1 /* 32-bit ELF support for S+core. 2 Copyright 2009, 2010, 2011, 2012 Free Software Foundation, Inc. 3 Contributed by 4 Brain.lin (brain.lin@sunplusct.com) 5 Mei Ligang (ligang@sunnorth.com.cn) 6 Pei-Lin Tsai (pltsai@sunplus.com) 7 8 This file is part of BFD, the Binary File Descriptor library. 9 10 This program is free software; you can redistribute it and/or modify 11 it under the terms of the GNU General Public License as published by 12 the Free Software Foundation; either version 3 of the License, or 13 (at your option) any later version. 14 15 This program is distributed in the hope that it will be useful, 16 but WITHOUT ANY WARRANTY; without even the implied warranty of 17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 GNU General Public License for more details. 19 20 You should have received a copy of the GNU General Public License 21 along with this program; if not, write to the Free Software 22 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 23 MA 02110-1301, USA. */ 24 25 #include "sysdep.h" 26 #include "bfd.h" 27 #include "libbfd.h" 28 #include "libiberty.h" 29 #include "elf-bfd.h" 30 #include "elf/score.h" 31 #include "elf/common.h" 32 #include "elf/internal.h" 33 #include "hashtab.h" 34 #include "elf32-score.h" 35 36 37 /* The SCORE ELF linker needs additional information for each symbol in 38 the global hash table. */ 39 struct score_elf_link_hash_entry 40 { 41 struct elf_link_hash_entry root; 42 43 /* Number of R_SCORE_ABS32, R_SCORE_REL32 relocs against this symbol. */ 44 unsigned int possibly_dynamic_relocs; 45 46 /* If the R_SCORE_ABS32, R_SCORE_REL32 reloc is against a readonly section. */ 47 bfd_boolean readonly_reloc; 48 49 /* We must not create a stub for a symbol that has relocations related to 50 taking the function's address, i.e. any but R_SCORE_CALL15 ones. */ 51 bfd_boolean no_fn_stub; 52 53 /* Are we forced local? This will only be set if we have converted 54 the initial global GOT entry to a local GOT entry. */ 55 bfd_boolean forced_local; 56 }; 57 58 /* Traverse a score ELF linker hash table. */ 59 #define score_elf_link_hash_traverse(table, func, info) \ 60 (elf_link_hash_traverse \ 61 ((table), \ 62 (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \ 63 (info))) 64 65 /* This structure is used to hold .got entries while estimating got sizes. */ 66 struct score_got_entry 67 { 68 /* The input bfd in which the symbol is defined. */ 69 bfd *abfd; 70 /* The index of the symbol, as stored in the relocation r_info, if 71 we have a local symbol; -1 otherwise. */ 72 long symndx; 73 union 74 { 75 /* If abfd == NULL, an address that must be stored in the got. */ 76 bfd_vma address; 77 /* If abfd != NULL && symndx != -1, the addend of the relocation 78 that should be added to the symbol value. */ 79 bfd_vma addend; 80 /* If abfd != NULL && symndx == -1, the hash table entry 81 corresponding to a global symbol in the got (or, local, if 82 h->forced_local). */ 83 struct score_elf_link_hash_entry *h; 84 } d; 85 86 /* The offset from the beginning of the .got section to the entry 87 corresponding to this symbol+addend. If it's a global symbol 88 whose offset is yet to be decided, it's going to be -1. */ 89 long gotidx; 90 }; 91 92 /* This structure is passed to score_elf_sort_hash_table_f when sorting 93 the dynamic symbols. */ 94 struct score_elf_hash_sort_data 95 { 96 /* The symbol in the global GOT with the lowest dynamic symbol table index. */ 97 struct elf_link_hash_entry *low; 98 /* The least dynamic symbol table index corresponding to a symbol with a GOT entry. */ 99 long min_got_dynindx; 100 /* The greatest dynamic symbol table index corresponding to a symbol 101 with a GOT entry that is not referenced (e.g., a dynamic symbol 102 with dynamic relocations pointing to it from non-primary GOTs). */ 103 long max_unref_got_dynindx; 104 /* The greatest dynamic symbol table index not corresponding to a 105 symbol without a GOT entry. */ 106 long max_non_got_dynindx; 107 }; 108 109 struct score_got_info 110 { 111 /* The global symbol in the GOT with the lowest index in the dynamic 112 symbol table. */ 113 struct elf_link_hash_entry *global_gotsym; 114 /* The number of global .got entries. */ 115 unsigned int global_gotno; 116 /* The number of local .got entries. */ 117 unsigned int local_gotno; 118 /* The number of local .got entries we have used. */ 119 unsigned int assigned_gotno; 120 /* A hash table holding members of the got. */ 121 struct htab *got_entries; 122 /* In multi-got links, a pointer to the next got (err, rather, most 123 of the time, it points to the previous got). */ 124 struct score_got_info *next; 125 }; 126 127 /* A structure used to count GOT entries, for GOT entry or ELF symbol table traversal. */ 128 struct _score_elf_section_data 129 { 130 struct bfd_elf_section_data elf; 131 union 132 { 133 struct score_got_info *got_info; 134 bfd_byte *tdata; 135 } 136 u; 137 }; 138 139 #define score_elf_section_data(sec) \ 140 ((struct _score_elf_section_data *) elf_section_data (sec)) 141 142 /* The size of a symbol-table entry. */ 143 #define SCORE_ELF_SYM_SIZE(abfd) \ 144 (get_elf_backend_data (abfd)->s->sizeof_sym) 145 146 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value 147 from smaller values. Start with zero, widen, *then* decrement. */ 148 #define MINUS_ONE (((bfd_vma)0) - 1) 149 #define MINUS_TWO (((bfd_vma)0) - 2) 150 151 #define PDR_SIZE 32 152 153 154 /* The number of local .got entries we reserve. */ 155 #define SCORE_RESERVED_GOTNO (2) 156 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" 157 158 /* The offset of $gp from the beginning of the .got section. */ 159 #define ELF_SCORE_GP_OFFSET(abfd) (0x3ff0) 160 161 /* The maximum size of the GOT for it to be addressable using 15-bit offsets from $gp. */ 162 #define SCORE_ELF_GOT_MAX_SIZE(abfd) (ELF_SCORE_GP_OFFSET(abfd) + 0x3fff) 163 164 #define SCORE_ELF_STUB_SECTION_NAME (".SCORE.stub") 165 #define SCORE_FUNCTION_STUB_SIZE (16) 166 167 #define STUB_LW 0xc3bcc010 /* lw r29, [r28, -0x3ff0] */ 168 #define STUB_MOVE 0x8323bc56 /* mv r25, r3 */ 169 #define STUB_LI16 0x87548000 /* ori r26, .dynsym_index */ 170 #define STUB_BRL 0x801dbc09 /* brl r29 */ 171 172 #define SCORE_ELF_GOT_SIZE(abfd) \ 173 (get_elf_backend_data (abfd)->s->arch_size / 8) 174 175 #define SCORE_ELF_ADD_DYNAMIC_ENTRY(info, tag, val) \ 176 (_bfd_elf_add_dynamic_entry (info, (bfd_vma) tag, (bfd_vma) val)) 177 178 /* The size of an external dynamic table entry. */ 179 #define SCORE_ELF_DYN_SIZE(abfd) \ 180 (get_elf_backend_data (abfd)->s->sizeof_dyn) 181 182 /* The size of an external REL relocation. */ 183 #define SCORE_ELF_REL_SIZE(abfd) \ 184 (get_elf_backend_data (abfd)->s->sizeof_rel) 185 186 /* The default alignment for sections, as a power of two. */ 187 #define SCORE_ELF_LOG_FILE_ALIGN(abfd)\ 188 (get_elf_backend_data (abfd)->s->log_file_align) 189 190 static bfd_byte *hi16_rel_addr; 191 192 /* This will be used when we sort the dynamic relocation records. */ 193 static bfd *reldyn_sorting_bfd; 194 195 /* SCORE ELF uses two common sections. One is the usual one, and the 196 other is for small objects. All the small objects are kept 197 together, and then referenced via the gp pointer, which yields 198 faster assembler code. This is what we use for the small common 199 section. This approach is copied from ecoff.c. */ 200 static asection score_elf_scom_section; 201 static asymbol score_elf_scom_symbol; 202 static asymbol * score_elf_scom_symbol_ptr; 203 204 static bfd_reloc_status_type 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 0, /* 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 (info->shared && ! bfd_elf_link_record_dynamic_symbol (info, h)) 1309 return FALSE; 1310 1311 amt = sizeof (struct score_got_info); 1312 g = bfd_alloc (abfd, amt); 1313 if (g == NULL) 1314 return FALSE; 1315 1316 g->global_gotsym = NULL; 1317 g->global_gotno = 0; 1318 1319 g->local_gotno = SCORE_RESERVED_GOTNO; 1320 g->assigned_gotno = SCORE_RESERVED_GOTNO; 1321 g->next = NULL; 1322 1323 g->got_entries = htab_try_create (1, score_elf_got_entry_hash, 1324 score_elf_got_entry_eq, NULL); 1325 if (g->got_entries == NULL) 1326 return FALSE; 1327 score_elf_section_data (s)->u.got_info = g; 1328 score_elf_section_data (s)->elf.this_hdr.sh_flags |= SHF_ALLOC | SHF_WRITE | SHF_SCORE_GPREL; 1329 1330 return TRUE; 1331 } 1332 1333 /* Calculate the %high function. */ 1334 1335 static bfd_vma 1336 score_elf_high (bfd_vma value) 1337 { 1338 return ((value + (bfd_vma) 0x8000) >> 16) & 0xffff; 1339 } 1340 1341 /* Create a local GOT entry for VALUE. Return the index of the entry, 1342 or -1 if it could not be created. */ 1343 1344 static struct score_got_entry * 1345 score_elf_create_local_got_entry (bfd *abfd, 1346 bfd *ibfd ATTRIBUTE_UNUSED, 1347 struct score_got_info *gg, 1348 asection *sgot, bfd_vma value, 1349 unsigned long r_symndx ATTRIBUTE_UNUSED, 1350 struct score_elf_link_hash_entry *h ATTRIBUTE_UNUSED, 1351 int r_type ATTRIBUTE_UNUSED) 1352 { 1353 struct score_got_entry entry, **loc; 1354 struct score_got_info *g; 1355 1356 entry.abfd = NULL; 1357 entry.symndx = -1; 1358 entry.d.address = value; 1359 1360 g = gg; 1361 loc = (struct score_got_entry **) htab_find_slot (g->got_entries, &entry, INSERT); 1362 if (*loc) 1363 return *loc; 1364 1365 entry.gotidx = SCORE_ELF_GOT_SIZE (abfd) * g->assigned_gotno++; 1366 1367 *loc = bfd_alloc (abfd, sizeof entry); 1368 1369 if (! *loc) 1370 return NULL; 1371 1372 memcpy (*loc, &entry, sizeof entry); 1373 1374 if (g->assigned_gotno >= g->local_gotno) 1375 { 1376 (*loc)->gotidx = -1; 1377 /* We didn't allocate enough space in the GOT. */ 1378 (*_bfd_error_handler) 1379 (_("not enough GOT space for local GOT entries")); 1380 bfd_set_error (bfd_error_bad_value); 1381 return NULL; 1382 } 1383 1384 bfd_put_32 (abfd, value, (sgot->contents + entry.gotidx)); 1385 1386 return *loc; 1387 } 1388 1389 /* Find a GOT entry whose higher-order 16 bits are the same as those 1390 for value. Return the index into the GOT for this entry. */ 1391 1392 static bfd_vma 1393 score_elf_got16_entry (bfd *abfd, bfd *ibfd, struct bfd_link_info *info, 1394 bfd_vma value, bfd_boolean external) 1395 { 1396 asection *sgot; 1397 struct score_got_info *g; 1398 struct score_got_entry *entry; 1399 1400 if (!external) 1401 { 1402 /* Although the ABI says that it is "the high-order 16 bits" that we 1403 want, it is really the %high value. The complete value is 1404 calculated with a `addiu' of a LO16 relocation, just as with a 1405 HI16/LO16 pair. */ 1406 value = score_elf_high (value) << 16; 1407 } 1408 1409 g = score_elf_got_info (elf_hash_table (info)->dynobj, &sgot); 1410 1411 entry = score_elf_create_local_got_entry (abfd, ibfd, g, sgot, value, 0, NULL, 1412 R_SCORE_GOT15); 1413 if (entry) 1414 return entry->gotidx; 1415 else 1416 return MINUS_ONE; 1417 } 1418 1419 void 1420 s7_bfd_score_elf_hide_symbol (struct bfd_link_info *info, 1421 struct elf_link_hash_entry *entry, 1422 bfd_boolean force_local) 1423 { 1424 bfd *dynobj; 1425 asection *got; 1426 struct score_got_info *g; 1427 struct score_elf_link_hash_entry *h; 1428 1429 h = (struct score_elf_link_hash_entry *) entry; 1430 if (h->forced_local) 1431 return; 1432 h->forced_local = TRUE; 1433 1434 dynobj = elf_hash_table (info)->dynobj; 1435 if (dynobj != NULL && force_local) 1436 { 1437 got = score_elf_got_section (dynobj, FALSE); 1438 if (got == NULL) 1439 return; 1440 g = score_elf_section_data (got)->u.got_info; 1441 1442 if (g->next) 1443 { 1444 struct score_got_entry e; 1445 struct score_got_info *gg = g; 1446 1447 /* Since we're turning what used to be a global symbol into a 1448 local one, bump up the number of local entries of each GOT 1449 that had an entry for it. This will automatically decrease 1450 the number of global entries, since global_gotno is actually 1451 the upper limit of global entries. */ 1452 e.abfd = dynobj; 1453 e.symndx = -1; 1454 e.d.h = h; 1455 1456 for (g = g->next; g != gg; g = g->next) 1457 if (htab_find (g->got_entries, &e)) 1458 { 1459 BFD_ASSERT (g->global_gotno > 0); 1460 g->local_gotno++; 1461 g->global_gotno--; 1462 } 1463 1464 /* If this was a global symbol forced into the primary GOT, we 1465 no longer need an entry for it. We can't release the entry 1466 at this point, but we must at least stop counting it as one 1467 of the symbols that required a forced got entry. */ 1468 if (h->root.got.offset == 2) 1469 { 1470 BFD_ASSERT (gg->assigned_gotno > 0); 1471 gg->assigned_gotno--; 1472 } 1473 } 1474 else if (g->global_gotno == 0 && g->global_gotsym == NULL) 1475 /* If we haven't got through GOT allocation yet, just bump up the 1476 number of local entries, as this symbol won't be counted as 1477 global. */ 1478 g->local_gotno++; 1479 else if (h->root.got.offset == 1) 1480 { 1481 /* If we're past non-multi-GOT allocation and this symbol had 1482 been marked for a global got entry, give it a local entry 1483 instead. */ 1484 BFD_ASSERT (g->global_gotno > 0); 1485 g->local_gotno++; 1486 g->global_gotno--; 1487 } 1488 } 1489 1490 _bfd_elf_link_hash_hide_symbol (info, &h->root, force_local); 1491 } 1492 1493 /* If H is a symbol that needs a global GOT entry, but has a dynamic 1494 symbol table index lower than any we've seen to date, record it for 1495 posterity. */ 1496 1497 static bfd_boolean 1498 score_elf_record_global_got_symbol (struct elf_link_hash_entry *h, 1499 bfd *abfd, 1500 struct bfd_link_info *info, 1501 struct score_got_info *g) 1502 { 1503 struct score_got_entry entry, **loc; 1504 1505 /* A global symbol in the GOT must also be in the dynamic symbol table. */ 1506 if (h->dynindx == -1) 1507 { 1508 switch (ELF_ST_VISIBILITY (h->other)) 1509 { 1510 case STV_INTERNAL: 1511 case STV_HIDDEN: 1512 s7_bfd_score_elf_hide_symbol (info, h, TRUE); 1513 break; 1514 } 1515 if (!bfd_elf_link_record_dynamic_symbol (info, h)) 1516 return FALSE; 1517 } 1518 1519 entry.abfd = abfd; 1520 entry.symndx = -1; 1521 entry.d.h = (struct score_elf_link_hash_entry *) h; 1522 1523 loc = (struct score_got_entry **) htab_find_slot (g->got_entries, &entry, INSERT); 1524 1525 /* If we've already marked this entry as needing GOT space, we don't 1526 need to do it again. */ 1527 if (*loc) 1528 return TRUE; 1529 1530 *loc = bfd_alloc (abfd, sizeof entry); 1531 if (! *loc) 1532 return FALSE; 1533 1534 entry.gotidx = -1; 1535 1536 memcpy (*loc, &entry, sizeof (entry)); 1537 1538 if (h->got.offset != MINUS_ONE) 1539 return TRUE; 1540 1541 /* By setting this to a value other than -1, we are indicating that 1542 there needs to be a GOT entry for H. Avoid using zero, as the 1543 generic ELF copy_indirect_symbol tests for <= 0. */ 1544 h->got.offset = 1; 1545 1546 return TRUE; 1547 } 1548 1549 /* Reserve space in G for a GOT entry containing the value of symbol 1550 SYMNDX in input bfd ABDF, plus ADDEND. */ 1551 1552 static bfd_boolean 1553 score_elf_record_local_got_symbol (bfd *abfd, 1554 long symndx, 1555 bfd_vma addend, 1556 struct score_got_info *g) 1557 { 1558 struct score_got_entry entry, **loc; 1559 1560 entry.abfd = abfd; 1561 entry.symndx = symndx; 1562 entry.d.addend = addend; 1563 loc = (struct score_got_entry **) htab_find_slot (g->got_entries, &entry, INSERT); 1564 1565 if (*loc) 1566 return TRUE; 1567 1568 entry.gotidx = g->local_gotno++; 1569 1570 *loc = bfd_alloc (abfd, sizeof(entry)); 1571 if (! *loc) 1572 return FALSE; 1573 1574 memcpy (*loc, &entry, sizeof (entry)); 1575 1576 return TRUE; 1577 } 1578 1579 /* Returns the GOT offset at which the indicated address can be found. 1580 If there is not yet a GOT entry for this value, create one. 1581 Returns -1 if no satisfactory GOT offset can be found. */ 1582 1583 static bfd_vma 1584 score_elf_local_got_index (bfd *abfd, bfd *ibfd, struct bfd_link_info *info, 1585 bfd_vma value, unsigned long r_symndx, 1586 struct score_elf_link_hash_entry *h, int r_type) 1587 { 1588 asection *sgot; 1589 struct score_got_info *g; 1590 struct score_got_entry *entry; 1591 1592 g = score_elf_got_info (elf_hash_table (info)->dynobj, &sgot); 1593 1594 entry = score_elf_create_local_got_entry (abfd, ibfd, g, sgot, value, 1595 r_symndx, h, r_type); 1596 if (!entry) 1597 return MINUS_ONE; 1598 1599 else 1600 return entry->gotidx; 1601 } 1602 1603 /* Returns the GOT index for the global symbol indicated by H. */ 1604 1605 static bfd_vma 1606 score_elf_global_got_index (bfd *abfd, struct elf_link_hash_entry *h) 1607 { 1608 bfd_vma got_index; 1609 asection *sgot; 1610 struct score_got_info *g; 1611 long global_got_dynindx = 0; 1612 1613 g = score_elf_got_info (abfd, &sgot); 1614 if (g->global_gotsym != NULL) 1615 global_got_dynindx = g->global_gotsym->dynindx; 1616 1617 /* Once we determine the global GOT entry with the lowest dynamic 1618 symbol table index, we must put all dynamic symbols with greater 1619 indices into the GOT. That makes it easy to calculate the GOT 1620 offset. */ 1621 BFD_ASSERT (h->dynindx >= global_got_dynindx); 1622 got_index = ((h->dynindx - global_got_dynindx + g->local_gotno) * SCORE_ELF_GOT_SIZE (abfd)); 1623 BFD_ASSERT (got_index < sgot->size); 1624 1625 return got_index; 1626 } 1627 1628 /* Returns the offset for the entry at the INDEXth position in the GOT. */ 1629 1630 static bfd_vma 1631 score_elf_got_offset_from_index (bfd *dynobj, 1632 bfd *output_bfd, 1633 bfd *input_bfd ATTRIBUTE_UNUSED, 1634 bfd_vma got_index) 1635 { 1636 asection *sgot; 1637 bfd_vma gp; 1638 1639 score_elf_got_info (dynobj, &sgot); 1640 gp = _bfd_get_gp_value (output_bfd); 1641 1642 return sgot->output_section->vma + sgot->output_offset + got_index - gp; 1643 } 1644 1645 /* Follow indirect and warning hash entries so that each got entry 1646 points to the final symbol definition. P must point to a pointer 1647 to the hash table we're traversing. Since this traversal may 1648 modify the hash table, we set this pointer to NULL to indicate 1649 we've made a potentially-destructive change to the hash table, so 1650 the traversal must be restarted. */ 1651 1652 static int 1653 score_elf_resolve_final_got_entry (void **entryp, void *p) 1654 { 1655 struct score_got_entry *entry = (struct score_got_entry *) *entryp; 1656 htab_t got_entries = *(htab_t *) p; 1657 1658 if (entry->abfd != NULL && entry->symndx == -1) 1659 { 1660 struct score_elf_link_hash_entry *h = entry->d.h; 1661 1662 while (h->root.root.type == bfd_link_hash_indirect 1663 || h->root.root.type == bfd_link_hash_warning) 1664 h = (struct score_elf_link_hash_entry *) h->root.root.u.i.link; 1665 1666 if (entry->d.h == h) 1667 return 1; 1668 1669 entry->d.h = h; 1670 1671 /* If we can't find this entry with the new bfd hash, re-insert 1672 it, and get the traversal restarted. */ 1673 if (! htab_find (got_entries, entry)) 1674 { 1675 htab_clear_slot (got_entries, entryp); 1676 entryp = htab_find_slot (got_entries, entry, INSERT); 1677 if (! *entryp) 1678 *entryp = entry; 1679 /* Abort the traversal, since the whole table may have 1680 moved, and leave it up to the parent to restart the 1681 process. */ 1682 *(htab_t *) p = NULL; 1683 return 0; 1684 } 1685 /* We might want to decrement the global_gotno count, but it's 1686 either too early or too late for that at this point. */ 1687 } 1688 1689 return 1; 1690 } 1691 1692 /* Turn indirect got entries in a got_entries table into their final locations. */ 1693 1694 static void 1695 score_elf_resolve_final_got_entries (struct score_got_info *g) 1696 { 1697 htab_t got_entries; 1698 1699 do 1700 { 1701 got_entries = g->got_entries; 1702 1703 htab_traverse (got_entries, 1704 score_elf_resolve_final_got_entry, 1705 &got_entries); 1706 } 1707 while (got_entries == NULL); 1708 } 1709 1710 /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. for -r */ 1711 1712 static void 1713 score_elf_add_to_rel (bfd *abfd, 1714 bfd_byte *address, 1715 reloc_howto_type *howto, 1716 bfd_signed_vma increment) 1717 { 1718 bfd_signed_vma addend; 1719 bfd_vma contents; 1720 unsigned long offset; 1721 unsigned long r_type = howto->type; 1722 unsigned long hi16_addend, hi16_offset, hi16_value, uvalue; 1723 1724 contents = bfd_get_32 (abfd, address); 1725 /* Get the (signed) value from the instruction. */ 1726 addend = contents & howto->src_mask; 1727 if (addend & ((howto->src_mask + 1) >> 1)) 1728 { 1729 bfd_signed_vma mask; 1730 1731 mask = -1; 1732 mask &= ~howto->src_mask; 1733 addend |= mask; 1734 } 1735 /* Add in the increment, (which is a byte value). */ 1736 switch (r_type) 1737 { 1738 case R_SCORE_PC19: 1739 offset = 1740 (((contents & howto->src_mask) & 0x3ff0000) >> 6) | ((contents & howto->src_mask) & 0x3ff); 1741 offset += increment; 1742 contents = 1743 (contents & ~howto-> 1744 src_mask) | (((offset << 6) & howto->src_mask) & 0x3ff0000) | (offset & 0x3ff); 1745 bfd_put_32 (abfd, contents, address); 1746 break; 1747 case R_SCORE_HI16: 1748 break; 1749 case R_SCORE_LO16: 1750 hi16_addend = bfd_get_32 (abfd, address - 4); 1751 hi16_offset = ((((hi16_addend >> 16) & 0x3) << 15) | (hi16_addend & 0x7fff)) >> 1; 1752 offset = ((((contents >> 16) & 0x3) << 15) | (contents & 0x7fff)) >> 1; 1753 offset = (hi16_offset << 16) | (offset & 0xffff); 1754 uvalue = increment + offset; 1755 hi16_offset = (uvalue >> 16) << 1; 1756 hi16_value = (hi16_addend & (~(howto->dst_mask))) 1757 | (hi16_offset & 0x7fff) | ((hi16_offset << 1) & 0x30000); 1758 bfd_put_32 (abfd, hi16_value, address - 4); 1759 offset = (uvalue & 0xffff) << 1; 1760 contents = (contents & (~(howto->dst_mask))) | (offset & 0x7fff) | ((offset << 1) & 0x30000); 1761 bfd_put_32 (abfd, contents, address); 1762 break; 1763 case R_SCORE_24: 1764 offset = 1765 (((contents & howto->src_mask) >> 1) & 0x1ff8000) | ((contents & howto->src_mask) & 0x7fff); 1766 offset += increment; 1767 contents = 1768 (contents & ~howto-> 1769 src_mask) | (((offset << 1) & howto->src_mask) & 0x3ff0000) | (offset & 0x7fff); 1770 bfd_put_32 (abfd, contents, address); 1771 break; 1772 case R_SCORE16_11: 1773 1774 contents = bfd_get_16 (abfd, address); 1775 offset = contents & howto->src_mask; 1776 offset += increment; 1777 contents = (contents & ~howto->src_mask) | (offset & howto->src_mask); 1778 bfd_put_16 (abfd, contents, address); 1779 1780 break; 1781 case R_SCORE16_PC8: 1782 1783 contents = bfd_get_16 (abfd, address); 1784 offset = (contents & howto->src_mask) + ((increment >> 1) & 0xff); 1785 contents = (contents & (~howto->src_mask)) | (offset & howto->src_mask); 1786 bfd_put_16 (abfd, contents, address); 1787 1788 break; 1789 case R_SCORE_GOT15: 1790 case R_SCORE_GOT_LO16: 1791 break; 1792 1793 default: 1794 addend += increment; 1795 contents = (contents & ~howto->dst_mask) | (addend & howto->dst_mask); 1796 bfd_put_32 (abfd, contents, address); 1797 break; 1798 } 1799 } 1800 1801 /* Perform a relocation as part of a final link. */ 1802 1803 static bfd_reloc_status_type 1804 score_elf_final_link_relocate (reloc_howto_type *howto, 1805 bfd *input_bfd, 1806 bfd *output_bfd, 1807 asection *input_section, 1808 bfd_byte *contents, 1809 Elf_Internal_Rela *rel, 1810 Elf_Internal_Rela *relocs, 1811 bfd_vma symbol, 1812 struct bfd_link_info *info, 1813 const char *sym_name ATTRIBUTE_UNUSED, 1814 int sym_flags ATTRIBUTE_UNUSED, 1815 struct score_elf_link_hash_entry *h, 1816 Elf_Internal_Sym *local_syms, 1817 asection **local_sections, 1818 bfd_boolean gp_disp_p) 1819 { 1820 unsigned long r_type; 1821 unsigned long r_symndx; 1822 bfd_byte *hit_data = contents + rel->r_offset; 1823 bfd_vma addend; 1824 /* The final GP value to be used for the relocatable, executable, or 1825 shared object file being produced. */ 1826 bfd_vma gp = MINUS_ONE; 1827 /* The place (section offset or address) of the storage unit being relocated. */ 1828 bfd_vma rel_addr; 1829 /* The value of GP used to create the relocatable object. */ 1830 bfd_vma gp0 = MINUS_ONE; 1831 /* The offset into the global offset table at which the address of the relocation entry 1832 symbol, adjusted by the addend, resides during execution. */ 1833 bfd_vma g = MINUS_ONE; 1834 /* TRUE if the symbol referred to by this relocation is a local symbol. */ 1835 bfd_boolean local_p; 1836 /* The eventual value we will relocate. */ 1837 bfd_vma value = symbol; 1838 unsigned long hi16_addend, hi16_offset, hi16_value, uvalue, offset, abs_value = 0; 1839 1840 Elf_Internal_Sym *sym = 0; 1841 asection *sec = NULL; 1842 bfd_boolean merge_p = 0; 1843 1844 1845 if (elf_gp (output_bfd) == 0) 1846 { 1847 struct bfd_link_hash_entry *bh; 1848 asection *o; 1849 1850 bh = bfd_link_hash_lookup (info->hash, "_gp", 0, 0, 1); 1851 if (bh != NULL && bh->type == bfd_link_hash_defined) 1852 elf_gp (output_bfd) = (bh->u.def.value 1853 + bh->u.def.section->output_section->vma 1854 + bh->u.def.section->output_offset); 1855 else if (info->relocatable) 1856 { 1857 bfd_vma lo = -1; 1858 1859 /* Find the GP-relative section with the lowest offset. */ 1860 for (o = output_bfd->sections; o != NULL; o = o->next) 1861 if (o->vma < lo) 1862 lo = o->vma; 1863 /* And calculate GP relative to that. */ 1864 elf_gp (output_bfd) = lo + ELF_SCORE_GP_OFFSET (input_bfd); 1865 } 1866 else 1867 { 1868 /* If the relocate_section function needs to do a reloc 1869 involving the GP value, it should make a reloc_dangerous 1870 callback to warn that GP is not defined. */ 1871 } 1872 } 1873 1874 /* Parse the relocation. */ 1875 r_symndx = ELF32_R_SYM (rel->r_info); 1876 r_type = ELF32_R_TYPE (rel->r_info); 1877 rel_addr = (input_section->output_section->vma + input_section->output_offset + rel->r_offset); 1878 1879 /* For hidden symbol. */ 1880 local_p = score_elf_local_relocation_p (input_bfd, rel, local_sections, FALSE); 1881 if (local_p) 1882 { 1883 sym = local_syms + r_symndx; 1884 sec = local_sections[r_symndx]; 1885 1886 symbol = sec->output_section->vma + sec->output_offset; 1887 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION 1888 || (sec->flags & SEC_MERGE)) 1889 symbol += sym->st_value; 1890 if ((sec->flags & SEC_MERGE) 1891 && ELF_ST_TYPE (sym->st_info) == STT_SECTION) 1892 merge_p = 1; 1893 } 1894 1895 if (r_type == R_SCORE_GOT15) 1896 { 1897 const Elf_Internal_Rela *relend; 1898 const Elf_Internal_Rela *lo16_rel; 1899 const struct elf_backend_data *bed; 1900 bfd_vma lo_value = 0; 1901 1902 bed = get_elf_backend_data (output_bfd); 1903 relend = relocs + input_section->reloc_count * bed->s->int_rels_per_ext_rel; 1904 lo16_rel = score_elf_next_relocation (input_bfd, R_SCORE_GOT_LO16, rel, relend); 1905 if ((local_p) && (lo16_rel != NULL)) 1906 { 1907 bfd_vma tmp = 0; 1908 tmp = bfd_get_32 (input_bfd, contents + lo16_rel->r_offset); 1909 lo_value = (((tmp >> 16) & 0x3) << 14) | ((tmp & 0x7fff) >> 1); 1910 if (merge_p) 1911 { 1912 asection *msec = sec; 1913 lo_value = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, lo_value); 1914 lo_value -= symbol; 1915 lo_value += msec->output_section->vma + msec->output_offset; 1916 } 1917 } 1918 addend = lo_value; 1919 } 1920 else 1921 { 1922 addend = (bfd_get_32 (input_bfd, hit_data) >> howto->bitpos) & howto->src_mask; 1923 } 1924 1925 /* Figure out the value of the symbol. */ 1926 if (local_p && !merge_p) 1927 { 1928 if (r_type == R_SCORE_GOT15) 1929 { 1930 const Elf_Internal_Rela *relend; 1931 const Elf_Internal_Rela *lo16_rel; 1932 const struct elf_backend_data *bed; 1933 bfd_vma lo_value = 0; 1934 1935 value = bfd_get_32 (input_bfd, contents + rel->r_offset); 1936 addend = value & 0x7fff; 1937 if ((addend & 0x4000) == 0x4000) 1938 addend |= 0xffffc000; 1939 1940 bed = get_elf_backend_data (output_bfd); 1941 relend = relocs + input_section->reloc_count * bed->s->int_rels_per_ext_rel; 1942 lo16_rel = score_elf_next_relocation (input_bfd, R_SCORE_GOT_LO16, rel, relend); 1943 if ((local_p) && (lo16_rel != NULL)) 1944 { 1945 bfd_vma tmp = 0; 1946 tmp = bfd_get_32 (input_bfd, contents + lo16_rel->r_offset); 1947 lo_value = (((tmp >> 16) & 0x3) << 14) | ((tmp & 0x7fff) >> 1); 1948 } 1949 1950 addend <<= 16; 1951 addend += lo_value; 1952 } 1953 } 1954 1955 local_p = score_elf_local_relocation_p (input_bfd, rel, local_sections, TRUE); 1956 1957 /* If we haven't already determined the GOT offset, or the GP value, 1958 and we're going to need it, get it now. */ 1959 switch (r_type) 1960 { 1961 case R_SCORE_CALL15: 1962 case R_SCORE_GOT15: 1963 if (!local_p) 1964 { 1965 g = score_elf_global_got_index (elf_hash_table (info)->dynobj, 1966 (struct elf_link_hash_entry *) h); 1967 if ((! elf_hash_table(info)->dynamic_sections_created 1968 || (info->shared 1969 && (info->symbolic || h->root.dynindx == -1) 1970 && h->root.def_regular))) 1971 { 1972 /* This is a static link or a -Bsymbolic link. The 1973 symbol is defined locally, or was forced to be local. 1974 We must initialize this entry in the GOT. */ 1975 bfd *tmpbfd = elf_hash_table (info)->dynobj; 1976 asection *sgot = score_elf_got_section (tmpbfd, FALSE); 1977 bfd_put_32 (tmpbfd, value, sgot->contents + g); 1978 } 1979 } 1980 else if (r_type == R_SCORE_GOT15 || r_type == R_SCORE_CALL15) 1981 { 1982 /* There's no need to create a local GOT entry here; the 1983 calculation for a local GOT15 entry does not involve G. */ 1984 ; 1985 } 1986 else 1987 { 1988 g = score_elf_local_got_index (output_bfd, input_bfd, info, 1989 symbol + addend, r_symndx, h, r_type); 1990 if (g == MINUS_ONE) 1991 return bfd_reloc_outofrange; 1992 } 1993 1994 /* Convert GOT indices to actual offsets. */ 1995 g = score_elf_got_offset_from_index (elf_hash_table (info)->dynobj, 1996 output_bfd, input_bfd, g); 1997 break; 1998 1999 case R_SCORE_HI16: 2000 case R_SCORE_LO16: 2001 case R_SCORE_GPREL32: 2002 gp0 = _bfd_get_gp_value (input_bfd); 2003 gp = _bfd_get_gp_value (output_bfd); 2004 break; 2005 2006 case R_SCORE_GP15: 2007 gp = _bfd_get_gp_value (output_bfd); 2008 2009 default: 2010 break; 2011 } 2012 2013 switch (r_type) 2014 { 2015 case R_SCORE_NONE: 2016 return bfd_reloc_ok; 2017 2018 case R_SCORE_ABS32: 2019 case R_SCORE_REL32: 2020 if ((info->shared 2021 || (elf_hash_table (info)->dynamic_sections_created 2022 && h != NULL 2023 && h->root.def_dynamic 2024 && !h->root.def_regular)) 2025 && r_symndx != STN_UNDEF 2026 && (input_section->flags & SEC_ALLOC) != 0) 2027 { 2028 /* If we're creating a shared library, or this relocation is against a symbol 2029 in a shared library, then we can't know where the symbol will end up. 2030 So, we create a relocation record in the output, and leave the job up 2031 to the dynamic linker. */ 2032 value = addend; 2033 if (!score_elf_create_dynamic_relocation (output_bfd, info, rel, h, 2034 symbol, &value, 2035 input_section)) 2036 return bfd_reloc_undefined; 2037 } 2038 else if (r_symndx == STN_UNDEF) 2039 /* r_symndx will be STN_UNDEF (zero) only for relocs against symbols 2040 from removed linkonce sections, or sections discarded by 2041 a linker script. */ 2042 value = 0; 2043 else 2044 { 2045 if (r_type != R_SCORE_REL32) 2046 value = symbol + addend; 2047 else 2048 value = addend; 2049 } 2050 value &= howto->dst_mask; 2051 bfd_put_32 (input_bfd, value, hit_data); 2052 return bfd_reloc_ok; 2053 2054 case R_SCORE_ABS16: 2055 value += addend; 2056 if ((long) value > 0x7fff || (long) value < -0x8000) 2057 return bfd_reloc_overflow; 2058 bfd_put_16 (input_bfd, value, hit_data); 2059 return bfd_reloc_ok; 2060 2061 case R_SCORE_24: 2062 addend = bfd_get_32 (input_bfd, hit_data); 2063 offset = (((addend & howto->src_mask) >> 1) & 0x1ff8000) | ((addend & howto->src_mask) & 0x7fff); 2064 if ((offset & 0x1000000) != 0) 2065 offset |= 0xfe000000; 2066 value += offset; 2067 abs_value = abs (value - rel_addr); 2068 if ((abs_value & 0xfe000000) != 0) 2069 return bfd_reloc_overflow; 2070 addend = (addend & ~howto->src_mask) 2071 | (((value << 1) & howto->src_mask) & 0x3ff0000) | (value & 0x7fff); 2072 bfd_put_32 (input_bfd, addend, hit_data); 2073 return bfd_reloc_ok; 2074 2075 case R_SCORE_PC19: 2076 addend = bfd_get_32 (input_bfd, hit_data); 2077 offset = (((addend & howto->src_mask) & 0x3ff0000) >> 6) | ((addend & howto->src_mask) & 0x3ff); 2078 if ((offset & 0x80000) != 0) 2079 offset |= 0xfff00000; 2080 abs_value = value = value - rel_addr + offset; 2081 /* exceed 20 bit : overflow. */ 2082 if ((abs_value & 0x80000000) == 0x80000000) 2083 abs_value = 0xffffffff - value + 1; 2084 if ((abs_value & 0xfff80000) != 0) 2085 return bfd_reloc_overflow; 2086 addend = (addend & ~howto->src_mask) 2087 | (((value << 6) & howto->src_mask) & 0x3ff0000) | (value & 0x3ff); 2088 bfd_put_32 (input_bfd, addend, hit_data); 2089 return bfd_reloc_ok; 2090 2091 case R_SCORE16_11: 2092 addend = bfd_get_16 (input_bfd, hit_data); 2093 offset = addend & howto->src_mask; 2094 if ((offset & 0x800) != 0) /* Offset is negative. */ 2095 offset |= 0xfffff000; 2096 value += offset; 2097 abs_value = abs (value - rel_addr); 2098 if ((abs_value & 0xfffff000) != 0) 2099 return bfd_reloc_overflow; 2100 addend = (addend & ~howto->src_mask) | (value & howto->src_mask); 2101 bfd_put_16 (input_bfd, addend, hit_data); 2102 return bfd_reloc_ok; 2103 2104 case R_SCORE16_PC8: 2105 addend = bfd_get_16 (input_bfd, hit_data); 2106 offset = (addend & howto->src_mask) << 1; 2107 if ((offset & 0x100) != 0) /* Offset is negative. */ 2108 offset |= 0xfffffe00; 2109 abs_value = value = value - rel_addr + offset; 2110 /* Sign bit + exceed 9 bit. */ 2111 if (((value & 0xffffff00) != 0) && ((value & 0xffffff00) != 0xffffff00)) 2112 return bfd_reloc_overflow; 2113 value >>= 1; 2114 addend = (addend & ~howto->src_mask) | (value & howto->src_mask); 2115 bfd_put_16 (input_bfd, addend, hit_data); 2116 return bfd_reloc_ok; 2117 2118 case R_SCORE_HI16: 2119 return bfd_reloc_ok; 2120 2121 case R_SCORE_LO16: 2122 hi16_addend = bfd_get_32 (input_bfd, hit_data - 4); 2123 hi16_offset = ((((hi16_addend >> 16) & 0x3) << 15) | (hi16_addend & 0x7fff)) >> 1; 2124 addend = bfd_get_32 (input_bfd, hit_data); 2125 offset = ((((addend >> 16) & 0x3) << 15) | (addend & 0x7fff)) >> 1; 2126 offset = (hi16_offset << 16) | (offset & 0xffff); 2127 2128 if (!gp_disp_p) 2129 uvalue = value + offset; 2130 else 2131 uvalue = offset + gp - rel_addr + 4; 2132 2133 hi16_offset = (uvalue >> 16) << 1; 2134 hi16_value = (hi16_addend & (~(howto->dst_mask))) 2135 | (hi16_offset & 0x7fff) | ((hi16_offset << 1) & 0x30000); 2136 bfd_put_32 (input_bfd, hi16_value, hit_data - 4); 2137 offset = (uvalue & 0xffff) << 1; 2138 value = (addend & (~(howto->dst_mask))) | (offset & 0x7fff) | ((offset << 1) & 0x30000); 2139 bfd_put_32 (input_bfd, value, hit_data); 2140 return bfd_reloc_ok; 2141 2142 case R_SCORE_GP15: 2143 addend = bfd_get_32 (input_bfd, hit_data); 2144 offset = addend & 0x7fff; 2145 if ((offset & 0x4000) == 0x4000) 2146 offset |= 0xffffc000; 2147 value = value + offset - gp; 2148 if (((value & 0xffffc000) != 0) && ((value & 0xffffc000) != 0xffffc000)) 2149 return bfd_reloc_overflow; 2150 value = (addend & ~howto->src_mask) | (value & howto->src_mask); 2151 bfd_put_32 (input_bfd, value, hit_data); 2152 return bfd_reloc_ok; 2153 2154 case R_SCORE_GOT15: 2155 case R_SCORE_CALL15: 2156 if (local_p) 2157 { 2158 bfd_boolean forced; 2159 2160 /* The special case is when the symbol is forced to be local. We need the 2161 full address in the GOT since no R_SCORE_GOT_LO16 relocation follows. */ 2162 forced = ! score_elf_local_relocation_p (input_bfd, rel, 2163 local_sections, FALSE); 2164 value = score_elf_got16_entry (output_bfd, input_bfd, info, 2165 symbol + addend, forced); 2166 if (value == MINUS_ONE) 2167 return bfd_reloc_outofrange; 2168 value = score_elf_got_offset_from_index (elf_hash_table (info)->dynobj, 2169 output_bfd, input_bfd, value); 2170 } 2171 else 2172 { 2173 value = g; 2174 } 2175 2176 if ((long) value > 0x3fff || (long) value < -0x4000) 2177 return bfd_reloc_overflow; 2178 2179 addend = bfd_get_32 (input_bfd, hit_data); 2180 value = (addend & ~howto->dst_mask) | (value & howto->dst_mask); 2181 bfd_put_32 (input_bfd, value, hit_data); 2182 return bfd_reloc_ok; 2183 2184 case R_SCORE_GPREL32: 2185 value = (addend + symbol + gp0 - gp); 2186 value &= howto->dst_mask; 2187 bfd_put_32 (input_bfd, value, hit_data); 2188 return bfd_reloc_ok; 2189 2190 case R_SCORE_GOT_LO16: 2191 addend = bfd_get_32 (input_bfd, hit_data); 2192 value = (((addend >> 16) & 0x3) << 14) | ((addend & 0x7fff) >> 1); 2193 value += symbol; 2194 value = (addend & (~(howto->dst_mask))) | ((value & 0x3fff) << 1) 2195 | (((value >> 14) & 0x3) << 16); 2196 2197 bfd_put_32 (input_bfd, value, hit_data); 2198 return bfd_reloc_ok; 2199 2200 case R_SCORE_DUMMY_HI16: 2201 return bfd_reloc_ok; 2202 2203 case R_SCORE_GNU_VTINHERIT: 2204 case R_SCORE_GNU_VTENTRY: 2205 /* We don't do anything with these at present. */ 2206 return bfd_reloc_continue; 2207 2208 default: 2209 return bfd_reloc_notsupported; 2210 } 2211 } 2212 2213 /* Score backend functions. */ 2214 2215 void 2216 s7_bfd_score_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, 2217 arelent *bfd_reloc, 2218 Elf_Internal_Rela *elf_reloc) 2219 { 2220 unsigned int r_type; 2221 2222 r_type = ELF32_R_TYPE (elf_reloc->r_info); 2223 if (r_type >= ARRAY_SIZE (elf32_score_howto_table)) 2224 bfd_reloc->howto = NULL; 2225 else 2226 bfd_reloc->howto = &elf32_score_howto_table[r_type]; 2227 } 2228 2229 /* Relocate an score ELF section. */ 2230 2231 bfd_boolean 2232 s7_bfd_score_elf_relocate_section (bfd *output_bfd, 2233 struct bfd_link_info *info, 2234 bfd *input_bfd, 2235 asection *input_section, 2236 bfd_byte *contents, 2237 Elf_Internal_Rela *relocs, 2238 Elf_Internal_Sym *local_syms, 2239 asection **local_sections) 2240 { 2241 Elf_Internal_Shdr *symtab_hdr; 2242 Elf_Internal_Rela *rel; 2243 Elf_Internal_Rela *relend; 2244 const char *name; 2245 unsigned long offset; 2246 unsigned long hi16_addend, hi16_offset, hi16_value, uvalue; 2247 size_t extsymoff; 2248 bfd_boolean gp_disp_p = FALSE; 2249 2250 /* Sort dynsym. */ 2251 if (elf_hash_table (info)->dynamic_sections_created) 2252 { 2253 bfd_size_type dynsecsymcount = 0; 2254 if (info->shared) 2255 { 2256 asection * p; 2257 const struct elf_backend_data *bed = get_elf_backend_data (output_bfd); 2258 2259 for (p = output_bfd->sections; p ; p = p->next) 2260 if ((p->flags & SEC_EXCLUDE) == 0 2261 && (p->flags & SEC_ALLOC) != 0 2262 && !(*bed->elf_backend_omit_section_dynsym) (output_bfd, info, p)) 2263 ++ dynsecsymcount; 2264 } 2265 2266 if (!score_elf_sort_hash_table (info, dynsecsymcount + 1)) 2267 return FALSE; 2268 } 2269 2270 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; 2271 extsymoff = (elf_bad_symtab (input_bfd)) ? 0 : symtab_hdr->sh_info; 2272 rel = relocs; 2273 relend = relocs + input_section->reloc_count; 2274 for (; rel < relend; rel++) 2275 { 2276 int r_type; 2277 reloc_howto_type *howto; 2278 unsigned long r_symndx; 2279 Elf_Internal_Sym *sym; 2280 asection *sec; 2281 struct score_elf_link_hash_entry *h; 2282 bfd_vma relocation = 0; 2283 bfd_reloc_status_type r; 2284 arelent bfd_reloc; 2285 2286 r_symndx = ELF32_R_SYM (rel->r_info); 2287 r_type = ELF32_R_TYPE (rel->r_info); 2288 2289 s7_bfd_score_info_to_howto (input_bfd, &bfd_reloc, (Elf_Internal_Rela *) rel); 2290 howto = bfd_reloc.howto; 2291 2292 h = NULL; 2293 sym = NULL; 2294 sec = NULL; 2295 2296 if (r_symndx < extsymoff) 2297 { 2298 sym = local_syms + r_symndx; 2299 sec = local_sections[r_symndx]; 2300 relocation = sec->output_section->vma + sec->output_offset; 2301 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec); 2302 2303 if (!info->relocatable) 2304 { 2305 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION 2306 || (sec->flags & SEC_MERGE)) 2307 { 2308 relocation += sym->st_value; 2309 } 2310 2311 if ((sec->flags & SEC_MERGE) 2312 && ELF_ST_TYPE (sym->st_info) == STT_SECTION) 2313 { 2314 asection *msec; 2315 bfd_vma addend, value; 2316 2317 switch (r_type) 2318 { 2319 case R_SCORE_HI16: 2320 break; 2321 case R_SCORE_LO16: 2322 hi16_addend = bfd_get_32 (input_bfd, contents + rel->r_offset - 4); 2323 hi16_offset = ((((hi16_addend >> 16) & 0x3) << 15) | (hi16_addend & 0x7fff)) >> 1; 2324 value = bfd_get_32 (input_bfd, contents + rel->r_offset); 2325 offset = ((((value >> 16) & 0x3) << 15) | (value & 0x7fff)) >> 1; 2326 addend = (hi16_offset << 16) | (offset & 0xffff); 2327 msec = sec; 2328 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend); 2329 addend -= relocation; 2330 addend += msec->output_section->vma + msec->output_offset; 2331 uvalue = addend; 2332 hi16_offset = (uvalue >> 16) << 1; 2333 hi16_value = (hi16_addend & (~(howto->dst_mask))) 2334 | (hi16_offset & 0x7fff) | ((hi16_offset << 1) & 0x30000); 2335 bfd_put_32 (input_bfd, hi16_value, contents + rel->r_offset - 4); 2336 offset = (uvalue & 0xffff) << 1; 2337 value = (value & (~(howto->dst_mask))) 2338 | (offset & 0x7fff) | ((offset << 1) & 0x30000); 2339 bfd_put_32 (input_bfd, value, contents + rel->r_offset); 2340 break; 2341 case R_SCORE_GOT_LO16: 2342 value = bfd_get_32 (input_bfd, contents + rel->r_offset); 2343 addend = (((value >> 16) & 0x3) << 14) | ((value & 0x7fff) >> 1); 2344 msec = sec; 2345 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend) - relocation; 2346 addend += msec->output_section->vma + msec->output_offset; 2347 value = (value & (~(howto->dst_mask))) | ((addend & 0x3fff) << 1) 2348 | (((addend >> 14) & 0x3) << 16); 2349 2350 bfd_put_32 (input_bfd, value, contents + rel->r_offset); 2351 break; 2352 default: 2353 value = bfd_get_32 (input_bfd, contents + rel->r_offset); 2354 /* Get the (signed) value from the instruction. */ 2355 addend = value & howto->src_mask; 2356 if (addend & ((howto->src_mask + 1) >> 1)) 2357 { 2358 bfd_signed_vma mask; 2359 2360 mask = -1; 2361 mask &= ~howto->src_mask; 2362 addend |= mask; 2363 } 2364 msec = sec; 2365 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend) - relocation; 2366 addend += msec->output_section->vma + msec->output_offset; 2367 value = (value & ~howto->dst_mask) | (addend & howto->dst_mask); 2368 bfd_put_32 (input_bfd, value, contents + rel->r_offset); 2369 break; 2370 } 2371 } 2372 } 2373 } 2374 else 2375 { 2376 /* For global symbols we look up the symbol in the hash-table. */ 2377 h = ((struct score_elf_link_hash_entry *) 2378 elf_sym_hashes (input_bfd) [r_symndx - extsymoff]); 2379 /* Find the real hash-table entry for this symbol. */ 2380 while (h->root.root.type == bfd_link_hash_indirect 2381 || h->root.root.type == bfd_link_hash_warning) 2382 h = (struct score_elf_link_hash_entry *) h->root.root.u.i.link; 2383 2384 /* Record the name of this symbol, for our caller. */ 2385 name = h->root.root.root.string; 2386 2387 /* See if this is the special GP_DISP_LABEL symbol. Note that such a 2388 symbol must always be a global symbol. */ 2389 if (strcmp (name, GP_DISP_LABEL) == 0) 2390 { 2391 /* Relocations against GP_DISP_LABEL are permitted only with 2392 R_SCORE_HI16 and R_SCORE_LO16 relocations. */ 2393 if (r_type != R_SCORE_HI16 && r_type != R_SCORE_LO16) 2394 return bfd_reloc_notsupported; 2395 2396 gp_disp_p = TRUE; 2397 } 2398 2399 /* If this symbol is defined, calculate its address. Note that 2400 GP_DISP_LABEL is a magic symbol, always implicitly defined by the 2401 linker, so it's inappropriate to check to see whether or not 2402 its defined. */ 2403 else if ((h->root.root.type == bfd_link_hash_defined 2404 || h->root.root.type == bfd_link_hash_defweak) 2405 && h->root.root.u.def.section) 2406 { 2407 sec = h->root.root.u.def.section; 2408 if (sec->output_section) 2409 relocation = (h->root.root.u.def.value 2410 + sec->output_section->vma 2411 + sec->output_offset); 2412 else 2413 { 2414 relocation = h->root.root.u.def.value; 2415 } 2416 } 2417 else if (h->root.root.type == bfd_link_hash_undefweak) 2418 /* We allow relocations against undefined weak symbols, giving 2419 it the value zero, so that you can undefined weak functions 2420 and check to see if they exist by looking at their addresses. */ 2421 relocation = 0; 2422 else if (info->unresolved_syms_in_objects == RM_IGNORE 2423 && ELF_ST_VISIBILITY (h->root.other) == STV_DEFAULT) 2424 relocation = 0; 2425 else if (strcmp (name, "_DYNAMIC_LINK") == 0) 2426 { 2427 /* If this is a dynamic link, we should have created a _DYNAMIC_LINK symbol 2428 in s7_bfd_score_elf_create_dynamic_sections. Otherwise, we should define 2429 the symbol with a value of 0. */ 2430 BFD_ASSERT (! info->shared); 2431 BFD_ASSERT (bfd_get_section_by_name (output_bfd, ".dynamic") == NULL); 2432 relocation = 0; 2433 } 2434 else if (!info->relocatable) 2435 { 2436 if (! ((*info->callbacks->undefined_symbol) 2437 (info, h->root.root.root.string, input_bfd, 2438 input_section, rel->r_offset, 2439 (info->unresolved_syms_in_objects == RM_GENERATE_ERROR) 2440 || ELF_ST_VISIBILITY (h->root.other)))) 2441 return bfd_reloc_undefined; 2442 relocation = 0; 2443 } 2444 } 2445 2446 if (sec != NULL && discarded_section (sec)) 2447 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, 2448 rel, 1, relend, howto, 0, contents); 2449 2450 if (info->relocatable) 2451 { 2452 /* This is a relocatable link. We don't have to change 2453 anything, unless the reloc is against a section symbol, 2454 in which case we have to adjust according to where the 2455 section symbol winds up in the output section. */ 2456 if (r_symndx < symtab_hdr->sh_info) 2457 { 2458 sym = local_syms + r_symndx; 2459 2460 if (r_type == R_SCORE_GOT15) 2461 { 2462 const Elf_Internal_Rela *lo16_rel; 2463 const struct elf_backend_data *bed; 2464 bfd_vma lo_addend = 0, lo_value = 0; 2465 bfd_vma addend, value; 2466 2467 value = bfd_get_32 (input_bfd, contents + rel->r_offset); 2468 addend = value & 0x7fff; 2469 if ((addend & 0x4000) == 0x4000) 2470 addend |= 0xffffc000; 2471 2472 bed = get_elf_backend_data (output_bfd); 2473 relend = relocs + input_section->reloc_count * bed->s->int_rels_per_ext_rel; 2474 lo16_rel = score_elf_next_relocation (input_bfd, R_SCORE_GOT_LO16, rel, relend); 2475 if (lo16_rel != NULL) 2476 { 2477 lo_value = bfd_get_32 (input_bfd, contents + lo16_rel->r_offset); 2478 lo_addend = (((lo_value >> 16) & 0x3) << 14) | ((lo_value & 0x7fff) >> 1); 2479 } 2480 2481 addend <<= 16; 2482 addend += lo_addend; 2483 2484 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) 2485 addend += local_sections[r_symndx]->output_offset; 2486 2487 lo_addend = addend & 0xffff; 2488 lo_value = (lo_value & (~(howto->dst_mask))) | ((lo_addend & 0x3fff) << 1) 2489 | (((lo_addend >> 14) & 0x3) << 16); 2490 bfd_put_32 (input_bfd, lo_value, contents + lo16_rel->r_offset); 2491 2492 addend = addend >> 16; 2493 value = (value & ~howto->src_mask) | (addend & howto->src_mask); 2494 bfd_put_32 (input_bfd, value, contents + rel->r_offset); 2495 } 2496 else if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) 2497 { 2498 sec = local_sections[r_symndx]; 2499 score_elf_add_to_rel (input_bfd, contents + rel->r_offset, 2500 howto, (bfd_signed_vma) (sec->output_offset + sym->st_value)); 2501 } 2502 } 2503 continue; 2504 } 2505 2506 /* This is a final link. */ 2507 r = score_elf_final_link_relocate (howto, input_bfd, output_bfd, 2508 input_section, contents, rel, relocs, 2509 relocation, info, name, 2510 (h ? ELF_ST_TYPE ((unsigned int) h->root.root.type) : 2511 ELF_ST_TYPE ((unsigned int) sym->st_info)), h, local_syms, 2512 local_sections, gp_disp_p); 2513 2514 if (r != bfd_reloc_ok) 2515 { 2516 const char *msg = (const char *)0; 2517 2518 switch (r) 2519 { 2520 case bfd_reloc_overflow: 2521 /* If the overflowing reloc was to an undefined symbol, 2522 we have already printed one error message and there 2523 is no point complaining again. */ 2524 if (((!h) || (h->root.root.type != bfd_link_hash_undefined)) 2525 && (!((*info->callbacks->reloc_overflow) 2526 (info, NULL, name, howto->name, (bfd_vma) 0, 2527 input_bfd, input_section, rel->r_offset)))) 2528 return FALSE; 2529 break; 2530 case bfd_reloc_undefined: 2531 if (!((*info->callbacks->undefined_symbol) 2532 (info, name, input_bfd, input_section, rel->r_offset, TRUE))) 2533 return FALSE; 2534 break; 2535 2536 case bfd_reloc_outofrange: 2537 msg = _("internal error: out of range error"); 2538 goto common_error; 2539 2540 case bfd_reloc_notsupported: 2541 msg = _("internal error: unsupported relocation error"); 2542 goto common_error; 2543 2544 case bfd_reloc_dangerous: 2545 msg = _("internal error: dangerous error"); 2546 goto common_error; 2547 2548 default: 2549 msg = _("internal error: unknown error"); 2550 /* fall through */ 2551 2552 common_error: 2553 if (!((*info->callbacks->warning) 2554 (info, msg, name, input_bfd, input_section, rel->r_offset))) 2555 return FALSE; 2556 break; 2557 } 2558 } 2559 } 2560 2561 return TRUE; 2562 } 2563 2564 /* Look through the relocs for a section during the first phase, and 2565 allocate space in the global offset table. */ 2566 2567 bfd_boolean 2568 s7_bfd_score_elf_check_relocs (bfd *abfd, 2569 struct bfd_link_info *info, 2570 asection *sec, 2571 const Elf_Internal_Rela *relocs) 2572 { 2573 const char *name; 2574 bfd *dynobj; 2575 Elf_Internal_Shdr *symtab_hdr; 2576 struct elf_link_hash_entry **sym_hashes; 2577 struct score_got_info *g; 2578 size_t extsymoff; 2579 const Elf_Internal_Rela *rel; 2580 const Elf_Internal_Rela *rel_end; 2581 asection *sgot; 2582 asection *sreloc; 2583 const struct elf_backend_data *bed; 2584 2585 if (info->relocatable) 2586 return TRUE; 2587 2588 dynobj = elf_hash_table (info)->dynobj; 2589 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 2590 sym_hashes = elf_sym_hashes (abfd); 2591 extsymoff = (elf_bad_symtab (abfd)) ? 0 : symtab_hdr->sh_info; 2592 2593 name = bfd_get_section_name (abfd, sec); 2594 2595 if (dynobj == NULL) 2596 { 2597 sgot = NULL; 2598 g = NULL; 2599 } 2600 else 2601 { 2602 sgot = score_elf_got_section (dynobj, FALSE); 2603 if (sgot == NULL) 2604 g = NULL; 2605 else 2606 { 2607 BFD_ASSERT (score_elf_section_data (sgot) != NULL); 2608 g = score_elf_section_data (sgot)->u.got_info; 2609 BFD_ASSERT (g != NULL); 2610 } 2611 } 2612 2613 sreloc = NULL; 2614 bed = get_elf_backend_data (abfd); 2615 rel_end = relocs + sec->reloc_count * bed->s->int_rels_per_ext_rel; 2616 for (rel = relocs; rel < rel_end; ++rel) 2617 { 2618 unsigned long r_symndx; 2619 unsigned int r_type; 2620 struct elf_link_hash_entry *h; 2621 2622 r_symndx = ELF32_R_SYM (rel->r_info); 2623 r_type = ELF32_R_TYPE (rel->r_info); 2624 2625 if (r_symndx < extsymoff) 2626 { 2627 h = NULL; 2628 } 2629 else if (r_symndx >= extsymoff + NUM_SHDR_ENTRIES (symtab_hdr)) 2630 { 2631 (*_bfd_error_handler) (_("%s: Malformed reloc detected for section %s"), abfd, name); 2632 bfd_set_error (bfd_error_bad_value); 2633 return FALSE; 2634 } 2635 else 2636 { 2637 h = sym_hashes[r_symndx - extsymoff]; 2638 2639 /* This may be an indirect symbol created because of a version. */ 2640 if (h != NULL) 2641 { 2642 while (h->root.type == bfd_link_hash_indirect) 2643 h = (struct elf_link_hash_entry *) h->root.u.i.link; 2644 } 2645 } 2646 2647 /* Some relocs require a global offset table. */ 2648 if (dynobj == NULL || sgot == NULL) 2649 { 2650 switch (r_type) 2651 { 2652 case R_SCORE_GOT15: 2653 case R_SCORE_CALL15: 2654 if (dynobj == NULL) 2655 elf_hash_table (info)->dynobj = dynobj = abfd; 2656 if (!score_elf_create_got_section (dynobj, info, FALSE)) 2657 return FALSE; 2658 g = score_elf_got_info (dynobj, &sgot); 2659 break; 2660 case R_SCORE_ABS32: 2661 case R_SCORE_REL32: 2662 if (dynobj == NULL && (info->shared || h != NULL) && (sec->flags & SEC_ALLOC) != 0) 2663 elf_hash_table (info)->dynobj = dynobj = abfd; 2664 break; 2665 default: 2666 break; 2667 } 2668 } 2669 2670 if (!h && (r_type == R_SCORE_GOT_LO16)) 2671 { 2672 if (! score_elf_record_local_got_symbol (abfd, r_symndx, rel->r_addend, g)) 2673 return FALSE; 2674 } 2675 2676 switch (r_type) 2677 { 2678 case R_SCORE_CALL15: 2679 if (h == NULL) 2680 { 2681 (*_bfd_error_handler) 2682 (_("%B: CALL15 reloc at 0x%lx not against global symbol"), 2683 abfd, (unsigned long) rel->r_offset); 2684 bfd_set_error (bfd_error_bad_value); 2685 return FALSE; 2686 } 2687 else 2688 { 2689 /* This symbol requires a global offset table entry. */ 2690 if (! score_elf_record_global_got_symbol (h, abfd, info, g)) 2691 return FALSE; 2692 2693 /* We need a stub, not a plt entry for the undefined function. But we record 2694 it as if it needs plt. See _bfd_elf_adjust_dynamic_symbol. */ 2695 h->needs_plt = 1; 2696 h->type = STT_FUNC; 2697 } 2698 break; 2699 case R_SCORE_GOT15: 2700 if (h && ! score_elf_record_global_got_symbol (h, abfd, info, g)) 2701 return FALSE; 2702 break; 2703 case R_SCORE_ABS32: 2704 case R_SCORE_REL32: 2705 if ((info->shared || h != NULL) && (sec->flags & SEC_ALLOC) != 0) 2706 { 2707 if (sreloc == NULL) 2708 { 2709 sreloc = score_elf_rel_dyn_section (dynobj, TRUE); 2710 if (sreloc == NULL) 2711 return FALSE; 2712 } 2713 #define SCORE_READONLY_SECTION (SEC_ALLOC | SEC_LOAD | SEC_READONLY) 2714 if (info->shared) 2715 { 2716 /* When creating a shared object, we must copy these reloc types into 2717 the output file as R_SCORE_REL32 relocs. We make room for this reloc 2718 in the .rel.dyn reloc section. */ 2719 score_elf_allocate_dynamic_relocations (dynobj, 1); 2720 if ((sec->flags & SCORE_READONLY_SECTION) 2721 == SCORE_READONLY_SECTION) 2722 /* We tell the dynamic linker that there are 2723 relocations against the text segment. */ 2724 info->flags |= DF_TEXTREL; 2725 } 2726 else 2727 { 2728 struct score_elf_link_hash_entry *hscore; 2729 2730 /* We only need to copy this reloc if the symbol is 2731 defined in a dynamic object. */ 2732 hscore = (struct score_elf_link_hash_entry *) h; 2733 ++hscore->possibly_dynamic_relocs; 2734 if ((sec->flags & SCORE_READONLY_SECTION) 2735 == SCORE_READONLY_SECTION) 2736 /* We need it to tell the dynamic linker if there 2737 are relocations against the text segment. */ 2738 hscore->readonly_reloc = TRUE; 2739 } 2740 2741 /* Even though we don't directly need a GOT entry for this symbol, 2742 a symbol must have a dynamic symbol table index greater that 2743 DT_SCORE_GOTSYM if there are dynamic relocations against it. */ 2744 if (h != NULL) 2745 { 2746 if (dynobj == NULL) 2747 elf_hash_table (info)->dynobj = dynobj = abfd; 2748 if (! score_elf_create_got_section (dynobj, info, TRUE)) 2749 return FALSE; 2750 g = score_elf_got_info (dynobj, &sgot); 2751 if (! score_elf_record_global_got_symbol (h, abfd, info, g)) 2752 return FALSE; 2753 } 2754 } 2755 break; 2756 2757 /* This relocation describes the C++ object vtable hierarchy. 2758 Reconstruct it for later use during GC. */ 2759 case R_SCORE_GNU_VTINHERIT: 2760 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 2761 return FALSE; 2762 break; 2763 2764 /* This relocation describes which C++ vtable entries are actually 2765 used. Record for later use during GC. */ 2766 case R_SCORE_GNU_VTENTRY: 2767 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset)) 2768 return FALSE; 2769 break; 2770 default: 2771 break; 2772 } 2773 2774 /* We must not create a stub for a symbol that has relocations 2775 related to taking the function's address. */ 2776 switch (r_type) 2777 { 2778 default: 2779 if (h != NULL) 2780 { 2781 struct score_elf_link_hash_entry *sh; 2782 2783 sh = (struct score_elf_link_hash_entry *) h; 2784 sh->no_fn_stub = TRUE; 2785 } 2786 break; 2787 case R_SCORE_CALL15: 2788 break; 2789 } 2790 } 2791 2792 return TRUE; 2793 } 2794 2795 bfd_boolean 2796 s7_bfd_score_elf_add_symbol_hook (bfd *abfd, 2797 struct bfd_link_info *info ATTRIBUTE_UNUSED, 2798 Elf_Internal_Sym *sym, 2799 const char **namep ATTRIBUTE_UNUSED, 2800 flagword *flagsp ATTRIBUTE_UNUSED, 2801 asection **secp, 2802 bfd_vma *valp) 2803 { 2804 switch (sym->st_shndx) 2805 { 2806 case SHN_COMMON: 2807 if (sym->st_size > elf_gp_size (abfd)) 2808 break; 2809 /* Fall through. */ 2810 case SHN_SCORE_SCOMMON: 2811 *secp = bfd_make_section_old_way (abfd, ".scommon"); 2812 (*secp)->flags |= SEC_IS_COMMON; 2813 *valp = sym->st_size; 2814 break; 2815 } 2816 2817 return TRUE; 2818 } 2819 2820 void 2821 s7_bfd_score_elf_symbol_processing (bfd *abfd, asymbol *asym) 2822 { 2823 elf_symbol_type *elfsym; 2824 2825 elfsym = (elf_symbol_type *) asym; 2826 switch (elfsym->internal_elf_sym.st_shndx) 2827 { 2828 case SHN_COMMON: 2829 if (asym->value > elf_gp_size (abfd)) 2830 break; 2831 /* Fall through. */ 2832 case SHN_SCORE_SCOMMON: 2833 if (score_elf_scom_section.name == NULL) 2834 { 2835 /* Initialize the small common section. */ 2836 score_elf_scom_section.name = ".scommon"; 2837 score_elf_scom_section.flags = SEC_IS_COMMON; 2838 score_elf_scom_section.output_section = &score_elf_scom_section; 2839 score_elf_scom_section.symbol = &score_elf_scom_symbol; 2840 score_elf_scom_section.symbol_ptr_ptr = &score_elf_scom_symbol_ptr; 2841 score_elf_scom_symbol.name = ".scommon"; 2842 score_elf_scom_symbol.flags = BSF_SECTION_SYM; 2843 score_elf_scom_symbol.section = &score_elf_scom_section; 2844 score_elf_scom_symbol_ptr = &score_elf_scom_symbol; 2845 } 2846 asym->section = &score_elf_scom_section; 2847 asym->value = elfsym->internal_elf_sym.st_size; 2848 break; 2849 } 2850 } 2851 2852 int 2853 s7_bfd_score_elf_link_output_symbol_hook (struct bfd_link_info *info ATTRIBUTE_UNUSED, 2854 const char *name ATTRIBUTE_UNUSED, 2855 Elf_Internal_Sym *sym, 2856 asection *input_sec, 2857 struct elf_link_hash_entry *h ATTRIBUTE_UNUSED) 2858 { 2859 /* If we see a common symbol, which implies a relocatable link, then 2860 if a symbol was small common in an input file, mark it as small 2861 common in the output file. */ 2862 if (sym->st_shndx == SHN_COMMON && strcmp (input_sec->name, ".scommon") == 0) 2863 sym->st_shndx = SHN_SCORE_SCOMMON; 2864 2865 return 1; 2866 } 2867 2868 bfd_boolean 2869 s7_bfd_score_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED, 2870 asection *sec, 2871 int *retval) 2872 { 2873 if (strcmp (bfd_get_section_name (abfd, sec), ".scommon") == 0) 2874 { 2875 *retval = SHN_SCORE_SCOMMON; 2876 return TRUE; 2877 } 2878 2879 return FALSE; 2880 } 2881 2882 /* Adjust a symbol defined by a dynamic object and referenced by a 2883 regular object. The current definition is in some section of the 2884 dynamic object, but we're not including those sections. We have to 2885 change the definition to something the rest of the link can understand. */ 2886 2887 bfd_boolean 2888 s7_bfd_score_elf_adjust_dynamic_symbol (struct bfd_link_info *info, 2889 struct elf_link_hash_entry *h) 2890 { 2891 bfd *dynobj; 2892 struct score_elf_link_hash_entry *hscore; 2893 asection *s; 2894 2895 dynobj = elf_hash_table (info)->dynobj; 2896 2897 /* Make sure we know what is going on here. */ 2898 BFD_ASSERT (dynobj != NULL 2899 && (h->needs_plt 2900 || h->u.weakdef != NULL 2901 || (h->def_dynamic && h->ref_regular && !h->def_regular))); 2902 2903 /* If this symbol is defined in a dynamic object, we need to copy 2904 any R_SCORE_ABS32 or R_SCORE_REL32 relocs against it into the output 2905 file. */ 2906 hscore = (struct score_elf_link_hash_entry *) h; 2907 if (!info->relocatable 2908 && hscore->possibly_dynamic_relocs != 0 2909 && (h->root.type == bfd_link_hash_defweak || !h->def_regular)) 2910 { 2911 score_elf_allocate_dynamic_relocations (dynobj, hscore->possibly_dynamic_relocs); 2912 if (hscore->readonly_reloc) 2913 /* We tell the dynamic linker that there are relocations 2914 against the text segment. */ 2915 info->flags |= DF_TEXTREL; 2916 } 2917 2918 /* For a function, create a stub, if allowed. */ 2919 if (!hscore->no_fn_stub && h->needs_plt) 2920 { 2921 if (!elf_hash_table (info)->dynamic_sections_created) 2922 return TRUE; 2923 2924 /* If this symbol is not defined in a regular file, then set 2925 the symbol to the stub location. This is required to make 2926 function pointers compare as equal between the normal 2927 executable and the shared library. */ 2928 if (!h->def_regular) 2929 { 2930 /* We need .stub section. */ 2931 s = bfd_get_linker_section (dynobj, SCORE_ELF_STUB_SECTION_NAME); 2932 BFD_ASSERT (s != NULL); 2933 2934 h->root.u.def.section = s; 2935 h->root.u.def.value = s->size; 2936 2937 /* XXX Write this stub address somewhere. */ 2938 h->plt.offset = s->size; 2939 2940 /* Make room for this stub code. */ 2941 s->size += SCORE_FUNCTION_STUB_SIZE; 2942 2943 /* The last half word of the stub will be filled with the index 2944 of this symbol in .dynsym section. */ 2945 return TRUE; 2946 } 2947 } 2948 else if ((h->type == STT_FUNC) && !h->needs_plt) 2949 { 2950 /* This will set the entry for this symbol in the GOT to 0, and 2951 the dynamic linker will take care of this. */ 2952 h->root.u.def.value = 0; 2953 return TRUE; 2954 } 2955 2956 /* If this is a weak symbol, and there is a real definition, the 2957 processor independent code will have arranged for us to see the 2958 real definition first, and we can just use the same value. */ 2959 if (h->u.weakdef != NULL) 2960 { 2961 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined 2962 || h->u.weakdef->root.type == bfd_link_hash_defweak); 2963 h->root.u.def.section = h->u.weakdef->root.u.def.section; 2964 h->root.u.def.value = h->u.weakdef->root.u.def.value; 2965 return TRUE; 2966 } 2967 2968 /* This is a reference to a symbol defined by a dynamic object which 2969 is not a function. */ 2970 return TRUE; 2971 } 2972 2973 /* This function is called after all the input files have been read, 2974 and the input sections have been assigned to output sections. */ 2975 2976 bfd_boolean 2977 s7_bfd_score_elf_always_size_sections (bfd *output_bfd, 2978 struct bfd_link_info *info) 2979 { 2980 bfd *dynobj; 2981 asection *s; 2982 struct score_got_info *g; 2983 int i; 2984 bfd_size_type loadable_size = 0; 2985 bfd_size_type local_gotno; 2986 bfd *sub; 2987 2988 dynobj = elf_hash_table (info)->dynobj; 2989 if (dynobj == NULL) 2990 /* Relocatable links don't have it. */ 2991 return TRUE; 2992 2993 g = score_elf_got_info (dynobj, &s); 2994 if (s == NULL) 2995 return TRUE; 2996 2997 /* Calculate the total loadable size of the output. That will give us the 2998 maximum number of GOT_PAGE entries required. */ 2999 for (sub = info->input_bfds; sub; sub = sub->link_next) 3000 { 3001 asection *subsection; 3002 3003 for (subsection = sub->sections; 3004 subsection; 3005 subsection = subsection->next) 3006 { 3007 if ((subsection->flags & SEC_ALLOC) == 0) 3008 continue; 3009 loadable_size += ((subsection->size + 0xf) 3010 &~ (bfd_size_type) 0xf); 3011 } 3012 } 3013 3014 /* There has to be a global GOT entry for every symbol with 3015 a dynamic symbol table index of DT_SCORE_GOTSYM or 3016 higher. Therefore, it make sense to put those symbols 3017 that need GOT entries at the end of the symbol table. We 3018 do that here. */ 3019 if (! score_elf_sort_hash_table (info, 1)) 3020 return FALSE; 3021 3022 if (g->global_gotsym != NULL) 3023 i = elf_hash_table (info)->dynsymcount - g->global_gotsym->dynindx; 3024 else 3025 /* If there are no global symbols, or none requiring 3026 relocations, then GLOBAL_GOTSYM will be NULL. */ 3027 i = 0; 3028 3029 /* In the worst case, we'll get one stub per dynamic symbol. */ 3030 loadable_size += SCORE_FUNCTION_STUB_SIZE * i; 3031 3032 /* Assume there are two loadable segments consisting of 3033 contiguous sections. Is 5 enough? */ 3034 local_gotno = (loadable_size >> 16) + 5; 3035 3036 g->local_gotno += local_gotno; 3037 s->size += g->local_gotno * SCORE_ELF_GOT_SIZE (output_bfd); 3038 3039 g->global_gotno = i; 3040 s->size += i * SCORE_ELF_GOT_SIZE (output_bfd); 3041 3042 score_elf_resolve_final_got_entries (g); 3043 3044 if (s->size > SCORE_ELF_GOT_MAX_SIZE (output_bfd)) 3045 { 3046 /* Fixme. Error message or Warning message should be issued here. */ 3047 } 3048 3049 return TRUE; 3050 } 3051 3052 /* Set the sizes of the dynamic sections. */ 3053 3054 bfd_boolean 3055 s7_bfd_score_elf_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info) 3056 { 3057 bfd *dynobj; 3058 asection *s; 3059 bfd_boolean reltext; 3060 3061 dynobj = elf_hash_table (info)->dynobj; 3062 BFD_ASSERT (dynobj != NULL); 3063 3064 if (elf_hash_table (info)->dynamic_sections_created) 3065 { 3066 /* Set the contents of the .interp section to the interpreter. */ 3067 if (!info->shared) 3068 { 3069 s = bfd_get_linker_section (dynobj, ".interp"); 3070 BFD_ASSERT (s != NULL); 3071 s->size = strlen (ELF_DYNAMIC_INTERPRETER) + 1; 3072 s->contents = (bfd_byte *) ELF_DYNAMIC_INTERPRETER; 3073 } 3074 } 3075 3076 /* The check_relocs and adjust_dynamic_symbol entry points have 3077 determined the sizes of the various dynamic sections. Allocate 3078 memory for them. */ 3079 reltext = FALSE; 3080 for (s = dynobj->sections; s != NULL; s = s->next) 3081 { 3082 const char *name; 3083 3084 if ((s->flags & SEC_LINKER_CREATED) == 0) 3085 continue; 3086 3087 /* It's OK to base decisions on the section name, because none 3088 of the dynobj section names depend upon the input files. */ 3089 name = bfd_get_section_name (dynobj, s); 3090 3091 if (CONST_STRNEQ (name, ".rel")) 3092 { 3093 if (s->size == 0) 3094 { 3095 /* We only strip the section if the output section name 3096 has the same name. Otherwise, there might be several 3097 input sections for this output section. FIXME: This 3098 code is probably not needed these days anyhow, since 3099 the linker now does not create empty output sections. */ 3100 if (s->output_section != NULL 3101 && strcmp (name, 3102 bfd_get_section_name (s->output_section->owner, 3103 s->output_section)) == 0) 3104 s->flags |= SEC_EXCLUDE; 3105 } 3106 else 3107 { 3108 const char *outname; 3109 asection *target; 3110 3111 /* If this relocation section applies to a read only 3112 section, then we probably need a DT_TEXTREL entry. 3113 If the relocation section is .rel.dyn, we always 3114 assert a DT_TEXTREL entry rather than testing whether 3115 there exists a relocation to a read only section or 3116 not. */ 3117 outname = bfd_get_section_name (output_bfd, s->output_section); 3118 target = bfd_get_section_by_name (output_bfd, outname + 4); 3119 if ((target != NULL 3120 && (target->flags & SEC_READONLY) != 0 3121 && (target->flags & SEC_ALLOC) != 0) || strcmp (outname, ".rel.dyn") == 0) 3122 reltext = TRUE; 3123 3124 /* We use the reloc_count field as a counter if we need 3125 to copy relocs into the output file. */ 3126 if (strcmp (name, ".rel.dyn") != 0) 3127 s->reloc_count = 0; 3128 } 3129 } 3130 else if (CONST_STRNEQ (name, ".got")) 3131 { 3132 /* s7_bfd_score_elf_always_size_sections() has already done 3133 most of the work, but some symbols may have been mapped 3134 to versions that we must now resolve in the got_entries 3135 hash tables. */ 3136 } 3137 else if (strcmp (name, SCORE_ELF_STUB_SECTION_NAME) == 0) 3138 { 3139 /* IRIX rld assumes that the function stub isn't at the end 3140 of .text section. So put a dummy. XXX */ 3141 s->size += SCORE_FUNCTION_STUB_SIZE; 3142 } 3143 else if (! CONST_STRNEQ (name, ".init")) 3144 { 3145 /* It's not one of our sections, so don't allocate space. */ 3146 continue; 3147 } 3148 3149 /* Allocate memory for the section contents. */ 3150 s->contents = bfd_zalloc (dynobj, s->size); 3151 if (s->contents == NULL && s->size != 0) 3152 { 3153 bfd_set_error (bfd_error_no_memory); 3154 return FALSE; 3155 } 3156 } 3157 3158 if (elf_hash_table (info)->dynamic_sections_created) 3159 { 3160 /* Add some entries to the .dynamic section. We fill in the 3161 values later, in s7_bfd_score_elf_finish_dynamic_sections, but we 3162 must add the entries now so that we get the correct size for 3163 the .dynamic section. The DT_DEBUG entry is filled in by the 3164 dynamic linker and used by the debugger. */ 3165 3166 if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_DEBUG, 0)) 3167 return FALSE; 3168 3169 if (reltext) 3170 info->flags |= DF_TEXTREL; 3171 3172 if ((info->flags & DF_TEXTREL) != 0) 3173 { 3174 if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_TEXTREL, 0)) 3175 return FALSE; 3176 } 3177 3178 if (! SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_PLTGOT, 0)) 3179 return FALSE; 3180 3181 if (score_elf_rel_dyn_section (dynobj, FALSE)) 3182 { 3183 if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_REL, 0)) 3184 return FALSE; 3185 3186 if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_RELSZ, 0)) 3187 return FALSE; 3188 3189 if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_RELENT, 0)) 3190 return FALSE; 3191 } 3192 3193 if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_SCORE_BASE_ADDRESS, 0)) 3194 return FALSE; 3195 3196 if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_SCORE_LOCAL_GOTNO, 0)) 3197 return FALSE; 3198 3199 if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_SCORE_SYMTABNO, 0)) 3200 return FALSE; 3201 3202 if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_SCORE_UNREFEXTNO, 0)) 3203 return FALSE; 3204 3205 if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_SCORE_GOTSYM, 0)) 3206 return FALSE; 3207 3208 if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_SCORE_HIPAGENO, 0)) 3209 return FALSE; 3210 } 3211 3212 return TRUE; 3213 } 3214 3215 bfd_boolean 3216 s7_bfd_score_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) 3217 { 3218 struct elf_link_hash_entry *h; 3219 struct bfd_link_hash_entry *bh; 3220 flagword flags; 3221 asection *s; 3222 3223 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY 3224 | SEC_LINKER_CREATED | SEC_READONLY); 3225 3226 /* ABI requests the .dynamic section to be read only. */ 3227 s = bfd_get_linker_section (abfd, ".dynamic"); 3228 if (s != NULL) 3229 { 3230 if (!bfd_set_section_flags (abfd, s, flags)) 3231 return FALSE; 3232 } 3233 3234 /* We need to create .got section. */ 3235 if (!score_elf_create_got_section (abfd, info, FALSE)) 3236 return FALSE; 3237 3238 if (!score_elf_rel_dyn_section (elf_hash_table (info)->dynobj, TRUE)) 3239 return FALSE; 3240 3241 /* Create .stub section. */ 3242 if (bfd_get_linker_section (abfd, SCORE_ELF_STUB_SECTION_NAME) == NULL) 3243 { 3244 s = bfd_make_section_anyway_with_flags (abfd, SCORE_ELF_STUB_SECTION_NAME, 3245 flags | SEC_CODE); 3246 if (s == NULL 3247 || !bfd_set_section_alignment (abfd, s, 2)) 3248 3249 return FALSE; 3250 } 3251 3252 if (!info->shared) 3253 { 3254 const char *name; 3255 3256 name = "_DYNAMIC_LINK"; 3257 bh = NULL; 3258 if (!(_bfd_generic_link_add_one_symbol 3259 (info, abfd, name, BSF_GLOBAL, bfd_abs_section_ptr, 3260 (bfd_vma) 0, NULL, FALSE, get_elf_backend_data (abfd)->collect, &bh))) 3261 return FALSE; 3262 3263 h = (struct elf_link_hash_entry *) bh; 3264 h->non_elf = 0; 3265 h->def_regular = 1; 3266 h->type = STT_SECTION; 3267 3268 if (!bfd_elf_link_record_dynamic_symbol (info, h)) 3269 return FALSE; 3270 } 3271 3272 return TRUE; 3273 } 3274 3275 3276 /* Finish up dynamic symbol handling. We set the contents of various 3277 dynamic sections here. */ 3278 3279 bfd_boolean 3280 s7_bfd_score_elf_finish_dynamic_symbol (bfd *output_bfd, 3281 struct bfd_link_info *info, 3282 struct elf_link_hash_entry *h, 3283 Elf_Internal_Sym *sym) 3284 { 3285 bfd *dynobj; 3286 asection *sgot; 3287 struct score_got_info *g; 3288 const char *name; 3289 3290 dynobj = elf_hash_table (info)->dynobj; 3291 3292 if (h->plt.offset != MINUS_ONE) 3293 { 3294 asection *s; 3295 bfd_byte stub[SCORE_FUNCTION_STUB_SIZE]; 3296 3297 /* This symbol has a stub. Set it up. */ 3298 BFD_ASSERT (h->dynindx != -1); 3299 3300 s = bfd_get_linker_section (dynobj, SCORE_ELF_STUB_SECTION_NAME); 3301 BFD_ASSERT (s != NULL); 3302 3303 /* FIXME: Can h->dynindex be more than 64K? */ 3304 if (h->dynindx & 0xffff0000) 3305 return FALSE; 3306 3307 /* Fill the stub. */ 3308 bfd_put_32 (output_bfd, STUB_LW, stub); 3309 bfd_put_32 (output_bfd, STUB_MOVE, stub + 4); 3310 bfd_put_32 (output_bfd, STUB_LI16 | (h->dynindx << 1), stub + 8); 3311 bfd_put_32 (output_bfd, STUB_BRL, stub + 12); 3312 3313 BFD_ASSERT (h->plt.offset <= s->size); 3314 memcpy (s->contents + h->plt.offset, stub, SCORE_FUNCTION_STUB_SIZE); 3315 3316 /* Mark the symbol as undefined. plt.offset != -1 occurs 3317 only for the referenced symbol. */ 3318 sym->st_shndx = SHN_UNDEF; 3319 3320 /* The run-time linker uses the st_value field of the symbol 3321 to reset the global offset table entry for this external 3322 to its stub address when unlinking a shared object. */ 3323 sym->st_value = (s->output_section->vma + s->output_offset + h->plt.offset); 3324 } 3325 3326 BFD_ASSERT (h->dynindx != -1 || h->forced_local); 3327 3328 sgot = score_elf_got_section (dynobj, FALSE); 3329 BFD_ASSERT (sgot != NULL); 3330 BFD_ASSERT (score_elf_section_data (sgot) != NULL); 3331 g = score_elf_section_data (sgot)->u.got_info; 3332 BFD_ASSERT (g != NULL); 3333 3334 /* Run through the global symbol table, creating GOT entries for all 3335 the symbols that need them. */ 3336 if (g->global_gotsym != NULL && h->dynindx >= g->global_gotsym->dynindx) 3337 { 3338 bfd_vma offset; 3339 bfd_vma value; 3340 3341 value = sym->st_value; 3342 offset = score_elf_global_got_index (dynobj, h); 3343 bfd_put_32 (output_bfd, value, sgot->contents + offset); 3344 } 3345 3346 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ 3347 name = h->root.root.string; 3348 if (strcmp (name, "_DYNAMIC") == 0 || strcmp (name, "_GLOBAL_OFFSET_TABLE_") == 0) 3349 sym->st_shndx = SHN_ABS; 3350 else if (strcmp (name, "_DYNAMIC_LINK") == 0) 3351 { 3352 sym->st_shndx = SHN_ABS; 3353 sym->st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION); 3354 sym->st_value = 1; 3355 } 3356 else if (strcmp (name, GP_DISP_LABEL) == 0) 3357 { 3358 sym->st_shndx = SHN_ABS; 3359 sym->st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION); 3360 sym->st_value = elf_gp (output_bfd); 3361 } 3362 3363 return TRUE; 3364 } 3365 3366 /* Finish up the dynamic sections. */ 3367 3368 bfd_boolean 3369 s7_bfd_score_elf_finish_dynamic_sections (bfd *output_bfd, 3370 struct bfd_link_info *info) 3371 { 3372 bfd *dynobj; 3373 asection *sdyn; 3374 asection *sgot; 3375 asection *s; 3376 struct score_got_info *g; 3377 3378 dynobj = elf_hash_table (info)->dynobj; 3379 3380 sdyn = bfd_get_linker_section (dynobj, ".dynamic"); 3381 3382 sgot = score_elf_got_section (dynobj, FALSE); 3383 if (sgot == NULL) 3384 g = NULL; 3385 else 3386 { 3387 BFD_ASSERT (score_elf_section_data (sgot) != NULL); 3388 g = score_elf_section_data (sgot)->u.got_info; 3389 BFD_ASSERT (g != NULL); 3390 } 3391 3392 if (elf_hash_table (info)->dynamic_sections_created) 3393 { 3394 bfd_byte *b; 3395 3396 BFD_ASSERT (sdyn != NULL); 3397 BFD_ASSERT (g != NULL); 3398 3399 for (b = sdyn->contents; 3400 b < sdyn->contents + sdyn->size; 3401 b += SCORE_ELF_DYN_SIZE (dynobj)) 3402 { 3403 Elf_Internal_Dyn dyn; 3404 const char *name; 3405 size_t elemsize; 3406 bfd_boolean swap_out_p; 3407 3408 /* Read in the current dynamic entry. */ 3409 (*get_elf_backend_data (dynobj)->s->swap_dyn_in) (dynobj, b, &dyn); 3410 3411 /* Assume that we're going to modify it and write it out. */ 3412 swap_out_p = TRUE; 3413 3414 switch (dyn.d_tag) 3415 { 3416 case DT_RELENT: 3417 s = score_elf_rel_dyn_section (dynobj, FALSE); 3418 BFD_ASSERT (s != NULL); 3419 dyn.d_un.d_val = SCORE_ELF_REL_SIZE (dynobj); 3420 break; 3421 3422 case DT_STRSZ: 3423 /* Rewrite DT_STRSZ. */ 3424 dyn.d_un.d_val = _bfd_elf_strtab_size (elf_hash_table (info)->dynstr); 3425 break; 3426 3427 case DT_PLTGOT: 3428 name = ".got"; 3429 s = bfd_get_section_by_name (output_bfd, name); 3430 BFD_ASSERT (s != NULL); 3431 dyn.d_un.d_ptr = s->vma; 3432 break; 3433 3434 case DT_SCORE_BASE_ADDRESS: 3435 s = output_bfd->sections; 3436 BFD_ASSERT (s != NULL); 3437 dyn.d_un.d_ptr = s->vma & ~(bfd_vma) 0xffff; 3438 break; 3439 3440 case DT_SCORE_LOCAL_GOTNO: 3441 dyn.d_un.d_val = g->local_gotno; 3442 break; 3443 3444 case DT_SCORE_UNREFEXTNO: 3445 /* The index into the dynamic symbol table which is the 3446 entry of the first external symbol that is not 3447 referenced within the same object. */ 3448 dyn.d_un.d_val = bfd_count_sections (output_bfd) + 1; 3449 break; 3450 3451 case DT_SCORE_GOTSYM: 3452 if (g->global_gotsym) 3453 { 3454 dyn.d_un.d_val = g->global_gotsym->dynindx; 3455 break; 3456 } 3457 /* In case if we don't have global got symbols we default 3458 to setting DT_SCORE_GOTSYM to the same value as 3459 DT_SCORE_SYMTABNO, so we just fall through. */ 3460 3461 case DT_SCORE_SYMTABNO: 3462 name = ".dynsym"; 3463 elemsize = SCORE_ELF_SYM_SIZE (output_bfd); 3464 s = bfd_get_section_by_name (output_bfd, name); 3465 BFD_ASSERT (s != NULL); 3466 3467 dyn.d_un.d_val = s->size / elemsize; 3468 break; 3469 3470 case DT_SCORE_HIPAGENO: 3471 dyn.d_un.d_val = g->local_gotno - SCORE_RESERVED_GOTNO; 3472 break; 3473 3474 default: 3475 swap_out_p = FALSE; 3476 break; 3477 } 3478 3479 if (swap_out_p) 3480 (*get_elf_backend_data (dynobj)->s->swap_dyn_out) (dynobj, &dyn, b); 3481 } 3482 } 3483 3484 /* The first entry of the global offset table will be filled at 3485 runtime. The second entry will be used by some runtime loaders. 3486 This isn't the case of IRIX rld. */ 3487 if (sgot != NULL && sgot->size > 0) 3488 { 3489 bfd_put_32 (output_bfd, 0, sgot->contents); 3490 bfd_put_32 (output_bfd, 0x80000000, sgot->contents + SCORE_ELF_GOT_SIZE (output_bfd)); 3491 } 3492 3493 if (sgot != NULL) 3494 elf_section_data (sgot->output_section)->this_hdr.sh_entsize 3495 = SCORE_ELF_GOT_SIZE (output_bfd); 3496 3497 3498 /* We need to sort the entries of the dynamic relocation section. */ 3499 s = score_elf_rel_dyn_section (dynobj, FALSE); 3500 3501 if (s != NULL && s->size > (bfd_vma)2 * SCORE_ELF_REL_SIZE (output_bfd)) 3502 { 3503 reldyn_sorting_bfd = output_bfd; 3504 qsort ((Elf32_External_Rel *) s->contents + 1, s->reloc_count - 1, 3505 sizeof (Elf32_External_Rel), score_elf_sort_dynamic_relocs); 3506 } 3507 3508 return TRUE; 3509 } 3510 3511 /* This function set up the ELF section header for a BFD section in preparation for writing 3512 it out. This is where the flags and type fields are set for unusual sections. */ 3513 3514 bfd_boolean 3515 s7_bfd_score_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED, 3516 Elf_Internal_Shdr *hdr, 3517 asection *sec) 3518 { 3519 const char *name; 3520 3521 name = bfd_get_section_name (abfd, sec); 3522 3523 if (strcmp (name, ".got") == 0 3524 || strcmp (name, ".srdata") == 0 3525 || strcmp (name, ".sdata") == 0 3526 || strcmp (name, ".sbss") == 0) 3527 hdr->sh_flags |= SHF_SCORE_GPREL; 3528 3529 return TRUE; 3530 } 3531 3532 /* This function do additional processing on the ELF section header before writing 3533 it out. This is used to set the flags and type fields for some sections. */ 3534 3535 /* assign_file_positions_except_relocs() check section flag and if it is allocatable, 3536 warning message will be issued. backend_fake_section is called before 3537 assign_file_positions_except_relocs(); backend_section_processing after it. so, we 3538 modify section flag there, but not backend_fake_section. */ 3539 3540 bfd_boolean 3541 s7_bfd_score_elf_section_processing (bfd *abfd ATTRIBUTE_UNUSED, Elf_Internal_Shdr *hdr) 3542 { 3543 if (hdr->bfd_section != NULL) 3544 { 3545 const char *name = bfd_get_section_name (abfd, hdr->bfd_section); 3546 3547 if (strcmp (name, ".sdata") == 0) 3548 { 3549 hdr->sh_flags |= SHF_ALLOC | SHF_WRITE | SHF_SCORE_GPREL; 3550 hdr->sh_type = SHT_PROGBITS; 3551 } 3552 else if (strcmp (name, ".sbss") == 0) 3553 { 3554 hdr->sh_flags |= SHF_ALLOC | SHF_WRITE | SHF_SCORE_GPREL; 3555 hdr->sh_type = SHT_NOBITS; 3556 } 3557 else if (strcmp (name, ".srdata") == 0) 3558 { 3559 hdr->sh_flags |= SHF_ALLOC | SHF_SCORE_GPREL; 3560 hdr->sh_type = SHT_PROGBITS; 3561 } 3562 } 3563 3564 return TRUE; 3565 } 3566 3567 bfd_boolean 3568 s7_bfd_score_elf_write_section (bfd *output_bfd, asection *sec, bfd_byte *contents) 3569 { 3570 bfd_byte *to, *from, *end; 3571 int i; 3572 3573 if (strcmp (sec->name, ".pdr") != 0) 3574 return FALSE; 3575 3576 if (score_elf_section_data (sec)->u.tdata == NULL) 3577 return FALSE; 3578 3579 to = contents; 3580 end = contents + sec->size; 3581 for (from = contents, i = 0; from < end; from += PDR_SIZE, i++) 3582 { 3583 if ((score_elf_section_data (sec)->u.tdata)[i] == 1) 3584 continue; 3585 3586 if (to != from) 3587 memcpy (to, from, PDR_SIZE); 3588 3589 to += PDR_SIZE; 3590 } 3591 bfd_set_section_contents (output_bfd, sec->output_section, contents, 3592 (file_ptr) sec->output_offset, sec->size); 3593 3594 return TRUE; 3595 } 3596 3597 /* Copy data from a SCORE ELF indirect symbol to its direct symbol, hiding the old 3598 indirect symbol. Process additional relocation information. */ 3599 3600 void 3601 s7_bfd_score_elf_copy_indirect_symbol (struct bfd_link_info *info, 3602 struct elf_link_hash_entry *dir, 3603 struct elf_link_hash_entry *ind) 3604 { 3605 struct score_elf_link_hash_entry *dirscore, *indscore; 3606 3607 _bfd_elf_link_hash_copy_indirect (info, dir, ind); 3608 3609 if (ind->root.type != bfd_link_hash_indirect) 3610 return; 3611 3612 dirscore = (struct score_elf_link_hash_entry *) dir; 3613 indscore = (struct score_elf_link_hash_entry *) ind; 3614 dirscore->possibly_dynamic_relocs += indscore->possibly_dynamic_relocs; 3615 3616 if (indscore->readonly_reloc) 3617 dirscore->readonly_reloc = TRUE; 3618 3619 if (indscore->no_fn_stub) 3620 dirscore->no_fn_stub = TRUE; 3621 } 3622 3623 /* Remove information about discarded functions from other sections which mention them. */ 3624 3625 bfd_boolean 3626 s7_bfd_score_elf_discard_info (bfd *abfd, 3627 struct elf_reloc_cookie *cookie, 3628 struct bfd_link_info *info) 3629 { 3630 asection *o; 3631 bfd_boolean ret = FALSE; 3632 unsigned char *tdata; 3633 size_t i, skip; 3634 3635 o = bfd_get_section_by_name (abfd, ".pdr"); 3636 if ((!o) || (o->size == 0) || (o->size % PDR_SIZE != 0) 3637 || (o->output_section != NULL && bfd_is_abs_section (o->output_section))) 3638 return FALSE; 3639 3640 tdata = bfd_zmalloc (o->size / PDR_SIZE); 3641 if (!tdata) 3642 return FALSE; 3643 3644 cookie->rels = _bfd_elf_link_read_relocs (abfd, o, NULL, NULL, info->keep_memory); 3645 if (!cookie->rels) 3646 { 3647 free (tdata); 3648 return FALSE; 3649 } 3650 3651 cookie->rel = cookie->rels; 3652 cookie->relend = cookie->rels + o->reloc_count; 3653 3654 for (i = 0, skip = 0; i < o->size; i++) 3655 { 3656 if (bfd_elf_reloc_symbol_deleted_p (i * PDR_SIZE, cookie)) 3657 { 3658 tdata[i] = 1; 3659 skip++; 3660 } 3661 } 3662 3663 if (skip != 0) 3664 { 3665 score_elf_section_data (o)->u.tdata = tdata; 3666 o->size -= skip * PDR_SIZE; 3667 ret = TRUE; 3668 } 3669 else 3670 free (tdata); 3671 3672 if (!info->keep_memory) 3673 free (cookie->rels); 3674 3675 return ret; 3676 } 3677 3678 /* Signal that discard_info() has removed the discarded relocations for this section. */ 3679 3680 bfd_boolean 3681 s7_bfd_score_elf_ignore_discarded_relocs (asection *sec) 3682 { 3683 if (strcmp (sec->name, ".pdr") == 0) 3684 return TRUE; 3685 return FALSE; 3686 } 3687 3688 /* Return the section that should be marked against GC for a given 3689 relocation. */ 3690 3691 asection * 3692 s7_bfd_score_elf_gc_mark_hook (asection *sec, 3693 struct bfd_link_info *info, 3694 Elf_Internal_Rela *rel, 3695 struct elf_link_hash_entry *h, 3696 Elf_Internal_Sym *sym) 3697 { 3698 if (h != NULL) 3699 switch (ELF32_R_TYPE (rel->r_info)) 3700 { 3701 case R_SCORE_GNU_VTINHERIT: 3702 case R_SCORE_GNU_VTENTRY: 3703 return NULL; 3704 } 3705 3706 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 3707 } 3708 3709 /* Support for core dump NOTE sections. */ 3710 3711 bfd_boolean 3712 s7_bfd_score_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) 3713 { 3714 int offset; 3715 unsigned int raw_size; 3716 3717 switch (note->descsz) 3718 { 3719 default: 3720 return FALSE; 3721 case 272: /* Linux/Score elf_prstatus */ 3722 3723 /* pr_cursig */ 3724 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12); 3725 3726 /* pr_pid */ 3727 elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 24); 3728 3729 /* pr_reg */ 3730 offset = 72; 3731 3732 /* sizeof(elf_gregset_t) */ 3733 raw_size = 196; 3734 3735 break; 3736 } 3737 3738 /* Make a ".reg/999" section. */ 3739 return _bfd_elfcore_make_pseudosection (abfd, ".reg", raw_size, note->descpos + offset); 3740 } 3741 3742 bfd_boolean 3743 s7_bfd_score_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) 3744 { 3745 switch (note->descsz) 3746 { 3747 default: 3748 return FALSE; 3749 3750 case 128: /* Linux/Score elf_prpsinfo. */ 3751 /* pr_fname */ 3752 elf_tdata (abfd)->core_program = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16); 3753 3754 /* pr_psargs */ 3755 elf_tdata (abfd)->core_command = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80); 3756 break; 3757 } 3758 3759 /* Note that for some reason, a spurious space is tacked 3760 onto the end of the args in some (at least one anyway) 3761 implementations, so strip it off if it exists. */ 3762 3763 { 3764 char *command = elf_tdata (abfd)->core_command; 3765 int n = strlen (command); 3766 3767 if (0 < n && command[n - 1] == ' ') 3768 command[n - 1] = '\0'; 3769 } 3770 3771 return TRUE; 3772 } 3773 3774 3775 /* Score BFD functions. */ 3776 3777 reloc_howto_type * 3778 s7_elf32_score_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, bfd_reloc_code_real_type code) 3779 { 3780 unsigned int i; 3781 3782 for (i = 0; i < ARRAY_SIZE (elf32_score_reloc_map); i++) 3783 if (elf32_score_reloc_map[i].bfd_reloc_val == code) 3784 return &elf32_score_howto_table[elf32_score_reloc_map[i].elf_reloc_val]; 3785 3786 return NULL; 3787 } 3788 3789 bfd_boolean 3790 s7_elf32_score_print_private_bfd_data (bfd *abfd, void * ptr) 3791 { 3792 FILE *file = (FILE *) ptr; 3793 3794 BFD_ASSERT (abfd != NULL && ptr != NULL); 3795 3796 /* Print normal ELF private data. */ 3797 _bfd_elf_print_private_bfd_data (abfd, ptr); 3798 3799 /* xgettext:c-format */ 3800 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); 3801 if (elf_elfheader (abfd)->e_flags & EF_SCORE_PIC) 3802 { 3803 fprintf (file, _(" [pic]")); 3804 } 3805 if (elf_elfheader (abfd)->e_flags & EF_SCORE_FIXDEP) 3806 { 3807 fprintf (file, _(" [fix dep]")); 3808 } 3809 fputc ('\n', file); 3810 3811 return TRUE; 3812 } 3813 3814 bfd_boolean 3815 s7_elf32_score_merge_private_bfd_data (bfd *ibfd, bfd *obfd) 3816 { 3817 flagword in_flags; 3818 flagword out_flags; 3819 3820 if (!_bfd_generic_verify_endian_match (ibfd, obfd)) 3821 return FALSE; 3822 3823 in_flags = elf_elfheader (ibfd)->e_flags; 3824 out_flags = elf_elfheader (obfd)->e_flags; 3825 3826 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour 3827 || bfd_get_flavour (obfd) != bfd_target_elf_flavour) 3828 return TRUE; 3829 3830 in_flags = elf_elfheader (ibfd)->e_flags; 3831 out_flags = elf_elfheader (obfd)->e_flags; 3832 3833 if (! elf_flags_init (obfd)) 3834 { 3835 elf_flags_init (obfd) = TRUE; 3836 elf_elfheader (obfd)->e_flags = in_flags; 3837 3838 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) 3839 && bfd_get_arch_info (obfd)->the_default) 3840 { 3841 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd)); 3842 } 3843 3844 return TRUE; 3845 } 3846 3847 if (((in_flags & EF_SCORE_PIC) != 0) != ((out_flags & EF_SCORE_PIC) != 0)) 3848 { 3849 (*_bfd_error_handler) (_("%B: warning: linking PIC files with non-PIC files"), ibfd); 3850 } 3851 3852 /* Maybe dependency fix compatibility should be checked here. */ 3853 return TRUE; 3854 } 3855 3856 bfd_boolean 3857 s7_elf32_score_new_section_hook (bfd *abfd, asection *sec) 3858 { 3859 struct _score_elf_section_data *sdata; 3860 bfd_size_type amt = sizeof (*sdata); 3861 3862 sdata = bfd_zalloc (abfd, amt); 3863 if (sdata == NULL) 3864 return FALSE; 3865 sec->used_by_bfd = sdata; 3866 3867 return _bfd_elf_new_section_hook (abfd, sec); 3868 } 3869 3870 #define elf_backend_omit_section_dynsym \ 3871 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true) 3872