1 /* IA-64 support for 64-bit ELF 2 Copyright (C) 1998-2016 Free Software Foundation, Inc. 3 Contributed by David Mosberger-Tang <davidm (at) 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 43 typedef 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 50 struct 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 }; 100 101 struct 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 }; 118 119 struct 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 }; 131 132 struct 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 }; 158 159 struct 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) 169 170 static 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); 174 static bfd_boolean elfNN_ia64_dynamic_symbol_p 175 (struct elf_link_hash_entry *h, struct bfd_link_info *info, int); 176 static bfd_boolean elfNN_ia64_choose_gp 177 (bfd *abfd, struct bfd_link_info *info, bfd_boolean final); 178 static 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); 182 static bfd_boolean allocate_global_data_got 183 (struct elfNN_ia64_dyn_sym_info *dyn_i, void * data); 184 static bfd_boolean allocate_global_fptr_got 185 (struct elfNN_ia64_dyn_sym_info *dyn_i, void * data); 186 static bfd_boolean allocate_local_got 187 (struct elfNN_ia64_dyn_sym_info *dyn_i, void * data); 188 static bfd_boolean elfNN_ia64_hpux_vec 189 (const bfd_target *vec); 190 static bfd_boolean allocate_dynrel_entries 191 (struct elfNN_ia64_dyn_sym_info *dyn_i, void * data); 192 static 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. */ 198 199 /* Given a ELF reloc, return the matching HOWTO structure. */ 200 201 static void 202 elfNN_ia64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, 203 arelent *bfd_reloc, 204 Elf_Internal_Rela *elf_reloc) 205 { 206 bfd_reloc->howto 207 = ia64_elf_lookup_howto ((unsigned int) ELFNN_R_TYPE (elf_reloc->r_info)); 208 } 209 210 #define PLT_HEADER_SIZE (3 * 16) 212 #define PLT_MIN_ENTRY_SIZE (1 * 16) 213 #define PLT_FULL_ENTRY_SIZE (2 * 16) 214 #define PLT_RESERVED_WORDS 3 215 216 static const bfd_byte plt_header[PLT_HEADER_SIZE] = 217 { 218 0x0b, 0x10, 0x00, 0x1c, 0x00, 0x21, /* [MMI] mov r2=r14;; */ 219 0xe0, 0x00, 0x08, 0x00, 0x48, 0x00, /* addl r14=0,r2 */ 220 0x00, 0x00, 0x04, 0x00, /* nop.i 0x0;; */ 221 0x0b, 0x80, 0x20, 0x1c, 0x18, 0x14, /* [MMI] ld8 r16=[r14],8;; */ 222 0x10, 0x41, 0x38, 0x30, 0x28, 0x00, /* ld8 r17=[r14],8 */ 223 0x00, 0x00, 0x04, 0x00, /* nop.i 0x0;; */ 224 0x11, 0x08, 0x00, 0x1c, 0x18, 0x10, /* [MIB] ld8 r1=[r14] */ 225 0x60, 0x88, 0x04, 0x80, 0x03, 0x00, /* mov b6=r17 */ 226 0x60, 0x00, 0x80, 0x00 /* br.few b6;; */ 227 }; 228 229 static const bfd_byte plt_min_entry[PLT_MIN_ENTRY_SIZE] = 230 { 231 0x11, 0x78, 0x00, 0x00, 0x00, 0x24, /* [MIB] mov r15=0 */ 232 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, /* nop.i 0x0 */ 233 0x00, 0x00, 0x00, 0x40 /* br.few 0 <PLT0>;; */ 234 }; 235 236 static const bfd_byte plt_full_entry[PLT_FULL_ENTRY_SIZE] = 237 { 238 0x0b, 0x78, 0x00, 0x02, 0x00, 0x24, /* [MMI] addl r15=0,r1;; */ 239 0x00, 0x41, 0x3c, 0x70, 0x29, 0xc0, /* ld8.acq r16=[r15],8*/ 240 0x01, 0x08, 0x00, 0x84, /* mov r14=r1;; */ 241 0x11, 0x08, 0x00, 0x1e, 0x18, 0x10, /* [MIB] ld8 r1=[r15] */ 242 0x60, 0x80, 0x04, 0x80, 0x03, 0x00, /* mov b6=r16 */ 243 0x60, 0x00, 0x80, 0x00 /* br.few b6;; */ 244 }; 245 246 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" 247 248 static const bfd_byte oor_brl[16] = 249 { 250 0x05, 0x00, 0x00, 0x00, 0x01, 0x00, /* [MLX] nop.m 0 */ 251 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* brl.sptk.few tgt;; */ 252 0x00, 0x00, 0x00, 0xc0 253 }; 254 255 static const bfd_byte oor_ip[48] = 256 { 257 0x04, 0x00, 0x00, 0x00, 0x01, 0x00, /* [MLX] nop.m 0 */ 258 0x00, 0x00, 0x00, 0x00, 0x00, 0xe0, /* movl r15=0 */ 259 0x01, 0x00, 0x00, 0x60, 260 0x03, 0x00, 0x00, 0x00, 0x01, 0x00, /* [MII] nop.m 0 */ 261 0x00, 0x01, 0x00, 0x60, 0x00, 0x00, /* mov r16=ip;; */ 262 0xf2, 0x80, 0x00, 0x80, /* add r16=r15,r16;; */ 263 0x11, 0x00, 0x00, 0x00, 0x01, 0x00, /* [MIB] nop.m 0 */ 264 0x60, 0x80, 0x04, 0x80, 0x03, 0x00, /* mov b6=r16 */ 265 0x60, 0x00, 0x80, 0x00 /* br b6;; */ 266 }; 267 268 static size_t oor_branch_size = sizeof (oor_brl); 269 270 void 271 bfd_elfNN_ia64_after_parse (int itanium) 272 { 273 oor_branch_size = itanium ? sizeof (oor_ip) : sizeof (oor_brl); 274 } 275 276 278 /* Rename some of the generic section flags to better document how they 279 are used here. */ 280 #define skip_relax_pass_0 sec_flg0 281 #define skip_relax_pass_1 sec_flg1 282 283 /* These functions do relaxation for IA-64 ELF. */ 284 285 static void 286 elfNN_ia64_update_short_info (asection *sec, bfd_vma offset, 287 struct elfNN_ia64_link_hash_table *ia64_info) 288 { 289 /* Skip ABS and SHF_IA_64_SHORT sections. */ 290 if (sec == bfd_abs_section_ptr 291 || (sec->flags & SEC_SMALL_DATA) != 0) 292 return; 293 294 if (!ia64_info->min_short_sec) 295 { 296 ia64_info->max_short_sec = sec; 297 ia64_info->max_short_offset = offset; 298 ia64_info->min_short_sec = sec; 299 ia64_info->min_short_offset = offset; 300 } 301 else if (sec == ia64_info->max_short_sec 302 && offset > ia64_info->max_short_offset) 303 ia64_info->max_short_offset = offset; 304 else if (sec == ia64_info->min_short_sec 305 && offset < ia64_info->min_short_offset) 306 ia64_info->min_short_offset = offset; 307 else if (sec->output_section->vma 308 > ia64_info->max_short_sec->vma) 309 { 310 ia64_info->max_short_sec = sec; 311 ia64_info->max_short_offset = offset; 312 } 313 else if (sec->output_section->vma 314 < ia64_info->min_short_sec->vma) 315 { 316 ia64_info->min_short_sec = sec; 317 ia64_info->min_short_offset = offset; 318 } 319 } 320 321 static bfd_boolean 322 elfNN_ia64_relax_section (bfd *abfd, asection *sec, 323 struct bfd_link_info *link_info, 324 bfd_boolean *again) 325 { 326 struct one_fixup 327 { 328 struct one_fixup *next; 329 asection *tsec; 330 bfd_vma toff; 331 bfd_vma trampoff; 332 }; 333 334 Elf_Internal_Shdr *symtab_hdr; 335 Elf_Internal_Rela *internal_relocs; 336 Elf_Internal_Rela *irel, *irelend; 337 bfd_byte *contents; 338 Elf_Internal_Sym *isymbuf = NULL; 339 struct elfNN_ia64_link_hash_table *ia64_info; 340 struct one_fixup *fixups = NULL; 341 bfd_boolean changed_contents = FALSE; 342 bfd_boolean changed_relocs = FALSE; 343 bfd_boolean changed_got = FALSE; 344 bfd_boolean skip_relax_pass_0 = TRUE; 345 bfd_boolean skip_relax_pass_1 = TRUE; 346 bfd_vma gp = 0; 347 348 /* Assume we're not going to change any sizes, and we'll only need 349 one pass. */ 350 *again = FALSE; 351 352 if (bfd_link_relocatable (link_info)) 353 (*link_info->callbacks->einfo) 354 (_("%P%F: --relax and -r may not be used together\n")); 355 356 /* Don't even try to relax for non-ELF outputs. */ 357 if (!is_elf_hash_table (link_info->hash)) 358 return FALSE; 359 360 /* Nothing to do if there are no relocations or there is no need for 361 the current pass. */ 362 if ((sec->flags & SEC_RELOC) == 0 363 || sec->reloc_count == 0 364 || (link_info->relax_pass == 0 && sec->skip_relax_pass_0) 365 || (link_info->relax_pass == 1 && sec->skip_relax_pass_1)) 366 return TRUE; 367 368 ia64_info = elfNN_ia64_hash_table (link_info); 369 if (ia64_info == NULL) 370 return FALSE; 371 372 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 373 374 /* Load the relocations for this section. */ 375 internal_relocs = (_bfd_elf_link_read_relocs 376 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL, 377 link_info->keep_memory)); 378 if (internal_relocs == NULL) 379 return FALSE; 380 381 irelend = internal_relocs + sec->reloc_count; 382 383 /* Get the section contents. */ 384 if (elf_section_data (sec)->this_hdr.contents != NULL) 385 contents = elf_section_data (sec)->this_hdr.contents; 386 else 387 { 388 if (!bfd_malloc_and_get_section (abfd, sec, &contents)) 389 goto error_return; 390 } 391 392 for (irel = internal_relocs; irel < irelend; irel++) 393 { 394 unsigned long r_type = ELFNN_R_TYPE (irel->r_info); 395 bfd_vma symaddr, reladdr, trampoff, toff, roff; 396 asection *tsec; 397 struct one_fixup *f; 398 bfd_size_type amt; 399 bfd_boolean is_branch; 400 struct elfNN_ia64_dyn_sym_info *dyn_i; 401 char symtype; 402 403 switch (r_type) 404 { 405 case R_IA64_PCREL21B: 406 case R_IA64_PCREL21BI: 407 case R_IA64_PCREL21M: 408 case R_IA64_PCREL21F: 409 /* In pass 1, all br relaxations are done. We can skip it. */ 410 if (link_info->relax_pass == 1) 411 continue; 412 skip_relax_pass_0 = FALSE; 413 is_branch = TRUE; 414 break; 415 416 case R_IA64_PCREL60B: 417 /* We can't optimize brl to br in pass 0 since br relaxations 418 will increase the code size. Defer it to pass 1. */ 419 if (link_info->relax_pass == 0) 420 { 421 skip_relax_pass_1 = FALSE; 422 continue; 423 } 424 is_branch = TRUE; 425 break; 426 427 case R_IA64_GPREL22: 428 /* Update max_short_sec/min_short_sec. */ 429 430 case R_IA64_LTOFF22X: 431 case R_IA64_LDXMOV: 432 /* We can't relax ldx/mov in pass 0 since br relaxations will 433 increase the code size. Defer it to pass 1. */ 434 if (link_info->relax_pass == 0) 435 { 436 skip_relax_pass_1 = FALSE; 437 continue; 438 } 439 is_branch = FALSE; 440 break; 441 442 default: 443 continue; 444 } 445 446 /* Get the value of the symbol referred to by the reloc. */ 447 if (ELFNN_R_SYM (irel->r_info) < symtab_hdr->sh_info) 448 { 449 /* A local symbol. */ 450 Elf_Internal_Sym *isym; 451 452 /* Read this BFD's local symbols. */ 453 if (isymbuf == NULL) 454 { 455 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; 456 if (isymbuf == NULL) 457 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, 458 symtab_hdr->sh_info, 0, 459 NULL, NULL, NULL); 460 if (isymbuf == 0) 461 goto error_return; 462 } 463 464 isym = isymbuf + ELFNN_R_SYM (irel->r_info); 465 if (isym->st_shndx == SHN_UNDEF) 466 continue; /* We can't do anything with undefined symbols. */ 467 else if (isym->st_shndx == SHN_ABS) 468 tsec = bfd_abs_section_ptr; 469 else if (isym->st_shndx == SHN_COMMON) 470 tsec = bfd_com_section_ptr; 471 else if (isym->st_shndx == SHN_IA_64_ANSI_COMMON) 472 tsec = bfd_com_section_ptr; 473 else 474 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx); 475 476 toff = isym->st_value; 477 dyn_i = get_dyn_sym_info (ia64_info, NULL, abfd, irel, FALSE); 478 symtype = ELF_ST_TYPE (isym->st_info); 479 } 480 else 481 { 482 unsigned long indx; 483 struct elf_link_hash_entry *h; 484 485 indx = ELFNN_R_SYM (irel->r_info) - symtab_hdr->sh_info; 486 h = elf_sym_hashes (abfd)[indx]; 487 BFD_ASSERT (h != NULL); 488 489 while (h->root.type == bfd_link_hash_indirect 490 || h->root.type == bfd_link_hash_warning) 491 h = (struct elf_link_hash_entry *) h->root.u.i.link; 492 493 dyn_i = get_dyn_sym_info (ia64_info, h, abfd, irel, FALSE); 494 495 /* For branches to dynamic symbols, we're interested instead 496 in a branch to the PLT entry. */ 497 if (is_branch && dyn_i && dyn_i->want_plt2) 498 { 499 /* Internal branches shouldn't be sent to the PLT. 500 Leave this for now and we'll give an error later. */ 501 if (r_type != R_IA64_PCREL21B) 502 continue; 503 504 tsec = ia64_info->root.splt; 505 toff = dyn_i->plt2_offset; 506 BFD_ASSERT (irel->r_addend == 0); 507 } 508 509 /* Can't do anything else with dynamic symbols. */ 510 else if (elfNN_ia64_dynamic_symbol_p (h, link_info, r_type)) 511 continue; 512 513 else 514 { 515 /* We can't do anything with undefined symbols. */ 516 if (h->root.type == bfd_link_hash_undefined 517 || h->root.type == bfd_link_hash_undefweak) 518 continue; 519 520 tsec = h->root.u.def.section; 521 toff = h->root.u.def.value; 522 } 523 524 symtype = h->type; 525 } 526 527 if (tsec->sec_info_type == SEC_INFO_TYPE_MERGE) 528 { 529 /* At this stage in linking, no SEC_MERGE symbol has been 530 adjusted, so all references to such symbols need to be 531 passed through _bfd_merged_section_offset. (Later, in 532 relocate_section, all SEC_MERGE symbols *except* for 533 section symbols have been adjusted.) 534 535 gas may reduce relocations against symbols in SEC_MERGE 536 sections to a relocation against the section symbol when 537 the original addend was zero. When the reloc is against 538 a section symbol we should include the addend in the 539 offset passed to _bfd_merged_section_offset, since the 540 location of interest is the original symbol. On the 541 other hand, an access to "sym+addend" where "sym" is not 542 a section symbol should not include the addend; Such an 543 access is presumed to be an offset from "sym"; The 544 location of interest is just "sym". */ 545 if (symtype == STT_SECTION) 546 toff += irel->r_addend; 547 548 toff = _bfd_merged_section_offset (abfd, &tsec, 549 elf_section_data (tsec)->sec_info, 550 toff); 551 552 if (symtype != STT_SECTION) 553 toff += irel->r_addend; 554 } 555 else 556 toff += irel->r_addend; 557 558 symaddr = tsec->output_section->vma + tsec->output_offset + toff; 559 560 roff = irel->r_offset; 561 562 if (is_branch) 563 { 564 bfd_signed_vma offset; 565 566 reladdr = (sec->output_section->vma 567 + sec->output_offset 568 + roff) & (bfd_vma) -4; 569 570 /* The .plt section is aligned at 32byte and the .text section 571 is aligned at 64byte. The .text section is right after the 572 .plt section. After the first relaxation pass, linker may 573 increase the gap between the .plt and .text sections up 574 to 32byte. We assume linker will always insert 32byte 575 between the .plt and .text sections after the first 576 relaxation pass. */ 577 if (tsec == ia64_info->root.splt) 578 offset = -0x1000000 + 32; 579 else 580 offset = -0x1000000; 581 582 /* If the branch is in range, no need to do anything. */ 583 if ((bfd_signed_vma) (symaddr - reladdr) >= offset 584 && (bfd_signed_vma) (symaddr - reladdr) <= 0x0FFFFF0) 585 { 586 /* If the 60-bit branch is in 21-bit range, optimize it. */ 587 if (r_type == R_IA64_PCREL60B) 588 { 589 ia64_elf_relax_brl (contents, roff); 590 591 irel->r_info 592 = ELFNN_R_INFO (ELFNN_R_SYM (irel->r_info), 593 R_IA64_PCREL21B); 594 595 /* If the original relocation offset points to slot 596 1, change it to slot 2. */ 597 if ((irel->r_offset & 3) == 1) 598 irel->r_offset += 1; 599 } 600 601 continue; 602 } 603 else if (r_type == R_IA64_PCREL60B) 604 continue; 605 else if (ia64_elf_relax_br (contents, roff)) 606 { 607 irel->r_info 608 = ELFNN_R_INFO (ELFNN_R_SYM (irel->r_info), 609 R_IA64_PCREL60B); 610 611 /* Make the relocation offset point to slot 1. */ 612 irel->r_offset = (irel->r_offset & ~((bfd_vma) 0x3)) + 1; 613 continue; 614 } 615 616 /* We can't put a trampoline in a .init/.fini section. Issue 617 an error. */ 618 if (strcmp (sec->output_section->name, ".init") == 0 619 || strcmp (sec->output_section->name, ".fini") == 0) 620 { 621 (*_bfd_error_handler) 622 (_("%B: Can't relax br at 0x%lx in section `%A'. Please use brl or indirect branch."), 623 sec->owner, sec, (unsigned long) roff); 624 bfd_set_error (bfd_error_bad_value); 625 goto error_return; 626 } 627 628 /* If the branch and target are in the same section, you've 629 got one honking big section and we can't help you unless 630 you are branching backwards. You'll get an error message 631 later. */ 632 if (tsec == sec && toff > roff) 633 continue; 634 635 /* Look for an existing fixup to this address. */ 636 for (f = fixups; f ; f = f->next) 637 if (f->tsec == tsec && f->toff == toff) 638 break; 639 640 if (f == NULL) 641 { 642 /* Two alternatives: If it's a branch to a PLT entry, we can 643 make a copy of the FULL_PLT entry. Otherwise, we'll have 644 to use a `brl' insn to get where we're going. */ 645 646 size_t size; 647 648 if (tsec == ia64_info->root.splt) 649 size = sizeof (plt_full_entry); 650 else 651 size = oor_branch_size; 652 653 /* Resize the current section to make room for the new branch. */ 654 trampoff = (sec->size + 15) & (bfd_vma) -16; 655 656 /* If trampoline is out of range, there is nothing we 657 can do. */ 658 offset = trampoff - (roff & (bfd_vma) -4); 659 if (offset < -0x1000000 || offset > 0x0FFFFF0) 660 continue; 661 662 amt = trampoff + size; 663 contents = (bfd_byte *) bfd_realloc (contents, amt); 664 if (contents == NULL) 665 goto error_return; 666 sec->size = amt; 667 668 if (tsec == ia64_info->root.splt) 669 { 670 memcpy (contents + trampoff, plt_full_entry, size); 671 672 /* Hijack the old relocation for use as the PLTOFF reloc. */ 673 irel->r_info = ELFNN_R_INFO (ELFNN_R_SYM (irel->r_info), 674 R_IA64_PLTOFF22); 675 irel->r_offset = trampoff; 676 } 677 else 678 { 679 if (size == sizeof (oor_ip)) 680 { 681 memcpy (contents + trampoff, oor_ip, size); 682 irel->r_info = ELFNN_R_INFO (ELFNN_R_SYM (irel->r_info), 683 R_IA64_PCREL64I); 684 irel->r_addend -= 16; 685 irel->r_offset = trampoff + 2; 686 } 687 else 688 { 689 memcpy (contents + trampoff, oor_brl, size); 690 irel->r_info = ELFNN_R_INFO (ELFNN_R_SYM (irel->r_info), 691 R_IA64_PCREL60B); 692 irel->r_offset = trampoff + 2; 693 } 694 695 } 696 697 /* Record the fixup so we don't do it again this section. */ 698 f = (struct one_fixup *) 699 bfd_malloc ((bfd_size_type) sizeof (*f)); 700 f->next = fixups; 701 f->tsec = tsec; 702 f->toff = toff; 703 f->trampoff = trampoff; 704 fixups = f; 705 } 706 else 707 { 708 /* If trampoline is out of range, there is nothing we 709 can do. */ 710 offset = f->trampoff - (roff & (bfd_vma) -4); 711 if (offset < -0x1000000 || offset > 0x0FFFFF0) 712 continue; 713 714 /* Nop out the reloc, since we're finalizing things here. */ 715 irel->r_info = ELFNN_R_INFO (0, R_IA64_NONE); 716 } 717 718 /* Fix up the existing branch to hit the trampoline. */ 719 if (ia64_elf_install_value (contents + roff, offset, r_type) 720 != bfd_reloc_ok) 721 goto error_return; 722 723 changed_contents = TRUE; 724 changed_relocs = TRUE; 725 } 726 else 727 { 728 /* Fetch the gp. */ 729 if (gp == 0) 730 { 731 bfd *obfd = sec->output_section->owner; 732 gp = _bfd_get_gp_value (obfd); 733 if (gp == 0) 734 { 735 if (!elfNN_ia64_choose_gp (obfd, link_info, FALSE)) 736 goto error_return; 737 gp = _bfd_get_gp_value (obfd); 738 } 739 } 740 741 /* If the data is out of range, do nothing. */ 742 if ((bfd_signed_vma) (symaddr - gp) >= 0x200000 743 ||(bfd_signed_vma) (symaddr - gp) < -0x200000) 744 continue; 745 746 if (r_type == R_IA64_GPREL22) 747 elfNN_ia64_update_short_info (tsec->output_section, 748 tsec->output_offset + toff, 749 ia64_info); 750 else if (r_type == R_IA64_LTOFF22X) 751 { 752 irel->r_info = ELFNN_R_INFO (ELFNN_R_SYM (irel->r_info), 753 R_IA64_GPREL22); 754 changed_relocs = TRUE; 755 if (dyn_i->want_gotx) 756 { 757 dyn_i->want_gotx = 0; 758 changed_got |= !dyn_i->want_got; 759 } 760 761 elfNN_ia64_update_short_info (tsec->output_section, 762 tsec->output_offset + toff, 763 ia64_info); 764 } 765 else 766 { 767 ia64_elf_relax_ldxmov (contents, roff); 768 irel->r_info = ELFNN_R_INFO (0, R_IA64_NONE); 769 changed_contents = TRUE; 770 changed_relocs = TRUE; 771 } 772 } 773 } 774 775 /* ??? If we created fixups, this may push the code segment large 776 enough that the data segment moves, which will change the GP. 777 Reset the GP so that we re-calculate next round. We need to 778 do this at the _beginning_ of the next round; now will not do. */ 779 780 /* Clean up and go home. */ 781 while (fixups) 782 { 783 struct one_fixup *f = fixups; 784 fixups = fixups->next; 785 free (f); 786 } 787 788 if (isymbuf != NULL 789 && symtab_hdr->contents != (unsigned char *) isymbuf) 790 { 791 if (! link_info->keep_memory) 792 free (isymbuf); 793 else 794 { 795 /* Cache the symbols for elf_link_input_bfd. */ 796 symtab_hdr->contents = (unsigned char *) isymbuf; 797 } 798 } 799 800 if (contents != NULL 801 && elf_section_data (sec)->this_hdr.contents != contents) 802 { 803 if (!changed_contents && !link_info->keep_memory) 804 free (contents); 805 else 806 { 807 /* Cache the section contents for elf_link_input_bfd. */ 808 elf_section_data (sec)->this_hdr.contents = contents; 809 } 810 } 811 812 if (elf_section_data (sec)->relocs != internal_relocs) 813 { 814 if (!changed_relocs) 815 free (internal_relocs); 816 else 817 elf_section_data (sec)->relocs = internal_relocs; 818 } 819 820 if (changed_got) 821 { 822 struct elfNN_ia64_allocate_data data; 823 data.info = link_info; 824 data.ofs = 0; 825 ia64_info->self_dtpmod_offset = (bfd_vma) -1; 826 827 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_global_data_got, &data); 828 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_global_fptr_got, &data); 829 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_local_got, &data); 830 ia64_info->root.sgot->size = data.ofs; 831 832 if (ia64_info->root.dynamic_sections_created 833 && ia64_info->root.srelgot != NULL) 834 { 835 /* Resize .rela.got. */ 836 ia64_info->root.srelgot->size = 0; 837 if (bfd_link_pic (link_info) 838 && ia64_info->self_dtpmod_offset != (bfd_vma) -1) 839 ia64_info->root.srelgot->size += sizeof (ElfNN_External_Rela); 840 data.only_got = TRUE; 841 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_dynrel_entries, 842 &data); 843 } 844 } 845 846 if (link_info->relax_pass == 0) 847 { 848 /* Pass 0 is only needed to relax br. */ 849 sec->skip_relax_pass_0 = skip_relax_pass_0; 850 sec->skip_relax_pass_1 = skip_relax_pass_1; 851 } 852 853 *again = changed_contents || changed_relocs; 854 return TRUE; 855 856 error_return: 857 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents) 858 free (isymbuf); 859 if (contents != NULL 860 && elf_section_data (sec)->this_hdr.contents != contents) 861 free (contents); 862 if (internal_relocs != NULL 863 && elf_section_data (sec)->relocs != internal_relocs) 864 free (internal_relocs); 865 return FALSE; 866 } 867 #undef skip_relax_pass_0 868 #undef skip_relax_pass_1 869 870 /* Return TRUE if NAME is an unwind table section name. */ 872 873 static inline bfd_boolean 874 is_unwind_section_name (bfd *abfd, const char *name) 875 { 876 if (elfNN_ia64_hpux_vec (abfd->xvec) 877 && !strcmp (name, ELF_STRING_ia64_unwind_hdr)) 878 return FALSE; 879 880 return ((CONST_STRNEQ (name, ELF_STRING_ia64_unwind) 881 && ! CONST_STRNEQ (name, ELF_STRING_ia64_unwind_info)) 882 || CONST_STRNEQ (name, ELF_STRING_ia64_unwind_once)); 883 } 884 885 /* Handle an IA-64 specific section when reading an object file. This 886 is called when bfd_section_from_shdr finds a section with an unknown 887 type. */ 888 889 static bfd_boolean 890 elfNN_ia64_section_from_shdr (bfd *abfd, 891 Elf_Internal_Shdr *hdr, 892 const char *name, 893 int shindex) 894 { 895 /* There ought to be a place to keep ELF backend specific flags, but 896 at the moment there isn't one. We just keep track of the 897 sections by their name, instead. Fortunately, the ABI gives 898 suggested names for all the MIPS specific sections, so we will 899 probably get away with this. */ 900 switch (hdr->sh_type) 901 { 902 case SHT_IA_64_UNWIND: 903 case SHT_IA_64_HP_OPT_ANOT: 904 break; 905 906 case SHT_IA_64_EXT: 907 if (strcmp (name, ELF_STRING_ia64_archext) != 0) 908 return FALSE; 909 break; 910 911 default: 912 return FALSE; 913 } 914 915 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) 916 return FALSE; 917 918 return TRUE; 919 } 920 921 /* Convert IA-64 specific section flags to bfd internal section flags. */ 922 923 /* ??? There is no bfd internal flag equivalent to the SHF_IA_64_NORECOV 924 flag. */ 925 926 static bfd_boolean 927 elfNN_ia64_section_flags (flagword *flags, 928 const Elf_Internal_Shdr *hdr) 929 { 930 if (hdr->sh_flags & SHF_IA_64_SHORT) 931 *flags |= SEC_SMALL_DATA; 932 933 return TRUE; 934 } 935 936 /* Set the correct type for an IA-64 ELF section. We do this by the 937 section name, which is a hack, but ought to work. */ 938 939 static bfd_boolean 940 elfNN_ia64_fake_sections (bfd *abfd, Elf_Internal_Shdr *hdr, 941 asection *sec) 942 { 943 const char *name; 944 945 name = bfd_get_section_name (abfd, sec); 946 947 if (is_unwind_section_name (abfd, name)) 948 { 949 /* We don't have the sections numbered at this point, so sh_info 950 is set later, in elfNN_ia64_final_write_processing. */ 951 hdr->sh_type = SHT_IA_64_UNWIND; 952 hdr->sh_flags |= SHF_LINK_ORDER; 953 } 954 else if (strcmp (name, ELF_STRING_ia64_archext) == 0) 955 hdr->sh_type = SHT_IA_64_EXT; 956 else if (strcmp (name, ".HP.opt_annot") == 0) 957 hdr->sh_type = SHT_IA_64_HP_OPT_ANOT; 958 else if (strcmp (name, ".reloc") == 0) 959 /* This is an ugly, but unfortunately necessary hack that is 960 needed when producing EFI binaries on IA-64. It tells 961 elf.c:elf_fake_sections() not to consider ".reloc" as a section 962 containing ELF relocation info. We need this hack in order to 963 be able to generate ELF binaries that can be translated into 964 EFI applications (which are essentially COFF objects). Those 965 files contain a COFF ".reloc" section inside an ELFNN object, 966 which would normally cause BFD to segfault because it would 967 attempt to interpret this section as containing relocation 968 entries for section "oc". With this hack enabled, ".reloc" 969 will be treated as a normal data section, which will avoid the 970 segfault. However, you won't be able to create an ELFNN binary 971 with a section named "oc" that needs relocations, but that's 972 the kind of ugly side-effects you get when detecting section 973 types based on their names... In practice, this limitation is 974 unlikely to bite. */ 975 hdr->sh_type = SHT_PROGBITS; 976 977 if (sec->flags & SEC_SMALL_DATA) 978 hdr->sh_flags |= SHF_IA_64_SHORT; 979 980 /* Some HP linkers look for the SHF_IA_64_HP_TLS flag instead of SHF_TLS. */ 981 982 if (elfNN_ia64_hpux_vec (abfd->xvec) && (sec->flags & SHF_TLS)) 983 hdr->sh_flags |= SHF_IA_64_HP_TLS; 984 985 return TRUE; 986 } 987 988 /* The final processing done just before writing out an IA-64 ELF 989 object file. */ 990 991 static void 992 elfNN_ia64_final_write_processing (bfd *abfd, 993 bfd_boolean linker ATTRIBUTE_UNUSED) 994 { 995 Elf_Internal_Shdr *hdr; 996 asection *s; 997 998 for (s = abfd->sections; s; s = s->next) 999 { 1000 hdr = &elf_section_data (s)->this_hdr; 1001 switch (hdr->sh_type) 1002 { 1003 case SHT_IA_64_UNWIND: 1004 /* The IA-64 processor-specific ABI requires setting sh_link 1005 to the unwind section, whereas HP-UX requires sh_info to 1006 do so. For maximum compatibility, we'll set both for 1007 now... */ 1008 hdr->sh_info = hdr->sh_link; 1009 break; 1010 } 1011 } 1012 1013 if (! elf_flags_init (abfd)) 1014 { 1015 unsigned long flags = 0; 1016 1017 if (abfd->xvec->byteorder == BFD_ENDIAN_BIG) 1018 flags |= EF_IA_64_BE; 1019 if (bfd_get_mach (abfd) == bfd_mach_ia64_elf64) 1020 flags |= EF_IA_64_ABI64; 1021 1022 elf_elfheader(abfd)->e_flags = flags; 1023 elf_flags_init (abfd) = TRUE; 1024 } 1025 } 1026 1027 /* Hook called by the linker routine which adds symbols from an object 1028 file. We use it to put .comm items in .sbss, and not .bss. */ 1029 1030 static bfd_boolean 1031 elfNN_ia64_add_symbol_hook (bfd *abfd, 1032 struct bfd_link_info *info, 1033 Elf_Internal_Sym *sym, 1034 const char **namep ATTRIBUTE_UNUSED, 1035 flagword *flagsp ATTRIBUTE_UNUSED, 1036 asection **secp, 1037 bfd_vma *valp) 1038 { 1039 if (sym->st_shndx == SHN_COMMON 1040 && !bfd_link_relocatable (info) 1041 && sym->st_size <= elf_gp_size (abfd)) 1042 { 1043 /* Common symbols less than or equal to -G nn bytes are 1044 automatically put into .sbss. */ 1045 1046 asection *scomm = bfd_get_section_by_name (abfd, ".scommon"); 1047 1048 if (scomm == NULL) 1049 { 1050 scomm = bfd_make_section_with_flags (abfd, ".scommon", 1051 (SEC_ALLOC 1052 | SEC_IS_COMMON 1053 | SEC_LINKER_CREATED)); 1054 if (scomm == NULL) 1055 return FALSE; 1056 } 1057 1058 *secp = scomm; 1059 *valp = sym->st_size; 1060 } 1061 1062 return TRUE; 1063 } 1064 1065 /* Return the number of additional phdrs we will need. */ 1066 1067 static int 1068 elfNN_ia64_additional_program_headers (bfd *abfd, 1069 struct bfd_link_info *info ATTRIBUTE_UNUSED) 1070 { 1071 asection *s; 1072 int ret = 0; 1073 1074 /* See if we need a PT_IA_64_ARCHEXT segment. */ 1075 s = bfd_get_section_by_name (abfd, ELF_STRING_ia64_archext); 1076 if (s && (s->flags & SEC_LOAD)) 1077 ++ret; 1078 1079 /* Count how many PT_IA_64_UNWIND segments we need. */ 1080 for (s = abfd->sections; s; s = s->next) 1081 if (is_unwind_section_name (abfd, s->name) && (s->flags & SEC_LOAD)) 1082 ++ret; 1083 1084 return ret; 1085 } 1086 1087 static bfd_boolean 1088 elfNN_ia64_modify_segment_map (bfd *abfd, 1089 struct bfd_link_info *info ATTRIBUTE_UNUSED) 1090 { 1091 struct elf_segment_map *m, **pm; 1092 Elf_Internal_Shdr *hdr; 1093 asection *s; 1094 1095 /* If we need a PT_IA_64_ARCHEXT segment, it must come before 1096 all PT_LOAD segments. */ 1097 s = bfd_get_section_by_name (abfd, ELF_STRING_ia64_archext); 1098 if (s && (s->flags & SEC_LOAD)) 1099 { 1100 for (m = elf_seg_map (abfd); m != NULL; m = m->next) 1101 if (m->p_type == PT_IA_64_ARCHEXT) 1102 break; 1103 if (m == NULL) 1104 { 1105 m = ((struct elf_segment_map *) 1106 bfd_zalloc (abfd, (bfd_size_type) sizeof *m)); 1107 if (m == NULL) 1108 return FALSE; 1109 1110 m->p_type = PT_IA_64_ARCHEXT; 1111 m->count = 1; 1112 m->sections[0] = s; 1113 1114 /* We want to put it after the PHDR and INTERP segments. */ 1115 pm = &elf_seg_map (abfd); 1116 while (*pm != NULL 1117 && ((*pm)->p_type == PT_PHDR 1118 || (*pm)->p_type == PT_INTERP)) 1119 pm = &(*pm)->next; 1120 1121 m->next = *pm; 1122 *pm = m; 1123 } 1124 } 1125 1126 /* Install PT_IA_64_UNWIND segments, if needed. */ 1127 for (s = abfd->sections; s; s = s->next) 1128 { 1129 hdr = &elf_section_data (s)->this_hdr; 1130 if (hdr->sh_type != SHT_IA_64_UNWIND) 1131 continue; 1132 1133 if (s && (s->flags & SEC_LOAD)) 1134 { 1135 for (m = elf_seg_map (abfd); m != NULL; m = m->next) 1136 if (m->p_type == PT_IA_64_UNWIND) 1137 { 1138 int i; 1139 1140 /* Look through all sections in the unwind segment 1141 for a match since there may be multiple sections 1142 to a segment. */ 1143 for (i = m->count - 1; i >= 0; --i) 1144 if (m->sections[i] == s) 1145 break; 1146 1147 if (i >= 0) 1148 break; 1149 } 1150 1151 if (m == NULL) 1152 { 1153 m = ((struct elf_segment_map *) 1154 bfd_zalloc (abfd, (bfd_size_type) sizeof *m)); 1155 if (m == NULL) 1156 return FALSE; 1157 1158 m->p_type = PT_IA_64_UNWIND; 1159 m->count = 1; 1160 m->sections[0] = s; 1161 m->next = NULL; 1162 1163 /* We want to put it last. */ 1164 pm = &elf_seg_map (abfd); 1165 while (*pm != NULL) 1166 pm = &(*pm)->next; 1167 *pm = m; 1168 } 1169 } 1170 } 1171 1172 return TRUE; 1173 } 1174 1175 /* Turn on PF_IA_64_NORECOV if needed. This involves traversing all of 1176 the input sections for each output section in the segment and testing 1177 for SHF_IA_64_NORECOV on each. */ 1178 1179 static bfd_boolean 1180 elfNN_ia64_modify_program_headers (bfd *abfd, 1181 struct bfd_link_info *info ATTRIBUTE_UNUSED) 1182 { 1183 struct elf_obj_tdata *tdata = elf_tdata (abfd); 1184 struct elf_segment_map *m; 1185 Elf_Internal_Phdr *p; 1186 1187 for (p = tdata->phdr, m = elf_seg_map (abfd); m != NULL; m = m->next, p++) 1188 if (m->p_type == PT_LOAD) 1189 { 1190 int i; 1191 for (i = m->count - 1; i >= 0; --i) 1192 { 1193 struct bfd_link_order *order = m->sections[i]->map_head.link_order; 1194 1195 while (order != NULL) 1196 { 1197 if (order->type == bfd_indirect_link_order) 1198 { 1199 asection *is = order->u.indirect.section; 1200 bfd_vma flags = elf_section_data(is)->this_hdr.sh_flags; 1201 if (flags & SHF_IA_64_NORECOV) 1202 { 1203 p->p_flags |= PF_IA_64_NORECOV; 1204 goto found; 1205 } 1206 } 1207 order = order->next; 1208 } 1209 } 1210 found:; 1211 } 1212 1213 return TRUE; 1214 } 1215 1216 /* According to the Tahoe assembler spec, all labels starting with a 1217 '.' are local. */ 1218 1219 static bfd_boolean 1220 elfNN_ia64_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED, 1221 const char *name) 1222 { 1223 return name[0] == '.'; 1224 } 1225 1226 /* Should we do dynamic things to this symbol? */ 1227 1228 static bfd_boolean 1229 elfNN_ia64_dynamic_symbol_p (struct elf_link_hash_entry *h, 1230 struct bfd_link_info *info, int r_type) 1231 { 1232 bfd_boolean ignore_protected 1233 = ((r_type & 0xf8) == 0x40 /* FPTR relocs */ 1234 || (r_type & 0xf8) == 0x50); /* LTOFF_FPTR relocs */ 1235 1236 return _bfd_elf_dynamic_symbol_p (h, info, ignore_protected); 1237 } 1238 1239 static struct bfd_hash_entry* 1241 elfNN_ia64_new_elf_hash_entry (struct bfd_hash_entry *entry, 1242 struct bfd_hash_table *table, 1243 const char *string) 1244 { 1245 struct elfNN_ia64_link_hash_entry *ret; 1246 ret = (struct elfNN_ia64_link_hash_entry *) entry; 1247 1248 /* Allocate the structure if it has not already been allocated by a 1249 subclass. */ 1250 if (!ret) 1251 ret = bfd_hash_allocate (table, sizeof (*ret)); 1252 1253 if (!ret) 1254 return 0; 1255 1256 /* Call the allocation method of the superclass. */ 1257 ret = ((struct elfNN_ia64_link_hash_entry *) 1258 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, 1259 table, string)); 1260 1261 ret->info = NULL; 1262 ret->count = 0; 1263 ret->sorted_count = 0; 1264 ret->size = 0; 1265 return (struct bfd_hash_entry *) ret; 1266 } 1267 1268 static void 1269 elfNN_ia64_hash_copy_indirect (struct bfd_link_info *info, 1270 struct elf_link_hash_entry *xdir, 1271 struct elf_link_hash_entry *xind) 1272 { 1273 struct elfNN_ia64_link_hash_entry *dir, *ind; 1274 1275 dir = (struct elfNN_ia64_link_hash_entry *) xdir; 1276 ind = (struct elfNN_ia64_link_hash_entry *) xind; 1277 1278 /* Copy down any references that we may have already seen to the 1279 symbol which just became indirect. */ 1280 1281 dir->root.ref_dynamic |= ind->root.ref_dynamic; 1282 dir->root.ref_regular |= ind->root.ref_regular; 1283 dir->root.ref_regular_nonweak |= ind->root.ref_regular_nonweak; 1284 dir->root.needs_plt |= ind->root.needs_plt; 1285 1286 if (ind->root.root.type != bfd_link_hash_indirect) 1287 return; 1288 1289 /* Copy over the got and plt data. This would have been done 1290 by check_relocs. */ 1291 1292 if (ind->info != NULL) 1293 { 1294 struct elfNN_ia64_dyn_sym_info *dyn_i; 1295 unsigned int count; 1296 1297 if (dir->info) 1298 free (dir->info); 1299 1300 dir->info = ind->info; 1301 dir->count = ind->count; 1302 dir->sorted_count = ind->sorted_count; 1303 dir->size = ind->size; 1304 1305 ind->info = NULL; 1306 ind->count = 0; 1307 ind->sorted_count = 0; 1308 ind->size = 0; 1309 1310 /* Fix up the dyn_sym_info pointers to the global symbol. */ 1311 for (count = dir->count, dyn_i = dir->info; 1312 count != 0; 1313 count--, dyn_i++) 1314 dyn_i->h = &dir->root; 1315 } 1316 1317 /* Copy over the dynindx. */ 1318 1319 if (ind->root.dynindx != -1) 1320 { 1321 if (dir->root.dynindx != -1) 1322 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, 1323 dir->root.dynstr_index); 1324 dir->root.dynindx = ind->root.dynindx; 1325 dir->root.dynstr_index = ind->root.dynstr_index; 1326 ind->root.dynindx = -1; 1327 ind->root.dynstr_index = 0; 1328 } 1329 } 1330 1331 static void 1332 elfNN_ia64_hash_hide_symbol (struct bfd_link_info *info, 1333 struct elf_link_hash_entry *xh, 1334 bfd_boolean force_local) 1335 { 1336 struct elfNN_ia64_link_hash_entry *h; 1337 struct elfNN_ia64_dyn_sym_info *dyn_i; 1338 unsigned int count; 1339 1340 h = (struct elfNN_ia64_link_hash_entry *)xh; 1341 1342 _bfd_elf_link_hash_hide_symbol (info, &h->root, force_local); 1343 1344 for (count = h->count, dyn_i = h->info; 1345 count != 0; 1346 count--, dyn_i++) 1347 { 1348 dyn_i->want_plt2 = 0; 1349 dyn_i->want_plt = 0; 1350 } 1351 } 1352 1353 /* Compute a hash of a local hash entry. */ 1354 1355 static hashval_t 1356 elfNN_ia64_local_htab_hash (const void *ptr) 1357 { 1358 struct elfNN_ia64_local_hash_entry *entry 1359 = (struct elfNN_ia64_local_hash_entry *) ptr; 1360 1361 return ELF_LOCAL_SYMBOL_HASH (entry->id, entry->r_sym); 1362 } 1363 1364 /* Compare local hash entries. */ 1365 1366 static int 1367 elfNN_ia64_local_htab_eq (const void *ptr1, const void *ptr2) 1368 { 1369 struct elfNN_ia64_local_hash_entry *entry1 1370 = (struct elfNN_ia64_local_hash_entry *) ptr1; 1371 struct elfNN_ia64_local_hash_entry *entry2 1372 = (struct elfNN_ia64_local_hash_entry *) ptr2; 1373 1374 return entry1->id == entry2->id && entry1->r_sym == entry2->r_sym; 1375 } 1376 1377 /* Free the global elfNN_ia64_dyn_sym_info array. */ 1378 1379 static bfd_boolean 1380 elfNN_ia64_global_dyn_info_free (void **xentry, 1381 void * unused ATTRIBUTE_UNUSED) 1382 { 1383 struct elfNN_ia64_link_hash_entry *entry 1384 = (struct elfNN_ia64_link_hash_entry *) xentry; 1385 1386 if (entry->info) 1387 { 1388 free (entry->info); 1389 entry->info = NULL; 1390 entry->count = 0; 1391 entry->sorted_count = 0; 1392 entry->size = 0; 1393 } 1394 1395 return TRUE; 1396 } 1397 1398 /* Free the local elfNN_ia64_dyn_sym_info array. */ 1399 1400 static bfd_boolean 1401 elfNN_ia64_local_dyn_info_free (void **slot, 1402 void * unused ATTRIBUTE_UNUSED) 1403 { 1404 struct elfNN_ia64_local_hash_entry *entry 1405 = (struct elfNN_ia64_local_hash_entry *) *slot; 1406 1407 if (entry->info) 1408 { 1409 free (entry->info); 1410 entry->info = NULL; 1411 entry->count = 0; 1412 entry->sorted_count = 0; 1413 entry->size = 0; 1414 } 1415 1416 return TRUE; 1417 } 1418 1419 /* Destroy IA-64 linker hash table. */ 1420 1421 static void 1422 elfNN_ia64_link_hash_table_free (bfd *obfd) 1423 { 1424 struct elfNN_ia64_link_hash_table *ia64_info 1425 = (struct elfNN_ia64_link_hash_table *) obfd->link.hash; 1426 if (ia64_info->loc_hash_table) 1427 { 1428 htab_traverse (ia64_info->loc_hash_table, 1429 elfNN_ia64_local_dyn_info_free, NULL); 1430 htab_delete (ia64_info->loc_hash_table); 1431 } 1432 if (ia64_info->loc_hash_memory) 1433 objalloc_free ((struct objalloc *) ia64_info->loc_hash_memory); 1434 elf_link_hash_traverse (&ia64_info->root, 1435 elfNN_ia64_global_dyn_info_free, NULL); 1436 _bfd_elf_link_hash_table_free (obfd); 1437 } 1438 1439 /* Create the derived linker hash table. The IA-64 ELF port uses this 1440 derived hash table to keep information specific to the IA-64 ElF 1441 linker (without using static variables). */ 1442 1443 static struct bfd_link_hash_table * 1444 elfNN_ia64_hash_table_create (bfd *abfd) 1445 { 1446 struct elfNN_ia64_link_hash_table *ret; 1447 1448 ret = bfd_zmalloc ((bfd_size_type) sizeof (*ret)); 1449 if (!ret) 1450 return NULL; 1451 1452 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, 1453 elfNN_ia64_new_elf_hash_entry, 1454 sizeof (struct elfNN_ia64_link_hash_entry), 1455 IA64_ELF_DATA)) 1456 { 1457 free (ret); 1458 return NULL; 1459 } 1460 1461 ret->loc_hash_table = htab_try_create (1024, elfNN_ia64_local_htab_hash, 1462 elfNN_ia64_local_htab_eq, NULL); 1463 ret->loc_hash_memory = objalloc_create (); 1464 if (!ret->loc_hash_table || !ret->loc_hash_memory) 1465 { 1466 elfNN_ia64_link_hash_table_free (abfd); 1467 return NULL; 1468 } 1469 ret->root.root.hash_table_free = elfNN_ia64_link_hash_table_free; 1470 1471 return &ret->root.root; 1472 } 1473 1474 /* Traverse both local and global hash tables. */ 1475 1476 struct elfNN_ia64_dyn_sym_traverse_data 1477 { 1478 bfd_boolean (*func) (struct elfNN_ia64_dyn_sym_info *, void *); 1479 void * data; 1480 }; 1481 1482 static bfd_boolean 1483 elfNN_ia64_global_dyn_sym_thunk (struct bfd_hash_entry *xentry, 1484 void * xdata) 1485 { 1486 struct elfNN_ia64_link_hash_entry *entry 1487 = (struct elfNN_ia64_link_hash_entry *) xentry; 1488 struct elfNN_ia64_dyn_sym_traverse_data *data 1489 = (struct elfNN_ia64_dyn_sym_traverse_data *) xdata; 1490 struct elfNN_ia64_dyn_sym_info *dyn_i; 1491 unsigned int count; 1492 1493 for (count = entry->count, dyn_i = entry->info; 1494 count != 0; 1495 count--, dyn_i++) 1496 if (! (*data->func) (dyn_i, data->data)) 1497 return FALSE; 1498 return TRUE; 1499 } 1500 1501 static bfd_boolean 1502 elfNN_ia64_local_dyn_sym_thunk (void **slot, void * xdata) 1503 { 1504 struct elfNN_ia64_local_hash_entry *entry 1505 = (struct elfNN_ia64_local_hash_entry *) *slot; 1506 struct elfNN_ia64_dyn_sym_traverse_data *data 1507 = (struct elfNN_ia64_dyn_sym_traverse_data *) xdata; 1508 struct elfNN_ia64_dyn_sym_info *dyn_i; 1509 unsigned int count; 1510 1511 for (count = entry->count, dyn_i = entry->info; 1512 count != 0; 1513 count--, dyn_i++) 1514 if (! (*data->func) (dyn_i, data->data)) 1515 return FALSE; 1516 return TRUE; 1517 } 1518 1519 static void 1520 elfNN_ia64_dyn_sym_traverse (struct elfNN_ia64_link_hash_table *ia64_info, 1521 bfd_boolean (*func) (struct elfNN_ia64_dyn_sym_info *, void *), 1522 void * data) 1523 { 1524 struct elfNN_ia64_dyn_sym_traverse_data xdata; 1525 1526 xdata.func = func; 1527 xdata.data = data; 1528 1529 elf_link_hash_traverse (&ia64_info->root, 1530 elfNN_ia64_global_dyn_sym_thunk, &xdata); 1531 htab_traverse (ia64_info->loc_hash_table, 1532 elfNN_ia64_local_dyn_sym_thunk, &xdata); 1533 } 1534 1535 static bfd_boolean 1537 elfNN_ia64_create_dynamic_sections (bfd *abfd, 1538 struct bfd_link_info *info) 1539 { 1540 struct elfNN_ia64_link_hash_table *ia64_info; 1541 asection *s; 1542 1543 if (! _bfd_elf_create_dynamic_sections (abfd, info)) 1544 return FALSE; 1545 1546 ia64_info = elfNN_ia64_hash_table (info); 1547 if (ia64_info == NULL) 1548 return FALSE; 1549 1550 { 1551 flagword flags = bfd_get_section_flags (abfd, ia64_info->root.sgot); 1552 bfd_set_section_flags (abfd, ia64_info->root.sgot, 1553 SEC_SMALL_DATA | flags); 1554 /* The .got section is always aligned at 8 bytes. */ 1555 if (! bfd_set_section_alignment (abfd, ia64_info->root.sgot, 3)) 1556 return FALSE; 1557 } 1558 1559 if (!get_pltoff (abfd, info, ia64_info)) 1560 return FALSE; 1561 1562 s = bfd_make_section_anyway_with_flags (abfd, ".rela.IA_64.pltoff", 1563 (SEC_ALLOC | SEC_LOAD 1564 | SEC_HAS_CONTENTS 1565 | SEC_IN_MEMORY 1566 | SEC_LINKER_CREATED 1567 | SEC_READONLY)); 1568 if (s == NULL 1569 || !bfd_set_section_alignment (abfd, s, LOG_SECTION_ALIGN)) 1570 return FALSE; 1571 ia64_info->rel_pltoff_sec = s; 1572 1573 return TRUE; 1574 } 1575 1576 /* Find and/or create a hash entry for local symbol. */ 1577 static struct elfNN_ia64_local_hash_entry * 1578 get_local_sym_hash (struct elfNN_ia64_link_hash_table *ia64_info, 1579 bfd *abfd, const Elf_Internal_Rela *rel, 1580 bfd_boolean create) 1581 { 1582 struct elfNN_ia64_local_hash_entry e, *ret; 1583 asection *sec = abfd->sections; 1584 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id, 1585 ELFNN_R_SYM (rel->r_info)); 1586 void **slot; 1587 1588 e.id = sec->id; 1589 e.r_sym = ELFNN_R_SYM (rel->r_info); 1590 slot = htab_find_slot_with_hash (ia64_info->loc_hash_table, &e, h, 1591 create ? INSERT : NO_INSERT); 1592 1593 if (!slot) 1594 return NULL; 1595 1596 if (*slot) 1597 return (struct elfNN_ia64_local_hash_entry *) *slot; 1598 1599 ret = (struct elfNN_ia64_local_hash_entry *) 1600 objalloc_alloc ((struct objalloc *) ia64_info->loc_hash_memory, 1601 sizeof (struct elfNN_ia64_local_hash_entry)); 1602 if (ret) 1603 { 1604 memset (ret, 0, sizeof (*ret)); 1605 ret->id = sec->id; 1606 ret->r_sym = ELFNN_R_SYM (rel->r_info); 1607 *slot = ret; 1608 } 1609 return ret; 1610 } 1611 1612 /* Used to sort elfNN_ia64_dyn_sym_info array. */ 1613 1614 static int 1615 addend_compare (const void *xp, const void *yp) 1616 { 1617 const struct elfNN_ia64_dyn_sym_info *x 1618 = (const struct elfNN_ia64_dyn_sym_info *) xp; 1619 const struct elfNN_ia64_dyn_sym_info *y 1620 = (const struct elfNN_ia64_dyn_sym_info *) yp; 1621 1622 return x->addend < y->addend ? -1 : x->addend > y->addend ? 1 : 0; 1623 } 1624 1625 /* Sort elfNN_ia64_dyn_sym_info array and remove duplicates. */ 1626 1627 static unsigned int 1628 sort_dyn_sym_info (struct elfNN_ia64_dyn_sym_info *info, 1629 unsigned int count) 1630 { 1631 bfd_vma curr, prev, got_offset; 1632 unsigned int i, kept, dupes, diff, dest, src, len; 1633 1634 qsort (info, count, sizeof (*info), addend_compare); 1635 1636 /* Find the first duplicate. */ 1637 prev = info [0].addend; 1638 got_offset = info [0].got_offset; 1639 for (i = 1; i < count; i++) 1640 { 1641 curr = info [i].addend; 1642 if (curr == prev) 1643 { 1644 /* For duplicates, make sure that GOT_OFFSET is valid. */ 1645 if (got_offset == (bfd_vma) -1) 1646 got_offset = info [i].got_offset; 1647 break; 1648 } 1649 got_offset = info [i].got_offset; 1650 prev = curr; 1651 } 1652 1653 /* We may move a block of elements to here. */ 1654 dest = i++; 1655 1656 /* Remove duplicates. */ 1657 if (i < count) 1658 { 1659 while (i < count) 1660 { 1661 /* For duplicates, make sure that the kept one has a valid 1662 got_offset. */ 1663 kept = dest - 1; 1664 if (got_offset != (bfd_vma) -1) 1665 info [kept].got_offset = got_offset; 1666 1667 curr = info [i].addend; 1668 got_offset = info [i].got_offset; 1669 1670 /* Move a block of elements whose first one is different from 1671 the previous. */ 1672 if (curr == prev) 1673 { 1674 for (src = i + 1; src < count; src++) 1675 { 1676 if (info [src].addend != curr) 1677 break; 1678 /* For duplicates, make sure that GOT_OFFSET is 1679 valid. */ 1680 if (got_offset == (bfd_vma) -1) 1681 got_offset = info [src].got_offset; 1682 } 1683 1684 /* Make sure that the kept one has a valid got_offset. */ 1685 if (got_offset != (bfd_vma) -1) 1686 info [kept].got_offset = got_offset; 1687 } 1688 else 1689 src = i; 1690 1691 if (src >= count) 1692 break; 1693 1694 /* Find the next duplicate. SRC will be kept. */ 1695 prev = info [src].addend; 1696 got_offset = info [src].got_offset; 1697 for (dupes = src + 1; dupes < count; dupes ++) 1698 { 1699 curr = info [dupes].addend; 1700 if (curr == prev) 1701 { 1702 /* Make sure that got_offset is valid. */ 1703 if (got_offset == (bfd_vma) -1) 1704 got_offset = info [dupes].got_offset; 1705 1706 /* For duplicates, make sure that the kept one has 1707 a valid got_offset. */ 1708 if (got_offset != (bfd_vma) -1) 1709 info [dupes - 1].got_offset = got_offset; 1710 break; 1711 } 1712 got_offset = info [dupes].got_offset; 1713 prev = curr; 1714 } 1715 1716 /* How much to move. */ 1717 len = dupes - src; 1718 i = dupes + 1; 1719 1720 if (len == 1 && dupes < count) 1721 { 1722 /* If we only move 1 element, we combine it with the next 1723 one. There must be at least a duplicate. Find the 1724 next different one. */ 1725 for (diff = dupes + 1, src++; diff < count; diff++, src++) 1726 { 1727 if (info [diff].addend != curr) 1728 break; 1729 /* Make sure that got_offset is valid. */ 1730 if (got_offset == (bfd_vma) -1) 1731 got_offset = info [diff].got_offset; 1732 } 1733 1734 /* Makre sure that the last duplicated one has an valid 1735 offset. */ 1736 BFD_ASSERT (curr == prev); 1737 if (got_offset != (bfd_vma) -1) 1738 info [diff - 1].got_offset = got_offset; 1739 1740 if (diff < count) 1741 { 1742 /* Find the next duplicate. Track the current valid 1743 offset. */ 1744 prev = info [diff].addend; 1745 got_offset = info [diff].got_offset; 1746 for (dupes = diff + 1; dupes < count; dupes ++) 1747 { 1748 curr = info [dupes].addend; 1749 if (curr == prev) 1750 { 1751 /* For duplicates, make sure that GOT_OFFSET 1752 is valid. */ 1753 if (got_offset == (bfd_vma) -1) 1754 got_offset = info [dupes].got_offset; 1755 break; 1756 } 1757 got_offset = info [dupes].got_offset; 1758 prev = curr; 1759 diff++; 1760 } 1761 1762 len = diff - src + 1; 1763 i = diff + 1; 1764 } 1765 } 1766 1767 memmove (&info [dest], &info [src], len * sizeof (*info)); 1768 1769 dest += len; 1770 } 1771 1772 count = dest; 1773 } 1774 else 1775 { 1776 /* When we get here, either there is no duplicate at all or 1777 the only duplicate is the last element. */ 1778 if (dest < count) 1779 { 1780 /* If the last element is a duplicate, make sure that the 1781 kept one has a valid got_offset. We also update count. */ 1782 if (got_offset != (bfd_vma) -1) 1783 info [dest - 1].got_offset = got_offset; 1784 count = dest; 1785 } 1786 } 1787 1788 return count; 1789 } 1790 1791 /* Find and/or create a descriptor for dynamic symbol info. This will 1792 vary based on global or local symbol, and the addend to the reloc. 1793 1794 We don't sort when inserting. Also, we sort and eliminate 1795 duplicates if there is an unsorted section. Typically, this will 1796 only happen once, because we do all insertions before lookups. We 1797 then use bsearch to do a lookup. This also allows lookups to be 1798 fast. So we have fast insertion (O(log N) due to duplicate check), 1799 fast lookup (O(log N)) and one sort (O(N log N) expected time). 1800 Previously, all lookups were O(N) because of the use of the linked 1801 list and also all insertions were O(N) because of the check for 1802 duplicates. There are some complications here because the array 1803 size grows occasionally, which may add an O(N) factor, but this 1804 should be rare. Also, we free the excess array allocation, which 1805 requires a copy which is O(N), but this only happens once. */ 1806 1807 static struct elfNN_ia64_dyn_sym_info * 1808 get_dyn_sym_info (struct elfNN_ia64_link_hash_table *ia64_info, 1809 struct elf_link_hash_entry *h, bfd *abfd, 1810 const Elf_Internal_Rela *rel, bfd_boolean create) 1811 { 1812 struct elfNN_ia64_dyn_sym_info **info_p, *info, *dyn_i, key; 1813 unsigned int *count_p, *sorted_count_p, *size_p; 1814 unsigned int count, sorted_count, size; 1815 bfd_vma addend = rel ? rel->r_addend : 0; 1816 bfd_size_type amt; 1817 1818 if (h) 1819 { 1820 struct elfNN_ia64_link_hash_entry *global_h; 1821 1822 global_h = (struct elfNN_ia64_link_hash_entry *) h; 1823 info_p = &global_h->info; 1824 count_p = &global_h->count; 1825 sorted_count_p = &global_h->sorted_count; 1826 size_p = &global_h->size; 1827 } 1828 else 1829 { 1830 struct elfNN_ia64_local_hash_entry *loc_h; 1831 1832 loc_h = get_local_sym_hash (ia64_info, abfd, rel, create); 1833 if (!loc_h) 1834 { 1835 BFD_ASSERT (!create); 1836 return NULL; 1837 } 1838 1839 info_p = &loc_h->info; 1840 count_p = &loc_h->count; 1841 sorted_count_p = &loc_h->sorted_count; 1842 size_p = &loc_h->size; 1843 } 1844 1845 count = *count_p; 1846 sorted_count = *sorted_count_p; 1847 size = *size_p; 1848 info = *info_p; 1849 if (create) 1850 { 1851 /* When we create the array, we don't check for duplicates, 1852 except in the previously sorted section if one exists, and 1853 against the last inserted entry. This allows insertions to 1854 be fast. */ 1855 if (info) 1856 { 1857 if (sorted_count) 1858 { 1859 /* Try bsearch first on the sorted section. */ 1860 key.addend = addend; 1861 dyn_i = bsearch (&key, info, sorted_count, 1862 sizeof (*info), addend_compare); 1863 1864 if (dyn_i) 1865 { 1866 return dyn_i; 1867 } 1868 } 1869 1870 /* Do a quick check for the last inserted entry. */ 1871 dyn_i = info + count - 1; 1872 if (dyn_i->addend == addend) 1873 { 1874 return dyn_i; 1875 } 1876 } 1877 1878 if (size == 0) 1879 { 1880 /* It is the very first element. We create the array of size 1881 1. */ 1882 size = 1; 1883 amt = size * sizeof (*info); 1884 info = bfd_malloc (amt); 1885 } 1886 else if (size <= count) 1887 { 1888 /* We double the array size every time when we reach the 1889 size limit. */ 1890 size += size; 1891 amt = size * sizeof (*info); 1892 info = bfd_realloc (info, amt); 1893 } 1894 else 1895 goto has_space; 1896 1897 if (info == NULL) 1898 return NULL; 1899 *size_p = size; 1900 *info_p = info; 1901 1902 has_space: 1903 /* Append the new one to the array. */ 1904 dyn_i = info + count; 1905 memset (dyn_i, 0, sizeof (*dyn_i)); 1906 dyn_i->got_offset = (bfd_vma) -1; 1907 dyn_i->addend = addend; 1908 1909 /* We increment count only since the new ones are unsorted and 1910 may have duplicate. */ 1911 (*count_p)++; 1912 } 1913 else 1914 { 1915 /* It is a lookup without insertion. Sort array if part of the 1916 array isn't sorted. */ 1917 if (count != sorted_count) 1918 { 1919 count = sort_dyn_sym_info (info, count); 1920 *count_p = count; 1921 *sorted_count_p = count; 1922 } 1923 1924 /* Free unused memory. */ 1925 if (size != count) 1926 { 1927 amt = count * sizeof (*info); 1928 info = bfd_malloc (amt); 1929 if (info != NULL) 1930 { 1931 memcpy (info, *info_p, amt); 1932 free (*info_p); 1933 *size_p = count; 1934 *info_p = info; 1935 } 1936 } 1937 1938 key.addend = addend; 1939 dyn_i = bsearch (&key, info, count, 1940 sizeof (*info), addend_compare); 1941 } 1942 1943 return dyn_i; 1944 } 1945 1946 static asection * 1947 get_got (bfd *abfd, struct bfd_link_info *info, 1948 struct elfNN_ia64_link_hash_table *ia64_info) 1949 { 1950 asection *got; 1951 bfd *dynobj; 1952 1953 got = ia64_info->root.sgot; 1954 if (!got) 1955 { 1956 flagword flags; 1957 1958 dynobj = ia64_info->root.dynobj; 1959 if (!dynobj) 1960 ia64_info->root.dynobj = dynobj = abfd; 1961 if (!_bfd_elf_create_got_section (dynobj, info)) 1962 return NULL; 1963 1964 got = ia64_info->root.sgot; 1965 1966 /* The .got section is always aligned at 8 bytes. */ 1967 if (!bfd_set_section_alignment (abfd, got, 3)) 1968 return NULL; 1969 1970 flags = bfd_get_section_flags (abfd, got); 1971 if (! bfd_set_section_flags (abfd, got, SEC_SMALL_DATA | flags)) 1972 return NULL; 1973 } 1974 1975 return got; 1976 } 1977 1978 /* Create function descriptor section (.opd). This section is called .opd 1979 because it contains "official procedure descriptors". The "official" 1980 refers to the fact that these descriptors are used when taking the address 1981 of a procedure, thus ensuring a unique address for each procedure. */ 1982 1983 static asection * 1984 get_fptr (bfd *abfd, struct bfd_link_info *info, 1985 struct elfNN_ia64_link_hash_table *ia64_info) 1986 { 1987 asection *fptr; 1988 bfd *dynobj; 1989 1990 fptr = ia64_info->fptr_sec; 1991 if (!fptr) 1992 { 1993 dynobj = ia64_info->root.dynobj; 1994 if (!dynobj) 1995 ia64_info->root.dynobj = dynobj = abfd; 1996 1997 fptr = bfd_make_section_anyway_with_flags (dynobj, ".opd", 1998 (SEC_ALLOC 1999 | SEC_LOAD 2000 | SEC_HAS_CONTENTS 2001 | SEC_IN_MEMORY 2002 | (bfd_link_pie (info) 2003 ? 0 : SEC_READONLY) 2004 | SEC_LINKER_CREATED)); 2005 if (!fptr 2006 || !bfd_set_section_alignment (abfd, fptr, 4)) 2007 { 2008 BFD_ASSERT (0); 2009 return NULL; 2010 } 2011 2012 ia64_info->fptr_sec = fptr; 2013 2014 if (bfd_link_pie (info)) 2015 { 2016 asection *fptr_rel; 2017 fptr_rel = bfd_make_section_anyway_with_flags (dynobj, ".rela.opd", 2018 (SEC_ALLOC | SEC_LOAD 2019 | SEC_HAS_CONTENTS 2020 | SEC_IN_MEMORY 2021 | SEC_LINKER_CREATED 2022 | SEC_READONLY)); 2023 if (fptr_rel == NULL 2024 || !bfd_set_section_alignment (abfd, fptr_rel, 2025 LOG_SECTION_ALIGN)) 2026 { 2027 BFD_ASSERT (0); 2028 return NULL; 2029 } 2030 2031 ia64_info->rel_fptr_sec = fptr_rel; 2032 } 2033 } 2034 2035 return fptr; 2036 } 2037 2038 static asection * 2039 get_pltoff (bfd *abfd, struct bfd_link_info *info ATTRIBUTE_UNUSED, 2040 struct elfNN_ia64_link_hash_table *ia64_info) 2041 { 2042 asection *pltoff; 2043 bfd *dynobj; 2044 2045 pltoff = ia64_info->pltoff_sec; 2046 if (!pltoff) 2047 { 2048 dynobj = ia64_info->root.dynobj; 2049 if (!dynobj) 2050 ia64_info->root.dynobj = dynobj = abfd; 2051 2052 pltoff = bfd_make_section_anyway_with_flags (dynobj, 2053 ELF_STRING_ia64_pltoff, 2054 (SEC_ALLOC 2055 | SEC_LOAD 2056 | SEC_HAS_CONTENTS 2057 | SEC_IN_MEMORY 2058 | SEC_SMALL_DATA 2059 | SEC_LINKER_CREATED)); 2060 if (!pltoff 2061 || !bfd_set_section_alignment (abfd, pltoff, 4)) 2062 { 2063 BFD_ASSERT (0); 2064 return NULL; 2065 } 2066 2067 ia64_info->pltoff_sec = pltoff; 2068 } 2069 2070 return pltoff; 2071 } 2072 2073 static asection * 2074 get_reloc_section (bfd *abfd, 2075 struct elfNN_ia64_link_hash_table *ia64_info, 2076 asection *sec, bfd_boolean create) 2077 { 2078 const char *srel_name; 2079 asection *srel; 2080 bfd *dynobj; 2081 2082 srel_name = (bfd_elf_string_from_elf_section 2083 (abfd, elf_elfheader(abfd)->e_shstrndx, 2084 _bfd_elf_single_rel_hdr (sec)->sh_name)); 2085 if (srel_name == NULL) 2086 return NULL; 2087 2088 dynobj = ia64_info->root.dynobj; 2089 if (!dynobj) 2090 ia64_info->root.dynobj = dynobj = abfd; 2091 2092 srel = bfd_get_linker_section (dynobj, srel_name); 2093 if (srel == NULL && create) 2094 { 2095 srel = bfd_make_section_anyway_with_flags (dynobj, srel_name, 2096 (SEC_ALLOC | SEC_LOAD 2097 | SEC_HAS_CONTENTS 2098 | SEC_IN_MEMORY 2099 | SEC_LINKER_CREATED 2100 | SEC_READONLY)); 2101 if (srel == NULL 2102 || !bfd_set_section_alignment (dynobj, srel, 2103 LOG_SECTION_ALIGN)) 2104 return NULL; 2105 } 2106 2107 return srel; 2108 } 2109 2110 static bfd_boolean 2111 count_dyn_reloc (bfd *abfd, struct elfNN_ia64_dyn_sym_info *dyn_i, 2112 asection *srel, int type, bfd_boolean reltext) 2113 { 2114 struct elfNN_ia64_dyn_reloc_entry *rent; 2115 2116 for (rent = dyn_i->reloc_entries; rent; rent = rent->next) 2117 if (rent->srel == srel && rent->type == type) 2118 break; 2119 2120 if (!rent) 2121 { 2122 rent = ((struct elfNN_ia64_dyn_reloc_entry *) 2123 bfd_alloc (abfd, (bfd_size_type) sizeof (*rent))); 2124 if (!rent) 2125 return FALSE; 2126 2127 rent->next = dyn_i->reloc_entries; 2128 rent->srel = srel; 2129 rent->type = type; 2130 rent->count = 0; 2131 dyn_i->reloc_entries = rent; 2132 } 2133 rent->reltext = reltext; 2134 rent->count++; 2135 2136 return TRUE; 2137 } 2138 2139 static bfd_boolean 2140 elfNN_ia64_check_relocs (bfd *abfd, struct bfd_link_info *info, 2141 asection *sec, 2142 const Elf_Internal_Rela *relocs) 2143 { 2144 struct elfNN_ia64_link_hash_table *ia64_info; 2145 const Elf_Internal_Rela *relend; 2146 Elf_Internal_Shdr *symtab_hdr; 2147 const Elf_Internal_Rela *rel; 2148 asection *got, *fptr, *srel, *pltoff; 2149 enum { 2150 NEED_GOT = 1, 2151 NEED_GOTX = 2, 2152 NEED_FPTR = 4, 2153 NEED_PLTOFF = 8, 2154 NEED_MIN_PLT = 16, 2155 NEED_FULL_PLT = 32, 2156 NEED_DYNREL = 64, 2157 NEED_LTOFF_FPTR = 128, 2158 NEED_TPREL = 256, 2159 NEED_DTPMOD = 512, 2160 NEED_DTPREL = 1024 2161 }; 2162 int need_entry; 2163 struct elf_link_hash_entry *h; 2164 unsigned long r_symndx; 2165 bfd_boolean maybe_dynamic; 2166 2167 if (bfd_link_relocatable (info)) 2168 return TRUE; 2169 2170 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 2171 ia64_info = elfNN_ia64_hash_table (info); 2172 if (ia64_info == NULL) 2173 return FALSE; 2174 2175 got = fptr = srel = pltoff = NULL; 2176 2177 relend = relocs + sec->reloc_count; 2178 2179 /* We scan relocations first to create dynamic relocation arrays. We 2180 modified get_dyn_sym_info to allow fast insertion and support fast 2181 lookup in the next loop. */ 2182 for (rel = relocs; rel < relend; ++rel) 2183 { 2184 r_symndx = ELFNN_R_SYM (rel->r_info); 2185 if (r_symndx >= symtab_hdr->sh_info) 2186 { 2187 long indx = r_symndx - symtab_hdr->sh_info; 2188 h = elf_sym_hashes (abfd)[indx]; 2189 while (h->root.type == bfd_link_hash_indirect 2190 || h->root.type == bfd_link_hash_warning) 2191 h = (struct elf_link_hash_entry *) h->root.u.i.link; 2192 } 2193 else 2194 h = NULL; 2195 2196 /* We can only get preliminary data on whether a symbol is 2197 locally or externally defined, as not all of the input files 2198 have yet been processed. Do something with what we know, as 2199 this may help reduce memory usage and processing time later. */ 2200 maybe_dynamic = (h && ((!bfd_link_executable (info) 2201 && (!SYMBOLIC_BIND (info, h) 2202 || info->unresolved_syms_in_shared_libs == RM_IGNORE)) 2203 || !h->def_regular 2204 || h->root.type == bfd_link_hash_defweak)); 2205 2206 need_entry = 0; 2207 switch (ELFNN_R_TYPE (rel->r_info)) 2208 { 2209 case R_IA64_TPREL64MSB: 2210 case R_IA64_TPREL64LSB: 2211 if (bfd_link_pic (info) || maybe_dynamic) 2212 need_entry = NEED_DYNREL; 2213 break; 2214 2215 case R_IA64_LTOFF_TPREL22: 2216 need_entry = NEED_TPREL; 2217 if (bfd_link_pic (info)) 2218 info->flags |= DF_STATIC_TLS; 2219 break; 2220 2221 case R_IA64_DTPREL32MSB: 2222 case R_IA64_DTPREL32LSB: 2223 case R_IA64_DTPREL64MSB: 2224 case R_IA64_DTPREL64LSB: 2225 if (bfd_link_pic (info) || maybe_dynamic) 2226 need_entry = NEED_DYNREL; 2227 break; 2228 2229 case R_IA64_LTOFF_DTPREL22: 2230 need_entry = NEED_DTPREL; 2231 break; 2232 2233 case R_IA64_DTPMOD64MSB: 2234 case R_IA64_DTPMOD64LSB: 2235 if (bfd_link_pic (info) || maybe_dynamic) 2236 need_entry = NEED_DYNREL; 2237 break; 2238 2239 case R_IA64_LTOFF_DTPMOD22: 2240 need_entry = NEED_DTPMOD; 2241 break; 2242 2243 case R_IA64_LTOFF_FPTR22: 2244 case R_IA64_LTOFF_FPTR64I: 2245 case R_IA64_LTOFF_FPTR32MSB: 2246 case R_IA64_LTOFF_FPTR32LSB: 2247 case R_IA64_LTOFF_FPTR64MSB: 2248 case R_IA64_LTOFF_FPTR64LSB: 2249 need_entry = NEED_FPTR | NEED_GOT | NEED_LTOFF_FPTR; 2250 break; 2251 2252 case R_IA64_FPTR64I: 2253 case R_IA64_FPTR32MSB: 2254 case R_IA64_FPTR32LSB: 2255 case R_IA64_FPTR64MSB: 2256 case R_IA64_FPTR64LSB: 2257 if (bfd_link_pic (info) || h) 2258 need_entry = NEED_FPTR | NEED_DYNREL; 2259 else 2260 need_entry = NEED_FPTR; 2261 break; 2262 2263 case R_IA64_LTOFF22: 2264 case R_IA64_LTOFF64I: 2265 need_entry = NEED_GOT; 2266 break; 2267 2268 case R_IA64_LTOFF22X: 2269 need_entry = NEED_GOTX; 2270 break; 2271 2272 case R_IA64_PLTOFF22: 2273 case R_IA64_PLTOFF64I: 2274 case R_IA64_PLTOFF64MSB: 2275 case R_IA64_PLTOFF64LSB: 2276 need_entry = NEED_PLTOFF; 2277 if (h) 2278 { 2279 if (maybe_dynamic) 2280 need_entry |= NEED_MIN_PLT; 2281 } 2282 else 2283 { 2284 (*info->callbacks->warning) 2285 (info, _("@pltoff reloc against local symbol"), 0, 2286 abfd, 0, (bfd_vma) 0); 2287 } 2288 break; 2289 2290 case R_IA64_PCREL21B: 2291 case R_IA64_PCREL60B: 2292 /* Depending on where this symbol is defined, we may or may not 2293 need a full plt entry. Only skip if we know we'll not need 2294 the entry -- static or symbolic, and the symbol definition 2295 has already been seen. */ 2296 if (maybe_dynamic && rel->r_addend == 0) 2297 need_entry = NEED_FULL_PLT; 2298 break; 2299 2300 case R_IA64_IMM14: 2301 case R_IA64_IMM22: 2302 case R_IA64_IMM64: 2303 case R_IA64_DIR32MSB: 2304 case R_IA64_DIR32LSB: 2305 case R_IA64_DIR64MSB: 2306 case R_IA64_DIR64LSB: 2307 /* Shared objects will always need at least a REL relocation. */ 2308 if (bfd_link_pic (info) || maybe_dynamic) 2309 need_entry = NEED_DYNREL; 2310 break; 2311 2312 case R_IA64_IPLTMSB: 2313 case R_IA64_IPLTLSB: 2314 /* Shared objects will always need at least a REL relocation. */ 2315 if (bfd_link_pic (info) || maybe_dynamic) 2316 need_entry = NEED_DYNREL; 2317 break; 2318 2319 case R_IA64_PCREL22: 2320 case R_IA64_PCREL64I: 2321 case R_IA64_PCREL32MSB: 2322 case R_IA64_PCREL32LSB: 2323 case R_IA64_PCREL64MSB: 2324 case R_IA64_PCREL64LSB: 2325 if (maybe_dynamic) 2326 need_entry = NEED_DYNREL; 2327 break; 2328 } 2329 2330 if (!need_entry) 2331 continue; 2332 2333 if ((need_entry & NEED_FPTR) != 0 2334 && rel->r_addend) 2335 { 2336 (*info->callbacks->warning) 2337 (info, _("non-zero addend in @fptr reloc"), 0, 2338 abfd, 0, (bfd_vma) 0); 2339 } 2340 2341 if (get_dyn_sym_info (ia64_info, h, abfd, rel, TRUE) == NULL) 2342 return FALSE; 2343 } 2344 2345 /* Now, we only do lookup without insertion, which is very fast 2346 with the modified get_dyn_sym_info. */ 2347 for (rel = relocs; rel < relend; ++rel) 2348 { 2349 struct elfNN_ia64_dyn_sym_info *dyn_i; 2350 int dynrel_type = R_IA64_NONE; 2351 2352 r_symndx = ELFNN_R_SYM (rel->r_info); 2353 if (r_symndx >= symtab_hdr->sh_info) 2354 { 2355 /* We're dealing with a global symbol -- find its hash entry 2356 and mark it as being referenced. */ 2357 long indx = r_symndx - symtab_hdr->sh_info; 2358 h = elf_sym_hashes (abfd)[indx]; 2359 while (h->root.type == bfd_link_hash_indirect 2360 || h->root.type == bfd_link_hash_warning) 2361 h = (struct elf_link_hash_entry *) h->root.u.i.link; 2362 2363 /* PR15323, ref flags aren't set for references in the same 2364 object. */ 2365 h->root.non_ir_ref = 1; 2366 h->ref_regular = 1; 2367 } 2368 else 2369 h = NULL; 2370 2371 /* We can only get preliminary data on whether a symbol is 2372 locally or externally defined, as not all of the input files 2373 have yet been processed. Do something with what we know, as 2374 this may help reduce memory usage and processing time later. */ 2375 maybe_dynamic = (h && ((!bfd_link_executable (info) 2376 && (!SYMBOLIC_BIND (info, h) 2377 || info->unresolved_syms_in_shared_libs == RM_IGNORE)) 2378 || !h->def_regular 2379 || h->root.type == bfd_link_hash_defweak)); 2380 2381 need_entry = 0; 2382 switch (ELFNN_R_TYPE (rel->r_info)) 2383 { 2384 case R_IA64_TPREL64MSB: 2385 case R_IA64_TPREL64LSB: 2386 if (bfd_link_pic (info) || maybe_dynamic) 2387 need_entry = NEED_DYNREL; 2388 dynrel_type = R_IA64_TPREL64LSB; 2389 if (bfd_link_pic (info)) 2390 info->flags |= DF_STATIC_TLS; 2391 break; 2392 2393 case R_IA64_LTOFF_TPREL22: 2394 need_entry = NEED_TPREL; 2395 if (bfd_link_pic (info)) 2396 info->flags |= DF_STATIC_TLS; 2397 break; 2398 2399 case R_IA64_DTPREL32MSB: 2400 case R_IA64_DTPREL32LSB: 2401 case R_IA64_DTPREL64MSB: 2402 case R_IA64_DTPREL64LSB: 2403 if (bfd_link_pic (info) || maybe_dynamic) 2404 need_entry = NEED_DYNREL; 2405 dynrel_type = R_IA64_DTPRELNNLSB; 2406 break; 2407 2408 case R_IA64_LTOFF_DTPREL22: 2409 need_entry = NEED_DTPREL; 2410 break; 2411 2412 case R_IA64_DTPMOD64MSB: 2413 case R_IA64_DTPMOD64LSB: 2414 if (bfd_link_pic (info) || maybe_dynamic) 2415 need_entry = NEED_DYNREL; 2416 dynrel_type = R_IA64_DTPMOD64LSB; 2417 break; 2418 2419 case R_IA64_LTOFF_DTPMOD22: 2420 need_entry = NEED_DTPMOD; 2421 break; 2422 2423 case R_IA64_LTOFF_FPTR22: 2424 case R_IA64_LTOFF_FPTR64I: 2425 case R_IA64_LTOFF_FPTR32MSB: 2426 case R_IA64_LTOFF_FPTR32LSB: 2427 case R_IA64_LTOFF_FPTR64MSB: 2428 case R_IA64_LTOFF_FPTR64LSB: 2429 need_entry = NEED_FPTR | NEED_GOT | NEED_LTOFF_FPTR; 2430 break; 2431 2432 case R_IA64_FPTR64I: 2433 case R_IA64_FPTR32MSB: 2434 case R_IA64_FPTR32LSB: 2435 case R_IA64_FPTR64MSB: 2436 case R_IA64_FPTR64LSB: 2437 if (bfd_link_pic (info) || h) 2438 need_entry = NEED_FPTR | NEED_DYNREL; 2439 else 2440 need_entry = NEED_FPTR; 2441 dynrel_type = R_IA64_FPTRNNLSB; 2442 break; 2443 2444 case R_IA64_LTOFF22: 2445 case R_IA64_LTOFF64I: 2446 need_entry = NEED_GOT; 2447 break; 2448 2449 case R_IA64_LTOFF22X: 2450 need_entry = NEED_GOTX; 2451 break; 2452 2453 case R_IA64_PLTOFF22: 2454 case R_IA64_PLTOFF64I: 2455 case R_IA64_PLTOFF64MSB: 2456 case R_IA64_PLTOFF64LSB: 2457 need_entry = NEED_PLTOFF; 2458 if (h) 2459 { 2460 if (maybe_dynamic) 2461 need_entry |= NEED_MIN_PLT; 2462 } 2463 break; 2464 2465 case R_IA64_PCREL21B: 2466 case R_IA64_PCREL60B: 2467 /* Depending on where this symbol is defined, we may or may not 2468 need a full plt entry. Only skip if we know we'll not need 2469 the entry -- static or symbolic, and the symbol definition 2470 has already been seen. */ 2471 if (maybe_dynamic && rel->r_addend == 0) 2472 need_entry = NEED_FULL_PLT; 2473 break; 2474 2475 case R_IA64_IMM14: 2476 case R_IA64_IMM22: 2477 case R_IA64_IMM64: 2478 case R_IA64_DIR32MSB: 2479 case R_IA64_DIR32LSB: 2480 case R_IA64_DIR64MSB: 2481 case R_IA64_DIR64LSB: 2482 /* Shared objects will always need at least a REL relocation. */ 2483 if (bfd_link_pic (info) || maybe_dynamic) 2484 need_entry = NEED_DYNREL; 2485 dynrel_type = R_IA64_DIRNNLSB; 2486 break; 2487 2488 case R_IA64_IPLTMSB: 2489 case R_IA64_IPLTLSB: 2490 /* Shared objects will always need at least a REL relocation. */ 2491 if (bfd_link_pic (info) || maybe_dynamic) 2492 need_entry = NEED_DYNREL; 2493 dynrel_type = R_IA64_IPLTLSB; 2494 break; 2495 2496 case R_IA64_PCREL22: 2497 case R_IA64_PCREL64I: 2498 case R_IA64_PCREL32MSB: 2499 case R_IA64_PCREL32LSB: 2500 case R_IA64_PCREL64MSB: 2501 case R_IA64_PCREL64LSB: 2502 if (maybe_dynamic) 2503 need_entry = NEED_DYNREL; 2504 dynrel_type = R_IA64_PCRELNNLSB; 2505 break; 2506 } 2507 2508 if (!need_entry) 2509 continue; 2510 2511 dyn_i = get_dyn_sym_info (ia64_info, h, abfd, rel, FALSE); 2512 2513 /* Record whether or not this is a local symbol. */ 2514 dyn_i->h = h; 2515 2516 /* Create what's needed. */ 2517 if (need_entry & (NEED_GOT | NEED_GOTX | NEED_TPREL 2518 | NEED_DTPMOD | NEED_DTPREL)) 2519 { 2520 if (!got) 2521 { 2522 got = get_got (abfd, info, ia64_info); 2523 if (!got) 2524 return FALSE; 2525 } 2526 if (need_entry & NEED_GOT) 2527 dyn_i->want_got = 1; 2528 if (need_entry & NEED_GOTX) 2529 dyn_i->want_gotx = 1; 2530 if (need_entry & NEED_TPREL) 2531 dyn_i->want_tprel = 1; 2532 if (need_entry & NEED_DTPMOD) 2533 dyn_i->want_dtpmod = 1; 2534 if (need_entry & NEED_DTPREL) 2535 dyn_i->want_dtprel = 1; 2536 } 2537 if (need_entry & NEED_FPTR) 2538 { 2539 if (!fptr) 2540 { 2541 fptr = get_fptr (abfd, info, ia64_info); 2542 if (!fptr) 2543 return FALSE; 2544 } 2545 2546 /* FPTRs for shared libraries are allocated by the dynamic 2547 linker. Make sure this local symbol will appear in the 2548 dynamic symbol table. */ 2549 if (!h && bfd_link_pic (info)) 2550 { 2551 if (! (bfd_elf_link_record_local_dynamic_symbol 2552 (info, abfd, (long) r_symndx))) 2553 return FALSE; 2554 } 2555 2556 dyn_i->want_fptr = 1; 2557 } 2558 if (need_entry & NEED_LTOFF_FPTR) 2559 dyn_i->want_ltoff_fptr = 1; 2560 if (need_entry & (NEED_MIN_PLT | NEED_FULL_PLT)) 2561 { 2562 if (!ia64_info->root.dynobj) 2563 ia64_info->root.dynobj = abfd; 2564 h->needs_plt = 1; 2565 dyn_i->want_plt = 1; 2566 } 2567 if (need_entry & NEED_FULL_PLT) 2568 dyn_i->want_plt2 = 1; 2569 if (need_entry & NEED_PLTOFF) 2570 { 2571 /* This is needed here, in case @pltoff is used in a non-shared 2572 link. */ 2573 if (!pltoff) 2574 { 2575 pltoff = get_pltoff (abfd, info, ia64_info); 2576 if (!pltoff) 2577 return FALSE; 2578 } 2579 2580 dyn_i->want_pltoff = 1; 2581 } 2582 if ((need_entry & NEED_DYNREL) && (sec->flags & SEC_ALLOC)) 2583 { 2584 if (!srel) 2585 { 2586 srel = get_reloc_section (abfd, ia64_info, sec, TRUE); 2587 if (!srel) 2588 return FALSE; 2589 } 2590 if (!count_dyn_reloc (abfd, dyn_i, srel, dynrel_type, 2591 (sec->flags & SEC_READONLY) != 0)) 2592 return FALSE; 2593 } 2594 } 2595 2596 return TRUE; 2597 } 2598 2599 /* For cleanliness, and potentially faster dynamic loading, allocate 2600 external GOT entries first. */ 2601 2602 static bfd_boolean 2603 allocate_global_data_got (struct elfNN_ia64_dyn_sym_info *dyn_i, 2604 void * data) 2605 { 2606 struct elfNN_ia64_allocate_data *x = (struct elfNN_ia64_allocate_data *)data; 2607 2608 if ((dyn_i->want_got || dyn_i->want_gotx) 2609 && ! dyn_i->want_fptr 2610 && elfNN_ia64_dynamic_symbol_p (dyn_i->h, x->info, 0)) 2611 { 2612 dyn_i->got_offset = x->ofs; 2613 x->ofs += 8; 2614 } 2615 if (dyn_i->want_tprel) 2616 { 2617 dyn_i->tprel_offset = x->ofs; 2618 x->ofs += 8; 2619 } 2620 if (dyn_i->want_dtpmod) 2621 { 2622 if (elfNN_ia64_dynamic_symbol_p (dyn_i->h, x->info, 0)) 2623 { 2624 dyn_i->dtpmod_offset = x->ofs; 2625 x->ofs += 8; 2626 } 2627 else 2628 { 2629 struct elfNN_ia64_link_hash_table *ia64_info; 2630 2631 ia64_info = elfNN_ia64_hash_table (x->info); 2632 if (ia64_info == NULL) 2633 return FALSE; 2634 2635 if (ia64_info->self_dtpmod_offset == (bfd_vma) -1) 2636 { 2637 ia64_info->self_dtpmod_offset = x->ofs; 2638 x->ofs += 8; 2639 } 2640 dyn_i->dtpmod_offset = ia64_info->self_dtpmod_offset; 2641 } 2642 } 2643 if (dyn_i->want_dtprel) 2644 { 2645 dyn_i->dtprel_offset = x->ofs; 2646 x->ofs += 8; 2647 } 2648 return TRUE; 2649 } 2650 2651 /* Next, allocate all the GOT entries used by LTOFF_FPTR relocs. */ 2652 2653 static bfd_boolean 2654 allocate_global_fptr_got (struct elfNN_ia64_dyn_sym_info *dyn_i, 2655 void * data) 2656 { 2657 struct elfNN_ia64_allocate_data *x = (struct elfNN_ia64_allocate_data *)data; 2658 2659 if (dyn_i->want_got 2660 && dyn_i->want_fptr 2661 && elfNN_ia64_dynamic_symbol_p (dyn_i->h, x->info, R_IA64_FPTRNNLSB)) 2662 { 2663 dyn_i->got_offset = x->ofs; 2664 x->ofs += 8; 2665 } 2666 return TRUE; 2667 } 2668 2669 /* Lastly, allocate all the GOT entries for local data. */ 2670 2671 static bfd_boolean 2672 allocate_local_got (struct elfNN_ia64_dyn_sym_info *dyn_i, 2673 void * data) 2674 { 2675 struct elfNN_ia64_allocate_data *x = (struct elfNN_ia64_allocate_data *)data; 2676 2677 if ((dyn_i->want_got || dyn_i->want_gotx) 2678 && !elfNN_ia64_dynamic_symbol_p (dyn_i->h, x->info, 0)) 2679 { 2680 dyn_i->got_offset = x->ofs; 2681 x->ofs += 8; 2682 } 2683 return TRUE; 2684 } 2685 2686 /* Search for the index of a global symbol in it's defining object file. */ 2687 2688 static long 2689 global_sym_index (struct elf_link_hash_entry *h) 2690 { 2691 struct elf_link_hash_entry **p; 2692 bfd *obj; 2693 2694 BFD_ASSERT (h->root.type == bfd_link_hash_defined 2695 || h->root.type == bfd_link_hash_defweak); 2696 2697 obj = h->root.u.def.section->owner; 2698 for (p = elf_sym_hashes (obj); *p != h; ++p) 2699 continue; 2700 2701 return p - elf_sym_hashes (obj) + elf_tdata (obj)->symtab_hdr.sh_info; 2702 } 2703 2704 /* Allocate function descriptors. We can do these for every function 2705 in a main executable that is not exported. */ 2706 2707 static bfd_boolean 2708 allocate_fptr (struct elfNN_ia64_dyn_sym_info *dyn_i, void * data) 2709 { 2710 struct elfNN_ia64_allocate_data *x = (struct elfNN_ia64_allocate_data *)data; 2711 2712 if (dyn_i->want_fptr) 2713 { 2714 struct elf_link_hash_entry *h = dyn_i->h; 2715 2716 if (h) 2717 while (h->root.type == bfd_link_hash_indirect 2718 || h->root.type == bfd_link_hash_warning) 2719 h = (struct elf_link_hash_entry *) h->root.u.i.link; 2720 2721 if (!bfd_link_executable (x->info) 2722 && (!h 2723 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 2724 || (h->root.type != bfd_link_hash_undefweak 2725 && h->root.type != bfd_link_hash_undefined))) 2726 { 2727 if (h && h->dynindx == -1) 2728 { 2729 BFD_ASSERT ((h->root.type == bfd_link_hash_defined) 2730 || (h->root.type == bfd_link_hash_defweak)); 2731 2732 if (!bfd_elf_link_record_local_dynamic_symbol 2733 (x->info, h->root.u.def.section->owner, 2734 global_sym_index (h))) 2735 return FALSE; 2736 } 2737 2738 dyn_i->want_fptr = 0; 2739 } 2740 else if (h == NULL || h->dynindx == -1) 2741 { 2742 dyn_i->fptr_offset = x->ofs; 2743 x->ofs += 16; 2744 } 2745 else 2746 dyn_i->want_fptr = 0; 2747 } 2748 return TRUE; 2749 } 2750 2751 /* Allocate all the minimal PLT entries. */ 2752 2753 static bfd_boolean 2754 allocate_plt_entries (struct elfNN_ia64_dyn_sym_info *dyn_i, 2755 void * data) 2756 { 2757 struct elfNN_ia64_allocate_data *x = (struct elfNN_ia64_allocate_data *)data; 2758 2759 if (dyn_i->want_plt) 2760 { 2761 struct elf_link_hash_entry *h = dyn_i->h; 2762 2763 if (h) 2764 while (h->root.type == bfd_link_hash_indirect 2765 || h->root.type == bfd_link_hash_warning) 2766 h = (struct elf_link_hash_entry *) h->root.u.i.link; 2767 2768 /* ??? Versioned symbols seem to lose NEEDS_PLT. */ 2769 if (elfNN_ia64_dynamic_symbol_p (h, x->info, 0)) 2770 { 2771 bfd_size_type offset = x->ofs; 2772 if (offset == 0) 2773 offset = PLT_HEADER_SIZE; 2774 dyn_i->plt_offset = offset; 2775 x->ofs = offset + PLT_MIN_ENTRY_SIZE; 2776 2777 dyn_i->want_pltoff = 1; 2778 } 2779 else 2780 { 2781 dyn_i->want_plt = 0; 2782 dyn_i->want_plt2 = 0; 2783 } 2784 } 2785 return TRUE; 2786 } 2787 2788 /* Allocate all the full PLT entries. */ 2789 2790 static bfd_boolean 2791 allocate_plt2_entries (struct elfNN_ia64_dyn_sym_info *dyn_i, 2792 void * data) 2793 { 2794 struct elfNN_ia64_allocate_data *x = (struct elfNN_ia64_allocate_data *)data; 2795 2796 if (dyn_i->want_plt2) 2797 { 2798 struct elf_link_hash_entry *h = dyn_i->h; 2799 bfd_size_type ofs = x->ofs; 2800 2801 dyn_i->plt2_offset = ofs; 2802 x->ofs = ofs + PLT_FULL_ENTRY_SIZE; 2803 2804 while (h->root.type == bfd_link_hash_indirect 2805 || h->root.type == bfd_link_hash_warning) 2806 h = (struct elf_link_hash_entry *) h->root.u.i.link; 2807 dyn_i->h->plt.offset = ofs; 2808 } 2809 return TRUE; 2810 } 2811 2812 /* Allocate all the PLTOFF entries requested by relocations and 2813 plt entries. We can't share space with allocated FPTR entries, 2814 because the latter are not necessarily addressable by the GP. 2815 ??? Relaxation might be able to determine that they are. */ 2816 2817 static bfd_boolean 2818 allocate_pltoff_entries (struct elfNN_ia64_dyn_sym_info *dyn_i, 2819 void * data) 2820 { 2821 struct elfNN_ia64_allocate_data *x = (struct elfNN_ia64_allocate_data *)data; 2822 2823 if (dyn_i->want_pltoff) 2824 { 2825 dyn_i->pltoff_offset = x->ofs; 2826 x->ofs += 16; 2827 } 2828 return TRUE; 2829 } 2830 2831 /* Allocate dynamic relocations for those symbols that turned out 2832 to be dynamic. */ 2833 2834 static bfd_boolean 2835 allocate_dynrel_entries (struct elfNN_ia64_dyn_sym_info *dyn_i, 2836 void * data) 2837 { 2838 struct elfNN_ia64_allocate_data *x = (struct elfNN_ia64_allocate_data *)data; 2839 struct elfNN_ia64_link_hash_table *ia64_info; 2840 struct elfNN_ia64_dyn_reloc_entry *rent; 2841 bfd_boolean dynamic_symbol, shared, resolved_zero; 2842 2843 ia64_info = elfNN_ia64_hash_table (x->info); 2844 if (ia64_info == NULL) 2845 return FALSE; 2846 2847 /* Note that this can't be used in relation to FPTR relocs below. */ 2848 dynamic_symbol = elfNN_ia64_dynamic_symbol_p (dyn_i->h, x->info, 0); 2849 2850 shared = bfd_link_pic (x->info); 2851 resolved_zero = (dyn_i->h 2852 && ELF_ST_VISIBILITY (dyn_i->h->other) 2853 && dyn_i->h->root.type == bfd_link_hash_undefweak); 2854 2855 /* Take care of the GOT and PLT relocations. */ 2856 2857 if ((!resolved_zero 2858 && (dynamic_symbol || shared) 2859 && (dyn_i->want_got || dyn_i->want_gotx)) 2860 || (dyn_i->want_ltoff_fptr 2861 && dyn_i->h 2862 && dyn_i->h->dynindx != -1)) 2863 { 2864 if (!dyn_i->want_ltoff_fptr 2865 || !bfd_link_pie (x->info) 2866 || dyn_i->h == NULL 2867 || dyn_i->h->root.type != bfd_link_hash_undefweak) 2868 ia64_info->root.srelgot->size += sizeof (ElfNN_External_Rela); 2869 } 2870 if ((dynamic_symbol || shared) && dyn_i->want_tprel) 2871 ia64_info->root.srelgot->size += sizeof (ElfNN_External_Rela); 2872 if (dynamic_symbol && dyn_i->want_dtpmod) 2873 ia64_info->root.srelgot->size += sizeof (ElfNN_External_Rela); 2874 if (dynamic_symbol && dyn_i->want_dtprel) 2875 ia64_info->root.srelgot->size += sizeof (ElfNN_External_Rela); 2876 2877 if (x->only_got) 2878 return TRUE; 2879 2880 if (ia64_info->rel_fptr_sec && dyn_i->want_fptr) 2881 { 2882 if (dyn_i->h == NULL || dyn_i->h->root.type != bfd_link_hash_undefweak) 2883 ia64_info->rel_fptr_sec->size += sizeof (ElfNN_External_Rela); 2884 } 2885 2886 if (!resolved_zero && dyn_i->want_pltoff) 2887 { 2888 bfd_size_type t = 0; 2889 2890 /* Dynamic symbols get one IPLT relocation. Local symbols in 2891 shared libraries get two REL relocations. Local symbols in 2892 main applications get nothing. */ 2893 if (dynamic_symbol) 2894 t = sizeof (ElfNN_External_Rela); 2895 else if (shared) 2896 t = 2 * sizeof (ElfNN_External_Rela); 2897 2898 ia64_info->rel_pltoff_sec->size += t; 2899 } 2900 2901 /* Take care of the normal data relocations. */ 2902 2903 for (rent = dyn_i->reloc_entries; rent; rent = rent->next) 2904 { 2905 int count = rent->count; 2906 2907 switch (rent->type) 2908 { 2909 case R_IA64_FPTR32LSB: 2910 case R_IA64_FPTR64LSB: 2911 /* Allocate one iff !want_fptr and not PIE, which by this point 2912 will be true only if we're actually allocating one statically 2913 in the main executable. Position independent executables 2914 need a relative reloc. */ 2915 if (dyn_i->want_fptr && !bfd_link_pie (x->info)) 2916 continue; 2917 break; 2918 case R_IA64_PCREL32LSB: 2919 case R_IA64_PCREL64LSB: 2920 if (!dynamic_symbol) 2921 continue; 2922 break; 2923 case R_IA64_DIR32LSB: 2924 case R_IA64_DIR64LSB: 2925 if (!dynamic_symbol && !shared) 2926 continue; 2927 break; 2928 case R_IA64_IPLTLSB: 2929 if (!dynamic_symbol && !shared) 2930 continue; 2931 /* Use two REL relocations for IPLT relocations 2932 against local symbols. */ 2933 if (!dynamic_symbol) 2934 count *= 2; 2935 break; 2936 case R_IA64_DTPREL32LSB: 2937 case R_IA64_TPREL64LSB: 2938 case R_IA64_DTPREL64LSB: 2939 case R_IA64_DTPMOD64LSB: 2940 break; 2941 default: 2942 abort (); 2943 } 2944 if (rent->reltext) 2945 ia64_info->reltext = 1; 2946 rent->srel->size += sizeof (ElfNN_External_Rela) * count; 2947 } 2948 2949 return TRUE; 2950 } 2951 2952 static bfd_boolean 2953 elfNN_ia64_adjust_dynamic_symbol (struct bfd_link_info *info ATTRIBUTE_UNUSED, 2954 struct elf_link_hash_entry *h) 2955 { 2956 /* ??? Undefined symbols with PLT entries should be re-defined 2957 to be the PLT entry. */ 2958 2959 /* If this is a weak symbol, and there is a real definition, the 2960 processor independent code will have arranged for us to see the 2961 real definition first, and we can just use the same value. */ 2962 if (h->u.weakdef != NULL) 2963 { 2964 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined 2965 || h->u.weakdef->root.type == bfd_link_hash_defweak); 2966 h->root.u.def.section = h->u.weakdef->root.u.def.section; 2967 h->root.u.def.value = h->u.weakdef->root.u.def.value; 2968 return TRUE; 2969 } 2970 2971 /* If this is a reference to a symbol defined by a dynamic object which 2972 is not a function, we might allocate the symbol in our .dynbss section 2973 and allocate a COPY dynamic relocation. 2974 2975 But IA-64 code is canonically PIC, so as a rule we can avoid this sort 2976 of hackery. */ 2977 2978 return TRUE; 2979 } 2980 2981 static bfd_boolean 2982 elfNN_ia64_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, 2983 struct bfd_link_info *info) 2984 { 2985 struct elfNN_ia64_allocate_data data; 2986 struct elfNN_ia64_link_hash_table *ia64_info; 2987 asection *sec; 2988 bfd *dynobj; 2989 bfd_boolean relplt = FALSE; 2990 2991 dynobj = elf_hash_table(info)->dynobj; 2992 ia64_info = elfNN_ia64_hash_table (info); 2993 if (ia64_info == NULL) 2994 return FALSE; 2995 ia64_info->self_dtpmod_offset = (bfd_vma) -1; 2996 BFD_ASSERT(dynobj != NULL); 2997 data.info = info; 2998 2999 /* Set the contents of the .interp section to the interpreter. */ 3000 if (ia64_info->root.dynamic_sections_created 3001 && bfd_link_executable (info) && !info->nointerp) 3002 { 3003 sec = bfd_get_linker_section (dynobj, ".interp"); 3004 BFD_ASSERT (sec != NULL); 3005 sec->contents = (bfd_byte *) ELF_DYNAMIC_INTERPRETER; 3006 sec->size = strlen (ELF_DYNAMIC_INTERPRETER) + 1; 3007 } 3008 3009 /* Allocate the GOT entries. */ 3010 3011 if (ia64_info->root.sgot) 3012 { 3013 data.ofs = 0; 3014 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_global_data_got, &data); 3015 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_global_fptr_got, &data); 3016 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_local_got, &data); 3017 ia64_info->root.sgot->size = data.ofs; 3018 } 3019 3020 /* Allocate the FPTR entries. */ 3021 3022 if (ia64_info->fptr_sec) 3023 { 3024 data.ofs = 0; 3025 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_fptr, &data); 3026 ia64_info->fptr_sec->size = data.ofs; 3027 } 3028 3029 /* Now that we've seen all of the input files, we can decide which 3030 symbols need plt entries. Allocate the minimal PLT entries first. 3031 We do this even though dynamic_sections_created may be FALSE, because 3032 this has the side-effect of clearing want_plt and want_plt2. */ 3033 3034 data.ofs = 0; 3035 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_plt_entries, &data); 3036 3037 ia64_info->minplt_entries = 0; 3038 if (data.ofs) 3039 { 3040 ia64_info->minplt_entries 3041 = (data.ofs - PLT_HEADER_SIZE) / PLT_MIN_ENTRY_SIZE; 3042 } 3043 3044 /* Align the pointer for the plt2 entries. */ 3045 data.ofs = (data.ofs + 31) & (bfd_vma) -32; 3046 3047 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_plt2_entries, &data); 3048 if (data.ofs != 0 || ia64_info->root.dynamic_sections_created) 3049 { 3050 /* FIXME: we always reserve the memory for dynamic linker even if 3051 there are no PLT entries since dynamic linker may assume the 3052 reserved memory always exists. */ 3053 3054 BFD_ASSERT (ia64_info->root.dynamic_sections_created); 3055 3056 ia64_info->root.splt->size = data.ofs; 3057 3058 /* If we've got a .plt, we need some extra memory for the dynamic 3059 linker. We stuff these in .got.plt. */ 3060 sec = bfd_get_linker_section (dynobj, ".got.plt"); 3061 sec->size = 8 * PLT_RESERVED_WORDS; 3062 } 3063 3064 /* Allocate the PLTOFF entries. */ 3065 3066 if (ia64_info->pltoff_sec) 3067 { 3068 data.ofs = 0; 3069 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_pltoff_entries, &data); 3070 ia64_info->pltoff_sec->size = data.ofs; 3071 } 3072 3073 if (ia64_info->root.dynamic_sections_created) 3074 { 3075 /* Allocate space for the dynamic relocations that turned out to be 3076 required. */ 3077 3078 if (bfd_link_pic (info) && ia64_info->self_dtpmod_offset != (bfd_vma) -1) 3079 ia64_info->root.srelgot->size += sizeof (ElfNN_External_Rela); 3080 data.only_got = FALSE; 3081 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_dynrel_entries, &data); 3082 } 3083 3084 /* We have now determined the sizes of the various dynamic sections. 3085 Allocate memory for them. */ 3086 for (sec = dynobj->sections; sec != NULL; sec = sec->next) 3087 { 3088 bfd_boolean strip; 3089 3090 if (!(sec->flags & SEC_LINKER_CREATED)) 3091 continue; 3092 3093 /* If we don't need this section, strip it from the output file. 3094 There were several sections primarily related to dynamic 3095 linking that must be create before the linker maps input 3096 sections to output sections. The linker does that before 3097 bfd_elf_size_dynamic_sections is called, and it is that 3098 function which decides whether anything needs to go into 3099 these sections. */ 3100 3101 strip = (sec->size == 0); 3102 3103 if (sec == ia64_info->root.sgot) 3104 strip = FALSE; 3105 else if (sec == ia64_info->root.srelgot) 3106 { 3107 if (strip) 3108 ia64_info->root.srelgot = NULL; 3109 else 3110 /* We use the reloc_count field as a counter if we need to 3111 copy relocs into the output file. */ 3112 sec->reloc_count = 0; 3113 } 3114 else if (sec == ia64_info->fptr_sec) 3115 { 3116 if (strip) 3117 ia64_info->fptr_sec = NULL; 3118 } 3119 else if (sec == ia64_info->rel_fptr_sec) 3120 { 3121 if (strip) 3122 ia64_info->rel_fptr_sec = NULL; 3123 else 3124 /* We use the reloc_count field as a counter if we need to 3125 copy relocs into the output file. */ 3126 sec->reloc_count = 0; 3127 } 3128 else if (sec == ia64_info->root.splt) 3129 { 3130 if (strip) 3131 ia64_info->root.splt = NULL; 3132 } 3133 else if (sec == ia64_info->pltoff_sec) 3134 { 3135 if (strip) 3136 ia64_info->pltoff_sec = NULL; 3137 } 3138 else if (sec == ia64_info->rel_pltoff_sec) 3139 { 3140 if (strip) 3141 ia64_info->rel_pltoff_sec = NULL; 3142 else 3143 { 3144 relplt = TRUE; 3145 /* We use the reloc_count field as a counter if we need to 3146 copy relocs into the output file. */ 3147 sec->reloc_count = 0; 3148 } 3149 } 3150 else 3151 { 3152 const char *name; 3153 3154 /* It's OK to base decisions on the section name, because none 3155 of the dynobj section names depend upon the input files. */ 3156 name = bfd_get_section_name (dynobj, sec); 3157 3158 if (strcmp (name, ".got.plt") == 0) 3159 strip = FALSE; 3160 else if (CONST_STRNEQ (name, ".rel")) 3161 { 3162 if (!strip) 3163 { 3164 /* We use the reloc_count field as a counter if we need to 3165 copy relocs into the output file. */ 3166 sec->reloc_count = 0; 3167 } 3168 } 3169 else 3170 continue; 3171 } 3172 3173 if (strip) 3174 sec->flags |= SEC_EXCLUDE; 3175 else 3176 { 3177 /* Allocate memory for the section contents. */ 3178 sec->contents = (bfd_byte *) bfd_zalloc (dynobj, sec->size); 3179 if (sec->contents == NULL && sec->size != 0) 3180 return FALSE; 3181 } 3182 } 3183 3184 if (elf_hash_table (info)->dynamic_sections_created) 3185 { 3186 /* Add some entries to the .dynamic section. We fill in the values 3187 later (in finish_dynamic_sections) but we must add the entries now 3188 so that we get the correct size for the .dynamic section. */ 3189 3190 if (bfd_link_executable (info)) 3191 { 3192 /* The DT_DEBUG entry is filled in by the dynamic linker and used 3193 by the debugger. */ 3194 #define add_dynamic_entry(TAG, VAL) \ 3195 _bfd_elf_add_dynamic_entry (info, TAG, VAL) 3196 3197 if (!add_dynamic_entry (DT_DEBUG, 0)) 3198 return FALSE; 3199 } 3200 3201 if (!add_dynamic_entry (DT_IA_64_PLT_RESERVE, 0)) 3202 return FALSE; 3203 if (!add_dynamic_entry (DT_PLTGOT, 0)) 3204 return FALSE; 3205 3206 if (relplt) 3207 { 3208 if (!add_dynamic_entry (DT_PLTRELSZ, 0) 3209 || !add_dynamic_entry (DT_PLTREL, DT_RELA) 3210 || !add_dynamic_entry (DT_JMPREL, 0)) 3211 return FALSE; 3212 } 3213 3214 if (!add_dynamic_entry (DT_RELA, 0) 3215 || !add_dynamic_entry (DT_RELASZ, 0) 3216 || !add_dynamic_entry (DT_RELAENT, sizeof (ElfNN_External_Rela))) 3217 return FALSE; 3218 3219 if (ia64_info->reltext) 3220 { 3221 if (!add_dynamic_entry (DT_TEXTREL, 0)) 3222 return FALSE; 3223 info->flags |= DF_TEXTREL; 3224 } 3225 } 3226 3227 /* ??? Perhaps force __gp local. */ 3228 3229 return TRUE; 3230 } 3231 3232 static void 3233 elfNN_ia64_install_dyn_reloc (bfd *abfd, struct bfd_link_info *info, 3234 asection *sec, asection *srel, 3235 bfd_vma offset, unsigned int type, 3236 long dynindx, bfd_vma addend) 3237 { 3238 Elf_Internal_Rela outrel; 3239 bfd_byte *loc; 3240 3241 BFD_ASSERT (dynindx != -1); 3242 outrel.r_info = ELFNN_R_INFO (dynindx, type); 3243 outrel.r_addend = addend; 3244 outrel.r_offset = _bfd_elf_section_offset (abfd, info, sec, offset); 3245 if (outrel.r_offset >= (bfd_vma) -2) 3246 { 3247 /* Run for the hills. We shouldn't be outputting a relocation 3248 for this. So do what everyone else does and output a no-op. */ 3249 outrel.r_info = ELFNN_R_INFO (0, R_IA64_NONE); 3250 outrel.r_addend = 0; 3251 outrel.r_offset = 0; 3252 } 3253 else 3254 outrel.r_offset += sec->output_section->vma + sec->output_offset; 3255 3256 loc = srel->contents; 3257 loc += srel->reloc_count++ * sizeof (ElfNN_External_Rela); 3258 bfd_elfNN_swap_reloca_out (abfd, &outrel, loc); 3259 BFD_ASSERT (sizeof (ElfNN_External_Rela) * srel->reloc_count <= srel->size); 3260 } 3261 3262 /* Store an entry for target address TARGET_ADDR in the linkage table 3263 and return the gp-relative address of the linkage table entry. */ 3264 3265 static bfd_vma 3266 set_got_entry (bfd *abfd, struct bfd_link_info *info, 3267 struct elfNN_ia64_dyn_sym_info *dyn_i, 3268 long dynindx, bfd_vma addend, bfd_vma value, 3269 unsigned int dyn_r_type) 3270 { 3271 struct elfNN_ia64_link_hash_table *ia64_info; 3272 asection *got_sec; 3273 bfd_boolean done; 3274 bfd_vma got_offset; 3275 3276 ia64_info = elfNN_ia64_hash_table (info); 3277 if (ia64_info == NULL) 3278 return 0; 3279 3280 got_sec = ia64_info->root.sgot; 3281 3282 switch (dyn_r_type) 3283 { 3284 case R_IA64_TPREL64LSB: 3285 done = dyn_i->tprel_done; 3286 dyn_i->tprel_done = TRUE; 3287 got_offset = dyn_i->tprel_offset; 3288 break; 3289 case R_IA64_DTPMOD64LSB: 3290 if (dyn_i->dtpmod_offset != ia64_info->self_dtpmod_offset) 3291 { 3292 done = dyn_i->dtpmod_done; 3293 dyn_i->dtpmod_done = TRUE; 3294 } 3295 else 3296 { 3297 done = ia64_info->self_dtpmod_done; 3298 ia64_info->self_dtpmod_done = TRUE; 3299 dynindx = 0; 3300 } 3301 got_offset = dyn_i->dtpmod_offset; 3302 break; 3303 case R_IA64_DTPREL32LSB: 3304 case R_IA64_DTPREL64LSB: 3305 done = dyn_i->dtprel_done; 3306 dyn_i->dtprel_done = TRUE; 3307 got_offset = dyn_i->dtprel_offset; 3308 break; 3309 default: 3310 done = dyn_i->got_done; 3311 dyn_i->got_done = TRUE; 3312 got_offset = dyn_i->got_offset; 3313 break; 3314 } 3315 3316 BFD_ASSERT ((got_offset & 7) == 0); 3317 3318 if (! done) 3319 { 3320 /* Store the target address in the linkage table entry. */ 3321 bfd_put_64 (abfd, value, got_sec->contents + got_offset); 3322 3323 /* Install a dynamic relocation if needed. */ 3324 if (((bfd_link_pic (info) 3325 && (!dyn_i->h 3326 || ELF_ST_VISIBILITY (dyn_i->h->other) == STV_DEFAULT 3327 || dyn_i->h->root.type != bfd_link_hash_undefweak) 3328 && dyn_r_type != R_IA64_DTPREL32LSB 3329 && dyn_r_type != R_IA64_DTPREL64LSB) 3330 || elfNN_ia64_dynamic_symbol_p (dyn_i->h, info, dyn_r_type) 3331 || (dynindx != -1 3332 && (dyn_r_type == R_IA64_FPTR32LSB 3333 || dyn_r_type == R_IA64_FPTR64LSB))) 3334 && (!dyn_i->want_ltoff_fptr 3335 || !bfd_link_pie (info) 3336 || !dyn_i->h 3337 || dyn_i->h->root.type != bfd_link_hash_undefweak)) 3338 { 3339 if (dynindx == -1 3340 && dyn_r_type != R_IA64_TPREL64LSB 3341 && dyn_r_type != R_IA64_DTPMOD64LSB 3342 && dyn_r_type != R_IA64_DTPREL32LSB 3343 && dyn_r_type != R_IA64_DTPREL64LSB) 3344 { 3345 dyn_r_type = R_IA64_RELNNLSB; 3346 dynindx = 0; 3347 addend = value; 3348 } 3349 3350 if (bfd_big_endian (abfd)) 3351 { 3352 switch (dyn_r_type) 3353 { 3354 case R_IA64_REL32LSB: 3355 dyn_r_type = R_IA64_REL32MSB; 3356 break; 3357 case R_IA64_DIR32LSB: 3358 dyn_r_type = R_IA64_DIR32MSB; 3359 break; 3360 case R_IA64_FPTR32LSB: 3361 dyn_r_type = R_IA64_FPTR32MSB; 3362 break; 3363 case R_IA64_DTPREL32LSB: 3364 dyn_r_type = R_IA64_DTPREL32MSB; 3365 break; 3366 case R_IA64_REL64LSB: 3367 dyn_r_type = R_IA64_REL64MSB; 3368 break; 3369 case R_IA64_DIR64LSB: 3370 dyn_r_type = R_IA64_DIR64MSB; 3371 break; 3372 case R_IA64_FPTR64LSB: 3373 dyn_r_type = R_IA64_FPTR64MSB; 3374 break; 3375 case R_IA64_TPREL64LSB: 3376 dyn_r_type = R_IA64_TPREL64MSB; 3377 break; 3378 case R_IA64_DTPMOD64LSB: 3379 dyn_r_type = R_IA64_DTPMOD64MSB; 3380 break; 3381 case R_IA64_DTPREL64LSB: 3382 dyn_r_type = R_IA64_DTPREL64MSB; 3383 break; 3384 default: 3385 BFD_ASSERT (FALSE); 3386 break; 3387 } 3388 } 3389 3390 elfNN_ia64_install_dyn_reloc (abfd, NULL, got_sec, 3391 ia64_info->root.srelgot, 3392 got_offset, dyn_r_type, 3393 dynindx, addend); 3394 } 3395 } 3396 3397 /* Return the address of the linkage table entry. */ 3398 value = (got_sec->output_section->vma 3399 + got_sec->output_offset 3400 + got_offset); 3401 3402 return value; 3403 } 3404 3405 /* Fill in a function descriptor consisting of the function's code 3406 address and its global pointer. Return the descriptor's address. */ 3407 3408 static bfd_vma 3409 set_fptr_entry (bfd *abfd, struct bfd_link_info *info, 3410 struct elfNN_ia64_dyn_sym_info *dyn_i, 3411 bfd_vma value) 3412 { 3413 struct elfNN_ia64_link_hash_table *ia64_info; 3414 asection *fptr_sec; 3415 3416 ia64_info = elfNN_ia64_hash_table (info); 3417 if (ia64_info == NULL) 3418 return 0; 3419 3420 fptr_sec = ia64_info->fptr_sec; 3421 3422 if (!dyn_i->fptr_done) 3423 { 3424 dyn_i->fptr_done = 1; 3425 3426 /* Fill in the function descriptor. */ 3427 bfd_put_64 (abfd, value, fptr_sec->contents + dyn_i->fptr_offset); 3428 bfd_put_64 (abfd, _bfd_get_gp_value (abfd), 3429 fptr_sec->contents + dyn_i->fptr_offset + 8); 3430 if (ia64_info->rel_fptr_sec) 3431 { 3432 Elf_Internal_Rela outrel; 3433 bfd_byte *loc; 3434 3435 if (bfd_little_endian (abfd)) 3436 outrel.r_info = ELFNN_R_INFO (0, R_IA64_IPLTLSB); 3437 else 3438 outrel.r_info = ELFNN_R_INFO (0, R_IA64_IPLTMSB); 3439 outrel.r_addend = value; 3440 outrel.r_offset = (fptr_sec->output_section->vma 3441 + fptr_sec->output_offset 3442 + dyn_i->fptr_offset); 3443 loc = ia64_info->rel_fptr_sec->contents; 3444 loc += ia64_info->rel_fptr_sec->reloc_count++ 3445 * sizeof (ElfNN_External_Rela); 3446 bfd_elfNN_swap_reloca_out (abfd, &outrel, loc); 3447 } 3448 } 3449 3450 /* Return the descriptor's address. */ 3451 value = (fptr_sec->output_section->vma 3452 + fptr_sec->output_offset 3453 + dyn_i->fptr_offset); 3454 3455 return value; 3456 } 3457 3458 /* Fill in a PLTOFF entry consisting of the function's code address 3459 and its global pointer. Return the descriptor's address. */ 3460 3461 static bfd_vma 3462 set_pltoff_entry (bfd *abfd, struct bfd_link_info *info, 3463 struct elfNN_ia64_dyn_sym_info *dyn_i, 3464 bfd_vma value, bfd_boolean is_plt) 3465 { 3466 struct elfNN_ia64_link_hash_table *ia64_info; 3467 asection *pltoff_sec; 3468 3469 ia64_info = elfNN_ia64_hash_table (info); 3470 if (ia64_info == NULL) 3471 return 0; 3472 3473 pltoff_sec = ia64_info->pltoff_sec; 3474 3475 /* Don't do anything if this symbol uses a real PLT entry. In 3476 that case, we'll fill this in during finish_dynamic_symbol. */ 3477 if ((! dyn_i->want_plt || is_plt) 3478 && !dyn_i->pltoff_done) 3479 { 3480 bfd_vma gp = _bfd_get_gp_value (abfd); 3481 3482 /* Fill in the function descriptor. */ 3483 bfd_put_64 (abfd, value, pltoff_sec->contents + dyn_i->pltoff_offset); 3484 bfd_put_64 (abfd, gp, pltoff_sec->contents + dyn_i->pltoff_offset + 8); 3485 3486 /* Install dynamic relocations if needed. */ 3487 if (!is_plt 3488 && bfd_link_pic (info) 3489 && (!dyn_i->h 3490 || ELF_ST_VISIBILITY (dyn_i->h->other) == STV_DEFAULT 3491 || dyn_i->h->root.type != bfd_link_hash_undefweak)) 3492 { 3493 unsigned int dyn_r_type; 3494 3495 if (bfd_big_endian (abfd)) 3496 dyn_r_type = R_IA64_RELNNMSB; 3497 else 3498 dyn_r_type = R_IA64_RELNNLSB; 3499 3500 elfNN_ia64_install_dyn_reloc (abfd, NULL, pltoff_sec, 3501 ia64_info->rel_pltoff_sec, 3502 dyn_i->pltoff_offset, 3503 dyn_r_type, 0, value); 3504 elfNN_ia64_install_dyn_reloc (abfd, NULL, pltoff_sec, 3505 ia64_info->rel_pltoff_sec, 3506 dyn_i->pltoff_offset + ARCH_SIZE / 8, 3507 dyn_r_type, 0, gp); 3508 } 3509 3510 dyn_i->pltoff_done = 1; 3511 } 3512 3513 /* Return the descriptor's address. */ 3514 value = (pltoff_sec->output_section->vma 3515 + pltoff_sec->output_offset 3516 + dyn_i->pltoff_offset); 3517 3518 return value; 3519 } 3520 3521 /* Return the base VMA address which should be subtracted from real addresses 3522 when resolving @tprel() relocation. 3523 Main program TLS (whose template starts at PT_TLS p_vaddr) 3524 is assigned offset round(2 * size of pointer, PT_TLS p_align). */ 3525 3526 static bfd_vma 3527 elfNN_ia64_tprel_base (struct bfd_link_info *info) 3528 { 3529 asection *tls_sec = elf_hash_table (info)->tls_sec; 3530 return tls_sec->vma - align_power ((bfd_vma) ARCH_SIZE / 4, 3531 tls_sec->alignment_power); 3532 } 3533 3534 /* Return the base VMA address which should be subtracted from real addresses 3535 when resolving @dtprel() relocation. 3536 This is PT_TLS segment p_vaddr. */ 3537 3538 static bfd_vma 3539 elfNN_ia64_dtprel_base (struct bfd_link_info *info) 3540 { 3541 return elf_hash_table (info)->tls_sec->vma; 3542 } 3543 3544 /* Called through qsort to sort the .IA_64.unwind section during a 3545 non-relocatable link. Set elfNN_ia64_unwind_entry_compare_bfd 3546 to the output bfd so we can do proper endianness frobbing. */ 3547 3548 static bfd *elfNN_ia64_unwind_entry_compare_bfd; 3549 3550 static int 3551 elfNN_ia64_unwind_entry_compare (const void * a, const void * b) 3552 { 3553 bfd_vma av, bv; 3554 3555 av = bfd_get_64 (elfNN_ia64_unwind_entry_compare_bfd, a); 3556 bv = bfd_get_64 (elfNN_ia64_unwind_entry_compare_bfd, b); 3557 3558 return (av < bv ? -1 : av > bv ? 1 : 0); 3559 } 3560 3561 /* Make sure we've got ourselves a nice fat __gp value. */ 3562 static bfd_boolean 3563 elfNN_ia64_choose_gp (bfd *abfd, struct bfd_link_info *info, bfd_boolean final) 3564 { 3565 bfd_vma min_vma = (bfd_vma) -1, max_vma = 0; 3566 bfd_vma min_short_vma = min_vma, max_short_vma = 0; 3567 struct elf_link_hash_entry *gp; 3568 bfd_vma gp_val; 3569 asection *os; 3570 struct elfNN_ia64_link_hash_table *ia64_info; 3571 3572 ia64_info = elfNN_ia64_hash_table (info); 3573 if (ia64_info == NULL) 3574 return FALSE; 3575 3576 /* Find the min and max vma of all sections marked short. Also collect 3577 min and max vma of any type, for use in selecting a nice gp. */ 3578 for (os = abfd->sections; os ; os = os->next) 3579 { 3580 bfd_vma lo, hi; 3581 3582 if ((os->flags & SEC_ALLOC) == 0) 3583 continue; 3584 3585 lo = os->vma; 3586 /* When this function is called from elfNN_ia64_final_link 3587 the correct value to use is os->size. When called from 3588 elfNN_ia64_relax_section we are in the middle of section 3589 sizing; some sections will already have os->size set, others 3590 will have os->size zero and os->rawsize the previous size. */ 3591 hi = os->vma + (!final && os->rawsize ? os->rawsize : os->size); 3592 if (hi < lo) 3593 hi = (bfd_vma) -1; 3594 3595 if (min_vma > lo) 3596 min_vma = lo; 3597 if (max_vma < hi) 3598 max_vma = hi; 3599 if (os->flags & SEC_SMALL_DATA) 3600 { 3601 if (min_short_vma > lo) 3602 min_short_vma = lo; 3603 if (max_short_vma < hi) 3604 max_short_vma = hi; 3605 } 3606 } 3607 3608 if (ia64_info->min_short_sec) 3609 { 3610 if (min_short_vma 3611 > (ia64_info->min_short_sec->vma 3612 + ia64_info->min_short_offset)) 3613 min_short_vma = (ia64_info->min_short_sec->vma 3614 + ia64_info->min_short_offset); 3615 if (max_short_vma 3616 < (ia64_info->max_short_sec->vma 3617 + ia64_info->max_short_offset)) 3618 max_short_vma = (ia64_info->max_short_sec->vma 3619 + ia64_info->max_short_offset); 3620 } 3621 3622 /* See if the user wants to force a value. */ 3623 gp = elf_link_hash_lookup (elf_hash_table (info), "__gp", FALSE, 3624 FALSE, FALSE); 3625 3626 if (gp 3627 && (gp->root.type == bfd_link_hash_defined 3628 || gp->root.type == bfd_link_hash_defweak)) 3629 { 3630 asection *gp_sec = gp->root.u.def.section; 3631 gp_val = (gp->root.u.def.value 3632 + gp_sec->output_section->vma 3633 + gp_sec->output_offset); 3634 } 3635 else 3636 { 3637 /* Pick a sensible value. */ 3638 3639 if (ia64_info->min_short_sec) 3640 { 3641 bfd_vma short_range = max_short_vma - min_short_vma; 3642 3643 /* If min_short_sec is set, pick one in the middle bewteen 3644 min_short_vma and max_short_vma. */ 3645 if (short_range >= 0x400000) 3646 goto overflow; 3647 gp_val = min_short_vma + short_range / 2; 3648 } 3649 else 3650 { 3651 asection *got_sec = ia64_info->root.sgot; 3652 3653 /* Start with just the address of the .got. */ 3654 if (got_sec) 3655 gp_val = got_sec->output_section->vma; 3656 else if (max_short_vma != 0) 3657 gp_val = min_short_vma; 3658 else if (max_vma - min_vma < 0x200000) 3659 gp_val = min_vma; 3660 else 3661 gp_val = max_vma - 0x200000 + 8; 3662 } 3663 3664 /* If it is possible to address the entire image, but we 3665 don't with the choice above, adjust. */ 3666 if (max_vma - min_vma < 0x400000 3667 && (max_vma - gp_val >= 0x200000 3668 || gp_val - min_vma > 0x200000)) 3669 gp_val = min_vma + 0x200000; 3670 else if (max_short_vma != 0) 3671 { 3672 /* If we don't cover all the short data, adjust. */ 3673 if (max_short_vma - gp_val >= 0x200000) 3674 gp_val = min_short_vma + 0x200000; 3675 3676 /* If we're addressing stuff past the end, adjust back. */ 3677 if (gp_val > max_vma) 3678 gp_val = max_vma - 0x200000 + 8; 3679 } 3680 } 3681 3682 /* Validate whether all SHF_IA_64_SHORT sections are within 3683 range of the chosen GP. */ 3684 3685 if (max_short_vma != 0) 3686 { 3687 if (max_short_vma - min_short_vma >= 0x400000) 3688 { 3689 overflow: 3690 (*_bfd_error_handler) 3691 (_("%s: short data segment overflowed (0x%lx >= 0x400000)"), 3692 bfd_get_filename (abfd), 3693 (unsigned long) (max_short_vma - min_short_vma)); 3694 return FALSE; 3695 } 3696 else if ((gp_val > min_short_vma 3697 && gp_val - min_short_vma > 0x200000) 3698 || (gp_val < max_short_vma 3699 && max_short_vma - gp_val >= 0x200000)) 3700 { 3701 (*_bfd_error_handler) 3702 (_("%s: __gp does not cover short data segment"), 3703 bfd_get_filename (abfd)); 3704 return FALSE; 3705 } 3706 } 3707 3708 _bfd_set_gp_value (abfd, gp_val); 3709 3710 return TRUE; 3711 } 3712 3713 static bfd_boolean 3714 elfNN_ia64_final_link (bfd *abfd, struct bfd_link_info *info) 3715 { 3716 struct elfNN_ia64_link_hash_table *ia64_info; 3717 asection *unwind_output_sec; 3718 3719 ia64_info = elfNN_ia64_hash_table (info); 3720 if (ia64_info == NULL) 3721 return FALSE; 3722 3723 /* Make sure we've got ourselves a nice fat __gp value. */ 3724 if (!bfd_link_relocatable (info)) 3725 { 3726 bfd_vma gp_val; 3727 struct elf_link_hash_entry *gp; 3728 3729 /* We assume after gp is set, section size will only decrease. We 3730 need to adjust gp for it. */ 3731 _bfd_set_gp_value (abfd, 0); 3732 if (! elfNN_ia64_choose_gp (abfd, info, TRUE)) 3733 return FALSE; 3734 gp_val = _bfd_get_gp_value (abfd); 3735 3736 gp = elf_link_hash_lookup (elf_hash_table (info), "__gp", FALSE, 3737 FALSE, FALSE); 3738 if (gp) 3739 { 3740 gp->root.type = bfd_link_hash_defined; 3741 gp->root.u.def.value = gp_val; 3742 gp->root.u.def.section = bfd_abs_section_ptr; 3743 } 3744 } 3745 3746 /* If we're producing a final executable, we need to sort the contents 3747 of the .IA_64.unwind section. Force this section to be relocated 3748 into memory rather than written immediately to the output file. */ 3749 unwind_output_sec = NULL; 3750 if (!bfd_link_relocatable (info)) 3751 { 3752 asection *s = bfd_get_section_by_name (abfd, ELF_STRING_ia64_unwind); 3753 if (s) 3754 { 3755 unwind_output_sec = s->output_section; 3756 unwind_output_sec->contents 3757 = bfd_malloc (unwind_output_sec->size); 3758 if (unwind_output_sec->contents == NULL) 3759 return FALSE; 3760 } 3761 } 3762 3763 /* Invoke the regular ELF backend linker to do all the work. */ 3764 if (!bfd_elf_final_link (abfd, info)) 3765 return FALSE; 3766 3767 if (unwind_output_sec) 3768 { 3769 elfNN_ia64_unwind_entry_compare_bfd = abfd; 3770 qsort (unwind_output_sec->contents, 3771 (size_t) (unwind_output_sec->size / 24), 3772 24, 3773 elfNN_ia64_unwind_entry_compare); 3774 3775 if (! bfd_set_section_contents (abfd, unwind_output_sec, 3776 unwind_output_sec->contents, (bfd_vma) 0, 3777 unwind_output_sec->size)) 3778 return FALSE; 3779 } 3780 3781 return TRUE; 3782 } 3783 3784 static bfd_boolean 3785 elfNN_ia64_relocate_section (bfd *output_bfd, 3786 struct bfd_link_info *info, 3787 bfd *input_bfd, 3788 asection *input_section, 3789 bfd_byte *contents, 3790 Elf_Internal_Rela *relocs, 3791 Elf_Internal_Sym *local_syms, 3792 asection **local_sections) 3793 { 3794 struct elfNN_ia64_link_hash_table *ia64_info; 3795 Elf_Internal_Shdr *symtab_hdr; 3796 Elf_Internal_Rela *rel; 3797 Elf_Internal_Rela *relend; 3798 asection *srel; 3799 bfd_boolean ret_val = TRUE; /* for non-fatal errors */ 3800 bfd_vma gp_val; 3801 3802 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; 3803 ia64_info = elfNN_ia64_hash_table (info); 3804 if (ia64_info == NULL) 3805 return FALSE; 3806 3807 /* Infect various flags from the input section to the output section. */ 3808 if (bfd_link_relocatable (info)) 3809 { 3810 bfd_vma flags; 3811 3812 flags = elf_section_data(input_section)->this_hdr.sh_flags; 3813 flags &= SHF_IA_64_NORECOV; 3814 3815 elf_section_data(input_section->output_section) 3816 ->this_hdr.sh_flags |= flags; 3817 } 3818 3819 gp_val = _bfd_get_gp_value (output_bfd); 3820 srel = get_reloc_section (input_bfd, ia64_info, input_section, FALSE); 3821 3822 rel = relocs; 3823 relend = relocs + input_section->reloc_count; 3824 for (; rel < relend; ++rel) 3825 { 3826 struct elf_link_hash_entry *h; 3827 struct elfNN_ia64_dyn_sym_info *dyn_i; 3828 bfd_reloc_status_type r; 3829 reloc_howto_type *howto; 3830 unsigned long r_symndx; 3831 Elf_Internal_Sym *sym; 3832 unsigned int r_type; 3833 bfd_vma value; 3834 asection *sym_sec; 3835 bfd_byte *hit_addr; 3836 bfd_boolean dynamic_symbol_p; 3837 bfd_boolean undef_weak_ref; 3838 3839 r_type = ELFNN_R_TYPE (rel->r_info); 3840 if (r_type > R_IA64_MAX_RELOC_CODE) 3841 { 3842 (*_bfd_error_handler) 3843 (_("%B: unknown relocation type %d"), 3844 input_bfd, (int) r_type); 3845 bfd_set_error (bfd_error_bad_value); 3846 ret_val = FALSE; 3847 continue; 3848 } 3849 3850 howto = ia64_elf_lookup_howto (r_type); 3851 r_symndx = ELFNN_R_SYM (rel->r_info); 3852 h = NULL; 3853 sym = NULL; 3854 sym_sec = NULL; 3855 undef_weak_ref = FALSE; 3856 3857 if (r_symndx < symtab_hdr->sh_info) 3858 { 3859 /* Reloc against local symbol. */ 3860 asection *msec; 3861 sym = local_syms + r_symndx; 3862 sym_sec = local_sections[r_symndx]; 3863 msec = sym_sec; 3864 value = _bfd_elf_rela_local_sym (output_bfd, sym, &msec, rel); 3865 if (!bfd_link_relocatable (info) 3866 && (sym_sec->flags & SEC_MERGE) != 0 3867 && ELF_ST_TYPE (sym->st_info) == STT_SECTION 3868 && sym_sec->sec_info_type == SEC_INFO_TYPE_MERGE) 3869 { 3870 struct elfNN_ia64_local_hash_entry *loc_h; 3871 3872 loc_h = get_local_sym_hash (ia64_info, input_bfd, rel, FALSE); 3873 if (loc_h && ! loc_h->sec_merge_done) 3874 { 3875 struct elfNN_ia64_dyn_sym_info *dynent; 3876 unsigned int count; 3877 3878 for (count = loc_h->count, dynent = loc_h->info; 3879 count != 0; 3880 count--, dynent++) 3881 { 3882 msec = sym_sec; 3883 dynent->addend = 3884 _bfd_merged_section_offset (output_bfd, &msec, 3885 elf_section_data (msec)-> 3886 sec_info, 3887 sym->st_value 3888 + dynent->addend); 3889 dynent->addend -= sym->st_value; 3890 dynent->addend += msec->output_section->vma 3891 + msec->output_offset 3892 - sym_sec->output_section->vma 3893 - sym_sec->output_offset; 3894 } 3895 3896 /* We may have introduced duplicated entries. We need 3897 to remove them properly. */ 3898 count = sort_dyn_sym_info (loc_h->info, loc_h->count); 3899 if (count != loc_h->count) 3900 { 3901 loc_h->count = count; 3902 loc_h->sorted_count = count; 3903 } 3904 3905 loc_h->sec_merge_done = 1; 3906 } 3907 } 3908 } 3909 else 3910 { 3911 bfd_boolean unresolved_reloc; 3912 bfd_boolean warned, ignored; 3913 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd); 3914 3915 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 3916 r_symndx, symtab_hdr, sym_hashes, 3917 h, sym_sec, value, 3918 unresolved_reloc, warned, ignored); 3919 3920 if (h->root.type == bfd_link_hash_undefweak) 3921 undef_weak_ref = TRUE; 3922 else if (warned || (ignored && bfd_link_executable (info))) 3923 continue; 3924 } 3925 3926 if (sym_sec != NULL && discarded_section (sym_sec)) 3927 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, 3928 rel, 1, relend, howto, 0, contents); 3929 3930 if (bfd_link_relocatable (info)) 3931 continue; 3932 3933 hit_addr = contents + rel->r_offset; 3934 value += rel->r_addend; 3935 dynamic_symbol_p = elfNN_ia64_dynamic_symbol_p (h, info, r_type); 3936 3937 switch (r_type) 3938 { 3939 case R_IA64_NONE: 3940 case R_IA64_LDXMOV: 3941 continue; 3942 3943 case R_IA64_IMM14: 3944 case R_IA64_IMM22: 3945 case R_IA64_IMM64: 3946 case R_IA64_DIR32MSB: 3947 case R_IA64_DIR32LSB: 3948 case R_IA64_DIR64MSB: 3949 case R_IA64_DIR64LSB: 3950 /* Install a dynamic relocation for this reloc. */ 3951 if ((dynamic_symbol_p || bfd_link_pic (info)) 3952 && r_symndx != STN_UNDEF 3953 && (input_section->flags & SEC_ALLOC) != 0) 3954 { 3955 unsigned int dyn_r_type; 3956 long dynindx; 3957 bfd_vma addend; 3958 3959 BFD_ASSERT (srel != NULL); 3960 3961 switch (r_type) 3962 { 3963 case R_IA64_IMM14: 3964 case R_IA64_IMM22: 3965 case R_IA64_IMM64: 3966 /* ??? People shouldn't be doing non-pic code in 3967 shared libraries nor dynamic executables. */ 3968 (*_bfd_error_handler) 3969 (_("%B: non-pic code with imm relocation against dynamic symbol `%s'"), 3970 input_bfd, 3971 h ? h->root.root.string 3972 : bfd_elf_sym_name (input_bfd, symtab_hdr, sym, 3973 sym_sec)); 3974 ret_val = FALSE; 3975 continue; 3976 3977 default: 3978 break; 3979 } 3980 3981 /* If we don't need dynamic symbol lookup, find a 3982 matching RELATIVE relocation. */ 3983 dyn_r_type = r_type; 3984 if (dynamic_symbol_p) 3985 { 3986 dynindx = h->dynindx; 3987 addend = rel->r_addend; 3988 value = 0; 3989 } 3990 else 3991 { 3992 switch (r_type) 3993 { 3994 case R_IA64_DIR32MSB: 3995 dyn_r_type = R_IA64_REL32MSB; 3996 break; 3997 case R_IA64_DIR32LSB: 3998 dyn_r_type = R_IA64_REL32LSB; 3999 break; 4000 case R_IA64_DIR64MSB: 4001 dyn_r_type = R_IA64_REL64MSB; 4002 break; 4003 case R_IA64_DIR64LSB: 4004 dyn_r_type = R_IA64_REL64LSB; 4005 break; 4006 4007 default: 4008 break; 4009 } 4010 dynindx = 0; 4011 addend = value; 4012 } 4013 4014 elfNN_ia64_install_dyn_reloc (output_bfd, info, input_section, 4015 srel, rel->r_offset, dyn_r_type, 4016 dynindx, addend); 4017 } 4018 /* Fall through. */ 4019 4020 case R_IA64_LTV32MSB: 4021 case R_IA64_LTV32LSB: 4022 case R_IA64_LTV64MSB: 4023 case R_IA64_LTV64LSB: 4024 r = ia64_elf_install_value (hit_addr, value, r_type); 4025 break; 4026 4027 case R_IA64_GPREL22: 4028 case R_IA64_GPREL64I: 4029 case R_IA64_GPREL32MSB: 4030 case R_IA64_GPREL32LSB: 4031 case R_IA64_GPREL64MSB: 4032 case R_IA64_GPREL64LSB: 4033 if (dynamic_symbol_p) 4034 { 4035 (*_bfd_error_handler) 4036 (_("%B: @gprel relocation against dynamic symbol %s"), 4037 input_bfd, 4038 h ? h->root.root.string 4039 : bfd_elf_sym_name (input_bfd, symtab_hdr, sym, 4040 sym_sec)); 4041 ret_val = FALSE; 4042 continue; 4043 } 4044 value -= gp_val; 4045 r = ia64_elf_install_value (hit_addr, value, r_type); 4046 break; 4047 4048 case R_IA64_LTOFF22: 4049 case R_IA64_LTOFF22X: 4050 case R_IA64_LTOFF64I: 4051 dyn_i = get_dyn_sym_info (ia64_info, h, input_bfd, rel, FALSE); 4052 value = set_got_entry (input_bfd, info, dyn_i, (h ? h->dynindx : -1), 4053 rel->r_addend, value, R_IA64_DIRNNLSB); 4054 value -= gp_val; 4055 r = ia64_elf_install_value (hit_addr, value, r_type); 4056 break; 4057 4058 case R_IA64_PLTOFF22: 4059 case R_IA64_PLTOFF64I: 4060 case R_IA64_PLTOFF64MSB: 4061 case R_IA64_PLTOFF64LSB: 4062 dyn_i = get_dyn_sym_info (ia64_info, h, input_bfd, rel, FALSE); 4063 value = set_pltoff_entry (output_bfd, info, dyn_i, value, FALSE); 4064 value -= gp_val; 4065 r = ia64_elf_install_value (hit_addr, value, r_type); 4066 break; 4067 4068 case R_IA64_FPTR64I: 4069 case R_IA64_FPTR32MSB: 4070 case R_IA64_FPTR32LSB: 4071 case R_IA64_FPTR64MSB: 4072 case R_IA64_FPTR64LSB: 4073 dyn_i = get_dyn_sym_info (ia64_info, h, input_bfd, rel, FALSE); 4074 if (dyn_i->want_fptr) 4075 { 4076 if (!undef_weak_ref) 4077 value = set_fptr_entry (output_bfd, info, dyn_i, value); 4078 } 4079 if (!dyn_i->want_fptr || bfd_link_pie (info)) 4080 { 4081 long dynindx; 4082 unsigned int dyn_r_type = r_type; 4083 bfd_vma addend = rel->r_addend; 4084 4085 /* Otherwise, we expect the dynamic linker to create 4086 the entry. */ 4087 4088 if (dyn_i->want_fptr) 4089 { 4090 if (r_type == R_IA64_FPTR64I) 4091 { 4092 /* We can't represent this without a dynamic symbol. 4093 Adjust the relocation to be against an output 4094 section symbol, which are always present in the 4095 dynamic symbol table. */ 4096 /* ??? People shouldn't be doing non-pic code in 4097 shared libraries. Hork. */ 4098 (*_bfd_error_handler) 4099 (_("%B: linking non-pic code in a position independent executable"), 4100 input_bfd); 4101 ret_val = FALSE; 4102 continue; 4103 } 4104 dynindx = 0; 4105 addend = value; 4106 dyn_r_type = r_type + R_IA64_RELNNLSB - R_IA64_FPTRNNLSB; 4107 } 4108 else if (h) 4109 { 4110 if (h->dynindx != -1) 4111 dynindx = h->dynindx; 4112 else 4113 dynindx = (_bfd_elf_link_lookup_local_dynindx 4114 (info, h->root.u.def.section->owner, 4115 global_sym_index (h))); 4116 value = 0; 4117 } 4118 else 4119 { 4120 dynindx = (_bfd_elf_link_lookup_local_dynindx 4121 (info, input_bfd, (long) r_symndx)); 4122 value = 0; 4123 } 4124 4125 elfNN_ia64_install_dyn_reloc (output_bfd, info, input_section, 4126 srel, rel->r_offset, dyn_r_type, 4127 dynindx, addend); 4128 } 4129 4130 r = ia64_elf_install_value (hit_addr, value, r_type); 4131 break; 4132 4133 case R_IA64_LTOFF_FPTR22: 4134 case R_IA64_LTOFF_FPTR64I: 4135 case R_IA64_LTOFF_FPTR32MSB: 4136 case R_IA64_LTOFF_FPTR32LSB: 4137 case R_IA64_LTOFF_FPTR64MSB: 4138 case R_IA64_LTOFF_FPTR64LSB: 4139 { 4140 long dynindx; 4141 4142 dyn_i = get_dyn_sym_info (ia64_info, h, input_bfd, rel, FALSE); 4143 if (dyn_i->want_fptr) 4144 { 4145 BFD_ASSERT (h == NULL || h->dynindx == -1); 4146 if (!undef_weak_ref) 4147 value = set_fptr_entry (output_bfd, info, dyn_i, value); 4148 dynindx = -1; 4149 } 4150 else 4151 { 4152 /* Otherwise, we expect the dynamic linker to create 4153 the entry. */ 4154 if (h) 4155 { 4156 if (h->dynindx != -1) 4157 dynindx = h->dynindx; 4158 else 4159 dynindx = (_bfd_elf_link_lookup_local_dynindx 4160 (info, h->root.u.def.section->owner, 4161 global_sym_index (h))); 4162 } 4163 else 4164 dynindx = (_bfd_elf_link_lookup_local_dynindx 4165 (info, input_bfd, (long) r_symndx)); 4166 value = 0; 4167 } 4168 4169 value = set_got_entry (output_bfd, info, dyn_i, dynindx, 4170 rel->r_addend, value, R_IA64_FPTRNNLSB); 4171 value -= gp_val; 4172 r = ia64_elf_install_value (hit_addr, value, r_type); 4173 } 4174 break; 4175 4176 case R_IA64_PCREL32MSB: 4177 case R_IA64_PCREL32LSB: 4178 case R_IA64_PCREL64MSB: 4179 case R_IA64_PCREL64LSB: 4180 /* Install a dynamic relocation for this reloc. */ 4181 if (dynamic_symbol_p && r_symndx != STN_UNDEF) 4182 { 4183 BFD_ASSERT (srel != NULL); 4184 4185 elfNN_ia64_install_dyn_reloc (output_bfd, info, input_section, 4186 srel, rel->r_offset, r_type, 4187 h->dynindx, rel->r_addend); 4188 } 4189 goto finish_pcrel; 4190 4191 case R_IA64_PCREL21B: 4192 case R_IA64_PCREL60B: 4193 /* We should have created a PLT entry for any dynamic symbol. */ 4194 dyn_i = NULL; 4195 if (h) 4196 dyn_i = get_dyn_sym_info (ia64_info, h, NULL, NULL, FALSE); 4197 4198 if (dyn_i && dyn_i->want_plt2) 4199 { 4200 /* Should have caught this earlier. */ 4201 BFD_ASSERT (rel->r_addend == 0); 4202 4203 value = (ia64_info->root.splt->output_section->vma 4204 + ia64_info->root.splt->output_offset 4205 + dyn_i->plt2_offset); 4206 } 4207 else 4208 { 4209 /* Since there's no PLT entry, Validate that this is 4210 locally defined. */ 4211 BFD_ASSERT (undef_weak_ref || sym_sec->output_section != NULL); 4212 4213 /* If the symbol is undef_weak, we shouldn't be trying 4214 to call it. There's every chance that we'd wind up 4215 with an out-of-range fixup here. Don't bother setting 4216 any value at all. */ 4217 if (undef_weak_ref) 4218 continue; 4219 } 4220 goto finish_pcrel; 4221 4222 case R_IA64_PCREL21BI: 4223 case R_IA64_PCREL21F: 4224 case R_IA64_PCREL21M: 4225 case R_IA64_PCREL22: 4226 case R_IA64_PCREL64I: 4227 /* The PCREL21BI reloc is specifically not intended for use with 4228 dynamic relocs. PCREL21F and PCREL21M are used for speculation 4229 fixup code, and thus probably ought not be dynamic. The 4230 PCREL22 and PCREL64I relocs aren't emitted as dynamic relocs. */ 4231 if (dynamic_symbol_p) 4232 { 4233 const char *msg; 4234 4235 if (r_type == R_IA64_PCREL21BI) 4236 msg = _("%B: @internal branch to dynamic symbol %s"); 4237 else if (r_type == R_IA64_PCREL21F || r_type == R_IA64_PCREL21M) 4238 msg = _("%B: speculation fixup to dynamic symbol %s"); 4239 else 4240 msg = _("%B: @pcrel relocation against dynamic symbol %s"); 4241 (*_bfd_error_handler) (msg, input_bfd, 4242 h ? h->root.root.string 4243 : bfd_elf_sym_name (input_bfd, 4244 symtab_hdr, 4245 sym, 4246 sym_sec)); 4247 ret_val = FALSE; 4248 continue; 4249 } 4250 goto finish_pcrel; 4251 4252 finish_pcrel: 4253 /* Make pc-relative. */ 4254 value -= (input_section->output_section->vma 4255 + input_section->output_offset 4256 + rel->r_offset) & ~ (bfd_vma) 0x3; 4257 r = ia64_elf_install_value (hit_addr, value, r_type); 4258 break; 4259 4260 case R_IA64_SEGREL32MSB: 4261 case R_IA64_SEGREL32LSB: 4262 case R_IA64_SEGREL64MSB: 4263 case R_IA64_SEGREL64LSB: 4264 { 4265 /* Find the segment that contains the output_section. */ 4266 Elf_Internal_Phdr *p = _bfd_elf_find_segment_containing_section 4267 (output_bfd, input_section->output_section); 4268 4269 if (p == NULL) 4270 { 4271 r = bfd_reloc_notsupported; 4272 } 4273 else 4274 { 4275 /* The VMA of the segment is the vaddr of the associated 4276 program header. */ 4277 if (value > p->p_vaddr) 4278 value -= p->p_vaddr; 4279 else 4280 value = 0; 4281 r = ia64_elf_install_value (hit_addr, value, r_type); 4282 } 4283 break; 4284 } 4285 4286 case R_IA64_SECREL32MSB: 4287 case R_IA64_SECREL32LSB: 4288 case R_IA64_SECREL64MSB: 4289 case R_IA64_SECREL64LSB: 4290 /* Make output-section relative to section where the symbol 4291 is defined. PR 475 */ 4292 if (sym_sec) 4293 value -= sym_sec->output_section->vma; 4294 r = ia64_elf_install_value (hit_addr, value, r_type); 4295 break; 4296 4297 case R_IA64_IPLTMSB: 4298 case R_IA64_IPLTLSB: 4299 /* Install a dynamic relocation for this reloc. */ 4300 if ((dynamic_symbol_p || bfd_link_pic (info)) 4301 && (input_section->flags & SEC_ALLOC) != 0) 4302 { 4303 BFD_ASSERT (srel != NULL); 4304 4305 /* If we don't need dynamic symbol lookup, install two 4306 RELATIVE relocations. */ 4307 if (!dynamic_symbol_p) 4308 { 4309 unsigned int dyn_r_type; 4310 4311 if (r_type == R_IA64_IPLTMSB) 4312 dyn_r_type = R_IA64_REL64MSB; 4313 else 4314 dyn_r_type = R_IA64_REL64LSB; 4315 4316 elfNN_ia64_install_dyn_reloc (output_bfd, info, 4317 input_section, 4318 srel, rel->r_offset, 4319 dyn_r_type, 0, value); 4320 elfNN_ia64_install_dyn_reloc (output_bfd, info, 4321 input_section, 4322 srel, rel->r_offset + 8, 4323 dyn_r_type, 0, gp_val); 4324 } 4325 else 4326 elfNN_ia64_install_dyn_reloc (output_bfd, info, input_section, 4327 srel, rel->r_offset, r_type, 4328 h->dynindx, rel->r_addend); 4329 } 4330 4331 if (r_type == R_IA64_IPLTMSB) 4332 r_type = R_IA64_DIR64MSB; 4333 else 4334 r_type = R_IA64_DIR64LSB; 4335 ia64_elf_install_value (hit_addr, value, r_type); 4336 r = ia64_elf_install_value (hit_addr + 8, gp_val, r_type); 4337 break; 4338 4339 case R_IA64_TPREL14: 4340 case R_IA64_TPREL22: 4341 case R_IA64_TPREL64I: 4342 if (elf_hash_table (info)->tls_sec == NULL) 4343 goto missing_tls_sec; 4344 value -= elfNN_ia64_tprel_base (info); 4345 r = ia64_elf_install_value (hit_addr, value, r_type); 4346 break; 4347 4348 case R_IA64_DTPREL14: 4349 case R_IA64_DTPREL22: 4350 case R_IA64_DTPREL64I: 4351 case R_IA64_DTPREL32LSB: 4352 case R_IA64_DTPREL32MSB: 4353 case R_IA64_DTPREL64LSB: 4354 case R_IA64_DTPREL64MSB: 4355 if (elf_hash_table (info)->tls_sec == NULL) 4356 goto missing_tls_sec; 4357 value -= elfNN_ia64_dtprel_base (info); 4358 r = ia64_elf_install_value (hit_addr, value, r_type); 4359 break; 4360 4361 case R_IA64_LTOFF_TPREL22: 4362 case R_IA64_LTOFF_DTPMOD22: 4363 case R_IA64_LTOFF_DTPREL22: 4364 { 4365 int got_r_type; 4366 long dynindx = h ? h->dynindx : -1; 4367 bfd_vma r_addend = rel->r_addend; 4368 4369 switch (r_type) 4370 { 4371 default: 4372 case R_IA64_LTOFF_TPREL22: 4373 if (!dynamic_symbol_p) 4374 { 4375 if (elf_hash_table (info)->tls_sec == NULL) 4376 goto missing_tls_sec; 4377 if (!bfd_link_pic (info)) 4378 value -= elfNN_ia64_tprel_base (info); 4379 else 4380 { 4381 r_addend += value - elfNN_ia64_dtprel_base (info); 4382 dynindx = 0; 4383 } 4384 } 4385 got_r_type = R_IA64_TPREL64LSB; 4386 break; 4387 case R_IA64_LTOFF_DTPMOD22: 4388 if (!dynamic_symbol_p && !bfd_link_pic (info)) 4389 value = 1; 4390 got_r_type = R_IA64_DTPMOD64LSB; 4391 break; 4392 case R_IA64_LTOFF_DTPREL22: 4393 if (!dynamic_symbol_p) 4394 { 4395 if (elf_hash_table (info)->tls_sec == NULL) 4396 goto missing_tls_sec; 4397 value -= elfNN_ia64_dtprel_base (info); 4398 } 4399 got_r_type = R_IA64_DTPRELNNLSB; 4400 break; 4401 } 4402 dyn_i = get_dyn_sym_info (ia64_info, h, input_bfd, rel, FALSE); 4403 value = set_got_entry (input_bfd, info, dyn_i, dynindx, r_addend, 4404 value, got_r_type); 4405 value -= gp_val; 4406 r = ia64_elf_install_value (hit_addr, value, r_type); 4407 } 4408 break; 4409 4410 default: 4411 r = bfd_reloc_notsupported; 4412 break; 4413 } 4414 4415 switch (r) 4416 { 4417 case bfd_reloc_ok: 4418 break; 4419 4420 case bfd_reloc_undefined: 4421 /* This can happen for global table relative relocs if 4422 __gp is undefined. This is a panic situation so we 4423 don't try to continue. */ 4424 (*info->callbacks->undefined_symbol) 4425 (info, "__gp", input_bfd, input_section, rel->r_offset, 1); 4426 return FALSE; 4427 4428 case bfd_reloc_notsupported: 4429 { 4430 const char *name; 4431 4432 if (h) 4433 name = h->root.root.string; 4434 else 4435 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, 4436 sym_sec); 4437 (*info->callbacks->warning) (info, _("unsupported reloc"), 4438 name, input_bfd, 4439 input_section, rel->r_offset); 4440 ret_val = FALSE; 4441 } 4442 break; 4443 4444 case bfd_reloc_dangerous: 4445 case bfd_reloc_outofrange: 4446 case bfd_reloc_overflow: 4447 default: 4448 missing_tls_sec: 4449 { 4450 const char *name; 4451 4452 if (h) 4453 name = h->root.root.string; 4454 else 4455 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, 4456 sym_sec); 4457 4458 switch (r_type) 4459 { 4460 case R_IA64_TPREL14: 4461 case R_IA64_TPREL22: 4462 case R_IA64_TPREL64I: 4463 case R_IA64_DTPREL14: 4464 case R_IA64_DTPREL22: 4465 case R_IA64_DTPREL64I: 4466 case R_IA64_DTPREL32LSB: 4467 case R_IA64_DTPREL32MSB: 4468 case R_IA64_DTPREL64LSB: 4469 case R_IA64_DTPREL64MSB: 4470 case R_IA64_LTOFF_TPREL22: 4471 case R_IA64_LTOFF_DTPMOD22: 4472 case R_IA64_LTOFF_DTPREL22: 4473 (*_bfd_error_handler) 4474 (_("%B: missing TLS section for relocation %s against `%s' at 0x%lx in section `%A'."), 4475 input_bfd, input_section, howto->name, name, 4476 rel->r_offset); 4477 break; 4478 4479 case R_IA64_PCREL21B: 4480 case R_IA64_PCREL21BI: 4481 case R_IA64_PCREL21M: 4482 case R_IA64_PCREL21F: 4483 if (is_elf_hash_table (info->hash)) 4484 { 4485 /* Relaxtion is always performed for ELF output. 4486 Overflow failures for those relocations mean 4487 that the section is too big to relax. */ 4488 (*_bfd_error_handler) 4489 (_("%B: Can't relax br (%s) to `%s' at 0x%lx in section `%A' with size 0x%lx (> 0x1000000)."), 4490 input_bfd, input_section, howto->name, name, 4491 rel->r_offset, input_section->size); 4492 break; 4493 } 4494 default: 4495 (*info->callbacks->reloc_overflow) (info, 4496 &h->root, 4497 name, 4498 howto->name, 4499 (bfd_vma) 0, 4500 input_bfd, 4501 input_section, 4502 rel->r_offset); 4503 break; 4504 } 4505 4506 ret_val = FALSE; 4507 } 4508 break; 4509 } 4510 } 4511 4512 return ret_val; 4513 } 4514 4515 static bfd_boolean 4516 elfNN_ia64_finish_dynamic_symbol (bfd *output_bfd, 4517 struct bfd_link_info *info, 4518 struct elf_link_hash_entry *h, 4519 Elf_Internal_Sym *sym) 4520 { 4521 struct elfNN_ia64_link_hash_table *ia64_info; 4522 struct elfNN_ia64_dyn_sym_info *dyn_i; 4523 4524 ia64_info = elfNN_ia64_hash_table (info); 4525 if (ia64_info == NULL) 4526 return FALSE; 4527 4528 dyn_i = get_dyn_sym_info (ia64_info, h, NULL, NULL, FALSE); 4529 4530 /* Fill in the PLT data, if required. */ 4531 if (dyn_i && dyn_i->want_plt) 4532 { 4533 Elf_Internal_Rela outrel; 4534 bfd_byte *loc; 4535 asection *plt_sec; 4536 bfd_vma plt_addr, pltoff_addr, gp_val, plt_index; 4537 4538 gp_val = _bfd_get_gp_value (output_bfd); 4539 4540 /* Initialize the minimal PLT entry. */ 4541 4542 plt_index = (dyn_i->plt_offset - PLT_HEADER_SIZE) / PLT_MIN_ENTRY_SIZE; 4543 plt_sec = ia64_info->root.splt; 4544 loc = plt_sec->contents + dyn_i->plt_offset; 4545 4546 memcpy (loc, plt_min_entry, PLT_MIN_ENTRY_SIZE); 4547 ia64_elf_install_value (loc, plt_index, R_IA64_IMM22); 4548 ia64_elf_install_value (loc+2, -dyn_i->plt_offset, R_IA64_PCREL21B); 4549 4550 plt_addr = (plt_sec->output_section->vma 4551 + plt_sec->output_offset 4552 + dyn_i->plt_offset); 4553 pltoff_addr = set_pltoff_entry (output_bfd, info, dyn_i, plt_addr, TRUE); 4554 4555 /* Initialize the FULL PLT entry, if needed. */ 4556 if (dyn_i->want_plt2) 4557 { 4558 loc = plt_sec->contents + dyn_i->plt2_offset; 4559 4560 memcpy (loc, plt_full_entry, PLT_FULL_ENTRY_SIZE); 4561 ia64_elf_install_value (loc, pltoff_addr - gp_val, R_IA64_IMM22); 4562 4563 /* Mark the symbol as undefined, rather than as defined in the 4564 plt section. Leave the value alone. */ 4565 /* ??? We didn't redefine it in adjust_dynamic_symbol in the 4566 first place. But perhaps elflink.c did some for us. */ 4567 if (!h->def_regular) 4568 sym->st_shndx = SHN_UNDEF; 4569 } 4570 4571 /* Create the dynamic relocation. */ 4572 outrel.r_offset = pltoff_addr; 4573 if (bfd_little_endian (output_bfd)) 4574 outrel.r_info = ELFNN_R_INFO (h->dynindx, R_IA64_IPLTLSB); 4575 else 4576 outrel.r_info = ELFNN_R_INFO (h->dynindx, R_IA64_IPLTMSB); 4577 outrel.r_addend = 0; 4578 4579 /* This is fun. In the .IA_64.pltoff section, we've got entries 4580 that correspond both to real PLT entries, and those that 4581 happened to resolve to local symbols but need to be created 4582 to satisfy @pltoff relocations. The .rela.IA_64.pltoff 4583 relocations for the real PLT should come at the end of the 4584 section, so that they can be indexed by plt entry at runtime. 4585 4586 We emitted all of the relocations for the non-PLT @pltoff 4587 entries during relocate_section. So we can consider the 4588 existing sec->reloc_count to be the base of the array of 4589 PLT relocations. */ 4590 4591 loc = ia64_info->rel_pltoff_sec->contents; 4592 loc += ((ia64_info->rel_pltoff_sec->reloc_count + plt_index) 4593 * sizeof (ElfNN_External_Rela)); 4594 bfd_elfNN_swap_reloca_out (output_bfd, &outrel, loc); 4595 } 4596 4597 /* Mark some specially defined symbols as absolute. */ 4598 if (h == ia64_info->root.hdynamic 4599 || h == ia64_info->root.hgot 4600 || h == ia64_info->root.hplt) 4601 sym->st_shndx = SHN_ABS; 4602 4603 return TRUE; 4604 } 4605 4606 static bfd_boolean 4607 elfNN_ia64_finish_dynamic_sections (bfd *abfd, 4608 struct bfd_link_info *info) 4609 { 4610 struct elfNN_ia64_link_hash_table *ia64_info; 4611 bfd *dynobj; 4612 4613 ia64_info = elfNN_ia64_hash_table (info); 4614 if (ia64_info == NULL) 4615 return FALSE; 4616 4617 dynobj = ia64_info->root.dynobj; 4618 4619 if (elf_hash_table (info)->dynamic_sections_created) 4620 { 4621 ElfNN_External_Dyn *dyncon, *dynconend; 4622 asection *sdyn, *sgotplt; 4623 bfd_vma gp_val; 4624 4625 sdyn = bfd_get_linker_section (dynobj, ".dynamic"); 4626 sgotplt = bfd_get_linker_section (dynobj, ".got.plt"); 4627 BFD_ASSERT (sdyn != NULL); 4628 dyncon = (ElfNN_External_Dyn *) sdyn->contents; 4629 dynconend = (ElfNN_External_Dyn *) (sdyn->contents + sdyn->size); 4630 4631 gp_val = _bfd_get_gp_value (abfd); 4632 4633 for (; dyncon < dynconend; dyncon++) 4634 { 4635 Elf_Internal_Dyn dyn; 4636 4637 bfd_elfNN_swap_dyn_in (dynobj, dyncon, &dyn); 4638 4639 switch (dyn.d_tag) 4640 { 4641 case DT_PLTGOT: 4642 dyn.d_un.d_ptr = gp_val; 4643 break; 4644 4645 case DT_PLTRELSZ: 4646 dyn.d_un.d_val = (ia64_info->minplt_entries 4647 * sizeof (ElfNN_External_Rela)); 4648 break; 4649 4650 case DT_JMPREL: 4651 /* See the comment above in finish_dynamic_symbol. */ 4652 dyn.d_un.d_ptr = (ia64_info->rel_pltoff_sec->output_section->vma 4653 + ia64_info->rel_pltoff_sec->output_offset 4654 + (ia64_info->rel_pltoff_sec->reloc_count 4655 * sizeof (ElfNN_External_Rela))); 4656 break; 4657 4658 case DT_IA_64_PLT_RESERVE: 4659 dyn.d_un.d_ptr = (sgotplt->output_section->vma 4660 + sgotplt->output_offset); 4661 break; 4662 4663 case DT_RELASZ: 4664 /* Do not have RELASZ include JMPREL. This makes things 4665 easier on ld.so. This is not what the rest of BFD set up. */ 4666 dyn.d_un.d_val -= (ia64_info->minplt_entries 4667 * sizeof (ElfNN_External_Rela)); 4668 break; 4669 } 4670 4671 bfd_elfNN_swap_dyn_out (abfd, &dyn, dyncon); 4672 } 4673 4674 /* Initialize the PLT0 entry. */ 4675 if (ia64_info->root.splt) 4676 { 4677 bfd_byte *loc = ia64_info->root.splt->contents; 4678 bfd_vma pltres; 4679 4680 memcpy (loc, plt_header, PLT_HEADER_SIZE); 4681 4682 pltres = (sgotplt->output_section->vma 4683 + sgotplt->output_offset 4684 - gp_val); 4685 4686 ia64_elf_install_value (loc+1, pltres, R_IA64_GPREL22); 4687 } 4688 } 4689 4690 return TRUE; 4691 } 4692 4693 /* ELF file flag handling: */ 4695 4696 /* Function to keep IA-64 specific file flags. */ 4697 static bfd_boolean 4698 elfNN_ia64_set_private_flags (bfd *abfd, flagword flags) 4699 { 4700 BFD_ASSERT (!elf_flags_init (abfd) 4701 || elf_elfheader (abfd)->e_flags == flags); 4702 4703 elf_elfheader (abfd)->e_flags = flags; 4704 elf_flags_init (abfd) = TRUE; 4705 return TRUE; 4706 } 4707 4708 /* Merge backend specific data from an object file to the output 4709 object file when linking. */ 4710 static bfd_boolean 4711 elfNN_ia64_merge_private_bfd_data (bfd *ibfd, bfd *obfd) 4712 { 4713 flagword out_flags; 4714 flagword in_flags; 4715 bfd_boolean ok = TRUE; 4716 4717 /* Don't even pretend to support mixed-format linking. */ 4718 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour 4719 || bfd_get_flavour (obfd) != bfd_target_elf_flavour) 4720 return FALSE; 4721 4722 in_flags = elf_elfheader (ibfd)->e_flags; 4723 out_flags = elf_elfheader (obfd)->e_flags; 4724 4725 if (! elf_flags_init (obfd)) 4726 { 4727 elf_flags_init (obfd) = TRUE; 4728 elf_elfheader (obfd)->e_flags = in_flags; 4729 4730 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) 4731 && bfd_get_arch_info (obfd)->the_default) 4732 { 4733 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), 4734 bfd_get_mach (ibfd)); 4735 } 4736 4737 return TRUE; 4738 } 4739 4740 /* Check flag compatibility. */ 4741 if (in_flags == out_flags) 4742 return TRUE; 4743 4744 /* Output has EF_IA_64_REDUCEDFP set only if all inputs have it set. */ 4745 if (!(in_flags & EF_IA_64_REDUCEDFP) && (out_flags & EF_IA_64_REDUCEDFP)) 4746 elf_elfheader (obfd)->e_flags &= ~EF_IA_64_REDUCEDFP; 4747 4748 if ((in_flags & EF_IA_64_TRAPNIL) != (out_flags & EF_IA_64_TRAPNIL)) 4749 { 4750 (*_bfd_error_handler) 4751 (_("%B: linking trap-on-NULL-dereference with non-trapping files"), 4752 ibfd); 4753 4754 bfd_set_error (bfd_error_bad_value); 4755 ok = FALSE; 4756 } 4757 if ((in_flags & EF_IA_64_BE) != (out_flags & EF_IA_64_BE)) 4758 { 4759 (*_bfd_error_handler) 4760 (_("%B: linking big-endian files with little-endian files"), 4761 ibfd); 4762 4763 bfd_set_error (bfd_error_bad_value); 4764 ok = FALSE; 4765 } 4766 if ((in_flags & EF_IA_64_ABI64) != (out_flags & EF_IA_64_ABI64)) 4767 { 4768 (*_bfd_error_handler) 4769 (_("%B: linking 64-bit files with 32-bit files"), 4770 ibfd); 4771 4772 bfd_set_error (bfd_error_bad_value); 4773 ok = FALSE; 4774 } 4775 if ((in_flags & EF_IA_64_CONS_GP) != (out_flags & EF_IA_64_CONS_GP)) 4776 { 4777 (*_bfd_error_handler) 4778 (_("%B: linking constant-gp files with non-constant-gp files"), 4779 ibfd); 4780 4781 bfd_set_error (bfd_error_bad_value); 4782 ok = FALSE; 4783 } 4784 if ((in_flags & EF_IA_64_NOFUNCDESC_CONS_GP) 4785 != (out_flags & EF_IA_64_NOFUNCDESC_CONS_GP)) 4786 { 4787 (*_bfd_error_handler) 4788 (_("%B: linking auto-pic files with non-auto-pic files"), 4789 ibfd); 4790 4791 bfd_set_error (bfd_error_bad_value); 4792 ok = FALSE; 4793 } 4794 4795 return ok; 4796 } 4797 4798 static bfd_boolean 4799 elfNN_ia64_print_private_bfd_data (bfd *abfd, void * ptr) 4800 { 4801 FILE *file = (FILE *) ptr; 4802 flagword flags = elf_elfheader (abfd)->e_flags; 4803 4804 BFD_ASSERT (abfd != NULL && ptr != NULL); 4805 4806 fprintf (file, "private flags = %s%s%s%s%s%s%s%s\n", 4807 (flags & EF_IA_64_TRAPNIL) ? "TRAPNIL, " : "", 4808 (flags & EF_IA_64_EXT) ? "EXT, " : "", 4809 (flags & EF_IA_64_BE) ? "BE, " : "LE, ", 4810 (flags & EF_IA_64_REDUCEDFP) ? "REDUCEDFP, " : "", 4811 (flags & EF_IA_64_CONS_GP) ? "CONS_GP, " : "", 4812 (flags & EF_IA_64_NOFUNCDESC_CONS_GP) ? "NOFUNCDESC_CONS_GP, " : "", 4813 (flags & EF_IA_64_ABSOLUTE) ? "ABSOLUTE, " : "", 4814 (flags & EF_IA_64_ABI64) ? "ABI64" : "ABI32"); 4815 4816 _bfd_elf_print_private_bfd_data (abfd, ptr); 4817 return TRUE; 4818 } 4819 4820 static enum elf_reloc_type_class 4821 elfNN_ia64_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, 4822 const asection *rel_sec ATTRIBUTE_UNUSED, 4823 const Elf_Internal_Rela *rela) 4824 { 4825 switch ((int) ELFNN_R_TYPE (rela->r_info)) 4826 { 4827 case R_IA64_REL32MSB: 4828 case R_IA64_REL32LSB: 4829 case R_IA64_REL64MSB: 4830 case R_IA64_REL64LSB: 4831 return reloc_class_relative; 4832 case R_IA64_IPLTMSB: 4833 case R_IA64_IPLTLSB: 4834 return reloc_class_plt; 4835 case R_IA64_COPY: 4836 return reloc_class_copy; 4837 default: 4838 return reloc_class_normal; 4839 } 4840 } 4841 4842 static const struct bfd_elf_special_section elfNN_ia64_special_sections[] = 4843 { 4844 { STRING_COMMA_LEN (".sbss"), -1, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_IA_64_SHORT }, 4845 { STRING_COMMA_LEN (".sdata"), -1, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_IA_64_SHORT }, 4846 { NULL, 0, 0, 0, 0 } 4847 }; 4848 4849 static bfd_boolean 4850 elfNN_ia64_object_p (bfd *abfd) 4851 { 4852 asection *sec; 4853 asection *group, *unwi, *unw; 4854 flagword flags; 4855 const char *name; 4856 char *unwi_name, *unw_name; 4857 bfd_size_type amt; 4858 4859 if (abfd->flags & DYNAMIC) 4860 return TRUE; 4861 4862 /* Flags for fake group section. */ 4863 flags = (SEC_LINKER_CREATED | SEC_GROUP | SEC_LINK_ONCE 4864 | SEC_EXCLUDE); 4865 4866 /* We add a fake section group for each .gnu.linkonce.t.* section, 4867 which isn't in a section group, and its unwind sections. */ 4868 for (sec = abfd->sections; sec != NULL; sec = sec->next) 4869 { 4870 if (elf_sec_group (sec) == NULL 4871 && ((sec->flags & (SEC_LINK_ONCE | SEC_CODE | SEC_GROUP)) 4872 == (SEC_LINK_ONCE | SEC_CODE)) 4873 && CONST_STRNEQ (sec->name, ".gnu.linkonce.t.")) 4874 { 4875 name = sec->name + 16; 4876 4877 amt = strlen (name) + sizeof (".gnu.linkonce.ia64unwi."); 4878 unwi_name = bfd_alloc (abfd, amt); 4879 if (!unwi_name) 4880 return FALSE; 4881 4882 strcpy (stpcpy (unwi_name, ".gnu.linkonce.ia64unwi."), name); 4883 unwi = bfd_get_section_by_name (abfd, unwi_name); 4884 4885 amt = strlen (name) + sizeof (".gnu.linkonce.ia64unw."); 4886 unw_name = bfd_alloc (abfd, amt); 4887 if (!unw_name) 4888 return FALSE; 4889 4890 strcpy (stpcpy (unw_name, ".gnu.linkonce.ia64unw."), name); 4891 unw = bfd_get_section_by_name (abfd, unw_name); 4892 4893 /* We need to create a fake group section for it and its 4894 unwind sections. */ 4895 group = bfd_make_section_anyway_with_flags (abfd, name, 4896 flags); 4897 if (group == NULL) 4898 return FALSE; 4899 4900 /* Move the fake group section to the beginning. */ 4901 bfd_section_list_remove (abfd, group); 4902 bfd_section_list_prepend (abfd, group); 4903 4904 elf_next_in_group (group) = sec; 4905 4906 elf_group_name (sec) = name; 4907 elf_next_in_group (sec) = sec; 4908 elf_sec_group (sec) = group; 4909 4910 if (unwi) 4911 { 4912 elf_group_name (unwi) = name; 4913 elf_next_in_group (unwi) = sec; 4914 elf_next_in_group (sec) = unwi; 4915 elf_sec_group (unwi) = group; 4916 } 4917 4918 if (unw) 4919 { 4920 elf_group_name (unw) = name; 4921 if (unwi) 4922 { 4923 elf_next_in_group (unw) = elf_next_in_group (unwi); 4924 elf_next_in_group (unwi) = unw; 4925 } 4926 else 4927 { 4928 elf_next_in_group (unw) = sec; 4929 elf_next_in_group (sec) = unw; 4930 } 4931 elf_sec_group (unw) = group; 4932 } 4933 4934 /* Fake SHT_GROUP section header. */ 4935 elf_section_data (group)->this_hdr.bfd_section = group; 4936 elf_section_data (group)->this_hdr.sh_type = SHT_GROUP; 4937 } 4938 } 4939 return TRUE; 4940 } 4941 4942 static bfd_boolean 4943 elfNN_ia64_hpux_vec (const bfd_target *vec) 4944 { 4945 extern const bfd_target ia64_elfNN_hpux_be_vec; 4946 return (vec == &ia64_elfNN_hpux_be_vec); 4947 } 4948 4949 static void 4950 elfNN_hpux_post_process_headers (bfd *abfd, 4951 struct bfd_link_info *info ATTRIBUTE_UNUSED) 4952 { 4953 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd); 4954 4955 i_ehdrp->e_ident[EI_OSABI] = get_elf_backend_data (abfd)->elf_osabi; 4956 i_ehdrp->e_ident[EI_ABIVERSION] = 1; 4957 } 4958 4959 static bfd_boolean 4960 elfNN_hpux_backend_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED, 4961 asection *sec, int *retval) 4962 { 4963 if (bfd_is_com_section (sec)) 4964 { 4965 *retval = SHN_IA_64_ANSI_COMMON; 4966 return TRUE; 4967 } 4968 return FALSE; 4969 } 4970 4971 static void 4972 elfNN_hpux_backend_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, 4973 asymbol *asym) 4974 { 4975 elf_symbol_type *elfsym = (elf_symbol_type *) asym; 4976 4977 switch (elfsym->internal_elf_sym.st_shndx) 4978 { 4979 case SHN_IA_64_ANSI_COMMON: 4980 asym->section = bfd_com_section_ptr; 4981 asym->value = elfsym->internal_elf_sym.st_size; 4982 asym->flags &= ~BSF_GLOBAL; 4983 break; 4984 } 4985 } 4986 4987 #define TARGET_LITTLE_SYM ia64_elfNN_le_vec 4989 #define TARGET_LITTLE_NAME "elfNN-ia64-little" 4990 #define TARGET_BIG_SYM ia64_elfNN_be_vec 4991 #define TARGET_BIG_NAME "elfNN-ia64-big" 4992 #define ELF_ARCH bfd_arch_ia64 4993 #define ELF_TARGET_ID IA64_ELF_DATA 4994 #define ELF_MACHINE_CODE EM_IA_64 4995 #define ELF_MACHINE_ALT1 1999 /* EAS2.3 */ 4996 #define ELF_MACHINE_ALT2 1998 /* EAS2.2 */ 4997 #define ELF_MAXPAGESIZE 0x10000 /* 64KB */ 4998 #define ELF_COMMONPAGESIZE 0x4000 /* 16KB */ 4999 5000 #define elf_backend_section_from_shdr \ 5001 elfNN_ia64_section_from_shdr 5002 #define elf_backend_section_flags \ 5003 elfNN_ia64_section_flags 5004 #define elf_backend_fake_sections \ 5005 elfNN_ia64_fake_sections 5006 #define elf_backend_final_write_processing \ 5007 elfNN_ia64_final_write_processing 5008 #define elf_backend_add_symbol_hook \ 5009 elfNN_ia64_add_symbol_hook 5010 #define elf_backend_additional_program_headers \ 5011 elfNN_ia64_additional_program_headers 5012 #define elf_backend_modify_segment_map \ 5013 elfNN_ia64_modify_segment_map 5014 #define elf_backend_modify_program_headers \ 5015 elfNN_ia64_modify_program_headers 5016 #define elf_info_to_howto \ 5017 elfNN_ia64_info_to_howto 5018 5019 #define bfd_elfNN_bfd_reloc_type_lookup \ 5020 ia64_elf_reloc_type_lookup 5021 #define bfd_elfNN_bfd_reloc_name_lookup \ 5022 ia64_elf_reloc_name_lookup 5023 #define bfd_elfNN_bfd_is_local_label_name \ 5024 elfNN_ia64_is_local_label_name 5025 #define bfd_elfNN_bfd_relax_section \ 5026 elfNN_ia64_relax_section 5027 5028 #define elf_backend_object_p \ 5029 elfNN_ia64_object_p 5030 5031 /* Stuff for the BFD linker: */ 5032 #define bfd_elfNN_bfd_link_hash_table_create \ 5033 elfNN_ia64_hash_table_create 5034 #define elf_backend_create_dynamic_sections \ 5035 elfNN_ia64_create_dynamic_sections 5036 #define elf_backend_check_relocs \ 5037 elfNN_ia64_check_relocs 5038 #define elf_backend_adjust_dynamic_symbol \ 5039 elfNN_ia64_adjust_dynamic_symbol 5040 #define elf_backend_size_dynamic_sections \ 5041 elfNN_ia64_size_dynamic_sections 5042 #define elf_backend_omit_section_dynsym \ 5043 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true) 5044 #define elf_backend_relocate_section \ 5045 elfNN_ia64_relocate_section 5046 #define elf_backend_finish_dynamic_symbol \ 5047 elfNN_ia64_finish_dynamic_symbol 5048 #define elf_backend_finish_dynamic_sections \ 5049 elfNN_ia64_finish_dynamic_sections 5050 #define bfd_elfNN_bfd_final_link \ 5051 elfNN_ia64_final_link 5052 5053 #define bfd_elfNN_bfd_merge_private_bfd_data \ 5054 elfNN_ia64_merge_private_bfd_data 5055 #define bfd_elfNN_bfd_set_private_flags \ 5056 elfNN_ia64_set_private_flags 5057 #define bfd_elfNN_bfd_print_private_bfd_data \ 5058 elfNN_ia64_print_private_bfd_data 5059 5060 #define elf_backend_plt_readonly 1 5061 #define elf_backend_want_plt_sym 0 5062 #define elf_backend_plt_alignment 5 5063 #define elf_backend_got_header_size 0 5064 #define elf_backend_want_got_plt 1 5065 #define elf_backend_may_use_rel_p 1 5066 #define elf_backend_may_use_rela_p 1 5067 #define elf_backend_default_use_rela_p 1 5068 #define elf_backend_want_dynbss 0 5069 #define elf_backend_copy_indirect_symbol elfNN_ia64_hash_copy_indirect 5070 #define elf_backend_hide_symbol elfNN_ia64_hash_hide_symbol 5071 #define elf_backend_fixup_symbol _bfd_elf_link_hash_fixup_symbol 5072 #define elf_backend_reloc_type_class elfNN_ia64_reloc_type_class 5073 #define elf_backend_rela_normal 1 5074 #define elf_backend_special_sections elfNN_ia64_special_sections 5075 #define elf_backend_default_execstack 0 5076 5077 /* FIXME: PR 290: The Intel C compiler generates SHT_IA_64_UNWIND with 5078 SHF_LINK_ORDER. But it doesn't set the sh_link or sh_info fields. 5079 We don't want to flood users with so many error messages. We turn 5080 off the warning for now. It will be turned on later when the Intel 5081 compiler is fixed. */ 5082 #define elf_backend_link_order_error_handler NULL 5083 5084 #include "elfNN-target.h" 5085 5086 /* HPUX-specific vectors. */ 5087 5088 #undef TARGET_LITTLE_SYM 5089 #undef TARGET_LITTLE_NAME 5090 #undef TARGET_BIG_SYM 5091 #define TARGET_BIG_SYM ia64_elfNN_hpux_be_vec 5092 #undef TARGET_BIG_NAME 5093 #define TARGET_BIG_NAME "elfNN-ia64-hpux-big" 5094 5095 /* These are HP-UX specific functions. */ 5096 5097 #undef elf_backend_post_process_headers 5098 #define elf_backend_post_process_headers elfNN_hpux_post_process_headers 5099 5100 #undef elf_backend_section_from_bfd_section 5101 #define elf_backend_section_from_bfd_section elfNN_hpux_backend_section_from_bfd_section 5102 5103 #undef elf_backend_symbol_processing 5104 #define elf_backend_symbol_processing elfNN_hpux_backend_symbol_processing 5105 5106 #undef elf_backend_want_p_paddr_set_to_zero 5107 #define elf_backend_want_p_paddr_set_to_zero 1 5108 5109 #undef ELF_COMMONPAGESIZE 5110 #undef ELF_OSABI 5111 #define ELF_OSABI ELFOSABI_HPUX 5112 5113 #undef elfNN_bed 5114 #define elfNN_bed elfNN_ia64_hpux_bed 5115 5116 #include "elfNN-target.h" 5117
