1 /* Matsushita 10300 specific support for 32-bit ELF
2 Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
3 Free Software Foundation, Inc.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
20
21 #include "bfd.h"
22 #include "sysdep.h"
23 #include "libbfd.h"
24 #include "elf-bfd.h"
25 #include "elf/mn10300.h"
26
27 static bfd_reloc_status_type mn10300_elf_final_link_relocate
28 PARAMS ((reloc_howto_type *, bfd *, bfd *, asection *, bfd_byte *,
29 bfd_vma, bfd_vma, bfd_vma,
30 struct elf_link_hash_entry *, unsigned long, struct bfd_link_info *,
31 asection *, int));
32 static bfd_boolean mn10300_elf_relocate_section
33 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
34 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
35 static bfd_boolean mn10300_elf_relax_section
36 PARAMS ((bfd *, asection *, struct bfd_link_info *, bfd_boolean *));
37 static bfd_byte * mn10300_elf_get_relocated_section_contents
38 PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_order *,
39 bfd_byte *, bfd_boolean, asymbol **));
40 static unsigned long elf_mn10300_mach
41 PARAMS ((flagword));
42 void _bfd_mn10300_elf_final_write_processing
43 PARAMS ((bfd *, bfd_boolean));
44 bfd_boolean _bfd_mn10300_elf_object_p
45 PARAMS ((bfd *));
46 bfd_boolean _bfd_mn10300_elf_merge_private_bfd_data
47 PARAMS ((bfd *,bfd *));
48
49 /* The mn10300 linker needs to keep track of the number of relocs that
50 it decides to copy in check_relocs for each symbol. This is so
51 that it can discard PC relative relocs if it doesn't need them when
52 linking with -Bsymbolic. We store the information in a field
53 extending the regular ELF linker hash table. */
54
55 /* This structure keeps track of the number of PC relative relocs we
56 have copied for a given symbol. */
57
58 struct elf_mn10300_pcrel_relocs_copied
59 {
60 /* Next section. */
61 struct elf_mn10300_pcrel_relocs_copied * next;
62 /* A section in dynobj. */
63 asection * section;
64 /* Number of relocs copied in this section. */
65 bfd_size_type count;
66 };
67
68 struct elf32_mn10300_link_hash_entry {
69 /* The basic elf link hash table entry. */
70 struct elf_link_hash_entry root;
71
72 /* For function symbols, the number of times this function is
73 called directly (ie by name). */
74 unsigned int direct_calls;
75
76 /* For function symbols, the size of this function's stack
77 (if <= 255 bytes). We stuff this into "call" instructions
78 to this target when it's valid and profitable to do so.
79
80 This does not include stack allocated by movm! */
81 unsigned char stack_size;
82
83 /* For function symbols, arguments (if any) for movm instruction
84 in the prologue. We stuff this value into "call" instructions
85 to the target when it's valid and profitable to do so. */
86 unsigned char movm_args;
87
88 /* For function symbols, the amount of stack space that would be allocated
89 by the movm instruction. This is redundant with movm_args, but we
90 add it to the hash table to avoid computing it over and over. */
91 unsigned char movm_stack_size;
92
93 /* Number of PC relative relocs copied for this symbol. */
94 struct elf_mn10300_pcrel_relocs_copied * pcrel_relocs_copied;
95
96 /* When set, convert all "call" instructions to this target into "calls"
97 instructions. */
98 #define MN10300_CONVERT_CALL_TO_CALLS 0x1
99
100 /* Used to mark functions which have had redundant parts of their
101 prologue deleted. */
102 #define MN10300_DELETED_PROLOGUE_BYTES 0x2
103 unsigned char flags;
104 };
105
106 /* We derive a hash table from the main elf linker hash table so
107 we can store state variables and a secondary hash table without
108 resorting to global variables. */
109 struct elf32_mn10300_link_hash_table {
110 /* The main hash table. */
111 struct elf_link_hash_table root;
112
113 /* A hash table for static functions. We could derive a new hash table
114 instead of using the full elf32_mn10300_link_hash_table if we wanted
115 to save some memory. */
116 struct elf32_mn10300_link_hash_table *static_hash_table;
117
118 /* Random linker state flags. */
119 #define MN10300_HASH_ENTRIES_INITIALIZED 0x1
120 char flags;
121 };
122
123 /* For MN10300 linker hash table. */
124
125 /* Get the MN10300 ELF linker hash table from a link_info structure. */
126
127 #define elf32_mn10300_hash_table(p) \
128 ((struct elf32_mn10300_link_hash_table *) ((p)->hash))
129
130 #define elf32_mn10300_link_hash_traverse(table, func, info) \
131 (elf_link_hash_traverse \
132 (&(table)->root, \
133 (bfd_boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
134 (info)))
135
136 static struct bfd_hash_entry *elf32_mn10300_link_hash_newfunc
137 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
138 static struct bfd_link_hash_table *elf32_mn10300_link_hash_table_create
139 PARAMS ((bfd *));
140 static void elf32_mn10300_link_hash_table_free
141 PARAMS ((struct bfd_link_hash_table *));
142
143 static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
144 PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
145 static void mn10300_info_to_howto
146 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
147 static bfd_boolean mn10300_elf_check_relocs
148 PARAMS ((bfd *, struct bfd_link_info *, asection *,
149 const Elf_Internal_Rela *));
150 static asection *mn10300_elf_gc_mark_hook
151 PARAMS ((asection *, struct bfd_link_info *info, Elf_Internal_Rela *,
152 struct elf_link_hash_entry *, Elf_Internal_Sym *));
153 static bfd_boolean mn10300_elf_relax_delete_bytes
154 PARAMS ((bfd *, asection *, bfd_vma, int));
155 static bfd_boolean mn10300_elf_symbol_address_p
156 PARAMS ((bfd *, asection *, Elf_Internal_Sym *, bfd_vma));
157 static bfd_boolean elf32_mn10300_finish_hash_table_entry
158 PARAMS ((struct bfd_hash_entry *, PTR));
159 static void compute_function_info
160 PARAMS ((bfd *, struct elf32_mn10300_link_hash_entry *,
161 bfd_vma, unsigned char *));
162
163 static bfd_boolean _bfd_mn10300_elf_create_got_section
164 PARAMS ((bfd *, struct bfd_link_info *));
165 static bfd_boolean _bfd_mn10300_elf_create_dynamic_sections
166 PARAMS ((bfd *, struct bfd_link_info *));
167 static bfd_boolean _bfd_mn10300_elf_adjust_dynamic_symbol
168 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
169 static bfd_boolean _bfd_mn10300_elf_discard_copies
170 PARAMS ((struct elf32_mn10300_link_hash_entry *,
171 struct bfd_link_info *));
172 static bfd_boolean _bfd_mn10300_elf_size_dynamic_sections
173 PARAMS ((bfd *, struct bfd_link_info *));
174 static bfd_boolean _bfd_mn10300_elf_finish_dynamic_symbol
175 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
176 Elf_Internal_Sym *));
177 static bfd_boolean _bfd_mn10300_elf_finish_dynamic_sections
178 PARAMS ((bfd *, struct bfd_link_info *));
179
180 static reloc_howto_type elf_mn10300_howto_table[] = {
181 /* Dummy relocation. Does nothing. */
182 HOWTO (R_MN10300_NONE,
183 0,
184 2,
185 16,
186 FALSE,
187 0,
188 complain_overflow_bitfield,
189 bfd_elf_generic_reloc,
190 "R_MN10300_NONE",
191 FALSE,
192 0,
193 0,
194 FALSE),
195 /* Standard 32 bit reloc. */
196 HOWTO (R_MN10300_32,
197 0,
198 2,
199 32,
200 FALSE,
201 0,
202 complain_overflow_bitfield,
203 bfd_elf_generic_reloc,
204 "R_MN10300_32",
205 FALSE,
206 0xffffffff,
207 0xffffffff,
208 FALSE),
209 /* Standard 16 bit reloc. */
210 HOWTO (R_MN10300_16,
211 0,
212 1,
213 16,
214 FALSE,
215 0,
216 complain_overflow_bitfield,
217 bfd_elf_generic_reloc,
218 "R_MN10300_16",
219 FALSE,
220 0xffff,
221 0xffff,
222 FALSE),
223 /* Standard 8 bit reloc. */
224 HOWTO (R_MN10300_8,
225 0,
226 0,
227 8,
228 FALSE,
229 0,
230 complain_overflow_bitfield,
231 bfd_elf_generic_reloc,
232 "R_MN10300_8",
233 FALSE,
234 0xff,
235 0xff,
236 FALSE),
237 /* Standard 32bit pc-relative reloc. */
238 HOWTO (R_MN10300_PCREL32,
239 0,
240 2,
241 32,
242 TRUE,
243 0,
244 complain_overflow_bitfield,
245 bfd_elf_generic_reloc,
246 "R_MN10300_PCREL32",
247 FALSE,
248 0xffffffff,
249 0xffffffff,
250 TRUE),
251 /* Standard 16bit pc-relative reloc. */
252 HOWTO (R_MN10300_PCREL16,
253 0,
254 1,
255 16,
256 TRUE,
257 0,
258 complain_overflow_bitfield,
259 bfd_elf_generic_reloc,
260 "R_MN10300_PCREL16",
261 FALSE,
262 0xffff,
263 0xffff,
264 TRUE),
265 /* Standard 8 pc-relative reloc. */
266 HOWTO (R_MN10300_PCREL8,
267 0,
268 0,
269 8,
270 TRUE,
271 0,
272 complain_overflow_bitfield,
273 bfd_elf_generic_reloc,
274 "R_MN10300_PCREL8",
275 FALSE,
276 0xff,
277 0xff,
278 TRUE),
279
280 /* GNU extension to record C++ vtable hierarchy */
281 HOWTO (R_MN10300_GNU_VTINHERIT, /* type */
282 0, /* rightshift */
283 0, /* size (0 = byte, 1 = short, 2 = long) */
284 0, /* bitsize */
285 FALSE, /* pc_relative */
286 0, /* bitpos */
287 complain_overflow_dont, /* complain_on_overflow */
288 NULL, /* special_function */
289 "R_MN10300_GNU_VTINHERIT", /* name */
290 FALSE, /* partial_inplace */
291 0, /* src_mask */
292 0, /* dst_mask */
293 FALSE), /* pcrel_offset */
294
295 /* GNU extension to record C++ vtable member usage */
296 HOWTO (R_MN10300_GNU_VTENTRY, /* type */
297 0, /* rightshift */
298 0, /* size (0 = byte, 1 = short, 2 = long) */
299 0, /* bitsize */
300 FALSE, /* pc_relative */
301 0, /* bitpos */
302 complain_overflow_dont, /* complain_on_overflow */
303 NULL, /* special_function */
304 "R_MN10300_GNU_VTENTRY", /* name */
305 FALSE, /* partial_inplace */
306 0, /* src_mask */
307 0, /* dst_mask */
308 FALSE), /* pcrel_offset */
309
310 /* Standard 24 bit reloc. */
311 HOWTO (R_MN10300_24,
312 0,
313 2,
314 24,
315 FALSE,
316 0,
317 complain_overflow_bitfield,
318 bfd_elf_generic_reloc,
319 "R_MN10300_24",
320 FALSE,
321 0xffffff,
322 0xffffff,
323 FALSE),
324 HOWTO (R_MN10300_GOTPC32, /* type */
325 0, /* rightshift */
326 2, /* size (0 = byte, 1 = short, 2 = long) */
327 32, /* bitsize */
328 TRUE, /* pc_relative */
329 0, /* bitpos */
330 complain_overflow_bitfield, /* complain_on_overflow */
331 bfd_elf_generic_reloc, /* */
332 "R_MN10300_GOTPC32", /* name */
333 FALSE, /* partial_inplace */
334 0xffffffff, /* src_mask */
335 0xffffffff, /* dst_mask */
336 TRUE), /* pcrel_offset */
337
338 HOWTO (R_MN10300_GOTPC16, /* type */
339 0, /* rightshift */
340 1, /* size (0 = byte, 1 = short, 2 = long) */
341 16, /* bitsize */
342 TRUE, /* pc_relative */
343 0, /* bitpos */
344 complain_overflow_bitfield, /* complain_on_overflow */
345 bfd_elf_generic_reloc, /* */
346 "R_MN10300_GOTPC16", /* name */
347 FALSE, /* partial_inplace */
348 0xffff, /* src_mask */
349 0xffff, /* dst_mask */
350 TRUE), /* pcrel_offset */
351
352 HOWTO (R_MN10300_GOTOFF32, /* type */
353 0, /* rightshift */
354 2, /* size (0 = byte, 1 = short, 2 = long) */
355 32, /* bitsize */
356 FALSE, /* pc_relative */
357 0, /* bitpos */
358 complain_overflow_bitfield, /* complain_on_overflow */
359 bfd_elf_generic_reloc, /* */
360 "R_MN10300_GOTOFF32", /* name */
361 FALSE, /* partial_inplace */
362 0xffffffff, /* src_mask */
363 0xffffffff, /* dst_mask */
364 FALSE), /* pcrel_offset */
365
366 HOWTO (R_MN10300_GOTOFF24, /* type */
367 0, /* rightshift */
368 2, /* size (0 = byte, 1 = short, 2 = long) */
369 24, /* bitsize */
370 FALSE, /* pc_relative */
371 0, /* bitpos */
372 complain_overflow_bitfield, /* complain_on_overflow */
373 bfd_elf_generic_reloc, /* */
374 "R_MN10300_GOTOFF24", /* name */
375 FALSE, /* partial_inplace */
376 0xffffff, /* src_mask */
377 0xffffff, /* dst_mask */
378 FALSE), /* pcrel_offset */
379
380 HOWTO (R_MN10300_GOTOFF16, /* type */
381 0, /* rightshift */
382 1, /* size (0 = byte, 1 = short, 2 = long) */
383 16, /* bitsize */
384 FALSE, /* pc_relative */
385 0, /* bitpos */
386 complain_overflow_bitfield, /* complain_on_overflow */
387 bfd_elf_generic_reloc, /* */
388 "R_MN10300_GOTOFF16", /* name */
389 FALSE, /* partial_inplace */
390 0xffff, /* src_mask */
391 0xffff, /* dst_mask */
392 FALSE), /* pcrel_offset */
393
394 HOWTO (R_MN10300_PLT32, /* type */
395 0, /* rightshift */
396 2, /* size (0 = byte, 1 = short, 2 = long) */
397 32, /* bitsize */
398 TRUE, /* pc_relative */
399 0, /* bitpos */
400 complain_overflow_bitfield, /* complain_on_overflow */
401 bfd_elf_generic_reloc, /* */
402 "R_MN10300_PLT32", /* name */
403 FALSE, /* partial_inplace */
404 0xffffffff, /* src_mask */
405 0xffffffff, /* dst_mask */
406 TRUE), /* pcrel_offset */
407
408 HOWTO (R_MN10300_PLT16, /* type */
409 0, /* rightshift */
410 1, /* size (0 = byte, 1 = short, 2 = long) */
411 16, /* bitsize */
412 TRUE, /* pc_relative */
413 0, /* bitpos */
414 complain_overflow_bitfield, /* complain_on_overflow */
415 bfd_elf_generic_reloc, /* */
416 "R_MN10300_PLT16", /* name */
417 FALSE, /* partial_inplace */
418 0xffff, /* src_mask */
419 0xffff, /* dst_mask */
420 TRUE), /* pcrel_offset */
421
422 HOWTO (R_MN10300_GOT32, /* type */
423 0, /* rightshift */
424 2, /* size (0 = byte, 1 = short, 2 = long) */
425 32, /* bitsize */
426 FALSE, /* pc_relative */
427 0, /* bitpos */
428 complain_overflow_bitfield, /* complain_on_overflow */
429 bfd_elf_generic_reloc, /* */
430 "R_MN10300_GOT32", /* name */
431 FALSE, /* partial_inplace */
432 0xffffffff, /* src_mask */
433 0xffffffff, /* dst_mask */
434 FALSE), /* pcrel_offset */
435
436 HOWTO (R_MN10300_GOT24, /* type */
437 0, /* rightshift */
438 2, /* size (0 = byte, 1 = short, 2 = long) */
439 24, /* bitsize */
440 FALSE, /* pc_relative */
441 0, /* bitpos */
442 complain_overflow_bitfield, /* complain_on_overflow */
443 bfd_elf_generic_reloc, /* */
444 "R_MN10300_GOT24", /* name */
445 FALSE, /* partial_inplace */
446 0xffffffff, /* src_mask */
447 0xffffffff, /* dst_mask */
448 FALSE), /* pcrel_offset */
449
450 HOWTO (R_MN10300_GOT16, /* type */
451 0, /* rightshift */
452 1, /* size (0 = byte, 1 = short, 2 = long) */
453 16, /* bitsize */
454 FALSE, /* pc_relative */
455 0, /* bitpos */
456 complain_overflow_bitfield, /* complain_on_overflow */
457 bfd_elf_generic_reloc, /* */
458 "R_MN10300_GOT16", /* name */
459 FALSE, /* partial_inplace */
460 0xffffffff, /* src_mask */
461 0xffffffff, /* dst_mask */
462 FALSE), /* pcrel_offset */
463
464 HOWTO (R_MN10300_COPY, /* type */
465 0, /* rightshift */
466 2, /* size (0 = byte, 1 = short, 2 = long) */
467 32, /* bitsize */
468 FALSE, /* pc_relative */
469 0, /* bitpos */
470 complain_overflow_bitfield, /* complain_on_overflow */
471 bfd_elf_generic_reloc, /* */
472 "R_MN10300_COPY", /* name */
473 FALSE, /* partial_inplace */
474 0xffffffff, /* src_mask */
475 0xffffffff, /* dst_mask */
476 FALSE), /* pcrel_offset */
477
478 HOWTO (R_MN10300_GLOB_DAT, /* type */
479 0, /* rightshift */
480 2, /* size (0 = byte, 1 = short, 2 = long) */
481 32, /* bitsize */
482 FALSE, /* pc_relative */
483 0, /* bitpos */
484 complain_overflow_bitfield, /* complain_on_overflow */
485 bfd_elf_generic_reloc, /* */
486 "R_MN10300_GLOB_DAT", /* name */
487 FALSE, /* partial_inplace */
488 0xffffffff, /* src_mask */
489 0xffffffff, /* dst_mask */
490 FALSE), /* pcrel_offset */
491
492 HOWTO (R_MN10300_JMP_SLOT, /* type */
493 0, /* rightshift */
494 2, /* size (0 = byte, 1 = short, 2 = long) */
495 32, /* bitsize */
496 FALSE, /* pc_relative */
497 0, /* bitpos */
498 complain_overflow_bitfield, /* complain_on_overflow */
499 bfd_elf_generic_reloc, /* */
500 "R_MN10300_JMP_SLOT", /* name */
501 FALSE, /* partial_inplace */
502 0xffffffff, /* src_mask */
503 0xffffffff, /* dst_mask */
504 FALSE), /* pcrel_offset */
505
506 HOWTO (R_MN10300_RELATIVE, /* type */
507 0, /* rightshift */
508 2, /* size (0 = byte, 1 = short, 2 = long) */
509 32, /* bitsize */
510 FALSE, /* pc_relative */
511 0, /* bitpos */
512 complain_overflow_bitfield, /* complain_on_overflow */
513 bfd_elf_generic_reloc, /* */
514 "R_MN10300_RELATIVE", /* name */
515 FALSE, /* partial_inplace */
516 0xffffffff, /* src_mask */
517 0xffffffff, /* dst_mask */
518 FALSE), /* pcrel_offset */
519
520 };
521
522 struct mn10300_reloc_map {
523 bfd_reloc_code_real_type bfd_reloc_val;
524 unsigned char elf_reloc_val;
525 };
526
527 static const struct mn10300_reloc_map mn10300_reloc_map[] = {
528 { BFD_RELOC_NONE, R_MN10300_NONE, },
529 { BFD_RELOC_32, R_MN10300_32, },
530 { BFD_RELOC_16, R_MN10300_16, },
531 { BFD_RELOC_8, R_MN10300_8, },
532 { BFD_RELOC_32_PCREL, R_MN10300_PCREL32, },
533 { BFD_RELOC_16_PCREL, R_MN10300_PCREL16, },
534 { BFD_RELOC_8_PCREL, R_MN10300_PCREL8, },
535 { BFD_RELOC_24, R_MN10300_24, },
536 { BFD_RELOC_VTABLE_INHERIT, R_MN10300_GNU_VTINHERIT },
537 { BFD_RELOC_VTABLE_ENTRY, R_MN10300_GNU_VTENTRY },
538 { BFD_RELOC_32_GOT_PCREL, R_MN10300_GOTPC32 },
539 { BFD_RELOC_16_GOT_PCREL, R_MN10300_GOTPC16 },
540 { BFD_RELOC_32_GOTOFF, R_MN10300_GOTOFF32 },
541 { BFD_RELOC_MN10300_GOTOFF24, R_MN10300_GOTOFF24 },
542 { BFD_RELOC_16_GOTOFF, R_MN10300_GOTOFF16 },
543 { BFD_RELOC_32_PLT_PCREL, R_MN10300_PLT32 },
544 { BFD_RELOC_16_PLT_PCREL, R_MN10300_PLT16 },
545 { BFD_RELOC_MN10300_GOT32, R_MN10300_GOT32 },
546 { BFD_RELOC_MN10300_GOT24, R_MN10300_GOT24 },
547 { BFD_RELOC_MN10300_GOT16, R_MN10300_GOT16 },
548 { BFD_RELOC_MN10300_COPY, R_MN10300_COPY },
549 { BFD_RELOC_MN10300_GLOB_DAT, R_MN10300_GLOB_DAT },
550 { BFD_RELOC_MN10300_JMP_SLOT, R_MN10300_JMP_SLOT },
551 { BFD_RELOC_MN10300_RELATIVE, R_MN10300_RELATIVE },
552 };
553
554 /* Create the GOT section. */
555
556 static bfd_boolean
_bfd_mn10300_elf_create_got_section(abfd,info)557 _bfd_mn10300_elf_create_got_section (abfd, info)
558 bfd * abfd;
559 struct bfd_link_info * info;
560 {
561 flagword flags;
562 flagword pltflags;
563 asection * s;
564 struct bfd_link_hash_entry * bh;
565 struct elf_link_hash_entry * h;
566 const struct elf_backend_data * bed = get_elf_backend_data (abfd);
567 int ptralign;
568
569 /* This function may be called more than once. */
570 if (bfd_get_section_by_name (abfd, ".got") != NULL)
571 return TRUE;
572
573 switch (bed->s->arch_size)
574 {
575 case 32:
576 ptralign = 2;
577 break;
578
579 case 64:
580 ptralign = 3;
581 break;
582
583 default:
584 bfd_set_error (bfd_error_bad_value);
585 return FALSE;
586 }
587
588 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
589 | SEC_LINKER_CREATED);
590
591 pltflags = flags;
592 pltflags |= SEC_CODE;
593 if (bed->plt_not_loaded)
594 pltflags &= ~ (SEC_LOAD | SEC_HAS_CONTENTS);
595 if (bed->plt_readonly)
596 pltflags |= SEC_READONLY;
597
598 s = bfd_make_section (abfd, ".plt");
599 if (s == NULL
600 || ! bfd_set_section_flags (abfd, s, pltflags)
601 || ! bfd_set_section_alignment (abfd, s, bed->plt_alignment))
602 return FALSE;
603
604 if (bed->want_plt_sym)
605 {
606 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
607 .plt section. */
608 bh = NULL;
609 if (! (_bfd_generic_link_add_one_symbol
610 (info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s,
611 (bfd_vma) 0, (const char *) NULL, FALSE,
612 get_elf_backend_data (abfd)->collect, &bh)))
613 return FALSE;
614 h = (struct elf_link_hash_entry *) bh;
615 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
616 h->type = STT_OBJECT;
617
618 if (info->shared
619 && ! bfd_elf_link_record_dynamic_symbol (info, h))
620 return FALSE;
621 }
622
623 s = bfd_make_section (abfd, ".got");
624 if (s == NULL
625 || ! bfd_set_section_flags (abfd, s, flags)
626 || ! bfd_set_section_alignment (abfd, s, ptralign))
627 return FALSE;
628
629 if (bed->want_got_plt)
630 {
631 s = bfd_make_section (abfd, ".got.plt");
632 if (s == NULL
633 || ! bfd_set_section_flags (abfd, s, flags)
634 || ! bfd_set_section_alignment (abfd, s, ptralign))
635 return FALSE;
636 }
637
638 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
639 (or .got.plt) section. We don't do this in the linker script
640 because we don't want to define the symbol if we are not creating
641 a global offset table. */
642 bh = NULL;
643 if (!(_bfd_generic_link_add_one_symbol
644 (info, abfd, "_GLOBAL_OFFSET_TABLE_", BSF_GLOBAL, s,
645 bed->got_symbol_offset, (const char *) NULL, FALSE,
646 bed->collect, &bh)))
647 return FALSE;
648 h = (struct elf_link_hash_entry *) bh;
649 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
650 h->type = STT_OBJECT;
651
652 if (info->shared
653 && ! bfd_elf_link_record_dynamic_symbol (info, h))
654 return FALSE;
655
656 elf_hash_table (info)->hgot = h;
657
658 /* The first bit of the global offset table is the header. */
659 s->_raw_size += bed->got_header_size + bed->got_symbol_offset;
660
661 return TRUE;
662 }
663
664 static reloc_howto_type *
bfd_elf32_bfd_reloc_type_lookup(abfd,code)665 bfd_elf32_bfd_reloc_type_lookup (abfd, code)
666 bfd *abfd ATTRIBUTE_UNUSED;
667 bfd_reloc_code_real_type code;
668 {
669 unsigned int i;
670
671 for (i = 0;
672 i < sizeof (mn10300_reloc_map) / sizeof (struct mn10300_reloc_map);
673 i++)
674 {
675 if (mn10300_reloc_map[i].bfd_reloc_val == code)
676 return &elf_mn10300_howto_table[mn10300_reloc_map[i].elf_reloc_val];
677 }
678
679 return NULL;
680 }
681
682 /* Set the howto pointer for an MN10300 ELF reloc. */
683
684 static void
mn10300_info_to_howto(abfd,cache_ptr,dst)685 mn10300_info_to_howto (abfd, cache_ptr, dst)
686 bfd *abfd ATTRIBUTE_UNUSED;
687 arelent *cache_ptr;
688 Elf_Internal_Rela *dst;
689 {
690 unsigned int r_type;
691
692 r_type = ELF32_R_TYPE (dst->r_info);
693 BFD_ASSERT (r_type < (unsigned int) R_MN10300_MAX);
694 cache_ptr->howto = &elf_mn10300_howto_table[r_type];
695 }
696
697 /* Look through the relocs for a section during the first phase.
698 Since we don't do .gots or .plts, we just need to consider the
699 virtual table relocs for gc. */
700
701 static bfd_boolean
mn10300_elf_check_relocs(abfd,info,sec,relocs)702 mn10300_elf_check_relocs (abfd, info, sec, relocs)
703 bfd *abfd;
704 struct bfd_link_info *info;
705 asection *sec;
706 const Elf_Internal_Rela *relocs;
707 {
708 Elf_Internal_Shdr *symtab_hdr;
709 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
710 const Elf_Internal_Rela *rel;
711 const Elf_Internal_Rela *rel_end;
712 bfd * dynobj;
713 bfd_vma * local_got_offsets;
714 asection * sgot;
715 asection * srelgot;
716 asection * sreloc;
717
718 sgot = NULL;
719 srelgot = NULL;
720 sreloc = NULL;
721
722 if (info->relocatable)
723 return TRUE;
724
725 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
726 sym_hashes = elf_sym_hashes (abfd);
727 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym);
728 if (!elf_bad_symtab (abfd))
729 sym_hashes_end -= symtab_hdr->sh_info;
730
731 dynobj = elf_hash_table (info)->dynobj;
732 local_got_offsets = elf_local_got_offsets (abfd);
733 rel_end = relocs + sec->reloc_count;
734 for (rel = relocs; rel < rel_end; rel++)
735 {
736 struct elf_link_hash_entry *h;
737 unsigned long r_symndx;
738
739 r_symndx = ELF32_R_SYM (rel->r_info);
740 if (r_symndx < symtab_hdr->sh_info)
741 h = NULL;
742 else
743 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
744
745 /* Some relocs require a global offset table. */
746 if (dynobj == NULL)
747 {
748 switch (ELF32_R_TYPE (rel->r_info))
749 {
750 case R_MN10300_GOT32:
751 case R_MN10300_GOT24:
752 case R_MN10300_GOT16:
753 case R_MN10300_GOTOFF32:
754 case R_MN10300_GOTOFF24:
755 case R_MN10300_GOTOFF16:
756 case R_MN10300_GOTPC32:
757 case R_MN10300_GOTPC16:
758 elf_hash_table (info)->dynobj = dynobj = abfd;
759 if (! _bfd_mn10300_elf_create_got_section (dynobj, info))
760 return FALSE;
761 break;
762
763 default:
764 break;
765 }
766 }
767
768 switch (ELF32_R_TYPE (rel->r_info))
769 {
770 /* This relocation describes the C++ object vtable hierarchy.
771 Reconstruct it for later use during GC. */
772 case R_MN10300_GNU_VTINHERIT:
773 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
774 return FALSE;
775 break;
776
777 /* This relocation describes which C++ vtable entries are actually
778 used. Record for later use during GC. */
779 case R_MN10300_GNU_VTENTRY:
780 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
781 return FALSE;
782 break;
783 case R_MN10300_GOT32:
784 case R_MN10300_GOT24:
785 case R_MN10300_GOT16:
786 /* This symbol requires a global offset table entry. */
787
788 if (sgot == NULL)
789 {
790 sgot = bfd_get_section_by_name (dynobj, ".got");
791 BFD_ASSERT (sgot != NULL);
792 }
793
794 if (srelgot == NULL
795 && (h != NULL || info->shared))
796 {
797 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
798 if (srelgot == NULL)
799 {
800 srelgot = bfd_make_section (dynobj, ".rela.got");
801 if (srelgot == NULL
802 || ! bfd_set_section_flags (dynobj, srelgot,
803 (SEC_ALLOC
804 | SEC_LOAD
805 | SEC_HAS_CONTENTS
806 | SEC_IN_MEMORY
807 | SEC_LINKER_CREATED
808 | SEC_READONLY))
809 || ! bfd_set_section_alignment (dynobj, srelgot, 2))
810 return FALSE;
811 }
812 }
813
814 if (h != NULL)
815 {
816 if (h->got.offset != (bfd_vma) -1)
817 /* We have already allocated space in the .got. */
818 break;
819
820 h->got.offset = sgot->_raw_size;
821
822 /* Make sure this symbol is output as a dynamic symbol. */
823 if (h->dynindx == -1)
824 {
825 if (! bfd_elf_link_record_dynamic_symbol (info, h))
826 return FALSE;
827 }
828
829 srelgot->_raw_size += sizeof (Elf32_External_Rela);
830 }
831 else
832 {
833 /* This is a global offset table entry for a local
834 symbol. */
835 if (local_got_offsets == NULL)
836 {
837 size_t size;
838 unsigned int i;
839
840 size = symtab_hdr->sh_info * sizeof (bfd_vma);
841 local_got_offsets = (bfd_vma *) bfd_alloc (abfd, size);
842
843 if (local_got_offsets == NULL)
844 return FALSE;
845 elf_local_got_offsets (abfd) = local_got_offsets;
846
847 for (i = 0; i < symtab_hdr->sh_info; i++)
848 local_got_offsets[i] = (bfd_vma) -1;
849 }
850
851 if (local_got_offsets[r_symndx] != (bfd_vma) -1)
852 /* We have already allocated space in the .got. */
853 break;
854
855 local_got_offsets[r_symndx] = sgot->_raw_size;
856
857 if (info->shared)
858 /* If we are generating a shared object, we need to
859 output a R_MN10300_RELATIVE reloc so that the dynamic
860 linker can adjust this GOT entry. */
861 srelgot->_raw_size += sizeof (Elf32_External_Rela);
862 }
863
864 sgot->_raw_size += 4;
865
866 break;
867
868 case R_MN10300_PLT32:
869 case R_MN10300_PLT16:
870 /* This symbol requires a procedure linkage table entry. We
871 actually build the entry in adjust_dynamic_symbol,
872 because this might be a case of linking PIC code which is
873 never referenced by a dynamic object, in which case we
874 don't need to generate a procedure linkage table entry
875 after all. */
876
877 /* If this is a local symbol, we resolve it directly without
878 creating a procedure linkage table entry. */
879 if (h == NULL)
880 continue;
881
882 if (ELF_ST_VISIBILITY (h->other) == STV_INTERNAL
883 || ELF_ST_VISIBILITY (h->other) == STV_HIDDEN)
884 break;
885
886 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
887
888 break;
889
890 case R_MN10300_32:
891 case R_MN10300_24:
892 case R_MN10300_16:
893 case R_MN10300_8:
894 case R_MN10300_PCREL32:
895 case R_MN10300_PCREL16:
896 case R_MN10300_PCREL8:
897 if (h != NULL)
898 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
899
900 /* If we are creating a shared library, and this is a reloc
901 against a global symbol, or a non PC relative reloc
902 against a local symbol, then we need to copy the reloc
903 into the shared library. However, if we are linking with
904 -Bsymbolic, we do not need to copy a reloc against a
905 global symbol which is defined in an object we are
906 including in the link (i.e., DEF_REGULAR is set). At
907 this point we have not seen all the input files, so it is
908 possible that DEF_REGULAR is not set now but will be set
909 later (it is never cleared). We account for that
910 possibility below by storing information in the
911 pcrel_relocs_copied field of the hash table entry. */
912 if (info->shared
913 && (sec->flags & SEC_ALLOC) != 0
914 && (! (elf_mn10300_howto_table[ELF32_R_TYPE (rel->r_info)]
915 .pc_relative)
916 || (h != NULL
917 && (! info->symbolic
918 || h->root.type == bfd_link_hash_defweak
919 || (h->elf_link_hash_flags
920 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
921 {
922 /* When creating a shared object, we must copy these
923 reloc types into the output file. We create a reloc
924 section in dynobj and make room for this reloc. */
925 if (sreloc == NULL)
926 {
927 const char * name;
928
929 name = (bfd_elf_string_from_elf_section
930 (abfd,
931 elf_elfheader (abfd)->e_shstrndx,
932 elf_section_data (sec)->rel_hdr.sh_name));
933 if (name == NULL)
934 return FALSE;
935
936 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
937 && strcmp (bfd_get_section_name (abfd, sec),
938 name + 5) == 0);
939
940 sreloc = bfd_get_section_by_name (dynobj, name);
941 if (sreloc == NULL)
942 {
943 flagword flags;
944
945 sreloc = bfd_make_section (dynobj, name);
946 flags = (SEC_HAS_CONTENTS | SEC_READONLY
947 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
948 if ((sec->flags & SEC_ALLOC) != 0)
949 flags |= SEC_ALLOC | SEC_LOAD;
950 if (sreloc == NULL
951 || ! bfd_set_section_flags (dynobj, sreloc, flags)
952 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
953 return FALSE;
954 }
955 }
956
957 sreloc->_raw_size += sizeof (Elf32_External_Rela);
958
959 /* If we are linking with -Bsymbolic, and this is a
960 global symbol, we count the number of PC relative
961 relocations we have entered for this symbol, so that
962 we can discard them again if the symbol is later
963 defined by a regular object. Note that this function
964 is only called if we are using an elf_sh linker
965 hash table, which means that h is really a pointer to
966 an elf32_mn10300_link_hash_entry. */
967 if (h != NULL
968 && (elf_mn10300_howto_table[ELF32_R_TYPE (rel->r_info)]
969 .pc_relative))
970 {
971 struct elf32_mn10300_link_hash_entry *eh;
972 struct elf_mn10300_pcrel_relocs_copied *p;
973
974 eh = (struct elf32_mn10300_link_hash_entry *) h;
975
976 for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
977 if (p->section == sreloc)
978 break;
979
980 if (p == NULL)
981 {
982 p = ((struct elf_mn10300_pcrel_relocs_copied *)
983 bfd_alloc (dynobj, sizeof *p));
984 if (p == NULL)
985 return FALSE;
986
987 p->next = eh->pcrel_relocs_copied;
988 eh->pcrel_relocs_copied = p;
989 p->section = sreloc;
990 p->count = 0;
991 }
992
993 ++p->count;
994 }
995 }
996
997 break;
998 }
999 }
1000
1001 return TRUE;
1002 }
1003
1004 /* Return the section that should be marked against GC for a given
1005 relocation. */
1006
1007 static asection *
mn10300_elf_gc_mark_hook(sec,info,rel,h,sym)1008 mn10300_elf_gc_mark_hook (sec, info, rel, h, sym)
1009 asection *sec;
1010 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1011 Elf_Internal_Rela *rel;
1012 struct elf_link_hash_entry *h;
1013 Elf_Internal_Sym *sym;
1014 {
1015 if (h != NULL)
1016 {
1017 switch (ELF32_R_TYPE (rel->r_info))
1018 {
1019 case R_MN10300_GNU_VTINHERIT:
1020 case R_MN10300_GNU_VTENTRY:
1021 break;
1022
1023 default:
1024 switch (h->root.type)
1025 {
1026 case bfd_link_hash_defined:
1027 case bfd_link_hash_defweak:
1028 return h->root.u.def.section;
1029
1030 case bfd_link_hash_common:
1031 return h->root.u.c.p->section;
1032
1033 default:
1034 break;
1035 }
1036 }
1037 }
1038 else
1039 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
1040
1041 return NULL;
1042 }
1043
1044 /* Perform a relocation as part of a final link. */
1045 static bfd_reloc_status_type
mn10300_elf_final_link_relocate(howto,input_bfd,output_bfd,input_section,contents,offset,value,addend,h,symndx,info,sym_sec,is_local)1046 mn10300_elf_final_link_relocate (howto, input_bfd, output_bfd,
1047 input_section, contents, offset, value,
1048 addend, h, symndx, info, sym_sec, is_local)
1049 reloc_howto_type *howto;
1050 bfd *input_bfd;
1051 bfd *output_bfd ATTRIBUTE_UNUSED;
1052 asection *input_section;
1053 bfd_byte *contents;
1054 bfd_vma offset;
1055 bfd_vma value;
1056 bfd_vma addend;
1057 struct elf_link_hash_entry * h;
1058 unsigned long symndx;
1059 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1060 asection *sym_sec ATTRIBUTE_UNUSED;
1061 int is_local ATTRIBUTE_UNUSED;
1062 {
1063 unsigned long r_type = howto->type;
1064 bfd_byte *hit_data = contents + offset;
1065 bfd * dynobj;
1066 bfd_vma * local_got_offsets;
1067 asection * sgot;
1068 asection * splt;
1069 asection * sreloc;
1070
1071 dynobj = elf_hash_table (info)->dynobj;
1072 local_got_offsets = elf_local_got_offsets (input_bfd);
1073
1074 sgot = NULL;
1075 splt = NULL;
1076 sreloc = NULL;
1077
1078 switch (r_type)
1079 {
1080 case R_MN10300_NONE:
1081 return bfd_reloc_ok;
1082
1083 case R_MN10300_32:
1084 if (info->shared
1085 && (input_section->flags & SEC_ALLOC) != 0)
1086 {
1087 Elf_Internal_Rela outrel;
1088 bfd_boolean skip, relocate;
1089
1090 /* When generating a shared object, these relocations are
1091 copied into the output file to be resolved at run
1092 time. */
1093 if (sreloc == NULL)
1094 {
1095 const char * name;
1096
1097 name = (bfd_elf_string_from_elf_section
1098 (input_bfd,
1099 elf_elfheader (input_bfd)->e_shstrndx,
1100 elf_section_data (input_section)->rel_hdr.sh_name));
1101 if (name == NULL)
1102 return FALSE;
1103
1104 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
1105 && strcmp (bfd_get_section_name (input_bfd,
1106 input_section),
1107 name + 5) == 0);
1108
1109 sreloc = bfd_get_section_by_name (dynobj, name);
1110 BFD_ASSERT (sreloc != NULL);
1111 }
1112
1113 skip = FALSE;
1114
1115 if (elf_section_data (input_section)->sec_info == NULL
1116 || (input_section->sec_info_type != ELF_INFO_TYPE_STABS))
1117 outrel.r_offset = offset;
1118 else
1119 {
1120 bfd_vma off;
1121
1122 off = (_bfd_stab_section_offset
1123 (output_bfd, & elf_hash_table (info)->stab_info,
1124 input_section,
1125 & elf_section_data (input_section)->sec_info,
1126 offset));
1127 if (off == (bfd_vma) -1)
1128 skip = TRUE;
1129 outrel.r_offset = off;
1130 }
1131
1132 outrel.r_offset += (input_section->output_section->vma
1133 + input_section->output_offset);
1134
1135 if (skip)
1136 {
1137 memset (&outrel, 0, sizeof outrel);
1138 relocate = FALSE;
1139 }
1140 else
1141 {
1142 /* h->dynindx may be -1 if this symbol was marked to
1143 become local. */
1144 if (h == NULL
1145 || ((info->symbolic || h->dynindx == -1)
1146 && (h->elf_link_hash_flags
1147 & ELF_LINK_HASH_DEF_REGULAR) != 0))
1148 {
1149 relocate = TRUE;
1150 outrel.r_info = ELF32_R_INFO (0, R_MN10300_RELATIVE);
1151 outrel.r_addend = value + addend;
1152 }
1153 else
1154 {
1155 BFD_ASSERT (h->dynindx != -1);
1156 relocate = FALSE;
1157 outrel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_32);
1158 outrel.r_addend = value + addend;
1159 }
1160 }
1161
1162 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
1163 (bfd_byte *) (((Elf32_External_Rela *) sreloc->contents)
1164 + sreloc->reloc_count));
1165 ++sreloc->reloc_count;
1166
1167 /* If this reloc is against an external symbol, we do
1168 not want to fiddle with the addend. Otherwise, we
1169 need to include the symbol value so that it becomes
1170 an addend for the dynamic reloc. */
1171 if (! relocate)
1172 return bfd_reloc_ok;
1173 }
1174 value += addend;
1175 bfd_put_32 (input_bfd, value, hit_data);
1176 return bfd_reloc_ok;
1177
1178 case R_MN10300_24:
1179 value += addend;
1180
1181 if ((long) value > 0x7fffff || (long) value < -0x800000)
1182 return bfd_reloc_overflow;
1183
1184 bfd_put_8 (input_bfd, value & 0xff, hit_data);
1185 bfd_put_8 (input_bfd, (value >> 8) & 0xff, hit_data + 1);
1186 bfd_put_8 (input_bfd, (value >> 16) & 0xff, hit_data + 2);
1187 return bfd_reloc_ok;
1188
1189 case R_MN10300_16:
1190 value += addend;
1191
1192 if ((long) value > 0x7fff || (long) value < -0x8000)
1193 return bfd_reloc_overflow;
1194
1195 bfd_put_16 (input_bfd, value, hit_data);
1196 return bfd_reloc_ok;
1197
1198 case R_MN10300_8:
1199 value += addend;
1200
1201 if ((long) value > 0x7f || (long) value < -0x80)
1202 return bfd_reloc_overflow;
1203
1204 bfd_put_8 (input_bfd, value, hit_data);
1205 return bfd_reloc_ok;
1206
1207 case R_MN10300_PCREL8:
1208 value -= (input_section->output_section->vma
1209 + input_section->output_offset);
1210 value -= offset;
1211 value += addend;
1212
1213 if ((long) value > 0xff || (long) value < -0x100)
1214 return bfd_reloc_overflow;
1215
1216 bfd_put_8 (input_bfd, value, hit_data);
1217 return bfd_reloc_ok;
1218
1219 case R_MN10300_PCREL16:
1220 value -= (input_section->output_section->vma
1221 + input_section->output_offset);
1222 value -= offset;
1223 value += addend;
1224
1225 if ((long) value > 0xffff || (long) value < -0x10000)
1226 return bfd_reloc_overflow;
1227
1228 bfd_put_16 (input_bfd, value, hit_data);
1229 return bfd_reloc_ok;
1230
1231 case R_MN10300_PCREL32:
1232 if (info->shared
1233 && (input_section->flags & SEC_ALLOC) != 0
1234 && h != NULL
1235 && h->dynindx != -1
1236 && (! info->symbolic
1237 || (h->elf_link_hash_flags
1238 & ELF_LINK_HASH_DEF_REGULAR) == 0))
1239 {
1240 Elf_Internal_Rela outrel;
1241 bfd_boolean skip;
1242
1243 /* When generating a shared object, these relocations
1244 are copied into the output file to be resolved at run
1245 time. */
1246
1247 if (sreloc == NULL)
1248 {
1249 const char * name;
1250
1251 name = (bfd_elf_string_from_elf_section
1252 (input_bfd,
1253 elf_elfheader (input_bfd)->e_shstrndx,
1254 elf_section_data (input_section)->rel_hdr.sh_name));
1255 if (name == NULL)
1256 return FALSE;
1257
1258 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
1259 && strcmp (bfd_get_section_name (input_bfd,
1260 input_section),
1261 name + 5) == 0);
1262
1263 sreloc = bfd_get_section_by_name (dynobj, name);
1264 BFD_ASSERT (sreloc != NULL);
1265 }
1266
1267 skip = FALSE;
1268
1269 if (elf_section_data (input_section)->sec_info == NULL
1270 || (input_section->sec_info_type != ELF_INFO_TYPE_STABS))
1271 outrel.r_offset = offset;
1272 else
1273 {
1274 bfd_vma off;
1275
1276 off = (_bfd_stab_section_offset
1277 (output_bfd, & elf_hash_table (info)->stab_info,
1278 input_section,
1279 & elf_section_data (input_section)->sec_info,
1280 offset));
1281 if (off == (bfd_vma) -1)
1282 skip = TRUE;
1283 outrel.r_offset = off;
1284 }
1285
1286 outrel.r_offset += (input_section->output_section->vma
1287 + input_section->output_offset);
1288
1289 if (skip)
1290 memset (&outrel, 0, sizeof outrel);
1291 else
1292 {
1293 BFD_ASSERT (h != NULL && h->dynindx != -1);
1294 outrel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_PCREL32);
1295 outrel.r_addend = addend;
1296 }
1297
1298 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
1299 (bfd_byte *) (((Elf32_External_Rela *)
1300 sreloc->contents)
1301 + sreloc->reloc_count));
1302 ++sreloc->reloc_count;
1303
1304 return bfd_reloc_ok;
1305 }
1306
1307 value -= (input_section->output_section->vma
1308 + input_section->output_offset);
1309 value -= offset;
1310 value += addend;
1311
1312 bfd_put_32 (input_bfd, value, hit_data);
1313 return bfd_reloc_ok;
1314
1315 case R_MN10300_GNU_VTINHERIT:
1316 case R_MN10300_GNU_VTENTRY:
1317 return bfd_reloc_ok;
1318
1319 case R_MN10300_GOTPC32:
1320 /* Use global offset table as symbol value. */
1321
1322 value = bfd_get_section_by_name (dynobj,
1323 ".got")->output_section->vma;
1324 value -= (input_section->output_section->vma
1325 + input_section->output_offset);
1326 value -= offset;
1327 value += addend;
1328
1329 bfd_put_32 (input_bfd, value, hit_data);
1330 return bfd_reloc_ok;
1331
1332 case R_MN10300_GOTPC16:
1333 /* Use global offset table as symbol value. */
1334
1335 value = bfd_get_section_by_name (dynobj,
1336 ".got")->output_section->vma;
1337 value -= (input_section->output_section->vma
1338 + input_section->output_offset);
1339 value -= offset;
1340 value += addend;
1341
1342 if ((long) value > 0xffff || (long) value < -0x10000)
1343 return bfd_reloc_overflow;
1344
1345 bfd_put_16 (input_bfd, value, hit_data);
1346 return bfd_reloc_ok;
1347
1348 case R_MN10300_GOTOFF32:
1349 value -= bfd_get_section_by_name (dynobj,
1350 ".got")->output_section->vma;
1351 value += addend;
1352
1353 bfd_put_32 (input_bfd, value, hit_data);
1354 return bfd_reloc_ok;
1355
1356 case R_MN10300_GOTOFF24:
1357 value -= bfd_get_section_by_name (dynobj,
1358 ".got")->output_section->vma;
1359 value += addend;
1360
1361 if ((long) value > 0x7fffff || (long) value < -0x800000)
1362 return bfd_reloc_overflow;
1363
1364 bfd_put_8 (input_bfd, value, hit_data);
1365 bfd_put_8 (input_bfd, (value >> 8) & 0xff, hit_data + 1);
1366 bfd_put_8 (input_bfd, (value >> 16) & 0xff, hit_data + 2);
1367 return bfd_reloc_ok;
1368
1369 case R_MN10300_GOTOFF16:
1370 value -= bfd_get_section_by_name (dynobj,
1371 ".got")->output_section->vma;
1372 value += addend;
1373
1374 if ((long) value > 0xffff || (long) value < -0x10000)
1375 return bfd_reloc_overflow;
1376
1377 bfd_put_16 (input_bfd, value, hit_data);
1378 return bfd_reloc_ok;
1379
1380 case R_MN10300_PLT32:
1381 if (h != NULL
1382 && ELF_ST_VISIBILITY (h->other) != STV_INTERNAL
1383 && ELF_ST_VISIBILITY (h->other) != STV_HIDDEN
1384 && h->plt.offset != (bfd_vma) -1)
1385 {
1386 asection * splt;
1387
1388 splt = bfd_get_section_by_name (dynobj, ".plt");
1389
1390 value = (splt->output_section->vma
1391 + splt->output_offset
1392 + h->plt.offset) - value;
1393 }
1394
1395 value -= (input_section->output_section->vma
1396 + input_section->output_offset);
1397 value -= offset;
1398 value += addend;
1399
1400 bfd_put_32 (input_bfd, value, hit_data);
1401 return bfd_reloc_ok;
1402
1403 case R_MN10300_PLT16:
1404 if (h != NULL
1405 && ELF_ST_VISIBILITY (h->other) != STV_INTERNAL
1406 && ELF_ST_VISIBILITY (h->other) != STV_HIDDEN
1407 && h->plt.offset != (bfd_vma) -1)
1408 {
1409 asection * splt;
1410
1411 splt = bfd_get_section_by_name (dynobj, ".plt");
1412
1413 value = (splt->output_section->vma
1414 + splt->output_offset
1415 + h->plt.offset) - value;
1416 }
1417
1418 value -= (input_section->output_section->vma
1419 + input_section->output_offset);
1420 value -= offset;
1421 value += addend;
1422
1423 if ((long) value > 0xffff || (long) value < -0x10000)
1424 return bfd_reloc_overflow;
1425
1426 bfd_put_16 (input_bfd, value, hit_data);
1427 return bfd_reloc_ok;
1428
1429 case R_MN10300_GOT32:
1430 case R_MN10300_GOT24:
1431 case R_MN10300_GOT16:
1432 {
1433 asection * sgot;
1434
1435 sgot = bfd_get_section_by_name (dynobj, ".got");
1436
1437 if (h != NULL)
1438 {
1439 bfd_vma off;
1440
1441 off = h->got.offset;
1442 BFD_ASSERT (off != (bfd_vma) -1);
1443
1444 if (! elf_hash_table (info)->dynamic_sections_created
1445 || (info->shared
1446 && (info->symbolic || h->dynindx == -1)
1447 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
1448 /* This is actually a static link, or it is a
1449 -Bsymbolic link and the symbol is defined
1450 locally, or the symbol was forced to be local
1451 because of a version file. We must initialize
1452 this entry in the global offset table.
1453
1454 When doing a dynamic link, we create a .rela.got
1455 relocation entry to initialize the value. This
1456 is done in the finish_dynamic_symbol routine. */
1457 bfd_put_32 (output_bfd, value,
1458 sgot->contents + off);
1459
1460 value = sgot->output_offset + off;
1461 }
1462 else
1463 {
1464 bfd_vma off;
1465
1466 off = elf_local_got_offsets (input_bfd)[symndx];
1467
1468 bfd_put_32 (output_bfd, value, sgot->contents + off);
1469
1470 if (info->shared)
1471 {
1472 asection * srelgot;
1473 Elf_Internal_Rela outrel;
1474
1475 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1476 BFD_ASSERT (srelgot != NULL);
1477
1478 outrel.r_offset = (sgot->output_section->vma
1479 + sgot->output_offset
1480 + off);
1481 outrel.r_info = ELF32_R_INFO (0, R_MN10300_RELATIVE);
1482 outrel.r_addend = value;
1483 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
1484 (bfd_byte *) (((Elf32_External_Rela *)
1485 srelgot->contents)
1486 + srelgot->reloc_count));
1487 ++ srelgot->reloc_count;
1488 }
1489
1490 value = sgot->output_offset + off;
1491 }
1492 }
1493
1494 value += addend;
1495
1496 if (r_type == R_MN10300_GOT32)
1497 {
1498 bfd_put_32 (input_bfd, value, hit_data);
1499 return bfd_reloc_ok;
1500 }
1501 else if (r_type == R_MN10300_GOT24)
1502 {
1503 if ((long) value > 0x7fffff || (long) value < -0x800000)
1504 return bfd_reloc_overflow;
1505
1506 bfd_put_8 (input_bfd, value & 0xff, hit_data);
1507 bfd_put_8 (input_bfd, (value >> 8) & 0xff, hit_data + 1);
1508 bfd_put_8 (input_bfd, (value >> 16) & 0xff, hit_data + 2);
1509 return bfd_reloc_ok;
1510 }
1511 else if (r_type == R_MN10300_GOT16)
1512 {
1513 if ((long) value > 0xffff || (long) value < -0x10000)
1514 return bfd_reloc_overflow;
1515
1516 bfd_put_16 (input_bfd, value, hit_data);
1517 return bfd_reloc_ok;
1518 }
1519 /* Fall through. */
1520
1521 default:
1522 return bfd_reloc_notsupported;
1523 }
1524 }
1525
1526 /* Relocate an MN10300 ELF section. */
1527 static bfd_boolean
mn10300_elf_relocate_section(output_bfd,info,input_bfd,input_section,contents,relocs,local_syms,local_sections)1528 mn10300_elf_relocate_section (output_bfd, info, input_bfd, input_section,
1529 contents, relocs, local_syms, local_sections)
1530 bfd *output_bfd;
1531 struct bfd_link_info *info;
1532 bfd *input_bfd;
1533 asection *input_section;
1534 bfd_byte *contents;
1535 Elf_Internal_Rela *relocs;
1536 Elf_Internal_Sym *local_syms;
1537 asection **local_sections;
1538 {
1539 Elf_Internal_Shdr *symtab_hdr;
1540 struct elf_link_hash_entry **sym_hashes;
1541 Elf_Internal_Rela *rel, *relend;
1542
1543 if (info->relocatable)
1544 return TRUE;
1545
1546 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1547 sym_hashes = elf_sym_hashes (input_bfd);
1548
1549 rel = relocs;
1550 relend = relocs + input_section->reloc_count;
1551 for (; rel < relend; rel++)
1552 {
1553 int r_type;
1554 reloc_howto_type *howto;
1555 unsigned long r_symndx;
1556 Elf_Internal_Sym *sym;
1557 asection *sec;
1558 struct elf32_mn10300_link_hash_entry *h;
1559 bfd_vma relocation;
1560 bfd_reloc_status_type r;
1561
1562 r_symndx = ELF32_R_SYM (rel->r_info);
1563 r_type = ELF32_R_TYPE (rel->r_info);
1564 howto = elf_mn10300_howto_table + r_type;
1565
1566 /* Just skip the vtable gc relocs. */
1567 if (r_type == R_MN10300_GNU_VTINHERIT
1568 || r_type == R_MN10300_GNU_VTENTRY)
1569 continue;
1570
1571 h = NULL;
1572 sym = NULL;
1573 sec = NULL;
1574 if (r_symndx < symtab_hdr->sh_info)
1575 {
1576 sym = local_syms + r_symndx;
1577 sec = local_sections[r_symndx];
1578 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1579 }
1580 else
1581 {
1582 bfd_boolean unresolved_reloc;
1583 bfd_boolean warned;
1584 struct elf_link_hash_entry *hh;
1585
1586 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1587 r_symndx, symtab_hdr, sym_hashes,
1588 hh, sec, relocation,
1589 unresolved_reloc, warned);
1590
1591 h = (struct elf32_mn10300_link_hash_entry *) hh;
1592
1593 if ((h->root.root.type == bfd_link_hash_defined
1594 || h->root.root.type == bfd_link_hash_defweak)
1595 && ( r_type == R_MN10300_GOTPC32
1596 || r_type == R_MN10300_GOTPC16
1597 || (( r_type == R_MN10300_PLT32
1598 || r_type == R_MN10300_PLT16)
1599 && ELF_ST_VISIBILITY (h->root.other) != STV_INTERNAL
1600 && ELF_ST_VISIBILITY (h->root.other) != STV_HIDDEN
1601 && h->root.plt.offset != (bfd_vma) -1)
1602 || (( r_type == R_MN10300_GOT32
1603 || r_type == R_MN10300_GOT24
1604 || r_type == R_MN10300_GOT16)
1605 && elf_hash_table (info)->dynamic_sections_created
1606 && (! info->shared
1607 || (! info->symbolic && h->root.dynindx != -1)
1608 || (h->root.elf_link_hash_flags
1609 & ELF_LINK_HASH_DEF_REGULAR) == 0))
1610 || (info->shared
1611 && ((! info->symbolic && h->root.dynindx != -1)
1612 || (h->root.elf_link_hash_flags
1613 & ELF_LINK_HASH_DEF_REGULAR) == 0)
1614 && ( r_type == R_MN10300_32
1615 || r_type == R_MN10300_PCREL32)
1616 && ((input_section->flags & SEC_ALLOC) != 0
1617 /* DWARF will emit R_MN10300_32 relocations
1618 in its sections against symbols defined
1619 externally in shared libraries. We can't
1620 do anything with them here. */
1621 || ((input_section->flags & SEC_DEBUGGING) != 0
1622 && (h->root.elf_link_hash_flags
1623 & ELF_LINK_HASH_DEF_DYNAMIC) != 0)))))
1624 /* In these cases, we don't need the relocation
1625 value. We check specially because in some
1626 obscure cases sec->output_section will be NULL. */
1627 relocation = 0;
1628
1629 else if (unresolved_reloc)
1630 (*_bfd_error_handler)
1631 (_("%s: warning: unresolvable relocation against symbol `%s' from %s section"),
1632 bfd_get_filename (input_bfd), h->root.root.root.string,
1633 bfd_get_section_name (input_bfd, input_section));
1634 }
1635
1636 r = mn10300_elf_final_link_relocate (howto, input_bfd, output_bfd,
1637 input_section,
1638 contents, rel->r_offset,
1639 relocation, rel->r_addend,
1640 (struct elf_link_hash_entry *)h,
1641 r_symndx,
1642 info, sec, h == NULL);
1643
1644 if (r != bfd_reloc_ok)
1645 {
1646 const char *name;
1647 const char *msg = (const char *) 0;
1648
1649 if (h != NULL)
1650 name = h->root.root.root.string;
1651 else
1652 {
1653 name = (bfd_elf_string_from_elf_section
1654 (input_bfd, symtab_hdr->sh_link, sym->st_name));
1655 if (name == NULL || *name == '\0')
1656 name = bfd_section_name (input_bfd, sec);
1657 }
1658
1659 switch (r)
1660 {
1661 case bfd_reloc_overflow:
1662 if (! ((*info->callbacks->reloc_overflow)
1663 (info, name, howto->name, (bfd_vma) 0,
1664 input_bfd, input_section, rel->r_offset)))
1665 return FALSE;
1666 break;
1667
1668 case bfd_reloc_undefined:
1669 if (! ((*info->callbacks->undefined_symbol)
1670 (info, name, input_bfd, input_section,
1671 rel->r_offset, TRUE)))
1672 return FALSE;
1673 break;
1674
1675 case bfd_reloc_outofrange:
1676 msg = _("internal error: out of range error");
1677 goto common_error;
1678
1679 case bfd_reloc_notsupported:
1680 msg = _("internal error: unsupported relocation error");
1681 goto common_error;
1682
1683 case bfd_reloc_dangerous:
1684 msg = _("internal error: dangerous error");
1685 goto common_error;
1686
1687 default:
1688 msg = _("internal error: unknown error");
1689 /* fall through */
1690
1691 common_error:
1692 if (!((*info->callbacks->warning)
1693 (info, msg, name, input_bfd, input_section,
1694 rel->r_offset)))
1695 return FALSE;
1696 break;
1697 }
1698 }
1699 }
1700
1701 return TRUE;
1702 }
1703
1704 /* Finish initializing one hash table entry. */
1705 static bfd_boolean
elf32_mn10300_finish_hash_table_entry(gen_entry,in_args)1706 elf32_mn10300_finish_hash_table_entry (gen_entry, in_args)
1707 struct bfd_hash_entry *gen_entry;
1708 PTR in_args ATTRIBUTE_UNUSED;
1709 {
1710 struct elf32_mn10300_link_hash_entry *entry;
1711 unsigned int byte_count = 0;
1712
1713 entry = (struct elf32_mn10300_link_hash_entry *) gen_entry;
1714
1715 if (entry->root.root.type == bfd_link_hash_warning)
1716 entry = (struct elf32_mn10300_link_hash_entry *) entry->root.root.u.i.link;
1717
1718 /* If we already know we want to convert "call" to "calls" for calls
1719 to this symbol, then return now. */
1720 if (entry->flags == MN10300_CONVERT_CALL_TO_CALLS)
1721 return TRUE;
1722
1723 /* If there are no named calls to this symbol, or there's nothing we
1724 can move from the function itself into the "call" instruction, then
1725 note that all "call" instructions should be converted into "calls"
1726 instructions and return. */
1727 if (entry->direct_calls == 0
1728 || (entry->stack_size == 0 && entry->movm_args == 0))
1729 {
1730 /* Make a note that we should convert "call" instructions to "calls"
1731 instructions for calls to this symbol. */
1732 entry->flags |= MN10300_CONVERT_CALL_TO_CALLS;
1733 return TRUE;
1734 }
1735
1736 /* We may be able to move some instructions from the function itself into
1737 the "call" instruction. Count how many bytes we might be able to
1738 eliminate in the function itself. */
1739
1740 /* A movm instruction is two bytes. */
1741 if (entry->movm_args)
1742 byte_count += 2;
1743
1744 /* Count the insn to allocate stack space too. */
1745 if (entry->stack_size > 0)
1746 {
1747 if (entry->stack_size <= 128)
1748 byte_count += 3;
1749 else
1750 byte_count += 4;
1751 }
1752
1753 /* If using "call" will result in larger code, then turn all
1754 the associated "call" instructions into "calls" instructions. */
1755 if (byte_count < entry->direct_calls)
1756 entry->flags |= MN10300_CONVERT_CALL_TO_CALLS;
1757
1758 /* This routine never fails. */
1759 return TRUE;
1760 }
1761
1762 /* This function handles relaxing for the mn10300.
1763
1764 There are quite a few relaxing opportunities available on the mn10300:
1765
1766 * calls:32 -> calls:16 2 bytes
1767 * call:32 -> call:16 2 bytes
1768
1769 * call:32 -> calls:32 1 byte
1770 * call:16 -> calls:16 1 byte
1771 * These are done anytime using "calls" would result
1772 in smaller code, or when necessary to preserve the
1773 meaning of the program.
1774
1775 * call:32 varies
1776 * call:16
1777 * In some circumstances we can move instructions
1778 from a function prologue into a "call" instruction.
1779 This is only done if the resulting code is no larger
1780 than the original code.
1781
1782 * jmp:32 -> jmp:16 2 bytes
1783 * jmp:16 -> bra:8 1 byte
1784
1785 * If the previous instruction is a conditional branch
1786 around the jump/bra, we may be able to reverse its condition
1787 and change its target to the jump's target. The jump/bra
1788 can then be deleted. 2 bytes
1789
1790 * mov abs32 -> mov abs16 1 or 2 bytes
1791
1792 * Most instructions which accept imm32 can relax to imm16 1 or 2 bytes
1793 - Most instructions which accept imm16 can relax to imm8 1 or 2 bytes
1794
1795 * Most instructions which accept d32 can relax to d16 1 or 2 bytes
1796 - Most instructions which accept d16 can relax to d8 1 or 2 bytes
1797
1798 We don't handle imm16->imm8 or d16->d8 as they're very rare
1799 and somewhat more difficult to support. */
1800
1801 static bfd_boolean
mn10300_elf_relax_section(abfd,sec,link_info,again)1802 mn10300_elf_relax_section (abfd, sec, link_info, again)
1803 bfd *abfd;
1804 asection *sec;
1805 struct bfd_link_info *link_info;
1806 bfd_boolean *again;
1807 {
1808 Elf_Internal_Shdr *symtab_hdr;
1809 Elf_Internal_Rela *internal_relocs = NULL;
1810 Elf_Internal_Rela *irel, *irelend;
1811 bfd_byte *contents = NULL;
1812 Elf_Internal_Sym *isymbuf = NULL;
1813 struct elf32_mn10300_link_hash_table *hash_table;
1814 asection *section = sec;
1815
1816 /* Assume nothing changes. */
1817 *again = FALSE;
1818
1819 /* We need a pointer to the mn10300 specific hash table. */
1820 hash_table = elf32_mn10300_hash_table (link_info);
1821
1822 /* Initialize fields in each hash table entry the first time through. */
1823 if ((hash_table->flags & MN10300_HASH_ENTRIES_INITIALIZED) == 0)
1824 {
1825 bfd *input_bfd;
1826
1827 /* Iterate over all the input bfds. */
1828 for (input_bfd = link_info->input_bfds;
1829 input_bfd != NULL;
1830 input_bfd = input_bfd->link_next)
1831 {
1832 /* We're going to need all the symbols for each bfd. */
1833 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1834 if (symtab_hdr->sh_info != 0)
1835 {
1836 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1837 if (isymbuf == NULL)
1838 isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
1839 symtab_hdr->sh_info, 0,
1840 NULL, NULL, NULL);
1841 if (isymbuf == NULL)
1842 goto error_return;
1843 }
1844
1845 /* Iterate over each section in this bfd. */
1846 for (section = input_bfd->sections;
1847 section != NULL;
1848 section = section->next)
1849 {
1850 struct elf32_mn10300_link_hash_entry *hash;
1851 Elf_Internal_Sym *sym;
1852 asection *sym_sec = NULL;
1853 const char *sym_name;
1854 char *new_name;
1855
1856 /* If there's nothing to do in this section, skip it. */
1857 if (! (((section->flags & SEC_RELOC) != 0
1858 && section->reloc_count != 0)
1859 || (section->flags & SEC_CODE) != 0))
1860 continue;
1861
1862 /* Get cached copy of section contents if it exists. */
1863 if (elf_section_data (section)->this_hdr.contents != NULL)
1864 contents = elf_section_data (section)->this_hdr.contents;
1865 else if (section->_raw_size != 0)
1866 {
1867 /* Go get them off disk. */
1868 contents = (bfd_byte *) bfd_malloc (section->_raw_size);
1869 if (contents == NULL)
1870 goto error_return;
1871
1872 if (!bfd_get_section_contents (input_bfd, section,
1873 contents, (file_ptr) 0,
1874 section->_raw_size))
1875 goto error_return;
1876 }
1877 else
1878 contents = NULL;
1879
1880 /* If there aren't any relocs, then there's nothing to do. */
1881 if ((section->flags & SEC_RELOC) != 0
1882 && section->reloc_count != 0)
1883 {
1884
1885 /* Get a copy of the native relocations. */
1886 internal_relocs = (_bfd_elf_link_read_relocs
1887 (input_bfd, section, (PTR) NULL,
1888 (Elf_Internal_Rela *) NULL,
1889 link_info->keep_memory));
1890 if (internal_relocs == NULL)
1891 goto error_return;
1892
1893 /* Now examine each relocation. */
1894 irel = internal_relocs;
1895 irelend = irel + section->reloc_count;
1896 for (; irel < irelend; irel++)
1897 {
1898 long r_type;
1899 unsigned long r_index;
1900 unsigned char code;
1901
1902 r_type = ELF32_R_TYPE (irel->r_info);
1903 r_index = ELF32_R_SYM (irel->r_info);
1904
1905 if (r_type < 0 || r_type >= (int) R_MN10300_MAX)
1906 goto error_return;
1907
1908 /* We need the name and hash table entry of the target
1909 symbol! */
1910 hash = NULL;
1911 sym = NULL;
1912 sym_sec = NULL;
1913
1914 if (r_index < symtab_hdr->sh_info)
1915 {
1916 /* A local symbol. */
1917 Elf_Internal_Sym *isym;
1918 struct elf_link_hash_table *elftab;
1919 bfd_size_type amt;
1920
1921 isym = isymbuf + r_index;
1922 if (isym->st_shndx == SHN_UNDEF)
1923 sym_sec = bfd_und_section_ptr;
1924 else if (isym->st_shndx == SHN_ABS)
1925 sym_sec = bfd_abs_section_ptr;
1926 else if (isym->st_shndx == SHN_COMMON)
1927 sym_sec = bfd_com_section_ptr;
1928 else
1929 sym_sec
1930 = bfd_section_from_elf_index (input_bfd,
1931 isym->st_shndx);
1932
1933 sym_name
1934 = bfd_elf_string_from_elf_section (input_bfd,
1935 (symtab_hdr
1936 ->sh_link),
1937 isym->st_name);
1938
1939 /* If it isn't a function, then we don't care
1940 about it. */
1941 if (ELF_ST_TYPE (isym->st_info) != STT_FUNC)
1942 continue;
1943
1944 /* Tack on an ID so we can uniquely identify this
1945 local symbol in the global hash table. */
1946 amt = strlen (sym_name) + 10;
1947 new_name = bfd_malloc (amt);
1948 if (new_name == 0)
1949 goto error_return;
1950
1951 sprintf (new_name, "%s_%08x",
1952 sym_name, (int) sym_sec);
1953 sym_name = new_name;
1954
1955 elftab = &hash_table->static_hash_table->root;
1956 hash = ((struct elf32_mn10300_link_hash_entry *)
1957 elf_link_hash_lookup (elftab, sym_name,
1958 TRUE, TRUE, FALSE));
1959 free (new_name);
1960 }
1961 else
1962 {
1963 r_index -= symtab_hdr->sh_info;
1964 hash = (struct elf32_mn10300_link_hash_entry *)
1965 elf_sym_hashes (input_bfd)[r_index];
1966 }
1967
1968 /* If this is not a "call" instruction, then we
1969 should convert "call" instructions to "calls"
1970 instructions. */
1971 code = bfd_get_8 (input_bfd,
1972 contents + irel->r_offset - 1);
1973 if (code != 0xdd && code != 0xcd)
1974 hash->flags |= MN10300_CONVERT_CALL_TO_CALLS;
1975
1976 /* If this is a jump/call, then bump the
1977 direct_calls counter. Else force "call" to
1978 "calls" conversions. */
1979 if (r_type == R_MN10300_PCREL32
1980 || r_type == R_MN10300_PLT32
1981 || r_type == R_MN10300_PLT16
1982 || r_type == R_MN10300_PCREL16)
1983 hash->direct_calls++;
1984 else
1985 hash->flags |= MN10300_CONVERT_CALL_TO_CALLS;
1986 }
1987 }
1988
1989 /* Now look at the actual contents to get the stack size,
1990 and a list of what registers were saved in the prologue
1991 (ie movm_args). */
1992 if ((section->flags & SEC_CODE) != 0)
1993 {
1994 Elf_Internal_Sym *isym, *isymend;
1995 unsigned int sec_shndx;
1996 struct elf_link_hash_entry **hashes;
1997 struct elf_link_hash_entry **end_hashes;
1998 unsigned int symcount;
1999
2000 sec_shndx = _bfd_elf_section_from_bfd_section (input_bfd,
2001 section);
2002
2003 /* Look at each function defined in this section and
2004 update info for that function. */
2005 isymend = isymbuf + symtab_hdr->sh_info;
2006 for (isym = isymbuf; isym < isymend; isym++)
2007 {
2008 if (isym->st_shndx == sec_shndx
2009 && ELF_ST_TYPE (isym->st_info) == STT_FUNC)
2010 {
2011 struct elf_link_hash_table *elftab;
2012 bfd_size_type amt;
2013
2014 if (isym->st_shndx == SHN_UNDEF)
2015 sym_sec = bfd_und_section_ptr;
2016 else if (isym->st_shndx == SHN_ABS)
2017 sym_sec = bfd_abs_section_ptr;
2018 else if (isym->st_shndx == SHN_COMMON)
2019 sym_sec = bfd_com_section_ptr;
2020 else
2021 sym_sec
2022 = bfd_section_from_elf_index (input_bfd,
2023 isym->st_shndx);
2024
2025 sym_name = (bfd_elf_string_from_elf_section
2026 (input_bfd, symtab_hdr->sh_link,
2027 isym->st_name));
2028
2029 /* Tack on an ID so we can uniquely identify this
2030 local symbol in the global hash table. */
2031 amt = strlen (sym_name) + 10;
2032 new_name = bfd_malloc (amt);
2033 if (new_name == 0)
2034 goto error_return;
2035
2036 sprintf (new_name, "%s_%08x",
2037 sym_name, (int) sym_sec);
2038 sym_name = new_name;
2039
2040 elftab = &hash_table->static_hash_table->root;
2041 hash = ((struct elf32_mn10300_link_hash_entry *)
2042 elf_link_hash_lookup (elftab, sym_name,
2043 TRUE, TRUE, FALSE));
2044 free (new_name);
2045 compute_function_info (input_bfd, hash,
2046 isym->st_value, contents);
2047 }
2048 }
2049
2050 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
2051 - symtab_hdr->sh_info);
2052 hashes = elf_sym_hashes (input_bfd);
2053 end_hashes = hashes + symcount;
2054 for (; hashes < end_hashes; hashes++)
2055 {
2056 hash = (struct elf32_mn10300_link_hash_entry *) *hashes;
2057 if ((hash->root.root.type == bfd_link_hash_defined
2058 || hash->root.root.type == bfd_link_hash_defweak)
2059 && hash->root.root.u.def.section == section
2060 && ELF_ST_TYPE (isym->st_info) == STT_FUNC)
2061 compute_function_info (input_bfd, hash,
2062 (hash)->root.root.u.def.value,
2063 contents);
2064 }
2065 }
2066
2067 /* Cache or free any memory we allocated for the relocs. */
2068 if (internal_relocs != NULL
2069 && elf_section_data (section)->relocs != internal_relocs)
2070 free (internal_relocs);
2071 internal_relocs = NULL;
2072
2073 /* Cache or free any memory we allocated for the contents. */
2074 if (contents != NULL
2075 && elf_section_data (section)->this_hdr.contents != contents)
2076 {
2077 if (! link_info->keep_memory)
2078 free (contents);
2079 else
2080 {
2081 /* Cache the section contents for elf_link_input_bfd. */
2082 elf_section_data (section)->this_hdr.contents = contents;
2083 }
2084 }
2085 contents = NULL;
2086 }
2087
2088 /* Cache or free any memory we allocated for the symbols. */
2089 if (isymbuf != NULL
2090 && symtab_hdr->contents != (unsigned char *) isymbuf)
2091 {
2092 if (! link_info->keep_memory)
2093 free (isymbuf);
2094 else
2095 {
2096 /* Cache the symbols for elf_link_input_bfd. */
2097 symtab_hdr->contents = (unsigned char *) isymbuf;
2098 }
2099 }
2100 isymbuf = NULL;
2101 }
2102
2103 /* Now iterate on each symbol in the hash table and perform
2104 the final initialization steps on each. */
2105 elf32_mn10300_link_hash_traverse (hash_table,
2106 elf32_mn10300_finish_hash_table_entry,
2107 NULL);
2108 elf32_mn10300_link_hash_traverse (hash_table->static_hash_table,
2109 elf32_mn10300_finish_hash_table_entry,
2110 NULL);
2111
2112 /* All entries in the hash table are fully initialized. */
2113 hash_table->flags |= MN10300_HASH_ENTRIES_INITIALIZED;
2114
2115 /* Now that everything has been initialized, go through each
2116 code section and delete any prologue insns which will be
2117 redundant because their operations will be performed by
2118 a "call" instruction. */
2119 for (input_bfd = link_info->input_bfds;
2120 input_bfd != NULL;
2121 input_bfd = input_bfd->link_next)
2122 {
2123 /* We're going to need all the local symbols for each bfd. */
2124 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2125 if (symtab_hdr->sh_info != 0)
2126 {
2127 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
2128 if (isymbuf == NULL)
2129 isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
2130 symtab_hdr->sh_info, 0,
2131 NULL, NULL, NULL);
2132 if (isymbuf == NULL)
2133 goto error_return;
2134 }
2135
2136 /* Walk over each section in this bfd. */
2137 for (section = input_bfd->sections;
2138 section != NULL;
2139 section = section->next)
2140 {
2141 unsigned int sec_shndx;
2142 Elf_Internal_Sym *isym, *isymend;
2143 struct elf_link_hash_entry **hashes;
2144 struct elf_link_hash_entry **end_hashes;
2145 unsigned int symcount;
2146
2147 /* Skip non-code sections and empty sections. */
2148 if ((section->flags & SEC_CODE) == 0 || section->_raw_size == 0)
2149 continue;
2150
2151 if (section->reloc_count != 0)
2152 {
2153 /* Get a copy of the native relocations. */
2154 internal_relocs = (_bfd_elf_link_read_relocs
2155 (input_bfd, section, (PTR) NULL,
2156 (Elf_Internal_Rela *) NULL,
2157 link_info->keep_memory));
2158 if (internal_relocs == NULL)
2159 goto error_return;
2160 }
2161
2162 /* Get cached copy of section contents if it exists. */
2163 if (elf_section_data (section)->this_hdr.contents != NULL)
2164 contents = elf_section_data (section)->this_hdr.contents;
2165 else
2166 {
2167 /* Go get them off disk. */
2168 contents = (bfd_byte *) bfd_malloc (section->_raw_size);
2169 if (contents == NULL)
2170 goto error_return;
2171
2172 if (!bfd_get_section_contents (input_bfd, section,
2173 contents, (file_ptr) 0,
2174 section->_raw_size))
2175 goto error_return;
2176 }
2177
2178 sec_shndx = _bfd_elf_section_from_bfd_section (input_bfd,
2179 section);
2180
2181 /* Now look for any function in this section which needs
2182 insns deleted from its prologue. */
2183 isymend = isymbuf + symtab_hdr->sh_info;
2184 for (isym = isymbuf; isym < isymend; isym++)
2185 {
2186 struct elf32_mn10300_link_hash_entry *sym_hash;
2187 asection *sym_sec = NULL;
2188 const char *sym_name;
2189 char *new_name;
2190 struct elf_link_hash_table *elftab;
2191 bfd_size_type amt;
2192
2193 if (isym->st_shndx != sec_shndx)
2194 continue;
2195
2196 if (isym->st_shndx == SHN_UNDEF)
2197 sym_sec = bfd_und_section_ptr;
2198 else if (isym->st_shndx == SHN_ABS)
2199 sym_sec = bfd_abs_section_ptr;
2200 else if (isym->st_shndx == SHN_COMMON)
2201 sym_sec = bfd_com_section_ptr;
2202 else
2203 sym_sec
2204 = bfd_section_from_elf_index (input_bfd, isym->st_shndx);
2205
2206 sym_name
2207 = bfd_elf_string_from_elf_section (input_bfd,
2208 symtab_hdr->sh_link,
2209 isym->st_name);
2210
2211 /* Tack on an ID so we can uniquely identify this
2212 local symbol in the global hash table. */
2213 amt = strlen (sym_name) + 10;
2214 new_name = bfd_malloc (amt);
2215 if (new_name == 0)
2216 goto error_return;
2217 sprintf (new_name, "%s_%08x", sym_name, (int) sym_sec);
2218 sym_name = new_name;
2219
2220 elftab = &hash_table->static_hash_table->root;
2221 sym_hash = ((struct elf32_mn10300_link_hash_entry *)
2222 elf_link_hash_lookup (elftab, sym_name,
2223 FALSE, FALSE, FALSE));
2224
2225 free (new_name);
2226 if (sym_hash == NULL)
2227 continue;
2228
2229 if (! (sym_hash->flags & MN10300_CONVERT_CALL_TO_CALLS)
2230 && ! (sym_hash->flags & MN10300_DELETED_PROLOGUE_BYTES))
2231 {
2232 int bytes = 0;
2233
2234 /* Note that we've changed things. */
2235 elf_section_data (section)->relocs = internal_relocs;
2236 elf_section_data (section)->this_hdr.contents = contents;
2237 symtab_hdr->contents = (unsigned char *) isymbuf;
2238
2239 /* Count how many bytes we're going to delete. */
2240 if (sym_hash->movm_args)
2241 bytes += 2;
2242
2243 if (sym_hash->stack_size > 0)
2244 {
2245 if (sym_hash->stack_size <= 128)
2246 bytes += 3;
2247 else
2248 bytes += 4;
2249 }
2250
2251 /* Note that we've deleted prologue bytes for this
2252 function. */
2253 sym_hash->flags |= MN10300_DELETED_PROLOGUE_BYTES;
2254
2255 /* Actually delete the bytes. */
2256 if (!mn10300_elf_relax_delete_bytes (input_bfd,
2257 section,
2258 isym->st_value,
2259 bytes))
2260 goto error_return;
2261
2262 /* Something changed. Not strictly necessary, but
2263 may lead to more relaxing opportunities. */
2264 *again = TRUE;
2265 }
2266 }
2267
2268 /* Look for any global functions in this section which
2269 need insns deleted from their prologues. */
2270 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
2271 - symtab_hdr->sh_info);
2272 hashes = elf_sym_hashes (input_bfd);
2273 end_hashes = hashes + symcount;
2274 for (; hashes < end_hashes; hashes++)
2275 {
2276 struct elf32_mn10300_link_hash_entry *sym_hash;
2277
2278 sym_hash = (struct elf32_mn10300_link_hash_entry *) *hashes;
2279 if ((sym_hash->root.root.type == bfd_link_hash_defined
2280 || sym_hash->root.root.type == bfd_link_hash_defweak)
2281 && sym_hash->root.root.u.def.section == section
2282 && ! (sym_hash->flags & MN10300_CONVERT_CALL_TO_CALLS)
2283 && ! (sym_hash->flags & MN10300_DELETED_PROLOGUE_BYTES))
2284 {
2285 int bytes = 0;
2286 bfd_vma symval;
2287
2288 /* Note that we've changed things. */
2289 elf_section_data (section)->relocs = internal_relocs;
2290 elf_section_data (section)->this_hdr.contents = contents;
2291 symtab_hdr->contents = (unsigned char *) isymbuf;
2292
2293 /* Count how many bytes we're going to delete. */
2294 if (sym_hash->movm_args)
2295 bytes += 2;
2296
2297 if (sym_hash->stack_size > 0)
2298 {
2299 if (sym_hash->stack_size <= 128)
2300 bytes += 3;
2301 else
2302 bytes += 4;
2303 }
2304
2305 /* Note that we've deleted prologue bytes for this
2306 function. */
2307 sym_hash->flags |= MN10300_DELETED_PROLOGUE_BYTES;
2308
2309 /* Actually delete the bytes. */
2310 symval = sym_hash->root.root.u.def.value;
2311 if (!mn10300_elf_relax_delete_bytes (input_bfd,
2312 section,
2313 symval,
2314 bytes))
2315 goto error_return;
2316
2317 /* Something changed. Not strictly necessary, but
2318 may lead to more relaxing opportunities. */
2319 *again = TRUE;
2320 }
2321 }
2322
2323 /* Cache or free any memory we allocated for the relocs. */
2324 if (internal_relocs != NULL
2325 && elf_section_data (section)->relocs != internal_relocs)
2326 free (internal_relocs);
2327 internal_relocs = NULL;
2328
2329 /* Cache or free any memory we allocated for the contents. */
2330 if (contents != NULL
2331 && elf_section_data (section)->this_hdr.contents != contents)
2332 {
2333 if (! link_info->keep_memory)
2334 free (contents);
2335 else
2336 {
2337 /* Cache the section contents for elf_link_input_bfd. */
2338 elf_section_data (section)->this_hdr.contents = contents;
2339 }
2340 }
2341 contents = NULL;
2342 }
2343
2344 /* Cache or free any memory we allocated for the symbols. */
2345 if (isymbuf != NULL
2346 && symtab_hdr->contents != (unsigned char *) isymbuf)
2347 {
2348 if (! link_info->keep_memory)
2349 free (isymbuf);
2350 else
2351 {
2352 /* Cache the symbols for elf_link_input_bfd. */
2353 symtab_hdr->contents = (unsigned char *) isymbuf;
2354 }
2355 }
2356 isymbuf = NULL;
2357 }
2358 }
2359
2360 /* (Re)initialize for the basic instruction shortening/relaxing pass. */
2361 contents = NULL;
2362 internal_relocs = NULL;
2363 isymbuf = NULL;
2364 /* For error_return. */
2365 section = sec;
2366
2367 /* We don't have to do anything for a relocatable link, if
2368 this section does not have relocs, or if this is not a
2369 code section. */
2370 if (link_info->relocatable
2371 || (sec->flags & SEC_RELOC) == 0
2372 || sec->reloc_count == 0
2373 || (sec->flags & SEC_CODE) == 0)
2374 return TRUE;
2375
2376 /* If this is the first time we have been called for this section,
2377 initialize the cooked size. */
2378 if (sec->_cooked_size == 0)
2379 sec->_cooked_size = sec->_raw_size;
2380
2381 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2382
2383 /* Get a copy of the native relocations. */
2384 internal_relocs = (_bfd_elf_link_read_relocs
2385 (abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
2386 link_info->keep_memory));
2387 if (internal_relocs == NULL)
2388 goto error_return;
2389
2390 /* Walk through them looking for relaxing opportunities. */
2391 irelend = internal_relocs + sec->reloc_count;
2392 for (irel = internal_relocs; irel < irelend; irel++)
2393 {
2394 bfd_vma symval;
2395 struct elf32_mn10300_link_hash_entry *h = NULL;
2396
2397 /* If this isn't something that can be relaxed, then ignore
2398 this reloc. */
2399 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_NONE
2400 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_8
2401 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_MAX)
2402 continue;
2403
2404 /* Get the section contents if we haven't done so already. */
2405 if (contents == NULL)
2406 {
2407 /* Get cached copy if it exists. */
2408 if (elf_section_data (sec)->this_hdr.contents != NULL)
2409 contents = elf_section_data (sec)->this_hdr.contents;
2410 else
2411 {
2412 /* Go get them off disk. */
2413 contents = (bfd_byte *) bfd_malloc (sec->_raw_size);
2414 if (contents == NULL)
2415 goto error_return;
2416
2417 if (! bfd_get_section_contents (abfd, sec, contents,
2418 (file_ptr) 0, sec->_raw_size))
2419 goto error_return;
2420 }
2421 }
2422
2423 /* Read this BFD's symbols if we haven't done so already. */
2424 if (isymbuf == NULL && symtab_hdr->sh_info != 0)
2425 {
2426 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
2427 if (isymbuf == NULL)
2428 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
2429 symtab_hdr->sh_info, 0,
2430 NULL, NULL, NULL);
2431 if (isymbuf == NULL)
2432 goto error_return;
2433 }
2434
2435 /* Get the value of the symbol referred to by the reloc. */
2436 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
2437 {
2438 Elf_Internal_Sym *isym;
2439 asection *sym_sec = NULL;
2440 const char *sym_name;
2441 char *new_name;
2442
2443 /* A local symbol. */
2444 isym = isymbuf + ELF32_R_SYM (irel->r_info);
2445 if (isym->st_shndx == SHN_UNDEF)
2446 sym_sec = bfd_und_section_ptr;
2447 else if (isym->st_shndx == SHN_ABS)
2448 sym_sec = bfd_abs_section_ptr;
2449 else if (isym->st_shndx == SHN_COMMON)
2450 sym_sec = bfd_com_section_ptr;
2451 else
2452 sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
2453
2454 symval = (isym->st_value
2455 + sym_sec->output_section->vma
2456 + sym_sec->output_offset);
2457 sym_name = bfd_elf_string_from_elf_section (abfd,
2458 symtab_hdr->sh_link,
2459 isym->st_name);
2460
2461 /* Tack on an ID so we can uniquely identify this
2462 local symbol in the global hash table. */
2463 new_name = bfd_malloc ((bfd_size_type) strlen (sym_name) + 10);
2464 if (new_name == 0)
2465 goto error_return;
2466 sprintf (new_name, "%s_%08x", sym_name, (int) sym_sec);
2467 sym_name = new_name;
2468
2469 h = (struct elf32_mn10300_link_hash_entry *)
2470 elf_link_hash_lookup (&hash_table->static_hash_table->root,
2471 sym_name, FALSE, FALSE, FALSE);
2472 free (new_name);
2473 }
2474 else
2475 {
2476 unsigned long indx;
2477
2478 /* An external symbol. */
2479 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
2480 h = (struct elf32_mn10300_link_hash_entry *)
2481 (elf_sym_hashes (abfd)[indx]);
2482 BFD_ASSERT (h != NULL);
2483 if (h->root.root.type != bfd_link_hash_defined
2484 && h->root.root.type != bfd_link_hash_defweak)
2485 {
2486 /* This appears to be a reference to an undefined
2487 symbol. Just ignore it--it will be caught by the
2488 regular reloc processing. */
2489 continue;
2490 }
2491
2492 symval = (h->root.root.u.def.value
2493 + h->root.root.u.def.section->output_section->vma
2494 + h->root.root.u.def.section->output_offset);
2495 }
2496
2497 /* For simplicity of coding, we are going to modify the section
2498 contents, the section relocs, and the BFD symbol table. We
2499 must tell the rest of the code not to free up this
2500 information. It would be possible to instead create a table
2501 of changes which have to be made, as is done in coff-mips.c;
2502 that would be more work, but would require less memory when
2503 the linker is run. */
2504
2505 /* Try to turn a 32bit pc-relative branch/call into a 16bit pc-relative
2506 branch/call, also deal with "call" -> "calls" conversions and
2507 insertion of prologue data into "call" instructions. */
2508 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL32
2509 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PLT32)
2510 {
2511 bfd_vma value = symval;
2512
2513 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PLT32
2514 && h != NULL
2515 && ELF_ST_VISIBILITY (h->root.other) != STV_INTERNAL
2516 && ELF_ST_VISIBILITY (h->root.other) != STV_HIDDEN
2517 && h->root.plt.offset != (bfd_vma) -1)
2518 {
2519 asection * splt;
2520
2521 splt = bfd_get_section_by_name (elf_hash_table (link_info)
2522 ->dynobj, ".plt");
2523
2524 value = ((splt->output_section->vma
2525 + splt->output_offset
2526 + h->root.plt.offset)
2527 - (sec->output_section->vma
2528 + sec->output_offset
2529 + irel->r_offset));
2530 }
2531
2532 /* If we've got a "call" instruction that needs to be turned
2533 into a "calls" instruction, do so now. It saves a byte. */
2534 if (h && (h->flags & MN10300_CONVERT_CALL_TO_CALLS))
2535 {
2536 unsigned char code;
2537
2538 /* Get the opcode. */
2539 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2540
2541 /* Make sure we're working with a "call" instruction! */
2542 if (code == 0xdd)
2543 {
2544 /* Note that we've changed the relocs, section contents,
2545 etc. */
2546 elf_section_data (sec)->relocs = internal_relocs;
2547 elf_section_data (sec)->this_hdr.contents = contents;
2548 symtab_hdr->contents = (unsigned char *) isymbuf;
2549
2550 /* Fix the opcode. */
2551 bfd_put_8 (abfd, 0xfc, contents + irel->r_offset - 1);
2552 bfd_put_8 (abfd, 0xff, contents + irel->r_offset);
2553
2554 /* Fix irel->r_offset and irel->r_addend. */
2555 irel->r_offset += 1;
2556 irel->r_addend += 1;
2557
2558 /* Delete one byte of data. */
2559 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2560 irel->r_offset + 3, 1))
2561 goto error_return;
2562
2563 /* That will change things, so, we should relax again.
2564 Note that this is not required, and it may be slow. */
2565 *again = TRUE;
2566 }
2567 }
2568 else if (h)
2569 {
2570 /* We've got a "call" instruction which needs some data
2571 from target function filled in. */
2572 unsigned char code;
2573
2574 /* Get the opcode. */
2575 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2576
2577 /* Insert data from the target function into the "call"
2578 instruction if needed. */
2579 if (code == 0xdd)
2580 {
2581 bfd_put_8 (abfd, h->movm_args, contents + irel->r_offset + 4);
2582 bfd_put_8 (abfd, h->stack_size + h->movm_stack_size,
2583 contents + irel->r_offset + 5);
2584 }
2585 }
2586
2587 /* Deal with pc-relative gunk. */
2588 value -= (sec->output_section->vma + sec->output_offset);
2589 value -= irel->r_offset;
2590 value += irel->r_addend;
2591
2592 /* See if the value will fit in 16 bits, note the high value is
2593 0x7fff + 2 as the target will be two bytes closer if we are
2594 able to relax. */
2595 if ((long) value < 0x8001 && (long) value > -0x8000)
2596 {
2597 unsigned char code;
2598
2599 /* Get the opcode. */
2600 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2601
2602 if (code != 0xdc && code != 0xdd && code != 0xff)
2603 continue;
2604
2605 /* Note that we've changed the relocs, section contents, etc. */
2606 elf_section_data (sec)->relocs = internal_relocs;
2607 elf_section_data (sec)->this_hdr.contents = contents;
2608 symtab_hdr->contents = (unsigned char *) isymbuf;
2609
2610 /* Fix the opcode. */
2611 if (code == 0xdc)
2612 bfd_put_8 (abfd, 0xcc, contents + irel->r_offset - 1);
2613 else if (code == 0xdd)
2614 bfd_put_8 (abfd, 0xcd, contents + irel->r_offset - 1);
2615 else if (code == 0xff)
2616 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
2617
2618 /* Fix the relocation's type. */
2619 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2620 (ELF32_R_TYPE (irel->r_info)
2621 == (int) R_MN10300_PLT32)
2622 ? R_MN10300_PLT16 :
2623 R_MN10300_PCREL16);
2624
2625 /* Delete two bytes of data. */
2626 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2627 irel->r_offset + 1, 2))
2628 goto error_return;
2629
2630 /* That will change things, so, we should relax again.
2631 Note that this is not required, and it may be slow. */
2632 *again = TRUE;
2633 }
2634 }
2635
2636 /* Try to turn a 16bit pc-relative branch into a 8bit pc-relative
2637 branch. */
2638 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL16)
2639 {
2640 bfd_vma value = symval;
2641
2642 /* If we've got a "call" instruction that needs to be turned
2643 into a "calls" instruction, do so now. It saves a byte. */
2644 if (h && (h->flags & MN10300_CONVERT_CALL_TO_CALLS))
2645 {
2646 unsigned char code;
2647
2648 /* Get the opcode. */
2649 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2650
2651 /* Make sure we're working with a "call" instruction! */
2652 if (code == 0xcd)
2653 {
2654 /* Note that we've changed the relocs, section contents,
2655 etc. */
2656 elf_section_data (sec)->relocs = internal_relocs;
2657 elf_section_data (sec)->this_hdr.contents = contents;
2658 symtab_hdr->contents = (unsigned char *) isymbuf;
2659
2660 /* Fix the opcode. */
2661 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 1);
2662 bfd_put_8 (abfd, 0xff, contents + irel->r_offset);
2663
2664 /* Fix irel->r_offset and irel->r_addend. */
2665 irel->r_offset += 1;
2666 irel->r_addend += 1;
2667
2668 /* Delete one byte of data. */
2669 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2670 irel->r_offset + 1, 1))
2671 goto error_return;
2672
2673 /* That will change things, so, we should relax again.
2674 Note that this is not required, and it may be slow. */
2675 *again = TRUE;
2676 }
2677 }
2678 else if (h)
2679 {
2680 unsigned char code;
2681
2682 /* Get the opcode. */
2683 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2684
2685 /* Insert data from the target function into the "call"
2686 instruction if needed. */
2687 if (code == 0xcd)
2688 {
2689 bfd_put_8 (abfd, h->movm_args, contents + irel->r_offset + 2);
2690 bfd_put_8 (abfd, h->stack_size + h->movm_stack_size,
2691 contents + irel->r_offset + 3);
2692 }
2693 }
2694
2695 /* Deal with pc-relative gunk. */
2696 value -= (sec->output_section->vma + sec->output_offset);
2697 value -= irel->r_offset;
2698 value += irel->r_addend;
2699
2700 /* See if the value will fit in 8 bits, note the high value is
2701 0x7f + 1 as the target will be one bytes closer if we are
2702 able to relax. */
2703 if ((long) value < 0x80 && (long) value > -0x80)
2704 {
2705 unsigned char code;
2706
2707 /* Get the opcode. */
2708 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2709
2710 if (code != 0xcc)
2711 continue;
2712
2713 /* Note that we've changed the relocs, section contents, etc. */
2714 elf_section_data (sec)->relocs = internal_relocs;
2715 elf_section_data (sec)->this_hdr.contents = contents;
2716 symtab_hdr->contents = (unsigned char *) isymbuf;
2717
2718 /* Fix the opcode. */
2719 bfd_put_8 (abfd, 0xca, contents + irel->r_offset - 1);
2720
2721 /* Fix the relocation's type. */
2722 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2723 R_MN10300_PCREL8);
2724
2725 /* Delete one byte of data. */
2726 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2727 irel->r_offset + 1, 1))
2728 goto error_return;
2729
2730 /* That will change things, so, we should relax again.
2731 Note that this is not required, and it may be slow. */
2732 *again = TRUE;
2733 }
2734 }
2735
2736 /* Try to eliminate an unconditional 8 bit pc-relative branch
2737 which immediately follows a conditional 8 bit pc-relative
2738 branch around the unconditional branch.
2739
2740 original: new:
2741 bCC lab1 bCC' lab2
2742 bra lab2
2743 lab1: lab1:
2744
2745 This happens when the bCC can't reach lab2 at assembly time,
2746 but due to other relaxations it can reach at link time. */
2747 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL8)
2748 {
2749 Elf_Internal_Rela *nrel;
2750 bfd_vma value = symval;
2751 unsigned char code;
2752
2753 /* Deal with pc-relative gunk. */
2754 value -= (sec->output_section->vma + sec->output_offset);
2755 value -= irel->r_offset;
2756 value += irel->r_addend;
2757
2758 /* Do nothing if this reloc is the last byte in the section. */
2759 if (irel->r_offset == sec->_cooked_size)
2760 continue;
2761
2762 /* See if the next instruction is an unconditional pc-relative
2763 branch, more often than not this test will fail, so we
2764 test it first to speed things up. */
2765 code = bfd_get_8 (abfd, contents + irel->r_offset + 1);
2766 if (code != 0xca)
2767 continue;
2768
2769 /* Also make sure the next relocation applies to the next
2770 instruction and that it's a pc-relative 8 bit branch. */
2771 nrel = irel + 1;
2772 if (nrel == irelend
2773 || irel->r_offset + 2 != nrel->r_offset
2774 || ELF32_R_TYPE (nrel->r_info) != (int) R_MN10300_PCREL8)
2775 continue;
2776
2777 /* Make sure our destination immediately follows the
2778 unconditional branch. */
2779 if (symval != (sec->output_section->vma + sec->output_offset
2780 + irel->r_offset + 3))
2781 continue;
2782
2783 /* Now make sure we are a conditional branch. This may not
2784 be necessary, but why take the chance.
2785
2786 Note these checks assume that R_MN10300_PCREL8 relocs
2787 only occur on bCC and bCCx insns. If they occured
2788 elsewhere, we'd need to know the start of this insn
2789 for this check to be accurate. */
2790 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2791 if (code != 0xc0 && code != 0xc1 && code != 0xc2
2792 && code != 0xc3 && code != 0xc4 && code != 0xc5
2793 && code != 0xc6 && code != 0xc7 && code != 0xc8
2794 && code != 0xc9 && code != 0xe8 && code != 0xe9
2795 && code != 0xea && code != 0xeb)
2796 continue;
2797
2798 /* We also have to be sure there is no symbol/label
2799 at the unconditional branch. */
2800 if (mn10300_elf_symbol_address_p (abfd, sec, isymbuf,
2801 irel->r_offset + 1))
2802 continue;
2803
2804 /* Note that we've changed the relocs, section contents, etc. */
2805 elf_section_data (sec)->relocs = internal_relocs;
2806 elf_section_data (sec)->this_hdr.contents = contents;
2807 symtab_hdr->contents = (unsigned char *) isymbuf;
2808
2809 /* Reverse the condition of the first branch. */
2810 switch (code)
2811 {
2812 case 0xc8:
2813 code = 0xc9;
2814 break;
2815 case 0xc9:
2816 code = 0xc8;
2817 break;
2818 case 0xc0:
2819 code = 0xc2;
2820 break;
2821 case 0xc2:
2822 code = 0xc0;
2823 break;
2824 case 0xc3:
2825 code = 0xc1;
2826 break;
2827 case 0xc1:
2828 code = 0xc3;
2829 break;
2830 case 0xc4:
2831 code = 0xc6;
2832 break;
2833 case 0xc6:
2834 code = 0xc4;
2835 break;
2836 case 0xc7:
2837 code = 0xc5;
2838 break;
2839 case 0xc5:
2840 code = 0xc7;
2841 break;
2842 case 0xe8:
2843 code = 0xe9;
2844 break;
2845 case 0x9d:
2846 code = 0xe8;
2847 break;
2848 case 0xea:
2849 code = 0xeb;
2850 break;
2851 case 0xeb:
2852 code = 0xea;
2853 break;
2854 }
2855 bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
2856
2857 /* Set the reloc type and symbol for the first branch
2858 from the second branch. */
2859 irel->r_info = nrel->r_info;
2860
2861 /* Make the reloc for the second branch a null reloc. */
2862 nrel->r_info = ELF32_R_INFO (ELF32_R_SYM (nrel->r_info),
2863 R_MN10300_NONE);
2864
2865 /* Delete two bytes of data. */
2866 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2867 irel->r_offset + 1, 2))
2868 goto error_return;
2869
2870 /* That will change things, so, we should relax again.
2871 Note that this is not required, and it may be slow. */
2872 *again = TRUE;
2873 }
2874
2875 /* Try to turn a 24 immediate, displacement or absolute address
2876 into a 8 immediate, displacement or absolute address. */
2877 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_24)
2878 {
2879 bfd_vma value = symval;
2880 value += irel->r_addend;
2881
2882 /* See if the value will fit in 8 bits. */
2883 if ((long) value < 0x7f && (long) value > -0x80)
2884 {
2885 unsigned char code;
2886
2887 /* AM33 insns which have 24 operands are 6 bytes long and
2888 will have 0xfd as the first byte. */
2889
2890 /* Get the first opcode. */
2891 code = bfd_get_8 (abfd, contents + irel->r_offset - 3);
2892
2893 if (code == 0xfd)
2894 {
2895 /* Get the second opcode. */
2896 code = bfd_get_8 (abfd, contents + irel->r_offset - 2);
2897
2898 /* We can not relax 0x6b, 0x7b, 0x8b, 0x9b as no 24bit
2899 equivalent instructions exists. */
2900 if (code != 0x6b && code != 0x7b
2901 && code != 0x8b && code != 0x9b
2902 && ((code & 0x0f) == 0x09 || (code & 0x0f) == 0x08
2903 || (code & 0x0f) == 0x0a || (code & 0x0f) == 0x0b
2904 || (code & 0x0f) == 0x0e))
2905 {
2906 /* Not safe if the high bit is on as relaxing may
2907 move the value out of high mem and thus not fit
2908 in a signed 8bit value. This is currently over
2909 conservative. */
2910 if ((value & 0x80) == 0)
2911 {
2912 /* Note that we've changed the relocation contents,
2913 etc. */
2914 elf_section_data (sec)->relocs = internal_relocs;
2915 elf_section_data (sec)->this_hdr.contents = contents;
2916 symtab_hdr->contents = (unsigned char *) isymbuf;
2917
2918 /* Fix the opcode. */
2919 bfd_put_8 (abfd, 0xfb, contents + irel->r_offset - 3);
2920 bfd_put_8 (abfd, code, contents + irel->r_offset - 2);
2921
2922 /* Fix the relocation's type. */
2923 irel->r_info =
2924 ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2925 R_MN10300_8);
2926
2927 /* Delete two bytes of data. */
2928 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2929 irel->r_offset + 1, 2))
2930 goto error_return;
2931
2932 /* That will change things, so, we should relax
2933 again. Note that this is not required, and it
2934 may be slow. */
2935 *again = TRUE;
2936 break;
2937 }
2938 }
2939 }
2940 }
2941 }
2942
2943 /* Try to turn a 32bit immediate, displacement or absolute address
2944 into a 16bit immediate, displacement or absolute address. */
2945 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_32
2946 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOT32
2947 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOTOFF32
2948 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOTPC32)
2949 {
2950 bfd_vma value = symval;
2951
2952 if (ELF32_R_TYPE (irel->r_info) != (int) R_MN10300_32)
2953 {
2954 asection * sgot;
2955
2956 sgot = bfd_get_section_by_name (elf_hash_table (link_info)
2957 ->dynobj, ".got");
2958
2959 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOT32)
2960 {
2961 value = sgot->output_offset;
2962
2963 if (h)
2964 value += h->root.got.offset;
2965 else
2966 value += (elf_local_got_offsets
2967 (abfd)[ELF32_R_SYM (irel->r_info)]);
2968 }
2969 else if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOTOFF32)
2970 value -= sgot->output_section->vma;
2971 else if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOTPC32)
2972 value = (sgot->output_section->vma
2973 - (sec->output_section->vma
2974 + sec->output_offset
2975 + irel->r_offset));
2976 else
2977 abort ();
2978 }
2979
2980 value += irel->r_addend;
2981
2982 /* See if the value will fit in 24 bits.
2983 We allow any 16bit match here. We prune those we can't
2984 handle below. */
2985 if ((long) value < 0x7fffff && (long) value > -0x800000)
2986 {
2987 unsigned char code;
2988
2989 /* AM33 insns which have 32bit operands are 7 bytes long and
2990 will have 0xfe as the first byte. */
2991
2992 /* Get the first opcode. */
2993 code = bfd_get_8 (abfd, contents + irel->r_offset - 3);
2994
2995 if (code == 0xfe)
2996 {
2997 /* Get the second opcode. */
2998 code = bfd_get_8 (abfd, contents + irel->r_offset - 2);
2999
3000 /* All the am33 32 -> 24 relaxing possibilities. */
3001 /* We can not relax 0x6b, 0x7b, 0x8b, 0x9b as no 24bit
3002 equivalent instructions exists. */
3003 if (code != 0x6b && code != 0x7b
3004 && code != 0x8b && code != 0x9b
3005 && (ELF32_R_TYPE (irel->r_info)
3006 != (int) R_MN10300_GOTPC32)
3007 && ((code & 0x0f) == 0x09 || (code & 0x0f) == 0x08
3008 || (code & 0x0f) == 0x0a || (code & 0x0f) == 0x0b
3009 || (code & 0x0f) == 0x0e))
3010 {
3011 /* Not safe if the high bit is on as relaxing may
3012 move the value out of high mem and thus not fit
3013 in a signed 16bit value. This is currently over
3014 conservative. */
3015 if ((value & 0x8000) == 0)
3016 {
3017 /* Note that we've changed the relocation contents,
3018 etc. */
3019 elf_section_data (sec)->relocs = internal_relocs;
3020 elf_section_data (sec)->this_hdr.contents = contents;
3021 symtab_hdr->contents = (unsigned char *) isymbuf;
3022
3023 /* Fix the opcode. */
3024 bfd_put_8 (abfd, 0xfd, contents + irel->r_offset - 3);
3025 bfd_put_8 (abfd, code, contents + irel->r_offset - 2);
3026
3027 /* Fix the relocation's type. */
3028 irel->r_info =
3029 ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3030 (ELF32_R_TYPE (irel->r_info)
3031 == (int) R_MN10300_GOTOFF32)
3032 ? R_MN10300_GOTOFF24
3033 : (ELF32_R_TYPE (irel->r_info)
3034 == (int) R_MN10300_GOT32)
3035 ? R_MN10300_GOT24 :
3036 R_MN10300_24);
3037
3038 /* Delete one byte of data. */
3039 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3040 irel->r_offset + 3, 1))
3041 goto error_return;
3042
3043 /* That will change things, so, we should relax
3044 again. Note that this is not required, and it
3045 may be slow. */
3046 *again = TRUE;
3047 break;
3048 }
3049 }
3050 }
3051 }
3052
3053 /* See if the value will fit in 16 bits.
3054 We allow any 16bit match here. We prune those we can't
3055 handle below. */
3056 if ((long) value < 0x7fff && (long) value > -0x8000)
3057 {
3058 unsigned char code;
3059
3060 /* Most insns which have 32bit operands are 6 bytes long;
3061 exceptions are pcrel insns and bit insns.
3062
3063 We handle pcrel insns above. We don't bother trying
3064 to handle the bit insns here.
3065
3066 The first byte of the remaining insns will be 0xfc. */
3067
3068 /* Get the first opcode. */
3069 code = bfd_get_8 (abfd, contents + irel->r_offset - 2);
3070
3071 if (code != 0xfc)
3072 continue;
3073
3074 /* Get the second opcode. */
3075 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
3076
3077 if ((code & 0xf0) < 0x80)
3078 switch (code & 0xf0)
3079 {
3080 /* mov (d32,am),dn -> mov (d32,am),dn
3081 mov dm,(d32,am) -> mov dn,(d32,am)
3082 mov (d32,am),an -> mov (d32,am),an
3083 mov dm,(d32,am) -> mov dn,(d32,am)
3084 movbu (d32,am),dn -> movbu (d32,am),dn
3085 movbu dm,(d32,am) -> movbu dn,(d32,am)
3086 movhu (d32,am),dn -> movhu (d32,am),dn
3087 movhu dm,(d32,am) -> movhu dn,(d32,am) */
3088 case 0x00:
3089 case 0x10:
3090 case 0x20:
3091 case 0x30:
3092 case 0x40:
3093 case 0x50:
3094 case 0x60:
3095 case 0x70:
3096 /* Not safe if the high bit is on as relaxing may
3097 move the value out of high mem and thus not fit
3098 in a signed 16bit value. */
3099 if (code == 0xcc
3100 && (value & 0x8000))
3101 continue;
3102
3103 /* Note that we've changed the relocation contents, etc. */
3104 elf_section_data (sec)->relocs = internal_relocs;
3105 elf_section_data (sec)->this_hdr.contents = contents;
3106 symtab_hdr->contents = (unsigned char *) isymbuf;
3107
3108 /* Fix the opcode. */
3109 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
3110 bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
3111
3112 /* Fix the relocation's type. */
3113 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3114 (ELF32_R_TYPE (irel->r_info)
3115 == (int) R_MN10300_GOTOFF32)
3116 ? R_MN10300_GOTOFF16
3117 : (ELF32_R_TYPE (irel->r_info)
3118 == (int) R_MN10300_GOT32)
3119 ? R_MN10300_GOT16
3120 : (ELF32_R_TYPE (irel->r_info)
3121 == (int) R_MN10300_GOTPC32)
3122 ? R_MN10300_GOTPC16 :
3123 R_MN10300_16);
3124
3125 /* Delete two bytes of data. */
3126 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3127 irel->r_offset + 2, 2))
3128 goto error_return;
3129
3130 /* That will change things, so, we should relax again.
3131 Note that this is not required, and it may be slow. */
3132 *again = TRUE;
3133 break;
3134 }
3135 else if ((code & 0xf0) == 0x80
3136 || (code & 0xf0) == 0x90)
3137 switch (code & 0xf3)
3138 {
3139 /* mov dn,(abs32) -> mov dn,(abs16)
3140 movbu dn,(abs32) -> movbu dn,(abs16)
3141 movhu dn,(abs32) -> movhu dn,(abs16) */
3142 case 0x81:
3143 case 0x82:
3144 case 0x83:
3145 /* Note that we've changed the relocation contents, etc. */
3146 elf_section_data (sec)->relocs = internal_relocs;
3147 elf_section_data (sec)->this_hdr.contents = contents;
3148 symtab_hdr->contents = (unsigned char *) isymbuf;
3149
3150 if ((code & 0xf3) == 0x81)
3151 code = 0x01 + (code & 0x0c);
3152 else if ((code & 0xf3) == 0x82)
3153 code = 0x02 + (code & 0x0c);
3154 else if ((code & 0xf3) == 0x83)
3155 code = 0x03 + (code & 0x0c);
3156 else
3157 abort ();
3158
3159 /* Fix the opcode. */
3160 bfd_put_8 (abfd, code, contents + irel->r_offset - 2);
3161
3162 /* Fix the relocation's type. */
3163 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3164 (ELF32_R_TYPE (irel->r_info)
3165 == (int) R_MN10300_GOTOFF32)
3166 ? R_MN10300_GOTOFF16
3167 : (ELF32_R_TYPE (irel->r_info)
3168 == (int) R_MN10300_GOT32)
3169 ? R_MN10300_GOT16
3170 : (ELF32_R_TYPE (irel->r_info)
3171 == (int) R_MN10300_GOTPC32)
3172 ? R_MN10300_GOTPC16 :
3173 R_MN10300_16);
3174
3175 /* The opcode got shorter too, so we have to fix the
3176 addend and offset too! */
3177 irel->r_offset -= 1;
3178
3179 /* Delete three bytes of data. */
3180 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3181 irel->r_offset + 1, 3))
3182 goto error_return;
3183
3184 /* That will change things, so, we should relax again.
3185 Note that this is not required, and it may be slow. */
3186 *again = TRUE;
3187 break;
3188
3189 /* mov am,(abs32) -> mov am,(abs16)
3190 mov am,(d32,sp) -> mov am,(d16,sp)
3191 mov dm,(d32,sp) -> mov dm,(d32,sp)
3192 movbu dm,(d32,sp) -> movbu dm,(d32,sp)
3193 movhu dm,(d32,sp) -> movhu dm,(d32,sp) */
3194 case 0x80:
3195 case 0x90:
3196 case 0x91:
3197 case 0x92:
3198 case 0x93:
3199 /* sp-based offsets are zero-extended. */
3200 if (code >= 0x90 && code <= 0x93
3201 && (long)value < 0)
3202 continue;
3203
3204 /* Note that we've changed the relocation contents, etc. */
3205 elf_section_data (sec)->relocs = internal_relocs;
3206 elf_section_data (sec)->this_hdr.contents = contents;
3207 symtab_hdr->contents = (unsigned char *) isymbuf;
3208
3209 /* Fix the opcode. */
3210 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
3211 bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
3212
3213 /* Fix the relocation's type. */
3214 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3215 (ELF32_R_TYPE (irel->r_info)
3216 == (int) R_MN10300_GOTOFF32)
3217 ? R_MN10300_GOTOFF16
3218 : (ELF32_R_TYPE (irel->r_info)
3219 == (int) R_MN10300_GOT32)
3220 ? R_MN10300_GOT16
3221 : (ELF32_R_TYPE (irel->r_info)
3222 == (int) R_MN10300_GOTPC32)
3223 ? R_MN10300_GOTPC16 :
3224 R_MN10300_16);
3225
3226 /* Delete two bytes of data. */
3227 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3228 irel->r_offset + 2, 2))
3229 goto error_return;
3230
3231 /* That will change things, so, we should relax again.
3232 Note that this is not required, and it may be slow. */
3233 *again = TRUE;
3234 break;
3235 }
3236 else if ((code & 0xf0) < 0xf0)
3237 switch (code & 0xfc)
3238 {
3239 /* mov imm32,dn -> mov imm16,dn
3240 mov imm32,an -> mov imm16,an
3241 mov (abs32),dn -> mov (abs16),dn
3242 movbu (abs32),dn -> movbu (abs16),dn
3243 movhu (abs32),dn -> movhu (abs16),dn */
3244 case 0xcc:
3245 case 0xdc:
3246 case 0xa4:
3247 case 0xa8:
3248 case 0xac:
3249 /* Not safe if the high bit is on as relaxing may
3250 move the value out of high mem and thus not fit
3251 in a signed 16bit value. */
3252 if (code == 0xcc
3253 && (value & 0x8000))
3254 continue;
3255
3256 /* mov imm16, an zero-extends the immediate. */
3257 if (code == 0xdc
3258 && (long)value < 0)
3259 continue;
3260
3261 /* Note that we've changed the relocation contents, etc. */
3262 elf_section_data (sec)->relocs = internal_relocs;
3263 elf_section_data (sec)->this_hdr.contents = contents;
3264 symtab_hdr->contents = (unsigned char *) isymbuf;
3265
3266 if ((code & 0xfc) == 0xcc)
3267 code = 0x2c + (code & 0x03);
3268 else if ((code & 0xfc) == 0xdc)
3269 code = 0x24 + (code & 0x03);
3270 else if ((code & 0xfc) == 0xa4)
3271 code = 0x30 + (code & 0x03);
3272 else if ((code & 0xfc) == 0xa8)
3273 code = 0x34 + (code & 0x03);
3274 else if ((code & 0xfc) == 0xac)
3275 code = 0x38 + (code & 0x03);
3276 else
3277 abort ();
3278
3279 /* Fix the opcode. */
3280 bfd_put_8 (abfd, code, contents + irel->r_offset - 2);
3281
3282 /* Fix the relocation's type. */
3283 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3284 (ELF32_R_TYPE (irel->r_info)
3285 == (int) R_MN10300_GOTOFF32)
3286 ? R_MN10300_GOTOFF16
3287 : (ELF32_R_TYPE (irel->r_info)
3288 == (int) R_MN10300_GOT32)
3289 ? R_MN10300_GOT16
3290 : (ELF32_R_TYPE (irel->r_info)
3291 == (int) R_MN10300_GOTPC32)
3292 ? R_MN10300_GOTPC16 :
3293 R_MN10300_16);
3294
3295 /* The opcode got shorter too, so we have to fix the
3296 addend and offset too! */
3297 irel->r_offset -= 1;
3298
3299 /* Delete three bytes of data. */
3300 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3301 irel->r_offset + 1, 3))
3302 goto error_return;
3303
3304 /* That will change things, so, we should relax again.
3305 Note that this is not required, and it may be slow. */
3306 *again = TRUE;
3307 break;
3308
3309 /* mov (abs32),an -> mov (abs16),an
3310 mov (d32,sp),an -> mov (d16,sp),an
3311 mov (d32,sp),dn -> mov (d16,sp),dn
3312 movbu (d32,sp),dn -> movbu (d16,sp),dn
3313 movhu (d32,sp),dn -> movhu (d16,sp),dn
3314 add imm32,dn -> add imm16,dn
3315 cmp imm32,dn -> cmp imm16,dn
3316 add imm32,an -> add imm16,an
3317 cmp imm32,an -> cmp imm16,an
3318 and imm32,dn -> and imm16,dn
3319 or imm32,dn -> or imm16,dn
3320 xor imm32,dn -> xor imm16,dn
3321 btst imm32,dn -> btst imm16,dn */
3322
3323 case 0xa0:
3324 case 0xb0:
3325 case 0xb1:
3326 case 0xb2:
3327 case 0xb3:
3328 case 0xc0:
3329 case 0xc8:
3330
3331 case 0xd0:
3332 case 0xd8:
3333 case 0xe0:
3334 case 0xe1:
3335 case 0xe2:
3336 case 0xe3:
3337 /* cmp imm16, an zero-extends the immediate. */
3338 if (code == 0xdc
3339 && (long)value < 0)
3340 continue;
3341
3342 /* So do sp-based offsets. */
3343 if (code >= 0xb0 && code <= 0xb3
3344 && (long)value < 0)
3345 continue;
3346
3347 /* Note that we've changed the relocation contents, etc. */
3348 elf_section_data (sec)->relocs = internal_relocs;
3349 elf_section_data (sec)->this_hdr.contents = contents;
3350 symtab_hdr->contents = (unsigned char *) isymbuf;
3351
3352 /* Fix the opcode. */
3353 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
3354 bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
3355
3356 /* Fix the relocation's type. */
3357 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3358 (ELF32_R_TYPE (irel->r_info)
3359 == (int) R_MN10300_GOTOFF32)
3360 ? R_MN10300_GOTOFF16
3361 : (ELF32_R_TYPE (irel->r_info)
3362 == (int) R_MN10300_GOT32)
3363 ? R_MN10300_GOT16
3364 : (ELF32_R_TYPE (irel->r_info)
3365 == (int) R_MN10300_GOTPC32)
3366 ? R_MN10300_GOTPC16 :
3367 R_MN10300_16);
3368
3369 /* Delete two bytes of data. */
3370 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3371 irel->r_offset + 2, 2))
3372 goto error_return;
3373
3374 /* That will change things, so, we should relax again.
3375 Note that this is not required, and it may be slow. */
3376 *again = TRUE;
3377 break;
3378 }
3379 else if (code == 0xfe)
3380 {
3381 /* add imm32,sp -> add imm16,sp */
3382
3383 /* Note that we've changed the relocation contents, etc. */
3384 elf_section_data (sec)->relocs = internal_relocs;
3385 elf_section_data (sec)->this_hdr.contents = contents;
3386 symtab_hdr->contents = (unsigned char *) isymbuf;
3387
3388 /* Fix the opcode. */
3389 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
3390 bfd_put_8 (abfd, 0xfe, contents + irel->r_offset - 1);
3391
3392 /* Fix the relocation's type. */
3393 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3394 (ELF32_R_TYPE (irel->r_info)
3395 == (int) R_MN10300_GOT32)
3396 ? R_MN10300_GOT16
3397 : (ELF32_R_TYPE (irel->r_info)
3398 == (int) R_MN10300_GOTOFF32)
3399 ? R_MN10300_GOTOFF16
3400 : (ELF32_R_TYPE (irel->r_info)
3401 == (int) R_MN10300_GOTPC32)
3402 ? R_MN10300_GOTPC16 :
3403 R_MN10300_16);
3404
3405 /* Delete two bytes of data. */
3406 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3407 irel->r_offset + 2, 2))
3408 goto error_return;
3409
3410 /* That will change things, so, we should relax again.
3411 Note that this is not required, and it may be slow. */
3412 *again = TRUE;
3413 break;
3414 }
3415 }
3416 }
3417 }
3418
3419 if (isymbuf != NULL
3420 && symtab_hdr->contents != (unsigned char *) isymbuf)
3421 {
3422 if (! link_info->keep_memory)
3423 free (isymbuf);
3424 else
3425 {
3426 /* Cache the symbols for elf_link_input_bfd. */
3427 symtab_hdr->contents = (unsigned char *) isymbuf;
3428 }
3429 }
3430
3431 if (contents != NULL
3432 && elf_section_data (sec)->this_hdr.contents != contents)
3433 {
3434 if (! link_info->keep_memory)
3435 free (contents);
3436 else
3437 {
3438 /* Cache the section contents for elf_link_input_bfd. */
3439 elf_section_data (sec)->this_hdr.contents = contents;
3440 }
3441 }
3442
3443 if (internal_relocs != NULL
3444 && elf_section_data (sec)->relocs != internal_relocs)
3445 free (internal_relocs);
3446
3447 return TRUE;
3448
3449 error_return:
3450 if (isymbuf != NULL
3451 && symtab_hdr->contents != (unsigned char *) isymbuf)
3452 free (isymbuf);
3453 if (contents != NULL
3454 && elf_section_data (section)->this_hdr.contents != contents)
3455 free (contents);
3456 if (internal_relocs != NULL
3457 && elf_section_data (section)->relocs != internal_relocs)
3458 free (internal_relocs);
3459
3460 return FALSE;
3461 }
3462
3463 /* Compute the stack size and movm arguments for the function
3464 referred to by HASH at address ADDR in section with
3465 contents CONTENTS, store the information in the hash table. */
3466 static void
compute_function_info(abfd,hash,addr,contents)3467 compute_function_info (abfd, hash, addr, contents)
3468 bfd *abfd;
3469 struct elf32_mn10300_link_hash_entry *hash;
3470 bfd_vma addr;
3471 unsigned char *contents;
3472 {
3473 unsigned char byte1, byte2;
3474 /* We only care about a very small subset of the possible prologue
3475 sequences here. Basically we look for:
3476
3477 movm [d2,d3,a2,a3],sp (optional)
3478 add <size>,sp (optional, and only for sizes which fit in an unsigned
3479 8 bit number)
3480
3481 If we find anything else, we quit. */
3482
3483 /* Look for movm [regs],sp */
3484 byte1 = bfd_get_8 (abfd, contents + addr);
3485 byte2 = bfd_get_8 (abfd, contents + addr + 1);
3486
3487 if (byte1 == 0xcf)
3488 {
3489 hash->movm_args = byte2;
3490 addr += 2;
3491 byte1 = bfd_get_8 (abfd, contents + addr);
3492 byte2 = bfd_get_8 (abfd, contents + addr + 1);
3493 }
3494
3495 /* Now figure out how much stack space will be allocated by the movm
3496 instruction. We need this kept separate from the function's normal
3497 stack space. */
3498 if (hash->movm_args)
3499 {
3500 /* Space for d2. */
3501 if (hash->movm_args & 0x80)
3502 hash->movm_stack_size += 4;
3503
3504 /* Space for d3. */
3505 if (hash->movm_args & 0x40)
3506 hash->movm_stack_size += 4;
3507
3508 /* Space for a2. */
3509 if (hash->movm_args & 0x20)
3510 hash->movm_stack_size += 4;
3511
3512 /* Space for a3. */
3513 if (hash->movm_args & 0x10)
3514 hash->movm_stack_size += 4;
3515
3516 /* "other" space. d0, d1, a0, a1, mdr, lir, lar, 4 byte pad. */
3517 if (hash->movm_args & 0x08)
3518 hash->movm_stack_size += 8 * 4;
3519
3520 if (bfd_get_mach (abfd) == bfd_mach_am33
3521 || bfd_get_mach (abfd) == bfd_mach_am33_2)
3522 {
3523 /* "exother" space. e0, e1, mdrq, mcrh, mcrl, mcvf */
3524 if (hash->movm_args & 0x1)
3525 hash->movm_stack_size += 6 * 4;
3526
3527 /* exreg1 space. e4, e5, e6, e7 */
3528 if (hash->movm_args & 0x2)
3529 hash->movm_stack_size += 4 * 4;
3530
3531 /* exreg0 space. e2, e3 */
3532 if (hash->movm_args & 0x4)
3533 hash->movm_stack_size += 2 * 4;
3534 }
3535 }
3536
3537 /* Now look for the two stack adjustment variants. */
3538 if (byte1 == 0xf8 && byte2 == 0xfe)
3539 {
3540 int temp = bfd_get_8 (abfd, contents + addr + 2);
3541 temp = ((temp & 0xff) ^ (~0x7f)) + 0x80;
3542
3543 hash->stack_size = -temp;
3544 }
3545 else if (byte1 == 0xfa && byte2 == 0xfe)
3546 {
3547 int temp = bfd_get_16 (abfd, contents + addr + 2);
3548 temp = ((temp & 0xffff) ^ (~0x7fff)) + 0x8000;
3549 temp = -temp;
3550
3551 if (temp < 255)
3552 hash->stack_size = temp;
3553 }
3554
3555 /* If the total stack to be allocated by the call instruction is more
3556 than 255 bytes, then we can't remove the stack adjustment by using
3557 "call" (we might still be able to remove the "movm" instruction. */
3558 if (hash->stack_size + hash->movm_stack_size > 255)
3559 hash->stack_size = 0;
3560
3561 return;
3562 }
3563
3564 /* Delete some bytes from a section while relaxing. */
3565
3566 static bfd_boolean
mn10300_elf_relax_delete_bytes(abfd,sec,addr,count)3567 mn10300_elf_relax_delete_bytes (abfd, sec, addr, count)
3568 bfd *abfd;
3569 asection *sec;
3570 bfd_vma addr;
3571 int count;
3572 {
3573 Elf_Internal_Shdr *symtab_hdr;
3574 unsigned int sec_shndx;
3575 bfd_byte *contents;
3576 Elf_Internal_Rela *irel, *irelend;
3577 Elf_Internal_Rela *irelalign;
3578 bfd_vma toaddr;
3579 Elf_Internal_Sym *isym, *isymend;
3580 struct elf_link_hash_entry **sym_hashes;
3581 struct elf_link_hash_entry **end_hashes;
3582 unsigned int symcount;
3583
3584 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
3585
3586 contents = elf_section_data (sec)->this_hdr.contents;
3587
3588 /* The deletion must stop at the next ALIGN reloc for an aligment
3589 power larger than the number of bytes we are deleting. */
3590
3591 irelalign = NULL;
3592 toaddr = sec->_cooked_size;
3593
3594 irel = elf_section_data (sec)->relocs;
3595 irelend = irel + sec->reloc_count;
3596
3597 /* Actually delete the bytes. */
3598 memmove (contents + addr, contents + addr + count,
3599 (size_t) (toaddr - addr - count));
3600 sec->_cooked_size -= count;
3601
3602 /* Adjust all the relocs. */
3603 for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
3604 {
3605 /* Get the new reloc address. */
3606 if ((irel->r_offset > addr
3607 && irel->r_offset < toaddr))
3608 irel->r_offset -= count;
3609 }
3610
3611 /* Adjust the local symbols defined in this section. */
3612 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3613 isym = (Elf_Internal_Sym *) symtab_hdr->contents;
3614 for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
3615 {
3616 if (isym->st_shndx == sec_shndx
3617 && isym->st_value > addr
3618 && isym->st_value < toaddr)
3619 isym->st_value -= count;
3620 }
3621
3622 /* Now adjust the global symbols defined in this section. */
3623 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
3624 - symtab_hdr->sh_info);
3625 sym_hashes = elf_sym_hashes (abfd);
3626 end_hashes = sym_hashes + symcount;
3627 for (; sym_hashes < end_hashes; sym_hashes++)
3628 {
3629 struct elf_link_hash_entry *sym_hash = *sym_hashes;
3630 if ((sym_hash->root.type == bfd_link_hash_defined
3631 || sym_hash->root.type == bfd_link_hash_defweak)
3632 && sym_hash->root.u.def.section == sec
3633 && sym_hash->root.u.def.value > addr
3634 && sym_hash->root.u.def.value < toaddr)
3635 {
3636 sym_hash->root.u.def.value -= count;
3637 }
3638 }
3639
3640 return TRUE;
3641 }
3642
3643 /* Return TRUE if a symbol exists at the given address, else return
3644 FALSE. */
3645 static bfd_boolean
mn10300_elf_symbol_address_p(abfd,sec,isym,addr)3646 mn10300_elf_symbol_address_p (abfd, sec, isym, addr)
3647 bfd *abfd;
3648 asection *sec;
3649 Elf_Internal_Sym *isym;
3650 bfd_vma addr;
3651 {
3652 Elf_Internal_Shdr *symtab_hdr;
3653 unsigned int sec_shndx;
3654 Elf_Internal_Sym *isymend;
3655 struct elf_link_hash_entry **sym_hashes;
3656 struct elf_link_hash_entry **end_hashes;
3657 unsigned int symcount;
3658
3659 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
3660
3661 /* Examine all the symbols. */
3662 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3663 for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
3664 {
3665 if (isym->st_shndx == sec_shndx
3666 && isym->st_value == addr)
3667 return TRUE;
3668 }
3669
3670 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
3671 - symtab_hdr->sh_info);
3672 sym_hashes = elf_sym_hashes (abfd);
3673 end_hashes = sym_hashes + symcount;
3674 for (; sym_hashes < end_hashes; sym_hashes++)
3675 {
3676 struct elf_link_hash_entry *sym_hash = *sym_hashes;
3677 if ((sym_hash->root.type == bfd_link_hash_defined
3678 || sym_hash->root.type == bfd_link_hash_defweak)
3679 && sym_hash->root.u.def.section == sec
3680 && sym_hash->root.u.def.value == addr)
3681 return TRUE;
3682 }
3683
3684 return FALSE;
3685 }
3686
3687 /* This is a version of bfd_generic_get_relocated_section_contents
3688 which uses mn10300_elf_relocate_section. */
3689
3690 static bfd_byte *
mn10300_elf_get_relocated_section_contents(output_bfd,link_info,link_order,data,relocatable,symbols)3691 mn10300_elf_get_relocated_section_contents (output_bfd, link_info, link_order,
3692 data, relocatable, symbols)
3693 bfd *output_bfd;
3694 struct bfd_link_info *link_info;
3695 struct bfd_link_order *link_order;
3696 bfd_byte *data;
3697 bfd_boolean relocatable;
3698 asymbol **symbols;
3699 {
3700 Elf_Internal_Shdr *symtab_hdr;
3701 asection *input_section = link_order->u.indirect.section;
3702 bfd *input_bfd = input_section->owner;
3703 asection **sections = NULL;
3704 Elf_Internal_Rela *internal_relocs = NULL;
3705 Elf_Internal_Sym *isymbuf = NULL;
3706
3707 /* We only need to handle the case of relaxing, or of having a
3708 particular set of section contents, specially. */
3709 if (relocatable
3710 || elf_section_data (input_section)->this_hdr.contents == NULL)
3711 return bfd_generic_get_relocated_section_contents (output_bfd, link_info,
3712 link_order, data,
3713 relocatable,
3714 symbols);
3715
3716 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3717
3718 memcpy (data, elf_section_data (input_section)->this_hdr.contents,
3719 (size_t) input_section->_raw_size);
3720
3721 if ((input_section->flags & SEC_RELOC) != 0
3722 && input_section->reloc_count > 0)
3723 {
3724 asection **secpp;
3725 Elf_Internal_Sym *isym, *isymend;
3726 bfd_size_type amt;
3727
3728 internal_relocs = (_bfd_elf_link_read_relocs
3729 (input_bfd, input_section, (PTR) NULL,
3730 (Elf_Internal_Rela *) NULL, FALSE));
3731 if (internal_relocs == NULL)
3732 goto error_return;
3733
3734 if (symtab_hdr->sh_info != 0)
3735 {
3736 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
3737 if (isymbuf == NULL)
3738 isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
3739 symtab_hdr->sh_info, 0,
3740 NULL, NULL, NULL);
3741 if (isymbuf == NULL)
3742 goto error_return;
3743 }
3744
3745 amt = symtab_hdr->sh_info;
3746 amt *= sizeof (asection *);
3747 sections = (asection **) bfd_malloc (amt);
3748 if (sections == NULL && amt != 0)
3749 goto error_return;
3750
3751 isymend = isymbuf + symtab_hdr->sh_info;
3752 for (isym = isymbuf, secpp = sections; isym < isymend; ++isym, ++secpp)
3753 {
3754 asection *isec;
3755
3756 if (isym->st_shndx == SHN_UNDEF)
3757 isec = bfd_und_section_ptr;
3758 else if (isym->st_shndx == SHN_ABS)
3759 isec = bfd_abs_section_ptr;
3760 else if (isym->st_shndx == SHN_COMMON)
3761 isec = bfd_com_section_ptr;
3762 else
3763 isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx);
3764
3765 *secpp = isec;
3766 }
3767
3768 if (! mn10300_elf_relocate_section (output_bfd, link_info, input_bfd,
3769 input_section, data, internal_relocs,
3770 isymbuf, sections))
3771 goto error_return;
3772
3773 if (sections != NULL)
3774 free (sections);
3775 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
3776 free (isymbuf);
3777 if (internal_relocs != elf_section_data (input_section)->relocs)
3778 free (internal_relocs);
3779 }
3780
3781 return data;
3782
3783 error_return:
3784 if (sections != NULL)
3785 free (sections);
3786 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
3787 free (isymbuf);
3788 if (internal_relocs != NULL
3789 && internal_relocs != elf_section_data (input_section)->relocs)
3790 free (internal_relocs);
3791 return NULL;
3792 }
3793
3794 /* Assorted hash table functions. */
3795
3796 /* Initialize an entry in the link hash table. */
3797
3798 /* Create an entry in an MN10300 ELF linker hash table. */
3799
3800 static struct bfd_hash_entry *
elf32_mn10300_link_hash_newfunc(entry,table,string)3801 elf32_mn10300_link_hash_newfunc (entry, table, string)
3802 struct bfd_hash_entry *entry;
3803 struct bfd_hash_table *table;
3804 const char *string;
3805 {
3806 struct elf32_mn10300_link_hash_entry *ret =
3807 (struct elf32_mn10300_link_hash_entry *) entry;
3808
3809 /* Allocate the structure if it has not already been allocated by a
3810 subclass. */
3811 if (ret == (struct elf32_mn10300_link_hash_entry *) NULL)
3812 ret = ((struct elf32_mn10300_link_hash_entry *)
3813 bfd_hash_allocate (table,
3814 sizeof (struct elf32_mn10300_link_hash_entry)));
3815 if (ret == (struct elf32_mn10300_link_hash_entry *) NULL)
3816 return (struct bfd_hash_entry *) ret;
3817
3818 /* Call the allocation method of the superclass. */
3819 ret = ((struct elf32_mn10300_link_hash_entry *)
3820 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
3821 table, string));
3822 if (ret != (struct elf32_mn10300_link_hash_entry *) NULL)
3823 {
3824 ret->direct_calls = 0;
3825 ret->stack_size = 0;
3826 ret->movm_args = 0;
3827 ret->movm_stack_size = 0;
3828 ret->pcrel_relocs_copied = NULL;
3829 ret->flags = 0;
3830 }
3831
3832 return (struct bfd_hash_entry *) ret;
3833 }
3834
3835 /* Create an mn10300 ELF linker hash table. */
3836
3837 static struct bfd_link_hash_table *
elf32_mn10300_link_hash_table_create(abfd)3838 elf32_mn10300_link_hash_table_create (abfd)
3839 bfd *abfd;
3840 {
3841 struct elf32_mn10300_link_hash_table *ret;
3842 bfd_size_type amt = sizeof (struct elf32_mn10300_link_hash_table);
3843
3844 ret = (struct elf32_mn10300_link_hash_table *) bfd_malloc (amt);
3845 if (ret == (struct elf32_mn10300_link_hash_table *) NULL)
3846 return NULL;
3847
3848 if (! _bfd_elf_link_hash_table_init (&ret->root, abfd,
3849 elf32_mn10300_link_hash_newfunc))
3850 {
3851 free (ret);
3852 return NULL;
3853 }
3854
3855 ret->flags = 0;
3856 amt = sizeof (struct elf_link_hash_table);
3857 ret->static_hash_table
3858 = (struct elf32_mn10300_link_hash_table *) bfd_malloc (amt);
3859 if (ret->static_hash_table == NULL)
3860 {
3861 free (ret);
3862 return NULL;
3863 }
3864
3865 if (! _bfd_elf_link_hash_table_init (&ret->static_hash_table->root, abfd,
3866 elf32_mn10300_link_hash_newfunc))
3867 {
3868 free (ret->static_hash_table);
3869 free (ret);
3870 return NULL;
3871 }
3872 return &ret->root.root;
3873 }
3874
3875 /* Free an mn10300 ELF linker hash table. */
3876
3877 static void
elf32_mn10300_link_hash_table_free(hash)3878 elf32_mn10300_link_hash_table_free (hash)
3879 struct bfd_link_hash_table *hash;
3880 {
3881 struct elf32_mn10300_link_hash_table *ret
3882 = (struct elf32_mn10300_link_hash_table *) hash;
3883
3884 _bfd_generic_link_hash_table_free
3885 ((struct bfd_link_hash_table *) ret->static_hash_table);
3886 _bfd_generic_link_hash_table_free
3887 ((struct bfd_link_hash_table *) ret);
3888 }
3889
3890 static unsigned long
elf_mn10300_mach(flags)3891 elf_mn10300_mach (flags)
3892 flagword flags;
3893 {
3894 switch (flags & EF_MN10300_MACH)
3895 {
3896 case E_MN10300_MACH_MN10300:
3897 default:
3898 return bfd_mach_mn10300;
3899
3900 case E_MN10300_MACH_AM33:
3901 return bfd_mach_am33;
3902
3903 case E_MN10300_MACH_AM33_2:
3904 return bfd_mach_am33_2;
3905 }
3906 }
3907
3908 /* The final processing done just before writing out a MN10300 ELF object
3909 file. This gets the MN10300 architecture right based on the machine
3910 number. */
3911
3912 void
_bfd_mn10300_elf_final_write_processing(abfd,linker)3913 _bfd_mn10300_elf_final_write_processing (abfd, linker)
3914 bfd *abfd;
3915 bfd_boolean linker ATTRIBUTE_UNUSED;
3916 {
3917 unsigned long val;
3918
3919 switch (bfd_get_mach (abfd))
3920 {
3921 default:
3922 case bfd_mach_mn10300:
3923 val = E_MN10300_MACH_MN10300;
3924 break;
3925
3926 case bfd_mach_am33:
3927 val = E_MN10300_MACH_AM33;
3928 break;
3929
3930 case bfd_mach_am33_2:
3931 val = E_MN10300_MACH_AM33_2;
3932 break;
3933 }
3934
3935 elf_elfheader (abfd)->e_flags &= ~ (EF_MN10300_MACH);
3936 elf_elfheader (abfd)->e_flags |= val;
3937 }
3938
3939 bfd_boolean
_bfd_mn10300_elf_object_p(abfd)3940 _bfd_mn10300_elf_object_p (abfd)
3941 bfd *abfd;
3942 {
3943 bfd_default_set_arch_mach (abfd, bfd_arch_mn10300,
3944 elf_mn10300_mach (elf_elfheader (abfd)->e_flags));
3945 return TRUE;
3946 }
3947
3948 /* Merge backend specific data from an object file to the output
3949 object file when linking. */
3950
3951 bfd_boolean
_bfd_mn10300_elf_merge_private_bfd_data(ibfd,obfd)3952 _bfd_mn10300_elf_merge_private_bfd_data (ibfd, obfd)
3953 bfd *ibfd;
3954 bfd *obfd;
3955 {
3956 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3957 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3958 return TRUE;
3959
3960 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
3961 && bfd_get_mach (obfd) < bfd_get_mach (ibfd))
3962 {
3963 if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd),
3964 bfd_get_mach (ibfd)))
3965 return FALSE;
3966 }
3967
3968 return TRUE;
3969 }
3970
3971 #define PLT0_ENTRY_SIZE 15
3972 #define PLT_ENTRY_SIZE 20
3973 #define PIC_PLT_ENTRY_SIZE 24
3974
3975 static const bfd_byte elf_mn10300_plt0_entry[PLT0_ENTRY_SIZE] =
3976 {
3977 0xfc, 0xa0, 0, 0, 0, 0, /* mov (.got+8),a0 */
3978 0xfe, 0xe, 0x10, 0, 0, 0, 0, /* mov (.got+4),r1 */
3979 0xf0, 0xf4, /* jmp (a0) */
3980 };
3981
3982 static const bfd_byte elf_mn10300_plt_entry[PLT_ENTRY_SIZE] =
3983 {
3984 0xfc, 0xa0, 0, 0, 0, 0, /* mov (nameN@GOT + .got),a0 */
3985 0xf0, 0xf4, /* jmp (a0) */
3986 0xfe, 8, 0, 0, 0, 0, 0, /* mov reloc-table-address,r0 */
3987 0xdc, 0, 0, 0, 0, /* jmp .plt0 */
3988 };
3989
3990 static const bfd_byte elf_mn10300_pic_plt_entry[PIC_PLT_ENTRY_SIZE] =
3991 {
3992 0xfc, 0x22, 0, 0, 0, 0, /* mov (nameN@GOT,a2),a0 */
3993 0xf0, 0xf4, /* jmp (a0) */
3994 0xfe, 8, 0, 0, 0, 0, 0, /* mov reloc-table-address,r0 */
3995 0xf8, 0x22, 8, /* mov (8,a2),a0 */
3996 0xfb, 0xa, 0x1a, 4, /* mov (4,a2),r1 */
3997 0xf0, 0xf4, /* jmp (a0) */
3998 };
3999
4000 /* Return size of the first PLT entry. */
4001 #define elf_mn10300_sizeof_plt0(info) \
4002 (info->shared ? PIC_PLT_ENTRY_SIZE : PLT0_ENTRY_SIZE)
4003
4004 /* Return size of a PLT entry. */
4005 #define elf_mn10300_sizeof_plt(info) \
4006 (info->shared ? PIC_PLT_ENTRY_SIZE : PLT_ENTRY_SIZE)
4007
4008 /* Return offset of the PLT0 address in an absolute PLT entry. */
4009 #define elf_mn10300_plt_plt0_offset(info) 16
4010
4011 /* Return offset of the linker in PLT0 entry. */
4012 #define elf_mn10300_plt0_linker_offset(info) 2
4013
4014 /* Return offset of the GOT id in PLT0 entry. */
4015 #define elf_mn10300_plt0_gotid_offset(info) 9
4016
4017 /* Return offset of the temporary in PLT entry */
4018 #define elf_mn10300_plt_temp_offset(info) 8
4019
4020 /* Return offset of the symbol in PLT entry. */
4021 #define elf_mn10300_plt_symbol_offset(info) 2
4022
4023 /* Return offset of the relocation in PLT entry. */
4024 #define elf_mn10300_plt_reloc_offset(info) 11
4025
4026 /* The name of the dynamic interpreter. This is put in the .interp
4027 section. */
4028
4029 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
4030
4031 /* Create dynamic sections when linking against a dynamic object. */
4032
4033 static bfd_boolean
_bfd_mn10300_elf_create_dynamic_sections(abfd,info)4034 _bfd_mn10300_elf_create_dynamic_sections (abfd, info)
4035 bfd *abfd;
4036 struct bfd_link_info *info;
4037 {
4038 flagword flags;
4039 asection * s;
4040 const struct elf_backend_data * bed = get_elf_backend_data (abfd);
4041 int ptralign = 0;
4042
4043 switch (bed->s->arch_size)
4044 {
4045 case 32:
4046 ptralign = 2;
4047 break;
4048
4049 case 64:
4050 ptralign = 3;
4051 break;
4052
4053 default:
4054 bfd_set_error (bfd_error_bad_value);
4055 return FALSE;
4056 }
4057
4058 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
4059 .rel[a].bss sections. */
4060
4061 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
4062 | SEC_LINKER_CREATED);
4063
4064 s = bfd_make_section (abfd,
4065 bed->default_use_rela_p ? ".rela.plt" : ".rel.plt");
4066 if (s == NULL
4067 || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
4068 || ! bfd_set_section_alignment (abfd, s, ptralign))
4069 return FALSE;
4070
4071 if (! _bfd_mn10300_elf_create_got_section (abfd, info))
4072 return FALSE;
4073
4074 {
4075 const char * secname;
4076 char * relname;
4077 flagword secflags;
4078 asection * sec;
4079
4080 for (sec = abfd->sections; sec; sec = sec->next)
4081 {
4082 secflags = bfd_get_section_flags (abfd, sec);
4083 if ((secflags & (SEC_DATA | SEC_LINKER_CREATED))
4084 || ((secflags & SEC_HAS_CONTENTS) != SEC_HAS_CONTENTS))
4085 continue;
4086
4087 secname = bfd_get_section_name (abfd, sec);
4088 relname = (char *) bfd_malloc (strlen (secname) + 6);
4089 strcpy (relname, ".rela");
4090 strcat (relname, secname);
4091
4092 s = bfd_make_section (abfd, relname);
4093 if (s == NULL
4094 || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
4095 || ! bfd_set_section_alignment (abfd, s, ptralign))
4096 return FALSE;
4097 }
4098 }
4099
4100 if (bed->want_dynbss)
4101 {
4102 /* The .dynbss section is a place to put symbols which are defined
4103 by dynamic objects, are referenced by regular objects, and are
4104 not functions. We must allocate space for them in the process
4105 image and use a R_*_COPY reloc to tell the dynamic linker to
4106 initialize them at run time. The linker script puts the .dynbss
4107 section into the .bss section of the final image. */
4108 s = bfd_make_section (abfd, ".dynbss");
4109 if (s == NULL
4110 || ! bfd_set_section_flags (abfd, s, SEC_ALLOC))
4111 return FALSE;
4112
4113 /* The .rel[a].bss section holds copy relocs. This section is not
4114 normally needed. We need to create it here, though, so that the
4115 linker will map it to an output section. We can't just create it
4116 only if we need it, because we will not know whether we need it
4117 until we have seen all the input files, and the first time the
4118 main linker code calls BFD after examining all the input files
4119 (size_dynamic_sections) the input sections have already been
4120 mapped to the output sections. If the section turns out not to
4121 be needed, we can discard it later. We will never need this
4122 section when generating a shared object, since they do not use
4123 copy relocs. */
4124 if (! info->shared)
4125 {
4126 s = bfd_make_section (abfd,
4127 (bed->default_use_rela_p
4128 ? ".rela.bss" : ".rel.bss"));
4129 if (s == NULL
4130 || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
4131 || ! bfd_set_section_alignment (abfd, s, ptralign))
4132 return FALSE;
4133 }
4134 }
4135
4136 return TRUE;
4137 }
4138
4139 /* Adjust a symbol defined by a dynamic object and referenced by a
4140 regular object. The current definition is in some section of the
4141 dynamic object, but we're not including those sections. We have to
4142 change the definition to something the rest of the link can
4143 understand. */
4144
4145 static bfd_boolean
_bfd_mn10300_elf_adjust_dynamic_symbol(info,h)4146 _bfd_mn10300_elf_adjust_dynamic_symbol (info, h)
4147 struct bfd_link_info * info;
4148 struct elf_link_hash_entry * h;
4149 {
4150 bfd * dynobj;
4151 asection * s;
4152 unsigned int power_of_two;
4153
4154 dynobj = elf_hash_table (info)->dynobj;
4155
4156 /* Make sure we know what is going on here. */
4157 BFD_ASSERT (dynobj != NULL
4158 && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
4159 || h->weakdef != NULL
4160 || ((h->elf_link_hash_flags
4161 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
4162 && (h->elf_link_hash_flags
4163 & ELF_LINK_HASH_REF_REGULAR) != 0
4164 && (h->elf_link_hash_flags
4165 & ELF_LINK_HASH_DEF_REGULAR) == 0)));
4166
4167 /* If this is a function, put it in the procedure linkage table. We
4168 will fill in the contents of the procedure linkage table later,
4169 when we know the address of the .got section. */
4170 if (h->type == STT_FUNC
4171 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
4172 {
4173 if (! info->shared
4174 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
4175 && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0)
4176 {
4177 /* This case can occur if we saw a PLT reloc in an input
4178 file, but the symbol was never referred to by a dynamic
4179 object. In such a case, we don't actually need to build
4180 a procedure linkage table, and we can just do a REL32
4181 reloc instead. */
4182 BFD_ASSERT ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0);
4183 return TRUE;
4184 }
4185
4186 /* Make sure this symbol is output as a dynamic symbol. */
4187 if (h->dynindx == -1)
4188 {
4189 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4190 return FALSE;
4191 }
4192
4193 s = bfd_get_section_by_name (dynobj, ".plt");
4194 BFD_ASSERT (s != NULL);
4195
4196 /* If this is the first .plt entry, make room for the special
4197 first entry. */
4198 if (s->_raw_size == 0)
4199 s->_raw_size += elf_mn10300_sizeof_plt0 (info);
4200
4201 /* If this symbol is not defined in a regular file, and we are
4202 not generating a shared library, then set the symbol to this
4203 location in the .plt. This is required to make function
4204 pointers compare as equal between the normal executable and
4205 the shared library. */
4206 if (! info->shared
4207 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
4208 {
4209 h->root.u.def.section = s;
4210 h->root.u.def.value = s->_raw_size;
4211 }
4212
4213 h->plt.offset = s->_raw_size;
4214
4215 /* Make room for this entry. */
4216 s->_raw_size += elf_mn10300_sizeof_plt (info);
4217
4218 /* We also need to make an entry in the .got.plt section, which
4219 will be placed in the .got section by the linker script. */
4220
4221 s = bfd_get_section_by_name (dynobj, ".got.plt");
4222 BFD_ASSERT (s != NULL);
4223 s->_raw_size += 4;
4224
4225 /* We also need to make an entry in the .rela.plt section. */
4226
4227 s = bfd_get_section_by_name (dynobj, ".rela.plt");
4228 BFD_ASSERT (s != NULL);
4229 s->_raw_size += sizeof (Elf32_External_Rela);
4230
4231 return TRUE;
4232 }
4233
4234 /* If this is a weak symbol, and there is a real definition, the
4235 processor independent code will have arranged for us to see the
4236 real definition first, and we can just use the same value. */
4237 if (h->weakdef != NULL)
4238 {
4239 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
4240 || h->weakdef->root.type == bfd_link_hash_defweak);
4241 h->root.u.def.section = h->weakdef->root.u.def.section;
4242 h->root.u.def.value = h->weakdef->root.u.def.value;
4243 return TRUE;
4244 }
4245
4246 /* This is a reference to a symbol defined by a dynamic object which
4247 is not a function. */
4248
4249 /* If we are creating a shared library, we must presume that the
4250 only references to the symbol are via the global offset table.
4251 For such cases we need not do anything here; the relocations will
4252 be handled correctly by relocate_section. */
4253 if (info->shared)
4254 return TRUE;
4255
4256 /* If there are no references to this symbol that do not use the
4257 GOT, we don't need to generate a copy reloc. */
4258 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
4259 return TRUE;
4260
4261 /* We must allocate the symbol in our .dynbss section, which will
4262 become part of the .bss section of the executable. There will be
4263 an entry for this symbol in the .dynsym section. The dynamic
4264 object will contain position independent code, so all references
4265 from the dynamic object to this symbol will go through the global
4266 offset table. The dynamic linker will use the .dynsym entry to
4267 determine the address it must put in the global offset table, so
4268 both the dynamic object and the regular object will refer to the
4269 same memory location for the variable. */
4270
4271 s = bfd_get_section_by_name (dynobj, ".dynbss");
4272 BFD_ASSERT (s != NULL);
4273
4274 /* We must generate a R_MN10300_COPY reloc to tell the dynamic linker to
4275 copy the initial value out of the dynamic object and into the
4276 runtime process image. We need to remember the offset into the
4277 .rela.bss section we are going to use. */
4278 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4279 {
4280 asection * srel;
4281
4282 srel = bfd_get_section_by_name (dynobj, ".rela.bss");
4283 BFD_ASSERT (srel != NULL);
4284 srel->_raw_size += sizeof (Elf32_External_Rela);
4285 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
4286 }
4287
4288 /* We need to figure out the alignment required for this symbol. I
4289 have no idea how ELF linkers handle this. */
4290 power_of_two = bfd_log2 (h->size);
4291 if (power_of_two > 3)
4292 power_of_two = 3;
4293
4294 /* Apply the required alignment. */
4295 s->_raw_size = BFD_ALIGN (s->_raw_size,
4296 (bfd_size_type) (1 << power_of_two));
4297 if (power_of_two > bfd_get_section_alignment (dynobj, s))
4298 {
4299 if (! bfd_set_section_alignment (dynobj, s, power_of_two))
4300 return FALSE;
4301 }
4302
4303 /* Define the symbol as being at this point in the section. */
4304 h->root.u.def.section = s;
4305 h->root.u.def.value = s->_raw_size;
4306
4307 /* Increment the section size to make room for the symbol. */
4308 s->_raw_size += h->size;
4309
4310 return TRUE;
4311 }
4312
4313 /* This function is called via elf32_mn10300_link_hash_traverse if we are
4314 creating a shared object with -Bsymbolic. It discards the space
4315 allocated to copy PC relative relocs against symbols which are
4316 defined in regular objects. We allocated space for them in the
4317 check_relocs routine, but we won't fill them in in the
4318 relocate_section routine. */
4319
4320 static bfd_boolean
_bfd_mn10300_elf_discard_copies(h,info)4321 _bfd_mn10300_elf_discard_copies (h, info)
4322 struct elf32_mn10300_link_hash_entry *h;
4323 struct bfd_link_info *info;
4324 {
4325 struct elf_mn10300_pcrel_relocs_copied *s;
4326
4327 /* If a symbol has been forced local or we have found a regular
4328 definition for the symbolic link case, then we won't be needing
4329 any relocs. */
4330 if ((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
4331 && ((h->root.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0
4332 || info->symbolic))
4333 {
4334 for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
4335 s->section->_raw_size -= s->count * sizeof (Elf32_External_Rel);
4336 }
4337
4338 return TRUE;
4339 }
4340
4341 /* Set the sizes of the dynamic sections. */
4342
4343 static bfd_boolean
_bfd_mn10300_elf_size_dynamic_sections(output_bfd,info)4344 _bfd_mn10300_elf_size_dynamic_sections (output_bfd, info)
4345 bfd * output_bfd;
4346 struct bfd_link_info * info;
4347 {
4348 bfd * dynobj;
4349 asection * s;
4350 bfd_boolean plt;
4351 bfd_boolean relocs;
4352 bfd_boolean reltext;
4353
4354 dynobj = elf_hash_table (info)->dynobj;
4355 BFD_ASSERT (dynobj != NULL);
4356
4357 if (elf_hash_table (info)->dynamic_sections_created)
4358 {
4359 /* Set the contents of the .interp section to the interpreter. */
4360 if (info->executable)
4361 {
4362 s = bfd_get_section_by_name (dynobj, ".interp");
4363 BFD_ASSERT (s != NULL);
4364 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
4365 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
4366 }
4367 }
4368 else
4369 {
4370 /* We may have created entries in the .rela.got section.
4371 However, if we are not creating the dynamic sections, we will
4372 not actually use these entries. Reset the size of .rela.got,
4373 which will cause it to get stripped from the output file
4374 below. */
4375 s = bfd_get_section_by_name (dynobj, ".rela.got");
4376 if (s != NULL)
4377 s->_raw_size = 0;
4378 }
4379
4380 /* If this is a -Bsymbolic shared link, then we need to discard all
4381 PC relative relocs against symbols defined in a regular object.
4382 We allocated space for them in the check_relocs routine, but we
4383 will not fill them in in the relocate_section routine. */
4384 if (info->shared && info->symbolic)
4385 elf32_mn10300_link_hash_traverse (elf32_mn10300_hash_table (info),
4386 _bfd_mn10300_elf_discard_copies,
4387 info);
4388
4389 /* The check_relocs and adjust_dynamic_symbol entry points have
4390 determined the sizes of the various dynamic sections. Allocate
4391 memory for them. */
4392 plt = FALSE;
4393 relocs = FALSE;
4394 reltext = FALSE;
4395 for (s = dynobj->sections; s != NULL; s = s->next)
4396 {
4397 const char * name;
4398 bfd_boolean strip;
4399
4400 if ((s->flags & SEC_LINKER_CREATED) == 0)
4401 continue;
4402
4403 /* It's OK to base decisions on the section name, because none
4404 of the dynobj section names depend upon the input files. */
4405 name = bfd_get_section_name (dynobj, s);
4406
4407 strip = FALSE;
4408
4409 if (strcmp (name, ".plt") == 0)
4410 {
4411 if (s->_raw_size == 0)
4412 /* Strip this section if we don't need it; see the
4413 comment below. */
4414 strip = TRUE;
4415 else
4416 /* Remember whether there is a PLT. */
4417 plt = TRUE;
4418 }
4419 else if (strncmp (name, ".rela", 5) == 0)
4420 {
4421 if (s->_raw_size == 0)
4422 {
4423 /* If we don't need this section, strip it from the
4424 output file. This is mostly to handle .rela.bss and
4425 .rela.plt. We must create both sections in
4426 create_dynamic_sections, because they must be created
4427 before the linker maps input sections to output
4428 sections. The linker does that before
4429 adjust_dynamic_symbol is called, and it is that
4430 function which decides whether anything needs to go
4431 into these sections. */
4432 strip = TRUE;
4433 }
4434 else
4435 {
4436 asection * target;
4437
4438 /* Remember whether there are any reloc sections other
4439 than .rela.plt. */
4440 if (strcmp (name, ".rela.plt") != 0)
4441 {
4442 const char * outname;
4443
4444 relocs = TRUE;
4445
4446 /* If this relocation section applies to a read only
4447 section, then we probably need a DT_TEXTREL
4448 entry. The entries in the .rela.plt section
4449 really apply to the .got section, which we
4450 created ourselves and so know is not readonly. */
4451 outname = bfd_get_section_name (output_bfd,
4452 s->output_section);
4453 target = bfd_get_section_by_name (output_bfd, outname + 5);
4454 if (target != NULL
4455 && (target->flags & SEC_READONLY) != 0
4456 && (target->flags & SEC_ALLOC) != 0)
4457 reltext = TRUE;
4458 }
4459
4460 /* We use the reloc_count field as a counter if we need
4461 to copy relocs into the output file. */
4462 s->reloc_count = 0;
4463 }
4464 }
4465 else if (strncmp (name, ".got", 4) != 0)
4466 /* It's not one of our sections, so don't allocate space. */
4467 continue;
4468
4469 if (strip)
4470 {
4471 _bfd_strip_section_from_output (info, s);
4472 continue;
4473 }
4474
4475 /* Allocate memory for the section contents. We use bfd_zalloc
4476 here in case unused entries are not reclaimed before the
4477 section's contents are written out. This should not happen,
4478 but this way if it does, we get a R_MN10300_NONE reloc
4479 instead of garbage. */
4480 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
4481 if (s->contents == NULL && s->_raw_size != 0)
4482 return FALSE;
4483 }
4484
4485 if (elf_hash_table (info)->dynamic_sections_created)
4486 {
4487 /* Add some entries to the .dynamic section. We fill in the
4488 values later, in _bfd_mn10300_elf_finish_dynamic_sections,
4489 but we must add the entries now so that we get the correct
4490 size for the .dynamic section. The DT_DEBUG entry is filled
4491 in by the dynamic linker and used by the debugger. */
4492 if (! info->shared)
4493 {
4494 if (!_bfd_elf_add_dynamic_entry (info, DT_DEBUG, 0))
4495 return FALSE;
4496 }
4497
4498 if (plt)
4499 {
4500 if (!_bfd_elf_add_dynamic_entry (info, DT_PLTGOT, 0)
4501 || !_bfd_elf_add_dynamic_entry (info, DT_PLTRELSZ, 0)
4502 || !_bfd_elf_add_dynamic_entry (info, DT_PLTREL, DT_RELA)
4503 || !_bfd_elf_add_dynamic_entry (info, DT_JMPREL, 0))
4504 return FALSE;
4505 }
4506
4507 if (relocs)
4508 {
4509 if (!_bfd_elf_add_dynamic_entry (info, DT_RELA, 0)
4510 || !_bfd_elf_add_dynamic_entry (info, DT_RELASZ, 0)
4511 || !_bfd_elf_add_dynamic_entry (info, DT_RELAENT,
4512 sizeof (Elf32_External_Rela)))
4513 return FALSE;
4514 }
4515
4516 if (reltext)
4517 {
4518 if (!_bfd_elf_add_dynamic_entry (info, DT_TEXTREL, 0))
4519 return FALSE;
4520 }
4521 }
4522
4523 return TRUE;
4524 }
4525
4526 /* Finish up dynamic symbol handling. We set the contents of various
4527 dynamic sections here. */
4528
4529 static bfd_boolean
_bfd_mn10300_elf_finish_dynamic_symbol(output_bfd,info,h,sym)4530 _bfd_mn10300_elf_finish_dynamic_symbol (output_bfd, info, h, sym)
4531 bfd * output_bfd;
4532 struct bfd_link_info * info;
4533 struct elf_link_hash_entry * h;
4534 Elf_Internal_Sym * sym;
4535 {
4536 bfd * dynobj;
4537
4538 dynobj = elf_hash_table (info)->dynobj;
4539
4540 if (h->plt.offset != (bfd_vma) -1)
4541 {
4542 asection * splt;
4543 asection * sgot;
4544 asection * srel;
4545 bfd_vma plt_index;
4546 bfd_vma got_offset;
4547 Elf_Internal_Rela rel;
4548
4549 /* This symbol has an entry in the procedure linkage table. Set
4550 it up. */
4551
4552 BFD_ASSERT (h->dynindx != -1);
4553
4554 splt = bfd_get_section_by_name (dynobj, ".plt");
4555 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
4556 srel = bfd_get_section_by_name (dynobj, ".rela.plt");
4557 BFD_ASSERT (splt != NULL && sgot != NULL && srel != NULL);
4558
4559 /* Get the index in the procedure linkage table which
4560 corresponds to this symbol. This is the index of this symbol
4561 in all the symbols for which we are making plt entries. The
4562 first entry in the procedure linkage table is reserved. */
4563 plt_index = ((h->plt.offset - elf_mn10300_sizeof_plt0 (info))
4564 / elf_mn10300_sizeof_plt (info));
4565
4566 /* Get the offset into the .got table of the entry that
4567 corresponds to this function. Each .got entry is 4 bytes.
4568 The first three are reserved. */
4569 got_offset = (plt_index + 3) * 4;
4570
4571 /* Fill in the entry in the procedure linkage table. */
4572 if (! info->shared)
4573 {
4574 memcpy (splt->contents + h->plt.offset, elf_mn10300_plt_entry,
4575 elf_mn10300_sizeof_plt (info));
4576 bfd_put_32 (output_bfd,
4577 (sgot->output_section->vma
4578 + sgot->output_offset
4579 + got_offset),
4580 (splt->contents + h->plt.offset
4581 + elf_mn10300_plt_symbol_offset (info)));
4582
4583 bfd_put_32 (output_bfd,
4584 (1 - h->plt.offset - elf_mn10300_plt_plt0_offset (info)),
4585 (splt->contents + h->plt.offset
4586 + elf_mn10300_plt_plt0_offset (info)));
4587 }
4588 else
4589 {
4590 memcpy (splt->contents + h->plt.offset, elf_mn10300_pic_plt_entry,
4591 elf_mn10300_sizeof_plt (info));
4592
4593 bfd_put_32 (output_bfd, got_offset,
4594 (splt->contents + h->plt.offset
4595 + elf_mn10300_plt_symbol_offset (info)));
4596 }
4597
4598 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
4599 (splt->contents + h->plt.offset
4600 + elf_mn10300_plt_reloc_offset (info)));
4601
4602 /* Fill in the entry in the global offset table. */
4603 bfd_put_32 (output_bfd,
4604 (splt->output_section->vma
4605 + splt->output_offset
4606 + h->plt.offset
4607 + elf_mn10300_plt_temp_offset (info)),
4608 sgot->contents + got_offset);
4609
4610 /* Fill in the entry in the .rela.plt section. */
4611 rel.r_offset = (sgot->output_section->vma
4612 + sgot->output_offset
4613 + got_offset);
4614 rel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_JMP_SLOT);
4615 rel.r_addend = 0;
4616 bfd_elf32_swap_reloca_out (output_bfd, &rel,
4617 (bfd_byte *) ((Elf32_External_Rela *) srel->contents
4618 + plt_index));
4619
4620 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
4621 /* Mark the symbol as undefined, rather than as defined in
4622 the .plt section. Leave the value alone. */
4623 sym->st_shndx = SHN_UNDEF;
4624 }
4625
4626 if (h->got.offset != (bfd_vma) -1)
4627 {
4628 asection * sgot;
4629 asection * srel;
4630 Elf_Internal_Rela rel;
4631
4632 /* This symbol has an entry in the global offset table. Set it up. */
4633
4634 sgot = bfd_get_section_by_name (dynobj, ".got");
4635 srel = bfd_get_section_by_name (dynobj, ".rela.got");
4636 BFD_ASSERT (sgot != NULL && srel != NULL);
4637
4638 rel.r_offset = (sgot->output_section->vma
4639 + sgot->output_offset
4640 + (h->got.offset &~ 1));
4641
4642 /* If this is a -Bsymbolic link, and the symbol is defined
4643 locally, we just want to emit a RELATIVE reloc. Likewise if
4644 the symbol was forced to be local because of a version file.
4645 The entry in the global offset table will already have been
4646 initialized in the relocate_section function. */
4647 if (info->shared
4648 && (info->symbolic || h->dynindx == -1)
4649 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
4650 {
4651 rel.r_info = ELF32_R_INFO (0, R_MN10300_RELATIVE);
4652 rel.r_addend = (h->root.u.def.value
4653 + h->root.u.def.section->output_section->vma
4654 + h->root.u.def.section->output_offset);
4655 }
4656 else
4657 {
4658 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
4659 rel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_GLOB_DAT);
4660 rel.r_addend = 0;
4661 }
4662
4663 bfd_elf32_swap_reloca_out (output_bfd, &rel,
4664 (bfd_byte *) ((Elf32_External_Rela *) srel->contents
4665 + srel->reloc_count));
4666 ++ srel->reloc_count;
4667 }
4668
4669 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
4670 {
4671 asection * s;
4672 Elf_Internal_Rela rel;
4673
4674 /* This symbol needs a copy reloc. Set it up. */
4675 BFD_ASSERT (h->dynindx != -1
4676 && (h->root.type == bfd_link_hash_defined
4677 || h->root.type == bfd_link_hash_defweak));
4678
4679 s = bfd_get_section_by_name (h->root.u.def.section->owner,
4680 ".rela.bss");
4681 BFD_ASSERT (s != NULL);
4682
4683 rel.r_offset = (h->root.u.def.value
4684 + h->root.u.def.section->output_section->vma
4685 + h->root.u.def.section->output_offset);
4686 rel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_COPY);
4687 rel.r_addend = 0;
4688 bfd_elf32_swap_reloca_out (output_bfd, &rel,
4689 (bfd_byte *) ((Elf32_External_Rela *) s->contents
4690 + s->reloc_count));
4691 ++ s->reloc_count;
4692 }
4693
4694 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
4695 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
4696 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
4697 sym->st_shndx = SHN_ABS;
4698
4699 return TRUE;
4700 }
4701
4702 /* Finish up the dynamic sections. */
4703
4704 static bfd_boolean
_bfd_mn10300_elf_finish_dynamic_sections(output_bfd,info)4705 _bfd_mn10300_elf_finish_dynamic_sections (output_bfd, info)
4706 bfd * output_bfd;
4707 struct bfd_link_info * info;
4708 {
4709 bfd * dynobj;
4710 asection * sgot;
4711 asection * sdyn;
4712
4713 dynobj = elf_hash_table (info)->dynobj;
4714
4715 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
4716 BFD_ASSERT (sgot != NULL);
4717 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
4718
4719 if (elf_hash_table (info)->dynamic_sections_created)
4720 {
4721 asection * splt;
4722 Elf32_External_Dyn * dyncon;
4723 Elf32_External_Dyn * dynconend;
4724
4725 BFD_ASSERT (sdyn != NULL);
4726
4727 dyncon = (Elf32_External_Dyn *) sdyn->contents;
4728 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
4729
4730 for (; dyncon < dynconend; dyncon++)
4731 {
4732 Elf_Internal_Dyn dyn;
4733 const char * name;
4734 asection * s;
4735
4736 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4737
4738 switch (dyn.d_tag)
4739 {
4740 default:
4741 break;
4742
4743 case DT_PLTGOT:
4744 name = ".got";
4745 goto get_vma;
4746
4747 case DT_JMPREL:
4748 name = ".rela.plt";
4749 get_vma:
4750 s = bfd_get_section_by_name (output_bfd, name);
4751 BFD_ASSERT (s != NULL);
4752 dyn.d_un.d_ptr = s->vma;
4753 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4754 break;
4755
4756 case DT_PLTRELSZ:
4757 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
4758 BFD_ASSERT (s != NULL);
4759 if (s->_cooked_size != 0)
4760 dyn.d_un.d_val = s->_cooked_size;
4761 else
4762 dyn.d_un.d_val = s->_raw_size;
4763 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4764 break;
4765
4766 case DT_RELASZ:
4767 /* My reading of the SVR4 ABI indicates that the
4768 procedure linkage table relocs (DT_JMPREL) should be
4769 included in the overall relocs (DT_RELA). This is
4770 what Solaris does. However, UnixWare can not handle
4771 that case. Therefore, we override the DT_RELASZ entry
4772 here to make it not include the JMPREL relocs. Since
4773 the linker script arranges for .rela.plt to follow all
4774 other relocation sections, we don't have to worry
4775 about changing the DT_RELA entry. */
4776 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
4777 if (s != NULL)
4778 {
4779 if (s->_cooked_size != 0)
4780 dyn.d_un.d_val -= s->_cooked_size;
4781 else
4782 dyn.d_un.d_val -= s->_raw_size;
4783 }
4784 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4785 break;
4786 }
4787 }
4788
4789 /* Fill in the first entry in the procedure linkage table. */
4790 splt = bfd_get_section_by_name (dynobj, ".plt");
4791 if (splt && splt->_raw_size > 0)
4792 {
4793 if (info->shared)
4794 {
4795 memcpy (splt->contents, elf_mn10300_pic_plt_entry,
4796 elf_mn10300_sizeof_plt (info));
4797 }
4798 else
4799 {
4800 memcpy (splt->contents, elf_mn10300_plt0_entry, PLT0_ENTRY_SIZE);
4801 bfd_put_32 (output_bfd,
4802 sgot->output_section->vma + sgot->output_offset + 4,
4803 splt->contents + elf_mn10300_plt0_gotid_offset (info));
4804 bfd_put_32 (output_bfd,
4805 sgot->output_section->vma + sgot->output_offset + 8,
4806 splt->contents + elf_mn10300_plt0_linker_offset (info));
4807 }
4808
4809 /* UnixWare sets the entsize of .plt to 4, although that doesn't
4810 really seem like the right value. */
4811 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
4812 }
4813 }
4814
4815 /* Fill in the first three entries in the global offset table. */
4816 if (sgot->_raw_size > 0)
4817 {
4818 if (sdyn == NULL)
4819 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
4820 else
4821 bfd_put_32 (output_bfd,
4822 sdyn->output_section->vma + sdyn->output_offset,
4823 sgot->contents);
4824 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
4825 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
4826 }
4827
4828 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
4829
4830 return TRUE;
4831 }
4832
4833 #ifndef ELF_ARCH
4834 #define TARGET_LITTLE_SYM bfd_elf32_mn10300_vec
4835 #define TARGET_LITTLE_NAME "elf32-mn10300"
4836 #define ELF_ARCH bfd_arch_mn10300
4837 #define ELF_MACHINE_CODE EM_MN10300
4838 #define ELF_MACHINE_ALT1 EM_CYGNUS_MN10300
4839 #define ELF_MAXPAGESIZE 0x1000
4840 #endif
4841
4842 #define elf_info_to_howto mn10300_info_to_howto
4843 #define elf_info_to_howto_rel 0
4844 #define elf_backend_can_gc_sections 1
4845 #define elf_backend_rela_normal 1
4846 #define elf_backend_check_relocs mn10300_elf_check_relocs
4847 #define elf_backend_gc_mark_hook mn10300_elf_gc_mark_hook
4848 #define elf_backend_relocate_section mn10300_elf_relocate_section
4849 #define bfd_elf32_bfd_relax_section mn10300_elf_relax_section
4850 #define bfd_elf32_bfd_get_relocated_section_contents \
4851 mn10300_elf_get_relocated_section_contents
4852 #define bfd_elf32_bfd_link_hash_table_create \
4853 elf32_mn10300_link_hash_table_create
4854 #define bfd_elf32_bfd_link_hash_table_free \
4855 elf32_mn10300_link_hash_table_free
4856
4857 #ifndef elf_symbol_leading_char
4858 #define elf_symbol_leading_char '_'
4859 #endif
4860
4861 /* So we can set bits in e_flags. */
4862 #define elf_backend_final_write_processing \
4863 _bfd_mn10300_elf_final_write_processing
4864 #define elf_backend_object_p _bfd_mn10300_elf_object_p
4865
4866 #define bfd_elf32_bfd_merge_private_bfd_data \
4867 _bfd_mn10300_elf_merge_private_bfd_data
4868
4869 #define elf_backend_can_gc_sections 1
4870 #define elf_backend_create_dynamic_sections \
4871 _bfd_mn10300_elf_create_dynamic_sections
4872 #define elf_backend_adjust_dynamic_symbol \
4873 _bfd_mn10300_elf_adjust_dynamic_symbol
4874 #define elf_backend_size_dynamic_sections \
4875 _bfd_mn10300_elf_size_dynamic_sections
4876 #define elf_backend_finish_dynamic_symbol \
4877 _bfd_mn10300_elf_finish_dynamic_symbol
4878 #define elf_backend_finish_dynamic_sections \
4879 _bfd_mn10300_elf_finish_dynamic_sections
4880
4881 #define elf_backend_want_got_plt 1
4882 #define elf_backend_plt_readonly 1
4883 #define elf_backend_want_plt_sym 0
4884 #define elf_backend_got_header_size 12
4885
4886 #include "elf32-target.h"
4887