1 /* Lattice Mico32-specific support for 32-bit ELF 2 Copyright (C) 2008-2015 Free Software Foundation, Inc. 3 Contributed by Jon Beniston <jon@beniston.com> 4 5 This file is part of BFD, the Binary File Descriptor library. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program; if not, write to the Free Software 19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 20 MA 02110-1301, USA. */ 21 22 #include "sysdep.h" 23 #include "bfd.h" 24 #include "libbfd.h" 25 #include "elf-bfd.h" 26 #include "elf/lm32.h" 27 28 #define DEFAULT_STACK_SIZE 0x20000 29 30 #define PLT_ENTRY_SIZE 20 31 32 #define PLT0_ENTRY_WORD0 0 33 #define PLT0_ENTRY_WORD1 0 34 #define PLT0_ENTRY_WORD2 0 35 #define PLT0_ENTRY_WORD3 0 36 #define PLT0_ENTRY_WORD4 0 37 38 #define PLT0_PIC_ENTRY_WORD0 0 39 #define PLT0_PIC_ENTRY_WORD1 0 40 #define PLT0_PIC_ENTRY_WORD2 0 41 #define PLT0_PIC_ENTRY_WORD3 0 42 #define PLT0_PIC_ENTRY_WORD4 0 43 44 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1" 45 46 extern const bfd_target lm32_elf32_fdpic_vec; 47 48 #define IS_FDPIC(bfd) ((bfd)->xvec == &lm32_elf32_fdpic_vec) 49 50 static bfd_reloc_status_type lm32_elf_gprel_reloc 51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 52 53 /* The linker needs to keep track of the number of relocs that it 54 decides to copy as dynamic relocs in check_relocs for each symbol. 55 This is so that it can later discard them if they are found to be 56 unnecessary. We store the information in a field extending the 57 regular ELF linker hash table. */ 58 59 struct elf_lm32_dyn_relocs 60 { 61 struct elf_lm32_dyn_relocs *next; 62 63 /* The input section of the reloc. */ 64 asection *sec; 65 66 /* Total number of relocs copied for the input section. */ 67 bfd_size_type count; 68 69 /* Number of pc-relative relocs copied for the input section. */ 70 bfd_size_type pc_count; 71 }; 72 73 /* lm32 ELF linker hash entry. */ 74 75 struct elf_lm32_link_hash_entry 76 { 77 struct elf_link_hash_entry root; 78 79 /* Track dynamic relocs copied for this symbol. */ 80 struct elf_lm32_dyn_relocs *dyn_relocs; 81 }; 82 83 /* lm32 ELF linker hash table. */ 84 85 struct elf_lm32_link_hash_table 86 { 87 struct elf_link_hash_table root; 88 89 /* Short-cuts to get to dynamic linker sections. */ 90 asection *sgot; 91 asection *sgotplt; 92 asection *srelgot; 93 asection *sfixup32; 94 asection *splt; 95 asection *srelplt; 96 asection *sdynbss; 97 asection *srelbss; 98 99 int relocs32; 100 }; 101 102 /* Get the lm32 ELF linker hash table from a link_info structure. */ 103 104 #define lm32_elf_hash_table(p) \ 105 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ 106 == LM32_ELF_DATA ? ((struct elf_lm32_link_hash_table *) ((p)->hash)) : NULL) 107 108 #define lm32fdpic_got_section(info) \ 109 (lm32_elf_hash_table (info)->sgot) 110 #define lm32fdpic_gotrel_section(info) \ 111 (lm32_elf_hash_table (info)->srelgot) 112 #define lm32fdpic_fixup32_section(info) \ 113 (lm32_elf_hash_table (info)->sfixup32) 114 115 struct weak_symbol_list 116 { 117 const char *name; 118 struct weak_symbol_list *next; 119 }; 120 121 /* Create an entry in an lm32 ELF linker hash table. */ 122 123 static struct bfd_hash_entry * 124 lm32_elf_link_hash_newfunc (struct bfd_hash_entry *entry, 125 struct bfd_hash_table *table, 126 const char *string) 127 { 128 struct elf_lm32_link_hash_entry *ret = 129 (struct elf_lm32_link_hash_entry *) entry; 130 131 /* Allocate the structure if it has not already been allocated by a 132 subclass. */ 133 if (ret == NULL) 134 ret = bfd_hash_allocate (table, 135 sizeof (struct elf_lm32_link_hash_entry)); 136 if (ret == NULL) 137 return NULL; 138 139 /* Call the allocation method of the superclass. */ 140 ret = ((struct elf_lm32_link_hash_entry *) 141 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, 142 table, string)); 143 if (ret != NULL) 144 { 145 struct elf_lm32_link_hash_entry *eh; 146 147 eh = (struct elf_lm32_link_hash_entry *) ret; 148 eh->dyn_relocs = NULL; 149 } 150 151 return (struct bfd_hash_entry *) ret; 152 } 153 154 /* Create an lm32 ELF linker hash table. */ 155 156 static struct bfd_link_hash_table * 157 lm32_elf_link_hash_table_create (bfd *abfd) 158 { 159 struct elf_lm32_link_hash_table *ret; 160 bfd_size_type amt = sizeof (struct elf_lm32_link_hash_table); 161 162 ret = bfd_zmalloc (amt); 163 if (ret == NULL) 164 return NULL; 165 166 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, 167 lm32_elf_link_hash_newfunc, 168 sizeof (struct elf_lm32_link_hash_entry), 169 LM32_ELF_DATA)) 170 { 171 free (ret); 172 return NULL; 173 } 174 175 return &ret->root.root; 176 } 177 178 /* Add a fixup to the ROFIXUP section. */ 179 180 static bfd_vma 181 _lm32fdpic_add_rofixup (bfd *output_bfd, asection *rofixup, bfd_vma relocation) 182 { 183 bfd_vma fixup_offset; 184 185 if (rofixup->flags & SEC_EXCLUDE) 186 return -1; 187 188 fixup_offset = rofixup->reloc_count * 4; 189 if (rofixup->contents) 190 { 191 BFD_ASSERT (fixup_offset < rofixup->size); 192 if (fixup_offset < rofixup->size) 193 bfd_put_32 (output_bfd, relocation, rofixup->contents + fixup_offset); 194 } 195 rofixup->reloc_count++; 196 197 return fixup_offset; 198 } 199 200 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up 201 shortcuts to them in our hash table. */ 202 203 static bfd_boolean 204 create_got_section (bfd *dynobj, struct bfd_link_info *info) 205 { 206 struct elf_lm32_link_hash_table *htab; 207 asection *s; 208 209 /* This function may be called more than once. */ 210 s = bfd_get_linker_section (dynobj, ".got"); 211 if (s != NULL) 212 return TRUE; 213 214 htab = lm32_elf_hash_table (info); 215 if (htab == NULL) 216 return FALSE; 217 218 if (! _bfd_elf_create_got_section (dynobj, info)) 219 return FALSE; 220 221 htab->sgot = bfd_get_linker_section (dynobj, ".got"); 222 htab->sgotplt = bfd_get_linker_section (dynobj, ".got.plt"); 223 htab->srelgot = bfd_get_linker_section (dynobj, ".rela.got"); 224 if (! htab->sgot || ! htab->sgotplt || ! htab->srelgot) 225 abort (); 226 227 return TRUE; 228 } 229 230 /* Create .rofixup sections in DYNOBJ, and set up 231 shortcuts to them in our hash table. */ 232 233 static bfd_boolean 234 create_rofixup_section (bfd *dynobj, struct bfd_link_info *info) 235 { 236 struct elf_lm32_link_hash_table *htab; 237 htab = lm32_elf_hash_table (info); 238 239 if (htab == NULL) 240 return FALSE; 241 242 /* Fixup section for R_LM32_32 relocs. */ 243 lm32fdpic_fixup32_section (info) 244 = bfd_make_section_anyway_with_flags (dynobj, 245 ".rofixup", 246 (SEC_ALLOC 247 | SEC_LOAD 248 | SEC_HAS_CONTENTS 249 | SEC_IN_MEMORY 250 | SEC_LINKER_CREATED 251 | SEC_READONLY)); 252 if (lm32fdpic_fixup32_section (info) == NULL 253 || ! bfd_set_section_alignment (dynobj, 254 lm32fdpic_fixup32_section (info), 2)) 255 return FALSE; 256 257 return TRUE; 258 } 259 260 static reloc_howto_type lm32_elf_howto_table [] = 261 { 262 /* This reloc does nothing. */ 263 HOWTO (R_LM32_NONE, /* type */ 264 0, /* rightshift */ 265 3, /* size (0 = byte, 1 = short, 2 = long) */ 266 0, /* bitsize */ 267 FALSE, /* pc_relative */ 268 0, /* bitpos */ 269 complain_overflow_dont, /* complain_on_overflow */ 270 bfd_elf_generic_reloc, /* special_function */ 271 "R_LM32_NONE", /* name */ 272 FALSE, /* partial_inplace */ 273 0, /* src_mask */ 274 0, /* dst_mask */ 275 FALSE), /* pcrel_offset */ 276 277 /* An 8 bit absolute relocation. */ 278 HOWTO (R_LM32_8, /* type */ 279 0, /* rightshift */ 280 0, /* size (0 = byte, 1 = short, 2 = long) */ 281 8, /* bitsize */ 282 FALSE, /* pc_relative */ 283 0, /* bitpos */ 284 complain_overflow_bitfield,/* complain_on_overflow */ 285 bfd_elf_generic_reloc, /* special_function */ 286 "R_LM32_8", /* name */ 287 FALSE, /* partial_inplace */ 288 0, /* src_mask */ 289 0xff, /* dst_mask */ 290 FALSE), /* pcrel_offset */ 291 292 /* A 16 bit absolute relocation. */ 293 HOWTO (R_LM32_16, /* type */ 294 0, /* rightshift */ 295 1, /* size (0 = byte, 1 = short, 2 = long) */ 296 16, /* bitsize */ 297 FALSE, /* pc_relative */ 298 0, /* bitpos */ 299 complain_overflow_bitfield,/* complain_on_overflow */ 300 bfd_elf_generic_reloc, /* special_function */ 301 "R_LM32_16", /* name */ 302 FALSE, /* partial_inplace */ 303 0, /* src_mask */ 304 0xffff, /* dst_mask */ 305 FALSE), /* pcrel_offset */ 306 307 /* A 32 bit absolute relocation. */ 308 HOWTO (R_LM32_32, /* type */ 309 0, /* rightshift */ 310 2, /* size (0 = byte, 1 = short, 2 = long) */ 311 32, /* bitsize */ 312 FALSE, /* pc_relative */ 313 0, /* bitpos */ 314 complain_overflow_bitfield,/* complain_on_overflow */ 315 bfd_elf_generic_reloc, /* special_function */ 316 "R_LM32_32", /* name */ 317 FALSE, /* partial_inplace */ 318 0, /* src_mask */ 319 0xffffffff, /* dst_mask */ 320 FALSE), /* pcrel_offset */ 321 322 HOWTO (R_LM32_HI16, /* type */ 323 16, /* rightshift */ 324 2, /* size (0 = byte, 1 = short, 2 = long) */ 325 16, /* bitsize */ 326 FALSE, /* pc_relative */ 327 0, /* bitpos */ 328 complain_overflow_bitfield,/* complain_on_overflow */ 329 bfd_elf_generic_reloc, /* special_function */ 330 "R_LM32_HI16", /* name */ 331 FALSE, /* partial_inplace */ 332 0, /* src_mask */ 333 0xffff, /* dst_mask */ 334 FALSE), /* pcrel_offset */ 335 336 HOWTO (R_LM32_LO16, /* type */ 337 0, /* rightshift */ 338 2, /* size (0 = byte, 1 = short, 2 = long) */ 339 16, /* bitsize */ 340 FALSE, /* pc_relative */ 341 0, /* bitpos */ 342 complain_overflow_dont, /* complain_on_overflow */ 343 bfd_elf_generic_reloc, /* special_function */ 344 "R_LM32_LO16", /* name */ 345 FALSE, /* partial_inplace */ 346 0, /* src_mask */ 347 0xffff, /* dst_mask */ 348 FALSE), /* pcrel_offset */ 349 350 HOWTO (R_LM32_GPREL16, /* type */ 351 0, /* rightshift */ 352 2, /* size (0 = byte, 1 = short, 2 = long) */ 353 16, /* bitsize */ 354 FALSE, /* pc_relative */ 355 0, /* bitpos */ 356 complain_overflow_dont, /* complain_on_overflow */ 357 lm32_elf_gprel_reloc, /* special_function */ 358 "R_LM32_GPREL16", /* name */ 359 FALSE, /* partial_inplace */ 360 0, /* src_mask */ 361 0xffff, /* dst_mask */ 362 FALSE), /* pcrel_offset */ 363 364 HOWTO (R_LM32_CALL, /* type */ 365 2, /* rightshift */ 366 2, /* size (0 = byte, 1 = short, 2 = long) */ 367 26, /* bitsize */ 368 TRUE, /* pc_relative */ 369 0, /* bitpos */ 370 complain_overflow_signed, /* complain_on_overflow */ 371 bfd_elf_generic_reloc, /* special_function */ 372 "R_LM32_CALL", /* name */ 373 FALSE, /* partial_inplace */ 374 0, /* src_mask */ 375 0x3ffffff, /* dst_mask */ 376 TRUE), /* pcrel_offset */ 377 378 HOWTO (R_LM32_BRANCH, /* type */ 379 2, /* rightshift */ 380 2, /* size (0 = byte, 1 = short, 2 = long) */ 381 16, /* bitsize */ 382 TRUE, /* pc_relative */ 383 0, /* bitpos */ 384 complain_overflow_signed, /* complain_on_overflow */ 385 bfd_elf_generic_reloc, /* special_function */ 386 "R_LM32_BRANCH", /* name */ 387 FALSE, /* partial_inplace */ 388 0, /* src_mask */ 389 0xffff, /* dst_mask */ 390 TRUE), /* pcrel_offset */ 391 392 /* GNU extension to record C++ vtable hierarchy. */ 393 HOWTO (R_LM32_GNU_VTINHERIT, /* type */ 394 0, /* rightshift */ 395 2, /* size (0 = byte, 1 = short, 2 = long) */ 396 0, /* bitsize */ 397 FALSE, /* pc_relative */ 398 0, /* bitpos */ 399 complain_overflow_dont, /* complain_on_overflow */ 400 NULL, /* special_function */ 401 "R_LM32_GNU_VTINHERIT", /* name */ 402 FALSE, /* partial_inplace */ 403 0, /* src_mask */ 404 0, /* dst_mask */ 405 FALSE), /* pcrel_offset */ 406 407 /* GNU extension to record C++ vtable member usage. */ 408 HOWTO (R_LM32_GNU_VTENTRY, /* type */ 409 0, /* rightshift */ 410 2, /* size (0 = byte, 1 = short, 2 = long) */ 411 0, /* bitsize */ 412 FALSE, /* pc_relative */ 413 0, /* bitpos */ 414 complain_overflow_dont, /* complain_on_overflow */ 415 _bfd_elf_rel_vtable_reloc_fn,/* special_function */ 416 "R_LM32_GNU_VTENTRY", /* name */ 417 FALSE, /* partial_inplace */ 418 0, /* src_mask */ 419 0, /* dst_mask */ 420 FALSE), /* pcrel_offset */ 421 422 HOWTO (R_LM32_16_GOT, /* type */ 423 0, /* rightshift */ 424 2, /* size (0 = byte, 1 = short, 2 = long) */ 425 16, /* bitsize */ 426 FALSE, /* pc_relative */ 427 0, /* bitpos */ 428 complain_overflow_signed, /* complain_on_overflow */ 429 bfd_elf_generic_reloc, /* special_function */ 430 "R_LM32_16_GOT", /* name */ 431 FALSE, /* partial_inplace */ 432 0, /* src_mask */ 433 0xffff, /* dst_mask */ 434 FALSE), /* pcrel_offset */ 435 436 HOWTO (R_LM32_GOTOFF_HI16, /* type */ 437 16, /* rightshift */ 438 2, /* size (0 = byte, 1 = short, 2 = long) */ 439 16, /* bitsize */ 440 FALSE, /* pc_relative */ 441 0, /* bitpos */ 442 complain_overflow_dont, /* complain_on_overflow */ 443 bfd_elf_generic_reloc, /* special_function */ 444 "R_LM32_GOTOFF_HI16", /* name */ 445 FALSE, /* partial_inplace */ 446 0xffff, /* src_mask */ 447 0xffff, /* dst_mask */ 448 FALSE), /* pcrel_offset */ 449 450 HOWTO (R_LM32_GOTOFF_LO16, /* type */ 451 0, /* rightshift */ 452 2, /* size (0 = byte, 1 = short, 2 = long) */ 453 16, /* bitsize */ 454 FALSE, /* pc_relative */ 455 0, /* bitpos */ 456 complain_overflow_dont, /* complain_on_overflow */ 457 bfd_elf_generic_reloc, /* special_function */ 458 "R_LM32_GOTOFF_LO16", /* name */ 459 FALSE, /* partial_inplace */ 460 0xffff, /* src_mask */ 461 0xffff, /* dst_mask */ 462 FALSE), /* pcrel_offset */ 463 464 HOWTO (R_LM32_COPY, /* type */ 465 0, /* rightshift */ 466 2, /* size (0 = byte, 1 = short, 2 = long) */ 467 32, /* bitsize */ 468 FALSE, /* pc_relative */ 469 0, /* bitpos */ 470 complain_overflow_bitfield, /* complain_on_overflow */ 471 bfd_elf_generic_reloc, /* special_function */ 472 "R_LM32_COPY", /* name */ 473 FALSE, /* partial_inplace */ 474 0xffffffff, /* src_mask */ 475 0xffffffff, /* dst_mask */ 476 FALSE), /* pcrel_offset */ 477 478 HOWTO (R_LM32_GLOB_DAT, /* type */ 479 0, /* rightshift */ 480 2, /* size (0 = byte, 1 = short, 2 = long) */ 481 32, /* bitsize */ 482 FALSE, /* pc_relative */ 483 0, /* bitpos */ 484 complain_overflow_bitfield, /* complain_on_overflow */ 485 bfd_elf_generic_reloc, /* special_function */ 486 "R_LM32_GLOB_DAT", /* name */ 487 FALSE, /* partial_inplace */ 488 0xffffffff, /* src_mask */ 489 0xffffffff, /* dst_mask */ 490 FALSE), /* pcrel_offset */ 491 492 HOWTO (R_LM32_JMP_SLOT, /* type */ 493 0, /* rightshift */ 494 2, /* size (0 = byte, 1 = short, 2 = long) */ 495 32, /* bitsize */ 496 FALSE, /* pc_relative */ 497 0, /* bitpos */ 498 complain_overflow_bitfield, /* complain_on_overflow */ 499 bfd_elf_generic_reloc, /* special_function */ 500 "R_LM32_JMP_SLOT", /* name */ 501 FALSE, /* partial_inplace */ 502 0xffffffff, /* src_mask */ 503 0xffffffff, /* dst_mask */ 504 FALSE), /* pcrel_offset */ 505 506 HOWTO (R_LM32_RELATIVE, /* type */ 507 0, /* rightshift */ 508 2, /* size (0 = byte, 1 = short, 2 = long) */ 509 32, /* bitsize */ 510 FALSE, /* pc_relative */ 511 0, /* bitpos */ 512 complain_overflow_bitfield, /* complain_on_overflow */ 513 bfd_elf_generic_reloc, /* special_function */ 514 "R_LM32_RELATIVE", /* name */ 515 FALSE, /* partial_inplace */ 516 0xffffffff, /* src_mask */ 517 0xffffffff, /* dst_mask */ 518 FALSE), /* pcrel_offset */ 519 520 }; 521 522 /* Map BFD reloc types to lm32 ELF reloc types. */ 523 524 struct lm32_reloc_map 525 { 526 bfd_reloc_code_real_type bfd_reloc_val; 527 unsigned char elf_reloc_val; 528 }; 529 530 static const struct lm32_reloc_map lm32_reloc_map[] = 531 { 532 { BFD_RELOC_NONE, R_LM32_NONE }, 533 { BFD_RELOC_8, R_LM32_8 }, 534 { BFD_RELOC_16, R_LM32_16 }, 535 { BFD_RELOC_32, R_LM32_32 }, 536 { BFD_RELOC_HI16, R_LM32_HI16 }, 537 { BFD_RELOC_LO16, R_LM32_LO16 }, 538 { BFD_RELOC_GPREL16, R_LM32_GPREL16 }, 539 { BFD_RELOC_LM32_CALL, R_LM32_CALL }, 540 { BFD_RELOC_LM32_BRANCH, R_LM32_BRANCH }, 541 { BFD_RELOC_VTABLE_INHERIT, R_LM32_GNU_VTINHERIT }, 542 { BFD_RELOC_VTABLE_ENTRY, R_LM32_GNU_VTENTRY }, 543 { BFD_RELOC_LM32_16_GOT, R_LM32_16_GOT }, 544 { BFD_RELOC_LM32_GOTOFF_HI16, R_LM32_GOTOFF_HI16 }, 545 { BFD_RELOC_LM32_GOTOFF_LO16, R_LM32_GOTOFF_LO16 }, 546 { BFD_RELOC_LM32_COPY, R_LM32_COPY }, 547 { BFD_RELOC_LM32_GLOB_DAT, R_LM32_GLOB_DAT }, 548 { BFD_RELOC_LM32_JMP_SLOT, R_LM32_JMP_SLOT }, 549 { BFD_RELOC_LM32_RELATIVE, R_LM32_RELATIVE }, 550 }; 551 552 static reloc_howto_type * 553 lm32_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, 554 bfd_reloc_code_real_type code) 555 { 556 unsigned int i; 557 558 for (i = 0; i < sizeof (lm32_reloc_map) / sizeof (lm32_reloc_map[0]); i++) 559 if (lm32_reloc_map[i].bfd_reloc_val == code) 560 return &lm32_elf_howto_table[lm32_reloc_map[i].elf_reloc_val]; 561 return NULL; 562 } 563 564 static reloc_howto_type * 565 lm32_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 566 const char *r_name) 567 { 568 unsigned int i; 569 570 for (i = 0; 571 i < sizeof (lm32_elf_howto_table) / sizeof (lm32_elf_howto_table[0]); 572 i++) 573 if (lm32_elf_howto_table[i].name != NULL 574 && strcasecmp (lm32_elf_howto_table[i].name, r_name) == 0) 575 return &lm32_elf_howto_table[i]; 576 577 return NULL; 578 } 579 580 581 /* Set the howto pointer for an Lattice Mico32 ELF reloc. */ 582 583 static void 584 lm32_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED, 585 arelent *cache_ptr, 586 Elf_Internal_Rela *dst) 587 { 588 unsigned int r_type; 589 590 r_type = ELF32_R_TYPE (dst->r_info); 591 if (r_type >= (unsigned int) R_LM32_max) 592 { 593 _bfd_error_handler (_("%B: invalid LM32 reloc number: %d"), abfd, r_type); 594 r_type = 0; 595 } 596 cache_ptr->howto = &lm32_elf_howto_table[r_type]; 597 } 598 599 /* Set the right machine number for an Lattice Mico32 ELF file. */ 600 601 static bfd_boolean 602 lm32_elf_object_p (bfd *abfd) 603 { 604 return bfd_default_set_arch_mach (abfd, bfd_arch_lm32, bfd_mach_lm32); 605 } 606 607 /* Set machine type flags just before file is written out. */ 608 609 static void 610 lm32_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED) 611 { 612 elf_elfheader (abfd)->e_machine = EM_LATTICEMICO32; 613 elf_elfheader (abfd)->e_flags &=~ EF_LM32_MACH; 614 switch (bfd_get_mach (abfd)) 615 { 616 case bfd_mach_lm32: 617 elf_elfheader (abfd)->e_flags |= E_LM32_MACH; 618 break; 619 default: 620 abort (); 621 } 622 } 623 624 /* Set the GP value for OUTPUT_BFD. Returns FALSE if this is a 625 dangerous relocation. */ 626 627 static bfd_boolean 628 lm32_elf_assign_gp (bfd *output_bfd, bfd_vma *pgp) 629 { 630 unsigned int count; 631 asymbol **sym; 632 unsigned int i; 633 634 /* If we've already figured out what GP will be, just return it. */ 635 *pgp = _bfd_get_gp_value (output_bfd); 636 if (*pgp) 637 return TRUE; 638 639 count = bfd_get_symcount (output_bfd); 640 sym = bfd_get_outsymbols (output_bfd); 641 642 /* The linker script will have created a symbol named `_gp' with the 643 appropriate value. */ 644 if (sym == NULL) 645 i = count; 646 else 647 { 648 for (i = 0; i < count; i++, sym++) 649 { 650 const char *name; 651 652 name = bfd_asymbol_name (*sym); 653 if (*name == '_' && strcmp (name, "_gp") == 0) 654 { 655 *pgp = bfd_asymbol_value (*sym); 656 _bfd_set_gp_value (output_bfd, *pgp); 657 break; 658 } 659 } 660 } 661 662 if (i >= count) 663 { 664 /* Only get the error once. */ 665 *pgp = 4; 666 _bfd_set_gp_value (output_bfd, *pgp); 667 return FALSE; 668 } 669 670 return TRUE; 671 } 672 673 /* We have to figure out the gp value, so that we can adjust the 674 symbol value correctly. We look up the symbol _gp in the output 675 BFD. If we can't find it, we're stuck. We cache it in the ELF 676 target data. We don't need to adjust the symbol value for an 677 external symbol if we are producing relocatable output. */ 678 679 static bfd_reloc_status_type 680 lm32_elf_final_gp (bfd *output_bfd, asymbol *symbol, bfd_boolean relocatable, 681 char **error_message, bfd_vma *pgp) 682 { 683 if (bfd_is_und_section (symbol->section) && !relocatable) 684 { 685 *pgp = 0; 686 return bfd_reloc_undefined; 687 } 688 689 *pgp = _bfd_get_gp_value (output_bfd); 690 if (*pgp == 0 && (!relocatable || (symbol->flags & BSF_SECTION_SYM) != 0)) 691 { 692 if (relocatable) 693 { 694 /* Make up a value. */ 695 *pgp = symbol->section->output_section->vma + 0x4000; 696 _bfd_set_gp_value (output_bfd, *pgp); 697 } 698 else if (!lm32_elf_assign_gp (output_bfd, pgp)) 699 { 700 *error_message = 701 (char *) 702 _("global pointer relative relocation when _gp not defined"); 703 return bfd_reloc_dangerous; 704 } 705 } 706 707 return bfd_reloc_ok; 708 } 709 710 static bfd_reloc_status_type 711 lm32_elf_do_gprel_relocate (bfd *abfd, 712 reloc_howto_type *howto, 713 asection *input_section ATTRIBUTE_UNUSED, 714 bfd_byte *data, 715 bfd_vma offset, 716 bfd_vma symbol_value, 717 bfd_vma addend) 718 { 719 return _bfd_final_link_relocate (howto, abfd, input_section, 720 data, offset, symbol_value, addend); 721 } 722 723 static bfd_reloc_status_type 724 lm32_elf_gprel_reloc (bfd *abfd, 725 arelent *reloc_entry, 726 asymbol *symbol, 727 void *data, 728 asection *input_section, 729 bfd *output_bfd, 730 char **msg) 731 { 732 bfd_vma relocation; 733 bfd_vma gp; 734 bfd_reloc_status_type r; 735 736 if (output_bfd != (bfd *) NULL 737 && (symbol->flags & BSF_SECTION_SYM) == 0 738 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) 739 { 740 reloc_entry->address += input_section->output_offset; 741 return bfd_reloc_ok; 742 } 743 744 if (output_bfd != NULL) 745 return bfd_reloc_ok; 746 747 relocation = symbol->value 748 + symbol->section->output_section->vma + symbol->section->output_offset; 749 750 if ((r = 751 lm32_elf_final_gp (abfd, symbol, FALSE, msg, &gp)) == bfd_reloc_ok) 752 { 753 relocation = relocation + reloc_entry->addend - gp; 754 reloc_entry->addend = 0; 755 if ((signed) relocation < -32768 || (signed) relocation > 32767) 756 { 757 *msg = _("global pointer relative address out of range"); 758 r = bfd_reloc_outofrange; 759 } 760 else 761 { 762 r = lm32_elf_do_gprel_relocate (abfd, reloc_entry->howto, 763 input_section, 764 data, reloc_entry->address, 765 relocation, reloc_entry->addend); 766 } 767 } 768 769 return r; 770 } 771 772 /* Find the segment number in which OSEC, and output section, is 773 located. */ 774 775 static unsigned 776 _lm32fdpic_osec_to_segment (bfd *output_bfd, asection *osec) 777 { 778 struct elf_segment_map *m; 779 Elf_Internal_Phdr *p; 780 781 /* Find the segment that contains the output_section. */ 782 for (m = elf_seg_map (output_bfd), p = elf_tdata (output_bfd)->phdr; 783 m != NULL; 784 m = m->next, p++) 785 { 786 int i; 787 788 for (i = m->count - 1; i >= 0; i--) 789 if (m->sections[i] == osec) 790 break; 791 792 if (i >= 0) 793 break; 794 } 795 796 return p - elf_tdata (output_bfd)->phdr; 797 } 798 799 /* Determine if an output section is read-only. */ 800 801 inline static bfd_boolean 802 _lm32fdpic_osec_readonly_p (bfd *output_bfd, asection *osec) 803 { 804 unsigned seg = _lm32fdpic_osec_to_segment (output_bfd, osec); 805 806 return ! (elf_tdata (output_bfd)->phdr[seg].p_flags & PF_W); 807 } 808 809 /* Relocate a section */ 810 811 static bfd_boolean 812 lm32_elf_relocate_section (bfd *output_bfd, 813 struct bfd_link_info *info, 814 bfd *input_bfd, 815 asection *input_section, 816 bfd_byte *contents, 817 Elf_Internal_Rela *relocs, 818 Elf_Internal_Sym *local_syms, 819 asection **local_sections) 820 { 821 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; 822 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd); 823 Elf_Internal_Rela *rel, *relend; 824 struct elf_lm32_link_hash_table *htab = lm32_elf_hash_table (info); 825 bfd *dynobj; 826 bfd_vma *local_got_offsets; 827 asection *sgot; 828 829 if (htab == NULL) 830 return FALSE; 831 832 dynobj = htab->root.dynobj; 833 local_got_offsets = elf_local_got_offsets (input_bfd); 834 835 sgot = htab->sgot; 836 837 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; 838 sym_hashes = elf_sym_hashes (input_bfd); 839 840 rel = relocs; 841 relend = relocs + input_section->reloc_count; 842 for (; rel < relend; rel++) 843 { 844 reloc_howto_type *howto; 845 unsigned int r_type; 846 unsigned long r_symndx; 847 Elf_Internal_Sym *sym; 848 asection *sec; 849 struct elf_link_hash_entry *h; 850 bfd_vma relocation; 851 bfd_vma gp; 852 bfd_reloc_status_type r; 853 const char *name = NULL; 854 855 r_symndx = ELF32_R_SYM (rel->r_info); 856 r_type = ELF32_R_TYPE (rel->r_info); 857 858 if (r_type == R_LM32_GNU_VTENTRY 859 || r_type == R_LM32_GNU_VTINHERIT ) 860 continue; 861 862 h = NULL; 863 sym = NULL; 864 sec = NULL; 865 866 howto = lm32_elf_howto_table + r_type; 867 868 if (r_symndx < symtab_hdr->sh_info) 869 { 870 /* It's a local symbol. */ 871 sym = local_syms + r_symndx; 872 sec = local_sections[r_symndx]; 873 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 874 name = bfd_elf_string_from_elf_section 875 (input_bfd, symtab_hdr->sh_link, sym->st_name); 876 name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name; 877 } 878 else 879 { 880 /* It's a global symbol. */ 881 bfd_boolean unresolved_reloc; 882 bfd_boolean warned, ignored; 883 884 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 885 r_symndx, symtab_hdr, sym_hashes, 886 h, sec, relocation, 887 unresolved_reloc, warned, ignored); 888 name = h->root.root.string; 889 } 890 891 if (sec != NULL && discarded_section (sec)) 892 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, 893 rel, 1, relend, howto, 0, contents); 894 895 if (info->relocatable) 896 { 897 /* This is a relocatable link. We don't have to change 898 anything, unless the reloc is against a section symbol, 899 in which case we have to adjust according to where the 900 section symbol winds up in the output section. */ 901 if (sym == NULL || ELF_ST_TYPE (sym->st_info) != STT_SECTION) 902 continue; 903 904 /* If partial_inplace, we need to store any additional addend 905 back in the section. */ 906 if (! howto->partial_inplace) 907 continue; 908 909 /* Shouldn't reach here. */ 910 abort (); 911 r = bfd_reloc_ok; 912 } 913 else 914 { 915 switch (howto->type) 916 { 917 case R_LM32_GPREL16: 918 if (!lm32_elf_assign_gp (output_bfd, &gp)) 919 r = bfd_reloc_dangerous; 920 else 921 { 922 relocation = relocation + rel->r_addend - gp; 923 rel->r_addend = 0; 924 if ((signed)relocation < -32768 || (signed)relocation > 32767) 925 r = bfd_reloc_outofrange; 926 else 927 { 928 r = _bfd_final_link_relocate (howto, input_bfd, 929 input_section, contents, 930 rel->r_offset, relocation, 931 rel->r_addend); 932 } 933 } 934 break; 935 case R_LM32_16_GOT: 936 /* Relocation is to the entry for this symbol in the global 937 offset table. */ 938 BFD_ASSERT (sgot != NULL); 939 if (h != NULL) 940 { 941 bfd_boolean dyn; 942 bfd_vma off; 943 944 off = h->got.offset; 945 BFD_ASSERT (off != (bfd_vma) -1); 946 947 dyn = htab->root.dynamic_sections_created; 948 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) 949 || (info->shared 950 && (info->symbolic 951 || h->dynindx == -1 952 || h->forced_local) 953 && h->def_regular)) 954 { 955 /* This is actually a static link, or it is a 956 -Bsymbolic link and the symbol is defined 957 locally, or the symbol was forced to be local 958 because of a version file. We must initialize 959 this entry in the global offset table. Since the 960 offset must always be a multiple of 4, we use the 961 least significant bit to record whether we have 962 initialized it already. 963 964 When doing a dynamic link, we create a .rela.got 965 relocation entry to initialize the value. This 966 is done in the finish_dynamic_symbol routine. */ 967 if ((off & 1) != 0) 968 off &= ~1; 969 else 970 { 971 /* Write entry in GOT */ 972 bfd_put_32 (output_bfd, relocation, 973 sgot->contents + off); 974 /* Create entry in .rofixup pointing to GOT entry. */ 975 if (IS_FDPIC (output_bfd) && h->root.type != bfd_link_hash_undefweak) 976 { 977 _lm32fdpic_add_rofixup (output_bfd, 978 lm32fdpic_fixup32_section 979 (info), 980 sgot->output_section->vma 981 + sgot->output_offset 982 + off); 983 } 984 /* Mark GOT entry as having been written. */ 985 h->got.offset |= 1; 986 } 987 } 988 989 relocation = sgot->output_offset + off; 990 } 991 else 992 { 993 bfd_vma off; 994 bfd_byte *loc; 995 996 BFD_ASSERT (local_got_offsets != NULL 997 && local_got_offsets[r_symndx] != (bfd_vma) -1); 998 999 /* Get offset into GOT table. */ 1000 off = local_got_offsets[r_symndx]; 1001 1002 /* The offset must always be a multiple of 4. We use 1003 the least significant bit to record whether we have 1004 already processed this entry. */ 1005 if ((off & 1) != 0) 1006 off &= ~1; 1007 else 1008 { 1009 /* Write entry in GOT. */ 1010 bfd_put_32 (output_bfd, relocation, sgot->contents + off); 1011 /* Create entry in .rofixup pointing to GOT entry. */ 1012 if (IS_FDPIC (output_bfd)) 1013 { 1014 _lm32fdpic_add_rofixup (output_bfd, 1015 lm32fdpic_fixup32_section 1016 (info), 1017 sgot->output_section->vma 1018 + sgot->output_offset 1019 + off); 1020 } 1021 1022 if (info->shared) 1023 { 1024 asection *srelgot; 1025 Elf_Internal_Rela outrel; 1026 1027 /* We need to generate a R_LM32_RELATIVE reloc 1028 for the dynamic linker. */ 1029 srelgot = bfd_get_linker_section (dynobj, 1030 ".rela.got"); 1031 BFD_ASSERT (srelgot != NULL); 1032 1033 outrel.r_offset = (sgot->output_section->vma 1034 + sgot->output_offset 1035 + off); 1036 outrel.r_info = ELF32_R_INFO (0, R_LM32_RELATIVE); 1037 outrel.r_addend = relocation; 1038 loc = srelgot->contents; 1039 loc += srelgot->reloc_count * sizeof (Elf32_External_Rela); 1040 bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc); 1041 ++srelgot->reloc_count; 1042 } 1043 1044 local_got_offsets[r_symndx] |= 1; 1045 } 1046 1047 1048 relocation = sgot->output_offset + off; 1049 } 1050 1051 /* Addend should be zero. */ 1052 if (rel->r_addend != 0) 1053 (*_bfd_error_handler) (_("internal error: addend should be zero for R_LM32_16_GOT")); 1054 1055 r = _bfd_final_link_relocate (howto, 1056 input_bfd, 1057 input_section, 1058 contents, 1059 rel->r_offset, 1060 relocation, 1061 rel->r_addend); 1062 break; 1063 1064 case R_LM32_GOTOFF_LO16: 1065 case R_LM32_GOTOFF_HI16: 1066 /* Relocation is offset from GOT. */ 1067 BFD_ASSERT (sgot != NULL); 1068 relocation -= sgot->output_section->vma; 1069 /* Account for sign-extension. */ 1070 if ((r_type == R_LM32_GOTOFF_HI16) 1071 && ((relocation + rel->r_addend) & 0x8000)) 1072 rel->r_addend += 0x10000; 1073 r = _bfd_final_link_relocate (howto, 1074 input_bfd, 1075 input_section, 1076 contents, 1077 rel->r_offset, 1078 relocation, 1079 rel->r_addend); 1080 break; 1081 1082 case R_LM32_32: 1083 if (IS_FDPIC (output_bfd)) 1084 { 1085 if ((!h) || (h && h->root.type != bfd_link_hash_undefweak)) 1086 { 1087 /* Only create .rofixup entries for relocs in loadable sections. */ 1088 if ((bfd_get_section_flags (output_bfd, input_section->output_section) 1089 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD)) 1090 1091 { 1092 /* Check address to be modified is writable. */ 1093 if (_lm32fdpic_osec_readonly_p (output_bfd, 1094 input_section 1095 ->output_section)) 1096 { 1097 info->callbacks->warning 1098 (info, 1099 _("cannot emit dynamic relocations in read-only section"), 1100 name, input_bfd, input_section, rel->r_offset); 1101 return FALSE; 1102 } 1103 /* Create entry in .rofixup section. */ 1104 _lm32fdpic_add_rofixup (output_bfd, 1105 lm32fdpic_fixup32_section (info), 1106 input_section->output_section->vma 1107 + input_section->output_offset 1108 + rel->r_offset); 1109 } 1110 } 1111 } 1112 /* Fall through. */ 1113 1114 default: 1115 r = _bfd_final_link_relocate (howto, 1116 input_bfd, 1117 input_section, 1118 contents, 1119 rel->r_offset, 1120 relocation, 1121 rel->r_addend); 1122 break; 1123 } 1124 } 1125 1126 if (r != bfd_reloc_ok) 1127 { 1128 const char *msg = NULL; 1129 arelent bfd_reloc; 1130 1131 lm32_info_to_howto_rela (input_bfd, &bfd_reloc, rel); 1132 howto = bfd_reloc.howto; 1133 1134 if (h != NULL) 1135 name = h->root.root.string; 1136 else 1137 { 1138 name = (bfd_elf_string_from_elf_section 1139 (input_bfd, symtab_hdr->sh_link, sym->st_name)); 1140 if (name == NULL || *name == '\0') 1141 name = bfd_section_name (input_bfd, sec); 1142 } 1143 1144 switch (r) 1145 { 1146 case bfd_reloc_overflow: 1147 if ((h != NULL) 1148 && (h->root.type == bfd_link_hash_undefweak)) 1149 break; 1150 if (! ((*info->callbacks->reloc_overflow) 1151 (info, (h ? &h->root : NULL), name, howto->name, 1152 (bfd_vma) 0, input_bfd, input_section, rel->r_offset))) 1153 return FALSE; 1154 break; 1155 1156 case bfd_reloc_undefined: 1157 if (! ((*info->callbacks->undefined_symbol) 1158 (info, name, input_bfd, input_section, 1159 rel->r_offset, TRUE))) 1160 return FALSE; 1161 break; 1162 1163 case bfd_reloc_outofrange: 1164 msg = _("internal error: out of range error"); 1165 goto common_error; 1166 1167 case bfd_reloc_notsupported: 1168 msg = _("internal error: unsupported relocation error"); 1169 goto common_error; 1170 1171 case bfd_reloc_dangerous: 1172 msg = _("internal error: dangerous error"); 1173 goto common_error; 1174 1175 default: 1176 msg = _("internal error: unknown error"); 1177 /* fall through */ 1178 1179 common_error: 1180 if (!((*info->callbacks->warning) 1181 (info, msg, name, input_bfd, input_section, 1182 rel->r_offset))) 1183 return FALSE; 1184 break; 1185 } 1186 } 1187 } 1188 1189 return TRUE; 1190 } 1191 1192 static asection * 1193 lm32_elf_gc_mark_hook (asection *sec, 1194 struct bfd_link_info *info, 1195 Elf_Internal_Rela *rel, 1196 struct elf_link_hash_entry *h, 1197 Elf_Internal_Sym *sym) 1198 { 1199 if (h != NULL) 1200 switch (ELF32_R_TYPE (rel->r_info)) 1201 { 1202 case R_LM32_GNU_VTINHERIT: 1203 case R_LM32_GNU_VTENTRY: 1204 return NULL; 1205 } 1206 1207 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 1208 } 1209 1210 static bfd_boolean 1211 lm32_elf_gc_sweep_hook (bfd *abfd, 1212 struct bfd_link_info *info ATTRIBUTE_UNUSED, 1213 asection *sec, 1214 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED) 1215 { 1216 /* Update the got entry reference counts for the section being removed. */ 1217 Elf_Internal_Shdr *symtab_hdr; 1218 struct elf_link_hash_entry **sym_hashes; 1219 bfd_signed_vma *local_got_refcounts; 1220 const Elf_Internal_Rela *rel, *relend; 1221 1222 elf_section_data (sec)->local_dynrel = NULL; 1223 1224 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 1225 sym_hashes = elf_sym_hashes (abfd); 1226 local_got_refcounts = elf_local_got_refcounts (abfd); 1227 1228 relend = relocs + sec->reloc_count; 1229 for (rel = relocs; rel < relend; rel++) 1230 { 1231 unsigned long r_symndx; 1232 struct elf_link_hash_entry *h = NULL; 1233 1234 r_symndx = ELF32_R_SYM (rel->r_info); 1235 if (r_symndx >= symtab_hdr->sh_info) 1236 { 1237 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 1238 while (h->root.type == bfd_link_hash_indirect 1239 || h->root.type == bfd_link_hash_warning) 1240 h = (struct elf_link_hash_entry *) h->root.u.i.link; 1241 } 1242 1243 switch (ELF32_R_TYPE (rel->r_info)) 1244 { 1245 case R_LM32_16_GOT: 1246 if (h != NULL) 1247 { 1248 if (h->got.refcount > 0) 1249 h->got.refcount--; 1250 } 1251 else 1252 { 1253 if (local_got_refcounts && local_got_refcounts[r_symndx] > 0) 1254 local_got_refcounts[r_symndx]--; 1255 } 1256 break; 1257 1258 default: 1259 break; 1260 } 1261 } 1262 return TRUE; 1263 } 1264 1265 /* Look through the relocs for a section during the first phase. */ 1266 1267 static bfd_boolean 1268 lm32_elf_check_relocs (bfd *abfd, 1269 struct bfd_link_info *info, 1270 asection *sec, 1271 const Elf_Internal_Rela *relocs) 1272 { 1273 Elf_Internal_Shdr *symtab_hdr; 1274 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; 1275 const Elf_Internal_Rela *rel; 1276 const Elf_Internal_Rela *rel_end; 1277 struct elf_lm32_link_hash_table *htab; 1278 bfd *dynobj; 1279 1280 if (info->relocatable) 1281 return TRUE; 1282 1283 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 1284 sym_hashes = elf_sym_hashes (abfd); 1285 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym); 1286 if (!elf_bad_symtab (abfd)) 1287 sym_hashes_end -= symtab_hdr->sh_info; 1288 1289 htab = lm32_elf_hash_table (info); 1290 if (htab == NULL) 1291 return FALSE; 1292 1293 dynobj = htab->root.dynobj; 1294 1295 rel_end = relocs + sec->reloc_count; 1296 for (rel = relocs; rel < rel_end; rel++) 1297 { 1298 int r_type; 1299 struct elf_link_hash_entry *h; 1300 unsigned long r_symndx; 1301 1302 r_symndx = ELF32_R_SYM (rel->r_info); 1303 r_type = ELF32_R_TYPE (rel->r_info); 1304 if (r_symndx < symtab_hdr->sh_info) 1305 h = NULL; 1306 else 1307 { 1308 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 1309 while (h->root.type == bfd_link_hash_indirect 1310 || h->root.type == bfd_link_hash_warning) 1311 h = (struct elf_link_hash_entry *) h->root.u.i.link; 1312 1313 /* PR15323, ref flags aren't set for references in the same 1314 object. */ 1315 h->root.non_ir_ref = 1; 1316 } 1317 1318 /* Some relocs require a global offset table. */ 1319 if (htab->sgot == NULL) 1320 { 1321 switch (r_type) 1322 { 1323 case R_LM32_16_GOT: 1324 case R_LM32_GOTOFF_HI16: 1325 case R_LM32_GOTOFF_LO16: 1326 if (dynobj == NULL) 1327 htab->root.dynobj = dynobj = abfd; 1328 if (! create_got_section (dynobj, info)) 1329 return FALSE; 1330 break; 1331 } 1332 } 1333 1334 /* Some relocs require a rofixup table. */ 1335 if (IS_FDPIC (abfd)) 1336 { 1337 switch (r_type) 1338 { 1339 case R_LM32_32: 1340 /* FDPIC requires a GOT if there is a .rofixup section 1341 (Normal ELF doesn't). */ 1342 if (dynobj == NULL) 1343 htab->root.dynobj = dynobj = abfd; 1344 if (! create_got_section (dynobj, info)) 1345 return FALSE; 1346 /* Create .rofixup section */ 1347 if (htab->sfixup32 == NULL) 1348 { 1349 if (! create_rofixup_section (dynobj, info)) 1350 return FALSE; 1351 } 1352 break; 1353 case R_LM32_16_GOT: 1354 case R_LM32_GOTOFF_HI16: 1355 case R_LM32_GOTOFF_LO16: 1356 /* Create .rofixup section. */ 1357 if (htab->sfixup32 == NULL) 1358 { 1359 if (dynobj == NULL) 1360 htab->root.dynobj = dynobj = abfd; 1361 if (! create_rofixup_section (dynobj, info)) 1362 return FALSE; 1363 } 1364 break; 1365 } 1366 } 1367 1368 switch (r_type) 1369 { 1370 case R_LM32_16_GOT: 1371 if (h != NULL) 1372 h->got.refcount += 1; 1373 else 1374 { 1375 bfd_signed_vma *local_got_refcounts; 1376 1377 /* This is a global offset table entry for a local symbol. */ 1378 local_got_refcounts = elf_local_got_refcounts (abfd); 1379 if (local_got_refcounts == NULL) 1380 { 1381 bfd_size_type size; 1382 1383 size = symtab_hdr->sh_info; 1384 size *= sizeof (bfd_signed_vma); 1385 local_got_refcounts = bfd_zalloc (abfd, size); 1386 if (local_got_refcounts == NULL) 1387 return FALSE; 1388 elf_local_got_refcounts (abfd) = local_got_refcounts; 1389 } 1390 local_got_refcounts[r_symndx] += 1; 1391 } 1392 break; 1393 1394 /* This relocation describes the C++ object vtable hierarchy. 1395 Reconstruct it for later use during GC. */ 1396 case R_LM32_GNU_VTINHERIT: 1397 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 1398 return FALSE; 1399 break; 1400 1401 /* This relocation describes which C++ vtable entries are actually 1402 used. Record for later use during GC. */ 1403 case R_LM32_GNU_VTENTRY: 1404 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 1405 return FALSE; 1406 break; 1407 1408 } 1409 } 1410 1411 return TRUE; 1412 } 1413 1414 /* Finish up the dynamic sections. */ 1415 1416 static bfd_boolean 1417 lm32_elf_finish_dynamic_sections (bfd *output_bfd, 1418 struct bfd_link_info *info) 1419 { 1420 struct elf_lm32_link_hash_table *htab; 1421 bfd *dynobj; 1422 asection *sdyn; 1423 asection *sgot; 1424 1425 htab = lm32_elf_hash_table (info); 1426 if (htab == NULL) 1427 return FALSE; 1428 1429 dynobj = htab->root.dynobj; 1430 1431 sgot = htab->sgotplt; 1432 sdyn = bfd_get_linker_section (dynobj, ".dynamic"); 1433 1434 if (htab->root.dynamic_sections_created) 1435 { 1436 asection *splt; 1437 Elf32_External_Dyn *dyncon, *dynconend; 1438 1439 BFD_ASSERT (sgot != NULL && sdyn != NULL); 1440 1441 dyncon = (Elf32_External_Dyn *) sdyn->contents; 1442 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); 1443 1444 for (; dyncon < dynconend; dyncon++) 1445 { 1446 Elf_Internal_Dyn dyn; 1447 asection *s; 1448 1449 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); 1450 1451 switch (dyn.d_tag) 1452 { 1453 default: 1454 break; 1455 1456 case DT_PLTGOT: 1457 s = htab->sgot->output_section; 1458 goto get_vma; 1459 case DT_JMPREL: 1460 s = htab->srelplt->output_section; 1461 get_vma: 1462 BFD_ASSERT (s != NULL); 1463 dyn.d_un.d_ptr = s->vma; 1464 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 1465 break; 1466 1467 case DT_PLTRELSZ: 1468 s = htab->srelplt->output_section; 1469 BFD_ASSERT (s != NULL); 1470 dyn.d_un.d_val = s->size; 1471 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 1472 break; 1473 1474 case DT_RELASZ: 1475 /* My reading of the SVR4 ABI indicates that the 1476 procedure linkage table relocs (DT_JMPREL) should be 1477 included in the overall relocs (DT_RELA). This is 1478 what Solaris does. However, UnixWare can not handle 1479 that case. Therefore, we override the DT_RELASZ entry 1480 here to make it not include the JMPREL relocs. Since 1481 the linker script arranges for .rela.plt to follow all 1482 other relocation sections, we don't have to worry 1483 about changing the DT_RELA entry. */ 1484 if (htab->srelplt != NULL) 1485 { 1486 s = htab->srelplt->output_section; 1487 dyn.d_un.d_val -= s->size; 1488 } 1489 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 1490 break; 1491 } 1492 } 1493 1494 /* Fill in the first entry in the procedure linkage table. */ 1495 splt = htab->splt; 1496 if (splt && splt->size > 0) 1497 { 1498 if (info->shared) 1499 { 1500 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD0, splt->contents); 1501 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD1, splt->contents + 4); 1502 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD2, splt->contents + 8); 1503 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD3, splt->contents + 12); 1504 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD4, splt->contents + 16); 1505 } 1506 else 1507 { 1508 unsigned long addr; 1509 /* addr = .got + 4 */ 1510 addr = sgot->output_section->vma + sgot->output_offset + 4; 1511 bfd_put_32 (output_bfd, 1512 PLT0_ENTRY_WORD0 | ((addr >> 16) & 0xffff), 1513 splt->contents); 1514 bfd_put_32 (output_bfd, 1515 PLT0_ENTRY_WORD1 | (addr & 0xffff), 1516 splt->contents + 4); 1517 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD2, splt->contents + 8); 1518 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD3, splt->contents + 12); 1519 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD4, splt->contents + 16); 1520 } 1521 1522 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 1523 PLT_ENTRY_SIZE; 1524 } 1525 } 1526 1527 /* Fill in the first three entries in the global offset table. */ 1528 if (sgot && sgot->size > 0) 1529 { 1530 if (sdyn == NULL) 1531 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); 1532 else 1533 bfd_put_32 (output_bfd, 1534 sdyn->output_section->vma + sdyn->output_offset, 1535 sgot->contents); 1536 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); 1537 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); 1538 1539 /* FIXME: This can be null if create_dynamic_sections wasn't called. */ 1540 if (elf_section_data (sgot->output_section) != NULL) 1541 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; 1542 } 1543 1544 if (lm32fdpic_fixup32_section (info)) 1545 { 1546 struct elf_link_hash_entry *hgot = elf_hash_table (info)->hgot; 1547 bfd_vma got_value = hgot->root.u.def.value 1548 + hgot->root.u.def.section->output_section->vma 1549 + hgot->root.u.def.section->output_offset; 1550 struct bfd_link_hash_entry *hend; 1551 1552 /* Last entry is pointer to GOT. */ 1553 _lm32fdpic_add_rofixup (output_bfd, lm32fdpic_fixup32_section (info), got_value); 1554 1555 /* Check we wrote enough entries. */ 1556 if (lm32fdpic_fixup32_section (info)->size 1557 != (lm32fdpic_fixup32_section (info)->reloc_count * 4)) 1558 { 1559 (*_bfd_error_handler) 1560 ("LINKER BUG: .rofixup section size mismatch: size/4 %d != relocs %d", 1561 lm32fdpic_fixup32_section (info)->size/4, 1562 lm32fdpic_fixup32_section (info)->reloc_count); 1563 return FALSE; 1564 } 1565 1566 hend = bfd_link_hash_lookup (info->hash, "__ROFIXUP_END__", 1567 FALSE, FALSE, TRUE); 1568 if (hend 1569 && (hend->type == bfd_link_hash_defined 1570 || hend->type == bfd_link_hash_defweak)) 1571 { 1572 bfd_vma value = 1573 lm32fdpic_fixup32_section (info)->output_section->vma 1574 + lm32fdpic_fixup32_section (info)->output_offset 1575 + lm32fdpic_fixup32_section (info)->size 1576 - hend->u.def.section->output_section->vma 1577 - hend->u.def.section->output_offset; 1578 BFD_ASSERT (hend->u.def.value == value); 1579 if (hend->u.def.value != value) 1580 { 1581 (*_bfd_error_handler) 1582 ("LINKER BUG: .rofixup section hend->u.def.value != value: %ld != %ld", hend->u.def.value, value); 1583 return FALSE; 1584 } 1585 } 1586 } 1587 1588 return TRUE; 1589 } 1590 1591 /* Finish up dynamic symbol handling. We set the contents of various 1592 dynamic sections here. */ 1593 1594 static bfd_boolean 1595 lm32_elf_finish_dynamic_symbol (bfd *output_bfd, 1596 struct bfd_link_info *info, 1597 struct elf_link_hash_entry *h, 1598 Elf_Internal_Sym *sym) 1599 { 1600 struct elf_lm32_link_hash_table *htab; 1601 bfd_byte *loc; 1602 1603 htab = lm32_elf_hash_table (info); 1604 if (htab == NULL) 1605 return FALSE; 1606 1607 if (h->plt.offset != (bfd_vma) -1) 1608 { 1609 asection *splt; 1610 asection *sgot; 1611 asection *srela; 1612 1613 bfd_vma plt_index; 1614 bfd_vma got_offset; 1615 Elf_Internal_Rela rela; 1616 1617 /* This symbol has an entry in the procedure linkage table. Set 1618 it up. */ 1619 BFD_ASSERT (h->dynindx != -1); 1620 1621 splt = htab->splt; 1622 sgot = htab->sgotplt; 1623 srela = htab->srelplt; 1624 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL); 1625 1626 /* Get the index in the procedure linkage table which 1627 corresponds to this symbol. This is the index of this symbol 1628 in all the symbols for which we are making plt entries. The 1629 first entry in the procedure linkage table is reserved. */ 1630 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; 1631 1632 /* Get the offset into the .got table of the entry that 1633 corresponds to this function. Each .got entry is 4 bytes. 1634 The first three are reserved. */ 1635 got_offset = (plt_index + 3) * 4; 1636 1637 /* Fill in the entry in the procedure linkage table. */ 1638 if (! info->shared) 1639 { 1640 /* TODO */ 1641 } 1642 else 1643 { 1644 /* TODO */ 1645 } 1646 1647 /* Fill in the entry in the global offset table. */ 1648 bfd_put_32 (output_bfd, 1649 (splt->output_section->vma 1650 + splt->output_offset 1651 + h->plt.offset 1652 + 12), /* same offset */ 1653 sgot->contents + got_offset); 1654 1655 /* Fill in the entry in the .rela.plt section. */ 1656 rela.r_offset = (sgot->output_section->vma 1657 + sgot->output_offset 1658 + got_offset); 1659 rela.r_info = ELF32_R_INFO (h->dynindx, R_LM32_JMP_SLOT); 1660 rela.r_addend = 0; 1661 loc = srela->contents; 1662 loc += plt_index * sizeof (Elf32_External_Rela); 1663 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 1664 1665 if (!h->def_regular) 1666 { 1667 /* Mark the symbol as undefined, rather than as defined in 1668 the .plt section. Leave the value alone. */ 1669 sym->st_shndx = SHN_UNDEF; 1670 } 1671 1672 } 1673 1674 if (h->got.offset != (bfd_vma) -1) 1675 { 1676 asection *sgot; 1677 asection *srela; 1678 Elf_Internal_Rela rela; 1679 1680 /* This symbol has an entry in the global offset table. Set it 1681 up. */ 1682 sgot = htab->sgot; 1683 srela = htab->srelgot; 1684 BFD_ASSERT (sgot != NULL && srela != NULL); 1685 1686 rela.r_offset = (sgot->output_section->vma 1687 + sgot->output_offset 1688 + (h->got.offset &~ 1)); 1689 1690 /* If this is a -Bsymbolic link, and the symbol is defined 1691 locally, we just want to emit a RELATIVE reloc. Likewise if 1692 the symbol was forced to be local because of a version file. 1693 The entry in the global offset table will already have been 1694 initialized in the relocate_section function. */ 1695 if (info->shared 1696 && (info->symbolic 1697 || h->dynindx == -1 1698 || h->forced_local) 1699 && h->def_regular) 1700 { 1701 rela.r_info = ELF32_R_INFO (0, R_LM32_RELATIVE); 1702 rela.r_addend = (h->root.u.def.value 1703 + h->root.u.def.section->output_section->vma 1704 + h->root.u.def.section->output_offset); 1705 } 1706 else 1707 { 1708 BFD_ASSERT ((h->got.offset & 1) == 0); 1709 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset); 1710 rela.r_info = ELF32_R_INFO (h->dynindx, R_LM32_GLOB_DAT); 1711 rela.r_addend = 0; 1712 } 1713 1714 loc = srela->contents; 1715 loc += srela->reloc_count * sizeof (Elf32_External_Rela); 1716 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 1717 ++srela->reloc_count; 1718 } 1719 1720 if (h->needs_copy) 1721 { 1722 asection *s; 1723 Elf_Internal_Rela rela; 1724 1725 /* This symbols needs a copy reloc. Set it up. */ 1726 BFD_ASSERT (h->dynindx != -1 1727 && (h->root.type == bfd_link_hash_defined 1728 || h->root.type == bfd_link_hash_defweak)); 1729 1730 s = bfd_get_linker_section (htab->root.dynobj, ".rela.bss"); 1731 BFD_ASSERT (s != NULL); 1732 1733 rela.r_offset = (h->root.u.def.value 1734 + h->root.u.def.section->output_section->vma 1735 + h->root.u.def.section->output_offset); 1736 rela.r_info = ELF32_R_INFO (h->dynindx, R_LM32_COPY); 1737 rela.r_addend = 0; 1738 loc = s->contents; 1739 loc += s->reloc_count * sizeof (Elf32_External_Rela); 1740 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 1741 ++s->reloc_count; 1742 } 1743 1744 /* Mark some specially defined symbols as absolute. */ 1745 if (h == htab->root.hdynamic || h == htab->root.hgot) 1746 sym->st_shndx = SHN_ABS; 1747 1748 return TRUE; 1749 } 1750 1751 static enum elf_reloc_type_class 1752 lm32_elf_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, 1753 const asection *rel_sec ATTRIBUTE_UNUSED, 1754 const Elf_Internal_Rela *rela) 1755 { 1756 switch ((int) ELF32_R_TYPE (rela->r_info)) 1757 { 1758 case R_LM32_RELATIVE: return reloc_class_relative; 1759 case R_LM32_JMP_SLOT: return reloc_class_plt; 1760 case R_LM32_COPY: return reloc_class_copy; 1761 default: return reloc_class_normal; 1762 } 1763 } 1764 1765 /* Adjust a symbol defined by a dynamic object and referenced by a 1766 regular object. The current definition is in some section of the 1767 dynamic object, but we're not including those sections. We have to 1768 change the definition to something the rest of the link can 1769 understand. */ 1770 1771 static bfd_boolean 1772 lm32_elf_adjust_dynamic_symbol (struct bfd_link_info *info, 1773 struct elf_link_hash_entry *h) 1774 { 1775 struct elf_lm32_link_hash_table *htab; 1776 struct elf_lm32_link_hash_entry *eh; 1777 struct elf_lm32_dyn_relocs *p; 1778 bfd *dynobj; 1779 asection *s; 1780 1781 dynobj = elf_hash_table (info)->dynobj; 1782 1783 /* Make sure we know what is going on here. */ 1784 BFD_ASSERT (dynobj != NULL 1785 && (h->needs_plt 1786 || h->u.weakdef != NULL 1787 || (h->def_dynamic 1788 && h->ref_regular 1789 && !h->def_regular))); 1790 1791 /* If this is a function, put it in the procedure linkage table. We 1792 will fill in the contents of the procedure linkage table later, 1793 when we know the address of the .got section. */ 1794 if (h->type == STT_FUNC 1795 || h->needs_plt) 1796 { 1797 if (! info->shared 1798 && !h->def_dynamic 1799 && !h->ref_dynamic 1800 && h->root.type != bfd_link_hash_undefweak 1801 && h->root.type != bfd_link_hash_undefined) 1802 { 1803 /* This case can occur if we saw a PLT reloc in an input 1804 file, but the symbol was never referred to by a dynamic 1805 object. In such a case, we don't actually need to build 1806 a procedure linkage table, and we can just do a PCREL 1807 reloc instead. */ 1808 h->plt.offset = (bfd_vma) -1; 1809 h->needs_plt = 0; 1810 } 1811 1812 return TRUE; 1813 } 1814 else 1815 h->plt.offset = (bfd_vma) -1; 1816 1817 /* If this is a weak symbol, and there is a real definition, the 1818 processor independent code will have arranged for us to see the 1819 real definition first, and we can just use the same value. */ 1820 if (h->u.weakdef != NULL) 1821 { 1822 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined 1823 || h->u.weakdef->root.type == bfd_link_hash_defweak); 1824 h->root.u.def.section = h->u.weakdef->root.u.def.section; 1825 h->root.u.def.value = h->u.weakdef->root.u.def.value; 1826 return TRUE; 1827 } 1828 1829 /* This is a reference to a symbol defined by a dynamic object which 1830 is not a function. */ 1831 1832 /* If we are creating a shared library, we must presume that the 1833 only references to the symbol are via the global offset table. 1834 For such cases we need not do anything here; the relocations will 1835 be handled correctly by relocate_section. */ 1836 if (info->shared) 1837 return TRUE; 1838 1839 /* If there are no references to this symbol that do not use the 1840 GOT, we don't need to generate a copy reloc. */ 1841 if (!h->non_got_ref) 1842 return TRUE; 1843 1844 /* If -z nocopyreloc was given, we won't generate them either. */ 1845 if (info->nocopyreloc) 1846 { 1847 h->non_got_ref = 0; 1848 return TRUE; 1849 } 1850 1851 eh = (struct elf_lm32_link_hash_entry *) h; 1852 for (p = eh->dyn_relocs; p != NULL; p = p->next) 1853 { 1854 s = p->sec->output_section; 1855 if (s != NULL && (s->flags & (SEC_READONLY | SEC_HAS_CONTENTS)) != 0) 1856 break; 1857 } 1858 1859 /* If we didn't find any dynamic relocs in sections which needs the 1860 copy reloc, then we'll be keeping the dynamic relocs and avoiding 1861 the copy reloc. */ 1862 if (p == NULL) 1863 { 1864 h->non_got_ref = 0; 1865 return TRUE; 1866 } 1867 1868 /* We must allocate the symbol in our .dynbss section, which will 1869 become part of the .bss section of the executable. There will be 1870 an entry for this symbol in the .dynsym section. The dynamic 1871 object will contain position independent code, so all references 1872 from the dynamic object to this symbol will go through the global 1873 offset table. The dynamic linker will use the .dynsym entry to 1874 determine the address it must put in the global offset table, so 1875 both the dynamic object and the regular object will refer to the 1876 same memory location for the variable. */ 1877 1878 htab = lm32_elf_hash_table (info); 1879 if (htab == NULL) 1880 return FALSE; 1881 1882 s = htab->sdynbss; 1883 BFD_ASSERT (s != NULL); 1884 1885 /* We must generate a R_LM32_COPY reloc to tell the dynamic linker 1886 to copy the initial value out of the dynamic object and into the 1887 runtime process image. We need to remember the offset into the 1888 .rela.bss section we are going to use. */ 1889 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) 1890 { 1891 asection *srel; 1892 1893 srel = htab->srelbss; 1894 BFD_ASSERT (srel != NULL); 1895 srel->size += sizeof (Elf32_External_Rela); 1896 h->needs_copy = 1; 1897 } 1898 1899 return _bfd_elf_adjust_dynamic_copy (info, h, s); 1900 } 1901 1902 /* Allocate space in .plt, .got and associated reloc sections for 1903 dynamic relocs. */ 1904 1905 static bfd_boolean 1906 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) 1907 { 1908 struct bfd_link_info *info; 1909 struct elf_lm32_link_hash_table *htab; 1910 struct elf_lm32_link_hash_entry *eh; 1911 struct elf_lm32_dyn_relocs *p; 1912 1913 if (h->root.type == bfd_link_hash_indirect) 1914 return TRUE; 1915 1916 info = (struct bfd_link_info *) inf; 1917 htab = lm32_elf_hash_table (info); 1918 if (htab == NULL) 1919 return FALSE; 1920 1921 eh = (struct elf_lm32_link_hash_entry *) h; 1922 1923 if (htab->root.dynamic_sections_created 1924 && h->plt.refcount > 0) 1925 { 1926 /* Make sure this symbol is output as a dynamic symbol. 1927 Undefined weak syms won't yet be marked as dynamic. */ 1928 if (h->dynindx == -1 1929 && !h->forced_local) 1930 { 1931 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1932 return FALSE; 1933 } 1934 1935 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h)) 1936 { 1937 asection *s = htab->splt; 1938 1939 /* If this is the first .plt entry, make room for the special 1940 first entry. */ 1941 if (s->size == 0) 1942 s->size += PLT_ENTRY_SIZE; 1943 1944 h->plt.offset = s->size; 1945 1946 /* If this symbol is not defined in a regular file, and we are 1947 not generating a shared library, then set the symbol to this 1948 location in the .plt. This is required to make function 1949 pointers compare as equal between the normal executable and 1950 the shared library. */ 1951 if (! info->shared 1952 && !h->def_regular) 1953 { 1954 h->root.u.def.section = s; 1955 h->root.u.def.value = h->plt.offset; 1956 } 1957 1958 /* Make room for this entry. */ 1959 s->size += PLT_ENTRY_SIZE; 1960 1961 /* We also need to make an entry in the .got.plt section, which 1962 will be placed in the .got section by the linker script. */ 1963 htab->sgotplt->size += 4; 1964 1965 /* We also need to make an entry in the .rel.plt section. */ 1966 htab->srelplt->size += sizeof (Elf32_External_Rela); 1967 } 1968 else 1969 { 1970 h->plt.offset = (bfd_vma) -1; 1971 h->needs_plt = 0; 1972 } 1973 } 1974 else 1975 { 1976 h->plt.offset = (bfd_vma) -1; 1977 h->needs_plt = 0; 1978 } 1979 1980 if (h->got.refcount > 0) 1981 { 1982 asection *s; 1983 bfd_boolean dyn; 1984 1985 /* Make sure this symbol is output as a dynamic symbol. 1986 Undefined weak syms won't yet be marked as dynamic. */ 1987 if (h->dynindx == -1 1988 && !h->forced_local) 1989 { 1990 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1991 return FALSE; 1992 } 1993 1994 s = htab->sgot; 1995 1996 h->got.offset = s->size; 1997 s->size += 4; 1998 dyn = htab->root.dynamic_sections_created; 1999 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)) 2000 htab->srelgot->size += sizeof (Elf32_External_Rela); 2001 } 2002 else 2003 h->got.offset = (bfd_vma) -1; 2004 2005 if (eh->dyn_relocs == NULL) 2006 return TRUE; 2007 2008 /* In the shared -Bsymbolic case, discard space allocated for 2009 dynamic pc-relative relocs against symbols which turn out to be 2010 defined in regular objects. For the normal shared case, discard 2011 space for pc-relative relocs that have become local due to symbol 2012 visibility changes. */ 2013 2014 if (info->shared) 2015 { 2016 if (h->def_regular 2017 && (h->forced_local 2018 || info->symbolic)) 2019 { 2020 struct elf_lm32_dyn_relocs **pp; 2021 2022 for (pp = &eh->dyn_relocs; (p = *pp) != NULL;) 2023 { 2024 p->count -= p->pc_count; 2025 p->pc_count = 0; 2026 if (p->count == 0) 2027 *pp = p->next; 2028 else 2029 pp = &p->next; 2030 } 2031 } 2032 2033 /* Also discard relocs on undefined weak syms with non-default 2034 visibility. */ 2035 if (eh->dyn_relocs != NULL 2036 && h->root.type == bfd_link_hash_undefweak) 2037 { 2038 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) 2039 eh->dyn_relocs = NULL; 2040 2041 /* Make sure undefined weak symbols are output as a dynamic 2042 symbol in PIEs. */ 2043 else if (h->dynindx == -1 2044 && !h->forced_local) 2045 { 2046 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 2047 return FALSE; 2048 } 2049 } 2050 } 2051 else 2052 { 2053 /* For the non-shared case, discard space for relocs against 2054 symbols which turn out to need copy relocs or are not 2055 dynamic. */ 2056 2057 if (!h->non_got_ref 2058 && ((h->def_dynamic 2059 && !h->def_regular) 2060 || (htab->root.dynamic_sections_created 2061 && (h->root.type == bfd_link_hash_undefweak 2062 || h->root.type == bfd_link_hash_undefined)))) 2063 { 2064 /* Make sure this symbol is output as a dynamic symbol. 2065 Undefined weak syms won't yet be marked as dynamic. */ 2066 if (h->dynindx == -1 2067 && !h->forced_local) 2068 { 2069 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 2070 return FALSE; 2071 } 2072 2073 /* If that succeeded, we know we'll be keeping all the 2074 relocs. */ 2075 if (h->dynindx != -1) 2076 goto keep; 2077 } 2078 2079 eh->dyn_relocs = NULL; 2080 2081 keep: ; 2082 } 2083 2084 /* Finally, allocate space. */ 2085 for (p = eh->dyn_relocs; p != NULL; p = p->next) 2086 { 2087 asection *sreloc = elf_section_data (p->sec)->sreloc; 2088 sreloc->size += p->count * sizeof (Elf32_External_Rela); 2089 } 2090 2091 return TRUE; 2092 } 2093 2094 /* Find any dynamic relocs that apply to read-only sections. */ 2095 2096 static bfd_boolean 2097 readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf) 2098 { 2099 struct elf_lm32_link_hash_entry *eh; 2100 struct elf_lm32_dyn_relocs *p; 2101 2102 eh = (struct elf_lm32_link_hash_entry *) h; 2103 for (p = eh->dyn_relocs; p != NULL; p = p->next) 2104 { 2105 asection *s = p->sec->output_section; 2106 2107 if (s != NULL && (s->flags & SEC_READONLY) != 0) 2108 { 2109 struct bfd_link_info *info = (struct bfd_link_info *) inf; 2110 2111 info->flags |= DF_TEXTREL; 2112 2113 /* Not an error, just cut short the traversal. */ 2114 return FALSE; 2115 } 2116 } 2117 return TRUE; 2118 } 2119 2120 /* Set the sizes of the dynamic sections. */ 2121 2122 static bfd_boolean 2123 lm32_elf_size_dynamic_sections (bfd *output_bfd, 2124 struct bfd_link_info *info) 2125 { 2126 struct elf_lm32_link_hash_table *htab; 2127 bfd *dynobj; 2128 asection *s; 2129 bfd_boolean relocs; 2130 bfd *ibfd; 2131 2132 htab = lm32_elf_hash_table (info); 2133 if (htab == NULL) 2134 return FALSE; 2135 2136 dynobj = htab->root.dynobj; 2137 BFD_ASSERT (dynobj != NULL); 2138 2139 if (htab->root.dynamic_sections_created) 2140 { 2141 /* Set the contents of the .interp section to the interpreter. */ 2142 if (info->executable) 2143 { 2144 s = bfd_get_linker_section (dynobj, ".interp"); 2145 BFD_ASSERT (s != NULL); 2146 s->size = sizeof ELF_DYNAMIC_INTERPRETER; 2147 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; 2148 } 2149 } 2150 2151 /* Set up .got offsets for local syms, and space for local dynamic 2152 relocs. */ 2153 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 2154 { 2155 bfd_signed_vma *local_got; 2156 bfd_signed_vma *end_local_got; 2157 bfd_size_type locsymcount; 2158 Elf_Internal_Shdr *symtab_hdr; 2159 asection *srel; 2160 2161 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) 2162 continue; 2163 2164 for (s = ibfd->sections; s != NULL; s = s->next) 2165 { 2166 struct elf_lm32_dyn_relocs *p; 2167 2168 for (p = ((struct elf_lm32_dyn_relocs *) 2169 elf_section_data (s)->local_dynrel); 2170 p != NULL; 2171 p = p->next) 2172 { 2173 if (! bfd_is_abs_section (p->sec) 2174 && bfd_is_abs_section (p->sec->output_section)) 2175 { 2176 /* Input section has been discarded, either because 2177 it is a copy of a linkonce section or due to 2178 linker script /DISCARD/, so we'll be discarding 2179 the relocs too. */ 2180 } 2181 else if (p->count != 0) 2182 { 2183 srel = elf_section_data (p->sec)->sreloc; 2184 srel->size += p->count * sizeof (Elf32_External_Rela); 2185 if ((p->sec->output_section->flags & SEC_READONLY) != 0) 2186 info->flags |= DF_TEXTREL; 2187 } 2188 } 2189 } 2190 2191 local_got = elf_local_got_refcounts (ibfd); 2192 if (!local_got) 2193 continue; 2194 2195 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; 2196 locsymcount = symtab_hdr->sh_info; 2197 end_local_got = local_got + locsymcount; 2198 s = htab->sgot; 2199 srel = htab->srelgot; 2200 for (; local_got < end_local_got; ++local_got) 2201 { 2202 if (*local_got > 0) 2203 { 2204 *local_got = s->size; 2205 s->size += 4; 2206 if (info->shared) 2207 srel->size += sizeof (Elf32_External_Rela); 2208 } 2209 else 2210 *local_got = (bfd_vma) -1; 2211 } 2212 } 2213 2214 /* Allocate global sym .plt and .got entries, and space for global 2215 sym dynamic relocs. */ 2216 elf_link_hash_traverse (&htab->root, allocate_dynrelocs, info); 2217 2218 /* We now have determined the sizes of the various dynamic sections. 2219 Allocate memory for them. */ 2220 relocs = FALSE; 2221 for (s = dynobj->sections; s != NULL; s = s->next) 2222 { 2223 if ((s->flags & SEC_LINKER_CREATED) == 0) 2224 continue; 2225 2226 if (s == htab->splt 2227 || s == htab->sgot 2228 || s == htab->sgotplt 2229 || s == htab->sdynbss) 2230 { 2231 /* Strip this section if we don't need it; see the 2232 comment below. */ 2233 } 2234 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) 2235 { 2236 if (s->size != 0 && s != htab->srelplt) 2237 relocs = TRUE; 2238 2239 /* We use the reloc_count field as a counter if we need 2240 to copy relocs into the output file. */ 2241 s->reloc_count = 0; 2242 } 2243 else 2244 /* It's not one of our sections, so don't allocate space. */ 2245 continue; 2246 2247 if (s->size == 0) 2248 { 2249 /* If we don't need this section, strip it from the 2250 output file. This is mostly to handle .rela.bss and 2251 .rela.plt. We must create both sections in 2252 create_dynamic_sections, because they must be created 2253 before the linker maps input sections to output 2254 sections. The linker does that before 2255 adjust_dynamic_symbol is called, and it is that 2256 function which decides whether anything needs to go 2257 into these sections. */ 2258 s->flags |= SEC_EXCLUDE; 2259 continue; 2260 } 2261 2262 if ((s->flags & SEC_HAS_CONTENTS) == 0) 2263 continue; 2264 2265 /* Allocate memory for the section contents. We use bfd_zalloc 2266 here in case unused entries are not reclaimed before the 2267 section's contents are written out. This should not happen, 2268 but this way if it does, we get a R_LM32_NONE reloc instead 2269 of garbage. */ 2270 s->contents = bfd_zalloc (dynobj, s->size); 2271 if (s->contents == NULL) 2272 return FALSE; 2273 } 2274 2275 if (htab->root.dynamic_sections_created) 2276 { 2277 /* Add some entries to the .dynamic section. We fill in the 2278 values later, in lm32_elf_finish_dynamic_sections, but we 2279 must add the entries now so that we get the correct size for 2280 the .dynamic section. The DT_DEBUG entry is filled in by the 2281 dynamic linker and used by the debugger. */ 2282 #define add_dynamic_entry(TAG, VAL) \ 2283 _bfd_elf_add_dynamic_entry (info, TAG, VAL) 2284 2285 if (info->executable) 2286 { 2287 if (! add_dynamic_entry (DT_DEBUG, 0)) 2288 return FALSE; 2289 } 2290 2291 if (htab->splt->size != 0) 2292 { 2293 if (! add_dynamic_entry (DT_PLTGOT, 0) 2294 || ! add_dynamic_entry (DT_PLTRELSZ, 0) 2295 || ! add_dynamic_entry (DT_PLTREL, DT_RELA) 2296 || ! add_dynamic_entry (DT_JMPREL, 0)) 2297 return FALSE; 2298 } 2299 2300 if (relocs) 2301 { 2302 if (! add_dynamic_entry (DT_RELA, 0) 2303 || ! add_dynamic_entry (DT_RELASZ, 0) 2304 || ! add_dynamic_entry (DT_RELAENT, 2305 sizeof (Elf32_External_Rela))) 2306 return FALSE; 2307 2308 /* If any dynamic relocs apply to a read-only section, 2309 then we need a DT_TEXTREL entry. */ 2310 if ((info->flags & DF_TEXTREL) == 0) 2311 elf_link_hash_traverse (&htab->root, readonly_dynrelocs, 2312 info); 2313 2314 if ((info->flags & DF_TEXTREL) != 0) 2315 { 2316 if (! add_dynamic_entry (DT_TEXTREL, 0)) 2317 return FALSE; 2318 } 2319 } 2320 } 2321 #undef add_dynamic_entry 2322 2323 /* Allocate .rofixup section. */ 2324 if (IS_FDPIC (output_bfd)) 2325 { 2326 struct weak_symbol_list *list_start = NULL, *list_end = NULL; 2327 int rgot_weak_count = 0; 2328 int r32_count = 0; 2329 int rgot_count = 0; 2330 /* Look for deleted sections. */ 2331 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 2332 { 2333 for (s = ibfd->sections; s != NULL; s = s->next) 2334 { 2335 if (s->reloc_count) 2336 { 2337 /* Count relocs that need .rofixup entires. */ 2338 Elf_Internal_Rela *internal_relocs, *end; 2339 internal_relocs = elf_section_data (s)->relocs; 2340 if (internal_relocs == NULL) 2341 internal_relocs = (_bfd_elf_link_read_relocs (ibfd, s, NULL, NULL, FALSE)); 2342 if (internal_relocs != NULL) 2343 { 2344 end = internal_relocs + s->reloc_count; 2345 while (internal_relocs < end) 2346 { 2347 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; 2348 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd); 2349 unsigned long r_symndx; 2350 struct elf_link_hash_entry *h; 2351 2352 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; 2353 sym_hashes = elf_sym_hashes (ibfd); 2354 r_symndx = ELF32_R_SYM (internal_relocs->r_info); 2355 h = NULL; 2356 if (r_symndx < symtab_hdr->sh_info) 2357 { 2358 } 2359 else 2360 { 2361 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 2362 while (h->root.type == bfd_link_hash_indirect 2363 || h->root.type == bfd_link_hash_warning) 2364 h = (struct elf_link_hash_entry *) h->root.u.i.link; 2365 } 2366 2367 /* Don't generate entries for weak symbols. */ 2368 if (!h || (h && h->root.type != bfd_link_hash_undefweak)) 2369 { 2370 if (!discarded_section (s) && !((bfd_get_section_flags (ibfd, s) & SEC_ALLOC) == 0)) 2371 { 2372 switch (ELF32_R_TYPE (internal_relocs->r_info)) 2373 { 2374 case R_LM32_32: 2375 r32_count++; 2376 break; 2377 case R_LM32_16_GOT: 2378 rgot_count++; 2379 break; 2380 } 2381 } 2382 } 2383 else 2384 { 2385 struct weak_symbol_list *current, *new_entry; 2386 /* Is this symbol already in the list? */ 2387 for (current = list_start; current; current = current->next) 2388 { 2389 if (!strcmp (current->name, h->root.root.string)) 2390 break; 2391 } 2392 if (!current && !discarded_section (s) && (bfd_get_section_flags (ibfd, s) & SEC_ALLOC)) 2393 { 2394 /* Will this have an entry in the GOT. */ 2395 if (ELF32_R_TYPE (internal_relocs->r_info) == R_LM32_16_GOT) 2396 { 2397 /* Create a new entry. */ 2398 new_entry = malloc (sizeof (struct weak_symbol_list)); 2399 if (!new_entry) 2400 return FALSE; 2401 new_entry->name = h->root.root.string; 2402 new_entry->next = NULL; 2403 /* Add to list */ 2404 if (list_start == NULL) 2405 { 2406 list_start = new_entry; 2407 list_end = new_entry; 2408 } 2409 else 2410 { 2411 list_end->next = new_entry; 2412 list_end = new_entry; 2413 } 2414 /* Increase count of undefined weak symbols in the got. */ 2415 rgot_weak_count++; 2416 } 2417 } 2418 } 2419 internal_relocs++; 2420 } 2421 } 2422 else 2423 return FALSE; 2424 } 2425 } 2426 } 2427 /* Free list. */ 2428 while (list_start) 2429 { 2430 list_end = list_start->next; 2431 free (list_start); 2432 list_start = list_end; 2433 } 2434 2435 /* Size sections. */ 2436 lm32fdpic_fixup32_section (info)->size = (r32_count + (htab->sgot->size / 4) - rgot_weak_count + 1) * 4; 2437 if (lm32fdpic_fixup32_section (info)->size == 0) 2438 lm32fdpic_fixup32_section (info)->flags |= SEC_EXCLUDE; 2439 else 2440 { 2441 lm32fdpic_fixup32_section (info)->contents = 2442 bfd_zalloc (dynobj, lm32fdpic_fixup32_section (info)->size); 2443 if (lm32fdpic_fixup32_section (info)->contents == NULL) 2444 return FALSE; 2445 } 2446 } 2447 2448 return TRUE; 2449 } 2450 2451 /* Create dynamic sections when linking against a dynamic object. */ 2452 2453 static bfd_boolean 2454 lm32_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) 2455 { 2456 struct elf_lm32_link_hash_table *htab; 2457 flagword flags, pltflags; 2458 asection *s; 2459 const struct elf_backend_data *bed = get_elf_backend_data (abfd); 2460 int ptralign = 2; /* 32bit */ 2461 2462 htab = lm32_elf_hash_table (info); 2463 if (htab == NULL) 2464 return FALSE; 2465 2466 /* Make sure we have a GOT - For the case where we have a dynamic object 2467 but none of the relocs in check_relocs */ 2468 if (! create_got_section (abfd, info)) 2469 return FALSE; 2470 if (IS_FDPIC (abfd) && (htab->sfixup32 == NULL)) 2471 { 2472 if (! create_rofixup_section (abfd, info)) 2473 return FALSE; 2474 } 2475 2476 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and 2477 .rel[a].bss sections. */ 2478 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY 2479 | SEC_LINKER_CREATED); 2480 2481 pltflags = flags; 2482 pltflags |= SEC_CODE; 2483 if (bed->plt_not_loaded) 2484 pltflags &= ~ (SEC_LOAD | SEC_HAS_CONTENTS); 2485 if (bed->plt_readonly) 2486 pltflags |= SEC_READONLY; 2487 2488 s = bfd_make_section_anyway_with_flags (abfd, ".plt", pltflags); 2489 htab->splt = s; 2490 if (s == NULL 2491 || ! bfd_set_section_alignment (abfd, s, bed->plt_alignment)) 2492 return FALSE; 2493 2494 if (bed->want_plt_sym) 2495 { 2496 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the 2497 .plt section. */ 2498 struct bfd_link_hash_entry *bh = NULL; 2499 struct elf_link_hash_entry *h; 2500 2501 if (! (_bfd_generic_link_add_one_symbol 2502 (info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s, 2503 (bfd_vma) 0, NULL, FALSE, 2504 get_elf_backend_data (abfd)->collect, &bh))) 2505 return FALSE; 2506 h = (struct elf_link_hash_entry *) bh; 2507 h->def_regular = 1; 2508 h->type = STT_OBJECT; 2509 htab->root.hplt = h; 2510 2511 if (info->shared 2512 && ! bfd_elf_link_record_dynamic_symbol (info, h)) 2513 return FALSE; 2514 } 2515 2516 s = bfd_make_section_anyway_with_flags (abfd, 2517 bed->default_use_rela_p 2518 ? ".rela.plt" : ".rel.plt", 2519 flags | SEC_READONLY); 2520 htab->srelplt = s; 2521 if (s == NULL 2522 || ! bfd_set_section_alignment (abfd, s, ptralign)) 2523 return FALSE; 2524 2525 if (htab->sgot == NULL 2526 && ! create_got_section (abfd, info)) 2527 return FALSE; 2528 2529 if (bed->want_dynbss) 2530 { 2531 /* The .dynbss section is a place to put symbols which are defined 2532 by dynamic objects, are referenced by regular objects, and are 2533 not functions. We must allocate space for them in the process 2534 image and use a R_*_COPY reloc to tell the dynamic linker to 2535 initialize them at run time. The linker script puts the .dynbss 2536 section into the .bss section of the final image. */ 2537 s = bfd_make_section_anyway_with_flags (abfd, ".dynbss", 2538 SEC_ALLOC | SEC_LINKER_CREATED); 2539 htab->sdynbss = s; 2540 if (s == NULL) 2541 return FALSE; 2542 /* The .rel[a].bss section holds copy relocs. This section is not 2543 normally needed. We need to create it here, though, so that the 2544 linker will map it to an output section. We can't just create it 2545 only if we need it, because we will not know whether we need it 2546 until we have seen all the input files, and the first time the 2547 main linker code calls BFD after examining all the input files 2548 (size_dynamic_sections) the input sections have already been 2549 mapped to the output sections. If the section turns out not to 2550 be needed, we can discard it later. We will never need this 2551 section when generating a shared object, since they do not use 2552 copy relocs. */ 2553 if (! info->shared) 2554 { 2555 s = bfd_make_section_anyway_with_flags (abfd, 2556 (bed->default_use_rela_p 2557 ? ".rela.bss" : ".rel.bss"), 2558 flags | SEC_READONLY); 2559 htab->srelbss = s; 2560 if (s == NULL 2561 || ! bfd_set_section_alignment (abfd, s, ptralign)) 2562 return FALSE; 2563 } 2564 } 2565 2566 return TRUE; 2567 } 2568 2569 /* Copy the extra info we tack onto an elf_link_hash_entry. */ 2570 2571 static void 2572 lm32_elf_copy_indirect_symbol (struct bfd_link_info *info, 2573 struct elf_link_hash_entry *dir, 2574 struct elf_link_hash_entry *ind) 2575 { 2576 struct elf_lm32_link_hash_entry * edir; 2577 struct elf_lm32_link_hash_entry * eind; 2578 2579 edir = (struct elf_lm32_link_hash_entry *) dir; 2580 eind = (struct elf_lm32_link_hash_entry *) ind; 2581 2582 if (eind->dyn_relocs != NULL) 2583 { 2584 if (edir->dyn_relocs != NULL) 2585 { 2586 struct elf_lm32_dyn_relocs **pp; 2587 struct elf_lm32_dyn_relocs *p; 2588 2589 /* Add reloc counts against the indirect sym to the direct sym 2590 list. Merge any entries against the same section. */ 2591 for (pp = &eind->dyn_relocs; (p = *pp) != NULL;) 2592 { 2593 struct elf_lm32_dyn_relocs *q; 2594 2595 for (q = edir->dyn_relocs; q != NULL; q = q->next) 2596 if (q->sec == p->sec) 2597 { 2598 q->pc_count += p->pc_count; 2599 q->count += p->count; 2600 *pp = p->next; 2601 break; 2602 } 2603 if (q == NULL) 2604 pp = &p->next; 2605 } 2606 *pp = edir->dyn_relocs; 2607 } 2608 2609 edir->dyn_relocs = eind->dyn_relocs; 2610 eind->dyn_relocs = NULL; 2611 } 2612 2613 _bfd_elf_link_hash_copy_indirect (info, dir, ind); 2614 } 2615 2616 static bfd_boolean 2617 lm32_elf_always_size_sections (bfd *output_bfd, struct bfd_link_info *info) 2618 { 2619 if (!info->relocatable) 2620 { 2621 if (!bfd_elf_stack_segment_size (output_bfd, info, 2622 "__stacksize", DEFAULT_STACK_SIZE)) 2623 return FALSE; 2624 2625 asection *sec = bfd_get_section_by_name (output_bfd, ".stack"); 2626 if (sec) 2627 sec->size = info->stacksize >= 0 ? info->stacksize : 0; 2628 } 2629 2630 return TRUE; 2631 } 2632 2633 static bfd_boolean 2634 lm32_elf_fdpic_copy_private_bfd_data (bfd *ibfd, bfd *obfd) 2635 { 2636 unsigned i; 2637 2638 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour 2639 || bfd_get_flavour (obfd) != bfd_target_elf_flavour) 2640 return TRUE; 2641 2642 if (! _bfd_elf_copy_private_bfd_data (ibfd, obfd)) 2643 return FALSE; 2644 2645 if (! elf_tdata (ibfd) || ! elf_tdata (ibfd)->phdr 2646 || ! elf_tdata (obfd) || ! elf_tdata (obfd)->phdr) 2647 return TRUE; 2648 2649 /* Copy the stack size. */ 2650 for (i = 0; i < elf_elfheader (ibfd)->e_phnum; i++) 2651 if (elf_tdata (ibfd)->phdr[i].p_type == PT_GNU_STACK) 2652 { 2653 Elf_Internal_Phdr *iphdr = &elf_tdata (ibfd)->phdr[i]; 2654 2655 for (i = 0; i < elf_elfheader (obfd)->e_phnum; i++) 2656 if (elf_tdata (obfd)->phdr[i].p_type == PT_GNU_STACK) 2657 { 2658 memcpy (&elf_tdata (obfd)->phdr[i], iphdr, sizeof (*iphdr)); 2659 2660 /* Rewrite the phdrs, since we're only called after they were first written. */ 2661 if (bfd_seek (obfd, (bfd_signed_vma) get_elf_backend_data (obfd) 2662 ->s->sizeof_ehdr, SEEK_SET) != 0 2663 || get_elf_backend_data (obfd)->s->write_out_phdrs (obfd, elf_tdata (obfd)->phdr, 2664 elf_elfheader (obfd)->e_phnum) != 0) 2665 return FALSE; 2666 break; 2667 } 2668 2669 break; 2670 } 2671 2672 return TRUE; 2673 } 2674 2675 2676 #define ELF_ARCH bfd_arch_lm32 2677 #define ELF_TARGET_ID LM32_ELF_DATA 2678 #define ELF_MACHINE_CODE EM_LATTICEMICO32 2679 #define ELF_MAXPAGESIZE 0x1000 2680 2681 #define TARGET_BIG_SYM lm32_elf32_vec 2682 #define TARGET_BIG_NAME "elf32-lm32" 2683 2684 #define bfd_elf32_bfd_reloc_type_lookup lm32_reloc_type_lookup 2685 #define bfd_elf32_bfd_reloc_name_lookup lm32_reloc_name_lookup 2686 #define elf_info_to_howto lm32_info_to_howto_rela 2687 #define elf_info_to_howto_rel 0 2688 #define elf_backend_rela_normal 1 2689 #define elf_backend_object_p lm32_elf_object_p 2690 #define elf_backend_final_write_processing lm32_elf_final_write_processing 2691 #define elf_backend_stack_align 8 2692 #define elf_backend_can_gc_sections 1 2693 #define elf_backend_can_refcount 1 2694 #define elf_backend_gc_mark_hook lm32_elf_gc_mark_hook 2695 #define elf_backend_gc_sweep_hook lm32_elf_gc_sweep_hook 2696 #define elf_backend_plt_readonly 1 2697 #define elf_backend_want_got_plt 1 2698 #define elf_backend_want_plt_sym 0 2699 #define elf_backend_got_header_size 12 2700 #define bfd_elf32_bfd_link_hash_table_create lm32_elf_link_hash_table_create 2701 #define elf_backend_check_relocs lm32_elf_check_relocs 2702 #define elf_backend_reloc_type_class lm32_elf_reloc_type_class 2703 #define elf_backend_copy_indirect_symbol lm32_elf_copy_indirect_symbol 2704 #define elf_backend_size_dynamic_sections lm32_elf_size_dynamic_sections 2705 #define elf_backend_omit_section_dynsym ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true) 2706 #define elf_backend_create_dynamic_sections lm32_elf_create_dynamic_sections 2707 #define elf_backend_finish_dynamic_sections lm32_elf_finish_dynamic_sections 2708 #define elf_backend_adjust_dynamic_symbol lm32_elf_adjust_dynamic_symbol 2709 #define elf_backend_finish_dynamic_symbol lm32_elf_finish_dynamic_symbol 2710 #define elf_backend_relocate_section lm32_elf_relocate_section 2711 2712 #include "elf32-target.h" 2713 2714 #undef ELF_MAXPAGESIZE 2715 #define ELF_MAXPAGESIZE 0x4000 2716 2717 2718 #undef TARGET_BIG_SYM 2719 #define TARGET_BIG_SYM lm32_elf32_fdpic_vec 2720 #undef TARGET_BIG_NAME 2721 #define TARGET_BIG_NAME "elf32-lm32fdpic" 2722 #undef elf32_bed 2723 #define elf32_bed elf32_lm32fdpic_bed 2724 2725 #undef elf_backend_always_size_sections 2726 #define elf_backend_always_size_sections lm32_elf_always_size_sections 2727 #undef bfd_elf32_bfd_copy_private_bfd_data 2728 #define bfd_elf32_bfd_copy_private_bfd_data lm32_elf_fdpic_copy_private_bfd_data 2729 2730 #include "elf32-target.h" 2731