1 /* 32-bit ELF support for Nios II. 2 Copyright (C) 2012-2018 Free Software Foundation, Inc. 3 Contributed by Nigel Gray (ngray@altera.com). 4 Contributed by Mentor Graphics, Inc. 5 6 This file is part of BFD, the Binary File Descriptor library. 7 8 This program is free software; you can redistribute it and/or modify 9 it under the terms of the GNU General Public License as published by 10 the Free Software Foundation; either version 3 of the License, or 11 (at your option) any later version. 12 13 This program is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 GNU General Public License for more details. 17 18 You should have received a copy of the GNU General Public License 19 along with this program; if not, write to the Free Software 20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 21 MA 02110-1301, USA. */ 22 23 /* This file handles Altera Nios II ELF targets. */ 24 25 #include "sysdep.h" 26 #include "bfd.h" 27 #include "libbfd.h" 28 #include "bfdlink.h" 29 #include "genlink.h" 30 #include "elf-bfd.h" 31 #include "elf/nios2.h" 32 #include "opcode/nios2.h" 33 #include "elf32-nios2.h" 34 #include "libiberty.h" 35 36 /* Use RELA relocations. */ 37 #ifndef USE_RELA 38 #define USE_RELA 39 #endif 40 41 #ifdef USE_REL 42 #undef USE_REL 43 #endif 44 45 /* Forward declarations. */ 46 static bfd_reloc_status_type nios2_elf32_ignore_reloc 47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 48 static bfd_reloc_status_type nios2_elf32_hi16_relocate 49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 50 static bfd_reloc_status_type nios2_elf32_lo16_relocate 51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 52 static bfd_reloc_status_type nios2_elf32_hiadj16_relocate 53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 54 static bfd_reloc_status_type nios2_elf32_pcrel_lo16_relocate 55 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 56 static bfd_reloc_status_type nios2_elf32_pcrel_hiadj16_relocate 57 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 58 static bfd_reloc_status_type nios2_elf32_pcrel16_relocate 59 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 60 static bfd_reloc_status_type nios2_elf32_call26_relocate 61 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 62 static bfd_reloc_status_type nios2_elf32_gprel_relocate 63 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 64 static bfd_reloc_status_type nios2_elf32_ujmp_relocate 65 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 66 static bfd_reloc_status_type nios2_elf32_cjmp_relocate 67 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 68 static bfd_reloc_status_type nios2_elf32_callr_relocate 69 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 70 71 /* Target vector. */ 72 extern const bfd_target nios2_elf32_le_vec; 73 extern const bfd_target nios2_elf32_be_vec; 74 75 /* Offset of tp and dtp pointers from start of TLS block. */ 76 #define TP_OFFSET 0x7000 77 #define DTP_OFFSET 0x8000 78 79 /* The relocation tables used for SHT_REL sections. There are separate 80 tables for R1 and R2 encodings. */ 81 static reloc_howto_type elf_nios2_r1_howto_table_rel[] = { 82 /* No relocation. */ 83 HOWTO (R_NIOS2_NONE, /* type */ 84 0, /* rightshift */ 85 3, /* size (0 = byte, 1 = short, 2 = long) */ 86 0, /* bitsize */ 87 FALSE, /* pc_relative */ 88 0, /* bitpos */ 89 complain_overflow_dont, /* complain_on_overflow */ 90 bfd_elf_generic_reloc, /* special_function */ 91 "R_NIOS2_NONE", /* name */ 92 FALSE, /* partial_inplace */ 93 0, /* src_mask */ 94 0, /* dst_mask */ 95 FALSE), /* pcrel_offset */ 96 97 /* 16-bit signed immediate relocation. */ 98 HOWTO (R_NIOS2_S16, /* type */ 99 0, /* rightshift */ 100 2, /* size (0 = byte, 1 = short, 2 = long) */ 101 16, /* bitsize */ 102 FALSE, /* pc_relative */ 103 6, /* bitpos */ 104 complain_overflow_signed, /* complain on overflow */ 105 bfd_elf_generic_reloc, /* special function */ 106 "R_NIOS2_S16", /* name */ 107 FALSE, /* partial_inplace */ 108 0x003fffc0, /* src_mask */ 109 0x003fffc0, /* dest_mask */ 110 FALSE), /* pcrel_offset */ 111 112 /* 16-bit unsigned immediate relocation. */ 113 HOWTO (R_NIOS2_U16, /* type */ 114 0, /* rightshift */ 115 2, /* size (0 = byte, 1 = short, 2 = long) */ 116 16, /* bitsize */ 117 FALSE, /* pc_relative */ 118 6, /* bitpos */ 119 complain_overflow_unsigned, /* complain on overflow */ 120 bfd_elf_generic_reloc, /* special function */ 121 "R_NIOS2_U16", /* name */ 122 FALSE, /* partial_inplace */ 123 0x003fffc0, /* src_mask */ 124 0x003fffc0, /* dest_mask */ 125 FALSE), /* pcrel_offset */ 126 127 HOWTO (R_NIOS2_PCREL16, /* type */ 128 0, /* rightshift */ 129 2, /* size (0 = byte, 1 = short, 2 = long) */ 130 16, /* bitsize */ 131 TRUE, /* pc_relative */ 132 6, /* bitpos */ 133 complain_overflow_signed, /* complain on overflow */ 134 nios2_elf32_pcrel16_relocate, /* special function */ 135 "R_NIOS2_PCREL16", /* name */ 136 FALSE, /* partial_inplace */ 137 0x003fffc0, /* src_mask */ 138 0x003fffc0, /* dest_mask */ 139 TRUE), /* pcrel_offset */ 140 141 HOWTO (R_NIOS2_CALL26, /* type */ 142 2, /* rightshift */ 143 2, /* size (0 = byte, 1 = short, 2 = long) */ 144 26, /* bitsize */ 145 FALSE, /* pc_relative */ 146 6, /* bitpos */ 147 complain_overflow_dont, /* complain on overflow */ 148 nios2_elf32_call26_relocate, /* special function */ 149 "R_NIOS2_CALL26", /* name */ 150 FALSE, /* partial_inplace */ 151 0xffffffc0, /* src_mask */ 152 0xffffffc0, /* dst_mask */ 153 FALSE), /* pcrel_offset */ 154 155 HOWTO (R_NIOS2_IMM5, 156 0, 157 2, 158 5, 159 FALSE, 160 6, 161 complain_overflow_bitfield, 162 bfd_elf_generic_reloc, 163 "R_NIOS2_IMM5", 164 FALSE, 165 0x000007c0, 166 0x000007c0, 167 FALSE), 168 169 HOWTO (R_NIOS2_CACHE_OPX, 170 0, 171 2, 172 5, 173 FALSE, 174 22, 175 complain_overflow_bitfield, 176 bfd_elf_generic_reloc, 177 "R_NIOS2_CACHE_OPX", 178 FALSE, 179 0x07c00000, 180 0x07c00000, 181 FALSE), 182 183 HOWTO (R_NIOS2_IMM6, 184 0, 185 2, 186 6, 187 FALSE, 188 6, 189 complain_overflow_bitfield, 190 bfd_elf_generic_reloc, 191 "R_NIOS2_IMM6", 192 FALSE, 193 0x00000fc0, 194 0x00000fc0, 195 FALSE), 196 197 HOWTO (R_NIOS2_IMM8, 198 0, 199 2, 200 8, 201 FALSE, 202 6, 203 complain_overflow_bitfield, 204 bfd_elf_generic_reloc, 205 "R_NIOS2_IMM8", 206 FALSE, 207 0x00003fc0, 208 0x00003fc0, 209 FALSE), 210 211 HOWTO (R_NIOS2_HI16, 212 0, 213 2, 214 32, 215 FALSE, 216 6, 217 complain_overflow_dont, 218 nios2_elf32_hi16_relocate, 219 "R_NIOS2_HI16", 220 FALSE, 221 0x003fffc0, 222 0x003fffc0, 223 FALSE), 224 225 HOWTO (R_NIOS2_LO16, 226 0, 227 2, 228 32, 229 FALSE, 230 6, 231 complain_overflow_dont, 232 nios2_elf32_lo16_relocate, 233 "R_NIOS2_LO16", 234 FALSE, 235 0x003fffc0, 236 0x003fffc0, 237 FALSE), 238 239 HOWTO (R_NIOS2_HIADJ16, 240 0, 241 2, 242 32, 243 FALSE, 244 6, 245 complain_overflow_dont, 246 nios2_elf32_hiadj16_relocate, 247 "R_NIOS2_HIADJ16", 248 FALSE, 249 0x003fffc0, 250 0x003fffc0, 251 FALSE), 252 253 HOWTO (R_NIOS2_BFD_RELOC_32, 254 0, 255 2, /* long */ 256 32, 257 FALSE, 258 0, 259 complain_overflow_dont, 260 bfd_elf_generic_reloc, 261 "R_NIOS2_BFD_RELOC32", 262 FALSE, 263 0xffffffff, 264 0xffffffff, 265 FALSE), 266 267 HOWTO (R_NIOS2_BFD_RELOC_16, 268 0, 269 1, /* short */ 270 16, 271 FALSE, 272 0, 273 complain_overflow_bitfield, 274 bfd_elf_generic_reloc, 275 "R_NIOS2_BFD_RELOC16", 276 FALSE, 277 0x0000ffff, 278 0x0000ffff, 279 FALSE), 280 281 HOWTO (R_NIOS2_BFD_RELOC_8, 282 0, 283 0, /* byte */ 284 8, 285 FALSE, 286 0, 287 complain_overflow_bitfield, 288 bfd_elf_generic_reloc, 289 "R_NIOS2_BFD_RELOC8", 290 FALSE, 291 0x000000ff, 292 0x000000ff, 293 FALSE), 294 295 HOWTO (R_NIOS2_GPREL, 296 0, 297 2, 298 32, 299 FALSE, 300 6, 301 complain_overflow_dont, 302 nios2_elf32_gprel_relocate, 303 "R_NIOS2_GPREL", 304 FALSE, 305 0x003fffc0, 306 0x003fffc0, 307 FALSE), 308 309 HOWTO (R_NIOS2_GNU_VTINHERIT, 310 0, 311 2, /* short */ 312 0, 313 FALSE, 314 0, 315 complain_overflow_dont, 316 NULL, 317 "R_NIOS2_GNU_VTINHERIT", 318 FALSE, 319 0, 320 0, 321 FALSE), 322 323 HOWTO (R_NIOS2_GNU_VTENTRY, 324 0, 325 2, /* byte */ 326 0, 327 FALSE, 328 0, 329 complain_overflow_dont, 330 _bfd_elf_rel_vtable_reloc_fn, 331 "R_NIOS2_GNU_VTENTRY", 332 FALSE, 333 0, 334 0, 335 FALSE), 336 337 HOWTO (R_NIOS2_UJMP, 338 0, 339 2, 340 32, 341 FALSE, 342 6, 343 complain_overflow_dont, 344 nios2_elf32_ujmp_relocate, 345 "R_NIOS2_UJMP", 346 FALSE, 347 0x003fffc0, 348 0x003fffc0, 349 FALSE), 350 351 HOWTO (R_NIOS2_CJMP, 352 0, 353 2, 354 32, 355 FALSE, 356 6, 357 complain_overflow_dont, 358 nios2_elf32_cjmp_relocate, 359 "R_NIOS2_CJMP", 360 FALSE, 361 0x003fffc0, 362 0x003fffc0, 363 FALSE), 364 365 HOWTO (R_NIOS2_CALLR, 366 0, 367 2, 368 32, 369 FALSE, 370 6, 371 complain_overflow_dont, 372 nios2_elf32_callr_relocate, 373 "R_NIOS2_CALLR", 374 FALSE, 375 0x003fffc0, 376 0x003fffc0, 377 FALSE), 378 379 HOWTO (R_NIOS2_ALIGN, 380 0, 381 2, 382 0, 383 FALSE, 384 0, 385 complain_overflow_dont, 386 nios2_elf32_ignore_reloc, 387 "R_NIOS2_ALIGN", 388 FALSE, 389 0, 390 0, 391 TRUE), 392 393 394 HOWTO (R_NIOS2_GOT16, 395 0, 396 2, 397 16, 398 FALSE, 399 6, 400 complain_overflow_bitfield, 401 bfd_elf_generic_reloc, 402 "R_NIOS2_GOT16", 403 FALSE, 404 0x003fffc0, 405 0x003fffc0, 406 FALSE), 407 408 HOWTO (R_NIOS2_CALL16, 409 0, 410 2, 411 16, 412 FALSE, 413 6, 414 complain_overflow_bitfield, 415 bfd_elf_generic_reloc, 416 "R_NIOS2_CALL16", 417 FALSE, 418 0x003fffc0, 419 0x003fffc0, 420 FALSE), 421 422 HOWTO (R_NIOS2_GOTOFF_LO, 423 0, 424 2, 425 16, 426 FALSE, 427 6, 428 complain_overflow_dont, 429 bfd_elf_generic_reloc, 430 "R_NIOS2_GOTOFF_LO", 431 FALSE, 432 0x003fffc0, 433 0x003fffc0, 434 FALSE), 435 436 HOWTO (R_NIOS2_GOTOFF_HA, 437 0, 438 2, 439 16, 440 FALSE, 441 6, 442 complain_overflow_dont, 443 bfd_elf_generic_reloc, 444 "R_NIOS2_GOTOFF_HA", 445 FALSE, 446 0x003fffc0, 447 0x003fffc0, 448 FALSE), 449 450 HOWTO (R_NIOS2_PCREL_LO, 451 0, 452 2, 453 16, 454 TRUE, 455 6, 456 complain_overflow_dont, 457 nios2_elf32_pcrel_lo16_relocate, 458 "R_NIOS2_PCREL_LO", 459 FALSE, 460 0x003fffc0, 461 0x003fffc0, 462 TRUE), 463 464 HOWTO (R_NIOS2_PCREL_HA, 465 0, 466 2, 467 16, 468 FALSE, /* This is a PC-relative relocation, but we need to subtract 469 PC ourselves before the HIADJ. */ 470 6, 471 complain_overflow_dont, 472 nios2_elf32_pcrel_hiadj16_relocate, 473 "R_NIOS2_PCREL_HA", 474 FALSE, 475 0x003fffc0, 476 0x003fffc0, 477 TRUE), 478 479 HOWTO (R_NIOS2_TLS_GD16, 480 0, 481 2, 482 16, 483 FALSE, 484 6, 485 complain_overflow_bitfield, 486 bfd_elf_generic_reloc, 487 "R_NIOS2_TLS_GD16", 488 FALSE, 489 0x003fffc0, 490 0x003fffc0, 491 FALSE), 492 493 HOWTO (R_NIOS2_TLS_LDM16, 494 0, 495 2, 496 16, 497 FALSE, 498 6, 499 complain_overflow_bitfield, 500 bfd_elf_generic_reloc, 501 "R_NIOS2_TLS_LDM16", 502 FALSE, 503 0x003fffc0, 504 0x003fffc0, 505 FALSE), 506 507 HOWTO (R_NIOS2_TLS_LDO16, 508 0, 509 2, 510 16, 511 FALSE, 512 6, 513 complain_overflow_bitfield, 514 bfd_elf_generic_reloc, 515 "R_NIOS2_TLS_LDO16", 516 FALSE, 517 0x003fffc0, 518 0x003fffc0, 519 FALSE), 520 521 HOWTO (R_NIOS2_TLS_IE16, 522 0, 523 2, 524 16, 525 FALSE, 526 6, 527 complain_overflow_bitfield, 528 bfd_elf_generic_reloc, 529 "R_NIOS2_TLS_IE16", 530 FALSE, 531 0x003fffc0, 532 0x003fffc0, 533 FALSE), 534 535 HOWTO (R_NIOS2_TLS_LE16, 536 0, 537 2, 538 16, 539 FALSE, 540 6, 541 complain_overflow_bitfield, 542 bfd_elf_generic_reloc, 543 "R_NIOS2_TLS_LE16", 544 FALSE, 545 0x003fffc0, 546 0x003fffc0, 547 FALSE), 548 549 HOWTO (R_NIOS2_TLS_DTPMOD, 550 0, 551 2, 552 32, 553 FALSE, 554 0, 555 complain_overflow_dont, 556 bfd_elf_generic_reloc, 557 "R_NIOS2_TLS_DTPMOD", 558 FALSE, 559 0xffffffff, 560 0xffffffff, 561 FALSE), 562 563 HOWTO (R_NIOS2_TLS_DTPREL, 564 0, 565 2, 566 32, 567 FALSE, 568 0, 569 complain_overflow_dont, 570 bfd_elf_generic_reloc, 571 "R_NIOS2_TLS_DTPREL", 572 FALSE, 573 0xffffffff, 574 0xffffffff, 575 FALSE), 576 577 HOWTO (R_NIOS2_TLS_TPREL, 578 0, 579 2, 580 32, 581 FALSE, 582 0, 583 complain_overflow_dont, 584 bfd_elf_generic_reloc, 585 "R_NIOS2_TLS_TPREL", 586 FALSE, 587 0xffffffff, 588 0xffffffff, 589 FALSE), 590 591 HOWTO (R_NIOS2_COPY, 592 0, 593 2, 594 32, 595 FALSE, 596 0, 597 complain_overflow_dont, 598 bfd_elf_generic_reloc, 599 "R_NIOS2_COPY", 600 FALSE, 601 0, 602 0, 603 FALSE), 604 605 HOWTO (R_NIOS2_GLOB_DAT, 606 0, 607 2, 608 32, 609 FALSE, 610 0, 611 complain_overflow_dont, 612 bfd_elf_generic_reloc, 613 "R_NIOS2_GLOB_DAT", 614 FALSE, 615 0xffffffff, 616 0xffffffff, 617 FALSE), 618 619 HOWTO (R_NIOS2_JUMP_SLOT, 620 0, 621 2, 622 32, 623 FALSE, 624 0, 625 complain_overflow_dont, 626 bfd_elf_generic_reloc, 627 "R_NIOS2_JUMP_SLOT", 628 FALSE, 629 0xffffffff, 630 0xffffffff, 631 FALSE), 632 633 HOWTO (R_NIOS2_RELATIVE, 634 0, 635 2, 636 32, 637 FALSE, 638 0, 639 complain_overflow_dont, 640 bfd_elf_generic_reloc, 641 "R_NIOS2_RELATIVE", 642 FALSE, 643 0xffffffff, 644 0xffffffff, 645 FALSE), 646 647 HOWTO (R_NIOS2_GOTOFF, 648 0, 649 2, 650 32, 651 FALSE, 652 0, 653 complain_overflow_dont, 654 bfd_elf_generic_reloc, 655 "R_NIOS2_GOTOFF", 656 FALSE, 657 0xffffffff, 658 0xffffffff, 659 FALSE), 660 661 HOWTO (R_NIOS2_CALL26_NOAT, /* type */ 662 2, /* rightshift */ 663 2, /* size (0 = byte, 1 = short, 2 = long) */ 664 26, /* bitsize */ 665 FALSE, /* pc_relative */ 666 6, /* bitpos */ 667 complain_overflow_dont, /* complain on overflow */ 668 nios2_elf32_call26_relocate, /* special function */ 669 "R_NIOS2_CALL26_NOAT", /* name */ 670 FALSE, /* partial_inplace */ 671 0xffffffc0, /* src_mask */ 672 0xffffffc0, /* dst_mask */ 673 FALSE), /* pcrel_offset */ 674 675 HOWTO (R_NIOS2_GOT_LO, 676 0, 677 2, 678 16, 679 FALSE, 680 6, 681 complain_overflow_dont, 682 bfd_elf_generic_reloc, 683 "R_NIOS2_GOT_LO", 684 FALSE, 685 0x003fffc0, 686 0x003fffc0, 687 FALSE), 688 689 HOWTO (R_NIOS2_GOT_HA, 690 0, 691 2, 692 16, 693 FALSE, 694 6, 695 complain_overflow_dont, 696 bfd_elf_generic_reloc, 697 "R_NIOS2_GOT_HA", 698 FALSE, 699 0x003fffc0, 700 0x003fffc0, 701 FALSE), 702 703 HOWTO (R_NIOS2_CALL_LO, 704 0, 705 2, 706 16, 707 FALSE, 708 6, 709 complain_overflow_dont, 710 bfd_elf_generic_reloc, 711 "R_NIOS2_CALL_LO", 712 FALSE, 713 0x003fffc0, 714 0x003fffc0, 715 FALSE), 716 717 HOWTO (R_NIOS2_CALL_HA, 718 0, 719 2, 720 16, 721 FALSE, 722 6, 723 complain_overflow_dont, 724 bfd_elf_generic_reloc, 725 "R_NIOS2_CALL_HA", 726 FALSE, 727 0x003fffc0, 728 0x003fffc0, 729 FALSE), 730 731 /* Add other relocations here. */ 732 }; 733 734 static reloc_howto_type elf_nios2_r2_howto_table_rel[] = { 735 /* No relocation. */ 736 HOWTO (R_NIOS2_NONE, /* type */ 737 0, /* rightshift */ 738 0, /* size (0 = byte, 1 = short, 2 = long) */ 739 0, /* bitsize */ 740 FALSE, /* pc_relative */ 741 0, /* bitpos */ 742 complain_overflow_dont, /* complain_on_overflow */ 743 bfd_elf_generic_reloc, /* special_function */ 744 "R_NIOS2_NONE", /* name */ 745 FALSE, /* partial_inplace */ 746 0, /* src_mask */ 747 0, /* dst_mask */ 748 FALSE), /* pcrel_offset */ 749 750 /* 16-bit signed immediate relocation. */ 751 HOWTO (R_NIOS2_S16, /* type */ 752 0, /* rightshift */ 753 2, /* size (0 = byte, 1 = short, 2 = long) */ 754 16, /* bitsize */ 755 FALSE, /* pc_relative */ 756 16, /* bitpos */ 757 complain_overflow_signed, /* complain on overflow */ 758 bfd_elf_generic_reloc, /* special function */ 759 "R_NIOS2_S16", /* name */ 760 FALSE, /* partial_inplace */ 761 0xffff0000, /* src_mask */ 762 0xffff0000, /* dest_mask */ 763 FALSE), /* pcrel_offset */ 764 765 /* 16-bit unsigned immediate relocation. */ 766 HOWTO (R_NIOS2_U16, /* type */ 767 0, /* rightshift */ 768 2, /* size (0 = byte, 1 = short, 2 = long) */ 769 16, /* bitsize */ 770 FALSE, /* pc_relative */ 771 16, /* bitpos */ 772 complain_overflow_unsigned, /* complain on overflow */ 773 bfd_elf_generic_reloc, /* special function */ 774 "R_NIOS2_U16", /* name */ 775 FALSE, /* partial_inplace */ 776 0xffff0000, /* src_mask */ 777 0xffff0000, /* dest_mask */ 778 FALSE), /* pcrel_offset */ 779 780 HOWTO (R_NIOS2_PCREL16, /* type */ 781 0, /* rightshift */ 782 2, /* size (0 = byte, 1 = short, 2 = long) */ 783 16, /* bitsize */ 784 TRUE, /* pc_relative */ 785 16, /* bitpos */ 786 complain_overflow_signed, /* complain on overflow */ 787 nios2_elf32_pcrel16_relocate, /* special function */ 788 "R_NIOS2_PCREL16", /* name */ 789 FALSE, /* partial_inplace */ 790 0xffff0000, /* src_mask */ 791 0xffff0000, /* dest_mask */ 792 TRUE), /* pcrel_offset */ 793 794 HOWTO (R_NIOS2_CALL26, /* type */ 795 2, /* rightshift */ 796 2, /* size (0 = byte, 1 = short, 2 = long) */ 797 26, /* bitsize */ 798 FALSE, /* pc_relative */ 799 6, /* bitpos */ 800 complain_overflow_dont, /* complain on overflow */ 801 nios2_elf32_call26_relocate, /* special function */ 802 "R_NIOS2_CALL26", /* name */ 803 FALSE, /* partial_inplace */ 804 0xffffffc0, /* src_mask */ 805 0xffffffc0, /* dst_mask */ 806 FALSE), /* pcrel_offset */ 807 808 HOWTO (R_NIOS2_IMM5, 809 0, 810 2, 811 5, 812 FALSE, 813 21, 814 complain_overflow_bitfield, 815 bfd_elf_generic_reloc, 816 "R_NIOS2_IMM5", 817 FALSE, 818 0x03e00000, 819 0x03e00000, 820 FALSE), 821 822 HOWTO (R_NIOS2_CACHE_OPX, 823 0, 824 2, 825 5, 826 FALSE, 827 11, 828 complain_overflow_bitfield, 829 bfd_elf_generic_reloc, 830 "R_NIOS2_CACHE_OPX", 831 FALSE, 832 0x0000f800, 833 0x0000f800, 834 FALSE), 835 836 HOWTO (R_NIOS2_IMM6, 837 0, 838 2, 839 6, 840 FALSE, 841 26, 842 complain_overflow_bitfield, 843 bfd_elf_generic_reloc, 844 "R_NIOS2_IMM6", 845 FALSE, 846 0xfc000000, 847 0xfc000000, 848 FALSE), 849 850 HOWTO (R_NIOS2_IMM8, 851 0, 852 2, 853 8, 854 FALSE, 855 24, 856 complain_overflow_bitfield, 857 bfd_elf_generic_reloc, 858 "R_NIOS2_IMM8", 859 FALSE, 860 0xff000000, 861 0xff000000, 862 FALSE), 863 864 HOWTO (R_NIOS2_HI16, 865 0, 866 2, 867 32, 868 FALSE, 869 16, 870 complain_overflow_dont, 871 nios2_elf32_hi16_relocate, 872 "R_NIOS2_HI16", 873 FALSE, 874 0xffff0000, 875 0xffff0000, 876 FALSE), 877 878 HOWTO (R_NIOS2_LO16, 879 0, 880 2, 881 32, 882 FALSE, 883 16, 884 complain_overflow_dont, 885 nios2_elf32_lo16_relocate, 886 "R_NIOS2_LO16", 887 FALSE, 888 0xffff0000, 889 0xffff0000, 890 FALSE), 891 892 HOWTO (R_NIOS2_HIADJ16, 893 0, 894 2, 895 32, 896 FALSE, 897 16, 898 complain_overflow_dont, 899 nios2_elf32_hiadj16_relocate, 900 "R_NIOS2_HIADJ16", 901 FALSE, 902 0xffff0000, 903 0xffff0000, 904 FALSE), 905 906 HOWTO (R_NIOS2_BFD_RELOC_32, 907 0, 908 2, /* long */ 909 32, 910 FALSE, 911 0, 912 complain_overflow_dont, 913 bfd_elf_generic_reloc, 914 "R_NIOS2_BFD_RELOC32", 915 FALSE, 916 0xffffffff, 917 0xffffffff, 918 FALSE), 919 920 HOWTO (R_NIOS2_BFD_RELOC_16, 921 0, 922 1, /* short */ 923 16, 924 FALSE, 925 0, 926 complain_overflow_bitfield, 927 bfd_elf_generic_reloc, 928 "R_NIOS2_BFD_RELOC16", 929 FALSE, 930 0x0000ffff, 931 0x0000ffff, 932 FALSE), 933 934 HOWTO (R_NIOS2_BFD_RELOC_8, 935 0, 936 0, /* byte */ 937 8, 938 FALSE, 939 0, 940 complain_overflow_bitfield, 941 bfd_elf_generic_reloc, 942 "R_NIOS2_BFD_RELOC8", 943 FALSE, 944 0x000000ff, 945 0x000000ff, 946 FALSE), 947 948 HOWTO (R_NIOS2_GPREL, 949 0, 950 2, 951 32, 952 FALSE, 953 16, 954 complain_overflow_dont, 955 nios2_elf32_gprel_relocate, 956 "R_NIOS2_GPREL", 957 FALSE, 958 0xffff0000, 959 0xffff0000, 960 FALSE), 961 962 HOWTO (R_NIOS2_GNU_VTINHERIT, 963 0, 964 2, /* short */ 965 0, 966 FALSE, 967 0, 968 complain_overflow_dont, 969 NULL, 970 "R_NIOS2_GNU_VTINHERIT", 971 FALSE, 972 0, 973 0, 974 FALSE), 975 976 HOWTO (R_NIOS2_GNU_VTENTRY, 977 0, 978 2, /* byte */ 979 0, 980 FALSE, 981 0, 982 complain_overflow_dont, 983 _bfd_elf_rel_vtable_reloc_fn, 984 "R_NIOS2_GNU_VTENTRY", 985 FALSE, 986 0, 987 0, 988 FALSE), 989 990 HOWTO (R_NIOS2_UJMP, 991 0, 992 2, 993 32, 994 FALSE, 995 16, 996 complain_overflow_dont, 997 nios2_elf32_ujmp_relocate, 998 "R_NIOS2_UJMP", 999 FALSE, 1000 0xffff0000, 1001 0xffff0000, 1002 FALSE), 1003 1004 HOWTO (R_NIOS2_CJMP, 1005 0, 1006 2, 1007 32, 1008 FALSE, 1009 16, 1010 complain_overflow_dont, 1011 nios2_elf32_cjmp_relocate, 1012 "R_NIOS2_CJMP", 1013 FALSE, 1014 0xffff0000, 1015 0xffff0000, 1016 FALSE), 1017 1018 HOWTO (R_NIOS2_CALLR, 1019 0, 1020 2, 1021 32, 1022 FALSE, 1023 16, 1024 complain_overflow_dont, 1025 nios2_elf32_callr_relocate, 1026 "R_NIOS2_CALLR", 1027 FALSE, 1028 0xffff0000, 1029 0xffff0000, 1030 FALSE), 1031 1032 HOWTO (R_NIOS2_ALIGN, 1033 0, 1034 2, 1035 0, 1036 FALSE, 1037 0, 1038 complain_overflow_dont, 1039 nios2_elf32_ignore_reloc, 1040 "R_NIOS2_ALIGN", 1041 FALSE, 1042 0, 1043 0, 1044 TRUE), 1045 1046 HOWTO (R_NIOS2_GOT16, 1047 0, 1048 2, 1049 16, 1050 FALSE, 1051 16, 1052 complain_overflow_bitfield, 1053 bfd_elf_generic_reloc, 1054 "R_NIOS2_GOT16", 1055 FALSE, 1056 0xffff0000, 1057 0xffff0000, 1058 FALSE), 1059 1060 HOWTO (R_NIOS2_CALL16, 1061 0, 1062 2, 1063 16, 1064 FALSE, 1065 16, 1066 complain_overflow_bitfield, 1067 bfd_elf_generic_reloc, 1068 "R_NIOS2_CALL16", 1069 FALSE, 1070 0xffff0000, 1071 0xffff0000, 1072 FALSE), 1073 1074 HOWTO (R_NIOS2_GOTOFF_LO, 1075 0, 1076 2, 1077 16, 1078 FALSE, 1079 16, 1080 complain_overflow_dont, 1081 bfd_elf_generic_reloc, 1082 "R_NIOS2_GOTOFF_LO", 1083 FALSE, 1084 0xffff0000, 1085 0xffff0000, 1086 FALSE), 1087 1088 HOWTO (R_NIOS2_GOTOFF_HA, 1089 0, 1090 2, 1091 16, 1092 FALSE, 1093 16, 1094 complain_overflow_dont, 1095 bfd_elf_generic_reloc, 1096 "R_NIOS2_GOTOFF_HA", 1097 FALSE, 1098 0xffff0000, 1099 0xffff0000, 1100 FALSE), 1101 1102 HOWTO (R_NIOS2_PCREL_LO, 1103 0, 1104 2, 1105 16, 1106 TRUE, 1107 16, 1108 complain_overflow_dont, 1109 nios2_elf32_pcrel_lo16_relocate, 1110 "R_NIOS2_PCREL_LO", 1111 FALSE, 1112 0xffff0000, 1113 0xffff0000, 1114 TRUE), 1115 1116 HOWTO (R_NIOS2_PCREL_HA, 1117 0, 1118 2, 1119 16, 1120 FALSE, /* This is a PC-relative relocation, but we need to subtract 1121 PC ourselves before the HIADJ. */ 1122 16, 1123 complain_overflow_dont, 1124 nios2_elf32_pcrel_hiadj16_relocate, 1125 "R_NIOS2_PCREL_HA", 1126 FALSE, 1127 0xffff0000, 1128 0xffff0000, 1129 TRUE), 1130 1131 HOWTO (R_NIOS2_TLS_GD16, 1132 0, 1133 2, 1134 16, 1135 FALSE, 1136 16, 1137 complain_overflow_bitfield, 1138 bfd_elf_generic_reloc, 1139 "R_NIOS2_TLS_GD16", 1140 FALSE, 1141 0xffff0000, 1142 0xffff0000, 1143 FALSE), 1144 1145 HOWTO (R_NIOS2_TLS_LDM16, 1146 0, 1147 2, 1148 16, 1149 FALSE, 1150 16, 1151 complain_overflow_bitfield, 1152 bfd_elf_generic_reloc, 1153 "R_NIOS2_TLS_LDM16", 1154 FALSE, 1155 0xffff0000, 1156 0xffff0000, 1157 FALSE), 1158 1159 HOWTO (R_NIOS2_TLS_LDO16, 1160 0, 1161 2, 1162 16, 1163 FALSE, 1164 16, 1165 complain_overflow_bitfield, 1166 bfd_elf_generic_reloc, 1167 "R_NIOS2_TLS_LDO16", 1168 FALSE, 1169 0xffff0000, 1170 0xffff0000, 1171 FALSE), 1172 1173 HOWTO (R_NIOS2_TLS_IE16, 1174 0, 1175 2, 1176 16, 1177 FALSE, 1178 16, 1179 complain_overflow_bitfield, 1180 bfd_elf_generic_reloc, 1181 "R_NIOS2_TLS_IE16", 1182 FALSE, 1183 0xffff0000, 1184 0xffff0000, 1185 FALSE), 1186 1187 HOWTO (R_NIOS2_TLS_LE16, 1188 0, 1189 2, 1190 16, 1191 FALSE, 1192 16, 1193 complain_overflow_bitfield, 1194 bfd_elf_generic_reloc, 1195 "R_NIOS2_TLS_LE16", 1196 FALSE, 1197 0xffff0000, 1198 0xffff0000, 1199 FALSE), 1200 1201 HOWTO (R_NIOS2_TLS_DTPMOD, 1202 0, 1203 2, 1204 32, 1205 FALSE, 1206 0, 1207 complain_overflow_dont, 1208 bfd_elf_generic_reloc, 1209 "R_NIOS2_TLS_DTPMOD", 1210 FALSE, 1211 0xffffffff, 1212 0xffffffff, 1213 FALSE), 1214 1215 HOWTO (R_NIOS2_TLS_DTPREL, 1216 0, 1217 2, 1218 32, 1219 FALSE, 1220 0, 1221 complain_overflow_dont, 1222 bfd_elf_generic_reloc, 1223 "R_NIOS2_TLS_DTPREL", 1224 FALSE, 1225 0xffffffff, 1226 0xffffffff, 1227 FALSE), 1228 1229 HOWTO (R_NIOS2_TLS_TPREL, 1230 0, 1231 2, 1232 32, 1233 FALSE, 1234 0, 1235 complain_overflow_dont, 1236 bfd_elf_generic_reloc, 1237 "R_NIOS2_TLS_TPREL", 1238 FALSE, 1239 0xffffffff, 1240 0xffffffff, 1241 FALSE), 1242 1243 HOWTO (R_NIOS2_COPY, 1244 0, 1245 2, 1246 32, 1247 FALSE, 1248 0, 1249 complain_overflow_dont, 1250 bfd_elf_generic_reloc, 1251 "R_NIOS2_COPY", 1252 FALSE, 1253 0, 1254 0, 1255 FALSE), 1256 1257 HOWTO (R_NIOS2_GLOB_DAT, 1258 0, 1259 2, 1260 32, 1261 FALSE, 1262 0, 1263 complain_overflow_dont, 1264 bfd_elf_generic_reloc, 1265 "R_NIOS2_GLOB_DAT", 1266 FALSE, 1267 0xffffffff, 1268 0xffffffff, 1269 FALSE), 1270 1271 HOWTO (R_NIOS2_JUMP_SLOT, 1272 0, 1273 2, 1274 32, 1275 FALSE, 1276 0, 1277 complain_overflow_dont, 1278 bfd_elf_generic_reloc, 1279 "R_NIOS2_JUMP_SLOT", 1280 FALSE, 1281 0xffffffff, 1282 0xffffffff, 1283 FALSE), 1284 1285 HOWTO (R_NIOS2_RELATIVE, 1286 0, 1287 2, 1288 32, 1289 FALSE, 1290 0, 1291 complain_overflow_dont, 1292 bfd_elf_generic_reloc, 1293 "R_NIOS2_RELATIVE", 1294 FALSE, 1295 0xffffffff, 1296 0xffffffff, 1297 FALSE), 1298 1299 HOWTO (R_NIOS2_GOTOFF, 1300 0, 1301 2, 1302 32, 1303 FALSE, 1304 0, 1305 complain_overflow_dont, 1306 bfd_elf_generic_reloc, 1307 "R_NIOS2_GOTOFF", 1308 FALSE, 1309 0xffffffff, 1310 0xffffffff, 1311 FALSE), 1312 1313 HOWTO (R_NIOS2_CALL26_NOAT, /* type */ 1314 2, /* rightshift */ 1315 2, /* size (0 = byte, 1 = short, 2 = long) */ 1316 26, /* bitsize */ 1317 FALSE, /* pc_relative */ 1318 6, /* bitpos */ 1319 complain_overflow_dont, /* complain on overflow */ 1320 nios2_elf32_call26_relocate, /* special function */ 1321 "R_NIOS2_CALL26_NOAT", /* name */ 1322 FALSE, /* partial_inplace */ 1323 0xffffffc0, /* src_mask */ 1324 0xffffffc0, /* dst_mask */ 1325 FALSE), /* pcrel_offset */ 1326 1327 HOWTO (R_NIOS2_GOT_LO, 1328 0, 1329 2, 1330 16, 1331 FALSE, 1332 16, 1333 complain_overflow_dont, 1334 bfd_elf_generic_reloc, 1335 "R_NIOS2_GOT_LO", 1336 FALSE, 1337 0xffff0000, 1338 0xffff0000, 1339 FALSE), 1340 1341 HOWTO (R_NIOS2_GOT_HA, 1342 0, 1343 2, 1344 16, 1345 FALSE, 1346 16, 1347 complain_overflow_dont, 1348 bfd_elf_generic_reloc, 1349 "R_NIOS2_GOT_HA", 1350 FALSE, 1351 0xffff0000, 1352 0xffff0000, 1353 FALSE), 1354 1355 HOWTO (R_NIOS2_CALL_LO, 1356 0, 1357 2, 1358 16, 1359 FALSE, 1360 16, 1361 complain_overflow_dont, 1362 bfd_elf_generic_reloc, 1363 "R_NIOS2_CALL_LO", 1364 FALSE, 1365 0xffff0000, 1366 0xffff0000, 1367 FALSE), 1368 1369 HOWTO (R_NIOS2_CALL_HA, 1370 0, 1371 2, 1372 16, 1373 FALSE, 1374 16, 1375 complain_overflow_dont, 1376 bfd_elf_generic_reloc, 1377 "R_NIOS2_CALL_HA", 1378 FALSE, 1379 0xffff0000, 1380 0xffff0000, 1381 FALSE), 1382 1383 HOWTO (R_NIOS2_R2_S12, 1384 0, 1385 2, 1386 12, 1387 FALSE, 1388 16, 1389 complain_overflow_signed, 1390 bfd_elf_generic_reloc, 1391 "R_NIOS2_R2_S12", 1392 FALSE, 1393 0x0fff0000, 1394 0x0fff0000, 1395 FALSE), 1396 1397 HOWTO (R_NIOS2_R2_I10_1_PCREL, 1398 1, 1399 1, 1400 10, 1401 TRUE, 1402 6, 1403 complain_overflow_signed, 1404 bfd_elf_generic_reloc, /* FIXME? */ 1405 "R_NIOS2_R2_I10_1_PCREL", 1406 FALSE, 1407 0xffc0, 1408 0xffc0, 1409 TRUE), 1410 1411 HOWTO (R_NIOS2_R2_T1I7_1_PCREL, 1412 1, 1413 1, 1414 7, 1415 TRUE, 1416 9, 1417 complain_overflow_signed, 1418 bfd_elf_generic_reloc, /* FIXME? */ 1419 "R_NIOS2_R2_T1I7_1_PCREL", 1420 FALSE, 1421 0xfe00, 1422 0xfe00, 1423 TRUE), 1424 1425 HOWTO (R_NIOS2_R2_T1I7_2, 1426 2, 1427 1, 1428 7, 1429 FALSE, 1430 9, 1431 complain_overflow_unsigned, 1432 bfd_elf_generic_reloc, 1433 "R_NIOS2_R2_T1I7_2", 1434 FALSE, 1435 0xfe00, 1436 0xfe00, 1437 FALSE), 1438 1439 HOWTO (R_NIOS2_R2_T2I4, 1440 0, 1441 1, 1442 4, 1443 FALSE, 1444 12, 1445 complain_overflow_unsigned, 1446 bfd_elf_generic_reloc, 1447 "R_NIOS2_R2_T2I4", 1448 FALSE, 1449 0xf000, 1450 0xf000, 1451 FALSE), 1452 1453 HOWTO (R_NIOS2_R2_T2I4_1, 1454 1, 1455 1, 1456 4, 1457 FALSE, 1458 12, 1459 complain_overflow_unsigned, 1460 bfd_elf_generic_reloc, 1461 "R_NIOS2_R2_T2I4_1", 1462 FALSE, 1463 0xf000, 1464 0xf000, 1465 FALSE), 1466 1467 HOWTO (R_NIOS2_R2_T2I4_2, 1468 2, 1469 1, 1470 4, 1471 FALSE, 1472 12, 1473 complain_overflow_unsigned, 1474 bfd_elf_generic_reloc, 1475 "R_NIOS2_R2_T2I4_2", 1476 FALSE, 1477 0xf000, 1478 0xf000, 1479 FALSE), 1480 1481 HOWTO (R_NIOS2_R2_X1I7_2, 1482 2, 1483 1, 1484 7, 1485 FALSE, 1486 6, 1487 complain_overflow_unsigned, 1488 bfd_elf_generic_reloc, 1489 "R_NIOS2_R2_X1I7_2", 1490 FALSE, 1491 0x1fc0, 1492 0x1fc0, 1493 FALSE), 1494 1495 HOWTO (R_NIOS2_R2_X2L5, 1496 0, 1497 1, 1498 5, 1499 FALSE, 1500 6, 1501 complain_overflow_unsigned, 1502 bfd_elf_generic_reloc, 1503 "R_NIOS2_R2_X2L5", 1504 FALSE, 1505 0x07c0, 1506 0x07c0, 1507 FALSE), 1508 1509 HOWTO (R_NIOS2_R2_F1I5_2, 1510 2, 1511 1, 1512 5, 1513 FALSE, 1514 6, 1515 complain_overflow_unsigned, 1516 bfd_elf_generic_reloc, 1517 "R_NIOS2_R2_F1L5_2", 1518 FALSE, 1519 0x07c0, 1520 0x07c0, 1521 FALSE), 1522 1523 HOWTO (R_NIOS2_R2_L5I4X1, 1524 2, 1525 1, 1526 4, 1527 FALSE, 1528 6, 1529 complain_overflow_unsigned, 1530 bfd_elf_generic_reloc, 1531 "R_NIOS2_R2_L5I4X1", 1532 FALSE, 1533 0x03c0, 1534 0x03c0, 1535 FALSE), 1536 1537 HOWTO (R_NIOS2_R2_T1X1I6, 1538 0, 1539 1, 1540 6, 1541 FALSE, 1542 9, 1543 complain_overflow_unsigned, 1544 bfd_elf_generic_reloc, 1545 "R_NIOS2_R2_T1X1I6", 1546 FALSE, 1547 0x7e00, 1548 0x7e00, 1549 FALSE), 1550 1551 HOWTO (R_NIOS2_R2_T1X1I6_2, 1552 2, 1553 2, 1554 6, 1555 FALSE, 1556 9, 1557 complain_overflow_unsigned, 1558 bfd_elf_generic_reloc, 1559 "R_NIOS2_R2_T1I1X6_2", 1560 FALSE, 1561 0x7e00, 1562 0x7e00, 1563 FALSE), 1564 1565 /* Add other relocations here. */ 1566 }; 1567 1568 static unsigned char elf_code_to_howto_index[R_NIOS2_ILLEGAL + 1]; 1569 1570 1571 /* Return true if producing output for a R2 BFD. */ 1572 #define BFD_IS_R2(abfd) (bfd_get_mach (abfd) == bfd_mach_nios2r2) 1573 1574 /* Return the howto for relocation RTYPE. */ 1575 static reloc_howto_type * 1576 lookup_howto (unsigned int rtype, bfd *abfd) 1577 { 1578 static int initialized = 0; 1579 int i; 1580 /* R2 relocations are a superset of R1, so use that for the lookup 1581 table. */ 1582 int r1_howto_tbl_size = (int) ARRAY_SIZE (elf_nios2_r1_howto_table_rel); 1583 int r2_howto_tbl_size = (int) ARRAY_SIZE (elf_nios2_r2_howto_table_rel); 1584 1585 if (!initialized) 1586 { 1587 initialized = 1; 1588 memset (elf_code_to_howto_index, 0xff, 1589 sizeof (elf_code_to_howto_index)); 1590 for (i = 0; i < r2_howto_tbl_size; i++) 1591 { 1592 elf_code_to_howto_index[elf_nios2_r2_howto_table_rel[i].type] = i; 1593 if (i < r1_howto_tbl_size) 1594 BFD_ASSERT (elf_nios2_r2_howto_table_rel[i].type 1595 == elf_nios2_r1_howto_table_rel[i].type); 1596 } 1597 } 1598 1599 if (rtype > R_NIOS2_ILLEGAL) 1600 return NULL; 1601 i = elf_code_to_howto_index[rtype]; 1602 if (BFD_IS_R2 (abfd)) 1603 { 1604 if (i >= r2_howto_tbl_size) 1605 return NULL; 1606 return elf_nios2_r2_howto_table_rel + i; 1607 } 1608 else 1609 { 1610 if (i >= r1_howto_tbl_size) 1611 return NULL; 1612 return elf_nios2_r1_howto_table_rel + i; 1613 } 1614 } 1615 1616 /* Map for converting BFD reloc types to Nios II reloc types. */ 1617 struct elf_reloc_map 1618 { 1619 bfd_reloc_code_real_type bfd_val; 1620 enum elf_nios2_reloc_type elf_val; 1621 }; 1622 1623 static const struct elf_reloc_map nios2_reloc_map[] = 1624 { 1625 {BFD_RELOC_NONE, R_NIOS2_NONE}, 1626 {BFD_RELOC_NIOS2_S16, R_NIOS2_S16}, 1627 {BFD_RELOC_NIOS2_U16, R_NIOS2_U16}, 1628 {BFD_RELOC_16_PCREL, R_NIOS2_PCREL16}, 1629 {BFD_RELOC_NIOS2_CALL26, R_NIOS2_CALL26}, 1630 {BFD_RELOC_NIOS2_IMM5, R_NIOS2_IMM5}, 1631 {BFD_RELOC_NIOS2_CACHE_OPX, R_NIOS2_CACHE_OPX}, 1632 {BFD_RELOC_NIOS2_IMM6, R_NIOS2_IMM6}, 1633 {BFD_RELOC_NIOS2_IMM8, R_NIOS2_IMM8}, 1634 {BFD_RELOC_NIOS2_HI16, R_NIOS2_HI16}, 1635 {BFD_RELOC_NIOS2_LO16, R_NIOS2_LO16}, 1636 {BFD_RELOC_NIOS2_HIADJ16, R_NIOS2_HIADJ16}, 1637 {BFD_RELOC_32, R_NIOS2_BFD_RELOC_32}, 1638 {BFD_RELOC_16, R_NIOS2_BFD_RELOC_16}, 1639 {BFD_RELOC_8, R_NIOS2_BFD_RELOC_8}, 1640 {BFD_RELOC_NIOS2_GPREL, R_NIOS2_GPREL}, 1641 {BFD_RELOC_VTABLE_INHERIT, R_NIOS2_GNU_VTINHERIT}, 1642 {BFD_RELOC_VTABLE_ENTRY, R_NIOS2_GNU_VTENTRY}, 1643 {BFD_RELOC_NIOS2_UJMP, R_NIOS2_UJMP}, 1644 {BFD_RELOC_NIOS2_CJMP, R_NIOS2_CJMP}, 1645 {BFD_RELOC_NIOS2_CALLR, R_NIOS2_CALLR}, 1646 {BFD_RELOC_NIOS2_ALIGN, R_NIOS2_ALIGN}, 1647 {BFD_RELOC_NIOS2_GOT16, R_NIOS2_GOT16}, 1648 {BFD_RELOC_NIOS2_CALL16, R_NIOS2_CALL16}, 1649 {BFD_RELOC_NIOS2_GOTOFF_LO, R_NIOS2_GOTOFF_LO}, 1650 {BFD_RELOC_NIOS2_GOTOFF_HA, R_NIOS2_GOTOFF_HA}, 1651 {BFD_RELOC_NIOS2_PCREL_LO, R_NIOS2_PCREL_LO}, 1652 {BFD_RELOC_NIOS2_PCREL_HA, R_NIOS2_PCREL_HA}, 1653 {BFD_RELOC_NIOS2_TLS_GD16, R_NIOS2_TLS_GD16}, 1654 {BFD_RELOC_NIOS2_TLS_LDM16, R_NIOS2_TLS_LDM16}, 1655 {BFD_RELOC_NIOS2_TLS_LDO16, R_NIOS2_TLS_LDO16}, 1656 {BFD_RELOC_NIOS2_TLS_IE16, R_NIOS2_TLS_IE16}, 1657 {BFD_RELOC_NIOS2_TLS_LE16, R_NIOS2_TLS_LE16}, 1658 {BFD_RELOC_NIOS2_TLS_DTPMOD, R_NIOS2_TLS_DTPMOD}, 1659 {BFD_RELOC_NIOS2_TLS_DTPREL, R_NIOS2_TLS_DTPREL}, 1660 {BFD_RELOC_NIOS2_TLS_TPREL, R_NIOS2_TLS_TPREL}, 1661 {BFD_RELOC_NIOS2_COPY, R_NIOS2_COPY}, 1662 {BFD_RELOC_NIOS2_GLOB_DAT, R_NIOS2_GLOB_DAT}, 1663 {BFD_RELOC_NIOS2_JUMP_SLOT, R_NIOS2_JUMP_SLOT}, 1664 {BFD_RELOC_NIOS2_RELATIVE, R_NIOS2_RELATIVE}, 1665 {BFD_RELOC_NIOS2_GOTOFF, R_NIOS2_GOTOFF}, 1666 {BFD_RELOC_NIOS2_CALL26_NOAT, R_NIOS2_CALL26_NOAT}, 1667 {BFD_RELOC_NIOS2_GOT_LO, R_NIOS2_GOT_LO}, 1668 {BFD_RELOC_NIOS2_GOT_HA, R_NIOS2_GOT_HA}, 1669 {BFD_RELOC_NIOS2_CALL_LO, R_NIOS2_CALL_LO}, 1670 {BFD_RELOC_NIOS2_CALL_HA, R_NIOS2_CALL_HA}, 1671 {BFD_RELOC_NIOS2_R2_S12, R_NIOS2_R2_S12}, 1672 {BFD_RELOC_NIOS2_R2_I10_1_PCREL, R_NIOS2_R2_I10_1_PCREL}, 1673 {BFD_RELOC_NIOS2_R2_T1I7_1_PCREL, R_NIOS2_R2_T1I7_1_PCREL}, 1674 {BFD_RELOC_NIOS2_R2_T1I7_2, R_NIOS2_R2_T1I7_2}, 1675 {BFD_RELOC_NIOS2_R2_T2I4, R_NIOS2_R2_T2I4}, 1676 {BFD_RELOC_NIOS2_R2_T2I4_1, R_NIOS2_R2_T2I4_1}, 1677 {BFD_RELOC_NIOS2_R2_T2I4_2, R_NIOS2_R2_T2I4_2}, 1678 {BFD_RELOC_NIOS2_R2_X1I7_2, R_NIOS2_R2_X1I7_2}, 1679 {BFD_RELOC_NIOS2_R2_X2L5, R_NIOS2_R2_X2L5}, 1680 {BFD_RELOC_NIOS2_R2_F1I5_2, R_NIOS2_R2_F1I5_2}, 1681 {BFD_RELOC_NIOS2_R2_L5I4X1, R_NIOS2_R2_L5I4X1}, 1682 {BFD_RELOC_NIOS2_R2_T1X1I6, R_NIOS2_R2_T1X1I6}, 1683 {BFD_RELOC_NIOS2_R2_T1X1I6_2, R_NIOS2_R2_T1X1I6_2}, 1684 }; 1685 1686 enum elf32_nios2_stub_type 1687 { 1688 nios2_stub_call26_before, 1689 nios2_stub_call26_after, 1690 nios2_stub_none 1691 }; 1692 1693 struct elf32_nios2_stub_hash_entry 1694 { 1695 /* Base hash table entry structure. */ 1696 struct bfd_hash_entry bh_root; 1697 1698 /* The stub section. */ 1699 asection *stub_sec; 1700 1701 /* Offset within stub_sec of the beginning of this stub. */ 1702 bfd_vma stub_offset; 1703 1704 /* Given the symbol's value and its section we can determine its final 1705 value when building the stubs (so the stub knows where to jump. */ 1706 bfd_vma target_value; 1707 asection *target_section; 1708 1709 enum elf32_nios2_stub_type stub_type; 1710 1711 /* The symbol table entry, if any, that this was derived from. */ 1712 struct elf32_nios2_link_hash_entry *hh; 1713 1714 /* And the reloc addend that this was derived from. */ 1715 bfd_vma addend; 1716 1717 /* Where this stub is being called from, or, in the case of combined 1718 stub sections, the first input section in the group. */ 1719 asection *id_sec; 1720 }; 1721 1722 #define nios2_stub_hash_entry(ent) \ 1723 ((struct elf32_nios2_stub_hash_entry *)(ent)) 1724 1725 #define nios2_stub_hash_lookup(table, string, create, copy) \ 1726 ((struct elf32_nios2_stub_hash_entry *) \ 1727 bfd_hash_lookup ((table), (string), (create), (copy))) 1728 1729 1730 /* Nios II ELF linker hash entry. */ 1731 1732 struct elf32_nios2_link_hash_entry 1733 { 1734 struct elf_link_hash_entry root; 1735 1736 /* A pointer to the most recently used stub hash entry against this 1737 symbol. */ 1738 struct elf32_nios2_stub_hash_entry *hsh_cache; 1739 1740 /* Track dynamic relocs copied for this symbol. */ 1741 struct elf_dyn_relocs *dyn_relocs; 1742 1743 #define GOT_UNKNOWN 0 1744 #define GOT_NORMAL 1 1745 #define GOT_TLS_GD 2 1746 #define GOT_TLS_IE 4 1747 unsigned char tls_type; 1748 1749 /* We need to detect and take special action for symbols which are only 1750 referenced with %call() and not with %got(). Such symbols do not need 1751 a dynamic GOT reloc in shared objects, only a dynamic PLT reloc. Lazy 1752 linking will not work if the dynamic GOT reloc exists. 1753 To check for this condition efficiently, we compare got_types_used against 1754 CALL_USED, meaning 1755 (got_types_used & (GOT_USED | CALL_USED)) == CALL_USED. 1756 */ 1757 #define GOT_USED 1 1758 #define CALL_USED 2 1759 unsigned char got_types_used; 1760 }; 1761 1762 #define elf32_nios2_hash_entry(ent) \ 1763 ((struct elf32_nios2_link_hash_entry *) (ent)) 1764 1765 /* Get the Nios II elf linker hash table from a link_info structure. */ 1766 #define elf32_nios2_hash_table(info) \ 1767 ((struct elf32_nios2_link_hash_table *) ((info)->hash)) 1768 1769 /* Nios II ELF linker hash table. */ 1770 struct elf32_nios2_link_hash_table 1771 { 1772 /* The main hash table. */ 1773 struct elf_link_hash_table root; 1774 1775 /* The stub hash table. */ 1776 struct bfd_hash_table bstab; 1777 1778 /* Linker stub bfd. */ 1779 bfd *stub_bfd; 1780 1781 /* Linker call-backs. */ 1782 asection * (*add_stub_section) (const char *, asection *, bfd_boolean); 1783 void (*layout_sections_again) (void); 1784 1785 /* Array to keep track of which stub sections have been created, and 1786 information on stub grouping. */ 1787 struct map_stub 1788 { 1789 /* These are the section to which stubs in the group will be 1790 attached. */ 1791 asection *first_sec, *last_sec; 1792 /* The stub sections. There might be stubs inserted either before 1793 or after the real section.*/ 1794 asection *first_stub_sec, *last_stub_sec; 1795 } *stub_group; 1796 1797 /* Assorted information used by nios2_elf32_size_stubs. */ 1798 unsigned int bfd_count; 1799 unsigned int top_index; 1800 asection **input_list; 1801 Elf_Internal_Sym **all_local_syms; 1802 1803 /* Short-cuts to get to dynamic linker sections. */ 1804 asection *sbss; 1805 1806 /* GOT pointer symbol _gp_got. */ 1807 struct elf_link_hash_entry *h_gp_got; 1808 1809 union { 1810 bfd_signed_vma refcount; 1811 bfd_vma offset; 1812 } tls_ldm_got; 1813 1814 /* Small local sym cache. */ 1815 struct sym_cache sym_cache; 1816 1817 bfd_vma res_n_size; 1818 }; 1819 1820 struct nios2_elf32_obj_tdata 1821 { 1822 struct elf_obj_tdata root; 1823 1824 /* tls_type for each local got entry. */ 1825 char *local_got_tls_type; 1826 1827 /* TRUE if TLS GD relocs have been seen for this object. */ 1828 bfd_boolean has_tlsgd; 1829 }; 1830 1831 #define elf32_nios2_tdata(abfd) \ 1832 ((struct nios2_elf32_obj_tdata *) (abfd)->tdata.any) 1833 1834 #define elf32_nios2_local_got_tls_type(abfd) \ 1835 (elf32_nios2_tdata (abfd)->local_got_tls_type) 1836 1837 /* The name of the dynamic interpreter. This is put in the .interp 1838 section. */ 1839 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1" 1840 1841 /* PLT implementation for position-dependent code. */ 1842 static const bfd_vma nios2_plt_entry[] = { /* .PLTn: */ 1843 0x03c00034, /* movhi r15, %hiadj(plt_got_slot_address) */ 1844 0x7bc00017, /* ldw r15, %lo(plt_got_slot_address)(r15) */ 1845 0x7800683a /* jmp r15 */ 1846 }; 1847 1848 static const bfd_vma nios2_plt0_entry[] = { /* .PLTresolve */ 1849 0x03800034, /* movhi r14, %hiadj(res_0) */ 1850 0x73800004, /* addi r14, r14, %lo(res_0) */ 1851 0x7b9fc83a, /* sub r15, r15, r14 */ 1852 0x03400034, /* movhi r13, %hiadj(_GLOBAL_OFFSET_TABLE_) */ 1853 0x6b800017, /* ldw r14, %lo(_GLOBAL_OFFSET_TABLE_+4)(r13) */ 1854 0x6b400017, /* ldw r13, %lo(_GLOBAL_OFFSET_TABLE_+8)(r13) */ 1855 0x6800683a /* jmp r13 */ 1856 }; 1857 1858 /* PLT implementation for position-independent code. */ 1859 static const bfd_vma nios2_so_plt_entry[] = { /* .PLTn */ 1860 0x03c00034, /* movhi r15, %hiadj(index * 4) */ 1861 0x7bc00004, /* addi r15, r15, %lo(index * 4) */ 1862 0x00000006 /* br .PLTresolve */ 1863 }; 1864 1865 static const bfd_vma nios2_so_plt0_entry[] = { /* .PLTresolve */ 1866 0x001ce03a, /* nextpc r14 */ 1867 0x03400034, /* movhi r13, %hiadj(_GLOBAL_OFFSET_TABLE_) */ 1868 0x6b9b883a, /* add r13, r13, r14 */ 1869 0x6b800017, /* ldw r14, %lo(_GLOBAL_OFFSET_TABLE_+4)(r13) */ 1870 0x6b400017, /* ldw r13, %lo(_GLOBAL_OFFSET_TABLE_+8)(r13) */ 1871 0x6800683a /* jmp r13 */ 1872 }; 1873 1874 /* CALL26 stub. */ 1875 static const bfd_vma nios2_call26_stub_entry[] = { 1876 0x00400034, /* orhi at, r0, %hiadj(dest) */ 1877 0x08400004, /* addi at, at, %lo(dest) */ 1878 0x0800683a /* jmp at */ 1879 }; 1880 1881 /* Install 16-bit immediate value VALUE at offset OFFSET into section SEC. */ 1882 static void 1883 nios2_elf32_install_imm16 (asection *sec, bfd_vma offset, bfd_vma value) 1884 { 1885 bfd_vma word = bfd_get_32 (sec->owner, sec->contents + offset); 1886 1887 BFD_ASSERT (value <= 0xffff || ((bfd_signed_vma) value) >= -0xffff); 1888 1889 bfd_put_32 (sec->owner, word | ((value & 0xffff) << 6), 1890 sec->contents + offset); 1891 } 1892 1893 /* Install COUNT 32-bit values DATA starting at offset OFFSET into 1894 section SEC. */ 1895 static void 1896 nios2_elf32_install_data (asection *sec, const bfd_vma *data, bfd_vma offset, 1897 int count) 1898 { 1899 while (count--) 1900 { 1901 bfd_put_32 (sec->owner, *data, sec->contents + offset); 1902 offset += 4; 1903 ++data; 1904 } 1905 } 1906 1907 /* The usual way of loading a 32-bit constant into a Nios II register is to 1908 load the high 16 bits in one instruction and then add the low 16 bits with 1909 a signed add. This means that the high halfword needs to be adjusted to 1910 compensate for the sign bit of the low halfword. This function returns the 1911 adjusted high halfword for a given 32-bit constant. */ 1912 static 1913 bfd_vma hiadj (bfd_vma symbol_value) 1914 { 1915 return ((symbol_value + 0x8000) >> 16) & 0xffff; 1916 } 1917 1918 /* Implement elf_backend_grok_prstatus: 1919 Support for core dump NOTE sections. */ 1920 static bfd_boolean 1921 nios2_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) 1922 { 1923 int offset; 1924 size_t size; 1925 1926 switch (note->descsz) 1927 { 1928 default: 1929 return FALSE; 1930 1931 case 212: /* Linux/Nios II */ 1932 /* pr_cursig */ 1933 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); 1934 1935 /* pr_pid */ 1936 elf_tdata (abfd)->core->pid = bfd_get_32 (abfd, note->descdata + 24); 1937 1938 /* pr_reg */ 1939 offset = 72; 1940 size = 136; 1941 1942 break; 1943 } 1944 1945 /* Make a ".reg/999" section. */ 1946 return _bfd_elfcore_make_pseudosection (abfd, ".reg", 1947 size, note->descpos + offset); 1948 } 1949 1950 /* Implement elf_backend_grok_psinfo. */ 1951 static bfd_boolean 1952 nios2_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) 1953 { 1954 switch (note->descsz) 1955 { 1956 default: 1957 return FALSE; 1958 1959 case 124: /* Linux/Nios II elf_prpsinfo */ 1960 elf_tdata (abfd)->core->program 1961 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); 1962 elf_tdata (abfd)->core->command 1963 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); 1964 } 1965 1966 /* Note that for some reason, a spurious space is tacked 1967 onto the end of the args in some (at least one anyway) 1968 implementations, so strip it off if it exists. */ 1969 1970 { 1971 char *command = elf_tdata (abfd)->core->command; 1972 int n = strlen (command); 1973 1974 if (0 < n && command[n - 1] == ' ') 1975 command[n - 1] = '\0'; 1976 } 1977 1978 return TRUE; 1979 } 1980 1981 /* Assorted hash table functions. */ 1982 1983 /* Initialize an entry in the stub hash table. */ 1984 static struct bfd_hash_entry * 1985 stub_hash_newfunc (struct bfd_hash_entry *entry, 1986 struct bfd_hash_table *table, 1987 const char *string) 1988 { 1989 /* Allocate the structure if it has not already been allocated by a 1990 subclass. */ 1991 if (entry == NULL) 1992 { 1993 entry = bfd_hash_allocate (table, 1994 sizeof (struct elf32_nios2_stub_hash_entry)); 1995 if (entry == NULL) 1996 return entry; 1997 } 1998 1999 /* Call the allocation method of the superclass. */ 2000 entry = bfd_hash_newfunc (entry, table, string); 2001 if (entry != NULL) 2002 { 2003 struct elf32_nios2_stub_hash_entry *hsh; 2004 2005 /* Initialize the local fields. */ 2006 hsh = (struct elf32_nios2_stub_hash_entry *) entry; 2007 hsh->stub_sec = NULL; 2008 hsh->stub_offset = 0; 2009 hsh->target_value = 0; 2010 hsh->target_section = NULL; 2011 hsh->stub_type = nios2_stub_none; 2012 hsh->hh = NULL; 2013 hsh->id_sec = NULL; 2014 } 2015 2016 return entry; 2017 } 2018 2019 /* Create an entry in a Nios II ELF linker hash table. */ 2020 static struct bfd_hash_entry * 2021 link_hash_newfunc (struct bfd_hash_entry *entry, 2022 struct bfd_hash_table *table, const char *string) 2023 { 2024 /* Allocate the structure if it has not already been allocated by a 2025 subclass. */ 2026 if (entry == NULL) 2027 { 2028 entry = bfd_hash_allocate (table, 2029 sizeof (struct elf32_nios2_link_hash_entry)); 2030 if (entry == NULL) 2031 return entry; 2032 } 2033 2034 /* Call the allocation method of the superclass. */ 2035 entry = _bfd_elf_link_hash_newfunc (entry, table, string); 2036 if (entry) 2037 { 2038 struct elf32_nios2_link_hash_entry *eh; 2039 2040 eh = (struct elf32_nios2_link_hash_entry *) entry; 2041 eh->hsh_cache = NULL; 2042 eh->dyn_relocs = NULL; 2043 eh->tls_type = GOT_UNKNOWN; 2044 eh->got_types_used = 0; 2045 } 2046 2047 return entry; 2048 } 2049 2050 /* Section name for stubs is the associated section name plus this 2051 string. */ 2052 #define STUB_SUFFIX ".stub" 2053 2054 /* Build a name for an entry in the stub hash table. */ 2055 static char * 2056 nios2_stub_name (const asection *input_section, 2057 const asection *sym_sec, 2058 const struct elf32_nios2_link_hash_entry *hh, 2059 const Elf_Internal_Rela *rel, 2060 enum elf32_nios2_stub_type stub_type) 2061 { 2062 char *stub_name; 2063 bfd_size_type len; 2064 char stubpos = (stub_type == nios2_stub_call26_before) ? 'b' : 'a'; 2065 2066 if (hh) 2067 { 2068 len = 8 + 1 + 1 + 1+ strlen (hh->root.root.root.string) + 1 + 8 + 1; 2069 stub_name = bfd_malloc (len); 2070 if (stub_name != NULL) 2071 { 2072 sprintf (stub_name, "%08x_%c_%s+%x", 2073 input_section->id & 0xffffffff, 2074 stubpos, 2075 hh->root.root.root.string, 2076 (int) rel->r_addend & 0xffffffff); 2077 } 2078 } 2079 else 2080 { 2081 len = 8 + 1 + 1 + 1+ 8 + 1 + 8 + 1 + 8 + 1; 2082 stub_name = bfd_malloc (len); 2083 if (stub_name != NULL) 2084 { 2085 sprintf (stub_name, "%08x_%c_%x:%x+%x", 2086 input_section->id & 0xffffffff, 2087 stubpos, 2088 sym_sec->id & 0xffffffff, 2089 (int) ELF32_R_SYM (rel->r_info) & 0xffffffff, 2090 (int) rel->r_addend & 0xffffffff); 2091 } 2092 } 2093 return stub_name; 2094 } 2095 2096 /* Look up an entry in the stub hash. Stub entries are cached because 2097 creating the stub name takes a bit of time. */ 2098 static struct elf32_nios2_stub_hash_entry * 2099 nios2_get_stub_entry (const asection *input_section, 2100 const asection *sym_sec, 2101 struct elf32_nios2_link_hash_entry *hh, 2102 const Elf_Internal_Rela *rel, 2103 struct elf32_nios2_link_hash_table *htab, 2104 enum elf32_nios2_stub_type stub_type) 2105 { 2106 struct elf32_nios2_stub_hash_entry *hsh; 2107 const asection *id_sec; 2108 2109 /* If this input section is part of a group of sections sharing one 2110 stub section, then use the id of the first/last section in the group, 2111 depending on the stub section placement relative to the group. 2112 Stub names need to include a section id, as there may well be 2113 more than one stub used to reach say, printf, and we need to 2114 distinguish between them. */ 2115 if (stub_type == nios2_stub_call26_before) 2116 id_sec = htab->stub_group[input_section->id].first_sec; 2117 else 2118 id_sec = htab->stub_group[input_section->id].last_sec; 2119 2120 if (hh != NULL && hh->hsh_cache != NULL 2121 && hh->hsh_cache->hh == hh 2122 && hh->hsh_cache->id_sec == id_sec 2123 && hh->hsh_cache->stub_type == stub_type) 2124 { 2125 hsh = hh->hsh_cache; 2126 } 2127 else 2128 { 2129 char *stub_name; 2130 2131 stub_name = nios2_stub_name (id_sec, sym_sec, hh, rel, stub_type); 2132 if (stub_name == NULL) 2133 return NULL; 2134 2135 hsh = nios2_stub_hash_lookup (&htab->bstab, 2136 stub_name, FALSE, FALSE); 2137 2138 if (hh != NULL) 2139 hh->hsh_cache = hsh; 2140 2141 free (stub_name); 2142 } 2143 2144 return hsh; 2145 } 2146 2147 /* Add a new stub entry to the stub hash. Not all fields of the new 2148 stub entry are initialised. */ 2149 static struct elf32_nios2_stub_hash_entry * 2150 nios2_add_stub (const char *stub_name, 2151 asection *section, 2152 struct elf32_nios2_link_hash_table *htab, 2153 enum elf32_nios2_stub_type stub_type) 2154 { 2155 asection *link_sec; 2156 asection *stub_sec; 2157 asection **secptr, **linkptr; 2158 struct elf32_nios2_stub_hash_entry *hsh; 2159 bfd_boolean afterp; 2160 2161 if (stub_type == nios2_stub_call26_before) 2162 { 2163 link_sec = htab->stub_group[section->id].first_sec; 2164 secptr = &(htab->stub_group[section->id].first_stub_sec); 2165 linkptr = &(htab->stub_group[link_sec->id].first_stub_sec); 2166 afterp = FALSE; 2167 } 2168 else 2169 { 2170 link_sec = htab->stub_group[section->id].last_sec; 2171 secptr = &(htab->stub_group[section->id].last_stub_sec); 2172 linkptr = &(htab->stub_group[link_sec->id].last_stub_sec); 2173 afterp = TRUE; 2174 } 2175 stub_sec = *secptr; 2176 if (stub_sec == NULL) 2177 { 2178 stub_sec = *linkptr; 2179 if (stub_sec == NULL) 2180 { 2181 size_t namelen; 2182 bfd_size_type len; 2183 char *s_name; 2184 2185 namelen = strlen (link_sec->name); 2186 len = namelen + sizeof (STUB_SUFFIX); 2187 s_name = bfd_alloc (htab->stub_bfd, len); 2188 if (s_name == NULL) 2189 return NULL; 2190 2191 memcpy (s_name, link_sec->name, namelen); 2192 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX)); 2193 2194 stub_sec = (*htab->add_stub_section) (s_name, link_sec, afterp); 2195 if (stub_sec == NULL) 2196 return NULL; 2197 *linkptr = stub_sec; 2198 } 2199 *secptr = stub_sec; 2200 } 2201 2202 /* Enter this entry into the linker stub hash table. */ 2203 hsh = nios2_stub_hash_lookup (&htab->bstab, stub_name, 2204 TRUE, FALSE); 2205 if (hsh == NULL) 2206 { 2207 /* xgettext:c-format */ 2208 _bfd_error_handler (_("%pB: cannot create stub entry %s"), 2209 section->owner, 2210 stub_name); 2211 return NULL; 2212 } 2213 2214 hsh->stub_sec = stub_sec; 2215 hsh->stub_offset = 0; 2216 hsh->id_sec = link_sec; 2217 return hsh; 2218 } 2219 2220 /* Set up various things so that we can make a list of input sections 2221 for each output section included in the link. Returns -1 on error, 2222 0 when no stubs will be needed, and 1 on success. */ 2223 int 2224 nios2_elf32_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info) 2225 { 2226 bfd *input_bfd; 2227 unsigned int bfd_count; 2228 unsigned int top_id, top_index; 2229 asection *section; 2230 asection **input_list, **list; 2231 bfd_size_type amt; 2232 struct elf32_nios2_link_hash_table *htab = elf32_nios2_hash_table (info); 2233 2234 /* Count the number of input BFDs and find the top input section id. */ 2235 for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0; 2236 input_bfd != NULL; 2237 input_bfd = input_bfd->link.next) 2238 { 2239 bfd_count += 1; 2240 for (section = input_bfd->sections; 2241 section != NULL; 2242 section = section->next) 2243 { 2244 if (top_id < section->id) 2245 top_id = section->id; 2246 } 2247 } 2248 2249 htab->bfd_count = bfd_count; 2250 2251 amt = sizeof (struct map_stub) * (top_id + 1); 2252 htab->stub_group = bfd_zmalloc (amt); 2253 if (htab->stub_group == NULL) 2254 return -1; 2255 2256 /* We can't use output_bfd->section_count here to find the top output 2257 section index as some sections may have been removed, and 2258 strip_excluded_output_sections doesn't renumber the indices. */ 2259 for (section = output_bfd->sections, top_index = 0; 2260 section != NULL; 2261 section = section->next) 2262 { 2263 if (top_index < section->index) 2264 top_index = section->index; 2265 } 2266 2267 htab->top_index = top_index; 2268 amt = sizeof (asection *) * (top_index + 1); 2269 input_list = bfd_malloc (amt); 2270 htab->input_list = input_list; 2271 if (input_list == NULL) 2272 return -1; 2273 2274 /* For sections we aren't interested in, mark their entries with a 2275 value we can check later. */ 2276 list = input_list + top_index; 2277 do 2278 *list = bfd_abs_section_ptr; 2279 while (list-- != input_list); 2280 2281 for (section = output_bfd->sections; 2282 section != NULL; 2283 section = section->next) 2284 { 2285 /* FIXME: This is a bit of hack. Currently our .ctors and .dtors 2286 * have PC relative relocs in them but no code flag set. */ 2287 if (((section->flags & SEC_CODE) != 0) || 2288 strcmp(".ctors", section->name) || 2289 strcmp(".dtors", section->name)) 2290 input_list[section->index] = NULL; 2291 } 2292 2293 return 1; 2294 } 2295 2296 /* The linker repeatedly calls this function for each input section, 2297 in the order that input sections are linked into output sections. 2298 Build lists of input sections to determine groupings between which 2299 we may insert linker stubs. */ 2300 void 2301 nios2_elf32_next_input_section (struct bfd_link_info *info, asection *isec) 2302 { 2303 struct elf32_nios2_link_hash_table *htab = elf32_nios2_hash_table (info); 2304 2305 if (isec->output_section->index <= htab->top_index) 2306 { 2307 asection **list = htab->input_list + isec->output_section->index; 2308 if (*list != bfd_abs_section_ptr) 2309 { 2310 /* Steal the last_sec pointer for our list. 2311 This happens to make the list in reverse order, 2312 which is what we want. */ 2313 htab->stub_group[isec->id].last_sec = *list; 2314 *list = isec; 2315 } 2316 } 2317 } 2318 2319 /* Segment mask for CALL26 relocation relaxation. */ 2320 #define CALL26_SEGMENT(x) ((x) & 0xf0000000) 2321 2322 /* Fudge factor for approximate maximum size of all stubs that might 2323 be inserted by the linker. This does not actually limit the number 2324 of stubs that might be inserted, and only affects strategy for grouping 2325 and placement of stubs. Perhaps this should be computed based on number 2326 of relocations seen, or be specifiable on the command line. */ 2327 #define MAX_STUB_SECTION_SIZE 0xffff 2328 2329 /* See whether we can group stub sections together. Grouping stub 2330 sections may result in fewer stubs. More importantly, we need to 2331 put all .init* and .fini* stubs at the end of the .init or 2332 .fini output sections respectively, because glibc splits the 2333 _init and _fini functions into multiple parts. Putting a stub in 2334 the middle of a function is not a good idea. 2335 Rather than computing groups of a maximum fixed size, for Nios II 2336 CALL26 relaxation it makes more sense to compute the groups based on 2337 sections that fit within a 256MB address segment. Also do not allow 2338 a group to span more than one output section, since different output 2339 sections might correspond to different memory banks on a bare-metal 2340 target, etc. */ 2341 static void 2342 group_sections (struct elf32_nios2_link_hash_table *htab) 2343 { 2344 asection **list = htab->input_list + htab->top_index; 2345 do 2346 { 2347 /* The list is in reverse order so we'll search backwards looking 2348 for the first section that begins in the same memory segment, 2349 marking sections along the way to point at the tail for this 2350 group. */ 2351 asection *tail = *list; 2352 if (tail == bfd_abs_section_ptr) 2353 continue; 2354 while (tail != NULL) 2355 { 2356 bfd_vma start = tail->output_section->vma + tail->output_offset; 2357 bfd_vma end = start + tail->size; 2358 bfd_vma segment = CALL26_SEGMENT (end); 2359 asection *prev; 2360 2361 if (segment != CALL26_SEGMENT (start) 2362 || segment != CALL26_SEGMENT (end + MAX_STUB_SECTION_SIZE)) 2363 /* This section spans more than one memory segment, or is 2364 close enough to the end of the segment that adding stub 2365 sections before it might cause it to move so that it 2366 spans memory segments, or that stubs added at the end of 2367 this group might overflow into the next memory segment. 2368 Put it in a group by itself to localize the effects. */ 2369 { 2370 prev = htab->stub_group[tail->id].last_sec; 2371 htab->stub_group[tail->id].last_sec = tail; 2372 htab->stub_group[tail->id].first_sec = tail; 2373 } 2374 else 2375 /* Collect more sections for this group. */ 2376 { 2377 asection *curr, *first; 2378 for (curr = tail; ; curr = prev) 2379 { 2380 prev = htab->stub_group[curr->id].last_sec; 2381 if (!prev 2382 || tail->output_section != prev->output_section 2383 || (CALL26_SEGMENT (prev->output_section->vma 2384 + prev->output_offset) 2385 != segment)) 2386 break; 2387 } 2388 first = curr; 2389 for (curr = tail; ; curr = prev) 2390 { 2391 prev = htab->stub_group[curr->id].last_sec; 2392 htab->stub_group[curr->id].last_sec = tail; 2393 htab->stub_group[curr->id].first_sec = first; 2394 if (curr == first) 2395 break; 2396 } 2397 } 2398 2399 /* Reset tail for the next group. */ 2400 tail = prev; 2401 } 2402 } 2403 while (list-- != htab->input_list); 2404 free (htab->input_list); 2405 } 2406 2407 /* Determine the type of stub needed, if any, for a call. */ 2408 static enum elf32_nios2_stub_type 2409 nios2_type_of_stub (asection *input_sec, 2410 const Elf_Internal_Rela *rel, 2411 struct elf32_nios2_link_hash_entry *hh, 2412 struct elf32_nios2_link_hash_table *htab, 2413 bfd_vma destination, 2414 struct bfd_link_info *info ATTRIBUTE_UNUSED) 2415 { 2416 bfd_vma location, segment, start, end; 2417 asection *s0, *s1, *s; 2418 2419 if (hh != NULL && 2420 !(hh->root.root.type == bfd_link_hash_defined 2421 || hh->root.root.type == bfd_link_hash_defweak)) 2422 return nios2_stub_none; 2423 2424 /* Determine where the call point is. */ 2425 location = (input_sec->output_section->vma 2426 + input_sec->output_offset + rel->r_offset); 2427 segment = CALL26_SEGMENT (location); 2428 2429 /* Nios II CALL and JMPI instructions can transfer control to addresses 2430 within the same 256MB segment as the PC. */ 2431 if (segment == CALL26_SEGMENT (destination)) 2432 return nios2_stub_none; 2433 2434 /* Find the start and end addresses of the stub group. Also account for 2435 any already-created stub sections for this group. Note that for stubs 2436 in the end section, only the first instruction of the last stub 2437 (12 bytes long) needs to be within range. */ 2438 s0 = htab->stub_group[input_sec->id].first_sec; 2439 s = htab->stub_group[s0->id].first_stub_sec; 2440 if (s != NULL && s->size > 0) 2441 start = s->output_section->vma + s->output_offset; 2442 else 2443 start = s0->output_section->vma + s0->output_offset; 2444 2445 s1 = htab->stub_group[input_sec->id].last_sec; 2446 s = htab->stub_group[s1->id].last_stub_sec; 2447 if (s != NULL && s->size > 0) 2448 end = s->output_section->vma + s->output_offset + s->size - 8; 2449 else 2450 end = s1->output_section->vma + s1->output_offset + s1->size; 2451 2452 BFD_ASSERT (start < end); 2453 BFD_ASSERT (start <= location); 2454 BFD_ASSERT (location < end); 2455 2456 /* Put stubs at the end of the group unless that is not a valid 2457 location and the beginning of the group is. It might be that 2458 neither the beginning nor end works if we have an input section 2459 so large that it spans multiple segment boundaries. In that 2460 case, punt; the end result will be a relocation overflow error no 2461 matter what we do here. 2462 2463 Note that adding stubs pushes up the addresses of all subsequent 2464 sections, so that stubs allocated on one pass through the 2465 relaxation loop may not be valid on the next pass. (E.g., we may 2466 allocate a stub at the beginning of the section on one pass and 2467 find that the call site has been bumped into the next memory 2468 segment on the next pass.) The important thing to note is that 2469 we never try to reclaim the space allocated to such unused stubs, 2470 so code size and section addresses can only increase with each 2471 iteration. Accounting for the start and end addresses of the 2472 already-created stub sections ensures that when the algorithm 2473 converges, it converges accurately, with the entire appropriate 2474 stub section accessible from the call site and not just the 2475 address at the start or end of the stub group proper. */ 2476 2477 if (segment == CALL26_SEGMENT (end)) 2478 return nios2_stub_call26_after; 2479 else if (segment == CALL26_SEGMENT (start)) 2480 return nios2_stub_call26_before; 2481 else 2482 /* Perhaps this should be a dedicated error code. */ 2483 return nios2_stub_none; 2484 } 2485 2486 static bfd_boolean 2487 nios2_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED) 2488 { 2489 struct elf32_nios2_stub_hash_entry *hsh 2490 = (struct elf32_nios2_stub_hash_entry *) gen_entry; 2491 asection *stub_sec = hsh->stub_sec; 2492 bfd_vma sym_value; 2493 2494 /* Make a note of the offset within the stubs for this entry. */ 2495 hsh->stub_offset = stub_sec->size; 2496 2497 switch (hsh->stub_type) 2498 { 2499 case nios2_stub_call26_before: 2500 case nios2_stub_call26_after: 2501 /* A call26 stub looks like: 2502 orhi at, %hiadj(dest) 2503 addi at, at, %lo(dest) 2504 jmp at 2505 Note that call/jmpi instructions can't be used in PIC code 2506 so there is no reason for the stub to be PIC, either. */ 2507 sym_value = (hsh->target_value 2508 + hsh->target_section->output_offset 2509 + hsh->target_section->output_section->vma 2510 + hsh->addend); 2511 2512 nios2_elf32_install_data (stub_sec, nios2_call26_stub_entry, 2513 hsh->stub_offset, 3); 2514 nios2_elf32_install_imm16 (stub_sec, hsh->stub_offset, 2515 hiadj (sym_value)); 2516 nios2_elf32_install_imm16 (stub_sec, hsh->stub_offset + 4, 2517 (sym_value & 0xffff)); 2518 stub_sec->size += 12; 2519 break; 2520 default: 2521 BFD_FAIL (); 2522 return FALSE; 2523 } 2524 2525 return TRUE; 2526 } 2527 2528 /* As above, but don't actually build the stub. Just bump offset so 2529 we know stub section sizes. */ 2530 static bfd_boolean 2531 nios2_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED) 2532 { 2533 struct elf32_nios2_stub_hash_entry *hsh 2534 = (struct elf32_nios2_stub_hash_entry *) gen_entry; 2535 2536 switch (hsh->stub_type) 2537 { 2538 case nios2_stub_call26_before: 2539 case nios2_stub_call26_after: 2540 hsh->stub_sec->size += 12; 2541 break; 2542 default: 2543 BFD_FAIL (); 2544 return FALSE; 2545 } 2546 return TRUE; 2547 } 2548 2549 /* Read in all local syms for all input bfds. 2550 Returns -1 on error, 0 otherwise. */ 2551 2552 static int 2553 get_local_syms (bfd *output_bfd ATTRIBUTE_UNUSED, bfd *input_bfd, 2554 struct bfd_link_info *info) 2555 { 2556 unsigned int bfd_indx; 2557 Elf_Internal_Sym *local_syms, **all_local_syms; 2558 struct elf32_nios2_link_hash_table *htab = elf32_nios2_hash_table (info); 2559 2560 /* We want to read in symbol extension records only once. To do this 2561 we need to read in the local symbols in parallel and save them for 2562 later use; so hold pointers to the local symbols in an array. */ 2563 bfd_size_type amt = sizeof (Elf_Internal_Sym *) * htab->bfd_count; 2564 all_local_syms = bfd_zmalloc (amt); 2565 htab->all_local_syms = all_local_syms; 2566 if (all_local_syms == NULL) 2567 return -1; 2568 2569 /* Walk over all the input BFDs, swapping in local symbols. */ 2570 for (bfd_indx = 0; 2571 input_bfd != NULL; 2572 input_bfd = input_bfd->link.next, bfd_indx++) 2573 { 2574 Elf_Internal_Shdr *symtab_hdr; 2575 2576 /* We'll need the symbol table in a second. */ 2577 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; 2578 if (symtab_hdr->sh_info == 0) 2579 continue; 2580 2581 /* We need an array of the local symbols attached to the input bfd. */ 2582 local_syms = (Elf_Internal_Sym *) symtab_hdr->contents; 2583 if (local_syms == NULL) 2584 { 2585 local_syms = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, 2586 symtab_hdr->sh_info, 0, 2587 NULL, NULL, NULL); 2588 /* Cache them for elf_link_input_bfd. */ 2589 symtab_hdr->contents = (unsigned char *) local_syms; 2590 } 2591 if (local_syms == NULL) 2592 return -1; 2593 2594 all_local_syms[bfd_indx] = local_syms; 2595 } 2596 2597 return 0; 2598 } 2599 2600 /* Determine and set the size of the stub section for a final link. */ 2601 bfd_boolean 2602 nios2_elf32_size_stubs (bfd *output_bfd, bfd *stub_bfd, 2603 struct bfd_link_info *info, 2604 asection *(*add_stub_section) (const char *, 2605 asection *, bfd_boolean), 2606 void (*layout_sections_again) (void)) 2607 { 2608 bfd_boolean stub_changed = FALSE; 2609 struct elf32_nios2_link_hash_table *htab = elf32_nios2_hash_table (info); 2610 2611 /* Stash our params away. */ 2612 htab->stub_bfd = stub_bfd; 2613 htab->add_stub_section = add_stub_section; 2614 htab->layout_sections_again = layout_sections_again; 2615 2616 /* FIXME: We only compute the section groups once. This could cause 2617 problems if adding a large stub section causes following sections, 2618 or parts of them, to move into another segment. However, this seems 2619 to be consistent with the way other back ends handle this.... */ 2620 group_sections (htab); 2621 2622 if (get_local_syms (output_bfd, info->input_bfds, info)) 2623 { 2624 if (htab->all_local_syms) 2625 goto error_ret_free_local; 2626 return FALSE; 2627 } 2628 2629 while (1) 2630 { 2631 bfd *input_bfd; 2632 unsigned int bfd_indx; 2633 asection *stub_sec; 2634 2635 for (input_bfd = info->input_bfds, bfd_indx = 0; 2636 input_bfd != NULL; 2637 input_bfd = input_bfd->link.next, bfd_indx++) 2638 { 2639 Elf_Internal_Shdr *symtab_hdr; 2640 asection *section; 2641 Elf_Internal_Sym *local_syms; 2642 2643 /* We'll need the symbol table in a second. */ 2644 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; 2645 if (symtab_hdr->sh_info == 0) 2646 continue; 2647 2648 local_syms = htab->all_local_syms[bfd_indx]; 2649 2650 /* Walk over each section attached to the input bfd. */ 2651 for (section = input_bfd->sections; 2652 section != NULL; 2653 section = section->next) 2654 { 2655 Elf_Internal_Rela *internal_relocs, *irelaend, *irela; 2656 2657 /* If there aren't any relocs, then there's nothing more 2658 to do. */ 2659 if ((section->flags & SEC_RELOC) == 0 2660 || section->reloc_count == 0) 2661 continue; 2662 2663 /* If this section is a link-once section that will be 2664 discarded, then don't create any stubs. */ 2665 if (section->output_section == NULL 2666 || section->output_section->owner != output_bfd) 2667 continue; 2668 2669 /* Get the relocs. */ 2670 internal_relocs 2671 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL, 2672 info->keep_memory); 2673 if (internal_relocs == NULL) 2674 goto error_ret_free_local; 2675 2676 /* Now examine each relocation. */ 2677 irela = internal_relocs; 2678 irelaend = irela + section->reloc_count; 2679 for (; irela < irelaend; irela++) 2680 { 2681 unsigned int r_type, r_indx; 2682 enum elf32_nios2_stub_type stub_type; 2683 struct elf32_nios2_stub_hash_entry *hsh; 2684 asection *sym_sec; 2685 bfd_vma sym_value; 2686 bfd_vma destination; 2687 struct elf32_nios2_link_hash_entry *hh; 2688 char *stub_name; 2689 const asection *id_sec; 2690 2691 r_type = ELF32_R_TYPE (irela->r_info); 2692 r_indx = ELF32_R_SYM (irela->r_info); 2693 2694 if (r_type >= (unsigned int) R_NIOS2_ILLEGAL) 2695 { 2696 bfd_set_error (bfd_error_bad_value); 2697 error_ret_free_internal: 2698 if (elf_section_data (section)->relocs == NULL) 2699 free (internal_relocs); 2700 goto error_ret_free_local; 2701 } 2702 2703 /* Only look for stubs on CALL and JMPI instructions. */ 2704 if (r_type != (unsigned int) R_NIOS2_CALL26) 2705 continue; 2706 2707 /* Now determine the call target, its name, value, 2708 section. */ 2709 sym_sec = NULL; 2710 sym_value = 0; 2711 destination = 0; 2712 hh = NULL; 2713 if (r_indx < symtab_hdr->sh_info) 2714 { 2715 /* It's a local symbol. */ 2716 Elf_Internal_Sym *sym; 2717 Elf_Internal_Shdr *hdr; 2718 unsigned int shndx; 2719 2720 sym = local_syms + r_indx; 2721 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION) 2722 sym_value = sym->st_value; 2723 shndx = sym->st_shndx; 2724 if (shndx < elf_numsections (input_bfd)) 2725 { 2726 hdr = elf_elfsections (input_bfd)[shndx]; 2727 sym_sec = hdr->bfd_section; 2728 destination = (sym_value + irela->r_addend 2729 + sym_sec->output_offset 2730 + sym_sec->output_section->vma); 2731 } 2732 } 2733 else 2734 { 2735 /* It's an external symbol. */ 2736 int e_indx; 2737 2738 e_indx = r_indx - symtab_hdr->sh_info; 2739 hh = ((struct elf32_nios2_link_hash_entry *) 2740 elf_sym_hashes (input_bfd)[e_indx]); 2741 2742 while (hh->root.root.type == bfd_link_hash_indirect 2743 || hh->root.root.type == bfd_link_hash_warning) 2744 hh = ((struct elf32_nios2_link_hash_entry *) 2745 hh->root.root.u.i.link); 2746 2747 if (hh->root.root.type == bfd_link_hash_defined 2748 || hh->root.root.type == bfd_link_hash_defweak) 2749 { 2750 sym_sec = hh->root.root.u.def.section; 2751 sym_value = hh->root.root.u.def.value; 2752 2753 if (sym_sec->output_section != NULL) 2754 destination = (sym_value + irela->r_addend 2755 + sym_sec->output_offset 2756 + sym_sec->output_section->vma); 2757 else 2758 continue; 2759 } 2760 else if (hh->root.root.type == bfd_link_hash_undefweak) 2761 { 2762 if (! bfd_link_pic (info)) 2763 continue; 2764 } 2765 else if (hh->root.root.type == bfd_link_hash_undefined) 2766 { 2767 if (! (info->unresolved_syms_in_objects == RM_IGNORE 2768 && (ELF_ST_VISIBILITY (hh->root.other) 2769 == STV_DEFAULT))) 2770 continue; 2771 } 2772 else 2773 { 2774 bfd_set_error (bfd_error_bad_value); 2775 goto error_ret_free_internal; 2776 } 2777 } 2778 2779 /* Determine what (if any) linker stub is needed. */ 2780 stub_type = nios2_type_of_stub (section, irela, hh, htab, 2781 destination, info); 2782 if (stub_type == nios2_stub_none) 2783 continue; 2784 2785 /* Support for grouping stub sections. */ 2786 if (stub_type == nios2_stub_call26_before) 2787 id_sec = htab->stub_group[section->id].first_sec; 2788 else 2789 id_sec = htab->stub_group[section->id].last_sec; 2790 2791 /* Get the name of this stub. */ 2792 stub_name = nios2_stub_name (id_sec, sym_sec, hh, irela, 2793 stub_type); 2794 if (!stub_name) 2795 goto error_ret_free_internal; 2796 2797 hsh = nios2_stub_hash_lookup (&htab->bstab, 2798 stub_name, 2799 FALSE, FALSE); 2800 if (hsh != NULL) 2801 { 2802 /* The proper stub has already been created. */ 2803 free (stub_name); 2804 continue; 2805 } 2806 2807 hsh = nios2_add_stub (stub_name, section, htab, stub_type); 2808 if (hsh == NULL) 2809 { 2810 free (stub_name); 2811 goto error_ret_free_internal; 2812 } 2813 hsh->target_value = sym_value; 2814 hsh->target_section = sym_sec; 2815 hsh->stub_type = stub_type; 2816 hsh->hh = hh; 2817 hsh->addend = irela->r_addend; 2818 stub_changed = TRUE; 2819 } 2820 2821 /* We're done with the internal relocs, free them. */ 2822 if (elf_section_data (section)->relocs == NULL) 2823 free (internal_relocs); 2824 } 2825 } 2826 2827 if (!stub_changed) 2828 break; 2829 2830 /* OK, we've added some stubs. Find out the new size of the 2831 stub sections. */ 2832 for (stub_sec = htab->stub_bfd->sections; 2833 stub_sec != NULL; 2834 stub_sec = stub_sec->next) 2835 stub_sec->size = 0; 2836 2837 bfd_hash_traverse (&htab->bstab, nios2_size_one_stub, htab); 2838 2839 /* Ask the linker to do its stuff. */ 2840 (*htab->layout_sections_again) (); 2841 stub_changed = FALSE; 2842 } 2843 2844 free (htab->all_local_syms); 2845 return TRUE; 2846 2847 error_ret_free_local: 2848 free (htab->all_local_syms); 2849 return FALSE; 2850 } 2851 2852 /* Build all the stubs associated with the current output file. The 2853 stubs are kept in a hash table attached to the main linker hash 2854 table. This function is called via nios2elf_finish in the linker. */ 2855 bfd_boolean 2856 nios2_elf32_build_stubs (struct bfd_link_info *info) 2857 { 2858 asection *stub_sec; 2859 struct bfd_hash_table *table; 2860 struct elf32_nios2_link_hash_table *htab; 2861 2862 htab = elf32_nios2_hash_table (info); 2863 2864 for (stub_sec = htab->stub_bfd->sections; 2865 stub_sec != NULL; 2866 stub_sec = stub_sec->next) 2867 /* The stub_bfd may contain non-stub sections if it is also the 2868 dynobj. Any such non-stub sections are created with the 2869 SEC_LINKER_CREATED flag set, while stub sections do not 2870 have that flag. Ignore any non-stub sections here. */ 2871 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0) 2872 { 2873 bfd_size_type size; 2874 2875 /* Allocate memory to hold the linker stubs. */ 2876 size = stub_sec->size; 2877 stub_sec->contents = bfd_zalloc (htab->stub_bfd, size); 2878 if (stub_sec->contents == NULL && size != 0) 2879 return FALSE; 2880 stub_sec->size = 0; 2881 } 2882 2883 /* Build the stubs as directed by the stub hash table. */ 2884 table = &htab->bstab; 2885 bfd_hash_traverse (table, nios2_build_one_stub, info); 2886 2887 return TRUE; 2888 } 2889 2890 2891 #define is_nios2_elf(bfd) \ 2892 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ 2893 && elf_object_id (bfd) == NIOS2_ELF_DATA) 2894 2895 /* Merge backend specific data from an object file to the output 2896 object file when linking. */ 2897 2898 static bfd_boolean 2899 nios2_elf32_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) 2900 { 2901 bfd *obfd = info->output_bfd; 2902 flagword old_flags; 2903 flagword new_flags; 2904 2905 if (!is_nios2_elf (ibfd) || !is_nios2_elf (obfd)) 2906 return TRUE; 2907 2908 /* Check if we have the same endianness. */ 2909 if (! _bfd_generic_verify_endian_match (ibfd, info)) 2910 return FALSE; 2911 2912 new_flags = elf_elfheader (ibfd)->e_flags; 2913 old_flags = elf_elfheader (obfd)->e_flags; 2914 if (!elf_flags_init (obfd)) 2915 { 2916 /* First call, no flags set. */ 2917 elf_flags_init (obfd) = TRUE; 2918 elf_elfheader (obfd)->e_flags = new_flags; 2919 2920 switch (new_flags) 2921 { 2922 default: 2923 case EF_NIOS2_ARCH_R1: 2924 bfd_default_set_arch_mach (obfd, bfd_arch_nios2, bfd_mach_nios2r1); 2925 break; 2926 case EF_NIOS2_ARCH_R2: 2927 if (bfd_big_endian (ibfd)) 2928 { 2929 _bfd_error_handler 2930 (_("error: %pB: big-endian R2 is not supported"), ibfd); 2931 bfd_set_error (bfd_error_bad_value); 2932 return FALSE; 2933 } 2934 bfd_default_set_arch_mach (obfd, bfd_arch_nios2, bfd_mach_nios2r2); 2935 break; 2936 } 2937 } 2938 2939 /* Incompatible flags. */ 2940 else if (new_flags != old_flags) 2941 { 2942 /* So far, the only incompatible flags denote incompatible 2943 architectures. */ 2944 _bfd_error_handler 2945 /* xgettext:c-format */ 2946 (_("error: %pB: conflicting CPU architectures %d/%d"), 2947 ibfd, new_flags, old_flags); 2948 bfd_set_error (bfd_error_bad_value); 2949 return FALSE; 2950 } 2951 2952 /* Merge Tag_compatibility attributes and any common GNU ones. */ 2953 _bfd_elf_merge_object_attributes (ibfd, info); 2954 2955 return TRUE; 2956 } 2957 2958 /* Implement bfd_elf32_bfd_reloc_type_lookup: 2959 Given a BFD reloc type, return a howto structure. */ 2960 2961 static reloc_howto_type * 2962 nios2_elf32_bfd_reloc_type_lookup (bfd *abfd, 2963 bfd_reloc_code_real_type code) 2964 { 2965 int i; 2966 2967 for (i = 0; i < (int) ARRAY_SIZE (nios2_reloc_map); ++i) 2968 if (nios2_reloc_map[i].bfd_val == code) 2969 return lookup_howto (nios2_reloc_map[i].elf_val, abfd); 2970 return NULL; 2971 } 2972 2973 /* Implement bfd_elf32_bfd_reloc_name_lookup: 2974 Given a reloc name, return a howto structure. */ 2975 2976 static reloc_howto_type * 2977 nios2_elf32_bfd_reloc_name_lookup (bfd *abfd, 2978 const char *r_name) 2979 { 2980 int i; 2981 reloc_howto_type *howto_tbl; 2982 int howto_tbl_size; 2983 2984 if (BFD_IS_R2 (abfd)) 2985 { 2986 howto_tbl = elf_nios2_r2_howto_table_rel; 2987 howto_tbl_size = (int) ARRAY_SIZE (elf_nios2_r2_howto_table_rel); 2988 } 2989 else 2990 { 2991 howto_tbl = elf_nios2_r1_howto_table_rel; 2992 howto_tbl_size = (int) ARRAY_SIZE (elf_nios2_r1_howto_table_rel); 2993 } 2994 2995 for (i = 0; i < howto_tbl_size; i++) 2996 if (howto_tbl[i].name && strcasecmp (howto_tbl[i].name, r_name) == 0) 2997 return howto_tbl + i; 2998 2999 return NULL; 3000 } 3001 3002 /* Implement elf_info_to_howto: 3003 Given a ELF32 relocation, fill in a arelent structure. */ 3004 3005 static bfd_boolean 3006 nios2_elf32_info_to_howto (bfd *abfd, arelent *cache_ptr, 3007 Elf_Internal_Rela *dst) 3008 { 3009 unsigned int r_type; 3010 3011 r_type = ELF32_R_TYPE (dst->r_info); 3012 if ((cache_ptr->howto = lookup_howto (r_type, abfd)) == NULL) 3013 { 3014 /* xgettext:c-format */ 3015 _bfd_error_handler (_("%pB: unsupported relocation type %#x"), 3016 abfd, r_type); 3017 bfd_set_error (bfd_error_bad_value); 3018 return FALSE; 3019 } 3020 return TRUE; 3021 } 3022 3023 /* Return the base VMA address which should be subtracted from real addresses 3024 when resolving @dtpoff relocation. 3025 This is PT_TLS segment p_vaddr. */ 3026 static bfd_vma 3027 dtpoff_base (struct bfd_link_info *info) 3028 { 3029 /* If tls_sec is NULL, we should have signalled an error already. */ 3030 if (elf_hash_table (info)->tls_sec == NULL) 3031 return 0; 3032 return elf_hash_table (info)->tls_sec->vma; 3033 } 3034 3035 /* Return the relocation value for @tpoff relocation 3036 if STT_TLS virtual address is ADDRESS. */ 3037 static bfd_vma 3038 tpoff (struct bfd_link_info *info, bfd_vma address) 3039 { 3040 struct elf_link_hash_table *htab = elf_hash_table (info); 3041 3042 /* If tls_sec is NULL, we should have signalled an error already. */ 3043 if (htab->tls_sec == NULL) 3044 return 0; 3045 return address - htab->tls_sec->vma; 3046 } 3047 3048 /* Set the GP value for OUTPUT_BFD. Returns FALSE if this is a 3049 dangerous relocation. */ 3050 static bfd_boolean 3051 nios2_elf_assign_gp (bfd *output_bfd, bfd_vma *pgp, struct bfd_link_info *info) 3052 { 3053 3054 bfd_boolean gp_found; 3055 struct bfd_hash_entry *h; 3056 struct bfd_link_hash_entry *lh; 3057 3058 /* If we've already figured out what GP will be, just return it. */ 3059 *pgp = _bfd_get_gp_value (output_bfd); 3060 if (*pgp) 3061 return TRUE; 3062 3063 h = bfd_hash_lookup (&info->hash->table, "_gp", FALSE, FALSE); 3064 lh = (struct bfd_link_hash_entry *) h; 3065 lookup: 3066 if (lh) 3067 { 3068 switch (lh->type) 3069 { 3070 case bfd_link_hash_undefined: 3071 case bfd_link_hash_undefweak: 3072 case bfd_link_hash_common: 3073 gp_found = FALSE; 3074 break; 3075 case bfd_link_hash_defined: 3076 case bfd_link_hash_defweak: 3077 gp_found = TRUE; 3078 { 3079 asection *sym_sec = lh->u.def.section; 3080 bfd_vma sym_value = lh->u.def.value; 3081 3082 if (sym_sec->output_section) 3083 sym_value = (sym_value + sym_sec->output_offset 3084 + sym_sec->output_section->vma); 3085 *pgp = sym_value; 3086 } 3087 break; 3088 case bfd_link_hash_indirect: 3089 case bfd_link_hash_warning: 3090 lh = lh->u.i.link; 3091 /* @@FIXME ignoring warning for now */ 3092 goto lookup; 3093 case bfd_link_hash_new: 3094 default: 3095 abort (); 3096 } 3097 } 3098 else 3099 gp_found = FALSE; 3100 3101 if (!gp_found) 3102 { 3103 /* Only get the error once. */ 3104 *pgp = 4; 3105 _bfd_set_gp_value (output_bfd, *pgp); 3106 return FALSE; 3107 } 3108 3109 _bfd_set_gp_value (output_bfd, *pgp); 3110 3111 return TRUE; 3112 } 3113 3114 /* Retrieve the previously cached _gp pointer, returning bfd_reloc_dangerous 3115 if it's not available as we don't have a link_info pointer available here 3116 to look it up in the output symbol table. We don't need to adjust the 3117 symbol value for an external symbol if we are producing relocatable 3118 output. */ 3119 static bfd_reloc_status_type 3120 nios2_elf_final_gp (bfd *output_bfd, asymbol *symbol, bfd_boolean relocatable, 3121 char **error_message, bfd_vma *pgp) 3122 { 3123 if (bfd_is_und_section (symbol->section) && !relocatable) 3124 { 3125 *pgp = 0; 3126 return bfd_reloc_undefined; 3127 } 3128 3129 *pgp = _bfd_get_gp_value (output_bfd); 3130 if (*pgp == 0 && (!relocatable || (symbol->flags & BSF_SECTION_SYM) != 0)) 3131 { 3132 if (relocatable) 3133 { 3134 /* Make up a value. */ 3135 *pgp = symbol->section->output_section->vma + 0x4000; 3136 _bfd_set_gp_value (output_bfd, *pgp); 3137 } 3138 else 3139 { 3140 *error_message 3141 = (char *) _("global pointer relative relocation when _gp not defined"); 3142 return bfd_reloc_dangerous; 3143 } 3144 } 3145 3146 return bfd_reloc_ok; 3147 } 3148 3149 /* Do the relocations that require special handling. */ 3150 static bfd_reloc_status_type 3151 nios2_elf32_do_hi16_relocate (bfd *abfd, reloc_howto_type *howto, 3152 asection *input_section, 3153 bfd_byte *data, bfd_vma offset, 3154 bfd_vma symbol_value, bfd_vma addend) 3155 { 3156 symbol_value = symbol_value + addend; 3157 addend = 0; 3158 symbol_value = (symbol_value >> 16) & 0xffff; 3159 return _bfd_final_link_relocate (howto, abfd, input_section, 3160 data, offset, symbol_value, addend); 3161 } 3162 3163 static bfd_reloc_status_type 3164 nios2_elf32_do_lo16_relocate (bfd *abfd, reloc_howto_type *howto, 3165 asection *input_section, 3166 bfd_byte *data, bfd_vma offset, 3167 bfd_vma symbol_value, bfd_vma addend) 3168 { 3169 symbol_value = symbol_value + addend; 3170 addend = 0; 3171 symbol_value = symbol_value & 0xffff; 3172 return _bfd_final_link_relocate (howto, abfd, input_section, 3173 data, offset, symbol_value, addend); 3174 } 3175 3176 static bfd_reloc_status_type 3177 nios2_elf32_do_hiadj16_relocate (bfd *abfd, reloc_howto_type *howto, 3178 asection *input_section, 3179 bfd_byte *data, bfd_vma offset, 3180 bfd_vma symbol_value, bfd_vma addend) 3181 { 3182 symbol_value = symbol_value + addend; 3183 addend = 0; 3184 symbol_value = hiadj(symbol_value); 3185 return _bfd_final_link_relocate (howto, abfd, input_section, data, offset, 3186 symbol_value, addend); 3187 } 3188 3189 static bfd_reloc_status_type 3190 nios2_elf32_do_pcrel_lo16_relocate (bfd *abfd, reloc_howto_type *howto, 3191 asection *input_section, 3192 bfd_byte *data, bfd_vma offset, 3193 bfd_vma symbol_value, bfd_vma addend) 3194 { 3195 symbol_value = symbol_value + addend; 3196 addend = 0; 3197 symbol_value = symbol_value & 0xffff; 3198 return _bfd_final_link_relocate (howto, abfd, input_section, 3199 data, offset, symbol_value, addend); 3200 } 3201 3202 static bfd_reloc_status_type 3203 nios2_elf32_do_pcrel_hiadj16_relocate (bfd *abfd, reloc_howto_type *howto, 3204 asection *input_section, 3205 bfd_byte *data, bfd_vma offset, 3206 bfd_vma symbol_value, bfd_vma addend) 3207 { 3208 symbol_value = symbol_value + addend; 3209 symbol_value -= (input_section->output_section->vma 3210 + input_section->output_offset); 3211 symbol_value -= offset; 3212 addend = 0; 3213 symbol_value = hiadj(symbol_value); 3214 return _bfd_final_link_relocate (howto, abfd, input_section, data, offset, 3215 symbol_value, addend); 3216 } 3217 3218 static bfd_reloc_status_type 3219 nios2_elf32_do_pcrel16_relocate (bfd *abfd, reloc_howto_type *howto, 3220 asection *input_section, 3221 bfd_byte *data, bfd_vma offset, 3222 bfd_vma symbol_value, bfd_vma addend) 3223 { 3224 /* NIOS2 pc relative relocations are relative to the next 32-bit instruction 3225 so we need to subtract 4 before doing a final_link_relocate. */ 3226 symbol_value = symbol_value + addend - 4; 3227 addend = 0; 3228 return _bfd_final_link_relocate (howto, abfd, input_section, 3229 data, offset, symbol_value, addend); 3230 } 3231 3232 static bfd_reloc_status_type 3233 nios2_elf32_do_call26_relocate (bfd *abfd, reloc_howto_type *howto, 3234 asection *input_section, 3235 bfd_byte *data, bfd_vma offset, 3236 bfd_vma symbol_value, bfd_vma addend) 3237 { 3238 /* Check that the relocation is in the same page as the current address. */ 3239 if (CALL26_SEGMENT (symbol_value + addend) 3240 != CALL26_SEGMENT (input_section->output_section->vma 3241 + input_section->output_offset 3242 + offset)) 3243 return bfd_reloc_overflow; 3244 3245 /* Check that the target address is correctly aligned on a 4-byte 3246 boundary. */ 3247 if ((symbol_value + addend) & 0x3) 3248 return bfd_reloc_overflow; 3249 3250 return _bfd_final_link_relocate (howto, abfd, input_section, 3251 data, offset, symbol_value, addend); 3252 } 3253 3254 static bfd_reloc_status_type 3255 nios2_elf32_do_gprel_relocate (bfd *abfd, reloc_howto_type *howto, 3256 asection *input_section, 3257 bfd_byte *data, bfd_vma offset, 3258 bfd_vma symbol_value, bfd_vma addend) 3259 { 3260 /* Because we need the output_bfd, the special handling is done 3261 in nios2_elf32_relocate_section or in nios2_elf32_gprel_relocate. */ 3262 return _bfd_final_link_relocate (howto, abfd, input_section, 3263 data, offset, symbol_value, addend); 3264 } 3265 3266 static bfd_reloc_status_type 3267 nios2_elf32_do_ujmp_relocate (bfd *abfd, reloc_howto_type *howto, 3268 asection *input_section, 3269 bfd_byte *data, bfd_vma offset, 3270 bfd_vma symbol_value, bfd_vma addend) 3271 { 3272 bfd_vma symbol_lo16, symbol_hi16; 3273 bfd_reloc_status_type r; 3274 symbol_value = symbol_value + addend; 3275 addend = 0; 3276 symbol_hi16 = (symbol_value >> 16) & 0xffff; 3277 symbol_lo16 = symbol_value & 0xffff; 3278 3279 r = _bfd_final_link_relocate (howto, abfd, input_section, 3280 data, offset, symbol_hi16, addend); 3281 3282 if (r == bfd_reloc_ok) 3283 return _bfd_final_link_relocate (howto, abfd, input_section, 3284 data, offset + 4, symbol_lo16, addend); 3285 3286 return r; 3287 } 3288 3289 static bfd_reloc_status_type 3290 nios2_elf32_do_cjmp_relocate (bfd *abfd, reloc_howto_type *howto, 3291 asection *input_section, 3292 bfd_byte *data, bfd_vma offset, 3293 bfd_vma symbol_value, bfd_vma addend) 3294 { 3295 bfd_vma symbol_lo16, symbol_hi16; 3296 bfd_reloc_status_type r; 3297 symbol_value = symbol_value + addend; 3298 addend = 0; 3299 symbol_hi16 = (symbol_value >> 16) & 0xffff; 3300 symbol_lo16 = symbol_value & 0xffff; 3301 3302 r = _bfd_final_link_relocate (howto, abfd, input_section, 3303 data, offset, symbol_hi16, addend); 3304 3305 if (r == bfd_reloc_ok) 3306 return _bfd_final_link_relocate (howto, abfd, input_section, 3307 data, offset + 4, symbol_lo16, addend); 3308 3309 return r; 3310 } 3311 3312 static bfd_reloc_status_type 3313 nios2_elf32_do_callr_relocate (bfd *abfd, reloc_howto_type *howto, 3314 asection *input_section, 3315 bfd_byte *data, bfd_vma offset, 3316 bfd_vma symbol_value, bfd_vma addend) 3317 { 3318 bfd_vma symbol_lo16, symbol_hi16; 3319 bfd_reloc_status_type r; 3320 symbol_value = symbol_value + addend; 3321 addend = 0; 3322 symbol_hi16 = (symbol_value >> 16) & 0xffff; 3323 symbol_lo16 = symbol_value & 0xffff; 3324 3325 r = _bfd_final_link_relocate (howto, abfd, input_section, 3326 data, offset, symbol_hi16, addend); 3327 3328 if (r == bfd_reloc_ok) 3329 return _bfd_final_link_relocate (howto, abfd, input_section, 3330 data, offset + 4, symbol_lo16, addend); 3331 3332 return r; 3333 } 3334 3335 /* HOWTO handlers for relocations that require special handling. */ 3336 3337 /* This is for relocations used only when relaxing to ensure 3338 changes in size of section don't screw up .align. */ 3339 static bfd_reloc_status_type 3340 nios2_elf32_ignore_reloc (bfd *abfd ATTRIBUTE_UNUSED, arelent *reloc_entry, 3341 asymbol *symbol ATTRIBUTE_UNUSED, 3342 void *data ATTRIBUTE_UNUSED, asection *input_section, 3343 bfd *output_bfd, 3344 char **error_message ATTRIBUTE_UNUSED) 3345 { 3346 if (output_bfd != NULL) 3347 reloc_entry->address += input_section->output_offset; 3348 return bfd_reloc_ok; 3349 } 3350 3351 static bfd_reloc_status_type 3352 nios2_elf32_hi16_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, 3353 void *data, asection *input_section, 3354 bfd *output_bfd, 3355 char **error_message ATTRIBUTE_UNUSED) 3356 { 3357 /* This part is from bfd_elf_generic_reloc. */ 3358 if (output_bfd != NULL 3359 && (symbol->flags & BSF_SECTION_SYM) == 0 3360 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) 3361 { 3362 reloc_entry->address += input_section->output_offset; 3363 return bfd_reloc_ok; 3364 } 3365 3366 if (output_bfd != NULL) 3367 /* FIXME: See bfd_perform_relocation. Is this right? */ 3368 return bfd_reloc_continue; 3369 3370 return nios2_elf32_do_hi16_relocate (abfd, reloc_entry->howto, 3371 input_section, 3372 data, reloc_entry->address, 3373 (symbol->value 3374 + symbol->section->output_section->vma 3375 + symbol->section->output_offset), 3376 reloc_entry->addend); 3377 } 3378 3379 static bfd_reloc_status_type 3380 nios2_elf32_lo16_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, 3381 void *data, asection *input_section, 3382 bfd *output_bfd, 3383 char **error_message ATTRIBUTE_UNUSED) 3384 { 3385 /* This part is from bfd_elf_generic_reloc. */ 3386 if (output_bfd != NULL 3387 && (symbol->flags & BSF_SECTION_SYM) == 0 3388 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) 3389 { 3390 reloc_entry->address += input_section->output_offset; 3391 return bfd_reloc_ok; 3392 } 3393 3394 if (output_bfd != NULL) 3395 /* FIXME: See bfd_perform_relocation. Is this right? */ 3396 return bfd_reloc_continue; 3397 3398 return nios2_elf32_do_lo16_relocate (abfd, reloc_entry->howto, 3399 input_section, 3400 data, reloc_entry->address, 3401 (symbol->value 3402 + symbol->section->output_section->vma 3403 + symbol->section->output_offset), 3404 reloc_entry->addend); 3405 } 3406 3407 static bfd_reloc_status_type 3408 nios2_elf32_hiadj16_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, 3409 void *data, asection *input_section, 3410 bfd *output_bfd, 3411 char **error_message ATTRIBUTE_UNUSED) 3412 { 3413 /* This part is from bfd_elf_generic_reloc. */ 3414 if (output_bfd != NULL 3415 && (symbol->flags & BSF_SECTION_SYM) == 0 3416 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) 3417 { 3418 reloc_entry->address += input_section->output_offset; 3419 return bfd_reloc_ok; 3420 } 3421 3422 if (output_bfd != NULL) 3423 /* FIXME: See bfd_perform_relocation. Is this right? */ 3424 return bfd_reloc_continue; 3425 3426 return nios2_elf32_do_hiadj16_relocate (abfd, reloc_entry->howto, 3427 input_section, 3428 data, reloc_entry->address, 3429 (symbol->value 3430 + symbol->section->output_section->vma 3431 + symbol->section->output_offset), 3432 reloc_entry->addend); 3433 } 3434 3435 static bfd_reloc_status_type 3436 nios2_elf32_pcrel_lo16_relocate (bfd *abfd, arelent *reloc_entry, 3437 asymbol *symbol, void *data, 3438 asection *input_section, bfd *output_bfd, 3439 char **error_message ATTRIBUTE_UNUSED) 3440 { 3441 /* This part is from bfd_elf_generic_reloc. */ 3442 if (output_bfd != NULL 3443 && (symbol->flags & BSF_SECTION_SYM) == 0 3444 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) 3445 { 3446 reloc_entry->address += input_section->output_offset; 3447 return bfd_reloc_ok; 3448 } 3449 3450 if (output_bfd != NULL) 3451 /* FIXME: See bfd_perform_relocation. Is this right? */ 3452 return bfd_reloc_continue; 3453 3454 return nios2_elf32_do_pcrel_lo16_relocate ( 3455 abfd, reloc_entry->howto, input_section, data, reloc_entry->address, 3456 (symbol->value + symbol->section->output_section->vma 3457 + symbol->section->output_offset), 3458 reloc_entry->addend); 3459 } 3460 3461 static bfd_reloc_status_type 3462 nios2_elf32_pcrel_hiadj16_relocate (bfd *abfd, arelent *reloc_entry, 3463 asymbol *symbol, void *data, 3464 asection *input_section, bfd *output_bfd, 3465 char **error_message ATTRIBUTE_UNUSED) 3466 { 3467 /* This part is from bfd_elf_generic_reloc. */ 3468 if (output_bfd != NULL 3469 && (symbol->flags & BSF_SECTION_SYM) == 0 3470 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) 3471 { 3472 reloc_entry->address += input_section->output_offset; 3473 return bfd_reloc_ok; 3474 } 3475 3476 if (output_bfd != NULL) 3477 /* FIXME: See bfd_perform_relocation. Is this right? */ 3478 return bfd_reloc_continue; 3479 3480 return nios2_elf32_do_pcrel_hiadj16_relocate ( 3481 abfd, reloc_entry->howto, input_section, data, reloc_entry->address, 3482 (symbol->value + symbol->section->output_section->vma 3483 + symbol->section->output_offset), 3484 reloc_entry->addend); 3485 } 3486 3487 static bfd_reloc_status_type 3488 nios2_elf32_pcrel16_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, 3489 void *data, asection *input_section, 3490 bfd *output_bfd, 3491 char **error_message ATTRIBUTE_UNUSED) 3492 { 3493 /* This part is from bfd_elf_generic_reloc. */ 3494 if (output_bfd != NULL 3495 && (symbol->flags & BSF_SECTION_SYM) == 0 3496 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) 3497 { 3498 reloc_entry->address += input_section->output_offset; 3499 return bfd_reloc_ok; 3500 } 3501 3502 if (output_bfd != NULL) 3503 /* FIXME: See bfd_perform_relocation. Is this right? */ 3504 return bfd_reloc_continue; 3505 3506 return nios2_elf32_do_pcrel16_relocate (abfd, reloc_entry->howto, 3507 input_section, 3508 data, reloc_entry->address, 3509 (symbol->value 3510 + symbol->section->output_section->vma 3511 + symbol->section->output_offset), 3512 reloc_entry->addend); 3513 } 3514 3515 static bfd_reloc_status_type 3516 nios2_elf32_call26_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, 3517 void *data, asection *input_section, 3518 bfd *output_bfd, 3519 char **error_message ATTRIBUTE_UNUSED) 3520 { 3521 /* This part is from bfd_elf_generic_reloc. */ 3522 if (output_bfd != NULL 3523 && (symbol->flags & BSF_SECTION_SYM) == 0 3524 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) 3525 { 3526 reloc_entry->address += input_section->output_offset; 3527 return bfd_reloc_ok; 3528 } 3529 3530 if (output_bfd != NULL) 3531 /* FIXME: See bfd_perform_relocation. Is this right? */ 3532 return bfd_reloc_continue; 3533 3534 return nios2_elf32_do_call26_relocate (abfd, reloc_entry->howto, 3535 input_section, 3536 data, reloc_entry->address, 3537 (symbol->value 3538 + symbol->section->output_section->vma 3539 + symbol->section->output_offset), 3540 reloc_entry->addend); 3541 } 3542 3543 static bfd_reloc_status_type 3544 nios2_elf32_gprel_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, 3545 void *data, asection *input_section, 3546 bfd *output_bfd, char **msg) 3547 { 3548 bfd_vma relocation; 3549 bfd_vma gp; 3550 bfd_reloc_status_type r; 3551 3552 3553 /* This part is from bfd_elf_generic_reloc. */ 3554 if (output_bfd != NULL 3555 && (symbol->flags & BSF_SECTION_SYM) == 0 3556 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) 3557 { 3558 reloc_entry->address += input_section->output_offset; 3559 return bfd_reloc_ok; 3560 } 3561 3562 if (output_bfd != NULL) 3563 /* FIXME: See bfd_perform_relocation. Is this right? */ 3564 return bfd_reloc_continue; 3565 3566 relocation = (symbol->value 3567 + symbol->section->output_section->vma 3568 + symbol->section->output_offset); 3569 3570 /* This assumes we've already cached the _gp symbol. */ 3571 r = nios2_elf_final_gp (abfd, symbol, FALSE, msg, &gp); 3572 if (r == bfd_reloc_ok) 3573 { 3574 relocation = relocation + reloc_entry->addend - gp; 3575 reloc_entry->addend = 0; 3576 if ((signed) relocation < -32768 || (signed) relocation > 32767) 3577 { 3578 *msg = _("global pointer relative address out of range"); 3579 r = bfd_reloc_outofrange; 3580 } 3581 else 3582 r = nios2_elf32_do_gprel_relocate (abfd, reloc_entry->howto, 3583 input_section, 3584 data, reloc_entry->address, 3585 relocation, reloc_entry->addend); 3586 } 3587 3588 return r; 3589 } 3590 3591 static bfd_reloc_status_type 3592 nios2_elf32_ujmp_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, 3593 void *data, asection *input_section, 3594 bfd *output_bfd, char **msg ATTRIBUTE_UNUSED) 3595 { 3596 /* This part is from bfd_elf_generic_reloc. */ 3597 if (output_bfd != NULL 3598 && (symbol->flags & BSF_SECTION_SYM) == 0 3599 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) 3600 { 3601 reloc_entry->address += input_section->output_offset; 3602 return bfd_reloc_ok; 3603 } 3604 3605 if (output_bfd != NULL) 3606 /* FIXME: See bfd_perform_relocation. Is this right? */ 3607 return bfd_reloc_continue; 3608 3609 return nios2_elf32_do_ujmp_relocate (abfd, reloc_entry->howto, 3610 input_section, 3611 data, reloc_entry->address, 3612 (symbol->value 3613 + symbol->section->output_section->vma 3614 + symbol->section->output_offset), 3615 reloc_entry->addend); 3616 } 3617 3618 static bfd_reloc_status_type 3619 nios2_elf32_cjmp_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, 3620 void *data, asection *input_section, 3621 bfd *output_bfd, char **msg ATTRIBUTE_UNUSED) 3622 { 3623 /* This part is from bfd_elf_generic_reloc. */ 3624 if (output_bfd != NULL 3625 && (symbol->flags & BSF_SECTION_SYM) == 0 3626 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) 3627 { 3628 reloc_entry->address += input_section->output_offset; 3629 return bfd_reloc_ok; 3630 } 3631 3632 if (output_bfd != NULL) 3633 /* FIXME: See bfd_perform_relocation. Is this right? */ 3634 return bfd_reloc_continue; 3635 3636 return nios2_elf32_do_cjmp_relocate (abfd, reloc_entry->howto, 3637 input_section, 3638 data, reloc_entry->address, 3639 (symbol->value 3640 + symbol->section->output_section->vma 3641 + symbol->section->output_offset), 3642 reloc_entry->addend); 3643 } 3644 3645 static bfd_reloc_status_type 3646 nios2_elf32_callr_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, 3647 void *data, asection *input_section, 3648 bfd *output_bfd, char **msg ATTRIBUTE_UNUSED) 3649 { 3650 /* This part is from bfd_elf_generic_reloc. */ 3651 if (output_bfd != NULL 3652 && (symbol->flags & BSF_SECTION_SYM) == 0 3653 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) 3654 { 3655 reloc_entry->address += input_section->output_offset; 3656 return bfd_reloc_ok; 3657 } 3658 3659 if (output_bfd != NULL) 3660 /* FIXME: See bfd_perform_relocation. Is this right? */ 3661 return bfd_reloc_continue; 3662 3663 return nios2_elf32_do_callr_relocate (abfd, reloc_entry->howto, 3664 input_section, 3665 data, reloc_entry->address, 3666 (symbol->value 3667 + symbol->section->output_section->vma 3668 + symbol->section->output_offset), 3669 reloc_entry->addend); 3670 } 3671 3672 3673 /* Implement elf_backend_relocate_section. */ 3674 static bfd_boolean 3675 nios2_elf32_relocate_section (bfd *output_bfd, 3676 struct bfd_link_info *info, 3677 bfd *input_bfd, 3678 asection *input_section, 3679 bfd_byte *contents, 3680 Elf_Internal_Rela *relocs, 3681 Elf_Internal_Sym *local_syms, 3682 asection **local_sections) 3683 { 3684 Elf_Internal_Shdr *symtab_hdr; 3685 struct elf_link_hash_entry **sym_hashes; 3686 Elf_Internal_Rela *rel; 3687 Elf_Internal_Rela *relend; 3688 struct elf32_nios2_link_hash_table *htab; 3689 asection *sgot; 3690 asection *splt; 3691 asection *sreloc = NULL; 3692 bfd_vma *local_got_offsets; 3693 bfd_vma got_base; 3694 3695 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; 3696 sym_hashes = elf_sym_hashes (input_bfd); 3697 relend = relocs + input_section->reloc_count; 3698 3699 htab = elf32_nios2_hash_table (info); 3700 sgot = htab->root.sgot; 3701 splt = htab->root.splt; 3702 local_got_offsets = elf_local_got_offsets (input_bfd); 3703 3704 if (htab->h_gp_got == NULL) 3705 got_base = 0; 3706 else 3707 got_base = htab->h_gp_got->root.u.def.value; 3708 3709 for (rel = relocs; rel < relend; rel++) 3710 { 3711 reloc_howto_type *howto; 3712 unsigned long r_symndx; 3713 Elf_Internal_Sym *sym; 3714 asection *sec; 3715 struct elf_link_hash_entry *h; 3716 struct elf32_nios2_link_hash_entry *eh; 3717 bfd_vma relocation; 3718 bfd_vma gp; 3719 bfd_reloc_status_type r = bfd_reloc_ok; 3720 const char *name = NULL; 3721 int r_type; 3722 const char *format; 3723 char msgbuf[256]; 3724 const char* msg = (const char*) NULL; 3725 bfd_boolean unresolved_reloc; 3726 bfd_vma off; 3727 int use_plt; 3728 3729 r_type = ELF32_R_TYPE (rel->r_info); 3730 r_symndx = ELF32_R_SYM (rel->r_info); 3731 3732 howto = lookup_howto ((unsigned) ELF32_R_TYPE (rel->r_info), output_bfd); 3733 h = NULL; 3734 sym = NULL; 3735 sec = NULL; 3736 3737 if (r_symndx < symtab_hdr->sh_info) 3738 { 3739 sym = local_syms + r_symndx; 3740 sec = local_sections[r_symndx]; 3741 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 3742 } 3743 else 3744 { 3745 bfd_boolean warned, ignored; 3746 3747 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 3748 r_symndx, symtab_hdr, sym_hashes, 3749 h, sec, relocation, 3750 unresolved_reloc, warned, ignored); 3751 } 3752 3753 if (sec && discarded_section (sec)) 3754 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, 3755 rel, 1, relend, howto, 0, contents); 3756 3757 /* Nothing more to do unless this is a final link. */ 3758 if (bfd_link_relocatable (info)) 3759 continue; 3760 3761 if (howto) 3762 { 3763 bfd_boolean resolved_to_zero; 3764 3765 resolved_to_zero = (h != NULL 3766 && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)); 3767 switch (howto->type) 3768 { 3769 case R_NIOS2_HI16: 3770 r = nios2_elf32_do_hi16_relocate (input_bfd, howto, 3771 input_section, 3772 contents, rel->r_offset, 3773 relocation, rel->r_addend); 3774 break; 3775 case R_NIOS2_LO16: 3776 r = nios2_elf32_do_lo16_relocate (input_bfd, howto, 3777 input_section, 3778 contents, rel->r_offset, 3779 relocation, rel->r_addend); 3780 break; 3781 case R_NIOS2_PCREL_LO: 3782 r = nios2_elf32_do_pcrel_lo16_relocate (input_bfd, howto, 3783 input_section, 3784 contents, 3785 rel->r_offset, 3786 relocation, 3787 rel->r_addend); 3788 break; 3789 case R_NIOS2_HIADJ16: 3790 r = nios2_elf32_do_hiadj16_relocate (input_bfd, howto, 3791 input_section, contents, 3792 rel->r_offset, relocation, 3793 rel->r_addend); 3794 break; 3795 case R_NIOS2_PCREL_HA: 3796 r = nios2_elf32_do_pcrel_hiadj16_relocate (input_bfd, howto, 3797 input_section, 3798 contents, 3799 rel->r_offset, 3800 relocation, 3801 rel->r_addend); 3802 break; 3803 case R_NIOS2_PCREL16: 3804 r = nios2_elf32_do_pcrel16_relocate (input_bfd, howto, 3805 input_section, contents, 3806 rel->r_offset, relocation, 3807 rel->r_addend); 3808 break; 3809 case R_NIOS2_GPREL: 3810 /* Turns an absolute address into a gp-relative address. */ 3811 if (!nios2_elf_assign_gp (output_bfd, &gp, info)) 3812 { 3813 bfd_vma reloc_address; 3814 3815 if (sec && sec->output_section) 3816 reloc_address = (sec->output_section->vma 3817 + sec->output_offset 3818 + rel->r_offset); 3819 else 3820 reloc_address = 0; 3821 3822 format = _("global pointer relative relocation at address " 3823 "0x%08x when _gp not defined\n"); 3824 sprintf (msgbuf, format, reloc_address); 3825 msg = msgbuf; 3826 r = bfd_reloc_dangerous; 3827 } 3828 else 3829 { 3830 bfd_vma symbol_address = rel->r_addend + relocation; 3831 relocation = symbol_address - gp; 3832 rel->r_addend = 0; 3833 if (((signed) relocation < -32768 3834 || (signed) relocation > 32767) 3835 && (!h 3836 || h->root.type == bfd_link_hash_defined 3837 || h->root.type == bfd_link_hash_defweak)) 3838 { 3839 if (h) 3840 name = h->root.root.string; 3841 /* xgettext:c-format */ 3842 format = _("unable to reach %s (at 0x%08x) from the " 3843 "global pointer (at 0x%08x) because the " 3844 "offset (%d) is out of the allowed range, " 3845 "-32678 to 32767\n" ); 3846 sprintf (msgbuf, format, name, symbol_address, gp, 3847 (signed)relocation); 3848 msg = msgbuf; 3849 r = bfd_reloc_outofrange; 3850 } 3851 else 3852 r = _bfd_final_link_relocate (howto, input_bfd, 3853 input_section, contents, 3854 rel->r_offset, relocation, 3855 rel->r_addend); 3856 } 3857 break; 3858 case R_NIOS2_UJMP: 3859 r = nios2_elf32_do_ujmp_relocate (input_bfd, howto, 3860 input_section, 3861 contents, rel->r_offset, 3862 relocation, rel->r_addend); 3863 break; 3864 case R_NIOS2_CJMP: 3865 r = nios2_elf32_do_cjmp_relocate (input_bfd, howto, 3866 input_section, 3867 contents, rel->r_offset, 3868 relocation, rel->r_addend); 3869 break; 3870 case R_NIOS2_CALLR: 3871 r = nios2_elf32_do_callr_relocate (input_bfd, howto, 3872 input_section, contents, 3873 rel->r_offset, relocation, 3874 rel->r_addend); 3875 break; 3876 case R_NIOS2_CALL26: 3877 case R_NIOS2_CALL26_NOAT: 3878 /* If we have a call to an undefined weak symbol, we just want 3879 to stuff a zero in the bits of the call instruction and 3880 bypass the normal call26 relocation handling, because it'll 3881 diagnose an overflow error if address 0 isn't in the same 3882 256MB segment as the call site. Presumably the call 3883 should be guarded by a null check anyway. */ 3884 if (h != NULL && h->root.type == bfd_link_hash_undefweak) 3885 { 3886 BFD_ASSERT (relocation == 0 && rel->r_addend == 0); 3887 r = _bfd_final_link_relocate (howto, input_bfd, 3888 input_section, contents, 3889 rel->r_offset, relocation, 3890 rel->r_addend); 3891 break; 3892 } 3893 /* Handle relocations which should use the PLT entry. 3894 NIOS2_BFD_RELOC_32 relocations will use the symbol's value, 3895 which may point to a PLT entry, but we don't need to handle 3896 that here. If we created a PLT entry, all branches in this 3897 object should go to it. */ 3898 if (h != NULL && splt != NULL && h->plt.offset != (bfd_vma) -1) 3899 { 3900 /* If we've created a .plt section, and assigned a PLT entry 3901 to this function, it should not be known to bind locally. 3902 If it were, we would have cleared the PLT entry. */ 3903 BFD_ASSERT (!SYMBOL_CALLS_LOCAL (info, h)); 3904 3905 relocation = (splt->output_section->vma 3906 + splt->output_offset 3907 + h->plt.offset); 3908 3909 unresolved_reloc = FALSE; 3910 } 3911 /* Detect R_NIOS2_CALL26 relocations that would overflow the 3912 256MB segment. Replace the target with a reference to a 3913 trampoline instead. 3914 Note that htab->stub_group is null if relaxation has been 3915 disabled by the --no-relax linker command-line option, so 3916 we can use that to skip this processing entirely. */ 3917 if (howto->type == R_NIOS2_CALL26 && htab->stub_group) 3918 { 3919 bfd_vma dest = relocation + rel->r_addend; 3920 enum elf32_nios2_stub_type stub_type; 3921 3922 eh = (struct elf32_nios2_link_hash_entry *)h; 3923 stub_type = nios2_type_of_stub (input_section, rel, eh, 3924 htab, dest, NULL); 3925 3926 if (stub_type != nios2_stub_none) 3927 { 3928 struct elf32_nios2_stub_hash_entry *hsh; 3929 3930 hsh = nios2_get_stub_entry (input_section, sec, 3931 eh, rel, htab, stub_type); 3932 if (hsh == NULL) 3933 { 3934 r = bfd_reloc_undefined; 3935 break; 3936 } 3937 3938 dest = (hsh->stub_offset 3939 + hsh->stub_sec->output_offset 3940 + hsh->stub_sec->output_section->vma); 3941 r = nios2_elf32_do_call26_relocate (input_bfd, howto, 3942 input_section, 3943 contents, 3944 rel->r_offset, 3945 dest, 0); 3946 break; 3947 } 3948 } 3949 3950 /* Normal case. */ 3951 r = nios2_elf32_do_call26_relocate (input_bfd, howto, 3952 input_section, contents, 3953 rel->r_offset, relocation, 3954 rel->r_addend); 3955 break; 3956 case R_NIOS2_ALIGN: 3957 r = bfd_reloc_ok; 3958 /* For symmetry this would be 3959 r = nios2_elf32_do_ignore_reloc (input_bfd, howto, 3960 input_section, contents, 3961 rel->r_offset, relocation, 3962 rel->r_addend); 3963 but do_ignore_reloc would do no more than return 3964 bfd_reloc_ok. */ 3965 break; 3966 3967 case R_NIOS2_GOT16: 3968 case R_NIOS2_CALL16: 3969 case R_NIOS2_GOT_LO: 3970 case R_NIOS2_GOT_HA: 3971 case R_NIOS2_CALL_LO: 3972 case R_NIOS2_CALL_HA: 3973 /* Relocation is to the entry for this symbol in the 3974 global offset table. */ 3975 if (sgot == NULL) 3976 { 3977 r = bfd_reloc_notsupported; 3978 break; 3979 } 3980 3981 use_plt = 0; 3982 3983 if (h != NULL) 3984 { 3985 bfd_boolean dyn; 3986 3987 eh = (struct elf32_nios2_link_hash_entry *)h; 3988 use_plt = (eh->got_types_used == CALL_USED 3989 && h->plt.offset != (bfd_vma) -1); 3990 3991 off = h->got.offset; 3992 BFD_ASSERT (off != (bfd_vma) -1); 3993 dyn = htab->root.dynamic_sections_created; 3994 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 3995 bfd_link_pic (info), 3996 h) 3997 || (bfd_link_pic (info) 3998 && SYMBOL_REFERENCES_LOCAL (info, h)) 3999 || ((ELF_ST_VISIBILITY (h->other) 4000 || resolved_to_zero) 4001 && h->root.type == bfd_link_hash_undefweak)) 4002 { 4003 /* This is actually a static link, or it is a -Bsymbolic 4004 link and the symbol is defined locally. We must 4005 initialize this entry in the global offset table. 4006 Since the offset must always be a multiple of 4, we 4007 use the least significant bit to record whether we 4008 have initialized it already. 4009 4010 When doing a dynamic link, we create a .rela.got 4011 relocation entry to initialize the value. This is 4012 done in the finish_dynamic_symbol routine. */ 4013 if ((off & 1) != 0) 4014 off &= ~1; 4015 else 4016 { 4017 bfd_put_32 (output_bfd, relocation, 4018 sgot->contents + off); 4019 h->got.offset |= 1; 4020 } 4021 } 4022 else 4023 unresolved_reloc = FALSE; 4024 } 4025 else 4026 { 4027 BFD_ASSERT (local_got_offsets != NULL 4028 && local_got_offsets[r_symndx] != (bfd_vma) -1); 4029 4030 off = local_got_offsets[r_symndx]; 4031 4032 /* The offset must always be a multiple of 4. We use the 4033 least significant bit to record whether we have already 4034 generated the necessary reloc. */ 4035 if ((off & 1) != 0) 4036 off &= ~1; 4037 else 4038 { 4039 bfd_put_32 (output_bfd, relocation, 4040 sgot->contents + off); 4041 4042 if (bfd_link_pic (info)) 4043 { 4044 asection *srelgot; 4045 Elf_Internal_Rela outrel; 4046 bfd_byte *loc; 4047 4048 srelgot = htab->root.srelgot; 4049 BFD_ASSERT (srelgot != NULL); 4050 4051 outrel.r_addend = relocation; 4052 outrel.r_offset = (sgot->output_section->vma 4053 + sgot->output_offset 4054 + off); 4055 outrel.r_info = ELF32_R_INFO (0, R_NIOS2_RELATIVE); 4056 loc = srelgot->contents; 4057 loc += (srelgot->reloc_count++ * 4058 sizeof (Elf32_External_Rela)); 4059 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 4060 } 4061 4062 local_got_offsets[r_symndx] |= 1; 4063 } 4064 } 4065 4066 if (use_plt && bfd_link_pic (info)) 4067 { 4068 off = ((h->plt.offset - 24) / 12 + 3) * 4; 4069 relocation = (htab->root.sgotplt->output_offset + off 4070 - got_base); 4071 } 4072 else 4073 relocation = sgot->output_offset + off - got_base; 4074 4075 /* This relocation does not use the addend. */ 4076 rel->r_addend = 0; 4077 4078 switch (howto->type) 4079 { 4080 case R_NIOS2_GOT_LO: 4081 case R_NIOS2_CALL_LO: 4082 r = nios2_elf32_do_lo16_relocate (input_bfd, howto, 4083 input_section, contents, 4084 rel->r_offset, relocation, 4085 rel->r_addend); 4086 break; 4087 case R_NIOS2_GOT_HA: 4088 case R_NIOS2_CALL_HA: 4089 r = nios2_elf32_do_hiadj16_relocate (input_bfd, howto, 4090 input_section, contents, 4091 rel->r_offset, 4092 relocation, 4093 rel->r_addend); 4094 break; 4095 default: 4096 r = _bfd_final_link_relocate (howto, input_bfd, 4097 input_section, contents, 4098 rel->r_offset, relocation, 4099 rel->r_addend); 4100 break; 4101 } 4102 break; 4103 4104 case R_NIOS2_GOTOFF_LO: 4105 case R_NIOS2_GOTOFF_HA: 4106 case R_NIOS2_GOTOFF: 4107 /* Relocation is relative to the global offset table pointer. */ 4108 4109 BFD_ASSERT (sgot != NULL); 4110 if (sgot == NULL) 4111 { 4112 r = bfd_reloc_notsupported; 4113 break; 4114 } 4115 4116 /* Note that sgot->output_offset is not involved in this 4117 calculation. We always want the start of .got. */ 4118 relocation -= sgot->output_section->vma; 4119 4120 /* Now we adjust the relocation to be relative to the GOT pointer 4121 (the _gp_got symbol), which possibly contains the 0x8000 bias. */ 4122 relocation -= got_base; 4123 4124 switch (howto->type) 4125 { 4126 case R_NIOS2_GOTOFF_LO: 4127 r = nios2_elf32_do_lo16_relocate (input_bfd, howto, 4128 input_section, contents, 4129 rel->r_offset, relocation, 4130 rel->r_addend); 4131 break; 4132 case R_NIOS2_GOTOFF_HA: 4133 r = nios2_elf32_do_hiadj16_relocate (input_bfd, howto, 4134 input_section, contents, 4135 rel->r_offset, 4136 relocation, 4137 rel->r_addend); 4138 break; 4139 default: 4140 r = _bfd_final_link_relocate (howto, input_bfd, 4141 input_section, contents, 4142 rel->r_offset, relocation, 4143 rel->r_addend); 4144 break; 4145 } 4146 break; 4147 4148 case R_NIOS2_TLS_LDO16: 4149 relocation -= dtpoff_base (info) + DTP_OFFSET; 4150 4151 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 4152 contents, rel->r_offset, 4153 relocation, rel->r_addend); 4154 break; 4155 case R_NIOS2_TLS_LDM16: 4156 if (htab->root.sgot == NULL) 4157 abort (); 4158 4159 off = htab->tls_ldm_got.offset; 4160 4161 if ((off & 1) != 0) 4162 off &= ~1; 4163 else 4164 { 4165 /* If we don't know the module number, create a relocation 4166 for it. */ 4167 if (bfd_link_pic (info)) 4168 { 4169 Elf_Internal_Rela outrel; 4170 bfd_byte *loc; 4171 4172 if (htab->root.srelgot == NULL) 4173 abort (); 4174 4175 outrel.r_addend = 0; 4176 outrel.r_offset = (htab->root.sgot->output_section->vma 4177 + htab->root.sgot->output_offset 4178 + off); 4179 outrel.r_info = ELF32_R_INFO (0, R_NIOS2_TLS_DTPMOD); 4180 4181 loc = htab->root.srelgot->contents; 4182 loc += (htab->root.srelgot->reloc_count++ 4183 * sizeof (Elf32_External_Rela)); 4184 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 4185 } 4186 else 4187 bfd_put_32 (output_bfd, 1, 4188 htab->root.sgot->contents + off); 4189 4190 htab->tls_ldm_got.offset |= 1; 4191 } 4192 4193 relocation = htab->root.sgot->output_offset + off - got_base; 4194 4195 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 4196 contents, rel->r_offset, 4197 relocation, rel->r_addend); 4198 4199 break; 4200 case R_NIOS2_TLS_GD16: 4201 case R_NIOS2_TLS_IE16: 4202 { 4203 int indx; 4204 char tls_type; 4205 4206 if (htab->root.sgot == NULL) 4207 abort (); 4208 4209 indx = 0; 4210 if (h != NULL) 4211 { 4212 bfd_boolean dyn; 4213 dyn = htab->root.dynamic_sections_created; 4214 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 4215 bfd_link_pic (info), 4216 h) 4217 && (!bfd_link_pic (info) 4218 || !SYMBOL_REFERENCES_LOCAL (info, h))) 4219 { 4220 unresolved_reloc = FALSE; 4221 indx = h->dynindx; 4222 } 4223 off = h->got.offset; 4224 tls_type = (((struct elf32_nios2_link_hash_entry *) h) 4225 ->tls_type); 4226 } 4227 else 4228 { 4229 if (local_got_offsets == NULL) 4230 abort (); 4231 off = local_got_offsets[r_symndx]; 4232 tls_type = (elf32_nios2_local_got_tls_type (input_bfd) 4233 [r_symndx]); 4234 } 4235 4236 if (tls_type == GOT_UNKNOWN) 4237 abort (); 4238 4239 if ((off & 1) != 0) 4240 off &= ~1; 4241 else 4242 { 4243 bfd_boolean need_relocs = FALSE; 4244 Elf_Internal_Rela outrel; 4245 bfd_byte *loc = NULL; 4246 int cur_off = off; 4247 4248 /* The GOT entries have not been initialized yet. Do it 4249 now, and emit any relocations. If both an IE GOT and a 4250 GD GOT are necessary, we emit the GD first. */ 4251 4252 if ((bfd_link_pic (info) || indx != 0) 4253 && (h == NULL 4254 || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 4255 && !resolved_to_zero) 4256 || h->root.type != bfd_link_hash_undefweak)) 4257 { 4258 need_relocs = TRUE; 4259 if (htab->root.srelgot == NULL) 4260 abort (); 4261 loc = htab->root.srelgot->contents; 4262 loc += (htab->root.srelgot->reloc_count * 4263 sizeof (Elf32_External_Rela)); 4264 } 4265 4266 if (tls_type & GOT_TLS_GD) 4267 { 4268 if (need_relocs) 4269 { 4270 outrel.r_addend = 0; 4271 outrel.r_offset = (htab->root.sgot->output_section->vma 4272 + htab->root.sgot->output_offset 4273 + cur_off); 4274 outrel.r_info = ELF32_R_INFO (indx, 4275 R_NIOS2_TLS_DTPMOD); 4276 4277 bfd_elf32_swap_reloca_out (output_bfd, &outrel, 4278 loc); 4279 htab->root.srelgot->reloc_count++; 4280 loc += sizeof (Elf32_External_Rela); 4281 4282 if (indx == 0) 4283 bfd_put_32 (output_bfd, 4284 (relocation - dtpoff_base (info) - 4285 DTP_OFFSET), 4286 htab->root.sgot->contents + cur_off + 4); 4287 else 4288 { 4289 outrel.r_addend = 0; 4290 outrel.r_info = ELF32_R_INFO (indx, 4291 R_NIOS2_TLS_DTPREL); 4292 outrel.r_offset += 4; 4293 4294 bfd_elf32_swap_reloca_out (output_bfd, &outrel, 4295 loc); 4296 htab->root.srelgot->reloc_count++; 4297 loc += sizeof (Elf32_External_Rela); 4298 } 4299 } 4300 else 4301 { 4302 /* If we are not emitting relocations for a 4303 general dynamic reference, then we must be in a 4304 static link or an executable link with the 4305 symbol binding locally. Mark it as belonging 4306 to module 1, the executable. */ 4307 bfd_put_32 (output_bfd, 1, 4308 htab->root.sgot->contents + cur_off); 4309 bfd_put_32 (output_bfd, (relocation - 4310 dtpoff_base (info) - 4311 DTP_OFFSET), 4312 htab->root.sgot->contents + cur_off + 4); 4313 } 4314 4315 cur_off += 8; 4316 } 4317 4318 if (tls_type & GOT_TLS_IE) 4319 { 4320 if (need_relocs) 4321 { 4322 if (indx == 0) 4323 outrel.r_addend = (relocation - 4324 dtpoff_base (info)); 4325 else 4326 outrel.r_addend = 0; 4327 outrel.r_offset = (htab->root.sgot->output_section->vma 4328 + htab->root.sgot->output_offset 4329 + cur_off); 4330 outrel.r_info = ELF32_R_INFO (indx, 4331 R_NIOS2_TLS_TPREL); 4332 4333 bfd_elf32_swap_reloca_out (output_bfd, &outrel, 4334 loc); 4335 htab->root.srelgot->reloc_count++; 4336 loc += sizeof (Elf32_External_Rela); 4337 } 4338 else 4339 bfd_put_32 (output_bfd, (tpoff (info, relocation) 4340 - TP_OFFSET), 4341 htab->root.sgot->contents + cur_off); 4342 cur_off += 4; 4343 } 4344 4345 if (h != NULL) 4346 h->got.offset |= 1; 4347 else 4348 local_got_offsets[r_symndx] |= 1; 4349 } 4350 4351 if ((tls_type & GOT_TLS_GD) && r_type != R_NIOS2_TLS_GD16) 4352 off += 8; 4353 relocation = htab->root.sgot->output_offset + off - got_base; 4354 4355 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 4356 contents, rel->r_offset, 4357 relocation, rel->r_addend); 4358 } 4359 4360 break; 4361 case R_NIOS2_TLS_LE16: 4362 if (bfd_link_dll (info)) 4363 { 4364 _bfd_error_handler 4365 /* xgettext:c-format */ 4366 (_("%pB(%pA+%#" PRIx64 "): %s relocation not " 4367 "permitted in shared object"), 4368 input_bfd, input_section, 4369 (uint64_t) rel->r_offset, howto->name); 4370 return FALSE; 4371 } 4372 else 4373 relocation = tpoff (info, relocation) - TP_OFFSET; 4374 4375 r = _bfd_final_link_relocate (howto, input_bfd, input_section, 4376 contents, rel->r_offset, 4377 relocation, rel->r_addend); 4378 break; 4379 4380 case R_NIOS2_BFD_RELOC_32: 4381 if (bfd_link_pic (info) 4382 && (input_section->flags & SEC_ALLOC) != 0 4383 && (h == NULL 4384 || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 4385 && !resolved_to_zero) 4386 || h->root.type != bfd_link_hash_undefweak)) 4387 { 4388 Elf_Internal_Rela outrel; 4389 bfd_byte *loc; 4390 bfd_boolean skip, relocate; 4391 4392 /* When generating a shared object, these relocations 4393 are copied into the output file to be resolved at run 4394 time. */ 4395 4396 skip = FALSE; 4397 relocate = FALSE; 4398 4399 outrel.r_offset 4400 = _bfd_elf_section_offset (output_bfd, info, 4401 input_section, rel->r_offset); 4402 if (outrel.r_offset == (bfd_vma) -1) 4403 skip = TRUE; 4404 else if (outrel.r_offset == (bfd_vma) -2) 4405 skip = TRUE, relocate = TRUE; 4406 outrel.r_offset += (input_section->output_section->vma 4407 + input_section->output_offset); 4408 4409 if (skip) 4410 memset (&outrel, 0, sizeof outrel); 4411 else if (h != NULL 4412 && h->dynindx != -1 4413 && (!bfd_link_pic (info) 4414 || !SYMBOLIC_BIND (info, h) 4415 || !h->def_regular)) 4416 { 4417 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); 4418 outrel.r_addend = rel->r_addend; 4419 } 4420 else 4421 { 4422 /* This symbol is local, or marked to become local. */ 4423 outrel.r_addend = relocation + rel->r_addend; 4424 relocate = TRUE; 4425 outrel.r_info = ELF32_R_INFO (0, R_NIOS2_RELATIVE); 4426 } 4427 4428 sreloc = elf_section_data (input_section)->sreloc; 4429 if (sreloc == NULL) 4430 abort (); 4431 4432 loc = sreloc->contents; 4433 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); 4434 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 4435 4436 /* This reloc will be computed at runtime, so there's no 4437 need to do anything now, except for R_NIOS2_BFD_RELOC_32 4438 relocations that have been turned into 4439 R_NIOS2_RELATIVE. */ 4440 if (!relocate) 4441 break; 4442 } 4443 4444 r = _bfd_final_link_relocate (howto, input_bfd, 4445 input_section, contents, 4446 rel->r_offset, relocation, 4447 rel->r_addend); 4448 break; 4449 4450 case R_NIOS2_TLS_DTPREL: 4451 relocation -= dtpoff_base (info); 4452 /* Fall through. */ 4453 4454 default: 4455 r = _bfd_final_link_relocate (howto, input_bfd, 4456 input_section, contents, 4457 rel->r_offset, relocation, 4458 rel->r_addend); 4459 break; 4460 } 4461 } 4462 else 4463 r = bfd_reloc_notsupported; 4464 4465 if (r != bfd_reloc_ok) 4466 { 4467 if (h != NULL) 4468 name = h->root.root.string; 4469 else 4470 { 4471 name = bfd_elf_string_from_elf_section (input_bfd, 4472 symtab_hdr->sh_link, 4473 sym->st_name); 4474 if (name == NULL || *name == '\0') 4475 name = bfd_section_name (input_bfd, sec); 4476 } 4477 4478 switch (r) 4479 { 4480 case bfd_reloc_overflow: 4481 (*info->callbacks->reloc_overflow) (info, NULL, name, 4482 howto->name, (bfd_vma) 0, 4483 input_bfd, input_section, 4484 rel->r_offset); 4485 break; 4486 4487 case bfd_reloc_undefined: 4488 (*info->callbacks->undefined_symbol) (info, name, input_bfd, 4489 input_section, 4490 rel->r_offset, TRUE); 4491 break; 4492 4493 case bfd_reloc_outofrange: 4494 if (msg == NULL) 4495 msg = _("relocation out of range"); 4496 break; 4497 4498 case bfd_reloc_notsupported: 4499 if (msg == NULL) 4500 msg = _("unsupported relocation"); 4501 break; 4502 4503 case bfd_reloc_dangerous: 4504 if (msg == NULL) 4505 msg = _("dangerous relocation"); 4506 break; 4507 4508 default: 4509 if (msg == NULL) 4510 msg = _("unknown error"); 4511 break; 4512 } 4513 4514 if (msg) 4515 { 4516 (*info->callbacks->warning) (info, msg, name, input_bfd, 4517 input_section, rel->r_offset); 4518 return FALSE; 4519 } 4520 } 4521 } 4522 return TRUE; 4523 } 4524 4525 /* Implement elf-backend_section_flags: 4526 Convert NIOS2 specific section flags to bfd internal section flags. */ 4527 static bfd_boolean 4528 nios2_elf32_section_flags (flagword *flags, const Elf_Internal_Shdr *hdr) 4529 { 4530 if (hdr->sh_flags & SHF_NIOS2_GPREL) 4531 *flags |= SEC_SMALL_DATA; 4532 4533 return TRUE; 4534 } 4535 4536 /* Implement elf_backend_fake_sections: 4537 Set the correct type for an NIOS2 ELF section. We do this by the 4538 section name, which is a hack, but ought to work. */ 4539 static bfd_boolean 4540 nios2_elf32_fake_sections (bfd *abfd ATTRIBUTE_UNUSED, 4541 Elf_Internal_Shdr *hdr, asection *sec) 4542 { 4543 register const char *name = bfd_get_section_name (abfd, sec); 4544 4545 if ((sec->flags & SEC_SMALL_DATA) 4546 || strcmp (name, ".sdata") == 0 4547 || strcmp (name, ".sbss") == 0 4548 || strcmp (name, ".lit4") == 0 || strcmp (name, ".lit8") == 0) 4549 hdr->sh_flags |= SHF_NIOS2_GPREL; 4550 4551 return TRUE; 4552 } 4553 4554 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up 4555 shortcuts to them in our hash table. */ 4556 static bfd_boolean 4557 create_got_section (bfd *dynobj, struct bfd_link_info *info) 4558 { 4559 struct elf32_nios2_link_hash_table *htab; 4560 struct elf_link_hash_entry *h; 4561 4562 htab = elf32_nios2_hash_table (info); 4563 4564 if (! _bfd_elf_create_got_section (dynobj, info)) 4565 return FALSE; 4566 4567 /* In order for the two loads in .PLTresolve to share the same %hiadj, 4568 _GLOBAL_OFFSET_TABLE_ must be aligned to a 16-byte boundary. */ 4569 if (!bfd_set_section_alignment (dynobj, htab->root.sgotplt, 4)) 4570 return FALSE; 4571 4572 /* The Nios II ABI specifies that GOT-relative relocations are relative 4573 to the linker-created symbol _gp_got, rather than using 4574 _GLOBAL_OFFSET_TABLE_ directly. In particular, the latter always 4575 points to the base of the GOT while _gp_got may include a bias. */ 4576 h = _bfd_elf_define_linkage_sym (dynobj, info, htab->root.sgotplt, 4577 "_gp_got"); 4578 htab->h_gp_got = h; 4579 if (h == NULL) 4580 return FALSE; 4581 4582 return TRUE; 4583 } 4584 4585 /* Implement elf_backend_create_dynamic_sections: 4586 Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and 4587 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our 4588 hash table. */ 4589 static bfd_boolean 4590 nios2_elf32_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info) 4591 { 4592 struct elf32_nios2_link_hash_table *htab; 4593 4594 htab = elf32_nios2_hash_table (info); 4595 if (!htab->root.sgot && !create_got_section (dynobj, info)) 4596 return FALSE; 4597 4598 if (!_bfd_elf_create_dynamic_sections (dynobj, info)) 4599 return FALSE; 4600 4601 /* In order for the two loads in a shared object .PLTresolve to share the 4602 same %hiadj, the start of the PLT (as well as the GOT) must be aligned 4603 to a 16-byte boundary. This is because the addresses for these loads 4604 include the -(.plt+4) PIC correction. */ 4605 return bfd_set_section_alignment (dynobj, htab->root.splt, 4); 4606 } 4607 4608 /* Implement elf_backend_copy_indirect_symbol: 4609 Copy the extra info we tack onto an elf_link_hash_entry. */ 4610 static void 4611 nios2_elf32_copy_indirect_symbol (struct bfd_link_info *info, 4612 struct elf_link_hash_entry *dir, 4613 struct elf_link_hash_entry *ind) 4614 { 4615 struct elf32_nios2_link_hash_entry *edir, *eind; 4616 4617 edir = (struct elf32_nios2_link_hash_entry *) dir; 4618 eind = (struct elf32_nios2_link_hash_entry *) ind; 4619 4620 if (eind->dyn_relocs != NULL) 4621 { 4622 if (edir->dyn_relocs != NULL) 4623 { 4624 struct elf_dyn_relocs **pp; 4625 struct elf_dyn_relocs *p; 4626 4627 /* Add reloc counts against the indirect sym to the direct sym 4628 list. Merge any entries against the same section. */ 4629 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) 4630 { 4631 struct elf_dyn_relocs *q; 4632 4633 for (q = edir->dyn_relocs; q != NULL; q = q->next) 4634 if (q->sec == p->sec) 4635 { 4636 q->pc_count += p->pc_count; 4637 q->count += p->count; 4638 *pp = p->next; 4639 break; 4640 } 4641 if (q == NULL) 4642 pp = &p->next; 4643 } 4644 *pp = edir->dyn_relocs; 4645 } 4646 4647 edir->dyn_relocs = eind->dyn_relocs; 4648 eind->dyn_relocs = NULL; 4649 } 4650 4651 if (ind->root.type == bfd_link_hash_indirect 4652 && dir->got.refcount <= 0) 4653 { 4654 edir->tls_type = eind->tls_type; 4655 eind->tls_type = GOT_UNKNOWN; 4656 } 4657 4658 edir->got_types_used |= eind->got_types_used; 4659 4660 _bfd_elf_link_hash_copy_indirect (info, dir, ind); 4661 } 4662 4663 /* Set the right machine number for a NIOS2 ELF file. */ 4664 4665 static bfd_boolean 4666 nios2_elf32_object_p (bfd *abfd) 4667 { 4668 unsigned long mach; 4669 4670 mach = elf_elfheader (abfd)->e_flags; 4671 4672 switch (mach) 4673 { 4674 default: 4675 case EF_NIOS2_ARCH_R1: 4676 bfd_default_set_arch_mach (abfd, bfd_arch_nios2, bfd_mach_nios2r1); 4677 break; 4678 case EF_NIOS2_ARCH_R2: 4679 bfd_default_set_arch_mach (abfd, bfd_arch_nios2, bfd_mach_nios2r2); 4680 break; 4681 } 4682 4683 return TRUE; 4684 } 4685 4686 /* Implement elf_backend_check_relocs: 4687 Look through the relocs for a section during the first phase. */ 4688 static bfd_boolean 4689 nios2_elf32_check_relocs (bfd *abfd, struct bfd_link_info *info, 4690 asection *sec, const Elf_Internal_Rela *relocs) 4691 { 4692 Elf_Internal_Shdr *symtab_hdr; 4693 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; 4694 const Elf_Internal_Rela *rel; 4695 const Elf_Internal_Rela *rel_end; 4696 struct elf32_nios2_link_hash_table *htab; 4697 asection *sreloc = NULL; 4698 bfd_signed_vma *local_got_refcounts; 4699 4700 if (bfd_link_relocatable (info)) 4701 return TRUE; 4702 4703 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 4704 sym_hashes = elf_sym_hashes (abfd); 4705 sym_hashes_end = (sym_hashes 4706 + symtab_hdr->sh_size / sizeof (Elf32_External_Sym)); 4707 if (!elf_bad_symtab (abfd)) 4708 sym_hashes_end -= symtab_hdr->sh_info; 4709 local_got_refcounts = elf_local_got_refcounts (abfd); 4710 4711 htab = elf32_nios2_hash_table (info); 4712 4713 rel_end = relocs + sec->reloc_count; 4714 for (rel = relocs; rel < rel_end; rel++) 4715 { 4716 unsigned int r_type; 4717 struct elf_link_hash_entry *h; 4718 unsigned long r_symndx; 4719 4720 r_symndx = ELF32_R_SYM (rel->r_info); 4721 if (r_symndx < symtab_hdr->sh_info) 4722 h = NULL; 4723 else 4724 { 4725 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 4726 while (h->root.type == bfd_link_hash_indirect 4727 || h->root.type == bfd_link_hash_warning) 4728 h = (struct elf_link_hash_entry *) h->root.u.i.link; 4729 } 4730 4731 r_type = ELF32_R_TYPE (rel->r_info); 4732 4733 switch (r_type) 4734 { 4735 case R_NIOS2_GOT16: 4736 case R_NIOS2_GOT_LO: 4737 case R_NIOS2_GOT_HA: 4738 case R_NIOS2_CALL16: 4739 case R_NIOS2_CALL_LO: 4740 case R_NIOS2_CALL_HA: 4741 case R_NIOS2_TLS_GD16: 4742 case R_NIOS2_TLS_IE16: 4743 /* This symbol requires a global offset table entry. */ 4744 { 4745 int tls_type, old_tls_type; 4746 4747 switch (r_type) 4748 { 4749 default: 4750 case R_NIOS2_GOT16: 4751 case R_NIOS2_GOT_LO: 4752 case R_NIOS2_GOT_HA: 4753 case R_NIOS2_CALL16: 4754 case R_NIOS2_CALL_LO: 4755 case R_NIOS2_CALL_HA: 4756 tls_type = GOT_NORMAL; 4757 break; 4758 case R_NIOS2_TLS_GD16: 4759 tls_type = GOT_TLS_GD; 4760 break; 4761 case R_NIOS2_TLS_IE16: 4762 tls_type = GOT_TLS_IE; 4763 break; 4764 } 4765 4766 if (h != NULL) 4767 { 4768 struct elf32_nios2_link_hash_entry *eh 4769 = (struct elf32_nios2_link_hash_entry *)h; 4770 h->got.refcount++; 4771 old_tls_type = elf32_nios2_hash_entry(h)->tls_type; 4772 if (r_type == R_NIOS2_CALL16 4773 || r_type == R_NIOS2_CALL_LO 4774 || r_type == R_NIOS2_CALL_HA) 4775 { 4776 /* Make sure a plt entry is created for this symbol if 4777 it turns out to be a function defined by a dynamic 4778 object. */ 4779 h->plt.refcount++; 4780 h->needs_plt = 1; 4781 h->type = STT_FUNC; 4782 eh->got_types_used |= CALL_USED; 4783 } 4784 else 4785 eh->got_types_used |= GOT_USED; 4786 } 4787 else 4788 { 4789 /* This is a global offset table entry for a local symbol. */ 4790 if (local_got_refcounts == NULL) 4791 { 4792 bfd_size_type size; 4793 4794 size = symtab_hdr->sh_info; 4795 size *= (sizeof (bfd_signed_vma) + sizeof (char)); 4796 local_got_refcounts 4797 = ((bfd_signed_vma *) bfd_zalloc (abfd, size)); 4798 if (local_got_refcounts == NULL) 4799 return FALSE; 4800 elf_local_got_refcounts (abfd) = local_got_refcounts; 4801 elf32_nios2_local_got_tls_type (abfd) 4802 = (char *) (local_got_refcounts + symtab_hdr->sh_info); 4803 } 4804 local_got_refcounts[r_symndx]++; 4805 old_tls_type = elf32_nios2_local_got_tls_type (abfd) [r_symndx]; 4806 } 4807 4808 /* We will already have issued an error message if there is a 4809 TLS / non-TLS mismatch, based on the symbol type. We don't 4810 support any linker relaxations. So just combine any TLS 4811 types needed. */ 4812 if (old_tls_type != GOT_UNKNOWN && old_tls_type != GOT_NORMAL 4813 && tls_type != GOT_NORMAL) 4814 tls_type |= old_tls_type; 4815 4816 if (old_tls_type != tls_type) 4817 { 4818 if (h != NULL) 4819 elf32_nios2_hash_entry (h)->tls_type = tls_type; 4820 else 4821 elf32_nios2_local_got_tls_type (abfd) [r_symndx] = tls_type; 4822 } 4823 } 4824 make_got: 4825 if (htab->root.sgot == NULL) 4826 { 4827 if (htab->root.dynobj == NULL) 4828 htab->root.dynobj = abfd; 4829 if (!create_got_section (htab->root.dynobj, info)) 4830 return FALSE; 4831 } 4832 break; 4833 4834 case R_NIOS2_TLS_LDM16: 4835 htab->tls_ldm_got.refcount++; 4836 goto make_got; 4837 4838 /* This relocation describes the C++ object vtable hierarchy. 4839 Reconstruct it for later use during GC. */ 4840 case R_NIOS2_GNU_VTINHERIT: 4841 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 4842 return FALSE; 4843 break; 4844 4845 /* This relocation describes which C++ vtable entries are actually 4846 used. Record for later use during GC. */ 4847 case R_NIOS2_GNU_VTENTRY: 4848 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 4849 return FALSE; 4850 break; 4851 4852 case R_NIOS2_BFD_RELOC_32: 4853 case R_NIOS2_CALL26: 4854 case R_NIOS2_CALL26_NOAT: 4855 case R_NIOS2_HIADJ16: 4856 case R_NIOS2_LO16: 4857 4858 if (h != NULL) 4859 { 4860 /* If this reloc is in a read-only section, we might 4861 need a copy reloc. We can't check reliably at this 4862 stage whether the section is read-only, as input 4863 sections have not yet been mapped to output sections. 4864 Tentatively set the flag for now, and correct in 4865 adjust_dynamic_symbol. */ 4866 if (!bfd_link_pic (info)) 4867 h->non_got_ref = 1; 4868 4869 /* Make sure a plt entry is created for this symbol if it 4870 turns out to be a function defined by a dynamic object. */ 4871 h->plt.refcount++; 4872 4873 if (r_type == R_NIOS2_CALL26 || r_type == R_NIOS2_CALL26_NOAT) 4874 h->needs_plt = 1; 4875 } 4876 4877 /* If we are creating a shared library, we need to copy the 4878 reloc into the shared library. */ 4879 if (bfd_link_pic (info) 4880 && (sec->flags & SEC_ALLOC) != 0 4881 && (r_type == R_NIOS2_BFD_RELOC_32 4882 || (h != NULL && ! h->needs_plt 4883 && (! SYMBOLIC_BIND (info, h) || ! h->def_regular)))) 4884 { 4885 struct elf_dyn_relocs *p; 4886 struct elf_dyn_relocs **head; 4887 4888 /* When creating a shared object, we must copy these 4889 reloc types into the output file. We create a reloc 4890 section in dynobj and make room for this reloc. */ 4891 if (sreloc == NULL) 4892 { 4893 if (htab->root.dynobj == NULL) 4894 htab->root.dynobj = abfd; 4895 4896 sreloc = _bfd_elf_make_dynamic_reloc_section 4897 (sec, htab->root.dynobj, 2, abfd, TRUE); 4898 if (sreloc == NULL) 4899 return FALSE; 4900 } 4901 4902 /* If this is a global symbol, we count the number of 4903 relocations we need for this symbol. */ 4904 if (h != NULL) 4905 head = &((struct elf32_nios2_link_hash_entry *) h)->dyn_relocs; 4906 else 4907 { 4908 /* Track dynamic relocs needed for local syms too. 4909 We really need local syms available to do this 4910 easily. Oh well. */ 4911 4912 asection *s; 4913 void *vpp; 4914 Elf_Internal_Sym *isym; 4915 4916 isym = bfd_sym_from_r_symndx (&htab->sym_cache, 4917 abfd, r_symndx); 4918 if (isym == NULL) 4919 return FALSE; 4920 4921 s = bfd_section_from_elf_index (abfd, isym->st_shndx); 4922 if (s == NULL) 4923 s = sec; 4924 4925 vpp = &elf_section_data (s)->local_dynrel; 4926 head = (struct elf_dyn_relocs **) vpp; 4927 } 4928 4929 p = *head; 4930 if (p == NULL || p->sec != sec) 4931 { 4932 bfd_size_type amt = sizeof *p; 4933 p = ((struct elf_dyn_relocs *) 4934 bfd_alloc (htab->root.dynobj, amt)); 4935 if (p == NULL) 4936 return FALSE; 4937 p->next = *head; 4938 *head = p; 4939 p->sec = sec; 4940 p->count = 0; 4941 p->pc_count = 0; 4942 } 4943 4944 p->count += 1; 4945 4946 } 4947 break; 4948 } 4949 } 4950 4951 return TRUE; 4952 } 4953 4954 4955 /* Implement elf_backend_gc_mark_hook: 4956 Return the section that should be marked against GC for a given 4957 relocation. */ 4958 static asection * 4959 nios2_elf32_gc_mark_hook (asection *sec, 4960 struct bfd_link_info *info, 4961 Elf_Internal_Rela *rel, 4962 struct elf_link_hash_entry *h, 4963 Elf_Internal_Sym *sym) 4964 { 4965 if (h != NULL) 4966 switch (ELF32_R_TYPE (rel->r_info)) 4967 { 4968 case R_NIOS2_GNU_VTINHERIT: 4969 case R_NIOS2_GNU_VTENTRY: 4970 return NULL; 4971 } 4972 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 4973 } 4974 4975 /* Implement elf_backend_finish_dynamic_symbols: 4976 Finish up dynamic symbol handling. We set the contents of various 4977 dynamic sections here. */ 4978 static bfd_boolean 4979 nios2_elf32_finish_dynamic_symbol (bfd *output_bfd, 4980 struct bfd_link_info *info, 4981 struct elf_link_hash_entry *h, 4982 Elf_Internal_Sym *sym) 4983 { 4984 struct elf32_nios2_link_hash_table *htab; 4985 struct elf32_nios2_link_hash_entry *eh 4986 = (struct elf32_nios2_link_hash_entry *)h; 4987 int use_plt; 4988 4989 htab = elf32_nios2_hash_table (info); 4990 4991 if (h->plt.offset != (bfd_vma) -1) 4992 { 4993 asection *splt; 4994 asection *sgotplt; 4995 asection *srela; 4996 bfd_vma plt_index; 4997 bfd_vma got_offset; 4998 Elf_Internal_Rela rela; 4999 bfd_byte *loc; 5000 bfd_vma got_address; 5001 5002 /* This symbol has an entry in the procedure linkage table. Set 5003 it up. */ 5004 BFD_ASSERT (h->dynindx != -1); 5005 splt = htab->root.splt; 5006 sgotplt = htab->root.sgotplt; 5007 srela = htab->root.srelplt; 5008 BFD_ASSERT (splt != NULL && sgotplt != NULL && srela != NULL); 5009 5010 /* Emit the PLT entry. */ 5011 if (bfd_link_pic (info)) 5012 { 5013 nios2_elf32_install_data (splt, nios2_so_plt_entry, h->plt.offset, 5014 3); 5015 plt_index = (h->plt.offset - 24) / 12; 5016 got_offset = (plt_index + 3) * 4; 5017 nios2_elf32_install_imm16 (splt, h->plt.offset, 5018 hiadj(plt_index * 4)); 5019 nios2_elf32_install_imm16 (splt, h->plt.offset + 4, 5020 (plt_index * 4) & 0xffff); 5021 nios2_elf32_install_imm16 (splt, h->plt.offset + 8, 5022 0xfff4 - h->plt.offset); 5023 got_address = (sgotplt->output_section->vma + sgotplt->output_offset 5024 + got_offset); 5025 5026 /* Fill in the entry in the global offset table. There are no 5027 res_n slots for a shared object PLT, instead the .got.plt entries 5028 point to the PLT entries. */ 5029 bfd_put_32 (output_bfd, 5030 splt->output_section->vma + splt->output_offset 5031 + h->plt.offset, sgotplt->contents + got_offset); 5032 } 5033 else 5034 { 5035 plt_index = (h->plt.offset - 28 - htab->res_n_size) / 12; 5036 got_offset = (plt_index + 3) * 4; 5037 5038 nios2_elf32_install_data (splt, nios2_plt_entry, h->plt.offset, 3); 5039 got_address = (sgotplt->output_section->vma + sgotplt->output_offset 5040 + got_offset); 5041 nios2_elf32_install_imm16 (splt, h->plt.offset, hiadj(got_address)); 5042 nios2_elf32_install_imm16 (splt, h->plt.offset + 4, 5043 got_address & 0xffff); 5044 5045 /* Fill in the entry in the global offset table. */ 5046 bfd_put_32 (output_bfd, 5047 splt->output_section->vma + splt->output_offset 5048 + plt_index * 4, sgotplt->contents + got_offset); 5049 } 5050 5051 /* Fill in the entry in the .rela.plt section. */ 5052 rela.r_offset = got_address; 5053 rela.r_info = ELF32_R_INFO (h->dynindx, R_NIOS2_JUMP_SLOT); 5054 rela.r_addend = 0; 5055 loc = srela->contents + plt_index * sizeof (Elf32_External_Rela); 5056 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 5057 5058 if (!h->def_regular) 5059 { 5060 /* Mark the symbol as undefined, rather than as defined in 5061 the .plt section. Leave the value alone. */ 5062 sym->st_shndx = SHN_UNDEF; 5063 /* If the symbol is weak, we do need to clear the value. 5064 Otherwise, the PLT entry would provide a definition for 5065 the symbol even if the symbol wasn't defined anywhere, 5066 and so the symbol would never be NULL. */ 5067 if (!h->ref_regular_nonweak) 5068 sym->st_value = 0; 5069 } 5070 } 5071 5072 use_plt = (eh->got_types_used == CALL_USED 5073 && h->plt.offset != (bfd_vma) -1); 5074 5075 if (!use_plt && h->got.offset != (bfd_vma) -1 5076 && (elf32_nios2_hash_entry (h)->tls_type & GOT_TLS_GD) == 0 5077 && (elf32_nios2_hash_entry (h)->tls_type & GOT_TLS_IE) == 0) 5078 { 5079 asection *sgot; 5080 asection *srela; 5081 Elf_Internal_Rela rela; 5082 bfd_byte *loc; 5083 bfd_vma offset; 5084 5085 /* This symbol has an entry in the global offset table. Set it 5086 up. */ 5087 sgot = htab->root.sgot; 5088 srela = htab->root.srelgot; 5089 BFD_ASSERT (sgot != NULL && srela != NULL); 5090 5091 offset = (h->got.offset & ~(bfd_vma) 1); 5092 rela.r_offset = (sgot->output_section->vma 5093 + sgot->output_offset + offset); 5094 5095 /* If this is a -Bsymbolic link, and the symbol is defined 5096 locally, we just want to emit a RELATIVE reloc. Likewise if 5097 the symbol was forced to be local because of a version file. 5098 The entry in the global offset table will already have been 5099 initialized in the relocate_section function. */ 5100 5101 if (bfd_link_pic (info) && SYMBOL_REFERENCES_LOCAL (info, h)) 5102 { 5103 rela.r_info = ELF32_R_INFO (0, R_NIOS2_RELATIVE); 5104 rela.r_addend = bfd_get_signed_32 (output_bfd, 5105 (sgot->contents + offset)); 5106 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + offset); 5107 } 5108 else 5109 { 5110 bfd_put_32 (output_bfd, (bfd_vma) 0, 5111 sgot->contents + offset); 5112 rela.r_info = ELF32_R_INFO (h->dynindx, R_NIOS2_GLOB_DAT); 5113 rela.r_addend = 0; 5114 } 5115 5116 loc = srela->contents; 5117 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela); 5118 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 5119 } 5120 5121 if (use_plt && h->got.offset != (bfd_vma) -1) 5122 { 5123 bfd_vma offset = (h->got.offset & ~(bfd_vma) 1); 5124 asection *sgot = htab->root.sgot; 5125 asection *splt = htab->root.splt; 5126 bfd_put_32 (output_bfd, (splt->output_section->vma + splt->output_offset 5127 + h->plt.offset), 5128 sgot->contents + offset); 5129 } 5130 5131 if (h->needs_copy) 5132 { 5133 asection *s; 5134 Elf_Internal_Rela rela; 5135 bfd_byte *loc; 5136 5137 /* This symbol needs a copy reloc. Set it up. */ 5138 BFD_ASSERT (h->dynindx != -1 5139 && (h->root.type == bfd_link_hash_defined 5140 || h->root.type == bfd_link_hash_defweak)); 5141 5142 rela.r_offset = (h->root.u.def.value 5143 + h->root.u.def.section->output_section->vma 5144 + h->root.u.def.section->output_offset); 5145 rela.r_info = ELF32_R_INFO (h->dynindx, R_NIOS2_COPY); 5146 rela.r_addend = 0; 5147 if (h->root.u.def.section == htab->root.sdynrelro) 5148 s = htab->root.sreldynrelro; 5149 else 5150 s = htab->root.srelbss; 5151 BFD_ASSERT (s != NULL); 5152 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); 5153 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 5154 } 5155 5156 /* Mark _DYNAMIC, _GLOBAL_OFFSET_TABLE_, and _gp_got as absolute. */ 5157 if (strcmp (h->root.root.string, "_DYNAMIC") == 0 5158 || h == htab->root.hgot 5159 || h == htab->h_gp_got) 5160 sym->st_shndx = SHN_ABS; 5161 5162 return TRUE; 5163 } 5164 5165 /* Implement elf_backend_finish_dynamic_sections. */ 5166 static bfd_boolean 5167 nios2_elf32_finish_dynamic_sections (bfd *output_bfd, 5168 struct bfd_link_info *info) 5169 { 5170 asection *sgotplt; 5171 asection *sdyn; 5172 struct elf32_nios2_link_hash_table *htab; 5173 5174 htab = elf32_nios2_hash_table (info); 5175 sgotplt = htab->root.sgotplt; 5176 sdyn = NULL; 5177 5178 if (htab->root.dynamic_sections_created) 5179 { 5180 asection *splt; 5181 Elf32_External_Dyn *dyncon, *dynconend; 5182 5183 splt = htab->root.splt; 5184 sdyn = bfd_get_linker_section (htab->root.dynobj, ".dynamic"); 5185 BFD_ASSERT (splt != NULL && sdyn != NULL && sgotplt != NULL); 5186 5187 dyncon = (Elf32_External_Dyn *) sdyn->contents; 5188 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); 5189 for (; dyncon < dynconend; dyncon++) 5190 { 5191 Elf_Internal_Dyn dyn; 5192 asection *s; 5193 5194 bfd_elf32_swap_dyn_in (htab->root.dynobj, dyncon, &dyn); 5195 5196 switch (dyn.d_tag) 5197 { 5198 default: 5199 break; 5200 5201 case DT_PLTGOT: 5202 s = htab->root.sgotplt; 5203 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 5204 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 5205 break; 5206 5207 case DT_JMPREL: 5208 s = htab->root.srelplt; 5209 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 5210 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 5211 break; 5212 5213 case DT_PLTRELSZ: 5214 s = htab->root.srelplt; 5215 dyn.d_un.d_val = s->size; 5216 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 5217 break; 5218 5219 case DT_NIOS2_GP: 5220 s = htab->root.sgotplt; 5221 dyn.d_un.d_ptr 5222 = s->output_section->vma + s->output_offset + 0x7ff0; 5223 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 5224 break; 5225 } 5226 } 5227 5228 /* Fill in the first entry in the procedure linkage table. */ 5229 if (splt->size > 0) 5230 { 5231 bfd_vma got_address = (sgotplt->output_section->vma 5232 + sgotplt->output_offset); 5233 if (bfd_link_pic (info)) 5234 { 5235 bfd_vma got_pcrel = got_address - (splt->output_section->vma 5236 + splt->output_offset); 5237 /* Both GOT and PLT must be aligned to a 16-byte boundary 5238 for the two loads to share the %hiadj part. The 4-byte 5239 offset for nextpc is accounted for in the %lo offsets 5240 on the loads. */ 5241 BFD_ASSERT ((got_pcrel & 0xf) == 0); 5242 nios2_elf32_install_data (splt, nios2_so_plt0_entry, 0, 6); 5243 nios2_elf32_install_imm16 (splt, 4, hiadj (got_pcrel)); 5244 nios2_elf32_install_imm16 (splt, 12, got_pcrel & 0xffff); 5245 nios2_elf32_install_imm16 (splt, 16, (got_pcrel + 4) & 0xffff); 5246 } 5247 else 5248 { 5249 /* Divide by 4 here, not 3 because we already corrected for the 5250 res_N branches. */ 5251 bfd_vma res_size = (splt->size - 28) / 4; 5252 bfd_vma res_start = (splt->output_section->vma 5253 + splt->output_offset); 5254 bfd_vma res_offset; 5255 5256 for (res_offset = 0; res_offset < res_size; res_offset += 4) 5257 bfd_put_32 (output_bfd, 5258 6 | ((res_size - (res_offset + 4)) << 6), 5259 splt->contents + res_offset); 5260 5261 /* The GOT must be aligned to a 16-byte boundary for the 5262 two loads to share the same %hiadj part. */ 5263 BFD_ASSERT ((got_address & 0xf) == 0); 5264 5265 nios2_elf32_install_data (splt, nios2_plt0_entry, res_size, 7); 5266 nios2_elf32_install_imm16 (splt, res_size, hiadj (res_start)); 5267 nios2_elf32_install_imm16 (splt, res_size + 4, 5268 res_start & 0xffff); 5269 nios2_elf32_install_imm16 (splt, res_size + 12, 5270 hiadj (got_address)); 5271 nios2_elf32_install_imm16 (splt, res_size + 16, 5272 (got_address + 4) & 0xffff); 5273 nios2_elf32_install_imm16 (splt, res_size + 20, 5274 (got_address + 8) & 0xffff); 5275 } 5276 } 5277 } 5278 5279 /* Fill in the first three entries in the global offset table. */ 5280 if (sgotplt != NULL && sgotplt->size > 0) 5281 { 5282 if (sdyn == NULL) 5283 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents); 5284 else 5285 bfd_put_32 (output_bfd, 5286 sdyn->output_section->vma + sdyn->output_offset, 5287 sgotplt->contents); 5288 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 4); 5289 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 8); 5290 5291 if (sgotplt->output_section != bfd_abs_section_ptr) 5292 elf_section_data (sgotplt->output_section)->this_hdr.sh_entsize = 4; 5293 } 5294 5295 return TRUE; 5296 } 5297 5298 /* Implement elf_backend_adjust_dynamic_symbol: 5299 Adjust a symbol defined by a dynamic object and referenced by a 5300 regular object. The current definition is in some section of the 5301 dynamic object, but we're not including those sections. We have to 5302 change the definition to something the rest of the link can 5303 understand. */ 5304 static bfd_boolean 5305 nios2_elf32_adjust_dynamic_symbol (struct bfd_link_info *info, 5306 struct elf_link_hash_entry *h) 5307 { 5308 struct elf32_nios2_link_hash_table *htab; 5309 bfd *dynobj; 5310 asection *s, *srel; 5311 unsigned align2; 5312 5313 htab = elf32_nios2_hash_table (info); 5314 dynobj = htab->root.dynobj; 5315 5316 /* Make sure we know what is going on here. */ 5317 BFD_ASSERT (dynobj != NULL 5318 && (h->needs_plt 5319 || h->is_weakalias 5320 || (h->def_dynamic 5321 && h->ref_regular 5322 && !h->def_regular))); 5323 5324 /* If this is a function, put it in the procedure linkage table. We 5325 will fill in the contents of the procedure linkage table later, 5326 when we know the address of the .got section. */ 5327 if (h->type == STT_FUNC || h->needs_plt) 5328 { 5329 if (h->plt.refcount <= 0 5330 || SYMBOL_CALLS_LOCAL (info, h) 5331 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 5332 && h->root.type == bfd_link_hash_undefweak)) 5333 { 5334 /* This case can occur if we saw a PLT reloc in an input 5335 file, but the symbol was never referred to by a dynamic 5336 object, or if all references were garbage collected. In 5337 such a case, we don't actually need to build a procedure 5338 linkage table, and we can just do a PCREL reloc instead. */ 5339 h->plt.offset = (bfd_vma) -1; 5340 h->needs_plt = 0; 5341 } 5342 5343 return TRUE; 5344 } 5345 5346 /* Reinitialize the plt offset now that it is not used as a reference 5347 count any more. */ 5348 h->plt.offset = (bfd_vma) -1; 5349 5350 /* If this is a weak symbol, and there is a real definition, the 5351 processor independent code will have arranged for us to see the 5352 real definition first, and we can just use the same value. */ 5353 if (h->is_weakalias) 5354 { 5355 struct elf_link_hash_entry *def = weakdef (h); 5356 BFD_ASSERT (def->root.type == bfd_link_hash_defined); 5357 h->root.u.def.section = def->root.u.def.section; 5358 h->root.u.def.value = def->root.u.def.value; 5359 return TRUE; 5360 } 5361 5362 /* If there are no non-GOT references, we do not need a copy 5363 relocation. */ 5364 if (!h->non_got_ref) 5365 return TRUE; 5366 5367 /* This is a reference to a symbol defined by a dynamic object which 5368 is not a function. 5369 If we are creating a shared library, we must presume that the 5370 only references to the symbol are via the global offset table. 5371 For such cases we need not do anything here; the relocations will 5372 be handled correctly by relocate_section. */ 5373 if (bfd_link_pic (info)) 5374 return TRUE; 5375 5376 if (h->size == 0) 5377 { 5378 _bfd_error_handler (_("dynamic variable `%s' is zero size"), 5379 h->root.root.string); 5380 return TRUE; 5381 } 5382 5383 /* We must allocate the symbol in our .dynbss section, which will 5384 become part of the .bss section of the executable. There will be 5385 an entry for this symbol in the .dynsym section. The dynamic 5386 object will contain position independent code, so all references 5387 from the dynamic object to this symbol will go through the global 5388 offset table. The dynamic linker will use the .dynsym entry to 5389 determine the address it must put in the global offset table, so 5390 both the dynamic object and the regular object will refer to the 5391 same memory location for the variable. */ 5392 /* We must generate a R_NIOS2_COPY reloc to tell the dynamic linker to 5393 copy the initial value out of the dynamic object and into the 5394 runtime process image. We need to remember the offset into the 5395 .rela.bss section we are going to use. */ 5396 if ((h->root.u.def.section->flags & SEC_READONLY) != 0) 5397 { 5398 s = htab->root.sdynrelro; 5399 srel = htab->root.sreldynrelro; 5400 } 5401 else 5402 { 5403 s = htab->root.sdynbss; 5404 srel = htab->root.srelbss; 5405 } 5406 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) 5407 { 5408 srel->size += sizeof (Elf32_External_Rela); 5409 h->needs_copy = 1; 5410 } 5411 5412 align2 = bfd_log2 (h->size); 5413 if (align2 > h->root.u.def.section->alignment_power) 5414 align2 = h->root.u.def.section->alignment_power; 5415 5416 /* Align dynbss. */ 5417 s->size = BFD_ALIGN (s->size, (bfd_size_type)1 << align2); 5418 if (align2 > bfd_get_section_alignment (dynobj, s) 5419 && !bfd_set_section_alignment (dynobj, s, align2)) 5420 return FALSE; 5421 5422 /* Define the symbol as being at this point in the section. */ 5423 h->root.u.def.section = s; 5424 h->root.u.def.value = s->size; 5425 5426 /* Increment the section size to make room for the symbol. */ 5427 s->size += h->size; 5428 5429 return TRUE; 5430 } 5431 5432 /* Worker function for nios2_elf32_size_dynamic_sections. */ 5433 static bfd_boolean 5434 adjust_dynrelocs (struct elf_link_hash_entry *h, PTR inf) 5435 { 5436 struct bfd_link_info *info; 5437 struct elf32_nios2_link_hash_table *htab; 5438 5439 if (h->root.type == bfd_link_hash_indirect) 5440 return TRUE; 5441 5442 if (h->root.type == bfd_link_hash_warning) 5443 /* When warning symbols are created, they **replace** the "real" 5444 entry in the hash table, thus we never get to see the real 5445 symbol in a hash traversal. So look at it now. */ 5446 h = (struct elf_link_hash_entry *) h->root.u.i.link; 5447 5448 info = (struct bfd_link_info *) inf; 5449 htab = elf32_nios2_hash_table (info); 5450 5451 if (h->plt.offset != (bfd_vma)-1) 5452 h->plt.offset += htab->res_n_size; 5453 if (htab->root.splt == h->root.u.def.section) 5454 h->root.u.def.value += htab->res_n_size; 5455 5456 return TRUE; 5457 } 5458 5459 /* Another worker function for nios2_elf32_size_dynamic_sections. 5460 Allocate space in .plt, .got and associated reloc sections for 5461 dynamic relocs. */ 5462 static bfd_boolean 5463 allocate_dynrelocs (struct elf_link_hash_entry *h, PTR inf) 5464 { 5465 struct bfd_link_info *info; 5466 struct elf32_nios2_link_hash_table *htab; 5467 struct elf32_nios2_link_hash_entry *eh; 5468 struct elf_dyn_relocs *p; 5469 int use_plt; 5470 5471 if (h->root.type == bfd_link_hash_indirect) 5472 return TRUE; 5473 5474 if (h->root.type == bfd_link_hash_warning) 5475 /* When warning symbols are created, they **replace** the "real" 5476 entry in the hash table, thus we never get to see the real 5477 symbol in a hash traversal. So look at it now. */ 5478 h = (struct elf_link_hash_entry *) h->root.u.i.link; 5479 5480 info = (struct bfd_link_info *) inf; 5481 htab = elf32_nios2_hash_table (info); 5482 5483 if (htab->root.dynamic_sections_created 5484 && h->plt.refcount > 0) 5485 { 5486 /* Make sure this symbol is output as a dynamic symbol. 5487 Undefined weak syms won't yet be marked as dynamic. */ 5488 if (h->dynindx == -1 5489 && !h->forced_local 5490 && !bfd_elf_link_record_dynamic_symbol (info, h)) 5491 return FALSE; 5492 5493 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), h)) 5494 { 5495 asection *s = htab->root.splt; 5496 5497 /* Allocate room for the header. */ 5498 if (s->size == 0) 5499 { 5500 if (bfd_link_pic (info)) 5501 s->size = 24; 5502 else 5503 s->size = 28; 5504 } 5505 5506 h->plt.offset = s->size; 5507 5508 /* If this symbol is not defined in a regular file, and we are 5509 not generating a shared library, then set the symbol to this 5510 location in the .plt. This is required to make function 5511 pointers compare as equal between the normal executable and 5512 the shared library. */ 5513 if (! bfd_link_pic (info) 5514 && !h->def_regular) 5515 { 5516 h->root.u.def.section = s; 5517 h->root.u.def.value = h->plt.offset; 5518 } 5519 5520 /* Make room for this entry. */ 5521 s->size += 12; 5522 5523 /* We also need to make an entry in the .rela.plt section. */ 5524 htab->root.srelplt->size += sizeof (Elf32_External_Rela); 5525 5526 /* And the .got.plt section. */ 5527 htab->root.sgotplt->size += 4; 5528 } 5529 else 5530 { 5531 h->plt.offset = (bfd_vma) -1; 5532 h->needs_plt = 0; 5533 } 5534 } 5535 else 5536 { 5537 h->plt.offset = (bfd_vma) -1; 5538 h->needs_plt = 0; 5539 } 5540 5541 eh = (struct elf32_nios2_link_hash_entry *) h; 5542 use_plt = (eh->got_types_used == CALL_USED 5543 && h->plt.offset != (bfd_vma) -1); 5544 5545 if (h->got.refcount > 0) 5546 { 5547 asection *s; 5548 bfd_boolean dyn; 5549 int tls_type = eh->tls_type; 5550 int indx; 5551 5552 /* Make sure this symbol is output as a dynamic symbol. 5553 Undefined weak syms won't yet be marked as dynamic. */ 5554 if (h->dynindx == -1 5555 && !h->forced_local 5556 && !bfd_elf_link_record_dynamic_symbol (info, h)) 5557 return FALSE; 5558 5559 s = htab->root.sgot; 5560 h->got.offset = s->size; 5561 5562 if (tls_type == GOT_UNKNOWN) 5563 abort (); 5564 5565 if (tls_type == GOT_NORMAL) 5566 /* Non-TLS symbols need one GOT slot. */ 5567 s->size += 4; 5568 else 5569 { 5570 if (tls_type & GOT_TLS_GD) 5571 /* R_NIOS2_TLS_GD16 needs 2 consecutive GOT slots. */ 5572 s->size += 8; 5573 if (tls_type & GOT_TLS_IE) 5574 /* R_NIOS2_TLS_IE16 needs one GOT slot. */ 5575 s->size += 4; 5576 } 5577 5578 dyn = htab->root.dynamic_sections_created; 5579 5580 indx = 0; 5581 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h) 5582 && (!bfd_link_pic (info) 5583 || !SYMBOL_REFERENCES_LOCAL (info, h))) 5584 indx = h->dynindx; 5585 5586 if (tls_type != GOT_NORMAL 5587 && (bfd_link_pic (info) || indx != 0) 5588 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 5589 || h->root.type != bfd_link_hash_undefweak)) 5590 { 5591 if (tls_type & GOT_TLS_IE) 5592 htab->root.srelgot->size += sizeof (Elf32_External_Rela); 5593 5594 if (tls_type & GOT_TLS_GD) 5595 htab->root.srelgot->size += sizeof (Elf32_External_Rela); 5596 5597 if ((tls_type & GOT_TLS_GD) && indx != 0) 5598 htab->root.srelgot->size += sizeof (Elf32_External_Rela); 5599 } 5600 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 5601 || h->root.type != bfd_link_hash_undefweak) 5602 && !use_plt 5603 && (bfd_link_pic (info) 5604 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) 5605 htab->root.srelgot->size += sizeof (Elf32_External_Rela); 5606 } 5607 else 5608 h->got.offset = (bfd_vma) -1; 5609 5610 if (eh->dyn_relocs == NULL) 5611 return TRUE; 5612 5613 /* In the shared -Bsymbolic case, discard space allocated for 5614 dynamic pc-relative relocs against symbols which turn out to be 5615 defined in regular objects. For the normal shared case, discard 5616 space for pc-relative relocs that have become local due to symbol 5617 visibility changes. */ 5618 5619 if (bfd_link_pic (info)) 5620 { 5621 if (h->def_regular 5622 && (h->forced_local || SYMBOLIC_BIND (info, h))) 5623 { 5624 struct elf_dyn_relocs **pp; 5625 5626 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) 5627 { 5628 p->count -= p->pc_count; 5629 p->pc_count = 0; 5630 if (p->count == 0) 5631 *pp = p->next; 5632 else 5633 pp = &p->next; 5634 } 5635 } 5636 5637 /* Also discard relocs on undefined weak syms with non-default 5638 visibility. */ 5639 if (eh->dyn_relocs != NULL 5640 && h->root.type == bfd_link_hash_undefweak) 5641 { 5642 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 5643 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) 5644 eh->dyn_relocs = NULL; 5645 5646 /* Make sure undefined weak symbols are output as a dynamic 5647 symbol in PIEs. */ 5648 else if (h->dynindx == -1 5649 && !h->forced_local 5650 && !bfd_elf_link_record_dynamic_symbol (info, h)) 5651 return FALSE; 5652 } 5653 } 5654 else 5655 { 5656 /* For the non-shared case, discard space for relocs against 5657 symbols which turn out to need copy relocs or are not 5658 dynamic. */ 5659 5660 if (!h->non_got_ref 5661 && ((h->def_dynamic && !h->def_regular) 5662 || (htab->root.dynamic_sections_created 5663 && (h->root.type == bfd_link_hash_undefweak 5664 || h->root.type == bfd_link_hash_undefined)))) 5665 { 5666 /* Make sure this symbol is output as a dynamic symbol. 5667 Undefined weak syms won't yet be marked as dynamic. */ 5668 if (h->dynindx == -1 5669 && !h->forced_local 5670 && !bfd_elf_link_record_dynamic_symbol (info, h)) 5671 return FALSE; 5672 5673 /* If that succeeded, we know we'll be keeping all the 5674 relocs. */ 5675 if (h->dynindx != -1) 5676 goto keep; 5677 } 5678 5679 eh->dyn_relocs = NULL; 5680 5681 keep: ; 5682 } 5683 5684 /* Finally, allocate space. */ 5685 for (p = eh->dyn_relocs; p != NULL; p = p->next) 5686 { 5687 asection *sreloc = elf_section_data (p->sec)->sreloc; 5688 sreloc->size += p->count * sizeof (Elf32_External_Rela); 5689 } 5690 5691 return TRUE; 5692 } 5693 5694 /* Implement elf_backend_size_dynamic_sections: 5695 Set the sizes of the dynamic sections. */ 5696 static bfd_boolean 5697 nios2_elf32_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, 5698 struct bfd_link_info *info) 5699 { 5700 bfd *dynobj; 5701 asection *s; 5702 bfd_boolean relocs; 5703 bfd *ibfd; 5704 struct elf32_nios2_link_hash_table *htab; 5705 5706 htab = elf32_nios2_hash_table (info); 5707 dynobj = htab->root.dynobj; 5708 BFD_ASSERT (dynobj != NULL); 5709 5710 htab->res_n_size = 0; 5711 if (htab->root.dynamic_sections_created) 5712 { 5713 /* Set the contents of the .interp section to the interpreter. */ 5714 if (bfd_link_executable (info) && !info->nointerp) 5715 { 5716 s = bfd_get_linker_section (dynobj, ".interp"); 5717 BFD_ASSERT (s != NULL); 5718 s->size = sizeof ELF_DYNAMIC_INTERPRETER; 5719 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; 5720 } 5721 } 5722 else 5723 { 5724 /* We may have created entries in the .rela.got section. 5725 However, if we are not creating the dynamic sections, we will 5726 not actually use these entries. Reset the size of .rela.got, 5727 which will cause it to get stripped from the output file 5728 below. */ 5729 s = htab->root.srelgot; 5730 if (s != NULL) 5731 s->size = 0; 5732 } 5733 5734 /* Set up .got offsets for local syms, and space for local dynamic 5735 relocs. */ 5736 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 5737 { 5738 bfd_signed_vma *local_got; 5739 bfd_signed_vma *end_local_got; 5740 char *local_tls_type; 5741 bfd_size_type locsymcount; 5742 Elf_Internal_Shdr *symtab_hdr; 5743 asection *srel; 5744 5745 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) 5746 continue; 5747 5748 for (s = ibfd->sections; s != NULL; s = s->next) 5749 { 5750 struct elf_dyn_relocs *p; 5751 5752 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next) 5753 { 5754 if (!bfd_is_abs_section (p->sec) 5755 && bfd_is_abs_section (p->sec->output_section)) 5756 { 5757 /* Input section has been discarded, either because 5758 it is a copy of a linkonce section or due to 5759 linker script /DISCARD/, so we'll be discarding 5760 the relocs too. */ 5761 } 5762 else if (p->count != 0) 5763 { 5764 srel = elf_section_data (p->sec)->sreloc; 5765 srel->size += p->count * sizeof (Elf32_External_Rela); 5766 if ((p->sec->output_section->flags & SEC_READONLY) != 0) 5767 info->flags |= DF_TEXTREL; 5768 } 5769 } 5770 } 5771 5772 local_got = elf_local_got_refcounts (ibfd); 5773 if (!local_got) 5774 continue; 5775 5776 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; 5777 locsymcount = symtab_hdr->sh_info; 5778 end_local_got = local_got + locsymcount; 5779 local_tls_type = elf32_nios2_local_got_tls_type (ibfd); 5780 s = htab->root.sgot; 5781 srel = htab->root.srelgot; 5782 for (; local_got < end_local_got; ++local_got, ++local_tls_type) 5783 { 5784 if (*local_got > 0) 5785 { 5786 *local_got = s->size; 5787 if (*local_tls_type & GOT_TLS_GD) 5788 /* TLS_GD relocs need an 8-byte structure in the GOT. */ 5789 s->size += 8; 5790 if (*local_tls_type & GOT_TLS_IE) 5791 s->size += 4; 5792 if (*local_tls_type == GOT_NORMAL) 5793 s->size += 4; 5794 5795 if (bfd_link_pic (info) || *local_tls_type == GOT_TLS_GD) 5796 srel->size += sizeof (Elf32_External_Rela); 5797 } 5798 else 5799 *local_got = (bfd_vma) -1; 5800 } 5801 } 5802 5803 if (htab->tls_ldm_got.refcount > 0) 5804 { 5805 /* Allocate two GOT entries and one dynamic relocation (if necessary) 5806 for R_NIOS2_TLS_LDM16 relocations. */ 5807 htab->tls_ldm_got.offset = htab->root.sgot->size; 5808 htab->root.sgot->size += 8; 5809 if (bfd_link_pic (info)) 5810 htab->root.srelgot->size += sizeof (Elf32_External_Rela); 5811 } 5812 else 5813 htab->tls_ldm_got.offset = -1; 5814 5815 /* Allocate global sym .plt and .got entries, and space for global 5816 sym dynamic relocs. */ 5817 elf_link_hash_traverse (& htab->root, allocate_dynrelocs, info); 5818 5819 if (htab->root.dynamic_sections_created) 5820 { 5821 /* If the .got section is more than 0x8000 bytes, we add 5822 0x8000 to the value of _gp_got, so that 16-bit relocations 5823 have a greater chance of working. */ 5824 if (htab->root.sgot->size >= 0x8000 5825 && htab->h_gp_got->root.u.def.value == 0) 5826 htab->h_gp_got->root.u.def.value = 0x8000; 5827 } 5828 5829 /* The check_relocs and adjust_dynamic_symbol entry points have 5830 determined the sizes of the various dynamic sections. Allocate 5831 memory for them. */ 5832 relocs = FALSE; 5833 for (s = dynobj->sections; s != NULL; s = s->next) 5834 { 5835 const char *name; 5836 5837 if ((s->flags & SEC_LINKER_CREATED) == 0) 5838 continue; 5839 5840 /* It's OK to base decisions on the section name, because none 5841 of the dynobj section names depend upon the input files. */ 5842 name = bfd_get_section_name (dynobj, s); 5843 5844 if (CONST_STRNEQ (name, ".rela")) 5845 { 5846 if (s->size != 0) 5847 { 5848 if (s != htab->root.srelplt) 5849 relocs = TRUE; 5850 5851 /* We use the reloc_count field as a counter if we need 5852 to copy relocs into the output file. */ 5853 s->reloc_count = 0; 5854 } 5855 } 5856 else if (s == htab->root.splt) 5857 { 5858 /* Correct for the number of res_N branches. */ 5859 if (s->size != 0 && !bfd_link_pic (info)) 5860 { 5861 htab->res_n_size = (s->size - 28) / 3; 5862 s->size += htab->res_n_size; 5863 } 5864 } 5865 else if (s != htab->sbss 5866 && s != htab->root.sgot 5867 && s != htab->root.sgotplt 5868 && s != htab->root.sdynbss 5869 && s != htab->root.sdynrelro) 5870 /* It's not one of our sections, so don't allocate space. */ 5871 continue; 5872 5873 if (s->size == 0) 5874 { 5875 s->flags |= SEC_EXCLUDE; 5876 continue; 5877 } 5878 5879 if ((s->flags & SEC_HAS_CONTENTS) == 0) 5880 continue; 5881 5882 /* Allocate memory for the section contents. */ 5883 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); 5884 if (s->contents == NULL) 5885 return FALSE; 5886 } 5887 5888 /* Adjust dynamic symbols that point to the plt to account for the 5889 now-known number of resN slots. */ 5890 if (htab->res_n_size) 5891 elf_link_hash_traverse (& htab->root, adjust_dynrelocs, info); 5892 5893 if (htab->root.dynamic_sections_created) 5894 { 5895 /* Add some entries to the .dynamic section. We fill in the 5896 values later, in elf_nios2_finish_dynamic_sections, but we 5897 must add the entries now so that we get the correct size for 5898 the .dynamic section. The DT_DEBUG entry is filled in by the 5899 dynamic linker and used by the debugger. */ 5900 #define add_dynamic_entry(TAG, VAL) \ 5901 _bfd_elf_add_dynamic_entry (info, TAG, VAL) 5902 5903 if (!bfd_link_pic (info) && !add_dynamic_entry (DT_DEBUG, 0)) 5904 return FALSE; 5905 5906 if (htab->root.sgotplt->size != 0 5907 && !add_dynamic_entry (DT_PLTGOT, 0)) 5908 return FALSE; 5909 5910 if (htab->root.splt->size != 0 5911 && (!add_dynamic_entry (DT_PLTRELSZ, 0) 5912 || !add_dynamic_entry (DT_PLTREL, DT_RELA) 5913 || !add_dynamic_entry (DT_JMPREL, 0))) 5914 return FALSE; 5915 5916 if (relocs 5917 && (!add_dynamic_entry (DT_RELA, 0) 5918 || !add_dynamic_entry (DT_RELASZ, 0) 5919 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))) 5920 return FALSE; 5921 5922 if (!bfd_link_pic (info) && !add_dynamic_entry (DT_NIOS2_GP, 0)) 5923 return FALSE; 5924 5925 if ((info->flags & DF_TEXTREL) != 0 5926 && !add_dynamic_entry (DT_TEXTREL, 0)) 5927 return FALSE; 5928 } 5929 #undef add_dynamic_entry 5930 5931 return TRUE; 5932 } 5933 5934 /* Free the derived linker hash table. */ 5935 static void 5936 nios2_elf32_link_hash_table_free (bfd *obfd) 5937 { 5938 struct elf32_nios2_link_hash_table *htab 5939 = (struct elf32_nios2_link_hash_table *) obfd->link.hash; 5940 5941 bfd_hash_table_free (&htab->bstab); 5942 _bfd_elf_link_hash_table_free (obfd); 5943 } 5944 5945 /* Implement bfd_elf32_bfd_link_hash_table_create. */ 5946 static struct bfd_link_hash_table * 5947 nios2_elf32_link_hash_table_create (bfd *abfd) 5948 { 5949 struct elf32_nios2_link_hash_table *ret; 5950 bfd_size_type amt = sizeof (struct elf32_nios2_link_hash_table); 5951 5952 ret = bfd_zmalloc (amt); 5953 if (ret == NULL) 5954 return NULL; 5955 5956 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, 5957 link_hash_newfunc, 5958 sizeof (struct 5959 elf32_nios2_link_hash_entry), 5960 NIOS2_ELF_DATA)) 5961 { 5962 free (ret); 5963 return NULL; 5964 } 5965 5966 /* Init the stub hash table too. */ 5967 if (!bfd_hash_table_init (&ret->bstab, stub_hash_newfunc, 5968 sizeof (struct elf32_nios2_stub_hash_entry))) 5969 { 5970 _bfd_elf_link_hash_table_free (abfd); 5971 return NULL; 5972 } 5973 ret->root.root.hash_table_free = nios2_elf32_link_hash_table_free; 5974 5975 return &ret->root.root; 5976 } 5977 5978 /* Implement elf_backend_reloc_type_class. */ 5979 static enum elf_reloc_type_class 5980 nios2_elf32_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, 5981 const asection *rel_sec ATTRIBUTE_UNUSED, 5982 const Elf_Internal_Rela *rela) 5983 { 5984 switch ((int) ELF32_R_TYPE (rela->r_info)) 5985 { 5986 case R_NIOS2_RELATIVE: 5987 return reloc_class_relative; 5988 case R_NIOS2_JUMP_SLOT: 5989 return reloc_class_plt; 5990 case R_NIOS2_COPY: 5991 return reloc_class_copy; 5992 default: 5993 return reloc_class_normal; 5994 } 5995 } 5996 5997 /* Return 1 if target is one of ours. */ 5998 static bfd_boolean 5999 is_nios2_elf_target (const struct bfd_target *targ) 6000 { 6001 return (targ == &nios2_elf32_le_vec 6002 || targ == &nios2_elf32_be_vec); 6003 } 6004 6005 /* Implement elf_backend_add_symbol_hook. 6006 This hook is called by the linker when adding symbols from an object 6007 file. We use it to put .comm items in .sbss, and not .bss. */ 6008 static bfd_boolean 6009 nios2_elf_add_symbol_hook (bfd *abfd, 6010 struct bfd_link_info *info, 6011 Elf_Internal_Sym *sym, 6012 const char **namep ATTRIBUTE_UNUSED, 6013 flagword *flagsp ATTRIBUTE_UNUSED, 6014 asection **secp, 6015 bfd_vma *valp) 6016 { 6017 if (sym->st_shndx == SHN_COMMON 6018 && !bfd_link_relocatable (info) 6019 && sym->st_size <= elf_gp_size (abfd) 6020 && is_nios2_elf_target (info->output_bfd->xvec)) 6021 { 6022 /* Common symbols less than or equal to -G nn bytes are automatically 6023 put into .sbss. */ 6024 struct elf32_nios2_link_hash_table *htab; 6025 6026 htab = elf32_nios2_hash_table (info); 6027 if (htab->sbss == NULL) 6028 { 6029 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED; 6030 6031 if (htab->root.dynobj == NULL) 6032 htab->root.dynobj = abfd; 6033 6034 htab->sbss = bfd_make_section_anyway_with_flags (htab->root.dynobj, 6035 ".sbss", flags); 6036 if (htab->sbss == NULL) 6037 return FALSE; 6038 } 6039 6040 *secp = htab->sbss; 6041 *valp = sym->st_size; 6042 } 6043 6044 return TRUE; 6045 } 6046 6047 /* Implement elf_backend_can_make_relative_eh_frame: 6048 Decide whether to attempt to turn absptr or lsda encodings in 6049 shared libraries into pcrel within the given input section. */ 6050 static bfd_boolean 6051 nios2_elf32_can_make_relative_eh_frame (bfd *input_bfd ATTRIBUTE_UNUSED, 6052 struct bfd_link_info *info 6053 ATTRIBUTE_UNUSED, 6054 asection *eh_frame_section 6055 ATTRIBUTE_UNUSED) 6056 { 6057 /* We can't use PC-relative encodings in the .eh_frame section. */ 6058 return FALSE; 6059 } 6060 6061 /* Implement elf_backend_special_sections. */ 6062 const struct bfd_elf_special_section elf32_nios2_special_sections[] = 6063 { 6064 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, 6065 SHF_ALLOC + SHF_WRITE + SHF_NIOS2_GPREL }, 6066 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, 6067 SHF_ALLOC + SHF_WRITE + SHF_NIOS2_GPREL }, 6068 { NULL, 0, 0, 0, 0 } 6069 }; 6070 6071 #define ELF_ARCH bfd_arch_nios2 6072 #define ELF_TARGET_ID NIOS2_ELF_DATA 6073 #define ELF_MACHINE_CODE EM_ALTERA_NIOS2 6074 6075 /* The Nios II MMU uses a 4K page size. */ 6076 6077 #define ELF_MAXPAGESIZE 0x1000 6078 6079 #define bfd_elf32_bfd_link_hash_table_create \ 6080 nios2_elf32_link_hash_table_create 6081 6082 #define bfd_elf32_bfd_merge_private_bfd_data \ 6083 nios2_elf32_merge_private_bfd_data 6084 6085 /* Relocation table lookup macros. */ 6086 6087 #define bfd_elf32_bfd_reloc_type_lookup nios2_elf32_bfd_reloc_type_lookup 6088 #define bfd_elf32_bfd_reloc_name_lookup nios2_elf32_bfd_reloc_name_lookup 6089 6090 /* JUMP_TABLE_LINK macros. */ 6091 6092 /* elf_info_to_howto (using RELA relocations). */ 6093 6094 #define elf_info_to_howto nios2_elf32_info_to_howto 6095 6096 /* elf backend functions. */ 6097 6098 #define elf_backend_can_gc_sections 1 6099 #define elf_backend_can_refcount 1 6100 #define elf_backend_plt_readonly 1 6101 #define elf_backend_want_got_plt 1 6102 #define elf_backend_want_dynrelro 1 6103 #define elf_backend_rela_normal 1 6104 #define elf_backend_dtrel_excludes_plt 1 6105 6106 #define elf_backend_relocate_section nios2_elf32_relocate_section 6107 #define elf_backend_section_flags nios2_elf32_section_flags 6108 #define elf_backend_fake_sections nios2_elf32_fake_sections 6109 #define elf_backend_check_relocs nios2_elf32_check_relocs 6110 6111 #define elf_backend_gc_mark_hook nios2_elf32_gc_mark_hook 6112 #define elf_backend_create_dynamic_sections \ 6113 nios2_elf32_create_dynamic_sections 6114 #define elf_backend_finish_dynamic_symbol nios2_elf32_finish_dynamic_symbol 6115 #define elf_backend_finish_dynamic_sections \ 6116 nios2_elf32_finish_dynamic_sections 6117 #define elf_backend_adjust_dynamic_symbol nios2_elf32_adjust_dynamic_symbol 6118 #define elf_backend_reloc_type_class nios2_elf32_reloc_type_class 6119 #define elf_backend_size_dynamic_sections nios2_elf32_size_dynamic_sections 6120 #define elf_backend_add_symbol_hook nios2_elf_add_symbol_hook 6121 #define elf_backend_copy_indirect_symbol nios2_elf32_copy_indirect_symbol 6122 #define elf_backend_object_p nios2_elf32_object_p 6123 6124 #define elf_backend_grok_prstatus nios2_grok_prstatus 6125 #define elf_backend_grok_psinfo nios2_grok_psinfo 6126 6127 #undef elf_backend_can_make_relative_eh_frame 6128 #define elf_backend_can_make_relative_eh_frame \ 6129 nios2_elf32_can_make_relative_eh_frame 6130 6131 #define elf_backend_special_sections elf32_nios2_special_sections 6132 6133 #define TARGET_LITTLE_SYM nios2_elf32_le_vec 6134 #define TARGET_LITTLE_NAME "elf32-littlenios2" 6135 #define TARGET_BIG_SYM nios2_elf32_be_vec 6136 #define TARGET_BIG_NAME "elf32-bignios2" 6137 6138 #define elf_backend_got_header_size 12 6139 #define elf_backend_default_execstack 0 6140 6141 #include "elf32-target.h" 6142