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[binutils-gdb.git] / bfd / elf32-cr16.c
1 /* BFD back-end for National Semiconductor's CR16 ELF
2 Copyright 2007, 2008, 2009, 2010, 2012 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
29 /* The cr16 linker needs to keep track of the number of relocs that
30 it decides to copy in check_relocs for each symbol. This is so
31 that it can discard PC relative relocs if it doesn't need them when
32 linking with -Bsymbolic. We store the information in a field
33 extending the regular ELF linker hash table. */
34
35 struct elf32_cr16_link_hash_entry
36 {
37 /* The basic elf link hash table entry. */
38 struct elf_link_hash_entry root;
39
40 /* For function symbols, the number of times this function is
41 called directly (ie by name). */
42 unsigned int direct_calls;
43
44 /* For function symbols, the size of this function's stack
45 (if <= 255 bytes). We stuff this into "call" instructions
46 to this target when it's valid and profitable to do so.
47
48 This does not include stack allocated by movm! */
49 unsigned char stack_size;
50
51 /* For function symbols, arguments (if any) for movm instruction
52 in the prologue. We stuff this value into "call" instructions
53 to the target when it's valid and profitable to do so. */
54 unsigned char movm_args;
55
56 /* For function symbols, the amount of stack space that would be allocated
57 by the movm instruction. This is redundant with movm_args, but we
58 add it to the hash table to avoid computing it over and over. */
59 unsigned char movm_stack_size;
60
61 /* Used to mark functions which have had redundant parts of their
62 prologue deleted. */
63 #define CR16_DELETED_PROLOGUE_BYTES 0x1
64 unsigned char flags;
65
66 /* Calculated value. */
67 bfd_vma value;
68 };
69
70 /* cr16_reloc_map array maps BFD relocation enum into a CRGAS relocation type. */
71
72 struct cr16_reloc_map
73 {
74 bfd_reloc_code_real_type bfd_reloc_enum; /* BFD relocation enum. */
75 unsigned short cr16_reloc_type; /* CR16 relocation type. */
76 };
77
78 static const struct cr16_reloc_map cr16_reloc_map[R_CR16_MAX] =
79 {
80 {BFD_RELOC_NONE, R_CR16_NONE},
81 {BFD_RELOC_CR16_NUM8, R_CR16_NUM8},
82 {BFD_RELOC_CR16_NUM16, R_CR16_NUM16},
83 {BFD_RELOC_CR16_NUM32, R_CR16_NUM32},
84 {BFD_RELOC_CR16_NUM32a, R_CR16_NUM32a},
85 {BFD_RELOC_CR16_REGREL4, R_CR16_REGREL4},
86 {BFD_RELOC_CR16_REGREL4a, R_CR16_REGREL4a},
87 {BFD_RELOC_CR16_REGREL14, R_CR16_REGREL14},
88 {BFD_RELOC_CR16_REGREL14a, R_CR16_REGREL14a},
89 {BFD_RELOC_CR16_REGREL16, R_CR16_REGREL16},
90 {BFD_RELOC_CR16_REGREL20, R_CR16_REGREL20},
91 {BFD_RELOC_CR16_REGREL20a, R_CR16_REGREL20a},
92 {BFD_RELOC_CR16_ABS20, R_CR16_ABS20},
93 {BFD_RELOC_CR16_ABS24, R_CR16_ABS24},
94 {BFD_RELOC_CR16_IMM4, R_CR16_IMM4},
95 {BFD_RELOC_CR16_IMM8, R_CR16_IMM8},
96 {BFD_RELOC_CR16_IMM16, R_CR16_IMM16},
97 {BFD_RELOC_CR16_IMM20, R_CR16_IMM20},
98 {BFD_RELOC_CR16_IMM24, R_CR16_IMM24},
99 {BFD_RELOC_CR16_IMM32, R_CR16_IMM32},
100 {BFD_RELOC_CR16_IMM32a, R_CR16_IMM32a},
101 {BFD_RELOC_CR16_DISP4, R_CR16_DISP4},
102 {BFD_RELOC_CR16_DISP8, R_CR16_DISP8},
103 {BFD_RELOC_CR16_DISP16, R_CR16_DISP16},
104 {BFD_RELOC_CR16_DISP24, R_CR16_DISP24},
105 {BFD_RELOC_CR16_DISP24a, R_CR16_DISP24a},
106 {BFD_RELOC_CR16_SWITCH8, R_CR16_SWITCH8},
107 {BFD_RELOC_CR16_SWITCH16, R_CR16_SWITCH16},
108 {BFD_RELOC_CR16_SWITCH32, R_CR16_SWITCH32},
109 {BFD_RELOC_CR16_GOT_REGREL20, R_CR16_GOT_REGREL20},
110 {BFD_RELOC_CR16_GOTC_REGREL20, R_CR16_GOTC_REGREL20},
111 {BFD_RELOC_CR16_GLOB_DAT, R_CR16_GLOB_DAT}
112 };
113
114 static reloc_howto_type cr16_elf_howto_table[] =
115 {
116 HOWTO (R_CR16_NONE, /* type */
117 0, /* rightshift */
118 2, /* size */
119 32, /* bitsize */
120 FALSE, /* pc_relative */
121 0, /* bitpos */
122 complain_overflow_dont, /* complain_on_overflow */
123 bfd_elf_generic_reloc, /* special_function */
124 "R_CR16_NONE", /* name */
125 FALSE, /* partial_inplace */
126 0, /* src_mask */
127 0, /* dst_mask */
128 FALSE), /* pcrel_offset */
129
130 HOWTO (R_CR16_NUM8, /* type */
131 0, /* rightshift */
132 0, /* size */
133 8, /* bitsize */
134 FALSE, /* pc_relative */
135 0, /* bitpos */
136 complain_overflow_bitfield,/* complain_on_overflow */
137 bfd_elf_generic_reloc, /* special_function */
138 "R_CR16_NUM8", /* name */
139 FALSE, /* partial_inplace */
140 0x0, /* src_mask */
141 0xff, /* dst_mask */
142 FALSE), /* pcrel_offset */
143
144 HOWTO (R_CR16_NUM16, /* type */
145 0, /* rightshift */
146 1, /* size */
147 16, /* bitsize */
148 FALSE, /* pc_relative */
149 0, /* bitpos */
150 complain_overflow_bitfield,/* complain_on_overflow */
151 bfd_elf_generic_reloc, /* special_function */
152 "R_CR16_NUM16", /* name */
153 FALSE, /* partial_inplace */
154 0x0, /* src_mask */
155 0xffff, /* dst_mask */
156 FALSE), /* pcrel_offset */
157
158 HOWTO (R_CR16_NUM32, /* type */
159 0, /* rightshift */
160 2, /* size */
161 32, /* bitsize */
162 FALSE, /* pc_relative */
163 0, /* bitpos */
164 complain_overflow_bitfield,/* complain_on_overflow */
165 bfd_elf_generic_reloc, /* special_function */
166 "R_CR16_NUM32", /* name */
167 FALSE, /* partial_inplace */
168 0x0, /* src_mask */
169 0xffffffff, /* dst_mask */
170 FALSE), /* pcrel_offset */
171
172 HOWTO (R_CR16_NUM32a, /* type */
173 1, /* rightshift */
174 2, /* size */
175 32, /* bitsize */
176 FALSE, /* pc_relative */
177 0, /* bitpos */
178 complain_overflow_bitfield,/* complain_on_overflow */
179 bfd_elf_generic_reloc, /* special_function */
180 "R_CR16_NUM32a", /* name */
181 FALSE, /* partial_inplace */
182 0x0, /* src_mask */
183 0xffffffff, /* dst_mask */
184 FALSE), /* pcrel_offset */
185
186 HOWTO (R_CR16_REGREL4, /* type */
187 0, /* rightshift */
188 0, /* size */
189 4, /* bitsize */
190 FALSE, /* pc_relative */
191 0, /* bitpos */
192 complain_overflow_bitfield,/* complain_on_overflow */
193 bfd_elf_generic_reloc, /* special_function */
194 "R_CR16_REGREL4", /* name */
195 FALSE, /* partial_inplace */
196 0x0, /* src_mask */
197 0xf, /* dst_mask */
198 FALSE), /* pcrel_offset */
199
200 HOWTO (R_CR16_REGREL4a, /* type */
201 0, /* rightshift */
202 0, /* size */
203 4, /* bitsize */
204 FALSE, /* pc_relative */
205 0, /* bitpos */
206 complain_overflow_bitfield,/* complain_on_overflow */
207 bfd_elf_generic_reloc, /* special_function */
208 "R_CR16_REGREL4a", /* name */
209 FALSE, /* partial_inplace */
210 0x0, /* src_mask */
211 0xf, /* dst_mask */
212 FALSE), /* pcrel_offset */
213
214 HOWTO (R_CR16_REGREL14, /* type */
215 0, /* rightshift */
216 1, /* size */
217 14, /* bitsize */
218 FALSE, /* pc_relative */
219 0, /* bitpos */
220 complain_overflow_bitfield,/* complain_on_overflow */
221 bfd_elf_generic_reloc, /* special_function */
222 "R_CR16_REGREL14", /* name */
223 FALSE, /* partial_inplace */
224 0x0, /* src_mask */
225 0x3fff, /* dst_mask */
226 FALSE), /* pcrel_offset */
227
228 HOWTO (R_CR16_REGREL14a, /* type */
229 0, /* rightshift */
230 1, /* size */
231 14, /* bitsize */
232 FALSE, /* pc_relative */
233 0, /* bitpos */
234 complain_overflow_bitfield,/* complain_on_overflow */
235 bfd_elf_generic_reloc, /* special_function */
236 "R_CR16_REGREL14a", /* name */
237 FALSE, /* partial_inplace */
238 0x0, /* src_mask */
239 0x3fff, /* dst_mask */
240 FALSE), /* pcrel_offset */
241
242 HOWTO (R_CR16_REGREL16, /* type */
243 0, /* rightshift */
244 1, /* size */
245 16, /* bitsize */
246 FALSE, /* pc_relative */
247 0, /* bitpos */
248 complain_overflow_bitfield,/* complain_on_overflow */
249 bfd_elf_generic_reloc, /* special_function */
250 "R_CR16_REGREL16", /* name */
251 FALSE, /* partial_inplace */
252 0x0, /* src_mask */
253 0xffff, /* dst_mask */
254 FALSE), /* pcrel_offset */
255
256 HOWTO (R_CR16_REGREL20, /* type */
257 0, /* rightshift */
258 2, /* size */
259 20, /* bitsize */
260 FALSE, /* pc_relative */
261 0, /* bitpos */
262 complain_overflow_bitfield,/* complain_on_overflow */
263 bfd_elf_generic_reloc, /* special_function */
264 "R_CR16_REGREL20", /* name */
265 FALSE, /* partial_inplace */
266 0x0, /* src_mask */
267 0xfffff, /* dst_mask */
268 FALSE), /* pcrel_offset */
269
270 HOWTO (R_CR16_REGREL20a, /* type */
271 0, /* rightshift */
272 2, /* size */
273 20, /* bitsize */
274 FALSE, /* pc_relative */
275 0, /* bitpos */
276 complain_overflow_bitfield,/* complain_on_overflow */
277 bfd_elf_generic_reloc, /* special_function */
278 "R_CR16_REGREL20a", /* name */
279 FALSE, /* partial_inplace */
280 0x0, /* src_mask */
281 0xfffff, /* dst_mask */
282 FALSE), /* pcrel_offset */
283
284 HOWTO (R_CR16_ABS20, /* type */
285 0, /* rightshift */
286 2, /* size */
287 20, /* bitsize */
288 FALSE, /* pc_relative */
289 0, /* bitpos */
290 complain_overflow_bitfield,/* complain_on_overflow */
291 bfd_elf_generic_reloc, /* special_function */
292 "R_CR16_ABS20", /* name */
293 FALSE, /* partial_inplace */
294 0x0, /* src_mask */
295 0xfffff, /* dst_mask */
296 FALSE), /* pcrel_offset */
297
298 HOWTO (R_CR16_ABS24, /* type */
299 0, /* rightshift */
300 2, /* size */
301 24, /* bitsize */
302 FALSE, /* pc_relative */
303 0, /* bitpos */
304 complain_overflow_bitfield,/* complain_on_overflow */
305 bfd_elf_generic_reloc, /* special_function */
306 "R_CR16_ABS24", /* name */
307 FALSE, /* partial_inplace */
308 0x0, /* src_mask */
309 0xffffff, /* dst_mask */
310 FALSE), /* pcrel_offset */
311
312 HOWTO (R_CR16_IMM4, /* type */
313 0, /* rightshift */
314 0, /* size */
315 4, /* bitsize */
316 FALSE, /* pc_relative */
317 0, /* bitpos */
318 complain_overflow_bitfield,/* complain_on_overflow */
319 bfd_elf_generic_reloc, /* special_function */
320 "R_CR16_IMM4", /* name */
321 FALSE, /* partial_inplace */
322 0x0, /* src_mask */
323 0xf, /* dst_mask */
324 FALSE), /* pcrel_offset */
325
326 HOWTO (R_CR16_IMM8, /* type */
327 0, /* rightshift */
328 0, /* size */
329 8, /* bitsize */
330 FALSE, /* pc_relative */
331 0, /* bitpos */
332 complain_overflow_bitfield,/* complain_on_overflow */
333 bfd_elf_generic_reloc, /* special_function */
334 "R_CR16_IMM8", /* name */
335 FALSE, /* partial_inplace */
336 0x0, /* src_mask */
337 0xff, /* dst_mask */
338 FALSE), /* pcrel_offset */
339
340 HOWTO (R_CR16_IMM16, /* type */
341 0, /* rightshift */
342 1, /* size */
343 16, /* bitsize */
344 FALSE, /* pc_relative */
345 0, /* bitpos */
346 complain_overflow_bitfield,/* complain_on_overflow */
347 bfd_elf_generic_reloc, /* special_function */
348 "R_CR16_IMM16", /* name */
349 FALSE, /* partial_inplace */
350 0x0, /* src_mask */
351 0xffff, /* dst_mask */
352 FALSE), /* pcrel_offset */
353
354 HOWTO (R_CR16_IMM20, /* type */
355 0, /* rightshift */
356 2, /* size */
357 20, /* bitsize */
358 FALSE, /* pc_relative */
359 0, /* bitpos */
360 complain_overflow_bitfield,/* complain_on_overflow */
361 bfd_elf_generic_reloc, /* special_function */
362 "R_CR16_IMM20", /* name */
363 FALSE, /* partial_inplace */
364 0x0, /* src_mask */
365 0xfffff, /* dst_mask */
366 FALSE), /* pcrel_offset */
367
368 HOWTO (R_CR16_IMM24, /* type */
369 0, /* rightshift */
370 2, /* size */
371 24, /* bitsize */
372 FALSE, /* pc_relative */
373 0, /* bitpos */
374 complain_overflow_bitfield,/* complain_on_overflow */
375 bfd_elf_generic_reloc, /* special_function */
376 "R_CR16_IMM24", /* name */
377 FALSE, /* partial_inplace */
378 0x0, /* src_mask */
379 0xffffff, /* dst_mask */
380 FALSE), /* pcrel_offset */
381
382 HOWTO (R_CR16_IMM32, /* type */
383 0, /* rightshift */
384 2, /* size */
385 32, /* bitsize */
386 FALSE, /* pc_relative */
387 0, /* bitpos */
388 complain_overflow_bitfield,/* complain_on_overflow */
389 bfd_elf_generic_reloc, /* special_function */
390 "R_CR16_IMM32", /* name */
391 FALSE, /* partial_inplace */
392 0x0, /* src_mask */
393 0xffffffff, /* dst_mask */
394 FALSE), /* pcrel_offset */
395
396 HOWTO (R_CR16_IMM32a, /* type */
397 1, /* rightshift */
398 2, /* size */
399 32, /* bitsize */
400 FALSE, /* pc_relative */
401 0, /* bitpos */
402 complain_overflow_bitfield,/* complain_on_overflow */
403 bfd_elf_generic_reloc, /* special_function */
404 "R_CR16_IMM32a", /* name */
405 FALSE, /* partial_inplace */
406 0x0, /* src_mask */
407 0xffffffff, /* dst_mask */
408 FALSE), /* pcrel_offset */
409
410 HOWTO (R_CR16_DISP4, /* type */
411 1, /* rightshift */
412 0, /* size (0 = byte, 1 = short, 2 = long) */
413 4, /* bitsize */
414 TRUE, /* pc_relative */
415 0, /* bitpos */
416 complain_overflow_unsigned, /* complain_on_overflow */
417 bfd_elf_generic_reloc, /* special_function */
418 "R_CR16_DISP4", /* name */
419 FALSE, /* partial_inplace */
420 0x0, /* src_mask */
421 0xf, /* dst_mask */
422 FALSE), /* pcrel_offset */
423
424 HOWTO (R_CR16_DISP8, /* type */
425 1, /* rightshift */
426 0, /* size (0 = byte, 1 = short, 2 = long) */
427 8, /* bitsize */
428 TRUE, /* pc_relative */
429 0, /* bitpos */
430 complain_overflow_unsigned, /* complain_on_overflow */
431 bfd_elf_generic_reloc, /* special_function */
432 "R_CR16_DISP8", /* name */
433 FALSE, /* partial_inplace */
434 0x0, /* src_mask */
435 0x1ff, /* dst_mask */
436 FALSE), /* pcrel_offset */
437
438 HOWTO (R_CR16_DISP16, /* type */
439 0, /* rightshift REVIITS: To sync with WinIDEA*/
440 1, /* size (0 = byte, 1 = short, 2 = long) */
441 16, /* bitsize */
442 TRUE, /* pc_relative */
443 0, /* bitpos */
444 complain_overflow_unsigned, /* complain_on_overflow */
445 bfd_elf_generic_reloc, /* special_function */
446 "R_CR16_DISP16", /* name */
447 FALSE, /* partial_inplace */
448 0x0, /* src_mask */
449 0x1ffff, /* dst_mask */
450 FALSE), /* pcrel_offset */
451 /* REVISIT: DISP24 should be left-shift by 2 as per ISA doc
452 but its not done, to sync with WinIDEA and CR16 4.1 tools */
453 HOWTO (R_CR16_DISP24, /* type */
454 0, /* rightshift */
455 2, /* size (0 = byte, 1 = short, 2 = long) */
456 24, /* bitsize */
457 TRUE, /* pc_relative */
458 0, /* bitpos */
459 complain_overflow_unsigned, /* complain_on_overflow */
460 bfd_elf_generic_reloc, /* special_function */
461 "R_CR16_DISP24", /* name */
462 FALSE, /* partial_inplace */
463 0x0, /* src_mask */
464 0x1ffffff, /* dst_mask */
465 FALSE), /* pcrel_offset */
466
467 HOWTO (R_CR16_DISP24a, /* type */
468 0, /* rightshift */
469 2, /* size (0 = byte, 1 = short, 2 = long) */
470 24, /* bitsize */
471 TRUE, /* pc_relative */
472 0, /* bitpos */
473 complain_overflow_unsigned, /* complain_on_overflow */
474 bfd_elf_generic_reloc, /* special_function */
475 "R_CR16_DISP24a", /* name */
476 FALSE, /* partial_inplace */
477 0x0, /* src_mask */
478 0xffffff, /* dst_mask */
479 FALSE), /* pcrel_offset */
480
481 /* An 8 bit switch table entry. This is generated for an expression
482 such as ``.byte L1 - L2''. The offset holds the difference
483 between the reloc address and L2. */
484 HOWTO (R_CR16_SWITCH8, /* type */
485 0, /* rightshift */
486 0, /* size (0 = byte, 1 = short, 2 = long) */
487 8, /* bitsize */
488 FALSE, /* pc_relative */
489 0, /* bitpos */
490 complain_overflow_unsigned, /* complain_on_overflow */
491 bfd_elf_generic_reloc, /* special_function */
492 "R_CR16_SWITCH8", /* name */
493 FALSE, /* partial_inplace */
494 0x0, /* src_mask */
495 0xff, /* dst_mask */
496 TRUE), /* pcrel_offset */
497
498 /* A 16 bit switch table entry. This is generated for an expression
499 such as ``.word L1 - L2''. The offset holds the difference
500 between the reloc address and L2. */
501 HOWTO (R_CR16_SWITCH16, /* type */
502 0, /* rightshift */
503 1, /* size (0 = byte, 1 = short, 2 = long) */
504 16, /* bitsize */
505 FALSE, /* pc_relative */
506 0, /* bitpos */
507 complain_overflow_unsigned, /* complain_on_overflow */
508 bfd_elf_generic_reloc, /* special_function */
509 "R_CR16_SWITCH16", /* name */
510 FALSE, /* partial_inplace */
511 0x0, /* src_mask */
512 0xffff, /* dst_mask */
513 TRUE), /* pcrel_offset */
514
515 /* A 32 bit switch table entry. This is generated for an expression
516 such as ``.long L1 - L2''. The offset holds the difference
517 between the reloc address and L2. */
518 HOWTO (R_CR16_SWITCH32, /* type */
519 0, /* rightshift */
520 2, /* size (0 = byte, 1 = short, 2 = long) */
521 32, /* bitsize */
522 FALSE, /* pc_relative */
523 0, /* bitpos */
524 complain_overflow_unsigned, /* complain_on_overflow */
525 bfd_elf_generic_reloc, /* special_function */
526 "R_CR16_SWITCH32", /* name */
527 FALSE, /* partial_inplace */
528 0x0, /* src_mask */
529 0xffffffff, /* dst_mask */
530 TRUE), /* pcrel_offset */
531
532 HOWTO (R_CR16_GOT_REGREL20, /* type */
533 0, /* rightshift */
534 2, /* size */
535 20, /* bitsize */
536 FALSE, /* pc_relative */
537 0, /* bitpos */
538 complain_overflow_bitfield,/* complain_on_overflow */
539 bfd_elf_generic_reloc, /* special_function */
540 "R_CR16_GOT_REGREL20", /* name */
541 TRUE, /* partial_inplace */
542 0x0, /* src_mask */
543 0xfffff, /* dst_mask */
544 FALSE), /* pcrel_offset */
545
546 HOWTO (R_CR16_GOTC_REGREL20, /* type */
547 0, /* rightshift */
548 2, /* size */
549 20, /* bitsize */
550 FALSE, /* pc_relative */
551 0, /* bitpos */
552 complain_overflow_bitfield,/* complain_on_overflow */
553 bfd_elf_generic_reloc, /* special_function */
554 "R_CR16_GOTC_REGREL20", /* name */
555 TRUE, /* partial_inplace */
556 0x0, /* src_mask */
557 0xfffff, /* dst_mask */
558 FALSE), /* pcrel_offset */
559
560 HOWTO (R_CR16_GLOB_DAT, /* type */
561 0, /* rightshift */
562 2, /* size (0 = byte, 1 = short, 2 = long) */
563 32, /* bitsize */
564 FALSE, /* pc_relative */
565 0, /* bitpos */
566 complain_overflow_unsigned, /* complain_on_overflow */
567 bfd_elf_generic_reloc, /* special_function */
568 "R_CR16_GLOB_DAT", /* name */
569 FALSE, /* partial_inplace */
570 0x0, /* src_mask */
571 0xffffffff, /* dst_mask */
572 TRUE) /* pcrel_offset */
573 };
574
575
576 /* Create the GOT section. */
577
578 static bfd_boolean
579 _bfd_cr16_elf_create_got_section (bfd * abfd, struct bfd_link_info * info)
580 {
581 flagword flags;
582 asection * s;
583 struct elf_link_hash_entry * h;
584 const struct elf_backend_data * bed = get_elf_backend_data (abfd);
585 int ptralign;
586
587 /* This function may be called more than once. */
588 if (bfd_get_linker_section (abfd, ".got") != NULL)
589 return TRUE;
590
591 switch (bed->s->arch_size)
592 {
593 case 16:
594 ptralign = 1;
595 break;
596
597 case 32:
598 ptralign = 2;
599 break;
600
601 default:
602 bfd_set_error (bfd_error_bad_value);
603 return FALSE;
604 }
605
606 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
607 | SEC_LINKER_CREATED);
608
609 s = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
610 if (s == NULL
611 || ! bfd_set_section_alignment (abfd, s, ptralign))
612 return FALSE;
613
614 if (bed->want_got_plt)
615 {
616 s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags);
617 if (s == NULL
618 || ! bfd_set_section_alignment (abfd, s, ptralign))
619 return FALSE;
620 }
621
622 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
623 (or .got.plt) section. We don't do this in the linker script
624 because we don't want to define the symbol if we are not creating
625 a global offset table. */
626 h = _bfd_elf_define_linkage_sym (abfd, info, s, "_GLOBAL_OFFSET_TABLE_");
627 elf_hash_table (info)->hgot = h;
628 if (h == NULL)
629 return FALSE;
630
631 /* The first bit of the global offset table is the header. */
632 s->size += bed->got_header_size;
633
634 return TRUE;
635 }
636
637
638 /* Retrieve a howto ptr using a BFD reloc_code. */
639
640 static reloc_howto_type *
641 elf_cr16_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
642 bfd_reloc_code_real_type code)
643 {
644 unsigned int i;
645
646 for (i = 0; i < R_CR16_MAX; i++)
647 if (code == cr16_reloc_map[i].bfd_reloc_enum)
648 return &cr16_elf_howto_table[cr16_reloc_map[i].cr16_reloc_type];
649
650 _bfd_error_handler ("Unsupported CR16 relocation type: 0x%x\n", code);
651 return NULL;
652 }
653
654 static reloc_howto_type *
655 elf_cr16_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
656 const char *r_name)
657 {
658 unsigned int i;
659
660 for (i = 0; ARRAY_SIZE (cr16_elf_howto_table); i++)
661 if (cr16_elf_howto_table[i].name != NULL
662 && strcasecmp (cr16_elf_howto_table[i].name, r_name) == 0)
663 return cr16_elf_howto_table + i;
664
665 return NULL;
666 }
667
668 /* Retrieve a howto ptr using an internal relocation entry. */
669
670 static void
671 elf_cr16_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
672 Elf_Internal_Rela *dst)
673 {
674 unsigned int r_type = ELF32_R_TYPE (dst->r_info);
675
676 BFD_ASSERT (r_type < (unsigned int) R_CR16_MAX);
677 cache_ptr->howto = cr16_elf_howto_table + r_type;
678 }
679
680 /* Look through the relocs for a section during the first phase.
681 Since we don't do .gots or .plts, we just need to consider the
682 virtual table relocs for gc. */
683
684 static bfd_boolean
685 cr16_elf_check_relocs (bfd *abfd, struct bfd_link_info *info, asection *sec,
686 const Elf_Internal_Rela *relocs)
687 {
688 Elf_Internal_Shdr *symtab_hdr;
689 Elf_Internal_Sym * isymbuf = NULL;
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
698 sgot = NULL;
699 srelgot = NULL;
700 bfd_boolean result = FALSE;
701
702 if (info->relocatable)
703 return TRUE;
704
705 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
706 sym_hashes = elf_sym_hashes (abfd);
707 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym);
708 if (!elf_bad_symtab (abfd))
709 sym_hashes_end -= symtab_hdr->sh_info;
710
711 dynobj = elf_hash_table (info)->dynobj;
712 local_got_offsets = elf_local_got_offsets (abfd);
713 rel_end = relocs + sec->reloc_count;
714 for (rel = relocs; rel < rel_end; rel++)
715 {
716 struct elf_link_hash_entry *h;
717 unsigned long r_symndx;
718
719 r_symndx = ELF32_R_SYM (rel->r_info);
720 if (r_symndx < symtab_hdr->sh_info)
721 h = NULL;
722 else
723 {
724 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
725 while (h->root.type == bfd_link_hash_indirect
726 || h->root.type == bfd_link_hash_warning)
727 h = (struct elf_link_hash_entry *) h->root.u.i.link;
728 }
729
730 /* Some relocs require a global offset table. */
731 if (dynobj == NULL)
732 {
733 switch (ELF32_R_TYPE (rel->r_info))
734 {
735 case R_CR16_GOT_REGREL20:
736 case R_CR16_GOTC_REGREL20:
737 elf_hash_table (info)->dynobj = dynobj = abfd;
738 if (! _bfd_cr16_elf_create_got_section (dynobj, info))
739 goto fail;
740 break;
741
742 default:
743 break;
744 }
745 }
746
747 switch (ELF32_R_TYPE (rel->r_info))
748 {
749 case R_CR16_GOT_REGREL20:
750 case R_CR16_GOTC_REGREL20:
751 /* This symbol requires a global offset table entry. */
752
753 if (sgot == NULL)
754 {
755 sgot = bfd_get_linker_section (dynobj, ".got");
756 BFD_ASSERT (sgot != NULL);
757 }
758
759 if (srelgot == NULL
760 && (h != NULL || info->executable))
761 {
762 srelgot = bfd_get_linker_section (dynobj, ".rela.got");
763 if (srelgot == NULL)
764 {
765 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
766 | SEC_IN_MEMORY | SEC_LINKER_CREATED
767 | SEC_READONLY);
768 srelgot = bfd_make_section_anyway_with_flags (dynobj,
769 ".rela.got",
770 flags);
771 if (srelgot == NULL
772 || ! bfd_set_section_alignment (dynobj, srelgot, 2))
773 goto fail;
774 }
775 }
776
777 if (h != NULL)
778 {
779 if (h->got.offset != (bfd_vma) -1)
780 /* We have already allocated space in the .got. */
781 break;
782
783 h->got.offset = sgot->size;
784
785 /* Make sure this symbol is output as a dynamic symbol. */
786 if (h->dynindx == -1)
787 {
788 if (! bfd_elf_link_record_dynamic_symbol (info, h))
789 goto fail;
790 }
791
792 srelgot->size += sizeof (Elf32_External_Rela);
793 }
794 else
795 {
796 /* This is a global offset table entry for a local
797 symbol. */
798 if (local_got_offsets == NULL)
799 {
800 size_t size;
801 unsigned int i;
802
803 size = symtab_hdr->sh_info * sizeof (bfd_vma);
804 local_got_offsets = (bfd_vma *) bfd_alloc (abfd, size);
805
806 if (local_got_offsets == NULL)
807 goto fail;
808
809 elf_local_got_offsets (abfd) = local_got_offsets;
810
811 for (i = 0; i < symtab_hdr->sh_info; i++)
812 local_got_offsets[i] = (bfd_vma) -1;
813 }
814
815 if (local_got_offsets[r_symndx] != (bfd_vma) -1)
816 /* We have already allocated space in the .got. */
817 break;
818
819 local_got_offsets[r_symndx] = sgot->size;
820
821 if (info->executable)
822 /* If we are generating a shared object, we need to
823 output a R_CR16_RELATIVE reloc so that the dynamic
824 linker can adjust this GOT entry. */
825 srelgot->size += sizeof (Elf32_External_Rela);
826 }
827
828 sgot->size += 4;
829 break;
830
831 }
832 }
833
834 result = TRUE;
835 fail:
836 if (isymbuf != NULL)
837 free (isymbuf);
838
839 return result;
840 }
841
842 /* Perform a relocation as part of a final link. */
843
844 static bfd_reloc_status_type
845 cr16_elf_final_link_relocate (reloc_howto_type *howto,
846 bfd *input_bfd,
847 bfd *output_bfd ATTRIBUTE_UNUSED,
848 asection *input_section,
849 bfd_byte *contents,
850 bfd_vma offset,
851 bfd_vma Rvalue,
852 bfd_vma addend,
853 struct elf_link_hash_entry * h,
854 unsigned long symndx ATTRIBUTE_UNUSED,
855 struct bfd_link_info *info ATTRIBUTE_UNUSED,
856 asection *sec ATTRIBUTE_UNUSED,
857 int is_local ATTRIBUTE_UNUSED)
858 {
859 unsigned short r_type = howto->type;
860 bfd_byte *hit_data = contents + offset;
861 bfd_vma reloc_bits, check, Rvalue1;
862 bfd * dynobj;
863
864 dynobj = elf_hash_table (info)->dynobj;
865
866 switch (r_type)
867 {
868 case R_CR16_IMM4:
869 case R_CR16_IMM20:
870 case R_CR16_ABS20:
871 break;
872
873 case R_CR16_IMM8:
874 case R_CR16_IMM16:
875 case R_CR16_IMM32:
876 case R_CR16_IMM32a:
877 case R_CR16_REGREL4:
878 case R_CR16_REGREL4a:
879 case R_CR16_REGREL14:
880 case R_CR16_REGREL14a:
881 case R_CR16_REGREL16:
882 case R_CR16_REGREL20:
883 case R_CR16_REGREL20a:
884 case R_CR16_GOT_REGREL20:
885 case R_CR16_GOTC_REGREL20:
886 case R_CR16_ABS24:
887 case R_CR16_DISP16:
888 case R_CR16_DISP24:
889 /* 'hit_data' is relative to the start of the instruction, not the
890 relocation offset. Advance it to account for the exact offset. */
891 hit_data += 2;
892 break;
893
894 case R_CR16_NONE:
895 return bfd_reloc_ok;
896 break;
897
898 case R_CR16_DISP4:
899 if (is_local)
900 Rvalue += -1;
901 break;
902
903 case R_CR16_DISP8:
904 case R_CR16_DISP24a:
905 if (is_local)
906 Rvalue -= -1;
907 break;
908
909 case R_CR16_SWITCH8:
910 case R_CR16_SWITCH16:
911 case R_CR16_SWITCH32:
912 /* We only care about the addend, where the difference between
913 expressions is kept. */
914 Rvalue = 0;
915
916 default:
917 break;
918 }
919
920 if (howto->pc_relative)
921 {
922 /* Subtract the address of the section containing the location. */
923 Rvalue -= (input_section->output_section->vma
924 + input_section->output_offset);
925 /* Subtract the position of the location within the section. */
926 Rvalue -= offset;
927 }
928
929 /* Add in supplied addend. */
930 Rvalue += addend;
931
932 /* Complain if the bitfield overflows, whether it is considered
933 as signed or unsigned. */
934 check = Rvalue >> howto->rightshift;
935
936 /* Assumes two's complement. This expression avoids
937 overflow if howto->bitsize is the number of bits in
938 bfd_vma. */
939 reloc_bits = (((1 << (howto->bitsize - 1)) - 1) << 1) | 1;
940
941 /* For GOT and GOTC relocs no boundary checks applied. */
942 if (!((r_type == R_CR16_GOT_REGREL20)
943 || (r_type == R_CR16_GOTC_REGREL20)))
944 {
945 if (((bfd_vma) check & ~reloc_bits) != 0
946 && (((bfd_vma) check & ~reloc_bits)
947 != (-(bfd_vma) 1 & ~reloc_bits)))
948 {
949 /* The above right shift is incorrect for a signed
950 value. See if turning on the upper bits fixes the
951 overflow. */
952 if (howto->rightshift && (bfd_signed_vma) Rvalue < 0)
953 {
954 check |= ((bfd_vma) - 1
955 & ~((bfd_vma) - 1
956 >> howto->rightshift));
957
958 if (((bfd_vma) check & ~reloc_bits)
959 != (-(bfd_vma) 1 & ~reloc_bits))
960 return bfd_reloc_overflow;
961 }
962 else
963 return bfd_reloc_overflow;
964 }
965
966 /* Drop unwanted bits from the value we are relocating to. */
967 Rvalue >>= (bfd_vma) howto->rightshift;
968
969 /* Apply dst_mask to select only relocatable part of the insn. */
970 Rvalue &= howto->dst_mask;
971 }
972
973 switch (howto->size)
974 {
975 case 0:
976 if (r_type == R_CR16_DISP8)
977 {
978 Rvalue1 = bfd_get_16 (input_bfd, hit_data);
979 Rvalue = ((Rvalue1 & 0xf000) | ((Rvalue << 4) & 0xf00)
980 | (Rvalue1 & 0x00f0) | (Rvalue & 0xf));
981 bfd_put_16 (input_bfd, Rvalue, hit_data);
982 }
983 else if (r_type == R_CR16_IMM4)
984 {
985 Rvalue1 = bfd_get_16 (input_bfd, hit_data);
986 Rvalue = (((Rvalue1 & 0xff) << 8) | ((Rvalue << 4) & 0xf0)
987 | ((Rvalue1 & 0x0f00) >> 8));
988 bfd_put_16 (input_bfd, Rvalue, hit_data);
989 }
990 else if (r_type == R_CR16_DISP4)
991 {
992 Rvalue1 = bfd_get_16 (input_bfd, hit_data);
993 Rvalue = (Rvalue1 | ((Rvalue & 0xf) << 4));
994 bfd_put_16 (input_bfd, Rvalue, hit_data);
995 }
996 else
997 {
998 bfd_put_8 (input_bfd, (unsigned char) Rvalue, hit_data);
999 }
1000 break;
1001
1002 case 1:
1003 if (r_type == R_CR16_DISP16)
1004 {
1005 Rvalue |= (bfd_get_16 (input_bfd, hit_data));
1006 Rvalue = ((Rvalue & 0xfffe) | ((Rvalue >> 16) & 0x1));
1007 }
1008 if (r_type == R_CR16_IMM16)
1009 {
1010 Rvalue1 = bfd_get_16 (input_bfd, hit_data);
1011
1012 /* Add or subtract the offset value. */
1013 if (Rvalue1 & 0x8000)
1014 Rvalue -= (~Rvalue1 + 1) & 0xffff;
1015 else
1016 Rvalue += Rvalue1;
1017
1018 /* Check for range. */
1019 if ((long) Rvalue > 0xffff || (long) Rvalue < 0x0)
1020 return bfd_reloc_overflow;
1021 }
1022
1023 bfd_put_16 (input_bfd, Rvalue, hit_data);
1024 break;
1025
1026 case 2:
1027 if ((r_type == R_CR16_ABS20) || (r_type == R_CR16_IMM20))
1028 {
1029 Rvalue1 = (bfd_get_16 (input_bfd, hit_data + 2)
1030 | (((bfd_get_16 (input_bfd, hit_data) & 0xf) <<16)));
1031
1032 /* Add or subtract the offset value. */
1033 if (Rvalue1 & 0x80000)
1034 Rvalue -= (~Rvalue1 + 1) & 0xfffff;
1035 else
1036 Rvalue += Rvalue1;
1037
1038 /* Check for range. */
1039 if ((long) Rvalue > 0xfffff || (long) Rvalue < 0x0)
1040 return bfd_reloc_overflow;
1041
1042 bfd_put_16 (input_bfd, ((bfd_get_16 (input_bfd, hit_data) & 0xfff0)
1043 | ((Rvalue >> 16) & 0xf)), hit_data);
1044 bfd_put_16 (input_bfd, (Rvalue) & 0xffff, hit_data + 2);
1045 }
1046 else if (r_type == R_CR16_GOT_REGREL20)
1047 {
1048 asection * sgot = bfd_get_linker_section (dynobj, ".got");
1049
1050 if (h != NULL)
1051 {
1052 bfd_vma off;
1053
1054 off = h->got.offset;
1055 BFD_ASSERT (off != (bfd_vma) -1);
1056
1057 if (! elf_hash_table (info)->dynamic_sections_created
1058 || SYMBOL_REFERENCES_LOCAL (info, h))
1059 /* This is actually a static link, or it is a
1060 -Bsymbolic link and the symbol is defined
1061 locally, or the symbol was forced to be local
1062 because of a version file. We must initialize
1063 this entry in the global offset table.
1064 When doing a dynamic link, we create a .rela.got
1065 relocation entry to initialize the value. This
1066 is done in the finish_dynamic_symbol routine. */
1067 bfd_put_32 (output_bfd, Rvalue, sgot->contents + off);
1068
1069 Rvalue = sgot->output_offset + off;
1070 }
1071 else
1072 {
1073 bfd_vma off;
1074
1075 off = elf_local_got_offsets (input_bfd)[symndx];
1076 bfd_put_32 (output_bfd,Rvalue, sgot->contents + off);
1077
1078 Rvalue = sgot->output_offset + off;
1079 }
1080
1081 Rvalue += addend;
1082
1083 /* REVISIT: if ((long) Rvalue > 0xffffff ||
1084 (long) Rvalue < -0x800000). */
1085 if ((long) Rvalue > 0xffffff || (long) Rvalue < 0)
1086 return bfd_reloc_overflow;
1087
1088
1089 bfd_put_16 (input_bfd, (bfd_get_16 (input_bfd, hit_data))
1090 | (((Rvalue >> 16) & 0xf) << 8), hit_data);
1091 bfd_put_16 (input_bfd, (Rvalue) & 0xffff, hit_data + 2);
1092
1093 }
1094 else if (r_type == R_CR16_GOTC_REGREL20)
1095 {
1096 asection * sgot;
1097 sgot = bfd_get_linker_section (dynobj, ".got");
1098
1099 if (h != NULL)
1100 {
1101 bfd_vma off;
1102
1103 off = h->got.offset;
1104 BFD_ASSERT (off != (bfd_vma) -1);
1105
1106 Rvalue >>=1; /* For code symbols. */
1107
1108 if (! elf_hash_table (info)->dynamic_sections_created
1109 || SYMBOL_REFERENCES_LOCAL (info, h))
1110 /* This is actually a static link, or it is a
1111 -Bsymbolic link and the symbol is defined
1112 locally, or the symbol was forced to be local
1113 because of a version file. We must initialize
1114 this entry in the global offset table.
1115 When doing a dynamic link, we create a .rela.got
1116 relocation entry to initialize the value. This
1117 is done in the finish_dynamic_symbol routine. */
1118 bfd_put_32 (output_bfd, Rvalue, sgot->contents + off);
1119
1120 Rvalue = sgot->output_offset + off;
1121 }
1122 else
1123 {
1124 bfd_vma off;
1125
1126 off = elf_local_got_offsets (input_bfd)[symndx];
1127 Rvalue >>= 1;
1128 bfd_put_32 (output_bfd,Rvalue, sgot->contents + off);
1129 Rvalue = sgot->output_offset + off;
1130 }
1131
1132 Rvalue += addend;
1133
1134 /* Check if any value in DISP. */
1135 Rvalue1 =((bfd_get_32 (input_bfd, hit_data) >>16)
1136 | (((bfd_get_32 (input_bfd, hit_data) & 0xfff) >> 8) <<16));
1137
1138 /* Add or subtract the offset value. */
1139 if (Rvalue1 & 0x80000)
1140 Rvalue -= (~Rvalue1 + 1) & 0xfffff;
1141 else
1142 Rvalue += Rvalue1;
1143
1144 /* Check for range. */
1145 /* REVISIT: if ((long) Rvalue > 0xffffff
1146 || (long) Rvalue < -0x800000). */
1147 if ((long) Rvalue > 0xffffff || (long) Rvalue < 0)
1148 return bfd_reloc_overflow;
1149
1150 bfd_put_16 (input_bfd, (bfd_get_16 (input_bfd, hit_data))
1151 | (((Rvalue >> 16) & 0xf) << 8), hit_data);
1152 bfd_put_16 (input_bfd, (Rvalue) & 0xffff, hit_data + 2);
1153 }
1154 else
1155 {
1156 if (r_type == R_CR16_ABS24)
1157 {
1158 Rvalue1 = ((bfd_get_32 (input_bfd, hit_data) >> 16)
1159 | (((bfd_get_32 (input_bfd, hit_data) & 0xfff) >> 8) <<16)
1160 | (((bfd_get_32 (input_bfd, hit_data) & 0xf) <<20)));
1161
1162 /* Add or subtract the offset value. */
1163 if (Rvalue1 & 0x800000)
1164 Rvalue -= (~Rvalue1 + 1) & 0xffffff;
1165 else
1166 Rvalue += Rvalue1;
1167
1168 /* Check for Range. */
1169 if ((long) Rvalue > 0xffffff || (long) Rvalue < 0x0)
1170 return bfd_reloc_overflow;
1171
1172 Rvalue = ((((Rvalue >> 20) & 0xf) | (((Rvalue >> 16) & 0xf)<<8)
1173 | (bfd_get_32 (input_bfd, hit_data) & 0xf0f0))
1174 | ((Rvalue & 0xffff) << 16));
1175 }
1176 else if (r_type == R_CR16_DISP24)
1177 {
1178 Rvalue = ((((Rvalue >> 20)& 0xf) | (((Rvalue >>16) & 0xf)<<8)
1179 | (bfd_get_16 (input_bfd, hit_data)))
1180 | (((Rvalue & 0xfffe) | ((Rvalue >> 24) & 0x1)) << 16));
1181 }
1182 else if ((r_type == R_CR16_IMM32) || (r_type == R_CR16_IMM32a))
1183 {
1184 Rvalue1 =((((bfd_get_32 (input_bfd, hit_data)) >> 16) &0xffff)
1185 | (((bfd_get_32 (input_bfd, hit_data)) &0xffff)) << 16);
1186
1187 /* Add or subtract the offset value. */
1188 if (Rvalue1 & 0x80000000)
1189 Rvalue -= (~Rvalue1 + 1) & 0xffffffff;
1190 else
1191 Rvalue += Rvalue1;
1192
1193 /* Check for range. */
1194 if (Rvalue > 0xffffffff || (long) Rvalue < 0x0)
1195 return bfd_reloc_overflow;
1196
1197 Rvalue = (((Rvalue >> 16)& 0xffff) | (Rvalue & 0xffff) << 16);
1198 }
1199 else if (r_type == R_CR16_DISP24a)
1200 {
1201 Rvalue = (((Rvalue & 0xfffffe) | (Rvalue >> 23)));
1202 Rvalue = ((Rvalue >> 16) & 0xff) | ((Rvalue & 0xffff) << 16)
1203 | (bfd_get_32 (input_bfd, hit_data));
1204 }
1205 else if ((r_type == R_CR16_REGREL20)
1206 || (r_type == R_CR16_REGREL20a))
1207 {
1208 Rvalue1 = ((bfd_get_32 (input_bfd, hit_data) >> 16)
1209 | (((bfd_get_32 (input_bfd, hit_data) & 0xfff) >> 8) <<16));
1210 /* Add or subtract the offset value. */
1211 if (Rvalue1 & 0x80000)
1212 Rvalue -= (~Rvalue1 + 1) & 0xfffff;
1213 else
1214 Rvalue += Rvalue1;
1215
1216 /* Check for range. */
1217 if ((long) Rvalue > 0xfffff || (long) Rvalue < 0x0)
1218 return bfd_reloc_overflow;
1219
1220 Rvalue = (((((Rvalue >> 20)& 0xf) | (((Rvalue >>16) & 0xf)<<8)
1221 | ((Rvalue & 0xffff) << 16)))
1222 | (bfd_get_32 (input_bfd, hit_data) & 0xf0ff));
1223
1224 }
1225 else if (r_type == R_CR16_NUM32)
1226 {
1227 Rvalue1 = (bfd_get_32 (input_bfd, hit_data));
1228
1229 /* Add or subtract the offset value */
1230 if (Rvalue1 & 0x80000000)
1231 Rvalue -= (~Rvalue1 + 1) & 0xffffffff;
1232 else
1233 Rvalue += Rvalue1;
1234
1235 /* Check for Ranga */
1236 if (Rvalue > 0xffffffff)
1237 return bfd_reloc_overflow;
1238 }
1239
1240 bfd_put_32 (input_bfd, Rvalue, hit_data);
1241 }
1242 break;
1243
1244 default:
1245 return bfd_reloc_notsupported;
1246 }
1247
1248 return bfd_reloc_ok;
1249 }
1250
1251 /* Delete some bytes from a section while relaxing. */
1252
1253 static bfd_boolean
1254 elf32_cr16_relax_delete_bytes (struct bfd_link_info *link_info, bfd *abfd,
1255 asection *sec, bfd_vma addr, int count)
1256 {
1257 Elf_Internal_Shdr *symtab_hdr;
1258 unsigned int sec_shndx;
1259 bfd_byte *contents;
1260 Elf_Internal_Rela *irel, *irelend;
1261 bfd_vma toaddr;
1262 Elf_Internal_Sym *isym;
1263 Elf_Internal_Sym *isymend;
1264 struct elf_link_hash_entry **sym_hashes;
1265 struct elf_link_hash_entry **end_hashes;
1266 struct elf_link_hash_entry **start_hashes;
1267 unsigned int symcount;
1268
1269 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
1270
1271 contents = elf_section_data (sec)->this_hdr.contents;
1272
1273 toaddr = sec->size;
1274
1275 irel = elf_section_data (sec)->relocs;
1276 irelend = irel + sec->reloc_count;
1277
1278 /* Actually delete the bytes. */
1279 memmove (contents + addr, contents + addr + count,
1280 (size_t) (toaddr - addr - count));
1281 sec->size -= count;
1282
1283 /* Adjust all the relocs. */
1284 for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
1285 /* Get the new reloc address. */
1286 if ((irel->r_offset > addr && irel->r_offset < toaddr))
1287 irel->r_offset -= count;
1288
1289 /* Adjust the local symbols defined in this section. */
1290 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1291 isym = (Elf_Internal_Sym *) symtab_hdr->contents;
1292 for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
1293 {
1294 if (isym->st_shndx == sec_shndx
1295 && isym->st_value > addr
1296 && isym->st_value < toaddr)
1297 {
1298 /* Adjust the addend of SWITCH relocations in this section,
1299 which reference this local symbol. */
1300 #if 0
1301 for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
1302 {
1303 unsigned long r_symndx;
1304 Elf_Internal_Sym *rsym;
1305 bfd_vma addsym, subsym;
1306
1307 /* Skip if not a SWITCH relocation. */
1308 if (ELF32_R_TYPE (irel->r_info) != (int) R_CR16_SWITCH8
1309 && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_SWITCH16
1310 && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_SWITCH32)
1311 continue;
1312
1313 r_symndx = ELF32_R_SYM (irel->r_info);
1314 rsym = (Elf_Internal_Sym *) symtab_hdr->contents + r_symndx;
1315
1316 /* Skip if not the local adjusted symbol. */
1317 if (rsym != isym)
1318 continue;
1319
1320 addsym = isym->st_value;
1321 subsym = addsym - irel->r_addend;
1322
1323 /* Fix the addend only when -->> (addsym > addr >= subsym). */
1324 if (subsym <= addr)
1325 irel->r_addend -= count;
1326 else
1327 continue;
1328 }
1329 #endif
1330
1331 isym->st_value -= count;
1332 }
1333 }
1334
1335 /* Now adjust the global symbols defined in this section. */
1336 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
1337 - symtab_hdr->sh_info);
1338 sym_hashes = start_hashes = elf_sym_hashes (abfd);
1339 end_hashes = sym_hashes + symcount;
1340
1341 for (; sym_hashes < end_hashes; sym_hashes++)
1342 {
1343 struct elf_link_hash_entry *sym_hash = *sym_hashes;
1344
1345 /* The '--wrap SYMBOL' option is causing a pain when the object file,
1346 containing the definition of __wrap_SYMBOL, includes a direct
1347 call to SYMBOL as well. Since both __wrap_SYMBOL and SYMBOL reference
1348 the same symbol (which is __wrap_SYMBOL), but still exist as two
1349 different symbols in 'sym_hashes', we don't want to adjust
1350 the global symbol __wrap_SYMBOL twice.
1351 This check is only relevant when symbols are being wrapped. */
1352 if (link_info->wrap_hash != NULL)
1353 {
1354 struct elf_link_hash_entry **cur_sym_hashes;
1355
1356 /* Loop only over the symbols whom been already checked. */
1357 for (cur_sym_hashes = start_hashes; cur_sym_hashes < sym_hashes;
1358 cur_sym_hashes++)
1359 /* If the current symbol is identical to 'sym_hash', that means
1360 the symbol was already adjusted (or at least checked). */
1361 if (*cur_sym_hashes == sym_hash)
1362 break;
1363
1364 /* Don't adjust the symbol again. */
1365 if (cur_sym_hashes < sym_hashes)
1366 continue;
1367 }
1368
1369 if ((sym_hash->root.type == bfd_link_hash_defined
1370 || sym_hash->root.type == bfd_link_hash_defweak)
1371 && sym_hash->root.u.def.section == sec
1372 && sym_hash->root.u.def.value > addr
1373 && sym_hash->root.u.def.value < toaddr)
1374 sym_hash->root.u.def.value -= count;
1375 }
1376
1377 return TRUE;
1378 }
1379
1380 /* Relocate a CR16 ELF section. */
1381
1382 static bfd_boolean
1383 elf32_cr16_relocate_section (bfd *output_bfd, struct bfd_link_info *info,
1384 bfd *input_bfd, asection *input_section,
1385 bfd_byte *contents, Elf_Internal_Rela *relocs,
1386 Elf_Internal_Sym *local_syms,
1387 asection **local_sections)
1388 {
1389 Elf_Internal_Shdr *symtab_hdr;
1390 struct elf_link_hash_entry **sym_hashes;
1391 Elf_Internal_Rela *rel, *relend;
1392
1393 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1394 sym_hashes = elf_sym_hashes (input_bfd);
1395
1396 rel = relocs;
1397 relend = relocs + input_section->reloc_count;
1398 for (; rel < relend; rel++)
1399 {
1400 int r_type;
1401 reloc_howto_type *howto;
1402 unsigned long r_symndx;
1403 Elf_Internal_Sym *sym;
1404 asection *sec;
1405 struct elf_link_hash_entry *h;
1406 bfd_vma relocation;
1407 bfd_reloc_status_type r;
1408
1409 r_symndx = ELF32_R_SYM (rel->r_info);
1410 r_type = ELF32_R_TYPE (rel->r_info);
1411 howto = cr16_elf_howto_table + (r_type);
1412
1413 h = NULL;
1414 sym = NULL;
1415 sec = NULL;
1416 if (r_symndx < symtab_hdr->sh_info)
1417 {
1418 sym = local_syms + r_symndx;
1419 sec = local_sections[r_symndx];
1420 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1421 }
1422 else
1423 {
1424 bfd_boolean unresolved_reloc, warned;
1425
1426 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1427 r_symndx, symtab_hdr, sym_hashes,
1428 h, sec, relocation,
1429 unresolved_reloc, warned);
1430 }
1431
1432 if (sec != NULL && discarded_section (sec))
1433 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1434 rel, 1, relend, howto, 0, contents);
1435
1436 if (info->relocatable)
1437 continue;
1438
1439 r = cr16_elf_final_link_relocate (howto, input_bfd, output_bfd,
1440 input_section,
1441 contents, rel->r_offset,
1442 relocation, rel->r_addend,
1443 (struct elf_link_hash_entry *) h,
1444 r_symndx,
1445 info, sec, h == NULL);
1446
1447 if (r != bfd_reloc_ok)
1448 {
1449 const char *name;
1450 const char *msg = NULL;
1451
1452 if (h != NULL)
1453 name = h->root.root.string;
1454 else
1455 {
1456 name = (bfd_elf_string_from_elf_section
1457 (input_bfd, symtab_hdr->sh_link, sym->st_name));
1458 if (name == NULL || *name == '\0')
1459 name = bfd_section_name (input_bfd, sec);
1460 }
1461
1462 switch (r)
1463 {
1464 case bfd_reloc_overflow:
1465 if (!((*info->callbacks->reloc_overflow)
1466 (info, (h ? &h->root : NULL), name, howto->name,
1467 (bfd_vma) 0, input_bfd, input_section,
1468 rel->r_offset)))
1469 return FALSE;
1470 break;
1471
1472 case bfd_reloc_undefined:
1473 if (!((*info->callbacks->undefined_symbol)
1474 (info, name, input_bfd, input_section,
1475 rel->r_offset, TRUE)))
1476 return FALSE;
1477 break;
1478
1479 case bfd_reloc_outofrange:
1480 msg = _("internal error: out of range error");
1481 goto common_error;
1482
1483 case bfd_reloc_notsupported:
1484 msg = _("internal error: unsupported relocation error");
1485 goto common_error;
1486
1487 case bfd_reloc_dangerous:
1488 msg = _("internal error: dangerous error");
1489 goto common_error;
1490
1491 default:
1492 msg = _("internal error: unknown error");
1493 /* Fall through. */
1494
1495 common_error:
1496 if (!((*info->callbacks->warning)
1497 (info, msg, name, input_bfd, input_section,
1498 rel->r_offset)))
1499 return FALSE;
1500 break;
1501 }
1502 }
1503 }
1504
1505 return TRUE;
1506 }
1507
1508 /* This is a version of bfd_generic_get_relocated_section_contents
1509 which uses elf32_cr16_relocate_section. */
1510
1511 static bfd_byte *
1512 elf32_cr16_get_relocated_section_contents (bfd *output_bfd,
1513 struct bfd_link_info *link_info,
1514 struct bfd_link_order *link_order,
1515 bfd_byte *data,
1516 bfd_boolean relocatable,
1517 asymbol **symbols)
1518 {
1519 Elf_Internal_Shdr *symtab_hdr;
1520 asection *input_section = link_order->u.indirect.section;
1521 bfd *input_bfd = input_section->owner;
1522 asection **sections = NULL;
1523 Elf_Internal_Rela *internal_relocs = NULL;
1524 Elf_Internal_Sym *isymbuf = NULL;
1525
1526 /* We only need to handle the case of relaxing, or of having a
1527 particular set of section contents, specially. */
1528 if (relocatable
1529 || elf_section_data (input_section)->this_hdr.contents == NULL)
1530 return bfd_generic_get_relocated_section_contents (output_bfd, link_info,
1531 link_order, data,
1532 relocatable,
1533 symbols);
1534
1535 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1536
1537 memcpy (data, elf_section_data (input_section)->this_hdr.contents,
1538 (size_t) input_section->size);
1539
1540 if ((input_section->flags & SEC_RELOC) != 0
1541 && input_section->reloc_count > 0)
1542 {
1543 Elf_Internal_Sym *isym;
1544 Elf_Internal_Sym *isymend;
1545 asection **secpp;
1546 bfd_size_type amt;
1547
1548 internal_relocs = _bfd_elf_link_read_relocs (input_bfd, input_section,
1549 NULL, NULL, FALSE);
1550 if (internal_relocs == NULL)
1551 goto error_return;
1552
1553 if (symtab_hdr->sh_info != 0)
1554 {
1555 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1556 if (isymbuf == NULL)
1557 isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
1558 symtab_hdr->sh_info, 0,
1559 NULL, NULL, NULL);
1560 if (isymbuf == NULL)
1561 goto error_return;
1562 }
1563
1564 amt = symtab_hdr->sh_info;
1565 amt *= sizeof (asection *);
1566 sections = bfd_malloc (amt);
1567 if (sections == NULL && amt != 0)
1568 goto error_return;
1569
1570 isymend = isymbuf + symtab_hdr->sh_info;
1571 for (isym = isymbuf, secpp = sections; isym < isymend; ++isym, ++secpp)
1572 {
1573 asection *isec;
1574
1575 if (isym->st_shndx == SHN_UNDEF)
1576 isec = bfd_und_section_ptr;
1577 else if (isym->st_shndx == SHN_ABS)
1578 isec = bfd_abs_section_ptr;
1579 else if (isym->st_shndx == SHN_COMMON)
1580 isec = bfd_com_section_ptr;
1581 else
1582 isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx);
1583
1584 *secpp = isec;
1585 }
1586
1587 if (! elf32_cr16_relocate_section (output_bfd, link_info, input_bfd,
1588 input_section, data, internal_relocs,
1589 isymbuf, sections))
1590 goto error_return;
1591
1592 if (sections != NULL)
1593 free (sections);
1594 if (isymbuf != NULL
1595 && symtab_hdr->contents != (unsigned char *) isymbuf)
1596 free (isymbuf);
1597 if (elf_section_data (input_section)->relocs != internal_relocs)
1598 free (internal_relocs);
1599 }
1600
1601 return data;
1602
1603 error_return:
1604 if (sections != NULL)
1605 free (sections);
1606 if (isymbuf != NULL
1607 && symtab_hdr->contents != (unsigned char *) isymbuf)
1608 free (isymbuf);
1609 if (internal_relocs != NULL
1610 && elf_section_data (input_section)->relocs != internal_relocs)
1611 free (internal_relocs);
1612 return NULL;
1613 }
1614
1615 /* Assorted hash table functions. */
1616
1617 /* Initialize an entry in the link hash table. */
1618
1619 /* Create an entry in an CR16 ELF linker hash table. */
1620
1621 static struct bfd_hash_entry *
1622 elf32_cr16_link_hash_newfunc (struct bfd_hash_entry *entry,
1623 struct bfd_hash_table *table,
1624 const char *string)
1625 {
1626 struct elf32_cr16_link_hash_entry *ret =
1627 (struct elf32_cr16_link_hash_entry *) entry;
1628
1629 /* Allocate the structure if it has not already been allocated by a
1630 subclass. */
1631 if (ret == (struct elf32_cr16_link_hash_entry *) NULL)
1632 ret = ((struct elf32_cr16_link_hash_entry *)
1633 bfd_hash_allocate (table,
1634 sizeof (struct elf32_cr16_link_hash_entry)));
1635 if (ret == (struct elf32_cr16_link_hash_entry *) NULL)
1636 return (struct bfd_hash_entry *) ret;
1637
1638 /* Call the allocation method of the superclass. */
1639 ret = ((struct elf32_cr16_link_hash_entry *)
1640 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
1641 table, string));
1642 if (ret != (struct elf32_cr16_link_hash_entry *) NULL)
1643 {
1644 ret->direct_calls = 0;
1645 ret->stack_size = 0;
1646 ret->movm_args = 0;
1647 ret->movm_stack_size = 0;
1648 ret->flags = 0;
1649 ret->value = 0;
1650 }
1651
1652 return (struct bfd_hash_entry *) ret;
1653 }
1654
1655 /* Create an cr16 ELF linker hash table. */
1656
1657 static struct bfd_link_hash_table *
1658 elf32_cr16_link_hash_table_create (bfd *abfd)
1659 {
1660 struct elf_link_hash_table *ret;
1661 bfd_size_type amt = sizeof (struct elf_link_hash_table);
1662
1663 ret = (struct elf_link_hash_table *) bfd_zmalloc (amt);
1664 if (ret == (struct elf_link_hash_table *) NULL)
1665 return NULL;
1666
1667 if (!_bfd_elf_link_hash_table_init (ret, abfd,
1668 elf32_cr16_link_hash_newfunc,
1669 sizeof (struct elf32_cr16_link_hash_entry),
1670 GENERIC_ELF_DATA))
1671 {
1672 free (ret);
1673 return NULL;
1674 }
1675
1676 return &ret->root;
1677 }
1678
1679 static unsigned long
1680 elf_cr16_mach (flagword flags)
1681 {
1682 switch (flags)
1683 {
1684 case EM_CR16:
1685 default:
1686 return bfd_mach_cr16;
1687 }
1688 }
1689
1690 /* The final processing done just before writing out a CR16 ELF object
1691 file. This gets the CR16 architecture right based on the machine
1692 number. */
1693
1694 static void
1695 _bfd_cr16_elf_final_write_processing (bfd *abfd,
1696 bfd_boolean linker ATTRIBUTE_UNUSED)
1697 {
1698 unsigned long val;
1699 switch (bfd_get_mach (abfd))
1700 {
1701 default:
1702 case bfd_mach_cr16:
1703 val = EM_CR16;
1704 break;
1705 }
1706
1707
1708 elf_elfheader (abfd)->e_flags |= val;
1709 }
1710
1711
1712 static bfd_boolean
1713 _bfd_cr16_elf_object_p (bfd *abfd)
1714 {
1715 bfd_default_set_arch_mach (abfd, bfd_arch_cr16,
1716 elf_cr16_mach (elf_elfheader (abfd)->e_flags));
1717 return TRUE;
1718 }
1719
1720 /* Merge backend specific data from an object file to the output
1721 object file when linking. */
1722
1723 static bfd_boolean
1724 _bfd_cr16_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
1725 {
1726 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
1727 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
1728 return TRUE;
1729
1730 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
1731 && bfd_get_mach (obfd) < bfd_get_mach (ibfd))
1732 {
1733 if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd),
1734 bfd_get_mach (ibfd)))
1735 return FALSE;
1736 }
1737
1738 return TRUE;
1739 }
1740
1741
1742 /* This function handles relaxing for the CR16.
1743
1744 There's quite a few relaxing opportunites available on the CR16:
1745
1746 * bcond:24 -> bcond:16 1 byte
1747 * bcond:16 -> bcond:8 1 byte
1748 * arithmetic imm32 -> arithmetic imm20 12 bits
1749 * arithmetic imm20/imm16 -> arithmetic imm4 12/16 bits
1750
1751 Symbol- and reloc-reading infrastructure copied from elf-m10200.c. */
1752
1753 static bfd_boolean
1754 elf32_cr16_relax_section (bfd *abfd, asection *sec,
1755 struct bfd_link_info *link_info, bfd_boolean *again)
1756 {
1757 Elf_Internal_Shdr *symtab_hdr;
1758 Elf_Internal_Rela *internal_relocs;
1759 Elf_Internal_Rela *irel, *irelend;
1760 bfd_byte *contents = NULL;
1761 Elf_Internal_Sym *isymbuf = NULL;
1762
1763 /* Assume nothing changes. */
1764 *again = FALSE;
1765
1766 /* We don't have to do anything for a relocatable link, if
1767 this section does not have relocs, or if this is not a
1768 code section. */
1769 if (link_info->relocatable
1770 || (sec->flags & SEC_RELOC) == 0
1771 || sec->reloc_count == 0
1772 || (sec->flags & SEC_CODE) == 0)
1773 return TRUE;
1774
1775 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1776
1777 /* Get a copy of the native relocations. */
1778 internal_relocs = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL,
1779 link_info->keep_memory);
1780 if (internal_relocs == NULL)
1781 goto error_return;
1782
1783 /* Walk through them looking for relaxing opportunities. */
1784 irelend = internal_relocs + sec->reloc_count;
1785 for (irel = internal_relocs; irel < irelend; irel++)
1786 {
1787 bfd_vma symval;
1788
1789 /* If this isn't something that can be relaxed, then ignore
1790 this reloc. */
1791 if (ELF32_R_TYPE (irel->r_info) != (int) R_CR16_DISP16
1792 && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_DISP24
1793 && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_IMM32
1794 && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_IMM20
1795 && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_IMM16)
1796 continue;
1797
1798 /* Get the section contents if we haven't done so already. */
1799 if (contents == NULL)
1800 {
1801 /* Get cached copy if it exists. */
1802 if (elf_section_data (sec)->this_hdr.contents != NULL)
1803 contents = elf_section_data (sec)->this_hdr.contents;
1804 /* Go get them off disk. */
1805 else if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1806 goto error_return;
1807 }
1808
1809 /* Read this BFD's local symbols if we haven't done so already. */
1810 if (isymbuf == NULL && symtab_hdr->sh_info != 0)
1811 {
1812 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1813 if (isymbuf == NULL)
1814 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
1815 symtab_hdr->sh_info, 0,
1816 NULL, NULL, NULL);
1817 if (isymbuf == NULL)
1818 goto error_return;
1819 }
1820
1821 /* Get the value of the symbol referred to by the reloc. */
1822 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
1823 {
1824 /* A local symbol. */
1825 Elf_Internal_Sym *isym;
1826 asection *sym_sec;
1827
1828 isym = isymbuf + ELF32_R_SYM (irel->r_info);
1829 if (isym->st_shndx == SHN_UNDEF)
1830 sym_sec = bfd_und_section_ptr;
1831 else if (isym->st_shndx == SHN_ABS)
1832 sym_sec = bfd_abs_section_ptr;
1833 else if (isym->st_shndx == SHN_COMMON)
1834 sym_sec = bfd_com_section_ptr;
1835 else
1836 sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
1837 symval = (isym->st_value
1838 + sym_sec->output_section->vma
1839 + sym_sec->output_offset);
1840 }
1841 else
1842 {
1843 unsigned long indx;
1844 struct elf_link_hash_entry *h;
1845
1846 /* An external symbol. */
1847 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
1848 h = elf_sym_hashes (abfd)[indx];
1849 BFD_ASSERT (h != NULL);
1850
1851 if (h->root.type != bfd_link_hash_defined
1852 && h->root.type != bfd_link_hash_defweak)
1853 /* This appears to be a reference to an undefined
1854 symbol. Just ignore it--it will be caught by the
1855 regular reloc processing. */
1856 continue;
1857
1858 symval = (h->root.u.def.value
1859 + h->root.u.def.section->output_section->vma
1860 + h->root.u.def.section->output_offset);
1861 }
1862
1863 /* For simplicity of coding, we are going to modify the section
1864 contents, the section relocs, and the BFD symbol table. We
1865 must tell the rest of the code not to free up this
1866 information. It would be possible to instead create a table
1867 of changes which have to be made, as is done in coff-mips.c;
1868 that would be more work, but would require less memory when
1869 the linker is run. */
1870
1871 /* Try to turn a 24 branch/call into a 16bit relative
1872 branch/call. */
1873 if (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_DISP24)
1874 {
1875 bfd_vma value = symval;
1876
1877 /* Deal with pc-relative gunk. */
1878 value -= (sec->output_section->vma + sec->output_offset);
1879 value -= irel->r_offset;
1880 value += irel->r_addend;
1881
1882 /* See if the value will fit in 16 bits, note the high value is
1883 0xfffe + 2 as the target will be two bytes closer if we are
1884 able to relax. */
1885 if ((long) value < 0x10000 && (long) value > -0x10002)
1886 {
1887 unsigned int code;
1888
1889 /* Get the opcode. */
1890 code = (unsigned int) bfd_get_32 (abfd, contents + irel->r_offset);
1891
1892 /* Verify it's a 'bcond' and fix the opcode. */
1893 if ((code & 0xffff) == 0x0010)
1894 bfd_put_16 (abfd, 0x1800 | ((0xf & (code >> 20)) << 4), contents + irel->r_offset);
1895 else
1896 continue;
1897
1898 /* Note that we've changed the relocs, section contents, etc. */
1899 elf_section_data (sec)->relocs = internal_relocs;
1900 elf_section_data (sec)->this_hdr.contents = contents;
1901 symtab_hdr->contents = (unsigned char *) isymbuf;
1902
1903 /* Fix the relocation's type. */
1904 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1905 R_CR16_DISP16);
1906
1907 /* Delete two bytes of data. */
1908 if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec,
1909 irel->r_offset + 2, 2))
1910 goto error_return;
1911
1912 /* That will change things, so, we should relax again.
1913 Note that this is not required, and it may be slow. */
1914 *again = TRUE;
1915 }
1916 }
1917
1918 /* Try to turn a 16bit pc-relative branch into an
1919 8bit pc-relative branch. */
1920 if (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_DISP16)
1921 {
1922 bfd_vma value = symval;
1923
1924 /* Deal with pc-relative gunk. */
1925 value -= (sec->output_section->vma + sec->output_offset);
1926 value -= irel->r_offset;
1927 value += irel->r_addend;
1928
1929 /* See if the value will fit in 8 bits, note the high value is
1930 0xfc + 2 as the target will be two bytes closer if we are
1931 able to relax. */
1932 /*if ((long) value < 0x1fa && (long) value > -0x100) REVISIT:range */
1933 if ((long) value < 0xfa && (long) value > -0x100)
1934 {
1935 unsigned short code;
1936
1937 /* Get the opcode. */
1938 code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset);
1939
1940 /* Verify it's a 'bcond' and fix the opcode. */
1941 if ((code & 0xff0f) == 0x1800)
1942 bfd_put_16 (abfd, (code & 0xf0f0), contents + irel->r_offset);
1943 else
1944 continue;
1945
1946 /* Note that we've changed the relocs, section contents, etc. */
1947 elf_section_data (sec)->relocs = internal_relocs;
1948 elf_section_data (sec)->this_hdr.contents = contents;
1949 symtab_hdr->contents = (unsigned char *) isymbuf;
1950
1951 /* Fix the relocation's type. */
1952 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1953 R_CR16_DISP8);
1954
1955 /* Delete two bytes of data. */
1956 if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec,
1957 irel->r_offset + 2, 2))
1958 goto error_return;
1959
1960 /* That will change things, so, we should relax again.
1961 Note that this is not required, and it may be slow. */
1962 *again = TRUE;
1963 }
1964 }
1965
1966 /* Try to turn a 32-bit IMM address into a 20/16-bit IMM address */
1967 if (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_IMM32)
1968 {
1969 bfd_vma value = symval;
1970 unsigned short is_add_mov = 0;
1971 bfd_vma value1 = 0;
1972
1973 /* Get the existing value from the mcode */
1974 value1 = ((bfd_get_32 (abfd, contents + irel->r_offset + 2) >> 16)
1975 |(((bfd_get_32 (abfd, contents + irel->r_offset + 2) & 0xffff) << 16)));
1976
1977 /* See if the value will fit in 20 bits. */
1978 if ((long) (value + value1) < 0xfffff && (long) (value + value1) > 0)
1979 {
1980 unsigned short code;
1981
1982 /* Get the opcode. */
1983 code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset);
1984
1985 /* Verify it's a 'arithmetic ADDD or MOVD instruction'.
1986 For ADDD and MOVD only, convert to IMM32 -> IMM20. */
1987
1988 if (((code & 0xfff0) == 0x0070) || ((code & 0xfff0) == 0x0020))
1989 is_add_mov = 1;
1990
1991 if (is_add_mov)
1992 {
1993 /* Note that we've changed the relocs, section contents,
1994 etc. */
1995 elf_section_data (sec)->relocs = internal_relocs;
1996 elf_section_data (sec)->this_hdr.contents = contents;
1997 symtab_hdr->contents = (unsigned char *) isymbuf;
1998
1999 /* Fix the opcode. */
2000 if ((code & 0xfff0) == 0x0070) /* For movd. */
2001 bfd_put_8 (abfd, 0x05, contents + irel->r_offset + 1);
2002 else /* code == 0x0020 for addd. */
2003 bfd_put_8 (abfd, 0x04, contents + irel->r_offset + 1);
2004
2005 bfd_put_8 (abfd, (code & 0xf) << 4, contents + irel->r_offset);
2006
2007 /* If existing value is nagavive adjust approriately
2008 place the 16-20bits (ie 4 bit) in new opcode,
2009 as the 0xffffxxxx, the higher 2 byte values removed. */
2010 if (value1 & 0x80000000)
2011 bfd_put_8 (abfd, (0x0f | (bfd_get_8(abfd, contents + irel->r_offset))), contents + irel->r_offset);
2012 else
2013 bfd_put_8 (abfd, (((value1 >> 16)&0xf) | (bfd_get_8(abfd, contents + irel->r_offset))), contents + irel->r_offset);
2014
2015 /* Fix the relocation's type. */
2016 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2017 R_CR16_IMM20);
2018
2019 /* Delete two bytes of data. */
2020 if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec,
2021 irel->r_offset + 2, 2))
2022 goto error_return;
2023
2024 /* That will change things, so, we should relax again.
2025 Note that this is not required, and it may be slow. */
2026 *again = TRUE;
2027 }
2028 }
2029
2030 /* See if the value will fit in 16 bits. */
2031 if ((!is_add_mov)
2032 && ((long)(value + value1) < 0x7fff && (long)(value + value1) > 0))
2033 {
2034 unsigned short code;
2035
2036 /* Get the opcode. */
2037 code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset);
2038
2039 /* Note that we've changed the relocs, section contents, etc. */
2040 elf_section_data (sec)->relocs = internal_relocs;
2041 elf_section_data (sec)->this_hdr.contents = contents;
2042 symtab_hdr->contents = (unsigned char *) isymbuf;
2043
2044 /* Fix the opcode. */
2045 if ((code & 0xf0) == 0x70) /* For movd. */
2046 bfd_put_8 (abfd, 0x54, contents + irel->r_offset + 1);
2047 else if ((code & 0xf0) == 0x20) /* For addd. */
2048 bfd_put_8 (abfd, 0x60, contents + irel->r_offset + 1);
2049 else if ((code & 0xf0) == 0x90) /* For cmpd. */
2050 bfd_put_8 (abfd, 0x56, contents + irel->r_offset + 1);
2051 else
2052 continue;
2053
2054 bfd_put_8 (abfd, 0xb0 | (code & 0xf), contents + irel->r_offset);
2055
2056 /* If existing value is nagavive adjust approriately
2057 place the 12-16bits (ie 4 bit) in new opcode,
2058 as the 0xfffffxxx, the higher 2 byte values removed. */
2059 if (value1 & 0x80000000)
2060 bfd_put_8 (abfd, (0x0f | (bfd_get_8(abfd, contents + irel->r_offset))), contents + irel->r_offset);
2061 else
2062 bfd_put_16 (abfd, value1, contents + irel->r_offset + 2);
2063
2064
2065 /* Fix the relocation's type. */
2066 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2067 R_CR16_IMM16);
2068
2069 /* Delete two bytes of data. */
2070 if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec,
2071 irel->r_offset + 2, 2))
2072 goto error_return;
2073
2074 /* That will change things, so, we should relax again.
2075 Note that this is not required, and it may be slow. */
2076 *again = TRUE;
2077 }
2078 }
2079
2080 #if 0
2081 /* Try to turn a 16bit immediate address into a 4bit
2082 immediate address. */
2083 if ((ELF32_R_TYPE (irel->r_info) == (int) R_CR16_IMM20)
2084 || (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_IMM16))
2085 {
2086 bfd_vma value = symval;
2087 bfd_vma value1 = 0;
2088
2089 /* Get the existing value from the mcode */
2090 value1 = ((bfd_get_16 (abfd, contents + irel->r_offset + 2) & 0xffff));
2091
2092 if (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_IMM20)
2093 {
2094 value1 |= ((bfd_get_16 (abfd, contents + irel->r_offset + 1) & 0xf000) << 0x4);
2095 }
2096
2097 /* See if the value will fit in 4 bits. */
2098 if ((((long) (value + value1)) < 0xf)
2099 && (((long) (value + value1)) > 0))
2100 {
2101 unsigned short code;
2102
2103 /* Get the opcode. */
2104 code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset);
2105
2106 /* Note that we've changed the relocs, section contents, etc. */
2107 elf_section_data (sec)->relocs = internal_relocs;
2108 elf_section_data (sec)->this_hdr.contents = contents;
2109 symtab_hdr->contents = (unsigned char *) isymbuf;
2110
2111 /* Fix the opcode. */
2112 if (((code & 0x0f00) == 0x0400) || ((code & 0x0f00) == 0x0500))
2113 {
2114 if ((code & 0x0f00) == 0x0400) /* For movd imm20. */
2115 bfd_put_8 (abfd, 0x60, contents + irel->r_offset);
2116 else /* For addd imm20. */
2117 bfd_put_8 (abfd, 0x54, contents + irel->r_offset);
2118 bfd_put_8 (abfd, (code & 0xf0) >> 4, contents + irel->r_offset + 1);
2119 }
2120 else
2121 {
2122 if ((code & 0xfff0) == 0x56b0) /* For cmpd imm16. */
2123 bfd_put_8 (abfd, 0x56, contents + irel->r_offset);
2124 else if ((code & 0xfff0) == 0x54b0) /* For movd imm16. */
2125 bfd_put_8 (abfd, 0x54, contents + irel->r_offset);
2126 else if ((code & 0xfff0) == 0x58b0) /* For movb imm16. */
2127 bfd_put_8 (abfd, 0x58, contents + irel->r_offset);
2128 else if ((code & 0xfff0) == 0x5Ab0) /* For movw imm16. */
2129 bfd_put_8 (abfd, 0x5A, contents + irel->r_offset);
2130 else if ((code & 0xfff0) == 0x60b0) /* For addd imm16. */
2131 bfd_put_8 (abfd, 0x60, contents + irel->r_offset);
2132 else if ((code & 0xfff0) == 0x30b0) /* For addb imm16. */
2133 bfd_put_8 (abfd, 0x30, contents + irel->r_offset);
2134 else if ((code & 0xfff0) == 0x2Cb0) /* For addub imm16. */
2135 bfd_put_8 (abfd, 0x2C, contents + irel->r_offset);
2136 else if ((code & 0xfff0) == 0x32b0) /* For adduw imm16. */
2137 bfd_put_8 (abfd, 0x32, contents + irel->r_offset);
2138 else if ((code & 0xfff0) == 0x38b0) /* For subb imm16. */
2139 bfd_put_8 (abfd, 0x38, contents + irel->r_offset);
2140 else if ((code & 0xfff0) == 0x3Cb0) /* For subcb imm16. */
2141 bfd_put_8 (abfd, 0x3C, contents + irel->r_offset);
2142 else if ((code & 0xfff0) == 0x3Fb0) /* For subcw imm16. */
2143 bfd_put_8 (abfd, 0x3F, contents + irel->r_offset);
2144 else if ((code & 0xfff0) == 0x3Ab0) /* For subw imm16. */
2145 bfd_put_8 (abfd, 0x3A, contents + irel->r_offset);
2146 else if ((code & 0xfff0) == 0x50b0) /* For cmpb imm16. */
2147 bfd_put_8 (abfd, 0x50, contents + irel->r_offset);
2148 else if ((code & 0xfff0) == 0x52b0) /* For cmpw imm16. */
2149 bfd_put_8 (abfd, 0x52, contents + irel->r_offset);
2150 else
2151 continue;
2152
2153 bfd_put_8 (abfd, (code & 0xf), contents + irel->r_offset + 1);
2154 }
2155
2156 /* Fix the relocation's type. */
2157 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
2158 R_CR16_IMM4);
2159
2160 /* Delete two bytes of data. */
2161 if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec,
2162 irel->r_offset + 2, 2))
2163 goto error_return;
2164
2165 /* That will change things, so, we should relax again.
2166 Note that this is not required, and it may be slow. */
2167 *again = TRUE;
2168 }
2169 }
2170 #endif
2171 }
2172
2173 if (isymbuf != NULL
2174 && symtab_hdr->contents != (unsigned char *) isymbuf)
2175 {
2176 if (! link_info->keep_memory)
2177 free (isymbuf);
2178 else
2179 /* Cache the symbols for elf_link_input_bfd. */
2180 symtab_hdr->contents = (unsigned char *) isymbuf;
2181 }
2182
2183 if (contents != NULL
2184 && elf_section_data (sec)->this_hdr.contents != contents)
2185 {
2186 if (! link_info->keep_memory)
2187 free (contents);
2188 else
2189 /* Cache the section contents for elf_link_input_bfd. */
2190 elf_section_data (sec)->this_hdr.contents = contents;
2191
2192 }
2193
2194 if (internal_relocs != NULL
2195 && elf_section_data (sec)->relocs != internal_relocs)
2196 free (internal_relocs);
2197
2198 return TRUE;
2199
2200 error_return:
2201 if (isymbuf != NULL
2202 && symtab_hdr->contents != (unsigned char *) isymbuf)
2203 free (isymbuf);
2204 if (contents != NULL
2205 && elf_section_data (sec)->this_hdr.contents != contents)
2206 free (contents);
2207 if (internal_relocs != NULL
2208 && elf_section_data (sec)->relocs != internal_relocs)
2209 free (internal_relocs);
2210
2211 return FALSE;
2212 }
2213
2214 static asection *
2215 elf32_cr16_gc_mark_hook (asection *sec,
2216 struct bfd_link_info *info,
2217 Elf_Internal_Rela *rel,
2218 struct elf_link_hash_entry *h,
2219 Elf_Internal_Sym *sym)
2220 {
2221 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
2222 }
2223
2224 /* Update the got entry reference counts for the section being removed. */
2225
2226 static bfd_boolean
2227 elf32_cr16_gc_sweep_hook (bfd *abfd ATTRIBUTE_UNUSED,
2228 struct bfd_link_info *info ATTRIBUTE_UNUSED,
2229 asection *sec ATTRIBUTE_UNUSED,
2230 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED)
2231 {
2232 /* We don't support garbage collection of GOT and PLT relocs yet. */
2233 return TRUE;
2234 }
2235
2236 /* Create dynamic sections when linking against a dynamic object. */
2237
2238 static bfd_boolean
2239 _bfd_cr16_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2240 {
2241 flagword flags;
2242 asection * s;
2243 const struct elf_backend_data * bed = get_elf_backend_data (abfd);
2244 int ptralign = 0;
2245
2246 switch (bed->s->arch_size)
2247 {
2248 case 16:
2249 ptralign = 1;
2250 break;
2251
2252 case 32:
2253 ptralign = 2;
2254 break;
2255
2256 default:
2257 bfd_set_error (bfd_error_bad_value);
2258 return FALSE;
2259 }
2260
2261 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
2262 .rel[a].bss sections. */
2263
2264 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2265 | SEC_LINKER_CREATED);
2266
2267 s = bfd_make_section_anyway_with_flags (abfd,
2268 (bed->default_use_rela_p
2269 ? ".rela.plt" : ".rel.plt"),
2270 flags | SEC_READONLY);
2271 if (s == NULL
2272 || ! bfd_set_section_alignment (abfd, s, ptralign))
2273 return FALSE;
2274
2275 if (! _bfd_cr16_elf_create_got_section (abfd, info))
2276 return FALSE;
2277
2278 if (bed->want_dynbss)
2279 {
2280 /* The .dynbss section is a place to put symbols which are defined
2281 by dynamic objects, are referenced by regular objects, and are
2282 not functions. We must allocate space for them in the process
2283 image and use a R_*_COPY reloc to tell the dynamic linker to
2284 initialize them at run time. The linker script puts the .dynbss
2285 section into the .bss section of the final image. */
2286 s = bfd_make_section_anyway_with_flags (abfd, ".dynbss",
2287 SEC_ALLOC | SEC_LINKER_CREATED);
2288 if (s == NULL)
2289 return FALSE;
2290
2291 /* The .rel[a].bss section holds copy relocs. This section is not
2292 normally needed. We need to create it here, though, so that the
2293 linker will map it to an output section. We can't just create it
2294 only if we need it, because we will not know whether we need it
2295 until we have seen all the input files, and the first time the
2296 main linker code calls BFD after examining all the input files
2297 (size_dynamic_sections) the input sections have already been
2298 mapped to the output sections. If the section turns out not to
2299 be needed, we can discard it later. We will never need this
2300 section when generating a shared object, since they do not use
2301 copy relocs. */
2302 if (! info->executable)
2303 {
2304 s = bfd_make_section_anyway_with_flags (abfd,
2305 (bed->default_use_rela_p
2306 ? ".rela.bss" : ".rel.bss"),
2307 flags | SEC_READONLY);
2308 if (s == NULL
2309 || ! bfd_set_section_alignment (abfd, s, ptralign))
2310 return FALSE;
2311 }
2312 }
2313
2314 return TRUE;
2315 }
2316 \f
2317 /* Adjust a symbol defined by a dynamic object and referenced by a
2318 regular object. The current definition is in some section of the
2319 dynamic object, but we're not including those sections. We have to
2320 change the definition to something the rest of the link can
2321 understand. */
2322
2323 static bfd_boolean
2324 _bfd_cr16_elf_adjust_dynamic_symbol (struct bfd_link_info * info,
2325 struct elf_link_hash_entry * h)
2326 {
2327 bfd * dynobj;
2328 asection * s;
2329
2330 dynobj = elf_hash_table (info)->dynobj;
2331
2332 /* Make sure we know what is going on here. */
2333 BFD_ASSERT (dynobj != NULL
2334 && (h->needs_plt
2335 || h->u.weakdef != NULL
2336 || (h->def_dynamic
2337 && h->ref_regular
2338 && !h->def_regular)));
2339
2340 /* If this is a function, put it in the procedure linkage table. We
2341 will fill in the contents of the procedure linkage table later,
2342 when we know the address of the .got section. */
2343 if (h->type == STT_FUNC
2344 || h->needs_plt)
2345 {
2346 if (! info->executable
2347 && !h->def_dynamic
2348 && !h->ref_dynamic)
2349 {
2350 /* This case can occur if we saw a PLT reloc in an input
2351 file, but the symbol was never referred to by a dynamic
2352 object. In such a case, we don't actually need to build
2353 a procedure linkage table, and we can just do a REL32
2354 reloc instead. */
2355 BFD_ASSERT (h->needs_plt);
2356 return TRUE;
2357 }
2358
2359 /* Make sure this symbol is output as a dynamic symbol. */
2360 if (h->dynindx == -1)
2361 {
2362 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2363 return FALSE;
2364 }
2365
2366 /* We also need to make an entry in the .got.plt section, which
2367 will be placed in the .got section by the linker script. */
2368
2369 s = bfd_get_linker_section (dynobj, ".got.plt");
2370 BFD_ASSERT (s != NULL);
2371 s->size += 4;
2372
2373 /* We also need to make an entry in the .rela.plt section. */
2374
2375 s = bfd_get_linker_section (dynobj, ".rela.plt");
2376 BFD_ASSERT (s != NULL);
2377 s->size += sizeof (Elf32_External_Rela);
2378
2379 return TRUE;
2380 }
2381
2382 /* If this is a weak symbol, and there is a real definition, the
2383 processor independent code will have arranged for us to see the
2384 real definition first, and we can just use the same value. */
2385 if (h->u.weakdef != NULL)
2386 {
2387 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2388 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2389 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2390 h->root.u.def.value = h->u.weakdef->root.u.def.value;
2391 return TRUE;
2392 }
2393
2394 /* This is a reference to a symbol defined by a dynamic object which
2395 is not a function. */
2396
2397 /* If we are creating a shared library, we must presume that the
2398 only references to the symbol are via the global offset table.
2399 For such cases we need not do anything here; the relocations will
2400 be handled correctly by relocate_section. */
2401 if (info->executable)
2402 return TRUE;
2403
2404 /* If there are no references to this symbol that do not use the
2405 GOT, we don't need to generate a copy reloc. */
2406 if (!h->non_got_ref)
2407 return TRUE;
2408
2409 /* We must allocate the symbol in our .dynbss section, which will
2410 become part of the .bss section of the executable. There will be
2411 an entry for this symbol in the .dynsym section. The dynamic
2412 object will contain position independent code, so all references
2413 from the dynamic object to this symbol will go through the global
2414 offset table. The dynamic linker will use the .dynsym entry to
2415 determine the address it must put in the global offset table, so
2416 both the dynamic object and the regular object will refer to the
2417 same memory location for the variable. */
2418
2419 s = bfd_get_linker_section (dynobj, ".dynbss");
2420 BFD_ASSERT (s != NULL);
2421
2422 /* We must generate a R_CR16_COPY reloc to tell the dynamic linker to
2423 copy the initial value out of the dynamic object and into the
2424 runtime process image. We need to remember the offset into the
2425 .rela.bss section we are going to use. */
2426 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
2427 {
2428 asection * srel;
2429
2430 srel = bfd_get_linker_section (dynobj, ".rela.bss");
2431 BFD_ASSERT (srel != NULL);
2432 srel->size += sizeof (Elf32_External_Rela);
2433 h->needs_copy = 1;
2434 }
2435
2436 return _bfd_elf_adjust_dynamic_copy (h, s);
2437 }
2438
2439 /* Set the sizes of the dynamic sections. */
2440
2441 static bfd_boolean
2442 _bfd_cr16_elf_size_dynamic_sections (bfd * output_bfd,
2443 struct bfd_link_info * info)
2444 {
2445 bfd * dynobj;
2446 asection * s;
2447 bfd_boolean plt;
2448 bfd_boolean relocs;
2449 bfd_boolean reltext;
2450
2451 dynobj = elf_hash_table (info)->dynobj;
2452 BFD_ASSERT (dynobj != NULL);
2453
2454 if (elf_hash_table (info)->dynamic_sections_created)
2455 {
2456 /* Set the contents of the .interp section to the interpreter. */
2457 if (info->executable)
2458 {
2459 #if 0
2460 s = bfd_get_linker_section (dynobj, ".interp");
2461 BFD_ASSERT (s != NULL);
2462 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2463 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2464 #endif
2465 }
2466 }
2467 else
2468 {
2469 /* We may have created entries in the .rela.got section.
2470 However, if we are not creating the dynamic sections, we will
2471 not actually use these entries. Reset the size of .rela.got,
2472 which will cause it to get stripped from the output file
2473 below. */
2474 s = bfd_get_linker_section (dynobj, ".rela.got");
2475 if (s != NULL)
2476 s->size = 0;
2477 }
2478
2479 /* The check_relocs and adjust_dynamic_symbol entry points have
2480 determined the sizes of the various dynamic sections. Allocate
2481 memory for them. */
2482 plt = FALSE;
2483 relocs = FALSE;
2484 reltext = FALSE;
2485 for (s = dynobj->sections; s != NULL; s = s->next)
2486 {
2487 const char * name;
2488
2489 if ((s->flags & SEC_LINKER_CREATED) == 0)
2490 continue;
2491
2492 /* It's OK to base decisions on the section name, because none
2493 of the dynobj section names depend upon the input files. */
2494 name = bfd_get_section_name (dynobj, s);
2495
2496 if (strcmp (name, ".plt") == 0)
2497 {
2498 /* Remember whether there is a PLT. */
2499 plt = s->size != 0;
2500 }
2501 else if (CONST_STRNEQ (name, ".rela"))
2502 {
2503 if (s->size != 0)
2504 {
2505 asection * target;
2506
2507 /* Remember whether there are any reloc sections other
2508 than .rela.plt. */
2509 if (strcmp (name, ".rela.plt") != 0)
2510 {
2511 const char * outname;
2512
2513 relocs = TRUE;
2514
2515 /* If this relocation section applies to a read only
2516 section, then we probably need a DT_TEXTREL
2517 entry. The entries in the .rela.plt section
2518 really apply to the .got section, which we
2519 created ourselves and so know is not readonly. */
2520 outname = bfd_get_section_name (output_bfd,
2521 s->output_section);
2522 target = bfd_get_section_by_name (output_bfd, outname + 5);
2523 if (target != NULL
2524 && (target->flags & SEC_READONLY) != 0
2525 && (target->flags & SEC_ALLOC) != 0)
2526 reltext = TRUE;
2527 }
2528
2529 /* We use the reloc_count field as a counter if we need
2530 to copy relocs into the output file. */
2531 s->reloc_count = 0;
2532 }
2533 }
2534 else if (! CONST_STRNEQ (name, ".got")
2535 && strcmp (name, ".dynbss") != 0)
2536 /* It's not one of our sections, so don't allocate space. */
2537 continue;
2538
2539 if (s->size == 0)
2540 {
2541 /* If we don't need this section, strip it from the
2542 output file. This is mostly to handle .rela.bss and
2543 .rela.plt. We must create both sections in
2544 create_dynamic_sections, because they must be created
2545 before the linker maps input sections to output
2546 sections. The linker does that before
2547 adjust_dynamic_symbol is called, and it is that
2548 function which decides whether anything needs to go
2549 into these sections. */
2550 s->flags |= SEC_EXCLUDE;
2551 continue;
2552 }
2553
2554 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2555 continue;
2556
2557 /* Allocate memory for the section contents. We use bfd_zalloc
2558 here in case unused entries are not reclaimed before the
2559 section's contents are written out. This should not happen,
2560 but this way if it does, we get a R_CR16_NONE reloc
2561 instead of garbage. */
2562 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2563 if (s->contents == NULL)
2564 return FALSE;
2565 }
2566
2567 if (elf_hash_table (info)->dynamic_sections_created)
2568 {
2569 /* Add some entries to the .dynamic section. We fill in the
2570 values later, in _bfd_cr16_elf_finish_dynamic_sections,
2571 but we must add the entries now so that we get the correct
2572 size for the .dynamic section. The DT_DEBUG entry is filled
2573 in by the dynamic linker and used by the debugger. */
2574 if (! info->executable)
2575 {
2576 if (!_bfd_elf_add_dynamic_entry (info, DT_DEBUG, 0))
2577 return FALSE;
2578 }
2579
2580 if (plt)
2581 {
2582 if (!_bfd_elf_add_dynamic_entry (info, DT_PLTGOT, 0)
2583 || !_bfd_elf_add_dynamic_entry (info, DT_PLTRELSZ, 0)
2584 || !_bfd_elf_add_dynamic_entry (info, DT_PLTREL, DT_RELA)
2585 || !_bfd_elf_add_dynamic_entry (info, DT_JMPREL, 0))
2586 return FALSE;
2587 }
2588
2589 if (relocs)
2590 {
2591 if (!_bfd_elf_add_dynamic_entry (info, DT_RELA, 0)
2592 || !_bfd_elf_add_dynamic_entry (info, DT_RELASZ, 0)
2593 || !_bfd_elf_add_dynamic_entry (info, DT_RELAENT,
2594 sizeof (Elf32_External_Rela)))
2595 return FALSE;
2596 }
2597
2598 if (reltext)
2599 {
2600 if (!_bfd_elf_add_dynamic_entry (info, DT_TEXTREL, 0))
2601 return FALSE;
2602 }
2603 }
2604
2605 return TRUE;
2606 }
2607
2608 /* Finish up dynamic symbol handling. We set the contents of various
2609 dynamic sections here. */
2610
2611 static bfd_boolean
2612 _bfd_cr16_elf_finish_dynamic_symbol (bfd * output_bfd,
2613 struct bfd_link_info * info,
2614 struct elf_link_hash_entry * h,
2615 Elf_Internal_Sym * sym)
2616 {
2617 bfd * dynobj;
2618
2619 dynobj = elf_hash_table (info)->dynobj;
2620
2621 if (h->got.offset != (bfd_vma) -1)
2622 {
2623 asection * sgot;
2624 asection * srel;
2625 Elf_Internal_Rela rel;
2626
2627 /* This symbol has an entry in the global offset table. Set it up. */
2628
2629 sgot = bfd_get_linker_section (dynobj, ".got");
2630 srel = bfd_get_linker_section (dynobj, ".rela.got");
2631 BFD_ASSERT (sgot != NULL && srel != NULL);
2632
2633 rel.r_offset = (sgot->output_section->vma
2634 + sgot->output_offset
2635 + (h->got.offset & ~1));
2636
2637 /* If this is a -Bsymbolic link, and the symbol is defined
2638 locally, we just want to emit a RELATIVE reloc. Likewise if
2639 the symbol was forced to be local because of a version file.
2640 The entry in the global offset table will already have been
2641 initialized in the relocate_section function. */
2642 if (info->executable
2643 && (info->symbolic || h->dynindx == -1)
2644 && h->def_regular)
2645 {
2646 rel.r_info = ELF32_R_INFO (0, R_CR16_GOT_REGREL20);
2647 rel.r_addend = (h->root.u.def.value
2648 + h->root.u.def.section->output_section->vma
2649 + h->root.u.def.section->output_offset);
2650 }
2651 else
2652 {
2653 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
2654 rel.r_info = ELF32_R_INFO (h->dynindx, R_CR16_GOT_REGREL20);
2655 rel.r_addend = 0;
2656 }
2657
2658 bfd_elf32_swap_reloca_out (output_bfd, &rel,
2659 (bfd_byte *) ((Elf32_External_Rela *) srel->contents
2660 + srel->reloc_count));
2661 ++ srel->reloc_count;
2662 }
2663
2664 if (h->needs_copy)
2665 {
2666 asection * s;
2667 Elf_Internal_Rela rel;
2668
2669 /* This symbol needs a copy reloc. Set it up. */
2670 BFD_ASSERT (h->dynindx != -1
2671 && (h->root.type == bfd_link_hash_defined
2672 || h->root.type == bfd_link_hash_defweak));
2673
2674 s = bfd_get_linker_section (dynobj, ".rela.bss");
2675 BFD_ASSERT (s != NULL);
2676
2677 rel.r_offset = (h->root.u.def.value
2678 + h->root.u.def.section->output_section->vma
2679 + h->root.u.def.section->output_offset);
2680 rel.r_info = ELF32_R_INFO (h->dynindx, R_CR16_GOT_REGREL20);
2681 rel.r_addend = 0;
2682 bfd_elf32_swap_reloca_out (output_bfd, &rel,
2683 (bfd_byte *) ((Elf32_External_Rela *) s->contents
2684 + s->reloc_count));
2685 ++ s->reloc_count;
2686 }
2687
2688 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
2689 if (h == elf_hash_table (info)->hdynamic
2690 || h == elf_hash_table (info)->hgot)
2691 sym->st_shndx = SHN_ABS;
2692
2693 return TRUE;
2694 }
2695
2696 /* Finish up the dynamic sections. */
2697
2698 static bfd_boolean
2699 _bfd_cr16_elf_finish_dynamic_sections (bfd * output_bfd,
2700 struct bfd_link_info * info)
2701 {
2702 bfd * dynobj;
2703 asection * sgot;
2704 asection * sdyn;
2705
2706 dynobj = elf_hash_table (info)->dynobj;
2707
2708 sgot = bfd_get_linker_section (dynobj, ".got.plt");
2709 BFD_ASSERT (sgot != NULL);
2710 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
2711
2712 if (elf_hash_table (info)->dynamic_sections_created)
2713 {
2714 Elf32_External_Dyn * dyncon;
2715 Elf32_External_Dyn * dynconend;
2716
2717 BFD_ASSERT (sdyn != NULL);
2718
2719 dyncon = (Elf32_External_Dyn *) sdyn->contents;
2720 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
2721
2722 for (; dyncon < dynconend; dyncon++)
2723 {
2724 Elf_Internal_Dyn dyn;
2725 const char * name;
2726 asection * s;
2727
2728 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
2729
2730 switch (dyn.d_tag)
2731 {
2732 default:
2733 break;
2734
2735 case DT_PLTGOT:
2736 name = ".got";
2737 goto get_vma;
2738
2739 case DT_JMPREL:
2740 name = ".rela.plt";
2741 get_vma:
2742 s = bfd_get_section_by_name (output_bfd, name);
2743 BFD_ASSERT (s != NULL);
2744 dyn.d_un.d_ptr = s->vma;
2745 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2746 break;
2747
2748 case DT_PLTRELSZ:
2749 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2750 BFD_ASSERT (s != NULL);
2751 dyn.d_un.d_val = s->size;
2752 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2753 break;
2754
2755 case DT_RELASZ:
2756 /* My reading of the SVR4 ABI indicates that the
2757 procedure linkage table relocs (DT_JMPREL) should be
2758 included in the overall relocs (DT_RELA). This is
2759 what Solaris does. However, UnixWare can not handle
2760 that case. Therefore, we override the DT_RELASZ entry
2761 here to make it not include the JMPREL relocs. Since
2762 the linker script arranges for .rela.plt to follow all
2763 other relocation sections, we don't have to worry
2764 about changing the DT_RELA entry. */
2765 s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2766 if (s != NULL)
2767 dyn.d_un.d_val -= s->size;
2768 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2769 break;
2770 }
2771 }
2772
2773 }
2774
2775 /* Fill in the first three entries in the global offset table. */
2776 if (sgot->size > 0)
2777 {
2778 if (sdyn == NULL)
2779 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
2780 else
2781 bfd_put_32 (output_bfd,
2782 sdyn->output_section->vma + sdyn->output_offset,
2783 sgot->contents);
2784 }
2785
2786 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
2787
2788 return TRUE;
2789 }
2790
2791 /* Given a .data.rel section and a .emreloc in-memory section, store
2792 relocation information into the .emreloc section which can be
2793 used at runtime to relocate the section. This is called by the
2794 linker when the --embedded-relocs switch is used. This is called
2795 after the add_symbols entry point has been called for all the
2796 objects, and before the final_link entry point is called. */
2797
2798 bfd_boolean
2799 bfd_cr16_elf32_create_embedded_relocs (bfd *abfd,
2800 struct bfd_link_info *info,
2801 asection *datasec,
2802 asection *relsec,
2803 char **errmsg)
2804 {
2805 Elf_Internal_Shdr *symtab_hdr;
2806 Elf_Internal_Sym *isymbuf = NULL;
2807 Elf_Internal_Rela *internal_relocs = NULL;
2808 Elf_Internal_Rela *irel, *irelend;
2809 bfd_byte *p;
2810 bfd_size_type amt;
2811
2812 BFD_ASSERT (! info->relocatable);
2813
2814 *errmsg = NULL;
2815
2816 if (datasec->reloc_count == 0)
2817 return TRUE;
2818
2819 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2820
2821 /* Get a copy of the native relocations. */
2822 internal_relocs = (_bfd_elf_link_read_relocs
2823 (abfd, datasec, NULL, NULL, info->keep_memory));
2824 if (internal_relocs == NULL)
2825 goto error_return;
2826
2827 amt = (bfd_size_type) datasec->reloc_count * 8;
2828 relsec->contents = (bfd_byte *) bfd_alloc (abfd, amt);
2829 if (relsec->contents == NULL)
2830 goto error_return;
2831
2832 p = relsec->contents;
2833
2834 irelend = internal_relocs + datasec->reloc_count;
2835 for (irel = internal_relocs; irel < irelend; irel++, p += 8)
2836 {
2837 asection *targetsec;
2838
2839 /* We are going to write a four byte longword into the runtime
2840 reloc section. The longword will be the address in the data
2841 section which must be relocated. It is followed by the name
2842 of the target section NUL-padded or truncated to 8
2843 characters. */
2844
2845 /* We can only relocate absolute longword relocs at run time. */
2846 if (!((ELF32_R_TYPE (irel->r_info) == (int) R_CR16_NUM32a)
2847 || (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_NUM32)))
2848 {
2849 *errmsg = _("unsupported reloc type");
2850 bfd_set_error (bfd_error_bad_value);
2851 goto error_return;
2852 }
2853
2854 /* Get the target section referred to by the reloc. */
2855 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
2856 {
2857 /* A local symbol. */
2858 Elf_Internal_Sym *isym;
2859
2860 /* Read this BFD's local symbols if we haven't done so already. */
2861 if (isymbuf == NULL)
2862 {
2863 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
2864 if (isymbuf == NULL)
2865 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
2866 symtab_hdr->sh_info, 0,
2867 NULL, NULL, NULL);
2868 if (isymbuf == NULL)
2869 goto error_return;
2870 }
2871
2872 isym = isymbuf + ELF32_R_SYM (irel->r_info);
2873 targetsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
2874 }
2875 else
2876 {
2877 unsigned long indx;
2878 struct elf_link_hash_entry *h;
2879
2880 /* An external symbol. */
2881 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
2882 h = elf_sym_hashes (abfd)[indx];
2883 BFD_ASSERT (h != NULL);
2884 if (h->root.type == bfd_link_hash_defined
2885 || h->root.type == bfd_link_hash_defweak)
2886 targetsec = h->root.u.def.section;
2887 else
2888 targetsec = NULL;
2889 }
2890
2891 bfd_put_32 (abfd, irel->r_offset + datasec->output_offset, p);
2892 memset (p + 4, 0, 4);
2893 if ((ELF32_R_TYPE (irel->r_info) == (int) R_CR16_NUM32a)
2894 && (targetsec != NULL) )
2895 strncpy ((char *) p + 4, targetsec->output_section->name, 4);
2896 }
2897
2898 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
2899 free (isymbuf);
2900 if (internal_relocs != NULL
2901 && elf_section_data (datasec)->relocs != internal_relocs)
2902 free (internal_relocs);
2903 return TRUE;
2904
2905 error_return:
2906 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
2907 free (isymbuf);
2908 if (internal_relocs != NULL
2909 && elf_section_data (datasec)->relocs != internal_relocs)
2910 free (internal_relocs);
2911 return FALSE;
2912 }
2913
2914
2915 /* Classify relocation types, such that combreloc can sort them
2916 properly. */
2917
2918 static enum elf_reloc_type_class
2919 _bfd_cr16_elf_reloc_type_class (const Elf_Internal_Rela *rela)
2920 {
2921 switch ((int) ELF32_R_TYPE (rela->r_info))
2922 {
2923 case R_CR16_GOT_REGREL20:
2924 case R_CR16_GOTC_REGREL20:
2925 return reloc_class_relative;
2926 default:
2927 return reloc_class_normal;
2928 }
2929 }
2930
2931 /* Definitions for setting CR16 target vector. */
2932 #define TARGET_LITTLE_SYM bfd_elf32_cr16_vec
2933 #define TARGET_LITTLE_NAME "elf32-cr16"
2934 #define ELF_ARCH bfd_arch_cr16
2935 #define ELF_MACHINE_CODE EM_CR16
2936 #define ELF_MACHINE_ALT1 EM_CR16_OLD
2937 #define ELF_MAXPAGESIZE 0x1
2938 #define elf_symbol_leading_char '_'
2939
2940 #define bfd_elf32_bfd_reloc_type_lookup elf_cr16_reloc_type_lookup
2941 #define bfd_elf32_bfd_reloc_name_lookup elf_cr16_reloc_name_lookup
2942 #define elf_info_to_howto elf_cr16_info_to_howto
2943 #define elf_info_to_howto_rel 0
2944 #define elf_backend_relocate_section elf32_cr16_relocate_section
2945 #define bfd_elf32_bfd_relax_section elf32_cr16_relax_section
2946 #define bfd_elf32_bfd_get_relocated_section_contents \
2947 elf32_cr16_get_relocated_section_contents
2948 #define elf_backend_gc_mark_hook elf32_cr16_gc_mark_hook
2949 #define elf_backend_gc_sweep_hook elf32_cr16_gc_sweep_hook
2950 #define elf_backend_can_gc_sections 1
2951 #define elf_backend_rela_normal 1
2952 #define elf_backend_check_relocs cr16_elf_check_relocs
2953 /* So we can set bits in e_flags. */
2954 #define elf_backend_final_write_processing \
2955 _bfd_cr16_elf_final_write_processing
2956 #define elf_backend_object_p _bfd_cr16_elf_object_p
2957
2958 #define bfd_elf32_bfd_merge_private_bfd_data \
2959 _bfd_cr16_elf_merge_private_bfd_data
2960
2961
2962 #define bfd_elf32_bfd_link_hash_table_create \
2963 elf32_cr16_link_hash_table_create
2964
2965 #define elf_backend_create_dynamic_sections \
2966 _bfd_cr16_elf_create_dynamic_sections
2967 #define elf_backend_adjust_dynamic_symbol \
2968 _bfd_cr16_elf_adjust_dynamic_symbol
2969 #define elf_backend_size_dynamic_sections \
2970 _bfd_cr16_elf_size_dynamic_sections
2971 #define elf_backend_omit_section_dynsym \
2972 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
2973 #define elf_backend_finish_dynamic_symbol \
2974 _bfd_cr16_elf_finish_dynamic_symbol
2975 #define elf_backend_finish_dynamic_sections \
2976 _bfd_cr16_elf_finish_dynamic_sections
2977
2978 #define elf_backend_reloc_type_class _bfd_cr16_elf_reloc_type_class
2979
2980
2981 #define elf_backend_want_got_plt 1
2982 #define elf_backend_plt_readonly 1
2983 #define elf_backend_want_plt_sym 0
2984 #define elf_backend_got_header_size 12
2985
2986 #include "elf32-target.h"