?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Do not create $(bfdlibdir) and $(bfdincludedir) if !INSTALL_LIBBFD.
[binutils.git] / bfd / elf32-bfin.c
blob3eb749952d92a0b0f27d07f8630f36dac4f05065
1 /* ADI Blackfin BFD support for 32-bit ELF.
2 Copyright 2005, 2006, 2007 Free Software Foundation, Inc.
3
4 This file is part of BFD, the Binary File Descriptor library.
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
20
21 #include "sysdep.h"
22 #include "bfd.h"
23 #include "libbfd.h"
24 #include "elf-bfd.h"
25 #include "elf/bfin.h"
26 #include "dwarf2.h"
27 #include "hashtab.h"
28
29 /* FUNCTION : bfin_pltpc_reloc
30 ABSTRACT : TODO : figure out how to handle pltpc relocs. */
31 static bfd_reloc_status_type
32 bfin_pltpc_reloc (
33 bfd *abfd ATTRIBUTE_UNUSED,
34 arelent *reloc_entry ATTRIBUTE_UNUSED,
35 asymbol *symbol ATTRIBUTE_UNUSED,
36 PTR data ATTRIBUTE_UNUSED,
37 asection *input_section ATTRIBUTE_UNUSED,
38 bfd *output_bfd ATTRIBUTE_UNUSED,
39 char **error_message ATTRIBUTE_UNUSED)
40 {
41 bfd_reloc_status_type flag = bfd_reloc_ok;
42 return flag;
43 }
44 \f
45
46 static bfd_reloc_status_type
47 bfin_pcrel24_reloc (bfd *abfd,
48 arelent *reloc_entry,
49 asymbol *symbol,
50 PTR data,
51 asection *input_section,
52 bfd *output_bfd,
53 char **error_message ATTRIBUTE_UNUSED)
54 {
55 bfd_vma relocation;
56 bfd_size_type addr = reloc_entry->address;
57 bfd_vma output_base = 0;
58 reloc_howto_type *howto = reloc_entry->howto;
59 asection *output_section;
60 bfd_boolean relocatable = (output_bfd != NULL);
61
62 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
63 return bfd_reloc_outofrange;
64
65 if (bfd_is_und_section (symbol->section)
66 && (symbol->flags & BSF_WEAK) == 0
67 && !relocatable)
68 return bfd_reloc_undefined;
69
70 if (bfd_is_com_section (symbol->section))
71 relocation = 0;
72 else
73 relocation = symbol->value;
74
75 output_section = symbol->section->output_section;
76
77 if (relocatable)
78 output_base = 0;
79 else
80 output_base = output_section->vma;
81
82 if (!relocatable || !strcmp (symbol->name, symbol->section->name))
83 relocation += output_base + symbol->section->output_offset;
84
85 if (!relocatable && !strcmp (symbol->name, symbol->section->name))
86 relocation += reloc_entry->addend;
87
88 relocation -= input_section->output_section->vma + input_section->output_offset;
89 relocation -= reloc_entry->address;
90
91 if (howto->complain_on_overflow != complain_overflow_dont)
92 {
93 bfd_reloc_status_type status;
94 status = bfd_check_overflow (howto->complain_on_overflow,
95 howto->bitsize,
96 howto->rightshift,
97 bfd_arch_bits_per_address(abfd),
98 relocation);
99 if (status != bfd_reloc_ok)
100 return status;
101 }
102
103 /* if rightshift is 1 and the number odd, return error. */
104 if (howto->rightshift && (relocation & 0x01))
105 {
106 fprintf(stderr, "relocation should be even number\n");
107 return bfd_reloc_overflow;
108 }
109
110 relocation >>= (bfd_vma) howto->rightshift;
111 /* Shift everything up to where it's going to be used. */
112
113 relocation <<= (bfd_vma) howto->bitpos;
114
115 if (relocatable)
116 {
117 reloc_entry->address += input_section->output_offset;
118 reloc_entry->addend += symbol->section->output_offset;
119 }
120
121 {
122 short x;
123
124 /* We are getting reloc_entry->address 2 byte off from
125 the start of instruction. Assuming absolute postion
126 of the reloc data. But, following code had been written assuming
127 reloc address is starting at begining of instruction.
128 To compensate that I have increased the value of
129 relocation by 1 (effectively 2) and used the addr -2 instead of addr. */
130
131 relocation += 1;
132 x = bfd_get_16 (abfd, (bfd_byte *) data + addr - 2);
133 x = (x & 0xff00) | ((relocation >> 16) & 0xff);
134 bfd_put_16 (abfd, x, (unsigned char *) data + addr - 2);
135
136 x = bfd_get_16 (abfd, (bfd_byte *) data + addr);
137 x = relocation & 0xFFFF;
138 bfd_put_16 (abfd, x, (unsigned char *) data + addr );
139 }
140 return bfd_reloc_ok;
141 }
142
143 static bfd_reloc_status_type
144 bfin_imm16_reloc (bfd *abfd,
145 arelent *reloc_entry,
146 asymbol *symbol,
147 PTR data,
148 asection *input_section,
149 bfd *output_bfd,
150 char **error_message ATTRIBUTE_UNUSED)
151 {
152 bfd_vma relocation, x;
153 bfd_size_type reloc_addr = reloc_entry->address;
154 bfd_vma output_base = 0;
155 reloc_howto_type *howto = reloc_entry->howto;
156 asection *output_section;
157 bfd_boolean relocatable = (output_bfd != NULL);
158
159 /* Is the address of the relocation really within the section? */
160 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
161 return bfd_reloc_outofrange;
162
163 if (bfd_is_und_section (symbol->section)
164 && (symbol->flags & BSF_WEAK) == 0
165 && !relocatable)
166 return bfd_reloc_undefined;
167
168 output_section = symbol->section->output_section;
169 relocation = symbol->value;
170
171 /* Convert input-section-relative symbol value to absolute. */
172 if (relocatable)
173 output_base = 0;
174 else
175 output_base = output_section->vma;
176
177 if (!relocatable || !strcmp (symbol->name, symbol->section->name))
178 relocation += output_base + symbol->section->output_offset;
179
180 /* Add in supplied addend. */
181 relocation += reloc_entry->addend;
182
183 if (relocatable)
184 {
185 reloc_entry->address += input_section->output_offset;
186 reloc_entry->addend += symbol->section->output_offset;
187 }
188 else
189 {
190 reloc_entry->addend = 0;
191 }
192
193 if (howto->complain_on_overflow != complain_overflow_dont)
194 {
195 bfd_reloc_status_type flag;
196 flag = bfd_check_overflow (howto->complain_on_overflow,
197 howto->bitsize,
198 howto->rightshift,
199 bfd_arch_bits_per_address(abfd),
200 relocation);
201 if (flag != bfd_reloc_ok)
202 return flag;
203 }
204
205 /* Here the variable relocation holds the final address of the
206 symbol we are relocating against, plus any addend. */
207
208 relocation >>= (bfd_vma) howto->rightshift;
209 x = relocation;
210 bfd_put_16 (abfd, x, (unsigned char *) data + reloc_addr);
211 return bfd_reloc_ok;
212 }
213
214
215 static bfd_reloc_status_type
216 bfin_byte4_reloc (bfd *abfd,
217 arelent *reloc_entry,
218 asymbol *symbol,
219 PTR data,
220 asection *input_section,
221 bfd *output_bfd,
222 char **error_message ATTRIBUTE_UNUSED)
223 {
224 bfd_vma relocation, x;
225 bfd_size_type addr = reloc_entry->address;
226 bfd_vma output_base = 0;
227 asection *output_section;
228 bfd_boolean relocatable = (output_bfd != NULL);
229
230 /* Is the address of the relocation really within the section? */
231 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
232 return bfd_reloc_outofrange;
233
234 if (bfd_is_und_section (symbol->section)
235 && (symbol->flags & BSF_WEAK) == 0
236 && !relocatable)
237 return bfd_reloc_undefined;
238
239 output_section = symbol->section->output_section;
240 relocation = symbol->value;
241 /* Convert input-section-relative symbol value to absolute. */
242 if (relocatable)
243 output_base = 0;
244 else
245 output_base = output_section->vma;
246
247 if ((symbol->name
248 && symbol->section->name
249 && !strcmp (symbol->name, symbol->section->name))
250 || !relocatable)
251 {
252 relocation += output_base + symbol->section->output_offset;
253 }
254
255 relocation += reloc_entry->addend;
256
257 if (relocatable)
258 {
259 /* This output will be relocatable ... like ld -r. */
260 reloc_entry->address += input_section->output_offset;
261 reloc_entry->addend += symbol->section->output_offset;
262 }
263 else
264 {
265 reloc_entry->addend = 0;
266 }
267
268 /* Here the variable relocation holds the final address of the
269 symbol we are relocating against, plus any addend. */
270 x = relocation & 0xFFFF0000;
271 x >>=16;
272 bfd_put_16 (abfd, x, (unsigned char *) data + addr + 2);
273
274 x = relocation & 0x0000FFFF;
275 bfd_put_16 (abfd, x, (unsigned char *) data + addr);
276 return bfd_reloc_ok;
277 }
278
279 /* bfin_bfd_reloc handles the blackfin arithmetic relocations.
280 Use this instead of bfd_perform_relocation. */
281 static bfd_reloc_status_type
282 bfin_bfd_reloc (bfd *abfd,
283 arelent *reloc_entry,
284 asymbol *symbol,
285 PTR data,
286 asection *input_section,
287 bfd *output_bfd,
288 char **error_message ATTRIBUTE_UNUSED)
289 {
290 bfd_vma relocation;
291 bfd_size_type addr = reloc_entry->address;
292 bfd_vma output_base = 0;
293 reloc_howto_type *howto = reloc_entry->howto;
294 asection *output_section;
295 bfd_boolean relocatable = (output_bfd != NULL);
296
297 /* Is the address of the relocation really within the section? */
298 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
299 return bfd_reloc_outofrange;
300
301 if (bfd_is_und_section (symbol->section)
302 && (symbol->flags & BSF_WEAK) == 0
303 && !relocatable)
304 return bfd_reloc_undefined;
305
306 /* Get symbol value. (Common symbols are special.) */
307 if (bfd_is_com_section (symbol->section))
308 relocation = 0;
309 else
310 relocation = symbol->value;
311
312 output_section = symbol->section->output_section;
313
314 /* Convert input-section-relative symbol value to absolute. */
315 if (relocatable)
316 output_base = 0;
317 else
318 output_base = output_section->vma;
319
320 if (!relocatable || !strcmp (symbol->name, symbol->section->name))
321 relocation += output_base + symbol->section->output_offset;
322
323 if (!relocatable && !strcmp (symbol->name, symbol->section->name))
324 {
325 /* Add in supplied addend. */
326 relocation += reloc_entry->addend;
327 }
328
329 /* Here the variable relocation holds the final address of the
330 symbol we are relocating against, plus any addend. */
331
332 if (howto->pc_relative == TRUE)
333 {
334 relocation -= input_section->output_section->vma + input_section->output_offset;
335
336 if (howto->pcrel_offset == TRUE)
337 relocation -= reloc_entry->address;
338 }
339
340 if (relocatable)
341 {
342 reloc_entry->address += input_section->output_offset;
343 reloc_entry->addend += symbol->section->output_offset;
344 }
345
346 if (howto->complain_on_overflow != complain_overflow_dont)
347 {
348 bfd_reloc_status_type status;
349
350 status = bfd_check_overflow (howto->complain_on_overflow,
351 howto->bitsize,
352 howto->rightshift,
353 bfd_arch_bits_per_address(abfd),
354 relocation);
355 if (status != bfd_reloc_ok)
356 return status;
357 }
358
359 /* If rightshift is 1 and the number odd, return error. */
360 if (howto->rightshift && (relocation & 0x01))
361 {
362 fprintf(stderr, "relocation should be even number\n");
363 return bfd_reloc_overflow;
364 }
365
366 relocation >>= (bfd_vma) howto->rightshift;
367
368 /* Shift everything up to where it's going to be used. */
369
370 relocation <<= (bfd_vma) howto->bitpos;
371
372 #define DOIT(x) \
373 x = ( (x & ~howto->dst_mask) | (relocation & howto->dst_mask))
374
375 /* handle 8 and 16 bit relocations here. */
376 switch (howto->size)
377 {
378 case 0:
379 {
380 char x = bfd_get_8 (abfd, (char *) data + addr);
381 DOIT (x);
382 bfd_put_8 (abfd, x, (unsigned char *) data + addr);
383 }
384 break;
385
386 case 1:
387 {
388 unsigned short x = bfd_get_16 (abfd, (bfd_byte *) data + addr);
389 DOIT (x);
390 bfd_put_16 (abfd, (bfd_vma) x, (unsigned char *) data + addr);
391 }
392 break;
393
394 default:
395 return bfd_reloc_other;
396 }
397
398 return bfd_reloc_ok;
399 }
400
401 /* HOWTO Table for blackfin.
402 Blackfin relocations are fairly complicated.
403 Some of the salient features are
404 a. Even numbered offsets. A number of (not all) relocations are
405 even numbered. This means that the rightmost bit is not stored.
406 Needs to right shift by 1 and check to see if value is not odd
407 b. A relocation can be an expression. An expression takes on
408 a variety of relocations arranged in a stack.
409 As a result, we cannot use the standard generic function as special
410 function. We will have our own, which is very similar to the standard
411 generic function except that it understands how to get the value from
412 the relocation stack. . */
413
414 #define BFIN_RELOC_MIN 0
415 #define BFIN_RELOC_MAX 0x21
416 #define BFIN_GNUEXT_RELOC_MIN 0x40
417 #define BFIN_GNUEXT_RELOC_MAX 0x43
418 #define BFIN_ARELOC_MIN 0xE0
419 #define BFIN_ARELOC_MAX 0xF3
420
421 static reloc_howto_type bfin_howto_table [] =
422 {
423 /* This reloc does nothing. . */
424 HOWTO (R_BFIN_UNUSED0, /* type. */
425 0, /* rightshift. */
426 2, /* size (0 = byte, 1 = short, 2 = long). */
427 32, /* bitsize. */
428 FALSE, /* pc_relative. */
429 0, /* bitpos. */
430 complain_overflow_bitfield, /* complain_on_overflow. */
431 bfd_elf_generic_reloc, /* special_function. */
432 "R_BFIN_UNUSED0", /* name. */
433 FALSE, /* partial_inplace. */
434 0, /* src_mask. */
435 0, /* dst_mask. */
436 FALSE), /* pcrel_offset. */
437
438 HOWTO (R_BFIN_PCREL5M2, /* type. */
439 1, /* rightshift. */
440 1, /* size (0 = byte, 1 = short, 2 = long).. */
441 4, /* bitsize. */
442 TRUE, /* pc_relative. */
443 0, /* bitpos. */
444 complain_overflow_unsigned, /* complain_on_overflow. */
445 bfin_bfd_reloc, /* special_function. */
446 "R_BFIN_PCREL5M2", /* name. */
447 FALSE, /* partial_inplace. */
448 0, /* src_mask. */
449 0x0000000F, /* dst_mask. */
450 FALSE), /* pcrel_offset. */
451
452 HOWTO (R_BFIN_UNUSED1, /* type. */
453 0, /* rightshift. */
454 2, /* size (0 = byte, 1 = short, 2 = long). */
455 32, /* bitsize. */
456 FALSE, /* pc_relative. */
457 0, /* bitpos. */
458 complain_overflow_bitfield, /* complain_on_overflow. */
459 bfd_elf_generic_reloc, /* special_function. */
460 "R_BFIN_UNUSED1", /* name. */
461 FALSE, /* partial_inplace. */
462 0, /* src_mask. */
463 0, /* dst_mask. */
464 FALSE), /* pcrel_offset. */
465
466 HOWTO (R_BFIN_PCREL10, /* type. */
467 1, /* rightshift. */
468 1, /* size (0 = byte, 1 = short, 2 = long). */
469 10, /* bitsize. */
470 TRUE, /* pc_relative. */
471 0, /* bitpos. */
472 complain_overflow_signed, /* complain_on_overflow. */
473 bfin_bfd_reloc, /* special_function. */
474 "R_BFIN_PCREL10", /* name. */
475 FALSE, /* partial_inplace. */
476 0, /* src_mask. */
477 0x000003FF, /* dst_mask. */
478 TRUE), /* pcrel_offset. */
479
480 HOWTO (R_BFIN_PCREL12_JUMP, /* type. */
481 1, /* rightshift. */
482 /* the offset is actually 13 bit
483 aligned on a word boundary so
484 only 12 bits have to be used.
485 Right shift the rightmost bit.. */
486 1, /* size (0 = byte, 1 = short, 2 = long). */
487 12, /* bitsize. */
488 TRUE, /* pc_relative. */
489 0, /* bitpos. */
490 complain_overflow_signed, /* complain_on_overflow. */
491 bfin_bfd_reloc, /* special_function. */
492 "R_BFIN_PCREL12_JUMP", /* name. */
493 FALSE, /* partial_inplace. */
494 0, /* src_mask. */
495 0x0FFF, /* dst_mask. */
496 TRUE), /* pcrel_offset. */
497
498 HOWTO (R_BFIN_RIMM16, /* type. */
499 0, /* rightshift. */
500 1, /* size (0 = byte, 1 = short, 2 = long). */
501 16, /* bitsize. */
502 FALSE, /* pc_relative. */
503 0, /* bitpos. */
504 complain_overflow_signed, /* complain_on_overflow. */
505 bfin_imm16_reloc, /* special_function. */
506 "R_BFIN_RIMM16", /* name. */
507 FALSE, /* partial_inplace. */
508 0, /* src_mask. */
509 0x0000FFFF, /* dst_mask. */
510 TRUE), /* pcrel_offset. */
511
512 HOWTO (R_BFIN_LUIMM16, /* type. */
513 0, /* rightshift. */
514 1, /* size (0 = byte, 1 = short, 2 = long). */
515 16, /* bitsize. */
516 FALSE, /* pc_relative. */
517 0, /* bitpos. */
518 complain_overflow_dont, /* complain_on_overflow. */
519 bfin_imm16_reloc, /* special_function. */
520 "R_BFIN_LUIMM16", /* name. */
521 FALSE, /* partial_inplace. */
522 0, /* src_mask. */
523 0x0000FFFF, /* dst_mask. */
524 TRUE), /* pcrel_offset. */
525
526 HOWTO (R_BFIN_HUIMM16, /* type. */
527 16, /* rightshift. */
528 1, /* size (0 = byte, 1 = short, 2 = long). */
529 16, /* bitsize. */
530 FALSE, /* pc_relative. */
531 0, /* bitpos. */
532 complain_overflow_unsigned, /* complain_on_overflow. */
533 bfin_imm16_reloc, /* special_function. */
534 "R_BFIN_HUIMM16", /* name. */
535 FALSE, /* partial_inplace. */
536 0, /* src_mask. */
537 0x0000FFFF, /* dst_mask. */
538 TRUE), /* pcrel_offset. */
539
540 HOWTO (R_BFIN_PCREL12_JUMP_S, /* type. */
541 1, /* rightshift. */
542 1, /* size (0 = byte, 1 = short, 2 = long). */
543 12, /* bitsize. */
544 TRUE, /* pc_relative. */
545 0, /* bitpos. */
546 complain_overflow_signed, /* complain_on_overflow. */
547 bfin_bfd_reloc, /* special_function. */
548 "R_BFIN_PCREL12_JUMP_S", /* name. */
549 FALSE, /* partial_inplace. */
550 0, /* src_mask. */
551 0x00000FFF, /* dst_mask. */
552 TRUE), /* pcrel_offset. */
553
554 HOWTO (R_BFIN_PCREL24_JUMP_X, /* type. */
555 1, /* rightshift. */
556 2, /* size (0 = byte, 1 = short, 2 = long). */
557 24, /* bitsize. */
558 TRUE, /* pc_relative. */
559 0, /* bitpos. */
560 complain_overflow_signed, /* complain_on_overflow. */
561 bfin_pcrel24_reloc, /* special_function. */
562 "R_BFIN_PCREL24_JUMP_X", /* name. */
563 FALSE, /* partial_inplace. */
564 0, /* src_mask. */
565 0x00FFFFFF, /* dst_mask. */
566 TRUE), /* pcrel_offset. */
567
568 HOWTO (R_BFIN_PCREL24, /* type. */
569 1, /* rightshift. */
570 2, /* size (0 = byte, 1 = short, 2 = long). */
571 24, /* bitsize. */
572 TRUE, /* pc_relative. */
573 0, /* bitpos. */
574 complain_overflow_signed, /* complain_on_overflow. */
575 bfin_pcrel24_reloc, /* special_function. */
576 "R_BFIN_PCREL24", /* name. */
577 FALSE, /* partial_inplace. */
578 0, /* src_mask. */
579 0x00FFFFFF, /* dst_mask. */
580 TRUE), /* pcrel_offset. */
581
582 HOWTO (R_BFIN_UNUSEDB, /* type. */
583 0, /* rightshift. */
584 2, /* size (0 = byte, 1 = short, 2 = long). */
585 32, /* bitsize. */
586 FALSE, /* pc_relative. */
587 0, /* bitpos. */
588 complain_overflow_dont, /* complain_on_overflow. */
589 bfd_elf_generic_reloc, /* special_function. */
590 "R_BFIN_UNUSEDB", /* name. */
591 FALSE, /* partial_inplace. */
592 0, /* src_mask. */
593 0, /* dst_mask. */
594 FALSE), /* pcrel_offset. */
595
596 HOWTO (R_BFIN_UNUSEDC, /* type. */
597 0, /* rightshift. */
598 2, /* size (0 = byte, 1 = short, 2 = long). */
599 32, /* bitsize. */
600 FALSE, /* pc_relative. */
601 0, /* bitpos. */
602 complain_overflow_dont, /* complain_on_overflow. */
603 bfd_elf_generic_reloc, /* special_function. */
604 "R_BFIN_UNUSEDC", /* name. */
605 FALSE, /* partial_inplace. */
606 0, /* src_mask. */
607 0, /* dst_mask. */
608 FALSE), /* pcrel_offset. */
609
610 HOWTO (R_BFIN_PCREL24_JUMP_L, /* type. */
611 1, /* rightshift. */
612 2, /* size (0 = byte, 1 = short, 2 = long). */
613 24, /* bitsize. */
614 TRUE, /* pc_relative. */
615 0, /* bitpos. */
616 complain_overflow_signed, /* complain_on_overflow. */
617 bfin_pcrel24_reloc, /* special_function. */
618 "R_BFIN_PCREL24_JUMP_L", /* name. */
619 FALSE, /* partial_inplace. */
620 0, /* src_mask. */
621 0x00FFFFFF, /* dst_mask. */
622 TRUE), /* pcrel_offset. */
623
624 HOWTO (R_BFIN_PCREL24_CALL_X, /* type. */
625 1, /* rightshift. */
626 2, /* size (0 = byte, 1 = short, 2 = long). */
627 24, /* bitsize. */
628 TRUE, /* pc_relative. */
629 0, /* bitpos. */
630 complain_overflow_signed, /* complain_on_overflow. */
631 bfin_pcrel24_reloc, /* special_function. */
632 "R_BFIN_PCREL24_CALL_X", /* name. */
633 FALSE, /* partial_inplace. */
634 0, /* src_mask. */
635 0x00FFFFFF, /* dst_mask. */
636 TRUE), /* pcrel_offset. */
637
638 HOWTO (R_BFIN_VAR_EQ_SYMB, /* type. */
639 0, /* rightshift. */
640 2, /* size (0 = byte, 1 = short, 2 = long). */
641 32, /* bitsize. */
642 FALSE, /* pc_relative. */
643 0, /* bitpos. */
644 complain_overflow_bitfield, /* complain_on_overflow. */
645 bfin_bfd_reloc, /* special_function. */
646 "R_BFIN_VAR_EQ_SYMB", /* name. */
647 FALSE, /* partial_inplace. */
648 0, /* src_mask. */
649 0, /* dst_mask. */
650 FALSE), /* pcrel_offset. */
651
652 HOWTO (R_BFIN_BYTE_DATA, /* type. */
653 0, /* rightshift. */
654 0, /* size (0 = byte, 1 = short, 2 = long). */
655 8, /* bitsize. */
656 FALSE, /* pc_relative. */
657 0, /* bitpos. */
658 complain_overflow_unsigned, /* complain_on_overflow. */
659 bfin_bfd_reloc, /* special_function. */
660 "R_BFIN_BYTE_DATA", /* name. */
661 FALSE, /* partial_inplace. */
662 0, /* src_mask. */
663 0xFF, /* dst_mask. */
664 TRUE), /* pcrel_offset. */
665
666 HOWTO (R_BFIN_BYTE2_DATA, /* type. */
667 0, /* rightshift. */
668 1, /* size (0 = byte, 1 = short, 2 = long). */
669 16, /* bitsize. */
670 FALSE, /* pc_relative. */
671 0, /* bitpos. */
672 complain_overflow_signed, /* complain_on_overflow. */
673 bfin_bfd_reloc, /* special_function. */
674 "R_BFIN_BYTE2_DATA", /* name. */
675 FALSE, /* partial_inplace. */
676 0, /* src_mask. */
677 0xFFFF, /* dst_mask. */
678 TRUE), /* pcrel_offset. */
679
680 HOWTO (R_BFIN_BYTE4_DATA, /* type. */
681 0, /* rightshift. */
682 2, /* size (0 = byte, 1 = short, 2 = long). */
683 32, /* bitsize. */
684 FALSE, /* pc_relative. */
685 0, /* bitpos. */
686 complain_overflow_unsigned, /* complain_on_overflow. */
687 bfin_byte4_reloc, /* special_function. */
688 "R_BFIN_BYTE4_DATA", /* name. */
689 FALSE, /* partial_inplace. */
690 0, /* src_mask. */
691 0xFFFFFFFF, /* dst_mask. */
692 TRUE), /* pcrel_offset. */
693
694 HOWTO (R_BFIN_PCREL11, /* type. */
695 1, /* rightshift. */
696 1, /* size (0 = byte, 1 = short, 2 = long). */
697 10, /* bitsize. */
698 TRUE, /* pc_relative. */
699 0, /* bitpos. */
700 complain_overflow_unsigned, /* complain_on_overflow. */
701 bfin_bfd_reloc, /* special_function. */
702 "R_BFIN_PCREL11", /* name. */
703 FALSE, /* partial_inplace. */
704 0, /* src_mask. */
705 0x000003FF, /* dst_mask. */
706 FALSE), /* pcrel_offset. */
707
708
709 /* A 18-bit signed operand with the GOT offset for the address of
710 the symbol. */
711 HOWTO (R_BFIN_GOT17M4, /* type */
712 2, /* rightshift */
713 1, /* size (0 = byte, 1 = short, 2 = long) */
714 16, /* bitsize */
715 FALSE, /* pc_relative */
716 0, /* bitpos */
717 complain_overflow_signed, /* complain_on_overflow */
718 bfd_elf_generic_reloc, /* special_function */
719 "R_BFIN_GOT17M4", /* name */
720 FALSE, /* partial_inplace */
721 0xffff, /* src_mask */
722 0xffff, /* dst_mask */
723 FALSE), /* pcrel_offset */
724
725 /* The upper 16 bits of the GOT offset for the address of the
726 symbol. */
727 HOWTO (R_BFIN_GOTHI, /* type */
728 0, /* rightshift */
729 1, /* size (0 = byte, 1 = short, 2 = long) */
730 16, /* bitsize */
731 FALSE, /* pc_relative */
732 0, /* bitpos */
733 complain_overflow_dont, /* complain_on_overflow */
734 bfd_elf_generic_reloc, /* special_function */
735 "R_BFIN_GOTHI", /* name */
736 FALSE, /* partial_inplace */
737 0xffff, /* src_mask */
738 0xffff, /* dst_mask */
739 FALSE), /* pcrel_offset */
740
741 /* The lower 16 bits of the GOT offset for the address of the
742 symbol. */
743 HOWTO (R_BFIN_GOTLO, /* type */
744 0, /* rightshift */
745 1, /* size (0 = byte, 1 = short, 2 = long) */
746 16, /* bitsize */
747 FALSE, /* pc_relative */
748 0, /* bitpos */
749 complain_overflow_dont, /* complain_on_overflow */
750 bfd_elf_generic_reloc, /* special_function */
751 "R_BFIN_GOTLO", /* name */
752 FALSE, /* partial_inplace */
753 0xffff, /* src_mask */
754 0xffff, /* dst_mask */
755 FALSE), /* pcrel_offset */
756
757 /* The 32-bit address of the canonical descriptor of a function. */
758 HOWTO (R_BFIN_FUNCDESC, /* type */
759 0, /* rightshift */
760 2, /* size (0 = byte, 1 = short, 2 = long) */
761 32, /* bitsize */
762 FALSE, /* pc_relative */
763 0, /* bitpos */
764 complain_overflow_bitfield, /* complain_on_overflow */
765 bfd_elf_generic_reloc, /* special_function */
766 "R_BFIN_FUNCDESC", /* name */
767 FALSE, /* partial_inplace */
768 0xffffffff, /* src_mask */
769 0xffffffff, /* dst_mask */
770 FALSE), /* pcrel_offset */
771
772 /* A 12-bit signed operand with the GOT offset for the address of
773 canonical descriptor of a function. */
774 HOWTO (R_BFIN_FUNCDESC_GOT17M4, /* type */
775 2, /* rightshift */
776 1, /* size (0 = byte, 1 = short, 2 = long) */
777 16, /* bitsize */
778 FALSE, /* pc_relative */
779 0, /* bitpos */
780 complain_overflow_signed, /* complain_on_overflow */
781 bfd_elf_generic_reloc, /* special_function */
782 "R_BFIN_FUNCDESC_GOT17M4", /* name */
783 FALSE, /* partial_inplace */
784 0xffff, /* src_mask */
785 0xffff, /* dst_mask */
786 FALSE), /* pcrel_offset */
787
788 /* The upper 16 bits of the GOT offset for the address of the
789 canonical descriptor of a function. */
790 HOWTO (R_BFIN_FUNCDESC_GOTHI, /* type */
791 0, /* rightshift */
792 1, /* size (0 = byte, 1 = short, 2 = long) */
793 16, /* bitsize */
794 FALSE, /* pc_relative */
795 0, /* bitpos */
796 complain_overflow_dont, /* complain_on_overflow */
797 bfd_elf_generic_reloc, /* special_function */
798 "R_BFIN_FUNCDESC_GOTHI", /* name */
799 FALSE, /* partial_inplace */
800 0xffff, /* src_mask */
801 0xffff, /* dst_mask */
802 FALSE), /* pcrel_offset */
803
804 /* The lower 16 bits of the GOT offset for the address of the
805 canonical descriptor of a function. */
806 HOWTO (R_BFIN_FUNCDESC_GOTLO, /* type */
807 0, /* rightshift */
808 1, /* size (0 = byte, 1 = short, 2 = long) */
809 16, /* bitsize */
810 FALSE, /* pc_relative */
811 0, /* bitpos */
812 complain_overflow_dont, /* complain_on_overflow */
813 bfd_elf_generic_reloc, /* special_function */
814 "R_BFIN_FUNCDESC_GOTLO", /* name */
815 FALSE, /* partial_inplace */
816 0xffff, /* src_mask */
817 0xffff, /* dst_mask */
818 FALSE), /* pcrel_offset */
819
820 /* The 32-bit address of the canonical descriptor of a function. */
821 HOWTO (R_BFIN_FUNCDESC_VALUE, /* type */
822 0, /* rightshift */
823 2, /* size (0 = byte, 1 = short, 2 = long) */
824 64, /* bitsize */
825 FALSE, /* pc_relative */
826 0, /* bitpos */
827 complain_overflow_bitfield, /* complain_on_overflow */
828 bfd_elf_generic_reloc, /* special_function */
829 "R_BFIN_FUNCDESC_VALUE", /* name */
830 FALSE, /* partial_inplace */
831 0xffffffff, /* src_mask */
832 0xffffffff, /* dst_mask */
833 FALSE), /* pcrel_offset */
834
835 /* A 12-bit signed operand with the GOT offset for the address of
836 canonical descriptor of a function. */
837 HOWTO (R_BFIN_FUNCDESC_GOTOFF17M4, /* type */
838 2, /* rightshift */
839 1, /* size (0 = byte, 1 = short, 2 = long) */
840 16, /* bitsize */
841 FALSE, /* pc_relative */
842 0, /* bitpos */
843 complain_overflow_signed, /* complain_on_overflow */
844 bfd_elf_generic_reloc, /* special_function */
845 "R_BFIN_FUNCDESC_GOTOFF17M4", /* name */
846 FALSE, /* partial_inplace */
847 0xffff, /* src_mask */
848 0xffff, /* dst_mask */
849 FALSE), /* pcrel_offset */
850
851 /* The upper 16 bits of the GOT offset for the address of the
852 canonical descriptor of a function. */
853 HOWTO (R_BFIN_FUNCDESC_GOTOFFHI, /* type */
854 0, /* rightshift */
855 1, /* size (0 = byte, 1 = short, 2 = long) */
856 16, /* bitsize */
857 FALSE, /* pc_relative */
858 0, /* bitpos */
859 complain_overflow_dont, /* complain_on_overflow */
860 bfd_elf_generic_reloc, /* special_function */
861 "R_BFIN_FUNCDESC_GOTOFFHI", /* name */
862 FALSE, /* partial_inplace */
863 0xffff, /* src_mask */
864 0xffff, /* dst_mask */
865 FALSE), /* pcrel_offset */
866
867 /* The lower 16 bits of the GOT offset for the address of the
868 canonical descriptor of a function. */
869 HOWTO (R_BFIN_FUNCDESC_GOTOFFLO, /* type */
870 0, /* rightshift */
871 1, /* size (0 = byte, 1 = short, 2 = long) */
872 16, /* bitsize */
873 FALSE, /* pc_relative */
874 0, /* bitpos */
875 complain_overflow_dont, /* complain_on_overflow */
876 bfd_elf_generic_reloc, /* special_function */
877 "R_BFIN_FUNCDESC_GOTOFFLO", /* name */
878 FALSE, /* partial_inplace */
879 0xffff, /* src_mask */
880 0xffff, /* dst_mask */
881 FALSE), /* pcrel_offset */
882
883 /* A 12-bit signed operand with the GOT offset for the address of
884 the symbol. */
885 HOWTO (R_BFIN_GOTOFF17M4, /* type */
886 2, /* rightshift */
887 1, /* size (0 = byte, 1 = short, 2 = long) */
888 16, /* bitsize */
889 FALSE, /* pc_relative */
890 0, /* bitpos */
891 complain_overflow_signed, /* complain_on_overflow */
892 bfd_elf_generic_reloc, /* special_function */
893 "R_BFIN_GOTOFF17M4", /* name */
894 FALSE, /* partial_inplace */
895 0xffff, /* src_mask */
896 0xffff, /* dst_mask */
897 FALSE), /* pcrel_offset */
898
899 /* The upper 16 bits of the GOT offset for the address of the
900 symbol. */
901 HOWTO (R_BFIN_GOTOFFHI, /* type */
902 0, /* rightshift */
903 1, /* size (0 = byte, 1 = short, 2 = long) */
904 16, /* bitsize */
905 FALSE, /* pc_relative */
906 0, /* bitpos */
907 complain_overflow_dont, /* complain_on_overflow */
908 bfd_elf_generic_reloc, /* special_function */
909 "R_BFIN_GOTOFFHI", /* name */
910 FALSE, /* partial_inplace */
911 0xffff, /* src_mask */
912 0xffff, /* dst_mask */
913 FALSE), /* pcrel_offset */
914
915 /* The lower 16 bits of the GOT offset for the address of the
916 symbol. */
917 HOWTO (R_BFIN_GOTOFFLO, /* type */
918 0, /* rightshift */
919 1, /* size (0 = byte, 1 = short, 2 = long) */
920 16, /* bitsize */
921 FALSE, /* pc_relative */
922 0, /* bitpos */
923 complain_overflow_dont, /* complain_on_overflow */
924 bfd_elf_generic_reloc, /* special_function */
925 "R_BFIN_GOTOFFLO", /* name */
926 FALSE, /* partial_inplace */
927 0xffff, /* src_mask */
928 0xffff, /* dst_mask */
929 FALSE), /* pcrel_offset */
930 };
931
932 static reloc_howto_type bfin_gnuext_howto_table [] =
933 {
934 HOWTO (R_BFIN_PLTPC, /* type. */
935 0, /* rightshift. */
936 1, /* size (0 = byte, 1 = short, 2 = long). */
937 16, /* bitsize. */
938 FALSE, /* pc_relative. */
939 0, /* bitpos. */
940 complain_overflow_bitfield, /* complain_on_overflow. */
941 bfin_pltpc_reloc, /* special_function. */
942 "R_BFIN_PLTPC", /* name. */
943 FALSE, /* partial_inplace. */
944 0xffff, /* src_mask. */
945 0xffff, /* dst_mask. */
946 FALSE), /* pcrel_offset. */
947
948 HOWTO (R_BFIN_GOT, /* type. */
949 0, /* rightshift. */
950 1, /* size (0 = byte, 1 = short, 2 = long). */
951 16, /* bitsize. */
952 FALSE, /* pc_relative. */
953 0, /* bitpos. */
954 complain_overflow_bitfield, /* complain_on_overflow. */
955 bfd_elf_generic_reloc, /* special_function. */
956 "R_BFIN_GOT", /* name. */
957 FALSE, /* partial_inplace. */
958 0x7fff, /* src_mask. */
959 0x7fff, /* dst_mask. */
960 FALSE), /* pcrel_offset. */
961
962 /* GNU extension to record C++ vtable hierarchy. */
963 HOWTO (R_BFIN_GNU_VTINHERIT, /* type. */
964 0, /* rightshift. */
965 2, /* size (0 = byte, 1 = short, 2 = long). */
966 0, /* bitsize. */
967 FALSE, /* pc_relative. */
968 0, /* bitpos. */
969 complain_overflow_dont, /* complain_on_overflow. */
970 NULL, /* special_function. */
971 "R_BFIN_GNU_VTINHERIT", /* name. */
972 FALSE, /* partial_inplace. */
973 0, /* src_mask. */
974 0, /* dst_mask. */
975 FALSE), /* pcrel_offset. */
976
977 /* GNU extension to record C++ vtable member usage. */
978 HOWTO (R_BFIN_GNU_VTENTRY, /* type. */
979 0, /* rightshift. */
980 2, /* size (0 = byte, 1 = short, 2 = long). */
981 0, /* bitsize. */
982 FALSE, /* pc_relative. */
983 0, /* bitpos. */
984 complain_overflow_dont, /* complain_on_overflow. */
985 _bfd_elf_rel_vtable_reloc_fn, /* special_function. */
986 "R_BFIN_GNU_VTENTRY", /* name. */
987 FALSE, /* partial_inplace. */
988 0, /* src_mask. */
989 0, /* dst_mask. */
990 FALSE) /* pcrel_offset. */
991 };
992
993 struct bfin_reloc_map
994 {
995 bfd_reloc_code_real_type bfd_reloc_val;
996 unsigned int bfin_reloc_val;
997 };
998
999 static const struct bfin_reloc_map bfin_reloc_map [] =
1000 {
1001 { BFD_RELOC_NONE, R_BFIN_UNUSED0 },
1002 { BFD_RELOC_BFIN_5_PCREL, R_BFIN_PCREL5M2 },
1003 { BFD_RELOC_NONE, R_BFIN_UNUSED1 },
1004 { BFD_RELOC_BFIN_10_PCREL, R_BFIN_PCREL10 },
1005 { BFD_RELOC_BFIN_12_PCREL_JUMP, R_BFIN_PCREL12_JUMP },
1006 { BFD_RELOC_BFIN_16_IMM, R_BFIN_RIMM16 },
1007 { BFD_RELOC_BFIN_16_LOW, R_BFIN_LUIMM16 },
1008 { BFD_RELOC_BFIN_16_HIGH, R_BFIN_HUIMM16 },
1009 { BFD_RELOC_BFIN_12_PCREL_JUMP_S, R_BFIN_PCREL12_JUMP_S },
1010 { BFD_RELOC_24_PCREL, R_BFIN_PCREL24 },
1011 { BFD_RELOC_24_PCREL, R_BFIN_PCREL24 },
1012 { BFD_RELOC_BFIN_24_PCREL_JUMP_L, R_BFIN_PCREL24_JUMP_L },
1013 { BFD_RELOC_NONE, R_BFIN_UNUSEDB },
1014 { BFD_RELOC_NONE, R_BFIN_UNUSEDC },
1015 { BFD_RELOC_BFIN_24_PCREL_CALL_X, R_BFIN_PCREL24_CALL_X },
1016 { BFD_RELOC_8, R_BFIN_BYTE_DATA },
1017 { BFD_RELOC_16, R_BFIN_BYTE2_DATA },
1018 { BFD_RELOC_32, R_BFIN_BYTE4_DATA },
1019 { BFD_RELOC_BFIN_11_PCREL, R_BFIN_PCREL11 },
1020 { BFD_RELOC_BFIN_GOT, R_BFIN_GOT },
1021 { BFD_RELOC_BFIN_PLTPC, R_BFIN_PLTPC },
1022
1023 { BFD_RELOC_BFIN_GOT17M4, R_BFIN_GOT17M4 },
1024 { BFD_RELOC_BFIN_GOTHI, R_BFIN_GOTHI },
1025 { BFD_RELOC_BFIN_GOTLO, R_BFIN_GOTLO },
1026 { BFD_RELOC_BFIN_FUNCDESC, R_BFIN_FUNCDESC },
1027 { BFD_RELOC_BFIN_FUNCDESC_GOT17M4, R_BFIN_FUNCDESC_GOT17M4 },
1028 { BFD_RELOC_BFIN_FUNCDESC_GOTHI, R_BFIN_FUNCDESC_GOTHI },
1029 { BFD_RELOC_BFIN_FUNCDESC_GOTLO, R_BFIN_FUNCDESC_GOTLO },
1030 { BFD_RELOC_BFIN_FUNCDESC_VALUE, R_BFIN_FUNCDESC_VALUE },
1031 { BFD_RELOC_BFIN_FUNCDESC_GOTOFF17M4, R_BFIN_FUNCDESC_GOTOFF17M4 },
1032 { BFD_RELOC_BFIN_FUNCDESC_GOTOFFHI, R_BFIN_FUNCDESC_GOTOFFHI },
1033 { BFD_RELOC_BFIN_FUNCDESC_GOTOFFLO, R_BFIN_FUNCDESC_GOTOFFLO },
1034 { BFD_RELOC_BFIN_GOTOFF17M4, R_BFIN_GOTOFF17M4 },
1035 { BFD_RELOC_BFIN_GOTOFFHI, R_BFIN_GOTOFFHI },
1036 { BFD_RELOC_BFIN_GOTOFFLO, R_BFIN_GOTOFFLO },
1037
1038 { BFD_RELOC_VTABLE_INHERIT, R_BFIN_GNU_VTINHERIT },
1039 { BFD_RELOC_VTABLE_ENTRY, R_BFIN_GNU_VTENTRY },
1040 };
1041
1042
1043 static void
1044 bfin_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
1045 arelent *cache_ptr,
1046 Elf_Internal_Rela *dst)
1047 {
1048 unsigned int r_type;
1049
1050 r_type = ELF32_R_TYPE (dst->r_info);
1051
1052 if (r_type <= BFIN_RELOC_MAX)
1053 cache_ptr->howto = &bfin_howto_table [r_type];
1054
1055 else if (r_type >= BFIN_GNUEXT_RELOC_MIN && r_type <= BFIN_GNUEXT_RELOC_MAX)
1056 cache_ptr->howto = &bfin_gnuext_howto_table [r_type - BFIN_GNUEXT_RELOC_MIN];
1057
1058 else
1059 cache_ptr->howto = (reloc_howto_type *) NULL;
1060 }
1061
1062 /* Given a BFD reloc type, return the howto. */
1063 static reloc_howto_type *
1064 bfin_bfd_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
1065 bfd_reloc_code_real_type code)
1066 {
1067 unsigned int i;
1068 unsigned int r_type = BFIN_RELOC_MIN;
1069
1070 for (i = sizeof (bfin_reloc_map) / sizeof (bfin_reloc_map[0]); --i;)
1071 if (bfin_reloc_map[i].bfd_reloc_val == code)
1072 r_type = bfin_reloc_map[i].bfin_reloc_val;
1073
1074 if (r_type <= BFIN_RELOC_MAX && r_type > BFIN_RELOC_MIN)
1075 return &bfin_howto_table [r_type];
1076
1077 else if (r_type >= BFIN_GNUEXT_RELOC_MIN && r_type <= BFIN_GNUEXT_RELOC_MAX)
1078 return &bfin_gnuext_howto_table [r_type - BFIN_GNUEXT_RELOC_MIN];
1079
1080 return (reloc_howto_type *) NULL;
1081 }
1082
1083 static reloc_howto_type *
1084 bfin_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1085 const char *r_name)
1086 {
1087 unsigned int i;
1088
1089 for (i = 0;
1090 i < (sizeof (bfin_howto_table)
1091 / sizeof (bfin_howto_table[0]));
1092 i++)
1093 if (bfin_howto_table[i].name != NULL
1094 && strcasecmp (bfin_howto_table[i].name, r_name) == 0)
1095 return &bfin_howto_table[i];
1096
1097 for (i = 0;
1098 i < (sizeof (bfin_gnuext_howto_table)
1099 / sizeof (bfin_gnuext_howto_table[0]));
1100 i++)
1101 if (bfin_gnuext_howto_table[i].name != NULL
1102 && strcasecmp (bfin_gnuext_howto_table[i].name, r_name) == 0)
1103 return &bfin_gnuext_howto_table[i];
1104
1105 return NULL;
1106 }
1107
1108 /* Given a bfin relocation type, return the howto. */
1109 static reloc_howto_type *
1110 bfin_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
1111 unsigned int r_type)
1112 {
1113 if (r_type <= BFIN_RELOC_MAX)
1114 return &bfin_howto_table [r_type];
1115
1116 else if (r_type >= BFIN_GNUEXT_RELOC_MIN && r_type <= BFIN_GNUEXT_RELOC_MAX)
1117 return &bfin_gnuext_howto_table [r_type - BFIN_GNUEXT_RELOC_MIN];
1118
1119 return (reloc_howto_type *) NULL;
1120 }
1121
1122 /* Return TRUE if the name is a local label.
1123 bfin local labels begin with L$. */
1124 static bfd_boolean
1125 bfin_is_local_label_name (
1126 bfd *abfd,
1127 const char *label)
1128 {
1129 if (label[0] == 'L' && label[1] == '$' )
1130 return TRUE;
1131
1132 return _bfd_elf_is_local_label_name (abfd, label);
1133 }
1134 \f
1135 /* Look through the relocs for a section during the first phase, and
1136 allocate space in the global offset table or procedure linkage
1137 table. */
1138
1139 static bfd_boolean
1140 bfin_check_relocs (bfd * abfd,
1141 struct bfd_link_info *info,
1142 asection *sec,
1143 const Elf_Internal_Rela *relocs)
1144 {
1145 bfd *dynobj;
1146 Elf_Internal_Shdr *symtab_hdr;
1147 struct elf_link_hash_entry **sym_hashes;
1148 bfd_signed_vma *local_got_refcounts;
1149 const Elf_Internal_Rela *rel;
1150 const Elf_Internal_Rela *rel_end;
1151 asection *sgot;
1152 asection *srelgot;
1153 if (info->relocatable)
1154 return TRUE;
1155
1156 dynobj = elf_hash_table (info)->dynobj;
1157 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1158 sym_hashes = elf_sym_hashes (abfd);
1159 local_got_refcounts = elf_local_got_refcounts (abfd);
1160
1161 sgot = NULL;
1162 srelgot = NULL;
1163
1164 rel_end = relocs + sec->reloc_count;
1165 for (rel = relocs; rel < rel_end; rel++)
1166 {
1167 unsigned long r_symndx;
1168 struct elf_link_hash_entry *h;
1169
1170 r_symndx = ELF32_R_SYM (rel->r_info);
1171 if (r_symndx < symtab_hdr->sh_info)
1172 h = NULL;
1173 else
1174 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1175
1176 switch (ELF32_R_TYPE (rel->r_info))
1177 {
1178 /* This relocation describes the C++ object vtable hierarchy.
1179 Reconstruct it for later use during GC. */
1180 case R_BFIN_GNU_VTINHERIT:
1181 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1182 return FALSE;
1183 break;
1184
1185 /* This relocation describes which C++ vtable entries
1186 are actually used. Record for later use during GC. */
1187 case R_BFIN_GNU_VTENTRY:
1188 BFD_ASSERT (h != NULL);
1189 if (h != NULL
1190 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1191 return FALSE;
1192 break;
1193
1194 case R_BFIN_GOT:
1195 if (h != NULL
1196 && strcmp (h->root.root.string, "__GLOBAL_OFFSET_TABLE_") == 0)
1197 break;
1198 /* Fall through. */
1199
1200 if (dynobj == NULL)
1201 {
1202 /* Create the .got section. */
1203 elf_hash_table (info)->dynobj = dynobj = abfd;
1204 if (!_bfd_elf_create_got_section (dynobj, info))
1205 return FALSE;
1206 }
1207
1208 if (sgot == NULL)
1209 {
1210 sgot = bfd_get_section_by_name (dynobj, ".got");
1211 BFD_ASSERT (sgot != NULL);
1212 }
1213
1214 if (srelgot == NULL && (h != NULL || info->shared))
1215 {
1216 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1217 if (srelgot == NULL)
1218 {
1219 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
1220 | SEC_IN_MEMORY | SEC_LINKER_CREATED
1221 | SEC_READONLY);
1222 srelgot = bfd_make_section_with_flags (dynobj, ".rela.got",
1223 flags);
1224 if (srelgot == NULL
1225 || !bfd_set_section_alignment (dynobj, srelgot, 2))
1226 return FALSE;
1227 }
1228 }
1229
1230 if (h != NULL)
1231 {
1232 if (h->got.refcount == 0)
1233 {
1234 /* Make sure this symbol is output as a dynamic symbol. */
1235 if (h->dynindx == -1 && !h->forced_local)
1236 {
1237 if (!bfd_elf_link_record_dynamic_symbol (info, h))
1238 return FALSE;
1239 }
1240
1241 /* Allocate space in the .got section. */
1242 sgot->size += 4;
1243 /* Allocate relocation space. */
1244 srelgot->size += sizeof (Elf32_External_Rela);
1245 }
1246 h->got.refcount++;
1247 }
1248 else
1249 {
1250 /* This is a global offset table entry for a local symbol. */
1251 if (local_got_refcounts == NULL)
1252 {
1253 bfd_size_type size;
1254
1255 size = symtab_hdr->sh_info;
1256 size *= sizeof (bfd_signed_vma);
1257 local_got_refcounts = ((bfd_signed_vma *)
1258 bfd_zalloc (abfd, size));
1259 if (local_got_refcounts == NULL)
1260 return FALSE;
1261 elf_local_got_refcounts (abfd) = local_got_refcounts;
1262 }
1263 if (local_got_refcounts[r_symndx] == 0)
1264 {
1265 sgot->size += 4;
1266 if (info->shared)
1267 {
1268 /* If we are generating a shared object, we need to
1269 output a R_68K_RELATIVE reloc so that the dynamic
1270 linker can adjust this GOT entry. */
1271 srelgot->size += sizeof (Elf32_External_Rela);
1272 }
1273 }
1274 local_got_refcounts[r_symndx]++;
1275 }
1276 break;
1277
1278 default:
1279 break;
1280 }
1281 }
1282
1283 return TRUE;
1284 }
1285
1286 static enum elf_reloc_type_class
1287 elf32_bfin_reloc_type_class (const Elf_Internal_Rela * rela)
1288 {
1289 switch ((int) ELF32_R_TYPE (rela->r_info))
1290 {
1291 default:
1292 return reloc_class_normal;
1293 }
1294 }
1295 \f
1296 static bfd_reloc_status_type
1297 bfin_final_link_relocate (Elf_Internal_Rela *rel, reloc_howto_type *howto,
1298 bfd *input_bfd, asection *input_section,
1299 bfd_byte *contents, bfd_vma address,
1300 bfd_vma value, bfd_vma addend)
1301 {
1302 int r_type = ELF32_R_TYPE (rel->r_info);
1303
1304 if (r_type == R_BFIN_PCREL24 || r_type == R_BFIN_PCREL24_JUMP_L)
1305 {
1306 bfd_reloc_status_type r = bfd_reloc_ok;
1307 bfd_vma x;
1308
1309 if (address > bfd_get_section_limit (input_bfd, input_section))
1310 return bfd_reloc_outofrange;
1311
1312 value += addend;
1313
1314 /* Perform usual pc-relative correction. */
1315 value -= input_section->output_section->vma + input_section->output_offset;
1316 value -= address;
1317
1318 /* We are getting reloc_entry->address 2 byte off from
1319 the start of instruction. Assuming absolute postion
1320 of the reloc data. But, following code had been written assuming
1321 reloc address is starting at begining of instruction.
1322 To compensate that I have increased the value of
1323 relocation by 1 (effectively 2) and used the addr -2 instead of addr. */
1324
1325 value += 2;
1326 address -= 2;
1327
1328 if ((value & 0xFF000000) != 0
1329 && (value & 0xFF000000) != 0xFF000000)
1330 r = bfd_reloc_overflow;
1331
1332 value >>= 1;
1333
1334 x = bfd_get_16 (input_bfd, contents + address);
1335 x = (x & 0xff00) | ((value >> 16) & 0xff);
1336 bfd_put_16 (input_bfd, x, contents + address);
1337
1338 x = bfd_get_16 (input_bfd, contents + address + 2);
1339 x = value & 0xFFFF;
1340 bfd_put_16 (input_bfd, x, contents + address + 2);
1341 return r;
1342 }
1343
1344 return _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
1345 rel->r_offset, value, addend);
1346
1347 }
1348
1349 static bfd_boolean
1350 bfin_relocate_section (bfd * output_bfd,
1351 struct bfd_link_info *info,
1352 bfd * input_bfd,
1353 asection * input_section,
1354 bfd_byte * contents,
1355 Elf_Internal_Rela * relocs,
1356 Elf_Internal_Sym * local_syms,
1357 asection ** local_sections)
1358 {
1359 bfd *dynobj;
1360 Elf_Internal_Shdr *symtab_hdr;
1361 struct elf_link_hash_entry **sym_hashes;
1362 bfd_vma *local_got_offsets;
1363 asection *sgot;
1364 Elf_Internal_Rela *rel;
1365 Elf_Internal_Rela *relend;
1366 int i = 0;
1367
1368 dynobj = elf_hash_table (info)->dynobj;
1369 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1370 sym_hashes = elf_sym_hashes (input_bfd);
1371 local_got_offsets = elf_local_got_offsets (input_bfd);
1372
1373 sgot = NULL;
1374
1375 rel = relocs;
1376 relend = relocs + input_section->reloc_count;
1377 for (; rel < relend; rel++, i++)
1378 {
1379 int r_type;
1380 reloc_howto_type *howto;
1381 unsigned long r_symndx;
1382 struct elf_link_hash_entry *h;
1383 Elf_Internal_Sym *sym;
1384 asection *sec;
1385 bfd_vma relocation = 0;
1386 bfd_boolean unresolved_reloc;
1387 bfd_reloc_status_type r;
1388 bfd_vma address;
1389
1390 r_type = ELF32_R_TYPE (rel->r_info);
1391 if (r_type < 0 || r_type >= 243)
1392 {
1393 bfd_set_error (bfd_error_bad_value);
1394 return FALSE;
1395 }
1396
1397 if (r_type == R_BFIN_GNU_VTENTRY
1398 || r_type == R_BFIN_GNU_VTINHERIT)
1399 continue;
1400
1401 howto = bfin_reloc_type_lookup (input_bfd, r_type);
1402 if (howto == NULL)
1403 {
1404 bfd_set_error (bfd_error_bad_value);
1405 return FALSE;
1406 }
1407 r_symndx = ELF32_R_SYM (rel->r_info);
1408
1409 h = NULL;
1410 sym = NULL;
1411 sec = NULL;
1412 unresolved_reloc = FALSE;
1413
1414 if (r_symndx < symtab_hdr->sh_info)
1415 {
1416 sym = local_syms + r_symndx;
1417 sec = local_sections[r_symndx];
1418 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1419 }
1420 else
1421 {
1422 bfd_boolean warned;
1423
1424 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1425 r_symndx, symtab_hdr, sym_hashes,
1426 h, sec, relocation,
1427 unresolved_reloc, warned);
1428 }
1429
1430 if (sec != NULL && elf_discarded_section (sec))
1431 {
1432 /* For relocs against symbols from removed linkonce sections,
1433 or sections discarded by a linker script, we just want the
1434 section contents zeroed. Avoid any special processing. */
1435 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
1436 rel->r_info = 0;
1437 rel->r_addend = 0;
1438 continue;
1439 }
1440
1441 if (info->relocatable)
1442 continue;
1443
1444 address = rel->r_offset;
1445
1446 /* Then, process normally. */
1447 switch (r_type)
1448 {
1449 case R_BFIN_GNU_VTINHERIT:
1450 case R_BFIN_GNU_VTENTRY:
1451 return bfd_reloc_ok;
1452
1453 case R_BFIN_GOT:
1454 /* Relocation is to the address of the entry for this symbol
1455 in the global offset table. */
1456 if (h != NULL
1457 && strcmp (h->root.root.string, "__GLOBAL_OFFSET_TABLE_") == 0)
1458 goto do_default;
1459 /* Fall through. */
1460 /* Relocation is the offset of the entry for this symbol in
1461 the global offset table. */
1462
1463 {
1464 bfd_vma off;
1465
1466 if (dynobj == NULL)
1467 {
1468 /* Create the .got section. */
1469 elf_hash_table (info)->dynobj = dynobj = output_bfd;
1470 if (!_bfd_elf_create_got_section (dynobj, info))
1471 return FALSE;
1472 }
1473
1474 if (sgot == NULL)
1475 {
1476 sgot = bfd_get_section_by_name (dynobj, ".got");
1477 BFD_ASSERT (sgot != NULL);
1478 }
1479
1480 if (h != NULL)
1481 {
1482 bfd_boolean dyn;
1483
1484 off = h->got.offset;
1485 BFD_ASSERT (off != (bfd_vma) - 1);
1486 dyn = elf_hash_table (info)->dynamic_sections_created;
1487
1488 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
1489 || (info->shared
1490 && (info->symbolic
1491 || h->dynindx == -1
1492 || h->forced_local)
1493 && h->def_regular))
1494 {
1495 /* This is actually a static link, or it is a
1496 -Bsymbolic link and the symbol is defined
1497 locally, or the symbol was forced to be local
1498 because of a version file.. We must initialize
1499 this entry in the global offset table. Since
1500 the offset must always be a multiple of 4, we
1501 use the least significant bit to record whether
1502 we have initialized it already.
1503
1504 When doing a dynamic link, we create a .rela.got
1505 relocation entry to initialize the value. This
1506 is done in the finish_dynamic_symbol routine. */
1507 if ((off & 1) != 0)
1508 off &= ~1;
1509 else
1510 {
1511 bfd_put_32 (output_bfd, relocation,
1512 sgot->contents + off);
1513 h->got.offset |= 1;
1514 }
1515 }
1516 else
1517 unresolved_reloc = FALSE;
1518 }
1519 else
1520 {
1521 BFD_ASSERT (local_got_offsets != NULL);
1522 off = local_got_offsets[r_symndx];
1523 BFD_ASSERT (off != (bfd_vma) - 1);
1524
1525 /* The offset must always be a multiple of 4. We use
1526 the least significant bit to record whether we have
1527 already generated the necessary reloc. */
1528 if ((off & 1) != 0)
1529 off &= ~1;
1530 else
1531 {
1532 bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1533
1534 if (info->shared)
1535 {
1536 asection *s;
1537 Elf_Internal_Rela outrel;
1538 bfd_byte *loc;
1539
1540 s = bfd_get_section_by_name (dynobj, ".rela.got");
1541 BFD_ASSERT (s != NULL);
1542
1543 outrel.r_offset = (sgot->output_section->vma
1544 + sgot->output_offset + off);
1545 outrel.r_info =
1546 ELF32_R_INFO (0, R_BFIN_PCREL24);
1547 outrel.r_addend = relocation;
1548 loc = s->contents;
1549 loc +=
1550 s->reloc_count++ * sizeof (Elf32_External_Rela);
1551 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1552 }
1553
1554 local_got_offsets[r_symndx] |= 1;
1555 }
1556 }
1557
1558 relocation = sgot->output_offset + off;
1559 rel->r_addend = 0;
1560 /* bfin : preg = [preg + 17bitdiv4offset] relocation is div by 4. */
1561 relocation /= 4;
1562 }
1563 goto do_default;
1564
1565 default:
1566 do_default:
1567 r = bfin_final_link_relocate (rel, howto, input_bfd, input_section,
1568 contents, address,
1569 relocation, rel->r_addend);
1570
1571 break;
1572 }
1573
1574 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
1575 because such sections are not SEC_ALLOC and thus ld.so will
1576 not process them. */
1577 if (unresolved_reloc
1578 && !((input_section->flags & SEC_DEBUGGING) != 0 && h->def_dynamic))
1579 {
1580 (*_bfd_error_handler)
1581 (_("%B(%A+0x%lx): unresolvable relocation against symbol `%s'"),
1582 input_bfd,
1583 input_section, (long) rel->r_offset, h->root.root.string);
1584 return FALSE;
1585 }
1586
1587 if (r != bfd_reloc_ok)
1588 {
1589 const char *name;
1590
1591 if (h != NULL)
1592 name = h->root.root.string;
1593 else
1594 {
1595 name = bfd_elf_string_from_elf_section (input_bfd,
1596 symtab_hdr->sh_link,
1597 sym->st_name);
1598 if (name == NULL)
1599 return FALSE;
1600 if (*name == '\0')
1601 name = bfd_section_name (input_bfd, sec);
1602 }
1603
1604 if (r == bfd_reloc_overflow)
1605 {
1606 if (!(info->callbacks->reloc_overflow
1607 (info, (h ? &h->root : NULL), name, howto->name,
1608 (bfd_vma) 0, input_bfd, input_section, rel->r_offset)))
1609 return FALSE;
1610 }
1611 else
1612 {
1613 (*_bfd_error_handler)
1614 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
1615 input_bfd, input_section,
1616 (long) rel->r_offset, name, (int) r);
1617 return FALSE;
1618 }
1619 }
1620 }
1621
1622 return TRUE;
1623 }
1624
1625 static asection *
1626 bfin_gc_mark_hook (asection * sec,
1627 struct bfd_link_info *info,
1628 Elf_Internal_Rela * rel,
1629 struct elf_link_hash_entry *h,
1630 Elf_Internal_Sym * sym)
1631 {
1632 if (h != NULL)
1633 switch (ELF32_R_TYPE (rel->r_info))
1634 {
1635 case R_BFIN_GNU_VTINHERIT:
1636 case R_BFIN_GNU_VTENTRY:
1637 return NULL;
1638 }
1639
1640 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1641 }
1642
1643 /* Update the got entry reference counts for the section being removed. */
1644
1645 static bfd_boolean
1646 bfin_gc_sweep_hook (bfd * abfd,
1647 struct bfd_link_info *info,
1648 asection * sec,
1649 const Elf_Internal_Rela * relocs)
1650 {
1651 Elf_Internal_Shdr *symtab_hdr;
1652 struct elf_link_hash_entry **sym_hashes;
1653 bfd_signed_vma *local_got_refcounts;
1654 const Elf_Internal_Rela *rel, *relend;
1655 bfd *dynobj;
1656 asection *sgot;
1657 asection *srelgot;
1658
1659 dynobj = elf_hash_table (info)->dynobj;
1660 if (dynobj == NULL)
1661 return TRUE;
1662
1663 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1664 sym_hashes = elf_sym_hashes (abfd);
1665 local_got_refcounts = elf_local_got_refcounts (abfd);
1666
1667 sgot = bfd_get_section_by_name (dynobj, ".got");
1668 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1669
1670 relend = relocs + sec->reloc_count;
1671 for (rel = relocs; rel < relend; rel++)
1672 {
1673 unsigned long r_symndx;
1674 struct elf_link_hash_entry *h;
1675
1676 switch (ELF32_R_TYPE (rel->r_info))
1677 {
1678 case R_BFIN_GOT:
1679 r_symndx = ELF32_R_SYM (rel->r_info);
1680 if (r_symndx >= symtab_hdr->sh_info)
1681 {
1682 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1683 if (h->got.refcount > 0)
1684 {
1685 --h->got.refcount;
1686 if (h->got.refcount == 0)
1687 {
1688 /* We don't need the .got entry any more. */
1689 sgot->size -= 4;
1690 srelgot->size -= sizeof (Elf32_External_Rela);
1691 }
1692 }
1693 }
1694 else if (local_got_refcounts != NULL)
1695 {
1696 if (local_got_refcounts[r_symndx] > 0)
1697 {
1698 --local_got_refcounts[r_symndx];
1699 if (local_got_refcounts[r_symndx] == 0)
1700 {
1701 /* We don't need the .got entry any more. */
1702 sgot->size -= 4;
1703 if (info->shared)
1704 srelgot->size -= sizeof (Elf32_External_Rela);
1705 }
1706 }
1707 }
1708 break;
1709 default:
1710 break;
1711 }
1712 }
1713 return TRUE;
1714 }
1715 \f
1716 extern const bfd_target bfd_elf32_bfinfdpic_vec;
1717 #define IS_FDPIC(bfd) ((bfd)->xvec == &bfd_elf32_bfinfdpic_vec)
1718
1719 /* An extension of the elf hash table data structure, containing some
1720 additional Blackfin-specific data. */
1721 struct bfinfdpic_elf_link_hash_table
1722 {
1723 struct elf_link_hash_table elf;
1724
1725 /* A pointer to the .got section. */
1726 asection *sgot;
1727 /* A pointer to the .rel.got section. */
1728 asection *sgotrel;
1729 /* A pointer to the .rofixup section. */
1730 asection *sgotfixup;
1731 /* A pointer to the .plt section. */
1732 asection *splt;
1733 /* A pointer to the .rel.plt section. */
1734 asection *spltrel;
1735 /* GOT base offset. */
1736 bfd_vma got0;
1737 /* Location of the first non-lazy PLT entry, i.e., the number of
1738 bytes taken by lazy PLT entries. */
1739 bfd_vma plt0;
1740 /* A hash table holding information about which symbols were
1741 referenced with which PIC-related relocations. */
1742 struct htab *relocs_info;
1743 /* Summary reloc information collected by
1744 _bfinfdpic_count_got_plt_entries. */
1745 struct _bfinfdpic_dynamic_got_info *g;
1746 };
1747
1748 /* Get the Blackfin ELF linker hash table from a link_info structure. */
1749
1750 #define bfinfdpic_hash_table(info) \
1751 ((struct bfinfdpic_elf_link_hash_table *) ((info)->hash))
1752
1753 #define bfinfdpic_got_section(info) \
1754 (bfinfdpic_hash_table (info)->sgot)
1755 #define bfinfdpic_gotrel_section(info) \
1756 (bfinfdpic_hash_table (info)->sgotrel)
1757 #define bfinfdpic_gotfixup_section(info) \
1758 (bfinfdpic_hash_table (info)->sgotfixup)
1759 #define bfinfdpic_plt_section(info) \
1760 (bfinfdpic_hash_table (info)->splt)
1761 #define bfinfdpic_pltrel_section(info) \
1762 (bfinfdpic_hash_table (info)->spltrel)
1763 #define bfinfdpic_relocs_info(info) \
1764 (bfinfdpic_hash_table (info)->relocs_info)
1765 #define bfinfdpic_got_initial_offset(info) \
1766 (bfinfdpic_hash_table (info)->got0)
1767 #define bfinfdpic_plt_initial_offset(info) \
1768 (bfinfdpic_hash_table (info)->plt0)
1769 #define bfinfdpic_dynamic_got_plt_info(info) \
1770 (bfinfdpic_hash_table (info)->g)
1771
1772 /* The name of the dynamic interpreter. This is put in the .interp
1773 section. */
1774
1775 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
1776
1777 #define DEFAULT_STACK_SIZE 0x20000
1778
1779 /* This structure is used to collect the number of entries present in
1780 each addressable range of the got. */
1781 struct _bfinfdpic_dynamic_got_info
1782 {
1783 /* Several bits of information about the current link. */
1784 struct bfd_link_info *info;
1785 /* Total size needed for GOT entries within the 18- or 32-bit
1786 ranges. */
1787 bfd_vma got17m4, gothilo;
1788 /* Total size needed for function descriptor entries within the 18-
1789 or 32-bit ranges. */
1790 bfd_vma fd17m4, fdhilo;
1791 /* Total size needed function descriptor entries referenced in PLT
1792 entries, that would be profitable to place in offsets close to
1793 the PIC register. */
1794 bfd_vma fdplt;
1795 /* Total size needed by lazy PLT entries. */
1796 bfd_vma lzplt;
1797 /* Number of relocations carried over from input object files. */
1798 unsigned long relocs;
1799 /* Number of fixups introduced by relocations in input object files. */
1800 unsigned long fixups;
1801 };
1802
1803 /* Create a Blackfin ELF linker hash table. */
1804
1805 static struct bfd_link_hash_table *
1806 bfinfdpic_elf_link_hash_table_create (bfd *abfd)
1807 {
1808 struct bfinfdpic_elf_link_hash_table *ret;
1809 bfd_size_type amt = sizeof (struct bfinfdpic_elf_link_hash_table);
1810
1811 ret = bfd_zalloc (abfd, amt);
1812 if (ret == NULL)
1813 return NULL;
1814
1815 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
1816 _bfd_elf_link_hash_newfunc,
1817 sizeof (struct elf_link_hash_entry)))
1818 {
1819 free (ret);
1820 return NULL;
1821 }
1822
1823 return &ret->elf.root;
1824 }
1825
1826 /* Decide whether a reference to a symbol can be resolved locally or
1827 not. If the symbol is protected, we want the local address, but
1828 its function descriptor must be assigned by the dynamic linker. */
1829 #define BFINFDPIC_SYM_LOCAL(INFO, H) \
1830 (_bfd_elf_symbol_refs_local_p ((H), (INFO), 1) \
1831 || ! elf_hash_table (INFO)->dynamic_sections_created)
1832 #define BFINFDPIC_FUNCDESC_LOCAL(INFO, H) \
1833 ((H)->dynindx == -1 || ! elf_hash_table (INFO)->dynamic_sections_created)
1834
1835 /* This structure collects information on what kind of GOT, PLT or
1836 function descriptors are required by relocations that reference a
1837 certain symbol. */
1838 struct bfinfdpic_relocs_info
1839 {
1840 /* The index of the symbol, as stored in the relocation r_info, if
1841 we have a local symbol; -1 otherwise. */
1842 long symndx;
1843 union
1844 {
1845 /* The input bfd in which the symbol is defined, if it's a local
1846 symbol. */
1847 bfd *abfd;
1848 /* If symndx == -1, the hash table entry corresponding to a global
1849 symbol (even if it turns out to bind locally, in which case it
1850 should ideally be replaced with section's symndx + addend). */
1851 struct elf_link_hash_entry *h;
1852 } d;
1853 /* The addend of the relocation that references the symbol. */
1854 bfd_vma addend;
1855
1856 /* The fields above are used to identify an entry. The fields below
1857 contain information on how an entry is used and, later on, which
1858 locations it was assigned. */
1859 /* The following 2 fields record whether the symbol+addend above was
1860 ever referenced with a GOT relocation. The 17M4 suffix indicates a
1861 GOT17M4 relocation; hilo is used for GOTLO/GOTHI pairs. */
1862 unsigned got17m4;
1863 unsigned gothilo;
1864 /* Whether a FUNCDESC relocation references symbol+addend. */
1865 unsigned fd;
1866 /* Whether a FUNCDESC_GOT relocation references symbol+addend. */
1867 unsigned fdgot17m4;
1868 unsigned fdgothilo;
1869 /* Whether a FUNCDESC_GOTOFF relocation references symbol+addend. */
1870 unsigned fdgoff17m4;
1871 unsigned fdgoffhilo;
1872 /* Whether symbol+addend is referenced with GOTOFF17M4, GOTOFFLO or
1873 GOTOFFHI relocations. The addend doesn't really matter, since we
1874 envision that this will only be used to check whether the symbol
1875 is mapped to the same segment as the got. */
1876 unsigned gotoff;
1877 /* Whether symbol+addend is referenced by a LABEL24 relocation. */
1878 unsigned call;
1879 /* Whether symbol+addend is referenced by a 32 or FUNCDESC_VALUE
1880 relocation. */
1881 unsigned sym;
1882 /* Whether we need a PLT entry for a symbol. Should be implied by
1883 something like:
1884 (call && symndx == -1 && ! BFINFDPIC_SYM_LOCAL (info, d.h)) */
1885 unsigned plt:1;
1886 /* Whether a function descriptor should be created in this link unit
1887 for symbol+addend. Should be implied by something like:
1888 (plt || fdgotoff17m4 || fdgotofflohi
1889 || ((fd || fdgot17m4 || fdgothilo)
1890 && (symndx != -1 || BFINFDPIC_FUNCDESC_LOCAL (info, d.h)))) */
1891 unsigned privfd:1;
1892 /* Whether a lazy PLT entry is needed for this symbol+addend.
1893 Should be implied by something like:
1894 (privfd && symndx == -1 && ! BFINFDPIC_SYM_LOCAL (info, d.h)
1895 && ! (info->flags & DF_BIND_NOW)) */
1896 unsigned lazyplt:1;
1897 /* Whether we've already emitted GOT relocations and PLT entries as
1898 needed for this symbol. */
1899 unsigned done:1;
1900
1901 /* The number of R_BFIN_BYTE4_DATA, R_BFIN_FUNCDESC and R_BFIN_FUNCDESC_VALUE
1902 relocations referencing the symbol. */
1903 unsigned relocs32, relocsfd, relocsfdv;
1904
1905 /* The number of .rofixups entries and dynamic relocations allocated
1906 for this symbol, minus any that might have already been used. */
1907 unsigned fixups, dynrelocs;
1908
1909 /* The offsets of the GOT entries assigned to symbol+addend, to the
1910 function descriptor's address, and to a function descriptor,
1911 respectively. Should be zero if unassigned. The offsets are
1912 counted from the value that will be assigned to the PIC register,
1913 not from the beginning of the .got section. */
1914 bfd_signed_vma got_entry, fdgot_entry, fd_entry;
1915 /* The offsets of the PLT entries assigned to symbol+addend,
1916 non-lazy and lazy, respectively. If unassigned, should be
1917 (bfd_vma)-1. */
1918 bfd_vma plt_entry, lzplt_entry;
1919 };
1920
1921 /* Compute a hash with the key fields of an bfinfdpic_relocs_info entry. */
1922 static hashval_t
1923 bfinfdpic_relocs_info_hash (const void *entry_)
1924 {
1925 const struct bfinfdpic_relocs_info *entry = entry_;
1926
1927 return (entry->symndx == -1
1928 ? (long) entry->d.h->root.root.hash
1929 : entry->symndx + (long) entry->d.abfd->id * 257) + entry->addend;
1930 }
1931
1932 /* Test whether the key fields of two bfinfdpic_relocs_info entries are
1933 identical. */
1934 static int
1935 bfinfdpic_relocs_info_eq (const void *entry1, const void *entry2)
1936 {
1937 const struct bfinfdpic_relocs_info *e1 = entry1;
1938 const struct bfinfdpic_relocs_info *e2 = entry2;
1939
1940 return e1->symndx == e2->symndx && e1->addend == e2->addend
1941 && (e1->symndx == -1 ? e1->d.h == e2->d.h : e1->d.abfd == e2->d.abfd);
1942 }
1943
1944 /* Find or create an entry in a hash table HT that matches the key
1945 fields of the given ENTRY. If it's not found, memory for a new
1946 entry is allocated in ABFD's obstack. */
1947 static struct bfinfdpic_relocs_info *
1948 bfinfdpic_relocs_info_find (struct htab *ht,
1949 bfd *abfd,
1950 const struct bfinfdpic_relocs_info *entry,
1951 enum insert_option insert)
1952 {
1953 struct bfinfdpic_relocs_info **loc =
1954 (struct bfinfdpic_relocs_info **) htab_find_slot (ht, entry, insert);
1955
1956 if (! loc)
1957 return NULL;
1958
1959 if (*loc)
1960 return *loc;
1961
1962 *loc = bfd_zalloc (abfd, sizeof (**loc));
1963
1964 if (! *loc)
1965 return *loc;
1966
1967 (*loc)->symndx = entry->symndx;
1968 (*loc)->d = entry->d;
1969 (*loc)->addend = entry->addend;
1970 (*loc)->plt_entry = (bfd_vma)-1;
1971 (*loc)->lzplt_entry = (bfd_vma)-1;
1972
1973 return *loc;
1974 }
1975
1976 /* Obtain the address of the entry in HT associated with H's symbol +
1977 addend, creating a new entry if none existed. ABFD is only used
1978 for memory allocation purposes. */
1979 inline static struct bfinfdpic_relocs_info *
1980 bfinfdpic_relocs_info_for_global (struct htab *ht,
1981 bfd *abfd,
1982 struct elf_link_hash_entry *h,
1983 bfd_vma addend,
1984 enum insert_option insert)
1985 {
1986 struct bfinfdpic_relocs_info entry;
1987
1988 entry.symndx = -1;
1989 entry.d.h = h;
1990 entry.addend = addend;
1991
1992 return bfinfdpic_relocs_info_find (ht, abfd, &entry, insert);
1993 }
1994
1995 /* Obtain the address of the entry in HT associated with the SYMNDXth
1996 local symbol of the input bfd ABFD, plus the addend, creating a new
1997 entry if none existed. */
1998 inline static struct bfinfdpic_relocs_info *
1999 bfinfdpic_relocs_info_for_local (struct htab *ht,
2000 bfd *abfd,
2001 long symndx,
2002 bfd_vma addend,
2003 enum insert_option insert)
2004 {
2005 struct bfinfdpic_relocs_info entry;
2006
2007 entry.symndx = symndx;
2008 entry.d.abfd = abfd;
2009 entry.addend = addend;
2010
2011 return bfinfdpic_relocs_info_find (ht, abfd, &entry, insert);
2012 }
2013
2014 /* Merge fields set by check_relocs() of two entries that end up being
2015 mapped to the same (presumably global) symbol. */
2016
2017 inline static void
2018 bfinfdpic_pic_merge_early_relocs_info (struct bfinfdpic_relocs_info *e2,
2019 struct bfinfdpic_relocs_info const *e1)
2020 {
2021 e2->got17m4 |= e1->got17m4;
2022 e2->gothilo |= e1->gothilo;
2023 e2->fd |= e1->fd;
2024 e2->fdgot17m4 |= e1->fdgot17m4;
2025 e2->fdgothilo |= e1->fdgothilo;
2026 e2->fdgoff17m4 |= e1->fdgoff17m4;
2027 e2->fdgoffhilo |= e1->fdgoffhilo;
2028 e2->gotoff |= e1->gotoff;
2029 e2->call |= e1->call;
2030 e2->sym |= e1->sym;
2031 }
2032
2033 /* Every block of 65535 lazy PLT entries shares a single call to the
2034 resolver, inserted in the 32768th lazy PLT entry (i.e., entry #
2035 32767, counting from 0). All other lazy PLT entries branch to it
2036 in a single instruction. */
2037
2038 #define LZPLT_RESOLVER_EXTRA 10
2039 #define LZPLT_NORMAL_SIZE 6
2040 #define LZPLT_ENTRIES 1362
2041
2042 #define BFINFDPIC_LZPLT_BLOCK_SIZE ((bfd_vma) LZPLT_NORMAL_SIZE * LZPLT_ENTRIES + LZPLT_RESOLVER_EXTRA)
2043 #define BFINFDPIC_LZPLT_RESOLV_LOC (LZPLT_NORMAL_SIZE * LZPLT_ENTRIES / 2)
2044
2045 /* Add a dynamic relocation to the SRELOC section. */
2046
2047 inline static bfd_vma
2048 _bfinfdpic_add_dyn_reloc (bfd *output_bfd, asection *sreloc, bfd_vma offset,
2049 int reloc_type, long dynindx, bfd_vma addend,
2050 struct bfinfdpic_relocs_info *entry)
2051 {
2052 Elf_Internal_Rela outrel;
2053 bfd_vma reloc_offset;
2054
2055 outrel.r_offset = offset;
2056 outrel.r_info = ELF32_R_INFO (dynindx, reloc_type);
2057 outrel.r_addend = addend;
2058
2059 reloc_offset = sreloc->reloc_count * sizeof (Elf32_External_Rel);
2060 BFD_ASSERT (reloc_offset < sreloc->size);
2061 bfd_elf32_swap_reloc_out (output_bfd, &outrel,
2062 sreloc->contents + reloc_offset);
2063 sreloc->reloc_count++;
2064
2065 /* If the entry's index is zero, this relocation was probably to a
2066 linkonce section that got discarded. We reserved a dynamic
2067 relocation, but it was for another entry than the one we got at
2068 the time of emitting the relocation. Unfortunately there's no
2069 simple way for us to catch this situation, since the relocation
2070 is cleared right before calling relocate_section, at which point
2071 we no longer know what the relocation used to point to. */
2072 if (entry->symndx)
2073 {
2074 BFD_ASSERT (entry->dynrelocs > 0);
2075 entry->dynrelocs--;
2076 }
2077
2078 return reloc_offset;
2079 }
2080
2081 /* Add a fixup to the ROFIXUP section. */
2082
2083 static bfd_vma
2084 _bfinfdpic_add_rofixup (bfd *output_bfd, asection *rofixup, bfd_vma offset,
2085 struct bfinfdpic_relocs_info *entry)
2086 {
2087 bfd_vma fixup_offset;
2088
2089 if (rofixup->flags & SEC_EXCLUDE)
2090 return -1;
2091
2092 fixup_offset = rofixup->reloc_count * 4;
2093 if (rofixup->contents)
2094 {
2095 BFD_ASSERT (fixup_offset < rofixup->size);
2096 bfd_put_32 (output_bfd, offset, rofixup->contents + fixup_offset);
2097 }
2098 rofixup->reloc_count++;
2099
2100 if (entry && entry->symndx)
2101 {
2102 /* See discussion about symndx == 0 in _bfinfdpic_add_dyn_reloc
2103 above. */
2104 BFD_ASSERT (entry->fixups > 0);
2105 entry->fixups--;
2106 }
2107
2108 return fixup_offset;
2109 }
2110
2111 /* Find the segment number in which OSEC, and output section, is
2112 located. */
2113
2114 static unsigned
2115 _bfinfdpic_osec_to_segment (bfd *output_bfd, asection *osec)
2116 {
2117 Elf_Internal_Phdr *p = _bfd_elf_find_segment_containing_section (output_bfd, osec);
2118
2119 return (p != NULL) ? p - elf_tdata (output_bfd)->phdr : -1;
2120 }
2121
2122 inline static bfd_boolean
2123 _bfinfdpic_osec_readonly_p (bfd *output_bfd, asection *osec)
2124 {
2125 unsigned seg = _bfinfdpic_osec_to_segment (output_bfd, osec);
2126
2127 return ! (elf_tdata (output_bfd)->phdr[seg].p_flags & PF_W);
2128 }
2129
2130 /* Generate relocations for GOT entries, function descriptors, and
2131 code for PLT and lazy PLT entries. */
2132
2133 inline static bfd_boolean
2134 _bfinfdpic_emit_got_relocs_plt_entries (struct bfinfdpic_relocs_info *entry,
2135 bfd *output_bfd,
2136 struct bfd_link_info *info,
2137 asection *sec,
2138 Elf_Internal_Sym *sym,
2139 bfd_vma addend)
2140
2141 {
2142 bfd_vma fd_lazy_rel_offset = (bfd_vma)-1;
2143 int dynindx = -1;
2144
2145 if (entry->done)
2146 return TRUE;
2147 entry->done = 1;
2148
2149 if (entry->got_entry || entry->fdgot_entry || entry->fd_entry)
2150 {
2151 /* If the symbol is dynamic, consider it for dynamic
2152 relocations, otherwise decay to section + offset. */
2153 if (entry->symndx == -1 && entry->d.h->dynindx != -1)
2154 dynindx = entry->d.h->dynindx;
2155 else
2156 {
2157 if (sec
2158 && sec->output_section
2159 && ! bfd_is_abs_section (sec->output_section)
2160 && ! bfd_is_und_section (sec->output_section))
2161 dynindx = elf_section_data (sec->output_section)->dynindx;
2162 else
2163 dynindx = 0;
2164 }
2165 }
2166
2167 /* Generate relocation for GOT entry pointing to the symbol. */
2168 if (entry->got_entry)
2169 {
2170 int idx = dynindx;
2171 bfd_vma ad = addend;
2172
2173 /* If the symbol is dynamic but binds locally, use
2174 section+offset. */
2175 if (sec && (entry->symndx != -1
2176 || BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
2177 {
2178 if (entry->symndx == -1)
2179 ad += entry->d.h->root.u.def.value;
2180 else
2181 ad += sym->st_value;
2182 ad += sec->output_offset;
2183 if (sec->output_section && elf_section_data (sec->output_section))
2184 idx = elf_section_data (sec->output_section)->dynindx;
2185 else
2186 idx = 0;
2187 }
2188
2189 /* If we're linking an executable at a fixed address, we can
2190 omit the dynamic relocation as long as the symbol is local to
2191 this module. */
2192 if (info->executable && !info->pie
2193 && (entry->symndx != -1
2194 || BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
2195 {
2196 if (sec)
2197 ad += sec->output_section->vma;
2198 if (entry->symndx != -1
2199 || entry->d.h->root.type != bfd_link_hash_undefweak)
2200 _bfinfdpic_add_rofixup (output_bfd,
2201 bfinfdpic_gotfixup_section (info),
2202 bfinfdpic_got_section (info)->output_section
2203 ->vma
2204 + bfinfdpic_got_section (info)->output_offset
2205 + bfinfdpic_got_initial_offset (info)
2206 + entry->got_entry, entry);
2207 }
2208 else
2209 _bfinfdpic_add_dyn_reloc (output_bfd, bfinfdpic_gotrel_section (info),
2210 _bfd_elf_section_offset
2211 (output_bfd, info,
2212 bfinfdpic_got_section (info),
2213 bfinfdpic_got_initial_offset (info)
2214 + entry->got_entry)
2215 + bfinfdpic_got_section (info)
2216 ->output_section->vma
2217 + bfinfdpic_got_section (info)->output_offset,
2218 R_BFIN_BYTE4_DATA, idx, ad, entry);
2219
2220 bfd_put_32 (output_bfd, ad,
2221 bfinfdpic_got_section (info)->contents
2222 + bfinfdpic_got_initial_offset (info)
2223 + entry->got_entry);
2224 }
2225
2226 /* Generate relocation for GOT entry pointing to a canonical
2227 function descriptor. */
2228 if (entry->fdgot_entry)
2229 {
2230 int reloc, idx;
2231 bfd_vma ad = 0;
2232
2233 if (! (entry->symndx == -1
2234 && entry->d.h->root.type == bfd_link_hash_undefweak
2235 && BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
2236 {
2237 /* If the symbol is dynamic and there may be dynamic symbol
2238 resolution because we are, or are linked with, a shared
2239 library, emit a FUNCDESC relocation such that the dynamic
2240 linker will allocate the function descriptor. If the
2241 symbol needs a non-local function descriptor but binds
2242 locally (e.g., its visibility is protected, emit a
2243 dynamic relocation decayed to section+offset. */
2244 if (entry->symndx == -1
2245 && ! BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h)
2246 && BFINFDPIC_SYM_LOCAL (info, entry->d.h)
2247 && !(info->executable && !info->pie))
2248 {
2249 reloc = R_BFIN_FUNCDESC;
2250 idx = elf_section_data (entry->d.h->root.u.def.section
2251 ->output_section)->dynindx;
2252 ad = entry->d.h->root.u.def.section->output_offset
2253 + entry->d.h->root.u.def.value;
2254 }
2255 else if (entry->symndx == -1
2256 && ! BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h))
2257 {
2258 reloc = R_BFIN_FUNCDESC;
2259 idx = dynindx;
2260 ad = addend;
2261 if (ad)
2262 return FALSE;
2263 }
2264 else
2265 {
2266 /* Otherwise, we know we have a private function descriptor,
2267 so reference it directly. */
2268 if (elf_hash_table (info)->dynamic_sections_created)
2269 BFD_ASSERT (entry->privfd);
2270 reloc = R_BFIN_BYTE4_DATA;
2271 idx = elf_section_data (bfinfdpic_got_section (info)
2272 ->output_section)->dynindx;
2273 ad = bfinfdpic_got_section (info)->output_offset
2274 + bfinfdpic_got_initial_offset (info) + entry->fd_entry;
2275 }
2276
2277 /* If there is room for dynamic symbol resolution, emit the
2278 dynamic relocation. However, if we're linking an
2279 executable at a fixed location, we won't have emitted a
2280 dynamic symbol entry for the got section, so idx will be
2281 zero, which means we can and should compute the address
2282 of the private descriptor ourselves. */
2283 if (info->executable && !info->pie
2284 && (entry->symndx != -1
2285 || BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h)))
2286 {
2287 ad += bfinfdpic_got_section (info)->output_section->vma;
2288 _bfinfdpic_add_rofixup (output_bfd,
2289 bfinfdpic_gotfixup_section (info),
2290 bfinfdpic_got_section (info)
2291 ->output_section->vma
2292 + bfinfdpic_got_section (info)
2293 ->output_offset
2294 + bfinfdpic_got_initial_offset (info)
2295 + entry->fdgot_entry, entry);
2296 }
2297 else
2298 _bfinfdpic_add_dyn_reloc (output_bfd,
2299 bfinfdpic_gotrel_section (info),
2300 _bfd_elf_section_offset
2301 (output_bfd, info,
2302 bfinfdpic_got_section (info),
2303 bfinfdpic_got_initial_offset (info)
2304 + entry->fdgot_entry)
2305 + bfinfdpic_got_section (info)
2306 ->output_section->vma
2307 + bfinfdpic_got_section (info)
2308 ->output_offset,
2309 reloc, idx, ad, entry);
2310 }
2311
2312 bfd_put_32 (output_bfd, ad,
2313 bfinfdpic_got_section (info)->contents
2314 + bfinfdpic_got_initial_offset (info)
2315 + entry->fdgot_entry);
2316 }
2317
2318 /* Generate relocation to fill in a private function descriptor in
2319 the GOT. */
2320 if (entry->fd_entry)
2321 {
2322 int idx = dynindx;
2323 bfd_vma ad = addend;
2324 bfd_vma ofst;
2325 long lowword, highword;
2326
2327 /* If the symbol is dynamic but binds locally, use
2328 section+offset. */
2329 if (sec && (entry->symndx != -1
2330 || BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
2331 {
2332 if (entry->symndx == -1)
2333 ad += entry->d.h->root.u.def.value;
2334 else
2335 ad += sym->st_value;
2336 ad += sec->output_offset;
2337 if (sec->output_section && elf_section_data (sec->output_section))
2338 idx = elf_section_data (sec->output_section)->dynindx;
2339 else
2340 idx = 0;
2341 }
2342
2343 /* If we're linking an executable at a fixed address, we can
2344 omit the dynamic relocation as long as the symbol is local to
2345 this module. */
2346 if (info->executable && !info->pie
2347 && (entry->symndx != -1 || BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
2348 {
2349 if (sec)
2350 ad += sec->output_section->vma;
2351 ofst = 0;
2352 if (entry->symndx != -1
2353 || entry->d.h->root.type != bfd_link_hash_undefweak)
2354 {
2355 _bfinfdpic_add_rofixup (output_bfd,
2356 bfinfdpic_gotfixup_section (info),
2357 bfinfdpic_got_section (info)
2358 ->output_section->vma
2359 + bfinfdpic_got_section (info)
2360 ->output_offset
2361 + bfinfdpic_got_initial_offset (info)
2362 + entry->fd_entry, entry);
2363 _bfinfdpic_add_rofixup (output_bfd,
2364 bfinfdpic_gotfixup_section (info),
2365 bfinfdpic_got_section (info)
2366 ->output_section->vma
2367 + bfinfdpic_got_section (info)
2368 ->output_offset
2369 + bfinfdpic_got_initial_offset (info)
2370 + entry->fd_entry + 4, entry);
2371 }
2372 }
2373 else
2374 {
2375 ofst
2376 = _bfinfdpic_add_dyn_reloc (output_bfd,
2377 entry->lazyplt
2378 ? bfinfdpic_pltrel_section (info)
2379 : bfinfdpic_gotrel_section (info),
2380 _bfd_elf_section_offset
2381 (output_bfd, info,
2382 bfinfdpic_got_section (info),
2383 bfinfdpic_got_initial_offset (info)
2384 + entry->fd_entry)
2385 + bfinfdpic_got_section (info)
2386 ->output_section->vma
2387 + bfinfdpic_got_section (info)
2388 ->output_offset,
2389 R_BFIN_FUNCDESC_VALUE, idx, ad, entry);
2390 }
2391
2392 /* If we've omitted the dynamic relocation, just emit the fixed
2393 addresses of the symbol and of the local GOT base offset. */
2394 if (info->executable && !info->pie && sec && sec->output_section)
2395 {
2396 lowword = ad;
2397 highword = bfinfdpic_got_section (info)->output_section->vma
2398 + bfinfdpic_got_section (info)->output_offset
2399 + bfinfdpic_got_initial_offset (info);
2400 }
2401 else if (entry->lazyplt)
2402 {
2403 if (ad)
2404 return FALSE;
2405
2406 fd_lazy_rel_offset = ofst;
2407
2408 /* A function descriptor used for lazy or local resolving is
2409 initialized such that its high word contains the output
2410 section index in which the PLT entries are located, and
2411 the low word contains the address of the lazy PLT entry
2412 entry point, that must be within the memory region
2413 assigned to that section. */
2414 lowword = entry->lzplt_entry + 4
2415 + bfinfdpic_plt_section (info)->output_offset
2416 + bfinfdpic_plt_section (info)->output_section->vma;
2417 highword = _bfinfdpic_osec_to_segment
2418 (output_bfd, bfinfdpic_plt_section (info)->output_section);
2419 }
2420 else
2421 {
2422 /* A function descriptor for a local function gets the index
2423 of the section. For a non-local function, it's
2424 disregarded. */
2425 lowword = ad;
2426 if (sec == NULL
2427 || (entry->symndx == -1 && entry->d.h->dynindx != -1
2428 && entry->d.h->dynindx == idx))
2429 highword = 0;
2430 else
2431 highword = _bfinfdpic_osec_to_segment
2432 (output_bfd, sec->output_section);
2433 }
2434
2435 bfd_put_32 (output_bfd, lowword,
2436 bfinfdpic_got_section (info)->contents
2437 + bfinfdpic_got_initial_offset (info)
2438 + entry->fd_entry);
2439 bfd_put_32 (output_bfd, highword,
2440 bfinfdpic_got_section (info)->contents
2441 + bfinfdpic_got_initial_offset (info)
2442 + entry->fd_entry + 4);
2443 }
2444
2445 /* Generate code for the PLT entry. */
2446 if (entry->plt_entry != (bfd_vma) -1)
2447 {
2448 bfd_byte *plt_code = bfinfdpic_plt_section (info)->contents
2449 + entry->plt_entry;
2450
2451 BFD_ASSERT (entry->fd_entry);
2452
2453 /* Figure out what kind of PLT entry we need, depending on the
2454 location of the function descriptor within the GOT. */
2455 if (entry->fd_entry >= -(1 << (18 - 1))
2456 && entry->fd_entry + 4 < (1 << (18 - 1)))
2457 {
2458 /* P1 = [P3 + fd_entry]; P3 = [P3 + fd_entry + 4] */
2459 bfd_put_32 (output_bfd,
2460 0xe519 | ((entry->fd_entry << 14) & 0xFFFF0000),
2461 plt_code);
2462 bfd_put_32 (output_bfd,
2463 0xe51b | (((entry->fd_entry + 4) << 14) & 0xFFFF0000),
2464 plt_code + 4);
2465 plt_code += 8;
2466 }
2467 else
2468 {
2469 /* P1.L = fd_entry; P1.H = fd_entry;
2470 P3 = P3 + P1;
2471 P1 = [P3];
2472 P3 = [P3 + 4]; */
2473 bfd_put_32 (output_bfd,
2474 0xe109 | (entry->fd_entry << 16),
2475 plt_code);
2476 bfd_put_32 (output_bfd,
2477 0xe149 | (entry->fd_entry & 0xFFFF0000),
2478 plt_code + 4);
2479 bfd_put_16 (output_bfd, 0x5ad9, plt_code + 8);
2480 bfd_put_16 (output_bfd, 0x9159, plt_code + 10);
2481 bfd_put_16 (output_bfd, 0xac5b, plt_code + 12);
2482 plt_code += 14;
2483 }
2484 /* JUMP (P1) */
2485 bfd_put_16 (output_bfd, 0x0051, plt_code);
2486 }
2487
2488 /* Generate code for the lazy PLT entry. */
2489 if (entry->lzplt_entry != (bfd_vma) -1)
2490 {
2491 bfd_byte *lzplt_code = bfinfdpic_plt_section (info)->contents
2492 + entry->lzplt_entry;
2493 bfd_vma resolverStub_addr;
2494
2495 bfd_put_32 (output_bfd, fd_lazy_rel_offset, lzplt_code);
2496 lzplt_code += 4;
2497
2498 resolverStub_addr = entry->lzplt_entry / BFINFDPIC_LZPLT_BLOCK_SIZE
2499 * BFINFDPIC_LZPLT_BLOCK_SIZE + BFINFDPIC_LZPLT_RESOLV_LOC;
2500 if (resolverStub_addr >= bfinfdpic_plt_initial_offset (info))
2501 resolverStub_addr = bfinfdpic_plt_initial_offset (info) - LZPLT_NORMAL_SIZE - LZPLT_RESOLVER_EXTRA;
2502
2503 if (entry->lzplt_entry == resolverStub_addr)
2504 {
2505 /* This is a lazy PLT entry that includes a resolver call.
2506 P2 = [P3];
2507 R3 = [P3 + 4];
2508 JUMP (P2); */
2509 bfd_put_32 (output_bfd,
2510 0xa05b915a,
2511 lzplt_code);
2512 bfd_put_16 (output_bfd, 0x0052, lzplt_code + 4);
2513 }
2514 else
2515 {
2516 /* JUMP.S resolverStub */
2517 bfd_put_16 (output_bfd,
2518 0x2000
2519 | (((resolverStub_addr - entry->lzplt_entry)
2520 / 2) & (((bfd_vma)1 << 12) - 1)),
2521 lzplt_code);
2522 }
2523 }
2524
2525 return TRUE;
2526 }
2527 \f
2528 /* Relocate an Blackfin ELF section.
2529
2530 The RELOCATE_SECTION function is called by the new ELF backend linker
2531 to handle the relocations for a section.
2532
2533 The relocs are always passed as Rela structures; if the section
2534 actually uses Rel structures, the r_addend field will always be
2535 zero.
2536
2537 This function is responsible for adjusting the section contents as
2538 necessary, and (if using Rela relocs and generating a relocatable
2539 output file) adjusting the reloc addend as necessary.
2540
2541 This function does not have to worry about setting the reloc
2542 address or the reloc symbol index.
2543
2544 LOCAL_SYMS is a pointer to the swapped in local symbols.
2545
2546 LOCAL_SECTIONS is an array giving the section in the input file
2547 corresponding to the st_shndx field of each local symbol.
2548
2549 The global hash table entry for the global symbols can be found
2550 via elf_sym_hashes (input_bfd).
2551
2552 When generating relocatable output, this function must handle
2553 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
2554 going to be the section symbol corresponding to the output
2555 section, which means that the addend must be adjusted
2556 accordingly. */
2557
2558 static bfd_boolean
2559 bfinfdpic_relocate_section (bfd * output_bfd,
2560 struct bfd_link_info *info,
2561 bfd * input_bfd,
2562 asection * input_section,
2563 bfd_byte * contents,
2564 Elf_Internal_Rela * relocs,
2565 Elf_Internal_Sym * local_syms,
2566 asection ** local_sections)
2567 {
2568 Elf_Internal_Shdr *symtab_hdr;
2569 struct elf_link_hash_entry **sym_hashes;
2570 Elf_Internal_Rela *rel;
2571 Elf_Internal_Rela *relend;
2572 unsigned isec_segment, got_segment, plt_segment,
2573 check_segment[2];
2574 int silence_segment_error = !(info->shared || info->pie);
2575
2576 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
2577 sym_hashes = elf_sym_hashes (input_bfd);
2578 relend = relocs + input_section->reloc_count;
2579
2580 isec_segment = _bfinfdpic_osec_to_segment (output_bfd,
2581 input_section->output_section);
2582 if (IS_FDPIC (output_bfd) && bfinfdpic_got_section (info))
2583 got_segment = _bfinfdpic_osec_to_segment (output_bfd,
2584 bfinfdpic_got_section (info)
2585 ->output_section);
2586 else
2587 got_segment = -1;
2588 if (IS_FDPIC (output_bfd) && elf_hash_table (info)->dynamic_sections_created)
2589 plt_segment = _bfinfdpic_osec_to_segment (output_bfd,
2590 bfinfdpic_plt_section (info)
2591 ->output_section);
2592 else
2593 plt_segment = -1;
2594
2595 for (rel = relocs; rel < relend; rel ++)
2596 {
2597 reloc_howto_type *howto;
2598 unsigned long r_symndx;
2599 Elf_Internal_Sym *sym;
2600 asection *sec;
2601 struct elf_link_hash_entry *h;
2602 bfd_vma relocation;
2603 bfd_reloc_status_type r;
2604 const char * name = NULL;
2605 int r_type;
2606 asection *osec;
2607 struct bfinfdpic_relocs_info *picrel;
2608 bfd_vma orig_addend = rel->r_addend;
2609
2610 r_type = ELF32_R_TYPE (rel->r_info);
2611
2612 if (r_type == R_BFIN_GNU_VTINHERIT
2613 || r_type == R_BFIN_GNU_VTENTRY)
2614 continue;
2615
2616 r_symndx = ELF32_R_SYM (rel->r_info);
2617 howto = bfin_reloc_type_lookup (input_bfd, r_type);
2618 if (howto == NULL)
2619 {
2620 bfd_set_error (bfd_error_bad_value);
2621 return FALSE;
2622 }
2623
2624 h = NULL;
2625 sym = NULL;
2626 sec = NULL;
2627
2628 if (r_symndx < symtab_hdr->sh_info)
2629 {
2630 sym = local_syms + r_symndx;
2631 osec = sec = local_sections [r_symndx];
2632 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2633
2634 name = bfd_elf_string_from_elf_section
2635 (input_bfd, symtab_hdr->sh_link, sym->st_name);
2636 name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
2637 }
2638 else
2639 {
2640 bfd_boolean warned;
2641 bfd_boolean unresolved_reloc;
2642
2643 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2644 r_symndx, symtab_hdr, sym_hashes,
2645 h, sec, relocation,
2646 unresolved_reloc, warned);
2647 osec = sec;
2648 }
2649
2650 if (sec != NULL && elf_discarded_section (sec))
2651 {
2652 /* For relocs against symbols from removed linkonce sections,
2653 or sections discarded by a linker script, we just want the
2654 section contents zeroed. Avoid any special processing. */
2655 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
2656 rel->r_info = 0;
2657 rel->r_addend = 0;
2658 continue;
2659 }
2660
2661 if (info->relocatable)
2662 continue;
2663
2664 if (h != NULL
2665 && (h->root.type == bfd_link_hash_defined
2666 || h->root.type == bfd_link_hash_defweak)
2667 && !BFINFDPIC_SYM_LOCAL (info, h))
2668 {
2669 osec = sec = NULL;
2670 relocation = 0;
2671 }
2672
2673 switch (r_type)
2674 {
2675 case R_BFIN_PCREL24:
2676 case R_BFIN_PCREL24_JUMP_L:
2677 case R_BFIN_BYTE4_DATA:
2678 if (! IS_FDPIC (output_bfd))
2679 goto non_fdpic;
2680
2681 case R_BFIN_GOT17M4:
2682 case R_BFIN_GOTHI:
2683 case R_BFIN_GOTLO:
2684 case R_BFIN_FUNCDESC_GOT17M4:
2685 case R_BFIN_FUNCDESC_GOTHI:
2686 case R_BFIN_FUNCDESC_GOTLO:
2687 case R_BFIN_GOTOFF17M4:
2688 case R_BFIN_GOTOFFHI:
2689 case R_BFIN_GOTOFFLO:
2690 case R_BFIN_FUNCDESC_GOTOFF17M4:
2691 case R_BFIN_FUNCDESC_GOTOFFHI:
2692 case R_BFIN_FUNCDESC_GOTOFFLO:
2693 case R_BFIN_FUNCDESC:
2694 case R_BFIN_FUNCDESC_VALUE:
2695 if (h != NULL)
2696 picrel = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info
2697 (info), input_bfd, h,
2698 orig_addend, INSERT);
2699 else
2700 /* In order to find the entry we created before, we must
2701 use the original addend, not the one that may have been
2702 modified by _bfd_elf_rela_local_sym(). */
2703 picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
2704 (info), input_bfd, r_symndx,
2705 orig_addend, INSERT);
2706 if (! picrel)
2707 return FALSE;
2708
2709 if (!_bfinfdpic_emit_got_relocs_plt_entries (picrel, output_bfd, info,
2710 osec, sym,
2711 rel->r_addend))
2712 {
2713 (*_bfd_error_handler)
2714 (_("%B: relocation at `%A+0x%x' references symbol `%s' with nonzero addend"),
2715 input_bfd, input_section, rel->r_offset, name);
2716 return FALSE;
2717
2718 }
2719
2720 break;
2721
2722 default:
2723 non_fdpic:
2724 picrel = NULL;
2725 if (h && ! BFINFDPIC_SYM_LOCAL (info, h))
2726 {
2727 info->callbacks->warning
2728 (info, _("relocation references symbol not defined in the module"),
2729 name, input_bfd, input_section, rel->r_offset);
2730 return FALSE;
2731 }
2732 break;
2733 }
2734
2735 switch (r_type)
2736 {
2737 case R_BFIN_PCREL24:
2738 case R_BFIN_PCREL24_JUMP_L:
2739 check_segment[0] = isec_segment;
2740 if (! IS_FDPIC (output_bfd))
2741 check_segment[1] = isec_segment;
2742 else if (picrel->plt)
2743 {
2744 relocation = bfinfdpic_plt_section (info)->output_section->vma
2745 + bfinfdpic_plt_section (info)->output_offset
2746 + picrel->plt_entry;
2747 check_segment[1] = plt_segment;
2748 }
2749 /* We don't want to warn on calls to undefined weak symbols,
2750 as calls to them must be protected by non-NULL tests
2751 anyway, and unprotected calls would invoke undefined
2752 behavior. */
2753 else if (picrel->symndx == -1
2754 && picrel->d.h->root.type == bfd_link_hash_undefweak)
2755 check_segment[1] = check_segment[0];
2756 else
2757 check_segment[1] = sec
2758 ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section)
2759 : (unsigned)-1;
2760 break;
2761
2762 case R_BFIN_GOT17M4:
2763 case R_BFIN_GOTHI:
2764 case R_BFIN_GOTLO:
2765 relocation = picrel->got_entry;
2766 check_segment[0] = check_segment[1] = got_segment;
2767 break;
2768
2769 case R_BFIN_FUNCDESC_GOT17M4:
2770 case R_BFIN_FUNCDESC_GOTHI:
2771 case R_BFIN_FUNCDESC_GOTLO:
2772 relocation = picrel->fdgot_entry;
2773 check_segment[0] = check_segment[1] = got_segment;
2774 break;
2775
2776 case R_BFIN_GOTOFFHI:
2777 case R_BFIN_GOTOFF17M4:
2778 case R_BFIN_GOTOFFLO:
2779 relocation -= bfinfdpic_got_section (info)->output_section->vma
2780 + bfinfdpic_got_section (info)->output_offset
2781 + bfinfdpic_got_initial_offset (info);
2782 check_segment[0] = got_segment;
2783 check_segment[1] = sec
2784 ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section)
2785 : (unsigned)-1;
2786 break;
2787
2788 case R_BFIN_FUNCDESC_GOTOFF17M4:
2789 case R_BFIN_FUNCDESC_GOTOFFHI:
2790 case R_BFIN_FUNCDESC_GOTOFFLO:
2791 relocation = picrel->fd_entry;
2792 check_segment[0] = check_segment[1] = got_segment;
2793 break;
2794
2795 case R_BFIN_FUNCDESC:
2796 {
2797 int dynindx;
2798 bfd_vma addend = rel->r_addend;
2799
2800 if (! (h && h->root.type == bfd_link_hash_undefweak
2801 && BFINFDPIC_SYM_LOCAL (info, h)))
2802 {
2803 /* If the symbol is dynamic and there may be dynamic
2804 symbol resolution because we are or are linked with a
2805 shared library, emit a FUNCDESC relocation such that
2806 the dynamic linker will allocate the function
2807 descriptor. If the symbol needs a non-local function
2808 descriptor but binds locally (e.g., its visibility is
2809 protected, emit a dynamic relocation decayed to
2810 section+offset. */
2811 if (h && ! BFINFDPIC_FUNCDESC_LOCAL (info, h)
2812 && BFINFDPIC_SYM_LOCAL (info, h)
2813 && !(info->executable && !info->pie))
2814 {
2815 dynindx = elf_section_data (h->root.u.def.section
2816 ->output_section)->dynindx;
2817 addend += h->root.u.def.section->output_offset
2818 + h->root.u.def.value;
2819 }
2820 else if (h && ! BFINFDPIC_FUNCDESC_LOCAL (info, h))
2821 {
2822 if (addend)
2823 {
2824 info->callbacks->warning
2825 (info, _("R_BFIN_FUNCDESC references dynamic symbol with nonzero addend"),
2826 name, input_bfd, input_section, rel->r_offset);
2827 return FALSE;
2828 }
2829 dynindx = h->dynindx;
2830 }
2831 else
2832 {
2833 /* Otherwise, we know we have a private function
2834 descriptor, so reference it directly. */
2835 BFD_ASSERT (picrel->privfd);
2836 r_type = R_BFIN_BYTE4_DATA;
2837 dynindx = elf_section_data (bfinfdpic_got_section (info)
2838 ->output_section)->dynindx;
2839 addend = bfinfdpic_got_section (info)->output_offset
2840 + bfinfdpic_got_initial_offset (info)
2841 + picrel->fd_entry;
2842 }
2843
2844 /* If there is room for dynamic symbol resolution, emit
2845 the dynamic relocation. However, if we're linking an
2846 executable at a fixed location, we won't have emitted a
2847 dynamic symbol entry for the got section, so idx will
2848 be zero, which means we can and should compute the
2849 address of the private descriptor ourselves. */
2850 if (info->executable && !info->pie
2851 && (!h || BFINFDPIC_FUNCDESC_LOCAL (info, h)))
2852 {
2853 bfd_vma offset;
2854
2855 addend += bfinfdpic_got_section (info)->output_section->vma;
2856 if ((bfd_get_section_flags (output_bfd,
2857 input_section->output_section)
2858 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
2859 {
2860 if (_bfinfdpic_osec_readonly_p (output_bfd,
2861 input_section
2862 ->output_section))
2863 {
2864 info->callbacks->warning
2865 (info,
2866 _("cannot emit fixups in read-only section"),
2867 name, input_bfd, input_section, rel->r_offset);
2868 return FALSE;
2869 }
2870
2871 offset = _bfd_elf_section_offset
2872 (output_bfd, info,
2873 input_section, rel->r_offset);
2874
2875 if (offset != (bfd_vma)-1)
2876 _bfinfdpic_add_rofixup (output_bfd,
2877 bfinfdpic_gotfixup_section
2878 (info),
2879 offset + input_section
2880 ->output_section->vma
2881 + input_section->output_offset,
2882 picrel);
2883 }
2884 }
2885 else if ((bfd_get_section_flags (output_bfd,
2886 input_section->output_section)
2887 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
2888 {
2889 bfd_vma offset;
2890
2891 if (_bfinfdpic_osec_readonly_p (output_bfd,
2892 input_section
2893 ->output_section))
2894 {
2895 info->callbacks->warning
2896 (info,
2897 _("cannot emit dynamic relocations in read-only section"),
2898 name, input_bfd, input_section, rel->r_offset);
2899 return FALSE;
2900 }
2901 offset = _bfd_elf_section_offset (output_bfd, info,
2902 input_section, rel->r_offset);
2903
2904 if (offset != (bfd_vma)-1)
2905 _bfinfdpic_add_dyn_reloc (output_bfd,
2906 bfinfdpic_gotrel_section (info),
2907 offset + input_section
2908 ->output_section->vma
2909 + input_section->output_offset,
2910 r_type,
2911 dynindx, addend, picrel);
2912 }
2913 else
2914 addend += bfinfdpic_got_section (info)->output_section->vma;
2915 }
2916
2917 /* We want the addend in-place because dynamic
2918 relocations are REL. Setting relocation to it should
2919 arrange for it to be installed. */
2920 relocation = addend - rel->r_addend;
2921 }
2922 check_segment[0] = check_segment[1] = got_segment;
2923 break;
2924
2925 case R_BFIN_BYTE4_DATA:
2926 if (! IS_FDPIC (output_bfd))
2927 {
2928 check_segment[0] = check_segment[1] = -1;
2929 break;
2930 }
2931 /* Fall through. */
2932 case R_BFIN_FUNCDESC_VALUE:
2933 {
2934 int dynindx;
2935 bfd_vma addend = rel->r_addend;
2936 bfd_vma offset;
2937 offset = _bfd_elf_section_offset (output_bfd, info,
2938 input_section, rel->r_offset);
2939
2940 /* If the symbol is dynamic but binds locally, use
2941 section+offset. */
2942 if (h && ! BFINFDPIC_SYM_LOCAL (info, h))
2943 {
2944 if (addend && r_type == R_BFIN_FUNCDESC_VALUE)
2945 {
2946 info->callbacks->warning
2947 (info, _("R_BFIN_FUNCDESC_VALUE references dynamic symbol with nonzero addend"),
2948 name, input_bfd, input_section, rel->r_offset);
2949 return FALSE;
2950 }
2951 dynindx = h->dynindx;
2952 }
2953 else
2954 {
2955 if (h)
2956 addend += h->root.u.def.value;
2957 else
2958 addend += sym->st_value;
2959 if (osec)
2960 addend += osec->output_offset;
2961 if (osec && osec->output_section
2962 && ! bfd_is_abs_section (osec->output_section)
2963 && ! bfd_is_und_section (osec->output_section))
2964 dynindx = elf_section_data (osec->output_section)->dynindx;
2965 else
2966 dynindx = 0;
2967 }
2968
2969 /* If we're linking an executable at a fixed address, we
2970 can omit the dynamic relocation as long as the symbol
2971 is defined in the current link unit (which is implied
2972 by its output section not being NULL). */
2973 if (info->executable && !info->pie
2974 && (!h || BFINFDPIC_SYM_LOCAL (info, h)))
2975 {
2976 if (osec)
2977 addend += osec->output_section->vma;
2978 if (IS_FDPIC (input_bfd)
2979 && (bfd_get_section_flags (output_bfd,
2980 input_section->output_section)
2981 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
2982 {
2983 if (_bfinfdpic_osec_readonly_p (output_bfd,
2984 input_section
2985 ->output_section))
2986 {
2987 info->callbacks->warning
2988 (info,
2989 _("cannot emit fixups in read-only section"),
2990 name, input_bfd, input_section, rel->r_offset);
2991 return FALSE;
2992 }
2993 if (!h || h->root.type != bfd_link_hash_undefweak)
2994 {
2995 if (offset != (bfd_vma)-1)
2996 {
2997 _bfinfdpic_add_rofixup (output_bfd,
2998 bfinfdpic_gotfixup_section
2999 (info),
3000 offset + input_section
3001 ->output_section->vma
3002 + input_section->output_offset,
3003 picrel);
3004
3005 if (r_type == R_BFIN_FUNCDESC_VALUE)
3006 _bfinfdpic_add_rofixup
3007 (output_bfd,
3008 bfinfdpic_gotfixup_section (info),
3009 offset + input_section->output_section->vma
3010 + input_section->output_offset + 4, picrel);
3011 }
3012 }
3013 }
3014 }
3015 else
3016 {
3017 if ((bfd_get_section_flags (output_bfd,
3018 input_section->output_section)
3019 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
3020 {
3021 if (_bfinfdpic_osec_readonly_p (output_bfd,
3022 input_section
3023 ->output_section))
3024 {
3025 info->callbacks->warning
3026 (info,
3027 _("cannot emit dynamic relocations in read-only section"),
3028 name, input_bfd, input_section, rel->r_offset);
3029 return FALSE;
3030 }
3031
3032 if (offset != (bfd_vma)-1)
3033 _bfinfdpic_add_dyn_reloc (output_bfd,
3034 bfinfdpic_gotrel_section (info),
3035 offset
3036 + input_section->output_section->vma
3037 + input_section->output_offset,
3038 r_type, dynindx, addend, picrel);
3039 }
3040 else if (osec)
3041 addend += osec->output_section->vma;
3042 /* We want the addend in-place because dynamic
3043 relocations are REL. Setting relocation to it
3044 should arrange for it to be installed. */
3045 relocation = addend - rel->r_addend;
3046 }
3047
3048 if (r_type == R_BFIN_FUNCDESC_VALUE)
3049 {
3050 /* If we've omitted the dynamic relocation, just emit
3051 the fixed addresses of the symbol and of the local
3052 GOT base offset. */
3053 if (info->executable && !info->pie
3054 && (!h || BFINFDPIC_SYM_LOCAL (info, h)))
3055 bfd_put_32 (output_bfd,
3056 bfinfdpic_got_section (info)->output_section->vma
3057 + bfinfdpic_got_section (info)->output_offset
3058 + bfinfdpic_got_initial_offset (info),
3059 contents + rel->r_offset + 4);
3060 else
3061 /* A function descriptor used for lazy or local
3062 resolving is initialized such that its high word
3063 contains the output section index in which the
3064 PLT entries are located, and the low word
3065 contains the offset of the lazy PLT entry entry
3066 point into that section. */
3067 bfd_put_32 (output_bfd,
3068 h && ! BFINFDPIC_SYM_LOCAL (info, h)
3069 ? 0
3070 : _bfinfdpic_osec_to_segment (output_bfd,
3071 sec
3072 ->output_section),
3073 contents + rel->r_offset + 4);
3074 }
3075 }
3076 check_segment[0] = check_segment[1] = got_segment;
3077 break;
3078
3079 default:
3080 check_segment[0] = isec_segment;
3081 check_segment[1] = sec
3082 ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section)
3083 : (unsigned)-1;
3084 break;
3085 }
3086
3087 if (check_segment[0] != check_segment[1] && IS_FDPIC (output_bfd))
3088 {
3089 #if 1 /* If you take this out, remove the #error from fdpic-static-6.d
3090 in the ld testsuite. */
3091 /* This helps catch problems in GCC while we can't do more
3092 than static linking. The idea is to test whether the
3093 input file basename is crt0.o only once. */
3094 if (silence_segment_error == 1)
3095 silence_segment_error =
3096 (strlen (input_bfd->filename) == 6
3097 && strcmp (input_bfd->filename, "crt0.o") == 0)
3098 || (strlen (input_bfd->filename) > 6
3099 && strcmp (input_bfd->filename
3100 + strlen (input_bfd->filename) - 7,
3101 "/crt0.o") == 0)
3102 ? -1 : 0;
3103 #endif
3104 if (!silence_segment_error
3105 /* We don't want duplicate errors for undefined
3106 symbols. */
3107 && !(picrel && picrel->symndx == -1
3108 && picrel->d.h->root.type == bfd_link_hash_undefined))
3109 info->callbacks->warning
3110 (info,
3111 (info->shared || info->pie)
3112 ? _("relocations between different segments are not supported")
3113 : _("warning: relocation references a different segment"),
3114 name, input_bfd, input_section, rel->r_offset);
3115 if (!silence_segment_error && (info->shared || info->pie))
3116 return FALSE;
3117 elf_elfheader (output_bfd)->e_flags |= EF_BFIN_PIC;
3118 }
3119
3120 switch (r_type)
3121 {
3122 case R_BFIN_GOTOFFHI:
3123 /* We need the addend to be applied before we shift the
3124 value right. */
3125 relocation += rel->r_addend;
3126 /* Fall through. */
3127 case R_BFIN_GOTHI:
3128 case R_BFIN_FUNCDESC_GOTHI:
3129 case R_BFIN_FUNCDESC_GOTOFFHI:
3130 relocation >>= 16;
3131 /* Fall through. */
3132
3133 case R_BFIN_GOTLO:
3134 case R_BFIN_FUNCDESC_GOTLO:
3135 case R_BFIN_GOTOFFLO:
3136 case R_BFIN_FUNCDESC_GOTOFFLO:
3137 relocation &= 0xffff;
3138 break;
3139
3140 default:
3141 break;
3142 }
3143
3144 switch (r_type)
3145 {
3146 case R_BFIN_PCREL24:
3147 case R_BFIN_PCREL24_JUMP_L:
3148 if (! IS_FDPIC (output_bfd) || ! picrel->plt)
3149 break;
3150 /* Fall through. */
3151
3152 /* When referencing a GOT entry, a function descriptor or a
3153 PLT, we don't want the addend to apply to the reference,
3154 but rather to the referenced symbol. The actual entry
3155 will have already been created taking the addend into
3156 account, so cancel it out here. */
3157 case R_BFIN_GOT17M4:
3158 case R_BFIN_GOTHI:
3159 case R_BFIN_GOTLO:
3160 case R_BFIN_FUNCDESC_GOT17M4:
3161 case R_BFIN_FUNCDESC_GOTHI:
3162 case R_BFIN_FUNCDESC_GOTLO:
3163 case R_BFIN_FUNCDESC_GOTOFF17M4:
3164 case R_BFIN_FUNCDESC_GOTOFFHI:
3165 case R_BFIN_FUNCDESC_GOTOFFLO:
3166 /* Note that we only want GOTOFFHI, not GOTOFFLO or GOTOFF17M4
3167 here, since we do want to apply the addend to the others.
3168 Note that we've applied the addend to GOTOFFHI before we
3169 shifted it right. */
3170 case R_BFIN_GOTOFFHI:
3171 relocation -= rel->r_addend;
3172 break;
3173
3174 default:
3175 break;
3176 }
3177
3178 r = bfin_final_link_relocate (rel, howto, input_bfd, input_section,
3179 contents, rel->r_offset,
3180 relocation, rel->r_addend);
3181
3182 if (r != bfd_reloc_ok)
3183 {
3184 const char * msg = (const char *) NULL;
3185
3186 switch (r)
3187 {
3188 case bfd_reloc_overflow:
3189 r = info->callbacks->reloc_overflow
3190 (info, (h ? &h->root : NULL), name, howto->name,
3191 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3192 break;
3193
3194 case bfd_reloc_undefined:
3195 r = info->callbacks->undefined_symbol
3196 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
3197 break;
3198
3199 case bfd_reloc_outofrange:
3200 msg = _("internal error: out of range error");
3201 break;
3202
3203 case bfd_reloc_notsupported:
3204 msg = _("internal error: unsupported relocation error");
3205 break;
3206
3207 case bfd_reloc_dangerous:
3208 msg = _("internal error: dangerous relocation");
3209 break;
3210
3211 default:
3212 msg = _("internal error: unknown error");
3213 break;
3214 }
3215
3216 if (msg)
3217 r = info->callbacks->warning
3218 (info, msg, name, input_bfd, input_section, rel->r_offset);
3219
3220 if (! r)
3221 return FALSE;
3222 }
3223 }
3224
3225 return TRUE;
3226 }
3227
3228 /* Update the relocation information for the relocations of the section
3229 being removed. */
3230
3231 static bfd_boolean
3232 bfinfdpic_gc_sweep_hook (bfd *abfd,
3233 struct bfd_link_info *info,
3234 asection *sec,
3235 const Elf_Internal_Rela *relocs)
3236 {
3237 Elf_Internal_Shdr *symtab_hdr;
3238 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
3239 const Elf_Internal_Rela *rel;
3240 const Elf_Internal_Rela *rel_end;
3241 struct bfinfdpic_relocs_info *picrel;
3242
3243 BFD_ASSERT (IS_FDPIC (abfd));
3244
3245 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3246 sym_hashes = elf_sym_hashes (abfd);
3247 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof(Elf32_External_Sym);
3248 if (!elf_bad_symtab (abfd))
3249 sym_hashes_end -= symtab_hdr->sh_info;
3250
3251 rel_end = relocs + sec->reloc_count;
3252 for (rel = relocs; rel < rel_end; rel++)
3253 {
3254 struct elf_link_hash_entry *h;
3255 unsigned long r_symndx;
3256
3257 r_symndx = ELF32_R_SYM (rel->r_info);
3258 if (r_symndx < symtab_hdr->sh_info)
3259 h = NULL;
3260 else
3261 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3262
3263 if (h != NULL)
3264 picrel = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info),
3265 abfd, h,
3266 rel->r_addend, NO_INSERT);
3267 else
3268 picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
3269 (info), abfd, r_symndx,
3270 rel->r_addend, NO_INSERT);
3271
3272 if (!picrel)
3273 return TRUE;
3274
3275 switch (ELF32_R_TYPE (rel->r_info))
3276 {
3277 case R_BFIN_PCREL24:
3278 case R_BFIN_PCREL24_JUMP_L:
3279 picrel->call--;
3280 break;
3281
3282 case R_BFIN_FUNCDESC_VALUE:
3283 picrel->relocsfdv--;
3284 if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
3285 picrel->relocs32++;
3286 /* Fall through. */
3287
3288 case R_BFIN_BYTE4_DATA:
3289 picrel->sym--;
3290 if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
3291 picrel->relocs32--;
3292 break;
3293
3294 case R_BFIN_GOT17M4:
3295 picrel->got17m4--;
3296 break;
3297
3298 case R_BFIN_GOTHI:
3299 case R_BFIN_GOTLO:
3300 picrel->gothilo--;
3301 break;
3302
3303 case R_BFIN_FUNCDESC_GOT17M4:
3304 picrel->fdgot17m4--;
3305 break;
3306
3307 case R_BFIN_FUNCDESC_GOTHI:
3308 case R_BFIN_FUNCDESC_GOTLO:
3309 picrel->fdgothilo--;
3310 break;
3311
3312 case R_BFIN_GOTOFF17M4:
3313 case R_BFIN_GOTOFFHI:
3314 case R_BFIN_GOTOFFLO:
3315 picrel->gotoff--;
3316 break;
3317
3318 case R_BFIN_FUNCDESC_GOTOFF17M4:
3319 picrel->fdgoff17m4--;
3320 break;
3321
3322 case R_BFIN_FUNCDESC_GOTOFFHI:
3323 case R_BFIN_FUNCDESC_GOTOFFLO:
3324 picrel->fdgoffhilo--;
3325 break;
3326
3327 case R_BFIN_FUNCDESC:
3328 picrel->fd--;
3329 picrel->relocsfd--;
3330 break;
3331
3332 default:
3333 break;
3334 }
3335 }
3336
3337 return TRUE;
3338 }
3339
3340 /* We need dynamic symbols for every section, since segments can
3341 relocate independently. */
3342 static bfd_boolean
3343 _bfinfdpic_link_omit_section_dynsym (bfd *output_bfd ATTRIBUTE_UNUSED,
3344 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3345 asection *p)
3346 {
3347 switch (elf_section_data (p)->this_hdr.sh_type)
3348 {
3349 case SHT_PROGBITS:
3350 case SHT_NOBITS:
3351 /* If sh_type is yet undecided, assume it could be
3352 SHT_PROGBITS/SHT_NOBITS. */
3353 case SHT_NULL:
3354 return FALSE;
3355
3356 /* There shouldn't be section relative relocations
3357 against any other section. */
3358 default:
3359 return TRUE;
3360 }
3361 }
3362
3363 /* Create a .got section, as well as its additional info field. This
3364 is almost entirely copied from
3365 elflink.c:_bfd_elf_create_got_section(). */
3366
3367 static bfd_boolean
3368 _bfin_create_got_section (bfd *abfd, struct bfd_link_info *info)
3369 {
3370 flagword flags, pltflags;
3371 asection *s;
3372 struct elf_link_hash_entry *h;
3373 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3374 int ptralign;
3375 int offset;
3376
3377 /* This function may be called more than once. */
3378 s = bfd_get_section_by_name (abfd, ".got");
3379 if (s != NULL && (s->flags & SEC_LINKER_CREATED) != 0)
3380 return TRUE;
3381
3382 /* Machine specific: although pointers are 32-bits wide, we want the
3383 GOT to be aligned to a 64-bit boundary, such that function
3384 descriptors in it can be accessed with 64-bit loads and
3385 stores. */
3386 ptralign = 3;
3387
3388 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3389 | SEC_LINKER_CREATED);
3390 pltflags = flags;
3391
3392 s = bfd_make_section_with_flags (abfd, ".got", flags);
3393 if (s == NULL
3394 || !bfd_set_section_alignment (abfd, s, ptralign))
3395 return FALSE;
3396
3397 if (bed->want_got_plt)
3398 {
3399 s = bfd_make_section_with_flags (abfd, ".got.plt", flags);
3400 if (s == NULL
3401 || !bfd_set_section_alignment (abfd, s, ptralign))
3402 return FALSE;
3403 }
3404
3405 if (bed->want_got_sym)
3406 {
3407 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
3408 (or .got.plt) section. We don't do this in the linker script
3409 because we don't want to define the symbol if we are not creating
3410 a global offset table. */
3411 h = _bfd_elf_define_linkage_sym (abfd, info, s, "__GLOBAL_OFFSET_TABLE_");
3412 elf_hash_table (info)->hgot = h;
3413 if (h == NULL)
3414 return FALSE;
3415
3416 /* Machine-specific: we want the symbol for executables as
3417 well. */
3418 if (! bfd_elf_link_record_dynamic_symbol (info, h))
3419 return FALSE;
3420 }
3421
3422 /* The first bit of the global offset table is the header. */
3423 s->size += bed->got_header_size;
3424
3425 /* This is the machine-specific part. Create and initialize section
3426 data for the got. */
3427 if (IS_FDPIC (abfd))
3428 {
3429 bfinfdpic_got_section (info) = s;
3430 bfinfdpic_relocs_info (info) = htab_try_create (1,
3431 bfinfdpic_relocs_info_hash,
3432 bfinfdpic_relocs_info_eq,
3433 (htab_del) NULL);
3434 if (! bfinfdpic_relocs_info (info))
3435 return FALSE;
3436
3437 s = bfd_make_section_with_flags (abfd, ".rel.got",
3438 (flags | SEC_READONLY));
3439 if (s == NULL
3440 || ! bfd_set_section_alignment (abfd, s, 2))
3441 return FALSE;
3442
3443 bfinfdpic_gotrel_section (info) = s;
3444
3445 /* Machine-specific. */
3446 s = bfd_make_section_with_flags (abfd, ".rofixup",
3447 (flags | SEC_READONLY));
3448 if (s == NULL
3449 || ! bfd_set_section_alignment (abfd, s, 2))
3450 return FALSE;
3451
3452 bfinfdpic_gotfixup_section (info) = s;
3453 offset = -2048;
3454 flags = BSF_GLOBAL;
3455 }
3456 else
3457 {
3458 offset = 2048;
3459 flags = BSF_GLOBAL | BSF_WEAK;
3460 }
3461
3462 flags = pltflags;
3463 pltflags |= SEC_CODE;
3464 if (bed->plt_not_loaded)
3465 pltflags &= ~ (SEC_CODE | SEC_LOAD | SEC_HAS_CONTENTS);
3466 if (bed->plt_readonly)
3467 pltflags |= SEC_READONLY;
3468
3469 s = bfd_make_section_with_flags (abfd, ".plt", pltflags);
3470 if (s == NULL
3471 || ! bfd_set_section_alignment (abfd, s, bed->plt_alignment))
3472 return FALSE;
3473 /* Blackfin-specific: remember it. */
3474 bfinfdpic_plt_section (info) = s;
3475
3476 if (bed->want_plt_sym)
3477 {
3478 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
3479 .plt section. */
3480 struct elf_link_hash_entry *h;
3481 struct bfd_link_hash_entry *bh = NULL;
3482
3483 if (! (_bfd_generic_link_add_one_symbol
3484 (info, abfd, "__PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s, 0, NULL,
3485 FALSE, get_elf_backend_data (abfd)->collect, &bh)))
3486 return FALSE;
3487 h = (struct elf_link_hash_entry *) bh;
3488 h->def_regular = 1;
3489 h->type = STT_OBJECT;
3490
3491 if (! info->executable
3492 && ! bfd_elf_link_record_dynamic_symbol (info, h))
3493 return FALSE;
3494 }
3495
3496 /* Blackfin-specific: we want rel relocations for the plt. */
3497 s = bfd_make_section_with_flags (abfd, ".rel.plt", flags | SEC_READONLY);
3498 if (s == NULL
3499 || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
3500 return FALSE;
3501 /* Blackfin-specific: remember it. */
3502 bfinfdpic_pltrel_section (info) = s;
3503
3504 return TRUE;
3505 }
3506
3507 /* Make sure the got and plt sections exist, and that our pointers in
3508 the link hash table point to them. */
3509
3510 static bfd_boolean
3511 elf32_bfinfdpic_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3512 {
3513 /* This is mostly copied from
3514 elflink.c:_bfd_elf_create_dynamic_sections(). */
3515 flagword flags;
3516 asection *s;
3517 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3518
3519 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3520 | SEC_LINKER_CREATED);
3521
3522 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
3523 .rel[a].bss sections. */
3524
3525 /* Blackfin-specific: we want to create the GOT in the Blackfin way. */
3526 if (! _bfin_create_got_section (abfd, info))
3527 return FALSE;
3528
3529 /* Blackfin-specific: make sure we created everything we wanted. */
3530 BFD_ASSERT (bfinfdpic_got_section (info) && bfinfdpic_gotrel_section (info)
3531 /* && bfinfdpic_gotfixup_section (info) */
3532 && bfinfdpic_plt_section (info)
3533 && bfinfdpic_pltrel_section (info));
3534
3535 if (bed->want_dynbss)
3536 {
3537 /* The .dynbss section is a place to put symbols which are defined
3538 by dynamic objects, are referenced by regular objects, and are
3539 not functions. We must allocate space for them in the process
3540 image and use a R_*_COPY reloc to tell the dynamic linker to
3541 initialize them at run time. The linker script puts the .dynbss
3542 section into the .bss section of the final image. */
3543 s = bfd_make_section_with_flags (abfd, ".dynbss",
3544 SEC_ALLOC | SEC_LINKER_CREATED);
3545 if (s == NULL)
3546 return FALSE;
3547
3548 /* The .rel[a].bss section holds copy relocs. This section is not
3549 normally needed. We need to create it here, though, so that the
3550 linker will map it to an output section. We can't just create it
3551 only if we need it, because we will not know whether we need it
3552 until we have seen all the input files, and the first time the
3553 main linker code calls BFD after examining all the input files
3554 (size_dynamic_sections) the input sections have already been
3555 mapped to the output sections. If the section turns out not to
3556 be needed, we can discard it later. We will never need this
3557 section when generating a shared object, since they do not use
3558 copy relocs. */
3559 if (! info->shared)
3560 {
3561 s = bfd_make_section_with_flags (abfd,
3562 (bed->default_use_rela_p
3563 ? ".rela.bss" : ".rel.bss"),
3564 flags | SEC_READONLY);
3565 if (s == NULL
3566 || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
3567 return FALSE;
3568 }
3569 }
3570
3571 return TRUE;
3572 }
3573
3574 /* Compute the total GOT size required by each symbol in each range.
3575 Symbols may require up to 4 words in the GOT: an entry pointing to
3576 the symbol, an entry pointing to its function descriptor, and a
3577 private function descriptors taking two words. */
3578
3579 static void
3580 _bfinfdpic_count_nontls_entries (struct bfinfdpic_relocs_info *entry,
3581 struct _bfinfdpic_dynamic_got_info *dinfo)
3582 {
3583 /* Allocate space for a GOT entry pointing to the symbol. */
3584 if (entry->got17m4)
3585 dinfo->got17m4 += 4;
3586 else if (entry->gothilo)
3587 dinfo->gothilo += 4;
3588 else
3589 entry->relocs32--;
3590 entry->relocs32++;
3591
3592 /* Allocate space for a GOT entry pointing to the function
3593 descriptor. */
3594 if (entry->fdgot17m4)
3595 dinfo->got17m4 += 4;
3596 else if (entry->fdgothilo)
3597 dinfo->gothilo += 4;
3598 else
3599 entry->relocsfd--;
3600 entry->relocsfd++;
3601
3602 /* Decide whether we need a PLT entry, a function descriptor in the
3603 GOT, and a lazy PLT entry for this symbol. */
3604 entry->plt = entry->call
3605 && entry->symndx == -1 && ! BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h)
3606 && elf_hash_table (dinfo->info)->dynamic_sections_created;
3607 entry->privfd = entry->plt
3608 || entry->fdgoff17m4 || entry->fdgoffhilo
3609 || ((entry->fd || entry->fdgot17m4 || entry->fdgothilo)
3610 && (entry->symndx != -1
3611 || BFINFDPIC_FUNCDESC_LOCAL (dinfo->info, entry->d.h)));
3612 entry->lazyplt = entry->privfd
3613 && entry->symndx == -1 && ! BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h)
3614 && ! (dinfo->info->flags & DF_BIND_NOW)
3615 && elf_hash_table (dinfo->info)->dynamic_sections_created;
3616
3617 /* Allocate space for a function descriptor. */
3618 if (entry->fdgoff17m4)
3619 dinfo->fd17m4 += 8;
3620 else if (entry->privfd && entry->plt)
3621 dinfo->fdplt += 8;
3622 else if (entry->privfd)
3623 dinfo->fdhilo += 8;
3624 else
3625 entry->relocsfdv--;
3626 entry->relocsfdv++;
3627
3628 if (entry->lazyplt)
3629 dinfo->lzplt += LZPLT_NORMAL_SIZE;
3630 }
3631
3632 /* Compute the number of dynamic relocations and fixups that a symbol
3633 requires, and add (or subtract) from the grand and per-symbol
3634 totals. */
3635
3636 static void
3637 _bfinfdpic_count_relocs_fixups (struct bfinfdpic_relocs_info *entry,
3638 struct _bfinfdpic_dynamic_got_info *dinfo,
3639 bfd_boolean subtract)
3640 {
3641 bfd_vma relocs = 0, fixups = 0;
3642
3643 if (!dinfo->info->executable || dinfo->info->pie)
3644 relocs = entry->relocs32 + entry->relocsfd + entry->relocsfdv;
3645 else
3646 {
3647 if (entry->symndx != -1 || BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h))
3648 {
3649 if (entry->symndx != -1
3650 || entry->d.h->root.type != bfd_link_hash_undefweak)
3651 fixups += entry->relocs32 + 2 * entry->relocsfdv;
3652 }
3653 else
3654 relocs += entry->relocs32 + entry->relocsfdv;
3655
3656 if (entry->symndx != -1
3657 || BFINFDPIC_FUNCDESC_LOCAL (dinfo->info, entry->d.h))
3658 {
3659 if (entry->symndx != -1
3660 || entry->d.h->root.type != bfd_link_hash_undefweak)
3661 fixups += entry->relocsfd;
3662 }
3663 else
3664 relocs += entry->relocsfd;
3665 }
3666
3667 if (subtract)
3668 {
3669 relocs = - relocs;
3670 fixups = - fixups;
3671 }
3672
3673 entry->dynrelocs += relocs;
3674 entry->fixups += fixups;
3675 dinfo->relocs += relocs;
3676 dinfo->fixups += fixups;
3677 }
3678
3679 /* Compute the total GOT and PLT size required by each symbol in each range. *
3680 Symbols may require up to 4 words in the GOT: an entry pointing to
3681 the symbol, an entry pointing to its function descriptor, and a
3682 private function descriptors taking two words. */
3683
3684 static int
3685 _bfinfdpic_count_got_plt_entries (void **entryp, void *dinfo_)
3686 {
3687 struct bfinfdpic_relocs_info *entry = *entryp;
3688 struct _bfinfdpic_dynamic_got_info *dinfo = dinfo_;
3689
3690 _bfinfdpic_count_nontls_entries (entry, dinfo);
3691
3692 _bfinfdpic_count_relocs_fixups (entry, dinfo, FALSE);
3693
3694 return 1;
3695 }
3696
3697 /* This structure is used to assign offsets to got entries, function
3698 descriptors, plt entries and lazy plt entries. */
3699
3700 struct _bfinfdpic_dynamic_got_plt_info
3701 {
3702 /* Summary information collected with _bfinfdpic_count_got_plt_entries. */
3703 struct _bfinfdpic_dynamic_got_info g;
3704
3705 /* For each addressable range, we record a MAX (positive) and MIN
3706 (negative) value. CUR is used to assign got entries, and it's
3707 incremented from an initial positive value to MAX, then from MIN
3708 to FDCUR (unless FDCUR wraps around first). FDCUR is used to
3709 assign function descriptors, and it's decreased from an initial
3710 non-positive value to MIN, then from MAX down to CUR (unless CUR
3711 wraps around first). All of MIN, MAX, CUR and FDCUR always point
3712 to even words. ODD, if non-zero, indicates an odd word to be
3713 used for the next got entry, otherwise CUR is used and
3714 incremented by a pair of words, wrapping around when it reaches
3715 MAX. FDCUR is decremented (and wrapped) before the next function
3716 descriptor is chosen. FDPLT indicates the number of remaining
3717 slots that can be used for function descriptors used only by PLT
3718 entries. */
3719 struct _bfinfdpic_dynamic_got_alloc_data
3720 {
3721 bfd_signed_vma max, cur, odd, fdcur, min;
3722 bfd_vma fdplt;
3723 } got17m4, gothilo;
3724 };
3725
3726 /* Determine the positive and negative ranges to be used by each
3727 offset range in the GOT. FDCUR and CUR, that must be aligned to a
3728 double-word boundary, are the minimum (negative) and maximum
3729 (positive) GOT offsets already used by previous ranges, except for
3730 an ODD entry that may have been left behind. GOT and FD indicate
3731 the size of GOT entries and function descriptors that must be
3732 placed within the range from -WRAP to WRAP. If there's room left,
3733 up to FDPLT bytes should be reserved for additional function
3734 descriptors. */
3735
3736 inline static bfd_signed_vma
3737 _bfinfdpic_compute_got_alloc_data (struct _bfinfdpic_dynamic_got_alloc_data *gad,
3738 bfd_signed_vma fdcur,
3739 bfd_signed_vma odd,
3740 bfd_signed_vma cur,
3741 bfd_vma got,
3742 bfd_vma fd,
3743 bfd_vma fdplt,
3744 bfd_vma wrap)
3745 {
3746 bfd_signed_vma wrapmin = -wrap;
3747
3748 /* Start at the given initial points. */
3749 gad->fdcur = fdcur;
3750 gad->cur = cur;
3751
3752 /* If we had an incoming odd word and we have any got entries that
3753 are going to use it, consume it, otherwise leave gad->odd at
3754 zero. We might force gad->odd to zero and return the incoming
3755 odd such that it is used by the next range, but then GOT entries
3756 might appear to be out of order and we wouldn't be able to
3757 shorten the GOT by one word if it turns out to end with an
3758 unpaired GOT entry. */
3759 if (odd && got)
3760 {
3761 gad->odd = odd;
3762 got -= 4;
3763 odd = 0;
3764 }
3765 else
3766 gad->odd = 0;
3767
3768 /* If we're left with an unpaired GOT entry, compute its location
3769 such that we can return it. Otherwise, if got doesn't require an
3770 odd number of words here, either odd was already zero in the
3771 block above, or it was set to zero because got was non-zero, or
3772 got was already zero. In the latter case, we want the value of
3773 odd to carry over to the return statement, so we don't want to
3774 reset odd unless the condition below is true. */
3775 if (got & 4)
3776 {
3777 odd = cur + got;
3778 got += 4;
3779 }
3780
3781 /* Compute the tentative boundaries of this range. */
3782 gad->max = cur + got;
3783 gad->min = fdcur - fd;
3784 gad->fdplt = 0;
3785
3786 /* If function descriptors took too much space, wrap some of them
3787 around. */
3788 if (gad->min < wrapmin)
3789 {
3790 gad->max += wrapmin - gad->min;
3791 gad->min = wrapmin;
3792 }
3793 /* If there is space left and we have function descriptors
3794 referenced in PLT entries that could take advantage of shorter
3795 offsets, place them here. */
3796 else if (fdplt && gad->min > wrapmin)
3797 {
3798 bfd_vma fds;
3799 if ((bfd_vma) (gad->min - wrapmin) < fdplt)
3800 fds = gad->min - wrapmin;
3801 else
3802 fds = fdplt;
3803
3804 fdplt -= fds;
3805 gad->min -= fds;
3806 gad->fdplt += fds;
3807 }
3808
3809 /* If GOT entries took too much space, wrap some of them around.
3810 This may well cause gad->min to become lower than wrapmin. This
3811 will cause a relocation overflow later on, so we don't have to
3812 report it here . */
3813 if ((bfd_vma) gad->max > wrap)
3814 {
3815 gad->min -= gad->max - wrap;
3816 gad->max = wrap;
3817 }
3818 /* If there is more space left, try to place some more function
3819 descriptors for PLT entries. */
3820 else if (fdplt && (bfd_vma) gad->max < wrap)
3821 {
3822 bfd_vma fds;
3823 if ((bfd_vma) (wrap - gad->max) < fdplt)
3824 fds = wrap - gad->max;
3825 else
3826 fds = fdplt;
3827
3828 fdplt -= fds;
3829 gad->max += fds;
3830 gad->fdplt += fds;
3831 }
3832
3833 /* If odd was initially computed as an offset past the wrap point,
3834 wrap it around. */
3835 if (odd > gad->max)
3836 odd = gad->min + odd - gad->max;
3837
3838 /* _bfinfdpic_get_got_entry() below will always wrap gad->cur if needed
3839 before returning, so do it here too. This guarantees that,
3840 should cur and fdcur meet at the wrap point, they'll both be
3841 equal to min. */
3842 if (gad->cur == gad->max)
3843 gad->cur = gad->min;
3844
3845 return odd;
3846 }
3847
3848 /* Compute the location of the next GOT entry, given the allocation
3849 data for a range. */
3850
3851 inline static bfd_signed_vma
3852 _bfinfdpic_get_got_entry (struct _bfinfdpic_dynamic_got_alloc_data *gad)
3853 {
3854 bfd_signed_vma ret;
3855
3856 if (gad->odd)
3857 {
3858 /* If there was an odd word left behind, use it. */
3859 ret = gad->odd;
3860 gad->odd = 0;
3861 }
3862 else
3863 {
3864 /* Otherwise, use the word pointed to by cur, reserve the next
3865 as an odd word, and skip to the next pair of words, possibly
3866 wrapping around. */
3867 ret = gad->cur;
3868 gad->odd = gad->cur + 4;
3869 gad->cur += 8;
3870 if (gad->cur == gad->max)
3871 gad->cur = gad->min;
3872 }
3873
3874 return ret;
3875 }
3876
3877 /* Compute the location of the next function descriptor entry in the
3878 GOT, given the allocation data for a range. */
3879
3880 inline static bfd_signed_vma
3881 _bfinfdpic_get_fd_entry (struct _bfinfdpic_dynamic_got_alloc_data *gad)
3882 {
3883 /* If we're at the bottom, wrap around, and only then allocate the
3884 next pair of words. */
3885 if (gad->fdcur == gad->min)
3886 gad->fdcur = gad->max;
3887 return gad->fdcur -= 8;
3888 }
3889
3890 /* Assign GOT offsets for every GOT entry and function descriptor.
3891 Doing everything in a single pass is tricky. */
3892
3893 static int
3894 _bfinfdpic_assign_got_entries (void **entryp, void *info_)
3895 {
3896 struct bfinfdpic_relocs_info *entry = *entryp;
3897 struct _bfinfdpic_dynamic_got_plt_info *dinfo = info_;
3898
3899 if (entry->got17m4)
3900 entry->got_entry = _bfinfdpic_get_got_entry (&dinfo->got17m4);
3901 else if (entry->gothilo)
3902 entry->got_entry = _bfinfdpic_get_got_entry (&dinfo->gothilo);
3903
3904 if (entry->fdgot17m4)
3905 entry->fdgot_entry = _bfinfdpic_get_got_entry (&dinfo->got17m4);
3906 else if (entry->fdgothilo)
3907 entry->fdgot_entry = _bfinfdpic_get_got_entry (&dinfo->gothilo);
3908
3909 if (entry->fdgoff17m4)
3910 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4);
3911 else if (entry->plt && dinfo->got17m4.fdplt)
3912 {
3913 dinfo->got17m4.fdplt -= 8;
3914 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4);
3915 }
3916 else if (entry->plt)
3917 {
3918 dinfo->gothilo.fdplt -= 8;
3919 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo);
3920 }
3921 else if (entry->privfd)
3922 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo);
3923
3924 return 1;
3925 }
3926
3927 /* Assign GOT offsets to private function descriptors used by PLT
3928 entries (or referenced by 32-bit offsets), as well as PLT entries
3929 and lazy PLT entries. */
3930
3931 static int
3932 _bfinfdpic_assign_plt_entries (void **entryp, void *info_)
3933 {
3934 struct bfinfdpic_relocs_info *entry = *entryp;
3935 struct _bfinfdpic_dynamic_got_plt_info *dinfo = info_;
3936
3937 /* If this symbol requires a local function descriptor, allocate
3938 one. */
3939 if (entry->privfd && entry->fd_entry == 0)
3940 {
3941 if (dinfo->got17m4.fdplt)
3942 {
3943 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4);
3944 dinfo->got17m4.fdplt -= 8;
3945 }
3946 else
3947 {
3948 BFD_ASSERT (dinfo->gothilo.fdplt);
3949 entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo);
3950 dinfo->gothilo.fdplt -= 8;
3951 }
3952 }
3953
3954 if (entry->plt)
3955 {
3956 int size;
3957
3958 /* We use the section's raw size to mark the location of the
3959 next PLT entry. */
3960 entry->plt_entry = bfinfdpic_plt_section (dinfo->g.info)->size;
3961
3962 /* Figure out the length of this PLT entry based on the
3963 addressing mode we need to reach the function descriptor. */
3964 BFD_ASSERT (entry->fd_entry);
3965 if (entry->fd_entry >= -(1 << (18 - 1))
3966 && entry->fd_entry + 4 < (1 << (18 - 1)))
3967 size = 10;
3968 else
3969 size = 16;
3970
3971 bfinfdpic_plt_section (dinfo->g.info)->size += size;
3972 }
3973
3974 if (entry->lazyplt)
3975 {
3976 entry->lzplt_entry = dinfo->g.lzplt;
3977 dinfo->g.lzplt += LZPLT_NORMAL_SIZE;
3978 /* If this entry is the one that gets the resolver stub, account
3979 for the additional instruction. */
3980 if (entry->lzplt_entry % BFINFDPIC_LZPLT_BLOCK_SIZE
3981 == BFINFDPIC_LZPLT_RESOLV_LOC)
3982 dinfo->g.lzplt += LZPLT_RESOLVER_EXTRA;
3983 }
3984
3985 return 1;
3986 }
3987
3988 /* Cancel out any effects of calling _bfinfdpic_assign_got_entries and
3989 _bfinfdpic_assign_plt_entries. */
3990
3991 static int
3992 _bfinfdpic_reset_got_plt_entries (void **entryp, void *ignore ATTRIBUTE_UNUSED)
3993 {
3994 struct bfinfdpic_relocs_info *entry = *entryp;
3995
3996 entry->got_entry = 0;
3997 entry->fdgot_entry = 0;
3998 entry->fd_entry = 0;
3999 entry->plt_entry = (bfd_vma)-1;
4000 entry->lzplt_entry = (bfd_vma)-1;
4001
4002 return 1;
4003 }
4004
4005 /* Follow indirect and warning hash entries so that each got entry
4006 points to the final symbol definition. P must point to a pointer
4007 to the hash table we're traversing. Since this traversal may
4008 modify the hash table, we set this pointer to NULL to indicate
4009 we've made a potentially-destructive change to the hash table, so
4010 the traversal must be restarted. */
4011 static int
4012 _bfinfdpic_resolve_final_relocs_info (void **entryp, void *p)
4013 {
4014 struct bfinfdpic_relocs_info *entry = *entryp;
4015 htab_t *htab = p;
4016
4017 if (entry->symndx == -1)
4018 {
4019 struct elf_link_hash_entry *h = entry->d.h;
4020 struct bfinfdpic_relocs_info *oentry;
4021
4022 while (h->root.type == bfd_link_hash_indirect
4023 || h->root.type == bfd_link_hash_warning)
4024 h = (struct elf_link_hash_entry *)h->root.u.i.link;
4025
4026 if (entry->d.h == h)
4027 return 1;
4028
4029 oentry = bfinfdpic_relocs_info_for_global (*htab, 0, h, entry->addend,
4030 NO_INSERT);
4031
4032 if (oentry)
4033 {
4034 /* Merge the two entries. */
4035 bfinfdpic_pic_merge_early_relocs_info (oentry, entry);
4036 htab_clear_slot (*htab, entryp);
4037 return 1;
4038 }
4039
4040 entry->d.h = h;
4041
4042 /* If we can't find this entry with the new bfd hash, re-insert
4043 it, and get the traversal restarted. */
4044 if (! htab_find (*htab, entry))
4045 {
4046 htab_clear_slot (*htab, entryp);
4047 entryp = htab_find_slot (*htab, entry, INSERT);
4048 if (! *entryp)
4049 *entryp = entry;
4050 /* Abort the traversal, since the whole table may have
4051 moved, and leave it up to the parent to restart the
4052 process. */
4053 *(htab_t *)p = NULL;
4054 return 0;
4055 }
4056 }
4057
4058 return 1;
4059 }
4060
4061 /* Compute the total size of the GOT, the PLT, the dynamic relocations
4062 section and the rofixup section. Assign locations for GOT and PLT
4063 entries. */
4064
4065 static bfd_boolean
4066 _bfinfdpic_size_got_plt (bfd *output_bfd,
4067 struct _bfinfdpic_dynamic_got_plt_info *gpinfop)
4068 {
4069 bfd_signed_vma odd;
4070 bfd_vma limit;
4071 struct bfd_link_info *info = gpinfop->g.info;
4072 bfd *dynobj = elf_hash_table (info)->dynobj;
4073
4074 memcpy (bfinfdpic_dynamic_got_plt_info (info), &gpinfop->g,
4075 sizeof (gpinfop->g));
4076
4077 odd = 12;
4078 /* Compute the total size taken by entries in the 18-bit range,
4079 to tell how many PLT function descriptors we can bring into it
4080 without causing it to overflow. */
4081 limit = odd + gpinfop->g.got17m4 + gpinfop->g.fd17m4;
4082 if (limit < (bfd_vma)1 << 18)
4083 limit = ((bfd_vma)1 << 18) - limit;
4084 else
4085 limit = 0;
4086 if (gpinfop->g.fdplt < limit)
4087 limit = gpinfop->g.fdplt;
4088
4089 /* Determine the ranges of GOT offsets that we can use for each
4090 range of addressing modes. */
4091 odd = _bfinfdpic_compute_got_alloc_data (&gpinfop->got17m4,
4092 0,
4093 odd,
4094 16,
4095 gpinfop->g.got17m4,
4096 gpinfop->g.fd17m4,
4097 limit,
4098 (bfd_vma)1 << (18-1));
4099 odd = _bfinfdpic_compute_got_alloc_data (&gpinfop->gothilo,
4100 gpinfop->got17m4.min,
4101 odd,
4102 gpinfop->got17m4.max,
4103 gpinfop->g.gothilo,
4104 gpinfop->g.fdhilo,
4105 gpinfop->g.fdplt - gpinfop->got17m4.fdplt,
4106 (bfd_vma)1 << (32-1));
4107
4108 /* Now assign (most) GOT offsets. */
4109 htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_assign_got_entries,
4110 gpinfop);
4111
4112 bfinfdpic_got_section (info)->size = gpinfop->gothilo.max
4113 - gpinfop->gothilo.min
4114 /* If an odd word is the last word of the GOT, we don't need this
4115 word to be part of the GOT. */
4116 - (odd + 4 == gpinfop->gothilo.max ? 4 : 0);
4117 if (bfinfdpic_got_section (info)->size == 0)
4118 bfinfdpic_got_section (info)->flags |= SEC_EXCLUDE;
4119 else if (bfinfdpic_got_section (info)->size == 12
4120 && ! elf_hash_table (info)->dynamic_sections_created)
4121 {
4122 bfinfdpic_got_section (info)->flags |= SEC_EXCLUDE;
4123 bfinfdpic_got_section (info)->size = 0;
4124 }
4125 else
4126 {
4127 bfinfdpic_got_section (info)->contents =
4128 (bfd_byte *) bfd_zalloc (dynobj,
4129 bfinfdpic_got_section (info)->size);
4130 if (bfinfdpic_got_section (info)->contents == NULL)
4131 return FALSE;
4132 }
4133
4134 if (elf_hash_table (info)->dynamic_sections_created)
4135 /* Subtract the number of lzplt entries, since those will generate
4136 relocations in the pltrel section. */
4137 bfinfdpic_gotrel_section (info)->size =
4138 (gpinfop->g.relocs - gpinfop->g.lzplt / LZPLT_NORMAL_SIZE)
4139 * get_elf_backend_data (output_bfd)->s->sizeof_rel;
4140 else
4141 BFD_ASSERT (gpinfop->g.relocs == 0);
4142 if (bfinfdpic_gotrel_section (info)->size == 0)
4143 bfinfdpic_gotrel_section (info)->flags |= SEC_EXCLUDE;
4144 else
4145 {
4146 bfinfdpic_gotrel_section (info)->contents =
4147 (bfd_byte *) bfd_zalloc (dynobj,
4148 bfinfdpic_gotrel_section (info)->size);
4149 if (bfinfdpic_gotrel_section (info)->contents == NULL)
4150 return FALSE;
4151 }
4152
4153 bfinfdpic_gotfixup_section (info)->size = (gpinfop->g.fixups + 1) * 4;
4154 if (bfinfdpic_gotfixup_section (info)->size == 0)
4155 bfinfdpic_gotfixup_section (info)->flags |= SEC_EXCLUDE;
4156 else
4157 {
4158 bfinfdpic_gotfixup_section (info)->contents =
4159 (bfd_byte *) bfd_zalloc (dynobj,
4160 bfinfdpic_gotfixup_section (info)->size);
4161 if (bfinfdpic_gotfixup_section (info)->contents == NULL)
4162 return FALSE;
4163 }
4164
4165 if (elf_hash_table (info)->dynamic_sections_created)
4166 {
4167 bfinfdpic_pltrel_section (info)->size =
4168 gpinfop->g.lzplt / LZPLT_NORMAL_SIZE * get_elf_backend_data (output_bfd)->s->sizeof_rel;
4169 if (bfinfdpic_pltrel_section (info)->size == 0)
4170 bfinfdpic_pltrel_section (info)->flags |= SEC_EXCLUDE;
4171 else
4172 {
4173 bfinfdpic_pltrel_section (info)->contents =
4174 (bfd_byte *) bfd_zalloc (dynobj,
4175 bfinfdpic_pltrel_section (info)->size);
4176 if (bfinfdpic_pltrel_section (info)->contents == NULL)
4177 return FALSE;
4178 }
4179 }
4180
4181 /* Add 4 bytes for every block of at most 65535 lazy PLT entries,
4182 such that there's room for the additional instruction needed to
4183 call the resolver. Since _bfinfdpic_assign_got_entries didn't
4184 account for them, our block size is 4 bytes smaller than the real
4185 block size. */
4186 if (elf_hash_table (info)->dynamic_sections_created)
4187 {
4188 bfinfdpic_plt_section (info)->size = gpinfop->g.lzplt
4189 + ((gpinfop->g.lzplt + (BFINFDPIC_LZPLT_BLOCK_SIZE - 4) - LZPLT_NORMAL_SIZE)
4190 / (BFINFDPIC_LZPLT_BLOCK_SIZE - 4) * LZPLT_RESOLVER_EXTRA);
4191 }
4192
4193 /* Reset it, such that _bfinfdpic_assign_plt_entries() can use it to
4194 actually assign lazy PLT entries addresses. */
4195 gpinfop->g.lzplt = 0;
4196
4197 /* Save information that we're going to need to generate GOT and PLT
4198 entries. */
4199 bfinfdpic_got_initial_offset (info) = -gpinfop->gothilo.min;
4200
4201 if (get_elf_backend_data (output_bfd)->want_got_sym)
4202 elf_hash_table (info)->hgot->root.u.def.value
4203 = bfinfdpic_got_initial_offset (info);
4204
4205 if (elf_hash_table (info)->dynamic_sections_created)
4206 bfinfdpic_plt_initial_offset (info) =
4207 bfinfdpic_plt_section (info)->size;
4208
4209 htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_assign_plt_entries,
4210 gpinfop);
4211
4212 /* Allocate the PLT section contents only after
4213 _bfinfdpic_assign_plt_entries has a chance to add the size of the
4214 non-lazy PLT entries. */
4215 if (elf_hash_table (info)->dynamic_sections_created)
4216 {
4217 if (bfinfdpic_plt_section (info)->size == 0)
4218 bfinfdpic_plt_section (info)->flags |= SEC_EXCLUDE;
4219 else
4220 {
4221 bfinfdpic_plt_section (info)->contents =
4222 (bfd_byte *) bfd_zalloc (dynobj,
4223 bfinfdpic_plt_section (info)->size);
4224 if (bfinfdpic_plt_section (info)->contents == NULL)
4225 return FALSE;
4226 }
4227 }
4228
4229 return TRUE;
4230 }
4231
4232 /* Set the sizes of the dynamic sections. */
4233
4234 static bfd_boolean
4235 elf32_bfinfdpic_size_dynamic_sections (bfd *output_bfd,
4236 struct bfd_link_info *info)
4237 {
4238 struct elf_link_hash_table *htab;
4239 bfd *dynobj;
4240 asection *s;
4241 struct _bfinfdpic_dynamic_got_plt_info gpinfo;
4242
4243 htab = elf_hash_table (info);
4244 dynobj = htab->dynobj;
4245 BFD_ASSERT (dynobj != NULL);
4246
4247 if (htab->dynamic_sections_created)
4248 {
4249 /* Set the contents of the .interp section to the interpreter. */
4250 if (info->executable)
4251 {
4252 s = bfd_get_section_by_name (dynobj, ".interp");
4253 BFD_ASSERT (s != NULL);
4254 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4255 s->contents = (bfd_byte *) ELF_DYNAMIC_INTERPRETER;
4256 }
4257 }
4258
4259 memset (&gpinfo, 0, sizeof (gpinfo));
4260 gpinfo.g.info = info;
4261
4262 for (;;)
4263 {
4264 htab_t relocs = bfinfdpic_relocs_info (info);
4265
4266 htab_traverse (relocs, _bfinfdpic_resolve_final_relocs_info, &relocs);
4267
4268 if (relocs == bfinfdpic_relocs_info (info))
4269 break;
4270 }
4271
4272 htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_count_got_plt_entries,
4273 &gpinfo.g);
4274
4275 /* Allocate space to save the summary information, we're going to
4276 use it if we're doing relaxations. */
4277 bfinfdpic_dynamic_got_plt_info (info) = bfd_alloc (dynobj, sizeof (gpinfo.g));
4278
4279 if (!_bfinfdpic_size_got_plt (output_bfd, &gpinfo))
4280 return FALSE;
4281
4282 if (elf_hash_table (info)->dynamic_sections_created)
4283 {
4284 if (bfinfdpic_got_section (info)->size)
4285 if (!_bfd_elf_add_dynamic_entry (info, DT_PLTGOT, 0))
4286 return FALSE;
4287
4288 if (bfinfdpic_pltrel_section (info)->size)
4289 if (!_bfd_elf_add_dynamic_entry (info, DT_PLTRELSZ, 0)
4290 || !_bfd_elf_add_dynamic_entry (info, DT_PLTREL, DT_REL)
4291 || !_bfd_elf_add_dynamic_entry (info, DT_JMPREL, 0))
4292 return FALSE;
4293
4294 if (bfinfdpic_gotrel_section (info)->size)
4295 if (!_bfd_elf_add_dynamic_entry (info, DT_REL, 0)
4296 || !_bfd_elf_add_dynamic_entry (info, DT_RELSZ, 0)
4297 || !_bfd_elf_add_dynamic_entry (info, DT_RELENT,
4298 sizeof (Elf32_External_Rel)))
4299 return FALSE;
4300 }
4301
4302 return TRUE;
4303 }
4304
4305 static bfd_boolean
4306 elf32_bfinfdpic_always_size_sections (bfd *output_bfd,
4307 struct bfd_link_info *info)
4308 {
4309 if (!info->relocatable)
4310 {
4311 struct elf_link_hash_entry *h;
4312
4313 /* Force a PT_GNU_STACK segment to be created. */
4314 if (! elf_tdata (output_bfd)->stack_flags)
4315 elf_tdata (output_bfd)->stack_flags = PF_R | PF_W | PF_X;
4316
4317 /* Define __stacksize if it's not defined yet. */
4318 h = elf_link_hash_lookup (elf_hash_table (info), "__stacksize",
4319 FALSE, FALSE, FALSE);
4320 if (! h || h->root.type != bfd_link_hash_defined
4321 || h->type != STT_OBJECT
4322 || !h->def_regular)
4323 {
4324 struct bfd_link_hash_entry *bh = NULL;
4325
4326 if (!(_bfd_generic_link_add_one_symbol
4327 (info, output_bfd, "__stacksize",
4328 BSF_GLOBAL, bfd_abs_section_ptr, DEFAULT_STACK_SIZE,
4329 (const char *) NULL, FALSE,
4330 get_elf_backend_data (output_bfd)->collect, &bh)))
4331 return FALSE;
4332
4333 h = (struct elf_link_hash_entry *) bh;
4334 h->def_regular = 1;
4335 h->type = STT_OBJECT;
4336 }
4337 }
4338
4339 return TRUE;
4340 }
4341
4342 /* Check whether any of the relocations was optimized away, and
4343 subtract it from the relocation or fixup count. */
4344 static bfd_boolean
4345 _bfinfdpic_check_discarded_relocs (bfd *abfd, asection *sec,
4346 struct bfd_link_info *info,
4347
4348 bfd_boolean *changed)
4349 {
4350 Elf_Internal_Shdr *symtab_hdr;
4351 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4352 Elf_Internal_Rela *rel, *erel;
4353
4354 if ((sec->flags & SEC_RELOC) == 0
4355 || sec->reloc_count == 0)
4356 return TRUE;
4357
4358 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4359 sym_hashes = elf_sym_hashes (abfd);
4360 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof(Elf32_External_Sym);
4361 if (!elf_bad_symtab (abfd))
4362 sym_hashes_end -= symtab_hdr->sh_info;
4363
4364 rel = elf_section_data (sec)->relocs;
4365
4366 /* Now examine each relocation. */
4367 for (erel = rel + sec->reloc_count; rel < erel; rel++)
4368 {
4369 struct elf_link_hash_entry *h;
4370 unsigned long r_symndx;
4371 struct bfinfdpic_relocs_info *picrel;
4372 struct _bfinfdpic_dynamic_got_info *dinfo;
4373
4374 if (ELF32_R_TYPE (rel->r_info) != R_BFIN_BYTE4_DATA
4375 && ELF32_R_TYPE (rel->r_info) != R_BFIN_FUNCDESC)
4376 continue;
4377
4378 if (_bfd_elf_section_offset (sec->output_section->owner,
4379 info, sec, rel->r_offset)
4380 != (bfd_vma)-1)
4381 continue;
4382
4383 r_symndx = ELF32_R_SYM (rel->r_info);
4384 if (r_symndx < symtab_hdr->sh_info)
4385 h = NULL;
4386 else
4387 {
4388 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4389 while (h->root.type == bfd_link_hash_indirect
4390 || h->root.type == bfd_link_hash_warning)
4391 h = (struct elf_link_hash_entry *)h->root.u.i.link;
4392 }
4393
4394 if (h != NULL)
4395 picrel = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info),
4396 abfd, h,
4397 rel->r_addend, NO_INSERT);
4398 else
4399 picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info (info),
4400 abfd, r_symndx,
4401 rel->r_addend, NO_INSERT);
4402
4403 if (! picrel)
4404 return FALSE;
4405
4406 *changed = TRUE;
4407 dinfo = bfinfdpic_dynamic_got_plt_info (info);
4408
4409 _bfinfdpic_count_relocs_fixups (picrel, dinfo, TRUE);
4410 if (ELF32_R_TYPE (rel->r_info) == R_BFIN_BYTE4_DATA)
4411 picrel->relocs32--;
4412 else /* we know (ELF32_R_TYPE (rel->r_info) == R_BFIN_FUNCDESC) */
4413 picrel->relocsfd--;
4414 _bfinfdpic_count_relocs_fixups (picrel, dinfo, FALSE);
4415 }
4416
4417 return TRUE;
4418 }
4419
4420 static bfd_boolean
4421 bfinfdpic_elf_discard_info (bfd *ibfd,
4422 struct elf_reloc_cookie *cookie ATTRIBUTE_UNUSED,
4423 struct bfd_link_info *info)
4424 {
4425 bfd_boolean changed = FALSE;
4426 asection *s;
4427 bfd *obfd = NULL;
4428
4429 /* Account for relaxation of .eh_frame section. */
4430 for (s = ibfd->sections; s; s = s->next)
4431 if (s->sec_info_type == ELF_INFO_TYPE_EH_FRAME)
4432 {
4433 if (!_bfinfdpic_check_discarded_relocs (ibfd, s, info, &changed))
4434 return FALSE;
4435 obfd = s->output_section->owner;
4436 }
4437
4438 if (changed)
4439 {
4440 struct _bfinfdpic_dynamic_got_plt_info gpinfo;
4441
4442 memset (&gpinfo, 0, sizeof (gpinfo));
4443 memcpy (&gpinfo.g, bfinfdpic_dynamic_got_plt_info (info),
4444 sizeof (gpinfo.g));
4445
4446 /* Clear GOT and PLT assignments. */
4447 htab_traverse (bfinfdpic_relocs_info (info),
4448 _bfinfdpic_reset_got_plt_entries,
4449 NULL);
4450
4451 if (!_bfinfdpic_size_got_plt (obfd, &gpinfo))
4452 return FALSE;
4453 }
4454
4455 return TRUE;
4456 }
4457
4458 static bfd_boolean
4459 elf32_bfinfdpic_modify_program_headers (bfd *output_bfd,
4460 struct bfd_link_info *info)
4461 {
4462 struct elf_obj_tdata *tdata = elf_tdata (output_bfd);
4463 struct elf_segment_map *m;
4464 Elf_Internal_Phdr *p;
4465
4466 /* objcopy and strip preserve what's already there using
4467 elf32_bfinfdpic_copy_private_bfd_data (). */
4468 if (! info)
4469 return TRUE;
4470
4471 for (p = tdata->phdr, m = tdata->segment_map; m != NULL; m = m->next, p++)
4472 if (m->p_type == PT_GNU_STACK)
4473 break;
4474
4475 if (m)
4476 {
4477 struct elf_link_hash_entry *h;
4478
4479 /* Obtain the pointer to the __stacksize symbol. */
4480 h = elf_link_hash_lookup (elf_hash_table (info), "__stacksize",
4481 FALSE, FALSE, FALSE);
4482 if (h)
4483 {
4484 while (h->root.type == bfd_link_hash_indirect
4485 || h->root.type == bfd_link_hash_warning)
4486 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4487 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
4488 }
4489
4490 /* Set the header p_memsz from the symbol value. We
4491 intentionally ignore the symbol section. */
4492 if (h && h->root.type == bfd_link_hash_defined)
4493 p->p_memsz = h->root.u.def.value;
4494 else
4495 p->p_memsz = DEFAULT_STACK_SIZE;
4496
4497 p->p_align = 8;
4498 }
4499
4500 return TRUE;
4501 }
4502
4503 static bfd_boolean
4504 elf32_bfinfdpic_finish_dynamic_sections (bfd *output_bfd,
4505 struct bfd_link_info *info)
4506 {
4507 bfd *dynobj;
4508 asection *sdyn;
4509
4510 dynobj = elf_hash_table (info)->dynobj;
4511
4512 if (bfinfdpic_got_section (info))
4513 {
4514 BFD_ASSERT (bfinfdpic_gotrel_section (info)->size
4515 == (bfinfdpic_gotrel_section (info)->reloc_count
4516 * sizeof (Elf32_External_Rel)));
4517
4518 if (bfinfdpic_gotfixup_section (info))
4519 {
4520 struct elf_link_hash_entry *hgot = elf_hash_table (info)->hgot;
4521 bfd_vma got_value = hgot->root.u.def.value
4522 + hgot->root.u.def.section->output_section->vma
4523 + hgot->root.u.def.section->output_offset;
4524
4525 _bfinfdpic_add_rofixup (output_bfd, bfinfdpic_gotfixup_section (info),
4526 got_value, 0);
4527
4528 if (bfinfdpic_gotfixup_section (info)->size
4529 != (bfinfdpic_gotfixup_section (info)->reloc_count * 4))
4530 {
4531 (*_bfd_error_handler)
4532 ("LINKER BUG: .rofixup section size mismatch");
4533 return FALSE;
4534 }
4535 }
4536 }
4537 if (elf_hash_table (info)->dynamic_sections_created)
4538 {
4539 BFD_ASSERT (bfinfdpic_pltrel_section (info)->size
4540 == (bfinfdpic_pltrel_section (info)->reloc_count
4541 * sizeof (Elf32_External_Rel)));
4542 }
4543
4544 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
4545
4546 if (elf_hash_table (info)->dynamic_sections_created)
4547 {
4548 Elf32_External_Dyn * dyncon;
4549 Elf32_External_Dyn * dynconend;
4550
4551 BFD_ASSERT (sdyn != NULL);
4552
4553 dyncon = (Elf32_External_Dyn *) sdyn->contents;
4554 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
4555
4556 for (; dyncon < dynconend; dyncon++)
4557 {
4558 Elf_Internal_Dyn dyn;
4559
4560 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4561
4562 switch (dyn.d_tag)
4563 {
4564 default:
4565 break;
4566
4567 case DT_PLTGOT:
4568 dyn.d_un.d_ptr = bfinfdpic_got_section (info)->output_section->vma
4569 + bfinfdpic_got_section (info)->output_offset
4570 + bfinfdpic_got_initial_offset (info);
4571 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4572 break;
4573
4574 case DT_JMPREL:
4575 dyn.d_un.d_ptr = bfinfdpic_pltrel_section (info)
4576 ->output_section->vma
4577 + bfinfdpic_pltrel_section (info)->output_offset;
4578 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4579 break;
4580
4581 case DT_PLTRELSZ:
4582 dyn.d_un.d_val = bfinfdpic_pltrel_section (info)->size;
4583 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4584 break;
4585 }
4586 }
4587 }
4588
4589 return TRUE;
4590 }
4591
4592 /* Adjust a symbol defined by a dynamic object and referenced by a
4593 regular object. */
4594
4595 static bfd_boolean
4596 elf32_bfinfdpic_adjust_dynamic_symbol
4597 (struct bfd_link_info *info,
4598 struct elf_link_hash_entry *h)
4599 {
4600 bfd * dynobj;
4601
4602 dynobj = elf_hash_table (info)->dynobj;
4603
4604 /* Make sure we know what is going on here. */
4605 BFD_ASSERT (dynobj != NULL
4606 && (h->u.weakdef != NULL
4607 || (h->def_dynamic
4608 && h->ref_regular
4609 && !h->def_regular)));
4610
4611 /* If this is a weak symbol, and there is a real definition, the
4612 processor independent code will have arranged for us to see the
4613 real definition first, and we can just use the same value. */
4614 if (h->u.weakdef != NULL)
4615 {
4616 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4617 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4618 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4619 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4620 }
4621
4622 return TRUE;
4623 }
4624
4625 /* Perform any actions needed for dynamic symbols. */
4626
4627 static bfd_boolean
4628 elf32_bfinfdpic_finish_dynamic_symbol
4629 (bfd *output_bfd ATTRIBUTE_UNUSED,
4630 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4631 struct elf_link_hash_entry *h ATTRIBUTE_UNUSED,
4632 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
4633 {
4634 return TRUE;
4635 }
4636
4637 /* Decide whether to attempt to turn absptr or lsda encodings in
4638 shared libraries into pcrel within the given input section. */
4639
4640 static bfd_boolean
4641 bfinfdpic_elf_use_relative_eh_frame
4642 (bfd *input_bfd ATTRIBUTE_UNUSED,
4643 struct bfd_link_info *info ATTRIBUTE_UNUSED,
4644 asection *eh_frame_section ATTRIBUTE_UNUSED)
4645 {
4646 /* We can't use PC-relative encodings in FDPIC binaries, in general. */
4647 return FALSE;
4648 }
4649
4650 /* Adjust the contents of an eh_frame_hdr section before they're output. */
4651
4652 static bfd_byte
4653 bfinfdpic_elf_encode_eh_address (bfd *abfd,
4654 struct bfd_link_info *info,
4655 asection *osec, bfd_vma offset,
4656 asection *loc_sec, bfd_vma loc_offset,
4657 bfd_vma *encoded)
4658 {
4659 struct elf_link_hash_entry *h;
4660
4661 h = elf_hash_table (info)->hgot;
4662 BFD_ASSERT (h && h->root.type == bfd_link_hash_defined);
4663
4664 if (! h || (_bfinfdpic_osec_to_segment (abfd, osec)
4665 == _bfinfdpic_osec_to_segment (abfd, loc_sec->output_section)))
4666 return _bfd_elf_encode_eh_address (abfd, info, osec, offset,
4667 loc_sec, loc_offset, encoded);
4668
4669 BFD_ASSERT (_bfinfdpic_osec_to_segment (abfd, osec)
4670 == (_bfinfdpic_osec_to_segment
4671 (abfd, h->root.u.def.section->output_section)));
4672
4673 *encoded = osec->vma + offset
4674 - (h->root.u.def.value
4675 + h->root.u.def.section->output_section->vma
4676 + h->root.u.def.section->output_offset);
4677
4678 return DW_EH_PE_datarel | DW_EH_PE_sdata4;
4679 }
4680
4681
4682
4683 /* Look through the relocs for a section during the first phase.
4684
4685 Besides handling virtual table relocs for gc, we have to deal with
4686 all sorts of PIC-related relocations. We describe below the
4687 general plan on how to handle such relocations, even though we only
4688 collect information at this point, storing them in hash tables for
4689 perusal of later passes.
4690
4691 32 relocations are propagated to the linker output when creating
4692 position-independent output. LO16 and HI16 relocations are not
4693 supposed to be encountered in this case.
4694
4695 LABEL16 should always be resolvable by the linker, since it's only
4696 used by branches.
4697
4698 LABEL24, on the other hand, is used by calls. If it turns out that
4699 the target of a call is a dynamic symbol, a PLT entry must be
4700 created for it, which triggers the creation of a private function
4701 descriptor and, unless lazy binding is disabled, a lazy PLT entry.
4702
4703 GPREL relocations require the referenced symbol to be in the same
4704 segment as _gp, but this can only be checked later.
4705
4706 All GOT, GOTOFF and FUNCDESC relocations require a .got section to
4707 exist. LABEL24 might as well, since it may require a PLT entry,
4708 that will require a got.
4709
4710 Non-FUNCDESC GOT relocations require a GOT entry to be created
4711 regardless of whether the symbol is dynamic. However, since a
4712 global symbol that turns out to not be exported may have the same
4713 address of a non-dynamic symbol, we don't assign GOT entries at
4714 this point, such that we can share them in this case. A relocation
4715 for the GOT entry always has to be created, be it to offset a
4716 private symbol by the section load address, be it to get the symbol
4717 resolved dynamically.
4718
4719 FUNCDESC GOT relocations require a GOT entry to be created, and
4720 handled as if a FUNCDESC relocation was applied to the GOT entry in
4721 an object file.
4722
4723 FUNCDESC relocations referencing a symbol that turns out to NOT be
4724 dynamic cause a private function descriptor to be created. The
4725 FUNCDESC relocation then decays to a 32 relocation that points at
4726 the private descriptor. If the symbol is dynamic, the FUNCDESC
4727 relocation is propagated to the linker output, such that the
4728 dynamic linker creates the canonical descriptor, pointing to the
4729 dynamically-resolved definition of the function.
4730
4731 Non-FUNCDESC GOTOFF relocations must always refer to non-dynamic
4732 symbols that are assigned to the same segment as the GOT, but we
4733 can only check this later, after we know the complete set of
4734 symbols defined and/or exported.
4735
4736 FUNCDESC GOTOFF relocations require a function descriptor to be
4737 created and, unless lazy binding is disabled or the symbol is not
4738 dynamic, a lazy PLT entry. Since we can't tell at this point
4739 whether a symbol is going to be dynamic, we have to decide later
4740 whether to create a lazy PLT entry or bind the descriptor directly
4741 to the private function.
4742
4743 FUNCDESC_VALUE relocations are not supposed to be present in object
4744 files, but they may very well be simply propagated to the linker
4745 output, since they have no side effect.
4746
4747
4748 A function descriptor always requires a FUNCDESC_VALUE relocation.
4749 Whether it's in .plt.rel or not depends on whether lazy binding is
4750 enabled and on whether the referenced symbol is dynamic.
4751
4752 The existence of a lazy PLT requires the resolverStub lazy PLT
4753 entry to be present.
4754
4755
4756 As for assignment of GOT, PLT and lazy PLT entries, and private
4757 descriptors, we might do them all sequentially, but we can do
4758 better than that. For example, we can place GOT entries and
4759 private function descriptors referenced using 12-bit operands
4760 closer to the PIC register value, such that these relocations don't
4761 overflow. Those that are only referenced with LO16 relocations
4762 could come next, but we may as well place PLT-required function
4763 descriptors in the 12-bit range to make them shorter. Symbols
4764 referenced with LO16/HI16 may come next, but we may place
4765 additional function descriptors in the 16-bit range if we can
4766 reliably tell that we've already placed entries that are ever
4767 referenced with only LO16. PLT entries are therefore generated as
4768 small as possible, while not introducing relocation overflows in
4769 GOT or FUNCDESC_GOTOFF relocations. Lazy PLT entries could be
4770 generated before or after PLT entries, but not intermingled with
4771 them, such that we can have more lazy PLT entries in range for a
4772 branch to the resolverStub. The resolverStub should be emitted at
4773 the most distant location from the first lazy PLT entry such that
4774 it's still in range for a branch, or closer, if there isn't a need
4775 for so many lazy PLT entries. Additional lazy PLT entries may be
4776 emitted after the resolverStub, as long as branches are still in
4777 range. If the branch goes out of range, longer lazy PLT entries
4778 are emitted.
4779
4780 We could further optimize PLT and lazy PLT entries by giving them
4781 priority in assignment to closer-to-gr17 locations depending on the
4782 number of occurrences of references to them (assuming a function
4783 that's called more often is more important for performance, so its
4784 PLT entry should be faster), or taking hints from the compiler.
4785 Given infinite time and money... :-) */
4786
4787 static bfd_boolean
4788 bfinfdpic_check_relocs (bfd *abfd, struct bfd_link_info *info,
4789 asection *sec, const Elf_Internal_Rela *relocs)
4790 {
4791 Elf_Internal_Shdr *symtab_hdr;
4792 struct elf_link_hash_entry **sym_hashes;
4793 const Elf_Internal_Rela *rel;
4794 const Elf_Internal_Rela *rel_end;
4795 bfd *dynobj;
4796 struct bfinfdpic_relocs_info *picrel;
4797
4798 if (info->relocatable)
4799 return TRUE;
4800
4801 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4802 sym_hashes = elf_sym_hashes (abfd);
4803
4804 dynobj = elf_hash_table (info)->dynobj;
4805 rel_end = relocs + sec->reloc_count;
4806 for (rel = relocs; rel < rel_end; rel++)
4807 {
4808 struct elf_link_hash_entry *h;
4809 unsigned long r_symndx;
4810
4811 r_symndx = ELF32_R_SYM (rel->r_info);
4812 if (r_symndx < symtab_hdr->sh_info)
4813 h = NULL;
4814 else
4815 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4816
4817 switch (ELF32_R_TYPE (rel->r_info))
4818 {
4819 case R_BFIN_GOT17M4:
4820 case R_BFIN_GOTHI:
4821 case R_BFIN_GOTLO:
4822 case R_BFIN_FUNCDESC_GOT17M4:
4823 case R_BFIN_FUNCDESC_GOTHI:
4824 case R_BFIN_FUNCDESC_GOTLO:
4825 case R_BFIN_GOTOFF17M4:
4826 case R_BFIN_GOTOFFHI:
4827 case R_BFIN_GOTOFFLO:
4828 case R_BFIN_FUNCDESC_GOTOFF17M4:
4829 case R_BFIN_FUNCDESC_GOTOFFHI:
4830 case R_BFIN_FUNCDESC_GOTOFFLO:
4831 case R_BFIN_FUNCDESC:
4832 case R_BFIN_FUNCDESC_VALUE:
4833 if (! IS_FDPIC (abfd))
4834 goto bad_reloc;
4835 /* Fall through. */
4836 case R_BFIN_PCREL24:
4837 case R_BFIN_PCREL24_JUMP_L:
4838 case R_BFIN_BYTE4_DATA:
4839 if (IS_FDPIC (abfd) && ! dynobj)
4840 {
4841 elf_hash_table (info)->dynobj = dynobj = abfd;
4842 if (! _bfin_create_got_section (abfd, info))
4843 return FALSE;
4844 }
4845 if (! IS_FDPIC (abfd))
4846 {
4847 picrel = NULL;
4848 break;
4849 }
4850 if (h != NULL)
4851 {
4852 if (h->dynindx == -1)
4853 switch (ELF_ST_VISIBILITY (h->other))
4854 {
4855 case STV_INTERNAL:
4856 case STV_HIDDEN:
4857 break;
4858 default:
4859 bfd_elf_link_record_dynamic_symbol (info, h);
4860 break;
4861 }
4862 picrel
4863 = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info),
4864 abfd, h,
4865 rel->r_addend, INSERT);
4866 }
4867 else
4868 picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
4869 (info), abfd, r_symndx,
4870 rel->r_addend, INSERT);
4871 if (! picrel)
4872 return FALSE;
4873 break;
4874
4875 default:
4876 picrel = NULL;
4877 break;
4878 }
4879
4880 switch (ELF32_R_TYPE (rel->r_info))
4881 {
4882 case R_BFIN_PCREL24:
4883 case R_BFIN_PCREL24_JUMP_L:
4884 if (IS_FDPIC (abfd))
4885 picrel->call++;
4886 break;
4887
4888 case R_BFIN_FUNCDESC_VALUE:
4889 picrel->relocsfdv++;
4890 if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
4891 picrel->relocs32--;
4892 /* Fall through. */
4893
4894 case R_BFIN_BYTE4_DATA:
4895 if (! IS_FDPIC (abfd))
4896 break;
4897
4898 picrel->sym++;
4899 if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
4900 picrel->relocs32++;
4901 break;
4902
4903 case R_BFIN_GOT17M4:
4904 picrel->got17m4++;
4905 break;
4906
4907 case R_BFIN_GOTHI:
4908 case R_BFIN_GOTLO:
4909 picrel->gothilo++;
4910 break;
4911
4912 case R_BFIN_FUNCDESC_GOT17M4:
4913 picrel->fdgot17m4++;
4914 break;
4915
4916 case R_BFIN_FUNCDESC_GOTHI:
4917 case R_BFIN_FUNCDESC_GOTLO:
4918 picrel->fdgothilo++;
4919 break;
4920
4921 case R_BFIN_GOTOFF17M4:
4922 case R_BFIN_GOTOFFHI:
4923 case R_BFIN_GOTOFFLO:
4924 picrel->gotoff++;
4925 break;
4926
4927 case R_BFIN_FUNCDESC_GOTOFF17M4:
4928 picrel->fdgoff17m4++;
4929 break;
4930
4931 case R_BFIN_FUNCDESC_GOTOFFHI:
4932 case R_BFIN_FUNCDESC_GOTOFFLO:
4933 picrel->fdgoffhilo++;
4934 break;
4935
4936 case R_BFIN_FUNCDESC:
4937 picrel->fd++;
4938 picrel->relocsfd++;
4939 break;
4940
4941 /* This relocation describes the C++ object vtable hierarchy.
4942 Reconstruct it for later use during GC. */
4943 case R_BFIN_GNU_VTINHERIT:
4944 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4945 return FALSE;
4946 break;
4947
4948 /* This relocation describes which C++ vtable entries are actually
4949 used. Record for later use during GC. */
4950 case R_BFIN_GNU_VTENTRY:
4951 BFD_ASSERT (h != NULL);
4952 if (h != NULL
4953 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4954 return FALSE;
4955 break;
4956
4957 case R_BFIN_HUIMM16:
4958 case R_BFIN_LUIMM16:
4959 case R_BFIN_PCREL12_JUMP_S:
4960 case R_BFIN_PCREL10:
4961 break;
4962
4963 default:
4964 bad_reloc:
4965 (*_bfd_error_handler)
4966 (_("%B: unsupported relocation type %i"),
4967 abfd, ELF32_R_TYPE (rel->r_info));
4968 return FALSE;
4969 }
4970 }
4971
4972 return TRUE;
4973 }
4974
4975 /* Set the right machine number for a Blackfin ELF file. */
4976
4977 static bfd_boolean
4978 elf32_bfin_object_p (bfd *abfd)
4979 {
4980 bfd_default_set_arch_mach (abfd, bfd_arch_bfin, 0);
4981 return (((elf_elfheader (abfd)->e_flags & EF_BFIN_FDPIC) != 0)
4982 == (IS_FDPIC (abfd)));
4983 }
4984
4985 static bfd_boolean
4986 elf32_bfin_set_private_flags (bfd * abfd, flagword flags)
4987 {
4988 elf_elfheader (abfd)->e_flags = flags;
4989 elf_flags_init (abfd) = TRUE;
4990 return TRUE;
4991 }
4992
4993 /* Copy backend specific data from one object module to another. */
4994
4995 static bfd_boolean
4996 bfin_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
4997 {
4998 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4999 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5000 return TRUE;
5001
5002 BFD_ASSERT (!elf_flags_init (obfd)
5003 || elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags);
5004
5005 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
5006 elf_flags_init (obfd) = TRUE;
5007
5008 /* Copy object attributes. */
5009 _bfd_elf_copy_obj_attributes (ibfd, obfd);
5010
5011 return TRUE;
5012 }
5013
5014 static bfd_boolean
5015 elf32_bfinfdpic_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
5016 {
5017 unsigned i;
5018
5019 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
5020 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
5021 return TRUE;
5022
5023 if (! bfin_elf_copy_private_bfd_data (ibfd, obfd))
5024 return FALSE;
5025
5026 if (! elf_tdata (ibfd) || ! elf_tdata (ibfd)->phdr
5027 || ! elf_tdata (obfd) || ! elf_tdata (obfd)->phdr)
5028 return TRUE;
5029
5030 /* Copy the stack size. */
5031 for (i = 0; i < elf_elfheader (ibfd)->e_phnum; i++)
5032 if (elf_tdata (ibfd)->phdr[i].p_type == PT_GNU_STACK)
5033 {
5034 Elf_Internal_Phdr *iphdr = &elf_tdata (ibfd)->phdr[i];
5035
5036 for (i = 0; i < elf_elfheader (obfd)->e_phnum; i++)
5037 if (elf_tdata (obfd)->phdr[i].p_type == PT_GNU_STACK)
5038 {
5039 memcpy (&elf_tdata (obfd)->phdr[i], iphdr, sizeof (*iphdr));
5040
5041 /* Rewrite the phdrs, since we're only called after they
5042 were first written. */
5043 if (bfd_seek (obfd, (bfd_signed_vma) get_elf_backend_data (obfd)
5044 ->s->sizeof_ehdr, SEEK_SET) != 0
5045 || get_elf_backend_data (obfd)->s
5046 ->write_out_phdrs (obfd, elf_tdata (obfd)->phdr,
5047 elf_elfheader (obfd)->e_phnum) != 0)
5048 return FALSE;
5049 break;
5050 }
5051
5052 break;
5053 }
5054
5055 return TRUE;
5056 }
5057
5058
5059 /* Display the flags field. */
5060 static bfd_boolean
5061 elf32_bfin_print_private_bfd_data (bfd * abfd, PTR ptr)
5062 {
5063 FILE *file = (FILE *) ptr;
5064 flagword flags;
5065
5066 BFD_ASSERT (abfd != NULL && ptr != NULL);
5067
5068 /* Print normal ELF private data. */
5069 _bfd_elf_print_private_bfd_data (abfd, ptr);
5070
5071 flags = elf_elfheader (abfd)->e_flags;
5072
5073 /* xgettext:c-format */
5074 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
5075
5076 if (flags & EF_BFIN_PIC)
5077 fprintf (file, " -fpic");
5078
5079 if (flags & EF_BFIN_FDPIC)
5080 fprintf (file, " -mfdpic");
5081
5082 fputc ('\n', file);
5083
5084 return TRUE;
5085 }
5086
5087 /* Merge backend specific data from an object file to the output
5088 object file when linking. */
5089
5090 static bfd_boolean
5091 elf32_bfin_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
5092 {
5093 flagword old_flags, new_flags;
5094 bfd_boolean error = FALSE;
5095
5096 new_flags = elf_elfheader (ibfd)->e_flags;
5097 old_flags = elf_elfheader (obfd)->e_flags;
5098
5099 if (new_flags & EF_BFIN_FDPIC)
5100 new_flags &= ~EF_BFIN_PIC;
5101
5102 #ifdef DEBUG
5103 (*_bfd_error_handler) ("old_flags = 0x%.8lx, new_flags = 0x%.8lx, init = %s, filename = %s",
5104 old_flags, new_flags, elf_flags_init (obfd) ? "yes" : "no",
5105 bfd_get_filename (ibfd));
5106 #endif
5107
5108 if (!elf_flags_init (obfd)) /* First call, no flags set. */
5109 {
5110 elf_flags_init (obfd) = TRUE;
5111 elf_elfheader (obfd)->e_flags = new_flags;
5112 }
5113
5114 if (((new_flags & EF_BFIN_FDPIC) == 0) != (! IS_FDPIC (obfd)))
5115 {
5116 error = TRUE;
5117 if (IS_FDPIC (obfd))
5118 (*_bfd_error_handler)
5119 (_("%s: cannot link non-fdpic object file into fdpic executable"),
5120 bfd_get_filename (ibfd));
5121 else
5122 (*_bfd_error_handler)
5123 (_("%s: cannot link fdpic object file into non-fdpic executable"),
5124 bfd_get_filename (ibfd));
5125 }
5126
5127 if (error)
5128 bfd_set_error (bfd_error_bad_value);
5129
5130 return !error;
5131 }
5132 \f
5133 /* bfin ELF linker hash entry. */
5134
5135 struct bfin_link_hash_entry
5136 {
5137 struct elf_link_hash_entry root;
5138
5139 /* Number of PC relative relocs copied for this symbol. */
5140 struct bfin_pcrel_relocs_copied *pcrel_relocs_copied;
5141 };
5142
5143 /* bfin ELF linker hash table. */
5144
5145 struct bfin_link_hash_table
5146 {
5147 struct elf_link_hash_table root;
5148
5149 /* Small local sym cache. */
5150 struct sym_cache sym_cache;
5151 };
5152
5153 #define bfin_hash_entry(ent) ((struct bfin_link_hash_entry *) (ent))
5154
5155 static struct bfd_hash_entry *
5156 bfin_link_hash_newfunc (struct bfd_hash_entry *entry,
5157 struct bfd_hash_table *table, const char *string)
5158 {
5159 struct bfd_hash_entry *ret = entry;
5160
5161 /* Allocate the structure if it has not already been allocated by a
5162 subclass. */
5163 if (ret == NULL)
5164 ret = bfd_hash_allocate (table, sizeof (struct bfin_link_hash_entry));
5165 if (ret == NULL)
5166 return ret;
5167
5168 /* Call the allocation method of the superclass. */
5169 ret = _bfd_elf_link_hash_newfunc (ret, table, string);
5170 if (ret != NULL)
5171 bfin_hash_entry (ret)->pcrel_relocs_copied = NULL;
5172
5173 return ret;
5174 }
5175
5176 /* Create an bfin ELF linker hash table. */
5177
5178 static struct bfd_link_hash_table *
5179 bfin_link_hash_table_create (bfd * abfd)
5180 {
5181 struct bfin_link_hash_table *ret;
5182 bfd_size_type amt = sizeof (struct bfin_link_hash_table);
5183
5184 ret = bfd_zalloc (abfd, amt);
5185 if (ret == NULL)
5186 return NULL;
5187
5188 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
5189 bfin_link_hash_newfunc,
5190 sizeof (struct elf_link_hash_entry)))
5191 {
5192 free (ret);
5193 return NULL;
5194 }
5195
5196 ret->sym_cache.abfd = NULL;
5197
5198 return &ret->root.root;
5199 }
5200
5201 /* The size in bytes of an entry in the procedure linkage table. */
5202
5203 /* Finish up the dynamic sections. */
5204
5205 static bfd_boolean
5206 bfin_finish_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
5207 struct bfd_link_info *info)
5208 {
5209 bfd *dynobj;
5210 asection *sdyn;
5211
5212 dynobj = elf_hash_table (info)->dynobj;
5213
5214 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
5215
5216 if (elf_hash_table (info)->dynamic_sections_created)
5217 {
5218 Elf32_External_Dyn *dyncon, *dynconend;
5219
5220 BFD_ASSERT (sdyn != NULL);
5221
5222 dyncon = (Elf32_External_Dyn *) sdyn->contents;
5223 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
5224 for (; dyncon < dynconend; dyncon++)
5225 {
5226 Elf_Internal_Dyn dyn;
5227
5228 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
5229
5230 }
5231
5232 }
5233 return TRUE;
5234 }
5235
5236 /* Finish up dynamic symbol handling. We set the contents of various
5237 dynamic sections here. */
5238
5239 static bfd_boolean
5240 bfin_finish_dynamic_symbol (bfd * output_bfd,
5241 struct bfd_link_info *info,
5242 struct elf_link_hash_entry *h,
5243 Elf_Internal_Sym * sym)
5244 {
5245 bfd *dynobj;
5246
5247 dynobj = elf_hash_table (info)->dynobj;
5248
5249 if (h->got.offset != (bfd_vma) - 1)
5250 {
5251 asection *sgot;
5252 asection *srela;
5253 Elf_Internal_Rela rela;
5254 bfd_byte *loc;
5255
5256 /* This symbol has an entry in the global offset table.
5257 Set it up. */
5258
5259 sgot = bfd_get_section_by_name (dynobj, ".got");
5260 srela = bfd_get_section_by_name (dynobj, ".rela.got");
5261 BFD_ASSERT (sgot != NULL && srela != NULL);
5262
5263 rela.r_offset = (sgot->output_section->vma
5264 + sgot->output_offset
5265 + (h->got.offset & ~(bfd_vma) 1));
5266
5267 /* If this is a -Bsymbolic link, and the symbol is defined
5268 locally, we just want to emit a RELATIVE reloc. Likewise if
5269 the symbol was forced to be local because of a version file.
5270 The entry in the global offset table will already have been
5271 initialized in the relocate_section function. */
5272 if (info->shared
5273 && (info->symbolic
5274 || h->dynindx == -1 || h->forced_local) && h->def_regular)
5275 {
5276 fprintf(stderr, "*** check this relocation %s\n", __FUNCTION__);
5277 rela.r_info = ELF32_R_INFO (0, R_BFIN_PCREL24);
5278 rela.r_addend = bfd_get_signed_32 (output_bfd,
5279 (sgot->contents
5280 +
5281 (h->got.
5282 offset & ~(bfd_vma) 1)));
5283 }
5284 else
5285 {
5286 bfd_put_32 (output_bfd, (bfd_vma) 0,
5287 sgot->contents + (h->got.offset & ~(bfd_vma) 1));
5288 rela.r_info = ELF32_R_INFO (h->dynindx, R_BFIN_GOT);
5289 rela.r_addend = 0;
5290 }
5291
5292 loc = srela->contents;
5293 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
5294 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
5295 }
5296
5297 if (h->needs_copy)
5298 {
5299 BFD_ASSERT (0);
5300 }
5301 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
5302 if (strcmp (h->root.root.string, "__DYNAMIC") == 0
5303 || h == elf_hash_table (info)->hgot)
5304 sym->st_shndx = SHN_ABS;
5305
5306 return TRUE;
5307 }
5308
5309 /* Adjust a symbol defined by a dynamic object and referenced by a
5310 regular object. The current definition is in some section of the
5311 dynamic object, but we're not including those sections. We have to
5312 change the definition to something the rest of the link can
5313 understand. */
5314
5315 static bfd_boolean
5316 bfin_adjust_dynamic_symbol (struct bfd_link_info *info,
5317 struct elf_link_hash_entry *h)
5318 {
5319 bfd *dynobj;
5320 asection *s;
5321 unsigned int power_of_two;
5322
5323 dynobj = elf_hash_table (info)->dynobj;
5324
5325 /* Make sure we know what is going on here. */
5326 BFD_ASSERT (dynobj != NULL
5327 && (h->needs_plt
5328 || h->u.weakdef != NULL
5329 || (h->def_dynamic && h->ref_regular && !h->def_regular)));
5330
5331 /* If this is a function, put it in the procedure linkage table. We
5332 will fill in the contents of the procedure linkage table later,
5333 when we know the address of the .got section. */
5334 if (h->type == STT_FUNC || h->needs_plt)
5335 {
5336 BFD_ASSERT(0);
5337 }
5338
5339 /* If this is a weak symbol, and there is a real definition, the
5340 processor independent code will have arranged for us to see the
5341 real definition first, and we can just use the same value. */
5342 if (h->u.weakdef != NULL)
5343 {
5344 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5345 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5346 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5347 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5348 return TRUE;
5349 }
5350
5351 /* This is a reference to a symbol defined by a dynamic object which
5352 is not a function. */
5353
5354 /* If we are creating a shared library, we must presume that the
5355 only references to the symbol are via the global offset table.
5356 For such cases we need not do anything here; the relocations will
5357 be handled correctly by relocate_section. */
5358 if (info->shared)
5359 return TRUE;
5360
5361 /* We must allocate the symbol in our .dynbss section, which will
5362 become part of the .bss section of the executable. There will be
5363 an entry for this symbol in the .dynsym section. The dynamic
5364 object will contain position independent code, so all references
5365 from the dynamic object to this symbol will go through the global
5366 offset table. The dynamic linker will use the .dynsym entry to
5367 determine the address it must put in the global offset table, so
5368 both the dynamic object and the regular object will refer to the
5369 same memory location for the variable. */
5370
5371 s = bfd_get_section_by_name (dynobj, ".dynbss");
5372 BFD_ASSERT (s != NULL);
5373
5374 /* We must generate a R_68K_COPY reloc to tell the dynamic linker to
5375 copy the initial value out of the dynamic object and into the
5376 runtime process image. We need to remember the offset into the
5377 .rela.bss section we are going to use. */
5378 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5379 {
5380 asection *srel;
5381
5382 srel = bfd_get_section_by_name (dynobj, ".rela.bss");
5383 BFD_ASSERT (srel != NULL);
5384 srel->size += sizeof (Elf32_External_Rela);
5385 h->needs_copy = 1;
5386 }
5387
5388 /* We need to figure out the alignment required for this symbol. I
5389 have no idea how ELF linkers handle this. */
5390 power_of_two = bfd_log2 (h->size);
5391 if (power_of_two > 3)
5392 power_of_two = 3;
5393
5394 /* Apply the required alignment. */
5395 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
5396 if (power_of_two > bfd_get_section_alignment (dynobj, s))
5397 {
5398 if (!bfd_set_section_alignment (dynobj, s, power_of_two))
5399 return FALSE;
5400 }
5401
5402 /* Define the symbol as being at this point in the section. */
5403 h->root.u.def.section = s;
5404 h->root.u.def.value = s->size;
5405
5406 /* Increment the section size to make room for the symbol. */
5407 s->size += h->size;
5408
5409 return TRUE;
5410 }
5411
5412 /* The bfin linker needs to keep track of the number of relocs that it
5413 decides to copy in check_relocs for each symbol. This is so that it
5414 can discard PC relative relocs if it doesn't need them when linking
5415 with -Bsymbolic. We store the information in a field extending the
5416 regular ELF linker hash table. */
5417
5418 /* This structure keeps track of the number of PC relative relocs we have
5419 copied for a given symbol. */
5420
5421 struct bfin_pcrel_relocs_copied
5422 {
5423 /* Next section. */
5424 struct bfin_pcrel_relocs_copied *next;
5425 /* A section in dynobj. */
5426 asection *section;
5427 /* Number of relocs copied in this section. */
5428 bfd_size_type count;
5429 };
5430
5431 /* This function is called via elf_link_hash_traverse if we are
5432 creating a shared object. In the -Bsymbolic case it discards the
5433 space allocated to copy PC relative relocs against symbols which
5434 are defined in regular objects. For the normal shared case, it
5435 discards space for pc-relative relocs that have become local due to
5436 symbol visibility changes. We allocated space for them in the
5437 check_relocs routine, but we won't fill them in in the
5438 relocate_section routine.
5439
5440 We also check whether any of the remaining relocations apply
5441 against a readonly section, and set the DF_TEXTREL flag in this
5442 case. */
5443
5444 static bfd_boolean
5445 bfin_discard_copies (struct elf_link_hash_entry *h, PTR inf)
5446 {
5447 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5448 struct bfin_pcrel_relocs_copied *s;
5449
5450 if (h->root.type == bfd_link_hash_warning)
5451 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5452
5453 if (!h->def_regular || (!info->symbolic && !h->forced_local))
5454 {
5455 if ((info->flags & DF_TEXTREL) == 0)
5456 {
5457 /* Look for relocations against read-only sections. */
5458 for (s = bfin_hash_entry (h)->pcrel_relocs_copied;
5459 s != NULL; s = s->next)
5460 if ((s->section->flags & SEC_READONLY) != 0)
5461 {
5462 info->flags |= DF_TEXTREL;
5463 break;
5464 }
5465 }
5466
5467 return TRUE;
5468 }
5469
5470 for (s = bfin_hash_entry (h)->pcrel_relocs_copied;
5471 s != NULL; s = s->next)
5472 s->section->size -= s->count * sizeof (Elf32_External_Rela);
5473
5474 return TRUE;
5475 }
5476
5477 static bfd_boolean
5478 bfin_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
5479 struct bfd_link_info *info)
5480 {
5481 bfd *dynobj;
5482 asection *s;
5483 bfd_boolean relocs;
5484
5485 dynobj = elf_hash_table (info)->dynobj;
5486 BFD_ASSERT (dynobj != NULL);
5487
5488 if (elf_hash_table (info)->dynamic_sections_created)
5489 {
5490 /* Set the contents of the .interp section to the interpreter. */
5491 if (info->executable)
5492 {
5493 s = bfd_get_section_by_name (dynobj, ".interp");
5494 BFD_ASSERT (s != NULL);
5495 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
5496 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5497 }
5498 }
5499 else
5500 {
5501 /* We may have created entries in the .rela.got section.
5502 However, if we are not creating the dynamic sections, we will
5503 not actually use these entries. Reset the size of .rela.got,
5504 which will cause it to get stripped from the output file
5505 below. */
5506 s = bfd_get_section_by_name (dynobj, ".rela.got");
5507 if (s != NULL)
5508 s->size = 0;
5509 }
5510
5511 /* If this is a -Bsymbolic shared link, then we need to discard all
5512 PC relative relocs against symbols defined in a regular object.
5513 For the normal shared case we discard the PC relative relocs
5514 against symbols that have become local due to visibility changes.
5515 We allocated space for them in the check_relocs routine, but we
5516 will not fill them in in the relocate_section routine. */
5517 if (info->shared)
5518 elf_link_hash_traverse (elf_hash_table (info),
5519 bfin_discard_copies, (PTR) info);
5520
5521 /* The check_relocs and adjust_dynamic_symbol entry points have
5522 determined the sizes of the various dynamic sections. Allocate
5523 memory for them. */
5524 relocs = FALSE;
5525 for (s = dynobj->sections; s != NULL; s = s->next)
5526 {
5527 const char *name;
5528 bfd_boolean strip;
5529
5530 if ((s->flags & SEC_LINKER_CREATED) == 0)
5531 continue;
5532
5533 /* It's OK to base decisions on the section name, because none
5534 of the dynobj section names depend upon the input files. */
5535 name = bfd_get_section_name (dynobj, s);
5536
5537 strip = FALSE;
5538
5539 if (CONST_STRNEQ (name, ".rela"))
5540 {
5541 if (s->size == 0)
5542 {
5543 /* If we don't need this section, strip it from the
5544 output file. This is mostly to handle .rela.bss and
5545 .rela.plt. We must create both sections in
5546 create_dynamic_sections, because they must be created
5547 before the linker maps input sections to output
5548 sections. The linker does that before
5549 adjust_dynamic_symbol is called, and it is that
5550 function which decides whether anything needs to go
5551 into these sections. */
5552 strip = TRUE;
5553 }
5554 else
5555 {
5556 relocs = TRUE;
5557
5558 /* We use the reloc_count field as a counter if we need
5559 to copy relocs into the output file. */
5560 s->reloc_count = 0;
5561 }
5562 }
5563 else if (! CONST_STRNEQ (name, ".got"))
5564 {
5565 /* It's not one of our sections, so don't allocate space. */
5566 continue;
5567 }
5568
5569 if (strip)
5570 {
5571 s->flags |= SEC_EXCLUDE;
5572 continue;
5573 }
5574
5575 /* Allocate memory for the section contents. */
5576 /* FIXME: This should be a call to bfd_alloc not bfd_zalloc.
5577 Unused entries should be reclaimed before the section's contents
5578 are written out, but at the moment this does not happen. Thus in
5579 order to prevent writing out garbage, we initialise the section's
5580 contents to zero. */
5581 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
5582 if (s->contents == NULL && s->size != 0)
5583 return FALSE;
5584 }
5585
5586 if (elf_hash_table (info)->dynamic_sections_created)
5587 {
5588 /* Add some entries to the .dynamic section. We fill in the
5589 values later, in bfin_finish_dynamic_sections, but we
5590 must add the entries now so that we get the correct size for
5591 the .dynamic section. The DT_DEBUG entry is filled in by the
5592 dynamic linker and used by the debugger. */
5593 #define add_dynamic_entry(TAG, VAL) \
5594 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5595
5596 if (!info->shared)
5597 {
5598 if (!add_dynamic_entry (DT_DEBUG, 0))
5599 return FALSE;
5600 }
5601
5602
5603 if (relocs)
5604 {
5605 if (!add_dynamic_entry (DT_RELA, 0)
5606 || !add_dynamic_entry (DT_RELASZ, 0)
5607 || !add_dynamic_entry (DT_RELAENT,
5608 sizeof (Elf32_External_Rela)))
5609 return FALSE;
5610 }
5611
5612 if ((info->flags & DF_TEXTREL) != 0)
5613 {
5614 if (!add_dynamic_entry (DT_TEXTREL, 0))
5615 return FALSE;
5616 }
5617 }
5618 #undef add_dynamic_entry
5619
5620 return TRUE;
5621 }
5622 \f
5623 /* Given a .data section and a .emreloc in-memory section, store
5624 relocation information into the .emreloc section which can be
5625 used at runtime to relocate the section. This is called by the
5626 linker when the --embedded-relocs switch is used. This is called
5627 after the add_symbols entry point has been called for all the
5628 objects, and before the final_link entry point is called. */
5629
5630 bfd_boolean bfd_bfin_elf32_create_embedded_relocs
5631 PARAMS ((bfd *, struct bfd_link_info *, asection *, asection *, char **));
5632
5633 bfd_boolean
5634 bfd_bfin_elf32_create_embedded_relocs (
5635 bfd *abfd,
5636 struct bfd_link_info *info,
5637 asection *datasec,
5638 asection *relsec,
5639 char **errmsg)
5640 {
5641 Elf_Internal_Shdr *symtab_hdr;
5642 Elf_Internal_Sym *isymbuf = NULL;
5643 Elf_Internal_Rela *internal_relocs = NULL;
5644 Elf_Internal_Rela *irel, *irelend;
5645 bfd_byte *p;
5646 bfd_size_type amt;
5647
5648 BFD_ASSERT (! info->relocatable);
5649
5650 *errmsg = NULL;
5651
5652 if (datasec->reloc_count == 0)
5653 return TRUE;
5654
5655 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5656
5657 /* Get a copy of the native relocations. */
5658 internal_relocs = (_bfd_elf_link_read_relocs
5659 (abfd, datasec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
5660 info->keep_memory));
5661 if (internal_relocs == NULL)
5662 goto error_return;
5663
5664 amt = (bfd_size_type) datasec->reloc_count * 12;
5665 relsec->contents = (bfd_byte *) bfd_alloc (abfd, amt);
5666 if (relsec->contents == NULL)
5667 goto error_return;
5668
5669 p = relsec->contents;
5670
5671 irelend = internal_relocs + datasec->reloc_count;
5672 for (irel = internal_relocs; irel < irelend; irel++, p += 12)
5673 {
5674 asection *targetsec;
5675
5676 /* We are going to write a four byte longword into the runtime
5677 reloc section. The longword will be the address in the data
5678 section which must be relocated. It is followed by the name
5679 of the target section NUL-padded or truncated to 8
5680 characters. */
5681
5682 /* We can only relocate absolute longword relocs at run time. */
5683 if (ELF32_R_TYPE (irel->r_info) != (int) R_BFIN_BYTE4_DATA)
5684 {
5685 *errmsg = _("unsupported reloc type");
5686 bfd_set_error (bfd_error_bad_value);
5687 goto error_return;
5688 }
5689
5690 /* Get the target section referred to by the reloc. */
5691 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
5692 {
5693 /* A local symbol. */
5694 Elf_Internal_Sym *isym;
5695
5696 /* Read this BFD's local symbols if we haven't done so already. */
5697 if (isymbuf == NULL)
5698 {
5699 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5700 if (isymbuf == NULL)
5701 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
5702 symtab_hdr->sh_info, 0,
5703 NULL, NULL, NULL);
5704 if (isymbuf == NULL)
5705 goto error_return;
5706 }
5707
5708 isym = isymbuf + ELF32_R_SYM (irel->r_info);
5709 targetsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
5710 }
5711 else
5712 {
5713 unsigned long indx;
5714 struct elf_link_hash_entry *h;
5715
5716 /* An external symbol. */
5717 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
5718 h = elf_sym_hashes (abfd)[indx];
5719 BFD_ASSERT (h != NULL);
5720 if (h->root.type == bfd_link_hash_defined
5721 || h->root.type == bfd_link_hash_defweak)
5722 targetsec = h->root.u.def.section;
5723 else
5724 targetsec = NULL;
5725 }
5726
5727 bfd_put_32 (abfd, irel->r_offset + datasec->output_offset, p);
5728 memset (p + 4, 0, 8);
5729 if (targetsec != NULL)
5730 strncpy ((char *) p + 4, targetsec->output_section->name, 8);
5731 }
5732
5733 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
5734 free (isymbuf);
5735 if (internal_relocs != NULL
5736 && elf_section_data (datasec)->relocs != internal_relocs)
5737 free (internal_relocs);
5738 return TRUE;
5739
5740 error_return:
5741 if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
5742 free (isymbuf);
5743 if (internal_relocs != NULL
5744 && elf_section_data (datasec)->relocs != internal_relocs)
5745 free (internal_relocs);
5746 return FALSE;
5747 }
5748
5749 struct bfd_elf_special_section const elf32_bfin_special_sections[] =
5750 {
5751 { ".l1.text", 8, -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
5752 { ".l1.data", 8, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
5753 { NULL, 0, 0, 0, 0 }
5754 };
5755
5756 \f
5757 #define TARGET_LITTLE_SYM bfd_elf32_bfin_vec
5758 #define TARGET_LITTLE_NAME "elf32-bfin"
5759 #define ELF_ARCH bfd_arch_bfin
5760 #define ELF_MACHINE_CODE EM_BLACKFIN
5761 #define ELF_MAXPAGESIZE 0x1000
5762 #define elf_symbol_leading_char '_'
5763
5764 #define bfd_elf32_bfd_reloc_type_lookup bfin_bfd_reloc_type_lookup
5765 #define bfd_elf32_bfd_reloc_name_lookup \
5766 bfin_bfd_reloc_name_lookup
5767 #define elf_info_to_howto bfin_info_to_howto
5768 #define elf_info_to_howto_rel 0
5769 #define elf_backend_object_p elf32_bfin_object_p
5770
5771 #define bfd_elf32_bfd_is_local_label_name \
5772 bfin_is_local_label_name
5773 #define bfin_hash_table(p) \
5774 ((struct bfin_link_hash_table *) (p)->hash)
5775
5776
5777
5778 #define elf_backend_create_dynamic_sections \
5779 _bfd_elf_create_dynamic_sections
5780 #define bfd_elf32_bfd_link_hash_table_create \
5781 bfin_link_hash_table_create
5782 #define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
5783
5784 #define elf_backend_check_relocs bfin_check_relocs
5785 #define elf_backend_adjust_dynamic_symbol \
5786 bfin_adjust_dynamic_symbol
5787 #define elf_backend_size_dynamic_sections \
5788 bfin_size_dynamic_sections
5789 #define elf_backend_relocate_section bfin_relocate_section
5790 #define elf_backend_finish_dynamic_symbol \
5791 bfin_finish_dynamic_symbol
5792 #define elf_backend_finish_dynamic_sections \
5793 bfin_finish_dynamic_sections
5794 #define elf_backend_gc_mark_hook bfin_gc_mark_hook
5795 #define elf_backend_gc_sweep_hook bfin_gc_sweep_hook
5796 #define bfd_elf32_bfd_merge_private_bfd_data \
5797 elf32_bfin_merge_private_bfd_data
5798 #define bfd_elf32_bfd_set_private_flags \
5799 elf32_bfin_set_private_flags
5800 #define bfd_elf32_bfd_print_private_bfd_data \
5801 elf32_bfin_print_private_bfd_data
5802 #define elf_backend_reloc_type_class elf32_bfin_reloc_type_class
5803 #define elf_backend_can_gc_sections 1
5804 #define elf_backend_special_sections elf32_bfin_special_sections
5805 #define elf_backend_can_refcount 1
5806 #define elf_backend_want_got_plt 0
5807 #define elf_backend_plt_readonly 1
5808 #define elf_backend_want_plt_sym 0
5809 #define elf_backend_got_header_size 12
5810 #define elf_backend_rela_normal 1
5811
5812 #include "elf32-target.h"
5813
5814 #undef TARGET_LITTLE_SYM
5815 #define TARGET_LITTLE_SYM bfd_elf32_bfinfdpic_vec
5816 #undef TARGET_LITTLE_NAME
5817 #define TARGET_LITTLE_NAME "elf32-bfinfdpic"
5818 #undef elf32_bed
5819 #define elf32_bed elf32_bfinfdpic_bed
5820
5821 #undef elf_backend_gc_sweep_hook
5822 #define elf_backend_gc_sweep_hook bfinfdpic_gc_sweep_hook
5823
5824 #undef elf_backend_got_header_size
5825 #define elf_backend_got_header_size 0
5826
5827 #undef elf_backend_relocate_section
5828 #define elf_backend_relocate_section bfinfdpic_relocate_section
5829 #undef elf_backend_check_relocs
5830 #define elf_backend_check_relocs bfinfdpic_check_relocs
5831
5832 #undef bfd_elf32_bfd_link_hash_table_create
5833 #define bfd_elf32_bfd_link_hash_table_create \
5834 bfinfdpic_elf_link_hash_table_create
5835 #undef elf_backend_always_size_sections
5836 #define elf_backend_always_size_sections \
5837 elf32_bfinfdpic_always_size_sections
5838 #undef elf_backend_modify_program_headers
5839 #define elf_backend_modify_program_headers \
5840 elf32_bfinfdpic_modify_program_headers
5841 #undef bfd_elf32_bfd_copy_private_bfd_data
5842 #define bfd_elf32_bfd_copy_private_bfd_data \
5843 elf32_bfinfdpic_copy_private_bfd_data
5844
5845 #undef elf_backend_create_dynamic_sections
5846 #define elf_backend_create_dynamic_sections \
5847 elf32_bfinfdpic_create_dynamic_sections
5848 #undef elf_backend_adjust_dynamic_symbol
5849 #define elf_backend_adjust_dynamic_symbol \
5850 elf32_bfinfdpic_adjust_dynamic_symbol
5851 #undef elf_backend_size_dynamic_sections
5852 #define elf_backend_size_dynamic_sections \
5853 elf32_bfinfdpic_size_dynamic_sections
5854 #undef elf_backend_finish_dynamic_symbol
5855 #define elf_backend_finish_dynamic_symbol \
5856 elf32_bfinfdpic_finish_dynamic_symbol
5857 #undef elf_backend_finish_dynamic_sections
5858 #define elf_backend_finish_dynamic_sections \
5859 elf32_bfinfdpic_finish_dynamic_sections
5860
5861 #undef elf_backend_discard_info
5862 #define elf_backend_discard_info \
5863 bfinfdpic_elf_discard_info
5864 #undef elf_backend_can_make_relative_eh_frame
5865 #define elf_backend_can_make_relative_eh_frame \
5866 bfinfdpic_elf_use_relative_eh_frame
5867 #undef elf_backend_can_make_lsda_relative_eh_frame
5868 #define elf_backend_can_make_lsda_relative_eh_frame \
5869 bfinfdpic_elf_use_relative_eh_frame
5870 #undef elf_backend_encode_eh_address
5871 #define elf_backend_encode_eh_address \
5872 bfinfdpic_elf_encode_eh_address
5873
5874 #undef elf_backend_may_use_rel_p
5875 #define elf_backend_may_use_rel_p 1
5876 #undef elf_backend_may_use_rela_p
5877 #define elf_backend_may_use_rela_p 1
5878 /* We use REL for dynamic relocations only. */
5879 #undef elf_backend_default_use_rela_p
5880 #define elf_backend_default_use_rela_p 1
5881
5882 #undef elf_backend_omit_section_dynsym
5883 #define elf_backend_omit_section_dynsym _bfinfdpic_link_omit_section_dynsym
5884
5885 #include "elf32-target.h"
git-cvsimport of binutils cvsroot