elf32-score7.c revision 1.1.1.3
1 /* 32-bit ELF support for S+core. 2 Copyright (C) 2009-2015 Free Software Foundation, Inc. 3 Contributed by 4 Brain.lin (brain.lin (at) sunplusct.com) 5 Mei Ligang (ligang (at) sunnorth.com.cn) 6 Pei-Lin Tsai (pltsai (at) 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 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 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 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 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 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 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 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 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 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_get_section (symbol)) 501 || bfd_is_com_section (bfd_get_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 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 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 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 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 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 * 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 * 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 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 * 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 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 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 * 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 (dynobj, sreloc, 1118 SCORE_ELF_LOG_FILE_ALIGN (dynobj))) 1119 return NULL; 1120 } 1121 return sreloc; 1122 } 1123 1124 static void 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 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 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 bfd_size_type 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 if (s == NULL 1291 || ! bfd_set_section_alignment (abfd, s, 4)) 1292 return FALSE; 1293 1294 /* Define the symbol _GLOBAL_OFFSET_TABLE_. We don't do this in the 1295 linker script because we don't want to define the symbol if we 1296 are not creating a global offset table. */ 1297 bh = NULL; 1298 if (! (_bfd_generic_link_add_one_symbol 1299 (info, abfd, "_GLOBAL_OFFSET_TABLE_", BSF_GLOBAL, s, 1300 0, NULL, FALSE, get_elf_backend_data (abfd)->collect, &bh))) 1301 return FALSE; 1302 1303 h = (struct elf_link_hash_entry *) bh; 1304 h->non_elf = 0; 1305 h->def_regular = 1; 1306 h->type = STT_OBJECT; 1307 1308 if (bfd_link_pic (info) 1309 && ! bfd_elf_link_record_dynamic_symbol (info, h)) 1310 return FALSE; 1311 1312 amt = sizeof (struct score_got_info); 1313 g = bfd_alloc (abfd, amt); 1314 if (g == NULL) 1315 return FALSE; 1316 1317 g->global_gotsym = NULL; 1318 g->global_gotno = 0; 1319 1320 g->local_gotno = SCORE_RESERVED_GOTNO; 1321 g->assigned_gotno = SCORE_RESERVED_GOTNO; 1322 g->next = NULL; 1323 1324 g->got_entries = htab_try_create (1, score_elf_got_entry_hash, 1325 score_elf_got_entry_eq, NULL); 1326 if (g->got_entries == NULL) 1327 return FALSE; 1328 score_elf_section_data (s)->u.got_info = g; 1329 score_elf_section_data (s)->elf.this_hdr.sh_flags |= SHF_ALLOC | SHF_WRITE | SHF_SCORE_GPREL; 1330 1331 return TRUE; 1332 } 1333 1334 /* Calculate the %high function. */ 1335 1336 static bfd_vma 1337 score_elf_high (bfd_vma value) 1338 { 1339 return ((value + (bfd_vma) 0x8000) >> 16) & 0xffff; 1340 } 1341 1342 /* Create a local GOT entry for VALUE. Return the index of the entry, 1343 or -1 if it could not be created. */ 1344 1345 static struct score_got_entry * 1346 score_elf_create_local_got_entry (bfd *abfd, 1347 bfd *ibfd ATTRIBUTE_UNUSED, 1348 struct score_got_info *gg, 1349 asection *sgot, bfd_vma value, 1350 unsigned long r_symndx ATTRIBUTE_UNUSED, 1351 struct score_elf_link_hash_entry *h ATTRIBUTE_UNUSED, 1352 int r_type ATTRIBUTE_UNUSED) 1353 { 1354 struct score_got_entry entry, **loc; 1355 struct score_got_info *g; 1356 1357 entry.abfd = NULL; 1358 entry.symndx = -1; 1359 entry.d.address = value; 1360 1361 g = gg; 1362 loc = (struct score_got_entry **) htab_find_slot (g->got_entries, &entry, INSERT); 1363 if (*loc) 1364 return *loc; 1365 1366 entry.gotidx = SCORE_ELF_GOT_SIZE (abfd) * g->assigned_gotno++; 1367 1368 *loc = bfd_alloc (abfd, sizeof entry); 1369 1370 if (! *loc) 1371 return NULL; 1372 1373 memcpy (*loc, &entry, sizeof entry); 1374 1375 if (g->assigned_gotno >= g->local_gotno) 1376 { 1377 (*loc)->gotidx = -1; 1378 /* We didn't allocate enough space in the GOT. */ 1379 (*_bfd_error_handler) 1380 (_("not enough GOT space for local GOT entries")); 1381 bfd_set_error (bfd_error_bad_value); 1382 return NULL; 1383 } 1384 1385 bfd_put_32 (abfd, value, (sgot->contents + entry.gotidx)); 1386 1387 return *loc; 1388 } 1389 1390 /* Find a GOT entry whose higher-order 16 bits are the same as those 1391 for value. Return the index into the GOT for this entry. */ 1392 1393 static bfd_vma 1394 score_elf_got16_entry (bfd *abfd, bfd *ibfd, struct bfd_link_info *info, 1395 bfd_vma value, bfd_boolean external) 1396 { 1397 asection *sgot; 1398 struct score_got_info *g; 1399 struct score_got_entry *entry; 1400 1401 if (!external) 1402 { 1403 /* Although the ABI says that it is "the high-order 16 bits" that we 1404 want, it is really the %high value. The complete value is 1405 calculated with a `addiu' of a LO16 relocation, just as with a 1406 HI16/LO16 pair. */ 1407 value = score_elf_high (value) << 16; 1408 } 1409 1410 g = score_elf_got_info (elf_hash_table (info)->dynobj, &sgot); 1411 1412 entry = score_elf_create_local_got_entry (abfd, ibfd, g, sgot, value, 0, NULL, 1413 R_SCORE_GOT15); 1414 if (entry) 1415 return entry->gotidx; 1416 else 1417 return MINUS_ONE; 1418 } 1419 1420 void 1421 s7_bfd_score_elf_hide_symbol (struct bfd_link_info *info, 1422 struct elf_link_hash_entry *entry, 1423 bfd_boolean force_local) 1424 { 1425 bfd *dynobj; 1426 asection *got; 1427 struct score_got_info *g; 1428 struct score_elf_link_hash_entry *h; 1429 1430 h = (struct score_elf_link_hash_entry *) entry; 1431 if (h->forced_local) 1432 return; 1433 h->forced_local = TRUE; 1434 1435 dynobj = elf_hash_table (info)->dynobj; 1436 if (dynobj != NULL && force_local) 1437 { 1438 got = score_elf_got_section (dynobj, FALSE); 1439 if (got == NULL) 1440 return; 1441 g = score_elf_section_data (got)->u.got_info; 1442 1443 if (g->next) 1444 { 1445 struct score_got_entry e; 1446 struct score_got_info *gg = g; 1447 1448 /* Since we're turning what used to be a global symbol into a 1449 local one, bump up the number of local entries of each GOT 1450 that had an entry for it. This will automatically decrease 1451 the number of global entries, since global_gotno is actually 1452 the upper limit of global entries. */ 1453 e.abfd = dynobj; 1454 e.symndx = -1; 1455 e.d.h = h; 1456 1457 for (g = g->next; g != gg; g = g->next) 1458 if (htab_find (g->got_entries, &e)) 1459 { 1460 BFD_ASSERT (g->global_gotno > 0); 1461 g->local_gotno++; 1462 g->global_gotno--; 1463 } 1464 1465 /* If this was a global symbol forced into the primary GOT, we 1466 no longer need an entry for it. We can't release the entry 1467 at this point, but we must at least stop counting it as one 1468 of the symbols that required a forced got entry. */ 1469 if (h->root.got.offset == 2) 1470 { 1471 BFD_ASSERT (gg->assigned_gotno > 0); 1472 gg->assigned_gotno--; 1473 } 1474 } 1475 else if (g->global_gotno == 0 && g->global_gotsym == NULL) 1476 /* If we haven't got through GOT allocation yet, just bump up the 1477 number of local entries, as this symbol won't be counted as 1478 global. */ 1479 g->local_gotno++; 1480 else if (h->root.got.offset == 1) 1481 { 1482 /* If we're past non-multi-GOT allocation and this symbol had 1483 been marked for a global got entry, give it a local entry 1484 instead. */ 1485 BFD_ASSERT (g->global_gotno > 0); 1486 g->local_gotno++; 1487 g->global_gotno--; 1488 } 1489 } 1490 1491 _bfd_elf_link_hash_hide_symbol (info, &h->root, force_local); 1492 } 1493 1494 /* If H is a symbol that needs a global GOT entry, but has a dynamic 1495 symbol table index lower than any we've seen to date, record it for 1496 posterity. */ 1497 1498 static bfd_boolean 1499 score_elf_record_global_got_symbol (struct elf_link_hash_entry *h, 1500 bfd *abfd, 1501 struct bfd_link_info *info, 1502 struct score_got_info *g) 1503 { 1504 struct score_got_entry entry, **loc; 1505 1506 /* A global symbol in the GOT must also be in the dynamic symbol table. */ 1507 if (h->dynindx == -1) 1508 { 1509 switch (ELF_ST_VISIBILITY (h->other)) 1510 { 1511 case STV_INTERNAL: 1512 case STV_HIDDEN: 1513 s7_bfd_score_elf_hide_symbol (info, h, TRUE); 1514 break; 1515 } 1516 if (!bfd_elf_link_record_dynamic_symbol (info, h)) 1517 return FALSE; 1518 } 1519 1520 entry.abfd = abfd; 1521 entry.symndx = -1; 1522 entry.d.h = (struct score_elf_link_hash_entry *) h; 1523 1524 loc = (struct score_got_entry **) htab_find_slot (g->got_entries, &entry, INSERT); 1525 1526 /* If we've already marked this entry as needing GOT space, we don't 1527 need to do it again. */ 1528 if (*loc) 1529 return TRUE; 1530 1531 *loc = bfd_alloc (abfd, sizeof entry); 1532 if (! *loc) 1533 return FALSE; 1534 1535 entry.gotidx = -1; 1536 1537 memcpy (*loc, &entry, sizeof (entry)); 1538 1539 if (h->got.offset != MINUS_ONE) 1540 return TRUE; 1541 1542 /* By setting this to a value other than -1, we are indicating that 1543 there needs to be a GOT entry for H. Avoid using zero, as the 1544 generic ELF copy_indirect_symbol tests for <= 0. */ 1545 h->got.offset = 1; 1546 1547 return TRUE; 1548 } 1549 1550 /* Reserve space in G for a GOT entry containing the value of symbol 1551 SYMNDX in input bfd ABDF, plus ADDEND. */ 1552 1553 static bfd_boolean 1554 score_elf_record_local_got_symbol (bfd *abfd, 1555 long symndx, 1556 bfd_vma addend, 1557 struct score_got_info *g) 1558 { 1559 struct score_got_entry entry, **loc; 1560 1561 entry.abfd = abfd; 1562 entry.symndx = symndx; 1563 entry.d.addend = addend; 1564 loc = (struct score_got_entry **) htab_find_slot (g->got_entries, &entry, INSERT); 1565 1566 if (*loc) 1567 return TRUE; 1568 1569 entry.gotidx = g->local_gotno++; 1570 1571 *loc = bfd_alloc (abfd, sizeof(entry)); 1572 if (! *loc) 1573 return FALSE; 1574 1575 memcpy (*loc, &entry, sizeof (entry)); 1576 1577 return TRUE; 1578 } 1579 1580 /* Returns the GOT offset at which the indicated address can be found. 1581 If there is not yet a GOT entry for this value, create one. 1582 Returns -1 if no satisfactory GOT offset can be found. */ 1583 1584 static bfd_vma 1585 score_elf_local_got_index (bfd *abfd, bfd *ibfd, struct bfd_link_info *info, 1586 bfd_vma value, unsigned long r_symndx, 1587 struct score_elf_link_hash_entry *h, int r_type) 1588 { 1589 asection *sgot; 1590 struct score_got_info *g; 1591 struct score_got_entry *entry; 1592 1593 g = score_elf_got_info (elf_hash_table (info)->dynobj, &sgot); 1594 1595 entry = score_elf_create_local_got_entry (abfd, ibfd, g, sgot, value, 1596 r_symndx, h, r_type); 1597 if (!entry) 1598 return MINUS_ONE; 1599 1600 else 1601 return entry->gotidx; 1602 } 1603 1604 /* Returns the GOT index for the global symbol indicated by H. */ 1605 1606 static bfd_vma 1607 score_elf_global_got_index (bfd *abfd, struct elf_link_hash_entry *h) 1608 { 1609 bfd_vma got_index; 1610 asection *sgot; 1611 struct score_got_info *g; 1612 long global_got_dynindx = 0; 1613 1614 g = score_elf_got_info (abfd, &sgot); 1615 if (g->global_gotsym != NULL) 1616 global_got_dynindx = g->global_gotsym->dynindx; 1617 1618 /* Once we determine the global GOT entry with the lowest dynamic 1619 symbol table index, we must put all dynamic symbols with greater 1620 indices into the GOT. That makes it easy to calculate the GOT 1621 offset. */ 1622 BFD_ASSERT (h->dynindx >= global_got_dynindx); 1623 got_index = ((h->dynindx - global_got_dynindx + g->local_gotno) * SCORE_ELF_GOT_SIZE (abfd)); 1624 BFD_ASSERT (got_index < sgot->size); 1625 1626 return got_index; 1627 } 1628 1629 /* Returns the offset for the entry at the INDEXth position in the GOT. */ 1630 1631 static bfd_vma 1632 score_elf_got_offset_from_index (bfd *dynobj, 1633 bfd *output_bfd, 1634 bfd *input_bfd ATTRIBUTE_UNUSED, 1635 bfd_vma got_index) 1636 { 1637 asection *sgot; 1638 bfd_vma gp; 1639 1640 score_elf_got_info (dynobj, &sgot); 1641 gp = _bfd_get_gp_value (output_bfd); 1642 1643 return sgot->output_section->vma + sgot->output_offset + got_index - gp; 1644 } 1645 1646 /* Follow indirect and warning hash entries so that each got entry 1647 points to the final symbol definition. P must point to a pointer 1648 to the hash table we're traversing. Since this traversal may 1649 modify the hash table, we set this pointer to NULL to indicate 1650 we've made a potentially-destructive change to the hash table, so 1651 the traversal must be restarted. */ 1652 1653 static int 1654 score_elf_resolve_final_got_entry (void **entryp, void *p) 1655 { 1656 struct score_got_entry *entry = (struct score_got_entry *) *entryp; 1657 htab_t got_entries = *(htab_t *) p; 1658 1659 if (entry->abfd != NULL && entry->symndx == -1) 1660 { 1661 struct score_elf_link_hash_entry *h = entry->d.h; 1662 1663 while (h->root.root.type == bfd_link_hash_indirect 1664 || h->root.root.type == bfd_link_hash_warning) 1665 h = (struct score_elf_link_hash_entry *) h->root.root.u.i.link; 1666 1667 if (entry->d.h == h) 1668 return 1; 1669 1670 entry->d.h = h; 1671 1672 /* If we can't find this entry with the new bfd hash, re-insert 1673 it, and get the traversal restarted. */ 1674 if (! htab_find (got_entries, entry)) 1675 { 1676 htab_clear_slot (got_entries, entryp); 1677 entryp = htab_find_slot (got_entries, entry, INSERT); 1678 if (! *entryp) 1679 *entryp = entry; 1680 /* Abort the traversal, since the whole table may have 1681 moved, and leave it up to the parent to restart the 1682 process. */ 1683 *(htab_t *) p = NULL; 1684 return 0; 1685 } 1686 /* We might want to decrement the global_gotno count, but it's 1687 either too early or too late for that at this point. */ 1688 } 1689 1690 return 1; 1691 } 1692 1693 /* Turn indirect got entries in a got_entries table into their final locations. */ 1694 1695 static void 1696 score_elf_resolve_final_got_entries (struct score_got_info *g) 1697 { 1698 htab_t got_entries; 1699 1700 do 1701 { 1702 got_entries = g->got_entries; 1703 1704 htab_traverse (got_entries, 1705 score_elf_resolve_final_got_entry, 1706 &got_entries); 1707 } 1708 while (got_entries == NULL); 1709 } 1710 1711 /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. for -r */ 1712 1713 static void 1714 score_elf_add_to_rel (bfd *abfd, 1715 bfd_byte *address, 1716 reloc_howto_type *howto, 1717 bfd_signed_vma increment) 1718 { 1719 bfd_signed_vma addend; 1720 bfd_vma contents; 1721 unsigned long offset; 1722 unsigned long r_type = howto->type; 1723 unsigned long hi16_addend, hi16_offset, hi16_value, uvalue; 1724 1725 contents = bfd_get_32 (abfd, address); 1726 /* Get the (signed) value from the instruction. */ 1727 addend = contents & howto->src_mask; 1728 if (addend & ((howto->src_mask + 1) >> 1)) 1729 { 1730 bfd_signed_vma mask; 1731 1732 mask = -1; 1733 mask &= ~howto->src_mask; 1734 addend |= mask; 1735 } 1736 /* Add in the increment, (which is a byte value). */ 1737 switch (r_type) 1738 { 1739 case R_SCORE_PC19: 1740 offset = 1741 (((contents & howto->src_mask) & 0x3ff0000) >> 6) | ((contents & howto->src_mask) & 0x3ff); 1742 offset += increment; 1743 contents = 1744 (contents & ~howto-> 1745 src_mask) | (((offset << 6) & howto->src_mask) & 0x3ff0000) | (offset & 0x3ff); 1746 bfd_put_32 (abfd, contents, address); 1747 break; 1748 case R_SCORE_HI16: 1749 break; 1750 case R_SCORE_LO16: 1751 hi16_addend = bfd_get_32 (abfd, address - 4); 1752 hi16_offset = ((((hi16_addend >> 16) & 0x3) << 15) | (hi16_addend & 0x7fff)) >> 1; 1753 offset = ((((contents >> 16) & 0x3) << 15) | (contents & 0x7fff)) >> 1; 1754 offset = (hi16_offset << 16) | (offset & 0xffff); 1755 uvalue = increment + offset; 1756 hi16_offset = (uvalue >> 16) << 1; 1757 hi16_value = (hi16_addend & (~(howto->dst_mask))) 1758 | (hi16_offset & 0x7fff) | ((hi16_offset << 1) & 0x30000); 1759 bfd_put_32 (abfd, hi16_value, address - 4); 1760 offset = (uvalue & 0xffff) << 1; 1761 contents = (contents & (~(howto->dst_mask))) | (offset & 0x7fff) | ((offset << 1) & 0x30000); 1762 bfd_put_32 (abfd, contents, address); 1763 break; 1764 case R_SCORE_24: 1765 offset = 1766 (((contents & howto->src_mask) >> 1) & 0x1ff8000) | ((contents & howto->src_mask) & 0x7fff); 1767 offset += increment; 1768 contents = 1769 (contents & ~howto-> 1770 src_mask) | (((offset << 1) & howto->src_mask) & 0x3ff0000) | (offset & 0x7fff); 1771 bfd_put_32 (abfd, contents, address); 1772 break; 1773 case R_SCORE16_11: 1774 1775 contents = bfd_get_16 (abfd, address); 1776 offset = contents & howto->src_mask; 1777 offset += increment; 1778 contents = (contents & ~howto->src_mask) | (offset & howto->src_mask); 1779 bfd_put_16 (abfd, contents, address); 1780 1781 break; 1782 case R_SCORE16_PC8: 1783 1784 contents = bfd_get_16 (abfd, address); 1785 offset = (contents & howto->src_mask) + ((increment >> 1) & 0xff); 1786 contents = (contents & (~howto->src_mask)) | (offset & howto->src_mask); 1787 bfd_put_16 (abfd, contents, address); 1788 1789 break; 1790 case R_SCORE_GOT15: 1791 case R_SCORE_GOT_LO16: 1792 break; 1793 1794 default: 1795 addend += increment; 1796 contents = (contents & ~howto->dst_mask) | (addend & howto->dst_mask); 1797 bfd_put_32 (abfd, contents, address); 1798 break; 1799 } 1800 } 1801 1802 /* Perform a relocation as part of a final link. */ 1803 1804 static bfd_reloc_status_type 1805 score_elf_final_link_relocate (reloc_howto_type *howto, 1806 bfd *input_bfd, 1807 bfd *output_bfd, 1808 asection *input_section, 1809 bfd_byte *contents, 1810 Elf_Internal_Rela *rel, 1811 Elf_Internal_Rela *relocs, 1812 bfd_vma symbol, 1813 struct bfd_link_info *info, 1814 const char *sym_name ATTRIBUTE_UNUSED, 1815 int sym_flags ATTRIBUTE_UNUSED, 1816 struct score_elf_link_hash_entry *h, 1817 Elf_Internal_Sym *local_syms, 1818 asection **local_sections, 1819 bfd_boolean gp_disp_p) 1820 { 1821 unsigned long r_type; 1822 unsigned long r_symndx; 1823 bfd_byte *hit_data = contents + rel->r_offset; 1824 bfd_vma addend; 1825 /* The final GP value to be used for the relocatable, executable, or 1826 shared object file being produced. */ 1827 bfd_vma gp = MINUS_ONE; 1828 /* The place (section offset or address) of the storage unit being relocated. */ 1829 bfd_vma rel_addr; 1830 /* The value of GP used to create the relocatable object. */ 1831 bfd_vma gp0 = MINUS_ONE; 1832 /* The offset into the global offset table at which the address of the relocation entry 1833 symbol, adjusted by the addend, resides during execution. */ 1834 bfd_vma g = MINUS_ONE; 1835 /* TRUE if the symbol referred to by this relocation is a local symbol. */ 1836 bfd_boolean local_p; 1837 /* The eventual value we will relocate. */ 1838 bfd_vma value = symbol; 1839 unsigned long hi16_addend, hi16_offset, hi16_value, uvalue, offset, abs_value = 0; 1840 1841 Elf_Internal_Sym *sym = 0; 1842 asection *sec = NULL; 1843 bfd_boolean merge_p = 0; 1844 1845 1846 if (elf_gp (output_bfd) == 0) 1847 { 1848 struct bfd_link_hash_entry *bh; 1849 asection *o; 1850 1851 bh = bfd_link_hash_lookup (info->hash, "_gp", 0, 0, 1); 1852 if (bh != NULL && bh->type == bfd_link_hash_defined) 1853 elf_gp (output_bfd) = (bh->u.def.value 1854 + bh->u.def.section->output_section->vma 1855 + bh->u.def.section->output_offset); 1856 else if (bfd_link_relocatable (info)) 1857 { 1858 bfd_vma lo = -1; 1859 1860 /* Find the GP-relative section with the lowest offset. */ 1861 for (o = output_bfd->sections; o != NULL; o = o->next) 1862 if (o->vma < lo) 1863 lo = o->vma; 1864 /* And calculate GP relative to that. */ 1865 elf_gp (output_bfd) = lo + ELF_SCORE_GP_OFFSET (input_bfd); 1866 } 1867 else 1868 { 1869 /* If the relocate_section function needs to do a reloc 1870 involving the GP value, it should make a reloc_dangerous 1871 callback to warn that GP is not defined. */ 1872 } 1873 } 1874 1875 /* Parse the relocation. */ 1876 r_symndx = ELF32_R_SYM (rel->r_info); 1877 r_type = ELF32_R_TYPE (rel->r_info); 1878 rel_addr = (input_section->output_section->vma + input_section->output_offset + rel->r_offset); 1879 1880 /* For hidden symbol. */ 1881 local_p = score_elf_local_relocation_p (input_bfd, rel, local_sections, FALSE); 1882 if (local_p) 1883 { 1884 sym = local_syms + r_symndx; 1885 sec = local_sections[r_symndx]; 1886 1887 symbol = sec->output_section->vma + sec->output_offset; 1888 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION 1889 || (sec->flags & SEC_MERGE)) 1890 symbol += sym->st_value; 1891 if ((sec->flags & SEC_MERGE) 1892 && ELF_ST_TYPE (sym->st_info) == STT_SECTION) 1893 merge_p = 1; 1894 } 1895 1896 if (r_type == R_SCORE_GOT15) 1897 { 1898 const Elf_Internal_Rela *relend; 1899 const Elf_Internal_Rela *lo16_rel; 1900 const struct elf_backend_data *bed; 1901 bfd_vma lo_value = 0; 1902 1903 bed = get_elf_backend_data (output_bfd); 1904 relend = relocs + input_section->reloc_count * bed->s->int_rels_per_ext_rel; 1905 lo16_rel = score_elf_next_relocation (input_bfd, R_SCORE_GOT_LO16, rel, relend); 1906 if ((local_p) && (lo16_rel != NULL)) 1907 { 1908 bfd_vma tmp = 0; 1909 tmp = bfd_get_32 (input_bfd, contents + lo16_rel->r_offset); 1910 lo_value = (((tmp >> 16) & 0x3) << 14) | ((tmp & 0x7fff) >> 1); 1911 if (merge_p) 1912 { 1913 asection *msec = sec; 1914 lo_value = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, lo_value); 1915 lo_value -= symbol; 1916 lo_value += msec->output_section->vma + msec->output_offset; 1917 } 1918 } 1919 addend = lo_value; 1920 } 1921 else 1922 { 1923 addend = (bfd_get_32 (input_bfd, hit_data) >> howto->bitpos) & howto->src_mask; 1924 } 1925 1926 /* Figure out the value of the symbol. */ 1927 if (local_p && !merge_p) 1928 { 1929 if (r_type == R_SCORE_GOT15) 1930 { 1931 const Elf_Internal_Rela *relend; 1932 const Elf_Internal_Rela *lo16_rel; 1933 const struct elf_backend_data *bed; 1934 bfd_vma lo_value = 0; 1935 1936 value = bfd_get_32 (input_bfd, contents + rel->r_offset); 1937 addend = value & 0x7fff; 1938 if ((addend & 0x4000) == 0x4000) 1939 addend |= 0xffffc000; 1940 1941 bed = get_elf_backend_data (output_bfd); 1942 relend = relocs + input_section->reloc_count * bed->s->int_rels_per_ext_rel; 1943 lo16_rel = score_elf_next_relocation (input_bfd, R_SCORE_GOT_LO16, rel, relend); 1944 if ((local_p) && (lo16_rel != NULL)) 1945 { 1946 bfd_vma tmp = 0; 1947 tmp = bfd_get_32 (input_bfd, contents + lo16_rel->r_offset); 1948 lo_value = (((tmp >> 16) & 0x3) << 14) | ((tmp & 0x7fff) >> 1); 1949 } 1950 1951 addend <<= 16; 1952 addend += lo_value; 1953 } 1954 } 1955 1956 local_p = score_elf_local_relocation_p (input_bfd, rel, local_sections, TRUE); 1957 1958 /* If we haven't already determined the GOT offset, or the GP value, 1959 and we're going to need it, get it now. */ 1960 switch (r_type) 1961 { 1962 case R_SCORE_CALL15: 1963 case R_SCORE_GOT15: 1964 if (!local_p) 1965 { 1966 g = score_elf_global_got_index (elf_hash_table (info)->dynobj, 1967 (struct elf_link_hash_entry *) h); 1968 if ((! elf_hash_table(info)->dynamic_sections_created 1969 || (bfd_link_pic (info) 1970 && (info->symbolic || h->root.dynindx == -1) 1971 && h->root.def_regular))) 1972 { 1973 /* This is a static link or a -Bsymbolic link. The 1974 symbol is defined locally, or was forced to be local. 1975 We must initialize this entry in the GOT. */ 1976 bfd *tmpbfd = elf_hash_table (info)->dynobj; 1977 asection *sgot = score_elf_got_section (tmpbfd, FALSE); 1978 bfd_put_32 (tmpbfd, value, sgot->contents + g); 1979 } 1980 } 1981 else if (r_type == R_SCORE_GOT15 || r_type == R_SCORE_CALL15) 1982 { 1983 /* There's no need to create a local GOT entry here; the 1984 calculation for a local GOT15 entry does not involve G. */ 1985 ; 1986 } 1987 else 1988 { 1989 g = score_elf_local_got_index (output_bfd, input_bfd, info, 1990 symbol + addend, r_symndx, h, r_type); 1991 if (g == MINUS_ONE) 1992 return bfd_reloc_outofrange; 1993 } 1994 1995 /* Convert GOT indices to actual offsets. */ 1996 g = score_elf_got_offset_from_index (elf_hash_table (info)->dynobj, 1997 output_bfd, input_bfd, g); 1998 break; 1999 2000 case R_SCORE_HI16: 2001 case R_SCORE_LO16: 2002 case R_SCORE_GPREL32: 2003 gp0 = _bfd_get_gp_value (input_bfd); 2004 gp = _bfd_get_gp_value (output_bfd); 2005 break; 2006 2007 case R_SCORE_GP15: 2008 gp = _bfd_get_gp_value (output_bfd); 2009 2010 default: 2011 break; 2012 } 2013 2014 switch (r_type) 2015 { 2016 case R_SCORE_NONE: 2017 return bfd_reloc_ok; 2018 2019 case R_SCORE_ABS32: 2020 case R_SCORE_REL32: 2021 if ((bfd_link_pic (info) 2022 || (elf_hash_table (info)->dynamic_sections_created 2023 && h != NULL 2024 && h->root.def_dynamic 2025 && !h->root.def_regular)) 2026 && r_symndx != STN_UNDEF 2027 && (input_section->flags & SEC_ALLOC) != 0) 2028 { 2029 /* If we're creating a shared library, or this relocation is against a symbol 2030 in a shared library, then we can't know where the symbol will end up. 2031 So, we create a relocation record in the output, and leave the job up 2032 to the dynamic linker. */ 2033 value = addend; 2034 if (!score_elf_create_dynamic_relocation (output_bfd, info, rel, h, 2035 symbol, &value, 2036 input_section)) 2037 return bfd_reloc_undefined; 2038 } 2039 else if (r_symndx == STN_UNDEF) 2040 /* r_symndx will be STN_UNDEF (zero) only for relocs against symbols 2041 from removed linkonce sections, or sections discarded by 2042 a linker script. */ 2043 value = 0; 2044 else 2045 { 2046 if (r_type != R_SCORE_REL32) 2047 value = symbol + addend; 2048 else 2049 value = addend; 2050 } 2051 value &= howto->dst_mask; 2052 bfd_put_32 (input_bfd, value, hit_data); 2053 return bfd_reloc_ok; 2054 2055 case R_SCORE_ABS16: 2056 value += addend; 2057 if ((long) value > 0x7fff || (long) value < -0x8000) 2058 return bfd_reloc_overflow; 2059 bfd_put_16 (input_bfd, value, hit_data); 2060 return bfd_reloc_ok; 2061 2062 case R_SCORE_24: 2063 addend = bfd_get_32 (input_bfd, hit_data); 2064 offset = (((addend & howto->src_mask) >> 1) & 0x1ff8000) | ((addend & howto->src_mask) & 0x7fff); 2065 if ((offset & 0x1000000) != 0) 2066 offset |= 0xfe000000; 2067 value += offset; 2068 abs_value = value - rel_addr; 2069 if ((abs_value & 0xfe000000) != 0) 2070 return bfd_reloc_overflow; 2071 addend = (addend & ~howto->src_mask) 2072 | (((value << 1) & howto->src_mask) & 0x3ff0000) | (value & 0x7fff); 2073 bfd_put_32 (input_bfd, addend, hit_data); 2074 return bfd_reloc_ok; 2075 2076 case R_SCORE_PC19: 2077 addend = bfd_get_32 (input_bfd, hit_data); 2078 offset = (((addend & howto->src_mask) & 0x3ff0000) >> 6) | ((addend & howto->src_mask) & 0x3ff); 2079 if ((offset & 0x80000) != 0) 2080 offset |= 0xfff00000; 2081 abs_value = value = value - rel_addr + offset; 2082 /* exceed 20 bit : overflow. */ 2083 if ((abs_value & 0x80000000) == 0x80000000) 2084 abs_value = 0xffffffff - value + 1; 2085 if ((abs_value & 0xfff80000) != 0) 2086 return bfd_reloc_overflow; 2087 addend = (addend & ~howto->src_mask) 2088 | (((value << 6) & howto->src_mask) & 0x3ff0000) | (value & 0x3ff); 2089 bfd_put_32 (input_bfd, addend, hit_data); 2090 return bfd_reloc_ok; 2091 2092 case R_SCORE16_11: 2093 addend = bfd_get_16 (input_bfd, hit_data); 2094 offset = addend & howto->src_mask; 2095 if ((offset & 0x800) != 0) /* Offset is negative. */ 2096 offset |= 0xfffff000; 2097 value += offset; 2098 abs_value = value - rel_addr; 2099 if ((abs_value & 0xfffff000) != 0) 2100 return bfd_reloc_overflow; 2101 addend = (addend & ~howto->src_mask) | (value & howto->src_mask); 2102 bfd_put_16 (input_bfd, addend, hit_data); 2103 return bfd_reloc_ok; 2104 2105 case R_SCORE16_PC8: 2106 addend = bfd_get_16 (input_bfd, hit_data); 2107 offset = (addend & howto->src_mask) << 1; 2108 if ((offset & 0x100) != 0) /* Offset is negative. */ 2109 offset |= 0xfffffe00; 2110 abs_value = value = value - rel_addr + offset; 2111 /* Sign bit + exceed 9 bit. */ 2112 if (((value & 0xffffff00) != 0) && ((value & 0xffffff00) != 0xffffff00)) 2113 return bfd_reloc_overflow; 2114 value >>= 1; 2115 addend = (addend & ~howto->src_mask) | (value & howto->src_mask); 2116 bfd_put_16 (input_bfd, addend, hit_data); 2117 return bfd_reloc_ok; 2118 2119 case R_SCORE_HI16: 2120 return bfd_reloc_ok; 2121 2122 case R_SCORE_LO16: 2123 hi16_addend = bfd_get_32 (input_bfd, hit_data - 4); 2124 hi16_offset = ((((hi16_addend >> 16) & 0x3) << 15) | (hi16_addend & 0x7fff)) >> 1; 2125 addend = bfd_get_32 (input_bfd, hit_data); 2126 offset = ((((addend >> 16) & 0x3) << 15) | (addend & 0x7fff)) >> 1; 2127 offset = (hi16_offset << 16) | (offset & 0xffff); 2128 2129 if (!gp_disp_p) 2130 uvalue = value + offset; 2131 else 2132 uvalue = offset + gp - rel_addr + 4; 2133 2134 hi16_offset = (uvalue >> 16) << 1; 2135 hi16_value = (hi16_addend & (~(howto->dst_mask))) 2136 | (hi16_offset & 0x7fff) | ((hi16_offset << 1) & 0x30000); 2137 bfd_put_32 (input_bfd, hi16_value, hit_data - 4); 2138 offset = (uvalue & 0xffff) << 1; 2139 value = (addend & (~(howto->dst_mask))) | (offset & 0x7fff) | ((offset << 1) & 0x30000); 2140 bfd_put_32 (input_bfd, value, hit_data); 2141 return bfd_reloc_ok; 2142 2143 case R_SCORE_GP15: 2144 addend = bfd_get_32 (input_bfd, hit_data); 2145 offset = addend & 0x7fff; 2146 if ((offset & 0x4000) == 0x4000) 2147 offset |= 0xffffc000; 2148 value = value + offset - gp; 2149 if (((value & 0xffffc000) != 0) && ((value & 0xffffc000) != 0xffffc000)) 2150 return bfd_reloc_overflow; 2151 value = (addend & ~howto->src_mask) | (value & howto->src_mask); 2152 bfd_put_32 (input_bfd, value, hit_data); 2153 return bfd_reloc_ok; 2154 2155 case R_SCORE_GOT15: 2156 case R_SCORE_CALL15: 2157 if (local_p) 2158 { 2159 bfd_boolean forced; 2160 2161 /* The special case is when the symbol is forced to be local. We need the 2162 full address in the GOT since no R_SCORE_GOT_LO16 relocation follows. */ 2163 forced = ! score_elf_local_relocation_p (input_bfd, rel, 2164 local_sections, FALSE); 2165 value = score_elf_got16_entry (output_bfd, input_bfd, info, 2166 symbol + addend, forced); 2167 if (value == MINUS_ONE) 2168 return bfd_reloc_outofrange; 2169 value = score_elf_got_offset_from_index (elf_hash_table (info)->dynobj, 2170 output_bfd, input_bfd, value); 2171 } 2172 else 2173 { 2174 value = g; 2175 } 2176 2177 if ((long) value > 0x3fff || (long) value < -0x4000) 2178 return bfd_reloc_overflow; 2179 2180 addend = bfd_get_32 (input_bfd, hit_data); 2181 value = (addend & ~howto->dst_mask) | (value & howto->dst_mask); 2182 bfd_put_32 (input_bfd, value, hit_data); 2183 return bfd_reloc_ok; 2184 2185 case R_SCORE_GPREL32: 2186 value = (addend + symbol + gp0 - gp); 2187 value &= howto->dst_mask; 2188 bfd_put_32 (input_bfd, value, hit_data); 2189 return bfd_reloc_ok; 2190 2191 case R_SCORE_GOT_LO16: 2192 addend = bfd_get_32 (input_bfd, hit_data); 2193 value = (((addend >> 16) & 0x3) << 14) | ((addend & 0x7fff) >> 1); 2194 value += symbol; 2195 value = (addend & (~(howto->dst_mask))) | ((value & 0x3fff) << 1) 2196 | (((value >> 14) & 0x3) << 16); 2197 2198 bfd_put_32 (input_bfd, value, hit_data); 2199 return bfd_reloc_ok; 2200 2201 case R_SCORE_DUMMY_HI16: 2202 return bfd_reloc_ok; 2203 2204 case R_SCORE_GNU_VTINHERIT: 2205 case R_SCORE_GNU_VTENTRY: 2206 /* We don't do anything with these at present. */ 2207 return bfd_reloc_continue; 2208 2209 default: 2210 return bfd_reloc_notsupported; 2211 } 2212 } 2213 2214 /* Score backend functions. */ 2215 2216 void 2217 s7_bfd_score_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, 2218 arelent *bfd_reloc, 2219 Elf_Internal_Rela *elf_reloc) 2220 { 2221 unsigned int r_type; 2222 2223 r_type = ELF32_R_TYPE (elf_reloc->r_info); 2224 if (r_type >= ARRAY_SIZE (elf32_score_howto_table)) 2225 bfd_reloc->howto = NULL; 2226 else 2227 bfd_reloc->howto = &elf32_score_howto_table[r_type]; 2228 } 2229 2230 /* Relocate an score ELF section. */ 2231 2232 bfd_boolean 2233 s7_bfd_score_elf_relocate_section (bfd *output_bfd, 2234 struct bfd_link_info *info, 2235 bfd *input_bfd, 2236 asection *input_section, 2237 bfd_byte *contents, 2238 Elf_Internal_Rela *relocs, 2239 Elf_Internal_Sym *local_syms, 2240 asection **local_sections) 2241 { 2242 Elf_Internal_Shdr *symtab_hdr; 2243 Elf_Internal_Rela *rel; 2244 Elf_Internal_Rela *relend; 2245 const char *name; 2246 unsigned long offset; 2247 unsigned long hi16_addend, hi16_offset, hi16_value, uvalue; 2248 size_t extsymoff; 2249 bfd_boolean gp_disp_p = FALSE; 2250 2251 /* Sort dynsym. */ 2252 if (elf_hash_table (info)->dynamic_sections_created) 2253 { 2254 bfd_size_type dynsecsymcount = 0; 2255 if (bfd_link_pic (info)) 2256 { 2257 asection * p; 2258 const struct elf_backend_data *bed = get_elf_backend_data (output_bfd); 2259 2260 for (p = output_bfd->sections; p ; p = p->next) 2261 if ((p->flags & SEC_EXCLUDE) == 0 2262 && (p->flags & SEC_ALLOC) != 0 2263 && !(*bed->elf_backend_omit_section_dynsym) (output_bfd, info, p)) 2264 ++ dynsecsymcount; 2265 } 2266 2267 if (!score_elf_sort_hash_table (info, dynsecsymcount + 1)) 2268 return FALSE; 2269 } 2270 2271 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; 2272 extsymoff = (elf_bad_symtab (input_bfd)) ? 0 : symtab_hdr->sh_info; 2273 rel = relocs; 2274 relend = relocs + input_section->reloc_count; 2275 for (; rel < relend; rel++) 2276 { 2277 int r_type; 2278 reloc_howto_type *howto; 2279 unsigned long r_symndx; 2280 Elf_Internal_Sym *sym; 2281 asection *sec; 2282 struct score_elf_link_hash_entry *h; 2283 bfd_vma relocation = 0; 2284 bfd_reloc_status_type r; 2285 arelent bfd_reloc; 2286 2287 r_symndx = ELF32_R_SYM (rel->r_info); 2288 r_type = ELF32_R_TYPE (rel->r_info); 2289 2290 s7_bfd_score_info_to_howto (input_bfd, &bfd_reloc, (Elf_Internal_Rela *) rel); 2291 howto = bfd_reloc.howto; 2292 2293 h = NULL; 2294 sym = NULL; 2295 sec = NULL; 2296 2297 if (r_symndx < extsymoff) 2298 { 2299 sym = local_syms + r_symndx; 2300 sec = local_sections[r_symndx]; 2301 relocation = sec->output_section->vma + sec->output_offset; 2302 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec); 2303 2304 if (!bfd_link_relocatable (info)) 2305 { 2306 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION 2307 || (sec->flags & SEC_MERGE)) 2308 { 2309 relocation += sym->st_value; 2310 } 2311 2312 if ((sec->flags & SEC_MERGE) 2313 && ELF_ST_TYPE (sym->st_info) == STT_SECTION) 2314 { 2315 asection *msec; 2316 bfd_vma addend, value; 2317 2318 switch (r_type) 2319 { 2320 case R_SCORE_HI16: 2321 break; 2322 case R_SCORE_LO16: 2323 hi16_addend = bfd_get_32 (input_bfd, contents + rel->r_offset - 4); 2324 hi16_offset = ((((hi16_addend >> 16) & 0x3) << 15) | (hi16_addend & 0x7fff)) >> 1; 2325 value = bfd_get_32 (input_bfd, contents + rel->r_offset); 2326 offset = ((((value >> 16) & 0x3) << 15) | (value & 0x7fff)) >> 1; 2327 addend = (hi16_offset << 16) | (offset & 0xffff); 2328 msec = sec; 2329 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend); 2330 addend -= relocation; 2331 addend += msec->output_section->vma + msec->output_offset; 2332 uvalue = addend; 2333 hi16_offset = (uvalue >> 16) << 1; 2334 hi16_value = (hi16_addend & (~(howto->dst_mask))) 2335 | (hi16_offset & 0x7fff) | ((hi16_offset << 1) & 0x30000); 2336 bfd_put_32 (input_bfd, hi16_value, contents + rel->r_offset - 4); 2337 offset = (uvalue & 0xffff) << 1; 2338 value = (value & (~(howto->dst_mask))) 2339 | (offset & 0x7fff) | ((offset << 1) & 0x30000); 2340 bfd_put_32 (input_bfd, value, contents + rel->r_offset); 2341 break; 2342 case R_SCORE_GOT_LO16: 2343 value = bfd_get_32 (input_bfd, contents + rel->r_offset); 2344 addend = (((value >> 16) & 0x3) << 14) | ((value & 0x7fff) >> 1); 2345 msec = sec; 2346 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend) - relocation; 2347 addend += msec->output_section->vma + msec->output_offset; 2348 value = (value & (~(howto->dst_mask))) | ((addend & 0x3fff) << 1) 2349 | (((addend >> 14) & 0x3) << 16); 2350 2351 bfd_put_32 (input_bfd, value, contents + rel->r_offset); 2352 break; 2353 default: 2354 value = bfd_get_32 (input_bfd, contents + rel->r_offset); 2355 /* Get the (signed) value from the instruction. */ 2356 addend = value & howto->src_mask; 2357 if (addend & ((howto->src_mask + 1) >> 1)) 2358 { 2359 bfd_signed_vma mask; 2360 2361 mask = -1; 2362 mask &= ~howto->src_mask; 2363 addend |= mask; 2364 } 2365 msec = sec; 2366 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend) - relocation; 2367 addend += msec->output_section->vma + msec->output_offset; 2368 value = (value & ~howto->dst_mask) | (addend & howto->dst_mask); 2369 bfd_put_32 (input_bfd, value, contents + rel->r_offset); 2370 break; 2371 } 2372 } 2373 } 2374 } 2375 else 2376 { 2377 /* For global symbols we look up the symbol in the hash-table. */ 2378 h = ((struct score_elf_link_hash_entry *) 2379 elf_sym_hashes (input_bfd) [r_symndx - extsymoff]); 2380 2381 if (info->wrap_hash != NULL 2382 && (input_section->flags & SEC_DEBUGGING) != 0) 2383 h = ((struct score_elf_link_hash_entry *) 2384 unwrap_hash_lookup (info, input_bfd, &h->root.root)); 2385 2386 /* Find the real hash-table entry for this symbol. */ 2387 while (h->root.root.type == bfd_link_hash_indirect 2388 || h->root.root.type == bfd_link_hash_warning) 2389 h = (struct score_elf_link_hash_entry *) h->root.root.u.i.link; 2390 2391 /* Record the name of this symbol, for our caller. */ 2392 name = h->root.root.root.string; 2393 2394 /* See if this is the special GP_DISP_LABEL symbol. Note that such a 2395 symbol must always be a global symbol. */ 2396 if (strcmp (name, GP_DISP_LABEL) == 0) 2397 { 2398 /* Relocations against GP_DISP_LABEL are permitted only with 2399 R_SCORE_HI16 and R_SCORE_LO16 relocations. */ 2400 if (r_type != R_SCORE_HI16 && r_type != R_SCORE_LO16) 2401 return bfd_reloc_notsupported; 2402 2403 gp_disp_p = TRUE; 2404 } 2405 2406 /* If this symbol is defined, calculate its address. Note that 2407 GP_DISP_LABEL is a magic symbol, always implicitly defined by the 2408 linker, so it's inappropriate to check to see whether or not 2409 its defined. */ 2410 else if ((h->root.root.type == bfd_link_hash_defined 2411 || h->root.root.type == bfd_link_hash_defweak) 2412 && h->root.root.u.def.section) 2413 { 2414 sec = h->root.root.u.def.section; 2415 if (sec->output_section) 2416 relocation = (h->root.root.u.def.value 2417 + sec->output_section->vma 2418 + sec->output_offset); 2419 else 2420 { 2421 relocation = h->root.root.u.def.value; 2422 } 2423 } 2424 else if (h->root.root.type == bfd_link_hash_undefweak) 2425 /* We allow relocations against undefined weak symbols, giving 2426 it the value zero, so that you can undefined weak functions 2427 and check to see if they exist by looking at their addresses. */ 2428 relocation = 0; 2429 else if (info->unresolved_syms_in_objects == RM_IGNORE 2430 && ELF_ST_VISIBILITY (h->root.other) == STV_DEFAULT) 2431 relocation = 0; 2432 else if (strcmp (name, "_DYNAMIC_LINK") == 0) 2433 { 2434 /* If this is a dynamic link, we should have created a _DYNAMIC_LINK symbol 2435 in s7_bfd_score_elf_create_dynamic_sections. Otherwise, we should define 2436 the symbol with a value of 0. */ 2437 BFD_ASSERT (! bfd_link_pic (info)); 2438 BFD_ASSERT (bfd_get_section_by_name (output_bfd, ".dynamic") == NULL); 2439 relocation = 0; 2440 } 2441 else if (!bfd_link_relocatable (info)) 2442 { 2443 if (! ((*info->callbacks->undefined_symbol) 2444 (info, h->root.root.root.string, input_bfd, 2445 input_section, rel->r_offset, 2446 (info->unresolved_syms_in_objects == RM_GENERATE_ERROR) 2447 || ELF_ST_VISIBILITY (h->root.other)))) 2448 return bfd_reloc_undefined; 2449 relocation = 0; 2450 } 2451 } 2452 2453 if (sec != NULL && discarded_section (sec)) 2454 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, 2455 rel, 1, relend, howto, 0, contents); 2456 2457 if (bfd_link_relocatable (info)) 2458 { 2459 /* This is a relocatable link. We don't have to change 2460 anything, unless the reloc is against a section symbol, 2461 in which case we have to adjust according to where the 2462 section symbol winds up in the output section. */ 2463 if (r_symndx < symtab_hdr->sh_info) 2464 { 2465 sym = local_syms + r_symndx; 2466 2467 if (r_type == R_SCORE_GOT15) 2468 { 2469 const Elf_Internal_Rela *lo16_rel; 2470 const struct elf_backend_data *bed; 2471 bfd_vma lo_addend = 0, lo_value = 0; 2472 bfd_vma addend, value; 2473 2474 value = bfd_get_32 (input_bfd, contents + rel->r_offset); 2475 addend = value & 0x7fff; 2476 if ((addend & 0x4000) == 0x4000) 2477 addend |= 0xffffc000; 2478 2479 bed = get_elf_backend_data (output_bfd); 2480 relend = relocs + input_section->reloc_count * bed->s->int_rels_per_ext_rel; 2481 lo16_rel = score_elf_next_relocation (input_bfd, R_SCORE_GOT_LO16, rel, relend); 2482 if (lo16_rel != NULL) 2483 { 2484 lo_value = bfd_get_32 (input_bfd, contents + lo16_rel->r_offset); 2485 lo_addend = (((lo_value >> 16) & 0x3) << 14) | ((lo_value & 0x7fff) >> 1); 2486 } 2487 2488 addend <<= 16; 2489 addend += lo_addend; 2490 2491 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) 2492 addend += local_sections[r_symndx]->output_offset; 2493 2494 lo_addend = addend & 0xffff; 2495 lo_value = (lo_value & (~(howto->dst_mask))) | ((lo_addend & 0x3fff) << 1) 2496 | (((lo_addend >> 14) & 0x3) << 16); 2497 bfd_put_32 (input_bfd, lo_value, contents + lo16_rel->r_offset); 2498 2499 addend = addend >> 16; 2500 value = (value & ~howto->src_mask) | (addend & howto->src_mask); 2501 bfd_put_32 (input_bfd, value, contents + rel->r_offset); 2502 } 2503 else if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) 2504 { 2505 sec = local_sections[r_symndx]; 2506 score_elf_add_to_rel (input_bfd, contents + rel->r_offset, 2507 howto, (bfd_signed_vma) (sec->output_offset + sym->st_value)); 2508 } 2509 } 2510 continue; 2511 } 2512 2513 /* This is a final link. */ 2514 r = score_elf_final_link_relocate (howto, input_bfd, output_bfd, 2515 input_section, contents, rel, relocs, 2516 relocation, info, name, 2517 (h ? ELF_ST_TYPE ((unsigned int) h->root.root.type) : 2518 ELF_ST_TYPE ((unsigned int) sym->st_info)), h, local_syms, 2519 local_sections, gp_disp_p); 2520 2521 if (r != bfd_reloc_ok) 2522 { 2523 const char *msg = (const char *)0; 2524 2525 switch (r) 2526 { 2527 case bfd_reloc_overflow: 2528 /* If the overflowing reloc was to an undefined symbol, 2529 we have already printed one error message and there 2530 is no point complaining again. */ 2531 if (((!h) || (h->root.root.type != bfd_link_hash_undefined)) 2532 && (!((*info->callbacks->reloc_overflow) 2533 (info, NULL, name, howto->name, (bfd_vma) 0, 2534 input_bfd, input_section, rel->r_offset)))) 2535 return FALSE; 2536 break; 2537 case bfd_reloc_undefined: 2538 if (!((*info->callbacks->undefined_symbol) 2539 (info, name, input_bfd, input_section, rel->r_offset, TRUE))) 2540 return FALSE; 2541 break; 2542 2543 case bfd_reloc_outofrange: 2544 msg = _("internal error: out of range error"); 2545 goto common_error; 2546 2547 case bfd_reloc_notsupported: 2548 msg = _("internal error: unsupported relocation error"); 2549 goto common_error; 2550 2551 case bfd_reloc_dangerous: 2552 msg = _("internal error: dangerous error"); 2553 goto common_error; 2554 2555 default: 2556 msg = _("internal error: unknown error"); 2557 /* fall through */ 2558 2559 common_error: 2560 if (!((*info->callbacks->warning) 2561 (info, msg, name, input_bfd, input_section, rel->r_offset))) 2562 return FALSE; 2563 break; 2564 } 2565 } 2566 } 2567 2568 return TRUE; 2569 } 2570 2571 /* Look through the relocs for a section during the first phase, and 2572 allocate space in the global offset table. */ 2573 2574 bfd_boolean 2575 s7_bfd_score_elf_check_relocs (bfd *abfd, 2576 struct bfd_link_info *info, 2577 asection *sec, 2578 const Elf_Internal_Rela *relocs) 2579 { 2580 const char *name; 2581 bfd *dynobj; 2582 Elf_Internal_Shdr *symtab_hdr; 2583 struct elf_link_hash_entry **sym_hashes; 2584 struct score_got_info *g; 2585 size_t extsymoff; 2586 const Elf_Internal_Rela *rel; 2587 const Elf_Internal_Rela *rel_end; 2588 asection *sgot; 2589 asection *sreloc; 2590 const struct elf_backend_data *bed; 2591 2592 if (bfd_link_relocatable (info)) 2593 return TRUE; 2594 2595 dynobj = elf_hash_table (info)->dynobj; 2596 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 2597 sym_hashes = elf_sym_hashes (abfd); 2598 extsymoff = (elf_bad_symtab (abfd)) ? 0 : symtab_hdr->sh_info; 2599 2600 name = bfd_get_section_name (abfd, sec); 2601 2602 if (dynobj == NULL) 2603 { 2604 sgot = NULL; 2605 g = NULL; 2606 } 2607 else 2608 { 2609 sgot = score_elf_got_section (dynobj, FALSE); 2610 if (sgot == NULL) 2611 g = NULL; 2612 else 2613 { 2614 BFD_ASSERT (score_elf_section_data (sgot) != NULL); 2615 g = score_elf_section_data (sgot)->u.got_info; 2616 BFD_ASSERT (g != NULL); 2617 } 2618 } 2619 2620 sreloc = NULL; 2621 bed = get_elf_backend_data (abfd); 2622 rel_end = relocs + sec->reloc_count * bed->s->int_rels_per_ext_rel; 2623 for (rel = relocs; rel < rel_end; ++rel) 2624 { 2625 unsigned long r_symndx; 2626 unsigned int r_type; 2627 struct elf_link_hash_entry *h; 2628 2629 r_symndx = ELF32_R_SYM (rel->r_info); 2630 r_type = ELF32_R_TYPE (rel->r_info); 2631 2632 if (r_symndx < extsymoff) 2633 { 2634 h = NULL; 2635 } 2636 else if (r_symndx >= extsymoff + NUM_SHDR_ENTRIES (symtab_hdr)) 2637 { 2638 (*_bfd_error_handler) (_("%s: Malformed reloc detected for section %s"), abfd, name); 2639 bfd_set_error (bfd_error_bad_value); 2640 return FALSE; 2641 } 2642 else 2643 { 2644 h = sym_hashes[r_symndx - extsymoff]; 2645 2646 /* This may be an indirect symbol created because of a version. */ 2647 if (h != NULL) 2648 { 2649 while (h->root.type == bfd_link_hash_indirect) 2650 h = (struct elf_link_hash_entry *) h->root.u.i.link; 2651 2652 /* PR15323, ref flags aren't set for references in the 2653 same object. */ 2654 h->root.non_ir_ref = 1; 2655 } 2656 } 2657 2658 /* Some relocs require a global offset table. */ 2659 if (dynobj == NULL || sgot == NULL) 2660 { 2661 switch (r_type) 2662 { 2663 case R_SCORE_GOT15: 2664 case R_SCORE_CALL15: 2665 if (dynobj == NULL) 2666 elf_hash_table (info)->dynobj = dynobj = abfd; 2667 if (!score_elf_create_got_section (dynobj, info, FALSE)) 2668 return FALSE; 2669 g = score_elf_got_info (dynobj, &sgot); 2670 break; 2671 case R_SCORE_ABS32: 2672 case R_SCORE_REL32: 2673 if (dynobj == NULL 2674 && (bfd_link_pic (info) || h != NULL) 2675 && (sec->flags & SEC_ALLOC) != 0) 2676 elf_hash_table (info)->dynobj = dynobj = abfd; 2677 break; 2678 default: 2679 break; 2680 } 2681 } 2682 2683 if (!h && (r_type == R_SCORE_GOT_LO16)) 2684 { 2685 if (! score_elf_record_local_got_symbol (abfd, r_symndx, rel->r_addend, g)) 2686 return FALSE; 2687 } 2688 2689 switch (r_type) 2690 { 2691 case R_SCORE_CALL15: 2692 if (h == NULL) 2693 { 2694 (*_bfd_error_handler) 2695 (_("%B: CALL15 reloc at 0x%lx not against global symbol"), 2696 abfd, (unsigned long) rel->r_offset); 2697 bfd_set_error (bfd_error_bad_value); 2698 return FALSE; 2699 } 2700 else 2701 { 2702 /* This symbol requires a global offset table entry. */ 2703 if (! score_elf_record_global_got_symbol (h, abfd, info, g)) 2704 return FALSE; 2705 2706 /* We need a stub, not a plt entry for the undefined function. But we record 2707 it as if it needs plt. See _bfd_elf_adjust_dynamic_symbol. */ 2708 h->needs_plt = 1; 2709 h->type = STT_FUNC; 2710 } 2711 break; 2712 case R_SCORE_GOT15: 2713 if (h && ! score_elf_record_global_got_symbol (h, abfd, info, g)) 2714 return FALSE; 2715 break; 2716 case R_SCORE_ABS32: 2717 case R_SCORE_REL32: 2718 if ((bfd_link_pic (info) || h != NULL) 2719 && (sec->flags & SEC_ALLOC) != 0) 2720 { 2721 if (sreloc == NULL) 2722 { 2723 sreloc = score_elf_rel_dyn_section (dynobj, TRUE); 2724 if (sreloc == NULL) 2725 return FALSE; 2726 } 2727 #define SCORE_READONLY_SECTION (SEC_ALLOC | SEC_LOAD | SEC_READONLY) 2728 if (bfd_link_pic (info)) 2729 { 2730 /* When creating a shared object, we must copy these reloc types into 2731 the output file as R_SCORE_REL32 relocs. We make room for this reloc 2732 in the .rel.dyn reloc section. */ 2733 score_elf_allocate_dynamic_relocations (dynobj, 1); 2734 if ((sec->flags & SCORE_READONLY_SECTION) 2735 == SCORE_READONLY_SECTION) 2736 /* We tell the dynamic linker that there are 2737 relocations against the text segment. */ 2738 info->flags |= DF_TEXTREL; 2739 } 2740 else 2741 { 2742 struct score_elf_link_hash_entry *hscore; 2743 2744 /* We only need to copy this reloc if the symbol is 2745 defined in a dynamic object. */ 2746 hscore = (struct score_elf_link_hash_entry *) h; 2747 ++hscore->possibly_dynamic_relocs; 2748 if ((sec->flags & SCORE_READONLY_SECTION) 2749 == SCORE_READONLY_SECTION) 2750 /* We need it to tell the dynamic linker if there 2751 are relocations against the text segment. */ 2752 hscore->readonly_reloc = TRUE; 2753 } 2754 2755 /* Even though we don't directly need a GOT entry for this symbol, 2756 a symbol must have a dynamic symbol table index greater that 2757 DT_SCORE_GOTSYM if there are dynamic relocations against it. */ 2758 if (h != NULL) 2759 { 2760 if (dynobj == NULL) 2761 elf_hash_table (info)->dynobj = dynobj = abfd; 2762 if (! score_elf_create_got_section (dynobj, info, TRUE)) 2763 return FALSE; 2764 g = score_elf_got_info (dynobj, &sgot); 2765 if (! score_elf_record_global_got_symbol (h, abfd, info, g)) 2766 return FALSE; 2767 } 2768 } 2769 break; 2770 2771 /* This relocation describes the C++ object vtable hierarchy. 2772 Reconstruct it for later use during GC. */ 2773 case R_SCORE_GNU_VTINHERIT: 2774 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 2775 return FALSE; 2776 break; 2777 2778 /* This relocation describes which C++ vtable entries are actually 2779 used. Record for later use during GC. */ 2780 case R_SCORE_GNU_VTENTRY: 2781 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset)) 2782 return FALSE; 2783 break; 2784 default: 2785 break; 2786 } 2787 2788 /* We must not create a stub for a symbol that has relocations 2789 related to taking the function's address. */ 2790 switch (r_type) 2791 { 2792 default: 2793 if (h != NULL) 2794 { 2795 struct score_elf_link_hash_entry *sh; 2796 2797 sh = (struct score_elf_link_hash_entry *) h; 2798 sh->no_fn_stub = TRUE; 2799 } 2800 break; 2801 case R_SCORE_CALL15: 2802 break; 2803 } 2804 } 2805 2806 return TRUE; 2807 } 2808 2809 bfd_boolean 2810 s7_bfd_score_elf_add_symbol_hook (bfd *abfd, 2811 struct bfd_link_info *info ATTRIBUTE_UNUSED, 2812 Elf_Internal_Sym *sym, 2813 const char **namep ATTRIBUTE_UNUSED, 2814 flagword *flagsp ATTRIBUTE_UNUSED, 2815 asection **secp, 2816 bfd_vma *valp) 2817 { 2818 switch (sym->st_shndx) 2819 { 2820 case SHN_COMMON: 2821 if (sym->st_size > elf_gp_size (abfd)) 2822 break; 2823 /* Fall through. */ 2824 case SHN_SCORE_SCOMMON: 2825 *secp = bfd_make_section_old_way (abfd, ".scommon"); 2826 (*secp)->flags |= SEC_IS_COMMON; 2827 *valp = sym->st_size; 2828 break; 2829 } 2830 2831 return TRUE; 2832 } 2833 2834 void 2835 s7_bfd_score_elf_symbol_processing (bfd *abfd, asymbol *asym) 2836 { 2837 elf_symbol_type *elfsym; 2838 2839 elfsym = (elf_symbol_type *) asym; 2840 switch (elfsym->internal_elf_sym.st_shndx) 2841 { 2842 case SHN_COMMON: 2843 if (asym->value > elf_gp_size (abfd)) 2844 break; 2845 /* Fall through. */ 2846 case SHN_SCORE_SCOMMON: 2847 if (score_elf_scom_section.name == NULL) 2848 { 2849 /* Initialize the small common section. */ 2850 score_elf_scom_section.name = ".scommon"; 2851 score_elf_scom_section.flags = SEC_IS_COMMON; 2852 score_elf_scom_section.output_section = &score_elf_scom_section; 2853 score_elf_scom_section.symbol = &score_elf_scom_symbol; 2854 score_elf_scom_section.symbol_ptr_ptr = &score_elf_scom_symbol_ptr; 2855 score_elf_scom_symbol.name = ".scommon"; 2856 score_elf_scom_symbol.flags = BSF_SECTION_SYM; 2857 score_elf_scom_symbol.section = &score_elf_scom_section; 2858 score_elf_scom_symbol_ptr = &score_elf_scom_symbol; 2859 } 2860 asym->section = &score_elf_scom_section; 2861 asym->value = elfsym->internal_elf_sym.st_size; 2862 break; 2863 } 2864 } 2865 2866 int 2867 s7_bfd_score_elf_link_output_symbol_hook (struct bfd_link_info *info ATTRIBUTE_UNUSED, 2868 const char *name ATTRIBUTE_UNUSED, 2869 Elf_Internal_Sym *sym, 2870 asection *input_sec, 2871 struct elf_link_hash_entry *h ATTRIBUTE_UNUSED) 2872 { 2873 /* If we see a common symbol, which implies a relocatable link, then 2874 if a symbol was small common in an input file, mark it as small 2875 common in the output file. */ 2876 if (sym->st_shndx == SHN_COMMON && strcmp (input_sec->name, ".scommon") == 0) 2877 sym->st_shndx = SHN_SCORE_SCOMMON; 2878 2879 return 1; 2880 } 2881 2882 bfd_boolean 2883 s7_bfd_score_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED, 2884 asection *sec, 2885 int *retval) 2886 { 2887 if (strcmp (bfd_get_section_name (abfd, sec), ".scommon") == 0) 2888 { 2889 *retval = SHN_SCORE_SCOMMON; 2890 return TRUE; 2891 } 2892 2893 return FALSE; 2894 } 2895 2896 /* Adjust a symbol defined by a dynamic object and referenced by a 2897 regular object. The current definition is in some section of the 2898 dynamic object, but we're not including those sections. We have to 2899 change the definition to something the rest of the link can understand. */ 2900 2901 bfd_boolean 2902 s7_bfd_score_elf_adjust_dynamic_symbol (struct bfd_link_info *info, 2903 struct elf_link_hash_entry *h) 2904 { 2905 bfd *dynobj; 2906 struct score_elf_link_hash_entry *hscore; 2907 asection *s; 2908 2909 dynobj = elf_hash_table (info)->dynobj; 2910 2911 /* Make sure we know what is going on here. */ 2912 BFD_ASSERT (dynobj != NULL 2913 && (h->needs_plt 2914 || h->u.weakdef != NULL 2915 || (h->def_dynamic && h->ref_regular && !h->def_regular))); 2916 2917 /* If this symbol is defined in a dynamic object, we need to copy 2918 any R_SCORE_ABS32 or R_SCORE_REL32 relocs against it into the output 2919 file. */ 2920 hscore = (struct score_elf_link_hash_entry *) h; 2921 if (!bfd_link_relocatable (info) 2922 && hscore->possibly_dynamic_relocs != 0 2923 && (h->root.type == bfd_link_hash_defweak || !h->def_regular)) 2924 { 2925 score_elf_allocate_dynamic_relocations (dynobj, hscore->possibly_dynamic_relocs); 2926 if (hscore->readonly_reloc) 2927 /* We tell the dynamic linker that there are relocations 2928 against the text segment. */ 2929 info->flags |= DF_TEXTREL; 2930 } 2931 2932 /* For a function, create a stub, if allowed. */ 2933 if (!hscore->no_fn_stub && h->needs_plt) 2934 { 2935 if (!elf_hash_table (info)->dynamic_sections_created) 2936 return TRUE; 2937 2938 /* If this symbol is not defined in a regular file, then set 2939 the symbol to the stub location. This is required to make 2940 function pointers compare as equal between the normal 2941 executable and the shared library. */ 2942 if (!h->def_regular) 2943 { 2944 /* We need .stub section. */ 2945 s = bfd_get_linker_section (dynobj, SCORE_ELF_STUB_SECTION_NAME); 2946 BFD_ASSERT (s != NULL); 2947 2948 h->root.u.def.section = s; 2949 h->root.u.def.value = s->size; 2950 2951 /* XXX Write this stub address somewhere. */ 2952 h->plt.offset = s->size; 2953 2954 /* Make room for this stub code. */ 2955 s->size += SCORE_FUNCTION_STUB_SIZE; 2956 2957 /* The last half word of the stub will be filled with the index 2958 of this symbol in .dynsym section. */ 2959 return TRUE; 2960 } 2961 } 2962 else if ((h->type == STT_FUNC) && !h->needs_plt) 2963 { 2964 /* This will set the entry for this symbol in the GOT to 0, and 2965 the dynamic linker will take care of this. */ 2966 h->root.u.def.value = 0; 2967 return TRUE; 2968 } 2969 2970 /* If this is a weak symbol, and there is a real definition, the 2971 processor independent code will have arranged for us to see the 2972 real definition first, and we can just use the same value. */ 2973 if (h->u.weakdef != NULL) 2974 { 2975 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined 2976 || h->u.weakdef->root.type == bfd_link_hash_defweak); 2977 h->root.u.def.section = h->u.weakdef->root.u.def.section; 2978 h->root.u.def.value = h->u.weakdef->root.u.def.value; 2979 return TRUE; 2980 } 2981 2982 /* This is a reference to a symbol defined by a dynamic object which 2983 is not a function. */ 2984 return TRUE; 2985 } 2986 2987 /* This function is called after all the input files have been read, 2988 and the input sections have been assigned to output sections. */ 2989 2990 bfd_boolean 2991 s7_bfd_score_elf_always_size_sections (bfd *output_bfd, 2992 struct bfd_link_info *info) 2993 { 2994 bfd *dynobj; 2995 asection *s; 2996 struct score_got_info *g; 2997 int i; 2998 bfd_size_type loadable_size = 0; 2999 bfd_size_type local_gotno; 3000 bfd *sub; 3001 3002 dynobj = elf_hash_table (info)->dynobj; 3003 if (dynobj == NULL) 3004 /* Relocatable links don't have it. */ 3005 return TRUE; 3006 3007 g = score_elf_got_info (dynobj, &s); 3008 if (s == NULL) 3009 return TRUE; 3010 3011 /* Calculate the total loadable size of the output. That will give us the 3012 maximum number of GOT_PAGE entries required. */ 3013 for (sub = info->input_bfds; sub; sub = sub->link.next) 3014 { 3015 asection *subsection; 3016 3017 for (subsection = sub->sections; 3018 subsection; 3019 subsection = subsection->next) 3020 { 3021 if ((subsection->flags & SEC_ALLOC) == 0) 3022 continue; 3023 loadable_size += ((subsection->size + 0xf) 3024 &~ (bfd_size_type) 0xf); 3025 } 3026 } 3027 3028 /* There has to be a global GOT entry for every symbol with 3029 a dynamic symbol table index of DT_SCORE_GOTSYM or 3030 higher. Therefore, it make sense to put those symbols 3031 that need GOT entries at the end of the symbol table. We 3032 do that here. */ 3033 if (! score_elf_sort_hash_table (info, 1)) 3034 return FALSE; 3035 3036 if (g->global_gotsym != NULL) 3037 i = elf_hash_table (info)->dynsymcount - g->global_gotsym->dynindx; 3038 else 3039 /* If there are no global symbols, or none requiring 3040 relocations, then GLOBAL_GOTSYM will be NULL. */ 3041 i = 0; 3042 3043 /* In the worst case, we'll get one stub per dynamic symbol. */ 3044 loadable_size += SCORE_FUNCTION_STUB_SIZE * i; 3045 3046 /* Assume there are two loadable segments consisting of 3047 contiguous sections. Is 5 enough? */ 3048 local_gotno = (loadable_size >> 16) + 5; 3049 3050 g->local_gotno += local_gotno; 3051 s->size += g->local_gotno * SCORE_ELF_GOT_SIZE (output_bfd); 3052 3053 g->global_gotno = i; 3054 s->size += i * SCORE_ELF_GOT_SIZE (output_bfd); 3055 3056 score_elf_resolve_final_got_entries (g); 3057 3058 if (s->size > SCORE_ELF_GOT_MAX_SIZE (output_bfd)) 3059 { 3060 /* Fixme. Error message or Warning message should be issued here. */ 3061 } 3062 3063 return TRUE; 3064 } 3065 3066 /* Set the sizes of the dynamic sections. */ 3067 3068 bfd_boolean 3069 s7_bfd_score_elf_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info) 3070 { 3071 bfd *dynobj; 3072 asection *s; 3073 bfd_boolean reltext; 3074 3075 dynobj = elf_hash_table (info)->dynobj; 3076 BFD_ASSERT (dynobj != NULL); 3077 3078 if (elf_hash_table (info)->dynamic_sections_created) 3079 { 3080 /* Set the contents of the .interp section to the interpreter. */ 3081 if (!bfd_link_pic (info) && !info->nointerp) 3082 { 3083 s = bfd_get_linker_section (dynobj, ".interp"); 3084 BFD_ASSERT (s != NULL); 3085 s->size = strlen (ELF_DYNAMIC_INTERPRETER) + 1; 3086 s->contents = (bfd_byte *) ELF_DYNAMIC_INTERPRETER; 3087 } 3088 } 3089 3090 /* The check_relocs and adjust_dynamic_symbol entry points have 3091 determined the sizes of the various dynamic sections. Allocate 3092 memory for them. */ 3093 reltext = FALSE; 3094 for (s = dynobj->sections; s != NULL; s = s->next) 3095 { 3096 const char *name; 3097 3098 if ((s->flags & SEC_LINKER_CREATED) == 0) 3099 continue; 3100 3101 /* It's OK to base decisions on the section name, because none 3102 of the dynobj section names depend upon the input files. */ 3103 name = bfd_get_section_name (dynobj, s); 3104 3105 if (CONST_STRNEQ (name, ".rel")) 3106 { 3107 if (s->size == 0) 3108 { 3109 /* We only strip the section if the output section name 3110 has the same name. Otherwise, there might be several 3111 input sections for this output section. FIXME: This 3112 code is probably not needed these days anyhow, since 3113 the linker now does not create empty output sections. */ 3114 if (s->output_section != NULL 3115 && strcmp (name, 3116 bfd_get_section_name (s->output_section->owner, 3117 s->output_section)) == 0) 3118 s->flags |= SEC_EXCLUDE; 3119 } 3120 else 3121 { 3122 const char *outname; 3123 asection *target; 3124 3125 /* If this relocation section applies to a read only 3126 section, then we probably need a DT_TEXTREL entry. 3127 If the relocation section is .rel.dyn, we always 3128 assert a DT_TEXTREL entry rather than testing whether 3129 there exists a relocation to a read only section or 3130 not. */ 3131 outname = bfd_get_section_name (output_bfd, s->output_section); 3132 target = bfd_get_section_by_name (output_bfd, outname + 4); 3133 if ((target != NULL 3134 && (target->flags & SEC_READONLY) != 0 3135 && (target->flags & SEC_ALLOC) != 0) || strcmp (outname, ".rel.dyn") == 0) 3136 reltext = TRUE; 3137 3138 /* We use the reloc_count field as a counter if we need 3139 to copy relocs into the output file. */ 3140 if (strcmp (name, ".rel.dyn") != 0) 3141 s->reloc_count = 0; 3142 } 3143 } 3144 else if (CONST_STRNEQ (name, ".got")) 3145 { 3146 /* s7_bfd_score_elf_always_size_sections() has already done 3147 most of the work, but some symbols may have been mapped 3148 to versions that we must now resolve in the got_entries 3149 hash tables. */ 3150 } 3151 else if (strcmp (name, SCORE_ELF_STUB_SECTION_NAME) == 0) 3152 { 3153 /* IRIX rld assumes that the function stub isn't at the end 3154 of .text section. So put a dummy. XXX */ 3155 s->size += SCORE_FUNCTION_STUB_SIZE; 3156 } 3157 else if (! CONST_STRNEQ (name, ".init")) 3158 { 3159 /* It's not one of our sections, so don't allocate space. */ 3160 continue; 3161 } 3162 3163 /* Allocate memory for the section contents. */ 3164 s->contents = bfd_zalloc (dynobj, s->size); 3165 if (s->contents == NULL && s->size != 0) 3166 { 3167 bfd_set_error (bfd_error_no_memory); 3168 return FALSE; 3169 } 3170 } 3171 3172 if (elf_hash_table (info)->dynamic_sections_created) 3173 { 3174 /* Add some entries to the .dynamic section. We fill in the 3175 values later, in s7_bfd_score_elf_finish_dynamic_sections, but we 3176 must add the entries now so that we get the correct size for 3177 the .dynamic section. The DT_DEBUG entry is filled in by the 3178 dynamic linker and used by the debugger. */ 3179 3180 if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_DEBUG, 0)) 3181 return FALSE; 3182 3183 if (reltext) 3184 info->flags |= DF_TEXTREL; 3185 3186 if ((info->flags & DF_TEXTREL) != 0) 3187 { 3188 if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_TEXTREL, 0)) 3189 return FALSE; 3190 } 3191 3192 if (! SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_PLTGOT, 0)) 3193 return FALSE; 3194 3195 if (score_elf_rel_dyn_section (dynobj, FALSE)) 3196 { 3197 if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_REL, 0)) 3198 return FALSE; 3199 3200 if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_RELSZ, 0)) 3201 return FALSE; 3202 3203 if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_RELENT, 0)) 3204 return FALSE; 3205 } 3206 3207 if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_SCORE_BASE_ADDRESS, 0)) 3208 return FALSE; 3209 3210 if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_SCORE_LOCAL_GOTNO, 0)) 3211 return FALSE; 3212 3213 if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_SCORE_SYMTABNO, 0)) 3214 return FALSE; 3215 3216 if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_SCORE_UNREFEXTNO, 0)) 3217 return FALSE; 3218 3219 if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_SCORE_GOTSYM, 0)) 3220 return FALSE; 3221 3222 if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_SCORE_HIPAGENO, 0)) 3223 return FALSE; 3224 } 3225 3226 return TRUE; 3227 } 3228 3229 bfd_boolean 3230 s7_bfd_score_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) 3231 { 3232 struct elf_link_hash_entry *h; 3233 struct bfd_link_hash_entry *bh; 3234 flagword flags; 3235 asection *s; 3236 3237 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY 3238 | SEC_LINKER_CREATED | SEC_READONLY); 3239 3240 /* ABI requests the .dynamic section to be read only. */ 3241 s = bfd_get_linker_section (abfd, ".dynamic"); 3242 if (s != NULL) 3243 { 3244 if (!bfd_set_section_flags (abfd, s, flags)) 3245 return FALSE; 3246 } 3247 3248 /* We need to create .got section. */ 3249 if (!score_elf_create_got_section (abfd, info, FALSE)) 3250 return FALSE; 3251 3252 if (!score_elf_rel_dyn_section (elf_hash_table (info)->dynobj, TRUE)) 3253 return FALSE; 3254 3255 /* Create .stub section. */ 3256 if (bfd_get_linker_section (abfd, SCORE_ELF_STUB_SECTION_NAME) == NULL) 3257 { 3258 s = bfd_make_section_anyway_with_flags (abfd, SCORE_ELF_STUB_SECTION_NAME, 3259 flags | SEC_CODE); 3260 if (s == NULL 3261 || !bfd_set_section_alignment (abfd, s, 2)) 3262 3263 return FALSE; 3264 } 3265 3266 if (!bfd_link_pic (info)) 3267 { 3268 const char *name; 3269 3270 name = "_DYNAMIC_LINK"; 3271 bh = NULL; 3272 if (!(_bfd_generic_link_add_one_symbol 3273 (info, abfd, name, BSF_GLOBAL, bfd_abs_section_ptr, 3274 (bfd_vma) 0, NULL, FALSE, get_elf_backend_data (abfd)->collect, &bh))) 3275 return FALSE; 3276 3277 h = (struct elf_link_hash_entry *) bh; 3278 h->non_elf = 0; 3279 h->def_regular = 1; 3280 h->type = STT_SECTION; 3281 3282 if (!bfd_elf_link_record_dynamic_symbol (info, h)) 3283 return FALSE; 3284 } 3285 3286 return TRUE; 3287 } 3288 3289 3290 /* Finish up dynamic symbol handling. We set the contents of various 3291 dynamic sections here. */ 3292 3293 bfd_boolean 3294 s7_bfd_score_elf_finish_dynamic_symbol (bfd *output_bfd, 3295 struct bfd_link_info *info, 3296 struct elf_link_hash_entry *h, 3297 Elf_Internal_Sym *sym) 3298 { 3299 bfd *dynobj; 3300 asection *sgot; 3301 struct score_got_info *g; 3302 const char *name; 3303 3304 dynobj = elf_hash_table (info)->dynobj; 3305 3306 if (h->plt.offset != MINUS_ONE) 3307 { 3308 asection *s; 3309 bfd_byte stub[SCORE_FUNCTION_STUB_SIZE]; 3310 3311 /* This symbol has a stub. Set it up. */ 3312 BFD_ASSERT (h->dynindx != -1); 3313 3314 s = bfd_get_linker_section (dynobj, SCORE_ELF_STUB_SECTION_NAME); 3315 BFD_ASSERT (s != NULL); 3316 3317 /* FIXME: Can h->dynindex be more than 64K? */ 3318 if (h->dynindx & 0xffff0000) 3319 return FALSE; 3320 3321 /* Fill the stub. */ 3322 bfd_put_32 (output_bfd, STUB_LW, stub); 3323 bfd_put_32 (output_bfd, STUB_MOVE, stub + 4); 3324 bfd_put_32 (output_bfd, STUB_LI16 | (h->dynindx << 1), stub + 8); 3325 bfd_put_32 (output_bfd, STUB_BRL, stub + 12); 3326 3327 BFD_ASSERT (h->plt.offset <= s->size); 3328 memcpy (s->contents + h->plt.offset, stub, SCORE_FUNCTION_STUB_SIZE); 3329 3330 /* Mark the symbol as undefined. plt.offset != -1 occurs 3331 only for the referenced symbol. */ 3332 sym->st_shndx = SHN_UNDEF; 3333 3334 /* The run-time linker uses the st_value field of the symbol 3335 to reset the global offset table entry for this external 3336 to its stub address when unlinking a shared object. */ 3337 sym->st_value = (s->output_section->vma + s->output_offset + h->plt.offset); 3338 } 3339 3340 BFD_ASSERT (h->dynindx != -1 || h->forced_local); 3341 3342 sgot = score_elf_got_section (dynobj, FALSE); 3343 BFD_ASSERT (sgot != NULL); 3344 BFD_ASSERT (score_elf_section_data (sgot) != NULL); 3345 g = score_elf_section_data (sgot)->u.got_info; 3346 BFD_ASSERT (g != NULL); 3347 3348 /* Run through the global symbol table, creating GOT entries for all 3349 the symbols that need them. */ 3350 if (g->global_gotsym != NULL && h->dynindx >= g->global_gotsym->dynindx) 3351 { 3352 bfd_vma offset; 3353 bfd_vma value; 3354 3355 value = sym->st_value; 3356 offset = score_elf_global_got_index (dynobj, h); 3357 bfd_put_32 (output_bfd, value, sgot->contents + offset); 3358 } 3359 3360 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ 3361 name = h->root.root.string; 3362 if (h == elf_hash_table (info)->hdynamic 3363 || h == elf_hash_table (info)->hgot) 3364 sym->st_shndx = SHN_ABS; 3365 else if (strcmp (name, "_DYNAMIC_LINK") == 0) 3366 { 3367 sym->st_shndx = SHN_ABS; 3368 sym->st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION); 3369 sym->st_value = 1; 3370 } 3371 else if (strcmp (name, GP_DISP_LABEL) == 0) 3372 { 3373 sym->st_shndx = SHN_ABS; 3374 sym->st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION); 3375 sym->st_value = elf_gp (output_bfd); 3376 } 3377 3378 return TRUE; 3379 } 3380 3381 /* Finish up the dynamic sections. */ 3382 3383 bfd_boolean 3384 s7_bfd_score_elf_finish_dynamic_sections (bfd *output_bfd, 3385 struct bfd_link_info *info) 3386 { 3387 bfd *dynobj; 3388 asection *sdyn; 3389 asection *sgot; 3390 asection *s; 3391 struct score_got_info *g; 3392 3393 dynobj = elf_hash_table (info)->dynobj; 3394 3395 sdyn = bfd_get_linker_section (dynobj, ".dynamic"); 3396 3397 sgot = score_elf_got_section (dynobj, FALSE); 3398 if (sgot == NULL) 3399 g = NULL; 3400 else 3401 { 3402 BFD_ASSERT (score_elf_section_data (sgot) != NULL); 3403 g = score_elf_section_data (sgot)->u.got_info; 3404 BFD_ASSERT (g != NULL); 3405 } 3406 3407 if (elf_hash_table (info)->dynamic_sections_created) 3408 { 3409 bfd_byte *b; 3410 3411 BFD_ASSERT (sdyn != NULL); 3412 BFD_ASSERT (g != NULL); 3413 3414 for (b = sdyn->contents; 3415 b < sdyn->contents + sdyn->size; 3416 b += SCORE_ELF_DYN_SIZE (dynobj)) 3417 { 3418 Elf_Internal_Dyn dyn; 3419 const char *name; 3420 size_t elemsize; 3421 bfd_boolean swap_out_p; 3422 3423 /* Read in the current dynamic entry. */ 3424 (*get_elf_backend_data (dynobj)->s->swap_dyn_in) (dynobj, b, &dyn); 3425 3426 /* Assume that we're going to modify it and write it out. */ 3427 swap_out_p = TRUE; 3428 3429 switch (dyn.d_tag) 3430 { 3431 case DT_RELENT: 3432 s = score_elf_rel_dyn_section (dynobj, FALSE); 3433 BFD_ASSERT (s != NULL); 3434 dyn.d_un.d_val = SCORE_ELF_REL_SIZE (dynobj); 3435 break; 3436 3437 case DT_STRSZ: 3438 /* Rewrite DT_STRSZ. */ 3439 dyn.d_un.d_val = _bfd_elf_strtab_size (elf_hash_table (info)->dynstr); 3440 break; 3441 3442 case DT_PLTGOT: 3443 name = ".got"; 3444 s = bfd_get_section_by_name (output_bfd, name); 3445 BFD_ASSERT (s != NULL); 3446 dyn.d_un.d_ptr = s->vma; 3447 break; 3448 3449 case DT_SCORE_BASE_ADDRESS: 3450 s = output_bfd->sections; 3451 BFD_ASSERT (s != NULL); 3452 dyn.d_un.d_ptr = s->vma & ~(bfd_vma) 0xffff; 3453 break; 3454 3455 case DT_SCORE_LOCAL_GOTNO: 3456 dyn.d_un.d_val = g->local_gotno; 3457 break; 3458 3459 case DT_SCORE_UNREFEXTNO: 3460 /* The index into the dynamic symbol table which is the 3461 entry of the first external symbol that is not 3462 referenced within the same object. */ 3463 dyn.d_un.d_val = bfd_count_sections (output_bfd) + 1; 3464 break; 3465 3466 case DT_SCORE_GOTSYM: 3467 if (g->global_gotsym) 3468 { 3469 dyn.d_un.d_val = g->global_gotsym->dynindx; 3470 break; 3471 } 3472 /* In case if we don't have global got symbols we default 3473 to setting DT_SCORE_GOTSYM to the same value as 3474 DT_SCORE_SYMTABNO, so we just fall through. */ 3475 3476 case DT_SCORE_SYMTABNO: 3477 name = ".dynsym"; 3478 elemsize = SCORE_ELF_SYM_SIZE (output_bfd); 3479 s = bfd_get_section_by_name (output_bfd, name); 3480 BFD_ASSERT (s != NULL); 3481 3482 dyn.d_un.d_val = s->size / elemsize; 3483 break; 3484 3485 case DT_SCORE_HIPAGENO: 3486 dyn.d_un.d_val = g->local_gotno - SCORE_RESERVED_GOTNO; 3487 break; 3488 3489 default: 3490 swap_out_p = FALSE; 3491 break; 3492 } 3493 3494 if (swap_out_p) 3495 (*get_elf_backend_data (dynobj)->s->swap_dyn_out) (dynobj, &dyn, b); 3496 } 3497 } 3498 3499 /* The first entry of the global offset table will be filled at 3500 runtime. The second entry will be used by some runtime loaders. 3501 This isn't the case of IRIX rld. */ 3502 if (sgot != NULL && sgot->size > 0) 3503 { 3504 bfd_put_32 (output_bfd, 0, sgot->contents); 3505 bfd_put_32 (output_bfd, 0x80000000, sgot->contents + SCORE_ELF_GOT_SIZE (output_bfd)); 3506 } 3507 3508 if (sgot != NULL) 3509 elf_section_data (sgot->output_section)->this_hdr.sh_entsize 3510 = SCORE_ELF_GOT_SIZE (output_bfd); 3511 3512 3513 /* We need to sort the entries of the dynamic relocation section. */ 3514 s = score_elf_rel_dyn_section (dynobj, FALSE); 3515 3516 if (s != NULL && s->size > (bfd_vma)2 * SCORE_ELF_REL_SIZE (output_bfd)) 3517 { 3518 reldyn_sorting_bfd = output_bfd; 3519 qsort ((Elf32_External_Rel *) s->contents + 1, s->reloc_count - 1, 3520 sizeof (Elf32_External_Rel), score_elf_sort_dynamic_relocs); 3521 } 3522 3523 return TRUE; 3524 } 3525 3526 /* This function set up the ELF section header for a BFD section in preparation for writing 3527 it out. This is where the flags and type fields are set for unusual sections. */ 3528 3529 bfd_boolean 3530 s7_bfd_score_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED, 3531 Elf_Internal_Shdr *hdr, 3532 asection *sec) 3533 { 3534 const char *name; 3535 3536 name = bfd_get_section_name (abfd, sec); 3537 3538 if (strcmp (name, ".got") == 0 3539 || strcmp (name, ".srdata") == 0 3540 || strcmp (name, ".sdata") == 0 3541 || strcmp (name, ".sbss") == 0) 3542 hdr->sh_flags |= SHF_SCORE_GPREL; 3543 3544 return TRUE; 3545 } 3546 3547 /* This function do additional processing on the ELF section header before writing 3548 it out. This is used to set the flags and type fields for some sections. */ 3549 3550 /* assign_file_positions_except_relocs() check section flag and if it is allocatable, 3551 warning message will be issued. backend_fake_section is called before 3552 assign_file_positions_except_relocs(); backend_section_processing after it. so, we 3553 modify section flag there, but not backend_fake_section. */ 3554 3555 bfd_boolean 3556 s7_bfd_score_elf_section_processing (bfd *abfd ATTRIBUTE_UNUSED, Elf_Internal_Shdr *hdr) 3557 { 3558 if (hdr->bfd_section != NULL) 3559 { 3560 const char *name = bfd_get_section_name (abfd, hdr->bfd_section); 3561 3562 if (strcmp (name, ".sdata") == 0) 3563 { 3564 hdr->sh_flags |= SHF_ALLOC | SHF_WRITE | SHF_SCORE_GPREL; 3565 hdr->sh_type = SHT_PROGBITS; 3566 } 3567 else if (strcmp (name, ".sbss") == 0) 3568 { 3569 hdr->sh_flags |= SHF_ALLOC | SHF_WRITE | SHF_SCORE_GPREL; 3570 hdr->sh_type = SHT_NOBITS; 3571 } 3572 else if (strcmp (name, ".srdata") == 0) 3573 { 3574 hdr->sh_flags |= SHF_ALLOC | SHF_SCORE_GPREL; 3575 hdr->sh_type = SHT_PROGBITS; 3576 } 3577 } 3578 3579 return TRUE; 3580 } 3581 3582 bfd_boolean 3583 s7_bfd_score_elf_write_section (bfd *output_bfd, asection *sec, bfd_byte *contents) 3584 { 3585 bfd_byte *to, *from, *end; 3586 int i; 3587 3588 if (strcmp (sec->name, ".pdr") != 0) 3589 return FALSE; 3590 3591 if (score_elf_section_data (sec)->u.tdata == NULL) 3592 return FALSE; 3593 3594 to = contents; 3595 end = contents + sec->size; 3596 for (from = contents, i = 0; from < end; from += PDR_SIZE, i++) 3597 { 3598 if ((score_elf_section_data (sec)->u.tdata)[i] == 1) 3599 continue; 3600 3601 if (to != from) 3602 memcpy (to, from, PDR_SIZE); 3603 3604 to += PDR_SIZE; 3605 } 3606 bfd_set_section_contents (output_bfd, sec->output_section, contents, 3607 (file_ptr) sec->output_offset, sec->size); 3608 3609 return TRUE; 3610 } 3611 3612 /* Copy data from a SCORE ELF indirect symbol to its direct symbol, hiding the old 3613 indirect symbol. Process additional relocation information. */ 3614 3615 void 3616 s7_bfd_score_elf_copy_indirect_symbol (struct bfd_link_info *info, 3617 struct elf_link_hash_entry *dir, 3618 struct elf_link_hash_entry *ind) 3619 { 3620 struct score_elf_link_hash_entry *dirscore, *indscore; 3621 3622 _bfd_elf_link_hash_copy_indirect (info, dir, ind); 3623 3624 if (ind->root.type != bfd_link_hash_indirect) 3625 return; 3626 3627 dirscore = (struct score_elf_link_hash_entry *) dir; 3628 indscore = (struct score_elf_link_hash_entry *) ind; 3629 dirscore->possibly_dynamic_relocs += indscore->possibly_dynamic_relocs; 3630 3631 if (indscore->readonly_reloc) 3632 dirscore->readonly_reloc = TRUE; 3633 3634 if (indscore->no_fn_stub) 3635 dirscore->no_fn_stub = TRUE; 3636 } 3637 3638 /* Remove information about discarded functions from other sections which mention them. */ 3639 3640 bfd_boolean 3641 s7_bfd_score_elf_discard_info (bfd *abfd, 3642 struct elf_reloc_cookie *cookie, 3643 struct bfd_link_info *info) 3644 { 3645 asection *o; 3646 bfd_boolean ret = FALSE; 3647 unsigned char *tdata; 3648 size_t i, skip; 3649 3650 o = bfd_get_section_by_name (abfd, ".pdr"); 3651 if ((!o) || (o->size == 0) || (o->size % PDR_SIZE != 0) 3652 || (o->output_section != NULL && bfd_is_abs_section (o->output_section))) 3653 return FALSE; 3654 3655 tdata = bfd_zmalloc (o->size / PDR_SIZE); 3656 if (!tdata) 3657 return FALSE; 3658 3659 cookie->rels = _bfd_elf_link_read_relocs (abfd, o, NULL, NULL, info->keep_memory); 3660 if (!cookie->rels) 3661 { 3662 free (tdata); 3663 return FALSE; 3664 } 3665 3666 cookie->rel = cookie->rels; 3667 cookie->relend = cookie->rels + o->reloc_count; 3668 3669 for (i = 0, skip = 0; i < o->size; i++) 3670 { 3671 if (bfd_elf_reloc_symbol_deleted_p (i * PDR_SIZE, cookie)) 3672 { 3673 tdata[i] = 1; 3674 skip++; 3675 } 3676 } 3677 3678 if (skip != 0) 3679 { 3680 score_elf_section_data (o)->u.tdata = tdata; 3681 o->size -= skip * PDR_SIZE; 3682 ret = TRUE; 3683 } 3684 else 3685 free (tdata); 3686 3687 if (!info->keep_memory) 3688 free (cookie->rels); 3689 3690 return ret; 3691 } 3692 3693 /* Signal that discard_info() has removed the discarded relocations for this section. */ 3694 3695 bfd_boolean 3696 s7_bfd_score_elf_ignore_discarded_relocs (asection *sec) 3697 { 3698 if (strcmp (sec->name, ".pdr") == 0) 3699 return TRUE; 3700 return FALSE; 3701 } 3702 3703 /* Return the section that should be marked against GC for a given 3704 relocation. */ 3705 3706 asection * 3707 s7_bfd_score_elf_gc_mark_hook (asection *sec, 3708 struct bfd_link_info *info, 3709 Elf_Internal_Rela *rel, 3710 struct elf_link_hash_entry *h, 3711 Elf_Internal_Sym *sym) 3712 { 3713 if (h != NULL) 3714 switch (ELF32_R_TYPE (rel->r_info)) 3715 { 3716 case R_SCORE_GNU_VTINHERIT: 3717 case R_SCORE_GNU_VTENTRY: 3718 return NULL; 3719 } 3720 3721 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 3722 } 3723 3724 /* Support for core dump NOTE sections. */ 3725 3726 bfd_boolean 3727 s7_bfd_score_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) 3728 { 3729 int offset; 3730 unsigned int raw_size; 3731 3732 switch (note->descsz) 3733 { 3734 default: 3735 return FALSE; 3736 case 272: /* Linux/Score elf_prstatus */ 3737 3738 /* pr_cursig */ 3739 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); 3740 3741 /* pr_pid */ 3742 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); 3743 3744 /* pr_reg */ 3745 offset = 72; 3746 3747 /* sizeof(elf_gregset_t) */ 3748 raw_size = 196; 3749 3750 break; 3751 } 3752 3753 /* Make a ".reg/999" section. */ 3754 return _bfd_elfcore_make_pseudosection (abfd, ".reg", raw_size, 3755 note->descpos + offset); 3756 } 3757 3758 bfd_boolean 3759 s7_bfd_score_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) 3760 { 3761 switch (note->descsz) 3762 { 3763 default: 3764 return FALSE; 3765 3766 case 128: /* Linux/Score elf_prpsinfo. */ 3767 /* pr_fname */ 3768 elf_tdata (abfd)->core->program 3769 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16); 3770 3771 /* pr_psargs */ 3772 elf_tdata (abfd)->core->command 3773 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80); 3774 break; 3775 } 3776 3777 /* Note that for some reason, a spurious space is tacked 3778 onto the end of the args in some (at least one anyway) 3779 implementations, so strip it off if it exists. */ 3780 3781 { 3782 char *command = elf_tdata (abfd)->core->command; 3783 int n = strlen (command); 3784 3785 if (0 < n && command[n - 1] == ' ') 3786 command[n - 1] = '\0'; 3787 } 3788 3789 return TRUE; 3790 } 3791 3792 3793 /* Score BFD functions. */ 3794 3795 reloc_howto_type * 3796 s7_elf32_score_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, bfd_reloc_code_real_type code) 3797 { 3798 unsigned int i; 3799 3800 for (i = 0; i < ARRAY_SIZE (elf32_score_reloc_map); i++) 3801 if (elf32_score_reloc_map[i].bfd_reloc_val == code) 3802 return &elf32_score_howto_table[elf32_score_reloc_map[i].elf_reloc_val]; 3803 3804 return NULL; 3805 } 3806 3807 bfd_boolean 3808 s7_elf32_score_print_private_bfd_data (bfd *abfd, void * ptr) 3809 { 3810 FILE *file = (FILE *) ptr; 3811 3812 BFD_ASSERT (abfd != NULL && ptr != NULL); 3813 3814 /* Print normal ELF private data. */ 3815 _bfd_elf_print_private_bfd_data (abfd, ptr); 3816 3817 /* xgettext:c-format */ 3818 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); 3819 if (elf_elfheader (abfd)->e_flags & EF_SCORE_PIC) 3820 { 3821 fprintf (file, _(" [pic]")); 3822 } 3823 if (elf_elfheader (abfd)->e_flags & EF_SCORE_FIXDEP) 3824 { 3825 fprintf (file, _(" [fix dep]")); 3826 } 3827 fputc ('\n', file); 3828 3829 return TRUE; 3830 } 3831 3832 bfd_boolean 3833 s7_elf32_score_merge_private_bfd_data (bfd *ibfd, bfd *obfd) 3834 { 3835 flagword in_flags; 3836 flagword out_flags; 3837 3838 if (!_bfd_generic_verify_endian_match (ibfd, obfd)) 3839 return FALSE; 3840 3841 in_flags = elf_elfheader (ibfd)->e_flags; 3842 out_flags = elf_elfheader (obfd)->e_flags; 3843 3844 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour 3845 || bfd_get_flavour (obfd) != bfd_target_elf_flavour) 3846 return TRUE; 3847 3848 in_flags = elf_elfheader (ibfd)->e_flags; 3849 out_flags = elf_elfheader (obfd)->e_flags; 3850 3851 if (! elf_flags_init (obfd)) 3852 { 3853 elf_flags_init (obfd) = TRUE; 3854 elf_elfheader (obfd)->e_flags = in_flags; 3855 3856 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) 3857 && bfd_get_arch_info (obfd)->the_default) 3858 { 3859 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd)); 3860 } 3861 3862 return TRUE; 3863 } 3864 3865 if (((in_flags & EF_SCORE_PIC) != 0) != ((out_flags & EF_SCORE_PIC) != 0)) 3866 { 3867 (*_bfd_error_handler) (_("%B: warning: linking PIC files with non-PIC files"), ibfd); 3868 } 3869 3870 /* Maybe dependency fix compatibility should be checked here. */ 3871 return TRUE; 3872 } 3873 3874 bfd_boolean 3875 s7_elf32_score_new_section_hook (bfd *abfd, asection *sec) 3876 { 3877 struct _score_elf_section_data *sdata; 3878 bfd_size_type amt = sizeof (*sdata); 3879 3880 sdata = bfd_zalloc (abfd, amt); 3881 if (sdata == NULL) 3882 return FALSE; 3883 sec->used_by_bfd = sdata; 3884 3885 return _bfd_elf_new_section_hook (abfd, sec); 3886 } 3887 3888 #define elf_backend_omit_section_dynsym \ 3889 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true) 3890
Indexes created Sun May 03 00:22:47 UTC 2026