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* m68klinux-nat.c: Include "gdb_proc_service.h".
[deliverable/binutils-gdb.git] / bfd / elf32-crx.c
1 /* BFD back-end for National Semiconductor's CRX ELF
2 Copyright 2004, 2005, 2006, 2007, 2009, 2010
3 Free Software Foundation, Inc.
4 Written by Tomer Levi, NSC, Israel.
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 MA 02110-1301, USA. */
22
23 #include "sysdep.h"
24 #include "bfd.h"
25 #include "bfdlink.h"
26 #include "libbfd.h"
27 #include "elf-bfd.h"
28 #include "elf/crx.h"
29
30 static reloc_howto_type *elf_crx_reloc_type_lookup
31 (bfd *, bfd_reloc_code_real_type);
32 static void elf_crx_info_to_howto
33 (bfd *, arelent *, Elf_Internal_Rela *);
34 static bfd_boolean elf32_crx_relax_delete_bytes
35 (struct bfd_link_info *, bfd *, asection *, bfd_vma, int);
36 static bfd_reloc_status_type crx_elf_final_link_relocate
37 (reloc_howto_type *, bfd *, bfd *, asection *,
38 bfd_byte *, bfd_vma, bfd_vma, bfd_vma,
39 struct bfd_link_info *, asection *, int);
40 static bfd_boolean elf32_crx_relocate_section
41 (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
42 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **);
43 static bfd_boolean elf32_crx_relax_section
44 (bfd *, asection *, struct bfd_link_info *, bfd_boolean *);
45 static bfd_byte * elf32_crx_get_relocated_section_contents
46 (bfd *, struct bfd_link_info *, struct bfd_link_order *,
47 bfd_byte *, bfd_boolean, asymbol **);
48
49 /* crx_reloc_map array maps BFD relocation enum into a CRGAS relocation type. */
50
51 struct crx_reloc_map
52 {
53 bfd_reloc_code_real_type bfd_reloc_enum; /* BFD relocation enum. */
54 unsigned short crx_reloc_type; /* CRX relocation type. */
55 };
56
57 static const struct crx_reloc_map crx_reloc_map[R_CRX_MAX] =
58 {
59 {BFD_RELOC_NONE, R_CRX_NONE},
60 {BFD_RELOC_CRX_REL4, R_CRX_REL4},
61 {BFD_RELOC_CRX_REL8, R_CRX_REL8},
62 {BFD_RELOC_CRX_REL8_CMP, R_CRX_REL8_CMP},
63 {BFD_RELOC_CRX_REL16, R_CRX_REL16},
64 {BFD_RELOC_CRX_REL24, R_CRX_REL24},
65 {BFD_RELOC_CRX_REL32, R_CRX_REL32},
66 {BFD_RELOC_CRX_REGREL12, R_CRX_REGREL12},
67 {BFD_RELOC_CRX_REGREL22, R_CRX_REGREL22},
68 {BFD_RELOC_CRX_REGREL28, R_CRX_REGREL28},
69 {BFD_RELOC_CRX_REGREL32, R_CRX_REGREL32},
70 {BFD_RELOC_CRX_ABS16, R_CRX_ABS16},
71 {BFD_RELOC_CRX_ABS32, R_CRX_ABS32},
72 {BFD_RELOC_CRX_NUM8, R_CRX_NUM8},
73 {BFD_RELOC_CRX_NUM16, R_CRX_NUM16},
74 {BFD_RELOC_CRX_NUM32, R_CRX_NUM32},
75 {BFD_RELOC_CRX_IMM16, R_CRX_IMM16},
76 {BFD_RELOC_CRX_IMM32, R_CRX_IMM32},
77 {BFD_RELOC_CRX_SWITCH8, R_CRX_SWITCH8},
78 {BFD_RELOC_CRX_SWITCH16, R_CRX_SWITCH16},
79 {BFD_RELOC_CRX_SWITCH32, R_CRX_SWITCH32}
80 };
81
82 static reloc_howto_type crx_elf_howto_table[] =
83 {
84 HOWTO (R_CRX_NONE, /* type */
85 0, /* rightshift */
86 2, /* size */
87 32, /* bitsize */
88 FALSE, /* pc_relative */
89 0, /* bitpos */
90 complain_overflow_dont,/* complain_on_overflow */
91 bfd_elf_generic_reloc, /* special_function */
92 "R_CRX_NONE", /* name */
93 FALSE, /* partial_inplace */
94 0, /* src_mask */
95 0, /* dst_mask */
96 FALSE), /* pcrel_offset */
97
98 HOWTO (R_CRX_REL4, /* type */
99 1, /* rightshift */
100 0, /* size */
101 4, /* bitsize */
102 TRUE, /* pc_relative */
103 0, /* bitpos */
104 complain_overflow_bitfield,/* complain_on_overflow */
105 bfd_elf_generic_reloc, /* special_function */
106 "R_CRX_REL4", /* name */
107 FALSE, /* partial_inplace */
108 0x0, /* src_mask */
109 0xf, /* dst_mask */
110 FALSE), /* pcrel_offset */
111
112 HOWTO (R_CRX_REL8, /* type */
113 1, /* rightshift */
114 0, /* size */
115 8, /* bitsize */
116 TRUE, /* pc_relative */
117 0, /* bitpos */
118 complain_overflow_bitfield,/* complain_on_overflow */
119 bfd_elf_generic_reloc, /* special_function */
120 "R_CRX_REL8", /* name */
121 FALSE, /* partial_inplace */
122 0x0, /* src_mask */
123 0xff, /* dst_mask */
124 FALSE), /* pcrel_offset */
125
126 HOWTO (R_CRX_REL8_CMP, /* type */
127 1, /* rightshift */
128 0, /* size */
129 8, /* bitsize */
130 TRUE, /* pc_relative */
131 0, /* bitpos */
132 complain_overflow_bitfield,/* complain_on_overflow */
133 bfd_elf_generic_reloc, /* special_function */
134 "R_CRX_REL8_CMP", /* name */
135 FALSE, /* partial_inplace */
136 0x0, /* src_mask */
137 0xff, /* dst_mask */
138 FALSE), /* pcrel_offset */
139
140 HOWTO (R_CRX_REL16, /* type */
141 1, /* rightshift */
142 1, /* size */
143 16, /* bitsize */
144 TRUE, /* pc_relative */
145 0, /* bitpos */
146 complain_overflow_bitfield,/* complain_on_overflow */
147 bfd_elf_generic_reloc, /* special_function */
148 "R_CRX_REL16", /* name */
149 FALSE, /* partial_inplace */
150 0x0, /* src_mask */
151 0xffff, /* dst_mask */
152 FALSE), /* pcrel_offset */
153
154 HOWTO (R_CRX_REL24, /* type */
155 1, /* rightshift */
156 2, /* size */
157 24, /* bitsize */
158 TRUE, /* pc_relative */
159 0, /* bitpos */
160 complain_overflow_bitfield,/* complain_on_overflow */
161 bfd_elf_generic_reloc, /* special_function */
162 "R_CRX_REL24", /* name */
163 FALSE, /* partial_inplace */
164 0x0, /* src_mask */
165 0xffffff, /* dst_mask */
166 FALSE), /* pcrel_offset */
167
168 HOWTO (R_CRX_REL32, /* type */
169 1, /* rightshift */
170 2, /* size */
171 32, /* bitsize */
172 TRUE, /* pc_relative */
173 0, /* bitpos */
174 complain_overflow_bitfield,/* complain_on_overflow */
175 bfd_elf_generic_reloc, /* special_function */
176 "R_CRX_REL32", /* name */
177 FALSE, /* partial_inplace */
178 0x0, /* src_mask */
179 0xffffffff, /* dst_mask */
180 FALSE), /* pcrel_offset */
181
182 HOWTO (R_CRX_REGREL12, /* type */
183 0, /* rightshift */
184 1, /* size */
185 12, /* bitsize */
186 FALSE, /* pc_relative */
187 0, /* bitpos */
188 complain_overflow_bitfield,/* complain_on_overflow */
189 bfd_elf_generic_reloc, /* special_function */
190 "R_CRX_REGREL12", /* name */
191 FALSE, /* partial_inplace */
192 0x0, /* src_mask */
193 0xfff, /* dst_mask */
194 FALSE), /* pcrel_offset */
195
196 HOWTO (R_CRX_REGREL22, /* type */
197 0, /* rightshift */
198 2, /* size */
199 22, /* bitsize */
200 FALSE, /* pc_relative */
201 0, /* bitpos */
202 complain_overflow_bitfield,/* complain_on_overflow */
203 bfd_elf_generic_reloc, /* special_function */
204 "R_CRX_REGREL22", /* name */
205 FALSE, /* partial_inplace */
206 0x0, /* src_mask */
207 0x3fffff, /* dst_mask */
208 FALSE), /* pcrel_offset */
209
210 HOWTO (R_CRX_REGREL28, /* type */
211 0, /* rightshift */
212 2, /* size */
213 28, /* bitsize */
214 FALSE, /* pc_relative */
215 0, /* bitpos */
216 complain_overflow_bitfield,/* complain_on_overflow */
217 bfd_elf_generic_reloc, /* special_function */
218 "R_CRX_REGREL28", /* name */
219 FALSE, /* partial_inplace */
220 0x0, /* src_mask */
221 0xfffffff, /* dst_mask */
222 FALSE), /* pcrel_offset */
223
224 HOWTO (R_CRX_REGREL32, /* type */
225 0, /* rightshift */
226 2, /* size */
227 32, /* bitsize */
228 FALSE, /* pc_relative */
229 0, /* bitpos */
230 complain_overflow_bitfield,/* complain_on_overflow */
231 bfd_elf_generic_reloc, /* special_function */
232 "R_CRX_REGREL32", /* name */
233 FALSE, /* partial_inplace */
234 0x0, /* src_mask */
235 0xffffffff, /* dst_mask */
236 FALSE), /* pcrel_offset */
237
238 HOWTO (R_CRX_ABS16, /* type */
239 0, /* rightshift */
240 1, /* size */
241 16, /* bitsize */
242 FALSE, /* pc_relative */
243 0, /* bitpos */
244 complain_overflow_bitfield,/* complain_on_overflow */
245 bfd_elf_generic_reloc, /* special_function */
246 "R_CRX_ABS16", /* name */
247 FALSE, /* partial_inplace */
248 0x0, /* src_mask */
249 0xffff, /* dst_mask */
250 FALSE), /* pcrel_offset */
251
252 HOWTO (R_CRX_ABS32, /* type */
253 0, /* rightshift */
254 2, /* size */
255 32, /* bitsize */
256 FALSE, /* pc_relative */
257 0, /* bitpos */
258 complain_overflow_bitfield,/* complain_on_overflow */
259 bfd_elf_generic_reloc, /* special_function */
260 "R_CRX_ABS32", /* name */
261 FALSE, /* partial_inplace */
262 0x0, /* src_mask */
263 0xffffffff, /* dst_mask */
264 FALSE), /* pcrel_offset */
265
266 HOWTO (R_CRX_NUM8, /* type */
267 0, /* rightshift */
268 0, /* size */
269 8, /* bitsize */
270 FALSE, /* pc_relative */
271 0, /* bitpos */
272 complain_overflow_bitfield,/* complain_on_overflow */
273 bfd_elf_generic_reloc, /* special_function */
274 "R_CRX_NUM8", /* name */
275 FALSE, /* partial_inplace */
276 0x0, /* src_mask */
277 0xff, /* dst_mask */
278 FALSE), /* pcrel_offset */
279
280 HOWTO (R_CRX_NUM16, /* type */
281 0, /* rightshift */
282 1, /* size */
283 16, /* bitsize */
284 FALSE, /* pc_relative */
285 0, /* bitpos */
286 complain_overflow_bitfield,/* complain_on_overflow */
287 bfd_elf_generic_reloc, /* special_function */
288 "R_CRX_NUM16", /* name */
289 FALSE, /* partial_inplace */
290 0x0, /* src_mask */
291 0xffff, /* dst_mask */
292 FALSE), /* pcrel_offset */
293
294 HOWTO (R_CRX_NUM32, /* type */
295 0, /* rightshift */
296 2, /* size */
297 32, /* bitsize */
298 FALSE, /* pc_relative */
299 0, /* bitpos */
300 complain_overflow_bitfield,/* complain_on_overflow */
301 bfd_elf_generic_reloc, /* special_function */
302 "R_CRX_NUM32", /* name */
303 FALSE, /* partial_inplace */
304 0x0, /* src_mask */
305 0xffffffff, /* dst_mask */
306 FALSE), /* pcrel_offset */
307
308 HOWTO (R_CRX_IMM16, /* type */
309 0, /* rightshift */
310 1, /* size */
311 16, /* bitsize */
312 FALSE, /* pc_relative */
313 0, /* bitpos */
314 complain_overflow_bitfield,/* complain_on_overflow */
315 bfd_elf_generic_reloc, /* special_function */
316 "R_CRX_IMM16", /* name */
317 FALSE, /* partial_inplace */
318 0x0, /* src_mask */
319 0xffff, /* dst_mask */
320 FALSE), /* pcrel_offset */
321
322 HOWTO (R_CRX_IMM32, /* type */
323 0, /* rightshift */
324 2, /* size */
325 32, /* bitsize */
326 FALSE, /* pc_relative */
327 0, /* bitpos */
328 complain_overflow_bitfield,/* complain_on_overflow */
329 bfd_elf_generic_reloc, /* special_function */
330 "R_CRX_IMM32", /* name */
331 FALSE, /* partial_inplace */
332 0x0, /* src_mask */
333 0xffffffff, /* dst_mask */
334 FALSE), /* pcrel_offset */
335
336 /* An 8 bit switch table entry. This is generated for an expression
337 such as ``.byte L1 - L2''. The offset holds the difference
338 between the reloc address and L2. */
339 HOWTO (R_CRX_SWITCH8, /* type */
340 0, /* rightshift */
341 0, /* size (0 = byte, 1 = short, 2 = long) */
342 8, /* bitsize */
343 FALSE, /* pc_relative */
344 0, /* bitpos */
345 complain_overflow_unsigned, /* complain_on_overflow */
346 bfd_elf_generic_reloc, /* special_function */
347 "R_CRX_SWITCH8", /* name */
348 FALSE, /* partial_inplace */
349 0x0, /* src_mask */
350 0xff, /* dst_mask */
351 TRUE), /* pcrel_offset */
352
353 /* A 16 bit switch table entry. This is generated for an expression
354 such as ``.word L1 - L2''. The offset holds the difference
355 between the reloc address and L2. */
356 HOWTO (R_CRX_SWITCH16, /* type */
357 0, /* rightshift */
358 1, /* size (0 = byte, 1 = short, 2 = long) */
359 16, /* bitsize */
360 FALSE, /* pc_relative */
361 0, /* bitpos */
362 complain_overflow_unsigned, /* complain_on_overflow */
363 bfd_elf_generic_reloc, /* special_function */
364 "R_CRX_SWITCH16", /* name */
365 FALSE, /* partial_inplace */
366 0x0, /* src_mask */
367 0xffff, /* dst_mask */
368 TRUE), /* pcrel_offset */
369
370 /* A 32 bit switch table entry. This is generated for an expression
371 such as ``.long L1 - L2''. The offset holds the difference
372 between the reloc address and L2. */
373 HOWTO (R_CRX_SWITCH32, /* type */
374 0, /* rightshift */
375 2, /* size (0 = byte, 1 = short, 2 = long) */
376 32, /* bitsize */
377 FALSE, /* pc_relative */
378 0, /* bitpos */
379 complain_overflow_unsigned, /* complain_on_overflow */
380 bfd_elf_generic_reloc, /* special_function */
381 "R_CRX_SWITCH32", /* name */
382 FALSE, /* partial_inplace */
383 0x0, /* src_mask */
384 0xffffffff, /* dst_mask */
385 TRUE) /* pcrel_offset */
386 };
387
388 /* Retrieve a howto ptr using a BFD reloc_code. */
389
390 static reloc_howto_type *
391 elf_crx_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
392 bfd_reloc_code_real_type code)
393 {
394 unsigned int i;
395
396 for (i = 0; i < R_CRX_MAX; i++)
397 if (code == crx_reloc_map[i].bfd_reloc_enum)
398 return &crx_elf_howto_table[crx_reloc_map[i].crx_reloc_type];
399
400 printf ("This relocation Type is not supported -0x%x\n", code);
401 return 0;
402 }
403
404 static reloc_howto_type *
405 elf_crx_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
406 const char *r_name)
407 {
408 unsigned int i;
409
410 for (i = 0;
411 i < sizeof (crx_elf_howto_table) / sizeof (crx_elf_howto_table[0]);
412 i++)
413 if (crx_elf_howto_table[i].name != NULL
414 && strcasecmp (crx_elf_howto_table[i].name, r_name) == 0)
415 return &crx_elf_howto_table[i];
416
417 return NULL;
418 }
419
420 /* Retrieve a howto ptr using an internal relocation entry. */
421
422 static void
423 elf_crx_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
424 Elf_Internal_Rela *dst)
425 {
426 unsigned int r_type = ELF32_R_TYPE (dst->r_info);
427 BFD_ASSERT (r_type < (unsigned int) R_CRX_MAX);
428 cache_ptr->howto = &crx_elf_howto_table[r_type];
429 }
430
431 /* Perform a relocation as part of a final link. */
432
433 static bfd_reloc_status_type
434 crx_elf_final_link_relocate (reloc_howto_type *howto, bfd *input_bfd,
435 bfd *output_bfd ATTRIBUTE_UNUSED,
436 asection *input_section, bfd_byte *contents,
437 bfd_vma offset, bfd_vma Rvalue, bfd_vma addend,
438 struct bfd_link_info *info ATTRIBUTE_UNUSED,
439 asection *sec ATTRIBUTE_UNUSED,
440 int is_local ATTRIBUTE_UNUSED)
441 {
442 unsigned short r_type = howto->type;
443 bfd_byte *hit_data = contents + offset;
444 bfd_vma reloc_bits, check;
445
446 switch (r_type)
447 {
448 case R_CRX_IMM16:
449 case R_CRX_IMM32:
450 case R_CRX_ABS16:
451 case R_CRX_ABS32:
452 case R_CRX_REL8_CMP:
453 case R_CRX_REL16:
454 case R_CRX_REL24:
455 case R_CRX_REL32:
456 case R_CRX_REGREL12:
457 case R_CRX_REGREL22:
458 case R_CRX_REGREL28:
459 case R_CRX_REGREL32:
460 /* 'hit_data' is relative to the start of the instruction, not the
461 relocation offset. Advance it to account for the exact offset. */
462 hit_data += 2;
463 break;
464
465 case R_CRX_REL4:
466 /* This relocation type is used only in 'Branch if Equal to 0'
467 instructions and requires special handling. */
468 Rvalue -= 1;
469 break;
470
471 case R_CRX_NONE:
472 return bfd_reloc_ok;
473 break;
474
475 case R_CRX_SWITCH8:
476 case R_CRX_SWITCH16:
477 case R_CRX_SWITCH32:
478 /* We only care about the addend, where the difference between
479 expressions is kept. */
480 Rvalue = 0;
481
482 default:
483 break;
484 }
485
486 if (howto->pc_relative)
487 {
488 /* Subtract the address of the section containing the location. */
489 Rvalue -= (input_section->output_section->vma
490 + input_section->output_offset);
491 /* Subtract the position of the location within the section. */
492 Rvalue -= offset;
493 }
494
495 /* Add in supplied addend. */
496 Rvalue += addend;
497
498 /* Complain if the bitfield overflows, whether it is considered
499 as signed or unsigned. */
500 check = Rvalue >> howto->rightshift;
501
502 /* Assumes two's complement. This expression avoids
503 overflow if howto->bitsize is the number of bits in
504 bfd_vma. */
505 reloc_bits = (((1 << (howto->bitsize - 1)) - 1) << 1) | 1;
506
507 if (((bfd_vma) check & ~reloc_bits) != 0
508 && (((bfd_vma) check & ~reloc_bits)
509 != (-(bfd_vma) 1 & ~reloc_bits)))
510 {
511 /* The above right shift is incorrect for a signed
512 value. See if turning on the upper bits fixes the
513 overflow. */
514 if (howto->rightshift && (bfd_signed_vma) Rvalue < 0)
515 {
516 check |= ((bfd_vma) - 1
517 & ~((bfd_vma) - 1
518 >> howto->rightshift));
519 if (((bfd_vma) check & ~reloc_bits)
520 != (-(bfd_vma) 1 & ~reloc_bits))
521 return bfd_reloc_overflow;
522 }
523 else
524 return bfd_reloc_overflow;
525 }
526
527 /* Drop unwanted bits from the value we are relocating to. */
528 Rvalue >>= (bfd_vma) howto->rightshift;
529
530 /* Apply dst_mask to select only relocatable part of the insn. */
531 Rvalue &= howto->dst_mask;
532
533 switch (howto->size)
534 {
535 case 0:
536 if (r_type == R_CRX_REL4)
537 {
538 Rvalue <<= 4;
539 Rvalue |= (bfd_get_8 (input_bfd, hit_data) & 0x0f);
540 }
541
542 bfd_put_8 (input_bfd, (unsigned char) Rvalue, hit_data);
543 break;
544
545 case 1:
546 if (r_type == R_CRX_REGREL12)
547 Rvalue |= (bfd_get_16 (input_bfd, hit_data) & 0xf000);
548
549 bfd_put_16 (input_bfd, Rvalue, hit_data);
550 break;
551
552 case 2:
553 if (r_type == R_CRX_REL24
554 || r_type == R_CRX_REGREL22
555 || r_type == R_CRX_REGREL28)
556 Rvalue |= (((bfd_get_16 (input_bfd, hit_data) << 16) |
557 bfd_get_16 (input_bfd, hit_data + 2)) & ~howto->dst_mask);
558
559 if (r_type == R_CRX_NUM32 || r_type == R_CRX_SWITCH32)
560 /* Relocation on DATA is purely little-endian, that is, for a
561 multi-byte datum, the lowest address in memory contains the
562 little end of the datum, that is, the least significant byte.
563 Therefore we use BFD's byte Putting functions. */
564 bfd_put_32 (input_bfd, Rvalue, hit_data);
565 else
566 /* Relocation on INSTRUCTIONS is different : Instructions are
567 word-addressable, that is, each word itself is arranged according
568 to little-endian convention, whereas the words are arranged with
569 respect to one another in BIG ENDIAN fashion.
570 When there is an immediate value that spans a word boundary, it is
571 split in a big-endian way with respect to the words. */
572 {
573 bfd_put_16 (input_bfd, (Rvalue >> 16) & 0xffff, hit_data);
574 bfd_put_16 (input_bfd, Rvalue & 0xffff, hit_data + 2);
575 }
576 break;
577
578 default:
579 return bfd_reloc_notsupported;
580 }
581
582 return bfd_reloc_ok;
583 }
584
585 /* Delete some bytes from a section while relaxing. */
586
587 static bfd_boolean
588 elf32_crx_relax_delete_bytes (struct bfd_link_info *link_info, bfd *abfd,
589 asection *sec, bfd_vma addr, int count)
590 {
591 Elf_Internal_Shdr *symtab_hdr;
592 unsigned int sec_shndx;
593 bfd_byte *contents;
594 Elf_Internal_Rela *irel, *irelend;
595 bfd_vma toaddr;
596 Elf_Internal_Sym *isym;
597 Elf_Internal_Sym *isymend;
598 struct elf_link_hash_entry **sym_hashes;
599 struct elf_link_hash_entry **end_hashes;
600 struct elf_link_hash_entry **start_hashes;
601 unsigned int symcount;
602
603 sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
604
605 contents = elf_section_data (sec)->this_hdr.contents;
606
607 toaddr = sec->size;
608
609 irel = elf_section_data (sec)->relocs;
610 irelend = irel + sec->reloc_count;
611
612 /* Actually delete the bytes. */
613 memmove (contents + addr, contents + addr + count,
614 (size_t) (toaddr - addr - count));
615 sec->size -= count;
616
617 /* Adjust all the relocs. */
618 for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
619 {
620 /* Get the new reloc address. */
621 if ((irel->r_offset > addr
622 && irel->r_offset < toaddr))
623 irel->r_offset -= count;
624 }
625
626 /* Adjust the local symbols defined in this section. */
627 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
628 isym = (Elf_Internal_Sym *) symtab_hdr->contents;
629 for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
630 {
631 if (isym->st_shndx == sec_shndx
632 && isym->st_value > addr
633 && isym->st_value < toaddr)
634 {
635 /* Adjust the addend of SWITCH relocations in this section,
636 which reference this local symbol. */
637 for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
638 {
639 unsigned long r_symndx;
640 Elf_Internal_Sym *rsym;
641 bfd_vma addsym, subsym;
642
643 /* Skip if not a SWITCH relocation. */
644 if (ELF32_R_TYPE (irel->r_info) != (int) R_CRX_SWITCH8
645 && ELF32_R_TYPE (irel->r_info) != (int) R_CRX_SWITCH16
646 && ELF32_R_TYPE (irel->r_info) != (int) R_CRX_SWITCH32)
647 continue;
648
649 r_symndx = ELF32_R_SYM (irel->r_info);
650 rsym = (Elf_Internal_Sym *) symtab_hdr->contents + r_symndx;
651
652 /* Skip if not the local adjusted symbol. */
653 if (rsym != isym)
654 continue;
655
656 addsym = isym->st_value;
657 subsym = addsym - irel->r_addend;
658
659 /* Fix the addend only when -->> (addsym > addr >= subsym). */
660 if (subsym <= addr)
661 irel->r_addend -= count;
662 else
663 continue;
664 }
665
666 isym->st_value -= count;
667 }
668 }
669
670 /* Now adjust the global symbols defined in this section. */
671 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
672 - symtab_hdr->sh_info);
673 sym_hashes = start_hashes = elf_sym_hashes (abfd);
674 end_hashes = sym_hashes + symcount;
675
676 for (; sym_hashes < end_hashes; sym_hashes++)
677 {
678 struct elf_link_hash_entry *sym_hash = *sym_hashes;
679
680 /* The '--wrap SYMBOL' option is causing a pain when the object file,
681 containing the definition of __wrap_SYMBOL, includes a direct
682 call to SYMBOL as well. Since both __wrap_SYMBOL and SYMBOL reference
683 the same symbol (which is __wrap_SYMBOL), but still exist as two
684 different symbols in 'sym_hashes', we don't want to adjust
685 the global symbol __wrap_SYMBOL twice.
686 This check is only relevant when symbols are being wrapped. */
687 if (link_info->wrap_hash != NULL)
688 {
689 struct elf_link_hash_entry **cur_sym_hashes;
690
691 /* Loop only over the symbols whom been already checked. */
692 for (cur_sym_hashes = start_hashes; cur_sym_hashes < sym_hashes;
693 cur_sym_hashes++)
694 {
695 /* If the current symbol is identical to 'sym_hash', that means
696 the symbol was already adjusted (or at least checked). */
697 if (*cur_sym_hashes == sym_hash)
698 break;
699 }
700 /* Don't adjust the symbol again. */
701 if (cur_sym_hashes < sym_hashes)
702 continue;
703 }
704
705 if ((sym_hash->root.type == bfd_link_hash_defined
706 || sym_hash->root.type == bfd_link_hash_defweak)
707 && sym_hash->root.u.def.section == sec
708 && sym_hash->root.u.def.value > addr
709 && sym_hash->root.u.def.value < toaddr)
710 sym_hash->root.u.def.value -= count;
711 }
712
713 return TRUE;
714 }
715
716 /* This is a version of bfd_generic_get_relocated_section_contents
717 which uses elf32_crx_relocate_section. */
718
719 static bfd_byte *
720 elf32_crx_get_relocated_section_contents (bfd *output_bfd,
721 struct bfd_link_info *link_info,
722 struct bfd_link_order *link_order,
723 bfd_byte *data,
724 bfd_boolean relocatable,
725 asymbol **symbols)
726 {
727 Elf_Internal_Shdr *symtab_hdr;
728 asection *input_section = link_order->u.indirect.section;
729 bfd *input_bfd = input_section->owner;
730 asection **sections = NULL;
731 Elf_Internal_Rela *internal_relocs = NULL;
732 Elf_Internal_Sym *isymbuf = NULL;
733
734 /* We only need to handle the case of relaxing, or of having a
735 particular set of section contents, specially. */
736 if (relocatable
737 || elf_section_data (input_section)->this_hdr.contents == NULL)
738 return bfd_generic_get_relocated_section_contents (output_bfd, link_info,
739 link_order, data,
740 relocatable,
741 symbols);
742
743 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
744
745 memcpy (data, elf_section_data (input_section)->this_hdr.contents,
746 (size_t) input_section->size);
747
748 if ((input_section->flags & SEC_RELOC) != 0
749 && input_section->reloc_count > 0)
750 {
751 Elf_Internal_Sym *isym;
752 Elf_Internal_Sym *isymend;
753 asection **secpp;
754 bfd_size_type amt;
755
756 internal_relocs = (_bfd_elf_link_read_relocs
757 (input_bfd, input_section, (PTR) NULL,
758 (Elf_Internal_Rela *) NULL, FALSE));
759 if (internal_relocs == NULL)
760 goto error_return;
761
762 if (symtab_hdr->sh_info != 0)
763 {
764 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
765 if (isymbuf == NULL)
766 isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
767 symtab_hdr->sh_info, 0,
768 NULL, NULL, NULL);
769 if (isymbuf == NULL)
770 goto error_return;
771 }
772
773 amt = symtab_hdr->sh_info;
774 amt *= sizeof (asection *);
775 sections = bfd_malloc (amt);
776 if (sections == NULL && amt != 0)
777 goto error_return;
778
779 isymend = isymbuf + symtab_hdr->sh_info;
780 for (isym = isymbuf, secpp = sections; isym < isymend; ++isym, ++secpp)
781 {
782 asection *isec;
783
784 if (isym->st_shndx == SHN_UNDEF)
785 isec = bfd_und_section_ptr;
786 else if (isym->st_shndx == SHN_ABS)
787 isec = bfd_abs_section_ptr;
788 else if (isym->st_shndx == SHN_COMMON)
789 isec = bfd_com_section_ptr;
790 else
791 isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx);
792
793 *secpp = isec;
794 }
795
796 if (! elf32_crx_relocate_section (output_bfd, link_info, input_bfd,
797 input_section, data, internal_relocs,
798 isymbuf, sections))
799 goto error_return;
800
801 if (sections != NULL)
802 free (sections);
803 if (isymbuf != NULL
804 && symtab_hdr->contents != (unsigned char *) isymbuf)
805 free (isymbuf);
806 if (elf_section_data (input_section)->relocs != internal_relocs)
807 free (internal_relocs);
808 }
809
810 return data;
811
812 error_return:
813 if (sections != NULL)
814 free (sections);
815 if (isymbuf != NULL
816 && symtab_hdr->contents != (unsigned char *) isymbuf)
817 free (isymbuf);
818 if (internal_relocs != NULL
819 && elf_section_data (input_section)->relocs != internal_relocs)
820 free (internal_relocs);
821 return NULL;
822 }
823
824 /* Relocate a CRX ELF section. */
825
826 static bfd_boolean
827 elf32_crx_relocate_section (bfd *output_bfd, struct bfd_link_info *info,
828 bfd *input_bfd, asection *input_section,
829 bfd_byte *contents, Elf_Internal_Rela *relocs,
830 Elf_Internal_Sym *local_syms,
831 asection **local_sections)
832 {
833 Elf_Internal_Shdr *symtab_hdr;
834 struct elf_link_hash_entry **sym_hashes;
835 Elf_Internal_Rela *rel, *relend;
836
837 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
838 sym_hashes = elf_sym_hashes (input_bfd);
839
840 rel = relocs;
841 relend = relocs + input_section->reloc_count;
842 for (; rel < relend; rel++)
843 {
844 int r_type;
845 reloc_howto_type *howto;
846 unsigned long r_symndx;
847 Elf_Internal_Sym *sym;
848 asection *sec;
849 struct elf_link_hash_entry *h;
850 bfd_vma relocation;
851 bfd_reloc_status_type r;
852
853 r_symndx = ELF32_R_SYM (rel->r_info);
854 r_type = ELF32_R_TYPE (rel->r_info);
855 howto = crx_elf_howto_table + (r_type);
856
857 h = NULL;
858 sym = NULL;
859 sec = NULL;
860 if (r_symndx < symtab_hdr->sh_info)
861 {
862 sym = local_syms + r_symndx;
863 sec = local_sections[r_symndx];
864 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
865 }
866 else
867 {
868 bfd_boolean unresolved_reloc, warned;
869
870 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
871 r_symndx, symtab_hdr, sym_hashes,
872 h, sec, relocation,
873 unresolved_reloc, warned);
874 }
875
876 if (sec != NULL && elf_discarded_section (sec))
877 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
878 rel, relend, howto, contents);
879
880 if (info->relocatable)
881 continue;
882
883 r = crx_elf_final_link_relocate (howto, input_bfd, output_bfd,
884 input_section,
885 contents, rel->r_offset,
886 relocation, rel->r_addend,
887 info, sec, h == NULL);
888
889 if (r != bfd_reloc_ok)
890 {
891 const char *name;
892 const char *msg = (const char *) 0;
893
894 if (h != NULL)
895 name = h->root.root.string;
896 else
897 {
898 name = (bfd_elf_string_from_elf_section
899 (input_bfd, symtab_hdr->sh_link, sym->st_name));
900 if (name == NULL || *name == '\0')
901 name = bfd_section_name (input_bfd, sec);
902 }
903
904 switch (r)
905 {
906 case bfd_reloc_overflow:
907 if (!((*info->callbacks->reloc_overflow)
908 (info, (h ? &h->root : NULL), name, howto->name,
909 (bfd_vma) 0, input_bfd, input_section,
910 rel->r_offset)))
911 return FALSE;
912 break;
913
914 case bfd_reloc_undefined:
915 if (!((*info->callbacks->undefined_symbol)
916 (info, name, input_bfd, input_section,
917 rel->r_offset, TRUE)))
918 return FALSE;
919 break;
920
921 case bfd_reloc_outofrange:
922 msg = _("internal error: out of range error");
923 goto common_error;
924
925 case bfd_reloc_notsupported:
926 msg = _("internal error: unsupported relocation error");
927 goto common_error;
928
929 case bfd_reloc_dangerous:
930 msg = _("internal error: dangerous error");
931 goto common_error;
932
933 default:
934 msg = _("internal error: unknown error");
935 /* Fall through. */
936
937 common_error:
938 if (!((*info->callbacks->warning)
939 (info, msg, name, input_bfd, input_section,
940 rel->r_offset)))
941 return FALSE;
942 break;
943 }
944 }
945 }
946
947 return TRUE;
948 }
949
950 /* This function handles relaxing for the CRX.
951
952 There's quite a few relaxing opportunites available on the CRX:
953
954 * bal/bcond:32 -> bal/bcond:16 2 bytes
955 * bcond:16 -> bcond:8 2 bytes
956 * cmpbcond:24 -> cmpbcond:8 2 bytes
957 * arithmetic imm32 -> arithmetic imm16 2 bytes
958
959 Symbol- and reloc-reading infrastructure copied from elf-m10200.c. */
960
961 static bfd_boolean
962 elf32_crx_relax_section (bfd *abfd, asection *sec,
963 struct bfd_link_info *link_info, bfd_boolean *again)
964 {
965 Elf_Internal_Shdr *symtab_hdr;
966 Elf_Internal_Rela *internal_relocs;
967 Elf_Internal_Rela *irel, *irelend;
968 bfd_byte *contents = NULL;
969 Elf_Internal_Sym *isymbuf = NULL;
970
971 /* Assume nothing changes. */
972 *again = FALSE;
973
974 /* We don't have to do anything for a relocatable link, if
975 this section does not have relocs, or if this is not a
976 code section. */
977 if (link_info->relocatable
978 || (sec->flags & SEC_RELOC) == 0
979 || sec->reloc_count == 0
980 || (sec->flags & SEC_CODE) == 0)
981 return TRUE;
982
983 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
984
985 /* Get a copy of the native relocations. */
986 internal_relocs = (_bfd_elf_link_read_relocs
987 (abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
988 link_info->keep_memory));
989 if (internal_relocs == NULL)
990 goto error_return;
991
992 /* Walk through them looking for relaxing opportunities. */
993 irelend = internal_relocs + sec->reloc_count;
994 for (irel = internal_relocs; irel < irelend; irel++)
995 {
996 bfd_vma symval;
997
998 /* If this isn't something that can be relaxed, then ignore
999 this reloc. */
1000 if (ELF32_R_TYPE (irel->r_info) != (int) R_CRX_REL32
1001 && ELF32_R_TYPE (irel->r_info) != (int) R_CRX_REL16
1002 && ELF32_R_TYPE (irel->r_info) != (int) R_CRX_REL24
1003 && ELF32_R_TYPE (irel->r_info) != (int) R_CRX_IMM32)
1004 continue;
1005
1006 /* Get the section contents if we haven't done so already. */
1007 if (contents == NULL)
1008 {
1009 /* Get cached copy if it exists. */
1010 if (elf_section_data (sec)->this_hdr.contents != NULL)
1011 contents = elf_section_data (sec)->this_hdr.contents;
1012 /* Go get them off disk. */
1013 else if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1014 goto error_return;
1015 }
1016
1017 /* Read this BFD's local symbols if we haven't done so already. */
1018 if (isymbuf == NULL && symtab_hdr->sh_info != 0)
1019 {
1020 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1021 if (isymbuf == NULL)
1022 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
1023 symtab_hdr->sh_info, 0,
1024 NULL, NULL, NULL);
1025 if (isymbuf == NULL)
1026 goto error_return;
1027 }
1028
1029 /* Get the value of the symbol referred to by the reloc. */
1030 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
1031 {
1032 /* A local symbol. */
1033 Elf_Internal_Sym *isym;
1034 asection *sym_sec;
1035
1036 isym = isymbuf + ELF32_R_SYM (irel->r_info);
1037 if (isym->st_shndx == SHN_UNDEF)
1038 sym_sec = bfd_und_section_ptr;
1039 else if (isym->st_shndx == SHN_ABS)
1040 sym_sec = bfd_abs_section_ptr;
1041 else if (isym->st_shndx == SHN_COMMON)
1042 sym_sec = bfd_com_section_ptr;
1043 else
1044 sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
1045 symval = (isym->st_value
1046 + sym_sec->output_section->vma
1047 + sym_sec->output_offset);
1048 }
1049 else
1050 {
1051 unsigned long indx;
1052 struct elf_link_hash_entry *h;
1053
1054 /* An external symbol. */
1055 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
1056 h = elf_sym_hashes (abfd)[indx];
1057 BFD_ASSERT (h != NULL);
1058
1059 if (h->root.type != bfd_link_hash_defined
1060 && h->root.type != bfd_link_hash_defweak)
1061 /* This appears to be a reference to an undefined
1062 symbol. Just ignore it--it will be caught by the
1063 regular reloc processing. */
1064 continue;
1065
1066 symval = (h->root.u.def.value
1067 + h->root.u.def.section->output_section->vma
1068 + h->root.u.def.section->output_offset);
1069 }
1070
1071 /* For simplicity of coding, we are going to modify the section
1072 contents, the section relocs, and the BFD symbol table. We
1073 must tell the rest of the code not to free up this
1074 information. It would be possible to instead create a table
1075 of changes which have to be made, as is done in coff-mips.c;
1076 that would be more work, but would require less memory when
1077 the linker is run. */
1078
1079 /* Try to turn a 32bit pc-relative branch/call into
1080 a 16bit pc-relative branch/call. */
1081 if (ELF32_R_TYPE (irel->r_info) == (int) R_CRX_REL32)
1082 {
1083 bfd_vma value = symval;
1084
1085 /* Deal with pc-relative gunk. */
1086 value -= (sec->output_section->vma + sec->output_offset);
1087 value -= irel->r_offset;
1088 value += irel->r_addend;
1089
1090 /* See if the value will fit in 16 bits, note the high value is
1091 0xfffe + 2 as the target will be two bytes closer if we are
1092 able to relax. */
1093 if ((long) value < 0x10000 && (long) value > -0x10002)
1094 {
1095 unsigned short code;
1096
1097 /* Get the opcode. */
1098 code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset);
1099
1100 /* Verify it's a 'bal'/'bcond' and fix the opcode. */
1101 if ((code & 0xfff0) == 0x3170)
1102 bfd_put_8 (abfd, 0x30, contents + irel->r_offset + 1);
1103 else if ((code & 0xf0ff) == 0x707f)
1104 bfd_put_8 (abfd, 0x7e, contents + irel->r_offset);
1105 else
1106 continue;
1107
1108 /* Note that we've changed the relocs, section contents, etc. */
1109 elf_section_data (sec)->relocs = internal_relocs;
1110 elf_section_data (sec)->this_hdr.contents = contents;
1111 symtab_hdr->contents = (unsigned char *) isymbuf;
1112
1113 /* Fix the relocation's type. */
1114 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1115 R_CRX_REL16);
1116
1117 /* Delete two bytes of data. */
1118 if (!elf32_crx_relax_delete_bytes (link_info, abfd, sec,
1119 irel->r_offset + 2, 2))
1120 goto error_return;
1121
1122 /* That will change things, so, we should relax again.
1123 Note that this is not required, and it may be slow. */
1124 *again = TRUE;
1125 }
1126 }
1127
1128 /* Try to turn a 16bit pc-relative branch into an
1129 8bit pc-relative branch. */
1130 if (ELF32_R_TYPE (irel->r_info) == (int) R_CRX_REL16)
1131 {
1132 bfd_vma value = symval;
1133
1134 /* Deal with pc-relative gunk. */
1135 value -= (sec->output_section->vma + sec->output_offset);
1136 value -= irel->r_offset;
1137 value += irel->r_addend;
1138
1139 /* See if the value will fit in 8 bits, note the high value is
1140 0xfc + 2 as the target will be two bytes closer if we are
1141 able to relax. */
1142 if ((long) value < 0xfe && (long) value > -0x100)
1143 {
1144 unsigned short code;
1145
1146 /* Get the opcode. */
1147 code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset);
1148
1149 /* Verify it's a 'bcond' opcode. */
1150 if ((code & 0xf0ff) != 0x707e)
1151 continue;
1152
1153 /* Note that we've changed the relocs, section contents, etc. */
1154 elf_section_data (sec)->relocs = internal_relocs;
1155 elf_section_data (sec)->this_hdr.contents = contents;
1156 symtab_hdr->contents = (unsigned char *) isymbuf;
1157
1158 /* Fix the relocation's type. */
1159 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1160 R_CRX_REL8);
1161
1162 /* Delete two bytes of data. */
1163 if (!elf32_crx_relax_delete_bytes (link_info, abfd, sec,
1164 irel->r_offset + 2, 2))
1165 goto error_return;
1166
1167 /* That will change things, so, we should relax again.
1168 Note that this is not required, and it may be slow. */
1169 *again = TRUE;
1170 }
1171 }
1172
1173 /* Try to turn a 24bit pc-relative cmp&branch into
1174 an 8bit pc-relative cmp&branch. */
1175 if (ELF32_R_TYPE (irel->r_info) == (int) R_CRX_REL24)
1176 {
1177 bfd_vma value = symval;
1178
1179 /* Deal with pc-relative gunk. */
1180 value -= (sec->output_section->vma + sec->output_offset);
1181 value -= irel->r_offset;
1182 value += irel->r_addend;
1183
1184 /* See if the value will fit in 8 bits, note the high value is
1185 0x7e + 2 as the target will be two bytes closer if we are
1186 able to relax. */
1187 if ((long) value < 0x100 && (long) value > -0x100)
1188 {
1189 unsigned short code;
1190
1191 /* Get the opcode. */
1192 code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset);
1193
1194 /* Verify it's a 'cmp&branch' opcode. */
1195 if ((code & 0xfff0) != 0x3180 && (code & 0xfff0) != 0x3190
1196 && (code & 0xfff0) != 0x31a0 && (code & 0xfff0) != 0x31c0
1197 && (code & 0xfff0) != 0x31d0 && (code & 0xfff0) != 0x31e0
1198 /* Or a Co-processor branch ('bcop'). */
1199 && (code & 0xfff0) != 0x3010 && (code & 0xfff0) != 0x3110)
1200 continue;
1201
1202 /* Note that we've changed the relocs, section contents, etc. */
1203 elf_section_data (sec)->relocs = internal_relocs;
1204 elf_section_data (sec)->this_hdr.contents = contents;
1205 symtab_hdr->contents = (unsigned char *) isymbuf;
1206
1207 /* Fix the opcode. */
1208 bfd_put_8 (abfd, 0x30, contents + irel->r_offset + 1);
1209
1210 /* Fix the relocation's type. */
1211 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1212 R_CRX_REL8_CMP);
1213
1214 /* Delete two bytes of data. */
1215 if (!elf32_crx_relax_delete_bytes (link_info, abfd, sec,
1216 irel->r_offset + 4, 2))
1217 goto error_return;
1218
1219 /* That will change things, so, we should relax again.
1220 Note that this is not required, and it may be slow. */
1221 *again = TRUE;
1222 }
1223 }
1224
1225 /* Try to turn a 32bit immediate address into
1226 a 16bit immediate address. */
1227 if (ELF32_R_TYPE (irel->r_info) == (int) R_CRX_IMM32)
1228 {
1229 bfd_vma value = symval;
1230
1231 /* See if the value will fit in 16 bits. */
1232 if ((long) value < 0x7fff && (long) value > -0x8000)
1233 {
1234 unsigned short code;
1235
1236 /* Get the opcode. */
1237 code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset);
1238
1239 /* Verify it's a 'arithmetic double'. */
1240 if ((code & 0xf0f0) != 0x20f0)
1241 continue;
1242
1243 /* Note that we've changed the relocs, section contents, etc. */
1244 elf_section_data (sec)->relocs = internal_relocs;
1245 elf_section_data (sec)->this_hdr.contents = contents;
1246 symtab_hdr->contents = (unsigned char *) isymbuf;
1247
1248 /* Fix the opcode. */
1249 bfd_put_8 (abfd, (code & 0xff) - 0x10, contents + irel->r_offset);
1250
1251 /* Fix the relocation's type. */
1252 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1253 R_CRX_IMM16);
1254
1255 /* Delete two bytes of data. */
1256 if (!elf32_crx_relax_delete_bytes (link_info, abfd, sec,
1257 irel->r_offset + 2, 2))
1258 goto error_return;
1259
1260 /* That will change things, so, we should relax again.
1261 Note that this is not required, and it may be slow. */
1262 *again = TRUE;
1263 }
1264 }
1265 }
1266
1267 if (isymbuf != NULL
1268 && symtab_hdr->contents != (unsigned char *) isymbuf)
1269 {
1270 if (! link_info->keep_memory)
1271 free (isymbuf);
1272 else
1273 {
1274 /* Cache the symbols for elf_link_input_bfd. */
1275 symtab_hdr->contents = (unsigned char *) isymbuf;
1276 }
1277 }
1278
1279 if (contents != NULL
1280 && elf_section_data (sec)->this_hdr.contents != contents)
1281 {
1282 if (! link_info->keep_memory)
1283 free (contents);
1284 else
1285 {
1286 /* Cache the section contents for elf_link_input_bfd. */
1287 elf_section_data (sec)->this_hdr.contents = contents;
1288 }
1289 }
1290
1291 if (internal_relocs != NULL
1292 && elf_section_data (sec)->relocs != internal_relocs)
1293 free (internal_relocs);
1294
1295 return TRUE;
1296
1297 error_return:
1298 if (isymbuf != NULL
1299 && symtab_hdr->contents != (unsigned char *) isymbuf)
1300 free (isymbuf);
1301 if (contents != NULL
1302 && elf_section_data (sec)->this_hdr.contents != contents)
1303 free (contents);
1304 if (internal_relocs != NULL
1305 && elf_section_data (sec)->relocs != internal_relocs)
1306 free (internal_relocs);
1307
1308 return FALSE;
1309 }
1310
1311 /* Definitions for setting CRX target vector. */
1312 #define TARGET_LITTLE_SYM bfd_elf32_crx_vec
1313 #define TARGET_LITTLE_NAME "elf32-crx"
1314 #define ELF_ARCH bfd_arch_crx
1315 #define ELF_MACHINE_CODE EM_CRX
1316 #define ELF_MAXPAGESIZE 0x1
1317 #define elf_symbol_leading_char '_'
1318
1319 #define bfd_elf32_bfd_reloc_type_lookup elf_crx_reloc_type_lookup
1320 #define bfd_elf32_bfd_reloc_name_lookup \
1321 elf_crx_reloc_name_lookup
1322 #define elf_info_to_howto elf_crx_info_to_howto
1323 #define elf_info_to_howto_rel 0
1324 #define elf_backend_relocate_section elf32_crx_relocate_section
1325 #define bfd_elf32_bfd_relax_section elf32_crx_relax_section
1326 #define bfd_elf32_bfd_get_relocated_section_contents \
1327 elf32_crx_get_relocated_section_contents
1328 #define elf_backend_can_gc_sections 1
1329 #define elf_backend_rela_normal 1
1330
1331 #include "elf32-target.h"
GDB Binutils - Deliverables
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