1 /* Lattice Mico32-specific support for 32-bit ELF 2 Copyright 2008, 2009, 2010, 2011, 2012 Free Software Foundation, Inc. 3 Contributed by Jon Beniston <jon@beniston.com> 4 5 This file is part of BFD, the Binary File Descriptor library. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program; if not, write to the Free Software 19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 20 MA 02110-1301, USA. */ 21 22 #include "sysdep.h" 23 #include "bfd.h" 24 #include "libbfd.h" 25 #include "elf-bfd.h" 26 #include "elf/lm32.h" 27 28 #define DEFAULT_STACK_SIZE 0x20000 29 30 #define PLT_ENTRY_SIZE 20 31 32 #define PLT0_ENTRY_WORD0 0 33 #define PLT0_ENTRY_WORD1 0 34 #define PLT0_ENTRY_WORD2 0 35 #define PLT0_ENTRY_WORD3 0 36 #define PLT0_ENTRY_WORD4 0 37 38 #define PLT0_PIC_ENTRY_WORD0 0 39 #define PLT0_PIC_ENTRY_WORD1 0 40 #define PLT0_PIC_ENTRY_WORD2 0 41 #define PLT0_PIC_ENTRY_WORD3 0 42 #define PLT0_PIC_ENTRY_WORD4 0 43 44 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1" 45 46 extern const bfd_target bfd_elf32_lm32fdpic_vec; 47 48 #define IS_FDPIC(bfd) ((bfd)->xvec == &bfd_elf32_lm32fdpic_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; 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); 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 1310 /* Some relocs require a global offset table. */ 1311 if (htab->sgot == NULL) 1312 { 1313 switch (r_type) 1314 { 1315 case R_LM32_16_GOT: 1316 case R_LM32_GOTOFF_HI16: 1317 case R_LM32_GOTOFF_LO16: 1318 if (dynobj == NULL) 1319 htab->root.dynobj = dynobj = abfd; 1320 if (! create_got_section (dynobj, info)) 1321 return FALSE; 1322 break; 1323 } 1324 } 1325 1326 /* Some relocs require a rofixup table. */ 1327 if (IS_FDPIC (abfd)) 1328 { 1329 switch (r_type) 1330 { 1331 case R_LM32_32: 1332 /* FDPIC requires a GOT if there is a .rofixup section 1333 (Normal ELF doesn't). */ 1334 if (dynobj == NULL) 1335 htab->root.dynobj = dynobj = abfd; 1336 if (! create_got_section (dynobj, info)) 1337 return FALSE; 1338 /* Create .rofixup section */ 1339 if (htab->sfixup32 == NULL) 1340 { 1341 if (! create_rofixup_section (dynobj, info)) 1342 return FALSE; 1343 } 1344 break; 1345 case R_LM32_16_GOT: 1346 case R_LM32_GOTOFF_HI16: 1347 case R_LM32_GOTOFF_LO16: 1348 /* Create .rofixup section. */ 1349 if (htab->sfixup32 == NULL) 1350 { 1351 if (dynobj == NULL) 1352 htab->root.dynobj = dynobj = abfd; 1353 if (! create_rofixup_section (dynobj, info)) 1354 return FALSE; 1355 } 1356 break; 1357 } 1358 } 1359 1360 switch (r_type) 1361 { 1362 case R_LM32_16_GOT: 1363 if (h != NULL) 1364 h->got.refcount += 1; 1365 else 1366 { 1367 bfd_signed_vma *local_got_refcounts; 1368 1369 /* This is a global offset table entry for a local symbol. */ 1370 local_got_refcounts = elf_local_got_refcounts (abfd); 1371 if (local_got_refcounts == NULL) 1372 { 1373 bfd_size_type size; 1374 1375 size = symtab_hdr->sh_info; 1376 size *= sizeof (bfd_signed_vma); 1377 local_got_refcounts = bfd_zalloc (abfd, size); 1378 if (local_got_refcounts == NULL) 1379 return FALSE; 1380 elf_local_got_refcounts (abfd) = local_got_refcounts; 1381 } 1382 local_got_refcounts[r_symndx] += 1; 1383 } 1384 break; 1385 1386 /* This relocation describes the C++ object vtable hierarchy. 1387 Reconstruct it for later use during GC. */ 1388 case R_LM32_GNU_VTINHERIT: 1389 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 1390 return FALSE; 1391 break; 1392 1393 /* This relocation describes which C++ vtable entries are actually 1394 used. Record for later use during GC. */ 1395 case R_LM32_GNU_VTENTRY: 1396 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 1397 return FALSE; 1398 break; 1399 1400 } 1401 } 1402 1403 return TRUE; 1404 } 1405 1406 /* Finish up the dynamic sections. */ 1407 1408 static bfd_boolean 1409 lm32_elf_finish_dynamic_sections (bfd *output_bfd, 1410 struct bfd_link_info *info) 1411 { 1412 struct elf_lm32_link_hash_table *htab; 1413 bfd *dynobj; 1414 asection *sdyn; 1415 asection *sgot; 1416 1417 htab = lm32_elf_hash_table (info); 1418 if (htab == NULL) 1419 return FALSE; 1420 1421 dynobj = htab->root.dynobj; 1422 1423 sgot = htab->sgotplt; 1424 sdyn = bfd_get_linker_section (dynobj, ".dynamic"); 1425 1426 if (htab->root.dynamic_sections_created) 1427 { 1428 asection *splt; 1429 Elf32_External_Dyn *dyncon, *dynconend; 1430 1431 BFD_ASSERT (sgot != NULL && sdyn != NULL); 1432 1433 dyncon = (Elf32_External_Dyn *) sdyn->contents; 1434 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); 1435 1436 for (; dyncon < dynconend; dyncon++) 1437 { 1438 Elf_Internal_Dyn dyn; 1439 asection *s; 1440 1441 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); 1442 1443 switch (dyn.d_tag) 1444 { 1445 default: 1446 break; 1447 1448 case DT_PLTGOT: 1449 s = htab->sgot->output_section; 1450 goto get_vma; 1451 case DT_JMPREL: 1452 s = htab->srelplt->output_section; 1453 get_vma: 1454 BFD_ASSERT (s != NULL); 1455 dyn.d_un.d_ptr = s->vma; 1456 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 1457 break; 1458 1459 case DT_PLTRELSZ: 1460 s = htab->srelplt->output_section; 1461 BFD_ASSERT (s != NULL); 1462 dyn.d_un.d_val = s->size; 1463 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 1464 break; 1465 1466 case DT_RELASZ: 1467 /* My reading of the SVR4 ABI indicates that the 1468 procedure linkage table relocs (DT_JMPREL) should be 1469 included in the overall relocs (DT_RELA). This is 1470 what Solaris does. However, UnixWare can not handle 1471 that case. Therefore, we override the DT_RELASZ entry 1472 here to make it not include the JMPREL relocs. Since 1473 the linker script arranges for .rela.plt to follow all 1474 other relocation sections, we don't have to worry 1475 about changing the DT_RELA entry. */ 1476 if (htab->srelplt != NULL) 1477 { 1478 s = htab->srelplt->output_section; 1479 dyn.d_un.d_val -= s->size; 1480 } 1481 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 1482 break; 1483 } 1484 } 1485 1486 /* Fill in the first entry in the procedure linkage table. */ 1487 splt = htab->splt; 1488 if (splt && splt->size > 0) 1489 { 1490 if (info->shared) 1491 { 1492 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD0, splt->contents); 1493 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD1, splt->contents + 4); 1494 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD2, splt->contents + 8); 1495 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD3, splt->contents + 12); 1496 bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD4, splt->contents + 16); 1497 } 1498 else 1499 { 1500 unsigned long addr; 1501 /* addr = .got + 4 */ 1502 addr = sgot->output_section->vma + sgot->output_offset + 4; 1503 bfd_put_32 (output_bfd, 1504 PLT0_ENTRY_WORD0 | ((addr >> 16) & 0xffff), 1505 splt->contents); 1506 bfd_put_32 (output_bfd, 1507 PLT0_ENTRY_WORD1 | (addr & 0xffff), 1508 splt->contents + 4); 1509 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD2, splt->contents + 8); 1510 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD3, splt->contents + 12); 1511 bfd_put_32 (output_bfd, PLT0_ENTRY_WORD4, splt->contents + 16); 1512 } 1513 1514 elf_section_data (splt->output_section)->this_hdr.sh_entsize = 1515 PLT_ENTRY_SIZE; 1516 } 1517 } 1518 1519 /* Fill in the first three entries in the global offset table. */ 1520 if (sgot && sgot->size > 0) 1521 { 1522 if (sdyn == NULL) 1523 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); 1524 else 1525 bfd_put_32 (output_bfd, 1526 sdyn->output_section->vma + sdyn->output_offset, 1527 sgot->contents); 1528 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); 1529 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); 1530 1531 /* FIXME: This can be null if create_dynamic_sections wasn't called. */ 1532 if (elf_section_data (sgot->output_section) != NULL) 1533 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; 1534 } 1535 1536 if (lm32fdpic_fixup32_section (info)) 1537 { 1538 struct elf_link_hash_entry *hgot = elf_hash_table (info)->hgot; 1539 bfd_vma got_value = hgot->root.u.def.value 1540 + hgot->root.u.def.section->output_section->vma 1541 + hgot->root.u.def.section->output_offset; 1542 struct bfd_link_hash_entry *hend; 1543 1544 /* Last entry is pointer to GOT. */ 1545 _lm32fdpic_add_rofixup (output_bfd, lm32fdpic_fixup32_section (info), got_value); 1546 1547 /* Check we wrote enough entries. */ 1548 if (lm32fdpic_fixup32_section (info)->size 1549 != (lm32fdpic_fixup32_section (info)->reloc_count * 4)) 1550 { 1551 (*_bfd_error_handler) 1552 ("LINKER BUG: .rofixup section size mismatch: size/4 %d != relocs %d", 1553 lm32fdpic_fixup32_section (info)->size/4, 1554 lm32fdpic_fixup32_section (info)->reloc_count); 1555 return FALSE; 1556 } 1557 1558 hend = bfd_link_hash_lookup (info->hash, "__ROFIXUP_END__", 1559 FALSE, FALSE, TRUE); 1560 if (hend 1561 && (hend->type == bfd_link_hash_defined 1562 || hend->type == bfd_link_hash_defweak)) 1563 { 1564 bfd_vma value = 1565 lm32fdpic_fixup32_section (info)->output_section->vma 1566 + lm32fdpic_fixup32_section (info)->output_offset 1567 + lm32fdpic_fixup32_section (info)->size 1568 - hend->u.def.section->output_section->vma 1569 - hend->u.def.section->output_offset; 1570 BFD_ASSERT (hend->u.def.value == value); 1571 if (hend->u.def.value != value) 1572 { 1573 (*_bfd_error_handler) 1574 ("LINKER BUG: .rofixup section hend->u.def.value != value: %ld != %ld", hend->u.def.value, value); 1575 return FALSE; 1576 } 1577 } 1578 } 1579 1580 return TRUE; 1581 } 1582 1583 /* Finish up dynamic symbol handling. We set the contents of various 1584 dynamic sections here. */ 1585 1586 static bfd_boolean 1587 lm32_elf_finish_dynamic_symbol (bfd *output_bfd, 1588 struct bfd_link_info *info, 1589 struct elf_link_hash_entry *h, 1590 Elf_Internal_Sym *sym) 1591 { 1592 struct elf_lm32_link_hash_table *htab; 1593 bfd_byte *loc; 1594 1595 htab = lm32_elf_hash_table (info); 1596 if (htab == NULL) 1597 return FALSE; 1598 1599 if (h->plt.offset != (bfd_vma) -1) 1600 { 1601 asection *splt; 1602 asection *sgot; 1603 asection *srela; 1604 1605 bfd_vma plt_index; 1606 bfd_vma got_offset; 1607 Elf_Internal_Rela rela; 1608 1609 /* This symbol has an entry in the procedure linkage table. Set 1610 it up. */ 1611 BFD_ASSERT (h->dynindx != -1); 1612 1613 splt = htab->splt; 1614 sgot = htab->sgotplt; 1615 srela = htab->srelplt; 1616 BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL); 1617 1618 /* Get the index in the procedure linkage table which 1619 corresponds to this symbol. This is the index of this symbol 1620 in all the symbols for which we are making plt entries. The 1621 first entry in the procedure linkage table is reserved. */ 1622 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; 1623 1624 /* Get the offset into the .got table of the entry that 1625 corresponds to this function. Each .got entry is 4 bytes. 1626 The first three are reserved. */ 1627 got_offset = (plt_index + 3) * 4; 1628 1629 /* Fill in the entry in the procedure linkage table. */ 1630 if (! info->shared) 1631 { 1632 /* TODO */ 1633 } 1634 else 1635 { 1636 /* TODO */ 1637 } 1638 1639 /* Fill in the entry in the global offset table. */ 1640 bfd_put_32 (output_bfd, 1641 (splt->output_section->vma 1642 + splt->output_offset 1643 + h->plt.offset 1644 + 12), /* same offset */ 1645 sgot->contents + got_offset); 1646 1647 /* Fill in the entry in the .rela.plt section. */ 1648 rela.r_offset = (sgot->output_section->vma 1649 + sgot->output_offset 1650 + got_offset); 1651 rela.r_info = ELF32_R_INFO (h->dynindx, R_LM32_JMP_SLOT); 1652 rela.r_addend = 0; 1653 loc = srela->contents; 1654 loc += plt_index * sizeof (Elf32_External_Rela); 1655 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 1656 1657 if (!h->def_regular) 1658 { 1659 /* Mark the symbol as undefined, rather than as defined in 1660 the .plt section. Leave the value alone. */ 1661 sym->st_shndx = SHN_UNDEF; 1662 } 1663 1664 } 1665 1666 if (h->got.offset != (bfd_vma) -1) 1667 { 1668 asection *sgot; 1669 asection *srela; 1670 Elf_Internal_Rela rela; 1671 1672 /* This symbol has an entry in the global offset table. Set it 1673 up. */ 1674 sgot = htab->sgot; 1675 srela = htab->srelgot; 1676 BFD_ASSERT (sgot != NULL && srela != NULL); 1677 1678 rela.r_offset = (sgot->output_section->vma 1679 + sgot->output_offset 1680 + (h->got.offset &~ 1)); 1681 1682 /* If this is a -Bsymbolic link, and the symbol is defined 1683 locally, we just want to emit a RELATIVE reloc. Likewise if 1684 the symbol was forced to be local because of a version file. 1685 The entry in the global offset table will already have been 1686 initialized in the relocate_section function. */ 1687 if (info->shared 1688 && (info->symbolic 1689 || h->dynindx == -1 1690 || h->forced_local) 1691 && h->def_regular) 1692 { 1693 rela.r_info = ELF32_R_INFO (0, R_LM32_RELATIVE); 1694 rela.r_addend = (h->root.u.def.value 1695 + h->root.u.def.section->output_section->vma 1696 + h->root.u.def.section->output_offset); 1697 } 1698 else 1699 { 1700 BFD_ASSERT ((h->got.offset & 1) == 0); 1701 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset); 1702 rela.r_info = ELF32_R_INFO (h->dynindx, R_LM32_GLOB_DAT); 1703 rela.r_addend = 0; 1704 } 1705 1706 loc = srela->contents; 1707 loc += srela->reloc_count * sizeof (Elf32_External_Rela); 1708 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 1709 ++srela->reloc_count; 1710 } 1711 1712 if (h->needs_copy) 1713 { 1714 asection *s; 1715 Elf_Internal_Rela rela; 1716 1717 /* This symbols needs a copy reloc. Set it up. */ 1718 BFD_ASSERT (h->dynindx != -1 1719 && (h->root.type == bfd_link_hash_defined 1720 || h->root.type == bfd_link_hash_defweak)); 1721 1722 s = bfd_get_linker_section (htab->root.dynobj, ".rela.bss"); 1723 BFD_ASSERT (s != NULL); 1724 1725 rela.r_offset = (h->root.u.def.value 1726 + h->root.u.def.section->output_section->vma 1727 + h->root.u.def.section->output_offset); 1728 rela.r_info = ELF32_R_INFO (h->dynindx, R_LM32_COPY); 1729 rela.r_addend = 0; 1730 loc = s->contents; 1731 loc += s->reloc_count * sizeof (Elf32_External_Rela); 1732 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 1733 ++s->reloc_count; 1734 } 1735 1736 /* Mark some specially defined symbols as absolute. */ 1737 if (h == htab->root.hdynamic || h == htab->root.hgot) 1738 sym->st_shndx = SHN_ABS; 1739 1740 return TRUE; 1741 } 1742 1743 static enum elf_reloc_type_class 1744 lm32_elf_reloc_type_class (const Elf_Internal_Rela *rela) 1745 { 1746 switch ((int) ELF32_R_TYPE (rela->r_info)) 1747 { 1748 case R_LM32_RELATIVE: return reloc_class_relative; 1749 case R_LM32_JMP_SLOT: return reloc_class_plt; 1750 case R_LM32_COPY: return reloc_class_copy; 1751 default: return reloc_class_normal; 1752 } 1753 } 1754 1755 /* Adjust a symbol defined by a dynamic object and referenced by a 1756 regular object. The current definition is in some section of the 1757 dynamic object, but we're not including those sections. We have to 1758 change the definition to something the rest of the link can 1759 understand. */ 1760 1761 static bfd_boolean 1762 lm32_elf_adjust_dynamic_symbol (struct bfd_link_info *info, 1763 struct elf_link_hash_entry *h) 1764 { 1765 struct elf_lm32_link_hash_table *htab; 1766 struct elf_lm32_link_hash_entry *eh; 1767 struct elf_lm32_dyn_relocs *p; 1768 bfd *dynobj; 1769 asection *s; 1770 1771 dynobj = elf_hash_table (info)->dynobj; 1772 1773 /* Make sure we know what is going on here. */ 1774 BFD_ASSERT (dynobj != NULL 1775 && (h->needs_plt 1776 || h->u.weakdef != NULL 1777 || (h->def_dynamic 1778 && h->ref_regular 1779 && !h->def_regular))); 1780 1781 /* If this is a function, put it in the procedure linkage table. We 1782 will fill in the contents of the procedure linkage table later, 1783 when we know the address of the .got section. */ 1784 if (h->type == STT_FUNC 1785 || h->needs_plt) 1786 { 1787 if (! info->shared 1788 && !h->def_dynamic 1789 && !h->ref_dynamic 1790 && h->root.type != bfd_link_hash_undefweak 1791 && h->root.type != bfd_link_hash_undefined) 1792 { 1793 /* This case can occur if we saw a PLT reloc in an input 1794 file, but the symbol was never referred to by a dynamic 1795 object. In such a case, we don't actually need to build 1796 a procedure linkage table, and we can just do a PCREL 1797 reloc instead. */ 1798 h->plt.offset = (bfd_vma) -1; 1799 h->needs_plt = 0; 1800 } 1801 1802 return TRUE; 1803 } 1804 else 1805 h->plt.offset = (bfd_vma) -1; 1806 1807 /* If this is a weak symbol, and there is a real definition, the 1808 processor independent code will have arranged for us to see the 1809 real definition first, and we can just use the same value. */ 1810 if (h->u.weakdef != NULL) 1811 { 1812 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined 1813 || h->u.weakdef->root.type == bfd_link_hash_defweak); 1814 h->root.u.def.section = h->u.weakdef->root.u.def.section; 1815 h->root.u.def.value = h->u.weakdef->root.u.def.value; 1816 return TRUE; 1817 } 1818 1819 /* This is a reference to a symbol defined by a dynamic object which 1820 is not a function. */ 1821 1822 /* If we are creating a shared library, we must presume that the 1823 only references to the symbol are via the global offset table. 1824 For such cases we need not do anything here; the relocations will 1825 be handled correctly by relocate_section. */ 1826 if (info->shared) 1827 return TRUE; 1828 1829 /* If there are no references to this symbol that do not use the 1830 GOT, we don't need to generate a copy reloc. */ 1831 if (!h->non_got_ref) 1832 return TRUE; 1833 1834 /* If -z nocopyreloc was given, we won't generate them either. */ 1835 if (info->nocopyreloc) 1836 { 1837 h->non_got_ref = 0; 1838 return TRUE; 1839 } 1840 1841 eh = (struct elf_lm32_link_hash_entry *) h; 1842 for (p = eh->dyn_relocs; p != NULL; p = p->next) 1843 { 1844 s = p->sec->output_section; 1845 if (s != NULL && (s->flags & (SEC_READONLY | SEC_HAS_CONTENTS)) != 0) 1846 break; 1847 } 1848 1849 /* If we didn't find any dynamic relocs in sections which needs the 1850 copy reloc, then we'll be keeping the dynamic relocs and avoiding 1851 the copy reloc. */ 1852 if (p == NULL) 1853 { 1854 h->non_got_ref = 0; 1855 return TRUE; 1856 } 1857 1858 /* We must allocate the symbol in our .dynbss section, which will 1859 become part of the .bss section of the executable. There will be 1860 an entry for this symbol in the .dynsym section. The dynamic 1861 object will contain position independent code, so all references 1862 from the dynamic object to this symbol will go through the global 1863 offset table. The dynamic linker will use the .dynsym entry to 1864 determine the address it must put in the global offset table, so 1865 both the dynamic object and the regular object will refer to the 1866 same memory location for the variable. */ 1867 1868 htab = lm32_elf_hash_table (info); 1869 if (htab == NULL) 1870 return FALSE; 1871 1872 s = htab->sdynbss; 1873 BFD_ASSERT (s != NULL); 1874 1875 /* We must generate a R_LM32_COPY reloc to tell the dynamic linker 1876 to copy the initial value out of the dynamic object and into the 1877 runtime process image. We need to remember the offset into the 1878 .rela.bss section we are going to use. */ 1879 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) 1880 { 1881 asection *srel; 1882 1883 srel = htab->srelbss; 1884 BFD_ASSERT (srel != NULL); 1885 srel->size += sizeof (Elf32_External_Rela); 1886 h->needs_copy = 1; 1887 } 1888 1889 return _bfd_elf_adjust_dynamic_copy (h, s); 1890 } 1891 1892 /* Allocate space in .plt, .got and associated reloc sections for 1893 dynamic relocs. */ 1894 1895 static bfd_boolean 1896 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) 1897 { 1898 struct bfd_link_info *info; 1899 struct elf_lm32_link_hash_table *htab; 1900 struct elf_lm32_link_hash_entry *eh; 1901 struct elf_lm32_dyn_relocs *p; 1902 1903 if (h->root.type == bfd_link_hash_indirect) 1904 return TRUE; 1905 1906 info = (struct bfd_link_info *) inf; 1907 htab = lm32_elf_hash_table (info); 1908 if (htab == NULL) 1909 return FALSE; 1910 1911 eh = (struct elf_lm32_link_hash_entry *) h; 1912 1913 if (htab->root.dynamic_sections_created 1914 && h->plt.refcount > 0) 1915 { 1916 /* Make sure this symbol is output as a dynamic symbol. 1917 Undefined weak syms won't yet be marked as dynamic. */ 1918 if (h->dynindx == -1 1919 && !h->forced_local) 1920 { 1921 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1922 return FALSE; 1923 } 1924 1925 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h)) 1926 { 1927 asection *s = htab->splt; 1928 1929 /* If this is the first .plt entry, make room for the special 1930 first entry. */ 1931 if (s->size == 0) 1932 s->size += PLT_ENTRY_SIZE; 1933 1934 h->plt.offset = s->size; 1935 1936 /* If this symbol is not defined in a regular file, and we are 1937 not generating a shared library, then set the symbol to this 1938 location in the .plt. This is required to make function 1939 pointers compare as equal between the normal executable and 1940 the shared library. */ 1941 if (! info->shared 1942 && !h->def_regular) 1943 { 1944 h->root.u.def.section = s; 1945 h->root.u.def.value = h->plt.offset; 1946 } 1947 1948 /* Make room for this entry. */ 1949 s->size += PLT_ENTRY_SIZE; 1950 1951 /* We also need to make an entry in the .got.plt section, which 1952 will be placed in the .got section by the linker script. */ 1953 htab->sgotplt->size += 4; 1954 1955 /* We also need to make an entry in the .rel.plt section. */ 1956 htab->srelplt->size += sizeof (Elf32_External_Rela); 1957 } 1958 else 1959 { 1960 h->plt.offset = (bfd_vma) -1; 1961 h->needs_plt = 0; 1962 } 1963 } 1964 else 1965 { 1966 h->plt.offset = (bfd_vma) -1; 1967 h->needs_plt = 0; 1968 } 1969 1970 if (h->got.refcount > 0) 1971 { 1972 asection *s; 1973 bfd_boolean dyn; 1974 1975 /* Make sure this symbol is output as a dynamic symbol. 1976 Undefined weak syms won't yet be marked as dynamic. */ 1977 if (h->dynindx == -1 1978 && !h->forced_local) 1979 { 1980 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 1981 return FALSE; 1982 } 1983 1984 s = htab->sgot; 1985 1986 h->got.offset = s->size; 1987 s->size += 4; 1988 dyn = htab->root.dynamic_sections_created; 1989 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)) 1990 htab->srelgot->size += sizeof (Elf32_External_Rela); 1991 } 1992 else 1993 h->got.offset = (bfd_vma) -1; 1994 1995 if (eh->dyn_relocs == NULL) 1996 return TRUE; 1997 1998 /* In the shared -Bsymbolic case, discard space allocated for 1999 dynamic pc-relative relocs against symbols which turn out to be 2000 defined in regular objects. For the normal shared case, discard 2001 space for pc-relative relocs that have become local due to symbol 2002 visibility changes. */ 2003 2004 if (info->shared) 2005 { 2006 if (h->def_regular 2007 && (h->forced_local 2008 || info->symbolic)) 2009 { 2010 struct elf_lm32_dyn_relocs **pp; 2011 2012 for (pp = &eh->dyn_relocs; (p = *pp) != NULL;) 2013 { 2014 p->count -= p->pc_count; 2015 p->pc_count = 0; 2016 if (p->count == 0) 2017 *pp = p->next; 2018 else 2019 pp = &p->next; 2020 } 2021 } 2022 2023 /* Also discard relocs on undefined weak syms with non-default 2024 visibility. */ 2025 if (eh->dyn_relocs != NULL 2026 && h->root.type == bfd_link_hash_undefweak) 2027 { 2028 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) 2029 eh->dyn_relocs = NULL; 2030 2031 /* Make sure undefined weak symbols are output as a dynamic 2032 symbol in PIEs. */ 2033 else if (h->dynindx == -1 2034 && !h->forced_local) 2035 { 2036 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 2037 return FALSE; 2038 } 2039 } 2040 } 2041 else 2042 { 2043 /* For the non-shared case, discard space for relocs against 2044 symbols which turn out to need copy relocs or are not 2045 dynamic. */ 2046 2047 if (!h->non_got_ref 2048 && ((h->def_dynamic 2049 && !h->def_regular) 2050 || (htab->root.dynamic_sections_created 2051 && (h->root.type == bfd_link_hash_undefweak 2052 || h->root.type == bfd_link_hash_undefined)))) 2053 { 2054 /* Make sure this symbol is output as a dynamic symbol. 2055 Undefined weak syms won't yet be marked as dynamic. */ 2056 if (h->dynindx == -1 2057 && !h->forced_local) 2058 { 2059 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 2060 return FALSE; 2061 } 2062 2063 /* If that succeeded, we know we'll be keeping all the 2064 relocs. */ 2065 if (h->dynindx != -1) 2066 goto keep; 2067 } 2068 2069 eh->dyn_relocs = NULL; 2070 2071 keep: ; 2072 } 2073 2074 /* Finally, allocate space. */ 2075 for (p = eh->dyn_relocs; p != NULL; p = p->next) 2076 { 2077 asection *sreloc = elf_section_data (p->sec)->sreloc; 2078 sreloc->size += p->count * sizeof (Elf32_External_Rela); 2079 } 2080 2081 return TRUE; 2082 } 2083 2084 /* Find any dynamic relocs that apply to read-only sections. */ 2085 2086 static bfd_boolean 2087 readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf) 2088 { 2089 struct elf_lm32_link_hash_entry *eh; 2090 struct elf_lm32_dyn_relocs *p; 2091 2092 eh = (struct elf_lm32_link_hash_entry *) h; 2093 for (p = eh->dyn_relocs; p != NULL; p = p->next) 2094 { 2095 asection *s = p->sec->output_section; 2096 2097 if (s != NULL && (s->flags & SEC_READONLY) != 0) 2098 { 2099 struct bfd_link_info *info = (struct bfd_link_info *) inf; 2100 2101 info->flags |= DF_TEXTREL; 2102 2103 /* Not an error, just cut short the traversal. */ 2104 return FALSE; 2105 } 2106 } 2107 return TRUE; 2108 } 2109 2110 /* Set the sizes of the dynamic sections. */ 2111 2112 static bfd_boolean 2113 lm32_elf_size_dynamic_sections (bfd *output_bfd, 2114 struct bfd_link_info *info) 2115 { 2116 struct elf_lm32_link_hash_table *htab; 2117 bfd *dynobj; 2118 asection *s; 2119 bfd_boolean relocs; 2120 bfd *ibfd; 2121 2122 htab = lm32_elf_hash_table (info); 2123 if (htab == NULL) 2124 return FALSE; 2125 2126 dynobj = htab->root.dynobj; 2127 BFD_ASSERT (dynobj != NULL); 2128 2129 if (htab->root.dynamic_sections_created) 2130 { 2131 /* Set the contents of the .interp section to the interpreter. */ 2132 if (info->executable) 2133 { 2134 s = bfd_get_linker_section (dynobj, ".interp"); 2135 BFD_ASSERT (s != NULL); 2136 s->size = sizeof ELF_DYNAMIC_INTERPRETER; 2137 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; 2138 } 2139 } 2140 2141 /* Set up .got offsets for local syms, and space for local dynamic 2142 relocs. */ 2143 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) 2144 { 2145 bfd_signed_vma *local_got; 2146 bfd_signed_vma *end_local_got; 2147 bfd_size_type locsymcount; 2148 Elf_Internal_Shdr *symtab_hdr; 2149 asection *srel; 2150 2151 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) 2152 continue; 2153 2154 for (s = ibfd->sections; s != NULL; s = s->next) 2155 { 2156 struct elf_lm32_dyn_relocs *p; 2157 2158 for (p = ((struct elf_lm32_dyn_relocs *) 2159 elf_section_data (s)->local_dynrel); 2160 p != NULL; 2161 p = p->next) 2162 { 2163 if (! bfd_is_abs_section (p->sec) 2164 && bfd_is_abs_section (p->sec->output_section)) 2165 { 2166 /* Input section has been discarded, either because 2167 it is a copy of a linkonce section or due to 2168 linker script /DISCARD/, so we'll be discarding 2169 the relocs too. */ 2170 } 2171 else if (p->count != 0) 2172 { 2173 srel = elf_section_data (p->sec)->sreloc; 2174 srel->size += p->count * sizeof (Elf32_External_Rela); 2175 if ((p->sec->output_section->flags & SEC_READONLY) != 0) 2176 info->flags |= DF_TEXTREL; 2177 } 2178 } 2179 } 2180 2181 local_got = elf_local_got_refcounts (ibfd); 2182 if (!local_got) 2183 continue; 2184 2185 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; 2186 locsymcount = symtab_hdr->sh_info; 2187 end_local_got = local_got + locsymcount; 2188 s = htab->sgot; 2189 srel = htab->srelgot; 2190 for (; local_got < end_local_got; ++local_got) 2191 { 2192 if (*local_got > 0) 2193 { 2194 *local_got = s->size; 2195 s->size += 4; 2196 if (info->shared) 2197 srel->size += sizeof (Elf32_External_Rela); 2198 } 2199 else 2200 *local_got = (bfd_vma) -1; 2201 } 2202 } 2203 2204 /* Allocate global sym .plt and .got entries, and space for global 2205 sym dynamic relocs. */ 2206 elf_link_hash_traverse (&htab->root, allocate_dynrelocs, info); 2207 2208 /* We now have determined the sizes of the various dynamic sections. 2209 Allocate memory for them. */ 2210 relocs = FALSE; 2211 for (s = dynobj->sections; s != NULL; s = s->next) 2212 { 2213 if ((s->flags & SEC_LINKER_CREATED) == 0) 2214 continue; 2215 2216 if (s == htab->splt 2217 || s == htab->sgot 2218 || s == htab->sgotplt 2219 || s == htab->sdynbss) 2220 { 2221 /* Strip this section if we don't need it; see the 2222 comment below. */ 2223 } 2224 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) 2225 { 2226 if (s->size != 0 && s != htab->srelplt) 2227 relocs = TRUE; 2228 2229 /* We use the reloc_count field as a counter if we need 2230 to copy relocs into the output file. */ 2231 s->reloc_count = 0; 2232 } 2233 else 2234 /* It's not one of our sections, so don't allocate space. */ 2235 continue; 2236 2237 if (s->size == 0) 2238 { 2239 /* If we don't need this section, strip it from the 2240 output file. This is mostly to handle .rela.bss and 2241 .rela.plt. We must create both sections in 2242 create_dynamic_sections, because they must be created 2243 before the linker maps input sections to output 2244 sections. The linker does that before 2245 adjust_dynamic_symbol is called, and it is that 2246 function which decides whether anything needs to go 2247 into these sections. */ 2248 s->flags |= SEC_EXCLUDE; 2249 continue; 2250 } 2251 2252 if ((s->flags & SEC_HAS_CONTENTS) == 0) 2253 continue; 2254 2255 /* Allocate memory for the section contents. We use bfd_zalloc 2256 here in case unused entries are not reclaimed before the 2257 section's contents are written out. This should not happen, 2258 but this way if it does, we get a R_LM32_NONE reloc instead 2259 of garbage. */ 2260 s->contents = bfd_zalloc (dynobj, s->size); 2261 if (s->contents == NULL) 2262 return FALSE; 2263 } 2264 2265 if (htab->root.dynamic_sections_created) 2266 { 2267 /* Add some entries to the .dynamic section. We fill in the 2268 values later, in lm32_elf_finish_dynamic_sections, but we 2269 must add the entries now so that we get the correct size for 2270 the .dynamic section. The DT_DEBUG entry is filled in by the 2271 dynamic linker and used by the debugger. */ 2272 #define add_dynamic_entry(TAG, VAL) \ 2273 _bfd_elf_add_dynamic_entry (info, TAG, VAL) 2274 2275 if (info->executable) 2276 { 2277 if (! add_dynamic_entry (DT_DEBUG, 0)) 2278 return FALSE; 2279 } 2280 2281 if (htab->splt->size != 0) 2282 { 2283 if (! add_dynamic_entry (DT_PLTGOT, 0) 2284 || ! add_dynamic_entry (DT_PLTRELSZ, 0) 2285 || ! add_dynamic_entry (DT_PLTREL, DT_RELA) 2286 || ! add_dynamic_entry (DT_JMPREL, 0)) 2287 return FALSE; 2288 } 2289 2290 if (relocs) 2291 { 2292 if (! add_dynamic_entry (DT_RELA, 0) 2293 || ! add_dynamic_entry (DT_RELASZ, 0) 2294 || ! add_dynamic_entry (DT_RELAENT, 2295 sizeof (Elf32_External_Rela))) 2296 return FALSE; 2297 2298 /* If any dynamic relocs apply to a read-only section, 2299 then we need a DT_TEXTREL entry. */ 2300 if ((info->flags & DF_TEXTREL) == 0) 2301 elf_link_hash_traverse (&htab->root, readonly_dynrelocs, 2302 info); 2303 2304 if ((info->flags & DF_TEXTREL) != 0) 2305 { 2306 if (! add_dynamic_entry (DT_TEXTREL, 0)) 2307 return FALSE; 2308 } 2309 } 2310 } 2311 #undef add_dynamic_entry 2312 2313 /* Allocate .rofixup section. */ 2314 if (IS_FDPIC (output_bfd)) 2315 { 2316 struct weak_symbol_list *list_start = NULL, *list_end = NULL; 2317 int rgot_weak_count = 0; 2318 int r32_count = 0; 2319 int rgot_count = 0; 2320 /* Look for deleted sections. */ 2321 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) 2322 { 2323 for (s = ibfd->sections; s != NULL; s = s->next) 2324 { 2325 if (s->reloc_count) 2326 { 2327 /* Count relocs that need .rofixup entires. */ 2328 Elf_Internal_Rela *internal_relocs, *end; 2329 internal_relocs = elf_section_data (s)->relocs; 2330 if (internal_relocs == NULL) 2331 internal_relocs = (_bfd_elf_link_read_relocs (ibfd, s, NULL, NULL, FALSE)); 2332 if (internal_relocs != NULL) 2333 { 2334 end = internal_relocs + s->reloc_count; 2335 while (internal_relocs < end) 2336 { 2337 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; 2338 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd); 2339 unsigned long r_symndx; 2340 struct elf_link_hash_entry *h; 2341 2342 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; 2343 sym_hashes = elf_sym_hashes (ibfd); 2344 r_symndx = ELF32_R_SYM (internal_relocs->r_info); 2345 h = NULL; 2346 if (r_symndx < symtab_hdr->sh_info) 2347 { 2348 } 2349 else 2350 { 2351 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 2352 while (h->root.type == bfd_link_hash_indirect 2353 || h->root.type == bfd_link_hash_warning) 2354 h = (struct elf_link_hash_entry *) h->root.u.i.link; 2355 } 2356 2357 /* Don't generate entries for weak symbols. */ 2358 if (!h || (h && h->root.type != bfd_link_hash_undefweak)) 2359 { 2360 if (!discarded_section (s) && !((bfd_get_section_flags (ibfd, s) & SEC_ALLOC) == 0)) 2361 { 2362 switch (ELF32_R_TYPE (internal_relocs->r_info)) 2363 { 2364 case R_LM32_32: 2365 r32_count++; 2366 break; 2367 case R_LM32_16_GOT: 2368 rgot_count++; 2369 break; 2370 } 2371 } 2372 } 2373 else 2374 { 2375 struct weak_symbol_list *current, *new_entry; 2376 /* Is this symbol already in the list? */ 2377 for (current = list_start; current; current = current->next) 2378 { 2379 if (!strcmp (current->name, h->root.root.string)) 2380 break; 2381 } 2382 if (!current && !discarded_section (s) && (bfd_get_section_flags (ibfd, s) & SEC_ALLOC)) 2383 { 2384 /* Will this have an entry in the GOT. */ 2385 if (ELF32_R_TYPE (internal_relocs->r_info) == R_LM32_16_GOT) 2386 { 2387 /* Create a new entry. */ 2388 new_entry = malloc (sizeof (struct weak_symbol_list)); 2389 if (!new_entry) 2390 return FALSE; 2391 new_entry->name = h->root.root.string; 2392 new_entry->next = NULL; 2393 /* Add to list */ 2394 if (list_start == NULL) 2395 { 2396 list_start = new_entry; 2397 list_end = new_entry; 2398 } 2399 else 2400 { 2401 list_end->next = new_entry; 2402 list_end = new_entry; 2403 } 2404 /* Increase count of undefined weak symbols in the got. */ 2405 rgot_weak_count++; 2406 } 2407 } 2408 } 2409 internal_relocs++; 2410 } 2411 } 2412 else 2413 return FALSE; 2414 } 2415 } 2416 } 2417 /* Free list. */ 2418 while (list_start) 2419 { 2420 list_end = list_start->next; 2421 free (list_start); 2422 list_start = list_end; 2423 } 2424 2425 /* Size sections. */ 2426 lm32fdpic_fixup32_section (info)->size = (r32_count + (htab->sgot->size / 4) - rgot_weak_count + 1) * 4; 2427 if (lm32fdpic_fixup32_section (info)->size == 0) 2428 lm32fdpic_fixup32_section (info)->flags |= SEC_EXCLUDE; 2429 else 2430 { 2431 lm32fdpic_fixup32_section (info)->contents = 2432 bfd_zalloc (dynobj, lm32fdpic_fixup32_section (info)->size); 2433 if (lm32fdpic_fixup32_section (info)->contents == NULL) 2434 return FALSE; 2435 } 2436 } 2437 2438 return TRUE; 2439 } 2440 2441 /* Create dynamic sections when linking against a dynamic object. */ 2442 2443 static bfd_boolean 2444 lm32_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) 2445 { 2446 struct elf_lm32_link_hash_table *htab; 2447 flagword flags, pltflags; 2448 asection *s; 2449 const struct elf_backend_data *bed = get_elf_backend_data (abfd); 2450 int ptralign = 2; /* 32bit */ 2451 2452 htab = lm32_elf_hash_table (info); 2453 if (htab == NULL) 2454 return FALSE; 2455 2456 /* Make sure we have a GOT - For the case where we have a dynamic object 2457 but none of the relocs in check_relocs */ 2458 if (! create_got_section (abfd, info)) 2459 return FALSE; 2460 if (IS_FDPIC (abfd) && (htab->sfixup32 == NULL)) 2461 { 2462 if (! create_rofixup_section (abfd, info)) 2463 return FALSE; 2464 } 2465 2466 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and 2467 .rel[a].bss sections. */ 2468 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY 2469 | SEC_LINKER_CREATED); 2470 2471 pltflags = flags; 2472 pltflags |= SEC_CODE; 2473 if (bed->plt_not_loaded) 2474 pltflags &= ~ (SEC_LOAD | SEC_HAS_CONTENTS); 2475 if (bed->plt_readonly) 2476 pltflags |= SEC_READONLY; 2477 2478 s = bfd_make_section_anyway_with_flags (abfd, ".plt", pltflags); 2479 htab->splt = s; 2480 if (s == NULL 2481 || ! bfd_set_section_alignment (abfd, s, bed->plt_alignment)) 2482 return FALSE; 2483 2484 if (bed->want_plt_sym) 2485 { 2486 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the 2487 .plt section. */ 2488 struct bfd_link_hash_entry *bh = NULL; 2489 struct elf_link_hash_entry *h; 2490 2491 if (! (_bfd_generic_link_add_one_symbol 2492 (info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s, 2493 (bfd_vma) 0, NULL, FALSE, 2494 get_elf_backend_data (abfd)->collect, &bh))) 2495 return FALSE; 2496 h = (struct elf_link_hash_entry *) bh; 2497 h->def_regular = 1; 2498 h->type = STT_OBJECT; 2499 htab->root.hplt = h; 2500 2501 if (info->shared 2502 && ! bfd_elf_link_record_dynamic_symbol (info, h)) 2503 return FALSE; 2504 } 2505 2506 s = bfd_make_section_anyway_with_flags (abfd, 2507 bed->default_use_rela_p 2508 ? ".rela.plt" : ".rel.plt", 2509 flags | SEC_READONLY); 2510 htab->srelplt = s; 2511 if (s == NULL 2512 || ! bfd_set_section_alignment (abfd, s, ptralign)) 2513 return FALSE; 2514 2515 if (htab->sgot == NULL 2516 && ! create_got_section (abfd, info)) 2517 return FALSE; 2518 2519 if (bed->want_dynbss) 2520 { 2521 /* The .dynbss section is a place to put symbols which are defined 2522 by dynamic objects, are referenced by regular objects, and are 2523 not functions. We must allocate space for them in the process 2524 image and use a R_*_COPY reloc to tell the dynamic linker to 2525 initialize them at run time. The linker script puts the .dynbss 2526 section into the .bss section of the final image. */ 2527 s = bfd_make_section_anyway_with_flags (abfd, ".dynbss", 2528 SEC_ALLOC | SEC_LINKER_CREATED); 2529 htab->sdynbss = s; 2530 if (s == NULL) 2531 return FALSE; 2532 /* The .rel[a].bss section holds copy relocs. This section is not 2533 normally needed. We need to create it here, though, so that the 2534 linker will map it to an output section. We can't just create it 2535 only if we need it, because we will not know whether we need it 2536 until we have seen all the input files, and the first time the 2537 main linker code calls BFD after examining all the input files 2538 (size_dynamic_sections) the input sections have already been 2539 mapped to the output sections. If the section turns out not to 2540 be needed, we can discard it later. We will never need this 2541 section when generating a shared object, since they do not use 2542 copy relocs. */ 2543 if (! info->shared) 2544 { 2545 s = bfd_make_section_anyway_with_flags (abfd, 2546 (bed->default_use_rela_p 2547 ? ".rela.bss" : ".rel.bss"), 2548 flags | SEC_READONLY); 2549 htab->srelbss = s; 2550 if (s == NULL 2551 || ! bfd_set_section_alignment (abfd, s, ptralign)) 2552 return FALSE; 2553 } 2554 } 2555 2556 return TRUE; 2557 } 2558 2559 /* Copy the extra info we tack onto an elf_link_hash_entry. */ 2560 2561 static void 2562 lm32_elf_copy_indirect_symbol (struct bfd_link_info *info, 2563 struct elf_link_hash_entry *dir, 2564 struct elf_link_hash_entry *ind) 2565 { 2566 struct elf_lm32_link_hash_entry * edir; 2567 struct elf_lm32_link_hash_entry * eind; 2568 2569 edir = (struct elf_lm32_link_hash_entry *) dir; 2570 eind = (struct elf_lm32_link_hash_entry *) ind; 2571 2572 if (eind->dyn_relocs != NULL) 2573 { 2574 if (edir->dyn_relocs != NULL) 2575 { 2576 struct elf_lm32_dyn_relocs **pp; 2577 struct elf_lm32_dyn_relocs *p; 2578 2579 /* Add reloc counts against the indirect sym to the direct sym 2580 list. Merge any entries against the same section. */ 2581 for (pp = &eind->dyn_relocs; (p = *pp) != NULL;) 2582 { 2583 struct elf_lm32_dyn_relocs *q; 2584 2585 for (q = edir->dyn_relocs; q != NULL; q = q->next) 2586 if (q->sec == p->sec) 2587 { 2588 q->pc_count += p->pc_count; 2589 q->count += p->count; 2590 *pp = p->next; 2591 break; 2592 } 2593 if (q == NULL) 2594 pp = &p->next; 2595 } 2596 *pp = edir->dyn_relocs; 2597 } 2598 2599 edir->dyn_relocs = eind->dyn_relocs; 2600 eind->dyn_relocs = NULL; 2601 } 2602 2603 _bfd_elf_link_hash_copy_indirect (info, dir, ind); 2604 } 2605 2606 static bfd_boolean 2607 lm32_elf_always_size_sections (bfd *output_bfd, struct bfd_link_info *info) 2608 { 2609 if (!info->relocatable) 2610 { 2611 if (!bfd_elf_stack_segment_size (output_bfd, info, 2612 "__stacksize", DEFAULT_STACK_SIZE)) 2613 return FALSE; 2614 2615 asection *sec = bfd_get_section_by_name (output_bfd, ".stack"); 2616 if (sec) 2617 sec->size = info->stacksize >= 0 ? info->stacksize : 0; 2618 } 2619 2620 return TRUE; 2621 } 2622 2623 static bfd_boolean 2624 lm32_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd) 2625 { 2626 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour 2627 || bfd_get_flavour (obfd) != bfd_target_elf_flavour) 2628 return TRUE; 2629 2630 BFD_ASSERT (!elf_flags_init (obfd) 2631 || elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags); 2632 2633 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags; 2634 elf_flags_init (obfd) = TRUE; 2635 2636 /* Copy object attributes. */ 2637 _bfd_elf_copy_obj_attributes (ibfd, obfd); 2638 2639 return TRUE; 2640 } 2641 2642 2643 static bfd_boolean 2644 lm32_elf_fdpic_copy_private_bfd_data (bfd *ibfd, bfd *obfd) 2645 { 2646 unsigned i; 2647 2648 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour 2649 || bfd_get_flavour (obfd) != bfd_target_elf_flavour) 2650 return TRUE; 2651 2652 if (! lm32_elf_copy_private_bfd_data (ibfd, obfd)) 2653 return FALSE; 2654 2655 if (! elf_tdata (ibfd) || ! elf_tdata (ibfd)->phdr 2656 || ! elf_tdata (obfd) || ! elf_tdata (obfd)->phdr) 2657 return TRUE; 2658 2659 /* Copy the stack size. */ 2660 for (i = 0; i < elf_elfheader (ibfd)->e_phnum; i++) 2661 if (elf_tdata (ibfd)->phdr[i].p_type == PT_GNU_STACK) 2662 { 2663 Elf_Internal_Phdr *iphdr = &elf_tdata (ibfd)->phdr[i]; 2664 2665 for (i = 0; i < elf_elfheader (obfd)->e_phnum; i++) 2666 if (elf_tdata (obfd)->phdr[i].p_type == PT_GNU_STACK) 2667 { 2668 memcpy (&elf_tdata (obfd)->phdr[i], iphdr, sizeof (*iphdr)); 2669 2670 /* Rewrite the phdrs, since we're only called after they were first written. */ 2671 if (bfd_seek (obfd, (bfd_signed_vma) get_elf_backend_data (obfd) 2672 ->s->sizeof_ehdr, SEEK_SET) != 0 2673 || get_elf_backend_data (obfd)->s->write_out_phdrs (obfd, elf_tdata (obfd)->phdr, 2674 elf_elfheader (obfd)->e_phnum) != 0) 2675 return FALSE; 2676 break; 2677 } 2678 2679 break; 2680 } 2681 2682 return TRUE; 2683 } 2684 2685 2686 #define ELF_ARCH bfd_arch_lm32 2687 #define ELF_TARGET_ID LM32_ELF_DATA 2688 #define ELF_MACHINE_CODE EM_LATTICEMICO32 2689 #define ELF_MAXPAGESIZE 0x1000 2690 2691 #define TARGET_BIG_SYM bfd_elf32_lm32_vec 2692 #define TARGET_BIG_NAME "elf32-lm32" 2693 2694 #define bfd_elf32_bfd_reloc_type_lookup lm32_reloc_type_lookup 2695 #define bfd_elf32_bfd_reloc_name_lookup lm32_reloc_name_lookup 2696 #define elf_info_to_howto lm32_info_to_howto_rela 2697 #define elf_info_to_howto_rel 0 2698 #define elf_backend_rela_normal 1 2699 #define elf_backend_object_p lm32_elf_object_p 2700 #define elf_backend_final_write_processing lm32_elf_final_write_processing 2701 #define elf_backend_stack_align 8 2702 #define elf_backend_can_gc_sections 1 2703 #define elf_backend_can_refcount 1 2704 #define elf_backend_gc_mark_hook lm32_elf_gc_mark_hook 2705 #define elf_backend_gc_sweep_hook lm32_elf_gc_sweep_hook 2706 #define elf_backend_plt_readonly 1 2707 #define elf_backend_want_got_plt 1 2708 #define elf_backend_want_plt_sym 0 2709 #define elf_backend_got_header_size 12 2710 #define bfd_elf32_bfd_link_hash_table_create lm32_elf_link_hash_table_create 2711 #define elf_backend_check_relocs lm32_elf_check_relocs 2712 #define elf_backend_reloc_type_class lm32_elf_reloc_type_class 2713 #define elf_backend_copy_indirect_symbol lm32_elf_copy_indirect_symbol 2714 #define elf_backend_size_dynamic_sections lm32_elf_size_dynamic_sections 2715 #define elf_backend_omit_section_dynsym ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true) 2716 #define elf_backend_create_dynamic_sections lm32_elf_create_dynamic_sections 2717 #define elf_backend_finish_dynamic_sections lm32_elf_finish_dynamic_sections 2718 #define elf_backend_adjust_dynamic_symbol lm32_elf_adjust_dynamic_symbol 2719 #define elf_backend_finish_dynamic_symbol lm32_elf_finish_dynamic_symbol 2720 #define elf_backend_relocate_section lm32_elf_relocate_section 2721 2722 #include "elf32-target.h" 2723 2724 #undef ELF_MAXPAGESIZE 2725 #define ELF_MAXPAGESIZE 0x4000 2726 2727 2728 #undef TARGET_BIG_SYM 2729 #define TARGET_BIG_SYM bfd_elf32_lm32fdpic_vec 2730 #undef TARGET_BIG_NAME 2731 #define TARGET_BIG_NAME "elf32-lm32fdpic" 2732 #undef elf32_bed 2733 #define elf32_bed elf32_lm32fdpic_bed 2734 2735 #undef elf_backend_always_size_sections 2736 #define elf_backend_always_size_sections lm32_elf_always_size_sections 2737 #undef bfd_elf32_bfd_copy_private_bfd_data 2738 #define bfd_elf32_bfd_copy_private_bfd_data lm32_elf_fdpic_copy_private_bfd_data 2739 2740 #include "elf32-target.h" 2741