1 /* Lattice Mico32-specific support for 32-bit ELF 2 Copyright (C) 2008-2020 Free Software Foundation, Inc. 3 Contributed by Jon Beniston <jon@beniston.com> 4 5 This file is part of BFD, the Binary File Descriptor library. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program; if not, write to the Free Software 19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 20 MA 02110-1301, USA. */ 21 22 #include "sysdep.h" 23 #include "bfd.h" 24 #include "libbfd.h" 25 #include "elf-bfd.h" 26 #include "elf/lm32.h" 27 28 #define DEFAULT_STACK_SIZE 0x20000 29 30 #define PLT_ENTRY_SIZE 20 31 32 #define PLT0_ENTRY_WORD0 0 33 #define PLT0_ENTRY_WORD1 0 34 #define PLT0_ENTRY_WORD2 0 35 #define PLT0_ENTRY_WORD3 0 36 #define PLT0_ENTRY_WORD4 0 37 38 #define PLT0_PIC_ENTRY_WORD0 0 39 #define PLT0_PIC_ENTRY_WORD1 0 40 #define PLT0_PIC_ENTRY_WORD2 0 41 #define PLT0_PIC_ENTRY_WORD3 0 42 #define PLT0_PIC_ENTRY_WORD4 0 43 44 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1" 45 46 extern const bfd_target lm32_elf32_fdpic_vec; 47 48 #define IS_FDPIC(bfd) ((bfd)->xvec == &lm32_elf32_fdpic_vec) 49 50 static bfd_reloc_status_type lm32_elf_gprel_reloc 51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 52 53 /* lm32 ELF linker hash entry. */ 54 55 struct elf_lm32_link_hash_entry 56 { 57 struct elf_link_hash_entry root; 58 59 /* Track dynamic relocs copied for this symbol. */ 60 struct elf_dyn_relocs *dyn_relocs; 61 }; 62 63 /* lm32 ELF linker hash table. */ 64 65 struct elf_lm32_link_hash_table 66 { 67 struct elf_link_hash_table root; 68 69 /* Short-cuts to get to dynamic linker sections. */ 70 asection *sfixup32; 71 asection *sdynbss; 72 asection *srelbss; 73 74 int relocs32; 75 }; 76 77 /* Get the lm32 ELF linker hash table from a link_info structure. */ 78 79 #define lm32_elf_hash_table(p) \ 80 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ 81 == LM32_ELF_DATA ? ((struct elf_lm32_link_hash_table *) ((p)->hash)) : NULL) 82 83 #define lm32fdpic_got_section(info) \ 84 (lm32_elf_hash_table (info)->root.sgot) 85 #define lm32fdpic_gotrel_section(info) \ 86 (lm32_elf_hash_table (info)->root.srelgot) 87 #define lm32fdpic_fixup32_section(info) \ 88 (lm32_elf_hash_table (info)->sfixup32) 89 90 struct weak_symbol_list 91 { 92 const char *name; 93 struct weak_symbol_list *next; 94 }; 95 96 /* Create an entry in an lm32 ELF linker hash table. */ 97 98 static struct bfd_hash_entry * 99 lm32_elf_link_hash_newfunc (struct bfd_hash_entry *entry, 100 struct bfd_hash_table *table, 101 const char *string) 102 { 103 struct elf_lm32_link_hash_entry *ret = 104 (struct elf_lm32_link_hash_entry *) entry; 105 106 /* Allocate the structure if it has not already been allocated by a 107 subclass. */ 108 if (ret == NULL) 109 ret = bfd_hash_allocate (table, 110 sizeof (struct elf_lm32_link_hash_entry)); 111 if (ret == NULL) 112 return NULL; 113 114 /* Call the allocation method of the superclass. */ 115 ret = ((struct elf_lm32_link_hash_entry *) 116 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, 117 table, string)); 118 if (ret != NULL) 119 { 120 struct elf_lm32_link_hash_entry *eh; 121 122 eh = (struct elf_lm32_link_hash_entry *) ret; 123 eh->dyn_relocs = NULL; 124 } 125 126 return (struct bfd_hash_entry *) ret; 127 } 128 129 /* Create an lm32 ELF linker hash table. */ 130 131 static struct bfd_link_hash_table * 132 lm32_elf_link_hash_table_create (bfd *abfd) 133 { 134 struct elf_lm32_link_hash_table *ret; 135 bfd_size_type amt = sizeof (struct elf_lm32_link_hash_table); 136 137 ret = bfd_zmalloc (amt); 138 if (ret == NULL) 139 return NULL; 140 141 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, 142 lm32_elf_link_hash_newfunc, 143 sizeof (struct elf_lm32_link_hash_entry), 144 LM32_ELF_DATA)) 145 { 146 free (ret); 147 return NULL; 148 } 149 150 return &ret->root.root; 151 } 152 153 /* Add a fixup to the ROFIXUP section. */ 154 155 static bfd_vma 156 _lm32fdpic_add_rofixup (bfd *output_bfd, asection *rofixup, bfd_vma relocation) 157 { 158 bfd_vma fixup_offset; 159 160 if (rofixup->flags & SEC_EXCLUDE) 161 return -1; 162 163 fixup_offset = rofixup->reloc_count * 4; 164 if (rofixup->contents) 165 { 166 BFD_ASSERT (fixup_offset < rofixup->size); 167 if (fixup_offset < rofixup->size) 168 bfd_put_32 (output_bfd, relocation, rofixup->contents + fixup_offset); 169 } 170 rofixup->reloc_count++; 171 172 return fixup_offset; 173 } 174 175 /* Create .rofixup sections in DYNOBJ, and set up 176 shortcuts to them in our hash table. */ 177 178 static bfd_boolean 179 create_rofixup_section (bfd *dynobj, struct bfd_link_info *info) 180 { 181 struct elf_lm32_link_hash_table *htab; 182 htab = lm32_elf_hash_table (info); 183 184 if (htab == NULL) 185 return FALSE; 186 187 /* Fixup section for R_LM32_32 relocs. */ 188 lm32fdpic_fixup32_section (info) 189 = bfd_make_section_anyway_with_flags (dynobj, 190 ".rofixup", 191 (SEC_ALLOC 192 | SEC_LOAD 193 | SEC_HAS_CONTENTS 194 | SEC_IN_MEMORY 195 | SEC_LINKER_CREATED 196 | SEC_READONLY)); 197 if (lm32fdpic_fixup32_section (info) == NULL 198 || !bfd_set_section_alignment (lm32fdpic_fixup32_section (info), 2)) 199 return FALSE; 200 201 return TRUE; 202 } 203 204 static reloc_howto_type lm32_elf_howto_table [] = 205 { 206 /* This reloc does nothing. */ 207 HOWTO (R_LM32_NONE, /* type */ 208 0, /* rightshift */ 209 3, /* size (0 = byte, 1 = short, 2 = long) */ 210 0, /* bitsize */ 211 FALSE, /* pc_relative */ 212 0, /* bitpos */ 213 complain_overflow_dont, /* complain_on_overflow */ 214 bfd_elf_generic_reloc, /* special_function */ 215 "R_LM32_NONE", /* name */ 216 FALSE, /* partial_inplace */ 217 0, /* src_mask */ 218 0, /* dst_mask */ 219 FALSE), /* pcrel_offset */ 220 221 /* An 8 bit absolute relocation. */ 222 HOWTO (R_LM32_8, /* type */ 223 0, /* rightshift */ 224 0, /* size (0 = byte, 1 = short, 2 = long) */ 225 8, /* bitsize */ 226 FALSE, /* pc_relative */ 227 0, /* bitpos */ 228 complain_overflow_bitfield,/* complain_on_overflow */ 229 bfd_elf_generic_reloc, /* special_function */ 230 "R_LM32_8", /* name */ 231 FALSE, /* partial_inplace */ 232 0, /* src_mask */ 233 0xff, /* dst_mask */ 234 FALSE), /* pcrel_offset */ 235 236 /* A 16 bit absolute relocation. */ 237 HOWTO (R_LM32_16, /* type */ 238 0, /* rightshift */ 239 1, /* size (0 = byte, 1 = short, 2 = long) */ 240 16, /* bitsize */ 241 FALSE, /* pc_relative */ 242 0, /* bitpos */ 243 complain_overflow_bitfield,/* complain_on_overflow */ 244 bfd_elf_generic_reloc, /* special_function */ 245 "R_LM32_16", /* name */ 246 FALSE, /* partial_inplace */ 247 0, /* src_mask */ 248 0xffff, /* dst_mask */ 249 FALSE), /* pcrel_offset */ 250 251 /* A 32 bit absolute relocation. */ 252 HOWTO (R_LM32_32, /* type */ 253 0, /* rightshift */ 254 2, /* size (0 = byte, 1 = short, 2 = long) */ 255 32, /* bitsize */ 256 FALSE, /* pc_relative */ 257 0, /* bitpos */ 258 complain_overflow_bitfield,/* complain_on_overflow */ 259 bfd_elf_generic_reloc, /* special_function */ 260 "R_LM32_32", /* name */ 261 FALSE, /* partial_inplace */ 262 0, /* src_mask */ 263 0xffffffff, /* dst_mask */ 264 FALSE), /* pcrel_offset */ 265 266 HOWTO (R_LM32_HI16, /* type */ 267 16, /* rightshift */ 268 2, /* size (0 = byte, 1 = short, 2 = long) */ 269 16, /* bitsize */ 270 FALSE, /* pc_relative */ 271 0, /* bitpos */ 272 complain_overflow_bitfield,/* complain_on_overflow */ 273 bfd_elf_generic_reloc, /* special_function */ 274 "R_LM32_HI16", /* name */ 275 FALSE, /* partial_inplace */ 276 0, /* src_mask */ 277 0xffff, /* dst_mask */ 278 FALSE), /* pcrel_offset */ 279 280 HOWTO (R_LM32_LO16, /* type */ 281 0, /* rightshift */ 282 2, /* size (0 = byte, 1 = short, 2 = long) */ 283 16, /* bitsize */ 284 FALSE, /* pc_relative */ 285 0, /* bitpos */ 286 complain_overflow_dont, /* complain_on_overflow */ 287 bfd_elf_generic_reloc, /* special_function */ 288 "R_LM32_LO16", /* name */ 289 FALSE, /* partial_inplace */ 290 0, /* src_mask */ 291 0xffff, /* dst_mask */ 292 FALSE), /* pcrel_offset */ 293 294 HOWTO (R_LM32_GPREL16, /* type */ 295 0, /* rightshift */ 296 2, /* size (0 = byte, 1 = short, 2 = long) */ 297 16, /* bitsize */ 298 FALSE, /* pc_relative */ 299 0, /* bitpos */ 300 complain_overflow_dont, /* complain_on_overflow */ 301 lm32_elf_gprel_reloc, /* special_function */ 302 "R_LM32_GPREL16", /* name */ 303 FALSE, /* partial_inplace */ 304 0, /* src_mask */ 305 0xffff, /* dst_mask */ 306 FALSE), /* pcrel_offset */ 307 308 HOWTO (R_LM32_CALL, /* type */ 309 2, /* rightshift */ 310 2, /* size (0 = byte, 1 = short, 2 = long) */ 311 26, /* bitsize */ 312 TRUE, /* pc_relative */ 313 0, /* bitpos */ 314 complain_overflow_signed, /* complain_on_overflow */ 315 bfd_elf_generic_reloc, /* special_function */ 316 "R_LM32_CALL", /* name */ 317 FALSE, /* partial_inplace */ 318 0, /* src_mask */ 319 0x3ffffff, /* dst_mask */ 320 TRUE), /* pcrel_offset */ 321 322 HOWTO (R_LM32_BRANCH, /* type */ 323 2, /* rightshift */ 324 2, /* size (0 = byte, 1 = short, 2 = long) */ 325 16, /* bitsize */ 326 TRUE, /* pc_relative */ 327 0, /* bitpos */ 328 complain_overflow_signed, /* complain_on_overflow */ 329 bfd_elf_generic_reloc, /* special_function */ 330 "R_LM32_BRANCH", /* name */ 331 FALSE, /* partial_inplace */ 332 0, /* src_mask */ 333 0xffff, /* dst_mask */ 334 TRUE), /* pcrel_offset */ 335 336 /* GNU extension to record C++ vtable hierarchy. */ 337 HOWTO (R_LM32_GNU_VTINHERIT, /* type */ 338 0, /* rightshift */ 339 2, /* size (0 = byte, 1 = short, 2 = long) */ 340 0, /* bitsize */ 341 FALSE, /* pc_relative */ 342 0, /* bitpos */ 343 complain_overflow_dont, /* complain_on_overflow */ 344 NULL, /* special_function */ 345 "R_LM32_GNU_VTINHERIT", /* name */ 346 FALSE, /* partial_inplace */ 347 0, /* src_mask */ 348 0, /* dst_mask */ 349 FALSE), /* pcrel_offset */ 350 351 /* GNU extension to record C++ vtable member usage. */ 352 HOWTO (R_LM32_GNU_VTENTRY, /* type */ 353 0, /* rightshift */ 354 2, /* size (0 = byte, 1 = short, 2 = long) */ 355 0, /* bitsize */ 356 FALSE, /* pc_relative */ 357 0, /* bitpos */ 358 complain_overflow_dont, /* complain_on_overflow */ 359 _bfd_elf_rel_vtable_reloc_fn,/* special_function */ 360 "R_LM32_GNU_VTENTRY", /* name */ 361 FALSE, /* partial_inplace */ 362 0, /* src_mask */ 363 0, /* dst_mask */ 364 FALSE), /* pcrel_offset */ 365 366 HOWTO (R_LM32_16_GOT, /* type */ 367 0, /* rightshift */ 368 2, /* size (0 = byte, 1 = short, 2 = long) */ 369 16, /* bitsize */ 370 FALSE, /* pc_relative */ 371 0, /* bitpos */ 372 complain_overflow_signed, /* complain_on_overflow */ 373 bfd_elf_generic_reloc, /* special_function */ 374 "R_LM32_16_GOT", /* name */ 375 FALSE, /* partial_inplace */ 376 0, /* src_mask */ 377 0xffff, /* dst_mask */ 378 FALSE), /* pcrel_offset */ 379 380 HOWTO (R_LM32_GOTOFF_HI16, /* type */ 381 16, /* rightshift */ 382 2, /* size (0 = byte, 1 = short, 2 = long) */ 383 16, /* bitsize */ 384 FALSE, /* pc_relative */ 385 0, /* bitpos */ 386 complain_overflow_dont, /* complain_on_overflow */ 387 bfd_elf_generic_reloc, /* special_function */ 388 "R_LM32_GOTOFF_HI16", /* name */ 389 FALSE, /* partial_inplace */ 390 0xffff, /* src_mask */ 391 0xffff, /* dst_mask */ 392 FALSE), /* pcrel_offset */ 393 394 HOWTO (R_LM32_GOTOFF_LO16, /* type */ 395 0, /* rightshift */ 396 2, /* size (0 = byte, 1 = short, 2 = long) */ 397 16, /* bitsize */ 398 FALSE, /* pc_relative */ 399 0, /* bitpos */ 400 complain_overflow_dont, /* complain_on_overflow */ 401 bfd_elf_generic_reloc, /* special_function */ 402 "R_LM32_GOTOFF_LO16", /* name */ 403 FALSE, /* partial_inplace */ 404 0xffff, /* src_mask */ 405 0xffff, /* dst_mask */ 406 FALSE), /* pcrel_offset */ 407 408 HOWTO (R_LM32_COPY, /* type */ 409 0, /* rightshift */ 410 2, /* size (0 = byte, 1 = short, 2 = long) */ 411 32, /* bitsize */ 412 FALSE, /* pc_relative */ 413 0, /* bitpos */ 414 complain_overflow_bitfield, /* complain_on_overflow */ 415 bfd_elf_generic_reloc, /* special_function */ 416 "R_LM32_COPY", /* name */ 417 FALSE, /* partial_inplace */ 418 0xffffffff, /* src_mask */ 419 0xffffffff, /* dst_mask */ 420 FALSE), /* pcrel_offset */ 421 422 HOWTO (R_LM32_GLOB_DAT, /* type */ 423 0, /* rightshift */ 424 2, /* size (0 = byte, 1 = short, 2 = long) */ 425 32, /* bitsize */ 426 FALSE, /* pc_relative */ 427 0, /* bitpos */ 428 complain_overflow_bitfield, /* complain_on_overflow */ 429 bfd_elf_generic_reloc, /* special_function */ 430 "R_LM32_GLOB_DAT", /* name */ 431 FALSE, /* partial_inplace */ 432 0xffffffff, /* src_mask */ 433 0xffffffff, /* dst_mask */ 434 FALSE), /* pcrel_offset */ 435 436 HOWTO (R_LM32_JMP_SLOT, /* type */ 437 0, /* rightshift */ 438 2, /* size (0 = byte, 1 = short, 2 = long) */ 439 32, /* bitsize */ 440 FALSE, /* pc_relative */ 441 0, /* bitpos */ 442 complain_overflow_bitfield, /* complain_on_overflow */ 443 bfd_elf_generic_reloc, /* special_function */ 444 "R_LM32_JMP_SLOT", /* name */ 445 FALSE, /* partial_inplace */ 446 0xffffffff, /* src_mask */ 447 0xffffffff, /* dst_mask */ 448 FALSE), /* pcrel_offset */ 449 450 HOWTO (R_LM32_RELATIVE, /* type */ 451 0, /* rightshift */ 452 2, /* size (0 = byte, 1 = short, 2 = long) */ 453 32, /* bitsize */ 454 FALSE, /* pc_relative */ 455 0, /* bitpos */ 456 complain_overflow_bitfield, /* complain_on_overflow */ 457 bfd_elf_generic_reloc, /* special_function */ 458 "R_LM32_RELATIVE", /* name */ 459 FALSE, /* partial_inplace */ 460 0xffffffff, /* src_mask */ 461 0xffffffff, /* dst_mask */ 462 FALSE), /* pcrel_offset */ 463 464 }; 465 466 /* Map BFD reloc types to lm32 ELF reloc types. */ 467 468 struct lm32_reloc_map 469 { 470 bfd_reloc_code_real_type bfd_reloc_val; 471 unsigned char elf_reloc_val; 472 }; 473 474 static const struct lm32_reloc_map lm32_reloc_map[] = 475 { 476 { BFD_RELOC_NONE, R_LM32_NONE }, 477 { BFD_RELOC_8, R_LM32_8 }, 478 { BFD_RELOC_16, R_LM32_16 }, 479 { BFD_RELOC_32, R_LM32_32 }, 480 { BFD_RELOC_HI16, R_LM32_HI16 }, 481 { BFD_RELOC_LO16, R_LM32_LO16 }, 482 { BFD_RELOC_GPREL16, R_LM32_GPREL16 }, 483 { BFD_RELOC_LM32_CALL, R_LM32_CALL }, 484 { BFD_RELOC_LM32_BRANCH, R_LM32_BRANCH }, 485 { BFD_RELOC_VTABLE_INHERIT, R_LM32_GNU_VTINHERIT }, 486 { BFD_RELOC_VTABLE_ENTRY, R_LM32_GNU_VTENTRY }, 487 { BFD_RELOC_LM32_16_GOT, R_LM32_16_GOT }, 488 { BFD_RELOC_LM32_GOTOFF_HI16, R_LM32_GOTOFF_HI16 }, 489 { BFD_RELOC_LM32_GOTOFF_LO16, R_LM32_GOTOFF_LO16 }, 490 { BFD_RELOC_LM32_COPY, R_LM32_COPY }, 491 { BFD_RELOC_LM32_GLOB_DAT, R_LM32_GLOB_DAT }, 492 { BFD_RELOC_LM32_JMP_SLOT, R_LM32_JMP_SLOT }, 493 { BFD_RELOC_LM32_RELATIVE, R_LM32_RELATIVE }, 494 }; 495 496 static reloc_howto_type * 497 lm32_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, 498 bfd_reloc_code_real_type code) 499 { 500 unsigned int i; 501 502 for (i = 0; i < sizeof (lm32_reloc_map) / sizeof (lm32_reloc_map[0]); i++) 503 if (lm32_reloc_map[i].bfd_reloc_val == code) 504 return &lm32_elf_howto_table[lm32_reloc_map[i].elf_reloc_val]; 505 return NULL; 506 } 507 508 static reloc_howto_type * 509 lm32_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 510 const char *r_name) 511 { 512 unsigned int i; 513 514 for (i = 0; 515 i < sizeof (lm32_elf_howto_table) / sizeof (lm32_elf_howto_table[0]); 516 i++) 517 if (lm32_elf_howto_table[i].name != NULL 518 && strcasecmp (lm32_elf_howto_table[i].name, r_name) == 0) 519 return &lm32_elf_howto_table[i]; 520 521 return NULL; 522 } 523 524 525 /* Set the howto pointer for an Lattice Mico32 ELF reloc. */ 526 527 static bfd_boolean 528 lm32_info_to_howto_rela (bfd *abfd, 529 arelent *cache_ptr, 530 Elf_Internal_Rela *dst) 531 { 532 unsigned int r_type; 533 534 r_type = ELF32_R_TYPE (dst->r_info); 535 if (r_type >= (unsigned int) R_LM32_max) 536 { 537 /* xgettext:c-format */ 538 _bfd_error_handler (_("%pB: unsupported relocation type %#x"), 539 abfd, r_type); 540 bfd_set_error (bfd_error_bad_value); 541 return FALSE; 542 } 543 cache_ptr->howto = &lm32_elf_howto_table[r_type]; 544 return TRUE; 545 } 546 547 /* Set the right machine number for an Lattice Mico32 ELF file. */ 548 549 static bfd_boolean 550 lm32_elf_object_p (bfd *abfd) 551 { 552 return bfd_default_set_arch_mach (abfd, bfd_arch_lm32, bfd_mach_lm32); 553 } 554 555 /* Set machine type flags just before file is written out. */ 556 557 static bfd_boolean 558 lm32_elf_final_write_processing (bfd *abfd) 559 { 560 elf_elfheader (abfd)->e_machine = EM_LATTICEMICO32; 561 elf_elfheader (abfd)->e_flags &=~ EF_LM32_MACH; 562 switch (bfd_get_mach (abfd)) 563 { 564 case bfd_mach_lm32: 565 elf_elfheader (abfd)->e_flags |= E_LM32_MACH; 566 break; 567 default: 568 abort (); 569 } 570 return _bfd_elf_final_write_processing (abfd); 571 } 572 573 /* Set the GP value for OUTPUT_BFD. Returns FALSE if this is a 574 dangerous relocation. */ 575 576 static bfd_boolean 577 lm32_elf_assign_gp (bfd *output_bfd, bfd_vma *pgp) 578 { 579 unsigned int count; 580 asymbol **sym; 581 unsigned int i; 582 583 /* If we've already figured out what GP will be, just return it. */ 584 *pgp = _bfd_get_gp_value (output_bfd); 585 if (*pgp) 586 return TRUE; 587 588 count = bfd_get_symcount (output_bfd); 589 sym = bfd_get_outsymbols (output_bfd); 590 591 /* The linker script will have created a symbol named `_gp' with the 592 appropriate value. */ 593 if (sym == NULL) 594 i = count; 595 else 596 { 597 for (i = 0; i < count; i++, sym++) 598 { 599 const char *name; 600 601 name = bfd_asymbol_name (*sym); 602 if (*name == '_' && strcmp (name, "_gp") == 0) 603 { 604 *pgp = bfd_asymbol_value (*sym); 605 _bfd_set_gp_value (output_bfd, *pgp); 606 break; 607 } 608 } 609 } 610 611 if (i >= count) 612 { 613 /* Only get the error once. */ 614 *pgp = 4; 615 _bfd_set_gp_value (output_bfd, *pgp); 616 return FALSE; 617 } 618 619 return TRUE; 620 } 621 622 /* We have to figure out the gp value, so that we can adjust the 623 symbol value correctly. We look up the symbol _gp in the output 624 BFD. If we can't find it, we're stuck. We cache it in the ELF 625 target data. We don't need to adjust the symbol value for an 626 external symbol if we are producing relocatable output. */ 627 628 static bfd_reloc_status_type 629 lm32_elf_final_gp (bfd *output_bfd, asymbol *symbol, bfd_boolean relocatable, 630 char **error_message, bfd_vma *pgp) 631 { 632 if (bfd_is_und_section (symbol->section) && !relocatable) 633 { 634 *pgp = 0; 635 return bfd_reloc_undefined; 636 } 637 638 *pgp = _bfd_get_gp_value (output_bfd); 639 if (*pgp == 0 && (!relocatable || (symbol->flags & BSF_SECTION_SYM) != 0)) 640 { 641 if (relocatable) 642 { 643 /* Make up a value. */ 644 *pgp = symbol->section->output_section->vma + 0x4000; 645 _bfd_set_gp_value (output_bfd, *pgp); 646 } 647 else if (!lm32_elf_assign_gp (output_bfd, pgp)) 648 { 649 *error_message = 650 (char *) 651 _("global pointer relative relocation when _gp not defined"); 652 return bfd_reloc_dangerous; 653 } 654 } 655 656 return bfd_reloc_ok; 657 } 658 659 static bfd_reloc_status_type 660 lm32_elf_do_gprel_relocate (bfd *abfd, 661 reloc_howto_type *howto, 662 asection *input_section ATTRIBUTE_UNUSED, 663 bfd_byte *data, 664 bfd_vma offset, 665 bfd_vma symbol_value, 666 bfd_vma addend) 667 { 668 return _bfd_final_link_relocate (howto, abfd, input_section, 669 data, offset, symbol_value, addend); 670 } 671 672 static bfd_reloc_status_type 673 lm32_elf_gprel_reloc (bfd *abfd, 674 arelent *reloc_entry, 675 asymbol *symbol, 676 void *data, 677 asection *input_section, 678 bfd *output_bfd, 679 char **msg) 680 { 681 bfd_vma relocation; 682 bfd_vma gp; 683 bfd_reloc_status_type r; 684 685 if (output_bfd != (bfd *) NULL 686 && (symbol->flags & BSF_SECTION_SYM) == 0 687 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) 688 { 689 reloc_entry->address += input_section->output_offset; 690 return bfd_reloc_ok; 691 } 692 693 if (output_bfd != NULL) 694 return bfd_reloc_ok; 695 696 relocation = symbol->value 697 + symbol->section->output_section->vma + symbol->section->output_offset; 698 699 if ((r = 700 lm32_elf_final_gp (abfd, symbol, FALSE, msg, &gp)) == bfd_reloc_ok) 701 { 702 relocation = relocation + reloc_entry->addend - gp; 703 reloc_entry->addend = 0; 704 if ((signed) relocation < -32768 || (signed) relocation > 32767) 705 { 706 *msg = _("global pointer relative address out of range"); 707 r = bfd_reloc_outofrange; 708 } 709 else 710 { 711 r = lm32_elf_do_gprel_relocate (abfd, reloc_entry->howto, 712 input_section, 713 data, reloc_entry->address, 714 relocation, reloc_entry->addend); 715 } 716 } 717 718 return r; 719 } 720 721 /* Find the segment number in which OSEC, and output section, is 722 located. */ 723 724 static unsigned 725 _lm32fdpic_osec_to_segment (bfd *output_bfd, asection *osec) 726 { 727 struct elf_segment_map *m; 728 Elf_Internal_Phdr *p; 729 730 /* Find the segment that contains the output_section. */ 731 for (m = elf_seg_map (output_bfd), p = elf_tdata (output_bfd)->phdr; 732 m != NULL; 733 m = m->next, p++) 734 { 735 int i; 736 737 for (i = m->count - 1; i >= 0; i--) 738 if (m->sections[i] == osec) 739 break; 740 741 if (i >= 0) 742 break; 743 } 744 745 return p - elf_tdata (output_bfd)->phdr; 746 } 747 748 /* Determine if an output section is read-only. */ 749 750 inline static bfd_boolean 751 _lm32fdpic_osec_readonly_p (bfd *output_bfd, asection *osec) 752 { 753 unsigned seg = _lm32fdpic_osec_to_segment (output_bfd, osec); 754 755 return ! (elf_tdata (output_bfd)->phdr[seg].p_flags & PF_W); 756 } 757 758 /* Relocate a section */ 759 760 static bfd_boolean 761 lm32_elf_relocate_section (bfd *output_bfd, 762 struct bfd_link_info *info, 763 bfd *input_bfd, 764 asection *input_section, 765 bfd_byte *contents, 766 Elf_Internal_Rela *relocs, 767 Elf_Internal_Sym *local_syms, 768 asection **local_sections) 769 { 770 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; 771 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd); 772 Elf_Internal_Rela *rel, *relend; 773 struct elf_lm32_link_hash_table *htab = lm32_elf_hash_table (info); 774 bfd_vma *local_got_offsets; 775 asection *sgot; 776 777 if (htab == NULL) 778 return FALSE; 779 780 local_got_offsets = elf_local_got_offsets (input_bfd); 781 782 sgot = htab->root.sgot; 783 784 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; 785 sym_hashes = elf_sym_hashes (input_bfd); 786 787 rel = relocs; 788 relend = relocs + input_section->reloc_count; 789 for (; rel < relend; rel++) 790 { 791 reloc_howto_type *howto; 792 unsigned int r_type; 793 unsigned long r_symndx; 794 Elf_Internal_Sym *sym; 795 asection *sec; 796 struct elf_link_hash_entry *h; 797 bfd_vma relocation; 798 bfd_vma gp; 799 bfd_reloc_status_type r; 800 const char *name = NULL; 801 802 r_symndx = ELF32_R_SYM (rel->r_info); 803 r_type = ELF32_R_TYPE (rel->r_info); 804 805 if (r_type == R_LM32_GNU_VTENTRY 806 || r_type == R_LM32_GNU_VTINHERIT ) 807 continue; 808 809 h = NULL; 810 sym = NULL; 811 sec = NULL; 812 813 howto = lm32_elf_howto_table + r_type; 814 815 if (r_symndx < symtab_hdr->sh_info) 816 { 817 /* It's a local symbol. */ 818 sym = local_syms + r_symndx; 819 sec = local_sections[r_symndx]; 820 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 821 name = bfd_elf_string_from_elf_section 822 (input_bfd, symtab_hdr->sh_link, sym->st_name); 823 name = name == NULL ? bfd_section_name (sec) : name; 824 } 825 else 826 { 827 /* It's a global symbol. */ 828 bfd_boolean unresolved_reloc; 829 bfd_boolean warned, ignored; 830 831 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 832 r_symndx, symtab_hdr, sym_hashes, 833 h, sec, relocation, 834 unresolved_reloc, warned, ignored); 835 name = h->root.root.string; 836 } 837 838 if (sec != NULL && discarded_section (sec)) 839 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, 840 rel, 1, relend, howto, 0, contents); 841 842 if (bfd_link_relocatable (info)) 843 { 844 /* This is a relocatable link. We don't have to change 845 anything, unless the reloc is against a section symbol, 846 in which case we have to adjust according to where the 847 section symbol winds up in the output section. */ 848 if (sym == NULL || ELF_ST_TYPE (sym->st_info) != STT_SECTION) 849 continue; 850 851 /* If partial_inplace, we need to store any additional addend 852 back in the section. */ 853 if (! howto->partial_inplace) 854 continue; 855 856 /* Shouldn't reach here. */ 857 abort (); 858 r = bfd_reloc_ok; 859 } 860 else 861 { 862 switch (howto->type) 863 { 864 case R_LM32_GPREL16: 865 if (!lm32_elf_assign_gp (output_bfd, &gp)) 866 r = bfd_reloc_dangerous; 867 else 868 { 869 relocation = relocation + rel->r_addend - gp; 870 rel->r_addend = 0; 871 if ((signed)relocation < -32768 || (signed)relocation > 32767) 872 r = bfd_reloc_outofrange; 873 else 874 { 875 r = _bfd_final_link_relocate (howto, input_bfd, 876 input_section, contents, 877 rel->r_offset, relocation, 878 rel->r_addend); 879 } 880 } 881 break; 882 case R_LM32_16_GOT: 883 /* Relocation is to the entry for this symbol in the global 884 offset table. */ 885 BFD_ASSERT (sgot != NULL); 886 if (h != NULL) 887 { 888 bfd_boolean dyn; 889 bfd_vma off; 890 891 off = h->got.offset; 892 BFD_ASSERT (off != (bfd_vma) -1); 893 894 dyn = htab->root.dynamic_sections_created; 895 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 896 bfd_link_pic (info), 897 h) 898 || (bfd_link_pic (info) 899 && (info->symbolic 900 || h->dynindx == -1 901 || h->forced_local) 902 && h->def_regular)) 903 { 904 /* This is actually a static link, or it is a 905 -Bsymbolic link and the symbol is defined 906 locally, or the symbol was forced to be local 907 because of a version file. We must initialize 908 this entry in the global offset table. Since the 909 offset must always be a multiple of 4, we use the 910 least significant bit to record whether we have 911 initialized it already. 912 913 When doing a dynamic link, we create a .rela.got 914 relocation entry to initialize the value. This 915 is done in the finish_dynamic_symbol routine. */ 916 if ((off & 1) != 0) 917 off &= ~1; 918 else 919 { 920 /* Write entry in GOT */ 921 bfd_put_32 (output_bfd, relocation, 922 sgot->contents + off); 923 /* Create entry in .rofixup pointing to GOT entry. */ 924 if (IS_FDPIC (output_bfd) && h->root.type != bfd_link_hash_undefweak) 925 { 926 _lm32fdpic_add_rofixup (output_bfd, 927 lm32fdpic_fixup32_section 928 (info), 929 sgot->output_section->vma 930 + sgot->output_offset 931 + off); 932 } 933 /* Mark GOT entry as having been written. */ 934 h->got.offset |= 1; 935 } 936 } 937 938 relocation = sgot->output_offset + off; 939 } 940 else 941 { 942 bfd_vma off; 943 bfd_byte *loc; 944 945 BFD_ASSERT (local_got_offsets != NULL 946 && local_got_offsets[r_symndx] != (bfd_vma) -1); 947 948 /* Get offset into GOT table. */ 949 off = local_got_offsets[r_symndx]; 950 951 /* The offset must always be a multiple of 4. We use 952 the least significant bit to record whether we have 953 already processed this entry. */ 954 if ((off & 1) != 0) 955 off &= ~1; 956 else 957 { 958 /* Write entry in GOT. */ 959 bfd_put_32 (output_bfd, relocation, sgot->contents + off); 960 /* Create entry in .rofixup pointing to GOT entry. */ 961 if (IS_FDPIC (output_bfd)) 962 { 963 _lm32fdpic_add_rofixup (output_bfd, 964 lm32fdpic_fixup32_section 965 (info), 966 sgot->output_section->vma 967 + sgot->output_offset 968 + off); 969 } 970 971 if (bfd_link_pic (info)) 972 { 973 asection *srelgot; 974 Elf_Internal_Rela outrel; 975 976 /* We need to generate a R_LM32_RELATIVE reloc 977 for the dynamic linker. */ 978 srelgot = htab->root.srelgot; 979 BFD_ASSERT (srelgot != NULL); 980 981 outrel.r_offset = (sgot->output_section->vma 982 + sgot->output_offset 983 + off); 984 outrel.r_info = ELF32_R_INFO (0, R_LM32_RELATIVE); 985 outrel.r_addend = relocation; 986 loc = srelgot->contents; 987 loc += srelgot->reloc_count * sizeof (Elf32_External_Rela); 988 bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc); 989 ++srelgot->reloc_count; 990 } 991 992 local_got_offsets[r_symndx] |= 1; 993 } 994 995 996 relocation = sgot->output_offset + off; 997 } 998 999 /* Addend should be zero. */ 1000 if (rel->r_addend != 0) 1001 _bfd_error_handler 1002 (_("internal error: addend should be zero for %s"), 1003 "R_LM32_16_GOT"); 1004 1005 r = _bfd_final_link_relocate (howto, 1006 input_bfd, 1007 input_section, 1008 contents, 1009 rel->r_offset, 1010 relocation, 1011 rel->r_addend); 1012 break; 1013 1014 case R_LM32_GOTOFF_LO16: 1015 case R_LM32_GOTOFF_HI16: 1016 /* Relocation is offset from GOT. */ 1017 BFD_ASSERT (sgot != NULL); 1018 relocation -= sgot->output_section->vma; 1019 /* Account for sign-extension. */ 1020 if ((r_type == R_LM32_GOTOFF_HI16) 1021 && ((relocation + rel->r_addend) & 0x8000)) 1022 rel->r_addend += 0x10000; 1023 r = _bfd_final_link_relocate (howto, 1024 input_bfd, 1025 input_section, 1026 contents, 1027 rel->r_offset, 1028 relocation, 1029 rel->r_addend); 1030 break; 1031 1032 case R_LM32_32: 1033 if (IS_FDPIC (output_bfd)) 1034 { 1035 if ((!h) || (h && h->root.type != bfd_link_hash_undefweak)) 1036 { 1037 /* Only create .rofixup entries for relocs in loadable sections. */ 1038 if ((bfd_section_flags (input_section->output_section) 1039 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD)) 1040 1041 { 1042 /* Check address to be modified is writable. */ 1043 if (_lm32fdpic_osec_readonly_p (output_bfd, 1044 input_section 1045 ->output_section)) 1046 { 1047 info->callbacks->warning 1048 (info, 1049 _("cannot emit dynamic relocations in read-only section"), 1050 name, input_bfd, input_section, rel->r_offset); 1051 return FALSE; 1052 } 1053 /* Create entry in .rofixup section. */ 1054 _lm32fdpic_add_rofixup (output_bfd, 1055 lm32fdpic_fixup32_section (info), 1056 input_section->output_section->vma 1057 + input_section->output_offset 1058 + rel->r_offset); 1059 } 1060 } 1061 } 1062 /* Fall through. */ 1063 1064 default: 1065 r = _bfd_final_link_relocate (howto, 1066 input_bfd, 1067 input_section, 1068 contents, 1069 rel->r_offset, 1070 relocation, 1071 rel->r_addend); 1072 break; 1073 } 1074 } 1075 1076 if (r != bfd_reloc_ok) 1077 { 1078 const char *msg = NULL; 1079 arelent bfd_reloc; 1080 1081 if (! lm32_info_to_howto_rela (input_bfd, &bfd_reloc, rel)) 1082 continue; 1083 howto = bfd_reloc.howto; 1084 1085 if (h != NULL) 1086 name = h->root.root.string; 1087 else 1088 { 1089 name = (bfd_elf_string_from_elf_section 1090 (input_bfd, symtab_hdr->sh_link, sym->st_name)); 1091 if (name == NULL || *name == '\0') 1092 name = bfd_section_name (sec); 1093 } 1094 1095 switch (r) 1096 { 1097 case bfd_reloc_overflow: 1098 if ((h != NULL) 1099 && (h->root.type == bfd_link_hash_undefweak)) 1100 break; 1101 (*info->callbacks->reloc_overflow) 1102 (info, (h ? &h->root : NULL), name, howto->name, 1103 (bfd_vma) 0, input_bfd, input_section, rel->r_offset); 1104 break; 1105 1106 case bfd_reloc_undefined: 1107 (*info->callbacks->undefined_symbol) 1108 (info, name, input_bfd, input_section, rel->r_offset, TRUE); 1109 break; 1110 1111 case bfd_reloc_outofrange: 1112 msg = _("internal error: out of range error"); 1113 goto common_error; 1114 1115 case bfd_reloc_notsupported: 1116 msg = _("internal error: unsupported relocation error"); 1117 goto common_error; 1118 1119 case bfd_reloc_dangerous: 1120 msg = _("internal error: dangerous error"); 1121 goto common_error; 1122 1123 default: 1124 msg = _("internal error: unknown error"); 1125 /* fall through */ 1126 1127 common_error: 1128 (*info->callbacks->warning) (info, msg, name, input_bfd, 1129 input_section, rel->r_offset); 1130 break; 1131 } 1132 } 1133 } 1134 1135 return TRUE; 1136 } 1137 1138 static asection * 1139 lm32_elf_gc_mark_hook (asection *sec, 1140 struct bfd_link_info *info, 1141 Elf_Internal_Rela *rel, 1142 struct elf_link_hash_entry *h, 1143 Elf_Internal_Sym *sym) 1144 { 1145 if (h != NULL) 1146 switch (ELF32_R_TYPE (rel->r_info)) 1147 { 1148 case R_LM32_GNU_VTINHERIT: 1149 case R_LM32_GNU_VTENTRY: 1150 return NULL; 1151 } 1152 1153 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 1154 } 1155 1156 /* Look through the relocs for a section during the first phase. */ 1157 1158 static bfd_boolean 1159 lm32_elf_check_relocs (bfd *abfd, 1160 struct bfd_link_info *info, 1161 asection *sec, 1162 const Elf_Internal_Rela *relocs) 1163 { 1164 Elf_Internal_Shdr *symtab_hdr; 1165 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; 1166 const Elf_Internal_Rela *rel; 1167 const Elf_Internal_Rela *rel_end; 1168 struct elf_lm32_link_hash_table *htab; 1169 bfd *dynobj; 1170 1171 if (bfd_link_relocatable (info)) 1172 return TRUE; 1173 1174 /* Don't do anything special with non-loaded, non-alloced sections. 1175 In particular, any relocs in such sections should not affect GOT 1176 and PLT reference counting (ie. we don't allow them to create GOT 1177 or PLT entries), there's no possibility or desire to optimize TLS 1178 relocs, and there's not much point in propagating relocs to shared 1179 libs that the dynamic linker won't relocate. */ 1180 if ((sec->flags & SEC_ALLOC) == 0) 1181 return TRUE; 1182 1183 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 1184 sym_hashes = elf_sym_hashes (abfd); 1185 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym); 1186 if (!elf_bad_symtab (abfd)) 1187 sym_hashes_end -= symtab_hdr->sh_info; 1188 1189 htab = lm32_elf_hash_table (info); 1190 if (htab == NULL) 1191 return FALSE; 1192 1193 dynobj = htab->root.dynobj; 1194 1195 rel_end = relocs + sec->reloc_count; 1196 for (rel = relocs; rel < rel_end; rel++) 1197 { 1198 int r_type; 1199 struct elf_link_hash_entry *h; 1200 unsigned long r_symndx; 1201 1202 r_symndx = ELF32_R_SYM (rel->r_info); 1203 r_type = ELF32_R_TYPE (rel->r_info); 1204 if (r_symndx < symtab_hdr->sh_info) 1205 h = NULL; 1206 else 1207 { 1208 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 1209 while (h->root.type == bfd_link_hash_indirect 1210 || h->root.type == bfd_link_hash_warning) 1211 h = (struct elf_link_hash_entry *) h->root.u.i.link; 1212 } 1213 1214 /* Some relocs require a global offset table. */ 1215 if (htab->root.sgot == NULL) 1216 { 1217 switch (r_type) 1218 { 1219 case R_LM32_16_GOT: 1220 case R_LM32_GOTOFF_HI16: 1221 case R_LM32_GOTOFF_LO16: 1222 if (dynobj == NULL) 1223 htab->root.dynobj = dynobj = abfd; 1224 if (!_bfd_elf_create_got_section (dynobj, info)) 1225 return FALSE; 1226 break; 1227 } 1228 } 1229 1230 /* Some relocs require a rofixup table. */ 1231 if (IS_FDPIC (abfd)) 1232 { 1233 switch (r_type) 1234 { 1235 case R_LM32_32: 1236 /* FDPIC requires a GOT if there is a .rofixup section 1237 (Normal ELF doesn't). */ 1238 if (dynobj == NULL) 1239 htab->root.dynobj = dynobj = abfd; 1240 if (!_bfd_elf_create_got_section (dynobj, info)) 1241 return FALSE; 1242 /* Create .rofixup section */ 1243 if (htab->sfixup32 == NULL) 1244 { 1245 if (! create_rofixup_section (dynobj, info)) 1246 return FALSE; 1247 } 1248 break; 1249 case R_LM32_16_GOT: 1250 case R_LM32_GOTOFF_HI16: 1251 case R_LM32_GOTOFF_LO16: 1252 /* Create .rofixup section. */ 1253 if (htab->sfixup32 == NULL) 1254 { 1255 if (dynobj == NULL) 1256 htab->root.dynobj = dynobj = abfd; 1257 if (! create_rofixup_section (dynobj, info)) 1258 return FALSE; 1259 } 1260 break; 1261 } 1262 } 1263 1264 switch (r_type) 1265 { 1266 case R_LM32_16_GOT: 1267 if (h != NULL) 1268 h->got.refcount += 1; 1269 else 1270 { 1271 bfd_signed_vma *local_got_refcounts; 1272 1273 /* This is a global offset table entry for a local symbol. */ 1274 local_got_refcounts = elf_local_got_refcounts (abfd); 1275 if (local_got_refcounts == NULL) 1276 { 1277 bfd_size_type size; 1278 1279 size = symtab_hdr->sh_info; 1280 size *= sizeof (bfd_signed_vma); 1281 local_got_refcounts = bfd_zalloc (abfd, size); 1282 if (local_got_refcounts == NULL) 1283 return FALSE; 1284 elf_local_got_refcounts (abfd) = local_got_refcounts; 1285 } 1286 local_got_refcounts[r_symndx] += 1; 1287 } 1288 break; 1289 1290 /* This relocation describes the C++ object vtable hierarchy. 1291 Reconstruct it for later use during GC. */ 1292 case R_LM32_GNU_VTINHERIT: 1293 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 1294 return FALSE; 1295 break; 1296 1297 /* This relocation describes which C++ vtable entries are actually 1298 used. Record for later use during GC. */ 1299 case R_LM32_GNU_VTENTRY: 1300 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 1301 return FALSE; 1302 break; 1303 1304 } 1305 } 1306 1307 return TRUE; 1308 } 1309 1310 /* Finish up the dynamic sections. */ 1311 1312 static bfd_boolean 1313 lm32_elf_finish_dynamic_sections (bfd *output_bfd, 1314 struct bfd_link_info *info) 1315 { 1316 struct elf_lm32_link_hash_table *htab; 1317 bfd *dynobj; 1318 asection *sdyn; 1319 asection *sgot; 1320 1321 htab = lm32_elf_hash_table (info); 1322 if (htab == NULL) 1323 return FALSE; 1324 1325 dynobj = htab->root.dynobj; 1326 1327 sgot = htab->root.sgotplt; 1328 sdyn = bfd_get_linker_section (dynobj, ".dynamic"); 1329 1330 if (htab->root.dynamic_sections_created) 1331 { 1332 asection *splt; 1333 Elf32_External_Dyn *dyncon, *dynconend; 1334 1335 BFD_ASSERT (sgot != NULL && sdyn != NULL); 1336 1337 dyncon = (Elf32_External_Dyn *) sdyn->contents; 1338 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); 1339 1340 for (; dyncon < dynconend; dyncon++) 1341 { 1342 Elf_Internal_Dyn dyn; 1343 asection *s; 1344 1345 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); 1346 1347 switch (dyn.d_tag) 1348 { 1349 default: 1350 break; 1351 1352 case DT_PLTGOT: 1353 s = htab->root.sgotplt; 1354 goto get_vma; 1355 case DT_JMPREL: 1356 s = htab->root.srelplt; 1357 get_vma: 1358 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 1359 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 1360 break; 1361 1362 case DT_PLTRELSZ: 1363 s = htab->root.srelplt; 1364 dyn.d_un.d_val = s->size; 1365 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 1366 break; 1367 } 1368 } 1369 1370 /* Fill in the first entry in the procedure linkage table. */ 1371 splt = htab->root.splt; 1372 if (splt && splt->size > 0) 1373 { 1374 if (bfd_link_pic (info)) 1375 { 1376 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD0, splt->contents); 1377 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD1, splt->contents + 4); 1378 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD2, splt->contents + 8); 1379 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD3, splt->contents + 12); 1380 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD4, splt->contents + 16); 1381 } 1382 else 1383 { 1384 unsigned long addr; 1385 /* addr = .got + 4 */ 1386 addr = sgot->output_section->vma + sgot->output_offset + 4; 1387 bfd_put_32 (output_bfd, 1388 PLT0_ENTRY_WORD0 | ((addr >> 16) & 0xffff), 1389 splt->contents); 1390 bfd_put_32 (output_bfd, 1391 PLT0_ENTRY_WORD1 | (addr & 0xffff), 1392 splt->contents + 4); 1393 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD2, splt->contents + 8); 1394 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD3, splt->contents + 12); 1395 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD4, splt->contents + 16); 1396 } 1397 1398 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 1399 PLT_ENTRY_SIZE; 1400 } 1401 } 1402 1403 /* Fill in the first three entries in the global offset table. */ 1404 if (sgot && sgot->size > 0) 1405 { 1406 if (sdyn == NULL) 1407 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); 1408 else 1409 bfd_put_32 (output_bfd, 1410 sdyn->output_section->vma + sdyn->output_offset, 1411 sgot->contents); 1412 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); 1413 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); 1414 1415 /* FIXME: This can be null if create_dynamic_sections wasn't called. */ 1416 if (elf_section_data (sgot->output_section) != NULL) 1417 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; 1418 } 1419 1420 if (lm32fdpic_fixup32_section (info)) 1421 { 1422 struct elf_link_hash_entry *hgot = elf_hash_table (info)->hgot; 1423 bfd_vma got_value = hgot->root.u.def.value 1424 + hgot->root.u.def.section->output_section->vma 1425 + hgot->root.u.def.section->output_offset; 1426 struct bfd_link_hash_entry *hend; 1427 1428 /* Last entry is pointer to GOT. */ 1429 _lm32fdpic_add_rofixup (output_bfd, lm32fdpic_fixup32_section (info), got_value); 1430 1431 /* Check we wrote enough entries. */ 1432 if (lm32fdpic_fixup32_section (info)->size 1433 != (lm32fdpic_fixup32_section (info)->reloc_count * 4)) 1434 { 1435 _bfd_error_handler 1436 ("LINKER BUG: .rofixup section size mismatch: size/4 %" PRId64 1437 " != relocs %d", 1438 (int64_t) (lm32fdpic_fixup32_section (info)->size / 4), 1439 lm32fdpic_fixup32_section (info)->reloc_count); 1440 return FALSE; 1441 } 1442 1443 hend = bfd_link_hash_lookup (info->hash, "__ROFIXUP_END__", 1444 FALSE, FALSE, TRUE); 1445 if (hend 1446 && (hend->type == bfd_link_hash_defined 1447 || hend->type == bfd_link_hash_defweak) 1448 && hend->u.def.section->output_section != NULL) 1449 { 1450 bfd_vma value = 1451 lm32fdpic_fixup32_section (info)->output_section->vma 1452 + lm32fdpic_fixup32_section (info)->output_offset 1453 + lm32fdpic_fixup32_section (info)->size 1454 - hend->u.def.section->output_section->vma 1455 - hend->u.def.section->output_offset; 1456 BFD_ASSERT (hend->u.def.value == value); 1457 if (hend->u.def.value != value) 1458 { 1459 _bfd_error_handler 1460 ("LINKER BUG: .rofixup section hend->u.def.value != value: %" 1461 PRId64 " != %" PRId64, 1462 (int64_t) hend->u.def.value, (int64_t) value); 1463 return FALSE; 1464 } 1465 } 1466 } 1467 1468 return TRUE; 1469 } 1470 1471 /* Finish up dynamic symbol handling. We set the contents of various 1472 dynamic sections here. */ 1473 1474 static bfd_boolean 1475 lm32_elf_finish_dynamic_symbol (bfd *output_bfd, 1476 struct bfd_link_info *info, 1477 struct elf_link_hash_entry *h, 1478 Elf_Internal_Sym *sym) 1479 { 1480 struct elf_lm32_link_hash_table *htab; 1481 bfd_byte *loc; 1482 1483 htab = lm32_elf_hash_table (info); 1484 if (htab == NULL) 1485 return FALSE; 1486 1487 if (h->plt.offset != (bfd_vma) -1) 1488 { 1489 asection *splt; 1490 asection *sgot; 1491 asection *srela; 1492 1493 bfd_vma plt_index; 1494 bfd_vma got_offset; 1495 Elf_Internal_Rela rela; 1496 1497 /* This symbol has an entry in the procedure linkage table. Set 1498 it up. */ 1499 BFD_ASSERT (h->dynindx != -1); 1500 1501 splt = htab->root.splt; 1502 sgot = htab->root.sgotplt; 1503 srela = htab->root.srelplt; 1504 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL); 1505 1506 /* Get the index in the procedure linkage table which 1507 corresponds to this symbol. This is the index of this symbol 1508 in all the symbols for which we are making plt entries. The 1509 first entry in the procedure linkage table is reserved. */ 1510 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; 1511 1512 /* Get the offset into the .got table of the entry that 1513 corresponds to this function. Each .got entry is 4 bytes. 1514 The first three are reserved. */ 1515 got_offset = (plt_index + 3) * 4; 1516 1517 /* Fill in the entry in the procedure linkage table. */ 1518 if (! bfd_link_pic (info)) 1519 { 1520 /* TODO */ 1521 } 1522 else 1523 { 1524 /* TODO */ 1525 } 1526 1527 /* Fill in the entry in the global offset table. */ 1528 bfd_put_32 (output_bfd, 1529 (splt->output_section->vma 1530 + splt->output_offset 1531 + h->plt.offset 1532 + 12), /* same offset */ 1533 sgot->contents + got_offset); 1534 1535 /* Fill in the entry in the .rela.plt section. */ 1536 rela.r_offset = (sgot->output_section->vma 1537 + sgot->output_offset 1538 + got_offset); 1539 rela.r_info = ELF32_R_INFO (h->dynindx, R_LM32_JMP_SLOT); 1540 rela.r_addend = 0; 1541 loc = srela->contents; 1542 loc += plt_index * sizeof (Elf32_External_Rela); 1543 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 1544 1545 if (!h->def_regular) 1546 { 1547 /* Mark the symbol as undefined, rather than as defined in 1548 the .plt section. Leave the value alone. */ 1549 sym->st_shndx = SHN_UNDEF; 1550 } 1551 1552 } 1553 1554 if (h->got.offset != (bfd_vma) -1) 1555 { 1556 asection *sgot; 1557 asection *srela; 1558 Elf_Internal_Rela rela; 1559 1560 /* This symbol has an entry in the global offset table. Set it 1561 up. */ 1562 sgot = htab->root.sgot; 1563 srela = htab->root.srelgot; 1564 BFD_ASSERT (sgot != NULL && srela != NULL); 1565 1566 rela.r_offset = (sgot->output_section->vma 1567 + sgot->output_offset 1568 + (h->got.offset &~ 1)); 1569 1570 /* If this is a -Bsymbolic link, and the symbol is defined 1571 locally, we just want to emit a RELATIVE reloc. Likewise if 1572 the symbol was forced to be local because of a version file. 1573 The entry in the global offset table will already have been 1574 initialized in the relocate_section function. */ 1575 if (bfd_link_pic (info) 1576 && (info->symbolic 1577 || h->dynindx == -1 1578 || h->forced_local) 1579 && h->def_regular) 1580 { 1581 rela.r_info = ELF32_R_INFO (0, R_LM32_RELATIVE); 1582 rela.r_addend = (h->root.u.def.value 1583 + h->root.u.def.section->output_section->vma 1584 + h->root.u.def.section->output_offset); 1585 } 1586 else 1587 { 1588 BFD_ASSERT ((h->got.offset & 1) == 0); 1589 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset); 1590 rela.r_info = ELF32_R_INFO (h->dynindx, R_LM32_GLOB_DAT); 1591 rela.r_addend = 0; 1592 } 1593 1594 loc = srela->contents; 1595 loc += srela->reloc_count * sizeof (Elf32_External_Rela); 1596 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 1597 ++srela->reloc_count; 1598 } 1599 1600 if (h->needs_copy) 1601 { 1602 asection *s; 1603 Elf_Internal_Rela rela; 1604 1605 /* This symbols needs a copy reloc. Set it up. */ 1606 BFD_ASSERT (h->dynindx != -1 1607 && (h->root.type == bfd_link_hash_defined 1608 || h->root.type == bfd_link_hash_defweak)); 1609 1610 s = bfd_get_linker_section (htab->root.dynobj, ".rela.bss"); 1611 BFD_ASSERT (s != NULL); 1612 1613 rela.r_offset = (h->root.u.def.value 1614 + h->root.u.def.section->output_section->vma 1615 + h->root.u.def.section->output_offset); 1616 rela.r_info = ELF32_R_INFO (h->dynindx, R_LM32_COPY); 1617 rela.r_addend = 0; 1618 loc = s->contents; 1619 loc += s->reloc_count * sizeof (Elf32_External_Rela); 1620 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 1621 ++s->reloc_count; 1622 } 1623 1624 /* Mark some specially defined symbols as absolute. */ 1625 if (h == htab->root.hdynamic || h == htab->root.hgot) 1626 sym->st_shndx = SHN_ABS; 1627 1628 return TRUE; 1629 } 1630 1631 static enum elf_reloc_type_class 1632 lm32_elf_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, 1633 const asection *rel_sec ATTRIBUTE_UNUSED, 1634 const Elf_Internal_Rela *rela) 1635 { 1636 switch ((int) ELF32_R_TYPE (rela->r_info)) 1637 { 1638 case R_LM32_RELATIVE: return reloc_class_relative; 1639 case R_LM32_JMP_SLOT: return reloc_class_plt; 1640 case R_LM32_COPY: return reloc_class_copy; 1641 default: return reloc_class_normal; 1642 } 1643 } 1644 1645 /* Find dynamic relocs for H that apply to read-only sections. */ 1646 1647 static asection * 1648 readonly_dynrelocs (struct elf_link_hash_entry *h) 1649 { 1650 struct elf_dyn_relocs *p; 1651 struct elf_lm32_link_hash_entry *eh = (struct elf_lm32_link_hash_entry *) h; 1652 1653 for (p = eh->dyn_relocs; p != NULL; p = p->next) 1654 { 1655 asection *s = p->sec->output_section; 1656 1657 if (s != NULL && (s->flags & SEC_READONLY) != 0) 1658 return p->sec; 1659 } 1660 return NULL; 1661 } 1662 1663 /* Adjust a symbol defined by a dynamic object and referenced by a 1664 regular object. The current definition is in some section of the 1665 dynamic object, but we're not including those sections. We have to 1666 change the definition to something the rest of the link can 1667 understand. */ 1668 1669 static bfd_boolean 1670 lm32_elf_adjust_dynamic_symbol (struct bfd_link_info *info, 1671 struct elf_link_hash_entry *h) 1672 { 1673 struct elf_lm32_link_hash_table *htab; 1674 bfd *dynobj; 1675 asection *s; 1676 1677 dynobj = elf_hash_table (info)->dynobj; 1678 1679 /* Make sure we know what is going on here. */ 1680 BFD_ASSERT (dynobj != NULL 1681 && (h->needs_plt 1682 || h->is_weakalias 1683 || (h->def_dynamic 1684 && h->ref_regular 1685 && !h->def_regular))); 1686 1687 /* If this is a function, put it in the procedure linkage table. We 1688 will fill in the contents of the procedure linkage table later, 1689 when we know the address of the .got section. */ 1690 if (h->type == STT_FUNC 1691 || h->needs_plt) 1692 { 1693 if (! bfd_link_pic (info) 1694 && !h->def_dynamic 1695 && !h->ref_dynamic 1696 && h->root.type != bfd_link_hash_undefweak 1697 && h->root.type != bfd_link_hash_undefined) 1698 { 1699 /* This case can occur if we saw a PLT reloc in an input 1700 file, but the symbol was never referred to by a dynamic 1701 object. In such a case, we don't actually need to build 1702 a procedure linkage table, and we can just do a PCREL 1703 reloc instead. */ 1704 h->plt.offset = (bfd_vma) -1; 1705 h->needs_plt = 0; 1706 } 1707 1708 return TRUE; 1709 } 1710 else 1711 h->plt.offset = (bfd_vma) -1; 1712 1713 /* If this is a weak symbol, and there is a real definition, the 1714 processor independent code will have arranged for us to see the 1715 real definition first, and we can just use the same value. */ 1716 if (h->is_weakalias) 1717 { 1718 struct elf_link_hash_entry *def = weakdef (h); 1719 BFD_ASSERT (def->root.type == bfd_link_hash_defined); 1720 h->root.u.def.section = def->root.u.def.section; 1721 h->root.u.def.value = def->root.u.def.value; 1722 return TRUE; 1723 } 1724 1725 /* This is a reference to a symbol defined by a dynamic object which 1726 is not a function. */ 1727 1728 /* If we are creating a shared library, we must presume that the 1729 only references to the symbol are via the global offset table. 1730 For such cases we need not do anything here; the relocations will 1731 be handled correctly by relocate_section. */ 1732 if (bfd_link_pic (info)) 1733 return TRUE; 1734 1735 /* If there are no references to this symbol that do not use the 1736 GOT, we don't need to generate a copy reloc. */ 1737 if (!h->non_got_ref) 1738 return TRUE; 1739 1740 /* If -z nocopyreloc was given, we won't generate them either. */ 1741 if (0 && info->nocopyreloc) 1742 { 1743 h->non_got_ref = 0; 1744 return TRUE; 1745 } 1746 1747 /* If we don't find any dynamic relocs in read-only sections, then 1748 we'll be keeping the dynamic relocs and avoiding the copy reloc. */ 1749 if (0 && !readonly_dynrelocs (h)) 1750 { 1751 h->non_got_ref = 0; 1752 return TRUE; 1753 } 1754 1755 /* We must allocate the symbol in our .dynbss section, which will 1756 become part of the .bss section of the executable. There will be 1757 an entry for this symbol in the .dynsym section. The dynamic 1758 object will contain position independent code, so all references 1759 from the dynamic object to this symbol will go through the global 1760 offset table. The dynamic linker will use the .dynsym entry to 1761 determine the address it must put in the global offset table, so 1762 both the dynamic object and the regular object will refer to the 1763 same memory location for the variable. */ 1764 1765 htab = lm32_elf_hash_table (info); 1766 if (htab == NULL) 1767 return FALSE; 1768 1769 s = htab->sdynbss; 1770 BFD_ASSERT (s != NULL); 1771 1772 /* We must generate a R_LM32_COPY reloc to tell the dynamic linker 1773 to copy the initial value out of the dynamic object and into the 1774 runtime process image. We need to remember the offset into the 1775 .rela.bss section we are going to use. */ 1776 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) 1777 { 1778 asection *srel; 1779 1780 srel = htab->srelbss; 1781 BFD_ASSERT (srel != NULL); 1782 srel->size += sizeof (Elf32_External_Rela); 1783 h->needs_copy = 1; 1784 } 1785 1786 return _bfd_elf_adjust_dynamic_copy (info, h, s); 1787 } 1788 1789 /* Allocate space in .plt, .got and associated reloc sections for 1790 dynamic relocs. */ 1791 1792 static bfd_boolean 1793 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) 1794 { 1795 struct bfd_link_info *info; 1796 struct elf_lm32_link_hash_table *htab; 1797 struct elf_lm32_link_hash_entry *eh; 1798 struct elf_dyn_relocs *p; 1799 1800 if (h->root.type == bfd_link_hash_indirect) 1801 return TRUE; 1802 1803 info = (struct bfd_link_info *) inf; 1804 htab = lm32_elf_hash_table (info); 1805 if (htab == NULL) 1806 return FALSE; 1807 1808 eh = (struct elf_lm32_link_hash_entry *) h; 1809 1810 if (htab->root.dynamic_sections_created 1811 && h->plt.refcount > 0) 1812 { 1813 /* Make sure this symbol is output as a dynamic symbol. 1814 Undefined weak syms won't yet be marked as dynamic. */ 1815 if (h->dynindx == -1 1816 && !h->forced_local) 1817 { 1818 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1819 return FALSE; 1820 } 1821 1822 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), h)) 1823 { 1824 asection *s = htab->root.splt; 1825 1826 /* If this is the first .plt entry, make room for the special 1827 first entry. */ 1828 if (s->size == 0) 1829 s->size += PLT_ENTRY_SIZE; 1830 1831 h->plt.offset = s->size; 1832 1833 /* If this symbol is not defined in a regular file, and we are 1834 not generating a shared library, then set the symbol to this 1835 location in the .plt. This is required to make function 1836 pointers compare as equal between the normal executable and 1837 the shared library. */ 1838 if (! bfd_link_pic (info) 1839 && !h->def_regular) 1840 { 1841 h->root.u.def.section = s; 1842 h->root.u.def.value = h->plt.offset; 1843 } 1844 1845 /* Make room for this entry. */ 1846 s->size += PLT_ENTRY_SIZE; 1847 1848 /* We also need to make an entry in the .got.plt section, which 1849 will be placed in the .got section by the linker script. */ 1850 htab->root.sgotplt->size += 4; 1851 1852 /* We also need to make an entry in the .rel.plt section. */ 1853 htab->root.srelplt->size += sizeof (Elf32_External_Rela); 1854 } 1855 else 1856 { 1857 h->plt.offset = (bfd_vma) -1; 1858 h->needs_plt = 0; 1859 } 1860 } 1861 else 1862 { 1863 h->plt.offset = (bfd_vma) -1; 1864 h->needs_plt = 0; 1865 } 1866 1867 if (h->got.refcount > 0) 1868 { 1869 asection *s; 1870 bfd_boolean dyn; 1871 1872 /* Make sure this symbol is output as a dynamic symbol. 1873 Undefined weak syms won't yet be marked as dynamic. */ 1874 if (h->dynindx == -1 1875 && !h->forced_local) 1876 { 1877 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1878 return FALSE; 1879 } 1880 1881 s = htab->root.sgot; 1882 1883 h->got.offset = s->size; 1884 s->size += 4; 1885 dyn = htab->root.dynamic_sections_created; 1886 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h)) 1887 htab->root.srelgot->size += sizeof (Elf32_External_Rela); 1888 } 1889 else 1890 h->got.offset = (bfd_vma) -1; 1891 1892 if (eh->dyn_relocs == NULL) 1893 return TRUE; 1894 1895 /* In the shared -Bsymbolic case, discard space allocated for 1896 dynamic pc-relative relocs against symbols which turn out to be 1897 defined in regular objects. For the normal shared case, discard 1898 space for pc-relative relocs that have become local due to symbol 1899 visibility changes. */ 1900 1901 if (bfd_link_pic (info)) 1902 { 1903 if (h->def_regular 1904 && (h->forced_local 1905 || info->symbolic)) 1906 { 1907 struct elf_dyn_relocs **pp; 1908 1909 for (pp = &eh->dyn_relocs; (p = *pp) != NULL;) 1910 { 1911 p->count -= p->pc_count; 1912 p->pc_count = 0; 1913 if (p->count == 0) 1914 *pp = p->next; 1915 else 1916 pp = &p->next; 1917 } 1918 } 1919 1920 /* Also discard relocs on undefined weak syms with non-default 1921 visibility. */ 1922 if (eh->dyn_relocs != NULL 1923 && h->root.type == bfd_link_hash_undefweak) 1924 { 1925 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) 1926 eh->dyn_relocs = NULL; 1927 1928 /* Make sure undefined weak symbols are output as a dynamic 1929 symbol in PIEs. */ 1930 else if (h->dynindx == -1 1931 && !h->forced_local) 1932 { 1933 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1934 return FALSE; 1935 } 1936 } 1937 } 1938 else 1939 { 1940 /* For the non-shared case, discard space for relocs against 1941 symbols which turn out to need copy relocs or are not 1942 dynamic. */ 1943 1944 if (!h->non_got_ref 1945 && ((h->def_dynamic 1946 && !h->def_regular) 1947 || (htab->root.dynamic_sections_created 1948 && (h->root.type == bfd_link_hash_undefweak 1949 || h->root.type == bfd_link_hash_undefined)))) 1950 { 1951 /* Make sure this symbol is output as a dynamic symbol. 1952 Undefined weak syms won't yet be marked as dynamic. */ 1953 if (h->dynindx == -1 1954 && !h->forced_local) 1955 { 1956 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1957 return FALSE; 1958 } 1959 1960 /* If that succeeded, we know we'll be keeping all the 1961 relocs. */ 1962 if (h->dynindx != -1) 1963 goto keep; 1964 } 1965 1966 eh->dyn_relocs = NULL; 1967 1968 keep: ; 1969 } 1970 1971 /* Finally, allocate space. */ 1972 for (p = eh->dyn_relocs; p != NULL; p = p->next) 1973 { 1974 asection *sreloc = elf_section_data (p->sec)->sreloc; 1975 sreloc->size += p->count * sizeof (Elf32_External_Rela); 1976 } 1977 1978 return TRUE; 1979 } 1980 1981 /* Set DF_TEXTREL if we find any dynamic relocs that apply to 1982 read-only sections. */ 1983 1984 static bfd_boolean 1985 maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p) 1986 { 1987 asection *sec; 1988 1989 if (h->root.type == bfd_link_hash_indirect) 1990 return TRUE; 1991 1992 sec = readonly_dynrelocs (h); 1993 if (sec != NULL) 1994 { 1995 struct bfd_link_info *info = (struct bfd_link_info *) info_p; 1996 1997 info->flags |= DF_TEXTREL; 1998 info->callbacks->minfo 1999 (_("%pB: dynamic relocation against `%pT' in read-only section `%pA'\n"), 2000 sec->owner, h->root.root.string, sec); 2001 2002 /* Not an error, just cut short the traversal. */ 2003 return FALSE; 2004 } 2005 return TRUE; 2006 } 2007 2008 /* Set the sizes of the dynamic sections. */ 2009 2010 static bfd_boolean 2011 lm32_elf_size_dynamic_sections (bfd *output_bfd, 2012 struct bfd_link_info *info) 2013 { 2014 struct elf_lm32_link_hash_table *htab; 2015 bfd *dynobj; 2016 asection *s; 2017 bfd_boolean relocs; 2018 bfd *ibfd; 2019 2020 htab = lm32_elf_hash_table (info); 2021 if (htab == NULL) 2022 return FALSE; 2023 2024 dynobj = htab->root.dynobj; 2025 BFD_ASSERT (dynobj != NULL); 2026 2027 if (htab->root.dynamic_sections_created) 2028 { 2029 /* Set the contents of the .interp section to the interpreter. */ 2030 if (bfd_link_executable (info) && !info->nointerp) 2031 { 2032 s = bfd_get_linker_section (dynobj, ".interp"); 2033 BFD_ASSERT (s != NULL); 2034 s->size = sizeof ELF_DYNAMIC_INTERPRETER; 2035 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; 2036 } 2037 } 2038 2039 /* Set up .got offsets for local syms, and space for local dynamic 2040 relocs. */ 2041 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 2042 { 2043 bfd_signed_vma *local_got; 2044 bfd_signed_vma *end_local_got; 2045 bfd_size_type locsymcount; 2046 Elf_Internal_Shdr *symtab_hdr; 2047 asection *srel; 2048 2049 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) 2050 continue; 2051 2052 for (s = ibfd->sections; s != NULL; s = s->next) 2053 { 2054 struct elf_dyn_relocs *p; 2055 2056 for (p = ((struct elf_dyn_relocs *) 2057 elf_section_data (s)->local_dynrel); 2058 p != NULL; 2059 p = p->next) 2060 { 2061 if (! bfd_is_abs_section (p->sec) 2062 && bfd_is_abs_section (p->sec->output_section)) 2063 { 2064 /* Input section has been discarded, either because 2065 it is a copy of a linkonce section or due to 2066 linker script /DISCARD/, so we'll be discarding 2067 the relocs too. */ 2068 } 2069 else if (p->count != 0) 2070 { 2071 srel = elf_section_data (p->sec)->sreloc; 2072 srel->size += p->count * sizeof (Elf32_External_Rela); 2073 if ((p->sec->output_section->flags & SEC_READONLY) != 0) 2074 info->flags |= DF_TEXTREL; 2075 } 2076 } 2077 } 2078 2079 local_got = elf_local_got_refcounts (ibfd); 2080 if (!local_got) 2081 continue; 2082 2083 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; 2084 locsymcount = symtab_hdr->sh_info; 2085 end_local_got = local_got + locsymcount; 2086 s = htab->root.sgot; 2087 srel = htab->root.srelgot; 2088 for (; local_got < end_local_got; ++local_got) 2089 { 2090 if (*local_got > 0) 2091 { 2092 *local_got = s->size; 2093 s->size += 4; 2094 if (bfd_link_pic (info)) 2095 srel->size += sizeof (Elf32_External_Rela); 2096 } 2097 else 2098 *local_got = (bfd_vma) -1; 2099 } 2100 } 2101 2102 /* Allocate global sym .plt and .got entries, and space for global 2103 sym dynamic relocs. */ 2104 elf_link_hash_traverse (&htab->root, allocate_dynrelocs, info); 2105 2106 /* We now have determined the sizes of the various dynamic sections. 2107 Allocate memory for them. */ 2108 relocs = FALSE; 2109 for (s = dynobj->sections; s != NULL; s = s->next) 2110 { 2111 if ((s->flags & SEC_LINKER_CREATED) == 0) 2112 continue; 2113 2114 if (s == htab->root.splt 2115 || s == htab->root.sgot 2116 || s == htab->root.sgotplt 2117 || s == htab->sdynbss) 2118 { 2119 /* Strip this section if we don't need it; see the 2120 comment below. */ 2121 } 2122 else if (CONST_STRNEQ (bfd_section_name (s), ".rela")) 2123 { 2124 if (s->size != 0 && s != htab->root.srelplt) 2125 relocs = TRUE; 2126 2127 /* We use the reloc_count field as a counter if we need 2128 to copy relocs into the output file. */ 2129 s->reloc_count = 0; 2130 } 2131 else 2132 /* It's not one of our sections, so don't allocate space. */ 2133 continue; 2134 2135 if (s->size == 0) 2136 { 2137 /* If we don't need this section, strip it from the 2138 output file. This is mostly to handle .rela.bss and 2139 .rela.plt. We must create both sections in 2140 create_dynamic_sections, because they must be created 2141 before the linker maps input sections to output 2142 sections. The linker does that before 2143 adjust_dynamic_symbol is called, and it is that 2144 function which decides whether anything needs to go 2145 into these sections. */ 2146 s->flags |= SEC_EXCLUDE; 2147 continue; 2148 } 2149 2150 if ((s->flags & SEC_HAS_CONTENTS) == 0) 2151 continue; 2152 2153 /* Allocate memory for the section contents. We use bfd_zalloc 2154 here in case unused entries are not reclaimed before the 2155 section's contents are written out. This should not happen, 2156 but this way if it does, we get a R_LM32_NONE reloc instead 2157 of garbage. */ 2158 s->contents = bfd_zalloc (dynobj, s->size); 2159 if (s->contents == NULL) 2160 return FALSE; 2161 } 2162 2163 if (htab->root.dynamic_sections_created) 2164 { 2165 /* Add some entries to the .dynamic section. We fill in the 2166 values later, in lm32_elf_finish_dynamic_sections, but we 2167 must add the entries now so that we get the correct size for 2168 the .dynamic section. The DT_DEBUG entry is filled in by the 2169 dynamic linker and used by the debugger. */ 2170 #define add_dynamic_entry(TAG, VAL) \ 2171 _bfd_elf_add_dynamic_entry (info, TAG, VAL) 2172 2173 if (bfd_link_executable (info)) 2174 { 2175 if (! add_dynamic_entry (DT_DEBUG, 0)) 2176 return FALSE; 2177 } 2178 2179 if (htab->root.splt->size != 0) 2180 { 2181 if (! add_dynamic_entry (DT_PLTGOT, 0) 2182 || ! add_dynamic_entry (DT_PLTRELSZ, 0) 2183 || ! add_dynamic_entry (DT_PLTREL, DT_RELA) 2184 || ! add_dynamic_entry (DT_JMPREL, 0)) 2185 return FALSE; 2186 } 2187 2188 if (relocs) 2189 { 2190 if (! add_dynamic_entry (DT_RELA, 0) 2191 || ! add_dynamic_entry (DT_RELASZ, 0) 2192 || ! add_dynamic_entry (DT_RELAENT, 2193 sizeof (Elf32_External_Rela))) 2194 return FALSE; 2195 2196 /* If any dynamic relocs apply to a read-only section, 2197 then we need a DT_TEXTREL entry. */ 2198 if ((info->flags & DF_TEXTREL) == 0) 2199 elf_link_hash_traverse (&htab->root, maybe_set_textrel, info); 2200 2201 if ((info->flags & DF_TEXTREL) != 0) 2202 { 2203 if (! add_dynamic_entry (DT_TEXTREL, 0)) 2204 return FALSE; 2205 } 2206 } 2207 } 2208 #undef add_dynamic_entry 2209 2210 /* Allocate .rofixup section. */ 2211 if (IS_FDPIC (output_bfd)) 2212 { 2213 struct weak_symbol_list *list_start = NULL, *list_end = NULL; 2214 int rgot_weak_count = 0; 2215 int r32_count = 0; 2216 int rgot_count = 0; 2217 /* Look for deleted sections. */ 2218 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 2219 { 2220 for (s = ibfd->sections; s != NULL; s = s->next) 2221 { 2222 if (s->reloc_count) 2223 { 2224 /* Count relocs that need .rofixup entires. */ 2225 Elf_Internal_Rela *internal_relocs, *end; 2226 internal_relocs = elf_section_data (s)->relocs; 2227 if (internal_relocs == NULL) 2228 internal_relocs = (_bfd_elf_link_read_relocs (ibfd, s, NULL, NULL, FALSE)); 2229 if (internal_relocs != NULL) 2230 { 2231 end = internal_relocs + s->reloc_count; 2232 while (internal_relocs < end) 2233 { 2234 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; 2235 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd); 2236 unsigned long r_symndx; 2237 struct elf_link_hash_entry *h; 2238 2239 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; 2240 sym_hashes = elf_sym_hashes (ibfd); 2241 r_symndx = ELF32_R_SYM (internal_relocs->r_info); 2242 h = NULL; 2243 if (r_symndx < symtab_hdr->sh_info) 2244 { 2245 } 2246 else 2247 { 2248 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 2249 while (h->root.type == bfd_link_hash_indirect 2250 || h->root.type == bfd_link_hash_warning) 2251 h = (struct elf_link_hash_entry *) h->root.u.i.link; 2252 } 2253 2254 /* Don't generate entries for weak symbols. */ 2255 if (!h || (h && h->root.type != bfd_link_hash_undefweak)) 2256 { 2257 if (!discarded_section (s) && !((bfd_section_flags (s) & SEC_ALLOC) == 0)) 2258 { 2259 switch (ELF32_R_TYPE (internal_relocs->r_info)) 2260 { 2261 case R_LM32_32: 2262 r32_count++; 2263 break; 2264 case R_LM32_16_GOT: 2265 rgot_count++; 2266 break; 2267 } 2268 } 2269 } 2270 else 2271 { 2272 struct weak_symbol_list *current, *new_entry; 2273 /* Is this symbol already in the list? */ 2274 for (current = list_start; current; current = current->next) 2275 { 2276 if (!strcmp (current->name, h->root.root.string)) 2277 break; 2278 } 2279 if (!current && !discarded_section (s) && (bfd_section_flags (s) & SEC_ALLOC)) 2280 { 2281 /* Will this have an entry in the GOT. */ 2282 if (ELF32_R_TYPE (internal_relocs->r_info) == R_LM32_16_GOT) 2283 { 2284 /* Create a new entry. */ 2285 new_entry = malloc (sizeof (struct weak_symbol_list)); 2286 if (!new_entry) 2287 return FALSE; 2288 new_entry->name = h->root.root.string; 2289 new_entry->next = NULL; 2290 /* Add to list */ 2291 if (list_start == NULL) 2292 { 2293 list_start = new_entry; 2294 list_end = new_entry; 2295 } 2296 else 2297 { 2298 list_end->next = new_entry; 2299 list_end = new_entry; 2300 } 2301 /* Increase count of undefined weak symbols in the got. */ 2302 rgot_weak_count++; 2303 } 2304 } 2305 } 2306 internal_relocs++; 2307 } 2308 } 2309 else 2310 return FALSE; 2311 } 2312 } 2313 } 2314 /* Free list. */ 2315 while (list_start) 2316 { 2317 list_end = list_start->next; 2318 free (list_start); 2319 list_start = list_end; 2320 } 2321 2322 /* Size sections. */ 2323 lm32fdpic_fixup32_section (info)->size 2324 = (r32_count + (htab->root.sgot->size / 4) - rgot_weak_count + 1) * 4; 2325 if (lm32fdpic_fixup32_section (info)->size == 0) 2326 lm32fdpic_fixup32_section (info)->flags |= SEC_EXCLUDE; 2327 else 2328 { 2329 lm32fdpic_fixup32_section (info)->contents = 2330 bfd_zalloc (dynobj, lm32fdpic_fixup32_section (info)->size); 2331 if (lm32fdpic_fixup32_section (info)->contents == NULL) 2332 return FALSE; 2333 } 2334 } 2335 2336 return TRUE; 2337 } 2338 2339 /* Create dynamic sections when linking against a dynamic object. */ 2340 2341 static bfd_boolean 2342 lm32_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) 2343 { 2344 struct elf_lm32_link_hash_table *htab; 2345 flagword flags, pltflags; 2346 asection *s; 2347 const struct elf_backend_data *bed = get_elf_backend_data (abfd); 2348 int ptralign = 2; /* 32bit */ 2349 2350 htab = lm32_elf_hash_table (info); 2351 if (htab == NULL) 2352 return FALSE; 2353 2354 /* Make sure we have a GOT - For the case where we have a dynamic object 2355 but none of the relocs in check_relocs */ 2356 if (!_bfd_elf_create_got_section (abfd, info)) 2357 return FALSE; 2358 if (IS_FDPIC (abfd) && (htab->sfixup32 == NULL)) 2359 { 2360 if (! create_rofixup_section (abfd, info)) 2361 return FALSE; 2362 } 2363 2364 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and 2365 .rel[a].bss sections. */ 2366 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY 2367 | SEC_LINKER_CREATED); 2368 2369 pltflags = flags; 2370 pltflags |= SEC_CODE; 2371 if (bed->plt_not_loaded) 2372 pltflags &= ~ (SEC_LOAD | SEC_HAS_CONTENTS); 2373 if (bed->plt_readonly) 2374 pltflags |= SEC_READONLY; 2375 2376 s = bfd_make_section_anyway_with_flags (abfd, ".plt", pltflags); 2377 htab->root.splt = s; 2378 if (s == NULL 2379 || !bfd_set_section_alignment (s, bed->plt_alignment)) 2380 return FALSE; 2381 2382 if (bed->want_plt_sym) 2383 { 2384 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the 2385 .plt section. */ 2386 struct bfd_link_hash_entry *bh = NULL; 2387 struct elf_link_hash_entry *h; 2388 2389 if (! (_bfd_generic_link_add_one_symbol 2390 (info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s, 2391 (bfd_vma) 0, NULL, FALSE, 2392 get_elf_backend_data (abfd)->collect, &bh))) 2393 return FALSE; 2394 h = (struct elf_link_hash_entry *) bh; 2395 h->def_regular = 1; 2396 h->type = STT_OBJECT; 2397 htab->root.hplt = h; 2398 2399 if (bfd_link_pic (info) 2400 && ! bfd_elf_link_record_dynamic_symbol (info, h)) 2401 return FALSE; 2402 } 2403 2404 s = bfd_make_section_anyway_with_flags (abfd, 2405 bed->default_use_rela_p 2406 ? ".rela.plt" : ".rel.plt", 2407 flags | SEC_READONLY); 2408 htab->root.srelplt = s; 2409 if (s == NULL 2410 || !bfd_set_section_alignment (s, ptralign)) 2411 return FALSE; 2412 2413 if (htab->root.sgot == NULL 2414 && !_bfd_elf_create_got_section (abfd, info)) 2415 return FALSE; 2416 2417 if (bed->want_dynbss) 2418 { 2419 /* The .dynbss section is a place to put symbols which are defined 2420 by dynamic objects, are referenced by regular objects, and are 2421 not functions. We must allocate space for them in the process 2422 image and use a R_*_COPY reloc to tell the dynamic linker to 2423 initialize them at run time. The linker script puts the .dynbss 2424 section into the .bss section of the final image. */ 2425 s = bfd_make_section_anyway_with_flags (abfd, ".dynbss", 2426 SEC_ALLOC | SEC_LINKER_CREATED); 2427 htab->sdynbss = s; 2428 if (s == NULL) 2429 return FALSE; 2430 /* The .rel[a].bss section holds copy relocs. This section is not 2431 normally needed. We need to create it here, though, so that the 2432 linker will map it to an output section. We can't just create it 2433 only if we need it, because we will not know whether we need it 2434 until we have seen all the input files, and the first time the 2435 main linker code calls BFD after examining all the input files 2436 (size_dynamic_sections) the input sections have already been 2437 mapped to the output sections. If the section turns out not to 2438 be needed, we can discard it later. We will never need this 2439 section when generating a shared object, since they do not use 2440 copy relocs. */ 2441 if (! bfd_link_pic (info)) 2442 { 2443 s = bfd_make_section_anyway_with_flags (abfd, 2444 (bed->default_use_rela_p 2445 ? ".rela.bss" : ".rel.bss"), 2446 flags | SEC_READONLY); 2447 htab->srelbss = s; 2448 if (s == NULL 2449 || !bfd_set_section_alignment (s, ptralign)) 2450 return FALSE; 2451 } 2452 } 2453 2454 return TRUE; 2455 } 2456 2457 /* Copy the extra info we tack onto an elf_link_hash_entry. */ 2458 2459 static void 2460 lm32_elf_copy_indirect_symbol (struct bfd_link_info *info, 2461 struct elf_link_hash_entry *dir, 2462 struct elf_link_hash_entry *ind) 2463 { 2464 struct elf_lm32_link_hash_entry * edir; 2465 struct elf_lm32_link_hash_entry * eind; 2466 2467 edir = (struct elf_lm32_link_hash_entry *) dir; 2468 eind = (struct elf_lm32_link_hash_entry *) ind; 2469 2470 if (eind->dyn_relocs != NULL) 2471 { 2472 if (edir->dyn_relocs != NULL) 2473 { 2474 struct elf_dyn_relocs **pp; 2475 struct elf_dyn_relocs *p; 2476 2477 /* Add reloc counts against the indirect sym to the direct sym 2478 list. Merge any entries against the same section. */ 2479 for (pp = &eind->dyn_relocs; (p = *pp) != NULL;) 2480 { 2481 struct elf_dyn_relocs *q; 2482 2483 for (q = edir->dyn_relocs; q != NULL; q = q->next) 2484 if (q->sec == p->sec) 2485 { 2486 q->pc_count += p->pc_count; 2487 q->count += p->count; 2488 *pp = p->next; 2489 break; 2490 } 2491 if (q == NULL) 2492 pp = &p->next; 2493 } 2494 *pp = edir->dyn_relocs; 2495 } 2496 2497 edir->dyn_relocs = eind->dyn_relocs; 2498 eind->dyn_relocs = NULL; 2499 } 2500 2501 _bfd_elf_link_hash_copy_indirect (info, dir, ind); 2502 } 2503 2504 static bfd_boolean 2505 lm32_elf_always_size_sections (bfd *output_bfd, struct bfd_link_info *info) 2506 { 2507 if (!bfd_link_relocatable (info)) 2508 { 2509 if (!bfd_elf_stack_segment_size (output_bfd, info, 2510 "__stacksize", DEFAULT_STACK_SIZE)) 2511 return FALSE; 2512 2513 asection *sec = bfd_get_section_by_name (output_bfd, ".stack"); 2514 if (sec) 2515 sec->size = info->stacksize >= 0 ? info->stacksize : 0; 2516 } 2517 2518 return TRUE; 2519 } 2520 2521 static bfd_boolean 2522 lm32_elf_fdpic_copy_private_bfd_data (bfd *ibfd, bfd *obfd) 2523 { 2524 unsigned i; 2525 2526 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour 2527 || bfd_get_flavour (obfd) != bfd_target_elf_flavour) 2528 return TRUE; 2529 2530 if (! _bfd_elf_copy_private_bfd_data (ibfd, obfd)) 2531 return FALSE; 2532 2533 if (! elf_tdata (ibfd) || ! elf_tdata (ibfd)->phdr 2534 || ! elf_tdata (obfd) || ! elf_tdata (obfd)->phdr) 2535 return TRUE; 2536 2537 /* Copy the stack size. */ 2538 for (i = 0; i < elf_elfheader (ibfd)->e_phnum; i++) 2539 if (elf_tdata (ibfd)->phdr[i].p_type == PT_GNU_STACK) 2540 { 2541 Elf_Internal_Phdr *iphdr = &elf_tdata (ibfd)->phdr[i]; 2542 2543 for (i = 0; i < elf_elfheader (obfd)->e_phnum; i++) 2544 if (elf_tdata (obfd)->phdr[i].p_type == PT_GNU_STACK) 2545 { 2546 memcpy (&elf_tdata (obfd)->phdr[i], iphdr, sizeof (*iphdr)); 2547 2548 /* Rewrite the phdrs, since we're only called after they were first written. */ 2549 if (bfd_seek (obfd, (bfd_signed_vma) get_elf_backend_data (obfd) 2550 ->s->sizeof_ehdr, SEEK_SET) != 0 2551 || get_elf_backend_data (obfd)->s->write_out_phdrs (obfd, elf_tdata (obfd)->phdr, 2552 elf_elfheader (obfd)->e_phnum) != 0) 2553 return FALSE; 2554 break; 2555 } 2556 2557 break; 2558 } 2559 2560 return TRUE; 2561 } 2562 2563 2564 #define ELF_ARCH bfd_arch_lm32 2565 #define ELF_TARGET_ID LM32_ELF_DATA 2566 #define ELF_MACHINE_CODE EM_LATTICEMICO32 2567 #define ELF_MAXPAGESIZE 0x1000 2568 2569 #define TARGET_BIG_SYM lm32_elf32_vec 2570 #define TARGET_BIG_NAME "elf32-lm32" 2571 2572 #define bfd_elf32_bfd_reloc_type_lookup lm32_reloc_type_lookup 2573 #define bfd_elf32_bfd_reloc_name_lookup lm32_reloc_name_lookup 2574 #define elf_info_to_howto lm32_info_to_howto_rela 2575 #define elf_info_to_howto_rel NULL 2576 #define elf_backend_rela_normal 1 2577 #define elf_backend_object_p lm32_elf_object_p 2578 #define elf_backend_final_write_processing lm32_elf_final_write_processing 2579 #define elf_backend_stack_align 8 2580 #define elf_backend_can_gc_sections 1 2581 #define elf_backend_can_refcount 1 2582 #define elf_backend_gc_mark_hook lm32_elf_gc_mark_hook 2583 #define elf_backend_plt_readonly 1 2584 #define elf_backend_want_got_plt 1 2585 #define elf_backend_want_plt_sym 0 2586 #define elf_backend_got_header_size 12 2587 #define elf_backend_dtrel_excludes_plt 1 2588 #define bfd_elf32_bfd_link_hash_table_create lm32_elf_link_hash_table_create 2589 #define elf_backend_check_relocs lm32_elf_check_relocs 2590 #define elf_backend_reloc_type_class lm32_elf_reloc_type_class 2591 #define elf_backend_copy_indirect_symbol lm32_elf_copy_indirect_symbol 2592 #define elf_backend_size_dynamic_sections lm32_elf_size_dynamic_sections 2593 #define elf_backend_omit_section_dynsym _bfd_elf_omit_section_dynsym_all 2594 #define elf_backend_create_dynamic_sections lm32_elf_create_dynamic_sections 2595 #define elf_backend_finish_dynamic_sections lm32_elf_finish_dynamic_sections 2596 #define elf_backend_adjust_dynamic_symbol lm32_elf_adjust_dynamic_symbol 2597 #define elf_backend_finish_dynamic_symbol lm32_elf_finish_dynamic_symbol 2598 #define elf_backend_relocate_section lm32_elf_relocate_section 2599 2600 #include "elf32-target.h" 2601 2602 #undef ELF_MAXPAGESIZE 2603 #define ELF_MAXPAGESIZE 0x4000 2604 2605 2606 #undef TARGET_BIG_SYM 2607 #define TARGET_BIG_SYM lm32_elf32_fdpic_vec 2608 #undef TARGET_BIG_NAME 2609 #define TARGET_BIG_NAME "elf32-lm32fdpic" 2610 #undef elf32_bed 2611 #define elf32_bed elf32_lm32fdpic_bed 2612 2613 #undef elf_backend_always_size_sections 2614 #define elf_backend_always_size_sections lm32_elf_always_size_sections 2615 #undef bfd_elf32_bfd_copy_private_bfd_data 2616 #define bfd_elf32_bfd_copy_private_bfd_data lm32_elf_fdpic_copy_private_bfd_data 2617 2618 #include "elf32-target.h" 2619