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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, 2004
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 function 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_elf_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_elf_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_elf_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 elf_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 = elf_sym_hashes (input_bfd);
1548
1549 rel = relocs;
1550 relend = relocs + input_section->reloc_count;
1551 for (; rel < relend; rel++)
1552 {
1553 int r_type;
1554 reloc_howto_type *howto;
1555 unsigned long r_symndx;
1556 Elf_Internal_Sym *sym;
1557 asection *sec;
1558 struct elf32_mn10300_link_hash_entry *h;
1559 bfd_vma relocation;
1560 bfd_reloc_status_type r;
1561
1562 r_symndx = ELF32_R_SYM (rel->r_info);
1563 r_type = ELF32_R_TYPE (rel->r_info);
1564 howto = elf_mn10300_howto_table + r_type;
1565
1566 /* Just skip the vtable gc relocs. */
1567 if (r_type == R_MN10300_GNU_VTINHERIT
1568 || r_type == R_MN10300_GNU_VTENTRY)
1569 continue;
1570
1571 h = NULL;
1572 sym = NULL;
1573 sec = NULL;
1574 if (r_symndx < symtab_hdr->sh_info)
1575 {
1576 sym = local_syms + r_symndx;
1577 sec = local_sections[r_symndx];
1578 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1579 }
1580 else
1581 {
1582 bfd_boolean unresolved_reloc;
1583 bfd_boolean warned;
1584 struct elf_link_hash_entry *hh;
1585
1586 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1587 r_symndx, symtab_hdr, sym_hashes,
1588 hh, sec, relocation,
1589 unresolved_reloc, warned);
1590
1591 h = (struct elf32_mn10300_link_hash_entry *) hh;
1592
1593 if ((h->root.root.type == bfd_link_hash_defined
1594 || h->root.root.type == bfd_link_hash_defweak)
1595 && ( r_type == R_MN10300_GOTPC32
1596 || r_type == R_MN10300_GOTPC16
1597 || (( r_type == R_MN10300_PLT32
1598 || r_type == R_MN10300_PLT16)
1599 && ELF_ST_VISIBILITY (h->root.other) != STV_INTERNAL
1600 && ELF_ST_VISIBILITY (h->root.other) != STV_HIDDEN
1601 && h->root.plt.offset != (bfd_vma) -1)
1602 || (( r_type == R_MN10300_GOT32
1603 || r_type == R_MN10300_GOT24
1604 || r_type == R_MN10300_GOT16)
1605 && elf_hash_table (info)->dynamic_sections_created
1606 && (! info->shared
1607 || (! info->symbolic && h->root.dynindx != -1)
1608 || (h->root.elf_link_hash_flags
1609 & ELF_LINK_HASH_DEF_REGULAR) == 0))
1610 || (info->shared
1611 && ((! info->symbolic && h->root.dynindx != -1)
1612 || (h->root.elf_link_hash_flags
1613 & ELF_LINK_HASH_DEF_REGULAR) == 0)
1614 && ( r_type == R_MN10300_32
1615 || r_type == R_MN10300_PCREL32)
1616 && ((input_section->flags & SEC_ALLOC) != 0
1617 /* DWARF will emit R_MN10300_32 relocations
1618 in its sections against symbols defined
1619 externally in shared libraries. We can't
1620 do anything with them here. */
1621 || ((input_section->flags & SEC_DEBUGGING) != 0
1622 && (h->root.elf_link_hash_flags
1623 & ELF_LINK_HASH_DEF_DYNAMIC) != 0)))))
1624 /* In these cases, we don't need the relocation
1625 value. We check specially because in some
1626 obscure cases sec->output_section will be NULL. */
1627 relocation = 0;
1628
1629 else if (unresolved_reloc)
1630 (*_bfd_error_handler)
1631 (_("%s: warning: unresolvable relocation against symbol `%s' from %s section"),
1632 bfd_get_filename (input_bfd), h->root.root.root.string,
1633 bfd_get_section_name (input_bfd, input_section));
1634 }
1635
1636 r = mn10300_elf_final_link_relocate (howto, input_bfd, output_bfd,
1637 input_section,
1638 contents, rel->r_offset,
1639 relocation, rel->r_addend,
1640 (struct elf_link_hash_entry *)h,
1641 r_symndx,
1642 info, sec, h == NULL);
1643
1644 if (r != bfd_reloc_ok)
1645 {
1646 const char *name;
1647 const char *msg = (const char *) 0;
1648
1649 if (h != NULL)
1650 name = h->root.root.root.string;
1651 else
1652 {
1653 name = (bfd_elf_string_from_elf_section
1654 (input_bfd, symtab_hdr->sh_link, sym->st_name));
1655 if (name == NULL || *name == '\0')
1656 name = bfd_section_name (input_bfd, sec);
1657 }
1658
1659 switch (r)
1660 {
1661 case bfd_reloc_overflow:
1662 if (! ((*info->callbacks->reloc_overflow)
1663 (info, name, howto->name, (bfd_vma) 0,
1664 input_bfd, input_section, rel->r_offset)))
1665 return FALSE;
1666 break;
1667
1668 case bfd_reloc_undefined:
1669 if (! ((*info->callbacks->undefined_symbol)
1670 (info, name, input_bfd, input_section,
1671 rel->r_offset, TRUE)))
1672 return FALSE;
1673 break;
1674
1675 case bfd_reloc_outofrange:
1676 msg = _("internal error: out of range error");
1677 goto common_error;
1678
1679 case bfd_reloc_notsupported:
1680 msg = _("internal error: unsupported relocation error");
1681 goto common_error;
1682
1683 case bfd_reloc_dangerous:
1684 msg = _("internal error: dangerous error");
1685 goto common_error;
1686
1687 default:
1688 msg = _("internal error: unknown error");
1689 /* fall through */
1690
1691 common_error:
1692 if (!((*info->callbacks->warning)
1693 (info, msg, name, input_bfd, input_section,
1694 rel->r_offset)))
1695 return FALSE;
1696 break;
1697 }
1698 }
1699 }
1700
1701 return TRUE;
1702 }
1703
1704 /* Finish initializing one hash table entry. */
1705 static bfd_boolean
1706 elf32_mn10300_finish_hash_table_entry (gen_entry, in_args)
1707 struct bfd_hash_entry *gen_entry;
1708 PTR in_args;
1709 {
1710 struct elf32_mn10300_link_hash_entry *entry;
1711 struct bfd_link_info *link_info = (struct bfd_link_info *)in_args;
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,
1726 then note that all "call" instructions should be converted into
1727 "calls" instructions and return. If a symbol is available for
1728 dynamic symbol resolution (overridable or overriding), avoid
1729 custom calling conventions. */
1730 if (entry->direct_calls == 0
1731 || (entry->stack_size == 0 && entry->movm_args == 0)
1732 || (elf_hash_table (link_info)->dynamic_sections_created
1733 && ELF_ST_VISIBILITY (entry->root.other) != STV_INTERNAL
1734 && ELF_ST_VISIBILITY (entry->root.other) != STV_HIDDEN))
1735 {
1736 /* Make a note that we should convert "call" instructions to "calls"
1737 instructions for calls to this symbol. */
1738 entry->flags |= MN10300_CONVERT_CALL_TO_CALLS;
1739 return TRUE;
1740 }
1741
1742 /* We may be able to move some instructions from the function itself into
1743 the "call" instruction. Count how many bytes we might be able to
1744 eliminate in the function itself. */
1745
1746 /* A movm instruction is two bytes. */
1747 if (entry->movm_args)
1748 byte_count += 2;
1749
1750 /* Count the insn to allocate stack space too. */
1751 if (entry->stack_size > 0)
1752 {
1753 if (entry->stack_size <= 128)
1754 byte_count += 3;
1755 else
1756 byte_count += 4;
1757 }
1758
1759 /* If using "call" will result in larger code, then turn all
1760 the associated "call" instructions into "calls" instructions. */
1761 if (byte_count < entry->direct_calls)
1762 entry->flags |= MN10300_CONVERT_CALL_TO_CALLS;
1763
1764 /* This routine never fails. */
1765 return TRUE;
1766 }
1767
1768 /* This function handles relaxing for the mn10300.
1769
1770 There are quite a few relaxing opportunities available on the mn10300:
1771
1772 * calls:32 -> calls:16 2 bytes
1773 * call:32 -> call:16 2 bytes
1774
1775 * call:32 -> calls:32 1 byte
1776 * call:16 -> calls:16 1 byte
1777 * These are done anytime using "calls" would result
1778 in smaller code, or when necessary to preserve the
1779 meaning of the program.
1780
1781 * call:32 varies
1782 * call:16
1783 * In some circumstances we can move instructions
1784 from a function prologue into a "call" instruction.
1785 This is only done if the resulting code is no larger
1786 than the original code.
1787
1788 * jmp:32 -> jmp:16 2 bytes
1789 * jmp:16 -> bra:8 1 byte
1790
1791 * If the previous instruction is a conditional branch
1792 around the jump/bra, we may be able to reverse its condition
1793 and change its target to the jump's target. The jump/bra
1794 can then be deleted. 2 bytes
1795
1796 * mov abs32 -> mov abs16 1 or 2 bytes
1797
1798 * Most instructions which accept imm32 can relax to imm16 1 or 2 bytes
1799 - Most instructions which accept imm16 can relax to imm8 1 or 2 bytes
1800
1801 * Most instructions which accept d32 can relax to d16 1 or 2 bytes
1802 - Most instructions which accept d16 can relax to d8 1 or 2 bytes
1803
1804 We don't handle imm16->imm8 or d16->d8 as they're very rare
1805 and somewhat more difficult to support. */
1806
1807 static bfd_boolean
1808 mn10300_elf_relax_section (abfd, sec, link_info, again)
1809 bfd *abfd;
1810 asection *sec;
1811 struct bfd_link_info *link_info;
1812 bfd_boolean *again;
1813 {
1814 Elf_Internal_Shdr *symtab_hdr;
1815 Elf_Internal_Rela *internal_relocs = NULL;
1816 Elf_Internal_Rela *irel, *irelend;
1817 bfd_byte *contents = NULL;
1818 Elf_Internal_Sym *isymbuf = NULL;
1819 struct elf32_mn10300_link_hash_table *hash_table;
1820 asection *section = sec;
1821
1822 /* Assume nothing changes. */
1823 *again = FALSE;
1824
1825 /* We need a pointer to the mn10300 specific hash table. */
1826 hash_table = elf32_mn10300_hash_table (link_info);
1827
1828 /* Initialize fields in each hash table entry the first time through. */
1829 if ((hash_table->flags & MN10300_HASH_ENTRIES_INITIALIZED) == 0)
1830 {
1831 bfd *input_bfd;
1832
1833 /* Iterate over all the input bfds. */
1834 for (input_bfd = link_info->input_bfds;
1835 input_bfd != NULL;
1836 input_bfd = input_bfd->link_next)
1837 {
1838 /* We're going to need all the symbols for each bfd. */
1839 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1840 if (symtab_hdr->sh_info != 0)
1841 {
1842 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1843 if (isymbuf == NULL)
1844 isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
1845 symtab_hdr->sh_info, 0,
1846 NULL, NULL, NULL);
1847 if (isymbuf == NULL)
1848 goto error_return;
1849 }
1850
1851 /* Iterate over each section in this bfd. */
1852 for (section = input_bfd->sections;
1853 section != NULL;
1854 section = section->next)
1855 {
1856 struct elf32_mn10300_link_hash_entry *hash;
1857 Elf_Internal_Sym *sym;
1858 asection *sym_sec = NULL;
1859 const char *sym_name;
1860 char *new_name;
1861
1862 /* If there's nothing to do in this section, skip it. */
1863 if (! (((section->flags & SEC_RELOC) != 0
1864 && section->reloc_count != 0)
1865 || (section->flags & SEC_CODE) != 0))
1866 continue;
1867
1868 /* Get cached copy of section contents if it exists. */
1869 if (elf_section_data (section)->this_hdr.contents != NULL)
1870 contents = elf_section_data (section)->this_hdr.contents;
1871 else if (section->_raw_size != 0)
1872 {
1873 /* Go get them off disk. */
1874 contents = (bfd_byte *) bfd_malloc (section->_raw_size);
1875 if (contents == NULL)
1876 goto error_return;
1877
1878 if (!bfd_get_section_contents (input_bfd, section,
1879 contents, (file_ptr) 0,
1880 section->_raw_size))
1881 goto error_return;
1882 }
1883 else
1884 contents = NULL;
1885
1886 /* If there aren't any relocs, then there's nothing to do. */
1887 if ((section->flags & SEC_RELOC) != 0
1888 && section->reloc_count != 0)
1889 {
1890
1891 /* Get a copy of the native relocations. */
1892 internal_relocs = (_bfd_elf_link_read_relocs
1893 (input_bfd, section, (PTR) NULL,
1894 (Elf_Internal_Rela *) NULL,
1895 link_info->keep_memory));
1896 if (internal_relocs == NULL)
1897 goto error_return;
1898
1899 /* Now examine each relocation. */
1900 irel = internal_relocs;
1901 irelend = irel + section->reloc_count;
1902 for (; irel < irelend; irel++)
1903 {
1904 long r_type;
1905 unsigned long r_index;
1906 unsigned char code;
1907
1908 r_type = ELF32_R_TYPE (irel->r_info);
1909 r_index = ELF32_R_SYM (irel->r_info);
1910
1911 if (r_type < 0 || r_type >= (int) R_MN10300_MAX)
1912 goto error_return;
1913
1914 /* We need the name and hash table entry of the target
1915 symbol! */
1916 hash = NULL;
1917 sym = NULL;
1918 sym_sec = NULL;
1919
1920 if (r_index < symtab_hdr->sh_info)
1921 {
1922 /* A local symbol. */
1923 Elf_Internal_Sym *isym;
1924 struct elf_link_hash_table *elftab;
1925 bfd_size_type amt;
1926
1927 isym = isymbuf + r_index;
1928 if (isym->st_shndx == SHN_UNDEF)
1929 sym_sec = bfd_und_section_ptr;
1930 else if (isym->st_shndx == SHN_ABS)
1931 sym_sec = bfd_abs_section_ptr;
1932 else if (isym->st_shndx == SHN_COMMON)
1933 sym_sec = bfd_com_section_ptr;
1934 else
1935 sym_sec
1936 = bfd_section_from_elf_index (input_bfd,
1937 isym->st_shndx);
1938
1939 sym_name
1940 = bfd_elf_string_from_elf_section (input_bfd,
1941 (symtab_hdr
1942 ->sh_link),
1943 isym->st_name);
1944
1945 /* If it isn't a function, then we don't care
1946 about it. */
1947 if (ELF_ST_TYPE (isym->st_info) != STT_FUNC)
1948 continue;
1949
1950 /* Tack on an ID so we can uniquely identify this
1951 local symbol in the global hash table. */
1952 amt = strlen (sym_name) + 10;
1953 new_name = bfd_malloc (amt);
1954 if (new_name == 0)
1955 goto error_return;
1956
1957 sprintf (new_name, "%s_%08x",
1958 sym_name, (int) sym_sec);
1959 sym_name = new_name;
1960
1961 elftab = &hash_table->static_hash_table->root;
1962 hash = ((struct elf32_mn10300_link_hash_entry *)
1963 elf_link_hash_lookup (elftab, sym_name,
1964 TRUE, TRUE, FALSE));
1965 free (new_name);
1966 }
1967 else
1968 {
1969 r_index -= symtab_hdr->sh_info;
1970 hash = (struct elf32_mn10300_link_hash_entry *)
1971 elf_sym_hashes (input_bfd)[r_index];
1972 }
1973
1974 /* If this is not a "call" instruction, then we
1975 should convert "call" instructions to "calls"
1976 instructions. */
1977 code = bfd_get_8 (input_bfd,
1978 contents + irel->r_offset - 1);
1979 if (code != 0xdd && code != 0xcd)
1980 hash->flags |= MN10300_CONVERT_CALL_TO_CALLS;
1981
1982 /* If this is a jump/call, then bump the
1983 direct_calls counter. Else force "call" to
1984 "calls" conversions. */
1985 if (r_type == R_MN10300_PCREL32
1986 || r_type == R_MN10300_PLT32
1987 || r_type == R_MN10300_PLT16
1988 || r_type == R_MN10300_PCREL16)
1989 hash->direct_calls++;
1990 else
1991 hash->flags |= MN10300_CONVERT_CALL_TO_CALLS;
1992 }
1993 }
1994
1995 /* Now look at the actual contents to get the stack size,
1996 and a list of what registers were saved in the prologue
1997 (ie movm_args). */
1998 if ((section->flags & SEC_CODE) != 0)
1999 {
2000 Elf_Internal_Sym *isym, *isymend;
2001 unsigned int sec_shndx;
2002 struct elf_link_hash_entry **hashes;
2003 struct elf_link_hash_entry **end_hashes;
2004 unsigned int symcount;
2005
2006 sec_shndx = _bfd_elf_section_from_bfd_section (input_bfd,
2007 section);
2008
2009 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
2010 - symtab_hdr->sh_info);
2011 hashes = elf_sym_hashes (input_bfd);
2012 end_hashes = hashes + symcount;
2013
2014 /* Look at each function defined in this section and
2015 update info for that function. */
2016 isymend = isymbuf + symtab_hdr->sh_info;
2017 for (isym = isymbuf; isym < isymend; isym++)
2018 {
2019 if (isym->st_shndx == sec_shndx
2020 && ELF_ST_TYPE (isym->st_info) == STT_FUNC)
2021 {
2022 struct elf_link_hash_table *elftab;
2023 bfd_size_type amt;
2024 struct elf_link_hash_entry **lhashes = hashes;
2025
2026 /* Skip a local symbol if it aliases a
2027 global one. */
2028 for (; lhashes < end_hashes; lhashes++)
2029 {
2030 hash = (struct elf32_mn10300_link_hash_entry *) *lhashes;
2031 if ((hash->root.root.type == bfd_link_hash_defined
2032 || hash->root.root.type == bfd_link_hash_defweak)
2033 && hash->root.root.u.def.section == section
2034 && hash->root.type == STT_FUNC
2035 && hash->root.root.u.def.value == isym->st_value)
2036 break;
2037 }
2038 if (lhashes != end_hashes)
2039 continue;
2040
2041 if (isym->st_shndx == SHN_UNDEF)
2042 sym_sec = bfd_und_section_ptr;
2043 else if (isym->st_shndx == SHN_ABS)
2044 sym_sec = bfd_abs_section_ptr;
2045 else if (isym->st_shndx == SHN_COMMON)
2046 sym_sec = bfd_com_section_ptr;
2047 else
2048 sym_sec
2049 = bfd_section_from_elf_index (input_bfd,
2050 isym->st_shndx);
2051
2052 sym_name = (bfd_elf_string_from_elf_section
2053 (input_bfd, symtab_hdr->sh_link,
2054 isym->st_name));
2055
2056 /* Tack on an ID so we can uniquely identify this
2057 local symbol in the global hash table. */
2058 amt = strlen (sym_name) + 10;
2059 new_name = bfd_malloc (amt);
2060 if (new_name == 0)
2061 goto error_return;
2062
2063 sprintf (new_name, "%s_%08x",
2064 sym_name, (int) sym_sec);
2065 sym_name = new_name;
2066
2067 elftab = &hash_table->static_hash_table->root;
2068 hash = ((struct elf32_mn10300_link_hash_entry *)
2069 elf_link_hash_lookup (elftab, sym_name,
2070 TRUE, TRUE, FALSE));
2071 free (new_name);
2072 compute_function_info (input_bfd, hash,
2073 isym->st_value, contents);
2074 }
2075 }
2076
2077 for (; hashes < end_hashes; hashes++)
2078 {
2079 hash = (struct elf32_mn10300_link_hash_entry *) *hashes;
2080 if ((hash->root.root.type == bfd_link_hash_defined
2081 || hash->root.root.type == bfd_link_hash_defweak)
2082 && hash->root.root.u.def.section == section
2083 && hash->root.type == STT_FUNC)
2084 compute_function_info (input_bfd, hash,
2085 (hash)->root.root.u.def.value,
2086 contents);
2087 }
2088 }
2089
2090 /* Cache or free any memory we allocated for the relocs. */
2091 if (internal_relocs != NULL
2092 && elf_section_data (section)->relocs != internal_relocs)
2093 free (internal_relocs);
2094 internal_relocs = NULL;
2095
2096 /* Cache or free any memory we allocated for the contents. */
2097 if (contents != NULL
2098 && elf_section_data (section)->this_hdr.contents != contents)
2099 {
2100 if (! link_info->keep_memory)
2101 free (contents);
2102 else
2103 {
2104 /* Cache the section contents for elf_link_input_bfd. */
2105 elf_section_data (section)->this_hdr.contents = contents;
2106 }
2107 }
2108 contents = NULL;
2109 }
2110
2111 /* Cache or free any memory we allocated for the symbols. */
2112 if (isymbuf != NULL
2113 && symtab_hdr->contents != (unsigned char *) isymbuf)
2114 {
2115 if (! link_info->keep_memory)
2116 free (isymbuf);
2117 else
2118 {
2119 /* Cache the symbols for elf_link_input_bfd. */
2120 symtab_hdr->contents = (unsigned char *) isymbuf;
2121 }
2122 }
2123 isymbuf = NULL;
2124 }
2125
2126 /* Now iterate on each symbol in the hash table and perform
2127 the final initialization steps on each. */
2128 elf32_mn10300_link_hash_traverse (hash_table,
2129 elf32_mn10300_finish_hash_table_entry,
2130 link_info);
2131 elf32_mn10300_link_hash_traverse (hash_table->static_hash_table,
2132 elf32_mn10300_finish_hash_table_entry,
2133 link_info);
2134
2135 /* All entries in the hash table are fully initialized. */
2136 hash_table->flags |= MN10300_HASH_ENTRIES_INITIALIZED;
2137
2138 /* Now that everything has been initialized, go through each
2139 code section and delete any prologue insns which will be
2140 redundant because their operations will be performed by
2141 a "call" instruction. */
2142 for (input_bfd = link_info->input_bfds;
2143 input_bfd != NULL;
2144 input_bfd = input_bfd->link_next)
2145 {
2146 /* We're going to need all the local symbols for each bfd. */
2147 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2148 if (symtab_hdr->sh_info != 0)
2149 {
2150 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
2151 if (isymbuf == NULL)
2152 isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
2153 symtab_hdr->sh_info, 0,
2154 NULL, NULL, NULL);
2155 if (isymbuf == NULL)
2156 goto error_return;
2157 }
2158
2159 /* Walk over each section in this bfd. */
2160 for (section = input_bfd->sections;
2161 section != NULL;
2162 section = section->next)
2163 {
2164 unsigned int sec_shndx;
2165 Elf_Internal_Sym *isym, *isymend;
2166 struct elf_link_hash_entry **hashes;
2167 struct elf_link_hash_entry **end_hashes;
2168 unsigned int symcount;
2169
2170 /* Skip non-code sections and empty sections. */
2171 if ((section->flags & SEC_CODE) == 0 || section->_raw_size == 0)
2172 continue;
2173
2174 if (section->reloc_count != 0)
2175 {
2176 /* Get a copy of the native relocations. */
2177 internal_relocs = (_bfd_elf_link_read_relocs
2178 (input_bfd, section, (PTR) NULL,
2179 (Elf_Internal_Rela *) NULL,
2180 link_info->keep_memory));
2181 if (internal_relocs == NULL)
2182 goto error_return;
2183 }
2184
2185 /* Get cached copy of section contents if it exists. */
2186 if (elf_section_data (section)->this_hdr.contents != NULL)
2187 contents = elf_section_data (section)->this_hdr.contents;
2188 else
2189 {
2190 /* Go get them off disk. */
2191 contents = (bfd_byte *) bfd_malloc (section->_raw_size);
2192 if (contents == NULL)
2193 goto error_return;
2194
2195 if (!bfd_get_section_contents (input_bfd, section,
2196 contents, (file_ptr) 0,
2197 section->_raw_size))
2198 goto error_return;
2199 }
2200
2201 sec_shndx = _bfd_elf_section_from_bfd_section (input_bfd,
2202 section);
2203
2204 /* Now look for any function in this section which needs
2205 insns deleted from its prologue. */
2206 isymend = isymbuf + symtab_hdr->sh_info;
2207 for (isym = isymbuf; isym < isymend; isym++)
2208 {
2209 struct elf32_mn10300_link_hash_entry *sym_hash;
2210 asection *sym_sec = NULL;
2211 const char *sym_name;
2212 char *new_name;
2213 struct elf_link_hash_table *elftab;
2214 bfd_size_type amt;
2215
2216 if (isym->st_shndx != sec_shndx)
2217 continue;
2218
2219 if (isym->st_shndx == SHN_UNDEF)
2220 sym_sec = bfd_und_section_ptr;
2221 else if (isym->st_shndx == SHN_ABS)
2222 sym_sec = bfd_abs_section_ptr;
2223 else if (isym->st_shndx == SHN_COMMON)
2224 sym_sec = bfd_com_section_ptr;
2225 else
2226 sym_sec
2227 = bfd_section_from_elf_index (input_bfd, isym->st_shndx);
2228
2229 sym_name
2230 = bfd_elf_string_from_elf_section (input_bfd,
2231 symtab_hdr->sh_link,
2232 isym->st_name);
2233
2234 /* Tack on an ID so we can uniquely identify this
2235 local symbol in the global hash table. */
2236 amt = strlen (sym_name) + 10;
2237 new_name = bfd_malloc (amt);
2238 if (new_name == 0)
2239 goto error_return;
2240 sprintf (new_name, "%s_%08x", sym_name, (int) sym_sec);
2241 sym_name = new_name;
2242
2243 elftab = &hash_table->static_hash_table->root;
2244 sym_hash = ((struct elf32_mn10300_link_hash_entry *)
2245 elf_link_hash_lookup (elftab, sym_name,
2246 FALSE, FALSE, FALSE));
2247
2248 free (new_name);
2249 if (sym_hash == NULL)
2250 continue;
2251
2252 if (! (sym_hash->flags & MN10300_CONVERT_CALL_TO_CALLS)
2253 && ! (sym_hash->flags & MN10300_DELETED_PROLOGUE_BYTES))
2254 {
2255 int bytes = 0;
2256
2257 /* Note that we've changed things. */
2258 elf_section_data (section)->relocs = internal_relocs;
2259 elf_section_data (section)->this_hdr.contents = contents;
2260 symtab_hdr->contents = (unsigned char *) isymbuf;
2261
2262 /* Count how many bytes we're going to delete. */
2263 if (sym_hash->movm_args)
2264 bytes += 2;
2265
2266 if (sym_hash->stack_size > 0)
2267 {
2268 if (sym_hash->stack_size <= 128)
2269 bytes += 3;
2270 else
2271 bytes += 4;
2272 }
2273
2274 /* Note that we've deleted prologue bytes for this
2275 function. */
2276 sym_hash->flags |= MN10300_DELETED_PROLOGUE_BYTES;
2277
2278 /* Actually delete the bytes. */
2279 if (!mn10300_elf_relax_delete_bytes (input_bfd,
2280 section,
2281 isym->st_value,
2282 bytes))
2283 goto error_return;
2284
2285 /* Something changed. Not strictly necessary, but
2286 may lead to more relaxing opportunities. */
2287 *again = TRUE;
2288 }
2289 }
2290
2291 /* Look for any global functions in this section which
2292 need insns deleted from their prologues. */
2293 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
2294 - symtab_hdr->sh_info);
2295 hashes = elf_sym_hashes (input_bfd);
2296 end_hashes = hashes + symcount;
2297 for (; hashes < end_hashes; hashes++)
2298 {
2299 struct elf32_mn10300_link_hash_entry *sym_hash;
2300
2301 sym_hash = (struct elf32_mn10300_link_hash_entry *) *hashes;
2302 if ((sym_hash->root.root.type == bfd_link_hash_defined
2303 || sym_hash->root.root.type == bfd_link_hash_defweak)
2304 && sym_hash->root.root.u.def.section == section
2305 && ! (sym_hash->flags & MN10300_CONVERT_CALL_TO_CALLS)
2306 && ! (sym_hash->flags & MN10300_DELETED_PROLOGUE_BYTES))
2307 {
2308 int bytes = 0;
2309 bfd_vma symval;
2310
2311 /* Note that we've changed things. */
2312 elf_section_data (section)->relocs = internal_relocs;
2313 elf_section_data (section)->this_hdr.contents = contents;
2314 symtab_hdr->contents = (unsigned char *) isymbuf;
2315
2316 /* Count how many bytes we're going to delete. */
2317 if (sym_hash->movm_args)
2318 bytes += 2;
2319
2320 if (sym_hash->stack_size > 0)
2321 {
2322 if (sym_hash->stack_size <= 128)
2323 bytes += 3;
2324 else
2325 bytes += 4;
2326 }
2327
2328 /* Note that we've deleted prologue bytes for this
2329 function. */
2330 sym_hash->flags |= MN10300_DELETED_PROLOGUE_BYTES;
2331
2332 /* Actually delete the bytes. */
2333 symval = sym_hash->root.root.u.def.value;
2334 if (!mn10300_elf_relax_delete_bytes (input_bfd,
2335 section,
2336 symval,
2337 bytes))
2338 goto error_return;
2339
2340 /* Something changed. Not strictly necessary, but
2341 may lead to more relaxing opportunities. */
2342 *again = TRUE;
2343 }
2344 }
2345
2346 /* Cache or free any memory we allocated for the relocs. */
2347 if (internal_relocs != NULL
2348 && elf_section_data (section)->relocs != internal_relocs)
2349 free (internal_relocs);
2350 internal_relocs = NULL;
2351
2352 /* Cache or free any memory we allocated for the contents. */
2353 if (contents != NULL
2354 && elf_section_data (section)->this_hdr.contents != contents)
2355 {
2356 if (! link_info->keep_memory)
2357 free (contents);
2358 else
2359 {
2360 /* Cache the section contents for elf_link_input_bfd. */
2361 elf_section_data (section)->this_hdr.contents = contents;
2362 }
2363 }
2364 contents = NULL;
2365 }
2366
2367 /* Cache or free any memory we allocated for the symbols. */
2368 if (isymbuf != NULL
2369 && symtab_hdr->contents != (unsigned char *) isymbuf)
2370 {
2371 if (! link_info->keep_memory)
2372 free (isymbuf);
2373 else
2374 {
2375 /* Cache the symbols for elf_link_input_bfd. */
2376 symtab_hdr->contents = (unsigned char *) isymbuf;
2377 }
2378 }
2379 isymbuf = NULL;
2380 }
2381 }
2382
2383 /* (Re)initialize for the basic instruction shortening/relaxing pass. */
2384 contents = NULL;
2385 internal_relocs = NULL;
2386 isymbuf = NULL;
2387 /* For error_return. */
2388 section = sec;
2389
2390 /* We don't have to do anything for a relocatable link, if
2391 this section does not have relocs, or if this is not a
2392 code section. */
2393 if (link_info->relocatable
2394 || (sec->flags & SEC_RELOC) == 0
2395 || sec->reloc_count == 0
2396 || (sec->flags & SEC_CODE) == 0)
2397 return TRUE;
2398
2399 /* If this is the first time we have been called for this section,
2400 initialize the cooked size. */
2401 if (sec->_cooked_size == 0)
2402 sec->_cooked_size = sec->_raw_size;
2403
2404 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2405
2406 /* Get a copy of the native relocations. */
2407 internal_relocs = (_bfd_elf_link_read_relocs
2408 (abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
2409 link_info->keep_memory));
2410 if (internal_relocs == NULL)
2411 goto error_return;
2412
2413 /* Walk through them looking for relaxing opportunities. */
2414 irelend = internal_relocs + sec->reloc_count;
2415 for (irel = internal_relocs; irel < irelend; irel++)
2416 {
2417 bfd_vma symval;
2418 struct elf32_mn10300_link_hash_entry *h = NULL;
2419
2420 /* If this isn't something that can be relaxed, then ignore
2421 this reloc. */
2422 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_NONE
2423 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_8
2424 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_MAX)
2425 continue;
2426
2427 /* Get the section contents if we haven't done so already. */
2428 if (contents == NULL)
2429 {
2430 /* Get cached copy if it exists. */
2431 if (elf_section_data (sec)->this_hdr.contents != NULL)
2432 contents = elf_section_data (sec)->this_hdr.contents;
2433 else
2434 {
2435 /* Go get them off disk. */
2436 contents = (bfd_byte *) bfd_malloc (sec->_raw_size);
2437 if (contents == NULL)
2438 goto error_return;
2439
2440 if (! bfd_get_section_contents (abfd, sec, contents,
2441 (file_ptr) 0, sec->_raw_size))
2442 goto error_return;
2443 }
2444 }
2445
2446 /* Read this BFD's symbols if we haven't done so already. */
2447 if (isymbuf == NULL && symtab_hdr->sh_info != 0)
2448 {
2449 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
2450 if (isymbuf == NULL)
2451 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
2452 symtab_hdr->sh_info, 0,
2453 NULL, NULL, NULL);
2454 if (isymbuf == NULL)
2455 goto error_return;
2456 }
2457
2458 /* Get the value of the symbol referred to by the reloc. */
2459 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
2460 {
2461 Elf_Internal_Sym *isym;
2462 asection *sym_sec = NULL;
2463 const char *sym_name;
2464 char *new_name;
2465 bfd_vma saved_addend;
2466
2467 /* A local symbol. */
2468 isym = isymbuf + ELF32_R_SYM (irel->r_info);
2469 if (isym->st_shndx == SHN_UNDEF)
2470 sym_sec = bfd_und_section_ptr;
2471 else if (isym->st_shndx == SHN_ABS)
2472 sym_sec = bfd_abs_section_ptr;
2473 else if (isym->st_shndx == SHN_COMMON)
2474 sym_sec = bfd_com_section_ptr;
2475 else
2476 sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
2477
2478 sym_name = bfd_elf_string_from_elf_section (abfd,
2479 symtab_hdr->sh_link,
2480 isym->st_name);
2481
2482 if ((sym_sec->flags & SEC_MERGE)
2483 && ELF_ST_TYPE (isym->st_info) == STT_SECTION
2484 && sym_sec->sec_info_type == ELF_INFO_TYPE_MERGE)
2485 {
2486 saved_addend = irel->r_addend;
2487 symval = _bfd_elf_rela_local_sym (abfd, isym, &sym_sec, irel);
2488 symval += irel->r_addend;
2489 irel->r_addend = saved_addend;
2490 }
2491 else
2492 {
2493 symval = (isym->st_value
2494 + sym_sec->output_section->vma
2495 + sym_sec->output_offset);
2496 }
2497 /* Tack on an ID so we can uniquely identify this
2498 local symbol in the global hash table. */
2499 new_name = bfd_malloc ((bfd_size_type) strlen (sym_name) + 10);
2500 if (new_name == 0)
2501 goto error_return;
2502 sprintf (new_name, "%s_%08x", sym_name, (int) sym_sec);
2503 sym_name = new_name;
2504
2505 h = (struct elf32_mn10300_link_hash_entry *)
2506 elf_link_hash_lookup (&hash_table->static_hash_table->root,
2507 sym_name, FALSE, FALSE, FALSE);
2508 free (new_name);
2509 }
2510 else
2511 {
2512 unsigned long indx;
2513
2514 /* An external symbol. */
2515 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
2516 h = (struct elf32_mn10300_link_hash_entry *)
2517 (elf_sym_hashes (abfd)[indx]);
2518 BFD_ASSERT (h != NULL);
2519 if (h->root.root.type != bfd_link_hash_defined
2520 && h->root.root.type != bfd_link_hash_defweak)
2521 {
2522 /* This appears to be a reference to an undefined
2523 symbol. Just ignore it--it will be caught by the
2524 regular reloc processing. */
2525 continue;
2526 }
2527
2528 symval = (h->root.root.u.def.value
2529 + h->root.root.u.def.section->output_section->vma
2530 + h->root.root.u.def.section->output_offset);
2531 }
2532
2533 /* For simplicity of coding, we are going to modify the section
2534 contents, the section relocs, and the BFD symbol table. We
2535 must tell the rest of the code not to free up this
2536 information. It would be possible to instead create a table
2537 of changes which have to be made, as is done in coff-mips.c;
2538 that would be more work, but would require less memory when
2539 the linker is run. */
2540
2541 /* Try to turn a 32bit pc-relative branch/call into a 16bit pc-relative
2542 branch/call, also deal with "call" -> "calls" conversions and
2543 insertion of prologue data into "call" instructions. */
2544 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL32
2545 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PLT32)
2546 {
2547 bfd_vma value = symval;
2548
2549 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PLT32
2550 && h != NULL
2551 && ELF_ST_VISIBILITY (h->root.other) != STV_INTERNAL
2552 && ELF_ST_VISIBILITY (h->root.other) != STV_HIDDEN
2553 && h->root.plt.offset != (bfd_vma) -1)
2554 {
2555 asection * splt;
2556
2557 splt = bfd_get_section_by_name (elf_hash_table (link_info)
2558 ->dynobj, ".plt");
2559
2560 value = ((splt->output_section->vma
2561 + splt->output_offset
2562 + h->root.plt.offset)
2563 - (sec->output_section->vma
2564 + sec->output_offset
2565 + irel->r_offset));
2566 }
2567
2568 /* If we've got a "call" instruction that needs to be turned
2569 into a "calls" instruction, do so now. It saves a byte. */
2570 if (h && (h->flags & MN10300_CONVERT_CALL_TO_CALLS))
2571 {
2572 unsigned char code;
2573
2574 /* Get the opcode. */
2575 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2576
2577 /* Make sure we're working with a "call" instruction! */
2578 if (code == 0xdd)
2579 {
2580 /* Note that we've changed the relocs, section contents,
2581 etc. */
2582 elf_section_data (sec)->relocs = internal_relocs;
2583 elf_section_data (sec)->this_hdr.contents = contents;
2584 symtab_hdr->contents = (unsigned char *) isymbuf;
2585
2586 /* Fix the opcode. */
2587 bfd_put_8 (abfd, 0xfc, contents + irel->r_offset - 1);
2588 bfd_put_8 (abfd, 0xff, contents + irel->r_offset);
2589
2590 /* Fix irel->r_offset and irel->r_addend. */
2591 irel->r_offset += 1;
2592 irel->r_addend += 1;
2593
2594 /* Delete one byte of data. */
2595 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2596 irel->r_offset + 3, 1))
2597 goto error_return;
2598
2599 /* That will change things, so, we should relax again.
2600 Note that this is not required, and it may be slow. */
2601 *again = TRUE;
2602 }
2603 }
2604 else if (h)
2605 {
2606 /* We've got a "call" instruction which needs some data
2607 from target function filled in. */
2608 unsigned char code;
2609
2610 /* Get the opcode. */
2611 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2612
2613 /* Insert data from the target function into the "call"
2614 instruction if needed. */
2615 if (code == 0xdd)
2616 {
2617 bfd_put_8 (abfd, h->movm_args, contents + irel->r_offset + 4);
2618 bfd_put_8 (abfd, h->stack_size + h->movm_stack_size,
2619 contents + irel->r_offset + 5);
2620 }
2621 }
2622
2623 /* Deal with pc-relative gunk. */
2624 value -= (sec->output_section->vma + sec->output_offset);
2625 value -= irel->r_offset;
2626 value += irel->r_addend;
2627
2628 /* See if the value will fit in 16 bits, note the high value is
2629 0x7fff + 2 as the target will be two bytes closer if we are
2630 able to relax. */
2631 if ((long) value < 0x8001 && (long) value > -0x8000)
2632 {
2633 unsigned char code;
2634
2635 /* Get the opcode. */
2636 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2637
2638 if (code != 0xdc && code != 0xdd && code != 0xff)
2639 continue;
2640
2641 /* Note that we've changed the relocs, section contents, etc. */
2642 elf_section_data (sec)->relocs = internal_relocs;
2643 elf_section_data (sec)->this_hdr.contents = contents;
2644 symtab_hdr->contents = (unsigned char *) isymbuf;
2645
2646 /* Fix the opcode. */
2647 if (code == 0xdc)
2648 bfd_put_8 (abfd, 0xcc, contents + irel->r_offset - 1);
2649 else if (code == 0xdd)
2650 bfd_put_8 (abfd, 0xcd, contents + irel->r_offset - 1);
2651 else if (code == 0xff)
2652 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
2653
2654 /* Fix the relocation's type. */
2655 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2656 (ELF32_R_TYPE (irel->r_info)
2657 == (int) R_MN10300_PLT32)
2658 ? R_MN10300_PLT16 :
2659 R_MN10300_PCREL16);
2660
2661 /* Delete two bytes of data. */
2662 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2663 irel->r_offset + 1, 2))
2664 goto error_return;
2665
2666 /* That will change things, so, we should relax again.
2667 Note that this is not required, and it may be slow. */
2668 *again = TRUE;
2669 }
2670 }
2671
2672 /* Try to turn a 16bit pc-relative branch into a 8bit pc-relative
2673 branch. */
2674 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL16)
2675 {
2676 bfd_vma value = symval;
2677
2678 /* If we've got a "call" instruction that needs to be turned
2679 into a "calls" instruction, do so now. It saves a byte. */
2680 if (h && (h->flags & MN10300_CONVERT_CALL_TO_CALLS))
2681 {
2682 unsigned char code;
2683
2684 /* Get the opcode. */
2685 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2686
2687 /* Make sure we're working with a "call" instruction! */
2688 if (code == 0xcd)
2689 {
2690 /* Note that we've changed the relocs, section contents,
2691 etc. */
2692 elf_section_data (sec)->relocs = internal_relocs;
2693 elf_section_data (sec)->this_hdr.contents = contents;
2694 symtab_hdr->contents = (unsigned char *) isymbuf;
2695
2696 /* Fix the opcode. */
2697 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 1);
2698 bfd_put_8 (abfd, 0xff, contents + irel->r_offset);
2699
2700 /* Fix irel->r_offset and irel->r_addend. */
2701 irel->r_offset += 1;
2702 irel->r_addend += 1;
2703
2704 /* Delete one byte of data. */
2705 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2706 irel->r_offset + 1, 1))
2707 goto error_return;
2708
2709 /* That will change things, so, we should relax again.
2710 Note that this is not required, and it may be slow. */
2711 *again = TRUE;
2712 }
2713 }
2714 else if (h)
2715 {
2716 unsigned char code;
2717
2718 /* Get the opcode. */
2719 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2720
2721 /* Insert data from the target function into the "call"
2722 instruction if needed. */
2723 if (code == 0xcd)
2724 {
2725 bfd_put_8 (abfd, h->movm_args, contents + irel->r_offset + 2);
2726 bfd_put_8 (abfd, h->stack_size + h->movm_stack_size,
2727 contents + irel->r_offset + 3);
2728 }
2729 }
2730
2731 /* Deal with pc-relative gunk. */
2732 value -= (sec->output_section->vma + sec->output_offset);
2733 value -= irel->r_offset;
2734 value += irel->r_addend;
2735
2736 /* See if the value will fit in 8 bits, note the high value is
2737 0x7f + 1 as the target will be one bytes closer if we are
2738 able to relax. */
2739 if ((long) value < 0x80 && (long) value > -0x80)
2740 {
2741 unsigned char code;
2742
2743 /* Get the opcode. */
2744 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2745
2746 if (code != 0xcc)
2747 continue;
2748
2749 /* Note that we've changed the relocs, section contents, etc. */
2750 elf_section_data (sec)->relocs = internal_relocs;
2751 elf_section_data (sec)->this_hdr.contents = contents;
2752 symtab_hdr->contents = (unsigned char *) isymbuf;
2753
2754 /* Fix the opcode. */
2755 bfd_put_8 (abfd, 0xca, contents + irel->r_offset - 1);
2756
2757 /* Fix the relocation's type. */
2758 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2759 R_MN10300_PCREL8);
2760
2761 /* Delete one byte of data. */
2762 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2763 irel->r_offset + 1, 1))
2764 goto error_return;
2765
2766 /* That will change things, so, we should relax again.
2767 Note that this is not required, and it may be slow. */
2768 *again = TRUE;
2769 }
2770 }
2771
2772 /* Try to eliminate an unconditional 8 bit pc-relative branch
2773 which immediately follows a conditional 8 bit pc-relative
2774 branch around the unconditional branch.
2775
2776 original: new:
2777 bCC lab1 bCC' lab2
2778 bra lab2
2779 lab1: lab1:
2780
2781 This happens when the bCC can't reach lab2 at assembly time,
2782 but due to other relaxations it can reach at link time. */
2783 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL8)
2784 {
2785 Elf_Internal_Rela *nrel;
2786 bfd_vma value = symval;
2787 unsigned char code;
2788
2789 /* Deal with pc-relative gunk. */
2790 value -= (sec->output_section->vma + sec->output_offset);
2791 value -= irel->r_offset;
2792 value += irel->r_addend;
2793
2794 /* Do nothing if this reloc is the last byte in the section. */
2795 if (irel->r_offset == sec->_cooked_size)
2796 continue;
2797
2798 /* See if the next instruction is an unconditional pc-relative
2799 branch, more often than not this test will fail, so we
2800 test it first to speed things up. */
2801 code = bfd_get_8 (abfd, contents + irel->r_offset + 1);
2802 if (code != 0xca)
2803 continue;
2804
2805 /* Also make sure the next relocation applies to the next
2806 instruction and that it's a pc-relative 8 bit branch. */
2807 nrel = irel + 1;
2808 if (nrel == irelend
2809 || irel->r_offset + 2 != nrel->r_offset
2810 || ELF32_R_TYPE (nrel->r_info) != (int) R_MN10300_PCREL8)
2811 continue;
2812
2813 /* Make sure our destination immediately follows the
2814 unconditional branch. */
2815 if (symval != (sec->output_section->vma + sec->output_offset
2816 + irel->r_offset + 3))
2817 continue;
2818
2819 /* Now make sure we are a conditional branch. This may not
2820 be necessary, but why take the chance.
2821
2822 Note these checks assume that R_MN10300_PCREL8 relocs
2823 only occur on bCC and bCCx insns. If they occured
2824 elsewhere, we'd need to know the start of this insn
2825 for this check to be accurate. */
2826 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2827 if (code != 0xc0 && code != 0xc1 && code != 0xc2
2828 && code != 0xc3 && code != 0xc4 && code != 0xc5
2829 && code != 0xc6 && code != 0xc7 && code != 0xc8
2830 && code != 0xc9 && code != 0xe8 && code != 0xe9
2831 && code != 0xea && code != 0xeb)
2832 continue;
2833
2834 /* We also have to be sure there is no symbol/label
2835 at the unconditional branch. */
2836 if (mn10300_elf_symbol_address_p (abfd, sec, isymbuf,
2837 irel->r_offset + 1))
2838 continue;
2839
2840 /* Note that we've changed the relocs, section contents, etc. */
2841 elf_section_data (sec)->relocs = internal_relocs;
2842 elf_section_data (sec)->this_hdr.contents = contents;
2843 symtab_hdr->contents = (unsigned char *) isymbuf;
2844
2845 /* Reverse the condition of the first branch. */
2846 switch (code)
2847 {
2848 case 0xc8:
2849 code = 0xc9;
2850 break;
2851 case 0xc9:
2852 code = 0xc8;
2853 break;
2854 case 0xc0:
2855 code = 0xc2;
2856 break;
2857 case 0xc2:
2858 code = 0xc0;
2859 break;
2860 case 0xc3:
2861 code = 0xc1;
2862 break;
2863 case 0xc1:
2864 code = 0xc3;
2865 break;
2866 case 0xc4:
2867 code = 0xc6;
2868 break;
2869 case 0xc6:
2870 code = 0xc4;
2871 break;
2872 case 0xc7:
2873 code = 0xc5;
2874 break;
2875 case 0xc5:
2876 code = 0xc7;
2877 break;
2878 case 0xe8:
2879 code = 0xe9;
2880 break;
2881 case 0x9d:
2882 code = 0xe8;
2883 break;
2884 case 0xea:
2885 code = 0xeb;
2886 break;
2887 case 0xeb:
2888 code = 0xea;
2889 break;
2890 }
2891 bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
2892
2893 /* Set the reloc type and symbol for the first branch
2894 from the second branch. */
2895 irel->r_info = nrel->r_info;
2896
2897 /* Make the reloc for the second branch a null reloc. */
2898 nrel->r_info = ELF32_R_INFO (ELF32_R_SYM (nrel->r_info),
2899 R_MN10300_NONE);
2900
2901 /* Delete two bytes of data. */
2902 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2903 irel->r_offset + 1, 2))
2904 goto error_return;
2905
2906 /* That will change things, so, we should relax again.
2907 Note that this is not required, and it may be slow. */
2908 *again = TRUE;
2909 }
2910
2911 /* Try to turn a 24 immediate, displacement or absolute address
2912 into a 8 immediate, displacement or absolute address. */
2913 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_24)
2914 {
2915 bfd_vma value = symval;
2916 value += irel->r_addend;
2917
2918 /* See if the value will fit in 8 bits. */
2919 if ((long) value < 0x7f && (long) value > -0x80)
2920 {
2921 unsigned char code;
2922
2923 /* AM33 insns which have 24 operands are 6 bytes long and
2924 will have 0xfd as the first byte. */
2925
2926 /* Get the first opcode. */
2927 code = bfd_get_8 (abfd, contents + irel->r_offset - 3);
2928
2929 if (code == 0xfd)
2930 {
2931 /* Get the second opcode. */
2932 code = bfd_get_8 (abfd, contents + irel->r_offset - 2);
2933
2934 /* We can not relax 0x6b, 0x7b, 0x8b, 0x9b as no 24bit
2935 equivalent instructions exists. */
2936 if (code != 0x6b && code != 0x7b
2937 && code != 0x8b && code != 0x9b
2938 && ((code & 0x0f) == 0x09 || (code & 0x0f) == 0x08
2939 || (code & 0x0f) == 0x0a || (code & 0x0f) == 0x0b
2940 || (code & 0x0f) == 0x0e))
2941 {
2942 /* Not safe if the high bit is on as relaxing may
2943 move the value out of high mem and thus not fit
2944 in a signed 8bit value. This is currently over
2945 conservative. */
2946 if ((value & 0x80) == 0)
2947 {
2948 /* Note that we've changed the relocation contents,
2949 etc. */
2950 elf_section_data (sec)->relocs = internal_relocs;
2951 elf_section_data (sec)->this_hdr.contents = contents;
2952 symtab_hdr->contents = (unsigned char *) isymbuf;
2953
2954 /* Fix the opcode. */
2955 bfd_put_8 (abfd, 0xfb, contents + irel->r_offset - 3);
2956 bfd_put_8 (abfd, code, contents + irel->r_offset - 2);
2957
2958 /* Fix the relocation's type. */
2959 irel->r_info =
2960 ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2961 R_MN10300_8);
2962
2963 /* Delete two bytes of data. */
2964 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2965 irel->r_offset + 1, 2))
2966 goto error_return;
2967
2968 /* That will change things, so, we should relax
2969 again. Note that this is not required, and it
2970 may be slow. */
2971 *again = TRUE;
2972 break;
2973 }
2974 }
2975 }
2976 }
2977 }
2978
2979 /* Try to turn a 32bit immediate, displacement or absolute address
2980 into a 16bit immediate, displacement or absolute address. */
2981 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_32
2982 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOT32
2983 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOTOFF32
2984 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOTPC32)
2985 {
2986 bfd_vma value = symval;
2987
2988 if (ELF32_R_TYPE (irel->r_info) != (int) R_MN10300_32)
2989 {
2990 asection * sgot;
2991
2992 sgot = bfd_get_section_by_name (elf_hash_table (link_info)
2993 ->dynobj, ".got");
2994
2995 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOT32)
2996 {
2997 value = sgot->output_offset;
2998
2999 if (h)
3000 value += h->root.got.offset;
3001 else
3002 value += (elf_local_got_offsets
3003 (abfd)[ELF32_R_SYM (irel->r_info)]);
3004 }
3005 else if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOTOFF32)
3006 value -= sgot->output_section->vma;
3007 else if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOTPC32)
3008 value = (sgot->output_section->vma
3009 - (sec->output_section->vma
3010 + sec->output_offset
3011 + irel->r_offset));
3012 else
3013 abort ();
3014 }
3015
3016 value += irel->r_addend;
3017
3018 /* See if the value will fit in 24 bits.
3019 We allow any 16bit match here. We prune those we can't
3020 handle below. */
3021 if ((long) value < 0x7fffff && (long) value > -0x800000)
3022 {
3023 unsigned char code;
3024
3025 /* AM33 insns which have 32bit operands are 7 bytes long and
3026 will have 0xfe as the first byte. */
3027
3028 /* Get the first opcode. */
3029 code = bfd_get_8 (abfd, contents + irel->r_offset - 3);
3030
3031 if (code == 0xfe)
3032 {
3033 /* Get the second opcode. */
3034 code = bfd_get_8 (abfd, contents + irel->r_offset - 2);
3035
3036 /* All the am33 32 -> 24 relaxing possibilities. */
3037 /* We can not relax 0x6b, 0x7b, 0x8b, 0x9b as no 24bit
3038 equivalent instructions exists. */
3039 if (code != 0x6b && code != 0x7b
3040 && code != 0x8b && code != 0x9b
3041 && (ELF32_R_TYPE (irel->r_info)
3042 != (int) R_MN10300_GOTPC32)
3043 && ((code & 0x0f) == 0x09 || (code & 0x0f) == 0x08
3044 || (code & 0x0f) == 0x0a || (code & 0x0f) == 0x0b
3045 || (code & 0x0f) == 0x0e))
3046 {
3047 /* Not safe if the high bit is on as relaxing may
3048 move the value out of high mem and thus not fit
3049 in a signed 16bit value. This is currently over
3050 conservative. */
3051 if ((value & 0x8000) == 0)
3052 {
3053 /* Note that we've changed the relocation contents,
3054 etc. */
3055 elf_section_data (sec)->relocs = internal_relocs;
3056 elf_section_data (sec)->this_hdr.contents = contents;
3057 symtab_hdr->contents = (unsigned char *) isymbuf;
3058
3059 /* Fix the opcode. */
3060 bfd_put_8 (abfd, 0xfd, contents + irel->r_offset - 3);
3061 bfd_put_8 (abfd, code, contents + irel->r_offset - 2);
3062
3063 /* Fix the relocation's type. */
3064 irel->r_info =
3065 ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3066 (ELF32_R_TYPE (irel->r_info)
3067 == (int) R_MN10300_GOTOFF32)
3068 ? R_MN10300_GOTOFF24
3069 : (ELF32_R_TYPE (irel->r_info)
3070 == (int) R_MN10300_GOT32)
3071 ? R_MN10300_GOT24 :
3072 R_MN10300_24);
3073
3074 /* Delete one byte of data. */
3075 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3076 irel->r_offset + 3, 1))
3077 goto error_return;
3078
3079 /* That will change things, so, we should relax
3080 again. Note that this is not required, and it
3081 may be slow. */
3082 *again = TRUE;
3083 break;
3084 }
3085 }
3086 }
3087 }
3088
3089 /* See if the value will fit in 16 bits.
3090 We allow any 16bit match here. We prune those we can't
3091 handle below. */
3092 if ((long) value < 0x7fff && (long) value > -0x8000)
3093 {
3094 unsigned char code;
3095
3096 /* Most insns which have 32bit operands are 6 bytes long;
3097 exceptions are pcrel insns and bit insns.
3098
3099 We handle pcrel insns above. We don't bother trying
3100 to handle the bit insns here.
3101
3102 The first byte of the remaining insns will be 0xfc. */
3103
3104 /* Get the first opcode. */
3105 code = bfd_get_8 (abfd, contents + irel->r_offset - 2);
3106
3107 if (code != 0xfc)
3108 continue;
3109
3110 /* Get the second opcode. */
3111 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
3112
3113 if ((code & 0xf0) < 0x80)
3114 switch (code & 0xf0)
3115 {
3116 /* mov (d32,am),dn -> mov (d32,am),dn
3117 mov dm,(d32,am) -> mov dn,(d32,am)
3118 mov (d32,am),an -> mov (d32,am),an
3119 mov dm,(d32,am) -> mov dn,(d32,am)
3120 movbu (d32,am),dn -> movbu (d32,am),dn
3121 movbu dm,(d32,am) -> movbu dn,(d32,am)
3122 movhu (d32,am),dn -> movhu (d32,am),dn
3123 movhu dm,(d32,am) -> movhu dn,(d32,am) */
3124 case 0x00:
3125 case 0x10:
3126 case 0x20:
3127 case 0x30:
3128 case 0x40:
3129 case 0x50:
3130 case 0x60:
3131 case 0x70:
3132 /* Not safe if the high bit is on as relaxing may
3133 move the value out of high mem and thus not fit
3134 in a signed 16bit value. */
3135 if (code == 0xcc
3136 && (value & 0x8000))
3137 continue;
3138
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 /* Fix the opcode. */
3145 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
3146 bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
3147
3148 /* Fix the relocation's type. */
3149 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3150 (ELF32_R_TYPE (irel->r_info)
3151 == (int) R_MN10300_GOTOFF32)
3152 ? R_MN10300_GOTOFF16
3153 : (ELF32_R_TYPE (irel->r_info)
3154 == (int) R_MN10300_GOT32)
3155 ? R_MN10300_GOT16
3156 : (ELF32_R_TYPE (irel->r_info)
3157 == (int) R_MN10300_GOTPC32)
3158 ? R_MN10300_GOTPC16 :
3159 R_MN10300_16);
3160
3161 /* Delete two bytes of data. */
3162 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3163 irel->r_offset + 2, 2))
3164 goto error_return;
3165
3166 /* That will change things, so, we should relax again.
3167 Note that this is not required, and it may be slow. */
3168 *again = TRUE;
3169 break;
3170 }
3171 else if ((code & 0xf0) == 0x80
3172 || (code & 0xf0) == 0x90)
3173 switch (code & 0xf3)
3174 {
3175 /* mov dn,(abs32) -> mov dn,(abs16)
3176 movbu dn,(abs32) -> movbu dn,(abs16)
3177 movhu dn,(abs32) -> movhu dn,(abs16) */
3178 case 0x81:
3179 case 0x82:
3180 case 0x83:
3181 /* Note that we've changed the relocation contents, etc. */
3182 elf_section_data (sec)->relocs = internal_relocs;
3183 elf_section_data (sec)->this_hdr.contents = contents;
3184 symtab_hdr->contents = (unsigned char *) isymbuf;
3185
3186 if ((code & 0xf3) == 0x81)
3187 code = 0x01 + (code & 0x0c);
3188 else if ((code & 0xf3) == 0x82)
3189 code = 0x02 + (code & 0x0c);
3190 else if ((code & 0xf3) == 0x83)
3191 code = 0x03 + (code & 0x0c);
3192 else
3193 abort ();
3194
3195 /* Fix the opcode. */
3196 bfd_put_8 (abfd, code, contents + irel->r_offset - 2);
3197
3198 /* Fix the relocation's type. */
3199 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3200 (ELF32_R_TYPE (irel->r_info)
3201 == (int) R_MN10300_GOTOFF32)
3202 ? R_MN10300_GOTOFF16
3203 : (ELF32_R_TYPE (irel->r_info)
3204 == (int) R_MN10300_GOT32)
3205 ? R_MN10300_GOT16
3206 : (ELF32_R_TYPE (irel->r_info)
3207 == (int) R_MN10300_GOTPC32)
3208 ? R_MN10300_GOTPC16 :
3209 R_MN10300_16);
3210
3211 /* The opcode got shorter too, so we have to fix the
3212 addend and offset too! */
3213 irel->r_offset -= 1;
3214
3215 /* Delete three bytes of data. */
3216 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3217 irel->r_offset + 1, 3))
3218 goto error_return;
3219
3220 /* That will change things, so, we should relax again.
3221 Note that this is not required, and it may be slow. */
3222 *again = TRUE;
3223 break;
3224
3225 /* mov am,(abs32) -> mov am,(abs16)
3226 mov am,(d32,sp) -> mov am,(d16,sp)
3227 mov dm,(d32,sp) -> mov dm,(d32,sp)
3228 movbu dm,(d32,sp) -> movbu dm,(d32,sp)
3229 movhu dm,(d32,sp) -> movhu dm,(d32,sp) */
3230 case 0x80:
3231 case 0x90:
3232 case 0x91:
3233 case 0x92:
3234 case 0x93:
3235 /* sp-based offsets are zero-extended. */
3236 if (code >= 0x90 && code <= 0x93
3237 && (long)value < 0)
3238 continue;
3239
3240 /* Note that we've changed the relocation contents, etc. */
3241 elf_section_data (sec)->relocs = internal_relocs;
3242 elf_section_data (sec)->this_hdr.contents = contents;
3243 symtab_hdr->contents = (unsigned char *) isymbuf;
3244
3245 /* Fix the opcode. */
3246 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
3247 bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
3248
3249 /* Fix the relocation's type. */
3250 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3251 (ELF32_R_TYPE (irel->r_info)
3252 == (int) R_MN10300_GOTOFF32)
3253 ? R_MN10300_GOTOFF16
3254 : (ELF32_R_TYPE (irel->r_info)
3255 == (int) R_MN10300_GOT32)
3256 ? R_MN10300_GOT16
3257 : (ELF32_R_TYPE (irel->r_info)
3258 == (int) R_MN10300_GOTPC32)
3259 ? R_MN10300_GOTPC16 :
3260 R_MN10300_16);
3261
3262 /* Delete two bytes of data. */
3263 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3264 irel->r_offset + 2, 2))
3265 goto error_return;
3266
3267 /* That will change things, so, we should relax again.
3268 Note that this is not required, and it may be slow. */
3269 *again = TRUE;
3270 break;
3271 }
3272 else if ((code & 0xf0) < 0xf0)
3273 switch (code & 0xfc)
3274 {
3275 /* mov imm32,dn -> mov imm16,dn
3276 mov imm32,an -> mov imm16,an
3277 mov (abs32),dn -> mov (abs16),dn
3278 movbu (abs32),dn -> movbu (abs16),dn
3279 movhu (abs32),dn -> movhu (abs16),dn */
3280 case 0xcc:
3281 case 0xdc:
3282 case 0xa4:
3283 case 0xa8:
3284 case 0xac:
3285 /* Not safe if the high bit is on as relaxing may
3286 move the value out of high mem and thus not fit
3287 in a signed 16bit value. */
3288 if (code == 0xcc
3289 && (value & 0x8000))
3290 continue;
3291
3292 /* mov imm16, an zero-extends the immediate. */
3293 if (code == 0xdc
3294 && (long)value < 0)
3295 continue;
3296
3297 /* Note that we've changed the relocation contents, etc. */
3298 elf_section_data (sec)->relocs = internal_relocs;
3299 elf_section_data (sec)->this_hdr.contents = contents;
3300 symtab_hdr->contents = (unsigned char *) isymbuf;
3301
3302 if ((code & 0xfc) == 0xcc)
3303 code = 0x2c + (code & 0x03);
3304 else if ((code & 0xfc) == 0xdc)
3305 code = 0x24 + (code & 0x03);
3306 else if ((code & 0xfc) == 0xa4)
3307 code = 0x30 + (code & 0x03);
3308 else if ((code & 0xfc) == 0xa8)
3309 code = 0x34 + (code & 0x03);
3310 else if ((code & 0xfc) == 0xac)
3311 code = 0x38 + (code & 0x03);
3312 else
3313 abort ();
3314
3315 /* Fix the opcode. */
3316 bfd_put_8 (abfd, code, contents + irel->r_offset - 2);
3317
3318 /* Fix the relocation's type. */
3319 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3320 (ELF32_R_TYPE (irel->r_info)
3321 == (int) R_MN10300_GOTOFF32)
3322 ? R_MN10300_GOTOFF16
3323 : (ELF32_R_TYPE (irel->r_info)
3324 == (int) R_MN10300_GOT32)
3325 ? R_MN10300_GOT16
3326 : (ELF32_R_TYPE (irel->r_info)
3327 == (int) R_MN10300_GOTPC32)
3328 ? R_MN10300_GOTPC16 :
3329 R_MN10300_16);
3330
3331 /* The opcode got shorter too, so we have to fix the
3332 addend and offset too! */
3333 irel->r_offset -= 1;
3334
3335 /* Delete three bytes of data. */
3336 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3337 irel->r_offset + 1, 3))
3338 goto error_return;
3339
3340 /* That will change things, so, we should relax again.
3341 Note that this is not required, and it may be slow. */
3342 *again = TRUE;
3343 break;
3344
3345 /* mov (abs32),an -> mov (abs16),an
3346 mov (d32,sp),an -> mov (d16,sp),an
3347 mov (d32,sp),dn -> mov (d16,sp),dn
3348 movbu (d32,sp),dn -> movbu (d16,sp),dn
3349 movhu (d32,sp),dn -> movhu (d16,sp),dn
3350 add imm32,dn -> add imm16,dn
3351 cmp imm32,dn -> cmp imm16,dn
3352 add imm32,an -> add imm16,an
3353 cmp imm32,an -> cmp imm16,an
3354 and imm32,dn -> and imm16,dn
3355 or imm32,dn -> or imm16,dn
3356 xor imm32,dn -> xor imm16,dn
3357 btst imm32,dn -> btst imm16,dn */
3358
3359 case 0xa0:
3360 case 0xb0:
3361 case 0xb1:
3362 case 0xb2:
3363 case 0xb3:
3364 case 0xc0:
3365 case 0xc8:
3366
3367 case 0xd0:
3368 case 0xd8:
3369 case 0xe0:
3370 case 0xe1:
3371 case 0xe2:
3372 case 0xe3:
3373 /* cmp imm16, an zero-extends the immediate. */
3374 if (code == 0xdc
3375 && (long)value < 0)
3376 continue;
3377
3378 /* So do sp-based offsets. */
3379 if (code >= 0xb0 && code <= 0xb3
3380 && (long)value < 0)
3381 continue;
3382
3383 /* Note that we've changed the relocation contents, etc. */
3384 elf_section_data (sec)->relocs = internal_relocs;
3385 elf_section_data (sec)->this_hdr.contents = contents;
3386 symtab_hdr->contents = (unsigned char *) isymbuf;
3387
3388 /* Fix the opcode. */
3389 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
3390 bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
3391
3392 /* Fix the relocation's type. */
3393 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3394 (ELF32_R_TYPE (irel->r_info)
3395 == (int) R_MN10300_GOTOFF32)
3396 ? R_MN10300_GOTOFF16
3397 : (ELF32_R_TYPE (irel->r_info)
3398 == (int) R_MN10300_GOT32)
3399 ? R_MN10300_GOT16
3400 : (ELF32_R_TYPE (irel->r_info)
3401 == (int) R_MN10300_GOTPC32)
3402 ? R_MN10300_GOTPC16 :
3403 R_MN10300_16);
3404
3405 /* Delete two bytes of data. */
3406 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3407 irel->r_offset + 2, 2))
3408 goto error_return;
3409
3410 /* That will change things, so, we should relax again.
3411 Note that this is not required, and it may be slow. */
3412 *again = TRUE;
3413 break;
3414 }
3415 else if (code == 0xfe)
3416 {
3417 /* add imm32,sp -> add imm16,sp */
3418
3419 /* Note that we've changed the relocation contents, etc. */
3420 elf_section_data (sec)->relocs = internal_relocs;
3421 elf_section_data (sec)->this_hdr.contents = contents;
3422 symtab_hdr->contents = (unsigned char *) isymbuf;
3423
3424 /* Fix the opcode. */
3425 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
3426 bfd_put_8 (abfd, 0xfe, contents + irel->r_offset - 1);
3427
3428 /* Fix the relocation's type. */
3429 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3430 (ELF32_R_TYPE (irel->r_info)
3431 == (int) R_MN10300_GOT32)
3432 ? R_MN10300_GOT16
3433 : (ELF32_R_TYPE (irel->r_info)
3434 == (int) R_MN10300_GOTOFF32)
3435 ? R_MN10300_GOTOFF16
3436 : (ELF32_R_TYPE (irel->r_info)
3437 == (int) R_MN10300_GOTPC32)
3438 ? R_MN10300_GOTPC16 :
3439 R_MN10300_16);
3440
3441 /* Delete two bytes of data. */
3442 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3443 irel->r_offset + 2, 2))
3444 goto error_return;
3445
3446 /* That will change things, so, we should relax again.
3447 Note that this is not required, and it may be slow. */
3448 *again = TRUE;
3449 break;
3450 }
3451 }
3452 }
3453 }
3454
3455 if (isymbuf != NULL
3456 && symtab_hdr->contents != (unsigned char *) isymbuf)
3457 {
3458 if (! link_info->keep_memory)
3459 free (isymbuf);
3460 else
3461 {
3462 /* Cache the symbols for elf_link_input_bfd. */
3463 symtab_hdr->contents = (unsigned char *) isymbuf;
3464 }
3465 }
3466
3467 if (contents != NULL
3468 && elf_section_data (sec)->this_hdr.contents != contents)
3469 {
3470 if (! link_info->keep_memory)
3471 free (contents);
3472 else
3473 {
3474 /* Cache the section contents for elf_link_input_bfd. */
3475 elf_section_data (sec)->this_hdr.contents = contents;
3476 }
3477 }
3478
3479 if (internal_relocs != NULL
3480 && elf_section_data (sec)->relocs != internal_relocs)
3481 free (internal_relocs);
3482
3483 return TRUE;
3484
3485 error_return:
3486 if (isymbuf != NULL
3487 && symtab_hdr->contents != (unsigned char *) isymbuf)
3488 free (isymbuf);
3489 if (contents != NULL
3490 && elf_section_data (section)->this_hdr.contents != contents)
3491 free (contents);
3492 if (internal_relocs != NULL
3493 && elf_section_data (section)->relocs != internal_relocs)
3494 free (internal_relocs);
3495
3496 return FALSE;
3497 }
3498
3499 /* Compute the stack size and movm arguments for the function
3500 referred to by HASH at address ADDR in section with
3501 contents CONTENTS, store the information in the hash table. */
3502 static void
3503 compute_function_info (abfd, hash, addr, contents)
3504 bfd *abfd;
3505 struct elf32_mn10300_link_hash_entry *hash;
3506 bfd_vma addr;
3507 unsigned char *contents;
3508 {
3509 unsigned char byte1, byte2;
3510 /* We only care about a very small subset of the possible prologue
3511 sequences here. Basically we look for:
3512
3513 movm [d2,d3,a2,a3],sp (optional)
3514 add <size>,sp (optional, and only for sizes which fit in an unsigned
3515 8 bit number)
3516
3517 If we find anything else, we quit. */
3518
3519 /* Look for movm [regs],sp */
3520 byte1 = bfd_get_8 (abfd, contents + addr);
3521 byte2 = bfd_get_8 (abfd, contents + addr + 1);
3522
3523 if (byte1 == 0xcf)
3524 {
3525 hash->movm_args = byte2;
3526 addr += 2;
3527 byte1 = bfd_get_8 (abfd, contents + addr);
3528 byte2 = bfd_get_8 (abfd, contents + addr + 1);
3529 }
3530
3531 /* Now figure out how much stack space will be allocated by the movm
3532 instruction. We need this kept separate from the function's normal
3533 stack space. */
3534 if (hash->movm_args)
3535 {
3536 /* Space for d2. */
3537 if (hash->movm_args & 0x80)
3538 hash->movm_stack_size += 4;
3539
3540 /* Space for d3. */
3541 if (hash->movm_args & 0x40)
3542 hash->movm_stack_size += 4;
3543
3544 /* Space for a2. */
3545 if (hash->movm_args & 0x20)
3546 hash->movm_stack_size += 4;
3547
3548 /* Space for a3. */
3549 if (hash->movm_args & 0x10)
3550 hash->movm_stack_size += 4;
3551
3552 /* "other" space. d0, d1, a0, a1, mdr, lir, lar, 4 byte pad. */
3553 if (hash->movm_args & 0x08)
3554 hash->movm_stack_size += 8 * 4;
3555
3556 if (bfd_get_mach (abfd) == bfd_mach_am33
3557 || bfd_get_mach (abfd) == bfd_mach_am33_2)
3558 {
3559 /* "exother" space. e0, e1, mdrq, mcrh, mcrl, mcvf */
3560 if (hash->movm_args & 0x1)
3561 hash->movm_stack_size += 6 * 4;
3562
3563 /* exreg1 space. e4, e5, e6, e7 */
3564 if (hash->movm_args & 0x2)
3565 hash->movm_stack_size += 4 * 4;
3566
3567 /* exreg0 space. e2, e3 */
3568 if (hash->movm_args & 0x4)
3569 hash->movm_stack_size += 2 * 4;
3570 }
3571 }
3572
3573 /* Now look for the two stack adjustment variants. */
3574 if (byte1 == 0xf8 && byte2 == 0xfe)
3575 {
3576 int temp = bfd_get_8 (abfd, contents + addr + 2);
3577 temp = ((temp & 0xff) ^ (~0x7f)) + 0x80;
3578
3579 hash->stack_size = -temp;
3580 }
3581 else if (byte1 == 0xfa && byte2 == 0xfe)
3582 {
3583 int temp = bfd_get_16 (abfd, contents + addr + 2);
3584 temp = ((temp & 0xffff) ^ (~0x7fff)) + 0x8000;
3585 temp = -temp;
3586
3587 if (temp < 255)
3588 hash->stack_size = temp;
3589 }
3590
3591 /* If the total stack to be allocated by the call instruction is more
3592 than 255 bytes, then we can't remove the stack adjustment by using
3593 "call" (we might still be able to remove the "movm" instruction. */
3594 if (hash->stack_size + hash->movm_stack_size > 255)
3595 hash->stack_size = 0;
3596
3597 return;
3598 }
3599
3600 /* Delete some bytes from a section while relaxing. */
3601
3602 static bfd_boolean
3603 mn10300_elf_relax_delete_bytes (abfd, sec, addr, count)
3604 bfd *abfd;
3605 asection *sec;
3606 bfd_vma addr;
3607 int count;
3608 {
3609 Elf_Internal_Shdr *symtab_hdr;
3610 unsigned int sec_shndx;
3611 bfd_byte *contents;
3612 Elf_Internal_Rela *irel, *irelend;
3613 Elf_Internal_Rela *irelalign;
3614 bfd_vma toaddr;
3615 Elf_Internal_Sym *isym, *isymend;
3616 struct elf_link_hash_entry **sym_hashes;
3617 struct elf_link_hash_entry **end_hashes;
3618 unsigned int symcount;
3619
3620 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
3621
3622 contents = elf_section_data (sec)->this_hdr.contents;
3623
3624 /* The deletion must stop at the next ALIGN reloc for an aligment
3625 power larger than the number of bytes we are deleting. */
3626
3627 irelalign = NULL;
3628 toaddr = sec->_cooked_size;
3629
3630 irel = elf_section_data (sec)->relocs;
3631 irelend = irel + sec->reloc_count;
3632
3633 /* Actually delete the bytes. */
3634 memmove (contents + addr, contents + addr + count,
3635 (size_t) (toaddr - addr - count));
3636 sec->_cooked_size -= count;
3637
3638 /* Adjust all the relocs. */
3639 for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
3640 {
3641 /* Get the new reloc address. */
3642 if ((irel->r_offset > addr
3643 && irel->r_offset < toaddr))
3644 irel->r_offset -= count;
3645 }
3646
3647 /* Adjust the local symbols defined in this section. */
3648 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3649 isym = (Elf_Internal_Sym *) symtab_hdr->contents;
3650 for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
3651 {
3652 if (isym->st_shndx == sec_shndx
3653 && isym->st_value > addr
3654 && isym->st_value < toaddr)
3655 isym->st_value -= count;
3656 }
3657
3658 /* Now adjust the global symbols defined in this section. */
3659 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
3660 - symtab_hdr->sh_info);
3661 sym_hashes = elf_sym_hashes (abfd);
3662 end_hashes = sym_hashes + symcount;
3663 for (; sym_hashes < end_hashes; sym_hashes++)
3664 {
3665 struct elf_link_hash_entry *sym_hash = *sym_hashes;
3666 if ((sym_hash->root.type == bfd_link_hash_defined
3667 || sym_hash->root.type == bfd_link_hash_defweak)
3668 && sym_hash->root.u.def.section == sec
3669 && sym_hash->root.u.def.value > addr
3670 && sym_hash->root.u.def.value < toaddr)
3671 {
3672 sym_hash->root.u.def.value -= count;
3673 }
3674 }
3675
3676 return TRUE;
3677 }
3678
3679 /* Return TRUE if a symbol exists at the given address, else return
3680 FALSE. */
3681 static bfd_boolean
3682 mn10300_elf_symbol_address_p (abfd, sec, isym, addr)
3683 bfd *abfd;
3684 asection *sec;
3685 Elf_Internal_Sym *isym;
3686 bfd_vma addr;
3687 {
3688 Elf_Internal_Shdr *symtab_hdr;
3689 unsigned int sec_shndx;
3690 Elf_Internal_Sym *isymend;
3691 struct elf_link_hash_entry **sym_hashes;
3692 struct elf_link_hash_entry **end_hashes;
3693 unsigned int symcount;
3694
3695 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
3696
3697 /* Examine all the symbols. */
3698 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3699 for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
3700 {
3701 if (isym->st_shndx == sec_shndx
3702 && isym->st_value == addr)
3703 return TRUE;
3704 }
3705
3706 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
3707 - symtab_hdr->sh_info);
3708 sym_hashes = elf_sym_hashes (abfd);
3709 end_hashes = sym_hashes + symcount;
3710 for (; sym_hashes < end_hashes; sym_hashes++)
3711 {
3712 struct elf_link_hash_entry *sym_hash = *sym_hashes;
3713 if ((sym_hash->root.type == bfd_link_hash_defined
3714 || sym_hash->root.type == bfd_link_hash_defweak)
3715 && sym_hash->root.u.def.section == sec
3716 && sym_hash->root.u.def.value == addr)
3717 return TRUE;
3718 }
3719
3720 return FALSE;
3721 }
3722
3723 /* This is a version of bfd_generic_get_relocated_section_contents
3724 which uses mn10300_elf_relocate_section. */
3725
3726 static bfd_byte *
3727 mn10300_elf_get_relocated_section_contents (output_bfd, link_info, link_order,
3728 data, relocatable, symbols)
3729 bfd *output_bfd;
3730 struct bfd_link_info *link_info;
3731 struct bfd_link_order *link_order;
3732 bfd_byte *data;
3733 bfd_boolean relocatable;
3734 asymbol **symbols;
3735 {
3736 Elf_Internal_Shdr *symtab_hdr;
3737 asection *input_section = link_order->u.indirect.section;
3738 bfd *input_bfd = input_section->owner;
3739 asection **sections = NULL;
3740 Elf_Internal_Rela *internal_relocs = NULL;
3741 Elf_Internal_Sym *isymbuf = NULL;
3742
3743 /* We only need to handle the case of relaxing, or of having a
3744 particular set of section contents, specially. */
3745 if (relocatable
3746 || elf_section_data (input_section)->this_hdr.contents == NULL)
3747 return bfd_generic_get_relocated_section_contents (output_bfd, link_info,
3748 link_order, data,
3749 relocatable,
3750 symbols);
3751
3752 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3753
3754 memcpy (data, elf_section_data (input_section)->this_hdr.contents,
3755 (size_t) input_section->_raw_size);
3756
3757 if ((input_section->flags & SEC_RELOC) != 0
3758 && input_section->reloc_count > 0)
3759 {
3760 asection **secpp;
3761 Elf_Internal_Sym *isym, *isymend;
3762 bfd_size_type amt;
3763
3764 internal_relocs = (_bfd_elf_link_read_relocs
3765 (input_bfd, input_section, (PTR) NULL,
3766 (Elf_Internal_Rela *) NULL, FALSE));
3767 if (internal_relocs == NULL)
3768 goto error_return;
3769
3770 if (symtab_hdr->sh_info != 0)
3771 {
3772 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
3773 if (isymbuf == NULL)
3774 isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
3775 symtab_hdr->sh_info, 0,
3776 NULL, NULL, NULL);
3777 if (isymbuf == NULL)
3778 goto error_return;
3779 }
3780
3781 amt = symtab_hdr->sh_info;
3782 amt *= sizeof (asection *);
3783 sections = (asection **) bfd_malloc (amt);
3784 if (sections == NULL && amt != 0)
3785 goto error_return;
3786
3787 isymend = isymbuf + symtab_hdr->sh_info;
3788 for (isym = isymbuf, secpp = sections; isym < isymend; ++isym, ++secpp)
3789 {
3790 asection *isec;
3791
3792 if (isym->st_shndx == SHN_UNDEF)
3793 isec = bfd_und_section_ptr;
3794 else if (isym->st_shndx == SHN_ABS)
3795 isec = bfd_abs_section_ptr;
3796 else if (isym->st_shndx == SHN_COMMON)
3797 isec = bfd_com_section_ptr;
3798 else
3799 isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx);
3800
3801 *secpp = isec;
3802 }
3803
3804 if (! mn10300_elf_relocate_section (output_bfd, link_info, input_bfd,
3805 input_section, data, internal_relocs,
3806 isymbuf, sections))
3807 goto error_return;
3808
3809 if (sections != NULL)
3810 free (sections);
3811 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
3812 free (isymbuf);
3813 if (internal_relocs != elf_section_data (input_section)->relocs)
3814 free (internal_relocs);
3815 }
3816
3817 return data;
3818
3819 error_return:
3820 if (sections != NULL)
3821 free (sections);
3822 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
3823 free (isymbuf);
3824 if (internal_relocs != NULL
3825 && internal_relocs != elf_section_data (input_section)->relocs)
3826 free (internal_relocs);
3827 return NULL;
3828 }
3829
3830 /* Assorted hash table functions. */
3831
3832 /* Initialize an entry in the link hash table. */
3833
3834 /* Create an entry in an MN10300 ELF linker hash table. */
3835
3836 static struct bfd_hash_entry *
3837 elf32_mn10300_link_hash_newfunc (entry, table, string)
3838 struct bfd_hash_entry *entry;
3839 struct bfd_hash_table *table;
3840 const char *string;
3841 {
3842 struct elf32_mn10300_link_hash_entry *ret =
3843 (struct elf32_mn10300_link_hash_entry *) entry;
3844
3845 /* Allocate the structure if it has not already been allocated by a
3846 subclass. */
3847 if (ret == (struct elf32_mn10300_link_hash_entry *) NULL)
3848 ret = ((struct elf32_mn10300_link_hash_entry *)
3849 bfd_hash_allocate (table,
3850 sizeof (struct elf32_mn10300_link_hash_entry)));
3851 if (ret == (struct elf32_mn10300_link_hash_entry *) NULL)
3852 return (struct bfd_hash_entry *) ret;
3853
3854 /* Call the allocation method of the superclass. */
3855 ret = ((struct elf32_mn10300_link_hash_entry *)
3856 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
3857 table, string));
3858 if (ret != (struct elf32_mn10300_link_hash_entry *) NULL)
3859 {
3860 ret->direct_calls = 0;
3861 ret->stack_size = 0;
3862 ret->movm_args = 0;
3863 ret->movm_stack_size = 0;
3864 ret->pcrel_relocs_copied = NULL;
3865 ret->flags = 0;
3866 }
3867
3868 return (struct bfd_hash_entry *) ret;
3869 }
3870
3871 /* Create an mn10300 ELF linker hash table. */
3872
3873 static struct bfd_link_hash_table *
3874 elf32_mn10300_link_hash_table_create (abfd)
3875 bfd *abfd;
3876 {
3877 struct elf32_mn10300_link_hash_table *ret;
3878 bfd_size_type amt = sizeof (struct elf32_mn10300_link_hash_table);
3879
3880 ret = (struct elf32_mn10300_link_hash_table *) bfd_malloc (amt);
3881 if (ret == (struct elf32_mn10300_link_hash_table *) NULL)
3882 return NULL;
3883
3884 if (! _bfd_elf_link_hash_table_init (&ret->root, abfd,
3885 elf32_mn10300_link_hash_newfunc))
3886 {
3887 free (ret);
3888 return NULL;
3889 }
3890
3891 ret->flags = 0;
3892 amt = sizeof (struct elf_link_hash_table);
3893 ret->static_hash_table
3894 = (struct elf32_mn10300_link_hash_table *) bfd_malloc (amt);
3895 if (ret->static_hash_table == NULL)
3896 {
3897 free (ret);
3898 return NULL;
3899 }
3900
3901 if (! _bfd_elf_link_hash_table_init (&ret->static_hash_table->root, abfd,
3902 elf32_mn10300_link_hash_newfunc))
3903 {
3904 free (ret->static_hash_table);
3905 free (ret);
3906 return NULL;
3907 }
3908 return &ret->root.root;
3909 }
3910
3911 /* Free an mn10300 ELF linker hash table. */
3912
3913 static void
3914 elf32_mn10300_link_hash_table_free (hash)
3915 struct bfd_link_hash_table *hash;
3916 {
3917 struct elf32_mn10300_link_hash_table *ret
3918 = (struct elf32_mn10300_link_hash_table *) hash;
3919
3920 _bfd_generic_link_hash_table_free
3921 ((struct bfd_link_hash_table *) ret->static_hash_table);
3922 _bfd_generic_link_hash_table_free
3923 ((struct bfd_link_hash_table *) ret);
3924 }
3925
3926 static unsigned long
3927 elf_mn10300_mach (flags)
3928 flagword flags;
3929 {
3930 switch (flags & EF_MN10300_MACH)
3931 {
3932 case E_MN10300_MACH_MN10300:
3933 default:
3934 return bfd_mach_mn10300;
3935
3936 case E_MN10300_MACH_AM33:
3937 return bfd_mach_am33;
3938
3939 case E_MN10300_MACH_AM33_2:
3940 return bfd_mach_am33_2;
3941 }
3942 }
3943
3944 /* The final processing done just before writing out a MN10300 ELF object
3945 file. This gets the MN10300 architecture right based on the machine
3946 number. */
3947
3948 void
3949 _bfd_mn10300_elf_final_write_processing (abfd, linker)
3950 bfd *abfd;
3951 bfd_boolean linker ATTRIBUTE_UNUSED;
3952 {
3953 unsigned long val;
3954
3955 switch (bfd_get_mach (abfd))
3956 {
3957 default:
3958 case bfd_mach_mn10300:
3959 val = E_MN10300_MACH_MN10300;
3960 break;
3961
3962 case bfd_mach_am33:
3963 val = E_MN10300_MACH_AM33;
3964 break;
3965
3966 case bfd_mach_am33_2:
3967 val = E_MN10300_MACH_AM33_2;
3968 break;
3969 }
3970
3971 elf_elfheader (abfd)->e_flags &= ~ (EF_MN10300_MACH);
3972 elf_elfheader (abfd)->e_flags |= val;
3973 }
3974
3975 bfd_boolean
3976 _bfd_mn10300_elf_object_p (abfd)
3977 bfd *abfd;
3978 {
3979 bfd_default_set_arch_mach (abfd, bfd_arch_mn10300,
3980 elf_mn10300_mach (elf_elfheader (abfd)->e_flags));
3981 return TRUE;
3982 }
3983
3984 /* Merge backend specific data from an object file to the output
3985 object file when linking. */
3986
3987 bfd_boolean
3988 _bfd_mn10300_elf_merge_private_bfd_data (ibfd, obfd)
3989 bfd *ibfd;
3990 bfd *obfd;
3991 {
3992 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3993 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3994 return TRUE;
3995
3996 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
3997 && bfd_get_mach (obfd) < bfd_get_mach (ibfd))
3998 {
3999 if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd),
4000 bfd_get_mach (ibfd)))
4001 return FALSE;
4002 }
4003
4004 return TRUE;
4005 }
4006
4007 #define PLT0_ENTRY_SIZE 15
4008 #define PLT_ENTRY_SIZE 20
4009 #define PIC_PLT_ENTRY_SIZE 24
4010
4011 static const bfd_byte elf_mn10300_plt0_entry[PLT0_ENTRY_SIZE] =
4012 {
4013 0xfc, 0xa0, 0, 0, 0, 0, /* mov (.got+8),a0 */
4014 0xfe, 0xe, 0x10, 0, 0, 0, 0, /* mov (.got+4),r1 */
4015 0xf0, 0xf4, /* jmp (a0) */
4016 };
4017
4018 static const bfd_byte elf_mn10300_plt_entry[PLT_ENTRY_SIZE] =
4019 {
4020 0xfc, 0xa0, 0, 0, 0, 0, /* mov (nameN@GOT + .got),a0 */
4021 0xf0, 0xf4, /* jmp (a0) */
4022 0xfe, 8, 0, 0, 0, 0, 0, /* mov reloc-table-address,r0 */
4023 0xdc, 0, 0, 0, 0, /* jmp .plt0 */
4024 };
4025
4026 static const bfd_byte elf_mn10300_pic_plt_entry[PIC_PLT_ENTRY_SIZE] =
4027 {
4028 0xfc, 0x22, 0, 0, 0, 0, /* mov (nameN@GOT,a2),a0 */
4029 0xf0, 0xf4, /* jmp (a0) */
4030 0xfe, 8, 0, 0, 0, 0, 0, /* mov reloc-table-address,r0 */
4031 0xf8, 0x22, 8, /* mov (8,a2),a0 */
4032 0xfb, 0xa, 0x1a, 4, /* mov (4,a2),r1 */
4033 0xf0, 0xf4, /* jmp (a0) */
4034 };
4035
4036 /* Return size of the first PLT entry. */
4037 #define elf_mn10300_sizeof_plt0(info) \
4038 (info->shared ? PIC_PLT_ENTRY_SIZE : PLT0_ENTRY_SIZE)
4039
4040 /* Return size of a PLT entry. */
4041 #define elf_mn10300_sizeof_plt(info) \
4042 (info->shared ? PIC_PLT_ENTRY_SIZE : PLT_ENTRY_SIZE)
4043
4044 /* Return offset of the PLT0 address in an absolute PLT entry. */
4045 #define elf_mn10300_plt_plt0_offset(info) 16
4046
4047 /* Return offset of the linker in PLT0 entry. */
4048 #define elf_mn10300_plt0_linker_offset(info) 2
4049
4050 /* Return offset of the GOT id in PLT0 entry. */
4051 #define elf_mn10300_plt0_gotid_offset(info) 9
4052
4053 /* Return offset of the temporary in PLT entry */
4054 #define elf_mn10300_plt_temp_offset(info) 8
4055
4056 /* Return offset of the symbol in PLT entry. */
4057 #define elf_mn10300_plt_symbol_offset(info) 2
4058
4059 /* Return offset of the relocation in PLT entry. */
4060 #define elf_mn10300_plt_reloc_offset(info) 11
4061
4062 /* The name of the dynamic interpreter. This is put in the .interp
4063 section. */
4064
4065 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
4066
4067 /* Create dynamic sections when linking against a dynamic object. */
4068
4069 static bfd_boolean
4070 _bfd_mn10300_elf_create_dynamic_sections (abfd, info)
4071 bfd *abfd;
4072 struct bfd_link_info *info;
4073 {
4074 flagword flags;
4075 asection * s;
4076 const struct elf_backend_data * bed = get_elf_backend_data (abfd);
4077 int ptralign = 0;
4078
4079 switch (bed->s->arch_size)
4080 {
4081 case 32:
4082 ptralign = 2;
4083 break;
4084
4085 case 64:
4086 ptralign = 3;
4087 break;
4088
4089 default:
4090 bfd_set_error (bfd_error_bad_value);
4091 return FALSE;
4092 }
4093
4094 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
4095 .rel[a].bss sections. */
4096
4097 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4098 | SEC_LINKER_CREATED);
4099
4100 s = bfd_make_section (abfd,
4101 bed->default_use_rela_p ? ".rela.plt" : ".rel.plt");
4102 if (s == NULL
4103 || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
4104 || ! bfd_set_section_alignment (abfd, s, ptralign))
4105 return FALSE;
4106
4107 if (! _bfd_mn10300_elf_create_got_section (abfd, info))
4108 return FALSE;
4109
4110 {
4111 const char * secname;
4112 char * relname;
4113 flagword secflags;
4114 asection * sec;
4115
4116 for (sec = abfd->sections; sec; sec = sec->next)
4117 {
4118 secflags = bfd_get_section_flags (abfd, sec);
4119 if ((secflags & (SEC_DATA | SEC_LINKER_CREATED))
4120 || ((secflags & SEC_HAS_CONTENTS) != SEC_HAS_CONTENTS))
4121 continue;
4122
4123 secname = bfd_get_section_name (abfd, sec);
4124 relname = (char *) bfd_malloc (strlen (secname) + 6);
4125 strcpy (relname, ".rela");
4126 strcat (relname, secname);
4127
4128 s = bfd_make_section (abfd, relname);
4129 if (s == NULL
4130 || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
4131 || ! bfd_set_section_alignment (abfd, s, ptralign))
4132 return FALSE;
4133 }
4134 }
4135
4136 if (bed->want_dynbss)
4137 {
4138 /* The .dynbss section is a place to put symbols which are defined
4139 by dynamic objects, are referenced by regular objects, and are
4140 not functions. We must allocate space for them in the process
4141 image and use a R_*_COPY reloc to tell the dynamic linker to
4142 initialize them at run time. The linker script puts the .dynbss
4143 section into the .bss section of the final image. */
4144 s = bfd_make_section (abfd, ".dynbss");
4145 if (s == NULL
4146 || ! bfd_set_section_flags (abfd, s, SEC_ALLOC))
4147 return FALSE;
4148
4149 /* The .rel[a].bss section holds copy relocs. This section is not
4150 normally needed. We need to create it here, though, so that the
4151 linker will map it to an output section. We can't just create it
4152 only if we need it, because we will not know whether we need it
4153 until we have seen all the input files, and the first time the
4154 main linker code calls BFD after examining all the input files
4155 (size_dynamic_sections) the input sections have already been
4156 mapped to the output sections. If the section turns out not to
4157 be needed, we can discard it later. We will never need this
4158 section when generating a shared object, since they do not use
4159 copy relocs. */
4160 if (! info->shared)
4161 {
4162 s = bfd_make_section (abfd,
4163 (bed->default_use_rela_p
4164 ? ".rela.bss" : ".rel.bss"));
4165 if (s == NULL
4166 || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
4167 || ! bfd_set_section_alignment (abfd, s, ptralign))
4168 return FALSE;
4169 }
4170 }
4171
4172 return TRUE;
4173 }
4174 \f
4175 /* Adjust a symbol defined by a dynamic object and referenced by a
4176 regular object. The current definition is in some section of the
4177 dynamic object, but we're not including those sections. We have to
4178 change the definition to something the rest of the link can
4179 understand. */
4180
4181 static bfd_boolean
4182 _bfd_mn10300_elf_adjust_dynamic_symbol (info, h)
4183 struct bfd_link_info * info;
4184 struct elf_link_hash_entry * h;
4185 {
4186 bfd * dynobj;
4187 asection * s;
4188 unsigned int power_of_two;
4189
4190 dynobj = elf_hash_table (info)->dynobj;
4191
4192 /* Make sure we know what is going on here. */
4193 BFD_ASSERT (dynobj != NULL
4194 && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
4195 || h->weakdef != NULL
4196 || ((h->elf_link_hash_flags
4197 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
4198 && (h->elf_link_hash_flags
4199 & ELF_LINK_HASH_REF_REGULAR) != 0
4200 && (h->elf_link_hash_flags
4201 & ELF_LINK_HASH_DEF_REGULAR) == 0)));
4202
4203 /* If this is a function, put it in the procedure linkage table. We
4204 will fill in the contents of the procedure linkage table later,
4205 when we know the address of the .got section. */
4206 if (h->type == STT_FUNC
4207 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
4208 {
4209 if (! info->shared
4210 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
4211 && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0)
4212 {
4213 /* This case can occur if we saw a PLT reloc in an input
4214 file, but the symbol was never referred to by a dynamic
4215 object. In such a case, we don't actually need to build
4216 a procedure linkage table, and we can just do a REL32
4217 reloc instead. */
4218 BFD_ASSERT ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0);
4219 return TRUE;
4220 }
4221
4222 /* Make sure this symbol is output as a dynamic symbol. */
4223 if (h->dynindx == -1)
4224 {
4225 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4226 return FALSE;
4227 }
4228
4229 s = bfd_get_section_by_name (dynobj, ".plt");
4230 BFD_ASSERT (s != NULL);
4231
4232 /* If this is the first .plt entry, make room for the special
4233 first entry. */
4234 if (s->_raw_size == 0)
4235 s->_raw_size += elf_mn10300_sizeof_plt0 (info);
4236
4237 /* If this symbol is not defined in a regular file, and we are
4238 not generating a shared library, then set the symbol to this
4239 location in the .plt. This is required to make function
4240 pointers compare as equal between the normal executable and
4241 the shared library. */
4242 if (! info->shared
4243 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
4244 {
4245 h->root.u.def.section = s;
4246 h->root.u.def.value = s->_raw_size;
4247 }
4248
4249 h->plt.offset = s->_raw_size;
4250
4251 /* Make room for this entry. */
4252 s->_raw_size += elf_mn10300_sizeof_plt (info);
4253
4254 /* We also need to make an entry in the .got.plt section, which
4255 will be placed in the .got section by the linker script. */
4256
4257 s = bfd_get_section_by_name (dynobj, ".got.plt");
4258 BFD_ASSERT (s != NULL);
4259 s->_raw_size += 4;
4260
4261 /* We also need to make an entry in the .rela.plt section. */
4262
4263 s = bfd_get_section_by_name (dynobj, ".rela.plt");
4264 BFD_ASSERT (s != NULL);
4265 s->_raw_size += sizeof (Elf32_External_Rela);
4266
4267 return TRUE;
4268 }
4269
4270 /* If this is a weak symbol, and there is a real definition, the
4271 processor independent code will have arranged for us to see the
4272 real definition first, and we can just use the same value. */
4273 if (h->weakdef != NULL)
4274 {
4275 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
4276 || h->weakdef->root.type == bfd_link_hash_defweak);
4277 h->root.u.def.section = h->weakdef->root.u.def.section;
4278 h->root.u.def.value = h->weakdef->root.u.def.value;
4279 return TRUE;
4280 }
4281
4282 /* This is a reference to a symbol defined by a dynamic object which
4283 is not a function. */
4284
4285 /* If we are creating a shared library, we must presume that the
4286 only references to the symbol are via the global offset table.
4287 For such cases we need not do anything here; the relocations will
4288 be handled correctly by relocate_section. */
4289 if (info->shared)
4290 return TRUE;
4291
4292 /* If there are no references to this symbol that do not use the
4293 GOT, we don't need to generate a copy reloc. */
4294 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
4295 return TRUE;
4296
4297 /* We must allocate the symbol in our .dynbss section, which will
4298 become part of the .bss section of the executable. There will be
4299 an entry for this symbol in the .dynsym section. The dynamic
4300 object will contain position independent code, so all references
4301 from the dynamic object to this symbol will go through the global
4302 offset table. The dynamic linker will use the .dynsym entry to
4303 determine the address it must put in the global offset table, so
4304 both the dynamic object and the regular object will refer to the
4305 same memory location for the variable. */
4306
4307 s = bfd_get_section_by_name (dynobj, ".dynbss");
4308 BFD_ASSERT (s != NULL);
4309
4310 /* We must generate a R_MN10300_COPY reloc to tell the dynamic linker to
4311 copy the initial value out of the dynamic object and into the
4312 runtime process image. We need to remember the offset into the
4313 .rela.bss section we are going to use. */
4314 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4315 {
4316 asection * srel;
4317
4318 srel = bfd_get_section_by_name (dynobj, ".rela.bss");
4319 BFD_ASSERT (srel != NULL);
4320 srel->_raw_size += sizeof (Elf32_External_Rela);
4321 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
4322 }
4323
4324 /* We need to figure out the alignment required for this symbol. I
4325 have no idea how ELF linkers handle this. */
4326 power_of_two = bfd_log2 (h->size);
4327 if (power_of_two > 3)
4328 power_of_two = 3;
4329
4330 /* Apply the required alignment. */
4331 s->_raw_size = BFD_ALIGN (s->_raw_size,
4332 (bfd_size_type) (1 << power_of_two));
4333 if (power_of_two > bfd_get_section_alignment (dynobj, s))
4334 {
4335 if (! bfd_set_section_alignment (dynobj, s, power_of_two))
4336 return FALSE;
4337 }
4338
4339 /* Define the symbol as being at this point in the section. */
4340 h->root.u.def.section = s;
4341 h->root.u.def.value = s->_raw_size;
4342
4343 /* Increment the section size to make room for the symbol. */
4344 s->_raw_size += h->size;
4345
4346 return TRUE;
4347 }
4348
4349 /* This function is called via elf32_mn10300_link_hash_traverse if we are
4350 creating a shared object with -Bsymbolic. It discards the space
4351 allocated to copy PC relative relocs against symbols which are
4352 defined in regular objects. We allocated space for them in the
4353 check_relocs routine, but we won't fill them in in the
4354 relocate_section routine. */
4355
4356 static bfd_boolean
4357 _bfd_mn10300_elf_discard_copies (h, info)
4358 struct elf32_mn10300_link_hash_entry *h;
4359 struct bfd_link_info *info;
4360 {
4361 struct elf_mn10300_pcrel_relocs_copied *s;
4362
4363 /* If a symbol has been forced local or we have found a regular
4364 definition for the symbolic link case, then we won't be needing
4365 any relocs. */
4366 if ((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
4367 && ((h->root.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0
4368 || info->symbolic))
4369 {
4370 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
4371 s->section->_raw_size -= s->count * sizeof (Elf32_External_Rel);
4372 }
4373
4374 return TRUE;
4375 }
4376
4377 /* Set the sizes of the dynamic sections. */
4378
4379 static bfd_boolean
4380 _bfd_mn10300_elf_size_dynamic_sections (output_bfd, info)
4381 bfd * output_bfd;
4382 struct bfd_link_info * info;
4383 {
4384 bfd * dynobj;
4385 asection * s;
4386 bfd_boolean plt;
4387 bfd_boolean relocs;
4388 bfd_boolean reltext;
4389
4390 dynobj = elf_hash_table (info)->dynobj;
4391 BFD_ASSERT (dynobj != NULL);
4392
4393 if (elf_hash_table (info)->dynamic_sections_created)
4394 {
4395 /* Set the contents of the .interp section to the interpreter. */
4396 if (info->executable)
4397 {
4398 s = bfd_get_section_by_name (dynobj, ".interp");
4399 BFD_ASSERT (s != NULL);
4400 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
4401 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
4402 }
4403 }
4404 else
4405 {
4406 /* We may have created entries in the .rela.got section.
4407 However, if we are not creating the dynamic sections, we will
4408 not actually use these entries. Reset the size of .rela.got,
4409 which will cause it to get stripped from the output file
4410 below. */
4411 s = bfd_get_section_by_name (dynobj, ".rela.got");
4412 if (s != NULL)
4413 s->_raw_size = 0;
4414 }
4415
4416 /* If this is a -Bsymbolic shared link, then we need to discard all
4417 PC relative relocs against symbols defined in a regular object.
4418 We allocated space for them in the check_relocs routine, but we
4419 will not fill them in in the relocate_section routine. */
4420 if (info->shared && info->symbolic)
4421 elf32_mn10300_link_hash_traverse (elf32_mn10300_hash_table (info),
4422 _bfd_mn10300_elf_discard_copies,
4423 info);
4424
4425 /* The check_relocs and adjust_dynamic_symbol entry points have
4426 determined the sizes of the various dynamic sections. Allocate
4427 memory for them. */
4428 plt = FALSE;
4429 relocs = FALSE;
4430 reltext = FALSE;
4431 for (s = dynobj->sections; s != NULL; s = s->next)
4432 {
4433 const char * name;
4434 bfd_boolean strip;
4435
4436 if ((s->flags & SEC_LINKER_CREATED) == 0)
4437 continue;
4438
4439 /* It's OK to base decisions on the section name, because none
4440 of the dynobj section names depend upon the input files. */
4441 name = bfd_get_section_name (dynobj, s);
4442
4443 strip = FALSE;
4444
4445 if (strcmp (name, ".plt") == 0)
4446 {
4447 if (s->_raw_size == 0)
4448 /* Strip this section if we don't need it; see the
4449 comment below. */
4450 strip = TRUE;
4451 else
4452 /* Remember whether there is a PLT. */
4453 plt = TRUE;
4454 }
4455 else if (strncmp (name, ".rela", 5) == 0)
4456 {
4457 if (s->_raw_size == 0)
4458 {
4459 /* If we don't need this section, strip it from the
4460 output file. This is mostly to handle .rela.bss and
4461 .rela.plt. We must create both sections in
4462 create_dynamic_sections, because they must be created
4463 before the linker maps input sections to output
4464 sections. The linker does that before
4465 adjust_dynamic_symbol is called, and it is that
4466 function which decides whether anything needs to go
4467 into these sections. */
4468 strip = TRUE;
4469 }
4470 else
4471 {
4472 asection * target;
4473
4474 /* Remember whether there are any reloc sections other
4475 than .rela.plt. */
4476 if (strcmp (name, ".rela.plt") != 0)
4477 {
4478 const char * outname;
4479
4480 relocs = TRUE;
4481
4482 /* If this relocation section applies to a read only
4483 section, then we probably need a DT_TEXTREL
4484 entry. The entries in the .rela.plt section
4485 really apply to the .got section, which we
4486 created ourselves and so know is not readonly. */
4487 outname = bfd_get_section_name (output_bfd,
4488 s->output_section);
4489 target = bfd_get_section_by_name (output_bfd, outname + 5);
4490 if (target != NULL
4491 && (target->flags & SEC_READONLY) != 0
4492 && (target->flags & SEC_ALLOC) != 0)
4493 reltext = TRUE;
4494 }
4495
4496 /* We use the reloc_count field as a counter if we need
4497 to copy relocs into the output file. */
4498 s->reloc_count = 0;
4499 }
4500 }
4501 else if (strncmp (name, ".got", 4) != 0)
4502 /* It's not one of our sections, so don't allocate space. */
4503 continue;
4504
4505 if (strip)
4506 {
4507 _bfd_strip_section_from_output (info, s);
4508 continue;
4509 }
4510
4511 /* Allocate memory for the section contents. We use bfd_zalloc
4512 here in case unused entries are not reclaimed before the
4513 section's contents are written out. This should not happen,
4514 but this way if it does, we get a R_MN10300_NONE reloc
4515 instead of garbage. */
4516 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
4517 if (s->contents == NULL && s->_raw_size != 0)
4518 return FALSE;
4519 }
4520
4521 if (elf_hash_table (info)->dynamic_sections_created)
4522 {
4523 /* Add some entries to the .dynamic section. We fill in the
4524 values later, in _bfd_mn10300_elf_finish_dynamic_sections,
4525 but we must add the entries now so that we get the correct
4526 size for the .dynamic section. The DT_DEBUG entry is filled
4527 in by the dynamic linker and used by the debugger. */
4528 if (! info->shared)
4529 {
4530 if (!_bfd_elf_add_dynamic_entry (info, DT_DEBUG, 0))
4531 return FALSE;
4532 }
4533
4534 if (plt)
4535 {
4536 if (!_bfd_elf_add_dynamic_entry (info, DT_PLTGOT, 0)
4537 || !_bfd_elf_add_dynamic_entry (info, DT_PLTRELSZ, 0)
4538 || !_bfd_elf_add_dynamic_entry (info, DT_PLTREL, DT_RELA)
4539 || !_bfd_elf_add_dynamic_entry (info, DT_JMPREL, 0))
4540 return FALSE;
4541 }
4542
4543 if (relocs)
4544 {
4545 if (!_bfd_elf_add_dynamic_entry (info, DT_RELA, 0)
4546 || !_bfd_elf_add_dynamic_entry (info, DT_RELASZ, 0)
4547 || !_bfd_elf_add_dynamic_entry (info, DT_RELAENT,
4548 sizeof (Elf32_External_Rela)))
4549 return FALSE;
4550 }
4551
4552 if (reltext)
4553 {
4554 if (!_bfd_elf_add_dynamic_entry (info, DT_TEXTREL, 0))
4555 return FALSE;
4556 }
4557 }
4558
4559 return TRUE;
4560 }
4561
4562 /* Finish up dynamic symbol handling. We set the contents of various
4563 dynamic sections here. */
4564
4565 static bfd_boolean
4566 _bfd_mn10300_elf_finish_dynamic_symbol (output_bfd, info, h, sym)
4567 bfd * output_bfd;
4568 struct bfd_link_info * info;
4569 struct elf_link_hash_entry * h;
4570 Elf_Internal_Sym * sym;
4571 {
4572 bfd * dynobj;
4573
4574 dynobj = elf_hash_table (info)->dynobj;
4575
4576 if (h->plt.offset != (bfd_vma) -1)
4577 {
4578 asection * splt;
4579 asection * sgot;
4580 asection * srel;
4581 bfd_vma plt_index;
4582 bfd_vma got_offset;
4583 Elf_Internal_Rela rel;
4584
4585 /* This symbol has an entry in the procedure linkage table. Set
4586 it up. */
4587
4588 BFD_ASSERT (h->dynindx != -1);
4589
4590 splt = bfd_get_section_by_name (dynobj, ".plt");
4591 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
4592 srel = bfd_get_section_by_name (dynobj, ".rela.plt");
4593 BFD_ASSERT (splt != NULL && sgot != NULL && srel != NULL);
4594
4595 /* Get the index in the procedure linkage table which
4596 corresponds to this symbol. This is the index of this symbol
4597 in all the symbols for which we are making plt entries. The
4598 first entry in the procedure linkage table is reserved. */
4599 plt_index = ((h->plt.offset - elf_mn10300_sizeof_plt0 (info))
4600 / elf_mn10300_sizeof_plt (info));
4601
4602 /* Get the offset into the .got table of the entry that
4603 corresponds to this function. Each .got entry is 4 bytes.
4604 The first three are reserved. */
4605 got_offset = (plt_index + 3) * 4;
4606
4607 /* Fill in the entry in the procedure linkage table. */
4608 if (! info->shared)
4609 {
4610 memcpy (splt->contents + h->plt.offset, elf_mn10300_plt_entry,
4611 elf_mn10300_sizeof_plt (info));
4612 bfd_put_32 (output_bfd,
4613 (sgot->output_section->vma
4614 + sgot->output_offset
4615 + got_offset),
4616 (splt->contents + h->plt.offset
4617 + elf_mn10300_plt_symbol_offset (info)));
4618
4619 bfd_put_32 (output_bfd,
4620 (1 - h->plt.offset - elf_mn10300_plt_plt0_offset (info)),
4621 (splt->contents + h->plt.offset
4622 + elf_mn10300_plt_plt0_offset (info)));
4623 }
4624 else
4625 {
4626 memcpy (splt->contents + h->plt.offset, elf_mn10300_pic_plt_entry,
4627 elf_mn10300_sizeof_plt (info));
4628
4629 bfd_put_32 (output_bfd, got_offset,
4630 (splt->contents + h->plt.offset
4631 + elf_mn10300_plt_symbol_offset (info)));
4632 }
4633
4634 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
4635 (splt->contents + h->plt.offset
4636 + elf_mn10300_plt_reloc_offset (info)));
4637
4638 /* Fill in the entry in the global offset table. */
4639 bfd_put_32 (output_bfd,
4640 (splt->output_section->vma
4641 + splt->output_offset
4642 + h->plt.offset
4643 + elf_mn10300_plt_temp_offset (info)),
4644 sgot->contents + got_offset);
4645
4646 /* Fill in the entry in the .rela.plt section. */
4647 rel.r_offset = (sgot->output_section->vma
4648 + sgot->output_offset
4649 + got_offset);
4650 rel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_JMP_SLOT);
4651 rel.r_addend = 0;
4652 bfd_elf32_swap_reloca_out (output_bfd, &rel,
4653 (bfd_byte *) ((Elf32_External_Rela *) srel->contents
4654 + plt_index));
4655
4656 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
4657 /* Mark the symbol as undefined, rather than as defined in
4658 the .plt section. Leave the value alone. */
4659 sym->st_shndx = SHN_UNDEF;
4660 }
4661
4662 if (h->got.offset != (bfd_vma) -1)
4663 {
4664 asection * sgot;
4665 asection * srel;
4666 Elf_Internal_Rela rel;
4667
4668 /* This symbol has an entry in the global offset table. Set it up. */
4669
4670 sgot = bfd_get_section_by_name (dynobj, ".got");
4671 srel = bfd_get_section_by_name (dynobj, ".rela.got");
4672 BFD_ASSERT (sgot != NULL && srel != NULL);
4673
4674 rel.r_offset = (sgot->output_section->vma
4675 + sgot->output_offset
4676 + (h->got.offset &~ 1));
4677
4678 /* If this is a -Bsymbolic link, and the symbol is defined
4679 locally, we just want to emit a RELATIVE reloc. Likewise if
4680 the symbol was forced to be local because of a version file.
4681 The entry in the global offset table will already have been
4682 initialized in the relocate_section function. */
4683 if (info->shared
4684 && (info->symbolic || h->dynindx == -1)
4685 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
4686 {
4687 rel.r_info = ELF32_R_INFO (0, R_MN10300_RELATIVE);
4688 rel.r_addend = (h->root.u.def.value
4689 + h->root.u.def.section->output_section->vma
4690 + h->root.u.def.section->output_offset);
4691 }
4692 else
4693 {
4694 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
4695 rel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_GLOB_DAT);
4696 rel.r_addend = 0;
4697 }
4698
4699 bfd_elf32_swap_reloca_out (output_bfd, &rel,
4700 (bfd_byte *) ((Elf32_External_Rela *) srel->contents
4701 + srel->reloc_count));
4702 ++ srel->reloc_count;
4703 }
4704
4705 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
4706 {
4707 asection * s;
4708 Elf_Internal_Rela rel;
4709
4710 /* This symbol needs a copy reloc. Set it up. */
4711 BFD_ASSERT (h->dynindx != -1
4712 && (h->root.type == bfd_link_hash_defined
4713 || h->root.type == bfd_link_hash_defweak));
4714
4715 s = bfd_get_section_by_name (h->root.u.def.section->owner,
4716 ".rela.bss");
4717 BFD_ASSERT (s != NULL);
4718
4719 rel.r_offset = (h->root.u.def.value
4720 + h->root.u.def.section->output_section->vma
4721 + h->root.u.def.section->output_offset);
4722 rel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_COPY);
4723 rel.r_addend = 0;
4724 bfd_elf32_swap_reloca_out (output_bfd, &rel,
4725 (bfd_byte *) ((Elf32_External_Rela *) s->contents
4726 + s->reloc_count));
4727 ++ s->reloc_count;
4728 }
4729
4730 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
4731 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
4732 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
4733 sym->st_shndx = SHN_ABS;
4734
4735 return TRUE;
4736 }
4737
4738 /* Finish up the dynamic sections. */
4739
4740 static bfd_boolean
4741 _bfd_mn10300_elf_finish_dynamic_sections (output_bfd, info)
4742 bfd * output_bfd;
4743 struct bfd_link_info * info;
4744 {
4745 bfd * dynobj;
4746 asection * sgot;
4747 asection * sdyn;
4748
4749 dynobj = elf_hash_table (info)->dynobj;
4750
4751 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
4752 BFD_ASSERT (sgot != NULL);
4753 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
4754
4755 if (elf_hash_table (info)->dynamic_sections_created)
4756 {
4757 asection * splt;
4758 Elf32_External_Dyn * dyncon;
4759 Elf32_External_Dyn * dynconend;
4760
4761 BFD_ASSERT (sdyn != NULL);
4762
4763 dyncon = (Elf32_External_Dyn *) sdyn->contents;
4764 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
4765
4766 for (; dyncon < dynconend; dyncon++)
4767 {
4768 Elf_Internal_Dyn dyn;
4769 const char * name;
4770 asection * s;
4771
4772 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4773
4774 switch (dyn.d_tag)
4775 {
4776 default:
4777 break;
4778
4779 case DT_PLTGOT:
4780 name = ".got";
4781 goto get_vma;
4782
4783 case DT_JMPREL:
4784 name = ".rela.plt";
4785 get_vma:
4786 s = bfd_get_section_by_name (output_bfd, name);
4787 BFD_ASSERT (s != NULL);
4788 dyn.d_un.d_ptr = s->vma;
4789 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4790 break;
4791
4792 case DT_PLTRELSZ:
4793 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
4794 BFD_ASSERT (s != NULL);
4795 if (s->_cooked_size != 0)
4796 dyn.d_un.d_val = s->_cooked_size;
4797 else
4798 dyn.d_un.d_val = s->_raw_size;
4799 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4800 break;
4801
4802 case DT_RELASZ:
4803 /* My reading of the SVR4 ABI indicates that the
4804 procedure linkage table relocs (DT_JMPREL) should be
4805 included in the overall relocs (DT_RELA). This is
4806 what Solaris does. However, UnixWare can not handle
4807 that case. Therefore, we override the DT_RELASZ entry
4808 here to make it not include the JMPREL relocs. Since
4809 the linker script arranges for .rela.plt to follow all
4810 other relocation sections, we don't have to worry
4811 about changing the DT_RELA entry. */
4812 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
4813 if (s != NULL)
4814 {
4815 if (s->_cooked_size != 0)
4816 dyn.d_un.d_val -= s->_cooked_size;
4817 else
4818 dyn.d_un.d_val -= s->_raw_size;
4819 }
4820 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4821 break;
4822 }
4823 }
4824
4825 /* Fill in the first entry in the procedure linkage table. */
4826 splt = bfd_get_section_by_name (dynobj, ".plt");
4827 if (splt && splt->_raw_size > 0)
4828 {
4829 if (info->shared)
4830 {
4831 memcpy (splt->contents, elf_mn10300_pic_plt_entry,
4832 elf_mn10300_sizeof_plt (info));
4833 }
4834 else
4835 {
4836 memcpy (splt->contents, elf_mn10300_plt0_entry, PLT0_ENTRY_SIZE);
4837 bfd_put_32 (output_bfd,
4838 sgot->output_section->vma + sgot->output_offset + 4,
4839 splt->contents + elf_mn10300_plt0_gotid_offset (info));
4840 bfd_put_32 (output_bfd,
4841 sgot->output_section->vma + sgot->output_offset + 8,
4842 splt->contents + elf_mn10300_plt0_linker_offset (info));
4843 }
4844
4845 /* UnixWare sets the entsize of .plt to 4, although that doesn't
4846 really seem like the right value. */
4847 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
4848 }
4849 }
4850
4851 /* Fill in the first three entries in the global offset table. */
4852 if (sgot->_raw_size > 0)
4853 {
4854 if (sdyn == NULL)
4855 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
4856 else
4857 bfd_put_32 (output_bfd,
4858 sdyn->output_section->vma + sdyn->output_offset,
4859 sgot->contents);
4860 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
4861 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
4862 }
4863
4864 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
4865
4866 return TRUE;
4867 }
4868
4869 /* Classify relocation types, such that combreloc can sort them
4870 properly. */
4871
4872 static enum elf_reloc_type_class
4873 _bfd_mn10300_elf_reloc_type_class (const Elf_Internal_Rela *rela)
4874 {
4875 switch ((int) ELF32_R_TYPE (rela->r_info))
4876 {
4877 case R_MN10300_RELATIVE:
4878 return reloc_class_relative;
4879 case R_MN10300_JMP_SLOT:
4880 return reloc_class_plt;
4881 case R_MN10300_COPY:
4882 return reloc_class_copy;
4883 default:
4884 return reloc_class_normal;
4885 }
4886 }
4887
4888 #ifndef ELF_ARCH
4889 #define TARGET_LITTLE_SYM bfd_elf32_mn10300_vec
4890 #define TARGET_LITTLE_NAME "elf32-mn10300"
4891 #define ELF_ARCH bfd_arch_mn10300
4892 #define ELF_MACHINE_CODE EM_MN10300
4893 #define ELF_MACHINE_ALT1 EM_CYGNUS_MN10300
4894 #define ELF_MAXPAGESIZE 0x1000
4895 #endif
4896
4897 #define elf_info_to_howto mn10300_info_to_howto
4898 #define elf_info_to_howto_rel 0
4899 #define elf_backend_can_gc_sections 1
4900 #define elf_backend_rela_normal 1
4901 #define elf_backend_check_relocs mn10300_elf_check_relocs
4902 #define elf_backend_gc_mark_hook mn10300_elf_gc_mark_hook
4903 #define elf_backend_relocate_section mn10300_elf_relocate_section
4904 #define bfd_elf32_bfd_relax_section mn10300_elf_relax_section
4905 #define bfd_elf32_bfd_get_relocated_section_contents \
4906 mn10300_elf_get_relocated_section_contents
4907 #define bfd_elf32_bfd_link_hash_table_create \
4908 elf32_mn10300_link_hash_table_create
4909 #define bfd_elf32_bfd_link_hash_table_free \
4910 elf32_mn10300_link_hash_table_free
4911
4912 #ifndef elf_symbol_leading_char
4913 #define elf_symbol_leading_char '_'
4914 #endif
4915
4916 /* So we can set bits in e_flags. */
4917 #define elf_backend_final_write_processing \
4918 _bfd_mn10300_elf_final_write_processing
4919 #define elf_backend_object_p _bfd_mn10300_elf_object_p
4920
4921 #define bfd_elf32_bfd_merge_private_bfd_data \
4922 _bfd_mn10300_elf_merge_private_bfd_data
4923
4924 #define elf_backend_can_gc_sections 1
4925 #define elf_backend_create_dynamic_sections \
4926 _bfd_mn10300_elf_create_dynamic_sections
4927 #define elf_backend_adjust_dynamic_symbol \
4928 _bfd_mn10300_elf_adjust_dynamic_symbol
4929 #define elf_backend_size_dynamic_sections \
4930 _bfd_mn10300_elf_size_dynamic_sections
4931 #define elf_backend_finish_dynamic_symbol \
4932 _bfd_mn10300_elf_finish_dynamic_symbol
4933 #define elf_backend_finish_dynamic_sections \
4934 _bfd_mn10300_elf_finish_dynamic_sections
4935
4936 #define elf_backend_reloc_type_class \
4937 _bfd_mn10300_elf_reloc_type_class
4938
4939 #define elf_backend_want_got_plt 1
4940 #define elf_backend_plt_readonly 1
4941 #define elf_backend_want_plt_sym 0
4942 #define elf_backend_got_header_size 12
4943
4944 #include "elf32-target.h"
GDB Binutils - Deliverables
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