elfnn-ia64.c revision 1.3
1/* IA-64 support for 64-bit ELF 2 Copyright (C) 1998-2015 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 "bfd_stdint.h" 31#include "elfxx-ia64.h" 32 33#define ARCH_SIZE NN 34 35#if ARCH_SIZE == 64 36#define LOG_SECTION_ALIGN 3 37#endif 38 39#if ARCH_SIZE == 32 40#define LOG_SECTION_ALIGN 2 41#endif 42 43typedef struct bfd_hash_entry *(*new_hash_entry_func) 44 (struct bfd_hash_entry *, struct bfd_hash_table *, const char *); 45 46/* In dynamically (linker-) created sections, we generally need to keep track 47 of the place a symbol or expression got allocated to. This is done via hash 48 tables that store entries of the following type. */ 49 50struct elfNN_ia64_dyn_sym_info 51{ 52 /* The addend for which this entry is relevant. */ 53 bfd_vma addend; 54 55 bfd_vma got_offset; 56 bfd_vma fptr_offset; 57 bfd_vma pltoff_offset; 58 bfd_vma plt_offset; 59 bfd_vma plt2_offset; 60 bfd_vma tprel_offset; 61 bfd_vma dtpmod_offset; 62 bfd_vma dtprel_offset; 63 64 /* The symbol table entry, if any, that this was derived from. */ 65 struct elf_link_hash_entry *h; 66 67 /* Used to count non-got, non-plt relocations for delayed sizing 68 of relocation sections. */ 69 struct elfNN_ia64_dyn_reloc_entry 70 { 71 struct elfNN_ia64_dyn_reloc_entry *next; 72 asection *srel; 73 int type; 74 int count; 75 76 /* Is this reloc against readonly section? */ 77 bfd_boolean reltext; 78 } *reloc_entries; 79 80 /* TRUE when the section contents have been updated. */ 81 unsigned got_done : 1; 82 unsigned fptr_done : 1; 83 unsigned pltoff_done : 1; 84 unsigned tprel_done : 1; 85 unsigned dtpmod_done : 1; 86 unsigned dtprel_done : 1; 87 88 /* TRUE for the different kinds of linker data we want created. */ 89 unsigned want_got : 1; 90 unsigned want_gotx : 1; 91 unsigned want_fptr : 1; 92 unsigned want_ltoff_fptr : 1; 93 unsigned want_plt : 1; 94 unsigned want_plt2 : 1; 95 unsigned want_pltoff : 1; 96 unsigned want_tprel : 1; 97 unsigned want_dtpmod : 1; 98 unsigned want_dtprel : 1; 99}; 100 101struct elfNN_ia64_local_hash_entry 102{ 103 int id; 104 unsigned int r_sym; 105 /* The number of elements in elfNN_ia64_dyn_sym_info array. */ 106 unsigned int count; 107 /* The number of sorted elements in elfNN_ia64_dyn_sym_info array. */ 108 unsigned int sorted_count; 109 /* The size of elfNN_ia64_dyn_sym_info array. */ 110 unsigned int size; 111 /* The array of elfNN_ia64_dyn_sym_info. */ 112 struct elfNN_ia64_dyn_sym_info *info; 113 114 /* TRUE if this hash entry's addends was translated for 115 SHF_MERGE optimization. */ 116 unsigned sec_merge_done : 1; 117}; 118 119struct elfNN_ia64_link_hash_entry 120{ 121 struct elf_link_hash_entry root; 122 /* The number of elements in elfNN_ia64_dyn_sym_info array. */ 123 unsigned int count; 124 /* The number of sorted elements in elfNN_ia64_dyn_sym_info array. */ 125 unsigned int sorted_count; 126 /* The size of elfNN_ia64_dyn_sym_info array. */ 127 unsigned int size; 128 /* The array of elfNN_ia64_dyn_sym_info. */ 129 struct elfNN_ia64_dyn_sym_info *info; 130}; 131 132struct elfNN_ia64_link_hash_table 133{ 134 /* The main hash table. */ 135 struct elf_link_hash_table root; 136 137 asection *fptr_sec; /* Function descriptor table (or NULL). */ 138 asection *rel_fptr_sec; /* Dynamic relocation section for same. */ 139 asection *pltoff_sec; /* Private descriptors for plt (or NULL). */ 140 asection *rel_pltoff_sec; /* Dynamic relocation section for same. */ 141 142 bfd_size_type minplt_entries; /* Number of minplt entries. */ 143 unsigned reltext : 1; /* Are there relocs against readonly sections? */ 144 unsigned self_dtpmod_done : 1;/* Has self DTPMOD entry been finished? */ 145 bfd_vma self_dtpmod_offset; /* .got offset to self DTPMOD entry. */ 146 /* There are maybe R_IA64_GPREL22 relocations, including those 147 optimized from R_IA64_LTOFF22X, against non-SHF_IA_64_SHORT 148 sections. We need to record those sections so that we can choose 149 a proper GP to cover all R_IA64_GPREL22 relocations. */ 150 asection *max_short_sec; /* Maximum short output section. */ 151 bfd_vma max_short_offset; /* Maximum short offset. */ 152 asection *min_short_sec; /* Minimum short output section. */ 153 bfd_vma min_short_offset; /* Minimum short offset. */ 154 155 htab_t loc_hash_table; 156 void *loc_hash_memory; 157}; 158 159struct elfNN_ia64_allocate_data 160{ 161 struct bfd_link_info *info; 162 bfd_size_type ofs; 163 bfd_boolean only_got; 164}; 165 166#define elfNN_ia64_hash_table(p) \ 167 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ 168 == IA64_ELF_DATA ? ((struct elfNN_ia64_link_hash_table *) ((p)->hash)) : NULL) 169 170static struct elfNN_ia64_dyn_sym_info * get_dyn_sym_info 171 (struct elfNN_ia64_link_hash_table *ia64_info, 172 struct elf_link_hash_entry *h, 173 bfd *abfd, const Elf_Internal_Rela *rel, bfd_boolean create); 174static bfd_boolean elfNN_ia64_dynamic_symbol_p 175 (struct elf_link_hash_entry *h, struct bfd_link_info *info, int); 176static bfd_boolean elfNN_ia64_choose_gp 177 (bfd *abfd, struct bfd_link_info *info, bfd_boolean final); 178static void elfNN_ia64_dyn_sym_traverse 179 (struct elfNN_ia64_link_hash_table *ia64_info, 180 bfd_boolean (*func) (struct elfNN_ia64_dyn_sym_info *, void *), 181 void * info); 182static bfd_boolean allocate_global_data_got 183 (struct elfNN_ia64_dyn_sym_info *dyn_i, void * data); 184static bfd_boolean allocate_global_fptr_got 185 (struct elfNN_ia64_dyn_sym_info *dyn_i, void * data); 186static bfd_boolean allocate_local_got 187 (struct elfNN_ia64_dyn_sym_info *dyn_i, void * data); 188static bfd_boolean elfNN_ia64_hpux_vec 189 (const bfd_target *vec); 190static bfd_boolean allocate_dynrel_entries 191 (struct elfNN_ia64_dyn_sym_info *dyn_i, void * data); 192static asection *get_pltoff 193 (bfd *abfd, struct bfd_link_info *info, 194 struct elfNN_ia64_link_hash_table *ia64_info); 195 196/* ia64-specific relocation. */ 197 198/* Given a ELF reloc, return the matching HOWTO structure. */ 199 200static void 201elfNN_ia64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, 202 arelent *bfd_reloc, 203 Elf_Internal_Rela *elf_reloc) 204{ 205 bfd_reloc->howto 206 = ia64_elf_lookup_howto ((unsigned int) ELFNN_R_TYPE (elf_reloc->r_info)); 207} 208 209#define PLT_HEADER_SIZE (3 * 16) 210#define PLT_MIN_ENTRY_SIZE (1 * 16) 211#define PLT_FULL_ENTRY_SIZE (2 * 16) 212#define PLT_RESERVED_WORDS 3 213 214static const bfd_byte plt_header[PLT_HEADER_SIZE] = 215{ 216 0x0b, 0x10, 0x00, 0x1c, 0x00, 0x21, /* [MMI] mov r2=r14;; */ 217 0xe0, 0x00, 0x08, 0x00, 0x48, 0x00, /* addl r14=0,r2 */ 218 0x00, 0x00, 0x04, 0x00, /* nop.i 0x0;; */ 219 0x0b, 0x80, 0x20, 0x1c, 0x18, 0x14, /* [MMI] ld8 r16=[r14],8;; */ 220 0x10, 0x41, 0x38, 0x30, 0x28, 0x00, /* ld8 r17=[r14],8 */ 221 0x00, 0x00, 0x04, 0x00, /* nop.i 0x0;; */ 222 0x11, 0x08, 0x00, 0x1c, 0x18, 0x10, /* [MIB] ld8 r1=[r14] */ 223 0x60, 0x88, 0x04, 0x80, 0x03, 0x00, /* mov b6=r17 */ 224 0x60, 0x00, 0x80, 0x00 /* br.few b6;; */ 225}; 226 227static const bfd_byte plt_min_entry[PLT_MIN_ENTRY_SIZE] = 228{ 229 0x11, 0x78, 0x00, 0x00, 0x00, 0x24, /* [MIB] mov r15=0 */ 230 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, /* nop.i 0x0 */ 231 0x00, 0x00, 0x00, 0x40 /* br.few 0 <PLT0>;; */ 232}; 233 234static const bfd_byte plt_full_entry[PLT_FULL_ENTRY_SIZE] = 235{ 236 0x0b, 0x78, 0x00, 0x02, 0x00, 0x24, /* [MMI] addl r15=0,r1;; */ 237 0x00, 0x41, 0x3c, 0x70, 0x29, 0xc0, /* ld8.acq r16=[r15],8*/ 238 0x01, 0x08, 0x00, 0x84, /* mov r14=r1;; */ 239 0x11, 0x08, 0x00, 0x1e, 0x18, 0x10, /* [MIB] ld8 r1=[r15] */ 240 0x60, 0x80, 0x04, 0x80, 0x03, 0x00, /* mov b6=r16 */ 241 0x60, 0x00, 0x80, 0x00 /* br.few b6;; */ 242}; 243 244#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" 245 246static const bfd_byte oor_brl[16] = 247{ 248 0x05, 0x00, 0x00, 0x00, 0x01, 0x00, /* [MLX] nop.m 0 */ 249 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* brl.sptk.few tgt;; */ 250 0x00, 0x00, 0x00, 0xc0 251}; 252 253static const bfd_byte oor_ip[48] = 254{ 255 0x04, 0x00, 0x00, 0x00, 0x01, 0x00, /* [MLX] nop.m 0 */ 256 0x00, 0x00, 0x00, 0x00, 0x00, 0xe0, /* movl r15=0 */ 257 0x01, 0x00, 0x00, 0x60, 258 0x03, 0x00, 0x00, 0x00, 0x01, 0x00, /* [MII] nop.m 0 */ 259 0x00, 0x01, 0x00, 0x60, 0x00, 0x00, /* mov r16=ip;; */ 260 0xf2, 0x80, 0x00, 0x80, /* add r16=r15,r16;; */ 261 0x11, 0x00, 0x00, 0x00, 0x01, 0x00, /* [MIB] nop.m 0 */ 262 0x60, 0x80, 0x04, 0x80, 0x03, 0x00, /* mov b6=r16 */ 263 0x60, 0x00, 0x80, 0x00 /* br b6;; */ 264}; 265 266static size_t oor_branch_size = sizeof (oor_brl); 267 268void 269bfd_elfNN_ia64_after_parse (int itanium) 270{ 271 oor_branch_size = itanium ? sizeof (oor_ip) : sizeof (oor_brl); 272} 273 274 275/* Rename some of the generic section flags to better document how they 276 are used here. */ 277#define skip_relax_pass_0 sec_flg0 278#define skip_relax_pass_1 sec_flg1 279 280/* These functions do relaxation for IA-64 ELF. */ 281 282static void 283elfNN_ia64_update_short_info (asection *sec, bfd_vma offset, 284 struct elfNN_ia64_link_hash_table *ia64_info) 285{ 286 /* Skip ABS and SHF_IA_64_SHORT sections. */ 287 if (sec == bfd_abs_section_ptr 288 || (sec->flags & SEC_SMALL_DATA) != 0) 289 return; 290 291 if (!ia64_info->min_short_sec) 292 { 293 ia64_info->max_short_sec = sec; 294 ia64_info->max_short_offset = offset; 295 ia64_info->min_short_sec = sec; 296 ia64_info->min_short_offset = offset; 297 } 298 else if (sec == ia64_info->max_short_sec 299 && offset > ia64_info->max_short_offset) 300 ia64_info->max_short_offset = offset; 301 else if (sec == ia64_info->min_short_sec 302 && offset < ia64_info->min_short_offset) 303 ia64_info->min_short_offset = offset; 304 else if (sec->output_section->vma 305 > ia64_info->max_short_sec->vma) 306 { 307 ia64_info->max_short_sec = sec; 308 ia64_info->max_short_offset = offset; 309 } 310 else if (sec->output_section->vma 311 < ia64_info->min_short_sec->vma) 312 { 313 ia64_info->min_short_sec = sec; 314 ia64_info->min_short_offset = offset; 315 } 316} 317 318static bfd_boolean 319elfNN_ia64_relax_section (bfd *abfd, asection *sec, 320 struct bfd_link_info *link_info, 321 bfd_boolean *again) 322{ 323 struct one_fixup 324 { 325 struct one_fixup *next; 326 asection *tsec; 327 bfd_vma toff; 328 bfd_vma trampoff; 329 }; 330 331 Elf_Internal_Shdr *symtab_hdr; 332 Elf_Internal_Rela *internal_relocs; 333 Elf_Internal_Rela *irel, *irelend; 334 bfd_byte *contents; 335 Elf_Internal_Sym *isymbuf = NULL; 336 struct elfNN_ia64_link_hash_table *ia64_info; 337 struct one_fixup *fixups = NULL; 338 bfd_boolean changed_contents = FALSE; 339 bfd_boolean changed_relocs = FALSE; 340 bfd_boolean changed_got = FALSE; 341 bfd_boolean skip_relax_pass_0 = TRUE; 342 bfd_boolean skip_relax_pass_1 = TRUE; 343 bfd_vma gp = 0; 344 345 /* Assume we're not going to change any sizes, and we'll only need 346 one pass. */ 347 *again = FALSE; 348 349 if (bfd_link_relocatable (link_info)) 350 (*link_info->callbacks->einfo) 351 (_("%P%F: --relax and -r may not be used together\n")); 352 353 /* Don't even try to relax for non-ELF outputs. */ 354 if (!is_elf_hash_table (link_info->hash)) 355 return FALSE; 356 357 /* Nothing to do if there are no relocations or there is no need for 358 the current pass. */ 359 if ((sec->flags & SEC_RELOC) == 0 360 || sec->reloc_count == 0 361 || (link_info->relax_pass == 0 && sec->skip_relax_pass_0) 362 || (link_info->relax_pass == 1 && sec->skip_relax_pass_1)) 363 return TRUE; 364 365 ia64_info = elfNN_ia64_hash_table (link_info); 366 if (ia64_info == NULL) 367 return FALSE; 368 369 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 370 371 /* Load the relocations for this section. */ 372 internal_relocs = (_bfd_elf_link_read_relocs 373 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL, 374 link_info->keep_memory)); 375 if (internal_relocs == NULL) 376 return FALSE; 377 378 irelend = internal_relocs + sec->reloc_count; 379 380 /* Get the section contents. */ 381 if (elf_section_data (sec)->this_hdr.contents != NULL) 382 contents = elf_section_data (sec)->this_hdr.contents; 383 else 384 { 385 if (!bfd_malloc_and_get_section (abfd, sec, &contents)) 386 goto error_return; 387 } 388 389 for (irel = internal_relocs; irel < irelend; irel++) 390 { 391 unsigned long r_type = ELFNN_R_TYPE (irel->r_info); 392 bfd_vma symaddr, reladdr, trampoff, toff, roff; 393 asection *tsec; 394 struct one_fixup *f; 395 bfd_size_type amt; 396 bfd_boolean is_branch; 397 struct elfNN_ia64_dyn_sym_info *dyn_i; 398 char symtype; 399 400 switch (r_type) 401 { 402 case R_IA64_PCREL21B: 403 case R_IA64_PCREL21BI: 404 case R_IA64_PCREL21M: 405 case R_IA64_PCREL21F: 406 /* In pass 1, all br relaxations are done. We can skip it. */ 407 if (link_info->relax_pass == 1) 408 continue; 409 skip_relax_pass_0 = FALSE; 410 is_branch = TRUE; 411 break; 412 413 case R_IA64_PCREL60B: 414 /* We can't optimize brl to br in pass 0 since br relaxations 415 will increase the code size. Defer it to pass 1. */ 416 if (link_info->relax_pass == 0) 417 { 418 skip_relax_pass_1 = FALSE; 419 continue; 420 } 421 is_branch = TRUE; 422 break; 423 424 case R_IA64_GPREL22: 425 /* Update max_short_sec/min_short_sec. */ 426 427 case R_IA64_LTOFF22X: 428 case R_IA64_LDXMOV: 429 /* We can't relax ldx/mov in pass 0 since br relaxations will 430 increase the code size. Defer it to pass 1. */ 431 if (link_info->relax_pass == 0) 432 { 433 skip_relax_pass_1 = FALSE; 434 continue; 435 } 436 is_branch = FALSE; 437 break; 438 439 default: 440 continue; 441 } 442 443 /* Get the value of the symbol referred to by the reloc. */ 444 if (ELFNN_R_SYM (irel->r_info) < symtab_hdr->sh_info) 445 { 446 /* A local symbol. */ 447 Elf_Internal_Sym *isym; 448 449 /* Read this BFD's local symbols. */ 450 if (isymbuf == NULL) 451 { 452 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; 453 if (isymbuf == NULL) 454 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, 455 symtab_hdr->sh_info, 0, 456 NULL, NULL, NULL); 457 if (isymbuf == 0) 458 goto error_return; 459 } 460 461 isym = isymbuf + ELFNN_R_SYM (irel->r_info); 462 if (isym->st_shndx == SHN_UNDEF) 463 continue; /* We can't do anything with undefined symbols. */ 464 else if (isym->st_shndx == SHN_ABS) 465 tsec = bfd_abs_section_ptr; 466 else if (isym->st_shndx == SHN_COMMON) 467 tsec = bfd_com_section_ptr; 468 else if (isym->st_shndx == SHN_IA_64_ANSI_COMMON) 469 tsec = bfd_com_section_ptr; 470 else 471 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx); 472 473 toff = isym->st_value; 474 dyn_i = get_dyn_sym_info (ia64_info, NULL, abfd, irel, FALSE); 475 symtype = ELF_ST_TYPE (isym->st_info); 476 } 477 else 478 { 479 unsigned long indx; 480 struct elf_link_hash_entry *h; 481 482 indx = ELFNN_R_SYM (irel->r_info) - symtab_hdr->sh_info; 483 h = elf_sym_hashes (abfd)[indx]; 484 BFD_ASSERT (h != NULL); 485 486 while (h->root.type == bfd_link_hash_indirect 487 || h->root.type == bfd_link_hash_warning) 488 h = (struct elf_link_hash_entry *) h->root.u.i.link; 489 490 dyn_i = get_dyn_sym_info (ia64_info, h, abfd, irel, FALSE); 491 492 /* For branches to dynamic symbols, we're interested instead 493 in a branch to the PLT entry. */ 494 if (is_branch && dyn_i && dyn_i->want_plt2) 495 { 496 /* Internal branches shouldn't be sent to the PLT. 497 Leave this for now and we'll give an error later. */ 498 if (r_type != R_IA64_PCREL21B) 499 continue; 500 501 tsec = ia64_info->root.splt; 502 toff = dyn_i->plt2_offset; 503 BFD_ASSERT (irel->r_addend == 0); 504 } 505 506 /* Can't do anything else with dynamic symbols. */ 507 else if (elfNN_ia64_dynamic_symbol_p (h, link_info, r_type)) 508 continue; 509 510 else 511 { 512 /* We can't do anything with undefined symbols. */ 513 if (h->root.type == bfd_link_hash_undefined 514 || h->root.type == bfd_link_hash_undefweak) 515 continue; 516 517 tsec = h->root.u.def.section; 518 toff = h->root.u.def.value; 519 } 520 521 symtype = h->type; 522 } 523 524 if (tsec->sec_info_type == SEC_INFO_TYPE_MERGE) 525 { 526 /* At this stage in linking, no SEC_MERGE symbol has been 527 adjusted, so all references to such symbols need to be 528 passed through _bfd_merged_section_offset. (Later, in 529 relocate_section, all SEC_MERGE symbols *except* for 530 section symbols have been adjusted.) 531 532 gas may reduce relocations against symbols in SEC_MERGE 533 sections to a relocation against the section symbol when 534 the original addend was zero. When the reloc is against 535 a section symbol we should include the addend in the 536 offset passed to _bfd_merged_section_offset, since the 537 location of interest is the original symbol. On the 538 other hand, an access to "sym+addend" where "sym" is not 539 a section symbol should not include the addend; Such an 540 access is presumed to be an offset from "sym"; The 541 location of interest is just "sym". */ 542 if (symtype == STT_SECTION) 543 toff += irel->r_addend; 544 545 toff = _bfd_merged_section_offset (abfd, &tsec, 546 elf_section_data (tsec)->sec_info, 547 toff); 548 549 if (symtype != STT_SECTION) 550 toff += irel->r_addend; 551 } 552 else 553 toff += irel->r_addend; 554 555 symaddr = tsec->output_section->vma + tsec->output_offset + toff; 556 557 roff = irel->r_offset; 558 559 if (is_branch) 560 { 561 bfd_signed_vma offset; 562 563 reladdr = (sec->output_section->vma 564 + sec->output_offset 565 + roff) & (bfd_vma) -4; 566 567 /* The .plt section is aligned at 32byte and the .text section 568 is aligned at 64byte. The .text section is right after the 569 .plt section. After the first relaxation pass, linker may 570 increase the gap between the .plt and .text sections up 571 to 32byte. We assume linker will always insert 32byte 572 between the .plt and .text sections after the first 573 relaxation pass. */ 574 if (tsec == ia64_info->root.splt) 575 offset = -0x1000000 + 32; 576 else 577 offset = -0x1000000; 578 579 /* If the branch is in range, no need to do anything. */ 580 if ((bfd_signed_vma) (symaddr - reladdr) >= offset 581 && (bfd_signed_vma) (symaddr - reladdr) <= 0x0FFFFF0) 582 { 583 /* If the 60-bit branch is in 21-bit range, optimize it. */ 584 if (r_type == R_IA64_PCREL60B) 585 { 586 ia64_elf_relax_brl (contents, roff); 587 588 irel->r_info 589 = ELFNN_R_INFO (ELFNN_R_SYM (irel->r_info), 590 R_IA64_PCREL21B); 591 592 /* If the original relocation offset points to slot 593 1, change it to slot 2. */ 594 if ((irel->r_offset & 3) == 1) 595 irel->r_offset += 1; 596 } 597 598 continue; 599 } 600 else if (r_type == R_IA64_PCREL60B) 601 continue; 602 else if (ia64_elf_relax_br (contents, roff)) 603 { 604 irel->r_info 605 = ELFNN_R_INFO (ELFNN_R_SYM (irel->r_info), 606 R_IA64_PCREL60B); 607 608 /* Make the relocation offset point to slot 1. */ 609 irel->r_offset = (irel->r_offset & ~((bfd_vma) 0x3)) + 1; 610 continue; 611 } 612 613 /* We can't put a trampoline in a .init/.fini section. Issue 614 an error. */ 615 if (strcmp (sec->output_section->name, ".init") == 0 616 || strcmp (sec->output_section->name, ".fini") == 0) 617 { 618 (*_bfd_error_handler) 619 (_("%B: Can't relax br at 0x%lx in section `%A'. Please use brl or indirect branch."), 620 sec->owner, sec, (unsigned long) roff); 621 bfd_set_error (bfd_error_bad_value); 622 goto error_return; 623 } 624 625 /* If the branch and target are in the same section, you've 626 got one honking big section and we can't help you unless 627 you are branching backwards. You'll get an error message 628 later. */ 629 if (tsec == sec && toff > roff) 630 continue; 631 632 /* Look for an existing fixup to this address. */ 633 for (f = fixups; f ; f = f->next) 634 if (f->tsec == tsec && f->toff == toff) 635 break; 636 637 if (f == NULL) 638 { 639 /* Two alternatives: If it's a branch to a PLT entry, we can 640 make a copy of the FULL_PLT entry. Otherwise, we'll have 641 to use a `brl' insn to get where we're going. */ 642 643 size_t size; 644 645 if (tsec == ia64_info->root.splt) 646 size = sizeof (plt_full_entry); 647 else 648 size = oor_branch_size; 649 650 /* Resize the current section to make room for the new branch. */ 651 trampoff = (sec->size + 15) & (bfd_vma) -16; 652 653 /* If trampoline is out of range, there is nothing we 654 can do. */ 655 offset = trampoff - (roff & (bfd_vma) -4); 656 if (offset < -0x1000000 || offset > 0x0FFFFF0) 657 continue; 658 659 amt = trampoff + size; 660 contents = (bfd_byte *) bfd_realloc (contents, amt); 661 if (contents == NULL) 662 goto error_return; 663 sec->size = amt; 664 665 if (tsec == ia64_info->root.splt) 666 { 667 memcpy (contents + trampoff, plt_full_entry, size); 668 669 /* Hijack the old relocation for use as the PLTOFF reloc. */ 670 irel->r_info = ELFNN_R_INFO (ELFNN_R_SYM (irel->r_info), 671 R_IA64_PLTOFF22); 672 irel->r_offset = trampoff; 673 } 674 else 675 { 676 if (size == sizeof (oor_ip)) 677 { 678 memcpy (contents + trampoff, oor_ip, size); 679 irel->r_info = ELFNN_R_INFO (ELFNN_R_SYM (irel->r_info), 680 R_IA64_PCREL64I); 681 irel->r_addend -= 16; 682 irel->r_offset = trampoff + 2; 683 } 684 else 685 { 686 memcpy (contents + trampoff, oor_brl, size); 687 irel->r_info = ELFNN_R_INFO (ELFNN_R_SYM (irel->r_info), 688 R_IA64_PCREL60B); 689 irel->r_offset = trampoff + 2; 690 } 691 692 } 693 694 /* Record the fixup so we don't do it again this section. */ 695 f = (struct one_fixup *) 696 bfd_malloc ((bfd_size_type) sizeof (*f)); 697 f->next = fixups; 698 f->tsec = tsec; 699 f->toff = toff; 700 f->trampoff = trampoff; 701 fixups = f; 702 } 703 else 704 { 705 /* If trampoline is out of range, there is nothing we 706 can do. */ 707 offset = f->trampoff - (roff & (bfd_vma) -4); 708 if (offset < -0x1000000 || offset > 0x0FFFFF0) 709 continue; 710 711 /* Nop out the reloc, since we're finalizing things here. */ 712 irel->r_info = ELFNN_R_INFO (0, R_IA64_NONE); 713 } 714 715 /* Fix up the existing branch to hit the trampoline. */ 716 if (ia64_elf_install_value (contents + roff, offset, r_type) 717 != bfd_reloc_ok) 718 goto error_return; 719 720 changed_contents = TRUE; 721 changed_relocs = TRUE; 722 } 723 else 724 { 725 /* Fetch the gp. */ 726 if (gp == 0) 727 { 728 bfd *obfd = sec->output_section->owner; 729 gp = _bfd_get_gp_value (obfd); 730 if (gp == 0) 731 { 732 if (!elfNN_ia64_choose_gp (obfd, link_info, FALSE)) 733 goto error_return; 734 gp = _bfd_get_gp_value (obfd); 735 } 736 } 737 738 /* If the data is out of range, do nothing. */ 739 if ((bfd_signed_vma) (symaddr - gp) >= 0x200000 740 ||(bfd_signed_vma) (symaddr - gp) < -0x200000) 741 continue; 742 743 if (r_type == R_IA64_GPREL22) 744 elfNN_ia64_update_short_info (tsec->output_section, 745 tsec->output_offset + toff, 746 ia64_info); 747 else if (r_type == R_IA64_LTOFF22X) 748 { 749 irel->r_info = ELFNN_R_INFO (ELFNN_R_SYM (irel->r_info), 750 R_IA64_GPREL22); 751 changed_relocs = TRUE; 752 if (dyn_i->want_gotx) 753 { 754 dyn_i->want_gotx = 0; 755 changed_got |= !dyn_i->want_got; 756 } 757 758 elfNN_ia64_update_short_info (tsec->output_section, 759 tsec->output_offset + toff, 760 ia64_info); 761 } 762 else 763 { 764 ia64_elf_relax_ldxmov (contents, roff); 765 irel->r_info = ELFNN_R_INFO (0, R_IA64_NONE); 766 changed_contents = TRUE; 767 changed_relocs = TRUE; 768 } 769 } 770 } 771 772 /* ??? If we created fixups, this may push the code segment large 773 enough that the data segment moves, which will change the GP. 774 Reset the GP so that we re-calculate next round. We need to 775 do this at the _beginning_ of the next round; now will not do. */ 776 777 /* Clean up and go home. */ 778 while (fixups) 779 { 780 struct one_fixup *f = fixups; 781 fixups = fixups->next; 782 free (f); 783 } 784 785 if (isymbuf != NULL 786 && symtab_hdr->contents != (unsigned char *) isymbuf) 787 { 788 if (! link_info->keep_memory) 789 free (isymbuf); 790 else 791 { 792 /* Cache the symbols for elf_link_input_bfd. */ 793 symtab_hdr->contents = (unsigned char *) isymbuf; 794 } 795 } 796 797 if (contents != NULL 798 && elf_section_data (sec)->this_hdr.contents != contents) 799 { 800 if (!changed_contents && !link_info->keep_memory) 801 free (contents); 802 else 803 { 804 /* Cache the section contents for elf_link_input_bfd. */ 805 elf_section_data (sec)->this_hdr.contents = contents; 806 } 807 } 808 809 if (elf_section_data (sec)->relocs != internal_relocs) 810 { 811 if (!changed_relocs) 812 free (internal_relocs); 813 else 814 elf_section_data (sec)->relocs = internal_relocs; 815 } 816 817 if (changed_got) 818 { 819 struct elfNN_ia64_allocate_data data; 820 data.info = link_info; 821 data.ofs = 0; 822 ia64_info->self_dtpmod_offset = (bfd_vma) -1; 823 824 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_global_data_got, &data); 825 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_global_fptr_got, &data); 826 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_local_got, &data); 827 ia64_info->root.sgot->size = data.ofs; 828 829 if (ia64_info->root.dynamic_sections_created 830 && ia64_info->root.srelgot != NULL) 831 { 832 /* Resize .rela.got. */ 833 ia64_info->root.srelgot->size = 0; 834 if (bfd_link_pic (link_info) 835 && ia64_info->self_dtpmod_offset != (bfd_vma) -1) 836 ia64_info->root.srelgot->size += sizeof (ElfNN_External_Rela); 837 data.only_got = TRUE; 838 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_dynrel_entries, 839 &data); 840 } 841 } 842 843 if (link_info->relax_pass == 0) 844 { 845 /* Pass 0 is only needed to relax br. */ 846 sec->skip_relax_pass_0 = skip_relax_pass_0; 847 sec->skip_relax_pass_1 = skip_relax_pass_1; 848 } 849 850 *again = changed_contents || changed_relocs; 851 return TRUE; 852 853 error_return: 854 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents) 855 free (isymbuf); 856 if (contents != NULL 857 && elf_section_data (sec)->this_hdr.contents != contents) 858 free (contents); 859 if (internal_relocs != NULL 860 && elf_section_data (sec)->relocs != internal_relocs) 861 free (internal_relocs); 862 return FALSE; 863} 864#undef skip_relax_pass_0 865#undef skip_relax_pass_1 866 867/* Return TRUE if NAME is an unwind table section name. */ 868 869static inline bfd_boolean 870is_unwind_section_name (bfd *abfd, const char *name) 871{ 872 if (elfNN_ia64_hpux_vec (abfd->xvec) 873 && !strcmp (name, ELF_STRING_ia64_unwind_hdr)) 874 return FALSE; 875 876 return ((CONST_STRNEQ (name, ELF_STRING_ia64_unwind) 877 && ! CONST_STRNEQ (name, ELF_STRING_ia64_unwind_info)) 878 || CONST_STRNEQ (name, ELF_STRING_ia64_unwind_once)); 879} 880 881/* Handle an IA-64 specific section when reading an object file. This 882 is called when bfd_section_from_shdr finds a section with an unknown 883 type. */ 884 885static bfd_boolean 886elfNN_ia64_section_from_shdr (bfd *abfd, 887 Elf_Internal_Shdr *hdr, 888 const char *name, 889 int shindex) 890{ 891 /* There ought to be a place to keep ELF backend specific flags, but 892 at the moment there isn't one. We just keep track of the 893 sections by their name, instead. Fortunately, the ABI gives 894 suggested names for all the MIPS specific sections, so we will 895 probably get away with this. */ 896 switch (hdr->sh_type) 897 { 898 case SHT_IA_64_UNWIND: 899 case SHT_IA_64_HP_OPT_ANOT: 900 break; 901 902 case SHT_IA_64_EXT: 903 if (strcmp (name, ELF_STRING_ia64_archext) != 0) 904 return FALSE; 905 break; 906 907 default: 908 return FALSE; 909 } 910 911 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) 912 return FALSE; 913 914 return TRUE; 915} 916 917/* Convert IA-64 specific section flags to bfd internal section flags. */ 918 919/* ??? There is no bfd internal flag equivalent to the SHF_IA_64_NORECOV 920 flag. */ 921 922static bfd_boolean 923elfNN_ia64_section_flags (flagword *flags, 924 const Elf_Internal_Shdr *hdr) 925{ 926 if (hdr->sh_flags & SHF_IA_64_SHORT) 927 *flags |= SEC_SMALL_DATA; 928 929 return TRUE; 930} 931 932/* Set the correct type for an IA-64 ELF section. We do this by the 933 section name, which is a hack, but ought to work. */ 934 935static bfd_boolean 936elfNN_ia64_fake_sections (bfd *abfd, Elf_Internal_Shdr *hdr, 937 asection *sec) 938{ 939 const char *name; 940 941 name = bfd_get_section_name (abfd, sec); 942 943 if (is_unwind_section_name (abfd, name)) 944 { 945 /* We don't have the sections numbered at this point, so sh_info 946 is set later, in elfNN_ia64_final_write_processing. */ 947 hdr->sh_type = SHT_IA_64_UNWIND; 948 hdr->sh_flags |= SHF_LINK_ORDER; 949 } 950 else if (strcmp (name, ELF_STRING_ia64_archext) == 0) 951 hdr->sh_type = SHT_IA_64_EXT; 952 else if (strcmp (name, ".HP.opt_annot") == 0) 953 hdr->sh_type = SHT_IA_64_HP_OPT_ANOT; 954 else if (strcmp (name, ".reloc") == 0) 955 /* This is an ugly, but unfortunately necessary hack that is 956 needed when producing EFI binaries on IA-64. It tells 957 elf.c:elf_fake_sections() not to consider ".reloc" as a section 958 containing ELF relocation info. We need this hack in order to 959 be able to generate ELF binaries that can be translated into 960 EFI applications (which are essentially COFF objects). Those 961 files contain a COFF ".reloc" section inside an ELFNN object, 962 which would normally cause BFD to segfault because it would 963 attempt to interpret this section as containing relocation 964 entries for section "oc". With this hack enabled, ".reloc" 965 will be treated as a normal data section, which will avoid the 966 segfault. However, you won't be able to create an ELFNN binary 967 with a section named "oc" that needs relocations, but that's 968 the kind of ugly side-effects you get when detecting section 969 types based on their names... In practice, this limitation is 970 unlikely to bite. */ 971 hdr->sh_type = SHT_PROGBITS; 972 973 if (sec->flags & SEC_SMALL_DATA) 974 hdr->sh_flags |= SHF_IA_64_SHORT; 975 976 /* Some HP linkers look for the SHF_IA_64_HP_TLS flag instead of SHF_TLS. */ 977 978 if (elfNN_ia64_hpux_vec (abfd->xvec) && (sec->flags & SHF_TLS)) 979 hdr->sh_flags |= SHF_IA_64_HP_TLS; 980 981 return TRUE; 982} 983 984/* The final processing done just before writing out an IA-64 ELF 985 object file. */ 986 987static void 988elfNN_ia64_final_write_processing (bfd *abfd, 989 bfd_boolean linker ATTRIBUTE_UNUSED) 990{ 991 Elf_Internal_Shdr *hdr; 992 asection *s; 993 994 for (s = abfd->sections; s; s = s->next) 995 { 996 hdr = &elf_section_data (s)->this_hdr; 997 switch (hdr->sh_type) 998 { 999 case SHT_IA_64_UNWIND: 1000 /* The IA-64 processor-specific ABI requires setting sh_link 1001 to the unwind section, whereas HP-UX requires sh_info to 1002 do so. For maximum compatibility, we'll set both for 1003 now... */ 1004 hdr->sh_info = hdr->sh_link; 1005 break; 1006 } 1007 } 1008 1009 if (! elf_flags_init (abfd)) 1010 { 1011 unsigned long flags = 0; 1012 1013 if (abfd->xvec->byteorder == BFD_ENDIAN_BIG) 1014 flags |= EF_IA_64_BE; 1015 if (bfd_get_mach (abfd) == bfd_mach_ia64_elf64) 1016 flags |= EF_IA_64_ABI64; 1017 1018 elf_elfheader(abfd)->e_flags = flags; 1019 elf_flags_init (abfd) = TRUE; 1020 } 1021} 1022 1023/* Hook called by the linker routine which adds symbols from an object 1024 file. We use it to put .comm items in .sbss, and not .bss. */ 1025 1026static bfd_boolean 1027elfNN_ia64_add_symbol_hook (bfd *abfd, 1028 struct bfd_link_info *info, 1029 Elf_Internal_Sym *sym, 1030 const char **namep ATTRIBUTE_UNUSED, 1031 flagword *flagsp ATTRIBUTE_UNUSED, 1032 asection **secp, 1033 bfd_vma *valp) 1034{ 1035 if (sym->st_shndx == SHN_COMMON 1036 && !bfd_link_relocatable (info) 1037 && sym->st_size <= elf_gp_size (abfd)) 1038 { 1039 /* Common symbols less than or equal to -G nn bytes are 1040 automatically put into .sbss. */ 1041 1042 asection *scomm = bfd_get_section_by_name (abfd, ".scommon"); 1043 1044 if (scomm == NULL) 1045 { 1046 scomm = bfd_make_section_with_flags (abfd, ".scommon", 1047 (SEC_ALLOC 1048 | SEC_IS_COMMON 1049 | SEC_LINKER_CREATED)); 1050 if (scomm == NULL) 1051 return FALSE; 1052 } 1053 1054 *secp = scomm; 1055 *valp = sym->st_size; 1056 } 1057 1058 return TRUE; 1059} 1060 1061/* Return the number of additional phdrs we will need. */ 1062 1063static int 1064elfNN_ia64_additional_program_headers (bfd *abfd, 1065 struct bfd_link_info *info ATTRIBUTE_UNUSED) 1066{ 1067 asection *s; 1068 int ret = 0; 1069 1070 /* See if we need a PT_IA_64_ARCHEXT segment. */ 1071 s = bfd_get_section_by_name (abfd, ELF_STRING_ia64_archext); 1072 if (s && (s->flags & SEC_LOAD)) 1073 ++ret; 1074 1075 /* Count how many PT_IA_64_UNWIND segments we need. */ 1076 for (s = abfd->sections; s; s = s->next) 1077 if (is_unwind_section_name (abfd, s->name) && (s->flags & SEC_LOAD)) 1078 ++ret; 1079 1080 return ret; 1081} 1082 1083static bfd_boolean 1084elfNN_ia64_modify_segment_map (bfd *abfd, 1085 struct bfd_link_info *info ATTRIBUTE_UNUSED) 1086{ 1087 struct elf_segment_map *m, **pm; 1088 Elf_Internal_Shdr *hdr; 1089 asection *s; 1090 1091 /* If we need a PT_IA_64_ARCHEXT segment, it must come before 1092 all PT_LOAD segments. */ 1093 s = bfd_get_section_by_name (abfd, ELF_STRING_ia64_archext); 1094 if (s && (s->flags & SEC_LOAD)) 1095 { 1096 for (m = elf_seg_map (abfd); m != NULL; m = m->next) 1097 if (m->p_type == PT_IA_64_ARCHEXT) 1098 break; 1099 if (m == NULL) 1100 { 1101 m = ((struct elf_segment_map *) 1102 bfd_zalloc (abfd, (bfd_size_type) sizeof *m)); 1103 if (m == NULL) 1104 return FALSE; 1105 1106 m->p_type = PT_IA_64_ARCHEXT; 1107 m->count = 1; 1108 m->sections[0] = s; 1109 1110 /* We want to put it after the PHDR and INTERP segments. */ 1111 pm = &elf_seg_map (abfd); 1112 while (*pm != NULL 1113 && ((*pm)->p_type == PT_PHDR 1114 || (*pm)->p_type == PT_INTERP)) 1115 pm = &(*pm)->next; 1116 1117 m->next = *pm; 1118 *pm = m; 1119 } 1120 } 1121 1122 /* Install PT_IA_64_UNWIND segments, if needed. */ 1123 for (s = abfd->sections; s; s = s->next) 1124 { 1125 hdr = &elf_section_data (s)->this_hdr; 1126 if (hdr->sh_type != SHT_IA_64_UNWIND) 1127 continue; 1128 1129 if (s && (s->flags & SEC_LOAD)) 1130 { 1131 for (m = elf_seg_map (abfd); m != NULL; m = m->next) 1132 if (m->p_type == PT_IA_64_UNWIND) 1133 { 1134 int i; 1135 1136 /* Look through all sections in the unwind segment 1137 for a match since there may be multiple sections 1138 to a segment. */ 1139 for (i = m->count - 1; i >= 0; --i) 1140 if (m->sections[i] == s) 1141 break; 1142 1143 if (i >= 0) 1144 break; 1145 } 1146 1147 if (m == NULL) 1148 { 1149 m = ((struct elf_segment_map *) 1150 bfd_zalloc (abfd, (bfd_size_type) sizeof *m)); 1151 if (m == NULL) 1152 return FALSE; 1153 1154 m->p_type = PT_IA_64_UNWIND; 1155 m->count = 1; 1156 m->sections[0] = s; 1157 m->next = NULL; 1158 1159 /* We want to put it last. */ 1160 pm = &elf_seg_map (abfd); 1161 while (*pm != NULL) 1162 pm = &(*pm)->next; 1163 *pm = m; 1164 } 1165 } 1166 } 1167 1168 return TRUE; 1169} 1170 1171/* Turn on PF_IA_64_NORECOV if needed. This involves traversing all of 1172 the input sections for each output section in the segment and testing 1173 for SHF_IA_64_NORECOV on each. */ 1174 1175static bfd_boolean 1176elfNN_ia64_modify_program_headers (bfd *abfd, 1177 struct bfd_link_info *info ATTRIBUTE_UNUSED) 1178{ 1179 struct elf_obj_tdata *tdata = elf_tdata (abfd); 1180 struct elf_segment_map *m; 1181 Elf_Internal_Phdr *p; 1182 1183 for (p = tdata->phdr, m = elf_seg_map (abfd); m != NULL; m = m->next, p++) 1184 if (m->p_type == PT_LOAD) 1185 { 1186 int i; 1187 for (i = m->count - 1; i >= 0; --i) 1188 { 1189 struct bfd_link_order *order = m->sections[i]->map_head.link_order; 1190 1191 while (order != NULL) 1192 { 1193 if (order->type == bfd_indirect_link_order) 1194 { 1195 asection *is = order->u.indirect.section; 1196 bfd_vma flags = elf_section_data(is)->this_hdr.sh_flags; 1197 if (flags & SHF_IA_64_NORECOV) 1198 { 1199 p->p_flags |= PF_IA_64_NORECOV; 1200 goto found; 1201 } 1202 } 1203 order = order->next; 1204 } 1205 } 1206 found:; 1207 } 1208 1209 return TRUE; 1210} 1211 1212/* According to the Tahoe assembler spec, all labels starting with a 1213 '.' are local. */ 1214 1215static bfd_boolean 1216elfNN_ia64_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED, 1217 const char *name) 1218{ 1219 return name[0] == '.'; 1220} 1221 1222/* Should we do dynamic things to this symbol? */ 1223 1224static bfd_boolean 1225elfNN_ia64_dynamic_symbol_p (struct elf_link_hash_entry *h, 1226 struct bfd_link_info *info, int r_type) 1227{ 1228 bfd_boolean ignore_protected 1229 = ((r_type & 0xf8) == 0x40 /* FPTR relocs */ 1230 || (r_type & 0xf8) == 0x50); /* LTOFF_FPTR relocs */ 1231 1232 return _bfd_elf_dynamic_symbol_p (h, info, ignore_protected); 1233} 1234 1235static struct bfd_hash_entry* 1236elfNN_ia64_new_elf_hash_entry (struct bfd_hash_entry *entry, 1237 struct bfd_hash_table *table, 1238 const char *string) 1239{ 1240 struct elfNN_ia64_link_hash_entry *ret; 1241 ret = (struct elfNN_ia64_link_hash_entry *) entry; 1242 1243 /* Allocate the structure if it has not already been allocated by a 1244 subclass. */ 1245 if (!ret) 1246 ret = bfd_hash_allocate (table, sizeof (*ret)); 1247 1248 if (!ret) 1249 return 0; 1250 1251 /* Call the allocation method of the superclass. */ 1252 ret = ((struct elfNN_ia64_link_hash_entry *) 1253 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, 1254 table, string)); 1255 1256 ret->info = NULL; 1257 ret->count = 0; 1258 ret->sorted_count = 0; 1259 ret->size = 0; 1260 return (struct bfd_hash_entry *) ret; 1261} 1262 1263static void 1264elfNN_ia64_hash_copy_indirect (struct bfd_link_info *info, 1265 struct elf_link_hash_entry *xdir, 1266 struct elf_link_hash_entry *xind) 1267{ 1268 struct elfNN_ia64_link_hash_entry *dir, *ind; 1269 1270 dir = (struct elfNN_ia64_link_hash_entry *) xdir; 1271 ind = (struct elfNN_ia64_link_hash_entry *) xind; 1272 1273 /* Copy down any references that we may have already seen to the 1274 symbol which just became indirect. */ 1275 1276 dir->root.ref_dynamic |= ind->root.ref_dynamic; 1277 dir->root.ref_regular |= ind->root.ref_regular; 1278 dir->root.ref_regular_nonweak |= ind->root.ref_regular_nonweak; 1279 dir->root.needs_plt |= ind->root.needs_plt; 1280 1281 if (ind->root.root.type != bfd_link_hash_indirect) 1282 return; 1283 1284 /* Copy over the got and plt data. This would have been done 1285 by check_relocs. */ 1286 1287 if (ind->info != NULL) 1288 { 1289 struct elfNN_ia64_dyn_sym_info *dyn_i; 1290 unsigned int count; 1291 1292 if (dir->info) 1293 free (dir->info); 1294 1295 dir->info = ind->info; 1296 dir->count = ind->count; 1297 dir->sorted_count = ind->sorted_count; 1298 dir->size = ind->size; 1299 1300 ind->info = NULL; 1301 ind->count = 0; 1302 ind->sorted_count = 0; 1303 ind->size = 0; 1304 1305 /* Fix up the dyn_sym_info pointers to the global symbol. */ 1306 for (count = dir->count, dyn_i = dir->info; 1307 count != 0; 1308 count--, dyn_i++) 1309 dyn_i->h = &dir->root; 1310 } 1311 1312 /* Copy over the dynindx. */ 1313 1314 if (ind->root.dynindx != -1) 1315 { 1316 if (dir->root.dynindx != -1) 1317 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, 1318 dir->root.dynstr_index); 1319 dir->root.dynindx = ind->root.dynindx; 1320 dir->root.dynstr_index = ind->root.dynstr_index; 1321 ind->root.dynindx = -1; 1322 ind->root.dynstr_index = 0; 1323 } 1324} 1325 1326static void 1327elfNN_ia64_hash_hide_symbol (struct bfd_link_info *info, 1328 struct elf_link_hash_entry *xh, 1329 bfd_boolean force_local) 1330{ 1331 struct elfNN_ia64_link_hash_entry *h; 1332 struct elfNN_ia64_dyn_sym_info *dyn_i; 1333 unsigned int count; 1334 1335 h = (struct elfNN_ia64_link_hash_entry *)xh; 1336 1337 _bfd_elf_link_hash_hide_symbol (info, &h->root, force_local); 1338 1339 for (count = h->count, dyn_i = h->info; 1340 count != 0; 1341 count--, dyn_i++) 1342 { 1343 dyn_i->want_plt2 = 0; 1344 dyn_i->want_plt = 0; 1345 } 1346} 1347 1348/* Compute a hash of a local hash entry. */ 1349 1350static hashval_t 1351elfNN_ia64_local_htab_hash (const void *ptr) 1352{ 1353 struct elfNN_ia64_local_hash_entry *entry 1354 = (struct elfNN_ia64_local_hash_entry *) ptr; 1355 1356 return ELF_LOCAL_SYMBOL_HASH (entry->id, entry->r_sym); 1357} 1358 1359/* Compare local hash entries. */ 1360 1361static int 1362elfNN_ia64_local_htab_eq (const void *ptr1, const void *ptr2) 1363{ 1364 struct elfNN_ia64_local_hash_entry *entry1 1365 = (struct elfNN_ia64_local_hash_entry *) ptr1; 1366 struct elfNN_ia64_local_hash_entry *entry2 1367 = (struct elfNN_ia64_local_hash_entry *) ptr2; 1368 1369 return entry1->id == entry2->id && entry1->r_sym == entry2->r_sym; 1370} 1371 1372/* Free the global elfNN_ia64_dyn_sym_info array. */ 1373 1374static bfd_boolean 1375elfNN_ia64_global_dyn_info_free (void **xentry, 1376 void * unused ATTRIBUTE_UNUSED) 1377{ 1378 struct elfNN_ia64_link_hash_entry *entry 1379 = (struct elfNN_ia64_link_hash_entry *) xentry; 1380 1381 if (entry->info) 1382 { 1383 free (entry->info); 1384 entry->info = NULL; 1385 entry->count = 0; 1386 entry->sorted_count = 0; 1387 entry->size = 0; 1388 } 1389 1390 return TRUE; 1391} 1392 1393/* Free the local elfNN_ia64_dyn_sym_info array. */ 1394 1395static bfd_boolean 1396elfNN_ia64_local_dyn_info_free (void **slot, 1397 void * unused ATTRIBUTE_UNUSED) 1398{ 1399 struct elfNN_ia64_local_hash_entry *entry 1400 = (struct elfNN_ia64_local_hash_entry *) *slot; 1401 1402 if (entry->info) 1403 { 1404 free (entry->info); 1405 entry->info = NULL; 1406 entry->count = 0; 1407 entry->sorted_count = 0; 1408 entry->size = 0; 1409 } 1410 1411 return TRUE; 1412} 1413 1414/* Destroy IA-64 linker hash table. */ 1415 1416static void 1417elfNN_ia64_link_hash_table_free (bfd *obfd) 1418{ 1419 struct elfNN_ia64_link_hash_table *ia64_info 1420 = (struct elfNN_ia64_link_hash_table *) obfd->link.hash; 1421 if (ia64_info->loc_hash_table) 1422 { 1423 htab_traverse (ia64_info->loc_hash_table, 1424 elfNN_ia64_local_dyn_info_free, NULL); 1425 htab_delete (ia64_info->loc_hash_table); 1426 } 1427 if (ia64_info->loc_hash_memory) 1428 objalloc_free ((struct objalloc *) ia64_info->loc_hash_memory); 1429 elf_link_hash_traverse (&ia64_info->root, 1430 elfNN_ia64_global_dyn_info_free, NULL); 1431 _bfd_elf_link_hash_table_free (obfd); 1432} 1433 1434/* Create the derived linker hash table. The IA-64 ELF port uses this 1435 derived hash table to keep information specific to the IA-64 ElF 1436 linker (without using static variables). */ 1437 1438static struct bfd_link_hash_table * 1439elfNN_ia64_hash_table_create (bfd *abfd) 1440{ 1441 struct elfNN_ia64_link_hash_table *ret; 1442 1443 ret = bfd_zmalloc ((bfd_size_type) sizeof (*ret)); 1444 if (!ret) 1445 return NULL; 1446 1447 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, 1448 elfNN_ia64_new_elf_hash_entry, 1449 sizeof (struct elfNN_ia64_link_hash_entry), 1450 IA64_ELF_DATA)) 1451 { 1452 free (ret); 1453 return NULL; 1454 } 1455 1456 ret->loc_hash_table = htab_try_create (1024, elfNN_ia64_local_htab_hash, 1457 elfNN_ia64_local_htab_eq, NULL); 1458 ret->loc_hash_memory = objalloc_create (); 1459 if (!ret->loc_hash_table || !ret->loc_hash_memory) 1460 { 1461 elfNN_ia64_link_hash_table_free (abfd); 1462 return NULL; 1463 } 1464 ret->root.root.hash_table_free = elfNN_ia64_link_hash_table_free; 1465 1466 return &ret->root.root; 1467} 1468 1469/* Traverse both local and global hash tables. */ 1470 1471struct elfNN_ia64_dyn_sym_traverse_data 1472{ 1473 bfd_boolean (*func) (struct elfNN_ia64_dyn_sym_info *, void *); 1474 void * data; 1475}; 1476 1477static bfd_boolean 1478elfNN_ia64_global_dyn_sym_thunk (struct bfd_hash_entry *xentry, 1479 void * xdata) 1480{ 1481 struct elfNN_ia64_link_hash_entry *entry 1482 = (struct elfNN_ia64_link_hash_entry *) xentry; 1483 struct elfNN_ia64_dyn_sym_traverse_data *data 1484 = (struct elfNN_ia64_dyn_sym_traverse_data *) xdata; 1485 struct elfNN_ia64_dyn_sym_info *dyn_i; 1486 unsigned int count; 1487 1488 for (count = entry->count, dyn_i = entry->info; 1489 count != 0; 1490 count--, dyn_i++) 1491 if (! (*data->func) (dyn_i, data->data)) 1492 return FALSE; 1493 return TRUE; 1494} 1495 1496static bfd_boolean 1497elfNN_ia64_local_dyn_sym_thunk (void **slot, void * xdata) 1498{ 1499 struct elfNN_ia64_local_hash_entry *entry 1500 = (struct elfNN_ia64_local_hash_entry *) *slot; 1501 struct elfNN_ia64_dyn_sym_traverse_data *data 1502 = (struct elfNN_ia64_dyn_sym_traverse_data *) xdata; 1503 struct elfNN_ia64_dyn_sym_info *dyn_i; 1504 unsigned int count; 1505 1506 for (count = entry->count, dyn_i = entry->info; 1507 count != 0; 1508 count--, dyn_i++) 1509 if (! (*data->func) (dyn_i, data->data)) 1510 return FALSE; 1511 return TRUE; 1512} 1513 1514static void 1515elfNN_ia64_dyn_sym_traverse (struct elfNN_ia64_link_hash_table *ia64_info, 1516 bfd_boolean (*func) (struct elfNN_ia64_dyn_sym_info *, void *), 1517 void * data) 1518{ 1519 struct elfNN_ia64_dyn_sym_traverse_data xdata; 1520 1521 xdata.func = func; 1522 xdata.data = data; 1523 1524 elf_link_hash_traverse (&ia64_info->root, 1525 elfNN_ia64_global_dyn_sym_thunk, &xdata); 1526 htab_traverse (ia64_info->loc_hash_table, 1527 elfNN_ia64_local_dyn_sym_thunk, &xdata); 1528} 1529 1530static bfd_boolean 1531elfNN_ia64_create_dynamic_sections (bfd *abfd, 1532 struct bfd_link_info *info) 1533{ 1534 struct elfNN_ia64_link_hash_table *ia64_info; 1535 asection *s; 1536 1537 if (! _bfd_elf_create_dynamic_sections (abfd, info)) 1538 return FALSE; 1539 1540 ia64_info = elfNN_ia64_hash_table (info); 1541 if (ia64_info == NULL) 1542 return FALSE; 1543 1544 { 1545 flagword flags = bfd_get_section_flags (abfd, ia64_info->root.sgot); 1546 bfd_set_section_flags (abfd, ia64_info->root.sgot, 1547 SEC_SMALL_DATA | flags); 1548 /* The .got section is always aligned at 8 bytes. */ 1549 if (! bfd_set_section_alignment (abfd, ia64_info->root.sgot, 3)) 1550 return FALSE; 1551 } 1552 1553 if (!get_pltoff (abfd, info, ia64_info)) 1554 return FALSE; 1555 1556 s = bfd_make_section_anyway_with_flags (abfd, ".rela.IA_64.pltoff", 1557 (SEC_ALLOC | SEC_LOAD 1558 | SEC_HAS_CONTENTS 1559 | SEC_IN_MEMORY 1560 | SEC_LINKER_CREATED 1561 | SEC_READONLY)); 1562 if (s == NULL 1563 || !bfd_set_section_alignment (abfd, s, LOG_SECTION_ALIGN)) 1564 return FALSE; 1565 ia64_info->rel_pltoff_sec = s; 1566 1567 return TRUE; 1568} 1569 1570/* Find and/or create a hash entry for local symbol. */ 1571static struct elfNN_ia64_local_hash_entry * 1572get_local_sym_hash (struct elfNN_ia64_link_hash_table *ia64_info, 1573 bfd *abfd, const Elf_Internal_Rela *rel, 1574 bfd_boolean create) 1575{ 1576 struct elfNN_ia64_local_hash_entry e, *ret; 1577 asection *sec = abfd->sections; 1578 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id, 1579 ELFNN_R_SYM (rel->r_info)); 1580 void **slot; 1581 1582 e.id = sec->id; 1583 e.r_sym = ELFNN_R_SYM (rel->r_info); 1584 slot = htab_find_slot_with_hash (ia64_info->loc_hash_table, &e, h, 1585 create ? INSERT : NO_INSERT); 1586 1587 if (!slot) 1588 return NULL; 1589 1590 if (*slot) 1591 return (struct elfNN_ia64_local_hash_entry *) *slot; 1592 1593 ret = (struct elfNN_ia64_local_hash_entry *) 1594 objalloc_alloc ((struct objalloc *) ia64_info->loc_hash_memory, 1595 sizeof (struct elfNN_ia64_local_hash_entry)); 1596 if (ret) 1597 { 1598 memset (ret, 0, sizeof (*ret)); 1599 ret->id = sec->id; 1600 ret->r_sym = ELFNN_R_SYM (rel->r_info); 1601 *slot = ret; 1602 } 1603 return ret; 1604} 1605 1606/* Used to sort elfNN_ia64_dyn_sym_info array. */ 1607 1608static int 1609addend_compare (const void *xp, const void *yp) 1610{ 1611 const struct elfNN_ia64_dyn_sym_info *x 1612 = (const struct elfNN_ia64_dyn_sym_info *) xp; 1613 const struct elfNN_ia64_dyn_sym_info *y 1614 = (const struct elfNN_ia64_dyn_sym_info *) yp; 1615 1616 return x->addend < y->addend ? -1 : x->addend > y->addend ? 1 : 0; 1617} 1618 1619/* Sort elfNN_ia64_dyn_sym_info array and remove duplicates. */ 1620 1621static unsigned int 1622sort_dyn_sym_info (struct elfNN_ia64_dyn_sym_info *info, 1623 unsigned int count) 1624{ 1625 bfd_vma curr, prev, got_offset; 1626 unsigned int i, kept, dupes, diff, dest, src, len; 1627 1628 qsort (info, count, sizeof (*info), addend_compare); 1629 1630 /* Find the first duplicate. */ 1631 prev = info [0].addend; 1632 got_offset = info [0].got_offset; 1633 for (i = 1; i < count; i++) 1634 { 1635 curr = info [i].addend; 1636 if (curr == prev) 1637 { 1638 /* For duplicates, make sure that GOT_OFFSET is valid. */ 1639 if (got_offset == (bfd_vma) -1) 1640 got_offset = info [i].got_offset; 1641 break; 1642 } 1643 got_offset = info [i].got_offset; 1644 prev = curr; 1645 } 1646 1647 /* We may move a block of elements to here. */ 1648 dest = i++; 1649 1650 /* Remove duplicates. */ 1651 if (i < count) 1652 { 1653 while (i < count) 1654 { 1655 /* For duplicates, make sure that the kept one has a valid 1656 got_offset. */ 1657 kept = dest - 1; 1658 if (got_offset != (bfd_vma) -1) 1659 info [kept].got_offset = got_offset; 1660 1661 curr = info [i].addend; 1662 got_offset = info [i].got_offset; 1663 1664 /* Move a block of elements whose first one is different from 1665 the previous. */ 1666 if (curr == prev) 1667 { 1668 for (src = i + 1; src < count; src++) 1669 { 1670 if (info [src].addend != curr) 1671 break; 1672 /* For duplicates, make sure that GOT_OFFSET is 1673 valid. */ 1674 if (got_offset == (bfd_vma) -1) 1675 got_offset = info [src].got_offset; 1676 } 1677 1678 /* Make sure that the kept one has a valid got_offset. */ 1679 if (got_offset != (bfd_vma) -1) 1680 info [kept].got_offset = got_offset; 1681 } 1682 else 1683 src = i; 1684 1685 if (src >= count) 1686 break; 1687 1688 /* Find the next duplicate. SRC will be kept. */ 1689 prev = info [src].addend; 1690 got_offset = info [src].got_offset; 1691 for (dupes = src + 1; dupes < count; dupes ++) 1692 { 1693 curr = info [dupes].addend; 1694 if (curr == prev) 1695 { 1696 /* Make sure that got_offset is valid. */ 1697 if (got_offset == (bfd_vma) -1) 1698 got_offset = info [dupes].got_offset; 1699 1700 /* For duplicates, make sure that the kept one has 1701 a valid got_offset. */ 1702 if (got_offset != (bfd_vma) -1) 1703 info [dupes - 1].got_offset = got_offset; 1704 break; 1705 } 1706 got_offset = info [dupes].got_offset; 1707 prev = curr; 1708 } 1709 1710 /* How much to move. */ 1711 len = dupes - src; 1712 i = dupes + 1; 1713 1714 if (len == 1 && dupes < count) 1715 { 1716 /* If we only move 1 element, we combine it with the next 1717 one. There must be at least a duplicate. Find the 1718 next different one. */ 1719 for (diff = dupes + 1, src++; diff < count; diff++, src++) 1720 { 1721 if (info [diff].addend != curr) 1722 break; 1723 /* Make sure that got_offset is valid. */ 1724 if (got_offset == (bfd_vma) -1) 1725 got_offset = info [diff].got_offset; 1726 } 1727 1728 /* Makre sure that the last duplicated one has an valid 1729 offset. */ 1730 BFD_ASSERT (curr == prev); 1731 if (got_offset != (bfd_vma) -1) 1732 info [diff - 1].got_offset = got_offset; 1733 1734 if (diff < count) 1735 { 1736 /* Find the next duplicate. Track the current valid 1737 offset. */ 1738 prev = info [diff].addend; 1739 got_offset = info [diff].got_offset; 1740 for (dupes = diff + 1; dupes < count; dupes ++) 1741 { 1742 curr = info [dupes].addend; 1743 if (curr == prev) 1744 { 1745 /* For duplicates, make sure that GOT_OFFSET 1746 is valid. */ 1747 if (got_offset == (bfd_vma) -1) 1748 got_offset = info [dupes].got_offset; 1749 break; 1750 } 1751 got_offset = info [dupes].got_offset; 1752 prev = curr; 1753 diff++; 1754 } 1755 1756 len = diff - src + 1; 1757 i = diff + 1; 1758 } 1759 } 1760 1761 memmove (&info [dest], &info [src], len * sizeof (*info)); 1762 1763 dest += len; 1764 } 1765 1766 count = dest; 1767 } 1768 else 1769 { 1770 /* When we get here, either there is no duplicate at all or 1771 the only duplicate is the last element. */ 1772 if (dest < count) 1773 { 1774 /* If the last element is a duplicate, make sure that the 1775 kept one has a valid got_offset. We also update count. */ 1776 if (got_offset != (bfd_vma) -1) 1777 info [dest - 1].got_offset = got_offset; 1778 count = dest; 1779 } 1780 } 1781 1782 return count; 1783} 1784 1785/* Find and/or create a descriptor for dynamic symbol info. This will 1786 vary based on global or local symbol, and the addend to the reloc. 1787 1788 We don't sort when inserting. Also, we sort and eliminate 1789 duplicates if there is an unsorted section. Typically, this will 1790 only happen once, because we do all insertions before lookups. We 1791 then use bsearch to do a lookup. This also allows lookups to be 1792 fast. So we have fast insertion (O(log N) due to duplicate check), 1793 fast lookup (O(log N)) and one sort (O(N log N) expected time). 1794 Previously, all lookups were O(N) because of the use of the linked 1795 list and also all insertions were O(N) because of the check for 1796 duplicates. There are some complications here because the array 1797 size grows occasionally, which may add an O(N) factor, but this 1798 should be rare. Also, we free the excess array allocation, which 1799 requires a copy which is O(N), but this only happens once. */ 1800 1801static struct elfNN_ia64_dyn_sym_info * 1802get_dyn_sym_info (struct elfNN_ia64_link_hash_table *ia64_info, 1803 struct elf_link_hash_entry *h, bfd *abfd, 1804 const Elf_Internal_Rela *rel, bfd_boolean create) 1805{ 1806 struct elfNN_ia64_dyn_sym_info **info_p, *info, *dyn_i, key; 1807 unsigned int *count_p, *sorted_count_p, *size_p; 1808 unsigned int count, sorted_count, size; 1809 bfd_vma addend = rel ? rel->r_addend : 0; 1810 bfd_size_type amt; 1811 1812 if (h) 1813 { 1814 struct elfNN_ia64_link_hash_entry *global_h; 1815 1816 global_h = (struct elfNN_ia64_link_hash_entry *) h; 1817 info_p = &global_h->info; 1818 count_p = &global_h->count; 1819 sorted_count_p = &global_h->sorted_count; 1820 size_p = &global_h->size; 1821 } 1822 else 1823 { 1824 struct elfNN_ia64_local_hash_entry *loc_h; 1825 1826 loc_h = get_local_sym_hash (ia64_info, abfd, rel, create); 1827 if (!loc_h) 1828 { 1829 BFD_ASSERT (!create); 1830 return NULL; 1831 } 1832 1833 info_p = &loc_h->info; 1834 count_p = &loc_h->count; 1835 sorted_count_p = &loc_h->sorted_count; 1836 size_p = &loc_h->size; 1837 } 1838 1839 count = *count_p; 1840 sorted_count = *sorted_count_p; 1841 size = *size_p; 1842 info = *info_p; 1843 if (create) 1844 { 1845 /* When we create the array, we don't check for duplicates, 1846 except in the previously sorted section if one exists, and 1847 against the last inserted entry. This allows insertions to 1848 be fast. */ 1849 if (info) 1850 { 1851 if (sorted_count) 1852 { 1853 /* Try bsearch first on the sorted section. */ 1854 key.addend = addend; 1855 dyn_i = bsearch (&key, info, sorted_count, 1856 sizeof (*info), addend_compare); 1857 1858 if (dyn_i) 1859 { 1860 return dyn_i; 1861 } 1862 } 1863 1864 /* Do a quick check for the last inserted entry. */ 1865 dyn_i = info + count - 1; 1866 if (dyn_i->addend == addend) 1867 { 1868 return dyn_i; 1869 } 1870 } 1871 1872 if (size == 0) 1873 { 1874 /* It is the very first element. We create the array of size 1875 1. */ 1876 size = 1; 1877 amt = size * sizeof (*info); 1878 info = bfd_malloc (amt); 1879 } 1880 else if (size <= count) 1881 { 1882 /* We double the array size every time when we reach the 1883 size limit. */ 1884 size += size; 1885 amt = size * sizeof (*info); 1886 info = bfd_realloc (info, amt); 1887 } 1888 else 1889 goto has_space; 1890 1891 if (info == NULL) 1892 return NULL; 1893 *size_p = size; 1894 *info_p = info; 1895 1896has_space: 1897 /* Append the new one to the array. */ 1898 dyn_i = info + count; 1899 memset (dyn_i, 0, sizeof (*dyn_i)); 1900 dyn_i->got_offset = (bfd_vma) -1; 1901 dyn_i->addend = addend; 1902 1903 /* We increment count only since the new ones are unsorted and 1904 may have duplicate. */ 1905 (*count_p)++; 1906 } 1907 else 1908 { 1909 /* It is a lookup without insertion. Sort array if part of the 1910 array isn't sorted. */ 1911 if (count != sorted_count) 1912 { 1913 count = sort_dyn_sym_info (info, count); 1914 *count_p = count; 1915 *sorted_count_p = count; 1916 } 1917 1918 /* Free unused memory. */ 1919 if (size != count) 1920 { 1921 amt = count * sizeof (*info); 1922 info = bfd_malloc (amt); 1923 if (info != NULL) 1924 { 1925 memcpy (info, *info_p, amt); 1926 free (*info_p); 1927 *size_p = count; 1928 *info_p = info; 1929 } 1930 } 1931 1932 key.addend = addend; 1933 dyn_i = bsearch (&key, info, count, 1934 sizeof (*info), addend_compare); 1935 } 1936 1937 return dyn_i; 1938} 1939 1940static asection * 1941get_got (bfd *abfd, struct bfd_link_info *info, 1942 struct elfNN_ia64_link_hash_table *ia64_info) 1943{ 1944 asection *got; 1945 bfd *dynobj; 1946 1947 got = ia64_info->root.sgot; 1948 if (!got) 1949 { 1950 flagword flags; 1951 1952 dynobj = ia64_info->root.dynobj; 1953 if (!dynobj) 1954 ia64_info->root.dynobj = dynobj = abfd; 1955 if (!_bfd_elf_create_got_section (dynobj, info)) 1956 return NULL; 1957 1958 got = ia64_info->root.sgot; 1959 1960 /* The .got section is always aligned at 8 bytes. */ 1961 if (!bfd_set_section_alignment (abfd, got, 3)) 1962 return NULL; 1963 1964 flags = bfd_get_section_flags (abfd, got); 1965 if (! bfd_set_section_flags (abfd, got, SEC_SMALL_DATA | flags)) 1966 return NULL; 1967 } 1968 1969 return got; 1970} 1971 1972/* Create function descriptor section (.opd). This section is called .opd 1973 because it contains "official procedure descriptors". The "official" 1974 refers to the fact that these descriptors are used when taking the address 1975 of a procedure, thus ensuring a unique address for each procedure. */ 1976 1977static asection * 1978get_fptr (bfd *abfd, struct bfd_link_info *info, 1979 struct elfNN_ia64_link_hash_table *ia64_info) 1980{ 1981 asection *fptr; 1982 bfd *dynobj; 1983 1984 fptr = ia64_info->fptr_sec; 1985 if (!fptr) 1986 { 1987 dynobj = ia64_info->root.dynobj; 1988 if (!dynobj) 1989 ia64_info->root.dynobj = dynobj = abfd; 1990 1991 fptr = bfd_make_section_anyway_with_flags (dynobj, ".opd", 1992 (SEC_ALLOC 1993 | SEC_LOAD 1994 | SEC_HAS_CONTENTS 1995 | SEC_IN_MEMORY 1996 | (bfd_link_pie (info) 1997 ? 0 : SEC_READONLY) 1998 | SEC_LINKER_CREATED)); 1999 if (!fptr 2000 || !bfd_set_section_alignment (abfd, fptr, 4)) 2001 { 2002 BFD_ASSERT (0); 2003 return NULL; 2004 } 2005 2006 ia64_info->fptr_sec = fptr; 2007 2008 if (bfd_link_pie (info)) 2009 { 2010 asection *fptr_rel; 2011 fptr_rel = bfd_make_section_anyway_with_flags (dynobj, ".rela.opd", 2012 (SEC_ALLOC | SEC_LOAD 2013 | SEC_HAS_CONTENTS 2014 | SEC_IN_MEMORY 2015 | SEC_LINKER_CREATED 2016 | SEC_READONLY)); 2017 if (fptr_rel == NULL 2018 || !bfd_set_section_alignment (abfd, fptr_rel, 2019 LOG_SECTION_ALIGN)) 2020 { 2021 BFD_ASSERT (0); 2022 return NULL; 2023 } 2024 2025 ia64_info->rel_fptr_sec = fptr_rel; 2026 } 2027 } 2028 2029 return fptr; 2030} 2031 2032static asection * 2033get_pltoff (bfd *abfd, struct bfd_link_info *info ATTRIBUTE_UNUSED, 2034 struct elfNN_ia64_link_hash_table *ia64_info) 2035{ 2036 asection *pltoff; 2037 bfd *dynobj; 2038 2039 pltoff = ia64_info->pltoff_sec; 2040 if (!pltoff) 2041 { 2042 dynobj = ia64_info->root.dynobj; 2043 if (!dynobj) 2044 ia64_info->root.dynobj = dynobj = abfd; 2045 2046 pltoff = bfd_make_section_anyway_with_flags (dynobj, 2047 ELF_STRING_ia64_pltoff, 2048 (SEC_ALLOC 2049 | SEC_LOAD 2050 | SEC_HAS_CONTENTS 2051 | SEC_IN_MEMORY 2052 | SEC_SMALL_DATA 2053 | SEC_LINKER_CREATED)); 2054 if (!pltoff 2055 || !bfd_set_section_alignment (abfd, pltoff, 4)) 2056 { 2057 BFD_ASSERT (0); 2058 return NULL; 2059 } 2060 2061 ia64_info->pltoff_sec = pltoff; 2062 } 2063 2064 return pltoff; 2065} 2066 2067static asection * 2068get_reloc_section (bfd *abfd, 2069 struct elfNN_ia64_link_hash_table *ia64_info, 2070 asection *sec, bfd_boolean create) 2071{ 2072 const char *srel_name; 2073 asection *srel; 2074 bfd *dynobj; 2075 2076 srel_name = (bfd_elf_string_from_elf_section 2077 (abfd, elf_elfheader(abfd)->e_shstrndx, 2078 _bfd_elf_single_rel_hdr (sec)->sh_name)); 2079 if (srel_name == NULL) 2080 return NULL; 2081 2082 dynobj = ia64_info->root.dynobj; 2083 if (!dynobj) 2084 ia64_info->root.dynobj = dynobj = abfd; 2085 2086 srel = bfd_get_linker_section (dynobj, srel_name); 2087 if (srel == NULL && create) 2088 { 2089 srel = bfd_make_section_anyway_with_flags (dynobj, srel_name, 2090 (SEC_ALLOC | SEC_LOAD 2091 | SEC_HAS_CONTENTS 2092 | SEC_IN_MEMORY 2093 | SEC_LINKER_CREATED 2094 | SEC_READONLY)); 2095 if (srel == NULL 2096 || !bfd_set_section_alignment (dynobj, srel, 2097 LOG_SECTION_ALIGN)) 2098 return NULL; 2099 } 2100 2101 return srel; 2102} 2103 2104static bfd_boolean 2105count_dyn_reloc (bfd *abfd, struct elfNN_ia64_dyn_sym_info *dyn_i, 2106 asection *srel, int type, bfd_boolean reltext) 2107{ 2108 struct elfNN_ia64_dyn_reloc_entry *rent; 2109 2110 for (rent = dyn_i->reloc_entries; rent; rent = rent->next) 2111 if (rent->srel == srel && rent->type == type) 2112 break; 2113 2114 if (!rent) 2115 { 2116 rent = ((struct elfNN_ia64_dyn_reloc_entry *) 2117 bfd_alloc (abfd, (bfd_size_type) sizeof (*rent))); 2118 if (!rent) 2119 return FALSE; 2120 2121 rent->next = dyn_i->reloc_entries; 2122 rent->srel = srel; 2123 rent->type = type; 2124 rent->count = 0; 2125 dyn_i->reloc_entries = rent; 2126 } 2127 rent->reltext = reltext; 2128 rent->count++; 2129 2130 return TRUE; 2131} 2132 2133static bfd_boolean 2134elfNN_ia64_check_relocs (bfd *abfd, struct bfd_link_info *info, 2135 asection *sec, 2136 const Elf_Internal_Rela *relocs) 2137{ 2138 struct elfNN_ia64_link_hash_table *ia64_info; 2139 const Elf_Internal_Rela *relend; 2140 Elf_Internal_Shdr *symtab_hdr; 2141 const Elf_Internal_Rela *rel; 2142 asection *got, *fptr, *srel, *pltoff; 2143 enum { 2144 NEED_GOT = 1, 2145 NEED_GOTX = 2, 2146 NEED_FPTR = 4, 2147 NEED_PLTOFF = 8, 2148 NEED_MIN_PLT = 16, 2149 NEED_FULL_PLT = 32, 2150 NEED_DYNREL = 64, 2151 NEED_LTOFF_FPTR = 128, 2152 NEED_TPREL = 256, 2153 NEED_DTPMOD = 512, 2154 NEED_DTPREL = 1024 2155 }; 2156 int need_entry; 2157 struct elf_link_hash_entry *h; 2158 unsigned long r_symndx; 2159 bfd_boolean maybe_dynamic; 2160 2161 if (bfd_link_relocatable (info)) 2162 return TRUE; 2163 2164 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 2165 ia64_info = elfNN_ia64_hash_table (info); 2166 if (ia64_info == NULL) 2167 return FALSE; 2168 2169 got = fptr = srel = pltoff = NULL; 2170 2171 relend = relocs + sec->reloc_count; 2172 2173 /* We scan relocations first to create dynamic relocation arrays. We 2174 modified get_dyn_sym_info to allow fast insertion and support fast 2175 lookup in the next loop. */ 2176 for (rel = relocs; rel < relend; ++rel) 2177 { 2178 r_symndx = ELFNN_R_SYM (rel->r_info); 2179 if (r_symndx >= symtab_hdr->sh_info) 2180 { 2181 long indx = r_symndx - symtab_hdr->sh_info; 2182 h = elf_sym_hashes (abfd)[indx]; 2183 while (h->root.type == bfd_link_hash_indirect 2184 || h->root.type == bfd_link_hash_warning) 2185 h = (struct elf_link_hash_entry *) h->root.u.i.link; 2186 } 2187 else 2188 h = NULL; 2189 2190 /* We can only get preliminary data on whether a symbol is 2191 locally or externally defined, as not all of the input files 2192 have yet been processed. Do something with what we know, as 2193 this may help reduce memory usage and processing time later. */ 2194 maybe_dynamic = (h && ((!bfd_link_executable (info) 2195 && (!SYMBOLIC_BIND (info, h) 2196 || info->unresolved_syms_in_shared_libs == RM_IGNORE)) 2197 || !h->def_regular 2198 || h->root.type == bfd_link_hash_defweak)); 2199 2200 need_entry = 0; 2201 switch (ELFNN_R_TYPE (rel->r_info)) 2202 { 2203 case R_IA64_TPREL64MSB: 2204 case R_IA64_TPREL64LSB: 2205 if (bfd_link_pic (info) || maybe_dynamic) 2206 need_entry = NEED_DYNREL; 2207 break; 2208 2209 case R_IA64_LTOFF_TPREL22: 2210 need_entry = NEED_TPREL; 2211 if (bfd_link_pic (info)) 2212 info->flags |= DF_STATIC_TLS; 2213 break; 2214 2215 case R_IA64_DTPREL32MSB: 2216 case R_IA64_DTPREL32LSB: 2217 case R_IA64_DTPREL64MSB: 2218 case R_IA64_DTPREL64LSB: 2219 if (bfd_link_pic (info) || maybe_dynamic) 2220 need_entry = NEED_DYNREL; 2221 break; 2222 2223 case R_IA64_LTOFF_DTPREL22: 2224 need_entry = NEED_DTPREL; 2225 break; 2226 2227 case R_IA64_DTPMOD64MSB: 2228 case R_IA64_DTPMOD64LSB: 2229 if (bfd_link_pic (info) || maybe_dynamic) 2230 need_entry = NEED_DYNREL; 2231 break; 2232 2233 case R_IA64_LTOFF_DTPMOD22: 2234 need_entry = NEED_DTPMOD; 2235 break; 2236 2237 case R_IA64_LTOFF_FPTR22: 2238 case R_IA64_LTOFF_FPTR64I: 2239 case R_IA64_LTOFF_FPTR32MSB: 2240 case R_IA64_LTOFF_FPTR32LSB: 2241 case R_IA64_LTOFF_FPTR64MSB: 2242 case R_IA64_LTOFF_FPTR64LSB: 2243 need_entry = NEED_FPTR | NEED_GOT | NEED_LTOFF_FPTR; 2244 break; 2245 2246 case R_IA64_FPTR64I: 2247 case R_IA64_FPTR32MSB: 2248 case R_IA64_FPTR32LSB: 2249 case R_IA64_FPTR64MSB: 2250 case R_IA64_FPTR64LSB: 2251 if (bfd_link_pic (info) || h) 2252 need_entry = NEED_FPTR | NEED_DYNREL; 2253 else 2254 need_entry = NEED_FPTR; 2255 break; 2256 2257 case R_IA64_LTOFF22: 2258 case R_IA64_LTOFF64I: 2259 need_entry = NEED_GOT; 2260 break; 2261 2262 case R_IA64_LTOFF22X: 2263 need_entry = NEED_GOTX; 2264 break; 2265 2266 case R_IA64_PLTOFF22: 2267 case R_IA64_PLTOFF64I: 2268 case R_IA64_PLTOFF64MSB: 2269 case R_IA64_PLTOFF64LSB: 2270 need_entry = NEED_PLTOFF; 2271 if (h) 2272 { 2273 if (maybe_dynamic) 2274 need_entry |= NEED_MIN_PLT; 2275 } 2276 else 2277 { 2278 (*info->callbacks->warning) 2279 (info, _("@pltoff reloc against local symbol"), 0, 2280 abfd, 0, (bfd_vma) 0); 2281 } 2282 break; 2283 2284 case R_IA64_PCREL21B: 2285 case R_IA64_PCREL60B: 2286 /* Depending on where this symbol is defined, we may or may not 2287 need a full plt entry. Only skip if we know we'll not need 2288 the entry -- static or symbolic, and the symbol definition 2289 has already been seen. */ 2290 if (maybe_dynamic && rel->r_addend == 0) 2291 need_entry = NEED_FULL_PLT; 2292 break; 2293 2294 case R_IA64_IMM14: 2295 case R_IA64_IMM22: 2296 case R_IA64_IMM64: 2297 case R_IA64_DIR32MSB: 2298 case R_IA64_DIR32LSB: 2299 case R_IA64_DIR64MSB: 2300 case R_IA64_DIR64LSB: 2301 /* Shared objects will always need at least a REL relocation. */ 2302 if (bfd_link_pic (info) || maybe_dynamic) 2303 need_entry = NEED_DYNREL; 2304 break; 2305 2306 case R_IA64_IPLTMSB: 2307 case R_IA64_IPLTLSB: 2308 /* Shared objects will always need at least a REL relocation. */ 2309 if (bfd_link_pic (info) || maybe_dynamic) 2310 need_entry = NEED_DYNREL; 2311 break; 2312 2313 case R_IA64_PCREL22: 2314 case R_IA64_PCREL64I: 2315 case R_IA64_PCREL32MSB: 2316 case R_IA64_PCREL32LSB: 2317 case R_IA64_PCREL64MSB: 2318 case R_IA64_PCREL64LSB: 2319 if (maybe_dynamic) 2320 need_entry = NEED_DYNREL; 2321 break; 2322 } 2323 2324 if (!need_entry) 2325 continue; 2326 2327 if ((need_entry & NEED_FPTR) != 0 2328 && rel->r_addend) 2329 { 2330 (*info->callbacks->warning) 2331 (info, _("non-zero addend in @fptr reloc"), 0, 2332 abfd, 0, (bfd_vma) 0); 2333 } 2334 2335 if (get_dyn_sym_info (ia64_info, h, abfd, rel, TRUE) == NULL) 2336 return FALSE; 2337 } 2338 2339 /* Now, we only do lookup without insertion, which is very fast 2340 with the modified get_dyn_sym_info. */ 2341 for (rel = relocs; rel < relend; ++rel) 2342 { 2343 struct elfNN_ia64_dyn_sym_info *dyn_i; 2344 int dynrel_type = R_IA64_NONE; 2345 2346 r_symndx = ELFNN_R_SYM (rel->r_info); 2347 if (r_symndx >= symtab_hdr->sh_info) 2348 { 2349 /* We're dealing with a global symbol -- find its hash entry 2350 and mark it as being referenced. */ 2351 long indx = r_symndx - symtab_hdr->sh_info; 2352 h = elf_sym_hashes (abfd)[indx]; 2353 while (h->root.type == bfd_link_hash_indirect 2354 || h->root.type == bfd_link_hash_warning) 2355 h = (struct elf_link_hash_entry *) h->root.u.i.link; 2356 2357 /* PR15323, ref flags aren't set for references in the same 2358 object. */ 2359 h->root.non_ir_ref = 1; 2360 h->ref_regular = 1; 2361 } 2362 else 2363 h = NULL; 2364 2365 /* We can only get preliminary data on whether a symbol is 2366 locally or externally defined, as not all of the input files 2367 have yet been processed. Do something with what we know, as 2368 this may help reduce memory usage and processing time later. */ 2369 maybe_dynamic = (h && ((!bfd_link_executable (info) 2370 && (!SYMBOLIC_BIND (info, h) 2371 || info->unresolved_syms_in_shared_libs == RM_IGNORE)) 2372 || !h->def_regular 2373 || h->root.type == bfd_link_hash_defweak)); 2374 2375 need_entry = 0; 2376 switch (ELFNN_R_TYPE (rel->r_info)) 2377 { 2378 case R_IA64_TPREL64MSB: 2379 case R_IA64_TPREL64LSB: 2380 if (bfd_link_pic (info) || maybe_dynamic) 2381 need_entry = NEED_DYNREL; 2382 dynrel_type = R_IA64_TPREL64LSB; 2383 if (bfd_link_pic (info)) 2384 info->flags |= DF_STATIC_TLS; 2385 break; 2386 2387 case R_IA64_LTOFF_TPREL22: 2388 need_entry = NEED_TPREL; 2389 if (bfd_link_pic (info)) 2390 info->flags |= DF_STATIC_TLS; 2391 break; 2392 2393 case R_IA64_DTPREL32MSB: 2394 case R_IA64_DTPREL32LSB: 2395 case R_IA64_DTPREL64MSB: 2396 case R_IA64_DTPREL64LSB: 2397 if (bfd_link_pic (info) || maybe_dynamic) 2398 need_entry = NEED_DYNREL; 2399 dynrel_type = R_IA64_DTPRELNNLSB; 2400 break; 2401 2402 case R_IA64_LTOFF_DTPREL22: 2403 need_entry = NEED_DTPREL; 2404 break; 2405 2406 case R_IA64_DTPMOD64MSB: 2407 case R_IA64_DTPMOD64LSB: 2408 if (bfd_link_pic (info) || maybe_dynamic) 2409 need_entry = NEED_DYNREL; 2410 dynrel_type = R_IA64_DTPMOD64LSB; 2411 break; 2412 2413 case R_IA64_LTOFF_DTPMOD22: 2414 need_entry = NEED_DTPMOD; 2415 break; 2416 2417 case R_IA64_LTOFF_FPTR22: 2418 case R_IA64_LTOFF_FPTR64I: 2419 case R_IA64_LTOFF_FPTR32MSB: 2420 case R_IA64_LTOFF_FPTR32LSB: 2421 case R_IA64_LTOFF_FPTR64MSB: 2422 case R_IA64_LTOFF_FPTR64LSB: 2423 need_entry = NEED_FPTR | NEED_GOT | NEED_LTOFF_FPTR; 2424 break; 2425 2426 case R_IA64_FPTR64I: 2427 case R_IA64_FPTR32MSB: 2428 case R_IA64_FPTR32LSB: 2429 case R_IA64_FPTR64MSB: 2430 case R_IA64_FPTR64LSB: 2431 if (bfd_link_pic (info) || h) 2432 need_entry = NEED_FPTR | NEED_DYNREL; 2433 else 2434 need_entry = NEED_FPTR; 2435 dynrel_type = R_IA64_FPTRNNLSB; 2436 break; 2437 2438 case R_IA64_LTOFF22: 2439 case R_IA64_LTOFF64I: 2440 need_entry = NEED_GOT; 2441 break; 2442 2443 case R_IA64_LTOFF22X: 2444 need_entry = NEED_GOTX; 2445 break; 2446 2447 case R_IA64_PLTOFF22: 2448 case R_IA64_PLTOFF64I: 2449 case R_IA64_PLTOFF64MSB: 2450 case R_IA64_PLTOFF64LSB: 2451 need_entry = NEED_PLTOFF; 2452 if (h) 2453 { 2454 if (maybe_dynamic) 2455 need_entry |= NEED_MIN_PLT; 2456 } 2457 break; 2458 2459 case R_IA64_PCREL21B: 2460 case R_IA64_PCREL60B: 2461 /* Depending on where this symbol is defined, we may or may not 2462 need a full plt entry. Only skip if we know we'll not need 2463 the entry -- static or symbolic, and the symbol definition 2464 has already been seen. */ 2465 if (maybe_dynamic && rel->r_addend == 0) 2466 need_entry = NEED_FULL_PLT; 2467 break; 2468 2469 case R_IA64_IMM14: 2470 case R_IA64_IMM22: 2471 case R_IA64_IMM64: 2472 case R_IA64_DIR32MSB: 2473 case R_IA64_DIR32LSB: 2474 case R_IA64_DIR64MSB: 2475 case R_IA64_DIR64LSB: 2476 /* Shared objects will always need at least a REL relocation. */ 2477 if (bfd_link_pic (info) || maybe_dynamic) 2478 need_entry = NEED_DYNREL; 2479 dynrel_type = R_IA64_DIRNNLSB; 2480 break; 2481 2482 case R_IA64_IPLTMSB: 2483 case R_IA64_IPLTLSB: 2484 /* Shared objects will always need at least a REL relocation. */ 2485 if (bfd_link_pic (info) || maybe_dynamic) 2486 need_entry = NEED_DYNREL; 2487 dynrel_type = R_IA64_IPLTLSB; 2488 break; 2489 2490 case R_IA64_PCREL22: 2491 case R_IA64_PCREL64I: 2492 case R_IA64_PCREL32MSB: 2493 case R_IA64_PCREL32LSB: 2494 case R_IA64_PCREL64MSB: 2495 case R_IA64_PCREL64LSB: 2496 if (maybe_dynamic) 2497 need_entry = NEED_DYNREL; 2498 dynrel_type = R_IA64_PCRELNNLSB; 2499 break; 2500 } 2501 2502 if (!need_entry) 2503 continue; 2504 2505 dyn_i = get_dyn_sym_info (ia64_info, h, abfd, rel, FALSE); 2506 2507 /* Record whether or not this is a local symbol. */ 2508 dyn_i->h = h; 2509 2510 /* Create what's needed. */ 2511 if (need_entry & (NEED_GOT | NEED_GOTX | NEED_TPREL 2512 | NEED_DTPMOD | NEED_DTPREL)) 2513 { 2514 if (!got) 2515 { 2516 got = get_got (abfd, info, ia64_info); 2517 if (!got) 2518 return FALSE; 2519 } 2520 if (need_entry & NEED_GOT) 2521 dyn_i->want_got = 1; 2522 if (need_entry & NEED_GOTX) 2523 dyn_i->want_gotx = 1; 2524 if (need_entry & NEED_TPREL) 2525 dyn_i->want_tprel = 1; 2526 if (need_entry & NEED_DTPMOD) 2527 dyn_i->want_dtpmod = 1; 2528 if (need_entry & NEED_DTPREL) 2529 dyn_i->want_dtprel = 1; 2530 } 2531 if (need_entry & NEED_FPTR) 2532 { 2533 if (!fptr) 2534 { 2535 fptr = get_fptr (abfd, info, ia64_info); 2536 if (!fptr) 2537 return FALSE; 2538 } 2539 2540 /* FPTRs for shared libraries are allocated by the dynamic 2541 linker. Make sure this local symbol will appear in the 2542 dynamic symbol table. */ 2543 if (!h && bfd_link_pic (info)) 2544 { 2545 if (! (bfd_elf_link_record_local_dynamic_symbol 2546 (info, abfd, (long) r_symndx))) 2547 return FALSE; 2548 } 2549 2550 dyn_i->want_fptr = 1; 2551 } 2552 if (need_entry & NEED_LTOFF_FPTR) 2553 dyn_i->want_ltoff_fptr = 1; 2554 if (need_entry & (NEED_MIN_PLT | NEED_FULL_PLT)) 2555 { 2556 if (!ia64_info->root.dynobj) 2557 ia64_info->root.dynobj = abfd; 2558 h->needs_plt = 1; 2559 dyn_i->want_plt = 1; 2560 } 2561 if (need_entry & NEED_FULL_PLT) 2562 dyn_i->want_plt2 = 1; 2563 if (need_entry & NEED_PLTOFF) 2564 { 2565 /* This is needed here, in case @pltoff is used in a non-shared 2566 link. */ 2567 if (!pltoff) 2568 { 2569 pltoff = get_pltoff (abfd, info, ia64_info); 2570 if (!pltoff) 2571 return FALSE; 2572 } 2573 2574 dyn_i->want_pltoff = 1; 2575 } 2576 if ((need_entry & NEED_DYNREL) && (sec->flags & SEC_ALLOC)) 2577 { 2578 if (!srel) 2579 { 2580 srel = get_reloc_section (abfd, ia64_info, sec, TRUE); 2581 if (!srel) 2582 return FALSE; 2583 } 2584 if (!count_dyn_reloc (abfd, dyn_i, srel, dynrel_type, 2585 (sec->flags & SEC_READONLY) != 0)) 2586 return FALSE; 2587 } 2588 } 2589 2590 return TRUE; 2591} 2592 2593/* For cleanliness, and potentially faster dynamic loading, allocate 2594 external GOT entries first. */ 2595 2596static bfd_boolean 2597allocate_global_data_got (struct elfNN_ia64_dyn_sym_info *dyn_i, 2598 void * data) 2599{ 2600 struct elfNN_ia64_allocate_data *x = (struct elfNN_ia64_allocate_data *)data; 2601 2602 if ((dyn_i->want_got || dyn_i->want_gotx) 2603 && ! dyn_i->want_fptr 2604 && elfNN_ia64_dynamic_symbol_p (dyn_i->h, x->info, 0)) 2605 { 2606 dyn_i->got_offset = x->ofs; 2607 x->ofs += 8; 2608 } 2609 if (dyn_i->want_tprel) 2610 { 2611 dyn_i->tprel_offset = x->ofs; 2612 x->ofs += 8; 2613 } 2614 if (dyn_i->want_dtpmod) 2615 { 2616 if (elfNN_ia64_dynamic_symbol_p (dyn_i->h, x->info, 0)) 2617 { 2618 dyn_i->dtpmod_offset = x->ofs; 2619 x->ofs += 8; 2620 } 2621 else 2622 { 2623 struct elfNN_ia64_link_hash_table *ia64_info; 2624 2625 ia64_info = elfNN_ia64_hash_table (x->info); 2626 if (ia64_info == NULL) 2627 return FALSE; 2628 2629 if (ia64_info->self_dtpmod_offset == (bfd_vma) -1) 2630 { 2631 ia64_info->self_dtpmod_offset = x->ofs; 2632 x->ofs += 8; 2633 } 2634 dyn_i->dtpmod_offset = ia64_info->self_dtpmod_offset; 2635 } 2636 } 2637 if (dyn_i->want_dtprel) 2638 { 2639 dyn_i->dtprel_offset = x->ofs; 2640 x->ofs += 8; 2641 } 2642 return TRUE; 2643} 2644 2645/* Next, allocate all the GOT entries used by LTOFF_FPTR relocs. */ 2646 2647static bfd_boolean 2648allocate_global_fptr_got (struct elfNN_ia64_dyn_sym_info *dyn_i, 2649 void * data) 2650{ 2651 struct elfNN_ia64_allocate_data *x = (struct elfNN_ia64_allocate_data *)data; 2652 2653 if (dyn_i->want_got 2654 && dyn_i->want_fptr 2655 && elfNN_ia64_dynamic_symbol_p (dyn_i->h, x->info, R_IA64_FPTRNNLSB)) 2656 { 2657 dyn_i->got_offset = x->ofs; 2658 x->ofs += 8; 2659 } 2660 return TRUE; 2661} 2662 2663/* Lastly, allocate all the GOT entries for local data. */ 2664 2665static bfd_boolean 2666allocate_local_got (struct elfNN_ia64_dyn_sym_info *dyn_i, 2667 void * data) 2668{ 2669 struct elfNN_ia64_allocate_data *x = (struct elfNN_ia64_allocate_data *)data; 2670 2671 if ((dyn_i->want_got || dyn_i->want_gotx) 2672 && !elfNN_ia64_dynamic_symbol_p (dyn_i->h, x->info, 0)) 2673 { 2674 dyn_i->got_offset = x->ofs; 2675 x->ofs += 8; 2676 } 2677 return TRUE; 2678} 2679 2680/* Search for the index of a global symbol in it's defining object file. */ 2681 2682static long 2683global_sym_index (struct elf_link_hash_entry *h) 2684{ 2685 struct elf_link_hash_entry **p; 2686 bfd *obj; 2687 2688 BFD_ASSERT (h->root.type == bfd_link_hash_defined 2689 || h->root.type == bfd_link_hash_defweak); 2690 2691 obj = h->root.u.def.section->owner; 2692 for (p = elf_sym_hashes (obj); *p != h; ++p) 2693 continue; 2694 2695 return p - elf_sym_hashes (obj) + elf_tdata (obj)->symtab_hdr.sh_info; 2696} 2697 2698/* Allocate function descriptors. We can do these for every function 2699 in a main executable that is not exported. */ 2700 2701static bfd_boolean 2702allocate_fptr (struct elfNN_ia64_dyn_sym_info *dyn_i, void * data) 2703{ 2704 struct elfNN_ia64_allocate_data *x = (struct elfNN_ia64_allocate_data *)data; 2705 2706 if (dyn_i->want_fptr) 2707 { 2708 struct elf_link_hash_entry *h = dyn_i->h; 2709 2710 if (h) 2711 while (h->root.type == bfd_link_hash_indirect 2712 || h->root.type == bfd_link_hash_warning) 2713 h = (struct elf_link_hash_entry *) h->root.u.i.link; 2714 2715 if (!bfd_link_executable (x->info) 2716 && (!h 2717 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 2718 || (h->root.type != bfd_link_hash_undefweak 2719 && h->root.type != bfd_link_hash_undefined))) 2720 { 2721 if (h && h->dynindx == -1) 2722 { 2723 BFD_ASSERT ((h->root.type == bfd_link_hash_defined) 2724 || (h->root.type == bfd_link_hash_defweak)); 2725 2726 if (!bfd_elf_link_record_local_dynamic_symbol 2727 (x->info, h->root.u.def.section->owner, 2728 global_sym_index (h))) 2729 return FALSE; 2730 } 2731 2732 dyn_i->want_fptr = 0; 2733 } 2734 else if (h == NULL || h->dynindx == -1) 2735 { 2736 dyn_i->fptr_offset = x->ofs; 2737 x->ofs += 16; 2738 } 2739 else 2740 dyn_i->want_fptr = 0; 2741 } 2742 return TRUE; 2743} 2744 2745/* Allocate all the minimal PLT entries. */ 2746 2747static bfd_boolean 2748allocate_plt_entries (struct elfNN_ia64_dyn_sym_info *dyn_i, 2749 void * data) 2750{ 2751 struct elfNN_ia64_allocate_data *x = (struct elfNN_ia64_allocate_data *)data; 2752 2753 if (dyn_i->want_plt) 2754 { 2755 struct elf_link_hash_entry *h = dyn_i->h; 2756 2757 if (h) 2758 while (h->root.type == bfd_link_hash_indirect 2759 || h->root.type == bfd_link_hash_warning) 2760 h = (struct elf_link_hash_entry *) h->root.u.i.link; 2761 2762 /* ??? Versioned symbols seem to lose NEEDS_PLT. */ 2763 if (elfNN_ia64_dynamic_symbol_p (h, x->info, 0)) 2764 { 2765 bfd_size_type offset = x->ofs; 2766 if (offset == 0) 2767 offset = PLT_HEADER_SIZE; 2768 dyn_i->plt_offset = offset; 2769 x->ofs = offset + PLT_MIN_ENTRY_SIZE; 2770 2771 dyn_i->want_pltoff = 1; 2772 } 2773 else 2774 { 2775 dyn_i->want_plt = 0; 2776 dyn_i->want_plt2 = 0; 2777 } 2778 } 2779 return TRUE; 2780} 2781 2782/* Allocate all the full PLT entries. */ 2783 2784static bfd_boolean 2785allocate_plt2_entries (struct elfNN_ia64_dyn_sym_info *dyn_i, 2786 void * data) 2787{ 2788 struct elfNN_ia64_allocate_data *x = (struct elfNN_ia64_allocate_data *)data; 2789 2790 if (dyn_i->want_plt2) 2791 { 2792 struct elf_link_hash_entry *h = dyn_i->h; 2793 bfd_size_type ofs = x->ofs; 2794 2795 dyn_i->plt2_offset = ofs; 2796 x->ofs = ofs + PLT_FULL_ENTRY_SIZE; 2797 2798 while (h->root.type == bfd_link_hash_indirect 2799 || h->root.type == bfd_link_hash_warning) 2800 h = (struct elf_link_hash_entry *) h->root.u.i.link; 2801 dyn_i->h->plt.offset = ofs; 2802 } 2803 return TRUE; 2804} 2805 2806/* Allocate all the PLTOFF entries requested by relocations and 2807 plt entries. We can't share space with allocated FPTR entries, 2808 because the latter are not necessarily addressable by the GP. 2809 ??? Relaxation might be able to determine that they are. */ 2810 2811static bfd_boolean 2812allocate_pltoff_entries (struct elfNN_ia64_dyn_sym_info *dyn_i, 2813 void * data) 2814{ 2815 struct elfNN_ia64_allocate_data *x = (struct elfNN_ia64_allocate_data *)data; 2816 2817 if (dyn_i->want_pltoff) 2818 { 2819 dyn_i->pltoff_offset = x->ofs; 2820 x->ofs += 16; 2821 } 2822 return TRUE; 2823} 2824 2825/* Allocate dynamic relocations for those symbols that turned out 2826 to be dynamic. */ 2827 2828static bfd_boolean 2829allocate_dynrel_entries (struct elfNN_ia64_dyn_sym_info *dyn_i, 2830 void * data) 2831{ 2832 struct elfNN_ia64_allocate_data *x = (struct elfNN_ia64_allocate_data *)data; 2833 struct elfNN_ia64_link_hash_table *ia64_info; 2834 struct elfNN_ia64_dyn_reloc_entry *rent; 2835 bfd_boolean dynamic_symbol, shared, resolved_zero; 2836 2837 ia64_info = elfNN_ia64_hash_table (x->info); 2838 if (ia64_info == NULL) 2839 return FALSE; 2840 2841 /* Note that this can't be used in relation to FPTR relocs below. */ 2842 dynamic_symbol = elfNN_ia64_dynamic_symbol_p (dyn_i->h, x->info, 0); 2843 2844 shared = bfd_link_pic (x->info); 2845 resolved_zero = (dyn_i->h 2846 && ELF_ST_VISIBILITY (dyn_i->h->other) 2847 && dyn_i->h->root.type == bfd_link_hash_undefweak); 2848 2849 /* Take care of the GOT and PLT relocations. */ 2850 2851 if ((!resolved_zero 2852 && (dynamic_symbol || shared) 2853 && (dyn_i->want_got || dyn_i->want_gotx)) 2854 || (dyn_i->want_ltoff_fptr 2855 && dyn_i->h 2856 && dyn_i->h->dynindx != -1)) 2857 { 2858 if (!dyn_i->want_ltoff_fptr 2859 || !bfd_link_pie (x->info) 2860 || dyn_i->h == NULL 2861 || dyn_i->h->root.type != bfd_link_hash_undefweak) 2862 ia64_info->root.srelgot->size += sizeof (ElfNN_External_Rela); 2863 } 2864 if ((dynamic_symbol || shared) && dyn_i->want_tprel) 2865 ia64_info->root.srelgot->size += sizeof (ElfNN_External_Rela); 2866 if (dynamic_symbol && dyn_i->want_dtpmod) 2867 ia64_info->root.srelgot->size += sizeof (ElfNN_External_Rela); 2868 if (dynamic_symbol && dyn_i->want_dtprel) 2869 ia64_info->root.srelgot->size += sizeof (ElfNN_External_Rela); 2870 2871 if (x->only_got) 2872 return TRUE; 2873 2874 if (ia64_info->rel_fptr_sec && dyn_i->want_fptr) 2875 { 2876 if (dyn_i->h == NULL || dyn_i->h->root.type != bfd_link_hash_undefweak) 2877 ia64_info->rel_fptr_sec->size += sizeof (ElfNN_External_Rela); 2878 } 2879 2880 if (!resolved_zero && dyn_i->want_pltoff) 2881 { 2882 bfd_size_type t = 0; 2883 2884 /* Dynamic symbols get one IPLT relocation. Local symbols in 2885 shared libraries get two REL relocations. Local symbols in 2886 main applications get nothing. */ 2887 if (dynamic_symbol) 2888 t = sizeof (ElfNN_External_Rela); 2889 else if (shared) 2890 t = 2 * sizeof (ElfNN_External_Rela); 2891 2892 ia64_info->rel_pltoff_sec->size += t; 2893 } 2894 2895 /* Take care of the normal data relocations. */ 2896 2897 for (rent = dyn_i->reloc_entries; rent; rent = rent->next) 2898 { 2899 int count = rent->count; 2900 2901 switch (rent->type) 2902 { 2903 case R_IA64_FPTR32LSB: 2904 case R_IA64_FPTR64LSB: 2905 /* Allocate one iff !want_fptr and not PIE, which by this point 2906 will be true only if we're actually allocating one statically 2907 in the main executable. Position independent executables 2908 need a relative reloc. */ 2909 if (dyn_i->want_fptr && !bfd_link_pie (x->info)) 2910 continue; 2911 break; 2912 case R_IA64_PCREL32LSB: 2913 case R_IA64_PCREL64LSB: 2914 if (!dynamic_symbol) 2915 continue; 2916 break; 2917 case R_IA64_DIR32LSB: 2918 case R_IA64_DIR64LSB: 2919 if (!dynamic_symbol && !shared) 2920 continue; 2921 break; 2922 case R_IA64_IPLTLSB: 2923 if (!dynamic_symbol && !shared) 2924 continue; 2925 /* Use two REL relocations for IPLT relocations 2926 against local symbols. */ 2927 if (!dynamic_symbol) 2928 count *= 2; 2929 break; 2930 case R_IA64_DTPREL32LSB: 2931 case R_IA64_TPREL64LSB: 2932 case R_IA64_DTPREL64LSB: 2933 case R_IA64_DTPMOD64LSB: 2934 break; 2935 default: 2936 abort (); 2937 } 2938 if (rent->reltext) 2939 ia64_info->reltext = 1; 2940 rent->srel->size += sizeof (ElfNN_External_Rela) * count; 2941 } 2942 2943 return TRUE; 2944} 2945 2946static bfd_boolean 2947elfNN_ia64_adjust_dynamic_symbol (struct bfd_link_info *info ATTRIBUTE_UNUSED, 2948 struct elf_link_hash_entry *h) 2949{ 2950 /* ??? Undefined symbols with PLT entries should be re-defined 2951 to be the PLT entry. */ 2952 2953 /* If this is a weak symbol, and there is a real definition, the 2954 processor independent code will have arranged for us to see the 2955 real definition first, and we can just use the same value. */ 2956 if (h->u.weakdef != NULL) 2957 { 2958 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined 2959 || h->u.weakdef->root.type == bfd_link_hash_defweak); 2960 h->root.u.def.section = h->u.weakdef->root.u.def.section; 2961 h->root.u.def.value = h->u.weakdef->root.u.def.value; 2962 return TRUE; 2963 } 2964 2965 /* If this is a reference to a symbol defined by a dynamic object which 2966 is not a function, we might allocate the symbol in our .dynbss section 2967 and allocate a COPY dynamic relocation. 2968 2969 But IA-64 code is canonically PIC, so as a rule we can avoid this sort 2970 of hackery. */ 2971 2972 return TRUE; 2973} 2974 2975static bfd_boolean 2976elfNN_ia64_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, 2977 struct bfd_link_info *info) 2978{ 2979 struct elfNN_ia64_allocate_data data; 2980 struct elfNN_ia64_link_hash_table *ia64_info; 2981 asection *sec; 2982 bfd *dynobj; 2983 bfd_boolean relplt = FALSE; 2984 2985 dynobj = elf_hash_table(info)->dynobj; 2986 ia64_info = elfNN_ia64_hash_table (info); 2987 if (ia64_info == NULL) 2988 return FALSE; 2989 ia64_info->self_dtpmod_offset = (bfd_vma) -1; 2990 BFD_ASSERT(dynobj != NULL); 2991 data.info = info; 2992 2993 /* Set the contents of the .interp section to the interpreter. */ 2994 if (ia64_info->root.dynamic_sections_created 2995 && bfd_link_executable (info) && !info->nointerp) 2996 { 2997 sec = bfd_get_linker_section (dynobj, ".interp"); 2998 BFD_ASSERT (sec != NULL); 2999 sec->contents = (bfd_byte *) ELF_DYNAMIC_INTERPRETER; 3000 sec->size = strlen (ELF_DYNAMIC_INTERPRETER) + 1; 3001 } 3002 3003 /* Allocate the GOT entries. */ 3004 3005 if (ia64_info->root.sgot) 3006 { 3007 data.ofs = 0; 3008 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_global_data_got, &data); 3009 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_global_fptr_got, &data); 3010 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_local_got, &data); 3011 ia64_info->root.sgot->size = data.ofs; 3012 } 3013 3014 /* Allocate the FPTR entries. */ 3015 3016 if (ia64_info->fptr_sec) 3017 { 3018 data.ofs = 0; 3019 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_fptr, &data); 3020 ia64_info->fptr_sec->size = data.ofs; 3021 } 3022 3023 /* Now that we've seen all of the input files, we can decide which 3024 symbols need plt entries. Allocate the minimal PLT entries first. 3025 We do this even though dynamic_sections_created may be FALSE, because 3026 this has the side-effect of clearing want_plt and want_plt2. */ 3027 3028 data.ofs = 0; 3029 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_plt_entries, &data); 3030 3031 ia64_info->minplt_entries = 0; 3032 if (data.ofs) 3033 { 3034 ia64_info->minplt_entries 3035 = (data.ofs - PLT_HEADER_SIZE) / PLT_MIN_ENTRY_SIZE; 3036 } 3037 3038 /* Align the pointer for the plt2 entries. */ 3039 data.ofs = (data.ofs + 31) & (bfd_vma) -32; 3040 3041 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_plt2_entries, &data); 3042 if (data.ofs != 0 || ia64_info->root.dynamic_sections_created) 3043 { 3044 /* FIXME: we always reserve the memory for dynamic linker even if 3045 there are no PLT entries since dynamic linker may assume the 3046 reserved memory always exists. */ 3047 3048 BFD_ASSERT (ia64_info->root.dynamic_sections_created); 3049 3050 ia64_info->root.splt->size = data.ofs; 3051 3052 /* If we've got a .plt, we need some extra memory for the dynamic 3053 linker. We stuff these in .got.plt. */ 3054 sec = bfd_get_linker_section (dynobj, ".got.plt"); 3055 sec->size = 8 * PLT_RESERVED_WORDS; 3056 } 3057 3058 /* Allocate the PLTOFF entries. */ 3059 3060 if (ia64_info->pltoff_sec) 3061 { 3062 data.ofs = 0; 3063 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_pltoff_entries, &data); 3064 ia64_info->pltoff_sec->size = data.ofs; 3065 } 3066 3067 if (ia64_info->root.dynamic_sections_created) 3068 { 3069 /* Allocate space for the dynamic relocations that turned out to be 3070 required. */ 3071 3072 if (bfd_link_pic (info) && ia64_info->self_dtpmod_offset != (bfd_vma) -1) 3073 ia64_info->root.srelgot->size += sizeof (ElfNN_External_Rela); 3074 data.only_got = FALSE; 3075 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_dynrel_entries, &data); 3076 } 3077 3078 /* We have now determined the sizes of the various dynamic sections. 3079 Allocate memory for them. */ 3080 for (sec = dynobj->sections; sec != NULL; sec = sec->next) 3081 { 3082 bfd_boolean strip; 3083 3084 if (!(sec->flags & SEC_LINKER_CREATED)) 3085 continue; 3086 3087 /* If we don't need this section, strip it from the output file. 3088 There were several sections primarily related to dynamic 3089 linking that must be create before the linker maps input 3090 sections to output sections. The linker does that before 3091 bfd_elf_size_dynamic_sections is called, and it is that 3092 function which decides whether anything needs to go into 3093 these sections. */ 3094 3095 strip = (sec->size == 0); 3096 3097 if (sec == ia64_info->root.sgot) 3098 strip = FALSE; 3099 else if (sec == ia64_info->root.srelgot) 3100 { 3101 if (strip) 3102 ia64_info->root.srelgot = NULL; 3103 else 3104 /* We use the reloc_count field as a counter if we need to 3105 copy relocs into the output file. */ 3106 sec->reloc_count = 0; 3107 } 3108 else if (sec == ia64_info->fptr_sec) 3109 { 3110 if (strip) 3111 ia64_info->fptr_sec = NULL; 3112 } 3113 else if (sec == ia64_info->rel_fptr_sec) 3114 { 3115 if (strip) 3116 ia64_info->rel_fptr_sec = NULL; 3117 else 3118 /* We use the reloc_count field as a counter if we need to 3119 copy relocs into the output file. */ 3120 sec->reloc_count = 0; 3121 } 3122 else if (sec == ia64_info->root.splt) 3123 { 3124 if (strip) 3125 ia64_info->root.splt = NULL; 3126 } 3127 else if (sec == ia64_info->pltoff_sec) 3128 { 3129 if (strip) 3130 ia64_info->pltoff_sec = NULL; 3131 } 3132 else if (sec == ia64_info->rel_pltoff_sec) 3133 { 3134 if (strip) 3135 ia64_info->rel_pltoff_sec = NULL; 3136 else 3137 { 3138 relplt = TRUE; 3139 /* We use the reloc_count field as a counter if we need to 3140 copy relocs into the output file. */ 3141 sec->reloc_count = 0; 3142 } 3143 } 3144 else 3145 { 3146 const char *name; 3147 3148 /* It's OK to base decisions on the section name, because none 3149 of the dynobj section names depend upon the input files. */ 3150 name = bfd_get_section_name (dynobj, sec); 3151 3152 if (strcmp (name, ".got.plt") == 0) 3153 strip = FALSE; 3154 else if (CONST_STRNEQ (name, ".rel")) 3155 { 3156 if (!strip) 3157 { 3158 /* We use the reloc_count field as a counter if we need to 3159 copy relocs into the output file. */ 3160 sec->reloc_count = 0; 3161 } 3162 } 3163 else 3164 continue; 3165 } 3166 3167 if (strip) 3168 sec->flags |= SEC_EXCLUDE; 3169 else 3170 { 3171 /* Allocate memory for the section contents. */ 3172 sec->contents = (bfd_byte *) bfd_zalloc (dynobj, sec->size); 3173 if (sec->contents == NULL && sec->size != 0) 3174 return FALSE; 3175 } 3176 } 3177 3178 if (elf_hash_table (info)->dynamic_sections_created) 3179 { 3180 /* Add some entries to the .dynamic section. We fill in the values 3181 later (in finish_dynamic_sections) but we must add the entries now 3182 so that we get the correct size for the .dynamic section. */ 3183 3184 if (bfd_link_executable (info)) 3185 { 3186 /* The DT_DEBUG entry is filled in by the dynamic linker and used 3187 by the debugger. */ 3188#define add_dynamic_entry(TAG, VAL) \ 3189 _bfd_elf_add_dynamic_entry (info, TAG, VAL) 3190 3191 if (!add_dynamic_entry (DT_DEBUG, 0)) 3192 return FALSE; 3193 } 3194 3195 if (!add_dynamic_entry (DT_IA_64_PLT_RESERVE, 0)) 3196 return FALSE; 3197 if (!add_dynamic_entry (DT_PLTGOT, 0)) 3198 return FALSE; 3199 3200 if (relplt) 3201 { 3202 if (!add_dynamic_entry (DT_PLTRELSZ, 0) 3203 || !add_dynamic_entry (DT_PLTREL, DT_RELA) 3204 || !add_dynamic_entry (DT_JMPREL, 0)) 3205 return FALSE; 3206 } 3207 3208 if (!add_dynamic_entry (DT_RELA, 0) 3209 || !add_dynamic_entry (DT_RELASZ, 0) 3210 || !add_dynamic_entry (DT_RELAENT, sizeof (ElfNN_External_Rela))) 3211 return FALSE; 3212 3213 if (ia64_info->reltext) 3214 { 3215 if (!add_dynamic_entry (DT_TEXTREL, 0)) 3216 return FALSE; 3217 info->flags |= DF_TEXTREL; 3218 } 3219 } 3220 3221 /* ??? Perhaps force __gp local. */ 3222 3223 return TRUE; 3224} 3225 3226static void 3227elfNN_ia64_install_dyn_reloc (bfd *abfd, struct bfd_link_info *info, 3228 asection *sec, asection *srel, 3229 bfd_vma offset, unsigned int type, 3230 long dynindx, bfd_vma addend) 3231{ 3232 Elf_Internal_Rela outrel; 3233 bfd_byte *loc; 3234 3235 BFD_ASSERT (dynindx != -1); 3236 outrel.r_info = ELFNN_R_INFO (dynindx, type); 3237 outrel.r_addend = addend; 3238 outrel.r_offset = _bfd_elf_section_offset (abfd, info, sec, offset); 3239 if (outrel.r_offset >= (bfd_vma) -2) 3240 { 3241 /* Run for the hills. We shouldn't be outputting a relocation 3242 for this. So do what everyone else does and output a no-op. */ 3243 outrel.r_info = ELFNN_R_INFO (0, R_IA64_NONE); 3244 outrel.r_addend = 0; 3245 outrel.r_offset = 0; 3246 } 3247 else 3248 outrel.r_offset += sec->output_section->vma + sec->output_offset; 3249 3250 loc = srel->contents; 3251 loc += srel->reloc_count++ * sizeof (ElfNN_External_Rela); 3252 bfd_elfNN_swap_reloca_out (abfd, &outrel, loc); 3253 BFD_ASSERT (sizeof (ElfNN_External_Rela) * srel->reloc_count <= srel->size); 3254} 3255 3256/* Store an entry for target address TARGET_ADDR in the linkage table 3257 and return the gp-relative address of the linkage table entry. */ 3258 3259static bfd_vma 3260set_got_entry (bfd *abfd, struct bfd_link_info *info, 3261 struct elfNN_ia64_dyn_sym_info *dyn_i, 3262 long dynindx, bfd_vma addend, bfd_vma value, 3263 unsigned int dyn_r_type) 3264{ 3265 struct elfNN_ia64_link_hash_table *ia64_info; 3266 asection *got_sec; 3267 bfd_boolean done; 3268 bfd_vma got_offset; 3269 3270 ia64_info = elfNN_ia64_hash_table (info); 3271 if (ia64_info == NULL) 3272 return 0; 3273 3274 got_sec = ia64_info->root.sgot; 3275 3276 switch (dyn_r_type) 3277 { 3278 case R_IA64_TPREL64LSB: 3279 done = dyn_i->tprel_done; 3280 dyn_i->tprel_done = TRUE; 3281 got_offset = dyn_i->tprel_offset; 3282 break; 3283 case R_IA64_DTPMOD64LSB: 3284 if (dyn_i->dtpmod_offset != ia64_info->self_dtpmod_offset) 3285 { 3286 done = dyn_i->dtpmod_done; 3287 dyn_i->dtpmod_done = TRUE; 3288 } 3289 else 3290 { 3291 done = ia64_info->self_dtpmod_done; 3292 ia64_info->self_dtpmod_done = TRUE; 3293 dynindx = 0; 3294 } 3295 got_offset = dyn_i->dtpmod_offset; 3296 break; 3297 case R_IA64_DTPREL32LSB: 3298 case R_IA64_DTPREL64LSB: 3299 done = dyn_i->dtprel_done; 3300 dyn_i->dtprel_done = TRUE; 3301 got_offset = dyn_i->dtprel_offset; 3302 break; 3303 default: 3304 done = dyn_i->got_done; 3305 dyn_i->got_done = TRUE; 3306 got_offset = dyn_i->got_offset; 3307 break; 3308 } 3309 3310 BFD_ASSERT ((got_offset & 7) == 0); 3311 3312 if (! done) 3313 { 3314 /* Store the target address in the linkage table entry. */ 3315 bfd_put_64 (abfd, value, got_sec->contents + got_offset); 3316 3317 /* Install a dynamic relocation if needed. */ 3318 if (((bfd_link_pic (info) 3319 && (!dyn_i->h 3320 || ELF_ST_VISIBILITY (dyn_i->h->other) == STV_DEFAULT 3321 || dyn_i->h->root.type != bfd_link_hash_undefweak) 3322 && dyn_r_type != R_IA64_DTPREL32LSB 3323 && dyn_r_type != R_IA64_DTPREL64LSB) 3324 || elfNN_ia64_dynamic_symbol_p (dyn_i->h, info, dyn_r_type) 3325 || (dynindx != -1 3326 && (dyn_r_type == R_IA64_FPTR32LSB 3327 || dyn_r_type == R_IA64_FPTR64LSB))) 3328 && (!dyn_i->want_ltoff_fptr 3329 || !bfd_link_pie (info) 3330 || !dyn_i->h 3331 || dyn_i->h->root.type != bfd_link_hash_undefweak)) 3332 { 3333 if (dynindx == -1 3334 && dyn_r_type != R_IA64_TPREL64LSB 3335 && dyn_r_type != R_IA64_DTPMOD64LSB 3336 && dyn_r_type != R_IA64_DTPREL32LSB 3337 && dyn_r_type != R_IA64_DTPREL64LSB) 3338 { 3339 dyn_r_type = R_IA64_RELNNLSB; 3340 dynindx = 0; 3341 addend = value; 3342 } 3343 3344 if (bfd_big_endian (abfd)) 3345 { 3346 switch (dyn_r_type) 3347 { 3348 case R_IA64_REL32LSB: 3349 dyn_r_type = R_IA64_REL32MSB; 3350 break; 3351 case R_IA64_DIR32LSB: 3352 dyn_r_type = R_IA64_DIR32MSB; 3353 break; 3354 case R_IA64_FPTR32LSB: 3355 dyn_r_type = R_IA64_FPTR32MSB; 3356 break; 3357 case R_IA64_DTPREL32LSB: 3358 dyn_r_type = R_IA64_DTPREL32MSB; 3359 break; 3360 case R_IA64_REL64LSB: 3361 dyn_r_type = R_IA64_REL64MSB; 3362 break; 3363 case R_IA64_DIR64LSB: 3364 dyn_r_type = R_IA64_DIR64MSB; 3365 break; 3366 case R_IA64_FPTR64LSB: 3367 dyn_r_type = R_IA64_FPTR64MSB; 3368 break; 3369 case R_IA64_TPREL64LSB: 3370 dyn_r_type = R_IA64_TPREL64MSB; 3371 break; 3372 case R_IA64_DTPMOD64LSB: 3373 dyn_r_type = R_IA64_DTPMOD64MSB; 3374 break; 3375 case R_IA64_DTPREL64LSB: 3376 dyn_r_type = R_IA64_DTPREL64MSB; 3377 break; 3378 default: 3379 BFD_ASSERT (FALSE); 3380 break; 3381 } 3382 } 3383 3384 elfNN_ia64_install_dyn_reloc (abfd, NULL, got_sec, 3385 ia64_info->root.srelgot, 3386 got_offset, dyn_r_type, 3387 dynindx, addend); 3388 } 3389 } 3390 3391 /* Return the address of the linkage table entry. */ 3392 value = (got_sec->output_section->vma 3393 + got_sec->output_offset 3394 + got_offset); 3395 3396 return value; 3397} 3398 3399/* Fill in a function descriptor consisting of the function's code 3400 address and its global pointer. Return the descriptor's address. */ 3401 3402static bfd_vma 3403set_fptr_entry (bfd *abfd, struct bfd_link_info *info, 3404 struct elfNN_ia64_dyn_sym_info *dyn_i, 3405 bfd_vma value) 3406{ 3407 struct elfNN_ia64_link_hash_table *ia64_info; 3408 asection *fptr_sec; 3409 3410 ia64_info = elfNN_ia64_hash_table (info); 3411 if (ia64_info == NULL) 3412 return 0; 3413 3414 fptr_sec = ia64_info->fptr_sec; 3415 3416 if (!dyn_i->fptr_done) 3417 { 3418 dyn_i->fptr_done = 1; 3419 3420 /* Fill in the function descriptor. */ 3421 bfd_put_64 (abfd, value, fptr_sec->contents + dyn_i->fptr_offset); 3422 bfd_put_64 (abfd, _bfd_get_gp_value (abfd), 3423 fptr_sec->contents + dyn_i->fptr_offset + 8); 3424 if (ia64_info->rel_fptr_sec) 3425 { 3426 Elf_Internal_Rela outrel; 3427 bfd_byte *loc; 3428 3429 if (bfd_little_endian (abfd)) 3430 outrel.r_info = ELFNN_R_INFO (0, R_IA64_IPLTLSB); 3431 else 3432 outrel.r_info = ELFNN_R_INFO (0, R_IA64_IPLTMSB); 3433 outrel.r_addend = value; 3434 outrel.r_offset = (fptr_sec->output_section->vma 3435 + fptr_sec->output_offset 3436 + dyn_i->fptr_offset); 3437 loc = ia64_info->rel_fptr_sec->contents; 3438 loc += ia64_info->rel_fptr_sec->reloc_count++ 3439 * sizeof (ElfNN_External_Rela); 3440 bfd_elfNN_swap_reloca_out (abfd, &outrel, loc); 3441 } 3442 } 3443 3444 /* Return the descriptor's address. */ 3445 value = (fptr_sec->output_section->vma 3446 + fptr_sec->output_offset 3447 + dyn_i->fptr_offset); 3448 3449 return value; 3450} 3451 3452/* Fill in a PLTOFF entry consisting of the function's code address 3453 and its global pointer. Return the descriptor's address. */ 3454 3455static bfd_vma 3456set_pltoff_entry (bfd *abfd, struct bfd_link_info *info, 3457 struct elfNN_ia64_dyn_sym_info *dyn_i, 3458 bfd_vma value, bfd_boolean is_plt) 3459{ 3460 struct elfNN_ia64_link_hash_table *ia64_info; 3461 asection *pltoff_sec; 3462 3463 ia64_info = elfNN_ia64_hash_table (info); 3464 if (ia64_info == NULL) 3465 return 0; 3466 3467 pltoff_sec = ia64_info->pltoff_sec; 3468 3469 /* Don't do anything if this symbol uses a real PLT entry. In 3470 that case, we'll fill this in during finish_dynamic_symbol. */ 3471 if ((! dyn_i->want_plt || is_plt) 3472 && !dyn_i->pltoff_done) 3473 { 3474 bfd_vma gp = _bfd_get_gp_value (abfd); 3475 3476 /* Fill in the function descriptor. */ 3477 bfd_put_64 (abfd, value, pltoff_sec->contents + dyn_i->pltoff_offset); 3478 bfd_put_64 (abfd, gp, pltoff_sec->contents + dyn_i->pltoff_offset + 8); 3479 3480 /* Install dynamic relocations if needed. */ 3481 if (!is_plt 3482 && bfd_link_pic (info) 3483 && (!dyn_i->h 3484 || ELF_ST_VISIBILITY (dyn_i->h->other) == STV_DEFAULT 3485 || dyn_i->h->root.type != bfd_link_hash_undefweak)) 3486 { 3487 unsigned int dyn_r_type; 3488 3489 if (bfd_big_endian (abfd)) 3490 dyn_r_type = R_IA64_RELNNMSB; 3491 else 3492 dyn_r_type = R_IA64_RELNNLSB; 3493 3494 elfNN_ia64_install_dyn_reloc (abfd, NULL, pltoff_sec, 3495 ia64_info->rel_pltoff_sec, 3496 dyn_i->pltoff_offset, 3497 dyn_r_type, 0, value); 3498 elfNN_ia64_install_dyn_reloc (abfd, NULL, pltoff_sec, 3499 ia64_info->rel_pltoff_sec, 3500 dyn_i->pltoff_offset + ARCH_SIZE / 8, 3501 dyn_r_type, 0, gp); 3502 } 3503 3504 dyn_i->pltoff_done = 1; 3505 } 3506 3507 /* Return the descriptor's address. */ 3508 value = (pltoff_sec->output_section->vma 3509 + pltoff_sec->output_offset 3510 + dyn_i->pltoff_offset); 3511 3512 return value; 3513} 3514 3515/* Return the base VMA address which should be subtracted from real addresses 3516 when resolving @tprel() relocation. 3517 Main program TLS (whose template starts at PT_TLS p_vaddr) 3518 is assigned offset round(2 * size of pointer, PT_TLS p_align). */ 3519 3520static bfd_vma 3521elfNN_ia64_tprel_base (struct bfd_link_info *info) 3522{ 3523 asection *tls_sec = elf_hash_table (info)->tls_sec; 3524 return tls_sec->vma - align_power ((bfd_vma) ARCH_SIZE / 4, 3525 tls_sec->alignment_power); 3526} 3527 3528/* Return the base VMA address which should be subtracted from real addresses 3529 when resolving @dtprel() relocation. 3530 This is PT_TLS segment p_vaddr. */ 3531 3532static bfd_vma 3533elfNN_ia64_dtprel_base (struct bfd_link_info *info) 3534{ 3535 return elf_hash_table (info)->tls_sec->vma; 3536} 3537 3538/* Called through qsort to sort the .IA_64.unwind section during a 3539 non-relocatable link. Set elfNN_ia64_unwind_entry_compare_bfd 3540 to the output bfd so we can do proper endianness frobbing. */ 3541 3542static bfd *elfNN_ia64_unwind_entry_compare_bfd; 3543 3544static int 3545elfNN_ia64_unwind_entry_compare (const void * a, const void * b) 3546{ 3547 bfd_vma av, bv; 3548 3549 av = bfd_get_64 (elfNN_ia64_unwind_entry_compare_bfd, a); 3550 bv = bfd_get_64 (elfNN_ia64_unwind_entry_compare_bfd, b); 3551 3552 return (av < bv ? -1 : av > bv ? 1 : 0); 3553} 3554 3555/* Make sure we've got ourselves a nice fat __gp value. */ 3556static bfd_boolean 3557elfNN_ia64_choose_gp (bfd *abfd, struct bfd_link_info *info, bfd_boolean final) 3558{ 3559 bfd_vma min_vma = (bfd_vma) -1, max_vma = 0; 3560 bfd_vma min_short_vma = min_vma, max_short_vma = 0; 3561 struct elf_link_hash_entry *gp; 3562 bfd_vma gp_val; 3563 asection *os; 3564 struct elfNN_ia64_link_hash_table *ia64_info; 3565 3566 ia64_info = elfNN_ia64_hash_table (info); 3567 if (ia64_info == NULL) 3568 return FALSE; 3569 3570 /* Find the min and max vma of all sections marked short. Also collect 3571 min and max vma of any type, for use in selecting a nice gp. */ 3572 for (os = abfd->sections; os ; os = os->next) 3573 { 3574 bfd_vma lo, hi; 3575 3576 if ((os->flags & SEC_ALLOC) == 0) 3577 continue; 3578 3579 lo = os->vma; 3580 /* When this function is called from elfNN_ia64_final_link 3581 the correct value to use is os->size. When called from 3582 elfNN_ia64_relax_section we are in the middle of section 3583 sizing; some sections will already have os->size set, others 3584 will have os->size zero and os->rawsize the previous size. */ 3585 hi = os->vma + (!final && os->rawsize ? os->rawsize : os->size); 3586 if (hi < lo) 3587 hi = (bfd_vma) -1; 3588 3589 if (min_vma > lo) 3590 min_vma = lo; 3591 if (max_vma < hi) 3592 max_vma = hi; 3593 if (os->flags & SEC_SMALL_DATA) 3594 { 3595 if (min_short_vma > lo) 3596 min_short_vma = lo; 3597 if (max_short_vma < hi) 3598 max_short_vma = hi; 3599 } 3600 } 3601 3602 if (ia64_info->min_short_sec) 3603 { 3604 if (min_short_vma 3605 > (ia64_info->min_short_sec->vma 3606 + ia64_info->min_short_offset)) 3607 min_short_vma = (ia64_info->min_short_sec->vma 3608 + ia64_info->min_short_offset); 3609 if (max_short_vma 3610 < (ia64_info->max_short_sec->vma 3611 + ia64_info->max_short_offset)) 3612 max_short_vma = (ia64_info->max_short_sec->vma 3613 + ia64_info->max_short_offset); 3614 } 3615 3616 /* See if the user wants to force a value. */ 3617 gp = elf_link_hash_lookup (elf_hash_table (info), "__gp", FALSE, 3618 FALSE, FALSE); 3619 3620 if (gp 3621 && (gp->root.type == bfd_link_hash_defined 3622 || gp->root.type == bfd_link_hash_defweak)) 3623 { 3624 asection *gp_sec = gp->root.u.def.section; 3625 gp_val = (gp->root.u.def.value 3626 + gp_sec->output_section->vma 3627 + gp_sec->output_offset); 3628 } 3629 else 3630 { 3631 /* Pick a sensible value. */ 3632 3633 if (ia64_info->min_short_sec) 3634 { 3635 bfd_vma short_range = max_short_vma - min_short_vma; 3636 3637 /* If min_short_sec is set, pick one in the middle bewteen 3638 min_short_vma and max_short_vma. */ 3639 if (short_range >= 0x400000) 3640 goto overflow; 3641 gp_val = min_short_vma + short_range / 2; 3642 } 3643 else 3644 { 3645 asection *got_sec = ia64_info->root.sgot; 3646 3647 /* Start with just the address of the .got. */ 3648 if (got_sec) 3649 gp_val = got_sec->output_section->vma; 3650 else if (max_short_vma != 0) 3651 gp_val = min_short_vma; 3652 else if (max_vma - min_vma < 0x200000) 3653 gp_val = min_vma; 3654 else 3655 gp_val = max_vma - 0x200000 + 8; 3656 } 3657 3658 /* If it is possible to address the entire image, but we 3659 don't with the choice above, adjust. */ 3660 if (max_vma - min_vma < 0x400000 3661 && (max_vma - gp_val >= 0x200000 3662 || gp_val - min_vma > 0x200000)) 3663 gp_val = min_vma + 0x200000; 3664 else if (max_short_vma != 0) 3665 { 3666 /* If we don't cover all the short data, adjust. */ 3667 if (max_short_vma - gp_val >= 0x200000) 3668 gp_val = min_short_vma + 0x200000; 3669 3670 /* If we're addressing stuff past the end, adjust back. */ 3671 if (gp_val > max_vma) 3672 gp_val = max_vma - 0x200000 + 8; 3673 } 3674 } 3675 3676 /* Validate whether all SHF_IA_64_SHORT sections are within 3677 range of the chosen GP. */ 3678 3679 if (max_short_vma != 0) 3680 { 3681 if (max_short_vma - min_short_vma >= 0x400000) 3682 { 3683overflow: 3684 (*_bfd_error_handler) 3685 (_("%s: short data segment overflowed (0x%lx >= 0x400000)"), 3686 bfd_get_filename (abfd), 3687 (unsigned long) (max_short_vma - min_short_vma)); 3688 return FALSE; 3689 } 3690 else if ((gp_val > min_short_vma 3691 && gp_val - min_short_vma > 0x200000) 3692 || (gp_val < max_short_vma 3693 && max_short_vma - gp_val >= 0x200000)) 3694 { 3695 (*_bfd_error_handler) 3696 (_("%s: __gp does not cover short data segment"), 3697 bfd_get_filename (abfd)); 3698 return FALSE; 3699 } 3700 } 3701 3702 _bfd_set_gp_value (abfd, gp_val); 3703 3704 return TRUE; 3705} 3706 3707static bfd_boolean 3708elfNN_ia64_final_link (bfd *abfd, struct bfd_link_info *info) 3709{ 3710 struct elfNN_ia64_link_hash_table *ia64_info; 3711 asection *unwind_output_sec; 3712 3713 ia64_info = elfNN_ia64_hash_table (info); 3714 if (ia64_info == NULL) 3715 return FALSE; 3716 3717 /* Make sure we've got ourselves a nice fat __gp value. */ 3718 if (!bfd_link_relocatable (info)) 3719 { 3720 bfd_vma gp_val; 3721 struct elf_link_hash_entry *gp; 3722 3723 /* We assume after gp is set, section size will only decrease. We 3724 need to adjust gp for it. */ 3725 _bfd_set_gp_value (abfd, 0); 3726 if (! elfNN_ia64_choose_gp (abfd, info, TRUE)) 3727 return FALSE; 3728 gp_val = _bfd_get_gp_value (abfd); 3729 3730 gp = elf_link_hash_lookup (elf_hash_table (info), "__gp", FALSE, 3731 FALSE, FALSE); 3732 if (gp) 3733 { 3734 gp->root.type = bfd_link_hash_defined; 3735 gp->root.u.def.value = gp_val; 3736 gp->root.u.def.section = bfd_abs_section_ptr; 3737 } 3738 } 3739 3740 /* If we're producing a final executable, we need to sort the contents 3741 of the .IA_64.unwind section. Force this section to be relocated 3742 into memory rather than written immediately to the output file. */ 3743 unwind_output_sec = NULL; 3744 if (!bfd_link_relocatable (info)) 3745 { 3746 asection *s = bfd_get_section_by_name (abfd, ELF_STRING_ia64_unwind); 3747 if (s) 3748 { 3749 unwind_output_sec = s->output_section; 3750 unwind_output_sec->contents 3751 = bfd_malloc (unwind_output_sec->size); 3752 if (unwind_output_sec->contents == NULL) 3753 return FALSE; 3754 } 3755 } 3756 3757 /* Invoke the regular ELF backend linker to do all the work. */ 3758 if (!bfd_elf_final_link (abfd, info)) 3759 return FALSE; 3760 3761 if (unwind_output_sec) 3762 { 3763 elfNN_ia64_unwind_entry_compare_bfd = abfd; 3764 qsort (unwind_output_sec->contents, 3765 (size_t) (unwind_output_sec->size / 24), 3766 24, 3767 elfNN_ia64_unwind_entry_compare); 3768 3769 if (! bfd_set_section_contents (abfd, unwind_output_sec, 3770 unwind_output_sec->contents, (bfd_vma) 0, 3771 unwind_output_sec->size)) 3772 return FALSE; 3773 } 3774 3775 return TRUE; 3776} 3777 3778static bfd_boolean 3779elfNN_ia64_relocate_section (bfd *output_bfd, 3780 struct bfd_link_info *info, 3781 bfd *input_bfd, 3782 asection *input_section, 3783 bfd_byte *contents, 3784 Elf_Internal_Rela *relocs, 3785 Elf_Internal_Sym *local_syms, 3786 asection **local_sections) 3787{ 3788 struct elfNN_ia64_link_hash_table *ia64_info; 3789 Elf_Internal_Shdr *symtab_hdr; 3790 Elf_Internal_Rela *rel; 3791 Elf_Internal_Rela *relend; 3792 asection *srel; 3793 bfd_boolean ret_val = TRUE; /* for non-fatal errors */ 3794 bfd_vma gp_val; 3795 3796 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; 3797 ia64_info = elfNN_ia64_hash_table (info); 3798 if (ia64_info == NULL) 3799 return FALSE; 3800 3801 /* Infect various flags from the input section to the output section. */ 3802 if (bfd_link_relocatable (info)) 3803 { 3804 bfd_vma flags; 3805 3806 flags = elf_section_data(input_section)->this_hdr.sh_flags; 3807 flags &= SHF_IA_64_NORECOV; 3808 3809 elf_section_data(input_section->output_section) 3810 ->this_hdr.sh_flags |= flags; 3811 } 3812 3813 gp_val = _bfd_get_gp_value (output_bfd); 3814 srel = get_reloc_section (input_bfd, ia64_info, input_section, FALSE); 3815 3816 rel = relocs; 3817 relend = relocs + input_section->reloc_count; 3818 for (; rel < relend; ++rel) 3819 { 3820 struct elf_link_hash_entry *h; 3821 struct elfNN_ia64_dyn_sym_info *dyn_i; 3822 bfd_reloc_status_type r; 3823 reloc_howto_type *howto; 3824 unsigned long r_symndx; 3825 Elf_Internal_Sym *sym; 3826 unsigned int r_type; 3827 bfd_vma value; 3828 asection *sym_sec; 3829 bfd_byte *hit_addr; 3830 bfd_boolean dynamic_symbol_p; 3831 bfd_boolean undef_weak_ref; 3832 3833 r_type = ELFNN_R_TYPE (rel->r_info); 3834 if (r_type > R_IA64_MAX_RELOC_CODE) 3835 { 3836 (*_bfd_error_handler) 3837 (_("%B: unknown relocation type %d"), 3838 input_bfd, (int) r_type); 3839 bfd_set_error (bfd_error_bad_value); 3840 ret_val = FALSE; 3841 continue; 3842 } 3843 3844 howto = ia64_elf_lookup_howto (r_type); 3845 r_symndx = ELFNN_R_SYM (rel->r_info); 3846 h = NULL; 3847 sym = NULL; 3848 sym_sec = NULL; 3849 undef_weak_ref = FALSE; 3850 3851 if (r_symndx < symtab_hdr->sh_info) 3852 { 3853 /* Reloc against local symbol. */ 3854 asection *msec; 3855 sym = local_syms + r_symndx; 3856 sym_sec = local_sections[r_symndx]; 3857 msec = sym_sec; 3858 value = _bfd_elf_rela_local_sym (output_bfd, sym, &msec, rel); 3859 if (!bfd_link_relocatable (info) 3860 && (sym_sec->flags & SEC_MERGE) != 0 3861 && ELF_ST_TYPE (sym->st_info) == STT_SECTION 3862 && sym_sec->sec_info_type == SEC_INFO_TYPE_MERGE) 3863 { 3864 struct elfNN_ia64_local_hash_entry *loc_h; 3865 3866 loc_h = get_local_sym_hash (ia64_info, input_bfd, rel, FALSE); 3867 if (loc_h && ! loc_h->sec_merge_done) 3868 { 3869 struct elfNN_ia64_dyn_sym_info *dynent; 3870 unsigned int count; 3871 3872 for (count = loc_h->count, dynent = loc_h->info; 3873 count != 0; 3874 count--, dynent++) 3875 { 3876 msec = sym_sec; 3877 dynent->addend = 3878 _bfd_merged_section_offset (output_bfd, &msec, 3879 elf_section_data (msec)-> 3880 sec_info, 3881 sym->st_value 3882 + dynent->addend); 3883 dynent->addend -= sym->st_value; 3884 dynent->addend += msec->output_section->vma 3885 + msec->output_offset 3886 - sym_sec->output_section->vma 3887 - sym_sec->output_offset; 3888 } 3889 3890 /* We may have introduced duplicated entries. We need 3891 to remove them properly. */ 3892 count = sort_dyn_sym_info (loc_h->info, loc_h->count); 3893 if (count != loc_h->count) 3894 { 3895 loc_h->count = count; 3896 loc_h->sorted_count = count; 3897 } 3898 3899 loc_h->sec_merge_done = 1; 3900 } 3901 } 3902 } 3903 else 3904 { 3905 bfd_boolean unresolved_reloc; 3906 bfd_boolean warned, ignored; 3907 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd); 3908 3909 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 3910 r_symndx, symtab_hdr, sym_hashes, 3911 h, sym_sec, value, 3912 unresolved_reloc, warned, ignored); 3913 3914 if (h->root.type == bfd_link_hash_undefweak) 3915 undef_weak_ref = TRUE; 3916 else if (warned || (ignored && bfd_link_executable (info))) 3917 continue; 3918 } 3919 3920 if (sym_sec != NULL && discarded_section (sym_sec)) 3921 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, 3922 rel, 1, relend, howto, 0, contents); 3923 3924 if (bfd_link_relocatable (info)) 3925 continue; 3926 3927 hit_addr = contents + rel->r_offset; 3928 value += rel->r_addend; 3929 dynamic_symbol_p = elfNN_ia64_dynamic_symbol_p (h, info, r_type); 3930 3931 switch (r_type) 3932 { 3933 case R_IA64_NONE: 3934 case R_IA64_LDXMOV: 3935 continue; 3936 3937 case R_IA64_IMM14: 3938 case R_IA64_IMM22: 3939 case R_IA64_IMM64: 3940 case R_IA64_DIR32MSB: 3941 case R_IA64_DIR32LSB: 3942 case R_IA64_DIR64MSB: 3943 case R_IA64_DIR64LSB: 3944 /* Install a dynamic relocation for this reloc. */ 3945 if ((dynamic_symbol_p || bfd_link_pic (info)) 3946 && r_symndx != STN_UNDEF 3947 && (input_section->flags & SEC_ALLOC) != 0) 3948 { 3949 unsigned int dyn_r_type; 3950 long dynindx; 3951 bfd_vma addend; 3952 3953 BFD_ASSERT (srel != NULL); 3954 3955 switch (r_type) 3956 { 3957 case R_IA64_IMM14: 3958 case R_IA64_IMM22: 3959 case R_IA64_IMM64: 3960 /* ??? People shouldn't be doing non-pic code in 3961 shared libraries nor dynamic executables. */ 3962 (*_bfd_error_handler) 3963 (_("%B: non-pic code with imm relocation against dynamic symbol `%s'"), 3964 input_bfd, 3965 h ? h->root.root.string 3966 : bfd_elf_sym_name (input_bfd, symtab_hdr, sym, 3967 sym_sec)); 3968 ret_val = FALSE; 3969 continue; 3970 3971 default: 3972 break; 3973 } 3974 3975 /* If we don't need dynamic symbol lookup, find a 3976 matching RELATIVE relocation. */ 3977 dyn_r_type = r_type; 3978 if (dynamic_symbol_p) 3979 { 3980 dynindx = h->dynindx; 3981 addend = rel->r_addend; 3982 value = 0; 3983 } 3984 else 3985 { 3986 switch (r_type) 3987 { 3988 case R_IA64_DIR32MSB: 3989 dyn_r_type = R_IA64_REL32MSB; 3990 break; 3991 case R_IA64_DIR32LSB: 3992 dyn_r_type = R_IA64_REL32LSB; 3993 break; 3994 case R_IA64_DIR64MSB: 3995 dyn_r_type = R_IA64_REL64MSB; 3996 break; 3997 case R_IA64_DIR64LSB: 3998 dyn_r_type = R_IA64_REL64LSB; 3999 break; 4000 4001 default: 4002 break; 4003 } 4004 dynindx = 0; 4005 addend = value; 4006 } 4007 4008 elfNN_ia64_install_dyn_reloc (output_bfd, info, input_section, 4009 srel, rel->r_offset, dyn_r_type, 4010 dynindx, addend); 4011 } 4012 /* Fall through. */ 4013 4014 case R_IA64_LTV32MSB: 4015 case R_IA64_LTV32LSB: 4016 case R_IA64_LTV64MSB: 4017 case R_IA64_LTV64LSB: 4018 r = ia64_elf_install_value (hit_addr, value, r_type); 4019 break; 4020 4021 case R_IA64_GPREL22: 4022 case R_IA64_GPREL64I: 4023 case R_IA64_GPREL32MSB: 4024 case R_IA64_GPREL32LSB: 4025 case R_IA64_GPREL64MSB: 4026 case R_IA64_GPREL64LSB: 4027 if (dynamic_symbol_p) 4028 { 4029 (*_bfd_error_handler) 4030 (_("%B: @gprel relocation against dynamic symbol %s"), 4031 input_bfd, 4032 h ? h->root.root.string 4033 : bfd_elf_sym_name (input_bfd, symtab_hdr, sym, 4034 sym_sec)); 4035 ret_val = FALSE; 4036 continue; 4037 } 4038 value -= gp_val; 4039 r = ia64_elf_install_value (hit_addr, value, r_type); 4040 break; 4041 4042 case R_IA64_LTOFF22: 4043 case R_IA64_LTOFF22X: 4044 case R_IA64_LTOFF64I: 4045 dyn_i = get_dyn_sym_info (ia64_info, h, input_bfd, rel, FALSE); 4046 value = set_got_entry (input_bfd, info, dyn_i, (h ? h->dynindx : -1), 4047 rel->r_addend, value, R_IA64_DIRNNLSB); 4048 value -= gp_val; 4049 r = ia64_elf_install_value (hit_addr, value, r_type); 4050 break; 4051 4052 case R_IA64_PLTOFF22: 4053 case R_IA64_PLTOFF64I: 4054 case R_IA64_PLTOFF64MSB: 4055 case R_IA64_PLTOFF64LSB: 4056 dyn_i = get_dyn_sym_info (ia64_info, h, input_bfd, rel, FALSE); 4057 value = set_pltoff_entry (output_bfd, info, dyn_i, value, FALSE); 4058 value -= gp_val; 4059 r = ia64_elf_install_value (hit_addr, value, r_type); 4060 break; 4061 4062 case R_IA64_FPTR64I: 4063 case R_IA64_FPTR32MSB: 4064 case R_IA64_FPTR32LSB: 4065 case R_IA64_FPTR64MSB: 4066 case R_IA64_FPTR64LSB: 4067 dyn_i = get_dyn_sym_info (ia64_info, h, input_bfd, rel, FALSE); 4068 if (dyn_i->want_fptr) 4069 { 4070 if (!undef_weak_ref) 4071 value = set_fptr_entry (output_bfd, info, dyn_i, value); 4072 } 4073 if (!dyn_i->want_fptr || bfd_link_pie (info)) 4074 { 4075 long dynindx; 4076 unsigned int dyn_r_type = r_type; 4077 bfd_vma addend = rel->r_addend; 4078 4079 /* Otherwise, we expect the dynamic linker to create 4080 the entry. */ 4081 4082 if (dyn_i->want_fptr) 4083 { 4084 if (r_type == R_IA64_FPTR64I) 4085 { 4086 /* We can't represent this without a dynamic symbol. 4087 Adjust the relocation to be against an output 4088 section symbol, which are always present in the 4089 dynamic symbol table. */ 4090 /* ??? People shouldn't be doing non-pic code in 4091 shared libraries. Hork. */ 4092 (*_bfd_error_handler) 4093 (_("%B: linking non-pic code in a position independent executable"), 4094 input_bfd); 4095 ret_val = FALSE; 4096 continue; 4097 } 4098 dynindx = 0; 4099 addend = value; 4100 dyn_r_type = r_type + R_IA64_RELNNLSB - R_IA64_FPTRNNLSB; 4101 } 4102 else if (h) 4103 { 4104 if (h->dynindx != -1) 4105 dynindx = h->dynindx; 4106 else 4107 dynindx = (_bfd_elf_link_lookup_local_dynindx 4108 (info, h->root.u.def.section->owner, 4109 global_sym_index (h))); 4110 value = 0; 4111 } 4112 else 4113 { 4114 dynindx = (_bfd_elf_link_lookup_local_dynindx 4115 (info, input_bfd, (long) r_symndx)); 4116 value = 0; 4117 } 4118 4119 elfNN_ia64_install_dyn_reloc (output_bfd, info, input_section, 4120 srel, rel->r_offset, dyn_r_type, 4121 dynindx, addend); 4122 } 4123 4124 r = ia64_elf_install_value (hit_addr, value, r_type); 4125 break; 4126 4127 case R_IA64_LTOFF_FPTR22: 4128 case R_IA64_LTOFF_FPTR64I: 4129 case R_IA64_LTOFF_FPTR32MSB: 4130 case R_IA64_LTOFF_FPTR32LSB: 4131 case R_IA64_LTOFF_FPTR64MSB: 4132 case R_IA64_LTOFF_FPTR64LSB: 4133 { 4134 long dynindx; 4135 4136 dyn_i = get_dyn_sym_info (ia64_info, h, input_bfd, rel, FALSE); 4137 if (dyn_i->want_fptr) 4138 { 4139 BFD_ASSERT (h == NULL || h->dynindx == -1); 4140 if (!undef_weak_ref) 4141 value = set_fptr_entry (output_bfd, info, dyn_i, value); 4142 dynindx = -1; 4143 } 4144 else 4145 { 4146 /* Otherwise, we expect the dynamic linker to create 4147 the entry. */ 4148 if (h) 4149 { 4150 if (h->dynindx != -1) 4151 dynindx = h->dynindx; 4152 else 4153 dynindx = (_bfd_elf_link_lookup_local_dynindx 4154 (info, h->root.u.def.section->owner, 4155 global_sym_index (h))); 4156 } 4157 else 4158 dynindx = (_bfd_elf_link_lookup_local_dynindx 4159 (info, input_bfd, (long) r_symndx)); 4160 value = 0; 4161 } 4162 4163 value = set_got_entry (output_bfd, info, dyn_i, dynindx, 4164 rel->r_addend, value, R_IA64_FPTRNNLSB); 4165 value -= gp_val; 4166 r = ia64_elf_install_value (hit_addr, value, r_type); 4167 } 4168 break; 4169 4170 case R_IA64_PCREL32MSB: 4171 case R_IA64_PCREL32LSB: 4172 case R_IA64_PCREL64MSB: 4173 case R_IA64_PCREL64LSB: 4174 /* Install a dynamic relocation for this reloc. */ 4175 if (dynamic_symbol_p && r_symndx != STN_UNDEF) 4176 { 4177 BFD_ASSERT (srel != NULL); 4178 4179 elfNN_ia64_install_dyn_reloc (output_bfd, info, input_section, 4180 srel, rel->r_offset, r_type, 4181 h->dynindx, rel->r_addend); 4182 } 4183 goto finish_pcrel; 4184 4185 case R_IA64_PCREL21B: 4186 case R_IA64_PCREL60B: 4187 /* We should have created a PLT entry for any dynamic symbol. */ 4188 dyn_i = NULL; 4189 if (h) 4190 dyn_i = get_dyn_sym_info (ia64_info, h, NULL, NULL, FALSE); 4191 4192 if (dyn_i && dyn_i->want_plt2) 4193 { 4194 /* Should have caught this earlier. */ 4195 BFD_ASSERT (rel->r_addend == 0); 4196 4197 value = (ia64_info->root.splt->output_section->vma 4198 + ia64_info->root.splt->output_offset 4199 + dyn_i->plt2_offset); 4200 } 4201 else 4202 { 4203 /* Since there's no PLT entry, Validate that this is 4204 locally defined. */ 4205 BFD_ASSERT (undef_weak_ref || sym_sec->output_section != NULL); 4206 4207 /* If the symbol is undef_weak, we shouldn't be trying 4208 to call it. There's every chance that we'd wind up 4209 with an out-of-range fixup here. Don't bother setting 4210 any value at all. */ 4211 if (undef_weak_ref) 4212 continue; 4213 } 4214 goto finish_pcrel; 4215 4216 case R_IA64_PCREL21BI: 4217 case R_IA64_PCREL21F: 4218 case R_IA64_PCREL21M: 4219 case R_IA64_PCREL22: 4220 case R_IA64_PCREL64I: 4221 /* The PCREL21BI reloc is specifically not intended for use with 4222 dynamic relocs. PCREL21F and PCREL21M are used for speculation 4223 fixup code, and thus probably ought not be dynamic. The 4224 PCREL22 and PCREL64I relocs aren't emitted as dynamic relocs. */ 4225 if (dynamic_symbol_p) 4226 { 4227 const char *msg; 4228 4229 if (r_type == R_IA64_PCREL21BI) 4230 msg = _("%B: @internal branch to dynamic symbol %s"); 4231 else if (r_type == R_IA64_PCREL21F || r_type == R_IA64_PCREL21M) 4232 msg = _("%B: speculation fixup to dynamic symbol %s"); 4233 else 4234 msg = _("%B: @pcrel relocation against dynamic symbol %s"); 4235 (*_bfd_error_handler) (msg, input_bfd, 4236 h ? h->root.root.string 4237 : bfd_elf_sym_name (input_bfd, 4238 symtab_hdr, 4239 sym, 4240 sym_sec)); 4241 ret_val = FALSE; 4242 continue; 4243 } 4244 goto finish_pcrel; 4245 4246 finish_pcrel: 4247 /* Make pc-relative. */ 4248 value -= (input_section->output_section->vma 4249 + input_section->output_offset 4250 + rel->r_offset) & ~ (bfd_vma) 0x3; 4251 r = ia64_elf_install_value (hit_addr, value, r_type); 4252 break; 4253 4254 case R_IA64_SEGREL32MSB: 4255 case R_IA64_SEGREL32LSB: 4256 case R_IA64_SEGREL64MSB: 4257 case R_IA64_SEGREL64LSB: 4258 { 4259 /* Find the segment that contains the output_section. */ 4260 Elf_Internal_Phdr *p = _bfd_elf_find_segment_containing_section 4261 (output_bfd, input_section->output_section); 4262 4263 if (p == NULL) 4264 { 4265 r = bfd_reloc_notsupported; 4266 } 4267 else 4268 { 4269 /* The VMA of the segment is the vaddr of the associated 4270 program header. */ 4271 if (value > p->p_vaddr) 4272 value -= p->p_vaddr; 4273 else 4274 value = 0; 4275 r = ia64_elf_install_value (hit_addr, value, r_type); 4276 } 4277 break; 4278 } 4279 4280 case R_IA64_SECREL32MSB: 4281 case R_IA64_SECREL32LSB: 4282 case R_IA64_SECREL64MSB: 4283 case R_IA64_SECREL64LSB: 4284 /* Make output-section relative to section where the symbol 4285 is defined. PR 475 */ 4286 if (sym_sec) 4287 value -= sym_sec->output_section->vma; 4288 r = ia64_elf_install_value (hit_addr, value, r_type); 4289 break; 4290 4291 case R_IA64_IPLTMSB: 4292 case R_IA64_IPLTLSB: 4293 /* Install a dynamic relocation for this reloc. */ 4294 if ((dynamic_symbol_p || bfd_link_pic (info)) 4295 && (input_section->flags & SEC_ALLOC) != 0) 4296 { 4297 BFD_ASSERT (srel != NULL); 4298 4299 /* If we don't need dynamic symbol lookup, install two 4300 RELATIVE relocations. */ 4301 if (!dynamic_symbol_p) 4302 { 4303 unsigned int dyn_r_type; 4304 4305 if (r_type == R_IA64_IPLTMSB) 4306 dyn_r_type = R_IA64_REL64MSB; 4307 else 4308 dyn_r_type = R_IA64_REL64LSB; 4309 4310 elfNN_ia64_install_dyn_reloc (output_bfd, info, 4311 input_section, 4312 srel, rel->r_offset, 4313 dyn_r_type, 0, value); 4314 elfNN_ia64_install_dyn_reloc (output_bfd, info, 4315 input_section, 4316 srel, rel->r_offset + 8, 4317 dyn_r_type, 0, gp_val); 4318 } 4319 else 4320 elfNN_ia64_install_dyn_reloc (output_bfd, info, input_section, 4321 srel, rel->r_offset, r_type, 4322 h->dynindx, rel->r_addend); 4323 } 4324 4325 if (r_type == R_IA64_IPLTMSB) 4326 r_type = R_IA64_DIR64MSB; 4327 else 4328 r_type = R_IA64_DIR64LSB; 4329 ia64_elf_install_value (hit_addr, value, r_type); 4330 r = ia64_elf_install_value (hit_addr + 8, gp_val, r_type); 4331 break; 4332 4333 case R_IA64_TPREL14: 4334 case R_IA64_TPREL22: 4335 case R_IA64_TPREL64I: 4336 if (elf_hash_table (info)->tls_sec == NULL) 4337 goto missing_tls_sec; 4338 value -= elfNN_ia64_tprel_base (info); 4339 r = ia64_elf_install_value (hit_addr, value, r_type); 4340 break; 4341 4342 case R_IA64_DTPREL14: 4343 case R_IA64_DTPREL22: 4344 case R_IA64_DTPREL64I: 4345 case R_IA64_DTPREL32LSB: 4346 case R_IA64_DTPREL32MSB: 4347 case R_IA64_DTPREL64LSB: 4348 case R_IA64_DTPREL64MSB: 4349 if (elf_hash_table (info)->tls_sec == NULL) 4350 goto missing_tls_sec; 4351 value -= elfNN_ia64_dtprel_base (info); 4352 r = ia64_elf_install_value (hit_addr, value, r_type); 4353 break; 4354 4355 case R_IA64_LTOFF_TPREL22: 4356 case R_IA64_LTOFF_DTPMOD22: 4357 case R_IA64_LTOFF_DTPREL22: 4358 { 4359 int got_r_type; 4360 long dynindx = h ? h->dynindx : -1; 4361 bfd_vma r_addend = rel->r_addend; 4362 4363 switch (r_type) 4364 { 4365 default: 4366 case R_IA64_LTOFF_TPREL22: 4367 if (!dynamic_symbol_p) 4368 { 4369 if (elf_hash_table (info)->tls_sec == NULL) 4370 goto missing_tls_sec; 4371 if (!bfd_link_pic (info)) 4372 value -= elfNN_ia64_tprel_base (info); 4373 else 4374 { 4375 r_addend += value - elfNN_ia64_dtprel_base (info); 4376 dynindx = 0; 4377 } 4378 } 4379 got_r_type = R_IA64_TPREL64LSB; 4380 break; 4381 case R_IA64_LTOFF_DTPMOD22: 4382 if (!dynamic_symbol_p && !bfd_link_pic (info)) 4383 value = 1; 4384 got_r_type = R_IA64_DTPMOD64LSB; 4385 break; 4386 case R_IA64_LTOFF_DTPREL22: 4387 if (!dynamic_symbol_p) 4388 { 4389 if (elf_hash_table (info)->tls_sec == NULL) 4390 goto missing_tls_sec; 4391 value -= elfNN_ia64_dtprel_base (info); 4392 } 4393 got_r_type = R_IA64_DTPRELNNLSB; 4394 break; 4395 } 4396 dyn_i = get_dyn_sym_info (ia64_info, h, input_bfd, rel, FALSE); 4397 value = set_got_entry (input_bfd, info, dyn_i, dynindx, r_addend, 4398 value, got_r_type); 4399 value -= gp_val; 4400 r = ia64_elf_install_value (hit_addr, value, r_type); 4401 } 4402 break; 4403 4404 default: 4405 r = bfd_reloc_notsupported; 4406 break; 4407 } 4408 4409 switch (r) 4410 { 4411 case bfd_reloc_ok: 4412 break; 4413 4414 case bfd_reloc_undefined: 4415 /* This can happen for global table relative relocs if 4416 __gp is undefined. This is a panic situation so we 4417 don't try to continue. */ 4418 (*info->callbacks->undefined_symbol) 4419 (info, "__gp", input_bfd, input_section, rel->r_offset, 1); 4420 return FALSE; 4421 4422 case bfd_reloc_notsupported: 4423 { 4424 const char *name; 4425 4426 if (h) 4427 name = h->root.root.string; 4428 else 4429 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, 4430 sym_sec); 4431 if (!(*info->callbacks->warning) (info, _("unsupported reloc"), 4432 name, input_bfd, 4433 input_section, rel->r_offset)) 4434 return FALSE; 4435 ret_val = FALSE; 4436 } 4437 break; 4438 4439 case bfd_reloc_dangerous: 4440 case bfd_reloc_outofrange: 4441 case bfd_reloc_overflow: 4442 default: 4443missing_tls_sec: 4444 { 4445 const char *name; 4446 4447 if (h) 4448 name = h->root.root.string; 4449 else 4450 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, 4451 sym_sec); 4452 4453 switch (r_type) 4454 { 4455 case R_IA64_TPREL14: 4456 case R_IA64_TPREL22: 4457 case R_IA64_TPREL64I: 4458 case R_IA64_DTPREL14: 4459 case R_IA64_DTPREL22: 4460 case R_IA64_DTPREL64I: 4461 case R_IA64_DTPREL32LSB: 4462 case R_IA64_DTPREL32MSB: 4463 case R_IA64_DTPREL64LSB: 4464 case R_IA64_DTPREL64MSB: 4465 case R_IA64_LTOFF_TPREL22: 4466 case R_IA64_LTOFF_DTPMOD22: 4467 case R_IA64_LTOFF_DTPREL22: 4468 (*_bfd_error_handler) 4469 (_("%B: missing TLS section for relocation %s against `%s' at 0x%lx in section `%A'."), 4470 input_bfd, input_section, howto->name, name, 4471 rel->r_offset); 4472 break; 4473 4474 case R_IA64_PCREL21B: 4475 case R_IA64_PCREL21BI: 4476 case R_IA64_PCREL21M: 4477 case R_IA64_PCREL21F: 4478 if (is_elf_hash_table (info->hash)) 4479 { 4480 /* Relaxtion is always performed for ELF output. 4481 Overflow failures for those relocations mean 4482 that the section is too big to relax. */ 4483 (*_bfd_error_handler) 4484 (_("%B: Can't relax br (%s) to `%s' at 0x%lx in section `%A' with size 0x%lx (> 0x1000000)."), 4485 input_bfd, input_section, howto->name, name, 4486 rel->r_offset, input_section->size); 4487 break; 4488 } 4489 default: 4490 if (!(*info->callbacks->reloc_overflow) (info, 4491 &h->root, 4492 name, 4493 howto->name, 4494 (bfd_vma) 0, 4495 input_bfd, 4496 input_section, 4497 rel->r_offset)) 4498 return FALSE; 4499 break; 4500 } 4501 4502 ret_val = FALSE; 4503 } 4504 break; 4505 } 4506 } 4507 4508 return ret_val; 4509} 4510 4511static bfd_boolean 4512elfNN_ia64_finish_dynamic_symbol (bfd *output_bfd, 4513 struct bfd_link_info *info, 4514 struct elf_link_hash_entry *h, 4515 Elf_Internal_Sym *sym) 4516{ 4517 struct elfNN_ia64_link_hash_table *ia64_info; 4518 struct elfNN_ia64_dyn_sym_info *dyn_i; 4519 4520 ia64_info = elfNN_ia64_hash_table (info); 4521 if (ia64_info == NULL) 4522 return FALSE; 4523 4524 dyn_i = get_dyn_sym_info (ia64_info, h, NULL, NULL, FALSE); 4525 4526 /* Fill in the PLT data, if required. */ 4527 if (dyn_i && dyn_i->want_plt) 4528 { 4529 Elf_Internal_Rela outrel; 4530 bfd_byte *loc; 4531 asection *plt_sec; 4532 bfd_vma plt_addr, pltoff_addr, gp_val, plt_index; 4533 4534 gp_val = _bfd_get_gp_value (output_bfd); 4535 4536 /* Initialize the minimal PLT entry. */ 4537 4538 plt_index = (dyn_i->plt_offset - PLT_HEADER_SIZE) / PLT_MIN_ENTRY_SIZE; 4539 plt_sec = ia64_info->root.splt; 4540 loc = plt_sec->contents + dyn_i->plt_offset; 4541 4542 memcpy (loc, plt_min_entry, PLT_MIN_ENTRY_SIZE); 4543 ia64_elf_install_value (loc, plt_index, R_IA64_IMM22); 4544 ia64_elf_install_value (loc+2, -dyn_i->plt_offset, R_IA64_PCREL21B); 4545 4546 plt_addr = (plt_sec->output_section->vma 4547 + plt_sec->output_offset 4548 + dyn_i->plt_offset); 4549 pltoff_addr = set_pltoff_entry (output_bfd, info, dyn_i, plt_addr, TRUE); 4550 4551 /* Initialize the FULL PLT entry, if needed. */ 4552 if (dyn_i->want_plt2) 4553 { 4554 loc = plt_sec->contents + dyn_i->plt2_offset; 4555 4556 memcpy (loc, plt_full_entry, PLT_FULL_ENTRY_SIZE); 4557 ia64_elf_install_value (loc, pltoff_addr - gp_val, R_IA64_IMM22); 4558 4559 /* Mark the symbol as undefined, rather than as defined in the 4560 plt section. Leave the value alone. */ 4561 /* ??? We didn't redefine it in adjust_dynamic_symbol in the 4562 first place. But perhaps elflink.c did some for us. */ 4563 if (!h->def_regular) 4564 sym->st_shndx = SHN_UNDEF; 4565 } 4566 4567 /* Create the dynamic relocation. */ 4568 outrel.r_offset = pltoff_addr; 4569 if (bfd_little_endian (output_bfd)) 4570 outrel.r_info = ELFNN_R_INFO (h->dynindx, R_IA64_IPLTLSB); 4571 else 4572 outrel.r_info = ELFNN_R_INFO (h->dynindx, R_IA64_IPLTMSB); 4573 outrel.r_addend = 0; 4574 4575 /* This is fun. In the .IA_64.pltoff section, we've got entries 4576 that correspond both to real PLT entries, and those that 4577 happened to resolve to local symbols but need to be created 4578 to satisfy @pltoff relocations. The .rela.IA_64.pltoff 4579 relocations for the real PLT should come at the end of the 4580 section, so that they can be indexed by plt entry at runtime. 4581 4582 We emitted all of the relocations for the non-PLT @pltoff 4583 entries during relocate_section. So we can consider the 4584 existing sec->reloc_count to be the base of the array of 4585 PLT relocations. */ 4586 4587 loc = ia64_info->rel_pltoff_sec->contents; 4588 loc += ((ia64_info->rel_pltoff_sec->reloc_count + plt_index) 4589 * sizeof (ElfNN_External_Rela)); 4590 bfd_elfNN_swap_reloca_out (output_bfd, &outrel, loc); 4591 } 4592 4593 /* Mark some specially defined symbols as absolute. */ 4594 if (h == ia64_info->root.hdynamic 4595 || h == ia64_info->root.hgot 4596 || h == ia64_info->root.hplt) 4597 sym->st_shndx = SHN_ABS; 4598 4599 return TRUE; 4600} 4601 4602static bfd_boolean 4603elfNN_ia64_finish_dynamic_sections (bfd *abfd, 4604 struct bfd_link_info *info) 4605{ 4606 struct elfNN_ia64_link_hash_table *ia64_info; 4607 bfd *dynobj; 4608 4609 ia64_info = elfNN_ia64_hash_table (info); 4610 if (ia64_info == NULL) 4611 return FALSE; 4612 4613 dynobj = ia64_info->root.dynobj; 4614 4615 if (elf_hash_table (info)->dynamic_sections_created) 4616 { 4617 ElfNN_External_Dyn *dyncon, *dynconend; 4618 asection *sdyn, *sgotplt; 4619 bfd_vma gp_val; 4620 4621 sdyn = bfd_get_linker_section (dynobj, ".dynamic"); 4622 sgotplt = bfd_get_linker_section (dynobj, ".got.plt"); 4623 BFD_ASSERT (sdyn != NULL); 4624 dyncon = (ElfNN_External_Dyn *) sdyn->contents; 4625 dynconend = (ElfNN_External_Dyn *) (sdyn->contents + sdyn->size); 4626 4627 gp_val = _bfd_get_gp_value (abfd); 4628 4629 for (; dyncon < dynconend; dyncon++) 4630 { 4631 Elf_Internal_Dyn dyn; 4632 4633 bfd_elfNN_swap_dyn_in (dynobj, dyncon, &dyn); 4634 4635 switch (dyn.d_tag) 4636 { 4637 case DT_PLTGOT: 4638 dyn.d_un.d_ptr = gp_val; 4639 break; 4640 4641 case DT_PLTRELSZ: 4642 dyn.d_un.d_val = (ia64_info->minplt_entries 4643 * sizeof (ElfNN_External_Rela)); 4644 break; 4645 4646 case DT_JMPREL: 4647 /* See the comment above in finish_dynamic_symbol. */ 4648 dyn.d_un.d_ptr = (ia64_info->rel_pltoff_sec->output_section->vma 4649 + ia64_info->rel_pltoff_sec->output_offset 4650 + (ia64_info->rel_pltoff_sec->reloc_count 4651 * sizeof (ElfNN_External_Rela))); 4652 break; 4653 4654 case DT_IA_64_PLT_RESERVE: 4655 dyn.d_un.d_ptr = (sgotplt->output_section->vma 4656 + sgotplt->output_offset); 4657 break; 4658 4659 case DT_RELASZ: 4660 /* Do not have RELASZ include JMPREL. This makes things 4661 easier on ld.so. This is not what the rest of BFD set up. */ 4662 dyn.d_un.d_val -= (ia64_info->minplt_entries 4663 * sizeof (ElfNN_External_Rela)); 4664 break; 4665 } 4666 4667 bfd_elfNN_swap_dyn_out (abfd, &dyn, dyncon); 4668 } 4669 4670 /* Initialize the PLT0 entry. */ 4671 if (ia64_info->root.splt) 4672 { 4673 bfd_byte *loc = ia64_info->root.splt->contents; 4674 bfd_vma pltres; 4675 4676 memcpy (loc, plt_header, PLT_HEADER_SIZE); 4677 4678 pltres = (sgotplt->output_section->vma 4679 + sgotplt->output_offset 4680 - gp_val); 4681 4682 ia64_elf_install_value (loc+1, pltres, R_IA64_GPREL22); 4683 } 4684 } 4685 4686 return TRUE; 4687} 4688 4689/* ELF file flag handling: */ 4690 4691/* Function to keep IA-64 specific file flags. */ 4692static bfd_boolean 4693elfNN_ia64_set_private_flags (bfd *abfd, flagword flags) 4694{ 4695 BFD_ASSERT (!elf_flags_init (abfd) 4696 || elf_elfheader (abfd)->e_flags == flags); 4697 4698 elf_elfheader (abfd)->e_flags = flags; 4699 elf_flags_init (abfd) = TRUE; 4700 return TRUE; 4701} 4702 4703/* Merge backend specific data from an object file to the output 4704 object file when linking. */ 4705static bfd_boolean 4706elfNN_ia64_merge_private_bfd_data (bfd *ibfd, bfd *obfd) 4707{ 4708 flagword out_flags; 4709 flagword in_flags; 4710 bfd_boolean ok = TRUE; 4711 4712 /* Don't even pretend to support mixed-format linking. */ 4713 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour 4714 || bfd_get_flavour (obfd) != bfd_target_elf_flavour) 4715 return FALSE; 4716 4717 in_flags = elf_elfheader (ibfd)->e_flags; 4718 out_flags = elf_elfheader (obfd)->e_flags; 4719 4720 if (! elf_flags_init (obfd)) 4721 { 4722 elf_flags_init (obfd) = TRUE; 4723 elf_elfheader (obfd)->e_flags = in_flags; 4724 4725 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) 4726 && bfd_get_arch_info (obfd)->the_default) 4727 { 4728 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), 4729 bfd_get_mach (ibfd)); 4730 } 4731 4732 return TRUE; 4733 } 4734 4735 /* Check flag compatibility. */ 4736 if (in_flags == out_flags) 4737 return TRUE; 4738 4739 /* Output has EF_IA_64_REDUCEDFP set only if all inputs have it set. */ 4740 if (!(in_flags & EF_IA_64_REDUCEDFP) && (out_flags & EF_IA_64_REDUCEDFP)) 4741 elf_elfheader (obfd)->e_flags &= ~EF_IA_64_REDUCEDFP; 4742 4743 if ((in_flags & EF_IA_64_TRAPNIL) != (out_flags & EF_IA_64_TRAPNIL)) 4744 { 4745 (*_bfd_error_handler) 4746 (_("%B: linking trap-on-NULL-dereference with non-trapping files"), 4747 ibfd); 4748 4749 bfd_set_error (bfd_error_bad_value); 4750 ok = FALSE; 4751 } 4752 if ((in_flags & EF_IA_64_BE) != (out_flags & EF_IA_64_BE)) 4753 { 4754 (*_bfd_error_handler) 4755 (_("%B: linking big-endian files with little-endian files"), 4756 ibfd); 4757 4758 bfd_set_error (bfd_error_bad_value); 4759 ok = FALSE; 4760 } 4761 if ((in_flags & EF_IA_64_ABI64) != (out_flags & EF_IA_64_ABI64)) 4762 { 4763 (*_bfd_error_handler) 4764 (_("%B: linking 64-bit files with 32-bit files"), 4765 ibfd); 4766 4767 bfd_set_error (bfd_error_bad_value); 4768 ok = FALSE; 4769 } 4770 if ((in_flags & EF_IA_64_CONS_GP) != (out_flags & EF_IA_64_CONS_GP)) 4771 { 4772 (*_bfd_error_handler) 4773 (_("%B: linking constant-gp files with non-constant-gp files"), 4774 ibfd); 4775 4776 bfd_set_error (bfd_error_bad_value); 4777 ok = FALSE; 4778 } 4779 if ((in_flags & EF_IA_64_NOFUNCDESC_CONS_GP) 4780 != (out_flags & EF_IA_64_NOFUNCDESC_CONS_GP)) 4781 { 4782 (*_bfd_error_handler) 4783 (_("%B: linking auto-pic files with non-auto-pic files"), 4784 ibfd); 4785 4786 bfd_set_error (bfd_error_bad_value); 4787 ok = FALSE; 4788 } 4789 4790 return ok; 4791} 4792 4793static bfd_boolean 4794elfNN_ia64_print_private_bfd_data (bfd *abfd, void * ptr) 4795{ 4796 FILE *file = (FILE *) ptr; 4797 flagword flags = elf_elfheader (abfd)->e_flags; 4798 4799 BFD_ASSERT (abfd != NULL && ptr != NULL); 4800 4801 fprintf (file, "private flags = %s%s%s%s%s%s%s%s\n", 4802 (flags & EF_IA_64_TRAPNIL) ? "TRAPNIL, " : "", 4803 (flags & EF_IA_64_EXT) ? "EXT, " : "", 4804 (flags & EF_IA_64_BE) ? "BE, " : "LE, ", 4805 (flags & EF_IA_64_REDUCEDFP) ? "REDUCEDFP, " : "", 4806 (flags & EF_IA_64_CONS_GP) ? "CONS_GP, " : "", 4807 (flags & EF_IA_64_NOFUNCDESC_CONS_GP) ? "NOFUNCDESC_CONS_GP, " : "", 4808 (flags & EF_IA_64_ABSOLUTE) ? "ABSOLUTE, " : "", 4809 (flags & EF_IA_64_ABI64) ? "ABI64" : "ABI32"); 4810 4811 _bfd_elf_print_private_bfd_data (abfd, ptr); 4812 return TRUE; 4813} 4814 4815static enum elf_reloc_type_class 4816elfNN_ia64_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, 4817 const asection *rel_sec ATTRIBUTE_UNUSED, 4818 const Elf_Internal_Rela *rela) 4819{ 4820 switch ((int) ELFNN_R_TYPE (rela->r_info)) 4821 { 4822 case R_IA64_REL32MSB: 4823 case R_IA64_REL32LSB: 4824 case R_IA64_REL64MSB: 4825 case R_IA64_REL64LSB: 4826 return reloc_class_relative; 4827 case R_IA64_IPLTMSB: 4828 case R_IA64_IPLTLSB: 4829 return reloc_class_plt; 4830 case R_IA64_COPY: 4831 return reloc_class_copy; 4832 default: 4833 return reloc_class_normal; 4834 } 4835} 4836 4837static const struct bfd_elf_special_section elfNN_ia64_special_sections[] = 4838{ 4839 { STRING_COMMA_LEN (".sbss"), -1, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_IA_64_SHORT }, 4840 { STRING_COMMA_LEN (".sdata"), -1, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_IA_64_SHORT }, 4841 { NULL, 0, 0, 0, 0 } 4842}; 4843 4844static bfd_boolean 4845elfNN_ia64_object_p (bfd *abfd) 4846{ 4847 asection *sec; 4848 asection *group, *unwi, *unw; 4849 flagword flags; 4850 const char *name; 4851 char *unwi_name, *unw_name; 4852 bfd_size_type amt; 4853 4854 if (abfd->flags & DYNAMIC) 4855 return TRUE; 4856 4857 /* Flags for fake group section. */ 4858 flags = (SEC_LINKER_CREATED | SEC_GROUP | SEC_LINK_ONCE 4859 | SEC_EXCLUDE); 4860 4861 /* We add a fake section group for each .gnu.linkonce.t.* section, 4862 which isn't in a section group, and its unwind sections. */ 4863 for (sec = abfd->sections; sec != NULL; sec = sec->next) 4864 { 4865 if (elf_sec_group (sec) == NULL 4866 && ((sec->flags & (SEC_LINK_ONCE | SEC_CODE | SEC_GROUP)) 4867 == (SEC_LINK_ONCE | SEC_CODE)) 4868 && CONST_STRNEQ (sec->name, ".gnu.linkonce.t.")) 4869 { 4870 name = sec->name + 16; 4871 4872 amt = strlen (name) + sizeof (".gnu.linkonce.ia64unwi."); 4873 unwi_name = bfd_alloc (abfd, amt); 4874 if (!unwi_name) 4875 return FALSE; 4876 4877 strcpy (stpcpy (unwi_name, ".gnu.linkonce.ia64unwi."), name); 4878 unwi = bfd_get_section_by_name (abfd, unwi_name); 4879 4880 amt = strlen (name) + sizeof (".gnu.linkonce.ia64unw."); 4881 unw_name = bfd_alloc (abfd, amt); 4882 if (!unw_name) 4883 return FALSE; 4884 4885 strcpy (stpcpy (unw_name, ".gnu.linkonce.ia64unw."), name); 4886 unw = bfd_get_section_by_name (abfd, unw_name); 4887 4888 /* We need to create a fake group section for it and its 4889 unwind sections. */ 4890 group = bfd_make_section_anyway_with_flags (abfd, name, 4891 flags); 4892 if (group == NULL) 4893 return FALSE; 4894 4895 /* Move the fake group section to the beginning. */ 4896 bfd_section_list_remove (abfd, group); 4897 bfd_section_list_prepend (abfd, group); 4898 4899 elf_next_in_group (group) = sec; 4900 4901 elf_group_name (sec) = name; 4902 elf_next_in_group (sec) = sec; 4903 elf_sec_group (sec) = group; 4904 4905 if (unwi) 4906 { 4907 elf_group_name (unwi) = name; 4908 elf_next_in_group (unwi) = sec; 4909 elf_next_in_group (sec) = unwi; 4910 elf_sec_group (unwi) = group; 4911 } 4912 4913 if (unw) 4914 { 4915 elf_group_name (unw) = name; 4916 if (unwi) 4917 { 4918 elf_next_in_group (unw) = elf_next_in_group (unwi); 4919 elf_next_in_group (unwi) = unw; 4920 } 4921 else 4922 { 4923 elf_next_in_group (unw) = sec; 4924 elf_next_in_group (sec) = unw; 4925 } 4926 elf_sec_group (unw) = group; 4927 } 4928 4929 /* Fake SHT_GROUP section header. */ 4930 elf_section_data (group)->this_hdr.bfd_section = group; 4931 elf_section_data (group)->this_hdr.sh_type = SHT_GROUP; 4932 } 4933 } 4934 return TRUE; 4935} 4936 4937static bfd_boolean 4938elfNN_ia64_hpux_vec (const bfd_target *vec) 4939{ 4940 extern const bfd_target ia64_elfNN_hpux_be_vec; 4941 return (vec == &ia64_elfNN_hpux_be_vec); 4942} 4943 4944static void 4945elfNN_hpux_post_process_headers (bfd *abfd, 4946 struct bfd_link_info *info ATTRIBUTE_UNUSED) 4947{ 4948 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd); 4949 4950 i_ehdrp->e_ident[EI_OSABI] = get_elf_backend_data (abfd)->elf_osabi; 4951 i_ehdrp->e_ident[EI_ABIVERSION] = 1; 4952} 4953 4954static bfd_boolean 4955elfNN_hpux_backend_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED, 4956 asection *sec, int *retval) 4957{ 4958 if (bfd_is_com_section (sec)) 4959 { 4960 *retval = SHN_IA_64_ANSI_COMMON; 4961 return TRUE; 4962 } 4963 return FALSE; 4964} 4965 4966static void 4967elfNN_hpux_backend_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, 4968 asymbol *asym) 4969{ 4970 elf_symbol_type *elfsym = (elf_symbol_type *) asym; 4971 4972 switch (elfsym->internal_elf_sym.st_shndx) 4973 { 4974 case SHN_IA_64_ANSI_COMMON: 4975 asym->section = bfd_com_section_ptr; 4976 asym->value = elfsym->internal_elf_sym.st_size; 4977 asym->flags &= ~BSF_GLOBAL; 4978 break; 4979 } 4980} 4981 4982#define TARGET_LITTLE_SYM ia64_elfNN_le_vec 4983#define TARGET_LITTLE_NAME "elfNN-ia64-little" 4984#define TARGET_BIG_SYM ia64_elfNN_be_vec 4985#define TARGET_BIG_NAME "elfNN-ia64-big" 4986#define ELF_ARCH bfd_arch_ia64 4987#define ELF_TARGET_ID IA64_ELF_DATA 4988#define ELF_MACHINE_CODE EM_IA_64 4989#define ELF_MACHINE_ALT1 1999 /* EAS2.3 */ 4990#define ELF_MACHINE_ALT2 1998 /* EAS2.2 */ 4991#define ELF_MAXPAGESIZE 0x10000 /* 64KB */ 4992#define ELF_COMMONPAGESIZE 0x4000 /* 16KB */ 4993 4994#define elf_backend_section_from_shdr \ 4995 elfNN_ia64_section_from_shdr 4996#define elf_backend_section_flags \ 4997 elfNN_ia64_section_flags 4998#define elf_backend_fake_sections \ 4999 elfNN_ia64_fake_sections 5000#define elf_backend_final_write_processing \ 5001 elfNN_ia64_final_write_processing 5002#define elf_backend_add_symbol_hook \ 5003 elfNN_ia64_add_symbol_hook 5004#define elf_backend_additional_program_headers \ 5005 elfNN_ia64_additional_program_headers 5006#define elf_backend_modify_segment_map \ 5007 elfNN_ia64_modify_segment_map 5008#define elf_backend_modify_program_headers \ 5009 elfNN_ia64_modify_program_headers 5010#define elf_info_to_howto \ 5011 elfNN_ia64_info_to_howto 5012 5013#define bfd_elfNN_bfd_reloc_type_lookup \ 5014 ia64_elf_reloc_type_lookup 5015#define bfd_elfNN_bfd_reloc_name_lookup \ 5016 ia64_elf_reloc_name_lookup 5017#define bfd_elfNN_bfd_is_local_label_name \ 5018 elfNN_ia64_is_local_label_name 5019#define bfd_elfNN_bfd_relax_section \ 5020 elfNN_ia64_relax_section 5021 5022#define elf_backend_object_p \ 5023 elfNN_ia64_object_p 5024 5025/* Stuff for the BFD linker: */ 5026#define bfd_elfNN_bfd_link_hash_table_create \ 5027 elfNN_ia64_hash_table_create 5028#define elf_backend_create_dynamic_sections \ 5029 elfNN_ia64_create_dynamic_sections 5030#define elf_backend_check_relocs \ 5031 elfNN_ia64_check_relocs 5032#define elf_backend_adjust_dynamic_symbol \ 5033 elfNN_ia64_adjust_dynamic_symbol 5034#define elf_backend_size_dynamic_sections \ 5035 elfNN_ia64_size_dynamic_sections 5036#define elf_backend_omit_section_dynsym \ 5037 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true) 5038#define elf_backend_relocate_section \ 5039 elfNN_ia64_relocate_section 5040#define elf_backend_finish_dynamic_symbol \ 5041 elfNN_ia64_finish_dynamic_symbol 5042#define elf_backend_finish_dynamic_sections \ 5043 elfNN_ia64_finish_dynamic_sections 5044#define bfd_elfNN_bfd_final_link \ 5045 elfNN_ia64_final_link 5046 5047#define bfd_elfNN_bfd_merge_private_bfd_data \ 5048 elfNN_ia64_merge_private_bfd_data 5049#define bfd_elfNN_bfd_set_private_flags \ 5050 elfNN_ia64_set_private_flags 5051#define bfd_elfNN_bfd_print_private_bfd_data \ 5052 elfNN_ia64_print_private_bfd_data 5053 5054#define elf_backend_plt_readonly 1 5055#define elf_backend_want_plt_sym 0 5056#define elf_backend_plt_alignment 5 5057#define elf_backend_got_header_size 0 5058#define elf_backend_want_got_plt 1 5059#define elf_backend_may_use_rel_p 1 5060#define elf_backend_may_use_rela_p 1 5061#define elf_backend_default_use_rela_p 1 5062#define elf_backend_want_dynbss 0 5063#define elf_backend_copy_indirect_symbol elfNN_ia64_hash_copy_indirect 5064#define elf_backend_hide_symbol elfNN_ia64_hash_hide_symbol 5065#define elf_backend_fixup_symbol _bfd_elf_link_hash_fixup_symbol 5066#define elf_backend_reloc_type_class elfNN_ia64_reloc_type_class 5067#define elf_backend_rela_normal 1 5068#define elf_backend_special_sections elfNN_ia64_special_sections 5069#define elf_backend_default_execstack 0 5070 5071/* FIXME: PR 290: The Intel C compiler generates SHT_IA_64_UNWIND with 5072 SHF_LINK_ORDER. But it doesn't set the sh_link or sh_info fields. 5073 We don't want to flood users with so many error messages. We turn 5074 off the warning for now. It will be turned on later when the Intel 5075 compiler is fixed. */ 5076#define elf_backend_link_order_error_handler NULL 5077 5078#include "elfNN-target.h" 5079 5080/* HPUX-specific vectors. */ 5081 5082#undef TARGET_LITTLE_SYM 5083#undef TARGET_LITTLE_NAME 5084#undef TARGET_BIG_SYM 5085#define TARGET_BIG_SYM ia64_elfNN_hpux_be_vec 5086#undef TARGET_BIG_NAME 5087#define TARGET_BIG_NAME "elfNN-ia64-hpux-big" 5088 5089/* These are HP-UX specific functions. */ 5090 5091#undef elf_backend_post_process_headers 5092#define elf_backend_post_process_headers elfNN_hpux_post_process_headers 5093 5094#undef elf_backend_section_from_bfd_section 5095#define elf_backend_section_from_bfd_section elfNN_hpux_backend_section_from_bfd_section 5096 5097#undef elf_backend_symbol_processing 5098#define elf_backend_symbol_processing elfNN_hpux_backend_symbol_processing 5099 5100#undef elf_backend_want_p_paddr_set_to_zero 5101#define elf_backend_want_p_paddr_set_to_zero 1 5102 5103#undef ELF_COMMONPAGESIZE 5104#undef ELF_OSABI 5105#define ELF_OSABI ELFOSABI_HPUX 5106 5107#undef elfNN_bed 5108#define elfNN_bed elfNN_ia64_hpux_bed 5109 5110#include "elfNN-target.h" 5111