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[binutils-gdb.git] / bfd / elf32-cr16.c
1 /* BFD back-end for National Semiconductor's CR16 ELF
2 Copyright (C) 2007-2022 Free Software Foundation, Inc.
3 Written by M R Swami Reddy.
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 3 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 Foundation,
19 Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
20
21 #include "sysdep.h"
22 #include "bfd.h"
23 #include "bfdlink.h"
24 #include "libbfd.h"
25 #include "libiberty.h"
26 #include "elf-bfd.h"
27 #include "elf/cr16.h"
28 #include "elf32-cr16.h"
29
30 /* The cr16 linker needs to keep track of the number of relocs that
31 it decides to copy in check_relocs for each symbol. This is so
32 that it can discard PC relative relocs if it doesn't need them when
33 linking with -Bsymbolic. We store the information in a field
34 extending the regular ELF linker hash table. */
35
36 struct elf32_cr16_link_hash_entry
37 {
38 /* The basic elf link hash table entry. */
39 struct elf_link_hash_entry root;
40
41 /* For function symbols, the number of times this function is
42 called directly (ie by name). */
43 unsigned int direct_calls;
44
45 /* For function symbols, the size of this function's stack
46 (if <= 255 bytes). We stuff this into "call" instructions
47 to this target when it's valid and profitable to do so.
48
49 This does not include stack allocated by movm! */
50 unsigned char stack_size;
51
52 /* For function symbols, arguments (if any) for movm instruction
53 in the prologue. We stuff this value into "call" instructions
54 to the target when it's valid and profitable to do so. */
55 unsigned char movm_args;
56
57 /* For function symbols, the amount of stack space that would be allocated
58 by the movm instruction. This is redundant with movm_args, but we
59 add it to the hash table to avoid computing it over and over. */
60 unsigned char movm_stack_size;
61
62 /* Used to mark functions which have had redundant parts of their
63 prologue deleted. */
64 #define CR16_DELETED_PROLOGUE_BYTES 0x1
65 unsigned char flags;
66
67 /* Calculated value. */
68 bfd_vma value;
69 };
70
71 /* cr16_reloc_map array maps BFD relocation enum into a CRGAS relocation type. */
72
73 struct cr16_reloc_map
74 {
75 bfd_reloc_code_real_type bfd_reloc_enum; /* BFD relocation enum. */
76 unsigned short cr16_reloc_type; /* CR16 relocation type. */
77 };
78
79 static const struct cr16_reloc_map cr16_reloc_map[R_CR16_MAX] =
80 {
81 {BFD_RELOC_NONE, R_CR16_NONE},
82 {BFD_RELOC_CR16_NUM8, R_CR16_NUM8},
83 {BFD_RELOC_CR16_NUM16, R_CR16_NUM16},
84 {BFD_RELOC_CR16_NUM32, R_CR16_NUM32},
85 {BFD_RELOC_CR16_NUM32a, R_CR16_NUM32a},
86 {BFD_RELOC_CR16_REGREL4, R_CR16_REGREL4},
87 {BFD_RELOC_CR16_REGREL4a, R_CR16_REGREL4a},
88 {BFD_RELOC_CR16_REGREL14, R_CR16_REGREL14},
89 {BFD_RELOC_CR16_REGREL14a, R_CR16_REGREL14a},
90 {BFD_RELOC_CR16_REGREL16, R_CR16_REGREL16},
91 {BFD_RELOC_CR16_REGREL20, R_CR16_REGREL20},
92 {BFD_RELOC_CR16_REGREL20a, R_CR16_REGREL20a},
93 {BFD_RELOC_CR16_ABS20, R_CR16_ABS20},
94 {BFD_RELOC_CR16_ABS24, R_CR16_ABS24},
95 {BFD_RELOC_CR16_IMM4, R_CR16_IMM4},
96 {BFD_RELOC_CR16_IMM8, R_CR16_IMM8},
97 {BFD_RELOC_CR16_IMM16, R_CR16_IMM16},
98 {BFD_RELOC_CR16_IMM20, R_CR16_IMM20},
99 {BFD_RELOC_CR16_IMM24, R_CR16_IMM24},
100 {BFD_RELOC_CR16_IMM32, R_CR16_IMM32},
101 {BFD_RELOC_CR16_IMM32a, R_CR16_IMM32a},
102 {BFD_RELOC_CR16_DISP4, R_CR16_DISP4},
103 {BFD_RELOC_CR16_DISP8, R_CR16_DISP8},
104 {BFD_RELOC_CR16_DISP16, R_CR16_DISP16},
105 {BFD_RELOC_CR16_DISP24, R_CR16_DISP24},
106 {BFD_RELOC_CR16_DISP24a, R_CR16_DISP24a},
107 {BFD_RELOC_CR16_SWITCH8, R_CR16_SWITCH8},
108 {BFD_RELOC_CR16_SWITCH16, R_CR16_SWITCH16},
109 {BFD_RELOC_CR16_SWITCH32, R_CR16_SWITCH32},
110 {BFD_RELOC_CR16_GOT_REGREL20, R_CR16_GOT_REGREL20},
111 {BFD_RELOC_CR16_GOTC_REGREL20, R_CR16_GOTC_REGREL20},
112 {BFD_RELOC_CR16_GLOB_DAT, R_CR16_GLOB_DAT}
113 };
114
115 static reloc_howto_type cr16_elf_howto_table[] =
116 {
117 HOWTO (R_CR16_NONE, /* type */
118 0, /* rightshift */
119 0, /* size */
120 0, /* bitsize */
121 false, /* pc_relative */
122 0, /* bitpos */
123 complain_overflow_dont, /* complain_on_overflow */
124 bfd_elf_generic_reloc, /* special_function */
125 "R_CR16_NONE", /* name */
126 false, /* partial_inplace */
127 0, /* src_mask */
128 0, /* dst_mask */
129 false), /* pcrel_offset */
130
131 HOWTO (R_CR16_NUM8, /* type */
132 0, /* rightshift */
133 1, /* size */
134 8, /* bitsize */
135 false, /* pc_relative */
136 0, /* bitpos */
137 complain_overflow_bitfield,/* complain_on_overflow */
138 bfd_elf_generic_reloc, /* special_function */
139 "R_CR16_NUM8", /* name */
140 false, /* partial_inplace */
141 0x0, /* src_mask */
142 0xff, /* dst_mask */
143 false), /* pcrel_offset */
144
145 HOWTO (R_CR16_NUM16, /* type */
146 0, /* rightshift */
147 2, /* size */
148 16, /* bitsize */
149 false, /* pc_relative */
150 0, /* bitpos */
151 complain_overflow_bitfield,/* complain_on_overflow */
152 bfd_elf_generic_reloc, /* special_function */
153 "R_CR16_NUM16", /* name */
154 false, /* partial_inplace */
155 0x0, /* src_mask */
156 0xffff, /* dst_mask */
157 false), /* pcrel_offset */
158
159 HOWTO (R_CR16_NUM32, /* type */
160 0, /* rightshift */
161 4, /* size */
162 32, /* bitsize */
163 false, /* pc_relative */
164 0, /* bitpos */
165 complain_overflow_bitfield,/* complain_on_overflow */
166 bfd_elf_generic_reloc, /* special_function */
167 "R_CR16_NUM32", /* name */
168 false, /* partial_inplace */
169 0x0, /* src_mask */
170 0xffffffff, /* dst_mask */
171 false), /* pcrel_offset */
172
173 HOWTO (R_CR16_NUM32a, /* type */
174 1, /* rightshift */
175 4, /* size */
176 32, /* bitsize */
177 false, /* pc_relative */
178 0, /* bitpos */
179 complain_overflow_bitfield,/* complain_on_overflow */
180 bfd_elf_generic_reloc, /* special_function */
181 "R_CR16_NUM32a", /* name */
182 false, /* partial_inplace */
183 0x0, /* src_mask */
184 0xffffffff, /* dst_mask */
185 false), /* pcrel_offset */
186
187 HOWTO (R_CR16_REGREL4, /* type */
188 0, /* rightshift */
189 1, /* size */
190 4, /* bitsize */
191 false, /* pc_relative */
192 0, /* bitpos */
193 complain_overflow_bitfield,/* complain_on_overflow */
194 bfd_elf_generic_reloc, /* special_function */
195 "R_CR16_REGREL4", /* name */
196 false, /* partial_inplace */
197 0x0, /* src_mask */
198 0xf, /* dst_mask */
199 false), /* pcrel_offset */
200
201 HOWTO (R_CR16_REGREL4a, /* type */
202 0, /* rightshift */
203 1, /* size */
204 4, /* bitsize */
205 false, /* pc_relative */
206 0, /* bitpos */
207 complain_overflow_bitfield,/* complain_on_overflow */
208 bfd_elf_generic_reloc, /* special_function */
209 "R_CR16_REGREL4a", /* name */
210 false, /* partial_inplace */
211 0x0, /* src_mask */
212 0xf, /* dst_mask */
213 false), /* pcrel_offset */
214
215 HOWTO (R_CR16_REGREL14, /* type */
216 0, /* rightshift */
217 2, /* size */
218 14, /* bitsize */
219 false, /* pc_relative */
220 0, /* bitpos */
221 complain_overflow_bitfield,/* complain_on_overflow */
222 bfd_elf_generic_reloc, /* special_function */
223 "R_CR16_REGREL14", /* name */
224 false, /* partial_inplace */
225 0x0, /* src_mask */
226 0x3fff, /* dst_mask */
227 false), /* pcrel_offset */
228
229 HOWTO (R_CR16_REGREL14a, /* type */
230 0, /* rightshift */
231 2, /* size */
232 14, /* bitsize */
233 false, /* pc_relative */
234 0, /* bitpos */
235 complain_overflow_bitfield,/* complain_on_overflow */
236 bfd_elf_generic_reloc, /* special_function */
237 "R_CR16_REGREL14a", /* name */
238 false, /* partial_inplace */
239 0x0, /* src_mask */
240 0x3fff, /* dst_mask */
241 false), /* pcrel_offset */
242
243 HOWTO (R_CR16_REGREL16, /* type */
244 0, /* rightshift */
245 2, /* size */
246 16, /* bitsize */
247 false, /* pc_relative */
248 0, /* bitpos */
249 complain_overflow_bitfield,/* complain_on_overflow */
250 bfd_elf_generic_reloc, /* special_function */
251 "R_CR16_REGREL16", /* name */
252 false, /* partial_inplace */
253 0x0, /* src_mask */
254 0xffff, /* dst_mask */
255 false), /* pcrel_offset */
256
257 HOWTO (R_CR16_REGREL20, /* type */
258 0, /* rightshift */
259 4, /* size */
260 20, /* bitsize */
261 false, /* pc_relative */
262 0, /* bitpos */
263 complain_overflow_bitfield,/* complain_on_overflow */
264 bfd_elf_generic_reloc, /* special_function */
265 "R_CR16_REGREL20", /* name */
266 false, /* partial_inplace */
267 0x0, /* src_mask */
268 0xfffff, /* dst_mask */
269 false), /* pcrel_offset */
270
271 HOWTO (R_CR16_REGREL20a, /* type */
272 0, /* rightshift */
273 4, /* size */
274 20, /* bitsize */
275 false, /* pc_relative */
276 0, /* bitpos */
277 complain_overflow_bitfield,/* complain_on_overflow */
278 bfd_elf_generic_reloc, /* special_function */
279 "R_CR16_REGREL20a", /* name */
280 false, /* partial_inplace */
281 0x0, /* src_mask */
282 0xfffff, /* dst_mask */
283 false), /* pcrel_offset */
284
285 HOWTO (R_CR16_ABS20, /* type */
286 0, /* rightshift */
287 4, /* size */
288 20, /* bitsize */
289 false, /* pc_relative */
290 0, /* bitpos */
291 complain_overflow_bitfield,/* complain_on_overflow */
292 bfd_elf_generic_reloc, /* special_function */
293 "R_CR16_ABS20", /* name */
294 false, /* partial_inplace */
295 0x0, /* src_mask */
296 0xfffff, /* dst_mask */
297 false), /* pcrel_offset */
298
299 HOWTO (R_CR16_ABS24, /* type */
300 0, /* rightshift */
301 4, /* size */
302 24, /* bitsize */
303 false, /* pc_relative */
304 0, /* bitpos */
305 complain_overflow_bitfield,/* complain_on_overflow */
306 bfd_elf_generic_reloc, /* special_function */
307 "R_CR16_ABS24", /* name */
308 false, /* partial_inplace */
309 0x0, /* src_mask */
310 0xffffff, /* dst_mask */
311 false), /* pcrel_offset */
312
313 HOWTO (R_CR16_IMM4, /* type */
314 0, /* rightshift */
315 1, /* size */
316 4, /* bitsize */
317 false, /* pc_relative */
318 0, /* bitpos */
319 complain_overflow_bitfield,/* complain_on_overflow */
320 bfd_elf_generic_reloc, /* special_function */
321 "R_CR16_IMM4", /* name */
322 false, /* partial_inplace */
323 0x0, /* src_mask */
324 0xf, /* dst_mask */
325 false), /* pcrel_offset */
326
327 HOWTO (R_CR16_IMM8, /* type */
328 0, /* rightshift */
329 1, /* size */
330 8, /* bitsize */
331 false, /* pc_relative */
332 0, /* bitpos */
333 complain_overflow_bitfield,/* complain_on_overflow */
334 bfd_elf_generic_reloc, /* special_function */
335 "R_CR16_IMM8", /* name */
336 false, /* partial_inplace */
337 0x0, /* src_mask */
338 0xff, /* dst_mask */
339 false), /* pcrel_offset */
340
341 HOWTO (R_CR16_IMM16, /* type */
342 0, /* rightshift */
343 2, /* size */
344 16, /* bitsize */
345 false, /* pc_relative */
346 0, /* bitpos */
347 complain_overflow_bitfield,/* complain_on_overflow */
348 bfd_elf_generic_reloc, /* special_function */
349 "R_CR16_IMM16", /* name */
350 false, /* partial_inplace */
351 0x0, /* src_mask */
352 0xffff, /* dst_mask */
353 false), /* pcrel_offset */
354
355 HOWTO (R_CR16_IMM20, /* type */
356 0, /* rightshift */
357 4, /* size */
358 20, /* bitsize */
359 false, /* pc_relative */
360 0, /* bitpos */
361 complain_overflow_bitfield,/* complain_on_overflow */
362 bfd_elf_generic_reloc, /* special_function */
363 "R_CR16_IMM20", /* name */
364 false, /* partial_inplace */
365 0x0, /* src_mask */
366 0xfffff, /* dst_mask */
367 false), /* pcrel_offset */
368
369 HOWTO (R_CR16_IMM24, /* type */
370 0, /* rightshift */
371 4, /* size */
372 24, /* bitsize */
373 false, /* pc_relative */
374 0, /* bitpos */
375 complain_overflow_bitfield,/* complain_on_overflow */
376 bfd_elf_generic_reloc, /* special_function */
377 "R_CR16_IMM24", /* name */
378 false, /* partial_inplace */
379 0x0, /* src_mask */
380 0xffffff, /* dst_mask */
381 false), /* pcrel_offset */
382
383 HOWTO (R_CR16_IMM32, /* type */
384 0, /* rightshift */
385 4, /* size */
386 32, /* bitsize */
387 false, /* pc_relative */
388 0, /* bitpos */
389 complain_overflow_bitfield,/* complain_on_overflow */
390 bfd_elf_generic_reloc, /* special_function */
391 "R_CR16_IMM32", /* name */
392 false, /* partial_inplace */
393 0x0, /* src_mask */
394 0xffffffff, /* dst_mask */
395 false), /* pcrel_offset */
396
397 HOWTO (R_CR16_IMM32a, /* type */
398 1, /* rightshift */
399 4, /* size */
400 32, /* bitsize */
401 false, /* pc_relative */
402 0, /* bitpos */
403 complain_overflow_bitfield,/* complain_on_overflow */
404 bfd_elf_generic_reloc, /* special_function */
405 "R_CR16_IMM32a", /* name */
406 false, /* partial_inplace */
407 0x0, /* src_mask */
408 0xffffffff, /* dst_mask */
409 false), /* pcrel_offset */
410
411 HOWTO (R_CR16_DISP4, /* type */
412 1, /* rightshift */
413 1, /* size */
414 4, /* bitsize */
415 true, /* pc_relative */
416 0, /* bitpos */
417 complain_overflow_unsigned, /* complain_on_overflow */
418 bfd_elf_generic_reloc, /* special_function */
419 "R_CR16_DISP4", /* name */
420 false, /* partial_inplace */
421 0x0, /* src_mask */
422 0xf, /* dst_mask */
423 false), /* pcrel_offset */
424
425 HOWTO (R_CR16_DISP8, /* type */
426 1, /* rightshift */
427 1, /* size */
428 8, /* bitsize */
429 true, /* pc_relative */
430 0, /* bitpos */
431 complain_overflow_unsigned, /* complain_on_overflow */
432 bfd_elf_generic_reloc, /* special_function */
433 "R_CR16_DISP8", /* name */
434 false, /* partial_inplace */
435 0x0, /* src_mask */
436 0x1ff, /* dst_mask */
437 false), /* pcrel_offset */
438
439 HOWTO (R_CR16_DISP16, /* type */
440 0, /* rightshift REVIITS: To sync with WinIDEA*/
441 2, /* size */
442 16, /* bitsize */
443 true, /* pc_relative */
444 0, /* bitpos */
445 complain_overflow_unsigned, /* complain_on_overflow */
446 bfd_elf_generic_reloc, /* special_function */
447 "R_CR16_DISP16", /* name */
448 false, /* partial_inplace */
449 0x0, /* src_mask */
450 0x1ffff, /* dst_mask */
451 false), /* pcrel_offset */
452 /* REVISIT: DISP24 should be left-shift by 2 as per ISA doc
453 but its not done, to sync with WinIDEA and CR16 4.1 tools */
454 HOWTO (R_CR16_DISP24, /* type */
455 0, /* rightshift */
456 4, /* size */
457 24, /* bitsize */
458 true, /* pc_relative */
459 0, /* bitpos */
460 complain_overflow_unsigned, /* complain_on_overflow */
461 bfd_elf_generic_reloc, /* special_function */
462 "R_CR16_DISP24", /* name */
463 false, /* partial_inplace */
464 0x0, /* src_mask */
465 0x1ffffff, /* dst_mask */
466 false), /* pcrel_offset */
467
468 HOWTO (R_CR16_DISP24a, /* type */
469 0, /* rightshift */
470 4, /* size */
471 24, /* bitsize */
472 true, /* pc_relative */
473 0, /* bitpos */
474 complain_overflow_unsigned, /* complain_on_overflow */
475 bfd_elf_generic_reloc, /* special_function */
476 "R_CR16_DISP24a", /* name */
477 false, /* partial_inplace */
478 0x0, /* src_mask */
479 0xffffff, /* dst_mask */
480 false), /* pcrel_offset */
481
482 /* An 8 bit switch table entry. This is generated for an expression
483 such as ``.byte L1 - L2''. The offset holds the difference
484 between the reloc address and L2. */
485 HOWTO (R_CR16_SWITCH8, /* type */
486 0, /* rightshift */
487 1, /* size */
488 8, /* bitsize */
489 false, /* pc_relative */
490 0, /* bitpos */
491 complain_overflow_unsigned, /* complain_on_overflow */
492 bfd_elf_generic_reloc, /* special_function */
493 "R_CR16_SWITCH8", /* name */
494 false, /* partial_inplace */
495 0x0, /* src_mask */
496 0xff, /* dst_mask */
497 true), /* pcrel_offset */
498
499 /* A 16 bit switch table entry. This is generated for an expression
500 such as ``.word L1 - L2''. The offset holds the difference
501 between the reloc address and L2. */
502 HOWTO (R_CR16_SWITCH16, /* type */
503 0, /* rightshift */
504 2, /* size */
505 16, /* bitsize */
506 false, /* pc_relative */
507 0, /* bitpos */
508 complain_overflow_unsigned, /* complain_on_overflow */
509 bfd_elf_generic_reloc, /* special_function */
510 "R_CR16_SWITCH16", /* name */
511 false, /* partial_inplace */
512 0x0, /* src_mask */
513 0xffff, /* dst_mask */
514 true), /* pcrel_offset */
515
516 /* A 32 bit switch table entry. This is generated for an expression
517 such as ``.long L1 - L2''. The offset holds the difference
518 between the reloc address and L2. */
519 HOWTO (R_CR16_SWITCH32, /* type */
520 0, /* rightshift */
521 4, /* size */
522 32, /* bitsize */
523 false, /* pc_relative */
524 0, /* bitpos */
525 complain_overflow_unsigned, /* complain_on_overflow */
526 bfd_elf_generic_reloc, /* special_function */
527 "R_CR16_SWITCH32", /* name */
528 false, /* partial_inplace */
529 0x0, /* src_mask */
530 0xffffffff, /* dst_mask */
531 true), /* pcrel_offset */
532
533 HOWTO (R_CR16_GOT_REGREL20, /* type */
534 0, /* rightshift */
535 4, /* size */
536 20, /* bitsize */
537 false, /* pc_relative */
538 0, /* bitpos */
539 complain_overflow_bitfield,/* complain_on_overflow */
540 bfd_elf_generic_reloc, /* special_function */
541 "R_CR16_GOT_REGREL20", /* name */
542 true, /* partial_inplace */
543 0x0, /* src_mask */
544 0xfffff, /* dst_mask */
545 false), /* pcrel_offset */
546
547 HOWTO (R_CR16_GOTC_REGREL20, /* type */
548 0, /* rightshift */
549 4, /* size */
550 20, /* bitsize */
551 false, /* pc_relative */
552 0, /* bitpos */
553 complain_overflow_bitfield,/* complain_on_overflow */
554 bfd_elf_generic_reloc, /* special_function */
555 "R_CR16_GOTC_REGREL20", /* name */
556 true, /* partial_inplace */
557 0x0, /* src_mask */
558 0xfffff, /* dst_mask */
559 false), /* pcrel_offset */
560
561 HOWTO (R_CR16_GLOB_DAT, /* type */
562 0, /* rightshift */
563 4, /* size */
564 32, /* bitsize */
565 false, /* pc_relative */
566 0, /* bitpos */
567 complain_overflow_unsigned, /* complain_on_overflow */
568 bfd_elf_generic_reloc, /* special_function */
569 "R_CR16_GLOB_DAT", /* name */
570 false, /* partial_inplace */
571 0x0, /* src_mask */
572 0xffffffff, /* dst_mask */
573 true) /* pcrel_offset */
574 };
575
576
577 /* Create the GOT section. */
578
579 static bool
580 _bfd_cr16_elf_create_got_section (bfd * abfd, struct bfd_link_info * info)
581 {
582 flagword flags;
583 asection * s;
584 struct elf_link_hash_entry * h;
585 const struct elf_backend_data * bed = get_elf_backend_data (abfd);
586 struct elf_link_hash_table *htab = elf_hash_table (info);
587 int ptralign;
588
589 /* This function may be called more than once. */
590 if (htab->sgot != NULL)
591 return true;
592
593 switch (bed->s->arch_size)
594 {
595 case 16:
596 ptralign = 1;
597 break;
598
599 case 32:
600 ptralign = 2;
601 break;
602
603 default:
604 bfd_set_error (bfd_error_bad_value);
605 return false;
606 }
607
608 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
609 | SEC_LINKER_CREATED);
610
611 s = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
612 htab->sgot= s;
613 if (s == NULL
614 || !bfd_set_section_alignment (s, ptralign))
615 return false;
616
617 if (bed->want_got_plt)
618 {
619 s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags);
620 htab->sgotplt = s;
621 if (s == NULL
622 || !bfd_set_section_alignment (s, ptralign))
623 return false;
624 }
625
626 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
627 (or .got.plt) section. We don't do this in the linker script
628 because we don't want to define the symbol if we are not creating
629 a global offset table. */
630 h = _bfd_elf_define_linkage_sym (abfd, info, s, "_GLOBAL_OFFSET_TABLE_");
631 htab->hgot = h;
632 if (h == NULL)
633 return false;
634
635 /* The first bit of the global offset table is the header. */
636 s->size += bed->got_header_size;
637
638 return true;
639 }
640
641
642 /* Retrieve a howto ptr using a BFD reloc_code. */
643
644 static reloc_howto_type *
645 elf_cr16_reloc_type_lookup (bfd *abfd,
646 bfd_reloc_code_real_type code)
647 {
648 unsigned int i;
649
650 for (i = 0; i < R_CR16_MAX; i++)
651 if (code == cr16_reloc_map[i].bfd_reloc_enum)
652 return &cr16_elf_howto_table[cr16_reloc_map[i].cr16_reloc_type];
653
654 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
655 abfd, code);
656 return NULL;
657 }
658
659 static reloc_howto_type *
660 elf_cr16_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
661 const char *r_name)
662 {
663 unsigned int i;
664
665 for (i = 0; ARRAY_SIZE (cr16_elf_howto_table); i++)
666 if (cr16_elf_howto_table[i].name != NULL
667 && strcasecmp (cr16_elf_howto_table[i].name, r_name) == 0)
668 return cr16_elf_howto_table + i;
669
670 return NULL;
671 }
672
673 /* Retrieve a howto ptr using an internal relocation entry. */
674
675 static bool
676 elf_cr16_info_to_howto (bfd *abfd, arelent *cache_ptr,
677 Elf_Internal_Rela *dst)
678 {
679 unsigned int r_type = ELF32_R_TYPE (dst->r_info);
680
681 if (r_type >= R_CR16_MAX)
682 {
683 /* xgettext:c-format */
684 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
685 abfd, r_type);
686 bfd_set_error (bfd_error_bad_value);
687 return false;
688 }
689 cache_ptr->howto = cr16_elf_howto_table + r_type;
690 return true;
691 }
692
693 /* Look through the relocs for a section during the first phase.
694 Since we don't do .gots or .plts, we just need to consider the
695 virtual table relocs for gc. */
696
697 static bool
698 cr16_elf_check_relocs (bfd *abfd, struct bfd_link_info *info, asection *sec,
699 const Elf_Internal_Rela *relocs)
700 {
701 Elf_Internal_Shdr *symtab_hdr;
702 Elf_Internal_Sym * isymbuf = NULL;
703 struct elf_link_hash_entry **sym_hashes;
704 const Elf_Internal_Rela *rel;
705 const Elf_Internal_Rela *rel_end;
706 bfd * dynobj;
707 bfd_vma * local_got_offsets;
708 asection * sgot;
709 asection * srelgot;
710
711 sgot = NULL;
712 srelgot = NULL;
713 bool result = false;
714
715 if (bfd_link_relocatable (info))
716 return true;
717
718 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
719 sym_hashes = elf_sym_hashes (abfd);
720
721 dynobj = elf_hash_table (info)->dynobj;
722 local_got_offsets = elf_local_got_offsets (abfd);
723 rel_end = relocs + sec->reloc_count;
724 for (rel = relocs; rel < rel_end; rel++)
725 {
726 struct elf_link_hash_entry *h;
727 unsigned long r_symndx;
728
729 r_symndx = ELF32_R_SYM (rel->r_info);
730 if (r_symndx < symtab_hdr->sh_info)
731 h = NULL;
732 else
733 {
734 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
735 while (h->root.type == bfd_link_hash_indirect
736 || h->root.type == bfd_link_hash_warning)
737 h = (struct elf_link_hash_entry *) h->root.u.i.link;
738 }
739
740 /* Some relocs require a global offset table. */
741 if (dynobj == NULL)
742 {
743 switch (ELF32_R_TYPE (rel->r_info))
744 {
745 case R_CR16_GOT_REGREL20:
746 case R_CR16_GOTC_REGREL20:
747 elf_hash_table (info)->dynobj = dynobj = abfd;
748 if (! _bfd_cr16_elf_create_got_section (dynobj, info))
749 goto fail;
750 break;
751
752 default:
753 break;
754 }
755 }
756
757 switch (ELF32_R_TYPE (rel->r_info))
758 {
759 case R_CR16_GOT_REGREL20:
760 case R_CR16_GOTC_REGREL20:
761 /* This symbol requires a global offset table entry. */
762
763 sgot = elf_hash_table (info)->sgot;
764 srelgot = elf_hash_table (info)->srelgot;
765 BFD_ASSERT (sgot != NULL && srelgot != NULL);
766
767 if (h != NULL)
768 {
769 if (h->got.offset != (bfd_vma) -1)
770 /* We have already allocated space in the .got. */
771 break;
772
773 h->got.offset = sgot->size;
774
775 /* Make sure this symbol is output as a dynamic symbol. */
776 if (h->dynindx == -1)
777 {
778 if (! bfd_elf_link_record_dynamic_symbol (info, h))
779 goto fail;
780 }
781
782 srelgot->size += sizeof (Elf32_External_Rela);
783 }
784 else
785 {
786 /* This is a global offset table entry for a local
787 symbol. */
788 if (local_got_offsets == NULL)
789 {
790 size_t size;
791 unsigned int i;
792
793 size = symtab_hdr->sh_info * sizeof (bfd_vma);
794 local_got_offsets = (bfd_vma *) bfd_alloc (abfd, size);
795
796 if (local_got_offsets == NULL)
797 goto fail;
798
799 elf_local_got_offsets (abfd) = local_got_offsets;
800
801 for (i = 0; i < symtab_hdr->sh_info; i++)
802 local_got_offsets[i] = (bfd_vma) -1;
803 }
804
805 if (local_got_offsets[r_symndx] != (bfd_vma) -1)
806 /* We have already allocated space in the .got. */
807 break;
808
809 local_got_offsets[r_symndx] = sgot->size;
810
811 if (bfd_link_executable (info))
812 /* If we are generating a shared object, we need to
813 output a R_CR16_RELATIVE reloc so that the dynamic
814 linker can adjust this GOT entry. */
815 srelgot->size += sizeof (Elf32_External_Rela);
816 }
817
818 sgot->size += 4;
819 break;
820
821 }
822 }
823
824 result = true;
825 fail:
826 free (isymbuf);
827
828 return result;
829 }
830
831 /* Perform a relocation as part of a final link. */
832
833 static bfd_reloc_status_type
834 cr16_elf_final_link_relocate (reloc_howto_type *howto,
835 bfd *input_bfd,
836 bfd *output_bfd ATTRIBUTE_UNUSED,
837 asection *input_section,
838 bfd_byte *contents,
839 bfd_vma offset,
840 bfd_vma Rvalue,
841 bfd_vma addend,
842 struct elf_link_hash_entry * h,
843 unsigned long symndx ATTRIBUTE_UNUSED,
844 struct bfd_link_info *info ATTRIBUTE_UNUSED,
845 asection *sec ATTRIBUTE_UNUSED,
846 int is_local ATTRIBUTE_UNUSED)
847 {
848 unsigned short r_type = howto->type;
849 bfd_byte *hit_data = contents + offset;
850 bfd_vma reloc_bits, check, Rvalue1;
851
852 switch (r_type)
853 {
854 case R_CR16_IMM4:
855 case R_CR16_IMM20:
856 case R_CR16_ABS20:
857 break;
858
859 case R_CR16_IMM8:
860 case R_CR16_IMM16:
861 case R_CR16_IMM32:
862 case R_CR16_IMM32a:
863 case R_CR16_REGREL4:
864 case R_CR16_REGREL4a:
865 case R_CR16_REGREL14:
866 case R_CR16_REGREL14a:
867 case R_CR16_REGREL16:
868 case R_CR16_REGREL20:
869 case R_CR16_REGREL20a:
870 case R_CR16_GOT_REGREL20:
871 case R_CR16_GOTC_REGREL20:
872 case R_CR16_ABS24:
873 case R_CR16_DISP16:
874 case R_CR16_DISP24:
875 /* 'hit_data' is relative to the start of the instruction, not the
876 relocation offset. Advance it to account for the exact offset. */
877 hit_data += 2;
878 break;
879
880 case R_CR16_NONE:
881 return bfd_reloc_ok;
882 break;
883
884 case R_CR16_DISP4:
885 if (is_local)
886 Rvalue += -1;
887 break;
888
889 case R_CR16_DISP8:
890 case R_CR16_DISP24a:
891 if (is_local)
892 Rvalue -= -1;
893 break;
894
895 case R_CR16_SWITCH8:
896 case R_CR16_SWITCH16:
897 case R_CR16_SWITCH32:
898 /* We only care about the addend, where the difference between
899 expressions is kept. */
900 Rvalue = 0;
901
902 default:
903 break;
904 }
905
906 if (howto->pc_relative)
907 {
908 /* Subtract the address of the section containing the location. */
909 Rvalue -= (input_section->output_section->vma
910 + input_section->output_offset);
911 /* Subtract the position of the location within the section. */
912 Rvalue -= offset;
913 }
914
915 /* Add in supplied addend. */
916 Rvalue += addend;
917
918 /* Complain if the bitfield overflows, whether it is considered
919 as signed or unsigned. */
920 check = Rvalue >> howto->rightshift;
921
922 reloc_bits = ((bfd_vma) 1 << (howto->bitsize - 1) << 1) - 1;
923
924 /* For GOT and GOTC relocs no boundary checks applied. */
925 if (!((r_type == R_CR16_GOT_REGREL20)
926 || (r_type == R_CR16_GOTC_REGREL20)))
927 {
928 if (((bfd_vma) check & ~reloc_bits) != 0
929 && (((bfd_vma) check & ~reloc_bits)
930 != (-(bfd_vma) 1 & ~reloc_bits)))
931 {
932 /* The above right shift is incorrect for a signed
933 value. See if turning on the upper bits fixes the
934 overflow. */
935 if (howto->rightshift && (bfd_signed_vma) Rvalue < 0)
936 {
937 check |= ((bfd_vma) -1
938 & ~((bfd_vma) -1 >> howto->rightshift));
939
940 if (((bfd_vma) check & ~reloc_bits)
941 != (-(bfd_vma) 1 & ~reloc_bits))
942 return bfd_reloc_overflow;
943 }
944 else
945 return bfd_reloc_overflow;
946 }
947
948 /* Drop unwanted bits from the value we are relocating to. */
949 Rvalue >>= (bfd_vma) howto->rightshift;
950
951 /* Apply dst_mask to select only relocatable part of the insn. */
952 Rvalue &= howto->dst_mask;
953 }
954
955 switch (bfd_get_reloc_size (howto))
956 {
957 case 1:
958 if (r_type == R_CR16_DISP8)
959 {
960 Rvalue1 = bfd_get_16 (input_bfd, hit_data);
961 Rvalue = ((Rvalue1 & 0xf000) | ((Rvalue << 4) & 0xf00)
962 | (Rvalue1 & 0x00f0) | (Rvalue & 0xf));
963 bfd_put_16 (input_bfd, Rvalue, hit_data);
964 }
965 else if (r_type == R_CR16_IMM4)
966 {
967 Rvalue1 = bfd_get_16 (input_bfd, hit_data);
968 Rvalue = (((Rvalue1 & 0xff) << 8) | ((Rvalue << 4) & 0xf0)
969 | ((Rvalue1 & 0x0f00) >> 8));
970 bfd_put_16 (input_bfd, Rvalue, hit_data);
971 }
972 else if (r_type == R_CR16_DISP4)
973 {
974 Rvalue1 = bfd_get_16 (input_bfd, hit_data);
975 Rvalue = (Rvalue1 | ((Rvalue & 0xf) << 4));
976 bfd_put_16 (input_bfd, Rvalue, hit_data);
977 }
978 else
979 {
980 bfd_put_8 (input_bfd, (unsigned char) Rvalue, hit_data);
981 }
982 break;
983
984 case 2:
985 if (r_type == R_CR16_DISP16)
986 {
987 Rvalue |= (bfd_get_16 (input_bfd, hit_data));
988 Rvalue = ((Rvalue & 0xfffe) | ((Rvalue >> 16) & 0x1));
989 }
990 if (r_type == R_CR16_IMM16)
991 {
992 Rvalue1 = bfd_get_16 (input_bfd, hit_data);
993
994 Rvalue1 = (Rvalue1 ^ 0x8000) - 0x8000;
995 Rvalue += Rvalue1;
996
997 /* Check for range. */
998 if (Rvalue > 0xffff)
999 return bfd_reloc_overflow;
1000 }
1001
1002 bfd_put_16 (input_bfd, Rvalue, hit_data);
1003 break;
1004
1005 case 4:
1006 if ((r_type == R_CR16_ABS20) || (r_type == R_CR16_IMM20))
1007 {
1008 Rvalue1 = (bfd_get_16 (input_bfd, hit_data + 2)
1009 | (((bfd_get_16 (input_bfd, hit_data) & 0xf) << 16)));
1010
1011 Rvalue1 = (Rvalue1 ^ 0x80000) - 0x80000;
1012 Rvalue += Rvalue1;
1013
1014 /* Check for range. */
1015 if (Rvalue > 0xfffff)
1016 return bfd_reloc_overflow;
1017
1018 bfd_put_16 (input_bfd, ((bfd_get_16 (input_bfd, hit_data) & 0xfff0)
1019 | ((Rvalue >> 16) & 0xf)), hit_data);
1020 bfd_put_16 (input_bfd, (Rvalue) & 0xffff, hit_data + 2);
1021 }
1022 else if (r_type == R_CR16_GOT_REGREL20)
1023 {
1024 asection *sgot = elf_hash_table (info)->sgot;
1025 bfd_vma off;
1026
1027 if (h != NULL)
1028 {
1029 off = h->got.offset;
1030 BFD_ASSERT (off != (bfd_vma) -1);
1031
1032 if (! elf_hash_table (info)->dynamic_sections_created
1033 || SYMBOL_REFERENCES_LOCAL (info, h))
1034 /* This is actually a static link, or it is a
1035 -Bsymbolic link and the symbol is defined
1036 locally, or the symbol was forced to be local
1037 because of a version file. We must initialize
1038 this entry in the global offset table.
1039 When doing a dynamic link, we create a .rela.got
1040 relocation entry to initialize the value. This
1041 is done in the finish_dynamic_symbol routine. */
1042 bfd_put_32 (output_bfd, Rvalue, sgot->contents + off);
1043 }
1044 else
1045 {
1046 off = elf_local_got_offsets (input_bfd)[symndx];
1047 bfd_put_32 (output_bfd, Rvalue, sgot->contents + off);
1048 }
1049
1050 Rvalue = sgot->output_offset + off;
1051 Rvalue += addend;
1052
1053 /* REVISIT: if ((long) Rvalue > 0xffffff ||
1054 (long) Rvalue < -0x800000). */
1055 if (Rvalue > 0xffffff)
1056 return bfd_reloc_overflow;
1057
1058
1059 bfd_put_16 (input_bfd, (bfd_get_16 (input_bfd, hit_data))
1060 | (((Rvalue >> 16) & 0xf) << 8), hit_data);
1061 bfd_put_16 (input_bfd, (Rvalue) & 0xffff, hit_data + 2);
1062
1063 }
1064 else if (r_type == R_CR16_GOTC_REGREL20)
1065 {
1066 asection *sgot = elf_hash_table (info)->sgot;
1067 bfd_vma off;
1068
1069 if (h != NULL)
1070 {
1071 off = h->got.offset;
1072 BFD_ASSERT (off != (bfd_vma) -1);
1073
1074 Rvalue >>= 1; /* For code symbols. */
1075
1076 if (! elf_hash_table (info)->dynamic_sections_created
1077 || SYMBOL_REFERENCES_LOCAL (info, h))
1078 /* This is actually a static link, or it is a
1079 -Bsymbolic link and the symbol is defined
1080 locally, or the symbol was forced to be local
1081 because of a version file. We must initialize
1082 this entry in the global offset table.
1083 When doing a dynamic link, we create a .rela.got
1084 relocation entry to initialize the value. This
1085 is done in the finish_dynamic_symbol routine. */
1086 bfd_put_32 (output_bfd, Rvalue, sgot->contents + off);
1087 }
1088 else
1089 {
1090 off = elf_local_got_offsets (input_bfd)[symndx];
1091 Rvalue >>= 1;
1092 bfd_put_32 (output_bfd, Rvalue, sgot->contents + off);
1093 }
1094
1095 Rvalue = sgot->output_offset + off;
1096 Rvalue += addend;
1097
1098 /* Check if any value in DISP. */
1099 Rvalue1 = bfd_get_32 (input_bfd, hit_data);
1100 Rvalue1 = ((Rvalue1 >> 16) | ((Rvalue1 & 0xfff) >> 8 << 16));
1101
1102 Rvalue1 = (Rvalue1 ^ 0x80000) - 0x80000;
1103 Rvalue += Rvalue1;
1104
1105 /* Check for range. */
1106 /* REVISIT: if ((long) Rvalue > 0xffffff
1107 || (long) Rvalue < -0x800000). */
1108 if (Rvalue > 0xffffff)
1109 return bfd_reloc_overflow;
1110
1111 bfd_put_16 (input_bfd, (bfd_get_16 (input_bfd, hit_data))
1112 | (((Rvalue >> 16) & 0xf) << 8), hit_data);
1113 bfd_put_16 (input_bfd, (Rvalue) & 0xffff, hit_data + 2);
1114 }
1115 else
1116 {
1117 if (r_type == R_CR16_ABS24)
1118 {
1119 Rvalue1 = bfd_get_32 (input_bfd, hit_data);
1120 Rvalue1 = ((Rvalue1 >> 16)
1121 | ((Rvalue1 & 0xfff) >> 8 << 16)
1122 | ((Rvalue1 & 0xf) << 20));
1123
1124 Rvalue1 = (Rvalue1 ^ 0x800000) - 0x800000;
1125 Rvalue += Rvalue1;
1126
1127 /* Check for Range. */
1128 if (Rvalue > 0xffffff)
1129 return bfd_reloc_overflow;
1130
1131 Rvalue = ((((Rvalue >> 20) & 0xf) | (((Rvalue >> 16) & 0xf)<<8)
1132 | (bfd_get_32 (input_bfd, hit_data) & 0xf0f0))
1133 | ((Rvalue & 0xffff) << 16));
1134 }
1135 else if (r_type == R_CR16_DISP24)
1136 {
1137 Rvalue = ((((Rvalue >> 20)& 0xf) | (((Rvalue >>16) & 0xf)<<8)
1138 | (bfd_get_16 (input_bfd, hit_data)))
1139 | (((Rvalue & 0xfffe) | ((Rvalue >> 24) & 0x1)) << 16));
1140 }
1141 else if ((r_type == R_CR16_IMM32) || (r_type == R_CR16_IMM32a))
1142 {
1143 Rvalue1 = bfd_get_32 (input_bfd, hit_data);
1144 Rvalue1 = (((Rvalue1 >> 16) & 0xffff)
1145 | ((Rvalue1 & 0xffff) << 16));
1146
1147 Rvalue1 = (Rvalue1 ^ 0x80000000) - 0x80000000;
1148 Rvalue += Rvalue1;
1149
1150 /* Check for range. */
1151 if (Rvalue > 0xffffffff)
1152 return bfd_reloc_overflow;
1153
1154 Rvalue = (((Rvalue >> 16) & 0xffff) | (Rvalue & 0xffff) << 16);
1155 }
1156 else if (r_type == R_CR16_DISP24a)
1157 {
1158 Rvalue = (((Rvalue & 0xfffffe) | (Rvalue >> 23)));
1159 Rvalue = (((Rvalue >> 16) & 0xff) | ((Rvalue & 0xffff) << 16)
1160 | bfd_get_32 (input_bfd, hit_data));
1161 }
1162 else if ((r_type == R_CR16_REGREL20)
1163 || (r_type == R_CR16_REGREL20a))
1164 {
1165 Rvalue1 = bfd_get_32 (input_bfd, hit_data);
1166 Rvalue1 = (((Rvalue1 >> 16) & 0xffff)
1167 | ((Rvalue1 & 0xfff) >> 8 << 16));
1168
1169 Rvalue1 = (Rvalue1 ^ 0x80000) - 0x80000;
1170 Rvalue += Rvalue1;
1171
1172 /* Check for range. */
1173 if (Rvalue > 0xfffff)
1174 return bfd_reloc_overflow;
1175
1176 Rvalue = (((((Rvalue >> 20) & 0xf) | (((Rvalue >> 16) & 0xf) << 8)
1177 | ((Rvalue & 0xffff) << 16)))
1178 | (bfd_get_32 (input_bfd, hit_data) & 0xf0ff));
1179
1180 }
1181 else if (r_type == R_CR16_NUM32)
1182 {
1183 Rvalue1 = (bfd_get_32 (input_bfd, hit_data));
1184
1185 Rvalue1 = (Rvalue1 ^ 0x80000000) - 0x80000000;
1186 Rvalue += Rvalue1;
1187
1188 /* Check for Range. */
1189 if (Rvalue > 0xffffffff)
1190 return bfd_reloc_overflow;
1191 }
1192
1193 bfd_put_32 (input_bfd, Rvalue, hit_data);
1194 }
1195 break;
1196
1197 default:
1198 return bfd_reloc_notsupported;
1199 }
1200
1201 return bfd_reloc_ok;
1202 }
1203
1204 /* Delete some bytes from a section while relaxing. */
1205
1206 static bool
1207 elf32_cr16_relax_delete_bytes (struct bfd_link_info *link_info, bfd *abfd,
1208 asection *sec, bfd_vma addr, int count)
1209 {
1210 Elf_Internal_Shdr *symtab_hdr;
1211 unsigned int sec_shndx;
1212 bfd_byte *contents;
1213 Elf_Internal_Rela *irel, *irelend;
1214 bfd_vma toaddr;
1215 Elf_Internal_Sym *isym;
1216 Elf_Internal_Sym *isymend;
1217 struct elf_link_hash_entry **sym_hashes;
1218 struct elf_link_hash_entry **end_hashes;
1219 struct elf_link_hash_entry **start_hashes;
1220 unsigned int symcount;
1221
1222 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
1223
1224 contents = elf_section_data (sec)->this_hdr.contents;
1225
1226 toaddr = sec->size;
1227
1228 irel = elf_section_data (sec)->relocs;
1229 irelend = irel + sec->reloc_count;
1230
1231 /* Actually delete the bytes. */
1232 memmove (contents + addr, contents + addr + count,
1233 (size_t) (toaddr - addr - count));
1234 sec->size -= count;
1235
1236 /* Adjust all the relocs. */
1237 for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
1238 /* Get the new reloc address. */
1239 if ((irel->r_offset > addr && irel->r_offset < toaddr))
1240 irel->r_offset -= count;
1241
1242 /* Adjust the local symbols defined in this section. */
1243 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1244 isym = (Elf_Internal_Sym *) symtab_hdr->contents;
1245 for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
1246 {
1247 if (isym->st_shndx == sec_shndx
1248 && isym->st_value > addr
1249 && isym->st_value < toaddr)
1250 {
1251 /* Adjust the addend of SWITCH relocations in this section,
1252 which reference this local symbol. */
1253 #if 0
1254 for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
1255 {
1256 unsigned long r_symndx;
1257 Elf_Internal_Sym *rsym;
1258 bfd_vma addsym, subsym;
1259
1260 /* Skip if not a SWITCH relocation. */
1261 if (ELF32_R_TYPE (irel->r_info) != (int) R_CR16_SWITCH8
1262 && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_SWITCH16
1263 && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_SWITCH32)
1264 continue;
1265
1266 r_symndx = ELF32_R_SYM (irel->r_info);
1267 rsym = (Elf_Internal_Sym *) symtab_hdr->contents + r_symndx;
1268
1269 /* Skip if not the local adjusted symbol. */
1270 if (rsym != isym)
1271 continue;
1272
1273 addsym = isym->st_value;
1274 subsym = addsym - irel->r_addend;
1275
1276 /* Fix the addend only when -->> (addsym > addr >= subsym). */
1277 if (subsym <= addr)
1278 irel->r_addend -= count;
1279 else
1280 continue;
1281 }
1282 #endif
1283
1284 isym->st_value -= count;
1285 }
1286 }
1287
1288 /* Now adjust the global symbols defined in this section. */
1289 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
1290 - symtab_hdr->sh_info);
1291 sym_hashes = start_hashes = elf_sym_hashes (abfd);
1292 end_hashes = sym_hashes + symcount;
1293
1294 for (; sym_hashes < end_hashes; sym_hashes++)
1295 {
1296 struct elf_link_hash_entry *sym_hash = *sym_hashes;
1297
1298 /* The '--wrap SYMBOL' option is causing a pain when the object file,
1299 containing the definition of __wrap_SYMBOL, includes a direct
1300 call to SYMBOL as well. Since both __wrap_SYMBOL and SYMBOL reference
1301 the same symbol (which is __wrap_SYMBOL), but still exist as two
1302 different symbols in 'sym_hashes', we don't want to adjust
1303 the global symbol __wrap_SYMBOL twice.
1304 This check is only relevant when symbols are being wrapped. */
1305 if (link_info->wrap_hash != NULL)
1306 {
1307 struct elf_link_hash_entry **cur_sym_hashes;
1308
1309 /* Loop only over the symbols whom been already checked. */
1310 for (cur_sym_hashes = start_hashes; cur_sym_hashes < sym_hashes;
1311 cur_sym_hashes++)
1312 /* If the current symbol is identical to 'sym_hash', that means
1313 the symbol was already adjusted (or at least checked). */
1314 if (*cur_sym_hashes == sym_hash)
1315 break;
1316
1317 /* Don't adjust the symbol again. */
1318 if (cur_sym_hashes < sym_hashes)
1319 continue;
1320 }
1321
1322 if ((sym_hash->root.type == bfd_link_hash_defined
1323 || sym_hash->root.type == bfd_link_hash_defweak)
1324 && sym_hash->root.u.def.section == sec
1325 && sym_hash->root.u.def.value > addr
1326 && sym_hash->root.u.def.value < toaddr)
1327 sym_hash->root.u.def.value -= count;
1328 }
1329
1330 return true;
1331 }
1332
1333 /* Relocate a CR16 ELF section. */
1334
1335 static int
1336 elf32_cr16_relocate_section (bfd *output_bfd, struct bfd_link_info *info,
1337 bfd *input_bfd, asection *input_section,
1338 bfd_byte *contents, Elf_Internal_Rela *relocs,
1339 Elf_Internal_Sym *local_syms,
1340 asection **local_sections)
1341 {
1342 Elf_Internal_Shdr *symtab_hdr;
1343 struct elf_link_hash_entry **sym_hashes;
1344 Elf_Internal_Rela *rel, *relend;
1345
1346 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1347 sym_hashes = elf_sym_hashes (input_bfd);
1348
1349 rel = relocs;
1350 relend = relocs + input_section->reloc_count;
1351 for (; rel < relend; rel++)
1352 {
1353 int r_type;
1354 reloc_howto_type *howto;
1355 unsigned long r_symndx;
1356 Elf_Internal_Sym *sym;
1357 asection *sec;
1358 struct elf_link_hash_entry *h;
1359 bfd_vma relocation;
1360 bfd_reloc_status_type r;
1361
1362 r_symndx = ELF32_R_SYM (rel->r_info);
1363 r_type = ELF32_R_TYPE (rel->r_info);
1364 howto = cr16_elf_howto_table + (r_type);
1365
1366 h = NULL;
1367 sym = NULL;
1368 sec = NULL;
1369 if (r_symndx < symtab_hdr->sh_info)
1370 {
1371 sym = local_syms + r_symndx;
1372 sec = local_sections[r_symndx];
1373 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1374 }
1375 else
1376 {
1377 bool unresolved_reloc, warned, ignored;
1378
1379 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1380 r_symndx, symtab_hdr, sym_hashes,
1381 h, sec, relocation,
1382 unresolved_reloc, warned, ignored);
1383 }
1384
1385 if (sec != NULL && discarded_section (sec))
1386 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1387 rel, 1, relend, howto, 0, contents);
1388
1389 if (bfd_link_relocatable (info))
1390 continue;
1391
1392 r = cr16_elf_final_link_relocate (howto, input_bfd, output_bfd,
1393 input_section,
1394 contents, rel->r_offset,
1395 relocation, rel->r_addend,
1396 (struct elf_link_hash_entry *) h,
1397 r_symndx,
1398 info, sec, h == NULL);
1399
1400 if (r != bfd_reloc_ok)
1401 {
1402 const char *name;
1403 const char *msg = NULL;
1404
1405 if (h != NULL)
1406 name = h->root.root.string;
1407 else
1408 {
1409 name = (bfd_elf_string_from_elf_section
1410 (input_bfd, symtab_hdr->sh_link, sym->st_name));
1411 if (name == NULL || *name == '\0')
1412 name = bfd_section_name (sec);
1413 }
1414
1415 switch (r)
1416 {
1417 case bfd_reloc_overflow:
1418 (*info->callbacks->reloc_overflow)
1419 (info, (h ? &h->root : NULL), name, howto->name,
1420 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
1421 break;
1422
1423 case bfd_reloc_undefined:
1424 (*info->callbacks->undefined_symbol)
1425 (info, name, input_bfd, input_section, rel->r_offset, true);
1426 break;
1427
1428 case bfd_reloc_outofrange:
1429 msg = _("internal error: out of range error");
1430 goto common_error;
1431
1432 case bfd_reloc_notsupported:
1433 msg = _("internal error: unsupported relocation error");
1434 goto common_error;
1435
1436 case bfd_reloc_dangerous:
1437 msg = _("internal error: dangerous error");
1438 goto common_error;
1439
1440 default:
1441 msg = _("internal error: unknown error");
1442 /* Fall through. */
1443
1444 common_error:
1445 (*info->callbacks->warning) (info, msg, name, input_bfd,
1446 input_section, rel->r_offset);
1447 break;
1448 }
1449 }
1450 }
1451
1452 return true;
1453 }
1454
1455 /* This is a version of bfd_generic_get_relocated_section_contents
1456 which uses elf32_cr16_relocate_section. */
1457
1458 static bfd_byte *
1459 elf32_cr16_get_relocated_section_contents (bfd *output_bfd,
1460 struct bfd_link_info *link_info,
1461 struct bfd_link_order *link_order,
1462 bfd_byte *data,
1463 bool relocatable,
1464 asymbol **symbols)
1465 {
1466 Elf_Internal_Shdr *symtab_hdr;
1467 asection *input_section = link_order->u.indirect.section;
1468 bfd *input_bfd = input_section->owner;
1469 asection **sections = NULL;
1470 Elf_Internal_Rela *internal_relocs = NULL;
1471 Elf_Internal_Sym *isymbuf = NULL;
1472
1473 /* We only need to handle the case of relaxing, or of having a
1474 particular set of section contents, specially. */
1475 if (relocatable
1476 || elf_section_data (input_section)->this_hdr.contents == NULL)
1477 return bfd_generic_get_relocated_section_contents (output_bfd, link_info,
1478 link_order, data,
1479 relocatable,
1480 symbols);
1481
1482 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1483
1484 memcpy (data, elf_section_data (input_section)->this_hdr.contents,
1485 (size_t) input_section->size);
1486
1487 if ((input_section->flags & SEC_RELOC) != 0
1488 && input_section->reloc_count > 0)
1489 {
1490 Elf_Internal_Sym *isym;
1491 Elf_Internal_Sym *isymend;
1492 asection **secpp;
1493 bfd_size_type amt;
1494
1495 internal_relocs = _bfd_elf_link_read_relocs (input_bfd, input_section,
1496 NULL, NULL, false);
1497 if (internal_relocs == NULL)
1498 goto error_return;
1499
1500 if (symtab_hdr->sh_info != 0)
1501 {
1502 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1503 if (isymbuf == NULL)
1504 isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
1505 symtab_hdr->sh_info, 0,
1506 NULL, NULL, NULL);
1507 if (isymbuf == NULL)
1508 goto error_return;
1509 }
1510
1511 amt = symtab_hdr->sh_info;
1512 amt *= sizeof (asection *);
1513 sections = bfd_malloc (amt);
1514 if (sections == NULL && amt != 0)
1515 goto error_return;
1516
1517 isymend = isymbuf + symtab_hdr->sh_info;
1518 for (isym = isymbuf, secpp = sections; isym < isymend; ++isym, ++secpp)
1519 {
1520 asection *isec;
1521
1522 if (isym->st_shndx == SHN_UNDEF)
1523 isec = bfd_und_section_ptr;
1524 else if (isym->st_shndx == SHN_ABS)
1525 isec = bfd_abs_section_ptr;
1526 else if (isym->st_shndx == SHN_COMMON)
1527 isec = bfd_com_section_ptr;
1528 else
1529 isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx);
1530
1531 *secpp = isec;
1532 }
1533
1534 if (! elf32_cr16_relocate_section (output_bfd, link_info, input_bfd,
1535 input_section, data, internal_relocs,
1536 isymbuf, sections))
1537 goto error_return;
1538
1539 free (sections);
1540 if (symtab_hdr->contents != (unsigned char *) isymbuf)
1541 free (isymbuf);
1542 if (elf_section_data (input_section)->relocs != internal_relocs)
1543 free (internal_relocs);
1544 }
1545
1546 return data;
1547
1548 error_return:
1549 free (sections);
1550 if (symtab_hdr->contents != (unsigned char *) isymbuf)
1551 free (isymbuf);
1552 if (elf_section_data (input_section)->relocs != internal_relocs)
1553 free (internal_relocs);
1554 return NULL;
1555 }
1556
1557 /* Assorted hash table functions. */
1558
1559 /* Initialize an entry in the link hash table. */
1560
1561 /* Create an entry in an CR16 ELF linker hash table. */
1562
1563 static struct bfd_hash_entry *
1564 elf32_cr16_link_hash_newfunc (struct bfd_hash_entry *entry,
1565 struct bfd_hash_table *table,
1566 const char *string)
1567 {
1568 struct elf32_cr16_link_hash_entry *ret =
1569 (struct elf32_cr16_link_hash_entry *) entry;
1570
1571 /* Allocate the structure if it has not already been allocated by a
1572 subclass. */
1573 if (ret == (struct elf32_cr16_link_hash_entry *) NULL)
1574 ret = ((struct elf32_cr16_link_hash_entry *)
1575 bfd_hash_allocate (table,
1576 sizeof (struct elf32_cr16_link_hash_entry)));
1577 if (ret == (struct elf32_cr16_link_hash_entry *) NULL)
1578 return (struct bfd_hash_entry *) ret;
1579
1580 /* Call the allocation method of the superclass. */
1581 ret = ((struct elf32_cr16_link_hash_entry *)
1582 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
1583 table, string));
1584 if (ret != (struct elf32_cr16_link_hash_entry *) NULL)
1585 {
1586 ret->direct_calls = 0;
1587 ret->stack_size = 0;
1588 ret->movm_args = 0;
1589 ret->movm_stack_size = 0;
1590 ret->flags = 0;
1591 ret->value = 0;
1592 }
1593
1594 return (struct bfd_hash_entry *) ret;
1595 }
1596
1597 /* Create an cr16 ELF linker hash table. */
1598
1599 static struct bfd_link_hash_table *
1600 elf32_cr16_link_hash_table_create (bfd *abfd)
1601 {
1602 struct elf_link_hash_table *ret;
1603 size_t amt = sizeof (struct elf_link_hash_table);
1604
1605 ret = (struct elf_link_hash_table *) bfd_zmalloc (amt);
1606 if (ret == (struct elf_link_hash_table *) NULL)
1607 return NULL;
1608
1609 if (!_bfd_elf_link_hash_table_init (ret, abfd,
1610 elf32_cr16_link_hash_newfunc,
1611 sizeof (struct elf32_cr16_link_hash_entry),
1612 GENERIC_ELF_DATA))
1613 {
1614 free (ret);
1615 return NULL;
1616 }
1617
1618 return &ret->root;
1619 }
1620
1621 static unsigned long
1622 elf_cr16_mach (flagword flags)
1623 {
1624 switch (flags)
1625 {
1626 case EM_CR16:
1627 default:
1628 return bfd_mach_cr16;
1629 }
1630 }
1631
1632 /* The final processing done just before writing out a CR16 ELF object
1633 file. This gets the CR16 architecture right based on the machine
1634 number. */
1635
1636 static bool
1637 _bfd_cr16_elf_final_write_processing (bfd *abfd)
1638 {
1639 unsigned long val;
1640 switch (bfd_get_mach (abfd))
1641 {
1642 default:
1643 case bfd_mach_cr16:
1644 val = EM_CR16;
1645 break;
1646 }
1647 elf_elfheader (abfd)->e_flags |= val;
1648 return _bfd_elf_final_write_processing (abfd);
1649 }
1650
1651
1652 static bool
1653 _bfd_cr16_elf_object_p (bfd *abfd)
1654 {
1655 bfd_default_set_arch_mach (abfd, bfd_arch_cr16,
1656 elf_cr16_mach (elf_elfheader (abfd)->e_flags));
1657 return true;
1658 }
1659
1660 /* Merge backend specific data from an object file to the output
1661 object file when linking. */
1662
1663 static bool
1664 _bfd_cr16_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
1665 {
1666 bfd *obfd = info->output_bfd;
1667
1668 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1669 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1670 return true;
1671
1672 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
1673 && bfd_get_mach (obfd) < bfd_get_mach (ibfd))
1674 {
1675 if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd),
1676 bfd_get_mach (ibfd)))
1677 return false;
1678 }
1679
1680 return true;
1681 }
1682
1683
1684 /* This function handles relaxing for the CR16.
1685
1686 There's quite a few relaxing opportunites available on the CR16:
1687
1688 * bcond:24 -> bcond:16 1 byte
1689 * bcond:16 -> bcond:8 1 byte
1690 * arithmetic imm32 -> arithmetic imm20 12 bits
1691 * arithmetic imm20/imm16 -> arithmetic imm4 12/16 bits
1692
1693 Symbol- and reloc-reading infrastructure copied from elf-m10200.c. */
1694
1695 static bool
1696 elf32_cr16_relax_section (bfd *abfd, asection *sec,
1697 struct bfd_link_info *link_info, bool *again)
1698 {
1699 Elf_Internal_Shdr *symtab_hdr;
1700 Elf_Internal_Rela *internal_relocs;
1701 Elf_Internal_Rela *irel, *irelend;
1702 bfd_byte *contents = NULL;
1703 Elf_Internal_Sym *isymbuf = NULL;
1704
1705 /* Assume nothing changes. */
1706 *again = false;
1707
1708 /* We don't have to do anything for a relocatable link, if
1709 this section does not have relocs, or if this is not a
1710 code section. */
1711 if (bfd_link_relocatable (link_info)
1712 || (sec->flags & SEC_RELOC) == 0
1713 || sec->reloc_count == 0
1714 || (sec->flags & SEC_CODE) == 0)
1715 return true;
1716
1717 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1718
1719 /* Get a copy of the native relocations. */
1720 internal_relocs = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL,
1721 link_info->keep_memory);
1722 if (internal_relocs == NULL)
1723 goto error_return;
1724
1725 /* Walk through them looking for relaxing opportunities. */
1726 irelend = internal_relocs + sec->reloc_count;
1727 for (irel = internal_relocs; irel < irelend; irel++)
1728 {
1729 bfd_vma symval;
1730
1731 /* If this isn't something that can be relaxed, then ignore
1732 this reloc. */
1733 if (ELF32_R_TYPE (irel->r_info) != (int) R_CR16_DISP16
1734 && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_DISP24
1735 && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_IMM32
1736 && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_IMM20
1737 && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_IMM16)
1738 continue;
1739
1740 /* Get the section contents if we haven't done so already. */
1741 if (contents == NULL)
1742 {
1743 /* Get cached copy if it exists. */
1744 if (elf_section_data (sec)->this_hdr.contents != NULL)
1745 contents = elf_section_data (sec)->this_hdr.contents;
1746 /* Go get them off disk. */
1747 else if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1748 goto error_return;
1749 }
1750
1751 /* Read this BFD's local symbols if we haven't done so already. */
1752 if (isymbuf == NULL && symtab_hdr->sh_info != 0)
1753 {
1754 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1755 if (isymbuf == NULL)
1756 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
1757 symtab_hdr->sh_info, 0,
1758 NULL, NULL, NULL);
1759 if (isymbuf == NULL)
1760 goto error_return;
1761 }
1762
1763 /* Get the value of the symbol referred to by the reloc. */
1764 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
1765 {
1766 /* A local symbol. */
1767 Elf_Internal_Sym *isym;
1768 asection *sym_sec;
1769
1770 isym = isymbuf + ELF32_R_SYM (irel->r_info);
1771 if (isym->st_shndx == SHN_UNDEF)
1772 sym_sec = bfd_und_section_ptr;
1773 else if (isym->st_shndx == SHN_ABS)
1774 sym_sec = bfd_abs_section_ptr;
1775 else if (isym->st_shndx == SHN_COMMON)
1776 sym_sec = bfd_com_section_ptr;
1777 else
1778 sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
1779 symval = (isym->st_value
1780 + sym_sec->output_section->vma
1781 + sym_sec->output_offset);
1782 }
1783 else
1784 {
1785 unsigned long indx;
1786 struct elf_link_hash_entry *h;
1787
1788 /* An external symbol. */
1789 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
1790 h = elf_sym_hashes (abfd)[indx];
1791 BFD_ASSERT (h != NULL);
1792
1793 if (h->root.type != bfd_link_hash_defined
1794 && h->root.type != bfd_link_hash_defweak)
1795 /* This appears to be a reference to an undefined
1796 symbol. Just ignore it--it will be caught by the
1797 regular reloc processing. */
1798 continue;
1799
1800 symval = (h->root.u.def.value
1801 + h->root.u.def.section->output_section->vma
1802 + h->root.u.def.section->output_offset);
1803 }
1804
1805 /* For simplicity of coding, we are going to modify the section
1806 contents, the section relocs, and the BFD symbol table. We
1807 must tell the rest of the code not to free up this
1808 information. It would be possible to instead create a table
1809 of changes which have to be made, as is done in coff-mips.c;
1810 that would be more work, but would require less memory when
1811 the linker is run. */
1812
1813 /* Try to turn a 24 branch/call into a 16bit relative
1814 branch/call. */
1815 if (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_DISP24)
1816 {
1817 bfd_vma value = symval;
1818
1819 /* Deal with pc-relative gunk. */
1820 value -= (sec->output_section->vma + sec->output_offset);
1821 value -= irel->r_offset;
1822 value += irel->r_addend;
1823
1824 /* See if the value will fit in 16 bits, note the high value is
1825 0xfffe + 2 as the target will be two bytes closer if we are
1826 able to relax. */
1827 if ((long) value < 0x10000 && (long) value > -0x10002)
1828 {
1829 unsigned int code;
1830
1831 /* Get the opcode. */
1832 code = (unsigned int) bfd_get_32 (abfd,
1833 contents + irel->r_offset);
1834
1835 /* Verify it's a 'bcond' and fix the opcode. */
1836 if ((code & 0xffff) == 0x0010)
1837 bfd_put_16 (abfd, 0x1800 | ((0xf & (code >> 20)) << 4),
1838 contents + irel->r_offset);
1839 else
1840 continue;
1841
1842 /* Note that we've changed the relocs, section contents, etc. */
1843 elf_section_data (sec)->relocs = internal_relocs;
1844 elf_section_data (sec)->this_hdr.contents = contents;
1845 symtab_hdr->contents = (unsigned char *) isymbuf;
1846
1847 /* Fix the relocation's type. */
1848 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1849 R_CR16_DISP16);
1850
1851 /* Delete two bytes of data. */
1852 if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec,
1853 irel->r_offset + 2, 2))
1854 goto error_return;
1855
1856 /* That will change things, so, we should relax again.
1857 Note that this is not required, and it may be slow. */
1858 *again = true;
1859 }
1860 }
1861
1862 /* Try to turn a 16bit pc-relative branch into an
1863 8bit pc-relative branch. */
1864 if (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_DISP16)
1865 {
1866 bfd_vma value = symval;
1867
1868 /* Deal with pc-relative gunk. */
1869 value -= (sec->output_section->vma + sec->output_offset);
1870 value -= irel->r_offset;
1871 value += irel->r_addend;
1872
1873 /* See if the value will fit in 8 bits, note the high value is
1874 0xfc + 2 as the target will be two bytes closer if we are
1875 able to relax. */
1876 /*if ((long) value < 0x1fa && (long) value > -0x100) REVISIT:range */
1877 if ((long) value < 0xfa && (long) value > -0x100)
1878 {
1879 unsigned short code;
1880
1881 /* Get the opcode. */
1882 code = bfd_get_16 (abfd, contents + irel->r_offset);
1883
1884 /* Verify it's a 'bcond' and fix the opcode. */
1885 if ((code & 0xff0f) == 0x1800)
1886 bfd_put_16 (abfd, (code & 0xf0f0), contents + irel->r_offset);
1887 else
1888 continue;
1889
1890 /* Note that we've changed the relocs, section contents, etc. */
1891 elf_section_data (sec)->relocs = internal_relocs;
1892 elf_section_data (sec)->this_hdr.contents = contents;
1893 symtab_hdr->contents = (unsigned char *) isymbuf;
1894
1895 /* Fix the relocation's type. */
1896 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1897 R_CR16_DISP8);
1898
1899 /* Delete two bytes of data. */
1900 if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec,
1901 irel->r_offset + 2, 2))
1902 goto error_return;
1903
1904 /* That will change things, so, we should relax again.
1905 Note that this is not required, and it may be slow. */
1906 *again = true;
1907 }
1908 }
1909
1910 /* Try to turn a 32-bit IMM address into a 20/16-bit IMM address */
1911 if (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_IMM32)
1912 {
1913 bfd_vma value = symval;
1914 unsigned short is_add_mov = 0;
1915 bfd_vma value1 = 0;
1916
1917 /* Get the existing value from the mcode */
1918 value1 = bfd_get_32 (abfd, contents + irel->r_offset + 2);
1919 value1 = (value1 >> 16) | ((value1 & 0xffff) << 16);
1920
1921 /* See if the value will fit in 20 bits. */
1922 if ((long) (value + value1) < 0xfffff && (long) (value + value1) > 0)
1923 {
1924 unsigned short code;
1925
1926 /* Get the opcode. */
1927 code = bfd_get_16 (abfd, contents + irel->r_offset);
1928
1929 /* Verify it's a 'arithmetic ADDD or MOVD instruction'.
1930 For ADDD and MOVD only, convert to IMM32 -> IMM20. */
1931
1932 if (((code & 0xfff0) == 0x0070) || ((code & 0xfff0) == 0x0020))
1933 is_add_mov = 1;
1934
1935 if (is_add_mov)
1936 {
1937 /* Note that we've changed the relocs, section contents,
1938 etc. */
1939 elf_section_data (sec)->relocs = internal_relocs;
1940 elf_section_data (sec)->this_hdr.contents = contents;
1941 symtab_hdr->contents = (unsigned char *) isymbuf;
1942
1943 /* Fix the opcode. */
1944 if ((code & 0xfff0) == 0x0070) /* For movd. */
1945 bfd_put_8 (abfd, 0x05, contents + irel->r_offset + 1);
1946 else /* code == 0x0020 for addd. */
1947 bfd_put_8 (abfd, 0x04, contents + irel->r_offset + 1);
1948
1949 bfd_put_8 (abfd, (code & 0xf) << 4, contents + irel->r_offset);
1950
1951 /* If existing value is nagavive adjust approriately
1952 place the 16-20bits (ie 4 bit) in new opcode,
1953 as the 0xffffxxxx, the higher 2 byte values removed. */
1954 if (value1 & 0x80000000)
1955 bfd_put_8 (abfd,
1956 (0x0f | (bfd_get_8 (abfd,
1957 contents + irel->r_offset))),
1958 contents + irel->r_offset);
1959 else
1960 bfd_put_8 (abfd,
1961 (((value1 >> 16) & 0xf)
1962 | (bfd_get_8 (abfd,
1963 contents + irel->r_offset))),
1964 contents + irel->r_offset);
1965
1966 /* Fix the relocation's type. */
1967 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1968 R_CR16_IMM20);
1969
1970 /* Delete two bytes of data. */
1971 if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec,
1972 irel->r_offset + 2, 2))
1973 goto error_return;
1974
1975 /* That will change things, so, we should relax again.
1976 Note that this is not required, and it may be slow. */
1977 *again = true;
1978 }
1979 }
1980
1981 /* See if the value will fit in 16 bits. */
1982 if ((!is_add_mov)
1983 && ((long)(value + value1) < 0x7fff && (long)(value + value1) > 0))
1984 {
1985 unsigned short code;
1986
1987 /* Get the opcode. */
1988 code = bfd_get_16 (abfd, contents + irel->r_offset);
1989
1990 /* Note that we've changed the relocs, section contents, etc. */
1991 elf_section_data (sec)->relocs = internal_relocs;
1992 elf_section_data (sec)->this_hdr.contents = contents;
1993 symtab_hdr->contents = (unsigned char *) isymbuf;
1994
1995 /* Fix the opcode. */
1996 if ((code & 0xf0) == 0x70) /* For movd. */
1997 bfd_put_8 (abfd, 0x54, contents + irel->r_offset + 1);
1998 else if ((code & 0xf0) == 0x20) /* For addd. */
1999 bfd_put_8 (abfd, 0x60, contents + irel->r_offset + 1);
2000 else if ((code & 0xf0) == 0x90) /* For cmpd. */
2001 bfd_put_8 (abfd, 0x56, contents + irel->r_offset + 1);
2002 else
2003 continue;
2004
2005 bfd_put_8 (abfd, 0xb0 | (code & 0xf), contents + irel->r_offset);
2006
2007 /* If existing value is nagavive adjust approriately
2008 place the 12-16bits (ie 4 bit) in new opcode,
2009 as the 0xfffffxxx, the higher 2 byte values removed. */
2010 if (value1 & 0x80000000)
2011 bfd_put_8 (abfd,
2012 (0x0f | (bfd_get_8 (abfd,
2013 contents + irel->r_offset))),
2014 contents + irel->r_offset);
2015 else
2016 bfd_put_16 (abfd, value1, contents + irel->r_offset + 2);
2017
2018
2019 /* Fix the relocation's type. */
2020 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2021 R_CR16_IMM16);
2022
2023 /* Delete two bytes of data. */
2024 if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec,
2025 irel->r_offset + 2, 2))
2026 goto error_return;
2027
2028 /* That will change things, so, we should relax again.
2029 Note that this is not required, and it may be slow. */
2030 *again = true;
2031 }
2032 }
2033
2034 #if 0
2035 /* Try to turn a 16bit immediate address into a 4bit
2036 immediate address. */
2037 if ((ELF32_R_TYPE (irel->r_info) == (int) R_CR16_IMM20)
2038 || (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_IMM16))
2039 {
2040 bfd_vma value = symval;
2041 bfd_vma value1 = 0;
2042
2043 /* Get the existing value from the mcode */
2044 value1 = ((bfd_get_16 (abfd, contents + irel->r_offset + 2) & 0xffff));
2045
2046 if (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_IMM20)
2047 {
2048 value1 |= ((bfd_get_16 (abfd, contents + irel->r_offset + 1)
2049 & 0xf000) << 0x4);
2050 }
2051
2052 /* See if the value will fit in 4 bits. */
2053 if ((((long) (value + value1)) < 0xf)
2054 && (((long) (value + value1)) > 0))
2055 {
2056 unsigned short code;
2057
2058 /* Get the opcode. */
2059 code = bfd_get_16 (abfd, contents + irel->r_offset);
2060
2061 /* Note that we've changed the relocs, section contents, etc. */
2062 elf_section_data (sec)->relocs = internal_relocs;
2063 elf_section_data (sec)->this_hdr.contents = contents;
2064 symtab_hdr->contents = (unsigned char *) isymbuf;
2065
2066 /* Fix the opcode. */
2067 if (((code & 0x0f00) == 0x0400) || ((code & 0x0f00) == 0x0500))
2068 {
2069 if ((code & 0x0f00) == 0x0400) /* For movd imm20. */
2070 bfd_put_8 (abfd, 0x60, contents + irel->r_offset);
2071 else /* For addd imm20. */
2072 bfd_put_8 (abfd, 0x54, contents + irel->r_offset);
2073 bfd_put_8 (abfd, (code & 0xf0) >> 4,
2074 contents + irel->r_offset + 1);
2075 }
2076 else
2077 {
2078 if ((code & 0xfff0) == 0x56b0) /* For cmpd imm16. */
2079 bfd_put_8 (abfd, 0x56, contents + irel->r_offset);
2080 else if ((code & 0xfff0) == 0x54b0) /* For movd imm16. */
2081 bfd_put_8 (abfd, 0x54, contents + irel->r_offset);
2082 else if ((code & 0xfff0) == 0x58b0) /* For movb imm16. */
2083 bfd_put_8 (abfd, 0x58, contents + irel->r_offset);
2084 else if ((code & 0xfff0) == 0x5Ab0) /* For movw imm16. */
2085 bfd_put_8 (abfd, 0x5A, contents + irel->r_offset);
2086 else if ((code & 0xfff0) == 0x60b0) /* For addd imm16. */
2087 bfd_put_8 (abfd, 0x60, contents + irel->r_offset);
2088 else if ((code & 0xfff0) == 0x30b0) /* For addb imm16. */
2089 bfd_put_8 (abfd, 0x30, contents + irel->r_offset);
2090 else if ((code & 0xfff0) == 0x2Cb0) /* For addub imm16. */
2091 bfd_put_8 (abfd, 0x2C, contents + irel->r_offset);
2092 else if ((code & 0xfff0) == 0x32b0) /* For adduw imm16. */
2093 bfd_put_8 (abfd, 0x32, contents + irel->r_offset);
2094 else if ((code & 0xfff0) == 0x38b0) /* For subb imm16. */
2095 bfd_put_8 (abfd, 0x38, contents + irel->r_offset);
2096 else if ((code & 0xfff0) == 0x3Cb0) /* For subcb imm16. */
2097 bfd_put_8 (abfd, 0x3C, contents + irel->r_offset);
2098 else if ((code & 0xfff0) == 0x3Fb0) /* For subcw imm16. */
2099 bfd_put_8 (abfd, 0x3F, contents + irel->r_offset);
2100 else if ((code & 0xfff0) == 0x3Ab0) /* For subw imm16. */
2101 bfd_put_8 (abfd, 0x3A, contents + irel->r_offset);
2102 else if ((code & 0xfff0) == 0x50b0) /* For cmpb imm16. */
2103 bfd_put_8 (abfd, 0x50, contents + irel->r_offset);
2104 else if ((code & 0xfff0) == 0x52b0) /* For cmpw imm16. */
2105 bfd_put_8 (abfd, 0x52, contents + irel->r_offset);
2106 else
2107 continue;
2108
2109 bfd_put_8 (abfd, (code & 0xf), contents + irel->r_offset + 1);
2110 }
2111
2112 /* Fix the relocation's type. */
2113 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2114 R_CR16_IMM4);
2115
2116 /* Delete two bytes of data. */
2117 if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec,
2118 irel->r_offset + 2, 2))
2119 goto error_return;
2120
2121 /* That will change things, so, we should relax again.
2122 Note that this is not required, and it may be slow. */
2123 *again = true;
2124 }
2125 }
2126 #endif
2127 }
2128
2129 if (isymbuf != NULL
2130 && symtab_hdr->contents != (unsigned char *) isymbuf)
2131 {
2132 if (! link_info->keep_memory)
2133 free (isymbuf);
2134 else
2135 /* Cache the symbols for elf_link_input_bfd. */
2136 symtab_hdr->contents = (unsigned char *) isymbuf;
2137 }
2138
2139 if (contents != NULL
2140 && elf_section_data (sec)->this_hdr.contents != contents)
2141 {
2142 if (! link_info->keep_memory)
2143 free (contents);
2144 else
2145 /* Cache the section contents for elf_link_input_bfd. */
2146 elf_section_data (sec)->this_hdr.contents = contents;
2147
2148 }
2149
2150 if (elf_section_data (sec)->relocs != internal_relocs)
2151 free (internal_relocs);
2152
2153 return true;
2154
2155 error_return:
2156 if (symtab_hdr->contents != (unsigned char *) isymbuf)
2157 free (isymbuf);
2158 if (elf_section_data (sec)->this_hdr.contents != contents)
2159 free (contents);
2160 if (elf_section_data (sec)->relocs != internal_relocs)
2161 free (internal_relocs);
2162
2163 return false;
2164 }
2165
2166 static asection *
2167 elf32_cr16_gc_mark_hook (asection *sec,
2168 struct bfd_link_info *info,
2169 Elf_Internal_Rela *rel,
2170 struct elf_link_hash_entry *h,
2171 Elf_Internal_Sym *sym)
2172 {
2173 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
2174 }
2175
2176 /* Create dynamic sections when linking against a dynamic object. */
2177
2178 static bool
2179 _bfd_cr16_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2180 {
2181 flagword flags;
2182 asection * s;
2183 const struct elf_backend_data * bed = get_elf_backend_data (abfd);
2184 struct elf_link_hash_table *htab = elf_hash_table (info);
2185 int ptralign = 0;
2186
2187 switch (bed->s->arch_size)
2188 {
2189 case 16:
2190 ptralign = 1;
2191 break;
2192
2193 case 32:
2194 ptralign = 2;
2195 break;
2196
2197 default:
2198 bfd_set_error (bfd_error_bad_value);
2199 return false;
2200 }
2201
2202 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
2203 .rel[a].bss sections. */
2204
2205 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2206 | SEC_LINKER_CREATED);
2207
2208 s = bfd_make_section_anyway_with_flags (abfd,
2209 (bed->default_use_rela_p
2210 ? ".rela.plt" : ".rel.plt"),
2211 flags | SEC_READONLY);
2212 htab->srelplt = s;
2213 if (s == NULL
2214 || !bfd_set_section_alignment (s, ptralign))
2215 return false;
2216
2217 if (! _bfd_cr16_elf_create_got_section (abfd, info))
2218 return false;
2219
2220 if (bed->want_dynbss)
2221 {
2222 /* The .dynbss section is a place to put symbols which are defined
2223 by dynamic objects, are referenced by regular objects, and are
2224 not functions. We must allocate space for them in the process
2225 image and use a R_*_COPY reloc to tell the dynamic linker to
2226 initialize them at run time. The linker script puts the .dynbss
2227 section into the .bss section of the final image. */
2228 s = bfd_make_section_anyway_with_flags (abfd, ".dynbss",
2229 SEC_ALLOC | SEC_LINKER_CREATED);
2230 if (s == NULL)
2231 return false;
2232
2233 /* The .rel[a].bss section holds copy relocs. This section is not
2234 normally needed. We need to create it here, though, so that the
2235 linker will map it to an output section. We can't just create it
2236 only if we need it, because we will not know whether we need it
2237 until we have seen all the input files, and the first time the
2238 main linker code calls BFD after examining all the input files
2239 (size_dynamic_sections) the input sections have already been
2240 mapped to the output sections. If the section turns out not to
2241 be needed, we can discard it later. We will never need this
2242 section when generating a shared object, since they do not use
2243 copy relocs. */
2244 if (! bfd_link_executable (info))
2245 {
2246 s = bfd_make_section_anyway_with_flags (abfd,
2247 (bed->default_use_rela_p
2248 ? ".rela.bss" : ".rel.bss"),
2249 flags | SEC_READONLY);
2250 if (s == NULL
2251 || !bfd_set_section_alignment (s, ptralign))
2252 return false;
2253 }
2254 }
2255
2256 return true;
2257 }
2258 \f
2259 /* Adjust a symbol defined by a dynamic object and referenced by a
2260 regular object. The current definition is in some section of the
2261 dynamic object, but we're not including those sections. We have to
2262 change the definition to something the rest of the link can
2263 understand. */
2264
2265 static bool
2266 _bfd_cr16_elf_adjust_dynamic_symbol (struct bfd_link_info * info,
2267 struct elf_link_hash_entry * h)
2268 {
2269 bfd * dynobj;
2270 asection * s;
2271
2272 dynobj = elf_hash_table (info)->dynobj;
2273
2274 /* Make sure we know what is going on here. */
2275 BFD_ASSERT (dynobj != NULL
2276 && (h->needs_plt
2277 || h->is_weakalias
2278 || (h->def_dynamic
2279 && h->ref_regular
2280 && !h->def_regular)));
2281
2282 /* If this is a function, put it in the procedure linkage table. We
2283 will fill in the contents of the procedure linkage table later,
2284 when we know the address of the .got section. */
2285 if (h->type == STT_FUNC
2286 || h->needs_plt)
2287 {
2288 if (! bfd_link_executable (info)
2289 && !h->def_dynamic
2290 && !h->ref_dynamic)
2291 {
2292 /* This case can occur if we saw a PLT reloc in an input
2293 file, but the symbol was never referred to by a dynamic
2294 object. In such a case, we don't actually need to build
2295 a procedure linkage table, and we can just do a REL32
2296 reloc instead. */
2297 BFD_ASSERT (h->needs_plt);
2298 return true;
2299 }
2300
2301 /* Make sure this symbol is output as a dynamic symbol. */
2302 if (h->dynindx == -1)
2303 {
2304 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2305 return false;
2306 }
2307
2308 /* We also need to make an entry in the .got.plt section, which
2309 will be placed in the .got section by the linker script. */
2310
2311 s = elf_hash_table (info)->sgotplt;
2312 BFD_ASSERT (s != NULL);
2313 s->size += 4;
2314
2315 /* We also need to make an entry in the .rela.plt section. */
2316
2317 s = elf_hash_table (info)->srelplt;
2318 BFD_ASSERT (s != NULL);
2319 s->size += sizeof (Elf32_External_Rela);
2320
2321 return true;
2322 }
2323
2324 /* If this is a weak symbol, and there is a real definition, the
2325 processor independent code will have arranged for us to see the
2326 real definition first, and we can just use the same value. */
2327 if (h->is_weakalias)
2328 {
2329 struct elf_link_hash_entry *def = weakdef (h);
2330 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
2331 h->root.u.def.section = def->root.u.def.section;
2332 h->root.u.def.value = def->root.u.def.value;
2333 return true;
2334 }
2335
2336 /* This is a reference to a symbol defined by a dynamic object which
2337 is not a function. */
2338
2339 /* If we are creating a shared library, we must presume that the
2340 only references to the symbol are via the global offset table.
2341 For such cases we need not do anything here; the relocations will
2342 be handled correctly by relocate_section. */
2343 if (bfd_link_executable (info))
2344 return true;
2345
2346 /* If there are no references to this symbol that do not use the
2347 GOT, we don't need to generate a copy reloc. */
2348 if (!h->non_got_ref)
2349 return true;
2350
2351 /* We must allocate the symbol in our .dynbss section, which will
2352 become part of the .bss section of the executable. There will be
2353 an entry for this symbol in the .dynsym section. The dynamic
2354 object will contain position independent code, so all references
2355 from the dynamic object to this symbol will go through the global
2356 offset table. The dynamic linker will use the .dynsym entry to
2357 determine the address it must put in the global offset table, so
2358 both the dynamic object and the regular object will refer to the
2359 same memory location for the variable. */
2360
2361 s = bfd_get_linker_section (dynobj, ".dynbss");
2362 BFD_ASSERT (s != NULL);
2363
2364 /* We must generate a R_CR16_COPY reloc to tell the dynamic linker to
2365 copy the initial value out of the dynamic object and into the
2366 runtime process image. We need to remember the offset into the
2367 .rela.bss section we are going to use. */
2368 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
2369 {
2370 asection * srel;
2371
2372 srel = bfd_get_linker_section (dynobj, ".rela.bss");
2373 BFD_ASSERT (srel != NULL);
2374 srel->size += sizeof (Elf32_External_Rela);
2375 h->needs_copy = 1;
2376 }
2377
2378 return _bfd_elf_adjust_dynamic_copy (info, h, s);
2379 }
2380
2381 /* Set the sizes of the dynamic sections. */
2382
2383 static bool
2384 _bfd_cr16_elf_size_dynamic_sections (bfd * output_bfd,
2385 struct bfd_link_info * info)
2386 {
2387 bfd * dynobj;
2388 asection * s;
2389 bool relocs;
2390
2391 dynobj = elf_hash_table (info)->dynobj;
2392 BFD_ASSERT (dynobj != NULL);
2393
2394 if (elf_hash_table (info)->dynamic_sections_created)
2395 {
2396 /* Set the contents of the .interp section to the interpreter. */
2397 if (bfd_link_executable (info) && !info->nointerp)
2398 {
2399 #if 0
2400 s = bfd_get_linker_section (dynobj, ".interp");
2401 BFD_ASSERT (s != NULL);
2402 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2403 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2404 #endif
2405 }
2406 }
2407 else
2408 {
2409 /* We may have created entries in the .rela.got section.
2410 However, if we are not creating the dynamic sections, we will
2411 not actually use these entries. Reset the size of .rela.got,
2412 which will cause it to get stripped from the output file
2413 below. */
2414 s = elf_hash_table (info)->srelgot;
2415 if (s != NULL)
2416 s->size = 0;
2417 }
2418
2419 /* The check_relocs and adjust_dynamic_symbol entry points have
2420 determined the sizes of the various dynamic sections. Allocate
2421 memory for them. */
2422 relocs = false;
2423 for (s = dynobj->sections; s != NULL; s = s->next)
2424 {
2425 const char * name;
2426
2427 if ((s->flags & SEC_LINKER_CREATED) == 0)
2428 continue;
2429
2430 /* It's OK to base decisions on the section name, because none
2431 of the dynobj section names depend upon the input files. */
2432 name = bfd_section_name (s);
2433
2434 if (strcmp (name, ".plt") == 0)
2435 {
2436 /* Remember whether there is a PLT. */
2437 ;
2438 }
2439 else if (startswith (name, ".rela"))
2440 {
2441 if (s->size != 0)
2442 {
2443 /* Remember whether there are any reloc sections other
2444 than .rela.plt. */
2445 if (strcmp (name, ".rela.plt") != 0)
2446 relocs = true;
2447
2448 /* We use the reloc_count field as a counter if we need
2449 to copy relocs into the output file. */
2450 s->reloc_count = 0;
2451 }
2452 }
2453 else if (! startswith (name, ".got")
2454 && strcmp (name, ".dynbss") != 0)
2455 /* It's not one of our sections, so don't allocate space. */
2456 continue;
2457
2458 if (s->size == 0)
2459 {
2460 /* If we don't need this section, strip it from the
2461 output file. This is mostly to handle .rela.bss and
2462 .rela.plt. We must create both sections in
2463 create_dynamic_sections, because they must be created
2464 before the linker maps input sections to output
2465 sections. The linker does that before
2466 adjust_dynamic_symbol is called, and it is that
2467 function which decides whether anything needs to go
2468 into these sections. */
2469 s->flags |= SEC_EXCLUDE;
2470 continue;
2471 }
2472
2473 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2474 continue;
2475
2476 /* Allocate memory for the section contents. We use bfd_zalloc
2477 here in case unused entries are not reclaimed before the
2478 section's contents are written out. This should not happen,
2479 but this way if it does, we get a R_CR16_NONE reloc
2480 instead of garbage. */
2481 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2482 if (s->contents == NULL)
2483 return false;
2484 }
2485
2486 return _bfd_elf_add_dynamic_tags (output_bfd, info, relocs);
2487 }
2488
2489 /* Finish up dynamic symbol handling. We set the contents of various
2490 dynamic sections here. */
2491
2492 static bool
2493 _bfd_cr16_elf_finish_dynamic_symbol (bfd * output_bfd,
2494 struct bfd_link_info * info,
2495 struct elf_link_hash_entry * h,
2496 Elf_Internal_Sym * sym)
2497 {
2498 bfd * dynobj;
2499
2500 dynobj = elf_hash_table (info)->dynobj;
2501
2502 if (h->got.offset != (bfd_vma) -1)
2503 {
2504 asection * sgot;
2505 asection * srel;
2506 Elf_Internal_Rela rel;
2507
2508 /* This symbol has an entry in the global offset table. Set it up. */
2509
2510 sgot = elf_hash_table (info)->sgot;
2511 srel = elf_hash_table (info)->srelgot;
2512 BFD_ASSERT (sgot != NULL && srel != NULL);
2513
2514 rel.r_offset = (sgot->output_section->vma
2515 + sgot->output_offset
2516 + (h->got.offset & ~1));
2517
2518 /* If this is a -Bsymbolic link, and the symbol is defined
2519 locally, we just want to emit a RELATIVE reloc. Likewise if
2520 the symbol was forced to be local because of a version file.
2521 The entry in the global offset table will already have been
2522 initialized in the relocate_section function. */
2523 if (bfd_link_executable (info)
2524 && (info->symbolic || h->dynindx == -1)
2525 && h->def_regular)
2526 {
2527 rel.r_info = ELF32_R_INFO (0, R_CR16_GOT_REGREL20);
2528 rel.r_addend = (h->root.u.def.value
2529 + h->root.u.def.section->output_section->vma
2530 + h->root.u.def.section->output_offset);
2531 }
2532 else
2533 {
2534 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
2535 rel.r_info = ELF32_R_INFO (h->dynindx, R_CR16_GOT_REGREL20);
2536 rel.r_addend = 0;
2537 }
2538
2539 bfd_elf32_swap_reloca_out (output_bfd, &rel,
2540 (bfd_byte *) ((Elf32_External_Rela *) srel->contents
2541 + srel->reloc_count));
2542 ++ srel->reloc_count;
2543 }
2544
2545 if (h->needs_copy)
2546 {
2547 asection * s;
2548 Elf_Internal_Rela rel;
2549
2550 /* This symbol needs a copy reloc. Set it up. */
2551 BFD_ASSERT (h->dynindx != -1
2552 && (h->root.type == bfd_link_hash_defined
2553 || h->root.type == bfd_link_hash_defweak));
2554
2555 s = bfd_get_linker_section (dynobj, ".rela.bss");
2556 BFD_ASSERT (s != NULL);
2557
2558 rel.r_offset = (h->root.u.def.value
2559 + h->root.u.def.section->output_section->vma
2560 + h->root.u.def.section->output_offset);
2561 rel.r_info = ELF32_R_INFO (h->dynindx, R_CR16_GOT_REGREL20);
2562 rel.r_addend = 0;
2563 bfd_elf32_swap_reloca_out (output_bfd, &rel,
2564 (bfd_byte *) ((Elf32_External_Rela *) s->contents
2565 + s->reloc_count));
2566 ++ s->reloc_count;
2567 }
2568
2569 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
2570 if (h == elf_hash_table (info)->hdynamic
2571 || h == elf_hash_table (info)->hgot)
2572 sym->st_shndx = SHN_ABS;
2573
2574 return true;
2575 }
2576
2577 /* Finish up the dynamic sections. */
2578
2579 static bool
2580 _bfd_cr16_elf_finish_dynamic_sections (bfd * output_bfd,
2581 struct bfd_link_info * info)
2582 {
2583 bfd * dynobj;
2584 asection * sgot;
2585 asection * sdyn;
2586
2587 dynobj = elf_hash_table (info)->dynobj;
2588
2589 sgot = elf_hash_table (info)->sgotplt;
2590 BFD_ASSERT (sgot != NULL);
2591 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
2592
2593 if (elf_hash_table (info)->dynamic_sections_created)
2594 {
2595 Elf32_External_Dyn * dyncon;
2596 Elf32_External_Dyn * dynconend;
2597
2598 BFD_ASSERT (sdyn != NULL);
2599
2600 dyncon = (Elf32_External_Dyn *) sdyn->contents;
2601 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
2602
2603 for (; dyncon < dynconend; dyncon++)
2604 {
2605 Elf_Internal_Dyn dyn;
2606 asection * s;
2607
2608 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
2609
2610 switch (dyn.d_tag)
2611 {
2612 default:
2613 break;
2614
2615 case DT_PLTGOT:
2616 s = elf_hash_table (info)->sgotplt;
2617 goto get_vma;
2618
2619 case DT_JMPREL:
2620 s = elf_hash_table (info)->srelplt;
2621 get_vma:
2622 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
2623 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2624 break;
2625
2626 case DT_PLTRELSZ:
2627 s = elf_hash_table (info)->srelplt;
2628 dyn.d_un.d_val = s->size;
2629 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2630 break;
2631 }
2632 }
2633
2634 }
2635
2636 /* Fill in the first three entries in the global offset table. */
2637 if (sgot->size > 0)
2638 {
2639 if (sdyn == NULL)
2640 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
2641 else
2642 bfd_put_32 (output_bfd,
2643 sdyn->output_section->vma + sdyn->output_offset,
2644 sgot->contents);
2645 }
2646
2647 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
2648
2649 return true;
2650 }
2651
2652 /* Given a .data.rel section and a .emreloc in-memory section, store
2653 relocation information into the .emreloc section which can be
2654 used at runtime to relocate the section. This is called by the
2655 linker when the --embedded-relocs switch is used. This is called
2656 after the add_symbols entry point has been called for all the
2657 objects, and before the final_link entry point is called. */
2658
2659 bool
2660 bfd_cr16_elf32_create_embedded_relocs (bfd *abfd,
2661 struct bfd_link_info *info,
2662 asection *datasec,
2663 asection *relsec,
2664 char **errmsg)
2665 {
2666 Elf_Internal_Shdr *symtab_hdr;
2667 Elf_Internal_Sym *isymbuf = NULL;
2668 Elf_Internal_Rela *internal_relocs = NULL;
2669 Elf_Internal_Rela *irel, *irelend;
2670 bfd_byte *p;
2671 bfd_size_type amt;
2672
2673 BFD_ASSERT (! bfd_link_relocatable (info));
2674
2675 *errmsg = NULL;
2676
2677 if (datasec->reloc_count == 0)
2678 return true;
2679
2680 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2681
2682 /* Get a copy of the native relocations. */
2683 internal_relocs = (_bfd_elf_link_read_relocs
2684 (abfd, datasec, NULL, NULL, info->keep_memory));
2685 if (internal_relocs == NULL)
2686 goto error_return;
2687
2688 amt = (bfd_size_type) datasec->reloc_count * 8;
2689 relsec->contents = (bfd_byte *) bfd_alloc (abfd, amt);
2690 if (relsec->contents == NULL)
2691 goto error_return;
2692
2693 p = relsec->contents;
2694
2695 irelend = internal_relocs + datasec->reloc_count;
2696 for (irel = internal_relocs; irel < irelend; irel++, p += 8)
2697 {
2698 asection *targetsec;
2699
2700 /* We are going to write a four byte longword into the runtime
2701 reloc section. The longword will be the address in the data
2702 section which must be relocated. It is followed by the name
2703 of the target section NUL-padded or truncated to 8
2704 characters. */
2705
2706 /* We can only relocate absolute longword relocs at run time. */
2707 if (!((ELF32_R_TYPE (irel->r_info) == (int) R_CR16_NUM32a)
2708 || (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_NUM32)))
2709 {
2710 *errmsg = _("unsupported relocation type");
2711 bfd_set_error (bfd_error_bad_value);
2712 goto error_return;
2713 }
2714
2715 /* Get the target section referred to by the reloc. */
2716 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
2717 {
2718 /* A local symbol. */
2719 Elf_Internal_Sym *isym;
2720
2721 /* Read this BFD's local symbols if we haven't done so already. */
2722 if (isymbuf == NULL)
2723 {
2724 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
2725 if (isymbuf == NULL)
2726 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
2727 symtab_hdr->sh_info, 0,
2728 NULL, NULL, NULL);
2729 if (isymbuf == NULL)
2730 goto error_return;
2731 }
2732
2733 isym = isymbuf + ELF32_R_SYM (irel->r_info);
2734 targetsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
2735 }
2736 else
2737 {
2738 unsigned long indx;
2739 struct elf_link_hash_entry *h;
2740
2741 /* An external symbol. */
2742 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
2743 h = elf_sym_hashes (abfd)[indx];
2744 BFD_ASSERT (h != NULL);
2745 if (h->root.type == bfd_link_hash_defined
2746 || h->root.type == bfd_link_hash_defweak)
2747 targetsec = h->root.u.def.section;
2748 else
2749 targetsec = NULL;
2750 }
2751
2752 bfd_put_32 (abfd, irel->r_offset + datasec->output_offset, p);
2753 memset (p + 4, 0, 4);
2754 if ((ELF32_R_TYPE (irel->r_info) == (int) R_CR16_NUM32a)
2755 && (targetsec != NULL) )
2756 strncpy ((char *) p + 4, targetsec->output_section->name, 4);
2757 }
2758
2759 if (symtab_hdr->contents != (unsigned char *) isymbuf)
2760 free (isymbuf);
2761 if (elf_section_data (datasec)->relocs != internal_relocs)
2762 free (internal_relocs);
2763 return true;
2764
2765 error_return:
2766 if (symtab_hdr->contents != (unsigned char *) isymbuf)
2767 free (isymbuf);
2768 if (elf_section_data (datasec)->relocs != internal_relocs)
2769 free (internal_relocs);
2770 return false;
2771 }
2772
2773
2774 /* Classify relocation types, such that combreloc can sort them
2775 properly. */
2776
2777 static enum elf_reloc_type_class
2778 _bfd_cr16_elf_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
2779 const asection *rel_sec ATTRIBUTE_UNUSED,
2780 const Elf_Internal_Rela *rela)
2781 {
2782 switch ((int) ELF32_R_TYPE (rela->r_info))
2783 {
2784 case R_CR16_GOT_REGREL20:
2785 case R_CR16_GOTC_REGREL20:
2786 return reloc_class_relative;
2787 default:
2788 return reloc_class_normal;
2789 }
2790 }
2791
2792 /* Definitions for setting CR16 target vector. */
2793 #define TARGET_LITTLE_SYM cr16_elf32_vec
2794 #define TARGET_LITTLE_NAME "elf32-cr16"
2795 #define ELF_ARCH bfd_arch_cr16
2796 #define ELF_MACHINE_CODE EM_CR16
2797 #define ELF_MACHINE_ALT1 EM_CR16_OLD
2798 #define ELF_MAXPAGESIZE 0x1
2799 #define elf_symbol_leading_char '_'
2800
2801 #define bfd_elf32_bfd_reloc_type_lookup elf_cr16_reloc_type_lookup
2802 #define bfd_elf32_bfd_reloc_name_lookup elf_cr16_reloc_name_lookup
2803 #define elf_info_to_howto elf_cr16_info_to_howto
2804 #define elf_info_to_howto_rel NULL
2805 #define elf_backend_relocate_section elf32_cr16_relocate_section
2806 #define bfd_elf32_bfd_relax_section elf32_cr16_relax_section
2807 #define bfd_elf32_bfd_get_relocated_section_contents \
2808 elf32_cr16_get_relocated_section_contents
2809 #define elf_backend_gc_mark_hook elf32_cr16_gc_mark_hook
2810 #define elf_backend_can_gc_sections 1
2811 #define elf_backend_rela_normal 1
2812 #define elf_backend_check_relocs cr16_elf_check_relocs
2813 /* So we can set bits in e_flags. */
2814 #define elf_backend_final_write_processing \
2815 _bfd_cr16_elf_final_write_processing
2816 #define elf_backend_object_p _bfd_cr16_elf_object_p
2817
2818 #define bfd_elf32_bfd_merge_private_bfd_data \
2819 _bfd_cr16_elf_merge_private_bfd_data
2820
2821
2822 #define bfd_elf32_bfd_link_hash_table_create \
2823 elf32_cr16_link_hash_table_create
2824
2825 #define elf_backend_create_dynamic_sections \
2826 _bfd_cr16_elf_create_dynamic_sections
2827 #define elf_backend_adjust_dynamic_symbol \
2828 _bfd_cr16_elf_adjust_dynamic_symbol
2829 #define elf_backend_size_dynamic_sections \
2830 _bfd_cr16_elf_size_dynamic_sections
2831 #define elf_backend_omit_section_dynsym _bfd_elf_omit_section_dynsym_all
2832 #define elf_backend_finish_dynamic_symbol \
2833 _bfd_cr16_elf_finish_dynamic_symbol
2834 #define elf_backend_finish_dynamic_sections \
2835 _bfd_cr16_elf_finish_dynamic_sections
2836
2837 #define elf_backend_reloc_type_class _bfd_cr16_elf_reloc_type_class
2838
2839
2840 #define elf_backend_want_got_plt 1
2841 #define elf_backend_plt_readonly 1
2842 #define elf_backend_want_plt_sym 0
2843 #define elf_backend_got_header_size 12
2844 #define elf_backend_dtrel_excludes_plt 1
2845
2846 #include "elf32-target.h"