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* Makefile.am (EXPECT): Set to expect.
[binutils.git] / bfd / elf-m10300.c
blob09d746ba278408ecb1469660978d96d075e2dd1c
1 /* Matsushita 10300 specific support for 32-bit ELF
2 Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
3 Free Software Foundation, Inc.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
20
21 #include "bfd.h"
22 #include "sysdep.h"
23 #include "libbfd.h"
24 #include "elf-bfd.h"
25 #include "elf/mn10300.h"
26
27 static bfd_reloc_status_type mn10300_elf_final_link_relocate
28 PARAMS ((reloc_howto_type *, bfd *, bfd *, asection *, bfd_byte *,
29 bfd_vma, bfd_vma, bfd_vma,
30 struct elf_link_hash_entry *, unsigned long, struct bfd_link_info *,
31 asection *, int));
32 static bfd_boolean mn10300_elf_relocate_section
33 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
34 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
35 static bfd_boolean mn10300_elf_relax_section
36 PARAMS ((bfd *, asection *, struct bfd_link_info *, bfd_boolean *));
37 static bfd_byte * mn10300_elf_get_relocated_section_contents
38 PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_order *,
39 bfd_byte *, bfd_boolean, asymbol **));
40 static unsigned long elf_mn10300_mach
41 PARAMS ((flagword));
42 void _bfd_mn10300_elf_final_write_processing
43 PARAMS ((bfd *, bfd_boolean));
44 bfd_boolean _bfd_mn10300_elf_object_p
45 PARAMS ((bfd *));
46 bfd_boolean _bfd_mn10300_elf_merge_private_bfd_data
47 PARAMS ((bfd *,bfd *));
48
49 /* The mn10300 linker needs to keep track of the number of relocs that
50 it decides to copy in check_relocs for each symbol. This is so
51 that it can discard PC relative relocs if it doesn't need them when
52 linking with -Bsymbolic. We store the information in a field
53 extending the regular ELF linker hash table. */
54
55 struct elf32_mn10300_link_hash_entry {
56 /* The basic elf link hash table entry. */
57 struct elf_link_hash_entry root;
58
59 /* For function symbols, the number of times this function is
60 called directly (ie by name). */
61 unsigned int direct_calls;
62
63 /* For function symbols, the size of this function's stack
64 (if <= 255 bytes). We stuff this into "call" instructions
65 to this target when it's valid and profitable to do so.
66
67 This does not include stack allocated by movm! */
68 unsigned char stack_size;
69
70 /* For function symbols, arguments (if any) for movm instruction
71 in the prologue. We stuff this value into "call" instructions
72 to the target when it's valid and profitable to do so. */
73 unsigned char movm_args;
74
75 /* For function symbols, the amount of stack space that would be allocated
76 by the movm instruction. This is redundant with movm_args, but we
77 add it to the hash table to avoid computing it over and over. */
78 unsigned char movm_stack_size;
79
80 /* When set, convert all "call" instructions to this target into "calls"
81 instructions. */
82 #define MN10300_CONVERT_CALL_TO_CALLS 0x1
83
84 /* Used to mark functions which have had redundant parts of their
85 prologue deleted. */
86 #define MN10300_DELETED_PROLOGUE_BYTES 0x2
87 unsigned char flags;
88 };
89
90 /* We derive a hash table from the main elf linker hash table so
91 we can store state variables and a secondary hash table without
92 resorting to global variables. */
93 struct elf32_mn10300_link_hash_table {
94 /* The main hash table. */
95 struct elf_link_hash_table root;
96
97 /* A hash table for static functions. We could derive a new hash table
98 instead of using the full elf32_mn10300_link_hash_table if we wanted
99 to save some memory. */
100 struct elf32_mn10300_link_hash_table *static_hash_table;
101
102 /* Random linker state flags. */
103 #define MN10300_HASH_ENTRIES_INITIALIZED 0x1
104 char flags;
105 };
106
107 /* For MN10300 linker hash table. */
108
109 /* Get the MN10300 ELF linker hash table from a link_info structure. */
110
111 #define elf32_mn10300_hash_table(p) \
112 ((struct elf32_mn10300_link_hash_table *) ((p)->hash))
113
114 #define elf32_mn10300_link_hash_traverse(table, func, info) \
115 (elf_link_hash_traverse \
116 (&(table)->root, \
117 (bfd_boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
118 (info)))
119
120 static struct bfd_hash_entry *elf32_mn10300_link_hash_newfunc
121 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
122 static struct bfd_link_hash_table *elf32_mn10300_link_hash_table_create
123 PARAMS ((bfd *));
124 static void elf32_mn10300_link_hash_table_free
125 PARAMS ((struct bfd_link_hash_table *));
126
127 static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
128 PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
129 static void mn10300_info_to_howto
130 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
131 static bfd_boolean mn10300_elf_check_relocs
132 PARAMS ((bfd *, struct bfd_link_info *, asection *,
133 const Elf_Internal_Rela *));
134 static asection *mn10300_elf_gc_mark_hook
135 PARAMS ((asection *, struct bfd_link_info *info, Elf_Internal_Rela *,
136 struct elf_link_hash_entry *, Elf_Internal_Sym *));
137 static bfd_boolean mn10300_elf_relax_delete_bytes
138 PARAMS ((bfd *, asection *, bfd_vma, int));
139 static bfd_boolean mn10300_elf_symbol_address_p
140 PARAMS ((bfd *, asection *, Elf_Internal_Sym *, bfd_vma));
141 static bfd_boolean elf32_mn10300_finish_hash_table_entry
142 PARAMS ((struct bfd_hash_entry *, PTR));
143 static void compute_function_info
144 PARAMS ((bfd *, struct elf32_mn10300_link_hash_entry *,
145 bfd_vma, unsigned char *));
146
147 static bfd_boolean _bfd_mn10300_elf_create_got_section
148 PARAMS ((bfd *, struct bfd_link_info *));
149 static bfd_boolean _bfd_mn10300_elf_create_dynamic_sections
150 PARAMS ((bfd *, struct bfd_link_info *));
151 static bfd_boolean _bfd_mn10300_elf_adjust_dynamic_symbol
152 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
153 static bfd_boolean _bfd_mn10300_elf_size_dynamic_sections
154 PARAMS ((bfd *, struct bfd_link_info *));
155 static bfd_boolean _bfd_mn10300_elf_finish_dynamic_symbol
156 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
157 Elf_Internal_Sym *));
158 static bfd_boolean _bfd_mn10300_elf_finish_dynamic_sections
159 PARAMS ((bfd *, struct bfd_link_info *));
160
161 static reloc_howto_type elf_mn10300_howto_table[] = {
162 /* Dummy relocation. Does nothing. */
163 HOWTO (R_MN10300_NONE,
164 0,
165 2,
166 16,
167 FALSE,
168 0,
169 complain_overflow_bitfield,
170 bfd_elf_generic_reloc,
171 "R_MN10300_NONE",
172 FALSE,
173 0,
174 0,
175 FALSE),
176 /* Standard 32 bit reloc. */
177 HOWTO (R_MN10300_32,
178 0,
179 2,
180 32,
181 FALSE,
182 0,
183 complain_overflow_bitfield,
184 bfd_elf_generic_reloc,
185 "R_MN10300_32",
186 FALSE,
187 0xffffffff,
188 0xffffffff,
189 FALSE),
190 /* Standard 16 bit reloc. */
191 HOWTO (R_MN10300_16,
192 0,
193 1,
194 16,
195 FALSE,
196 0,
197 complain_overflow_bitfield,
198 bfd_elf_generic_reloc,
199 "R_MN10300_16",
200 FALSE,
201 0xffff,
202 0xffff,
203 FALSE),
204 /* Standard 8 bit reloc. */
205 HOWTO (R_MN10300_8,
206 0,
207 0,
208 8,
209 FALSE,
210 0,
211 complain_overflow_bitfield,
212 bfd_elf_generic_reloc,
213 "R_MN10300_8",
214 FALSE,
215 0xff,
216 0xff,
217 FALSE),
218 /* Standard 32bit pc-relative reloc. */
219 HOWTO (R_MN10300_PCREL32,
220 0,
221 2,
222 32,
223 TRUE,
224 0,
225 complain_overflow_bitfield,
226 bfd_elf_generic_reloc,
227 "R_MN10300_PCREL32",
228 FALSE,
229 0xffffffff,
230 0xffffffff,
231 TRUE),
232 /* Standard 16bit pc-relative reloc. */
233 HOWTO (R_MN10300_PCREL16,
234 0,
235 1,
236 16,
237 TRUE,
238 0,
239 complain_overflow_bitfield,
240 bfd_elf_generic_reloc,
241 "R_MN10300_PCREL16",
242 FALSE,
243 0xffff,
244 0xffff,
245 TRUE),
246 /* Standard 8 pc-relative reloc. */
247 HOWTO (R_MN10300_PCREL8,
248 0,
249 0,
250 8,
251 TRUE,
252 0,
253 complain_overflow_bitfield,
254 bfd_elf_generic_reloc,
255 "R_MN10300_PCREL8",
256 FALSE,
257 0xff,
258 0xff,
259 TRUE),
260
261 /* GNU extension to record C++ vtable hierarchy */
262 HOWTO (R_MN10300_GNU_VTINHERIT, /* type */
263 0, /* rightshift */
264 0, /* size (0 = byte, 1 = short, 2 = long) */
265 0, /* bitsize */
266 FALSE, /* pc_relative */
267 0, /* bitpos */
268 complain_overflow_dont, /* complain_on_overflow */
269 NULL, /* special_function */
270 "R_MN10300_GNU_VTINHERIT", /* name */
271 FALSE, /* partial_inplace */
272 0, /* src_mask */
273 0, /* dst_mask */
274 FALSE), /* pcrel_offset */
275
276 /* GNU extension to record C++ vtable member usage */
277 HOWTO (R_MN10300_GNU_VTENTRY, /* type */
278 0, /* rightshift */
279 0, /* size (0 = byte, 1 = short, 2 = long) */
280 0, /* bitsize */
281 FALSE, /* pc_relative */
282 0, /* bitpos */
283 complain_overflow_dont, /* complain_on_overflow */
284 NULL, /* special_function */
285 "R_MN10300_GNU_VTENTRY", /* name */
286 FALSE, /* partial_inplace */
287 0, /* src_mask */
288 0, /* dst_mask */
289 FALSE), /* pcrel_offset */
290
291 /* Standard 24 bit reloc. */
292 HOWTO (R_MN10300_24,
293 0,
294 2,
295 24,
296 FALSE,
297 0,
298 complain_overflow_bitfield,
299 bfd_elf_generic_reloc,
300 "R_MN10300_24",
301 FALSE,
302 0xffffff,
303 0xffffff,
304 FALSE),
305 HOWTO (R_MN10300_GOTPC32, /* type */
306 0, /* rightshift */
307 2, /* size (0 = byte, 1 = short, 2 = long) */
308 32, /* bitsize */
309 TRUE, /* pc_relative */
310 0, /* bitpos */
311 complain_overflow_bitfield, /* complain_on_overflow */
312 bfd_elf_generic_reloc, /* */
313 "R_MN10300_GOTPC32", /* name */
314 FALSE, /* partial_inplace */
315 0xffffffff, /* src_mask */
316 0xffffffff, /* dst_mask */
317 TRUE), /* pcrel_offset */
318
319 HOWTO (R_MN10300_GOTPC16, /* type */
320 0, /* rightshift */
321 1, /* size (0 = byte, 1 = short, 2 = long) */
322 16, /* bitsize */
323 TRUE, /* pc_relative */
324 0, /* bitpos */
325 complain_overflow_bitfield, /* complain_on_overflow */
326 bfd_elf_generic_reloc, /* */
327 "R_MN10300_GOTPC16", /* name */
328 FALSE, /* partial_inplace */
329 0xffff, /* src_mask */
330 0xffff, /* dst_mask */
331 TRUE), /* pcrel_offset */
332
333 HOWTO (R_MN10300_GOTOFF32, /* type */
334 0, /* rightshift */
335 2, /* size (0 = byte, 1 = short, 2 = long) */
336 32, /* bitsize */
337 FALSE, /* pc_relative */
338 0, /* bitpos */
339 complain_overflow_bitfield, /* complain_on_overflow */
340 bfd_elf_generic_reloc, /* */
341 "R_MN10300_GOTOFF32", /* name */
342 FALSE, /* partial_inplace */
343 0xffffffff, /* src_mask */
344 0xffffffff, /* dst_mask */
345 FALSE), /* pcrel_offset */
346
347 HOWTO (R_MN10300_GOTOFF24, /* type */
348 0, /* rightshift */
349 2, /* size (0 = byte, 1 = short, 2 = long) */
350 24, /* bitsize */
351 FALSE, /* pc_relative */
352 0, /* bitpos */
353 complain_overflow_bitfield, /* complain_on_overflow */
354 bfd_elf_generic_reloc, /* */
355 "R_MN10300_GOTOFF24", /* name */
356 FALSE, /* partial_inplace */
357 0xffffff, /* src_mask */
358 0xffffff, /* dst_mask */
359 FALSE), /* pcrel_offset */
360
361 HOWTO (R_MN10300_GOTOFF16, /* type */
362 0, /* rightshift */
363 1, /* size (0 = byte, 1 = short, 2 = long) */
364 16, /* bitsize */
365 FALSE, /* pc_relative */
366 0, /* bitpos */
367 complain_overflow_bitfield, /* complain_on_overflow */
368 bfd_elf_generic_reloc, /* */
369 "R_MN10300_GOTOFF16", /* name */
370 FALSE, /* partial_inplace */
371 0xffff, /* src_mask */
372 0xffff, /* dst_mask */
373 FALSE), /* pcrel_offset */
374
375 HOWTO (R_MN10300_PLT32, /* type */
376 0, /* rightshift */
377 2, /* size (0 = byte, 1 = short, 2 = long) */
378 32, /* bitsize */
379 TRUE, /* pc_relative */
380 0, /* bitpos */
381 complain_overflow_bitfield, /* complain_on_overflow */
382 bfd_elf_generic_reloc, /* */
383 "R_MN10300_PLT32", /* name */
384 FALSE, /* partial_inplace */
385 0xffffffff, /* src_mask */
386 0xffffffff, /* dst_mask */
387 TRUE), /* pcrel_offset */
388
389 HOWTO (R_MN10300_PLT16, /* type */
390 0, /* rightshift */
391 1, /* size (0 = byte, 1 = short, 2 = long) */
392 16, /* bitsize */
393 TRUE, /* pc_relative */
394 0, /* bitpos */
395 complain_overflow_bitfield, /* complain_on_overflow */
396 bfd_elf_generic_reloc, /* */
397 "R_MN10300_PLT16", /* name */
398 FALSE, /* partial_inplace */
399 0xffff, /* src_mask */
400 0xffff, /* dst_mask */
401 TRUE), /* pcrel_offset */
402
403 HOWTO (R_MN10300_GOT32, /* type */
404 0, /* rightshift */
405 2, /* size (0 = byte, 1 = short, 2 = long) */
406 32, /* bitsize */
407 FALSE, /* pc_relative */
408 0, /* bitpos */
409 complain_overflow_bitfield, /* complain_on_overflow */
410 bfd_elf_generic_reloc, /* */
411 "R_MN10300_GOT32", /* name */
412 FALSE, /* partial_inplace */
413 0xffffffff, /* src_mask */
414 0xffffffff, /* dst_mask */
415 FALSE), /* pcrel_offset */
416
417 HOWTO (R_MN10300_GOT24, /* type */
418 0, /* rightshift */
419 2, /* size (0 = byte, 1 = short, 2 = long) */
420 24, /* bitsize */
421 FALSE, /* pc_relative */
422 0, /* bitpos */
423 complain_overflow_bitfield, /* complain_on_overflow */
424 bfd_elf_generic_reloc, /* */
425 "R_MN10300_GOT24", /* name */
426 FALSE, /* partial_inplace */
427 0xffffffff, /* src_mask */
428 0xffffffff, /* dst_mask */
429 FALSE), /* pcrel_offset */
430
431 HOWTO (R_MN10300_GOT16, /* type */
432 0, /* rightshift */
433 1, /* size (0 = byte, 1 = short, 2 = long) */
434 16, /* bitsize */
435 FALSE, /* pc_relative */
436 0, /* bitpos */
437 complain_overflow_bitfield, /* complain_on_overflow */
438 bfd_elf_generic_reloc, /* */
439 "R_MN10300_GOT16", /* name */
440 FALSE, /* partial_inplace */
441 0xffffffff, /* src_mask */
442 0xffffffff, /* dst_mask */
443 FALSE), /* pcrel_offset */
444
445 HOWTO (R_MN10300_COPY, /* type */
446 0, /* rightshift */
447 2, /* size (0 = byte, 1 = short, 2 = long) */
448 32, /* bitsize */
449 FALSE, /* pc_relative */
450 0, /* bitpos */
451 complain_overflow_bitfield, /* complain_on_overflow */
452 bfd_elf_generic_reloc, /* */
453 "R_MN10300_COPY", /* name */
454 FALSE, /* partial_inplace */
455 0xffffffff, /* src_mask */
456 0xffffffff, /* dst_mask */
457 FALSE), /* pcrel_offset */
458
459 HOWTO (R_MN10300_GLOB_DAT, /* type */
460 0, /* rightshift */
461 2, /* size (0 = byte, 1 = short, 2 = long) */
462 32, /* bitsize */
463 FALSE, /* pc_relative */
464 0, /* bitpos */
465 complain_overflow_bitfield, /* complain_on_overflow */
466 bfd_elf_generic_reloc, /* */
467 "R_MN10300_GLOB_DAT", /* name */
468 FALSE, /* partial_inplace */
469 0xffffffff, /* src_mask */
470 0xffffffff, /* dst_mask */
471 FALSE), /* pcrel_offset */
472
473 HOWTO (R_MN10300_JMP_SLOT, /* type */
474 0, /* rightshift */
475 2, /* size (0 = byte, 1 = short, 2 = long) */
476 32, /* bitsize */
477 FALSE, /* pc_relative */
478 0, /* bitpos */
479 complain_overflow_bitfield, /* complain_on_overflow */
480 bfd_elf_generic_reloc, /* */
481 "R_MN10300_JMP_SLOT", /* name */
482 FALSE, /* partial_inplace */
483 0xffffffff, /* src_mask */
484 0xffffffff, /* dst_mask */
485 FALSE), /* pcrel_offset */
486
487 HOWTO (R_MN10300_RELATIVE, /* type */
488 0, /* rightshift */
489 2, /* size (0 = byte, 1 = short, 2 = long) */
490 32, /* bitsize */
491 FALSE, /* pc_relative */
492 0, /* bitpos */
493 complain_overflow_bitfield, /* complain_on_overflow */
494 bfd_elf_generic_reloc, /* */
495 "R_MN10300_RELATIVE", /* name */
496 FALSE, /* partial_inplace */
497 0xffffffff, /* src_mask */
498 0xffffffff, /* dst_mask */
499 FALSE), /* pcrel_offset */
500
501 };
502
503 struct mn10300_reloc_map {
504 bfd_reloc_code_real_type bfd_reloc_val;
505 unsigned char elf_reloc_val;
506 };
507
508 static const struct mn10300_reloc_map mn10300_reloc_map[] = {
509 { BFD_RELOC_NONE, R_MN10300_NONE, },
510 { BFD_RELOC_32, R_MN10300_32, },
511 { BFD_RELOC_16, R_MN10300_16, },
512 { BFD_RELOC_8, R_MN10300_8, },
513 { BFD_RELOC_32_PCREL, R_MN10300_PCREL32, },
514 { BFD_RELOC_16_PCREL, R_MN10300_PCREL16, },
515 { BFD_RELOC_8_PCREL, R_MN10300_PCREL8, },
516 { BFD_RELOC_24, R_MN10300_24, },
517 { BFD_RELOC_VTABLE_INHERIT, R_MN10300_GNU_VTINHERIT },
518 { BFD_RELOC_VTABLE_ENTRY, R_MN10300_GNU_VTENTRY },
519 { BFD_RELOC_32_GOT_PCREL, R_MN10300_GOTPC32 },
520 { BFD_RELOC_16_GOT_PCREL, R_MN10300_GOTPC16 },
521 { BFD_RELOC_32_GOTOFF, R_MN10300_GOTOFF32 },
522 { BFD_RELOC_MN10300_GOTOFF24, R_MN10300_GOTOFF24 },
523 { BFD_RELOC_16_GOTOFF, R_MN10300_GOTOFF16 },
524 { BFD_RELOC_32_PLT_PCREL, R_MN10300_PLT32 },
525 { BFD_RELOC_16_PLT_PCREL, R_MN10300_PLT16 },
526 { BFD_RELOC_MN10300_GOT32, R_MN10300_GOT32 },
527 { BFD_RELOC_MN10300_GOT24, R_MN10300_GOT24 },
528 { BFD_RELOC_MN10300_GOT16, R_MN10300_GOT16 },
529 { BFD_RELOC_MN10300_COPY, R_MN10300_COPY },
530 { BFD_RELOC_MN10300_GLOB_DAT, R_MN10300_GLOB_DAT },
531 { BFD_RELOC_MN10300_JMP_SLOT, R_MN10300_JMP_SLOT },
532 { BFD_RELOC_MN10300_RELATIVE, R_MN10300_RELATIVE },
533 };
534
535 /* Create the GOT section. */
536
537 static bfd_boolean
538 _bfd_mn10300_elf_create_got_section (abfd, info)
539 bfd * abfd;
540 struct bfd_link_info * info;
541 {
542 flagword flags;
543 flagword pltflags;
544 asection * s;
545 struct bfd_link_hash_entry * bh;
546 struct elf_link_hash_entry * h;
547 const struct elf_backend_data * bed = get_elf_backend_data (abfd);
548 int ptralign;
549
550 /* This function may be called more than once. */
551 if (bfd_get_section_by_name (abfd, ".got") != NULL)
552 return TRUE;
553
554 switch (bed->s->arch_size)
555 {
556 case 32:
557 ptralign = 2;
558 break;
559
560 case 64:
561 ptralign = 3;
562 break;
563
564 default:
565 bfd_set_error (bfd_error_bad_value);
566 return FALSE;
567 }
568
569 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
570 | SEC_LINKER_CREATED);
571
572 pltflags = flags;
573 pltflags |= SEC_CODE;
574 if (bed->plt_not_loaded)
575 pltflags &= ~ (SEC_LOAD | SEC_HAS_CONTENTS);
576 if (bed->plt_readonly)
577 pltflags |= SEC_READONLY;
578
579 s = bfd_make_section_with_flags (abfd, ".plt", pltflags);
580 if (s == NULL
581 || ! bfd_set_section_alignment (abfd, s, bed->plt_alignment))
582 return FALSE;
583
584 if (bed->want_plt_sym)
585 {
586 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
587 .plt section. */
588 bh = NULL;
589 if (! (_bfd_generic_link_add_one_symbol
590 (info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s,
591 (bfd_vma) 0, (const char *) NULL, FALSE,
592 get_elf_backend_data (abfd)->collect, &bh)))
593 return FALSE;
594 h = (struct elf_link_hash_entry *) bh;
595 h->def_regular = 1;
596 h->type = STT_OBJECT;
597
598 if (info->shared
599 && ! bfd_elf_link_record_dynamic_symbol (info, h))
600 return FALSE;
601 }
602
603 s = bfd_make_section_with_flags (abfd, ".got", flags);
604 if (s == NULL
605 || ! bfd_set_section_alignment (abfd, s, ptralign))
606 return FALSE;
607
608 if (bed->want_got_plt)
609 {
610 s = bfd_make_section_with_flags (abfd, ".got.plt", flags);
611 if (s == NULL
612 || ! bfd_set_section_alignment (abfd, s, ptralign))
613 return FALSE;
614 }
615
616 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
617 (or .got.plt) section. We don't do this in the linker script
618 because we don't want to define the symbol if we are not creating
619 a global offset table. */
620 bh = NULL;
621 if (!(_bfd_generic_link_add_one_symbol
622 (info, abfd, "_GLOBAL_OFFSET_TABLE_", BSF_GLOBAL, s,
623 0, (const char *) NULL, FALSE, bed->collect, &bh)))
624 return FALSE;
625 h = (struct elf_link_hash_entry *) bh;
626 h->def_regular = 1;
627 h->type = STT_OBJECT;
628
629 if (info->shared
630 && ! bfd_elf_link_record_dynamic_symbol (info, h))
631 return FALSE;
632
633 elf_hash_table (info)->hgot = h;
634
635 /* The first bit of the global offset table is the header. */
636 s->size += bed->got_header_size;
637
638 return TRUE;
639 }
640
641 static reloc_howto_type *
642 bfd_elf32_bfd_reloc_type_lookup (abfd, code)
643 bfd *abfd ATTRIBUTE_UNUSED;
644 bfd_reloc_code_real_type code;
645 {
646 unsigned int i;
647
648 for (i = 0;
649 i < sizeof (mn10300_reloc_map) / sizeof (struct mn10300_reloc_map);
650 i++)
651 {
652 if (mn10300_reloc_map[i].bfd_reloc_val == code)
653 return &elf_mn10300_howto_table[mn10300_reloc_map[i].elf_reloc_val];
654 }
655
656 return NULL;
657 }
658
659 /* Set the howto pointer for an MN10300 ELF reloc. */
660
661 static void
662 mn10300_info_to_howto (abfd, cache_ptr, dst)
663 bfd *abfd ATTRIBUTE_UNUSED;
664 arelent *cache_ptr;
665 Elf_Internal_Rela *dst;
666 {
667 unsigned int r_type;
668
669 r_type = ELF32_R_TYPE (dst->r_info);
670 BFD_ASSERT (r_type < (unsigned int) R_MN10300_MAX);
671 cache_ptr->howto = &elf_mn10300_howto_table[r_type];
672 }
673
674 /* Look through the relocs for a section during the first phase.
675 Since we don't do .gots or .plts, we just need to consider the
676 virtual table relocs for gc. */
677
678 static bfd_boolean
679 mn10300_elf_check_relocs (abfd, info, sec, relocs)
680 bfd *abfd;
681 struct bfd_link_info *info;
682 asection *sec;
683 const Elf_Internal_Rela *relocs;
684 {
685 Elf_Internal_Shdr *symtab_hdr;
686 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
687 const Elf_Internal_Rela *rel;
688 const Elf_Internal_Rela *rel_end;
689 bfd * dynobj;
690 bfd_vma * local_got_offsets;
691 asection * sgot;
692 asection * srelgot;
693 asection * sreloc;
694
695 sgot = NULL;
696 srelgot = NULL;
697 sreloc = NULL;
698
699 if (info->relocatable)
700 return TRUE;
701
702 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
703 sym_hashes = elf_sym_hashes (abfd);
704 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym);
705 if (!elf_bad_symtab (abfd))
706 sym_hashes_end -= symtab_hdr->sh_info;
707
708 dynobj = elf_hash_table (info)->dynobj;
709 local_got_offsets = elf_local_got_offsets (abfd);
710 rel_end = relocs + sec->reloc_count;
711 for (rel = relocs; rel < rel_end; rel++)
712 {
713 struct elf_link_hash_entry *h;
714 unsigned long r_symndx;
715
716 r_symndx = ELF32_R_SYM (rel->r_info);
717 if (r_symndx < symtab_hdr->sh_info)
718 h = NULL;
719 else
720 {
721 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
722 while (h->root.type == bfd_link_hash_indirect
723 || h->root.type == bfd_link_hash_warning)
724 h = (struct elf_link_hash_entry *) h->root.u.i.link;
725 }
726
727 /* Some relocs require a global offset table. */
728 if (dynobj == NULL)
729 {
730 switch (ELF32_R_TYPE (rel->r_info))
731 {
732 case R_MN10300_GOT32:
733 case R_MN10300_GOT24:
734 case R_MN10300_GOT16:
735 case R_MN10300_GOTOFF32:
736 case R_MN10300_GOTOFF24:
737 case R_MN10300_GOTOFF16:
738 case R_MN10300_GOTPC32:
739 case R_MN10300_GOTPC16:
740 elf_hash_table (info)->dynobj = dynobj = abfd;
741 if (! _bfd_mn10300_elf_create_got_section (dynobj, info))
742 return FALSE;
743 break;
744
745 default:
746 break;
747 }
748 }
749
750 switch (ELF32_R_TYPE (rel->r_info))
751 {
752 /* This relocation describes the C++ object vtable hierarchy.
753 Reconstruct it for later use during GC. */
754 case R_MN10300_GNU_VTINHERIT:
755 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
756 return FALSE;
757 break;
758
759 /* This relocation describes which C++ vtable entries are actually
760 used. Record for later use during GC. */
761 case R_MN10300_GNU_VTENTRY:
762 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
763 return FALSE;
764 break;
765 case R_MN10300_GOT32:
766 case R_MN10300_GOT24:
767 case R_MN10300_GOT16:
768 /* This symbol requires a global offset table entry. */
769
770 if (sgot == NULL)
771 {
772 sgot = bfd_get_section_by_name (dynobj, ".got");
773 BFD_ASSERT (sgot != NULL);
774 }
775
776 if (srelgot == NULL
777 && (h != NULL || info->shared))
778 {
779 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
780 if (srelgot == NULL)
781 {
782 srelgot = bfd_make_section_with_flags (dynobj,
783 ".rela.got",
784 (SEC_ALLOC
785 | SEC_LOAD
786 | SEC_HAS_CONTENTS
787 | SEC_IN_MEMORY
788 | SEC_LINKER_CREATED
789 | SEC_READONLY));
790 if (srelgot == NULL
791 || ! bfd_set_section_alignment (dynobj, srelgot, 2))
792 return FALSE;
793 }
794 }
795
796 if (h != NULL)
797 {
798 if (h->got.offset != (bfd_vma) -1)
799 /* We have already allocated space in the .got. */
800 break;
801
802 h->got.offset = sgot->size;
803
804 /* Make sure this symbol is output as a dynamic symbol. */
805 if (h->dynindx == -1)
806 {
807 if (! bfd_elf_link_record_dynamic_symbol (info, h))
808 return FALSE;
809 }
810
811 srelgot->size += sizeof (Elf32_External_Rela);
812 }
813 else
814 {
815 /* This is a global offset table entry for a local
816 symbol. */
817 if (local_got_offsets == NULL)
818 {
819 size_t size;
820 unsigned int i;
821
822 size = symtab_hdr->sh_info * sizeof (bfd_vma);
823 local_got_offsets = (bfd_vma *) bfd_alloc (abfd, size);
824
825 if (local_got_offsets == NULL)
826 return FALSE;
827 elf_local_got_offsets (abfd) = local_got_offsets;
828
829 for (i = 0; i < symtab_hdr->sh_info; i++)
830 local_got_offsets[i] = (bfd_vma) -1;
831 }
832
833 if (local_got_offsets[r_symndx] != (bfd_vma) -1)
834 /* We have already allocated space in the .got. */
835 break;
836
837 local_got_offsets[r_symndx] = sgot->size;
838
839 if (info->shared)
840 /* If we are generating a shared object, we need to
841 output a R_MN10300_RELATIVE reloc so that the dynamic
842 linker can adjust this GOT entry. */
843 srelgot->size += sizeof (Elf32_External_Rela);
844 }
845
846 sgot->size += 4;
847
848 break;
849
850 case R_MN10300_PLT32:
851 case R_MN10300_PLT16:
852 /* This symbol requires a procedure linkage table entry. We
853 actually build the entry in adjust_dynamic_symbol,
854 because this might be a case of linking PIC code which is
855 never referenced by a dynamic object, in which case we
856 don't need to generate a procedure linkage table entry
857 after all. */
858
859 /* If this is a local symbol, we resolve it directly without
860 creating a procedure linkage table entry. */
861 if (h == NULL)
862 continue;
863
864 if (ELF_ST_VISIBILITY (h->other) == STV_INTERNAL
865 || ELF_ST_VISIBILITY (h->other) == STV_HIDDEN)
866 break;
867
868 h->needs_plt = 1;
869
870 break;
871
872 case R_MN10300_24:
873 case R_MN10300_16:
874 case R_MN10300_8:
875 case R_MN10300_PCREL32:
876 case R_MN10300_PCREL16:
877 case R_MN10300_PCREL8:
878 if (h != NULL)
879 h->non_got_ref = 1;
880 break;
881
882 case R_MN10300_32:
883 if (h != NULL)
884 h->non_got_ref = 1;
885
886 /* If we are creating a shared library, then we need to copy
887 the reloc into the shared library. */
888 if (info->shared
889 && (sec->flags & SEC_ALLOC) != 0)
890 {
891 /* When creating a shared object, we must copy these
892 reloc types into the output file. We create a reloc
893 section in dynobj and make room for this reloc. */
894 if (sreloc == NULL)
895 {
896 const char * name;
897
898 name = (bfd_elf_string_from_elf_section
899 (abfd,
900 elf_elfheader (abfd)->e_shstrndx,
901 elf_section_data (sec)->rel_hdr.sh_name));
902 if (name == NULL)
903 return FALSE;
904
905 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
906 && strcmp (bfd_get_section_name (abfd, sec),
907 name + 5) == 0);
908
909 sreloc = bfd_get_section_by_name (dynobj, name);
910 if (sreloc == NULL)
911 {
912 flagword flags;
913
914 flags = (SEC_HAS_CONTENTS | SEC_READONLY
915 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
916 if ((sec->flags & SEC_ALLOC) != 0)
917 flags |= SEC_ALLOC | SEC_LOAD;
918 sreloc = bfd_make_section_with_flags (dynobj,
919 name,
920 flags);
921 if (sreloc == NULL
922 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
923 return FALSE;
924 }
925 }
926
927 sreloc->size += sizeof (Elf32_External_Rela);
928 }
929
930 break;
931 }
932 }
933
934 return TRUE;
935 }
936
937 /* Return the section that should be marked against GC for a given
938 relocation. */
939
940 static asection *
941 mn10300_elf_gc_mark_hook (sec, info, rel, h, sym)
942 asection *sec;
943 struct bfd_link_info *info ATTRIBUTE_UNUSED;
944 Elf_Internal_Rela *rel;
945 struct elf_link_hash_entry *h;
946 Elf_Internal_Sym *sym;
947 {
948 if (h != NULL)
949 {
950 switch (ELF32_R_TYPE (rel->r_info))
951 {
952 case R_MN10300_GNU_VTINHERIT:
953 case R_MN10300_GNU_VTENTRY:
954 break;
955
956 default:
957 switch (h->root.type)
958 {
959 case bfd_link_hash_defined:
960 case bfd_link_hash_defweak:
961 return h->root.u.def.section;
962
963 case bfd_link_hash_common:
964 return h->root.u.c.p->section;
965
966 default:
967 break;
968 }
969 }
970 }
971 else
972 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
973
974 return NULL;
975 }
976
977 /* Perform a relocation as part of a final link. */
978 static bfd_reloc_status_type
979 mn10300_elf_final_link_relocate (howto, input_bfd, output_bfd,
980 input_section, contents, offset, value,
981 addend, h, symndx, info, sym_sec, is_local)
982 reloc_howto_type *howto;
983 bfd *input_bfd;
984 bfd *output_bfd ATTRIBUTE_UNUSED;
985 asection *input_section;
986 bfd_byte *contents;
987 bfd_vma offset;
988 bfd_vma value;
989 bfd_vma addend;
990 struct elf_link_hash_entry * h;
991 unsigned long symndx;
992 struct bfd_link_info *info;
993 asection *sym_sec ATTRIBUTE_UNUSED;
994 int is_local ATTRIBUTE_UNUSED;
995 {
996 unsigned long r_type = howto->type;
997 bfd_byte *hit_data = contents + offset;
998 bfd * dynobj;
999 bfd_vma * local_got_offsets;
1000 asection * sgot;
1001 asection * splt;
1002 asection * sreloc;
1003
1004 dynobj = elf_hash_table (info)->dynobj;
1005 local_got_offsets = elf_local_got_offsets (input_bfd);
1006
1007 sgot = NULL;
1008 splt = NULL;
1009 sreloc = NULL;
1010
1011 switch (r_type)
1012 {
1013 case R_MN10300_24:
1014 case R_MN10300_16:
1015 case R_MN10300_8:
1016 case R_MN10300_PCREL8:
1017 case R_MN10300_PCREL16:
1018 case R_MN10300_PCREL32:
1019 case R_MN10300_GOTOFF32:
1020 case R_MN10300_GOTOFF24:
1021 case R_MN10300_GOTOFF16:
1022 if (info->shared
1023 && (input_section->flags & SEC_ALLOC) != 0
1024 && h != NULL
1025 && ! SYMBOL_REFERENCES_LOCAL (info, h))
1026 return bfd_reloc_dangerous;
1027 }
1028
1029 switch (r_type)
1030 {
1031 case R_MN10300_NONE:
1032 return bfd_reloc_ok;
1033
1034 case R_MN10300_32:
1035 if (info->shared
1036 && (input_section->flags & SEC_ALLOC) != 0)
1037 {
1038 Elf_Internal_Rela outrel;
1039 bfd_boolean skip, relocate;
1040
1041 /* When generating a shared object, these relocations are
1042 copied into the output file to be resolved at run
1043 time. */
1044 if (sreloc == NULL)
1045 {
1046 const char * name;
1047
1048 name = (bfd_elf_string_from_elf_section
1049 (input_bfd,
1050 elf_elfheader (input_bfd)->e_shstrndx,
1051 elf_section_data (input_section)->rel_hdr.sh_name));
1052 if (name == NULL)
1053 return FALSE;
1054
1055 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
1056 && strcmp (bfd_get_section_name (input_bfd,
1057 input_section),
1058 name + 5) == 0);
1059
1060 sreloc = bfd_get_section_by_name (dynobj, name);
1061 BFD_ASSERT (sreloc != NULL);
1062 }
1063
1064 skip = FALSE;
1065
1066 outrel.r_offset = _bfd_elf_section_offset (input_bfd, info,
1067 input_section, offset);
1068 if (outrel.r_offset == (bfd_vma) -1)
1069 skip = TRUE;
1070
1071 outrel.r_offset += (input_section->output_section->vma
1072 + input_section->output_offset);
1073
1074 if (skip)
1075 {
1076 memset (&outrel, 0, sizeof outrel);
1077 relocate = FALSE;
1078 }
1079 else
1080 {
1081 /* h->dynindx may be -1 if this symbol was marked to
1082 become local. */
1083 if (h == NULL
1084 || SYMBOL_REFERENCES_LOCAL (info, h))
1085 {
1086 relocate = TRUE;
1087 outrel.r_info = ELF32_R_INFO (0, R_MN10300_RELATIVE);
1088 outrel.r_addend = value + addend;
1089 }
1090 else
1091 {
1092 BFD_ASSERT (h->dynindx != -1);
1093 relocate = FALSE;
1094 outrel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_32);
1095 outrel.r_addend = value + addend;
1096 }
1097 }
1098
1099 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
1100 (bfd_byte *) (((Elf32_External_Rela *) sreloc->contents)
1101 + sreloc->reloc_count));
1102 ++sreloc->reloc_count;
1103
1104 /* If this reloc is against an external symbol, we do
1105 not want to fiddle with the addend. Otherwise, we
1106 need to include the symbol value so that it becomes
1107 an addend for the dynamic reloc. */
1108 if (! relocate)
1109 return bfd_reloc_ok;
1110 }
1111 value += addend;
1112 bfd_put_32 (input_bfd, value, hit_data);
1113 return bfd_reloc_ok;
1114
1115 case R_MN10300_24:
1116 value += addend;
1117
1118 if ((long) value > 0x7fffff || (long) value < -0x800000)
1119 return bfd_reloc_overflow;
1120
1121 bfd_put_8 (input_bfd, value & 0xff, hit_data);
1122 bfd_put_8 (input_bfd, (value >> 8) & 0xff, hit_data + 1);
1123 bfd_put_8 (input_bfd, (value >> 16) & 0xff, hit_data + 2);
1124 return bfd_reloc_ok;
1125
1126 case R_MN10300_16:
1127 value += addend;
1128
1129 if ((long) value > 0x7fff || (long) value < -0x8000)
1130 return bfd_reloc_overflow;
1131
1132 bfd_put_16 (input_bfd, value, hit_data);
1133 return bfd_reloc_ok;
1134
1135 case R_MN10300_8:
1136 value += addend;
1137
1138 if ((long) value > 0x7f || (long) value < -0x80)
1139 return bfd_reloc_overflow;
1140
1141 bfd_put_8 (input_bfd, value, hit_data);
1142 return bfd_reloc_ok;
1143
1144 case R_MN10300_PCREL8:
1145 value -= (input_section->output_section->vma
1146 + input_section->output_offset);
1147 value -= offset;
1148 value += addend;
1149
1150 if ((long) value > 0xff || (long) value < -0x100)
1151 return bfd_reloc_overflow;
1152
1153 bfd_put_8 (input_bfd, value, hit_data);
1154 return bfd_reloc_ok;
1155
1156 case R_MN10300_PCREL16:
1157 value -= (input_section->output_section->vma
1158 + input_section->output_offset);
1159 value -= offset;
1160 value += addend;
1161
1162 if ((long) value > 0xffff || (long) value < -0x10000)
1163 return bfd_reloc_overflow;
1164
1165 bfd_put_16 (input_bfd, value, hit_data);
1166 return bfd_reloc_ok;
1167
1168 case R_MN10300_PCREL32:
1169 value -= (input_section->output_section->vma
1170 + input_section->output_offset);
1171 value -= offset;
1172 value += addend;
1173
1174 bfd_put_32 (input_bfd, value, hit_data);
1175 return bfd_reloc_ok;
1176
1177 case R_MN10300_GNU_VTINHERIT:
1178 case R_MN10300_GNU_VTENTRY:
1179 return bfd_reloc_ok;
1180
1181 case R_MN10300_GOTPC32:
1182 /* Use global offset table as symbol value. */
1183
1184 value = bfd_get_section_by_name (dynobj,
1185 ".got")->output_section->vma;
1186 value -= (input_section->output_section->vma
1187 + input_section->output_offset);
1188 value -= offset;
1189 value += addend;
1190
1191 bfd_put_32 (input_bfd, value, hit_data);
1192 return bfd_reloc_ok;
1193
1194 case R_MN10300_GOTPC16:
1195 /* Use global offset table as symbol value. */
1196
1197 value = bfd_get_section_by_name (dynobj,
1198 ".got")->output_section->vma;
1199 value -= (input_section->output_section->vma
1200 + input_section->output_offset);
1201 value -= offset;
1202 value += addend;
1203
1204 if ((long) value > 0xffff || (long) value < -0x10000)
1205 return bfd_reloc_overflow;
1206
1207 bfd_put_16 (input_bfd, value, hit_data);
1208 return bfd_reloc_ok;
1209
1210 case R_MN10300_GOTOFF32:
1211 value -= bfd_get_section_by_name (dynobj,
1212 ".got")->output_section->vma;
1213 value += addend;
1214
1215 bfd_put_32 (input_bfd, value, hit_data);
1216 return bfd_reloc_ok;
1217
1218 case R_MN10300_GOTOFF24:
1219 value -= bfd_get_section_by_name (dynobj,
1220 ".got")->output_section->vma;
1221 value += addend;
1222
1223 if ((long) value > 0x7fffff || (long) value < -0x800000)
1224 return bfd_reloc_overflow;
1225
1226 bfd_put_8 (input_bfd, value, hit_data);
1227 bfd_put_8 (input_bfd, (value >> 8) & 0xff, hit_data + 1);
1228 bfd_put_8 (input_bfd, (value >> 16) & 0xff, hit_data + 2);
1229 return bfd_reloc_ok;
1230
1231 case R_MN10300_GOTOFF16:
1232 value -= bfd_get_section_by_name (dynobj,
1233 ".got")->output_section->vma;
1234 value += addend;
1235
1236 if ((long) value > 0xffff || (long) value < -0x10000)
1237 return bfd_reloc_overflow;
1238
1239 bfd_put_16 (input_bfd, value, hit_data);
1240 return bfd_reloc_ok;
1241
1242 case R_MN10300_PLT32:
1243 if (h != NULL
1244 && ELF_ST_VISIBILITY (h->other) != STV_INTERNAL
1245 && ELF_ST_VISIBILITY (h->other) != STV_HIDDEN
1246 && h->plt.offset != (bfd_vma) -1)
1247 {
1248 asection * splt;
1249
1250 splt = bfd_get_section_by_name (dynobj, ".plt");
1251
1252 value = (splt->output_section->vma
1253 + splt->output_offset
1254 + h->plt.offset) - value;
1255 }
1256
1257 value -= (input_section->output_section->vma
1258 + input_section->output_offset);
1259 value -= offset;
1260 value += addend;
1261
1262 bfd_put_32 (input_bfd, value, hit_data);
1263 return bfd_reloc_ok;
1264
1265 case R_MN10300_PLT16:
1266 if (h != NULL
1267 && ELF_ST_VISIBILITY (h->other) != STV_INTERNAL
1268 && ELF_ST_VISIBILITY (h->other) != STV_HIDDEN
1269 && h->plt.offset != (bfd_vma) -1)
1270 {
1271 asection * splt;
1272
1273 splt = bfd_get_section_by_name (dynobj, ".plt");
1274
1275 value = (splt->output_section->vma
1276 + splt->output_offset
1277 + h->plt.offset) - value;
1278 }
1279
1280 value -= (input_section->output_section->vma
1281 + input_section->output_offset);
1282 value -= offset;
1283 value += addend;
1284
1285 if ((long) value > 0xffff || (long) value < -0x10000)
1286 return bfd_reloc_overflow;
1287
1288 bfd_put_16 (input_bfd, value, hit_data);
1289 return bfd_reloc_ok;
1290
1291 case R_MN10300_GOT32:
1292 case R_MN10300_GOT24:
1293 case R_MN10300_GOT16:
1294 {
1295 asection * sgot;
1296
1297 sgot = bfd_get_section_by_name (dynobj, ".got");
1298
1299 if (h != NULL)
1300 {
1301 bfd_vma off;
1302
1303 off = h->got.offset;
1304 BFD_ASSERT (off != (bfd_vma) -1);
1305
1306 if (! elf_hash_table (info)->dynamic_sections_created
1307 || SYMBOL_REFERENCES_LOCAL (info, h))
1308 /* This is actually a static link, or it is a
1309 -Bsymbolic link and the symbol is defined
1310 locally, or the symbol was forced to be local
1311 because of a version file. We must initialize
1312 this entry in the global offset table.
1313
1314 When doing a dynamic link, we create a .rela.got
1315 relocation entry to initialize the value. This
1316 is done in the finish_dynamic_symbol routine. */
1317 bfd_put_32 (output_bfd, value,
1318 sgot->contents + off);
1319
1320 value = sgot->output_offset + off;
1321 }
1322 else
1323 {
1324 bfd_vma off;
1325
1326 off = elf_local_got_offsets (input_bfd)[symndx];
1327
1328 bfd_put_32 (output_bfd, value, sgot->contents + off);
1329
1330 if (info->shared)
1331 {
1332 asection * srelgot;
1333 Elf_Internal_Rela outrel;
1334
1335 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1336 BFD_ASSERT (srelgot != NULL);
1337
1338 outrel.r_offset = (sgot->output_section->vma
1339 + sgot->output_offset
1340 + off);
1341 outrel.r_info = ELF32_R_INFO (0, R_MN10300_RELATIVE);
1342 outrel.r_addend = value;
1343 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
1344 (bfd_byte *) (((Elf32_External_Rela *)
1345 srelgot->contents)
1346 + srelgot->reloc_count));
1347 ++ srelgot->reloc_count;
1348 }
1349
1350 value = sgot->output_offset + off;
1351 }
1352 }
1353
1354 value += addend;
1355
1356 if (r_type == R_MN10300_GOT32)
1357 {
1358 bfd_put_32 (input_bfd, value, hit_data);
1359 return bfd_reloc_ok;
1360 }
1361 else if (r_type == R_MN10300_GOT24)
1362 {
1363 if ((long) value > 0x7fffff || (long) value < -0x800000)
1364 return bfd_reloc_overflow;
1365
1366 bfd_put_8 (input_bfd, value & 0xff, hit_data);
1367 bfd_put_8 (input_bfd, (value >> 8) & 0xff, hit_data + 1);
1368 bfd_put_8 (input_bfd, (value >> 16) & 0xff, hit_data + 2);
1369 return bfd_reloc_ok;
1370 }
1371 else if (r_type == R_MN10300_GOT16)
1372 {
1373 if ((long) value > 0xffff || (long) value < -0x10000)
1374 return bfd_reloc_overflow;
1375
1376 bfd_put_16 (input_bfd, value, hit_data);
1377 return bfd_reloc_ok;
1378 }
1379 /* Fall through. */
1380
1381 default:
1382 return bfd_reloc_notsupported;
1383 }
1384 }
1385 \f
1386 /* Relocate an MN10300 ELF section. */
1387 static bfd_boolean
1388 mn10300_elf_relocate_section (output_bfd, info, input_bfd, input_section,
1389 contents, relocs, local_syms, local_sections)
1390 bfd *output_bfd;
1391 struct bfd_link_info *info;
1392 bfd *input_bfd;
1393 asection *input_section;
1394 bfd_byte *contents;
1395 Elf_Internal_Rela *relocs;
1396 Elf_Internal_Sym *local_syms;
1397 asection **local_sections;
1398 {
1399 Elf_Internal_Shdr *symtab_hdr;
1400 struct elf_link_hash_entry **sym_hashes;
1401 Elf_Internal_Rela *rel, *relend;
1402
1403 if (info->relocatable)
1404 return TRUE;
1405
1406 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1407 sym_hashes = elf_sym_hashes (input_bfd);
1408
1409 rel = relocs;
1410 relend = relocs + input_section->reloc_count;
1411 for (; rel < relend; rel++)
1412 {
1413 int r_type;
1414 reloc_howto_type *howto;
1415 unsigned long r_symndx;
1416 Elf_Internal_Sym *sym;
1417 asection *sec;
1418 struct elf32_mn10300_link_hash_entry *h;
1419 bfd_vma relocation;
1420 bfd_reloc_status_type r;
1421
1422 r_symndx = ELF32_R_SYM (rel->r_info);
1423 r_type = ELF32_R_TYPE (rel->r_info);
1424 howto = elf_mn10300_howto_table + r_type;
1425
1426 /* Just skip the vtable gc relocs. */
1427 if (r_type == R_MN10300_GNU_VTINHERIT
1428 || r_type == R_MN10300_GNU_VTENTRY)
1429 continue;
1430
1431 h = NULL;
1432 sym = NULL;
1433 sec = NULL;
1434 if (r_symndx < symtab_hdr->sh_info)
1435 {
1436 sym = local_syms + r_symndx;
1437 sec = local_sections[r_symndx];
1438 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1439 }
1440 else
1441 {
1442 bfd_boolean unresolved_reloc;
1443 bfd_boolean warned;
1444 struct elf_link_hash_entry *hh;
1445
1446 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1447 r_symndx, symtab_hdr, sym_hashes,
1448 hh, sec, relocation,
1449 unresolved_reloc, warned);
1450
1451 h = (struct elf32_mn10300_link_hash_entry *) hh;
1452
1453 if ((h->root.root.type == bfd_link_hash_defined
1454 || h->root.root.type == bfd_link_hash_defweak)
1455 && ( r_type == R_MN10300_GOTPC32
1456 || r_type == R_MN10300_GOTPC16
1457 || (( r_type == R_MN10300_PLT32
1458 || r_type == R_MN10300_PLT16)
1459 && ELF_ST_VISIBILITY (h->root.other) != STV_INTERNAL
1460 && ELF_ST_VISIBILITY (h->root.other) != STV_HIDDEN
1461 && h->root.plt.offset != (bfd_vma) -1)
1462 || (( r_type == R_MN10300_GOT32
1463 || r_type == R_MN10300_GOT24
1464 || r_type == R_MN10300_GOT16)
1465 && elf_hash_table (info)->dynamic_sections_created
1466 && !SYMBOL_REFERENCES_LOCAL (info, hh))
1467 || (r_type == R_MN10300_32
1468 && !SYMBOL_REFERENCES_LOCAL (info, hh)
1469 && ((input_section->flags & SEC_ALLOC) != 0
1470 /* DWARF will emit R_MN10300_32 relocations
1471 in its sections against symbols defined
1472 externally in shared libraries. We can't
1473 do anything with them here. */
1474 || ((input_section->flags & SEC_DEBUGGING) != 0
1475 && h->root.def_dynamic)))))
1476 /* In these cases, we don't need the relocation
1477 value. We check specially because in some
1478 obscure cases sec->output_section will be NULL. */
1479 relocation = 0;
1480
1481 else if (unresolved_reloc)
1482 (*_bfd_error_handler)
1483 (_("%s: warning: unresolvable relocation against symbol `%s' from %s section"),
1484 bfd_get_filename (input_bfd), h->root.root.root.string,
1485 bfd_get_section_name (input_bfd, input_section));
1486 }
1487
1488 r = mn10300_elf_final_link_relocate (howto, input_bfd, output_bfd,
1489 input_section,
1490 contents, rel->r_offset,
1491 relocation, rel->r_addend,
1492 (struct elf_link_hash_entry *)h,
1493 r_symndx,
1494 info, sec, h == NULL);
1495
1496 if (r != bfd_reloc_ok)
1497 {
1498 const char *name;
1499 const char *msg = (const char *) 0;
1500
1501 if (h != NULL)
1502 name = h->root.root.root.string;
1503 else
1504 {
1505 name = (bfd_elf_string_from_elf_section
1506 (input_bfd, symtab_hdr->sh_link, sym->st_name));
1507 if (name == NULL || *name == '\0')
1508 name = bfd_section_name (input_bfd, sec);
1509 }
1510
1511 switch (r)
1512 {
1513 case bfd_reloc_overflow:
1514 if (! ((*info->callbacks->reloc_overflow)
1515 (info, (h ? &h->root.root : NULL), name,
1516 howto->name, (bfd_vma) 0, input_bfd,
1517 input_section, rel->r_offset)))
1518 return FALSE;
1519 break;
1520
1521 case bfd_reloc_undefined:
1522 if (! ((*info->callbacks->undefined_symbol)
1523 (info, name, input_bfd, input_section,
1524 rel->r_offset, TRUE)))
1525 return FALSE;
1526 break;
1527
1528 case bfd_reloc_outofrange:
1529 msg = _("internal error: out of range error");
1530 goto common_error;
1531
1532 case bfd_reloc_notsupported:
1533 msg = _("internal error: unsupported relocation error");
1534 goto common_error;
1535
1536 case bfd_reloc_dangerous:
1537 msg = _("internal error: dangerous error");
1538 goto common_error;
1539
1540 default:
1541 msg = _("internal error: unknown error");
1542 /* fall through */
1543
1544 common_error:
1545 if (!((*info->callbacks->warning)
1546 (info, msg, name, input_bfd, input_section,
1547 rel->r_offset)))
1548 return FALSE;
1549 break;
1550 }
1551 }
1552 }
1553
1554 return TRUE;
1555 }
1556
1557 /* Finish initializing one hash table entry. */
1558 static bfd_boolean
1559 elf32_mn10300_finish_hash_table_entry (gen_entry, in_args)
1560 struct bfd_hash_entry *gen_entry;
1561 PTR in_args;
1562 {
1563 struct elf32_mn10300_link_hash_entry *entry;
1564 struct bfd_link_info *link_info = (struct bfd_link_info *)in_args;
1565 unsigned int byte_count = 0;
1566
1567 entry = (struct elf32_mn10300_link_hash_entry *) gen_entry;
1568
1569 if (entry->root.root.type == bfd_link_hash_warning)
1570 entry = (struct elf32_mn10300_link_hash_entry *) entry->root.root.u.i.link;
1571
1572 /* If we already know we want to convert "call" to "calls" for calls
1573 to this symbol, then return now. */
1574 if (entry->flags == MN10300_CONVERT_CALL_TO_CALLS)
1575 return TRUE;
1576
1577 /* If there are no named calls to this symbol, or there's nothing we
1578 can move from the function itself into the "call" instruction,
1579 then note that all "call" instructions should be converted into
1580 "calls" instructions and return. If a symbol is available for
1581 dynamic symbol resolution (overridable or overriding), avoid
1582 custom calling conventions. */
1583 if (entry->direct_calls == 0
1584 || (entry->stack_size == 0 && entry->movm_args == 0)
1585 || (elf_hash_table (link_info)->dynamic_sections_created
1586 && ELF_ST_VISIBILITY (entry->root.other) != STV_INTERNAL
1587 && ELF_ST_VISIBILITY (entry->root.other) != STV_HIDDEN))
1588 {
1589 /* Make a note that we should convert "call" instructions to "calls"
1590 instructions for calls to this symbol. */
1591 entry->flags |= MN10300_CONVERT_CALL_TO_CALLS;
1592 return TRUE;
1593 }
1594
1595 /* We may be able to move some instructions from the function itself into
1596 the "call" instruction. Count how many bytes we might be able to
1597 eliminate in the function itself. */
1598
1599 /* A movm instruction is two bytes. */
1600 if (entry->movm_args)
1601 byte_count += 2;
1602
1603 /* Count the insn to allocate stack space too. */
1604 if (entry->stack_size > 0)
1605 {
1606 if (entry->stack_size <= 128)
1607 byte_count += 3;
1608 else
1609 byte_count += 4;
1610 }
1611
1612 /* If using "call" will result in larger code, then turn all
1613 the associated "call" instructions into "calls" instructions. */
1614 if (byte_count < entry->direct_calls)
1615 entry->flags |= MN10300_CONVERT_CALL_TO_CALLS;
1616
1617 /* This routine never fails. */
1618 return TRUE;
1619 }
1620
1621 /* This function handles relaxing for the mn10300.
1622
1623 There are quite a few relaxing opportunities available on the mn10300:
1624
1625 * calls:32 -> calls:16 2 bytes
1626 * call:32 -> call:16 2 bytes
1627
1628 * call:32 -> calls:32 1 byte
1629 * call:16 -> calls:16 1 byte
1630 * These are done anytime using "calls" would result
1631 in smaller code, or when necessary to preserve the
1632 meaning of the program.
1633
1634 * call:32 varies
1635 * call:16
1636 * In some circumstances we can move instructions
1637 from a function prologue into a "call" instruction.
1638 This is only done if the resulting code is no larger
1639 than the original code.
1640
1641 * jmp:32 -> jmp:16 2 bytes
1642 * jmp:16 -> bra:8 1 byte
1643
1644 * If the previous instruction is a conditional branch
1645 around the jump/bra, we may be able to reverse its condition
1646 and change its target to the jump's target. The jump/bra
1647 can then be deleted. 2 bytes
1648
1649 * mov abs32 -> mov abs16 1 or 2 bytes
1650
1651 * Most instructions which accept imm32 can relax to imm16 1 or 2 bytes
1652 - Most instructions which accept imm16 can relax to imm8 1 or 2 bytes
1653
1654 * Most instructions which accept d32 can relax to d16 1 or 2 bytes
1655 - Most instructions which accept d16 can relax to d8 1 or 2 bytes
1656
1657 We don't handle imm16->imm8 or d16->d8 as they're very rare
1658 and somewhat more difficult to support. */
1659
1660 static bfd_boolean
1661 mn10300_elf_relax_section (abfd, sec, link_info, again)
1662 bfd *abfd;
1663 asection *sec;
1664 struct bfd_link_info *link_info;
1665 bfd_boolean *again;
1666 {
1667 Elf_Internal_Shdr *symtab_hdr;
1668 Elf_Internal_Rela *internal_relocs = NULL;
1669 Elf_Internal_Rela *irel, *irelend;
1670 bfd_byte *contents = NULL;
1671 Elf_Internal_Sym *isymbuf = NULL;
1672 struct elf32_mn10300_link_hash_table *hash_table;
1673 asection *section = sec;
1674
1675 /* Assume nothing changes. */
1676 *again = FALSE;
1677
1678 /* We need a pointer to the mn10300 specific hash table. */
1679 hash_table = elf32_mn10300_hash_table (link_info);
1680
1681 /* Initialize fields in each hash table entry the first time through. */
1682 if ((hash_table->flags & MN10300_HASH_ENTRIES_INITIALIZED) == 0)
1683 {
1684 bfd *input_bfd;
1685
1686 /* Iterate over all the input bfds. */
1687 for (input_bfd = link_info->input_bfds;
1688 input_bfd != NULL;
1689 input_bfd = input_bfd->link_next)
1690 {
1691 /* We're going to need all the symbols for each bfd. */
1692 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1693 if (symtab_hdr->sh_info != 0)
1694 {
1695 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1696 if (isymbuf == NULL)
1697 isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
1698 symtab_hdr->sh_info, 0,
1699 NULL, NULL, NULL);
1700 if (isymbuf == NULL)
1701 goto error_return;
1702 }
1703
1704 /* Iterate over each section in this bfd. */
1705 for (section = input_bfd->sections;
1706 section != NULL;
1707 section = section->next)
1708 {
1709 struct elf32_mn10300_link_hash_entry *hash;
1710 Elf_Internal_Sym *sym;
1711 asection *sym_sec = NULL;
1712 const char *sym_name;
1713 char *new_name;
1714
1715 /* If there's nothing to do in this section, skip it. */
1716 if (! (((section->flags & SEC_RELOC) != 0
1717 && section->reloc_count != 0)
1718 || (section->flags & SEC_CODE) != 0))
1719 continue;
1720
1721 /* Get cached copy of section contents if it exists. */
1722 if (elf_section_data (section)->this_hdr.contents != NULL)
1723 contents = elf_section_data (section)->this_hdr.contents;
1724 else if (section->size != 0)
1725 {
1726 /* Go get them off disk. */
1727 if (!bfd_malloc_and_get_section (input_bfd, section,
1728 &contents))
1729 goto error_return;
1730 }
1731 else
1732 contents = NULL;
1733
1734 /* If there aren't any relocs, then there's nothing to do. */
1735 if ((section->flags & SEC_RELOC) != 0
1736 && section->reloc_count != 0)
1737 {
1738
1739 /* Get a copy of the native relocations. */
1740 internal_relocs = (_bfd_elf_link_read_relocs
1741 (input_bfd, section, (PTR) NULL,
1742 (Elf_Internal_Rela *) NULL,
1743 link_info->keep_memory));
1744 if (internal_relocs == NULL)
1745 goto error_return;
1746
1747 /* Now examine each relocation. */
1748 irel = internal_relocs;
1749 irelend = irel + section->reloc_count;
1750 for (; irel < irelend; irel++)
1751 {
1752 long r_type;
1753 unsigned long r_index;
1754 unsigned char code;
1755
1756 r_type = ELF32_R_TYPE (irel->r_info);
1757 r_index = ELF32_R_SYM (irel->r_info);
1758
1759 if (r_type < 0 || r_type >= (int) R_MN10300_MAX)
1760 goto error_return;
1761
1762 /* We need the name and hash table entry of the target
1763 symbol! */
1764 hash = NULL;
1765 sym = NULL;
1766 sym_sec = NULL;
1767
1768 if (r_index < symtab_hdr->sh_info)
1769 {
1770 /* A local symbol. */
1771 Elf_Internal_Sym *isym;
1772 struct elf_link_hash_table *elftab;
1773 bfd_size_type amt;
1774
1775 isym = isymbuf + r_index;
1776 if (isym->st_shndx == SHN_UNDEF)
1777 sym_sec = bfd_und_section_ptr;
1778 else if (isym->st_shndx == SHN_ABS)
1779 sym_sec = bfd_abs_section_ptr;
1780 else if (isym->st_shndx == SHN_COMMON)
1781 sym_sec = bfd_com_section_ptr;
1782 else
1783 sym_sec
1784 = bfd_section_from_elf_index (input_bfd,
1785 isym->st_shndx);
1786
1787 sym_name
1788 = bfd_elf_string_from_elf_section (input_bfd,
1789 (symtab_hdr
1790 ->sh_link),
1791 isym->st_name);
1792
1793 /* If it isn't a function, then we don't care
1794 about it. */
1795 if (ELF_ST_TYPE (isym->st_info) != STT_FUNC)
1796 continue;
1797
1798 /* Tack on an ID so we can uniquely identify this
1799 local symbol in the global hash table. */
1800 amt = strlen (sym_name) + 10;
1801 new_name = bfd_malloc (amt);
1802 if (new_name == 0)
1803 goto error_return;
1804
1805 sprintf (new_name, "%s_%08x", sym_name, sym_sec->id);
1806 sym_name = new_name;
1807
1808 elftab = &hash_table->static_hash_table->root;
1809 hash = ((struct elf32_mn10300_link_hash_entry *)
1810 elf_link_hash_lookup (elftab, sym_name,
1811 TRUE, TRUE, FALSE));
1812 free (new_name);
1813 }
1814 else
1815 {
1816 r_index -= symtab_hdr->sh_info;
1817 hash = (struct elf32_mn10300_link_hash_entry *)
1818 elf_sym_hashes (input_bfd)[r_index];
1819 }
1820
1821 /* If this is not a "call" instruction, then we
1822 should convert "call" instructions to "calls"
1823 instructions. */
1824 code = bfd_get_8 (input_bfd,
1825 contents + irel->r_offset - 1);
1826 if (code != 0xdd && code != 0xcd)
1827 hash->flags |= MN10300_CONVERT_CALL_TO_CALLS;
1828
1829 /* If this is a jump/call, then bump the
1830 direct_calls counter. Else force "call" to
1831 "calls" conversions. */
1832 if (r_type == R_MN10300_PCREL32
1833 || r_type == R_MN10300_PLT32
1834 || r_type == R_MN10300_PLT16
1835 || r_type == R_MN10300_PCREL16)
1836 hash->direct_calls++;
1837 else
1838 hash->flags |= MN10300_CONVERT_CALL_TO_CALLS;
1839 }
1840 }
1841
1842 /* Now look at the actual contents to get the stack size,
1843 and a list of what registers were saved in the prologue
1844 (ie movm_args). */
1845 if ((section->flags & SEC_CODE) != 0)
1846 {
1847 Elf_Internal_Sym *isym, *isymend;
1848 unsigned int sec_shndx;
1849 struct elf_link_hash_entry **hashes;
1850 struct elf_link_hash_entry **end_hashes;
1851 unsigned int symcount;
1852
1853 sec_shndx = _bfd_elf_section_from_bfd_section (input_bfd,
1854 section);
1855
1856 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
1857 - symtab_hdr->sh_info);
1858 hashes = elf_sym_hashes (input_bfd);
1859 end_hashes = hashes + symcount;
1860
1861 /* Look at each function defined in this section and
1862 update info for that function. */
1863 isymend = isymbuf + symtab_hdr->sh_info;
1864 for (isym = isymbuf; isym < isymend; isym++)
1865 {
1866 if (isym->st_shndx == sec_shndx
1867 && ELF_ST_TYPE (isym->st_info) == STT_FUNC)
1868 {
1869 struct elf_link_hash_table *elftab;
1870 bfd_size_type amt;
1871 struct elf_link_hash_entry **lhashes = hashes;
1872
1873 /* Skip a local symbol if it aliases a
1874 global one. */
1875 for (; lhashes < end_hashes; lhashes++)
1876 {
1877 hash = (struct elf32_mn10300_link_hash_entry *) *lhashes;
1878 if ((hash->root.root.type == bfd_link_hash_defined
1879 || hash->root.root.type == bfd_link_hash_defweak)
1880 && hash->root.root.u.def.section == section
1881 && hash->root.type == STT_FUNC
1882 && hash->root.root.u.def.value == isym->st_value)
1883 break;
1884 }
1885 if (lhashes != end_hashes)
1886 continue;
1887
1888 if (isym->st_shndx == SHN_UNDEF)
1889 sym_sec = bfd_und_section_ptr;
1890 else if (isym->st_shndx == SHN_ABS)
1891 sym_sec = bfd_abs_section_ptr;
1892 else if (isym->st_shndx == SHN_COMMON)
1893 sym_sec = bfd_com_section_ptr;
1894 else
1895 sym_sec
1896 = bfd_section_from_elf_index (input_bfd,
1897 isym->st_shndx);
1898
1899 sym_name = (bfd_elf_string_from_elf_section
1900 (input_bfd, symtab_hdr->sh_link,
1901 isym->st_name));
1902
1903 /* Tack on an ID so we can uniquely identify this
1904 local symbol in the global hash table. */
1905 amt = strlen (sym_name) + 10;
1906 new_name = bfd_malloc (amt);
1907 if (new_name == 0)
1908 goto error_return;
1909
1910 sprintf (new_name, "%s_%08x", sym_name, sym_sec->id);
1911 sym_name = new_name;
1912
1913 elftab = &hash_table->static_hash_table->root;
1914 hash = ((struct elf32_mn10300_link_hash_entry *)
1915 elf_link_hash_lookup (elftab, sym_name,
1916 TRUE, TRUE, FALSE));
1917 free (new_name);
1918 compute_function_info (input_bfd, hash,
1919 isym->st_value, contents);
1920 }
1921 }
1922
1923 for (; hashes < end_hashes; hashes++)
1924 {
1925 hash = (struct elf32_mn10300_link_hash_entry *) *hashes;
1926 if ((hash->root.root.type == bfd_link_hash_defined
1927 || hash->root.root.type == bfd_link_hash_defweak)
1928 && hash->root.root.u.def.section == section
1929 && hash->root.type == STT_FUNC)
1930 compute_function_info (input_bfd, hash,
1931 (hash)->root.root.u.def.value,
1932 contents);
1933 }
1934 }
1935
1936 /* Cache or free any memory we allocated for the relocs. */
1937 if (internal_relocs != NULL
1938 && elf_section_data (section)->relocs != internal_relocs)
1939 free (internal_relocs);
1940 internal_relocs = NULL;
1941
1942 /* Cache or free any memory we allocated for the contents. */
1943 if (contents != NULL
1944 && elf_section_data (section)->this_hdr.contents != contents)
1945 {
1946 if (! link_info->keep_memory)
1947 free (contents);
1948 else
1949 {
1950 /* Cache the section contents for elf_link_input_bfd. */
1951 elf_section_data (section)->this_hdr.contents = contents;
1952 }
1953 }
1954 contents = NULL;
1955 }
1956
1957 /* Cache or free any memory we allocated for the symbols. */
1958 if (isymbuf != NULL
1959 && symtab_hdr->contents != (unsigned char *) isymbuf)
1960 {
1961 if (! link_info->keep_memory)
1962 free (isymbuf);
1963 else
1964 {
1965 /* Cache the symbols for elf_link_input_bfd. */
1966 symtab_hdr->contents = (unsigned char *) isymbuf;
1967 }
1968 }
1969 isymbuf = NULL;
1970 }
1971
1972 /* Now iterate on each symbol in the hash table and perform
1973 the final initialization steps on each. */
1974 elf32_mn10300_link_hash_traverse (hash_table,
1975 elf32_mn10300_finish_hash_table_entry,
1976 link_info);
1977 elf32_mn10300_link_hash_traverse (hash_table->static_hash_table,
1978 elf32_mn10300_finish_hash_table_entry,
1979 link_info);
1980
1981 /* All entries in the hash table are fully initialized. */
1982 hash_table->flags |= MN10300_HASH_ENTRIES_INITIALIZED;
1983
1984 /* Now that everything has been initialized, go through each
1985 code section and delete any prologue insns which will be
1986 redundant because their operations will be performed by
1987 a "call" instruction. */
1988 for (input_bfd = link_info->input_bfds;
1989 input_bfd != NULL;
1990 input_bfd = input_bfd->link_next)
1991 {
1992 /* We're going to need all the local symbols for each bfd. */
1993 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1994 if (symtab_hdr->sh_info != 0)
1995 {
1996 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1997 if (isymbuf == NULL)
1998 isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
1999 symtab_hdr->sh_info, 0,
2000 NULL, NULL, NULL);
2001 if (isymbuf == NULL)
2002 goto error_return;
2003 }
2004
2005 /* Walk over each section in this bfd. */
2006 for (section = input_bfd->sections;
2007 section != NULL;
2008 section = section->next)
2009 {
2010 unsigned int sec_shndx;
2011 Elf_Internal_Sym *isym, *isymend;
2012 struct elf_link_hash_entry **hashes;
2013 struct elf_link_hash_entry **end_hashes;
2014 unsigned int symcount;
2015
2016 /* Skip non-code sections and empty sections. */
2017 if ((section->flags & SEC_CODE) == 0 || section->size == 0)
2018 continue;
2019
2020 if (section->reloc_count != 0)
2021 {
2022 /* Get a copy of the native relocations. */
2023 internal_relocs = (_bfd_elf_link_read_relocs
2024 (input_bfd, section, (PTR) NULL,
2025 (Elf_Internal_Rela *) NULL,
2026 link_info->keep_memory));
2027 if (internal_relocs == NULL)
2028 goto error_return;
2029 }
2030
2031 /* Get cached copy of section contents if it exists. */
2032 if (elf_section_data (section)->this_hdr.contents != NULL)
2033 contents = elf_section_data (section)->this_hdr.contents;
2034 else
2035 {
2036 /* Go get them off disk. */
2037 if (!bfd_malloc_and_get_section (input_bfd, section,
2038 &contents))
2039 goto error_return;
2040 }
2041
2042 sec_shndx = _bfd_elf_section_from_bfd_section (input_bfd,
2043 section);
2044
2045 /* Now look for any function in this section which needs
2046 insns deleted from its prologue. */
2047 isymend = isymbuf + symtab_hdr->sh_info;
2048 for (isym = isymbuf; isym < isymend; isym++)
2049 {
2050 struct elf32_mn10300_link_hash_entry *sym_hash;
2051 asection *sym_sec = NULL;
2052 const char *sym_name;
2053 char *new_name;
2054 struct elf_link_hash_table *elftab;
2055 bfd_size_type amt;
2056
2057 if (isym->st_shndx != sec_shndx)
2058 continue;
2059
2060 if (isym->st_shndx == SHN_UNDEF)
2061 sym_sec = bfd_und_section_ptr;
2062 else if (isym->st_shndx == SHN_ABS)
2063 sym_sec = bfd_abs_section_ptr;
2064 else if (isym->st_shndx == SHN_COMMON)
2065 sym_sec = bfd_com_section_ptr;
2066 else
2067 sym_sec
2068 = bfd_section_from_elf_index (input_bfd, isym->st_shndx);
2069
2070 sym_name
2071 = bfd_elf_string_from_elf_section (input_bfd,
2072 symtab_hdr->sh_link,
2073 isym->st_name);
2074
2075 /* Tack on an ID so we can uniquely identify this
2076 local symbol in the global hash table. */
2077 amt = strlen (sym_name) + 10;
2078 new_name = bfd_malloc (amt);
2079 if (new_name == 0)
2080 goto error_return;
2081 sprintf (new_name, "%s_%08x", sym_name, sym_sec->id);
2082 sym_name = new_name;
2083
2084 elftab = &hash_table->static_hash_table->root;
2085 sym_hash = ((struct elf32_mn10300_link_hash_entry *)
2086 elf_link_hash_lookup (elftab, sym_name,
2087 FALSE, FALSE, FALSE));
2088
2089 free (new_name);
2090 if (sym_hash == NULL)
2091 continue;
2092
2093 if (! (sym_hash->flags & MN10300_CONVERT_CALL_TO_CALLS)
2094 && ! (sym_hash->flags & MN10300_DELETED_PROLOGUE_BYTES))
2095 {
2096 int bytes = 0;
2097
2098 /* Note that we've changed things. */
2099 elf_section_data (section)->relocs = internal_relocs;
2100 elf_section_data (section)->this_hdr.contents = contents;
2101 symtab_hdr->contents = (unsigned char *) isymbuf;
2102
2103 /* Count how many bytes we're going to delete. */
2104 if (sym_hash->movm_args)
2105 bytes += 2;
2106
2107 if (sym_hash->stack_size > 0)
2108 {
2109 if (sym_hash->stack_size <= 128)
2110 bytes += 3;
2111 else
2112 bytes += 4;
2113 }
2114
2115 /* Note that we've deleted prologue bytes for this
2116 function. */
2117 sym_hash->flags |= MN10300_DELETED_PROLOGUE_BYTES;
2118
2119 /* Actually delete the bytes. */
2120 if (!mn10300_elf_relax_delete_bytes (input_bfd,
2121 section,
2122 isym->st_value,
2123 bytes))
2124 goto error_return;
2125
2126 /* Something changed. Not strictly necessary, but
2127 may lead to more relaxing opportunities. */
2128 *again = TRUE;
2129 }
2130 }
2131
2132 /* Look for any global functions in this section which
2133 need insns deleted from their prologues. */
2134 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
2135 - symtab_hdr->sh_info);
2136 hashes = elf_sym_hashes (input_bfd);
2137 end_hashes = hashes + symcount;
2138 for (; hashes < end_hashes; hashes++)
2139 {
2140 struct elf32_mn10300_link_hash_entry *sym_hash;
2141
2142 sym_hash = (struct elf32_mn10300_link_hash_entry *) *hashes;
2143 if ((sym_hash->root.root.type == bfd_link_hash_defined
2144 || sym_hash->root.root.type == bfd_link_hash_defweak)
2145 && sym_hash->root.root.u.def.section == section
2146 && ! (sym_hash->flags & MN10300_CONVERT_CALL_TO_CALLS)
2147 && ! (sym_hash->flags & MN10300_DELETED_PROLOGUE_BYTES))
2148 {
2149 int bytes = 0;
2150 bfd_vma symval;
2151
2152 /* Note that we've changed things. */
2153 elf_section_data (section)->relocs = internal_relocs;
2154 elf_section_data (section)->this_hdr.contents = contents;
2155 symtab_hdr->contents = (unsigned char *) isymbuf;
2156
2157 /* Count how many bytes we're going to delete. */
2158 if (sym_hash->movm_args)
2159 bytes += 2;
2160
2161 if (sym_hash->stack_size > 0)
2162 {
2163 if (sym_hash->stack_size <= 128)
2164 bytes += 3;
2165 else
2166 bytes += 4;
2167 }
2168
2169 /* Note that we've deleted prologue bytes for this
2170 function. */
2171 sym_hash->flags |= MN10300_DELETED_PROLOGUE_BYTES;
2172
2173 /* Actually delete the bytes. */
2174 symval = sym_hash->root.root.u.def.value;
2175 if (!mn10300_elf_relax_delete_bytes (input_bfd,
2176 section,
2177 symval,
2178 bytes))
2179 goto error_return;
2180
2181 /* Something changed. Not strictly necessary, but
2182 may lead to more relaxing opportunities. */
2183 *again = TRUE;
2184 }
2185 }
2186
2187 /* Cache or free any memory we allocated for the relocs. */
2188 if (internal_relocs != NULL
2189 && elf_section_data (section)->relocs != internal_relocs)
2190 free (internal_relocs);
2191 internal_relocs = NULL;
2192
2193 /* Cache or free any memory we allocated for the contents. */
2194 if (contents != NULL
2195 && elf_section_data (section)->this_hdr.contents != contents)
2196 {
2197 if (! link_info->keep_memory)
2198 free (contents);
2199 else
2200 {
2201 /* Cache the section contents for elf_link_input_bfd. */
2202 elf_section_data (section)->this_hdr.contents = contents;
2203 }
2204 }
2205 contents = NULL;
2206 }
2207
2208 /* Cache or free any memory we allocated for the symbols. */
2209 if (isymbuf != NULL
2210 && symtab_hdr->contents != (unsigned char *) isymbuf)
2211 {
2212 if (! link_info->keep_memory)
2213 free (isymbuf);
2214 else
2215 {
2216 /* Cache the symbols for elf_link_input_bfd. */
2217 symtab_hdr->contents = (unsigned char *) isymbuf;
2218 }
2219 }
2220 isymbuf = NULL;
2221 }
2222 }
2223
2224 /* (Re)initialize for the basic instruction shortening/relaxing pass. */
2225 contents = NULL;
2226 internal_relocs = NULL;
2227 isymbuf = NULL;
2228 /* For error_return. */
2229 section = sec;
2230
2231 /* We don't have to do anything for a relocatable link, if
2232 this section does not have relocs, or if this is not a
2233 code section. */
2234 if (link_info->relocatable
2235 || (sec->flags & SEC_RELOC) == 0
2236 || sec->reloc_count == 0
2237 || (sec->flags & SEC_CODE) == 0)
2238 return TRUE;
2239
2240 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2241
2242 /* Get a copy of the native relocations. */
2243 internal_relocs = (_bfd_elf_link_read_relocs
2244 (abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
2245 link_info->keep_memory));
2246 if (internal_relocs == NULL)
2247 goto error_return;
2248
2249 /* Walk through them looking for relaxing opportunities. */
2250 irelend = internal_relocs + sec->reloc_count;
2251 for (irel = internal_relocs; irel < irelend; irel++)
2252 {
2253 bfd_vma symval;
2254 struct elf32_mn10300_link_hash_entry *h = NULL;
2255
2256 /* If this isn't something that can be relaxed, then ignore
2257 this reloc. */
2258 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_NONE
2259 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_8
2260 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_MAX)
2261 continue;
2262
2263 /* Get the section contents if we haven't done so already. */
2264 if (contents == NULL)
2265 {
2266 /* Get cached copy if it exists. */
2267 if (elf_section_data (sec)->this_hdr.contents != NULL)
2268 contents = elf_section_data (sec)->this_hdr.contents;
2269 else
2270 {
2271 /* Go get them off disk. */
2272 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
2273 goto error_return;
2274 }
2275 }
2276
2277 /* Read this BFD's symbols if we haven't done so already. */
2278 if (isymbuf == NULL && symtab_hdr->sh_info != 0)
2279 {
2280 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
2281 if (isymbuf == NULL)
2282 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
2283 symtab_hdr->sh_info, 0,
2284 NULL, NULL, NULL);
2285 if (isymbuf == NULL)
2286 goto error_return;
2287 }
2288
2289 /* Get the value of the symbol referred to by the reloc. */
2290 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
2291 {
2292 Elf_Internal_Sym *isym;
2293 asection *sym_sec = NULL;
2294 const char *sym_name;
2295 char *new_name;
2296 bfd_vma saved_addend;
2297
2298 /* A local symbol. */
2299 isym = isymbuf + ELF32_R_SYM (irel->r_info);
2300 if (isym->st_shndx == SHN_UNDEF)
2301 sym_sec = bfd_und_section_ptr;
2302 else if (isym->st_shndx == SHN_ABS)
2303 sym_sec = bfd_abs_section_ptr;
2304 else if (isym->st_shndx == SHN_COMMON)
2305 sym_sec = bfd_com_section_ptr;
2306 else
2307 sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
2308
2309 sym_name = bfd_elf_string_from_elf_section (abfd,
2310 symtab_hdr->sh_link,
2311 isym->st_name);
2312
2313 if ((sym_sec->flags & SEC_MERGE)
2314 && ELF_ST_TYPE (isym->st_info) == STT_SECTION
2315 && sym_sec->sec_info_type == ELF_INFO_TYPE_MERGE)
2316 {
2317 saved_addend = irel->r_addend;
2318 symval = _bfd_elf_rela_local_sym (abfd, isym, &sym_sec, irel);
2319 symval += irel->r_addend;
2320 irel->r_addend = saved_addend;
2321 }
2322 else
2323 {
2324 symval = (isym->st_value
2325 + sym_sec->output_section->vma
2326 + sym_sec->output_offset);
2327 }
2328 /* Tack on an ID so we can uniquely identify this
2329 local symbol in the global hash table. */
2330 new_name = bfd_malloc ((bfd_size_type) strlen (sym_name) + 10);
2331 if (new_name == 0)
2332 goto error_return;
2333 sprintf (new_name, "%s_%08x", sym_name, sym_sec->id);
2334 sym_name = new_name;
2335
2336 h = (struct elf32_mn10300_link_hash_entry *)
2337 elf_link_hash_lookup (&hash_table->static_hash_table->root,
2338 sym_name, FALSE, FALSE, FALSE);
2339 free (new_name);
2340 }
2341 else
2342 {
2343 unsigned long indx;
2344
2345 /* An external symbol. */
2346 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
2347 h = (struct elf32_mn10300_link_hash_entry *)
2348 (elf_sym_hashes (abfd)[indx]);
2349 BFD_ASSERT (h != NULL);
2350 if (h->root.root.type != bfd_link_hash_defined
2351 && h->root.root.type != bfd_link_hash_defweak)
2352 {
2353 /* This appears to be a reference to an undefined
2354 symbol. Just ignore it--it will be caught by the
2355 regular reloc processing. */
2356 continue;
2357 }
2358
2359 symval = (h->root.root.u.def.value
2360 + h->root.root.u.def.section->output_section->vma
2361 + h->root.root.u.def.section->output_offset);
2362 }
2363
2364 /* For simplicity of coding, we are going to modify the section
2365 contents, the section relocs, and the BFD symbol table. We
2366 must tell the rest of the code not to free up this
2367 information. It would be possible to instead create a table
2368 of changes which have to be made, as is done in coff-mips.c;
2369 that would be more work, but would require less memory when
2370 the linker is run. */
2371
2372 /* Try to turn a 32bit pc-relative branch/call into a 16bit pc-relative
2373 branch/call, also deal with "call" -> "calls" conversions and
2374 insertion of prologue data into "call" instructions. */
2375 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL32
2376 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PLT32)
2377 {
2378 bfd_vma value = symval;
2379
2380 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PLT32
2381 && h != NULL
2382 && ELF_ST_VISIBILITY (h->root.other) != STV_INTERNAL
2383 && ELF_ST_VISIBILITY (h->root.other) != STV_HIDDEN
2384 && h->root.plt.offset != (bfd_vma) -1)
2385 {
2386 asection * splt;
2387
2388 splt = bfd_get_section_by_name (elf_hash_table (link_info)
2389 ->dynobj, ".plt");
2390
2391 value = ((splt->output_section->vma
2392 + splt->output_offset
2393 + h->root.plt.offset)
2394 - (sec->output_section->vma
2395 + sec->output_offset
2396 + irel->r_offset));
2397 }
2398
2399 /* If we've got a "call" instruction that needs to be turned
2400 into a "calls" instruction, do so now. It saves a byte. */
2401 if (h && (h->flags & MN10300_CONVERT_CALL_TO_CALLS))
2402 {
2403 unsigned char code;
2404
2405 /* Get the opcode. */
2406 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2407
2408 /* Make sure we're working with a "call" instruction! */
2409 if (code == 0xdd)
2410 {
2411 /* Note that we've changed the relocs, section contents,
2412 etc. */
2413 elf_section_data (sec)->relocs = internal_relocs;
2414 elf_section_data (sec)->this_hdr.contents = contents;
2415 symtab_hdr->contents = (unsigned char *) isymbuf;
2416
2417 /* Fix the opcode. */
2418 bfd_put_8 (abfd, 0xfc, contents + irel->r_offset - 1);
2419 bfd_put_8 (abfd, 0xff, contents + irel->r_offset);
2420
2421 /* Fix irel->r_offset and irel->r_addend. */
2422 irel->r_offset += 1;
2423 irel->r_addend += 1;
2424
2425 /* Delete one byte of data. */
2426 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2427 irel->r_offset + 3, 1))
2428 goto error_return;
2429
2430 /* That will change things, so, we should relax again.
2431 Note that this is not required, and it may be slow. */
2432 *again = TRUE;
2433 }
2434 }
2435 else if (h)
2436 {
2437 /* We've got a "call" instruction which needs some data
2438 from target function filled in. */
2439 unsigned char code;
2440
2441 /* Get the opcode. */
2442 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2443
2444 /* Insert data from the target function into the "call"
2445 instruction if needed. */
2446 if (code == 0xdd)
2447 {
2448 bfd_put_8 (abfd, h->movm_args, contents + irel->r_offset + 4);
2449 bfd_put_8 (abfd, h->stack_size + h->movm_stack_size,
2450 contents + irel->r_offset + 5);
2451 }
2452 }
2453
2454 /* Deal with pc-relative gunk. */
2455 value -= (sec->output_section->vma + sec->output_offset);
2456 value -= irel->r_offset;
2457 value += irel->r_addend;
2458
2459 /* See if the value will fit in 16 bits, note the high value is
2460 0x7fff + 2 as the target will be two bytes closer if we are
2461 able to relax. */
2462 if ((long) value < 0x8001 && (long) value > -0x8000)
2463 {
2464 unsigned char code;
2465
2466 /* Get the opcode. */
2467 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2468
2469 if (code != 0xdc && code != 0xdd && code != 0xff)
2470 continue;
2471
2472 /* Note that we've changed the relocs, section contents, etc. */
2473 elf_section_data (sec)->relocs = internal_relocs;
2474 elf_section_data (sec)->this_hdr.contents = contents;
2475 symtab_hdr->contents = (unsigned char *) isymbuf;
2476
2477 /* Fix the opcode. */
2478 if (code == 0xdc)
2479 bfd_put_8 (abfd, 0xcc, contents + irel->r_offset - 1);
2480 else if (code == 0xdd)
2481 bfd_put_8 (abfd, 0xcd, contents + irel->r_offset - 1);
2482 else if (code == 0xff)
2483 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
2484
2485 /* Fix the relocation's type. */
2486 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2487 (ELF32_R_TYPE (irel->r_info)
2488 == (int) R_MN10300_PLT32)
2489 ? R_MN10300_PLT16 :
2490 R_MN10300_PCREL16);
2491
2492 /* Delete two bytes of data. */
2493 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2494 irel->r_offset + 1, 2))
2495 goto error_return;
2496
2497 /* That will change things, so, we should relax again.
2498 Note that this is not required, and it may be slow. */
2499 *again = TRUE;
2500 }
2501 }
2502
2503 /* Try to turn a 16bit pc-relative branch into a 8bit pc-relative
2504 branch. */
2505 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL16)
2506 {
2507 bfd_vma value = symval;
2508
2509 /* If we've got a "call" instruction that needs to be turned
2510 into a "calls" instruction, do so now. It saves a byte. */
2511 if (h && (h->flags & MN10300_CONVERT_CALL_TO_CALLS))
2512 {
2513 unsigned char code;
2514
2515 /* Get the opcode. */
2516 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2517
2518 /* Make sure we're working with a "call" instruction! */
2519 if (code == 0xcd)
2520 {
2521 /* Note that we've changed the relocs, section contents,
2522 etc. */
2523 elf_section_data (sec)->relocs = internal_relocs;
2524 elf_section_data (sec)->this_hdr.contents = contents;
2525 symtab_hdr->contents = (unsigned char *) isymbuf;
2526
2527 /* Fix the opcode. */
2528 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 1);
2529 bfd_put_8 (abfd, 0xff, contents + irel->r_offset);
2530
2531 /* Fix irel->r_offset and irel->r_addend. */
2532 irel->r_offset += 1;
2533 irel->r_addend += 1;
2534
2535 /* Delete one byte of data. */
2536 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2537 irel->r_offset + 1, 1))
2538 goto error_return;
2539
2540 /* That will change things, so, we should relax again.
2541 Note that this is not required, and it may be slow. */
2542 *again = TRUE;
2543 }
2544 }
2545 else if (h)
2546 {
2547 unsigned char code;
2548
2549 /* Get the opcode. */
2550 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2551
2552 /* Insert data from the target function into the "call"
2553 instruction if needed. */
2554 if (code == 0xcd)
2555 {
2556 bfd_put_8 (abfd, h->movm_args, contents + irel->r_offset + 2);
2557 bfd_put_8 (abfd, h->stack_size + h->movm_stack_size,
2558 contents + irel->r_offset + 3);
2559 }
2560 }
2561
2562 /* Deal with pc-relative gunk. */
2563 value -= (sec->output_section->vma + sec->output_offset);
2564 value -= irel->r_offset;
2565 value += irel->r_addend;
2566
2567 /* See if the value will fit in 8 bits, note the high value is
2568 0x7f + 1 as the target will be one bytes closer if we are
2569 able to relax. */
2570 if ((long) value < 0x80 && (long) value > -0x80)
2571 {
2572 unsigned char code;
2573
2574 /* Get the opcode. */
2575 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2576
2577 if (code != 0xcc)
2578 continue;
2579
2580 /* Note that we've changed the relocs, section contents, etc. */
2581 elf_section_data (sec)->relocs = internal_relocs;
2582 elf_section_data (sec)->this_hdr.contents = contents;
2583 symtab_hdr->contents = (unsigned char *) isymbuf;
2584
2585 /* Fix the opcode. */
2586 bfd_put_8 (abfd, 0xca, contents + irel->r_offset - 1);
2587
2588 /* Fix the relocation's type. */
2589 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2590 R_MN10300_PCREL8);
2591
2592 /* Delete one byte of data. */
2593 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2594 irel->r_offset + 1, 1))
2595 goto error_return;
2596
2597 /* That will change things, so, we should relax again.
2598 Note that this is not required, and it may be slow. */
2599 *again = TRUE;
2600 }
2601 }
2602
2603 /* Try to eliminate an unconditional 8 bit pc-relative branch
2604 which immediately follows a conditional 8 bit pc-relative
2605 branch around the unconditional branch.
2606
2607 original: new:
2608 bCC lab1 bCC' lab2
2609 bra lab2
2610 lab1: lab1:
2611
2612 This happens when the bCC can't reach lab2 at assembly time,
2613 but due to other relaxations it can reach at link time. */
2614 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL8)
2615 {
2616 Elf_Internal_Rela *nrel;
2617 bfd_vma value = symval;
2618 unsigned char code;
2619
2620 /* Deal with pc-relative gunk. */
2621 value -= (sec->output_section->vma + sec->output_offset);
2622 value -= irel->r_offset;
2623 value += irel->r_addend;
2624
2625 /* Do nothing if this reloc is the last byte in the section. */
2626 if (irel->r_offset == sec->size)
2627 continue;
2628
2629 /* See if the next instruction is an unconditional pc-relative
2630 branch, more often than not this test will fail, so we
2631 test it first to speed things up. */
2632 code = bfd_get_8 (abfd, contents + irel->r_offset + 1);
2633 if (code != 0xca)
2634 continue;
2635
2636 /* Also make sure the next relocation applies to the next
2637 instruction and that it's a pc-relative 8 bit branch. */
2638 nrel = irel + 1;
2639 if (nrel == irelend
2640 || irel->r_offset + 2 != nrel->r_offset
2641 || ELF32_R_TYPE (nrel->r_info) != (int) R_MN10300_PCREL8)
2642 continue;
2643
2644 /* Make sure our destination immediately follows the
2645 unconditional branch. */
2646 if (symval != (sec->output_section->vma + sec->output_offset
2647 + irel->r_offset + 3))
2648 continue;
2649
2650 /* Now make sure we are a conditional branch. This may not
2651 be necessary, but why take the chance.
2652
2653 Note these checks assume that R_MN10300_PCREL8 relocs
2654 only occur on bCC and bCCx insns. If they occured
2655 elsewhere, we'd need to know the start of this insn
2656 for this check to be accurate. */
2657 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2658 if (code != 0xc0 && code != 0xc1 && code != 0xc2
2659 && code != 0xc3 && code != 0xc4 && code != 0xc5
2660 && code != 0xc6 && code != 0xc7 && code != 0xc8
2661 && code != 0xc9 && code != 0xe8 && code != 0xe9
2662 && code != 0xea && code != 0xeb)
2663 continue;
2664
2665 /* We also have to be sure there is no symbol/label
2666 at the unconditional branch. */
2667 if (mn10300_elf_symbol_address_p (abfd, sec, isymbuf,
2668 irel->r_offset + 1))
2669 continue;
2670
2671 /* Note that we've changed the relocs, section contents, etc. */
2672 elf_section_data (sec)->relocs = internal_relocs;
2673 elf_section_data (sec)->this_hdr.contents = contents;
2674 symtab_hdr->contents = (unsigned char *) isymbuf;
2675
2676 /* Reverse the condition of the first branch. */
2677 switch (code)
2678 {
2679 case 0xc8:
2680 code = 0xc9;
2681 break;
2682 case 0xc9:
2683 code = 0xc8;
2684 break;
2685 case 0xc0:
2686 code = 0xc2;
2687 break;
2688 case 0xc2:
2689 code = 0xc0;
2690 break;
2691 case 0xc3:
2692 code = 0xc1;
2693 break;
2694 case 0xc1:
2695 code = 0xc3;
2696 break;
2697 case 0xc4:
2698 code = 0xc6;
2699 break;
2700 case 0xc6:
2701 code = 0xc4;
2702 break;
2703 case 0xc7:
2704 code = 0xc5;
2705 break;
2706 case 0xc5:
2707 code = 0xc7;
2708 break;
2709 case 0xe8:
2710 code = 0xe9;
2711 break;
2712 case 0x9d:
2713 code = 0xe8;
2714 break;
2715 case 0xea:
2716 code = 0xeb;
2717 break;
2718 case 0xeb:
2719 code = 0xea;
2720 break;
2721 }
2722 bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
2723
2724 /* Set the reloc type and symbol for the first branch
2725 from the second branch. */
2726 irel->r_info = nrel->r_info;
2727
2728 /* Make the reloc for the second branch a null reloc. */
2729 nrel->r_info = ELF32_R_INFO (ELF32_R_SYM (nrel->r_info),
2730 R_MN10300_NONE);
2731
2732 /* Delete two bytes of data. */
2733 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2734 irel->r_offset + 1, 2))
2735 goto error_return;
2736
2737 /* That will change things, so, we should relax again.
2738 Note that this is not required, and it may be slow. */
2739 *again = TRUE;
2740 }
2741
2742 /* Try to turn a 24 immediate, displacement or absolute address
2743 into a 8 immediate, displacement or absolute address. */
2744 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_24)
2745 {
2746 bfd_vma value = symval;
2747 value += irel->r_addend;
2748
2749 /* See if the value will fit in 8 bits. */
2750 if ((long) value < 0x7f && (long) value > -0x80)
2751 {
2752 unsigned char code;
2753
2754 /* AM33 insns which have 24 operands are 6 bytes long and
2755 will have 0xfd as the first byte. */
2756
2757 /* Get the first opcode. */
2758 code = bfd_get_8 (abfd, contents + irel->r_offset - 3);
2759
2760 if (code == 0xfd)
2761 {
2762 /* Get the second opcode. */
2763 code = bfd_get_8 (abfd, contents + irel->r_offset - 2);
2764
2765 /* We can not relax 0x6b, 0x7b, 0x8b, 0x9b as no 24bit
2766 equivalent instructions exists. */
2767 if (code != 0x6b && code != 0x7b
2768 && code != 0x8b && code != 0x9b
2769 && ((code & 0x0f) == 0x09 || (code & 0x0f) == 0x08
2770 || (code & 0x0f) == 0x0a || (code & 0x0f) == 0x0b
2771 || (code & 0x0f) == 0x0e))
2772 {
2773 /* Not safe if the high bit is on as relaxing may
2774 move the value out of high mem and thus not fit
2775 in a signed 8bit value. This is currently over
2776 conservative. */
2777 if ((value & 0x80) == 0)
2778 {
2779 /* Note that we've changed the relocation contents,
2780 etc. */
2781 elf_section_data (sec)->relocs = internal_relocs;
2782 elf_section_data (sec)->this_hdr.contents = contents;
2783 symtab_hdr->contents = (unsigned char *) isymbuf;
2784
2785 /* Fix the opcode. */
2786 bfd_put_8 (abfd, 0xfb, contents + irel->r_offset - 3);
2787 bfd_put_8 (abfd, code, contents + irel->r_offset - 2);
2788
2789 /* Fix the relocation's type. */
2790 irel->r_info =
2791 ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2792 R_MN10300_8);
2793
2794 /* Delete two bytes of data. */
2795 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2796 irel->r_offset + 1, 2))
2797 goto error_return;
2798
2799 /* That will change things, so, we should relax
2800 again. Note that this is not required, and it
2801 may be slow. */
2802 *again = TRUE;
2803 break;
2804 }
2805 }
2806 }
2807 }
2808 }
2809
2810 /* Try to turn a 32bit immediate, displacement or absolute address
2811 into a 16bit immediate, displacement or absolute address. */
2812 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_32
2813 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOT32
2814 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOTOFF32
2815 || ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOTPC32)
2816 {
2817 bfd_vma value = symval;
2818
2819 if (ELF32_R_TYPE (irel->r_info) != (int) R_MN10300_32)
2820 {
2821 asection * sgot;
2822
2823 sgot = bfd_get_section_by_name (elf_hash_table (link_info)
2824 ->dynobj, ".got");
2825
2826 if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOT32)
2827 {
2828 value = sgot->output_offset;
2829
2830 if (h)
2831 value += h->root.got.offset;
2832 else
2833 value += (elf_local_got_offsets
2834 (abfd)[ELF32_R_SYM (irel->r_info)]);
2835 }
2836 else if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOTOFF32)
2837 value -= sgot->output_section->vma;
2838 else if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOTPC32)
2839 value = (sgot->output_section->vma
2840 - (sec->output_section->vma
2841 + sec->output_offset
2842 + irel->r_offset));
2843 else
2844 abort ();
2845 }
2846
2847 value += irel->r_addend;
2848
2849 /* See if the value will fit in 24 bits.
2850 We allow any 16bit match here. We prune those we can't
2851 handle below. */
2852 if ((long) value < 0x7fffff && (long) value > -0x800000)
2853 {
2854 unsigned char code;
2855
2856 /* AM33 insns which have 32bit operands are 7 bytes long and
2857 will have 0xfe as the first byte. */
2858
2859 /* Get the first opcode. */
2860 code = bfd_get_8 (abfd, contents + irel->r_offset - 3);
2861
2862 if (code == 0xfe)
2863 {
2864 /* Get the second opcode. */
2865 code = bfd_get_8 (abfd, contents + irel->r_offset - 2);
2866
2867 /* All the am33 32 -> 24 relaxing possibilities. */
2868 /* We can not relax 0x6b, 0x7b, 0x8b, 0x9b as no 24bit
2869 equivalent instructions exists. */
2870 if (code != 0x6b && code != 0x7b
2871 && code != 0x8b && code != 0x9b
2872 && (ELF32_R_TYPE (irel->r_info)
2873 != (int) R_MN10300_GOTPC32)
2874 && ((code & 0x0f) == 0x09 || (code & 0x0f) == 0x08
2875 || (code & 0x0f) == 0x0a || (code & 0x0f) == 0x0b
2876 || (code & 0x0f) == 0x0e))
2877 {
2878 /* Not safe if the high bit is on as relaxing may
2879 move the value out of high mem and thus not fit
2880 in a signed 16bit value. This is currently over
2881 conservative. */
2882 if ((value & 0x8000) == 0)
2883 {
2884 /* Note that we've changed the relocation contents,
2885 etc. */
2886 elf_section_data (sec)->relocs = internal_relocs;
2887 elf_section_data (sec)->this_hdr.contents = contents;
2888 symtab_hdr->contents = (unsigned char *) isymbuf;
2889
2890 /* Fix the opcode. */
2891 bfd_put_8 (abfd, 0xfd, contents + irel->r_offset - 3);
2892 bfd_put_8 (abfd, code, contents + irel->r_offset - 2);
2893
2894 /* Fix the relocation's type. */
2895 irel->r_info =
2896 ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2897 (ELF32_R_TYPE (irel->r_info)
2898 == (int) R_MN10300_GOTOFF32)
2899 ? R_MN10300_GOTOFF24
2900 : (ELF32_R_TYPE (irel->r_info)
2901 == (int) R_MN10300_GOT32)
2902 ? R_MN10300_GOT24 :
2903 R_MN10300_24);
2904
2905 /* Delete one byte of data. */
2906 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2907 irel->r_offset + 3, 1))
2908 goto error_return;
2909
2910 /* That will change things, so, we should relax
2911 again. Note that this is not required, and it
2912 may be slow. */
2913 *again = TRUE;
2914 break;
2915 }
2916 }
2917 }
2918 }
2919
2920 /* See if the value will fit in 16 bits.
2921 We allow any 16bit match here. We prune those we can't
2922 handle below. */
2923 if ((long) value < 0x7fff && (long) value > -0x8000)
2924 {
2925 unsigned char code;
2926
2927 /* Most insns which have 32bit operands are 6 bytes long;
2928 exceptions are pcrel insns and bit insns.
2929
2930 We handle pcrel insns above. We don't bother trying
2931 to handle the bit insns here.
2932
2933 The first byte of the remaining insns will be 0xfc. */
2934
2935 /* Get the first opcode. */
2936 code = bfd_get_8 (abfd, contents + irel->r_offset - 2);
2937
2938 if (code != 0xfc)
2939 continue;
2940
2941 /* Get the second opcode. */
2942 code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
2943
2944 if ((code & 0xf0) < 0x80)
2945 switch (code & 0xf0)
2946 {
2947 /* mov (d32,am),dn -> mov (d32,am),dn
2948 mov dm,(d32,am) -> mov dn,(d32,am)
2949 mov (d32,am),an -> mov (d32,am),an
2950 mov dm,(d32,am) -> mov dn,(d32,am)
2951 movbu (d32,am),dn -> movbu (d32,am),dn
2952 movbu dm,(d32,am) -> movbu dn,(d32,am)
2953 movhu (d32,am),dn -> movhu (d32,am),dn
2954 movhu dm,(d32,am) -> movhu dn,(d32,am) */
2955 case 0x00:
2956 case 0x10:
2957 case 0x20:
2958 case 0x30:
2959 case 0x40:
2960 case 0x50:
2961 case 0x60:
2962 case 0x70:
2963 /* Not safe if the high bit is on as relaxing may
2964 move the value out of high mem and thus not fit
2965 in a signed 16bit value. */
2966 if (code == 0xcc
2967 && (value & 0x8000))
2968 continue;
2969
2970 /* Note that we've changed the relocation contents, etc. */
2971 elf_section_data (sec)->relocs = internal_relocs;
2972 elf_section_data (sec)->this_hdr.contents = contents;
2973 symtab_hdr->contents = (unsigned char *) isymbuf;
2974
2975 /* Fix the opcode. */
2976 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
2977 bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
2978
2979 /* Fix the relocation's type. */
2980 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2981 (ELF32_R_TYPE (irel->r_info)
2982 == (int) R_MN10300_GOTOFF32)
2983 ? R_MN10300_GOTOFF16
2984 : (ELF32_R_TYPE (irel->r_info)
2985 == (int) R_MN10300_GOT32)
2986 ? R_MN10300_GOT16
2987 : (ELF32_R_TYPE (irel->r_info)
2988 == (int) R_MN10300_GOTPC32)
2989 ? R_MN10300_GOTPC16 :
2990 R_MN10300_16);
2991
2992 /* Delete two bytes of data. */
2993 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
2994 irel->r_offset + 2, 2))
2995 goto error_return;
2996
2997 /* That will change things, so, we should relax again.
2998 Note that this is not required, and it may be slow. */
2999 *again = TRUE;
3000 break;
3001 }
3002 else if ((code & 0xf0) == 0x80
3003 || (code & 0xf0) == 0x90)
3004 switch (code & 0xf3)
3005 {
3006 /* mov dn,(abs32) -> mov dn,(abs16)
3007 movbu dn,(abs32) -> movbu dn,(abs16)
3008 movhu dn,(abs32) -> movhu dn,(abs16) */
3009 case 0x81:
3010 case 0x82:
3011 case 0x83:
3012 /* Note that we've changed the relocation contents, etc. */
3013 elf_section_data (sec)->relocs = internal_relocs;
3014 elf_section_data (sec)->this_hdr.contents = contents;
3015 symtab_hdr->contents = (unsigned char *) isymbuf;
3016
3017 if ((code & 0xf3) == 0x81)
3018 code = 0x01 + (code & 0x0c);
3019 else if ((code & 0xf3) == 0x82)
3020 code = 0x02 + (code & 0x0c);
3021 else if ((code & 0xf3) == 0x83)
3022 code = 0x03 + (code & 0x0c);
3023 else
3024 abort ();
3025
3026 /* Fix the opcode. */
3027 bfd_put_8 (abfd, code, contents + irel->r_offset - 2);
3028
3029 /* Fix the relocation's type. */
3030 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3031 (ELF32_R_TYPE (irel->r_info)
3032 == (int) R_MN10300_GOTOFF32)
3033 ? R_MN10300_GOTOFF16
3034 : (ELF32_R_TYPE (irel->r_info)
3035 == (int) R_MN10300_GOT32)
3036 ? R_MN10300_GOT16
3037 : (ELF32_R_TYPE (irel->r_info)
3038 == (int) R_MN10300_GOTPC32)
3039 ? R_MN10300_GOTPC16 :
3040 R_MN10300_16);
3041
3042 /* The opcode got shorter too, so we have to fix the
3043 addend and offset too! */
3044 irel->r_offset -= 1;
3045
3046 /* Delete three bytes of data. */
3047 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3048 irel->r_offset + 1, 3))
3049 goto error_return;
3050
3051 /* That will change things, so, we should relax again.
3052 Note that this is not required, and it may be slow. */
3053 *again = TRUE;
3054 break;
3055
3056 /* mov am,(abs32) -> mov am,(abs16)
3057 mov am,(d32,sp) -> mov am,(d16,sp)
3058 mov dm,(d32,sp) -> mov dm,(d32,sp)
3059 movbu dm,(d32,sp) -> movbu dm,(d32,sp)
3060 movhu dm,(d32,sp) -> movhu dm,(d32,sp) */
3061 case 0x80:
3062 case 0x90:
3063 case 0x91:
3064 case 0x92:
3065 case 0x93:
3066 /* sp-based offsets are zero-extended. */
3067 if (code >= 0x90 && code <= 0x93
3068 && (long)value < 0)
3069 continue;
3070
3071 /* Note that we've changed the relocation contents, etc. */
3072 elf_section_data (sec)->relocs = internal_relocs;
3073 elf_section_data (sec)->this_hdr.contents = contents;
3074 symtab_hdr->contents = (unsigned char *) isymbuf;
3075
3076 /* Fix the opcode. */
3077 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
3078 bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
3079
3080 /* Fix the relocation's type. */
3081 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3082 (ELF32_R_TYPE (irel->r_info)
3083 == (int) R_MN10300_GOTOFF32)
3084 ? R_MN10300_GOTOFF16
3085 : (ELF32_R_TYPE (irel->r_info)
3086 == (int) R_MN10300_GOT32)
3087 ? R_MN10300_GOT16
3088 : (ELF32_R_TYPE (irel->r_info)
3089 == (int) R_MN10300_GOTPC32)
3090 ? R_MN10300_GOTPC16 :
3091 R_MN10300_16);
3092
3093 /* Delete two bytes of data. */
3094 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3095 irel->r_offset + 2, 2))
3096 goto error_return;
3097
3098 /* That will change things, so, we should relax again.
3099 Note that this is not required, and it may be slow. */
3100 *again = TRUE;
3101 break;
3102 }
3103 else if ((code & 0xf0) < 0xf0)
3104 switch (code & 0xfc)
3105 {
3106 /* mov imm32,dn -> mov imm16,dn
3107 mov imm32,an -> mov imm16,an
3108 mov (abs32),dn -> mov (abs16),dn
3109 movbu (abs32),dn -> movbu (abs16),dn
3110 movhu (abs32),dn -> movhu (abs16),dn */
3111 case 0xcc:
3112 case 0xdc:
3113 case 0xa4:
3114 case 0xa8:
3115 case 0xac:
3116 /* Not safe if the high bit is on as relaxing may
3117 move the value out of high mem and thus not fit
3118 in a signed 16bit value. */
3119 if (code == 0xcc
3120 && (value & 0x8000))
3121 continue;
3122
3123 /* mov imm16, an zero-extends the immediate. */
3124 if (code == 0xdc
3125 && (long)value < 0)
3126 continue;
3127
3128 /* Note that we've changed the relocation contents, etc. */
3129 elf_section_data (sec)->relocs = internal_relocs;
3130 elf_section_data (sec)->this_hdr.contents = contents;
3131 symtab_hdr->contents = (unsigned char *) isymbuf;
3132
3133 if ((code & 0xfc) == 0xcc)
3134 code = 0x2c + (code & 0x03);
3135 else if ((code & 0xfc) == 0xdc)
3136 code = 0x24 + (code & 0x03);
3137 else if ((code & 0xfc) == 0xa4)
3138 code = 0x30 + (code & 0x03);
3139 else if ((code & 0xfc) == 0xa8)
3140 code = 0x34 + (code & 0x03);
3141 else if ((code & 0xfc) == 0xac)
3142 code = 0x38 + (code & 0x03);
3143 else
3144 abort ();
3145
3146 /* Fix the opcode. */
3147 bfd_put_8 (abfd, code, contents + irel->r_offset - 2);
3148
3149 /* Fix the relocation's type. */
3150 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3151 (ELF32_R_TYPE (irel->r_info)
3152 == (int) R_MN10300_GOTOFF32)
3153 ? R_MN10300_GOTOFF16
3154 : (ELF32_R_TYPE (irel->r_info)
3155 == (int) R_MN10300_GOT32)
3156 ? R_MN10300_GOT16
3157 : (ELF32_R_TYPE (irel->r_info)
3158 == (int) R_MN10300_GOTPC32)
3159 ? R_MN10300_GOTPC16 :
3160 R_MN10300_16);
3161
3162 /* The opcode got shorter too, so we have to fix the
3163 addend and offset too! */
3164 irel->r_offset -= 1;
3165
3166 /* Delete three bytes of data. */
3167 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3168 irel->r_offset + 1, 3))
3169 goto error_return;
3170
3171 /* That will change things, so, we should relax again.
3172 Note that this is not required, and it may be slow. */
3173 *again = TRUE;
3174 break;
3175
3176 /* mov (abs32),an -> mov (abs16),an
3177 mov (d32,sp),an -> mov (d16,sp),an
3178 mov (d32,sp),dn -> mov (d16,sp),dn
3179 movbu (d32,sp),dn -> movbu (d16,sp),dn
3180 movhu (d32,sp),dn -> movhu (d16,sp),dn
3181 add imm32,dn -> add imm16,dn
3182 cmp imm32,dn -> cmp imm16,dn
3183 add imm32,an -> add imm16,an
3184 cmp imm32,an -> cmp imm16,an
3185 and imm32,dn -> and imm16,dn
3186 or imm32,dn -> or imm16,dn
3187 xor imm32,dn -> xor imm16,dn
3188 btst imm32,dn -> btst imm16,dn */
3189
3190 case 0xa0:
3191 case 0xb0:
3192 case 0xb1:
3193 case 0xb2:
3194 case 0xb3:
3195 case 0xc0:
3196 case 0xc8:
3197
3198 case 0xd0:
3199 case 0xd8:
3200 case 0xe0:
3201 case 0xe1:
3202 case 0xe2:
3203 case 0xe3:
3204 /* cmp imm16, an zero-extends the immediate. */
3205 if (code == 0xdc
3206 && (long)value < 0)
3207 continue;
3208
3209 /* So do sp-based offsets. */
3210 if (code >= 0xb0 && code <= 0xb3
3211 && (long)value < 0)
3212 continue;
3213
3214 /* Note that we've changed the relocation contents, etc. */
3215 elf_section_data (sec)->relocs = internal_relocs;
3216 elf_section_data (sec)->this_hdr.contents = contents;
3217 symtab_hdr->contents = (unsigned char *) isymbuf;
3218
3219 /* Fix the opcode. */
3220 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
3221 bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
3222
3223 /* Fix the relocation's type. */
3224 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3225 (ELF32_R_TYPE (irel->r_info)
3226 == (int) R_MN10300_GOTOFF32)
3227 ? R_MN10300_GOTOFF16
3228 : (ELF32_R_TYPE (irel->r_info)
3229 == (int) R_MN10300_GOT32)
3230 ? R_MN10300_GOT16
3231 : (ELF32_R_TYPE (irel->r_info)
3232 == (int) R_MN10300_GOTPC32)
3233 ? R_MN10300_GOTPC16 :
3234 R_MN10300_16);
3235
3236 /* Delete two bytes of data. */
3237 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3238 irel->r_offset + 2, 2))
3239 goto error_return;
3240
3241 /* That will change things, so, we should relax again.
3242 Note that this is not required, and it may be slow. */
3243 *again = TRUE;
3244 break;
3245 }
3246 else if (code == 0xfe)
3247 {
3248 /* add imm32,sp -> add imm16,sp */
3249
3250 /* Note that we've changed the relocation contents, etc. */
3251 elf_section_data (sec)->relocs = internal_relocs;
3252 elf_section_data (sec)->this_hdr.contents = contents;
3253 symtab_hdr->contents = (unsigned char *) isymbuf;
3254
3255 /* Fix the opcode. */
3256 bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
3257 bfd_put_8 (abfd, 0xfe, contents + irel->r_offset - 1);
3258
3259 /* Fix the relocation's type. */
3260 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
3261 (ELF32_R_TYPE (irel->r_info)
3262 == (int) R_MN10300_GOT32)
3263 ? R_MN10300_GOT16
3264 : (ELF32_R_TYPE (irel->r_info)
3265 == (int) R_MN10300_GOTOFF32)
3266 ? R_MN10300_GOTOFF16
3267 : (ELF32_R_TYPE (irel->r_info)
3268 == (int) R_MN10300_GOTPC32)
3269 ? R_MN10300_GOTPC16 :
3270 R_MN10300_16);
3271
3272 /* Delete two bytes of data. */
3273 if (!mn10300_elf_relax_delete_bytes (abfd, sec,
3274 irel->r_offset + 2, 2))
3275 goto error_return;
3276
3277 /* That will change things, so, we should relax again.
3278 Note that this is not required, and it may be slow. */
3279 *again = TRUE;
3280 break;
3281 }
3282 }
3283 }
3284 }
3285
3286 if (isymbuf != NULL
3287 && symtab_hdr->contents != (unsigned char *) isymbuf)
3288 {
3289 if (! link_info->keep_memory)
3290 free (isymbuf);
3291 else
3292 {
3293 /* Cache the symbols for elf_link_input_bfd. */
3294 symtab_hdr->contents = (unsigned char *) isymbuf;
3295 }
3296 }
3297
3298 if (contents != NULL
3299 && elf_section_data (sec)->this_hdr.contents != contents)
3300 {
3301 if (! link_info->keep_memory)
3302 free (contents);
3303 else
3304 {
3305 /* Cache the section contents for elf_link_input_bfd. */
3306 elf_section_data (sec)->this_hdr.contents = contents;
3307 }
3308 }
3309
3310 if (internal_relocs != NULL
3311 && elf_section_data (sec)->relocs != internal_relocs)
3312 free (internal_relocs);
3313
3314 return TRUE;
3315
3316 error_return:
3317 if (isymbuf != NULL
3318 && symtab_hdr->contents != (unsigned char *) isymbuf)
3319 free (isymbuf);
3320 if (contents != NULL
3321 && elf_section_data (section)->this_hdr.contents != contents)
3322 free (contents);
3323 if (internal_relocs != NULL
3324 && elf_section_data (section)->relocs != internal_relocs)
3325 free (internal_relocs);
3326
3327 return FALSE;
3328 }
3329
3330 /* Compute the stack size and movm arguments for the function
3331 referred to by HASH at address ADDR in section with
3332 contents CONTENTS, store the information in the hash table. */
3333 static void
3334 compute_function_info (abfd, hash, addr, contents)
3335 bfd *abfd;
3336 struct elf32_mn10300_link_hash_entry *hash;
3337 bfd_vma addr;
3338 unsigned char *contents;
3339 {
3340 unsigned char byte1, byte2;
3341 /* We only care about a very small subset of the possible prologue
3342 sequences here. Basically we look for:
3343
3344 movm [d2,d3,a2,a3],sp (optional)
3345 add <size>,sp (optional, and only for sizes which fit in an unsigned
3346 8 bit number)
3347
3348 If we find anything else, we quit. */
3349
3350 /* Look for movm [regs],sp */
3351 byte1 = bfd_get_8 (abfd, contents + addr);
3352 byte2 = bfd_get_8 (abfd, contents + addr + 1);
3353
3354 if (byte1 == 0xcf)
3355 {
3356 hash->movm_args = byte2;
3357 addr += 2;
3358 byte1 = bfd_get_8 (abfd, contents + addr);
3359 byte2 = bfd_get_8 (abfd, contents + addr + 1);
3360 }
3361
3362 /* Now figure out how much stack space will be allocated by the movm
3363 instruction. We need this kept separate from the function's normal
3364 stack space. */
3365 if (hash->movm_args)
3366 {
3367 /* Space for d2. */
3368 if (hash->movm_args & 0x80)
3369 hash->movm_stack_size += 4;
3370
3371 /* Space for d3. */
3372 if (hash->movm_args & 0x40)
3373 hash->movm_stack_size += 4;
3374
3375 /* Space for a2. */
3376 if (hash->movm_args & 0x20)
3377 hash->movm_stack_size += 4;
3378
3379 /* Space for a3. */
3380 if (hash->movm_args & 0x10)
3381 hash->movm_stack_size += 4;
3382
3383 /* "other" space. d0, d1, a0, a1, mdr, lir, lar, 4 byte pad. */
3384 if (hash->movm_args & 0x08)
3385 hash->movm_stack_size += 8 * 4;
3386
3387 if (bfd_get_mach (abfd) == bfd_mach_am33
3388 || bfd_get_mach (abfd) == bfd_mach_am33_2)
3389 {
3390 /* "exother" space. e0, e1, mdrq, mcrh, mcrl, mcvf */
3391 if (hash->movm_args & 0x1)
3392 hash->movm_stack_size += 6 * 4;
3393
3394 /* exreg1 space. e4, e5, e6, e7 */
3395 if (hash->movm_args & 0x2)
3396 hash->movm_stack_size += 4 * 4;
3397
3398 /* exreg0 space. e2, e3 */
3399 if (hash->movm_args & 0x4)
3400 hash->movm_stack_size += 2 * 4;
3401 }
3402 }
3403
3404 /* Now look for the two stack adjustment variants. */
3405 if (byte1 == 0xf8 && byte2 == 0xfe)
3406 {
3407 int temp = bfd_get_8 (abfd, contents + addr + 2);
3408 temp = ((temp & 0xff) ^ (~0x7f)) + 0x80;
3409
3410 hash->stack_size = -temp;
3411 }
3412 else if (byte1 == 0xfa && byte2 == 0xfe)
3413 {
3414 int temp = bfd_get_16 (abfd, contents + addr + 2);
3415 temp = ((temp & 0xffff) ^ (~0x7fff)) + 0x8000;
3416 temp = -temp;
3417
3418 if (temp < 255)
3419 hash->stack_size = temp;
3420 }
3421
3422 /* If the total stack to be allocated by the call instruction is more
3423 than 255 bytes, then we can't remove the stack adjustment by using
3424 "call" (we might still be able to remove the "movm" instruction. */
3425 if (hash->stack_size + hash->movm_stack_size > 255)
3426 hash->stack_size = 0;
3427
3428 return;
3429 }
3430
3431 /* Delete some bytes from a section while relaxing. */
3432
3433 static bfd_boolean
3434 mn10300_elf_relax_delete_bytes (abfd, sec, addr, count)
3435 bfd *abfd;
3436 asection *sec;
3437 bfd_vma addr;
3438 int count;
3439 {
3440 Elf_Internal_Shdr *symtab_hdr;
3441 unsigned int sec_shndx;
3442 bfd_byte *contents;
3443 Elf_Internal_Rela *irel, *irelend;
3444 Elf_Internal_Rela *irelalign;
3445 bfd_vma toaddr;
3446 Elf_Internal_Sym *isym, *isymend;
3447 struct elf_link_hash_entry **sym_hashes;
3448 struct elf_link_hash_entry **end_hashes;
3449 unsigned int symcount;
3450
3451 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
3452
3453 contents = elf_section_data (sec)->this_hdr.contents;
3454
3455 /* The deletion must stop at the next ALIGN reloc for an aligment
3456 power larger than the number of bytes we are deleting. */
3457
3458 irelalign = NULL;
3459 toaddr = sec->size;
3460
3461 irel = elf_section_data (sec)->relocs;
3462 irelend = irel + sec->reloc_count;
3463
3464 /* Actually delete the bytes. */
3465 memmove (contents + addr, contents + addr + count,
3466 (size_t) (toaddr - addr - count));
3467 sec->size -= count;
3468
3469 /* Adjust all the relocs. */
3470 for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
3471 {
3472 /* Get the new reloc address. */
3473 if ((irel->r_offset > addr
3474 && irel->r_offset < toaddr))
3475 irel->r_offset -= count;
3476 }
3477
3478 /* Adjust the local symbols defined in this section. */
3479 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3480 isym = (Elf_Internal_Sym *) symtab_hdr->contents;
3481 for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
3482 {
3483 if (isym->st_shndx == sec_shndx
3484 && isym->st_value > addr
3485 && isym->st_value < toaddr)
3486 isym->st_value -= count;
3487 }
3488
3489 /* Now adjust the global symbols defined in this section. */
3490 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
3491 - symtab_hdr->sh_info);
3492 sym_hashes = elf_sym_hashes (abfd);
3493 end_hashes = sym_hashes + symcount;
3494 for (; sym_hashes < end_hashes; sym_hashes++)
3495 {
3496 struct elf_link_hash_entry *sym_hash = *sym_hashes;
3497 if ((sym_hash->root.type == bfd_link_hash_defined
3498 || sym_hash->root.type == bfd_link_hash_defweak)
3499 && sym_hash->root.u.def.section == sec
3500 && sym_hash->root.u.def.value > addr
3501 && sym_hash->root.u.def.value < toaddr)
3502 {
3503 sym_hash->root.u.def.value -= count;
3504 }
3505 }
3506
3507 return TRUE;
3508 }
3509
3510 /* Return TRUE if a symbol exists at the given address, else return
3511 FALSE. */
3512 static bfd_boolean
3513 mn10300_elf_symbol_address_p (abfd, sec, isym, addr)
3514 bfd *abfd;
3515 asection *sec;
3516 Elf_Internal_Sym *isym;
3517 bfd_vma addr;
3518 {
3519 Elf_Internal_Shdr *symtab_hdr;
3520 unsigned int sec_shndx;
3521 Elf_Internal_Sym *isymend;
3522 struct elf_link_hash_entry **sym_hashes;
3523 struct elf_link_hash_entry **end_hashes;
3524 unsigned int symcount;
3525
3526 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
3527
3528 /* Examine all the symbols. */
3529 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3530 for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
3531 {
3532 if (isym->st_shndx == sec_shndx
3533 && isym->st_value == addr)
3534 return TRUE;
3535 }
3536
3537 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
3538 - symtab_hdr->sh_info);
3539 sym_hashes = elf_sym_hashes (abfd);
3540 end_hashes = sym_hashes + symcount;
3541 for (; sym_hashes < end_hashes; sym_hashes++)
3542 {
3543 struct elf_link_hash_entry *sym_hash = *sym_hashes;
3544 if ((sym_hash->root.type == bfd_link_hash_defined
3545 || sym_hash->root.type == bfd_link_hash_defweak)
3546 && sym_hash->root.u.def.section == sec
3547 && sym_hash->root.u.def.value == addr)
3548 return TRUE;
3549 }
3550
3551 return FALSE;
3552 }
3553
3554 /* This is a version of bfd_generic_get_relocated_section_contents
3555 which uses mn10300_elf_relocate_section. */
3556
3557 static bfd_byte *
3558 mn10300_elf_get_relocated_section_contents (output_bfd, link_info, link_order,
3559 data, relocatable, symbols)
3560 bfd *output_bfd;
3561 struct bfd_link_info *link_info;
3562 struct bfd_link_order *link_order;
3563 bfd_byte *data;
3564 bfd_boolean relocatable;
3565 asymbol **symbols;
3566 {
3567 Elf_Internal_Shdr *symtab_hdr;
3568 asection *input_section = link_order->u.indirect.section;
3569 bfd *input_bfd = input_section->owner;
3570 asection **sections = NULL;
3571 Elf_Internal_Rela *internal_relocs = NULL;
3572 Elf_Internal_Sym *isymbuf = NULL;
3573
3574 /* We only need to handle the case of relaxing, or of having a
3575 particular set of section contents, specially. */
3576 if (relocatable
3577 || elf_section_data (input_section)->this_hdr.contents == NULL)
3578 return bfd_generic_get_relocated_section_contents (output_bfd, link_info,
3579 link_order, data,
3580 relocatable,
3581 symbols);
3582
3583 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3584
3585 memcpy (data, elf_section_data (input_section)->this_hdr.contents,
3586 (size_t) input_section->size);
3587
3588 if ((input_section->flags & SEC_RELOC) != 0
3589 && input_section->reloc_count > 0)
3590 {
3591 asection **secpp;
3592 Elf_Internal_Sym *isym, *isymend;
3593 bfd_size_type amt;
3594
3595 internal_relocs = (_bfd_elf_link_read_relocs
3596 (input_bfd, input_section, (PTR) NULL,
3597 (Elf_Internal_Rela *) NULL, FALSE));
3598 if (internal_relocs == NULL)
3599 goto error_return;
3600
3601 if (symtab_hdr->sh_info != 0)
3602 {
3603 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
3604 if (isymbuf == NULL)
3605 isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
3606 symtab_hdr->sh_info, 0,
3607 NULL, NULL, NULL);
3608 if (isymbuf == NULL)
3609 goto error_return;
3610 }
3611
3612 amt = symtab_hdr->sh_info;
3613 amt *= sizeof (asection *);
3614 sections = (asection **) bfd_malloc (amt);
3615 if (sections == NULL && amt != 0)
3616 goto error_return;
3617
3618 isymend = isymbuf + symtab_hdr->sh_info;
3619 for (isym = isymbuf, secpp = sections; isym < isymend; ++isym, ++secpp)
3620 {
3621 asection *isec;
3622
3623 if (isym->st_shndx == SHN_UNDEF)
3624 isec = bfd_und_section_ptr;
3625 else if (isym->st_shndx == SHN_ABS)
3626 isec = bfd_abs_section_ptr;
3627 else if (isym->st_shndx == SHN_COMMON)
3628 isec = bfd_com_section_ptr;
3629 else
3630 isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx);
3631
3632 *secpp = isec;
3633 }
3634
3635 if (! mn10300_elf_relocate_section (output_bfd, link_info, input_bfd,
3636 input_section, data, internal_relocs,
3637 isymbuf, sections))
3638 goto error_return;
3639
3640 if (sections != NULL)
3641 free (sections);
3642 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
3643 free (isymbuf);
3644 if (internal_relocs != elf_section_data (input_section)->relocs)
3645 free (internal_relocs);
3646 }
3647
3648 return data;
3649
3650 error_return:
3651 if (sections != NULL)
3652 free (sections);
3653 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
3654 free (isymbuf);
3655 if (internal_relocs != NULL
3656 && internal_relocs != elf_section_data (input_section)->relocs)
3657 free (internal_relocs);
3658 return NULL;
3659 }
3660
3661 /* Assorted hash table functions. */
3662
3663 /* Initialize an entry in the link hash table. */
3664
3665 /* Create an entry in an MN10300 ELF linker hash table. */
3666
3667 static struct bfd_hash_entry *
3668 elf32_mn10300_link_hash_newfunc (entry, table, string)
3669 struct bfd_hash_entry *entry;
3670 struct bfd_hash_table *table;
3671 const char *string;
3672 {
3673 struct elf32_mn10300_link_hash_entry *ret =
3674 (struct elf32_mn10300_link_hash_entry *) entry;
3675
3676 /* Allocate the structure if it has not already been allocated by a
3677 subclass. */
3678 if (ret == (struct elf32_mn10300_link_hash_entry *) NULL)
3679 ret = ((struct elf32_mn10300_link_hash_entry *)
3680 bfd_hash_allocate (table,
3681 sizeof (struct elf32_mn10300_link_hash_entry)));
3682 if (ret == (struct elf32_mn10300_link_hash_entry *) NULL)
3683 return (struct bfd_hash_entry *) ret;
3684
3685 /* Call the allocation method of the superclass. */
3686 ret = ((struct elf32_mn10300_link_hash_entry *)
3687 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
3688 table, string));
3689 if (ret != (struct elf32_mn10300_link_hash_entry *) NULL)
3690 {
3691 ret->direct_calls = 0;
3692 ret->stack_size = 0;
3693 ret->movm_args = 0;
3694 ret->movm_stack_size = 0;
3695 ret->flags = 0;
3696 }
3697
3698 return (struct bfd_hash_entry *) ret;
3699 }
3700
3701 /* Create an mn10300 ELF linker hash table. */
3702
3703 static struct bfd_link_hash_table *
3704 elf32_mn10300_link_hash_table_create (abfd)
3705 bfd *abfd;
3706 {
3707 struct elf32_mn10300_link_hash_table *ret;
3708 bfd_size_type amt = sizeof (struct elf32_mn10300_link_hash_table);
3709
3710 ret = (struct elf32_mn10300_link_hash_table *) bfd_malloc (amt);
3711 if (ret == (struct elf32_mn10300_link_hash_table *) NULL)
3712 return NULL;
3713
3714 if (! _bfd_elf_link_hash_table_init (&ret->root, abfd,
3715 elf32_mn10300_link_hash_newfunc))
3716 {
3717 free (ret);
3718 return NULL;
3719 }
3720
3721 ret->flags = 0;
3722 amt = sizeof (struct elf_link_hash_table);
3723 ret->static_hash_table
3724 = (struct elf32_mn10300_link_hash_table *) bfd_malloc (amt);
3725 if (ret->static_hash_table == NULL)
3726 {
3727 free (ret);
3728 return NULL;
3729 }
3730
3731 if (! _bfd_elf_link_hash_table_init (&ret->static_hash_table->root, abfd,
3732 elf32_mn10300_link_hash_newfunc))
3733 {
3734 free (ret->static_hash_table);
3735 free (ret);
3736 return NULL;
3737 }
3738 return &ret->root.root;
3739 }
3740
3741 /* Free an mn10300 ELF linker hash table. */
3742
3743 static void
3744 elf32_mn10300_link_hash_table_free (hash)
3745 struct bfd_link_hash_table *hash;
3746 {
3747 struct elf32_mn10300_link_hash_table *ret
3748 = (struct elf32_mn10300_link_hash_table *) hash;
3749
3750 _bfd_generic_link_hash_table_free
3751 ((struct bfd_link_hash_table *) ret->static_hash_table);
3752 _bfd_generic_link_hash_table_free
3753 ((struct bfd_link_hash_table *) ret);
3754 }
3755
3756 static unsigned long
3757 elf_mn10300_mach (flags)
3758 flagword flags;
3759 {
3760 switch (flags & EF_MN10300_MACH)
3761 {
3762 case E_MN10300_MACH_MN10300:
3763 default:
3764 return bfd_mach_mn10300;
3765
3766 case E_MN10300_MACH_AM33:
3767 return bfd_mach_am33;
3768
3769 case E_MN10300_MACH_AM33_2:
3770 return bfd_mach_am33_2;
3771 }
3772 }
3773
3774 /* The final processing done just before writing out a MN10300 ELF object
3775 file. This gets the MN10300 architecture right based on the machine
3776 number. */
3777
3778 void
3779 _bfd_mn10300_elf_final_write_processing (abfd, linker)
3780 bfd *abfd;
3781 bfd_boolean linker ATTRIBUTE_UNUSED;
3782 {
3783 unsigned long val;
3784
3785 switch (bfd_get_mach (abfd))
3786 {
3787 default:
3788 case bfd_mach_mn10300:
3789 val = E_MN10300_MACH_MN10300;
3790 break;
3791
3792 case bfd_mach_am33:
3793 val = E_MN10300_MACH_AM33;
3794 break;
3795
3796 case bfd_mach_am33_2:
3797 val = E_MN10300_MACH_AM33_2;
3798 break;
3799 }
3800
3801 elf_elfheader (abfd)->e_flags &= ~ (EF_MN10300_MACH);
3802 elf_elfheader (abfd)->e_flags |= val;
3803 }
3804
3805 bfd_boolean
3806 _bfd_mn10300_elf_object_p (abfd)
3807 bfd *abfd;
3808 {
3809 bfd_default_set_arch_mach (abfd, bfd_arch_mn10300,
3810 elf_mn10300_mach (elf_elfheader (abfd)->e_flags));
3811 return TRUE;
3812 }
3813
3814 /* Merge backend specific data from an object file to the output
3815 object file when linking. */
3816
3817 bfd_boolean
3818 _bfd_mn10300_elf_merge_private_bfd_data (ibfd, obfd)
3819 bfd *ibfd;
3820 bfd *obfd;
3821 {
3822 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3823 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3824 return TRUE;
3825
3826 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
3827 && bfd_get_mach (obfd) < bfd_get_mach (ibfd))
3828 {
3829 if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd),
3830 bfd_get_mach (ibfd)))
3831 return FALSE;
3832 }
3833
3834 return TRUE;
3835 }
3836
3837 #define PLT0_ENTRY_SIZE 15
3838 #define PLT_ENTRY_SIZE 20
3839 #define PIC_PLT_ENTRY_SIZE 24
3840
3841 static const bfd_byte elf_mn10300_plt0_entry[PLT0_ENTRY_SIZE] =
3842 {
3843 0xfc, 0xa0, 0, 0, 0, 0, /* mov (.got+8),a0 */
3844 0xfe, 0xe, 0x10, 0, 0, 0, 0, /* mov (.got+4),r1 */
3845 0xf0, 0xf4, /* jmp (a0) */
3846 };
3847
3848 static const bfd_byte elf_mn10300_plt_entry[PLT_ENTRY_SIZE] =
3849 {
3850 0xfc, 0xa0, 0, 0, 0, 0, /* mov (nameN@GOT + .got),a0 */
3851 0xf0, 0xf4, /* jmp (a0) */
3852 0xfe, 8, 0, 0, 0, 0, 0, /* mov reloc-table-address,r0 */
3853 0xdc, 0, 0, 0, 0, /* jmp .plt0 */
3854 };
3855
3856 static const bfd_byte elf_mn10300_pic_plt_entry[PIC_PLT_ENTRY_SIZE] =
3857 {
3858 0xfc, 0x22, 0, 0, 0, 0, /* mov (nameN@GOT,a2),a0 */
3859 0xf0, 0xf4, /* jmp (a0) */
3860 0xfe, 8, 0, 0, 0, 0, 0, /* mov reloc-table-address,r0 */
3861 0xf8, 0x22, 8, /* mov (8,a2),a0 */
3862 0xfb, 0xa, 0x1a, 4, /* mov (4,a2),r1 */
3863 0xf0, 0xf4, /* jmp (a0) */
3864 };
3865
3866 /* Return size of the first PLT entry. */
3867 #define elf_mn10300_sizeof_plt0(info) \
3868 (info->shared ? PIC_PLT_ENTRY_SIZE : PLT0_ENTRY_SIZE)
3869
3870 /* Return size of a PLT entry. */
3871 #define elf_mn10300_sizeof_plt(info) \
3872 (info->shared ? PIC_PLT_ENTRY_SIZE : PLT_ENTRY_SIZE)
3873
3874 /* Return offset of the PLT0 address in an absolute PLT entry. */
3875 #define elf_mn10300_plt_plt0_offset(info) 16
3876
3877 /* Return offset of the linker in PLT0 entry. */
3878 #define elf_mn10300_plt0_linker_offset(info) 2
3879
3880 /* Return offset of the GOT id in PLT0 entry. */
3881 #define elf_mn10300_plt0_gotid_offset(info) 9
3882
3883 /* Return offset of the temporary in PLT entry */
3884 #define elf_mn10300_plt_temp_offset(info) 8
3885
3886 /* Return offset of the symbol in PLT entry. */
3887 #define elf_mn10300_plt_symbol_offset(info) 2
3888
3889 /* Return offset of the relocation in PLT entry. */
3890 #define elf_mn10300_plt_reloc_offset(info) 11
3891
3892 /* The name of the dynamic interpreter. This is put in the .interp
3893 section. */
3894
3895 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
3896
3897 /* Create dynamic sections when linking against a dynamic object. */
3898
3899 static bfd_boolean
3900 _bfd_mn10300_elf_create_dynamic_sections (abfd, info)
3901 bfd *abfd;
3902 struct bfd_link_info *info;
3903 {
3904 flagword flags;
3905 asection * s;
3906 const struct elf_backend_data * bed = get_elf_backend_data (abfd);
3907 int ptralign = 0;
3908
3909 switch (bed->s->arch_size)
3910 {
3911 case 32:
3912 ptralign = 2;
3913 break;
3914
3915 case 64:
3916 ptralign = 3;
3917 break;
3918
3919 default:
3920 bfd_set_error (bfd_error_bad_value);
3921 return FALSE;
3922 }
3923
3924 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
3925 .rel[a].bss sections. */
3926
3927 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3928 | SEC_LINKER_CREATED);
3929
3930 s = bfd_make_section_with_flags (abfd,
3931 (bed->default_use_rela_p
3932 ? ".rela.plt" : ".rel.plt"),
3933 flags | SEC_READONLY);
3934 if (s == NULL
3935 || ! bfd_set_section_alignment (abfd, s, ptralign))
3936 return FALSE;
3937
3938 if (! _bfd_mn10300_elf_create_got_section (abfd, info))
3939 return FALSE;
3940
3941 {
3942 const char * secname;
3943 char * relname;
3944 flagword secflags;
3945 asection * sec;
3946
3947 for (sec = abfd->sections; sec; sec = sec->next)
3948 {
3949 secflags = bfd_get_section_flags (abfd, sec);
3950 if ((secflags & (SEC_DATA | SEC_LINKER_CREATED))
3951 || ((secflags & SEC_HAS_CONTENTS) != SEC_HAS_CONTENTS))
3952 continue;
3953
3954 secname = bfd_get_section_name (abfd, sec);
3955 relname = (char *) bfd_malloc (strlen (secname) + 6);
3956 strcpy (relname, ".rela");
3957 strcat (relname, secname);
3958
3959 s = bfd_make_section_with_flags (abfd, relname,
3960 flags | SEC_READONLY);
3961 if (s == NULL
3962 || ! bfd_set_section_alignment (abfd, s, ptralign))
3963 return FALSE;
3964 }
3965 }
3966
3967 if (bed->want_dynbss)
3968 {
3969 /* The .dynbss section is a place to put symbols which are defined
3970 by dynamic objects, are referenced by regular objects, and are
3971 not functions. We must allocate space for them in the process
3972 image and use a R_*_COPY reloc to tell the dynamic linker to
3973 initialize them at run time. The linker script puts the .dynbss
3974 section into the .bss section of the final image. */
3975 s = bfd_make_section_with_flags (abfd, ".dynbss",
3976 SEC_ALLOC | SEC_LINKER_CREATED);
3977 if (s == NULL)
3978 return FALSE;
3979
3980 /* The .rel[a].bss section holds copy relocs. This section is not
3981 normally needed. We need to create it here, though, so that the
3982 linker will map it to an output section. We can't just create it
3983 only if we need it, because we will not know whether we need it
3984 until we have seen all the input files, and the first time the
3985 main linker code calls BFD after examining all the input files
3986 (size_dynamic_sections) the input sections have already been
3987 mapped to the output sections. If the section turns out not to
3988 be needed, we can discard it later. We will never need this
3989 section when generating a shared object, since they do not use
3990 copy relocs. */
3991 if (! info->shared)
3992 {
3993 s = bfd_make_section_with_flags (abfd,
3994 (bed->default_use_rela_p
3995 ? ".rela.bss" : ".rel.bss"),
3996 flags | SEC_READONLY);
3997 if (s == NULL
3998 || ! bfd_set_section_alignment (abfd, s, ptralign))
3999 return FALSE;
4000 }
4001 }
4002
4003 return TRUE;
4004 }
4005 \f
4006 /* Adjust a symbol defined by a dynamic object and referenced by a
4007 regular object. The current definition is in some section of the
4008 dynamic object, but we're not including those sections. We have to
4009 change the definition to something the rest of the link can
4010 understand. */
4011
4012 static bfd_boolean
4013 _bfd_mn10300_elf_adjust_dynamic_symbol (info, h)
4014 struct bfd_link_info * info;
4015 struct elf_link_hash_entry * h;
4016 {
4017 bfd * dynobj;
4018 asection * s;
4019 unsigned int power_of_two;
4020
4021 dynobj = elf_hash_table (info)->dynobj;
4022
4023 /* Make sure we know what is going on here. */
4024 BFD_ASSERT (dynobj != NULL
4025 && (h->needs_plt
4026 || h->u.weakdef != NULL
4027 || (h->def_dynamic
4028 && h->ref_regular
4029 && !h->def_regular)));
4030
4031 /* If this is a function, put it in the procedure linkage table. We
4032 will fill in the contents of the procedure linkage table later,
4033 when we know the address of the .got section. */
4034 if (h->type == STT_FUNC
4035 || h->needs_plt)
4036 {
4037 if (! info->shared
4038 && !h->def_dynamic
4039 && !h->ref_dynamic)
4040 {
4041 /* This case can occur if we saw a PLT reloc in an input
4042 file, but the symbol was never referred to by a dynamic
4043 object. In such a case, we don't actually need to build
4044 a procedure linkage table, and we can just do a REL32
4045 reloc instead. */
4046 BFD_ASSERT (h->needs_plt);
4047 return TRUE;
4048 }
4049
4050 /* Make sure this symbol is output as a dynamic symbol. */
4051 if (h->dynindx == -1)
4052 {
4053 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4054 return FALSE;
4055 }
4056
4057 s = bfd_get_section_by_name (dynobj, ".plt");
4058 BFD_ASSERT (s != NULL);
4059
4060 /* If this is the first .plt entry, make room for the special
4061 first entry. */
4062 if (s->size == 0)
4063 s->size += elf_mn10300_sizeof_plt0 (info);
4064
4065 /* If this symbol is not defined in a regular file, and we are
4066 not generating a shared library, then set the symbol to this
4067 location in the .plt. This is required to make function
4068 pointers compare as equal between the normal executable and
4069 the shared library. */
4070 if (! info->shared
4071 && !h->def_regular)
4072 {
4073 h->root.u.def.section = s;
4074 h->root.u.def.value = s->size;
4075 }
4076
4077 h->plt.offset = s->size;
4078
4079 /* Make room for this entry. */
4080 s->size += elf_mn10300_sizeof_plt (info);
4081
4082 /* We also need to make an entry in the .got.plt section, which
4083 will be placed in the .got section by the linker script. */
4084
4085 s = bfd_get_section_by_name (dynobj, ".got.plt");
4086 BFD_ASSERT (s != NULL);
4087 s->size += 4;
4088
4089 /* We also need to make an entry in the .rela.plt section. */
4090
4091 s = bfd_get_section_by_name (dynobj, ".rela.plt");
4092 BFD_ASSERT (s != NULL);
4093 s->size += sizeof (Elf32_External_Rela);
4094
4095 return TRUE;
4096 }
4097
4098 /* If this is a weak symbol, and there is a real definition, the
4099 processor independent code will have arranged for us to see the
4100 real definition first, and we can just use the same value. */
4101 if (h->u.weakdef != NULL)
4102 {
4103 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4104 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4105 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4106 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4107 return TRUE;
4108 }
4109
4110 /* This is a reference to a symbol defined by a dynamic object which
4111 is not a function. */
4112
4113 /* If we are creating a shared library, we must presume that the
4114 only references to the symbol are via the global offset table.
4115 For such cases we need not do anything here; the relocations will
4116 be handled correctly by relocate_section. */
4117 if (info->shared)
4118 return TRUE;
4119
4120 /* If there are no references to this symbol that do not use the
4121 GOT, we don't need to generate a copy reloc. */
4122 if (!h->non_got_ref)
4123 return TRUE;
4124
4125 /* We must allocate the symbol in our .dynbss section, which will
4126 become part of the .bss section of the executable. There will be
4127 an entry for this symbol in the .dynsym section. The dynamic
4128 object will contain position independent code, so all references
4129 from the dynamic object to this symbol will go through the global
4130 offset table. The dynamic linker will use the .dynsym entry to
4131 determine the address it must put in the global offset table, so
4132 both the dynamic object and the regular object will refer to the
4133 same memory location for the variable. */
4134
4135 s = bfd_get_section_by_name (dynobj, ".dynbss");
4136 BFD_ASSERT (s != NULL);
4137
4138 /* We must generate a R_MN10300_COPY reloc to tell the dynamic linker to
4139 copy the initial value out of the dynamic object and into the
4140 runtime process image. We need to remember the offset into the
4141 .rela.bss section we are going to use. */
4142 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4143 {
4144 asection * srel;
4145
4146 srel = bfd_get_section_by_name (dynobj, ".rela.bss");
4147 BFD_ASSERT (srel != NULL);
4148 srel->size += sizeof (Elf32_External_Rela);
4149 h->needs_copy = 1;
4150 }
4151
4152 /* We need to figure out the alignment required for this symbol. I
4153 have no idea how ELF linkers handle this. */
4154 power_of_two = bfd_log2 (h->size);
4155 if (power_of_two > 3)
4156 power_of_two = 3;
4157
4158 /* Apply the required alignment. */
4159 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
4160 if (power_of_two > bfd_get_section_alignment (dynobj, s))
4161 {
4162 if (! bfd_set_section_alignment (dynobj, s, power_of_two))
4163 return FALSE;
4164 }
4165
4166 /* Define the symbol as being at this point in the section. */
4167 h->root.u.def.section = s;
4168 h->root.u.def.value = s->size;
4169
4170 /* Increment the section size to make room for the symbol. */
4171 s->size += h->size;
4172
4173 return TRUE;
4174 }
4175
4176 /* Set the sizes of the dynamic sections. */
4177
4178 static bfd_boolean
4179 _bfd_mn10300_elf_size_dynamic_sections (output_bfd, info)
4180 bfd * output_bfd;
4181 struct bfd_link_info * info;
4182 {
4183 bfd * dynobj;
4184 asection * s;
4185 bfd_boolean plt;
4186 bfd_boolean relocs;
4187 bfd_boolean reltext;
4188
4189 dynobj = elf_hash_table (info)->dynobj;
4190 BFD_ASSERT (dynobj != NULL);
4191
4192 if (elf_hash_table (info)->dynamic_sections_created)
4193 {
4194 /* Set the contents of the .interp section to the interpreter. */
4195 if (info->executable)
4196 {
4197 s = bfd_get_section_by_name (dynobj, ".interp");
4198 BFD_ASSERT (s != NULL);
4199 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4200 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
4201 }
4202 }
4203 else
4204 {
4205 /* We may have created entries in the .rela.got section.
4206 However, if we are not creating the dynamic sections, we will
4207 not actually use these entries. Reset the size of .rela.got,
4208 which will cause it to get stripped from the output file
4209 below. */
4210 s = bfd_get_section_by_name (dynobj, ".rela.got");
4211 if (s != NULL)
4212 s->size = 0;
4213 }
4214
4215 /* The check_relocs and adjust_dynamic_symbol entry points have
4216 determined the sizes of the various dynamic sections. Allocate
4217 memory for them. */
4218 plt = FALSE;
4219 relocs = FALSE;
4220 reltext = FALSE;
4221 for (s = dynobj->sections; s != NULL; s = s->next)
4222 {
4223 const char * name;
4224 bfd_boolean strip;
4225
4226 if ((s->flags & SEC_LINKER_CREATED) == 0)
4227 continue;
4228
4229 /* It's OK to base decisions on the section name, because none
4230 of the dynobj section names depend upon the input files. */
4231 name = bfd_get_section_name (dynobj, s);
4232
4233 strip = FALSE;
4234
4235 if (strcmp (name, ".plt") == 0)
4236 {
4237 if (s->size == 0)
4238 /* Strip this section if we don't need it; see the
4239 comment below. */
4240 strip = TRUE;
4241 else
4242 /* Remember whether there is a PLT. */
4243 plt = TRUE;
4244 }
4245 else if (strncmp (name, ".rela", 5) == 0)
4246 {
4247 if (s->size == 0)
4248 {
4249 /* If we don't need this section, strip it from the
4250 output file. This is mostly to handle .rela.bss and
4251 .rela.plt. We must create both sections in
4252 create_dynamic_sections, because they must be created
4253 before the linker maps input sections to output
4254 sections. The linker does that before
4255 adjust_dynamic_symbol is called, and it is that
4256 function which decides whether anything needs to go
4257 into these sections. */
4258 strip = TRUE;
4259 }
4260 else
4261 {
4262 asection * target;
4263
4264 /* Remember whether there are any reloc sections other
4265 than .rela.plt. */
4266 if (strcmp (name, ".rela.plt") != 0)
4267 {
4268 const char * outname;
4269
4270 relocs = TRUE;
4271
4272 /* If this relocation section applies to a read only
4273 section, then we probably need a DT_TEXTREL
4274 entry. The entries in the .rela.plt section
4275 really apply to the .got section, which we
4276 created ourselves and so know is not readonly. */
4277 outname = bfd_get_section_name (output_bfd,
4278 s->output_section);
4279 target = bfd_get_section_by_name (output_bfd, outname + 5);
4280 if (target != NULL
4281 && (target->flags & SEC_READONLY) != 0
4282 && (target->flags & SEC_ALLOC) != 0)
4283 reltext = TRUE;
4284 }
4285
4286 /* We use the reloc_count field as a counter if we need
4287 to copy relocs into the output file. */
4288 s->reloc_count = 0;
4289 }
4290 }
4291 else if (strncmp (name, ".got", 4) != 0)
4292 /* It's not one of our sections, so don't allocate space. */
4293 continue;
4294
4295 if (strip)
4296 {
4297 s->flags |= SEC_EXCLUDE;
4298 continue;
4299 }
4300
4301 /* Allocate memory for the section contents. We use bfd_zalloc
4302 here in case unused entries are not reclaimed before the
4303 section's contents are written out. This should not happen,
4304 but this way if it does, we get a R_MN10300_NONE reloc
4305 instead of garbage. */
4306 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
4307 if (s->contents == NULL && s->size != 0)
4308 return FALSE;
4309 }
4310
4311 if (elf_hash_table (info)->dynamic_sections_created)
4312 {
4313 /* Add some entries to the .dynamic section. We fill in the
4314 values later, in _bfd_mn10300_elf_finish_dynamic_sections,
4315 but we must add the entries now so that we get the correct
4316 size for the .dynamic section. The DT_DEBUG entry is filled
4317 in by the dynamic linker and used by the debugger. */
4318 if (! info->shared)
4319 {
4320 if (!_bfd_elf_add_dynamic_entry (info, DT_DEBUG, 0))
4321 return FALSE;
4322 }
4323
4324 if (plt)
4325 {
4326 if (!_bfd_elf_add_dynamic_entry (info, DT_PLTGOT, 0)
4327 || !_bfd_elf_add_dynamic_entry (info, DT_PLTRELSZ, 0)
4328 || !_bfd_elf_add_dynamic_entry (info, DT_PLTREL, DT_RELA)
4329 || !_bfd_elf_add_dynamic_entry (info, DT_JMPREL, 0))
4330 return FALSE;
4331 }
4332
4333 if (relocs)
4334 {
4335 if (!_bfd_elf_add_dynamic_entry (info, DT_RELA, 0)
4336 || !_bfd_elf_add_dynamic_entry (info, DT_RELASZ, 0)
4337 || !_bfd_elf_add_dynamic_entry (info, DT_RELAENT,
4338 sizeof (Elf32_External_Rela)))
4339 return FALSE;
4340 }
4341
4342 if (reltext)
4343 {
4344 if (!_bfd_elf_add_dynamic_entry (info, DT_TEXTREL, 0))
4345 return FALSE;
4346 }
4347 }
4348
4349 return TRUE;
4350 }
4351
4352 /* Finish up dynamic symbol handling. We set the contents of various
4353 dynamic sections here. */
4354
4355 static bfd_boolean
4356 _bfd_mn10300_elf_finish_dynamic_symbol (output_bfd, info, h, sym)
4357 bfd * output_bfd;
4358 struct bfd_link_info * info;
4359 struct elf_link_hash_entry * h;
4360 Elf_Internal_Sym * sym;
4361 {
4362 bfd * dynobj;
4363
4364 dynobj = elf_hash_table (info)->dynobj;
4365
4366 if (h->plt.offset != (bfd_vma) -1)
4367 {
4368 asection * splt;
4369 asection * sgot;
4370 asection * srel;
4371 bfd_vma plt_index;
4372 bfd_vma got_offset;
4373 Elf_Internal_Rela rel;
4374
4375 /* This symbol has an entry in the procedure linkage table. Set
4376 it up. */
4377
4378 BFD_ASSERT (h->dynindx != -1);
4379
4380 splt = bfd_get_section_by_name (dynobj, ".plt");
4381 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
4382 srel = bfd_get_section_by_name (dynobj, ".rela.plt");
4383 BFD_ASSERT (splt != NULL && sgot != NULL && srel != NULL);
4384
4385 /* Get the index in the procedure linkage table which
4386 corresponds to this symbol. This is the index of this symbol
4387 in all the symbols for which we are making plt entries. The
4388 first entry in the procedure linkage table is reserved. */
4389 plt_index = ((h->plt.offset - elf_mn10300_sizeof_plt0 (info))
4390 / elf_mn10300_sizeof_plt (info));
4391
4392 /* Get the offset into the .got table of the entry that
4393 corresponds to this function. Each .got entry is 4 bytes.
4394 The first three are reserved. */
4395 got_offset = (plt_index + 3) * 4;
4396
4397 /* Fill in the entry in the procedure linkage table. */
4398 if (! info->shared)
4399 {
4400 memcpy (splt->contents + h->plt.offset, elf_mn10300_plt_entry,
4401 elf_mn10300_sizeof_plt (info));
4402 bfd_put_32 (output_bfd,
4403 (sgot->output_section->vma
4404 + sgot->output_offset
4405 + got_offset),
4406 (splt->contents + h->plt.offset
4407 + elf_mn10300_plt_symbol_offset (info)));
4408
4409 bfd_put_32 (output_bfd,
4410 (1 - h->plt.offset - elf_mn10300_plt_plt0_offset (info)),
4411 (splt->contents + h->plt.offset
4412 + elf_mn10300_plt_plt0_offset (info)));
4413 }
4414 else
4415 {
4416 memcpy (splt->contents + h->plt.offset, elf_mn10300_pic_plt_entry,
4417 elf_mn10300_sizeof_plt (info));
4418
4419 bfd_put_32 (output_bfd, got_offset,
4420 (splt->contents + h->plt.offset
4421 + elf_mn10300_plt_symbol_offset (info)));
4422 }
4423
4424 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
4425 (splt->contents + h->plt.offset
4426 + elf_mn10300_plt_reloc_offset (info)));
4427
4428 /* Fill in the entry in the global offset table. */
4429 bfd_put_32 (output_bfd,
4430 (splt->output_section->vma
4431 + splt->output_offset
4432 + h->plt.offset
4433 + elf_mn10300_plt_temp_offset (info)),
4434 sgot->contents + got_offset);
4435
4436 /* Fill in the entry in the .rela.plt section. */
4437 rel.r_offset = (sgot->output_section->vma
4438 + sgot->output_offset
4439 + got_offset);
4440 rel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_JMP_SLOT);
4441 rel.r_addend = 0;
4442 bfd_elf32_swap_reloca_out (output_bfd, &rel,
4443 (bfd_byte *) ((Elf32_External_Rela *) srel->contents
4444 + plt_index));
4445
4446 if (!h->def_regular)
4447 /* Mark the symbol as undefined, rather than as defined in
4448 the .plt section. Leave the value alone. */
4449 sym->st_shndx = SHN_UNDEF;
4450 }
4451
4452 if (h->got.offset != (bfd_vma) -1)
4453 {
4454 asection * sgot;
4455 asection * srel;
4456 Elf_Internal_Rela rel;
4457
4458 /* This symbol has an entry in the global offset table. Set it up. */
4459
4460 sgot = bfd_get_section_by_name (dynobj, ".got");
4461 srel = bfd_get_section_by_name (dynobj, ".rela.got");
4462 BFD_ASSERT (sgot != NULL && srel != NULL);
4463
4464 rel.r_offset = (sgot->output_section->vma
4465 + sgot->output_offset
4466 + (h->got.offset &~ 1));
4467
4468 /* If this is a -Bsymbolic link, and the symbol is defined
4469 locally, we just want to emit a RELATIVE reloc. Likewise if
4470 the symbol was forced to be local because of a version file.
4471 The entry in the global offset table will already have been
4472 initialized in the relocate_section function. */
4473 if (info->shared
4474 && (info->symbolic || h->dynindx == -1)
4475 && h->def_regular)
4476 {
4477 rel.r_info = ELF32_R_INFO (0, R_MN10300_RELATIVE);
4478 rel.r_addend = (h->root.u.def.value
4479 + h->root.u.def.section->output_section->vma
4480 + h->root.u.def.section->output_offset);
4481 }
4482 else
4483 {
4484 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
4485 rel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_GLOB_DAT);
4486 rel.r_addend = 0;
4487 }
4488
4489 bfd_elf32_swap_reloca_out (output_bfd, &rel,
4490 (bfd_byte *) ((Elf32_External_Rela *) srel->contents
4491 + srel->reloc_count));
4492 ++ srel->reloc_count;
4493 }
4494
4495 if (h->needs_copy)
4496 {
4497 asection * s;
4498 Elf_Internal_Rela rel;
4499
4500 /* This symbol needs a copy reloc. Set it up. */
4501 BFD_ASSERT (h->dynindx != -1
4502 && (h->root.type == bfd_link_hash_defined
4503 || h->root.type == bfd_link_hash_defweak));
4504
4505 s = bfd_get_section_by_name (h->root.u.def.section->owner,
4506 ".rela.bss");
4507 BFD_ASSERT (s != NULL);
4508
4509 rel.r_offset = (h->root.u.def.value
4510 + h->root.u.def.section->output_section->vma
4511 + h->root.u.def.section->output_offset);
4512 rel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_COPY);
4513 rel.r_addend = 0;
4514 bfd_elf32_swap_reloca_out (output_bfd, &rel,
4515 (bfd_byte *) ((Elf32_External_Rela *) s->contents
4516 + s->reloc_count));
4517 ++ s->reloc_count;
4518 }
4519
4520 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
4521 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
4522 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
4523 sym->st_shndx = SHN_ABS;
4524
4525 return TRUE;
4526 }
4527
4528 /* Finish up the dynamic sections. */
4529
4530 static bfd_boolean
4531 _bfd_mn10300_elf_finish_dynamic_sections (output_bfd, info)
4532 bfd * output_bfd;
4533 struct bfd_link_info * info;
4534 {
4535 bfd * dynobj;
4536 asection * sgot;
4537 asection * sdyn;
4538
4539 dynobj = elf_hash_table (info)->dynobj;
4540
4541 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
4542 BFD_ASSERT (sgot != NULL);
4543 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
4544
4545 if (elf_hash_table (info)->dynamic_sections_created)
4546 {
4547 asection * splt;
4548 Elf32_External_Dyn * dyncon;
4549 Elf32_External_Dyn * dynconend;
4550
4551 BFD_ASSERT (sdyn != NULL);
4552
4553 dyncon = (Elf32_External_Dyn *) sdyn->contents;
4554 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
4555
4556 for (; dyncon < dynconend; dyncon++)
4557 {
4558 Elf_Internal_Dyn dyn;
4559 const char * name;
4560 asection * s;
4561
4562 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4563
4564 switch (dyn.d_tag)
4565 {
4566 default:
4567 break;
4568
4569 case DT_PLTGOT:
4570 name = ".got";
4571 goto get_vma;
4572
4573 case DT_JMPREL:
4574 name = ".rela.plt";
4575 get_vma:
4576 s = bfd_get_section_by_name (output_bfd, name);
4577 BFD_ASSERT (s != NULL);
4578 dyn.d_un.d_ptr = s->vma;
4579 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4580 break;
4581
4582 case DT_PLTRELSZ:
4583 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
4584 BFD_ASSERT (s != NULL);
4585 dyn.d_un.d_val = s->size;
4586 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4587 break;
4588
4589 case DT_RELASZ:
4590 /* My reading of the SVR4 ABI indicates that the
4591 procedure linkage table relocs (DT_JMPREL) should be
4592 included in the overall relocs (DT_RELA). This is
4593 what Solaris does. However, UnixWare can not handle
4594 that case. Therefore, we override the DT_RELASZ entry
4595 here to make it not include the JMPREL relocs. Since
4596 the linker script arranges for .rela.plt to follow all
4597 other relocation sections, we don't have to worry
4598 about changing the DT_RELA entry. */
4599 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
4600 if (s != NULL)
4601 dyn.d_un.d_val -= s->size;
4602 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4603 break;
4604 }
4605 }
4606
4607 /* Fill in the first entry in the procedure linkage table. */
4608 splt = bfd_get_section_by_name (dynobj, ".plt");
4609 if (splt && splt->size > 0)
4610 {
4611 if (info->shared)
4612 {
4613 memcpy (splt->contents, elf_mn10300_pic_plt_entry,
4614 elf_mn10300_sizeof_plt (info));
4615 }
4616 else
4617 {
4618 memcpy (splt->contents, elf_mn10300_plt0_entry, PLT0_ENTRY_SIZE);
4619 bfd_put_32 (output_bfd,
4620 sgot->output_section->vma + sgot->output_offset + 4,
4621 splt->contents + elf_mn10300_plt0_gotid_offset (info));
4622 bfd_put_32 (output_bfd,
4623 sgot->output_section->vma + sgot->output_offset + 8,
4624 splt->contents + elf_mn10300_plt0_linker_offset (info));
4625 }
4626
4627 /* UnixWare sets the entsize of .plt to 4, although that doesn't
4628 really seem like the right value. */
4629 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
4630 }
4631 }
4632
4633 /* Fill in the first three entries in the global offset table. */
4634 if (sgot->size > 0)
4635 {
4636 if (sdyn == NULL)
4637 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
4638 else
4639 bfd_put_32 (output_bfd,
4640 sdyn->output_section->vma + sdyn->output_offset,
4641 sgot->contents);
4642 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
4643 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
4644 }
4645
4646 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
4647
4648 return TRUE;
4649 }
4650
4651 /* Classify relocation types, such that combreloc can sort them
4652 properly. */
4653
4654 static enum elf_reloc_type_class
4655 _bfd_mn10300_elf_reloc_type_class (const Elf_Internal_Rela *rela)
4656 {
4657 switch ((int) ELF32_R_TYPE (rela->r_info))
4658 {
4659 case R_MN10300_RELATIVE:
4660 return reloc_class_relative;
4661 case R_MN10300_JMP_SLOT:
4662 return reloc_class_plt;
4663 case R_MN10300_COPY:
4664 return reloc_class_copy;
4665 default:
4666 return reloc_class_normal;
4667 }
4668 }
4669
4670 #ifndef ELF_ARCH
4671 #define TARGET_LITTLE_SYM bfd_elf32_mn10300_vec
4672 #define TARGET_LITTLE_NAME "elf32-mn10300"
4673 #define ELF_ARCH bfd_arch_mn10300
4674 #define ELF_MACHINE_CODE EM_MN10300
4675 #define ELF_MACHINE_ALT1 EM_CYGNUS_MN10300
4676 #define ELF_MAXPAGESIZE 0x1000
4677 #endif
4678
4679 #define elf_info_to_howto mn10300_info_to_howto
4680 #define elf_info_to_howto_rel 0
4681 #define elf_backend_can_gc_sections 1
4682 #define elf_backend_rela_normal 1
4683 #define elf_backend_check_relocs mn10300_elf_check_relocs
4684 #define elf_backend_gc_mark_hook mn10300_elf_gc_mark_hook
4685 #define elf_backend_relocate_section mn10300_elf_relocate_section
4686 #define bfd_elf32_bfd_relax_section mn10300_elf_relax_section
4687 #define bfd_elf32_bfd_get_relocated_section_contents \
4688 mn10300_elf_get_relocated_section_contents
4689 #define bfd_elf32_bfd_link_hash_table_create \
4690 elf32_mn10300_link_hash_table_create
4691 #define bfd_elf32_bfd_link_hash_table_free \
4692 elf32_mn10300_link_hash_table_free
4693
4694 #ifndef elf_symbol_leading_char
4695 #define elf_symbol_leading_char '_'
4696 #endif
4697
4698 /* So we can set bits in e_flags. */
4699 #define elf_backend_final_write_processing \
4700 _bfd_mn10300_elf_final_write_processing
4701 #define elf_backend_object_p _bfd_mn10300_elf_object_p
4702
4703 #define bfd_elf32_bfd_merge_private_bfd_data \
4704 _bfd_mn10300_elf_merge_private_bfd_data
4705
4706 #define elf_backend_can_gc_sections 1
4707 #define elf_backend_create_dynamic_sections \
4708 _bfd_mn10300_elf_create_dynamic_sections
4709 #define elf_backend_adjust_dynamic_symbol \
4710 _bfd_mn10300_elf_adjust_dynamic_symbol
4711 #define elf_backend_size_dynamic_sections \
4712 _bfd_mn10300_elf_size_dynamic_sections
4713 #define elf_backend_finish_dynamic_symbol \
4714 _bfd_mn10300_elf_finish_dynamic_symbol
4715 #define elf_backend_finish_dynamic_sections \
4716 _bfd_mn10300_elf_finish_dynamic_sections
4717
4718 #define elf_backend_reloc_type_class \
4719 _bfd_mn10300_elf_reloc_type_class
4720
4721 #define elf_backend_want_got_plt 1
4722 #define elf_backend_plt_readonly 1
4723 #define elf_backend_want_plt_sym 0
4724 #define elf_backend_got_header_size 12
4725
4726 #include "elf32-target.h"
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