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[thirdparty/binutils-gdb.git] / bfd / elf-m10300.c
1 /* Matsushita 10300 specific support for 32-bit ELF
2 Copyright (C) 1996-2021 Free Software Foundation, Inc.
3
4 This file is part of BFD, the Binary File Descriptor library.
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
20
21 #include "sysdep.h"
22 #include "bfd.h"
23 #include "libbfd.h"
24 #include "elf-bfd.h"
25 #include "elf/mn10300.h"
26 #include "libiberty.h"
27
28 /* The mn10300 linker needs to keep track of the number of relocs that
29 it decides to copy in check_relocs for each symbol. This is so
30 that it can discard PC relative relocs if it doesn't need them when
31 linking with -Bsymbolic. We store the information in a field
32 extending the regular ELF linker hash table. */
33
34 struct elf32_mn10300_link_hash_entry
35 {
36 /* The basic elf link hash table entry. */
37 struct elf_link_hash_entry root;
38
39 /* For function symbols, the number of times this function is
40 called directly (ie by name). */
41 unsigned int direct_calls;
42
43 /* For function symbols, the size of this function's stack
44 (if <= 255 bytes). We stuff this into "call" instructions
45 to this target when it's valid and profitable to do so.
46
47 This does not include stack allocated by movm! */
48 unsigned char stack_size;
49
50 /* For function symbols, arguments (if any) for movm instruction
51 in the prologue. We stuff this value into "call" instructions
52 to the target when it's valid and profitable to do so. */
53 unsigned char movm_args;
54
55 /* For function symbols, the amount of stack space that would be allocated
56 by the movm instruction. This is redundant with movm_args, but we
57 add it to the hash table to avoid computing it over and over. */
58 unsigned char movm_stack_size;
59
60 /* When set, convert all "call" instructions to this target into "calls"
61 instructions. */
62 #define MN10300_CONVERT_CALL_TO_CALLS 0x1
63
64 /* Used to mark functions which have had redundant parts of their
65 prologue deleted. */
66 #define MN10300_DELETED_PROLOGUE_BYTES 0x2
67 unsigned char flags;
68
69 /* Calculated value. */
70 bfd_vma value;
71
72 #define GOT_UNKNOWN 0
73 #define GOT_NORMAL 1
74 #define GOT_TLS_GD 2
75 #define GOT_TLS_LD 3
76 #define GOT_TLS_IE 4
77 /* Used to distinguish GOT entries for TLS types from normal GOT entries. */
78 unsigned char tls_type;
79 };
80
81 /* We derive a hash table from the main elf linker hash table so
82 we can store state variables and a secondary hash table without
83 resorting to global variables. */
84 struct elf32_mn10300_link_hash_table
85 {
86 /* The main hash table. */
87 struct elf_link_hash_table root;
88
89 /* A hash table for static functions. We could derive a new hash table
90 instead of using the full elf32_mn10300_link_hash_table if we wanted
91 to save some memory. */
92 struct elf32_mn10300_link_hash_table *static_hash_table;
93
94 /* Random linker state flags. */
95 #define MN10300_HASH_ENTRIES_INITIALIZED 0x1
96 char flags;
97 struct
98 {
99 bfd_signed_vma refcount;
100 bfd_vma offset;
101 char got_allocated;
102 char rel_emitted;
103 } tls_ldm_got;
104 };
105
106 #define elf_mn10300_hash_entry(ent) ((struct elf32_mn10300_link_hash_entry *)(ent))
107
108 struct elf_mn10300_obj_tdata
109 {
110 struct elf_obj_tdata root;
111
112 /* tls_type for each local got entry. */
113 char * local_got_tls_type;
114 };
115
116 #define elf_mn10300_tdata(abfd) \
117 ((struct elf_mn10300_obj_tdata *) (abfd)->tdata.any)
118
119 #define elf_mn10300_local_got_tls_type(abfd) \
120 (elf_mn10300_tdata (abfd)->local_got_tls_type)
121
122 #ifndef streq
123 #define streq(a, b) (strcmp ((a),(b)) == 0)
124 #endif
125
126 /* For MN10300 linker hash table. */
127
128 /* Get the MN10300 ELF linker hash table from a link_info structure. */
129
130 #define elf32_mn10300_hash_table(p) \
131 ((is_elf_hash_table ((p)->hash) \
132 && elf_hash_table_id (elf_hash_table (p)) == MN10300_ELF_DATA) \
133 ? (struct elf32_mn10300_link_hash_table *) (p)->hash : NULL)
134
135 #define elf32_mn10300_link_hash_traverse(table, func, info) \
136 (elf_link_hash_traverse \
137 (&(table)->root, \
138 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
139 (info)))
140
141 static reloc_howto_type elf_mn10300_howto_table[] =
142 {
143 /* Dummy relocation. Does nothing. */
144 HOWTO (R_MN10300_NONE,
145 0,
146 3,
147 0,
148 FALSE,
149 0,
150 complain_overflow_dont,
151 bfd_elf_generic_reloc,
152 "R_MN10300_NONE",
153 FALSE,
154 0,
155 0,
156 FALSE),
157 /* Standard 32 bit reloc. */
158 HOWTO (R_MN10300_32,
159 0,
160 2,
161 32,
162 FALSE,
163 0,
164 complain_overflow_bitfield,
165 bfd_elf_generic_reloc,
166 "R_MN10300_32",
167 FALSE,
168 0xffffffff,
169 0xffffffff,
170 FALSE),
171 /* Standard 16 bit reloc. */
172 HOWTO (R_MN10300_16,
173 0,
174 1,
175 16,
176 FALSE,
177 0,
178 complain_overflow_bitfield,
179 bfd_elf_generic_reloc,
180 "R_MN10300_16",
181 FALSE,
182 0xffff,
183 0xffff,
184 FALSE),
185 /* Standard 8 bit reloc. */
186 HOWTO (R_MN10300_8,
187 0,
188 0,
189 8,
190 FALSE,
191 0,
192 complain_overflow_bitfield,
193 bfd_elf_generic_reloc,
194 "R_MN10300_8",
195 FALSE,
196 0xff,
197 0xff,
198 FALSE),
199 /* Standard 32bit pc-relative reloc. */
200 HOWTO (R_MN10300_PCREL32,
201 0,
202 2,
203 32,
204 TRUE,
205 0,
206 complain_overflow_bitfield,
207 bfd_elf_generic_reloc,
208 "R_MN10300_PCREL32",
209 FALSE,
210 0xffffffff,
211 0xffffffff,
212 TRUE),
213 /* Standard 16bit pc-relative reloc. */
214 HOWTO (R_MN10300_PCREL16,
215 0,
216 1,
217 16,
218 TRUE,
219 0,
220 complain_overflow_bitfield,
221 bfd_elf_generic_reloc,
222 "R_MN10300_PCREL16",
223 FALSE,
224 0xffff,
225 0xffff,
226 TRUE),
227 /* Standard 8 pc-relative reloc. */
228 HOWTO (R_MN10300_PCREL8,
229 0,
230 0,
231 8,
232 TRUE,
233 0,
234 complain_overflow_bitfield,
235 bfd_elf_generic_reloc,
236 "R_MN10300_PCREL8",
237 FALSE,
238 0xff,
239 0xff,
240 TRUE),
241
242 /* GNU extension to record C++ vtable hierarchy. */
243 HOWTO (R_MN10300_GNU_VTINHERIT, /* type */
244 0, /* rightshift */
245 0, /* size (0 = byte, 1 = short, 2 = long) */
246 0, /* bitsize */
247 FALSE, /* pc_relative */
248 0, /* bitpos */
249 complain_overflow_dont, /* complain_on_overflow */
250 NULL, /* special_function */
251 "R_MN10300_GNU_VTINHERIT", /* name */
252 FALSE, /* partial_inplace */
253 0, /* src_mask */
254 0, /* dst_mask */
255 FALSE), /* pcrel_offset */
256
257 /* GNU extension to record C++ vtable member usage */
258 HOWTO (R_MN10300_GNU_VTENTRY, /* type */
259 0, /* rightshift */
260 0, /* size (0 = byte, 1 = short, 2 = long) */
261 0, /* bitsize */
262 FALSE, /* pc_relative */
263 0, /* bitpos */
264 complain_overflow_dont, /* complain_on_overflow */
265 NULL, /* special_function */
266 "R_MN10300_GNU_VTENTRY", /* name */
267 FALSE, /* partial_inplace */
268 0, /* src_mask */
269 0, /* dst_mask */
270 FALSE), /* pcrel_offset */
271
272 /* Standard 24 bit reloc. */
273 HOWTO (R_MN10300_24,
274 0,
275 2,
276 24,
277 FALSE,
278 0,
279 complain_overflow_bitfield,
280 bfd_elf_generic_reloc,
281 "R_MN10300_24",
282 FALSE,
283 0xffffff,
284 0xffffff,
285 FALSE),
286 HOWTO (R_MN10300_GOTPC32, /* type */
287 0, /* rightshift */
288 2, /* size (0 = byte, 1 = short, 2 = long) */
289 32, /* bitsize */
290 TRUE, /* pc_relative */
291 0, /* bitpos */
292 complain_overflow_bitfield, /* complain_on_overflow */
293 bfd_elf_generic_reloc, /* */
294 "R_MN10300_GOTPC32", /* name */
295 FALSE, /* partial_inplace */
296 0xffffffff, /* src_mask */
297 0xffffffff, /* dst_mask */
298 TRUE), /* pcrel_offset */
299
300 HOWTO (R_MN10300_GOTPC16, /* type */
301 0, /* rightshift */
302 1, /* size (0 = byte, 1 = short, 2 = long) */
303 16, /* bitsize */
304 TRUE, /* pc_relative */
305 0, /* bitpos */
306 complain_overflow_bitfield, /* complain_on_overflow */
307 bfd_elf_generic_reloc, /* */
308 "R_MN10300_GOTPC16", /* name */
309 FALSE, /* partial_inplace */
310 0xffff, /* src_mask */
311 0xffff, /* dst_mask */
312 TRUE), /* pcrel_offset */
313
314 HOWTO (R_MN10300_GOTOFF32, /* type */
315 0, /* rightshift */
316 2, /* size (0 = byte, 1 = short, 2 = long) */
317 32, /* bitsize */
318 FALSE, /* pc_relative */
319 0, /* bitpos */
320 complain_overflow_bitfield, /* complain_on_overflow */
321 bfd_elf_generic_reloc, /* */
322 "R_MN10300_GOTOFF32", /* name */
323 FALSE, /* partial_inplace */
324 0xffffffff, /* src_mask */
325 0xffffffff, /* dst_mask */
326 FALSE), /* pcrel_offset */
327
328 HOWTO (R_MN10300_GOTOFF24, /* type */
329 0, /* rightshift */
330 2, /* size (0 = byte, 1 = short, 2 = long) */
331 24, /* bitsize */
332 FALSE, /* pc_relative */
333 0, /* bitpos */
334 complain_overflow_bitfield, /* complain_on_overflow */
335 bfd_elf_generic_reloc, /* */
336 "R_MN10300_GOTOFF24", /* name */
337 FALSE, /* partial_inplace */
338 0xffffff, /* src_mask */
339 0xffffff, /* dst_mask */
340 FALSE), /* pcrel_offset */
341
342 HOWTO (R_MN10300_GOTOFF16, /* type */
343 0, /* rightshift */
344 1, /* size (0 = byte, 1 = short, 2 = long) */
345 16, /* bitsize */
346 FALSE, /* pc_relative */
347 0, /* bitpos */
348 complain_overflow_bitfield, /* complain_on_overflow */
349 bfd_elf_generic_reloc, /* */
350 "R_MN10300_GOTOFF16", /* name */
351 FALSE, /* partial_inplace */
352 0xffff, /* src_mask */
353 0xffff, /* dst_mask */
354 FALSE), /* pcrel_offset */
355
356 HOWTO (R_MN10300_PLT32, /* type */
357 0, /* rightshift */
358 2, /* size (0 = byte, 1 = short, 2 = long) */
359 32, /* bitsize */
360 TRUE, /* pc_relative */
361 0, /* bitpos */
362 complain_overflow_bitfield, /* complain_on_overflow */
363 bfd_elf_generic_reloc, /* */
364 "R_MN10300_PLT32", /* name */
365 FALSE, /* partial_inplace */
366 0xffffffff, /* src_mask */
367 0xffffffff, /* dst_mask */
368 TRUE), /* pcrel_offset */
369
370 HOWTO (R_MN10300_PLT16, /* type */
371 0, /* rightshift */
372 1, /* size (0 = byte, 1 = short, 2 = long) */
373 16, /* bitsize */
374 TRUE, /* pc_relative */
375 0, /* bitpos */
376 complain_overflow_bitfield, /* complain_on_overflow */
377 bfd_elf_generic_reloc, /* */
378 "R_MN10300_PLT16", /* name */
379 FALSE, /* partial_inplace */
380 0xffff, /* src_mask */
381 0xffff, /* dst_mask */
382 TRUE), /* pcrel_offset */
383
384 HOWTO (R_MN10300_GOT32, /* type */
385 0, /* rightshift */
386 2, /* size (0 = byte, 1 = short, 2 = long) */
387 32, /* bitsize */
388 FALSE, /* pc_relative */
389 0, /* bitpos */
390 complain_overflow_bitfield, /* complain_on_overflow */
391 bfd_elf_generic_reloc, /* */
392 "R_MN10300_GOT32", /* name */
393 FALSE, /* partial_inplace */
394 0xffffffff, /* src_mask */
395 0xffffffff, /* dst_mask */
396 FALSE), /* pcrel_offset */
397
398 HOWTO (R_MN10300_GOT24, /* type */
399 0, /* rightshift */
400 2, /* size (0 = byte, 1 = short, 2 = long) */
401 24, /* bitsize */
402 FALSE, /* pc_relative */
403 0, /* bitpos */
404 complain_overflow_bitfield, /* complain_on_overflow */
405 bfd_elf_generic_reloc, /* */
406 "R_MN10300_GOT24", /* name */
407 FALSE, /* partial_inplace */
408 0xffffffff, /* src_mask */
409 0xffffffff, /* dst_mask */
410 FALSE), /* pcrel_offset */
411
412 HOWTO (R_MN10300_GOT16, /* type */
413 0, /* rightshift */
414 1, /* size (0 = byte, 1 = short, 2 = long) */
415 16, /* bitsize */
416 FALSE, /* pc_relative */
417 0, /* bitpos */
418 complain_overflow_bitfield, /* complain_on_overflow */
419 bfd_elf_generic_reloc, /* */
420 "R_MN10300_GOT16", /* name */
421 FALSE, /* partial_inplace */
422 0xffffffff, /* src_mask */
423 0xffffffff, /* dst_mask */
424 FALSE), /* pcrel_offset */
425
426 HOWTO (R_MN10300_COPY, /* type */
427 0, /* rightshift */
428 2, /* size (0 = byte, 1 = short, 2 = long) */
429 32, /* bitsize */
430 FALSE, /* pc_relative */
431 0, /* bitpos */
432 complain_overflow_bitfield, /* complain_on_overflow */
433 bfd_elf_generic_reloc, /* */
434 "R_MN10300_COPY", /* name */
435 FALSE, /* partial_inplace */
436 0xffffffff, /* src_mask */
437 0xffffffff, /* dst_mask */
438 FALSE), /* pcrel_offset */
439
440 HOWTO (R_MN10300_GLOB_DAT, /* type */
441 0, /* rightshift */
442 2, /* size (0 = byte, 1 = short, 2 = long) */
443 32, /* bitsize */
444 FALSE, /* pc_relative */
445 0, /* bitpos */
446 complain_overflow_bitfield, /* complain_on_overflow */
447 bfd_elf_generic_reloc, /* */
448 "R_MN10300_GLOB_DAT", /* name */
449 FALSE, /* partial_inplace */
450 0xffffffff, /* src_mask */
451 0xffffffff, /* dst_mask */
452 FALSE), /* pcrel_offset */
453
454 HOWTO (R_MN10300_JMP_SLOT, /* type */
455 0, /* rightshift */
456 2, /* size (0 = byte, 1 = short, 2 = long) */
457 32, /* bitsize */
458 FALSE, /* pc_relative */
459 0, /* bitpos */
460 complain_overflow_bitfield, /* complain_on_overflow */
461 bfd_elf_generic_reloc, /* */
462 "R_MN10300_JMP_SLOT", /* name */
463 FALSE, /* partial_inplace */
464 0xffffffff, /* src_mask */
465 0xffffffff, /* dst_mask */
466 FALSE), /* pcrel_offset */
467
468 HOWTO (R_MN10300_RELATIVE, /* type */
469 0, /* rightshift */
470 2, /* size (0 = byte, 1 = short, 2 = long) */
471 32, /* bitsize */
472 FALSE, /* pc_relative */
473 0, /* bitpos */
474 complain_overflow_bitfield, /* complain_on_overflow */
475 bfd_elf_generic_reloc, /* */
476 "R_MN10300_RELATIVE", /* name */
477 FALSE, /* partial_inplace */
478 0xffffffff, /* src_mask */
479 0xffffffff, /* dst_mask */
480 FALSE), /* pcrel_offset */
481
482 HOWTO (R_MN10300_TLS_GD, /* type */
483 0, /* rightshift */
484 2, /* size (0 = byte, 1 = short, 2 = long) */
485 32, /* bitsize */
486 FALSE, /* pc_relative */
487 0, /* bitpos */
488 complain_overflow_bitfield, /* complain_on_overflow */
489 bfd_elf_generic_reloc, /* */
490 "R_MN10300_TLS_GD", /* name */
491 FALSE, /* partial_inplace */
492 0xffffffff, /* src_mask */
493 0xffffffff, /* dst_mask */
494 FALSE), /* pcrel_offset */
495
496 HOWTO (R_MN10300_TLS_LD, /* type */
497 0, /* rightshift */
498 2, /* size (0 = byte, 1 = short, 2 = long) */
499 32, /* bitsize */
500 FALSE, /* pc_relative */
501 0, /* bitpos */
502 complain_overflow_bitfield, /* complain_on_overflow */
503 bfd_elf_generic_reloc, /* */
504 "R_MN10300_TLS_LD", /* name */
505 FALSE, /* partial_inplace */
506 0xffffffff, /* src_mask */
507 0xffffffff, /* dst_mask */
508 FALSE), /* pcrel_offset */
509
510 HOWTO (R_MN10300_TLS_LDO, /* type */
511 0, /* rightshift */
512 2, /* size (0 = byte, 1 = short, 2 = long) */
513 32, /* bitsize */
514 FALSE, /* pc_relative */
515 0, /* bitpos */
516 complain_overflow_bitfield, /* complain_on_overflow */
517 bfd_elf_generic_reloc, /* */
518 "R_MN10300_TLS_LDO", /* name */
519 FALSE, /* partial_inplace */
520 0xffffffff, /* src_mask */
521 0xffffffff, /* dst_mask */
522 FALSE), /* pcrel_offset */
523
524 HOWTO (R_MN10300_TLS_GOTIE, /* type */
525 0, /* rightshift */
526 2, /* size (0 = byte, 1 = short, 2 = long) */
527 32, /* bitsize */
528 FALSE, /* pc_relative */
529 0, /* bitpos */
530 complain_overflow_bitfield, /* complain_on_overflow */
531 bfd_elf_generic_reloc, /* */
532 "R_MN10300_TLS_GOTIE", /* name */
533 FALSE, /* partial_inplace */
534 0xffffffff, /* src_mask */
535 0xffffffff, /* dst_mask */
536 FALSE), /* pcrel_offset */
537
538 HOWTO (R_MN10300_TLS_IE, /* type */
539 0, /* rightshift */
540 2, /* size (0 = byte, 1 = short, 2 = long) */
541 32, /* bitsize */
542 FALSE, /* pc_relative */
543 0, /* bitpos */
544 complain_overflow_bitfield, /* complain_on_overflow */
545 bfd_elf_generic_reloc, /* */
546 "R_MN10300_TLS_IE", /* name */
547 FALSE, /* partial_inplace */
548 0xffffffff, /* src_mask */
549 0xffffffff, /* dst_mask */
550 FALSE), /* pcrel_offset */
551
552 HOWTO (R_MN10300_TLS_LE, /* type */
553 0, /* rightshift */
554 2, /* size (0 = byte, 1 = short, 2 = long) */
555 32, /* bitsize */
556 FALSE, /* pc_relative */
557 0, /* bitpos */
558 complain_overflow_bitfield, /* complain_on_overflow */
559 bfd_elf_generic_reloc, /* */
560 "R_MN10300_TLS_LE", /* name */
561 FALSE, /* partial_inplace */
562 0xffffffff, /* src_mask */
563 0xffffffff, /* dst_mask */
564 FALSE), /* pcrel_offset */
565
566 HOWTO (R_MN10300_TLS_DTPMOD, /* type */
567 0, /* rightshift */
568 2, /* size (0 = byte, 1 = short, 2 = long) */
569 32, /* bitsize */
570 FALSE, /* pc_relative */
571 0, /* bitpos */
572 complain_overflow_bitfield, /* complain_on_overflow */
573 bfd_elf_generic_reloc, /* */
574 "R_MN10300_TLS_DTPMOD", /* name */
575 FALSE, /* partial_inplace */
576 0xffffffff, /* src_mask */
577 0xffffffff, /* dst_mask */
578 FALSE), /* pcrel_offset */
579
580 HOWTO (R_MN10300_TLS_DTPOFF, /* type */
581 0, /* rightshift */
582 2, /* size (0 = byte, 1 = short, 2 = long) */
583 32, /* bitsize */
584 FALSE, /* pc_relative */
585 0, /* bitpos */
586 complain_overflow_bitfield, /* complain_on_overflow */
587 bfd_elf_generic_reloc, /* */
588 "R_MN10300_TLS_DTPOFF", /* name */
589 FALSE, /* partial_inplace */
590 0xffffffff, /* src_mask */
591 0xffffffff, /* dst_mask */
592 FALSE), /* pcrel_offset */
593
594 HOWTO (R_MN10300_TLS_TPOFF, /* type */
595 0, /* rightshift */
596 2, /* size (0 = byte, 1 = short, 2 = long) */
597 32, /* bitsize */
598 FALSE, /* pc_relative */
599 0, /* bitpos */
600 complain_overflow_bitfield, /* complain_on_overflow */
601 bfd_elf_generic_reloc, /* */
602 "R_MN10300_TLS_TPOFF", /* name */
603 FALSE, /* partial_inplace */
604 0xffffffff, /* src_mask */
605 0xffffffff, /* dst_mask */
606 FALSE), /* pcrel_offset */
607
608 HOWTO (R_MN10300_SYM_DIFF, /* type */
609 0, /* rightshift */
610 2, /* size (0 = byte, 1 = short, 2 = long) */
611 32, /* bitsize */
612 FALSE, /* pc_relative */
613 0, /* bitpos */
614 complain_overflow_dont,/* complain_on_overflow */
615 NULL, /* special handler. */
616 "R_MN10300_SYM_DIFF", /* name */
617 FALSE, /* partial_inplace */
618 0xffffffff, /* src_mask */
619 0xffffffff, /* dst_mask */
620 FALSE), /* pcrel_offset */
621
622 HOWTO (R_MN10300_ALIGN, /* type */
623 0, /* rightshift */
624 0, /* size (0 = byte, 1 = short, 2 = long) */
625 32, /* bitsize */
626 FALSE, /* pc_relative */
627 0, /* bitpos */
628 complain_overflow_dont,/* complain_on_overflow */
629 NULL, /* special handler. */
630 "R_MN10300_ALIGN", /* name */
631 FALSE, /* partial_inplace */
632 0, /* src_mask */
633 0, /* dst_mask */
634 FALSE) /* pcrel_offset */
635 };
636
637 struct mn10300_reloc_map
638 {
639 bfd_reloc_code_real_type bfd_reloc_val;
640 unsigned char elf_reloc_val;
641 };
642
643 static const struct mn10300_reloc_map mn10300_reloc_map[] =
644 {
645 { BFD_RELOC_NONE, R_MN10300_NONE, },
646 { BFD_RELOC_32, R_MN10300_32, },
647 { BFD_RELOC_16, R_MN10300_16, },
648 { BFD_RELOC_8, R_MN10300_8, },
649 { BFD_RELOC_32_PCREL, R_MN10300_PCREL32, },
650 { BFD_RELOC_16_PCREL, R_MN10300_PCREL16, },
651 { BFD_RELOC_8_PCREL, R_MN10300_PCREL8, },
652 { BFD_RELOC_24, R_MN10300_24, },
653 { BFD_RELOC_VTABLE_INHERIT, R_MN10300_GNU_VTINHERIT },
654 { BFD_RELOC_VTABLE_ENTRY, R_MN10300_GNU_VTENTRY },
655 { BFD_RELOC_32_GOT_PCREL, R_MN10300_GOTPC32 },
656 { BFD_RELOC_16_GOT_PCREL, R_MN10300_GOTPC16 },
657 { BFD_RELOC_32_GOTOFF, R_MN10300_GOTOFF32 },
658 { BFD_RELOC_MN10300_GOTOFF24, R_MN10300_GOTOFF24 },
659 { BFD_RELOC_16_GOTOFF, R_MN10300_GOTOFF16 },
660 { BFD_RELOC_32_PLT_PCREL, R_MN10300_PLT32 },
661 { BFD_RELOC_16_PLT_PCREL, R_MN10300_PLT16 },
662 { BFD_RELOC_MN10300_GOT32, R_MN10300_GOT32 },
663 { BFD_RELOC_MN10300_GOT24, R_MN10300_GOT24 },
664 { BFD_RELOC_MN10300_GOT16, R_MN10300_GOT16 },
665 { BFD_RELOC_MN10300_COPY, R_MN10300_COPY },
666 { BFD_RELOC_MN10300_GLOB_DAT, R_MN10300_GLOB_DAT },
667 { BFD_RELOC_MN10300_JMP_SLOT, R_MN10300_JMP_SLOT },
668 { BFD_RELOC_MN10300_RELATIVE, R_MN10300_RELATIVE },
669 { BFD_RELOC_MN10300_TLS_GD, R_MN10300_TLS_GD },
670 { BFD_RELOC_MN10300_TLS_LD, R_MN10300_TLS_LD },
671 { BFD_RELOC_MN10300_TLS_LDO, R_MN10300_TLS_LDO },
672 { BFD_RELOC_MN10300_TLS_GOTIE, R_MN10300_TLS_GOTIE },
673 { BFD_RELOC_MN10300_TLS_IE, R_MN10300_TLS_IE },
674 { BFD_RELOC_MN10300_TLS_LE, R_MN10300_TLS_LE },
675 { BFD_RELOC_MN10300_TLS_DTPMOD, R_MN10300_TLS_DTPMOD },
676 { BFD_RELOC_MN10300_TLS_DTPOFF, R_MN10300_TLS_DTPOFF },
677 { BFD_RELOC_MN10300_TLS_TPOFF, R_MN10300_TLS_TPOFF },
678 { BFD_RELOC_MN10300_SYM_DIFF, R_MN10300_SYM_DIFF },
679 { BFD_RELOC_MN10300_ALIGN, R_MN10300_ALIGN }
680 };
681
682 /* Create the GOT section. */
683
684 static bfd_boolean
685 _bfd_mn10300_elf_create_got_section (bfd * abfd,
686 struct bfd_link_info * info)
687 {
688 flagword flags;
689 flagword pltflags;
690 asection * s;
691 struct elf_link_hash_entry * h;
692 const struct elf_backend_data * bed = get_elf_backend_data (abfd);
693 struct elf_link_hash_table *htab;
694 int ptralign;
695
696 /* This function may be called more than once. */
697 htab = elf_hash_table (info);
698 if (htab->sgot != NULL)
699 return TRUE;
700
701 switch (bed->s->arch_size)
702 {
703 case 32:
704 ptralign = 2;
705 break;
706
707 case 64:
708 ptralign = 3;
709 break;
710
711 default:
712 bfd_set_error (bfd_error_bad_value);
713 return FALSE;
714 }
715
716 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
717 | SEC_LINKER_CREATED);
718
719 pltflags = flags;
720 pltflags |= SEC_CODE;
721 if (bed->plt_not_loaded)
722 pltflags &= ~ (SEC_LOAD | SEC_HAS_CONTENTS);
723 if (bed->plt_readonly)
724 pltflags |= SEC_READONLY;
725
726 s = bfd_make_section_anyway_with_flags (abfd, ".plt", pltflags);
727 htab->splt = s;
728 if (s == NULL
729 || !bfd_set_section_alignment (s, bed->plt_alignment))
730 return FALSE;
731
732 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
733 .plt section. */
734 if (bed->want_plt_sym)
735 {
736 h = _bfd_elf_define_linkage_sym (abfd, info, s,
737 "_PROCEDURE_LINKAGE_TABLE_");
738 htab->hplt = h;
739 if (h == NULL)
740 return FALSE;
741 }
742
743 s = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
744 htab->sgot = s;
745 if (s == NULL
746 || !bfd_set_section_alignment (s, ptralign))
747 return FALSE;
748
749 if (bed->want_got_plt)
750 {
751 s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags);
752 htab->sgotplt = s;
753 if (s == NULL
754 || !bfd_set_section_alignment (s, ptralign))
755 return FALSE;
756 }
757
758 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
759 (or .got.plt) section. We don't do this in the linker script
760 because we don't want to define the symbol if we are not creating
761 a global offset table. */
762 h = _bfd_elf_define_linkage_sym (abfd, info, s, "_GLOBAL_OFFSET_TABLE_");
763 htab->hgot = h;
764 if (h == NULL)
765 return FALSE;
766
767 /* The first bit of the global offset table is the header. */
768 s->size += bed->got_header_size;
769
770 return TRUE;
771 }
772
773 static reloc_howto_type *
774 bfd_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
775 bfd_reloc_code_real_type code)
776 {
777 unsigned int i;
778
779 for (i = ARRAY_SIZE (mn10300_reloc_map); i--;)
780 if (mn10300_reloc_map[i].bfd_reloc_val == code)
781 return &elf_mn10300_howto_table[mn10300_reloc_map[i].elf_reloc_val];
782
783 return NULL;
784 }
785
786 static reloc_howto_type *
787 bfd_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
788 const char *r_name)
789 {
790 unsigned int i;
791
792 for (i = ARRAY_SIZE (elf_mn10300_howto_table); i--;)
793 if (elf_mn10300_howto_table[i].name != NULL
794 && strcasecmp (elf_mn10300_howto_table[i].name, r_name) == 0)
795 return elf_mn10300_howto_table + i;
796
797 return NULL;
798 }
799
800 /* Set the howto pointer for an MN10300 ELF reloc. */
801
802 static bfd_boolean
803 mn10300_info_to_howto (bfd *abfd,
804 arelent *cache_ptr,
805 Elf_Internal_Rela *dst)
806 {
807 unsigned int r_type;
808
809 r_type = ELF32_R_TYPE (dst->r_info);
810 if (r_type >= R_MN10300_MAX)
811 {
812 /* xgettext:c-format */
813 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
814 abfd, r_type);
815 bfd_set_error (bfd_error_bad_value);
816 return FALSE;
817 }
818 cache_ptr->howto = elf_mn10300_howto_table + r_type;
819 return TRUE;
820 }
821
822 static int
823 elf_mn10300_tls_transition (struct bfd_link_info * info,
824 int r_type,
825 struct elf_link_hash_entry * h,
826 asection * sec,
827 bfd_boolean counting)
828 {
829 bfd_boolean is_local;
830
831 if (r_type == R_MN10300_TLS_GD
832 && h != NULL
833 && elf_mn10300_hash_entry (h)->tls_type == GOT_TLS_IE)
834 return R_MN10300_TLS_GOTIE;
835
836 if (bfd_link_pic (info))
837 return r_type;
838
839 if (! (sec->flags & SEC_CODE))
840 return r_type;
841
842 if (! counting && h != NULL && ! elf_hash_table (info)->dynamic_sections_created)
843 is_local = TRUE;
844 else
845 is_local = SYMBOL_CALLS_LOCAL (info, h);
846
847 /* For the main program, these are the transitions we do. */
848 switch (r_type)
849 {
850 case R_MN10300_TLS_GD: return is_local ? R_MN10300_TLS_LE : R_MN10300_TLS_GOTIE;
851 case R_MN10300_TLS_LD: return R_MN10300_NONE;
852 case R_MN10300_TLS_LDO: return R_MN10300_TLS_LE;
853 case R_MN10300_TLS_IE:
854 case R_MN10300_TLS_GOTIE: return is_local ? R_MN10300_TLS_LE : r_type;
855 }
856
857 return r_type;
858 }
859
860 /* Return the relocation value for @tpoff relocation
861 if STT_TLS virtual address is ADDRESS. */
862
863 static bfd_vma
864 dtpoff (struct bfd_link_info * info, bfd_vma address)
865 {
866 struct elf_link_hash_table *htab = elf_hash_table (info);
867
868 /* If tls_sec is NULL, we should have signalled an error already. */
869 if (htab->tls_sec == NULL)
870 return 0;
871 return address - htab->tls_sec->vma;
872 }
873
874 /* Return the relocation value for @tpoff relocation
875 if STT_TLS virtual address is ADDRESS. */
876
877 static bfd_vma
878 tpoff (struct bfd_link_info * info, bfd_vma address)
879 {
880 struct elf_link_hash_table *htab = elf_hash_table (info);
881
882 /* If tls_sec is NULL, we should have signalled an error already. */
883 if (htab->tls_sec == NULL)
884 return 0;
885 return address - (htab->tls_size + htab->tls_sec->vma);
886 }
887
888 /* Returns nonzero if there's a R_MN10300_PLT32 reloc that we now need
889 to skip, after this one. The actual value is the offset between
890 this reloc and the PLT reloc. */
891
892 static int
893 mn10300_do_tls_transition (bfd * input_bfd,
894 unsigned int r_type,
895 unsigned int tls_r_type,
896 bfd_byte * contents,
897 bfd_vma offset)
898 {
899 bfd_byte *op = contents + offset;
900 int gotreg = 0;
901
902 #define TLS_PAIR(r1,r2) ((r1) * R_MN10300_MAX + (r2))
903
904 /* This is common to all GD/LD transitions, so break it out. */
905 if (r_type == R_MN10300_TLS_GD
906 || r_type == R_MN10300_TLS_LD)
907 {
908 op -= 2;
909 /* mov imm,d0. */
910 BFD_ASSERT (bfd_get_8 (input_bfd, op) == 0xFC);
911 BFD_ASSERT (bfd_get_8 (input_bfd, op + 1) == 0xCC);
912 /* add aN,d0. */
913 BFD_ASSERT (bfd_get_8 (input_bfd, op + 6) == 0xF1);
914 gotreg = (bfd_get_8 (input_bfd, op + 7) & 0x0c) >> 2;
915 /* Call. */
916 BFD_ASSERT (bfd_get_8 (input_bfd, op + 8) == 0xDD);
917 }
918
919 switch (TLS_PAIR (r_type, tls_r_type))
920 {
921 case TLS_PAIR (R_MN10300_TLS_GD, R_MN10300_TLS_GOTIE):
922 {
923 /* Keep track of which register we put GOTptr in. */
924 /* mov (_x@indntpoff,a2),a0. */
925 memcpy (op, "\xFC\x20\x00\x00\x00\x00", 6);
926 op[1] |= gotreg;
927 /* add e2,a0. */
928 memcpy (op+6, "\xF9\x78\x28", 3);
929 /* or 0x00000000, d0 - six byte nop. */
930 memcpy (op+9, "\xFC\xE4\x00\x00\x00\x00", 6);
931 }
932 return 7;
933
934 case TLS_PAIR (R_MN10300_TLS_GD, R_MN10300_TLS_LE):
935 {
936 /* Register is *always* a0. */
937 /* mov _x@tpoff,a0. */
938 memcpy (op, "\xFC\xDC\x00\x00\x00\x00", 6);
939 /* add e2,a0. */
940 memcpy (op+6, "\xF9\x78\x28", 3);
941 /* or 0x00000000, d0 - six byte nop. */
942 memcpy (op+9, "\xFC\xE4\x00\x00\x00\x00", 6);
943 }
944 return 7;
945 case TLS_PAIR (R_MN10300_TLS_LD, R_MN10300_NONE):
946 {
947 /* Register is *always* a0. */
948 /* mov e2,a0. */
949 memcpy (op, "\xF5\x88", 2);
950 /* or 0x00000000, d0 - six byte nop. */
951 memcpy (op+2, "\xFC\xE4\x00\x00\x00\x00", 6);
952 /* or 0x00000000, e2 - seven byte nop. */
953 memcpy (op+8, "\xFE\x19\x22\x00\x00\x00\x00", 7);
954 }
955 return 7;
956
957 case TLS_PAIR (R_MN10300_TLS_LDO, R_MN10300_TLS_LE):
958 /* No changes needed, just the reloc change. */
959 return 0;
960
961 /* These are a little tricky, because we have to detect which
962 opcode is being used (they're different sizes, with the reloc
963 at different offsets within the opcode) and convert each
964 accordingly, copying the operands as needed. The conversions
965 we do are as follows (IE,GOTIE,LE):
966
967 1111 1100 1010 01Dn [-- abs32 --] MOV (x@indntpoff),Dn
968 1111 1100 0000 DnAm [-- abs32 --] MOV (x@gotntpoff,Am),Dn
969 1111 1100 1100 11Dn [-- abs32 --] MOV x@tpoff,Dn
970
971 1111 1100 1010 00An [-- abs32 --] MOV (x@indntpoff),An
972 1111 1100 0010 AnAm [-- abs32 --] MOV (x@gotntpoff,Am),An
973 1111 1100 1101 11An [-- abs32 --] MOV x@tpoff,An
974
975 1111 1110 0000 1110 Rnnn Xxxx [-- abs32 --] MOV (x@indntpoff),Rn
976 1111 1110 0000 1010 Rnnn Rmmm [-- abs32 --] MOV (x@indntpoff,Rm),Rn
977 1111 1110 0000 1000 Rnnn Xxxx [-- abs32 --] MOV x@tpoff,Rn
978
979 Since the GOT pointer is always $a2, we assume the last
980 normally won't happen, but let's be paranoid and plan for the
981 day that GCC optimizes it somewhow. */
982
983 case TLS_PAIR (R_MN10300_TLS_IE, R_MN10300_TLS_LE):
984 if (op[-2] == 0xFC)
985 {
986 op -= 2;
987 if ((op[1] & 0xFC) == 0xA4) /* Dn */
988 {
989 op[1] &= 0x03; /* Leaves Dn. */
990 op[1] |= 0xCC;
991 }
992 else /* An */
993 {
994 op[1] &= 0x03; /* Leaves An. */
995 op[1] |= 0xDC;
996 }
997 }
998 else if (op[-3] == 0xFE)
999 op[-2] = 0x08;
1000 else
1001 abort ();
1002 break;
1003
1004 case TLS_PAIR (R_MN10300_TLS_GOTIE, R_MN10300_TLS_LE):
1005 if (op[-2] == 0xFC)
1006 {
1007 op -= 2;
1008 if ((op[1] & 0xF0) == 0x00) /* Dn */
1009 {
1010 op[1] &= 0x0C; /* Leaves Dn. */
1011 op[1] >>= 2;
1012 op[1] |= 0xCC;
1013 }
1014 else /* An */
1015 {
1016 op[1] &= 0x0C; /* Leaves An. */
1017 op[1] >>= 2;
1018 op[1] |= 0xDC;
1019 }
1020 }
1021 else if (op[-3] == 0xFE)
1022 op[-2] = 0x08;
1023 else
1024 abort ();
1025 break;
1026
1027 default:
1028 _bfd_error_handler
1029 /* xgettext:c-format */
1030 (_("%pB: unsupported transition from %s to %s"),
1031 input_bfd,
1032 elf_mn10300_howto_table[r_type].name,
1033 elf_mn10300_howto_table[tls_r_type].name);
1034 break;
1035 }
1036 #undef TLS_PAIR
1037 return 0;
1038 }
1039
1040 /* Look through the relocs for a section during the first phase.
1041 Since we don't do .gots or .plts, we just need to consider the
1042 virtual table relocs for gc. */
1043
1044 static bfd_boolean
1045 mn10300_elf_check_relocs (bfd *abfd,
1046 struct bfd_link_info *info,
1047 asection *sec,
1048 const Elf_Internal_Rela *relocs)
1049 {
1050 struct elf32_mn10300_link_hash_table * htab = elf32_mn10300_hash_table (info);
1051 bfd_boolean sym_diff_reloc_seen;
1052 Elf_Internal_Shdr *symtab_hdr;
1053 Elf_Internal_Sym * isymbuf = NULL;
1054 struct elf_link_hash_entry **sym_hashes;
1055 const Elf_Internal_Rela *rel;
1056 const Elf_Internal_Rela *rel_end;
1057 bfd * dynobj;
1058 bfd_vma * local_got_offsets;
1059 asection * sgot;
1060 asection * srelgot;
1061 asection * sreloc;
1062 bfd_boolean result = FALSE;
1063
1064 sgot = NULL;
1065 srelgot = NULL;
1066 sreloc = NULL;
1067
1068 if (bfd_link_relocatable (info))
1069 return TRUE;
1070
1071 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1072 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1073 sym_hashes = elf_sym_hashes (abfd);
1074
1075 dynobj = elf_hash_table (info)->dynobj;
1076 local_got_offsets = elf_local_got_offsets (abfd);
1077 rel_end = relocs + sec->reloc_count;
1078 sym_diff_reloc_seen = FALSE;
1079
1080 for (rel = relocs; rel < rel_end; rel++)
1081 {
1082 struct elf_link_hash_entry *h;
1083 unsigned long r_symndx;
1084 unsigned int r_type;
1085 int tls_type = GOT_NORMAL;
1086
1087 r_symndx = ELF32_R_SYM (rel->r_info);
1088 if (r_symndx < symtab_hdr->sh_info)
1089 h = NULL;
1090 else
1091 {
1092 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1093 while (h->root.type == bfd_link_hash_indirect
1094 || h->root.type == bfd_link_hash_warning)
1095 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1096 }
1097
1098 r_type = ELF32_R_TYPE (rel->r_info);
1099 r_type = elf_mn10300_tls_transition (info, r_type, h, sec, TRUE);
1100
1101 /* Some relocs require a global offset table. */
1102 if (dynobj == NULL)
1103 {
1104 switch (r_type)
1105 {
1106 case R_MN10300_GOT32:
1107 case R_MN10300_GOT24:
1108 case R_MN10300_GOT16:
1109 case R_MN10300_GOTOFF32:
1110 case R_MN10300_GOTOFF24:
1111 case R_MN10300_GOTOFF16:
1112 case R_MN10300_GOTPC32:
1113 case R_MN10300_GOTPC16:
1114 case R_MN10300_TLS_GD:
1115 case R_MN10300_TLS_LD:
1116 case R_MN10300_TLS_GOTIE:
1117 case R_MN10300_TLS_IE:
1118 elf_hash_table (info)->dynobj = dynobj = abfd;
1119 if (! _bfd_mn10300_elf_create_got_section (dynobj, info))
1120 goto fail;
1121 break;
1122
1123 default:
1124 break;
1125 }
1126 }
1127
1128 switch (r_type)
1129 {
1130 /* This relocation describes the C++ object vtable hierarchy.
1131 Reconstruct it for later use during GC. */
1132 case R_MN10300_GNU_VTINHERIT:
1133 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1134 goto fail;
1135 break;
1136
1137 /* This relocation describes which C++ vtable entries are actually
1138 used. Record for later use during GC. */
1139 case R_MN10300_GNU_VTENTRY:
1140 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1141 goto fail;
1142 break;
1143
1144 case R_MN10300_TLS_LD:
1145 htab->tls_ldm_got.refcount ++;
1146 tls_type = GOT_TLS_LD;
1147
1148 if (htab->tls_ldm_got.got_allocated)
1149 break;
1150 goto create_got;
1151
1152 case R_MN10300_TLS_IE:
1153 case R_MN10300_TLS_GOTIE:
1154 if (bfd_link_pic (info))
1155 info->flags |= DF_STATIC_TLS;
1156 /* Fall through */
1157
1158 case R_MN10300_TLS_GD:
1159 case R_MN10300_GOT32:
1160 case R_MN10300_GOT24:
1161 case R_MN10300_GOT16:
1162 create_got:
1163 /* This symbol requires a global offset table entry. */
1164
1165 switch (r_type)
1166 {
1167 case R_MN10300_TLS_IE:
1168 case R_MN10300_TLS_GOTIE: tls_type = GOT_TLS_IE; break;
1169 case R_MN10300_TLS_GD: tls_type = GOT_TLS_GD; break;
1170 default: tls_type = GOT_NORMAL; break;
1171 }
1172
1173 sgot = htab->root.sgot;
1174 srelgot = htab->root.srelgot;
1175 BFD_ASSERT (sgot != NULL && srelgot != NULL);
1176
1177 if (r_type == R_MN10300_TLS_LD)
1178 {
1179 htab->tls_ldm_got.offset = sgot->size;
1180 htab->tls_ldm_got.got_allocated ++;
1181 }
1182 else if (h != NULL)
1183 {
1184 if (elf_mn10300_hash_entry (h)->tls_type != tls_type
1185 && elf_mn10300_hash_entry (h)->tls_type != GOT_UNKNOWN)
1186 {
1187 if (tls_type == GOT_TLS_IE
1188 && elf_mn10300_hash_entry (h)->tls_type == GOT_TLS_GD)
1189 /* No change - this is ok. */;
1190 else if (tls_type == GOT_TLS_GD
1191 && elf_mn10300_hash_entry (h)->tls_type == GOT_TLS_IE)
1192 /* Transition GD->IE. */
1193 tls_type = GOT_TLS_IE;
1194 else
1195 _bfd_error_handler
1196 /* xgettext:c-format */
1197 (_("%pB: %s' accessed both as normal and thread local symbol"),
1198 abfd, h ? h->root.root.string : "<local>");
1199 }
1200
1201 elf_mn10300_hash_entry (h)->tls_type = tls_type;
1202
1203 if (h->got.offset != (bfd_vma) -1)
1204 /* We have already allocated space in the .got. */
1205 break;
1206
1207 h->got.offset = sgot->size;
1208
1209 if (ELF_ST_VISIBILITY (h->other) != STV_INTERNAL
1210 /* Make sure this symbol is output as a dynamic symbol. */
1211 && h->dynindx == -1)
1212 {
1213 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1214 goto fail;
1215 }
1216
1217 srelgot->size += sizeof (Elf32_External_Rela);
1218 if (r_type == R_MN10300_TLS_GD)
1219 srelgot->size += sizeof (Elf32_External_Rela);
1220 }
1221 else
1222 {
1223 /* This is a global offset table entry for a local
1224 symbol. */
1225 if (local_got_offsets == NULL)
1226 {
1227 size_t size;
1228 unsigned int i;
1229
1230 size = symtab_hdr->sh_info * (sizeof (bfd_vma) + sizeof (char));
1231 local_got_offsets = bfd_alloc (abfd, size);
1232
1233 if (local_got_offsets == NULL)
1234 goto fail;
1235
1236 elf_local_got_offsets (abfd) = local_got_offsets;
1237 elf_mn10300_local_got_tls_type (abfd)
1238 = (char *) (local_got_offsets + symtab_hdr->sh_info);
1239
1240 for (i = 0; i < symtab_hdr->sh_info; i++)
1241 local_got_offsets[i] = (bfd_vma) -1;
1242 }
1243
1244 if (local_got_offsets[r_symndx] != (bfd_vma) -1)
1245 /* We have already allocated space in the .got. */
1246 break;
1247
1248 local_got_offsets[r_symndx] = sgot->size;
1249
1250 if (bfd_link_pic (info))
1251 {
1252 /* If we are generating a shared object, we need to
1253 output a R_MN10300_RELATIVE reloc so that the dynamic
1254 linker can adjust this GOT entry. */
1255 srelgot->size += sizeof (Elf32_External_Rela);
1256
1257 if (r_type == R_MN10300_TLS_GD)
1258 /* And a R_MN10300_TLS_DTPOFF reloc as well. */
1259 srelgot->size += sizeof (Elf32_External_Rela);
1260 }
1261
1262 elf_mn10300_local_got_tls_type (abfd) [r_symndx] = tls_type;
1263 }
1264
1265 sgot->size += 4;
1266 if (r_type == R_MN10300_TLS_GD
1267 || r_type == R_MN10300_TLS_LD)
1268 sgot->size += 4;
1269
1270 goto need_shared_relocs;
1271
1272 case R_MN10300_PLT32:
1273 case R_MN10300_PLT16:
1274 /* This symbol requires a procedure linkage table entry. We
1275 actually build the entry in adjust_dynamic_symbol,
1276 because this might be a case of linking PIC code which is
1277 never referenced by a dynamic object, in which case we
1278 don't need to generate a procedure linkage table entry
1279 after all. */
1280
1281 /* If this is a local symbol, we resolve it directly without
1282 creating a procedure linkage table entry. */
1283 if (h == NULL)
1284 continue;
1285
1286 if (ELF_ST_VISIBILITY (h->other) == STV_INTERNAL
1287 || ELF_ST_VISIBILITY (h->other) == STV_HIDDEN)
1288 break;
1289
1290 h->needs_plt = 1;
1291 break;
1292
1293 case R_MN10300_24:
1294 case R_MN10300_16:
1295 case R_MN10300_8:
1296 case R_MN10300_PCREL32:
1297 case R_MN10300_PCREL16:
1298 case R_MN10300_PCREL8:
1299 if (h != NULL)
1300 h->non_got_ref = 1;
1301 break;
1302
1303 case R_MN10300_SYM_DIFF:
1304 sym_diff_reloc_seen = TRUE;
1305 break;
1306
1307 case R_MN10300_32:
1308 if (h != NULL)
1309 h->non_got_ref = 1;
1310
1311 need_shared_relocs:
1312 /* If we are creating a shared library, then we
1313 need to copy the reloc into the shared library. */
1314 if (bfd_link_pic (info)
1315 && (sec->flags & SEC_ALLOC) != 0
1316 /* Do not generate a dynamic reloc for a
1317 reloc associated with a SYM_DIFF operation. */
1318 && ! sym_diff_reloc_seen)
1319 {
1320 asection * sym_section = NULL;
1321
1322 /* Find the section containing the
1323 symbol involved in the relocation. */
1324 if (h == NULL)
1325 {
1326 Elf_Internal_Sym * isym;
1327
1328 if (isymbuf == NULL)
1329 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
1330 symtab_hdr->sh_info, 0,
1331 NULL, NULL, NULL);
1332 if (isymbuf)
1333 {
1334 isym = isymbuf + r_symndx;
1335 /* All we care about is whether this local symbol is absolute. */
1336 if (isym->st_shndx == SHN_ABS)
1337 sym_section = bfd_abs_section_ptr;
1338 }
1339 }
1340 else
1341 {
1342 if (h->root.type == bfd_link_hash_defined
1343 || h->root.type == bfd_link_hash_defweak)
1344 sym_section = h->root.u.def.section;
1345 }
1346
1347 /* If the symbol is absolute then the relocation can
1348 be resolved during linking and there is no need for
1349 a dynamic reloc. */
1350 if (sym_section != bfd_abs_section_ptr)
1351 {
1352 /* When creating a shared object, we must copy these
1353 reloc types into the output file. We create a reloc
1354 section in dynobj and make room for this reloc. */
1355 if (sreloc == NULL)
1356 {
1357 sreloc = _bfd_elf_make_dynamic_reloc_section
1358 (sec, dynobj, 2, abfd, /*rela?*/ TRUE);
1359 if (sreloc == NULL)
1360 goto fail;
1361 }
1362
1363 sreloc->size += sizeof (Elf32_External_Rela);
1364 }
1365 }
1366
1367 break;
1368 }
1369
1370 if (ELF32_R_TYPE (rel->r_info) != R_MN10300_SYM_DIFF)
1371 sym_diff_reloc_seen = FALSE;
1372 }
1373
1374 result = TRUE;
1375 fail:
1376 if (symtab_hdr->contents != (unsigned char *) isymbuf)
1377 free (isymbuf);
1378
1379 return result;
1380 }
1381
1382 /* Return the section that should be marked against GC for a given
1383 relocation. */
1384
1385 static asection *
1386 mn10300_elf_gc_mark_hook (asection *sec,
1387 struct bfd_link_info *info,
1388 Elf_Internal_Rela *rel,
1389 struct elf_link_hash_entry *h,
1390 Elf_Internal_Sym *sym)
1391 {
1392 if (h != NULL)
1393 switch (ELF32_R_TYPE (rel->r_info))
1394 {
1395 case R_MN10300_GNU_VTINHERIT:
1396 case R_MN10300_GNU_VTENTRY:
1397 return NULL;
1398 }
1399
1400 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1401 }
1402
1403 /* Perform a relocation as part of a final link. */
1404
1405 static bfd_reloc_status_type
1406 mn10300_elf_final_link_relocate (reloc_howto_type *howto,
1407 bfd *input_bfd,
1408 bfd *output_bfd ATTRIBUTE_UNUSED,
1409 asection *input_section,
1410 bfd_byte *contents,
1411 bfd_vma offset,
1412 bfd_vma value,
1413 bfd_vma addend,
1414 struct elf_link_hash_entry * h,
1415 unsigned long symndx,
1416 struct bfd_link_info *info,
1417 asection *sym_sec ATTRIBUTE_UNUSED,
1418 int is_local ATTRIBUTE_UNUSED)
1419 {
1420 struct elf32_mn10300_link_hash_table * htab = elf32_mn10300_hash_table (info);
1421 static asection * sym_diff_section;
1422 static bfd_vma sym_diff_value;
1423 bfd_boolean is_sym_diff_reloc;
1424 unsigned long r_type = howto->type;
1425 bfd_byte * hit_data = contents + offset;
1426 bfd * dynobj;
1427 asection * sgot;
1428 asection * splt;
1429 asection * sreloc;
1430
1431 dynobj = elf_hash_table (info)->dynobj;
1432 sgot = NULL;
1433 splt = NULL;
1434 sreloc = NULL;
1435
1436 switch (r_type)
1437 {
1438 case R_MN10300_24:
1439 case R_MN10300_16:
1440 case R_MN10300_8:
1441 case R_MN10300_PCREL8:
1442 case R_MN10300_PCREL16:
1443 case R_MN10300_PCREL32:
1444 case R_MN10300_GOTOFF32:
1445 case R_MN10300_GOTOFF24:
1446 case R_MN10300_GOTOFF16:
1447 if (bfd_link_pic (info)
1448 && (input_section->flags & SEC_ALLOC) != 0
1449 && h != NULL
1450 && ! SYMBOL_REFERENCES_LOCAL (info, h))
1451 return bfd_reloc_dangerous;
1452 /* Fall through. */
1453 case R_MN10300_GOT32:
1454 /* Issue 2052223:
1455 Taking the address of a protected function in a shared library
1456 is illegal. Issue an error message here. */
1457 if (bfd_link_pic (info)
1458 && (input_section->flags & SEC_ALLOC) != 0
1459 && h != NULL
1460 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED
1461 && (h->type == STT_FUNC || h->type == STT_GNU_IFUNC)
1462 && ! SYMBOL_REFERENCES_LOCAL (info, h))
1463 return bfd_reloc_dangerous;
1464 }
1465
1466 is_sym_diff_reloc = FALSE;
1467 if (sym_diff_section != NULL)
1468 {
1469 BFD_ASSERT (sym_diff_section == input_section);
1470
1471 switch (r_type)
1472 {
1473 case R_MN10300_32:
1474 case R_MN10300_24:
1475 case R_MN10300_16:
1476 case R_MN10300_8:
1477 value -= sym_diff_value;
1478 /* If we are computing a 32-bit value for the location lists
1479 and the result is 0 then we add one to the value. A zero
1480 value can result because of linker relaxation deleteing
1481 prologue instructions and using a value of 1 (for the begin
1482 and end offsets in the location list entry) results in a
1483 nul entry which does not prevent the following entries from
1484 being parsed. */
1485 if (r_type == R_MN10300_32
1486 && value == 0
1487 && strcmp (input_section->name, ".debug_loc") == 0)
1488 value = 1;
1489 sym_diff_section = NULL;
1490 is_sym_diff_reloc = TRUE;
1491 break;
1492
1493 default:
1494 sym_diff_section = NULL;
1495 break;
1496 }
1497 }
1498
1499 switch (r_type)
1500 {
1501 case R_MN10300_SYM_DIFF:
1502 BFD_ASSERT (addend == 0);
1503 /* Cache the input section and value.
1504 The offset is unreliable, since relaxation may
1505 have reduced the following reloc's offset. */
1506 sym_diff_section = input_section;
1507 sym_diff_value = value;
1508 return bfd_reloc_ok;
1509
1510 case R_MN10300_ALIGN:
1511 case R_MN10300_NONE:
1512 return bfd_reloc_ok;
1513
1514 case R_MN10300_32:
1515 if (bfd_link_pic (info)
1516 /* Do not generate relocs when an R_MN10300_32 has been used
1517 with an R_MN10300_SYM_DIFF to compute a difference of two
1518 symbols. */
1519 && !is_sym_diff_reloc
1520 /* Also, do not generate a reloc when the symbol associated
1521 with the R_MN10300_32 reloc is absolute - there is no
1522 need for a run time computation in this case. */
1523 && sym_sec != bfd_abs_section_ptr
1524 /* If the section is not going to be allocated at load time
1525 then there is no need to generate relocs for it. */
1526 && (input_section->flags & SEC_ALLOC) != 0)
1527 {
1528 Elf_Internal_Rela outrel;
1529 bfd_boolean skip, relocate;
1530
1531 /* When generating a shared object, these relocations are
1532 copied into the output file to be resolved at run
1533 time. */
1534 if (sreloc == NULL)
1535 {
1536 sreloc = _bfd_elf_get_dynamic_reloc_section
1537 (input_bfd, input_section, /*rela?*/ TRUE);
1538 if (sreloc == NULL)
1539 return FALSE;
1540 }
1541
1542 skip = FALSE;
1543
1544 outrel.r_offset = _bfd_elf_section_offset (input_bfd, info,
1545 input_section, offset);
1546 if (outrel.r_offset == (bfd_vma) -1)
1547 skip = TRUE;
1548
1549 outrel.r_offset += (input_section->output_section->vma
1550 + input_section->output_offset);
1551
1552 if (skip)
1553 {
1554 memset (&outrel, 0, sizeof outrel);
1555 relocate = FALSE;
1556 }
1557 else
1558 {
1559 /* h->dynindx may be -1 if this symbol was marked to
1560 become local. */
1561 if (h == NULL
1562 || SYMBOL_REFERENCES_LOCAL (info, h))
1563 {
1564 relocate = TRUE;
1565 outrel.r_info = ELF32_R_INFO (0, R_MN10300_RELATIVE);
1566 outrel.r_addend = value + addend;
1567 }
1568 else
1569 {
1570 BFD_ASSERT (h->dynindx != -1);
1571 relocate = FALSE;
1572 outrel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_32);
1573 outrel.r_addend = value + addend;
1574 }
1575 }
1576
1577 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
1578 (bfd_byte *) (((Elf32_External_Rela *) sreloc->contents)
1579 + sreloc->reloc_count));
1580 ++sreloc->reloc_count;
1581
1582 /* If this reloc is against an external symbol, we do
1583 not want to fiddle with the addend. Otherwise, we
1584 need to include the symbol value so that it becomes
1585 an addend for the dynamic reloc. */
1586 if (! relocate)
1587 return bfd_reloc_ok;
1588 }
1589 value += addend;
1590 bfd_put_32 (input_bfd, value, hit_data);
1591 return bfd_reloc_ok;
1592
1593 case R_MN10300_24:
1594 value += addend;
1595
1596 if ((long) value > 0x7fffff || (long) value < -0x800000)
1597 return bfd_reloc_overflow;
1598
1599 bfd_put_8 (input_bfd, value & 0xff, hit_data);
1600 bfd_put_8 (input_bfd, (value >> 8) & 0xff, hit_data + 1);
1601 bfd_put_8 (input_bfd, (value >> 16) & 0xff, hit_data + 2);
1602 return bfd_reloc_ok;
1603
1604 case R_MN10300_16:
1605 value += addend;
1606
1607 if ((long) value > 0x7fff || (long) value < -0x8000)
1608 return bfd_reloc_overflow;
1609
1610 bfd_put_16 (input_bfd, value, hit_data);
1611 return bfd_reloc_ok;
1612
1613 case R_MN10300_8:
1614 value += addend;
1615
1616 if ((long) value > 0x7f || (long) value < -0x80)
1617 return bfd_reloc_overflow;
1618
1619 bfd_put_8 (input_bfd, value, hit_data);
1620 return bfd_reloc_ok;
1621
1622 case R_MN10300_PCREL8:
1623 value -= (input_section->output_section->vma
1624 + input_section->output_offset);
1625 value -= offset;
1626 value += addend;
1627
1628 if ((long) value > 0x7f || (long) value < -0x80)
1629 return bfd_reloc_overflow;
1630
1631 bfd_put_8 (input_bfd, value, hit_data);
1632 return bfd_reloc_ok;
1633
1634 case R_MN10300_PCREL16:
1635 value -= (input_section->output_section->vma
1636 + input_section->output_offset);
1637 value -= offset;
1638 value += addend;
1639
1640 if ((long) value > 0x7fff || (long) value < -0x8000)
1641 return bfd_reloc_overflow;
1642
1643 bfd_put_16 (input_bfd, value, hit_data);
1644 return bfd_reloc_ok;
1645
1646 case R_MN10300_PCREL32:
1647 value -= (input_section->output_section->vma
1648 + input_section->output_offset);
1649 value -= offset;
1650 value += addend;
1651
1652 bfd_put_32 (input_bfd, value, hit_data);
1653 return bfd_reloc_ok;
1654
1655 case R_MN10300_GNU_VTINHERIT:
1656 case R_MN10300_GNU_VTENTRY:
1657 return bfd_reloc_ok;
1658
1659 case R_MN10300_GOTPC32:
1660 if (dynobj == NULL)
1661 return bfd_reloc_dangerous;
1662
1663 /* Use global offset table as symbol value. */
1664 value = htab->root.sgot->output_section->vma;
1665 value -= (input_section->output_section->vma
1666 + input_section->output_offset);
1667 value -= offset;
1668 value += addend;
1669
1670 bfd_put_32 (input_bfd, value, hit_data);
1671 return bfd_reloc_ok;
1672
1673 case R_MN10300_GOTPC16:
1674 if (dynobj == NULL)
1675 return bfd_reloc_dangerous;
1676
1677 /* Use global offset table as symbol value. */
1678 value = htab->root.sgot->output_section->vma;
1679 value -= (input_section->output_section->vma
1680 + input_section->output_offset);
1681 value -= offset;
1682 value += addend;
1683
1684 if ((long) value > 0x7fff || (long) value < -0x8000)
1685 return bfd_reloc_overflow;
1686
1687 bfd_put_16 (input_bfd, value, hit_data);
1688 return bfd_reloc_ok;
1689
1690 case R_MN10300_GOTOFF32:
1691 if (dynobj == NULL)
1692 return bfd_reloc_dangerous;
1693
1694 value -= htab->root.sgot->output_section->vma;
1695 value += addend;
1696
1697 bfd_put_32 (input_bfd, value, hit_data);
1698 return bfd_reloc_ok;
1699
1700 case R_MN10300_GOTOFF24:
1701 if (dynobj == NULL)
1702 return bfd_reloc_dangerous;
1703
1704 value -= htab->root.sgot->output_section->vma;
1705 value += addend;
1706
1707 if ((long) value > 0x7fffff || (long) value < -0x800000)
1708 return bfd_reloc_overflow;
1709
1710 bfd_put_8 (input_bfd, value, hit_data);
1711 bfd_put_8 (input_bfd, (value >> 8) & 0xff, hit_data + 1);
1712 bfd_put_8 (input_bfd, (value >> 16) & 0xff, hit_data + 2);
1713 return bfd_reloc_ok;
1714
1715 case R_MN10300_GOTOFF16:
1716 if (dynobj == NULL)
1717 return bfd_reloc_dangerous;
1718
1719 value -= htab->root.sgot->output_section->vma;
1720 value += addend;
1721
1722 if ((long) value > 0x7fff || (long) value < -0x8000)
1723 return bfd_reloc_overflow;
1724
1725 bfd_put_16 (input_bfd, value, hit_data);
1726 return bfd_reloc_ok;
1727
1728 case R_MN10300_PLT32:
1729 if (h != NULL
1730 && ELF_ST_VISIBILITY (h->other) != STV_INTERNAL
1731 && ELF_ST_VISIBILITY (h->other) != STV_HIDDEN
1732 && h->plt.offset != (bfd_vma) -1)
1733 {
1734 if (dynobj == NULL)
1735 return bfd_reloc_dangerous;
1736
1737 splt = htab->root.splt;
1738 value = (splt->output_section->vma
1739 + splt->output_offset
1740 + h->plt.offset) - value;
1741 }
1742
1743 value -= (input_section->output_section->vma
1744 + input_section->output_offset);
1745 value -= offset;
1746 value += addend;
1747
1748 bfd_put_32 (input_bfd, value, hit_data);
1749 return bfd_reloc_ok;
1750
1751 case R_MN10300_PLT16:
1752 if (h != NULL
1753 && ELF_ST_VISIBILITY (h->other) != STV_INTERNAL
1754 && ELF_ST_VISIBILITY (h->other) != STV_HIDDEN
1755 && h->plt.offset != (bfd_vma) -1)
1756 {
1757 if (dynobj == NULL)
1758 return bfd_reloc_dangerous;
1759
1760 splt = htab->root.splt;
1761 value = (splt->output_section->vma
1762 + splt->output_offset
1763 + h->plt.offset) - value;
1764 }
1765
1766 value -= (input_section->output_section->vma
1767 + input_section->output_offset);
1768 value -= offset;
1769 value += addend;
1770
1771 if ((long) value > 0x7fff || (long) value < -0x8000)
1772 return bfd_reloc_overflow;
1773
1774 bfd_put_16 (input_bfd, value, hit_data);
1775 return bfd_reloc_ok;
1776
1777 case R_MN10300_TLS_LDO:
1778 value = dtpoff (info, value);
1779 bfd_put_32 (input_bfd, value + addend, hit_data);
1780 return bfd_reloc_ok;
1781
1782 case R_MN10300_TLS_LE:
1783 value = tpoff (info, value);
1784 bfd_put_32 (input_bfd, value + addend, hit_data);
1785 return bfd_reloc_ok;
1786
1787 case R_MN10300_TLS_LD:
1788 if (dynobj == NULL)
1789 return bfd_reloc_dangerous;
1790
1791 sgot = htab->root.sgot;
1792 BFD_ASSERT (sgot != NULL);
1793 value = htab->tls_ldm_got.offset + sgot->output_offset;
1794 bfd_put_32 (input_bfd, value, hit_data);
1795
1796 if (!htab->tls_ldm_got.rel_emitted)
1797 {
1798 asection *srelgot = htab->root.srelgot;
1799 Elf_Internal_Rela rel;
1800
1801 BFD_ASSERT (srelgot != NULL);
1802 htab->tls_ldm_got.rel_emitted ++;
1803 rel.r_offset = (sgot->output_section->vma
1804 + sgot->output_offset
1805 + htab->tls_ldm_got.offset);
1806 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + htab->tls_ldm_got.offset);
1807 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + htab->tls_ldm_got.offset+4);
1808 rel.r_info = ELF32_R_INFO (0, R_MN10300_TLS_DTPMOD);
1809 rel.r_addend = 0;
1810 bfd_elf32_swap_reloca_out (output_bfd, & rel,
1811 (bfd_byte *) ((Elf32_External_Rela *) srelgot->contents
1812 + srelgot->reloc_count));
1813 ++ srelgot->reloc_count;
1814 }
1815
1816 return bfd_reloc_ok;
1817
1818 case R_MN10300_TLS_GOTIE:
1819 value = tpoff (info, value);
1820 /* Fall Through. */
1821
1822 case R_MN10300_TLS_GD:
1823 case R_MN10300_TLS_IE:
1824 case R_MN10300_GOT32:
1825 case R_MN10300_GOT24:
1826 case R_MN10300_GOT16:
1827 if (dynobj == NULL)
1828 return bfd_reloc_dangerous;
1829
1830 sgot = htab->root.sgot;
1831 if (r_type == R_MN10300_TLS_GD)
1832 value = dtpoff (info, value);
1833
1834 if (h != NULL)
1835 {
1836 bfd_vma off;
1837
1838 off = h->got.offset;
1839 /* Offsets in the GOT are allocated in check_relocs
1840 which is not called for shared libraries... */
1841 if (off == (bfd_vma) -1)
1842 off = 0;
1843
1844 if (sgot->contents != NULL
1845 && (! elf_hash_table (info)->dynamic_sections_created
1846 || SYMBOL_REFERENCES_LOCAL (info, h)))
1847 /* This is actually a static link, or it is a
1848 -Bsymbolic link and the symbol is defined
1849 locally, or the symbol was forced to be local
1850 because of a version file. We must initialize
1851 this entry in the global offset table.
1852
1853 When doing a dynamic link, we create a .rela.got
1854 relocation entry to initialize the value. This
1855 is done in the finish_dynamic_symbol routine. */
1856 bfd_put_32 (output_bfd, value,
1857 sgot->contents + off);
1858
1859 value = sgot->output_offset + off;
1860 }
1861 else
1862 {
1863 bfd_vma off;
1864
1865 off = elf_local_got_offsets (input_bfd)[symndx];
1866
1867 if (off & 1)
1868 bfd_put_32 (output_bfd, value, sgot->contents + (off & ~ 1));
1869 else
1870 {
1871 bfd_put_32 (output_bfd, value, sgot->contents + off);
1872
1873 if (bfd_link_pic (info))
1874 {
1875 asection *srelgot = htab->root.srelgot;;
1876 Elf_Internal_Rela outrel;
1877
1878 BFD_ASSERT (srelgot != NULL);
1879
1880 outrel.r_offset = (sgot->output_section->vma
1881 + sgot->output_offset
1882 + off);
1883 switch (r_type)
1884 {
1885 case R_MN10300_TLS_GD:
1886 outrel.r_info = ELF32_R_INFO (0, R_MN10300_TLS_DTPOFF);
1887 outrel.r_offset = (sgot->output_section->vma
1888 + sgot->output_offset
1889 + off + 4);
1890 bfd_elf32_swap_reloca_out (output_bfd, & outrel,
1891 (bfd_byte *) (((Elf32_External_Rela *)
1892 srelgot->contents)
1893 + srelgot->reloc_count));
1894 ++ srelgot->reloc_count;
1895 outrel.r_info = ELF32_R_INFO (0, R_MN10300_TLS_DTPMOD);
1896 break;
1897 case R_MN10300_TLS_GOTIE:
1898 case R_MN10300_TLS_IE:
1899 outrel.r_info = ELF32_R_INFO (0, R_MN10300_TLS_TPOFF);
1900 break;
1901 default:
1902 outrel.r_info = ELF32_R_INFO (0, R_MN10300_RELATIVE);
1903 break;
1904 }
1905
1906 outrel.r_addend = value;
1907 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
1908 (bfd_byte *) (((Elf32_External_Rela *)
1909 srelgot->contents)
1910 + srelgot->reloc_count));
1911 ++ srelgot->reloc_count;
1912 elf_local_got_offsets (input_bfd)[symndx] |= 1;
1913 }
1914
1915 value = sgot->output_offset + (off & ~(bfd_vma) 1);
1916 }
1917 }
1918
1919 value += addend;
1920
1921 if (r_type == R_MN10300_TLS_IE)
1922 {
1923 value += sgot->output_section->vma;
1924 bfd_put_32 (input_bfd, value, hit_data);
1925 return bfd_reloc_ok;
1926 }
1927 else if (r_type == R_MN10300_TLS_GOTIE
1928 || r_type == R_MN10300_TLS_GD
1929 || r_type == R_MN10300_TLS_LD)
1930 {
1931 bfd_put_32 (input_bfd, value, hit_data);
1932 return bfd_reloc_ok;
1933 }
1934 else if (r_type == R_MN10300_GOT32)
1935 {
1936 bfd_put_32 (input_bfd, value, hit_data);
1937 return bfd_reloc_ok;
1938 }
1939 else if (r_type == R_MN10300_GOT24)
1940 {
1941 if ((long) value > 0x7fffff || (long) value < -0x800000)
1942 return bfd_reloc_overflow;
1943
1944 bfd_put_8 (input_bfd, value & 0xff, hit_data);
1945 bfd_put_8 (input_bfd, (value >> 8) & 0xff, hit_data + 1);
1946 bfd_put_8 (input_bfd, (value >> 16) & 0xff, hit_data + 2);
1947 return bfd_reloc_ok;
1948 }
1949 else if (r_type == R_MN10300_GOT16)
1950 {
1951 if ((long) value > 0x7fff || (long) value < -0x8000)
1952 return bfd_reloc_overflow;
1953
1954 bfd_put_16 (input_bfd, value, hit_data);
1955 return bfd_reloc_ok;
1956 }
1957 /* Fall through. */
1958
1959 default:
1960 return bfd_reloc_notsupported;
1961 }
1962 }
1963 \f
1964 /* Relocate an MN10300 ELF section. */
1965
1966 static bfd_boolean
1967 mn10300_elf_relocate_section (bfd *output_bfd,
1968 struct bfd_link_info *info,
1969 bfd *input_bfd,
1970 asection *input_section,
1971 bfd_byte *contents,
1972 Elf_Internal_Rela *relocs,
1973 Elf_Internal_Sym *local_syms,
1974 asection **local_sections)
1975 {
1976 Elf_Internal_Shdr *symtab_hdr;
1977 struct elf_link_hash_entry **sym_hashes;
1978 Elf_Internal_Rela *rel, *relend;
1979 Elf_Internal_Rela * trel;
1980
1981 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1982 sym_hashes = elf_sym_hashes (input_bfd);
1983
1984 rel = relocs;
1985 relend = relocs + input_section->reloc_count;
1986 for (; rel < relend; rel++)
1987 {
1988 int r_type;
1989 reloc_howto_type *howto;
1990 unsigned long r_symndx;
1991 Elf_Internal_Sym *sym;
1992 asection *sec;
1993 struct elf32_mn10300_link_hash_entry *h;
1994 bfd_vma relocation;
1995 bfd_reloc_status_type r;
1996 int tls_r_type;
1997 bfd_boolean unresolved_reloc = FALSE;
1998 bfd_boolean warned, ignored;
1999 struct elf_link_hash_entry * hh;
2000
2001 relocation = 0;
2002 r_symndx = ELF32_R_SYM (rel->r_info);
2003 r_type = ELF32_R_TYPE (rel->r_info);
2004 howto = elf_mn10300_howto_table + r_type;
2005
2006 /* Just skip the vtable gc relocs. */
2007 if (r_type == R_MN10300_GNU_VTINHERIT
2008 || r_type == R_MN10300_GNU_VTENTRY)
2009 continue;
2010
2011 h = NULL;
2012 sym = NULL;
2013 sec = NULL;
2014 if (r_symndx < symtab_hdr->sh_info)
2015 hh = NULL;
2016 else
2017 {
2018 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2019 r_symndx, symtab_hdr, sym_hashes,
2020 hh, sec, relocation,
2021 unresolved_reloc, warned, ignored);
2022 }
2023 h = elf_mn10300_hash_entry (hh);
2024
2025 tls_r_type = elf_mn10300_tls_transition (info, r_type, hh, input_section, 0);
2026 if (tls_r_type != r_type)
2027 {
2028 bfd_boolean had_plt;
2029
2030 had_plt = mn10300_do_tls_transition (input_bfd, r_type, tls_r_type,
2031 contents, rel->r_offset);
2032 r_type = tls_r_type;
2033 howto = elf_mn10300_howto_table + r_type;
2034
2035 if (had_plt)
2036 for (trel = rel+1; trel < relend; trel++)
2037 if ((ELF32_R_TYPE (trel->r_info) == R_MN10300_PLT32
2038 || ELF32_R_TYPE (trel->r_info) == R_MN10300_PCREL32)
2039 && rel->r_offset + had_plt == trel->r_offset)
2040 trel->r_info = ELF32_R_INFO (0, R_MN10300_NONE);
2041 }
2042
2043 if (r_symndx < symtab_hdr->sh_info)
2044 {
2045 sym = local_syms + r_symndx;
2046 sec = local_sections[r_symndx];
2047 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2048 }
2049 else
2050 {
2051 if ((h->root.root.type == bfd_link_hash_defined
2052 || h->root.root.type == bfd_link_hash_defweak)
2053 && ( r_type == R_MN10300_GOTPC32
2054 || r_type == R_MN10300_GOTPC16
2055 || (( r_type == R_MN10300_PLT32
2056 || r_type == R_MN10300_PLT16)
2057 && ELF_ST_VISIBILITY (h->root.other) != STV_INTERNAL
2058 && ELF_ST_VISIBILITY (h->root.other) != STV_HIDDEN
2059 && h->root.plt.offset != (bfd_vma) -1)
2060 || (( r_type == R_MN10300_GOT32
2061 || r_type == R_MN10300_GOT24
2062 || r_type == R_MN10300_TLS_GD
2063 || r_type == R_MN10300_TLS_LD
2064 || r_type == R_MN10300_TLS_GOTIE
2065 || r_type == R_MN10300_TLS_IE
2066 || r_type == R_MN10300_GOT16)
2067 && elf_hash_table (info)->dynamic_sections_created
2068 && !SYMBOL_REFERENCES_LOCAL (info, hh))
2069 || (r_type == R_MN10300_32
2070 && !SYMBOL_REFERENCES_LOCAL (info, hh)
2071 /* _32 relocs in executables force _COPY relocs,
2072 such that the address of the symbol ends up
2073 being local. */
2074 && (((input_section->flags & SEC_ALLOC) != 0
2075 && !bfd_link_executable (info))
2076 /* DWARF will emit R_MN10300_32 relocations
2077 in its sections against symbols defined
2078 externally in shared libraries. We can't
2079 do anything with them here. */
2080 || ((input_section->flags & SEC_DEBUGGING) != 0
2081 && h->root.def_dynamic)))))
2082 /* In these cases, we don't need the relocation
2083 value. We check specially because in some
2084 obscure cases sec->output_section will be NULL. */
2085 relocation = 0;
2086
2087 else if (!bfd_link_relocatable (info) && unresolved_reloc
2088 && _bfd_elf_section_offset (output_bfd, info, input_section,
2089 rel->r_offset) != (bfd_vma) -1)
2090
2091 _bfd_error_handler
2092 /* xgettext:c-format */
2093 (_("%pB(%pA+%#" PRIx64 "): "
2094 "unresolvable %s relocation against symbol `%s'"),
2095 input_bfd,
2096 input_section,
2097 (uint64_t) rel->r_offset,
2098 howto->name,
2099 h->root.root.root.string);
2100 }
2101
2102 if (sec != NULL && discarded_section (sec))
2103 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2104 rel, 1, relend, howto, 0, contents);
2105
2106 if (bfd_link_relocatable (info))
2107 continue;
2108
2109 r = mn10300_elf_final_link_relocate (howto, input_bfd, output_bfd,
2110 input_section,
2111 contents, rel->r_offset,
2112 relocation, rel->r_addend,
2113 (struct elf_link_hash_entry *) h,
2114 r_symndx,
2115 info, sec, h == NULL);
2116
2117 if (r != bfd_reloc_ok)
2118 {
2119 const char *name;
2120 const char *msg = NULL;
2121
2122 if (h != NULL)
2123 name = h->root.root.root.string;
2124 else
2125 {
2126 name = (bfd_elf_string_from_elf_section
2127 (input_bfd, symtab_hdr->sh_link, sym->st_name));
2128 if (name == NULL || *name == '\0')
2129 name = bfd_section_name (sec);
2130 }
2131
2132 switch (r)
2133 {
2134 case bfd_reloc_overflow:
2135 (*info->callbacks->reloc_overflow)
2136 (info, (h ? &h->root.root : NULL), name, howto->name,
2137 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
2138 break;
2139
2140 case bfd_reloc_undefined:
2141 (*info->callbacks->undefined_symbol)
2142 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
2143 break;
2144
2145 case bfd_reloc_outofrange:
2146 msg = _("internal error: out of range error");
2147 goto common_error;
2148
2149 case bfd_reloc_notsupported:
2150 msg = _("internal error: unsupported relocation error");
2151 goto common_error;
2152
2153 case bfd_reloc_dangerous:
2154 if (r_type == R_MN10300_PCREL32)
2155 msg = _("error: inappropriate relocation type for shared"
2156 " library (did you forget -fpic?)");
2157 else if (r_type == R_MN10300_GOT32)
2158 /* xgettext:c-format */
2159 msg = _("%pB: taking the address of protected function"
2160 " '%s' cannot be done when making a shared library");
2161 else
2162 msg = _("internal error: suspicious relocation type used"
2163 " in shared library");
2164 goto common_error;
2165
2166 default:
2167 msg = _("internal error: unknown error");
2168 /* Fall through. */
2169
2170 common_error:
2171 _bfd_error_handler (msg, input_bfd, name);
2172 bfd_set_error (bfd_error_bad_value);
2173 return FALSE;
2174 }
2175 }
2176 }
2177
2178 return TRUE;
2179 }
2180
2181 /* Finish initializing one hash table entry. */
2182
2183 static bfd_boolean
2184 elf32_mn10300_finish_hash_table_entry (struct bfd_hash_entry *gen_entry,
2185 void * in_args)
2186 {
2187 struct elf32_mn10300_link_hash_entry *entry;
2188 struct bfd_link_info *link_info = (struct bfd_link_info *) in_args;
2189 unsigned int byte_count = 0;
2190
2191 entry = (struct elf32_mn10300_link_hash_entry *) gen_entry;
2192
2193 /* If we already know we want to convert "call" to "calls" for calls
2194 to this symbol, then return now. */
2195 if (entry->flags == MN10300_CONVERT_CALL_TO_CALLS)
2196 return TRUE;
2197
2198 /* If there are no named calls to this symbol, or there's nothing we
2199 can move from the function itself into the "call" instruction,
2200 then note that all "call" instructions should be converted into
2201 "calls" instructions and return. If a symbol is available for
2202 dynamic symbol resolution (overridable or overriding), avoid
2203 custom calling conventions. */
2204 if (entry->direct_calls == 0
2205 || (entry->stack_size == 0 && entry->movm_args == 0)
2206 || (elf_hash_table (link_info)->dynamic_sections_created
2207 && ELF_ST_VISIBILITY (entry->root.other) != STV_INTERNAL
2208 && ELF_ST_VISIBILITY (entry->root.other) != STV_HIDDEN))
2209 {
2210 /* Make a note that we should convert "call" instructions to "calls"
2211 instructions for calls to this symbol. */
2212 entry->flags |= MN10300_CONVERT_CALL_TO_CALLS;
2213 return TRUE;
2214 }
2215
2216 /* We may be able to move some instructions from the function itself into
2217 the "call" instruction. Count how many bytes we might be able to
2218 eliminate in the function itself. */
2219
2220 /* A movm instruction is two bytes. */
2221 if (entry->movm_args)
2222 byte_count += 2;
2223
2224 /* Count the insn to allocate stack space too. */
2225 if (entry->stack_size > 0)
2226 {
2227 if (entry->stack_size <= 128)
2228 byte_count += 3;
2229 else
2230 byte_count += 4;
2231 }
2232
2233 /* If using "call" will result in larger code, then turn all
2234 the associated "call" instructions into "calls" instructions. */
2235 if (byte_count < entry->direct_calls)
2236 entry->flags |= MN10300_CONVERT_CALL_TO_CALLS;
2237
2238 /* This routine never fails. */
2239 return TRUE;
2240 }
2241
2242 /* Used to count hash table entries. */
2243
2244 static bfd_boolean
2245 elf32_mn10300_count_hash_table_entries (struct bfd_hash_entry *gen_entry ATTRIBUTE_UNUSED,
2246 void * in_args)
2247 {
2248 int *count = (int *) in_args;
2249
2250 (*count) ++;
2251 return TRUE;
2252 }
2253
2254 /* Used to enumerate hash table entries into a linear array. */
2255
2256 static bfd_boolean
2257 elf32_mn10300_list_hash_table_entries (struct bfd_hash_entry *gen_entry,
2258 void * in_args)
2259 {
2260 struct bfd_hash_entry ***ptr = (struct bfd_hash_entry ***) in_args;
2261
2262 **ptr = gen_entry;
2263 (*ptr) ++;
2264 return TRUE;
2265 }
2266
2267 /* Used to sort the array created by the above. */
2268
2269 static int
2270 sort_by_value (const void *va, const void *vb)
2271 {
2272 struct elf32_mn10300_link_hash_entry *a
2273 = *(struct elf32_mn10300_link_hash_entry **) va;
2274 struct elf32_mn10300_link_hash_entry *b
2275 = *(struct elf32_mn10300_link_hash_entry **) vb;
2276
2277 return a->value - b->value;
2278 }
2279
2280 /* Compute the stack size and movm arguments for the function
2281 referred to by HASH at address ADDR in section with
2282 contents CONTENTS, store the information in the hash table. */
2283
2284 static void
2285 compute_function_info (bfd *abfd,
2286 struct elf32_mn10300_link_hash_entry *hash,
2287 bfd_vma addr,
2288 unsigned char *contents)
2289 {
2290 unsigned char byte1, byte2;
2291 /* We only care about a very small subset of the possible prologue
2292 sequences here. Basically we look for:
2293
2294 movm [d2,d3,a2,a3],sp (optional)
2295 add <size>,sp (optional, and only for sizes which fit in an unsigned
2296 8 bit number)
2297
2298 If we find anything else, we quit. */
2299
2300 /* Look for movm [regs],sp. */
2301 byte1 = bfd_get_8 (abfd, contents + addr);
2302 byte2 = bfd_get_8 (abfd, contents + addr + 1);
2303
2304 if (byte1 == 0xcf)
2305 {
2306 hash->movm_args = byte2;
2307 addr += 2;
2308 byte1 = bfd_get_8 (abfd, contents + addr);
2309 byte2 = bfd_get_8 (abfd, contents + addr + 1);
2310 }
2311
2312 /* Now figure out how much stack space will be allocated by the movm
2313 instruction. We need this kept separate from the function's normal
2314 stack space. */
2315 if (hash->movm_args)
2316 {
2317 /* Space for d2. */
2318 if (hash->movm_args & 0x80)
2319 hash->movm_stack_size += 4;
2320
2321 /* Space for d3. */
2322 if (hash->movm_args & 0x40)
2323 hash->movm_stack_size += 4;
2324
2325 /* Space for a2. */
2326 if (hash->movm_args & 0x20)
2327 hash->movm_stack_size += 4;
2328
2329 /* Space for a3. */
2330 if (hash->movm_args & 0x10)
2331 hash->movm_stack_size += 4;
2332
2333 /* "other" space. d0, d1, a0, a1, mdr, lir, lar, 4 byte pad. */
2334 if (hash->movm_args & 0x08)
2335 hash->movm_stack_size += 8 * 4;
2336
2337 if (bfd_get_mach (abfd) == bfd_mach_am33
2338 || bfd_get_mach (abfd) == bfd_mach_am33_2)
2339 {
2340 /* "exother" space. e0, e1, mdrq, mcrh, mcrl, mcvf */
2341 if (hash->movm_args & 0x1)
2342 hash->movm_stack_size += 6 * 4;
2343
2344 /* exreg1 space. e4, e5, e6, e7 */
2345 if (hash->movm_args & 0x2)
2346 hash->movm_stack_size += 4 * 4;
2347
2348 /* exreg0 space. e2, e3 */
2349 if (hash->movm_args & 0x4)
2350 hash->movm_stack_size += 2 * 4;
2351 }
2352 }
2353
2354 /* Now look for the two stack adjustment variants. */
2355 if (byte1 == 0xf8 && byte2 == 0xfe)
2356 {
2357 int temp = bfd_get_8 (abfd, contents + addr + 2);
2358 temp = ((temp & 0xff) ^ (~0x7f)) + 0x80;
2359
2360 hash->stack_size = -temp;
2361 }
2362 else if (byte1 == 0xfa && byte2 == 0xfe)
2363 {
2364 int temp = bfd_get_16 (abfd, contents + addr + 2);
2365 temp = ((temp & 0xffff) ^ (~0x7fff)) + 0x8000;
2366 temp = -temp;
2367
2368 if (temp < 255)
2369 hash->stack_size = temp;
2370 }
2371
2372 /* If the total stack to be allocated by the call instruction is more
2373 than 255 bytes, then we can't remove the stack adjustment by using
2374 "call" (we might still be able to remove the "movm" instruction. */
2375 if (hash->stack_size + hash->movm_stack_size > 255)
2376 hash->stack_size = 0;
2377 }
2378
2379 /* Delete some bytes from a section while relaxing. */
2380
2381 static bfd_boolean
2382 mn10300_elf_relax_delete_bytes (bfd *abfd,
2383 asection *sec,
2384 bfd_vma addr,
2385 int count)
2386 {
2387 Elf_Internal_Shdr *symtab_hdr;
2388 unsigned int sec_shndx;
2389 bfd_byte *contents;
2390 Elf_Internal_Rela *irel, *irelend;
2391 Elf_Internal_Rela *irelalign;
2392 bfd_vma toaddr;
2393 Elf_Internal_Sym *isym, *isymend;
2394 struct elf_link_hash_entry **sym_hashes;
2395 struct elf_link_hash_entry **end_hashes;
2396 unsigned int symcount;
2397
2398 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
2399
2400 contents = elf_section_data (sec)->this_hdr.contents;
2401
2402 irelalign = NULL;
2403 toaddr = sec->size;
2404
2405 irel = elf_section_data (sec)->relocs;
2406 irelend = irel + sec->reloc_count;
2407
2408 if (sec->reloc_count > 0)
2409 {
2410 /* If there is an align reloc at the end of the section ignore it.
2411 GAS creates these relocs for reasons of its own, and they just
2412 serve to keep the section artifically inflated. */
2413 if (ELF32_R_TYPE ((irelend - 1)->r_info) == (int) R_MN10300_ALIGN)
2414 --irelend;
2415
2416 /* The deletion must stop at the next ALIGN reloc for an alignment
2417 power larger than, or not a multiple of, the number of bytes we
2418 are deleting. */
2419 for (; irel < irelend; irel++)
2420 {
2421 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_ALIGN
2422 && irel->r_offset > addr
2423 && irel->r_offset < toaddr)
2424 {
2425 int alignment = 1 << irel->r_addend;
2426
2427 if (count < alignment
2428 || alignment % count != 0)
2429 {
2430 irelalign = irel;
2431 toaddr = irel->r_offset;
2432 break;
2433 }
2434 }
2435 }
2436 }
2437
2438 /* Actually delete the bytes. */
2439 memmove (contents + addr, contents + addr + count,
2440 (size_t) (toaddr - addr - count));
2441
2442 /* Adjust the section's size if we are shrinking it, or else
2443 pad the bytes between the end of the shrunken region and
2444 the start of the next region with NOP codes. */
2445 if (irelalign == NULL)
2446 {
2447 sec->size -= count;
2448 /* Include symbols at the end of the section, but
2449 not at the end of a sub-region of the section. */
2450 toaddr ++;
2451 }
2452 else
2453 {
2454 int i;
2455
2456 #define NOP_OPCODE 0xcb
2457
2458 for (i = 0; i < count; i ++)
2459 bfd_put_8 (abfd, (bfd_vma) NOP_OPCODE, contents + toaddr - count + i);
2460 }
2461
2462 /* Adjust all the relocs. */
2463 for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
2464 {
2465 /* Get the new reloc address. */
2466 if ((irel->r_offset > addr
2467 && irel->r_offset < toaddr)
2468 || (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_ALIGN
2469 && irel->r_offset == toaddr))
2470 irel->r_offset -= count;
2471 }
2472
2473 /* Adjust the local symbols in the section, reducing their value
2474 by the number of bytes deleted. Note - symbols within the deleted
2475 region are moved to the address of the start of the region, which
2476 actually means that they will address the byte beyond the end of
2477 the region once the deletion has been completed. */
2478 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2479 isym = (Elf_Internal_Sym *) symtab_hdr->contents;
2480 for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
2481 {
2482 if (isym->st_shndx == sec_shndx
2483 && isym->st_value > addr
2484 && isym->st_value < toaddr)
2485 {
2486 if (isym->st_value < addr + count)
2487 isym->st_value = addr;
2488 else
2489 isym->st_value -= count;
2490 }
2491 /* Adjust the function symbol's size as well. */
2492 else if (isym->st_shndx == sec_shndx
2493 && ELF_ST_TYPE (isym->st_info) == STT_FUNC
2494 && isym->st_value + isym->st_size > addr
2495 && isym->st_value + isym->st_size < toaddr)
2496 isym->st_size -= count;
2497 }
2498
2499 /* Now adjust the global symbols defined in this section. */
2500 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
2501 - symtab_hdr->sh_info);
2502 sym_hashes = elf_sym_hashes (abfd);
2503 end_hashes = sym_hashes + symcount;
2504 for (; sym_hashes < end_hashes; sym_hashes++)
2505 {
2506 struct elf_link_hash_entry *sym_hash = *sym_hashes;
2507
2508 if ((sym_hash->root.type == bfd_link_hash_defined
2509 || sym_hash->root.type == bfd_link_hash_defweak)
2510 && sym_hash->root.u.def.section == sec
2511 && sym_hash->root.u.def.value > addr
2512 && sym_hash->root.u.def.value < toaddr)
2513 {
2514 if (sym_hash->root.u.def.value < addr + count)
2515 sym_hash->root.u.def.value = addr;
2516 else
2517 sym_hash->root.u.def.value -= count;
2518 }
2519 /* Adjust the function symbol's size as well. */
2520 else if (sym_hash->root.type == bfd_link_hash_defined
2521 && sym_hash->root.u.def.section == sec
2522 && sym_hash->type == STT_FUNC
2523 && sym_hash->root.u.def.value + sym_hash->size > addr
2524 && sym_hash->root.u.def.value + sym_hash->size < toaddr)
2525 sym_hash->size -= count;
2526 }
2527
2528 /* See if we can move the ALIGN reloc forward.
2529 We have adjusted r_offset for it already. */
2530 if (irelalign != NULL)
2531 {
2532 bfd_vma alignto, alignaddr;
2533
2534 if ((int) irelalign->r_addend > 0)
2535 {
2536 /* This is the old address. */
2537 alignto = BFD_ALIGN (toaddr, 1 << irelalign->r_addend);
2538 /* This is where the align points to now. */
2539 alignaddr = BFD_ALIGN (irelalign->r_offset,
2540 1 << irelalign->r_addend);
2541 if (alignaddr < alignto)
2542 /* Tail recursion. */
2543 return mn10300_elf_relax_delete_bytes (abfd, sec, alignaddr,
2544 (int) (alignto - alignaddr));
2545 }
2546 }
2547
2548 return TRUE;
2549 }
2550
2551 /* Return TRUE if a symbol exists at the given address, else return
2552 FALSE. */
2553
2554 static bfd_boolean
2555 mn10300_elf_symbol_address_p (bfd *abfd,
2556 asection *sec,
2557 Elf_Internal_Sym *isym,
2558 bfd_vma addr)
2559 {
2560 Elf_Internal_Shdr *symtab_hdr;
2561 unsigned int sec_shndx;
2562 Elf_Internal_Sym *isymend;
2563 struct elf_link_hash_entry **sym_hashes;
2564 struct elf_link_hash_entry **end_hashes;
2565 unsigned int symcount;
2566
2567 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
2568
2569 /* Examine all the symbols. */
2570 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2571 for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
2572 if (isym->st_shndx == sec_shndx
2573 && isym->st_value == addr)
2574 return TRUE;
2575
2576 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
2577 - symtab_hdr->sh_info);
2578 sym_hashes = elf_sym_hashes (abfd);
2579 end_hashes = sym_hashes + symcount;
2580 for (; sym_hashes < end_hashes; sym_hashes++)
2581 {
2582 struct elf_link_hash_entry *sym_hash = *sym_hashes;
2583
2584 if ((sym_hash->root.type == bfd_link_hash_defined
2585 || sym_hash->root.type == bfd_link_hash_defweak)
2586 && sym_hash->root.u.def.section == sec
2587 && sym_hash->root.u.def.value == addr)
2588 return TRUE;
2589 }
2590
2591 return FALSE;
2592 }
2593
2594 /* This function handles relaxing for the mn10300.
2595
2596 There are quite a few relaxing opportunities available on the mn10300:
2597
2598 * calls:32 -> calls:16 2 bytes
2599 * call:32 -> call:16 2 bytes
2600
2601 * call:32 -> calls:32 1 byte
2602 * call:16 -> calls:16 1 byte
2603 * These are done anytime using "calls" would result
2604 in smaller code, or when necessary to preserve the
2605 meaning of the program.
2606
2607 * call:32 varies
2608 * call:16
2609 * In some circumstances we can move instructions
2610 from a function prologue into a "call" instruction.
2611 This is only done if the resulting code is no larger
2612 than the original code.
2613
2614 * jmp:32 -> jmp:16 2 bytes
2615 * jmp:16 -> bra:8 1 byte
2616
2617 * If the previous instruction is a conditional branch
2618 around the jump/bra, we may be able to reverse its condition
2619 and change its target to the jump's target. The jump/bra
2620 can then be deleted. 2 bytes
2621
2622 * mov abs32 -> mov abs16 1 or 2 bytes
2623
2624 * Most instructions which accept imm32 can relax to imm16 1 or 2 bytes
2625 - Most instructions which accept imm16 can relax to imm8 1 or 2 bytes
2626
2627 * Most instructions which accept d32 can relax to d16 1 or 2 bytes
2628 - Most instructions which accept d16 can relax to d8 1 or 2 bytes
2629
2630 We don't handle imm16->imm8 or d16->d8 as they're very rare
2631 and somewhat more difficult to support. */
2632
2633 static bfd_boolean
2634 mn10300_elf_relax_section (bfd *abfd,
2635 asection *sec,
2636 struct bfd_link_info *link_info,
2637 bfd_boolean *again)
2638 {
2639 Elf_Internal_Shdr *symtab_hdr;
2640 Elf_Internal_Rela *internal_relocs = NULL;
2641 Elf_Internal_Rela *irel, *irelend;
2642 bfd_byte *contents = NULL;
2643 Elf_Internal_Sym *isymbuf = NULL;
2644 struct elf32_mn10300_link_hash_table *hash_table;
2645 asection *section = sec;
2646 bfd_vma align_gap_adjustment;
2647
2648 if (bfd_link_relocatable (link_info))
2649 (*link_info->callbacks->einfo)
2650 (_("%P%F: --relax and -r may not be used together\n"));
2651
2652 /* Assume nothing changes. */
2653 *again = FALSE;
2654
2655 /* We need a pointer to the mn10300 specific hash table. */
2656 hash_table = elf32_mn10300_hash_table (link_info);
2657 if (hash_table == NULL)
2658 return FALSE;
2659
2660 /* Initialize fields in each hash table entry the first time through. */
2661 if ((hash_table->flags & MN10300_HASH_ENTRIES_INITIALIZED) == 0)
2662 {
2663 bfd *input_bfd;
2664
2665 /* Iterate over all the input bfds. */
2666 for (input_bfd = link_info->input_bfds;
2667 input_bfd != NULL;
2668 input_bfd = input_bfd->link.next)
2669 {
2670 /* We're going to need all the symbols for each bfd. */
2671 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2672 if (symtab_hdr->sh_info != 0)
2673 {
2674 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
2675 if (isymbuf == NULL)
2676 isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
2677 symtab_hdr->sh_info, 0,
2678 NULL, NULL, NULL);
2679 if (isymbuf == NULL)
2680 goto error_return;
2681 }
2682
2683 /* Iterate over each section in this bfd. */
2684 for (section = input_bfd->sections;
2685 section != NULL;
2686 section = section->next)
2687 {
2688 struct elf32_mn10300_link_hash_entry *hash;
2689 asection *sym_sec = NULL;
2690 const char *sym_name;
2691 char *new_name;
2692
2693 /* If there's nothing to do in this section, skip it. */
2694 if (! ((section->flags & SEC_RELOC) != 0
2695 && section->reloc_count != 0))
2696 continue;
2697 if ((section->flags & SEC_ALLOC) == 0)
2698 continue;
2699
2700 /* Get cached copy of section contents if it exists. */
2701 if (elf_section_data (section)->this_hdr.contents != NULL)
2702 contents = elf_section_data (section)->this_hdr.contents;
2703 else if (section->size != 0)
2704 {
2705 /* Go get them off disk. */
2706 if (!bfd_malloc_and_get_section (input_bfd, section,
2707 &contents))
2708 goto error_return;
2709 }
2710 else
2711 contents = NULL;
2712
2713 /* If there aren't any relocs, then there's nothing to do. */
2714 if ((section->flags & SEC_RELOC) != 0
2715 && section->reloc_count != 0)
2716 {
2717 /* Get a copy of the native relocations. */
2718 internal_relocs = _bfd_elf_link_read_relocs (input_bfd, section,
2719 NULL, NULL,
2720 link_info->keep_memory);
2721 if (internal_relocs == NULL)
2722 goto error_return;
2723
2724 /* Now examine each relocation. */
2725 irel = internal_relocs;
2726 irelend = irel + section->reloc_count;
2727 for (; irel < irelend; irel++)
2728 {
2729 long r_type;
2730 unsigned long r_index;
2731 unsigned char code;
2732
2733 r_type = ELF32_R_TYPE (irel->r_info);
2734 r_index = ELF32_R_SYM (irel->r_info);
2735
2736 if (r_type < 0 || r_type >= (int) R_MN10300_MAX)
2737 goto error_return;
2738
2739 /* We need the name and hash table entry of the target
2740 symbol! */
2741 hash = NULL;
2742 sym_sec = NULL;
2743
2744 if (r_index < symtab_hdr->sh_info)
2745 {
2746 /* A local symbol. */
2747 Elf_Internal_Sym *isym;
2748 struct elf_link_hash_table *elftab;
2749 size_t amt;
2750
2751 isym = isymbuf + r_index;
2752 if (isym->st_shndx == SHN_UNDEF)
2753 sym_sec = bfd_und_section_ptr;
2754 else if (isym->st_shndx == SHN_ABS)
2755 sym_sec = bfd_abs_section_ptr;
2756 else if (isym->st_shndx == SHN_COMMON)
2757 sym_sec = bfd_com_section_ptr;
2758 else
2759 sym_sec
2760 = bfd_section_from_elf_index (input_bfd,
2761 isym->st_shndx);
2762
2763 sym_name
2764 = bfd_elf_string_from_elf_section (input_bfd,
2765 (symtab_hdr
2766 ->sh_link),
2767 isym->st_name);
2768
2769 /* If it isn't a function, then we don't care
2770 about it. */
2771 if (ELF_ST_TYPE (isym->st_info) != STT_FUNC)
2772 continue;
2773
2774 /* Tack on an ID so we can uniquely identify this
2775 local symbol in the global hash table. */
2776 amt = strlen (sym_name) + 10;
2777 new_name = bfd_malloc (amt);
2778 if (new_name == NULL)
2779 goto error_return;
2780
2781 sprintf (new_name, "%s_%08x", sym_name, sym_sec->id);
2782 sym_name = new_name;
2783
2784 elftab = &hash_table->static_hash_table->root;
2785 hash = ((struct elf32_mn10300_link_hash_entry *)
2786 elf_link_hash_lookup (elftab, sym_name,
2787 TRUE, TRUE, FALSE));
2788 free (new_name);
2789 }
2790 else
2791 {
2792 r_index -= symtab_hdr->sh_info;
2793 hash = (struct elf32_mn10300_link_hash_entry *)
2794 elf_sym_hashes (input_bfd)[r_index];
2795 }
2796
2797 sym_name = hash->root.root.root.string;
2798 if ((section->flags & SEC_CODE) != 0)
2799 {
2800 /* If this is not a "call" instruction, then we
2801 should convert "call" instructions to "calls"
2802 instructions. */
2803 code = bfd_get_8 (input_bfd,
2804 contents + irel->r_offset - 1);
2805 if (code != 0xdd && code != 0xcd)
2806 hash->flags |= MN10300_CONVERT_CALL_TO_CALLS;
2807 }
2808
2809 /* If this is a jump/call, then bump the
2810 direct_calls counter. Else force "call" to
2811 "calls" conversions. */
2812 if (r_type == R_MN10300_PCREL32
2813 || r_type == R_MN10300_PLT32
2814 || r_type == R_MN10300_PLT16
2815 || r_type == R_MN10300_PCREL16)
2816 hash->direct_calls++;
2817 else
2818 hash->flags |= MN10300_CONVERT_CALL_TO_CALLS;
2819 }
2820 }
2821
2822 /* Now look at the actual contents to get the stack size,
2823 and a list of what registers were saved in the prologue
2824 (ie movm_args). */
2825 if ((section->flags & SEC_CODE) != 0)
2826 {
2827 Elf_Internal_Sym *isym, *isymend;
2828 unsigned int sec_shndx;
2829 struct elf_link_hash_entry **hashes;
2830 struct elf_link_hash_entry **end_hashes;
2831 unsigned int symcount;
2832
2833 sec_shndx = _bfd_elf_section_from_bfd_section (input_bfd,
2834 section);
2835
2836 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
2837 - symtab_hdr->sh_info);
2838 hashes = elf_sym_hashes (input_bfd);
2839 end_hashes = hashes + symcount;
2840
2841 /* Look at each function defined in this section and
2842 update info for that function. */
2843 isymend = isymbuf + symtab_hdr->sh_info;
2844 for (isym = isymbuf; isym < isymend; isym++)
2845 {
2846 if (isym->st_shndx == sec_shndx
2847 && ELF_ST_TYPE (isym->st_info) == STT_FUNC)
2848 {
2849 struct elf_link_hash_table *elftab;
2850 size_t amt;
2851 struct elf_link_hash_entry **lhashes = hashes;
2852
2853 /* Skip a local symbol if it aliases a
2854 global one. */
2855 for (; lhashes < end_hashes; lhashes++)
2856 {
2857 hash = (struct elf32_mn10300_link_hash_entry *) *lhashes;
2858 if ((hash->root.root.type == bfd_link_hash_defined
2859 || hash->root.root.type == bfd_link_hash_defweak)
2860 && hash->root.root.u.def.section == section
2861 && hash->root.type == STT_FUNC
2862 && hash->root.root.u.def.value == isym->st_value)
2863 break;
2864 }
2865 if (lhashes != end_hashes)
2866 continue;
2867
2868 if (isym->st_shndx == SHN_UNDEF)
2869 sym_sec = bfd_und_section_ptr;
2870 else if (isym->st_shndx == SHN_ABS)
2871 sym_sec = bfd_abs_section_ptr;
2872 else if (isym->st_shndx == SHN_COMMON)
2873 sym_sec = bfd_com_section_ptr;
2874 else
2875 sym_sec
2876 = bfd_section_from_elf_index (input_bfd,
2877 isym->st_shndx);
2878
2879 sym_name = (bfd_elf_string_from_elf_section
2880 (input_bfd, symtab_hdr->sh_link,
2881 isym->st_name));
2882
2883 /* Tack on an ID so we can uniquely identify this
2884 local symbol in the global hash table. */
2885 amt = strlen (sym_name) + 10;
2886 new_name = bfd_malloc (amt);
2887 if (new_name == NULL)
2888 goto error_return;
2889
2890 sprintf (new_name, "%s_%08x", sym_name, sym_sec->id);
2891 sym_name = new_name;
2892
2893 elftab = &hash_table->static_hash_table->root;
2894 hash = ((struct elf32_mn10300_link_hash_entry *)
2895 elf_link_hash_lookup (elftab, sym_name,
2896 TRUE, TRUE, FALSE));
2897 free (new_name);
2898 compute_function_info (input_bfd, hash,
2899 isym->st_value, contents);
2900 hash->value = isym->st_value;
2901 }
2902 }
2903
2904 for (; hashes < end_hashes; hashes++)
2905 {
2906 hash = (struct elf32_mn10300_link_hash_entry *) *hashes;
2907 if ((hash->root.root.type == bfd_link_hash_defined
2908 || hash->root.root.type == bfd_link_hash_defweak)
2909 && hash->root.root.u.def.section == section
2910 && hash->root.type == STT_FUNC)
2911 compute_function_info (input_bfd, hash,
2912 (hash)->root.root.u.def.value,
2913 contents);
2914 }
2915 }
2916
2917 /* Cache or free any memory we allocated for the relocs. */
2918 if (elf_section_data (section)->relocs != internal_relocs)
2919 free (internal_relocs);
2920 internal_relocs = NULL;
2921
2922 /* Cache or free any memory we allocated for the contents. */
2923 if (contents != NULL
2924 && elf_section_data (section)->this_hdr.contents != contents)
2925 {
2926 if (! link_info->keep_memory)
2927 free (contents);
2928 else
2929 {
2930 /* Cache the section contents for elf_link_input_bfd. */
2931 elf_section_data (section)->this_hdr.contents = contents;
2932 }
2933 }
2934 contents = NULL;
2935 }
2936
2937 /* Cache or free any memory we allocated for the symbols. */
2938 if (isymbuf != NULL
2939 && symtab_hdr->contents != (unsigned char *) isymbuf)
2940 {
2941 if (! link_info->keep_memory)
2942 free (isymbuf);
2943 else
2944 {
2945 /* Cache the symbols for elf_link_input_bfd. */
2946 symtab_hdr->contents = (unsigned char *) isymbuf;
2947 }
2948 }
2949 isymbuf = NULL;
2950 }
2951
2952 /* Now iterate on each symbol in the hash table and perform
2953 the final initialization steps on each. */
2954 elf32_mn10300_link_hash_traverse (hash_table,
2955 elf32_mn10300_finish_hash_table_entry,
2956 link_info);
2957 elf32_mn10300_link_hash_traverse (hash_table->static_hash_table,
2958 elf32_mn10300_finish_hash_table_entry,
2959 link_info);
2960
2961 {
2962 /* This section of code collects all our local symbols, sorts
2963 them by value, and looks for multiple symbols referring to
2964 the same address. For those symbols, the flags are merged.
2965 At this point, the only flag that can be set is
2966 MN10300_CONVERT_CALL_TO_CALLS, so we simply OR the flags
2967 together. */
2968 int static_count = 0, i;
2969 struct elf32_mn10300_link_hash_entry **entries;
2970 struct elf32_mn10300_link_hash_entry **ptr;
2971
2972 elf32_mn10300_link_hash_traverse (hash_table->static_hash_table,
2973 elf32_mn10300_count_hash_table_entries,
2974 &static_count);
2975
2976 entries = bfd_malloc (static_count * sizeof (* ptr));
2977
2978 ptr = entries;
2979 elf32_mn10300_link_hash_traverse (hash_table->static_hash_table,
2980 elf32_mn10300_list_hash_table_entries,
2981 & ptr);
2982
2983 qsort (entries, static_count, sizeof (entries[0]), sort_by_value);
2984
2985 for (i = 0; i < static_count - 1; i++)
2986 if (entries[i]->value && entries[i]->value == entries[i+1]->value)
2987 {
2988 int v = entries[i]->flags;
2989 int j;
2990
2991 for (j = i + 1; j < static_count && entries[j]->value == entries[i]->value; j++)
2992 v |= entries[j]->flags;
2993
2994 for (j = i; j < static_count && entries[j]->value == entries[i]->value; j++)
2995 entries[j]->flags = v;
2996
2997 i = j - 1;
2998 }
2999 }
3000
3001 /* All entries in the hash table are fully initialized. */
3002 hash_table->flags |= MN10300_HASH_ENTRIES_INITIALIZED;
3003
3004 /* Now that everything has been initialized, go through each
3005 code section and delete any prologue insns which will be
3006 redundant because their operations will be performed by
3007 a "call" instruction. */
3008 for (input_bfd = link_info->input_bfds;
3009 input_bfd != NULL;
3010 input_bfd = input_bfd->link.next)
3011 {
3012 /* We're going to need all the local symbols for each bfd. */
3013 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3014 if (symtab_hdr->sh_info != 0)
3015 {
3016 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
3017 if (isymbuf == NULL)
3018 isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
3019 symtab_hdr->sh_info, 0,
3020 NULL, NULL, NULL);
3021 if (isymbuf == NULL)
3022 goto error_return;
3023 }
3024
3025 /* Walk over each section in this bfd. */
3026 for (section = input_bfd->sections;
3027 section != NULL;
3028 section = section->next)
3029 {
3030 unsigned int sec_shndx;
3031 Elf_Internal_Sym *isym, *isymend;
3032 struct elf_link_hash_entry **hashes;
3033 struct elf_link_hash_entry **end_hashes;
3034 unsigned int symcount;
3035
3036 /* Skip non-code sections and empty sections. */
3037 if ((section->flags & SEC_CODE) == 0 || section->size == 0)
3038 continue;
3039
3040 if (section->reloc_count != 0)
3041 {
3042 /* Get a copy of the native relocations. */
3043 internal_relocs = _bfd_elf_link_read_relocs (input_bfd, section,
3044 NULL, NULL,
3045 link_info->keep_memory);
3046 if (internal_relocs == NULL)
3047 goto error_return;
3048 }
3049
3050 /* Get cached copy of section contents if it exists. */
3051 if (elf_section_data (section)->this_hdr.contents != NULL)
3052 contents = elf_section_data (section)->this_hdr.contents;
3053 else
3054 {
3055 /* Go get them off disk. */
3056 if (!bfd_malloc_and_get_section (input_bfd, section,
3057 &contents))
3058 goto error_return;
3059 }
3060
3061 sec_shndx = _bfd_elf_section_from_bfd_section (input_bfd,
3062 section);
3063
3064 /* Now look for any function in this section which needs
3065 insns deleted from its prologue. */
3066 isymend = isymbuf + symtab_hdr->sh_info;
3067 for (isym = isymbuf; isym < isymend; isym++)
3068 {
3069 struct elf32_mn10300_link_hash_entry *sym_hash;
3070 asection *sym_sec = NULL;
3071 const char *sym_name;
3072 char *new_name;
3073 struct elf_link_hash_table *elftab;
3074 size_t amt;
3075
3076 if (isym->st_shndx != sec_shndx)
3077 continue;
3078
3079 if (isym->st_shndx == SHN_UNDEF)
3080 sym_sec = bfd_und_section_ptr;
3081 else if (isym->st_shndx == SHN_ABS)
3082 sym_sec = bfd_abs_section_ptr;
3083 else if (isym->st_shndx == SHN_COMMON)
3084 sym_sec = bfd_com_section_ptr;
3085 else
3086 sym_sec
3087 = bfd_section_from_elf_index (input_bfd, isym->st_shndx);
3088
3089 sym_name
3090 = bfd_elf_string_from_elf_section (input_bfd,
3091 symtab_hdr->sh_link,
3092 isym->st_name);
3093
3094 /* Tack on an ID so we can uniquely identify this
3095 local symbol in the global hash table. */
3096 amt = strlen (sym_name) + 10;
3097 new_name = bfd_malloc (amt);
3098 if (new_name == NULL)
3099 goto error_return;
3100 sprintf (new_name, "%s_%08x", sym_name, sym_sec->id);
3101 sym_name = new_name;
3102
3103 elftab = & hash_table->static_hash_table->root;
3104 sym_hash = (struct elf32_mn10300_link_hash_entry *)
3105 elf_link_hash_lookup (elftab, sym_name,
3106 FALSE, FALSE, FALSE);
3107
3108 free (new_name);
3109 if (sym_hash == NULL)
3110 continue;
3111
3112 if (! (sym_hash->flags & MN10300_CONVERT_CALL_TO_CALLS)
3113 && ! (sym_hash->flags & MN10300_DELETED_PROLOGUE_BYTES))
3114 {
3115 int bytes = 0;
3116
3117 /* Note that we've changed things. */
3118 elf_section_data (section)->relocs = internal_relocs;
3119 elf_section_data (section)->this_hdr.contents = contents;
3120 symtab_hdr->contents = (unsigned char *) isymbuf;
3121
3122 /* Count how many bytes we're going to delete. */
3123 if (sym_hash->movm_args)
3124 bytes += 2;
3125
3126 if (sym_hash->stack_size > 0)
3127 {
3128 if (sym_hash->stack_size <= 128)
3129 bytes += 3;
3130 else
3131 bytes += 4;
3132 }
3133
3134 /* Note that we've deleted prologue bytes for this
3135 function. */
3136 sym_hash->flags |= MN10300_DELETED_PROLOGUE_BYTES;
3137
3138 /* Actually delete the bytes. */
3139 if (!mn10300_elf_relax_delete_bytes (input_bfd,
3140 section,
3141 isym->st_value,
3142 bytes))
3143 goto error_return;
3144
3145 /* Something changed. Not strictly necessary, but
3146 may lead to more relaxing opportunities. */
3147 *again = TRUE;
3148 }
3149 }
3150
3151 /* Look for any global functions in this section which
3152 need insns deleted from their prologues. */
3153 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
3154 - symtab_hdr->sh_info);
3155 hashes = elf_sym_hashes (input_bfd);
3156 end_hashes = hashes + symcount;
3157 for (; hashes < end_hashes; hashes++)
3158 {
3159 struct elf32_mn10300_link_hash_entry *sym_hash;
3160
3161 sym_hash = (struct elf32_mn10300_link_hash_entry *) *hashes;
3162 if ((sym_hash->root.root.type == bfd_link_hash_defined
3163 || sym_hash->root.root.type == bfd_link_hash_defweak)
3164 && sym_hash->root.root.u.def.section == section
3165 && ! (sym_hash->flags & MN10300_CONVERT_CALL_TO_CALLS)
3166 && ! (sym_hash->flags & MN10300_DELETED_PROLOGUE_BYTES))
3167 {
3168 int bytes = 0;
3169 bfd_vma symval;
3170 struct elf_link_hash_entry **hh;
3171
3172 /* Note that we've changed things. */
3173 elf_section_data (section)->relocs = internal_relocs;
3174 elf_section_data (section)->this_hdr.contents = contents;
3175 symtab_hdr->contents = (unsigned char *) isymbuf;
3176
3177 /* Count how many bytes we're going to delete. */
3178 if (sym_hash->movm_args)
3179 bytes += 2;
3180
3181 if (sym_hash->stack_size > 0)
3182 {
3183 if (sym_hash->stack_size <= 128)
3184 bytes += 3;
3185 else
3186 bytes += 4;
3187 }
3188
3189 /* Note that we've deleted prologue bytes for this
3190 function. */
3191 sym_hash->flags |= MN10300_DELETED_PROLOGUE_BYTES;
3192
3193 /* Actually delete the bytes. */
3194 symval = sym_hash->root.root.u.def.value;
3195 if (!mn10300_elf_relax_delete_bytes (input_bfd,
3196 section,
3197 symval,
3198 bytes))
3199 goto error_return;
3200
3201 /* There may be other C++ functions symbols with the same
3202 address. If so then mark these as having had their
3203 prologue bytes deleted as well. */
3204 for (hh = elf_sym_hashes (input_bfd); hh < end_hashes; hh++)
3205 {
3206 struct elf32_mn10300_link_hash_entry *h;
3207
3208 h = (struct elf32_mn10300_link_hash_entry *) * hh;
3209
3210 if (h != sym_hash
3211 && (h->root.root.type == bfd_link_hash_defined
3212 || h->root.root.type == bfd_link_hash_defweak)
3213 && h->root.root.u.def.section == section
3214 && ! (h->flags & MN10300_CONVERT_CALL_TO_CALLS)
3215 && h->root.root.u.def.value == symval
3216 && h->root.type == STT_FUNC)
3217 h->flags |= MN10300_DELETED_PROLOGUE_BYTES;
3218 }
3219
3220 /* Something changed. Not strictly necessary, but
3221 may lead to more relaxing opportunities. */
3222 *again = TRUE;
3223 }
3224 }
3225
3226 /* Cache or free any memory we allocated for the relocs. */
3227 if (elf_section_data (section)->relocs != internal_relocs)
3228 free (internal_relocs);
3229 internal_relocs = NULL;
3230
3231 /* Cache or free any memory we allocated for the contents. */
3232 if (contents != NULL
3233 && elf_section_data (section)->this_hdr.contents != contents)
3234 {
3235 if (! link_info->keep_memory)
3236 free (contents);
3237 else
3238 /* Cache the section contents for elf_link_input_bfd. */
3239 elf_section_data (section)->this_hdr.contents = contents;
3240 }
3241 contents = NULL;
3242 }
3243
3244 /* Cache or free any memory we allocated for the symbols. */
3245 if (isymbuf != NULL
3246 && symtab_hdr->contents != (unsigned char *) isymbuf)
3247 {
3248 if (! link_info->keep_memory)
3249 free (isymbuf);
3250 else
3251 /* Cache the symbols for elf_link_input_bfd. */
3252 symtab_hdr->contents = (unsigned char *) isymbuf;
3253 }
3254 isymbuf = NULL;
3255 }
3256 }
3257
3258 /* (Re)initialize for the basic instruction shortening/relaxing pass. */
3259 contents = NULL;
3260 internal_relocs = NULL;
3261 isymbuf = NULL;
3262 /* For error_return. */
3263 section = sec;
3264
3265 /* We don't have to do anything for a relocatable link, if
3266 this section does not have relocs, or if this is not a
3267 code section. */
3268 if (bfd_link_relocatable (link_info)
3269 || (sec->flags & SEC_RELOC) == 0
3270 || sec->reloc_count == 0
3271 || (sec->flags & SEC_CODE) == 0)
3272 return TRUE;
3273
3274 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3275
3276 /* Get a copy of the native relocations. */
3277 internal_relocs = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL,
3278 link_info->keep_memory);
3279 if (internal_relocs == NULL)
3280 goto error_return;
3281
3282 /* Scan for worst case alignment gap changes. Note that this logic
3283 is not ideal; what we should do is run this scan for every
3284 opcode/address range and adjust accordingly, but that's
3285 expensive. Worst case is that for an alignment of N bytes, we
3286 move by 2*N-N-1 bytes, assuming we have aligns of 1, 2, 4, 8, etc
3287 all before it. Plus, this still doesn't cover cross-section
3288 jumps with section alignment. */
3289 irelend = internal_relocs + sec->reloc_count;
3290 align_gap_adjustment = 0;
3291 for (irel = internal_relocs; irel < irelend; irel++)
3292 {
3293 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_ALIGN)
3294 {
3295 bfd_vma adj = 1 << irel->r_addend;
3296 bfd_vma aend = irel->r_offset;
3297
3298 aend = BFD_ALIGN (aend, 1 << irel->r_addend);
3299 adj = 2 * adj - adj - 1;
3300
3301 /* Record the biggest adjustmnet. Skip any alignment at the
3302 end of our section. */
3303 if (align_gap_adjustment < adj
3304 && aend < sec->output_section->vma + sec->output_offset + sec->size)
3305 align_gap_adjustment = adj;
3306 }
3307 }
3308
3309 /* Walk through them looking for relaxing opportunities. */
3310 irelend = internal_relocs + sec->reloc_count;
3311 for (irel = internal_relocs; irel < irelend; irel++)
3312 {
3313 bfd_vma symval;
3314 bfd_signed_vma jump_offset;
3315 asection *sym_sec = NULL;
3316 struct elf32_mn10300_link_hash_entry *h = NULL;
3317
3318 /* If this isn't something that can be relaxed, then ignore
3319 this reloc. */
3320 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_NONE
3321 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_8
3322 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_MAX)
3323 continue;
3324
3325 /* Get the section contents if we haven't done so already. */
3326 if (contents == NULL)
3327 {
3328 /* Get cached copy if it exists. */
3329 if (elf_section_data (sec)->this_hdr.contents != NULL)
3330 contents = elf_section_data (sec)->this_hdr.contents;
3331 else
3332 {
3333 /* Go get them off disk. */
3334 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
3335 goto error_return;
3336 }
3337 }
3338
3339 /* Read this BFD's symbols if we haven't done so already. */
3340 if (isymbuf == NULL && symtab_hdr->sh_info != 0)
3341 {
3342 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
3343 if (isymbuf == NULL)
3344 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
3345 symtab_hdr->sh_info, 0,
3346 NULL, NULL, NULL);
3347 if (isymbuf == NULL)
3348 goto error_return;
3349 }
3350
3351 /* Get the value of the symbol referred to by the reloc. */
3352 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
3353 {
3354 Elf_Internal_Sym *isym;
3355 const char *sym_name;
3356 char *new_name;
3357
3358 /* A local symbol. */
3359 isym = isymbuf + ELF32_R_SYM (irel->r_info);
3360 if (isym->st_shndx == SHN_UNDEF)
3361 sym_sec = bfd_und_section_ptr;
3362 else if (isym->st_shndx == SHN_ABS)
3363 sym_sec = bfd_abs_section_ptr;
3364 else if (isym->st_shndx == SHN_COMMON)
3365 sym_sec = bfd_com_section_ptr;
3366 else
3367 sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
3368
3369 sym_name = bfd_elf_string_from_elf_section (abfd,
3370 symtab_hdr->sh_link,
3371 isym->st_name);
3372
3373 if ((sym_sec->flags & SEC_MERGE)
3374 && sym_sec->sec_info_type == SEC_INFO_TYPE_MERGE)
3375 {
3376 symval = isym->st_value;
3377
3378 /* GAS may reduce relocations against symbols in SEC_MERGE
3379 sections to a relocation against the section symbol when
3380 the original addend was zero. When the reloc is against
3381 a section symbol we should include the addend in the
3382 offset passed to _bfd_merged_section_offset, since the
3383 location of interest is the original symbol. On the
3384 other hand, an access to "sym+addend" where "sym" is not
3385 a section symbol should not include the addend; Such an
3386 access is presumed to be an offset from "sym"; The
3387 location of interest is just "sym". */
3388 if (ELF_ST_TYPE (isym->st_info) == STT_SECTION)
3389 symval += irel->r_addend;
3390
3391 symval = _bfd_merged_section_offset (abfd, & sym_sec,
3392 elf_section_data (sym_sec)->sec_info,
3393 symval);
3394
3395 if (ELF_ST_TYPE (isym->st_info) != STT_SECTION)
3396 symval += irel->r_addend;
3397
3398 symval += sym_sec->output_section->vma
3399 + sym_sec->output_offset - irel->r_addend;
3400 }
3401 else
3402 symval = (isym->st_value
3403 + sym_sec->output_section->vma
3404 + sym_sec->output_offset);
3405
3406 /* Tack on an ID so we can uniquely identify this
3407 local symbol in the global hash table. */
3408 new_name = bfd_malloc ((bfd_size_type) strlen (sym_name) + 10);
3409 if (new_name == NULL)
3410 goto error_return;
3411 sprintf (new_name, "%s_%08x", sym_name, sym_sec->id);
3412 sym_name = new_name;
3413
3414 h = (struct elf32_mn10300_link_hash_entry *)
3415 elf_link_hash_lookup (&hash_table->static_hash_table->root,
3416 sym_name, FALSE, FALSE, FALSE);
3417 free (new_name);
3418 }
3419 else
3420 {
3421 unsigned long indx;
3422
3423 /* An external symbol. */
3424 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
3425 h = (struct elf32_mn10300_link_hash_entry *)
3426 (elf_sym_hashes (abfd)[indx]);
3427 BFD_ASSERT (h != NULL);
3428 if (h->root.root.type != bfd_link_hash_defined
3429 && h->root.root.type != bfd_link_hash_defweak)
3430 /* This appears to be a reference to an undefined
3431 symbol. Just ignore it--it will be caught by the
3432 regular reloc processing. */
3433 continue;
3434
3435 /* Check for a reference to a discarded symbol and ignore it. */
3436 if (h->root.root.u.def.section->output_section == NULL)
3437 continue;
3438
3439 sym_sec = h->root.root.u.def.section->output_section;
3440
3441 symval = (h->root.root.u.def.value
3442 + h->root.root.u.def.section->output_section->vma
3443 + h->root.root.u.def.section->output_offset);
3444 }
3445
3446 /* For simplicity of coding, we are going to modify the section
3447 contents, the section relocs, and the BFD symbol table. We
3448 must tell the rest of the code not to free up this
3449 information. It would be possible to instead create a table
3450 of changes which have to be made, as is done in coff-mips.c;
3451 that would be more work, but would require less memory when
3452 the linker is run. */
3453
3454 /* Try to turn a 32bit pc-relative branch/call into a 16bit pc-relative
3455 branch/call, also deal with "call" -> "calls" conversions and
3456 insertion of prologue data into "call" instructions. */
3457 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL32
3458 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PLT32)
3459 {
3460 bfd_vma value = symval;
3461
3462 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PLT32
3463 && h != NULL
3464 && ELF_ST_VISIBILITY (h->root.other) != STV_INTERNAL
3465 && ELF_ST_VISIBILITY (h->root.other) != STV_HIDDEN
3466 && h->root.plt.offset != (bfd_vma) -1)
3467 {
3468 asection * splt;
3469
3470 splt = hash_table->root.splt;
3471 value = ((splt->output_section->vma
3472 + splt->output_offset
3473 + h->root.plt.offset)
3474 - (sec->output_section->vma
3475 + sec->output_offset
3476 + irel->r_offset));
3477 }
3478
3479 /* If we've got a "call" instruction that needs to be turned
3480 into a "calls" instruction, do so now. It saves a byte. */
3481 if (h && (h->flags & MN10300_CONVERT_CALL_TO_CALLS))
3482 {
3483 unsigned char code;
3484
3485 /* Get the opcode. */
3486 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
3487
3488 /* Make sure we're working with a "call" instruction! */
3489 if (code == 0xdd)
3490 {
3491 /* Note that we've changed the relocs, section contents,
3492 etc. */
3493 elf_section_data (sec)->relocs = internal_relocs;
3494 elf_section_data (sec)->this_hdr.contents = contents;
3495 symtab_hdr->contents = (unsigned char *) isymbuf;
3496
3497 /* Fix the opcode. */
3498 bfd_put_8 (abfd, 0xfc, contents + irel->r_offset - 1);
3499 bfd_put_8 (abfd, 0xff, contents + irel->r_offset);
3500
3501 /* Fix irel->r_offset and irel->r_addend. */
3502 irel->r_offset += 1;
3503 irel->r_addend += 1;
3504
3505 /* Delete one byte of data. */
3506 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3507 irel->r_offset + 3, 1))
3508 goto error_return;
3509
3510 /* That will change things, so, we should relax again.
3511 Note that this is not required, and it may be slow. */
3512 *again = TRUE;
3513 }
3514 }
3515 else if (h)
3516 {
3517 /* We've got a "call" instruction which needs some data
3518 from target function filled in. */
3519 unsigned char code;
3520
3521 /* Get the opcode. */
3522 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
3523
3524 /* Insert data from the target function into the "call"
3525 instruction if needed. */
3526 if (code == 0xdd)
3527 {
3528 bfd_put_8 (abfd, h->movm_args, contents + irel->r_offset + 4);
3529 bfd_put_8 (abfd, h->stack_size + h->movm_stack_size,
3530 contents + irel->r_offset + 5);
3531 }
3532 }
3533
3534 /* Deal with pc-relative gunk. */
3535 value -= (sec->output_section->vma + sec->output_offset);
3536 value -= irel->r_offset;
3537 value += irel->r_addend;
3538
3539 /* See if the value will fit in 16 bits, note the high value is
3540 0x7fff + 2 as the target will be two bytes closer if we are
3541 able to relax, if it's in the same section. */
3542 if (sec->output_section == sym_sec->output_section)
3543 jump_offset = 0x8001;
3544 else
3545 jump_offset = 0x7fff;
3546
3547 /* Account for jumps across alignment boundaries using
3548 align_gap_adjustment. */
3549 if ((bfd_signed_vma) value < jump_offset - (bfd_signed_vma) align_gap_adjustment
3550 && ((bfd_signed_vma) value > -0x8000 + (bfd_signed_vma) align_gap_adjustment))
3551 {
3552 unsigned char code;
3553
3554 /* Get the opcode. */
3555 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
3556
3557 if (code != 0xdc && code != 0xdd && code != 0xff)
3558 continue;
3559
3560 /* Note that we've changed the relocs, section contents, etc. */
3561 elf_section_data (sec)->relocs = internal_relocs;
3562 elf_section_data (sec)->this_hdr.contents = contents;
3563 symtab_hdr->contents = (unsigned char *) isymbuf;
3564
3565 /* Fix the opcode. */
3566 if (code == 0xdc)
3567 bfd_put_8 (abfd, 0xcc, contents + irel->r_offset - 1);
3568 else if (code == 0xdd)
3569 bfd_put_8 (abfd, 0xcd, contents + irel->r_offset - 1);
3570 else if (code == 0xff)
3571 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
3572
3573 /* Fix the relocation's type. */
3574 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3575 (ELF32_R_TYPE (irel->r_info)
3576 == (int) R_MN10300_PLT32)
3577 ? R_MN10300_PLT16 :
3578 R_MN10300_PCREL16);
3579
3580 /* Delete two bytes of data. */
3581 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3582 irel->r_offset + 1, 2))
3583 goto error_return;
3584
3585 /* That will change things, so, we should relax again.
3586 Note that this is not required, and it may be slow. */
3587 *again = TRUE;
3588 }
3589 }
3590
3591 /* Try to turn a 16bit pc-relative branch into a 8bit pc-relative
3592 branch. */
3593 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL16)
3594 {
3595 bfd_vma value = symval;
3596
3597 /* If we've got a "call" instruction that needs to be turned
3598 into a "calls" instruction, do so now. It saves a byte. */
3599 if (h && (h->flags & MN10300_CONVERT_CALL_TO_CALLS))
3600 {
3601 unsigned char code;
3602
3603 /* Get the opcode. */
3604 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
3605
3606 /* Make sure we're working with a "call" instruction! */
3607 if (code == 0xcd)
3608 {
3609 /* Note that we've changed the relocs, section contents,
3610 etc. */
3611 elf_section_data (sec)->relocs = internal_relocs;
3612 elf_section_data (sec)->this_hdr.contents = contents;
3613 symtab_hdr->contents = (unsigned char *) isymbuf;
3614
3615 /* Fix the opcode. */
3616 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 1);
3617 bfd_put_8 (abfd, 0xff, contents + irel->r_offset);
3618
3619 /* Fix irel->r_offset and irel->r_addend. */
3620 irel->r_offset += 1;
3621 irel->r_addend += 1;
3622
3623 /* Delete one byte of data. */
3624 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3625 irel->r_offset + 1, 1))
3626 goto error_return;
3627
3628 /* That will change things, so, we should relax again.
3629 Note that this is not required, and it may be slow. */
3630 *again = TRUE;
3631 }
3632 }
3633 else if (h)
3634 {
3635 unsigned char code;
3636
3637 /* Get the opcode. */
3638 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
3639
3640 /* Insert data from the target function into the "call"
3641 instruction if needed. */
3642 if (code == 0xcd)
3643 {
3644 bfd_put_8 (abfd, h->movm_args, contents + irel->r_offset + 2);
3645 bfd_put_8 (abfd, h->stack_size + h->movm_stack_size,
3646 contents + irel->r_offset + 3);
3647 }
3648 }
3649
3650 /* Deal with pc-relative gunk. */
3651 value -= (sec->output_section->vma + sec->output_offset);
3652 value -= irel->r_offset;
3653 value += irel->r_addend;
3654
3655 /* See if the value will fit in 8 bits, note the high value is
3656 0x7f + 1 as the target will be one bytes closer if we are
3657 able to relax. */
3658 if ((long) value < 0x80 && (long) value > -0x80)
3659 {
3660 unsigned char code;
3661
3662 /* Get the opcode. */
3663 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
3664
3665 if (code != 0xcc)
3666 continue;
3667
3668 /* Note that we've changed the relocs, section contents, etc. */
3669 elf_section_data (sec)->relocs = internal_relocs;
3670 elf_section_data (sec)->this_hdr.contents = contents;
3671 symtab_hdr->contents = (unsigned char *) isymbuf;
3672
3673 /* Fix the opcode. */
3674 bfd_put_8 (abfd, 0xca, contents + irel->r_offset - 1);
3675
3676 /* Fix the relocation's type. */
3677 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3678 R_MN10300_PCREL8);
3679
3680 /* Delete one byte of data. */
3681 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3682 irel->r_offset + 1, 1))
3683 goto error_return;
3684
3685 /* That will change things, so, we should relax again.
3686 Note that this is not required, and it may be slow. */
3687 *again = TRUE;
3688 }
3689 }
3690
3691 /* Try to eliminate an unconditional 8 bit pc-relative branch
3692 which immediately follows a conditional 8 bit pc-relative
3693 branch around the unconditional branch.
3694
3695 original: new:
3696 bCC lab1 bCC' lab2
3697 bra lab2
3698 lab1: lab1:
3699
3700 This happens when the bCC can't reach lab2 at assembly time,
3701 but due to other relaxations it can reach at link time. */
3702 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL8)
3703 {
3704 Elf_Internal_Rela *nrel;
3705 bfd_vma value = symval;
3706 unsigned char code;
3707
3708 /* Deal with pc-relative gunk. */
3709 value -= (sec->output_section->vma + sec->output_offset);
3710 value -= irel->r_offset;
3711 value += irel->r_addend;
3712
3713 /* Do nothing if this reloc is the last byte in the section. */
3714 if (irel->r_offset == sec->size)
3715 continue;
3716
3717 /* See if the next instruction is an unconditional pc-relative
3718 branch, more often than not this test will fail, so we
3719 test it first to speed things up. */
3720 code = bfd_get_8 (abfd, contents + irel->r_offset + 1);
3721 if (code != 0xca)
3722 continue;
3723
3724 /* Also make sure the next relocation applies to the next
3725 instruction and that it's a pc-relative 8 bit branch. */
3726 nrel = irel + 1;
3727 if (nrel == irelend
3728 || irel->r_offset + 2 != nrel->r_offset
3729 || ELF32_R_TYPE (nrel->r_info) != (int) R_MN10300_PCREL8)
3730 continue;
3731
3732 /* Make sure our destination immediately follows the
3733 unconditional branch. */
3734 if (symval != (sec->output_section->vma + sec->output_offset
3735 + irel->r_offset + 3))
3736 continue;
3737
3738 /* Now make sure we are a conditional branch. This may not
3739 be necessary, but why take the chance.
3740
3741 Note these checks assume that R_MN10300_PCREL8 relocs
3742 only occur on bCC and bCCx insns. If they occured
3743 elsewhere, we'd need to know the start of this insn
3744 for this check to be accurate. */
3745 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
3746 if (code != 0xc0 && code != 0xc1 && code != 0xc2
3747 && code != 0xc3 && code != 0xc4 && code != 0xc5
3748 && code != 0xc6 && code != 0xc7 && code != 0xc8
3749 && code != 0xc9 && code != 0xe8 && code != 0xe9
3750 && code != 0xea && code != 0xeb)
3751 continue;
3752
3753 /* We also have to be sure there is no symbol/label
3754 at the unconditional branch. */
3755 if (mn10300_elf_symbol_address_p (abfd, sec, isymbuf,
3756 irel->r_offset + 1))
3757 continue;
3758
3759 /* Note that we've changed the relocs, section contents, etc. */
3760 elf_section_data (sec)->relocs = internal_relocs;
3761 elf_section_data (sec)->this_hdr.contents = contents;
3762 symtab_hdr->contents = (unsigned char *) isymbuf;
3763
3764 /* Reverse the condition of the first branch. */
3765 switch (code)
3766 {
3767 case 0xc8:
3768 code = 0xc9;
3769 break;
3770 case 0xc9:
3771 code = 0xc8;
3772 break;
3773 case 0xc0:
3774 code = 0xc2;
3775 break;
3776 case 0xc2:
3777 code = 0xc0;
3778 break;
3779 case 0xc3:
3780 code = 0xc1;
3781 break;
3782 case 0xc1:
3783 code = 0xc3;
3784 break;
3785 case 0xc4:
3786 code = 0xc6;
3787 break;
3788 case 0xc6:
3789 code = 0xc4;
3790 break;
3791 case 0xc7:
3792 code = 0xc5;
3793 break;
3794 case 0xc5:
3795 code = 0xc7;
3796 break;
3797 case 0xe8:
3798 code = 0xe9;
3799 break;
3800 case 0x9d:
3801 code = 0xe8;
3802 break;
3803 case 0xea:
3804 code = 0xeb;
3805 break;
3806 case 0xeb:
3807 code = 0xea;
3808 break;
3809 }
3810 bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
3811
3812 /* Set the reloc type and symbol for the first branch
3813 from the second branch. */
3814 irel->r_info = nrel->r_info;
3815
3816 /* Make the reloc for the second branch a null reloc. */
3817 nrel->r_info = ELF32_R_INFO (ELF32_R_SYM (nrel->r_info),
3818 R_MN10300_NONE);
3819
3820 /* Delete two bytes of data. */
3821 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3822 irel->r_offset + 1, 2))
3823 goto error_return;
3824
3825 /* That will change things, so, we should relax again.
3826 Note that this is not required, and it may be slow. */
3827 *again = TRUE;
3828 }
3829
3830 /* Try to turn a 24 immediate, displacement or absolute address
3831 into a 8 immediate, displacement or absolute address. */
3832 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_24)
3833 {
3834 bfd_vma value = symval;
3835 value += irel->r_addend;
3836
3837 /* See if the value will fit in 8 bits. */
3838 if ((long) value < 0x7f && (long) value > -0x80)
3839 {
3840 unsigned char code;
3841
3842 /* AM33 insns which have 24 operands are 6 bytes long and
3843 will have 0xfd as the first byte. */
3844
3845 /* Get the first opcode. */
3846 code = bfd_get_8 (abfd, contents + irel->r_offset - 3);
3847
3848 if (code == 0xfd)
3849 {
3850 /* Get the second opcode. */
3851 code = bfd_get_8 (abfd, contents + irel->r_offset - 2);
3852
3853 /* We can not relax 0x6b, 0x7b, 0x8b, 0x9b as no 24bit
3854 equivalent instructions exists. */
3855 if (code != 0x6b && code != 0x7b
3856 && code != 0x8b && code != 0x9b
3857 && ((code & 0x0f) == 0x09 || (code & 0x0f) == 0x08
3858 || (code & 0x0f) == 0x0a || (code & 0x0f) == 0x0b
3859 || (code & 0x0f) == 0x0e))
3860 {
3861 /* Not safe if the high bit is on as relaxing may
3862 move the value out of high mem and thus not fit
3863 in a signed 8bit value. This is currently over
3864 conservative. */
3865 if ((value & 0x80) == 0)
3866 {
3867 /* Note that we've changed the relocation contents,
3868 etc. */
3869 elf_section_data (sec)->relocs = internal_relocs;
3870 elf_section_data (sec)->this_hdr.contents = contents;
3871 symtab_hdr->contents = (unsigned char *) isymbuf;
3872
3873 /* Fix the opcode. */
3874 bfd_put_8 (abfd, 0xfb, contents + irel->r_offset - 3);
3875 bfd_put_8 (abfd, code, contents + irel->r_offset - 2);
3876
3877 /* Fix the relocation's type. */
3878 irel->r_info =
3879 ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3880 R_MN10300_8);
3881
3882 /* Delete two bytes of data. */
3883 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3884 irel->r_offset + 1, 2))
3885 goto error_return;
3886
3887 /* That will change things, so, we should relax
3888 again. Note that this is not required, and it
3889 may be slow. */
3890 *again = TRUE;
3891 break;
3892 }
3893 }
3894 }
3895 }
3896 }
3897
3898 /* Try to turn a 32bit immediate, displacement or absolute address
3899 into a 16bit immediate, displacement or absolute address. */
3900 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_32
3901 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOT32
3902 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOTOFF32)
3903 {
3904 bfd_vma value = symval;
3905
3906 if (ELF32_R_TYPE (irel->r_info) != (int) R_MN10300_32)
3907 {
3908 asection * sgot;
3909
3910 sgot = hash_table->root.sgot;
3911 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOT32)
3912 {
3913 value = sgot->output_offset;
3914
3915 if (h)
3916 value += h->root.got.offset;
3917 else
3918 value += (elf_local_got_offsets
3919 (abfd)[ELF32_R_SYM (irel->r_info)]);
3920 }
3921 else if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOTOFF32)
3922 value -= sgot->output_section->vma;
3923 else if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOTPC32)
3924 value = (sgot->output_section->vma
3925 - (sec->output_section->vma
3926 + sec->output_offset
3927 + irel->r_offset));
3928 else
3929 abort ();
3930 }
3931
3932 value += irel->r_addend;
3933
3934 /* See if the value will fit in 24 bits.
3935 We allow any 16bit match here. We prune those we can't
3936 handle below. */
3937 if (value + 0x800000 < 0x1000000 && irel->r_offset >= 3)
3938 {
3939 unsigned char code;
3940
3941 /* AM33 insns which have 32bit operands are 7 bytes long and
3942 will have 0xfe as the first byte. */
3943
3944 /* Get the first opcode. */
3945 code = bfd_get_8 (abfd, contents + irel->r_offset - 3);
3946
3947 if (code == 0xfe)
3948 {
3949 /* Get the second opcode. */
3950 code = bfd_get_8 (abfd, contents + irel->r_offset - 2);
3951
3952 /* All the am33 32 -> 24 relaxing possibilities. */
3953 /* We can not relax 0x6b, 0x7b, 0x8b, 0x9b as no 24bit
3954 equivalent instructions exists. */
3955 if (code != 0x6b && code != 0x7b
3956 && code != 0x8b && code != 0x9b
3957 && (ELF32_R_TYPE (irel->r_info)
3958 != (int) R_MN10300_GOTPC32)
3959 && ((code & 0x0f) == 0x09 || (code & 0x0f) == 0x08
3960 || (code & 0x0f) == 0x0a || (code & 0x0f) == 0x0b
3961 || (code & 0x0f) == 0x0e))
3962 {
3963 /* Not safe if the high bit is on as relaxing may
3964 move the value out of high mem and thus not fit
3965 in a signed 16bit value. This is currently over
3966 conservative. */
3967 if ((value & 0x8000) == 0)
3968 {
3969 /* Note that we've changed the relocation contents,
3970 etc. */
3971 elf_section_data (sec)->relocs = internal_relocs;
3972 elf_section_data (sec)->this_hdr.contents = contents;
3973 symtab_hdr->contents = (unsigned char *) isymbuf;
3974
3975 /* Fix the opcode. */
3976 bfd_put_8 (abfd, 0xfd, contents + irel->r_offset - 3);
3977 bfd_put_8 (abfd, code, contents + irel->r_offset - 2);
3978
3979 /* Fix the relocation's type. */
3980 irel->r_info =
3981 ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3982 (ELF32_R_TYPE (irel->r_info)
3983 == (int) R_MN10300_GOTOFF32)
3984 ? R_MN10300_GOTOFF24
3985 : (ELF32_R_TYPE (irel->r_info)
3986 == (int) R_MN10300_GOT32)
3987 ? R_MN10300_GOT24 :
3988 R_MN10300_24);
3989
3990 /* Delete one byte of data. */
3991 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3992 irel->r_offset + 3, 1))
3993 goto error_return;
3994
3995 /* That will change things, so, we should relax
3996 again. Note that this is not required, and it
3997 may be slow. */
3998 *again = TRUE;
3999 break;
4000 }
4001 }
4002 }
4003 }
4004
4005 /* See if the value will fit in 16 bits.
4006 We allow any 16bit match here. We prune those we can't
4007 handle below. */
4008 if (value + 0x8000 < 0x10000 && irel->r_offset >= 2)
4009 {
4010 unsigned char code;
4011
4012 /* Most insns which have 32bit operands are 6 bytes long;
4013 exceptions are pcrel insns and bit insns.
4014
4015 We handle pcrel insns above. We don't bother trying
4016 to handle the bit insns here.
4017
4018 The first byte of the remaining insns will be 0xfc. */
4019
4020 /* Get the first opcode. */
4021 code = bfd_get_8 (abfd, contents + irel->r_offset - 2);
4022
4023 if (code != 0xfc)
4024 continue;
4025
4026 /* Get the second opcode. */
4027 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
4028
4029 if ((code & 0xf0) < 0x80)
4030 switch (code & 0xf0)
4031 {
4032 /* mov (d32,am),dn -> mov (d32,am),dn
4033 mov dm,(d32,am) -> mov dn,(d32,am)
4034 mov (d32,am),an -> mov (d32,am),an
4035 mov dm,(d32,am) -> mov dn,(d32,am)
4036 movbu (d32,am),dn -> movbu (d32,am),dn
4037 movbu dm,(d32,am) -> movbu dn,(d32,am)
4038 movhu (d32,am),dn -> movhu (d32,am),dn
4039 movhu dm,(d32,am) -> movhu dn,(d32,am) */
4040 case 0x00:
4041 case 0x10:
4042 case 0x20:
4043 case 0x30:
4044 case 0x40:
4045 case 0x50:
4046 case 0x60:
4047 case 0x70:
4048 /* Not safe if the high bit is on as relaxing may
4049 move the value out of high mem and thus not fit
4050 in a signed 16bit value. */
4051 if (code == 0xcc
4052 && (value & 0x8000))
4053 continue;
4054
4055 /* Note that we've changed the relocation contents, etc. */
4056 elf_section_data (sec)->relocs = internal_relocs;
4057 elf_section_data (sec)->this_hdr.contents = contents;
4058 symtab_hdr->contents = (unsigned char *) isymbuf;
4059
4060 /* Fix the opcode. */
4061 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
4062 bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
4063
4064 /* Fix the relocation's type. */
4065 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
4066 (ELF32_R_TYPE (irel->r_info)
4067 == (int) R_MN10300_GOTOFF32)
4068 ? R_MN10300_GOTOFF16
4069 : (ELF32_R_TYPE (irel->r_info)
4070 == (int) R_MN10300_GOT32)
4071 ? R_MN10300_GOT16
4072 : (ELF32_R_TYPE (irel->r_info)
4073 == (int) R_MN10300_GOTPC32)
4074 ? R_MN10300_GOTPC16 :
4075 R_MN10300_16);
4076
4077 /* Delete two bytes of data. */
4078 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
4079 irel->r_offset + 2, 2))
4080 goto error_return;
4081
4082 /* That will change things, so, we should relax again.
4083 Note that this is not required, and it may be slow. */
4084 *again = TRUE;
4085 break;
4086 }
4087 else if ((code & 0xf0) == 0x80
4088 || (code & 0xf0) == 0x90)
4089 switch (code & 0xf3)
4090 {
4091 /* mov dn,(abs32) -> mov dn,(abs16)
4092 movbu dn,(abs32) -> movbu dn,(abs16)
4093 movhu dn,(abs32) -> movhu dn,(abs16) */
4094 case 0x81:
4095 case 0x82:
4096 case 0x83:
4097 /* Note that we've changed the relocation contents, etc. */
4098 elf_section_data (sec)->relocs = internal_relocs;
4099 elf_section_data (sec)->this_hdr.contents = contents;
4100 symtab_hdr->contents = (unsigned char *) isymbuf;
4101
4102 if ((code & 0xf3) == 0x81)
4103 code = 0x01 + (code & 0x0c);
4104 else if ((code & 0xf3) == 0x82)
4105 code = 0x02 + (code & 0x0c);
4106 else if ((code & 0xf3) == 0x83)
4107 code = 0x03 + (code & 0x0c);
4108 else
4109 abort ();
4110
4111 /* Fix the opcode. */
4112 bfd_put_8 (abfd, code, contents + irel->r_offset - 2);
4113
4114 /* Fix the relocation's type. */
4115 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
4116 (ELF32_R_TYPE (irel->r_info)
4117 == (int) R_MN10300_GOTOFF32)
4118 ? R_MN10300_GOTOFF16
4119 : (ELF32_R_TYPE (irel->r_info)
4120 == (int) R_MN10300_GOT32)
4121 ? R_MN10300_GOT16
4122 : (ELF32_R_TYPE (irel->r_info)
4123 == (int) R_MN10300_GOTPC32)
4124 ? R_MN10300_GOTPC16 :
4125 R_MN10300_16);
4126
4127 /* The opcode got shorter too, so we have to fix the
4128 addend and offset too! */
4129 irel->r_offset -= 1;
4130
4131 /* Delete three bytes of data. */
4132 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
4133 irel->r_offset + 1, 3))
4134 goto error_return;
4135
4136 /* That will change things, so, we should relax again.
4137 Note that this is not required, and it may be slow. */
4138 *again = TRUE;
4139 break;
4140
4141 /* mov am,(abs32) -> mov am,(abs16)
4142 mov am,(d32,sp) -> mov am,(d16,sp)
4143 mov dm,(d32,sp) -> mov dm,(d32,sp)
4144 movbu dm,(d32,sp) -> movbu dm,(d32,sp)
4145 movhu dm,(d32,sp) -> movhu dm,(d32,sp) */
4146 case 0x80:
4147 case 0x90:
4148 case 0x91:
4149 case 0x92:
4150 case 0x93:
4151 /* sp-based offsets are zero-extended. */
4152 if (code >= 0x90 && code <= 0x93
4153 && (long) value < 0)
4154 continue;
4155
4156 /* Note that we've changed the relocation contents, etc. */
4157 elf_section_data (sec)->relocs = internal_relocs;
4158 elf_section_data (sec)->this_hdr.contents = contents;
4159 symtab_hdr->contents = (unsigned char *) isymbuf;
4160
4161 /* Fix the opcode. */
4162 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
4163 bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
4164
4165 /* Fix the relocation's type. */
4166 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
4167 (ELF32_R_TYPE (irel->r_info)
4168 == (int) R_MN10300_GOTOFF32)
4169 ? R_MN10300_GOTOFF16
4170 : (ELF32_R_TYPE (irel->r_info)
4171 == (int) R_MN10300_GOT32)
4172 ? R_MN10300_GOT16
4173 : (ELF32_R_TYPE (irel->r_info)
4174 == (int) R_MN10300_GOTPC32)
4175 ? R_MN10300_GOTPC16 :
4176 R_MN10300_16);
4177
4178 /* Delete two bytes of data. */
4179 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
4180 irel->r_offset + 2, 2))
4181 goto error_return;
4182
4183 /* That will change things, so, we should relax again.
4184 Note that this is not required, and it may be slow. */
4185 *again = TRUE;
4186 break;
4187 }
4188 else if ((code & 0xf0) < 0xf0)
4189 switch (code & 0xfc)
4190 {
4191 /* mov imm32,dn -> mov imm16,dn
4192 mov imm32,an -> mov imm16,an
4193 mov (abs32),dn -> mov (abs16),dn
4194 movbu (abs32),dn -> movbu (abs16),dn
4195 movhu (abs32),dn -> movhu (abs16),dn */
4196 case 0xcc:
4197 case 0xdc:
4198 case 0xa4:
4199 case 0xa8:
4200 case 0xac:
4201 /* Not safe if the high bit is on as relaxing may
4202 move the value out of high mem and thus not fit
4203 in a signed 16bit value. */
4204 if (code == 0xcc
4205 && (value & 0x8000))
4206 continue;
4207
4208 /* "mov imm16, an" zero-extends the immediate. */
4209 if ((code & 0xfc) == 0xdc
4210 && (long) value < 0)
4211 continue;
4212
4213 /* Note that we've changed the relocation contents, etc. */
4214 elf_section_data (sec)->relocs = internal_relocs;
4215 elf_section_data (sec)->this_hdr.contents = contents;
4216 symtab_hdr->contents = (unsigned char *) isymbuf;
4217
4218 if ((code & 0xfc) == 0xcc)
4219 code = 0x2c + (code & 0x03);
4220 else if ((code & 0xfc) == 0xdc)
4221 code = 0x24 + (code & 0x03);
4222 else if ((code & 0xfc) == 0xa4)
4223 code = 0x30 + (code & 0x03);
4224 else if ((code & 0xfc) == 0xa8)
4225 code = 0x34 + (code & 0x03);
4226 else if ((code & 0xfc) == 0xac)
4227 code = 0x38 + (code & 0x03);
4228 else
4229 abort ();
4230
4231 /* Fix the opcode. */
4232 bfd_put_8 (abfd, code, contents + irel->r_offset - 2);
4233
4234 /* Fix the relocation's type. */
4235 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
4236 (ELF32_R_TYPE (irel->r_info)
4237 == (int) R_MN10300_GOTOFF32)
4238 ? R_MN10300_GOTOFF16
4239 : (ELF32_R_TYPE (irel->r_info)
4240 == (int) R_MN10300_GOT32)
4241 ? R_MN10300_GOT16
4242 : (ELF32_R_TYPE (irel->r_info)
4243 == (int) R_MN10300_GOTPC32)
4244 ? R_MN10300_GOTPC16 :
4245 R_MN10300_16);
4246
4247 /* The opcode got shorter too, so we have to fix the
4248 addend and offset too! */
4249 irel->r_offset -= 1;
4250
4251 /* Delete three bytes of data. */
4252 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
4253 irel->r_offset + 1, 3))
4254 goto error_return;
4255
4256 /* That will change things, so, we should relax again.
4257 Note that this is not required, and it may be slow. */
4258 *again = TRUE;
4259 break;
4260
4261 /* mov (abs32),an -> mov (abs16),an
4262 mov (d32,sp),an -> mov (d16,sp),an
4263 mov (d32,sp),dn -> mov (d16,sp),dn
4264 movbu (d32,sp),dn -> movbu (d16,sp),dn
4265 movhu (d32,sp),dn -> movhu (d16,sp),dn
4266 add imm32,dn -> add imm16,dn
4267 cmp imm32,dn -> cmp imm16,dn
4268 add imm32,an -> add imm16,an
4269 cmp imm32,an -> cmp imm16,an
4270 and imm32,dn -> and imm16,dn
4271 or imm32,dn -> or imm16,dn
4272 xor imm32,dn -> xor imm16,dn
4273 btst imm32,dn -> btst imm16,dn */
4274
4275 case 0xa0:
4276 case 0xb0:
4277 case 0xb1:
4278 case 0xb2:
4279 case 0xb3:
4280 case 0xc0:
4281 case 0xc8:
4282
4283 case 0xd0:
4284 case 0xd8:
4285 case 0xe0:
4286 case 0xe1:
4287 case 0xe2:
4288 case 0xe3:
4289 /* cmp imm16, an zero-extends the immediate. */
4290 if (code == 0xdc
4291 && (long) value < 0)
4292 continue;
4293
4294 /* So do sp-based offsets. */
4295 if (code >= 0xb0 && code <= 0xb3
4296 && (long) value < 0)
4297 continue;
4298
4299 /* Note that we've changed the relocation contents, etc. */
4300 elf_section_data (sec)->relocs = internal_relocs;
4301 elf_section_data (sec)->this_hdr.contents = contents;
4302 symtab_hdr->contents = (unsigned char *) isymbuf;
4303
4304 /* Fix the opcode. */
4305 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
4306 bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
4307
4308 /* Fix the relocation's type. */
4309 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
4310 (ELF32_R_TYPE (irel->r_info)
4311 == (int) R_MN10300_GOTOFF32)
4312 ? R_MN10300_GOTOFF16
4313 : (ELF32_R_TYPE (irel->r_info)
4314 == (int) R_MN10300_GOT32)
4315 ? R_MN10300_GOT16
4316 : (ELF32_R_TYPE (irel->r_info)
4317 == (int) R_MN10300_GOTPC32)
4318 ? R_MN10300_GOTPC16 :
4319 R_MN10300_16);
4320
4321 /* Delete two bytes of data. */
4322 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
4323 irel->r_offset + 2, 2))
4324 goto error_return;
4325
4326 /* That will change things, so, we should relax again.
4327 Note that this is not required, and it may be slow. */
4328 *again = TRUE;
4329 break;
4330 }
4331 else if (code == 0xfe)
4332 {
4333 /* add imm32,sp -> add imm16,sp */
4334
4335 /* Note that we've changed the relocation contents, etc. */
4336 elf_section_data (sec)->relocs = internal_relocs;
4337 elf_section_data (sec)->this_hdr.contents = contents;
4338 symtab_hdr->contents = (unsigned char *) isymbuf;
4339
4340 /* Fix the opcode. */
4341 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
4342 bfd_put_8 (abfd, 0xfe, contents + irel->r_offset - 1);
4343
4344 /* Fix the relocation's type. */
4345 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
4346 (ELF32_R_TYPE (irel->r_info)
4347 == (int) R_MN10300_GOT32)
4348 ? R_MN10300_GOT16
4349 : (ELF32_R_TYPE (irel->r_info)
4350 == (int) R_MN10300_GOTOFF32)
4351 ? R_MN10300_GOTOFF16
4352 : (ELF32_R_TYPE (irel->r_info)
4353 == (int) R_MN10300_GOTPC32)
4354 ? R_MN10300_GOTPC16 :
4355 R_MN10300_16);
4356
4357 /* Delete two bytes of data. */
4358 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
4359 irel->r_offset + 2, 2))
4360 goto error_return;
4361
4362 /* That will change things, so, we should relax again.
4363 Note that this is not required, and it may be slow. */
4364 *again = TRUE;
4365 break;
4366 }
4367 }
4368 }
4369 }
4370
4371 if (isymbuf != NULL
4372 && symtab_hdr->contents != (unsigned char *) isymbuf)
4373 {
4374 if (! link_info->keep_memory)
4375 free (isymbuf);
4376 else
4377 {
4378 /* Cache the symbols for elf_link_input_bfd. */
4379 symtab_hdr->contents = (unsigned char *) isymbuf;
4380 }
4381 }
4382
4383 if (contents != NULL
4384 && elf_section_data (sec)->this_hdr.contents != contents)
4385 {
4386 if (! link_info->keep_memory)
4387 free (contents);
4388 else
4389 {
4390 /* Cache the section contents for elf_link_input_bfd. */
4391 elf_section_data (sec)->this_hdr.contents = contents;
4392 }
4393 }
4394
4395 if (elf_section_data (sec)->relocs != internal_relocs)
4396 free (internal_relocs);
4397
4398 return TRUE;
4399
4400 error_return:
4401 if (symtab_hdr->contents != (unsigned char *) isymbuf)
4402 free (isymbuf);
4403 if (elf_section_data (section)->this_hdr.contents != contents)
4404 free (contents);
4405 if (elf_section_data (section)->relocs != internal_relocs)
4406 free (internal_relocs);
4407
4408 return FALSE;
4409 }
4410
4411 /* This is a version of bfd_generic_get_relocated_section_contents
4412 which uses mn10300_elf_relocate_section. */
4413
4414 static bfd_byte *
4415 mn10300_elf_get_relocated_section_contents (bfd *output_bfd,
4416 struct bfd_link_info *link_info,
4417 struct bfd_link_order *link_order,
4418 bfd_byte *data,
4419 bfd_boolean relocatable,
4420 asymbol **symbols)
4421 {
4422 Elf_Internal_Shdr *symtab_hdr;
4423 asection *input_section = link_order->u.indirect.section;
4424 bfd *input_bfd = input_section->owner;
4425 asection **sections = NULL;
4426 Elf_Internal_Rela *internal_relocs = NULL;
4427 Elf_Internal_Sym *isymbuf = NULL;
4428
4429 /* We only need to handle the case of relaxing, or of having a
4430 particular set of section contents, specially. */
4431 if (relocatable
4432 || elf_section_data (input_section)->this_hdr.contents == NULL)
4433 return bfd_generic_get_relocated_section_contents (output_bfd, link_info,
4434 link_order, data,
4435 relocatable,
4436 symbols);
4437
4438 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
4439
4440 memcpy (data, elf_section_data (input_section)->this_hdr.contents,
4441 (size_t) input_section->size);
4442
4443 if ((input_section->flags & SEC_RELOC) != 0
4444 && input_section->reloc_count > 0)
4445 {
4446 asection **secpp;
4447 Elf_Internal_Sym *isym, *isymend;
4448 bfd_size_type amt;
4449
4450 internal_relocs = _bfd_elf_link_read_relocs (input_bfd, input_section,
4451 NULL, NULL, FALSE);
4452 if (internal_relocs == NULL)
4453 goto error_return;
4454
4455 if (symtab_hdr->sh_info != 0)
4456 {
4457 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
4458 if (isymbuf == NULL)
4459 isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
4460 symtab_hdr->sh_info, 0,
4461 NULL, NULL, NULL);
4462 if (isymbuf == NULL)
4463 goto error_return;
4464 }
4465
4466 amt = symtab_hdr->sh_info;
4467 amt *= sizeof (asection *);
4468 sections = bfd_malloc (amt);
4469 if (sections == NULL && amt != 0)
4470 goto error_return;
4471
4472 isymend = isymbuf + symtab_hdr->sh_info;
4473 for (isym = isymbuf, secpp = sections; isym < isymend; ++isym, ++secpp)
4474 {
4475 asection *isec;
4476
4477 if (isym->st_shndx == SHN_UNDEF)
4478 isec = bfd_und_section_ptr;
4479 else if (isym->st_shndx == SHN_ABS)
4480 isec = bfd_abs_section_ptr;
4481 else if (isym->st_shndx == SHN_COMMON)
4482 isec = bfd_com_section_ptr;
4483 else
4484 isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx);
4485
4486 *secpp = isec;
4487 }
4488
4489 if (! mn10300_elf_relocate_section (output_bfd, link_info, input_bfd,
4490 input_section, data, internal_relocs,
4491 isymbuf, sections))
4492 goto error_return;
4493
4494 free (sections);
4495 if (symtab_hdr->contents != (unsigned char *) isymbuf)
4496 free (isymbuf);
4497 if (internal_relocs != elf_section_data (input_section)->relocs)
4498 free (internal_relocs);
4499 }
4500
4501 return data;
4502
4503 error_return:
4504 free (sections);
4505 if (symtab_hdr->contents != (unsigned char *) isymbuf)
4506 free (isymbuf);
4507 if (internal_relocs != elf_section_data (input_section)->relocs)
4508 free (internal_relocs);
4509 return NULL;
4510 }
4511
4512 /* Assorted hash table functions. */
4513
4514 /* Initialize an entry in the link hash table. */
4515
4516 /* Create an entry in an MN10300 ELF linker hash table. */
4517
4518 static struct bfd_hash_entry *
4519 elf32_mn10300_link_hash_newfunc (struct bfd_hash_entry *entry,
4520 struct bfd_hash_table *table,
4521 const char *string)
4522 {
4523 struct elf32_mn10300_link_hash_entry *ret =
4524 (struct elf32_mn10300_link_hash_entry *) entry;
4525
4526 /* Allocate the structure if it has not already been allocated by a
4527 subclass. */
4528 if (ret == NULL)
4529 ret = (struct elf32_mn10300_link_hash_entry *)
4530 bfd_hash_allocate (table, sizeof (* ret));
4531 if (ret == NULL)
4532 return (struct bfd_hash_entry *) ret;
4533
4534 /* Call the allocation method of the superclass. */
4535 ret = (struct elf32_mn10300_link_hash_entry *)
4536 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
4537 table, string);
4538 if (ret != NULL)
4539 {
4540 ret->direct_calls = 0;
4541 ret->stack_size = 0;
4542 ret->movm_args = 0;
4543 ret->movm_stack_size = 0;
4544 ret->flags = 0;
4545 ret->value = 0;
4546 ret->tls_type = GOT_UNKNOWN;
4547 }
4548
4549 return (struct bfd_hash_entry *) ret;
4550 }
4551
4552 static void
4553 _bfd_mn10300_copy_indirect_symbol (struct bfd_link_info * info,
4554 struct elf_link_hash_entry * dir,
4555 struct elf_link_hash_entry * ind)
4556 {
4557 struct elf32_mn10300_link_hash_entry * edir;
4558 struct elf32_mn10300_link_hash_entry * eind;
4559
4560 edir = elf_mn10300_hash_entry (dir);
4561 eind = elf_mn10300_hash_entry (ind);
4562
4563 if (ind->root.type == bfd_link_hash_indirect
4564 && dir->got.refcount <= 0)
4565 {
4566 edir->tls_type = eind->tls_type;
4567 eind->tls_type = GOT_UNKNOWN;
4568 }
4569 edir->direct_calls = eind->direct_calls;
4570 edir->stack_size = eind->stack_size;
4571 edir->movm_args = eind->movm_args;
4572 edir->movm_stack_size = eind->movm_stack_size;
4573 edir->flags = eind->flags;
4574
4575 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
4576 }
4577
4578 /* Destroy an mn10300 ELF linker hash table. */
4579
4580 static void
4581 elf32_mn10300_link_hash_table_free (bfd *obfd)
4582 {
4583 struct elf32_mn10300_link_hash_table *ret
4584 = (struct elf32_mn10300_link_hash_table *) obfd->link.hash;
4585
4586 obfd->link.hash = &ret->static_hash_table->root.root;
4587 _bfd_elf_link_hash_table_free (obfd);
4588 obfd->is_linker_output = TRUE;
4589 obfd->link.hash = &ret->root.root;
4590 _bfd_elf_link_hash_table_free (obfd);
4591 }
4592
4593 /* Create an mn10300 ELF linker hash table. */
4594
4595 static struct bfd_link_hash_table *
4596 elf32_mn10300_link_hash_table_create (bfd *abfd)
4597 {
4598 struct elf32_mn10300_link_hash_table *ret;
4599 size_t amt = sizeof (* ret);
4600
4601 ret = bfd_zmalloc (amt);
4602 if (ret == NULL)
4603 return NULL;
4604
4605 amt = sizeof (struct elf_link_hash_table);
4606 ret->static_hash_table = bfd_zmalloc (amt);
4607 if (ret->static_hash_table == NULL)
4608 {
4609 free (ret);
4610 return NULL;
4611 }
4612
4613 if (!_bfd_elf_link_hash_table_init (&ret->static_hash_table->root, abfd,
4614 elf32_mn10300_link_hash_newfunc,
4615 sizeof (struct elf32_mn10300_link_hash_entry),
4616 MN10300_ELF_DATA))
4617 {
4618 free (ret->static_hash_table);
4619 free (ret);
4620 return NULL;
4621 }
4622
4623 abfd->is_linker_output = FALSE;
4624 abfd->link.hash = NULL;
4625 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
4626 elf32_mn10300_link_hash_newfunc,
4627 sizeof (struct elf32_mn10300_link_hash_entry),
4628 MN10300_ELF_DATA))
4629 {
4630 abfd->is_linker_output = TRUE;
4631 abfd->link.hash = &ret->static_hash_table->root.root;
4632 _bfd_elf_link_hash_table_free (abfd);
4633 free (ret);
4634 return NULL;
4635 }
4636 ret->root.root.hash_table_free = elf32_mn10300_link_hash_table_free;
4637
4638 ret->tls_ldm_got.offset = -1;
4639
4640 return & ret->root.root;
4641 }
4642
4643 static unsigned long
4644 elf_mn10300_mach (flagword flags)
4645 {
4646 switch (flags & EF_MN10300_MACH)
4647 {
4648 case E_MN10300_MACH_MN10300:
4649 default:
4650 return bfd_mach_mn10300;
4651
4652 case E_MN10300_MACH_AM33:
4653 return bfd_mach_am33;
4654
4655 case E_MN10300_MACH_AM33_2:
4656 return bfd_mach_am33_2;
4657 }
4658 }
4659
4660 /* The final processing done just before writing out a MN10300 ELF object
4661 file. This gets the MN10300 architecture right based on the machine
4662 number. */
4663
4664 static bfd_boolean
4665 _bfd_mn10300_elf_final_write_processing (bfd *abfd)
4666 {
4667 unsigned long val;
4668
4669 switch (bfd_get_mach (abfd))
4670 {
4671 default:
4672 case bfd_mach_mn10300:
4673 val = E_MN10300_MACH_MN10300;
4674 break;
4675
4676 case bfd_mach_am33:
4677 val = E_MN10300_MACH_AM33;
4678 break;
4679
4680 case bfd_mach_am33_2:
4681 val = E_MN10300_MACH_AM33_2;
4682 break;
4683 }
4684
4685 elf_elfheader (abfd)->e_flags &= ~ (EF_MN10300_MACH);
4686 elf_elfheader (abfd)->e_flags |= val;
4687 return _bfd_elf_final_write_processing (abfd);
4688 }
4689
4690 static bfd_boolean
4691 _bfd_mn10300_elf_object_p (bfd *abfd)
4692 {
4693 bfd_default_set_arch_mach (abfd, bfd_arch_mn10300,
4694 elf_mn10300_mach (elf_elfheader (abfd)->e_flags));
4695 return TRUE;
4696 }
4697
4698 /* Merge backend specific data from an object file to the output
4699 object file when linking. */
4700
4701 static bfd_boolean
4702 _bfd_mn10300_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
4703 {
4704 bfd *obfd = info->output_bfd;
4705
4706 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4707 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4708 return TRUE;
4709
4710 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
4711 && bfd_get_mach (obfd) < bfd_get_mach (ibfd))
4712 {
4713 if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd),
4714 bfd_get_mach (ibfd)))
4715 return FALSE;
4716 }
4717
4718 return TRUE;
4719 }
4720
4721 #define PLT0_ENTRY_SIZE 15
4722 #define PLT_ENTRY_SIZE 20
4723 #define PIC_PLT_ENTRY_SIZE 24
4724
4725 static const bfd_byte elf_mn10300_plt0_entry[PLT0_ENTRY_SIZE] =
4726 {
4727 0xfc, 0xa0, 0, 0, 0, 0, /* mov (.got+8),a0 */
4728 0xfe, 0xe, 0x10, 0, 0, 0, 0, /* mov (.got+4),r1 */
4729 0xf0, 0xf4, /* jmp (a0) */
4730 };
4731
4732 static const bfd_byte elf_mn10300_plt_entry[PLT_ENTRY_SIZE] =
4733 {
4734 0xfc, 0xa0, 0, 0, 0, 0, /* mov (nameN@GOT + .got),a0 */
4735 0xf0, 0xf4, /* jmp (a0) */
4736 0xfe, 8, 0, 0, 0, 0, 0, /* mov reloc-table-address,r0 */
4737 0xdc, 0, 0, 0, 0, /* jmp .plt0 */
4738 };
4739
4740 static const bfd_byte elf_mn10300_pic_plt_entry[PIC_PLT_ENTRY_SIZE] =
4741 {
4742 0xfc, 0x22, 0, 0, 0, 0, /* mov (nameN@GOT,a2),a0 */
4743 0xf0, 0xf4, /* jmp (a0) */
4744 0xfe, 8, 0, 0, 0, 0, 0, /* mov reloc-table-address,r0 */
4745 0xf8, 0x22, 8, /* mov (8,a2),a0 */
4746 0xfb, 0xa, 0x1a, 4, /* mov (4,a2),r1 */
4747 0xf0, 0xf4, /* jmp (a0) */
4748 };
4749
4750 /* Return size of the first PLT entry. */
4751 #define elf_mn10300_sizeof_plt0(info) \
4752 (bfd_link_pic (info) ? PIC_PLT_ENTRY_SIZE : PLT0_ENTRY_SIZE)
4753
4754 /* Return size of a PLT entry. */
4755 #define elf_mn10300_sizeof_plt(info) \
4756 (bfd_link_pic (info) ? PIC_PLT_ENTRY_SIZE : PLT_ENTRY_SIZE)
4757
4758 /* Return offset of the PLT0 address in an absolute PLT entry. */
4759 #define elf_mn10300_plt_plt0_offset(info) 16
4760
4761 /* Return offset of the linker in PLT0 entry. */
4762 #define elf_mn10300_plt0_linker_offset(info) 2
4763
4764 /* Return offset of the GOT id in PLT0 entry. */
4765 #define elf_mn10300_plt0_gotid_offset(info) 9
4766
4767 /* Return offset of the temporary in PLT entry. */
4768 #define elf_mn10300_plt_temp_offset(info) 8
4769
4770 /* Return offset of the symbol in PLT entry. */
4771 #define elf_mn10300_plt_symbol_offset(info) 2
4772
4773 /* Return offset of the relocation in PLT entry. */
4774 #define elf_mn10300_plt_reloc_offset(info) 11
4775
4776 /* The name of the dynamic interpreter. This is put in the .interp
4777 section. */
4778
4779 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
4780
4781 /* Create dynamic sections when linking against a dynamic object. */
4782
4783 static bfd_boolean
4784 _bfd_mn10300_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
4785 {
4786 flagword flags;
4787 asection * s;
4788 const struct elf_backend_data * bed = get_elf_backend_data (abfd);
4789 struct elf32_mn10300_link_hash_table *htab = elf32_mn10300_hash_table (info);
4790 int ptralign = 0;
4791
4792 switch (bed->s->arch_size)
4793 {
4794 case 32:
4795 ptralign = 2;
4796 break;
4797
4798 case 64:
4799 ptralign = 3;
4800 break;
4801
4802 default:
4803 bfd_set_error (bfd_error_bad_value);
4804 return FALSE;
4805 }
4806
4807 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
4808 .rel[a].bss sections. */
4809 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4810 | SEC_LINKER_CREATED);
4811
4812 s = bfd_make_section_anyway_with_flags (abfd,
4813 (bed->default_use_rela_p
4814 ? ".rela.plt" : ".rel.plt"),
4815 flags | SEC_READONLY);
4816 htab->root.srelplt = s;
4817 if (s == NULL
4818 || !bfd_set_section_alignment (s, ptralign))
4819 return FALSE;
4820
4821 if (! _bfd_mn10300_elf_create_got_section (abfd, info))
4822 return FALSE;
4823
4824 if (bed->want_dynbss)
4825 {
4826 /* The .dynbss section is a place to put symbols which are defined
4827 by dynamic objects, are referenced by regular objects, and are
4828 not functions. We must allocate space for them in the process
4829 image and use a R_*_COPY reloc to tell the dynamic linker to
4830 initialize them at run time. The linker script puts the .dynbss
4831 section into the .bss section of the final image. */
4832 s = bfd_make_section_anyway_with_flags (abfd, ".dynbss",
4833 SEC_ALLOC | SEC_LINKER_CREATED);
4834 if (s == NULL)
4835 return FALSE;
4836
4837 /* The .rel[a].bss section holds copy relocs. This section is not
4838 normally needed. We need to create it here, though, so that the
4839 linker will map it to an output section. We can't just create it
4840 only if we need it, because we will not know whether we need it
4841 until we have seen all the input files, and the first time the
4842 main linker code calls BFD after examining all the input files
4843 (size_dynamic_sections) the input sections have already been
4844 mapped to the output sections. If the section turns out not to
4845 be needed, we can discard it later. We will never need this
4846 section when generating a shared object, since they do not use
4847 copy relocs. */
4848 if (! bfd_link_pic (info))
4849 {
4850 s = bfd_make_section_anyway_with_flags (abfd,
4851 (bed->default_use_rela_p
4852 ? ".rela.bss" : ".rel.bss"),
4853 flags | SEC_READONLY);
4854 if (s == NULL
4855 || !bfd_set_section_alignment (s, ptralign))
4856 return FALSE;
4857 }
4858 }
4859
4860 return TRUE;
4861 }
4862 \f
4863 /* Adjust a symbol defined by a dynamic object and referenced by a
4864 regular object. The current definition is in some section of the
4865 dynamic object, but we're not including those sections. We have to
4866 change the definition to something the rest of the link can
4867 understand. */
4868
4869 static bfd_boolean
4870 _bfd_mn10300_elf_adjust_dynamic_symbol (struct bfd_link_info * info,
4871 struct elf_link_hash_entry * h)
4872 {
4873 struct elf32_mn10300_link_hash_table *htab = elf32_mn10300_hash_table (info);
4874 bfd * dynobj;
4875 asection * s;
4876
4877 dynobj = htab->root.dynobj;
4878
4879 /* Make sure we know what is going on here. */
4880 BFD_ASSERT (dynobj != NULL
4881 && (h->needs_plt
4882 || h->is_weakalias
4883 || (h->def_dynamic
4884 && h->ref_regular
4885 && !h->def_regular)));
4886
4887 /* If this is a function, put it in the procedure linkage table. We
4888 will fill in the contents of the procedure linkage table later,
4889 when we know the address of the .got section. */
4890 if (h->type == STT_FUNC
4891 || h->needs_plt)
4892 {
4893 if (! bfd_link_pic (info)
4894 && !h->def_dynamic
4895 && !h->ref_dynamic)
4896 {
4897 /* This case can occur if we saw a PLT reloc in an input
4898 file, but the symbol was never referred to by a dynamic
4899 object. In such a case, we don't actually need to build
4900 a procedure linkage table, and we can just do a REL32
4901 reloc instead. */
4902 BFD_ASSERT (h->needs_plt);
4903 return TRUE;
4904 }
4905
4906 /* Make sure this symbol is output as a dynamic symbol. */
4907 if (h->dynindx == -1)
4908 {
4909 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4910 return FALSE;
4911 }
4912
4913 s = htab->root.splt;
4914 BFD_ASSERT (s != NULL);
4915
4916 /* If this is the first .plt entry, make room for the special
4917 first entry. */
4918 if (s->size == 0)
4919 s->size += elf_mn10300_sizeof_plt0 (info);
4920
4921 /* If this symbol is not defined in a regular file, and we are
4922 not generating a shared library, then set the symbol to this
4923 location in the .plt. This is required to make function
4924 pointers compare as equal between the normal executable and
4925 the shared library. */
4926 if (! bfd_link_pic (info)
4927 && !h->def_regular)
4928 {
4929 h->root.u.def.section = s;
4930 h->root.u.def.value = s->size;
4931 }
4932
4933 h->plt.offset = s->size;
4934
4935 /* Make room for this entry. */
4936 s->size += elf_mn10300_sizeof_plt (info);
4937
4938 /* We also need to make an entry in the .got.plt section, which
4939 will be placed in the .got section by the linker script. */
4940 s = htab->root.sgotplt;
4941 BFD_ASSERT (s != NULL);
4942 s->size += 4;
4943
4944 /* We also need to make an entry in the .rela.plt section. */
4945 s = htab->root.srelplt;
4946 BFD_ASSERT (s != NULL);
4947 s->size += sizeof (Elf32_External_Rela);
4948
4949 return TRUE;
4950 }
4951
4952 /* If this is a weak symbol, and there is a real definition, the
4953 processor independent code will have arranged for us to see the
4954 real definition first, and we can just use the same value. */
4955 if (h->is_weakalias)
4956 {
4957 struct elf_link_hash_entry *def = weakdef (h);
4958 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
4959 h->root.u.def.section = def->root.u.def.section;
4960 h->root.u.def.value = def->root.u.def.value;
4961 return TRUE;
4962 }
4963
4964 /* This is a reference to a symbol defined by a dynamic object which
4965 is not a function. */
4966
4967 /* If we are creating a shared library, we must presume that the
4968 only references to the symbol are via the global offset table.
4969 For such cases we need not do anything here; the relocations will
4970 be handled correctly by relocate_section. */
4971 if (bfd_link_pic (info))
4972 return TRUE;
4973
4974 /* If there are no references to this symbol that do not use the
4975 GOT, we don't need to generate a copy reloc. */
4976 if (!h->non_got_ref)
4977 return TRUE;
4978
4979 /* We must allocate the symbol in our .dynbss section, which will
4980 become part of the .bss section of the executable. There will be
4981 an entry for this symbol in the .dynsym section. The dynamic
4982 object will contain position independent code, so all references
4983 from the dynamic object to this symbol will go through the global
4984 offset table. The dynamic linker will use the .dynsym entry to
4985 determine the address it must put in the global offset table, so
4986 both the dynamic object and the regular object will refer to the
4987 same memory location for the variable. */
4988
4989 s = bfd_get_linker_section (dynobj, ".dynbss");
4990 BFD_ASSERT (s != NULL);
4991
4992 /* We must generate a R_MN10300_COPY reloc to tell the dynamic linker to
4993 copy the initial value out of the dynamic object and into the
4994 runtime process image. We need to remember the offset into the
4995 .rela.bss section we are going to use. */
4996 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
4997 {
4998 asection * srel;
4999
5000 srel = bfd_get_linker_section (dynobj, ".rela.bss");
5001 BFD_ASSERT (srel != NULL);
5002 srel->size += sizeof (Elf32_External_Rela);
5003 h->needs_copy = 1;
5004 }
5005
5006 return _bfd_elf_adjust_dynamic_copy (info, h, s);
5007 }
5008
5009 /* Set the sizes of the dynamic sections. */
5010
5011 static bfd_boolean
5012 _bfd_mn10300_elf_size_dynamic_sections (bfd * output_bfd,
5013 struct bfd_link_info * info)
5014 {
5015 struct elf32_mn10300_link_hash_table *htab = elf32_mn10300_hash_table (info);
5016 bfd * dynobj;
5017 asection * s;
5018 bfd_boolean relocs;
5019
5020 dynobj = htab->root.dynobj;
5021 BFD_ASSERT (dynobj != NULL);
5022
5023 if (elf_hash_table (info)->dynamic_sections_created)
5024 {
5025 /* Set the contents of the .interp section to the interpreter. */
5026 if (bfd_link_executable (info) && !info->nointerp)
5027 {
5028 s = bfd_get_linker_section (dynobj, ".interp");
5029 BFD_ASSERT (s != NULL);
5030 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
5031 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5032 }
5033 }
5034 else
5035 {
5036 /* We may have created entries in the .rela.got section.
5037 However, if we are not creating the dynamic sections, we will
5038 not actually use these entries. Reset the size of .rela.got,
5039 which will cause it to get stripped from the output file
5040 below. */
5041 s = htab->root.sgot;
5042 if (s != NULL)
5043 s->size = 0;
5044 }
5045
5046 if (htab->tls_ldm_got.refcount > 0)
5047 {
5048 s = htab->root.srelgot;
5049 BFD_ASSERT (s != NULL);
5050 s->size += sizeof (Elf32_External_Rela);
5051 }
5052
5053 /* The check_relocs and adjust_dynamic_symbol entry points have
5054 determined the sizes of the various dynamic sections. Allocate
5055 memory for them. */
5056 relocs = FALSE;
5057 for (s = dynobj->sections; s != NULL; s = s->next)
5058 {
5059 const char * name;
5060
5061 if ((s->flags & SEC_LINKER_CREATED) == 0)
5062 continue;
5063
5064 /* It's OK to base decisions on the section name, because none
5065 of the dynobj section names depend upon the input files. */
5066 name = bfd_section_name (s);
5067
5068 if (streq (name, ".plt"))
5069 {
5070 /* Remember whether there is a PLT. */
5071 ;
5072 }
5073 else if (CONST_STRNEQ (name, ".rela"))
5074 {
5075 if (s->size != 0)
5076 {
5077 /* Remember whether there are any reloc sections other
5078 than .rela.plt. */
5079 if (! streq (name, ".rela.plt"))
5080 relocs = TRUE;
5081
5082 /* We use the reloc_count field as a counter if we need
5083 to copy relocs into the output file. */
5084 s->reloc_count = 0;
5085 }
5086 }
5087 else if (! CONST_STRNEQ (name, ".got")
5088 && ! streq (name, ".dynbss"))
5089 /* It's not one of our sections, so don't allocate space. */
5090 continue;
5091
5092 if (s->size == 0)
5093 {
5094 /* If we don't need this section, strip it from the
5095 output file. This is mostly to handle .rela.bss and
5096 .rela.plt. We must create both sections in
5097 create_dynamic_sections, because they must be created
5098 before the linker maps input sections to output
5099 sections. The linker does that before
5100 adjust_dynamic_symbol is called, and it is that
5101 function which decides whether anything needs to go
5102 into these sections. */
5103 s->flags |= SEC_EXCLUDE;
5104 continue;
5105 }
5106
5107 if ((s->flags & SEC_HAS_CONTENTS) == 0)
5108 continue;
5109
5110 /* Allocate memory for the section contents. We use bfd_zalloc
5111 here in case unused entries are not reclaimed before the
5112 section's contents are written out. This should not happen,
5113 but this way if it does, we get a R_MN10300_NONE reloc
5114 instead of garbage. */
5115 s->contents = bfd_zalloc (dynobj, s->size);
5116 if (s->contents == NULL)
5117 return FALSE;
5118 }
5119
5120 return _bfd_elf_add_dynamic_tags (output_bfd, info, relocs);
5121 }
5122
5123 /* Finish up dynamic symbol handling. We set the contents of various
5124 dynamic sections here. */
5125
5126 static bfd_boolean
5127 _bfd_mn10300_elf_finish_dynamic_symbol (bfd * output_bfd,
5128 struct bfd_link_info * info,
5129 struct elf_link_hash_entry * h,
5130 Elf_Internal_Sym * sym)
5131 {
5132 struct elf32_mn10300_link_hash_table *htab = elf32_mn10300_hash_table (info);
5133 bfd * dynobj;
5134
5135 dynobj = htab->root.dynobj;
5136
5137 if (h->plt.offset != (bfd_vma) -1)
5138 {
5139 asection * splt;
5140 asection * sgot;
5141 asection * srel;
5142 bfd_vma plt_index;
5143 bfd_vma got_offset;
5144 Elf_Internal_Rela rel;
5145
5146 /* This symbol has an entry in the procedure linkage table. Set
5147 it up. */
5148
5149 BFD_ASSERT (h->dynindx != -1);
5150
5151 splt = htab->root.splt;
5152 sgot = htab->root.sgotplt;
5153 srel = htab->root.srelplt;
5154 BFD_ASSERT (splt != NULL && sgot != NULL && srel != NULL);
5155
5156 /* Get the index in the procedure linkage table which
5157 corresponds to this symbol. This is the index of this symbol
5158 in all the symbols for which we are making plt entries. The
5159 first entry in the procedure linkage table is reserved. */
5160 plt_index = ((h->plt.offset - elf_mn10300_sizeof_plt0 (info))
5161 / elf_mn10300_sizeof_plt (info));
5162
5163 /* Get the offset into the .got table of the entry that
5164 corresponds to this function. Each .got entry is 4 bytes.
5165 The first three are reserved. */
5166 got_offset = (plt_index + 3) * 4;
5167
5168 /* Fill in the entry in the procedure linkage table. */
5169 if (! bfd_link_pic (info))
5170 {
5171 memcpy (splt->contents + h->plt.offset, elf_mn10300_plt_entry,
5172 elf_mn10300_sizeof_plt (info));
5173 bfd_put_32 (output_bfd,
5174 (sgot->output_section->vma
5175 + sgot->output_offset
5176 + got_offset),
5177 (splt->contents + h->plt.offset
5178 + elf_mn10300_plt_symbol_offset (info)));
5179
5180 bfd_put_32 (output_bfd,
5181 (1 - h->plt.offset - elf_mn10300_plt_plt0_offset (info)),
5182 (splt->contents + h->plt.offset
5183 + elf_mn10300_plt_plt0_offset (info)));
5184 }
5185 else
5186 {
5187 memcpy (splt->contents + h->plt.offset, elf_mn10300_pic_plt_entry,
5188 elf_mn10300_sizeof_plt (info));
5189
5190 bfd_put_32 (output_bfd, got_offset,
5191 (splt->contents + h->plt.offset
5192 + elf_mn10300_plt_symbol_offset (info)));
5193 }
5194
5195 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
5196 (splt->contents + h->plt.offset
5197 + elf_mn10300_plt_reloc_offset (info)));
5198
5199 /* Fill in the entry in the global offset table. */
5200 bfd_put_32 (output_bfd,
5201 (splt->output_section->vma
5202 + splt->output_offset
5203 + h->plt.offset
5204 + elf_mn10300_plt_temp_offset (info)),
5205 sgot->contents + got_offset);
5206
5207 /* Fill in the entry in the .rela.plt section. */
5208 rel.r_offset = (sgot->output_section->vma
5209 + sgot->output_offset
5210 + got_offset);
5211 rel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_JMP_SLOT);
5212 rel.r_addend = 0;
5213 bfd_elf32_swap_reloca_out (output_bfd, &rel,
5214 (bfd_byte *) ((Elf32_External_Rela *) srel->contents
5215 + plt_index));
5216
5217 if (!h->def_regular)
5218 /* Mark the symbol as undefined, rather than as defined in
5219 the .plt section. Leave the value alone. */
5220 sym->st_shndx = SHN_UNDEF;
5221 }
5222
5223 if (h->got.offset != (bfd_vma) -1)
5224 {
5225 asection * sgot;
5226 asection * srel;
5227 Elf_Internal_Rela rel;
5228
5229 /* This symbol has an entry in the global offset table. Set it up. */
5230 sgot = htab->root.sgot;
5231 srel = htab->root.srelgot;
5232 BFD_ASSERT (sgot != NULL && srel != NULL);
5233
5234 rel.r_offset = (sgot->output_section->vma
5235 + sgot->output_offset
5236 + (h->got.offset & ~1));
5237
5238 switch (elf_mn10300_hash_entry (h)->tls_type)
5239 {
5240 case GOT_TLS_GD:
5241 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
5242 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset + 4);
5243 rel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_TLS_DTPMOD);
5244 rel.r_addend = 0;
5245 bfd_elf32_swap_reloca_out (output_bfd, & rel,
5246 (bfd_byte *) ((Elf32_External_Rela *) srel->contents
5247 + srel->reloc_count));
5248 ++ srel->reloc_count;
5249 rel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_TLS_DTPOFF);
5250 rel.r_offset += 4;
5251 rel.r_addend = 0;
5252 break;
5253
5254 case GOT_TLS_IE:
5255 /* We originally stored the addend in the GOT, but at this
5256 point, we want to move it to the reloc instead as that's
5257 where the dynamic linker wants it. */
5258 rel.r_addend = bfd_get_32 (output_bfd, sgot->contents + h->got.offset);
5259 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
5260 if (h->dynindx == -1)
5261 rel.r_info = ELF32_R_INFO (0, R_MN10300_TLS_TPOFF);
5262 else
5263 rel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_TLS_TPOFF);
5264 break;
5265
5266 default:
5267 /* If this is a -Bsymbolic link, and the symbol is defined
5268 locally, we just want to emit a RELATIVE reloc. Likewise if
5269 the symbol was forced to be local because of a version file.
5270 The entry in the global offset table will already have been
5271 initialized in the relocate_section function. */
5272 if (bfd_link_pic (info)
5273 && (info->symbolic || h->dynindx == -1)
5274 && h->def_regular)
5275 {
5276 rel.r_info = ELF32_R_INFO (0, R_MN10300_RELATIVE);
5277 rel.r_addend = (h->root.u.def.value
5278 + h->root.u.def.section->output_section->vma
5279 + h->root.u.def.section->output_offset);
5280 }
5281 else
5282 {
5283 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
5284 rel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_GLOB_DAT);
5285 rel.r_addend = 0;
5286 }
5287 }
5288
5289 if (ELF32_R_TYPE (rel.r_info) != R_MN10300_NONE)
5290 {
5291 bfd_elf32_swap_reloca_out (output_bfd, &rel,
5292 (bfd_byte *) ((Elf32_External_Rela *) srel->contents
5293 + srel->reloc_count));
5294 ++ srel->reloc_count;
5295 }
5296 }
5297
5298 if (h->needs_copy)
5299 {
5300 asection * s;
5301 Elf_Internal_Rela rel;
5302
5303 /* This symbol needs a copy reloc. Set it up. */
5304 BFD_ASSERT (h->dynindx != -1
5305 && (h->root.type == bfd_link_hash_defined
5306 || h->root.type == bfd_link_hash_defweak));
5307
5308 s = bfd_get_linker_section (dynobj, ".rela.bss");
5309 BFD_ASSERT (s != NULL);
5310
5311 rel.r_offset = (h->root.u.def.value
5312 + h->root.u.def.section->output_section->vma
5313 + h->root.u.def.section->output_offset);
5314 rel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_COPY);
5315 rel.r_addend = 0;
5316 bfd_elf32_swap_reloca_out (output_bfd, & rel,
5317 (bfd_byte *) ((Elf32_External_Rela *) s->contents
5318 + s->reloc_count));
5319 ++ s->reloc_count;
5320 }
5321
5322 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
5323 if (h == elf_hash_table (info)->hdynamic
5324 || h == elf_hash_table (info)->hgot)
5325 sym->st_shndx = SHN_ABS;
5326
5327 return TRUE;
5328 }
5329
5330 /* Finish up the dynamic sections. */
5331
5332 static bfd_boolean
5333 _bfd_mn10300_elf_finish_dynamic_sections (bfd * output_bfd,
5334 struct bfd_link_info * info)
5335 {
5336 bfd * dynobj;
5337 asection * sgot;
5338 asection * sdyn;
5339 struct elf32_mn10300_link_hash_table *htab = elf32_mn10300_hash_table (info);
5340
5341 dynobj = htab->root.dynobj;
5342 sgot = htab->root.sgotplt;
5343 BFD_ASSERT (sgot != NULL);
5344 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
5345
5346 if (elf_hash_table (info)->dynamic_sections_created)
5347 {
5348 asection * splt;
5349 Elf32_External_Dyn * dyncon;
5350 Elf32_External_Dyn * dynconend;
5351
5352 BFD_ASSERT (sdyn != NULL);
5353
5354 dyncon = (Elf32_External_Dyn *) sdyn->contents;
5355 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
5356
5357 for (; dyncon < dynconend; dyncon++)
5358 {
5359 Elf_Internal_Dyn dyn;
5360 asection * s;
5361
5362 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
5363
5364 switch (dyn.d_tag)
5365 {
5366 default:
5367 break;
5368
5369 case DT_PLTGOT:
5370 s = htab->root.sgot;
5371 goto get_vma;
5372
5373 case DT_JMPREL:
5374 s = htab->root.srelplt;
5375 get_vma:
5376 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
5377 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5378 break;
5379
5380 case DT_PLTRELSZ:
5381 s = htab->root.srelplt;
5382 dyn.d_un.d_val = s->size;
5383 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5384 break;
5385 }
5386 }
5387
5388 /* Fill in the first entry in the procedure linkage table. */
5389 splt = htab->root.splt;
5390 if (splt && splt->size > 0)
5391 {
5392 if (bfd_link_pic (info))
5393 {
5394 memcpy (splt->contents, elf_mn10300_pic_plt_entry,
5395 elf_mn10300_sizeof_plt (info));
5396 }
5397 else
5398 {
5399 memcpy (splt->contents, elf_mn10300_plt0_entry, PLT0_ENTRY_SIZE);
5400 bfd_put_32 (output_bfd,
5401 sgot->output_section->vma + sgot->output_offset + 4,
5402 splt->contents + elf_mn10300_plt0_gotid_offset (info));
5403 bfd_put_32 (output_bfd,
5404 sgot->output_section->vma + sgot->output_offset + 8,
5405 splt->contents + elf_mn10300_plt0_linker_offset (info));
5406 }
5407
5408 /* UnixWare sets the entsize of .plt to 4, although that doesn't
5409 really seem like the right value. */
5410 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
5411
5412 /* UnixWare sets the entsize of .plt to 4, but this is incorrect
5413 as it means that the size of the PLT0 section (15 bytes) is not
5414 a multiple of the sh_entsize. Some ELF tools flag this as an
5415 error. We could pad PLT0 to 16 bytes, but that would introduce
5416 compatibilty issues with previous toolchains, so instead we
5417 just set the entry size to 1. */
5418 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 1;
5419 }
5420 }
5421
5422 /* Fill in the first three entries in the global offset table. */
5423 if (sgot->size > 0)
5424 {
5425 if (sdyn == NULL)
5426 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
5427 else
5428 bfd_put_32 (output_bfd,
5429 sdyn->output_section->vma + sdyn->output_offset,
5430 sgot->contents);
5431 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
5432 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
5433 }
5434
5435 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
5436
5437 return TRUE;
5438 }
5439
5440 /* Classify relocation types, such that combreloc can sort them
5441 properly. */
5442
5443 static enum elf_reloc_type_class
5444 _bfd_mn10300_elf_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
5445 const asection *rel_sec ATTRIBUTE_UNUSED,
5446 const Elf_Internal_Rela *rela)
5447 {
5448 switch ((int) ELF32_R_TYPE (rela->r_info))
5449 {
5450 case R_MN10300_RELATIVE: return reloc_class_relative;
5451 case R_MN10300_JMP_SLOT: return reloc_class_plt;
5452 case R_MN10300_COPY: return reloc_class_copy;
5453 default: return reloc_class_normal;
5454 }
5455 }
5456
5457 /* Allocate space for an MN10300 extension to the bfd elf data structure. */
5458
5459 static bfd_boolean
5460 mn10300_elf_mkobject (bfd *abfd)
5461 {
5462 return bfd_elf_allocate_object (abfd, sizeof (struct elf_mn10300_obj_tdata),
5463 MN10300_ELF_DATA);
5464 }
5465
5466 #define bfd_elf32_mkobject mn10300_elf_mkobject
5467
5468 #ifndef ELF_ARCH
5469 #define TARGET_LITTLE_SYM mn10300_elf32_vec
5470 #define TARGET_LITTLE_NAME "elf32-mn10300"
5471 #define ELF_ARCH bfd_arch_mn10300
5472 #define ELF_TARGET_ID MN10300_ELF_DATA
5473 #define ELF_MACHINE_CODE EM_MN10300
5474 #define ELF_MACHINE_ALT1 EM_CYGNUS_MN10300
5475 #define ELF_MAXPAGESIZE 0x1000
5476 #endif
5477
5478 #define elf_info_to_howto mn10300_info_to_howto
5479 #define elf_info_to_howto_rel NULL
5480 #define elf_backend_can_gc_sections 1
5481 #define elf_backend_rela_normal 1
5482 #define elf_backend_check_relocs mn10300_elf_check_relocs
5483 #define elf_backend_gc_mark_hook mn10300_elf_gc_mark_hook
5484 #define elf_backend_relocate_section mn10300_elf_relocate_section
5485 #define bfd_elf32_bfd_relax_section mn10300_elf_relax_section
5486 #define bfd_elf32_bfd_get_relocated_section_contents \
5487 mn10300_elf_get_relocated_section_contents
5488 #define bfd_elf32_bfd_link_hash_table_create \
5489 elf32_mn10300_link_hash_table_create
5490
5491 #ifndef elf_symbol_leading_char
5492 #define elf_symbol_leading_char '_'
5493 #endif
5494
5495 /* So we can set bits in e_flags. */
5496 #define elf_backend_final_write_processing \
5497 _bfd_mn10300_elf_final_write_processing
5498 #define elf_backend_object_p _bfd_mn10300_elf_object_p
5499
5500 #define bfd_elf32_bfd_merge_private_bfd_data \
5501 _bfd_mn10300_elf_merge_private_bfd_data
5502
5503 #define elf_backend_can_gc_sections 1
5504 #define elf_backend_create_dynamic_sections \
5505 _bfd_mn10300_elf_create_dynamic_sections
5506 #define elf_backend_adjust_dynamic_symbol \
5507 _bfd_mn10300_elf_adjust_dynamic_symbol
5508 #define elf_backend_size_dynamic_sections \
5509 _bfd_mn10300_elf_size_dynamic_sections
5510 #define elf_backend_omit_section_dynsym _bfd_elf_omit_section_dynsym_all
5511 #define elf_backend_finish_dynamic_symbol \
5512 _bfd_mn10300_elf_finish_dynamic_symbol
5513 #define elf_backend_finish_dynamic_sections \
5514 _bfd_mn10300_elf_finish_dynamic_sections
5515 #define elf_backend_copy_indirect_symbol \
5516 _bfd_mn10300_copy_indirect_symbol
5517 #define elf_backend_reloc_type_class \
5518 _bfd_mn10300_elf_reloc_type_class
5519
5520 #define elf_backend_want_got_plt 1
5521 #define elf_backend_plt_readonly 1
5522 #define elf_backend_want_plt_sym 0
5523 #define elf_backend_got_header_size 12
5524 #define elf_backend_dtrel_excludes_plt 1
5525
5526 #include "elf32-target.h"
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