1 /* Lattice Mico32-specific support for 32-bit ELF 2 Copyright (C) 2008-2016 Free Software Foundation, Inc. 3 Contributed by Jon Beniston <jon (at) 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 (bfd_link_relocatable (info)) 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, 949 bfd_link_pic (info), 950 h) 951 || (bfd_link_pic (info) 952 && (info->symbolic 953 || h->dynindx == -1 954 || h->forced_local) 955 && h->def_regular)) 956 { 957 /* This is actually a static link, or it is a 958 -Bsymbolic link and the symbol is defined 959 locally, or the symbol was forced to be local 960 because of a version file. We must initialize 961 this entry in the global offset table. Since the 962 offset must always be a multiple of 4, we use the 963 least significant bit to record whether we have 964 initialized it already. 965 966 When doing a dynamic link, we create a .rela.got 967 relocation entry to initialize the value. This 968 is done in the finish_dynamic_symbol routine. */ 969 if ((off & 1) != 0) 970 off &= ~1; 971 else 972 { 973 /* Write entry in GOT */ 974 bfd_put_32 (output_bfd, relocation, 975 sgot->contents + off); 976 /* Create entry in .rofixup pointing to GOT entry. */ 977 if (IS_FDPIC (output_bfd) && h->root.type != bfd_link_hash_undefweak) 978 { 979 _lm32fdpic_add_rofixup (output_bfd, 980 lm32fdpic_fixup32_section 981 (info), 982 sgot->output_section->vma 983 + sgot->output_offset 984 + off); 985 } 986 /* Mark GOT entry as having been written. */ 987 h->got.offset |= 1; 988 } 989 } 990 991 relocation = sgot->output_offset + off; 992 } 993 else 994 { 995 bfd_vma off; 996 bfd_byte *loc; 997 998 BFD_ASSERT (local_got_offsets != NULL 999 && local_got_offsets[r_symndx] != (bfd_vma) -1); 1000 1001 /* Get offset into GOT table. */ 1002 off = local_got_offsets[r_symndx]; 1003 1004 /* The offset must always be a multiple of 4. We use 1005 the least significant bit to record whether we have 1006 already processed this entry. */ 1007 if ((off & 1) != 0) 1008 off &= ~1; 1009 else 1010 { 1011 /* Write entry in GOT. */ 1012 bfd_put_32 (output_bfd, relocation, sgot->contents + off); 1013 /* Create entry in .rofixup pointing to GOT entry. */ 1014 if (IS_FDPIC (output_bfd)) 1015 { 1016 _lm32fdpic_add_rofixup (output_bfd, 1017 lm32fdpic_fixup32_section 1018 (info), 1019 sgot->output_section->vma 1020 + sgot->output_offset 1021 + off); 1022 } 1023 1024 if (bfd_link_pic (info)) 1025 { 1026 asection *srelgot; 1027 Elf_Internal_Rela outrel; 1028 1029 /* We need to generate a R_LM32_RELATIVE reloc 1030 for the dynamic linker. */ 1031 srelgot = bfd_get_linker_section (dynobj, 1032 ".rela.got"); 1033 BFD_ASSERT (srelgot != NULL); 1034 1035 outrel.r_offset = (sgot->output_section->vma 1036 + sgot->output_offset 1037 + off); 1038 outrel.r_info = ELF32_R_INFO (0, R_LM32_RELATIVE); 1039 outrel.r_addend = relocation; 1040 loc = srelgot->contents; 1041 loc += srelgot->reloc_count * sizeof (Elf32_External_Rela); 1042 bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc); 1043 ++srelgot->reloc_count; 1044 } 1045 1046 local_got_offsets[r_symndx] |= 1; 1047 } 1048 1049 1050 relocation = sgot->output_offset + off; 1051 } 1052 1053 /* Addend should be zero. */ 1054 if (rel->r_addend != 0) 1055 (*_bfd_error_handler) (_("internal error: addend should be zero for R_LM32_16_GOT")); 1056 1057 r = _bfd_final_link_relocate (howto, 1058 input_bfd, 1059 input_section, 1060 contents, 1061 rel->r_offset, 1062 relocation, 1063 rel->r_addend); 1064 break; 1065 1066 case R_LM32_GOTOFF_LO16: 1067 case R_LM32_GOTOFF_HI16: 1068 /* Relocation is offset from GOT. */ 1069 BFD_ASSERT (sgot != NULL); 1070 relocation -= sgot->output_section->vma; 1071 /* Account for sign-extension. */ 1072 if ((r_type == R_LM32_GOTOFF_HI16) 1073 && ((relocation + rel->r_addend) & 0x8000)) 1074 rel->r_addend += 0x10000; 1075 r = _bfd_final_link_relocate (howto, 1076 input_bfd, 1077 input_section, 1078 contents, 1079 rel->r_offset, 1080 relocation, 1081 rel->r_addend); 1082 break; 1083 1084 case R_LM32_32: 1085 if (IS_FDPIC (output_bfd)) 1086 { 1087 if ((!h) || (h && h->root.type != bfd_link_hash_undefweak)) 1088 { 1089 /* Only create .rofixup entries for relocs in loadable sections. */ 1090 if ((bfd_get_section_flags (output_bfd, input_section->output_section) 1091 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD)) 1092 1093 { 1094 /* Check address to be modified is writable. */ 1095 if (_lm32fdpic_osec_readonly_p (output_bfd, 1096 input_section 1097 ->output_section)) 1098 { 1099 info->callbacks->warning 1100 (info, 1101 _("cannot emit dynamic relocations in read-only section"), 1102 name, input_bfd, input_section, rel->r_offset); 1103 return FALSE; 1104 } 1105 /* Create entry in .rofixup section. */ 1106 _lm32fdpic_add_rofixup (output_bfd, 1107 lm32fdpic_fixup32_section (info), 1108 input_section->output_section->vma 1109 + input_section->output_offset 1110 + rel->r_offset); 1111 } 1112 } 1113 } 1114 /* Fall through. */ 1115 1116 default: 1117 r = _bfd_final_link_relocate (howto, 1118 input_bfd, 1119 input_section, 1120 contents, 1121 rel->r_offset, 1122 relocation, 1123 rel->r_addend); 1124 break; 1125 } 1126 } 1127 1128 if (r != bfd_reloc_ok) 1129 { 1130 const char *msg = NULL; 1131 arelent bfd_reloc; 1132 1133 lm32_info_to_howto_rela (input_bfd, &bfd_reloc, rel); 1134 howto = bfd_reloc.howto; 1135 1136 if (h != NULL) 1137 name = h->root.root.string; 1138 else 1139 { 1140 name = (bfd_elf_string_from_elf_section 1141 (input_bfd, symtab_hdr->sh_link, sym->st_name)); 1142 if (name == NULL || *name == '\0') 1143 name = bfd_section_name (input_bfd, sec); 1144 } 1145 1146 switch (r) 1147 { 1148 case bfd_reloc_overflow: 1149 if ((h != NULL) 1150 && (h->root.type == bfd_link_hash_undefweak)) 1151 break; 1152 (*info->callbacks->reloc_overflow) 1153 (info, (h ? &h->root : NULL), name, howto->name, 1154 (bfd_vma) 0, input_bfd, input_section, rel->r_offset); 1155 break; 1156 1157 case bfd_reloc_undefined: 1158 (*info->callbacks->undefined_symbol) 1159 (info, name, input_bfd, input_section, rel->r_offset, TRUE); 1160 break; 1161 1162 case bfd_reloc_outofrange: 1163 msg = _("internal error: out of range error"); 1164 goto common_error; 1165 1166 case bfd_reloc_notsupported: 1167 msg = _("internal error: unsupported relocation error"); 1168 goto common_error; 1169 1170 case bfd_reloc_dangerous: 1171 msg = _("internal error: dangerous error"); 1172 goto common_error; 1173 1174 default: 1175 msg = _("internal error: unknown error"); 1176 /* fall through */ 1177 1178 common_error: 1179 (*info->callbacks->warning) (info, msg, name, input_bfd, 1180 input_section, rel->r_offset); 1181 break; 1182 } 1183 } 1184 } 1185 1186 return TRUE; 1187 } 1188 1189 static asection * 1190 lm32_elf_gc_mark_hook (asection *sec, 1191 struct bfd_link_info *info, 1192 Elf_Internal_Rela *rel, 1193 struct elf_link_hash_entry *h, 1194 Elf_Internal_Sym *sym) 1195 { 1196 if (h != NULL) 1197 switch (ELF32_R_TYPE (rel->r_info)) 1198 { 1199 case R_LM32_GNU_VTINHERIT: 1200 case R_LM32_GNU_VTENTRY: 1201 return NULL; 1202 } 1203 1204 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 1205 } 1206 1207 static bfd_boolean 1208 lm32_elf_gc_sweep_hook (bfd *abfd, 1209 struct bfd_link_info *info ATTRIBUTE_UNUSED, 1210 asection *sec, 1211 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED) 1212 { 1213 /* Update the got entry reference counts for the section being removed. */ 1214 Elf_Internal_Shdr *symtab_hdr; 1215 struct elf_link_hash_entry **sym_hashes; 1216 bfd_signed_vma *local_got_refcounts; 1217 const Elf_Internal_Rela *rel, *relend; 1218 1219 elf_section_data (sec)->local_dynrel = NULL; 1220 1221 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 1222 sym_hashes = elf_sym_hashes (abfd); 1223 local_got_refcounts = elf_local_got_refcounts (abfd); 1224 1225 relend = relocs + sec->reloc_count; 1226 for (rel = relocs; rel < relend; rel++) 1227 { 1228 unsigned long r_symndx; 1229 struct elf_link_hash_entry *h = NULL; 1230 1231 r_symndx = ELF32_R_SYM (rel->r_info); 1232 if (r_symndx >= symtab_hdr->sh_info) 1233 { 1234 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 1235 while (h->root.type == bfd_link_hash_indirect 1236 || h->root.type == bfd_link_hash_warning) 1237 h = (struct elf_link_hash_entry *) h->root.u.i.link; 1238 } 1239 1240 switch (ELF32_R_TYPE (rel->r_info)) 1241 { 1242 case R_LM32_16_GOT: 1243 if (h != NULL) 1244 { 1245 if (h->got.refcount > 0) 1246 h->got.refcount--; 1247 } 1248 else 1249 { 1250 if (local_got_refcounts && local_got_refcounts[r_symndx] > 0) 1251 local_got_refcounts[r_symndx]--; 1252 } 1253 break; 1254 1255 default: 1256 break; 1257 } 1258 } 1259 return TRUE; 1260 } 1261 1262 /* Look through the relocs for a section during the first phase. */ 1263 1264 static bfd_boolean 1265 lm32_elf_check_relocs (bfd *abfd, 1266 struct bfd_link_info *info, 1267 asection *sec, 1268 const Elf_Internal_Rela *relocs) 1269 { 1270 Elf_Internal_Shdr *symtab_hdr; 1271 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; 1272 const Elf_Internal_Rela *rel; 1273 const Elf_Internal_Rela *rel_end; 1274 struct elf_lm32_link_hash_table *htab; 1275 bfd *dynobj; 1276 1277 if (bfd_link_relocatable (info)) 1278 return TRUE; 1279 1280 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 1281 sym_hashes = elf_sym_hashes (abfd); 1282 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym); 1283 if (!elf_bad_symtab (abfd)) 1284 sym_hashes_end -= symtab_hdr->sh_info; 1285 1286 htab = lm32_elf_hash_table (info); 1287 if (htab == NULL) 1288 return FALSE; 1289 1290 dynobj = htab->root.dynobj; 1291 1292 rel_end = relocs + sec->reloc_count; 1293 for (rel = relocs; rel < rel_end; rel++) 1294 { 1295 int r_type; 1296 struct elf_link_hash_entry *h; 1297 unsigned long r_symndx; 1298 1299 r_symndx = ELF32_R_SYM (rel->r_info); 1300 r_type = ELF32_R_TYPE (rel->r_info); 1301 if (r_symndx < symtab_hdr->sh_info) 1302 h = NULL; 1303 else 1304 { 1305 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 1306 while (h->root.type == bfd_link_hash_indirect 1307 || h->root.type == bfd_link_hash_warning) 1308 h = (struct elf_link_hash_entry *) h->root.u.i.link; 1309 1310 /* PR15323, ref flags aren't set for references in the same 1311 object. */ 1312 h->root.non_ir_ref = 1; 1313 } 1314 1315 /* Some relocs require a global offset table. */ 1316 if (htab->sgot == NULL) 1317 { 1318 switch (r_type) 1319 { 1320 case R_LM32_16_GOT: 1321 case R_LM32_GOTOFF_HI16: 1322 case R_LM32_GOTOFF_LO16: 1323 if (dynobj == NULL) 1324 htab->root.dynobj = dynobj = abfd; 1325 if (! create_got_section (dynobj, info)) 1326 return FALSE; 1327 break; 1328 } 1329 } 1330 1331 /* Some relocs require a rofixup table. */ 1332 if (IS_FDPIC (abfd)) 1333 { 1334 switch (r_type) 1335 { 1336 case R_LM32_32: 1337 /* FDPIC requires a GOT if there is a .rofixup section 1338 (Normal ELF doesn't). */ 1339 if (dynobj == NULL) 1340 htab->root.dynobj = dynobj = abfd; 1341 if (! create_got_section (dynobj, info)) 1342 return FALSE; 1343 /* Create .rofixup section */ 1344 if (htab->sfixup32 == NULL) 1345 { 1346 if (! create_rofixup_section (dynobj, info)) 1347 return FALSE; 1348 } 1349 break; 1350 case R_LM32_16_GOT: 1351 case R_LM32_GOTOFF_HI16: 1352 case R_LM32_GOTOFF_LO16: 1353 /* Create .rofixup section. */ 1354 if (htab->sfixup32 == NULL) 1355 { 1356 if (dynobj == NULL) 1357 htab->root.dynobj = dynobj = abfd; 1358 if (! create_rofixup_section (dynobj, info)) 1359 return FALSE; 1360 } 1361 break; 1362 } 1363 } 1364 1365 switch (r_type) 1366 { 1367 case R_LM32_16_GOT: 1368 if (h != NULL) 1369 h->got.refcount += 1; 1370 else 1371 { 1372 bfd_signed_vma *local_got_refcounts; 1373 1374 /* This is a global offset table entry for a local symbol. */ 1375 local_got_refcounts = elf_local_got_refcounts (abfd); 1376 if (local_got_refcounts == NULL) 1377 { 1378 bfd_size_type size; 1379 1380 size = symtab_hdr->sh_info; 1381 size *= sizeof (bfd_signed_vma); 1382 local_got_refcounts = bfd_zalloc (abfd, size); 1383 if (local_got_refcounts == NULL) 1384 return FALSE; 1385 elf_local_got_refcounts (abfd) = local_got_refcounts; 1386 } 1387 local_got_refcounts[r_symndx] += 1; 1388 } 1389 break; 1390 1391 /* This relocation describes the C++ object vtable hierarchy. 1392 Reconstruct it for later use during GC. */ 1393 case R_LM32_GNU_VTINHERIT: 1394 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 1395 return FALSE; 1396 break; 1397 1398 /* This relocation describes which C++ vtable entries are actually 1399 used. Record for later use during GC. */ 1400 case R_LM32_GNU_VTENTRY: 1401 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 1402 return FALSE; 1403 break; 1404 1405 } 1406 } 1407 1408 return TRUE; 1409 } 1410 1411 /* Finish up the dynamic sections. */ 1412 1413 static bfd_boolean 1414 lm32_elf_finish_dynamic_sections (bfd *output_bfd, 1415 struct bfd_link_info *info) 1416 { 1417 struct elf_lm32_link_hash_table *htab; 1418 bfd *dynobj; 1419 asection *sdyn; 1420 asection *sgot; 1421 1422 htab = lm32_elf_hash_table (info); 1423 if (htab == NULL) 1424 return FALSE; 1425 1426 dynobj = htab->root.dynobj; 1427 1428 sgot = htab->sgotplt; 1429 sdyn = bfd_get_linker_section (dynobj, ".dynamic"); 1430 1431 if (htab->root.dynamic_sections_created) 1432 { 1433 asection *splt; 1434 Elf32_External_Dyn *dyncon, *dynconend; 1435 1436 BFD_ASSERT (sgot != NULL && sdyn != NULL); 1437 1438 dyncon = (Elf32_External_Dyn *) sdyn->contents; 1439 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); 1440 1441 for (; dyncon < dynconend; dyncon++) 1442 { 1443 Elf_Internal_Dyn dyn; 1444 asection *s; 1445 1446 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); 1447 1448 switch (dyn.d_tag) 1449 { 1450 default: 1451 break; 1452 1453 case DT_PLTGOT: 1454 s = htab->sgotplt; 1455 goto get_vma; 1456 case DT_JMPREL: 1457 s = htab->srelplt; 1458 get_vma: 1459 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 1460 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 1461 break; 1462 1463 case DT_PLTRELSZ: 1464 s = htab->srelplt; 1465 dyn.d_un.d_val = s->size; 1466 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 1467 break; 1468 1469 case DT_RELASZ: 1470 /* My reading of the SVR4 ABI indicates that the 1471 procedure linkage table relocs (DT_JMPREL) should be 1472 included in the overall relocs (DT_RELA). This is 1473 what Solaris does. However, UnixWare can not handle 1474 that case. Therefore, we override the DT_RELASZ entry 1475 here to make it not include the JMPREL relocs. Since 1476 the linker script arranges for .rela.plt to follow all 1477 other relocation sections, we don't have to worry 1478 about changing the DT_RELA entry. */ 1479 if (htab->srelplt != NULL) 1480 { 1481 s = htab->srelplt; 1482 dyn.d_un.d_val -= s->size; 1483 } 1484 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 1485 break; 1486 } 1487 } 1488 1489 /* Fill in the first entry in the procedure linkage table. */ 1490 splt = htab->splt; 1491 if (splt && splt->size > 0) 1492 { 1493 if (bfd_link_pic (info)) 1494 { 1495 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD0, splt->contents); 1496 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD1, splt->contents + 4); 1497 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD2, splt->contents + 8); 1498 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD3, splt->contents + 12); 1499 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD4, splt->contents + 16); 1500 } 1501 else 1502 { 1503 unsigned long addr; 1504 /* addr = .got + 4 */ 1505 addr = sgot->output_section->vma + sgot->output_offset + 4; 1506 bfd_put_32 (output_bfd, 1507 PLT0_ENTRY_WORD0 | ((addr >> 16) & 0xffff), 1508 splt->contents); 1509 bfd_put_32 (output_bfd, 1510 PLT0_ENTRY_WORD1 | (addr & 0xffff), 1511 splt->contents + 4); 1512 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD2, splt->contents + 8); 1513 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD3, splt->contents + 12); 1514 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD4, splt->contents + 16); 1515 } 1516 1517 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 1518 PLT_ENTRY_SIZE; 1519 } 1520 } 1521 1522 /* Fill in the first three entries in the global offset table. */ 1523 if (sgot && sgot->size > 0) 1524 { 1525 if (sdyn == NULL) 1526 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); 1527 else 1528 bfd_put_32 (output_bfd, 1529 sdyn->output_section->vma + sdyn->output_offset, 1530 sgot->contents); 1531 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); 1532 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); 1533 1534 /* FIXME: This can be null if create_dynamic_sections wasn't called. */ 1535 if (elf_section_data (sgot->output_section) != NULL) 1536 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; 1537 } 1538 1539 if (lm32fdpic_fixup32_section (info)) 1540 { 1541 struct elf_link_hash_entry *hgot = elf_hash_table (info)->hgot; 1542 bfd_vma got_value = hgot->root.u.def.value 1543 + hgot->root.u.def.section->output_section->vma 1544 + hgot->root.u.def.section->output_offset; 1545 struct bfd_link_hash_entry *hend; 1546 1547 /* Last entry is pointer to GOT. */ 1548 _lm32fdpic_add_rofixup (output_bfd, lm32fdpic_fixup32_section (info), got_value); 1549 1550 /* Check we wrote enough entries. */ 1551 if (lm32fdpic_fixup32_section (info)->size 1552 != (lm32fdpic_fixup32_section (info)->reloc_count * 4)) 1553 { 1554 (*_bfd_error_handler) 1555 ("LINKER BUG: .rofixup section size mismatch: size/4 %d != relocs %d", 1556 lm32fdpic_fixup32_section (info)->size/4, 1557 lm32fdpic_fixup32_section (info)->reloc_count); 1558 return FALSE; 1559 } 1560 1561 hend = bfd_link_hash_lookup (info->hash, "__ROFIXUP_END__", 1562 FALSE, FALSE, TRUE); 1563 if (hend 1564 && (hend->type == bfd_link_hash_defined 1565 || hend->type == bfd_link_hash_defweak)) 1566 { 1567 bfd_vma value = 1568 lm32fdpic_fixup32_section (info)->output_section->vma 1569 + lm32fdpic_fixup32_section (info)->output_offset 1570 + lm32fdpic_fixup32_section (info)->size 1571 - hend->u.def.section->output_section->vma 1572 - hend->u.def.section->output_offset; 1573 BFD_ASSERT (hend->u.def.value == value); 1574 if (hend->u.def.value != value) 1575 { 1576 (*_bfd_error_handler) 1577 ("LINKER BUG: .rofixup section hend->u.def.value != value: %ld != %ld", hend->u.def.value, value); 1578 return FALSE; 1579 } 1580 } 1581 } 1582 1583 return TRUE; 1584 } 1585 1586 /* Finish up dynamic symbol handling. We set the contents of various 1587 dynamic sections here. */ 1588 1589 static bfd_boolean 1590 lm32_elf_finish_dynamic_symbol (bfd *output_bfd, 1591 struct bfd_link_info *info, 1592 struct elf_link_hash_entry *h, 1593 Elf_Internal_Sym *sym) 1594 { 1595 struct elf_lm32_link_hash_table *htab; 1596 bfd_byte *loc; 1597 1598 htab = lm32_elf_hash_table (info); 1599 if (htab == NULL) 1600 return FALSE; 1601 1602 if (h->plt.offset != (bfd_vma) -1) 1603 { 1604 asection *splt; 1605 asection *sgot; 1606 asection *srela; 1607 1608 bfd_vma plt_index; 1609 bfd_vma got_offset; 1610 Elf_Internal_Rela rela; 1611 1612 /* This symbol has an entry in the procedure linkage table. Set 1613 it up. */ 1614 BFD_ASSERT (h->dynindx != -1); 1615 1616 splt = htab->splt; 1617 sgot = htab->sgotplt; 1618 srela = htab->srelplt; 1619 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL); 1620 1621 /* Get the index in the procedure linkage table which 1622 corresponds to this symbol. This is the index of this symbol 1623 in all the symbols for which we are making plt entries. The 1624 first entry in the procedure linkage table is reserved. */ 1625 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; 1626 1627 /* Get the offset into the .got table of the entry that 1628 corresponds to this function. Each .got entry is 4 bytes. 1629 The first three are reserved. */ 1630 got_offset = (plt_index + 3) * 4; 1631 1632 /* Fill in the entry in the procedure linkage table. */ 1633 if (! bfd_link_pic (info)) 1634 { 1635 /* TODO */ 1636 } 1637 else 1638 { 1639 /* TODO */ 1640 } 1641 1642 /* Fill in the entry in the global offset table. */ 1643 bfd_put_32 (output_bfd, 1644 (splt->output_section->vma 1645 + splt->output_offset 1646 + h->plt.offset 1647 + 12), /* same offset */ 1648 sgot->contents + got_offset); 1649 1650 /* Fill in the entry in the .rela.plt section. */ 1651 rela.r_offset = (sgot->output_section->vma 1652 + sgot->output_offset 1653 + got_offset); 1654 rela.r_info = ELF32_R_INFO (h->dynindx, R_LM32_JMP_SLOT); 1655 rela.r_addend = 0; 1656 loc = srela->contents; 1657 loc += plt_index * sizeof (Elf32_External_Rela); 1658 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 1659 1660 if (!h->def_regular) 1661 { 1662 /* Mark the symbol as undefined, rather than as defined in 1663 the .plt section. Leave the value alone. */ 1664 sym->st_shndx = SHN_UNDEF; 1665 } 1666 1667 } 1668 1669 if (h->got.offset != (bfd_vma) -1) 1670 { 1671 asection *sgot; 1672 asection *srela; 1673 Elf_Internal_Rela rela; 1674 1675 /* This symbol has an entry in the global offset table. Set it 1676 up. */ 1677 sgot = htab->sgot; 1678 srela = htab->srelgot; 1679 BFD_ASSERT (sgot != NULL && srela != NULL); 1680 1681 rela.r_offset = (sgot->output_section->vma 1682 + sgot->output_offset 1683 + (h->got.offset &~ 1)); 1684 1685 /* If this is a -Bsymbolic link, and the symbol is defined 1686 locally, we just want to emit a RELATIVE reloc. Likewise if 1687 the symbol was forced to be local because of a version file. 1688 The entry in the global offset table will already have been 1689 initialized in the relocate_section function. */ 1690 if (bfd_link_pic (info) 1691 && (info->symbolic 1692 || h->dynindx == -1 1693 || h->forced_local) 1694 && h->def_regular) 1695 { 1696 rela.r_info = ELF32_R_INFO (0, R_LM32_RELATIVE); 1697 rela.r_addend = (h->root.u.def.value 1698 + h->root.u.def.section->output_section->vma 1699 + h->root.u.def.section->output_offset); 1700 } 1701 else 1702 { 1703 BFD_ASSERT ((h->got.offset & 1) == 0); 1704 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset); 1705 rela.r_info = ELF32_R_INFO (h->dynindx, R_LM32_GLOB_DAT); 1706 rela.r_addend = 0; 1707 } 1708 1709 loc = srela->contents; 1710 loc += srela->reloc_count * sizeof (Elf32_External_Rela); 1711 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 1712 ++srela->reloc_count; 1713 } 1714 1715 if (h->needs_copy) 1716 { 1717 asection *s; 1718 Elf_Internal_Rela rela; 1719 1720 /* This symbols needs a copy reloc. Set it up. */ 1721 BFD_ASSERT (h->dynindx != -1 1722 && (h->root.type == bfd_link_hash_defined 1723 || h->root.type == bfd_link_hash_defweak)); 1724 1725 s = bfd_get_linker_section (htab->root.dynobj, ".rela.bss"); 1726 BFD_ASSERT (s != NULL); 1727 1728 rela.r_offset = (h->root.u.def.value 1729 + h->root.u.def.section->output_section->vma 1730 + h->root.u.def.section->output_offset); 1731 rela.r_info = ELF32_R_INFO (h->dynindx, R_LM32_COPY); 1732 rela.r_addend = 0; 1733 loc = s->contents; 1734 loc += s->reloc_count * sizeof (Elf32_External_Rela); 1735 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 1736 ++s->reloc_count; 1737 } 1738 1739 /* Mark some specially defined symbols as absolute. */ 1740 if (h == htab->root.hdynamic || h == htab->root.hgot) 1741 sym->st_shndx = SHN_ABS; 1742 1743 return TRUE; 1744 } 1745 1746 static enum elf_reloc_type_class 1747 lm32_elf_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, 1748 const asection *rel_sec ATTRIBUTE_UNUSED, 1749 const Elf_Internal_Rela *rela) 1750 { 1751 switch ((int) ELF32_R_TYPE (rela->r_info)) 1752 { 1753 case R_LM32_RELATIVE: return reloc_class_relative; 1754 case R_LM32_JMP_SLOT: return reloc_class_plt; 1755 case R_LM32_COPY: return reloc_class_copy; 1756 default: return reloc_class_normal; 1757 } 1758 } 1759 1760 /* Adjust a symbol defined by a dynamic object and referenced by a 1761 regular object. The current definition is in some section of the 1762 dynamic object, but we're not including those sections. We have to 1763 change the definition to something the rest of the link can 1764 understand. */ 1765 1766 static bfd_boolean 1767 lm32_elf_adjust_dynamic_symbol (struct bfd_link_info *info, 1768 struct elf_link_hash_entry *h) 1769 { 1770 struct elf_lm32_link_hash_table *htab; 1771 struct elf_lm32_link_hash_entry *eh; 1772 struct elf_lm32_dyn_relocs *p; 1773 bfd *dynobj; 1774 asection *s; 1775 1776 dynobj = elf_hash_table (info)->dynobj; 1777 1778 /* Make sure we know what is going on here. */ 1779 BFD_ASSERT (dynobj != NULL 1780 && (h->needs_plt 1781 || h->u.weakdef != NULL 1782 || (h->def_dynamic 1783 && h->ref_regular 1784 && !h->def_regular))); 1785 1786 /* If this is a function, put it in the procedure linkage table. We 1787 will fill in the contents of the procedure linkage table later, 1788 when we know the address of the .got section. */ 1789 if (h->type == STT_FUNC 1790 || h->needs_plt) 1791 { 1792 if (! bfd_link_pic (info) 1793 && !h->def_dynamic 1794 && !h->ref_dynamic 1795 && h->root.type != bfd_link_hash_undefweak 1796 && h->root.type != bfd_link_hash_undefined) 1797 { 1798 /* This case can occur if we saw a PLT reloc in an input 1799 file, but the symbol was never referred to by a dynamic 1800 object. In such a case, we don't actually need to build 1801 a procedure linkage table, and we can just do a PCREL 1802 reloc instead. */ 1803 h->plt.offset = (bfd_vma) -1; 1804 h->needs_plt = 0; 1805 } 1806 1807 return TRUE; 1808 } 1809 else 1810 h->plt.offset = (bfd_vma) -1; 1811 1812 /* If this is a weak symbol, and there is a real definition, the 1813 processor independent code will have arranged for us to see the 1814 real definition first, and we can just use the same value. */ 1815 if (h->u.weakdef != NULL) 1816 { 1817 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined 1818 || h->u.weakdef->root.type == bfd_link_hash_defweak); 1819 h->root.u.def.section = h->u.weakdef->root.u.def.section; 1820 h->root.u.def.value = h->u.weakdef->root.u.def.value; 1821 return TRUE; 1822 } 1823 1824 /* This is a reference to a symbol defined by a dynamic object which 1825 is not a function. */ 1826 1827 /* If we are creating a shared library, we must presume that the 1828 only references to the symbol are via the global offset table. 1829 For such cases we need not do anything here; the relocations will 1830 be handled correctly by relocate_section. */ 1831 if (bfd_link_pic (info)) 1832 return TRUE; 1833 1834 /* If there are no references to this symbol that do not use the 1835 GOT, we don't need to generate a copy reloc. */ 1836 if (!h->non_got_ref) 1837 return TRUE; 1838 1839 /* If -z nocopyreloc was given, we won't generate them either. */ 1840 if (info->nocopyreloc) 1841 { 1842 h->non_got_ref = 0; 1843 return TRUE; 1844 } 1845 1846 eh = (struct elf_lm32_link_hash_entry *) h; 1847 for (p = eh->dyn_relocs; p != NULL; p = p->next) 1848 { 1849 s = p->sec->output_section; 1850 if (s != NULL && (s->flags & (SEC_READONLY | SEC_HAS_CONTENTS)) != 0) 1851 break; 1852 } 1853 1854 /* If we didn't find any dynamic relocs in sections which needs the 1855 copy reloc, then we'll be keeping the dynamic relocs and avoiding 1856 the copy reloc. */ 1857 if (p == NULL) 1858 { 1859 h->non_got_ref = 0; 1860 return TRUE; 1861 } 1862 1863 /* We must allocate the symbol in our .dynbss section, which will 1864 become part of the .bss section of the executable. There will be 1865 an entry for this symbol in the .dynsym section. The dynamic 1866 object will contain position independent code, so all references 1867 from the dynamic object to this symbol will go through the global 1868 offset table. The dynamic linker will use the .dynsym entry to 1869 determine the address it must put in the global offset table, so 1870 both the dynamic object and the regular object will refer to the 1871 same memory location for the variable. */ 1872 1873 htab = lm32_elf_hash_table (info); 1874 if (htab == NULL) 1875 return FALSE; 1876 1877 s = htab->sdynbss; 1878 BFD_ASSERT (s != NULL); 1879 1880 /* We must generate a R_LM32_COPY reloc to tell the dynamic linker 1881 to copy the initial value out of the dynamic object and into the 1882 runtime process image. We need to remember the offset into the 1883 .rela.bss section we are going to use. */ 1884 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) 1885 { 1886 asection *srel; 1887 1888 srel = htab->srelbss; 1889 BFD_ASSERT (srel != NULL); 1890 srel->size += sizeof (Elf32_External_Rela); 1891 h->needs_copy = 1; 1892 } 1893 1894 return _bfd_elf_adjust_dynamic_copy (info, h, s); 1895 } 1896 1897 /* Allocate space in .plt, .got and associated reloc sections for 1898 dynamic relocs. */ 1899 1900 static bfd_boolean 1901 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) 1902 { 1903 struct bfd_link_info *info; 1904 struct elf_lm32_link_hash_table *htab; 1905 struct elf_lm32_link_hash_entry *eh; 1906 struct elf_lm32_dyn_relocs *p; 1907 1908 if (h->root.type == bfd_link_hash_indirect) 1909 return TRUE; 1910 1911 info = (struct bfd_link_info *) inf; 1912 htab = lm32_elf_hash_table (info); 1913 if (htab == NULL) 1914 return FALSE; 1915 1916 eh = (struct elf_lm32_link_hash_entry *) h; 1917 1918 if (htab->root.dynamic_sections_created 1919 && h->plt.refcount > 0) 1920 { 1921 /* Make sure this symbol is output as a dynamic symbol. 1922 Undefined weak syms won't yet be marked as dynamic. */ 1923 if (h->dynindx == -1 1924 && !h->forced_local) 1925 { 1926 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1927 return FALSE; 1928 } 1929 1930 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), h)) 1931 { 1932 asection *s = htab->splt; 1933 1934 /* If this is the first .plt entry, make room for the special 1935 first entry. */ 1936 if (s->size == 0) 1937 s->size += PLT_ENTRY_SIZE; 1938 1939 h->plt.offset = s->size; 1940 1941 /* If this symbol is not defined in a regular file, and we are 1942 not generating a shared library, then set the symbol to this 1943 location in the .plt. This is required to make function 1944 pointers compare as equal between the normal executable and 1945 the shared library. */ 1946 if (! bfd_link_pic (info) 1947 && !h->def_regular) 1948 { 1949 h->root.u.def.section = s; 1950 h->root.u.def.value = h->plt.offset; 1951 } 1952 1953 /* Make room for this entry. */ 1954 s->size += PLT_ENTRY_SIZE; 1955 1956 /* We also need to make an entry in the .got.plt section, which 1957 will be placed in the .got section by the linker script. */ 1958 htab->sgotplt->size += 4; 1959 1960 /* We also need to make an entry in the .rel.plt section. */ 1961 htab->srelplt->size += sizeof (Elf32_External_Rela); 1962 } 1963 else 1964 { 1965 h->plt.offset = (bfd_vma) -1; 1966 h->needs_plt = 0; 1967 } 1968 } 1969 else 1970 { 1971 h->plt.offset = (bfd_vma) -1; 1972 h->needs_plt = 0; 1973 } 1974 1975 if (h->got.refcount > 0) 1976 { 1977 asection *s; 1978 bfd_boolean dyn; 1979 1980 /* Make sure this symbol is output as a dynamic symbol. 1981 Undefined weak syms won't yet be marked as dynamic. */ 1982 if (h->dynindx == -1 1983 && !h->forced_local) 1984 { 1985 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1986 return FALSE; 1987 } 1988 1989 s = htab->sgot; 1990 1991 h->got.offset = s->size; 1992 s->size += 4; 1993 dyn = htab->root.dynamic_sections_created; 1994 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h)) 1995 htab->srelgot->size += sizeof (Elf32_External_Rela); 1996 } 1997 else 1998 h->got.offset = (bfd_vma) -1; 1999 2000 if (eh->dyn_relocs == NULL) 2001 return TRUE; 2002 2003 /* In the shared -Bsymbolic case, discard space allocated for 2004 dynamic pc-relative relocs against symbols which turn out to be 2005 defined in regular objects. For the normal shared case, discard 2006 space for pc-relative relocs that have become local due to symbol 2007 visibility changes. */ 2008 2009 if (bfd_link_pic (info)) 2010 { 2011 if (h->def_regular 2012 && (h->forced_local 2013 || info->symbolic)) 2014 { 2015 struct elf_lm32_dyn_relocs **pp; 2016 2017 for (pp = &eh->dyn_relocs; (p = *pp) != NULL;) 2018 { 2019 p->count -= p->pc_count; 2020 p->pc_count = 0; 2021 if (p->count == 0) 2022 *pp = p->next; 2023 else 2024 pp = &p->next; 2025 } 2026 } 2027 2028 /* Also discard relocs on undefined weak syms with non-default 2029 visibility. */ 2030 if (eh->dyn_relocs != NULL 2031 && h->root.type == bfd_link_hash_undefweak) 2032 { 2033 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) 2034 eh->dyn_relocs = NULL; 2035 2036 /* Make sure undefined weak symbols are output as a dynamic 2037 symbol in PIEs. */ 2038 else if (h->dynindx == -1 2039 && !h->forced_local) 2040 { 2041 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 2042 return FALSE; 2043 } 2044 } 2045 } 2046 else 2047 { 2048 /* For the non-shared case, discard space for relocs against 2049 symbols which turn out to need copy relocs or are not 2050 dynamic. */ 2051 2052 if (!h->non_got_ref 2053 && ((h->def_dynamic 2054 && !h->def_regular) 2055 || (htab->root.dynamic_sections_created 2056 && (h->root.type == bfd_link_hash_undefweak 2057 || h->root.type == bfd_link_hash_undefined)))) 2058 { 2059 /* Make sure this symbol is output as a dynamic symbol. 2060 Undefined weak syms won't yet be marked as dynamic. */ 2061 if (h->dynindx == -1 2062 && !h->forced_local) 2063 { 2064 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 2065 return FALSE; 2066 } 2067 2068 /* If that succeeded, we know we'll be keeping all the 2069 relocs. */ 2070 if (h->dynindx != -1) 2071 goto keep; 2072 } 2073 2074 eh->dyn_relocs = NULL; 2075 2076 keep: ; 2077 } 2078 2079 /* Finally, allocate space. */ 2080 for (p = eh->dyn_relocs; p != NULL; p = p->next) 2081 { 2082 asection *sreloc = elf_section_data (p->sec)->sreloc; 2083 sreloc->size += p->count * sizeof (Elf32_External_Rela); 2084 } 2085 2086 return TRUE; 2087 } 2088 2089 /* Find any dynamic relocs that apply to read-only sections. */ 2090 2091 static bfd_boolean 2092 readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf) 2093 { 2094 struct elf_lm32_link_hash_entry *eh; 2095 struct elf_lm32_dyn_relocs *p; 2096 2097 eh = (struct elf_lm32_link_hash_entry *) h; 2098 for (p = eh->dyn_relocs; p != NULL; p = p->next) 2099 { 2100 asection *s = p->sec->output_section; 2101 2102 if (s != NULL && (s->flags & SEC_READONLY) != 0) 2103 { 2104 struct bfd_link_info *info = (struct bfd_link_info *) inf; 2105 2106 info->flags |= DF_TEXTREL; 2107 2108 /* Not an error, just cut short the traversal. */ 2109 return FALSE; 2110 } 2111 } 2112 return TRUE; 2113 } 2114 2115 /* Set the sizes of the dynamic sections. */ 2116 2117 static bfd_boolean 2118 lm32_elf_size_dynamic_sections (bfd *output_bfd, 2119 struct bfd_link_info *info) 2120 { 2121 struct elf_lm32_link_hash_table *htab; 2122 bfd *dynobj; 2123 asection *s; 2124 bfd_boolean relocs; 2125 bfd *ibfd; 2126 2127 htab = lm32_elf_hash_table (info); 2128 if (htab == NULL) 2129 return FALSE; 2130 2131 dynobj = htab->root.dynobj; 2132 BFD_ASSERT (dynobj != NULL); 2133 2134 if (htab->root.dynamic_sections_created) 2135 { 2136 /* Set the contents of the .interp section to the interpreter. */ 2137 if (bfd_link_executable (info) && !info->nointerp) 2138 { 2139 s = bfd_get_linker_section (dynobj, ".interp"); 2140 BFD_ASSERT (s != NULL); 2141 s->size = sizeof ELF_DYNAMIC_INTERPRETER; 2142 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; 2143 } 2144 } 2145 2146 /* Set up .got offsets for local syms, and space for local dynamic 2147 relocs. */ 2148 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 2149 { 2150 bfd_signed_vma *local_got; 2151 bfd_signed_vma *end_local_got; 2152 bfd_size_type locsymcount; 2153 Elf_Internal_Shdr *symtab_hdr; 2154 asection *srel; 2155 2156 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) 2157 continue; 2158 2159 for (s = ibfd->sections; s != NULL; s = s->next) 2160 { 2161 struct elf_lm32_dyn_relocs *p; 2162 2163 for (p = ((struct elf_lm32_dyn_relocs *) 2164 elf_section_data (s)->local_dynrel); 2165 p != NULL; 2166 p = p->next) 2167 { 2168 if (! bfd_is_abs_section (p->sec) 2169 && bfd_is_abs_section (p->sec->output_section)) 2170 { 2171 /* Input section has been discarded, either because 2172 it is a copy of a linkonce section or due to 2173 linker script /DISCARD/, so we'll be discarding 2174 the relocs too. */ 2175 } 2176 else if (p->count != 0) 2177 { 2178 srel = elf_section_data (p->sec)->sreloc; 2179 srel->size += p->count * sizeof (Elf32_External_Rela); 2180 if ((p->sec->output_section->flags & SEC_READONLY) != 0) 2181 info->flags |= DF_TEXTREL; 2182 } 2183 } 2184 } 2185 2186 local_got = elf_local_got_refcounts (ibfd); 2187 if (!local_got) 2188 continue; 2189 2190 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; 2191 locsymcount = symtab_hdr->sh_info; 2192 end_local_got = local_got + locsymcount; 2193 s = htab->sgot; 2194 srel = htab->srelgot; 2195 for (; local_got < end_local_got; ++local_got) 2196 { 2197 if (*local_got > 0) 2198 { 2199 *local_got = s->size; 2200 s->size += 4; 2201 if (bfd_link_pic (info)) 2202 srel->size += sizeof (Elf32_External_Rela); 2203 } 2204 else 2205 *local_got = (bfd_vma) -1; 2206 } 2207 } 2208 2209 /* Allocate global sym .plt and .got entries, and space for global 2210 sym dynamic relocs. */ 2211 elf_link_hash_traverse (&htab->root, allocate_dynrelocs, info); 2212 2213 /* We now have determined the sizes of the various dynamic sections. 2214 Allocate memory for them. */ 2215 relocs = FALSE; 2216 for (s = dynobj->sections; s != NULL; s = s->next) 2217 { 2218 if ((s->flags & SEC_LINKER_CREATED) == 0) 2219 continue; 2220 2221 if (s == htab->splt 2222 || s == htab->sgot 2223 || s == htab->sgotplt 2224 || s == htab->sdynbss) 2225 { 2226 /* Strip this section if we don't need it; see the 2227 comment below. */ 2228 } 2229 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) 2230 { 2231 if (s->size != 0 && s != htab->srelplt) 2232 relocs = TRUE; 2233 2234 /* We use the reloc_count field as a counter if we need 2235 to copy relocs into the output file. */ 2236 s->reloc_count = 0; 2237 } 2238 else 2239 /* It's not one of our sections, so don't allocate space. */ 2240 continue; 2241 2242 if (s->size == 0) 2243 { 2244 /* If we don't need this section, strip it from the 2245 output file. This is mostly to handle .rela.bss and 2246 .rela.plt. We must create both sections in 2247 create_dynamic_sections, because they must be created 2248 before the linker maps input sections to output 2249 sections. The linker does that before 2250 adjust_dynamic_symbol is called, and it is that 2251 function which decides whether anything needs to go 2252 into these sections. */ 2253 s->flags |= SEC_EXCLUDE; 2254 continue; 2255 } 2256 2257 if ((s->flags & SEC_HAS_CONTENTS) == 0) 2258 continue; 2259 2260 /* Allocate memory for the section contents. We use bfd_zalloc 2261 here in case unused entries are not reclaimed before the 2262 section's contents are written out. This should not happen, 2263 but this way if it does, we get a R_LM32_NONE reloc instead 2264 of garbage. */ 2265 s->contents = bfd_zalloc (dynobj, s->size); 2266 if (s->contents == NULL) 2267 return FALSE; 2268 } 2269 2270 if (htab->root.dynamic_sections_created) 2271 { 2272 /* Add some entries to the .dynamic section. We fill in the 2273 values later, in lm32_elf_finish_dynamic_sections, but we 2274 must add the entries now so that we get the correct size for 2275 the .dynamic section. The DT_DEBUG entry is filled in by the 2276 dynamic linker and used by the debugger. */ 2277 #define add_dynamic_entry(TAG, VAL) \ 2278 _bfd_elf_add_dynamic_entry (info, TAG, VAL) 2279 2280 if (bfd_link_executable (info)) 2281 { 2282 if (! add_dynamic_entry (DT_DEBUG, 0)) 2283 return FALSE; 2284 } 2285 2286 if (htab->splt->size != 0) 2287 { 2288 if (! add_dynamic_entry (DT_PLTGOT, 0) 2289 || ! add_dynamic_entry (DT_PLTRELSZ, 0) 2290 || ! add_dynamic_entry (DT_PLTREL, DT_RELA) 2291 || ! add_dynamic_entry (DT_JMPREL, 0)) 2292 return FALSE; 2293 } 2294 2295 if (relocs) 2296 { 2297 if (! add_dynamic_entry (DT_RELA, 0) 2298 || ! add_dynamic_entry (DT_RELASZ, 0) 2299 || ! add_dynamic_entry (DT_RELAENT, 2300 sizeof (Elf32_External_Rela))) 2301 return FALSE; 2302 2303 /* If any dynamic relocs apply to a read-only section, 2304 then we need a DT_TEXTREL entry. */ 2305 if ((info->flags & DF_TEXTREL) == 0) 2306 elf_link_hash_traverse (&htab->root, readonly_dynrelocs, 2307 info); 2308 2309 if ((info->flags & DF_TEXTREL) != 0) 2310 { 2311 if (! add_dynamic_entry (DT_TEXTREL, 0)) 2312 return FALSE; 2313 } 2314 } 2315 } 2316 #undef add_dynamic_entry 2317 2318 /* Allocate .rofixup section. */ 2319 if (IS_FDPIC (output_bfd)) 2320 { 2321 struct weak_symbol_list *list_start = NULL, *list_end = NULL; 2322 int rgot_weak_count = 0; 2323 int r32_count = 0; 2324 int rgot_count = 0; 2325 /* Look for deleted sections. */ 2326 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 2327 { 2328 for (s = ibfd->sections; s != NULL; s = s->next) 2329 { 2330 if (s->reloc_count) 2331 { 2332 /* Count relocs that need .rofixup entires. */ 2333 Elf_Internal_Rela *internal_relocs, *end; 2334 internal_relocs = elf_section_data (s)->relocs; 2335 if (internal_relocs == NULL) 2336 internal_relocs = (_bfd_elf_link_read_relocs (ibfd, s, NULL, NULL, FALSE)); 2337 if (internal_relocs != NULL) 2338 { 2339 end = internal_relocs + s->reloc_count; 2340 while (internal_relocs < end) 2341 { 2342 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; 2343 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd); 2344 unsigned long r_symndx; 2345 struct elf_link_hash_entry *h; 2346 2347 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; 2348 sym_hashes = elf_sym_hashes (ibfd); 2349 r_symndx = ELF32_R_SYM (internal_relocs->r_info); 2350 h = NULL; 2351 if (r_symndx < symtab_hdr->sh_info) 2352 { 2353 } 2354 else 2355 { 2356 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 2357 while (h->root.type == bfd_link_hash_indirect 2358 || h->root.type == bfd_link_hash_warning) 2359 h = (struct elf_link_hash_entry *) h->root.u.i.link; 2360 } 2361 2362 /* Don't generate entries for weak symbols. */ 2363 if (!h || (h && h->root.type != bfd_link_hash_undefweak)) 2364 { 2365 if (!discarded_section (s) && !((bfd_get_section_flags (ibfd, s) & SEC_ALLOC) == 0)) 2366 { 2367 switch (ELF32_R_TYPE (internal_relocs->r_info)) 2368 { 2369 case R_LM32_32: 2370 r32_count++; 2371 break; 2372 case R_LM32_16_GOT: 2373 rgot_count++; 2374 break; 2375 } 2376 } 2377 } 2378 else 2379 { 2380 struct weak_symbol_list *current, *new_entry; 2381 /* Is this symbol already in the list? */ 2382 for (current = list_start; current; current = current->next) 2383 { 2384 if (!strcmp (current->name, h->root.root.string)) 2385 break; 2386 } 2387 if (!current && !discarded_section (s) && (bfd_get_section_flags (ibfd, s) & SEC_ALLOC)) 2388 { 2389 /* Will this have an entry in the GOT. */ 2390 if (ELF32_R_TYPE (internal_relocs->r_info) == R_LM32_16_GOT) 2391 { 2392 /* Create a new entry. */ 2393 new_entry = malloc (sizeof (struct weak_symbol_list)); 2394 if (!new_entry) 2395 return FALSE; 2396 new_entry->name = h->root.root.string; 2397 new_entry->next = NULL; 2398 /* Add to list */ 2399 if (list_start == NULL) 2400 { 2401 list_start = new_entry; 2402 list_end = new_entry; 2403 } 2404 else 2405 { 2406 list_end->next = new_entry; 2407 list_end = new_entry; 2408 } 2409 /* Increase count of undefined weak symbols in the got. */ 2410 rgot_weak_count++; 2411 } 2412 } 2413 } 2414 internal_relocs++; 2415 } 2416 } 2417 else 2418 return FALSE; 2419 } 2420 } 2421 } 2422 /* Free list. */ 2423 while (list_start) 2424 { 2425 list_end = list_start->next; 2426 free (list_start); 2427 list_start = list_end; 2428 } 2429 2430 /* Size sections. */ 2431 lm32fdpic_fixup32_section (info)->size = (r32_count + (htab->sgot->size / 4) - rgot_weak_count + 1) * 4; 2432 if (lm32fdpic_fixup32_section (info)->size == 0) 2433 lm32fdpic_fixup32_section (info)->flags |= SEC_EXCLUDE; 2434 else 2435 { 2436 lm32fdpic_fixup32_section (info)->contents = 2437 bfd_zalloc (dynobj, lm32fdpic_fixup32_section (info)->size); 2438 if (lm32fdpic_fixup32_section (info)->contents == NULL) 2439 return FALSE; 2440 } 2441 } 2442 2443 return TRUE; 2444 } 2445 2446 /* Create dynamic sections when linking against a dynamic object. */ 2447 2448 static bfd_boolean 2449 lm32_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) 2450 { 2451 struct elf_lm32_link_hash_table *htab; 2452 flagword flags, pltflags; 2453 asection *s; 2454 const struct elf_backend_data *bed = get_elf_backend_data (abfd); 2455 int ptralign = 2; /* 32bit */ 2456 2457 htab = lm32_elf_hash_table (info); 2458 if (htab == NULL) 2459 return FALSE; 2460 2461 /* Make sure we have a GOT - For the case where we have a dynamic object 2462 but none of the relocs in check_relocs */ 2463 if (! create_got_section (abfd, info)) 2464 return FALSE; 2465 if (IS_FDPIC (abfd) && (htab->sfixup32 == NULL)) 2466 { 2467 if (! create_rofixup_section (abfd, info)) 2468 return FALSE; 2469 } 2470 2471 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and 2472 .rel[a].bss sections. */ 2473 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY 2474 | SEC_LINKER_CREATED); 2475 2476 pltflags = flags; 2477 pltflags |= SEC_CODE; 2478 if (bed->plt_not_loaded) 2479 pltflags &= ~ (SEC_LOAD | SEC_HAS_CONTENTS); 2480 if (bed->plt_readonly) 2481 pltflags |= SEC_READONLY; 2482 2483 s = bfd_make_section_anyway_with_flags (abfd, ".plt", pltflags); 2484 htab->splt = s; 2485 if (s == NULL 2486 || ! bfd_set_section_alignment (abfd, s, bed->plt_alignment)) 2487 return FALSE; 2488 2489 if (bed->want_plt_sym) 2490 { 2491 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the 2492 .plt section. */ 2493 struct bfd_link_hash_entry *bh = NULL; 2494 struct elf_link_hash_entry *h; 2495 2496 if (! (_bfd_generic_link_add_one_symbol 2497 (info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s, 2498 (bfd_vma) 0, NULL, FALSE, 2499 get_elf_backend_data (abfd)->collect, &bh))) 2500 return FALSE; 2501 h = (struct elf_link_hash_entry *) bh; 2502 h->def_regular = 1; 2503 h->type = STT_OBJECT; 2504 htab->root.hplt = h; 2505 2506 if (bfd_link_pic (info) 2507 && ! bfd_elf_link_record_dynamic_symbol (info, h)) 2508 return FALSE; 2509 } 2510 2511 s = bfd_make_section_anyway_with_flags (abfd, 2512 bed->default_use_rela_p 2513 ? ".rela.plt" : ".rel.plt", 2514 flags | SEC_READONLY); 2515 htab->srelplt = s; 2516 if (s == NULL 2517 || ! bfd_set_section_alignment (abfd, s, ptralign)) 2518 return FALSE; 2519 2520 if (htab->sgot == NULL 2521 && ! create_got_section (abfd, info)) 2522 return FALSE; 2523 2524 if (bed->want_dynbss) 2525 { 2526 /* The .dynbss section is a place to put symbols which are defined 2527 by dynamic objects, are referenced by regular objects, and are 2528 not functions. We must allocate space for them in the process 2529 image and use a R_*_COPY reloc to tell the dynamic linker to 2530 initialize them at run time. The linker script puts the .dynbss 2531 section into the .bss section of the final image. */ 2532 s = bfd_make_section_anyway_with_flags (abfd, ".dynbss", 2533 SEC_ALLOC | SEC_LINKER_CREATED); 2534 htab->sdynbss = s; 2535 if (s == NULL) 2536 return FALSE; 2537 /* The .rel[a].bss section holds copy relocs. This section is not 2538 normally needed. We need to create it here, though, so that the 2539 linker will map it to an output section. We can't just create it 2540 only if we need it, because we will not know whether we need it 2541 until we have seen all the input files, and the first time the 2542 main linker code calls BFD after examining all the input files 2543 (size_dynamic_sections) the input sections have already been 2544 mapped to the output sections. If the section turns out not to 2545 be needed, we can discard it later. We will never need this 2546 section when generating a shared object, since they do not use 2547 copy relocs. */ 2548 if (! bfd_link_pic (info)) 2549 { 2550 s = bfd_make_section_anyway_with_flags (abfd, 2551 (bed->default_use_rela_p 2552 ? ".rela.bss" : ".rel.bss"), 2553 flags | SEC_READONLY); 2554 htab->srelbss = s; 2555 if (s == NULL 2556 || ! bfd_set_section_alignment (abfd, s, ptralign)) 2557 return FALSE; 2558 } 2559 } 2560 2561 return TRUE; 2562 } 2563 2564 /* Copy the extra info we tack onto an elf_link_hash_entry. */ 2565 2566 static void 2567 lm32_elf_copy_indirect_symbol (struct bfd_link_info *info, 2568 struct elf_link_hash_entry *dir, 2569 struct elf_link_hash_entry *ind) 2570 { 2571 struct elf_lm32_link_hash_entry * edir; 2572 struct elf_lm32_link_hash_entry * eind; 2573 2574 edir = (struct elf_lm32_link_hash_entry *) dir; 2575 eind = (struct elf_lm32_link_hash_entry *) ind; 2576 2577 if (eind->dyn_relocs != NULL) 2578 { 2579 if (edir->dyn_relocs != NULL) 2580 { 2581 struct elf_lm32_dyn_relocs **pp; 2582 struct elf_lm32_dyn_relocs *p; 2583 2584 /* Add reloc counts against the indirect sym to the direct sym 2585 list. Merge any entries against the same section. */ 2586 for (pp = &eind->dyn_relocs; (p = *pp) != NULL;) 2587 { 2588 struct elf_lm32_dyn_relocs *q; 2589 2590 for (q = edir->dyn_relocs; q != NULL; q = q->next) 2591 if (q->sec == p->sec) 2592 { 2593 q->pc_count += p->pc_count; 2594 q->count += p->count; 2595 *pp = p->next; 2596 break; 2597 } 2598 if (q == NULL) 2599 pp = &p->next; 2600 } 2601 *pp = edir->dyn_relocs; 2602 } 2603 2604 edir->dyn_relocs = eind->dyn_relocs; 2605 eind->dyn_relocs = NULL; 2606 } 2607 2608 _bfd_elf_link_hash_copy_indirect (info, dir, ind); 2609 } 2610 2611 static bfd_boolean 2612 lm32_elf_always_size_sections (bfd *output_bfd, struct bfd_link_info *info) 2613 { 2614 if (!bfd_link_relocatable (info)) 2615 { 2616 if (!bfd_elf_stack_segment_size (output_bfd, info, 2617 "__stacksize", DEFAULT_STACK_SIZE)) 2618 return FALSE; 2619 2620 asection *sec = bfd_get_section_by_name (output_bfd, ".stack"); 2621 if (sec) 2622 sec->size = info->stacksize >= 0 ? info->stacksize : 0; 2623 } 2624 2625 return TRUE; 2626 } 2627 2628 static bfd_boolean 2629 lm32_elf_fdpic_copy_private_bfd_data (bfd *ibfd, bfd *obfd) 2630 { 2631 unsigned i; 2632 2633 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour 2634 || bfd_get_flavour (obfd) != bfd_target_elf_flavour) 2635 return TRUE; 2636 2637 if (! _bfd_elf_copy_private_bfd_data (ibfd, obfd)) 2638 return FALSE; 2639 2640 if (! elf_tdata (ibfd) || ! elf_tdata (ibfd)->phdr 2641 || ! elf_tdata (obfd) || ! elf_tdata (obfd)->phdr) 2642 return TRUE; 2643 2644 /* Copy the stack size. */ 2645 for (i = 0; i < elf_elfheader (ibfd)->e_phnum; i++) 2646 if (elf_tdata (ibfd)->phdr[i].p_type == PT_GNU_STACK) 2647 { 2648 Elf_Internal_Phdr *iphdr = &elf_tdata (ibfd)->phdr[i]; 2649 2650 for (i = 0; i < elf_elfheader (obfd)->e_phnum; i++) 2651 if (elf_tdata (obfd)->phdr[i].p_type == PT_GNU_STACK) 2652 { 2653 memcpy (&elf_tdata (obfd)->phdr[i], iphdr, sizeof (*iphdr)); 2654 2655 /* Rewrite the phdrs, since we're only called after they were first written. */ 2656 if (bfd_seek (obfd, (bfd_signed_vma) get_elf_backend_data (obfd) 2657 ->s->sizeof_ehdr, SEEK_SET) != 0 2658 || get_elf_backend_data (obfd)->s->write_out_phdrs (obfd, elf_tdata (obfd)->phdr, 2659 elf_elfheader (obfd)->e_phnum) != 0) 2660 return FALSE; 2661 break; 2662 } 2663 2664 break; 2665 } 2666 2667 return TRUE; 2668 } 2669 2670 2671 #define ELF_ARCH bfd_arch_lm32 2672 #define ELF_TARGET_ID LM32_ELF_DATA 2673 #define ELF_MACHINE_CODE EM_LATTICEMICO32 2674 #define ELF_MAXPAGESIZE 0x1000 2675 2676 #define TARGET_BIG_SYM lm32_elf32_vec 2677 #define TARGET_BIG_NAME "elf32-lm32" 2678 2679 #define bfd_elf32_bfd_reloc_type_lookup lm32_reloc_type_lookup 2680 #define bfd_elf32_bfd_reloc_name_lookup lm32_reloc_name_lookup 2681 #define elf_info_to_howto lm32_info_to_howto_rela 2682 #define elf_info_to_howto_rel 0 2683 #define elf_backend_rela_normal 1 2684 #define elf_backend_object_p lm32_elf_object_p 2685 #define elf_backend_final_write_processing lm32_elf_final_write_processing 2686 #define elf_backend_stack_align 8 2687 #define elf_backend_can_gc_sections 1 2688 #define elf_backend_can_refcount 1 2689 #define elf_backend_gc_mark_hook lm32_elf_gc_mark_hook 2690 #define elf_backend_gc_sweep_hook lm32_elf_gc_sweep_hook 2691 #define elf_backend_plt_readonly 1 2692 #define elf_backend_want_got_plt 1 2693 #define elf_backend_want_plt_sym 0 2694 #define elf_backend_got_header_size 12 2695 #define bfd_elf32_bfd_link_hash_table_create lm32_elf_link_hash_table_create 2696 #define elf_backend_check_relocs lm32_elf_check_relocs 2697 #define elf_backend_reloc_type_class lm32_elf_reloc_type_class 2698 #define elf_backend_copy_indirect_symbol lm32_elf_copy_indirect_symbol 2699 #define elf_backend_size_dynamic_sections lm32_elf_size_dynamic_sections 2700 #define elf_backend_omit_section_dynsym ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true) 2701 #define elf_backend_create_dynamic_sections lm32_elf_create_dynamic_sections 2702 #define elf_backend_finish_dynamic_sections lm32_elf_finish_dynamic_sections 2703 #define elf_backend_adjust_dynamic_symbol lm32_elf_adjust_dynamic_symbol 2704 #define elf_backend_finish_dynamic_symbol lm32_elf_finish_dynamic_symbol 2705 #define elf_backend_relocate_section lm32_elf_relocate_section 2706 2707 #include "elf32-target.h" 2708 2709 #undef ELF_MAXPAGESIZE 2710 #define ELF_MAXPAGESIZE 0x4000 2711 2712 2713 #undef TARGET_BIG_SYM 2714 #define TARGET_BIG_SYM lm32_elf32_fdpic_vec 2715 #undef TARGET_BIG_NAME 2716 #define TARGET_BIG_NAME "elf32-lm32fdpic" 2717 #undef elf32_bed 2718 #define elf32_bed elf32_lm32fdpic_bed 2719 2720 #undef elf_backend_always_size_sections 2721 #define elf_backend_always_size_sections lm32_elf_always_size_sections 2722 #undef bfd_elf32_bfd_copy_private_bfd_data 2723 #define bfd_elf32_bfd_copy_private_bfd_data lm32_elf_fdpic_copy_private_bfd_data 2724 2725 #include "elf32-target.h" 2726
