 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOT32
2791 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOTOFF32
2792 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOTPC32)
2793 {
2794 bfd_vma value = symval;
2795
2796 if (ELF32_R_TYPE (irel->r_info) != (int) R_MN10300_32)
2797 {
2798 asection * sgot;
2799
2800 sgot = bfd_get_section_by_name (elf_hash_table (link_info)
2801 ->dynobj, ".got");
2802
2803 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOT32)
2804 {
2805 value = sgot->output_offset;
2806
2807 if (h)
2808 value += h->root.got.offset;
2809 else
2810 value += (elf_local_got_offsets
2811 (abfd)[ELF32_R_SYM (irel->r_info)]);
2812 }
2813 else if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOTOFF32)
2814 value -= sgot->output_section->vma;
2815 else if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOTPC32)
2816 value = (sgot->output_section->vma
2817 - (sec->output_section->vma
2818 + sec->output_offset
2819 + irel->r_offset));
2820 else
2821 abort ();
2822 }
2823
2824 value += irel->r_addend;
2825
2826 /* See if the value will fit in 24 bits.
2827 We allow any 16bit match here. We prune those we can't
2828 handle below. */
2829 if ((long) value < 0x7fffff && (long) value > -0x800000)
2830 {
2831 unsigned char code;
2832
2833 /* AM33 insns which have 32bit operands are 7 bytes long and
2834 will have 0xfe as the first byte. */
2835
2836 /* Get the first opcode. */
2837 code = bfd_get_8 (abfd, contents + irel->r_offset - 3);
2838
2839 if (code == 0xfe)
2840 {
2841 /* Get the second opcode. */
2842 code = bfd_get_8 (abfd, contents + irel->r_offset - 2);
2843
2844 /* All the am33 32 -> 24 relaxing possibilities. */
2845 /* We can not relax 0x6b, 0x7b, 0x8b, 0x9b as no 24bit
2846 equivalent instructions exists. */
2847 if (code != 0x6b && code != 0x7b
2848 && code != 0x8b && code != 0x9b
2849 && (ELF32_R_TYPE (irel->r_info)
2850 != (int) R_MN10300_GOTPC32)
2851 && ((code & 0x0f) == 0x09 || (code & 0x0f) == 0x08
2852 || (code & 0x0f) == 0x0a || (code & 0x0f) == 0x0b
2853 || (code & 0x0f) == 0x0e))
2854 {
2855 /* Not safe if the high bit is on as relaxing may
2856 move the value out of high mem and thus not fit
2857 in a signed 16bit value. This is currently over
2858 conservative. */
2859 if ((value & 0x8000) == 0)
2860 {
2861 /* Note that we've changed the relocation contents,
2862 etc. */
2863 elf_section_data (sec)->relocs = internal_relocs;
2864 elf_section_data (sec)->this_hdr.contents = contents;
2865 symtab_hdr->contents = (unsigned char *) isymbuf;
2866
2867 /* Fix the opcode. */
2868 bfd_put_8 (abfd, 0xfd, contents + irel->r_offset - 3);
2869 bfd_put_8 (abfd, code, contents + irel->r_offset - 2);
2870
2871 /* Fix the relocation's type. */
2872 irel->r_info =
2873 ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2874 (ELF32_R_TYPE (irel->r_info)
2875 == (int) R_MN10300_GOTOFF32)
2876 ? R_MN10300_GOTOFF24
2877 : (ELF32_R_TYPE (irel->r_info)
2878 == (int) R_MN10300_GOT32)
2879 ? R_MN10300_GOT24 :
2880 R_MN10300_24);
2881
2882 /* Delete one byte of data. */
2883 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2884 irel->r_offset + 3, 1))
2885 goto error_return;
2886
2887 /* That will change things, so, we should relax
2888 again. Note that this is not required, and it
2889 may be slow. */
2890 *again = TRUE;
2891 break;
2892 }
2893 }
2894 }
2895 }
2896
2897 /* See if the value will fit in 16 bits.
2898 We allow any 16bit match here. We prune those we can't
2899 handle below. */
2900 if ((long) value < 0x7fff && (long) value > -0x8000)
2901 {
2902 unsigned char code;
2903
2904 /* Most insns which have 32bit operands are 6 bytes long;
2905 exceptions are pcrel insns and bit insns.
2906
2907 We handle pcrel insns above. We don't bother trying
2908 to handle the bit insns here.
2909
2910 The first byte of the remaining insns will be 0xfc. */
2911
2912 /* Get the first opcode. */
2913 code = bfd_get_8 (abfd, contents + irel->r_offset - 2);
2914
2915 if (code != 0xfc)
2916 continue;
2917
2918 /* Get the second opcode. */
2919 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2920
2921 if ((code & 0xf0) < 0x80)
2922 switch (code & 0xf0)
2923 {
2924 /* mov (d32,am),dn -> mov (d32,am),dn
2925 mov dm,(d32,am) -> mov dn,(d32,am)
2926 mov (d32,am),an -> mov (d32,am),an
2927 mov dm,(d32,am) -> mov dn,(d32,am)
2928 movbu (d32,am),dn -> movbu (d32,am),dn
2929 movbu dm,(d32,am) -> movbu dn,(d32,am)
2930 movhu (d32,am),dn -> movhu (d32,am),dn
2931 movhu dm,(d32,am) -> movhu dn,(d32,am) */
2932 case 0x00:
2933 case 0x10:
2934 case 0x20:
2935 case 0x30:
2936 case 0x40:
2937 case 0x50:
2938 case 0x60:
2939 case 0x70:
2940 /* Not safe if the high bit is on as relaxing may
2941 move the value out of high mem and thus not fit
2942 in a signed 16bit value. */
2943 if (code == 0xcc
2944 && (value & 0x8000))
2945 continue;
2946
2947 /* Note that we've changed the relocation contents, etc. */
2948 elf_section_data (sec)->relocs = internal_relocs;
2949 elf_section_data (sec)->this_hdr.contents = contents;
2950 symtab_hdr->contents = (unsigned char *) isymbuf;
2951
2952 /* Fix the opcode. */
2953 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
2954 bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
2955
2956 /* Fix the relocation's type. */
2957 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2958 (ELF32_R_TYPE (irel->r_info)
2959 == (int) R_MN10300_GOTOFF32)
2960 ? R_MN10300_GOTOFF16
2961 : (ELF32_R_TYPE (irel->r_info)
2962 == (int) R_MN10300_GOT32)
2963 ? R_MN10300_GOT16
2964 : (ELF32_R_TYPE (irel->r_info)
2965 == (int) R_MN10300_GOTPC32)
2966 ? R_MN10300_GOTPC16 :
2967 R_MN10300_16);
2968
2969 /* Delete two bytes of data. */
2970 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2971 irel->r_offset + 2, 2))
2972 goto error_return;
2973
2974 /* That will change things, so, we should relax again.
2975 Note that this is not required, and it may be slow. */
2976 *again = TRUE;
2977 break;
2978 }
2979 else if ((code & 0xf0) == 0x80
2980 || (code & 0xf0) == 0x90)
2981 switch (code & 0xf3)
2982 {
2983 /* mov dn,(abs32) -> mov dn,(abs16)
2984 movbu dn,(abs32) -> movbu dn,(abs16)
2985 movhu dn,(abs32) -> movhu dn,(abs16) */
2986 case 0x81:
2987 case 0x82:
2988 case 0x83:
2989 /* Note that we've changed the relocation contents, etc. */
2990 elf_section_data (sec)->relocs = internal_relocs;
2991 elf_section_data (sec)->this_hdr.contents = contents;
2992 symtab_hdr->contents = (unsigned char *) isymbuf;
2993
2994 if ((code & 0xf3) == 0x81)
2995 code = 0x01 + (code & 0x0c);
2996 else if ((code & 0xf3) == 0x82)
2997 code = 0x02 + (code & 0x0c);
2998 else if ((code & 0xf3) == 0x83)
2999 code = 0x03 + (code & 0x0c);
3000 else
3001 abort ();
3002
3003 /* Fix the opcode. */
3004 bfd_put_8 (abfd, code, contents + irel->r_offset - 2);
3005
3006 /* Fix the relocation's type. */
3007 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3008 (ELF32_R_TYPE (irel->r_info)
3009 == (int) R_MN10300_GOTOFF32)
3010 ? R_MN10300_GOTOFF16
3011 : (ELF32_R_TYPE (irel->r_info)
3012 == (int) R_MN10300_GOT32)
3013 ? R_MN10300_GOT16
3014 : (ELF32_R_TYPE (irel->r_info)
3015 == (int) R_MN10300_GOTPC32)
3016 ? R_MN10300_GOTPC16 :
3017 R_MN10300_16);
3018
3019 /* The opcode got shorter too, so we have to fix the
3020 addend and offset too! */
3021 irel->r_offset -= 1;
3022
3023 /* Delete three bytes of data. */
3024 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3025 irel->r_offset + 1, 3))
3026 goto error_return;
3027
3028 /* That will change things, so, we should relax again.
3029 Note that this is not required, and it may be slow. */
3030 *again = TRUE;
3031 break;
3032
3033 /* mov am,(abs32) -> mov am,(abs16)
3034 mov am,(d32,sp) -> mov am,(d16,sp)
3035 mov dm,(d32,sp) -> mov dm,(d32,sp)
3036 movbu dm,(d32,sp) -> movbu dm,(d32,sp)
3037 movhu dm,(d32,sp) -> movhu dm,(d32,sp) */
3038 case 0x80:
3039 case 0x90:
3040 case 0x91:
3041 case 0x92:
3042 case 0x93:
3043 /* sp-based offsets are zero-extended. */
3044 if (code >= 0x90 && code <= 0x93
3045 && (long)value < 0)
3046 continue;
3047
3048 /* Note that we've changed the relocation contents, etc. */
3049 elf_section_data (sec)->relocs = internal_relocs;
3050 elf_section_data (sec)->this_hdr.contents = contents;
3051 symtab_hdr->contents = (unsigned char *) isymbuf;
3052
3053 /* Fix the opcode. */
3054 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
3055 bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
3056
3057 /* Fix the relocation's type. */
3058 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3059 (ELF32_R_TYPE (irel->r_info)
3060 == (int) R_MN10300_GOTOFF32)
3061 ? R_MN10300_GOTOFF16
3062 : (ELF32_R_TYPE (irel->r_info)
3063 == (int) R_MN10300_GOT32)
3064 ? R_MN10300_GOT16
3065 : (ELF32_R_TYPE (irel->r_info)
3066 == (int) R_MN10300_GOTPC32)
3067 ? R_MN10300_GOTPC16 :
3068 R_MN10300_16);
3069
3070 /* Delete two bytes of data. */
3071 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3072 irel->r_offset + 2, 2))
3073 goto error_return;
3074
3075 /* That will change things, so, we should relax again.
3076 Note that this is not required, and it may be slow. */
3077 *again = TRUE;
3078 break;
3079 }
3080 else if ((code & 0xf0) < 0xf0)
3081 switch (code & 0xfc)
3082 {
3083 /* mov imm32,dn -> mov imm16,dn
3084 mov imm32,an -> mov imm16,an
3085 mov (abs32),dn -> mov (abs16),dn
3086 movbu (abs32),dn -> movbu (abs16),dn
3087 movhu (abs32),dn -> movhu (abs16),dn */
3088 case 0xcc:
3089 case 0xdc:
3090 case 0xa4:
3091 case 0xa8:
3092 case 0xac:
3093 /* Not safe if the high bit is on as relaxing may
3094 move the value out of high mem and thus not fit
3095 in a signed 16bit value. */
3096 if (code == 0xcc
3097 && (value & 0x8000))
3098 continue;
3099
3100 /* mov imm16, an zero-extends the immediate. */
3101 if (code == 0xdc
3102 && (long)value < 0)
3103 continue;
3104
3105 /* Note that we've changed the relocation contents, etc. */
3106 elf_section_data (sec)->relocs = internal_relocs;
3107 elf_section_data (sec)->this_hdr.contents = contents;
3108 symtab_hdr->contents = (unsigned char *) isymbuf;
3109
3110 if ((code & 0xfc) == 0xcc)
3111 code = 0x2c + (code & 0x03);
3112 else if ((code & 0xfc) == 0xdc)
3113 code = 0x24 + (code & 0x03);
3114 else if ((code & 0xfc) == 0xa4)
3115 code = 0x30 + (code & 0x03);
3116 else if ((code & 0xfc) == 0xa8)
3117 code = 0x34 + (code & 0x03);
3118 else if ((code & 0xfc) == 0xac)
3119 code = 0x38 + (code & 0x03);
3120 else
3121 abort ();
3122
3123 /* Fix the opcode. */
3124 bfd_put_8 (abfd, code, contents + irel->r_offset - 2);
3125
3126 /* Fix the relocation's type. */
3127 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3128 (ELF32_R_TYPE (irel->r_info)
3129 == (int) R_MN10300_GOTOFF32)
3130 ? R_MN10300_GOTOFF16
3131 : (ELF32_R_TYPE (irel->r_info)
3132 == (int) R_MN10300_GOT32)
3133 ? R_MN10300_GOT16
3134 : (ELF32_R_TYPE (irel->r_info)
3135 == (int) R_MN10300_GOTPC32)
3136 ? R_MN10300_GOTPC16 :
3137 R_MN10300_16);
3138
3139 /* The opcode got shorter too, so we have to fix the
3140 addend and offset too! */
3141 irel->r_offset -= 1;
3142
3143 /* Delete three bytes of data. */
3144 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3145 irel->r_offset + 1, 3))
3146 goto error_return;
3147
3148 /* That will change things, so, we should relax again.
3149 Note that this is not required, and it may be slow. */
3150 *again = TRUE;
3151 break;
3152
3153 /* mov (abs32),an -> mov (abs16),an
3154 mov (d32,sp),an -> mov (d16,sp),an
3155 mov (d32,sp),dn -> mov (d16,sp),dn
3156 movbu (d32,sp),dn -> movbu (d16,sp),dn
3157 movhu (d32,sp),dn -> movhu (d16,sp),dn
3158 add imm32,dn -> add imm16,dn
3159 cmp imm32,dn -> cmp imm16,dn
3160 add imm32,an -> add imm16,an
3161 cmp imm32,an -> cmp imm16,an
3162 and imm32,dn -> and imm16,dn
3163 or imm32,dn -> or imm16,dn
3164 xor imm32,dn -> xor imm16,dn
3165 btst imm32,dn -> btst imm16,dn */
3166
3167 case 0xa0:
3168 case 0xb0:
3169 case 0xb1:
3170 case 0xb2:
3171 case 0xb3:
3172 case 0xc0:
3173 case 0xc8:
3174
3175 case 0xd0:
3176 case 0xd8:
3177 case 0xe0:
3178 case 0xe1:
3179 case 0xe2:
3180 case 0xe3:
3181 /* cmp imm16, an zero-extends the immediate. */
3182 if (code == 0xdc
3183 && (long)value < 0)
3184 continue;
3185
3186 /* So do sp-based offsets. */
3187 if (code >= 0xb0 && code <= 0xb3
3188 && (long)value < 0)
3189 continue;
3190
3191 /* Note that we've changed the relocation contents, etc. */
3192 elf_section_data (sec)->relocs = internal_relocs;
3193 elf_section_data (sec)->this_hdr.contents = contents;
3194 symtab_hdr->contents = (unsigned char *) isymbuf;
3195
3196 /* Fix the opcode. */
3197 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
3198 bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
3199
3200 /* Fix the relocation's type. */
3201 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3202 (ELF32_R_TYPE (irel->r_info)
3203 == (int) R_MN10300_GOTOFF32)
3204 ? R_MN10300_GOTOFF16
3205 : (ELF32_R_TYPE (irel->r_info)
3206 == (int) R_MN10300_GOT32)
3207 ? R_MN10300_GOT16
3208 : (ELF32_R_TYPE (irel->r_info)
3209 == (int) R_MN10300_GOTPC32)
3210 ? R_MN10300_GOTPC16 :
3211 R_MN10300_16);
3212
3213 /* Delete two bytes of data. */
3214 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3215 irel->r_offset + 2, 2))
3216 goto error_return;
3217
3218 /* That will change things, so, we should relax again.
3219 Note that this is not required, and it may be slow. */
3220 *again = TRUE;
3221 break;
3222 }
3223 else if (code == 0xfe)
3224 {
3225 /* add imm32,sp -> add imm16,sp */
3226
3227 /* Note that we've changed the relocation contents, etc. */
3228 elf_section_data (sec)->relocs = internal_relocs;
3229 elf_section_data (sec)->this_hdr.contents = contents;
3230 symtab_hdr->contents = (unsigned char *) isymbuf;
3231
3232 /* Fix the opcode. */
3233 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
3234 bfd_put_8 (abfd, 0xfe, contents + irel->r_offset - 1);
3235
3236 /* Fix the relocation's type. */
3237 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3238 (ELF32_R_TYPE (irel->r_info)
3239 == (int) R_MN10300_GOT32)
3240 ? R_MN10300_GOT16
3241 : (ELF32_R_TYPE (irel->r_info)
3242 == (int) R_MN10300_GOTOFF32)
3243 ? R_MN10300_GOTOFF16
3244 : (ELF32_R_TYPE (irel->r_info)
3245 == (int) R_MN10300_GOTPC32)
3246 ? R_MN10300_GOTPC16 :
3247 R_MN10300_16);
3248
3249 /* Delete two bytes of data. */
3250 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3251 irel->r_offset + 2, 2))
3252 goto error_return;
3253
3254 /* That will change things, so, we should relax again.
3255 Note that this is not required, and it may be slow. */
3256 *again = TRUE;
3257 break;
3258 }
3259 }
3260 }
3261 }
3262
3263 if (isymbuf != NULL
3264 && symtab_hdr->contents != (unsigned char *) isymbuf)
3265 {
3266 if (! link_info->keep_memory)
3267 free (isymbuf);
3268 else
3269 {
3270 /* Cache the symbols for elf_link_input_bfd. */
3271 symtab_hdr->contents = (unsigned char *) isymbuf;
3272 }
3273 }
3274
3275 if (contents != NULL
3276 && elf_section_data (sec)->this_hdr.contents != contents)
3277 {
3278 if (! link_info->keep_memory)
3279 free (contents);
3280 else
3281 {
3282 /* Cache the section contents for elf_link_input_bfd. */
3283 elf_section_data (sec)->this_hdr.contents = contents;
3284 }
3285 }
3286
3287 if (internal_relocs != NULL
3288 && elf_section_data (sec)->relocs != internal_relocs)
3289 free (internal_relocs);
3290
3291 return TRUE;
3292
3293 error_return:
3294 if (isymbuf != NULL
3295 && symtab_hdr->contents != (unsigned char *) isymbuf)
3296 free (isymbuf);
3297 if (contents != NULL
3298 && elf_section_data (section)->this_hdr.contents != contents)
3299 free (contents);
3300 if (internal_relocs != NULL
3301 && elf_section_data (section)->relocs != internal_relocs)
3302 free (internal_relocs);
3303
3304 return FALSE;
3305 }
3306
3307 /* Compute the stack size and movm arguments for the function
3308 referred to by HASH at address ADDR in section with
3309 contents CONTENTS, store the information in the hash table. */
3310 static void
3311 compute_function_info (abfd, hash, addr, contents)
3312 bfd *abfd;
3313 struct elf32_mn10300_link_hash_entry *hash;
3314 bfd_vma addr;
3315 unsigned char *contents;
3316 {
3317 unsigned char byte1, byte2;
3318 /* We only care about a very small subset of the possible prologue
3319 sequences here. Basically we look for:
3320
3321 movm [d2,d3,a2,a3],sp (optional)
3322 add <size>,sp (optional, and only for sizes which fit in an unsigned
3323 8 bit number)
3324
3325 If we find anything else, we quit. */
3326
3327 /* Look for movm [regs],sp */
3328 byte1 = bfd_get_8 (abfd, contents + addr);
3329 byte2 = bfd_get_8 (abfd, contents + addr + 1);
3330
3331 if (byte1 == 0xcf)
3332 {
3333 hash->movm_args = byte2;
3334 addr += 2;
3335 byte1 = bfd_get_8 (abfd, contents + addr);
3336 byte2 = bfd_get_8 (abfd, contents + addr + 1);
3337 }
3338
3339 /* Now figure out how much stack space will be allocated by the movm
3340 instruction. We need this kept separate from the function's normal
3341 stack space. */
3342 if (hash->movm_args)
3343 {
3344 /* Space for d2. */
3345 if (hash->movm_args & 0x80)
3346 hash->movm_stack_size += 4;
3347
3348 /* Space for d3. */
3349 if (hash->movm_args & 0x40)
3350 hash->movm_stack_size += 4;
3351
3352 /* Space for a2. */
3353 if (hash->movm_args & 0x20)
3354 hash->movm_stack_size += 4;
3355
3356 /* Space for a3. */
3357 if (hash->movm_args & 0x10)
3358 hash->movm_stack_size += 4;
3359
3360 /* "other" space. d0, d1, a0, a1, mdr, lir, lar, 4 byte pad. */
3361 if (hash->movm_args & 0x08)
3362 hash->movm_stack_size += 8 * 4;
3363
3364 if (bfd_get_mach (abfd) == bfd_mach_am33
3365 || bfd_get_mach (abfd) == bfd_mach_am33_2)
3366 {
3367 /* "exother" space. e0, e1, mdrq, mcrh, mcrl, mcvf */
3368 if (hash->movm_args & 0x1)
3369 hash->movm_stack_size += 6 * 4;
3370
3371 /* exreg1 space. e4, e5, e6, e7 */
3372 if (hash->movm_args & 0x2)
3373 hash->movm_stack_size += 4 * 4;
3374
3375 /* exreg0 space. e2, e3 */
3376 if (hash->movm_args & 0x4)
3377 hash->movm_stack_size += 2 * 4;
3378 }
3379 }
3380
3381 /* Now look for the two stack adjustment variants. */
3382 if (byte1 == 0xf8 && byte2 == 0xfe)
3383 {
3384 int temp = bfd_get_8 (abfd, contents + addr + 2);
3385 temp = ((temp & 0xff) ^ (~0x7f)) + 0x80;
3386
3387 hash->stack_size = -temp;
3388 }
3389 else if (byte1 == 0xfa && byte2 == 0xfe)
3390 {
3391 int temp = bfd_get_16 (abfd, contents + addr + 2);
3392 temp = ((temp & 0xffff) ^ (~0x7fff)) + 0x8000;
3393 temp = -temp;
3394
3395 if (temp < 255)
3396 hash->stack_size = temp;
3397 }
3398
3399 /* If the total stack to be allocated by the call instruction is more
3400 than 255 bytes, then we can't remove the stack adjustment by using
3401 "call" (we might still be able to remove the "movm" instruction. */
3402 if (hash->stack_size + hash->movm_stack_size > 255)
3403 hash->stack_size = 0;
3404
3405 return;
3406 }
3407
3408 /* Delete some bytes from a section while relaxing. */
3409
3410 static bfd_boolean
3411 mn10300_elf_relax_delete_bytes (abfd, sec, addr, count)
3412 bfd *abfd;
3413 asection *sec;
3414 bfd_vma addr;
3415 int count;
3416 {
3417 Elf_Internal_Shdr *symtab_hdr;
3418 unsigned int sec_shndx;
3419 bfd_byte *contents;
3420 Elf_Internal_Rela *irel, *irelend;
3421 Elf_Internal_Rela *irelalign;
3422 bfd_vma toaddr;
3423 Elf_Internal_Sym *isym, *isymend;
3424 struct elf_link_hash_entry **sym_hashes;
3425 struct elf_link_hash_entry **end_hashes;
3426 unsigned int symcount;
3427
3428 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
3429
3430 contents = elf_section_data (sec)->this_hdr.contents;
3431
3432 /* The deletion must stop at the next ALIGN reloc for an aligment
3433 power larger than the number of bytes we are deleting. */
3434
3435 irelalign = NULL;
3436 toaddr = sec->size;
3437
3438 irel = elf_section_data (sec)->relocs;
3439 irelend = irel + sec->reloc_count;
3440
3441 /* Actually delete the bytes. */
3442 memmove (contents + addr, contents + addr + count,
3443 (size_t) (toaddr - addr - count));
3444 sec->size -= count;
3445
3446 /* Adjust all the relocs. */
3447 for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
3448 {
3449 /* Get the new reloc address. */
3450 if ((irel->r_offset > addr
3451 && irel->r_offset < toaddr))
3452 irel->r_offset -= count;
3453 }
3454
3455 /* Adjust the local symbols defined in this section. */
3456 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3457 isym = (Elf_Internal_Sym *) symtab_hdr->contents;
3458 for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
3459 {
3460 if (isym->st_shndx == sec_shndx
3461 && isym->st_value > addr
3462 && isym->st_value < toaddr)
3463 isym->st_value -= count;
3464 }
3465
3466 /* Now adjust the global symbols defined in this section. */
3467 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
3468 - symtab_hdr->sh_info);
3469 sym_hashes = elf_sym_hashes (abfd);
3470 end_hashes = sym_hashes + symcount;
3471 for (; sym_hashes < end_hashes; sym_hashes++)
3472 {
3473 struct elf_link_hash_entry *sym_hash = *sym_hashes;
3474 if ((sym_hash->root.type == bfd_link_hash_defined
3475 || sym_hash->root.type == bfd_link_hash_defweak)
3476 && sym_hash->root.u.def.section == sec
3477 && sym_hash->root.u.def.value > addr
3478 && sym_hash->root.u.def.value < toaddr)
3479 {
3480 sym_hash->root.u.def.value -= count;
3481 }
3482 }
3483
3484 return TRUE;
3485 }
3486
3487 /* Return TRUE if a symbol exists at the given address, else return
3488 FALSE. */
3489 static bfd_boolean
3490 mn10300_elf_symbol_address_p (abfd, sec, isym, addr)
3491 bfd *abfd;
3492 asection *sec;
3493 Elf_Internal_Sym *isym;
3494 bfd_vma addr;
3495 {
3496 Elf_Internal_Shdr *symtab_hdr;
3497 unsigned int sec_shndx;
3498 Elf_Internal_Sym *isymend;
3499 struct elf_link_hash_entry **sym_hashes;
3500 struct elf_link_hash_entry **end_hashes;
3501 unsigned int symcount;
3502
3503 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
3504
3505 /* Examine all the symbols. */
3506 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3507 for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
3508 {
3509 if (isym->st_shndx == sec_shndx
3510 && isym->st_value == addr)
3511 return TRUE;
3512 }
3513
3514 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
3515 - symtab_hdr->sh_info);
3516 sym_hashes = elf_sym_hashes (abfd);
3517 end_hashes = sym_hashes + symcount;
3518 for (; sym_hashes < end_hashes; sym_hashes++)
3519 {
3520 struct elf_link_hash_entry *sym_hash = *sym_hashes;
3521 if ((sym_hash->root.type == bfd_link_hash_defined
3522 || sym_hash->root.type == bfd_link_hash_defweak)
3523 && sym_hash->root.u.def.section == sec
3524 && sym_hash->root.u.def.value == addr)
3525 return TRUE;
3526 }
3527
3528 return FALSE;
3529 }
3530
3531 /* This is a version of bfd_generic_get_relocated_section_contents
3532 which uses mn10300_elf_relocate_section. */
3533
3534 static bfd_byte *
3535 mn10300_elf_get_relocated_section_contents (output_bfd, link_info, link_order,
3536 data, relocatable, symbols)
3537 bfd *output_bfd;
3538 struct bfd_link_info *link_info;
3539 struct bfd_link_order *link_order;
3540 bfd_byte *data;
3541 bfd_boolean relocatable;
3542 asymbol **symbols;
3543 {
3544 Elf_Internal_Shdr *symtab_hdr;
3545 asection *input_section = link_order->u.indirect.section;
3546 bfd *input_bfd = input_section->owner;
3547 asection **sections = NULL;
3548 Elf_Internal_Rela *internal_relocs = NULL;
3549 Elf_Internal_Sym *isymbuf = NULL;
3550
3551 /* We only need to handle the case of relaxing, or of having a
3552 particular set of section contents, specially. */
3553 if (relocatable
3554 || elf_section_data (input_section)->this_hdr.contents == NULL)
3555 return bfd_generic_get_relocated_section_contents (output_bfd, link_info,
3556 link_order, data,
3557 relocatable,
3558 symbols);
3559
3560 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3561
3562 memcpy (data, elf_section_data (input_section)->this_hdr.contents,
3563 (size_t) input_section->size);
3564
3565 if ((input_section->flags & SEC_RELOC) != 0
3566 && input_section->reloc_count > 0)
3567 {
3568 asection **secpp;
3569 Elf_Internal_Sym *isym, *isymend;
3570 bfd_size_type amt;
3571
3572 internal_relocs = (_bfd_elf_link_read_relocs
3573 (input_bfd, input_section, (PTR) NULL,
3574 (Elf_Internal_Rela *) NULL, FALSE));
3575 if (internal_relocs == NULL)
3576 goto error_return;
3577
3578 if (symtab_hdr->sh_info != 0)
3579 {
3580 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
3581 if (isymbuf == NULL)
3582 isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
3583 symtab_hdr->sh_info, 0,
3584 NULL, NULL, NULL);
3585 if (isymbuf == NULL)
3586 goto error_return;
3587 }
3588
3589 amt = symtab_hdr->sh_info;
3590 amt *= sizeof (asection *);
3591 sections = (asection **) bfd_malloc (amt);
3592 if (sections == NULL && amt != 0)
3593 goto error_return;
3594
3595 isymend = isymbuf + symtab_hdr->sh_info;
3596 for (isym = isymbuf, secpp = sections; isym < isymend; ++isym, ++secpp)
3597 {
3598 asection *isec;
3599
3600 if (isym->st_shndx == SHN_UNDEF)
3601 isec = bfd_und_section_ptr;
3602 else if (isym->st_shndx == SHN_ABS)
3603 isec = bfd_abs_section_ptr;
3604 else if (isym->st_shndx == SHN_COMMON)
3605 isec = bfd_com_section_ptr;
3606 else
3607 isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx);
3608
3609 *secpp = isec;
3610 }
3611
3612 if (! mn10300_elf_relocate_section (output_bfd, link_info, input_bfd,
3613 input_section, data, internal_relocs,
3614 isymbuf, sections))
3615 goto error_return;
3616
3617 if (sections != NULL)
3618 free (sections);
3619 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
3620 free (isymbuf);
3621 if (internal_relocs != elf_section_data (input_section)->relocs)
3622 free (internal_relocs);
3623 }
3624
3625 return data;
3626
3627 error_return:
3628 if (sections != NULL)
3629 free (sections);
3630 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
3631 free (isymbuf);
3632 if (internal_relocs != NULL
3633 && internal_relocs != elf_section_data (input_section)->relocs)
3634 free (internal_relocs);
3635 return NULL;
3636 }
3637
3638 /* Assorted hash table functions. */
3639
3640 /* Initialize an entry in the link hash table. */
3641
3642 /* Create an entry in an MN10300 ELF linker hash table. */
3643
3644 static struct bfd_hash_entry *
3645 elf32_mn10300_link_hash_newfunc (entry, table, string)
3646 struct bfd_hash_entry *entry;
3647 struct bfd_hash_table *table;
3648 const char *string;
3649 {
3650 struct elf32_mn10300_link_hash_entry *ret =
3651 (struct elf32_mn10300_link_hash_entry *) entry;
3652
3653 /* Allocate the structure if it has not already been allocated by a
3654 subclass. */
3655 if (ret == (struct elf32_mn10300_link_hash_entry *) NULL)
3656 ret = ((struct elf32_mn10300_link_hash_entry *)
3657 bfd_hash_allocate (table,
3658 sizeof (struct elf32_mn10300_link_hash_entry)));
3659 if (ret == (struct elf32_mn10300_link_hash_entry *) NULL)
3660 return (struct bfd_hash_entry *) ret;
3661
3662 /* Call the allocation method of the superclass. */
3663 ret = ((struct elf32_mn10300_link_hash_entry *)
3664 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
3665 table, string));
3666 if (ret != (struct elf32_mn10300_link_hash_entry *) NULL)
3667 {
3668 ret->direct_calls = 0;
3669 ret->stack_size = 0;
3670 ret->movm_args = 0;
3671 ret->movm_stack_size = 0;
3672 ret->flags = 0;
3673 }
3674
3675 return (struct bfd_hash_entry *) ret;
3676 }
3677
3678 /* Create an mn10300 ELF linker hash table. */
3679
3680 static struct bfd_link_hash_table *
3681 elf32_mn10300_link_hash_table_create (abfd)
3682 bfd *abfd;
3683 {
3684 struct elf32_mn10300_link_hash_table *ret;
3685 bfd_size_type amt = sizeof (struct elf32_mn10300_link_hash_table);
3686
3687 ret = (struct elf32_mn10300_link_hash_table *) bfd_malloc (amt);
3688 if (ret == (struct elf32_mn10300_link_hash_table *) NULL)
3689 return NULL;
3690
3691 if (! _bfd_elf_link_hash_table_init (&ret->root, abfd,
3692 elf32_mn10300_link_hash_newfunc))
3693 {
3694 free (ret);
3695 return NULL;
3696 }
3697
3698 ret->flags = 0;
3699 amt = sizeof (struct elf_link_hash_table);
3700 ret->static_hash_table
3701 = (struct elf32_mn10300_link_hash_table *) bfd_malloc (amt);
3702 if (ret->static_hash_table == NULL)
3703 {
3704 free (ret);
3705 return NULL;
3706 }
3707
3708 if (! _bfd_elf_link_hash_table_init (&ret->static_hash_table->root, abfd,
3709 elf32_mn10300_link_hash_newfunc))
3710 {
3711 free (ret->static_hash_table);
3712 free (ret);
3713 return NULL;
3714 }
3715 return &ret->root.root;
3716 }
3717
3718 /* Free an mn10300 ELF linker hash table. */
3719
3720 static void
3721 elf32_mn10300_link_hash_table_free (hash)
3722 struct bfd_link_hash_table *hash;
3723 {
3724 struct elf32_mn10300_link_hash_table *ret
3725 = (struct elf32_mn10300_link_hash_table *) hash;
3726
3727 _bfd_generic_link_hash_table_free
3728 ((struct bfd_link_hash_table *) ret->static_hash_table);
3729 _bfd_generic_link_hash_table_free
3730 ((struct bfd_link_hash_table *) ret);
3731 }
3732
3733 static unsigned long
3734 elf_mn10300_mach (flags)
3735 flagword flags;
3736 {
3737 switch (flags & EF_MN10300_MACH)
3738 {
3739 case E_MN10300_MACH_MN10300:
3740 default:
3741 return bfd_mach_mn10300;
3742
3743 case E_MN10300_MACH_AM33:
3744 return bfd_mach_am33;
3745
3746 case E_MN10300_MACH_AM33_2:
3747 return bfd_mach_am33_2;
3748 }
3749 }
3750
3751 /* The final processing done just before writing out a MN10300 ELF object
3752 file. This gets the MN10300 architecture right based on the machine
3753 number. */
3754
3755 void
3756 _bfd_mn10300_elf_final_write_processing (abfd, linker)
3757 bfd *abfd;
3758 bfd_boolean linker ATTRIBUTE_UNUSED;
3759 {
3760 unsigned long val;
3761
3762 switch (bfd_get_mach (abfd))
3763 {
3764 default:
3765 case bfd_mach_mn10300:
3766 val = E_MN10300_MACH_MN10300;
3767 break;
3768
3769 case bfd_mach_am33:
3770 val = E_MN10300_MACH_AM33;
3771 break;
3772
3773 case bfd_mach_am33_2:
3774 val = E_MN10300_MACH_AM33_2;
3775 break;
3776 }
3777
3778 elf_elfheader (abfd)->e_flags &= ~ (EF_MN10300_MACH);
3779 elf_elfheader (abfd)->e_flags |= val;
3780 }
3781
3782 bfd_boolean
3783 _bfd_mn10300_elf_object_p (abfd)
3784 bfd *abfd;
3785 {
3786 bfd_default_set_arch_mach (abfd, bfd_arch_mn10300,
3787 elf_mn10300_mach (elf_elfheader (abfd)->e_flags));
3788 return TRUE;
3789 }
3790
3791 /* Merge backend specific data from an object file to the output
3792 object file when linking. */
3793
3794 bfd_boolean
3795 _bfd_mn10300_elf_merge_private_bfd_data (ibfd, obfd)
3796 bfd *ibfd;
3797 bfd *obfd;
3798 {
3799 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3800 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3801 return TRUE;
3802
3803 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
3804 && bfd_get_mach (obfd) < bfd_get_mach (ibfd))
3805 {
3806 if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd),
3807 bfd_get_mach (ibfd)))
3808 return FALSE;
3809 }
3810
3811 return TRUE;
3812 }
3813
3814 #define PLT0_ENTRY_SIZE 15
3815 #define PLT_ENTRY_SIZE 20
3816 #define PIC_PLT_ENTRY_SIZE 24
3817
3818 static const bfd_byte elf_mn10300_plt0_entry[PLT0_ENTRY_SIZE] =
3819 {
3820 0xfc, 0xa0, 0, 0, 0, 0, /* mov (.got+8),a0 */
3821 0xfe, 0xe, 0x10, 0, 0, 0, 0, /* mov (.got+4),r1 */
3822 0xf0, 0xf4, /* jmp (a0) */
3823 };
3824
3825 static const bfd_byte elf_mn10300_plt_entry[PLT_ENTRY_SIZE] =
3826 {
3827 0xfc, 0xa0, 0, 0, 0, 0, /* mov (nameN@GOT + .got),a0 */
3828 0xf0, 0xf4, /* jmp (a0) */
3829 0xfe, 8, 0, 0, 0, 0, 0, /* mov reloc-table-address,r0 */
3830 0xdc, 0, 0, 0, 0, /* jmp .plt0 */
3831 };
3832
3833 static const bfd_byte elf_mn10300_pic_plt_entry[PIC_PLT_ENTRY_SIZE] =
3834 {
3835 0xfc, 0x22, 0, 0, 0, 0, /* mov (nameN@GOT,a2),a0 */
3836 0xf0, 0xf4, /* jmp (a0) */
3837 0xfe, 8, 0, 0, 0, 0, 0, /* mov reloc-table-address,r0 */
3838 0xf8, 0x22, 8, /* mov (8,a2),a0 */
3839 0xfb, 0xa, 0x1a, 4, /* mov (4,a2),r1 */
3840 0xf0, 0xf4, /* jmp (a0) */
3841 };
3842
3843 /* Return size of the first PLT entry. */
3844 #define elf_mn10300_sizeof_plt0(info) \
3845 (info->shared ? PIC_PLT_ENTRY_SIZE : PLT0_ENTRY_SIZE)
3846
3847 /* Return size of a PLT entry. */
3848 #define elf_mn10300_sizeof_plt(info) \
3849 (info->shared ? PIC_PLT_ENTRY_SIZE : PLT_ENTRY_SIZE)
3850
3851 /* Return offset of the PLT0 address in an absolute PLT entry. */
3852 #define elf_mn10300_plt_plt0_offset(info) 16
3853
3854 /* Return offset of the linker in PLT0 entry. */
3855 #define elf_mn10300_plt0_linker_offset(info) 2
3856
3857 /* Return offset of the GOT id in PLT0 entry. */
3858 #define elf_mn10300_plt0_gotid_offset(info) 9
3859
3860 /* Return offset of the temporary in PLT entry */
3861 #define elf_mn10300_plt_temp_offset(info) 8
3862
3863 /* Return offset of the symbol in PLT entry. */
3864 #define elf_mn10300_plt_symbol_offset(info) 2
3865
3866 /* Return offset of the relocation in PLT entry. */
3867 #define elf_mn10300_plt_reloc_offset(info) 11
3868
3869 /* The name of the dynamic interpreter. This is put in the .interp
3870 section. */
3871
3872 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
3873
3874 /* Create dynamic sections when linking against a dynamic object. */
3875
3876 static bfd_boolean
3877 _bfd_mn10300_elf_create_dynamic_sections (abfd, info)
3878 bfd *abfd;
3879 struct bfd_link_info *info;
3880 {
3881 flagword flags;
3882 asection * s;
3883 const struct elf_backend_data * bed = get_elf_backend_data (abfd);
3884 int ptralign = 0;
3885
3886 switch (bed->s->arch_size)
3887 {
3888 case 32:
3889 ptralign = 2;
3890 break;
3891
3892 case 64:
3893 ptralign = 3;
3894 break;
3895
3896 default:
3897 bfd_set_error (bfd_error_bad_value);
3898 return FALSE;
3899 }
3900
3901 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
3902 .rel[a].bss sections. */
3903
3904 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3905 | SEC_LINKER_CREATED);
3906
3907 s = bfd_make_section_with_flags (abfd,
3908 (bed->default_use_rela_p
3909 ? ".rela.plt" : ".rel.plt"),
3910 flags | SEC_READONLY);
3911 if (s == NULL
3912 || ! bfd_set_section_alignment (abfd, s, ptralign))
3913 return FALSE;
3914
3915 if (! _bfd_mn10300_elf_create_got_section (abfd, info))
3916 return FALSE;
3917
3918 {
3919 const char * secname;
3920 char * relname;
3921 flagword secflags;
3922 asection * sec;
3923
3924 for (sec = abfd->sections; sec; sec = sec->next)
3925 {
3926 secflags = bfd_get_section_flags (abfd, sec);
3927 if ((secflags & (SEC_DATA | SEC_LINKER_CREATED))
3928 || ((secflags & SEC_HAS_CONTENTS) != SEC_HAS_CONTENTS))
3929 continue;
3930
3931 secname = bfd_get_section_name (abfd, sec);
3932 relname = (char *) bfd_malloc (strlen (secname) + 6);
3933 strcpy (relname, ".rela");
3934 strcat (relname, secname);
3935
3936 s = bfd_make_section_with_flags (abfd, relname,
3937 flags | SEC_READONLY);
3938 if (s == NULL
3939 || ! bfd_set_section_alignment (abfd, s, ptralign))
3940 return FALSE;
3941 }
3942 }
3943
3944 if (bed->want_dynbss)
3945 {
3946 /* The .dynbss section is a place to put symbols which are defined
3947 by dynamic objects, are referenced by regular objects, and are
3948 not functions. We must allocate space for them in the process
3949 image and use a R_*_COPY reloc to tell the dynamic linker to
3950 initialize them at run time. The linker script puts the .dynbss
3951 section into the .bss section of the final image. */
3952 s = bfd_make_section_with_flags (abfd, ".dynbss",
3953 SEC_ALLOC | SEC_LINKER_CREATED);
3954 if (s == NULL)
3955 return FALSE;
3956
3957 /* The .rel[a].bss section holds copy relocs. This section is not
3958 normally needed. We need to create it here, though, so that the
3959 linker will map it to an output section. We can't just create it
3960 only if we need it, because we will not know whether we need it
3961 until we have seen all the input files, and the first time the
3962 main linker code calls BFD after examining all the input files
3963 (size_dynamic_sections) the input sections have already been
3964 mapped to the output sections. If the section turns out not to
3965 be needed, we can discard it later. We will never need this
3966 section when generating a shared object, since they do not use
3967 copy relocs. */
3968 if (! info->shared)
3969 {
3970 s = bfd_make_section_with_flags (abfd,
3971 (bed->default_use_rela_p
3972 ? ".rela.bss" : ".rel.bss"),
3973 flags | SEC_READONLY);
3974 if (s == NULL
3975 || ! bfd_set_section_alignment (abfd, s, ptralign))
3976 return FALSE;
3977 }
3978 }
3979
3980 return TRUE;
3981 }
3982 \f
3983 /* Adjust a symbol defined by a dynamic object and referenced by a
3984 regular object. The current definition is in some section of the
3985 dynamic object, but we're not including those sections. We have to
3986 change the definition to something the rest of the link can
3987 understand. */
3988
3989 static bfd_boolean
3990 _bfd_mn10300_elf_adjust_dynamic_symbol (info, h)
3991 struct bfd_link_info * info;
3992 struct elf_link_hash_entry * h;
3993 {
3994 bfd * dynobj;
3995 asection * s;
3996 unsigned int power_of_two;
3997
3998 dynobj = elf_hash_table (info)->dynobj;
3999
4000 /* Make sure we know what is going on here. */
4001 BFD_ASSERT (dynobj != NULL
4002 && (h->needs_plt
4003 || h->u.weakdef != NULL
4004 || (h->def_dynamic
4005 && h->ref_regular
4006 && !h->def_regular)));
4007
4008 /* If this is a function, put it in the procedure linkage table. We
4009 will fill in the contents of the procedure linkage table later,
4010 when we know the address of the .got section. */
4011 if (h->type == STT_FUNC
4012 || h->needs_plt)
4013 {
4014 if (! info->shared
4015 && !h->def_dynamic
4016 && !h->ref_dynamic)
4017 {
4018 /* This case can occur if we saw a PLT reloc in an input
4019 file, but the symbol was never referred to by a dynamic
4020 object. In such a case, we don't actually need to build
4021 a procedure linkage table, and we can just do a REL32
4022 reloc instead. */
4023 BFD_ASSERT (h->needs_plt);
4024 return TRUE;
4025 }
4026
4027 /* Make sure this symbol is output as a dynamic symbol. */
4028 if (h->dynindx == -1)
4029 {
4030 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4031 return FALSE;
4032 }
4033
4034 s = bfd_get_section_by_name (dynobj, ".plt");
4035 BFD_ASSERT (s != NULL);
4036
4037 /* If this is the first .plt entry, make room for the special
4038 first entry. */
4039 if (s->size == 0)
4040 s->size += elf_mn10300_sizeof_plt0 (info);
4041
4042 /* If this symbol is not defined in a regular file, and we are
4043 not generating a shared library, then set the symbol to this
4044 location in the .plt. This is required to make function
4045 pointers compare as equal between the normal executable and
4046 the shared library. */
4047 if (! info->shared
4048 && !h->def_regular)
4049 {
4050 h->root.u.def.section = s;
4051 h->root.u.def.value = s->size;
4052 }
4053
4054 h->plt.offset = s->size;
4055
4056 /* Make room for this entry. */
4057 s->size += elf_mn10300_sizeof_plt (info);
4058
4059 /* We also need to make an entry in the .got.plt section, which
4060 will be placed in the .got section by the linker script. */
4061
4062 s = bfd_get_section_by_name (dynobj, ".got.plt");
4063 BFD_ASSERT (s != NULL);
4064 s->size += 4;
4065
4066 /* We also need to make an entry in the .rela.plt section. */
4067
4068 s = bfd_get_section_by_name (dynobj, ".rela.plt");
4069 BFD_ASSERT (s != NULL);
4070 s->size += sizeof (Elf32_External_Rela);
4071
4072 return TRUE;
4073 }
4074
4075 /* If this is a weak symbol, and there is a real definition, the
4076 processor independent code will have arranged for us to see the
4077 real definition first, and we can just use the same value. */
4078 if (h->u.weakdef != NULL)
4079 {
4080 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4081 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4082 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4083 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4084 return TRUE;
4085 }
4086
4087 /* This is a reference to a symbol defined by a dynamic object which
4088 is not a function. */
4089
4090 /* If we are creating a shared library, we must presume that the
4091 only references to the symbol are via the global offset table.
4092 For such cases we need not do anything here; the relocations will
4093 be handled correctly by relocate_section. */
4094 if (info->shared)
4095 return TRUE;
4096
4097 /* If there are no references to this symbol that do not use the
4098 GOT, we don't need to generate a copy reloc. */
4099 if (!h->non_got_ref)
4100 return TRUE;
4101
4102 if (h->size == 0)
4103 {
4104 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
4105 h->root.root.string);
4106 return TRUE;
4107 }
4108
4109 /* We must allocate the symbol in our .dynbss section, which will
4110 become part of the .bss section of the executable. There will be
4111 an entry for this symbol in the .dynsym section. The dynamic
4112 object will contain position independent code, so all references
4113 from the dynamic object to this symbol will go through the global
4114 offset table. The dynamic linker will use the .dynsym entry to
4115 determine the address it must put in the global offset table, so
4116 both the dynamic object and the regular object will refer to the
4117 same memory location for the variable. */
4118
4119 s = bfd_get_section_by_name (dynobj, ".dynbss");
4120 BFD_ASSERT (s != NULL);
4121
4122 /* We must generate a R_MN10300_COPY reloc to tell the dynamic linker to
4123 copy the initial value out of the dynamic object and into the
4124 runtime process image. We need to remember the offset into the
4125 .rela.bss section we are going to use. */
4126 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4127 {
4128 asection * srel;
4129
4130 srel = bfd_get_section_by_name (dynobj, ".rela.bss");
4131 BFD_ASSERT (srel != NULL);
4132 srel->size += sizeof (Elf32_External_Rela);
4133 h->needs_copy = 1;
4134 }
4135
4136 /* We need to figure out the alignment required for this symbol. I
4137 have no idea how ELF linkers handle this. */
4138 power_of_two = bfd_log2 (h->size);
4139 if (power_of_two > 3)
4140 power_of_two = 3;
4141
4142 /* Apply the required alignment. */
4143 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
4144 if (power_of_two > bfd_get_section_alignment (dynobj, s))
4145 {
4146 if (! bfd_set_section_alignment (dynobj, s, power_of_two))
4147 return FALSE;
4148 }
4149
4150 /* Define the symbol as being at this point in the section. */
4151 h->root.u.def.section = s;
4152 h->root.u.def.value = s->size;
4153
4154 /* Increment the section size to make room for the symbol. */
4155 s->size += h->size;
4156
4157 return TRUE;
4158 }
4159
4160 /* Set the sizes of the dynamic sections. */
4161
4162 static bfd_boolean
4163 _bfd_mn10300_elf_size_dynamic_sections (output_bfd, info)
4164 bfd * output_bfd;
4165 struct bfd_link_info * info;
4166 {
4167 bfd * dynobj;
4168 asection * s;
4169 bfd_boolean plt;
4170 bfd_boolean relocs;
4171 bfd_boolean reltext;
4172
4173 dynobj = elf_hash_table (info)->dynobj;
4174 BFD_ASSERT (dynobj != NULL);
4175
4176 if (elf_hash_table (info)->dynamic_sections_created)
4177 {
4178 /* Set the contents of the .interp section to the interpreter. */
4179 if (info->executable)
4180 {
4181 s = bfd_get_section_by_name (dynobj, ".interp");
4182 BFD_ASSERT (s != NULL);
4183 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4184 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
4185 }
4186 }
4187 else
4188 {
4189 /* We may have created entries in the .rela.got section.
4190 However, if we are not creating the dynamic sections, we will
4191 not actually use these entries. Reset the size of .rela.got,
4192 which will cause it to get stripped from the output file
4193 below. */
4194 s = bfd_get_section_by_name (dynobj, ".rela.got");
4195 if (s != NULL)
4196 s->size = 0;
4197 }
4198
4199 /* The check_relocs and adjust_dynamic_symbol entry points have
4200 determined the sizes of the various dynamic sections. Allocate
4201 memory for them. */
4202 plt = FALSE;
4203 relocs = FALSE;
4204 reltext = FALSE;
4205 for (s = dynobj->sections; s != NULL; s = s->next)
4206 {
4207 const char * name;
4208
4209 if ((s->flags & SEC_LINKER_CREATED) == 0)
4210 continue;
4211
4212 /* It's OK to base decisions on the section name, because none
4213 of the dynobj section names depend upon the input files. */
4214 name = bfd_get_section_name (dynobj, s);
4215
4216 if (strcmp (name, ".plt") == 0)
4217 {
4218 /* Remember whether there is a PLT. */
4219 plt = s->size != 0;
4220 }
4221 else if (strncmp (name, ".rela", 5) == 0)
4222 {
4223 if (s->size != 0)
4224 {
4225 asection * target;
4226
4227 /* Remember whether there are any reloc sections other
4228 than .rela.plt. */
4229 if (strcmp (name, ".rela.plt") != 0)
4230 {
4231 const char * outname;
4232
4233 relocs = TRUE;
4234
4235 /* If this relocation section applies to a read only
4236 section, then we probably need a DT_TEXTREL
4237 entry. The entries in the .rela.plt section
4238 really apply to the .got section, which we
4239 created ourselves and so know is not readonly. */
4240 outname = bfd_get_section_name (output_bfd,
4241 s->output_section);
4242 target = bfd_get_section_by_name (output_bfd, outname + 5);
4243 if (target != NULL
4244 && (target->flags & SEC_READONLY) != 0
4245 && (target->flags & SEC_ALLOC) != 0)
4246 reltext = TRUE;
4247 }
4248
4249 /* We use the reloc_count field as a counter if we need
4250 to copy relocs into the output file. */
4251 s->reloc_count = 0;
4252 }
4253 }
4254 else if (strncmp (name, ".got", 4) != 0
4255 && strcmp (name, ".dynbss") != 0)
4256 /* It's not one of our sections, so don't allocate space. */
4257 continue;
4258
4259 if (s->size == 0)
4260 {
4261 /* If we don't need this section, strip it from the
4262 output file. This is mostly to handle .rela.bss and
4263 .rela.plt. We must create both sections in
4264 create_dynamic_sections, because they must be created
4265 before the linker maps input sections to output
4266 sections. The linker does that before
4267 adjust_dynamic_symbol is called, and it is that
4268 function which decides whether anything needs to go
4269 into these sections. */
4270 s->flags |= SEC_EXCLUDE;
4271 continue;
4272 }
4273
4274 if ((s->flags & SEC_HAS_CONTENTS) == 0)
4275 continue;
4276
4277 /* Allocate memory for the section contents. We use bfd_zalloc
4278 here in case unused entries are not reclaimed before the
4279 section's contents are written out. This should not happen,
4280 but this way if it does, we get a R_MN10300_NONE reloc
4281 instead of garbage. */
4282 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
4283 if (s->contents == NULL)
4284 return FALSE;
4285 }
4286
4287 if (elf_hash_table (info)->dynamic_sections_created)
4288 {
4289 /* Add some entries to the .dynamic section. We fill in the
4290 values later, in _bfd_mn10300_elf_finish_dynamic_sections,
4291 but we must add the entries now so that we get the correct
4292 size for the .dynamic section. The DT_DEBUG entry is filled
4293 in by the dynamic linker and used by the debugger. */
4294 if (! info->shared)
4295 {
4296 if (!_bfd_elf_add_dynamic_entry (info, DT_DEBUG, 0))
4297 return FALSE;
4298 }
4299
4300 if (plt)
4301 {
4302 if (!_bfd_elf_add_dynamic_entry (info, DT_PLTGOT, 0)
4303 || !_bfd_elf_add_dynamic_entry (info, DT_PLTRELSZ, 0)
4304 || !_bfd_elf_add_dynamic_entry (info, DT_PLTREL, DT_RELA)
4305 || !_bfd_elf_add_dynamic_entry (info, DT_JMPREL, 0))
4306 return FALSE;
4307 }
4308
4309 if (relocs)
4310 {
4311 if (!_bfd_elf_add_dynamic_entry (info, DT_RELA, 0)
4312 || !_bfd_elf_add_dynamic_entry (info, DT_RELASZ, 0)
4313 || !_bfd_elf_add_dynamic_entry (info, DT_RELAENT,
4314 sizeof (Elf32_External_Rela)))
4315 return FALSE;
4316 }
4317
4318 if (reltext)
4319 {
4320 if (!_bfd_elf_add_dynamic_entry (info, DT_TEXTREL, 0))
4321 return FALSE;
4322 }
4323 }
4324
4325 return TRUE;
4326 }
4327
4328 /* Finish up dynamic symbol handling. We set the contents of various
4329 dynamic sections here. */
4330
4331 static bfd_boolean
4332 _bfd_mn10300_elf_finish_dynamic_symbol (output_bfd, info, h, sym)
4333 bfd * output_bfd;
4334 struct bfd_link_info * info;
4335 struct elf_link_hash_entry * h;
4336 Elf_Internal_Sym * sym;
4337 {
4338 bfd * dynobj;
4339
4340 dynobj = elf_hash_table (info)->dynobj;
4341
4342 if (h->plt.offset != (bfd_vma) -1)
4343 {
4344 asection * splt;
4345 asection * sgot;
4346 asection * srel;
4347 bfd_vma plt_index;
4348 bfd_vma got_offset;
4349 Elf_Internal_Rela rel;
4350
4351 /* This symbol has an entry in the procedure linkage table. Set
4352 it up. */
4353
4354 BFD_ASSERT (h->dynindx != -1);
4355
4356 splt = bfd_get_section_by_name (dynobj, ".plt");
4357 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
4358 srel = bfd_get_section_by_name (dynobj, ".rela.plt");
4359 BFD_ASSERT (splt != NULL && sgot != NULL && srel != NULL);
4360
4361 /* Get the index in the procedure linkage table which
4362 corresponds to this symbol. This is the index of this symbol
4363 in all the symbols for which we are making plt entries. The
4364 first entry in the procedure linkage table is reserved. */
4365 plt_index = ((h->plt.offset - elf_mn10300_sizeof_plt0 (info))
4366 / elf_mn10300_sizeof_plt (info));
4367
4368 /* Get the offset into the .got table of the entry that
4369 corresponds to this function. Each .got entry is 4 bytes.
4370 The first three are reserved. */
4371 got_offset = (plt_index + 3) * 4;
4372
4373 /* Fill in the entry in the procedure linkage table. */
4374 if (! info->shared)
4375 {
4376 memcpy (splt->contents + h->plt.offset, elf_mn10300_plt_entry,
4377 elf_mn10300_sizeof_plt (info));
4378 bfd_put_32 (output_bfd,
4379 (sgot->output_section->vma
4380 + sgot->output_offset
4381 + got_offset),
4382 (splt->contents + h->plt.offset
4383 + elf_mn10300_plt_symbol_offset (info)));
4384
4385 bfd_put_32 (output_bfd,
4386 (1 - h->plt.offset - elf_mn10300_plt_plt0_offset (info)),
4387 (splt->contents + h->plt.offset
4388 + elf_mn10300_plt_plt0_offset (info)));
4389 }
4390 else
4391 {
4392 memcpy (splt->contents + h->plt.offset, elf_mn10300_pic_plt_entry,
4393 elf_mn10300_sizeof_plt (info));
4394
4395 bfd_put_32 (output_bfd, got_offset,
4396 (splt->contents + h->plt.offset
4397 + elf_mn10300_plt_symbol_offset (info)));
4398 }
4399
4400 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
4401 (splt->contents + h->plt.offset
4402 + elf_mn10300_plt_reloc_offset (info)));
4403
4404 /* Fill in the entry in the global offset table. */
4405 bfd_put_32 (output_bfd,
4406 (splt->output_section->vma
4407 + splt->output_offset
4408 + h->plt.offset
4409 + elf_mn10300_plt_temp_offset (info)),
4410 sgot->contents + got_offset);
4411
4412 /* Fill in the entry in the .rela.plt section. */
4413 rel.r_offset = (sgot->output_section->vma
4414 + sgot->output_offset
4415 + got_offset);
4416 rel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_JMP_SLOT);
4417 rel.r_addend = 0;
4418 bfd_elf32_swap_reloca_out (output_bfd, &rel,
4419 (bfd_byte *) ((Elf32_External_Rela *) srel->contents
4420 + plt_index));
4421
4422 if (!h->def_regular)
4423 /* Mark the symbol as undefined, rather than as defined in
4424 the .plt section. Leave the value alone. */
4425 sym->st_shndx = SHN_UNDEF;
4426 }
4427
4428 if (h->got.offset != (bfd_vma) -1)
4429 {
4430 asection * sgot;
4431 asection * srel;
4432 Elf_Internal_Rela rel;
4433
4434 /* This symbol has an entry in the global offset table. Set it up. */
4435
4436 sgot = bfd_get_section_by_name (dynobj, ".got");
4437 srel = bfd_get_section_by_name (dynobj, ".rela.got");
4438 BFD_ASSERT (sgot != NULL && srel != NULL);
4439
4440 rel.r_offset = (sgot->output_section->vma
4441 + sgot->output_offset
4442 + (h->got.offset &~ 1));
4443
4444 /* If this is a -Bsymbolic link, and the symbol is defined
4445 locally, we just want to emit a RELATIVE reloc. Likewise if
4446 the symbol was forced to be local because of a version file.
4447 The entry in the global offset table will already have been
4448 initialized in the relocate_section function. */
4449 if (info->shared
4450 && (info->symbolic || h->dynindx == -1)
4451 && h->def_regular)
4452 {
4453 rel.r_info = ELF32_R_INFO (0, R_MN10300_RELATIVE);
4454 rel.r_addend = (h->root.u.def.value
4455 + h->root.u.def.section->output_section->vma
4456 + h->root.u.def.section->output_offset);
4457 }
4458 else
4459 {
4460 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
4461 rel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_GLOB_DAT);
4462 rel.r_addend = 0;
4463 }
4464
4465 bfd_elf32_swap_reloca_out (output_bfd, &rel,
4466 (bfd_byte *) ((Elf32_External_Rela *) srel->contents
4467 + srel->reloc_count));
4468 ++ srel->reloc_count;
4469 }
4470
4471 if (h->needs_copy)
4472 {
4473 asection * s;
4474 Elf_Internal_Rela rel;
4475
4476 /* This symbol needs a copy reloc. Set it up. */
4477 BFD_ASSERT (h->dynindx != -1
4478 && (h->root.type == bfd_link_hash_defined
4479 || h->root.type == bfd_link_hash_defweak));
4480
4481 s = bfd_get_section_by_name (h->root.u.def.section->owner,
4482 ".rela.bss");
4483 BFD_ASSERT (s != NULL);
4484
4485 rel.r_offset = (h->root.u.def.value
4486 + h->root.u.def.section->output_section->vma
4487 + h->root.u.def.section->output_offset);
4488 rel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_COPY);
4489 rel.r_addend = 0;
4490 bfd_elf32_swap_reloca_out (output_bfd, &rel,
4491 (bfd_byte *) ((Elf32_External_Rela *) s->contents
4492 + s->reloc_count));
4493 ++ s->reloc_count;
4494 }
4495
4496 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
4497 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
4498 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
4499 sym->st_shndx = SHN_ABS;
4500
4501 return TRUE;
4502 }
4503
4504 /* Finish up the dynamic sections. */
4505
4506 static bfd_boolean
4507 _bfd_mn10300_elf_finish_dynamic_sections (output_bfd, info)
4508 bfd * output_bfd;
4509 struct bfd_link_info * info;
4510 {
4511 bfd * dynobj;
4512 asection * sgot;
4513 asection * sdyn;
4514
4515 dynobj = elf_hash_table (info)->dynobj;
4516
4517 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
4518 BFD_ASSERT (sgot != NULL);
4519 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
4520
4521 if (elf_hash_table (info)->dynamic_sections_created)
4522 {
4523 asection * splt;
4524 Elf32_External_Dyn * dyncon;
4525 Elf32_External_Dyn * dynconend;
4526
4527 BFD_ASSERT (sdyn != NULL);
4528
4529 dyncon = (Elf32_External_Dyn *) sdyn->contents;
4530 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
4531
4532 for (; dyncon < dynconend; dyncon++)
4533 {
4534 Elf_Internal_Dyn dyn;
4535 const char * name;
4536 asection * s;
4537
4538 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4539
4540 switch (dyn.d_tag)
4541 {
4542 default:
4543 break;
4544
4545 case DT_PLTGOT:
4546 name = ".got";
4547 goto get_vma;
4548
4549 case DT_JMPREL:
4550 name = ".rela.plt";
4551 get_vma:
4552 s = bfd_get_section_by_name (output_bfd, name);
4553 BFD_ASSERT (s != NULL);
4554 dyn.d_un.d_ptr = s->vma;
4555 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4556 break;
4557
4558 case DT_PLTRELSZ:
4559 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
4560 BFD_ASSERT (s != NULL);
4561 dyn.d_un.d_val = s->size;
4562 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4563 break;
4564
4565 case DT_RELASZ:
4566 /* My reading of the SVR4 ABI indicates that the
4567 procedure linkage table relocs (DT_JMPREL) should be
4568 included in the overall relocs (DT_RELA). This is
4569 what Solaris does. However, UnixWare can not handle
4570 that case. Therefore, we override the DT_RELASZ entry
4571 here to make it not include the JMPREL relocs. Since
4572 the linker script arranges for .rela.plt to follow all
4573 other relocation sections, we don't have to worry
4574 about changing the DT_RELA entry. */
4575 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
4576 if (s != NULL)
4577 dyn.d_un.d_val -= s->size;
4578 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4579 break;
4580 }
4581 }
4582
4583 /* Fill in the first entry in the procedure linkage table. */
4584 splt = bfd_get_section_by_name (dynobj, ".plt");
4585 if (splt && splt->size > 0)
4586 {
4587 if (info->shared)
4588 {
4589 memcpy (splt->contents, elf_mn10300_pic_plt_entry,
4590 elf_mn10300_sizeof_plt (info));
4591 }
4592 else
4593 {
4594 memcpy (splt->contents, elf_mn10300_plt0_entry, PLT0_ENTRY_SIZE);
4595 bfd_put_32 (output_bfd,
4596 sgot->output_section->vma + sgot->output_offset + 4,
4597 splt->contents + elf_mn10300_plt0_gotid_offset (info));
4598 bfd_put_32 (output_bfd,
4599 sgot->output_section->vma + sgot->output_offset + 8,
4600 splt->contents + elf_mn10300_plt0_linker_offset (info));
4601 }
4602
4603 /* UnixWare sets the entsize of .plt to 4, although that doesn't
4604 really seem like the right value. */
4605 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
4606 }
4607 }
4608
4609 /* Fill in the first three entries in the global offset table. */
4610 if (sgot->size > 0)
4611 {
4612 if (sdyn == NULL)
4613 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
4614 else
4615 bfd_put_32 (output_bfd,
4616 sdyn->output_section->vma + sdyn->output_offset,
4617 sgot->contents);
4618 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
4619 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
4620 }
4621
4622 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
4623
4624 return TRUE;
4625 }
4626
4627 /* Classify relocation types, such that combreloc can sort them
4628 properly. */
4629
4630 static enum elf_reloc_type_class
4631 _bfd_mn10300_elf_reloc_type_class (const Elf_Internal_Rela *rela)
4632 {
4633 switch ((int) ELF32_R_TYPE (rela->r_info))
4634 {
4635 case R_MN10300_RELATIVE:
4636 return reloc_class_relative;
4637 case R_MN10300_JMP_SLOT:
4638 return reloc_class_plt;
4639 case R_MN10300_COPY:
4640 return reloc_class_copy;
4641 default:
4642 return reloc_class_normal;
4643 }
4644 }
4645
4646 #ifndef ELF_ARCH
4647 #define TARGET_LITTLE_SYM bfd_elf32_mn10300_vec
4648 #define TARGET_LITTLE_NAME "elf32-mn10300"
4649 #define ELF_ARCH bfd_arch_mn10300
4650 #define ELF_MACHINE_CODE EM_MN10300
4651 #define ELF_MACHINE_ALT1 EM_CYGNUS_MN10300
4652 #define ELF_MAXPAGESIZE 0x1000
4653 #endif
4654
4655 #define elf_info_to_howto mn10300_info_to_howto
4656 #define elf_info_to_howto_rel 0
4657 #define elf_backend_can_gc_sections 1
4658 #define elf_backend_rela_normal 1
4659 #define elf_backend_check_relocs mn10300_elf_check_relocs
4660 #define elf_backend_gc_mark_hook mn10300_elf_gc_mark_hook
4661 #define elf_backend_relocate_section mn10300_elf_relocate_section
4662 #define bfd_elf32_bfd_relax_section mn10300_elf_relax_section
4663 #define bfd_elf32_bfd_get_relocated_section_contents \
4664 mn10300_elf_get_relocated_section_contents
4665 #define bfd_elf32_bfd_link_hash_table_create \
4666 elf32_mn10300_link_hash_table_create
4667 #define bfd_elf32_bfd_link_hash_table_free \
4668 elf32_mn10300_link_hash_table_free
4669
4670 #ifndef elf_symbol_leading_char
4671 #define elf_symbol_leading_char '_'
4672 #endif
4673
4674 /* So we can set bits in e_flags. */
4675 #define elf_backend_final_write_processing \
4676 _bfd_mn10300_elf_final_write_processing
4677 #define elf_backend_object_p _bfd_mn10300_elf_object_p
4678
4679 #define bfd_elf32_bfd_merge_private_bfd_data \
4680 _bfd_mn10300_elf_merge_private_bfd_data
4681
4682 #define elf_backend_can_gc_sections 1
4683 #define elf_backend_create_dynamic_sections \
4684 _bfd_mn10300_elf_create_dynamic_sections
4685 #define elf_backend_adjust_dynamic_symbol \
4686 _bfd_mn10300_elf_adjust_dynamic_symbol
4687 #define elf_backend_size_dynamic_sections \
4688 _bfd_mn10300_elf_size_dynamic_sections
4689 #define elf_backend_finish_dynamic_symbol \
4690 _bfd_mn10300_elf_finish_dynamic_symbol
4691 #define elf_backend_finish_dynamic_sections \
4692 _bfd_mn10300_elf_finish_dynamic_sections
4693
4694 #define elf_backend_reloc_type_class \
4695 _bfd_mn10300_elf_reloc_type_class
4696
4697 #define elf_backend_want_got_plt 1
4698 #define elf_backend_plt_readonly 1
4699 #define elf_backend_want_plt_sym 0
4700 #define elf_backend_got_header_size 12
4701
4702 #include "elf32-target.h"
GDB Binutils - Deliverables
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