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[deliverable/binutils-gdb.git] / bfd / elf-m10300.c
1 /* Matsushita 10300 specific support for 32-bit ELF
2 Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
3 Free Software Foundation, Inc.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
20
21 #include "bfd.h"
22 #include "sysdep.h"
23 #include "libbfd.h"
24 #include "elf-bfd.h"
25 #include "elf/mn10300.h"
26
27 static bfd_reloc_status_type mn10300_elf_final_link_relocate
28 PARAMS ((reloc_howto_type *, bfd *, bfd *, asection *, bfd_byte *,
29 bfd_vma, bfd_vma, bfd_vma,
30 struct elf_link_hash_entry *, unsigned long, struct bfd_link_info *,
31 asection *, int));
32 static bfd_boolean mn10300_elf_relocate_section
33 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
34 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
35 static bfd_boolean mn10300_elf_relax_section
36 PARAMS ((bfd *, asection *, struct bfd_link_info *, bfd_boolean *));
37 static bfd_byte * mn10300_elf_get_relocated_section_contents
38 PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_order *,
39 bfd_byte *, bfd_boolean, asymbol **));
40 static unsigned long elf_mn10300_mach
41 PARAMS ((flagword));
42 void _bfd_mn10300_elf_final_write_processing
43 PARAMS ((bfd *, bfd_boolean));
44 bfd_boolean _bfd_mn10300_elf_object_p
45 PARAMS ((bfd *));
46 bfd_boolean _bfd_mn10300_elf_merge_private_bfd_data
47 PARAMS ((bfd *,bfd *));
48
49 /* The mn10300 linker needs to keep track of the number of relocs that
50 it decides to copy in check_relocs for each symbol. This is so
51 that it can discard PC relative relocs if it doesn't need them when
52 linking with -Bsymbolic. We store the information in a field
53 extending the regular ELF linker hash table. */
54
55 /* This structure keeps track of the number of PC relative relocs we
56 have copied for a given symbol. */
57
58 struct elf_mn10300_pcrel_relocs_copied
59 {
60 /* Next section. */
61 struct elf_mn10300_pcrel_relocs_copied * next;
62 /* A section in dynobj. */
63 asection * section;
64 /* Number of relocs copied in this section. */
65 bfd_size_type count;
66 };
67
68 struct elf32_mn10300_link_hash_entry {
69 /* The basic elf link hash table entry. */
70 struct elf_link_hash_entry root;
71
72 /* For function symbols, the number of times this function is
73 called directly (ie by name). */
74 unsigned int direct_calls;
75
76 /* For function symbols, the size of this function's stack
77 (if <= 255 bytes). We stuff this into "call" instructions
78 to this target when it's valid and profitable to do so.
79
80 This does not include stack allocated by movm! */
81 unsigned char stack_size;
82
83 /* For function symbols, arguments (if any) for movm instruction
84 in the prologue. We stuff this value into "call" instructions
85 to the target when it's valid and profitable to do so. */
86 unsigned char movm_args;
87
88 /* For funtion symbols, the amount of stack space that would be allocated
89 by the movm instruction. This is redundant with movm_args, but we
90 add it to the hash table to avoid computing it over and over. */
91 unsigned char movm_stack_size;
92
93 /* Number of PC relative relocs copied for this symbol. */
94 struct elf_mn10300_pcrel_relocs_copied * pcrel_relocs_copied;
95
96 /* When set, convert all "call" instructions to this target into "calls"
97 instructions. */
98 #define MN10300_CONVERT_CALL_TO_CALLS 0x1
99
100 /* Used to mark functions which have had redundant parts of their
101 prologue deleted. */
102 #define MN10300_DELETED_PROLOGUE_BYTES 0x2
103 unsigned char flags;
104 };
105
106 /* We derive a hash table from the main elf linker hash table so
107 we can store state variables and a secondary hash table without
108 resorting to global variables. */
109 struct elf32_mn10300_link_hash_table {
110 /* The main hash table. */
111 struct elf_link_hash_table root;
112
113 /* A hash table for static functions. We could derive a new hash table
114 instead of using the full elf32_mn10300_link_hash_table if we wanted
115 to save some memory. */
116 struct elf32_mn10300_link_hash_table *static_hash_table;
117
118 /* Random linker state flags. */
119 #define MN10300_HASH_ENTRIES_INITIALIZED 0x1
120 char flags;
121 };
122
123 /* For MN10300 linker hash table. */
124
125 /* Get the MN10300 ELF linker hash table from a link_info structure. */
126
127 #define elf32_mn10300_hash_table(p) \
128 ((struct elf32_mn10300_link_hash_table *) ((p)->hash))
129
130 #define elf32_mn10300_link_hash_traverse(table, func, info) \
131 (elf_link_hash_traverse \
132 (&(table)->root, \
133 (bfd_boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
134 (info)))
135
136 static struct bfd_hash_entry *elf32_mn10300_link_hash_newfunc
137 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
138 static struct bfd_link_hash_table *elf32_mn10300_link_hash_table_create
139 PARAMS ((bfd *));
140 static void elf32_mn10300_link_hash_table_free
141 PARAMS ((struct bfd_link_hash_table *));
142
143 static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
144 PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
145 static void mn10300_info_to_howto
146 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
147 static bfd_boolean mn10300_elf_check_relocs
148 PARAMS ((bfd *, struct bfd_link_info *, asection *,
149 const Elf_Internal_Rela *));
150 static asection *mn10300_elf_gc_mark_hook
151 PARAMS ((asection *, struct bfd_link_info *info, Elf_Internal_Rela *,
152 struct elf_link_hash_entry *, Elf_Internal_Sym *));
153 static bfd_boolean mn10300_elf_relax_delete_bytes
154 PARAMS ((bfd *, asection *, bfd_vma, int));
155 static bfd_boolean mn10300_elf_symbol_address_p
156 PARAMS ((bfd *, asection *, Elf_Internal_Sym *, bfd_vma));
157 static bfd_boolean elf32_mn10300_finish_hash_table_entry
158 PARAMS ((struct bfd_hash_entry *, PTR));
159 static void compute_function_info
160 PARAMS ((bfd *, struct elf32_mn10300_link_hash_entry *,
161 bfd_vma, unsigned char *));
162
163 static bfd_boolean _bfd_mn10300_elf_create_got_section
164 PARAMS ((bfd *, struct bfd_link_info *));
165 static bfd_boolean _bfd_mn10300_elf_create_dynamic_sections
166 PARAMS ((bfd *, struct bfd_link_info *));
167 static bfd_boolean _bfd_mn10300_elf_adjust_dynamic_symbol
168 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
169 static bfd_boolean _bfd_mn10300_elf_discard_copies
170 PARAMS ((struct elf32_mn10300_link_hash_entry *,
171 struct bfd_link_info *));
172 static bfd_boolean _bfd_mn10300_elf_size_dynamic_sections
173 PARAMS ((bfd *, struct bfd_link_info *));
174 static bfd_boolean _bfd_mn10300_elf_finish_dynamic_symbol
175 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
176 Elf_Internal_Sym *));
177 static bfd_boolean _bfd_mn10300_elf_finish_dynamic_sections
178 PARAMS ((bfd *, struct bfd_link_info *));
179
180 static reloc_howto_type elf_mn10300_howto_table[] = {
181 /* Dummy relocation. Does nothing. */
182 HOWTO (R_MN10300_NONE,
183 0,
184 2,
185 16,
186 FALSE,
187 0,
188 complain_overflow_bitfield,
189 bfd_elf_generic_reloc,
190 "R_MN10300_NONE",
191 FALSE,
192 0,
193 0,
194 FALSE),
195 /* Standard 32 bit reloc. */
196 HOWTO (R_MN10300_32,
197 0,
198 2,
199 32,
200 FALSE,
201 0,
202 complain_overflow_bitfield,
203 bfd_elf_generic_reloc,
204 "R_MN10300_32",
205 FALSE,
206 0xffffffff,
207 0xffffffff,
208 FALSE),
209 /* Standard 16 bit reloc. */
210 HOWTO (R_MN10300_16,
211 0,
212 1,
213 16,
214 FALSE,
215 0,
216 complain_overflow_bitfield,
217 bfd_elf_generic_reloc,
218 "R_MN10300_16",
219 FALSE,
220 0xffff,
221 0xffff,
222 FALSE),
223 /* Standard 8 bit reloc. */
224 HOWTO (R_MN10300_8,
225 0,
226 0,
227 8,
228 FALSE,
229 0,
230 complain_overflow_bitfield,
231 bfd_elf_generic_reloc,
232 "R_MN10300_8",
233 FALSE,
234 0xff,
235 0xff,
236 FALSE),
237 /* Standard 32bit pc-relative reloc. */
238 HOWTO (R_MN10300_PCREL32,
239 0,
240 2,
241 32,
242 TRUE,
243 0,
244 complain_overflow_bitfield,
245 bfd_elf_generic_reloc,
246 "R_MN10300_PCREL32",
247 FALSE,
248 0xffffffff,
249 0xffffffff,
250 TRUE),
251 /* Standard 16bit pc-relative reloc. */
252 HOWTO (R_MN10300_PCREL16,
253 0,
254 1,
255 16,
256 TRUE,
257 0,
258 complain_overflow_bitfield,
259 bfd_elf_generic_reloc,
260 "R_MN10300_PCREL16",
261 FALSE,
262 0xffff,
263 0xffff,
264 TRUE),
265 /* Standard 8 pc-relative reloc. */
266 HOWTO (R_MN10300_PCREL8,
267 0,
268 0,
269 8,
270 TRUE,
271 0,
272 complain_overflow_bitfield,
273 bfd_elf_generic_reloc,
274 "R_MN10300_PCREL8",
275 FALSE,
276 0xff,
277 0xff,
278 TRUE),
279
280 /* GNU extension to record C++ vtable hierarchy */
281 HOWTO (R_MN10300_GNU_VTINHERIT, /* type */
282 0, /* rightshift */
283 0, /* size (0 = byte, 1 = short, 2 = long) */
284 0, /* bitsize */
285 FALSE, /* pc_relative */
286 0, /* bitpos */
287 complain_overflow_dont, /* complain_on_overflow */
288 NULL, /* special_function */
289 "R_MN10300_GNU_VTINHERIT", /* name */
290 FALSE, /* partial_inplace */
291 0, /* src_mask */
292 0, /* dst_mask */
293 FALSE), /* pcrel_offset */
294
295 /* GNU extension to record C++ vtable member usage */
296 HOWTO (R_MN10300_GNU_VTENTRY, /* type */
297 0, /* rightshift */
298 0, /* size (0 = byte, 1 = short, 2 = long) */
299 0, /* bitsize */
300 FALSE, /* pc_relative */
301 0, /* bitpos */
302 complain_overflow_dont, /* complain_on_overflow */
303 NULL, /* special_function */
304 "R_MN10300_GNU_VTENTRY", /* name */
305 FALSE, /* partial_inplace */
306 0, /* src_mask */
307 0, /* dst_mask */
308 FALSE), /* pcrel_offset */
309
310 /* Standard 24 bit reloc. */
311 HOWTO (R_MN10300_24,
312 0,
313 2,
314 24,
315 FALSE,
316 0,
317 complain_overflow_bitfield,
318 bfd_elf_generic_reloc,
319 "R_MN10300_24",
320 FALSE,
321 0xffffff,
322 0xffffff,
323 FALSE),
324 HOWTO (R_MN10300_GOTPC32, /* type */
325 0, /* rightshift */
326 2, /* size (0 = byte, 1 = short, 2 = long) */
327 32, /* bitsize */
328 TRUE, /* pc_relative */
329 0, /* bitpos */
330 complain_overflow_bitfield, /* complain_on_overflow */
331 bfd_elf_generic_reloc, /* */
332 "R_MN10300_GOTPC32", /* name */
333 FALSE, /* partial_inplace */
334 0xffffffff, /* src_mask */
335 0xffffffff, /* dst_mask */
336 TRUE), /* pcrel_offset */
337
338 HOWTO (R_MN10300_GOTPC16, /* type */
339 0, /* rightshift */
340 1, /* size (0 = byte, 1 = short, 2 = long) */
341 16, /* bitsize */
342 TRUE, /* pc_relative */
343 0, /* bitpos */
344 complain_overflow_bitfield, /* complain_on_overflow */
345 bfd_elf_generic_reloc, /* */
346 "R_MN10300_GOTPC16", /* name */
347 FALSE, /* partial_inplace */
348 0xffff, /* src_mask */
349 0xffff, /* dst_mask */
350 TRUE), /* pcrel_offset */
351
352 HOWTO (R_MN10300_GOTOFF32, /* type */
353 0, /* rightshift */
354 2, /* size (0 = byte, 1 = short, 2 = long) */
355 32, /* bitsize */
356 FALSE, /* pc_relative */
357 0, /* bitpos */
358 complain_overflow_bitfield, /* complain_on_overflow */
359 bfd_elf_generic_reloc, /* */
360 "R_MN10300_GOTOFF32", /* name */
361 FALSE, /* partial_inplace */
362 0xffffffff, /* src_mask */
363 0xffffffff, /* dst_mask */
364 FALSE), /* pcrel_offset */
365
366 HOWTO (R_MN10300_GOTOFF24, /* type */
367 0, /* rightshift */
368 2, /* size (0 = byte, 1 = short, 2 = long) */
369 24, /* bitsize */
370 FALSE, /* pc_relative */
371 0, /* bitpos */
372 complain_overflow_bitfield, /* complain_on_overflow */
373 bfd_elf_generic_reloc, /* */
374 "R_MN10300_GOTOFF24", /* name */
375 FALSE, /* partial_inplace */
376 0xffffff, /* src_mask */
377 0xffffff, /* dst_mask */
378 FALSE), /* pcrel_offset */
379
380 HOWTO (R_MN10300_GOTOFF16, /* type */
381 0, /* rightshift */
382 1, /* size (0 = byte, 1 = short, 2 = long) */
383 16, /* bitsize */
384 FALSE, /* pc_relative */
385 0, /* bitpos */
386 complain_overflow_bitfield, /* complain_on_overflow */
387 bfd_elf_generic_reloc, /* */
388 "R_MN10300_GOTOFF16", /* name */
389 FALSE, /* partial_inplace */
390 0xffff, /* src_mask */
391 0xffff, /* dst_mask */
392 FALSE), /* pcrel_offset */
393
394 HOWTO (R_MN10300_PLT32, /* type */
395 0, /* rightshift */
396 2, /* size (0 = byte, 1 = short, 2 = long) */
397 32, /* bitsize */
398 TRUE, /* pc_relative */
399 0, /* bitpos */
400 complain_overflow_bitfield, /* complain_on_overflow */
401 bfd_elf_generic_reloc, /* */
402 "R_MN10300_PLT32", /* name */
403 FALSE, /* partial_inplace */
404 0xffffffff, /* src_mask */
405 0xffffffff, /* dst_mask */
406 TRUE), /* pcrel_offset */
407
408 HOWTO (R_MN10300_PLT16, /* type */
409 0, /* rightshift */
410 1, /* size (0 = byte, 1 = short, 2 = long) */
411 16, /* bitsize */
412 TRUE, /* pc_relative */
413 0, /* bitpos */
414 complain_overflow_bitfield, /* complain_on_overflow */
415 bfd_elf_generic_reloc, /* */
416 "R_MN10300_PLT16", /* name */
417 FALSE, /* partial_inplace */
418 0xffff, /* src_mask */
419 0xffff, /* dst_mask */
420 TRUE), /* pcrel_offset */
421
422 HOWTO (R_MN10300_GOT32, /* type */
423 0, /* rightshift */
424 2, /* size (0 = byte, 1 = short, 2 = long) */
425 32, /* bitsize */
426 FALSE, /* pc_relative */
427 0, /* bitpos */
428 complain_overflow_bitfield, /* complain_on_overflow */
429 bfd_elf_generic_reloc, /* */
430 "R_MN10300_GOT32", /* name */
431 FALSE, /* partial_inplace */
432 0xffffffff, /* src_mask */
433 0xffffffff, /* dst_mask */
434 FALSE), /* pcrel_offset */
435
436 HOWTO (R_MN10300_GOT24, /* type */
437 0, /* rightshift */
438 2, /* size (0 = byte, 1 = short, 2 = long) */
439 24, /* bitsize */
440 FALSE, /* pc_relative */
441 0, /* bitpos */
442 complain_overflow_bitfield, /* complain_on_overflow */
443 bfd_elf_generic_reloc, /* */
444 "R_MN10300_GOT24", /* name */
445 FALSE, /* partial_inplace */
446 0xffffffff, /* src_mask */
447 0xffffffff, /* dst_mask */
448 FALSE), /* pcrel_offset */
449
450 HOWTO (R_MN10300_GOT16, /* type */
451 0, /* rightshift */
452 1, /* size (0 = byte, 1 = short, 2 = long) */
453 16, /* bitsize */
454 FALSE, /* pc_relative */
455 0, /* bitpos */
456 complain_overflow_bitfield, /* complain_on_overflow */
457 bfd_elf_generic_reloc, /* */
458 "R_MN10300_GOT16", /* name */
459 FALSE, /* partial_inplace */
460 0xffffffff, /* src_mask */
461 0xffffffff, /* dst_mask */
462 FALSE), /* pcrel_offset */
463
464 HOWTO (R_MN10300_COPY, /* type */
465 0, /* rightshift */
466 2, /* size (0 = byte, 1 = short, 2 = long) */
467 32, /* bitsize */
468 FALSE, /* pc_relative */
469 0, /* bitpos */
470 complain_overflow_bitfield, /* complain_on_overflow */
471 bfd_elf_generic_reloc, /* */
472 "R_MN10300_COPY", /* name */
473 FALSE, /* partial_inplace */
474 0xffffffff, /* src_mask */
475 0xffffffff, /* dst_mask */
476 FALSE), /* pcrel_offset */
477
478 HOWTO (R_MN10300_GLOB_DAT, /* type */
479 0, /* rightshift */
480 2, /* size (0 = byte, 1 = short, 2 = long) */
481 32, /* bitsize */
482 FALSE, /* pc_relative */
483 0, /* bitpos */
484 complain_overflow_bitfield, /* complain_on_overflow */
485 bfd_elf_generic_reloc, /* */
486 "R_MN10300_GLOB_DAT", /* name */
487 FALSE, /* partial_inplace */
488 0xffffffff, /* src_mask */
489 0xffffffff, /* dst_mask */
490 FALSE), /* pcrel_offset */
491
492 HOWTO (R_MN10300_JMP_SLOT, /* type */
493 0, /* rightshift */
494 2, /* size (0 = byte, 1 = short, 2 = long) */
495 32, /* bitsize */
496 FALSE, /* pc_relative */
497 0, /* bitpos */
498 complain_overflow_bitfield, /* complain_on_overflow */
499 bfd_elf_generic_reloc, /* */
500 "R_MN10300_JMP_SLOT", /* name */
501 FALSE, /* partial_inplace */
502 0xffffffff, /* src_mask */
503 0xffffffff, /* dst_mask */
504 FALSE), /* pcrel_offset */
505
506 HOWTO (R_MN10300_RELATIVE, /* type */
507 0, /* rightshift */
508 2, /* size (0 = byte, 1 = short, 2 = long) */
509 32, /* bitsize */
510 FALSE, /* pc_relative */
511 0, /* bitpos */
512 complain_overflow_bitfield, /* complain_on_overflow */
513 bfd_elf_generic_reloc, /* */
514 "R_MN10300_RELATIVE", /* name */
515 FALSE, /* partial_inplace */
516 0xffffffff, /* src_mask */
517 0xffffffff, /* dst_mask */
518 FALSE), /* pcrel_offset */
519
520 };
521
522 struct mn10300_reloc_map {
523 bfd_reloc_code_real_type bfd_reloc_val;
524 unsigned char elf_reloc_val;
525 };
526
527 static const struct mn10300_reloc_map mn10300_reloc_map[] = {
528 { BFD_RELOC_NONE, R_MN10300_NONE, },
529 { BFD_RELOC_32, R_MN10300_32, },
530 { BFD_RELOC_16, R_MN10300_16, },
531 { BFD_RELOC_8, R_MN10300_8, },
532 { BFD_RELOC_32_PCREL, R_MN10300_PCREL32, },
533 { BFD_RELOC_16_PCREL, R_MN10300_PCREL16, },
534 { BFD_RELOC_8_PCREL, R_MN10300_PCREL8, },
535 { BFD_RELOC_24, R_MN10300_24, },
536 { BFD_RELOC_VTABLE_INHERIT, R_MN10300_GNU_VTINHERIT },
537 { BFD_RELOC_VTABLE_ENTRY, R_MN10300_GNU_VTENTRY },
538 { BFD_RELOC_32_GOT_PCREL, R_MN10300_GOTPC32 },
539 { BFD_RELOC_16_GOT_PCREL, R_MN10300_GOTPC16 },
540 { BFD_RELOC_32_GOTOFF, R_MN10300_GOTOFF32 },
541 { BFD_RELOC_MN10300_GOTOFF24, R_MN10300_GOTOFF24 },
542 { BFD_RELOC_16_GOTOFF, R_MN10300_GOTOFF16 },
543 { BFD_RELOC_32_PLT_PCREL, R_MN10300_PLT32 },
544 { BFD_RELOC_16_PLT_PCREL, R_MN10300_PLT16 },
545 { BFD_RELOC_MN10300_GOT32, R_MN10300_GOT32 },
546 { BFD_RELOC_MN10300_GOT24, R_MN10300_GOT24 },
547 { BFD_RELOC_MN10300_GOT16, R_MN10300_GOT16 },
548 { BFD_RELOC_MN10300_COPY, R_MN10300_COPY },
549 { BFD_RELOC_MN10300_GLOB_DAT, R_MN10300_GLOB_DAT },
550 { BFD_RELOC_MN10300_JMP_SLOT, R_MN10300_JMP_SLOT },
551 { BFD_RELOC_MN10300_RELATIVE, R_MN10300_RELATIVE },
552 };
553
554 /* Create the GOT section. */
555
556 static bfd_boolean
557 _bfd_mn10300_elf_create_got_section (abfd, info)
558 bfd * abfd;
559 struct bfd_link_info * info;
560 {
561 flagword flags;
562 flagword pltflags;
563 asection * s;
564 struct bfd_link_hash_entry * bh;
565 struct elf_link_hash_entry * h;
566 const struct elf_backend_data * bed = get_elf_backend_data (abfd);
567 int ptralign;
568
569 /* This function may be called more than once. */
570 if (bfd_get_section_by_name (abfd, ".got") != NULL)
571 return TRUE;
572
573 switch (bed->s->arch_size)
574 {
575 case 32:
576 ptralign = 2;
577 break;
578
579 case 64:
580 ptralign = 3;
581 break;
582
583 default:
584 bfd_set_error (bfd_error_bad_value);
585 return FALSE;
586 }
587
588 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
589 | SEC_LINKER_CREATED);
590
591 pltflags = flags;
592 pltflags |= SEC_CODE;
593 if (bed->plt_not_loaded)
594 pltflags &= ~ (SEC_LOAD | SEC_HAS_CONTENTS);
595 if (bed->plt_readonly)
596 pltflags |= SEC_READONLY;
597
598 s = bfd_make_section (abfd, ".plt");
599 if (s == NULL
600 || ! bfd_set_section_flags (abfd, s, pltflags)
601 || ! bfd_set_section_alignment (abfd, s, bed->plt_alignment))
602 return FALSE;
603
604 if (bed->want_plt_sym)
605 {
606 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
607 .plt section. */
608 bh = NULL;
609 if (! (_bfd_generic_link_add_one_symbol
610 (info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s,
611 (bfd_vma) 0, (const char *) NULL, FALSE,
612 get_elf_backend_data (abfd)->collect, &bh)))
613 return FALSE;
614 h = (struct elf_link_hash_entry *) bh;
615 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
616 h->type = STT_OBJECT;
617
618 if (info->shared
619 && ! _bfd_elf_link_record_dynamic_symbol (info, h))
620 return FALSE;
621 }
622
623 s = bfd_make_section (abfd, ".got");
624 if (s == NULL
625 || ! bfd_set_section_flags (abfd, s, flags)
626 || ! bfd_set_section_alignment (abfd, s, ptralign))
627 return FALSE;
628
629 if (bed->want_got_plt)
630 {
631 s = bfd_make_section (abfd, ".got.plt");
632 if (s == NULL
633 || ! bfd_set_section_flags (abfd, s, flags)
634 || ! bfd_set_section_alignment (abfd, s, ptralign))
635 return FALSE;
636 }
637
638 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
639 (or .got.plt) section. We don't do this in the linker script
640 because we don't want to define the symbol if we are not creating
641 a global offset table. */
642 bh = NULL;
643 if (!(_bfd_generic_link_add_one_symbol
644 (info, abfd, "_GLOBAL_OFFSET_TABLE_", BSF_GLOBAL, s,
645 bed->got_symbol_offset, (const char *) NULL, FALSE,
646 bed->collect, &bh)))
647 return FALSE;
648 h = (struct elf_link_hash_entry *) bh;
649 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
650 h->type = STT_OBJECT;
651
652 if (info->shared
653 && ! _bfd_elf_link_record_dynamic_symbol (info, h))
654 return FALSE;
655
656 elf_hash_table (info)->hgot = h;
657
658 /* The first bit of the global offset table is the header. */
659 s->_raw_size += bed->got_header_size + bed->got_symbol_offset;
660
661 return TRUE;
662 }
663
664 static reloc_howto_type *
665 bfd_elf32_bfd_reloc_type_lookup (abfd, code)
666 bfd *abfd ATTRIBUTE_UNUSED;
667 bfd_reloc_code_real_type code;
668 {
669 unsigned int i;
670
671 for (i = 0;
672 i < sizeof (mn10300_reloc_map) / sizeof (struct mn10300_reloc_map);
673 i++)
674 {
675 if (mn10300_reloc_map[i].bfd_reloc_val == code)
676 return &elf_mn10300_howto_table[mn10300_reloc_map[i].elf_reloc_val];
677 }
678
679 return NULL;
680 }
681
682 /* Set the howto pointer for an MN10300 ELF reloc. */
683
684 static void
685 mn10300_info_to_howto (abfd, cache_ptr, dst)
686 bfd *abfd ATTRIBUTE_UNUSED;
687 arelent *cache_ptr;
688 Elf_Internal_Rela *dst;
689 {
690 unsigned int r_type;
691
692 r_type = ELF32_R_TYPE (dst->r_info);
693 BFD_ASSERT (r_type < (unsigned int) R_MN10300_MAX);
694 cache_ptr->howto = &elf_mn10300_howto_table[r_type];
695 }
696
697 /* Look through the relocs for a section during the first phase.
698 Since we don't do .gots or .plts, we just need to consider the
699 virtual table relocs for gc. */
700
701 static bfd_boolean
702 mn10300_elf_check_relocs (abfd, info, sec, relocs)
703 bfd *abfd;
704 struct bfd_link_info *info;
705 asection *sec;
706 const Elf_Internal_Rela *relocs;
707 {
708 Elf_Internal_Shdr *symtab_hdr;
709 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
710 const Elf_Internal_Rela *rel;
711 const Elf_Internal_Rela *rel_end;
712 bfd * dynobj;
713 bfd_vma * local_got_offsets;
714 asection * sgot;
715 asection * srelgot;
716 asection * sreloc;
717
718 sgot = NULL;
719 srelgot = NULL;
720 sreloc = NULL;
721
722 if (info->relocatable)
723 return TRUE;
724
725 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
726 sym_hashes = elf_sym_hashes (abfd);
727 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym);
728 if (!elf_bad_symtab (abfd))
729 sym_hashes_end -= symtab_hdr->sh_info;
730
731 dynobj = elf_hash_table (info)->dynobj;
732 local_got_offsets = elf_local_got_offsets (abfd);
733 rel_end = relocs + sec->reloc_count;
734 for (rel = relocs; rel < rel_end; rel++)
735 {
736 struct elf_link_hash_entry *h;
737 unsigned long r_symndx;
738
739 r_symndx = ELF32_R_SYM (rel->r_info);
740 if (r_symndx < symtab_hdr->sh_info)
741 h = NULL;
742 else
743 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
744
745 /* Some relocs require a global offset table. */
746 if (dynobj == NULL)
747 {
748 switch (ELF32_R_TYPE (rel->r_info))
749 {
750 case R_MN10300_GOT32:
751 case R_MN10300_GOT24:
752 case R_MN10300_GOT16:
753 case R_MN10300_GOTOFF32:
754 case R_MN10300_GOTOFF24:
755 case R_MN10300_GOTOFF16:
756 case R_MN10300_GOTPC32:
757 case R_MN10300_GOTPC16:
758 elf_hash_table (info)->dynobj = dynobj = abfd;
759 if (! _bfd_mn10300_elf_create_got_section (dynobj, info))
760 return FALSE;
761 break;
762
763 default:
764 break;
765 }
766 }
767
768 switch (ELF32_R_TYPE (rel->r_info))
769 {
770 /* This relocation describes the C++ object vtable hierarchy.
771 Reconstruct it for later use during GC. */
772 case R_MN10300_GNU_VTINHERIT:
773 if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
774 return FALSE;
775 break;
776
777 /* This relocation describes which C++ vtable entries are actually
778 used. Record for later use during GC. */
779 case R_MN10300_GNU_VTENTRY:
780 if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend))
781 return FALSE;
782 break;
783 case R_MN10300_GOT32:
784 case R_MN10300_GOT24:
785 case R_MN10300_GOT16:
786 /* This symbol requires a global offset table entry. */
787
788 if (sgot == NULL)
789 {
790 sgot = bfd_get_section_by_name (dynobj, ".got");
791 BFD_ASSERT (sgot != NULL);
792 }
793
794 if (srelgot == NULL
795 && (h != NULL || info->shared))
796 {
797 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
798 if (srelgot == NULL)
799 {
800 srelgot = bfd_make_section (dynobj, ".rela.got");
801 if (srelgot == NULL
802 || ! bfd_set_section_flags (dynobj, srelgot,
803 (SEC_ALLOC
804 | SEC_LOAD
805 | SEC_HAS_CONTENTS
806 | SEC_IN_MEMORY
807 | SEC_LINKER_CREATED
808 | SEC_READONLY))
809 || ! bfd_set_section_alignment (dynobj, srelgot, 2))
810 return FALSE;
811 }
812 }
813
814 if (h != NULL)
815 {
816 if (h->got.offset != (bfd_vma) -1)
817 /* We have already allocated space in the .got. */
818 break;
819
820 h->got.offset = sgot->_raw_size;
821
822 /* Make sure this symbol is output as a dynamic symbol. */
823 if (h->dynindx == -1)
824 {
825 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
826 return FALSE;
827 }
828
829 srelgot->_raw_size += sizeof (Elf32_External_Rela);
830 }
831 else
832 {
833 /* This is a global offset table entry for a local
834 symbol. */
835 if (local_got_offsets == NULL)
836 {
837 size_t size;
838 unsigned int i;
839
840 size = symtab_hdr->sh_info * sizeof (bfd_vma);
841 local_got_offsets = (bfd_vma *) bfd_alloc (abfd, size);
842
843 if (local_got_offsets == NULL)
844 return FALSE;
845 elf_local_got_offsets (abfd) = local_got_offsets;
846
847 for (i = 0; i < symtab_hdr->sh_info; i++)
848 local_got_offsets[i] = (bfd_vma) -1;
849 }
850
851 if (local_got_offsets[r_symndx] != (bfd_vma) -1)
852 /* We have already allocated space in the .got. */
853 break;
854
855 local_got_offsets[r_symndx] = sgot->_raw_size;
856
857 if (info->shared)
858 /* If we are generating a shared object, we need to
859 output a R_MN10300_RELATIVE reloc so that the dynamic
860 linker can adjust this GOT entry. */
861 srelgot->_raw_size += sizeof (Elf32_External_Rela);
862 }
863
864 sgot->_raw_size += 4;
865
866 break;
867
868 case R_MN10300_PLT32:
869 case R_MN10300_PLT16:
870 /* This symbol requires a procedure linkage table entry. We
871 actually build the entry in adjust_dynamic_symbol,
872 because this might be a case of linking PIC code which is
873 never referenced by a dynamic object, in which case we
874 don't need to generate a procedure linkage table entry
875 after all. */
876
877 /* If this is a local symbol, we resolve it directly without
878 creating a procedure linkage table entry. */
879 if (h == NULL)
880 continue;
881
882 if (ELF_ST_VISIBILITY (h->other) == STV_INTERNAL
883 || ELF_ST_VISIBILITY (h->other) == STV_HIDDEN)
884 break;
885
886 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
887
888 break;
889
890 case R_MN10300_32:
891 case R_MN10300_24:
892 case R_MN10300_16:
893 case R_MN10300_8:
894 case R_MN10300_PCREL32:
895 case R_MN10300_PCREL16:
896 case R_MN10300_PCREL8:
897 if (h != NULL)
898 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
899
900 /* If we are creating a shared library, and this is a reloc
901 against a global symbol, or a non PC relative reloc
902 against a local symbol, then we need to copy the reloc
903 into the shared library. However, if we are linking with
904 -Bsymbolic, we do not need to copy a reloc against a
905 global symbol which is defined in an object we are
906 including in the link (i.e., DEF_REGULAR is set). At
907 this point we have not seen all the input files, so it is
908 possible that DEF_REGULAR is not set now but will be set
909 later (it is never cleared). We account for that
910 possibility below by storing information in the
911 pcrel_relocs_copied field of the hash table entry. */
912 if (info->shared
913 && (sec->flags & SEC_ALLOC) != 0
914 && (! (elf_mn10300_howto_table[ELF32_R_TYPE (rel->r_info)]
915 .pc_relative)
916 || (h != NULL
917 && (! info->symbolic
918 || h->root.type == bfd_link_hash_defweak
919 || (h->elf_link_hash_flags
920 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
921 {
922 /* When creating a shared object, we must copy these
923 reloc types into the output file. We create a reloc
924 section in dynobj and make room for this reloc. */
925 if (sreloc == NULL)
926 {
927 const char * name;
928
929 name = (bfd_elf_string_from_elf_section
930 (abfd,
931 elf_elfheader (abfd)->e_shstrndx,
932 elf_section_data (sec)->rel_hdr.sh_name));
933 if (name == NULL)
934 return FALSE;
935
936 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
937 && strcmp (bfd_get_section_name (abfd, sec),
938 name + 5) == 0);
939
940 sreloc = bfd_get_section_by_name (dynobj, name);
941 if (sreloc == NULL)
942 {
943 flagword flags;
944
945 sreloc = bfd_make_section (dynobj, name);
946 flags = (SEC_HAS_CONTENTS | SEC_READONLY
947 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
948 if ((sec->flags & SEC_ALLOC) != 0)
949 flags |= SEC_ALLOC | SEC_LOAD;
950 if (sreloc == NULL
951 || ! bfd_set_section_flags (dynobj, sreloc, flags)
952 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
953 return FALSE;
954 }
955 }
956
957 sreloc->_raw_size += sizeof (Elf32_External_Rela);
958
959 /* If we are linking with -Bsymbolic, and this is a
960 global symbol, we count the number of PC relative
961 relocations we have entered for this symbol, so that
962 we can discard them again if the symbol is later
963 defined by a regular object. Note that this function
964 is only called if we are using an elf_sh linker
965 hash table, which means that h is really a pointer to
966 an elf32_mn10300_link_hash_entry. */
967 if (h != NULL
968 && (elf_mn10300_howto_table[ELF32_R_TYPE (rel->r_info)]
969 .pc_relative))
970 {
971 struct elf32_mn10300_link_hash_entry *eh;
972 struct elf_mn10300_pcrel_relocs_copied *p;
973
974 eh = (struct elf32_mn10300_link_hash_entry *) h;
975
976 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
977 if (p->section == sreloc)
978 break;
979
980 if (p == NULL)
981 {
982 p = ((struct elf_mn10300_pcrel_relocs_copied *)
983 bfd_alloc (dynobj, sizeof *p));
984 if (p == NULL)
985 return FALSE;
986
987 p->next = eh->pcrel_relocs_copied;
988 eh->pcrel_relocs_copied = p;
989 p->section = sreloc;
990 p->count = 0;
991 }
992
993 ++p->count;
994 }
995 }
996
997 break;
998 }
999 }
1000
1001 return TRUE;
1002 }
1003
1004 /* Return the section that should be marked against GC for a given
1005 relocation. */
1006
1007 static asection *
1008 mn10300_elf_gc_mark_hook (sec, info, rel, h, sym)
1009 asection *sec;
1010 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1011 Elf_Internal_Rela *rel;
1012 struct elf_link_hash_entry *h;
1013 Elf_Internal_Sym *sym;
1014 {
1015 if (h != NULL)
1016 {
1017 switch (ELF32_R_TYPE (rel->r_info))
1018 {
1019 case R_MN10300_GNU_VTINHERIT:
1020 case R_MN10300_GNU_VTENTRY:
1021 break;
1022
1023 default:
1024 switch (h->root.type)
1025 {
1026 case bfd_link_hash_defined:
1027 case bfd_link_hash_defweak:
1028 return h->root.u.def.section;
1029
1030 case bfd_link_hash_common:
1031 return h->root.u.c.p->section;
1032
1033 default:
1034 break;
1035 }
1036 }
1037 }
1038 else
1039 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
1040
1041 return NULL;
1042 }
1043
1044 /* Perform a relocation as part of a final link. */
1045 static bfd_reloc_status_type
1046 mn10300_elf_final_link_relocate (howto, input_bfd, output_bfd,
1047 input_section, contents, offset, value,
1048 addend, h, symndx, info, sym_sec, is_local)
1049 reloc_howto_type *howto;
1050 bfd *input_bfd;
1051 bfd *output_bfd ATTRIBUTE_UNUSED;
1052 asection *input_section;
1053 bfd_byte *contents;
1054 bfd_vma offset;
1055 bfd_vma value;
1056 bfd_vma addend;
1057 struct elf_link_hash_entry * h;
1058 unsigned long symndx;
1059 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1060 asection *sym_sec ATTRIBUTE_UNUSED;
1061 int is_local ATTRIBUTE_UNUSED;
1062 {
1063 unsigned long r_type = howto->type;
1064 bfd_byte *hit_data = contents + offset;
1065 bfd * dynobj;
1066 bfd_vma * local_got_offsets;
1067 asection * sgot;
1068 asection * splt;
1069 asection * sreloc;
1070
1071 dynobj = elf_hash_table (info)->dynobj;
1072 local_got_offsets = elf_local_got_offsets (input_bfd);
1073
1074 sgot = NULL;
1075 splt = NULL;
1076 sreloc = NULL;
1077
1078 switch (r_type)
1079 {
1080 case R_MN10300_NONE:
1081 return bfd_reloc_ok;
1082
1083 case R_MN10300_32:
1084 if (info->shared
1085 && (input_section->flags & SEC_ALLOC) != 0)
1086 {
1087 Elf_Internal_Rela outrel;
1088 bfd_boolean skip, relocate;
1089
1090 /* When generating a shared object, these relocations are
1091 copied into the output file to be resolved at run
1092 time. */
1093 if (sreloc == NULL)
1094 {
1095 const char * name;
1096
1097 name = (bfd_elf_string_from_elf_section
1098 (input_bfd,
1099 elf_elfheader (input_bfd)->e_shstrndx,
1100 elf_section_data (input_section)->rel_hdr.sh_name));
1101 if (name == NULL)
1102 return FALSE;
1103
1104 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
1105 && strcmp (bfd_get_section_name (input_bfd,
1106 input_section),
1107 name + 5) == 0);
1108
1109 sreloc = bfd_get_section_by_name (dynobj, name);
1110 BFD_ASSERT (sreloc != NULL);
1111 }
1112
1113 skip = FALSE;
1114
1115 if (elf_section_data (input_section)->sec_info == NULL
1116 || (input_section->sec_info_type != ELF_INFO_TYPE_STABS))
1117 outrel.r_offset = offset;
1118 else
1119 {
1120 bfd_vma off;
1121
1122 off = (_bfd_stab_section_offset
1123 (output_bfd, & elf_hash_table (info)->stab_info,
1124 input_section,
1125 & elf_section_data (input_section)->sec_info,
1126 offset));
1127 if (off == (bfd_vma) -1)
1128 skip = TRUE;
1129 outrel.r_offset = off;
1130 }
1131
1132 outrel.r_offset += (input_section->output_section->vma
1133 + input_section->output_offset);
1134
1135 if (skip)
1136 {
1137 memset (&outrel, 0, sizeof outrel);
1138 relocate = FALSE;
1139 }
1140 else
1141 {
1142 /* h->dynindx may be -1 if this symbol was marked to
1143 become local. */
1144 if (h == NULL
1145 || ((info->symbolic || h->dynindx == -1)
1146 && (h->elf_link_hash_flags
1147 & ELF_LINK_HASH_DEF_REGULAR) != 0))
1148 {
1149 relocate = TRUE;
1150 outrel.r_info = ELF32_R_INFO (0, R_MN10300_RELATIVE);
1151 outrel.r_addend = value + addend;
1152 }
1153 else
1154 {
1155 BFD_ASSERT (h->dynindx != -1);
1156 relocate = FALSE;
1157 outrel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_32);
1158 outrel.r_addend = value + addend;
1159 }
1160 }
1161
1162 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
1163 (bfd_byte *) (((Elf32_External_Rela *) sreloc->contents)
1164 + sreloc->reloc_count));
1165 ++sreloc->reloc_count;
1166
1167 /* If this reloc is against an external symbol, we do
1168 not want to fiddle with the addend. Otherwise, we
1169 need to include the symbol value so that it becomes
1170 an addend for the dynamic reloc. */
1171 if (! relocate)
1172 return bfd_reloc_ok;
1173 }
1174 value += addend;
1175 bfd_put_32 (input_bfd, value, hit_data);
1176 return bfd_reloc_ok;
1177
1178 case R_MN10300_24:
1179 value += addend;
1180
1181 if ((long) value > 0x7fffff || (long) value < -0x800000)
1182 return bfd_reloc_overflow;
1183
1184 bfd_put_8 (input_bfd, value & 0xff, hit_data);
1185 bfd_put_8 (input_bfd, (value >> 8) & 0xff, hit_data + 1);
1186 bfd_put_8 (input_bfd, (value >> 16) & 0xff, hit_data + 2);
1187 return bfd_reloc_ok;
1188
1189 case R_MN10300_16:
1190 value += addend;
1191
1192 if ((long) value > 0x7fff || (long) value < -0x8000)
1193 return bfd_reloc_overflow;
1194
1195 bfd_put_16 (input_bfd, value, hit_data);
1196 return bfd_reloc_ok;
1197
1198 case R_MN10300_8:
1199 value += addend;
1200
1201 if ((long) value > 0x7f || (long) value < -0x80)
1202 return bfd_reloc_overflow;
1203
1204 bfd_put_8 (input_bfd, value, hit_data);
1205 return bfd_reloc_ok;
1206
1207 case R_MN10300_PCREL8:
1208 value -= (input_section->output_section->vma
1209 + input_section->output_offset);
1210 value -= offset;
1211 value += addend;
1212
1213 if ((long) value > 0xff || (long) value < -0x100)
1214 return bfd_reloc_overflow;
1215
1216 bfd_put_8 (input_bfd, value, hit_data);
1217 return bfd_reloc_ok;
1218
1219 case R_MN10300_PCREL16:
1220 value -= (input_section->output_section->vma
1221 + input_section->output_offset);
1222 value -= offset;
1223 value += addend;
1224
1225 if ((long) value > 0xffff || (long) value < -0x10000)
1226 return bfd_reloc_overflow;
1227
1228 bfd_put_16 (input_bfd, value, hit_data);
1229 return bfd_reloc_ok;
1230
1231 case R_MN10300_PCREL32:
1232 if (info->shared
1233 && (input_section->flags & SEC_ALLOC) != 0
1234 && h != NULL
1235 && h->dynindx != -1
1236 && (! info->symbolic
1237 || (h->elf_link_hash_flags
1238 & ELF_LINK_HASH_DEF_REGULAR) == 0))
1239 {
1240 Elf_Internal_Rela outrel;
1241 bfd_boolean skip;
1242
1243 /* When generating a shared object, these relocations
1244 are copied into the output file to be resolved at run
1245 time. */
1246
1247 if (sreloc == NULL)
1248 {
1249 const char * name;
1250
1251 name = (bfd_elf_string_from_elf_section
1252 (input_bfd,
1253 elf_elfheader (input_bfd)->e_shstrndx,
1254 elf_section_data (input_section)->rel_hdr.sh_name));
1255 if (name == NULL)
1256 return FALSE;
1257
1258 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
1259 && strcmp (bfd_get_section_name (input_bfd,
1260 input_section),
1261 name + 5) == 0);
1262
1263 sreloc = bfd_get_section_by_name (dynobj, name);
1264 BFD_ASSERT (sreloc != NULL);
1265 }
1266
1267 skip = FALSE;
1268
1269 if (elf_section_data (input_section)->sec_info == NULL
1270 || (input_section->sec_info_type != ELF_INFO_TYPE_STABS))
1271 outrel.r_offset = offset;
1272 else
1273 {
1274 bfd_vma off;
1275
1276 off = (_bfd_stab_section_offset
1277 (output_bfd, & elf_hash_table (info)->stab_info,
1278 input_section,
1279 & elf_section_data (input_section)->sec_info,
1280 offset));
1281 if (off == (bfd_vma) -1)
1282 skip = TRUE;
1283 outrel.r_offset = off;
1284 }
1285
1286 outrel.r_offset += (input_section->output_section->vma
1287 + input_section->output_offset);
1288
1289 if (skip)
1290 memset (&outrel, 0, sizeof outrel);
1291 else
1292 {
1293 BFD_ASSERT (h != NULL && h->dynindx != -1);
1294 outrel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_PCREL32);
1295 outrel.r_addend = addend;
1296 }
1297
1298 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
1299 (bfd_byte *) (((Elf32_External_Rela *)
1300 sreloc->contents)
1301 + sreloc->reloc_count));
1302 ++sreloc->reloc_count;
1303
1304 return bfd_reloc_ok;
1305 }
1306
1307 value -= (input_section->output_section->vma
1308 + input_section->output_offset);
1309 value -= offset;
1310 value += addend;
1311
1312 bfd_put_32 (input_bfd, value, hit_data);
1313 return bfd_reloc_ok;
1314
1315 case R_MN10300_GNU_VTINHERIT:
1316 case R_MN10300_GNU_VTENTRY:
1317 return bfd_reloc_ok;
1318
1319 case R_MN10300_GOTPC32:
1320 /* Use global offset table as symbol value. */
1321
1322 value = bfd_get_section_by_name (dynobj,
1323 ".got")->output_section->vma;
1324 value -= (input_section->output_section->vma
1325 + input_section->output_offset);
1326 value -= offset;
1327 value += addend;
1328
1329 bfd_put_32 (input_bfd, value, hit_data);
1330 return bfd_reloc_ok;
1331
1332 case R_MN10300_GOTPC16:
1333 /* Use global offset table as symbol value. */
1334
1335 value = bfd_get_section_by_name (dynobj,
1336 ".got")->output_section->vma;
1337 value -= (input_section->output_section->vma
1338 + input_section->output_offset);
1339 value -= offset;
1340 value += addend;
1341
1342 if ((long) value > 0xffff || (long) value < -0x10000)
1343 return bfd_reloc_overflow;
1344
1345 bfd_put_16 (input_bfd, value, hit_data);
1346 return bfd_reloc_ok;
1347
1348 case R_MN10300_GOTOFF32:
1349 value -= bfd_get_section_by_name (dynobj,
1350 ".got")->output_section->vma;
1351 value += addend;
1352
1353 bfd_put_32 (input_bfd, value, hit_data);
1354 return bfd_reloc_ok;
1355
1356 case R_MN10300_GOTOFF24:
1357 value -= bfd_get_section_by_name (dynobj,
1358 ".got")->output_section->vma;
1359 value += addend;
1360
1361 if ((long) value > 0x7fffff || (long) value < -0x800000)
1362 return bfd_reloc_overflow;
1363
1364 bfd_put_8 (input_bfd, value, hit_data);
1365 bfd_put_8 (input_bfd, (value >> 8) & 0xff, hit_data + 1);
1366 bfd_put_8 (input_bfd, (value >> 16) & 0xff, hit_data + 2);
1367 return bfd_reloc_ok;
1368
1369 case R_MN10300_GOTOFF16:
1370 value -= bfd_get_section_by_name (dynobj,
1371 ".got")->output_section->vma;
1372 value += addend;
1373
1374 if ((long) value > 0xffff || (long) value < -0x10000)
1375 return bfd_reloc_overflow;
1376
1377 bfd_put_16 (input_bfd, value, hit_data);
1378 return bfd_reloc_ok;
1379
1380 case R_MN10300_PLT32:
1381 if (h != NULL
1382 && ELF_ST_VISIBILITY (h->other) != STV_INTERNAL
1383 && ELF_ST_VISIBILITY (h->other) != STV_HIDDEN
1384 && h->plt.offset != (bfd_vma) -1)
1385 {
1386 asection * splt;
1387
1388 splt = bfd_get_section_by_name (dynobj, ".plt");
1389
1390 value = (splt->output_section->vma
1391 + splt->output_offset
1392 + h->plt.offset) - value;
1393 }
1394
1395 value -= (input_section->output_section->vma
1396 + input_section->output_offset);
1397 value -= offset;
1398 value += addend;
1399
1400 bfd_put_32 (input_bfd, value, hit_data);
1401 return bfd_reloc_ok;
1402
1403 case R_MN10300_PLT16:
1404 if (h != NULL
1405 && ELF_ST_VISIBILITY (h->other) != STV_INTERNAL
1406 && ELF_ST_VISIBILITY (h->other) != STV_HIDDEN
1407 && h->plt.offset != (bfd_vma) -1)
1408 {
1409 asection * splt;
1410
1411 splt = bfd_get_section_by_name (dynobj, ".plt");
1412
1413 value = (splt->output_section->vma
1414 + splt->output_offset
1415 + h->plt.offset) - value;
1416 }
1417
1418 value -= (input_section->output_section->vma
1419 + input_section->output_offset);
1420 value -= offset;
1421 value += addend;
1422
1423 if ((long) value > 0xffff || (long) value < -0x10000)
1424 return bfd_reloc_overflow;
1425
1426 bfd_put_16 (input_bfd, value, hit_data);
1427 return bfd_reloc_ok;
1428
1429 case R_MN10300_GOT32:
1430 case R_MN10300_GOT24:
1431 case R_MN10300_GOT16:
1432 {
1433 asection * sgot;
1434
1435 sgot = bfd_get_section_by_name (dynobj, ".got");
1436
1437 if (h != NULL)
1438 {
1439 bfd_vma off;
1440
1441 off = h->got.offset;
1442 BFD_ASSERT (off != (bfd_vma) -1);
1443
1444 if (! elf_hash_table (info)->dynamic_sections_created
1445 || (info->shared
1446 && (info->symbolic || h->dynindx == -1)
1447 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
1448 /* This is actually a static link, or it is a
1449 -Bsymbolic link and the symbol is defined
1450 locally, or the symbol was forced to be local
1451 because of a version file. We must initialize
1452 this entry in the global offset table.
1453
1454 When doing a dynamic link, we create a .rela.got
1455 relocation entry to initialize the value. This
1456 is done in the finish_dynamic_symbol routine. */
1457 bfd_put_32 (output_bfd, value,
1458 sgot->contents + off);
1459
1460 value = sgot->output_offset + off;
1461 }
1462 else
1463 {
1464 bfd_vma off;
1465
1466 off = elf_local_got_offsets (input_bfd)[symndx];
1467
1468 bfd_put_32 (output_bfd, value, sgot->contents + off);
1469
1470 if (info->shared)
1471 {
1472 asection * srelgot;
1473 Elf_Internal_Rela outrel;
1474
1475 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1476 BFD_ASSERT (srelgot != NULL);
1477
1478 outrel.r_offset = (sgot->output_section->vma
1479 + sgot->output_offset
1480 + off);
1481 outrel.r_info = ELF32_R_INFO (0, R_MN10300_RELATIVE);
1482 outrel.r_addend = value;
1483 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
1484 (bfd_byte *) (((Elf32_External_Rela *)
1485 srelgot->contents)
1486 + srelgot->reloc_count));
1487 ++ srelgot->reloc_count;
1488 }
1489
1490 value = sgot->output_offset + off;
1491 }
1492 }
1493
1494 value += addend;
1495
1496 if (r_type == R_MN10300_GOT32)
1497 {
1498 bfd_put_32 (input_bfd, value, hit_data);
1499 return bfd_reloc_ok;
1500 }
1501 else if (r_type == R_MN10300_GOT24)
1502 {
1503 if ((long) value > 0x7fffff || (long) value < -0x800000)
1504 return bfd_reloc_overflow;
1505
1506 bfd_put_8 (input_bfd, value & 0xff, hit_data);
1507 bfd_put_8 (input_bfd, (value >> 8) & 0xff, hit_data + 1);
1508 bfd_put_8 (input_bfd, (value >> 16) & 0xff, hit_data + 2);
1509 return bfd_reloc_ok;
1510 }
1511 else if (r_type == R_MN10300_GOT16)
1512 {
1513 if ((long) value > 0xffff || (long) value < -0x10000)
1514 return bfd_reloc_overflow;
1515
1516 bfd_put_16 (input_bfd, value, hit_data);
1517 return bfd_reloc_ok;
1518 }
1519 /* Fall through. */
1520
1521 default:
1522 return bfd_reloc_notsupported;
1523 }
1524 }
1525 \f
1526 /* Relocate an MN10300 ELF section. */
1527 static bfd_boolean
1528 mn10300_elf_relocate_section (output_bfd, info, input_bfd, input_section,
1529 contents, relocs, local_syms, local_sections)
1530 bfd *output_bfd;
1531 struct bfd_link_info *info;
1532 bfd *input_bfd;
1533 asection *input_section;
1534 bfd_byte *contents;
1535 Elf_Internal_Rela *relocs;
1536 Elf_Internal_Sym *local_syms;
1537 asection **local_sections;
1538 {
1539 Elf_Internal_Shdr *symtab_hdr;
1540 struct elf32_mn10300_link_hash_entry **sym_hashes;
1541 Elf_Internal_Rela *rel, *relend;
1542
1543 if (info->relocatable)
1544 return TRUE;
1545
1546 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1547 sym_hashes = (struct elf32_mn10300_link_hash_entry **)
1548 (elf_sym_hashes (input_bfd));
1549
1550 rel = relocs;
1551 relend = relocs + input_section->reloc_count;
1552 for (; rel < relend; rel++)
1553 {
1554 int r_type;
1555 reloc_howto_type *howto;
1556 unsigned long r_symndx;
1557 Elf_Internal_Sym *sym;
1558 asection *sec;
1559 struct elf32_mn10300_link_hash_entry *h;
1560 bfd_vma relocation;
1561 bfd_reloc_status_type r;
1562
1563 r_symndx = ELF32_R_SYM (rel->r_info);
1564 r_type = ELF32_R_TYPE (rel->r_info);
1565 howto = elf_mn10300_howto_table + r_type;
1566
1567 /* Just skip the vtable gc relocs. */
1568 if (r_type == R_MN10300_GNU_VTINHERIT
1569 || r_type == R_MN10300_GNU_VTENTRY)
1570 continue;
1571
1572 h = NULL;
1573 sym = NULL;
1574 sec = NULL;
1575 if (r_symndx < symtab_hdr->sh_info)
1576 {
1577 sym = local_syms + r_symndx;
1578 sec = local_sections[r_symndx];
1579 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
1580 }
1581 else
1582 {
1583 bfd_boolean unresolved_reloc;
1584 bfd_boolean warned;
1585 struct elf_link_hash_entry *hh;
1586
1587 RELOC_FOR_GLOBAL_SYMBOL (hh, (struct elf_link_hash_entry *) sym_hashes,
1588 r_symndx, symtab_hdr, relocation,
1589 sec, unresolved_reloc, info,
1590 warned);
1591
1592 h = (struct elf32_mn10300_link_hash_entry *) hh;
1593
1594 if ((h->root.root.type == bfd_link_hash_defined
1595 || h->root.root.type == bfd_link_hash_defweak)
1596 && ( r_type == R_MN10300_GOTPC32
1597 || r_type == R_MN10300_GOTPC16
1598 || (( r_type == R_MN10300_PLT32
1599 || r_type == R_MN10300_PLT16)
1600 && ELF_ST_VISIBILITY (h->root.other) != STV_INTERNAL
1601 && ELF_ST_VISIBILITY (h->root.other) != STV_HIDDEN
1602 && h->root.plt.offset != (bfd_vma) -1)
1603 || (( r_type == R_MN10300_GOT32
1604 || r_type == R_MN10300_GOT24
1605 || r_type == R_MN10300_GOT16)
1606 && elf_hash_table (info)->dynamic_sections_created
1607 && (! info->shared
1608 || (! info->symbolic && h->root.dynindx != -1)
1609 || (h->root.elf_link_hash_flags
1610 & ELF_LINK_HASH_DEF_REGULAR) == 0))
1611 || (info->shared
1612 && ((! info->symbolic && h->root.dynindx != -1)
1613 || (h->root.elf_link_hash_flags
1614 & ELF_LINK_HASH_DEF_REGULAR) == 0)
1615 && ( r_type == R_MN10300_32
1616 || r_type == R_MN10300_PCREL32)
1617 && ((input_section->flags & SEC_ALLOC) != 0
1618 /* DWARF will emit R_MN10300_32 relocations
1619 in its sections against symbols defined
1620 externally in shared libraries. We can't
1621 do anything with them here. */
1622 || ((input_section->flags & SEC_DEBUGGING) != 0
1623 && (h->root.elf_link_hash_flags
1624 & ELF_LINK_HASH_DEF_DYNAMIC) != 0)))))
1625 /* In these cases, we don't need the relocation
1626 value. We check specially because in some
1627 obscure cases sec->output_section will be NULL. */
1628 relocation = 0;
1629
1630 else if (unresolved_reloc)
1631 (*_bfd_error_handler)
1632 (_("%s: warning: unresolvable relocation against symbol `%s' from %s section"),
1633 bfd_get_filename (input_bfd), h->root.root.root.string,
1634 bfd_get_section_name (input_bfd, input_section));
1635 }
1636
1637 r = mn10300_elf_final_link_relocate (howto, input_bfd, output_bfd,
1638 input_section,
1639 contents, rel->r_offset,
1640 relocation, rel->r_addend,
1641 (struct elf_link_hash_entry *)h,
1642 r_symndx,
1643 info, sec, h == NULL);
1644
1645 if (r != bfd_reloc_ok)
1646 {
1647 const char *name;
1648 const char *msg = (const char *) 0;
1649
1650 if (h != NULL)
1651 name = h->root.root.root.string;
1652 else
1653 {
1654 name = (bfd_elf_string_from_elf_section
1655 (input_bfd, symtab_hdr->sh_link, sym->st_name));
1656 if (name == NULL || *name == '\0')
1657 name = bfd_section_name (input_bfd, sec);
1658 }
1659
1660 switch (r)
1661 {
1662 case bfd_reloc_overflow:
1663 if (! ((*info->callbacks->reloc_overflow)
1664 (info, name, howto->name, (bfd_vma) 0,
1665 input_bfd, input_section, rel->r_offset)))
1666 return FALSE;
1667 break;
1668
1669 case bfd_reloc_undefined:
1670 if (! ((*info->callbacks->undefined_symbol)
1671 (info, name, input_bfd, input_section,
1672 rel->r_offset, TRUE)))
1673 return FALSE;
1674 break;
1675
1676 case bfd_reloc_outofrange:
1677 msg = _("internal error: out of range error");
1678 goto common_error;
1679
1680 case bfd_reloc_notsupported:
1681 msg = _("internal error: unsupported relocation error");
1682 goto common_error;
1683
1684 case bfd_reloc_dangerous:
1685 msg = _("internal error: dangerous error");
1686 goto common_error;
1687
1688 default:
1689 msg = _("internal error: unknown error");
1690 /* fall through */
1691
1692 common_error:
1693 if (!((*info->callbacks->warning)
1694 (info, msg, name, input_bfd, input_section,
1695 rel->r_offset)))
1696 return FALSE;
1697 break;
1698 }
1699 }
1700 }
1701
1702 return TRUE;
1703 }
1704
1705 /* Finish initializing one hash table entry. */
1706 static bfd_boolean
1707 elf32_mn10300_finish_hash_table_entry (gen_entry, in_args)
1708 struct bfd_hash_entry *gen_entry;
1709 PTR in_args ATTRIBUTE_UNUSED;
1710 {
1711 struct elf32_mn10300_link_hash_entry *entry;
1712 unsigned int byte_count = 0;
1713
1714 entry = (struct elf32_mn10300_link_hash_entry *) gen_entry;
1715
1716 if (entry->root.root.type == bfd_link_hash_warning)
1717 entry = (struct elf32_mn10300_link_hash_entry *) entry->root.root.u.i.link;
1718
1719 /* If we already know we want to convert "call" to "calls" for calls
1720 to this symbol, then return now. */
1721 if (entry->flags == MN10300_CONVERT_CALL_TO_CALLS)
1722 return TRUE;
1723
1724 /* If there are no named calls to this symbol, or there's nothing we
1725 can move from the function itself into the "call" instruction, then
1726 note that all "call" instructions should be converted into "calls"
1727 instructions and return. */
1728 if (entry->direct_calls == 0
1729 || (entry->stack_size == 0 && entry->movm_args == 0))
1730 {
1731 /* Make a note that we should convert "call" instructions to "calls"
1732 instructions for calls to this symbol. */
1733 entry->flags |= MN10300_CONVERT_CALL_TO_CALLS;
1734 return TRUE;
1735 }
1736
1737 /* We may be able to move some instructions from the function itself into
1738 the "call" instruction. Count how many bytes we might be able to
1739 eliminate in the function itself. */
1740
1741 /* A movm instruction is two bytes. */
1742 if (entry->movm_args)
1743 byte_count += 2;
1744
1745 /* Count the insn to allocate stack space too. */
1746 if (entry->stack_size > 0 && entry->stack_size <= 128)
1747 byte_count += 3;
1748 else if (entry->stack_size > 0 && entry->stack_size < 256)
1749 byte_count += 4;
1750
1751 /* If using "call" will result in larger code, then turn all
1752 the associated "call" instructions into "calls" instrutions. */
1753 if (byte_count < entry->direct_calls)
1754 entry->flags |= MN10300_CONVERT_CALL_TO_CALLS;
1755
1756 /* This routine never fails. */
1757 return TRUE;
1758 }
1759
1760 /* This function handles relaxing for the mn10300.
1761
1762 There's quite a few relaxing opportunites available on the mn10300:
1763
1764 * calls:32 -> calls:16 2 bytes
1765 * call:32 -> call:16 2 bytes
1766
1767 * call:32 -> calls:32 1 byte
1768 * call:16 -> calls:16 1 byte
1769 * These are done anytime using "calls" would result
1770 in smaller code, or when necessary to preserve the
1771 meaning of the program.
1772
1773 * call:32 varies
1774 * call:16
1775 * In some circumstances we can move instructions
1776 from a function prologue into a "call" instruction.
1777 This is only done if the resulting code is no larger
1778 than the original code.
1779
1780 * jmp:32 -> jmp:16 2 bytes
1781 * jmp:16 -> bra:8 1 byte
1782
1783 * If the previous instruction is a conditional branch
1784 around the jump/bra, we may be able to reverse its condition
1785 and change its target to the jump's target. The jump/bra
1786 can then be deleted. 2 bytes
1787
1788 * mov abs32 -> mov abs16 1 or 2 bytes
1789
1790 * Most instructions which accept imm32 can relax to imm16 1 or 2 bytes
1791 - Most instructions which accept imm16 can relax to imm8 1 or 2 bytes
1792
1793 * Most instructions which accept d32 can relax to d16 1 or 2 bytes
1794 - Most instructions which accept d16 can relax to d8 1 or 2 bytes
1795
1796 We don't handle imm16->imm8 or d16->d8 as they're very rare
1797 and somewhat more difficult to support. */
1798
1799 static bfd_boolean
1800 mn10300_elf_relax_section (abfd, sec, link_info, again)
1801 bfd *abfd;
1802 asection *sec;
1803 struct bfd_link_info *link_info;
1804 bfd_boolean *again;
1805 {
1806 Elf_Internal_Shdr *symtab_hdr;
1807 Elf_Internal_Rela *internal_relocs = NULL;
1808 Elf_Internal_Rela *irel, *irelend;
1809 bfd_byte *contents = NULL;
1810 Elf_Internal_Sym *isymbuf = NULL;
1811 struct elf32_mn10300_link_hash_table *hash_table;
1812 asection *section = sec;
1813
1814 /* Assume nothing changes. */
1815 *again = FALSE;
1816
1817 /* We need a pointer to the mn10300 specific hash table. */
1818 hash_table = elf32_mn10300_hash_table (link_info);
1819
1820 /* Initialize fields in each hash table entry the first time through. */
1821 if ((hash_table->flags & MN10300_HASH_ENTRIES_INITIALIZED) == 0)
1822 {
1823 bfd *input_bfd;
1824
1825 /* Iterate over all the input bfds. */
1826 for (input_bfd = link_info->input_bfds;
1827 input_bfd != NULL;
1828 input_bfd = input_bfd->link_next)
1829 {
1830 /* We're going to need all the symbols for each bfd. */
1831 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1832 if (symtab_hdr->sh_info != 0)
1833 {
1834 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1835 if (isymbuf == NULL)
1836 isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
1837 symtab_hdr->sh_info, 0,
1838 NULL, NULL, NULL);
1839 if (isymbuf == NULL)
1840 goto error_return;
1841 }
1842
1843 /* Iterate over each section in this bfd. */
1844 for (section = input_bfd->sections;
1845 section != NULL;
1846 section = section->next)
1847 {
1848 struct elf32_mn10300_link_hash_entry *hash;
1849 Elf_Internal_Sym *sym;
1850 asection *sym_sec = NULL;
1851 const char *sym_name;
1852 char *new_name;
1853
1854 /* If there's nothing to do in this section, skip it. */
1855 if (! (((section->flags & SEC_RELOC) != 0
1856 && section->reloc_count != 0)
1857 || (section->flags & SEC_CODE) != 0))
1858 continue;
1859
1860 /* Get cached copy of section contents if it exists. */
1861 if (elf_section_data (section)->this_hdr.contents != NULL)
1862 contents = elf_section_data (section)->this_hdr.contents;
1863 else if (section->_raw_size != 0)
1864 {
1865 /* Go get them off disk. */
1866 contents = (bfd_byte *) bfd_malloc (section->_raw_size);
1867 if (contents == NULL)
1868 goto error_return;
1869
1870 if (!bfd_get_section_contents (input_bfd, section,
1871 contents, (file_ptr) 0,
1872 section->_raw_size))
1873 goto error_return;
1874 }
1875 else
1876 contents = NULL;
1877
1878 /* If there aren't any relocs, then there's nothing to do. */
1879 if ((section->flags & SEC_RELOC) != 0
1880 && section->reloc_count != 0)
1881 {
1882
1883 /* Get a copy of the native relocations. */
1884 internal_relocs = (_bfd_elf_link_read_relocs
1885 (input_bfd, section, (PTR) NULL,
1886 (Elf_Internal_Rela *) NULL,
1887 link_info->keep_memory));
1888 if (internal_relocs == NULL)
1889 goto error_return;
1890
1891 /* Now examine each relocation. */
1892 irel = internal_relocs;
1893 irelend = irel + section->reloc_count;
1894 for (; irel < irelend; irel++)
1895 {
1896 long r_type;
1897 unsigned long r_index;
1898 unsigned char code;
1899
1900 r_type = ELF32_R_TYPE (irel->r_info);
1901 r_index = ELF32_R_SYM (irel->r_info);
1902
1903 if (r_type < 0 || r_type >= (int) R_MN10300_MAX)
1904 goto error_return;
1905
1906 /* We need the name and hash table entry of the target
1907 symbol! */
1908 hash = NULL;
1909 sym = NULL;
1910 sym_sec = NULL;
1911
1912 if (r_index < symtab_hdr->sh_info)
1913 {
1914 /* A local symbol. */
1915 Elf_Internal_Sym *isym;
1916 struct elf_link_hash_table *elftab;
1917 bfd_size_type amt;
1918
1919 isym = isymbuf + r_index;
1920 if (isym->st_shndx == SHN_UNDEF)
1921 sym_sec = bfd_und_section_ptr;
1922 else if (isym->st_shndx == SHN_ABS)
1923 sym_sec = bfd_abs_section_ptr;
1924 else if (isym->st_shndx == SHN_COMMON)
1925 sym_sec = bfd_com_section_ptr;
1926 else
1927 sym_sec
1928 = bfd_section_from_elf_index (input_bfd,
1929 isym->st_shndx);
1930
1931 sym_name
1932 = bfd_elf_string_from_elf_section (input_bfd,
1933 (symtab_hdr
1934 ->sh_link),
1935 isym->st_name);
1936
1937 /* If it isn't a function, then we don't care
1938 about it. */
1939 if (ELF_ST_TYPE (isym->st_info) != STT_FUNC)
1940 continue;
1941
1942 /* Tack on an ID so we can uniquely identify this
1943 local symbol in the global hash table. */
1944 amt = strlen (sym_name) + 10;
1945 new_name = bfd_malloc (amt);
1946 if (new_name == 0)
1947 goto error_return;
1948
1949 sprintf (new_name, "%s_%08x",
1950 sym_name, (int) sym_sec);
1951 sym_name = new_name;
1952
1953 elftab = &hash_table->static_hash_table->root;
1954 hash = ((struct elf32_mn10300_link_hash_entry *)
1955 elf_link_hash_lookup (elftab, sym_name,
1956 TRUE, TRUE, FALSE));
1957 free (new_name);
1958 }
1959 else
1960 {
1961 r_index -= symtab_hdr->sh_info;
1962 hash = (struct elf32_mn10300_link_hash_entry *)
1963 elf_sym_hashes (input_bfd)[r_index];
1964 }
1965
1966 /* If this is not a "call" instruction, then we
1967 should convert "call" instructions to "calls"
1968 instructions. */
1969 code = bfd_get_8 (input_bfd,
1970 contents + irel->r_offset - 1);
1971 if (code != 0xdd && code != 0xcd)
1972 hash->flags |= MN10300_CONVERT_CALL_TO_CALLS;
1973
1974 /* If this is a jump/call, then bump the
1975 direct_calls counter. Else force "call" to
1976 "calls" conversions. */
1977 if (r_type == R_MN10300_PCREL32
1978 || r_type == R_MN10300_PLT32
1979 || r_type == R_MN10300_PLT16
1980 || r_type == R_MN10300_PCREL16)
1981 hash->direct_calls++;
1982 else
1983 hash->flags |= MN10300_CONVERT_CALL_TO_CALLS;
1984 }
1985 }
1986
1987 /* Now look at the actual contents to get the stack size,
1988 and a list of what registers were saved in the prologue
1989 (ie movm_args). */
1990 if ((section->flags & SEC_CODE) != 0)
1991 {
1992 Elf_Internal_Sym *isym, *isymend;
1993 unsigned int sec_shndx;
1994 struct elf_link_hash_entry **hashes;
1995 struct elf_link_hash_entry **end_hashes;
1996 unsigned int symcount;
1997
1998 sec_shndx = _bfd_elf_section_from_bfd_section (input_bfd,
1999 section);
2000
2001 /* Look at each function defined in this section and
2002 update info for that function. */
2003 isymend = isymbuf + symtab_hdr->sh_info;
2004 for (isym = isymbuf; isym < isymend; isym++)
2005 {
2006 if (isym->st_shndx == sec_shndx
2007 && ELF_ST_TYPE (isym->st_info) == STT_FUNC)
2008 {
2009 struct elf_link_hash_table *elftab;
2010 bfd_size_type amt;
2011
2012 if (isym->st_shndx == SHN_UNDEF)
2013 sym_sec = bfd_und_section_ptr;
2014 else if (isym->st_shndx == SHN_ABS)
2015 sym_sec = bfd_abs_section_ptr;
2016 else if (isym->st_shndx == SHN_COMMON)
2017 sym_sec = bfd_com_section_ptr;
2018 else
2019 sym_sec
2020 = bfd_section_from_elf_index (input_bfd,
2021 isym->st_shndx);
2022
2023 sym_name = (bfd_elf_string_from_elf_section
2024 (input_bfd, symtab_hdr->sh_link,
2025 isym->st_name));
2026
2027 /* Tack on an ID so we can uniquely identify this
2028 local symbol in the global hash table. */
2029 amt = strlen (sym_name) + 10;
2030 new_name = bfd_malloc (amt);
2031 if (new_name == 0)
2032 goto error_return;
2033
2034 sprintf (new_name, "%s_%08x",
2035 sym_name, (int) sym_sec);
2036 sym_name = new_name;
2037
2038 elftab = &hash_table->static_hash_table->root;
2039 hash = ((struct elf32_mn10300_link_hash_entry *)
2040 elf_link_hash_lookup (elftab, sym_name,
2041 TRUE, TRUE, FALSE));
2042 free (new_name);
2043 compute_function_info (input_bfd, hash,
2044 isym->st_value, contents);
2045 }
2046 }
2047
2048 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
2049 - symtab_hdr->sh_info);
2050 hashes = elf_sym_hashes (input_bfd);
2051 end_hashes = hashes + symcount;
2052 for (; hashes < end_hashes; hashes++)
2053 {
2054 hash = (struct elf32_mn10300_link_hash_entry *) *hashes;
2055 if ((hash->root.root.type == bfd_link_hash_defined
2056 || hash->root.root.type == bfd_link_hash_defweak)
2057 && hash->root.root.u.def.section == section
2058 && ELF_ST_TYPE (isym->st_info) == STT_FUNC)
2059 compute_function_info (input_bfd, hash,
2060 (hash)->root.root.u.def.value,
2061 contents);
2062 }
2063 }
2064
2065 /* Cache or free any memory we allocated for the relocs. */
2066 if (internal_relocs != NULL
2067 && elf_section_data (section)->relocs != internal_relocs)
2068 free (internal_relocs);
2069 internal_relocs = NULL;
2070
2071 /* Cache or free any memory we allocated for the contents. */
2072 if (contents != NULL
2073 && elf_section_data (section)->this_hdr.contents != contents)
2074 {
2075 if (! link_info->keep_memory)
2076 free (contents);
2077 else
2078 {
2079 /* Cache the section contents for elf_link_input_bfd. */
2080 elf_section_data (section)->this_hdr.contents = contents;
2081 }
2082 }
2083 contents = NULL;
2084 }
2085
2086 /* Cache or free any memory we allocated for the symbols. */
2087 if (isymbuf != NULL
2088 && symtab_hdr->contents != (unsigned char *) isymbuf)
2089 {
2090 if (! link_info->keep_memory)
2091 free (isymbuf);
2092 else
2093 {
2094 /* Cache the symbols for elf_link_input_bfd. */
2095 symtab_hdr->contents = (unsigned char *) isymbuf;
2096 }
2097 }
2098 isymbuf = NULL;
2099 }
2100
2101 /* Now iterate on each symbol in the hash table and perform
2102 the final initialization steps on each. */
2103 elf32_mn10300_link_hash_traverse (hash_table,
2104 elf32_mn10300_finish_hash_table_entry,
2105 NULL);
2106 elf32_mn10300_link_hash_traverse (hash_table->static_hash_table,
2107 elf32_mn10300_finish_hash_table_entry,
2108 NULL);
2109
2110 /* All entries in the hash table are fully initialized. */
2111 hash_table->flags |= MN10300_HASH_ENTRIES_INITIALIZED;
2112
2113 /* Now that everything has been initialized, go through each
2114 code section and delete any prologue insns which will be
2115 redundant because their operations will be performed by
2116 a "call" instruction. */
2117 for (input_bfd = link_info->input_bfds;
2118 input_bfd != NULL;
2119 input_bfd = input_bfd->link_next)
2120 {
2121 /* We're going to need all the local symbols for each bfd. */
2122 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2123 if (symtab_hdr->sh_info != 0)
2124 {
2125 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
2126 if (isymbuf == NULL)
2127 isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
2128 symtab_hdr->sh_info, 0,
2129 NULL, NULL, NULL);
2130 if (isymbuf == NULL)
2131 goto error_return;
2132 }
2133
2134 /* Walk over each section in this bfd. */
2135 for (section = input_bfd->sections;
2136 section != NULL;
2137 section = section->next)
2138 {
2139 unsigned int sec_shndx;
2140 Elf_Internal_Sym *isym, *isymend;
2141 struct elf_link_hash_entry **hashes;
2142 struct elf_link_hash_entry **end_hashes;
2143 unsigned int symcount;
2144
2145 /* Skip non-code sections and empty sections. */
2146 if ((section->flags & SEC_CODE) == 0 || section->_raw_size == 0)
2147 continue;
2148
2149 if (section->reloc_count != 0)
2150 {
2151 /* Get a copy of the native relocations. */
2152 internal_relocs = (_bfd_elf_link_read_relocs
2153 (input_bfd, section, (PTR) NULL,
2154 (Elf_Internal_Rela *) NULL,
2155 link_info->keep_memory));
2156 if (internal_relocs == NULL)
2157 goto error_return;
2158 }
2159
2160 /* Get cached copy of section contents if it exists. */
2161 if (elf_section_data (section)->this_hdr.contents != NULL)
2162 contents = elf_section_data (section)->this_hdr.contents;
2163 else
2164 {
2165 /* Go get them off disk. */
2166 contents = (bfd_byte *) bfd_malloc (section->_raw_size);
2167 if (contents == NULL)
2168 goto error_return;
2169
2170 if (!bfd_get_section_contents (input_bfd, section,
2171 contents, (file_ptr) 0,
2172 section->_raw_size))
2173 goto error_return;
2174 }
2175
2176 sec_shndx = _bfd_elf_section_from_bfd_section (input_bfd,
2177 section);
2178
2179 /* Now look for any function in this section which needs
2180 insns deleted from its prologue. */
2181 isymend = isymbuf + symtab_hdr->sh_info;
2182 for (isym = isymbuf; isym < isymend; isym++)
2183 {
2184 struct elf32_mn10300_link_hash_entry *sym_hash;
2185 asection *sym_sec = NULL;
2186 const char *sym_name;
2187 char *new_name;
2188 struct elf_link_hash_table *elftab;
2189 bfd_size_type amt;
2190
2191 if (isym->st_shndx != sec_shndx)
2192 continue;
2193
2194 if (isym->st_shndx == SHN_UNDEF)
2195 sym_sec = bfd_und_section_ptr;
2196 else if (isym->st_shndx == SHN_ABS)
2197 sym_sec = bfd_abs_section_ptr;
2198 else if (isym->st_shndx == SHN_COMMON)
2199 sym_sec = bfd_com_section_ptr;
2200 else
2201 sym_sec
2202 = bfd_section_from_elf_index (input_bfd, isym->st_shndx);
2203
2204 sym_name
2205 = bfd_elf_string_from_elf_section (input_bfd,
2206 symtab_hdr->sh_link,
2207 isym->st_name);
2208
2209 /* Tack on an ID so we can uniquely identify this
2210 local symbol in the global hash table. */
2211 amt = strlen (sym_name) + 10;
2212 new_name = bfd_malloc (amt);
2213 if (new_name == 0)
2214 goto error_return;
2215 sprintf (new_name, "%s_%08x", sym_name, (int) sym_sec);
2216 sym_name = new_name;
2217
2218 elftab = &hash_table->static_hash_table->root;
2219 sym_hash = ((struct elf32_mn10300_link_hash_entry *)
2220 elf_link_hash_lookup (elftab, sym_name,
2221 FALSE, FALSE, FALSE));
2222
2223 free (new_name);
2224 if (sym_hash == NULL)
2225 continue;
2226
2227 if (! (sym_hash->flags & MN10300_CONVERT_CALL_TO_CALLS)
2228 && ! (sym_hash->flags & MN10300_DELETED_PROLOGUE_BYTES))
2229 {
2230 int bytes = 0;
2231
2232 /* Note that we've changed things. */
2233 elf_section_data (section)->relocs = internal_relocs;
2234 elf_section_data (section)->this_hdr.contents = contents;
2235 symtab_hdr->contents = (unsigned char *) isymbuf;
2236
2237 /* Count how many bytes we're going to delete. */
2238 if (sym_hash->movm_args)
2239 bytes += 2;
2240
2241 if (sym_hash->stack_size && sym_hash->stack_size <= 128)
2242 bytes += 3;
2243 else if (sym_hash->stack_size
2244 && sym_hash->stack_size < 256)
2245 bytes += 4;
2246
2247 /* Note that we've deleted prologue bytes for this
2248 function. */
2249 sym_hash->flags |= MN10300_DELETED_PROLOGUE_BYTES;
2250
2251 /* Actually delete the bytes. */
2252 if (!mn10300_elf_relax_delete_bytes (input_bfd,
2253 section,
2254 isym->st_value,
2255 bytes))
2256 goto error_return;
2257
2258 /* Something changed. Not strictly necessary, but
2259 may lead to more relaxing opportunities. */
2260 *again = TRUE;
2261 }
2262 }
2263
2264 /* Look for any global functions in this section which
2265 need insns deleted from their prologues. */
2266 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
2267 - symtab_hdr->sh_info);
2268 hashes = elf_sym_hashes (input_bfd);
2269 end_hashes = hashes + symcount;
2270 for (; hashes < end_hashes; hashes++)
2271 {
2272 struct elf32_mn10300_link_hash_entry *sym_hash;
2273
2274 sym_hash = (struct elf32_mn10300_link_hash_entry *) *hashes;
2275 if ((sym_hash->root.root.type == bfd_link_hash_defined
2276 || sym_hash->root.root.type == bfd_link_hash_defweak)
2277 && sym_hash->root.root.u.def.section == section
2278 && ! (sym_hash->flags & MN10300_CONVERT_CALL_TO_CALLS)
2279 && ! (sym_hash->flags & MN10300_DELETED_PROLOGUE_BYTES))
2280 {
2281 int bytes = 0;
2282 bfd_vma symval;
2283
2284 /* Note that we've changed things. */
2285 elf_section_data (section)->relocs = internal_relocs;
2286 elf_section_data (section)->this_hdr.contents = contents;
2287 symtab_hdr->contents = (unsigned char *) isymbuf;
2288
2289 /* Count how many bytes we're going to delete. */
2290 if (sym_hash->movm_args)
2291 bytes += 2;
2292
2293 if (sym_hash->stack_size && sym_hash->stack_size <= 128)
2294 bytes += 3;
2295 else if (sym_hash->stack_size
2296 && sym_hash->stack_size < 256)
2297 bytes += 4;
2298
2299 /* Note that we've deleted prologue bytes for this
2300 function. */
2301 sym_hash->flags |= MN10300_DELETED_PROLOGUE_BYTES;
2302
2303 /* Actually delete the bytes. */
2304 symval = sym_hash->root.root.u.def.value;
2305 if (!mn10300_elf_relax_delete_bytes (input_bfd,
2306 section,
2307 symval,
2308 bytes))
2309 goto error_return;
2310
2311 /* Something changed. Not strictly necessary, but
2312 may lead to more relaxing opportunities. */
2313 *again = TRUE;
2314 }
2315 }
2316
2317 /* Cache or free any memory we allocated for the relocs. */
2318 if (internal_relocs != NULL
2319 && elf_section_data (section)->relocs != internal_relocs)
2320 free (internal_relocs);
2321 internal_relocs = NULL;
2322
2323 /* Cache or free any memory we allocated for the contents. */
2324 if (contents != NULL
2325 && elf_section_data (section)->this_hdr.contents != contents)
2326 {
2327 if (! link_info->keep_memory)
2328 free (contents);
2329 else
2330 {
2331 /* Cache the section contents for elf_link_input_bfd. */
2332 elf_section_data (section)->this_hdr.contents = contents;
2333 }
2334 }
2335 contents = NULL;
2336 }
2337
2338 /* Cache or free any memory we allocated for the symbols. */
2339 if (isymbuf != NULL
2340 && symtab_hdr->contents != (unsigned char *) isymbuf)
2341 {
2342 if (! link_info->keep_memory)
2343 free (isymbuf);
2344 else
2345 {
2346 /* Cache the symbols for elf_link_input_bfd. */
2347 symtab_hdr->contents = (unsigned char *) isymbuf;
2348 }
2349 }
2350 isymbuf = NULL;
2351 }
2352 }
2353
2354 /* (Re)initialize for the basic instruction shortening/relaxing pass. */
2355 contents = NULL;
2356 internal_relocs = NULL;
2357 isymbuf = NULL;
2358 /* For error_return. */
2359 section = sec;
2360
2361 /* We don't have to do anything for a relocatable link, if
2362 this section does not have relocs, or if this is not a
2363 code section. */
2364 if (link_info->relocatable
2365 || (sec->flags & SEC_RELOC) == 0
2366 || sec->reloc_count == 0
2367 || (sec->flags & SEC_CODE) == 0)
2368 return TRUE;
2369
2370 /* If this is the first time we have been called for this section,
2371 initialize the cooked size. */
2372 if (sec->_cooked_size == 0)
2373 sec->_cooked_size = sec->_raw_size;
2374
2375 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2376
2377 /* Get a copy of the native relocations. */
2378 internal_relocs = (_bfd_elf_link_read_relocs
2379 (abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
2380 link_info->keep_memory));
2381 if (internal_relocs == NULL)
2382 goto error_return;
2383
2384 /* Walk through them looking for relaxing opportunities. */
2385 irelend = internal_relocs + sec->reloc_count;
2386 for (irel = internal_relocs; irel < irelend; irel++)
2387 {
2388 bfd_vma symval;
2389 struct elf32_mn10300_link_hash_entry *h = NULL;
2390
2391 /* If this isn't something that can be relaxed, then ignore
2392 this reloc. */
2393 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_NONE
2394 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_8
2395 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_MAX)
2396 continue;
2397
2398 /* Get the section contents if we haven't done so already. */
2399 if (contents == NULL)
2400 {
2401 /* Get cached copy if it exists. */
2402 if (elf_section_data (sec)->this_hdr.contents != NULL)
2403 contents = elf_section_data (sec)->this_hdr.contents;
2404 else
2405 {
2406 /* Go get them off disk. */
2407 contents = (bfd_byte *) bfd_malloc (sec->_raw_size);
2408 if (contents == NULL)
2409 goto error_return;
2410
2411 if (! bfd_get_section_contents (abfd, sec, contents,
2412 (file_ptr) 0, sec->_raw_size))
2413 goto error_return;
2414 }
2415 }
2416
2417 /* Read this BFD's symbols if we haven't done so already. */
2418 if (isymbuf == NULL && symtab_hdr->sh_info != 0)
2419 {
2420 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
2421 if (isymbuf == NULL)
2422 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
2423 symtab_hdr->sh_info, 0,
2424 NULL, NULL, NULL);
2425 if (isymbuf == NULL)
2426 goto error_return;
2427 }
2428
2429 /* Get the value of the symbol referred to by the reloc. */
2430 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
2431 {
2432 Elf_Internal_Sym *isym;
2433 asection *sym_sec = NULL;
2434 const char *sym_name;
2435 char *new_name;
2436
2437 /* A local symbol. */
2438 isym = isymbuf + ELF32_R_SYM (irel->r_info);
2439 if (isym->st_shndx == SHN_UNDEF)
2440 sym_sec = bfd_und_section_ptr;
2441 else if (isym->st_shndx == SHN_ABS)
2442 sym_sec = bfd_abs_section_ptr;
2443 else if (isym->st_shndx == SHN_COMMON)
2444 sym_sec = bfd_com_section_ptr;
2445 else
2446 sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
2447
2448 symval = (isym->st_value
2449 + sym_sec->output_section->vma
2450 + sym_sec->output_offset);
2451 sym_name = bfd_elf_string_from_elf_section (abfd,
2452 symtab_hdr->sh_link,
2453 isym->st_name);
2454
2455 /* Tack on an ID so we can uniquely identify this
2456 local symbol in the global hash table. */
2457 new_name = bfd_malloc ((bfd_size_type) strlen (sym_name) + 10);
2458 if (new_name == 0)
2459 goto error_return;
2460 sprintf (new_name, "%s_%08x", sym_name, (int) sym_sec);
2461 sym_name = new_name;
2462
2463 h = (struct elf32_mn10300_link_hash_entry *)
2464 elf_link_hash_lookup (&hash_table->static_hash_table->root,
2465 sym_name, FALSE, FALSE, FALSE);
2466 free (new_name);
2467 }
2468 else
2469 {
2470 unsigned long indx;
2471
2472 /* An external symbol. */
2473 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
2474 h = (struct elf32_mn10300_link_hash_entry *)
2475 (elf_sym_hashes (abfd)[indx]);
2476 BFD_ASSERT (h != NULL);
2477 if (h->root.root.type != bfd_link_hash_defined
2478 && h->root.root.type != bfd_link_hash_defweak)
2479 {
2480 /* This appears to be a reference to an undefined
2481 symbol. Just ignore it--it will be caught by the
2482 regular reloc processing. */
2483 continue;
2484 }
2485
2486 symval = (h->root.root.u.def.value
2487 + h->root.root.u.def.section->output_section->vma
2488 + h->root.root.u.def.section->output_offset);
2489 }
2490
2491 /* For simplicity of coding, we are going to modify the section
2492 contents, the section relocs, and the BFD symbol table. We
2493 must tell the rest of the code not to free up this
2494 information. It would be possible to instead create a table
2495 of changes which have to be made, as is done in coff-mips.c;
2496 that would be more work, but would require less memory when
2497 the linker is run. */
2498
2499 /* Try to turn a 32bit pc-relative branch/call into a 16bit pc-relative
2500 branch/call, also deal with "call" -> "calls" conversions and
2501 insertion of prologue data into "call" instructions. */
2502 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL32
2503 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PLT32)
2504 {
2505 bfd_vma value = symval;
2506
2507 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PLT32
2508 && h != NULL
2509 && ELF_ST_VISIBILITY (h->root.other) != STV_INTERNAL
2510 && ELF_ST_VISIBILITY (h->root.other) != STV_HIDDEN
2511 && h->root.plt.offset != (bfd_vma) -1)
2512 {
2513 asection * splt;
2514
2515 splt = bfd_get_section_by_name (elf_hash_table (link_info)
2516 ->dynobj, ".plt");
2517
2518 value = ((splt->output_section->vma
2519 + splt->output_offset
2520 + h->root.plt.offset)
2521 - (sec->output_section->vma
2522 + sec->output_offset
2523 + irel->r_offset));
2524 }
2525
2526 /* If we've got a "call" instruction that needs to be turned
2527 into a "calls" instruction, do so now. It saves a byte. */
2528 if (h && (h->flags & MN10300_CONVERT_CALL_TO_CALLS))
2529 {
2530 unsigned char code;
2531
2532 /* Get the opcode. */
2533 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2534
2535 /* Make sure we're working with a "call" instruction! */
2536 if (code == 0xdd)
2537 {
2538 /* Note that we've changed the relocs, section contents,
2539 etc. */
2540 elf_section_data (sec)->relocs = internal_relocs;
2541 elf_section_data (sec)->this_hdr.contents = contents;
2542 symtab_hdr->contents = (unsigned char *) isymbuf;
2543
2544 /* Fix the opcode. */
2545 bfd_put_8 (abfd, 0xfc, contents + irel->r_offset - 1);
2546 bfd_put_8 (abfd, 0xff, contents + irel->r_offset);
2547
2548 /* Fix irel->r_offset and irel->r_addend. */
2549 irel->r_offset += 1;
2550 irel->r_addend += 1;
2551
2552 /* Delete one byte of data. */
2553 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2554 irel->r_offset + 3, 1))
2555 goto error_return;
2556
2557 /* That will change things, so, we should relax again.
2558 Note that this is not required, and it may be slow. */
2559 *again = TRUE;
2560 }
2561 }
2562 else if (h)
2563 {
2564 /* We've got a "call" instruction which needs some data
2565 from target function filled in. */
2566 unsigned char code;
2567
2568 /* Get the opcode. */
2569 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2570
2571 /* Insert data from the target function into the "call"
2572 instruction if needed. */
2573 if (code == 0xdd)
2574 {
2575 bfd_put_8 (abfd, h->movm_args, contents + irel->r_offset + 4);
2576 bfd_put_8 (abfd, h->stack_size + h->movm_stack_size,
2577 contents + irel->r_offset + 5);
2578 }
2579 }
2580
2581 /* Deal with pc-relative gunk. */
2582 value -= (sec->output_section->vma + sec->output_offset);
2583 value -= irel->r_offset;
2584 value += irel->r_addend;
2585
2586 /* See if the value will fit in 16 bits, note the high value is
2587 0x7fff + 2 as the target will be two bytes closer if we are
2588 able to relax. */
2589 if ((long) value < 0x8001 && (long) value > -0x8000)
2590 {
2591 unsigned char code;
2592
2593 /* Get the opcode. */
2594 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2595
2596 if (code != 0xdc && code != 0xdd && code != 0xff)
2597 continue;
2598
2599 /* Note that we've changed the relocs, section contents, etc. */
2600 elf_section_data (sec)->relocs = internal_relocs;
2601 elf_section_data (sec)->this_hdr.contents = contents;
2602 symtab_hdr->contents = (unsigned char *) isymbuf;
2603
2604 /* Fix the opcode. */
2605 if (code == 0xdc)
2606 bfd_put_8 (abfd, 0xcc, contents + irel->r_offset - 1);
2607 else if (code == 0xdd)
2608 bfd_put_8 (abfd, 0xcd, contents + irel->r_offset - 1);
2609 else if (code == 0xff)
2610 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
2611
2612 /* Fix the relocation's type. */
2613 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2614 (ELF32_R_TYPE (irel->r_info)
2615 == (int) R_MN10300_PLT32)
2616 ? R_MN10300_PLT16 :
2617 R_MN10300_PCREL16);
2618
2619 /* Delete two bytes of data. */
2620 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2621 irel->r_offset + 1, 2))
2622 goto error_return;
2623
2624 /* That will change things, so, we should relax again.
2625 Note that this is not required, and it may be slow. */
2626 *again = TRUE;
2627 }
2628 }
2629
2630 /* Try to turn a 16bit pc-relative branch into a 8bit pc-relative
2631 branch. */
2632 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL16)
2633 {
2634 bfd_vma value = symval;
2635
2636 /* If we've got a "call" instruction that needs to be turned
2637 into a "calls" instruction, do so now. It saves a byte. */
2638 if (h && (h->flags & MN10300_CONVERT_CALL_TO_CALLS))
2639 {
2640 unsigned char code;
2641
2642 /* Get the opcode. */
2643 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2644
2645 /* Make sure we're working with a "call" instruction! */
2646 if (code == 0xcd)
2647 {
2648 /* Note that we've changed the relocs, section contents,
2649 etc. */
2650 elf_section_data (sec)->relocs = internal_relocs;
2651 elf_section_data (sec)->this_hdr.contents = contents;
2652 symtab_hdr->contents = (unsigned char *) isymbuf;
2653
2654 /* Fix the opcode. */
2655 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 1);
2656 bfd_put_8 (abfd, 0xff, contents + irel->r_offset);
2657
2658 /* Fix irel->r_offset and irel->r_addend. */
2659 irel->r_offset += 1;
2660 irel->r_addend += 1;
2661
2662 /* Delete one byte of data. */
2663 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2664 irel->r_offset + 1, 1))
2665 goto error_return;
2666
2667 /* That will change things, so, we should relax again.
2668 Note that this is not required, and it may be slow. */
2669 *again = TRUE;
2670 }
2671 }
2672 else if (h)
2673 {
2674 unsigned char code;
2675
2676 /* Get the opcode. */
2677 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2678
2679 /* Insert data from the target function into the "call"
2680 instruction if needed. */
2681 if (code == 0xcd)
2682 {
2683 bfd_put_8 (abfd, h->movm_args, contents + irel->r_offset + 2);
2684 bfd_put_8 (abfd, h->stack_size + h->movm_stack_size,
2685 contents + irel->r_offset + 3);
2686 }
2687 }
2688
2689 /* Deal with pc-relative gunk. */
2690 value -= (sec->output_section->vma + sec->output_offset);
2691 value -= irel->r_offset;
2692 value += irel->r_addend;
2693
2694 /* See if the value will fit in 8 bits, note the high value is
2695 0x7f + 1 as the target will be one bytes closer if we are
2696 able to relax. */
2697 if ((long) value < 0x80 && (long) value > -0x80)
2698 {
2699 unsigned char code;
2700
2701 /* Get the opcode. */
2702 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2703
2704 if (code != 0xcc)
2705 continue;
2706
2707 /* Note that we've changed the relocs, section contents, etc. */
2708 elf_section_data (sec)->relocs = internal_relocs;
2709 elf_section_data (sec)->this_hdr.contents = contents;
2710 symtab_hdr->contents = (unsigned char *) isymbuf;
2711
2712 /* Fix the opcode. */
2713 bfd_put_8 (abfd, 0xca, contents + irel->r_offset - 1);
2714
2715 /* Fix the relocation's type. */
2716 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2717 R_MN10300_PCREL8);
2718
2719 /* Delete one byte of data. */
2720 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2721 irel->r_offset + 1, 1))
2722 goto error_return;
2723
2724 /* That will change things, so, we should relax again.
2725 Note that this is not required, and it may be slow. */
2726 *again = TRUE;
2727 }
2728 }
2729
2730 /* Try to eliminate an unconditional 8 bit pc-relative branch
2731 which immediately follows a conditional 8 bit pc-relative
2732 branch around the unconditional branch.
2733
2734 original: new:
2735 bCC lab1 bCC' lab2
2736 bra lab2
2737 lab1: lab1:
2738
2739 This happens when the bCC can't reach lab2 at assembly time,
2740 but due to other relaxations it can reach at link time. */
2741 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL8)
2742 {
2743 Elf_Internal_Rela *nrel;
2744 bfd_vma value = symval;
2745 unsigned char code;
2746
2747 /* Deal with pc-relative gunk. */
2748 value -= (sec->output_section->vma + sec->output_offset);
2749 value -= irel->r_offset;
2750 value += irel->r_addend;
2751
2752 /* Do nothing if this reloc is the last byte in the section. */
2753 if (irel->r_offset == sec->_cooked_size)
2754 continue;
2755
2756 /* See if the next instruction is an unconditional pc-relative
2757 branch, more often than not this test will fail, so we
2758 test it first to speed things up. */
2759 code = bfd_get_8 (abfd, contents + irel->r_offset + 1);
2760 if (code != 0xca)
2761 continue;
2762
2763 /* Also make sure the next relocation applies to the next
2764 instruction and that it's a pc-relative 8 bit branch. */
2765 nrel = irel + 1;
2766 if (nrel == irelend
2767 || irel->r_offset + 2 != nrel->r_offset
2768 || ELF32_R_TYPE (nrel->r_info) != (int) R_MN10300_PCREL8)
2769 continue;
2770
2771 /* Make sure our destination immediately follows the
2772 unconditional branch. */
2773 if (symval != (sec->output_section->vma + sec->output_offset
2774 + irel->r_offset + 3))
2775 continue;
2776
2777 /* Now make sure we are a conditional branch. This may not
2778 be necessary, but why take the chance.
2779
2780 Note these checks assume that R_MN10300_PCREL8 relocs
2781 only occur on bCC and bCCx insns. If they occured
2782 elsewhere, we'd need to know the start of this insn
2783 for this check to be accurate. */
2784 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2785 if (code != 0xc0 && code != 0xc1 && code != 0xc2
2786 && code != 0xc3 && code != 0xc4 && code != 0xc5
2787 && code != 0xc6 && code != 0xc7 && code != 0xc8
2788 && code != 0xc9 && code != 0xe8 && code != 0xe9
2789 && code != 0xea && code != 0xeb)
2790 continue;
2791
2792 /* We also have to be sure there is no symbol/label
2793 at the unconditional branch. */
2794 if (mn10300_elf_symbol_address_p (abfd, sec, isymbuf,
2795 irel->r_offset + 1))
2796 continue;
2797
2798 /* Note that we've changed the relocs, section contents, etc. */
2799 elf_section_data (sec)->relocs = internal_relocs;
2800 elf_section_data (sec)->this_hdr.contents = contents;
2801 symtab_hdr->contents = (unsigned char *) isymbuf;
2802
2803 /* Reverse the condition of the first branch. */
2804 switch (code)
2805 {
2806 case 0xc8:
2807 code = 0xc9;
2808 break;
2809 case 0xc9:
2810 code = 0xc8;
2811 break;
2812 case 0xc0:
2813 code = 0xc2;
2814 break;
2815 case 0xc2:
2816 code = 0xc0;
2817 break;
2818 case 0xc3:
2819 code = 0xc1;
2820 break;
2821 case 0xc1:
2822 code = 0xc3;
2823 break;
2824 case 0xc4:
2825 code = 0xc6;
2826 break;
2827 case 0xc6:
2828 code = 0xc4;
2829 break;
2830 case 0xc7:
2831 code = 0xc5;
2832 break;
2833 case 0xc5:
2834 code = 0xc7;
2835 break;
2836 case 0xe8:
2837 code = 0xe9;
2838 break;
2839 case 0x9d:
2840 code = 0xe8;
2841 break;
2842 case 0xea:
2843 code = 0xeb;
2844 break;
2845 case 0xeb:
2846 code = 0xea;
2847 break;
2848 }
2849 bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
2850
2851 /* Set the reloc type and symbol for the first branch
2852 from the second branch. */
2853 irel->r_info = nrel->r_info;
2854
2855 /* Make the reloc for the second branch a null reloc. */
2856 nrel->r_info = ELF32_R_INFO (ELF32_R_SYM (nrel->r_info),
2857 R_MN10300_NONE);
2858
2859 /* Delete two bytes of data. */
2860 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2861 irel->r_offset + 1, 2))
2862 goto error_return;
2863
2864 /* That will change things, so, we should relax again.
2865 Note that this is not required, and it may be slow. */
2866 *again = TRUE;
2867 }
2868
2869 /* Try to turn a 24 immediate, displacement or absolute address
2870 into a 8 immediate, displacement or absolute address. */
2871 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_24)
2872 {
2873 bfd_vma value = symval;
2874 value += irel->r_addend;
2875
2876 /* See if the value will fit in 8 bits. */
2877 if ((long) value < 0x7f && (long) value > -0x80)
2878 {
2879 unsigned char code;
2880
2881 /* AM33 insns which have 24 operands are 6 bytes long and
2882 will have 0xfd as the first byte. */
2883
2884 /* Get the first opcode. */
2885 code = bfd_get_8 (abfd, contents + irel->r_offset - 3);
2886
2887 if (code == 0xfd)
2888 {
2889 /* Get the second opcode. */
2890 code = bfd_get_8 (abfd, contents + irel->r_offset - 2);
2891
2892 /* We can not relax 0x6b, 0x7b, 0x8b, 0x9b as no 24bit
2893 equivalent instructions exists. */
2894 if (code != 0x6b && code != 0x7b
2895 && code != 0x8b && code != 0x9b
2896 && ((code & 0x0f) == 0x09 || (code & 0x0f) == 0x08
2897 || (code & 0x0f) == 0x0a || (code & 0x0f) == 0x0b
2898 || (code & 0x0f) == 0x0e))
2899 {
2900 /* Not safe if the high bit is on as relaxing may
2901 move the value out of high mem and thus not fit
2902 in a signed 8bit value. This is currently over
2903 conservative. */
2904 if ((value & 0x80) == 0)
2905 {
2906 /* Note that we've changed the relocation contents,
2907 etc. */
2908 elf_section_data (sec)->relocs = internal_relocs;
2909 elf_section_data (sec)->this_hdr.contents = contents;
2910 symtab_hdr->contents = (unsigned char *) isymbuf;
2911
2912 /* Fix the opcode. */
2913 bfd_put_8 (abfd, 0xfb, contents + irel->r_offset - 3);
2914 bfd_put_8 (abfd, code, contents + irel->r_offset - 2);
2915
2916 /* Fix the relocation's type. */
2917 irel->r_info =
2918 ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2919 R_MN10300_8);
2920
2921 /* Delete two bytes of data. */
2922 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2923 irel->r_offset + 1, 2))
2924 goto error_return;
2925
2926 /* That will change things, so, we should relax
2927 again. Note that this is not required, and it
2928 may be slow. */
2929 *again = TRUE;
2930 break;
2931 }
2932 }
2933 }
2934 }
2935 }
2936
2937 /* Try to turn a 32bit immediate, displacement or absolute address
2938 into a 16bit immediate, displacement or absolute address. */
2939 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_32
2940 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOT32
2941 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOTOFF32
2942 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOTPC32)
2943 {
2944 bfd_vma value = symval;
2945
2946 if (ELF32_R_TYPE (irel->r_info) != (int) R_MN10300_32)
2947 {
2948 asection * sgot;
2949
2950 sgot = bfd_get_section_by_name (elf_hash_table (link_info)
2951 ->dynobj, ".got");
2952
2953 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOT32)
2954 {
2955 value = sgot->output_offset;
2956
2957 if (h)
2958 value += h->root.got.offset;
2959 else
2960 value += (elf_local_got_offsets
2961 (abfd)[ELF32_R_SYM (irel->r_info)]);
2962 }
2963 else if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOTOFF32)
2964 value -= sgot->output_section->vma;
2965 else if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOTPC32)
2966 value = (sgot->output_section->vma
2967 - (sec->output_section->vma
2968 + sec->output_offset
2969 + irel->r_offset));
2970 else
2971 abort ();
2972 }
2973
2974 value += irel->r_addend;
2975
2976 /* See if the value will fit in 24 bits.
2977 We allow any 16bit match here. We prune those we can't
2978 handle below. */
2979 if ((long) value < 0x7fffff && (long) value > -0x800000)
2980 {
2981 unsigned char code;
2982
2983 /* AM33 insns which have 32bit operands are 7 bytes long and
2984 will have 0xfe as the first byte. */
2985
2986 /* Get the first opcode. */
2987 code = bfd_get_8 (abfd, contents + irel->r_offset - 3);
2988
2989 if (code == 0xfe)
2990 {
2991 /* Get the second opcode. */
2992 code = bfd_get_8 (abfd, contents + irel->r_offset - 2);
2993
2994 /* All the am33 32 -> 24 relaxing possibilities. */
2995 /* We can not relax 0x6b, 0x7b, 0x8b, 0x9b as no 24bit
2996 equivalent instructions exists. */
2997 if (code != 0x6b && code != 0x7b
2998 && code != 0x8b && code != 0x9b
2999 && (ELF32_R_TYPE (irel->r_info)
3000 != (int) R_MN10300_GOTPC32)
3001 && ((code & 0x0f) == 0x09 || (code & 0x0f) == 0x08
3002 || (code & 0x0f) == 0x0a || (code & 0x0f) == 0x0b
3003 || (code & 0x0f) == 0x0e))
3004 {
3005 /* Not safe if the high bit is on as relaxing may
3006 move the value out of high mem and thus not fit
3007 in a signed 16bit value. This is currently over
3008 conservative. */
3009 if ((value & 0x8000) == 0)
3010 {
3011 /* Note that we've changed the relocation contents,
3012 etc. */
3013 elf_section_data (sec)->relocs = internal_relocs;
3014 elf_section_data (sec)->this_hdr.contents = contents;
3015 symtab_hdr->contents = (unsigned char *) isymbuf;
3016
3017 /* Fix the opcode. */
3018 bfd_put_8 (abfd, 0xfd, contents + irel->r_offset - 3);
3019 bfd_put_8 (abfd, code, contents + irel->r_offset - 2);
3020
3021 /* Fix the relocation's type. */
3022 irel->r_info =
3023 ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3024 (ELF32_R_TYPE (irel->r_info)
3025 == (int) R_MN10300_GOTOFF32)
3026 ? R_MN10300_GOTOFF24
3027 : (ELF32_R_TYPE (irel->r_info)
3028 == (int) R_MN10300_GOT32)
3029 ? R_MN10300_GOT24 :
3030 R_MN10300_24);
3031
3032 /* Delete one byte of data. */
3033 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3034 irel->r_offset + 3, 1))
3035 goto error_return;
3036
3037 /* That will change things, so, we should relax
3038 again. Note that this is not required, and it
3039 may be slow. */
3040 *again = TRUE;
3041 break;
3042 }
3043 }
3044 }
3045 }
3046
3047 /* See if the value will fit in 16 bits.
3048 We allow any 16bit match here. We prune those we can't
3049 handle below. */
3050 if ((long) value < 0x7fff && (long) value > -0x8000)
3051 {
3052 unsigned char code;
3053
3054 /* Most insns which have 32bit operands are 6 bytes long;
3055 exceptions are pcrel insns and bit insns.
3056
3057 We handle pcrel insns above. We don't bother trying
3058 to handle the bit insns here.
3059
3060 The first byte of the remaining insns will be 0xfc. */
3061
3062 /* Get the first opcode. */
3063 code = bfd_get_8 (abfd, contents + irel->r_offset - 2);
3064
3065 if (code != 0xfc)
3066 continue;
3067
3068 /* Get the second opcode. */
3069 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
3070
3071 if ((code & 0xf0) < 0x80)
3072 switch (code & 0xf0)
3073 {
3074 /* mov (d32,am),dn -> mov (d32,am),dn
3075 mov dm,(d32,am) -> mov dn,(d32,am)
3076 mov (d32,am),an -> mov (d32,am),an
3077 mov dm,(d32,am) -> mov dn,(d32,am)
3078 movbu (d32,am),dn -> movbu (d32,am),dn
3079 movbu dm,(d32,am) -> movbu dn,(d32,am)
3080 movhu (d32,am),dn -> movhu (d32,am),dn
3081 movhu dm,(d32,am) -> movhu dn,(d32,am) */
3082 case 0x00:
3083 case 0x10:
3084 case 0x20:
3085 case 0x30:
3086 case 0x40:
3087 case 0x50:
3088 case 0x60:
3089 case 0x70:
3090 /* Not safe if the high bit is on as relaxing may
3091 move the value out of high mem and thus not fit
3092 in a signed 16bit value. */
3093 if (code == 0xcc
3094 && (value & 0x8000))
3095 continue;
3096
3097 /* Note that we've changed the relocation contents, etc. */
3098 elf_section_data (sec)->relocs = internal_relocs;
3099 elf_section_data (sec)->this_hdr.contents = contents;
3100 symtab_hdr->contents = (unsigned char *) isymbuf;
3101
3102 /* Fix the opcode. */
3103 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
3104 bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
3105
3106 /* Fix the relocation's type. */
3107 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3108 (ELF32_R_TYPE (irel->r_info)
3109 == (int) R_MN10300_GOTOFF32)
3110 ? R_MN10300_GOTOFF16
3111 : (ELF32_R_TYPE (irel->r_info)
3112 == (int) R_MN10300_GOT32)
3113 ? R_MN10300_GOT16
3114 : (ELF32_R_TYPE (irel->r_info)
3115 == (int) R_MN10300_GOTPC32)
3116 ? R_MN10300_GOTPC16 :
3117 R_MN10300_16);
3118
3119 /* Delete two bytes of data. */
3120 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3121 irel->r_offset + 2, 2))
3122 goto error_return;
3123
3124 /* That will change things, so, we should relax again.
3125 Note that this is not required, and it may be slow. */
3126 *again = TRUE;
3127 break;
3128 }
3129 else if ((code & 0xf0) == 0x80
3130 || (code & 0xf0) == 0x90)
3131 switch (code & 0xf3)
3132 {
3133 /* mov dn,(abs32) -> mov dn,(abs16)
3134 movbu dn,(abs32) -> movbu dn,(abs16)
3135 movhu dn,(abs32) -> movhu dn,(abs16) */
3136 case 0x81:
3137 case 0x82:
3138 case 0x83:
3139 /* Note that we've changed the relocation contents, etc. */
3140 elf_section_data (sec)->relocs = internal_relocs;
3141 elf_section_data (sec)->this_hdr.contents = contents;
3142 symtab_hdr->contents = (unsigned char *) isymbuf;
3143
3144 if ((code & 0xf3) == 0x81)
3145 code = 0x01 + (code & 0x0c);
3146 else if ((code & 0xf3) == 0x82)
3147 code = 0x02 + (code & 0x0c);
3148 else if ((code & 0xf3) == 0x83)
3149 code = 0x03 + (code & 0x0c);
3150 else
3151 abort ();
3152
3153 /* Fix the opcode. */
3154 bfd_put_8 (abfd, code, contents + irel->r_offset - 2);
3155
3156 /* Fix the relocation's type. */
3157 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3158 (ELF32_R_TYPE (irel->r_info)
3159 == (int) R_MN10300_GOTOFF32)
3160 ? R_MN10300_GOTOFF16
3161 : (ELF32_R_TYPE (irel->r_info)
3162 == (int) R_MN10300_GOT32)
3163 ? R_MN10300_GOT16
3164 : (ELF32_R_TYPE (irel->r_info)
3165 == (int) R_MN10300_GOTPC32)
3166 ? R_MN10300_GOTPC16 :
3167 R_MN10300_16);
3168
3169 /* The opcode got shorter too, so we have to fix the
3170 addend and offset too! */
3171 irel->r_offset -= 1;
3172
3173 /* Delete three bytes of data. */
3174 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3175 irel->r_offset + 1, 3))
3176 goto error_return;
3177
3178 /* That will change things, so, we should relax again.
3179 Note that this is not required, and it may be slow. */
3180 *again = TRUE;
3181 break;
3182
3183 /* mov am,(abs32) -> mov am,(abs16)
3184 mov am,(d32,sp) -> mov am,(d16,sp)
3185 mov dm,(d32,sp) -> mov dm,(d32,sp)
3186 movbu dm,(d32,sp) -> movbu dm,(d32,sp)
3187 movhu dm,(d32,sp) -> movhu dm,(d32,sp) */
3188 case 0x80:
3189 case 0x90:
3190 case 0x91:
3191 case 0x92:
3192 case 0x93:
3193 /* sp-based offsets are zero-extended. */
3194 if (code >= 0x90 && code <= 0x93
3195 && (long)value < 0)
3196 continue;
3197
3198 /* Note that we've changed the relocation contents, etc. */
3199 elf_section_data (sec)->relocs = internal_relocs;
3200 elf_section_data (sec)->this_hdr.contents = contents;
3201 symtab_hdr->contents = (unsigned char *) isymbuf;
3202
3203 /* Fix the opcode. */
3204 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
3205 bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
3206
3207 /* Fix the relocation's type. */
3208 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3209 (ELF32_R_TYPE (irel->r_info)
3210 == (int) R_MN10300_GOTOFF32)
3211 ? R_MN10300_GOTOFF16
3212 : (ELF32_R_TYPE (irel->r_info)
3213 == (int) R_MN10300_GOT32)
3214 ? R_MN10300_GOT16
3215 : (ELF32_R_TYPE (irel->r_info)
3216 == (int) R_MN10300_GOTPC32)
3217 ? R_MN10300_GOTPC16 :
3218 R_MN10300_16);
3219
3220 /* Delete two bytes of data. */
3221 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3222 irel->r_offset + 2, 2))
3223 goto error_return;
3224
3225 /* That will change things, so, we should relax again.
3226 Note that this is not required, and it may be slow. */
3227 *again = TRUE;
3228 break;
3229 }
3230 else if ((code & 0xf0) < 0xf0)
3231 switch (code & 0xfc)
3232 {
3233 /* mov imm32,dn -> mov imm16,dn
3234 mov imm32,an -> mov imm16,an
3235 mov (abs32),dn -> mov (abs16),dn
3236 movbu (abs32),dn -> movbu (abs16),dn
3237 movhu (abs32),dn -> movhu (abs16),dn */
3238 case 0xcc:
3239 case 0xdc:
3240 case 0xa4:
3241 case 0xa8:
3242 case 0xac:
3243 /* Not safe if the high bit is on as relaxing may
3244 move the value out of high mem and thus not fit
3245 in a signed 16bit value. */
3246 if (code == 0xcc
3247 && (value & 0x8000))
3248 continue;
3249
3250 /* mov imm16, an zero-extends the immediate. */
3251 if (code == 0xdc
3252 && (long)value < 0)
3253 continue;
3254
3255 /* Note that we've changed the relocation contents, etc. */
3256 elf_section_data (sec)->relocs = internal_relocs;
3257 elf_section_data (sec)->this_hdr.contents = contents;
3258 symtab_hdr->contents = (unsigned char *) isymbuf;
3259
3260 if ((code & 0xfc) == 0xcc)
3261 code = 0x2c + (code & 0x03);
3262 else if ((code & 0xfc) == 0xdc)
3263 code = 0x24 + (code & 0x03);
3264 else if ((code & 0xfc) == 0xa4)
3265 code = 0x30 + (code & 0x03);
3266 else if ((code & 0xfc) == 0xa8)
3267 code = 0x34 + (code & 0x03);
3268 else if ((code & 0xfc) == 0xac)
3269 code = 0x38 + (code & 0x03);
3270 else
3271 abort ();
3272
3273 /* Fix the opcode. */
3274 bfd_put_8 (abfd, code, contents + irel->r_offset - 2);
3275
3276 /* Fix the relocation's type. */
3277 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3278 (ELF32_R_TYPE (irel->r_info)
3279 == (int) R_MN10300_GOTOFF32)
3280 ? R_MN10300_GOTOFF16
3281 : (ELF32_R_TYPE (irel->r_info)
3282 == (int) R_MN10300_GOT32)
3283 ? R_MN10300_GOT16
3284 : (ELF32_R_TYPE (irel->r_info)
3285 == (int) R_MN10300_GOTPC32)
3286 ? R_MN10300_GOTPC16 :
3287 R_MN10300_16);
3288
3289 /* The opcode got shorter too, so we have to fix the
3290 addend and offset too! */
3291 irel->r_offset -= 1;
3292
3293 /* Delete three bytes of data. */
3294 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3295 irel->r_offset + 1, 3))
3296 goto error_return;
3297
3298 /* That will change things, so, we should relax again.
3299 Note that this is not required, and it may be slow. */
3300 *again = TRUE;
3301 break;
3302
3303 /* mov (abs32),an -> mov (abs16),an
3304 mov (d32,sp),an -> mov (d16,sp),an
3305 mov (d32,sp),dn -> mov (d16,sp),dn
3306 movbu (d32,sp),dn -> movbu (d16,sp),dn
3307 movhu (d32,sp),dn -> movhu (d16,sp),dn
3308 add imm32,dn -> add imm16,dn
3309 cmp imm32,dn -> cmp imm16,dn
3310 add imm32,an -> add imm16,an
3311 cmp imm32,an -> cmp imm16,an
3312 and imm32,dn -> and imm16,dn
3313 or imm32,dn -> or imm16,dn
3314 xor imm32,dn -> xor imm16,dn
3315 btst imm32,dn -> btst imm16,dn */
3316
3317 case 0xa0:
3318 case 0xb0:
3319 case 0xb1:
3320 case 0xb2:
3321 case 0xb3:
3322 case 0xc0:
3323 case 0xc8:
3324
3325 case 0xd0:
3326 case 0xd8:
3327 case 0xe0:
3328 case 0xe1:
3329 case 0xe2:
3330 case 0xe3:
3331 /* cmp imm16, an zero-extends the immediate. */
3332 if (code == 0xdc
3333 && (long)value < 0)
3334 continue;
3335
3336 /* So do sp-based offsets. */
3337 if (code >= 0xb0 && code <= 0xb3
3338 && (long)value < 0)
3339 continue;
3340
3341 /* Note that we've changed the relocation contents, etc. */
3342 elf_section_data (sec)->relocs = internal_relocs;
3343 elf_section_data (sec)->this_hdr.contents = contents;
3344 symtab_hdr->contents = (unsigned char *) isymbuf;
3345
3346 /* Fix the opcode. */
3347 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
3348 bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
3349
3350 /* Fix the relocation's type. */
3351 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3352 (ELF32_R_TYPE (irel->r_info)
3353 == (int) R_MN10300_GOTOFF32)
3354 ? R_MN10300_GOTOFF16
3355 : (ELF32_R_TYPE (irel->r_info)
3356 == (int) R_MN10300_GOT32)
3357 ? R_MN10300_GOT16
3358 : (ELF32_R_TYPE (irel->r_info)
3359 == (int) R_MN10300_GOTPC32)
3360 ? R_MN10300_GOTPC16 :
3361 R_MN10300_16);
3362
3363 /* Delete two bytes of data. */
3364 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3365 irel->r_offset + 2, 2))
3366 goto error_return;
3367
3368 /* That will change things, so, we should relax again.
3369 Note that this is not required, and it may be slow. */
3370 *again = TRUE;
3371 break;
3372 }
3373 else if (code == 0xfe)
3374 {
3375 /* add imm32,sp -> add imm16,sp */
3376
3377 /* Note that we've changed the relocation contents, etc. */
3378 elf_section_data (sec)->relocs = internal_relocs;
3379 elf_section_data (sec)->this_hdr.contents = contents;
3380 symtab_hdr->contents = (unsigned char *) isymbuf;
3381
3382 /* Fix the opcode. */
3383 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
3384 bfd_put_8 (abfd, 0xfe, contents + irel->r_offset - 1);
3385
3386 /* Fix the relocation's type. */
3387 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3388 (ELF32_R_TYPE (irel->r_info)
3389 == (int) R_MN10300_GOT32)
3390 ? R_MN10300_GOT16
3391 : (ELF32_R_TYPE (irel->r_info)
3392 == (int) R_MN10300_GOTOFF32)
3393 ? R_MN10300_GOTOFF16
3394 : (ELF32_R_TYPE (irel->r_info)
3395 == (int) R_MN10300_GOTPC32)
3396 ? R_MN10300_GOTPC16 :
3397 R_MN10300_16);
3398
3399 /* Delete two bytes of data. */
3400 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3401 irel->r_offset + 2, 2))
3402 goto error_return;
3403
3404 /* That will change things, so, we should relax again.
3405 Note that this is not required, and it may be slow. */
3406 *again = TRUE;
3407 break;
3408 }
3409 }
3410 }
3411 }
3412
3413 if (isymbuf != NULL
3414 && symtab_hdr->contents != (unsigned char *) isymbuf)
3415 {
3416 if (! link_info->keep_memory)
3417 free (isymbuf);
3418 else
3419 {
3420 /* Cache the symbols for elf_link_input_bfd. */
3421 symtab_hdr->contents = (unsigned char *) isymbuf;
3422 }
3423 }
3424
3425 if (contents != NULL
3426 && elf_section_data (sec)->this_hdr.contents != contents)
3427 {
3428 if (! link_info->keep_memory)
3429 free (contents);
3430 else
3431 {
3432 /* Cache the section contents for elf_link_input_bfd. */
3433 elf_section_data (sec)->this_hdr.contents = contents;
3434 }
3435 }
3436
3437 if (internal_relocs != NULL
3438 && elf_section_data (sec)->relocs != internal_relocs)
3439 free (internal_relocs);
3440
3441 return TRUE;
3442
3443 error_return:
3444 if (isymbuf != NULL
3445 && symtab_hdr->contents != (unsigned char *) isymbuf)
3446 free (isymbuf);
3447 if (contents != NULL
3448 && elf_section_data (section)->this_hdr.contents != contents)
3449 free (contents);
3450 if (internal_relocs != NULL
3451 && elf_section_data (section)->relocs != internal_relocs)
3452 free (internal_relocs);
3453
3454 return FALSE;
3455 }
3456
3457 /* Compute the stack size and movm arguments for the function
3458 referred to by HASH at address ADDR in section with
3459 contents CONTENTS, store the information in the hash table. */
3460 static void
3461 compute_function_info (abfd, hash, addr, contents)
3462 bfd *abfd;
3463 struct elf32_mn10300_link_hash_entry *hash;
3464 bfd_vma addr;
3465 unsigned char *contents;
3466 {
3467 unsigned char byte1, byte2;
3468 /* We only care about a very small subset of the possible prologue
3469 sequences here. Basically we look for:
3470
3471 movm [d2,d3,a2,a3],sp (optional)
3472 add <size>,sp (optional, and only for sizes which fit in an unsigned
3473 8 bit number)
3474
3475 If we find anything else, we quit. */
3476
3477 /* Look for movm [regs],sp */
3478 byte1 = bfd_get_8 (abfd, contents + addr);
3479 byte2 = bfd_get_8 (abfd, contents + addr + 1);
3480
3481 if (byte1 == 0xcf)
3482 {
3483 hash->movm_args = byte2;
3484 addr += 2;
3485 byte1 = bfd_get_8 (abfd, contents + addr);
3486 byte2 = bfd_get_8 (abfd, contents + addr + 1);
3487 }
3488
3489 /* Now figure out how much stack space will be allocated by the movm
3490 instruction. We need this kept separate from the funtion's normal
3491 stack space. */
3492 if (hash->movm_args)
3493 {
3494 /* Space for d2. */
3495 if (hash->movm_args & 0x80)
3496 hash->movm_stack_size += 4;
3497
3498 /* Space for d3. */
3499 if (hash->movm_args & 0x40)
3500 hash->movm_stack_size += 4;
3501
3502 /* Space for a2. */
3503 if (hash->movm_args & 0x20)
3504 hash->movm_stack_size += 4;
3505
3506 /* Space for a3. */
3507 if (hash->movm_args & 0x10)
3508 hash->movm_stack_size += 4;
3509
3510 /* "other" space. d0, d1, a0, a1, mdr, lir, lar, 4 byte pad. */
3511 if (hash->movm_args & 0x08)
3512 hash->movm_stack_size += 8 * 4;
3513
3514 if (bfd_get_mach (abfd) == bfd_mach_am33
3515 || bfd_get_mach (abfd) == bfd_mach_am33_2)
3516 {
3517 /* "exother" space. e0, e1, mdrq, mcrh, mcrl, mcvf */
3518 if (hash->movm_args & 0x1)
3519 hash->movm_stack_size += 6 * 4;
3520
3521 /* exreg1 space. e4, e5, e6, e7 */
3522 if (hash->movm_args & 0x2)
3523 hash->movm_stack_size += 4 * 4;
3524
3525 /* exreg0 space. e2, e3 */
3526 if (hash->movm_args & 0x4)
3527 hash->movm_stack_size += 2 * 4;
3528 }
3529 }
3530
3531 /* Now look for the two stack adjustment variants. */
3532 if (byte1 == 0xf8 && byte2 == 0xfe)
3533 {
3534 int temp = bfd_get_8 (abfd, contents + addr + 2);
3535 temp = ((temp & 0xff) ^ (~0x7f)) + 0x80;
3536
3537 hash->stack_size = -temp;
3538 }
3539 else if (byte1 == 0xfa && byte2 == 0xfe)
3540 {
3541 int temp = bfd_get_16 (abfd, contents + addr + 2);
3542 temp = ((temp & 0xffff) ^ (~0x7fff)) + 0x8000;
3543 temp = -temp;
3544
3545 if (temp < 255)
3546 hash->stack_size = temp;
3547 }
3548
3549 /* If the total stack to be allocated by the call instruction is more
3550 than 255 bytes, then we can't remove the stack adjustment by using
3551 "call" (we might still be able to remove the "movm" instruction. */
3552 if (hash->stack_size + hash->movm_stack_size > 255)
3553 hash->stack_size = 0;
3554
3555 return;
3556 }
3557
3558 /* Delete some bytes from a section while relaxing. */
3559
3560 static bfd_boolean
3561 mn10300_elf_relax_delete_bytes (abfd, sec, addr, count)
3562 bfd *abfd;
3563 asection *sec;
3564 bfd_vma addr;
3565 int count;
3566 {
3567 Elf_Internal_Shdr *symtab_hdr;
3568 unsigned int sec_shndx;
3569 bfd_byte *contents;
3570 Elf_Internal_Rela *irel, *irelend;
3571 Elf_Internal_Rela *irelalign;
3572 bfd_vma toaddr;
3573 Elf_Internal_Sym *isym, *isymend;
3574 struct elf_link_hash_entry **sym_hashes;
3575 struct elf_link_hash_entry **end_hashes;
3576 unsigned int symcount;
3577
3578 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
3579
3580 contents = elf_section_data (sec)->this_hdr.contents;
3581
3582 /* The deletion must stop at the next ALIGN reloc for an aligment
3583 power larger than the number of bytes we are deleting. */
3584
3585 irelalign = NULL;
3586 toaddr = sec->_cooked_size;
3587
3588 irel = elf_section_data (sec)->relocs;
3589 irelend = irel + sec->reloc_count;
3590
3591 /* Actually delete the bytes. */
3592 memmove (contents + addr, contents + addr + count,
3593 (size_t) (toaddr - addr - count));
3594 sec->_cooked_size -= count;
3595
3596 /* Adjust all the relocs. */
3597 for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
3598 {
3599 /* Get the new reloc address. */
3600 if ((irel->r_offset > addr
3601 && irel->r_offset < toaddr))
3602 irel->r_offset -= count;
3603 }
3604
3605 /* Adjust the local symbols defined in this section. */
3606 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3607 isym = (Elf_Internal_Sym *) symtab_hdr->contents;
3608 for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
3609 {
3610 if (isym->st_shndx == sec_shndx
3611 && isym->st_value > addr
3612 && isym->st_value < toaddr)
3613 isym->st_value -= count;
3614 }
3615
3616 /* Now adjust the global symbols defined in this section. */
3617 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
3618 - symtab_hdr->sh_info);
3619 sym_hashes = elf_sym_hashes (abfd);
3620 end_hashes = sym_hashes + symcount;
3621 for (; sym_hashes < end_hashes; sym_hashes++)
3622 {
3623 struct elf_link_hash_entry *sym_hash = *sym_hashes;
3624 if ((sym_hash->root.type == bfd_link_hash_defined
3625 || sym_hash->root.type == bfd_link_hash_defweak)
3626 && sym_hash->root.u.def.section == sec
3627 && sym_hash->root.u.def.value > addr
3628 && sym_hash->root.u.def.value < toaddr)
3629 {
3630 sym_hash->root.u.def.value -= count;
3631 }
3632 }
3633
3634 return TRUE;
3635 }
3636
3637 /* Return TRUE if a symbol exists at the given address, else return
3638 FALSE. */
3639 static bfd_boolean
3640 mn10300_elf_symbol_address_p (abfd, sec, isym, addr)
3641 bfd *abfd;
3642 asection *sec;
3643 Elf_Internal_Sym *isym;
3644 bfd_vma addr;
3645 {
3646 Elf_Internal_Shdr *symtab_hdr;
3647 unsigned int sec_shndx;
3648 Elf_Internal_Sym *isymend;
3649 struct elf_link_hash_entry **sym_hashes;
3650 struct elf_link_hash_entry **end_hashes;
3651 unsigned int symcount;
3652
3653 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
3654
3655 /* Examine all the symbols. */
3656 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3657 for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
3658 {
3659 if (isym->st_shndx == sec_shndx
3660 && isym->st_value == addr)
3661 return TRUE;
3662 }
3663
3664 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
3665 - symtab_hdr->sh_info);
3666 sym_hashes = elf_sym_hashes (abfd);
3667 end_hashes = sym_hashes + symcount;
3668 for (; sym_hashes < end_hashes; sym_hashes++)
3669 {
3670 struct elf_link_hash_entry *sym_hash = *sym_hashes;
3671 if ((sym_hash->root.type == bfd_link_hash_defined
3672 || sym_hash->root.type == bfd_link_hash_defweak)
3673 && sym_hash->root.u.def.section == sec
3674 && sym_hash->root.u.def.value == addr)
3675 return TRUE;
3676 }
3677
3678 return FALSE;
3679 }
3680
3681 /* This is a version of bfd_generic_get_relocated_section_contents
3682 which uses mn10300_elf_relocate_section. */
3683
3684 static bfd_byte *
3685 mn10300_elf_get_relocated_section_contents (output_bfd, link_info, link_order,
3686 data, relocatable, symbols)
3687 bfd *output_bfd;
3688 struct bfd_link_info *link_info;
3689 struct bfd_link_order *link_order;
3690 bfd_byte *data;
3691 bfd_boolean relocatable;
3692 asymbol **symbols;
3693 {
3694 Elf_Internal_Shdr *symtab_hdr;
3695 asection *input_section = link_order->u.indirect.section;
3696 bfd *input_bfd = input_section->owner;
3697 asection **sections = NULL;
3698 Elf_Internal_Rela *internal_relocs = NULL;
3699 Elf_Internal_Sym *isymbuf = NULL;
3700
3701 /* We only need to handle the case of relaxing, or of having a
3702 particular set of section contents, specially. */
3703 if (relocatable
3704 || elf_section_data (input_section)->this_hdr.contents == NULL)
3705 return bfd_generic_get_relocated_section_contents (output_bfd, link_info,
3706 link_order, data,
3707 relocatable,
3708 symbols);
3709
3710 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3711
3712 memcpy (data, elf_section_data (input_section)->this_hdr.contents,
3713 (size_t) input_section->_raw_size);
3714
3715 if ((input_section->flags & SEC_RELOC) != 0
3716 && input_section->reloc_count > 0)
3717 {
3718 asection **secpp;
3719 Elf_Internal_Sym *isym, *isymend;
3720 bfd_size_type amt;
3721
3722 internal_relocs = (_bfd_elf_link_read_relocs
3723 (input_bfd, input_section, (PTR) NULL,
3724 (Elf_Internal_Rela *) NULL, FALSE));
3725 if (internal_relocs == NULL)
3726 goto error_return;
3727
3728 if (symtab_hdr->sh_info != 0)
3729 {
3730 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
3731 if (isymbuf == NULL)
3732 isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
3733 symtab_hdr->sh_info, 0,
3734 NULL, NULL, NULL);
3735 if (isymbuf == NULL)
3736 goto error_return;
3737 }
3738
3739 amt = symtab_hdr->sh_info;
3740 amt *= sizeof (asection *);
3741 sections = (asection **) bfd_malloc (amt);
3742 if (sections == NULL && amt != 0)
3743 goto error_return;
3744
3745 isymend = isymbuf + symtab_hdr->sh_info;
3746 for (isym = isymbuf, secpp = sections; isym < isymend; ++isym, ++secpp)
3747 {
3748 asection *isec;
3749
3750 if (isym->st_shndx == SHN_UNDEF)
3751 isec = bfd_und_section_ptr;
3752 else if (isym->st_shndx == SHN_ABS)
3753 isec = bfd_abs_section_ptr;
3754 else if (isym->st_shndx == SHN_COMMON)
3755 isec = bfd_com_section_ptr;
3756 else
3757 isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx);
3758
3759 *secpp = isec;
3760 }
3761
3762 if (! mn10300_elf_relocate_section (output_bfd, link_info, input_bfd,
3763 input_section, data, internal_relocs,
3764 isymbuf, sections))
3765 goto error_return;
3766
3767 if (sections != NULL)
3768 free (sections);
3769 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
3770 free (isymbuf);
3771 if (internal_relocs != elf_section_data (input_section)->relocs)
3772 free (internal_relocs);
3773 }
3774
3775 return data;
3776
3777 error_return:
3778 if (sections != NULL)
3779 free (sections);
3780 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
3781 free (isymbuf);
3782 if (internal_relocs != NULL
3783 && internal_relocs != elf_section_data (input_section)->relocs)
3784 free (internal_relocs);
3785 return NULL;
3786 }
3787
3788 /* Assorted hash table functions. */
3789
3790 /* Initialize an entry in the link hash table. */
3791
3792 /* Create an entry in an MN10300 ELF linker hash table. */
3793
3794 static struct bfd_hash_entry *
3795 elf32_mn10300_link_hash_newfunc (entry, table, string)
3796 struct bfd_hash_entry *entry;
3797 struct bfd_hash_table *table;
3798 const char *string;
3799 {
3800 struct elf32_mn10300_link_hash_entry *ret =
3801 (struct elf32_mn10300_link_hash_entry *) entry;
3802
3803 /* Allocate the structure if it has not already been allocated by a
3804 subclass. */
3805 if (ret == (struct elf32_mn10300_link_hash_entry *) NULL)
3806 ret = ((struct elf32_mn10300_link_hash_entry *)
3807 bfd_hash_allocate (table,
3808 sizeof (struct elf32_mn10300_link_hash_entry)));
3809 if (ret == (struct elf32_mn10300_link_hash_entry *) NULL)
3810 return (struct bfd_hash_entry *) ret;
3811
3812 /* Call the allocation method of the superclass. */
3813 ret = ((struct elf32_mn10300_link_hash_entry *)
3814 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
3815 table, string));
3816 if (ret != (struct elf32_mn10300_link_hash_entry *) NULL)
3817 {
3818 ret->direct_calls = 0;
3819 ret->stack_size = 0;
3820 ret->movm_args = 0;
3821 ret->movm_stack_size = 0;
3822 ret->pcrel_relocs_copied = NULL;
3823 ret->flags = 0;
3824 }
3825
3826 return (struct bfd_hash_entry *) ret;
3827 }
3828
3829 /* Create an mn10300 ELF linker hash table. */
3830
3831 static struct bfd_link_hash_table *
3832 elf32_mn10300_link_hash_table_create (abfd)
3833 bfd *abfd;
3834 {
3835 struct elf32_mn10300_link_hash_table *ret;
3836 bfd_size_type amt = sizeof (struct elf32_mn10300_link_hash_table);
3837
3838 ret = (struct elf32_mn10300_link_hash_table *) bfd_malloc (amt);
3839 if (ret == (struct elf32_mn10300_link_hash_table *) NULL)
3840 return NULL;
3841
3842 if (! _bfd_elf_link_hash_table_init (&ret->root, abfd,
3843 elf32_mn10300_link_hash_newfunc))
3844 {
3845 free (ret);
3846 return NULL;
3847 }
3848
3849 ret->flags = 0;
3850 amt = sizeof (struct elf_link_hash_table);
3851 ret->static_hash_table
3852 = (struct elf32_mn10300_link_hash_table *) bfd_malloc (amt);
3853 if (ret->static_hash_table == NULL)
3854 {
3855 free (ret);
3856 return NULL;
3857 }
3858
3859 if (! _bfd_elf_link_hash_table_init (&ret->static_hash_table->root, abfd,
3860 elf32_mn10300_link_hash_newfunc))
3861 {
3862 free (ret->static_hash_table);
3863 free (ret);
3864 return NULL;
3865 }
3866 return &ret->root.root;
3867 }
3868
3869 /* Free an mn10300 ELF linker hash table. */
3870
3871 static void
3872 elf32_mn10300_link_hash_table_free (hash)
3873 struct bfd_link_hash_table *hash;
3874 {
3875 struct elf32_mn10300_link_hash_table *ret
3876 = (struct elf32_mn10300_link_hash_table *) hash;
3877
3878 _bfd_generic_link_hash_table_free
3879 ((struct bfd_link_hash_table *) ret->static_hash_table);
3880 _bfd_generic_link_hash_table_free
3881 ((struct bfd_link_hash_table *) ret);
3882 }
3883
3884 static unsigned long
3885 elf_mn10300_mach (flags)
3886 flagword flags;
3887 {
3888 switch (flags & EF_MN10300_MACH)
3889 {
3890 case E_MN10300_MACH_MN10300:
3891 default:
3892 return bfd_mach_mn10300;
3893
3894 case E_MN10300_MACH_AM33:
3895 return bfd_mach_am33;
3896
3897 case E_MN10300_MACH_AM33_2:
3898 return bfd_mach_am33_2;
3899 }
3900 }
3901
3902 /* The final processing done just before writing out a MN10300 ELF object
3903 file. This gets the MN10300 architecture right based on the machine
3904 number. */
3905
3906 void
3907 _bfd_mn10300_elf_final_write_processing (abfd, linker)
3908 bfd *abfd;
3909 bfd_boolean linker ATTRIBUTE_UNUSED;
3910 {
3911 unsigned long val;
3912
3913 switch (bfd_get_mach (abfd))
3914 {
3915 default:
3916 case bfd_mach_mn10300:
3917 val = E_MN10300_MACH_MN10300;
3918 break;
3919
3920 case bfd_mach_am33:
3921 val = E_MN10300_MACH_AM33;
3922 break;
3923
3924 case bfd_mach_am33_2:
3925 val = E_MN10300_MACH_AM33_2;
3926 break;
3927 }
3928
3929 elf_elfheader (abfd)->e_flags &= ~ (EF_MN10300_MACH);
3930 elf_elfheader (abfd)->e_flags |= val;
3931 }
3932
3933 bfd_boolean
3934 _bfd_mn10300_elf_object_p (abfd)
3935 bfd *abfd;
3936 {
3937 bfd_default_set_arch_mach (abfd, bfd_arch_mn10300,
3938 elf_mn10300_mach (elf_elfheader (abfd)->e_flags));
3939 return TRUE;
3940 }
3941
3942 /* Merge backend specific data from an object file to the output
3943 object file when linking. */
3944
3945 bfd_boolean
3946 _bfd_mn10300_elf_merge_private_bfd_data (ibfd, obfd)
3947 bfd *ibfd;
3948 bfd *obfd;
3949 {
3950 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3951 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3952 return TRUE;
3953
3954 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
3955 && bfd_get_mach (obfd) < bfd_get_mach (ibfd))
3956 {
3957 if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd),
3958 bfd_get_mach (ibfd)))
3959 return FALSE;
3960 }
3961
3962 return TRUE;
3963 }
3964
3965 #define PLT0_ENTRY_SIZE 15
3966 #define PLT_ENTRY_SIZE 20
3967 #define PIC_PLT_ENTRY_SIZE 24
3968
3969 static const bfd_byte elf_mn10300_plt0_entry[PLT0_ENTRY_SIZE] =
3970 {
3971 0xfc, 0xa0, 0, 0, 0, 0, /* mov (.got+8),a0 */
3972 0xfe, 0xe, 0x10, 0, 0, 0, 0, /* mov (.got+4),r1 */
3973 0xf0, 0xf4, /* jmp (a0) */
3974 };
3975
3976 static const bfd_byte elf_mn10300_plt_entry[PLT_ENTRY_SIZE] =
3977 {
3978 0xfc, 0xa0, 0, 0, 0, 0, /* mov (nameN@GOT + .got),a0 */
3979 0xf0, 0xf4, /* jmp (a0) */
3980 0xfe, 8, 0, 0, 0, 0, 0, /* mov reloc-table-address,r0 */
3981 0xdc, 0, 0, 0, 0, /* jmp .plt0 */
3982 };
3983
3984 static const bfd_byte elf_mn10300_pic_plt_entry[PIC_PLT_ENTRY_SIZE] =
3985 {
3986 0xfc, 0x22, 0, 0, 0, 0, /* mov (nameN@GOT,a2),a0 */
3987 0xf0, 0xf4, /* jmp (a0) */
3988 0xfe, 8, 0, 0, 0, 0, 0, /* mov reloc-table-address,r0 */
3989 0xf8, 0x22, 8, /* mov (8,a2),a0 */
3990 0xfb, 0xa, 0x1a, 4, /* mov (4,a2),r1 */
3991 0xf0, 0xf4, /* jmp (a0) */
3992 };
3993
3994 /* Return size of the first PLT entry. */
3995 #define elf_mn10300_sizeof_plt0(info) \
3996 (info->shared ? PIC_PLT_ENTRY_SIZE : PLT0_ENTRY_SIZE)
3997
3998 /* Return size of a PLT entry. */
3999 #define elf_mn10300_sizeof_plt(info) \
4000 (info->shared ? PIC_PLT_ENTRY_SIZE : PLT_ENTRY_SIZE)
4001
4002 /* Return offset of the PLT0 address in an absolute PLT entry. */
4003 #define elf_mn10300_plt_plt0_offset(info) 16
4004
4005 /* Return offset of the linker in PLT0 entry. */
4006 #define elf_mn10300_plt0_linker_offset(info) 2
4007
4008 /* Return offset of the GOT id in PLT0 entry. */
4009 #define elf_mn10300_plt0_gotid_offset(info) 9
4010
4011 /* Return offset of the tempoline in PLT entry */
4012 #define elf_mn10300_plt_temp_offset(info) 8
4013
4014 /* Return offset of the symbol in PLT entry. */
4015 #define elf_mn10300_plt_symbol_offset(info) 2
4016
4017 /* Return offset of the relocation in PLT entry. */
4018 #define elf_mn10300_plt_reloc_offset(info) 11
4019
4020 /* The name of the dynamic interpreter. This is put in the .interp
4021 section. */
4022
4023 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
4024
4025 /* Create dynamic sections when linking against a dynamic object. */
4026
4027 static bfd_boolean
4028 _bfd_mn10300_elf_create_dynamic_sections (abfd, info)
4029 bfd *abfd;
4030 struct bfd_link_info *info;
4031 {
4032 flagword flags;
4033 asection * s;
4034 const struct elf_backend_data * bed = get_elf_backend_data (abfd);
4035 int ptralign = 0;
4036
4037 switch (bed->s->arch_size)
4038 {
4039 case 32:
4040 ptralign = 2;
4041 break;
4042
4043 case 64:
4044 ptralign = 3;
4045 break;
4046
4047 default:
4048 bfd_set_error (bfd_error_bad_value);
4049 return FALSE;
4050 }
4051
4052 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
4053 .rel[a].bss sections. */
4054
4055 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4056 | SEC_LINKER_CREATED);
4057
4058 s = bfd_make_section (abfd,
4059 bed->default_use_rela_p ? ".rela.plt" : ".rel.plt");
4060 if (s == NULL
4061 || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
4062 || ! bfd_set_section_alignment (abfd, s, ptralign))
4063 return FALSE;
4064
4065 if (! _bfd_mn10300_elf_create_got_section (abfd, info))
4066 return FALSE;
4067
4068 {
4069 const char * secname;
4070 char * relname;
4071 flagword secflags;
4072 asection * sec;
4073
4074 for (sec = abfd->sections; sec; sec = sec->next)
4075 {
4076 secflags = bfd_get_section_flags (abfd, sec);
4077 if ((secflags & (SEC_DATA | SEC_LINKER_CREATED))
4078 || ((secflags & SEC_HAS_CONTENTS) != SEC_HAS_CONTENTS))
4079 continue;
4080
4081 secname = bfd_get_section_name (abfd, sec);
4082 relname = (char *) bfd_malloc (strlen (secname) + 6);
4083 strcpy (relname, ".rela");
4084 strcat (relname, secname);
4085
4086 s = bfd_make_section (abfd, relname);
4087 if (s == NULL
4088 || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
4089 || ! bfd_set_section_alignment (abfd, s, ptralign))
4090 return FALSE;
4091 }
4092 }
4093
4094 if (bed->want_dynbss)
4095 {
4096 /* The .dynbss section is a place to put symbols which are defined
4097 by dynamic objects, are referenced by regular objects, and are
4098 not functions. We must allocate space for them in the process
4099 image and use a R_*_COPY reloc to tell the dynamic linker to
4100 initialize them at run time. The linker script puts the .dynbss
4101 section into the .bss section of the final image. */
4102 s = bfd_make_section (abfd, ".dynbss");
4103 if (s == NULL
4104 || ! bfd_set_section_flags (abfd, s, SEC_ALLOC))
4105 return FALSE;
4106
4107 /* The .rel[a].bss section holds copy relocs. This section is not
4108 normally needed. We need to create it here, though, so that the
4109 linker will map it to an output section. We can't just create it
4110 only if we need it, because we will not know whether we need it
4111 until we have seen all the input files, and the first time the
4112 main linker code calls BFD after examining all the input files
4113 (size_dynamic_sections) the input sections have already been
4114 mapped to the output sections. If the section turns out not to
4115 be needed, we can discard it later. We will never need this
4116 section when generating a shared object, since they do not use
4117 copy relocs. */
4118 if (! info->shared)
4119 {
4120 s = bfd_make_section (abfd,
4121 (bed->default_use_rela_p
4122 ? ".rela.bss" : ".rel.bss"));
4123 if (s == NULL
4124 || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
4125 || ! bfd_set_section_alignment (abfd, s, ptralign))
4126 return FALSE;
4127 }
4128 }
4129
4130 return TRUE;
4131 }
4132 \f
4133 /* Adjust a symbol defined by a dynamic object and referenced by a
4134 regular object. The current definition is in some section of the
4135 dynamic object, but we're not including those sections. We have to
4136 change the definition to something the rest of the link can
4137 understand. */
4138
4139 static bfd_boolean
4140 _bfd_mn10300_elf_adjust_dynamic_symbol (info, h)
4141 struct bfd_link_info * info;
4142 struct elf_link_hash_entry * h;
4143 {
4144 bfd * dynobj;
4145 asection * s;
4146 unsigned int power_of_two;
4147
4148 dynobj = elf_hash_table (info)->dynobj;
4149
4150 /* Make sure we know what is going on here. */
4151 BFD_ASSERT (dynobj != NULL
4152 && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
4153 || h->weakdef != NULL
4154 || ((h->elf_link_hash_flags
4155 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
4156 && (h->elf_link_hash_flags
4157 & ELF_LINK_HASH_REF_REGULAR) != 0
4158 && (h->elf_link_hash_flags
4159 & ELF_LINK_HASH_DEF_REGULAR) == 0)));
4160
4161 /* If this is a function, put it in the procedure linkage table. We
4162 will fill in the contents of the procedure linkage table later,
4163 when we know the address of the .got section. */
4164 if (h->type == STT_FUNC
4165 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
4166 {
4167 if (! info->shared
4168 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
4169 && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0)
4170 {
4171 /* This case can occur if we saw a PLT reloc in an input
4172 file, but the symbol was never referred to by a dynamic
4173 object. In such a case, we don't actually need to build
4174 a procedure linkage table, and we can just do a REL32
4175 reloc instead. */
4176 BFD_ASSERT ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0);
4177 return TRUE;
4178 }
4179
4180 /* Make sure this symbol is output as a dynamic symbol. */
4181 if (h->dynindx == -1)
4182 {
4183 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
4184 return FALSE;
4185 }
4186
4187 s = bfd_get_section_by_name (dynobj, ".plt");
4188 BFD_ASSERT (s != NULL);
4189
4190 /* If this is the first .plt entry, make room for the special
4191 first entry. */
4192 if (s->_raw_size == 0)
4193 s->_raw_size += elf_mn10300_sizeof_plt0 (info);
4194
4195 /* If this symbol is not defined in a regular file, and we are
4196 not generating a shared library, then set the symbol to this
4197 location in the .plt. This is required to make function
4198 pointers compare as equal between the normal executable and
4199 the shared library. */
4200 if (! info->shared
4201 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
4202 {
4203 h->root.u.def.section = s;
4204 h->root.u.def.value = s->_raw_size;
4205 }
4206
4207 h->plt.offset = s->_raw_size;
4208
4209 /* Make room for this entry. */
4210 s->_raw_size += elf_mn10300_sizeof_plt (info);
4211
4212 /* We also need to make an entry in the .got.plt section, which
4213 will be placed in the .got section by the linker script. */
4214
4215 s = bfd_get_section_by_name (dynobj, ".got.plt");
4216 BFD_ASSERT (s != NULL);
4217 s->_raw_size += 4;
4218
4219 /* We also need to make an entry in the .rela.plt section. */
4220
4221 s = bfd_get_section_by_name (dynobj, ".rela.plt");
4222 BFD_ASSERT (s != NULL);
4223 s->_raw_size += sizeof (Elf32_External_Rela);
4224
4225 return TRUE;
4226 }
4227
4228 /* If this is a weak symbol, and there is a real definition, the
4229 processor independent code will have arranged for us to see the
4230 real definition first, and we can just use the same value. */
4231 if (h->weakdef != NULL)
4232 {
4233 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
4234 || h->weakdef->root.type == bfd_link_hash_defweak);
4235 h->root.u.def.section = h->weakdef->root.u.def.section;
4236 h->root.u.def.value = h->weakdef->root.u.def.value;
4237 return TRUE;
4238 }
4239
4240 /* This is a reference to a symbol defined by a dynamic object which
4241 is not a function. */
4242
4243 /* If we are creating a shared library, we must presume that the
4244 only references to the symbol are via the global offset table.
4245 For such cases we need not do anything here; the relocations will
4246 be handled correctly by relocate_section. */
4247 if (info->shared)
4248 return TRUE;
4249
4250 /* If there are no references to this symbol that do not use the
4251 GOT, we don't need to generate a copy reloc. */
4252 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
4253 return TRUE;
4254
4255 /* We must allocate the symbol in our .dynbss section, which will
4256 become part of the .bss section of the executable. There will be
4257 an entry for this symbol in the .dynsym section. The dynamic
4258 object will contain position independent code, so all references
4259 from the dynamic object to this symbol will go through the global
4260 offset table. The dynamic linker will use the .dynsym entry to
4261 determine the address it must put in the global offset table, so
4262 both the dynamic object and the regular object will refer to the
4263 same memory location for the variable. */
4264
4265 s = bfd_get_section_by_name (dynobj, ".dynbss");
4266 BFD_ASSERT (s != NULL);
4267
4268 /* We must generate a R_MN10300_COPY reloc to tell the dynamic linker to
4269 copy the initial value out of the dynamic object and into the
4270 runtime process image. We need to remember the offset into the
4271 .rela.bss section we are going to use. */
4272 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4273 {
4274 asection * srel;
4275
4276 srel = bfd_get_section_by_name (dynobj, ".rela.bss");
4277 BFD_ASSERT (srel != NULL);
4278 srel->_raw_size += sizeof (Elf32_External_Rela);
4279 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
4280 }
4281
4282 /* We need to figure out the alignment required for this symbol. I
4283 have no idea how ELF linkers handle this. */
4284 power_of_two = bfd_log2 (h->size);
4285 if (power_of_two > 3)
4286 power_of_two = 3;
4287
4288 /* Apply the required alignment. */
4289 s->_raw_size = BFD_ALIGN (s->_raw_size,
4290 (bfd_size_type) (1 << power_of_two));
4291 if (power_of_two > bfd_get_section_alignment (dynobj, s))
4292 {
4293 if (! bfd_set_section_alignment (dynobj, s, power_of_two))
4294 return FALSE;
4295 }
4296
4297 /* Define the symbol as being at this point in the section. */
4298 h->root.u.def.section = s;
4299 h->root.u.def.value = s->_raw_size;
4300
4301 /* Increment the section size to make room for the symbol. */
4302 s->_raw_size += h->size;
4303
4304 return TRUE;
4305 }
4306
4307 /* This function is called via elf32_mn10300_link_hash_traverse if we are
4308 creating a shared object with -Bsymbolic. It discards the space
4309 allocated to copy PC relative relocs against symbols which are
4310 defined in regular objects. We allocated space for them in the
4311 check_relocs routine, but we won't fill them in in the
4312 relocate_section routine. */
4313
4314 static bfd_boolean
4315 _bfd_mn10300_elf_discard_copies (h, info)
4316 struct elf32_mn10300_link_hash_entry *h;
4317 struct bfd_link_info *info;
4318 {
4319 struct elf_mn10300_pcrel_relocs_copied *s;
4320
4321 /* If a symbol has been forced local or we have found a regular
4322 definition for the symbolic link case, then we won't be needing
4323 any relocs. */
4324 if ((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
4325 && ((h->root.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0
4326 || info->symbolic))
4327 {
4328 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
4329 s->section->_raw_size -= s->count * sizeof (Elf32_External_Rel);
4330 }
4331
4332 return TRUE;
4333 }
4334
4335 /* Set the sizes of the dynamic sections. */
4336
4337 static bfd_boolean
4338 _bfd_mn10300_elf_size_dynamic_sections (output_bfd, info)
4339 bfd * output_bfd;
4340 struct bfd_link_info * info;
4341 {
4342 bfd * dynobj;
4343 asection * s;
4344 bfd_boolean plt;
4345 bfd_boolean relocs;
4346 bfd_boolean reltext;
4347
4348 dynobj = elf_hash_table (info)->dynobj;
4349 BFD_ASSERT (dynobj != NULL);
4350
4351 if (elf_hash_table (info)->dynamic_sections_created)
4352 {
4353 /* Set the contents of the .interp section to the interpreter. */
4354 if (! info->shared)
4355 {
4356 s = bfd_get_section_by_name (dynobj, ".interp");
4357 BFD_ASSERT (s != NULL);
4358 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
4359 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
4360 }
4361 }
4362 else
4363 {
4364 /* We may have created entries in the .rela.got section.
4365 However, if we are not creating the dynamic sections, we will
4366 not actually use these entries. Reset the size of .rela.got,
4367 which will cause it to get stripped from the output file
4368 below. */
4369 s = bfd_get_section_by_name (dynobj, ".rela.got");
4370 if (s != NULL)
4371 s->_raw_size = 0;
4372 }
4373
4374 /* If this is a -Bsymbolic shared link, then we need to discard all
4375 PC relative relocs against symbols defined in a regular object.
4376 We allocated space for them in the check_relocs routine, but we
4377 will not fill them in in the relocate_section routine. */
4378 if (info->shared && info->symbolic)
4379 elf32_mn10300_link_hash_traverse (elf32_mn10300_hash_table (info),
4380 _bfd_mn10300_elf_discard_copies,
4381 info);
4382
4383 /* The check_relocs and adjust_dynamic_symbol entry points have
4384 determined the sizes of the various dynamic sections. Allocate
4385 memory for them. */
4386 plt = FALSE;
4387 relocs = FALSE;
4388 reltext = FALSE;
4389 for (s = dynobj->sections; s != NULL; s = s->next)
4390 {
4391 const char * name;
4392 bfd_boolean strip;
4393
4394 if ((s->flags & SEC_LINKER_CREATED) == 0)
4395 continue;
4396
4397 /* It's OK to base decisions on the section name, because none
4398 of the dynobj section names depend upon the input files. */
4399 name = bfd_get_section_name (dynobj, s);
4400
4401 strip = FALSE;
4402
4403 if (strcmp (name, ".plt") == 0)
4404 {
4405 if (s->_raw_size == 0)
4406 /* Strip this section if we don't need it; see the
4407 comment below. */
4408 strip = TRUE;
4409 else
4410 /* Remember whether there is a PLT. */
4411 plt = TRUE;
4412 }
4413 else if (strncmp (name, ".rela", 5) == 0)
4414 {
4415 if (s->_raw_size == 0)
4416 {
4417 /* If we don't need this section, strip it from the
4418 output file. This is mostly to handle .rela.bss and
4419 .rela.plt. We must create both sections in
4420 create_dynamic_sections, because they must be created
4421 before the linker maps input sections to output
4422 sections. The linker does that before
4423 adjust_dynamic_symbol is called, and it is that
4424 function which decides whether anything needs to go
4425 into these sections. */
4426 strip = TRUE;
4427 }
4428 else
4429 {
4430 asection * target;
4431
4432 /* Remember whether there are any reloc sections other
4433 than .rela.plt. */
4434 if (strcmp (name, ".rela.plt") != 0)
4435 {
4436 const char * outname;
4437
4438 relocs = TRUE;
4439
4440 /* If this relocation section applies to a read only
4441 section, then we probably need a DT_TEXTREL
4442 entry. The entries in the .rela.plt section
4443 really apply to the .got section, which we
4444 created ourselves and so know is not readonly. */
4445 outname = bfd_get_section_name (output_bfd,
4446 s->output_section);
4447 target = bfd_get_section_by_name (output_bfd, outname + 5);
4448 if (target != NULL
4449 && (target->flags & SEC_READONLY) != 0
4450 && (target->flags & SEC_ALLOC) != 0)
4451 reltext = TRUE;
4452 }
4453
4454 /* We use the reloc_count field as a counter if we need
4455 to copy relocs into the output file. */
4456 s->reloc_count = 0;
4457 }
4458 }
4459 else if (strncmp (name, ".got", 4) != 0)
4460 /* It's not one of our sections, so don't allocate space. */
4461 continue;
4462
4463 if (strip)
4464 {
4465 _bfd_strip_section_from_output (info, s);
4466 continue;
4467 }
4468
4469 /* Allocate memory for the section contents. We use bfd_zalloc
4470 here in case unused entries are not reclaimed before the
4471 section's contents are written out. This should not happen,
4472 but this way if it does, we get a R_MN10300_NONE reloc
4473 instead of garbage. */
4474 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
4475 if (s->contents == NULL && s->_raw_size != 0)
4476 return FALSE;
4477 }
4478
4479 if (elf_hash_table (info)->dynamic_sections_created)
4480 {
4481 /* Add some entries to the .dynamic section. We fill in the
4482 values later, in _bfd_mn10300_elf_finish_dynamic_sections,
4483 but we must add the entries now so that we get the correct
4484 size for the .dynamic section. The DT_DEBUG entry is filled
4485 in by the dynamic linker and used by the debugger. */
4486 if (! info->shared)
4487 {
4488 if (! bfd_elf32_add_dynamic_entry (info, DT_DEBUG, 0))
4489 return FALSE;
4490 }
4491
4492 if (plt)
4493 {
4494 if (! bfd_elf32_add_dynamic_entry (info, DT_PLTGOT, 0)
4495 || ! bfd_elf32_add_dynamic_entry (info, DT_PLTRELSZ, 0)
4496 || ! bfd_elf32_add_dynamic_entry (info, DT_PLTREL, DT_RELA)
4497 || ! bfd_elf32_add_dynamic_entry (info, DT_JMPREL, 0))
4498 return FALSE;
4499 }
4500
4501 if (relocs)
4502 {
4503 if (! bfd_elf32_add_dynamic_entry (info, DT_RELA, 0)
4504 || ! bfd_elf32_add_dynamic_entry (info, DT_RELASZ, 0)
4505 || ! bfd_elf32_add_dynamic_entry (info, DT_RELAENT,
4506 sizeof (Elf32_External_Rela)))
4507 return FALSE;
4508 }
4509
4510 if (reltext)
4511 {
4512 if (! bfd_elf32_add_dynamic_entry (info, DT_TEXTREL, 0))
4513 return FALSE;
4514 }
4515 }
4516
4517 return TRUE;
4518 }
4519
4520 /* Finish up dynamic symbol handling. We set the contents of various
4521 dynamic sections here. */
4522
4523 static bfd_boolean
4524 _bfd_mn10300_elf_finish_dynamic_symbol (output_bfd, info, h, sym)
4525 bfd * output_bfd;
4526 struct bfd_link_info * info;
4527 struct elf_link_hash_entry * h;
4528 Elf_Internal_Sym * sym;
4529 {
4530 bfd * dynobj;
4531
4532 dynobj = elf_hash_table (info)->dynobj;
4533
4534 if (h->plt.offset != (bfd_vma) -1)
4535 {
4536 asection * splt;
4537 asection * sgot;
4538 asection * srel;
4539 bfd_vma plt_index;
4540 bfd_vma got_offset;
4541 Elf_Internal_Rela rel;
4542
4543 /* This symbol has an entry in the procedure linkage table. Set
4544 it up. */
4545
4546 BFD_ASSERT (h->dynindx != -1);
4547
4548 splt = bfd_get_section_by_name (dynobj, ".plt");
4549 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
4550 srel = bfd_get_section_by_name (dynobj, ".rela.plt");
4551 BFD_ASSERT (splt != NULL && sgot != NULL && srel != NULL);
4552
4553 /* Get the index in the procedure linkage table which
4554 corresponds to this symbol. This is the index of this symbol
4555 in all the symbols for which we are making plt entries. The
4556 first entry in the procedure linkage table is reserved. */
4557 plt_index = ((h->plt.offset - elf_mn10300_sizeof_plt0 (info))
4558 / elf_mn10300_sizeof_plt (info));
4559
4560 /* Get the offset into the .got table of the entry that
4561 corresponds to this function. Each .got entry is 4 bytes.
4562 The first three are reserved. */
4563 got_offset = (plt_index + 3) * 4;
4564
4565 /* Fill in the entry in the procedure linkage table. */
4566 if (! info->shared)
4567 {
4568 memcpy (splt->contents + h->plt.offset, elf_mn10300_plt_entry,
4569 elf_mn10300_sizeof_plt (info));
4570 bfd_put_32 (output_bfd,
4571 (sgot->output_section->vma
4572 + sgot->output_offset
4573 + got_offset),
4574 (splt->contents + h->plt.offset
4575 + elf_mn10300_plt_symbol_offset (info)));
4576
4577 bfd_put_32 (output_bfd,
4578 (1 - h->plt.offset - elf_mn10300_plt_plt0_offset (info)),
4579 (splt->contents + h->plt.offset
4580 + elf_mn10300_plt_plt0_offset (info)));
4581 }
4582 else
4583 {
4584 memcpy (splt->contents + h->plt.offset, elf_mn10300_pic_plt_entry,
4585 elf_mn10300_sizeof_plt (info));
4586
4587 bfd_put_32 (output_bfd, got_offset,
4588 (splt->contents + h->plt.offset
4589 + elf_mn10300_plt_symbol_offset (info)));
4590 }
4591
4592 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
4593 (splt->contents + h->plt.offset
4594 + elf_mn10300_plt_reloc_offset (info)));
4595
4596 /* Fill in the entry in the global offset table. */
4597 bfd_put_32 (output_bfd,
4598 (splt->output_section->vma
4599 + splt->output_offset
4600 + h->plt.offset
4601 + elf_mn10300_plt_temp_offset (info)),
4602 sgot->contents + got_offset);
4603
4604 /* Fill in the entry in the .rela.plt section. */
4605 rel.r_offset = (sgot->output_section->vma
4606 + sgot->output_offset
4607 + got_offset);
4608 rel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_JMP_SLOT);
4609 rel.r_addend = 0;
4610 bfd_elf32_swap_reloca_out (output_bfd, &rel,
4611 (bfd_byte *) ((Elf32_External_Rela *) srel->contents
4612 + plt_index));
4613
4614 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
4615 /* Mark the symbol as undefined, rather than as defined in
4616 the .plt section. Leave the value alone. */
4617 sym->st_shndx = SHN_UNDEF;
4618 }
4619
4620 if (h->got.offset != (bfd_vma) -1)
4621 {
4622 asection * sgot;
4623 asection * srel;
4624 Elf_Internal_Rela rel;
4625
4626 /* This symbol has an entry in the global offset table. Set it up. */
4627
4628 sgot = bfd_get_section_by_name (dynobj, ".got");
4629 srel = bfd_get_section_by_name (dynobj, ".rela.got");
4630 BFD_ASSERT (sgot != NULL && srel != NULL);
4631
4632 rel.r_offset = (sgot->output_section->vma
4633 + sgot->output_offset
4634 + (h->got.offset &~ 1));
4635
4636 /* If this is a -Bsymbolic link, and the symbol is defined
4637 locally, we just want to emit a RELATIVE reloc. Likewise if
4638 the symbol was forced to be local because of a version file.
4639 The entry in the global offset table will already have been
4640 initialized in the relocate_section function. */
4641 if (info->shared
4642 && (info->symbolic || h->dynindx == -1)
4643 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
4644 {
4645 rel.r_info = ELF32_R_INFO (0, R_MN10300_RELATIVE);
4646 rel.r_addend = (h->root.u.def.value
4647 + h->root.u.def.section->output_section->vma
4648 + h->root.u.def.section->output_offset);
4649 }
4650 else
4651 {
4652 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
4653 rel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_GLOB_DAT);
4654 rel.r_addend = 0;
4655 }
4656
4657 bfd_elf32_swap_reloca_out (output_bfd, &rel,
4658 (bfd_byte *) ((Elf32_External_Rela *) srel->contents
4659 + srel->reloc_count));
4660 ++ srel->reloc_count;
4661 }
4662
4663 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
4664 {
4665 asection * s;
4666 Elf_Internal_Rela rel;
4667
4668 /* This symbol needs a copy reloc. Set it up. */
4669 BFD_ASSERT (h->dynindx != -1
4670 && (h->root.type == bfd_link_hash_defined
4671 || h->root.type == bfd_link_hash_defweak));
4672
4673 s = bfd_get_section_by_name (h->root.u.def.section->owner,
4674 ".rela.bss");
4675 BFD_ASSERT (s != NULL);
4676
4677 rel.r_offset = (h->root.u.def.value
4678 + h->root.u.def.section->output_section->vma
4679 + h->root.u.def.section->output_offset);
4680 rel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_COPY);
4681 rel.r_addend = 0;
4682 bfd_elf32_swap_reloca_out (output_bfd, &rel,
4683 (bfd_byte *) ((Elf32_External_Rela *) s->contents
4684 + s->reloc_count));
4685 ++ s->reloc_count;
4686 }
4687
4688 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
4689 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
4690 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
4691 sym->st_shndx = SHN_ABS;
4692
4693 return TRUE;
4694 }
4695
4696 /* Finish up the dynamic sections. */
4697
4698 static bfd_boolean
4699 _bfd_mn10300_elf_finish_dynamic_sections (output_bfd, info)
4700 bfd * output_bfd;
4701 struct bfd_link_info * info;
4702 {
4703 bfd * dynobj;
4704 asection * sgot;
4705 asection * sdyn;
4706
4707 dynobj = elf_hash_table (info)->dynobj;
4708
4709 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
4710 BFD_ASSERT (sgot != NULL);
4711 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
4712
4713 if (elf_hash_table (info)->dynamic_sections_created)
4714 {
4715 asection * splt;
4716 Elf32_External_Dyn * dyncon;
4717 Elf32_External_Dyn * dynconend;
4718
4719 BFD_ASSERT (sdyn != NULL);
4720
4721 dyncon = (Elf32_External_Dyn *) sdyn->contents;
4722 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
4723
4724 for (; dyncon < dynconend; dyncon++)
4725 {
4726 Elf_Internal_Dyn dyn;
4727 const char * name;
4728 asection * s;
4729
4730 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4731
4732 switch (dyn.d_tag)
4733 {
4734 default:
4735 break;
4736
4737 case DT_PLTGOT:
4738 name = ".got";
4739 goto get_vma;
4740
4741 case DT_JMPREL:
4742 name = ".rela.plt";
4743 get_vma:
4744 s = bfd_get_section_by_name (output_bfd, name);
4745 BFD_ASSERT (s != NULL);
4746 dyn.d_un.d_ptr = s->vma;
4747 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4748 break;
4749
4750 case DT_PLTRELSZ:
4751 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
4752 BFD_ASSERT (s != NULL);
4753 if (s->_cooked_size != 0)
4754 dyn.d_un.d_val = s->_cooked_size;
4755 else
4756 dyn.d_un.d_val = s->_raw_size;
4757 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4758 break;
4759
4760 case DT_RELASZ:
4761 /* My reading of the SVR4 ABI indicates that the
4762 procedure linkage table relocs (DT_JMPREL) should be
4763 included in the overall relocs (DT_RELA). This is
4764 what Solaris does. However, UnixWare can not handle
4765 that case. Therefore, we override the DT_RELASZ entry
4766 here to make it not include the JMPREL relocs. Since
4767 the linker script arranges for .rela.plt to follow all
4768 other relocation sections, we don't have to worry
4769 about changing the DT_RELA entry. */
4770 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
4771 if (s != NULL)
4772 {
4773 if (s->_cooked_size != 0)
4774 dyn.d_un.d_val -= s->_cooked_size;
4775 else
4776 dyn.d_un.d_val -= s->_raw_size;
4777 }
4778 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4779 break;
4780 }
4781 }
4782
4783 /* Fill in the first entry in the procedure linkage table. */
4784 splt = bfd_get_section_by_name (dynobj, ".plt");
4785 if (splt && splt->_raw_size > 0)
4786 {
4787 if (info->shared)
4788 {
4789 memcpy (splt->contents, elf_mn10300_pic_plt_entry,
4790 elf_mn10300_sizeof_plt (info));
4791 }
4792 else
4793 {
4794 memcpy (splt->contents, elf_mn10300_plt0_entry, PLT0_ENTRY_SIZE);
4795 bfd_put_32 (output_bfd,
4796 sgot->output_section->vma + sgot->output_offset + 4,
4797 splt->contents + elf_mn10300_plt0_gotid_offset (info));
4798 bfd_put_32 (output_bfd,
4799 sgot->output_section->vma + sgot->output_offset + 8,
4800 splt->contents + elf_mn10300_plt0_linker_offset (info));
4801 }
4802
4803 /* UnixWare sets the entsize of .plt to 4, although that doesn't
4804 really seem like the right value. */
4805 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
4806 }
4807 }
4808
4809 /* Fill in the first three entries in the global offset table. */
4810 if (sgot->_raw_size > 0)
4811 {
4812 if (sdyn == NULL)
4813 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
4814 else
4815 bfd_put_32 (output_bfd,
4816 sdyn->output_section->vma + sdyn->output_offset,
4817 sgot->contents);
4818 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
4819 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
4820 }
4821
4822 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
4823
4824 return TRUE;
4825 }
4826
4827 #ifndef ELF_ARCH
4828 #define TARGET_LITTLE_SYM bfd_elf32_mn10300_vec
4829 #define TARGET_LITTLE_NAME "elf32-mn10300"
4830 #define ELF_ARCH bfd_arch_mn10300
4831 #define ELF_MACHINE_CODE EM_MN10300
4832 #define ELF_MACHINE_ALT1 EM_CYGNUS_MN10300
4833 #define ELF_MAXPAGESIZE 0x1000
4834 #endif
4835
4836 #define elf_info_to_howto mn10300_info_to_howto
4837 #define elf_info_to_howto_rel 0
4838 #define elf_backend_can_gc_sections 1
4839 #define elf_backend_rela_normal 1
4840 #define elf_backend_check_relocs mn10300_elf_check_relocs
4841 #define elf_backend_gc_mark_hook mn10300_elf_gc_mark_hook
4842 #define elf_backend_relocate_section mn10300_elf_relocate_section
4843 #define bfd_elf32_bfd_relax_section mn10300_elf_relax_section
4844 #define bfd_elf32_bfd_get_relocated_section_contents \
4845 mn10300_elf_get_relocated_section_contents
4846 #define bfd_elf32_bfd_link_hash_table_create \
4847 elf32_mn10300_link_hash_table_create
4848 #define bfd_elf32_bfd_link_hash_table_free \
4849 elf32_mn10300_link_hash_table_free
4850
4851 #ifndef elf_symbol_leading_char
4852 #define elf_symbol_leading_char '_'
4853 #endif
4854
4855 /* So we can set bits in e_flags. */
4856 #define elf_backend_final_write_processing \
4857 _bfd_mn10300_elf_final_write_processing
4858 #define elf_backend_object_p _bfd_mn10300_elf_object_p
4859
4860 #define bfd_elf32_bfd_merge_private_bfd_data \
4861 _bfd_mn10300_elf_merge_private_bfd_data
4862
4863 #define elf_backend_can_gc_sections 1
4864 #define elf_backend_create_dynamic_sections \
4865 _bfd_mn10300_elf_create_dynamic_sections
4866 #define elf_backend_adjust_dynamic_symbol \
4867 _bfd_mn10300_elf_adjust_dynamic_symbol
4868 #define elf_backend_size_dynamic_sections \
4869 _bfd_mn10300_elf_size_dynamic_sections
4870 #define elf_backend_finish_dynamic_symbol \
4871 _bfd_mn10300_elf_finish_dynamic_symbol
4872 #define elf_backend_finish_dynamic_sections \
4873 _bfd_mn10300_elf_finish_dynamic_sections
4874
4875 #define elf_backend_want_got_plt 1
4876 #define elf_backend_plt_readonly 1
4877 #define elf_backend_want_plt_sym 0
4878 #define elf_backend_got_header_size 12
4879
4880 #include "elf32-target.h"
GDB Binutils - Deliverables
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