1// sparc.cc -- sparc target support for gold. 2 3// Copyright (C) 2008-2020 Free Software Foundation, Inc. 4// Written by David S. Miller <davem@davemloft.net>. 5 6// This file is part of gold. 7 8// This program is free software; you can redistribute it and/or modify 9// it under the terms of the GNU General Public License as published by 10// the Free Software Foundation; either version 3 of the License, or 11// (at your option) any later version. 12 13// This program is distributed in the hope that it will be useful, 14// but WITHOUT ANY WARRANTY; without even the implied warranty of 15// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16// GNU General Public License for more details. 17 18// You should have received a copy of the GNU General Public License 19// along with this program; if not, write to the Free Software 20// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 21// MA 02110-1301, USA. 22 23#include "gold.h" 24 25#include <cstdlib> 26#include <cstdio> 27#include <cstring> 28 29#include "elfcpp.h" 30#include "parameters.h" 31#include "reloc.h" 32#include "sparc.h" 33#include "object.h" 34#include "symtab.h" 35#include "layout.h" 36#include "output.h" 37#include "copy-relocs.h" 38#include "target.h" 39#include "target-reloc.h" 40#include "target-select.h" 41#include "tls.h" 42#include "errors.h" 43#include "gc.h" 44 45namespace 46{ 47 48using namespace gold; 49 50template<int size, bool big_endian> 51class Output_data_plt_sparc; 52 53template<int size, bool big_endian> 54class Target_sparc : public Sized_target<size, big_endian> 55{ 56 public: 57 typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Reloc_section; 58 59 Target_sparc() 60 : Sized_target<size, big_endian>(&sparc_info), 61 got_(NULL), plt_(NULL), rela_dyn_(NULL), rela_ifunc_(NULL), 62 copy_relocs_(elfcpp::R_SPARC_COPY), 63 got_mod_index_offset_(-1U), tls_get_addr_sym_(NULL), 64 elf_machine_(sparc_info.machine_code), elf_flags_(0), 65 elf_flags_set_(false), register_syms_() 66 { 67 } 68 69 // Make a new symbol table entry. 70 Sized_symbol<size>* 71 make_symbol(const char*, elfcpp::STT, Object*, unsigned int, uint64_t); 72 73 // Process the relocations to determine unreferenced sections for 74 // garbage collection. 75 void 76 gc_process_relocs(Symbol_table* symtab, 77 Layout* layout, 78 Sized_relobj_file<size, big_endian>* object, 79 unsigned int data_shndx, 80 unsigned int sh_type, 81 const unsigned char* prelocs, 82 size_t reloc_count, 83 Output_section* output_section, 84 bool needs_special_offset_handling, 85 size_t local_symbol_count, 86 const unsigned char* plocal_symbols); 87 88 // Scan the relocations to look for symbol adjustments. 89 void 90 scan_relocs(Symbol_table* symtab, 91 Layout* layout, 92 Sized_relobj_file<size, big_endian>* object, 93 unsigned int data_shndx, 94 unsigned int sh_type, 95 const unsigned char* prelocs, 96 size_t reloc_count, 97 Output_section* output_section, 98 bool needs_special_offset_handling, 99 size_t local_symbol_count, 100 const unsigned char* plocal_symbols); 101 // Finalize the sections. 102 void 103 do_finalize_sections(Layout*, const Input_objects*, Symbol_table*); 104 105 // Return the value to use for a dynamic which requires special 106 // treatment. 107 uint64_t 108 do_dynsym_value(const Symbol*) const; 109 110 // Relocate a section. 111 void 112 relocate_section(const Relocate_info<size, big_endian>*, 113 unsigned int sh_type, 114 const unsigned char* prelocs, 115 size_t reloc_count, 116 Output_section* output_section, 117 bool needs_special_offset_handling, 118 unsigned char* view, 119 typename elfcpp::Elf_types<size>::Elf_Addr view_address, 120 section_size_type view_size, 121 const Reloc_symbol_changes*); 122 123 // Scan the relocs during a relocatable link. 124 void 125 scan_relocatable_relocs(Symbol_table* symtab, 126 Layout* layout, 127 Sized_relobj_file<size, big_endian>* object, 128 unsigned int data_shndx, 129 unsigned int sh_type, 130 const unsigned char* prelocs, 131 size_t reloc_count, 132 Output_section* output_section, 133 bool needs_special_offset_handling, 134 size_t local_symbol_count, 135 const unsigned char* plocal_symbols, 136 Relocatable_relocs*); 137 138 // Scan the relocs for --emit-relocs. 139 void 140 emit_relocs_scan(Symbol_table* symtab, 141 Layout* layout, 142 Sized_relobj_file<size, big_endian>* object, 143 unsigned int data_shndx, 144 unsigned int sh_type, 145 const unsigned char* prelocs, 146 size_t reloc_count, 147 Output_section* output_section, 148 bool needs_special_offset_handling, 149 size_t local_symbol_count, 150 const unsigned char* plocal_syms, 151 Relocatable_relocs* rr); 152 153 // Emit relocations for a section. 154 void 155 relocate_relocs(const Relocate_info<size, big_endian>*, 156 unsigned int sh_type, 157 const unsigned char* prelocs, 158 size_t reloc_count, 159 Output_section* output_section, 160 typename elfcpp::Elf_types<size>::Elf_Off 161 offset_in_output_section, 162 unsigned char* view, 163 typename elfcpp::Elf_types<size>::Elf_Addr view_address, 164 section_size_type view_size, 165 unsigned char* reloc_view, 166 section_size_type reloc_view_size); 167 168 // Return whether SYM is defined by the ABI. 169 bool 170 do_is_defined_by_abi(const Symbol* sym) const 171 { return strcmp(sym->name(), "___tls_get_addr") == 0; } 172 173 // Return the PLT address to use for a global symbol. 174 uint64_t 175 do_plt_address_for_global(const Symbol* gsym) const 176 { return this->plt_section()->address_for_global(gsym); } 177 178 uint64_t 179 do_plt_address_for_local(const Relobj* relobj, unsigned int symndx) const 180 { return this->plt_section()->address_for_local(relobj, symndx); } 181 182 // Return whether there is a GOT section. 183 bool 184 has_got_section() const 185 { return this->got_ != NULL; } 186 187 // Return the size of the GOT section. 188 section_size_type 189 got_size() const 190 { 191 gold_assert(this->got_ != NULL); 192 return this->got_->data_size(); 193 } 194 195 // Return the number of entries in the GOT. 196 unsigned int 197 got_entry_count() const 198 { 199 if (this->got_ == NULL) 200 return 0; 201 return this->got_size() / (size / 8); 202 } 203 204 // Return the address of the GOT. 205 uint64_t 206 got_address() const 207 { 208 if (this->got_ == NULL) 209 return 0; 210 return this->got_->address(); 211 } 212 213 // Return the number of entries in the PLT. 214 unsigned int 215 plt_entry_count() const; 216 217 // Return the offset of the first non-reserved PLT entry. 218 unsigned int 219 first_plt_entry_offset() const; 220 221 // Return the size of each PLT entry. 222 unsigned int 223 plt_entry_size() const; 224 225 protected: 226 // Make an ELF object. 227 Object* 228 do_make_elf_object(const std::string&, Input_file*, off_t, 229 const elfcpp::Ehdr<size, big_endian>& ehdr); 230 231 void 232 do_adjust_elf_header(unsigned char* view, int len); 233 234 private: 235 236 // The class which scans relocations. 237 class Scan 238 { 239 public: 240 Scan() 241 : issued_non_pic_error_(false) 242 { } 243 244 static inline int 245 get_reference_flags(unsigned int r_type); 246 247 inline void 248 local(Symbol_table* symtab, Layout* layout, Target_sparc* target, 249 Sized_relobj_file<size, big_endian>* object, 250 unsigned int data_shndx, 251 Output_section* output_section, 252 const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, 253 const elfcpp::Sym<size, big_endian>& lsym, 254 bool is_discarded); 255 256 inline void 257 global(Symbol_table* symtab, Layout* layout, Target_sparc* target, 258 Sized_relobj_file<size, big_endian>* object, 259 unsigned int data_shndx, 260 Output_section* output_section, 261 const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, 262 Symbol* gsym); 263 264 inline bool 265 local_reloc_may_be_function_pointer(Symbol_table* , Layout* , 266 Target_sparc* , 267 Sized_relobj_file<size, big_endian>* , 268 unsigned int , 269 Output_section* , 270 const elfcpp::Rela<size, big_endian>& , 271 unsigned int , 272 const elfcpp::Sym<size, big_endian>&) 273 { return false; } 274 275 inline bool 276 global_reloc_may_be_function_pointer(Symbol_table* , Layout* , 277 Target_sparc* , 278 Sized_relobj_file<size, big_endian>* , 279 unsigned int , 280 Output_section* , 281 const elfcpp::Rela<size, 282 big_endian>& , 283 unsigned int , Symbol*) 284 { return false; } 285 286 287 private: 288 static void 289 unsupported_reloc_local(Sized_relobj_file<size, big_endian>*, 290 unsigned int r_type); 291 292 static void 293 unsupported_reloc_global(Sized_relobj_file<size, big_endian>*, 294 unsigned int r_type, Symbol*); 295 296 static void 297 generate_tls_call(Symbol_table* symtab, Layout* layout, 298 Target_sparc* target); 299 300 void 301 check_non_pic(Relobj*, unsigned int r_type); 302 303 bool 304 reloc_needs_plt_for_ifunc(Sized_relobj_file<size, big_endian>*, 305 unsigned int r_type); 306 307 // Whether we have issued an error about a non-PIC compilation. 308 bool issued_non_pic_error_; 309 }; 310 311 // The class which implements relocation. 312 class Relocate 313 { 314 public: 315 Relocate() 316 : ignore_gd_add_(false), reloc_adjust_addr_(NULL) 317 { } 318 319 ~Relocate() 320 { 321 if (this->ignore_gd_add_) 322 { 323 // FIXME: This needs to specify the location somehow. 324 gold_error(_("missing expected TLS relocation")); 325 } 326 } 327 328 // Do a relocation. Return false if the caller should not issue 329 // any warnings about this relocation. 330 inline bool 331 relocate(const Relocate_info<size, big_endian>*, unsigned int, 332 Target_sparc*, Output_section*, size_t, const unsigned char*, 333 const Sized_symbol<size>*, const Symbol_value<size>*, 334 unsigned char*, typename elfcpp::Elf_types<size>::Elf_Addr, 335 section_size_type); 336 337 private: 338 // Do a TLS relocation. 339 inline void 340 relocate_tls(const Relocate_info<size, big_endian>*, Target_sparc* target, 341 size_t relnum, const elfcpp::Rela<size, big_endian>&, 342 unsigned int r_type, const Sized_symbol<size>*, 343 const Symbol_value<size>*, 344 unsigned char*, 345 typename elfcpp::Elf_types<size>::Elf_Addr, 346 section_size_type); 347 348 inline void 349 relax_call(Target_sparc<size, big_endian>* target, 350 unsigned char* view, 351 const elfcpp::Rela<size, big_endian>& rela, 352 section_size_type view_size); 353 354 // Ignore the next relocation which should be R_SPARC_TLS_GD_ADD 355 bool ignore_gd_add_; 356 357 // If we hit a reloc at this view address, adjust it back by 4 bytes. 358 unsigned char *reloc_adjust_addr_; 359 }; 360 361 // Get the GOT section, creating it if necessary. 362 Output_data_got<size, big_endian>* 363 got_section(Symbol_table*, Layout*); 364 365 // Create the PLT section. 366 void 367 make_plt_section(Symbol_table* symtab, Layout* layout); 368 369 // Create a PLT entry for a global symbol. 370 void 371 make_plt_entry(Symbol_table*, Layout*, Symbol*); 372 373 // Create a PLT entry for a local STT_GNU_IFUNC symbol. 374 void 375 make_local_ifunc_plt_entry(Symbol_table*, Layout*, 376 Sized_relobj_file<size, big_endian>* relobj, 377 unsigned int local_sym_index); 378 379 // Create a GOT entry for the TLS module index. 380 unsigned int 381 got_mod_index_entry(Symbol_table* symtab, Layout* layout, 382 Sized_relobj_file<size, big_endian>* object); 383 384 // Return the gsym for "__tls_get_addr". Cache if not already 385 // cached. 386 Symbol* 387 tls_get_addr_sym(Symbol_table* symtab) 388 { 389 if (!this->tls_get_addr_sym_) 390 this->tls_get_addr_sym_ = symtab->lookup("__tls_get_addr", NULL); 391 gold_assert(this->tls_get_addr_sym_); 392 return this->tls_get_addr_sym_; 393 } 394 395 // Get the PLT section. 396 Output_data_plt_sparc<size, big_endian>* 397 plt_section() const 398 { 399 gold_assert(this->plt_ != NULL); 400 return this->plt_; 401 } 402 403 // Get the dynamic reloc section, creating it if necessary. 404 Reloc_section* 405 rela_dyn_section(Layout*); 406 407 // Get the section to use for IFUNC relocations. 408 Reloc_section* 409 rela_ifunc_section(Layout*); 410 411 // Copy a relocation against a global symbol. 412 void 413 copy_reloc(Symbol_table* symtab, Layout* layout, 414 Sized_relobj_file<size, big_endian>* object, 415 unsigned int shndx, Output_section* output_section, 416 Symbol* sym, const elfcpp::Rela<size, big_endian>& reloc) 417 { 418 unsigned int r_type = elfcpp::elf_r_type<size>(reloc.get_r_info()); 419 this->copy_relocs_.copy_reloc(symtab, layout, 420 symtab->get_sized_symbol<size>(sym), 421 object, shndx, output_section, 422 r_type, reloc.get_r_offset(), 423 reloc.get_r_addend(), 424 this->rela_dyn_section(layout)); 425 } 426 427 // Information about this specific target which we pass to the 428 // general Target structure. 429 static Target::Target_info sparc_info; 430 431 // The types of GOT entries needed for this platform. 432 // These values are exposed to the ABI in an incremental link. 433 // Do not renumber existing values without changing the version 434 // number of the .gnu_incremental_inputs section. 435 enum Got_type 436 { 437 GOT_TYPE_STANDARD = 0, // GOT entry for a regular symbol 438 GOT_TYPE_TLS_OFFSET = 1, // GOT entry for TLS offset 439 GOT_TYPE_TLS_PAIR = 2, // GOT entry for TLS module/offset pair 440 }; 441 442 struct Register_symbol 443 { 444 Register_symbol() 445 : name(NULL), shndx(0), obj(NULL) 446 { } 447 const char* name; 448 unsigned int shndx; 449 Object* obj; 450 }; 451 452 // The GOT section. 453 Output_data_got<size, big_endian>* got_; 454 // The PLT section. 455 Output_data_plt_sparc<size, big_endian>* plt_; 456 // The dynamic reloc section. 457 Reloc_section* rela_dyn_; 458 // The section to use for IFUNC relocs. 459 Reloc_section* rela_ifunc_; 460 // Relocs saved to avoid a COPY reloc. 461 Copy_relocs<elfcpp::SHT_RELA, size, big_endian> copy_relocs_; 462 // Offset of the GOT entry for the TLS module index; 463 unsigned int got_mod_index_offset_; 464 // Cached pointer to __tls_get_addr symbol 465 Symbol* tls_get_addr_sym_; 466 // Accumulated elf machine type 467 elfcpp::Elf_Half elf_machine_; 468 // Accumulated elf header flags 469 elfcpp::Elf_Word elf_flags_; 470 // Whether elf_flags_ has been set for the first time yet 471 bool elf_flags_set_; 472 // STT_SPARC_REGISTER symbols (%g2, %g3, %g6, %g7). 473 Register_symbol register_syms_[4]; 474}; 475 476template<> 477Target::Target_info Target_sparc<32, true>::sparc_info = 478{ 479 32, // size 480 true, // is_big_endian 481 elfcpp::EM_SPARC, // machine_code 482 false, // has_make_symbol 483 false, // has_resolve 484 false, // has_code_fill 485 true, // is_default_stack_executable 486 false, // can_icf_inline_merge_sections 487 '\0', // wrap_char 488 "/usr/lib/ld.so.1", // dynamic_linker 489 0x00010000, // default_text_segment_address 490 64 * 1024, // abi_pagesize (overridable by -z max-page-size) 491 8 * 1024, // common_pagesize (overridable by -z common-page-size) 492 false, // isolate_execinstr 493 0, // rosegment_gap 494 elfcpp::SHN_UNDEF, // small_common_shndx 495 elfcpp::SHN_UNDEF, // large_common_shndx 496 0, // small_common_section_flags 497 0, // large_common_section_flags 498 NULL, // attributes_section 499 NULL, // attributes_vendor 500 "_start", // entry_symbol_name 501 32, // hash_entry_size 502 elfcpp::SHT_PROGBITS, // unwind_section_type 503}; 504 505template<> 506Target::Target_info Target_sparc<64, true>::sparc_info = 507{ 508 64, // size 509 true, // is_big_endian 510 elfcpp::EM_SPARCV9, // machine_code 511 true, // has_make_symbol 512 false, // has_resolve 513 false, // has_code_fill 514 true, // is_default_stack_executable 515 false, // can_icf_inline_merge_sections 516 '\0', // wrap_char 517 "/usr/lib/sparcv9/ld.so.1", // dynamic_linker 518 0x100000, // default_text_segment_address 519 64 * 1024, // abi_pagesize (overridable by -z max-page-size) 520 8 * 1024, // common_pagesize (overridable by -z common-page-size) 521 false, // isolate_execinstr 522 0, // rosegment_gap 523 elfcpp::SHN_UNDEF, // small_common_shndx 524 elfcpp::SHN_UNDEF, // large_common_shndx 525 0, // small_common_section_flags 526 0, // large_common_section_flags 527 NULL, // attributes_section 528 NULL, // attributes_vendor 529 "_start", // entry_symbol_name 530 32, // hash_entry_size 531 elfcpp::SHT_PROGBITS, // unwind_section_type 532}; 533 534// We have to take care here, even when operating in little-endian 535// mode, sparc instructions are still big endian. 536template<int size, bool big_endian> 537class Sparc_relocate_functions 538{ 539private: 540 // Do a simple relocation with the addend in the relocation. 541 template<int valsize> 542 static inline void 543 rela(unsigned char* view, 544 unsigned int right_shift, 545 typename elfcpp::Elf_types<valsize>::Elf_Addr dst_mask, 546 typename elfcpp::Swap<size, big_endian>::Valtype value, 547 typename elfcpp::Swap<size, big_endian>::Valtype addend) 548 { 549 typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; 550 Valtype* wv = reinterpret_cast<Valtype*>(view); 551 Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv); 552 Valtype reloc = ((value + addend) >> right_shift); 553 554 val &= ~dst_mask; 555 reloc &= dst_mask; 556 557 elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc); 558 } 559 560 // Do a simple relocation using a symbol value with the addend in 561 // the relocation. 562 template<int valsize> 563 static inline void 564 rela(unsigned char* view, 565 unsigned int right_shift, 566 typename elfcpp::Elf_types<valsize>::Elf_Addr dst_mask, 567 const Sized_relobj_file<size, big_endian>* object, 568 const Symbol_value<size>* psymval, 569 typename elfcpp::Swap<valsize, big_endian>::Valtype addend) 570 { 571 typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; 572 Valtype* wv = reinterpret_cast<Valtype*>(view); 573 Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv); 574 Valtype reloc = (psymval->value(object, addend) >> right_shift); 575 576 val &= ~dst_mask; 577 reloc &= dst_mask; 578 579 elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc); 580 } 581 582 // Do a simple relocation using a symbol value with the addend in 583 // the relocation, unaligned. 584 template<int valsize> 585 static inline void 586 rela_ua(unsigned char* view, 587 unsigned int right_shift, elfcpp::Elf_Xword dst_mask, 588 const Sized_relobj_file<size, big_endian>* object, 589 const Symbol_value<size>* psymval, 590 typename elfcpp::Swap<size, big_endian>::Valtype addend) 591 { 592 typedef typename elfcpp::Swap_unaligned<valsize, 593 big_endian>::Valtype Valtype; 594 unsigned char* wv = view; 595 Valtype val = elfcpp::Swap_unaligned<valsize, big_endian>::readval(wv); 596 Valtype reloc = (psymval->value(object, addend) >> right_shift); 597 598 val &= ~dst_mask; 599 reloc &= dst_mask; 600 601 elfcpp::Swap_unaligned<valsize, big_endian>::writeval(wv, val | reloc); 602 } 603 604 // Do a simple PC relative relocation with a Symbol_value with the 605 // addend in the relocation. 606 template<int valsize> 607 static inline void 608 pcrela(unsigned char* view, 609 unsigned int right_shift, 610 typename elfcpp::Elf_types<valsize>::Elf_Addr dst_mask, 611 const Sized_relobj_file<size, big_endian>* object, 612 const Symbol_value<size>* psymval, 613 typename elfcpp::Swap<size, big_endian>::Valtype addend, 614 typename elfcpp::Elf_types<size>::Elf_Addr address) 615 { 616 typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; 617 Valtype* wv = reinterpret_cast<Valtype*>(view); 618 Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv); 619 Valtype reloc = ((psymval->value(object, addend) - address) 620 >> right_shift); 621 622 val &= ~dst_mask; 623 reloc &= dst_mask; 624 625 elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc); 626 } 627 628 template<int valsize> 629 static inline void 630 pcrela_unaligned(unsigned char* view, 631 const Sized_relobj_file<size, big_endian>* object, 632 const Symbol_value<size>* psymval, 633 typename elfcpp::Swap<size, big_endian>::Valtype addend, 634 typename elfcpp::Elf_types<size>::Elf_Addr address) 635 { 636 typedef typename elfcpp::Swap_unaligned<valsize, 637 big_endian>::Valtype Valtype; 638 unsigned char* wv = view; 639 Valtype reloc = (psymval->value(object, addend) - address); 640 641 elfcpp::Swap_unaligned<valsize, big_endian>::writeval(wv, reloc); 642 } 643 644 typedef Sparc_relocate_functions<size, big_endian> This; 645 typedef Sparc_relocate_functions<size, true> This_insn; 646 647public: 648 // R_SPARC_WDISP30: (Symbol + Addend - Address) >> 2 649 static inline void 650 wdisp30(unsigned char* view, 651 const Sized_relobj_file<size, big_endian>* object, 652 const Symbol_value<size>* psymval, 653 typename elfcpp::Elf_types<size>::Elf_Addr addend, 654 typename elfcpp::Elf_types<size>::Elf_Addr address) 655 { 656 This_insn::template pcrela<32>(view, 2, 0x3fffffff, object, 657 psymval, addend, address); 658 } 659 660 // R_SPARC_WDISP22: (Symbol + Addend - Address) >> 2 661 static inline void 662 wdisp22(unsigned char* view, 663 const Sized_relobj_file<size, big_endian>* object, 664 const Symbol_value<size>* psymval, 665 typename elfcpp::Elf_types<size>::Elf_Addr addend, 666 typename elfcpp::Elf_types<size>::Elf_Addr address) 667 { 668 This_insn::template pcrela<32>(view, 2, 0x003fffff, object, 669 psymval, addend, address); 670 } 671 672 // R_SPARC_WDISP19: (Symbol + Addend - Address) >> 2 673 static inline void 674 wdisp19(unsigned char* view, 675 const Sized_relobj_file<size, big_endian>* object, 676 const Symbol_value<size>* psymval, 677 typename elfcpp::Elf_types<size>::Elf_Addr addend, 678 typename elfcpp::Elf_types<size>::Elf_Addr address) 679 { 680 This_insn::template pcrela<32>(view, 2, 0x0007ffff, object, 681 psymval, addend, address); 682 } 683 684 // R_SPARC_WDISP16: (Symbol + Addend - Address) >> 2 685 static inline void 686 wdisp16(unsigned char* view, 687 const Sized_relobj_file<size, big_endian>* object, 688 const Symbol_value<size>* psymval, 689 typename elfcpp::Elf_types<size>::Elf_Addr addend, 690 typename elfcpp::Elf_types<size>::Elf_Addr address) 691 { 692 typedef typename elfcpp::Swap<32, true>::Valtype Valtype; 693 Valtype* wv = reinterpret_cast<Valtype*>(view); 694 Valtype val = elfcpp::Swap<32, true>::readval(wv); 695 Valtype reloc = ((psymval->value(object, addend) - address) 696 >> 2); 697 698 // The relocation value is split between the low 14 bits, 699 // and bits 20-21. 700 val &= ~((0x3 << 20) | 0x3fff); 701 reloc = (((reloc & 0xc000) << (20 - 14)) 702 | (reloc & 0x3ffff)); 703 704 elfcpp::Swap<32, true>::writeval(wv, val | reloc); 705 } 706 707 // R_SPARC_WDISP10: (Symbol + Addend - Address) >> 2 708 static inline void 709 wdisp10(unsigned char* view, 710 const Sized_relobj_file<size, big_endian>* object, 711 const Symbol_value<size>* psymval, 712 typename elfcpp::Elf_types<size>::Elf_Addr addend, 713 typename elfcpp::Elf_types<size>::Elf_Addr address) 714 { 715 typedef typename elfcpp::Swap<32, true>::Valtype Valtype; 716 Valtype* wv = reinterpret_cast<Valtype*>(view); 717 Valtype val = elfcpp::Swap<32, true>::readval(wv); 718 Valtype reloc = ((psymval->value(object, addend) - address) 719 >> 2); 720 721 // The relocation value is split between the low bits 5-12, 722 // and high bits 19-20. 723 val &= ~((0x3 << 19) | (0xff << 5)); 724 reloc = (((reloc & 0x300) << (19 - 8)) 725 | ((reloc & 0xff) << (5 - 0))); 726 727 elfcpp::Swap<32, true>::writeval(wv, val | reloc); 728 } 729 730 // R_SPARC_PC22: (Symbol + Addend - Address) >> 10 731 static inline void 732 pc22(unsigned char* view, 733 const Sized_relobj_file<size, big_endian>* object, 734 const Symbol_value<size>* psymval, 735 typename elfcpp::Elf_types<size>::Elf_Addr addend, 736 typename elfcpp::Elf_types<size>::Elf_Addr address) 737 { 738 This_insn::template pcrela<32>(view, 10, 0x003fffff, object, 739 psymval, addend, address); 740 } 741 742 // R_SPARC_PC10: (Symbol + Addend - Address) & 0x3ff 743 static inline void 744 pc10(unsigned char* view, 745 const Sized_relobj_file<size, big_endian>* object, 746 const Symbol_value<size>* psymval, 747 typename elfcpp::Elf_types<size>::Elf_Addr addend, 748 typename elfcpp::Elf_types<size>::Elf_Addr address) 749 { 750 This_insn::template pcrela<32>(view, 0, 0x000003ff, object, 751 psymval, addend, address); 752 } 753 754 // R_SPARC_HI22: (Symbol + Addend) >> 10 755 static inline void 756 hi22(unsigned char* view, 757 typename elfcpp::Elf_types<size>::Elf_Addr value, 758 typename elfcpp::Elf_types<size>::Elf_Addr addend) 759 { 760 This_insn::template rela<32>(view, 10, 0x003fffff, value, addend); 761 } 762 763 // R_SPARC_HI22: (Symbol + Addend) >> 10 764 static inline void 765 hi22(unsigned char* view, 766 const Sized_relobj_file<size, big_endian>* object, 767 const Symbol_value<size>* psymval, 768 typename elfcpp::Elf_types<size>::Elf_Addr addend) 769 { 770 This_insn::template rela<32>(view, 10, 0x003fffff, object, psymval, addend); 771 } 772 773 // R_SPARC_PCPLT22: (Symbol + Addend - Address) >> 10 774 static inline void 775 pcplt22(unsigned char* view, 776 const Sized_relobj_file<size, big_endian>* object, 777 const Symbol_value<size>* psymval, 778 typename elfcpp::Elf_types<size>::Elf_Addr addend, 779 typename elfcpp::Elf_types<size>::Elf_Addr address) 780 { 781 This_insn::template pcrela<32>(view, 10, 0x003fffff, object, 782 psymval, addend, address); 783 } 784 785 // R_SPARC_LO10: (Symbol + Addend) & 0x3ff 786 static inline void 787 lo10(unsigned char* view, 788 typename elfcpp::Elf_types<size>::Elf_Addr value, 789 typename elfcpp::Elf_types<size>::Elf_Addr addend) 790 { 791 This_insn::template rela<32>(view, 0, 0x000003ff, value, addend); 792 } 793 794 // R_SPARC_LO10: (Symbol + Addend) & 0x3ff 795 static inline void 796 lo10(unsigned char* view, 797 const Sized_relobj_file<size, big_endian>* object, 798 const Symbol_value<size>* psymval, 799 typename elfcpp::Elf_types<size>::Elf_Addr addend) 800 { 801 This_insn::template rela<32>(view, 0, 0x000003ff, object, psymval, addend); 802 } 803 804 // R_SPARC_LO10: (Symbol + Addend) & 0x3ff 805 static inline void 806 lo10(unsigned char* view, 807 const Sized_relobj_file<size, big_endian>* object, 808 const Symbol_value<size>* psymval, 809 typename elfcpp::Elf_types<size>::Elf_Addr addend, 810 typename elfcpp::Elf_types<size>::Elf_Addr address) 811 { 812 This_insn::template pcrela<32>(view, 0, 0x000003ff, object, 813 psymval, addend, address); 814 } 815 816 // R_SPARC_OLO10: ((Symbol + Addend) & 0x3ff) + Addend2 817 static inline void 818 olo10(unsigned char* view, 819 const Sized_relobj_file<size, big_endian>* object, 820 const Symbol_value<size>* psymval, 821 typename elfcpp::Elf_types<size>::Elf_Addr addend, 822 typename elfcpp::Elf_types<size>::Elf_Addr addend2) 823 { 824 typedef typename elfcpp::Swap<32, true>::Valtype Valtype; 825 Valtype* wv = reinterpret_cast<Valtype*>(view); 826 Valtype val = elfcpp::Swap<32, true>::readval(wv); 827 Valtype reloc = psymval->value(object, addend); 828 829 val &= ~0x1fff; 830 reloc &= 0x3ff; 831 reloc += addend2; 832 reloc &= 0x1fff; 833 834 elfcpp::Swap<32, true>::writeval(wv, val | reloc); 835 } 836 837 // R_SPARC_22: (Symbol + Addend) 838 static inline void 839 rela32_22(unsigned char* view, 840 const Sized_relobj_file<size, big_endian>* object, 841 const Symbol_value<size>* psymval, 842 typename elfcpp::Elf_types<size>::Elf_Addr addend) 843 { 844 This_insn::template rela<32>(view, 0, 0x003fffff, object, psymval, addend); 845 } 846 847 // R_SPARC_13: (Symbol + Addend) 848 static inline void 849 rela32_13(unsigned char* view, 850 typename elfcpp::Elf_types<size>::Elf_Addr value, 851 typename elfcpp::Elf_types<size>::Elf_Addr addend) 852 { 853 This_insn::template rela<32>(view, 0, 0x00001fff, value, addend); 854 } 855 856 // R_SPARC_13: (Symbol + Addend) 857 static inline void 858 rela32_13(unsigned char* view, 859 const Sized_relobj_file<size, big_endian>* object, 860 const Symbol_value<size>* psymval, 861 typename elfcpp::Elf_types<size>::Elf_Addr addend) 862 { 863 This_insn::template rela<32>(view, 0, 0x00001fff, object, psymval, addend); 864 } 865 866 // R_SPARC_UA16: (Symbol + Addend) 867 static inline void 868 ua16(unsigned char* view, 869 const Sized_relobj_file<size, big_endian>* object, 870 const Symbol_value<size>* psymval, 871 typename elfcpp::Elf_types<size>::Elf_Addr addend) 872 { 873 This::template rela_ua<16>(view, 0, 0xffff, object, psymval, addend); 874 } 875 876 // R_SPARC_UA32: (Symbol + Addend) 877 static inline void 878 ua32(unsigned char* view, 879 const Sized_relobj_file<size, big_endian>* object, 880 const Symbol_value<size>* psymval, 881 typename elfcpp::Elf_types<size>::Elf_Addr addend) 882 { 883 This::template rela_ua<32>(view, 0, 0xffffffff, object, psymval, addend); 884 } 885 886 // R_SPARC_UA64: (Symbol + Addend) 887 static inline void 888 ua64(unsigned char* view, 889 const Sized_relobj_file<size, big_endian>* object, 890 const Symbol_value<size>* psymval, 891 typename elfcpp::Elf_types<size>::Elf_Addr addend) 892 { 893 This::template rela_ua<64>(view, 0, ~(elfcpp::Elf_Xword) 0, 894 object, psymval, addend); 895 } 896 897 // R_SPARC_DISP8: (Symbol + Addend - Address) 898 static inline void 899 disp8(unsigned char* view, 900 const Sized_relobj_file<size, big_endian>* object, 901 const Symbol_value<size>* psymval, 902 typename elfcpp::Elf_types<size>::Elf_Addr addend, 903 typename elfcpp::Elf_types<size>::Elf_Addr address) 904 { 905 This::template pcrela_unaligned<8>(view, object, psymval, 906 addend, address); 907 } 908 909 // R_SPARC_DISP16: (Symbol + Addend - Address) 910 static inline void 911 disp16(unsigned char* view, 912 const Sized_relobj_file<size, big_endian>* object, 913 const Symbol_value<size>* psymval, 914 typename elfcpp::Elf_types<size>::Elf_Addr addend, 915 typename elfcpp::Elf_types<size>::Elf_Addr address) 916 { 917 This::template pcrela_unaligned<16>(view, object, psymval, 918 addend, address); 919 } 920 921 // R_SPARC_DISP32: (Symbol + Addend - Address) 922 static inline void 923 disp32(unsigned char* view, 924 const Sized_relobj_file<size, big_endian>* object, 925 const Symbol_value<size>* psymval, 926 typename elfcpp::Elf_types<size>::Elf_Addr addend, 927 typename elfcpp::Elf_types<size>::Elf_Addr address) 928 { 929 This::template pcrela_unaligned<32>(view, object, psymval, 930 addend, address); 931 } 932 933 // R_SPARC_DISP64: (Symbol + Addend - Address) 934 static inline void 935 disp64(unsigned char* view, 936 const Sized_relobj_file<size, big_endian>* object, 937 const Symbol_value<size>* psymval, 938 elfcpp::Elf_Xword addend, 939 typename elfcpp::Elf_types<size>::Elf_Addr address) 940 { 941 This::template pcrela_unaligned<64>(view, object, psymval, 942 addend, address); 943 } 944 945 // R_SPARC_H34: (Symbol + Addend) >> 12 946 static inline void 947 h34(unsigned char* view, 948 const Sized_relobj_file<size, big_endian>* object, 949 const Symbol_value<size>* psymval, 950 typename elfcpp::Elf_types<size>::Elf_Addr addend) 951 { 952 This_insn::template rela<32>(view, 12, 0x003fffff, object, psymval, addend); 953 } 954 955 // R_SPARC_H44: (Symbol + Addend) >> 22 956 static inline void 957 h44(unsigned char* view, 958 const Sized_relobj_file<size, big_endian>* object, 959 const Symbol_value<size>* psymval, 960 typename elfcpp::Elf_types<size>::Elf_Addr addend) 961 { 962 This_insn::template rela<32>(view, 22, 0x003fffff, object, psymval, addend); 963 } 964 965 // R_SPARC_M44: ((Symbol + Addend) >> 12) & 0x3ff 966 static inline void 967 m44(unsigned char* view, 968 const Sized_relobj_file<size, big_endian>* object, 969 const Symbol_value<size>* psymval, 970 typename elfcpp::Elf_types<size>::Elf_Addr addend) 971 { 972 This_insn::template rela<32>(view, 12, 0x000003ff, object, psymval, addend); 973 } 974 975 // R_SPARC_L44: (Symbol + Addend) & 0xfff 976 static inline void 977 l44(unsigned char* view, 978 const Sized_relobj_file<size, big_endian>* object, 979 const Symbol_value<size>* psymval, 980 typename elfcpp::Elf_types<size>::Elf_Addr addend) 981 { 982 This_insn::template rela<32>(view, 0, 0x00000fff, object, psymval, addend); 983 } 984 985 // R_SPARC_HH22: (Symbol + Addend) >> 42 986 static inline void 987 hh22(unsigned char* view, 988 const Sized_relobj_file<size, big_endian>* object, 989 const Symbol_value<size>* psymval, 990 typename elfcpp::Elf_types<size>::Elf_Addr addend) 991 { 992 This_insn::template rela<32>(view, 42, 0x003fffff, object, psymval, addend); 993 } 994 995 // R_SPARC_PC_HH22: (Symbol + Addend - Address) >> 42 996 static inline void 997 pc_hh22(unsigned char* view, 998 const Sized_relobj_file<size, big_endian>* object, 999 const Symbol_value<size>* psymval, 1000 typename elfcpp::Elf_types<size>::Elf_Addr addend, 1001 typename elfcpp::Elf_types<size>::Elf_Addr address) 1002 { 1003 This_insn::template pcrela<32>(view, 42, 0x003fffff, object, 1004 psymval, addend, address); 1005 } 1006 1007 // R_SPARC_HM10: ((Symbol + Addend) >> 32) & 0x3ff 1008 static inline void 1009 hm10(unsigned char* view, 1010 const Sized_relobj_file<size, big_endian>* object, 1011 const Symbol_value<size>* psymval, 1012 typename elfcpp::Elf_types<size>::Elf_Addr addend) 1013 { 1014 This_insn::template rela<32>(view, 32, 0x000003ff, object, psymval, addend); 1015 } 1016 1017 // R_SPARC_PC_HM10: ((Symbol + Addend - Address) >> 32) & 0x3ff 1018 static inline void 1019 pc_hm10(unsigned char* view, 1020 const Sized_relobj_file<size, big_endian>* object, 1021 const Symbol_value<size>* psymval, 1022 typename elfcpp::Elf_types<size>::Elf_Addr addend, 1023 typename elfcpp::Elf_types<size>::Elf_Addr address) 1024 { 1025 This_insn::template pcrela<32>(view, 32, 0x000003ff, object, 1026 psymval, addend, address); 1027 } 1028 1029 // R_SPARC_11: (Symbol + Addend) 1030 static inline void 1031 rela32_11(unsigned char* view, 1032 const Sized_relobj_file<size, big_endian>* object, 1033 const Symbol_value<size>* psymval, 1034 typename elfcpp::Elf_types<size>::Elf_Addr addend) 1035 { 1036 This_insn::template rela<32>(view, 0, 0x000007ff, object, psymval, addend); 1037 } 1038 1039 // R_SPARC_10: (Symbol + Addend) 1040 static inline void 1041 rela32_10(unsigned char* view, 1042 const Sized_relobj_file<size, big_endian>* object, 1043 const Symbol_value<size>* psymval, 1044 typename elfcpp::Elf_types<size>::Elf_Addr addend) 1045 { 1046 This_insn::template rela<32>(view, 0, 0x000003ff, object, psymval, addend); 1047 } 1048 1049 // R_SPARC_7: (Symbol + Addend) 1050 static inline void 1051 rela32_7(unsigned char* view, 1052 const Sized_relobj_file<size, big_endian>* object, 1053 const Symbol_value<size>* psymval, 1054 typename elfcpp::Elf_types<size>::Elf_Addr addend) 1055 { 1056 This_insn::template rela<32>(view, 0, 0x0000007f, object, psymval, addend); 1057 } 1058 1059 // R_SPARC_6: (Symbol + Addend) 1060 static inline void 1061 rela32_6(unsigned char* view, 1062 const Sized_relobj_file<size, big_endian>* object, 1063 const Symbol_value<size>* psymval, 1064 typename elfcpp::Elf_types<size>::Elf_Addr addend) 1065 { 1066 This_insn::template rela<32>(view, 0, 0x0000003f, object, psymval, addend); 1067 } 1068 1069 // R_SPARC_5: (Symbol + Addend) 1070 static inline void 1071 rela32_5(unsigned char* view, 1072 const Sized_relobj_file<size, big_endian>* object, 1073 const Symbol_value<size>* psymval, 1074 typename elfcpp::Elf_types<size>::Elf_Addr addend) 1075 { 1076 This_insn::template rela<32>(view, 0, 0x0000001f, object, psymval, addend); 1077 } 1078 1079 // R_SPARC_TLS_LDO_HIX22: @dtpoff(Symbol + Addend) >> 10 1080 static inline void 1081 ldo_hix22(unsigned char* view, 1082 typename elfcpp::Elf_types<size>::Elf_Addr value, 1083 typename elfcpp::Elf_types<size>::Elf_Addr addend) 1084 { 1085 This_insn::hi22(view, value, addend); 1086 } 1087 1088 // R_SPARC_TLS_LDO_LOX10: @dtpoff(Symbol + Addend) & 0x3ff 1089 static inline void 1090 ldo_lox10(unsigned char* view, 1091 typename elfcpp::Elf_types<size>::Elf_Addr value, 1092 typename elfcpp::Elf_types<size>::Elf_Addr addend) 1093 { 1094 typedef typename elfcpp::Swap<32, true>::Valtype Valtype; 1095 Valtype* wv = reinterpret_cast<Valtype*>(view); 1096 Valtype val = elfcpp::Swap<32, true>::readval(wv); 1097 Valtype reloc = (value + addend); 1098 1099 val &= ~0x1fff; 1100 reloc &= 0x3ff; 1101 1102 elfcpp::Swap<32, true>::writeval(wv, val | reloc); 1103 } 1104 1105 // R_SPARC_TLS_LE_HIX22: (@tpoff(Symbol + Addend) ^ 0xffffffffffffffff) >> 10 1106 static inline void 1107 hix22(unsigned char* view, 1108 typename elfcpp::Elf_types<size>::Elf_Addr value, 1109 typename elfcpp::Elf_types<size>::Elf_Addr addend) 1110 { 1111 typedef typename elfcpp::Swap<32, true>::Valtype Valtype; 1112 Valtype* wv = reinterpret_cast<Valtype*>(view); 1113 Valtype val = elfcpp::Swap<32, true>::readval(wv); 1114 Valtype reloc = (value + addend); 1115 1116 val &= ~0x3fffff; 1117 1118 reloc ^= ~(Valtype)0; 1119 reloc >>= 10; 1120 1121 reloc &= 0x3fffff; 1122 1123 elfcpp::Swap<32, true>::writeval(wv, val | reloc); 1124 } 1125 1126 // R_SPARC_GOTDATA_OP_HIX22: @gdopoff(Symbol + Addend) >> 10 1127 static inline void 1128 gdop_hix22(unsigned char* view, 1129 typename elfcpp::Elf_types<size>::Elf_Addr value) 1130 { 1131 typedef typename elfcpp::Swap<32, true>::Valtype Valtype; 1132 Valtype* wv = reinterpret_cast<Valtype*>(view); 1133 Valtype val = elfcpp::Swap<32, true>::readval(wv); 1134 int32_t reloc = static_cast<int32_t>(value); 1135 1136 val &= ~0x3fffff; 1137 1138 if (reloc < 0) 1139 reloc ^= ~static_cast<int32_t>(0); 1140 reloc >>= 10; 1141 1142 reloc &= 0x3fffff; 1143 1144 elfcpp::Swap<32, true>::writeval(wv, val | reloc); 1145 } 1146 1147 // R_SPARC_HIX22: ((Symbol + Addend) ^ 0xffffffffffffffff) >> 10 1148 static inline void 1149 hix22(unsigned char* view, 1150 const Sized_relobj_file<size, big_endian>* object, 1151 const Symbol_value<size>* psymval, 1152 typename elfcpp::Elf_types<size>::Elf_Addr addend) 1153 { 1154 typedef typename elfcpp::Swap<32, true>::Valtype Valtype; 1155 Valtype* wv = reinterpret_cast<Valtype*>(view); 1156 Valtype val = elfcpp::Swap<32, true>::readval(wv); 1157 Valtype reloc = psymval->value(object, addend); 1158 1159 val &= ~0x3fffff; 1160 1161 reloc ^= ~(Valtype)0; 1162 reloc >>= 10; 1163 1164 reloc &= 0x3fffff; 1165 1166 elfcpp::Swap<32, true>::writeval(wv, val | reloc); 1167 } 1168 1169 1170 // R_SPARC_TLS_LE_LOX10: (@tpoff(Symbol + Addend) & 0x3ff) | 0x1c00 1171 static inline void 1172 lox10(unsigned char* view, 1173 typename elfcpp::Elf_types<size>::Elf_Addr value, 1174 typename elfcpp::Elf_types<size>::Elf_Addr addend) 1175 { 1176 typedef typename elfcpp::Swap<32, true>::Valtype Valtype; 1177 Valtype* wv = reinterpret_cast<Valtype*>(view); 1178 Valtype val = elfcpp::Swap<32, true>::readval(wv); 1179 Valtype reloc = (value + addend); 1180 1181 val &= ~0x1fff; 1182 reloc &= 0x3ff; 1183 reloc |= 0x1c00; 1184 1185 elfcpp::Swap<32, true>::writeval(wv, val | reloc); 1186 } 1187 1188 // R_SPARC_GOTDATA_OP_LOX10: (@gdopoff(Symbol + Addend) & 0x3ff) | 0x1c00 1189 static inline void 1190 gdop_lox10(unsigned char* view, 1191 typename elfcpp::Elf_types<size>::Elf_Addr value) 1192 { 1193 typedef typename elfcpp::Swap<32, true>::Valtype Valtype; 1194 Valtype* wv = reinterpret_cast<Valtype*>(view); 1195 Valtype val = elfcpp::Swap<32, true>::readval(wv); 1196 int32_t reloc = static_cast<int32_t>(value); 1197 1198 if (reloc < 0) 1199 reloc = (reloc & 0x3ff) | 0x1c00; 1200 else 1201 reloc = (reloc & 0x3ff); 1202 1203 val &= ~0x1fff; 1204 elfcpp::Swap<32, true>::writeval(wv, val | reloc); 1205 } 1206 1207 // R_SPARC_LOX10: ((Symbol + Addend) & 0x3ff) | 0x1c00 1208 static inline void 1209 lox10(unsigned char* view, 1210 const Sized_relobj_file<size, big_endian>* object, 1211 const Symbol_value<size>* psymval, 1212 typename elfcpp::Elf_types<size>::Elf_Addr addend) 1213 { 1214 typedef typename elfcpp::Swap<32, true>::Valtype Valtype; 1215 Valtype* wv = reinterpret_cast<Valtype*>(view); 1216 Valtype val = elfcpp::Swap<32, true>::readval(wv); 1217 Valtype reloc = psymval->value(object, addend); 1218 1219 val &= ~0x1fff; 1220 reloc &= 0x3ff; 1221 reloc |= 0x1c00; 1222 1223 elfcpp::Swap<32, true>::writeval(wv, val | reloc); 1224 } 1225}; 1226 1227// Get the GOT section, creating it if necessary. 1228 1229template<int size, bool big_endian> 1230Output_data_got<size, big_endian>* 1231Target_sparc<size, big_endian>::got_section(Symbol_table* symtab, 1232 Layout* layout) 1233{ 1234 if (this->got_ == NULL) 1235 { 1236 gold_assert(symtab != NULL && layout != NULL); 1237 1238 this->got_ = new Output_data_got<size, big_endian>(); 1239 1240 layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS, 1241 (elfcpp::SHF_ALLOC 1242 | elfcpp::SHF_WRITE), 1243 this->got_, ORDER_RELRO, true); 1244 1245 // Define _GLOBAL_OFFSET_TABLE_ at the start of the .got section. 1246 symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, 1247 Symbol_table::PREDEFINED, 1248 this->got_, 1249 0, 0, elfcpp::STT_OBJECT, 1250 elfcpp::STB_LOCAL, 1251 elfcpp::STV_HIDDEN, 0, 1252 false, false); 1253 } 1254 1255 return this->got_; 1256} 1257 1258// Get the dynamic reloc section, creating it if necessary. 1259 1260template<int size, bool big_endian> 1261typename Target_sparc<size, big_endian>::Reloc_section* 1262Target_sparc<size, big_endian>::rela_dyn_section(Layout* layout) 1263{ 1264 if (this->rela_dyn_ == NULL) 1265 { 1266 gold_assert(layout != NULL); 1267 this->rela_dyn_ = new Reloc_section(parameters->options().combreloc()); 1268 layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA, 1269 elfcpp::SHF_ALLOC, this->rela_dyn_, 1270 ORDER_DYNAMIC_RELOCS, false); 1271 } 1272 return this->rela_dyn_; 1273} 1274 1275// Get the section to use for IFUNC relocs, creating it if 1276// necessary. These go in .rela.dyn, but only after all other dynamic 1277// relocations. They need to follow the other dynamic relocations so 1278// that they can refer to global variables initialized by those 1279// relocs. 1280 1281template<int size, bool big_endian> 1282typename Target_sparc<size, big_endian>::Reloc_section* 1283Target_sparc<size, big_endian>::rela_ifunc_section(Layout* layout) 1284{ 1285 if (this->rela_ifunc_ == NULL) 1286 { 1287 // Make sure we have already created the dynamic reloc section. 1288 this->rela_dyn_section(layout); 1289 this->rela_ifunc_ = new Reloc_section(false); 1290 layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA, 1291 elfcpp::SHF_ALLOC, this->rela_ifunc_, 1292 ORDER_DYNAMIC_RELOCS, false); 1293 gold_assert(this->rela_dyn_->output_section() 1294 == this->rela_ifunc_->output_section()); 1295 } 1296 return this->rela_ifunc_; 1297} 1298 1299// A class to handle the PLT data. 1300 1301template<int size, bool big_endian> 1302class Output_data_plt_sparc : public Output_section_data 1303{ 1304 public: 1305 typedef Output_data_reloc<elfcpp::SHT_RELA, true, 1306 size, big_endian> Reloc_section; 1307 1308 Output_data_plt_sparc(Layout*); 1309 1310 // Add an entry to the PLT. 1311 void add_entry(Symbol_table* symtab, Layout* layout, Symbol* gsym); 1312 1313 // Add an entry to the PLT for a local STT_GNU_IFUNC symbol. 1314 unsigned int 1315 add_local_ifunc_entry(Symbol_table*, Layout*, 1316 Sized_relobj_file<size, big_endian>* relobj, 1317 unsigned int local_sym_index); 1318 1319 // Return the .rela.plt section data. 1320 const Reloc_section* rel_plt() const 1321 { 1322 return this->rel_; 1323 } 1324 1325 // Return where the IFUNC relocations should go. 1326 Reloc_section* 1327 rela_ifunc(Symbol_table*, Layout*); 1328 1329 void 1330 emit_pending_ifunc_relocs(); 1331 1332 // Return whether we created a section for IFUNC relocations. 1333 bool 1334 has_ifunc_section() const 1335 { return this->ifunc_rel_ != NULL; } 1336 1337 // Return the number of PLT entries. 1338 unsigned int 1339 entry_count() const 1340 { return this->count_ + this->ifunc_count_; } 1341 1342 // Return the offset of the first non-reserved PLT entry. 1343 static unsigned int 1344 first_plt_entry_offset() 1345 { return 4 * base_plt_entry_size; } 1346 1347 // Return the size of a PLT entry. 1348 static unsigned int 1349 get_plt_entry_size() 1350 { return base_plt_entry_size; } 1351 1352 // Return the PLT address to use for a global symbol. 1353 uint64_t 1354 address_for_global(const Symbol*); 1355 1356 // Return the PLT address to use for a local symbol. 1357 uint64_t 1358 address_for_local(const Relobj*, unsigned int symndx); 1359 1360 protected: 1361 void do_adjust_output_section(Output_section* os); 1362 1363 // Write to a map file. 1364 void 1365 do_print_to_mapfile(Mapfile* mapfile) const 1366 { mapfile->print_output_data(this, _("** PLT")); } 1367 1368 private: 1369 // The size of an entry in the PLT. 1370 static const int base_plt_entry_size = (size == 32 ? 12 : 32); 1371 1372 static const unsigned int plt_entries_per_block = 160; 1373 static const unsigned int plt_insn_chunk_size = 24; 1374 static const unsigned int plt_pointer_chunk_size = 8; 1375 static const unsigned int plt_block_size = 1376 (plt_entries_per_block 1377 * (plt_insn_chunk_size + plt_pointer_chunk_size)); 1378 1379 section_offset_type 1380 plt_index_to_offset(unsigned int index) 1381 { 1382 section_offset_type offset; 1383 1384 if (size == 32 || index < 32768) 1385 offset = index * base_plt_entry_size; 1386 else 1387 { 1388 unsigned int ext_index = index - 32768; 1389 1390 offset = (32768 * base_plt_entry_size) 1391 + ((ext_index / plt_entries_per_block) 1392 * plt_block_size) 1393 + ((ext_index % plt_entries_per_block) 1394 * plt_insn_chunk_size); 1395 } 1396 return offset; 1397 } 1398 1399 // Set the final size. 1400 void 1401 set_final_data_size() 1402 { 1403 unsigned int full_count = this->entry_count() + 4; 1404 unsigned int extra = (size == 32 ? 4 : 0); 1405 section_offset_type sz = plt_index_to_offset(full_count) + extra; 1406 1407 return this->set_data_size(sz); 1408 } 1409 1410 // Write out the PLT data. 1411 void 1412 do_write(Output_file*); 1413 1414 struct Global_ifunc 1415 { 1416 Reloc_section* rel; 1417 Symbol* gsym; 1418 unsigned int plt_index; 1419 }; 1420 1421 struct Local_ifunc 1422 { 1423 Reloc_section* rel; 1424 Sized_relobj_file<size, big_endian>* object; 1425 unsigned int local_sym_index; 1426 unsigned int plt_index; 1427 }; 1428 1429 // The reloc section. 1430 Reloc_section* rel_; 1431 // The IFUNC relocations, if necessary. These must follow the 1432 // regular relocations. 1433 Reloc_section* ifunc_rel_; 1434 // The number of PLT entries. 1435 unsigned int count_; 1436 // The number of PLT entries for IFUNC symbols. 1437 unsigned int ifunc_count_; 1438 // Global STT_GNU_IFUNC symbols. 1439 std::vector<Global_ifunc> global_ifuncs_; 1440 // Local STT_GNU_IFUNC symbols. 1441 std::vector<Local_ifunc> local_ifuncs_; 1442}; 1443 1444// Define the constants as required by C++ standard. 1445 1446template<int size, bool big_endian> 1447const int Output_data_plt_sparc<size, big_endian>::base_plt_entry_size; 1448 1449template<int size, bool big_endian> 1450const unsigned int 1451Output_data_plt_sparc<size, big_endian>::plt_entries_per_block; 1452 1453template<int size, bool big_endian> 1454const unsigned int Output_data_plt_sparc<size, big_endian>::plt_insn_chunk_size; 1455 1456template<int size, bool big_endian> 1457const unsigned int 1458Output_data_plt_sparc<size, big_endian>::plt_pointer_chunk_size; 1459 1460template<int size, bool big_endian> 1461const unsigned int Output_data_plt_sparc<size, big_endian>::plt_block_size; 1462 1463// Create the PLT section. The ordinary .got section is an argument, 1464// since we need to refer to the start. 1465 1466template<int size, bool big_endian> 1467Output_data_plt_sparc<size, big_endian>::Output_data_plt_sparc(Layout* layout) 1468 : Output_section_data(size == 32 ? 4 : 8), ifunc_rel_(NULL), 1469 count_(0), ifunc_count_(0), global_ifuncs_(), local_ifuncs_() 1470{ 1471 this->rel_ = new Reloc_section(false); 1472 layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA, 1473 elfcpp::SHF_ALLOC, this->rel_, 1474 ORDER_DYNAMIC_PLT_RELOCS, false); 1475} 1476 1477template<int size, bool big_endian> 1478void 1479Output_data_plt_sparc<size, big_endian>::do_adjust_output_section(Output_section* os) 1480{ 1481 os->set_entsize(0); 1482} 1483 1484// Add an entry to the PLT. 1485 1486template<int size, bool big_endian> 1487void 1488Output_data_plt_sparc<size, big_endian>::add_entry(Symbol_table* symtab, 1489 Layout* layout, 1490 Symbol* gsym) 1491{ 1492 gold_assert(!gsym->has_plt_offset()); 1493 1494 section_offset_type plt_offset; 1495 unsigned int index; 1496 1497 if (gsym->type() == elfcpp::STT_GNU_IFUNC 1498 && gsym->can_use_relative_reloc(false)) 1499 { 1500 index = this->ifunc_count_; 1501 plt_offset = plt_index_to_offset(index); 1502 gsym->set_plt_offset(plt_offset); 1503 ++this->ifunc_count_; 1504 Reloc_section* rel = this->rela_ifunc(symtab, layout); 1505 1506 struct Global_ifunc gi; 1507 gi.rel = rel; 1508 gi.gsym = gsym; 1509 gi.plt_index = index; 1510 this->global_ifuncs_.push_back(gi); 1511 } 1512 else 1513 { 1514 plt_offset = plt_index_to_offset(this->count_ + 4); 1515 gsym->set_plt_offset(plt_offset); 1516 ++this->count_; 1517 gsym->set_needs_dynsym_entry(); 1518 this->rel_->add_global(gsym, elfcpp::R_SPARC_JMP_SLOT, this, 1519 plt_offset, 0); 1520 } 1521 1522 // Note that we don't need to save the symbol. The contents of the 1523 // PLT are independent of which symbols are used. The symbols only 1524 // appear in the relocations. 1525} 1526 1527template<int size, bool big_endian> 1528unsigned int 1529Output_data_plt_sparc<size, big_endian>::add_local_ifunc_entry( 1530 Symbol_table* symtab, 1531 Layout* layout, 1532 Sized_relobj_file<size, big_endian>* relobj, 1533 unsigned int local_sym_index) 1534{ 1535 unsigned int index = this->ifunc_count_; 1536 section_offset_type plt_offset; 1537 1538 plt_offset = plt_index_to_offset(index); 1539 ++this->ifunc_count_; 1540 1541 Reloc_section* rel = this->rela_ifunc(symtab, layout); 1542 1543 struct Local_ifunc li; 1544 li.rel = rel; 1545 li.object = relobj; 1546 li.local_sym_index = local_sym_index; 1547 li.plt_index = index; 1548 this->local_ifuncs_.push_back(li); 1549 1550 return plt_offset; 1551} 1552 1553// Emit any pending IFUNC plt relocations. 1554 1555template<int size, bool big_endian> 1556void 1557Output_data_plt_sparc<size, big_endian>::emit_pending_ifunc_relocs() 1558{ 1559 // Emit any pending IFUNC relocs. 1560 for (typename std::vector<Global_ifunc>::const_iterator p = 1561 this->global_ifuncs_.begin(); 1562 p != this->global_ifuncs_.end(); 1563 ++p) 1564 { 1565 section_offset_type plt_offset; 1566 unsigned int index; 1567 1568 index = this->count_ + p->plt_index + 4; 1569 plt_offset = this->plt_index_to_offset(index); 1570 p->rel->add_symbolless_global_addend(p->gsym, elfcpp::R_SPARC_JMP_IREL, 1571 this, plt_offset, 0); 1572 } 1573 1574 for (typename std::vector<Local_ifunc>::const_iterator p = 1575 this->local_ifuncs_.begin(); 1576 p != this->local_ifuncs_.end(); 1577 ++p) 1578 { 1579 section_offset_type plt_offset; 1580 unsigned int index; 1581 1582 index = this->count_ + p->plt_index + 4; 1583 plt_offset = this->plt_index_to_offset(index); 1584 p->rel->add_symbolless_local_addend(p->object, p->local_sym_index, 1585 elfcpp::R_SPARC_JMP_IREL, 1586 this, plt_offset, 0); 1587 } 1588} 1589 1590// Return where the IFUNC relocations should go in the PLT. These 1591// follow the non-IFUNC relocations. 1592 1593template<int size, bool big_endian> 1594typename Output_data_plt_sparc<size, big_endian>::Reloc_section* 1595Output_data_plt_sparc<size, big_endian>::rela_ifunc( 1596 Symbol_table* symtab, 1597 Layout* layout) 1598{ 1599 if (this->ifunc_rel_ == NULL) 1600 { 1601 this->ifunc_rel_ = new Reloc_section(false); 1602 layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA, 1603 elfcpp::SHF_ALLOC, this->ifunc_rel_, 1604 ORDER_DYNAMIC_PLT_RELOCS, false); 1605 gold_assert(this->ifunc_rel_->output_section() 1606 == this->rel_->output_section()); 1607 1608 if (parameters->doing_static_link()) 1609 { 1610 // A statically linked executable will only have a .rel.plt 1611 // section to hold R_SPARC_IRELATIVE and R_SPARC_JMP_IREL 1612 // relocs for STT_GNU_IFUNC symbols. The library will use 1613 // these symbols to locate the IRELATIVE and JMP_IREL relocs 1614 // at program startup time. 1615 symtab->define_in_output_data("__rela_iplt_start", NULL, 1616 Symbol_table::PREDEFINED, 1617 this->ifunc_rel_, 0, 0, 1618 elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, 1619 elfcpp::STV_HIDDEN, 0, false, true); 1620 symtab->define_in_output_data("__rela_iplt_end", NULL, 1621 Symbol_table::PREDEFINED, 1622 this->ifunc_rel_, 0, 0, 1623 elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, 1624 elfcpp::STV_HIDDEN, 0, true, true); 1625 } 1626 } 1627 return this->ifunc_rel_; 1628} 1629 1630// Return the PLT address to use for a global symbol. 1631 1632template<int size, bool big_endian> 1633uint64_t 1634Output_data_plt_sparc<size, big_endian>::address_for_global(const Symbol* gsym) 1635{ 1636 uint64_t offset = 0; 1637 if (gsym->type() == elfcpp::STT_GNU_IFUNC 1638 && gsym->can_use_relative_reloc(false)) 1639 offset = plt_index_to_offset(this->count_ + 4); 1640 return this->address() + offset + gsym->plt_offset(); 1641} 1642 1643// Return the PLT address to use for a local symbol. These are always 1644// IRELATIVE relocs. 1645 1646template<int size, bool big_endian> 1647uint64_t 1648Output_data_plt_sparc<size, big_endian>::address_for_local( 1649 const Relobj* object, 1650 unsigned int r_sym) 1651{ 1652 return (this->address() 1653 + plt_index_to_offset(this->count_ + 4) 1654 + object->local_plt_offset(r_sym)); 1655} 1656 1657static const unsigned int sparc_nop = 0x01000000; 1658static const unsigned int sparc_sethi_g1 = 0x03000000; 1659static const unsigned int sparc_branch_always = 0x30800000; 1660static const unsigned int sparc_branch_always_pt = 0x30680000; 1661static const unsigned int sparc_mov = 0x80100000; 1662static const unsigned int sparc_mov_g0_o0 = 0x90100000; 1663static const unsigned int sparc_mov_o7_g5 = 0x8a10000f; 1664static const unsigned int sparc_call_plus_8 = 0x40000002; 1665static const unsigned int sparc_ldx_o7_imm_g1 = 0xc25be000; 1666static const unsigned int sparc_jmpl_o7_g1_g1 = 0x83c3c001; 1667static const unsigned int sparc_mov_g5_o7 = 0x9e100005; 1668 1669// Write out the PLT. 1670 1671template<int size, bool big_endian> 1672void 1673Output_data_plt_sparc<size, big_endian>::do_write(Output_file* of) 1674{ 1675 const off_t offset = this->offset(); 1676 const section_size_type oview_size = 1677 convert_to_section_size_type(this->data_size()); 1678 unsigned char* const oview = of->get_output_view(offset, oview_size); 1679 unsigned char* pov = oview; 1680 1681 memset(pov, 0, base_plt_entry_size * 4); 1682 pov += this->first_plt_entry_offset(); 1683 1684 unsigned int plt_offset = base_plt_entry_size * 4; 1685 const unsigned int count = this->entry_count(); 1686 1687 if (size == 64) 1688 { 1689 unsigned int limit; 1690 1691 limit = (count > 32768 ? 32768 : count); 1692 1693 for (unsigned int i = 0; i < limit; ++i) 1694 { 1695 elfcpp::Swap<32, true>::writeval(pov + 0x00, 1696 sparc_sethi_g1 + plt_offset); 1697 elfcpp::Swap<32, true>::writeval(pov + 0x04, 1698 sparc_branch_always_pt + 1699 (((base_plt_entry_size - 1700 (plt_offset + 4)) >> 2) & 1701 0x7ffff)); 1702 elfcpp::Swap<32, true>::writeval(pov + 0x08, sparc_nop); 1703 elfcpp::Swap<32, true>::writeval(pov + 0x0c, sparc_nop); 1704 elfcpp::Swap<32, true>::writeval(pov + 0x10, sparc_nop); 1705 elfcpp::Swap<32, true>::writeval(pov + 0x14, sparc_nop); 1706 elfcpp::Swap<32, true>::writeval(pov + 0x18, sparc_nop); 1707 elfcpp::Swap<32, true>::writeval(pov + 0x1c, sparc_nop); 1708 1709 pov += base_plt_entry_size; 1710 plt_offset += base_plt_entry_size; 1711 } 1712 1713 if (count > 32768) 1714 { 1715 unsigned int ext_cnt = count - 32768; 1716 unsigned int blks = ext_cnt / plt_entries_per_block; 1717 1718 for (unsigned int i = 0; i < blks; ++i) 1719 { 1720 unsigned int data_off = (plt_entries_per_block 1721 * plt_insn_chunk_size) - 4; 1722 1723 for (unsigned int j = 0; j < plt_entries_per_block; ++j) 1724 { 1725 elfcpp::Swap<32, true>::writeval(pov + 0x00, 1726 sparc_mov_o7_g5); 1727 elfcpp::Swap<32, true>::writeval(pov + 0x04, 1728 sparc_call_plus_8); 1729 elfcpp::Swap<32, true>::writeval(pov + 0x08, 1730 sparc_nop); 1731 elfcpp::Swap<32, true>::writeval(pov + 0x0c, 1732 sparc_ldx_o7_imm_g1 + 1733 (data_off & 0x1fff)); 1734 elfcpp::Swap<32, true>::writeval(pov + 0x10, 1735 sparc_jmpl_o7_g1_g1); 1736 elfcpp::Swap<32, true>::writeval(pov + 0x14, 1737 sparc_mov_g5_o7); 1738 1739 elfcpp::Swap<64, big_endian>::writeval( 1740 pov + 0x4 + data_off, 1741 (elfcpp::Elf_Xword) (oview - (pov + 0x04))); 1742 1743 pov += plt_insn_chunk_size; 1744 data_off -= 16; 1745 } 1746 } 1747 1748 unsigned int sub_blk_cnt = ext_cnt % plt_entries_per_block; 1749 for (unsigned int i = 0; i < sub_blk_cnt; ++i) 1750 { 1751 unsigned int data_off = (sub_blk_cnt 1752 * plt_insn_chunk_size) - 4; 1753 1754 for (unsigned int j = 0; j < plt_entries_per_block; ++j) 1755 { 1756 elfcpp::Swap<32, true>::writeval(pov + 0x00, 1757 sparc_mov_o7_g5); 1758 elfcpp::Swap<32, true>::writeval(pov + 0x04, 1759 sparc_call_plus_8); 1760 elfcpp::Swap<32, true>::writeval(pov + 0x08, 1761 sparc_nop); 1762 elfcpp::Swap<32, true>::writeval(pov + 0x0c, 1763 sparc_ldx_o7_imm_g1 + 1764 (data_off & 0x1fff)); 1765 elfcpp::Swap<32, true>::writeval(pov + 0x10, 1766 sparc_jmpl_o7_g1_g1); 1767 elfcpp::Swap<32, true>::writeval(pov + 0x14, 1768 sparc_mov_g5_o7); 1769 1770 elfcpp::Swap<64, big_endian>::writeval( 1771 pov + 0x4 + data_off, 1772 (elfcpp::Elf_Xword) (oview - (pov + 0x04))); 1773 1774 pov += plt_insn_chunk_size; 1775 data_off -= 16; 1776 } 1777 } 1778 } 1779 } 1780 else 1781 { 1782 for (unsigned int i = 0; i < count; ++i) 1783 { 1784 elfcpp::Swap<32, true>::writeval(pov + 0x00, 1785 sparc_sethi_g1 + plt_offset); 1786 elfcpp::Swap<32, true>::writeval(pov + 0x04, 1787 sparc_branch_always + 1788 (((- (plt_offset + 4)) >> 2) & 1789 0x003fffff)); 1790 elfcpp::Swap<32, true>::writeval(pov + 0x08, sparc_nop); 1791 1792 pov += base_plt_entry_size; 1793 plt_offset += base_plt_entry_size; 1794 } 1795 1796 elfcpp::Swap<32, true>::writeval(pov, sparc_nop); 1797 pov += 4; 1798 } 1799 1800 gold_assert(static_cast<section_size_type>(pov - oview) == oview_size); 1801 1802 of->write_output_view(offset, oview_size, oview); 1803} 1804 1805// Create the PLT section. 1806 1807template<int size, bool big_endian> 1808void 1809Target_sparc<size, big_endian>::make_plt_section(Symbol_table* symtab, 1810 Layout* layout) 1811{ 1812 // Create the GOT sections first. 1813 this->got_section(symtab, layout); 1814 1815 // Ensure that .rela.dyn always appears before .rela.plt This is 1816 // necessary due to how, on Sparc and some other targets, .rela.dyn 1817 // needs to include .rela.plt in it's range. 1818 this->rela_dyn_section(layout); 1819 1820 this->plt_ = new Output_data_plt_sparc<size, big_endian>(layout); 1821 layout->add_output_section_data(".plt", elfcpp::SHT_PROGBITS, 1822 (elfcpp::SHF_ALLOC 1823 | elfcpp::SHF_EXECINSTR 1824 | elfcpp::SHF_WRITE), 1825 this->plt_, ORDER_NON_RELRO_FIRST, false); 1826 1827 // Define _PROCEDURE_LINKAGE_TABLE_ at the start of the .plt section. 1828 symtab->define_in_output_data("_PROCEDURE_LINKAGE_TABLE_", NULL, 1829 Symbol_table::PREDEFINED, 1830 this->plt_, 1831 0, 0, elfcpp::STT_OBJECT, 1832 elfcpp::STB_LOCAL, 1833 elfcpp::STV_HIDDEN, 0, 1834 false, false); 1835} 1836 1837// Create a PLT entry for a global symbol. 1838 1839template<int size, bool big_endian> 1840void 1841Target_sparc<size, big_endian>::make_plt_entry(Symbol_table* symtab, 1842 Layout* layout, 1843 Symbol* gsym) 1844{ 1845 if (gsym->has_plt_offset()) 1846 return; 1847 1848 if (this->plt_ == NULL) 1849 this->make_plt_section(symtab, layout); 1850 1851 this->plt_->add_entry(symtab, layout, gsym); 1852} 1853 1854// Make a PLT entry for a local STT_GNU_IFUNC symbol. 1855 1856template<int size, bool big_endian> 1857void 1858Target_sparc<size, big_endian>::make_local_ifunc_plt_entry( 1859 Symbol_table* symtab, 1860 Layout* layout, 1861 Sized_relobj_file<size, big_endian>* relobj, 1862 unsigned int local_sym_index) 1863{ 1864 if (relobj->local_has_plt_offset(local_sym_index)) 1865 return; 1866 if (this->plt_ == NULL) 1867 this->make_plt_section(symtab, layout); 1868 unsigned int plt_offset = this->plt_->add_local_ifunc_entry(symtab, layout, 1869 relobj, 1870 local_sym_index); 1871 relobj->set_local_plt_offset(local_sym_index, plt_offset); 1872} 1873 1874// Return the number of entries in the PLT. 1875 1876template<int size, bool big_endian> 1877unsigned int 1878Target_sparc<size, big_endian>::plt_entry_count() const 1879{ 1880 if (this->plt_ == NULL) 1881 return 0; 1882 return this->plt_->entry_count(); 1883} 1884 1885// Return the offset of the first non-reserved PLT entry. 1886 1887template<int size, bool big_endian> 1888unsigned int 1889Target_sparc<size, big_endian>::first_plt_entry_offset() const 1890{ 1891 return Output_data_plt_sparc<size, big_endian>::first_plt_entry_offset(); 1892} 1893 1894// Return the size of each PLT entry. 1895 1896template<int size, bool big_endian> 1897unsigned int 1898Target_sparc<size, big_endian>::plt_entry_size() const 1899{ 1900 return Output_data_plt_sparc<size, big_endian>::get_plt_entry_size(); 1901} 1902 1903// Create a GOT entry for the TLS module index. 1904 1905template<int size, bool big_endian> 1906unsigned int 1907Target_sparc<size, big_endian>::got_mod_index_entry( 1908 Symbol_table* symtab, 1909 Layout* layout, 1910 Sized_relobj_file<size, big_endian>* object) 1911{ 1912 if (this->got_mod_index_offset_ == -1U) 1913 { 1914 gold_assert(symtab != NULL && layout != NULL && object != NULL); 1915 Reloc_section* rela_dyn = this->rela_dyn_section(layout); 1916 Output_data_got<size, big_endian>* got; 1917 unsigned int got_offset; 1918 1919 got = this->got_section(symtab, layout); 1920 got_offset = got->add_constant(0); 1921 rela_dyn->add_local(object, 0, 1922 (size == 64 ? 1923 elfcpp::R_SPARC_TLS_DTPMOD64 : 1924 elfcpp::R_SPARC_TLS_DTPMOD32), got, 1925 got_offset, 0); 1926 got->add_constant(0); 1927 this->got_mod_index_offset_ = got_offset; 1928 } 1929 return this->got_mod_index_offset_; 1930} 1931 1932// Optimize the TLS relocation type based on what we know about the 1933// symbol. IS_FINAL is true if the final address of this symbol is 1934// known at link time. 1935 1936static tls::Tls_optimization 1937optimize_tls_reloc(bool is_final, int r_type) 1938{ 1939 // If we are generating a shared library, then we can't do anything 1940 // in the linker. 1941 if (parameters->options().shared()) 1942 return tls::TLSOPT_NONE; 1943 1944 switch (r_type) 1945 { 1946 case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic 1947 case elfcpp::R_SPARC_TLS_GD_LO10: 1948 case elfcpp::R_SPARC_TLS_GD_ADD: 1949 case elfcpp::R_SPARC_TLS_GD_CALL: 1950 // These are General-Dynamic which permits fully general TLS 1951 // access. Since we know that we are generating an executable, 1952 // we can convert this to Initial-Exec. If we also know that 1953 // this is a local symbol, we can further switch to Local-Exec. 1954 if (is_final) 1955 return tls::TLSOPT_TO_LE; 1956 return tls::TLSOPT_TO_IE; 1957 1958 case elfcpp::R_SPARC_TLS_LDM_HI22: // Local-dynamic 1959 case elfcpp::R_SPARC_TLS_LDM_LO10: 1960 case elfcpp::R_SPARC_TLS_LDM_ADD: 1961 case elfcpp::R_SPARC_TLS_LDM_CALL: 1962 // This is Local-Dynamic, which refers to a local symbol in the 1963 // dynamic TLS block. Since we know that we generating an 1964 // executable, we can switch to Local-Exec. 1965 return tls::TLSOPT_TO_LE; 1966 1967 case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic 1968 case elfcpp::R_SPARC_TLS_LDO_LOX10: 1969 case elfcpp::R_SPARC_TLS_LDO_ADD: 1970 // Another type of Local-Dynamic relocation. 1971 return tls::TLSOPT_TO_LE; 1972 1973 case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec 1974 case elfcpp::R_SPARC_TLS_IE_LO10: 1975 case elfcpp::R_SPARC_TLS_IE_LD: 1976 case elfcpp::R_SPARC_TLS_IE_LDX: 1977 case elfcpp::R_SPARC_TLS_IE_ADD: 1978 // These are Initial-Exec relocs which get the thread offset 1979 // from the GOT. If we know that we are linking against the 1980 // local symbol, we can switch to Local-Exec, which links the 1981 // thread offset into the instruction. 1982 if (is_final) 1983 return tls::TLSOPT_TO_LE; 1984 return tls::TLSOPT_NONE; 1985 1986 case elfcpp::R_SPARC_TLS_LE_HIX22: // Local-exec 1987 case elfcpp::R_SPARC_TLS_LE_LOX10: 1988 // When we already have Local-Exec, there is nothing further we 1989 // can do. 1990 return tls::TLSOPT_NONE; 1991 1992 default: 1993 gold_unreachable(); 1994 } 1995} 1996 1997// Get the Reference_flags for a particular relocation. 1998 1999template<int size, bool big_endian> 2000int 2001Target_sparc<size, big_endian>::Scan::get_reference_flags(unsigned int r_type) 2002{ 2003 r_type &= 0xff; 2004 switch (r_type) 2005 { 2006 case elfcpp::R_SPARC_NONE: 2007 case elfcpp::R_SPARC_REGISTER: 2008 case elfcpp::R_SPARC_GNU_VTINHERIT: 2009 case elfcpp::R_SPARC_GNU_VTENTRY: 2010 // No symbol reference. 2011 return 0; 2012 2013 case elfcpp::R_SPARC_UA64: 2014 case elfcpp::R_SPARC_64: 2015 case elfcpp::R_SPARC_HIX22: 2016 case elfcpp::R_SPARC_LOX10: 2017 case elfcpp::R_SPARC_H34: 2018 case elfcpp::R_SPARC_H44: 2019 case elfcpp::R_SPARC_M44: 2020 case elfcpp::R_SPARC_L44: 2021 case elfcpp::R_SPARC_HH22: 2022 case elfcpp::R_SPARC_HM10: 2023 case elfcpp::R_SPARC_LM22: 2024 case elfcpp::R_SPARC_HI22: 2025 case elfcpp::R_SPARC_LO10: 2026 case elfcpp::R_SPARC_OLO10: 2027 case elfcpp::R_SPARC_UA32: 2028 case elfcpp::R_SPARC_32: 2029 case elfcpp::R_SPARC_UA16: 2030 case elfcpp::R_SPARC_16: 2031 case elfcpp::R_SPARC_11: 2032 case elfcpp::R_SPARC_10: 2033 case elfcpp::R_SPARC_8: 2034 case elfcpp::R_SPARC_7: 2035 case elfcpp::R_SPARC_6: 2036 case elfcpp::R_SPARC_5: 2037 return Symbol::ABSOLUTE_REF; 2038 2039 case elfcpp::R_SPARC_DISP8: 2040 case elfcpp::R_SPARC_DISP16: 2041 case elfcpp::R_SPARC_DISP32: 2042 case elfcpp::R_SPARC_DISP64: 2043 case elfcpp::R_SPARC_PC_HH22: 2044 case elfcpp::R_SPARC_PC_HM10: 2045 case elfcpp::R_SPARC_PC_LM22: 2046 case elfcpp::R_SPARC_PC10: 2047 case elfcpp::R_SPARC_PC22: 2048 case elfcpp::R_SPARC_WDISP30: 2049 case elfcpp::R_SPARC_WDISP22: 2050 case elfcpp::R_SPARC_WDISP19: 2051 case elfcpp::R_SPARC_WDISP16: 2052 case elfcpp::R_SPARC_WDISP10: 2053 return Symbol::RELATIVE_REF; 2054 2055 case elfcpp::R_SPARC_PLT64: 2056 case elfcpp::R_SPARC_PLT32: 2057 case elfcpp::R_SPARC_HIPLT22: 2058 case elfcpp::R_SPARC_LOPLT10: 2059 case elfcpp::R_SPARC_PCPLT10: 2060 return Symbol::FUNCTION_CALL | Symbol::ABSOLUTE_REF; 2061 2062 case elfcpp::R_SPARC_PCPLT32: 2063 case elfcpp::R_SPARC_PCPLT22: 2064 case elfcpp::R_SPARC_WPLT30: 2065 return Symbol::FUNCTION_CALL | Symbol::RELATIVE_REF; 2066 2067 case elfcpp::R_SPARC_GOTDATA_OP: 2068 case elfcpp::R_SPARC_GOTDATA_OP_HIX22: 2069 case elfcpp::R_SPARC_GOTDATA_OP_LOX10: 2070 case elfcpp::R_SPARC_GOT10: 2071 case elfcpp::R_SPARC_GOT13: 2072 case elfcpp::R_SPARC_GOT22: 2073 // Absolute in GOT. 2074 return Symbol::ABSOLUTE_REF; 2075 2076 case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic 2077 case elfcpp::R_SPARC_TLS_GD_LO10: 2078 case elfcpp::R_SPARC_TLS_GD_ADD: 2079 case elfcpp::R_SPARC_TLS_GD_CALL: 2080 case elfcpp::R_SPARC_TLS_LDM_HI22: // Local-dynamic 2081 case elfcpp::R_SPARC_TLS_LDM_LO10: 2082 case elfcpp::R_SPARC_TLS_LDM_ADD: 2083 case elfcpp::R_SPARC_TLS_LDM_CALL: 2084 case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic 2085 case elfcpp::R_SPARC_TLS_LDO_LOX10: 2086 case elfcpp::R_SPARC_TLS_LDO_ADD: 2087 case elfcpp::R_SPARC_TLS_LE_HIX22: 2088 case elfcpp::R_SPARC_TLS_LE_LOX10: 2089 case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec 2090 case elfcpp::R_SPARC_TLS_IE_LO10: 2091 case elfcpp::R_SPARC_TLS_IE_LD: 2092 case elfcpp::R_SPARC_TLS_IE_LDX: 2093 case elfcpp::R_SPARC_TLS_IE_ADD: 2094 return Symbol::TLS_REF; 2095 2096 case elfcpp::R_SPARC_COPY: 2097 case elfcpp::R_SPARC_GLOB_DAT: 2098 case elfcpp::R_SPARC_JMP_SLOT: 2099 case elfcpp::R_SPARC_JMP_IREL: 2100 case elfcpp::R_SPARC_RELATIVE: 2101 case elfcpp::R_SPARC_IRELATIVE: 2102 case elfcpp::R_SPARC_TLS_DTPMOD64: 2103 case elfcpp::R_SPARC_TLS_DTPMOD32: 2104 case elfcpp::R_SPARC_TLS_DTPOFF64: 2105 case elfcpp::R_SPARC_TLS_DTPOFF32: 2106 case elfcpp::R_SPARC_TLS_TPOFF64: 2107 case elfcpp::R_SPARC_TLS_TPOFF32: 2108 default: 2109 // Not expected. We will give an error later. 2110 return 0; 2111 } 2112} 2113 2114// Generate a PLT entry slot for a call to __tls_get_addr 2115template<int size, bool big_endian> 2116void 2117Target_sparc<size, big_endian>::Scan::generate_tls_call(Symbol_table* symtab, 2118 Layout* layout, 2119 Target_sparc<size, big_endian>* target) 2120{ 2121 Symbol* gsym = target->tls_get_addr_sym(symtab); 2122 2123 target->make_plt_entry(symtab, layout, gsym); 2124} 2125 2126// Report an unsupported relocation against a local symbol. 2127 2128template<int size, bool big_endian> 2129void 2130Target_sparc<size, big_endian>::Scan::unsupported_reloc_local( 2131 Sized_relobj_file<size, big_endian>* object, 2132 unsigned int r_type) 2133{ 2134 gold_error(_("%s: unsupported reloc %u against local symbol"), 2135 object->name().c_str(), r_type); 2136} 2137 2138// We are about to emit a dynamic relocation of type R_TYPE. If the 2139// dynamic linker does not support it, issue an error. 2140 2141template<int size, bool big_endian> 2142void 2143Target_sparc<size, big_endian>::Scan::check_non_pic(Relobj* object, unsigned int r_type) 2144{ 2145 gold_assert(r_type != elfcpp::R_SPARC_NONE); 2146 2147 if (size == 64) 2148 { 2149 switch (r_type) 2150 { 2151 // These are the relocation types supported by glibc for sparc 64-bit. 2152 case elfcpp::R_SPARC_RELATIVE: 2153 case elfcpp::R_SPARC_IRELATIVE: 2154 case elfcpp::R_SPARC_COPY: 2155 case elfcpp::R_SPARC_32: 2156 case elfcpp::R_SPARC_64: 2157 case elfcpp::R_SPARC_GLOB_DAT: 2158 case elfcpp::R_SPARC_JMP_SLOT: 2159 case elfcpp::R_SPARC_JMP_IREL: 2160 case elfcpp::R_SPARC_TLS_DTPMOD64: 2161 case elfcpp::R_SPARC_TLS_DTPOFF64: 2162 case elfcpp::R_SPARC_TLS_TPOFF64: 2163 case elfcpp::R_SPARC_TLS_LE_HIX22: 2164 case elfcpp::R_SPARC_TLS_LE_LOX10: 2165 case elfcpp::R_SPARC_8: 2166 case elfcpp::R_SPARC_16: 2167 case elfcpp::R_SPARC_DISP8: 2168 case elfcpp::R_SPARC_DISP16: 2169 case elfcpp::R_SPARC_DISP32: 2170 case elfcpp::R_SPARC_WDISP30: 2171 case elfcpp::R_SPARC_LO10: 2172 case elfcpp::R_SPARC_HI22: 2173 case elfcpp::R_SPARC_OLO10: 2174 case elfcpp::R_SPARC_H34: 2175 case elfcpp::R_SPARC_H44: 2176 case elfcpp::R_SPARC_M44: 2177 case elfcpp::R_SPARC_L44: 2178 case elfcpp::R_SPARC_HH22: 2179 case elfcpp::R_SPARC_HM10: 2180 case elfcpp::R_SPARC_LM22: 2181 case elfcpp::R_SPARC_UA16: 2182 case elfcpp::R_SPARC_UA32: 2183 case elfcpp::R_SPARC_UA64: 2184 return; 2185 2186 default: 2187 break; 2188 } 2189 } 2190 else 2191 { 2192 switch (r_type) 2193 { 2194 // These are the relocation types supported by glibc for sparc 32-bit. 2195 case elfcpp::R_SPARC_RELATIVE: 2196 case elfcpp::R_SPARC_IRELATIVE: 2197 case elfcpp::R_SPARC_COPY: 2198 case elfcpp::R_SPARC_GLOB_DAT: 2199 case elfcpp::R_SPARC_32: 2200 case elfcpp::R_SPARC_JMP_SLOT: 2201 case elfcpp::R_SPARC_JMP_IREL: 2202 case elfcpp::R_SPARC_TLS_DTPMOD32: 2203 case elfcpp::R_SPARC_TLS_DTPOFF32: 2204 case elfcpp::R_SPARC_TLS_TPOFF32: 2205 case elfcpp::R_SPARC_TLS_LE_HIX22: 2206 case elfcpp::R_SPARC_TLS_LE_LOX10: 2207 case elfcpp::R_SPARC_8: 2208 case elfcpp::R_SPARC_16: 2209 case elfcpp::R_SPARC_DISP8: 2210 case elfcpp::R_SPARC_DISP16: 2211 case elfcpp::R_SPARC_DISP32: 2212 case elfcpp::R_SPARC_LO10: 2213 case elfcpp::R_SPARC_WDISP30: 2214 case elfcpp::R_SPARC_HI22: 2215 case elfcpp::R_SPARC_UA16: 2216 case elfcpp::R_SPARC_UA32: 2217 return; 2218 2219 default: 2220 break; 2221 } 2222 } 2223 2224 // This prevents us from issuing more than one error per reloc 2225 // section. But we can still wind up issuing more than one 2226 // error per object file. 2227 if (this->issued_non_pic_error_) 2228 return; 2229 gold_assert(parameters->options().output_is_position_independent()); 2230 object->error(_("requires unsupported dynamic reloc; " 2231 "recompile with -fPIC")); 2232 this->issued_non_pic_error_ = true; 2233 return; 2234} 2235 2236// Return whether we need to make a PLT entry for a relocation of the 2237// given type against a STT_GNU_IFUNC symbol. 2238 2239template<int size, bool big_endian> 2240bool 2241Target_sparc<size, big_endian>::Scan::reloc_needs_plt_for_ifunc( 2242 Sized_relobj_file<size, big_endian>* object, 2243 unsigned int r_type) 2244{ 2245 int flags = Scan::get_reference_flags(r_type); 2246 if (flags & Symbol::TLS_REF) 2247 gold_error(_("%s: unsupported TLS reloc %u for IFUNC symbol"), 2248 object->name().c_str(), r_type); 2249 return flags != 0; 2250} 2251 2252// Scan a relocation for a local symbol. 2253 2254template<int size, bool big_endian> 2255inline void 2256Target_sparc<size, big_endian>::Scan::local( 2257 Symbol_table* symtab, 2258 Layout* layout, 2259 Target_sparc<size, big_endian>* target, 2260 Sized_relobj_file<size, big_endian>* object, 2261 unsigned int data_shndx, 2262 Output_section* output_section, 2263 const elfcpp::Rela<size, big_endian>& reloc, 2264 unsigned int r_type, 2265 const elfcpp::Sym<size, big_endian>& lsym, 2266 bool is_discarded) 2267{ 2268 if (is_discarded) 2269 return; 2270 2271 bool is_ifunc = lsym.get_st_type() == elfcpp::STT_GNU_IFUNC; 2272 unsigned int orig_r_type = r_type; 2273 r_type &= 0xff; 2274 2275 if (is_ifunc 2276 && this->reloc_needs_plt_for_ifunc(object, r_type)) 2277 { 2278 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); 2279 target->make_local_ifunc_plt_entry(symtab, layout, object, r_sym); 2280 } 2281 2282 switch (r_type) 2283 { 2284 case elfcpp::R_SPARC_NONE: 2285 case elfcpp::R_SPARC_REGISTER: 2286 case elfcpp::R_SPARC_GNU_VTINHERIT: 2287 case elfcpp::R_SPARC_GNU_VTENTRY: 2288 break; 2289 2290 case elfcpp::R_SPARC_64: 2291 case elfcpp::R_SPARC_32: 2292 // If building a shared library (or a position-independent 2293 // executable), we need to create a dynamic relocation for 2294 // this location. The relocation applied at link time will 2295 // apply the link-time value, so we flag the location with 2296 // an R_SPARC_RELATIVE relocation so the dynamic loader can 2297 // relocate it easily. 2298 if (parameters->options().output_is_position_independent() 2299 && ((size == 64 && r_type == elfcpp::R_SPARC_64) 2300 || (size == 32 && r_type == elfcpp::R_SPARC_32))) 2301 { 2302 Reloc_section* rela_dyn = target->rela_dyn_section(layout); 2303 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); 2304 rela_dyn->add_local_relative(object, r_sym, elfcpp::R_SPARC_RELATIVE, 2305 output_section, data_shndx, 2306 reloc.get_r_offset(), 2307 reloc.get_r_addend(), is_ifunc); 2308 break; 2309 } 2310 // Fall through. 2311 2312 case elfcpp::R_SPARC_HIX22: 2313 case elfcpp::R_SPARC_LOX10: 2314 case elfcpp::R_SPARC_H34: 2315 case elfcpp::R_SPARC_H44: 2316 case elfcpp::R_SPARC_M44: 2317 case elfcpp::R_SPARC_L44: 2318 case elfcpp::R_SPARC_HH22: 2319 case elfcpp::R_SPARC_HM10: 2320 case elfcpp::R_SPARC_LM22: 2321 case elfcpp::R_SPARC_UA64: 2322 case elfcpp::R_SPARC_UA32: 2323 case elfcpp::R_SPARC_UA16: 2324 case elfcpp::R_SPARC_HI22: 2325 case elfcpp::R_SPARC_LO10: 2326 case elfcpp::R_SPARC_OLO10: 2327 case elfcpp::R_SPARC_16: 2328 case elfcpp::R_SPARC_11: 2329 case elfcpp::R_SPARC_10: 2330 case elfcpp::R_SPARC_8: 2331 case elfcpp::R_SPARC_7: 2332 case elfcpp::R_SPARC_6: 2333 case elfcpp::R_SPARC_5: 2334 // If building a shared library (or a position-independent 2335 // executable), we need to create a dynamic relocation for 2336 // this location. 2337 if (parameters->options().output_is_position_independent()) 2338 { 2339 Reloc_section* rela_dyn = target->rela_dyn_section(layout); 2340 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); 2341 2342 check_non_pic(object, r_type); 2343 if (lsym.get_st_type() != elfcpp::STT_SECTION) 2344 { 2345 rela_dyn->add_local(object, r_sym, orig_r_type, output_section, 2346 data_shndx, reloc.get_r_offset(), 2347 reloc.get_r_addend()); 2348 } 2349 else 2350 { 2351 gold_assert(lsym.get_st_value() == 0); 2352 rela_dyn->add_symbolless_local_addend(object, r_sym, orig_r_type, 2353 output_section, data_shndx, 2354 reloc.get_r_offset(), 2355 reloc.get_r_addend()); 2356 } 2357 } 2358 break; 2359 2360 case elfcpp::R_SPARC_WDISP30: 2361 case elfcpp::R_SPARC_WPLT30: 2362 case elfcpp::R_SPARC_WDISP22: 2363 case elfcpp::R_SPARC_WDISP19: 2364 case elfcpp::R_SPARC_WDISP16: 2365 case elfcpp::R_SPARC_WDISP10: 2366 case elfcpp::R_SPARC_DISP8: 2367 case elfcpp::R_SPARC_DISP16: 2368 case elfcpp::R_SPARC_DISP32: 2369 case elfcpp::R_SPARC_DISP64: 2370 case elfcpp::R_SPARC_PC10: 2371 case elfcpp::R_SPARC_PC22: 2372 break; 2373 2374 case elfcpp::R_SPARC_GOTDATA_OP: 2375 case elfcpp::R_SPARC_GOTDATA_OP_HIX22: 2376 case elfcpp::R_SPARC_GOTDATA_OP_LOX10: 2377 // We will optimize this into a GOT relative relocation 2378 // and code transform the GOT load into an addition. 2379 break; 2380 2381 case elfcpp::R_SPARC_GOT10: 2382 case elfcpp::R_SPARC_GOT13: 2383 case elfcpp::R_SPARC_GOT22: 2384 { 2385 // The symbol requires a GOT entry. 2386 Output_data_got<size, big_endian>* got; 2387 unsigned int r_sym; 2388 2389 got = target->got_section(symtab, layout); 2390 r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); 2391 2392 // If we are generating a shared object, we need to add a 2393 // dynamic relocation for this symbol's GOT entry. 2394 if (parameters->options().output_is_position_independent()) 2395 { 2396 if (!object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)) 2397 { 2398 Reloc_section* rela_dyn = target->rela_dyn_section(layout); 2399 unsigned int off = got->add_constant(0); 2400 object->set_local_got_offset(r_sym, GOT_TYPE_STANDARD, off); 2401 rela_dyn->add_local_relative(object, r_sym, 2402 elfcpp::R_SPARC_RELATIVE, 2403 got, off, 0, is_ifunc); 2404 } 2405 } 2406 else 2407 got->add_local(object, r_sym, GOT_TYPE_STANDARD); 2408 } 2409 break; 2410 2411 // These are initial TLS relocs, which are expected when 2412 // linking. 2413 case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic 2414 case elfcpp::R_SPARC_TLS_GD_LO10: 2415 case elfcpp::R_SPARC_TLS_GD_ADD: 2416 case elfcpp::R_SPARC_TLS_GD_CALL: 2417 case elfcpp::R_SPARC_TLS_LDM_HI22 : // Local-dynamic 2418 case elfcpp::R_SPARC_TLS_LDM_LO10: 2419 case elfcpp::R_SPARC_TLS_LDM_ADD: 2420 case elfcpp::R_SPARC_TLS_LDM_CALL: 2421 case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic 2422 case elfcpp::R_SPARC_TLS_LDO_LOX10: 2423 case elfcpp::R_SPARC_TLS_LDO_ADD: 2424 case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec 2425 case elfcpp::R_SPARC_TLS_IE_LO10: 2426 case elfcpp::R_SPARC_TLS_IE_LD: 2427 case elfcpp::R_SPARC_TLS_IE_LDX: 2428 case elfcpp::R_SPARC_TLS_IE_ADD: 2429 case elfcpp::R_SPARC_TLS_LE_HIX22: // Local-exec 2430 case elfcpp::R_SPARC_TLS_LE_LOX10: 2431 { 2432 bool output_is_shared = parameters->options().shared(); 2433 const tls::Tls_optimization optimized_type 2434 = optimize_tls_reloc(!output_is_shared, r_type); 2435 switch (r_type) 2436 { 2437 case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic 2438 case elfcpp::R_SPARC_TLS_GD_LO10: 2439 case elfcpp::R_SPARC_TLS_GD_ADD: 2440 case elfcpp::R_SPARC_TLS_GD_CALL: 2441 if (optimized_type == tls::TLSOPT_NONE) 2442 { 2443 // Create a pair of GOT entries for the module index and 2444 // dtv-relative offset. 2445 Output_data_got<size, big_endian>* got 2446 = target->got_section(symtab, layout); 2447 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); 2448 unsigned int shndx = lsym.get_st_shndx(); 2449 bool is_ordinary; 2450 shndx = object->adjust_sym_shndx(r_sym, shndx, &is_ordinary); 2451 if (!is_ordinary) 2452 object->error(_("local symbol %u has bad shndx %u"), 2453 r_sym, shndx); 2454 else 2455 got->add_local_pair_with_rel(object, r_sym, 2456 lsym.get_st_shndx(), 2457 GOT_TYPE_TLS_PAIR, 2458 target->rela_dyn_section(layout), 2459 (size == 64 2460 ? elfcpp::R_SPARC_TLS_DTPMOD64 2461 : elfcpp::R_SPARC_TLS_DTPMOD32)); 2462 if (r_type == elfcpp::R_SPARC_TLS_GD_CALL) 2463 generate_tls_call(symtab, layout, target); 2464 } 2465 else if (optimized_type != tls::TLSOPT_TO_LE) 2466 unsupported_reloc_local(object, r_type); 2467 break; 2468 2469 case elfcpp::R_SPARC_TLS_LDM_HI22 : // Local-dynamic 2470 case elfcpp::R_SPARC_TLS_LDM_LO10: 2471 case elfcpp::R_SPARC_TLS_LDM_ADD: 2472 case elfcpp::R_SPARC_TLS_LDM_CALL: 2473 if (optimized_type == tls::TLSOPT_NONE) 2474 { 2475 // Create a GOT entry for the module index. 2476 target->got_mod_index_entry(symtab, layout, object); 2477 2478 if (r_type == elfcpp::R_SPARC_TLS_LDM_CALL) 2479 generate_tls_call(symtab, layout, target); 2480 } 2481 else if (optimized_type != tls::TLSOPT_TO_LE) 2482 unsupported_reloc_local(object, r_type); 2483 break; 2484 2485 case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic 2486 case elfcpp::R_SPARC_TLS_LDO_LOX10: 2487 case elfcpp::R_SPARC_TLS_LDO_ADD: 2488 break; 2489 2490 case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec 2491 case elfcpp::R_SPARC_TLS_IE_LO10: 2492 case elfcpp::R_SPARC_TLS_IE_LD: 2493 case elfcpp::R_SPARC_TLS_IE_LDX: 2494 case elfcpp::R_SPARC_TLS_IE_ADD: 2495 layout->set_has_static_tls(); 2496 if (optimized_type == tls::TLSOPT_NONE) 2497 { 2498 // Create a GOT entry for the tp-relative offset. 2499 Output_data_got<size, big_endian>* got 2500 = target->got_section(symtab, layout); 2501 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); 2502 2503 if (!object->local_has_got_offset(r_sym, GOT_TYPE_TLS_OFFSET)) 2504 { 2505 Reloc_section* rela_dyn = target->rela_dyn_section(layout); 2506 unsigned int off = got->add_constant(0); 2507 2508 object->set_local_got_offset(r_sym, GOT_TYPE_TLS_OFFSET, off); 2509 2510 rela_dyn->add_symbolless_local_addend(object, r_sym, 2511 (size == 64 ? 2512 elfcpp::R_SPARC_TLS_TPOFF64 : 2513 elfcpp::R_SPARC_TLS_TPOFF32), 2514 got, off, 0); 2515 } 2516 } 2517 else if (optimized_type != tls::TLSOPT_TO_LE) 2518 unsupported_reloc_local(object, r_type); 2519 break; 2520 2521 case elfcpp::R_SPARC_TLS_LE_HIX22: // Local-exec 2522 case elfcpp::R_SPARC_TLS_LE_LOX10: 2523 layout->set_has_static_tls(); 2524 if (output_is_shared) 2525 { 2526 // We need to create a dynamic relocation. 2527 gold_assert(lsym.get_st_type() != elfcpp::STT_SECTION); 2528 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); 2529 Reloc_section* rela_dyn = target->rela_dyn_section(layout); 2530 rela_dyn->add_symbolless_local_addend(object, r_sym, r_type, 2531 output_section, data_shndx, 2532 reloc.get_r_offset(), 0); 2533 } 2534 break; 2535 } 2536 } 2537 break; 2538 2539 // These are relocations which should only be seen by the 2540 // dynamic linker, and should never be seen here. 2541 case elfcpp::R_SPARC_COPY: 2542 case elfcpp::R_SPARC_GLOB_DAT: 2543 case elfcpp::R_SPARC_JMP_SLOT: 2544 case elfcpp::R_SPARC_JMP_IREL: 2545 case elfcpp::R_SPARC_RELATIVE: 2546 case elfcpp::R_SPARC_IRELATIVE: 2547 case elfcpp::R_SPARC_TLS_DTPMOD64: 2548 case elfcpp::R_SPARC_TLS_DTPMOD32: 2549 case elfcpp::R_SPARC_TLS_DTPOFF64: 2550 case elfcpp::R_SPARC_TLS_DTPOFF32: 2551 case elfcpp::R_SPARC_TLS_TPOFF64: 2552 case elfcpp::R_SPARC_TLS_TPOFF32: 2553 gold_error(_("%s: unexpected reloc %u in object file"), 2554 object->name().c_str(), r_type); 2555 break; 2556 2557 default: 2558 unsupported_reloc_local(object, r_type); 2559 break; 2560 } 2561} 2562 2563// Report an unsupported relocation against a global symbol. 2564 2565template<int size, bool big_endian> 2566void 2567Target_sparc<size, big_endian>::Scan::unsupported_reloc_global( 2568 Sized_relobj_file<size, big_endian>* object, 2569 unsigned int r_type, 2570 Symbol* gsym) 2571{ 2572 gold_error(_("%s: unsupported reloc %u against global symbol %s"), 2573 object->name().c_str(), r_type, gsym->demangled_name().c_str()); 2574} 2575 2576// Scan a relocation for a global symbol. 2577 2578template<int size, bool big_endian> 2579inline void 2580Target_sparc<size, big_endian>::Scan::global( 2581 Symbol_table* symtab, 2582 Layout* layout, 2583 Target_sparc<size, big_endian>* target, 2584 Sized_relobj_file<size, big_endian>* object, 2585 unsigned int data_shndx, 2586 Output_section* output_section, 2587 const elfcpp::Rela<size, big_endian>& reloc, 2588 unsigned int r_type, 2589 Symbol* gsym) 2590{ 2591 unsigned int orig_r_type = r_type; 2592 bool is_ifunc = gsym->type() == elfcpp::STT_GNU_IFUNC; 2593 2594 // A reference to _GLOBAL_OFFSET_TABLE_ implies that we need a got 2595 // section. We check here to avoid creating a dynamic reloc against 2596 // _GLOBAL_OFFSET_TABLE_. 2597 if (!target->has_got_section() 2598 && strcmp(gsym->name(), "_GLOBAL_OFFSET_TABLE_") == 0) 2599 target->got_section(symtab, layout); 2600 2601 r_type &= 0xff; 2602 2603 // A STT_GNU_IFUNC symbol may require a PLT entry. 2604 if (is_ifunc 2605 && this->reloc_needs_plt_for_ifunc(object, r_type)) 2606 target->make_plt_entry(symtab, layout, gsym); 2607 2608 switch (r_type) 2609 { 2610 case elfcpp::R_SPARC_NONE: 2611 case elfcpp::R_SPARC_REGISTER: 2612 case elfcpp::R_SPARC_GNU_VTINHERIT: 2613 case elfcpp::R_SPARC_GNU_VTENTRY: 2614 break; 2615 2616 case elfcpp::R_SPARC_PLT64: 2617 case elfcpp::R_SPARC_PLT32: 2618 case elfcpp::R_SPARC_HIPLT22: 2619 case elfcpp::R_SPARC_LOPLT10: 2620 case elfcpp::R_SPARC_PCPLT32: 2621 case elfcpp::R_SPARC_PCPLT22: 2622 case elfcpp::R_SPARC_PCPLT10: 2623 case elfcpp::R_SPARC_WPLT30: 2624 // If the symbol is fully resolved, this is just a PC32 reloc. 2625 // Otherwise we need a PLT entry. 2626 if (gsym->final_value_is_known()) 2627 break; 2628 // If building a shared library, we can also skip the PLT entry 2629 // if the symbol is defined in the output file and is protected 2630 // or hidden. 2631 if (gsym->is_defined() 2632 && !gsym->is_from_dynobj() 2633 && !gsym->is_preemptible()) 2634 break; 2635 target->make_plt_entry(symtab, layout, gsym); 2636 break; 2637 2638 case elfcpp::R_SPARC_DISP8: 2639 case elfcpp::R_SPARC_DISP16: 2640 case elfcpp::R_SPARC_DISP32: 2641 case elfcpp::R_SPARC_DISP64: 2642 case elfcpp::R_SPARC_PC_HH22: 2643 case elfcpp::R_SPARC_PC_HM10: 2644 case elfcpp::R_SPARC_PC_LM22: 2645 case elfcpp::R_SPARC_PC10: 2646 case elfcpp::R_SPARC_PC22: 2647 case elfcpp::R_SPARC_WDISP30: 2648 case elfcpp::R_SPARC_WDISP22: 2649 case elfcpp::R_SPARC_WDISP19: 2650 case elfcpp::R_SPARC_WDISP16: 2651 case elfcpp::R_SPARC_WDISP10: 2652 { 2653 if (gsym->needs_plt_entry()) 2654 target->make_plt_entry(symtab, layout, gsym); 2655 // Make a dynamic relocation if necessary. 2656 if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type))) 2657 { 2658 if (parameters->options().output_is_executable() 2659 && gsym->may_need_copy_reloc()) 2660 { 2661 target->copy_reloc(symtab, layout, object, 2662 data_shndx, output_section, gsym, 2663 reloc); 2664 } 2665 else 2666 { 2667 Reloc_section* rela_dyn = target->rela_dyn_section(layout); 2668 check_non_pic(object, r_type); 2669 rela_dyn->add_global(gsym, orig_r_type, output_section, object, 2670 data_shndx, reloc.get_r_offset(), 2671 reloc.get_r_addend()); 2672 } 2673 } 2674 } 2675 break; 2676 2677 case elfcpp::R_SPARC_UA64: 2678 case elfcpp::R_SPARC_64: 2679 case elfcpp::R_SPARC_HIX22: 2680 case elfcpp::R_SPARC_LOX10: 2681 case elfcpp::R_SPARC_H34: 2682 case elfcpp::R_SPARC_H44: 2683 case elfcpp::R_SPARC_M44: 2684 case elfcpp::R_SPARC_L44: 2685 case elfcpp::R_SPARC_HH22: 2686 case elfcpp::R_SPARC_HM10: 2687 case elfcpp::R_SPARC_LM22: 2688 case elfcpp::R_SPARC_HI22: 2689 case elfcpp::R_SPARC_LO10: 2690 case elfcpp::R_SPARC_OLO10: 2691 case elfcpp::R_SPARC_UA32: 2692 case elfcpp::R_SPARC_32: 2693 case elfcpp::R_SPARC_UA16: 2694 case elfcpp::R_SPARC_16: 2695 case elfcpp::R_SPARC_11: 2696 case elfcpp::R_SPARC_10: 2697 case elfcpp::R_SPARC_8: 2698 case elfcpp::R_SPARC_7: 2699 case elfcpp::R_SPARC_6: 2700 case elfcpp::R_SPARC_5: 2701 { 2702 // Make a PLT entry if necessary. 2703 if (gsym->needs_plt_entry()) 2704 { 2705 target->make_plt_entry(symtab, layout, gsym); 2706 // Since this is not a PC-relative relocation, we may be 2707 // taking the address of a function. In that case we need to 2708 // set the entry in the dynamic symbol table to the address of 2709 // the PLT entry. 2710 if (gsym->is_from_dynobj() && !parameters->options().shared()) 2711 gsym->set_needs_dynsym_value(); 2712 } 2713 // Make a dynamic relocation if necessary. 2714 if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type))) 2715 { 2716 unsigned int r_off = reloc.get_r_offset(); 2717 2718 // The assembler can sometimes emit unaligned relocations 2719 // for dwarf2 cfi directives. 2720 switch (r_type) 2721 { 2722 case elfcpp::R_SPARC_16: 2723 if (r_off & 0x1) 2724 orig_r_type = r_type = elfcpp::R_SPARC_UA16; 2725 break; 2726 case elfcpp::R_SPARC_32: 2727 if (r_off & 0x3) 2728 orig_r_type = r_type = elfcpp::R_SPARC_UA32; 2729 break; 2730 case elfcpp::R_SPARC_64: 2731 if (r_off & 0x7) 2732 orig_r_type = r_type = elfcpp::R_SPARC_UA64; 2733 break; 2734 case elfcpp::R_SPARC_UA16: 2735 if (!(r_off & 0x1)) 2736 orig_r_type = r_type = elfcpp::R_SPARC_16; 2737 break; 2738 case elfcpp::R_SPARC_UA32: 2739 if (!(r_off & 0x3)) 2740 orig_r_type = r_type = elfcpp::R_SPARC_32; 2741 break; 2742 case elfcpp::R_SPARC_UA64: 2743 if (!(r_off & 0x7)) 2744 orig_r_type = r_type = elfcpp::R_SPARC_64; 2745 break; 2746 } 2747 2748 if (!parameters->options().output_is_position_independent() 2749 && gsym->may_need_copy_reloc()) 2750 { 2751 target->copy_reloc(symtab, layout, object, 2752 data_shndx, output_section, gsym, reloc); 2753 } 2754 else if (((size == 64 && r_type == elfcpp::R_SPARC_64) 2755 || (size == 32 && r_type == elfcpp::R_SPARC_32)) 2756 && gsym->type() == elfcpp::STT_GNU_IFUNC 2757 && gsym->can_use_relative_reloc(false) 2758 && !gsym->is_from_dynobj() 2759 && !gsym->is_undefined() 2760 && !gsym->is_preemptible()) 2761 { 2762 // Use an IRELATIVE reloc for a locally defined 2763 // STT_GNU_IFUNC symbol. This makes a function 2764 // address in a PIE executable match the address in a 2765 // shared library that it links against. 2766 Reloc_section* rela_dyn = 2767 target->rela_ifunc_section(layout); 2768 unsigned int r_type = elfcpp::R_SPARC_IRELATIVE; 2769 rela_dyn->add_symbolless_global_addend(gsym, r_type, 2770 output_section, object, 2771 data_shndx, 2772 reloc.get_r_offset(), 2773 reloc.get_r_addend()); 2774 } 2775 else if (((size == 64 && r_type == elfcpp::R_SPARC_64) 2776 || (size == 32 && r_type == elfcpp::R_SPARC_32)) 2777 && gsym->can_use_relative_reloc(false)) 2778 { 2779 Reloc_section* rela_dyn = target->rela_dyn_section(layout); 2780 rela_dyn->add_global_relative(gsym, elfcpp::R_SPARC_RELATIVE, 2781 output_section, object, 2782 data_shndx, reloc.get_r_offset(), 2783 reloc.get_r_addend(), is_ifunc); 2784 } 2785 else 2786 { 2787 Reloc_section* rela_dyn = target->rela_dyn_section(layout); 2788 2789 check_non_pic(object, r_type); 2790 if (gsym->is_from_dynobj() 2791 || gsym->is_undefined() 2792 || gsym->is_preemptible()) 2793 rela_dyn->add_global(gsym, orig_r_type, output_section, 2794 object, data_shndx, 2795 reloc.get_r_offset(), 2796 reloc.get_r_addend()); 2797 else 2798 rela_dyn->add_symbolless_global_addend(gsym, orig_r_type, 2799 output_section, 2800 object, data_shndx, 2801 reloc.get_r_offset(), 2802 reloc.get_r_addend()); 2803 } 2804 } 2805 } 2806 break; 2807 2808 case elfcpp::R_SPARC_GOTDATA_OP: 2809 case elfcpp::R_SPARC_GOTDATA_OP_HIX22: 2810 case elfcpp::R_SPARC_GOTDATA_OP_LOX10: 2811 if (gsym->is_defined() 2812 && !gsym->is_from_dynobj() 2813 && !gsym->is_preemptible() 2814 && !is_ifunc) 2815 { 2816 // We will optimize this into a GOT relative relocation 2817 // and code transform the GOT load into an addition. 2818 break; 2819 } 2820 // Fall through. 2821 case elfcpp::R_SPARC_GOT10: 2822 case elfcpp::R_SPARC_GOT13: 2823 case elfcpp::R_SPARC_GOT22: 2824 { 2825 // The symbol requires a GOT entry. 2826 Output_data_got<size, big_endian>* got; 2827 2828 got = target->got_section(symtab, layout); 2829 if (gsym->final_value_is_known()) 2830 { 2831 // For a STT_GNU_IFUNC symbol we want the PLT address. 2832 if (gsym->type() == elfcpp::STT_GNU_IFUNC) 2833 got->add_global_plt(gsym, GOT_TYPE_STANDARD); 2834 else 2835 got->add_global(gsym, GOT_TYPE_STANDARD); 2836 } 2837 else 2838 { 2839 // If this symbol is not fully resolved, we need to add a 2840 // GOT entry with a dynamic relocation. 2841 bool is_ifunc = gsym->type() == elfcpp::STT_GNU_IFUNC; 2842 2843 // Use a GLOB_DAT rather than a RELATIVE reloc if: 2844 // 2845 // 1) The symbol may be defined in some other module. 2846 // 2847 // 2) We are building a shared library and this is a 2848 // protected symbol; using GLOB_DAT means that the dynamic 2849 // linker can use the address of the PLT in the main 2850 // executable when appropriate so that function address 2851 // comparisons work. 2852 // 2853 // 3) This is a STT_GNU_IFUNC symbol in position dependent 2854 // code, again so that function address comparisons work. 2855 Reloc_section* rela_dyn = target->rela_dyn_section(layout); 2856 if (gsym->is_from_dynobj() 2857 || gsym->is_undefined() 2858 || gsym->is_preemptible() 2859 || (gsym->visibility() == elfcpp::STV_PROTECTED 2860 && parameters->options().shared()) 2861 || (gsym->type() == elfcpp::STT_GNU_IFUNC 2862 && parameters->options().output_is_position_independent() 2863 && !gsym->is_forced_local())) 2864 { 2865 unsigned int r_type = elfcpp::R_SPARC_GLOB_DAT; 2866 2867 // If this symbol is forced local, this relocation will 2868 // not work properly. That's because ld.so on sparc 2869 // (and 32-bit powerpc) expects st_value in the r_addend 2870 // of relocations for STB_LOCAL symbols. Curiously the 2871 // BFD linker does not promote global hidden symbols to be 2872 // STB_LOCAL in the dynamic symbol table like Gold does. 2873 gold_assert(!gsym->is_forced_local()); 2874 got->add_global_with_rel(gsym, GOT_TYPE_STANDARD, rela_dyn, 2875 r_type); 2876 } 2877 else if (!gsym->has_got_offset(GOT_TYPE_STANDARD)) 2878 { 2879 unsigned int off = got->add_constant(0); 2880 2881 gsym->set_got_offset(GOT_TYPE_STANDARD, off); 2882 if (is_ifunc) 2883 { 2884 // Tell the dynamic linker to use the PLT address 2885 // when resolving relocations. 2886 if (gsym->is_from_dynobj() 2887 && !parameters->options().shared()) 2888 gsym->set_needs_dynsym_value(); 2889 } 2890 rela_dyn->add_global_relative(gsym, elfcpp::R_SPARC_RELATIVE, 2891 got, off, 0, is_ifunc); 2892 } 2893 } 2894 } 2895 break; 2896 2897 // These are initial tls relocs, which are expected when 2898 // linking. 2899 case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic 2900 case elfcpp::R_SPARC_TLS_GD_LO10: 2901 case elfcpp::R_SPARC_TLS_GD_ADD: 2902 case elfcpp::R_SPARC_TLS_GD_CALL: 2903 case elfcpp::R_SPARC_TLS_LDM_HI22: // Local-dynamic 2904 case elfcpp::R_SPARC_TLS_LDM_LO10: 2905 case elfcpp::R_SPARC_TLS_LDM_ADD: 2906 case elfcpp::R_SPARC_TLS_LDM_CALL: 2907 case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic 2908 case elfcpp::R_SPARC_TLS_LDO_LOX10: 2909 case elfcpp::R_SPARC_TLS_LDO_ADD: 2910 case elfcpp::R_SPARC_TLS_LE_HIX22: 2911 case elfcpp::R_SPARC_TLS_LE_LOX10: 2912 case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec 2913 case elfcpp::R_SPARC_TLS_IE_LO10: 2914 case elfcpp::R_SPARC_TLS_IE_LD: 2915 case elfcpp::R_SPARC_TLS_IE_LDX: 2916 case elfcpp::R_SPARC_TLS_IE_ADD: 2917 { 2918 const bool is_final = gsym->final_value_is_known(); 2919 const tls::Tls_optimization optimized_type 2920 = optimize_tls_reloc(is_final, r_type); 2921 switch (r_type) 2922 { 2923 case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic 2924 case elfcpp::R_SPARC_TLS_GD_LO10: 2925 case elfcpp::R_SPARC_TLS_GD_ADD: 2926 case elfcpp::R_SPARC_TLS_GD_CALL: 2927 if (optimized_type == tls::TLSOPT_NONE) 2928 { 2929 // Create a pair of GOT entries for the module index and 2930 // dtv-relative offset. 2931 Output_data_got<size, big_endian>* got 2932 = target->got_section(symtab, layout); 2933 got->add_global_pair_with_rel(gsym, GOT_TYPE_TLS_PAIR, 2934 target->rela_dyn_section(layout), 2935 (size == 64 2936 ? elfcpp::R_SPARC_TLS_DTPMOD64 2937 : elfcpp::R_SPARC_TLS_DTPMOD32), 2938 (size == 64 2939 ? elfcpp::R_SPARC_TLS_DTPOFF64 2940 : elfcpp::R_SPARC_TLS_DTPOFF32)); 2941 2942 // Emit R_SPARC_WPLT30 against "__tls_get_addr" 2943 if (r_type == elfcpp::R_SPARC_TLS_GD_CALL) 2944 generate_tls_call(symtab, layout, target); 2945 } 2946 else if (optimized_type == tls::TLSOPT_TO_IE) 2947 { 2948 // Create a GOT entry for the tp-relative offset. 2949 Output_data_got<size, big_endian>* got 2950 = target->got_section(symtab, layout); 2951 got->add_global_with_rel(gsym, GOT_TYPE_TLS_OFFSET, 2952 target->rela_dyn_section(layout), 2953 (size == 64 ? 2954 elfcpp::R_SPARC_TLS_TPOFF64 : 2955 elfcpp::R_SPARC_TLS_TPOFF32)); 2956 } 2957 else if (optimized_type != tls::TLSOPT_TO_LE) 2958 unsupported_reloc_global(object, r_type, gsym); 2959 break; 2960 2961 case elfcpp::R_SPARC_TLS_LDM_HI22: // Local-dynamic 2962 case elfcpp::R_SPARC_TLS_LDM_LO10: 2963 case elfcpp::R_SPARC_TLS_LDM_ADD: 2964 case elfcpp::R_SPARC_TLS_LDM_CALL: 2965 if (optimized_type == tls::TLSOPT_NONE) 2966 { 2967 // Create a GOT entry for the module index. 2968 target->got_mod_index_entry(symtab, layout, object); 2969 2970 if (r_type == elfcpp::R_SPARC_TLS_LDM_CALL) 2971 generate_tls_call(symtab, layout, target); 2972 } 2973 else if (optimized_type != tls::TLSOPT_TO_LE) 2974 unsupported_reloc_global(object, r_type, gsym); 2975 break; 2976 2977 case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic 2978 case elfcpp::R_SPARC_TLS_LDO_LOX10: 2979 case elfcpp::R_SPARC_TLS_LDO_ADD: 2980 break; 2981 2982 case elfcpp::R_SPARC_TLS_LE_HIX22: 2983 case elfcpp::R_SPARC_TLS_LE_LOX10: 2984 layout->set_has_static_tls(); 2985 if (parameters->options().shared()) 2986 { 2987 Reloc_section* rela_dyn = target->rela_dyn_section(layout); 2988 rela_dyn->add_symbolless_global_addend(gsym, orig_r_type, 2989 output_section, object, 2990 data_shndx, reloc.get_r_offset(), 2991 0); 2992 } 2993 break; 2994 2995 case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec 2996 case elfcpp::R_SPARC_TLS_IE_LO10: 2997 case elfcpp::R_SPARC_TLS_IE_LD: 2998 case elfcpp::R_SPARC_TLS_IE_LDX: 2999 case elfcpp::R_SPARC_TLS_IE_ADD: 3000 layout->set_has_static_tls(); 3001 if (optimized_type == tls::TLSOPT_NONE) 3002 { 3003 // Create a GOT entry for the tp-relative offset. 3004 Output_data_got<size, big_endian>* got 3005 = target->got_section(symtab, layout); 3006 got->add_global_with_rel(gsym, GOT_TYPE_TLS_OFFSET, 3007 target->rela_dyn_section(layout), 3008 (size == 64 3009 ? elfcpp::R_SPARC_TLS_TPOFF64 3010 : elfcpp::R_SPARC_TLS_TPOFF32)); 3011 } 3012 else if (optimized_type != tls::TLSOPT_TO_LE) 3013 unsupported_reloc_global(object, r_type, gsym); 3014 break; 3015 } 3016 } 3017 break; 3018 3019 // These are relocations which should only be seen by the 3020 // dynamic linker, and should never be seen here. 3021 case elfcpp::R_SPARC_COPY: 3022 case elfcpp::R_SPARC_GLOB_DAT: 3023 case elfcpp::R_SPARC_JMP_SLOT: 3024 case elfcpp::R_SPARC_JMP_IREL: 3025 case elfcpp::R_SPARC_RELATIVE: 3026 case elfcpp::R_SPARC_IRELATIVE: 3027 case elfcpp::R_SPARC_TLS_DTPMOD64: 3028 case elfcpp::R_SPARC_TLS_DTPMOD32: 3029 case elfcpp::R_SPARC_TLS_DTPOFF64: 3030 case elfcpp::R_SPARC_TLS_DTPOFF32: 3031 case elfcpp::R_SPARC_TLS_TPOFF64: 3032 case elfcpp::R_SPARC_TLS_TPOFF32: 3033 gold_error(_("%s: unexpected reloc %u in object file"), 3034 object->name().c_str(), r_type); 3035 break; 3036 3037 default: 3038 unsupported_reloc_global(object, r_type, gsym); 3039 break; 3040 } 3041} 3042 3043// Make a new symbol table entry. 3044// STT_SPARC_REGISTER symbols require special handling, 3045// so we intercept these symbols and keep track of them separately. 3046// We will resolve register symbols here and output them at symbol 3047// finalization time. 3048 3049template<int size, bool big_endian> 3050Sized_symbol<size>* 3051Target_sparc<size, big_endian>::make_symbol(const char* name, 3052 elfcpp::STT type, 3053 Object* object, 3054 unsigned int shndx, 3055 uint64_t value) 3056{ 3057 // REGISTER symbols are used only on SPARC-64. 3058 if (size == 64 && type == elfcpp::STT_SPARC_REGISTER) 3059 { 3060 // Ignore REGISTER symbols in dynamic objects. 3061 if (object->is_dynamic()) 3062 return NULL; 3063 // Only registers 2, 3, 6, and 7 can be declared global. 3064 int reg = value; 3065 switch (reg) 3066 { 3067 case 2: case 3: 3068 reg -= 2; 3069 break; 3070 case 6: case 7: 3071 reg -= 4; 3072 break; 3073 default: 3074 gold_error(_("%s: only registers %%g[2367] can be declared " 3075 "using STT_REGISTER"), 3076 object->name().c_str()); 3077 return NULL; 3078 } 3079 Register_symbol& rsym = this->register_syms_[reg]; 3080 if (rsym.name == NULL) 3081 { 3082 rsym.name = name; 3083 rsym.shndx = shndx; 3084 rsym.obj = object; 3085 } 3086 else 3087 { 3088 if (strcmp(rsym.name, name) != 0) 3089 { 3090 gold_error(_("%s: register %%g%d declared as '%s'; " 3091 "previously declared as '%s' in %s"), 3092 object->name().c_str(), 3093 static_cast<int>(value), 3094 *name ? name : "#scratch", 3095 *rsym.name ? rsym.name : "#scratch", 3096 rsym.obj->name().c_str()); 3097 return NULL; 3098 } 3099 } 3100 return NULL; 3101 } 3102 return new Sized_symbol<size>(); 3103} 3104 3105// Process relocations for gc. 3106 3107template<int size, bool big_endian> 3108void 3109Target_sparc<size, big_endian>::gc_process_relocs( 3110 Symbol_table* symtab, 3111 Layout* layout, 3112 Sized_relobj_file<size, big_endian>* object, 3113 unsigned int data_shndx, 3114 unsigned int, 3115 const unsigned char* prelocs, 3116 size_t reloc_count, 3117 Output_section* output_section, 3118 bool needs_special_offset_handling, 3119 size_t local_symbol_count, 3120 const unsigned char* plocal_symbols) 3121{ 3122 typedef Target_sparc<size, big_endian> Sparc; 3123 typedef typename Target_sparc<size, big_endian>::Scan Scan; 3124 typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> 3125 Classify_reloc; 3126 3127 gold::gc_process_relocs<size, big_endian, Sparc, Scan, Classify_reloc>( 3128 symtab, 3129 layout, 3130 this, 3131 object, 3132 data_shndx, 3133 prelocs, 3134 reloc_count, 3135 output_section, 3136 needs_special_offset_handling, 3137 local_symbol_count, 3138 plocal_symbols); 3139} 3140 3141// Scan relocations for a section. 3142 3143template<int size, bool big_endian> 3144void 3145Target_sparc<size, big_endian>::scan_relocs( 3146 Symbol_table* symtab, 3147 Layout* layout, 3148 Sized_relobj_file<size, big_endian>* object, 3149 unsigned int data_shndx, 3150 unsigned int sh_type, 3151 const unsigned char* prelocs, 3152 size_t reloc_count, 3153 Output_section* output_section, 3154 bool needs_special_offset_handling, 3155 size_t local_symbol_count, 3156 const unsigned char* plocal_symbols) 3157{ 3158 typedef Target_sparc<size, big_endian> Sparc; 3159 typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> 3160 Classify_reloc; 3161 3162 if (sh_type == elfcpp::SHT_REL) 3163 { 3164 gold_error(_("%s: unsupported REL reloc section"), 3165 object->name().c_str()); 3166 return; 3167 } 3168 3169 gold::scan_relocs<size, big_endian, Sparc, Scan, Classify_reloc>( 3170 symtab, 3171 layout, 3172 this, 3173 object, 3174 data_shndx, 3175 prelocs, 3176 reloc_count, 3177 output_section, 3178 needs_special_offset_handling, 3179 local_symbol_count, 3180 plocal_symbols); 3181} 3182 3183// Finalize the sections. 3184 3185template<int size, bool big_endian> 3186void 3187Target_sparc<size, big_endian>::do_finalize_sections( 3188 Layout* layout, 3189 const Input_objects*, 3190 Symbol_table* symtab) 3191{ 3192 if (this->plt_) 3193 this->plt_->emit_pending_ifunc_relocs(); 3194 3195 // Fill in some more dynamic tags. 3196 const Reloc_section* rel_plt = (this->plt_ == NULL 3197 ? NULL 3198 : this->plt_->rel_plt()); 3199 layout->add_target_dynamic_tags(false, this->plt_, rel_plt, 3200 this->rela_dyn_, true, true); 3201 3202 // Emit any relocs we saved in an attempt to avoid generating COPY 3203 // relocs. 3204 if (this->copy_relocs_.any_saved_relocs()) 3205 this->copy_relocs_.emit(this->rela_dyn_section(layout)); 3206 3207 if (parameters->doing_static_link() 3208 && (this->plt_ == NULL || !this->plt_->has_ifunc_section())) 3209 { 3210 // If linking statically, make sure that the __rela_iplt symbols 3211 // were defined if necessary, even if we didn't create a PLT. 3212 static const Define_symbol_in_segment syms[] = 3213 { 3214 { 3215 "__rela_iplt_start", // name 3216 elfcpp::PT_LOAD, // segment_type 3217 elfcpp::PF_W, // segment_flags_set 3218 elfcpp::PF(0), // segment_flags_clear 3219 0, // value 3220 0, // size 3221 elfcpp::STT_NOTYPE, // type 3222 elfcpp::STB_GLOBAL, // binding 3223 elfcpp::STV_HIDDEN, // visibility 3224 0, // nonvis 3225 Symbol::SEGMENT_START, // offset_from_base 3226 true // only_if_ref 3227 }, 3228 { 3229 "__rela_iplt_end", // name 3230 elfcpp::PT_LOAD, // segment_type 3231 elfcpp::PF_W, // segment_flags_set 3232 elfcpp::PF(0), // segment_flags_clear 3233 0, // value 3234 0, // size 3235 elfcpp::STT_NOTYPE, // type 3236 elfcpp::STB_GLOBAL, // binding 3237 elfcpp::STV_HIDDEN, // visibility 3238 0, // nonvis 3239 Symbol::SEGMENT_START, // offset_from_base 3240 true // only_if_ref 3241 } 3242 }; 3243 3244 symtab->define_symbols(layout, 2, syms, 3245 layout->script_options()->saw_sections_clause()); 3246 } 3247 3248 for (int reg = 0; reg < 4; ++reg) 3249 { 3250 Register_symbol& rsym = this->register_syms_[reg]; 3251 if (rsym.name != NULL) 3252 { 3253 int value = reg < 3 ? reg + 2 : reg + 4; 3254 Sized_symbol<size>* sym = new Sized_symbol<size>(); 3255 if (rsym.shndx == elfcpp::SHN_UNDEF) 3256 sym->init_undefined(rsym.name, NULL, value, 3257 elfcpp::STT_SPARC_REGISTER, elfcpp::STB_GLOBAL, 3258 elfcpp::STV_DEFAULT, 0); 3259 else 3260 sym->init_constant(rsym.name, NULL, value, 0, 3261 elfcpp::STT_SPARC_REGISTER, elfcpp::STB_GLOBAL, 3262 elfcpp::STV_DEFAULT, 0, false); 3263 symtab->add_target_global_symbol(sym); 3264 layout->add_target_specific_dynamic_tag(elfcpp::DT_SPARC_REGISTER, 3265 value); 3266 } 3267 } 3268} 3269 3270// Perform a relocation. 3271 3272template<int size, bool big_endian> 3273inline bool 3274Target_sparc<size, big_endian>::Relocate::relocate( 3275 const Relocate_info<size, big_endian>* relinfo, 3276 unsigned int, 3277 Target_sparc* target, 3278 Output_section*, 3279 size_t relnum, 3280 const unsigned char* preloc, 3281 const Sized_symbol<size>* gsym, 3282 const Symbol_value<size>* psymval, 3283 unsigned char* view, 3284 typename elfcpp::Elf_types<size>::Elf_Addr address, 3285 section_size_type view_size) 3286{ 3287 const elfcpp::Rela<size, big_endian> rela(preloc); 3288 unsigned int r_type = elfcpp::elf_r_type<size>(rela.get_r_info()); 3289 bool orig_is_ifunc = psymval->is_ifunc_symbol(); 3290 r_type &= 0xff; 3291 3292 if (this->ignore_gd_add_) 3293 { 3294 if (r_type != elfcpp::R_SPARC_TLS_GD_ADD) 3295 gold_error_at_location(relinfo, relnum, rela.get_r_offset(), 3296 _("missing expected TLS relocation")); 3297 else 3298 { 3299 this->ignore_gd_add_ = false; 3300 return false; 3301 } 3302 } 3303 3304 if (view == NULL) 3305 return true; 3306 3307 if (this->reloc_adjust_addr_ == view) 3308 view -= 4; 3309 3310 typedef Sparc_relocate_functions<size, big_endian> Reloc; 3311 const Sized_relobj_file<size, big_endian>* object = relinfo->object; 3312 3313 // Pick the value to use for symbols defined in shared objects. 3314 Symbol_value<size> symval; 3315 if (gsym != NULL 3316 && gsym->use_plt_offset(Scan::get_reference_flags(r_type))) 3317 { 3318 elfcpp::Elf_Xword value; 3319 3320 value = target->plt_address_for_global(gsym); 3321 3322 symval.set_output_value(value); 3323 3324 psymval = &symval; 3325 } 3326 else if (gsym == NULL && orig_is_ifunc) 3327 { 3328 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); 3329 if (object->local_has_plt_offset(r_sym)) 3330 { 3331 symval.set_output_value(target->plt_address_for_local(object, r_sym)); 3332 psymval = &symval; 3333 } 3334 } 3335 3336 const elfcpp::Elf_Xword addend = rela.get_r_addend(); 3337 3338 // Get the GOT offset if needed. Unlike i386 and x86_64, our GOT 3339 // pointer points to the beginning, not the end, of the table. 3340 // So we just use the plain offset. 3341 unsigned int got_offset = 0; 3342 bool gdop_valid = false; 3343 switch (r_type) 3344 { 3345 case elfcpp::R_SPARC_GOTDATA_OP: 3346 case elfcpp::R_SPARC_GOTDATA_OP_HIX22: 3347 case elfcpp::R_SPARC_GOTDATA_OP_LOX10: 3348 // If this is local, we did not create a GOT entry because we 3349 // intend to transform this into a GOT relative relocation. 3350 if (gsym == NULL 3351 || (gsym->is_defined() 3352 && !gsym->is_from_dynobj() 3353 && !gsym->is_preemptible() 3354 && !orig_is_ifunc)) 3355 { 3356 got_offset = psymval->value(object, addend) - target->got_address(); 3357 gdop_valid = true; 3358 break; 3359 } 3360 // Fall through. 3361 case elfcpp::R_SPARC_GOT10: 3362 case elfcpp::R_SPARC_GOT13: 3363 case elfcpp::R_SPARC_GOT22: 3364 if (gsym != NULL) 3365 { 3366 gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD)); 3367 got_offset = gsym->got_offset(GOT_TYPE_STANDARD); 3368 } 3369 else 3370 { 3371 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); 3372 gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)); 3373 got_offset = object->local_got_offset(r_sym, GOT_TYPE_STANDARD); 3374 } 3375 break; 3376 3377 default: 3378 break; 3379 } 3380 3381 switch (r_type) 3382 { 3383 case elfcpp::R_SPARC_NONE: 3384 case elfcpp::R_SPARC_REGISTER: 3385 case elfcpp::R_SPARC_GNU_VTINHERIT: 3386 case elfcpp::R_SPARC_GNU_VTENTRY: 3387 break; 3388 3389 case elfcpp::R_SPARC_8: 3390 Relocate_functions<size, big_endian>::rela8(view, object, 3391 psymval, addend); 3392 break; 3393 3394 case elfcpp::R_SPARC_16: 3395 if (rela.get_r_offset() & 0x1) 3396 { 3397 // The assembler can sometimes emit unaligned relocations 3398 // for dwarf2 cfi directives. 3399 Reloc::ua16(view, object, psymval, addend); 3400 } 3401 else 3402 Relocate_functions<size, big_endian>::rela16(view, object, 3403 psymval, addend); 3404 break; 3405 3406 case elfcpp::R_SPARC_32: 3407 if (!parameters->options().output_is_position_independent()) 3408 { 3409 if (rela.get_r_offset() & 0x3) 3410 { 3411 // The assembler can sometimes emit unaligned relocations 3412 // for dwarf2 cfi directives. 3413 Reloc::ua32(view, object, psymval, addend); 3414 } 3415 else 3416 Relocate_functions<size, big_endian>::rela32(view, object, 3417 psymval, addend); 3418 } 3419 break; 3420 3421 case elfcpp::R_SPARC_DISP8: 3422 Reloc::disp8(view, object, psymval, addend, address); 3423 break; 3424 3425 case elfcpp::R_SPARC_DISP16: 3426 Reloc::disp16(view, object, psymval, addend, address); 3427 break; 3428 3429 case elfcpp::R_SPARC_DISP32: 3430 Reloc::disp32(view, object, psymval, addend, address); 3431 break; 3432 3433 case elfcpp::R_SPARC_DISP64: 3434 Reloc::disp64(view, object, psymval, addend, address); 3435 break; 3436 3437 case elfcpp::R_SPARC_WDISP30: 3438 case elfcpp::R_SPARC_WPLT30: 3439 Reloc::wdisp30(view, object, psymval, addend, address); 3440 if (target->may_relax()) 3441 relax_call(target, view, rela, view_size); 3442 break; 3443 3444 case elfcpp::R_SPARC_WDISP22: 3445 Reloc::wdisp22(view, object, psymval, addend, address); 3446 break; 3447 3448 case elfcpp::R_SPARC_WDISP19: 3449 Reloc::wdisp19(view, object, psymval, addend, address); 3450 break; 3451 3452 case elfcpp::R_SPARC_WDISP16: 3453 Reloc::wdisp16(view, object, psymval, addend, address); 3454 break; 3455 3456 case elfcpp::R_SPARC_WDISP10: 3457 Reloc::wdisp10(view, object, psymval, addend, address); 3458 break; 3459 3460 case elfcpp::R_SPARC_HI22: 3461 Reloc::hi22(view, object, psymval, addend); 3462 break; 3463 3464 case elfcpp::R_SPARC_22: 3465 Reloc::rela32_22(view, object, psymval, addend); 3466 break; 3467 3468 case elfcpp::R_SPARC_13: 3469 Reloc::rela32_13(view, object, psymval, addend); 3470 break; 3471 3472 case elfcpp::R_SPARC_LO10: 3473 Reloc::lo10(view, object, psymval, addend); 3474 break; 3475 3476 case elfcpp::R_SPARC_GOTDATA_OP_LOX10: 3477 if (gdop_valid) 3478 { 3479 Reloc::gdop_lox10(view, got_offset); 3480 break; 3481 } 3482 // Fall through. 3483 case elfcpp::R_SPARC_GOT10: 3484 Reloc::lo10(view, got_offset, addend); 3485 break; 3486 3487 case elfcpp::R_SPARC_GOTDATA_OP: 3488 if (gdop_valid) 3489 { 3490 typedef typename elfcpp::Swap<32, true>::Valtype Insntype; 3491 Insntype* wv = reinterpret_cast<Insntype*>(view); 3492 Insntype val; 3493 3494 // {ld,ldx} [%rs1 + %rs2], %rd --> add %rs1, %rs2, %rd 3495 val = elfcpp::Swap<32, true>::readval(wv); 3496 val = 0x80000000 | (val & 0x3e07c01f); 3497 elfcpp::Swap<32, true>::writeval(wv, val); 3498 } 3499 break; 3500 3501 case elfcpp::R_SPARC_GOT13: 3502 Reloc::rela32_13(view, got_offset, addend); 3503 break; 3504 3505 case elfcpp::R_SPARC_GOTDATA_OP_HIX22: 3506 if (gdop_valid) 3507 { 3508 Reloc::gdop_hix22(view, got_offset); 3509 break; 3510 } 3511 // Fall through. 3512 case elfcpp::R_SPARC_GOT22: 3513 Reloc::hi22(view, got_offset, addend); 3514 break; 3515 3516 case elfcpp::R_SPARC_PC10: 3517 Reloc::pc10(view, object, psymval, addend, address); 3518 break; 3519 3520 case elfcpp::R_SPARC_PC22: 3521 Reloc::pc22(view, object, psymval, addend, address); 3522 break; 3523 3524 case elfcpp::R_SPARC_TLS_DTPOFF32: 3525 case elfcpp::R_SPARC_UA32: 3526 Reloc::ua32(view, object, psymval, addend); 3527 break; 3528 3529 case elfcpp::R_SPARC_PLT64: 3530 Relocate_functions<size, big_endian>::rela64(view, object, 3531 psymval, addend); 3532 break; 3533 3534 case elfcpp::R_SPARC_PLT32: 3535 Relocate_functions<size, big_endian>::rela32(view, object, 3536 psymval, addend); 3537 break; 3538 3539 case elfcpp::R_SPARC_HIPLT22: 3540 Reloc::hi22(view, object, psymval, addend); 3541 break; 3542 3543 case elfcpp::R_SPARC_LOPLT10: 3544 Reloc::lo10(view, object, psymval, addend); 3545 break; 3546 3547 case elfcpp::R_SPARC_PCPLT32: 3548 Reloc::disp32(view, object, psymval, addend, address); 3549 break; 3550 3551 case elfcpp::R_SPARC_PCPLT22: 3552 Reloc::pcplt22(view, object, psymval, addend, address); 3553 break; 3554 3555 case elfcpp::R_SPARC_PCPLT10: 3556 Reloc::lo10(view, object, psymval, addend, address); 3557 break; 3558 3559 case elfcpp::R_SPARC_64: 3560 if (!parameters->options().output_is_position_independent()) 3561 { 3562 if (rela.get_r_offset() & 0x7) 3563 { 3564 // The assembler can sometimes emit unaligned relocations 3565 // for dwarf2 cfi directives. 3566 Reloc::ua64(view, object, psymval, addend); 3567 } 3568 else 3569 Relocate_functions<size, big_endian>::rela64(view, object, 3570 psymval, addend); 3571 } 3572 break; 3573 3574 case elfcpp::R_SPARC_OLO10: 3575 { 3576 unsigned int addend2 = rela.get_r_info() & 0xffffffff; 3577 addend2 = ((addend2 >> 8) ^ 0x800000) - 0x800000; 3578 Reloc::olo10(view, object, psymval, addend, addend2); 3579 } 3580 break; 3581 3582 case elfcpp::R_SPARC_HH22: 3583 Reloc::hh22(view, object, psymval, addend); 3584 break; 3585 3586 case elfcpp::R_SPARC_PC_HH22: 3587 Reloc::pc_hh22(view, object, psymval, addend, address); 3588 break; 3589 3590 case elfcpp::R_SPARC_HM10: 3591 Reloc::hm10(view, object, psymval, addend); 3592 break; 3593 3594 case elfcpp::R_SPARC_PC_HM10: 3595 Reloc::pc_hm10(view, object, psymval, addend, address); 3596 break; 3597 3598 case elfcpp::R_SPARC_LM22: 3599 Reloc::hi22(view, object, psymval, addend); 3600 break; 3601 3602 case elfcpp::R_SPARC_PC_LM22: 3603 Reloc::pcplt22(view, object, psymval, addend, address); 3604 break; 3605 3606 case elfcpp::R_SPARC_11: 3607 Reloc::rela32_11(view, object, psymval, addend); 3608 break; 3609 3610 case elfcpp::R_SPARC_10: 3611 Reloc::rela32_10(view, object, psymval, addend); 3612 break; 3613 3614 case elfcpp::R_SPARC_7: 3615 Reloc::rela32_7(view, object, psymval, addend); 3616 break; 3617 3618 case elfcpp::R_SPARC_6: 3619 Reloc::rela32_6(view, object, psymval, addend); 3620 break; 3621 3622 case elfcpp::R_SPARC_5: 3623 Reloc::rela32_5(view, object, psymval, addend); 3624 break; 3625 3626 case elfcpp::R_SPARC_HIX22: 3627 Reloc::hix22(view, object, psymval, addend); 3628 break; 3629 3630 case elfcpp::R_SPARC_LOX10: 3631 Reloc::lox10(view, object, psymval, addend); 3632 break; 3633 3634 case elfcpp::R_SPARC_H34: 3635 Reloc::h34(view, object, psymval, addend); 3636 break; 3637 3638 case elfcpp::R_SPARC_H44: 3639 Reloc::h44(view, object, psymval, addend); 3640 break; 3641 3642 case elfcpp::R_SPARC_M44: 3643 Reloc::m44(view, object, psymval, addend); 3644 break; 3645 3646 case elfcpp::R_SPARC_L44: 3647 Reloc::l44(view, object, psymval, addend); 3648 break; 3649 3650 case elfcpp::R_SPARC_TLS_DTPOFF64: 3651 case elfcpp::R_SPARC_UA64: 3652 Reloc::ua64(view, object, psymval, addend); 3653 break; 3654 3655 case elfcpp::R_SPARC_UA16: 3656 Reloc::ua16(view, object, psymval, addend); 3657 break; 3658 3659 case elfcpp::R_SPARC_TLS_GD_HI22: 3660 case elfcpp::R_SPARC_TLS_GD_LO10: 3661 case elfcpp::R_SPARC_TLS_GD_ADD: 3662 case elfcpp::R_SPARC_TLS_GD_CALL: 3663 case elfcpp::R_SPARC_TLS_LDM_HI22: 3664 case elfcpp::R_SPARC_TLS_LDM_LO10: 3665 case elfcpp::R_SPARC_TLS_LDM_ADD: 3666 case elfcpp::R_SPARC_TLS_LDM_CALL: 3667 case elfcpp::R_SPARC_TLS_LDO_HIX22: 3668 case elfcpp::R_SPARC_TLS_LDO_LOX10: 3669 case elfcpp::R_SPARC_TLS_LDO_ADD: 3670 case elfcpp::R_SPARC_TLS_IE_HI22: 3671 case elfcpp::R_SPARC_TLS_IE_LO10: 3672 case elfcpp::R_SPARC_TLS_IE_LD: 3673 case elfcpp::R_SPARC_TLS_IE_LDX: 3674 case elfcpp::R_SPARC_TLS_IE_ADD: 3675 case elfcpp::R_SPARC_TLS_LE_HIX22: 3676 case elfcpp::R_SPARC_TLS_LE_LOX10: 3677 this->relocate_tls(relinfo, target, relnum, rela, 3678 r_type, gsym, psymval, view, 3679 address, view_size); 3680 break; 3681 3682 case elfcpp::R_SPARC_COPY: 3683 case elfcpp::R_SPARC_GLOB_DAT: 3684 case elfcpp::R_SPARC_JMP_SLOT: 3685 case elfcpp::R_SPARC_JMP_IREL: 3686 case elfcpp::R_SPARC_RELATIVE: 3687 case elfcpp::R_SPARC_IRELATIVE: 3688 // These are outstanding tls relocs, which are unexpected when 3689 // linking. 3690 case elfcpp::R_SPARC_TLS_DTPMOD64: 3691 case elfcpp::R_SPARC_TLS_DTPMOD32: 3692 case elfcpp::R_SPARC_TLS_TPOFF64: 3693 case elfcpp::R_SPARC_TLS_TPOFF32: 3694 gold_error_at_location(relinfo, relnum, rela.get_r_offset(), 3695 _("unexpected reloc %u in object file"), 3696 r_type); 3697 break; 3698 3699 default: 3700 gold_error_at_location(relinfo, relnum, rela.get_r_offset(), 3701 _("unsupported reloc %u"), 3702 r_type); 3703 break; 3704 } 3705 3706 return true; 3707} 3708 3709// Perform a TLS relocation. 3710 3711template<int size, bool big_endian> 3712inline void 3713Target_sparc<size, big_endian>::Relocate::relocate_tls( 3714 const Relocate_info<size, big_endian>* relinfo, 3715 Target_sparc<size, big_endian>* target, 3716 size_t relnum, 3717 const elfcpp::Rela<size, big_endian>& rela, 3718 unsigned int r_type, 3719 const Sized_symbol<size>* gsym, 3720 const Symbol_value<size>* psymval, 3721 unsigned char* view, 3722 typename elfcpp::Elf_types<size>::Elf_Addr address, 3723 section_size_type) 3724{ 3725 Output_segment* tls_segment = relinfo->layout->tls_segment(); 3726 typedef Sparc_relocate_functions<size, big_endian> Reloc; 3727 const Sized_relobj_file<size, big_endian>* object = relinfo->object; 3728 typedef typename elfcpp::Swap<32, true>::Valtype Insntype; 3729 3730 const elfcpp::Elf_Xword addend = rela.get_r_addend(); 3731 typename elfcpp::Elf_types<size>::Elf_Addr value = psymval->value(object, 0); 3732 3733 const bool is_final = 3734 (gsym == NULL 3735 ? !parameters->options().shared() 3736 : gsym->final_value_is_known()); 3737 const tls::Tls_optimization optimized_type 3738 = optimize_tls_reloc(is_final, r_type); 3739 3740 switch (r_type) 3741 { 3742 case elfcpp::R_SPARC_TLS_GD_HI22: 3743 case elfcpp::R_SPARC_TLS_GD_LO10: 3744 case elfcpp::R_SPARC_TLS_GD_ADD: 3745 case elfcpp::R_SPARC_TLS_GD_CALL: 3746 if (optimized_type == tls::TLSOPT_TO_LE) 3747 { 3748 Insntype* wv = reinterpret_cast<Insntype*>(view); 3749 Insntype val; 3750 3751 value -= tls_segment->memsz(); 3752 3753 switch (r_type) 3754 { 3755 case elfcpp::R_SPARC_TLS_GD_HI22: 3756 // TLS_GD_HI22 --> TLS_LE_HIX22 3757 Reloc::hix22(view, value, addend); 3758 break; 3759 3760 case elfcpp::R_SPARC_TLS_GD_LO10: 3761 // TLS_GD_LO10 --> TLS_LE_LOX10 3762 Reloc::lox10(view, value, addend); 3763 break; 3764 3765 case elfcpp::R_SPARC_TLS_GD_ADD: 3766 // add %reg1, %reg2, %reg3 --> mov %g7, %reg2, %reg3 3767 val = elfcpp::Swap<32, true>::readval(wv); 3768 val = (val & ~0x7c000) | 0x1c000; 3769 elfcpp::Swap<32, true>::writeval(wv, val); 3770 break; 3771 case elfcpp::R_SPARC_TLS_GD_CALL: 3772 // call __tls_get_addr --> nop 3773 elfcpp::Swap<32, true>::writeval(wv, sparc_nop); 3774 break; 3775 } 3776 break; 3777 } 3778 else 3779 { 3780 unsigned int got_type = (optimized_type == tls::TLSOPT_TO_IE 3781 ? GOT_TYPE_TLS_OFFSET 3782 : GOT_TYPE_TLS_PAIR); 3783 if (gsym != NULL) 3784 { 3785 gold_assert(gsym->has_got_offset(got_type)); 3786 value = gsym->got_offset(got_type); 3787 } 3788 else 3789 { 3790 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); 3791 gold_assert(object->local_has_got_offset(r_sym, got_type)); 3792 value = object->local_got_offset(r_sym, got_type); 3793 } 3794 if (optimized_type == tls::TLSOPT_TO_IE) 3795 { 3796 Insntype* wv = reinterpret_cast<Insntype*>(view); 3797 Insntype val; 3798 3799 switch (r_type) 3800 { 3801 case elfcpp::R_SPARC_TLS_GD_HI22: 3802 // TLS_GD_HI22 --> TLS_IE_HI22 3803 Reloc::hi22(view, value, addend); 3804 break; 3805 3806 case elfcpp::R_SPARC_TLS_GD_LO10: 3807 // TLS_GD_LO10 --> TLS_IE_LO10 3808 Reloc::lo10(view, value, addend); 3809 break; 3810 3811 case elfcpp::R_SPARC_TLS_GD_ADD: 3812 // add %reg1, %reg2, %reg3 --> ld [%reg1 + %reg2], %reg3 3813 val = elfcpp::Swap<32, true>::readval(wv); 3814 3815 if (size == 64) 3816 val |= 0xc0580000; 3817 else 3818 val |= 0xc0000000; 3819 3820 elfcpp::Swap<32, true>::writeval(wv, val); 3821 break; 3822 3823 case elfcpp::R_SPARC_TLS_GD_CALL: 3824 // The compiler can put the TLS_GD_ADD instruction 3825 // into the delay slot of the call. If so, we need 3826 // to transpose the two instructions so that the 3827 // new sequence works properly. 3828 // 3829 // The test we use is if the instruction in the 3830 // delay slot is an add with destination register 3831 // equal to %o0 3832 val = elfcpp::Swap<32, true>::readval(wv + 1); 3833 if ((val & 0x81f80000) == 0x80000000 3834 && ((val >> 25) & 0x1f) == 0x8) 3835 { 3836 if (size == 64) 3837 val |= 0xc0580000; 3838 else 3839 val |= 0xc0000000; 3840 3841 elfcpp::Swap<32, true>::writeval(wv, val); 3842 3843 wv += 1; 3844 this->ignore_gd_add_ = true; 3845 } 3846 else 3847 { 3848 // Even if the delay slot isn't the TLS_GD_ADD 3849 // instruction, we still have to handle the case 3850 // where it sets up %o0 in some other way. 3851 elfcpp::Swap<32, true>::writeval(wv, val); 3852 wv += 1; 3853 this->reloc_adjust_addr_ = view + 4; 3854 } 3855 // call __tls_get_addr --> add %g7, %o0, %o0 3856 elfcpp::Swap<32, true>::writeval(wv, 0x9001c008); 3857 break; 3858 } 3859 break; 3860 } 3861 else if (optimized_type == tls::TLSOPT_NONE) 3862 { 3863 switch (r_type) 3864 { 3865 case elfcpp::R_SPARC_TLS_GD_HI22: 3866 Reloc::hi22(view, value, addend); 3867 break; 3868 case elfcpp::R_SPARC_TLS_GD_LO10: 3869 Reloc::lo10(view, value, addend); 3870 break; 3871 case elfcpp::R_SPARC_TLS_GD_ADD: 3872 break; 3873 case elfcpp::R_SPARC_TLS_GD_CALL: 3874 { 3875 Symbol_value<size> symval; 3876 elfcpp::Elf_Xword value; 3877 Symbol* tsym; 3878 3879 tsym = target->tls_get_addr_sym_; 3880 gold_assert(tsym); 3881 value = (target->plt_section()->address() + 3882 tsym->plt_offset()); 3883 symval.set_output_value(value); 3884 Reloc::wdisp30(view, object, &symval, addend, address); 3885 } 3886 break; 3887 } 3888 break; 3889 } 3890 } 3891 gold_error_at_location(relinfo, relnum, rela.get_r_offset(), 3892 _("unsupported reloc %u"), 3893 r_type); 3894 break; 3895 3896 case elfcpp::R_SPARC_TLS_LDM_HI22: 3897 case elfcpp::R_SPARC_TLS_LDM_LO10: 3898 case elfcpp::R_SPARC_TLS_LDM_ADD: 3899 case elfcpp::R_SPARC_TLS_LDM_CALL: 3900 if (optimized_type == tls::TLSOPT_TO_LE) 3901 { 3902 Insntype* wv = reinterpret_cast<Insntype*>(view); 3903 3904 switch (r_type) 3905 { 3906 case elfcpp::R_SPARC_TLS_LDM_HI22: 3907 case elfcpp::R_SPARC_TLS_LDM_LO10: 3908 case elfcpp::R_SPARC_TLS_LDM_ADD: 3909 elfcpp::Swap<32, true>::writeval(wv, sparc_nop); 3910 break; 3911 3912 case elfcpp::R_SPARC_TLS_LDM_CALL: 3913 elfcpp::Swap<32, true>::writeval(wv, sparc_mov_g0_o0); 3914 break; 3915 } 3916 break; 3917 } 3918 else if (optimized_type == tls::TLSOPT_NONE) 3919 { 3920 // Relocate the field with the offset of the GOT entry for 3921 // the module index. 3922 unsigned int got_offset; 3923 3924 got_offset = target->got_mod_index_entry(NULL, NULL, NULL); 3925 switch (r_type) 3926 { 3927 case elfcpp::R_SPARC_TLS_LDM_HI22: 3928 Reloc::hi22(view, got_offset, addend); 3929 break; 3930 case elfcpp::R_SPARC_TLS_LDM_LO10: 3931 Reloc::lo10(view, got_offset, addend); 3932 break; 3933 case elfcpp::R_SPARC_TLS_LDM_ADD: 3934 break; 3935 case elfcpp::R_SPARC_TLS_LDM_CALL: 3936 { 3937 Symbol_value<size> symval; 3938 elfcpp::Elf_Xword value; 3939 Symbol* tsym; 3940 3941 tsym = target->tls_get_addr_sym_; 3942 gold_assert(tsym); 3943 value = (target->plt_section()->address() + 3944 tsym->plt_offset()); 3945 symval.set_output_value(value); 3946 Reloc::wdisp30(view, object, &symval, addend, address); 3947 } 3948 break; 3949 } 3950 break; 3951 } 3952 gold_error_at_location(relinfo, relnum, rela.get_r_offset(), 3953 _("unsupported reloc %u"), 3954 r_type); 3955 break; 3956 3957 // These relocs can appear in debugging sections, in which case 3958 // we won't see the TLS_LDM relocs. The local_dynamic_type 3959 // field tells us this. 3960 case elfcpp::R_SPARC_TLS_LDO_HIX22: 3961 if (optimized_type == tls::TLSOPT_TO_LE) 3962 { 3963 value -= tls_segment->memsz(); 3964 Reloc::hix22(view, value, addend); 3965 } 3966 else 3967 Reloc::ldo_hix22(view, value, addend); 3968 break; 3969 case elfcpp::R_SPARC_TLS_LDO_LOX10: 3970 if (optimized_type == tls::TLSOPT_TO_LE) 3971 { 3972 value -= tls_segment->memsz(); 3973 Reloc::lox10(view, value, addend); 3974 } 3975 else 3976 Reloc::ldo_lox10(view, value, addend); 3977 break; 3978 case elfcpp::R_SPARC_TLS_LDO_ADD: 3979 if (optimized_type == tls::TLSOPT_TO_LE) 3980 { 3981 Insntype* wv = reinterpret_cast<Insntype*>(view); 3982 Insntype val; 3983 3984 // add %reg1, %reg2, %reg3 --> add %g7, %reg2, %reg3 3985 val = elfcpp::Swap<32, true>::readval(wv); 3986 val = (val & ~0x7c000) | 0x1c000; 3987 elfcpp::Swap<32, true>::writeval(wv, val); 3988 } 3989 break; 3990 3991 // When optimizing IE --> LE, the only relocation that is handled 3992 // differently is R_SPARC_TLS_IE_LD, it is rewritten from 3993 // 'ld{,x} [rs1 + rs2], rd' into 'mov rs2, rd' or simply a NOP is 3994 // rs2 and rd are the same. 3995 case elfcpp::R_SPARC_TLS_IE_LD: 3996 case elfcpp::R_SPARC_TLS_IE_LDX: 3997 if (optimized_type == tls::TLSOPT_TO_LE) 3998 { 3999 Insntype* wv = reinterpret_cast<Insntype*>(view); 4000 Insntype val = elfcpp::Swap<32, true>::readval(wv); 4001 Insntype rs2 = val & 0x1f; 4002 Insntype rd = (val >> 25) & 0x1f; 4003 4004 if (rs2 == rd) 4005 val = sparc_nop; 4006 else 4007 val = sparc_mov | (val & 0x3e00001f); 4008 4009 elfcpp::Swap<32, true>::writeval(wv, val); 4010 } 4011 break; 4012 4013 case elfcpp::R_SPARC_TLS_IE_HI22: 4014 case elfcpp::R_SPARC_TLS_IE_LO10: 4015 if (optimized_type == tls::TLSOPT_TO_LE) 4016 { 4017 value -= tls_segment->memsz(); 4018 switch (r_type) 4019 { 4020 case elfcpp::R_SPARC_TLS_IE_HI22: 4021 // IE_HI22 --> LE_HIX22 4022 Reloc::hix22(view, value, addend); 4023 break; 4024 case elfcpp::R_SPARC_TLS_IE_LO10: 4025 // IE_LO10 --> LE_LOX10 4026 Reloc::lox10(view, value, addend); 4027 break; 4028 } 4029 break; 4030 } 4031 else if (optimized_type == tls::TLSOPT_NONE) 4032 { 4033 // Relocate the field with the offset of the GOT entry for 4034 // the tp-relative offset of the symbol. 4035 if (gsym != NULL) 4036 { 4037 gold_assert(gsym->has_got_offset(GOT_TYPE_TLS_OFFSET)); 4038 value = gsym->got_offset(GOT_TYPE_TLS_OFFSET); 4039 } 4040 else 4041 { 4042 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); 4043 gold_assert(object->local_has_got_offset(r_sym, 4044 GOT_TYPE_TLS_OFFSET)); 4045 value = object->local_got_offset(r_sym, 4046 GOT_TYPE_TLS_OFFSET); 4047 } 4048 switch (r_type) 4049 { 4050 case elfcpp::R_SPARC_TLS_IE_HI22: 4051 Reloc::hi22(view, value, addend); 4052 break; 4053 case elfcpp::R_SPARC_TLS_IE_LO10: 4054 Reloc::lo10(view, value, addend); 4055 break; 4056 } 4057 break; 4058 } 4059 gold_error_at_location(relinfo, relnum, rela.get_r_offset(), 4060 _("unsupported reloc %u"), 4061 r_type); 4062 break; 4063 4064 case elfcpp::R_SPARC_TLS_IE_ADD: 4065 // This seems to be mainly so that we can find the addition 4066 // instruction if there is one. There doesn't seem to be any 4067 // actual relocation to apply. 4068 break; 4069 4070 case elfcpp::R_SPARC_TLS_LE_HIX22: 4071 // If we're creating a shared library, a dynamic relocation will 4072 // have been created for this location, so do not apply it now. 4073 if (!parameters->options().shared()) 4074 { 4075 value -= tls_segment->memsz(); 4076 Reloc::hix22(view, value, addend); 4077 } 4078 break; 4079 4080 case elfcpp::R_SPARC_TLS_LE_LOX10: 4081 // If we're creating a shared library, a dynamic relocation will 4082 // have been created for this location, so do not apply it now. 4083 if (!parameters->options().shared()) 4084 { 4085 value -= tls_segment->memsz(); 4086 Reloc::lox10(view, value, addend); 4087 } 4088 break; 4089 } 4090} 4091 4092// Relax a call instruction. 4093 4094template<int size, bool big_endian> 4095inline void 4096Target_sparc<size, big_endian>::Relocate::relax_call( 4097 Target_sparc<size, big_endian>* target, 4098 unsigned char* view, 4099 const elfcpp::Rela<size, big_endian>& rela, 4100 section_size_type view_size) 4101{ 4102 typedef typename elfcpp::Swap<32, true>::Valtype Insntype; 4103 Insntype *wv = reinterpret_cast<Insntype*>(view); 4104 Insntype call_insn, delay_insn, set_insn; 4105 uint32_t op3, reg, off; 4106 4107 // This code tries to relax call instructions that meet 4108 // certain criteria. 4109 // 4110 // The first criteria is that the call must be such that the return 4111 // address which the call writes into %o7 is unused. Two sequences 4112 // meet this criteria, and are used to implement tail calls. 4113 // 4114 // Leaf function tail call: 4115 // 4116 // or %o7, %g0, %ANY_REG 4117 // call FUNC 4118 // or %ANY_REG, %g0, %o7 4119 // 4120 // Non-leaf function tail call: 4121 // 4122 // call FUNC 4123 // restore 4124 // 4125 // The second criteria is that the call destination is close. If 4126 // the displacement can fit in a signed 22-bit immediate field of a 4127 // pre-V9 branch, we can do it. If we are generating a 64-bit 4128 // object or a 32-bit object with ELF machine type EF_SPARC32PLUS, 4129 // and the displacement fits in a signed 19-bit immediate field, 4130 // then we can use a V9 branch. 4131 4132 // Make sure the delay instruction can be safely accessed. 4133 if (rela.get_r_offset() + 8 > view_size) 4134 return; 4135 4136 call_insn = elfcpp::Swap<32, true>::readval(wv); 4137 delay_insn = elfcpp::Swap<32, true>::readval(wv + 1); 4138 4139 // Make sure it is really a call instruction. 4140 if (((call_insn >> 30) & 0x3) != 1) 4141 return; 4142 4143 if (((delay_insn >> 30) & 0x3) != 2) 4144 return; 4145 4146 // Accept only a restore or an integer arithmetic operation whose 4147 // sole side effect is to write the %o7 register (and perhaps set 4148 // the condition codes, which are considered clobbered across 4149 // function calls). 4150 // 4151 // For example, we don't want to match a tagged addition or 4152 // subtraction. We also don't want to match something like a 4153 // divide. 4154 // 4155 // Specifically we accept add{,cc}, and{,cc}, or{,cc}, 4156 // xor{,cc}, sub{,cc}, andn{,cc}, orn{,cc}, and xnor{,cc}. 4157 4158 op3 = (delay_insn >> 19) & 0x3f; 4159 reg = (delay_insn >> 25) & 0x1f; 4160 if (op3 != 0x3d 4161 && ((op3 & 0x28) != 0 || reg != 15)) 4162 return; 4163 4164 // For non-restore instructions, make sure %o7 isn't 4165 // an input. 4166 if (op3 != 0x3d) 4167 { 4168 // First check RS1 4169 reg = (delay_insn >> 14) & 0x1f; 4170 if (reg == 15) 4171 return; 4172 4173 // And if non-immediate, check RS2 4174 if (((delay_insn >> 13) & 1) == 0) 4175 { 4176 reg = (delay_insn & 0x1f); 4177 if (reg == 15) 4178 return; 4179 } 4180 } 4181 4182 // Now check the branch distance. We are called after the 4183 // call has been relocated, so we just have to peek at the 4184 // offset contained in the instruction. 4185 off = call_insn & 0x3fffffff; 4186 if ((off & 0x3fe00000) != 0 4187 && (off & 0x3fe00000) != 0x3fe00000) 4188 return; 4189 4190 if ((size == 64 || target->elf_machine_ == elfcpp::EM_SPARC32PLUS) 4191 && ((off & 0x3c0000) == 0 4192 || (off & 0x3c0000) == 0x3c0000)) 4193 { 4194 // ba,pt %xcc, FUNC 4195 call_insn = 0x10680000 | (off & 0x07ffff); 4196 } 4197 else 4198 { 4199 // ba FUNC 4200 call_insn = 0x10800000 | (off & 0x3fffff); 4201 } 4202 elfcpp::Swap<32, true>::writeval(wv, call_insn); 4203 4204 // See if we can NOP out the delay slot instruction. We peek 4205 // at the instruction before the call to make sure we're dealing 4206 // with exactly the: 4207 // 4208 // or %o7, %g0, %ANY_REG 4209 // call 4210 // or %ANY_REG, %g0, %o7 4211 // 4212 // case. Otherwise this might be a tricky piece of hand written 4213 // assembler calculating %o7 in some non-trivial way, and therefore 4214 // we can't be sure that NOP'ing out the delay slot is safe. 4215 if (op3 == 0x02 4216 && rela.get_r_offset() >= 4) 4217 { 4218 if ((delay_insn & ~(0x1f << 14)) != 0x9e100000) 4219 return; 4220 4221 set_insn = elfcpp::Swap<32, true>::readval(wv - 1); 4222 if ((set_insn & ~(0x1f << 25)) != 0x8013c000) 4223 return; 4224 4225 reg = (set_insn >> 25) & 0x1f; 4226 if (reg == 0 || reg == 15) 4227 return; 4228 if (reg != ((delay_insn >> 14) & 0x1f)) 4229 return; 4230 4231 // All tests pass, nop it out. 4232 elfcpp::Swap<32, true>::writeval(wv + 1, sparc_nop); 4233 } 4234} 4235 4236// Relocate section data. 4237 4238template<int size, bool big_endian> 4239void 4240Target_sparc<size, big_endian>::relocate_section( 4241 const Relocate_info<size, big_endian>* relinfo, 4242 unsigned int sh_type, 4243 const unsigned char* prelocs, 4244 size_t reloc_count, 4245 Output_section* output_section, 4246 bool needs_special_offset_handling, 4247 unsigned char* view, 4248 typename elfcpp::Elf_types<size>::Elf_Addr address, 4249 section_size_type view_size, 4250 const Reloc_symbol_changes* reloc_symbol_changes) 4251{ 4252 typedef Target_sparc<size, big_endian> Sparc; 4253 typedef typename Target_sparc<size, big_endian>::Relocate Sparc_relocate; 4254 typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> 4255 Classify_reloc; 4256 4257 gold_assert(sh_type == elfcpp::SHT_RELA); 4258 4259 gold::relocate_section<size, big_endian, Sparc, Sparc_relocate, 4260 gold::Default_comdat_behavior, Classify_reloc>( 4261 relinfo, 4262 this, 4263 prelocs, 4264 reloc_count, 4265 output_section, 4266 needs_special_offset_handling, 4267 view, 4268 address, 4269 view_size, 4270 reloc_symbol_changes); 4271} 4272 4273// Scan the relocs during a relocatable link. 4274 4275template<int size, bool big_endian> 4276void 4277Target_sparc<size, big_endian>::scan_relocatable_relocs( 4278 Symbol_table* symtab, 4279 Layout* layout, 4280 Sized_relobj_file<size, big_endian>* object, 4281 unsigned int data_shndx, 4282 unsigned int sh_type, 4283 const unsigned char* prelocs, 4284 size_t reloc_count, 4285 Output_section* output_section, 4286 bool needs_special_offset_handling, 4287 size_t local_symbol_count, 4288 const unsigned char* plocal_symbols, 4289 Relocatable_relocs* rr) 4290{ 4291 typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> 4292 Classify_reloc; 4293 typedef gold::Default_scan_relocatable_relocs<Classify_reloc> 4294 Scan_relocatable_relocs; 4295 4296 gold_assert(sh_type == elfcpp::SHT_RELA); 4297 4298 gold::scan_relocatable_relocs<size, big_endian, Scan_relocatable_relocs>( 4299 symtab, 4300 layout, 4301 object, 4302 data_shndx, 4303 prelocs, 4304 reloc_count, 4305 output_section, 4306 needs_special_offset_handling, 4307 local_symbol_count, 4308 plocal_symbols, 4309 rr); 4310} 4311 4312// Scan the relocs for --emit-relocs. 4313 4314template<int size, bool big_endian> 4315void 4316Target_sparc<size, big_endian>::emit_relocs_scan( 4317 Symbol_table* symtab, 4318 Layout* layout, 4319 Sized_relobj_file<size, big_endian>* object, 4320 unsigned int data_shndx, 4321 unsigned int sh_type, 4322 const unsigned char* prelocs, 4323 size_t reloc_count, 4324 Output_section* output_section, 4325 bool needs_special_offset_handling, 4326 size_t local_symbol_count, 4327 const unsigned char* plocal_syms, 4328 Relocatable_relocs* rr) 4329{ 4330 typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> 4331 Classify_reloc; 4332 typedef gold::Default_emit_relocs_strategy<Classify_reloc> 4333 Emit_relocs_strategy; 4334 4335 gold_assert(sh_type == elfcpp::SHT_RELA); 4336 4337 gold::scan_relocatable_relocs<size, big_endian, Emit_relocs_strategy>( 4338 symtab, 4339 layout, 4340 object, 4341 data_shndx, 4342 prelocs, 4343 reloc_count, 4344 output_section, 4345 needs_special_offset_handling, 4346 local_symbol_count, 4347 plocal_syms, 4348 rr); 4349} 4350 4351// Emit relocations for a section. 4352 4353template<int size, bool big_endian> 4354void 4355Target_sparc<size, big_endian>::relocate_relocs( 4356 const Relocate_info<size, big_endian>* relinfo, 4357 unsigned int sh_type, 4358 const unsigned char* prelocs, 4359 size_t reloc_count, 4360 Output_section* output_section, 4361 typename elfcpp::Elf_types<size>::Elf_Off offset_in_output_section, 4362 unsigned char* view, 4363 typename elfcpp::Elf_types<size>::Elf_Addr view_address, 4364 section_size_type view_size, 4365 unsigned char* reloc_view, 4366 section_size_type reloc_view_size) 4367{ 4368 typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> 4369 Classify_reloc; 4370 4371 gold_assert(sh_type == elfcpp::SHT_RELA); 4372 4373 gold::relocate_relocs<size, big_endian, Classify_reloc>( 4374 relinfo, 4375 prelocs, 4376 reloc_count, 4377 output_section, 4378 offset_in_output_section, 4379 view, 4380 view_address, 4381 view_size, 4382 reloc_view, 4383 reloc_view_size); 4384} 4385 4386// Return the value to use for a dynamic which requires special 4387// treatment. This is how we support equality comparisons of function 4388// pointers across shared library boundaries, as described in the 4389// processor specific ABI supplement. 4390 4391template<int size, bool big_endian> 4392uint64_t 4393Target_sparc<size, big_endian>::do_dynsym_value(const Symbol* gsym) const 4394{ 4395 gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset()); 4396 return this->plt_section()->address() + gsym->plt_offset(); 4397} 4398 4399// do_make_elf_object to override the same function in the base class. 4400// We need to use a target-specific sub-class of 4401// Sized_relobj_file<size, big_endian> to process SPARC specific bits 4402// of the ELF headers. Hence we need to have our own ELF object creation. 4403 4404template<int size, bool big_endian> 4405Object* 4406Target_sparc<size, big_endian>::do_make_elf_object( 4407 const std::string& name, 4408 Input_file* input_file, 4409 off_t offset, const elfcpp::Ehdr<size, big_endian>& ehdr) 4410{ 4411 elfcpp::Elf_Half machine = ehdr.get_e_machine(); 4412 elfcpp::Elf_Word flags = ehdr.get_e_flags(); 4413 elfcpp::Elf_Word omm, mm; 4414 4415 switch (machine) 4416 { 4417 case elfcpp::EM_SPARC32PLUS: 4418 this->elf_machine_ = elfcpp::EM_SPARC32PLUS; 4419 break; 4420 4421 case elfcpp::EM_SPARC: 4422 case elfcpp::EM_SPARCV9: 4423 break; 4424 4425 default: 4426 break; 4427 } 4428 4429 if (!this->elf_flags_set_) 4430 { 4431 this->elf_flags_ = flags; 4432 this->elf_flags_set_ = true; 4433 } 4434 else 4435 { 4436 // Accumulate cpu feature bits. 4437 this->elf_flags_ |= (flags & (elfcpp::EF_SPARC_32PLUS 4438 | elfcpp::EF_SPARC_SUN_US1 4439 | elfcpp::EF_SPARC_HAL_R1 4440 | elfcpp::EF_SPARC_SUN_US3)); 4441 4442 // Bump the memory model setting to the most restrictive 4443 // one we encounter. 4444 omm = (this->elf_flags_ & elfcpp::EF_SPARCV9_MM); 4445 mm = (flags & elfcpp::EF_SPARCV9_MM); 4446 if (omm != mm) 4447 { 4448 if (mm == elfcpp::EF_SPARCV9_TSO) 4449 { 4450 this->elf_flags_ &= ~elfcpp::EF_SPARCV9_MM; 4451 this->elf_flags_ |= elfcpp::EF_SPARCV9_TSO; 4452 } 4453 else if (mm == elfcpp::EF_SPARCV9_PSO 4454 && omm == elfcpp::EF_SPARCV9_RMO) 4455 { 4456 this->elf_flags_ &= ~elfcpp::EF_SPARCV9_MM; 4457 this->elf_flags_ |= elfcpp::EF_SPARCV9_PSO; 4458 } 4459 } 4460 } 4461 4462 // Validate that the little-endian flag matches how we've 4463 // been instantiated. 4464 if (!(flags & elfcpp::EF_SPARC_LEDATA) != big_endian) 4465 { 4466 if (big_endian) 4467 gold_error(_("%s: little endian elf flag set on BE object"), 4468 name.c_str()); 4469 else 4470 gold_error(_("%s: little endian elf flag clear on LE object"), 4471 name.c_str()); 4472 } 4473 4474 return Target::do_make_elf_object(name, input_file, offset, ehdr); 4475} 4476 4477// Adjust ELF file header. 4478 4479template<int size, bool big_endian> 4480void 4481Target_sparc<size, big_endian>::do_adjust_elf_header( 4482 unsigned char* view, 4483 int len) 4484{ 4485 elfcpp::Ehdr_write<size, big_endian> oehdr(view); 4486 4487 oehdr.put_e_machine(this->elf_machine_); 4488 oehdr.put_e_flags(this->elf_flags_); 4489 4490 Sized_target<size, big_endian>::do_adjust_elf_header(view, len); 4491} 4492 4493// The selector for sparc object files. 4494 4495template<int size, bool big_endian> 4496class Target_selector_sparc : public Target_selector 4497{ 4498public: 4499 Target_selector_sparc() 4500 : Target_selector(elfcpp::EM_NONE, size, big_endian, 4501 (size == 64 ? "elf64-sparc" : "elf32-sparc"), 4502 (size == 64 ? "elf64_sparc" : "elf32_sparc")) 4503 { } 4504 4505 virtual Target* 4506 do_recognize(Input_file*, off_t, int machine, int, int) 4507 { 4508 switch (size) 4509 { 4510 case 64: 4511 if (machine != elfcpp::EM_SPARCV9) 4512 return NULL; 4513 break; 4514 4515 case 32: 4516 if (machine != elfcpp::EM_SPARC 4517 && machine != elfcpp::EM_SPARC32PLUS) 4518 return NULL; 4519 break; 4520 4521 default: 4522 return NULL; 4523 } 4524 4525 return this->instantiate_target(); 4526 } 4527 4528 virtual Target* 4529 do_instantiate_target() 4530 { return new Target_sparc<size, big_endian>(); } 4531}; 4532 4533Target_selector_sparc<32, true> target_selector_sparc32; 4534Target_selector_sparc<64, true> target_selector_sparc64; 4535 4536} // End anonymous namespace. 4537