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Fix compile time warning by using an unsigned type.
[binutils.git] / bfd / elf-m10300.c
blob4470387890e5d6f4d70e0227300cb459e694a6ad
1 /* Matsushita 10300 specific support for 32-bit ELF
2 Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
3 Free Software Foundation, Inc.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
20
21 #include "bfd.h"
22 #include "sysdep.h"
23 #include "libbfd.h"
24 #include "elf-bfd.h"
25 #include "elf/mn10300.h"
26
27 static bfd_reloc_status_type mn10300_elf_final_link_relocate
28 PARAMS ((reloc_howto_type *, bfd *, bfd *, asection *, bfd_byte *,
29 bfd_vma, bfd_vma, bfd_vma,
30 struct elf_link_hash_entry *, unsigned long, struct bfd_link_info *,
31 asection *, int));
32 static bfd_boolean mn10300_elf_relocate_section
33 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
34 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
35 static bfd_boolean mn10300_elf_relax_section
36 PARAMS ((bfd *, asection *, struct bfd_link_info *, bfd_boolean *));
37 static bfd_byte * mn10300_elf_get_relocated_section_contents
38 PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_order *,
39 bfd_byte *, bfd_boolean, asymbol **));
40 static unsigned long elf_mn10300_mach
41 PARAMS ((flagword));
42 void _bfd_mn10300_elf_final_write_processing
43 PARAMS ((bfd *, bfd_boolean));
44 bfd_boolean _bfd_mn10300_elf_object_p
45 PARAMS ((bfd *));
46 bfd_boolean _bfd_mn10300_elf_merge_private_bfd_data
47 PARAMS ((bfd *,bfd *));
48
49 /* The mn10300 linker needs to keep track of the number of relocs that
50 it decides to copy in check_relocs for each symbol. This is so
51 that it can discard PC relative relocs if it doesn't need them when
52 linking with -Bsymbolic. We store the information in a field
53 extending the regular ELF linker hash table. */
54
55 struct elf32_mn10300_link_hash_entry {
56 /* The basic elf link hash table entry. */
57 struct elf_link_hash_entry root;
58
59 /* For function symbols, the number of times this function is
60 called directly (ie by name). */
61 unsigned int direct_calls;
62
63 /* For function symbols, the size of this function's stack
64 (if <= 255 bytes). We stuff this into "call" instructions
65 to this target when it's valid and profitable to do so.
66
67 This does not include stack allocated by movm! */
68 unsigned char stack_size;
69
70 /* For function symbols, arguments (if any) for movm instruction
71 in the prologue. We stuff this value into "call" instructions
72 to the target when it's valid and profitable to do so. */
73 unsigned char movm_args;
74
75 /* For function symbols, the amount of stack space that would be allocated
76 by the movm instruction. This is redundant with movm_args, but we
77 add it to the hash table to avoid computing it over and over. */
78 unsigned char movm_stack_size;
79
80 /* When set, convert all "call" instructions to this target into "calls"
81 instructions. */
82 #define MN10300_CONVERT_CALL_TO_CALLS 0x1
83
84 /* Used to mark functions which have had redundant parts of their
85 prologue deleted. */
86 #define MN10300_DELETED_PROLOGUE_BYTES 0x2
87 unsigned char flags;
88 };
89
90 /* We derive a hash table from the main elf linker hash table so
91 we can store state variables and a secondary hash table without
92 resorting to global variables. */
93 struct elf32_mn10300_link_hash_table {
94 /* The main hash table. */
95 struct elf_link_hash_table root;
96
97 /* A hash table for static functions. We could derive a new hash table
98 instead of using the full elf32_mn10300_link_hash_table if we wanted
99 to save some memory. */
100 struct elf32_mn10300_link_hash_table *static_hash_table;
101
102 /* Random linker state flags. */
103 #define MN10300_HASH_ENTRIES_INITIALIZED 0x1
104 char flags;
105 };
106
107 /* For MN10300 linker hash table. */
108
109 /* Get the MN10300 ELF linker hash table from a link_info structure. */
110
111 #define elf32_mn10300_hash_table(p) \
112 ((struct elf32_mn10300_link_hash_table *) ((p)->hash))
113
114 #define elf32_mn10300_link_hash_traverse(table, func, info) \
115 (elf_link_hash_traverse \
116 (&(table)->root, \
117 (bfd_boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
118 (info)))
119
120 static struct bfd_hash_entry *elf32_mn10300_link_hash_newfunc
121 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
122 static struct bfd_link_hash_table *elf32_mn10300_link_hash_table_create
123 PARAMS ((bfd *));
124 static void elf32_mn10300_link_hash_table_free
125 PARAMS ((struct bfd_link_hash_table *));
126
127 static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
128 PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
129 static void mn10300_info_to_howto
130 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
131 static bfd_boolean mn10300_elf_check_relocs
132 PARAMS ((bfd *, struct bfd_link_info *, asection *,
133 const Elf_Internal_Rela *));
134 static asection *mn10300_elf_gc_mark_hook
135 PARAMS ((asection *, struct bfd_link_info *info, Elf_Internal_Rela *,
136 struct elf_link_hash_entry *, Elf_Internal_Sym *));
137 static bfd_boolean mn10300_elf_relax_delete_bytes
138 PARAMS ((bfd *, asection *, bfd_vma, int));
139 static bfd_boolean mn10300_elf_symbol_address_p
140 PARAMS ((bfd *, asection *, Elf_Internal_Sym *, bfd_vma));
141 static bfd_boolean elf32_mn10300_finish_hash_table_entry
142 PARAMS ((struct bfd_hash_entry *, PTR));
143 static void compute_function_info
144 PARAMS ((bfd *, struct elf32_mn10300_link_hash_entry *,
145 bfd_vma, unsigned char *));
146
147 static bfd_boolean _bfd_mn10300_elf_create_got_section
148 PARAMS ((bfd *, struct bfd_link_info *));
149 static bfd_boolean _bfd_mn10300_elf_create_dynamic_sections
150 PARAMS ((bfd *, struct bfd_link_info *));
151 static bfd_boolean _bfd_mn10300_elf_adjust_dynamic_symbol
152 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
153 static bfd_boolean _bfd_mn10300_elf_size_dynamic_sections
154 PARAMS ((bfd *, struct bfd_link_info *));
155 static bfd_boolean _bfd_mn10300_elf_finish_dynamic_symbol
156 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
157 Elf_Internal_Sym *));
158 static bfd_boolean _bfd_mn10300_elf_finish_dynamic_sections
159 PARAMS ((bfd *, struct bfd_link_info *));
160
161 static reloc_howto_type elf_mn10300_howto_table[] = {
162 /* Dummy relocation. Does nothing. */
163 HOWTO (R_MN10300_NONE,
164 0,
165 2,
166 16,
167 FALSE,
168 0,
169 complain_overflow_bitfield,
170 bfd_elf_generic_reloc,
171 "R_MN10300_NONE",
172 FALSE,
173 0,
174 0,
175 FALSE),
176 /* Standard 32 bit reloc. */
177 HOWTO (R_MN10300_32,
178 0,
179 2,
180 32,
181 FALSE,
182 0,
183 complain_overflow_bitfield,
184 bfd_elf_generic_reloc,
185 "R_MN10300_32",
186 FALSE,
187 0xffffffff,
188 0xffffffff,
189 FALSE),
190 /* Standard 16 bit reloc. */
191 HOWTO (R_MN10300_16,
192 0,
193 1,
194 16,
195 FALSE,
196 0,
197 complain_overflow_bitfield,
198 bfd_elf_generic_reloc,
199 "R_MN10300_16",
200 FALSE,
201 0xffff,
202 0xffff,
203 FALSE),
204 /* Standard 8 bit reloc. */
205 HOWTO (R_MN10300_8,
206 0,
207 0,
208 8,
209 FALSE,
210 0,
211 complain_overflow_bitfield,
212 bfd_elf_generic_reloc,
213 "R_MN10300_8",
214 FALSE,
215 0xff,
216 0xff,
217 FALSE),
218 /* Standard 32bit pc-relative reloc. */
219 HOWTO (R_MN10300_PCREL32,
220 0,
221 2,
222 32,
223 TRUE,
224 0,
225 complain_overflow_bitfield,
226 bfd_elf_generic_reloc,
227 "R_MN10300_PCREL32",
228 FALSE,
229 0xffffffff,
230 0xffffffff,
231 TRUE),
232 /* Standard 16bit pc-relative reloc. */
233 HOWTO (R_MN10300_PCREL16,
234 0,
235 1,
236 16,
237 TRUE,
238 0,
239 complain_overflow_bitfield,
240 bfd_elf_generic_reloc,
241 "R_MN10300_PCREL16",
242 FALSE,
243 0xffff,
244 0xffff,
245 TRUE),
246 /* Standard 8 pc-relative reloc. */
247 HOWTO (R_MN10300_PCREL8,
248 0,
249 0,
250 8,
251 TRUE,
252 0,
253 complain_overflow_bitfield,
254 bfd_elf_generic_reloc,
255 "R_MN10300_PCREL8",
256 FALSE,
257 0xff,
258 0xff,
259 TRUE),
260
261 /* GNU extension to record C++ vtable hierarchy */
262 HOWTO (R_MN10300_GNU_VTINHERIT, /* type */
263 0, /* rightshift */
264 0, /* size (0 = byte, 1 = short, 2 = long) */
265 0, /* bitsize */
266 FALSE, /* pc_relative */
267 0, /* bitpos */
268 complain_overflow_dont, /* complain_on_overflow */
269 NULL, /* special_function */
270 "R_MN10300_GNU_VTINHERIT", /* name */
271 FALSE, /* partial_inplace */
272 0, /* src_mask */
273 0, /* dst_mask */
274 FALSE), /* pcrel_offset */
275
276 /* GNU extension to record C++ vtable member usage */
277 HOWTO (R_MN10300_GNU_VTENTRY, /* type */
278 0, /* rightshift */
279 0, /* size (0 = byte, 1 = short, 2 = long) */
280 0, /* bitsize */
281 FALSE, /* pc_relative */
282 0, /* bitpos */
283 complain_overflow_dont, /* complain_on_overflow */
284 NULL, /* special_function */
285 "R_MN10300_GNU_VTENTRY", /* name */
286 FALSE, /* partial_inplace */
287 0, /* src_mask */
288 0, /* dst_mask */
289 FALSE), /* pcrel_offset */
290
291 /* Standard 24 bit reloc. */
292 HOWTO (R_MN10300_24,
293 0,
294 2,
295 24,
296 FALSE,
297 0,
298 complain_overflow_bitfield,
299 bfd_elf_generic_reloc,
300 "R_MN10300_24",
301 FALSE,
302 0xffffff,
303 0xffffff,
304 FALSE),
305 HOWTO (R_MN10300_GOTPC32, /* type */
306 0, /* rightshift */
307 2, /* size (0 = byte, 1 = short, 2 = long) */
308 32, /* bitsize */
309 TRUE, /* pc_relative */
310 0, /* bitpos */
311 complain_overflow_bitfield, /* complain_on_overflow */
312 bfd_elf_generic_reloc, /* */
313 "R_MN10300_GOTPC32", /* name */
314 FALSE, /* partial_inplace */
315 0xffffffff, /* src_mask */
316 0xffffffff, /* dst_mask */
317 TRUE), /* pcrel_offset */
318
319 HOWTO (R_MN10300_GOTPC16, /* type */
320 0, /* rightshift */
321 1, /* size (0 = byte, 1 = short, 2 = long) */
322 16, /* bitsize */
323 TRUE, /* pc_relative */
324 0, /* bitpos */
325 complain_overflow_bitfield, /* complain_on_overflow */
326 bfd_elf_generic_reloc, /* */
327 "R_MN10300_GOTPC16", /* name */
328 FALSE, /* partial_inplace */
329 0xffff, /* src_mask */
330 0xffff, /* dst_mask */
331 TRUE), /* pcrel_offset */
332
333 HOWTO (R_MN10300_GOTOFF32, /* type */
334 0, /* rightshift */
335 2, /* size (0 = byte, 1 = short, 2 = long) */
336 32, /* bitsize */
337 FALSE, /* pc_relative */
338 0, /* bitpos */
339 complain_overflow_bitfield, /* complain_on_overflow */
340 bfd_elf_generic_reloc, /* */
341 "R_MN10300_GOTOFF32", /* name */
342 FALSE, /* partial_inplace */
343 0xffffffff, /* src_mask */
344 0xffffffff, /* dst_mask */
345 FALSE), /* pcrel_offset */
346
347 HOWTO (R_MN10300_GOTOFF24, /* type */
348 0, /* rightshift */
349 2, /* size (0 = byte, 1 = short, 2 = long) */
350 24, /* bitsize */
351 FALSE, /* pc_relative */
352 0, /* bitpos */
353 complain_overflow_bitfield, /* complain_on_overflow */
354 bfd_elf_generic_reloc, /* */
355 "R_MN10300_GOTOFF24", /* name */
356 FALSE, /* partial_inplace */
357 0xffffff, /* src_mask */
358 0xffffff, /* dst_mask */
359 FALSE), /* pcrel_offset */
360
361 HOWTO (R_MN10300_GOTOFF16, /* type */
362 0, /* rightshift */
363 1, /* size (0 = byte, 1 = short, 2 = long) */
364 16, /* bitsize */
365 FALSE, /* pc_relative */
366 0, /* bitpos */
367 complain_overflow_bitfield, /* complain_on_overflow */
368 bfd_elf_generic_reloc, /* */
369 "R_MN10300_GOTOFF16", /* name */
370 FALSE, /* partial_inplace */
371 0xffff, /* src_mask */
372 0xffff, /* dst_mask */
373 FALSE), /* pcrel_offset */
374
375 HOWTO (R_MN10300_PLT32, /* type */
376 0, /* rightshift */
377 2, /* size (0 = byte, 1 = short, 2 = long) */
378 32, /* bitsize */
379 TRUE, /* pc_relative */
380 0, /* bitpos */
381 complain_overflow_bitfield, /* complain_on_overflow */
382 bfd_elf_generic_reloc, /* */
383 "R_MN10300_PLT32", /* name */
384 FALSE, /* partial_inplace */
385 0xffffffff, /* src_mask */
386 0xffffffff, /* dst_mask */
387 TRUE), /* pcrel_offset */
388
389 HOWTO (R_MN10300_PLT16, /* type */
390 0, /* rightshift */
391 1, /* size (0 = byte, 1 = short, 2 = long) */
392 16, /* bitsize */
393 TRUE, /* pc_relative */
394 0, /* bitpos */
395 complain_overflow_bitfield, /* complain_on_overflow */
396 bfd_elf_generic_reloc, /* */
397 "R_MN10300_PLT16", /* name */
398 FALSE, /* partial_inplace */
399 0xffff, /* src_mask */
400 0xffff, /* dst_mask */
401 TRUE), /* pcrel_offset */
402
403 HOWTO (R_MN10300_GOT32, /* type */
404 0, /* rightshift */
405 2, /* size (0 = byte, 1 = short, 2 = long) */
406 32, /* bitsize */
407 FALSE, /* pc_relative */
408 0, /* bitpos */
409 complain_overflow_bitfield, /* complain_on_overflow */
410 bfd_elf_generic_reloc, /* */
411 "R_MN10300_GOT32", /* name */
412 FALSE, /* partial_inplace */
413 0xffffffff, /* src_mask */
414 0xffffffff, /* dst_mask */
415 FALSE), /* pcrel_offset */
416
417 HOWTO (R_MN10300_GOT24, /* type */
418 0, /* rightshift */
419 2, /* size (0 = byte, 1 = short, 2 = long) */
420 24, /* bitsize */
421 FALSE, /* pc_relative */
422 0, /* bitpos */
423 complain_overflow_bitfield, /* complain_on_overflow */
424 bfd_elf_generic_reloc, /* */
425 "R_MN10300_GOT24", /* name */
426 FALSE, /* partial_inplace */
427 0xffffffff, /* src_mask */
428 0xffffffff, /* dst_mask */
429 FALSE), /* pcrel_offset */
430
431 HOWTO (R_MN10300_GOT16, /* type */
432 0, /* rightshift */
433 1, /* size (0 = byte, 1 = short, 2 = long) */
434 16, /* bitsize */
435 FALSE, /* pc_relative */
436 0, /* bitpos */
437 complain_overflow_bitfield, /* complain_on_overflow */
438 bfd_elf_generic_reloc, /* */
439 "R_MN10300_GOT16", /* name */
440 FALSE, /* partial_inplace */
441 0xffffffff, /* src_mask */
442 0xffffffff, /* dst_mask */
443 FALSE), /* pcrel_offset */
444
445 HOWTO (R_MN10300_COPY, /* type */
446 0, /* rightshift */
447 2, /* size (0 = byte, 1 = short, 2 = long) */
448 32, /* bitsize */
449 FALSE, /* pc_relative */
450 0, /* bitpos */
451 complain_overflow_bitfield, /* complain_on_overflow */
452 bfd_elf_generic_reloc, /* */
453 "R_MN10300_COPY", /* name */
454 FALSE, /* partial_inplace */
455 0xffffffff, /* src_mask */
456 0xffffffff, /* dst_mask */
457 FALSE), /* pcrel_offset */
458
459 HOWTO (R_MN10300_GLOB_DAT, /* type */
460 0, /* rightshift */
461 2, /* size (0 = byte, 1 = short, 2 = long) */
462 32, /* bitsize */
463 FALSE, /* pc_relative */
464 0, /* bitpos */
465 complain_overflow_bitfield, /* complain_on_overflow */
466 bfd_elf_generic_reloc, /* */
467 "R_MN10300_GLOB_DAT", /* name */
468 FALSE, /* partial_inplace */
469 0xffffffff, /* src_mask */
470 0xffffffff, /* dst_mask */
471 FALSE), /* pcrel_offset */
472
473 HOWTO (R_MN10300_JMP_SLOT, /* type */
474 0, /* rightshift */
475 2, /* size (0 = byte, 1 = short, 2 = long) */
476 32, /* bitsize */
477 FALSE, /* pc_relative */
478 0, /* bitpos */
479 complain_overflow_bitfield, /* complain_on_overflow */
480 bfd_elf_generic_reloc, /* */
481 "R_MN10300_JMP_SLOT", /* name */
482 FALSE, /* partial_inplace */
483 0xffffffff, /* src_mask */
484 0xffffffff, /* dst_mask */
485 FALSE), /* pcrel_offset */
486
487 HOWTO (R_MN10300_RELATIVE, /* type */
488 0, /* rightshift */
489 2, /* size (0 = byte, 1 = short, 2 = long) */
490 32, /* bitsize */
491 FALSE, /* pc_relative */
492 0, /* bitpos */
493 complain_overflow_bitfield, /* complain_on_overflow */
494 bfd_elf_generic_reloc, /* */
495 "R_MN10300_RELATIVE", /* name */
496 FALSE, /* partial_inplace */
497 0xffffffff, /* src_mask */
498 0xffffffff, /* dst_mask */
499 FALSE), /* pcrel_offset */
500
501 };
502
503 struct mn10300_reloc_map {
504 bfd_reloc_code_real_type bfd_reloc_val;
505 unsigned char elf_reloc_val;
506 };
507
508 static const struct mn10300_reloc_map mn10300_reloc_map[] = {
509 { BFD_RELOC_NONE, R_MN10300_NONE, },
510 { BFD_RELOC_32, R_MN10300_32, },
511 { BFD_RELOC_16, R_MN10300_16, },
512 { BFD_RELOC_8, R_MN10300_8, },
513 { BFD_RELOC_32_PCREL, R_MN10300_PCREL32, },
514 { BFD_RELOC_16_PCREL, R_MN10300_PCREL16, },
515 { BFD_RELOC_8_PCREL, R_MN10300_PCREL8, },
516 { BFD_RELOC_24, R_MN10300_24, },
517 { BFD_RELOC_VTABLE_INHERIT, R_MN10300_GNU_VTINHERIT },
518 { BFD_RELOC_VTABLE_ENTRY, R_MN10300_GNU_VTENTRY },
519 { BFD_RELOC_32_GOT_PCREL, R_MN10300_GOTPC32 },
520 { BFD_RELOC_16_GOT_PCREL, R_MN10300_GOTPC16 },
521 { BFD_RELOC_32_GOTOFF, R_MN10300_GOTOFF32 },
522 { BFD_RELOC_MN10300_GOTOFF24, R_MN10300_GOTOFF24 },
523 { BFD_RELOC_16_GOTOFF, R_MN10300_GOTOFF16 },
524 { BFD_RELOC_32_PLT_PCREL, R_MN10300_PLT32 },
525 { BFD_RELOC_16_PLT_PCREL, R_MN10300_PLT16 },
526 { BFD_RELOC_MN10300_GOT32, R_MN10300_GOT32 },
527 { BFD_RELOC_MN10300_GOT24, R_MN10300_GOT24 },
528 { BFD_RELOC_MN10300_GOT16, R_MN10300_GOT16 },
529 { BFD_RELOC_MN10300_COPY, R_MN10300_COPY },
530 { BFD_RELOC_MN10300_GLOB_DAT, R_MN10300_GLOB_DAT },
531 { BFD_RELOC_MN10300_JMP_SLOT, R_MN10300_JMP_SLOT },
532 { BFD_RELOC_MN10300_RELATIVE, R_MN10300_RELATIVE },
533 };
534
535 /* Create the GOT section. */
536
537 static bfd_boolean
538 _bfd_mn10300_elf_create_got_section (abfd, info)
539 bfd * abfd;
540 struct bfd_link_info * info;
541 {
542 flagword flags;
543 flagword pltflags;
544 asection * s;
545 struct bfd_link_hash_entry * bh;
546 struct elf_link_hash_entry * h;
547 const struct elf_backend_data * bed = get_elf_backend_data (abfd);
548 int ptralign;
549
550 /* This function may be called more than once. */
551 if (bfd_get_section_by_name (abfd, ".got") != NULL)
552 return TRUE;
553
554 switch (bed->s->arch_size)
555 {
556 case 32:
557 ptralign = 2;
558 break;
559
560 case 64:
561 ptralign = 3;
562 break;
563
564 default:
565 bfd_set_error (bfd_error_bad_value);
566 return FALSE;
567 }
568
569 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
570 | SEC_LINKER_CREATED);
571
572 pltflags = flags;
573 pltflags |= SEC_CODE;
574 if (bed->plt_not_loaded)
575 pltflags &= ~ (SEC_LOAD | SEC_HAS_CONTENTS);
576 if (bed->plt_readonly)
577 pltflags |= SEC_READONLY;
578
579 s = bfd_make_section (abfd, ".plt");
580 if (s == NULL
581 || ! bfd_set_section_flags (abfd, s, pltflags)
582 || ! bfd_set_section_alignment (abfd, s, bed->plt_alignment))
583 return FALSE;
584
585 if (bed->want_plt_sym)
586 {
587 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
588 .plt section. */
589 bh = NULL;
590 if (! (_bfd_generic_link_add_one_symbol
591 (info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s,
592 (bfd_vma) 0, (const char *) NULL, FALSE,
593 get_elf_backend_data (abfd)->collect, &bh)))
594 return FALSE;
595 h = (struct elf_link_hash_entry *) bh;
596 h->def_regular = 1;
597 h->type = STT_OBJECT;
598
599 if (info->shared
600 && ! bfd_elf_link_record_dynamic_symbol (info, h))
601 return FALSE;
602 }
603
604 s = bfd_make_section (abfd, ".got");
605 if (s == NULL
606 || ! bfd_set_section_flags (abfd, s, flags)
607 || ! bfd_set_section_alignment (abfd, s, ptralign))
608 return FALSE;
609
610 if (bed->want_got_plt)
611 {
612 s = bfd_make_section (abfd, ".got.plt");
613 if (s == NULL
614 || ! bfd_set_section_flags (abfd, s, flags)
615 || ! bfd_set_section_alignment (abfd, s, ptralign))
616 return FALSE;
617 }
618
619 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
620 (or .got.plt) section. We don't do this in the linker script
621 because we don't want to define the symbol if we are not creating
622 a global offset table. */
623 bh = NULL;
624 if (!(_bfd_generic_link_add_one_symbol
625 (info, abfd, "_GLOBAL_OFFSET_TABLE_", BSF_GLOBAL, s,
626 bed->got_symbol_offset, (const char *) NULL, FALSE,
627 bed->collect, &bh)))
628 return FALSE;
629 h = (struct elf_link_hash_entry *) bh;
630 h->def_regular = 1;
631 h->type = STT_OBJECT;
632
633 if (info->shared
634 && ! bfd_elf_link_record_dynamic_symbol (info, h))
635 return FALSE;
636
637 elf_hash_table (info)->hgot = h;
638
639 /* The first bit of the global offset table is the header. */
640 s->size += bed->got_header_size + bed->got_symbol_offset;
641
642 return TRUE;
643 }
644
645 static reloc_howto_type *
646 bfd_elf32_bfd_reloc_type_lookup (abfd, code)
647 bfd *abfd ATTRIBUTE_UNUSED;
648 bfd_reloc_code_real_type code;
649 {
650 unsigned int i;
651
652 for (i = 0;
653 i < sizeof (mn10300_reloc_map) / sizeof (struct mn10300_reloc_map);
654 i++)
655 {
656 if (mn10300_reloc_map[i].bfd_reloc_val == code)
657 return &elf_mn10300_howto_table[mn10300_reloc_map[i].elf_reloc_val];
658 }
659
660 return NULL;
661 }
662
663 /* Set the howto pointer for an MN10300 ELF reloc. */
664
665 static void
666 mn10300_info_to_howto (abfd, cache_ptr, dst)
667 bfd *abfd ATTRIBUTE_UNUSED;
668 arelent *cache_ptr;
669 Elf_Internal_Rela *dst;
670 {
671 unsigned int r_type;
672
673 r_type = ELF32_R_TYPE (dst->r_info);
674 BFD_ASSERT (r_type < (unsigned int) R_MN10300_MAX);
675 cache_ptr->howto = &elf_mn10300_howto_table[r_type];
676 }
677
678 /* Look through the relocs for a section during the first phase.
679 Since we don't do .gots or .plts, we just need to consider the
680 virtual table relocs for gc. */
681
682 static bfd_boolean
683 mn10300_elf_check_relocs (abfd, info, sec, relocs)
684 bfd *abfd;
685 struct bfd_link_info *info;
686 asection *sec;
687 const Elf_Internal_Rela *relocs;
688 {
689 Elf_Internal_Shdr *symtab_hdr;
690 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
691 const Elf_Internal_Rela *rel;
692 const Elf_Internal_Rela *rel_end;
693 bfd * dynobj;
694 bfd_vma * local_got_offsets;
695 asection * sgot;
696 asection * srelgot;
697 asection * sreloc;
698
699 sgot = NULL;
700 srelgot = NULL;
701 sreloc = NULL;
702
703 if (info->relocatable)
704 return TRUE;
705
706 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
707 sym_hashes = elf_sym_hashes (abfd);
708 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym);
709 if (!elf_bad_symtab (abfd))
710 sym_hashes_end -= symtab_hdr->sh_info;
711
712 dynobj = elf_hash_table (info)->dynobj;
713 local_got_offsets = elf_local_got_offsets (abfd);
714 rel_end = relocs + sec->reloc_count;
715 for (rel = relocs; rel < rel_end; rel++)
716 {
717 struct elf_link_hash_entry *h;
718 unsigned long r_symndx;
719
720 r_symndx = ELF32_R_SYM (rel->r_info);
721 if (r_symndx < symtab_hdr->sh_info)
722 h = NULL;
723 else
724 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
725
726 /* Some relocs require a global offset table. */
727 if (dynobj == NULL)
728 {
729 switch (ELF32_R_TYPE (rel->r_info))
730 {
731 case R_MN10300_GOT32:
732 case R_MN10300_GOT24:
733 case R_MN10300_GOT16:
734 case R_MN10300_GOTOFF32:
735 case R_MN10300_GOTOFF24:
736 case R_MN10300_GOTOFF16:
737 case R_MN10300_GOTPC32:
738 case R_MN10300_GOTPC16:
739 elf_hash_table (info)->dynobj = dynobj = abfd;
740 if (! _bfd_mn10300_elf_create_got_section (dynobj, info))
741 return FALSE;
742 break;
743
744 default:
745 break;
746 }
747 }
748
749 switch (ELF32_R_TYPE (rel->r_info))
750 {
751 /* This relocation describes the C++ object vtable hierarchy.
752 Reconstruct it for later use during GC. */
753 case R_MN10300_GNU_VTINHERIT:
754 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
755 return FALSE;
756 break;
757
758 /* This relocation describes which C++ vtable entries are actually
759 used. Record for later use during GC. */
760 case R_MN10300_GNU_VTENTRY:
761 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
762 return FALSE;
763 break;
764 case R_MN10300_GOT32:
765 case R_MN10300_GOT24:
766 case R_MN10300_GOT16:
767 /* This symbol requires a global offset table entry. */
768
769 if (sgot == NULL)
770 {
771 sgot = bfd_get_section_by_name (dynobj, ".got");
772 BFD_ASSERT (sgot != NULL);
773 }
774
775 if (srelgot == NULL
776 && (h != NULL || info->shared))
777 {
778 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
779 if (srelgot == NULL)
780 {
781 srelgot = bfd_make_section (dynobj, ".rela.got");
782 if (srelgot == NULL
783 || ! bfd_set_section_flags (dynobj, srelgot,
784 (SEC_ALLOC
785 | SEC_LOAD
786 | SEC_HAS_CONTENTS
787 | SEC_IN_MEMORY
788 | SEC_LINKER_CREATED
789 | SEC_READONLY))
790 || ! bfd_set_section_alignment (dynobj, srelgot, 2))
791 return FALSE;
792 }
793 }
794
795 if (h != NULL)
796 {
797 if (h->got.offset != (bfd_vma) -1)
798 /* We have already allocated space in the .got. */
799 break;
800
801 h->got.offset = sgot->size;
802
803 /* Make sure this symbol is output as a dynamic symbol. */
804 if (h->dynindx == -1)
805 {
806 if (! bfd_elf_link_record_dynamic_symbol (info, h))
807 return FALSE;
808 }
809
810 srelgot->size += sizeof (Elf32_External_Rela);
811 }
812 else
813 {
814 /* This is a global offset table entry for a local
815 symbol. */
816 if (local_got_offsets == NULL)
817 {
818 size_t size;
819 unsigned int i;
820
821 size = symtab_hdr->sh_info * sizeof (bfd_vma);
822 local_got_offsets = (bfd_vma *) bfd_alloc (abfd, size);
823
824 if (local_got_offsets == NULL)
825 return FALSE;
826 elf_local_got_offsets (abfd) = local_got_offsets;
827
828 for (i = 0; i < symtab_hdr->sh_info; i++)
829 local_got_offsets[i] = (bfd_vma) -1;
830 }
831
832 if (local_got_offsets[r_symndx] != (bfd_vma) -1)
833 /* We have already allocated space in the .got. */
834 break;
835
836 local_got_offsets[r_symndx] = sgot->size;
837
838 if (info->shared)
839 /* If we are generating a shared object, we need to
840 output a R_MN10300_RELATIVE reloc so that the dynamic
841 linker can adjust this GOT entry. */
842 srelgot->size += sizeof (Elf32_External_Rela);
843 }
844
845 sgot->size += 4;
846
847 break;
848
849 case R_MN10300_PLT32:
850 case R_MN10300_PLT16:
851 /* This symbol requires a procedure linkage table entry. We
852 actually build the entry in adjust_dynamic_symbol,
853 because this might be a case of linking PIC code which is
854 never referenced by a dynamic object, in which case we
855 don't need to generate a procedure linkage table entry
856 after all. */
857
858 /* If this is a local symbol, we resolve it directly without
859 creating a procedure linkage table entry. */
860 if (h == NULL)
861 continue;
862
863 if (ELF_ST_VISIBILITY (h->other) == STV_INTERNAL
864 || ELF_ST_VISIBILITY (h->other) == STV_HIDDEN)
865 break;
866
867 h->needs_plt = 1;
868
869 break;
870
871 case R_MN10300_24:
872 case R_MN10300_16:
873 case R_MN10300_8:
874 case R_MN10300_PCREL32:
875 case R_MN10300_PCREL16:
876 case R_MN10300_PCREL8:
877 if (h != NULL)
878 h->non_got_ref = 1;
879 break;
880
881 case R_MN10300_32:
882 if (h != NULL)
883 h->non_got_ref = 1;
884
885 /* If we are creating a shared library, then we need to copy
886 the reloc into the shared library. */
887 if (info->shared
888 && (sec->flags & SEC_ALLOC) != 0)
889 {
890 /* When creating a shared object, we must copy these
891 reloc types into the output file. We create a reloc
892 section in dynobj and make room for this reloc. */
893 if (sreloc == NULL)
894 {
895 const char * name;
896
897 name = (bfd_elf_string_from_elf_section
898 (abfd,
899 elf_elfheader (abfd)->e_shstrndx,
900 elf_section_data (sec)->rel_hdr.sh_name));
901 if (name == NULL)
902 return FALSE;
903
904 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
905 && strcmp (bfd_get_section_name (abfd, sec),
906 name + 5) == 0);
907
908 sreloc = bfd_get_section_by_name (dynobj, name);
909 if (sreloc == NULL)
910 {
911 flagword flags;
912
913 sreloc = bfd_make_section (dynobj, name);
914 flags = (SEC_HAS_CONTENTS | SEC_READONLY
915 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
916 if ((sec->flags & SEC_ALLOC) != 0)
917 flags |= SEC_ALLOC | SEC_LOAD;
918 if (sreloc == NULL
919 || ! bfd_set_section_flags (dynobj, sreloc, flags)
920 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
921 return FALSE;
922 }
923 }
924
925 sreloc->size += sizeof (Elf32_External_Rela);
926 }
927
928 break;
929 }
930 }
931
932 return TRUE;
933 }
934
935 /* Return the section that should be marked against GC for a given
936 relocation. */
937
938 static asection *
939 mn10300_elf_gc_mark_hook (sec, info, rel, h, sym)
940 asection *sec;
941 struct bfd_link_info *info ATTRIBUTE_UNUSED;
942 Elf_Internal_Rela *rel;
943 struct elf_link_hash_entry *h;
944 Elf_Internal_Sym *sym;
945 {
946 if (h != NULL)
947 {
948 switch (ELF32_R_TYPE (rel->r_info))
949 {
950 case R_MN10300_GNU_VTINHERIT:
951 case R_MN10300_GNU_VTENTRY:
952 break;
953
954 default:
955 switch (h->root.type)
956 {
957 case bfd_link_hash_defined:
958 case bfd_link_hash_defweak:
959 return h->root.u.def.section;
960
961 case bfd_link_hash_common:
962 return h->root.u.c.p->section;
963
964 default:
965 break;
966 }
967 }
968 }
969 else
970 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
971
972 return NULL;
973 }
974
975 /* Perform a relocation as part of a final link. */
976 static bfd_reloc_status_type
977 mn10300_elf_final_link_relocate (howto, input_bfd, output_bfd,
978 input_section, contents, offset, value,
979 addend, h, symndx, info, sym_sec, is_local)
980 reloc_howto_type *howto;
981 bfd *input_bfd;
982 bfd *output_bfd ATTRIBUTE_UNUSED;
983 asection *input_section;
984 bfd_byte *contents;
985 bfd_vma offset;
986 bfd_vma value;
987 bfd_vma addend;
988 struct elf_link_hash_entry * h;
989 unsigned long symndx;
990 struct bfd_link_info *info;
991 asection *sym_sec ATTRIBUTE_UNUSED;
992 int is_local ATTRIBUTE_UNUSED;
993 {
994 unsigned long r_type = howto->type;
995 bfd_byte *hit_data = contents + offset;
996 bfd * dynobj;
997 bfd_vma * local_got_offsets;
998 asection * sgot;
999 asection * splt;
1000 asection * sreloc;
1001
1002 dynobj = elf_hash_table (info)->dynobj;
1003 local_got_offsets = elf_local_got_offsets (input_bfd);
1004
1005 sgot = NULL;
1006 splt = NULL;
1007 sreloc = NULL;
1008
1009 switch (r_type)
1010 {
1011 case R_MN10300_24:
1012 case R_MN10300_16:
1013 case R_MN10300_8:
1014 case R_MN10300_PCREL8:
1015 case R_MN10300_PCREL16:
1016 case R_MN10300_PCREL32:
1017 case R_MN10300_GOTOFF32:
1018 case R_MN10300_GOTOFF24:
1019 case R_MN10300_GOTOFF16:
1020 if (info->shared
1021 && (input_section->flags & SEC_ALLOC) != 0
1022 && h != NULL
1023 && ! SYMBOL_REFERENCES_LOCAL (info, h))
1024 return bfd_reloc_dangerous;
1025 }
1026
1027 switch (r_type)
1028 {
1029 case R_MN10300_NONE:
1030 return bfd_reloc_ok;
1031
1032 case R_MN10300_32:
1033 if (info->shared
1034 && (input_section->flags & SEC_ALLOC) != 0)
1035 {
1036 Elf_Internal_Rela outrel;
1037 bfd_boolean skip, relocate;
1038
1039 /* When generating a shared object, these relocations are
1040 copied into the output file to be resolved at run
1041 time. */
1042 if (sreloc == NULL)
1043 {
1044 const char * name;
1045
1046 name = (bfd_elf_string_from_elf_section
1047 (input_bfd,
1048 elf_elfheader (input_bfd)->e_shstrndx,
1049 elf_section_data (input_section)->rel_hdr.sh_name));
1050 if (name == NULL)
1051 return FALSE;
1052
1053 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
1054 && strcmp (bfd_get_section_name (input_bfd,
1055 input_section),
1056 name + 5) == 0);
1057
1058 sreloc = bfd_get_section_by_name (dynobj, name);
1059 BFD_ASSERT (sreloc != NULL);
1060 }
1061
1062 skip = FALSE;
1063
1064 outrel.r_offset = _bfd_elf_section_offset (input_bfd, info,
1065 input_section, offset);
1066 if (outrel.r_offset == (bfd_vma) -1)
1067 skip = TRUE;
1068
1069 outrel.r_offset += (input_section->output_section->vma
1070 + input_section->output_offset);
1071
1072 if (skip)
1073 {
1074 memset (&outrel, 0, sizeof outrel);
1075 relocate = FALSE;
1076 }
1077 else
1078 {
1079 /* h->dynindx may be -1 if this symbol was marked to
1080 become local. */
1081 if (h == NULL
1082 || SYMBOL_REFERENCES_LOCAL (info, h))
1083 {
1084 relocate = TRUE;
1085 outrel.r_info = ELF32_R_INFO (0, R_MN10300_RELATIVE);
1086 outrel.r_addend = value + addend;
1087 }
1088 else
1089 {
1090 BFD_ASSERT (h->dynindx != -1);
1091 relocate = FALSE;
1092 outrel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_32);
1093 outrel.r_addend = value + addend;
1094 }
1095 }
1096
1097 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
1098 (bfd_byte *) (((Elf32_External_Rela *) sreloc->contents)
1099 + sreloc->reloc_count));
1100 ++sreloc->reloc_count;
1101
1102 /* If this reloc is against an external symbol, we do
1103 not want to fiddle with the addend. Otherwise, we
1104 need to include the symbol value so that it becomes
1105 an addend for the dynamic reloc. */
1106 if (! relocate)
1107 return bfd_reloc_ok;
1108 }
1109 value += addend;
1110 bfd_put_32 (input_bfd, value, hit_data);
1111 return bfd_reloc_ok;
1112
1113 case R_MN10300_24:
1114 value += addend;
1115
1116 if ((long) value > 0x7fffff || (long) value < -0x800000)
1117 return bfd_reloc_overflow;
1118
1119 bfd_put_8 (input_bfd, value & 0xff, hit_data);
1120 bfd_put_8 (input_bfd, (value >> 8) & 0xff, hit_data + 1);
1121 bfd_put_8 (input_bfd, (value >> 16) & 0xff, hit_data + 2);
1122 return bfd_reloc_ok;
1123
1124 case R_MN10300_16:
1125 value += addend;
1126
1127 if ((long) value > 0x7fff || (long) value < -0x8000)
1128 return bfd_reloc_overflow;
1129
1130 bfd_put_16 (input_bfd, value, hit_data);
1131 return bfd_reloc_ok;
1132
1133 case R_MN10300_8:
1134 value += addend;
1135
1136 if ((long) value > 0x7f || (long) value < -0x80)
1137 return bfd_reloc_overflow;
1138
1139 bfd_put_8 (input_bfd, value, hit_data);
1140 return bfd_reloc_ok;
1141
1142 case R_MN10300_PCREL8:
1143 value -= (input_section->output_section->vma
1144 + input_section->output_offset);
1145 value -= offset;
1146 value += addend;
1147
1148 if ((long) value > 0xff || (long) value < -0x100)
1149 return bfd_reloc_overflow;
1150
1151 bfd_put_8 (input_bfd, value, hit_data);
1152 return bfd_reloc_ok;
1153
1154 case R_MN10300_PCREL16:
1155 value -= (input_section->output_section->vma
1156 + input_section->output_offset);
1157 value -= offset;
1158 value += addend;
1159
1160 if ((long) value > 0xffff || (long) value < -0x10000)
1161 return bfd_reloc_overflow;
1162
1163 bfd_put_16 (input_bfd, value, hit_data);
1164 return bfd_reloc_ok;
1165
1166 case R_MN10300_PCREL32:
1167 value -= (input_section->output_section->vma
1168 + input_section->output_offset);
1169 value -= offset;
1170 value += addend;
1171
1172 bfd_put_32 (input_bfd, value, hit_data);
1173 return bfd_reloc_ok;
1174
1175 case R_MN10300_GNU_VTINHERIT:
1176 case R_MN10300_GNU_VTENTRY:
1177 return bfd_reloc_ok;
1178
1179 case R_MN10300_GOTPC32:
1180 /* Use global offset table as symbol value. */
1181
1182 value = bfd_get_section_by_name (dynobj,
1183 ".got")->output_section->vma;
1184 value -= (input_section->output_section->vma
1185 + input_section->output_offset);
1186 value -= offset;
1187 value += addend;
1188
1189 bfd_put_32 (input_bfd, value, hit_data);
1190 return bfd_reloc_ok;
1191
1192 case R_MN10300_GOTPC16:
1193 /* Use global offset table as symbol value. */
1194
1195 value = bfd_get_section_by_name (dynobj,
1196 ".got")->output_section->vma;
1197 value -= (input_section->output_section->vma
1198 + input_section->output_offset);
1199 value -= offset;
1200 value += addend;
1201
1202 if ((long) value > 0xffff || (long) value < -0x10000)
1203 return bfd_reloc_overflow;
1204
1205 bfd_put_16 (input_bfd, value, hit_data);
1206 return bfd_reloc_ok;
1207
1208 case R_MN10300_GOTOFF32:
1209 value -= bfd_get_section_by_name (dynobj,
1210 ".got")->output_section->vma;
1211 value += addend;
1212
1213 bfd_put_32 (input_bfd, value, hit_data);
1214 return bfd_reloc_ok;
1215
1216 case R_MN10300_GOTOFF24:
1217 value -= bfd_get_section_by_name (dynobj,
1218 ".got")->output_section->vma;
1219 value += addend;
1220
1221 if ((long) value > 0x7fffff || (long) value < -0x800000)
1222 return bfd_reloc_overflow;
1223
1224 bfd_put_8 (input_bfd, value, hit_data);
1225 bfd_put_8 (input_bfd, (value >> 8) & 0xff, hit_data + 1);
1226 bfd_put_8 (input_bfd, (value >> 16) & 0xff, hit_data + 2);
1227 return bfd_reloc_ok;
1228
1229 case R_MN10300_GOTOFF16:
1230 value -= bfd_get_section_by_name (dynobj,
1231 ".got")->output_section->vma;
1232 value += addend;
1233
1234 if ((long) value > 0xffff || (long) value < -0x10000)
1235 return bfd_reloc_overflow;
1236
1237 bfd_put_16 (input_bfd, value, hit_data);
1238 return bfd_reloc_ok;
1239
1240 case R_MN10300_PLT32:
1241 if (h != NULL
1242 && ELF_ST_VISIBILITY (h->other) != STV_INTERNAL
1243 && ELF_ST_VISIBILITY (h->other) != STV_HIDDEN
1244 && h->plt.offset != (bfd_vma) -1)
1245 {
1246 asection * splt;
1247
1248 splt = bfd_get_section_by_name (dynobj, ".plt");
1249
1250 value = (splt->output_section->vma
1251 + splt->output_offset
1252 + h->plt.offset) - value;
1253 }
1254
1255 value -= (input_section->output_section->vma
1256 + input_section->output_offset);
1257 value -= offset;
1258 value += addend;
1259
1260 bfd_put_32 (input_bfd, value, hit_data);
1261 return bfd_reloc_ok;
1262
1263 case R_MN10300_PLT16:
1264 if (h != NULL
1265 && ELF_ST_VISIBILITY (h->other) != STV_INTERNAL
1266 && ELF_ST_VISIBILITY (h->other) != STV_HIDDEN
1267 && h->plt.offset != (bfd_vma) -1)
1268 {
1269 asection * splt;
1270
1271 splt = bfd_get_section_by_name (dynobj, ".plt");
1272
1273 value = (splt->output_section->vma
1274 + splt->output_offset
1275 + h->plt.offset) - value;
1276 }
1277
1278 value -= (input_section->output_section->vma
1279 + input_section->output_offset);
1280 value -= offset;
1281 value += addend;
1282
1283 if ((long) value > 0xffff || (long) value < -0x10000)
1284 return bfd_reloc_overflow;
1285
1286 bfd_put_16 (input_bfd, value, hit_data);
1287 return bfd_reloc_ok;
1288
1289 case R_MN10300_GOT32:
1290 case R_MN10300_GOT24:
1291 case R_MN10300_GOT16:
1292 {
1293 asection * sgot;
1294
1295 sgot = bfd_get_section_by_name (dynobj, ".got");
1296
1297 if (h != NULL)
1298 {
1299 bfd_vma off;
1300
1301 off = h->got.offset;
1302 BFD_ASSERT (off != (bfd_vma) -1);
1303
1304 if (! elf_hash_table (info)->dynamic_sections_created
1305 || SYMBOL_REFERENCES_LOCAL (info, h))
1306 /* This is actually a static link, or it is a
1307 -Bsymbolic link and the symbol is defined
1308 locally, or the symbol was forced to be local
1309 because of a version file. We must initialize
1310 this entry in the global offset table.
1311
1312 When doing a dynamic link, we create a .rela.got
1313 relocation entry to initialize the value. This
1314 is done in the finish_dynamic_symbol routine. */
1315 bfd_put_32 (output_bfd, value,
1316 sgot->contents + off);
1317
1318 value = sgot->output_offset + off;
1319 }
1320 else
1321 {
1322 bfd_vma off;
1323
1324 off = elf_local_got_offsets (input_bfd)[symndx];
1325
1326 bfd_put_32 (output_bfd, value, sgot->contents + off);
1327
1328 if (info->shared)
1329 {
1330 asection * srelgot;
1331 Elf_Internal_Rela outrel;
1332
1333 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1334 BFD_ASSERT (srelgot != NULL);
1335
1336 outrel.r_offset = (sgot->output_section->vma
1337 + sgot->output_offset
1338 + off);
1339 outrel.r_info = ELF32_R_INFO (0, R_MN10300_RELATIVE);
1340 outrel.r_addend = value;
1341 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
1342 (bfd_byte *) (((Elf32_External_Rela *)
1343 srelgot->contents)
1344 + srelgot->reloc_count));
1345 ++ srelgot->reloc_count;
1346 }
1347
1348 value = sgot->output_offset + off;
1349 }
1350 }
1351
1352 value += addend;
1353
1354 if (r_type == R_MN10300_GOT32)
1355 {
1356 bfd_put_32 (input_bfd, value, hit_data);
1357 return bfd_reloc_ok;
1358 }
1359 else if (r_type == R_MN10300_GOT24)
1360 {
1361 if ((long) value > 0x7fffff || (long) value < -0x800000)
1362 return bfd_reloc_overflow;
1363
1364 bfd_put_8 (input_bfd, value & 0xff, hit_data);
1365 bfd_put_8 (input_bfd, (value >> 8) & 0xff, hit_data + 1);
1366 bfd_put_8 (input_bfd, (value >> 16) & 0xff, hit_data + 2);
1367 return bfd_reloc_ok;
1368 }
1369 else if (r_type == R_MN10300_GOT16)
1370 {
1371 if ((long) value > 0xffff || (long) value < -0x10000)
1372 return bfd_reloc_overflow;
1373
1374 bfd_put_16 (input_bfd, value, hit_data);
1375 return bfd_reloc_ok;
1376 }
1377 /* Fall through. */
1378
1379 default:
1380 return bfd_reloc_notsupported;
1381 }
1382 }
1383 \f
1384 /* Relocate an MN10300 ELF section. */
1385 static bfd_boolean
1386 mn10300_elf_relocate_section (output_bfd, info, input_bfd, input_section,
1387 contents, relocs, local_syms, local_sections)
1388 bfd *output_bfd;
1389 struct bfd_link_info *info;
1390 bfd *input_bfd;
1391 asection *input_section;
1392 bfd_byte *contents;
1393 Elf_Internal_Rela *relocs;
1394 Elf_Internal_Sym *local_syms;
1395 asection **local_sections;
1396 {
1397 Elf_Internal_Shdr *symtab_hdr;
1398 struct elf_link_hash_entry **sym_hashes;
1399 Elf_Internal_Rela *rel, *relend;
1400
1401 if (info->relocatable)
1402 return TRUE;
1403
1404 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1405 sym_hashes = elf_sym_hashes (input_bfd);
1406
1407 rel = relocs;
1408 relend = relocs + input_section->reloc_count;
1409 for (; rel < relend; rel++)
1410 {
1411 int r_type;
1412 reloc_howto_type *howto;
1413 unsigned long r_symndx;
1414 Elf_Internal_Sym *sym;
1415 asection *sec;
1416 struct elf32_mn10300_link_hash_entry *h;
1417 bfd_vma relocation;
1418 bfd_reloc_status_type r;
1419
1420 r_symndx = ELF32_R_SYM (rel->r_info);
1421 r_type = ELF32_R_TYPE (rel->r_info);
1422 howto = elf_mn10300_howto_table + r_type;
1423
1424 /* Just skip the vtable gc relocs. */
1425 if (r_type == R_MN10300_GNU_VTINHERIT
1426 || r_type == R_MN10300_GNU_VTENTRY)
1427 continue;
1428
1429 h = NULL;
1430 sym = NULL;
1431 sec = NULL;
1432 if (r_symndx < symtab_hdr->sh_info)
1433 {
1434 sym = local_syms + r_symndx;
1435 sec = local_sections[r_symndx];
1436 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1437 }
1438 else
1439 {
1440 bfd_boolean unresolved_reloc;
1441 bfd_boolean warned;
1442 struct elf_link_hash_entry *hh;
1443
1444 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1445 r_symndx, symtab_hdr, sym_hashes,
1446 hh, sec, relocation,
1447 unresolved_reloc, warned);
1448
1449 h = (struct elf32_mn10300_link_hash_entry *) hh;
1450
1451 if ((h->root.root.type == bfd_link_hash_defined
1452 || h->root.root.type == bfd_link_hash_defweak)
1453 && ( r_type == R_MN10300_GOTPC32
1454 || r_type == R_MN10300_GOTPC16
1455 || (( r_type == R_MN10300_PLT32
1456 || r_type == R_MN10300_PLT16)
1457 && ELF_ST_VISIBILITY (h->root.other) != STV_INTERNAL
1458 && ELF_ST_VISIBILITY (h->root.other) != STV_HIDDEN
1459 && h->root.plt.offset != (bfd_vma) -1)
1460 || (( r_type == R_MN10300_GOT32
1461 || r_type == R_MN10300_GOT24
1462 || r_type == R_MN10300_GOT16)
1463 && elf_hash_table (info)->dynamic_sections_created
1464 && !SYMBOL_REFERENCES_LOCAL (info, hh))
1465 || (r_type == R_MN10300_32
1466 && !SYMBOL_REFERENCES_LOCAL (info, hh)
1467 && ((input_section->flags & SEC_ALLOC) != 0
1468 /* DWARF will emit R_MN10300_32 relocations
1469 in its sections against symbols defined
1470 externally in shared libraries. We can't
1471 do anything with them here. */
1472 || ((input_section->flags & SEC_DEBUGGING) != 0
1473 && h->root.def_dynamic)))))
1474 /* In these cases, we don't need the relocation
1475 value. We check specially because in some
1476 obscure cases sec->output_section will be NULL. */
1477 relocation = 0;
1478
1479 else if (unresolved_reloc)
1480 (*_bfd_error_handler)
1481 (_("%s: warning: unresolvable relocation against symbol `%s' from %s section"),
1482 bfd_get_filename (input_bfd), h->root.root.root.string,
1483 bfd_get_section_name (input_bfd, input_section));
1484 }
1485
1486 r = mn10300_elf_final_link_relocate (howto, input_bfd, output_bfd,
1487 input_section,
1488 contents, rel->r_offset,
1489 relocation, rel->r_addend,
1490 (struct elf_link_hash_entry *)h,
1491 r_symndx,
1492 info, sec, h == NULL);
1493
1494 if (r != bfd_reloc_ok)
1495 {
1496 const char *name;
1497 const char *msg = (const char *) 0;
1498
1499 if (h != NULL)
1500 name = h->root.root.root.string;
1501 else
1502 {
1503 name = (bfd_elf_string_from_elf_section
1504 (input_bfd, symtab_hdr->sh_link, sym->st_name));
1505 if (name == NULL || *name == '\0')
1506 name = bfd_section_name (input_bfd, sec);
1507 }
1508
1509 switch (r)
1510 {
1511 case bfd_reloc_overflow:
1512 if (! ((*info->callbacks->reloc_overflow)
1513 (info, (h ? &h->root.root : NULL), name,
1514 howto->name, (bfd_vma) 0, input_bfd,
1515 input_section, rel->r_offset)))
1516 return FALSE;
1517 break;
1518
1519 case bfd_reloc_undefined:
1520 if (! ((*info->callbacks->undefined_symbol)
1521 (info, name, input_bfd, input_section,
1522 rel->r_offset, TRUE)))
1523 return FALSE;
1524 break;
1525
1526 case bfd_reloc_outofrange:
1527 msg = _("internal error: out of range error");
1528 goto common_error;
1529
1530 case bfd_reloc_notsupported:
1531 msg = _("internal error: unsupported relocation error");
1532 goto common_error;
1533
1534 case bfd_reloc_dangerous:
1535 msg = _("internal error: dangerous error");
1536 goto common_error;
1537
1538 default:
1539 msg = _("internal error: unknown error");
1540 /* fall through */
1541
1542 common_error:
1543 if (!((*info->callbacks->warning)
1544 (info, msg, name, input_bfd, input_section,
1545 rel->r_offset)))
1546 return FALSE;
1547 break;
1548 }
1549 }
1550 }
1551
1552 return TRUE;
1553 }
1554
1555 /* Finish initializing one hash table entry. */
1556 static bfd_boolean
1557 elf32_mn10300_finish_hash_table_entry (gen_entry, in_args)
1558 struct bfd_hash_entry *gen_entry;
1559 PTR in_args;
1560 {
1561 struct elf32_mn10300_link_hash_entry *entry;
1562 struct bfd_link_info *link_info = (struct bfd_link_info *)in_args;
1563 unsigned int byte_count = 0;
1564
1565 entry = (struct elf32_mn10300_link_hash_entry *) gen_entry;
1566
1567 if (entry->root.root.type == bfd_link_hash_warning)
1568 entry = (struct elf32_mn10300_link_hash_entry *) entry->root.root.u.i.link;
1569
1570 /* If we already know we want to convert "call" to "calls" for calls
1571 to this symbol, then return now. */
1572 if (entry->flags == MN10300_CONVERT_CALL_TO_CALLS)
1573 return TRUE;
1574
1575 /* If there are no named calls to this symbol, or there's nothing we
1576 can move from the function itself into the "call" instruction,
1577 then note that all "call" instructions should be converted into
1578 "calls" instructions and return. If a symbol is available for
1579 dynamic symbol resolution (overridable or overriding), avoid
1580 custom calling conventions. */
1581 if (entry->direct_calls == 0
1582 || (entry->stack_size == 0 && entry->movm_args == 0)
1583 || (elf_hash_table (link_info)->dynamic_sections_created
1584 && ELF_ST_VISIBILITY (entry->root.other) != STV_INTERNAL
1585 && ELF_ST_VISIBILITY (entry->root.other) != STV_HIDDEN))
1586 {
1587 /* Make a note that we should convert "call" instructions to "calls"
1588 instructions for calls to this symbol. */
1589 entry->flags |= MN10300_CONVERT_CALL_TO_CALLS;
1590 return TRUE;
1591 }
1592
1593 /* We may be able to move some instructions from the function itself into
1594 the "call" instruction. Count how many bytes we might be able to
1595 eliminate in the function itself. */
1596
1597 /* A movm instruction is two bytes. */
1598 if (entry->movm_args)
1599 byte_count += 2;
1600
1601 /* Count the insn to allocate stack space too. */
1602 if (entry->stack_size > 0)
1603 {
1604 if (entry->stack_size <= 128)
1605 byte_count += 3;
1606 else
1607 byte_count += 4;
1608 }
1609
1610 /* If using "call" will result in larger code, then turn all
1611 the associated "call" instructions into "calls" instructions. */
1612 if (byte_count < entry->direct_calls)
1613 entry->flags |= MN10300_CONVERT_CALL_TO_CALLS;
1614
1615 /* This routine never fails. */
1616 return TRUE;
1617 }
1618
1619 /* This function handles relaxing for the mn10300.
1620
1621 There are quite a few relaxing opportunities available on the mn10300:
1622
1623 * calls:32 -> calls:16 2 bytes
1624 * call:32 -> call:16 2 bytes
1625
1626 * call:32 -> calls:32 1 byte
1627 * call:16 -> calls:16 1 byte
1628 * These are done anytime using "calls" would result
1629 in smaller code, or when necessary to preserve the
1630 meaning of the program.
1631
1632 * call:32 varies
1633 * call:16
1634 * In some circumstances we can move instructions
1635 from a function prologue into a "call" instruction.
1636 This is only done if the resulting code is no larger
1637 than the original code.
1638
1639 * jmp:32 -> jmp:16 2 bytes
1640 * jmp:16 -> bra:8 1 byte
1641
1642 * If the previous instruction is a conditional branch
1643 around the jump/bra, we may be able to reverse its condition
1644 and change its target to the jump's target. The jump/bra
1645 can then be deleted. 2 bytes
1646
1647 * mov abs32 -> mov abs16 1 or 2 bytes
1648
1649 * Most instructions which accept imm32 can relax to imm16 1 or 2 bytes
1650 - Most instructions which accept imm16 can relax to imm8 1 or 2 bytes
1651
1652 * Most instructions which accept d32 can relax to d16 1 or 2 bytes
1653 - Most instructions which accept d16 can relax to d8 1 or 2 bytes
1654
1655 We don't handle imm16->imm8 or d16->d8 as they're very rare
1656 and somewhat more difficult to support. */
1657
1658 static bfd_boolean
1659 mn10300_elf_relax_section (abfd, sec, link_info, again)
1660 bfd *abfd;
1661 asection *sec;
1662 struct bfd_link_info *link_info;
1663 bfd_boolean *again;
1664 {
1665 Elf_Internal_Shdr *symtab_hdr;
1666 Elf_Internal_Rela *internal_relocs = NULL;
1667 Elf_Internal_Rela *irel, *irelend;
1668 bfd_byte *contents = NULL;
1669 Elf_Internal_Sym *isymbuf = NULL;
1670 struct elf32_mn10300_link_hash_table *hash_table;
1671 asection *section = sec;
1672
1673 /* Assume nothing changes. */
1674 *again = FALSE;
1675
1676 /* We need a pointer to the mn10300 specific hash table. */
1677 hash_table = elf32_mn10300_hash_table (link_info);
1678
1679 /* Initialize fields in each hash table entry the first time through. */
1680 if ((hash_table->flags & MN10300_HASH_ENTRIES_INITIALIZED) == 0)
1681 {
1682 bfd *input_bfd;
1683
1684 /* Iterate over all the input bfds. */
1685 for (input_bfd = link_info->input_bfds;
1686 input_bfd != NULL;
1687 input_bfd = input_bfd->link_next)
1688 {
1689 /* We're going to need all the symbols for each bfd. */
1690 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1691 if (symtab_hdr->sh_info != 0)
1692 {
1693 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1694 if (isymbuf == NULL)
1695 isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
1696 symtab_hdr->sh_info, 0,
1697 NULL, NULL, NULL);
1698 if (isymbuf == NULL)
1699 goto error_return;
1700 }
1701
1702 /* Iterate over each section in this bfd. */
1703 for (section = input_bfd->sections;
1704 section != NULL;
1705 section = section->next)
1706 {
1707 struct elf32_mn10300_link_hash_entry *hash;
1708 Elf_Internal_Sym *sym;
1709 asection *sym_sec = NULL;
1710 const char *sym_name;
1711 char *new_name;
1712
1713 /* If there's nothing to do in this section, skip it. */
1714 if (! (((section->flags & SEC_RELOC) != 0
1715 && section->reloc_count != 0)
1716 || (section->flags & SEC_CODE) != 0))
1717 continue;
1718
1719 /* Get cached copy of section contents if it exists. */
1720 if (elf_section_data (section)->this_hdr.contents != NULL)
1721 contents = elf_section_data (section)->this_hdr.contents;
1722 else if (section->size != 0)
1723 {
1724 /* Go get them off disk. */
1725 if (!bfd_malloc_and_get_section (input_bfd, section,
1726 &contents))
1727 goto error_return;
1728 }
1729 else
1730 contents = NULL;
1731
1732 /* If there aren't any relocs, then there's nothing to do. */
1733 if ((section->flags & SEC_RELOC) != 0
1734 && section->reloc_count != 0)
1735 {
1736
1737 /* Get a copy of the native relocations. */
1738 internal_relocs = (_bfd_elf_link_read_relocs
1739 (input_bfd, section, (PTR) NULL,
1740 (Elf_Internal_Rela *) NULL,
1741 link_info->keep_memory));
1742 if (internal_relocs == NULL)
1743 goto error_return;
1744
1745 /* Now examine each relocation. */
1746 irel = internal_relocs;
1747 irelend = irel + section->reloc_count;
1748 for (; irel < irelend; irel++)
1749 {
1750 long r_type;
1751 unsigned long r_index;
1752 unsigned char code;
1753
1754 r_type = ELF32_R_TYPE (irel->r_info);
1755 r_index = ELF32_R_SYM (irel->r_info);
1756
1757 if (r_type < 0 || r_type >= (int) R_MN10300_MAX)
1758 goto error_return;
1759
1760 /* We need the name and hash table entry of the target
1761 symbol! */
1762 hash = NULL;
1763 sym = NULL;
1764 sym_sec = NULL;
1765
1766 if (r_index < symtab_hdr->sh_info)
1767 {
1768 /* A local symbol. */
1769 Elf_Internal_Sym *isym;
1770 struct elf_link_hash_table *elftab;
1771 bfd_size_type amt;
1772
1773 isym = isymbuf + r_index;
1774 if (isym->st_shndx == SHN_UNDEF)
1775 sym_sec = bfd_und_section_ptr;
1776 else if (isym->st_shndx == SHN_ABS)
1777 sym_sec = bfd_abs_section_ptr;
1778 else if (isym->st_shndx == SHN_COMMON)
1779 sym_sec = bfd_com_section_ptr;
1780 else
1781 sym_sec
1782 = bfd_section_from_elf_index (input_bfd,
1783 isym->st_shndx);
1784
1785 sym_name
1786 = bfd_elf_string_from_elf_section (input_bfd,
1787 (symtab_hdr
1788 ->sh_link),
1789 isym->st_name);
1790
1791 /* If it isn't a function, then we don't care
1792 about it. */
1793 if (ELF_ST_TYPE (isym->st_info) != STT_FUNC)
1794 continue;
1795
1796 /* Tack on an ID so we can uniquely identify this
1797 local symbol in the global hash table. */
1798 amt = strlen (sym_name) + 10;
1799 new_name = bfd_malloc (amt);
1800 if (new_name == 0)
1801 goto error_return;
1802
1803 sprintf (new_name, "%s_%08x",
1804 sym_name, (int) sym_sec);
1805 sym_name = new_name;
1806
1807 elftab = &hash_table->static_hash_table->root;
1808 hash = ((struct elf32_mn10300_link_hash_entry *)
1809 elf_link_hash_lookup (elftab, sym_name,
1810 TRUE, TRUE, FALSE));
1811 free (new_name);
1812 }
1813 else
1814 {
1815 r_index -= symtab_hdr->sh_info;
1816 hash = (struct elf32_mn10300_link_hash_entry *)
1817 elf_sym_hashes (input_bfd)[r_index];
1818 }
1819
1820 /* If this is not a "call" instruction, then we
1821 should convert "call" instructions to "calls"
1822 instructions. */
1823 code = bfd_get_8 (input_bfd,
1824 contents + irel->r_offset - 1);
1825 if (code != 0xdd && code != 0xcd)
1826 hash->flags |= MN10300_CONVERT_CALL_TO_CALLS;
1827
1828 /* If this is a jump/call, then bump the
1829 direct_calls counter. Else force "call" to
1830 "calls" conversions. */
1831 if (r_type == R_MN10300_PCREL32
1832 || r_type == R_MN10300_PLT32
1833 || r_type == R_MN10300_PLT16
1834 || r_type == R_MN10300_PCREL16)
1835 hash->direct_calls++;
1836 else
1837 hash->flags |= MN10300_CONVERT_CALL_TO_CALLS;
1838 }
1839 }
1840
1841 /* Now look at the actual contents to get the stack size,
1842 and a list of what registers were saved in the prologue
1843 (ie movm_args). */
1844 if ((section->flags & SEC_CODE) != 0)
1845 {
1846 Elf_Internal_Sym *isym, *isymend;
1847 unsigned int sec_shndx;
1848 struct elf_link_hash_entry **hashes;
1849 struct elf_link_hash_entry **end_hashes;
1850 unsigned int symcount;
1851
1852 sec_shndx = _bfd_elf_section_from_bfd_section (input_bfd,
1853 section);
1854
1855 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
1856 - symtab_hdr->sh_info);
1857 hashes = elf_sym_hashes (input_bfd);
1858 end_hashes = hashes + symcount;
1859
1860 /* Look at each function defined in this section and
1861 update info for that function. */
1862 isymend = isymbuf + symtab_hdr->sh_info;
1863 for (isym = isymbuf; isym < isymend; isym++)
1864 {
1865 if (isym->st_shndx == sec_shndx
1866 && ELF_ST_TYPE (isym->st_info) == STT_FUNC)
1867 {
1868 struct elf_link_hash_table *elftab;
1869 bfd_size_type amt;
1870 struct elf_link_hash_entry **lhashes = hashes;
1871
1872 /* Skip a local symbol if it aliases a
1873 global one. */
1874 for (; lhashes < end_hashes; lhashes++)
1875 {
1876 hash = (struct elf32_mn10300_link_hash_entry *) *lhashes;
1877 if ((hash->root.root.type == bfd_link_hash_defined
1878 || hash->root.root.type == bfd_link_hash_defweak)
1879 && hash->root.root.u.def.section == section
1880 && hash->root.type == STT_FUNC
1881 && hash->root.root.u.def.value == isym->st_value)
1882 break;
1883 }
1884 if (lhashes != end_hashes)
1885 continue;
1886
1887 if (isym->st_shndx == SHN_UNDEF)
1888 sym_sec = bfd_und_section_ptr;
1889 else if (isym->st_shndx == SHN_ABS)
1890 sym_sec = bfd_abs_section_ptr;
1891 else if (isym->st_shndx == SHN_COMMON)
1892 sym_sec = bfd_com_section_ptr;
1893 else
1894 sym_sec
1895 = bfd_section_from_elf_index (input_bfd,
1896 isym->st_shndx);
1897
1898 sym_name = (bfd_elf_string_from_elf_section
1899 (input_bfd, symtab_hdr->sh_link,
1900 isym->st_name));
1901
1902 /* Tack on an ID so we can uniquely identify this
1903 local symbol in the global hash table. */
1904 amt = strlen (sym_name) + 10;
1905 new_name = bfd_malloc (amt);
1906 if (new_name == 0)
1907 goto error_return;
1908
1909 sprintf (new_name, "%s_%08x",
1910 sym_name, (int) sym_sec);
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, (int) sym_sec);
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, (int) sym_sec);
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 (abfd,
3931 bed->default_use_rela_p ? ".rela.plt" : ".rel.plt");
3932 if (s == NULL
3933 || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
3934 || ! bfd_set_section_alignment (abfd, s, ptralign))
3935 return FALSE;
3936
3937 if (! _bfd_mn10300_elf_create_got_section (abfd, info))
3938 return FALSE;
3939
3940 {
3941 const char * secname;
3942 char * relname;
3943 flagword secflags;
3944 asection * sec;
3945
3946 for (sec = abfd->sections; sec; sec = sec->next)
3947 {
3948 secflags = bfd_get_section_flags (abfd, sec);
3949 if ((secflags & (SEC_DATA | SEC_LINKER_CREATED))
3950 || ((secflags & SEC_HAS_CONTENTS) != SEC_HAS_CONTENTS))
3951 continue;
3952
3953 secname = bfd_get_section_name (abfd, sec);
3954 relname = (char *) bfd_malloc (strlen (secname) + 6);
3955 strcpy (relname, ".rela");
3956 strcat (relname, secname);
3957
3958 s = bfd_make_section (abfd, relname);
3959 if (s == NULL
3960 || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
3961 || ! bfd_set_section_alignment (abfd, s, ptralign))
3962 return FALSE;
3963 }
3964 }
3965
3966 if (bed->want_dynbss)
3967 {
3968 /* The .dynbss section is a place to put symbols which are defined
3969 by dynamic objects, are referenced by regular objects, and are
3970 not functions. We must allocate space for them in the process
3971 image and use a R_*_COPY reloc to tell the dynamic linker to
3972 initialize them at run time. The linker script puts the .dynbss
3973 section into the .bss section of the final image. */
3974 s = bfd_make_section (abfd, ".dynbss");
3975 if (s == NULL
3976 || ! bfd_set_section_flags (abfd, s, SEC_ALLOC))
3977 return FALSE;
3978
3979 /* The .rel[a].bss section holds copy relocs. This section is not
3980 normally needed. We need to create it here, though, so that the
3981 linker will map it to an output section. We can't just create it
3982 only if we need it, because we will not know whether we need it
3983 until we have seen all the input files, and the first time the
3984 main linker code calls BFD after examining all the input files
3985 (size_dynamic_sections) the input sections have already been
3986 mapped to the output sections. If the section turns out not to
3987 be needed, we can discard it later. We will never need this
3988 section when generating a shared object, since they do not use
3989 copy relocs. */
3990 if (! info->shared)
3991 {
3992 s = bfd_make_section (abfd,
3993 (bed->default_use_rela_p
3994 ? ".rela.bss" : ".rel.bss"));
3995 if (s == NULL
3996 || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
3997 || ! bfd_set_section_alignment (abfd, s, ptralign))
3998 return FALSE;
3999 }
4000 }
4001
4002 return TRUE;
4003 }
4004 \f
4005 /* Adjust a symbol defined by a dynamic object and referenced by a
4006 regular object. The current definition is in some section of the
4007 dynamic object, but we're not including those sections. We have to
4008 change the definition to something the rest of the link can
4009 understand. */
4010
4011 static bfd_boolean
4012 _bfd_mn10300_elf_adjust_dynamic_symbol (info, h)
4013 struct bfd_link_info * info;
4014 struct elf_link_hash_entry * h;
4015 {
4016 bfd * dynobj;
4017 asection * s;
4018 unsigned int power_of_two;
4019
4020 dynobj = elf_hash_table (info)->dynobj;
4021
4022 /* Make sure we know what is going on here. */
4023 BFD_ASSERT (dynobj != NULL
4024 && (h->needs_plt
4025 || h->u.weakdef != NULL
4026 || (h->def_dynamic
4027 && h->ref_regular
4028 && !h->def_regular)));
4029
4030 /* If this is a function, put it in the procedure linkage table. We
4031 will fill in the contents of the procedure linkage table later,
4032 when we know the address of the .got section. */
4033 if (h->type == STT_FUNC
4034 || h->needs_plt)
4035 {
4036 if (! info->shared
4037 && !h->def_dynamic
4038 && !h->ref_dynamic)
4039 {
4040 /* This case can occur if we saw a PLT reloc in an input
4041 file, but the symbol was never referred to by a dynamic
4042 object. In such a case, we don't actually need to build
4043 a procedure linkage table, and we can just do a REL32
4044 reloc instead. */
4045 BFD_ASSERT (h->needs_plt);
4046 return TRUE;
4047 }
4048
4049 /* Make sure this symbol is output as a dynamic symbol. */
4050 if (h->dynindx == -1)
4051 {
4052 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4053 return FALSE;
4054 }
4055
4056 s = bfd_get_section_by_name (dynobj, ".plt");
4057 BFD_ASSERT (s != NULL);
4058
4059 /* If this is the first .plt entry, make room for the special
4060 first entry. */
4061 if (s->size == 0)
4062 s->size += elf_mn10300_sizeof_plt0 (info);
4063
4064 /* If this symbol is not defined in a regular file, and we are
4065 not generating a shared library, then set the symbol to this
4066 location in the .plt. This is required to make function
4067 pointers compare as equal between the normal executable and
4068 the shared library. */
4069 if (! info->shared
4070 && !h->def_regular)
4071 {
4072 h->root.u.def.section = s;
4073 h->root.u.def.value = s->size;
4074 }
4075
4076 h->plt.offset = s->size;
4077
4078 /* Make room for this entry. */
4079 s->size += elf_mn10300_sizeof_plt (info);
4080
4081 /* We also need to make an entry in the .got.plt section, which
4082 will be placed in the .got section by the linker script. */
4083
4084 s = bfd_get_section_by_name (dynobj, ".got.plt");
4085 BFD_ASSERT (s != NULL);
4086 s->size += 4;
4087
4088 /* We also need to make an entry in the .rela.plt section. */
4089
4090 s = bfd_get_section_by_name (dynobj, ".rela.plt");
4091 BFD_ASSERT (s != NULL);
4092 s->size += sizeof (Elf32_External_Rela);
4093
4094 return TRUE;
4095 }
4096
4097 /* If this is a weak symbol, and there is a real definition, the
4098 processor independent code will have arranged for us to see the
4099 real definition first, and we can just use the same value. */
4100 if (h->u.weakdef != NULL)
4101 {
4102 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4103 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4104 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4105 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4106 return TRUE;
4107 }
4108
4109 /* This is a reference to a symbol defined by a dynamic object which
4110 is not a function. */
4111
4112 /* If we are creating a shared library, we must presume that the
4113 only references to the symbol are via the global offset table.
4114 For such cases we need not do anything here; the relocations will
4115 be handled correctly by relocate_section. */
4116 if (info->shared)
4117 return TRUE;
4118
4119 /* If there are no references to this symbol that do not use the
4120 GOT, we don't need to generate a copy reloc. */
4121 if (!h->non_got_ref)
4122 return TRUE;
4123
4124 /* We must allocate the symbol in our .dynbss section, which will
4125 become part of the .bss section of the executable. There will be
4126 an entry for this symbol in the .dynsym section. The dynamic
4127 object will contain position independent code, so all references
4128 from the dynamic object to this symbol will go through the global
4129 offset table. The dynamic linker will use the .dynsym entry to
4130 determine the address it must put in the global offset table, so
4131 both the dynamic object and the regular object will refer to the
4132 same memory location for the variable. */
4133
4134 s = bfd_get_section_by_name (dynobj, ".dynbss");
4135 BFD_ASSERT (s != NULL);
4136
4137 /* We must generate a R_MN10300_COPY reloc to tell the dynamic linker to
4138 copy the initial value out of the dynamic object and into the
4139 runtime process image. We need to remember the offset into the
4140 .rela.bss section we are going to use. */
4141 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4142 {
4143 asection * srel;
4144
4145 srel = bfd_get_section_by_name (dynobj, ".rela.bss");
4146 BFD_ASSERT (srel != NULL);
4147 srel->size += sizeof (Elf32_External_Rela);
4148 h->needs_copy = 1;
4149 }
4150
4151 /* We need to figure out the alignment required for this symbol. I
4152 have no idea how ELF linkers handle this. */
4153 power_of_two = bfd_log2 (h->size);
4154 if (power_of_two > 3)
4155 power_of_two = 3;
4156
4157 /* Apply the required alignment. */
4158 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
4159 if (power_of_two > bfd_get_section_alignment (dynobj, s))
4160 {
4161 if (! bfd_set_section_alignment (dynobj, s, power_of_two))
4162 return FALSE;
4163 }
4164
4165 /* Define the symbol as being at this point in the section. */
4166 h->root.u.def.section = s;
4167 h->root.u.def.value = s->size;
4168
4169 /* Increment the section size to make room for the symbol. */
4170 s->size += h->size;
4171
4172 return TRUE;
4173 }
4174
4175 /* Set the sizes of the dynamic sections. */
4176
4177 static bfd_boolean
4178 _bfd_mn10300_elf_size_dynamic_sections (output_bfd, info)
4179 bfd * output_bfd;
4180 struct bfd_link_info * info;
4181 {
4182 bfd * dynobj;
4183 asection * s;
4184 bfd_boolean plt;
4185 bfd_boolean relocs;
4186 bfd_boolean reltext;
4187
4188 dynobj = elf_hash_table (info)->dynobj;
4189 BFD_ASSERT (dynobj != NULL);
4190
4191 if (elf_hash_table (info)->dynamic_sections_created)
4192 {
4193 /* Set the contents of the .interp section to the interpreter. */
4194 if (info->executable)
4195 {
4196 s = bfd_get_section_by_name (dynobj, ".interp");
4197 BFD_ASSERT (s != NULL);
4198 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4199 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
4200 }
4201 }
4202 else
4203 {
4204 /* We may have created entries in the .rela.got section.
4205 However, if we are not creating the dynamic sections, we will
4206 not actually use these entries. Reset the size of .rela.got,
4207 which will cause it to get stripped from the output file
4208 below. */
4209 s = bfd_get_section_by_name (dynobj, ".rela.got");
4210 if (s != NULL)
4211 s->size = 0;
4212 }
4213
4214 /* The check_relocs and adjust_dynamic_symbol entry points have
4215 determined the sizes of the various dynamic sections. Allocate
4216 memory for them. */
4217 plt = FALSE;
4218 relocs = FALSE;
4219 reltext = FALSE;
4220 for (s = dynobj->sections; s != NULL; s = s->next)
4221 {
4222 const char * name;
4223 bfd_boolean strip;
4224
4225 if ((s->flags & SEC_LINKER_CREATED) == 0)
4226 continue;
4227
4228 /* It's OK to base decisions on the section name, because none
4229 of the dynobj section names depend upon the input files. */
4230 name = bfd_get_section_name (dynobj, s);
4231
4232 strip = FALSE;
4233
4234 if (strcmp (name, ".plt") == 0)
4235 {
4236 if (s->size == 0)
4237 /* Strip this section if we don't need it; see the
4238 comment below. */
4239 strip = TRUE;
4240 else
4241 /* Remember whether there is a PLT. */
4242 plt = TRUE;
4243 }
4244 else if (strncmp (name, ".rela", 5) == 0)
4245 {
4246 if (s->size == 0)
4247 {
4248 /* If we don't need this section, strip it from the
4249 output file. This is mostly to handle .rela.bss and
4250 .rela.plt. We must create both sections in
4251 create_dynamic_sections, because they must be created
4252 before the linker maps input sections to output
4253 sections. The linker does that before
4254 adjust_dynamic_symbol is called, and it is that
4255 function which decides whether anything needs to go
4256 into these sections. */
4257 strip = TRUE;
4258 }
4259 else
4260 {
4261 asection * target;
4262
4263 /* Remember whether there are any reloc sections other
4264 than .rela.plt. */
4265 if (strcmp (name, ".rela.plt") != 0)
4266 {
4267 const char * outname;
4268
4269 relocs = TRUE;
4270
4271 /* If this relocation section applies to a read only
4272 section, then we probably need a DT_TEXTREL
4273 entry. The entries in the .rela.plt section
4274 really apply to the .got section, which we
4275 created ourselves and so know is not readonly. */
4276 outname = bfd_get_section_name (output_bfd,
4277 s->output_section);
4278 target = bfd_get_section_by_name (output_bfd, outname + 5);
4279 if (target != NULL
4280 && (target->flags & SEC_READONLY) != 0
4281 && (target->flags & SEC_ALLOC) != 0)
4282 reltext = TRUE;
4283 }
4284
4285 /* We use the reloc_count field as a counter if we need
4286 to copy relocs into the output file. */
4287 s->reloc_count = 0;
4288 }
4289 }
4290 else if (strncmp (name, ".got", 4) != 0)
4291 /* It's not one of our sections, so don't allocate space. */
4292 continue;
4293
4294 if (strip)
4295 {
4296 _bfd_strip_section_from_output (info, s);
4297 continue;
4298 }
4299
4300 /* Allocate memory for the section contents. We use bfd_zalloc
4301 here in case unused entries are not reclaimed before the
4302 section's contents are written out. This should not happen,
4303 but this way if it does, we get a R_MN10300_NONE reloc
4304 instead of garbage. */
4305 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
4306 if (s->contents == NULL && s->size != 0)
4307 return FALSE;
4308 }
4309
4310 if (elf_hash_table (info)->dynamic_sections_created)
4311 {
4312 /* Add some entries to the .dynamic section. We fill in the
4313 values later, in _bfd_mn10300_elf_finish_dynamic_sections,
4314 but we must add the entries now so that we get the correct
4315 size for the .dynamic section. The DT_DEBUG entry is filled
4316 in by the dynamic linker and used by the debugger. */
4317 if (! info->shared)
4318 {
4319 if (!_bfd_elf_add_dynamic_entry (info, DT_DEBUG, 0))
4320 return FALSE;
4321 }
4322
4323 if (plt)
4324 {
4325 if (!_bfd_elf_add_dynamic_entry (info, DT_PLTGOT, 0)
4326 || !_bfd_elf_add_dynamic_entry (info, DT_PLTRELSZ, 0)
4327 || !_bfd_elf_add_dynamic_entry (info, DT_PLTREL, DT_RELA)
4328 || !_bfd_elf_add_dynamic_entry (info, DT_JMPREL, 0))
4329 return FALSE;
4330 }
4331
4332 if (relocs)
4333 {
4334 if (!_bfd_elf_add_dynamic_entry (info, DT_RELA, 0)
4335 || !_bfd_elf_add_dynamic_entry (info, DT_RELASZ, 0)
4336 || !_bfd_elf_add_dynamic_entry (info, DT_RELAENT,
4337 sizeof (Elf32_External_Rela)))
4338 return FALSE;
4339 }
4340
4341 if (reltext)
4342 {
4343 if (!_bfd_elf_add_dynamic_entry (info, DT_TEXTREL, 0))
4344 return FALSE;
4345 }
4346 }
4347
4348 return TRUE;
4349 }
4350
4351 /* Finish up dynamic symbol handling. We set the contents of various
4352 dynamic sections here. */
4353
4354 static bfd_boolean
4355 _bfd_mn10300_elf_finish_dynamic_symbol (output_bfd, info, h, sym)
4356 bfd * output_bfd;
4357 struct bfd_link_info * info;
4358 struct elf_link_hash_entry * h;
4359 Elf_Internal_Sym * sym;
4360 {
4361 bfd * dynobj;
4362
4363 dynobj = elf_hash_table (info)->dynobj;
4364
4365 if (h->plt.offset != (bfd_vma) -1)
4366 {
4367 asection * splt;
4368 asection * sgot;
4369 asection * srel;
4370 bfd_vma plt_index;
4371 bfd_vma got_offset;
4372 Elf_Internal_Rela rel;
4373
4374 /* This symbol has an entry in the procedure linkage table. Set
4375 it up. */
4376
4377 BFD_ASSERT (h->dynindx != -1);
4378
4379 splt = bfd_get_section_by_name (dynobj, ".plt");
4380 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
4381 srel = bfd_get_section_by_name (dynobj, ".rela.plt");
4382 BFD_ASSERT (splt != NULL && sgot != NULL && srel != NULL);
4383
4384 /* Get the index in the procedure linkage table which
4385 corresponds to this symbol. This is the index of this symbol
4386 in all the symbols for which we are making plt entries. The
4387 first entry in the procedure linkage table is reserved. */
4388 plt_index = ((h->plt.offset - elf_mn10300_sizeof_plt0 (info))
4389 / elf_mn10300_sizeof_plt (info));
4390
4391 /* Get the offset into the .got table of the entry that
4392 corresponds to this function. Each .got entry is 4 bytes.
4393 The first three are reserved. */
4394 got_offset = (plt_index + 3) * 4;
4395
4396 /* Fill in the entry in the procedure linkage table. */
4397 if (! info->shared)
4398 {
4399 memcpy (splt->contents + h->plt.offset, elf_mn10300_plt_entry,
4400 elf_mn10300_sizeof_plt (info));
4401 bfd_put_32 (output_bfd,
4402 (sgot->output_section->vma
4403 + sgot->output_offset
4404 + got_offset),
4405 (splt->contents + h->plt.offset
4406 + elf_mn10300_plt_symbol_offset (info)));
4407
4408 bfd_put_32 (output_bfd,
4409 (1 - h->plt.offset - elf_mn10300_plt_plt0_offset (info)),
4410 (splt->contents + h->plt.offset
4411 + elf_mn10300_plt_plt0_offset (info)));
4412 }
4413 else
4414 {
4415 memcpy (splt->contents + h->plt.offset, elf_mn10300_pic_plt_entry,
4416 elf_mn10300_sizeof_plt (info));
4417
4418 bfd_put_32 (output_bfd, got_offset,
4419 (splt->contents + h->plt.offset
4420 + elf_mn10300_plt_symbol_offset (info)));
4421 }
4422
4423 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
4424 (splt->contents + h->plt.offset
4425 + elf_mn10300_plt_reloc_offset (info)));
4426
4427 /* Fill in the entry in the global offset table. */
4428 bfd_put_32 (output_bfd,
4429 (splt->output_section->vma
4430 + splt->output_offset
4431 + h->plt.offset
4432 + elf_mn10300_plt_temp_offset (info)),
4433 sgot->contents + got_offset);
4434
4435 /* Fill in the entry in the .rela.plt section. */
4436 rel.r_offset = (sgot->output_section->vma
4437 + sgot->output_offset
4438 + got_offset);
4439 rel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_JMP_SLOT);
4440 rel.r_addend = 0;
4441 bfd_elf32_swap_reloca_out (output_bfd, &rel,
4442 (bfd_byte *) ((Elf32_External_Rela *) srel->contents
4443 + plt_index));
4444
4445 if (!h->def_regular)
4446 /* Mark the symbol as undefined, rather than as defined in
4447 the .plt section. Leave the value alone. */
4448 sym->st_shndx = SHN_UNDEF;
4449 }
4450
4451 if (h->got.offset != (bfd_vma) -1)
4452 {
4453 asection * sgot;
4454 asection * srel;
4455 Elf_Internal_Rela rel;
4456
4457 /* This symbol has an entry in the global offset table. Set it up. */
4458
4459 sgot = bfd_get_section_by_name (dynobj, ".got");
4460 srel = bfd_get_section_by_name (dynobj, ".rela.got");
4461 BFD_ASSERT (sgot != NULL && srel != NULL);
4462
4463 rel.r_offset = (sgot->output_section->vma
4464 + sgot->output_offset
4465 + (h->got.offset &~ 1));
4466
4467 /* If this is a -Bsymbolic link, and the symbol is defined
4468 locally, we just want to emit a RELATIVE reloc. Likewise if
4469 the symbol was forced to be local because of a version file.
4470 The entry in the global offset table will already have been
4471 initialized in the relocate_section function. */
4472 if (info->shared
4473 && (info->symbolic || h->dynindx == -1)
4474 && h->def_regular)
4475 {
4476 rel.r_info = ELF32_R_INFO (0, R_MN10300_RELATIVE);
4477 rel.r_addend = (h->root.u.def.value
4478 + h->root.u.def.section->output_section->vma
4479 + h->root.u.def.section->output_offset);
4480 }
4481 else
4482 {
4483 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
4484 rel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_GLOB_DAT);
4485 rel.r_addend = 0;
4486 }
4487
4488 bfd_elf32_swap_reloca_out (output_bfd, &rel,
4489 (bfd_byte *) ((Elf32_External_Rela *) srel->contents
4490 + srel->reloc_count));
4491 ++ srel->reloc_count;
4492 }
4493
4494 if (h->needs_copy)
4495 {
4496 asection * s;
4497 Elf_Internal_Rela rel;
4498
4499 /* This symbol needs a copy reloc. Set it up. */
4500 BFD_ASSERT (h->dynindx != -1
4501 && (h->root.type == bfd_link_hash_defined
4502 || h->root.type == bfd_link_hash_defweak));
4503
4504 s = bfd_get_section_by_name (h->root.u.def.section->owner,
4505 ".rela.bss");
4506 BFD_ASSERT (s != NULL);
4507
4508 rel.r_offset = (h->root.u.def.value
4509 + h->root.u.def.section->output_section->vma
4510 + h->root.u.def.section->output_offset);
4511 rel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_COPY);
4512 rel.r_addend = 0;
4513 bfd_elf32_swap_reloca_out (output_bfd, &rel,
4514 (bfd_byte *) ((Elf32_External_Rela *) s->contents
4515 + s->reloc_count));
4516 ++ s->reloc_count;
4517 }
4518
4519 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
4520 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
4521 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
4522 sym->st_shndx = SHN_ABS;
4523
4524 return TRUE;
4525 }
4526
4527 /* Finish up the dynamic sections. */
4528
4529 static bfd_boolean
4530 _bfd_mn10300_elf_finish_dynamic_sections (output_bfd, info)
4531 bfd * output_bfd;
4532 struct bfd_link_info * info;
4533 {
4534 bfd * dynobj;
4535 asection * sgot;
4536 asection * sdyn;
4537
4538 dynobj = elf_hash_table (info)->dynobj;
4539
4540 sgot = bfd_get_section_by_name (dynobj, ".got.plt");
4541 BFD_ASSERT (sgot != NULL);
4542 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
4543
4544 if (elf_hash_table (info)->dynamic_sections_created)
4545 {
4546 asection * splt;
4547 Elf32_External_Dyn * dyncon;
4548 Elf32_External_Dyn * dynconend;
4549
4550 BFD_ASSERT (sdyn != NULL);
4551
4552 dyncon = (Elf32_External_Dyn *) sdyn->contents;
4553 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
4554
4555 for (; dyncon < dynconend; dyncon++)
4556 {
4557 Elf_Internal_Dyn dyn;
4558 const char * name;
4559 asection * s;
4560
4561 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4562
4563 switch (dyn.d_tag)
4564 {
4565 default:
4566 break;
4567
4568 case DT_PLTGOT:
4569 name = ".got";
4570 goto get_vma;
4571
4572 case DT_JMPREL:
4573 name = ".rela.plt";
4574 get_vma:
4575 s = bfd_get_section_by_name (output_bfd, name);
4576 BFD_ASSERT (s != NULL);
4577 dyn.d_un.d_ptr = s->vma;
4578 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4579 break;
4580
4581 case DT_PLTRELSZ:
4582 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
4583 BFD_ASSERT (s != NULL);
4584 dyn.d_un.d_val = s->size;
4585 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4586 break;
4587
4588 case DT_RELASZ:
4589 /* My reading of the SVR4 ABI indicates that the
4590 procedure linkage table relocs (DT_JMPREL) should be
4591 included in the overall relocs (DT_RELA). This is
4592 what Solaris does. However, UnixWare can not handle
4593 that case. Therefore, we override the DT_RELASZ entry
4594 here to make it not include the JMPREL relocs. Since
4595 the linker script arranges for .rela.plt to follow all
4596 other relocation sections, we don't have to worry
4597 about changing the DT_RELA entry. */
4598 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
4599 if (s != NULL)
4600 dyn.d_un.d_val -= s->size;
4601 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4602 break;
4603 }
4604 }
4605
4606 /* Fill in the first entry in the procedure linkage table. */
4607 splt = bfd_get_section_by_name (dynobj, ".plt");
4608 if (splt && splt->size > 0)
4609 {
4610 if (info->shared)
4611 {
4612 memcpy (splt->contents, elf_mn10300_pic_plt_entry,
4613 elf_mn10300_sizeof_plt (info));
4614 }
4615 else
4616 {
4617 memcpy (splt->contents, elf_mn10300_plt0_entry, PLT0_ENTRY_SIZE);
4618 bfd_put_32 (output_bfd,
4619 sgot->output_section->vma + sgot->output_offset + 4,
4620 splt->contents + elf_mn10300_plt0_gotid_offset (info));
4621 bfd_put_32 (output_bfd,
4622 sgot->output_section->vma + sgot->output_offset + 8,
4623 splt->contents + elf_mn10300_plt0_linker_offset (info));
4624 }
4625
4626 /* UnixWare sets the entsize of .plt to 4, although that doesn't
4627 really seem like the right value. */
4628 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
4629 }
4630 }
4631
4632 /* Fill in the first three entries in the global offset table. */
4633 if (sgot->size > 0)
4634 {
4635 if (sdyn == NULL)
4636 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
4637 else
4638 bfd_put_32 (output_bfd,
4639 sdyn->output_section->vma + sdyn->output_offset,
4640 sgot->contents);
4641 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
4642 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
4643 }
4644
4645 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
4646
4647 return TRUE;
4648 }
4649
4650 /* Classify relocation types, such that combreloc can sort them
4651 properly. */
4652
4653 static enum elf_reloc_type_class
4654 _bfd_mn10300_elf_reloc_type_class (const Elf_Internal_Rela *rela)
4655 {
4656 switch ((int) ELF32_R_TYPE (rela->r_info))
4657 {
4658 case R_MN10300_RELATIVE:
4659 return reloc_class_relative;
4660 case R_MN10300_JMP_SLOT:
4661 return reloc_class_plt;
4662 case R_MN10300_COPY:
4663 return reloc_class_copy;
4664 default:
4665 return reloc_class_normal;
4666 }
4667 }
4668
4669 #ifndef ELF_ARCH
4670 #define TARGET_LITTLE_SYM bfd_elf32_mn10300_vec
4671 #define TARGET_LITTLE_NAME "elf32-mn10300"
4672 #define ELF_ARCH bfd_arch_mn10300
4673 #define ELF_MACHINE_CODE EM_MN10300
4674 #define ELF_MACHINE_ALT1 EM_CYGNUS_MN10300
4675 #define ELF_MAXPAGESIZE 0x1000
4676 #endif
4677
4678 #define elf_info_to_howto mn10300_info_to_howto
4679 #define elf_info_to_howto_rel 0
4680 #define elf_backend_can_gc_sections 1
4681 #define elf_backend_rela_normal 1
4682 #define elf_backend_check_relocs mn10300_elf_check_relocs
4683 #define elf_backend_gc_mark_hook mn10300_elf_gc_mark_hook
4684 #define elf_backend_relocate_section mn10300_elf_relocate_section
4685 #define bfd_elf32_bfd_relax_section mn10300_elf_relax_section
4686 #define bfd_elf32_bfd_get_relocated_section_contents \
4687 mn10300_elf_get_relocated_section_contents
4688 #define bfd_elf32_bfd_link_hash_table_create \
4689 elf32_mn10300_link_hash_table_create
4690 #define bfd_elf32_bfd_link_hash_table_free \
4691 elf32_mn10300_link_hash_table_free
4692
4693 #ifndef elf_symbol_leading_char
4694 #define elf_symbol_leading_char '_'
4695 #endif
4696
4697 /* So we can set bits in e_flags. */
4698 #define elf_backend_final_write_processing \
4699 _bfd_mn10300_elf_final_write_processing
4700 #define elf_backend_object_p _bfd_mn10300_elf_object_p
4701
4702 #define bfd_elf32_bfd_merge_private_bfd_data \
4703 _bfd_mn10300_elf_merge_private_bfd_data
4704
4705 #define elf_backend_can_gc_sections 1
4706 #define elf_backend_create_dynamic_sections \
4707 _bfd_mn10300_elf_create_dynamic_sections
4708 #define elf_backend_adjust_dynamic_symbol \
4709 _bfd_mn10300_elf_adjust_dynamic_symbol
4710 #define elf_backend_size_dynamic_sections \
4711 _bfd_mn10300_elf_size_dynamic_sections
4712 #define elf_backend_finish_dynamic_symbol \
4713 _bfd_mn10300_elf_finish_dynamic_symbol
4714 #define elf_backend_finish_dynamic_sections \
4715 _bfd_mn10300_elf_finish_dynamic_sections
4716
4717 #define elf_backend_reloc_type_class \
4718 _bfd_mn10300_elf_reloc_type_class
4719
4720 #define elf_backend_want_got_plt 1
4721 #define elf_backend_plt_readonly 1
4722 #define elf_backend_want_plt_sym 0
4723 #define elf_backend_got_header_size 12
4724
4725 #include "elf32-target.h"
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