1/* IA-64 support for 64-bit ELF 2 Copyright (C) 1998-2022 Free Software Foundation, Inc. 3 Contributed by David Mosberger-Tang <davidm@hpl.hp.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 "opcode/ia64.h" 27#include "elf/ia64.h" 28#include "objalloc.h" 29#include "hashtab.h" 30#include "elfxx-ia64.h" 31 32#define ARCH_SIZE NN 33 34#if ARCH_SIZE == 64 35#define LOG_SECTION_ALIGN 3 36#endif 37 38#if ARCH_SIZE == 32 39#define LOG_SECTION_ALIGN 2 40#endif 41 42#define is_ia64_elf(bfd) \ 43 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ 44 && elf_object_id (bfd) == IA64_ELF_DATA) 45 46typedef struct bfd_hash_entry *(*new_hash_entry_func) 47 (struct bfd_hash_entry *, struct bfd_hash_table *, const char *); 48 49/* In dynamically (linker-) created sections, we generally need to keep track 50 of the place a symbol or expression got allocated to. This is done via hash 51 tables that store entries of the following type. */ 52 53struct elfNN_ia64_dyn_sym_info 54{ 55 /* The addend for which this entry is relevant. */ 56 bfd_vma addend; 57 58 bfd_vma got_offset; 59 bfd_vma fptr_offset; 60 bfd_vma pltoff_offset; 61 bfd_vma plt_offset; 62 bfd_vma plt2_offset; 63 bfd_vma tprel_offset; 64 bfd_vma dtpmod_offset; 65 bfd_vma dtprel_offset; 66 67 /* The symbol table entry, if any, that this was derived from. */ 68 struct elf_link_hash_entry *h; 69 70 /* Used to count non-got, non-plt relocations for delayed sizing 71 of relocation sections. */ 72 struct elfNN_ia64_dyn_reloc_entry 73 { 74 struct elfNN_ia64_dyn_reloc_entry *next; 75 asection *srel; 76 int type; 77 int count; 78 79 /* Is this reloc against readonly section? */ 80 bool reltext; 81 } *reloc_entries; 82 83 /* TRUE when the section contents have been updated. */ 84 unsigned got_done : 1; 85 unsigned fptr_done : 1; 86 unsigned pltoff_done : 1; 87 unsigned tprel_done : 1; 88 unsigned dtpmod_done : 1; 89 unsigned dtprel_done : 1; 90 91 /* TRUE for the different kinds of linker data we want created. */ 92 unsigned want_got : 1; 93 unsigned want_gotx : 1; 94 unsigned want_fptr : 1; 95 unsigned want_ltoff_fptr : 1; 96 unsigned want_plt : 1; 97 unsigned want_plt2 : 1; 98 unsigned want_pltoff : 1; 99 unsigned want_tprel : 1; 100 unsigned want_dtpmod : 1; 101 unsigned want_dtprel : 1; 102}; 103 104struct elfNN_ia64_local_hash_entry 105{ 106 int id; 107 unsigned int r_sym; 108 /* The number of elements in elfNN_ia64_dyn_sym_info array. */ 109 unsigned int count; 110 /* The number of sorted elements in elfNN_ia64_dyn_sym_info array. */ 111 unsigned int sorted_count; 112 /* The size of elfNN_ia64_dyn_sym_info array. */ 113 unsigned int size; 114 /* The array of elfNN_ia64_dyn_sym_info. */ 115 struct elfNN_ia64_dyn_sym_info *info; 116 117 /* TRUE if this hash entry's addends was translated for 118 SHF_MERGE optimization. */ 119 unsigned sec_merge_done : 1; 120}; 121 122struct elfNN_ia64_link_hash_entry 123{ 124 struct elf_link_hash_entry root; 125 /* The number of elements in elfNN_ia64_dyn_sym_info array. */ 126 unsigned int count; 127 /* The number of sorted elements in elfNN_ia64_dyn_sym_info array. */ 128 unsigned int sorted_count; 129 /* The size of elfNN_ia64_dyn_sym_info array. */ 130 unsigned int size; 131 /* The array of elfNN_ia64_dyn_sym_info. */ 132 struct elfNN_ia64_dyn_sym_info *info; 133}; 134 135struct elfNN_ia64_link_hash_table 136{ 137 /* The main hash table. */ 138 struct elf_link_hash_table root; 139 140 asection *fptr_sec; /* Function descriptor table (or NULL). */ 141 asection *rel_fptr_sec; /* Dynamic relocation section for same. */ 142 asection *pltoff_sec; /* Private descriptors for plt (or NULL). */ 143 asection *rel_pltoff_sec; /* Dynamic relocation section for same. */ 144 145 bfd_size_type minplt_entries; /* Number of minplt entries. */ 146 unsigned self_dtpmod_done : 1;/* Has self DTPMOD entry been finished? */ 147 bfd_vma self_dtpmod_offset; /* .got offset to self DTPMOD entry. */ 148 /* There are maybe R_IA64_GPREL22 relocations, including those 149 optimized from R_IA64_LTOFF22X, against non-SHF_IA_64_SHORT 150 sections. We need to record those sections so that we can choose 151 a proper GP to cover all R_IA64_GPREL22 relocations. */ 152 asection *max_short_sec; /* Maximum short output section. */ 153 bfd_vma max_short_offset; /* Maximum short offset. */ 154 asection *min_short_sec; /* Minimum short output section. */ 155 bfd_vma min_short_offset; /* Minimum short offset. */ 156 157 htab_t loc_hash_table; 158 void *loc_hash_memory; 159}; 160 161struct elfNN_ia64_allocate_data 162{ 163 struct bfd_link_info *info; 164 bfd_size_type ofs; 165 bool only_got; 166}; 167 168#define elfNN_ia64_hash_table(p) \ 169 ((is_elf_hash_table ((p)->hash) \ 170 && elf_hash_table_id (elf_hash_table (p)) == IA64_ELF_DATA) \ 171 ? (struct elfNN_ia64_link_hash_table *) (p)->hash : NULL) 172 173static struct elfNN_ia64_dyn_sym_info * get_dyn_sym_info 174 (struct elfNN_ia64_link_hash_table *ia64_info, 175 struct elf_link_hash_entry *h, 176 bfd *abfd, const Elf_Internal_Rela *rel, bool create); 177static bool elfNN_ia64_dynamic_symbol_p 178 (struct elf_link_hash_entry *h, struct bfd_link_info *info, int); 179static bool elfNN_ia64_choose_gp 180 (bfd *abfd, struct bfd_link_info *info, bool final); 181static void elfNN_ia64_dyn_sym_traverse 182 (struct elfNN_ia64_link_hash_table *ia64_info, 183 bool (*func) (struct elfNN_ia64_dyn_sym_info *, void *), 184 void * info); 185static bool allocate_global_data_got 186 (struct elfNN_ia64_dyn_sym_info *dyn_i, void * data); 187static bool allocate_global_fptr_got 188 (struct elfNN_ia64_dyn_sym_info *dyn_i, void * data); 189static bool allocate_local_got 190 (struct elfNN_ia64_dyn_sym_info *dyn_i, void * data); 191static bool elfNN_ia64_hpux_vec 192 (const bfd_target *vec); 193static bool allocate_dynrel_entries 194 (struct elfNN_ia64_dyn_sym_info *dyn_i, void * data); 195static asection *get_pltoff 196 (bfd *abfd, struct bfd_link_info *info, 197 struct elfNN_ia64_link_hash_table *ia64_info); 198 199/* ia64-specific relocation. */ 200 201/* Given a ELF reloc, return the matching HOWTO structure. */ 202 203static bool 204elfNN_ia64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, 205 arelent *bfd_reloc, 206 Elf_Internal_Rela *elf_reloc) 207{ 208 unsigned int r_type = ELF32_R_TYPE (elf_reloc->r_info); 209 210 bfd_reloc->howto = ia64_elf_lookup_howto (r_type); 211 if (bfd_reloc->howto == NULL) 212 { 213 /* xgettext:c-format */ 214 _bfd_error_handler (_("%pB: unsupported relocation type %#x"), 215 abfd, r_type); 216 bfd_set_error (bfd_error_bad_value); 217 return false; 218 } 219 220 return true; 221} 222 223#define PLT_HEADER_SIZE (3 * 16) 224#define PLT_MIN_ENTRY_SIZE (1 * 16) 225#define PLT_FULL_ENTRY_SIZE (2 * 16) 226#define PLT_RESERVED_WORDS 3 227 228static const bfd_byte plt_header[PLT_HEADER_SIZE] = 229{ 230 0x0b, 0x10, 0x00, 0x1c, 0x00, 0x21, /* [MMI] mov r2=r14;; */ 231 0xe0, 0x00, 0x08, 0x00, 0x48, 0x00, /* addl r14=0,r2 */ 232 0x00, 0x00, 0x04, 0x00, /* nop.i 0x0;; */ 233 0x0b, 0x80, 0x20, 0x1c, 0x18, 0x14, /* [MMI] ld8 r16=[r14],8;; */ 234 0x10, 0x41, 0x38, 0x30, 0x28, 0x00, /* ld8 r17=[r14],8 */ 235 0x00, 0x00, 0x04, 0x00, /* nop.i 0x0;; */ 236 0x11, 0x08, 0x00, 0x1c, 0x18, 0x10, /* [MIB] ld8 r1=[r14] */ 237 0x60, 0x88, 0x04, 0x80, 0x03, 0x00, /* mov b6=r17 */ 238 0x60, 0x00, 0x80, 0x00 /* br.few b6;; */ 239}; 240 241static const bfd_byte plt_min_entry[PLT_MIN_ENTRY_SIZE] = 242{ 243 0x11, 0x78, 0x00, 0x00, 0x00, 0x24, /* [MIB] mov r15=0 */ 244 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, /* nop.i 0x0 */ 245 0x00, 0x00, 0x00, 0x40 /* br.few 0 <PLT0>;; */ 246}; 247 248static const bfd_byte plt_full_entry[PLT_FULL_ENTRY_SIZE] = 249{ 250 0x0b, 0x78, 0x00, 0x02, 0x00, 0x24, /* [MMI] addl r15=0,r1;; */ 251 0x00, 0x41, 0x3c, 0x70, 0x29, 0xc0, /* ld8.acq r16=[r15],8*/ 252 0x01, 0x08, 0x00, 0x84, /* mov r14=r1;; */ 253 0x11, 0x08, 0x00, 0x1e, 0x18, 0x10, /* [MIB] ld8 r1=[r15] */ 254 0x60, 0x80, 0x04, 0x80, 0x03, 0x00, /* mov b6=r16 */ 255 0x60, 0x00, 0x80, 0x00 /* br.few b6;; */ 256}; 257 258#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" 259 260static const bfd_byte oor_brl[16] = 261{ 262 0x05, 0x00, 0x00, 0x00, 0x01, 0x00, /* [MLX] nop.m 0 */ 263 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* brl.sptk.few tgt;; */ 264 0x00, 0x00, 0x00, 0xc0 265}; 266 267static const bfd_byte oor_ip[48] = 268{ 269 0x04, 0x00, 0x00, 0x00, 0x01, 0x00, /* [MLX] nop.m 0 */ 270 0x00, 0x00, 0x00, 0x00, 0x00, 0xe0, /* movl r15=0 */ 271 0x01, 0x00, 0x00, 0x60, 272 0x03, 0x00, 0x00, 0x00, 0x01, 0x00, /* [MII] nop.m 0 */ 273 0x00, 0x01, 0x00, 0x60, 0x00, 0x00, /* mov r16=ip;; */ 274 0xf2, 0x80, 0x00, 0x80, /* add r16=r15,r16;; */ 275 0x11, 0x00, 0x00, 0x00, 0x01, 0x00, /* [MIB] nop.m 0 */ 276 0x60, 0x80, 0x04, 0x80, 0x03, 0x00, /* mov b6=r16 */ 277 0x60, 0x00, 0x80, 0x00 /* br b6;; */ 278}; 279 280static size_t oor_branch_size = sizeof (oor_brl); 281 282void 283bfd_elfNN_ia64_after_parse (int itanium) 284{ 285 oor_branch_size = itanium ? sizeof (oor_ip) : sizeof (oor_brl); 286} 287 288 289/* Rename some of the generic section flags to better document how they 290 are used here. */ 291#define skip_relax_pass_0 sec_flg0 292#define skip_relax_pass_1 sec_flg1 293 294/* These functions do relaxation for IA-64 ELF. */ 295 296static void 297elfNN_ia64_update_short_info (asection *sec, bfd_vma offset, 298 struct elfNN_ia64_link_hash_table *ia64_info) 299{ 300 /* Skip ABS and SHF_IA_64_SHORT sections. */ 301 if (sec == bfd_abs_section_ptr 302 || (sec->flags & SEC_SMALL_DATA) != 0) 303 return; 304 305 if (!ia64_info->min_short_sec) 306 { 307 ia64_info->max_short_sec = sec; 308 ia64_info->max_short_offset = offset; 309 ia64_info->min_short_sec = sec; 310 ia64_info->min_short_offset = offset; 311 } 312 else if (sec == ia64_info->max_short_sec 313 && offset > ia64_info->max_short_offset) 314 ia64_info->max_short_offset = offset; 315 else if (sec == ia64_info->min_short_sec 316 && offset < ia64_info->min_short_offset) 317 ia64_info->min_short_offset = offset; 318 else if (sec->output_section->vma 319 > ia64_info->max_short_sec->vma) 320 { 321 ia64_info->max_short_sec = sec; 322 ia64_info->max_short_offset = offset; 323 } 324 else if (sec->output_section->vma 325 < ia64_info->min_short_sec->vma) 326 { 327 ia64_info->min_short_sec = sec; 328 ia64_info->min_short_offset = offset; 329 } 330} 331 332static bool 333elfNN_ia64_relax_section (bfd *abfd, asection *sec, 334 struct bfd_link_info *link_info, 335 bool *again) 336{ 337 struct one_fixup 338 { 339 struct one_fixup *next; 340 asection *tsec; 341 bfd_vma toff; 342 bfd_vma trampoff; 343 }; 344 345 Elf_Internal_Shdr *symtab_hdr; 346 Elf_Internal_Rela *internal_relocs; 347 Elf_Internal_Rela *irel, *irelend; 348 bfd_byte *contents; 349 Elf_Internal_Sym *isymbuf = NULL; 350 struct elfNN_ia64_link_hash_table *ia64_info; 351 struct one_fixup *fixups = NULL; 352 bool changed_contents = false; 353 bool changed_relocs = false; 354 bool changed_got = false; 355 bool skip_relax_pass_0 = true; 356 bool skip_relax_pass_1 = true; 357 bfd_vma gp = 0; 358 359 /* Assume we're not going to change any sizes, and we'll only need 360 one pass. */ 361 *again = false; 362 363 if (bfd_link_relocatable (link_info)) 364 (*link_info->callbacks->einfo) 365 (_("%P%F: --relax and -r may not be used together\n")); 366 367 /* Don't even try to relax for non-ELF outputs. */ 368 if (!is_elf_hash_table (link_info->hash)) 369 return false; 370 371 /* Nothing to do if there are no relocations or there is no need for 372 the current pass. */ 373 if ((sec->flags & SEC_RELOC) == 0 374 || sec->reloc_count == 0 375 || (link_info->relax_pass == 0 && sec->skip_relax_pass_0) 376 || (link_info->relax_pass == 1 && sec->skip_relax_pass_1)) 377 return true; 378 379 ia64_info = elfNN_ia64_hash_table (link_info); 380 if (ia64_info == NULL) 381 return false; 382 383 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 384 385 /* Load the relocations for this section. */ 386 internal_relocs = (_bfd_elf_link_read_relocs 387 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL, 388 link_info->keep_memory)); 389 if (internal_relocs == NULL) 390 return false; 391 392 irelend = internal_relocs + sec->reloc_count; 393 394 /* Get the section contents. */ 395 if (elf_section_data (sec)->this_hdr.contents != NULL) 396 contents = elf_section_data (sec)->this_hdr.contents; 397 else 398 { 399 if (!bfd_malloc_and_get_section (abfd, sec, &contents)) 400 goto error_return; 401 } 402 403 for (irel = internal_relocs; irel < irelend; irel++) 404 { 405 unsigned long r_type = ELFNN_R_TYPE (irel->r_info); 406 bfd_vma symaddr, reladdr, trampoff, toff, roff; 407 asection *tsec; 408 struct one_fixup *f; 409 bfd_size_type amt; 410 bool is_branch; 411 struct elfNN_ia64_dyn_sym_info *dyn_i; 412 char symtype; 413 414 switch (r_type) 415 { 416 case R_IA64_PCREL21B: 417 case R_IA64_PCREL21BI: 418 case R_IA64_PCREL21M: 419 case R_IA64_PCREL21F: 420 /* In pass 1, all br relaxations are done. We can skip it. */ 421 if (link_info->relax_pass == 1) 422 continue; 423 skip_relax_pass_0 = false; 424 is_branch = true; 425 break; 426 427 case R_IA64_PCREL60B: 428 /* We can't optimize brl to br in pass 0 since br relaxations 429 will increase the code size. Defer it to pass 1. */ 430 if (link_info->relax_pass == 0) 431 { 432 skip_relax_pass_1 = false; 433 continue; 434 } 435 is_branch = true; 436 break; 437 438 case R_IA64_GPREL22: 439 /* Update max_short_sec/min_short_sec. */ 440 441 case R_IA64_LTOFF22X: 442 case R_IA64_LDXMOV: 443 /* We can't relax ldx/mov in pass 0 since br relaxations will 444 increase the code size. Defer it to pass 1. */ 445 if (link_info->relax_pass == 0) 446 { 447 skip_relax_pass_1 = false; 448 continue; 449 } 450 is_branch = false; 451 break; 452 453 default: 454 continue; 455 } 456 457 /* Get the value of the symbol referred to by the reloc. */ 458 if (ELFNN_R_SYM (irel->r_info) < symtab_hdr->sh_info) 459 { 460 /* A local symbol. */ 461 Elf_Internal_Sym *isym; 462 463 /* Read this BFD's local symbols. */ 464 if (isymbuf == NULL) 465 { 466 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; 467 if (isymbuf == NULL) 468 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, 469 symtab_hdr->sh_info, 0, 470 NULL, NULL, NULL); 471 if (isymbuf == 0) 472 goto error_return; 473 } 474 475 isym = isymbuf + ELFNN_R_SYM (irel->r_info); 476 if (isym->st_shndx == SHN_UNDEF) 477 continue; /* We can't do anything with undefined symbols. */ 478 else if (isym->st_shndx == SHN_ABS) 479 tsec = bfd_abs_section_ptr; 480 else if (isym->st_shndx == SHN_COMMON) 481 tsec = bfd_com_section_ptr; 482 else if (isym->st_shndx == SHN_IA_64_ANSI_COMMON) 483 tsec = bfd_com_section_ptr; 484 else 485 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx); 486 487 toff = isym->st_value; 488 dyn_i = get_dyn_sym_info (ia64_info, NULL, abfd, irel, false); 489 symtype = ELF_ST_TYPE (isym->st_info); 490 } 491 else 492 { 493 unsigned long indx; 494 struct elf_link_hash_entry *h; 495 496 indx = ELFNN_R_SYM (irel->r_info) - symtab_hdr->sh_info; 497 h = elf_sym_hashes (abfd)[indx]; 498 BFD_ASSERT (h != NULL); 499 500 while (h->root.type == bfd_link_hash_indirect 501 || h->root.type == bfd_link_hash_warning) 502 h = (struct elf_link_hash_entry *) h->root.u.i.link; 503 504 dyn_i = get_dyn_sym_info (ia64_info, h, abfd, irel, false); 505 506 /* For branches to dynamic symbols, we're interested instead 507 in a branch to the PLT entry. */ 508 if (is_branch && dyn_i && dyn_i->want_plt2) 509 { 510 /* Internal branches shouldn't be sent to the PLT. 511 Leave this for now and we'll give an error later. */ 512 if (r_type != R_IA64_PCREL21B) 513 continue; 514 515 tsec = ia64_info->root.splt; 516 toff = dyn_i->plt2_offset; 517 BFD_ASSERT (irel->r_addend == 0); 518 } 519 520 /* Can't do anything else with dynamic symbols. */ 521 else if (elfNN_ia64_dynamic_symbol_p (h, link_info, r_type)) 522 continue; 523 524 else 525 { 526 /* We can't do anything with undefined symbols. */ 527 if (h->root.type == bfd_link_hash_undefined 528 || h->root.type == bfd_link_hash_undefweak) 529 continue; 530 531 tsec = h->root.u.def.section; 532 toff = h->root.u.def.value; 533 } 534 535 symtype = h->type; 536 } 537 538 if (tsec->sec_info_type == SEC_INFO_TYPE_MERGE) 539 { 540 /* At this stage in linking, no SEC_MERGE symbol has been 541 adjusted, so all references to such symbols need to be 542 passed through _bfd_merged_section_offset. (Later, in 543 relocate_section, all SEC_MERGE symbols *except* for 544 section symbols have been adjusted.) 545 546 gas may reduce relocations against symbols in SEC_MERGE 547 sections to a relocation against the section symbol when 548 the original addend was zero. When the reloc is against 549 a section symbol we should include the addend in the 550 offset passed to _bfd_merged_section_offset, since the 551 location of interest is the original symbol. On the 552 other hand, an access to "sym+addend" where "sym" is not 553 a section symbol should not include the addend; Such an 554 access is presumed to be an offset from "sym"; The 555 location of interest is just "sym". */ 556 if (symtype == STT_SECTION) 557 toff += irel->r_addend; 558 559 toff = _bfd_merged_section_offset (abfd, &tsec, 560 elf_section_data (tsec)->sec_info, 561 toff); 562 563 if (symtype != STT_SECTION) 564 toff += irel->r_addend; 565 } 566 else 567 toff += irel->r_addend; 568 569 symaddr = tsec->output_section->vma + tsec->output_offset + toff; 570 571 roff = irel->r_offset; 572 573 if (is_branch) 574 { 575 bfd_signed_vma offset; 576 577 reladdr = (sec->output_section->vma 578 + sec->output_offset 579 + roff) & (bfd_vma) -4; 580 581 /* The .plt section is aligned at 32byte and the .text section 582 is aligned at 64byte. The .text section is right after the 583 .plt section. After the first relaxation pass, linker may 584 increase the gap between the .plt and .text sections up 585 to 32byte. We assume linker will always insert 32byte 586 between the .plt and .text sections after the first 587 relaxation pass. */ 588 if (tsec == ia64_info->root.splt) 589 offset = -0x1000000 + 32; 590 else 591 offset = -0x1000000; 592 593 /* If the branch is in range, no need to do anything. */ 594 if ((bfd_signed_vma) (symaddr - reladdr) >= offset 595 && (bfd_signed_vma) (symaddr - reladdr) <= 0x0FFFFF0) 596 { 597 /* If the 60-bit branch is in 21-bit range, optimize it. */ 598 if (r_type == R_IA64_PCREL60B) 599 { 600 ia64_elf_relax_brl (contents, roff); 601 602 irel->r_info 603 = ELFNN_R_INFO (ELFNN_R_SYM (irel->r_info), 604 R_IA64_PCREL21B); 605 606 /* If the original relocation offset points to slot 607 1, change it to slot 2. */ 608 if ((irel->r_offset & 3) == 1) 609 irel->r_offset += 1; 610 611 changed_contents = true; 612 changed_relocs = true; 613 } 614 615 continue; 616 } 617 else if (r_type == R_IA64_PCREL60B) 618 continue; 619 else if (ia64_elf_relax_br (contents, roff)) 620 { 621 irel->r_info 622 = ELFNN_R_INFO (ELFNN_R_SYM (irel->r_info), 623 R_IA64_PCREL60B); 624 625 /* Make the relocation offset point to slot 1. */ 626 irel->r_offset = (irel->r_offset & ~((bfd_vma) 0x3)) + 1; 627 628 changed_contents = true; 629 changed_relocs = true; 630 continue; 631 } 632 633 /* We can't put a trampoline in a .init/.fini section. Issue 634 an error. */ 635 if (strcmp (sec->output_section->name, ".init") == 0 636 || strcmp (sec->output_section->name, ".fini") == 0) 637 { 638 _bfd_error_handler 639 /* xgettext:c-format */ 640 (_("%pB: can't relax br at %#" PRIx64 " in section `%pA';" 641 " please use brl or indirect branch"), 642 sec->owner, (uint64_t) roff, sec); 643 bfd_set_error (bfd_error_bad_value); 644 goto error_return; 645 } 646 647 /* If the branch and target are in the same section, you've 648 got one honking big section and we can't help you unless 649 you are branching backwards. You'll get an error message 650 later. */ 651 if (tsec == sec && toff > roff) 652 continue; 653 654 /* Look for an existing fixup to this address. */ 655 for (f = fixups; f ; f = f->next) 656 if (f->tsec == tsec && f->toff == toff) 657 break; 658 659 if (f == NULL) 660 { 661 /* Two alternatives: If it's a branch to a PLT entry, we can 662 make a copy of the FULL_PLT entry. Otherwise, we'll have 663 to use a `brl' insn to get where we're going. */ 664 665 size_t size; 666 667 if (tsec == ia64_info->root.splt) 668 size = sizeof (plt_full_entry); 669 else 670 size = oor_branch_size; 671 672 /* Resize the current section to make room for the new branch. */ 673 trampoff = (sec->size + 15) & (bfd_vma) -16; 674 675 /* If trampoline is out of range, there is nothing we 676 can do. */ 677 offset = trampoff - (roff & (bfd_vma) -4); 678 if (offset < -0x1000000 || offset > 0x0FFFFF0) 679 continue; 680 681 amt = trampoff + size; 682 contents = (bfd_byte *) bfd_realloc (contents, amt); 683 if (contents == NULL) 684 goto error_return; 685 sec->size = amt; 686 687 if (tsec == ia64_info->root.splt) 688 { 689 memcpy (contents + trampoff, plt_full_entry, size); 690 691 /* Hijack the old relocation for use as the PLTOFF reloc. */ 692 irel->r_info = ELFNN_R_INFO (ELFNN_R_SYM (irel->r_info), 693 R_IA64_PLTOFF22); 694 irel->r_offset = trampoff; 695 } 696 else 697 { 698 if (size == sizeof (oor_ip)) 699 { 700 memcpy (contents + trampoff, oor_ip, size); 701 irel->r_info = ELFNN_R_INFO (ELFNN_R_SYM (irel->r_info), 702 R_IA64_PCREL64I); 703 irel->r_addend -= 16; 704 irel->r_offset = trampoff + 2; 705 } 706 else 707 { 708 memcpy (contents + trampoff, oor_brl, size); 709 irel->r_info = ELFNN_R_INFO (ELFNN_R_SYM (irel->r_info), 710 R_IA64_PCREL60B); 711 irel->r_offset = trampoff + 2; 712 } 713 714 } 715 716 /* Record the fixup so we don't do it again this section. */ 717 f = (struct one_fixup *) 718 bfd_malloc ((bfd_size_type) sizeof (*f)); 719 f->next = fixups; 720 f->tsec = tsec; 721 f->toff = toff; 722 f->trampoff = trampoff; 723 fixups = f; 724 } 725 else 726 { 727 /* If trampoline is out of range, there is nothing we 728 can do. */ 729 offset = f->trampoff - (roff & (bfd_vma) -4); 730 if (offset < -0x1000000 || offset > 0x0FFFFF0) 731 continue; 732 733 /* Nop out the reloc, since we're finalizing things here. */ 734 irel->r_info = ELFNN_R_INFO (0, R_IA64_NONE); 735 } 736 737 /* Fix up the existing branch to hit the trampoline. */ 738 if (ia64_elf_install_value (contents + roff, offset, r_type) 739 != bfd_reloc_ok) 740 goto error_return; 741 742 changed_contents = true; 743 changed_relocs = true; 744 } 745 else 746 { 747 /* Fetch the gp. */ 748 if (gp == 0) 749 { 750 bfd *obfd = sec->output_section->owner; 751 gp = _bfd_get_gp_value (obfd); 752 if (gp == 0) 753 { 754 if (!elfNN_ia64_choose_gp (obfd, link_info, false)) 755 goto error_return; 756 gp = _bfd_get_gp_value (obfd); 757 } 758 } 759 760 /* If the data is out of range, do nothing. */ 761 if ((bfd_signed_vma) (symaddr - gp) >= 0x200000 762 ||(bfd_signed_vma) (symaddr - gp) < -0x200000) 763 continue; 764 765 if (r_type == R_IA64_GPREL22) 766 elfNN_ia64_update_short_info (tsec->output_section, 767 tsec->output_offset + toff, 768 ia64_info); 769 else if (r_type == R_IA64_LTOFF22X) 770 { 771 irel->r_info = ELFNN_R_INFO (ELFNN_R_SYM (irel->r_info), 772 R_IA64_GPREL22); 773 changed_relocs = true; 774 if (dyn_i->want_gotx) 775 { 776 dyn_i->want_gotx = 0; 777 changed_got |= !dyn_i->want_got; 778 } 779 780 elfNN_ia64_update_short_info (tsec->output_section, 781 tsec->output_offset + toff, 782 ia64_info); 783 } 784 else 785 { 786 ia64_elf_relax_ldxmov (contents, roff); 787 irel->r_info = ELFNN_R_INFO (0, R_IA64_NONE); 788 changed_contents = true; 789 changed_relocs = true; 790 } 791 } 792 } 793 794 /* ??? If we created fixups, this may push the code segment large 795 enough that the data segment moves, which will change the GP. 796 Reset the GP so that we re-calculate next round. We need to 797 do this at the _beginning_ of the next round; now will not do. */ 798 799 /* Clean up and go home. */ 800 while (fixups) 801 { 802 struct one_fixup *f = fixups; 803 fixups = fixups->next; 804 free (f); 805 } 806 807 if (isymbuf != NULL 808 && symtab_hdr->contents != (unsigned char *) isymbuf) 809 { 810 if (! link_info->keep_memory) 811 free (isymbuf); 812 else 813 { 814 /* Cache the symbols for elf_link_input_bfd. */ 815 symtab_hdr->contents = (unsigned char *) isymbuf; 816 } 817 } 818 819 if (contents != NULL 820 && elf_section_data (sec)->this_hdr.contents != contents) 821 { 822 if (!changed_contents && !link_info->keep_memory) 823 free (contents); 824 else 825 { 826 /* Cache the section contents for elf_link_input_bfd. */ 827 elf_section_data (sec)->this_hdr.contents = contents; 828 } 829 } 830 831 if (elf_section_data (sec)->relocs != internal_relocs) 832 { 833 if (!changed_relocs) 834 free (internal_relocs); 835 else 836 elf_section_data (sec)->relocs = internal_relocs; 837 } 838 839 if (changed_got) 840 { 841 struct elfNN_ia64_allocate_data data; 842 data.info = link_info; 843 data.ofs = 0; 844 ia64_info->self_dtpmod_offset = (bfd_vma) -1; 845 846 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_global_data_got, &data); 847 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_global_fptr_got, &data); 848 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_local_got, &data); 849 ia64_info->root.sgot->size = data.ofs; 850 851 if (ia64_info->root.dynamic_sections_created 852 && ia64_info->root.srelgot != NULL) 853 { 854 /* Resize .rela.got. */ 855 ia64_info->root.srelgot->size = 0; 856 if (bfd_link_pic (link_info) 857 && ia64_info->self_dtpmod_offset != (bfd_vma) -1) 858 ia64_info->root.srelgot->size += sizeof (ElfNN_External_Rela); 859 data.only_got = true; 860 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_dynrel_entries, 861 &data); 862 } 863 } 864 865 if (link_info->relax_pass == 0) 866 { 867 /* Pass 0 is only needed to relax br. */ 868 sec->skip_relax_pass_0 = skip_relax_pass_0; 869 sec->skip_relax_pass_1 = skip_relax_pass_1; 870 } 871 872 *again = changed_contents || changed_relocs; 873 return true; 874 875 error_return: 876 if ((unsigned char *) isymbuf != symtab_hdr->contents) 877 free (isymbuf); 878 if (elf_section_data (sec)->this_hdr.contents != contents) 879 free (contents); 880 if (elf_section_data (sec)->relocs != internal_relocs) 881 free (internal_relocs); 882 return false; 883} 884#undef skip_relax_pass_0 885#undef skip_relax_pass_1 886 887/* Return TRUE if NAME is an unwind table section name. */ 888 889static inline bool 890is_unwind_section_name (bfd *abfd, const char *name) 891{ 892 if (elfNN_ia64_hpux_vec (abfd->xvec) 893 && !strcmp (name, ELF_STRING_ia64_unwind_hdr)) 894 return false; 895 896 return ((startswith (name, ELF_STRING_ia64_unwind) 897 && ! startswith (name, ELF_STRING_ia64_unwind_info)) 898 || startswith (name, ELF_STRING_ia64_unwind_once)); 899} 900 901/* Handle an IA-64 specific section when reading an object file. This 902 is called when bfd_section_from_shdr finds a section with an unknown 903 type. */ 904 905static bool 906elfNN_ia64_section_from_shdr (bfd *abfd, 907 Elf_Internal_Shdr *hdr, 908 const char *name, 909 int shindex) 910{ 911 /* There ought to be a place to keep ELF backend specific flags, but 912 at the moment there isn't one. We just keep track of the 913 sections by their name, instead. Fortunately, the ABI gives 914 suggested names for all the MIPS specific sections, so we will 915 probably get away with this. */ 916 switch (hdr->sh_type) 917 { 918 case SHT_IA_64_UNWIND: 919 case SHT_IA_64_HP_OPT_ANOT: 920 break; 921 922 case SHT_IA_64_EXT: 923 if (strcmp (name, ELF_STRING_ia64_archext) != 0) 924 return false; 925 break; 926 927 default: 928 return false; 929 } 930 931 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) 932 return false; 933 934 return true; 935} 936 937/* Convert IA-64 specific section flags to bfd internal section flags. */ 938 939/* ??? There is no bfd internal flag equivalent to the SHF_IA_64_NORECOV 940 flag. */ 941 942static bool 943elfNN_ia64_section_flags (const Elf_Internal_Shdr *hdr) 944{ 945 if (hdr->sh_flags & SHF_IA_64_SHORT) 946 hdr->bfd_section->flags |= SEC_SMALL_DATA; 947 948 return true; 949} 950 951/* Set the correct type for an IA-64 ELF section. We do this by the 952 section name, which is a hack, but ought to work. */ 953 954static bool 955elfNN_ia64_fake_sections (bfd *abfd, Elf_Internal_Shdr *hdr, 956 asection *sec) 957{ 958 const char *name; 959 960 name = bfd_section_name (sec); 961 962 if (is_unwind_section_name (abfd, name)) 963 { 964 /* We don't have the sections numbered at this point, so sh_info 965 is set later, in elfNN_ia64_final_write_processing. */ 966 hdr->sh_type = SHT_IA_64_UNWIND; 967 hdr->sh_flags |= SHF_LINK_ORDER; 968 } 969 else if (strcmp (name, ELF_STRING_ia64_archext) == 0) 970 hdr->sh_type = SHT_IA_64_EXT; 971 else if (strcmp (name, ".HP.opt_annot") == 0) 972 hdr->sh_type = SHT_IA_64_HP_OPT_ANOT; 973 else if (strcmp (name, ".reloc") == 0) 974 /* This is an ugly, but unfortunately necessary hack that is 975 needed when producing EFI binaries on IA-64. It tells 976 elf.c:elf_fake_sections() not to consider ".reloc" as a section 977 containing ELF relocation info. We need this hack in order to 978 be able to generate ELF binaries that can be translated into 979 EFI applications (which are essentially COFF objects). Those 980 files contain a COFF ".reloc" section inside an ELFNN object, 981 which would normally cause BFD to segfault because it would 982 attempt to interpret this section as containing relocation 983 entries for section "oc". With this hack enabled, ".reloc" 984 will be treated as a normal data section, which will avoid the 985 segfault. However, you won't be able to create an ELFNN binary 986 with a section named "oc" that needs relocations, but that's 987 the kind of ugly side-effects you get when detecting section 988 types based on their names... In practice, this limitation is 989 unlikely to bite. */ 990 hdr->sh_type = SHT_PROGBITS; 991 992 if (sec->flags & SEC_SMALL_DATA) 993 hdr->sh_flags |= SHF_IA_64_SHORT; 994 995 /* Some HP linkers look for the SHF_IA_64_HP_TLS flag instead of SHF_TLS. */ 996 997 if (elfNN_ia64_hpux_vec (abfd->xvec) && (sec->flags & SHF_TLS)) 998 hdr->sh_flags |= SHF_IA_64_HP_TLS; 999 1000 return true; 1001} 1002 1003/* The final processing done just before writing out an IA-64 ELF 1004 object file. */ 1005 1006static bool 1007elfNN_ia64_final_write_processing (bfd *abfd) 1008{ 1009 Elf_Internal_Shdr *hdr; 1010 asection *s; 1011 1012 for (s = abfd->sections; s; s = s->next) 1013 { 1014 hdr = &elf_section_data (s)->this_hdr; 1015 switch (hdr->sh_type) 1016 { 1017 case SHT_IA_64_UNWIND: 1018 /* The IA-64 processor-specific ABI requires setting sh_link 1019 to the unwind section, whereas HP-UX requires sh_info to 1020 do so. For maximum compatibility, we'll set both for 1021 now... */ 1022 hdr->sh_info = hdr->sh_link; 1023 break; 1024 } 1025 } 1026 1027 if (! elf_flags_init (abfd)) 1028 { 1029 unsigned long flags = 0; 1030 1031 if (abfd->xvec->byteorder == BFD_ENDIAN_BIG) 1032 flags |= EF_IA_64_BE; 1033 if (bfd_get_mach (abfd) == bfd_mach_ia64_elf64) 1034 flags |= EF_IA_64_ABI64; 1035 1036 elf_elfheader(abfd)->e_flags = flags; 1037 elf_flags_init (abfd) = true; 1038 } 1039 return _bfd_elf_final_write_processing (abfd); 1040} 1041 1042/* Hook called by the linker routine which adds symbols from an object 1043 file. We use it to put .comm items in .sbss, and not .bss. */ 1044 1045static bool 1046elfNN_ia64_add_symbol_hook (bfd *abfd, 1047 struct bfd_link_info *info, 1048 Elf_Internal_Sym *sym, 1049 const char **namep ATTRIBUTE_UNUSED, 1050 flagword *flagsp ATTRIBUTE_UNUSED, 1051 asection **secp, 1052 bfd_vma *valp) 1053{ 1054 if (sym->st_shndx == SHN_COMMON 1055 && !bfd_link_relocatable (info) 1056 && sym->st_size <= elf_gp_size (abfd)) 1057 { 1058 /* Common symbols less than or equal to -G nn bytes are 1059 automatically put into .sbss. */ 1060 1061 asection *scomm = bfd_get_section_by_name (abfd, ".scommon"); 1062 1063 if (scomm == NULL) 1064 { 1065 scomm = bfd_make_section_with_flags (abfd, ".scommon", 1066 (SEC_ALLOC 1067 | SEC_IS_COMMON 1068 | SEC_SMALL_DATA 1069 | SEC_LINKER_CREATED)); 1070 if (scomm == NULL) 1071 return false; 1072 } 1073 1074 *secp = scomm; 1075 *valp = sym->st_size; 1076 } 1077 1078 return true; 1079} 1080 1081/* Return the number of additional phdrs we will need. */ 1082 1083static int 1084elfNN_ia64_additional_program_headers (bfd *abfd, 1085 struct bfd_link_info *info ATTRIBUTE_UNUSED) 1086{ 1087 asection *s; 1088 int ret = 0; 1089 1090 /* See if we need a PT_IA_64_ARCHEXT segment. */ 1091 s = bfd_get_section_by_name (abfd, ELF_STRING_ia64_archext); 1092 if (s && (s->flags & SEC_LOAD)) 1093 ++ret; 1094 1095 /* Count how many PT_IA_64_UNWIND segments we need. */ 1096 for (s = abfd->sections; s; s = s->next) 1097 if (is_unwind_section_name (abfd, s->name) && (s->flags & SEC_LOAD)) 1098 ++ret; 1099 1100 return ret; 1101} 1102 1103static bool 1104elfNN_ia64_modify_segment_map (bfd *abfd, 1105 struct bfd_link_info *info ATTRIBUTE_UNUSED) 1106{ 1107 struct elf_segment_map *m, **pm; 1108 Elf_Internal_Shdr *hdr; 1109 asection *s; 1110 1111 /* If we need a PT_IA_64_ARCHEXT segment, it must come before 1112 all PT_LOAD segments. */ 1113 s = bfd_get_section_by_name (abfd, ELF_STRING_ia64_archext); 1114 if (s && (s->flags & SEC_LOAD)) 1115 { 1116 for (m = elf_seg_map (abfd); m != NULL; m = m->next) 1117 if (m->p_type == PT_IA_64_ARCHEXT) 1118 break; 1119 if (m == NULL) 1120 { 1121 m = ((struct elf_segment_map *) 1122 bfd_zalloc (abfd, (bfd_size_type) sizeof *m)); 1123 if (m == NULL) 1124 return false; 1125 1126 m->p_type = PT_IA_64_ARCHEXT; 1127 m->count = 1; 1128 m->sections[0] = s; 1129 1130 /* We want to put it after the PHDR and INTERP segments. */ 1131 pm = &elf_seg_map (abfd); 1132 while (*pm != NULL 1133 && ((*pm)->p_type == PT_PHDR 1134 || (*pm)->p_type == PT_INTERP)) 1135 pm = &(*pm)->next; 1136 1137 m->next = *pm; 1138 *pm = m; 1139 } 1140 } 1141 1142 /* Install PT_IA_64_UNWIND segments, if needed. */ 1143 for (s = abfd->sections; s; s = s->next) 1144 { 1145 hdr = &elf_section_data (s)->this_hdr; 1146 if (hdr->sh_type != SHT_IA_64_UNWIND) 1147 continue; 1148 1149 if (s && (s->flags & SEC_LOAD)) 1150 { 1151 for (m = elf_seg_map (abfd); m != NULL; m = m->next) 1152 if (m->p_type == PT_IA_64_UNWIND) 1153 { 1154 int i; 1155 1156 /* Look through all sections in the unwind segment 1157 for a match since there may be multiple sections 1158 to a segment. */ 1159 for (i = m->count - 1; i >= 0; --i) 1160 if (m->sections[i] == s) 1161 break; 1162 1163 if (i >= 0) 1164 break; 1165 } 1166 1167 if (m == NULL) 1168 { 1169 m = ((struct elf_segment_map *) 1170 bfd_zalloc (abfd, (bfd_size_type) sizeof *m)); 1171 if (m == NULL) 1172 return false; 1173 1174 m->p_type = PT_IA_64_UNWIND; 1175 m->count = 1; 1176 m->sections[0] = s; 1177 m->next = NULL; 1178 1179 /* We want to put it last. */ 1180 pm = &elf_seg_map (abfd); 1181 while (*pm != NULL) 1182 pm = &(*pm)->next; 1183 *pm = m; 1184 } 1185 } 1186 } 1187 1188 return true; 1189} 1190 1191/* Turn on PF_IA_64_NORECOV if needed. This involves traversing all of 1192 the input sections for each output section in the segment and testing 1193 for SHF_IA_64_NORECOV on each. */ 1194 1195static bool 1196elfNN_ia64_modify_headers (bfd *abfd, struct bfd_link_info *info) 1197{ 1198 struct elf_obj_tdata *tdata = elf_tdata (abfd); 1199 struct elf_segment_map *m; 1200 Elf_Internal_Phdr *p; 1201 1202 for (p = tdata->phdr, m = elf_seg_map (abfd); m != NULL; m = m->next, p++) 1203 if (m->p_type == PT_LOAD) 1204 { 1205 int i; 1206 for (i = m->count - 1; i >= 0; --i) 1207 { 1208 struct bfd_link_order *order = m->sections[i]->map_head.link_order; 1209 1210 while (order != NULL) 1211 { 1212 if (order->type == bfd_indirect_link_order) 1213 { 1214 asection *is = order->u.indirect.section; 1215 bfd_vma flags = elf_section_data(is)->this_hdr.sh_flags; 1216 if (flags & SHF_IA_64_NORECOV) 1217 { 1218 p->p_flags |= PF_IA_64_NORECOV; 1219 goto found; 1220 } 1221 } 1222 order = order->next; 1223 } 1224 } 1225 found:; 1226 } 1227 1228 return _bfd_elf_modify_headers (abfd, info); 1229} 1230 1231/* According to the Tahoe assembler spec, all labels starting with a 1232 '.' are local. */ 1233 1234static bool 1235elfNN_ia64_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED, 1236 const char *name) 1237{ 1238 return name[0] == '.'; 1239} 1240 1241/* Should we do dynamic things to this symbol? */ 1242 1243static bool 1244elfNN_ia64_dynamic_symbol_p (struct elf_link_hash_entry *h, 1245 struct bfd_link_info *info, int r_type) 1246{ 1247 bool ignore_protected 1248 = ((r_type & 0xf8) == 0x40 /* FPTR relocs */ 1249 || (r_type & 0xf8) == 0x50); /* LTOFF_FPTR relocs */ 1250 1251 return _bfd_elf_dynamic_symbol_p (h, info, ignore_protected); 1252} 1253 1254static struct bfd_hash_entry* 1255elfNN_ia64_new_elf_hash_entry (struct bfd_hash_entry *entry, 1256 struct bfd_hash_table *table, 1257 const char *string) 1258{ 1259 struct elfNN_ia64_link_hash_entry *ret; 1260 ret = (struct elfNN_ia64_link_hash_entry *) entry; 1261 1262 /* Allocate the structure if it has not already been allocated by a 1263 subclass. */ 1264 if (!ret) 1265 ret = bfd_hash_allocate (table, sizeof (*ret)); 1266 1267 if (!ret) 1268 return 0; 1269 1270 /* Call the allocation method of the superclass. */ 1271 ret = ((struct elfNN_ia64_link_hash_entry *) 1272 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, 1273 table, string)); 1274 1275 ret->info = NULL; 1276 ret->count = 0; 1277 ret->sorted_count = 0; 1278 ret->size = 0; 1279 return (struct bfd_hash_entry *) ret; 1280} 1281 1282static void 1283elfNN_ia64_hash_copy_indirect (struct bfd_link_info *info, 1284 struct elf_link_hash_entry *xdir, 1285 struct elf_link_hash_entry *xind) 1286{ 1287 struct elfNN_ia64_link_hash_entry *dir, *ind; 1288 1289 dir = (struct elfNN_ia64_link_hash_entry *) xdir; 1290 ind = (struct elfNN_ia64_link_hash_entry *) xind; 1291 1292 /* Copy down any references that we may have already seen to the 1293 symbol which just became indirect. */ 1294 1295 if (dir->root.versioned != versioned_hidden) 1296 dir->root.ref_dynamic |= ind->root.ref_dynamic; 1297 dir->root.ref_regular |= ind->root.ref_regular; 1298 dir->root.ref_regular_nonweak |= ind->root.ref_regular_nonweak; 1299 dir->root.needs_plt |= ind->root.needs_plt; 1300 1301 if (ind->root.root.type != bfd_link_hash_indirect) 1302 return; 1303 1304 /* Copy over the got and plt data. This would have been done 1305 by check_relocs. */ 1306 1307 if (ind->info != NULL) 1308 { 1309 struct elfNN_ia64_dyn_sym_info *dyn_i; 1310 unsigned int count; 1311 1312 free (dir->info); 1313 1314 dir->info = ind->info; 1315 dir->count = ind->count; 1316 dir->sorted_count = ind->sorted_count; 1317 dir->size = ind->size; 1318 1319 ind->info = NULL; 1320 ind->count = 0; 1321 ind->sorted_count = 0; 1322 ind->size = 0; 1323 1324 /* Fix up the dyn_sym_info pointers to the global symbol. */ 1325 for (count = dir->count, dyn_i = dir->info; 1326 count != 0; 1327 count--, dyn_i++) 1328 dyn_i->h = &dir->root; 1329 } 1330 1331 /* Copy over the dynindx. */ 1332 1333 if (ind->root.dynindx != -1) 1334 { 1335 if (dir->root.dynindx != -1) 1336 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, 1337 dir->root.dynstr_index); 1338 dir->root.dynindx = ind->root.dynindx; 1339 dir->root.dynstr_index = ind->root.dynstr_index; 1340 ind->root.dynindx = -1; 1341 ind->root.dynstr_index = 0; 1342 } 1343} 1344 1345static void 1346elfNN_ia64_hash_hide_symbol (struct bfd_link_info *info, 1347 struct elf_link_hash_entry *xh, 1348 bool force_local) 1349{ 1350 struct elfNN_ia64_link_hash_entry *h; 1351 struct elfNN_ia64_dyn_sym_info *dyn_i; 1352 unsigned int count; 1353 1354 h = (struct elfNN_ia64_link_hash_entry *)xh; 1355 1356 _bfd_elf_link_hash_hide_symbol (info, &h->root, force_local); 1357 1358 for (count = h->count, dyn_i = h->info; 1359 count != 0; 1360 count--, dyn_i++) 1361 { 1362 dyn_i->want_plt2 = 0; 1363 dyn_i->want_plt = 0; 1364 } 1365} 1366 1367/* Compute a hash of a local hash entry. */ 1368 1369static hashval_t 1370elfNN_ia64_local_htab_hash (const void *ptr) 1371{ 1372 struct elfNN_ia64_local_hash_entry *entry 1373 = (struct elfNN_ia64_local_hash_entry *) ptr; 1374 1375 return ELF_LOCAL_SYMBOL_HASH (entry->id, entry->r_sym); 1376} 1377 1378/* Compare local hash entries. */ 1379 1380static int 1381elfNN_ia64_local_htab_eq (const void *ptr1, const void *ptr2) 1382{ 1383 struct elfNN_ia64_local_hash_entry *entry1 1384 = (struct elfNN_ia64_local_hash_entry *) ptr1; 1385 struct elfNN_ia64_local_hash_entry *entry2 1386 = (struct elfNN_ia64_local_hash_entry *) ptr2; 1387 1388 return entry1->id == entry2->id && entry1->r_sym == entry2->r_sym; 1389} 1390 1391/* Free the global elfNN_ia64_dyn_sym_info array. */ 1392 1393static bool 1394elfNN_ia64_global_dyn_info_free (struct elf_link_hash_entry *xentry, 1395 void *unused ATTRIBUTE_UNUSED) 1396{ 1397 struct elfNN_ia64_link_hash_entry *entry 1398 = (struct elfNN_ia64_link_hash_entry *) xentry; 1399 1400 free (entry->info); 1401 entry->info = NULL; 1402 entry->count = 0; 1403 entry->sorted_count = 0; 1404 entry->size = 0; 1405 1406 return true; 1407} 1408 1409/* Free the local elfNN_ia64_dyn_sym_info array. */ 1410 1411static int 1412elfNN_ia64_local_dyn_info_free (void **slot, 1413 void * unused ATTRIBUTE_UNUSED) 1414{ 1415 struct elfNN_ia64_local_hash_entry *entry 1416 = (struct elfNN_ia64_local_hash_entry *) *slot; 1417 1418 free (entry->info); 1419 entry->info = NULL; 1420 entry->count = 0; 1421 entry->sorted_count = 0; 1422 entry->size = 0; 1423 1424 return true; 1425} 1426 1427/* Destroy IA-64 linker hash table. */ 1428 1429static void 1430elfNN_ia64_link_hash_table_free (bfd *obfd) 1431{ 1432 struct elfNN_ia64_link_hash_table *ia64_info 1433 = (struct elfNN_ia64_link_hash_table *) obfd->link.hash; 1434 if (ia64_info->loc_hash_table) 1435 { 1436 htab_traverse (ia64_info->loc_hash_table, 1437 elfNN_ia64_local_dyn_info_free, NULL); 1438 htab_delete (ia64_info->loc_hash_table); 1439 } 1440 if (ia64_info->loc_hash_memory) 1441 objalloc_free ((struct objalloc *) ia64_info->loc_hash_memory); 1442 elf_link_hash_traverse (&ia64_info->root, 1443 elfNN_ia64_global_dyn_info_free, NULL); 1444 _bfd_elf_link_hash_table_free (obfd); 1445} 1446 1447/* Create the derived linker hash table. The IA-64 ELF port uses this 1448 derived hash table to keep information specific to the IA-64 ElF 1449 linker (without using static variables). */ 1450 1451static struct bfd_link_hash_table * 1452elfNN_ia64_hash_table_create (bfd *abfd) 1453{ 1454 struct elfNN_ia64_link_hash_table *ret; 1455 1456 ret = bfd_zmalloc ((bfd_size_type) sizeof (*ret)); 1457 if (!ret) 1458 return NULL; 1459 1460 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, 1461 elfNN_ia64_new_elf_hash_entry, 1462 sizeof (struct elfNN_ia64_link_hash_entry), 1463 IA64_ELF_DATA)) 1464 { 1465 free (ret); 1466 return NULL; 1467 } 1468 1469 ret->loc_hash_table = htab_try_create (1024, elfNN_ia64_local_htab_hash, 1470 elfNN_ia64_local_htab_eq, NULL); 1471 ret->loc_hash_memory = objalloc_create (); 1472 if (!ret->loc_hash_table || !ret->loc_hash_memory) 1473 { 1474 elfNN_ia64_link_hash_table_free (abfd); 1475 return NULL; 1476 } 1477 ret->root.root.hash_table_free = elfNN_ia64_link_hash_table_free; 1478 ret->root.dt_pltgot_required = true; 1479 1480 return &ret->root.root; 1481} 1482 1483/* Traverse both local and global hash tables. */ 1484 1485struct elfNN_ia64_dyn_sym_traverse_data 1486{ 1487 bool (*func) (struct elfNN_ia64_dyn_sym_info *, void *); 1488 void * data; 1489}; 1490 1491static bool 1492elfNN_ia64_global_dyn_sym_thunk (struct elf_link_hash_entry *xentry, 1493 void * xdata) 1494{ 1495 struct elfNN_ia64_link_hash_entry *entry 1496 = (struct elfNN_ia64_link_hash_entry *) xentry; 1497 struct elfNN_ia64_dyn_sym_traverse_data *data 1498 = (struct elfNN_ia64_dyn_sym_traverse_data *) xdata; 1499 struct elfNN_ia64_dyn_sym_info *dyn_i; 1500 unsigned int count; 1501 1502 for (count = entry->count, dyn_i = entry->info; 1503 count != 0; 1504 count--, dyn_i++) 1505 if (! (*data->func) (dyn_i, data->data)) 1506 return false; 1507 return true; 1508} 1509 1510static int 1511elfNN_ia64_local_dyn_sym_thunk (void **slot, void * xdata) 1512{ 1513 struct elfNN_ia64_local_hash_entry *entry 1514 = (struct elfNN_ia64_local_hash_entry *) *slot; 1515 struct elfNN_ia64_dyn_sym_traverse_data *data 1516 = (struct elfNN_ia64_dyn_sym_traverse_data *) xdata; 1517 struct elfNN_ia64_dyn_sym_info *dyn_i; 1518 unsigned int count; 1519 1520 for (count = entry->count, dyn_i = entry->info; 1521 count != 0; 1522 count--, dyn_i++) 1523 if (! (*data->func) (dyn_i, data->data)) 1524 return false; 1525 return true; 1526} 1527 1528static void 1529elfNN_ia64_dyn_sym_traverse (struct elfNN_ia64_link_hash_table *ia64_info, 1530 bool (*func) (struct elfNN_ia64_dyn_sym_info *, 1531 void *), 1532 void * data) 1533{ 1534 struct elfNN_ia64_dyn_sym_traverse_data xdata; 1535 1536 xdata.func = func; 1537 xdata.data = data; 1538 1539 elf_link_hash_traverse (&ia64_info->root, 1540 elfNN_ia64_global_dyn_sym_thunk, &xdata); 1541 htab_traverse (ia64_info->loc_hash_table, 1542 elfNN_ia64_local_dyn_sym_thunk, &xdata); 1543} 1544 1545static bool 1546elfNN_ia64_create_dynamic_sections (bfd *abfd, 1547 struct bfd_link_info *info) 1548{ 1549 struct elfNN_ia64_link_hash_table *ia64_info; 1550 asection *s; 1551 1552 if (! _bfd_elf_create_dynamic_sections (abfd, info)) 1553 return false; 1554 1555 ia64_info = elfNN_ia64_hash_table (info); 1556 if (ia64_info == NULL) 1557 return false; 1558 1559 { 1560 flagword flags = bfd_section_flags (ia64_info->root.sgot); 1561 bfd_set_section_flags (ia64_info->root.sgot, SEC_SMALL_DATA | flags); 1562 /* The .got section is always aligned at 8 bytes. */ 1563 if (!bfd_set_section_alignment (ia64_info->root.sgot, 3)) 1564 return false; 1565 } 1566 1567 if (!get_pltoff (abfd, info, ia64_info)) 1568 return false; 1569 1570 s = bfd_make_section_anyway_with_flags (abfd, ".rela.IA_64.pltoff", 1571 (SEC_ALLOC | SEC_LOAD 1572 | SEC_HAS_CONTENTS 1573 | SEC_IN_MEMORY 1574 | SEC_LINKER_CREATED 1575 | SEC_READONLY)); 1576 if (s == NULL 1577 || !bfd_set_section_alignment (s, LOG_SECTION_ALIGN)) 1578 return false; 1579 ia64_info->rel_pltoff_sec = s; 1580 1581 return true; 1582} 1583 1584/* Find and/or create a hash entry for local symbol. */ 1585static struct elfNN_ia64_local_hash_entry * 1586get_local_sym_hash (struct elfNN_ia64_link_hash_table *ia64_info, 1587 bfd *abfd, const Elf_Internal_Rela *rel, 1588 bool create) 1589{ 1590 struct elfNN_ia64_local_hash_entry e, *ret; 1591 asection *sec = abfd->sections; 1592 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id, 1593 ELFNN_R_SYM (rel->r_info)); 1594 void **slot; 1595 1596 e.id = sec->id; 1597 e.r_sym = ELFNN_R_SYM (rel->r_info); 1598 slot = htab_find_slot_with_hash (ia64_info->loc_hash_table, &e, h, 1599 create ? INSERT : NO_INSERT); 1600 1601 if (!slot) 1602 return NULL; 1603 1604 if (*slot) 1605 return (struct elfNN_ia64_local_hash_entry *) *slot; 1606 1607 ret = (struct elfNN_ia64_local_hash_entry *) 1608 objalloc_alloc ((struct objalloc *) ia64_info->loc_hash_memory, 1609 sizeof (struct elfNN_ia64_local_hash_entry)); 1610 if (ret) 1611 { 1612 memset (ret, 0, sizeof (*ret)); 1613 ret->id = sec->id; 1614 ret->r_sym = ELFNN_R_SYM (rel->r_info); 1615 *slot = ret; 1616 } 1617 return ret; 1618} 1619 1620/* Used to sort elfNN_ia64_dyn_sym_info array. */ 1621 1622static int 1623addend_compare (const void *xp, const void *yp) 1624{ 1625 const struct elfNN_ia64_dyn_sym_info *x 1626 = (const struct elfNN_ia64_dyn_sym_info *) xp; 1627 const struct elfNN_ia64_dyn_sym_info *y 1628 = (const struct elfNN_ia64_dyn_sym_info *) yp; 1629 1630 return x->addend < y->addend ? -1 : x->addend > y->addend ? 1 : 0; 1631} 1632 1633/* Sort elfNN_ia64_dyn_sym_info array and remove duplicates. */ 1634 1635static unsigned int 1636sort_dyn_sym_info (struct elfNN_ia64_dyn_sym_info *info, 1637 unsigned int count) 1638{ 1639 bfd_vma curr, prev, got_offset; 1640 unsigned int i, kept, dupes, diff, dest, src, len; 1641 1642 qsort (info, count, sizeof (*info), addend_compare); 1643 1644 /* Find the first duplicate. */ 1645 prev = info [0].addend; 1646 got_offset = info [0].got_offset; 1647 for (i = 1; i < count; i++) 1648 { 1649 curr = info [i].addend; 1650 if (curr == prev) 1651 { 1652 /* For duplicates, make sure that GOT_OFFSET is valid. */ 1653 if (got_offset == (bfd_vma) -1) 1654 got_offset = info [i].got_offset; 1655 break; 1656 } 1657 got_offset = info [i].got_offset; 1658 prev = curr; 1659 } 1660 1661 /* We may move a block of elements to here. */ 1662 dest = i++; 1663 1664 /* Remove duplicates. */ 1665 if (i < count) 1666 { 1667 while (i < count) 1668 { 1669 /* For duplicates, make sure that the kept one has a valid 1670 got_offset. */ 1671 kept = dest - 1; 1672 if (got_offset != (bfd_vma) -1) 1673 info [kept].got_offset = got_offset; 1674 1675 curr = info [i].addend; 1676 got_offset = info [i].got_offset; 1677 1678 /* Move a block of elements whose first one is different from 1679 the previous. */ 1680 if (curr == prev) 1681 { 1682 for (src = i + 1; src < count; src++) 1683 { 1684 if (info [src].addend != curr) 1685 break; 1686 /* For duplicates, make sure that GOT_OFFSET is 1687 valid. */ 1688 if (got_offset == (bfd_vma) -1) 1689 got_offset = info [src].got_offset; 1690 } 1691 1692 /* Make sure that the kept one has a valid got_offset. */ 1693 if (got_offset != (bfd_vma) -1) 1694 info [kept].got_offset = got_offset; 1695 } 1696 else 1697 src = i; 1698 1699 if (src >= count) 1700 break; 1701 1702 /* Find the next duplicate. SRC will be kept. */ 1703 prev = info [src].addend; 1704 got_offset = info [src].got_offset; 1705 for (dupes = src + 1; dupes < count; dupes ++) 1706 { 1707 curr = info [dupes].addend; 1708 if (curr == prev) 1709 { 1710 /* Make sure that got_offset is valid. */ 1711 if (got_offset == (bfd_vma) -1) 1712 got_offset = info [dupes].got_offset; 1713 1714 /* For duplicates, make sure that the kept one has 1715 a valid got_offset. */ 1716 if (got_offset != (bfd_vma) -1) 1717 info [dupes - 1].got_offset = got_offset; 1718 break; 1719 } 1720 got_offset = info [dupes].got_offset; 1721 prev = curr; 1722 } 1723 1724 /* How much to move. */ 1725 len = dupes - src; 1726 i = dupes + 1; 1727 1728 if (len == 1 && dupes < count) 1729 { 1730 /* If we only move 1 element, we combine it with the next 1731 one. There must be at least a duplicate. Find the 1732 next different one. */ 1733 for (diff = dupes + 1, src++; diff < count; diff++, src++) 1734 { 1735 if (info [diff].addend != curr) 1736 break; 1737 /* Make sure that got_offset is valid. */ 1738 if (got_offset == (bfd_vma) -1) 1739 got_offset = info [diff].got_offset; 1740 } 1741 1742 /* Makre sure that the last duplicated one has an valid 1743 offset. */ 1744 BFD_ASSERT (curr == prev); 1745 if (got_offset != (bfd_vma) -1) 1746 info [diff - 1].got_offset = got_offset; 1747 1748 if (diff < count) 1749 { 1750 /* Find the next duplicate. Track the current valid 1751 offset. */ 1752 prev = info [diff].addend; 1753 got_offset = info [diff].got_offset; 1754 for (dupes = diff + 1; dupes < count; dupes ++) 1755 { 1756 curr = info [dupes].addend; 1757 if (curr == prev) 1758 { 1759 /* For duplicates, make sure that GOT_OFFSET 1760 is valid. */ 1761 if (got_offset == (bfd_vma) -1) 1762 got_offset = info [dupes].got_offset; 1763 break; 1764 } 1765 got_offset = info [dupes].got_offset; 1766 prev = curr; 1767 diff++; 1768 } 1769 1770 len = diff - src + 1; 1771 i = diff + 1; 1772 } 1773 } 1774 1775 memmove (&info [dest], &info [src], len * sizeof (*info)); 1776 1777 dest += len; 1778 } 1779 1780 count = dest; 1781 } 1782 else 1783 { 1784 /* When we get here, either there is no duplicate at all or 1785 the only duplicate is the last element. */ 1786 if (dest < count) 1787 { 1788 /* If the last element is a duplicate, make sure that the 1789 kept one has a valid got_offset. We also update count. */ 1790 if (got_offset != (bfd_vma) -1) 1791 info [dest - 1].got_offset = got_offset; 1792 count = dest; 1793 } 1794 } 1795 1796 return count; 1797} 1798 1799/* Find and/or create a descriptor for dynamic symbol info. This will 1800 vary based on global or local symbol, and the addend to the reloc. 1801 1802 We don't sort when inserting. Also, we sort and eliminate 1803 duplicates if there is an unsorted section. Typically, this will 1804 only happen once, because we do all insertions before lookups. We 1805 then use bsearch to do a lookup. This also allows lookups to be 1806 fast. So we have fast insertion (O(log N) due to duplicate check), 1807 fast lookup (O(log N)) and one sort (O(N log N) expected time). 1808 Previously, all lookups were O(N) because of the use of the linked 1809 list and also all insertions were O(N) because of the check for 1810 duplicates. There are some complications here because the array 1811 size grows occasionally, which may add an O(N) factor, but this 1812 should be rare. Also, we free the excess array allocation, which 1813 requires a copy which is O(N), but this only happens once. */ 1814 1815static struct elfNN_ia64_dyn_sym_info * 1816get_dyn_sym_info (struct elfNN_ia64_link_hash_table *ia64_info, 1817 struct elf_link_hash_entry *h, bfd *abfd, 1818 const Elf_Internal_Rela *rel, bool create) 1819{ 1820 struct elfNN_ia64_dyn_sym_info **info_p, *info, *dyn_i, key; 1821 unsigned int *count_p, *sorted_count_p, *size_p; 1822 unsigned int count, sorted_count, size; 1823 bfd_vma addend = rel ? rel->r_addend : 0; 1824 bfd_size_type amt; 1825 1826 if (h) 1827 { 1828 struct elfNN_ia64_link_hash_entry *global_h; 1829 1830 global_h = (struct elfNN_ia64_link_hash_entry *) h; 1831 info_p = &global_h->info; 1832 count_p = &global_h->count; 1833 sorted_count_p = &global_h->sorted_count; 1834 size_p = &global_h->size; 1835 } 1836 else 1837 { 1838 struct elfNN_ia64_local_hash_entry *loc_h; 1839 1840 loc_h = get_local_sym_hash (ia64_info, abfd, rel, create); 1841 if (!loc_h) 1842 { 1843 BFD_ASSERT (!create); 1844 return NULL; 1845 } 1846 1847 info_p = &loc_h->info; 1848 count_p = &loc_h->count; 1849 sorted_count_p = &loc_h->sorted_count; 1850 size_p = &loc_h->size; 1851 } 1852 1853 count = *count_p; 1854 sorted_count = *sorted_count_p; 1855 size = *size_p; 1856 info = *info_p; 1857 if (create) 1858 { 1859 /* When we create the array, we don't check for duplicates, 1860 except in the previously sorted section if one exists, and 1861 against the last inserted entry. This allows insertions to 1862 be fast. */ 1863 if (info) 1864 { 1865 if (sorted_count) 1866 { 1867 /* Try bsearch first on the sorted section. */ 1868 key.addend = addend; 1869 dyn_i = bsearch (&key, info, sorted_count, 1870 sizeof (*info), addend_compare); 1871 if (dyn_i) 1872 return dyn_i; 1873 } 1874 1875 if (count != 0) 1876 { 1877 /* Do a quick check for the last inserted entry. */ 1878 dyn_i = info + count - 1; 1879 if (dyn_i->addend == addend) 1880 return dyn_i; 1881 } 1882 } 1883 1884 if (size == 0) 1885 { 1886 /* It is the very first element. We create the array of size 1887 1. */ 1888 size = 1; 1889 amt = size * sizeof (*info); 1890 info = bfd_malloc (amt); 1891 } 1892 else if (size <= count) 1893 { 1894 /* We double the array size every time when we reach the 1895 size limit. */ 1896 size += size; 1897 amt = size * sizeof (*info); 1898 info = bfd_realloc (info, amt); 1899 } 1900 else 1901 goto has_space; 1902 1903 if (info == NULL) 1904 return NULL; 1905 *size_p = size; 1906 *info_p = info; 1907 1908 has_space: 1909 /* Append the new one to the array. */ 1910 dyn_i = info + count; 1911 memset (dyn_i, 0, sizeof (*dyn_i)); 1912 dyn_i->got_offset = (bfd_vma) -1; 1913 dyn_i->addend = addend; 1914 1915 /* We increment count only since the new ones are unsorted and 1916 may have duplicate. */ 1917 (*count_p)++; 1918 } 1919 else 1920 { 1921 /* It is a lookup without insertion. Sort array if part of the 1922 array isn't sorted. */ 1923 if (count != sorted_count) 1924 { 1925 count = sort_dyn_sym_info (info, count); 1926 *count_p = count; 1927 *sorted_count_p = count; 1928 } 1929 1930 /* Free unused memory. */ 1931 if (size != count) 1932 { 1933 amt = count * sizeof (*info); 1934 info = bfd_realloc (info, amt); 1935 *size_p = count; 1936 if (info == NULL && count != 0) 1937 /* realloc should never fail since we are reducing size here, 1938 but if it does use the old array. */ 1939 info = *info_p; 1940 else 1941 *info_p = info; 1942 } 1943 1944 if (count == 0) 1945 dyn_i = NULL; 1946 else 1947 { 1948 key.addend = addend; 1949 dyn_i = bsearch (&key, info, count, sizeof (*info), addend_compare); 1950 } 1951 } 1952 1953 return dyn_i; 1954} 1955 1956static asection * 1957get_got (bfd *abfd, struct bfd_link_info *info, 1958 struct elfNN_ia64_link_hash_table *ia64_info) 1959{ 1960 asection *got; 1961 bfd *dynobj; 1962 1963 got = ia64_info->root.sgot; 1964 if (!got) 1965 { 1966 flagword flags; 1967 1968 dynobj = ia64_info->root.dynobj; 1969 if (!dynobj) 1970 ia64_info->root.dynobj = dynobj = abfd; 1971 if (!_bfd_elf_create_got_section (dynobj, info)) 1972 return NULL; 1973 1974 got = ia64_info->root.sgot; 1975 1976 /* The .got section is always aligned at 8 bytes. */ 1977 if (!bfd_set_section_alignment (got, 3)) 1978 return NULL; 1979 1980 flags = bfd_section_flags (got); 1981 if (!bfd_set_section_flags (got, SEC_SMALL_DATA | flags)) 1982 return NULL; 1983 } 1984 1985 return got; 1986} 1987 1988/* Create function descriptor section (.opd). This section is called .opd 1989 because it contains "official procedure descriptors". The "official" 1990 refers to the fact that these descriptors are used when taking the address 1991 of a procedure, thus ensuring a unique address for each procedure. */ 1992 1993static asection * 1994get_fptr (bfd *abfd, struct bfd_link_info *info, 1995 struct elfNN_ia64_link_hash_table *ia64_info) 1996{ 1997 asection *fptr; 1998 bfd *dynobj; 1999 2000 fptr = ia64_info->fptr_sec; 2001 if (!fptr) 2002 { 2003 dynobj = ia64_info->root.dynobj; 2004 if (!dynobj) 2005 ia64_info->root.dynobj = dynobj = abfd; 2006 2007 fptr = bfd_make_section_anyway_with_flags (dynobj, ".opd", 2008 (SEC_ALLOC 2009 | SEC_LOAD 2010 | SEC_HAS_CONTENTS 2011 | SEC_IN_MEMORY 2012 | (bfd_link_pie (info) 2013 ? 0 : SEC_READONLY) 2014 | SEC_LINKER_CREATED)); 2015 if (!fptr 2016 || !bfd_set_section_alignment (fptr, 4)) 2017 { 2018 BFD_ASSERT (0); 2019 return NULL; 2020 } 2021 2022 ia64_info->fptr_sec = fptr; 2023 2024 if (bfd_link_pie (info)) 2025 { 2026 asection *fptr_rel; 2027 fptr_rel = bfd_make_section_anyway_with_flags (dynobj, ".rela.opd", 2028 (SEC_ALLOC | SEC_LOAD 2029 | SEC_HAS_CONTENTS 2030 | SEC_IN_MEMORY 2031 | SEC_LINKER_CREATED 2032 | SEC_READONLY)); 2033 if (fptr_rel == NULL 2034 || !bfd_set_section_alignment (fptr_rel, LOG_SECTION_ALIGN)) 2035 { 2036 BFD_ASSERT (0); 2037 return NULL; 2038 } 2039 2040 ia64_info->rel_fptr_sec = fptr_rel; 2041 } 2042 } 2043 2044 return fptr; 2045} 2046 2047static asection * 2048get_pltoff (bfd *abfd, struct bfd_link_info *info ATTRIBUTE_UNUSED, 2049 struct elfNN_ia64_link_hash_table *ia64_info) 2050{ 2051 asection *pltoff; 2052 bfd *dynobj; 2053 2054 pltoff = ia64_info->pltoff_sec; 2055 if (!pltoff) 2056 { 2057 dynobj = ia64_info->root.dynobj; 2058 if (!dynobj) 2059 ia64_info->root.dynobj = dynobj = abfd; 2060 2061 pltoff = bfd_make_section_anyway_with_flags (dynobj, 2062 ELF_STRING_ia64_pltoff, 2063 (SEC_ALLOC 2064 | SEC_LOAD 2065 | SEC_HAS_CONTENTS 2066 | SEC_IN_MEMORY 2067 | SEC_SMALL_DATA 2068 | SEC_LINKER_CREATED)); 2069 if (!pltoff 2070 || !bfd_set_section_alignment (pltoff, 4)) 2071 { 2072 BFD_ASSERT (0); 2073 return NULL; 2074 } 2075 2076 ia64_info->pltoff_sec = pltoff; 2077 } 2078 2079 return pltoff; 2080} 2081 2082static asection * 2083get_reloc_section (bfd *abfd, 2084 struct elfNN_ia64_link_hash_table *ia64_info, 2085 asection *sec, bool create) 2086{ 2087 const char *srel_name; 2088 asection *srel; 2089 bfd *dynobj; 2090 2091 srel_name = (bfd_elf_string_from_elf_section 2092 (abfd, elf_elfheader(abfd)->e_shstrndx, 2093 _bfd_elf_single_rel_hdr (sec)->sh_name)); 2094 if (srel_name == NULL) 2095 return NULL; 2096 2097 dynobj = ia64_info->root.dynobj; 2098 if (!dynobj) 2099 ia64_info->root.dynobj = dynobj = abfd; 2100 2101 srel = bfd_get_linker_section (dynobj, srel_name); 2102 if (srel == NULL && create) 2103 { 2104 srel = bfd_make_section_anyway_with_flags (dynobj, srel_name, 2105 (SEC_ALLOC | SEC_LOAD 2106 | SEC_HAS_CONTENTS 2107 | SEC_IN_MEMORY 2108 | SEC_LINKER_CREATED 2109 | SEC_READONLY)); 2110 if (srel == NULL 2111 || !bfd_set_section_alignment (srel, LOG_SECTION_ALIGN)) 2112 return NULL; 2113 } 2114 2115 return srel; 2116} 2117 2118static bool 2119count_dyn_reloc (bfd *abfd, struct elfNN_ia64_dyn_sym_info *dyn_i, 2120 asection *srel, int type, bool reltext) 2121{ 2122 struct elfNN_ia64_dyn_reloc_entry *rent; 2123 2124 for (rent = dyn_i->reloc_entries; rent; rent = rent->next) 2125 if (rent->srel == srel && rent->type == type) 2126 break; 2127 2128 if (!rent) 2129 { 2130 rent = ((struct elfNN_ia64_dyn_reloc_entry *) 2131 bfd_alloc (abfd, (bfd_size_type) sizeof (*rent))); 2132 if (!rent) 2133 return false; 2134 2135 rent->next = dyn_i->reloc_entries; 2136 rent->srel = srel; 2137 rent->type = type; 2138 rent->count = 0; 2139 dyn_i->reloc_entries = rent; 2140 } 2141 rent->reltext = reltext; 2142 rent->count++; 2143 2144 return true; 2145} 2146 2147static bool 2148elfNN_ia64_check_relocs (bfd *abfd, struct bfd_link_info *info, 2149 asection *sec, 2150 const Elf_Internal_Rela *relocs) 2151{ 2152 struct elfNN_ia64_link_hash_table *ia64_info; 2153 const Elf_Internal_Rela *relend; 2154 Elf_Internal_Shdr *symtab_hdr; 2155 const Elf_Internal_Rela *rel; 2156 asection *got, *fptr, *srel, *pltoff; 2157 enum { 2158 NEED_GOT = 1, 2159 NEED_GOTX = 2, 2160 NEED_FPTR = 4, 2161 NEED_PLTOFF = 8, 2162 NEED_MIN_PLT = 16, 2163 NEED_FULL_PLT = 32, 2164 NEED_DYNREL = 64, 2165 NEED_LTOFF_FPTR = 128, 2166 NEED_TPREL = 256, 2167 NEED_DTPMOD = 512, 2168 NEED_DTPREL = 1024 2169 }; 2170 int need_entry; 2171 struct elf_link_hash_entry *h; 2172 unsigned long r_symndx; 2173 bool maybe_dynamic; 2174 2175 if (bfd_link_relocatable (info)) 2176 return true; 2177 2178 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 2179 ia64_info = elfNN_ia64_hash_table (info); 2180 if (ia64_info == NULL) 2181 return false; 2182 2183 got = fptr = srel = pltoff = NULL; 2184 2185 relend = relocs + sec->reloc_count; 2186 2187 /* We scan relocations first to create dynamic relocation arrays. We 2188 modified get_dyn_sym_info to allow fast insertion and support fast 2189 lookup in the next loop. */ 2190 for (rel = relocs; rel < relend; ++rel) 2191 { 2192 r_symndx = ELFNN_R_SYM (rel->r_info); 2193 if (r_symndx >= symtab_hdr->sh_info) 2194 { 2195 long indx = r_symndx - symtab_hdr->sh_info; 2196 h = elf_sym_hashes (abfd)[indx]; 2197 while (h->root.type == bfd_link_hash_indirect 2198 || h->root.type == bfd_link_hash_warning) 2199 h = (struct elf_link_hash_entry *) h->root.u.i.link; 2200 } 2201 else 2202 h = NULL; 2203 2204 /* We can only get preliminary data on whether a symbol is 2205 locally or externally defined, as not all of the input files 2206 have yet been processed. Do something with what we know, as 2207 this may help reduce memory usage and processing time later. */ 2208 maybe_dynamic = (h && ((!bfd_link_executable (info) 2209 && (!SYMBOLIC_BIND (info, h) 2210 || info->unresolved_syms_in_shared_libs == RM_IGNORE)) 2211 || !h->def_regular 2212 || h->root.type == bfd_link_hash_defweak)); 2213 2214 need_entry = 0; 2215 switch (ELFNN_R_TYPE (rel->r_info)) 2216 { 2217 case R_IA64_TPREL64MSB: 2218 case R_IA64_TPREL64LSB: 2219 if (bfd_link_pic (info) || maybe_dynamic) 2220 need_entry = NEED_DYNREL; 2221 break; 2222 2223 case R_IA64_LTOFF_TPREL22: 2224 need_entry = NEED_TPREL; 2225 if (bfd_link_pic (info)) 2226 info->flags |= DF_STATIC_TLS; 2227 break; 2228 2229 case R_IA64_DTPREL32MSB: 2230 case R_IA64_DTPREL32LSB: 2231 case R_IA64_DTPREL64MSB: 2232 case R_IA64_DTPREL64LSB: 2233 if (bfd_link_pic (info) || maybe_dynamic) 2234 need_entry = NEED_DYNREL; 2235 break; 2236 2237 case R_IA64_LTOFF_DTPREL22: 2238 need_entry = NEED_DTPREL; 2239 break; 2240 2241 case R_IA64_DTPMOD64MSB: 2242 case R_IA64_DTPMOD64LSB: 2243 if (bfd_link_pic (info) || maybe_dynamic) 2244 need_entry = NEED_DYNREL; 2245 break; 2246 2247 case R_IA64_LTOFF_DTPMOD22: 2248 need_entry = NEED_DTPMOD; 2249 break; 2250 2251 case R_IA64_LTOFF_FPTR22: 2252 case R_IA64_LTOFF_FPTR64I: 2253 case R_IA64_LTOFF_FPTR32MSB: 2254 case R_IA64_LTOFF_FPTR32LSB: 2255 case R_IA64_LTOFF_FPTR64MSB: 2256 case R_IA64_LTOFF_FPTR64LSB: 2257 need_entry = NEED_FPTR | NEED_GOT | NEED_LTOFF_FPTR; 2258 break; 2259 2260 case R_IA64_FPTR64I: 2261 case R_IA64_FPTR32MSB: 2262 case R_IA64_FPTR32LSB: 2263 case R_IA64_FPTR64MSB: 2264 case R_IA64_FPTR64LSB: 2265 if (bfd_link_pic (info) || h) 2266 need_entry = NEED_FPTR | NEED_DYNREL; 2267 else 2268 need_entry = NEED_FPTR; 2269 break; 2270 2271 case R_IA64_LTOFF22: 2272 case R_IA64_LTOFF64I: 2273 need_entry = NEED_GOT; 2274 break; 2275 2276 case R_IA64_LTOFF22X: 2277 need_entry = NEED_GOTX; 2278 break; 2279 2280 case R_IA64_PLTOFF22: 2281 case R_IA64_PLTOFF64I: 2282 case R_IA64_PLTOFF64MSB: 2283 case R_IA64_PLTOFF64LSB: 2284 need_entry = NEED_PLTOFF; 2285 if (h) 2286 { 2287 if (maybe_dynamic) 2288 need_entry |= NEED_MIN_PLT; 2289 } 2290 else 2291 { 2292 (*info->callbacks->warning) 2293 (info, _("@pltoff reloc against local symbol"), 0, 2294 abfd, 0, (bfd_vma) 0); 2295 } 2296 break; 2297 2298 case R_IA64_PCREL21B: 2299 case R_IA64_PCREL60B: 2300 /* Depending on where this symbol is defined, we may or may not 2301 need a full plt entry. Only skip if we know we'll not need 2302 the entry -- static or symbolic, and the symbol definition 2303 has already been seen. */ 2304 if (maybe_dynamic && rel->r_addend == 0) 2305 need_entry = NEED_FULL_PLT; 2306 break; 2307 2308 case R_IA64_IMM14: 2309 case R_IA64_IMM22: 2310 case R_IA64_IMM64: 2311 case R_IA64_DIR32MSB: 2312 case R_IA64_DIR32LSB: 2313 case R_IA64_DIR64MSB: 2314 case R_IA64_DIR64LSB: 2315 /* Shared objects will always need at least a REL relocation. */ 2316 if (bfd_link_pic (info) || maybe_dynamic) 2317 need_entry = NEED_DYNREL; 2318 break; 2319 2320 case R_IA64_IPLTMSB: 2321 case R_IA64_IPLTLSB: 2322 /* Shared objects will always need at least a REL relocation. */ 2323 if (bfd_link_pic (info) || maybe_dynamic) 2324 need_entry = NEED_DYNREL; 2325 break; 2326 2327 case R_IA64_PCREL22: 2328 case R_IA64_PCREL64I: 2329 case R_IA64_PCREL32MSB: 2330 case R_IA64_PCREL32LSB: 2331 case R_IA64_PCREL64MSB: 2332 case R_IA64_PCREL64LSB: 2333 if (maybe_dynamic) 2334 need_entry = NEED_DYNREL; 2335 break; 2336 } 2337 2338 if (!need_entry) 2339 continue; 2340 2341 if ((need_entry & NEED_FPTR) != 0 2342 && rel->r_addend) 2343 { 2344 (*info->callbacks->warning) 2345 (info, _("non-zero addend in @fptr reloc"), 0, 2346 abfd, 0, (bfd_vma) 0); 2347 } 2348 2349 if (get_dyn_sym_info (ia64_info, h, abfd, rel, true) == NULL) 2350 return false; 2351 } 2352 2353 /* Now, we only do lookup without insertion, which is very fast 2354 with the modified get_dyn_sym_info. */ 2355 for (rel = relocs; rel < relend; ++rel) 2356 { 2357 struct elfNN_ia64_dyn_sym_info *dyn_i; 2358 int dynrel_type = R_IA64_NONE; 2359 2360 r_symndx = ELFNN_R_SYM (rel->r_info); 2361 if (r_symndx >= symtab_hdr->sh_info) 2362 { 2363 /* We're dealing with a global symbol -- find its hash entry 2364 and mark it as being referenced. */ 2365 long indx = r_symndx - symtab_hdr->sh_info; 2366 h = elf_sym_hashes (abfd)[indx]; 2367 while (h->root.type == bfd_link_hash_indirect 2368 || h->root.type == bfd_link_hash_warning) 2369 h = (struct elf_link_hash_entry *) h->root.u.i.link; 2370 2371 /* PR15323, ref flags aren't set for references in the same 2372 object. */ 2373 h->ref_regular = 1; 2374 } 2375 else 2376 h = NULL; 2377 2378 /* We can only get preliminary data on whether a symbol is 2379 locally or externally defined, as not all of the input files 2380 have yet been processed. Do something with what we know, as 2381 this may help reduce memory usage and processing time later. */ 2382 maybe_dynamic = (h && ((!bfd_link_executable (info) 2383 && (!SYMBOLIC_BIND (info, h) 2384 || info->unresolved_syms_in_shared_libs == RM_IGNORE)) 2385 || !h->def_regular 2386 || h->root.type == bfd_link_hash_defweak)); 2387 2388 need_entry = 0; 2389 switch (ELFNN_R_TYPE (rel->r_info)) 2390 { 2391 case R_IA64_TPREL64MSB: 2392 case R_IA64_TPREL64LSB: 2393 if (bfd_link_pic (info) || maybe_dynamic) 2394 need_entry = NEED_DYNREL; 2395 dynrel_type = R_IA64_TPREL64LSB; 2396 if (bfd_link_pic (info)) 2397 info->flags |= DF_STATIC_TLS; 2398 break; 2399 2400 case R_IA64_LTOFF_TPREL22: 2401 need_entry = NEED_TPREL; 2402 if (bfd_link_pic (info)) 2403 info->flags |= DF_STATIC_TLS; 2404 break; 2405 2406 case R_IA64_DTPREL32MSB: 2407 case R_IA64_DTPREL32LSB: 2408 case R_IA64_DTPREL64MSB: 2409 case R_IA64_DTPREL64LSB: 2410 if (bfd_link_pic (info) || maybe_dynamic) 2411 need_entry = NEED_DYNREL; 2412 dynrel_type = R_IA64_DTPRELNNLSB; 2413 break; 2414 2415 case R_IA64_LTOFF_DTPREL22: 2416 need_entry = NEED_DTPREL; 2417 break; 2418 2419 case R_IA64_DTPMOD64MSB: 2420 case R_IA64_DTPMOD64LSB: 2421 if (bfd_link_pic (info) || maybe_dynamic) 2422 need_entry = NEED_DYNREL; 2423 dynrel_type = R_IA64_DTPMOD64LSB; 2424 break; 2425 2426 case R_IA64_LTOFF_DTPMOD22: 2427 need_entry = NEED_DTPMOD; 2428 break; 2429 2430 case R_IA64_LTOFF_FPTR22: 2431 case R_IA64_LTOFF_FPTR64I: 2432 case R_IA64_LTOFF_FPTR32MSB: 2433 case R_IA64_LTOFF_FPTR32LSB: 2434 case R_IA64_LTOFF_FPTR64MSB: 2435 case R_IA64_LTOFF_FPTR64LSB: 2436 need_entry = NEED_FPTR | NEED_GOT | NEED_LTOFF_FPTR; 2437 break; 2438 2439 case R_IA64_FPTR64I: 2440 case R_IA64_FPTR32MSB: 2441 case R_IA64_FPTR32LSB: 2442 case R_IA64_FPTR64MSB: 2443 case R_IA64_FPTR64LSB: 2444 if (bfd_link_pic (info) || h) 2445 need_entry = NEED_FPTR | NEED_DYNREL; 2446 else 2447 need_entry = NEED_FPTR; 2448 dynrel_type = R_IA64_FPTRNNLSB; 2449 break; 2450 2451 case R_IA64_LTOFF22: 2452 case R_IA64_LTOFF64I: 2453 need_entry = NEED_GOT; 2454 break; 2455 2456 case R_IA64_LTOFF22X: 2457 need_entry = NEED_GOTX; 2458 break; 2459 2460 case R_IA64_PLTOFF22: 2461 case R_IA64_PLTOFF64I: 2462 case R_IA64_PLTOFF64MSB: 2463 case R_IA64_PLTOFF64LSB: 2464 need_entry = NEED_PLTOFF; 2465 if (h) 2466 { 2467 if (maybe_dynamic) 2468 need_entry |= NEED_MIN_PLT; 2469 } 2470 break; 2471 2472 case R_IA64_PCREL21B: 2473 case R_IA64_PCREL60B: 2474 /* Depending on where this symbol is defined, we may or may not 2475 need a full plt entry. Only skip if we know we'll not need 2476 the entry -- static or symbolic, and the symbol definition 2477 has already been seen. */ 2478 if (maybe_dynamic && rel->r_addend == 0) 2479 need_entry = NEED_FULL_PLT; 2480 break; 2481 2482 case R_IA64_IMM14: 2483 case R_IA64_IMM22: 2484 case R_IA64_IMM64: 2485 case R_IA64_DIR32MSB: 2486 case R_IA64_DIR32LSB: 2487 case R_IA64_DIR64MSB: 2488 case R_IA64_DIR64LSB: 2489 /* Shared objects will always need at least a REL relocation. */ 2490 if (bfd_link_pic (info) || maybe_dynamic) 2491 need_entry = NEED_DYNREL; 2492 dynrel_type = R_IA64_DIRNNLSB; 2493 break; 2494 2495 case R_IA64_IPLTMSB: 2496 case R_IA64_IPLTLSB: 2497 /* Shared objects will always need at least a REL relocation. */ 2498 if (bfd_link_pic (info) || maybe_dynamic) 2499 need_entry = NEED_DYNREL; 2500 dynrel_type = R_IA64_IPLTLSB; 2501 break; 2502 2503 case R_IA64_PCREL22: 2504 case R_IA64_PCREL64I: 2505 case R_IA64_PCREL32MSB: 2506 case R_IA64_PCREL32LSB: 2507 case R_IA64_PCREL64MSB: 2508 case R_IA64_PCREL64LSB: 2509 if (maybe_dynamic) 2510 need_entry = NEED_DYNREL; 2511 dynrel_type = R_IA64_PCRELNNLSB; 2512 break; 2513 } 2514 2515 if (!need_entry) 2516 continue; 2517 2518 dyn_i = get_dyn_sym_info (ia64_info, h, abfd, rel, false); 2519 2520 /* Record whether or not this is a local symbol. */ 2521 dyn_i->h = h; 2522 2523 /* Create what's needed. */ 2524 if (need_entry & (NEED_GOT | NEED_GOTX | NEED_TPREL 2525 | NEED_DTPMOD | NEED_DTPREL)) 2526 { 2527 if (!got) 2528 { 2529 got = get_got (abfd, info, ia64_info); 2530 if (!got) 2531 return false; 2532 } 2533 if (need_entry & NEED_GOT) 2534 dyn_i->want_got = 1; 2535 if (need_entry & NEED_GOTX) 2536 dyn_i->want_gotx = 1; 2537 if (need_entry & NEED_TPREL) 2538 dyn_i->want_tprel = 1; 2539 if (need_entry & NEED_DTPMOD) 2540 dyn_i->want_dtpmod = 1; 2541 if (need_entry & NEED_DTPREL) 2542 dyn_i->want_dtprel = 1; 2543 } 2544 if (need_entry & NEED_FPTR) 2545 { 2546 if (!fptr) 2547 { 2548 fptr = get_fptr (abfd, info, ia64_info); 2549 if (!fptr) 2550 return false; 2551 } 2552 2553 /* FPTRs for shared libraries are allocated by the dynamic 2554 linker. Make sure this local symbol will appear in the 2555 dynamic symbol table. */ 2556 if (!h && bfd_link_pic (info)) 2557 { 2558 if (! (bfd_elf_link_record_local_dynamic_symbol 2559 (info, abfd, (long) r_symndx))) 2560 return false; 2561 } 2562 2563 dyn_i->want_fptr = 1; 2564 } 2565 if (need_entry & NEED_LTOFF_FPTR) 2566 dyn_i->want_ltoff_fptr = 1; 2567 if (need_entry & (NEED_MIN_PLT | NEED_FULL_PLT)) 2568 { 2569 if (!ia64_info->root.dynobj) 2570 ia64_info->root.dynobj = abfd; 2571 h->needs_plt = 1; 2572 dyn_i->want_plt = 1; 2573 } 2574 if (need_entry & NEED_FULL_PLT) 2575 dyn_i->want_plt2 = 1; 2576 if (need_entry & NEED_PLTOFF) 2577 { 2578 /* This is needed here, in case @pltoff is used in a non-shared 2579 link. */ 2580 if (!pltoff) 2581 { 2582 pltoff = get_pltoff (abfd, info, ia64_info); 2583 if (!pltoff) 2584 return false; 2585 } 2586 2587 dyn_i->want_pltoff = 1; 2588 } 2589 if ((need_entry & NEED_DYNREL) && (sec->flags & SEC_ALLOC)) 2590 { 2591 if (!srel) 2592 { 2593 srel = get_reloc_section (abfd, ia64_info, sec, true); 2594 if (!srel) 2595 return false; 2596 } 2597 if (!count_dyn_reloc (abfd, dyn_i, srel, dynrel_type, 2598 (sec->flags & SEC_READONLY) != 0)) 2599 return false; 2600 } 2601 } 2602 2603 return true; 2604} 2605 2606/* For cleanliness, and potentially faster dynamic loading, allocate 2607 external GOT entries first. */ 2608 2609static bool 2610allocate_global_data_got (struct elfNN_ia64_dyn_sym_info *dyn_i, 2611 void * data) 2612{ 2613 struct elfNN_ia64_allocate_data *x = (struct elfNN_ia64_allocate_data *)data; 2614 2615 if ((dyn_i->want_got || dyn_i->want_gotx) 2616 && ! dyn_i->want_fptr 2617 && elfNN_ia64_dynamic_symbol_p (dyn_i->h, x->info, 0)) 2618 { 2619 dyn_i->got_offset = x->ofs; 2620 x->ofs += 8; 2621 } 2622 if (dyn_i->want_tprel) 2623 { 2624 dyn_i->tprel_offset = x->ofs; 2625 x->ofs += 8; 2626 } 2627 if (dyn_i->want_dtpmod) 2628 { 2629 if (elfNN_ia64_dynamic_symbol_p (dyn_i->h, x->info, 0)) 2630 { 2631 dyn_i->dtpmod_offset = x->ofs; 2632 x->ofs += 8; 2633 } 2634 else 2635 { 2636 struct elfNN_ia64_link_hash_table *ia64_info; 2637 2638 ia64_info = elfNN_ia64_hash_table (x->info); 2639 if (ia64_info == NULL) 2640 return false; 2641 2642 if (ia64_info->self_dtpmod_offset == (bfd_vma) -1) 2643 { 2644 ia64_info->self_dtpmod_offset = x->ofs; 2645 x->ofs += 8; 2646 } 2647 dyn_i->dtpmod_offset = ia64_info->self_dtpmod_offset; 2648 } 2649 } 2650 if (dyn_i->want_dtprel) 2651 { 2652 dyn_i->dtprel_offset = x->ofs; 2653 x->ofs += 8; 2654 } 2655 return true; 2656} 2657 2658/* Next, allocate all the GOT entries used by LTOFF_FPTR relocs. */ 2659 2660static bool 2661allocate_global_fptr_got (struct elfNN_ia64_dyn_sym_info *dyn_i, 2662 void * data) 2663{ 2664 struct elfNN_ia64_allocate_data *x = (struct elfNN_ia64_allocate_data *)data; 2665 2666 if (dyn_i->want_got 2667 && dyn_i->want_fptr 2668 && elfNN_ia64_dynamic_symbol_p (dyn_i->h, x->info, R_IA64_FPTRNNLSB)) 2669 { 2670 dyn_i->got_offset = x->ofs; 2671 x->ofs += 8; 2672 } 2673 return true; 2674} 2675 2676/* Lastly, allocate all the GOT entries for local data. */ 2677 2678static bool 2679allocate_local_got (struct elfNN_ia64_dyn_sym_info *dyn_i, 2680 void * data) 2681{ 2682 struct elfNN_ia64_allocate_data *x = (struct elfNN_ia64_allocate_data *)data; 2683 2684 if ((dyn_i->want_got || dyn_i->want_gotx) 2685 && !elfNN_ia64_dynamic_symbol_p (dyn_i->h, x->info, 0)) 2686 { 2687 dyn_i->got_offset = x->ofs; 2688 x->ofs += 8; 2689 } 2690 return true; 2691} 2692 2693/* Search for the index of a global symbol in it's defining object file. */ 2694 2695static long 2696global_sym_index (struct elf_link_hash_entry *h) 2697{ 2698 struct elf_link_hash_entry **p; 2699 bfd *obj; 2700 2701 BFD_ASSERT (h->root.type == bfd_link_hash_defined 2702 || h->root.type == bfd_link_hash_defweak); 2703 2704 obj = h->root.u.def.section->owner; 2705 for (p = elf_sym_hashes (obj); *p != h; ++p) 2706 continue; 2707 2708 return p - elf_sym_hashes (obj) + elf_tdata (obj)->symtab_hdr.sh_info; 2709} 2710 2711/* Allocate function descriptors. We can do these for every function 2712 in a main executable that is not exported. */ 2713 2714static bool 2715allocate_fptr (struct elfNN_ia64_dyn_sym_info *dyn_i, void * data) 2716{ 2717 struct elfNN_ia64_allocate_data *x = (struct elfNN_ia64_allocate_data *)data; 2718 2719 if (dyn_i->want_fptr) 2720 { 2721 struct elf_link_hash_entry *h = dyn_i->h; 2722 2723 if (h) 2724 while (h->root.type == bfd_link_hash_indirect 2725 || h->root.type == bfd_link_hash_warning) 2726 h = (struct elf_link_hash_entry *) h->root.u.i.link; 2727 2728 if (!bfd_link_executable (x->info) 2729 && (!h 2730 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 2731 || (h->root.type != bfd_link_hash_undefweak 2732 && h->root.type != bfd_link_hash_undefined))) 2733 { 2734 if (h && h->dynindx == -1) 2735 { 2736 BFD_ASSERT ((h->root.type == bfd_link_hash_defined) 2737 || (h->root.type == bfd_link_hash_defweak)); 2738 2739 if (!bfd_elf_link_record_local_dynamic_symbol 2740 (x->info, h->root.u.def.section->owner, 2741 global_sym_index (h))) 2742 return false; 2743 } 2744 2745 dyn_i->want_fptr = 0; 2746 } 2747 else if (h == NULL || h->dynindx == -1) 2748 { 2749 dyn_i->fptr_offset = x->ofs; 2750 x->ofs += 16; 2751 } 2752 else 2753 dyn_i->want_fptr = 0; 2754 } 2755 return true; 2756} 2757 2758/* Allocate all the minimal PLT entries. */ 2759 2760static bool 2761allocate_plt_entries (struct elfNN_ia64_dyn_sym_info *dyn_i, 2762 void * data) 2763{ 2764 struct elfNN_ia64_allocate_data *x = (struct elfNN_ia64_allocate_data *)data; 2765 2766 if (dyn_i->want_plt) 2767 { 2768 struct elf_link_hash_entry *h = dyn_i->h; 2769 2770 if (h) 2771 while (h->root.type == bfd_link_hash_indirect 2772 || h->root.type == bfd_link_hash_warning) 2773 h = (struct elf_link_hash_entry *) h->root.u.i.link; 2774 2775 /* ??? Versioned symbols seem to lose NEEDS_PLT. */ 2776 if (elfNN_ia64_dynamic_symbol_p (h, x->info, 0)) 2777 { 2778 bfd_size_type offset = x->ofs; 2779 if (offset == 0) 2780 offset = PLT_HEADER_SIZE; 2781 dyn_i->plt_offset = offset; 2782 x->ofs = offset + PLT_MIN_ENTRY_SIZE; 2783 2784 dyn_i->want_pltoff = 1; 2785 } 2786 else 2787 { 2788 dyn_i->want_plt = 0; 2789 dyn_i->want_plt2 = 0; 2790 } 2791 } 2792 return true; 2793} 2794 2795/* Allocate all the full PLT entries. */ 2796 2797static bool 2798allocate_plt2_entries (struct elfNN_ia64_dyn_sym_info *dyn_i, 2799 void * data) 2800{ 2801 struct elfNN_ia64_allocate_data *x = (struct elfNN_ia64_allocate_data *)data; 2802 2803 if (dyn_i->want_plt2) 2804 { 2805 struct elf_link_hash_entry *h = dyn_i->h; 2806 bfd_size_type ofs = x->ofs; 2807 2808 dyn_i->plt2_offset = ofs; 2809 x->ofs = ofs + PLT_FULL_ENTRY_SIZE; 2810 2811 while (h->root.type == bfd_link_hash_indirect 2812 || h->root.type == bfd_link_hash_warning) 2813 h = (struct elf_link_hash_entry *) h->root.u.i.link; 2814 dyn_i->h->plt.offset = ofs; 2815 } 2816 return true; 2817} 2818 2819/* Allocate all the PLTOFF entries requested by relocations and 2820 plt entries. We can't share space with allocated FPTR entries, 2821 because the latter are not necessarily addressable by the GP. 2822 ??? Relaxation might be able to determine that they are. */ 2823 2824static bool 2825allocate_pltoff_entries (struct elfNN_ia64_dyn_sym_info *dyn_i, 2826 void * data) 2827{ 2828 struct elfNN_ia64_allocate_data *x = (struct elfNN_ia64_allocate_data *)data; 2829 2830 if (dyn_i->want_pltoff) 2831 { 2832 dyn_i->pltoff_offset = x->ofs; 2833 x->ofs += 16; 2834 } 2835 return true; 2836} 2837 2838/* Allocate dynamic relocations for those symbols that turned out 2839 to be dynamic. */ 2840 2841static bool 2842allocate_dynrel_entries (struct elfNN_ia64_dyn_sym_info *dyn_i, 2843 void * data) 2844{ 2845 struct elfNN_ia64_allocate_data *x = (struct elfNN_ia64_allocate_data *)data; 2846 struct elfNN_ia64_link_hash_table *ia64_info; 2847 struct elfNN_ia64_dyn_reloc_entry *rent; 2848 bool dynamic_symbol, shared, resolved_zero; 2849 2850 ia64_info = elfNN_ia64_hash_table (x->info); 2851 if (ia64_info == NULL) 2852 return false; 2853 2854 /* Note that this can't be used in relation to FPTR relocs below. */ 2855 dynamic_symbol = elfNN_ia64_dynamic_symbol_p (dyn_i->h, x->info, 0); 2856 2857 shared = bfd_link_pic (x->info); 2858 resolved_zero = (dyn_i->h 2859 && ELF_ST_VISIBILITY (dyn_i->h->other) 2860 && dyn_i->h->root.type == bfd_link_hash_undefweak); 2861 2862 /* Take care of the GOT and PLT relocations. */ 2863 2864 if ((!resolved_zero 2865 && (dynamic_symbol || shared) 2866 && (dyn_i->want_got || dyn_i->want_gotx)) 2867 || (dyn_i->want_ltoff_fptr 2868 && dyn_i->h 2869 && dyn_i->h->dynindx != -1)) 2870 { 2871 if (!dyn_i->want_ltoff_fptr 2872 || !bfd_link_pie (x->info) 2873 || dyn_i->h == NULL 2874 || dyn_i->h->root.type != bfd_link_hash_undefweak) 2875 ia64_info->root.srelgot->size += sizeof (ElfNN_External_Rela); 2876 } 2877 if ((dynamic_symbol || shared) && dyn_i->want_tprel) 2878 ia64_info->root.srelgot->size += sizeof (ElfNN_External_Rela); 2879 if (dynamic_symbol && dyn_i->want_dtpmod) 2880 ia64_info->root.srelgot->size += sizeof (ElfNN_External_Rela); 2881 if (dynamic_symbol && dyn_i->want_dtprel) 2882 ia64_info->root.srelgot->size += sizeof (ElfNN_External_Rela); 2883 2884 if (x->only_got) 2885 return true; 2886 2887 if (ia64_info->rel_fptr_sec && dyn_i->want_fptr) 2888 { 2889 if (dyn_i->h == NULL || dyn_i->h->root.type != bfd_link_hash_undefweak) 2890 ia64_info->rel_fptr_sec->size += sizeof (ElfNN_External_Rela); 2891 } 2892 2893 if (!resolved_zero && dyn_i->want_pltoff) 2894 { 2895 bfd_size_type t = 0; 2896 2897 /* Dynamic symbols get one IPLT relocation. Local symbols in 2898 shared libraries get two REL relocations. Local symbols in 2899 main applications get nothing. */ 2900 if (dynamic_symbol) 2901 t = sizeof (ElfNN_External_Rela); 2902 else if (shared) 2903 t = 2 * sizeof (ElfNN_External_Rela); 2904 2905 ia64_info->rel_pltoff_sec->size += t; 2906 } 2907 2908 /* Take care of the normal data relocations. */ 2909 2910 for (rent = dyn_i->reloc_entries; rent; rent = rent->next) 2911 { 2912 int count = rent->count; 2913 2914 switch (rent->type) 2915 { 2916 case R_IA64_FPTR32LSB: 2917 case R_IA64_FPTR64LSB: 2918 /* Allocate one iff !want_fptr and not PIE, which by this point 2919 will be true only if we're actually allocating one statically 2920 in the main executable. Position independent executables 2921 need a relative reloc. */ 2922 if (dyn_i->want_fptr && !bfd_link_pie (x->info)) 2923 continue; 2924 break; 2925 case R_IA64_PCREL32LSB: 2926 case R_IA64_PCREL64LSB: 2927 if (!dynamic_symbol) 2928 continue; 2929 break; 2930 case R_IA64_DIR32LSB: 2931 case R_IA64_DIR64LSB: 2932 if (!dynamic_symbol && !shared) 2933 continue; 2934 break; 2935 case R_IA64_IPLTLSB: 2936 if (!dynamic_symbol && !shared) 2937 continue; 2938 /* Use two REL relocations for IPLT relocations 2939 against local symbols. */ 2940 if (!dynamic_symbol) 2941 count *= 2; 2942 break; 2943 case R_IA64_DTPREL32LSB: 2944 case R_IA64_TPREL64LSB: 2945 case R_IA64_DTPREL64LSB: 2946 case R_IA64_DTPMOD64LSB: 2947 break; 2948 default: 2949 abort (); 2950 } 2951 if (rent->reltext) 2952 x->info->flags |= DF_TEXTREL; 2953 rent->srel->size += sizeof (ElfNN_External_Rela) * count; 2954 } 2955 2956 return true; 2957} 2958 2959static bool 2960elfNN_ia64_adjust_dynamic_symbol (struct bfd_link_info *info ATTRIBUTE_UNUSED, 2961 struct elf_link_hash_entry *h) 2962{ 2963 /* ??? Undefined symbols with PLT entries should be re-defined 2964 to be the PLT entry. */ 2965 2966 /* If this is a weak symbol, and there is a real definition, the 2967 processor independent code will have arranged for us to see the 2968 real definition first, and we can just use the same value. */ 2969 if (h->is_weakalias) 2970 { 2971 struct elf_link_hash_entry *def = weakdef (h); 2972 BFD_ASSERT (def->root.type == bfd_link_hash_defined); 2973 h->root.u.def.section = def->root.u.def.section; 2974 h->root.u.def.value = def->root.u.def.value; 2975 return true; 2976 } 2977 2978 /* If this is a reference to a symbol defined by a dynamic object which 2979 is not a function, we might allocate the symbol in our .dynbss section 2980 and allocate a COPY dynamic relocation. 2981 2982 But IA-64 code is canonically PIC, so as a rule we can avoid this sort 2983 of hackery. */ 2984 2985 return true; 2986} 2987 2988static bool 2989elfNN_ia64_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, 2990 struct bfd_link_info *info) 2991{ 2992 struct elfNN_ia64_allocate_data data; 2993 struct elfNN_ia64_link_hash_table *ia64_info; 2994 asection *sec; 2995 bfd *dynobj; 2996 2997 ia64_info = elfNN_ia64_hash_table (info); 2998 if (ia64_info == NULL) 2999 return false; 3000 dynobj = ia64_info->root.dynobj; 3001 ia64_info->self_dtpmod_offset = (bfd_vma) -1; 3002 BFD_ASSERT(dynobj != NULL); 3003 data.info = info; 3004 3005 /* Set the contents of the .interp section to the interpreter. */ 3006 if (ia64_info->root.dynamic_sections_created 3007 && bfd_link_executable (info) && !info->nointerp) 3008 { 3009 sec = bfd_get_linker_section (dynobj, ".interp"); 3010 BFD_ASSERT (sec != NULL); 3011 sec->contents = (bfd_byte *) ELF_DYNAMIC_INTERPRETER; 3012 sec->size = strlen (ELF_DYNAMIC_INTERPRETER) + 1; 3013 } 3014 3015 /* Allocate the GOT entries. */ 3016 3017 if (ia64_info->root.sgot) 3018 { 3019 data.ofs = 0; 3020 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_global_data_got, &data); 3021 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_global_fptr_got, &data); 3022 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_local_got, &data); 3023 ia64_info->root.sgot->size = data.ofs; 3024 } 3025 3026 /* Allocate the FPTR entries. */ 3027 3028 if (ia64_info->fptr_sec) 3029 { 3030 data.ofs = 0; 3031 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_fptr, &data); 3032 ia64_info->fptr_sec->size = data.ofs; 3033 } 3034 3035 /* Now that we've seen all of the input files, we can decide which 3036 symbols need plt entries. Allocate the minimal PLT entries first. 3037 We do this even though dynamic_sections_created may be FALSE, because 3038 this has the side-effect of clearing want_plt and want_plt2. */ 3039 3040 data.ofs = 0; 3041 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_plt_entries, &data); 3042 3043 ia64_info->minplt_entries = 0; 3044 if (data.ofs) 3045 { 3046 ia64_info->minplt_entries 3047 = (data.ofs - PLT_HEADER_SIZE) / PLT_MIN_ENTRY_SIZE; 3048 } 3049 3050 /* Align the pointer for the plt2 entries. */ 3051 data.ofs = (data.ofs + 31) & (bfd_vma) -32; 3052 3053 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_plt2_entries, &data); 3054 if (data.ofs != 0 || ia64_info->root.dynamic_sections_created) 3055 { 3056 /* FIXME: we always reserve the memory for dynamic linker even if 3057 there are no PLT entries since dynamic linker may assume the 3058 reserved memory always exists. */ 3059 3060 BFD_ASSERT (ia64_info->root.dynamic_sections_created); 3061 3062 ia64_info->root.splt->size = data.ofs; 3063 3064 /* If we've got a .plt, we need some extra memory for the dynamic 3065 linker. We stuff these in .got.plt. */ 3066 ia64_info->root.sgotplt->size = 8 * PLT_RESERVED_WORDS; 3067 } 3068 3069 /* Allocate the PLTOFF entries. */ 3070 3071 if (ia64_info->pltoff_sec) 3072 { 3073 data.ofs = 0; 3074 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_pltoff_entries, &data); 3075 ia64_info->pltoff_sec->size = data.ofs; 3076 } 3077 3078 if (ia64_info->root.dynamic_sections_created) 3079 { 3080 /* Allocate space for the dynamic relocations that turned out to be 3081 required. */ 3082 3083 if (bfd_link_pic (info) && ia64_info->self_dtpmod_offset != (bfd_vma) -1) 3084 ia64_info->root.srelgot->size += sizeof (ElfNN_External_Rela); 3085 data.only_got = false; 3086 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_dynrel_entries, &data); 3087 } 3088 3089 /* We have now determined the sizes of the various dynamic sections. 3090 Allocate memory for them. */ 3091 for (sec = dynobj->sections; sec != NULL; sec = sec->next) 3092 { 3093 bool strip; 3094 3095 if (!(sec->flags & SEC_LINKER_CREATED)) 3096 continue; 3097 3098 /* If we don't need this section, strip it from the output file. 3099 There were several sections primarily related to dynamic 3100 linking that must be create before the linker maps input 3101 sections to output sections. The linker does that before 3102 bfd_elf_size_dynamic_sections is called, and it is that 3103 function which decides whether anything needs to go into 3104 these sections. */ 3105 3106 strip = (sec->size == 0); 3107 3108 if (sec == ia64_info->root.sgot) 3109 strip = false; 3110 else if (sec == ia64_info->root.srelgot) 3111 { 3112 if (strip) 3113 ia64_info->root.srelgot = NULL; 3114 else 3115 /* We use the reloc_count field as a counter if we need to 3116 copy relocs into the output file. */ 3117 sec->reloc_count = 0; 3118 } 3119 else if (sec == ia64_info->fptr_sec) 3120 { 3121 if (strip) 3122 ia64_info->fptr_sec = NULL; 3123 } 3124 else if (sec == ia64_info->rel_fptr_sec) 3125 { 3126 if (strip) 3127 ia64_info->rel_fptr_sec = NULL; 3128 else 3129 /* We use the reloc_count field as a counter if we need to 3130 copy relocs into the output file. */ 3131 sec->reloc_count = 0; 3132 } 3133 else if (sec == ia64_info->root.splt) 3134 { 3135 if (strip) 3136 ia64_info->root.splt = NULL; 3137 } 3138 else if (sec == ia64_info->pltoff_sec) 3139 { 3140 if (strip) 3141 ia64_info->pltoff_sec = NULL; 3142 } 3143 else if (sec == ia64_info->rel_pltoff_sec) 3144 { 3145 if (strip) 3146 ia64_info->rel_pltoff_sec = NULL; 3147 else 3148 { 3149 ia64_info->root.dt_jmprel_required = true; 3150 /* We use the reloc_count field as a counter if we need to 3151 copy relocs into the output file. */ 3152 sec->reloc_count = 0; 3153 } 3154 } 3155 else 3156 { 3157 const char *name; 3158 3159 /* It's OK to base decisions on the section name, because none 3160 of the dynobj section names depend upon the input files. */ 3161 name = bfd_section_name (sec); 3162 3163 if (strcmp (name, ".got.plt") == 0) 3164 strip = false; 3165 else if (startswith (name, ".rel")) 3166 { 3167 if (!strip) 3168 { 3169 /* We use the reloc_count field as a counter if we need to 3170 copy relocs into the output file. */ 3171 sec->reloc_count = 0; 3172 } 3173 } 3174 else 3175 continue; 3176 } 3177 3178 if (strip) 3179 sec->flags |= SEC_EXCLUDE; 3180 else 3181 { 3182 /* Allocate memory for the section contents. */ 3183 sec->contents = (bfd_byte *) bfd_zalloc (dynobj, sec->size); 3184 if (sec->contents == NULL && sec->size != 0) 3185 return false; 3186 } 3187 } 3188 3189 if (ia64_info->root.dynamic_sections_created) 3190 { 3191 /* Add some entries to the .dynamic section. We fill in the values 3192 later (in finish_dynamic_sections) but we must add the entries now 3193 so that we get the correct size for the .dynamic section. */ 3194 3195#define add_dynamic_entry(TAG, VAL) \ 3196 _bfd_elf_add_dynamic_entry (info, TAG, VAL) 3197 3198 if (!_bfd_elf_add_dynamic_tags (output_bfd, info, true)) 3199 return false; 3200 3201 if (!add_dynamic_entry (DT_IA_64_PLT_RESERVE, 0)) 3202 return false; 3203 } 3204 3205 /* ??? Perhaps force __gp local. */ 3206 3207 return true; 3208} 3209 3210static void 3211elfNN_ia64_install_dyn_reloc (bfd *abfd, struct bfd_link_info *info, 3212 asection *sec, asection *srel, 3213 bfd_vma offset, unsigned int type, 3214 long dynindx, bfd_vma addend) 3215{ 3216 Elf_Internal_Rela outrel; 3217 bfd_byte *loc; 3218 3219 BFD_ASSERT (dynindx != -1); 3220 outrel.r_info = ELFNN_R_INFO (dynindx, type); 3221 outrel.r_addend = addend; 3222 outrel.r_offset = _bfd_elf_section_offset (abfd, info, sec, offset); 3223 if (outrel.r_offset >= (bfd_vma) -2) 3224 { 3225 /* Run for the hills. We shouldn't be outputting a relocation 3226 for this. So do what everyone else does and output a no-op. */ 3227 outrel.r_info = ELFNN_R_INFO (0, R_IA64_NONE); 3228 outrel.r_addend = 0; 3229 outrel.r_offset = 0; 3230 } 3231 else 3232 outrel.r_offset += sec->output_section->vma + sec->output_offset; 3233 3234 loc = srel->contents; 3235 loc += srel->reloc_count++ * sizeof (ElfNN_External_Rela); 3236 bfd_elfNN_swap_reloca_out (abfd, &outrel, loc); 3237 BFD_ASSERT (sizeof (ElfNN_External_Rela) * srel->reloc_count <= srel->size); 3238} 3239 3240/* Store an entry for target address TARGET_ADDR in the linkage table 3241 and return the gp-relative address of the linkage table entry. */ 3242 3243static bfd_vma 3244set_got_entry (bfd *abfd, struct bfd_link_info *info, 3245 struct elfNN_ia64_dyn_sym_info *dyn_i, 3246 long dynindx, bfd_vma addend, bfd_vma value, 3247 unsigned int dyn_r_type) 3248{ 3249 struct elfNN_ia64_link_hash_table *ia64_info; 3250 asection *got_sec; 3251 bool done; 3252 bfd_vma got_offset; 3253 3254 ia64_info = elfNN_ia64_hash_table (info); 3255 if (ia64_info == NULL) 3256 return 0; 3257 3258 got_sec = ia64_info->root.sgot; 3259 3260 switch (dyn_r_type) 3261 { 3262 case R_IA64_TPREL64LSB: 3263 done = dyn_i->tprel_done; 3264 dyn_i->tprel_done = true; 3265 got_offset = dyn_i->tprel_offset; 3266 break; 3267 case R_IA64_DTPMOD64LSB: 3268 if (dyn_i->dtpmod_offset != ia64_info->self_dtpmod_offset) 3269 { 3270 done = dyn_i->dtpmod_done; 3271 dyn_i->dtpmod_done = true; 3272 } 3273 else 3274 { 3275 done = ia64_info->self_dtpmod_done; 3276 ia64_info->self_dtpmod_done = true; 3277 dynindx = 0; 3278 } 3279 got_offset = dyn_i->dtpmod_offset; 3280 break; 3281 case R_IA64_DTPREL32LSB: 3282 case R_IA64_DTPREL64LSB: 3283 done = dyn_i->dtprel_done; 3284 dyn_i->dtprel_done = true; 3285 got_offset = dyn_i->dtprel_offset; 3286 break; 3287 default: 3288 done = dyn_i->got_done; 3289 dyn_i->got_done = true; 3290 got_offset = dyn_i->got_offset; 3291 break; 3292 } 3293 3294 BFD_ASSERT ((got_offset & 7) == 0); 3295 3296 if (! done) 3297 { 3298 /* Store the target address in the linkage table entry. */ 3299 bfd_put_64 (abfd, value, got_sec->contents + got_offset); 3300 3301 /* Install a dynamic relocation if needed. */ 3302 if (((bfd_link_pic (info) 3303 && (!dyn_i->h 3304 || ELF_ST_VISIBILITY (dyn_i->h->other) == STV_DEFAULT 3305 || dyn_i->h->root.type != bfd_link_hash_undefweak) 3306 && dyn_r_type != R_IA64_DTPREL32LSB 3307 && dyn_r_type != R_IA64_DTPREL64LSB) 3308 || elfNN_ia64_dynamic_symbol_p (dyn_i->h, info, dyn_r_type) 3309 || (dynindx != -1 3310 && (dyn_r_type == R_IA64_FPTR32LSB 3311 || dyn_r_type == R_IA64_FPTR64LSB))) 3312 && (!dyn_i->want_ltoff_fptr 3313 || !bfd_link_pie (info) 3314 || !dyn_i->h 3315 || dyn_i->h->root.type != bfd_link_hash_undefweak)) 3316 { 3317 if (dynindx == -1 3318 && dyn_r_type != R_IA64_TPREL64LSB 3319 && dyn_r_type != R_IA64_DTPMOD64LSB 3320 && dyn_r_type != R_IA64_DTPREL32LSB 3321 && dyn_r_type != R_IA64_DTPREL64LSB) 3322 { 3323 dyn_r_type = R_IA64_RELNNLSB; 3324 dynindx = 0; 3325 addend = value; 3326 } 3327 3328 if (bfd_big_endian (abfd)) 3329 { 3330 switch (dyn_r_type) 3331 { 3332 case R_IA64_REL32LSB: 3333 dyn_r_type = R_IA64_REL32MSB; 3334 break; 3335 case R_IA64_DIR32LSB: 3336 dyn_r_type = R_IA64_DIR32MSB; 3337 break; 3338 case R_IA64_FPTR32LSB: 3339 dyn_r_type = R_IA64_FPTR32MSB; 3340 break; 3341 case R_IA64_DTPREL32LSB: 3342 dyn_r_type = R_IA64_DTPREL32MSB; 3343 break; 3344 case R_IA64_REL64LSB: 3345 dyn_r_type = R_IA64_REL64MSB; 3346 break; 3347 case R_IA64_DIR64LSB: 3348 dyn_r_type = R_IA64_DIR64MSB; 3349 break; 3350 case R_IA64_FPTR64LSB: 3351 dyn_r_type = R_IA64_FPTR64MSB; 3352 break; 3353 case R_IA64_TPREL64LSB: 3354 dyn_r_type = R_IA64_TPREL64MSB; 3355 break; 3356 case R_IA64_DTPMOD64LSB: 3357 dyn_r_type = R_IA64_DTPMOD64MSB; 3358 break; 3359 case R_IA64_DTPREL64LSB: 3360 dyn_r_type = R_IA64_DTPREL64MSB; 3361 break; 3362 default: 3363 BFD_ASSERT (false); 3364 break; 3365 } 3366 } 3367 3368 elfNN_ia64_install_dyn_reloc (abfd, NULL, got_sec, 3369 ia64_info->root.srelgot, 3370 got_offset, dyn_r_type, 3371 dynindx, addend); 3372 } 3373 } 3374 3375 /* Return the address of the linkage table entry. */ 3376 value = (got_sec->output_section->vma 3377 + got_sec->output_offset 3378 + got_offset); 3379 3380 return value; 3381} 3382 3383/* Fill in a function descriptor consisting of the function's code 3384 address and its global pointer. Return the descriptor's address. */ 3385 3386static bfd_vma 3387set_fptr_entry (bfd *abfd, struct bfd_link_info *info, 3388 struct elfNN_ia64_dyn_sym_info *dyn_i, 3389 bfd_vma value) 3390{ 3391 struct elfNN_ia64_link_hash_table *ia64_info; 3392 asection *fptr_sec; 3393 3394 ia64_info = elfNN_ia64_hash_table (info); 3395 if (ia64_info == NULL) 3396 return 0; 3397 3398 fptr_sec = ia64_info->fptr_sec; 3399 3400 if (!dyn_i->fptr_done) 3401 { 3402 dyn_i->fptr_done = 1; 3403 3404 /* Fill in the function descriptor. */ 3405 bfd_put_64 (abfd, value, fptr_sec->contents + dyn_i->fptr_offset); 3406 bfd_put_64 (abfd, _bfd_get_gp_value (abfd), 3407 fptr_sec->contents + dyn_i->fptr_offset + 8); 3408 if (ia64_info->rel_fptr_sec) 3409 { 3410 Elf_Internal_Rela outrel; 3411 bfd_byte *loc; 3412 3413 if (bfd_little_endian (abfd)) 3414 outrel.r_info = ELFNN_R_INFO (0, R_IA64_IPLTLSB); 3415 else 3416 outrel.r_info = ELFNN_R_INFO (0, R_IA64_IPLTMSB); 3417 outrel.r_addend = value; 3418 outrel.r_offset = (fptr_sec->output_section->vma 3419 + fptr_sec->output_offset 3420 + dyn_i->fptr_offset); 3421 loc = ia64_info->rel_fptr_sec->contents; 3422 loc += ia64_info->rel_fptr_sec->reloc_count++ 3423 * sizeof (ElfNN_External_Rela); 3424 bfd_elfNN_swap_reloca_out (abfd, &outrel, loc); 3425 } 3426 } 3427 3428 /* Return the descriptor's address. */ 3429 value = (fptr_sec->output_section->vma 3430 + fptr_sec->output_offset 3431 + dyn_i->fptr_offset); 3432 3433 return value; 3434} 3435 3436/* Fill in a PLTOFF entry consisting of the function's code address 3437 and its global pointer. Return the descriptor's address. */ 3438 3439static bfd_vma 3440set_pltoff_entry (bfd *abfd, struct bfd_link_info *info, 3441 struct elfNN_ia64_dyn_sym_info *dyn_i, 3442 bfd_vma value, bool is_plt) 3443{ 3444 struct elfNN_ia64_link_hash_table *ia64_info; 3445 asection *pltoff_sec; 3446 3447 ia64_info = elfNN_ia64_hash_table (info); 3448 if (ia64_info == NULL) 3449 return 0; 3450 3451 pltoff_sec = ia64_info->pltoff_sec; 3452 3453 /* Don't do anything if this symbol uses a real PLT entry. In 3454 that case, we'll fill this in during finish_dynamic_symbol. */ 3455 if ((! dyn_i->want_plt || is_plt) 3456 && !dyn_i->pltoff_done) 3457 { 3458 bfd_vma gp = _bfd_get_gp_value (abfd); 3459 3460 /* Fill in the function descriptor. */ 3461 bfd_put_64 (abfd, value, pltoff_sec->contents + dyn_i->pltoff_offset); 3462 bfd_put_64 (abfd, gp, pltoff_sec->contents + dyn_i->pltoff_offset + 8); 3463 3464 /* Install dynamic relocations if needed. */ 3465 if (!is_plt 3466 && bfd_link_pic (info) 3467 && (!dyn_i->h 3468 || ELF_ST_VISIBILITY (dyn_i->h->other) == STV_DEFAULT 3469 || dyn_i->h->root.type != bfd_link_hash_undefweak)) 3470 { 3471 unsigned int dyn_r_type; 3472 3473 if (bfd_big_endian (abfd)) 3474 dyn_r_type = R_IA64_RELNNMSB; 3475 else 3476 dyn_r_type = R_IA64_RELNNLSB; 3477 3478 elfNN_ia64_install_dyn_reloc (abfd, NULL, pltoff_sec, 3479 ia64_info->rel_pltoff_sec, 3480 dyn_i->pltoff_offset, 3481 dyn_r_type, 0, value); 3482 elfNN_ia64_install_dyn_reloc (abfd, NULL, pltoff_sec, 3483 ia64_info->rel_pltoff_sec, 3484 dyn_i->pltoff_offset + ARCH_SIZE / 8, 3485 dyn_r_type, 0, gp); 3486 } 3487 3488 dyn_i->pltoff_done = 1; 3489 } 3490 3491 /* Return the descriptor's address. */ 3492 value = (pltoff_sec->output_section->vma 3493 + pltoff_sec->output_offset 3494 + dyn_i->pltoff_offset); 3495 3496 return value; 3497} 3498 3499/* Return the base VMA address which should be subtracted from real addresses 3500 when resolving @tprel() relocation. 3501 Main program TLS (whose template starts at PT_TLS p_vaddr) 3502 is assigned offset round(2 * size of pointer, PT_TLS p_align). */ 3503 3504static bfd_vma 3505elfNN_ia64_tprel_base (struct bfd_link_info *info) 3506{ 3507 asection *tls_sec = elf_hash_table (info)->tls_sec; 3508 return tls_sec->vma - align_power ((bfd_vma) ARCH_SIZE / 4, 3509 tls_sec->alignment_power); 3510} 3511 3512/* Return the base VMA address which should be subtracted from real addresses 3513 when resolving @dtprel() relocation. 3514 This is PT_TLS segment p_vaddr. */ 3515 3516static bfd_vma 3517elfNN_ia64_dtprel_base (struct bfd_link_info *info) 3518{ 3519 return elf_hash_table (info)->tls_sec->vma; 3520} 3521 3522/* Called through qsort to sort the .IA_64.unwind section during a 3523 non-relocatable link. Set elfNN_ia64_unwind_entry_compare_bfd 3524 to the output bfd so we can do proper endianness frobbing. */ 3525 3526static bfd *elfNN_ia64_unwind_entry_compare_bfd; 3527 3528static int 3529elfNN_ia64_unwind_entry_compare (const void * a, const void * b) 3530{ 3531 bfd_vma av, bv; 3532 3533 av = bfd_get_64 (elfNN_ia64_unwind_entry_compare_bfd, a); 3534 bv = bfd_get_64 (elfNN_ia64_unwind_entry_compare_bfd, b); 3535 3536 return (av < bv ? -1 : av > bv ? 1 : 0); 3537} 3538 3539/* Make sure we've got ourselves a nice fat __gp value. */ 3540static bool 3541elfNN_ia64_choose_gp (bfd *abfd, struct bfd_link_info *info, bool final) 3542{ 3543 bfd_vma min_vma = (bfd_vma) -1, max_vma = 0; 3544 bfd_vma min_short_vma = min_vma, max_short_vma = 0; 3545 struct elf_link_hash_entry *gp; 3546 bfd_vma gp_val; 3547 asection *os; 3548 struct elfNN_ia64_link_hash_table *ia64_info; 3549 3550 ia64_info = elfNN_ia64_hash_table (info); 3551 if (ia64_info == NULL) 3552 return false; 3553 3554 /* Find the min and max vma of all sections marked short. Also collect 3555 min and max vma of any type, for use in selecting a nice gp. */ 3556 for (os = abfd->sections; os ; os = os->next) 3557 { 3558 bfd_vma lo, hi; 3559 3560 if ((os->flags & SEC_ALLOC) == 0) 3561 continue; 3562 3563 lo = os->vma; 3564 /* When this function is called from elfNN_ia64_final_link 3565 the correct value to use is os->size. When called from 3566 elfNN_ia64_relax_section we are in the middle of section 3567 sizing; some sections will already have os->size set, others 3568 will have os->size zero and os->rawsize the previous size. */ 3569 hi = os->vma + (!final && os->rawsize ? os->rawsize : os->size); 3570 if (hi < lo) 3571 hi = (bfd_vma) -1; 3572 3573 if (min_vma > lo) 3574 min_vma = lo; 3575 if (max_vma < hi) 3576 max_vma = hi; 3577 if (os->flags & SEC_SMALL_DATA) 3578 { 3579 if (min_short_vma > lo) 3580 min_short_vma = lo; 3581 if (max_short_vma < hi) 3582 max_short_vma = hi; 3583 } 3584 } 3585 3586 if (ia64_info->min_short_sec) 3587 { 3588 if (min_short_vma 3589 > (ia64_info->min_short_sec->vma 3590 + ia64_info->min_short_offset)) 3591 min_short_vma = (ia64_info->min_short_sec->vma 3592 + ia64_info->min_short_offset); 3593 if (max_short_vma 3594 < (ia64_info->max_short_sec->vma 3595 + ia64_info->max_short_offset)) 3596 max_short_vma = (ia64_info->max_short_sec->vma 3597 + ia64_info->max_short_offset); 3598 } 3599 3600 /* See if the user wants to force a value. */ 3601 gp = elf_link_hash_lookup (elf_hash_table (info), "__gp", false, 3602 false, false); 3603 3604 if (gp 3605 && (gp->root.type == bfd_link_hash_defined 3606 || gp->root.type == bfd_link_hash_defweak)) 3607 { 3608 asection *gp_sec = gp->root.u.def.section; 3609 gp_val = (gp->root.u.def.value 3610 + gp_sec->output_section->vma 3611 + gp_sec->output_offset); 3612 } 3613 else 3614 { 3615 /* Pick a sensible value. */ 3616 3617 if (ia64_info->min_short_sec) 3618 { 3619 bfd_vma short_range = max_short_vma - min_short_vma; 3620 3621 /* If min_short_sec is set, pick one in the middle bewteen 3622 min_short_vma and max_short_vma. */ 3623 if (short_range >= 0x400000) 3624 goto overflow; 3625 gp_val = min_short_vma + short_range / 2; 3626 } 3627 else 3628 { 3629 asection *got_sec = ia64_info->root.sgot; 3630 3631 /* Start with just the address of the .got. */ 3632 if (got_sec) 3633 gp_val = got_sec->output_section->vma; 3634 else if (max_short_vma != 0) 3635 gp_val = min_short_vma; 3636 else if (max_vma - min_vma < 0x200000) 3637 gp_val = min_vma; 3638 else 3639 gp_val = max_vma - 0x200000 + 8; 3640 } 3641 3642 /* If it is possible to address the entire image, but we 3643 don't with the choice above, adjust. */ 3644 if (max_vma - min_vma < 0x400000 3645 && (max_vma - gp_val >= 0x200000 3646 || gp_val - min_vma > 0x200000)) 3647 gp_val = min_vma + 0x200000; 3648 else if (max_short_vma != 0) 3649 { 3650 /* If we don't cover all the short data, adjust. */ 3651 if (max_short_vma - gp_val >= 0x200000) 3652 gp_val = min_short_vma + 0x200000; 3653 3654 /* If we're addressing stuff past the end, adjust back. */ 3655 if (gp_val > max_vma) 3656 gp_val = max_vma - 0x200000 + 8; 3657 } 3658 } 3659 3660 /* Validate whether all SHF_IA_64_SHORT sections are within 3661 range of the chosen GP. */ 3662 3663 if (max_short_vma != 0) 3664 { 3665 if (max_short_vma - min_short_vma >= 0x400000) 3666 { 3667 overflow: 3668 _bfd_error_handler 3669 /* xgettext:c-format */ 3670 (_("%pB: short data segment overflowed (%#" PRIx64 " >= 0x400000)"), 3671 abfd, (uint64_t) (max_short_vma - min_short_vma)); 3672 return false; 3673 } 3674 else if ((gp_val > min_short_vma 3675 && gp_val - min_short_vma > 0x200000) 3676 || (gp_val < max_short_vma 3677 && max_short_vma - gp_val >= 0x200000)) 3678 { 3679 _bfd_error_handler 3680 (_("%pB: __gp does not cover short data segment"), abfd); 3681 return false; 3682 } 3683 } 3684 3685 _bfd_set_gp_value (abfd, gp_val); 3686 3687 return true; 3688} 3689 3690static bool 3691elfNN_ia64_final_link (bfd *abfd, struct bfd_link_info *info) 3692{ 3693 struct elfNN_ia64_link_hash_table *ia64_info; 3694 asection *unwind_output_sec; 3695 3696 ia64_info = elfNN_ia64_hash_table (info); 3697 if (ia64_info == NULL) 3698 return false; 3699 3700 /* Make sure we've got ourselves a nice fat __gp value. */ 3701 if (!bfd_link_relocatable (info)) 3702 { 3703 bfd_vma gp_val; 3704 struct elf_link_hash_entry *gp; 3705 3706 /* We assume after gp is set, section size will only decrease. We 3707 need to adjust gp for it. */ 3708 _bfd_set_gp_value (abfd, 0); 3709 if (! elfNN_ia64_choose_gp (abfd, info, true)) 3710 return false; 3711 gp_val = _bfd_get_gp_value (abfd); 3712 3713 gp = elf_link_hash_lookup (elf_hash_table (info), "__gp", false, 3714 false, false); 3715 if (gp) 3716 { 3717 gp->root.type = bfd_link_hash_defined; 3718 gp->root.u.def.value = gp_val; 3719 gp->root.u.def.section = bfd_abs_section_ptr; 3720 } 3721 } 3722 3723 /* If we're producing a final executable, we need to sort the contents 3724 of the .IA_64.unwind section. Force this section to be relocated 3725 into memory rather than written immediately to the output file. */ 3726 unwind_output_sec = NULL; 3727 if (!bfd_link_relocatable (info)) 3728 { 3729 asection *s = bfd_get_section_by_name (abfd, ELF_STRING_ia64_unwind); 3730 if (s) 3731 { 3732 unwind_output_sec = s->output_section; 3733 unwind_output_sec->contents 3734 = bfd_malloc (unwind_output_sec->size); 3735 if (unwind_output_sec->contents == NULL) 3736 return false; 3737 } 3738 } 3739 3740 /* Invoke the regular ELF backend linker to do all the work. */ 3741 if (!bfd_elf_final_link (abfd, info)) 3742 return false; 3743 3744 if (unwind_output_sec) 3745 { 3746 elfNN_ia64_unwind_entry_compare_bfd = abfd; 3747 qsort (unwind_output_sec->contents, 3748 (size_t) (unwind_output_sec->size / 24), 3749 24, 3750 elfNN_ia64_unwind_entry_compare); 3751 3752 if (! bfd_set_section_contents (abfd, unwind_output_sec, 3753 unwind_output_sec->contents, (bfd_vma) 0, 3754 unwind_output_sec->size)) 3755 return false; 3756 } 3757 3758 return true; 3759} 3760 3761static int 3762elfNN_ia64_relocate_section (bfd *output_bfd, 3763 struct bfd_link_info *info, 3764 bfd *input_bfd, 3765 asection *input_section, 3766 bfd_byte *contents, 3767 Elf_Internal_Rela *relocs, 3768 Elf_Internal_Sym *local_syms, 3769 asection **local_sections) 3770{ 3771 struct elfNN_ia64_link_hash_table *ia64_info; 3772 Elf_Internal_Shdr *symtab_hdr; 3773 Elf_Internal_Rela *rel; 3774 Elf_Internal_Rela *relend; 3775 asection *srel; 3776 bool ret_val = true; /* for non-fatal errors */ 3777 bfd_vma gp_val; 3778 3779 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; 3780 ia64_info = elfNN_ia64_hash_table (info); 3781 if (ia64_info == NULL) 3782 return false; 3783 3784 /* Infect various flags from the input section to the output section. */ 3785 if (bfd_link_relocatable (info)) 3786 { 3787 bfd_vma flags; 3788 3789 flags = elf_section_data(input_section)->this_hdr.sh_flags; 3790 flags &= SHF_IA_64_NORECOV; 3791 3792 elf_section_data(input_section->output_section) 3793 ->this_hdr.sh_flags |= flags; 3794 } 3795 3796 gp_val = _bfd_get_gp_value (output_bfd); 3797 srel = get_reloc_section (input_bfd, ia64_info, input_section, false); 3798 3799 rel = relocs; 3800 relend = relocs + input_section->reloc_count; 3801 for (; rel < relend; ++rel) 3802 { 3803 struct elf_link_hash_entry *h; 3804 struct elfNN_ia64_dyn_sym_info *dyn_i; 3805 bfd_reloc_status_type r; 3806 reloc_howto_type *howto; 3807 unsigned long r_symndx; 3808 Elf_Internal_Sym *sym; 3809 unsigned int r_type; 3810 bfd_vma value; 3811 asection *sym_sec; 3812 bfd_byte *hit_addr; 3813 bool dynamic_symbol_p; 3814 bool undef_weak_ref; 3815 3816 r_type = ELFNN_R_TYPE (rel->r_info); 3817 if (r_type > R_IA64_MAX_RELOC_CODE) 3818 { 3819 /* xgettext:c-format */ 3820 _bfd_error_handler (_("%pB: unsupported relocation type %#x"), 3821 input_bfd, (int) r_type); 3822 bfd_set_error (bfd_error_bad_value); 3823 ret_val = false; 3824 continue; 3825 } 3826 3827 howto = ia64_elf_lookup_howto (r_type); 3828 if (howto == NULL) 3829 { 3830 ret_val = false; 3831 continue; 3832 } 3833 3834 r_symndx = ELFNN_R_SYM (rel->r_info); 3835 h = NULL; 3836 sym = NULL; 3837 sym_sec = NULL; 3838 undef_weak_ref = false; 3839 3840 if (r_symndx < symtab_hdr->sh_info) 3841 { 3842 /* Reloc against local symbol. */ 3843 asection *msec; 3844 sym = local_syms + r_symndx; 3845 sym_sec = local_sections[r_symndx]; 3846 msec = sym_sec; 3847 value = _bfd_elf_rela_local_sym (output_bfd, sym, &msec, rel); 3848 if (!bfd_link_relocatable (info) 3849 && (sym_sec->flags & SEC_MERGE) != 0 3850 && ELF_ST_TYPE (sym->st_info) == STT_SECTION 3851 && sym_sec->sec_info_type == SEC_INFO_TYPE_MERGE) 3852 { 3853 struct elfNN_ia64_local_hash_entry *loc_h; 3854 3855 loc_h = get_local_sym_hash (ia64_info, input_bfd, rel, false); 3856 if (loc_h && ! loc_h->sec_merge_done) 3857 { 3858 struct elfNN_ia64_dyn_sym_info *dynent; 3859 unsigned int count; 3860 3861 for (count = loc_h->count, dynent = loc_h->info; 3862 count != 0; 3863 count--, dynent++) 3864 { 3865 msec = sym_sec; 3866 dynent->addend = 3867 _bfd_merged_section_offset (output_bfd, &msec, 3868 elf_section_data (msec)-> 3869 sec_info, 3870 sym->st_value 3871 + dynent->addend); 3872 dynent->addend -= sym->st_value; 3873 dynent->addend += msec->output_section->vma 3874 + msec->output_offset 3875 - sym_sec->output_section->vma 3876 - sym_sec->output_offset; 3877 } 3878 3879 /* We may have introduced duplicated entries. We need 3880 to remove them properly. */ 3881 count = sort_dyn_sym_info (loc_h->info, loc_h->count); 3882 if (count != loc_h->count) 3883 { 3884 loc_h->count = count; 3885 loc_h->sorted_count = count; 3886 } 3887 3888 loc_h->sec_merge_done = 1; 3889 } 3890 } 3891 } 3892 else 3893 { 3894 bool unresolved_reloc; 3895 bool warned, ignored; 3896 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd); 3897 3898 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 3899 r_symndx, symtab_hdr, sym_hashes, 3900 h, sym_sec, value, 3901 unresolved_reloc, warned, ignored); 3902 3903 if (h->root.type == bfd_link_hash_undefweak) 3904 undef_weak_ref = true; 3905 else if (warned || (ignored && bfd_link_executable (info))) 3906 continue; 3907 } 3908 3909 if (sym_sec != NULL && discarded_section (sym_sec)) 3910 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, 3911 rel, 1, relend, howto, 0, contents); 3912 3913 if (bfd_link_relocatable (info)) 3914 continue; 3915 3916 hit_addr = contents + rel->r_offset; 3917 value += rel->r_addend; 3918 dynamic_symbol_p = elfNN_ia64_dynamic_symbol_p (h, info, r_type); 3919 3920 switch (r_type) 3921 { 3922 case R_IA64_NONE: 3923 case R_IA64_LDXMOV: 3924 continue; 3925 3926 case R_IA64_IMM14: 3927 case R_IA64_IMM22: 3928 case R_IA64_IMM64: 3929 case R_IA64_DIR32MSB: 3930 case R_IA64_DIR32LSB: 3931 case R_IA64_DIR64MSB: 3932 case R_IA64_DIR64LSB: 3933 /* Install a dynamic relocation for this reloc. */ 3934 if ((dynamic_symbol_p || bfd_link_pic (info)) 3935 && r_symndx != STN_UNDEF 3936 && (input_section->flags & SEC_ALLOC) != 0) 3937 { 3938 unsigned int dyn_r_type; 3939 long dynindx; 3940 bfd_vma addend; 3941 3942 BFD_ASSERT (srel != NULL); 3943 3944 switch (r_type) 3945 { 3946 case R_IA64_IMM14: 3947 case R_IA64_IMM22: 3948 case R_IA64_IMM64: 3949 /* ??? People shouldn't be doing non-pic code in 3950 shared libraries nor dynamic executables. */ 3951 _bfd_error_handler 3952 /* xgettext:c-format */ 3953 (_("%pB: non-pic code with imm relocation against dynamic symbol `%s'"), 3954 input_bfd, 3955 h ? h->root.root.string 3956 : bfd_elf_sym_name (input_bfd, symtab_hdr, sym, 3957 sym_sec)); 3958 ret_val = false; 3959 continue; 3960 3961 default: 3962 break; 3963 } 3964 3965 /* If we don't need dynamic symbol lookup, find a 3966 matching RELATIVE relocation. */ 3967 dyn_r_type = r_type; 3968 if (dynamic_symbol_p) 3969 { 3970 dynindx = h->dynindx; 3971 addend = rel->r_addend; 3972 value = 0; 3973 } 3974 else 3975 { 3976 switch (r_type) 3977 { 3978 case R_IA64_DIR32MSB: 3979 dyn_r_type = R_IA64_REL32MSB; 3980 break; 3981 case R_IA64_DIR32LSB: 3982 dyn_r_type = R_IA64_REL32LSB; 3983 break; 3984 case R_IA64_DIR64MSB: 3985 dyn_r_type = R_IA64_REL64MSB; 3986 break; 3987 case R_IA64_DIR64LSB: 3988 dyn_r_type = R_IA64_REL64LSB; 3989 break; 3990 3991 default: 3992 break; 3993 } 3994 dynindx = 0; 3995 addend = value; 3996 } 3997 3998 elfNN_ia64_install_dyn_reloc (output_bfd, info, input_section, 3999 srel, rel->r_offset, dyn_r_type, 4000 dynindx, addend); 4001 } 4002 /* Fall through. */ 4003 4004 case R_IA64_LTV32MSB: 4005 case R_IA64_LTV32LSB: 4006 case R_IA64_LTV64MSB: 4007 case R_IA64_LTV64LSB: 4008 r = ia64_elf_install_value (hit_addr, value, r_type); 4009 break; 4010 4011 case R_IA64_GPREL22: 4012 case R_IA64_GPREL64I: 4013 case R_IA64_GPREL32MSB: 4014 case R_IA64_GPREL32LSB: 4015 case R_IA64_GPREL64MSB: 4016 case R_IA64_GPREL64LSB: 4017 if (dynamic_symbol_p) 4018 { 4019 _bfd_error_handler 4020 /* xgettext:c-format */ 4021 (_("%pB: @gprel relocation against dynamic symbol %s"), 4022 input_bfd, 4023 h ? h->root.root.string 4024 : bfd_elf_sym_name (input_bfd, symtab_hdr, sym, 4025 sym_sec)); 4026 ret_val = false; 4027 continue; 4028 } 4029 value -= gp_val; 4030 r = ia64_elf_install_value (hit_addr, value, r_type); 4031 break; 4032 4033 case R_IA64_LTOFF22: 4034 case R_IA64_LTOFF22X: 4035 case R_IA64_LTOFF64I: 4036 dyn_i = get_dyn_sym_info (ia64_info, h, input_bfd, rel, false); 4037 value = set_got_entry (input_bfd, info, dyn_i, (h ? h->dynindx : -1), 4038 rel->r_addend, value, R_IA64_DIRNNLSB); 4039 value -= gp_val; 4040 r = ia64_elf_install_value (hit_addr, value, r_type); 4041 break; 4042 4043 case R_IA64_PLTOFF22: 4044 case R_IA64_PLTOFF64I: 4045 case R_IA64_PLTOFF64MSB: 4046 case R_IA64_PLTOFF64LSB: 4047 dyn_i = get_dyn_sym_info (ia64_info, h, input_bfd, rel, false); 4048 value = set_pltoff_entry (output_bfd, info, dyn_i, value, false); 4049 value -= gp_val; 4050 r = ia64_elf_install_value (hit_addr, value, r_type); 4051 break; 4052 4053 case R_IA64_FPTR64I: 4054 case R_IA64_FPTR32MSB: 4055 case R_IA64_FPTR32LSB: 4056 case R_IA64_FPTR64MSB: 4057 case R_IA64_FPTR64LSB: 4058 dyn_i = get_dyn_sym_info (ia64_info, h, input_bfd, rel, false); 4059 if (dyn_i->want_fptr) 4060 { 4061 if (!undef_weak_ref) 4062 value = set_fptr_entry (output_bfd, info, dyn_i, value); 4063 } 4064 if (!dyn_i->want_fptr || bfd_link_pie (info)) 4065 { 4066 long dynindx; 4067 unsigned int dyn_r_type = r_type; 4068 bfd_vma addend = rel->r_addend; 4069 4070 /* Otherwise, we expect the dynamic linker to create 4071 the entry. */ 4072 4073 if (dyn_i->want_fptr) 4074 { 4075 if (r_type == R_IA64_FPTR64I) 4076 { 4077 /* We can't represent this without a dynamic symbol. 4078 Adjust the relocation to be against an output 4079 section symbol, which are always present in the 4080 dynamic symbol table. */ 4081 /* ??? People shouldn't be doing non-pic code in 4082 shared libraries. Hork. */ 4083 _bfd_error_handler 4084 (_("%pB: linking non-pic code in a position independent executable"), 4085 input_bfd); 4086 ret_val = false; 4087 continue; 4088 } 4089 dynindx = 0; 4090 addend = value; 4091 dyn_r_type = r_type + R_IA64_RELNNLSB - R_IA64_FPTRNNLSB; 4092 } 4093 else if (h) 4094 { 4095 if (h->dynindx != -1) 4096 dynindx = h->dynindx; 4097 else 4098 dynindx = (_bfd_elf_link_lookup_local_dynindx 4099 (info, h->root.u.def.section->owner, 4100 global_sym_index (h))); 4101 value = 0; 4102 } 4103 else 4104 { 4105 dynindx = (_bfd_elf_link_lookup_local_dynindx 4106 (info, input_bfd, (long) r_symndx)); 4107 value = 0; 4108 } 4109 4110 elfNN_ia64_install_dyn_reloc (output_bfd, info, input_section, 4111 srel, rel->r_offset, dyn_r_type, 4112 dynindx, addend); 4113 } 4114 4115 r = ia64_elf_install_value (hit_addr, value, r_type); 4116 break; 4117 4118 case R_IA64_LTOFF_FPTR22: 4119 case R_IA64_LTOFF_FPTR64I: 4120 case R_IA64_LTOFF_FPTR32MSB: 4121 case R_IA64_LTOFF_FPTR32LSB: 4122 case R_IA64_LTOFF_FPTR64MSB: 4123 case R_IA64_LTOFF_FPTR64LSB: 4124 { 4125 long dynindx; 4126 4127 dyn_i = get_dyn_sym_info (ia64_info, h, input_bfd, rel, false); 4128 if (dyn_i->want_fptr) 4129 { 4130 BFD_ASSERT (h == NULL || h->dynindx == -1); 4131 if (!undef_weak_ref) 4132 value = set_fptr_entry (output_bfd, info, dyn_i, value); 4133 dynindx = -1; 4134 } 4135 else 4136 { 4137 /* Otherwise, we expect the dynamic linker to create 4138 the entry. */ 4139 if (h) 4140 { 4141 if (h->dynindx != -1) 4142 dynindx = h->dynindx; 4143 else 4144 dynindx = (_bfd_elf_link_lookup_local_dynindx 4145 (info, h->root.u.def.section->owner, 4146 global_sym_index (h))); 4147 } 4148 else 4149 dynindx = (_bfd_elf_link_lookup_local_dynindx 4150 (info, input_bfd, (long) r_symndx)); 4151 value = 0; 4152 } 4153 4154 value = set_got_entry (output_bfd, info, dyn_i, dynindx, 4155 rel->r_addend, value, R_IA64_FPTRNNLSB); 4156 value -= gp_val; 4157 r = ia64_elf_install_value (hit_addr, value, r_type); 4158 } 4159 break; 4160 4161 case R_IA64_PCREL32MSB: 4162 case R_IA64_PCREL32LSB: 4163 case R_IA64_PCREL64MSB: 4164 case R_IA64_PCREL64LSB: 4165 /* Install a dynamic relocation for this reloc. */ 4166 if (dynamic_symbol_p && r_symndx != STN_UNDEF) 4167 { 4168 BFD_ASSERT (srel != NULL); 4169 4170 elfNN_ia64_install_dyn_reloc (output_bfd, info, input_section, 4171 srel, rel->r_offset, r_type, 4172 h->dynindx, rel->r_addend); 4173 } 4174 goto finish_pcrel; 4175 4176 case R_IA64_PCREL21B: 4177 case R_IA64_PCREL60B: 4178 /* We should have created a PLT entry for any dynamic symbol. */ 4179 dyn_i = NULL; 4180 if (h) 4181 dyn_i = get_dyn_sym_info (ia64_info, h, NULL, NULL, false); 4182 4183 if (dyn_i && dyn_i->want_plt2) 4184 { 4185 /* Should have caught this earlier. */ 4186 BFD_ASSERT (rel->r_addend == 0); 4187 4188 value = (ia64_info->root.splt->output_section->vma 4189 + ia64_info->root.splt->output_offset 4190 + dyn_i->plt2_offset); 4191 } 4192 else 4193 { 4194 /* Since there's no PLT entry, Validate that this is 4195 locally defined. */ 4196 BFD_ASSERT (undef_weak_ref || sym_sec->output_section != NULL); 4197 4198 /* If the symbol is undef_weak, we shouldn't be trying 4199 to call it. There's every chance that we'd wind up 4200 with an out-of-range fixup here. Don't bother setting 4201 any value at all. */ 4202 if (undef_weak_ref) 4203 continue; 4204 } 4205 goto finish_pcrel; 4206 4207 case R_IA64_PCREL21BI: 4208 case R_IA64_PCREL21F: 4209 case R_IA64_PCREL21M: 4210 case R_IA64_PCREL22: 4211 case R_IA64_PCREL64I: 4212 /* The PCREL21BI reloc is specifically not intended for use with 4213 dynamic relocs. PCREL21F and PCREL21M are used for speculation 4214 fixup code, and thus probably ought not be dynamic. The 4215 PCREL22 and PCREL64I relocs aren't emitted as dynamic relocs. */ 4216 if (dynamic_symbol_p) 4217 { 4218 const char *msg; 4219 4220 if (r_type == R_IA64_PCREL21BI) 4221 /* xgettext:c-format */ 4222 msg = _("%pB: @internal branch to dynamic symbol %s"); 4223 else if (r_type == R_IA64_PCREL21F || r_type == R_IA64_PCREL21M) 4224 /* xgettext:c-format */ 4225 msg = _("%pB: speculation fixup to dynamic symbol %s"); 4226 else 4227 /* xgettext:c-format */ 4228 msg = _("%pB: @pcrel relocation against dynamic symbol %s"); 4229 _bfd_error_handler (msg, input_bfd, 4230 h ? h->root.root.string 4231 : bfd_elf_sym_name (input_bfd, 4232 symtab_hdr, 4233 sym, 4234 sym_sec)); 4235 ret_val = false; 4236 continue; 4237 } 4238 goto finish_pcrel; 4239 4240 finish_pcrel: 4241 /* Make pc-relative. */ 4242 value -= (input_section->output_section->vma 4243 + input_section->output_offset 4244 + rel->r_offset) & ~ (bfd_vma) 0x3; 4245 r = ia64_elf_install_value (hit_addr, value, r_type); 4246 break; 4247 4248 case R_IA64_SEGREL32MSB: 4249 case R_IA64_SEGREL32LSB: 4250 case R_IA64_SEGREL64MSB: 4251 case R_IA64_SEGREL64LSB: 4252 { 4253 /* Find the segment that contains the output_section. */ 4254 Elf_Internal_Phdr *p = _bfd_elf_find_segment_containing_section 4255 (output_bfd, input_section->output_section); 4256 4257 if (p == NULL) 4258 { 4259 r = bfd_reloc_notsupported; 4260 } 4261 else 4262 { 4263 /* The VMA of the segment is the vaddr of the associated 4264 program header. */ 4265 if (value > p->p_vaddr) 4266 value -= p->p_vaddr; 4267 else 4268 value = 0; 4269 r = ia64_elf_install_value (hit_addr, value, r_type); 4270 } 4271 break; 4272 } 4273 4274 case R_IA64_SECREL32MSB: 4275 case R_IA64_SECREL32LSB: 4276 case R_IA64_SECREL64MSB: 4277 case R_IA64_SECREL64LSB: 4278 /* Make output-section relative to section where the symbol 4279 is defined. PR 475 */ 4280 if (sym_sec) 4281 value -= sym_sec->output_section->vma; 4282 r = ia64_elf_install_value (hit_addr, value, r_type); 4283 break; 4284 4285 case R_IA64_IPLTMSB: 4286 case R_IA64_IPLTLSB: 4287 /* Install a dynamic relocation for this reloc. */ 4288 if ((dynamic_symbol_p || bfd_link_pic (info)) 4289 && (input_section->flags & SEC_ALLOC) != 0) 4290 { 4291 BFD_ASSERT (srel != NULL); 4292 4293 /* If we don't need dynamic symbol lookup, install two 4294 RELATIVE relocations. */ 4295 if (!dynamic_symbol_p) 4296 { 4297 unsigned int dyn_r_type; 4298 4299 if (r_type == R_IA64_IPLTMSB) 4300 dyn_r_type = R_IA64_REL64MSB; 4301 else 4302 dyn_r_type = R_IA64_REL64LSB; 4303 4304 elfNN_ia64_install_dyn_reloc (output_bfd, info, 4305 input_section, 4306 srel, rel->r_offset, 4307 dyn_r_type, 0, value); 4308 elfNN_ia64_install_dyn_reloc (output_bfd, info, 4309 input_section, 4310 srel, rel->r_offset + 8, 4311 dyn_r_type, 0, gp_val); 4312 } 4313 else 4314 elfNN_ia64_install_dyn_reloc (output_bfd, info, input_section, 4315 srel, rel->r_offset, r_type, 4316 h->dynindx, rel->r_addend); 4317 } 4318 4319 if (r_type == R_IA64_IPLTMSB) 4320 r_type = R_IA64_DIR64MSB; 4321 else 4322 r_type = R_IA64_DIR64LSB; 4323 ia64_elf_install_value (hit_addr, value, r_type); 4324 r = ia64_elf_install_value (hit_addr + 8, gp_val, r_type); 4325 break; 4326 4327 case R_IA64_TPREL14: 4328 case R_IA64_TPREL22: 4329 case R_IA64_TPREL64I: 4330 if (elf_hash_table (info)->tls_sec == NULL) 4331 goto missing_tls_sec; 4332 value -= elfNN_ia64_tprel_base (info); 4333 r = ia64_elf_install_value (hit_addr, value, r_type); 4334 break; 4335 4336 case R_IA64_DTPREL14: 4337 case R_IA64_DTPREL22: 4338 case R_IA64_DTPREL64I: 4339 case R_IA64_DTPREL32LSB: 4340 case R_IA64_DTPREL32MSB: 4341 case R_IA64_DTPREL64LSB: 4342 case R_IA64_DTPREL64MSB: 4343 if (elf_hash_table (info)->tls_sec == NULL) 4344 goto missing_tls_sec; 4345 value -= elfNN_ia64_dtprel_base (info); 4346 r = ia64_elf_install_value (hit_addr, value, r_type); 4347 break; 4348 4349 case R_IA64_LTOFF_TPREL22: 4350 case R_IA64_LTOFF_DTPMOD22: 4351 case R_IA64_LTOFF_DTPREL22: 4352 { 4353 int got_r_type; 4354 long dynindx = h ? h->dynindx : -1; 4355 bfd_vma r_addend = rel->r_addend; 4356 4357 switch (r_type) 4358 { 4359 default: 4360 case R_IA64_LTOFF_TPREL22: 4361 if (!dynamic_symbol_p) 4362 { 4363 if (elf_hash_table (info)->tls_sec == NULL) 4364 goto missing_tls_sec; 4365 if (!bfd_link_pic (info)) 4366 value -= elfNN_ia64_tprel_base (info); 4367 else 4368 { 4369 r_addend += value - elfNN_ia64_dtprel_base (info); 4370 dynindx = 0; 4371 } 4372 } 4373 got_r_type = R_IA64_TPREL64LSB; 4374 break; 4375 case R_IA64_LTOFF_DTPMOD22: 4376 if (!dynamic_symbol_p && !bfd_link_pic (info)) 4377 value = 1; 4378 got_r_type = R_IA64_DTPMOD64LSB; 4379 break; 4380 case R_IA64_LTOFF_DTPREL22: 4381 if (!dynamic_symbol_p) 4382 { 4383 if (elf_hash_table (info)->tls_sec == NULL) 4384 goto missing_tls_sec; 4385 value -= elfNN_ia64_dtprel_base (info); 4386 } 4387 got_r_type = R_IA64_DTPRELNNLSB; 4388 break; 4389 } 4390 dyn_i = get_dyn_sym_info (ia64_info, h, input_bfd, rel, false); 4391 value = set_got_entry (input_bfd, info, dyn_i, dynindx, r_addend, 4392 value, got_r_type); 4393 value -= gp_val; 4394 r = ia64_elf_install_value (hit_addr, value, r_type); 4395 } 4396 break; 4397 4398 default: 4399 r = bfd_reloc_notsupported; 4400 break; 4401 } 4402 4403 switch (r) 4404 { 4405 case bfd_reloc_ok: 4406 break; 4407 4408 case bfd_reloc_undefined: 4409 /* This can happen for global table relative relocs if 4410 __gp is undefined. This is a panic situation so we 4411 don't try to continue. */ 4412 (*info->callbacks->undefined_symbol) 4413 (info, "__gp", input_bfd, input_section, rel->r_offset, 1); 4414 return false; 4415 4416 case bfd_reloc_notsupported: 4417 { 4418 const char *name; 4419 4420 if (h) 4421 name = h->root.root.string; 4422 else 4423 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, 4424 sym_sec); 4425 (*info->callbacks->warning) (info, _("unsupported reloc"), 4426 name, input_bfd, 4427 input_section, rel->r_offset); 4428 ret_val = false; 4429 } 4430 break; 4431 4432 case bfd_reloc_dangerous: 4433 case bfd_reloc_outofrange: 4434 case bfd_reloc_overflow: 4435 default: 4436 missing_tls_sec: 4437 { 4438 const char *name; 4439 4440 if (h) 4441 name = h->root.root.string; 4442 else 4443 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, 4444 sym_sec); 4445 4446 switch (r_type) 4447 { 4448 case R_IA64_TPREL14: 4449 case R_IA64_TPREL22: 4450 case R_IA64_TPREL64I: 4451 case R_IA64_DTPREL14: 4452 case R_IA64_DTPREL22: 4453 case R_IA64_DTPREL64I: 4454 case R_IA64_DTPREL32LSB: 4455 case R_IA64_DTPREL32MSB: 4456 case R_IA64_DTPREL64LSB: 4457 case R_IA64_DTPREL64MSB: 4458 case R_IA64_LTOFF_TPREL22: 4459 case R_IA64_LTOFF_DTPMOD22: 4460 case R_IA64_LTOFF_DTPREL22: 4461 _bfd_error_handler 4462 /* xgettext:c-format */ 4463 (_("%pB: missing TLS section for relocation %s against `%s'" 4464 " at %#" PRIx64 " in section `%pA'."), 4465 input_bfd, howto->name, name, 4466 (uint64_t) rel->r_offset, input_section); 4467 break; 4468 4469 case R_IA64_PCREL21B: 4470 case R_IA64_PCREL21BI: 4471 case R_IA64_PCREL21M: 4472 case R_IA64_PCREL21F: 4473 if (is_elf_hash_table (info->hash)) 4474 { 4475 /* Relaxtion is always performed for ELF output. 4476 Overflow failures for those relocations mean 4477 that the section is too big to relax. */ 4478 _bfd_error_handler 4479 /* xgettext:c-format */ 4480 (_("%pB: Can't relax br (%s) to `%s' at %#" PRIx64 4481 " in section `%pA' with size %#" PRIx64 4482 " (> 0x1000000)."), 4483 input_bfd, howto->name, name, (uint64_t) rel->r_offset, 4484 input_section, (uint64_t) input_section->size); 4485 break; 4486 } 4487 /* Fall through. */ 4488 default: 4489 (*info->callbacks->reloc_overflow) (info, 4490 &h->root, 4491 name, 4492 howto->name, 4493 (bfd_vma) 0, 4494 input_bfd, 4495 input_section, 4496 rel->r_offset); 4497 break; 4498 } 4499 4500 ret_val = false; 4501 } 4502 break; 4503 } 4504 } 4505 4506 return ret_val; 4507} 4508 4509static bool 4510elfNN_ia64_finish_dynamic_symbol (bfd *output_bfd, 4511 struct bfd_link_info *info, 4512 struct elf_link_hash_entry *h, 4513 Elf_Internal_Sym *sym) 4514{ 4515 struct elfNN_ia64_link_hash_table *ia64_info; 4516 struct elfNN_ia64_dyn_sym_info *dyn_i; 4517 4518 ia64_info = elfNN_ia64_hash_table (info); 4519 if (ia64_info == NULL) 4520 return false; 4521 4522 dyn_i = get_dyn_sym_info (ia64_info, h, NULL, NULL, false); 4523 4524 /* Fill in the PLT data, if required. */ 4525 if (dyn_i && dyn_i->want_plt) 4526 { 4527 Elf_Internal_Rela outrel; 4528 bfd_byte *loc; 4529 asection *plt_sec; 4530 bfd_vma plt_addr, pltoff_addr, gp_val, plt_index; 4531 4532 gp_val = _bfd_get_gp_value (output_bfd); 4533 4534 /* Initialize the minimal PLT entry. */ 4535 4536 plt_index = (dyn_i->plt_offset - PLT_HEADER_SIZE) / PLT_MIN_ENTRY_SIZE; 4537 plt_sec = ia64_info->root.splt; 4538 loc = plt_sec->contents + dyn_i->plt_offset; 4539 4540 memcpy (loc, plt_min_entry, PLT_MIN_ENTRY_SIZE); 4541 ia64_elf_install_value (loc, plt_index, R_IA64_IMM22); 4542 ia64_elf_install_value (loc+2, -dyn_i->plt_offset, R_IA64_PCREL21B); 4543 4544 plt_addr = (plt_sec->output_section->vma 4545 + plt_sec->output_offset 4546 + dyn_i->plt_offset); 4547 pltoff_addr = set_pltoff_entry (output_bfd, info, dyn_i, plt_addr, true); 4548 4549 /* Initialize the FULL PLT entry, if needed. */ 4550 if (dyn_i->want_plt2) 4551 { 4552 loc = plt_sec->contents + dyn_i->plt2_offset; 4553 4554 memcpy (loc, plt_full_entry, PLT_FULL_ENTRY_SIZE); 4555 ia64_elf_install_value (loc, pltoff_addr - gp_val, R_IA64_IMM22); 4556 4557 /* Mark the symbol as undefined, rather than as defined in the 4558 plt section. Leave the value alone. */ 4559 /* ??? We didn't redefine it in adjust_dynamic_symbol in the 4560 first place. But perhaps elflink.c did some for us. */ 4561 if (!h->def_regular) 4562 sym->st_shndx = SHN_UNDEF; 4563 } 4564 4565 /* Create the dynamic relocation. */ 4566 outrel.r_offset = pltoff_addr; 4567 if (bfd_little_endian (output_bfd)) 4568 outrel.r_info = ELFNN_R_INFO (h->dynindx, R_IA64_IPLTLSB); 4569 else 4570 outrel.r_info = ELFNN_R_INFO (h->dynindx, R_IA64_IPLTMSB); 4571 outrel.r_addend = 0; 4572 4573 /* This is fun. In the .IA_64.pltoff section, we've got entries 4574 that correspond both to real PLT entries, and those that 4575 happened to resolve to local symbols but need to be created 4576 to satisfy @pltoff relocations. The .rela.IA_64.pltoff 4577 relocations for the real PLT should come at the end of the 4578 section, so that they can be indexed by plt entry at runtime. 4579 4580 We emitted all of the relocations for the non-PLT @pltoff 4581 entries during relocate_section. So we can consider the 4582 existing sec->reloc_count to be the base of the array of 4583 PLT relocations. */ 4584 4585 loc = ia64_info->rel_pltoff_sec->contents; 4586 loc += ((ia64_info->rel_pltoff_sec->reloc_count + plt_index) 4587 * sizeof (ElfNN_External_Rela)); 4588 bfd_elfNN_swap_reloca_out (output_bfd, &outrel, loc); 4589 } 4590 4591 /* Mark some specially defined symbols as absolute. */ 4592 if (h == ia64_info->root.hdynamic 4593 || h == ia64_info->root.hgot 4594 || h == ia64_info->root.hplt) 4595 sym->st_shndx = SHN_ABS; 4596 4597 return true; 4598} 4599 4600static bool 4601elfNN_ia64_finish_dynamic_sections (bfd *abfd, 4602 struct bfd_link_info *info) 4603{ 4604 struct elfNN_ia64_link_hash_table *ia64_info; 4605 bfd *dynobj; 4606 4607 ia64_info = elfNN_ia64_hash_table (info); 4608 if (ia64_info == NULL) 4609 return false; 4610 4611 dynobj = ia64_info->root.dynobj; 4612 4613 if (ia64_info->root.dynamic_sections_created) 4614 { 4615 ElfNN_External_Dyn *dyncon, *dynconend; 4616 asection *sdyn, *sgotplt; 4617 bfd_vma gp_val; 4618 4619 sdyn = bfd_get_linker_section (dynobj, ".dynamic"); 4620 sgotplt = ia64_info->root.sgotplt; 4621 BFD_ASSERT (sdyn != NULL); 4622 dyncon = (ElfNN_External_Dyn *) sdyn->contents; 4623 dynconend = (ElfNN_External_Dyn *) (sdyn->contents + sdyn->size); 4624 4625 gp_val = _bfd_get_gp_value (abfd); 4626 4627 for (; dyncon < dynconend; dyncon++) 4628 { 4629 Elf_Internal_Dyn dyn; 4630 4631 bfd_elfNN_swap_dyn_in (dynobj, dyncon, &dyn); 4632 4633 switch (dyn.d_tag) 4634 { 4635 case DT_PLTGOT: 4636 dyn.d_un.d_ptr = gp_val; 4637 break; 4638 4639 case DT_PLTRELSZ: 4640 dyn.d_un.d_val = (ia64_info->minplt_entries 4641 * sizeof (ElfNN_External_Rela)); 4642 break; 4643 4644 case DT_JMPREL: 4645 /* See the comment above in finish_dynamic_symbol. */ 4646 dyn.d_un.d_ptr = (ia64_info->rel_pltoff_sec->output_section->vma 4647 + ia64_info->rel_pltoff_sec->output_offset 4648 + (ia64_info->rel_pltoff_sec->reloc_count 4649 * sizeof (ElfNN_External_Rela))); 4650 break; 4651 4652 case DT_IA_64_PLT_RESERVE: 4653 dyn.d_un.d_ptr = (sgotplt->output_section->vma 4654 + sgotplt->output_offset); 4655 break; 4656 } 4657 4658 bfd_elfNN_swap_dyn_out (abfd, &dyn, dyncon); 4659 } 4660 4661 /* Initialize the PLT0 entry. */ 4662 if (ia64_info->root.splt) 4663 { 4664 bfd_byte *loc = ia64_info->root.splt->contents; 4665 bfd_vma pltres; 4666 4667 memcpy (loc, plt_header, PLT_HEADER_SIZE); 4668 4669 pltres = (sgotplt->output_section->vma 4670 + sgotplt->output_offset 4671 - gp_val); 4672 4673 ia64_elf_install_value (loc+1, pltres, R_IA64_GPREL22); 4674 } 4675 } 4676 4677 return true; 4678} 4679 4680/* ELF file flag handling: */ 4681 4682/* Function to keep IA-64 specific file flags. */ 4683static bool 4684elfNN_ia64_set_private_flags (bfd *abfd, flagword flags) 4685{ 4686 BFD_ASSERT (!elf_flags_init (abfd) 4687 || elf_elfheader (abfd)->e_flags == flags); 4688 4689 elf_elfheader (abfd)->e_flags = flags; 4690 elf_flags_init (abfd) = true; 4691 return true; 4692} 4693 4694/* Merge backend specific data from an object file to the output 4695 object file when linking. */ 4696 4697static bool 4698elfNN_ia64_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) 4699{ 4700 bfd *obfd = info->output_bfd; 4701 flagword out_flags; 4702 flagword in_flags; 4703 bool ok = true; 4704 4705 /* FIXME: What should be checked when linking shared libraries? */ 4706 if ((ibfd->flags & DYNAMIC) != 0) 4707 return true; 4708 4709 if (!is_ia64_elf (ibfd) || !is_ia64_elf (obfd)) 4710 return true; 4711 4712 in_flags = elf_elfheader (ibfd)->e_flags; 4713 out_flags = elf_elfheader (obfd)->e_flags; 4714 4715 if (! elf_flags_init (obfd)) 4716 { 4717 elf_flags_init (obfd) = true; 4718 elf_elfheader (obfd)->e_flags = in_flags; 4719 4720 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) 4721 && bfd_get_arch_info (obfd)->the_default) 4722 { 4723 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), 4724 bfd_get_mach (ibfd)); 4725 } 4726 4727 return true; 4728 } 4729 4730 /* Check flag compatibility. */ 4731 if (in_flags == out_flags) 4732 return true; 4733 4734 /* Output has EF_IA_64_REDUCEDFP set only if all inputs have it set. */ 4735 if (!(in_flags & EF_IA_64_REDUCEDFP) && (out_flags & EF_IA_64_REDUCEDFP)) 4736 elf_elfheader (obfd)->e_flags &= ~EF_IA_64_REDUCEDFP; 4737 4738 if ((in_flags & EF_IA_64_TRAPNIL) != (out_flags & EF_IA_64_TRAPNIL)) 4739 { 4740 _bfd_error_handler 4741 (_("%pB: linking trap-on-NULL-dereference with non-trapping files"), 4742 ibfd); 4743 4744 bfd_set_error (bfd_error_bad_value); 4745 ok = false; 4746 } 4747 if ((in_flags & EF_IA_64_BE) != (out_flags & EF_IA_64_BE)) 4748 { 4749 _bfd_error_handler 4750 (_("%pB: linking big-endian files with little-endian files"), 4751 ibfd); 4752 4753 bfd_set_error (bfd_error_bad_value); 4754 ok = false; 4755 } 4756 if ((in_flags & EF_IA_64_ABI64) != (out_flags & EF_IA_64_ABI64)) 4757 { 4758 _bfd_error_handler 4759 (_("%pB: linking 64-bit files with 32-bit files"), 4760 ibfd); 4761 4762 bfd_set_error (bfd_error_bad_value); 4763 ok = false; 4764 } 4765 if ((in_flags & EF_IA_64_CONS_GP) != (out_flags & EF_IA_64_CONS_GP)) 4766 { 4767 _bfd_error_handler 4768 (_("%pB: linking constant-gp files with non-constant-gp files"), 4769 ibfd); 4770 4771 bfd_set_error (bfd_error_bad_value); 4772 ok = false; 4773 } 4774 if ((in_flags & EF_IA_64_NOFUNCDESC_CONS_GP) 4775 != (out_flags & EF_IA_64_NOFUNCDESC_CONS_GP)) 4776 { 4777 _bfd_error_handler 4778 (_("%pB: linking auto-pic files with non-auto-pic files"), 4779 ibfd); 4780 4781 bfd_set_error (bfd_error_bad_value); 4782 ok = false; 4783 } 4784 4785 return ok; 4786} 4787 4788static bool 4789elfNN_ia64_print_private_bfd_data (bfd *abfd, void * ptr) 4790{ 4791 FILE *file = (FILE *) ptr; 4792 flagword flags = elf_elfheader (abfd)->e_flags; 4793 4794 BFD_ASSERT (abfd != NULL && ptr != NULL); 4795 4796 fprintf (file, "private flags = %s%s%s%s%s%s%s%s\n", 4797 (flags & EF_IA_64_TRAPNIL) ? "TRAPNIL, " : "", 4798 (flags & EF_IA_64_EXT) ? "EXT, " : "", 4799 (flags & EF_IA_64_BE) ? "BE, " : "LE, ", 4800 (flags & EF_IA_64_REDUCEDFP) ? "REDUCEDFP, " : "", 4801 (flags & EF_IA_64_CONS_GP) ? "CONS_GP, " : "", 4802 (flags & EF_IA_64_NOFUNCDESC_CONS_GP) ? "NOFUNCDESC_CONS_GP, " : "", 4803 (flags & EF_IA_64_ABSOLUTE) ? "ABSOLUTE, " : "", 4804 (flags & EF_IA_64_ABI64) ? "ABI64" : "ABI32"); 4805 4806 _bfd_elf_print_private_bfd_data (abfd, ptr); 4807 return true; 4808} 4809 4810static enum elf_reloc_type_class 4811elfNN_ia64_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, 4812 const asection *rel_sec ATTRIBUTE_UNUSED, 4813 const Elf_Internal_Rela *rela) 4814{ 4815 switch ((int) ELFNN_R_TYPE (rela->r_info)) 4816 { 4817 case R_IA64_REL32MSB: 4818 case R_IA64_REL32LSB: 4819 case R_IA64_REL64MSB: 4820 case R_IA64_REL64LSB: 4821 return reloc_class_relative; 4822 case R_IA64_IPLTMSB: 4823 case R_IA64_IPLTLSB: 4824 return reloc_class_plt; 4825 case R_IA64_COPY: 4826 return reloc_class_copy; 4827 default: 4828 return reloc_class_normal; 4829 } 4830} 4831 4832static const struct bfd_elf_special_section elfNN_ia64_special_sections[] = 4833{ 4834 { STRING_COMMA_LEN (".sbss"), -1, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_IA_64_SHORT }, 4835 { STRING_COMMA_LEN (".sdata"), -1, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_IA_64_SHORT }, 4836 { NULL, 0, 0, 0, 0 } 4837}; 4838 4839static bool 4840elfNN_ia64_object_p (bfd *abfd) 4841{ 4842 asection *sec; 4843 asection *group, *unwi, *unw; 4844 flagword flags; 4845 const char *name; 4846 char *unwi_name, *unw_name; 4847 size_t amt; 4848 4849 if (abfd->flags & DYNAMIC) 4850 return true; 4851 4852 /* Flags for fake group section. */ 4853 flags = (SEC_LINKER_CREATED | SEC_GROUP | SEC_LINK_ONCE 4854 | SEC_EXCLUDE); 4855 4856 /* We add a fake section group for each .gnu.linkonce.t.* section, 4857 which isn't in a section group, and its unwind sections. */ 4858 for (sec = abfd->sections; sec != NULL; sec = sec->next) 4859 { 4860 if (elf_sec_group (sec) == NULL 4861 && ((sec->flags & (SEC_LINK_ONCE | SEC_CODE | SEC_GROUP)) 4862 == (SEC_LINK_ONCE | SEC_CODE)) 4863 && startswith (sec->name, ".gnu.linkonce.t.")) 4864 { 4865 name = sec->name + 16; 4866 4867 amt = strlen (name) + sizeof (".gnu.linkonce.ia64unwi."); 4868 unwi_name = bfd_alloc (abfd, amt); 4869 if (!unwi_name) 4870 return false; 4871 4872 strcpy (stpcpy (unwi_name, ".gnu.linkonce.ia64unwi."), name); 4873 unwi = bfd_get_section_by_name (abfd, unwi_name); 4874 4875 amt = strlen (name) + sizeof (".gnu.linkonce.ia64unw."); 4876 unw_name = bfd_alloc (abfd, amt); 4877 if (!unw_name) 4878 return false; 4879 4880 strcpy (stpcpy (unw_name, ".gnu.linkonce.ia64unw."), name); 4881 unw = bfd_get_section_by_name (abfd, unw_name); 4882 4883 /* We need to create a fake group section for it and its 4884 unwind sections. */ 4885 group = bfd_make_section_anyway_with_flags (abfd, name, 4886 flags); 4887 if (group == NULL) 4888 return false; 4889 4890 /* Move the fake group section to the beginning. */ 4891 bfd_section_list_remove (abfd, group); 4892 bfd_section_list_prepend (abfd, group); 4893 4894 elf_next_in_group (group) = sec; 4895 4896 elf_group_name (sec) = name; 4897 elf_next_in_group (sec) = sec; 4898 elf_sec_group (sec) = group; 4899 4900 if (unwi) 4901 { 4902 elf_group_name (unwi) = name; 4903 elf_next_in_group (unwi) = sec; 4904 elf_next_in_group (sec) = unwi; 4905 elf_sec_group (unwi) = group; 4906 } 4907 4908 if (unw) 4909 { 4910 elf_group_name (unw) = name; 4911 if (unwi) 4912 { 4913 elf_next_in_group (unw) = elf_next_in_group (unwi); 4914 elf_next_in_group (unwi) = unw; 4915 } 4916 else 4917 { 4918 elf_next_in_group (unw) = sec; 4919 elf_next_in_group (sec) = unw; 4920 } 4921 elf_sec_group (unw) = group; 4922 } 4923 4924 /* Fake SHT_GROUP section header. */ 4925 elf_section_data (group)->this_hdr.bfd_section = group; 4926 elf_section_data (group)->this_hdr.sh_type = SHT_GROUP; 4927 } 4928 } 4929 return true; 4930} 4931 4932static bool 4933elfNN_ia64_hpux_vec (const bfd_target *vec) 4934{ 4935 extern const bfd_target ia64_elfNN_hpux_be_vec; 4936 return (vec == &ia64_elfNN_hpux_be_vec); 4937} 4938 4939static bool 4940elfNN_hpux_init_file_header (bfd *abfd, struct bfd_link_info *info) 4941{ 4942 Elf_Internal_Ehdr *i_ehdrp; 4943 4944 if (!_bfd_elf_init_file_header (abfd, info)) 4945 return false; 4946 4947 i_ehdrp = elf_elfheader (abfd); 4948 i_ehdrp->e_ident[EI_OSABI] = get_elf_backend_data (abfd)->elf_osabi; 4949 i_ehdrp->e_ident[EI_ABIVERSION] = 1; 4950 return true; 4951} 4952 4953static bool 4954elfNN_hpux_backend_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED, 4955 asection *sec, int *retval) 4956{ 4957 if (bfd_is_com_section (sec)) 4958 { 4959 *retval = SHN_IA_64_ANSI_COMMON; 4960 return true; 4961 } 4962 return false; 4963} 4964 4965static void 4966elfNN_hpux_backend_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, 4967 asymbol *asym) 4968{ 4969 elf_symbol_type *elfsym = (elf_symbol_type *) asym; 4970 4971 switch (elfsym->internal_elf_sym.st_shndx) 4972 { 4973 case SHN_IA_64_ANSI_COMMON: 4974 asym->section = bfd_com_section_ptr; 4975 asym->value = elfsym->internal_elf_sym.st_size; 4976 asym->flags &= ~BSF_GLOBAL; 4977 break; 4978 } 4979} 4980 4981static void 4982ignore_errors (const char *fmt ATTRIBUTE_UNUSED, ...) 4983{ 4984} 4985 4986#define TARGET_LITTLE_SYM ia64_elfNN_le_vec 4987#define TARGET_LITTLE_NAME "elfNN-ia64-little" 4988#define TARGET_BIG_SYM ia64_elfNN_be_vec 4989#define TARGET_BIG_NAME "elfNN-ia64-big" 4990#define ELF_ARCH bfd_arch_ia64 4991#define ELF_TARGET_ID IA64_ELF_DATA 4992#define ELF_MACHINE_CODE EM_IA_64 4993#define ELF_MACHINE_ALT1 1999 /* EAS2.3 */ 4994#define ELF_MACHINE_ALT2 1998 /* EAS2.2 */ 4995#define ELF_MAXPAGESIZE 0x10000 /* 64KB */ 4996#define ELF_COMMONPAGESIZE 0x4000 /* 16KB */ 4997 4998#define elf_backend_section_from_shdr \ 4999 elfNN_ia64_section_from_shdr 5000#define elf_backend_section_flags \ 5001 elfNN_ia64_section_flags 5002#define elf_backend_fake_sections \ 5003 elfNN_ia64_fake_sections 5004#define elf_backend_final_write_processing \ 5005 elfNN_ia64_final_write_processing 5006#define elf_backend_add_symbol_hook \ 5007 elfNN_ia64_add_symbol_hook 5008#define elf_backend_additional_program_headers \ 5009 elfNN_ia64_additional_program_headers 5010#define elf_backend_modify_segment_map \ 5011 elfNN_ia64_modify_segment_map 5012#define elf_backend_modify_headers \ 5013 elfNN_ia64_modify_headers 5014#define elf_info_to_howto \ 5015 elfNN_ia64_info_to_howto 5016 5017#define bfd_elfNN_bfd_reloc_type_lookup \ 5018 ia64_elf_reloc_type_lookup 5019#define bfd_elfNN_bfd_reloc_name_lookup \ 5020 ia64_elf_reloc_name_lookup 5021#define bfd_elfNN_bfd_is_local_label_name \ 5022 elfNN_ia64_is_local_label_name 5023#define bfd_elfNN_bfd_relax_section \ 5024 elfNN_ia64_relax_section 5025 5026#define elf_backend_object_p \ 5027 elfNN_ia64_object_p 5028 5029/* Stuff for the BFD linker: */ 5030#define bfd_elfNN_bfd_link_hash_table_create \ 5031 elfNN_ia64_hash_table_create 5032#define elf_backend_create_dynamic_sections \ 5033 elfNN_ia64_create_dynamic_sections 5034#define elf_backend_check_relocs \ 5035 elfNN_ia64_check_relocs 5036#define elf_backend_adjust_dynamic_symbol \ 5037 elfNN_ia64_adjust_dynamic_symbol 5038#define elf_backend_size_dynamic_sections \ 5039 elfNN_ia64_size_dynamic_sections 5040#define elf_backend_omit_section_dynsym \ 5041 _bfd_elf_omit_section_dynsym_all 5042#define elf_backend_relocate_section \ 5043 elfNN_ia64_relocate_section 5044#define elf_backend_finish_dynamic_symbol \ 5045 elfNN_ia64_finish_dynamic_symbol 5046#define elf_backend_finish_dynamic_sections \ 5047 elfNN_ia64_finish_dynamic_sections 5048#define bfd_elfNN_bfd_final_link \ 5049 elfNN_ia64_final_link 5050 5051#define bfd_elfNN_bfd_merge_private_bfd_data \ 5052 elfNN_ia64_merge_private_bfd_data 5053#define bfd_elfNN_bfd_set_private_flags \ 5054 elfNN_ia64_set_private_flags 5055#define bfd_elfNN_bfd_print_private_bfd_data \ 5056 elfNN_ia64_print_private_bfd_data 5057 5058#define elf_backend_plt_readonly 1 5059#define elf_backend_can_gc_sections 1 5060#define elf_backend_want_plt_sym 0 5061#define elf_backend_plt_alignment 5 5062#define elf_backend_got_header_size 0 5063#define elf_backend_want_got_plt 1 5064#define elf_backend_may_use_rel_p 1 5065#define elf_backend_may_use_rela_p 1 5066#define elf_backend_default_use_rela_p 1 5067#define elf_backend_want_dynbss 0 5068#define elf_backend_copy_indirect_symbol elfNN_ia64_hash_copy_indirect 5069#define elf_backend_hide_symbol elfNN_ia64_hash_hide_symbol 5070#define elf_backend_fixup_symbol _bfd_elf_link_hash_fixup_symbol 5071#define elf_backend_reloc_type_class elfNN_ia64_reloc_type_class 5072#define elf_backend_rela_normal 1 5073#define elf_backend_dtrel_excludes_plt 1 5074#define elf_backend_special_sections elfNN_ia64_special_sections 5075#define elf_backend_default_execstack 0 5076 5077/* FIXME: PR 290: The Intel C compiler generates SHT_IA_64_UNWIND with 5078 SHF_LINK_ORDER. But it doesn't set the sh_link or sh_info fields. 5079 We don't want to flood users with so many error messages. We turn 5080 off the warning for now. It will be turned on later when the Intel 5081 compiler is fixed. */ 5082#define elf_backend_link_order_error_handler ignore_errors 5083 5084#include "elfNN-target.h" 5085 5086/* HPUX-specific vectors. */ 5087 5088#undef TARGET_LITTLE_SYM 5089#undef TARGET_LITTLE_NAME 5090#undef TARGET_BIG_SYM 5091#define TARGET_BIG_SYM ia64_elfNN_hpux_be_vec 5092#undef TARGET_BIG_NAME 5093#define TARGET_BIG_NAME "elfNN-ia64-hpux-big" 5094 5095/* These are HP-UX specific functions. */ 5096 5097#undef elf_backend_init_file_header 5098#define elf_backend_init_file_header elfNN_hpux_init_file_header 5099 5100#undef elf_backend_section_from_bfd_section 5101#define elf_backend_section_from_bfd_section elfNN_hpux_backend_section_from_bfd_section 5102 5103#undef elf_backend_symbol_processing 5104#define elf_backend_symbol_processing elfNN_hpux_backend_symbol_processing 5105 5106#undef elf_backend_want_p_paddr_set_to_zero 5107#define elf_backend_want_p_paddr_set_to_zero 1 5108 5109#undef ELF_COMMONPAGESIZE 5110#undef ELF_OSABI 5111#define ELF_OSABI ELFOSABI_HPUX 5112 5113#undef elfNN_bed 5114#define elfNN_bed elfNN_ia64_hpux_bed 5115 5116#include "elfNN-target.h" 5117