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* ldgram.y (lang_memory_region_type): Make static.
[binutils.git] / bfd / elf-m10300.c
blob5faa0e2b3902f503e61f7297570d8d1c3e76c20c
1 /* Matsushita 10300 specific support for 32-bit ELF
2 Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
3 Free Software Foundation, Inc.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 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 struct elf32_mn10300_link_hash_entry {
56 /* The basic elf link hash table entry. */
57 struct elf_link_hash_entry root;
58
59 /* For function symbols, the number of times this function is
60 called directly (ie by name). */
61 unsigned int direct_calls;
62
63 /* For function symbols, the size of this function's stack
64 (if <= 255 bytes). We stuff this into "call" instructions
65 to this target when it's valid and profitable to do so.
66
67 This does not include stack allocated by movm! */
68 unsigned char stack_size;
69
70 /* For function symbols, arguments (if any) for movm instruction
71 in the prologue. We stuff this value into "call" instructions
72 to the target when it's valid and profitable to do so. */
73 unsigned char movm_args;
74
75 /* For function symbols, the amount of stack space that would be allocated
76 by the movm instruction. This is redundant with movm_args, but we
77 add it to the hash table to avoid computing it over and over. */
78 unsigned char movm_stack_size;
79
80 /* When set, convert all "call" instructions to this target into "calls"
81 instructions. */
82 #define MN10300_CONVERT_CALL_TO_CALLS 0x1
83
84 /* Used to mark functions which have had redundant parts of their
85 prologue deleted. */
86 #define MN10300_DELETED_PROLOGUE_BYTES 0x2
87 unsigned char flags;
88 };
89
90 /* We derive a hash table from the main elf linker hash table so
91 we can store state variables and a secondary hash table without
92 resorting to global variables. */
93 struct elf32_mn10300_link_hash_table {
94 /* The main hash table. */
95 struct elf_link_hash_table root;
96
97 /* A hash table for static functions. We could derive a new hash table
98 instead of using the full elf32_mn10300_link_hash_table if we wanted
99 to save some memory. */
100 struct elf32_mn10300_link_hash_table *static_hash_table;
101
102 /* Random linker state flags. */
103 #define MN10300_HASH_ENTRIES_INITIALIZED 0x1
104 char flags;
105 };
106
107 /* For MN10300 linker hash table. */
108
109 /* Get the MN10300 ELF linker hash table from a link_info structure. */
110
111 #define elf32_mn10300_hash_table(p) \
112 ((struct elf32_mn10300_link_hash_table *) ((p)->hash))
113
114 #define elf32_mn10300_link_hash_traverse(table, func, info) \
115 (elf_link_hash_traverse \
116 (&(table)->root, \
117 (bfd_boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
118 (info)))
119
120 static struct bfd_hash_entry *elf32_mn10300_link_hash_newfunc
121 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
122 static struct bfd_link_hash_table *elf32_mn10300_link_hash_table_create
123 PARAMS ((bfd *));
124 static void elf32_mn10300_link_hash_table_free
125 PARAMS ((struct bfd_link_hash_table *));
126
127 static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
128 PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
129 static void mn10300_info_to_howto
130 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
131 static bfd_boolean mn10300_elf_check_relocs
132 PARAMS ((bfd *, struct bfd_link_info *, asection *,
133 const Elf_Internal_Rela *));
134 static asection *mn10300_elf_gc_mark_hook
135 PARAMS ((asection *, struct bfd_link_info *info, Elf_Internal_Rela *,
136 struct elf_link_hash_entry *, Elf_Internal_Sym *));
137 static bfd_boolean mn10300_elf_relax_delete_bytes
138 PARAMS ((bfd *, asection *, bfd_vma, int));
139 static bfd_boolean mn10300_elf_symbol_address_p
140 PARAMS ((bfd *, asection *, Elf_Internal_Sym *, bfd_vma));
141 static bfd_boolean elf32_mn10300_finish_hash_table_entry
142 PARAMS ((struct bfd_hash_entry *, PTR));
143 static void compute_function_info
144 PARAMS ((bfd *, struct elf32_mn10300_link_hash_entry *,
145 bfd_vma, unsigned char *));
146
147 static bfd_boolean _bfd_mn10300_elf_create_got_section
148 PARAMS ((bfd *, struct bfd_link_info *));
149 static bfd_boolean _bfd_mn10300_elf_create_dynamic_sections
150 PARAMS ((bfd *, struct bfd_link_info *));
151 static bfd_boolean _bfd_mn10300_elf_adjust_dynamic_symbol
152 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
153 static bfd_boolean _bfd_mn10300_elf_size_dynamic_sections
154 PARAMS ((bfd *, struct bfd_link_info *));
155 static bfd_boolean _bfd_mn10300_elf_finish_dynamic_symbol
156 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
157 Elf_Internal_Sym *));
158 static bfd_boolean _bfd_mn10300_elf_finish_dynamic_sections
159 PARAMS ((bfd *, struct bfd_link_info *));
160
161 static reloc_howto_type elf_mn10300_howto_table[] = {
162 /* Dummy relocation. Does nothing. */
163 HOWTO (R_MN10300_NONE,
164 0,
165 2,
166 16,
167 FALSE,
168 0,
169 complain_overflow_bitfield,
170 bfd_elf_generic_reloc,
171 "R_MN10300_NONE",
172 FALSE,
173 0,
174 0,
175 FALSE),
176 /* Standard 32 bit reloc. */
177 HOWTO (R_MN10300_32,
178 0,
179 2,
180 32,
181 FALSE,
182 0,
183 complain_overflow_bitfield,
184 bfd_elf_generic_reloc,
185 "R_MN10300_32",
186 FALSE,
187 0xffffffff,
188 0xffffffff,
189 FALSE),
190 /* Standard 16 bit reloc. */
191 HOWTO (R_MN10300_16,
192 0,
193 1,
194 16,
195 FALSE,
196 0,
197 complain_overflow_bitfield,
198 bfd_elf_generic_reloc,
199 "R_MN10300_16",
200 FALSE,
201 0xffff,
202 0xffff,
203 FALSE),
204 /* Standard 8 bit reloc. */
205 HOWTO (R_MN10300_8,
206 0,
207 0,
208 8,
209 FALSE,
210 0,
211 complain_overflow_bitfield,
212 bfd_elf_generic_reloc,
213 "R_MN10300_8",
214 FALSE,
215 0xff,
216 0xff,
217 FALSE),
218 /* Standard 32bit pc-relative reloc. */
219 HOWTO (R_MN10300_PCREL32,
220 0,
221 2,
222 32,
223 TRUE,
224 0,
225 complain_overflow_bitfield,
226 bfd_elf_generic_reloc,
227 "R_MN10300_PCREL32",
228 FALSE,
229 0xffffffff,
230 0xffffffff,
231 TRUE),
232 /* Standard 16bit pc-relative reloc. */
233 HOWTO (R_MN10300_PCREL16,
234 0,
235 1,
236 16,
237 TRUE,
238 0,
239 complain_overflow_bitfield,
240 bfd_elf_generic_reloc,
241 "R_MN10300_PCREL16",
242 FALSE,
243 0xffff,
244 0xffff,
245 TRUE),
246 /* Standard 8 pc-relative reloc. */
247 HOWTO (R_MN10300_PCREL8,
248 0,
249 0,
250 8,
251 TRUE,
252 0,
253 complain_overflow_bitfield,
254 bfd_elf_generic_reloc,
255 "R_MN10300_PCREL8",
256 FALSE,
257 0xff,
258 0xff,
259 TRUE),
260
261 /* GNU extension to record C++ vtable hierarchy */
262 HOWTO (R_MN10300_GNU_VTINHERIT, /* type */
263 0, /* rightshift */
264 0, /* size (0 = byte, 1 = short, 2 = long) */
265 0, /* bitsize */
266 FALSE, /* pc_relative */
267 0, /* bitpos */
268 complain_overflow_dont, /* complain_on_overflow */
269 NULL, /* special_function */
270 "R_MN10300_GNU_VTINHERIT", /* name */
271 FALSE, /* partial_inplace */
272 0, /* src_mask */
273 0, /* dst_mask */
274 FALSE), /* pcrel_offset */
275
276 /* GNU extension to record C++ vtable member usage */
277 HOWTO (R_MN10300_GNU_VTENTRY, /* type */
278 0, /* rightshift */
279 0, /* size (0 = byte, 1 = short, 2 = long) */
280 0, /* bitsize */
281 FALSE, /* pc_relative */
282 0, /* bitpos */
283 complain_overflow_dont, /* complain_on_overflow */
284 NULL, /* special_function */
285 "R_MN10300_GNU_VTENTRY", /* name */
286 FALSE, /* partial_inplace */
287 0, /* src_mask */
288 0, /* dst_mask */
289 FALSE), /* pcrel_offset */
290
291 /* Standard 24 bit reloc. */
292 HOWTO (R_MN10300_24,
293 0,
294 2,
295 24,
296 FALSE,
297 0,
298 complain_overflow_bitfield,
299 bfd_elf_generic_reloc,
300 "R_MN10300_24",
301 FALSE,
302 0xffffff,
303 0xffffff,
304 FALSE),
305 HOWTO (R_MN10300_GOTPC32, /* type */
306 0, /* rightshift */
307 2, /* size (0 = byte, 1 = short, 2 = long) */
308 32, /* bitsize */
309 TRUE, /* pc_relative */
310 0, /* bitpos */
311 complain_overflow_bitfield, /* complain_on_overflow */
312 bfd_elf_generic_reloc, /* */
313 "R_MN10300_GOTPC32", /* name */
314 FALSE, /* partial_inplace */
315 0xffffffff, /* src_mask */
316 0xffffffff, /* dst_mask */
317 TRUE), /* pcrel_offset */
318
319 HOWTO (R_MN10300_GOTPC16, /* type */
320 0, /* rightshift */
321 1, /* size (0 = byte, 1 = short, 2 = long) */
322 16, /* bitsize */
323 TRUE, /* pc_relative */
324 0, /* bitpos */
325 complain_overflow_bitfield, /* complain_on_overflow */
326 bfd_elf_generic_reloc, /* */
327 "R_MN10300_GOTPC16", /* name */
328 FALSE, /* partial_inplace */
329 0xffff, /* src_mask */
330 0xffff, /* dst_mask */
331 TRUE), /* pcrel_offset */
332
333 HOWTO (R_MN10300_GOTOFF32, /* type */
334 0, /* rightshift */
335 2, /* size (0 = byte, 1 = short, 2 = long) */
336 32, /* bitsize */
337 FALSE, /* pc_relative */
338 0, /* bitpos */
339 complain_overflow_bitfield, /* complain_on_overflow */
340 bfd_elf_generic_reloc, /* */
341 "R_MN10300_GOTOFF32", /* name */
342 FALSE, /* partial_inplace */
343 0xffffffff, /* src_mask */
344 0xffffffff, /* dst_mask */
345 FALSE), /* pcrel_offset */
346
347 HOWTO (R_MN10300_GOTOFF24, /* type */
348 0, /* rightshift */
349 2, /* size (0 = byte, 1 = short, 2 = long) */
350 24, /* bitsize */
351 FALSE, /* pc_relative */
352 0, /* bitpos */
353 complain_overflow_bitfield, /* complain_on_overflow */
354 bfd_elf_generic_reloc, /* */
355 "R_MN10300_GOTOFF24", /* name */
356 FALSE, /* partial_inplace */
357 0xffffff, /* src_mask */
358 0xffffff, /* dst_mask */
359 FALSE), /* pcrel_offset */
360
361 HOWTO (R_MN10300_GOTOFF16, /* type */
362 0, /* rightshift */
363 1, /* size (0 = byte, 1 = short, 2 = long) */
364 16, /* bitsize */
365 FALSE, /* pc_relative */
366 0, /* bitpos */
367 complain_overflow_bitfield, /* complain_on_overflow */
368 bfd_elf_generic_reloc, /* */
369 "R_MN10300_GOTOFF16", /* name */
370 FALSE, /* partial_inplace */
371 0xffff, /* src_mask */
372 0xffff, /* dst_mask */
373 FALSE), /* pcrel_offset */
374
375 HOWTO (R_MN10300_PLT32, /* type */
376 0, /* rightshift */
377 2, /* size (0 = byte, 1 = short, 2 = long) */
378 32, /* bitsize */
379 TRUE, /* pc_relative */
380 0, /* bitpos */
381 complain_overflow_bitfield, /* complain_on_overflow */
382 bfd_elf_generic_reloc, /* */
383 "R_MN10300_PLT32", /* name */
384 FALSE, /* partial_inplace */
385 0xffffffff, /* src_mask */
386 0xffffffff, /* dst_mask */
387 TRUE), /* pcrel_offset */
388
389 HOWTO (R_MN10300_PLT16, /* type */
390 0, /* rightshift */
391 1, /* size (0 = byte, 1 = short, 2 = long) */
392 16, /* bitsize */
393 TRUE, /* pc_relative */
394 0, /* bitpos */
395 complain_overflow_bitfield, /* complain_on_overflow */
396 bfd_elf_generic_reloc, /* */
397 "R_MN10300_PLT16", /* name */
398 FALSE, /* partial_inplace */
399 0xffff, /* src_mask */
400 0xffff, /* dst_mask */
401 TRUE), /* pcrel_offset */
402
403 HOWTO (R_MN10300_GOT32, /* type */
404 0, /* rightshift */
405 2, /* size (0 = byte, 1 = short, 2 = long) */
406 32, /* bitsize */
407 FALSE, /* pc_relative */
408 0, /* bitpos */
409 complain_overflow_bitfield, /* complain_on_overflow */
410 bfd_elf_generic_reloc, /* */
411 "R_MN10300_GOT32", /* name */
412 FALSE, /* partial_inplace */
413 0xffffffff, /* src_mask */
414 0xffffffff, /* dst_mask */
415 FALSE), /* pcrel_offset */
416
417 HOWTO (R_MN10300_GOT24, /* type */
418 0, /* rightshift */
419 2, /* size (0 = byte, 1 = short, 2 = long) */
420 24, /* bitsize */
421 FALSE, /* pc_relative */
422 0, /* bitpos */
423 complain_overflow_bitfield, /* complain_on_overflow */
424 bfd_elf_generic_reloc, /* */
425 "R_MN10300_GOT24", /* name */
426 FALSE, /* partial_inplace */
427 0xffffffff, /* src_mask */
428 0xffffffff, /* dst_mask */
429 FALSE), /* pcrel_offset */
430
431 HOWTO (R_MN10300_GOT16, /* type */
432 0, /* rightshift */
433 1, /* size (0 = byte, 1 = short, 2 = long) */
434 16, /* bitsize */
435 FALSE, /* pc_relative */
436 0, /* bitpos */
437 complain_overflow_bitfield, /* complain_on_overflow */
438 bfd_elf_generic_reloc, /* */
439 "R_MN10300_GOT16", /* name */
440 FALSE, /* partial_inplace */
441 0xffffffff, /* src_mask */
442 0xffffffff, /* dst_mask */
443 FALSE), /* pcrel_offset */
444
445 HOWTO (R_MN10300_COPY, /* type */
446 0, /* rightshift */
447 2, /* size (0 = byte, 1 = short, 2 = long) */
448 32, /* bitsize */
449 FALSE, /* pc_relative */
450 0, /* bitpos */
451 complain_overflow_bitfield, /* complain_on_overflow */
452 bfd_elf_generic_reloc, /* */
453 "R_MN10300_COPY", /* name */
454 FALSE, /* partial_inplace */
455 0xffffffff, /* src_mask */
456 0xffffffff, /* dst_mask */
457 FALSE), /* pcrel_offset */
458
459 HOWTO (R_MN10300_GLOB_DAT, /* type */
460 0, /* rightshift */
461 2, /* size (0 = byte, 1 = short, 2 = long) */
462 32, /* bitsize */
463 FALSE, /* pc_relative */
464 0, /* bitpos */
465 complain_overflow_bitfield, /* complain_on_overflow */
466 bfd_elf_generic_reloc, /* */
467 "R_MN10300_GLOB_DAT", /* name */
468 FALSE, /* partial_inplace */
469 0xffffffff, /* src_mask */
470 0xffffffff, /* dst_mask */
471 FALSE), /* pcrel_offset */
472
473 HOWTO (R_MN10300_JMP_SLOT, /* type */
474 0, /* rightshift */
475 2, /* size (0 = byte, 1 = short, 2 = long) */
476 32, /* bitsize */
477 FALSE, /* pc_relative */
478 0, /* bitpos */
479 complain_overflow_bitfield, /* complain_on_overflow */
480 bfd_elf_generic_reloc, /* */
481 "R_MN10300_JMP_SLOT", /* name */
482 FALSE, /* partial_inplace */
483 0xffffffff, /* src_mask */
484 0xffffffff, /* dst_mask */
485 FALSE), /* pcrel_offset */
486
487 HOWTO (R_MN10300_RELATIVE, /* type */
488 0, /* rightshift */
489 2, /* size (0 = byte, 1 = short, 2 = long) */
490 32, /* bitsize */
491 FALSE, /* pc_relative */
492 0, /* bitpos */
493 complain_overflow_bitfield, /* complain_on_overflow */
494 bfd_elf_generic_reloc, /* */
495 "R_MN10300_RELATIVE", /* name */
496 FALSE, /* partial_inplace */
497 0xffffffff, /* src_mask */
498 0xffffffff, /* dst_mask */
499 FALSE), /* pcrel_offset */
500
501 };
502
503 struct mn10300_reloc_map {
504 bfd_reloc_code_real_type bfd_reloc_val;
505 unsigned char elf_reloc_val;
506 };
507
508 static const struct mn10300_reloc_map mn10300_reloc_map[] = {
509 { BFD_RELOC_NONE, R_MN10300_NONE, },
510 { BFD_RELOC_32, R_MN10300_32, },
511 { BFD_RELOC_16, R_MN10300_16, },
512 { BFD_RELOC_8, R_MN10300_8, },
513 { BFD_RELOC_32_PCREL, R_MN10300_PCREL32, },
514 { BFD_RELOC_16_PCREL, R_MN10300_PCREL16, },
515 { BFD_RELOC_8_PCREL, R_MN10300_PCREL8, },
516 { BFD_RELOC_24, R_MN10300_24, },
517 { BFD_RELOC_VTABLE_INHERIT, R_MN10300_GNU_VTINHERIT },
518 { BFD_RELOC_VTABLE_ENTRY, R_MN10300_GNU_VTENTRY },
519 { BFD_RELOC_32_GOT_PCREL, R_MN10300_GOTPC32 },
520 { BFD_RELOC_16_GOT_PCREL, R_MN10300_GOTPC16 },
521 { BFD_RELOC_32_GOTOFF, R_MN10300_GOTOFF32 },
522 { BFD_RELOC_MN10300_GOTOFF24, R_MN10300_GOTOFF24 },
523 { BFD_RELOC_16_GOTOFF, R_MN10300_GOTOFF16 },
524 { BFD_RELOC_32_PLT_PCREL, R_MN10300_PLT32 },
525 { BFD_RELOC_16_PLT_PCREL, R_MN10300_PLT16 },
526 { BFD_RELOC_MN10300_GOT32, R_MN10300_GOT32 },
527 { BFD_RELOC_MN10300_GOT24, R_MN10300_GOT24 },
528 { BFD_RELOC_MN10300_GOT16, R_MN10300_GOT16 },
529 { BFD_RELOC_MN10300_COPY, R_MN10300_COPY },
530 { BFD_RELOC_MN10300_GLOB_DAT, R_MN10300_GLOB_DAT },
531 { BFD_RELOC_MN10300_JMP_SLOT, R_MN10300_JMP_SLOT },
532 { BFD_RELOC_MN10300_RELATIVE, R_MN10300_RELATIVE },
533 };
534
535 /* Create the GOT section. */
536
537 static bfd_boolean
538 _bfd_mn10300_elf_create_got_section (abfd, info)
539 bfd * abfd;
540 struct bfd_link_info * info;
541 {
542 flagword flags;
543 flagword pltflags;
544 asection * s;
545 struct bfd_link_hash_entry * bh;
546 struct elf_link_hash_entry * h;
547 const struct elf_backend_data * bed = get_elf_backend_data (abfd);
548 int ptralign;
549
550 /* This function may be called more than once. */
551 if (bfd_get_section_by_name (abfd, ".got") != NULL)
552 return TRUE;
553
554 switch (bed->s->arch_size)
555 {
556 case 32:
557 ptralign = 2;
558 break;
559
560 case 64:
561 ptralign = 3;
562 break;
563
564 default:
565 bfd_set_error (bfd_error_bad_value);
566 return FALSE;
567 }
568
569 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
570 | SEC_LINKER_CREATED);
571
572 pltflags = flags;
573 pltflags |= SEC_CODE;
574 if (bed->plt_not_loaded)
575 pltflags &= ~ (SEC_LOAD | SEC_HAS_CONTENTS);
576 if (bed->plt_readonly)
577 pltflags |= SEC_READONLY;
578
579 s = bfd_make_section (abfd, ".plt");
580 if (s == NULL
581 || ! bfd_set_section_flags (abfd, s, pltflags)
582 || ! bfd_set_section_alignment (abfd, s, bed->plt_alignment))
583 return FALSE;
584
585 if (bed->want_plt_sym)
586 {
587 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
588 .plt section. */
589 bh = NULL;
590 if (! (_bfd_generic_link_add_one_symbol
591 (info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s,
592 (bfd_vma) 0, (const char *) NULL, FALSE,
593 get_elf_backend_data (abfd)->collect, &bh)))
594 return FALSE;
595 h = (struct elf_link_hash_entry *) bh;
596 h->def_regular = 1;
597 h->type = STT_OBJECT;
598
599 if (info->shared
600 && ! bfd_elf_link_record_dynamic_symbol (info, h))
601 return FALSE;
602 }
603
604 s = bfd_make_section (abfd, ".got");
605 if (s == NULL
606 || ! bfd_set_section_flags (abfd, s, flags)
607 || ! bfd_set_section_alignment (abfd, s, ptralign))
608 return FALSE;
609
610 if (bed->want_got_plt)
611 {
612 s = bfd_make_section (abfd, ".got.plt");
613 if (s == NULL
614 || ! bfd_set_section_flags (abfd, s, flags)
615 || ! bfd_set_section_alignment (abfd, s, ptralign))
616 return FALSE;
617 }
618
619 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
620 (or .got.plt) section. We don't do this in the linker script
621 because we don't want to define the symbol if we are not creating
622 a global offset table. */
623 bh = NULL;
624 if (!(_bfd_generic_link_add_one_symbol
625 (info, abfd, "_GLOBAL_OFFSET_TABLE_", BSF_GLOBAL, s,
626 bed->got_symbol_offset, (const char *) NULL, FALSE,
627 bed->collect, &bh)))
628 return FALSE;
629 h = (struct elf_link_hash_entry *) bh;
630 h->def_regular = 1;
631 h->type = STT_OBJECT;
632
633 if (info->shared
634 && ! bfd_elf_link_record_dynamic_symbol (info, h))
635 return FALSE;
636
637 elf_hash_table (info)->hgot = h;
638
639 /* The first bit of the global offset table is the header. */
640 s->size += bed->got_header_size + bed->got_symbol_offset;
641
642 return TRUE;
643 }
644
645 static reloc_howto_type *
646 bfd_elf32_bfd_reloc_type_lookup (abfd, code)
647 bfd *abfd ATTRIBUTE_UNUSED;
648 bfd_reloc_code_real_type code;
649 {
650 unsigned int i;
651
652 for (i = 0;
653 i < sizeof (mn10300_reloc_map) / sizeof (struct mn10300_reloc_map);
654 i++)
655 {
656 if (mn10300_reloc_map[i].bfd_reloc_val == code)
657 return &elf_mn10300_howto_table[mn10300_reloc_map[i].elf_reloc_val];
658 }
659
660 return NULL;
661 }
662
663 /* Set the howto pointer for an MN10300 ELF reloc. */
664
665 static void
666 mn10300_info_to_howto (abfd, cache_ptr, dst)
667 bfd *abfd ATTRIBUTE_UNUSED;
668 arelent *cache_ptr;
669 Elf_Internal_Rela *dst;
670 {
671 unsigned int r_type;
672
673 r_type = ELF32_R_TYPE (dst->r_info);
674 BFD_ASSERT (r_type < (unsigned int) R_MN10300_MAX);
675 cache_ptr->howto = &elf_mn10300_howto_table[r_type];
676 }
677
678 /* Look through the relocs for a section during the first phase.
679 Since we don't do .gots or .plts, we just need to consider the
680 virtual table relocs for gc. */
681
682 static bfd_boolean
683 mn10300_elf_check_relocs (abfd, info, sec, relocs)
684 bfd *abfd;
685 struct bfd_link_info *info;
686 asection *sec;
687 const Elf_Internal_Rela *relocs;
688 {
689 Elf_Internal_Shdr *symtab_hdr;
690 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
691 const Elf_Internal_Rela *rel;
692 const Elf_Internal_Rela *rel_end;
693 bfd * dynobj;
694 bfd_vma * local_got_offsets;
695 asection * sgot;
696 asection * srelgot;
697 asection * sreloc;
698
699 sgot = NULL;
700 srelgot = NULL;
701 sreloc = NULL;
702
703 if (info->relocatable)
704 return TRUE;
705
706 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
707 sym_hashes = elf_sym_hashes (abfd);
708 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym);
709 if (!elf_bad_symtab (abfd))
710 sym_hashes_end -= symtab_hdr->sh_info;
711
712 dynobj = elf_hash_table (info)->dynobj;
713 local_got_offsets = elf_local_got_offsets (abfd);
714 rel_end = relocs + sec->reloc_count;
715 for (rel = relocs; rel < rel_end; rel++)
716 {
717 struct elf_link_hash_entry *h;
718 unsigned long r_symndx;
719
720 r_symndx = ELF32_R_SYM (rel->r_info);
721 if (r_symndx < symtab_hdr->sh_info)
722 h = NULL;
723 else
724 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
725
726 /* Some relocs require a global offset table. */
727 if (dynobj == NULL)
728 {
729 switch (ELF32_R_TYPE (rel->r_info))
730 {
731 case R_MN10300_GOT32:
732 case R_MN10300_GOT24:
733 case R_MN10300_GOT16:
734 case R_MN10300_GOTOFF32:
735 case R_MN10300_GOTOFF24:
736 case R_MN10300_GOTOFF16:
737 case R_MN10300_GOTPC32:
738 case R_MN10300_GOTPC16:
739 elf_hash_table (info)->dynobj = dynobj = abfd;
740 if (! _bfd_mn10300_elf_create_got_section (dynobj, info))
741 return FALSE;
742 break;
743
744 default:
745 break;
746 }
747 }
748
749 switch (ELF32_R_TYPE (rel->r_info))
750 {
751 /* This relocation describes the C++ object vtable hierarchy.
752 Reconstruct it for later use during GC. */
753 case R_MN10300_GNU_VTINHERIT:
754 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
755 return FALSE;
756 break;
757
758 /* This relocation describes which C++ vtable entries are actually
759 used. Record for later use during GC. */
760 case R_MN10300_GNU_VTENTRY:
761 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
762 return FALSE;
763 break;
764 case R_MN10300_GOT32:
765 case R_MN10300_GOT24:
766 case R_MN10300_GOT16:
767 /* This symbol requires a global offset table entry. */
768
769 if (sgot == NULL)
770 {
771 sgot = bfd_get_section_by_name (dynobj, ".got");
772 BFD_ASSERT (sgot != NULL);
773 }
774
775 if (srelgot == NULL
776 && (h != NULL || info->shared))
777 {
778 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
779 if (srelgot == NULL)
780 {
781 srelgot = bfd_make_section (dynobj, ".rela.got");
782 if (srelgot == NULL
783 || ! bfd_set_section_flags (dynobj, srelgot,
784 (SEC_ALLOC
785 | SEC_LOAD
786 | SEC_HAS_CONTENTS
787 | SEC_IN_MEMORY
788 | SEC_LINKER_CREATED
789 | SEC_READONLY))
790 || ! bfd_set_section_alignment (dynobj, srelgot, 2))
791 return FALSE;
792 }
793 }
794
795 if (h != NULL)
796 {
797 if (h->got.offset != (bfd_vma) -1)
798 /* We have already allocated space in the .got. */
799 break;
800
801 h->got.offset = sgot->size;
802
803 /* Make sure this symbol is output as a dynamic symbol. */
804 if (h->dynindx == -1)
805 {
806 if (! bfd_elf_link_record_dynamic_symbol (info, h))
807 return FALSE;
808 }
809
810 srelgot->size += sizeof (Elf32_External_Rela);
811 }
812 else
813 {
814 /* This is a global offset table entry for a local
815 symbol. */
816 if (local_got_offsets == NULL)
817 {
818 size_t size;
819 unsigned int i;
820
821 size = symtab_hdr->sh_info * sizeof (bfd_vma);
822 local_got_offsets = (bfd_vma *) bfd_alloc (abfd, size);
823
824 if (local_got_offsets == NULL)
825 return FALSE;
826 elf_local_got_offsets (abfd) = local_got_offsets;
827
828 for (i = 0; i < symtab_hdr->sh_info; i++)
829 local_got_offsets[i] = (bfd_vma) -1;
830 }
831
832 if (local_got_offsets[r_symndx] != (bfd_vma) -1)
833 /* We have already allocated space in the .got. */
834 break;
835
836 local_got_offsets[r_symndx] = sgot->size;
837
838 if (info->shared)
839 /* If we are generating a shared object, we need to
840 output a R_MN10300_RELATIVE reloc so that the dynamic
841 linker can adjust this GOT entry. */
842 srelgot->size += sizeof (Elf32_External_Rela);
843 }
844
845 sgot->size += 4;
846
847 break;
848
849 case R_MN10300_PLT32:
850 case R_MN10300_PLT16:
851 /* This symbol requires a procedure linkage table entry. We
852 actually build the entry in adjust_dynamic_symbol,
853 because this might be a case of linking PIC code which is
854 never referenced by a dynamic object, in which case we
855 don't need to generate a procedure linkage table entry
856 after all. */
857
858 /* If this is a local symbol, we resolve it directly without
859 creating a procedure linkage table entry. */
860 if (h == NULL)
861 continue;
862
863 if (ELF_ST_VISIBILITY (h->other) == STV_INTERNAL
864 || ELF_ST_VISIBILITY (h->other) == STV_HIDDEN)
865 break;
866
867 h->needs_plt = 1;
868
869 break;
870
871 case R_MN10300_24:
872 case R_MN10300_16:
873 case R_MN10300_8:
874 case R_MN10300_PCREL32:
875 case R_MN10300_PCREL16:
876 case R_MN10300_PCREL8:
877 if (h != NULL)
878 h->non_got_ref = 1;
879 break;
880
881 case R_MN10300_32:
882 if (h != NULL)
883 h->non_got_ref = 1;
884
885 /* If we are creating a shared library, then we need to copy
886 the reloc into the shared library. */
887 if (info->shared
888 && (sec->flags & SEC_ALLOC) != 0)
889 {
890 /* When creating a shared object, we must copy these
891 reloc types into the output file. We create a reloc
892 section in dynobj and make room for this reloc. */
893 if (sreloc == NULL)
894 {
895 const char * name;
896
897 name = (bfd_elf_string_from_elf_section
898 (abfd,
899 elf_elfheader (abfd)->e_shstrndx,
900 elf_section_data (sec)->rel_hdr.sh_name));
901 if (name == NULL)
902 return FALSE;
903
904 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
905 && strcmp (bfd_get_section_name (abfd, sec),
906 name + 5) == 0);
907
908 sreloc = bfd_get_section_by_name (dynobj, name);
909 if (sreloc == NULL)
910 {
911 flagword flags;
912
913 sreloc = bfd_make_section (dynobj, name);
914 flags = (SEC_HAS_CONTENTS | SEC_READONLY
915 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
916 if ((sec->flags & SEC_ALLOC) != 0)
917 flags |= SEC_ALLOC | SEC_LOAD;
918 if (sreloc == NULL
919 || ! bfd_set_section_flags (dynobj, sreloc, flags)
920 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
921 return FALSE;
922 }
923 }
924
925 sreloc->size += sizeof (Elf32_External_Rela);
926 }
927
928 break;
929 }
930 }
931
932 return TRUE;
933 }
934
935 /* Return the section that should be marked against GC for a given
936 relocation. */
937
938 static asection *
939 mn10300_elf_gc_mark_hook (sec, info, rel, h, sym)
940 asection *sec;
941 struct bfd_link_info *info ATTRIBUTE_UNUSED;
942 Elf_Internal_Rela *rel;
943 struct elf_link_hash_entry *h;
944 Elf_Internal_Sym *sym;
945 {
946 if (h != NULL)
947 {
948 switch (ELF32_R_TYPE (rel->r_info))
949 {
950 case R_MN10300_GNU_VTINHERIT:
951 case R_MN10300_GNU_VTENTRY:
952 break;
953
954 default:
955 switch (h->root.type)
956 {
957 case bfd_link_hash_defined:
958 case bfd_link_hash_defweak:
959 return h->root.u.def.section;
960
961 case bfd_link_hash_common:
962 return h->root.u.c.p->section;
963
964 default:
965 break;
966 }
967 }
968 }
969 else
970 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
971
972 return NULL;
973 }
974
975 /* Perform a relocation as part of a final link. */
976 static bfd_reloc_status_type
977 mn10300_elf_final_link_relocate (howto, input_bfd, output_bfd,
978 input_section, contents, offset, value,
979 addend, h, symndx, info, sym_sec, is_local)
980 reloc_howto_type *howto;
981 bfd *input_bfd;
982 bfd *output_bfd ATTRIBUTE_UNUSED;
983 asection *input_section;
984 bfd_byte *contents;
985 bfd_vma offset;
986 bfd_vma value;
987 bfd_vma addend;
988 struct elf_link_hash_entry * h;
989 unsigned long symndx;
990 struct bfd_link_info *info;
991 asection *sym_sec ATTRIBUTE_UNUSED;
992 int is_local ATTRIBUTE_UNUSED;
993 {
994 unsigned long r_type = howto->type;
995 bfd_byte *hit_data = contents + offset;
996 bfd * dynobj;
997 bfd_vma * local_got_offsets;
998 asection * sgot;
999 asection * splt;
1000 asection * sreloc;
1001
1002 dynobj = elf_hash_table (info)->dynobj;
1003 local_got_offsets = elf_local_got_offsets (input_bfd);
1004
1005 sgot = NULL;
1006 splt = NULL;
1007 sreloc = NULL;
1008
1009 switch (r_type)
1010 {
1011 case R_MN10300_24:
1012 case R_MN10300_16:
1013 case R_MN10300_8:
1014 case R_MN10300_PCREL8:
1015 case R_MN10300_PCREL16:
1016 case R_MN10300_PCREL32:
1017 case R_MN10300_GOTOFF32:
1018 case R_MN10300_GOTOFF24:
1019 case R_MN10300_GOTOFF16:
1020 if (info->shared
1021 && (input_section->flags & SEC_ALLOC) != 0
1022 && h != NULL
1023 && ! SYMBOL_REFERENCES_LOCAL (info, h))
1024 return bfd_reloc_dangerous;
1025 }
1026
1027 switch (r_type)
1028 {
1029 case R_MN10300_NONE:
1030 return bfd_reloc_ok;
1031
1032 case R_MN10300_32:
1033 if (info->shared
1034 && (input_section->flags & SEC_ALLOC) != 0)
1035 {
1036 Elf_Internal_Rela outrel;
1037 bfd_boolean skip, relocate;
1038
1039 /* When generating a shared object, these relocations are
1040 copied into the output file to be resolved at run
1041 time. */
1042 if (sreloc == NULL)
1043 {
1044 const char * name;
1045
1046 name = (bfd_elf_string_from_elf_section
1047 (input_bfd,
1048 elf_elfheader (input_bfd)->e_shstrndx,
1049 elf_section_data (input_section)->rel_hdr.sh_name));
1050 if (name == NULL)
1051 return FALSE;
1052
1053 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
1054 && strcmp (bfd_get_section_name (input_bfd,
1055 input_section),
1056 name + 5) == 0);
1057
1058 sreloc = bfd_get_section_by_name (dynobj, name);
1059 BFD_ASSERT (sreloc != NULL);
1060 }
1061
1062 skip = FALSE;
1063
1064 outrel.r_offset = _bfd_elf_section_offset (input_bfd, info,
1065 input_section, offset);
1066 if (outrel.r_offset == (bfd_vma) -1)
1067 skip = TRUE;
1068
1069 outrel.r_offset += (input_section->output_section->vma
1070 + input_section->output_offset);
1071
1072 if (skip)
1073 {
1074 memset (&outrel, 0, sizeof outrel);
1075 relocate = FALSE;
1076 }
1077 else
1078 {
1079 /* h->dynindx may be -1 if this symbol was marked to
1080 become local. */
1081 if (h == NULL
1082 || SYMBOL_REFERENCES_LOCAL (info, h))
1083 {
1084 relocate = TRUE;
1085 outrel.r_info = ELF32_R_INFO (0, R_MN10300_RELATIVE);
1086 outrel.r_addend = value + addend;
1087 }
1088 else
1089 {
1090 BFD_ASSERT (h->dynindx != -1);
1091 relocate = FALSE;
1092 outrel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_32);
1093 outrel.r_addend = value + addend;
1094 }
1095 }
1096
1097 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
1098 (bfd_byte *) (((Elf32_External_Rela *) sreloc->contents)
1099 + sreloc->reloc_count));
1100 ++sreloc->reloc_count;
1101
1102 /* If this reloc is against an external symbol, we do
1103 not want to fiddle with the addend. Otherwise, we
1104 need to include the symbol value so that it becomes
1105 an addend for the dynamic reloc. */
1106 if (! relocate)
1107 return bfd_reloc_ok;
1108 }
1109 value += addend;
1110 bfd_put_32 (input_bfd, value, hit_data);
1111 return bfd_reloc_ok;
1112
1113 case R_MN10300_24:
1114 value += addend;
1115
1116 if ((long) value > 0x7fffff || (long) value < -0x800000)
1117 return bfd_reloc_overflow;
1118
1119 bfd_put_8 (input_bfd, value & 0xff, hit_data);
1120 bfd_put_8 (input_bfd, (value >> 8) & 0xff, hit_data + 1);
1121 bfd_put_8 (input_bfd, (value >> 16) & 0xff, hit_data + 2);
1122 return bfd_reloc_ok;
1123
1124 case R_MN10300_16:
1125 value += addend;
1126
1127 if ((long) value > 0x7fff || (long) value < -0x8000)
1128 return bfd_reloc_overflow;
1129
1130 bfd_put_16 (input_bfd, value, hit_data);
1131 return bfd_reloc_ok;
1132
1133 case R_MN10300_8:
1134 value += addend;
1135
1136 if ((long) value > 0x7f || (long) value < -0x80)
1137 return bfd_reloc_overflow;
1138
1139 bfd_put_8 (input_bfd, value, hit_data);
1140 return bfd_reloc_ok;
1141
1142 case R_MN10300_PCREL8:
1143 value -= (input_section->output_section->vma
1144 + input_section->output_offset);
1145 value -= offset;
1146 value += addend;
1147
1148 if ((long) value > 0xff || (long) value < -0x100)
1149 return bfd_reloc_overflow;
1150
1151 bfd_put_8 (input_bfd, value, hit_data);
1152 return bfd_reloc_ok;
1153
1154 case R_MN10300_PCREL16:
1155 value -= (input_section->output_section->vma
1156 + input_section->output_offset);
1157 value -= offset;
1158 value += addend;
1159
1160 if ((long) value > 0xffff || (long) value < -0x10000)
1161 return bfd_reloc_overflow;
1162
1163 bfd_put_16 (input_bfd, value, hit_data);
1164 return bfd_reloc_ok;
1165
1166 case R_MN10300_PCREL32:
1167 value -= (input_section->output_section->vma
1168 + input_section->output_offset);
1169 value -= offset;
1170 value += addend;
1171
1172 bfd_put_32 (input_bfd, value, hit_data);
1173 return bfd_reloc_ok;
1174
1175 case R_MN10300_GNU_VTINHERIT:
1176 case R_MN10300_GNU_VTENTRY:
1177 return bfd_reloc_ok;
1178
1179 case R_MN10300_GOTPC32:
1180 /* Use global offset table as symbol value. */
1181
1182 value = bfd_get_section_by_name (dynobj,
1183 ".got")->output_section->vma;
1184 value -= (input_section->output_section->vma
1185 + input_section->output_offset);
1186 value -= offset;
1187 value += addend;
1188
1189 bfd_put_32 (input_bfd, value, hit_data);
1190 return bfd_reloc_ok;
1191
1192 case R_MN10300_GOTPC16:
1193 /* Use global offset table as symbol value. */
1194
1195 value = bfd_get_section_by_name (dynobj,
1196 ".got")->output_section->vma;
1197 value -= (input_section->output_section->vma
1198 + input_section->output_offset);
1199 value -= offset;
1200 value += addend;
1201
1202 if ((long) value > 0xffff || (long) value < -0x10000)
1203 return bfd_reloc_overflow;
1204
1205 bfd_put_16 (input_bfd, value, hit_data);
1206 return bfd_reloc_ok;
1207
1208 case R_MN10300_GOTOFF32:
1209 value -= bfd_get_section_by_name (dynobj,
1210 ".got")->output_section->vma;
1211 value += addend;
1212
1213 bfd_put_32 (input_bfd, value, hit_data);
1214 return bfd_reloc_ok;
1215
1216 case R_MN10300_GOTOFF24:
1217 value -= bfd_get_section_by_name (dynobj,
1218 ".got")->output_section->vma;
1219 value += addend;
1220
1221 if ((long) value > 0x7fffff || (long) value < -0x800000)
1222 return bfd_reloc_overflow;
1223
1224 bfd_put_8 (input_bfd, value, hit_data);
1225 bfd_put_8 (input_bfd, (value >> 8) & 0xff, hit_data + 1);
1226 bfd_put_8 (input_bfd, (value >> 16) & 0xff, hit_data + 2);
1227 return bfd_reloc_ok;
1228
1229 case R_MN10300_GOTOFF16:
1230 value -= bfd_get_section_by_name (dynobj,
1231 ".got")->output_section->vma;
1232 value += addend;
1233
1234 if ((long) value > 0xffff || (long) value < -0x10000)
1235 return bfd_reloc_overflow;
1236
1237 bfd_put_16 (input_bfd, value, hit_data);
1238 return bfd_reloc_ok;
1239
1240 case R_MN10300_PLT32:
1241 if (h != NULL
1242 && ELF_ST_VISIBILITY (h->other) != STV_INTERNAL
1243 && ELF_ST_VISIBILITY (h->other) != STV_HIDDEN
1244 && h->plt.offset != (bfd_vma) -1)
1245 {
1246 asection * splt;
1247
1248 splt = bfd_get_section_by_name (dynobj, ".plt");
1249
1250 value = (splt->output_section->vma
1251 + splt->output_offset
1252 + h->plt.offset) - value;
1253 }
1254
1255 value -= (input_section->output_section->vma
1256 + input_section->output_offset);
1257 value -= offset;
1258 value += addend;
1259
1260 bfd_put_32 (input_bfd, value, hit_data);
1261 return bfd_reloc_ok;
1262
1263 case R_MN10300_PLT16:
1264 if (h != NULL
1265 && ELF_ST_VISIBILITY (h->other) != STV_INTERNAL
1266 && ELF_ST_VISIBILITY (h->other) != STV_HIDDEN
1267 && h->plt.offset != (bfd_vma) -1)
1268 {
1269 asection * splt;
1270
1271 splt = bfd_get_section_by_name (dynobj, ".plt");
1272
1273 value = (splt->output_section->vma
1274 + splt->output_offset
1275 + h->plt.offset) - value;
1276 }
1277
1278 value -= (input_section->output_section->vma
1279 + input_section->output_offset);
1280 value -= offset;
1281 value += addend;
1282
1283 if ((long) value > 0xffff || (long) value < -0x10000)
1284 return bfd_reloc_overflow;
1285
1286 bfd_put_16 (input_bfd, value, hit_data);
1287 return bfd_reloc_ok;
1288
1289 case R_MN10300_GOT32:
1290 case R_MN10300_GOT24:
1291 case R_MN10300_GOT16:
1292 {
1293 asection * sgot;
1294
1295 sgot = bfd_get_section_by_name (dynobj, ".got");
1296
1297 if (h != NULL)
1298 {
1299 bfd_vma off;
1300
1301 off = h->got.offset;
1302 BFD_ASSERT (off != (bfd_vma) -1);
1303
1304 if (! elf_hash_table (info)->dynamic_sections_created
1305 || SYMBOL_REFERENCES_LOCAL (info, h))
1306 /* This is actually a static link, or it is a
1307 -Bsymbolic link and the symbol is defined
1308 locally, or the symbol was forced to be local
1309 because of a version file. We must initialize
1310 this entry in the global offset table.
1311
1312 When doing a dynamic link, we create a .rela.got
1313 relocation entry to initialize the value. This
1314 is done in the finish_dynamic_symbol routine. */
1315 bfd_put_32 (output_bfd, value,
1316 sgot->contents + off);
1317
1318 value = sgot->output_offset + off;
1319 }
1320 else
1321 {
1322 bfd_vma off;
1323
1324 off = elf_local_got_offsets (input_bfd)[symndx];
1325
1326 bfd_put_32 (output_bfd, value, sgot->contents + off);
1327
1328 if (info->shared)
1329 {
1330 asection * srelgot;
1331 Elf_Internal_Rela outrel;
1332
1333 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1334 BFD_ASSERT (srelgot != NULL);
1335
1336 outrel.r_offset = (sgot->output_section->vma
1337 + sgot->output_offset
1338 + off);
1339 outrel.r_info = ELF32_R_INFO (0, R_MN10300_RELATIVE);
1340 outrel.r_addend = value;
1341 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
1342 (bfd_byte *) (((Elf32_External_Rela *)
1343 srelgot->contents)
1344 + srelgot->reloc_count));
1345 ++ srelgot->reloc_count;
1346 }
1347
1348 value = sgot->output_offset + off;
1349 }
1350 }
1351
1352 value += addend;
1353
1354 if (r_type == R_MN10300_GOT32)
1355 {
1356 bfd_put_32 (input_bfd, value, hit_data);
1357 return bfd_reloc_ok;
1358 }
1359 else if (r_type == R_MN10300_GOT24)
1360 {
1361 if ((long) value > 0x7fffff || (long) value < -0x800000)
1362 return bfd_reloc_overflow;
1363
1364 bfd_put_8 (input_bfd, value & 0xff, 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 else if (r_type == R_MN10300_GOT16)
1370 {
1371 if ((long) value > 0xffff || (long) value < -0x10000)
1372 return bfd_reloc_overflow;
1373
1374 bfd_put_16 (input_bfd, value, hit_data);
1375 return bfd_reloc_ok;
1376 }
1377 /* Fall through. */
1378
1379 default:
1380 return bfd_reloc_notsupported;
1381 }
1382 }
1383 \f
1384 /* Relocate an MN10300 ELF section. */
1385 static bfd_boolean
1386 mn10300_elf_relocate_section (output_bfd, info, input_bfd, input_section,
1387 contents, relocs, local_syms, local_sections)
1388 bfd *output_bfd;
1389 struct bfd_link_info *info;
1390 bfd *input_bfd;
1391 asection *input_section;
1392 bfd_byte *contents;
1393 Elf_Internal_Rela *relocs;
1394 Elf_Internal_Sym *local_syms;
1395 asection **local_sections;
1396 {
1397 Elf_Internal_Shdr *symtab_hdr;
1398 struct elf_link_hash_entry **sym_hashes;
1399 Elf_Internal_Rela *rel, *relend;
1400
1401 if (info->relocatable)
1402 return TRUE;
1403
1404 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1405 sym_hashes = elf_sym_hashes (input_bfd);
1406
1407 rel = relocs;
1408 relend = relocs + input_section->reloc_count;
1409 for (; rel < relend; rel++)
1410 {
1411 int r_type;
1412 reloc_howto_type *howto;
1413 unsigned long r_symndx;
1414 Elf_Internal_Sym *sym;
1415 asection *sec;
1416 struct elf32_mn10300_link_hash_entry *h;
1417 bfd_vma relocation;
1418 bfd_reloc_status_type r;
1419
1420 r_symndx = ELF32_R_SYM (rel->r_info);
1421 r_type = ELF32_R_TYPE (rel->r_info);
1422 howto = elf_mn10300_howto_table + r_type;
1423
1424 /* Just skip the vtable gc relocs. */
1425 if (r_type == R_MN10300_GNU_VTINHERIT
1426 || r_type == R_MN10300_GNU_VTENTRY)
1427 continue;
1428
1429 h = NULL;
1430 sym = NULL;
1431 sec = NULL;
1432 if (r_symndx < symtab_hdr->sh_info)
1433 {
1434 sym = local_syms + r_symndx;
1435 sec = local_sections[r_symndx];
1436 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1437 }
1438 else
1439 {
1440 bfd_boolean unresolved_reloc;
1441 bfd_boolean warned;
1442 struct elf_link_hash_entry *hh;
1443
1444 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1445 r_symndx, symtab_hdr, sym_hashes,
1446 hh, sec, relocation,
1447 unresolved_reloc, warned);
1448
1449 h = (struct elf32_mn10300_link_hash_entry *) hh;
1450
1451 if ((h->root.root.type == bfd_link_hash_defined
1452 || h->root.root.type == bfd_link_hash_defweak)
1453 && ( r_type == R_MN10300_GOTPC32
1454 || r_type == R_MN10300_GOTPC16
1455 || (( r_type == R_MN10300_PLT32
1456 || r_type == R_MN10300_PLT16)
1457 && ELF_ST_VISIBILITY (h->root.other) != STV_INTERNAL
1458 && ELF_ST_VISIBILITY (h->root.other) != STV_HIDDEN
1459 && h->root.plt.offset != (bfd_vma) -1)
1460 || (( r_type == R_MN10300_GOT32
1461 || r_type == R_MN10300_GOT24
1462 || r_type == R_MN10300_GOT16)
1463 && elf_hash_table (info)->dynamic_sections_created
1464 && !SYMBOL_REFERENCES_LOCAL (info, hh))
1465 || (r_type == R_MN10300_32
1466 && !SYMBOL_REFERENCES_LOCAL (info, hh)
1467 && ((input_section->flags & SEC_ALLOC) != 0
1468 /* DWARF will emit R_MN10300_32 relocations
1469 in its sections against symbols defined
1470 externally in shared libraries. We can't
1471 do anything with them here. */
1472 || ((input_section->flags & SEC_DEBUGGING) != 0
1473 && h->root.def_dynamic)))))
1474 /* In these cases, we don't need the relocation
1475 value. We check specially because in some
1476 obscure cases sec->output_section will be NULL. */
1477 relocation = 0;
1478
1479 else if (unresolved_reloc)
1480 (*_bfd_error_handler)
1481 (_("%s: warning: unresolvable relocation against symbol `%s' from %s section"),
1482 bfd_get_filename (input_bfd), h->root.root.root.string,
1483 bfd_get_section_name (input_bfd, input_section));
1484 }
1485
1486 r = mn10300_elf_final_link_relocate (howto, input_bfd, output_bfd,
1487 input_section,
1488 contents, rel->r_offset,
1489 relocation, rel->r_addend,
1490 (struct elf_link_hash_entry *)h,
1491 r_symndx,
1492 info, sec, h == NULL);
1493
1494 if (r != bfd_reloc_ok)
1495 {
1496 const char *name;
1497 const char *msg = (const char *) 0;
1498
1499 if (h != NULL)
1500 name = h->root.root.root.string;
1501 else
1502 {
1503 name = (bfd_elf_string_from_elf_section
1504 (input_bfd, symtab_hdr->sh_link, sym->st_name));
1505 if (name == NULL || *name == '\0')
1506 name = bfd_section_name (input_bfd, sec);
1507 }
1508
1509 switch (r)
1510 {
1511 case bfd_reloc_overflow:
1512 if (! ((*info->callbacks->reloc_overflow)
1513 (info, (h ? &h->root.root : NULL), name,
1514 howto->name, (bfd_vma) 0, input_bfd,
1515 input_section, rel->r_offset)))
1516 return FALSE;
1517 break;
1518
1519 case bfd_reloc_undefined:
1520 if (! ((*info->callbacks->undefined_symbol)
1521 (info, name, input_bfd, input_section,
1522 rel->r_offset, TRUE)))
1523 return FALSE;
1524 break;
1525
1526 case bfd_reloc_outofrange:
1527 msg = _("internal error: out of range error");
1528 goto common_error;
1529
1530 case bfd_reloc_notsupported:
1531 msg = _("internal error: unsupported relocation error");
1532 goto common_error;
1533
1534 case bfd_reloc_dangerous:
1535 msg = _("internal error: dangerous error");
1536 goto common_error;
1537
1538 default:
1539 msg = _("internal error: unknown error");
1540 /* fall through */
1541
1542 common_error:
1543 if (!((*info->callbacks->warning)
1544 (info, msg, name, input_bfd, input_section,
1545 rel->r_offset)))
1546 return FALSE;
1547 break;
1548 }
1549 }
1550 }
1551
1552 return TRUE;
1553 }
1554
1555 /* Finish initializing one hash table entry. */
1556 static bfd_boolean
1557 elf32_mn10300_finish_hash_table_entry (gen_entry, in_args)
1558 struct bfd_hash_entry *gen_entry;
1559 PTR in_args;
1560 {
1561 struct elf32_mn10300_link_hash_entry *entry;
1562 struct bfd_link_info *link_info = (struct bfd_link_info *)in_args;
1563 unsigned int byte_count = 0;
1564
1565 entry = (struct elf32_mn10300_link_hash_entry *) gen_entry;
1566
1567 if (entry->root.root.type == bfd_link_hash_warning)
1568 entry = (struct elf32_mn10300_link_hash_entry *) entry->root.root.u.i.link;
1569
1570 /* If we already know we want to convert "call" to "calls" for calls
1571 to this symbol, then return now. */
1572 if (entry->flags == MN10300_CONVERT_CALL_TO_CALLS)
1573 return TRUE;
1574
1575 /* If there are no named calls to this symbol, or there's nothing we
1576 can move from the function itself into the "call" instruction,
1577 then note that all "call" instructions should be converted into
1578 "calls" instructions and return. If a symbol is available for
1579 dynamic symbol resolution (overridable or overriding), avoid
1580 custom calling conventions. */
1581 if (entry->direct_calls == 0
1582 || (entry->stack_size == 0 && entry->movm_args == 0)
1583 || (elf_hash_table (link_info)->dynamic_sections_created
1584 && ELF_ST_VISIBILITY (entry->root.other) != STV_INTERNAL
1585 && ELF_ST_VISIBILITY (entry->root.other) != STV_HIDDEN))
1586 {
1587 /* Make a note that we should convert "call" instructions to "calls"
1588 instructions for calls to this symbol. */
1589 entry->flags |= MN10300_CONVERT_CALL_TO_CALLS;
1590 return TRUE;
1591 }
1592
1593 /* We may be able to move some instructions from the function itself into
1594 the "call" instruction. Count how many bytes we might be able to
1595 eliminate in the function itself. */
1596
1597 /* A movm instruction is two bytes. */
1598 if (entry->movm_args)
1599 byte_count += 2;
1600
1601 /* Count the insn to allocate stack space too. */
1602 if (entry->stack_size > 0)
1603 {
1604 if (entry->stack_size <= 128)
1605 byte_count += 3;
1606 else
1607 byte_count += 4;
1608 }
1609
1610 /* If using "call" will result in larger code, then turn all
1611 the associated "call" instructions into "calls" instructions. */
1612 if (byte_count < entry->direct_calls)
1613 entry->flags |= MN10300_CONVERT_CALL_TO_CALLS;
1614
1615 /* This routine never fails. */
1616 return TRUE;
1617 }
1618
1619 /* This function handles relaxing for the mn10300.
1620
1621 There are quite a few relaxing opportunities available on the mn10300:
1622
1623 * calls:32 -> calls:16 2 bytes
1624 * call:32 -> call:16 2 bytes
1625
1626 * call:32 -> calls:32 1 byte
1627 * call:16 -> calls:16 1 byte
1628 * These are done anytime using "calls" would result
1629 in smaller code, or when necessary to preserve the
1630 meaning of the program.
1631
1632 * call:32 varies
1633 * call:16
1634 * In some circumstances we can move instructions
1635 from a function prologue into a "call" instruction.
1636 This is only done if the resulting code is no larger
1637 than the original code.
1638
1639 * jmp:32 -> jmp:16 2 bytes
1640 * jmp:16 -> bra:8 1 byte
1641
1642 * If the previous instruction is a conditional branch
1643 around the jump/bra, we may be able to reverse its condition
1644 and change its target to the jump's target. The jump/bra
1645 can then be deleted. 2 bytes
1646
1647 * mov abs32 -> mov abs16 1 or 2 bytes
1648
1649 * Most instructions which accept imm32 can relax to imm16 1 or 2 bytes
1650 - Most instructions which accept imm16 can relax to imm8 1 or 2 bytes
1651
1652 * Most instructions which accept d32 can relax to d16 1 or 2 bytes
1653 - Most instructions which accept d16 can relax to d8 1 or 2 bytes
1654
1655 We don't handle imm16->imm8 or d16->d8 as they're very rare
1656 and somewhat more difficult to support. */
1657
1658 static bfd_boolean
1659 mn10300_elf_relax_section (abfd, sec, link_info, again)
1660 bfd *abfd;
1661 asection *sec;
1662 struct bfd_link_info *link_info;
1663 bfd_boolean *again;
1664 {
1665 Elf_Internal_Shdr *symtab_hdr;
1666 Elf_Internal_Rela *internal_relocs = NULL;
1667 Elf_Internal_Rela *irel, *irelend;
1668 bfd_byte *contents = NULL;
1669 Elf_Internal_Sym *isymbuf = NULL;
1670 struct elf32_mn10300_link_hash_table *hash_table;
1671 asection *section = sec;
1672
1673 /* Assume nothing changes. */
1674 *again = FALSE;
1675
1676 /* We need a pointer to the mn10300 specific hash table. */
1677 hash_table = elf32_mn10300_hash_table (link_info);
1678
1679 /* Initialize fields in each hash table entry the first time through. */
1680 if ((hash_table->flags & MN10300_HASH_ENTRIES_INITIALIZED) == 0)
1681 {
1682 bfd *input_bfd;
1683
1684 /* Iterate over all the input bfds. */
1685 for (input_bfd = link_info->input_bfds;
1686 input_bfd != NULL;
1687 input_bfd = input_bfd->link_next)
1688 {
1689 /* We're going to need all the symbols for each bfd. */
1690 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1691 if (symtab_hdr->sh_info != 0)
1692 {
1693 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1694 if (isymbuf == NULL)
1695 isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
1696 symtab_hdr->sh_info, 0,
1697 NULL, NULL, NULL);
1698 if (isymbuf == NULL)
1699 goto error_return;
1700 }
1701
1702 /* Iterate over each section in this bfd. */
1703 for (section = input_bfd->sections;
1704 section != NULL;
1705 section = section->next)
1706 {
1707 struct elf32_mn10300_link_hash_entry *hash;
1708 Elf_Internal_Sym *sym;
1709 asection *sym_sec = NULL;
1710 const char *sym_name;
1711 char *new_name;
1712
1713 /* If there's nothing to do in this section, skip it. */
1714 if (! (((section->flags & SEC_RELOC) != 0
1715 && section->reloc_count != 0)
1716 || (section->flags & SEC_CODE) != 0))
1717 continue;
1718
1719 /* Get cached copy of section contents if it exists. */
1720 if (elf_section_data (section)->this_hdr.contents != NULL)
1721 contents = elf_section_data (section)->this_hdr.contents;
1722 else if (section->size != 0)
1723 {
1724 /* Go get them off disk. */
1725 if (!bfd_malloc_and_get_section (input_bfd, section,
1726 &contents))
1727 goto error_return;
1728 }
1729 else
1730 contents = NULL;
1731
1732 /* If there aren't any relocs, then there's nothing to do. */
1733 if ((section->flags & SEC_RELOC) != 0
1734 && section->reloc_count != 0)
1735 {
1736
1737 /* Get a copy of the native relocations. */
1738 internal_relocs = (_bfd_elf_link_read_relocs
1739 (input_bfd, section, (PTR) NULL,
1740 (Elf_Internal_Rela *) NULL,
1741 link_info->keep_memory));
1742 if (internal_relocs == NULL)
1743 goto error_return;
1744
1745 /* Now examine each relocation. */
1746 irel = internal_relocs;
1747 irelend = irel + section->reloc_count;
1748 for (; irel < irelend; irel++)
1749 {
1750 long r_type;
1751 unsigned long r_index;
1752 unsigned char code;
1753
1754 r_type = ELF32_R_TYPE (irel->r_info);
1755 r_index = ELF32_R_SYM (irel->r_info);
1756
1757 if (r_type < 0 || r_type >= (int) R_MN10300_MAX)
1758 goto error_return;
1759
1760 /* We need the name and hash table entry of the target
1761 symbol! */
1762 hash = NULL;
1763 sym = NULL;
1764 sym_sec = NULL;
1765
1766 if (r_index < symtab_hdr->sh_info)
1767 {
1768 /* A local symbol. */
1769 Elf_Internal_Sym *isym;
1770 struct elf_link_hash_table *elftab;
1771 bfd_size_type amt;
1772
1773 isym = isymbuf + r_index;
1774 if (isym->st_shndx == SHN_UNDEF)
1775 sym_sec = bfd_und_section_ptr;
1776 else if (isym->st_shndx == SHN_ABS)
1777 sym_sec = bfd_abs_section_ptr;
1778 else if (isym->st_shndx == SHN_COMMON)
1779 sym_sec = bfd_com_section_ptr;
1780 else
1781 sym_sec
1782 = bfd_section_from_elf_index (input_bfd,
1783 isym->st_shndx);
1784
1785 sym_name
1786 = bfd_elf_string_from_elf_section (input_bfd,
1787 (symtab_hdr
1788 ->sh_link),
1789 isym->st_name);
1790
1791 /* If it isn't a function, then we don't care
1792 about it. */
1793 if (ELF_ST_TYPE (isym->st_info) != STT_FUNC)
1794 continue;
1795
1796 /* Tack on an ID so we can uniquely identify this
1797 local symbol in the global hash table. */
1798 amt = strlen (sym_name) + 10;
1799 new_name = bfd_malloc (amt);
1800 if (new_name == 0)
1801 goto error_return;
1802
1803 sprintf (new_name, "%s_%08x", sym_name, sym_sec->id);
1804 sym_name = new_name;
1805
1806 elftab = &hash_table->static_hash_table->root;
1807 hash = ((struct elf32_mn10300_link_hash_entry *)
1808 elf_link_hash_lookup (elftab, sym_name,
1809 TRUE, TRUE, FALSE));
1810 free (new_name);
1811 }
1812 else
1813 {
1814 r_index -= symtab_hdr->sh_info;
1815 hash = (struct elf32_mn10300_link_hash_entry *)
1816 elf_sym_hashes (input_bfd)[r_index];
1817 }
1818
1819 /* If this is not a "call" instruction, then we
1820 should convert "call" instructions to "calls"
1821 instructions. */
1822 code = bfd_get_8 (input_bfd,
1823 contents + irel->r_offset - 1);
1824 if (code != 0xdd && code != 0xcd)
1825 hash->flags |= MN10300_CONVERT_CALL_TO_CALLS;
1826
1827 /* If this is a jump/call, then bump the
1828 direct_calls counter. Else force "call" to
1829 "calls" conversions. */
1830 if (r_type == R_MN10300_PCREL32
1831 || r_type == R_MN10300_PLT32
1832 || r_type == R_MN10300_PLT16
1833 || r_type == R_MN10300_PCREL16)
1834 hash->direct_calls++;
1835 else
1836 hash->flags |= MN10300_CONVERT_CALL_TO_CALLS;
1837 }
1838 }
1839
1840 /* Now look at the actual contents to get the stack size,
1841 and a list of what registers were saved in the prologue
1842 (ie movm_args). */
1843 if ((section->flags & SEC_CODE) != 0)
1844 {
1845 Elf_Internal_Sym *isym, *isymend;
1846 unsigned int sec_shndx;
1847 struct elf_link_hash_entry **hashes;
1848 struct elf_link_hash_entry **end_hashes;
1849 unsigned int symcount;
1850
1851 sec_shndx = _bfd_elf_section_from_bfd_section (input_bfd,
1852 section);
1853
1854 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
1855 - symtab_hdr->sh_info);
1856 hashes = elf_sym_hashes (input_bfd);
1857 end_hashes = hashes + symcount;
1858
1859 /* Look at each function defined in this section and
1860 update info for that function. */
1861 isymend = isymbuf + symtab_hdr->sh_info;
1862 for (isym = isymbuf; isym < isymend; isym++)
1863 {
1864 if (isym->st_shndx == sec_shndx
1865 && ELF_ST_TYPE (isym->st_info) == STT_FUNC)
1866 {
1867 struct elf_link_hash_table *elftab;
1868 bfd_size_type amt;
1869 struct elf_link_hash_entry **lhashes = hashes;
1870
1871 /* Skip a local symbol if it aliases a
1872 global one. */
1873 for (; lhashes < end_hashes; lhashes++)
1874 {
1875 hash = (struct elf32_mn10300_link_hash_entry *) *lhashes;
1876 if ((hash->root.root.type == bfd_link_hash_defined
1877 || hash->root.root.type == bfd_link_hash_defweak)
1878 && hash->root.root.u.def.section == section
1879 && hash->root.type == STT_FUNC
1880 && hash->root.root.u.def.value == isym->st_value)
1881 break;
1882 }
1883 if (lhashes != end_hashes)
1884 continue;
1885
1886 if (isym->st_shndx == SHN_UNDEF)
1887 sym_sec = bfd_und_section_ptr;
1888 else if (isym->st_shndx == SHN_ABS)
1889 sym_sec = bfd_abs_section_ptr;
1890 else if (isym->st_shndx == SHN_COMMON)
1891 sym_sec = bfd_com_section_ptr;
1892 else
1893 sym_sec
1894 = bfd_section_from_elf_index (input_bfd,
1895 isym->st_shndx);
1896
1897 sym_name = (bfd_elf_string_from_elf_section
1898 (input_bfd, symtab_hdr->sh_link,
1899 isym->st_name));
1900
1901 /* Tack on an ID so we can uniquely identify this
1902 local symbol in the global hash table. */
1903 amt = strlen (sym_name) + 10;
1904 new_name = bfd_malloc (amt);
1905 if (new_name == 0)
1906 goto error_return;
1907
1908 sprintf (new_name, "%s_%08x", sym_name, sym_sec->id);
1909 sym_name = new_name;
1910
1911 elftab = &hash_table->static_hash_table->root;
1912 hash = ((struct elf32_mn10300_link_hash_entry *)
1913 elf_link_hash_lookup (elftab, sym_name,
1914 TRUE, TRUE, FALSE));
1915 free (new_name);
1916 compute_function_info (input_bfd, hash,
1917 isym->st_value, contents);
1918 }
1919 }
1920
1921 for (; hashes < end_hashes; hashes++)
1922 {
1923 hash = (struct elf32_mn10300_link_hash_entry *) *hashes;
1924 if ((hash->root.root.type == bfd_link_hash_defined
1925 || hash->root.root.type == bfd_link_hash_defweak)
1926 && hash->root.root.u.def.section == section
1927 && hash->root.type == STT_FUNC)
1928 compute_function_info (input_bfd, hash,
1929 (hash)->root.root.u.def.value,
1930 contents);
1931 }
1932 }
1933
1934 /* Cache or free any memory we allocated for the relocs. */
1935 if (internal_relocs != NULL
1936 && elf_section_data (section)->relocs != internal_relocs)
1937 free (internal_relocs);
1938 internal_relocs = NULL;
1939
1940 /* Cache or free any memory we allocated for the contents. */
1941 if (contents != NULL
1942 && elf_section_data (section)->this_hdr.contents != contents)
1943 {
1944 if (! link_info->keep_memory)
1945 free (contents);
1946 else
1947 {
1948 /* Cache the section contents for elf_link_input_bfd. */
1949 elf_section_data (section)->this_hdr.contents = contents;
1950 }
1951 }
1952 contents = NULL;
1953 }
1954
1955 /* Cache or free any memory we allocated for the symbols. */
1956 if (isymbuf != NULL
1957 && symtab_hdr->contents != (unsigned char *) isymbuf)
1958 {
1959 if (! link_info->keep_memory)
1960 free (isymbuf);
1961 else
1962 {
1963 /* Cache the symbols for elf_link_input_bfd. */
1964 symtab_hdr->contents = (unsigned char *) isymbuf;
1965 }
1966 }
1967 isymbuf = NULL;
1968 }
1969
1970 /* Now iterate on each symbol in the hash table and perform
1971 the final initialization steps on each. */
1972 elf32_mn10300_link_hash_traverse (hash_table,
1973 elf32_mn10300_finish_hash_table_entry,
1974 link_info);
1975 elf32_mn10300_link_hash_traverse (hash_table->static_hash_table,
1976 elf32_mn10300_finish_hash_table_entry,
1977 link_info);
1978
1979 /* All entries in the hash table are fully initialized. */
1980 hash_table->flags |= MN10300_HASH_ENTRIES_INITIALIZED;
1981
1982 /* Now that everything has been initialized, go through each
1983 code section and delete any prologue insns which will be
1984 redundant because their operations will be performed by
1985 a "call" instruction. */
1986 for (input_bfd = link_info->input_bfds;
1987 input_bfd != NULL;
1988 input_bfd = input_bfd->link_next)
1989 {
1990 /* We're going to need all the local symbols for each bfd. */
1991 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1992 if (symtab_hdr->sh_info != 0)
1993 {
1994 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1995 if (isymbuf == NULL)
1996 isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
1997 symtab_hdr->sh_info, 0,
1998 NULL, NULL, NULL);
1999 if (isymbuf == NULL)
2000 goto error_return;
2001 }
2002
2003 /* Walk over each section in this bfd. */
2004 for (section = input_bfd->sections;
2005 section != NULL;
2006 section = section->next)
2007 {
2008 unsigned int sec_shndx;
2009 Elf_Internal_Sym *isym, *isymend;
2010 struct elf_link_hash_entry **hashes;
2011 struct elf_link_hash_entry **end_hashes;
2012 unsigned int symcount;
2013
2014 /* Skip non-code sections and empty sections. */
2015 if ((section->flags & SEC_CODE) == 0 || section->size == 0)
2016 continue;
2017
2018 if (section->reloc_count != 0)
2019 {
2020 /* Get a copy of the native relocations. */
2021 internal_relocs = (_bfd_elf_link_read_relocs
2022 (input_bfd, section, (PTR) NULL,
2023 (Elf_Internal_Rela *) NULL,
2024 link_info->keep_memory));
2025 if (internal_relocs == NULL)
2026 goto error_return;
2027 }
2028
2029 /* Get cached copy of section contents if it exists. */
2030 if (elf_section_data (section)->this_hdr.contents != NULL)
2031 contents = elf_section_data (section)->this_hdr.contents;
2032 else
2033 {
2034 /* Go get them off disk. */
2035 if (!bfd_malloc_and_get_section (input_bfd, section,
2036 &contents))
2037 goto error_return;
2038 }
2039
2040 sec_shndx = _bfd_elf_section_from_bfd_section (input_bfd,
2041 section);
2042
2043 /* Now look for any function in this section which needs
2044 insns deleted from its prologue. */
2045 isymend = isymbuf + symtab_hdr->sh_info;
2046 for (isym = isymbuf; isym < isymend; isym++)
2047 {
2048 struct elf32_mn10300_link_hash_entry *sym_hash;
2049 asection *sym_sec = NULL;
2050 const char *sym_name;
2051 char *new_name;
2052 struct elf_link_hash_table *elftab;
2053 bfd_size_type amt;
2054
2055 if (isym->st_shndx != sec_shndx)
2056 continue;
2057
2058 if (isym->st_shndx == SHN_UNDEF)
2059 sym_sec = bfd_und_section_ptr;
2060 else if (isym->st_shndx == SHN_ABS)
2061 sym_sec = bfd_abs_section_ptr;
2062 else if (isym->st_shndx == SHN_COMMON)
2063 sym_sec = bfd_com_section_ptr;
2064 else
2065 sym_sec
2066 = bfd_section_from_elf_index (input_bfd, isym->st_shndx);
2067
2068 sym_name
2069 = bfd_elf_string_from_elf_section (input_bfd,
2070 symtab_hdr->sh_link,
2071 isym->st_name);
2072
2073 /* Tack on an ID so we can uniquely identify this
2074 local symbol in the global hash table. */
2075 amt = strlen (sym_name) + 10;
2076 new_name = bfd_malloc (amt);
2077 if (new_name == 0)
2078 goto error_return;
2079 sprintf (new_name, "%s_%08x", sym_name, sym_sec->id);
2080 sym_name = new_name;
2081
2082 elftab = &hash_table->static_hash_table->root;
2083 sym_hash = ((struct elf32_mn10300_link_hash_entry *)
2084 elf_link_hash_lookup (elftab, sym_name,
2085 FALSE, FALSE, FALSE));
2086
2087 free (new_name);
2088 if (sym_hash == NULL)
2089 continue;
2090
2091 if (! (sym_hash->flags & MN10300_CONVERT_CALL_TO_CALLS)
2092 && ! (sym_hash->flags & MN10300_DELETED_PROLOGUE_BYTES))
2093 {
2094 int bytes = 0;
2095
2096 /* Note that we've changed things. */
2097 elf_section_data (section)->relocs = internal_relocs;
2098 elf_section_data (section)->this_hdr.contents = contents;
2099 symtab_hdr->contents = (unsigned char *) isymbuf;
2100
2101 /* Count how many bytes we're going to delete. */
2102 if (sym_hash->movm_args)
2103 bytes += 2;
2104
2105 if (sym_hash->stack_size > 0)
2106 {
2107 if (sym_hash->stack_size <= 128)
2108 bytes += 3;
2109 else
2110 bytes += 4;
2111 }
2112
2113 /* Note that we've deleted prologue bytes for this
2114 function. */
2115 sym_hash->flags |= MN10300_DELETED_PROLOGUE_BYTES;
2116
2117 /* Actually delete the bytes. */
2118 if (!mn10300_elf_relax_delete_bytes (input_bfd,
2119 section,
2120 isym->st_value,
2121 bytes))
2122 goto error_return;
2123
2124 /* Something changed. Not strictly necessary, but
2125 may lead to more relaxing opportunities. */
2126 *again = TRUE;
2127 }
2128 }
2129
2130 /* Look for any global functions in this section which
2131 need insns deleted from their prologues. */
2132 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
2133 - symtab_hdr->sh_info);
2134 hashes = elf_sym_hashes (input_bfd);
2135 end_hashes = hashes + symcount;
2136 for (; hashes < end_hashes; hashes++)
2137 {
2138 struct elf32_mn10300_link_hash_entry *sym_hash;
2139
2140 sym_hash = (struct elf32_mn10300_link_hash_entry *) *hashes;
2141 if ((sym_hash->root.root.type == bfd_link_hash_defined
2142 || sym_hash->root.root.type == bfd_link_hash_defweak)
2143 && sym_hash->root.root.u.def.section == section
2144 && ! (sym_hash->flags & MN10300_CONVERT_CALL_TO_CALLS)
2145 && ! (sym_hash->flags & MN10300_DELETED_PROLOGUE_BYTES))
2146 {
2147 int bytes = 0;
2148 bfd_vma symval;
2149
2150 /* Note that we've changed things. */
2151 elf_section_data (section)->relocs = internal_relocs;
2152 elf_section_data (section)->this_hdr.contents = contents;
2153 symtab_hdr->contents = (unsigned char *) isymbuf;
2154
2155 /* Count how many bytes we're going to delete. */
2156 if (sym_hash->movm_args)
2157 bytes += 2;
2158
2159 if (sym_hash->stack_size > 0)
2160 {
2161 if (sym_hash->stack_size <= 128)
2162 bytes += 3;
2163 else
2164 bytes += 4;
2165 }
2166
2167 /* Note that we've deleted prologue bytes for this
2168 function. */
2169 sym_hash->flags |= MN10300_DELETED_PROLOGUE_BYTES;
2170
2171 /* Actually delete the bytes. */
2172 symval = sym_hash->root.root.u.def.value;
2173 if (!mn10300_elf_relax_delete_bytes (input_bfd,
2174 section,
2175 symval,
2176 bytes))
2177 goto error_return;
2178
2179 /* Something changed. Not strictly necessary, but
2180 may lead to more relaxing opportunities. */
2181 *again = TRUE;
2182 }
2183 }
2184
2185 /* Cache or free any memory we allocated for the relocs. */
2186 if (internal_relocs != NULL
2187 && elf_section_data (section)->relocs != internal_relocs)
2188 free (internal_relocs);
2189 internal_relocs = NULL;
2190
2191 /* Cache or free any memory we allocated for the contents. */
2192 if (contents != NULL
2193 && elf_section_data (section)->this_hdr.contents != contents)
2194 {
2195 if (! link_info->keep_memory)
2196 free (contents);
2197 else
2198 {
2199 /* Cache the section contents for elf_link_input_bfd. */
2200 elf_section_data (section)->this_hdr.contents = contents;
2201 }
2202 }
2203 contents = NULL;
2204 }
2205
2206 /* Cache or free any memory we allocated for the symbols. */
2207 if (isymbuf != NULL
2208 && symtab_hdr->contents != (unsigned char *) isymbuf)
2209 {
2210 if (! link_info->keep_memory)
2211 free (isymbuf);
2212 else
2213 {
2214 /* Cache the symbols for elf_link_input_bfd. */
2215 symtab_hdr->contents = (unsigned char *) isymbuf;
2216 }
2217 }
2218 isymbuf = NULL;
2219 }
2220 }
2221
2222 /* (Re)initialize for the basic instruction shortening/relaxing pass. */
2223 contents = NULL;
2224 internal_relocs = NULL;
2225 isymbuf = NULL;
2226 /* For error_return. */
2227 section = sec;
2228
2229 /* We don't have to do anything for a relocatable link, if
2230 this section does not have relocs, or if this is not a
2231 code section. */
2232 if (link_info->relocatable
2233 || (sec->flags & SEC_RELOC) == 0
2234 || sec->reloc_count == 0
2235 || (sec->flags & SEC_CODE) == 0)
2236 return TRUE;
2237
2238 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2239
2240 /* Get a copy of the native relocations. */
2241 internal_relocs = (_bfd_elf_link_read_relocs
2242 (abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
2243 link_info->keep_memory));
2244 if (internal_relocs == NULL)
2245 goto error_return;
2246
2247 /* Walk through them looking for relaxing opportunities. */
2248 irelend = internal_relocs + sec->reloc_count;
2249 for (irel = internal_relocs; irel < irelend; irel++)
2250 {
2251 bfd_vma symval;
2252 struct elf32_mn10300_link_hash_entry *h = NULL;
2253
2254 /* If this isn't something that can be relaxed, then ignore
2255 this reloc. */
2256 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_NONE
2257 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_8
2258 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_MAX)
2259 continue;
2260
2261 /* Get the section contents if we haven't done so already. */
2262 if (contents == NULL)
2263 {
2264 /* Get cached copy if it exists. */
2265 if (elf_section_data (sec)->this_hdr.contents != NULL)
2266 contents = elf_section_data (sec)->this_hdr.contents;
2267 else
2268 {
2269 /* Go get them off disk. */
2270 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
2271 goto error_return;
2272 }
2273 }
2274
2275 /* Read this BFD's symbols if we haven't done so already. */
2276 if (isymbuf == NULL && symtab_hdr->sh_info != 0)
2277 {
2278 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
2279 if (isymbuf == NULL)
2280 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
2281 symtab_hdr->sh_info, 0,
2282 NULL, NULL, NULL);
2283 if (isymbuf == NULL)
2284 goto error_return;
2285 }
2286
2287 /* Get the value of the symbol referred to by the reloc. */
2288 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
2289 {
2290 Elf_Internal_Sym *isym;
2291 asection *sym_sec = NULL;
2292 const char *sym_name;
2293 char *new_name;
2294 bfd_vma saved_addend;
2295
2296 /* A local symbol. */
2297 isym = isymbuf + ELF32_R_SYM (irel->r_info);
2298 if (isym->st_shndx == SHN_UNDEF)
2299 sym_sec = bfd_und_section_ptr;
2300 else if (isym->st_shndx == SHN_ABS)
2301 sym_sec = bfd_abs_section_ptr;
2302 else if (isym->st_shndx == SHN_COMMON)
2303 sym_sec = bfd_com_section_ptr;
2304 else
2305 sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
2306
2307 sym_name = bfd_elf_string_from_elf_section (abfd,
2308 symtab_hdr->sh_link,
2309 isym->st_name);
2310
2311 if ((sym_sec->flags & SEC_MERGE)
2312 && ELF_ST_TYPE (isym->st_info) == STT_SECTION
2313 && sym_sec->sec_info_type == ELF_INFO_TYPE_MERGE)
2314 {
2315 saved_addend = irel->r_addend;
2316 symval = _bfd_elf_rela_local_sym (abfd, isym, &sym_sec, irel);
2317 symval += irel->r_addend;
2318 irel->r_addend = saved_addend;
2319 }
2320 else
2321 {
2322 symval = (isym->st_value
2323 + sym_sec->output_section->vma
2324 + sym_sec->output_offset);
2325 }
2326 /* Tack on an ID so we can uniquely identify this
2327 local symbol in the global hash table. */
2328 new_name = bfd_malloc ((bfd_size_type) strlen (sym_name) + 10);
2329 if (new_name == 0)
2330 goto error_return;
2331 sprintf (new_name, "%s_%08x", sym_name, sym_sec->id);
2332 sym_name = new_name;
2333
2334 h = (struct elf32_mn10300_link_hash_entry *)
2335 elf_link_hash_lookup (&hash_table->static_hash_table->root,
2336 sym_name, FALSE, FALSE, FALSE);
2337 free (new_name);
2338 }
2339 else
2340 {
2341 unsigned long indx;
2342
2343 /* An external symbol. */
2344 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
2345 h = (struct elf32_mn10300_link_hash_entry *)
2346 (elf_sym_hashes (abfd)[indx]);
2347 BFD_ASSERT (h != NULL);
2348 if (h->root.root.type != bfd_link_hash_defined
2349 && h->root.root.type != bfd_link_hash_defweak)
2350 {
2351 /* This appears to be a reference to an undefined
2352 symbol. Just ignore it--it will be caught by the
2353 regular reloc processing. */
2354 continue;
2355 }
2356
2357 symval = (h->root.root.u.def.value
2358 + h->root.root.u.def.section->output_section->vma
2359 + h->root.root.u.def.section->output_offset);
2360 }
2361
2362 /* For simplicity of coding, we are going to modify the section
2363 contents, the section relocs, and the BFD symbol table. We
2364 must tell the rest of the code not to free up this
2365 information. It would be possible to instead create a table
2366 of changes which have to be made, as is done in coff-mips.c;
2367 that would be more work, but would require less memory when
2368 the linker is run. */
2369
2370 /* Try to turn a 32bit pc-relative branch/call into a 16bit pc-relative
2371 branch/call, also deal with "call" -> "calls" conversions and
2372 insertion of prologue data into "call" instructions. */
2373 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL32
2374 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PLT32)
2375 {
2376 bfd_vma value = symval;
2377
2378 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PLT32
2379 && h != NULL
2380 && ELF_ST_VISIBILITY (h->root.other) != STV_INTERNAL
2381 && ELF_ST_VISIBILITY (h->root.other) != STV_HIDDEN
2382 && h->root.plt.offset != (bfd_vma) -1)
2383 {
2384 asection * splt;
2385
2386 splt = bfd_get_section_by_name (elf_hash_table (link_info)
2387 ->dynobj, ".plt");
2388
2389 value = ((splt->output_section->vma
2390 + splt->output_offset
2391 + h->root.plt.offset)
2392 - (sec->output_section->vma
2393 + sec->output_offset
2394 + irel->r_offset));
2395 }
2396
2397 /* If we've got a "call" instruction that needs to be turned
2398 into a "calls" instruction, do so now. It saves a byte. */
2399 if (h && (h->flags & MN10300_CONVERT_CALL_TO_CALLS))
2400 {
2401 unsigned char code;
2402
2403 /* Get the opcode. */
2404 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2405
2406 /* Make sure we're working with a "call" instruction! */
2407 if (code == 0xdd)
2408 {
2409 /* Note that we've changed the relocs, section contents,
2410 etc. */
2411 elf_section_data (sec)->relocs = internal_relocs;
2412 elf_section_data (sec)->this_hdr.contents = contents;
2413 symtab_hdr->contents = (unsigned char *) isymbuf;
2414
2415 /* Fix the opcode. */
2416 bfd_put_8 (abfd, 0xfc, contents + irel->r_offset - 1);
2417 bfd_put_8 (abfd, 0xff, contents + irel->r_offset);
2418
2419 /* Fix irel->r_offset and irel->r_addend. */
2420 irel->r_offset += 1;
2421 irel->r_addend += 1;
2422
2423 /* Delete one byte of data. */
2424 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2425 irel->r_offset + 3, 1))
2426 goto error_return;
2427
2428 /* That will change things, so, we should relax again.
2429 Note that this is not required, and it may be slow. */
2430 *again = TRUE;
2431 }
2432 }
2433 else if (h)
2434 {
2435 /* We've got a "call" instruction which needs some data
2436 from target function filled in. */
2437 unsigned char code;
2438
2439 /* Get the opcode. */
2440 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2441
2442 /* Insert data from the target function into the "call"
2443 instruction if needed. */
2444 if (code == 0xdd)
2445 {
2446 bfd_put_8 (abfd, h->movm_args, contents + irel->r_offset + 4);
2447 bfd_put_8 (abfd, h->stack_size + h->movm_stack_size,
2448 contents + irel->r_offset + 5);
2449 }
2450 }
2451
2452 /* Deal with pc-relative gunk. */
2453 value -= (sec->output_section->vma + sec->output_offset);
2454 value -= irel->r_offset;
2455 value += irel->r_addend;
2456
2457 /* See if the value will fit in 16 bits, note the high value is
2458 0x7fff + 2 as the target will be two bytes closer if we are
2459 able to relax. */
2460 if ((long) value < 0x8001 && (long) value > -0x8000)
2461 {
2462 unsigned char code;
2463
2464 /* Get the opcode. */
2465 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2466
2467 if (code != 0xdc && code != 0xdd && code != 0xff)
2468 continue;
2469
2470 /* Note that we've changed the relocs, section contents, etc. */
2471 elf_section_data (sec)->relocs = internal_relocs;
2472 elf_section_data (sec)->this_hdr.contents = contents;
2473 symtab_hdr->contents = (unsigned char *) isymbuf;
2474
2475 /* Fix the opcode. */
2476 if (code == 0xdc)
2477 bfd_put_8 (abfd, 0xcc, contents + irel->r_offset - 1);
2478 else if (code == 0xdd)
2479 bfd_put_8 (abfd, 0xcd, contents + irel->r_offset - 1);
2480 else if (code == 0xff)
2481 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
2482
2483 /* Fix the relocation's type. */
2484 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2485 (ELF32_R_TYPE (irel->r_info)
2486 == (int) R_MN10300_PLT32)
2487 ? R_MN10300_PLT16 :
2488 R_MN10300_PCREL16);
2489
2490 /* Delete two bytes of data. */
2491 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2492 irel->r_offset + 1, 2))
2493 goto error_return;
2494
2495 /* That will change things, so, we should relax again.
2496 Note that this is not required, and it may be slow. */
2497 *again = TRUE;
2498 }
2499 }
2500
2501 /* Try to turn a 16bit pc-relative branch into a 8bit pc-relative
2502 branch. */
2503 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL16)
2504 {
2505 bfd_vma value = symval;
2506
2507 /* If we've got a "call" instruction that needs to be turned
2508 into a "calls" instruction, do so now. It saves a byte. */
2509 if (h && (h->flags & MN10300_CONVERT_CALL_TO_CALLS))
2510 {
2511 unsigned char code;
2512
2513 /* Get the opcode. */
2514 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2515
2516 /* Make sure we're working with a "call" instruction! */
2517 if (code == 0xcd)
2518 {
2519 /* Note that we've changed the relocs, section contents,
2520 etc. */
2521 elf_section_data (sec)->relocs = internal_relocs;
2522 elf_section_data (sec)->this_hdr.contents = contents;
2523 symtab_hdr->contents = (unsigned char *) isymbuf;
2524
2525 /* Fix the opcode. */
2526 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 1);
2527 bfd_put_8 (abfd, 0xff, contents + irel->r_offset);
2528
2529 /* Fix irel->r_offset and irel->r_addend. */
2530 irel->r_offset += 1;
2531 irel->r_addend += 1;
2532
2533 /* Delete one byte of data. */
2534 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2535 irel->r_offset + 1, 1))
2536 goto error_return;
2537
2538 /* That will change things, so, we should relax again.
2539 Note that this is not required, and it may be slow. */
2540 *again = TRUE;
2541 }
2542 }
2543 else if (h)
2544 {
2545 unsigned char code;
2546
2547 /* Get the opcode. */
2548 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2549
2550 /* Insert data from the target function into the "call"
2551 instruction if needed. */
2552 if (code == 0xcd)
2553 {
2554 bfd_put_8 (abfd, h->movm_args, contents + irel->r_offset + 2);
2555 bfd_put_8 (abfd, h->stack_size + h->movm_stack_size,
2556 contents + irel->r_offset + 3);
2557 }
2558 }
2559
2560 /* Deal with pc-relative gunk. */
2561 value -= (sec->output_section->vma + sec->output_offset);
2562 value -= irel->r_offset;
2563 value += irel->r_addend;
2564
2565 /* See if the value will fit in 8 bits, note the high value is
2566 0x7f + 1 as the target will be one bytes closer if we are
2567 able to relax. */
2568 if ((long) value < 0x80 && (long) value > -0x80)
2569 {
2570 unsigned char code;
2571
2572 /* Get the opcode. */
2573 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2574
2575 if (code != 0xcc)
2576 continue;
2577
2578 /* Note that we've changed the relocs, section contents, etc. */
2579 elf_section_data (sec)->relocs = internal_relocs;
2580 elf_section_data (sec)->this_hdr.contents = contents;
2581 symtab_hdr->contents = (unsigned char *) isymbuf;
2582
2583 /* Fix the opcode. */
2584 bfd_put_8 (abfd, 0xca, contents + irel->r_offset - 1);
2585
2586 /* Fix the relocation's type. */
2587 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2588 R_MN10300_PCREL8);
2589
2590 /* Delete one byte of data. */
2591 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2592 irel->r_offset + 1, 1))
2593 goto error_return;
2594
2595 /* That will change things, so, we should relax again.
2596 Note that this is not required, and it may be slow. */
2597 *again = TRUE;
2598 }
2599 }
2600
2601 /* Try to eliminate an unconditional 8 bit pc-relative branch
2602 which immediately follows a conditional 8 bit pc-relative
2603 branch around the unconditional branch.
2604
2605 original: new:
2606 bCC lab1 bCC' lab2
2607 bra lab2
2608 lab1: lab1:
2609
2610 This happens when the bCC can't reach lab2 at assembly time,
2611 but due to other relaxations it can reach at link time. */
2612 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL8)
2613 {
2614 Elf_Internal_Rela *nrel;
2615 bfd_vma value = symval;
2616 unsigned char code;
2617
2618 /* Deal with pc-relative gunk. */
2619 value -= (sec->output_section->vma + sec->output_offset);
2620 value -= irel->r_offset;
2621 value += irel->r_addend;
2622
2623 /* Do nothing if this reloc is the last byte in the section. */
2624 if (irel->r_offset == sec->size)
2625 continue;
2626
2627 /* See if the next instruction is an unconditional pc-relative
2628 branch, more often than not this test will fail, so we
2629 test it first to speed things up. */
2630 code = bfd_get_8 (abfd, contents + irel->r_offset + 1);
2631 if (code != 0xca)
2632 continue;
2633
2634 /* Also make sure the next relocation applies to the next
2635 instruction and that it's a pc-relative 8 bit branch. */
2636 nrel = irel + 1;
2637 if (nrel == irelend
2638 || irel->r_offset + 2 != nrel->r_offset
2639 || ELF32_R_TYPE (nrel->r_info) != (int) R_MN10300_PCREL8)
2640 continue;
2641
2642 /* Make sure our destination immediately follows the
2643 unconditional branch. */
2644 if (symval != (sec->output_section->vma + sec->output_offset
2645 + irel->r_offset + 3))
2646 continue;
2647
2648 /* Now make sure we are a conditional branch. This may not
2649 be necessary, but why take the chance.
2650
2651 Note these checks assume that R_MN10300_PCREL8 relocs
2652 only occur on bCC and bCCx insns. If they occured
2653 elsewhere, we'd need to know the start of this insn
2654 for this check to be accurate. */
2655 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2656 if (code != 0xc0 && code != 0xc1 && code != 0xc2
2657 && code != 0xc3 && code != 0xc4 && code != 0xc5
2658 && code != 0xc6 && code != 0xc7 && code != 0xc8
2659 && code != 0xc9 && code != 0xe8 && code != 0xe9
2660 && code != 0xea && code != 0xeb)
2661 continue;
2662
2663 /* We also have to be sure there is no symbol/label
2664 at the unconditional branch. */
2665 if (mn10300_elf_symbol_address_p (abfd, sec, isymbuf,
2666 irel->r_offset + 1))
2667 continue;
2668
2669 /* Note that we've changed the relocs, section contents, etc. */
2670 elf_section_data (sec)->relocs = internal_relocs;
2671 elf_section_data (sec)->this_hdr.contents = contents;
2672 symtab_hdr->contents = (unsigned char *) isymbuf;
2673
2674 /* Reverse the condition of the first branch. */
2675 switch (code)
2676 {
2677 case 0xc8:
2678 code = 0xc9;
2679 break;
2680 case 0xc9:
2681 code = 0xc8;
2682 break;
2683 case 0xc0:
2684 code = 0xc2;
2685 break;
2686 case 0xc2:
2687 code = 0xc0;
2688 break;
2689 case 0xc3:
2690 code = 0xc1;
2691 break;
2692 case 0xc1:
2693 code = 0xc3;
2694 break;
2695 case 0xc4:
2696 code = 0xc6;
2697 break;
2698 case 0xc6:
2699 code = 0xc4;
2700 break;
2701 case 0xc7:
2702 code = 0xc5;
2703 break;
2704 case 0xc5:
2705 code = 0xc7;
2706 break;
2707 case 0xe8:
2708 code = 0xe9;
2709 break;
2710 case 0x9d:
2711 code = 0xe8;
2712 break;
2713 case 0xea:
2714 code = 0xeb;
2715 break;
2716 case 0xeb:
2717 code = 0xea;
2718 break;
2719 }
2720 bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
2721
2722 /* Set the reloc type and symbol for the first branch
2723 from the second branch. */
2724 irel->r_info = nrel->r_info;
2725
2726 /* Make the reloc for the second branch a null reloc. */
2727 nrel->r_info = ELF32_R_INFO (ELF32_R_SYM (nrel->r_info),
2728 R_MN10300_NONE);
2729
2730 /* Delete two bytes of data. */
2731 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2732 irel->r_offset + 1, 2))
2733 goto error_return;
2734
2735 /* That will change things, so, we should relax again.
2736 Note that this is not required, and it may be slow. */
2737 *again = TRUE;
2738 }
2739
2740 /* Try to turn a 24 immediate, displacement or absolute address
2741 into a 8 immediate, displacement or absolute address. */
2742 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_24)
2743 {
2744 bfd_vma value = symval;
2745 value += irel->r_addend;
2746
2747 /* See if the value will fit in 8 bits. */
2748 if ((long) value < 0x7f && (long) value > -0x80)
2749 {
2750 unsigned char code;
2751
2752 /* AM33 insns which have 24 operands are 6 bytes long and
2753 will have 0xfd as the first byte. */
2754
2755 /* Get the first opcode. */
2756 code = bfd_get_8 (abfd, contents + irel->r_offset - 3);
2757
2758 if (code == 0xfd)
2759 {
2760 /* Get the second opcode. */
2761 code = bfd_get_8 (abfd, contents + irel->r_offset - 2);
2762
2763 /* We can not relax 0x6b, 0x7b, 0x8b, 0x9b as no 24bit
2764 equivalent instructions exists. */
2765 if (code != 0x6b && code != 0x7b
2766 && code != 0x8b && code != 0x9b
2767 && ((code & 0x0f) == 0x09 || (code & 0x0f) == 0x08
2768 || (code & 0x0f) == 0x0a || (code & 0x0f) == 0x0b
2769 || (code & 0x0f) == 0x0e))
2770 {
2771 /* Not safe if the high bit is on as relaxing may
2772 move the value out of high mem and thus not fit
2773 in a signed 8bit value. This is currently over
2774 conservative. */
2775 if ((value & 0x80) == 0)
2776 {
2777 /* Note that we've changed the relocation contents,
2778 etc. */
2779 elf_section_data (sec)->relocs = internal_relocs;
2780 elf_section_data (sec)->this_hdr.contents = contents;
2781 symtab_hdr->contents = (unsigned char *) isymbuf;
2782
2783 /* Fix the opcode. */
2784 bfd_put_8 (abfd, 0xfb, contents + irel->r_offset - 3);
2785 bfd_put_8 (abfd, code, contents + irel->r_offset - 2);
2786
2787 /* Fix the relocation's type. */
2788 irel->r_info =
2789 ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2790 R_MN10300_8);
2791
2792 /* Delete two bytes of data. */
2793 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2794 irel->r_offset + 1, 2))
2795 goto error_return;
2796
2797 /* That will change things, so, we should relax
2798 again. Note that this is not required, and it
2799 may be slow. */
2800 *again = TRUE;
2801 break;
2802 }
2803 }
2804 }
2805 }
2806 }
2807
2808 /* Try to turn a 32bit immediate, displacement or absolute address
2809 into a 16bit immediate, displacement or absolute address. */
2810 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_32
2811 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOT32
2812 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOTOFF32
2813 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOTPC32)
2814 {
2815 bfd_vma value = symval;
2816
2817 if (ELF32_R_TYPE (irel->r_info) != (int) R_MN10300_32)
2818 {
2819 asection * sgot;
2820
2821 sgot = bfd_get_section_by_name (elf_hash_table (link_info)
2822 ->dynobj, ".got");
2823
2824 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOT32)
2825 {
2826 value = sgot->output_offset;
2827
2828 if (h)
2829 value += h->root.got.offset;
2830 else
2831 value += (elf_local_got_offsets
2832 (abfd)[ELF32_R_SYM (irel->r_info)]);
2833 }
2834 else if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOTOFF32)
2835 value -= sgot->output_section->vma;
2836 else if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOTPC32)
2837 value = (sgot->output_section->vma
2838 - (sec->output_section->vma
2839 + sec->output_offset
2840 + irel->r_offset));
2841 else
2842 abort ();
2843 }
2844
2845 value += irel->r_addend;
2846
2847 /* See if the value will fit in 24 bits.
2848 We allow any 16bit match here. We prune those we can't
2849 handle below. */
2850 if ((long) value < 0x7fffff && (long) value > -0x800000)
2851 {
2852 unsigned char code;
2853
2854 /* AM33 insns which have 32bit operands are 7 bytes long and
2855 will have 0xfe as the first byte. */
2856
2857 /* Get the first opcode. */
2858 code = bfd_get_8 (abfd, contents + irel->r_offset - 3);
2859
2860 if (code == 0xfe)
2861 {
2862 /* Get the second opcode. */
2863 code = bfd_get_8 (abfd, contents + irel->r_offset - 2);
2864
2865 /* All the am33 32 -> 24 relaxing possibilities. */
2866 /* We can not relax 0x6b, 0x7b, 0x8b, 0x9b as no 24bit
2867 equivalent instructions exists. */
2868 if (code != 0x6b && code != 0x7b
2869 && code != 0x8b && code != 0x9b
2870 && (ELF32_R_TYPE (irel->r_info)
2871 != (int) R_MN10300_GOTPC32)
2872 && ((code & 0x0f) == 0x09 || (code & 0x0f) == 0x08
2873 || (code & 0x0f) == 0x0a || (code & 0x0f) == 0x0b
2874 || (code & 0x0f) == 0x0e))
2875 {
2876 /* Not safe if the high bit is on as relaxing may
2877 move the value out of high mem and thus not fit
2878 in a signed 16bit value. This is currently over
2879 conservative. */
2880 if ((value & 0x8000) == 0)
2881 {
2882 /* Note that we've changed the relocation contents,
2883 etc. */
2884 elf_section_data (sec)->relocs = internal_relocs;
2885 elf_section_data (sec)->this_hdr.contents = contents;
2886 symtab_hdr->contents = (unsigned char *) isymbuf;
2887
2888 /* Fix the opcode. */
2889 bfd_put_8 (abfd, 0xfd, contents + irel->r_offset - 3);
2890 bfd_put_8 (abfd, code, contents + irel->r_offset - 2);
2891
2892 /* Fix the relocation's type. */
2893 irel->r_info =
2894 ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2895 (ELF32_R_TYPE (irel->r_info)
2896 == (int) R_MN10300_GOTOFF32)
2897 ? R_MN10300_GOTOFF24
2898 : (ELF32_R_TYPE (irel->r_info)
2899 == (int) R_MN10300_GOT32)
2900 ? R_MN10300_GOT24 :
2901 R_MN10300_24);
2902
2903 /* Delete one byte of data. */
2904 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2905 irel->r_offset + 3, 1))
2906 goto error_return;
2907
2908 /* That will change things, so, we should relax
2909 again. Note that this is not required, and it
2910 may be slow. */
2911 *again = TRUE;
2912 break;
2913 }
2914 }
2915 }
2916 }
2917
2918 /* See if the value will fit in 16 bits.
2919 We allow any 16bit match here. We prune those we can't
2920 handle below. */
2921 if ((long) value < 0x7fff && (long) value > -0x8000)
2922 {
2923 unsigned char code;
2924
2925 /* Most insns which have 32bit operands are 6 bytes long;
2926 exceptions are pcrel insns and bit insns.
2927
2928 We handle pcrel insns above. We don't bother trying
2929 to handle the bit insns here.
2930
2931 The first byte of the remaining insns will be 0xfc. */
2932
2933 /* Get the first opcode. */
2934 code = bfd_get_8 (abfd, contents + irel->r_offset - 2);
2935
2936 if (code != 0xfc)
2937 continue;
2938
2939 /* Get the second opcode. */
2940 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2941
2942 if ((code & 0xf0) < 0x80)
2943 switch (code & 0xf0)
2944 {
2945 /* mov (d32,am),dn -> mov (d32,am),dn
2946 mov dm,(d32,am) -> mov dn,(d32,am)
2947 mov (d32,am),an -> mov (d32,am),an
2948 mov dm,(d32,am) -> mov dn,(d32,am)
2949 movbu (d32,am),dn -> movbu (d32,am),dn
2950 movbu dm,(d32,am) -> movbu dn,(d32,am)
2951 movhu (d32,am),dn -> movhu (d32,am),dn
2952 movhu dm,(d32,am) -> movhu dn,(d32,am) */
2953 case 0x00:
2954 case 0x10:
2955 case 0x20:
2956 case 0x30:
2957 case 0x40:
2958 case 0x50:
2959 case 0x60:
2960 case 0x70:
2961 /* Not safe if the high bit is on as relaxing may
2962 move the value out of high mem and thus not fit
2963 in a signed 16bit value. */
2964 if (code == 0xcc
2965 && (value & 0x8000))
2966 continue;
2967
2968 /* Note that we've changed the relocation contents, etc. */
2969 elf_section_data (sec)->relocs = internal_relocs;
2970 elf_section_data (sec)->this_hdr.contents = contents;
2971 symtab_hdr->contents = (unsigned char *) isymbuf;
2972
2973 /* Fix the opcode. */
2974 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
2975 bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
2976
2977 /* Fix the relocation's type. */
2978 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2979 (ELF32_R_TYPE (irel->r_info)
2980 == (int) R_MN10300_GOTOFF32)
2981 ? R_MN10300_GOTOFF16
2982 : (ELF32_R_TYPE (irel->r_info)
2983 == (int) R_MN10300_GOT32)
2984 ? R_MN10300_GOT16
2985 : (ELF32_R_TYPE (irel->r_info)
2986 == (int) R_MN10300_GOTPC32)
2987 ? R_MN10300_GOTPC16 :
2988 R_MN10300_16);
2989
2990 /* Delete two bytes of data. */
2991 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2992 irel->r_offset + 2, 2))
2993 goto error_return;
2994
2995 /* That will change things, so, we should relax again.
2996 Note that this is not required, and it may be slow. */
2997 *again = TRUE;
2998 break;
2999 }
3000 else if ((code & 0xf0) == 0x80
3001 || (code & 0xf0) == 0x90)
3002 switch (code & 0xf3)
3003 {
3004 /* mov dn,(abs32) -> mov dn,(abs16)
3005 movbu dn,(abs32) -> movbu dn,(abs16)
3006 movhu dn,(abs32) -> movhu dn,(abs16) */
3007 case 0x81:
3008 case 0x82:
3009 case 0x83:
3010 /* Note that we've changed the relocation contents, etc. */
3011 elf_section_data (sec)->relocs = internal_relocs;
3012 elf_section_data (sec)->this_hdr.contents = contents;
3013 symtab_hdr->contents = (unsigned char *) isymbuf;
3014
3015 if ((code & 0xf3) == 0x81)
3016 code = 0x01 + (code & 0x0c);
3017 else if ((code & 0xf3) == 0x82)
3018 code = 0x02 + (code & 0x0c);
3019 else if ((code & 0xf3) == 0x83)
3020 code = 0x03 + (code & 0x0c);
3021 else
3022 abort ();
3023
3024 /* Fix the opcode. */
3025 bfd_put_8 (abfd, code, contents + irel->r_offset - 2);
3026
3027 /* Fix the relocation's type. */
3028 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3029 (ELF32_R_TYPE (irel->r_info)
3030 == (int) R_MN10300_GOTOFF32)
3031 ? R_MN10300_GOTOFF16
3032 : (ELF32_R_TYPE (irel->r_info)
3033 == (int) R_MN10300_GOT32)
3034 ? R_MN10300_GOT16
3035 : (ELF32_R_TYPE (irel->r_info)
3036 == (int) R_MN10300_GOTPC32)
3037 ? R_MN10300_GOTPC16 :
3038 R_MN10300_16);
3039
3040 /* The opcode got shorter too, so we have to fix the
3041 addend and offset too! */
3042 irel->r_offset -= 1;
3043
3044 /* Delete three bytes of data. */
3045 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3046 irel->r_offset + 1, 3))
3047 goto error_return;
3048
3049 /* That will change things, so, we should relax again.
3050 Note that this is not required, and it may be slow. */
3051 *again = TRUE;
3052 break;
3053
3054 /* mov am,(abs32) -> mov am,(abs16)
3055 mov am,(d32,sp) -> mov am,(d16,sp)
3056 mov dm,(d32,sp) -> mov dm,(d32,sp)
3057 movbu dm,(d32,sp) -> movbu dm,(d32,sp)
3058 movhu dm,(d32,sp) -> movhu dm,(d32,sp) */
3059 case 0x80:
3060 case 0x90:
3061 case 0x91:
3062 case 0x92:
3063 case 0x93:
3064 /* sp-based offsets are zero-extended. */
3065 if (code >= 0x90 && code <= 0x93
3066 && (long)value < 0)
3067 continue;
3068
3069 /* Note that we've changed the relocation contents, etc. */
3070 elf_section_data (sec)->relocs = internal_relocs;
3071 elf_section_data (sec)->this_hdr.contents = contents;
3072 symtab_hdr->contents = (unsigned char *) isymbuf;
3073
3074 /* Fix the opcode. */
3075 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
3076 bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
3077
3078 /* Fix the relocation's type. */
3079 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3080 (ELF32_R_TYPE (irel->r_info)
3081 == (int) R_MN10300_GOTOFF32)
3082 ? R_MN10300_GOTOFF16
3083 : (ELF32_R_TYPE (irel->r_info)
3084 == (int) R_MN10300_GOT32)
3085 ? R_MN10300_GOT16
3086 : (ELF32_R_TYPE (irel->r_info)
3087 == (int) R_MN10300_GOTPC32)
3088 ? R_MN10300_GOTPC16 :
3089 R_MN10300_16);
3090
3091 /* Delete two bytes of data. */
3092 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3093 irel->r_offset + 2, 2))
3094 goto error_return;
3095
3096 /* That will change things, so, we should relax again.
3097 Note that this is not required, and it may be slow. */
3098 *again = TRUE;
3099 break;
3100 }
3101 else if ((code & 0xf0) < 0xf0)
3102 switch (code & 0xfc)
3103 {
3104 /* mov imm32,dn -> mov imm16,dn
3105 mov imm32,an -> mov imm16,an
3106 mov (abs32),dn -> mov (abs16),dn
3107 movbu (abs32),dn -> movbu (abs16),dn
3108 movhu (abs32),dn -> movhu (abs16),dn */
3109 case 0xcc:
3110 case 0xdc:
3111 case 0xa4:
3112 case 0xa8:
3113 case 0xac:
3114 /* Not safe if the high bit is on as relaxing may
3115 move the value out of high mem and thus not fit
3116 in a signed 16bit value. */
3117 if (code == 0xcc
3118 && (value & 0x8000))
3119 continue;
3120
3121 /* mov imm16, an zero-extends the immediate. */
3122 if (code == 0xdc
3123 && (long)value < 0)
3124 continue;
3125
3126 /* Note that we've changed the relocation contents, etc. */
3127 elf_section_data (sec)->relocs = internal_relocs;
3128 elf_section_data (sec)->this_hdr.contents = contents;
3129 symtab_hdr->contents = (unsigned char *) isymbuf;
3130
3131 if ((code & 0xfc) == 0xcc)
3132 code = 0x2c + (code & 0x03);
3133 else if ((code & 0xfc) == 0xdc)
3134 code = 0x24 + (code & 0x03);
3135 else if ((code & 0xfc) == 0xa4)
3136 code = 0x30 + (code & 0x03);
3137 else if ((code & 0xfc) == 0xa8)
3138 code = 0x34 + (code & 0x03);
3139 else if ((code & 0xfc) == 0xac)
3140 code = 0x38 + (code & 0x03);
3141 else
3142 abort ();
3143
3144 /* Fix the opcode. */
3145 bfd_put_8 (abfd, code, contents + irel->r_offset - 2);
3146
3147 /* Fix the relocation's type. */
3148 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3149 (ELF32_R_TYPE (irel->r_info)
3150 == (int) R_MN10300_GOTOFF32)
3151 ? R_MN10300_GOTOFF16
3152 : (ELF32_R_TYPE (irel->r_info)
3153 == (int) R_MN10300_GOT32)
3154 ? R_MN10300_GOT16
3155 : (ELF32_R_TYPE (irel->r_info)
3156 == (int) R_MN10300_GOTPC32)
3157 ? R_MN10300_GOTPC16 :
3158 R_MN10300_16);
3159
3160 /* The opcode got shorter too, so we have to fix the
3161 addend and offset too! */
3162 irel->r_offset -= 1;
3163
3164 /* Delete three bytes of data. */
3165 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3166 irel->r_offset + 1, 3))
3167 goto error_return;
3168
3169 /* That will change things, so, we should relax again.
3170 Note that this is not required, and it may be slow. */
3171 *again = TRUE;
3172 break;
3173
3174 /* mov (abs32),an -> mov (abs16),an
3175 mov (d32,sp),an -> mov (d16,sp),an
3176 mov (d32,sp),dn -> mov (d16,sp),dn
3177 movbu (d32,sp),dn -> movbu (d16,sp),dn
3178 movhu (d32,sp),dn -> movhu (d16,sp),dn
3179 add imm32,dn -> add imm16,dn
3180 cmp imm32,dn -> cmp imm16,dn
3181 add imm32,an -> add imm16,an
3182 cmp imm32,an -> cmp imm16,an
3183 and imm32,dn -> and imm16,dn
3184 or imm32,dn -> or imm16,dn
3185 xor imm32,dn -> xor imm16,dn
3186 btst imm32,dn -> btst imm16,dn */
3187
3188 case 0xa0:
3189 case 0xb0:
3190 case 0xb1:
3191 case 0xb2:
3192 case 0xb3:
3193 case 0xc0:
3194 case 0xc8:
3195
3196 case 0xd0:
3197 case 0xd8:
3198 case 0xe0:
3199 case 0xe1:
3200 case 0xe2:
3201 case 0xe3:
3202 /* cmp imm16, an zero-extends the immediate. */
3203 if (code == 0xdc
3204 && (long)value < 0)
3205 continue;
3206
3207 /* So do sp-based offsets. */
3208 if (code >= 0xb0 && code <= 0xb3
3209 && (long)value < 0)
3210 continue;
3211
3212 /* Note that we've changed the relocation contents, etc. */
3213 elf_section_data (sec)->relocs = internal_relocs;
3214 elf_section_data (sec)->this_hdr.contents = contents;
3215 symtab_hdr->contents = (unsigned char *) isymbuf;
3216
3217 /* Fix the opcode. */
3218 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
3219 bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
3220
3221 /* Fix the relocation's type. */
3222 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3223 (ELF32_R_TYPE (irel->r_info)
3224 == (int) R_MN10300_GOTOFF32)
3225 ? R_MN10300_GOTOFF16
3226 : (ELF32_R_TYPE (irel->r_info)
3227 == (int) R_MN10300_GOT32)
3228 ? R_MN10300_GOT16
3229 : (ELF32_R_TYPE (irel->r_info)
3230 == (int) R_MN10300_GOTPC32)
3231 ? R_MN10300_GOTPC16 :
3232 R_MN10300_16);
3233
3234 /* Delete two bytes of data. */
3235 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3236 irel->r_offset + 2, 2))
3237 goto error_return;
3238
3239 /* That will change things, so, we should relax again.
3240 Note that this is not required, and it may be slow. */
3241 *again = TRUE;
3242 break;
3243 }
3244 else if (code == 0xfe)
3245 {
3246 /* add imm32,sp -> add imm16,sp */
3247
3248 /* Note that we've changed the relocation contents, etc. */
3249 elf_section_data (sec)->relocs = internal_relocs;
3250 elf_section_data (sec)->this_hdr.contents = contents;
3251 symtab_hdr->contents = (unsigned char *) isymbuf;
3252
3253 /* Fix the opcode. */
3254 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
3255 bfd_put_8 (abfd, 0xfe, contents + irel->r_offset - 1);
3256
3257 /* Fix the relocation's type. */
3258 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3259 (ELF32_R_TYPE (irel->r_info)
3260 == (int) R_MN10300_GOT32)
3261 ? R_MN10300_GOT16
3262 : (ELF32_R_TYPE (irel->r_info)
3263 == (int) R_MN10300_GOTOFF32)
3264 ? R_MN10300_GOTOFF16
3265 : (ELF32_R_TYPE (irel->r_info)
3266 == (int) R_MN10300_GOTPC32)
3267 ? R_MN10300_GOTPC16 :
3268 R_MN10300_16);
3269
3270 /* Delete two bytes of data. */
3271 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3272 irel->r_offset + 2, 2))
3273 goto error_return;
3274
3275 /* That will change things, so, we should relax again.
3276 Note that this is not required, and it may be slow. */
3277 *again = TRUE;
3278 break;
3279 }
3280 }
3281 }
3282 }
3283
3284 if (isymbuf != NULL
3285 && symtab_hdr->contents != (unsigned char *) isymbuf)
3286 {
3287 if (! link_info->keep_memory)
3288 free (isymbuf);
3289 else
3290 {
3291 /* Cache the symbols for elf_link_input_bfd. */
3292 symtab_hdr->contents = (unsigned char *) isymbuf;
3293 }
3294 }
3295
3296 if (contents != NULL
3297 && elf_section_data (sec)->this_hdr.contents != contents)
3298 {
3299 if (! link_info->keep_memory)
3300 free (contents);
3301 else
3302 {
3303 /* Cache the section contents for elf_link_input_bfd. */
3304 elf_section_data (sec)->this_hdr.contents = contents;
3305 }
3306 }
3307
3308 if (internal_relocs != NULL
3309 && elf_section_data (sec)->relocs != internal_relocs)
3310 free (internal_relocs);
3311
3312 return TRUE;
3313
3314 error_return:
3315 if (isymbuf != NULL
3316 && symtab_hdr->contents != (unsigned char *) isymbuf)
3317 free (isymbuf);
3318 if (contents != NULL
3319 && elf_section_data (section)->this_hdr.contents != contents)
3320 free (contents);
3321 if (internal_relocs != NULL
3322 && elf_section_data (section)->relocs != internal_relocs)
3323 free (internal_relocs);
3324
3325 return FALSE;
3326 }
3327
3328 /* Compute the stack size and movm arguments for the function
3329 referred to by HASH at address ADDR in section with
3330 contents CONTENTS, store the information in the hash table. */
3331 static void
3332 compute_function_info (abfd, hash, addr, contents)
3333 bfd *abfd;
3334 struct elf32_mn10300_link_hash_entry *hash;
3335 bfd_vma addr;
3336 unsigned char *contents;
3337 {
3338 unsigned char byte1, byte2;
3339 /* We only care about a very small subset of the possible prologue
3340 sequences here. Basically we look for:
3341
3342 movm [d2,d3,a2,a3],sp (optional)
3343 add <size>,sp (optional, and only for sizes which fit in an unsigned
3344 8 bit number)
3345
3346 If we find anything else, we quit. */
3347
3348 /* Look for movm [regs],sp */
3349 byte1 = bfd_get_8 (abfd, contents + addr);
3350 byte2 = bfd_get_8 (abfd, contents + addr + 1);
3351
3352 if (byte1 == 0xcf)
3353 {
3354 hash->movm_args = byte2;
3355 addr += 2;
3356 byte1 = bfd_get_8 (abfd, contents + addr);
3357 byte2 = bfd_get_8 (abfd, contents + addr + 1);
3358 }
3359
3360 /* Now figure out how much stack space will be allocated by the movm
3361 instruction. We need this kept separate from the function's normal
3362 stack space. */
3363 if (hash->movm_args)
3364 {
3365 /* Space for d2. */
3366 if (hash->movm_args & 0x80)
3367 hash->movm_stack_size += 4;
3368
3369 /* Space for d3. */
3370 if (hash->movm_args & 0x40)
3371 hash->movm_stack_size += 4;
3372
3373 /* Space for a2. */
3374 if (hash->movm_args & 0x20)
3375 hash->movm_stack_size += 4;
3376
3377 /* Space for a3. */
3378 if (hash->movm_args & 0x10)
3379 hash->movm_stack_size += 4;
3380
3381 /* "other" space. d0, d1, a0, a1, mdr, lir, lar, 4 byte pad. */
3382 if (hash->movm_args & 0x08)
3383 hash->movm_stack_size += 8 * 4;
3384
3385 if (bfd_get_mach (abfd) == bfd_mach_am33
3386 || bfd_get_mach (abfd) == bfd_mach_am33_2)
3387 {
3388 /* "exother" space. e0, e1, mdrq, mcrh, mcrl, mcvf */
3389 if (hash->movm_args & 0x1)
3390 hash->movm_stack_size += 6 * 4;
3391
3392 /* exreg1 space. e4, e5, e6, e7 */
3393 if (hash->movm_args & 0x2)
3394 hash->movm_stack_size += 4 * 4;
3395
3396 /* exreg0 space. e2, e3 */
3397 if (hash->movm_args & 0x4)
3398 hash->movm_stack_size += 2 * 4;
3399 }
3400 }
3401
3402 /* Now look for the two stack adjustment variants. */
3403 if (byte1 == 0xf8 && byte2 == 0xfe)
3404 {
3405 int temp = bfd_get_8 (abfd, contents + addr + 2);
3406 temp = ((temp & 0xff) ^ (~0x7f)) + 0x80;
3407
3408 hash->stack_size = -temp;
3409 }
3410 else if (byte1 == 0xfa && byte2 == 0xfe)
3411 {
3412 int temp = bfd_get_16 (abfd, contents + addr + 2);
3413 temp = ((temp & 0xffff) ^ (~0x7fff)) + 0x8000;
3414 temp = -temp;
3415
3416 if (temp < 255)
3417 hash->stack_size = temp;
3418 }
3419
3420 /* If the total stack to be allocated by the call instruction is more
3421 than 255 bytes, then we can't remove the stack adjustment by using
3422 "call" (we might still be able to remove the "movm" instruction. */
3423 if (hash->stack_size + hash->movm_stack_size > 255)
3424 hash->stack_size = 0;
3425
3426 return;
3427 }
3428
3429 /* Delete some bytes from a section while relaxing. */
3430
3431 static bfd_boolean
3432 mn10300_elf_relax_delete_bytes (abfd, sec, addr, count)
3433 bfd *abfd;
3434 asection *sec;
3435 bfd_vma addr;
3436 int count;
3437 {
3438 Elf_Internal_Shdr *symtab_hdr;
3439 unsigned int sec_shndx;
3440 bfd_byte *contents;
3441 Elf_Internal_Rela *irel, *irelend;
3442 Elf_Internal_Rela *irelalign;
3443 bfd_vma toaddr;
3444 Elf_Internal_Sym *isym, *isymend;
3445 struct elf_link_hash_entry **sym_hashes;
3446 struct elf_link_hash_entry **end_hashes;
3447 unsigned int symcount;
3448
3449 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
3450
3451 contents = elf_section_data (sec)->this_hdr.contents;
3452
3453 /* The deletion must stop at the next ALIGN reloc for an aligment
3454 power larger than the number of bytes we are deleting. */
3455
3456 irelalign = NULL;
3457 toaddr = sec->size;
3458
3459 irel = elf_section_data (sec)->relocs;
3460 irelend = irel + sec->reloc_count;
3461
3462 /* Actually delete the bytes. */
3463 memmove (contents + addr, contents + addr + count,
3464 (size_t) (toaddr - addr - count));
3465 sec->size -= count;
3466
3467 /* Adjust all the relocs. */
3468 for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
3469 {
3470 /* Get the new reloc address. */
3471 if ((irel->r_offset > addr
3472 && irel->r_offset < toaddr))
3473 irel->r_offset -= count;
3474 }
3475
3476 /* Adjust the local symbols defined in this section. */
3477 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3478 isym = (Elf_Internal_Sym *) symtab_hdr->contents;
3479 for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
3480 {
3481 if (isym->st_shndx == sec_shndx
3482 && isym->st_value > addr
3483 && isym->st_value < toaddr)
3484 isym->st_value -= count;
3485 }
3486
3487 /* Now adjust the global symbols defined in this section. */
3488 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
3489 - symtab_hdr->sh_info);
3490 sym_hashes = elf_sym_hashes (abfd);
3491 end_hashes = sym_hashes + symcount;
3492 for (; sym_hashes < end_hashes; sym_hashes++)
3493 {
3494 struct elf_link_hash_entry *sym_hash = *sym_hashes;
3495 if ((sym_hash->root.type == bfd_link_hash_defined
3496 || sym_hash->root.type == bfd_link_hash_defweak)
3497 && sym_hash->root.u.def.section == sec
3498 && sym_hash->root.u.def.value > addr
3499 && sym_hash->root.u.def.value < toaddr)
3500 {
3501 sym_hash->root.u.def.value -= count;
3502 }
3503 }
3504
3505 return TRUE;
3506 }
3507
3508 /* Return TRUE if a symbol exists at the given address, else return
3509 FALSE. */
3510 static bfd_boolean
3511 mn10300_elf_symbol_address_p (abfd, sec, isym, addr)
3512 bfd *abfd;
3513 asection *sec;
3514 Elf_Internal_Sym *isym;
3515 bfd_vma addr;
3516 {
3517 Elf_Internal_Shdr *symtab_hdr;
3518 unsigned int sec_shndx;
3519 Elf_Internal_Sym *isymend;
3520 struct elf_link_hash_entry **sym_hashes;
3521 struct elf_link_hash_entry **end_hashes;
3522 unsigned int symcount;
3523
3524 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
3525
3526 /* Examine all the symbols. */
3527 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3528 for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
3529 {
3530 if (isym->st_shndx == sec_shndx
3531 && isym->st_value == addr)
3532 return TRUE;
3533 }
3534
3535 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
3536 - symtab_hdr->sh_info);
3537 sym_hashes = elf_sym_hashes (abfd);
3538 end_hashes = sym_hashes + symcount;
3539 for (; sym_hashes < end_hashes; sym_hashes++)
3540 {
3541 struct elf_link_hash_entry *sym_hash = *sym_hashes;
3542 if ((sym_hash->root.type == bfd_link_hash_defined
3543 || sym_hash->root.type == bfd_link_hash_defweak)
3544 && sym_hash->root.u.def.section == sec
3545 && sym_hash->root.u.def.value == addr)
3546 return TRUE;
3547 }
3548
3549 return FALSE;
3550 }
3551
3552 /* This is a version of bfd_generic_get_relocated_section_contents
3553 which uses mn10300_elf_relocate_section. */
3554
3555 static bfd_byte *
3556 mn10300_elf_get_relocated_section_contents (output_bfd, link_info, link_order,
3557 data, relocatable, symbols)
3558 bfd *output_bfd;
3559 struct bfd_link_info *link_info;
3560 struct bfd_link_order *link_order;
3561 bfd_byte *data;
3562 bfd_boolean relocatable;
3563 asymbol **symbols;
3564 {
3565 Elf_Internal_Shdr *symtab_hdr;
3566 asection *input_section = link_order->u.indirect.section;
3567 bfd *input_bfd = input_section->owner;
3568 asection **sections = NULL;
3569 Elf_Internal_Rela *internal_relocs = NULL;
3570 Elf_Internal_Sym *isymbuf = NULL;
3571
3572 /* We only need to handle the case of relaxing, or of having a
3573 particular set of section contents, specially. */
3574 if (relocatable
3575 || elf_section_data (input_section)->this_hdr.contents == NULL)
3576 return bfd_generic_get_relocated_section_contents (output_bfd, link_info,
3577 link_order, data,
3578 relocatable,
3579 symbols);
3580
3581 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3582
3583 memcpy (data, elf_section_data (input_section)->this_hdr.contents,
3584 (size_t) input_section->size);
3585
3586 if ((input_section->flags & SEC_RELOC) != 0
3587 && input_section->reloc_count > 0)
3588 {
3589 asection **secpp;
3590 Elf_Internal_Sym *isym, *isymend;
3591 bfd_size_type amt;
3592
3593 internal_relocs = (_bfd_elf_link_read_relocs
3594 (input_bfd, input_section, (PTR) NULL,
3595 (Elf_Internal_Rela *) NULL, FALSE));
3596 if (internal_relocs == NULL)
3597 goto error_return;
3598
3599 if (symtab_hdr->sh_info != 0)
3600 {
3601 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
3602 if (isymbuf == NULL)
3603 isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
3604 symtab_hdr->sh_info, 0,
3605 NULL, NULL, NULL);
3606 if (isymbuf == NULL)
3607 goto error_return;
3608 }
3609
3610 amt = symtab_hdr->sh_info;
3611 amt *= sizeof (asection *);
3612 sections = (asection **) bfd_malloc (amt);
3613 if (sections == NULL && amt != 0)
3614 goto error_return;
3615
3616 isymend = isymbuf + symtab_hdr->sh_info;
3617 for (isym = isymbuf, secpp = sections; isym < isymend; ++isym, ++secpp)
3618 {
3619 asection *isec;
3620
3621 if (isym->st_shndx == SHN_UNDEF)
3622 isec = bfd_und_section_ptr;
3623 else if (isym->st_shndx == SHN_ABS)
3624 isec = bfd_abs_section_ptr;
3625 else if (isym->st_shndx == SHN_COMMON)
3626 isec = bfd_com_section_ptr;
3627 else
3628 isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx);
3629
3630 *secpp = isec;
3631 }
3632
3633 if (! mn10300_elf_relocate_section (output_bfd, link_info, input_bfd,
3634 input_section, data, internal_relocs,
3635 isymbuf, sections))
3636 goto error_return;
3637
3638 if (sections != NULL)
3639 free (sections);
3640 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
3641 free (isymbuf);
3642 if (internal_relocs != elf_section_data (input_section)->relocs)
3643 free (internal_relocs);
3644 }
3645
3646 return data;
3647
3648 error_return:
3649 if (sections != NULL)
3650 free (sections);
3651 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
3652 free (isymbuf);
3653 if (internal_relocs != NULL
3654 && internal_relocs != elf_section_data (input_section)->relocs)
3655 free (internal_relocs);
3656 return NULL;
3657 }
3658
3659 /* Assorted hash table functions. */
3660
3661 /* Initialize an entry in the link hash table. */
3662
3663 /* Create an entry in an MN10300 ELF linker hash table. */
3664
3665 static struct bfd_hash_entry *
3666 elf32_mn10300_link_hash_newfunc (entry, table, string)
3667 struct bfd_hash_entry *entry;
3668 struct bfd_hash_table *table;
3669 const char *string;
3670 {
3671 struct elf32_mn10300_link_hash_entry *ret =
3672 (struct elf32_mn10300_link_hash_entry *) entry;
3673
3674 /* Allocate the structure if it has not already been allocated by a
3675 subclass. */
3676 if (ret == (struct elf32_mn10300_link_hash_entry *) NULL)
3677 ret = ((struct elf32_mn10300_link_hash_entry *)
3678 bfd_hash_allocate (table,
3679 sizeof (struct elf32_mn10300_link_hash_entry)));
3680 if (ret == (struct elf32_mn10300_link_hash_entry *) NULL)
3681 return (struct bfd_hash_entry *) ret;
3682
3683 /* Call the allocation method of the superclass. */
3684 ret = ((struct elf32_mn10300_link_hash_entry *)
3685 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
3686 table, string));
3687 if (ret != (struct elf32_mn10300_link_hash_entry *) NULL)
3688 {
3689 ret->direct_calls = 0;
3690 ret->stack_size = 0;
3691 ret->movm_args = 0;
3692 ret->movm_stack_size = 0;
3693 ret->flags = 0;
3694 }
3695
3696 return (struct bfd_hash_entry *) ret;
3697 }
3698
3699 /* Create an mn10300 ELF linker hash table. */
3700
3701 static struct bfd_link_hash_table *
3702 elf32_mn10300_link_hash_table_create (abfd)
3703 bfd *abfd;
3704 {
3705 struct elf32_mn10300_link_hash_table *ret;
3706 bfd_size_type amt = sizeof (struct elf32_mn10300_link_hash_table);
3707
3708 ret = (struct elf32_mn10300_link_hash_table *) bfd_malloc (amt);
3709 if (ret == (struct elf32_mn10300_link_hash_table *) NULL)
3710 return NULL;
3711
3712 if (! _bfd_elf_link_hash_table_init (&ret->root, abfd,
3713 elf32_mn10300_link_hash_newfunc))
3714 {
3715 free (ret);
3716 return NULL;
3717 }
3718
3719 ret->flags = 0;
3720 amt = sizeof (struct elf_link_hash_table);
3721 ret->static_hash_table
3722 = (struct elf32_mn10300_link_hash_table *) bfd_malloc (amt);
3723 if (ret->static_hash_table == NULL)
3724 {
3725 free (ret);
3726 return NULL;
3727 }
3728
3729 if (! _bfd_elf_link_hash_table_init (&ret->static_hash_table->root, abfd,
3730 elf32_mn10300_link_hash_newfunc))
3731 {
3732 free (ret->static_hash_table);
3733 free (ret);
3734 return NULL;
3735 }
3736 return &ret->root.root;
3737 }
3738
3739 /* Free an mn10300 ELF linker hash table. */
3740
3741 static void
3742 elf32_mn10300_link_hash_table_free (hash)
3743 struct bfd_link_hash_table *hash;
3744 {
3745 struct elf32_mn10300_link_hash_table *ret
3746 = (struct elf32_mn10300_link_hash_table *) hash;
3747
3748 _bfd_generic_link_hash_table_free
3749 ((struct bfd_link_hash_table *) ret->static_hash_table);
3750 _bfd_generic_link_hash_table_free
3751 ((struct bfd_link_hash_table *) ret);
3752 }
3753
3754 static unsigned long
3755 elf_mn10300_mach (flags)
3756 flagword flags;
3757 {
3758 switch (flags & EF_MN10300_MACH)
3759 {
3760 case E_MN10300_MACH_MN10300:
3761 default:
3762 return bfd_mach_mn10300;
3763
3764 case E_MN10300_MACH_AM33:
3765 return bfd_mach_am33;
3766
3767 case E_MN10300_MACH_AM33_2:
3768 return bfd_mach_am33_2;
3769 }
3770 }
3771
3772 /* The final processing done just before writing out a MN10300 ELF object
3773 file. This gets the MN10300 architecture right based on the machine
3774 number. */
3775
3776 void
3777 _bfd_mn10300_elf_final_write_processing (abfd, linker)
3778 bfd *abfd;
3779 bfd_boolean linker ATTRIBUTE_UNUSED;
3780 {
3781 unsigned long val;
3782
3783 switch (bfd_get_mach (abfd))
3784 {
3785 default:
3786 case bfd_mach_mn10300:
3787 val = E_MN10300_MACH_MN10300;
3788 break;
3789
3790 case bfd_mach_am33:
3791 val = E_MN10300_MACH_AM33;
3792 break;
3793
3794 case bfd_mach_am33_2:
3795 val = E_MN10300_MACH_AM33_2;
3796 break;
3797 }
3798
3799 elf_elfheader (abfd)->e_flags &= ~ (EF_MN10300_MACH);
3800 elf_elfheader (abfd)->e_flags |= val;
3801 }
3802
3803 bfd_boolean
3804 _bfd_mn10300_elf_object_p (abfd)
3805 bfd *abfd;
3806 {
3807 bfd_default_set_arch_mach (abfd, bfd_arch_mn10300,
3808 elf_mn10300_mach (elf_elfheader (abfd)->e_flags));
3809 return TRUE;
3810 }
3811
3812 /* Merge backend specific data from an object file to the output
3813 object file when linking. */
3814
3815 bfd_boolean
3816 _bfd_mn10300_elf_merge_private_bfd_data (ibfd, obfd)
3817 bfd *ibfd;
3818 bfd *obfd;
3819 {
3820 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3821 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3822 return TRUE;
3823
3824 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
3825 && bfd_get_mach (obfd) < bfd_get_mach (ibfd))
3826 {
3827 if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd),
3828 bfd_get_mach (ibfd)))
3829 return FALSE;
3830 }
3831
3832 return TRUE;
3833 }
3834
3835 #define PLT0_ENTRY_SIZE 15
3836 #define PLT_ENTRY_SIZE 20
3837 #define PIC_PLT_ENTRY_SIZE 24
3838
3839 static const bfd_byte elf_mn10300_plt0_entry[PLT0_ENTRY_SIZE] =
3840 {
3841 0xfc, 0xa0, 0, 0, 0, 0, /* mov (.got+8),a0 */
3842 0xfe, 0xe, 0x10, 0, 0, 0, 0, /* mov (.got+4),r1 */
3843 0xf0, 0xf4, /* jmp (a0) */
3844 };
3845
3846 static const bfd_byte elf_mn10300_plt_entry[PLT_ENTRY_SIZE] =
3847 {
3848 0xfc, 0xa0, 0, 0, 0, 0, /* mov (nameN@GOT + .got),a0 */
3849 0xf0, 0xf4, /* jmp (a0) */
3850 0xfe, 8, 0, 0, 0, 0, 0, /* mov reloc-table-address,r0 */
3851 0xdc, 0, 0, 0, 0, /* jmp .plt0 */
3852 };
3853
3854 static const bfd_byte elf_mn10300_pic_plt_entry[PIC_PLT_ENTRY_SIZE] =
3855 {
3856 0xfc, 0x22, 0, 0, 0, 0, /* mov (nameN@GOT,a2),a0 */
3857 0xf0, 0xf4, /* jmp (a0) */
3858 0xfe, 8, 0, 0, 0, 0, 0, /* mov reloc-table-address,r0 */
3859 0xf8, 0x22, 8, /* mov (8,a2),a0 */
3860 0xfb, 0xa, 0x1a, 4, /* mov (4,a2),r1 */
3861 0xf0, 0xf4, /* jmp (a0) */
3862 };
3863
3864 /* Return size of the first PLT entry. */
3865 #define elf_mn10300_sizeof_plt0(info) \
3866 (info->shared ? PIC_PLT_ENTRY_SIZE : PLT0_ENTRY_SIZE)
3867
3868 /* Return size of a PLT entry. */
3869 #define elf_mn10300_sizeof_plt(info) \
3870 (info->shared ? PIC_PLT_ENTRY_SIZE : PLT_ENTRY_SIZE)
3871
3872 /* Return offset of the PLT0 address in an absolute PLT entry. */
3873 #define elf_mn10300_plt_plt0_offset(info) 16
3874
3875 /* Return offset of the linker in PLT0 entry. */
3876 #define elf_mn10300_plt0_linker_offset(info) 2
3877
3878 /* Return offset of the GOT id in PLT0 entry. */
3879 #define elf_mn10300_plt0_gotid_offset(info) 9
3880
3881 /* Return offset of the temporary in PLT entry */
3882 #define elf_mn10300_plt_temp_offset(info) 8
3883
3884 /* Return offset of the symbol in PLT entry. */
3885 #define elf_mn10300_plt_symbol_offset(info) 2
3886
3887 /* Return offset of the relocation in PLT entry. */
3888 #define elf_mn10300_plt_reloc_offset(info) 11
3889
3890 /* The name of the dynamic interpreter. This is put in the .interp
3891 section. */
3892
3893 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
3894
3895 /* Create dynamic sections when linking against a dynamic object. */
3896
3897 static bfd_boolean
3898 _bfd_mn10300_elf_create_dynamic_sections (abfd, info)
3899 bfd *abfd;
3900 struct bfd_link_info *info;
3901 {
3902 flagword flags;
3903 asection * s;
3904 const struct elf_backend_data * bed = get_elf_backend_data (abfd);
3905 int ptralign = 0;
3906
3907 switch (bed->s->arch_size)
3908 {
3909 case 32:
3910 ptralign = 2;
3911 break;
3912
3913 case 64:
3914 ptralign = 3;
3915 break;
3916
3917 default:
3918 bfd_set_error (bfd_error_bad_value);
3919 return FALSE;
3920 }
3921
3922 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
3923 .rel[a].bss sections. */
3924
3925 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3926 | SEC_LINKER_CREATED);
3927
3928 s = bfd_make_section (abfd,
3929 bed->default_use_rela_p ? ".rela.plt" : ".rel.plt");
3930 if (s == NULL
3931 || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
3932 || ! bfd_set_section_alignment (abfd, s, ptralign))
3933 return FALSE;
3934
3935 if (! _bfd_mn10300_elf_create_got_section (abfd, info))
3936 return FALSE;
3937
3938 {
3939 const char * secname;
3940 char * relname;
3941 flagword secflags;
3942 asection * sec;
3943
3944 for (sec = abfd->sections; sec; sec = sec->next)
3945 {
3946 secflags = bfd_get_section_flags (abfd, sec);
3947 if ((secflags & (SEC_DATA | SEC_LINKER_CREATED))
3948 || ((secflags & SEC_HAS_CONTENTS) != SEC_HAS_CONTENTS))
3949 continue;
3950
3951 secname = bfd_get_section_name (abfd, sec);
3952 relname = (char *) bfd_malloc (strlen (secname) + 6);
3953 strcpy (relname, ".rela");
3954 strcat (relname, secname);
3955
3956 s = bfd_make_section (abfd, relname);
3957 if (s == NULL
3958 || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
3959 || ! bfd_set_section_alignment (abfd, s, ptralign))
3960 return FALSE;
3961 }
3962 }
3963
3964 if (bed->want_dynbss)
3965 {
3966 /* The .dynbss section is a place to put symbols which are defined
3967 by dynamic objects, are referenced by regular objects, and are
3968 not functions. We must allocate space for them in the process
3969 image and use a R_*_COPY reloc to tell the dynamic linker to
3970 initialize them at run time. The linker script puts the .dynbss
3971 section into the .bss section of the final image. */
3972 s = bfd_make_section (abfd, ".dynbss");
3973 if (s == NULL
3974 || ! bfd_set_section_flags (abfd, s, SEC_ALLOC))
3975 return FALSE;
3976
3977 /* The .rel[a].bss section holds copy relocs. This section is not
3978 normally needed. We need to create it here, though, so that the
3979 linker will map it to an output section. We can't just create it
3980 only if we need it, because we will not know whether we need it
3981 until we have seen all the input files, and the first time the
3982 main linker code calls BFD after examining all the input files
3983 (size_dynamic_sections) the input sections have already been
3984 mapped to the output sections. If the section turns out not to
3985 be needed, we can discard it later. We will never need this
3986 section when generating a shared object, since they do not use
3987 copy relocs. */
3988 if (! info->shared)
3989 {
3990 s = bfd_make_section (abfd,
3991 (bed->default_use_rela_p
3992 ? ".rela.bss" : ".rel.bss"));
3993 if (s == NULL
3994 || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
3995 || ! bfd_set_section_alignment (abfd, s, ptralign))
3996 return FALSE;
3997 }
3998 }
3999
4000 return TRUE;
4001 }
4002 \f
4003 /* Adjust a symbol defined by a dynamic object and referenced by a
4004 regular object. The current definition is in some section of the
4005 dynamic object, but we're not including those sections. We have to
4006 change the definition to something the rest of the link can
4007 understand. */
4008
4009 static bfd_boolean
4010 _bfd_mn10300_elf_adjust_dynamic_symbol (info, h)
4011 struct bfd_link_info * info;
4012 struct elf_link_hash_entry * h;
4013 {
4014 bfd * dynobj;
4015 asection * s;
4016 unsigned int power_of_two;
4017
4018 dynobj = elf_hash_table (info)->dynobj;
4019
4020 /* Make sure we know what is going on here. */
4021 BFD_ASSERT (dynobj != NULL
4022 && (h->needs_plt
4023 || h->u.weakdef != NULL
4024 || (h->def_dynamic
4025 && h->ref_regular
4026 && !h->def_regular)));
4027
4028 /* If this is a function, put it in the procedure linkage table. We
4029 will fill in the contents of the procedure linkage table later,
4030 when we know the address of the .got section. */
4031 if (h->type == STT_FUNC
4032 || h->needs_plt)
4033 {
4034 if (! info->shared
4035 && !h->def_dynamic
4036 && !h->ref_dynamic)
4037 {
4038 /* This case can occur if we saw a PLT reloc in an input
4039 file, but the symbol was never referred to by a dynamic
4040 object. In such a case, we don't actually need to build
4041 a procedure linkage table, and we can just do a REL32
4042 reloc instead. */
4043 BFD_ASSERT (h->needs_plt);
4044 return TRUE;
4045 }
4046
4047 /* Make sure this symbol is output as a dynamic symbol. */
4048 if (h->dynindx == -1)
4049 {
4050 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4051 return FALSE;
4052 }
4053
4054 s = bfd_get_section_by_name (dynobj, ".plt");
4055 BFD_ASSERT (s != NULL);
4056
4057 /* If this is the first .plt entry, make room for the special
4058 first entry. */
4059 if (s->size == 0)
4060 s->size += elf_mn10300_sizeof_plt0 (info);
4061
4062 /* If this symbol is not defined in a regular file, and we are
4063 not generating a shared library, then set the symbol to this
4064 location in the .plt. This is required to make function
4065 pointers compare as equal between the normal executable and
4066 the shared library. */
4067 if (! info->shared
4068 && !h->def_regular)
4069 {
4070 h->root.u.def.section = s;
4071 h->root.u.def.value = s->size;
4072 }
4073
4074 h->plt.offset = s->size;
4075
4076 /* Make room for this entry. */
4077 s->size += elf_mn10300_sizeof_plt (info);
4078
4079 /* We also need to make an entry in the .got.plt section, which
4080 will be placed in the .got section by the linker script. */
4081
4082 s = bfd_get_section_by_name (dynobj, ".got.plt");
4083 BFD_ASSERT (s != NULL);
4084 s->size += 4;
4085
4086 /* We also need to make an entry in the .rela.plt section. */
4087
4088 s = bfd_get_section_by_name (dynobj, ".rela.plt");
4089 BFD_ASSERT (s != NULL);
4090 s->size += sizeof (Elf32_External_Rela);
4091
4092 return TRUE;
4093 }
4094
4095 /* If this is a weak symbol, and there is a real definition, the
4096 processor independent code will have arranged for us to see the
4097 real definition first, and we can just use the same value. */
4098 if (h->u.weakdef != NULL)
4099 {
4100 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4101 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4102 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4103 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4104 return TRUE;
4105 }
4106
4107 /* This is a reference to a symbol defined by a dynamic object which
4108 is not a function. */
4109
4110 /* If we are creating a shared library, we must presume that the
4111 only references to the symbol are via the global offset table.
4112 For such cases we need not do anything here; the relocations will
4113 be handled correctly by relocate_section. */
4114 if (info->shared)
4115 return TRUE;
4116
4117 /* If there are no references to this symbol that do not use the
4118 GOT, we don't need to generate a copy reloc. */
4119 if (!h->non_got_ref)
4120 return TRUE;
4121
4122 /* We must allocate the symbol in our .dynbss section, which will
4123 become part of the .bss section of the executable. There will be
4124 an entry for this symbol in the .dynsym section. The dynamic
4125 object will contain position independent code, so all references
4126 from the dynamic object to this symbol will go through the global
4127 offset table. The dynamic linker will use the .dynsym entry to
4128 determine the address it must put in the global offset table, so
4129 both the dynamic object and the regular object will refer to the
4130 same memory location for the variable. */
4131
4132 s = bfd_get_section_by_name (dynobj, ".dynbss");
4133 BFD_ASSERT (s != NULL);
4134
4135 /* We must generate a R_MN10300_COPY reloc to tell the dynamic linker to
4136 copy the initial value out of the dynamic object and into the
4137 runtime process image. We need to remember the offset into the
4138 .rela.bss section we are going to use. */
4139 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4140 {
4141 asection * srel;
4142
4143 srel = bfd_get_section_by_name (dynobj, ".rela.bss");
4144 BFD_ASSERT (srel != NULL);
4145 srel->size += sizeof (Elf32_External_Rela);
4146 h->needs_copy = 1;
4147 }
4148
4149 /* We need to figure out the alignment required for this symbol. I
4150 have no idea how ELF linkers handle this. */
4151 power_of_two = bfd_log2 (h->size);
4152 if (power_of_two > 3)
4153 power_of_two = 3;
4154
4155 /* Apply the required alignment. */
4156 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
4157 if (power_of_two > bfd_get_section_alignment (dynobj, s))
4158 {
4159 if (! bfd_set_section_alignment (dynobj, s, power_of_two))
4160 return FALSE;
4161 }
4162
4163 /* Define the symbol as being at this point in the section. */
4164 h->root.u.def.section = s;
4165 h->root.u.def.value = s->size;
4166
4167 /* Increment the section size to make room for the symbol. */
4168 s->size += h->size;
4169
4170 return TRUE;
4171 }
4172
4173 /* Set the sizes of the dynamic sections. */
4174
4175 static bfd_boolean
4176 _bfd_mn10300_elf_size_dynamic_sections (output_bfd, info)
4177 bfd * output_bfd;
4178 struct bfd_link_info * info;
4179 {
4180 bfd * dynobj;
4181 asection * s;
4182 bfd_boolean plt;
4183 bfd_boolean relocs;
4184 bfd_boolean reltext;
4185
4186 dynobj = elf_hash_table (info)->dynobj;
4187 BFD_ASSERT (dynobj != NULL);
4188
4189 if (elf_hash_table (info)->dynamic_sections_created)
4190 {
4191 /* Set the contents of the .interp section to the interpreter. */
4192 if (info->executable)
4193 {
4194 s = bfd_get_section_by_name (dynobj, ".interp");
4195 BFD_ASSERT (s != NULL);
4196 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4197 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
4198 }
4199 }
4200 else
4201 {
4202 /* We may have created entries in the .rela.got section.
4203 However, if we are not creating the dynamic sections, we will
4204 not actually use these entries. Reset the size of .rela.got,
4205 which will cause it to get stripped from the output file
4206 below. */
4207 s = bfd_get_section_by_name (dynobj, ".rela.got");
4208 if (s != NULL)
4209 s->size = 0;
4210 }
4211
4212 /* The check_relocs and adjust_dynamic_symbol entry points have
4213 determined the sizes of the various dynamic sections. Allocate
4214 memory for them. */
4215 plt = FALSE;
4216 relocs = FALSE;
4217 reltext = FALSE;
4218 for (s = dynobj->sections; s != NULL; s = s->next)
4219 {
4220 const char * name;
4221 bfd_boolean strip;
4222
4223 if ((s->flags & SEC_LINKER_CREATED) == 0)
4224 continue;
4225
4226 /* It's OK to base decisions on the section name, because none
4227 of the dynobj section names depend upon the input files. */
4228 name = bfd_get_section_name (dynobj, s);
4229
4230 strip = FALSE;
4231
4232 if (strcmp (name, ".plt") == 0)
4233 {
4234 if (s->size == 0)
4235 /* Strip this section if we don't need it; see the
4236 comment below. */
4237 strip = TRUE;
4238 else
4239 /* Remember whether there is a PLT. */
4240 plt = TRUE;
4241 }
4242 else if (strncmp (name, ".rela", 5) == 0)
4243 {
4244 if (s->size == 0)
4245 {
4246 /* If we don't need this section, strip it from the
4247 output file. This is mostly to handle .rela.bss and
4248 .rela.plt. We must create both sections in
4249 create_dynamic_sections, because they must be created
4250 before the linker maps input sections to output
4251 sections. The linker does that before
4252 adjust_dynamic_symbol is called, and it is that
4253 function which decides whether anything needs to go
4254 into these sections. */
4255 strip = TRUE;
4256 }
4257 else
4258 {
4259 asection * target;
4260
4261 /* Remember whether there are any reloc sections other
4262 than .rela.plt. */
4263 if (strcmp (name, ".rela.plt") != 0)
4264 {
4265 const char * outname;
4266
4267 relocs = TRUE;
4268
4269 /* If this relocation section applies to a read only
4270 section, then we probably need a DT_TEXTREL
4271 entry. The entries in the .rela.plt section
4272 really apply to the .got section, which we
4273 created ourselves and so know is not readonly. */
4274 outname = bfd_get_section_name (output_bfd,
4275 s->output_section);
4276 target = bfd_get_section_by_name (output_bfd, outname + 5);
4277 if (target != NULL
4278 && (target->flags & SEC_READONLY) != 0
4279 && (target->flags & SEC_ALLOC) != 0)
4280 reltext = TRUE;
4281 }
4282
4283 /* We use the reloc_count field as a counter if we need
4284 to copy relocs into the output file. */
4285 s->reloc_count = 0;
4286 }
4287 }
4288 else if (strncmp (name, ".got", 4) != 0)
4289 /* It's not one of our sections, so don't allocate space. */
4290 continue;
4291
4292 if (strip)
4293 {
4294 _bfd_strip_section_from_output (info, s);
4295 continue;
4296 }
4297
4298 /* Allocate memory for the section contents. We use bfd_zalloc
4299 here in case unused entries are not reclaimed before the
4300 section's contents are written out. This should not happen,
4301 but this way if it does, we get a R_MN10300_NONE reloc
4302 instead of garbage. */
4303 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
4304 if (s->contents == NULL && s->size != 0)
4305 return FALSE;
4306 }
4307
4308 if (elf_hash_table (info)->dynamic_sections_created)
4309 {
4310 /* Add some entries to the .dynamic section. We fill in the
4311 values later, in _bfd_mn10300_elf_finish_dynamic_sections,
4312 but we must add the entries now so that we get the correct
4313 size for the .dynamic section. The DT_DEBUG entry is filled
4314 in by the dynamic linker and used by the debugger. */
4315 if (! info->shared)
4316 {
4317 if (!_bfd_elf_add_dynamic_entry (info, DT_DEBUG, 0))
4318 return FALSE;
4319 }
4320
4321 if (plt)
4322 {
4323 if (!_bfd_elf_add_dynamic_entry (info, DT_PLTGOT, 0)
4324 || !_bfd_elf_add_dynamic_entry (info, DT_PLTRELSZ, 0)
4325 || !_bfd_elf_add_dynamic_entry (info, DT_PLTREL, DT_RELA)
4326 || !_bfd_elf_add_dynamic_entry (info, DT_JMPREL, 0))
4327 return FALSE;
4328 }
4329
4330 if (relocs)
4331 {
4332 if (!_bfd_elf_add_dynamic_entry (info, DT_RELA, 0)
4333 || !_bfd_elf_add_dynamic_entry (info, DT_RELASZ, 0)
4334 || !_bfd_elf_add_dynamic_entry (info, DT_RELAENT,
4335 sizeof (Elf32_External_Rela)))
4336 return FALSE;
4337 }
4338
4339 if (reltext)
4340 {
4341 if (!_bfd_elf_add_dynamic_entry (info, DT_TEXTREL, 0))
4342 return FALSE;
4343 }
4344 }
4345
4346 return TRUE;
4347 }
4348
4349 /* Finish up dynamic symbol handling. We set the contents of various
4350 dynamic sections here. */
4351
4352 static bfd_boolean
4353 _bfd_mn10300_elf_finish_dynamic_symbol (output_bfd, info, h, sym)
4354 bfd * output_bfd;
4355 struct bfd_link_info * info;
4356 struct elf_link_hash_entry * h;
4357 Elf_Internal_Sym * sym;
4358 {
4359 bfd * dynobj;
4360
4361 dynobj = elf_hash_table (info)->dynobj;
4362
4363 if (h->plt.offset != (bfd_vma) -1)
4364 {
4365 asection * splt;
4366 asection * sgot;
4367 asection * srel;
4368 bfd_vma plt_index;
4369 bfd_vma got_offset;
4370 Elf_Internal_Rela rel;
4371
4372 /* This symbol has an entry in the procedure linkage table. Set
4373 it up. */
4374
4375 BFD_ASSERT (h->dynindx != -1);
4376
4377 splt = bfd_get_section_by_name (dynobj, ".plt");
4378 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
4379 srel = bfd_get_section_by_name (dynobj, ".rela.plt");
4380 BFD_ASSERT (splt != NULL && sgot != NULL && srel != NULL);
4381
4382 /* Get the index in the procedure linkage table which
4383 corresponds to this symbol. This is the index of this symbol
4384 in all the symbols for which we are making plt entries. The
4385 first entry in the procedure linkage table is reserved. */
4386 plt_index = ((h->plt.offset - elf_mn10300_sizeof_plt0 (info))
4387 / elf_mn10300_sizeof_plt (info));
4388
4389 /* Get the offset into the .got table of the entry that
4390 corresponds to this function. Each .got entry is 4 bytes.
4391 The first three are reserved. */
4392 got_offset = (plt_index + 3) * 4;
4393
4394 /* Fill in the entry in the procedure linkage table. */
4395 if (! info->shared)
4396 {
4397 memcpy (splt->contents + h->plt.offset, elf_mn10300_plt_entry,
4398 elf_mn10300_sizeof_plt (info));
4399 bfd_put_32 (output_bfd,
4400 (sgot->output_section->vma
4401 + sgot->output_offset
4402 + got_offset),
4403 (splt->contents + h->plt.offset
4404 + elf_mn10300_plt_symbol_offset (info)));
4405
4406 bfd_put_32 (output_bfd,
4407 (1 - h->plt.offset - elf_mn10300_plt_plt0_offset (info)),
4408 (splt->contents + h->plt.offset
4409 + elf_mn10300_plt_plt0_offset (info)));
4410 }
4411 else
4412 {
4413 memcpy (splt->contents + h->plt.offset, elf_mn10300_pic_plt_entry,
4414 elf_mn10300_sizeof_plt (info));
4415
4416 bfd_put_32 (output_bfd, got_offset,
4417 (splt->contents + h->plt.offset
4418 + elf_mn10300_plt_symbol_offset (info)));
4419 }
4420
4421 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
4422 (splt->contents + h->plt.offset
4423 + elf_mn10300_plt_reloc_offset (info)));
4424
4425 /* Fill in the entry in the global offset table. */
4426 bfd_put_32 (output_bfd,
4427 (splt->output_section->vma
4428 + splt->output_offset
4429 + h->plt.offset
4430 + elf_mn10300_plt_temp_offset (info)),
4431 sgot->contents + got_offset);
4432
4433 /* Fill in the entry in the .rela.plt section. */
4434 rel.r_offset = (sgot->output_section->vma
4435 + sgot->output_offset
4436 + got_offset);
4437 rel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_JMP_SLOT);
4438 rel.r_addend = 0;
4439 bfd_elf32_swap_reloca_out (output_bfd, &rel,
4440 (bfd_byte *) ((Elf32_External_Rela *) srel->contents
4441 + plt_index));
4442
4443 if (!h->def_regular)
4444 /* Mark the symbol as undefined, rather than as defined in
4445 the .plt section. Leave the value alone. */
4446 sym->st_shndx = SHN_UNDEF;
4447 }
4448
4449 if (h->got.offset != (bfd_vma) -1)
4450 {
4451 asection * sgot;
4452 asection * srel;
4453 Elf_Internal_Rela rel;
4454
4455 /* This symbol has an entry in the global offset table. Set it up. */
4456
4457 sgot = bfd_get_section_by_name (dynobj, ".got");
4458 srel = bfd_get_section_by_name (dynobj, ".rela.got");
4459 BFD_ASSERT (sgot != NULL && srel != NULL);
4460
4461 rel.r_offset = (sgot->output_section->vma
4462 + sgot->output_offset
4463 + (h->got.offset &~ 1));
4464
4465 /* If this is a -Bsymbolic link, and the symbol is defined
4466 locally, we just want to emit a RELATIVE reloc. Likewise if
4467 the symbol was forced to be local because of a version file.
4468 The entry in the global offset table will already have been
4469 initialized in the relocate_section function. */
4470 if (info->shared
4471 && (info->symbolic || h->dynindx == -1)
4472 && h->def_regular)
4473 {
4474 rel.r_info = ELF32_R_INFO (0, R_MN10300_RELATIVE);
4475 rel.r_addend = (h->root.u.def.value
4476 + h->root.u.def.section->output_section->vma
4477 + h->root.u.def.section->output_offset);
4478 }
4479 else
4480 {
4481 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
4482 rel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_GLOB_DAT);
4483 rel.r_addend = 0;
4484 }
4485
4486 bfd_elf32_swap_reloca_out (output_bfd, &rel,
4487 (bfd_byte *) ((Elf32_External_Rela *) srel->contents
4488 + srel->reloc_count));
4489 ++ srel->reloc_count;
4490 }
4491
4492 if (h->needs_copy)
4493 {
4494 asection * s;
4495 Elf_Internal_Rela rel;
4496
4497 /* This symbol needs a copy reloc. Set it up. */
4498 BFD_ASSERT (h->dynindx != -1
4499 && (h->root.type == bfd_link_hash_defined
4500 || h->root.type == bfd_link_hash_defweak));
4501
4502 s = bfd_get_section_by_name (h->root.u.def.section->owner,
4503 ".rela.bss");
4504 BFD_ASSERT (s != NULL);
4505
4506 rel.r_offset = (h->root.u.def.value
4507 + h->root.u.def.section->output_section->vma
4508 + h->root.u.def.section->output_offset);
4509 rel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_COPY);
4510 rel.r_addend = 0;
4511 bfd_elf32_swap_reloca_out (output_bfd, &rel,
4512 (bfd_byte *) ((Elf32_External_Rela *) s->contents
4513 + s->reloc_count));
4514 ++ s->reloc_count;
4515 }
4516
4517 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
4518 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
4519 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
4520 sym->st_shndx = SHN_ABS;
4521
4522 return TRUE;
4523 }
4524
4525 /* Finish up the dynamic sections. */
4526
4527 static bfd_boolean
4528 _bfd_mn10300_elf_finish_dynamic_sections (output_bfd, info)
4529 bfd * output_bfd;
4530 struct bfd_link_info * info;
4531 {
4532 bfd * dynobj;
4533 asection * sgot;
4534 asection * sdyn;
4535
4536 dynobj = elf_hash_table (info)->dynobj;
4537
4538 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
4539 BFD_ASSERT (sgot != NULL);
4540 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
4541
4542 if (elf_hash_table (info)->dynamic_sections_created)
4543 {
4544 asection * splt;
4545 Elf32_External_Dyn * dyncon;
4546 Elf32_External_Dyn * dynconend;
4547
4548 BFD_ASSERT (sdyn != NULL);
4549
4550 dyncon = (Elf32_External_Dyn *) sdyn->contents;
4551 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
4552
4553 for (; dyncon < dynconend; dyncon++)
4554 {
4555 Elf_Internal_Dyn dyn;
4556 const char * name;
4557 asection * s;
4558
4559 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4560
4561 switch (dyn.d_tag)
4562 {
4563 default:
4564 break;
4565
4566 case DT_PLTGOT:
4567 name = ".got";
4568 goto get_vma;
4569
4570 case DT_JMPREL:
4571 name = ".rela.plt";
4572 get_vma:
4573 s = bfd_get_section_by_name (output_bfd, name);
4574 BFD_ASSERT (s != NULL);
4575 dyn.d_un.d_ptr = s->vma;
4576 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4577 break;
4578
4579 case DT_PLTRELSZ:
4580 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
4581 BFD_ASSERT (s != NULL);
4582 dyn.d_un.d_val = s->size;
4583 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4584 break;
4585
4586 case DT_RELASZ:
4587 /* My reading of the SVR4 ABI indicates that the
4588 procedure linkage table relocs (DT_JMPREL) should be
4589 included in the overall relocs (DT_RELA). This is
4590 what Solaris does. However, UnixWare can not handle
4591 that case. Therefore, we override the DT_RELASZ entry
4592 here to make it not include the JMPREL relocs. Since
4593 the linker script arranges for .rela.plt to follow all
4594 other relocation sections, we don't have to worry
4595 about changing the DT_RELA entry. */
4596 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
4597 if (s != NULL)
4598 dyn.d_un.d_val -= s->size;
4599 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4600 break;
4601 }
4602 }
4603
4604 /* Fill in the first entry in the procedure linkage table. */
4605 splt = bfd_get_section_by_name (dynobj, ".plt");
4606 if (splt && splt->size > 0)
4607 {
4608 if (info->shared)
4609 {
4610 memcpy (splt->contents, elf_mn10300_pic_plt_entry,
4611 elf_mn10300_sizeof_plt (info));
4612 }
4613 else
4614 {
4615 memcpy (splt->contents, elf_mn10300_plt0_entry, PLT0_ENTRY_SIZE);
4616 bfd_put_32 (output_bfd,
4617 sgot->output_section->vma + sgot->output_offset + 4,
4618 splt->contents + elf_mn10300_plt0_gotid_offset (info));
4619 bfd_put_32 (output_bfd,
4620 sgot->output_section->vma + sgot->output_offset + 8,
4621 splt->contents + elf_mn10300_plt0_linker_offset (info));
4622 }
4623
4624 /* UnixWare sets the entsize of .plt to 4, although that doesn't
4625 really seem like the right value. */
4626 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
4627 }
4628 }
4629
4630 /* Fill in the first three entries in the global offset table. */
4631 if (sgot->size > 0)
4632 {
4633 if (sdyn == NULL)
4634 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
4635 else
4636 bfd_put_32 (output_bfd,
4637 sdyn->output_section->vma + sdyn->output_offset,
4638 sgot->contents);
4639 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
4640 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
4641 }
4642
4643 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
4644
4645 return TRUE;
4646 }
4647
4648 /* Classify relocation types, such that combreloc can sort them
4649 properly. */
4650
4651 static enum elf_reloc_type_class
4652 _bfd_mn10300_elf_reloc_type_class (const Elf_Internal_Rela *rela)
4653 {
4654 switch ((int) ELF32_R_TYPE (rela->r_info))
4655 {
4656 case R_MN10300_RELATIVE:
4657 return reloc_class_relative;
4658 case R_MN10300_JMP_SLOT:
4659 return reloc_class_plt;
4660 case R_MN10300_COPY:
4661 return reloc_class_copy;
4662 default:
4663 return reloc_class_normal;
4664 }
4665 }
4666
4667 #ifndef ELF_ARCH
4668 #define TARGET_LITTLE_SYM bfd_elf32_mn10300_vec
4669 #define TARGET_LITTLE_NAME "elf32-mn10300"
4670 #define ELF_ARCH bfd_arch_mn10300
4671 #define ELF_MACHINE_CODE EM_MN10300
4672 #define ELF_MACHINE_ALT1 EM_CYGNUS_MN10300
4673 #define ELF_MAXPAGESIZE 0x1000
4674 #endif
4675
4676 #define elf_info_to_howto mn10300_info_to_howto
4677 #define elf_info_to_howto_rel 0
4678 #define elf_backend_can_gc_sections 1
4679 #define elf_backend_rela_normal 1
4680 #define elf_backend_check_relocs mn10300_elf_check_relocs
4681 #define elf_backend_gc_mark_hook mn10300_elf_gc_mark_hook
4682 #define elf_backend_relocate_section mn10300_elf_relocate_section
4683 #define bfd_elf32_bfd_relax_section mn10300_elf_relax_section
4684 #define bfd_elf32_bfd_get_relocated_section_contents \
4685 mn10300_elf_get_relocated_section_contents
4686 #define bfd_elf32_bfd_link_hash_table_create \
4687 elf32_mn10300_link_hash_table_create
4688 #define bfd_elf32_bfd_link_hash_table_free \
4689 elf32_mn10300_link_hash_table_free
4690
4691 #ifndef elf_symbol_leading_char
4692 #define elf_symbol_leading_char '_'
4693 #endif
4694
4695 /* So we can set bits in e_flags. */
4696 #define elf_backend_final_write_processing \
4697 _bfd_mn10300_elf_final_write_processing
4698 #define elf_backend_object_p _bfd_mn10300_elf_object_p
4699
4700 #define bfd_elf32_bfd_merge_private_bfd_data \
4701 _bfd_mn10300_elf_merge_private_bfd_data
4702
4703 #define elf_backend_can_gc_sections 1
4704 #define elf_backend_create_dynamic_sections \
4705 _bfd_mn10300_elf_create_dynamic_sections
4706 #define elf_backend_adjust_dynamic_symbol \
4707 _bfd_mn10300_elf_adjust_dynamic_symbol
4708 #define elf_backend_size_dynamic_sections \
4709 _bfd_mn10300_elf_size_dynamic_sections
4710 #define elf_backend_finish_dynamic_symbol \
4711 _bfd_mn10300_elf_finish_dynamic_symbol
4712 #define elf_backend_finish_dynamic_sections \
4713 _bfd_mn10300_elf_finish_dynamic_sections
4714
4715 #define elf_backend_reloc_type_class \
4716 _bfd_mn10300_elf_reloc_type_class
4717
4718 #define elf_backend_want_got_plt 1
4719 #define elf_backend_plt_readonly 1
4720 #define elf_backend_want_plt_sym 0
4721 #define elf_backend_got_header_size 12
4722
4723 #include "elf32-target.h"
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