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