1 /* 32-bit ELF support for S+core.
2 Copyright (C) 2009-2020 Free Software Foundation, Inc.
3 Contributed by
4 Brain.lin (brain.lin@sunplusct.com)
5 Mei Ligang (ligang@sunnorth.com.cn)
6 Pei-Lin Tsai (pltsai@sunplus.com)
7
8 This file is part of BFD, the Binary File Descriptor library.
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
23 MA 02110-1301, USA. */
24
25 #include "sysdep.h"
26 #include "bfd.h"
27 #include "libbfd.h"
28 #include "libiberty.h"
29 #include "elf-bfd.h"
30 #include "elf/score.h"
31 #include "elf/common.h"
32 #include "elf/internal.h"
33 #include "hashtab.h"
34 #include "elf32-score.h"
35
36
37 /* The SCORE ELF linker needs additional information for each symbol in
38 the global hash table. */
39 struct score_elf_link_hash_entry
40 {
41 struct elf_link_hash_entry root;
42
43 /* Number of R_SCORE_ABS32, R_SCORE_REL32 relocs against this symbol. */
44 unsigned int possibly_dynamic_relocs;
45
46 /* If the R_SCORE_ABS32, R_SCORE_REL32 reloc is against a readonly section. */
47 bfd_boolean readonly_reloc;
48
49 /* We must not create a stub for a symbol that has relocations related to
50 taking the function's address, i.e. any but R_SCORE_CALL15 ones. */
51 bfd_boolean no_fn_stub;
52
53 /* Are we forced local? This will only be set if we have converted
54 the initial global GOT entry to a local GOT entry. */
55 bfd_boolean forced_local;
56 };
57
58 /* Traverse a score ELF linker hash table. */
59 #define score_elf_link_hash_traverse(table, func, info) \
60 (elf_link_hash_traverse \
61 ((table), \
62 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \
63 (info)))
64
65 /* This structure is used to hold .got entries while estimating got sizes. */
66 struct score_got_entry
67 {
68 /* The input bfd in which the symbol is defined. */
69 bfd *abfd;
70 /* The index of the symbol, as stored in the relocation r_info, if
71 we have a local symbol; -1 otherwise. */
72 long symndx;
73 union
74 {
75 /* If abfd == NULL, an address that must be stored in the got. */
76 bfd_vma address;
77 /* If abfd != NULL && symndx != -1, the addend of the relocation
78 that should be added to the symbol value. */
79 bfd_vma addend;
80 /* If abfd != NULL && symndx == -1, the hash table entry
81 corresponding to a global symbol in the got (or, local, if
82 h->forced_local). */
83 struct score_elf_link_hash_entry *h;
84 } d;
85
86 /* The offset from the beginning of the .got section to the entry
87 corresponding to this symbol+addend. If it's a global symbol
88 whose offset is yet to be decided, it's going to be -1. */
89 long gotidx;
90 };
91
92 /* This structure is passed to score_elf_sort_hash_table_f when sorting
93 the dynamic symbols. */
94 struct score_elf_hash_sort_data
95 {
96 /* The symbol in the global GOT with the lowest dynamic symbol table index. */
97 struct elf_link_hash_entry *low;
98 /* The least dynamic symbol table index corresponding to a symbol with a GOT entry. */
99 long min_got_dynindx;
100 /* The greatest dynamic symbol table index corresponding to a symbol
101 with a GOT entry that is not referenced (e.g., a dynamic symbol
102 with dynamic relocations pointing to it from non-primary GOTs). */
103 long max_unref_got_dynindx;
104 /* The greatest dynamic symbol table index not corresponding to a
105 symbol without a GOT entry. */
106 long max_non_got_dynindx;
107 };
108
109 struct score_got_info
110 {
111 /* The global symbol in the GOT with the lowest index in the dynamic
112 symbol table. */
113 struct elf_link_hash_entry *global_gotsym;
114 /* The number of global .got entries. */
115 unsigned int global_gotno;
116 /* The number of local .got entries. */
117 unsigned int local_gotno;
118 /* The number of local .got entries we have used. */
119 unsigned int assigned_gotno;
120 /* A hash table holding members of the got. */
121 struct htab *got_entries;
122 /* In multi-got links, a pointer to the next got (err, rather, most
123 of the time, it points to the previous got). */
124 struct score_got_info *next;
125 };
126
127 /* A structure used to count GOT entries, for GOT entry or ELF symbol table traversal. */
128 struct _score_elf_section_data
129 {
130 struct bfd_elf_section_data elf;
131 union
132 {
133 struct score_got_info *got_info;
134 bfd_byte *tdata;
135 }
136 u;
137 };
138
139 #define score_elf_section_data(sec) \
140 ((struct _score_elf_section_data *) elf_section_data (sec))
141
142 /* The size of a symbol-table entry. */
143 #define SCORE_ELF_SYM_SIZE(abfd) \
144 (get_elf_backend_data (abfd)->s->sizeof_sym)
145
146 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
147 from smaller values. Start with zero, widen, *then* decrement. */
148 #define MINUS_ONE (((bfd_vma)0) - 1)
149 #define MINUS_TWO (((bfd_vma)0) - 2)
150
151 #define PDR_SIZE 32
152
153
154 /* The number of local .got entries we reserve. */
155 #define SCORE_RESERVED_GOTNO (2)
156 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
157
158 /* The offset of $gp from the beginning of the .got section. */
159 #define ELF_SCORE_GP_OFFSET(abfd) (0x3ff0)
160
161 /* The maximum size of the GOT for it to be addressable using 15-bit offsets from $gp. */
162 #define SCORE_ELF_GOT_MAX_SIZE(abfd) (ELF_SCORE_GP_OFFSET(abfd) + 0x3fff)
163
164 #define SCORE_ELF_STUB_SECTION_NAME (".SCORE.stub")
165 #define SCORE_FUNCTION_STUB_SIZE (16)
166
167 #define STUB_LW 0xc3bcc010 /* lw r29, [r28, -0x3ff0] */
168 #define STUB_MOVE 0x8323bc56 /* mv r25, r3 */
169 #define STUB_LI16 0x87548000 /* ori r26, .dynsym_index */
170 #define STUB_BRL 0x801dbc09 /* brl r29 */
171
172 #define SCORE_ELF_GOT_SIZE(abfd) \
173 (get_elf_backend_data (abfd)->s->arch_size / 8)
174
175 #define SCORE_ELF_ADD_DYNAMIC_ENTRY(info, tag, val) \
176 (_bfd_elf_add_dynamic_entry (info, (bfd_vma) tag, (bfd_vma) val))
177
178 /* The size of an external dynamic table entry. */
179 #define SCORE_ELF_DYN_SIZE(abfd) \
180 (get_elf_backend_data (abfd)->s->sizeof_dyn)
181
182 /* The size of an external REL relocation. */
183 #define SCORE_ELF_REL_SIZE(abfd) \
184 (get_elf_backend_data (abfd)->s->sizeof_rel)
185
186 /* The default alignment for sections, as a power of two. */
187 #define SCORE_ELF_LOG_FILE_ALIGN(abfd)\
188 (get_elf_backend_data (abfd)->s->log_file_align)
189
190 static bfd_byte *hi16_rel_addr;
191
192 /* This will be used when we sort the dynamic relocation records. */
193 static bfd *reldyn_sorting_bfd;
194
195 /* SCORE ELF uses two common sections. One is the usual one, and the
196 other is for small objects. All the small objects are kept
197 together, and then referenced via the gp pointer, which yields
198 faster assembler code. This is what we use for the small common
199 section. This approach is copied from ecoff.c. */
200 static asection score_elf_scom_section;
201 static asymbol score_elf_scom_symbol;
202 static asymbol * score_elf_scom_symbol_ptr;
203
204 static bfd_reloc_status_type
score_elf_hi16_reloc(bfd * abfd ATTRIBUTE_UNUSED,arelent * reloc_entry,asymbol * symbol ATTRIBUTE_UNUSED,void * data,asection * input_section ATTRIBUTE_UNUSED,bfd * output_bfd ATTRIBUTE_UNUSED,char ** error_message ATTRIBUTE_UNUSED)205 score_elf_hi16_reloc (bfd *abfd ATTRIBUTE_UNUSED,
206 arelent *reloc_entry,
207 asymbol *symbol ATTRIBUTE_UNUSED,
208 void * data,
209 asection *input_section ATTRIBUTE_UNUSED,
210 bfd *output_bfd ATTRIBUTE_UNUSED,
211 char **error_message ATTRIBUTE_UNUSED)
212 {
213 hi16_rel_addr = (bfd_byte *) data + reloc_entry->address;
214 return bfd_reloc_ok;
215 }
216
217 static bfd_reloc_status_type
score_elf_lo16_reloc(bfd * abfd,arelent * reloc_entry,asymbol * symbol ATTRIBUTE_UNUSED,void * data,asection * input_section,bfd * output_bfd ATTRIBUTE_UNUSED,char ** error_message ATTRIBUTE_UNUSED)218 score_elf_lo16_reloc (bfd *abfd,
219 arelent *reloc_entry,
220 asymbol *symbol ATTRIBUTE_UNUSED,
221 void * data,
222 asection *input_section,
223 bfd *output_bfd ATTRIBUTE_UNUSED,
224 char **error_message ATTRIBUTE_UNUSED)
225 {
226 bfd_vma addend = 0, offset = 0;
227 unsigned long val;
228 unsigned long hi16_offset, hi16_value, uvalue;
229
230 hi16_value = bfd_get_32 (abfd, hi16_rel_addr);
231 hi16_offset = ((((hi16_value >> 16) & 0x3) << 15) | (hi16_value & 0x7fff)) >> 1;
232 addend = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
233 offset = ((((addend >> 16) & 0x3) << 15) | (addend & 0x7fff)) >> 1;
234 val = reloc_entry->addend;
235 if (reloc_entry->address > input_section->size)
236 return bfd_reloc_outofrange;
237 uvalue = ((hi16_offset << 16) | (offset & 0xffff)) + val;
238 hi16_offset = (uvalue >> 16) << 1;
239 hi16_value = (hi16_value & ~0x37fff) | (hi16_offset & 0x7fff) | ((hi16_offset << 1) & 0x30000);
240 bfd_put_32 (abfd, hi16_value, hi16_rel_addr);
241 offset = (uvalue & 0xffff) << 1;
242 addend = (addend & ~0x37fff) | (offset & 0x7fff) | ((offset << 1) & 0x30000);
243 bfd_put_32 (abfd, addend, (bfd_byte *) data + reloc_entry->address);
244 return bfd_reloc_ok;
245 }
246
247 /* Set the GP value for OUTPUT_BFD. Returns FALSE if this is a
248 dangerous relocation. */
249
250 static bfd_boolean
score_elf_assign_gp(bfd * output_bfd,bfd_vma * pgp)251 score_elf_assign_gp (bfd *output_bfd, bfd_vma *pgp)
252 {
253 unsigned int count;
254 asymbol **sym;
255 unsigned int i;
256
257 /* If we've already figured out what GP will be, just return it. */
258 *pgp = _bfd_get_gp_value (output_bfd);
259 if (*pgp)
260 return TRUE;
261
262 count = bfd_get_symcount (output_bfd);
263 sym = bfd_get_outsymbols (output_bfd);
264
265 /* The linker script will have created a symbol named `_gp' with the
266 appropriate value. */
267 if (sym == NULL)
268 i = count;
269 else
270 {
271 for (i = 0; i < count; i++, sym++)
272 {
273 const char *name;
274
275 name = bfd_asymbol_name (*sym);
276 if (*name == '_' && strcmp (name, "_gp") == 0)
277 {
278 *pgp = bfd_asymbol_value (*sym);
279 _bfd_set_gp_value (output_bfd, *pgp);
280 break;
281 }
282 }
283 }
284
285 if (i >= count)
286 {
287 /* Only get the error once. */
288 *pgp = 4;
289 _bfd_set_gp_value (output_bfd, *pgp);
290 return FALSE;
291 }
292
293 return TRUE;
294 }
295
296 /* We have to figure out the gp value, so that we can adjust the
297 symbol value correctly. We look up the symbol _gp in the output
298 BFD. If we can't find it, we're stuck. We cache it in the ELF
299 target data. We don't need to adjust the symbol value for an
300 external symbol if we are producing relocatable output. */
301
302 static bfd_reloc_status_type
score_elf_final_gp(bfd * output_bfd,asymbol * symbol,bfd_boolean relocatable,char ** error_message,bfd_vma * pgp)303 score_elf_final_gp (bfd *output_bfd,
304 asymbol *symbol,
305 bfd_boolean relocatable,
306 char **error_message,
307 bfd_vma *pgp)
308 {
309 if (bfd_is_und_section (symbol->section)
310 && ! relocatable)
311 {
312 *pgp = 0;
313 return bfd_reloc_undefined;
314 }
315
316 *pgp = _bfd_get_gp_value (output_bfd);
317 if (*pgp == 0
318 && (! relocatable
319 || (symbol->flags & BSF_SECTION_SYM) != 0))
320 {
321 if (relocatable)
322 {
323 /* Make up a value. */
324 *pgp = symbol->section->output_section->vma + 0x4000;
325 _bfd_set_gp_value (output_bfd, *pgp);
326 }
327 else if (!score_elf_assign_gp (output_bfd, pgp))
328 {
329 *error_message =
330 (char *) _("GP relative relocation when _gp not defined");
331 return bfd_reloc_dangerous;
332 }
333 }
334
335 return bfd_reloc_ok;
336 }
337
338 static bfd_reloc_status_type
score_elf_gprel15_with_gp(bfd * abfd,asymbol * symbol,arelent * reloc_entry,asection * input_section,bfd_boolean relocateable,void * data,bfd_vma gp ATTRIBUTE_UNUSED)339 score_elf_gprel15_with_gp (bfd *abfd,
340 asymbol *symbol,
341 arelent *reloc_entry,
342 asection *input_section,
343 bfd_boolean relocateable,
344 void * data,
345 bfd_vma gp ATTRIBUTE_UNUSED)
346 {
347 bfd_vma relocation;
348 unsigned long insn;
349
350 if (bfd_is_com_section (symbol->section))
351 relocation = 0;
352 else
353 relocation = symbol->value;
354
355 relocation += symbol->section->output_section->vma;
356 relocation += symbol->section->output_offset;
357 if (reloc_entry->address > input_section->size)
358 return bfd_reloc_outofrange;
359
360 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
361 if (((reloc_entry->addend & 0xffffc000) != 0)
362 && ((reloc_entry->addend & 0xffffc000) != 0xffffc000))
363 return bfd_reloc_overflow;
364
365 insn = (insn & ~0x7fff) | (reloc_entry->addend & 0x7fff);
366 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
367 if (relocateable)
368 reloc_entry->address += input_section->output_offset;
369
370 return bfd_reloc_ok;
371 }
372
373 static bfd_reloc_status_type
gprel32_with_gp(bfd * abfd,asymbol * symbol,arelent * reloc_entry,asection * input_section,bfd_boolean relocatable,void * data,bfd_vma gp)374 gprel32_with_gp (bfd *abfd, asymbol *symbol, arelent *reloc_entry,
375 asection *input_section, bfd_boolean relocatable,
376 void *data, bfd_vma gp)
377 {
378 bfd_vma relocation;
379 bfd_vma val;
380
381 if (bfd_is_com_section (symbol->section))
382 relocation = 0;
383 else
384 relocation = symbol->value;
385
386 relocation += symbol->section->output_section->vma;
387 relocation += symbol->section->output_offset;
388
389 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
390 return bfd_reloc_outofrange;
391
392 /* Set val to the offset into the section or symbol. */
393 val = reloc_entry->addend;
394
395 if (reloc_entry->howto->partial_inplace)
396 val += bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
397
398 /* Adjust val for the final section location and GP value. If we
399 are producing relocatable output, we don't want to do this for
400 an external symbol. */
401 if (! relocatable
402 || (symbol->flags & BSF_SECTION_SYM) != 0)
403 val += relocation - gp;
404
405 if (reloc_entry->howto->partial_inplace)
406 bfd_put_32 (abfd, val, (bfd_byte *) data + reloc_entry->address);
407 else
408 reloc_entry->addend = val;
409
410 if (relocatable)
411 reloc_entry->address += input_section->output_offset;
412
413 return bfd_reloc_ok;
414 }
415
416 static bfd_reloc_status_type
score_elf_gprel15_reloc(bfd * abfd,arelent * reloc_entry,asymbol * symbol,void * data,asection * input_section,bfd * output_bfd,char ** error_message)417 score_elf_gprel15_reloc (bfd *abfd,
418 arelent *reloc_entry,
419 asymbol *symbol,
420 void * data,
421 asection *input_section,
422 bfd *output_bfd,
423 char **error_message)
424 {
425 bfd_boolean relocateable;
426 bfd_reloc_status_type ret;
427 bfd_vma gp;
428
429 if (output_bfd != NULL
430 && (symbol->flags & BSF_SECTION_SYM) == 0 && reloc_entry->addend == 0)
431 {
432 reloc_entry->address += input_section->output_offset;
433 return bfd_reloc_ok;
434 }
435 if (output_bfd != NULL)
436 relocateable = TRUE;
437 else
438 {
439 relocateable = FALSE;
440 output_bfd = symbol->section->output_section->owner;
441 }
442
443 ret = score_elf_final_gp (output_bfd, symbol, relocateable, error_message, &gp);
444 if (ret != bfd_reloc_ok)
445 return ret;
446
447 return score_elf_gprel15_with_gp (abfd, symbol, reloc_entry,
448 input_section, relocateable, data, gp);
449 }
450
451 /* Do a R_SCORE_GPREL32 relocation. This is a 32 bit value which must
452 become the offset from the gp register. */
453
454 static bfd_reloc_status_type
score_elf_gprel32_reloc(bfd * abfd,arelent * reloc_entry,asymbol * symbol,void * data,asection * input_section,bfd * output_bfd,char ** error_message)455 score_elf_gprel32_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
456 void *data, asection *input_section, bfd *output_bfd,
457 char **error_message)
458 {
459 bfd_boolean relocatable;
460 bfd_reloc_status_type ret;
461 bfd_vma gp;
462
463 /* R_SCORE_GPREL32 relocations are defined for local symbols only. */
464 if (output_bfd != NULL
465 && (symbol->flags & BSF_SECTION_SYM) == 0
466 && (symbol->flags & BSF_LOCAL) != 0)
467 {
468 *error_message = (char *)
469 _("32bits gp relative relocation occurs for an external symbol");
470 return bfd_reloc_outofrange;
471 }
472
473 if (output_bfd != NULL)
474 relocatable = TRUE;
475 else
476 {
477 relocatable = FALSE;
478 output_bfd = symbol->section->output_section->owner;
479 }
480
481 ret = score_elf_final_gp (output_bfd, symbol, relocatable, error_message, &gp);
482 if (ret != bfd_reloc_ok)
483 return ret;
484
485 gp = 0;
486 return gprel32_with_gp (abfd, symbol, reloc_entry, input_section,
487 relocatable, data, gp);
488 }
489
490 /* A howto special_function for R_SCORE_GOT15 relocations. This is just
491 like any other 16-bit relocation when applied to global symbols, but is
492 treated in the same as R_SCORE_HI16 when applied to local symbols. */
493
494 static bfd_reloc_status_type
score_elf_got15_reloc(bfd * abfd,arelent * reloc_entry,asymbol * symbol,void * data,asection * input_section,bfd * output_bfd,char ** error_message)495 score_elf_got15_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
496 void *data, asection *input_section,
497 bfd *output_bfd, char **error_message)
498 {
499 if ((symbol->flags & (BSF_GLOBAL | BSF_WEAK)) != 0
500 || bfd_is_und_section (bfd_asymbol_section (symbol))
501 || bfd_is_com_section (bfd_asymbol_section (symbol)))
502 /* The relocation is against a global symbol. */
503 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
504 input_section, output_bfd,
505 error_message);
506
507 return score_elf_hi16_reloc (abfd, reloc_entry, symbol, data,
508 input_section, output_bfd, error_message);
509 }
510
511 static bfd_reloc_status_type
score_elf_got_lo16_reloc(bfd * abfd,arelent * reloc_entry,asymbol * symbol ATTRIBUTE_UNUSED,void * data,asection * input_section,bfd * output_bfd ATTRIBUTE_UNUSED,char ** error_message ATTRIBUTE_UNUSED)512 score_elf_got_lo16_reloc (bfd *abfd,
513 arelent *reloc_entry,
514 asymbol *symbol ATTRIBUTE_UNUSED,
515 void * data,
516 asection *input_section,
517 bfd *output_bfd ATTRIBUTE_UNUSED,
518 char **error_message ATTRIBUTE_UNUSED)
519 {
520 bfd_vma addend = 0, offset = 0;
521 signed long val;
522 signed long hi16_offset, hi16_value, uvalue;
523
524 hi16_value = bfd_get_32 (abfd, hi16_rel_addr);
525 hi16_offset = ((((hi16_value >> 16) & 0x3) << 15) | (hi16_value & 0x7fff)) >> 1;
526 addend = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
527 offset = ((((addend >> 16) & 0x3) << 15) | (addend & 0x7fff)) >> 1;
528 val = reloc_entry->addend;
529 if (reloc_entry->address > input_section->size)
530 return bfd_reloc_outofrange;
531 uvalue = ((hi16_offset << 16) | (offset & 0xffff)) + val;
532 if ((uvalue > -0x8000) && (uvalue < 0x7fff))
533 hi16_offset = 0;
534 else
535 hi16_offset = (uvalue >> 16) & 0x7fff;
536 hi16_value = (hi16_value & ~0x37fff) | (hi16_offset & 0x7fff) | ((hi16_offset << 1) & 0x30000);
537 bfd_put_32 (abfd, hi16_value, hi16_rel_addr);
538 offset = (uvalue & 0xffff) << 1;
539 addend = (addend & ~0x37fff) | (offset & 0x7fff) | ((offset << 1) & 0x30000);
540 bfd_put_32 (abfd, addend, (bfd_byte *) data + reloc_entry->address);
541 return bfd_reloc_ok;
542 }
543
544 static reloc_howto_type elf32_score_howto_table[] =
545 {
546 /* No relocation. */
547 HOWTO (R_SCORE_NONE, /* type */
548 0, /* rightshift */
549 3, /* size (0 = byte, 1 = short, 2 = long) */
550 0, /* bitsize */
551 FALSE, /* pc_relative */
552 0, /* bitpos */
553 complain_overflow_dont,/* complain_on_overflow */
554 bfd_elf_generic_reloc, /* special_function */
555 "R_SCORE_NONE", /* name */
556 FALSE, /* partial_inplace */
557 0, /* src_mask */
558 0, /* dst_mask */
559 FALSE), /* pcrel_offset */
560
561 /* R_SCORE_HI16 */
562 HOWTO (R_SCORE_HI16, /* type */
563 0, /* rightshift */
564 2, /* size (0 = byte, 1 = short, 2 = long) */
565 16, /* bitsize */
566 FALSE, /* pc_relative */
567 1, /* bitpos */
568 complain_overflow_dont,/* complain_on_overflow */
569 score_elf_hi16_reloc, /* special_function */
570 "R_SCORE_HI16", /* name */
571 TRUE, /* partial_inplace */
572 0x37fff, /* src_mask */
573 0x37fff, /* dst_mask */
574 FALSE), /* pcrel_offset */
575
576 /* R_SCORE_LO16 */
577 HOWTO (R_SCORE_LO16, /* type */
578 0, /* rightshift */
579 2, /* size (0 = byte, 1 = short, 2 = long) */
580 16, /* bitsize */
581 FALSE, /* pc_relative */
582 1, /* bitpos */
583 complain_overflow_dont,/* complain_on_overflow */
584 score_elf_lo16_reloc, /* special_function */
585 "R_SCORE_LO16", /* name */
586 TRUE, /* partial_inplace */
587 0x37fff, /* src_mask */
588 0x37fff, /* dst_mask */
589 FALSE), /* pcrel_offset */
590
591 /* R_SCORE_BCMP */
592 HOWTO (R_SCORE_BCMP, /* type */
593 0, /* rightshift */
594 2, /* size (0 = byte, 1 = short, 2 = long) */
595 16, /* bitsize */
596 FALSE, /* pc_relative */
597 1, /* bitpos */
598 complain_overflow_dont,/* complain_on_overflow */
599 bfd_elf_generic_reloc, /* special_function */
600 "R_SCORE_BCMP", /* name */
601 TRUE, /* partial_inplace */
602 0x0000ffff, /* src_mask */
603 0x0000ffff, /* dst_mask */
604 FALSE), /* pcrel_offset */
605
606 HOWTO (R_SCORE_24, /* type */
607 1, /* rightshift */
608 2, /* size (0 = byte, 1 = short, 2 = long) */
609 24, /* bitsize */
610 FALSE, /* pc_relative */
611 1, /* bitpos */
612 complain_overflow_dont,/* complain_on_overflow */
613 bfd_elf_generic_reloc, /* special_function */
614 "R_SCORE_24", /* name */
615 FALSE, /* partial_inplace */
616 0x3ff7fff, /* src_mask */
617 0x3ff7fff, /* dst_mask */
618 FALSE), /* pcrel_offset */
619
620 /*R_SCORE_PC19 */
621 HOWTO (R_SCORE_PC19, /* type */
622 1, /* rightshift */
623 2, /* size (0 = byte, 1 = short, 2 = long) */
624 19, /* bitsize */
625 TRUE, /* pc_relative */
626 1, /* bitpos */
627 complain_overflow_dont,/* complain_on_overflow */
628 bfd_elf_generic_reloc, /* special_function */
629 "R_SCORE_PC19", /* name */
630 FALSE, /* partial_inplace */
631 0x3ff03fe, /* src_mask */
632 0x3ff03fe, /* dst_mask */
633 FALSE), /* pcrel_offset */
634
635 /*R_SCORE16_11 */
636 HOWTO (R_SCORE16_11, /* type */
637 1, /* rightshift */
638 1, /* size (0 = byte, 1 = short, 2 = long) */
639 11, /* bitsize */
640 FALSE, /* pc_relative */
641 1, /* bitpos */
642 complain_overflow_dont,/* complain_on_overflow */
643 bfd_elf_generic_reloc, /* special_function */
644 "R_SCORE16_11", /* name */
645 FALSE, /* partial_inplace */
646 0x000000ffe, /* src_mask */
647 0x000000ffe, /* dst_mask */
648 FALSE), /* pcrel_offset */
649
650 /* R_SCORE16_PC8 */
651 HOWTO (R_SCORE16_PC8, /* type */
652 1, /* rightshift */
653 1, /* size (0 = byte, 1 = short, 2 = long) */
654 8, /* bitsize */
655 TRUE, /* pc_relative */
656 0, /* bitpos */
657 complain_overflow_dont,/* complain_on_overflow */
658 bfd_elf_generic_reloc, /* special_function */
659 "R_SCORE16_PC8", /* name */
660 FALSE, /* partial_inplace */
661 0x000000ff, /* src_mask */
662 0x000000ff, /* dst_mask */
663 FALSE), /* pcrel_offset */
664
665 /* 32 bit absolute */
666 HOWTO (R_SCORE_ABS32, /* type 8 */
667 0, /* rightshift */
668 2, /* size (0 = byte, 1 = short, 2 = long) */
669 32, /* bitsize */
670 FALSE, /* pc_relative */
671 0, /* bitpos */
672 complain_overflow_bitfield, /* complain_on_overflow */
673 bfd_elf_generic_reloc, /* special_function */
674 "R_SCORE_ABS32", /* name */
675 FALSE, /* partial_inplace */
676 0xffffffff, /* src_mask */
677 0xffffffff, /* dst_mask */
678 FALSE), /* pcrel_offset */
679
680 /* 16 bit absolute */
681 HOWTO (R_SCORE_ABS16, /* type 11 */
682 0, /* rightshift */
683 1, /* size (0 = byte, 1 = short, 2 = long) */
684 16, /* bitsize */
685 FALSE, /* pc_relative */
686 0, /* bitpos */
687 complain_overflow_bitfield, /* complain_on_overflow */
688 bfd_elf_generic_reloc, /* special_function */
689 "R_SCORE_ABS16", /* name */
690 FALSE, /* partial_inplace */
691 0x0000ffff, /* src_mask */
692 0x0000ffff, /* dst_mask */
693 FALSE), /* pcrel_offset */
694
695 /* R_SCORE_DUMMY2 */
696 HOWTO (R_SCORE_DUMMY2, /* type */
697 0, /* rightshift */
698 2, /* size (0 = byte, 1 = short, 2 = long) */
699 16, /* bitsize */
700 FALSE, /* pc_relative */
701 0, /* bitpos */
702 complain_overflow_dont,/* complain_on_overflow */
703 bfd_elf_generic_reloc, /* special_function */
704 "R_SCORE_DUMMY2", /* name */
705 TRUE, /* partial_inplace */
706 0x00007fff, /* src_mask */
707 0x00007fff, /* dst_mask */
708 FALSE), /* pcrel_offset */
709
710 /* R_SCORE_GP15 */
711 HOWTO (R_SCORE_GP15, /* type */
712 0, /* rightshift */
713 2, /* size (0 = byte, 1 = short, 2 = long) */
714 16, /* bitsize */
715 FALSE, /* pc_relative */
716 0, /* bitpos */
717 complain_overflow_dont,/* complain_on_overflow */
718 score_elf_gprel15_reloc,/* special_function */
719 "R_SCORE_GP15", /* name */
720 TRUE, /* partial_inplace */
721 0x00007fff, /* src_mask */
722 0x00007fff, /* dst_mask */
723 FALSE), /* pcrel_offset */
724
725 /* GNU extension to record C++ vtable hierarchy. */
726 HOWTO (R_SCORE_GNU_VTINHERIT, /* type */
727 0, /* rightshift */
728 2, /* size (0 = byte, 1 = short, 2 = long) */
729 0, /* bitsize */
730 FALSE, /* pc_relative */
731 0, /* bitpos */
732 complain_overflow_dont,/* complain_on_overflow */
733 NULL, /* special_function */
734 "R_SCORE_GNU_VTINHERIT", /* name */
735 FALSE, /* partial_inplace */
736 0, /* src_mask */
737 0, /* dst_mask */
738 FALSE), /* pcrel_offset */
739
740 /* GNU extension to record C++ vtable member usage */
741 HOWTO (R_SCORE_GNU_VTENTRY, /* type */
742 0, /* rightshift */
743 2, /* size (0 = byte, 1 = short, 2 = long) */
744 0, /* bitsize */
745 FALSE, /* pc_relative */
746 0, /* bitpos */
747 complain_overflow_dont,/* complain_on_overflow */
748 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
749 "R_SCORE_GNU_VTENTRY", /* name */
750 FALSE, /* partial_inplace */
751 0, /* src_mask */
752 0, /* dst_mask */
753 FALSE), /* pcrel_offset */
754
755 /* Reference to global offset table. */
756 HOWTO (R_SCORE_GOT15, /* type */
757 0, /* rightshift */
758 2, /* size (0 = byte, 1 = short, 2 = long) */
759 16, /* bitsize */
760 FALSE, /* pc_relative */
761 0, /* bitpos */
762 complain_overflow_signed, /* complain_on_overflow */
763 score_elf_got15_reloc, /* special_function */
764 "R_SCORE_GOT15", /* name */
765 TRUE, /* partial_inplace */
766 0x00007fff, /* src_mask */
767 0x00007fff, /* dst_mask */
768 FALSE), /* pcrel_offset */
769
770 /* Low 16 bits of displacement in global offset table. */
771 HOWTO (R_SCORE_GOT_LO16, /* type */
772 0, /* rightshift */
773 2, /* size (0 = byte, 1 = short, 2 = long) */
774 16, /* bitsize */
775 FALSE, /* pc_relative */
776 1, /* bitpos */
777 complain_overflow_dont,/* complain_on_overflow */
778 score_elf_got_lo16_reloc, /* special_function */
779 "R_SCORE_GOT_LO16", /* name */
780 TRUE, /* partial_inplace */
781 0x37ffe, /* src_mask */
782 0x37ffe, /* dst_mask */
783 FALSE), /* pcrel_offset */
784
785 /* 15 bit call through global offset table. */
786 HOWTO (R_SCORE_CALL15, /* type */
787 0, /* rightshift */
788 2, /* size (0 = byte, 1 = short, 2 = long) */
789 16, /* bitsize */
790 FALSE, /* pc_relative */
791 0, /* bitpos */
792 complain_overflow_signed, /* complain_on_overflow */
793 bfd_elf_generic_reloc, /* special_function */
794 "R_SCORE_CALL15", /* name */
795 TRUE, /* partial_inplace */
796 0x00007fff, /* src_mask */
797 0x00007fff, /* dst_mask */
798 FALSE), /* pcrel_offset */
799
800 /* 32 bit GP relative reference. */
801 HOWTO (R_SCORE_GPREL32, /* type */
802 0, /* rightshift */
803 2, /* size (0 = byte, 1 = short, 2 = long) */
804 32, /* bitsize */
805 FALSE, /* pc_relative */
806 0, /* bitpos */
807 complain_overflow_dont,/* complain_on_overflow */
808 score_elf_gprel32_reloc, /* special_function */
809 "R_SCORE_GPREL32", /* name */
810 TRUE, /* partial_inplace */
811 0xffffffff, /* src_mask */
812 0xffffffff, /* dst_mask */
813 FALSE), /* pcrel_offset */
814
815 /* 32 bit symbol relative relocation. */
816 HOWTO (R_SCORE_REL32, /* type */
817 0, /* rightshift */
818 2, /* size (0 = byte, 1 = short, 2 = long) */
819 32, /* bitsize */
820 FALSE, /* pc_relative */
821 0, /* bitpos */
822 complain_overflow_dont,/* complain_on_overflow */
823 bfd_elf_generic_reloc, /* special_function */
824 "R_SCORE_REL32", /* name */
825 TRUE, /* partial_inplace */
826 0xffffffff, /* src_mask */
827 0xffffffff, /* dst_mask */
828 FALSE), /* pcrel_offset */
829
830 /* R_SCORE_DUMMY_HI16 */
831 HOWTO (R_SCORE_DUMMY_HI16, /* type */
832 0, /* rightshift */
833 2, /* size (0 = byte, 1 = short, 2 = long) */
834 16, /* bitsize */
835 FALSE, /* pc_relative */
836 1, /* bitpos */
837 complain_overflow_dont,/* complain_on_overflow */
838 score_elf_hi16_reloc, /* special_function */
839 "R_SCORE_DUMMY_HI16", /* name */
840 TRUE, /* partial_inplace */
841 0x37fff, /* src_mask */
842 0x37fff, /* dst_mask */
843 FALSE), /* pcrel_offset */
844 };
845
846 struct score_reloc_map
847 {
848 bfd_reloc_code_real_type bfd_reloc_val;
849 unsigned char elf_reloc_val;
850 };
851
852 static const struct score_reloc_map elf32_score_reloc_map[] =
853 {
854 {BFD_RELOC_NONE, R_SCORE_NONE},
855 {BFD_RELOC_HI16_S, R_SCORE_HI16},
856 {BFD_RELOC_LO16, R_SCORE_LO16},
857 {BFD_RELOC_SCORE_BCMP, R_SCORE_BCMP},
858 {BFD_RELOC_SCORE_JMP, R_SCORE_24},
859 {BFD_RELOC_SCORE_BRANCH, R_SCORE_PC19},
860 {BFD_RELOC_SCORE16_JMP, R_SCORE16_11},
861 {BFD_RELOC_SCORE16_BRANCH, R_SCORE16_PC8},
862 {BFD_RELOC_32, R_SCORE_ABS32},
863 {BFD_RELOC_16, R_SCORE_ABS16},
864 {BFD_RELOC_SCORE_DUMMY2, R_SCORE_DUMMY2},
865 {BFD_RELOC_SCORE_GPREL15, R_SCORE_GP15},
866 {BFD_RELOC_VTABLE_INHERIT, R_SCORE_GNU_VTINHERIT},
867 {BFD_RELOC_VTABLE_ENTRY, R_SCORE_GNU_VTENTRY},
868 {BFD_RELOC_SCORE_GOT15, R_SCORE_GOT15},
869 {BFD_RELOC_SCORE_GOT_LO16, R_SCORE_GOT_LO16},
870 {BFD_RELOC_SCORE_CALL15, R_SCORE_CALL15},
871 {BFD_RELOC_GPREL32, R_SCORE_GPREL32},
872 {BFD_RELOC_32_PCREL, R_SCORE_REL32},
873 {BFD_RELOC_SCORE_DUMMY_HI16, R_SCORE_DUMMY_HI16},
874 };
875
876 static INLINE hashval_t
score_elf_hash_bfd_vma(bfd_vma addr)877 score_elf_hash_bfd_vma (bfd_vma addr)
878 {
879 #ifdef BFD64
880 return addr + (addr >> 32);
881 #else
882 return addr;
883 #endif
884 }
885
886 /* got_entries only match if they're identical, except for gotidx, so
887 use all fields to compute the hash, and compare the appropriate
888 union members. */
889
890 static hashval_t
score_elf_got_entry_hash(const void * entry_)891 score_elf_got_entry_hash (const void *entry_)
892 {
893 const struct score_got_entry *entry = (struct score_got_entry *) entry_;
894
895 return entry->symndx
896 + (! entry->abfd ? score_elf_hash_bfd_vma (entry->d.address)
897 : entry->abfd->id
898 + (entry->symndx >= 0 ? score_elf_hash_bfd_vma (entry->d.addend)
899 : entry->d.h->root.root.root.hash));
900 }
901
902 static int
score_elf_got_entry_eq(const void * entry1,const void * entry2)903 score_elf_got_entry_eq (const void *entry1, const void *entry2)
904 {
905 const struct score_got_entry *e1 = (struct score_got_entry *) entry1;
906 const struct score_got_entry *e2 = (struct score_got_entry *) entry2;
907
908 return e1->abfd == e2->abfd && e1->symndx == e2->symndx
909 && (! e1->abfd ? e1->d.address == e2->d.address
910 : e1->symndx >= 0 ? e1->d.addend == e2->d.addend
911 : e1->d.h == e2->d.h);
912 }
913
914 /* If H needs a GOT entry, assign it the highest available dynamic
915 index. Otherwise, assign it the lowest available dynamic
916 index. */
917
918 static bfd_boolean
score_elf_sort_hash_table_f(struct score_elf_link_hash_entry * h,void * data)919 score_elf_sort_hash_table_f (struct score_elf_link_hash_entry *h, void *data)
920 {
921 struct score_elf_hash_sort_data *hsd = data;
922
923 /* Symbols without dynamic symbol table entries aren't interesting at all. */
924 if (h->root.dynindx == -1)
925 return TRUE;
926
927 /* Global symbols that need GOT entries that are not explicitly
928 referenced are marked with got offset 2. Those that are
929 referenced get a 1, and those that don't need GOT entries get
930 -1. */
931 if (h->root.got.offset == 2)
932 {
933 if (hsd->max_unref_got_dynindx == hsd->min_got_dynindx)
934 hsd->low = (struct elf_link_hash_entry *) h;
935 h->root.dynindx = hsd->max_unref_got_dynindx++;
936 }
937 else if (h->root.got.offset != 1)
938 h->root.dynindx = hsd->max_non_got_dynindx++;
939 else
940 {
941 h->root.dynindx = --hsd->min_got_dynindx;
942 hsd->low = (struct elf_link_hash_entry *) h;
943 }
944
945 return TRUE;
946 }
947
948 static asection *
score_elf_got_section(bfd * abfd,bfd_boolean maybe_excluded)949 score_elf_got_section (bfd *abfd, bfd_boolean maybe_excluded)
950 {
951 asection *sgot = bfd_get_linker_section (abfd, ".got");
952
953 if (sgot == NULL || (! maybe_excluded && (sgot->flags & SEC_EXCLUDE) != 0))
954 return NULL;
955 return sgot;
956 }
957
958 /* Returns the GOT information associated with the link indicated by
959 INFO. If SGOTP is non-NULL, it is filled in with the GOT section. */
960
961 static struct score_got_info *
score_elf_got_info(bfd * abfd,asection ** sgotp)962 score_elf_got_info (bfd *abfd, asection **sgotp)
963 {
964 asection *sgot;
965 struct score_got_info *g;
966
967 sgot = score_elf_got_section (abfd, TRUE);
968 BFD_ASSERT (sgot != NULL);
969 BFD_ASSERT (elf_section_data (sgot) != NULL);
970 g = score_elf_section_data (sgot)->u.got_info;
971 BFD_ASSERT (g != NULL);
972
973 if (sgotp)
974 *sgotp = sgot;
975 return g;
976 }
977
978 /* Sort the dynamic symbol table so that symbols that need GOT entries
979 appear towards the end. This reduces the amount of GOT space
980 required. MAX_LOCAL is used to set the number of local symbols
981 known to be in the dynamic symbol table. During
982 s7_bfd_score_elf_size_dynamic_sections, this value is 1. Afterward, the
983 section symbols are added and the count is higher. */
984
985 static bfd_boolean
score_elf_sort_hash_table(struct bfd_link_info * info,unsigned long max_local)986 score_elf_sort_hash_table (struct bfd_link_info *info,
987 unsigned long max_local)
988 {
989 struct score_elf_hash_sort_data hsd;
990 struct score_got_info *g;
991 bfd *dynobj;
992
993 dynobj = elf_hash_table (info)->dynobj;
994
995 g = score_elf_got_info (dynobj, NULL);
996
997 hsd.low = NULL;
998 hsd.max_unref_got_dynindx =
999 hsd.min_got_dynindx = elf_hash_table (info)->dynsymcount
1000 /* In the multi-got case, assigned_gotno of the master got_info
1001 indicate the number of entries that aren't referenced in the
1002 primary GOT, but that must have entries because there are
1003 dynamic relocations that reference it. Since they aren't
1004 referenced, we move them to the end of the GOT, so that they
1005 don't prevent other entries that are referenced from getting
1006 too large offsets. */
1007 - (g->next ? g->assigned_gotno : 0);
1008 hsd.max_non_got_dynindx = max_local;
1009 score_elf_link_hash_traverse (elf_hash_table (info),
1010 score_elf_sort_hash_table_f,
1011 &hsd);
1012
1013 /* There should have been enough room in the symbol table to
1014 accommodate both the GOT and non-GOT symbols. */
1015 BFD_ASSERT (hsd.max_non_got_dynindx <= hsd.min_got_dynindx);
1016 BFD_ASSERT ((unsigned long) hsd.max_unref_got_dynindx
1017 <= elf_hash_table (info)->dynsymcount);
1018
1019 /* Now we know which dynamic symbol has the lowest dynamic symbol
1020 table index in the GOT. */
1021 g->global_gotsym = hsd.low;
1022
1023 return TRUE;
1024 }
1025
1026 /* Returns the first relocation of type r_type found, beginning with
1027 RELOCATION. RELEND is one-past-the-end of the relocation table. */
1028
1029 static const Elf_Internal_Rela *
score_elf_next_relocation(bfd * abfd ATTRIBUTE_UNUSED,unsigned int r_type,const Elf_Internal_Rela * relocation,const Elf_Internal_Rela * relend)1030 score_elf_next_relocation (bfd *abfd ATTRIBUTE_UNUSED, unsigned int r_type,
1031 const Elf_Internal_Rela *relocation,
1032 const Elf_Internal_Rela *relend)
1033 {
1034 while (relocation < relend)
1035 {
1036 if (ELF32_R_TYPE (relocation->r_info) == r_type)
1037 return relocation;
1038
1039 ++relocation;
1040 }
1041
1042 /* We didn't find it. */
1043 bfd_set_error (bfd_error_bad_value);
1044 return NULL;
1045 }
1046
1047 /* This function is called via qsort() to sort the dynamic relocation
1048 entries by increasing r_symndx value. */
1049 static int
score_elf_sort_dynamic_relocs(const void * arg1,const void * arg2)1050 score_elf_sort_dynamic_relocs (const void *arg1, const void *arg2)
1051 {
1052 Elf_Internal_Rela int_reloc1;
1053 Elf_Internal_Rela int_reloc2;
1054
1055 bfd_elf32_swap_reloc_in (reldyn_sorting_bfd, arg1, &int_reloc1);
1056 bfd_elf32_swap_reloc_in (reldyn_sorting_bfd, arg2, &int_reloc2);
1057
1058 return (ELF32_R_SYM (int_reloc1.r_info) - ELF32_R_SYM (int_reloc2.r_info));
1059 }
1060
1061 /* Return whether a relocation is against a local symbol. */
1062 static bfd_boolean
score_elf_local_relocation_p(bfd * input_bfd,const Elf_Internal_Rela * relocation,asection ** local_sections,bfd_boolean check_forced)1063 score_elf_local_relocation_p (bfd *input_bfd,
1064 const Elf_Internal_Rela *relocation,
1065 asection **local_sections,
1066 bfd_boolean check_forced)
1067 {
1068 unsigned long r_symndx;
1069 Elf_Internal_Shdr *symtab_hdr;
1070 struct score_elf_link_hash_entry *h;
1071 size_t extsymoff;
1072
1073 r_symndx = ELF32_R_SYM (relocation->r_info);
1074 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1075 extsymoff = (elf_bad_symtab (input_bfd)) ? 0 : symtab_hdr->sh_info;
1076
1077 if (r_symndx < extsymoff)
1078 return TRUE;
1079 if (elf_bad_symtab (input_bfd) && local_sections[r_symndx] != NULL)
1080 return TRUE;
1081
1082 if (check_forced)
1083 {
1084 /* Look up the hash table to check whether the symbol was forced local. */
1085 h = (struct score_elf_link_hash_entry *)
1086 elf_sym_hashes (input_bfd) [r_symndx - extsymoff];
1087 /* Find the real hash-table entry for this symbol. */
1088 while (h->root.root.type == bfd_link_hash_indirect
1089 || h->root.root.type == bfd_link_hash_warning)
1090 h = (struct score_elf_link_hash_entry *) h->root.root.u.i.link;
1091 if (h->root.forced_local)
1092 return TRUE;
1093 }
1094
1095 return FALSE;
1096 }
1097
1098 /* Returns the dynamic relocation section for DYNOBJ. */
1099
1100 static asection *
score_elf_rel_dyn_section(bfd * dynobj,bfd_boolean create_p)1101 score_elf_rel_dyn_section (bfd *dynobj, bfd_boolean create_p)
1102 {
1103 static const char dname[] = ".rel.dyn";
1104 asection *sreloc;
1105
1106 sreloc = bfd_get_linker_section (dynobj, dname);
1107 if (sreloc == NULL && create_p)
1108 {
1109 sreloc = bfd_make_section_anyway_with_flags (dynobj, dname,
1110 (SEC_ALLOC
1111 | SEC_LOAD
1112 | SEC_HAS_CONTENTS
1113 | SEC_IN_MEMORY
1114 | SEC_LINKER_CREATED
1115 | SEC_READONLY));
1116 if (sreloc == NULL
1117 || !bfd_set_section_alignment (sreloc,
1118 SCORE_ELF_LOG_FILE_ALIGN (dynobj)))
1119 return NULL;
1120 }
1121 return sreloc;
1122 }
1123
1124 static void
score_elf_allocate_dynamic_relocations(bfd * abfd,unsigned int n)1125 score_elf_allocate_dynamic_relocations (bfd *abfd, unsigned int n)
1126 {
1127 asection *s;
1128
1129 s = score_elf_rel_dyn_section (abfd, FALSE);
1130 BFD_ASSERT (s != NULL);
1131
1132 if (s->size == 0)
1133 {
1134 /* Make room for a null element. */
1135 s->size += SCORE_ELF_REL_SIZE (abfd);
1136 ++s->reloc_count;
1137 }
1138 s->size += n * SCORE_ELF_REL_SIZE (abfd);
1139 }
1140
1141 /* Create a rel.dyn relocation for the dynamic linker to resolve. REL
1142 is the original relocation, which is now being transformed into a
1143 dynamic relocation. The ADDENDP is adjusted if necessary; the
1144 caller should store the result in place of the original addend. */
1145
1146 static bfd_boolean
score_elf_create_dynamic_relocation(bfd * output_bfd,struct bfd_link_info * info,const Elf_Internal_Rela * rel,struct score_elf_link_hash_entry * h,bfd_vma symbol,bfd_vma * addendp,asection * input_section)1147 score_elf_create_dynamic_relocation (bfd *output_bfd,
1148 struct bfd_link_info *info,
1149 const Elf_Internal_Rela *rel,
1150 struct score_elf_link_hash_entry *h,
1151 bfd_vma symbol,
1152 bfd_vma *addendp, asection *input_section)
1153 {
1154 Elf_Internal_Rela outrel[3];
1155 asection *sreloc;
1156 bfd *dynobj;
1157 int r_type;
1158 long indx;
1159 bfd_boolean defined_p;
1160
1161 r_type = ELF32_R_TYPE (rel->r_info);
1162 dynobj = elf_hash_table (info)->dynobj;
1163 sreloc = score_elf_rel_dyn_section (dynobj, FALSE);
1164 BFD_ASSERT (sreloc != NULL);
1165 BFD_ASSERT (sreloc->contents != NULL);
1166 BFD_ASSERT (sreloc->reloc_count * SCORE_ELF_REL_SIZE (output_bfd) < sreloc->size);
1167
1168 outrel[0].r_offset =
1169 _bfd_elf_section_offset (output_bfd, info, input_section, rel[0].r_offset);
1170 outrel[1].r_offset =
1171 _bfd_elf_section_offset (output_bfd, info, input_section, rel[1].r_offset);
1172 outrel[2].r_offset =
1173 _bfd_elf_section_offset (output_bfd, info, input_section, rel[2].r_offset);
1174
1175 if (outrel[0].r_offset == MINUS_ONE)
1176 /* The relocation field has been deleted. */
1177 return TRUE;
1178
1179 if (outrel[0].r_offset == MINUS_TWO)
1180 {
1181 /* The relocation field has been converted into a relative value of
1182 some sort. Functions like _bfd_elf_write_section_eh_frame expect
1183 the field to be fully relocated, so add in the symbol's value. */
1184 *addendp += symbol;
1185 return TRUE;
1186 }
1187
1188 /* We must now calculate the dynamic symbol table index to use
1189 in the relocation. */
1190 if (h != NULL
1191 && (! info->symbolic || !h->root.def_regular)
1192 /* h->root.dynindx may be -1 if this symbol was marked to
1193 become local. */
1194 && h->root.dynindx != -1)
1195 {
1196 indx = h->root.dynindx;
1197 /* ??? glibc's ld.so just adds the final GOT entry to the
1198 relocation field. It therefore treats relocs against
1199 defined symbols in the same way as relocs against
1200 undefined symbols. */
1201 defined_p = FALSE;
1202 }
1203 else
1204 {
1205 indx = 0;
1206 defined_p = TRUE;
1207 }
1208
1209 /* If the relocation was previously an absolute relocation and
1210 this symbol will not be referred to by the relocation, we must
1211 adjust it by the value we give it in the dynamic symbol table.
1212 Otherwise leave the job up to the dynamic linker. */
1213 if (defined_p && r_type != R_SCORE_REL32)
1214 *addendp += symbol;
1215
1216 /* The relocation is always an REL32 relocation because we don't
1217 know where the shared library will wind up at load-time. */
1218 outrel[0].r_info = ELF32_R_INFO ((unsigned long) indx, R_SCORE_REL32);
1219
1220 /* For strict adherence to the ABI specification, we should
1221 generate a R_SCORE_64 relocation record by itself before the
1222 _REL32/_64 record as well, such that the addend is read in as
1223 a 64-bit value (REL32 is a 32-bit relocation, after all).
1224 However, since none of the existing ELF64 SCORE dynamic
1225 loaders seems to care, we don't waste space with these
1226 artificial relocations. If this turns out to not be true,
1227 score_elf_allocate_dynamic_relocations() should be tweaked so
1228 as to make room for a pair of dynamic relocations per
1229 invocation if ABI_64_P, and here we should generate an
1230 additional relocation record with R_SCORE_64 by itself for a
1231 NULL symbol before this relocation record. */
1232 outrel[1].r_info = ELF32_R_INFO (0, R_SCORE_NONE);
1233 outrel[2].r_info = ELF32_R_INFO (0, R_SCORE_NONE);
1234
1235 /* Adjust the output offset of the relocation to reference the
1236 correct location in the output file. */
1237 outrel[0].r_offset += (input_section->output_section->vma
1238 + input_section->output_offset);
1239 outrel[1].r_offset += (input_section->output_section->vma
1240 + input_section->output_offset);
1241 outrel[2].r_offset += (input_section->output_section->vma
1242 + input_section->output_offset);
1243
1244 /* Put the relocation back out. We have to use the special
1245 relocation outputter in the 64-bit case since the 64-bit
1246 relocation format is non-standard. */
1247 bfd_elf32_swap_reloc_out
1248 (output_bfd, &outrel[0],
1249 (sreloc->contents + sreloc->reloc_count * sizeof (Elf32_External_Rel)));
1250
1251 /* We've now added another relocation. */
1252 ++sreloc->reloc_count;
1253
1254 /* Make sure the output section is writable. The dynamic linker
1255 will be writing to it. */
1256 elf_section_data (input_section->output_section)->this_hdr.sh_flags |= SHF_WRITE;
1257
1258 return TRUE;
1259 }
1260
1261 static bfd_boolean
score_elf_create_got_section(bfd * abfd,struct bfd_link_info * info,bfd_boolean maybe_exclude)1262 score_elf_create_got_section (bfd *abfd,
1263 struct bfd_link_info *info,
1264 bfd_boolean maybe_exclude)
1265 {
1266 flagword flags;
1267 asection *s;
1268 struct elf_link_hash_entry *h;
1269 struct bfd_link_hash_entry *bh;
1270 struct score_got_info *g;
1271 size_t amt;
1272
1273 /* This function may be called more than once. */
1274 s = score_elf_got_section (abfd, TRUE);
1275 if (s)
1276 {
1277 if (! maybe_exclude)
1278 s->flags &= ~SEC_EXCLUDE;
1279 return TRUE;
1280 }
1281
1282 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
1283
1284 if (maybe_exclude)
1285 flags |= SEC_EXCLUDE;
1286
1287 /* We have to use an alignment of 2**4 here because this is hardcoded
1288 in the function stub generation and in the linker script. */
1289 s = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
1290 elf_hash_table (info)->sgot = s;
1291 if (s == NULL
1292 || !bfd_set_section_alignment (s, 4))
1293 return FALSE;
1294
1295 /* Define the symbol _GLOBAL_OFFSET_TABLE_. We don't do this in the
1296 linker script because we don't want to define the symbol if we
1297 are not creating a global offset table. */
1298 bh = NULL;
1299 if (! (_bfd_generic_link_add_one_symbol
1300 (info, abfd, "_GLOBAL_OFFSET_TABLE_", BSF_GLOBAL, s,
1301 0, NULL, FALSE, get_elf_backend_data (abfd)->collect, &bh)))
1302 return FALSE;
1303
1304 h = (struct elf_link_hash_entry *) bh;
1305 h->non_elf = 0;
1306 h->def_regular = 1;
1307 h->type = STT_OBJECT;
1308 elf_hash_table (info)->hgot = h;
1309
1310 if (bfd_link_pic (info)
1311 && ! bfd_elf_link_record_dynamic_symbol (info, h))
1312 return FALSE;
1313
1314 amt = sizeof (struct score_got_info);
1315 g = bfd_alloc (abfd, amt);
1316 if (g == NULL)
1317 return FALSE;
1318
1319 g->global_gotsym = NULL;
1320 g->global_gotno = 0;
1321
1322 g->local_gotno = SCORE_RESERVED_GOTNO;
1323 g->assigned_gotno = SCORE_RESERVED_GOTNO;
1324 g->next = NULL;
1325
1326 g->got_entries = htab_try_create (1, score_elf_got_entry_hash,
1327 score_elf_got_entry_eq, NULL);
1328 if (g->got_entries == NULL)
1329 return FALSE;
1330 score_elf_section_data (s)->u.got_info = g;
1331 score_elf_section_data (s)->elf.this_hdr.sh_flags |= SHF_ALLOC | SHF_WRITE | SHF_SCORE_GPREL;
1332
1333 return TRUE;
1334 }
1335
1336 /* Calculate the %high function. */
1337
1338 static bfd_vma
score_elf_high(bfd_vma value)1339 score_elf_high (bfd_vma value)
1340 {
1341 return ((value + (bfd_vma) 0x8000) >> 16) & 0xffff;
1342 }
1343
1344 /* Create a local GOT entry for VALUE. Return the index of the entry,
1345 or -1 if it could not be created. */
1346
1347 static struct score_got_entry *
score_elf_create_local_got_entry(bfd * abfd,bfd * ibfd ATTRIBUTE_UNUSED,struct score_got_info * gg,asection * sgot,bfd_vma value,unsigned long r_symndx ATTRIBUTE_UNUSED,struct score_elf_link_hash_entry * h ATTRIBUTE_UNUSED,int r_type ATTRIBUTE_UNUSED)1348 score_elf_create_local_got_entry (bfd *abfd,
1349 bfd *ibfd ATTRIBUTE_UNUSED,
1350 struct score_got_info *gg,
1351 asection *sgot, bfd_vma value,
1352 unsigned long r_symndx ATTRIBUTE_UNUSED,
1353 struct score_elf_link_hash_entry *h ATTRIBUTE_UNUSED,
1354 int r_type ATTRIBUTE_UNUSED)
1355 {
1356 struct score_got_entry entry, **loc;
1357 struct score_got_info *g;
1358
1359 entry.abfd = NULL;
1360 entry.symndx = -1;
1361 entry.d.address = value;
1362
1363 g = gg;
1364 loc = (struct score_got_entry **) htab_find_slot (g->got_entries, &entry, INSERT);
1365 if (*loc)
1366 return *loc;
1367
1368 entry.gotidx = SCORE_ELF_GOT_SIZE (abfd) * g->assigned_gotno++;
1369
1370 *loc = bfd_alloc (abfd, sizeof entry);
1371
1372 if (! *loc)
1373 return NULL;
1374
1375 memcpy (*loc, &entry, sizeof entry);
1376
1377 if (g->assigned_gotno >= g->local_gotno)
1378 {
1379 (*loc)->gotidx = -1;
1380 /* We didn't allocate enough space in the GOT. */
1381 _bfd_error_handler
1382 (_("not enough GOT space for local GOT entries"));
1383 bfd_set_error (bfd_error_bad_value);
1384 return NULL;
1385 }
1386
1387 bfd_put_32 (abfd, value, (sgot->contents + entry.gotidx));
1388
1389 return *loc;
1390 }
1391
1392 /* Find a GOT entry whose higher-order 16 bits are the same as those
1393 for value. Return the index into the GOT for this entry. */
1394
1395 static bfd_vma
score_elf_got16_entry(bfd * abfd,bfd * ibfd,struct bfd_link_info * info,bfd_vma value,bfd_boolean external)1396 score_elf_got16_entry (bfd *abfd, bfd *ibfd, struct bfd_link_info *info,
1397 bfd_vma value, bfd_boolean external)
1398 {
1399 asection *sgot;
1400 struct score_got_info *g;
1401 struct score_got_entry *entry;
1402
1403 if (!external)
1404 {
1405 /* Although the ABI says that it is "the high-order 16 bits" that we
1406 want, it is really the %high value. The complete value is
1407 calculated with a `addiu' of a LO16 relocation, just as with a
1408 HI16/LO16 pair. */
1409 value = score_elf_high (value) << 16;
1410 }
1411
1412 g = score_elf_got_info (elf_hash_table (info)->dynobj, &sgot);
1413
1414 entry = score_elf_create_local_got_entry (abfd, ibfd, g, sgot, value, 0, NULL,
1415 R_SCORE_GOT15);
1416 if (entry)
1417 return entry->gotidx;
1418 else
1419 return MINUS_ONE;
1420 }
1421
1422 void
s7_bfd_score_elf_hide_symbol(struct bfd_link_info * info,struct elf_link_hash_entry * entry,bfd_boolean force_local)1423 s7_bfd_score_elf_hide_symbol (struct bfd_link_info *info,
1424 struct elf_link_hash_entry *entry,
1425 bfd_boolean force_local)
1426 {
1427 bfd *dynobj;
1428 asection *got;
1429 struct score_got_info *g;
1430 struct score_elf_link_hash_entry *h;
1431
1432 h = (struct score_elf_link_hash_entry *) entry;
1433 if (h->forced_local)
1434 return;
1435 h->forced_local = TRUE;
1436
1437 dynobj = elf_hash_table (info)->dynobj;
1438 if (dynobj != NULL && force_local)
1439 {
1440 got = score_elf_got_section (dynobj, FALSE);
1441 if (got == NULL)
1442 return;
1443 g = score_elf_section_data (got)->u.got_info;
1444
1445 if (g->next)
1446 {
1447 struct score_got_entry e;
1448 struct score_got_info *gg = g;
1449
1450 /* Since we're turning what used to be a global symbol into a
1451 local one, bump up the number of local entries of each GOT
1452 that had an entry for it. This will automatically decrease
1453 the number of global entries, since global_gotno is actually
1454 the upper limit of global entries. */
1455 e.abfd = dynobj;
1456 e.symndx = -1;
1457 e.d.h = h;
1458
1459 for (g = g->next; g != gg; g = g->next)
1460 if (htab_find (g->got_entries, &e))
1461 {
1462 BFD_ASSERT (g->global_gotno > 0);
1463 g->local_gotno++;
1464 g->global_gotno--;
1465 }
1466
1467 /* If this was a global symbol forced into the primary GOT, we
1468 no longer need an entry for it. We can't release the entry
1469 at this point, but we must at least stop counting it as one
1470 of the symbols that required a forced got entry. */
1471 if (h->root.got.offset == 2)
1472 {
1473 BFD_ASSERT (gg->assigned_gotno > 0);
1474 gg->assigned_gotno--;
1475 }
1476 }
1477 else if (g->global_gotno == 0 && g->global_gotsym == NULL)
1478 /* If we haven't got through GOT allocation yet, just bump up the
1479 number of local entries, as this symbol won't be counted as
1480 global. */
1481 g->local_gotno++;
1482 else if (h->root.got.offset == 1)
1483 {
1484 /* If we're past non-multi-GOT allocation and this symbol had
1485 been marked for a global got entry, give it a local entry
1486 instead. */
1487 BFD_ASSERT (g->global_gotno > 0);
1488 g->local_gotno++;
1489 g->global_gotno--;
1490 }
1491 }
1492
1493 _bfd_elf_link_hash_hide_symbol (info, &h->root, force_local);
1494 }
1495
1496 /* If H is a symbol that needs a global GOT entry, but has a dynamic
1497 symbol table index lower than any we've seen to date, record it for
1498 posterity. */
1499
1500 static bfd_boolean
score_elf_record_global_got_symbol(struct elf_link_hash_entry * h,bfd * abfd,struct bfd_link_info * info,struct score_got_info * g)1501 score_elf_record_global_got_symbol (struct elf_link_hash_entry *h,
1502 bfd *abfd,
1503 struct bfd_link_info *info,
1504 struct score_got_info *g)
1505 {
1506 struct score_got_entry entry, **loc;
1507
1508 /* A global symbol in the GOT must also be in the dynamic symbol table. */
1509 if (h->dynindx == -1)
1510 {
1511 switch (ELF_ST_VISIBILITY (h->other))
1512 {
1513 case STV_INTERNAL:
1514 case STV_HIDDEN:
1515 s7_bfd_score_elf_hide_symbol (info, h, TRUE);
1516 break;
1517 }
1518 if (!bfd_elf_link_record_dynamic_symbol (info, h))
1519 return FALSE;
1520 }
1521
1522 entry.abfd = abfd;
1523 entry.symndx = -1;
1524 entry.d.h = (struct score_elf_link_hash_entry *) h;
1525
1526 loc = (struct score_got_entry **) htab_find_slot (g->got_entries, &entry, INSERT);
1527
1528 /* If we've already marked this entry as needing GOT space, we don't
1529 need to do it again. */
1530 if (*loc)
1531 return TRUE;
1532
1533 *loc = bfd_alloc (abfd, sizeof entry);
1534 if (! *loc)
1535 return FALSE;
1536
1537 entry.gotidx = -1;
1538
1539 memcpy (*loc, &entry, sizeof (entry));
1540
1541 if (h->got.offset != MINUS_ONE)
1542 return TRUE;
1543
1544 /* By setting this to a value other than -1, we are indicating that
1545 there needs to be a GOT entry for H. Avoid using zero, as the
1546 generic ELF copy_indirect_symbol tests for <= 0. */
1547 h->got.offset = 1;
1548
1549 return TRUE;
1550 }
1551
1552 /* Reserve space in G for a GOT entry containing the value of symbol
1553 SYMNDX in input bfd ABDF, plus ADDEND. */
1554
1555 static bfd_boolean
score_elf_record_local_got_symbol(bfd * abfd,long symndx,bfd_vma addend,struct score_got_info * g)1556 score_elf_record_local_got_symbol (bfd *abfd,
1557 long symndx,
1558 bfd_vma addend,
1559 struct score_got_info *g)
1560 {
1561 struct score_got_entry entry, **loc;
1562
1563 entry.abfd = abfd;
1564 entry.symndx = symndx;
1565 entry.d.addend = addend;
1566 loc = (struct score_got_entry **) htab_find_slot (g->got_entries, &entry, INSERT);
1567
1568 if (*loc)
1569 return TRUE;
1570
1571 entry.gotidx = g->local_gotno++;
1572
1573 *loc = bfd_alloc (abfd, sizeof(entry));
1574 if (! *loc)
1575 return FALSE;
1576
1577 memcpy (*loc, &entry, sizeof (entry));
1578
1579 return TRUE;
1580 }
1581
1582 /* Returns the GOT offset at which the indicated address can be found.
1583 If there is not yet a GOT entry for this value, create one.
1584 Returns -1 if no satisfactory GOT offset can be found. */
1585
1586 static bfd_vma
score_elf_local_got_index(bfd * abfd,bfd * ibfd,struct bfd_link_info * info,bfd_vma value,unsigned long r_symndx,struct score_elf_link_hash_entry * h,int r_type)1587 score_elf_local_got_index (bfd *abfd, bfd *ibfd, struct bfd_link_info *info,
1588 bfd_vma value, unsigned long r_symndx,
1589 struct score_elf_link_hash_entry *h, int r_type)
1590 {
1591 asection *sgot;
1592 struct score_got_info *g;
1593 struct score_got_entry *entry;
1594
1595 g = score_elf_got_info (elf_hash_table (info)->dynobj, &sgot);
1596
1597 entry = score_elf_create_local_got_entry (abfd, ibfd, g, sgot, value,
1598 r_symndx, h, r_type);
1599 if (!entry)
1600 return MINUS_ONE;
1601
1602 else
1603 return entry->gotidx;
1604 }
1605
1606 /* Returns the GOT index for the global symbol indicated by H. */
1607
1608 static bfd_vma
score_elf_global_got_index(bfd * abfd,struct elf_link_hash_entry * h)1609 score_elf_global_got_index (bfd *abfd, struct elf_link_hash_entry *h)
1610 {
1611 bfd_vma got_index;
1612 asection *sgot;
1613 struct score_got_info *g;
1614 long global_got_dynindx = 0;
1615
1616 g = score_elf_got_info (abfd, &sgot);
1617 if (g->global_gotsym != NULL)
1618 global_got_dynindx = g->global_gotsym->dynindx;
1619
1620 /* Once we determine the global GOT entry with the lowest dynamic
1621 symbol table index, we must put all dynamic symbols with greater
1622 indices into the GOT. That makes it easy to calculate the GOT
1623 offset. */
1624 BFD_ASSERT (h->dynindx >= global_got_dynindx);
1625 got_index = ((h->dynindx - global_got_dynindx + g->local_gotno) * SCORE_ELF_GOT_SIZE (abfd));
1626 BFD_ASSERT (got_index < sgot->size);
1627
1628 return got_index;
1629 }
1630
1631 /* Returns the offset for the entry at the INDEXth position in the GOT. */
1632
1633 static bfd_vma
score_elf_got_offset_from_index(bfd * dynobj,bfd * output_bfd,bfd * input_bfd ATTRIBUTE_UNUSED,bfd_vma got_index)1634 score_elf_got_offset_from_index (bfd *dynobj,
1635 bfd *output_bfd,
1636 bfd *input_bfd ATTRIBUTE_UNUSED,
1637 bfd_vma got_index)
1638 {
1639 asection *sgot;
1640 bfd_vma gp;
1641
1642 score_elf_got_info (dynobj, &sgot);
1643 gp = _bfd_get_gp_value (output_bfd);
1644
1645 return sgot->output_section->vma + sgot->output_offset + got_index - gp;
1646 }
1647
1648 /* Follow indirect and warning hash entries so that each got entry
1649 points to the final symbol definition. P must point to a pointer
1650 to the hash table we're traversing. Since this traversal may
1651 modify the hash table, we set this pointer to NULL to indicate
1652 we've made a potentially-destructive change to the hash table, so
1653 the traversal must be restarted. */
1654
1655 static int
score_elf_resolve_final_got_entry(void ** entryp,void * p)1656 score_elf_resolve_final_got_entry (void **entryp, void *p)
1657 {
1658 struct score_got_entry *entry = (struct score_got_entry *) *entryp;
1659 htab_t got_entries = *(htab_t *) p;
1660
1661 if (entry->abfd != NULL && entry->symndx == -1)
1662 {
1663 struct score_elf_link_hash_entry *h = entry->d.h;
1664
1665 while (h->root.root.type == bfd_link_hash_indirect
1666 || h->root.root.type == bfd_link_hash_warning)
1667 h = (struct score_elf_link_hash_entry *) h->root.root.u.i.link;
1668
1669 if (entry->d.h == h)
1670 return 1;
1671
1672 entry->d.h = h;
1673
1674 /* If we can't find this entry with the new bfd hash, re-insert
1675 it, and get the traversal restarted. */
1676 if (! htab_find (got_entries, entry))
1677 {
1678 htab_clear_slot (got_entries, entryp);
1679 entryp = htab_find_slot (got_entries, entry, INSERT);
1680 if (! *entryp)
1681 *entryp = entry;
1682 /* Abort the traversal, since the whole table may have
1683 moved, and leave it up to the parent to restart the
1684 process. */
1685 *(htab_t *) p = NULL;
1686 return 0;
1687 }
1688 /* We might want to decrement the global_gotno count, but it's
1689 either too early or too late for that at this point. */
1690 }
1691
1692 return 1;
1693 }
1694
1695 /* Turn indirect got entries in a got_entries table into their final locations. */
1696
1697 static void
score_elf_resolve_final_got_entries(struct score_got_info * g)1698 score_elf_resolve_final_got_entries (struct score_got_info *g)
1699 {
1700 htab_t got_entries;
1701
1702 do
1703 {
1704 got_entries = g->got_entries;
1705
1706 htab_traverse (got_entries,
1707 score_elf_resolve_final_got_entry,
1708 &got_entries);
1709 }
1710 while (got_entries == NULL);
1711 }
1712
1713 /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. for -r */
1714
1715 static void
score_elf_add_to_rel(bfd * abfd,bfd_byte * address,reloc_howto_type * howto,bfd_signed_vma increment)1716 score_elf_add_to_rel (bfd *abfd,
1717 bfd_byte *address,
1718 reloc_howto_type *howto,
1719 bfd_signed_vma increment)
1720 {
1721 bfd_signed_vma addend;
1722 bfd_vma contents;
1723 unsigned long offset;
1724 unsigned long r_type = howto->type;
1725 unsigned long hi16_addend, hi16_offset, hi16_value, uvalue;
1726
1727 contents = bfd_get_32 (abfd, address);
1728 /* Get the (signed) value from the instruction. */
1729 addend = contents & howto->src_mask;
1730 if (addend & ((howto->src_mask + 1) >> 1))
1731 {
1732 bfd_signed_vma mask;
1733
1734 mask = -1;
1735 mask &= ~howto->src_mask;
1736 addend |= mask;
1737 }
1738 /* Add in the increment, (which is a byte value). */
1739 switch (r_type)
1740 {
1741 case R_SCORE_PC19:
1742 offset =
1743 (((contents & howto->src_mask) & 0x3ff0000) >> 6) | ((contents & howto->src_mask) & 0x3ff);
1744 offset += increment;
1745 contents =
1746 (contents & ~howto->
1747 src_mask) | (((offset << 6) & howto->src_mask) & 0x3ff0000) | (offset & 0x3ff);
1748 bfd_put_32 (abfd, contents, address);
1749 break;
1750 case R_SCORE_HI16:
1751 break;
1752 case R_SCORE_LO16:
1753 hi16_addend = bfd_get_32 (abfd, address - 4);
1754 hi16_offset = ((((hi16_addend >> 16) & 0x3) << 15) | (hi16_addend & 0x7fff)) >> 1;
1755 offset = ((((contents >> 16) & 0x3) << 15) | (contents & 0x7fff)) >> 1;
1756 offset = (hi16_offset << 16) | (offset & 0xffff);
1757 uvalue = increment + offset;
1758 hi16_offset = (uvalue >> 16) << 1;
1759 hi16_value = (hi16_addend & (~(howto->dst_mask)))
1760 | (hi16_offset & 0x7fff) | ((hi16_offset << 1) & 0x30000);
1761 bfd_put_32 (abfd, hi16_value, address - 4);
1762 offset = (uvalue & 0xffff) << 1;
1763 contents = (contents & (~(howto->dst_mask))) | (offset & 0x7fff) | ((offset << 1) & 0x30000);
1764 bfd_put_32 (abfd, contents, address);
1765 break;
1766 case R_SCORE_24:
1767 offset =
1768 (((contents & howto->src_mask) >> 1) & 0x1ff8000) | ((contents & howto->src_mask) & 0x7fff);
1769 offset += increment;
1770 contents =
1771 (contents & ~howto->
1772 src_mask) | (((offset << 1) & howto->src_mask) & 0x3ff0000) | (offset & 0x7fff);
1773 bfd_put_32 (abfd, contents, address);
1774 break;
1775 case R_SCORE16_11:
1776
1777 contents = bfd_get_16 (abfd, address);
1778 offset = contents & howto->src_mask;
1779 offset += increment;
1780 contents = (contents & ~howto->src_mask) | (offset & howto->src_mask);
1781 bfd_put_16 (abfd, contents, address);
1782
1783 break;
1784 case R_SCORE16_PC8:
1785
1786 contents = bfd_get_16 (abfd, address);
1787 offset = (contents & howto->src_mask) + ((increment >> 1) & 0xff);
1788 contents = (contents & (~howto->src_mask)) | (offset & howto->src_mask);
1789 bfd_put_16 (abfd, contents, address);
1790
1791 break;
1792 case R_SCORE_GOT15:
1793 case R_SCORE_GOT_LO16:
1794 break;
1795
1796 default:
1797 addend += increment;
1798 contents = (contents & ~howto->dst_mask) | (addend & howto->dst_mask);
1799 bfd_put_32 (abfd, contents, address);
1800 break;
1801 }
1802 }
1803
1804 /* Perform a relocation as part of a final link. */
1805
1806 static bfd_reloc_status_type
score_elf_final_link_relocate(reloc_howto_type * howto,bfd * input_bfd,bfd * output_bfd,asection * input_section,bfd_byte * contents,Elf_Internal_Rela * rel,Elf_Internal_Rela * relocs,bfd_vma symbol,struct bfd_link_info * info,const char * sym_name ATTRIBUTE_UNUSED,int sym_flags ATTRIBUTE_UNUSED,struct score_elf_link_hash_entry * h,Elf_Internal_Sym * local_syms,asection ** local_sections,bfd_boolean gp_disp_p)1807 score_elf_final_link_relocate (reloc_howto_type *howto,
1808 bfd *input_bfd,
1809 bfd *output_bfd,
1810 asection *input_section,
1811 bfd_byte *contents,
1812 Elf_Internal_Rela *rel,
1813 Elf_Internal_Rela *relocs,
1814 bfd_vma symbol,
1815 struct bfd_link_info *info,
1816 const char *sym_name ATTRIBUTE_UNUSED,
1817 int sym_flags ATTRIBUTE_UNUSED,
1818 struct score_elf_link_hash_entry *h,
1819 Elf_Internal_Sym *local_syms,
1820 asection **local_sections,
1821 bfd_boolean gp_disp_p)
1822 {
1823 unsigned long r_type;
1824 unsigned long r_symndx;
1825 bfd_byte *hit_data = contents + rel->r_offset;
1826 bfd_vma addend;
1827 /* The final GP value to be used for the relocatable, executable, or
1828 shared object file being produced. */
1829 bfd_vma gp = MINUS_ONE;
1830 /* The place (section offset or address) of the storage unit being relocated. */
1831 bfd_vma rel_addr;
1832 /* The value of GP used to create the relocatable object. */
1833 bfd_vma gp0 = MINUS_ONE;
1834 /* The offset into the global offset table at which the address of the relocation entry
1835 symbol, adjusted by the addend, resides during execution. */
1836 bfd_vma g = MINUS_ONE;
1837 /* TRUE if the symbol referred to by this relocation is a local symbol. */
1838 bfd_boolean local_p;
1839 /* The eventual value we will relocate. */
1840 bfd_vma value = symbol;
1841 unsigned long hi16_addend, hi16_offset, hi16_value, uvalue, offset, abs_value = 0;
1842
1843 Elf_Internal_Sym *sym = 0;
1844 asection *sec = NULL;
1845 bfd_boolean merge_p = 0;
1846
1847
1848 if (elf_gp (output_bfd) == 0)
1849 {
1850 struct bfd_link_hash_entry *bh;
1851 asection *o;
1852
1853 bh = bfd_link_hash_lookup (info->hash, "_gp", 0, 0, 1);
1854 if (bh != NULL && bh->type == bfd_link_hash_defined)
1855 {
1856 elf_gp (output_bfd) = (bh->u.def.value
1857 + bh->u.def.section->output_offset);
1858 if (bh->u.def.section->output_section)
1859 elf_gp (output_bfd) += bh->u.def.section->output_section->vma;
1860 }
1861 else if (bfd_link_relocatable (info))
1862 {
1863 bfd_vma lo = -1;
1864
1865 /* Find the GP-relative section with the lowest offset. */
1866 for (o = output_bfd->sections; o != NULL; o = o->next)
1867 if (o->vma < lo)
1868 lo = o->vma;
1869 /* And calculate GP relative to that. */
1870 elf_gp (output_bfd) = lo + ELF_SCORE_GP_OFFSET (input_bfd);
1871 }
1872 else
1873 {
1874 /* If the relocate_section function needs to do a reloc
1875 involving the GP value, it should make a reloc_dangerous
1876 callback to warn that GP is not defined. */
1877 }
1878 }
1879
1880 /* Parse the relocation. */
1881 r_symndx = ELF32_R_SYM (rel->r_info);
1882 r_type = ELF32_R_TYPE (rel->r_info);
1883 rel_addr = (input_section->output_section->vma + input_section->output_offset + rel->r_offset);
1884
1885 /* For hidden symbol. */
1886 local_p = score_elf_local_relocation_p (input_bfd, rel, local_sections, FALSE);
1887 if (local_p)
1888 {
1889 sym = local_syms + r_symndx;
1890 sec = local_sections[r_symndx];
1891
1892 symbol = sec->output_section->vma + sec->output_offset;
1893 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION
1894 || (sec->flags & SEC_MERGE))
1895 symbol += sym->st_value;
1896 if ((sec->flags & SEC_MERGE)
1897 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
1898 merge_p = 1;
1899 }
1900
1901 if (r_type == R_SCORE_GOT15)
1902 {
1903 const Elf_Internal_Rela *relend;
1904 const Elf_Internal_Rela *lo16_rel;
1905 bfd_vma lo_value = 0;
1906
1907 relend = relocs + input_section->reloc_count;
1908 lo16_rel = score_elf_next_relocation (input_bfd, R_SCORE_GOT_LO16, rel, relend);
1909 if ((local_p) && (lo16_rel != NULL))
1910 {
1911 bfd_vma tmp = 0;
1912 tmp = bfd_get_32 (input_bfd, contents + lo16_rel->r_offset);
1913 lo_value = (((tmp >> 16) & 0x3) << 14) | ((tmp & 0x7fff) >> 1);
1914 if (merge_p)
1915 {
1916 asection *msec = sec;
1917 lo_value = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, lo_value);
1918 lo_value -= symbol;
1919 lo_value += msec->output_section->vma + msec->output_offset;
1920 }
1921 }
1922 addend = lo_value;
1923 }
1924 else
1925 {
1926 addend = (bfd_get_32 (input_bfd, hit_data) >> howto->bitpos) & howto->src_mask;
1927 }
1928
1929 /* Figure out the value of the symbol. */
1930 if (local_p && !merge_p)
1931 {
1932 if (r_type == R_SCORE_GOT15)
1933 {
1934 const Elf_Internal_Rela *relend;
1935 const Elf_Internal_Rela *lo16_rel;
1936 bfd_vma lo_value = 0;
1937
1938 value = bfd_get_32 (input_bfd, contents + rel->r_offset);
1939 addend = value & 0x7fff;
1940 if ((addend & 0x4000) == 0x4000)
1941 addend |= 0xffffc000;
1942
1943 relend = relocs + input_section->reloc_count;
1944 lo16_rel = score_elf_next_relocation (input_bfd, R_SCORE_GOT_LO16, rel, relend);
1945 if ((local_p) && (lo16_rel != NULL))
1946 {
1947 bfd_vma tmp = 0;
1948 tmp = bfd_get_32 (input_bfd, contents + lo16_rel->r_offset);
1949 lo_value = (((tmp >> 16) & 0x3) << 14) | ((tmp & 0x7fff) >> 1);
1950 }
1951
1952 addend <<= 16;
1953 addend += lo_value;
1954 }
1955 }
1956
1957 local_p = score_elf_local_relocation_p (input_bfd, rel, local_sections, TRUE);
1958
1959 /* If we haven't already determined the GOT offset, or the GP value,
1960 and we're going to need it, get it now. */
1961 switch (r_type)
1962 {
1963 case R_SCORE_CALL15:
1964 case R_SCORE_GOT15:
1965 if (!local_p)
1966 {
1967 g = score_elf_global_got_index (elf_hash_table (info)->dynobj,
1968 (struct elf_link_hash_entry *) h);
1969 if ((! elf_hash_table(info)->dynamic_sections_created
1970 || (bfd_link_pic (info)
1971 && (info->symbolic || h->root.dynindx == -1)
1972 && h->root.def_regular)))
1973 {
1974 /* This is a static link or a -Bsymbolic link. The
1975 symbol is defined locally, or was forced to be local.
1976 We must initialize this entry in the GOT. */
1977 bfd *tmpbfd = elf_hash_table (info)->dynobj;
1978 asection *sgot = score_elf_got_section (tmpbfd, FALSE);
1979 bfd_put_32 (tmpbfd, value, sgot->contents + g);
1980 }
1981 }
1982 else if (r_type == R_SCORE_GOT15 || r_type == R_SCORE_CALL15)
1983 {
1984 /* There's no need to create a local GOT entry here; the
1985 calculation for a local GOT15 entry does not involve G. */
1986 ;
1987 }
1988 else
1989 {
1990 g = score_elf_local_got_index (output_bfd, input_bfd, info,
1991 symbol + addend, r_symndx, h, r_type);
1992 if (g == MINUS_ONE)
1993 return bfd_reloc_outofrange;
1994 }
1995
1996 /* Convert GOT indices to actual offsets. */
1997 g = score_elf_got_offset_from_index (elf_hash_table (info)->dynobj,
1998 output_bfd, input_bfd, g);
1999 break;
2000
2001 case R_SCORE_HI16:
2002 case R_SCORE_LO16:
2003 case R_SCORE_GPREL32:
2004 gp0 = _bfd_get_gp_value (input_bfd);
2005 gp = _bfd_get_gp_value (output_bfd);
2006 break;
2007
2008 case R_SCORE_GP15:
2009 gp = _bfd_get_gp_value (output_bfd);
2010
2011 default:
2012 break;
2013 }
2014
2015 switch (r_type)
2016 {
2017 case R_SCORE_NONE:
2018 return bfd_reloc_ok;
2019
2020 case R_SCORE_ABS32:
2021 case R_SCORE_REL32:
2022 if ((bfd_link_pic (info)
2023 || (elf_hash_table (info)->dynamic_sections_created
2024 && h != NULL
2025 && h->root.def_dynamic
2026 && !h->root.def_regular))
2027 && r_symndx != STN_UNDEF
2028 && (input_section->flags & SEC_ALLOC) != 0)
2029 {
2030 /* If we're creating a shared library, or this relocation is against a symbol
2031 in a shared library, then we can't know where the symbol will end up.
2032 So, we create a relocation record in the output, and leave the job up
2033 to the dynamic linker. */
2034 value = addend;
2035 if (!score_elf_create_dynamic_relocation (output_bfd, info, rel, h,
2036 symbol, &value,
2037 input_section))
2038 return bfd_reloc_undefined;
2039 }
2040 else if (r_symndx == STN_UNDEF)
2041 /* r_symndx will be STN_UNDEF (zero) only for relocs against symbols
2042 from removed linkonce sections, or sections discarded by
2043 a linker script. */
2044 value = 0;
2045 else
2046 {
2047 if (r_type != R_SCORE_REL32)
2048 value = symbol + addend;
2049 else
2050 value = addend;
2051 }
2052 value &= howto->dst_mask;
2053 bfd_put_32 (input_bfd, value, hit_data);
2054 return bfd_reloc_ok;
2055
2056 case R_SCORE_ABS16:
2057 value += addend;
2058 if ((long) value > 0x7fff || (long) value < -0x8000)
2059 return bfd_reloc_overflow;
2060 bfd_put_16 (input_bfd, value, hit_data);
2061 return bfd_reloc_ok;
2062
2063 case R_SCORE_24:
2064 addend = bfd_get_32 (input_bfd, hit_data);
2065 offset = (((addend & howto->src_mask) >> 1) & 0x1ff8000) | ((addend & howto->src_mask) & 0x7fff);
2066 if ((offset & 0x1000000) != 0)
2067 offset |= 0xfe000000;
2068 value += offset;
2069 abs_value = value - rel_addr;
2070 if ((abs_value & 0xfe000000) != 0)
2071 return bfd_reloc_overflow;
2072 addend = (addend & ~howto->src_mask)
2073 | (((value << 1) & howto->src_mask) & 0x3ff0000) | (value & 0x7fff);
2074 bfd_put_32 (input_bfd, addend, hit_data);
2075 return bfd_reloc_ok;
2076
2077 case R_SCORE_PC19:
2078 addend = bfd_get_32 (input_bfd, hit_data);
2079 offset = (((addend & howto->src_mask) & 0x3ff0000) >> 6) | ((addend & howto->src_mask) & 0x3ff);
2080 if ((offset & 0x80000) != 0)
2081 offset |= 0xfff00000;
2082 abs_value = value = value - rel_addr + offset;
2083 /* exceed 20 bit : overflow. */
2084 if ((abs_value & 0x80000000) == 0x80000000)
2085 abs_value = 0xffffffff - value + 1;
2086 if ((abs_value & 0xfff80000) != 0)
2087 return bfd_reloc_overflow;
2088 addend = (addend & ~howto->src_mask)
2089 | (((value << 6) & howto->src_mask) & 0x3ff0000) | (value & 0x3ff);
2090 bfd_put_32 (input_bfd, addend, hit_data);
2091 return bfd_reloc_ok;
2092
2093 case R_SCORE16_11:
2094 addend = bfd_get_16 (input_bfd, hit_data);
2095 offset = addend & howto->src_mask;
2096 if ((offset & 0x800) != 0) /* Offset is negative. */
2097 offset |= 0xfffff000;
2098 value += offset;
2099 abs_value = value - rel_addr;
2100 if ((abs_value & 0xfffff000) != 0)
2101 return bfd_reloc_overflow;
2102 addend = (addend & ~howto->src_mask) | (value & howto->src_mask);
2103 bfd_put_16 (input_bfd, addend, hit_data);
2104 return bfd_reloc_ok;
2105
2106 case R_SCORE16_PC8:
2107 addend = bfd_get_16 (input_bfd, hit_data);
2108 offset = (addend & howto->src_mask) << 1;
2109 if ((offset & 0x100) != 0) /* Offset is negative. */
2110 offset |= 0xfffffe00;
2111 abs_value = value = value - rel_addr + offset;
2112 /* Sign bit + exceed 9 bit. */
2113 if (((value & 0xffffff00) != 0) && ((value & 0xffffff00) != 0xffffff00))
2114 return bfd_reloc_overflow;
2115 value >>= 1;
2116 addend = (addend & ~howto->src_mask) | (value & howto->src_mask);
2117 bfd_put_16 (input_bfd, addend, hit_data);
2118 return bfd_reloc_ok;
2119
2120 case R_SCORE_HI16:
2121 return bfd_reloc_ok;
2122
2123 case R_SCORE_LO16:
2124 hi16_addend = bfd_get_32 (input_bfd, hit_data - 4);
2125 hi16_offset = ((((hi16_addend >> 16) & 0x3) << 15) | (hi16_addend & 0x7fff)) >> 1;
2126 addend = bfd_get_32 (input_bfd, hit_data);
2127 offset = ((((addend >> 16) & 0x3) << 15) | (addend & 0x7fff)) >> 1;
2128 offset = (hi16_offset << 16) | (offset & 0xffff);
2129
2130 if (!gp_disp_p)
2131 uvalue = value + offset;
2132 else
2133 uvalue = offset + gp - rel_addr + 4;
2134
2135 hi16_offset = (uvalue >> 16) << 1;
2136 hi16_value = (hi16_addend & (~(howto->dst_mask)))
2137 | (hi16_offset & 0x7fff) | ((hi16_offset << 1) & 0x30000);
2138 bfd_put_32 (input_bfd, hi16_value, hit_data - 4);
2139 offset = (uvalue & 0xffff) << 1;
2140 value = (addend & (~(howto->dst_mask))) | (offset & 0x7fff) | ((offset << 1) & 0x30000);
2141 bfd_put_32 (input_bfd, value, hit_data);
2142 return bfd_reloc_ok;
2143
2144 case R_SCORE_GP15:
2145 addend = bfd_get_32 (input_bfd, hit_data);
2146 offset = addend & 0x7fff;
2147 if ((offset & 0x4000) == 0x4000)
2148 offset |= 0xffffc000;
2149 value = value + offset - gp;
2150 if (((value & 0xffffc000) != 0) && ((value & 0xffffc000) != 0xffffc000))
2151 return bfd_reloc_overflow;
2152 value = (addend & ~howto->src_mask) | (value & howto->src_mask);
2153 bfd_put_32 (input_bfd, value, hit_data);
2154 return bfd_reloc_ok;
2155
2156 case R_SCORE_GOT15:
2157 case R_SCORE_CALL15:
2158 if (local_p)
2159 {
2160 bfd_boolean forced;
2161
2162 /* The special case is when the symbol is forced to be local. We need the
2163 full address in the GOT since no R_SCORE_GOT_LO16 relocation follows. */
2164 forced = ! score_elf_local_relocation_p (input_bfd, rel,
2165 local_sections, FALSE);
2166 value = score_elf_got16_entry (output_bfd, input_bfd, info,
2167 symbol + addend, forced);
2168 if (value == MINUS_ONE)
2169 return bfd_reloc_outofrange;
2170 value = score_elf_got_offset_from_index (elf_hash_table (info)->dynobj,
2171 output_bfd, input_bfd, value);
2172 }
2173 else
2174 {
2175 value = g;
2176 }
2177
2178 if ((long) value > 0x3fff || (long) value < -0x4000)
2179 return bfd_reloc_overflow;
2180
2181 addend = bfd_get_32 (input_bfd, hit_data);
2182 value = (addend & ~howto->dst_mask) | (value & howto->dst_mask);
2183 bfd_put_32 (input_bfd, value, hit_data);
2184 return bfd_reloc_ok;
2185
2186 case R_SCORE_GPREL32:
2187 value = (addend + symbol + gp0 - gp);
2188 value &= howto->dst_mask;
2189 bfd_put_32 (input_bfd, value, hit_data);
2190 return bfd_reloc_ok;
2191
2192 case R_SCORE_GOT_LO16:
2193 addend = bfd_get_32 (input_bfd, hit_data);
2194 value = (((addend >> 16) & 0x3) << 14) | ((addend & 0x7fff) >> 1);
2195 value += symbol;
2196 value = (addend & (~(howto->dst_mask))) | ((value & 0x3fff) << 1)
2197 | (((value >> 14) & 0x3) << 16);
2198
2199 bfd_put_32 (input_bfd, value, hit_data);
2200 return bfd_reloc_ok;
2201
2202 case R_SCORE_DUMMY_HI16:
2203 return bfd_reloc_ok;
2204
2205 case R_SCORE_GNU_VTINHERIT:
2206 case R_SCORE_GNU_VTENTRY:
2207 /* We don't do anything with these at present. */
2208 return bfd_reloc_continue;
2209
2210 default:
2211 return bfd_reloc_notsupported;
2212 }
2213 }
2214
2215 /* Score backend functions. */
2216
2217 bfd_boolean
s7_bfd_score_info_to_howto(bfd * abfd ATTRIBUTE_UNUSED,arelent * bfd_reloc,Elf_Internal_Rela * elf_reloc)2218 s7_bfd_score_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
2219 arelent *bfd_reloc,
2220 Elf_Internal_Rela *elf_reloc)
2221 {
2222 unsigned int r_type;
2223
2224 r_type = ELF32_R_TYPE (elf_reloc->r_info);
2225 if (r_type >= ARRAY_SIZE (elf32_score_howto_table))
2226 return FALSE;
2227
2228 bfd_reloc->howto = &elf32_score_howto_table[r_type];
2229 return TRUE;
2230 }
2231
2232 /* Relocate an score ELF section. */
2233
2234 bfd_boolean
s7_bfd_score_elf_relocate_section(bfd * output_bfd,struct bfd_link_info * info,bfd * input_bfd,asection * input_section,bfd_byte * contents,Elf_Internal_Rela * relocs,Elf_Internal_Sym * local_syms,asection ** local_sections)2235 s7_bfd_score_elf_relocate_section (bfd *output_bfd,
2236 struct bfd_link_info *info,
2237 bfd *input_bfd,
2238 asection *input_section,
2239 bfd_byte *contents,
2240 Elf_Internal_Rela *relocs,
2241 Elf_Internal_Sym *local_syms,
2242 asection **local_sections)
2243 {
2244 Elf_Internal_Shdr *symtab_hdr;
2245 Elf_Internal_Rela *rel;
2246 Elf_Internal_Rela *relend;
2247 const char *name;
2248 unsigned long offset;
2249 unsigned long hi16_addend, hi16_offset, hi16_value, uvalue;
2250 size_t extsymoff;
2251 bfd_boolean gp_disp_p = FALSE;
2252
2253 /* Sort dynsym. */
2254 if (elf_hash_table (info)->dynamic_sections_created)
2255 {
2256 bfd_size_type dynsecsymcount = 0;
2257 if (bfd_link_pic (info))
2258 {
2259 asection * p;
2260 const struct elf_backend_data *bed = get_elf_backend_data (output_bfd);
2261
2262 for (p = output_bfd->sections; p ; p = p->next)
2263 if ((p->flags & SEC_EXCLUDE) == 0
2264 && (p->flags & SEC_ALLOC) != 0
2265 && !(*bed->elf_backend_omit_section_dynsym) (output_bfd, info, p))
2266 ++ dynsecsymcount;
2267 }
2268
2269 if (!score_elf_sort_hash_table (info, dynsecsymcount + 1))
2270 return FALSE;
2271 }
2272
2273 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2274 extsymoff = (elf_bad_symtab (input_bfd)) ? 0 : symtab_hdr->sh_info;
2275 rel = relocs;
2276 relend = relocs + input_section->reloc_count;
2277 for (; rel < relend; rel++)
2278 {
2279 int r_type;
2280 reloc_howto_type *howto;
2281 unsigned long r_symndx;
2282 Elf_Internal_Sym *sym;
2283 asection *sec;
2284 struct score_elf_link_hash_entry *h;
2285 bfd_vma relocation = 0;
2286 bfd_reloc_status_type r;
2287 arelent bfd_reloc;
2288
2289 r_symndx = ELF32_R_SYM (rel->r_info);
2290 r_type = ELF32_R_TYPE (rel->r_info);
2291
2292 if (! s7_bfd_score_info_to_howto (input_bfd, &bfd_reloc, (Elf_Internal_Rela *) rel))
2293 continue;
2294 howto = bfd_reloc.howto;
2295
2296 h = NULL;
2297 sym = NULL;
2298 sec = NULL;
2299
2300 if (r_symndx < extsymoff)
2301 {
2302 sym = local_syms + r_symndx;
2303 sec = local_sections[r_symndx];
2304 relocation = sec->output_section->vma + sec->output_offset;
2305 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
2306
2307 if (!bfd_link_relocatable (info))
2308 {
2309 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION
2310 || (sec->flags & SEC_MERGE))
2311 {
2312 relocation += sym->st_value;
2313 }
2314
2315 if ((sec->flags & SEC_MERGE)
2316 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
2317 {
2318 asection *msec;
2319 bfd_vma addend, value;
2320
2321 switch (r_type)
2322 {
2323 case R_SCORE_HI16:
2324 break;
2325 case R_SCORE_LO16:
2326 hi16_addend = bfd_get_32 (input_bfd, contents + rel->r_offset - 4);
2327 hi16_offset = ((((hi16_addend >> 16) & 0x3) << 15) | (hi16_addend & 0x7fff)) >> 1;
2328 value = bfd_get_32 (input_bfd, contents + rel->r_offset);
2329 offset = ((((value >> 16) & 0x3) << 15) | (value & 0x7fff)) >> 1;
2330 addend = (hi16_offset << 16) | (offset & 0xffff);
2331 msec = sec;
2332 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend);
2333 addend -= relocation;
2334 addend += msec->output_section->vma + msec->output_offset;
2335 uvalue = addend;
2336 hi16_offset = (uvalue >> 16) << 1;
2337 hi16_value = (hi16_addend & (~(howto->dst_mask)))
2338 | (hi16_offset & 0x7fff) | ((hi16_offset << 1) & 0x30000);
2339 bfd_put_32 (input_bfd, hi16_value, contents + rel->r_offset - 4);
2340 offset = (uvalue & 0xffff) << 1;
2341 value = (value & (~(howto->dst_mask)))
2342 | (offset & 0x7fff) | ((offset << 1) & 0x30000);
2343 bfd_put_32 (input_bfd, value, contents + rel->r_offset);
2344 break;
2345 case R_SCORE_GOT_LO16:
2346 value = bfd_get_32 (input_bfd, contents + rel->r_offset);
2347 addend = (((value >> 16) & 0x3) << 14) | ((value & 0x7fff) >> 1);
2348 msec = sec;
2349 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend) - relocation;
2350 addend += msec->output_section->vma + msec->output_offset;
2351 value = (value & (~(howto->dst_mask))) | ((addend & 0x3fff) << 1)
2352 | (((addend >> 14) & 0x3) << 16);
2353
2354 bfd_put_32 (input_bfd, value, contents + rel->r_offset);
2355 break;
2356 default:
2357 value = bfd_get_32 (input_bfd, contents + rel->r_offset);
2358 /* Get the (signed) value from the instruction. */
2359 addend = value & howto->src_mask;
2360 if (addend & ((howto->src_mask + 1) >> 1))
2361 {
2362 bfd_signed_vma mask;
2363
2364 mask = -1;
2365 mask &= ~howto->src_mask;
2366 addend |= mask;
2367 }
2368 msec = sec;
2369 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend) - relocation;
2370 addend += msec->output_section->vma + msec->output_offset;
2371 value = (value & ~howto->dst_mask) | (addend & howto->dst_mask);
2372 bfd_put_32 (input_bfd, value, contents + rel->r_offset);
2373 break;
2374 }
2375 }
2376 }
2377 }
2378 else
2379 {
2380 /* For global symbols we look up the symbol in the hash-table. */
2381 h = ((struct score_elf_link_hash_entry *)
2382 elf_sym_hashes (input_bfd) [r_symndx - extsymoff]);
2383
2384 if (info->wrap_hash != NULL
2385 && (input_section->flags & SEC_DEBUGGING) != 0)
2386 h = ((struct score_elf_link_hash_entry *)
2387 unwrap_hash_lookup (info, input_bfd, &h->root.root));
2388
2389 /* Find the real hash-table entry for this symbol. */
2390 while (h->root.root.type == bfd_link_hash_indirect
2391 || h->root.root.type == bfd_link_hash_warning)
2392 h = (struct score_elf_link_hash_entry *) h->root.root.u.i.link;
2393
2394 /* Record the name of this symbol, for our caller. */
2395 name = h->root.root.root.string;
2396
2397 /* See if this is the special GP_DISP_LABEL symbol. Note that such a
2398 symbol must always be a global symbol. */
2399 if (strcmp (name, GP_DISP_LABEL) == 0)
2400 {
2401 /* Relocations against GP_DISP_LABEL are permitted only with
2402 R_SCORE_HI16 and R_SCORE_LO16 relocations. */
2403 if (r_type != R_SCORE_HI16 && r_type != R_SCORE_LO16)
2404 return bfd_reloc_notsupported;
2405
2406 gp_disp_p = TRUE;
2407 }
2408
2409 /* If this symbol is defined, calculate its address. Note that
2410 GP_DISP_LABEL is a magic symbol, always implicitly defined by the
2411 linker, so it's inappropriate to check to see whether or not
2412 its defined. */
2413 else if ((h->root.root.type == bfd_link_hash_defined
2414 || h->root.root.type == bfd_link_hash_defweak)
2415 && h->root.root.u.def.section)
2416 {
2417 sec = h->root.root.u.def.section;
2418 if (sec->output_section)
2419 relocation = (h->root.root.u.def.value
2420 + sec->output_section->vma
2421 + sec->output_offset);
2422 else
2423 {
2424 relocation = h->root.root.u.def.value;
2425 }
2426 }
2427 else if (h->root.root.type == bfd_link_hash_undefweak)
2428 /* We allow relocations against undefined weak symbols, giving
2429 it the value zero, so that you can undefined weak functions
2430 and check to see if they exist by looking at their addresses. */
2431 relocation = 0;
2432 else if (info->unresolved_syms_in_objects == RM_IGNORE
2433 && ELF_ST_VISIBILITY (h->root.other) == STV_DEFAULT)
2434 relocation = 0;
2435 else if (strcmp (name, "_DYNAMIC_LINK") == 0)
2436 {
2437 /* If this is a dynamic link, we should have created a _DYNAMIC_LINK symbol
2438 in s7_bfd_score_elf_create_dynamic_sections. Otherwise, we should define
2439 the symbol with a value of 0. */
2440 BFD_ASSERT (! bfd_link_pic (info));
2441 BFD_ASSERT (bfd_get_section_by_name (output_bfd, ".dynamic") == NULL);
2442 relocation = 0;
2443 }
2444 else if (!bfd_link_relocatable (info))
2445 {
2446 info->callbacks->undefined_symbol
2447 (info, h->root.root.root.string, input_bfd, input_section,
2448 rel->r_offset,
2449 (info->unresolved_syms_in_objects == RM_DIAGNOSE
2450 && !info->warn_unresolved_syms)
2451 || ELF_ST_VISIBILITY (h->root.other));
2452 relocation = 0;
2453 }
2454 }
2455
2456 if (sec != NULL && discarded_section (sec))
2457 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2458 rel, 1, relend, howto, 0, contents);
2459
2460 if (bfd_link_relocatable (info))
2461 {
2462 /* This is a relocatable link. We don't have to change
2463 anything, unless the reloc is against a section symbol,
2464 in which case we have to adjust according to where the
2465 section symbol winds up in the output section. */
2466 if (r_symndx < symtab_hdr->sh_info)
2467 {
2468 sym = local_syms + r_symndx;
2469
2470 if (r_type == R_SCORE_GOT15)
2471 {
2472 const Elf_Internal_Rela *lo16_rel;
2473 bfd_vma lo_addend = 0, lo_value = 0;
2474 bfd_vma addend, value;
2475
2476 value = bfd_get_32 (input_bfd, contents + rel->r_offset);
2477 addend = value & 0x7fff;
2478 if ((addend & 0x4000) == 0x4000)
2479 addend |= 0xffffc000;
2480
2481 relend = relocs + input_section->reloc_count;
2482 lo16_rel = score_elf_next_relocation (input_bfd, R_SCORE_GOT_LO16, rel, relend);
2483 if (lo16_rel != NULL)
2484 {
2485 lo_value = bfd_get_32 (input_bfd, contents + lo16_rel->r_offset);
2486 lo_addend = (((lo_value >> 16) & 0x3) << 14) | ((lo_value & 0x7fff) >> 1);
2487 }
2488
2489 addend <<= 16;
2490 addend += lo_addend;
2491
2492 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
2493 addend += local_sections[r_symndx]->output_offset;
2494
2495 lo_addend = addend & 0xffff;
2496 lo_value = (lo_value & (~(howto->dst_mask))) | ((lo_addend & 0x3fff) << 1)
2497 | (((lo_addend >> 14) & 0x3) << 16);
2498 bfd_put_32 (input_bfd, lo_value, contents + lo16_rel->r_offset);
2499
2500 addend = addend >> 16;
2501 value = (value & ~howto->src_mask) | (addend & howto->src_mask);
2502 bfd_put_32 (input_bfd, value, contents + rel->r_offset);
2503 }
2504 else if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
2505 {
2506 sec = local_sections[r_symndx];
2507 score_elf_add_to_rel (input_bfd, contents + rel->r_offset,
2508 howto, (bfd_signed_vma) (sec->output_offset + sym->st_value));
2509 }
2510 }
2511 continue;
2512 }
2513
2514 /* This is a final link. */
2515 r = score_elf_final_link_relocate (howto, input_bfd, output_bfd,
2516 input_section, contents, rel, relocs,
2517 relocation, info, name,
2518 (h ? ELF_ST_TYPE ((unsigned int) h->root.root.type) :
2519 ELF_ST_TYPE ((unsigned int) sym->st_info)), h, local_syms,
2520 local_sections, gp_disp_p);
2521
2522 if (r != bfd_reloc_ok)
2523 {
2524 const char *msg = (const char *)0;
2525
2526 switch (r)
2527 {
2528 case bfd_reloc_overflow:
2529 /* If the overflowing reloc was to an undefined symbol,
2530 we have already printed one error message and there
2531 is no point complaining again. */
2532 if (!h || h->root.root.type != bfd_link_hash_undefined)
2533 (*info->callbacks->reloc_overflow)
2534 (info, NULL, name, howto->name, (bfd_vma) 0,
2535 input_bfd, input_section, rel->r_offset);
2536 break;
2537 case bfd_reloc_undefined:
2538 (*info->callbacks->undefined_symbol)
2539 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
2540 break;
2541
2542 case bfd_reloc_outofrange:
2543 msg = _("internal error: out of range error");
2544 goto common_error;
2545
2546 case bfd_reloc_notsupported:
2547 msg = _("internal error: unsupported relocation error");
2548 goto common_error;
2549
2550 case bfd_reloc_dangerous:
2551 msg = _("internal error: dangerous error");
2552 goto common_error;
2553
2554 default:
2555 msg = _("internal error: unknown error");
2556 /* Fall through. */
2557
2558 common_error:
2559 (*info->callbacks->warning) (info, msg, name, input_bfd,
2560 input_section, rel->r_offset);
2561 break;
2562 }
2563 }
2564 }
2565
2566 return TRUE;
2567 }
2568
2569 /* Look through the relocs for a section during the first phase, and
2570 allocate space in the global offset table. */
2571
2572 bfd_boolean
s7_bfd_score_elf_check_relocs(bfd * abfd,struct bfd_link_info * info,asection * sec,const Elf_Internal_Rela * relocs)2573 s7_bfd_score_elf_check_relocs (bfd *abfd,
2574 struct bfd_link_info *info,
2575 asection *sec,
2576 const Elf_Internal_Rela *relocs)
2577 {
2578 bfd *dynobj;
2579 Elf_Internal_Shdr *symtab_hdr;
2580 struct elf_link_hash_entry **sym_hashes;
2581 struct score_got_info *g;
2582 size_t extsymoff;
2583 const Elf_Internal_Rela *rel;
2584 const Elf_Internal_Rela *rel_end;
2585 asection *sgot;
2586 asection *sreloc;
2587
2588 if (bfd_link_relocatable (info))
2589 return TRUE;
2590
2591 dynobj = elf_hash_table (info)->dynobj;
2592 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2593 sym_hashes = elf_sym_hashes (abfd);
2594 extsymoff = (elf_bad_symtab (abfd)) ? 0 : symtab_hdr->sh_info;
2595
2596 if (dynobj == NULL)
2597 {
2598 sgot = NULL;
2599 g = NULL;
2600 }
2601 else
2602 {
2603 sgot = score_elf_got_section (dynobj, FALSE);
2604 if (sgot == NULL)
2605 g = NULL;
2606 else
2607 {
2608 BFD_ASSERT (score_elf_section_data (sgot) != NULL);
2609 g = score_elf_section_data (sgot)->u.got_info;
2610 BFD_ASSERT (g != NULL);
2611 }
2612 }
2613
2614 sreloc = NULL;
2615 rel_end = relocs + sec->reloc_count;
2616 for (rel = relocs; rel < rel_end; ++rel)
2617 {
2618 unsigned long r_symndx;
2619 unsigned int r_type;
2620 struct elf_link_hash_entry *h;
2621
2622 r_symndx = ELF32_R_SYM (rel->r_info);
2623 r_type = ELF32_R_TYPE (rel->r_info);
2624
2625 if (r_symndx < extsymoff)
2626 {
2627 h = NULL;
2628 }
2629 else if (r_symndx >= extsymoff + NUM_SHDR_ENTRIES (symtab_hdr))
2630 {
2631 _bfd_error_handler
2632 /* xgettext:c-format */
2633 (_("%pB: malformed reloc detected for section %pA"), abfd, sec);
2634 bfd_set_error (bfd_error_bad_value);
2635 return FALSE;
2636 }
2637 else
2638 {
2639 h = sym_hashes[r_symndx - extsymoff];
2640
2641 /* This may be an indirect symbol created because of a version. */
2642 if (h != NULL)
2643 {
2644 while (h->root.type == bfd_link_hash_indirect)
2645 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2646 }
2647 }
2648
2649 /* Some relocs require a global offset table. */
2650 if (dynobj == NULL || sgot == NULL)
2651 {
2652 switch (r_type)
2653 {
2654 case R_SCORE_GOT15:
2655 case R_SCORE_CALL15:
2656 if (dynobj == NULL)
2657 elf_hash_table (info)->dynobj = dynobj = abfd;
2658 if (!score_elf_create_got_section (dynobj, info, FALSE))
2659 return FALSE;
2660 g = score_elf_got_info (dynobj, &sgot);
2661 break;
2662 case R_SCORE_ABS32:
2663 case R_SCORE_REL32:
2664 if (dynobj == NULL
2665 && (bfd_link_pic (info) || h != NULL)
2666 && (sec->flags & SEC_ALLOC) != 0)
2667 elf_hash_table (info)->dynobj = dynobj = abfd;
2668 break;
2669 default:
2670 break;
2671 }
2672 }
2673
2674 if (!h && (r_type == R_SCORE_GOT_LO16))
2675 {
2676 if (! score_elf_record_local_got_symbol (abfd, r_symndx, rel->r_addend, g))
2677 return FALSE;
2678 }
2679
2680 switch (r_type)
2681 {
2682 case R_SCORE_CALL15:
2683 if (h == NULL)
2684 {
2685 _bfd_error_handler
2686 /* xgettext:c-format */
2687 (_("%pB: CALL15 reloc at %#" PRIx64 " not against global symbol"),
2688 abfd, (uint64_t) rel->r_offset);
2689 bfd_set_error (bfd_error_bad_value);
2690 return FALSE;
2691 }
2692 else
2693 {
2694 /* This symbol requires a global offset table entry. */
2695 if (! score_elf_record_global_got_symbol (h, abfd, info, g))
2696 return FALSE;
2697
2698 /* We need a stub, not a plt entry for the undefined function. But we record
2699 it as if it needs plt. See _bfd_elf_adjust_dynamic_symbol. */
2700 h->needs_plt = 1;
2701 h->type = STT_FUNC;
2702 }
2703 break;
2704 case R_SCORE_GOT15:
2705 if (h && ! score_elf_record_global_got_symbol (h, abfd, info, g))
2706 return FALSE;
2707 break;
2708 case R_SCORE_ABS32:
2709 case R_SCORE_REL32:
2710 if ((bfd_link_pic (info) || h != NULL)
2711 && (sec->flags & SEC_ALLOC) != 0)
2712 {
2713 if (sreloc == NULL)
2714 {
2715 sreloc = score_elf_rel_dyn_section (dynobj, TRUE);
2716 if (sreloc == NULL)
2717 return FALSE;
2718 }
2719 #define SCORE_READONLY_SECTION (SEC_ALLOC | SEC_LOAD | SEC_READONLY)
2720 if (bfd_link_pic (info))
2721 {
2722 /* When creating a shared object, we must copy these reloc types into
2723 the output file as R_SCORE_REL32 relocs. We make room for this reloc
2724 in the .rel.dyn reloc section. */
2725 score_elf_allocate_dynamic_relocations (dynobj, 1);
2726 if ((sec->flags & SCORE_READONLY_SECTION)
2727 == SCORE_READONLY_SECTION)
2728 /* We tell the dynamic linker that there are
2729 relocations against the text segment. */
2730 info->flags |= DF_TEXTREL;
2731 }
2732 else
2733 {
2734 struct score_elf_link_hash_entry *hscore;
2735
2736 /* We only need to copy this reloc if the symbol is
2737 defined in a dynamic object. */
2738 hscore = (struct score_elf_link_hash_entry *) h;
2739 ++hscore->possibly_dynamic_relocs;
2740 if ((sec->flags & SCORE_READONLY_SECTION)
2741 == SCORE_READONLY_SECTION)
2742 /* We need it to tell the dynamic linker if there
2743 are relocations against the text segment. */
2744 hscore->readonly_reloc = TRUE;
2745 }
2746
2747 /* Even though we don't directly need a GOT entry for this symbol,
2748 a symbol must have a dynamic symbol table index greater that
2749 DT_SCORE_GOTSYM if there are dynamic relocations against it. */
2750 if (h != NULL)
2751 {
2752 if (dynobj == NULL)
2753 elf_hash_table (info)->dynobj = dynobj = abfd;
2754 if (! score_elf_create_got_section (dynobj, info, TRUE))
2755 return FALSE;
2756 g = score_elf_got_info (dynobj, &sgot);
2757 if (! score_elf_record_global_got_symbol (h, abfd, info, g))
2758 return FALSE;
2759 }
2760 }
2761 break;
2762
2763 /* This relocation describes the C++ object vtable hierarchy.
2764 Reconstruct it for later use during GC. */
2765 case R_SCORE_GNU_VTINHERIT:
2766 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2767 return FALSE;
2768 break;
2769
2770 /* This relocation describes which C++ vtable entries are actually
2771 used. Record for later use during GC. */
2772 case R_SCORE_GNU_VTENTRY:
2773 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
2774 return FALSE;
2775 break;
2776 default:
2777 break;
2778 }
2779
2780 /* We must not create a stub for a symbol that has relocations
2781 related to taking the function's address. */
2782 switch (r_type)
2783 {
2784 default:
2785 if (h != NULL)
2786 {
2787 struct score_elf_link_hash_entry *sh;
2788
2789 sh = (struct score_elf_link_hash_entry *) h;
2790 sh->no_fn_stub = TRUE;
2791 }
2792 break;
2793 case R_SCORE_CALL15:
2794 break;
2795 }
2796 }
2797
2798 return TRUE;
2799 }
2800
2801 bfd_boolean
s7_bfd_score_elf_add_symbol_hook(bfd * abfd,struct bfd_link_info * info ATTRIBUTE_UNUSED,Elf_Internal_Sym * sym,const char ** namep ATTRIBUTE_UNUSED,flagword * flagsp ATTRIBUTE_UNUSED,asection ** secp,bfd_vma * valp)2802 s7_bfd_score_elf_add_symbol_hook (bfd *abfd,
2803 struct bfd_link_info *info ATTRIBUTE_UNUSED,
2804 Elf_Internal_Sym *sym,
2805 const char **namep ATTRIBUTE_UNUSED,
2806 flagword *flagsp ATTRIBUTE_UNUSED,
2807 asection **secp,
2808 bfd_vma *valp)
2809 {
2810 switch (sym->st_shndx)
2811 {
2812 case SHN_COMMON:
2813 if (sym->st_size > elf_gp_size (abfd))
2814 break;
2815 /* Fall through. */
2816 case SHN_SCORE_SCOMMON:
2817 *secp = bfd_make_section_old_way (abfd, ".scommon");
2818 (*secp)->flags |= SEC_IS_COMMON | SEC_SMALL_DATA;
2819 *valp = sym->st_size;
2820 break;
2821 }
2822
2823 return TRUE;
2824 }
2825
2826 void
s7_bfd_score_elf_symbol_processing(bfd * abfd,asymbol * asym)2827 s7_bfd_score_elf_symbol_processing (bfd *abfd, asymbol *asym)
2828 {
2829 elf_symbol_type *elfsym;
2830
2831 elfsym = (elf_symbol_type *) asym;
2832 switch (elfsym->internal_elf_sym.st_shndx)
2833 {
2834 case SHN_COMMON:
2835 if (asym->value > elf_gp_size (abfd))
2836 break;
2837 /* Fall through. */
2838 case SHN_SCORE_SCOMMON:
2839 if (score_elf_scom_section.name == NULL)
2840 {
2841 /* Initialize the small common section. */
2842 score_elf_scom_section.name = ".scommon";
2843 score_elf_scom_section.flags = SEC_IS_COMMON | SEC_SMALL_DATA;
2844 score_elf_scom_section.output_section = &score_elf_scom_section;
2845 score_elf_scom_section.symbol = &score_elf_scom_symbol;
2846 score_elf_scom_section.symbol_ptr_ptr = &score_elf_scom_symbol_ptr;
2847 score_elf_scom_symbol.name = ".scommon";
2848 score_elf_scom_symbol.flags = BSF_SECTION_SYM;
2849 score_elf_scom_symbol.section = &score_elf_scom_section;
2850 score_elf_scom_symbol_ptr = &score_elf_scom_symbol;
2851 }
2852 asym->section = &score_elf_scom_section;
2853 asym->value = elfsym->internal_elf_sym.st_size;
2854 break;
2855 }
2856 }
2857
2858 int
s7_bfd_score_elf_link_output_symbol_hook(struct bfd_link_info * info ATTRIBUTE_UNUSED,const char * name ATTRIBUTE_UNUSED,Elf_Internal_Sym * sym,asection * input_sec,struct elf_link_hash_entry * h ATTRIBUTE_UNUSED)2859 s7_bfd_score_elf_link_output_symbol_hook (struct bfd_link_info *info ATTRIBUTE_UNUSED,
2860 const char *name ATTRIBUTE_UNUSED,
2861 Elf_Internal_Sym *sym,
2862 asection *input_sec,
2863 struct elf_link_hash_entry *h ATTRIBUTE_UNUSED)
2864 {
2865 /* If we see a common symbol, which implies a relocatable link, then
2866 if a symbol was small common in an input file, mark it as small
2867 common in the output file. */
2868 if (sym->st_shndx == SHN_COMMON && strcmp (input_sec->name, ".scommon") == 0)
2869 sym->st_shndx = SHN_SCORE_SCOMMON;
2870
2871 return 1;
2872 }
2873
2874 bfd_boolean
s7_bfd_score_elf_section_from_bfd_section(bfd * abfd ATTRIBUTE_UNUSED,asection * sec,int * retval)2875 s7_bfd_score_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED,
2876 asection *sec,
2877 int *retval)
2878 {
2879 if (strcmp (bfd_section_name (sec), ".scommon") == 0)
2880 {
2881 *retval = SHN_SCORE_SCOMMON;
2882 return TRUE;
2883 }
2884
2885 return FALSE;
2886 }
2887
2888 /* Adjust a symbol defined by a dynamic object and referenced by a
2889 regular object. The current definition is in some section of the
2890 dynamic object, but we're not including those sections. We have to
2891 change the definition to something the rest of the link can understand. */
2892
2893 bfd_boolean
s7_bfd_score_elf_adjust_dynamic_symbol(struct bfd_link_info * info,struct elf_link_hash_entry * h)2894 s7_bfd_score_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
2895 struct elf_link_hash_entry *h)
2896 {
2897 bfd *dynobj;
2898 struct score_elf_link_hash_entry *hscore;
2899 asection *s;
2900
2901 dynobj = elf_hash_table (info)->dynobj;
2902
2903 /* Make sure we know what is going on here. */
2904 BFD_ASSERT (dynobj != NULL
2905 && (h->needs_plt
2906 || h->is_weakalias
2907 || (h->def_dynamic && h->ref_regular && !h->def_regular)));
2908
2909 /* If this symbol is defined in a dynamic object, we need to copy
2910 any R_SCORE_ABS32 or R_SCORE_REL32 relocs against it into the output
2911 file. */
2912 hscore = (struct score_elf_link_hash_entry *) h;
2913 if (!bfd_link_relocatable (info)
2914 && hscore->possibly_dynamic_relocs != 0
2915 && (h->root.type == bfd_link_hash_defweak || !h->def_regular))
2916 {
2917 score_elf_allocate_dynamic_relocations (dynobj, hscore->possibly_dynamic_relocs);
2918 if (hscore->readonly_reloc)
2919 /* We tell the dynamic linker that there are relocations
2920 against the text segment. */
2921 info->flags |= DF_TEXTREL;
2922 }
2923
2924 /* For a function, create a stub, if allowed. */
2925 if (!hscore->no_fn_stub && h->needs_plt)
2926 {
2927 if (!elf_hash_table (info)->dynamic_sections_created)
2928 return TRUE;
2929
2930 /* If this symbol is not defined in a regular file, then set
2931 the symbol to the stub location. This is required to make
2932 function pointers compare as equal between the normal
2933 executable and the shared library. */
2934 if (!h->def_regular)
2935 {
2936 /* We need .stub section. */
2937 s = bfd_get_linker_section (dynobj, SCORE_ELF_STUB_SECTION_NAME);
2938 BFD_ASSERT (s != NULL);
2939
2940 h->root.u.def.section = s;
2941 h->root.u.def.value = s->size;
2942
2943 /* XXX Write this stub address somewhere. */
2944 h->plt.offset = s->size;
2945
2946 /* Make room for this stub code. */
2947 s->size += SCORE_FUNCTION_STUB_SIZE;
2948
2949 /* The last half word of the stub will be filled with the index
2950 of this symbol in .dynsym section. */
2951 return TRUE;
2952 }
2953 }
2954 else if ((h->type == STT_FUNC) && !h->needs_plt)
2955 {
2956 /* This will set the entry for this symbol in the GOT to 0, and
2957 the dynamic linker will take care of this. */
2958 h->root.u.def.value = 0;
2959 return TRUE;
2960 }
2961
2962 /* If this is a weak symbol, and there is a real definition, the
2963 processor independent code will have arranged for us to see the
2964 real definition first, and we can just use the same value. */
2965 if (h->is_weakalias)
2966 {
2967 struct elf_link_hash_entry *def = weakdef (h);
2968 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
2969 h->root.u.def.section = def->root.u.def.section;
2970 h->root.u.def.value = def->root.u.def.value;
2971 return TRUE;
2972 }
2973
2974 /* This is a reference to a symbol defined by a dynamic object which
2975 is not a function. */
2976 return TRUE;
2977 }
2978
2979 /* This function is called after all the input files have been read,
2980 and the input sections have been assigned to output sections. */
2981
2982 bfd_boolean
s7_bfd_score_elf_always_size_sections(bfd * output_bfd,struct bfd_link_info * info)2983 s7_bfd_score_elf_always_size_sections (bfd *output_bfd,
2984 struct bfd_link_info *info)
2985 {
2986 bfd *dynobj;
2987 asection *s;
2988 struct score_got_info *g;
2989 int i;
2990 bfd_size_type loadable_size = 0;
2991 bfd_size_type local_gotno;
2992 bfd *sub;
2993
2994 dynobj = elf_hash_table (info)->dynobj;
2995 if (dynobj == NULL)
2996 /* Relocatable links don't have it. */
2997 return TRUE;
2998
2999 g = score_elf_got_info (dynobj, &s);
3000 if (s == NULL)
3001 return TRUE;
3002
3003 /* Calculate the total loadable size of the output. That will give us the
3004 maximum number of GOT_PAGE entries required. */
3005 for (sub = info->input_bfds; sub; sub = sub->link.next)
3006 {
3007 asection *subsection;
3008
3009 for (subsection = sub->sections;
3010 subsection;
3011 subsection = subsection->next)
3012 {
3013 if ((subsection->flags & SEC_ALLOC) == 0)
3014 continue;
3015 loadable_size += ((subsection->size + 0xf)
3016 &~ (bfd_size_type) 0xf);
3017 }
3018 }
3019
3020 /* There has to be a global GOT entry for every symbol with
3021 a dynamic symbol table index of DT_SCORE_GOTSYM or
3022 higher. Therefore, it make sense to put those symbols
3023 that need GOT entries at the end of the symbol table. We
3024 do that here. */
3025 if (! score_elf_sort_hash_table (info, 1))
3026 return FALSE;
3027
3028 if (g->global_gotsym != NULL)
3029 i = elf_hash_table (info)->dynsymcount - g->global_gotsym->dynindx;
3030 else
3031 /* If there are no global symbols, or none requiring
3032 relocations, then GLOBAL_GOTSYM will be NULL. */
3033 i = 0;
3034
3035 /* In the worst case, we'll get one stub per dynamic symbol. */
3036 loadable_size += SCORE_FUNCTION_STUB_SIZE * i;
3037
3038 /* Assume there are two loadable segments consisting of
3039 contiguous sections. Is 5 enough? */
3040 local_gotno = (loadable_size >> 16) + 5;
3041
3042 g->local_gotno += local_gotno;
3043 s->size += g->local_gotno * SCORE_ELF_GOT_SIZE (output_bfd);
3044
3045 g->global_gotno = i;
3046 s->size += i * SCORE_ELF_GOT_SIZE (output_bfd);
3047
3048 score_elf_resolve_final_got_entries (g);
3049
3050 if (s->size > SCORE_ELF_GOT_MAX_SIZE (output_bfd))
3051 {
3052 /* Fixme. Error message or Warning message should be issued here. */
3053 }
3054
3055 return TRUE;
3056 }
3057
3058 /* Set the sizes of the dynamic sections. */
3059
3060 bfd_boolean
s7_bfd_score_elf_size_dynamic_sections(bfd * output_bfd,struct bfd_link_info * info)3061 s7_bfd_score_elf_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
3062 {
3063 bfd *dynobj;
3064 asection *s;
3065 bfd_boolean reltext;
3066
3067 dynobj = elf_hash_table (info)->dynobj;
3068 BFD_ASSERT (dynobj != NULL);
3069
3070 if (elf_hash_table (info)->dynamic_sections_created)
3071 {
3072 /* Set the contents of the .interp section to the interpreter. */
3073 if (bfd_link_executable (info) && !info->nointerp)
3074 {
3075 s = bfd_get_linker_section (dynobj, ".interp");
3076 BFD_ASSERT (s != NULL);
3077 s->size = strlen (ELF_DYNAMIC_INTERPRETER) + 1;
3078 s->contents = (bfd_byte *) ELF_DYNAMIC_INTERPRETER;
3079 }
3080 }
3081
3082 /* The check_relocs and adjust_dynamic_symbol entry points have
3083 determined the sizes of the various dynamic sections. Allocate
3084 memory for them. */
3085 reltext = FALSE;
3086 for (s = dynobj->sections; s != NULL; s = s->next)
3087 {
3088 const char *name;
3089
3090 if ((s->flags & SEC_LINKER_CREATED) == 0)
3091 continue;
3092
3093 /* It's OK to base decisions on the section name, because none
3094 of the dynobj section names depend upon the input files. */
3095 name = bfd_section_name (s);
3096
3097 if (CONST_STRNEQ (name, ".rel"))
3098 {
3099 if (s->size == 0)
3100 {
3101 /* We only strip the section if the output section name
3102 has the same name. Otherwise, there might be several
3103 input sections for this output section. FIXME: This
3104 code is probably not needed these days anyhow, since
3105 the linker now does not create empty output sections. */
3106 if (s->output_section != NULL
3107 && strcmp (name,
3108 bfd_section_name (s->output_section)) == 0)
3109 s->flags |= SEC_EXCLUDE;
3110 }
3111 else
3112 {
3113 const char *outname;
3114 asection *target;
3115
3116 /* If this relocation section applies to a read only
3117 section, then we probably need a DT_TEXTREL entry.
3118 If the relocation section is .rel.dyn, we always
3119 assert a DT_TEXTREL entry rather than testing whether
3120 there exists a relocation to a read only section or
3121 not. */
3122 outname = bfd_section_name (s->output_section);
3123 target = bfd_get_section_by_name (output_bfd, outname + 4);
3124 if ((target != NULL
3125 && (target->flags & SEC_READONLY) != 0
3126 && (target->flags & SEC_ALLOC) != 0) || strcmp (outname, ".rel.dyn") == 0)
3127 reltext = TRUE;
3128
3129 /* We use the reloc_count field as a counter if we need
3130 to copy relocs into the output file. */
3131 if (strcmp (name, ".rel.dyn") != 0)
3132 s->reloc_count = 0;
3133 }
3134 }
3135 else if (CONST_STRNEQ (name, ".got"))
3136 {
3137 /* s7_bfd_score_elf_always_size_sections() has already done
3138 most of the work, but some symbols may have been mapped
3139 to versions that we must now resolve in the got_entries
3140 hash tables. */
3141 }
3142 else if (strcmp (name, SCORE_ELF_STUB_SECTION_NAME) == 0)
3143 {
3144 /* IRIX rld assumes that the function stub isn't at the end
3145 of .text section. So put a dummy. XXX */
3146 s->size += SCORE_FUNCTION_STUB_SIZE;
3147 }
3148 else if (! CONST_STRNEQ (name, ".init"))
3149 {
3150 /* It's not one of our sections, so don't allocate space. */
3151 continue;
3152 }
3153
3154 /* Allocate memory for the section contents. */
3155 s->contents = bfd_zalloc (dynobj, s->size);
3156 if (s->contents == NULL && s->size != 0)
3157 {
3158 bfd_set_error (bfd_error_no_memory);
3159 return FALSE;
3160 }
3161 }
3162
3163 if (elf_hash_table (info)->dynamic_sections_created)
3164 {
3165 /* Add some entries to the .dynamic section. We fill in the
3166 values later, in s7_bfd_score_elf_finish_dynamic_sections, but we
3167 must add the entries now so that we get the correct size for
3168 the .dynamic section. The DT_DEBUG entry is filled in by the
3169 dynamic linker and used by the debugger. */
3170
3171 if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_DEBUG, 0))
3172 return FALSE;
3173
3174 if (reltext)
3175 info->flags |= DF_TEXTREL;
3176
3177 if ((info->flags & DF_TEXTREL) != 0)
3178 {
3179 if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_TEXTREL, 0))
3180 return FALSE;
3181 }
3182
3183 if (! SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_PLTGOT, 0))
3184 return FALSE;
3185
3186 if (score_elf_rel_dyn_section (dynobj, FALSE))
3187 {
3188 if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_REL, 0))
3189 return FALSE;
3190
3191 if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_RELSZ, 0))
3192 return FALSE;
3193
3194 if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_RELENT, 0))
3195 return FALSE;
3196 }
3197
3198 if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_SCORE_BASE_ADDRESS, 0))
3199 return FALSE;
3200
3201 if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_SCORE_LOCAL_GOTNO, 0))
3202 return FALSE;
3203
3204 if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_SCORE_SYMTABNO, 0))
3205 return FALSE;
3206
3207 if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_SCORE_UNREFEXTNO, 0))
3208 return FALSE;
3209
3210 if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_SCORE_GOTSYM, 0))
3211 return FALSE;
3212
3213 if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_SCORE_HIPAGENO, 0))
3214 return FALSE;
3215 }
3216
3217 return TRUE;
3218 }
3219
3220 bfd_boolean
s7_bfd_score_elf_create_dynamic_sections(bfd * abfd,struct bfd_link_info * info)3221 s7_bfd_score_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3222 {
3223 struct elf_link_hash_entry *h;
3224 struct bfd_link_hash_entry *bh;
3225 flagword flags;
3226 asection *s;
3227
3228 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3229 | SEC_LINKER_CREATED | SEC_READONLY);
3230
3231 /* ABI requests the .dynamic section to be read only. */
3232 s = bfd_get_linker_section (abfd, ".dynamic");
3233 if (s != NULL)
3234 {
3235 if (!bfd_set_section_flags (s, flags))
3236 return FALSE;
3237 }
3238
3239 /* We need to create .got section. */
3240 if (!score_elf_create_got_section (abfd, info, FALSE))
3241 return FALSE;
3242
3243 if (!score_elf_rel_dyn_section (elf_hash_table (info)->dynobj, TRUE))
3244 return FALSE;
3245
3246 /* Create .stub section. */
3247 if (bfd_get_linker_section (abfd, SCORE_ELF_STUB_SECTION_NAME) == NULL)
3248 {
3249 s = bfd_make_section_anyway_with_flags (abfd, SCORE_ELF_STUB_SECTION_NAME,
3250 flags | SEC_CODE);
3251 if (s == NULL
3252 || !bfd_set_section_alignment (s, 2))
3253
3254 return FALSE;
3255 }
3256
3257 if (!bfd_link_pic (info))
3258 {
3259 const char *name;
3260
3261 name = "_DYNAMIC_LINK";
3262 bh = NULL;
3263 if (!(_bfd_generic_link_add_one_symbol
3264 (info, abfd, name, BSF_GLOBAL, bfd_abs_section_ptr,
3265 (bfd_vma) 0, NULL, FALSE, get_elf_backend_data (abfd)->collect, &bh)))
3266 return FALSE;
3267
3268 h = (struct elf_link_hash_entry *) bh;
3269 h->non_elf = 0;
3270 h->def_regular = 1;
3271 h->type = STT_SECTION;
3272
3273 if (!bfd_elf_link_record_dynamic_symbol (info, h))
3274 return FALSE;
3275 }
3276
3277 return TRUE;
3278 }
3279
3280
3281 /* Finish up dynamic symbol handling. We set the contents of various
3282 dynamic sections here. */
3283
3284 bfd_boolean
s7_bfd_score_elf_finish_dynamic_symbol(bfd * output_bfd,struct bfd_link_info * info,struct elf_link_hash_entry * h,Elf_Internal_Sym * sym)3285 s7_bfd_score_elf_finish_dynamic_symbol (bfd *output_bfd,
3286 struct bfd_link_info *info,
3287 struct elf_link_hash_entry *h,
3288 Elf_Internal_Sym *sym)
3289 {
3290 bfd *dynobj;
3291 asection *sgot;
3292 struct score_got_info *g;
3293 const char *name;
3294
3295 dynobj = elf_hash_table (info)->dynobj;
3296
3297 if (h->plt.offset != MINUS_ONE)
3298 {
3299 asection *s;
3300 bfd_byte stub[SCORE_FUNCTION_STUB_SIZE];
3301
3302 /* This symbol has a stub. Set it up. */
3303 BFD_ASSERT (h->dynindx != -1);
3304
3305 s = bfd_get_linker_section (dynobj, SCORE_ELF_STUB_SECTION_NAME);
3306 BFD_ASSERT (s != NULL);
3307
3308 /* FIXME: Can h->dynindex be more than 64K? */
3309 if (h->dynindx & 0xffff0000)
3310 return FALSE;
3311
3312 /* Fill the stub. */
3313 bfd_put_32 (output_bfd, STUB_LW, stub);
3314 bfd_put_32 (output_bfd, STUB_MOVE, stub + 4);
3315 bfd_put_32 (output_bfd, STUB_LI16 | (h->dynindx << 1), stub + 8);
3316 bfd_put_32 (output_bfd, STUB_BRL, stub + 12);
3317
3318 BFD_ASSERT (h->plt.offset <= s->size);
3319 memcpy (s->contents + h->plt.offset, stub, SCORE_FUNCTION_STUB_SIZE);
3320
3321 /* Mark the symbol as undefined. plt.offset != -1 occurs
3322 only for the referenced symbol. */
3323 sym->st_shndx = SHN_UNDEF;
3324
3325 /* The run-time linker uses the st_value field of the symbol
3326 to reset the global offset table entry for this external
3327 to its stub address when unlinking a shared object. */
3328 sym->st_value = (s->output_section->vma + s->output_offset + h->plt.offset);
3329 }
3330
3331 BFD_ASSERT (h->dynindx != -1 || h->forced_local);
3332
3333 sgot = score_elf_got_section (dynobj, FALSE);
3334 BFD_ASSERT (sgot != NULL);
3335 BFD_ASSERT (score_elf_section_data (sgot) != NULL);
3336 g = score_elf_section_data (sgot)->u.got_info;
3337 BFD_ASSERT (g != NULL);
3338
3339 /* Run through the global symbol table, creating GOT entries for all
3340 the symbols that need them. */
3341 if (g->global_gotsym != NULL && h->dynindx >= g->global_gotsym->dynindx)
3342 {
3343 bfd_vma offset;
3344 bfd_vma value;
3345
3346 value = sym->st_value;
3347 offset = score_elf_global_got_index (dynobj, h);
3348 bfd_put_32 (output_bfd, value, sgot->contents + offset);
3349 }
3350
3351 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
3352 name = h->root.root.string;
3353 if (h == elf_hash_table (info)->hdynamic
3354 || h == elf_hash_table (info)->hgot)
3355 sym->st_shndx = SHN_ABS;
3356 else if (strcmp (name, "_DYNAMIC_LINK") == 0)
3357 {
3358 sym->st_shndx = SHN_ABS;
3359 sym->st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
3360 sym->st_value = 1;
3361 }
3362 else if (strcmp (name, GP_DISP_LABEL) == 0)
3363 {
3364 sym->st_shndx = SHN_ABS;
3365 sym->st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
3366 sym->st_value = elf_gp (output_bfd);
3367 }
3368
3369 return TRUE;
3370 }
3371
3372 /* Finish up the dynamic sections. */
3373
3374 bfd_boolean
s7_bfd_score_elf_finish_dynamic_sections(bfd * output_bfd,struct bfd_link_info * info)3375 s7_bfd_score_elf_finish_dynamic_sections (bfd *output_bfd,
3376 struct bfd_link_info *info)
3377 {
3378 bfd *dynobj;
3379 asection *sdyn;
3380 asection *sgot;
3381 asection *s;
3382 struct score_got_info *g;
3383
3384 dynobj = elf_hash_table (info)->dynobj;
3385
3386 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3387
3388 sgot = score_elf_got_section (dynobj, FALSE);
3389 if (sgot == NULL)
3390 g = NULL;
3391 else
3392 {
3393 BFD_ASSERT (score_elf_section_data (sgot) != NULL);
3394 g = score_elf_section_data (sgot)->u.got_info;
3395 BFD_ASSERT (g != NULL);
3396 }
3397
3398 if (elf_hash_table (info)->dynamic_sections_created)
3399 {
3400 bfd_byte *b;
3401
3402 BFD_ASSERT (sdyn != NULL);
3403 BFD_ASSERT (g != NULL);
3404
3405 for (b = sdyn->contents;
3406 b < sdyn->contents + sdyn->size;
3407 b += SCORE_ELF_DYN_SIZE (dynobj))
3408 {
3409 Elf_Internal_Dyn dyn;
3410 const char *name;
3411 size_t elemsize;
3412 bfd_boolean swap_out_p;
3413
3414 /* Read in the current dynamic entry. */
3415 (*get_elf_backend_data (dynobj)->s->swap_dyn_in) (dynobj, b, &dyn);
3416
3417 /* Assume that we're going to modify it and write it out. */
3418 swap_out_p = TRUE;
3419
3420 switch (dyn.d_tag)
3421 {
3422 case DT_RELENT:
3423 dyn.d_un.d_val = SCORE_ELF_REL_SIZE (dynobj);
3424 break;
3425
3426 case DT_STRSZ:
3427 /* Rewrite DT_STRSZ. */
3428 dyn.d_un.d_val
3429 = _bfd_elf_strtab_size (elf_hash_table (info)->dynstr);
3430 break;
3431
3432 case DT_PLTGOT:
3433 s = elf_hash_table (info)->sgot;
3434 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3435 break;
3436
3437 case DT_SCORE_BASE_ADDRESS:
3438 s = output_bfd->sections;
3439 BFD_ASSERT (s != NULL);
3440 dyn.d_un.d_ptr = s->vma & ~(bfd_vma) 0xffff;
3441 break;
3442
3443 case DT_SCORE_LOCAL_GOTNO:
3444 dyn.d_un.d_val = g->local_gotno;
3445 break;
3446
3447 case DT_SCORE_UNREFEXTNO:
3448 /* The index into the dynamic symbol table which is the
3449 entry of the first external symbol that is not
3450 referenced within the same object. */
3451 dyn.d_un.d_val = bfd_count_sections (output_bfd) + 1;
3452 break;
3453
3454 case DT_SCORE_GOTSYM:
3455 if (g->global_gotsym)
3456 {
3457 dyn.d_un.d_val = g->global_gotsym->dynindx;
3458 break;
3459 }
3460 /* In case if we don't have global got symbols we default
3461 to setting DT_SCORE_GOTSYM to the same value as
3462 DT_SCORE_SYMTABNO. */
3463 /* Fall through. */
3464
3465 case DT_SCORE_SYMTABNO:
3466 name = ".dynsym";
3467 elemsize = SCORE_ELF_SYM_SIZE (output_bfd);
3468 s = bfd_get_linker_section (dynobj, name);
3469 dyn.d_un.d_val = s->size / elemsize;
3470 break;
3471
3472 case DT_SCORE_HIPAGENO:
3473 dyn.d_un.d_val = g->local_gotno - SCORE_RESERVED_GOTNO;
3474 break;
3475
3476 default:
3477 swap_out_p = FALSE;
3478 break;
3479 }
3480
3481 if (swap_out_p)
3482 (*get_elf_backend_data (dynobj)->s->swap_dyn_out) (dynobj, &dyn, b);
3483 }
3484 }
3485
3486 /* The first entry of the global offset table will be filled at
3487 runtime. The second entry will be used by some runtime loaders.
3488 This isn't the case of IRIX rld. */
3489 if (sgot != NULL && sgot->size > 0)
3490 {
3491 bfd_put_32 (output_bfd, 0, sgot->contents);
3492 bfd_put_32 (output_bfd, 0x80000000, sgot->contents + SCORE_ELF_GOT_SIZE (output_bfd));
3493 }
3494
3495 if (sgot != NULL)
3496 elf_section_data (sgot->output_section)->this_hdr.sh_entsize
3497 = SCORE_ELF_GOT_SIZE (output_bfd);
3498
3499
3500 /* We need to sort the entries of the dynamic relocation section. */
3501 s = score_elf_rel_dyn_section (dynobj, FALSE);
3502
3503 if (s != NULL && s->size > (bfd_vma)2 * SCORE_ELF_REL_SIZE (output_bfd))
3504 {
3505 reldyn_sorting_bfd = output_bfd;
3506 qsort ((Elf32_External_Rel *) s->contents + 1, s->reloc_count - 1,
3507 sizeof (Elf32_External_Rel), score_elf_sort_dynamic_relocs);
3508 }
3509
3510 return TRUE;
3511 }
3512
3513 /* This function set up the ELF section header for a BFD section in preparation for writing
3514 it out. This is where the flags and type fields are set for unusual sections. */
3515
3516 bfd_boolean
s7_bfd_score_elf_fake_sections(bfd * abfd ATTRIBUTE_UNUSED,Elf_Internal_Shdr * hdr,asection * sec)3517 s7_bfd_score_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
3518 Elf_Internal_Shdr *hdr,
3519 asection *sec)
3520 {
3521 const char *name;
3522
3523 name = bfd_section_name (sec);
3524
3525 if (strcmp (name, ".got") == 0
3526 || strcmp (name, ".srdata") == 0
3527 || strcmp (name, ".sdata") == 0
3528 || strcmp (name, ".sbss") == 0)
3529 hdr->sh_flags |= SHF_SCORE_GPREL;
3530
3531 return TRUE;
3532 }
3533
3534 /* This function do additional processing on the ELF section header before writing
3535 it out. This is used to set the flags and type fields for some sections. */
3536
3537 /* assign_file_positions_except_relocs() check section flag and if it is allocatable,
3538 warning message will be issued. backend_fake_section is called before
3539 assign_file_positions_except_relocs(); backend_section_processing after it. so, we
3540 modify section flag there, but not backend_fake_section. */
3541
3542 bfd_boolean
s7_bfd_score_elf_section_processing(bfd * abfd ATTRIBUTE_UNUSED,Elf_Internal_Shdr * hdr)3543 s7_bfd_score_elf_section_processing (bfd *abfd ATTRIBUTE_UNUSED, Elf_Internal_Shdr *hdr)
3544 {
3545 if (hdr->bfd_section != NULL)
3546 {
3547 const char *name = bfd_section_name (hdr->bfd_section);
3548
3549 if (strcmp (name, ".sdata") == 0)
3550 {
3551 hdr->sh_flags |= SHF_ALLOC | SHF_WRITE | SHF_SCORE_GPREL;
3552 hdr->sh_type = SHT_PROGBITS;
3553 }
3554 else if (strcmp (name, ".sbss") == 0)
3555 {
3556 hdr->sh_flags |= SHF_ALLOC | SHF_WRITE | SHF_SCORE_GPREL;
3557 hdr->sh_type = SHT_NOBITS;
3558 }
3559 else if (strcmp (name, ".srdata") == 0)
3560 {
3561 hdr->sh_flags |= SHF_ALLOC | SHF_SCORE_GPREL;
3562 hdr->sh_type = SHT_PROGBITS;
3563 }
3564 }
3565
3566 return TRUE;
3567 }
3568
3569 bfd_boolean
s7_bfd_score_elf_write_section(bfd * output_bfd,asection * sec,bfd_byte * contents)3570 s7_bfd_score_elf_write_section (bfd *output_bfd, asection *sec, bfd_byte *contents)
3571 {
3572 bfd_byte *to, *from, *end;
3573 int i;
3574
3575 if (strcmp (sec->name, ".pdr") != 0)
3576 return FALSE;
3577
3578 if (score_elf_section_data (sec)->u.tdata == NULL)
3579 return FALSE;
3580
3581 to = contents;
3582 end = contents + sec->size;
3583 for (from = contents, i = 0; from < end; from += PDR_SIZE, i++)
3584 {
3585 if ((score_elf_section_data (sec)->u.tdata)[i] == 1)
3586 continue;
3587
3588 if (to != from)
3589 memcpy (to, from, PDR_SIZE);
3590
3591 to += PDR_SIZE;
3592 }
3593 bfd_set_section_contents (output_bfd, sec->output_section, contents,
3594 (file_ptr) sec->output_offset, sec->size);
3595
3596 return TRUE;
3597 }
3598
3599 /* Copy data from a SCORE ELF indirect symbol to its direct symbol, hiding the old
3600 indirect symbol. Process additional relocation information. */
3601
3602 void
s7_bfd_score_elf_copy_indirect_symbol(struct bfd_link_info * info,struct elf_link_hash_entry * dir,struct elf_link_hash_entry * ind)3603 s7_bfd_score_elf_copy_indirect_symbol (struct bfd_link_info *info,
3604 struct elf_link_hash_entry *dir,
3605 struct elf_link_hash_entry *ind)
3606 {
3607 struct score_elf_link_hash_entry *dirscore, *indscore;
3608
3609 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
3610
3611 if (ind->root.type != bfd_link_hash_indirect)
3612 return;
3613
3614 dirscore = (struct score_elf_link_hash_entry *) dir;
3615 indscore = (struct score_elf_link_hash_entry *) ind;
3616 dirscore->possibly_dynamic_relocs += indscore->possibly_dynamic_relocs;
3617
3618 if (indscore->readonly_reloc)
3619 dirscore->readonly_reloc = TRUE;
3620
3621 if (indscore->no_fn_stub)
3622 dirscore->no_fn_stub = TRUE;
3623 }
3624
3625 /* Remove information about discarded functions from other sections which mention them. */
3626
3627 bfd_boolean
s7_bfd_score_elf_discard_info(bfd * abfd,struct elf_reloc_cookie * cookie,struct bfd_link_info * info)3628 s7_bfd_score_elf_discard_info (bfd *abfd,
3629 struct elf_reloc_cookie *cookie,
3630 struct bfd_link_info *info)
3631 {
3632 asection *o;
3633 bfd_boolean ret = FALSE;
3634 unsigned char *tdata;
3635 size_t i, skip;
3636
3637 o = bfd_get_section_by_name (abfd, ".pdr");
3638 if ((!o) || (o->size == 0) || (o->size % PDR_SIZE != 0)
3639 || (o->output_section != NULL && bfd_is_abs_section (o->output_section)))
3640 return FALSE;
3641
3642 tdata = bfd_zmalloc (o->size / PDR_SIZE);
3643 if (!tdata)
3644 return FALSE;
3645
3646 cookie->rels = _bfd_elf_link_read_relocs (abfd, o, NULL, NULL, info->keep_memory);
3647 if (!cookie->rels)
3648 {
3649 free (tdata);
3650 return FALSE;
3651 }
3652
3653 cookie->rel = cookie->rels;
3654 cookie->relend = cookie->rels + o->reloc_count;
3655
3656 for (i = 0, skip = 0; i < o->size; i++)
3657 {
3658 if (bfd_elf_reloc_symbol_deleted_p (i * PDR_SIZE, cookie))
3659 {
3660 tdata[i] = 1;
3661 skip++;
3662 }
3663 }
3664
3665 if (skip != 0)
3666 {
3667 score_elf_section_data (o)->u.tdata = tdata;
3668 o->size -= skip * PDR_SIZE;
3669 ret = TRUE;
3670 }
3671 else
3672 free (tdata);
3673
3674 if (!info->keep_memory)
3675 free (cookie->rels);
3676
3677 return ret;
3678 }
3679
3680 /* Signal that discard_info() has removed the discarded relocations for this section. */
3681
3682 bfd_boolean
s7_bfd_score_elf_ignore_discarded_relocs(asection * sec)3683 s7_bfd_score_elf_ignore_discarded_relocs (asection *sec)
3684 {
3685 if (strcmp (sec->name, ".pdr") == 0)
3686 return TRUE;
3687 return FALSE;
3688 }
3689
3690 /* Return the section that should be marked against GC for a given
3691 relocation. */
3692
3693 asection *
s7_bfd_score_elf_gc_mark_hook(asection * sec,struct bfd_link_info * info,Elf_Internal_Rela * rel,struct elf_link_hash_entry * h,Elf_Internal_Sym * sym)3694 s7_bfd_score_elf_gc_mark_hook (asection *sec,
3695 struct bfd_link_info *info,
3696 Elf_Internal_Rela *rel,
3697 struct elf_link_hash_entry *h,
3698 Elf_Internal_Sym *sym)
3699 {
3700 if (h != NULL)
3701 switch (ELF32_R_TYPE (rel->r_info))
3702 {
3703 case R_SCORE_GNU_VTINHERIT:
3704 case R_SCORE_GNU_VTENTRY:
3705 return NULL;
3706 }
3707
3708 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
3709 }
3710
3711 /* Support for core dump NOTE sections. */
3712
3713 bfd_boolean
s7_bfd_score_elf_grok_prstatus(bfd * abfd,Elf_Internal_Note * note)3714 s7_bfd_score_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
3715 {
3716 int offset;
3717 unsigned int raw_size;
3718
3719 switch (note->descsz)
3720 {
3721 default:
3722 return FALSE;
3723 case 272: /* Linux/Score elf_prstatus */
3724
3725 /* pr_cursig */
3726 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
3727
3728 /* pr_pid */
3729 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
3730
3731 /* pr_reg */
3732 offset = 72;
3733
3734 /* sizeof(elf_gregset_t) */
3735 raw_size = 196;
3736
3737 break;
3738 }
3739
3740 /* Make a ".reg/999" section. */
3741 return _bfd_elfcore_make_pseudosection (abfd, ".reg", raw_size,
3742 note->descpos + offset);
3743 }
3744
3745 bfd_boolean
s7_bfd_score_elf_grok_psinfo(bfd * abfd,Elf_Internal_Note * note)3746 s7_bfd_score_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
3747 {
3748 switch (note->descsz)
3749 {
3750 default:
3751 return FALSE;
3752
3753 case 128: /* Linux/Score elf_prpsinfo. */
3754 /* pr_fname */
3755 elf_tdata (abfd)->core->program
3756 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
3757
3758 /* pr_psargs */
3759 elf_tdata (abfd)->core->command
3760 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
3761 break;
3762 }
3763
3764 /* Note that for some reason, a spurious space is tacked
3765 onto the end of the args in some (at least one anyway)
3766 implementations, so strip it off if it exists. */
3767
3768 {
3769 char *command = elf_tdata (abfd)->core->command;
3770 int n = strlen (command);
3771
3772 if (0 < n && command[n - 1] == ' ')
3773 command[n - 1] = '\0';
3774 }
3775
3776 return TRUE;
3777 }
3778
3779
3780 /* Score BFD functions. */
3781
3782 reloc_howto_type *
s7_elf32_score_reloc_type_lookup(bfd * abfd ATTRIBUTE_UNUSED,bfd_reloc_code_real_type code)3783 s7_elf32_score_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, bfd_reloc_code_real_type code)
3784 {
3785 unsigned int i;
3786
3787 for (i = 0; i < ARRAY_SIZE (elf32_score_reloc_map); i++)
3788 if (elf32_score_reloc_map[i].bfd_reloc_val == code)
3789 return &elf32_score_howto_table[elf32_score_reloc_map[i].elf_reloc_val];
3790
3791 return NULL;
3792 }
3793
3794 bfd_boolean
s7_elf32_score_print_private_bfd_data(bfd * abfd,void * ptr)3795 s7_elf32_score_print_private_bfd_data (bfd *abfd, void * ptr)
3796 {
3797 FILE *file = (FILE *) ptr;
3798
3799 BFD_ASSERT (abfd != NULL && ptr != NULL);
3800
3801 /* Print normal ELF private data. */
3802 _bfd_elf_print_private_bfd_data (abfd, ptr);
3803
3804 /* xgettext:c-format */
3805 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
3806 if (elf_elfheader (abfd)->e_flags & EF_SCORE_PIC)
3807 {
3808 fprintf (file, _(" [pic]"));
3809 }
3810 if (elf_elfheader (abfd)->e_flags & EF_SCORE_FIXDEP)
3811 {
3812 fprintf (file, _(" [fix dep]"));
3813 }
3814 fputc ('\n', file);
3815
3816 return TRUE;
3817 }
3818
3819 bfd_boolean
s7_elf32_score_merge_private_bfd_data(bfd * ibfd,struct bfd_link_info * info)3820 s7_elf32_score_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
3821 {
3822 bfd *obfd = info->output_bfd;
3823 flagword in_flags;
3824 flagword out_flags;
3825
3826 if (!_bfd_generic_verify_endian_match (ibfd, info))
3827 return FALSE;
3828
3829 /* FIXME: What should be checked when linking shared libraries? */
3830 if ((ibfd->flags & DYNAMIC) != 0)
3831 return TRUE;
3832
3833 in_flags = elf_elfheader (ibfd)->e_flags;
3834 out_flags = elf_elfheader (obfd)->e_flags;
3835
3836 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3837 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3838 return TRUE;
3839
3840 in_flags = elf_elfheader (ibfd)->e_flags;
3841 out_flags = elf_elfheader (obfd)->e_flags;
3842
3843 if (! elf_flags_init (obfd))
3844 {
3845 elf_flags_init (obfd) = TRUE;
3846 elf_elfheader (obfd)->e_flags = in_flags;
3847
3848 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
3849 && bfd_get_arch_info (obfd)->the_default)
3850 {
3851 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
3852 }
3853
3854 return TRUE;
3855 }
3856
3857 if (((in_flags & EF_SCORE_PIC) != 0) != ((out_flags & EF_SCORE_PIC) != 0))
3858 {
3859 _bfd_error_handler (_("%pB: warning: linking PIC files with non-PIC files"), ibfd);
3860 }
3861
3862 /* Maybe dependency fix compatibility should be checked here. */
3863 return TRUE;
3864 }
3865
3866 bfd_boolean
s7_elf32_score_new_section_hook(bfd * abfd,asection * sec)3867 s7_elf32_score_new_section_hook (bfd *abfd, asection *sec)
3868 {
3869 struct _score_elf_section_data *sdata;
3870 size_t amt = sizeof (*sdata);
3871
3872 sdata = bfd_zalloc (abfd, amt);
3873 if (sdata == NULL)
3874 return FALSE;
3875 sec->used_by_bfd = sdata;
3876
3877 return _bfd_elf_new_section_hook (abfd, sec);
3878 }
3879
3880 #define elf_backend_omit_section_dynsym _bfd_elf_omit_section_dynsym_all
3881