1 // powerpc.cc -- powerpc target support for gold.
3 // Copyright (C) 2008-2018 Free Software Foundation, Inc.
4 // Written by David S. Miller <davem@davemloft.net>
5 // and David Edelsohn <edelsohn@gnu.org>
7 // This file is part of gold.
9 // This program is free software; you can redistribute it and/or modify
10 // it under the terms of the GNU General Public License as published by
11 // the Free Software Foundation; either version 3 of the License, or
12 // (at your option) any later version.
14 // This program is distributed in the hope that it will be useful,
15 // but WITHOUT ANY WARRANTY; without even the implied warranty of
16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 // GNU General Public License for more details.
19 // You should have received a copy of the GNU General Public License
20 // along with this program; if not, write to the Free Software
21 // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22 // MA 02110-1301, USA.
30 #include "parameters.h"
37 #include "copy-relocs.h"
39 #include "target-reloc.h"
40 #include "target-select.h"
50 template<int size, bool big_endian>
51 class Output_data_plt_powerpc;
53 template<int size, bool big_endian>
54 class Output_data_brlt_powerpc;
56 template<int size, bool big_endian>
57 class Output_data_got_powerpc;
59 template<int size, bool big_endian>
60 class Output_data_glink;
62 template<int size, bool big_endian>
65 template<int size, bool big_endian>
66 class Output_data_save_res;
68 template<int size, bool big_endian>
71 struct Stub_table_owner
74 : output_section(NULL), owner(NULL)
77 Output_section* output_section;
78 const Output_section::Input_section* owner;
82 is_branch_reloc(unsigned int r_type);
84 // Counter incremented on every Powerpc_relobj constructed.
85 static uint32_t object_id = 0;
87 template<int size, bool big_endian>
88 class Powerpc_relobj : public Sized_relobj_file<size, big_endian>
91 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
92 typedef Unordered_set<Section_id, Section_id_hash> Section_refs;
93 typedef Unordered_map<Address, Section_refs> Access_from;
95 Powerpc_relobj(const std::string& name, Input_file* input_file, off_t offset,
96 const typename elfcpp::Ehdr<size, big_endian>& ehdr)
97 : Sized_relobj_file<size, big_endian>(name, input_file, offset, ehdr),
98 uniq_(object_id++), special_(0), relatoc_(0), toc_(0),
99 has_small_toc_reloc_(false), opd_valid_(false),
100 e_flags_(ehdr.get_e_flags()), no_toc_opt_(), opd_ent_(),
101 access_from_map_(), has14_(), stub_table_index_(), st_other_()
103 this->set_abiversion(0);
109 // Read the symbols then set up st_other vector.
111 do_read_symbols(Read_symbols_data*);
113 // Arrange to always relocate .toc first.
115 do_relocate_sections(
116 const Symbol_table* symtab, const Layout* layout,
117 const unsigned char* pshdrs, Output_file* of,
118 typename Sized_relobj_file<size, big_endian>::Views* pviews);
120 // The .toc section index.
127 // Mark .toc entry at OFF as not optimizable.
129 set_no_toc_opt(Address off)
131 if (this->no_toc_opt_.empty())
132 this->no_toc_opt_.resize(this->section_size(this->toc_shndx())
135 if (off < this->no_toc_opt_.size())
136 this->no_toc_opt_[off] = true;
139 // Mark the entire .toc as not optimizable.
143 this->no_toc_opt_.resize(1);
144 this->no_toc_opt_[0] = true;
147 // Return true if code using the .toc entry at OFF should not be edited.
149 no_toc_opt(Address off) const
151 if (this->no_toc_opt_.empty())
154 if (off >= this->no_toc_opt_.size())
156 return this->no_toc_opt_[off];
159 // The .got2 section shndx.
164 return this->special_;
169 // The .opd section shndx.
176 return this->special_;
179 // Init OPD entry arrays.
181 init_opd(size_t opd_size)
183 size_t count = this->opd_ent_ndx(opd_size);
184 this->opd_ent_.resize(count);
187 // Return section and offset of function entry for .opd + R_OFF.
189 get_opd_ent(Address r_off, Address* value = NULL) const
191 size_t ndx = this->opd_ent_ndx(r_off);
192 gold_assert(ndx < this->opd_ent_.size());
193 gold_assert(this->opd_ent_[ndx].shndx != 0);
195 *value = this->opd_ent_[ndx].off;
196 return this->opd_ent_[ndx].shndx;
199 // Set section and offset of function entry for .opd + R_OFF.
201 set_opd_ent(Address r_off, unsigned int shndx, Address value)
203 size_t ndx = this->opd_ent_ndx(r_off);
204 gold_assert(ndx < this->opd_ent_.size());
205 this->opd_ent_[ndx].shndx = shndx;
206 this->opd_ent_[ndx].off = value;
209 // Return discard flag for .opd + R_OFF.
211 get_opd_discard(Address r_off) const
213 size_t ndx = this->opd_ent_ndx(r_off);
214 gold_assert(ndx < this->opd_ent_.size());
215 return this->opd_ent_[ndx].discard;
218 // Set discard flag for .opd + R_OFF.
220 set_opd_discard(Address r_off)
222 size_t ndx = this->opd_ent_ndx(r_off);
223 gold_assert(ndx < this->opd_ent_.size());
224 this->opd_ent_[ndx].discard = true;
229 { return this->opd_valid_; }
233 { this->opd_valid_ = true; }
235 // Examine .rela.opd to build info about function entry points.
237 scan_opd_relocs(size_t reloc_count,
238 const unsigned char* prelocs,
239 const unsigned char* plocal_syms);
241 // Returns true if a code sequence loading a TOC entry can be
242 // converted into code calculating a TOC pointer relative offset.
244 make_toc_relative(Target_powerpc<size, big_endian>* target,
247 // Perform the Sized_relobj_file method, then set up opd info from
250 do_read_relocs(Read_relocs_data*);
253 do_find_special_sections(Read_symbols_data* sd);
255 // Adjust this local symbol value. Return false if the symbol
256 // should be discarded from the output file.
258 do_adjust_local_symbol(Symbol_value<size>* lv) const
260 if (size == 64 && this->opd_shndx() != 0)
263 if (lv->input_shndx(&is_ordinary) != this->opd_shndx())
265 if (this->get_opd_discard(lv->input_value()))
273 { return &this->access_from_map_; }
275 // Add a reference from SRC_OBJ, SRC_INDX to this object's .opd
276 // section at DST_OFF.
278 add_reference(Relobj* src_obj,
279 unsigned int src_indx,
280 typename elfcpp::Elf_types<size>::Elf_Addr dst_off)
282 Section_id src_id(src_obj, src_indx);
283 this->access_from_map_[dst_off].insert(src_id);
286 // Add a reference to the code section specified by the .opd entry
289 add_gc_mark(typename elfcpp::Elf_types<size>::Elf_Addr dst_off)
291 size_t ndx = this->opd_ent_ndx(dst_off);
292 if (ndx >= this->opd_ent_.size())
293 this->opd_ent_.resize(ndx + 1);
294 this->opd_ent_[ndx].gc_mark = true;
298 process_gc_mark(Symbol_table* symtab)
300 for (size_t i = 0; i < this->opd_ent_.size(); i++)
301 if (this->opd_ent_[i].gc_mark)
303 unsigned int shndx = this->opd_ent_[i].shndx;
304 symtab->gc()->worklist().push_back(Section_id(this, shndx));
308 // Return offset in output GOT section that this object will use
309 // as a TOC pointer. Won't be just a constant with multi-toc support.
311 toc_base_offset() const
315 set_has_small_toc_reloc()
316 { has_small_toc_reloc_ = true; }
319 has_small_toc_reloc() const
320 { return has_small_toc_reloc_; }
323 set_has_14bit_branch(unsigned int shndx)
325 if (shndx >= this->has14_.size())
326 this->has14_.resize(shndx + 1);
327 this->has14_[shndx] = true;
331 has_14bit_branch(unsigned int shndx) const
332 { return shndx < this->has14_.size() && this->has14_[shndx]; }
335 set_stub_table(unsigned int shndx, unsigned int stub_index)
337 if (shndx >= this->stub_table_index_.size())
338 this->stub_table_index_.resize(shndx + 1, -1);
339 this->stub_table_index_[shndx] = stub_index;
342 Stub_table<size, big_endian>*
343 stub_table(unsigned int shndx)
345 if (shndx < this->stub_table_index_.size())
347 Target_powerpc<size, big_endian>* target
348 = static_cast<Target_powerpc<size, big_endian>*>(
349 parameters->sized_target<size, big_endian>());
350 unsigned int indx = this->stub_table_index_[shndx];
351 if (indx < target->stub_tables().size())
352 return target->stub_tables()[indx];
360 this->stub_table_index_.clear();
365 { return this->uniq_; }
369 { return this->e_flags_ & elfcpp::EF_PPC64_ABI; }
371 // Set ABI version for input and output
373 set_abiversion(int ver);
376 st_other (unsigned int symndx) const
378 return this->st_other_[symndx];
382 ppc64_local_entry_offset(const Symbol* sym) const
383 { return elfcpp::ppc64_decode_local_entry(sym->nonvis() >> 3); }
386 ppc64_local_entry_offset(unsigned int symndx) const
387 { return elfcpp::ppc64_decode_local_entry(this->st_other_[symndx] >> 5); }
398 // Return index into opd_ent_ array for .opd entry at OFF.
399 // .opd entries are 24 bytes long, but they can be spaced 16 bytes
400 // apart when the language doesn't use the last 8-byte word, the
401 // environment pointer. Thus dividing the entry section offset by
402 // 16 will give an index into opd_ent_ that works for either layout
403 // of .opd. (It leaves some elements of the vector unused when .opd
404 // entries are spaced 24 bytes apart, but we don't know the spacing
405 // until relocations are processed, and in any case it is possible
406 // for an object to have some entries spaced 16 bytes apart and
407 // others 24 bytes apart.)
409 opd_ent_ndx(size_t off) const
412 // Per object unique identifier
415 // For 32-bit the .got2 section shdnx, for 64-bit the .opd section shndx.
416 unsigned int special_;
418 // For 64-bit the .rela.toc and .toc section shdnx.
419 unsigned int relatoc_;
422 // For 64-bit, whether this object uses small model relocs to access
424 bool has_small_toc_reloc_;
426 // Set at the start of gc_process_relocs, when we know opd_ent_
427 // vector is valid. The flag could be made atomic and set in
428 // do_read_relocs with memory_order_release and then tested with
429 // memory_order_acquire, potentially resulting in fewer entries in
434 elfcpp::Elf_Word e_flags_;
436 // For 64-bit, an array with one entry per 64-bit word in the .toc
437 // section, set if accesses using that word cannot be optimised.
438 std::vector<bool> no_toc_opt_;
440 // The first 8-byte word of an OPD entry gives the address of the
441 // entry point of the function. Relocatable object files have a
442 // relocation on this word. The following vector records the
443 // section and offset specified by these relocations.
444 std::vector<Opd_ent> opd_ent_;
446 // References made to this object's .opd section when running
447 // gc_process_relocs for another object, before the opd_ent_ vector
448 // is valid for this object.
449 Access_from access_from_map_;
451 // Whether input section has a 14-bit branch reloc.
452 std::vector<bool> has14_;
454 // The stub table to use for a given input section.
455 std::vector<unsigned int> stub_table_index_;
457 // ELF st_other field for local symbols.
458 std::vector<unsigned char> st_other_;
461 template<int size, bool big_endian>
462 class Powerpc_dynobj : public Sized_dynobj<size, big_endian>
465 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
467 Powerpc_dynobj(const std::string& name, Input_file* input_file, off_t offset,
468 const typename elfcpp::Ehdr<size, big_endian>& ehdr)
469 : Sized_dynobj<size, big_endian>(name, input_file, offset, ehdr),
470 opd_shndx_(0), e_flags_(ehdr.get_e_flags()), opd_ent_()
472 this->set_abiversion(0);
478 // Call Sized_dynobj::do_read_symbols to read the symbols then
479 // read .opd from a dynamic object, filling in opd_ent_ vector,
481 do_read_symbols(Read_symbols_data*);
483 // The .opd section shndx.
487 return this->opd_shndx_;
490 // The .opd section address.
494 return this->opd_address_;
497 // Init OPD entry arrays.
499 init_opd(size_t opd_size)
501 size_t count = this->opd_ent_ndx(opd_size);
502 this->opd_ent_.resize(count);
505 // Return section and offset of function entry for .opd + R_OFF.
507 get_opd_ent(Address r_off, Address* value = NULL) const
509 size_t ndx = this->opd_ent_ndx(r_off);
510 gold_assert(ndx < this->opd_ent_.size());
511 gold_assert(this->opd_ent_[ndx].shndx != 0);
513 *value = this->opd_ent_[ndx].off;
514 return this->opd_ent_[ndx].shndx;
517 // Set section and offset of function entry for .opd + R_OFF.
519 set_opd_ent(Address r_off, unsigned int shndx, Address value)
521 size_t ndx = this->opd_ent_ndx(r_off);
522 gold_assert(ndx < this->opd_ent_.size());
523 this->opd_ent_[ndx].shndx = shndx;
524 this->opd_ent_[ndx].off = value;
529 { return this->e_flags_ & elfcpp::EF_PPC64_ABI; }
531 // Set ABI version for input and output.
533 set_abiversion(int ver);
536 // Used to specify extent of executable sections.
539 Sec_info(Address start_, Address len_, unsigned int shndx_)
540 : start(start_), len(len_), shndx(shndx_)
544 operator<(const Sec_info& that) const
545 { return this->start < that.start; }
558 // Return index into opd_ent_ array for .opd entry at OFF.
560 opd_ent_ndx(size_t off) const
563 // For 64-bit the .opd section shndx and address.
564 unsigned int opd_shndx_;
565 Address opd_address_;
568 elfcpp::Elf_Word e_flags_;
570 // The first 8-byte word of an OPD entry gives the address of the
571 // entry point of the function. Records the section and offset
572 // corresponding to the address. Note that in dynamic objects,
573 // offset is *not* relative to the section.
574 std::vector<Opd_ent> opd_ent_;
577 // Powerpc_copy_relocs class. Needed to peek at dynamic relocs the
578 // base class will emit.
580 template<int sh_type, int size, bool big_endian>
581 class Powerpc_copy_relocs : public Copy_relocs<sh_type, size, big_endian>
584 Powerpc_copy_relocs()
585 : Copy_relocs<sh_type, size, big_endian>(elfcpp::R_POWERPC_COPY)
588 // Emit any saved relocations which turn out to be needed. This is
589 // called after all the relocs have been scanned.
591 emit(Output_data_reloc<sh_type, true, size, big_endian>*);
594 template<int size, bool big_endian>
595 class Target_powerpc : public Sized_target<size, big_endian>
599 Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Reloc_section;
600 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
601 typedef typename elfcpp::Elf_types<size>::Elf_Swxword Signed_address;
602 typedef Unordered_set<Symbol_location, Symbol_location_hash> Tocsave_loc;
603 static const Address invalid_address = static_cast<Address>(0) - 1;
604 // Offset of tp and dtp pointers from start of TLS block.
605 static const Address tp_offset = 0x7000;
606 static const Address dtp_offset = 0x8000;
609 : Sized_target<size, big_endian>(&powerpc_info),
610 got_(NULL), plt_(NULL), iplt_(NULL), brlt_section_(NULL),
611 glink_(NULL), rela_dyn_(NULL), copy_relocs_(),
612 tlsld_got_offset_(-1U),
613 stub_tables_(), branch_lookup_table_(), branch_info_(), tocsave_loc_(),
614 plt_thread_safe_(false), plt_localentry0_(false),
615 plt_localentry0_init_(false), has_localentry0_(false),
616 has_tls_get_addr_opt_(false),
617 relax_failed_(false), relax_fail_count_(0),
618 stub_group_size_(0), savres_section_(0),
619 tls_get_addr_(NULL), tls_get_addr_opt_(NULL)
623 // Process the relocations to determine unreferenced sections for
624 // garbage collection.
626 gc_process_relocs(Symbol_table* symtab,
628 Sized_relobj_file<size, big_endian>* object,
629 unsigned int data_shndx,
630 unsigned int sh_type,
631 const unsigned char* prelocs,
633 Output_section* output_section,
634 bool needs_special_offset_handling,
635 size_t local_symbol_count,
636 const unsigned char* plocal_symbols);
638 // Scan the relocations to look for symbol adjustments.
640 scan_relocs(Symbol_table* symtab,
642 Sized_relobj_file<size, big_endian>* object,
643 unsigned int data_shndx,
644 unsigned int sh_type,
645 const unsigned char* prelocs,
647 Output_section* output_section,
648 bool needs_special_offset_handling,
649 size_t local_symbol_count,
650 const unsigned char* plocal_symbols);
652 // Map input .toc section to output .got section.
654 do_output_section_name(const Relobj*, const char* name, size_t* plen) const
656 if (size == 64 && strcmp(name, ".toc") == 0)
664 // Provide linker defined save/restore functions.
666 define_save_restore_funcs(Layout*, Symbol_table*);
668 // No stubs unless a final link.
671 { return !parameters->options().relocatable(); }
674 do_relax(int, const Input_objects*, Symbol_table*, Layout*, const Task*);
677 do_plt_fde_location(const Output_data*, unsigned char*,
678 uint64_t*, off_t*) const;
680 // Stash info about branches, for stub generation.
682 push_branch(Powerpc_relobj<size, big_endian>* ppc_object,
683 unsigned int data_shndx, Address r_offset,
684 unsigned int r_type, unsigned int r_sym, Address addend)
686 Branch_info info(ppc_object, data_shndx, r_offset, r_type, r_sym, addend);
687 this->branch_info_.push_back(info);
688 if (r_type == elfcpp::R_POWERPC_REL14
689 || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN
690 || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN)
691 ppc_object->set_has_14bit_branch(data_shndx);
694 // Return whether the last branch is a plt call, and if so, mark the
695 // branch as having an R_PPC64_TOCSAVE.
697 mark_pltcall(Powerpc_relobj<size, big_endian>* ppc_object,
698 unsigned int data_shndx, Address r_offset, Symbol_table* symtab)
701 && !this->branch_info_.empty()
702 && this->branch_info_.back().mark_pltcall(ppc_object, data_shndx,
703 r_offset, this, symtab));
706 // Say the given location, that of a nop in a function prologue with
707 // an R_PPC64_TOCSAVE reloc, will be used to save r2.
708 // R_PPC64_TOCSAVE relocs on nops following calls point at this nop.
710 add_tocsave(Powerpc_relobj<size, big_endian>* ppc_object,
711 unsigned int shndx, Address offset)
714 loc.object = ppc_object;
717 this->tocsave_loc_.insert(loc);
724 return this->tocsave_loc_;
728 do_define_standard_symbols(Symbol_table*, Layout*);
730 // Finalize the sections.
732 do_finalize_sections(Layout*, const Input_objects*, Symbol_table*);
734 // Return the value to use for a dynamic which requires special
737 do_dynsym_value(const Symbol*) const;
739 // Return the PLT address to use for a local symbol.
741 do_plt_address_for_local(const Relobj*, unsigned int) const;
743 // Return the PLT address to use for a global symbol.
745 do_plt_address_for_global(const Symbol*) const;
747 // Return the offset to use for the GOT_INDX'th got entry which is
748 // for a local tls symbol specified by OBJECT, SYMNDX.
750 do_tls_offset_for_local(const Relobj* object,
752 unsigned int got_indx) const;
754 // Return the offset to use for the GOT_INDX'th got entry which is
755 // for global tls symbol GSYM.
757 do_tls_offset_for_global(Symbol* gsym, unsigned int got_indx) const;
760 do_function_location(Symbol_location*) const;
763 do_can_check_for_function_pointers() const
766 // Adjust -fsplit-stack code which calls non-split-stack code.
768 do_calls_non_split(Relobj* object, unsigned int shndx,
769 section_offset_type fnoffset, section_size_type fnsize,
770 const unsigned char* prelocs, size_t reloc_count,
771 unsigned char* view, section_size_type view_size,
772 std::string* from, std::string* to) const;
774 // Relocate a section.
776 relocate_section(const Relocate_info<size, big_endian>*,
777 unsigned int sh_type,
778 const unsigned char* prelocs,
780 Output_section* output_section,
781 bool needs_special_offset_handling,
783 Address view_address,
784 section_size_type view_size,
785 const Reloc_symbol_changes*);
787 // Scan the relocs during a relocatable link.
789 scan_relocatable_relocs(Symbol_table* symtab,
791 Sized_relobj_file<size, big_endian>* object,
792 unsigned int data_shndx,
793 unsigned int sh_type,
794 const unsigned char* prelocs,
796 Output_section* output_section,
797 bool needs_special_offset_handling,
798 size_t local_symbol_count,
799 const unsigned char* plocal_symbols,
800 Relocatable_relocs*);
802 // Scan the relocs for --emit-relocs.
804 emit_relocs_scan(Symbol_table* symtab,
806 Sized_relobj_file<size, big_endian>* object,
807 unsigned int data_shndx,
808 unsigned int sh_type,
809 const unsigned char* prelocs,
811 Output_section* output_section,
812 bool needs_special_offset_handling,
813 size_t local_symbol_count,
814 const unsigned char* plocal_syms,
815 Relocatable_relocs* rr);
817 // Emit relocations for a section.
819 relocate_relocs(const Relocate_info<size, big_endian>*,
820 unsigned int sh_type,
821 const unsigned char* prelocs,
823 Output_section* output_section,
824 typename elfcpp::Elf_types<size>::Elf_Off
825 offset_in_output_section,
827 Address view_address,
829 unsigned char* reloc_view,
830 section_size_type reloc_view_size);
832 // Return whether SYM is defined by the ABI.
834 do_is_defined_by_abi(const Symbol* sym) const
836 return strcmp(sym->name(), "__tls_get_addr") == 0;
839 // Return the size of the GOT section.
843 gold_assert(this->got_ != NULL);
844 return this->got_->data_size();
847 // Get the PLT section.
848 const Output_data_plt_powerpc<size, big_endian>*
851 gold_assert(this->plt_ != NULL);
855 // Get the IPLT section.
856 const Output_data_plt_powerpc<size, big_endian>*
859 gold_assert(this->iplt_ != NULL);
863 // Get the .glink section.
864 const Output_data_glink<size, big_endian>*
865 glink_section() const
867 gold_assert(this->glink_ != NULL);
871 Output_data_glink<size, big_endian>*
874 gold_assert(this->glink_ != NULL);
878 bool has_glink() const
879 { return this->glink_ != NULL; }
881 // Get the GOT section.
882 const Output_data_got_powerpc<size, big_endian>*
885 gold_assert(this->got_ != NULL);
889 // Get the GOT section, creating it if necessary.
890 Output_data_got_powerpc<size, big_endian>*
891 got_section(Symbol_table*, Layout*);
894 do_make_elf_object(const std::string&, Input_file*, off_t,
895 const elfcpp::Ehdr<size, big_endian>&);
897 // Return the number of entries in the GOT.
899 got_entry_count() const
901 if (this->got_ == NULL)
903 return this->got_size() / (size / 8);
906 // Return the number of entries in the PLT.
908 plt_entry_count() const;
910 // Return the offset of the first non-reserved PLT entry.
912 first_plt_entry_offset() const
916 if (this->abiversion() >= 2)
921 // Return the size of each PLT entry.
923 plt_entry_size() const
927 if (this->abiversion() >= 2)
932 Output_data_save_res<size, big_endian>*
933 savres_section() const
935 return this->savres_section_;
938 // Add any special sections for this symbol to the gc work list.
939 // For powerpc64, this adds the code section of a function
942 do_gc_mark_symbol(Symbol_table* symtab, Symbol* sym) const;
944 // Handle target specific gc actions when adding a gc reference from
945 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
946 // and DST_OFF. For powerpc64, this adds a referenc to the code
947 // section of a function descriptor.
949 do_gc_add_reference(Symbol_table* symtab,
951 unsigned int src_shndx,
953 unsigned int dst_shndx,
954 Address dst_off) const;
956 typedef std::vector<Stub_table<size, big_endian>*> Stub_tables;
959 { return this->stub_tables_; }
961 const Output_data_brlt_powerpc<size, big_endian>*
963 { return this->brlt_section_; }
966 add_branch_lookup_table(Address to)
968 unsigned int off = this->branch_lookup_table_.size() * (size / 8);
969 this->branch_lookup_table_.insert(std::make_pair(to, off));
973 find_branch_lookup_table(Address to)
975 typename Branch_lookup_table::const_iterator p
976 = this->branch_lookup_table_.find(to);
977 return p == this->branch_lookup_table_.end() ? invalid_address : p->second;
981 write_branch_lookup_table(unsigned char *oview)
983 for (typename Branch_lookup_table::const_iterator p
984 = this->branch_lookup_table_.begin();
985 p != this->branch_lookup_table_.end();
988 elfcpp::Swap<size, big_endian>::writeval(oview + p->second, p->first);
992 // Wrapper used after relax to define a local symbol in output data,
993 // from the end if value < 0.
995 define_local(Symbol_table* symtab, const char* name,
996 Output_data* od, Address value, unsigned int symsize)
999 = symtab->define_in_output_data(name, NULL, Symbol_table::PREDEFINED,
1000 od, value, symsize, elfcpp::STT_NOTYPE,
1001 elfcpp::STB_LOCAL, elfcpp::STV_HIDDEN, 0,
1002 static_cast<Signed_address>(value) < 0,
1004 // We are creating this symbol late, so need to fix up things
1005 // done early in Layout::finalize.
1006 sym->set_dynsym_index(-1U);
1010 plt_thread_safe() const
1011 { return this->plt_thread_safe_; }
1014 plt_localentry0() const
1015 { return this->plt_localentry0_; }
1018 set_has_localentry0()
1020 this->has_localentry0_ = true;
1024 is_elfv2_localentry0(const Symbol* gsym) const
1027 && this->abiversion() >= 2
1028 && this->plt_localentry0()
1029 && gsym->type() == elfcpp::STT_FUNC
1030 && gsym->is_defined()
1031 && gsym->nonvis() >> 3 == 0
1032 && !gsym->non_zero_localentry());
1036 is_elfv2_localentry0(const Sized_relobj_file<size, big_endian>* object,
1037 unsigned int r_sym) const
1039 const Powerpc_relobj<size, big_endian>* ppc_object
1040 = static_cast<const Powerpc_relobj<size, big_endian>*>(object);
1043 && this->abiversion() >= 2
1044 && this->plt_localentry0()
1045 && ppc_object->st_other(r_sym) >> 5 == 0)
1047 const Symbol_value<size>* psymval = object->local_symbol(r_sym);
1049 if (!psymval->is_ifunc_symbol()
1050 && psymval->input_shndx(&is_ordinary) != elfcpp::SHN_UNDEF
1057 // Remember any symbols seen with non-zero localentry, even those
1058 // not providing a definition
1060 resolve(Symbol* to, const elfcpp::Sym<size, big_endian>& sym, Object*,
1065 unsigned char st_other = sym.get_st_other();
1066 if ((st_other & elfcpp::STO_PPC64_LOCAL_MASK) != 0)
1067 to->set_non_zero_localentry();
1069 // We haven't resolved anything, continue normal processing.
1075 { return this->processor_specific_flags() & elfcpp::EF_PPC64_ABI; }
1078 set_abiversion(int ver)
1080 elfcpp::Elf_Word flags = this->processor_specific_flags();
1081 flags &= ~elfcpp::EF_PPC64_ABI;
1082 flags |= ver & elfcpp::EF_PPC64_ABI;
1083 this->set_processor_specific_flags(flags);
1087 tls_get_addr_opt() const
1088 { return this->tls_get_addr_opt_; }
1091 tls_get_addr() const
1092 { return this->tls_get_addr_; }
1094 // If optimizing __tls_get_addr calls, whether this is the
1095 // "__tls_get_addr" symbol.
1097 is_tls_get_addr_opt(const Symbol* gsym) const
1099 return this->tls_get_addr_opt_ && (gsym == this->tls_get_addr_
1100 || gsym == this->tls_get_addr_opt_);
1104 replace_tls_get_addr(const Symbol* gsym) const
1105 { return this->tls_get_addr_opt_ && gsym == this->tls_get_addr_; }
1108 set_has_tls_get_addr_opt()
1109 { this->has_tls_get_addr_opt_ = true; }
1111 // Offset to toc save stack slot
1114 { return this->abiversion() < 2 ? 40 : 24; }
1116 // Offset to linker save stack slot. ELFv2 doesn't have a linker word,
1117 // so use the CR save slot. Used only by __tls_get_addr call stub,
1118 // relying on __tls_get_addr not saving CR itself.
1121 { return this->abiversion() < 2 ? 32 : 8; }
1137 : tls_get_addr_state_(NOT_EXPECTED),
1138 relinfo_(NULL), relnum_(0), r_offset_(0)
1143 if (this->tls_get_addr_state_ != NOT_EXPECTED)
1150 if (this->relinfo_ != NULL)
1151 gold_error_at_location(this->relinfo_, this->relnum_, this->r_offset_,
1152 _("missing expected __tls_get_addr call"));
1156 expect_tls_get_addr_call(
1157 const Relocate_info<size, big_endian>* relinfo,
1161 this->tls_get_addr_state_ = EXPECTED;
1162 this->relinfo_ = relinfo;
1163 this->relnum_ = relnum;
1164 this->r_offset_ = r_offset;
1168 expect_tls_get_addr_call()
1169 { this->tls_get_addr_state_ = EXPECTED; }
1172 skip_next_tls_get_addr_call()
1173 {this->tls_get_addr_state_ = SKIP; }
1176 maybe_skip_tls_get_addr_call(Target_powerpc<size, big_endian>* target,
1177 unsigned int r_type, const Symbol* gsym)
1179 bool is_tls_call = ((r_type == elfcpp::R_POWERPC_REL24
1180 || r_type == elfcpp::R_PPC_PLTREL24)
1182 && (gsym == target->tls_get_addr()
1183 || gsym == target->tls_get_addr_opt()));
1184 Tls_get_addr last_tls = this->tls_get_addr_state_;
1185 this->tls_get_addr_state_ = NOT_EXPECTED;
1186 if (is_tls_call && last_tls != EXPECTED)
1188 else if (!is_tls_call && last_tls != NOT_EXPECTED)
1197 // What we're up to regarding calls to __tls_get_addr.
1198 // On powerpc, the branch and link insn making a call to
1199 // __tls_get_addr is marked with a relocation, R_PPC64_TLSGD,
1200 // R_PPC64_TLSLD, R_PPC_TLSGD or R_PPC_TLSLD, in addition to the
1201 // usual R_POWERPC_REL24 or R_PPC_PLTREL25 relocation on a call.
1202 // The marker relocation always comes first, and has the same
1203 // symbol as the reloc on the insn setting up the __tls_get_addr
1204 // argument. This ties the arg setup insn with the call insn,
1205 // allowing ld to safely optimize away the call. We check that
1206 // every call to __tls_get_addr has a marker relocation, and that
1207 // every marker relocation is on a call to __tls_get_addr.
1208 Tls_get_addr tls_get_addr_state_;
1209 // Info about the last reloc for error message.
1210 const Relocate_info<size, big_endian>* relinfo_;
1215 // The class which scans relocations.
1216 class Scan : protected Track_tls
1219 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
1222 : Track_tls(), issued_non_pic_error_(false)
1226 get_reference_flags(unsigned int r_type, const Target_powerpc* target);
1229 local(Symbol_table* symtab, Layout* layout, Target_powerpc* target,
1230 Sized_relobj_file<size, big_endian>* object,
1231 unsigned int data_shndx,
1232 Output_section* output_section,
1233 const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type,
1234 const elfcpp::Sym<size, big_endian>& lsym,
1238 global(Symbol_table* symtab, Layout* layout, Target_powerpc* target,
1239 Sized_relobj_file<size, big_endian>* object,
1240 unsigned int data_shndx,
1241 Output_section* output_section,
1242 const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type,
1246 local_reloc_may_be_function_pointer(Symbol_table* , Layout* ,
1248 Sized_relobj_file<size, big_endian>* relobj,
1251 const elfcpp::Rela<size, big_endian>& ,
1252 unsigned int r_type,
1253 const elfcpp::Sym<size, big_endian>&)
1255 // PowerPC64 .opd is not folded, so any identical function text
1256 // may be folded and we'll still keep function addresses distinct.
1257 // That means no reloc is of concern here.
1260 Powerpc_relobj<size, big_endian>* ppcobj = static_cast
1261 <Powerpc_relobj<size, big_endian>*>(relobj);
1262 if (ppcobj->abiversion() == 1)
1265 // For 32-bit and ELFv2, conservatively assume anything but calls to
1266 // function code might be taking the address of the function.
1267 return !is_branch_reloc(r_type);
1271 global_reloc_may_be_function_pointer(Symbol_table* , Layout* ,
1273 Sized_relobj_file<size, big_endian>* relobj,
1276 const elfcpp::Rela<size, big_endian>& ,
1277 unsigned int r_type,
1283 Powerpc_relobj<size, big_endian>* ppcobj = static_cast
1284 <Powerpc_relobj<size, big_endian>*>(relobj);
1285 if (ppcobj->abiversion() == 1)
1288 return !is_branch_reloc(r_type);
1292 reloc_needs_plt_for_ifunc(Target_powerpc<size, big_endian>* target,
1293 Sized_relobj_file<size, big_endian>* object,
1294 unsigned int r_type, bool report_err);
1298 unsupported_reloc_local(Sized_relobj_file<size, big_endian>*,
1299 unsigned int r_type);
1302 unsupported_reloc_global(Sized_relobj_file<size, big_endian>*,
1303 unsigned int r_type, Symbol*);
1306 generate_tls_call(Symbol_table* symtab, Layout* layout,
1307 Target_powerpc* target);
1310 check_non_pic(Relobj*, unsigned int r_type);
1312 // Whether we have issued an error about a non-PIC compilation.
1313 bool issued_non_pic_error_;
1317 symval_for_branch(const Symbol_table* symtab,
1318 const Sized_symbol<size>* gsym,
1319 Powerpc_relobj<size, big_endian>* object,
1320 Address *value, unsigned int *dest_shndx);
1322 // The class which implements relocation.
1323 class Relocate : protected Track_tls
1326 // Use 'at' branch hints when true, 'y' when false.
1327 // FIXME maybe: set this with an option.
1328 static const bool is_isa_v2 = true;
1334 // Do a relocation. Return false if the caller should not issue
1335 // any warnings about this relocation.
1337 relocate(const Relocate_info<size, big_endian>*, unsigned int,
1338 Target_powerpc*, Output_section*, size_t, const unsigned char*,
1339 const Sized_symbol<size>*, const Symbol_value<size>*,
1340 unsigned char*, typename elfcpp::Elf_types<size>::Elf_Addr,
1344 class Relocate_comdat_behavior
1347 // Decide what the linker should do for relocations that refer to
1348 // discarded comdat sections.
1349 inline Comdat_behavior
1350 get(const char* name)
1352 gold::Default_comdat_behavior default_behavior;
1353 Comdat_behavior ret = default_behavior.get(name);
1354 if (ret == CB_WARNING)
1357 && (strcmp(name, ".fixup") == 0
1358 || strcmp(name, ".got2") == 0))
1361 && (strcmp(name, ".opd") == 0
1362 || strcmp(name, ".toc") == 0
1363 || strcmp(name, ".toc1") == 0))
1370 // Optimize the TLS relocation type based on what we know about the
1371 // symbol. IS_FINAL is true if the final address of this symbol is
1372 // known at link time.
1374 tls::Tls_optimization
1375 optimize_tls_gd(bool is_final)
1377 // If we are generating a shared library, then we can't do anything
1379 if (parameters->options().shared()
1380 || !parameters->options().tls_optimize())
1381 return tls::TLSOPT_NONE;
1384 return tls::TLSOPT_TO_IE;
1385 return tls::TLSOPT_TO_LE;
1388 tls::Tls_optimization
1391 if (parameters->options().shared()
1392 || !parameters->options().tls_optimize())
1393 return tls::TLSOPT_NONE;
1395 return tls::TLSOPT_TO_LE;
1398 tls::Tls_optimization
1399 optimize_tls_ie(bool is_final)
1402 || parameters->options().shared()
1403 || !parameters->options().tls_optimize())
1404 return tls::TLSOPT_NONE;
1406 return tls::TLSOPT_TO_LE;
1411 make_glink_section(Layout*);
1413 // Create the PLT section.
1415 make_plt_section(Symbol_table*, Layout*);
1418 make_iplt_section(Symbol_table*, Layout*);
1421 make_brlt_section(Layout*);
1423 // Create a PLT entry for a global symbol.
1425 make_plt_entry(Symbol_table*, Layout*, Symbol*);
1427 // Create a PLT entry for a local IFUNC symbol.
1429 make_local_ifunc_plt_entry(Symbol_table*, Layout*,
1430 Sized_relobj_file<size, big_endian>*,
1434 // Create a GOT entry for local dynamic __tls_get_addr.
1436 tlsld_got_offset(Symbol_table* symtab, Layout* layout,
1437 Sized_relobj_file<size, big_endian>* object);
1440 tlsld_got_offset() const
1442 return this->tlsld_got_offset_;
1445 // Get the dynamic reloc section, creating it if necessary.
1447 rela_dyn_section(Layout*);
1449 // Similarly, but for ifunc symbols get the one for ifunc.
1451 rela_dyn_section(Symbol_table*, Layout*, bool for_ifunc);
1453 // Copy a relocation against a global symbol.
1455 copy_reloc(Symbol_table* symtab, Layout* layout,
1456 Sized_relobj_file<size, big_endian>* object,
1457 unsigned int shndx, Output_section* output_section,
1458 Symbol* sym, const elfcpp::Rela<size, big_endian>& reloc)
1460 unsigned int r_type = elfcpp::elf_r_type<size>(reloc.get_r_info());
1461 this->copy_relocs_.copy_reloc(symtab, layout,
1462 symtab->get_sized_symbol<size>(sym),
1463 object, shndx, output_section,
1464 r_type, reloc.get_r_offset(),
1465 reloc.get_r_addend(),
1466 this->rela_dyn_section(layout));
1469 // Look over all the input sections, deciding where to place stubs.
1471 group_sections(Layout*, const Task*, bool);
1473 // Sort output sections by address.
1474 struct Sort_sections
1477 operator()(const Output_section* sec1, const Output_section* sec2)
1478 { return sec1->address() < sec2->address(); }
1484 Branch_info(Powerpc_relobj<size, big_endian>* ppc_object,
1485 unsigned int data_shndx,
1487 unsigned int r_type,
1490 : object_(ppc_object), shndx_(data_shndx), offset_(r_offset),
1491 r_type_(r_type), tocsave_ (0), r_sym_(r_sym), addend_(addend)
1497 // Return whether this branch is going via a plt call stub, and if
1498 // so, mark it as having an R_PPC64_TOCSAVE.
1500 mark_pltcall(Powerpc_relobj<size, big_endian>* ppc_object,
1501 unsigned int shndx, Address offset,
1502 Target_powerpc* target, Symbol_table* symtab);
1504 // If this branch needs a plt call stub, or a long branch stub, make one.
1506 make_stub(Stub_table<size, big_endian>*,
1507 Stub_table<size, big_endian>*,
1508 Symbol_table*) const;
1511 // The branch location..
1512 Powerpc_relobj<size, big_endian>* object_;
1513 unsigned int shndx_;
1515 // ..and the branch type and destination.
1516 unsigned int r_type_ : 31;
1517 unsigned int tocsave_ : 1;
1518 unsigned int r_sym_;
1522 // Information about this specific target which we pass to the
1523 // general Target structure.
1524 static Target::Target_info powerpc_info;
1526 // The types of GOT entries needed for this platform.
1527 // These values are exposed to the ABI in an incremental link.
1528 // Do not renumber existing values without changing the version
1529 // number of the .gnu_incremental_inputs section.
1533 GOT_TYPE_TLSGD, // double entry for @got@tlsgd
1534 GOT_TYPE_DTPREL, // entry for @got@dtprel
1535 GOT_TYPE_TPREL // entry for @got@tprel
1539 Output_data_got_powerpc<size, big_endian>* got_;
1540 // The PLT section. This is a container for a table of addresses,
1541 // and their relocations. Each address in the PLT has a dynamic
1542 // relocation (R_*_JMP_SLOT) and each address will have a
1543 // corresponding entry in .glink for lazy resolution of the PLT.
1544 // ppc32 initialises the PLT to point at the .glink entry, while
1545 // ppc64 leaves this to ld.so. To make a call via the PLT, the
1546 // linker adds a stub that loads the PLT entry into ctr then
1547 // branches to ctr. There may be more than one stub for each PLT
1548 // entry. DT_JMPREL points at the first PLT dynamic relocation and
1549 // DT_PLTRELSZ gives the total size of PLT dynamic relocations.
1550 Output_data_plt_powerpc<size, big_endian>* plt_;
1551 // The IPLT section. Like plt_, this is a container for a table of
1552 // addresses and their relocations, specifically for STT_GNU_IFUNC
1553 // functions that resolve locally (STT_GNU_IFUNC functions that
1554 // don't resolve locally go in PLT). Unlike plt_, these have no
1555 // entry in .glink for lazy resolution, and the relocation section
1556 // does not have a 1-1 correspondence with IPLT addresses. In fact,
1557 // the relocation section may contain relocations against
1558 // STT_GNU_IFUNC symbols at locations outside of IPLT. The
1559 // relocation section will appear at the end of other dynamic
1560 // relocations, so that ld.so applies these relocations after other
1561 // dynamic relocations. In a static executable, the relocation
1562 // section is emitted and marked with __rela_iplt_start and
1563 // __rela_iplt_end symbols.
1564 Output_data_plt_powerpc<size, big_endian>* iplt_;
1565 // Section holding long branch destinations.
1566 Output_data_brlt_powerpc<size, big_endian>* brlt_section_;
1567 // The .glink section.
1568 Output_data_glink<size, big_endian>* glink_;
1569 // The dynamic reloc section.
1570 Reloc_section* rela_dyn_;
1571 // Relocs saved to avoid a COPY reloc.
1572 Powerpc_copy_relocs<elfcpp::SHT_RELA, size, big_endian> copy_relocs_;
1573 // Offset of the GOT entry for local dynamic __tls_get_addr calls.
1574 unsigned int tlsld_got_offset_;
1576 Stub_tables stub_tables_;
1577 typedef Unordered_map<Address, unsigned int> Branch_lookup_table;
1578 Branch_lookup_table branch_lookup_table_;
1580 typedef std::vector<Branch_info> Branches;
1581 Branches branch_info_;
1582 Tocsave_loc tocsave_loc_;
1584 bool plt_thread_safe_;
1585 bool plt_localentry0_;
1586 bool plt_localentry0_init_;
1587 bool has_localentry0_;
1588 bool has_tls_get_addr_opt_;
1591 int relax_fail_count_;
1592 int32_t stub_group_size_;
1594 Output_data_save_res<size, big_endian> *savres_section_;
1596 // The "__tls_get_addr" symbol, if present
1597 Symbol* tls_get_addr_;
1598 // If optimizing __tls_get_addr calls, the "__tls_get_addr_opt" symbol.
1599 Symbol* tls_get_addr_opt_;
1603 Target::Target_info Target_powerpc<32, true>::powerpc_info =
1606 true, // is_big_endian
1607 elfcpp::EM_PPC, // machine_code
1608 false, // has_make_symbol
1609 false, // has_resolve
1610 false, // has_code_fill
1611 true, // is_default_stack_executable
1612 false, // can_icf_inline_merge_sections
1614 "/usr/lib/ld.so.1", // dynamic_linker
1615 0x10000000, // default_text_segment_address
1616 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1617 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1618 false, // isolate_execinstr
1620 elfcpp::SHN_UNDEF, // small_common_shndx
1621 elfcpp::SHN_UNDEF, // large_common_shndx
1622 0, // small_common_section_flags
1623 0, // large_common_section_flags
1624 NULL, // attributes_section
1625 NULL, // attributes_vendor
1626 "_start", // entry_symbol_name
1627 32, // hash_entry_size
1631 Target::Target_info Target_powerpc<32, false>::powerpc_info =
1634 false, // is_big_endian
1635 elfcpp::EM_PPC, // machine_code
1636 false, // has_make_symbol
1637 false, // has_resolve
1638 false, // has_code_fill
1639 true, // is_default_stack_executable
1640 false, // can_icf_inline_merge_sections
1642 "/usr/lib/ld.so.1", // dynamic_linker
1643 0x10000000, // default_text_segment_address
1644 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1645 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1646 false, // isolate_execinstr
1648 elfcpp::SHN_UNDEF, // small_common_shndx
1649 elfcpp::SHN_UNDEF, // large_common_shndx
1650 0, // small_common_section_flags
1651 0, // large_common_section_flags
1652 NULL, // attributes_section
1653 NULL, // attributes_vendor
1654 "_start", // entry_symbol_name
1655 32, // hash_entry_size
1659 Target::Target_info Target_powerpc<64, true>::powerpc_info =
1662 true, // is_big_endian
1663 elfcpp::EM_PPC64, // machine_code
1664 false, // has_make_symbol
1665 true, // has_resolve
1666 false, // has_code_fill
1667 false, // is_default_stack_executable
1668 false, // can_icf_inline_merge_sections
1670 "/usr/lib/ld.so.1", // dynamic_linker
1671 0x10000000, // default_text_segment_address
1672 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1673 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1674 false, // isolate_execinstr
1676 elfcpp::SHN_UNDEF, // small_common_shndx
1677 elfcpp::SHN_UNDEF, // large_common_shndx
1678 0, // small_common_section_flags
1679 0, // large_common_section_flags
1680 NULL, // attributes_section
1681 NULL, // attributes_vendor
1682 "_start", // entry_symbol_name
1683 32, // hash_entry_size
1687 Target::Target_info Target_powerpc<64, false>::powerpc_info =
1690 false, // is_big_endian
1691 elfcpp::EM_PPC64, // machine_code
1692 false, // has_make_symbol
1693 true, // has_resolve
1694 false, // has_code_fill
1695 false, // is_default_stack_executable
1696 false, // can_icf_inline_merge_sections
1698 "/usr/lib/ld.so.1", // dynamic_linker
1699 0x10000000, // default_text_segment_address
1700 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1701 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1702 false, // isolate_execinstr
1704 elfcpp::SHN_UNDEF, // small_common_shndx
1705 elfcpp::SHN_UNDEF, // large_common_shndx
1706 0, // small_common_section_flags
1707 0, // large_common_section_flags
1708 NULL, // attributes_section
1709 NULL, // attributes_vendor
1710 "_start", // entry_symbol_name
1711 32, // hash_entry_size
1715 is_branch_reloc(unsigned int r_type)
1717 return (r_type == elfcpp::R_POWERPC_REL24
1718 || r_type == elfcpp::R_PPC_PLTREL24
1719 || r_type == elfcpp::R_PPC_LOCAL24PC
1720 || r_type == elfcpp::R_POWERPC_REL14
1721 || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN
1722 || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN
1723 || r_type == elfcpp::R_POWERPC_ADDR24
1724 || r_type == elfcpp::R_POWERPC_ADDR14
1725 || r_type == elfcpp::R_POWERPC_ADDR14_BRTAKEN
1726 || r_type == elfcpp::R_POWERPC_ADDR14_BRNTAKEN);
1729 // If INSN is an opcode that may be used with an @tls operand, return
1730 // the transformed insn for TLS optimisation, otherwise return 0. If
1731 // REG is non-zero only match an insn with RB or RA equal to REG.
1733 at_tls_transform(uint32_t insn, unsigned int reg)
1735 if ((insn & (0x3f << 26)) != 31 << 26)
1739 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
1740 rtra = insn & ((1 << 26) - (1 << 16));
1741 else if (((insn >> 16) & 0x1f) == reg)
1742 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
1746 if ((insn & (0x3ff << 1)) == 266 << 1)
1749 else if ((insn & (0x1f << 1)) == 23 << 1
1750 && ((insn & (0x1f << 6)) < 14 << 6
1751 || ((insn & (0x1f << 6)) >= 16 << 6
1752 && (insn & (0x1f << 6)) < 24 << 6)))
1753 // load and store indexed -> dform
1754 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
1755 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
1756 // ldx, ldux, stdx, stdux -> ld, ldu, std, stdu
1757 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
1758 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
1760 insn = (58 << 26) | 2;
1768 template<int size, bool big_endian>
1769 class Powerpc_relocate_functions
1789 typedef Powerpc_relocate_functions<size, big_endian> This;
1790 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
1791 typedef typename elfcpp::Elf_types<size>::Elf_Swxword SignedAddress;
1793 template<int valsize>
1795 has_overflow_signed(Address value)
1797 // limit = 1 << (valsize - 1) without shift count exceeding size of type
1798 Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1);
1799 limit <<= ((valsize - 1) >> 1);
1800 limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1));
1801 return value + limit > (limit << 1) - 1;
1804 template<int valsize>
1806 has_overflow_unsigned(Address value)
1808 Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1);
1809 limit <<= ((valsize - 1) >> 1);
1810 limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1));
1811 return value > (limit << 1) - 1;
1814 template<int valsize>
1816 has_overflow_bitfield(Address value)
1818 return (has_overflow_unsigned<valsize>(value)
1819 && has_overflow_signed<valsize>(value));
1822 template<int valsize>
1823 static inline Status
1824 overflowed(Address value, Overflow_check overflow)
1826 if (overflow == CHECK_SIGNED)
1828 if (has_overflow_signed<valsize>(value))
1829 return STATUS_OVERFLOW;
1831 else if (overflow == CHECK_UNSIGNED)
1833 if (has_overflow_unsigned<valsize>(value))
1834 return STATUS_OVERFLOW;
1836 else if (overflow == CHECK_BITFIELD)
1838 if (has_overflow_bitfield<valsize>(value))
1839 return STATUS_OVERFLOW;
1844 // Do a simple RELA relocation
1845 template<int fieldsize, int valsize>
1846 static inline Status
1847 rela(unsigned char* view, Address value, Overflow_check overflow)
1849 typedef typename elfcpp::Swap<fieldsize, big_endian>::Valtype Valtype;
1850 Valtype* wv = reinterpret_cast<Valtype*>(view);
1851 elfcpp::Swap<fieldsize, big_endian>::writeval(wv, value);
1852 return overflowed<valsize>(value, overflow);
1855 template<int fieldsize, int valsize>
1856 static inline Status
1857 rela(unsigned char* view,
1858 unsigned int right_shift,
1859 typename elfcpp::Valtype_base<fieldsize>::Valtype dst_mask,
1861 Overflow_check overflow)
1863 typedef typename elfcpp::Swap<fieldsize, big_endian>::Valtype Valtype;
1864 Valtype* wv = reinterpret_cast<Valtype*>(view);
1865 Valtype val = elfcpp::Swap<fieldsize, big_endian>::readval(wv);
1866 Valtype reloc = value >> right_shift;
1869 elfcpp::Swap<fieldsize, big_endian>::writeval(wv, val | reloc);
1870 return overflowed<valsize>(value >> right_shift, overflow);
1873 // Do a simple RELA relocation, unaligned.
1874 template<int fieldsize, int valsize>
1875 static inline Status
1876 rela_ua(unsigned char* view, Address value, Overflow_check overflow)
1878 elfcpp::Swap_unaligned<fieldsize, big_endian>::writeval(view, value);
1879 return overflowed<valsize>(value, overflow);
1882 template<int fieldsize, int valsize>
1883 static inline Status
1884 rela_ua(unsigned char* view,
1885 unsigned int right_shift,
1886 typename elfcpp::Valtype_base<fieldsize>::Valtype dst_mask,
1888 Overflow_check overflow)
1890 typedef typename elfcpp::Swap_unaligned<fieldsize, big_endian>::Valtype
1892 Valtype val = elfcpp::Swap<fieldsize, big_endian>::readval(view);
1893 Valtype reloc = value >> right_shift;
1896 elfcpp::Swap_unaligned<fieldsize, big_endian>::writeval(view, val | reloc);
1897 return overflowed<valsize>(value >> right_shift, overflow);
1901 // R_PPC64_ADDR64: (Symbol + Addend)
1903 addr64(unsigned char* view, Address value)
1904 { This::template rela<64,64>(view, value, CHECK_NONE); }
1906 // R_PPC64_UADDR64: (Symbol + Addend) unaligned
1908 addr64_u(unsigned char* view, Address value)
1909 { This::template rela_ua<64,64>(view, value, CHECK_NONE); }
1911 // R_POWERPC_ADDR32: (Symbol + Addend)
1912 static inline Status
1913 addr32(unsigned char* view, Address value, Overflow_check overflow)
1914 { return This::template rela<32,32>(view, value, overflow); }
1916 // R_POWERPC_UADDR32: (Symbol + Addend) unaligned
1917 static inline Status
1918 addr32_u(unsigned char* view, Address value, Overflow_check overflow)
1919 { return This::template rela_ua<32,32>(view, value, overflow); }
1921 // R_POWERPC_ADDR24: (Symbol + Addend) & 0x3fffffc
1922 static inline Status
1923 addr24(unsigned char* view, Address value, Overflow_check overflow)
1925 Status stat = This::template rela<32,26>(view, 0, 0x03fffffc,
1927 if (overflow != CHECK_NONE && (value & 3) != 0)
1928 stat = STATUS_OVERFLOW;
1932 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff
1933 static inline Status
1934 addr16(unsigned char* view, Address value, Overflow_check overflow)
1935 { return This::template rela<16,16>(view, value, overflow); }
1937 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff, unaligned
1938 static inline Status
1939 addr16_u(unsigned char* view, Address value, Overflow_check overflow)
1940 { return This::template rela_ua<16,16>(view, value, overflow); }
1942 // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc
1943 static inline Status
1944 addr16_ds(unsigned char* view, Address value, Overflow_check overflow)
1946 Status stat = This::template rela<16,16>(view, 0, 0xfffc, value, overflow);
1947 if ((value & 3) != 0)
1948 stat = STATUS_OVERFLOW;
1952 // R_POWERPC_ADDR16_DQ: (Symbol + Addend) & 0xfff0
1953 static inline Status
1954 addr16_dq(unsigned char* view, Address value, Overflow_check overflow)
1956 Status stat = This::template rela<16,16>(view, 0, 0xfff0, value, overflow);
1957 if ((value & 15) != 0)
1958 stat = STATUS_OVERFLOW;
1962 // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff
1964 addr16_hi(unsigned char* view, Address value)
1965 { This::template rela<16,16>(view, 16, 0xffff, value, CHECK_NONE); }
1967 // R_POWERPC_ADDR16_HA: ((Symbol + Addend + 0x8000) >> 16) & 0xffff
1969 addr16_ha(unsigned char* view, Address value)
1970 { This::addr16_hi(view, value + 0x8000); }
1972 // R_POWERPC_ADDR16_HIGHER: ((Symbol + Addend) >> 32) & 0xffff
1974 addr16_hi2(unsigned char* view, Address value)
1975 { This::template rela<16,16>(view, 32, 0xffff, value, CHECK_NONE); }
1977 // R_POWERPC_ADDR16_HIGHERA: ((Symbol + Addend + 0x8000) >> 32) & 0xffff
1979 addr16_ha2(unsigned char* view, Address value)
1980 { This::addr16_hi2(view, value + 0x8000); }
1982 // R_POWERPC_ADDR16_HIGHEST: ((Symbol + Addend) >> 48) & 0xffff
1984 addr16_hi3(unsigned char* view, Address value)
1985 { This::template rela<16,16>(view, 48, 0xffff, value, CHECK_NONE); }
1987 // R_POWERPC_ADDR16_HIGHESTA: ((Symbol + Addend + 0x8000) >> 48) & 0xffff
1989 addr16_ha3(unsigned char* view, Address value)
1990 { This::addr16_hi3(view, value + 0x8000); }
1992 // R_POWERPC_ADDR14: (Symbol + Addend) & 0xfffc
1993 static inline Status
1994 addr14(unsigned char* view, Address value, Overflow_check overflow)
1996 Status stat = This::template rela<32,16>(view, 0, 0xfffc, value, overflow);
1997 if (overflow != CHECK_NONE && (value & 3) != 0)
1998 stat = STATUS_OVERFLOW;
2002 // R_POWERPC_REL16DX_HA
2003 static inline Status
2004 addr16dx_ha(unsigned char *view, Address value, Overflow_check overflow)
2006 typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype;
2007 Valtype* wv = reinterpret_cast<Valtype*>(view);
2008 Valtype val = elfcpp::Swap<32, big_endian>::readval(wv);
2010 value = static_cast<SignedAddress>(value) >> 16;
2011 val |= (value & 0xffc1) | ((value & 0x3e) << 15);
2012 elfcpp::Swap<32, big_endian>::writeval(wv, val);
2013 return overflowed<16>(value, overflow);
2017 // Set ABI version for input and output.
2019 template<int size, bool big_endian>
2021 Powerpc_relobj<size, big_endian>::set_abiversion(int ver)
2023 this->e_flags_ |= ver;
2024 if (this->abiversion() != 0)
2026 Target_powerpc<size, big_endian>* target =
2027 static_cast<Target_powerpc<size, big_endian>*>(
2028 parameters->sized_target<size, big_endian>());
2029 if (target->abiversion() == 0)
2030 target->set_abiversion(this->abiversion());
2031 else if (target->abiversion() != this->abiversion())
2032 gold_error(_("%s: ABI version %d is not compatible "
2033 "with ABI version %d output"),
2034 this->name().c_str(),
2035 this->abiversion(), target->abiversion());
2040 // Stash away the index of .got2, .opd, .rela.toc, and .toc in a
2041 // relocatable object, if such sections exists.
2043 template<int size, bool big_endian>
2045 Powerpc_relobj<size, big_endian>::do_find_special_sections(
2046 Read_symbols_data* sd)
2048 const unsigned char* const pshdrs = sd->section_headers->data();
2049 const unsigned char* namesu = sd->section_names->data();
2050 const char* names = reinterpret_cast<const char*>(namesu);
2051 section_size_type names_size = sd->section_names_size;
2052 const unsigned char* s;
2054 s = this->template find_shdr<size, big_endian>(pshdrs,
2055 size == 32 ? ".got2" : ".opd",
2056 names, names_size, NULL);
2059 unsigned int ndx = (s - pshdrs) / elfcpp::Elf_sizes<size>::shdr_size;
2060 this->special_ = ndx;
2063 if (this->abiversion() == 0)
2064 this->set_abiversion(1);
2065 else if (this->abiversion() > 1)
2066 gold_error(_("%s: .opd invalid in abiv%d"),
2067 this->name().c_str(), this->abiversion());
2072 s = this->template find_shdr<size, big_endian>(pshdrs, ".rela.toc",
2073 names, names_size, NULL);
2076 unsigned int ndx = (s - pshdrs) / elfcpp::Elf_sizes<size>::shdr_size;
2077 this->relatoc_ = ndx;
2078 typename elfcpp::Shdr<size, big_endian> shdr(s);
2079 this->toc_ = this->adjust_shndx(shdr.get_sh_info());
2082 return Sized_relobj_file<size, big_endian>::do_find_special_sections(sd);
2085 // Examine .rela.opd to build info about function entry points.
2087 template<int size, bool big_endian>
2089 Powerpc_relobj<size, big_endian>::scan_opd_relocs(
2091 const unsigned char* prelocs,
2092 const unsigned char* plocal_syms)
2096 typedef typename elfcpp::Rela<size, big_endian> Reltype;
2097 const int reloc_size = elfcpp::Elf_sizes<size>::rela_size;
2098 const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
2099 Address expected_off = 0;
2100 bool regular = true;
2101 unsigned int opd_ent_size = 0;
2103 for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size)
2105 Reltype reloc(prelocs);
2106 typename elfcpp::Elf_types<size>::Elf_WXword r_info
2107 = reloc.get_r_info();
2108 unsigned int r_type = elfcpp::elf_r_type<size>(r_info);
2109 if (r_type == elfcpp::R_PPC64_ADDR64)
2111 unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info);
2112 typename elfcpp::Elf_types<size>::Elf_Addr value;
2115 if (r_sym < this->local_symbol_count())
2117 typename elfcpp::Sym<size, big_endian>
2118 lsym(plocal_syms + r_sym * sym_size);
2119 shndx = lsym.get_st_shndx();
2120 shndx = this->adjust_sym_shndx(r_sym, shndx, &is_ordinary);
2121 value = lsym.get_st_value();
2124 shndx = this->symbol_section_and_value(r_sym, &value,
2126 this->set_opd_ent(reloc.get_r_offset(), shndx,
2127 value + reloc.get_r_addend());
2130 expected_off = reloc.get_r_offset();
2131 opd_ent_size = expected_off;
2133 else if (expected_off != reloc.get_r_offset())
2135 expected_off += opd_ent_size;
2137 else if (r_type == elfcpp::R_PPC64_TOC)
2139 if (expected_off - opd_ent_size + 8 != reloc.get_r_offset())
2144 gold_warning(_("%s: unexpected reloc type %u in .opd section"),
2145 this->name().c_str(), r_type);
2149 if (reloc_count <= 2)
2150 opd_ent_size = this->section_size(this->opd_shndx());
2151 if (opd_ent_size != 24 && opd_ent_size != 16)
2155 gold_warning(_("%s: .opd is not a regular array of opd entries"),
2156 this->name().c_str());
2162 // Returns true if a code sequence loading the TOC entry at VALUE
2163 // relative to the TOC pointer can be converted into code calculating
2164 // a TOC pointer relative offset.
2165 // If so, the TOC pointer relative offset is stored to VALUE.
2167 template<int size, bool big_endian>
2169 Powerpc_relobj<size, big_endian>::make_toc_relative(
2170 Target_powerpc<size, big_endian>* target,
2176 // With -mcmodel=medium code it is quite possible to have
2177 // toc-relative relocs referring to objects outside the TOC.
2178 // Don't try to look at a non-existent TOC.
2179 if (this->toc_shndx() == 0)
2182 // Convert VALUE back to an address by adding got_base (see below),
2183 // then to an offset in the TOC by subtracting the TOC output
2184 // section address and the TOC output offset. Since this TOC output
2185 // section and the got output section are one and the same, we can
2186 // omit adding and subtracting the output section address.
2187 Address off = (*value + this->toc_base_offset()
2188 - this->output_section_offset(this->toc_shndx()));
2189 // Is this offset in the TOC? -mcmodel=medium code may be using
2190 // TOC relative access to variables outside the TOC. Those of
2191 // course can't be optimized. We also don't try to optimize code
2192 // that is using a different object's TOC.
2193 if (off >= this->section_size(this->toc_shndx()))
2196 if (this->no_toc_opt(off))
2199 section_size_type vlen;
2200 unsigned char* view = this->get_output_view(this->toc_shndx(), &vlen);
2201 Address addr = elfcpp::Swap<size, big_endian>::readval(view + off);
2203 Address got_base = (target->got_section()->output_section()->address()
2204 + this->toc_base_offset());
2206 if (addr + (uint64_t) 0x80008000 >= (uint64_t) 1 << 32)
2213 // Perform the Sized_relobj_file method, then set up opd info from
2216 template<int size, bool big_endian>
2218 Powerpc_relobj<size, big_endian>::do_read_relocs(Read_relocs_data* rd)
2220 Sized_relobj_file<size, big_endian>::do_read_relocs(rd);
2223 for (Read_relocs_data::Relocs_list::iterator p = rd->relocs.begin();
2224 p != rd->relocs.end();
2227 if (p->data_shndx == this->opd_shndx())
2229 uint64_t opd_size = this->section_size(this->opd_shndx());
2230 gold_assert(opd_size == static_cast<size_t>(opd_size));
2233 this->init_opd(opd_size);
2234 this->scan_opd_relocs(p->reloc_count, p->contents->data(),
2235 rd->local_symbols->data());
2243 // Read the symbols then set up st_other vector.
2245 template<int size, bool big_endian>
2247 Powerpc_relobj<size, big_endian>::do_read_symbols(Read_symbols_data* sd)
2249 this->base_read_symbols(sd);
2252 const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size;
2253 const unsigned char* const pshdrs = sd->section_headers->data();
2254 const unsigned int loccount = this->do_local_symbol_count();
2257 this->st_other_.resize(loccount);
2258 const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
2259 off_t locsize = loccount * sym_size;
2260 const unsigned int symtab_shndx = this->symtab_shndx();
2261 const unsigned char *psymtab = pshdrs + symtab_shndx * shdr_size;
2262 typename elfcpp::Shdr<size, big_endian> shdr(psymtab);
2263 const unsigned char* psyms = this->get_view(shdr.get_sh_offset(),
2264 locsize, true, false);
2266 for (unsigned int i = 1; i < loccount; ++i, psyms += sym_size)
2268 elfcpp::Sym<size, big_endian> sym(psyms);
2269 unsigned char st_other = sym.get_st_other();
2270 this->st_other_[i] = st_other;
2271 if ((st_other & elfcpp::STO_PPC64_LOCAL_MASK) != 0)
2273 if (this->abiversion() == 0)
2274 this->set_abiversion(2);
2275 else if (this->abiversion() < 2)
2276 gold_error(_("%s: local symbol %d has invalid st_other"
2277 " for ABI version 1"),
2278 this->name().c_str(), i);
2285 template<int size, bool big_endian>
2287 Powerpc_dynobj<size, big_endian>::set_abiversion(int ver)
2289 this->e_flags_ |= ver;
2290 if (this->abiversion() != 0)
2292 Target_powerpc<size, big_endian>* target =
2293 static_cast<Target_powerpc<size, big_endian>*>(
2294 parameters->sized_target<size, big_endian>());
2295 if (target->abiversion() == 0)
2296 target->set_abiversion(this->abiversion());
2297 else if (target->abiversion() != this->abiversion())
2298 gold_error(_("%s: ABI version %d is not compatible "
2299 "with ABI version %d output"),
2300 this->name().c_str(),
2301 this->abiversion(), target->abiversion());
2306 // Call Sized_dynobj::base_read_symbols to read the symbols then
2307 // read .opd from a dynamic object, filling in opd_ent_ vector,
2309 template<int size, bool big_endian>
2311 Powerpc_dynobj<size, big_endian>::do_read_symbols(Read_symbols_data* sd)
2313 this->base_read_symbols(sd);
2316 const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size;
2317 const unsigned char* const pshdrs = sd->section_headers->data();
2318 const unsigned char* namesu = sd->section_names->data();
2319 const char* names = reinterpret_cast<const char*>(namesu);
2320 const unsigned char* s = NULL;
2321 const unsigned char* opd;
2322 section_size_type opd_size;
2324 // Find and read .opd section.
2327 s = this->template find_shdr<size, big_endian>(pshdrs, ".opd", names,
2328 sd->section_names_size,
2333 typename elfcpp::Shdr<size, big_endian> shdr(s);
2334 if (shdr.get_sh_type() == elfcpp::SHT_PROGBITS
2335 && (shdr.get_sh_flags() & elfcpp::SHF_ALLOC) != 0)
2337 if (this->abiversion() == 0)
2338 this->set_abiversion(1);
2339 else if (this->abiversion() > 1)
2340 gold_error(_("%s: .opd invalid in abiv%d"),
2341 this->name().c_str(), this->abiversion());
2343 this->opd_shndx_ = (s - pshdrs) / shdr_size;
2344 this->opd_address_ = shdr.get_sh_addr();
2345 opd_size = convert_to_section_size_type(shdr.get_sh_size());
2346 opd = this->get_view(shdr.get_sh_offset(), opd_size,
2352 // Build set of executable sections.
2353 // Using a set is probably overkill. There is likely to be only
2354 // a few executable sections, typically .init, .text and .fini,
2355 // and they are generally grouped together.
2356 typedef std::set<Sec_info> Exec_sections;
2357 Exec_sections exec_sections;
2359 for (unsigned int i = 1; i < this->shnum(); ++i, s += shdr_size)
2361 typename elfcpp::Shdr<size, big_endian> shdr(s);
2362 if (shdr.get_sh_type() == elfcpp::SHT_PROGBITS
2363 && ((shdr.get_sh_flags()
2364 & (elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR))
2365 == (elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR))
2366 && shdr.get_sh_size() != 0)
2368 exec_sections.insert(Sec_info(shdr.get_sh_addr(),
2369 shdr.get_sh_size(), i));
2372 if (exec_sections.empty())
2375 // Look over the OPD entries. This is complicated by the fact
2376 // that some binaries will use two-word entries while others
2377 // will use the standard three-word entries. In most cases
2378 // the third word (the environment pointer for languages like
2379 // Pascal) is unused and will be zero. If the third word is
2380 // used it should not be pointing into executable sections,
2382 this->init_opd(opd_size);
2383 for (const unsigned char* p = opd; p < opd + opd_size; p += 8)
2385 typedef typename elfcpp::Swap<64, big_endian>::Valtype Valtype;
2386 const Valtype* valp = reinterpret_cast<const Valtype*>(p);
2387 Valtype val = elfcpp::Swap<64, big_endian>::readval(valp);
2389 // Chances are that this is the third word of an OPD entry.
2391 typename Exec_sections::const_iterator e
2392 = exec_sections.upper_bound(Sec_info(val, 0, 0));
2393 if (e != exec_sections.begin())
2396 if (e->start <= val && val < e->start + e->len)
2398 // We have an address in an executable section.
2399 // VAL ought to be the function entry, set it up.
2400 this->set_opd_ent(p - opd, e->shndx, val);
2401 // Skip second word of OPD entry, the TOC pointer.
2405 // If we didn't match any executable sections, we likely
2406 // have a non-zero third word in the OPD entry.
2411 // Relocate sections.
2413 template<int size, bool big_endian>
2415 Powerpc_relobj<size, big_endian>::do_relocate_sections(
2416 const Symbol_table* symtab, const Layout* layout,
2417 const unsigned char* pshdrs, Output_file* of,
2418 typename Sized_relobj_file<size, big_endian>::Views* pviews)
2420 unsigned int start = 1;
2422 && this->relatoc_ != 0
2423 && !parameters->options().relocatable())
2425 // Relocate .toc first.
2426 this->relocate_section_range(symtab, layout, pshdrs, of, pviews,
2427 this->relatoc_, this->relatoc_);
2428 this->relocate_section_range(symtab, layout, pshdrs, of, pviews,
2429 1, this->relatoc_ - 1);
2430 start = this->relatoc_ + 1;
2432 this->relocate_section_range(symtab, layout, pshdrs, of, pviews,
2433 start, this->shnum() - 1);
2436 // Set up some symbols.
2438 template<int size, bool big_endian>
2440 Target_powerpc<size, big_endian>::do_define_standard_symbols(
2441 Symbol_table* symtab,
2446 // Define _GLOBAL_OFFSET_TABLE_ to ensure it isn't seen as
2447 // undefined when scanning relocs (and thus requires
2448 // non-relative dynamic relocs). The proper value will be
2450 Symbol *gotsym = symtab->lookup("_GLOBAL_OFFSET_TABLE_", NULL);
2451 if (gotsym != NULL && gotsym->is_undefined())
2453 Target_powerpc<size, big_endian>* target =
2454 static_cast<Target_powerpc<size, big_endian>*>(
2455 parameters->sized_target<size, big_endian>());
2456 Output_data_got_powerpc<size, big_endian>* got
2457 = target->got_section(symtab, layout);
2458 symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL,
2459 Symbol_table::PREDEFINED,
2463 elfcpp::STV_HIDDEN, 0,
2467 // Define _SDA_BASE_ at the start of the .sdata section + 32768.
2468 Symbol *sdasym = symtab->lookup("_SDA_BASE_", NULL);
2469 if (sdasym != NULL && sdasym->is_undefined())
2471 Output_data_space* sdata = new Output_data_space(4, "** sdata");
2473 = layout->add_output_section_data(".sdata", 0,
2475 | elfcpp::SHF_WRITE,
2476 sdata, ORDER_SMALL_DATA, false);
2477 symtab->define_in_output_data("_SDA_BASE_", NULL,
2478 Symbol_table::PREDEFINED,
2479 os, 32768, 0, elfcpp::STT_OBJECT,
2480 elfcpp::STB_LOCAL, elfcpp::STV_HIDDEN,
2486 // Define .TOC. as for 32-bit _GLOBAL_OFFSET_TABLE_
2487 Symbol *gotsym = symtab->lookup(".TOC.", NULL);
2488 if (gotsym != NULL && gotsym->is_undefined())
2490 Target_powerpc<size, big_endian>* target =
2491 static_cast<Target_powerpc<size, big_endian>*>(
2492 parameters->sized_target<size, big_endian>());
2493 Output_data_got_powerpc<size, big_endian>* got
2494 = target->got_section(symtab, layout);
2495 symtab->define_in_output_data(".TOC.", NULL,
2496 Symbol_table::PREDEFINED,
2500 elfcpp::STV_HIDDEN, 0,
2505 this->tls_get_addr_ = symtab->lookup("__tls_get_addr");
2506 if (parameters->options().tls_get_addr_optimize()
2507 && this->tls_get_addr_ != NULL
2508 && this->tls_get_addr_->in_reg())
2509 this->tls_get_addr_opt_ = symtab->lookup("__tls_get_addr_opt");
2510 if (this->tls_get_addr_opt_ != NULL)
2512 if (this->tls_get_addr_->is_undefined()
2513 || this->tls_get_addr_->is_from_dynobj())
2515 // Make it seem as if references to __tls_get_addr are
2516 // really to __tls_get_addr_opt, so the latter symbol is
2517 // made dynamic, not the former.
2518 this->tls_get_addr_->clear_in_reg();
2519 this->tls_get_addr_opt_->set_in_reg();
2521 // We have a non-dynamic definition for __tls_get_addr.
2522 // Make __tls_get_addr_opt the same, if it does not already have
2523 // a non-dynamic definition.
2524 else if (this->tls_get_addr_opt_->is_undefined()
2525 || this->tls_get_addr_opt_->is_from_dynobj())
2527 Sized_symbol<size>* from
2528 = static_cast<Sized_symbol<size>*>(this->tls_get_addr_);
2529 Sized_symbol<size>* to
2530 = static_cast<Sized_symbol<size>*>(this->tls_get_addr_opt_);
2531 symtab->clone<size>(to, from);
2536 // Set up PowerPC target specific relobj.
2538 template<int size, bool big_endian>
2540 Target_powerpc<size, big_endian>::do_make_elf_object(
2541 const std::string& name,
2542 Input_file* input_file,
2543 off_t offset, const elfcpp::Ehdr<size, big_endian>& ehdr)
2545 int et = ehdr.get_e_type();
2546 // ET_EXEC files are valid input for --just-symbols/-R,
2547 // and we treat them as relocatable objects.
2548 if (et == elfcpp::ET_REL
2549 || (et == elfcpp::ET_EXEC && input_file->just_symbols()))
2551 Powerpc_relobj<size, big_endian>* obj =
2552 new Powerpc_relobj<size, big_endian>(name, input_file, offset, ehdr);
2556 else if (et == elfcpp::ET_DYN)
2558 Powerpc_dynobj<size, big_endian>* obj =
2559 new Powerpc_dynobj<size, big_endian>(name, input_file, offset, ehdr);
2565 gold_error(_("%s: unsupported ELF file type %d"), name.c_str(), et);
2570 template<int size, bool big_endian>
2571 class Output_data_got_powerpc : public Output_data_got<size, big_endian>
2574 typedef typename elfcpp::Elf_types<size>::Elf_Addr Valtype;
2575 typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Rela_dyn;
2577 Output_data_got_powerpc(Symbol_table* symtab, Layout* layout)
2578 : Output_data_got<size, big_endian>(),
2579 symtab_(symtab), layout_(layout),
2580 header_ent_cnt_(size == 32 ? 3 : 1),
2581 header_index_(size == 32 ? 0x2000 : 0)
2584 this->set_addralign(256);
2587 // Override all the Output_data_got methods we use so as to first call
2590 add_global(Symbol* gsym, unsigned int got_type)
2592 this->reserve_ent();
2593 return Output_data_got<size, big_endian>::add_global(gsym, got_type);
2597 add_global_plt(Symbol* gsym, unsigned int got_type)
2599 this->reserve_ent();
2600 return Output_data_got<size, big_endian>::add_global_plt(gsym, got_type);
2604 add_global_tls(Symbol* gsym, unsigned int got_type)
2605 { return this->add_global_plt(gsym, got_type); }
2608 add_global_with_rel(Symbol* gsym, unsigned int got_type,
2609 Output_data_reloc_generic* rel_dyn, unsigned int r_type)
2611 this->reserve_ent();
2612 Output_data_got<size, big_endian>::
2613 add_global_with_rel(gsym, got_type, rel_dyn, r_type);
2617 add_global_pair_with_rel(Symbol* gsym, unsigned int got_type,
2618 Output_data_reloc_generic* rel_dyn,
2619 unsigned int r_type_1, unsigned int r_type_2)
2621 if (gsym->has_got_offset(got_type))
2624 this->reserve_ent(2);
2625 Output_data_got<size, big_endian>::
2626 add_global_pair_with_rel(gsym, got_type, rel_dyn, r_type_1, r_type_2);
2630 add_local(Relobj* object, unsigned int sym_index, unsigned int got_type)
2632 this->reserve_ent();
2633 return Output_data_got<size, big_endian>::add_local(object, sym_index,
2638 add_local_plt(Relobj* object, unsigned int sym_index, unsigned int got_type)
2640 this->reserve_ent();
2641 return Output_data_got<size, big_endian>::add_local_plt(object, sym_index,
2646 add_local_tls(Relobj* object, unsigned int sym_index, unsigned int got_type)
2647 { return this->add_local_plt(object, sym_index, got_type); }
2650 add_local_tls_pair(Relobj* object, unsigned int sym_index,
2651 unsigned int got_type,
2652 Output_data_reloc_generic* rel_dyn,
2653 unsigned int r_type)
2655 if (object->local_has_got_offset(sym_index, got_type))
2658 this->reserve_ent(2);
2659 Output_data_got<size, big_endian>::
2660 add_local_tls_pair(object, sym_index, got_type, rel_dyn, r_type);
2664 add_constant(Valtype constant)
2666 this->reserve_ent();
2667 return Output_data_got<size, big_endian>::add_constant(constant);
2671 add_constant_pair(Valtype c1, Valtype c2)
2673 this->reserve_ent(2);
2674 return Output_data_got<size, big_endian>::add_constant_pair(c1, c2);
2677 // Offset of _GLOBAL_OFFSET_TABLE_.
2681 return this->got_offset(this->header_index_);
2684 // Offset of base used to access the GOT/TOC.
2685 // The got/toc pointer reg will be set to this value.
2687 got_base_offset(const Powerpc_relobj<size, big_endian>* object) const
2690 return this->g_o_t();
2692 return (this->output_section()->address()
2693 + object->toc_base_offset()
2697 // Ensure our GOT has a header.
2699 set_final_data_size()
2701 if (this->header_ent_cnt_ != 0)
2702 this->make_header();
2703 Output_data_got<size, big_endian>::set_final_data_size();
2706 // First word of GOT header needs some values that are not
2707 // handled by Output_data_got so poke them in here.
2708 // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase.
2710 do_write(Output_file* of)
2713 if (size == 32 && this->layout_->dynamic_data() != NULL)
2714 val = this->layout_->dynamic_section()->address();
2716 val = this->output_section()->address() + 0x8000;
2717 this->replace_constant(this->header_index_, val);
2718 Output_data_got<size, big_endian>::do_write(of);
2723 reserve_ent(unsigned int cnt = 1)
2725 if (this->header_ent_cnt_ == 0)
2727 if (this->num_entries() + cnt > this->header_index_)
2728 this->make_header();
2734 this->header_ent_cnt_ = 0;
2735 this->header_index_ = this->num_entries();
2738 Output_data_got<size, big_endian>::add_constant(0);
2739 Output_data_got<size, big_endian>::add_constant(0);
2740 Output_data_got<size, big_endian>::add_constant(0);
2742 // Define _GLOBAL_OFFSET_TABLE_ at the header
2743 Symbol *gotsym = this->symtab_->lookup("_GLOBAL_OFFSET_TABLE_", NULL);
2746 Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(gotsym);
2747 sym->set_value(this->g_o_t());
2750 this->symtab_->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL,
2751 Symbol_table::PREDEFINED,
2752 this, this->g_o_t(), 0,
2755 elfcpp::STV_HIDDEN, 0,
2759 Output_data_got<size, big_endian>::add_constant(0);
2762 // Stashed pointers.
2763 Symbol_table* symtab_;
2767 unsigned int header_ent_cnt_;
2768 // GOT header index.
2769 unsigned int header_index_;
2772 // Get the GOT section, creating it if necessary.
2774 template<int size, bool big_endian>
2775 Output_data_got_powerpc<size, big_endian>*
2776 Target_powerpc<size, big_endian>::got_section(Symbol_table* symtab,
2779 if (this->got_ == NULL)
2781 gold_assert(symtab != NULL && layout != NULL);
2784 = new Output_data_got_powerpc<size, big_endian>(symtab, layout);
2786 layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS,
2787 elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE,
2788 this->got_, ORDER_DATA, false);
2794 // Get the dynamic reloc section, creating it if necessary.
2796 template<int size, bool big_endian>
2797 typename Target_powerpc<size, big_endian>::Reloc_section*
2798 Target_powerpc<size, big_endian>::rela_dyn_section(Layout* layout)
2800 if (this->rela_dyn_ == NULL)
2802 gold_assert(layout != NULL);
2803 this->rela_dyn_ = new Reloc_section(parameters->options().combreloc());
2804 layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA,
2805 elfcpp::SHF_ALLOC, this->rela_dyn_,
2806 ORDER_DYNAMIC_RELOCS, false);
2808 return this->rela_dyn_;
2811 // Similarly, but for ifunc symbols get the one for ifunc.
2813 template<int size, bool big_endian>
2814 typename Target_powerpc<size, big_endian>::Reloc_section*
2815 Target_powerpc<size, big_endian>::rela_dyn_section(Symbol_table* symtab,
2820 return this->rela_dyn_section(layout);
2822 if (this->iplt_ == NULL)
2823 this->make_iplt_section(symtab, layout);
2824 return this->iplt_->rel_plt();
2830 // Determine the stub group size. The group size is the absolute
2831 // value of the parameter --stub-group-size. If --stub-group-size
2832 // is passed a negative value, we restrict stubs to be always after
2833 // the stubbed branches.
2834 Stub_control(int32_t size, bool no_size_errors, bool multi_os)
2835 : stub_group_size_(abs(size)), stubs_always_after_branch_(size < 0),
2836 suppress_size_errors_(no_size_errors), multi_os_(multi_os),
2837 state_(NO_GROUP), group_size_(0), group_start_addr_(0),
2838 owner_(NULL), output_section_(NULL)
2842 // Return true iff input section can be handled by current stub
2845 can_add_to_stub_group(Output_section* o,
2846 const Output_section::Input_section* i,
2849 const Output_section::Input_section*
2855 { return output_section_; }
2858 set_output_and_owner(Output_section* o,
2859 const Output_section::Input_section* i)
2861 this->output_section_ = o;
2870 // Adding group sections before the stubs.
2871 FINDING_STUB_SECTION,
2872 // Adding group sections after the stubs.
2876 uint32_t stub_group_size_;
2877 bool stubs_always_after_branch_;
2878 bool suppress_size_errors_;
2879 // True if a stub group can serve multiple output sections.
2882 // Current max size of group. Starts at stub_group_size_ but is
2883 // reduced to stub_group_size_/1024 on seeing a section with
2884 // external conditional branches.
2885 uint32_t group_size_;
2886 uint64_t group_start_addr_;
2887 // owner_ and output_section_ specify the section to which stubs are
2888 // attached. The stubs are placed at the end of this section.
2889 const Output_section::Input_section* owner_;
2890 Output_section* output_section_;
2893 // Return true iff input section can be handled by current stub
2894 // group. Sections are presented to this function in order,
2895 // so the first section is the head of the group.
2898 Stub_control::can_add_to_stub_group(Output_section* o,
2899 const Output_section::Input_section* i,
2902 bool whole_sec = o->order() == ORDER_INIT || o->order() == ORDER_FINI;
2904 uint64_t start_addr = o->address();
2907 // .init and .fini sections are pasted together to form a single
2908 // function. We can't be adding stubs in the middle of the function.
2909 this_size = o->data_size();
2912 start_addr += i->relobj()->output_section_offset(i->shndx());
2913 this_size = i->data_size();
2916 uint64_t end_addr = start_addr + this_size;
2917 uint32_t group_size = this->stub_group_size_;
2919 this->group_size_ = group_size = group_size >> 10;
2921 if (this_size > group_size && !this->suppress_size_errors_)
2922 gold_warning(_("%s:%s exceeds group size"),
2923 i->relobj()->name().c_str(),
2924 i->relobj()->section_name(i->shndx()).c_str());
2926 gold_debug(DEBUG_TARGET, "maybe add%s %s:%s size=%#llx total=%#llx",
2927 has14 ? " 14bit" : "",
2928 i->relobj()->name().c_str(),
2929 i->relobj()->section_name(i->shndx()).c_str(),
2930 (long long) this_size,
2931 (this->state_ == NO_GROUP
2933 : (long long) end_addr - this->group_start_addr_));
2935 if (this->state_ == NO_GROUP)
2937 // Only here on very first use of Stub_control
2939 this->output_section_ = o;
2940 this->state_ = FINDING_STUB_SECTION;
2941 this->group_size_ = group_size;
2942 this->group_start_addr_ = start_addr;
2945 else if (!this->multi_os_ && this->output_section_ != o)
2947 else if (this->state_ == HAS_STUB_SECTION)
2949 // Can we add this section, which is after the stubs, to the
2951 if (end_addr - this->group_start_addr_ <= this->group_size_)
2954 else if (this->state_ == FINDING_STUB_SECTION)
2956 if ((whole_sec && this->output_section_ == o)
2957 || end_addr - this->group_start_addr_ <= this->group_size_)
2959 // Stubs are added at the end of "owner_".
2961 this->output_section_ = o;
2964 // The group before the stubs has reached maximum size.
2965 // Now see about adding sections after the stubs to the
2966 // group. If the current section has a 14-bit branch and
2967 // the group before the stubs exceeds group_size_ (because
2968 // they didn't have 14-bit branches), don't add sections
2969 // after the stubs: The size of stubs for such a large
2970 // group may exceed the reach of a 14-bit branch.
2971 if (!this->stubs_always_after_branch_
2972 && this_size <= this->group_size_
2973 && start_addr - this->group_start_addr_ <= this->group_size_)
2975 gold_debug(DEBUG_TARGET, "adding after stubs");
2976 this->state_ = HAS_STUB_SECTION;
2977 this->group_start_addr_ = start_addr;
2984 gold_debug(DEBUG_TARGET,
2985 !this->multi_os_ && this->output_section_ != o
2986 ? "nope, new output section\n"
2987 : "nope, didn't fit\n");
2989 // The section fails to fit in the current group. Set up a few
2990 // things for the next group. owner_ and output_section_ will be
2991 // set later after we've retrieved those values for the current
2993 this->state_ = FINDING_STUB_SECTION;
2994 this->group_size_ = group_size;
2995 this->group_start_addr_ = start_addr;
2999 // Look over all the input sections, deciding where to place stubs.
3001 template<int size, bool big_endian>
3003 Target_powerpc<size, big_endian>::group_sections(Layout* layout,
3005 bool no_size_errors)
3007 Stub_control stub_control(this->stub_group_size_, no_size_errors,
3008 parameters->options().stub_group_multi());
3010 // Group input sections and insert stub table
3011 Stub_table_owner* table_owner = NULL;
3012 std::vector<Stub_table_owner*> tables;
3013 Layout::Section_list section_list;
3014 layout->get_executable_sections(§ion_list);
3015 std::stable_sort(section_list.begin(), section_list.end(), Sort_sections());
3016 for (Layout::Section_list::iterator o = section_list.begin();
3017 o != section_list.end();
3020 typedef Output_section::Input_section_list Input_section_list;
3021 for (Input_section_list::const_iterator i
3022 = (*o)->input_sections().begin();
3023 i != (*o)->input_sections().end();
3026 if (i->is_input_section()
3027 || i->is_relaxed_input_section())
3029 Powerpc_relobj<size, big_endian>* ppcobj = static_cast
3030 <Powerpc_relobj<size, big_endian>*>(i->relobj());
3031 bool has14 = ppcobj->has_14bit_branch(i->shndx());
3032 if (!stub_control.can_add_to_stub_group(*o, &*i, has14))
3034 table_owner->output_section = stub_control.output_section();
3035 table_owner->owner = stub_control.owner();
3036 stub_control.set_output_and_owner(*o, &*i);
3039 if (table_owner == NULL)
3041 table_owner = new Stub_table_owner;
3042 tables.push_back(table_owner);
3044 ppcobj->set_stub_table(i->shndx(), tables.size() - 1);
3048 if (table_owner != NULL)
3050 table_owner->output_section = stub_control.output_section();
3051 table_owner->owner = stub_control.owner();;
3053 for (typename std::vector<Stub_table_owner*>::iterator t = tables.begin();
3057 Stub_table<size, big_endian>* stub_table;
3059 if ((*t)->owner->is_input_section())
3060 stub_table = new Stub_table<size, big_endian>(this,
3061 (*t)->output_section,
3063 this->stub_tables_.size());
3064 else if ((*t)->owner->is_relaxed_input_section())
3065 stub_table = static_cast<Stub_table<size, big_endian>*>(
3066 (*t)->owner->relaxed_input_section());
3069 this->stub_tables_.push_back(stub_table);
3074 static unsigned long
3075 max_branch_delta (unsigned int r_type)
3077 if (r_type == elfcpp::R_POWERPC_REL14
3078 || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN
3079 || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN)
3081 if (r_type == elfcpp::R_POWERPC_REL24
3082 || r_type == elfcpp::R_PPC_PLTREL24
3083 || r_type == elfcpp::R_PPC_LOCAL24PC)
3088 // Return whether this branch is going via a plt call stub.
3090 template<int size, bool big_endian>
3092 Target_powerpc<size, big_endian>::Branch_info::mark_pltcall(
3093 Powerpc_relobj<size, big_endian>* ppc_object,
3096 Target_powerpc* target,
3097 Symbol_table* symtab)
3099 if (this->object_ != ppc_object
3100 || this->shndx_ != shndx
3101 || this->offset_ != offset)
3104 Symbol* sym = this->object_->global_symbol(this->r_sym_);
3105 if (sym != NULL && sym->is_forwarder())
3106 sym = symtab->resolve_forwards(sym);
3107 if (target->replace_tls_get_addr(sym))
3108 sym = target->tls_get_addr_opt();
3109 const Sized_symbol<size>* gsym = static_cast<const Sized_symbol<size>*>(sym);
3111 ? (gsym->use_plt_offset(Scan::get_reference_flags(this->r_type_, target))
3112 && !target->is_elfv2_localentry0(gsym))
3113 : (this->object_->local_has_plt_offset(this->r_sym_)
3114 && !target->is_elfv2_localentry0(this->object_, this->r_sym_)))
3122 // If this branch needs a plt call stub, or a long branch stub, make one.
3124 template<int size, bool big_endian>
3126 Target_powerpc<size, big_endian>::Branch_info::make_stub(
3127 Stub_table<size, big_endian>* stub_table,
3128 Stub_table<size, big_endian>* ifunc_stub_table,
3129 Symbol_table* symtab) const
3131 Symbol* sym = this->object_->global_symbol(this->r_sym_);
3132 Target_powerpc<size, big_endian>* target =
3133 static_cast<Target_powerpc<size, big_endian>*>(
3134 parameters->sized_target<size, big_endian>());
3135 if (sym != NULL && sym->is_forwarder())
3136 sym = symtab->resolve_forwards(sym);
3137 if (target->replace_tls_get_addr(sym))
3138 sym = target->tls_get_addr_opt();
3139 const Sized_symbol<size>* gsym = static_cast<const Sized_symbol<size>*>(sym);
3143 ? gsym->use_plt_offset(Scan::get_reference_flags(this->r_type_, target))
3144 : this->object_->local_has_plt_offset(this->r_sym_))
3148 && target->abiversion() >= 2
3149 && !parameters->options().output_is_position_independent()
3150 && !is_branch_reloc(this->r_type_))
3151 target->glink_section()->add_global_entry(gsym);
3154 if (stub_table == NULL
3157 && !parameters->options().output_is_position_independent()
3158 && !is_branch_reloc(this->r_type_)))
3159 stub_table = this->object_->stub_table(this->shndx_);
3160 if (stub_table == NULL)
3162 // This is a ref from a data section to an ifunc symbol,
3163 // or a non-branch reloc for which we always want to use
3164 // one set of stubs for resolving function addresses.
3165 stub_table = ifunc_stub_table;
3167 gold_assert(stub_table != NULL);
3168 Address from = this->object_->get_output_section_offset(this->shndx_);
3169 if (from != invalid_address)
3170 from += (this->object_->output_section(this->shndx_)->address()
3173 ok = stub_table->add_plt_call_entry(from,
3174 this->object_, gsym,
3175 this->r_type_, this->addend_,
3178 ok = stub_table->add_plt_call_entry(from,
3179 this->object_, this->r_sym_,
3180 this->r_type_, this->addend_,
3186 Address max_branch_offset = max_branch_delta(this->r_type_);
3187 if (max_branch_offset == 0)
3189 Address from = this->object_->get_output_section_offset(this->shndx_);
3190 gold_assert(from != invalid_address);
3191 from += (this->object_->output_section(this->shndx_)->address()
3196 switch (gsym->source())
3198 case Symbol::FROM_OBJECT:
3200 Object* symobj = gsym->object();
3201 if (symobj->is_dynamic()
3202 || symobj->pluginobj() != NULL)
3205 unsigned int shndx = gsym->shndx(&is_ordinary);
3206 if (shndx == elfcpp::SHN_UNDEF)
3211 case Symbol::IS_UNDEFINED:
3217 Symbol_table::Compute_final_value_status status;
3218 to = symtab->compute_final_value<size>(gsym, &status);
3219 if (status != Symbol_table::CFVS_OK)
3222 to += this->object_->ppc64_local_entry_offset(gsym);
3226 const Symbol_value<size>* psymval
3227 = this->object_->local_symbol(this->r_sym_);
3228 Symbol_value<size> symval;
3229 if (psymval->is_section_symbol())
3230 symval.set_is_section_symbol();
3231 typedef Sized_relobj_file<size, big_endian> ObjType;
3232 typename ObjType::Compute_final_local_value_status status
3233 = this->object_->compute_final_local_value(this->r_sym_, psymval,
3235 if (status != ObjType::CFLV_OK
3236 || !symval.has_output_value())
3238 to = symval.value(this->object_, 0);
3240 to += this->object_->ppc64_local_entry_offset(this->r_sym_);
3242 if (!(size == 32 && this->r_type_ == elfcpp::R_PPC_PLTREL24))
3243 to += this->addend_;
3244 if (stub_table == NULL)
3245 stub_table = this->object_->stub_table(this->shndx_);
3246 if (size == 64 && target->abiversion() < 2)
3248 unsigned int dest_shndx;
3249 if (!target->symval_for_branch(symtab, gsym, this->object_,
3253 Address delta = to - from;
3254 if (delta + max_branch_offset >= 2 * max_branch_offset)
3256 if (stub_table == NULL)
3258 gold_warning(_("%s:%s: branch in non-executable section,"
3259 " no long branch stub for you"),
3260 this->object_->name().c_str(),
3261 this->object_->section_name(this->shndx_).c_str());
3264 bool save_res = (size == 64
3266 && gsym->source() == Symbol::IN_OUTPUT_DATA
3267 && gsym->output_data() == target->savres_section());
3268 ok = stub_table->add_long_branch_entry(this->object_,
3270 from, to, save_res);
3274 gold_debug(DEBUG_TARGET,
3275 "branch at %s:%s+%#lx\n"
3276 "can't reach stub attached to %s:%s",
3277 this->object_->name().c_str(),
3278 this->object_->section_name(this->shndx_).c_str(),
3279 (unsigned long) this->offset_,
3280 stub_table->relobj()->name().c_str(),
3281 stub_table->relobj()->section_name(stub_table->shndx()).c_str());
3286 // Relaxation hook. This is where we do stub generation.
3288 template<int size, bool big_endian>
3290 Target_powerpc<size, big_endian>::do_relax(int pass,
3291 const Input_objects*,
3292 Symbol_table* symtab,
3296 unsigned int prev_brlt_size = 0;
3300 = this->abiversion() < 2 && parameters->options().plt_thread_safe();
3302 && this->abiversion() < 2
3304 && !parameters->options().user_set_plt_thread_safe())
3306 static const char* const thread_starter[] =
3310 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
3312 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
3313 "mq_notify", "create_timer",
3318 "GOMP_parallel_start",
3319 "GOMP_parallel_loop_static",
3320 "GOMP_parallel_loop_static_start",
3321 "GOMP_parallel_loop_dynamic",
3322 "GOMP_parallel_loop_dynamic_start",
3323 "GOMP_parallel_loop_guided",
3324 "GOMP_parallel_loop_guided_start",
3325 "GOMP_parallel_loop_runtime",
3326 "GOMP_parallel_loop_runtime_start",
3327 "GOMP_parallel_sections",
3328 "GOMP_parallel_sections_start",
3333 if (parameters->options().shared())
3337 for (unsigned int i = 0;
3338 i < sizeof(thread_starter) / sizeof(thread_starter[0]);
3341 Symbol* sym = symtab->lookup(thread_starter[i], NULL);
3342 thread_safe = (sym != NULL
3344 && sym->in_real_elf());
3350 this->plt_thread_safe_ = thread_safe;
3355 this->stub_group_size_ = parameters->options().stub_group_size();
3356 bool no_size_errors = true;
3357 if (this->stub_group_size_ == 1)
3358 this->stub_group_size_ = 0x1c00000;
3359 else if (this->stub_group_size_ == -1)
3360 this->stub_group_size_ = -0x1e00000;
3362 no_size_errors = false;
3363 this->group_sections(layout, task, no_size_errors);
3365 else if (this->relax_failed_ && this->relax_fail_count_ < 3)
3367 this->branch_lookup_table_.clear();
3368 for (typename Stub_tables::iterator p = this->stub_tables_.begin();
3369 p != this->stub_tables_.end();
3372 (*p)->clear_stubs(true);
3374 this->stub_tables_.clear();
3375 this->stub_group_size_ = this->stub_group_size_ / 4 * 3;
3376 gold_info(_("%s: stub group size is too large; retrying with %#x"),
3377 program_name, this->stub_group_size_);
3378 this->group_sections(layout, task, true);
3381 // We need address of stub tables valid for make_stub.
3382 for (typename Stub_tables::iterator p = this->stub_tables_.begin();
3383 p != this->stub_tables_.end();
3386 const Powerpc_relobj<size, big_endian>* object
3387 = static_cast<const Powerpc_relobj<size, big_endian>*>((*p)->relobj());
3388 Address off = object->get_output_section_offset((*p)->shndx());
3389 gold_assert(off != invalid_address);
3390 Output_section* os = (*p)->output_section();
3391 (*p)->set_address_and_size(os, off);
3396 // Clear plt call stubs, long branch stubs and branch lookup table.
3397 prev_brlt_size = this->branch_lookup_table_.size();
3398 this->branch_lookup_table_.clear();
3399 for (typename Stub_tables::iterator p = this->stub_tables_.begin();
3400 p != this->stub_tables_.end();
3403 (*p)->clear_stubs(false);
3407 // Build all the stubs.
3408 this->relax_failed_ = false;
3409 Stub_table<size, big_endian>* ifunc_stub_table
3410 = this->stub_tables_.size() == 0 ? NULL : this->stub_tables_[0];
3411 Stub_table<size, big_endian>* one_stub_table
3412 = this->stub_tables_.size() != 1 ? NULL : ifunc_stub_table;
3413 for (typename Branches::const_iterator b = this->branch_info_.begin();
3414 b != this->branch_info_.end();
3417 if (!b->make_stub(one_stub_table, ifunc_stub_table, symtab)
3418 && !this->relax_failed_)
3420 this->relax_failed_ = true;
3421 this->relax_fail_count_++;
3422 if (this->relax_fail_count_ < 3)
3427 // Did anything change size?
3428 unsigned int num_huge_branches = this->branch_lookup_table_.size();
3429 bool again = num_huge_branches != prev_brlt_size;
3430 if (size == 64 && num_huge_branches != 0)
3431 this->make_brlt_section(layout);
3432 if (size == 64 && again)
3433 this->brlt_section_->set_current_size(num_huge_branches);
3435 for (typename Stub_tables::reverse_iterator p = this->stub_tables_.rbegin();
3436 p != this->stub_tables_.rend();
3438 (*p)->remove_eh_frame(layout);
3440 for (typename Stub_tables::iterator p = this->stub_tables_.begin();
3441 p != this->stub_tables_.end();
3443 (*p)->add_eh_frame(layout);
3445 typedef Unordered_set<Output_section*> Output_sections;
3446 Output_sections os_need_update;
3447 for (typename Stub_tables::iterator p = this->stub_tables_.begin();
3448 p != this->stub_tables_.end();
3451 if ((*p)->size_update())
3454 os_need_update.insert((*p)->output_section());
3458 // Set output section offsets for all input sections in an output
3459 // section that just changed size. Anything past the stubs will
3461 for (typename Output_sections::iterator p = os_need_update.begin();
3462 p != os_need_update.end();
3465 Output_section* os = *p;
3467 typedef Output_section::Input_section_list Input_section_list;
3468 for (Input_section_list::const_iterator i = os->input_sections().begin();
3469 i != os->input_sections().end();
3472 off = align_address(off, i->addralign());
3473 if (i->is_input_section() || i->is_relaxed_input_section())
3474 i->relobj()->set_section_offset(i->shndx(), off);
3475 if (i->is_relaxed_input_section())
3477 Stub_table<size, big_endian>* stub_table
3478 = static_cast<Stub_table<size, big_endian>*>(
3479 i->relaxed_input_section());
3480 Address stub_table_size = stub_table->set_address_and_size(os, off);
3481 off += stub_table_size;
3482 // After a few iterations, set current stub table size
3483 // as min size threshold, so later stub tables can only
3486 stub_table->set_min_size_threshold(stub_table_size);
3489 off += i->data_size();
3491 // If .branch_lt is part of this output section, then we have
3492 // just done the offset adjustment.
3493 os->clear_section_offsets_need_adjustment();
3498 && num_huge_branches != 0
3499 && parameters->options().output_is_position_independent())
3501 // Fill in the BRLT relocs.
3502 this->brlt_section_->reset_brlt_sizes();
3503 for (typename Branch_lookup_table::const_iterator p
3504 = this->branch_lookup_table_.begin();
3505 p != this->branch_lookup_table_.end();
3508 this->brlt_section_->add_reloc(p->first, p->second);
3510 this->brlt_section_->finalize_brlt_sizes();
3514 && (parameters->options().user_set_emit_stub_syms()
3515 ? parameters->options().emit_stub_syms()
3517 || parameters->options().output_is_position_independent()
3518 || parameters->options().emit_relocs())))
3520 for (typename Stub_tables::iterator p = this->stub_tables_.begin();
3521 p != this->stub_tables_.end();
3523 (*p)->define_stub_syms(symtab);
3525 if (this->glink_ != NULL)
3527 int stub_size = this->glink_->pltresolve_size();
3528 Address value = -stub_size;
3534 this->define_local(symtab, "__glink_PLTresolve",
3535 this->glink_, value, stub_size);
3538 this->define_local(symtab, "__glink", this->glink_, 0, 0);
3545 template<int size, bool big_endian>
3547 Target_powerpc<size, big_endian>::do_plt_fde_location(const Output_data* plt,
3548 unsigned char* oview,
3552 uint64_t address = plt->address();
3553 off_t len = plt->data_size();
3555 if (plt == this->glink_)
3557 // See Output_data_glink::do_write() for glink contents.
3560 gold_assert(parameters->doing_static_link());
3561 // Static linking may need stubs, to support ifunc and long
3562 // branches. We need to create an output section for
3563 // .eh_frame early in the link process, to have a place to
3564 // attach stub .eh_frame info. We also need to have
3565 // registered a CIE that matches the stub CIE. Both of
3566 // these requirements are satisfied by creating an FDE and
3567 // CIE for .glink, even though static linking will leave
3568 // .glink zero length.
3569 // ??? Hopefully generating an FDE with a zero address range
3570 // won't confuse anything that consumes .eh_frame info.
3572 else if (size == 64)
3574 // There is one word before __glink_PLTresolve
3578 else if (parameters->options().output_is_position_independent())
3580 // There are two FDEs for a position independent glink.
3581 // The first covers the branch table, the second
3582 // __glink_PLTresolve at the end of glink.
3583 off_t resolve_size = this->glink_->pltresolve_size();
3584 if (oview[9] == elfcpp::DW_CFA_nop)
3585 len -= resolve_size;
3588 address += len - resolve_size;
3595 // Must be a stub table.
3596 const Stub_table<size, big_endian>* stub_table
3597 = static_cast<const Stub_table<size, big_endian>*>(plt);
3598 uint64_t stub_address = stub_table->stub_address();
3599 len -= stub_address - address;
3600 address = stub_address;
3603 *paddress = address;
3607 // A class to handle the PLT data.
3609 template<int size, bool big_endian>
3610 class Output_data_plt_powerpc : public Output_section_data_build
3613 typedef Output_data_reloc<elfcpp::SHT_RELA, true,
3614 size, big_endian> Reloc_section;
3616 Output_data_plt_powerpc(Target_powerpc<size, big_endian>* targ,
3617 Reloc_section* plt_rel,
3619 : Output_section_data_build(size == 32 ? 4 : 8),
3625 // Add an entry to the PLT.
3630 add_ifunc_entry(Symbol*);
3633 add_local_ifunc_entry(Sized_relobj_file<size, big_endian>*, unsigned int);
3635 // Return the .rela.plt section data.
3642 // Return the number of PLT entries.
3646 if (this->current_data_size() == 0)
3648 return ((this->current_data_size() - this->first_plt_entry_offset())
3649 / this->plt_entry_size());
3654 do_adjust_output_section(Output_section* os)
3659 // Write to a map file.
3661 do_print_to_mapfile(Mapfile* mapfile) const
3662 { mapfile->print_output_data(this, this->name_); }
3665 // Return the offset of the first non-reserved PLT entry.
3667 first_plt_entry_offset() const
3669 // IPLT has no reserved entry.
3670 if (this->name_[3] == 'I')
3672 return this->targ_->first_plt_entry_offset();
3675 // Return the size of each PLT entry.
3677 plt_entry_size() const
3679 return this->targ_->plt_entry_size();
3682 // Write out the PLT data.
3684 do_write(Output_file*);
3686 // The reloc section.
3687 Reloc_section* rel_;
3688 // Allows access to .glink for do_write.
3689 Target_powerpc<size, big_endian>* targ_;
3690 // What to report in map file.
3694 // Add an entry to the PLT.
3696 template<int size, bool big_endian>
3698 Output_data_plt_powerpc<size, big_endian>::add_entry(Symbol* gsym)
3700 if (!gsym->has_plt_offset())
3702 section_size_type off = this->current_data_size();
3704 off += this->first_plt_entry_offset();
3705 gsym->set_plt_offset(off);
3706 gsym->set_needs_dynsym_entry();
3707 unsigned int dynrel = elfcpp::R_POWERPC_JMP_SLOT;
3708 this->rel_->add_global(gsym, dynrel, this, off, 0);
3709 off += this->plt_entry_size();
3710 this->set_current_data_size(off);
3714 // Add an entry for a global ifunc symbol that resolves locally, to the IPLT.
3716 template<int size, bool big_endian>
3718 Output_data_plt_powerpc<size, big_endian>::add_ifunc_entry(Symbol* gsym)
3720 if (!gsym->has_plt_offset())
3722 section_size_type off = this->current_data_size();
3723 gsym->set_plt_offset(off);
3724 unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE;
3725 if (size == 64 && this->targ_->abiversion() < 2)
3726 dynrel = elfcpp::R_PPC64_JMP_IREL;
3727 this->rel_->add_symbolless_global_addend(gsym, dynrel, this, off, 0);
3728 off += this->plt_entry_size();
3729 this->set_current_data_size(off);
3733 // Add an entry for a local ifunc symbol to the IPLT.
3735 template<int size, bool big_endian>
3737 Output_data_plt_powerpc<size, big_endian>::add_local_ifunc_entry(
3738 Sized_relobj_file<size, big_endian>* relobj,
3739 unsigned int local_sym_index)
3741 if (!relobj->local_has_plt_offset(local_sym_index))
3743 section_size_type off = this->current_data_size();
3744 relobj->set_local_plt_offset(local_sym_index, off);
3745 unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE;
3746 if (size == 64 && this->targ_->abiversion() < 2)
3747 dynrel = elfcpp::R_PPC64_JMP_IREL;
3748 this->rel_->add_symbolless_local_addend(relobj, local_sym_index, dynrel,
3750 off += this->plt_entry_size();
3751 this->set_current_data_size(off);
3755 static const uint32_t add_0_11_11 = 0x7c0b5a14;
3756 static const uint32_t add_2_2_11 = 0x7c425a14;
3757 static const uint32_t add_2_2_12 = 0x7c426214;
3758 static const uint32_t add_3_3_2 = 0x7c631214;
3759 static const uint32_t add_3_3_13 = 0x7c636a14;
3760 static const uint32_t add_3_12_2 = 0x7c6c1214;
3761 static const uint32_t add_3_12_13 = 0x7c6c6a14;
3762 static const uint32_t add_11_0_11 = 0x7d605a14;
3763 static const uint32_t add_11_2_11 = 0x7d625a14;
3764 static const uint32_t add_11_11_2 = 0x7d6b1214;
3765 static const uint32_t addi_0_12 = 0x380c0000;
3766 static const uint32_t addi_2_2 = 0x38420000;
3767 static const uint32_t addi_3_3 = 0x38630000;
3768 static const uint32_t addi_11_11 = 0x396b0000;
3769 static const uint32_t addi_12_1 = 0x39810000;
3770 static const uint32_t addi_12_12 = 0x398c0000;
3771 static const uint32_t addis_0_2 = 0x3c020000;
3772 static const uint32_t addis_0_13 = 0x3c0d0000;
3773 static const uint32_t addis_2_12 = 0x3c4c0000;
3774 static const uint32_t addis_11_2 = 0x3d620000;
3775 static const uint32_t addis_11_11 = 0x3d6b0000;
3776 static const uint32_t addis_11_30 = 0x3d7e0000;
3777 static const uint32_t addis_12_1 = 0x3d810000;
3778 static const uint32_t addis_12_2 = 0x3d820000;
3779 static const uint32_t addis_12_12 = 0x3d8c0000;
3780 static const uint32_t b = 0x48000000;
3781 static const uint32_t bcl_20_31 = 0x429f0005;
3782 static const uint32_t bctr = 0x4e800420;
3783 static const uint32_t bctrl = 0x4e800421;
3784 static const uint32_t beqlr = 0x4d820020;
3785 static const uint32_t blr = 0x4e800020;
3786 static const uint32_t bnectr_p4 = 0x4ce20420;
3787 static const uint32_t cmpld_7_12_0 = 0x7fac0040;
3788 static const uint32_t cmpldi_2_0 = 0x28220000;
3789 static const uint32_t cmpdi_11_0 = 0x2c2b0000;
3790 static const uint32_t cmpwi_11_0 = 0x2c0b0000;
3791 static const uint32_t cror_15_15_15 = 0x4def7b82;
3792 static const uint32_t cror_31_31_31 = 0x4ffffb82;
3793 static const uint32_t ld_0_1 = 0xe8010000;
3794 static const uint32_t ld_0_12 = 0xe80c0000;
3795 static const uint32_t ld_2_1 = 0xe8410000;
3796 static const uint32_t ld_2_2 = 0xe8420000;
3797 static const uint32_t ld_2_11 = 0xe84b0000;
3798 static const uint32_t ld_2_12 = 0xe84c0000;
3799 static const uint32_t ld_11_1 = 0xe9610000;
3800 static const uint32_t ld_11_2 = 0xe9620000;
3801 static const uint32_t ld_11_3 = 0xe9630000;
3802 static const uint32_t ld_11_11 = 0xe96b0000;
3803 static const uint32_t ld_12_2 = 0xe9820000;
3804 static const uint32_t ld_12_3 = 0xe9830000;
3805 static const uint32_t ld_12_11 = 0xe98b0000;
3806 static const uint32_t ld_12_12 = 0xe98c0000;
3807 static const uint32_t lfd_0_1 = 0xc8010000;
3808 static const uint32_t li_0_0 = 0x38000000;
3809 static const uint32_t li_12_0 = 0x39800000;
3810 static const uint32_t lis_0 = 0x3c000000;
3811 static const uint32_t lis_2 = 0x3c400000;
3812 static const uint32_t lis_11 = 0x3d600000;
3813 static const uint32_t lis_12 = 0x3d800000;
3814 static const uint32_t lvx_0_12_0 = 0x7c0c00ce;
3815 static const uint32_t lwz_0_12 = 0x800c0000;
3816 static const uint32_t lwz_11_3 = 0x81630000;
3817 static const uint32_t lwz_11_11 = 0x816b0000;
3818 static const uint32_t lwz_11_30 = 0x817e0000;
3819 static const uint32_t lwz_12_3 = 0x81830000;
3820 static const uint32_t lwz_12_12 = 0x818c0000;
3821 static const uint32_t lwzu_0_12 = 0x840c0000;
3822 static const uint32_t mflr_0 = 0x7c0802a6;
3823 static const uint32_t mflr_11 = 0x7d6802a6;
3824 static const uint32_t mflr_12 = 0x7d8802a6;
3825 static const uint32_t mr_0_3 = 0x7c601b78;
3826 static const uint32_t mr_3_0 = 0x7c030378;
3827 static const uint32_t mtctr_0 = 0x7c0903a6;
3828 static const uint32_t mtctr_11 = 0x7d6903a6;
3829 static const uint32_t mtctr_12 = 0x7d8903a6;
3830 static const uint32_t mtlr_0 = 0x7c0803a6;
3831 static const uint32_t mtlr_11 = 0x7d6803a6;
3832 static const uint32_t mtlr_12 = 0x7d8803a6;
3833 static const uint32_t nop = 0x60000000;
3834 static const uint32_t ori_0_0_0 = 0x60000000;
3835 static const uint32_t srdi_0_0_2 = 0x7800f082;
3836 static const uint32_t std_0_1 = 0xf8010000;
3837 static const uint32_t std_0_12 = 0xf80c0000;
3838 static const uint32_t std_2_1 = 0xf8410000;
3839 static const uint32_t std_11_1 = 0xf9610000;
3840 static const uint32_t stfd_0_1 = 0xd8010000;
3841 static const uint32_t stvx_0_12_0 = 0x7c0c01ce;
3842 static const uint32_t sub_11_11_12 = 0x7d6c5850;
3843 static const uint32_t sub_12_12_11 = 0x7d8b6050;
3844 static const uint32_t xor_2_12_12 = 0x7d826278;
3845 static const uint32_t xor_11_12_12 = 0x7d8b6278;
3847 // Write out the PLT.
3849 template<int size, bool big_endian>
3851 Output_data_plt_powerpc<size, big_endian>::do_write(Output_file* of)
3853 if (size == 32 && this->name_[3] != 'I')
3855 const section_size_type offset = this->offset();
3856 const section_size_type oview_size
3857 = convert_to_section_size_type(this->data_size());
3858 unsigned char* const oview = of->get_output_view(offset, oview_size);
3859 unsigned char* pov = oview;
3860 unsigned char* endpov = oview + oview_size;
3862 // The address of the .glink branch table
3863 const Output_data_glink<size, big_endian>* glink
3864 = this->targ_->glink_section();
3865 elfcpp::Elf_types<32>::Elf_Addr branch_tab = glink->address();
3867 while (pov < endpov)
3869 elfcpp::Swap<32, big_endian>::writeval(pov, branch_tab);
3874 of->write_output_view(offset, oview_size, oview);
3878 // Create the PLT section.
3880 template<int size, bool big_endian>
3882 Target_powerpc<size, big_endian>::make_plt_section(Symbol_table* symtab,
3885 if (this->plt_ == NULL)
3887 if (this->got_ == NULL)
3888 this->got_section(symtab, layout);
3890 if (this->glink_ == NULL)
3891 make_glink_section(layout);
3893 // Ensure that .rela.dyn always appears before .rela.plt This is
3894 // necessary due to how, on PowerPC and some other targets, .rela.dyn
3895 // needs to include .rela.plt in its range.
3896 this->rela_dyn_section(layout);
3898 Reloc_section* plt_rel = new Reloc_section(false);
3899 layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA,
3900 elfcpp::SHF_ALLOC, plt_rel,
3901 ORDER_DYNAMIC_PLT_RELOCS, false);
3903 = new Output_data_plt_powerpc<size, big_endian>(this, plt_rel,
3905 layout->add_output_section_data(".plt",
3907 ? elfcpp::SHT_PROGBITS
3908 : elfcpp::SHT_NOBITS),
3909 elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE,
3916 Output_section* rela_plt_os = plt_rel->output_section();
3917 rela_plt_os->set_info_section(this->plt_->output_section());
3921 // Create the IPLT section.
3923 template<int size, bool big_endian>
3925 Target_powerpc<size, big_endian>::make_iplt_section(Symbol_table* symtab,
3928 if (this->iplt_ == NULL)
3930 this->make_plt_section(symtab, layout);
3932 Reloc_section* iplt_rel = new Reloc_section(false);
3933 if (this->rela_dyn_->output_section())
3934 this->rela_dyn_->output_section()->add_output_section_data(iplt_rel);
3936 = new Output_data_plt_powerpc<size, big_endian>(this, iplt_rel,
3938 if (this->plt_->output_section())
3939 this->plt_->output_section()->add_output_section_data(this->iplt_);
3943 // A section for huge long branch addresses, similar to plt section.
3945 template<int size, bool big_endian>
3946 class Output_data_brlt_powerpc : public Output_section_data_build
3949 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
3950 typedef Output_data_reloc<elfcpp::SHT_RELA, true,
3951 size, big_endian> Reloc_section;
3953 Output_data_brlt_powerpc(Target_powerpc<size, big_endian>* targ,
3954 Reloc_section* brlt_rel)
3955 : Output_section_data_build(size == 32 ? 4 : 8),
3963 this->reset_data_size();
3964 this->rel_->reset_data_size();
3968 finalize_brlt_sizes()
3970 this->finalize_data_size();
3971 this->rel_->finalize_data_size();
3974 // Add a reloc for an entry in the BRLT.
3976 add_reloc(Address to, unsigned int off)
3977 { this->rel_->add_relative(elfcpp::R_POWERPC_RELATIVE, this, off, to); }
3979 // Update section and reloc section size.
3981 set_current_size(unsigned int num_branches)
3983 this->reset_address_and_file_offset();
3984 this->set_current_data_size(num_branches * 16);
3985 this->finalize_data_size();
3986 Output_section* os = this->output_section();
3987 os->set_section_offsets_need_adjustment();
3988 if (this->rel_ != NULL)
3990 const unsigned int reloc_size = elfcpp::Elf_sizes<size>::rela_size;
3991 this->rel_->reset_address_and_file_offset();
3992 this->rel_->set_current_data_size(num_branches * reloc_size);
3993 this->rel_->finalize_data_size();
3994 Output_section* os = this->rel_->output_section();
3995 os->set_section_offsets_need_adjustment();
4001 do_adjust_output_section(Output_section* os)
4006 // Write to a map file.
4008 do_print_to_mapfile(Mapfile* mapfile) const
4009 { mapfile->print_output_data(this, "** BRLT"); }
4012 // Write out the BRLT data.
4014 do_write(Output_file*);
4016 // The reloc section.
4017 Reloc_section* rel_;
4018 Target_powerpc<size, big_endian>* targ_;
4021 // Make the branch lookup table section.
4023 template<int size, bool big_endian>
4025 Target_powerpc<size, big_endian>::make_brlt_section(Layout* layout)
4027 if (size == 64 && this->brlt_section_ == NULL)
4029 Reloc_section* brlt_rel = NULL;
4030 bool is_pic = parameters->options().output_is_position_independent();
4033 // When PIC we can't fill in .branch_lt (like .plt it can be
4034 // a bss style section) but must initialise at runtime via
4035 // dynamic relocations.
4036 this->rela_dyn_section(layout);
4037 brlt_rel = new Reloc_section(false);
4038 if (this->rela_dyn_->output_section())
4039 this->rela_dyn_->output_section()
4040 ->add_output_section_data(brlt_rel);
4043 = new Output_data_brlt_powerpc<size, big_endian>(this, brlt_rel);
4044 if (this->plt_ && is_pic && this->plt_->output_section())
4045 this->plt_->output_section()
4046 ->add_output_section_data(this->brlt_section_);
4048 layout->add_output_section_data(".branch_lt",
4049 (is_pic ? elfcpp::SHT_NOBITS
4050 : elfcpp::SHT_PROGBITS),
4051 elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE,
4052 this->brlt_section_,
4053 (is_pic ? ORDER_SMALL_BSS
4054 : ORDER_SMALL_DATA),
4059 // Write out .branch_lt when non-PIC.
4061 template<int size, bool big_endian>
4063 Output_data_brlt_powerpc<size, big_endian>::do_write(Output_file* of)
4065 if (size == 64 && !parameters->options().output_is_position_independent())
4067 const section_size_type offset = this->offset();
4068 const section_size_type oview_size
4069 = convert_to_section_size_type(this->data_size());
4070 unsigned char* const oview = of->get_output_view(offset, oview_size);
4072 this->targ_->write_branch_lookup_table(oview);
4073 of->write_output_view(offset, oview_size, oview);
4077 static inline uint32_t
4083 static inline uint32_t
4089 static inline uint32_t
4092 return hi(a + 0x8000);
4098 static const unsigned char eh_frame_cie[12];
4102 const unsigned char Eh_cie<size>::eh_frame_cie[] =
4105 'z', 'R', 0, // Augmentation string.
4106 4, // Code alignment.
4107 0x80 - size / 8 , // Data alignment.
4109 1, // Augmentation size.
4110 (elfcpp::DW_EH_PE_pcrel
4111 | elfcpp::DW_EH_PE_sdata4), // FDE encoding.
4112 elfcpp::DW_CFA_def_cfa, 1, 0 // def_cfa: r1 offset 0.
4115 // Describe __glink_PLTresolve use of LR, 64-bit version ABIv1.
4116 static const unsigned char glink_eh_frame_fde_64v1[] =
4118 0, 0, 0, 0, // Replaced with offset to .glink.
4119 0, 0, 0, 0, // Replaced with size of .glink.
4120 0, // Augmentation size.
4121 elfcpp::DW_CFA_advance_loc + 1,
4122 elfcpp::DW_CFA_register, 65, 12,
4123 elfcpp::DW_CFA_advance_loc + 5,
4124 elfcpp::DW_CFA_restore_extended, 65
4127 // Describe __glink_PLTresolve use of LR, 64-bit version ABIv2.
4128 static const unsigned char glink_eh_frame_fde_64v2[] =
4130 0, 0, 0, 0, // Replaced with offset to .glink.
4131 0, 0, 0, 0, // Replaced with size of .glink.
4132 0, // Augmentation size.
4133 elfcpp::DW_CFA_advance_loc + 1,
4134 elfcpp::DW_CFA_register, 65, 0,
4135 elfcpp::DW_CFA_advance_loc + 7,
4136 elfcpp::DW_CFA_restore_extended, 65
4139 // Describe __glink_PLTresolve use of LR, 32-bit version.
4140 static const unsigned char glink_eh_frame_fde_32[] =
4142 0, 0, 0, 0, // Replaced with offset to .glink.
4143 0, 0, 0, 0, // Replaced with size of .glink.
4144 0, // Augmentation size.
4145 elfcpp::DW_CFA_advance_loc + 2,
4146 elfcpp::DW_CFA_register, 65, 0,
4147 elfcpp::DW_CFA_advance_loc + 4,
4148 elfcpp::DW_CFA_restore_extended, 65
4151 static const unsigned char default_fde[] =
4153 0, 0, 0, 0, // Replaced with offset to stubs.
4154 0, 0, 0, 0, // Replaced with size of stubs.
4155 0, // Augmentation size.
4156 elfcpp::DW_CFA_nop, // Pad.
4161 template<bool big_endian>
4163 write_insn(unsigned char* p, uint32_t v)
4165 elfcpp::Swap<32, big_endian>::writeval(p, v);
4169 static inline unsigned int
4172 if (!parameters->options().user_set_plt_align())
4173 return size == 64 ? 32 : 8;
4174 return 1 << parameters->options().plt_align();
4177 // Stub_table holds information about plt and long branch stubs.
4178 // Stubs are built in an area following some input section determined
4179 // by group_sections(). This input section is converted to a relaxed
4180 // input section allowing it to be resized to accommodate the stubs
4182 template<int size, bool big_endian>
4183 class Stub_table : public Output_relaxed_input_section
4188 Plt_stub_ent(unsigned int off, unsigned int indx)
4189 : off_(off), indx_(indx), r2save_(0), localentry0_(0)
4193 unsigned int indx_ : 30;
4194 unsigned int r2save_ : 1;
4195 unsigned int localentry0_ : 1;
4197 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
4198 static const Address invalid_address = static_cast<Address>(0) - 1;
4200 Stub_table(Target_powerpc<size, big_endian>* targ,
4201 Output_section* output_section,
4202 const Output_section::Input_section* owner,
4204 : Output_relaxed_input_section(owner->relobj(), owner->shndx(),
4206 ->section_addralign(owner->shndx())),
4207 targ_(targ), plt_call_stubs_(), long_branch_stubs_(),
4208 orig_data_size_(owner->current_data_size()),
4209 plt_size_(0), last_plt_size_(0),
4210 branch_size_(0), last_branch_size_(0), min_size_threshold_(0),
4211 need_save_res_(false), uniq_(id), tls_get_addr_opt_bctrl_(-1u),
4214 this->set_output_section(output_section);
4216 std::vector<Output_relaxed_input_section*> new_relaxed;
4217 new_relaxed.push_back(this);
4218 output_section->convert_input_sections_to_relaxed_sections(new_relaxed);
4221 // Add a plt call stub.
4223 add_plt_call_entry(Address,
4224 const Sized_relobj_file<size, big_endian>*,
4231 add_plt_call_entry(Address,
4232 const Sized_relobj_file<size, big_endian>*,
4238 // Find a given plt call stub.
4240 find_plt_call_entry(const Symbol*) const;
4243 find_plt_call_entry(const Sized_relobj_file<size, big_endian>*,
4244 unsigned int) const;
4247 find_plt_call_entry(const Sized_relobj_file<size, big_endian>*,
4253 find_plt_call_entry(const Sized_relobj_file<size, big_endian>*,
4258 // Add a long branch stub.
4260 add_long_branch_entry(const Powerpc_relobj<size, big_endian>*,
4261 unsigned int, Address, Address, bool);
4264 find_long_branch_entry(const Powerpc_relobj<size, big_endian>*,
4268 can_reach_stub(Address from, unsigned int off, unsigned int r_type)
4270 Address max_branch_offset = max_branch_delta(r_type);
4271 if (max_branch_offset == 0)
4273 gold_assert(from != invalid_address);
4274 Address loc = off + this->stub_address();
4275 return loc - from + max_branch_offset < 2 * max_branch_offset;
4279 clear_stubs(bool all)
4281 this->plt_call_stubs_.clear();
4282 this->plt_size_ = 0;
4283 this->long_branch_stubs_.clear();
4284 this->branch_size_ = 0;
4285 this->need_save_res_ = false;
4288 this->last_plt_size_ = 0;
4289 this->last_branch_size_ = 0;
4294 set_address_and_size(const Output_section* os, Address off)
4296 Address start_off = off;
4297 off += this->orig_data_size_;
4298 Address my_size = this->plt_size_ + this->branch_size_;
4299 if (this->need_save_res_)
4300 my_size += this->targ_->savres_section()->data_size();
4302 off = align_address(off, this->stub_align());
4303 // Include original section size and alignment padding in size
4304 my_size += off - start_off;
4305 // Ensure new size is always larger than min size
4306 // threshold. Alignment requirement is included in "my_size", so
4307 // increase "my_size" does not invalidate alignment.
4308 if (my_size < this->min_size_threshold_)
4309 my_size = this->min_size_threshold_;
4310 this->reset_address_and_file_offset();
4311 this->set_current_data_size(my_size);
4312 this->set_address_and_file_offset(os->address() + start_off,
4313 os->offset() + start_off);
4318 stub_address() const
4320 return align_address(this->address() + this->orig_data_size_,
4321 this->stub_align());
4327 return align_address(this->offset() + this->orig_data_size_,
4328 this->stub_align());
4333 { return this->plt_size_; }
4336 set_min_size_threshold(Address min_size)
4337 { this->min_size_threshold_ = min_size; }
4340 define_stub_syms(Symbol_table*);
4345 Output_section* os = this->output_section();
4346 if (os->addralign() < this->stub_align())
4348 os->set_addralign(this->stub_align());
4349 // FIXME: get rid of the insane checkpointing.
4350 // We can't increase alignment of the input section to which
4351 // stubs are attached; The input section may be .init which
4352 // is pasted together with other .init sections to form a
4353 // function. Aligning might insert zero padding resulting in
4354 // sigill. However we do need to increase alignment of the
4355 // output section so that the align_address() on offset in
4356 // set_address_and_size() adds the same padding as the
4357 // align_address() on address in stub_address().
4358 // What's more, we need this alignment for the layout done in
4359 // relaxation_loop_body() so that the output section starts at
4360 // a suitably aligned address.
4361 os->checkpoint_set_addralign(this->stub_align());
4363 if (this->last_plt_size_ != this->plt_size_
4364 || this->last_branch_size_ != this->branch_size_)
4366 this->last_plt_size_ = this->plt_size_;
4367 this->last_branch_size_ = this->branch_size_;
4373 // Generate a suitable FDE to describe code in this stub group.
4377 // Add .eh_frame info for this stub section.
4379 add_eh_frame(Layout* layout);
4381 // Remove .eh_frame info for this stub section.
4383 remove_eh_frame(Layout* layout);
4385 Target_powerpc<size, big_endian>*
4391 class Plt_stub_key_hash;
4392 typedef Unordered_map<Plt_stub_key, Plt_stub_ent,
4393 Plt_stub_key_hash> Plt_stub_entries;
4394 class Branch_stub_ent;
4395 class Branch_stub_ent_hash;
4396 typedef Unordered_map<Branch_stub_ent, unsigned int,
4397 Branch_stub_ent_hash> Branch_stub_entries;
4399 // Alignment of stub section.
4403 unsigned int min_align = size == 64 ? 32 : 16;
4404 unsigned int user_align = 1 << parameters->options().plt_align();
4405 return std::max(user_align, min_align);
4408 // Return the plt offset for the given call stub.
4410 plt_off(typename Plt_stub_entries::const_iterator p, bool* is_iplt) const
4412 const Symbol* gsym = p->first.sym_;
4415 *is_iplt = (gsym->type() == elfcpp::STT_GNU_IFUNC
4416 && gsym->can_use_relative_reloc(false));
4417 return gsym->plt_offset();
4422 const Sized_relobj_file<size, big_endian>* relobj = p->first.object_;
4423 unsigned int local_sym_index = p->first.locsym_;
4424 return relobj->local_plt_offset(local_sym_index);
4428 // Size of a given plt call stub.
4430 plt_call_size(typename Plt_stub_entries::const_iterator p) const
4434 const Symbol* gsym = p->first.sym_;
4436 + (this->targ_->is_tls_get_addr_opt(gsym) ? 8 * 4 : 0));
4440 Address plt_addr = this->plt_off(p, &is_iplt);
4442 plt_addr += this->targ_->iplt_section()->address();
4444 plt_addr += this->targ_->plt_section()->address();
4445 Address got_addr = this->targ_->got_section()->output_section()->address();
4446 const Powerpc_relobj<size, big_endian>* ppcobj = static_cast
4447 <const Powerpc_relobj<size, big_endian>*>(p->first.object_);
4448 got_addr += ppcobj->toc_base_offset();
4449 Address off = plt_addr - got_addr;
4450 unsigned int bytes = 4 * 4 + 4 * (ha(off) != 0);
4451 const Symbol* gsym = p->first.sym_;
4452 if (this->targ_->is_tls_get_addr_opt(gsym))
4454 if (this->targ_->abiversion() < 2)
4456 bool static_chain = parameters->options().plt_static_chain();
4457 bool thread_safe = this->targ_->plt_thread_safe();
4461 + 4 * (ha(off + 8 + 8 * static_chain) != ha(off)));
4467 plt_call_align(unsigned int bytes) const
4469 unsigned int align = param_plt_align<size>();
4470 return (bytes + align - 1) & -align;
4473 // Return long branch stub size.
4475 branch_stub_size(typename Branch_stub_entries::const_iterator p)
4477 Address loc = this->stub_address() + this->last_plt_size_ + p->second;
4478 if (p->first.dest_ - loc + (1 << 25) < 2 << 25)
4480 unsigned int bytes = 16;
4481 if (size == 32 && parameters->options().output_is_position_independent())
4488 do_write(Output_file*);
4490 // Plt call stub keys.
4494 Plt_stub_key(const Symbol* sym)
4495 : sym_(sym), object_(0), addend_(0), locsym_(0)
4498 Plt_stub_key(const Sized_relobj_file<size, big_endian>* object,
4499 unsigned int locsym_index)
4500 : sym_(NULL), object_(object), addend_(0), locsym_(locsym_index)
4503 Plt_stub_key(const Sized_relobj_file<size, big_endian>* object,
4505 unsigned int r_type,
4507 : sym_(sym), object_(0), addend_(0), locsym_(0)
4510 this->addend_ = addend;
4511 else if (parameters->options().output_is_position_independent()
4512 && r_type == elfcpp::R_PPC_PLTREL24)
4514 this->addend_ = addend;
4515 if (this->addend_ >= 32768)
4516 this->object_ = object;
4520 Plt_stub_key(const Sized_relobj_file<size, big_endian>* object,
4521 unsigned int locsym_index,
4522 unsigned int r_type,
4524 : sym_(NULL), object_(object), addend_(0), locsym_(locsym_index)
4527 this->addend_ = addend;
4528 else if (parameters->options().output_is_position_independent()
4529 && r_type == elfcpp::R_PPC_PLTREL24)
4530 this->addend_ = addend;
4533 bool operator==(const Plt_stub_key& that) const
4535 return (this->sym_ == that.sym_
4536 && this->object_ == that.object_
4537 && this->addend_ == that.addend_
4538 && this->locsym_ == that.locsym_);
4542 const Sized_relobj_file<size, big_endian>* object_;
4543 typename elfcpp::Elf_types<size>::Elf_Addr addend_;
4544 unsigned int locsym_;
4547 class Plt_stub_key_hash
4550 size_t operator()(const Plt_stub_key& ent) const
4552 return (reinterpret_cast<uintptr_t>(ent.sym_)
4553 ^ reinterpret_cast<uintptr_t>(ent.object_)
4559 // Long branch stub keys.
4560 class Branch_stub_ent
4563 Branch_stub_ent(const Powerpc_relobj<size, big_endian>* obj,
4564 Address to, bool save_res)
4565 : dest_(to), toc_base_off_(0), save_res_(save_res)
4568 toc_base_off_ = obj->toc_base_offset();
4571 bool operator==(const Branch_stub_ent& that) const
4573 return (this->dest_ == that.dest_
4575 || this->toc_base_off_ == that.toc_base_off_));
4579 unsigned int toc_base_off_;
4583 class Branch_stub_ent_hash
4586 size_t operator()(const Branch_stub_ent& ent) const
4587 { return ent.dest_ ^ ent.toc_base_off_; }
4590 // In a sane world this would be a global.
4591 Target_powerpc<size, big_endian>* targ_;
4592 // Map sym/object/addend to stub offset.
4593 Plt_stub_entries plt_call_stubs_;
4594 // Map destination address to stub offset.
4595 Branch_stub_entries long_branch_stubs_;
4596 // size of input section
4597 section_size_type orig_data_size_;
4599 section_size_type plt_size_, last_plt_size_, branch_size_, last_branch_size_;
4600 // Some rare cases cause (PR/20529) fluctuation in stub table
4601 // size, which leads to an endless relax loop. This is to be fixed
4602 // by, after the first few iterations, allowing only increase of
4603 // stub table size. This variable sets the minimal possible size of
4604 // a stub table, it is zero for the first few iterations, then
4605 // increases monotonically.
4606 Address min_size_threshold_;
4607 // Set if this stub group needs a copy of out-of-line register
4608 // save/restore functions.
4609 bool need_save_res_;
4610 // Per stub table unique identifier.
4612 // The bctrl in the __tls_get_addr_opt stub, if present.
4613 unsigned int tls_get_addr_opt_bctrl_;
4614 // FDE unwind info for this stub group.
4615 unsigned int plt_fde_len_;
4616 unsigned char plt_fde_[20];
4619 // Add a plt call stub, if we do not already have one for this
4620 // sym/object/addend combo.
4622 template<int size, bool big_endian>
4624 Stub_table<size, big_endian>::add_plt_call_entry(
4626 const Sized_relobj_file<size, big_endian>* object,
4628 unsigned int r_type,
4632 Plt_stub_key key(object, gsym, r_type, addend);
4633 Plt_stub_ent ent(this->plt_size_, this->plt_call_stubs_.size());
4634 std::pair<typename Plt_stub_entries::iterator, bool> p
4635 = this->plt_call_stubs_.insert(std::make_pair(key, ent));
4638 this->plt_size_ = ent.off_ + this->plt_call_size(p.first);
4640 && this->targ_->is_elfv2_localentry0(gsym))
4642 p.first->second.localentry0_ = 1;
4643 this->targ_->set_has_localentry0();
4645 if (this->targ_->is_tls_get_addr_opt(gsym))
4647 this->targ_->set_has_tls_get_addr_opt();
4648 this->tls_get_addr_opt_bctrl_ = this->plt_size_ - 5 * 4;
4650 this->plt_size_ = this->plt_call_align(this->plt_size_);
4654 && !p.first->second.localentry0_)
4655 p.first->second.r2save_ = 1;
4656 return this->can_reach_stub(from, ent.off_, r_type);
4659 template<int size, bool big_endian>
4661 Stub_table<size, big_endian>::add_plt_call_entry(
4663 const Sized_relobj_file<size, big_endian>* object,
4664 unsigned int locsym_index,
4665 unsigned int r_type,
4669 Plt_stub_key key(object, locsym_index, r_type, addend);
4670 Plt_stub_ent ent(this->plt_size_, this->plt_call_stubs_.size());
4671 std::pair<typename Plt_stub_entries::iterator, bool> p
4672 = this->plt_call_stubs_.insert(std::make_pair(key, ent));
4675 this->plt_size_ = ent.off_ + this->plt_call_size(p.first);
4676 this->plt_size_ = this->plt_call_align(this->plt_size_);
4678 && this->targ_->is_elfv2_localentry0(object, locsym_index))
4680 p.first->second.localentry0_ = 1;
4681 this->targ_->set_has_localentry0();
4686 && !p.first->second.localentry0_)
4687 p.first->second.r2save_ = 1;
4688 return this->can_reach_stub(from, ent.off_, r_type);
4691 // Find a plt call stub.
4693 template<int size, bool big_endian>
4694 const typename Stub_table<size, big_endian>::Plt_stub_ent*
4695 Stub_table<size, big_endian>::find_plt_call_entry(
4696 const Sized_relobj_file<size, big_endian>* object,
4698 unsigned int r_type,
4699 Address addend) const
4701 Plt_stub_key key(object, gsym, r_type, addend);
4702 typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(key);
4703 if (p == this->plt_call_stubs_.end())
4708 template<int size, bool big_endian>
4709 const typename Stub_table<size, big_endian>::Plt_stub_ent*
4710 Stub_table<size, big_endian>::find_plt_call_entry(const Symbol* gsym) const
4712 Plt_stub_key key(gsym);
4713 typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(key);
4714 if (p == this->plt_call_stubs_.end())
4719 template<int size, bool big_endian>
4720 const typename Stub_table<size, big_endian>::Plt_stub_ent*
4721 Stub_table<size, big_endian>::find_plt_call_entry(
4722 const Sized_relobj_file<size, big_endian>* object,
4723 unsigned int locsym_index,
4724 unsigned int r_type,
4725 Address addend) const
4727 Plt_stub_key key(object, locsym_index, r_type, addend);
4728 typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(key);
4729 if (p == this->plt_call_stubs_.end())
4734 template<int size, bool big_endian>
4735 const typename Stub_table<size, big_endian>::Plt_stub_ent*
4736 Stub_table<size, big_endian>::find_plt_call_entry(
4737 const Sized_relobj_file<size, big_endian>* object,
4738 unsigned int locsym_index) const
4740 Plt_stub_key key(object, locsym_index);
4741 typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(key);
4742 if (p == this->plt_call_stubs_.end())
4747 // Add a long branch stub if we don't already have one to given
4750 template<int size, bool big_endian>
4752 Stub_table<size, big_endian>::add_long_branch_entry(
4753 const Powerpc_relobj<size, big_endian>* object,
4754 unsigned int r_type,
4759 Branch_stub_ent ent(object, to, save_res);
4760 Address off = this->branch_size_;
4761 std::pair<typename Branch_stub_entries::iterator, bool> p
4762 = this->long_branch_stubs_.insert(std::make_pair(ent, off));
4766 this->need_save_res_ = true;
4769 unsigned int stub_size = this->branch_stub_size(p.first);
4770 this->branch_size_ = off + stub_size;
4771 if (size == 64 && stub_size != 4)
4772 this->targ_->add_branch_lookup_table(to);
4775 return this->can_reach_stub(from, off, r_type);
4778 // Find long branch stub offset.
4780 template<int size, bool big_endian>
4781 typename Stub_table<size, big_endian>::Address
4782 Stub_table<size, big_endian>::find_long_branch_entry(
4783 const Powerpc_relobj<size, big_endian>* object,
4786 Branch_stub_ent ent(object, to, false);
4787 typename Branch_stub_entries::const_iterator p
4788 = this->long_branch_stubs_.find(ent);
4789 if (p == this->long_branch_stubs_.end())
4790 return invalid_address;
4791 if (p->first.save_res_)
4792 return to - this->targ_->savres_section()->address() + this->branch_size_;
4796 // Generate a suitable FDE to describe code in this stub group.
4797 // The __tls_get_addr_opt call stub needs to describe where it saves
4798 // LR, to support exceptions that might be thrown from __tls_get_addr.
4800 template<int size, bool big_endian>
4802 Stub_table<size, big_endian>::init_plt_fde()
4804 unsigned char* p = this->plt_fde_;
4805 // offset pcrel sdata4, size udata4, and augmentation size byte.
4808 if (this->tls_get_addr_opt_bctrl_ != -1u)
4810 unsigned int to_bctrl = this->tls_get_addr_opt_bctrl_ / 4;
4812 *p++ = elfcpp::DW_CFA_advance_loc + to_bctrl;
4813 else if (to_bctrl < 256)
4815 *p++ = elfcpp::DW_CFA_advance_loc1;
4818 else if (to_bctrl < 65536)
4820 *p++ = elfcpp::DW_CFA_advance_loc2;
4821 elfcpp::Swap<16, big_endian>::writeval(p, to_bctrl);
4826 *p++ = elfcpp::DW_CFA_advance_loc4;
4827 elfcpp::Swap<32, big_endian>::writeval(p, to_bctrl);
4830 *p++ = elfcpp::DW_CFA_offset_extended_sf;
4832 *p++ = -(this->targ_->stk_linker() / 8) & 0x7f;
4833 *p++ = elfcpp::DW_CFA_advance_loc + 4;
4834 *p++ = elfcpp::DW_CFA_restore_extended;
4837 this->plt_fde_len_ = p - this->plt_fde_;
4840 // Add .eh_frame info for this stub section. Unlike other linker
4841 // generated .eh_frame this is added late in the link, because we
4842 // only want the .eh_frame info if this particular stub section is
4845 template<int size, bool big_endian>
4847 Stub_table<size, big_endian>::add_eh_frame(Layout* layout)
4849 if (!parameters->options().ld_generated_unwind_info())
4852 // Since we add stub .eh_frame info late, it must be placed
4853 // after all other linker generated .eh_frame info so that
4854 // merge mapping need not be updated for input sections.
4855 // There is no provision to use a different CIE to that used
4857 if (!this->targ_->has_glink())
4860 if (this->plt_size_ + this->branch_size_ + this->need_save_res_ == 0)
4863 this->init_plt_fde();
4864 layout->add_eh_frame_for_plt(this,
4865 Eh_cie<size>::eh_frame_cie,
4866 sizeof (Eh_cie<size>::eh_frame_cie),
4867 this->plt_fde_, this->plt_fde_len_);
4870 template<int size, bool big_endian>
4872 Stub_table<size, big_endian>::remove_eh_frame(Layout* layout)
4874 if (this->plt_fde_len_ != 0)
4876 layout->remove_eh_frame_for_plt(this,
4877 Eh_cie<size>::eh_frame_cie,
4878 sizeof (Eh_cie<size>::eh_frame_cie),
4879 this->plt_fde_, this->plt_fde_len_);
4880 this->plt_fde_len_ = 0;
4884 // A class to handle .glink.
4886 template<int size, bool big_endian>
4887 class Output_data_glink : public Output_section_data
4890 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
4891 static const Address invalid_address = static_cast<Address>(0) - 1;
4893 Output_data_glink(Target_powerpc<size, big_endian>* targ)
4894 : Output_section_data(16), targ_(targ), global_entry_stubs_(),
4895 end_branch_table_(), ge_size_(0)
4899 add_eh_frame(Layout* layout);
4902 add_global_entry(const Symbol*);
4905 find_global_entry(const Symbol*) const;
4908 global_entry_align(unsigned int off) const
4910 unsigned int align = param_plt_align<size>();
4911 return (off + align - 1) & -align;
4915 global_entry_off() const
4917 return this->global_entry_align(this->end_branch_table_);
4921 global_entry_address() const
4923 gold_assert(this->is_data_size_valid());
4924 return this->address() + this->global_entry_off();
4928 pltresolve_size() const
4932 + (this->targ_->abiversion() < 2 ? 11 * 4 : 14 * 4));
4937 // Write to a map file.
4939 do_print_to_mapfile(Mapfile* mapfile) const
4940 { mapfile->print_output_data(this, _("** glink")); }
4944 set_final_data_size();
4948 do_write(Output_file*);
4950 // Allows access to .got and .plt for do_write.
4951 Target_powerpc<size, big_endian>* targ_;
4953 // Map sym to stub offset.
4954 typedef Unordered_map<const Symbol*, unsigned int> Global_entry_stub_entries;
4955 Global_entry_stub_entries global_entry_stubs_;
4957 unsigned int end_branch_table_, ge_size_;
4960 template<int size, bool big_endian>
4962 Output_data_glink<size, big_endian>::add_eh_frame(Layout* layout)
4964 if (!parameters->options().ld_generated_unwind_info())
4969 if (this->targ_->abiversion() < 2)
4970 layout->add_eh_frame_for_plt(this,
4971 Eh_cie<64>::eh_frame_cie,
4972 sizeof (Eh_cie<64>::eh_frame_cie),
4973 glink_eh_frame_fde_64v1,
4974 sizeof (glink_eh_frame_fde_64v1));
4976 layout->add_eh_frame_for_plt(this,
4977 Eh_cie<64>::eh_frame_cie,
4978 sizeof (Eh_cie<64>::eh_frame_cie),
4979 glink_eh_frame_fde_64v2,
4980 sizeof (glink_eh_frame_fde_64v2));
4984 // 32-bit .glink can use the default since the CIE return
4985 // address reg, LR, is valid.
4986 layout->add_eh_frame_for_plt(this,
4987 Eh_cie<32>::eh_frame_cie,
4988 sizeof (Eh_cie<32>::eh_frame_cie),
4990 sizeof (default_fde));
4991 // Except where LR is used in a PIC __glink_PLTresolve.
4992 if (parameters->options().output_is_position_independent())
4993 layout->add_eh_frame_for_plt(this,
4994 Eh_cie<32>::eh_frame_cie,
4995 sizeof (Eh_cie<32>::eh_frame_cie),
4996 glink_eh_frame_fde_32,
4997 sizeof (glink_eh_frame_fde_32));
5001 template<int size, bool big_endian>
5003 Output_data_glink<size, big_endian>::add_global_entry(const Symbol* gsym)
5005 unsigned int off = this->global_entry_align(this->ge_size_);
5006 std::pair<typename Global_entry_stub_entries::iterator, bool> p
5007 = this->global_entry_stubs_.insert(std::make_pair(gsym, off));
5009 this->ge_size_ = off + 16;
5012 template<int size, bool big_endian>
5013 typename Output_data_glink<size, big_endian>::Address
5014 Output_data_glink<size, big_endian>::find_global_entry(const Symbol* gsym) const
5016 typename Global_entry_stub_entries::const_iterator p
5017 = this->global_entry_stubs_.find(gsym);
5018 return p == this->global_entry_stubs_.end() ? invalid_address : p->second;
5021 template<int size, bool big_endian>
5023 Output_data_glink<size, big_endian>::set_final_data_size()
5025 unsigned int count = this->targ_->plt_entry_count();
5026 section_size_type total = 0;
5032 // space for branch table
5033 total += 4 * (count - 1);
5035 total += -total & 15;
5036 total += this->pltresolve_size();
5040 total += this->pltresolve_size();
5042 // space for branch table
5044 if (this->targ_->abiversion() < 2)
5048 total += 4 * (count - 0x8000);
5052 this->end_branch_table_ = total;
5053 total = this->global_entry_align(total);
5054 total += this->ge_size_;
5056 this->set_data_size(total);
5059 // Define symbols on stubs, identifying the stub.
5061 template<int size, bool big_endian>
5063 Stub_table<size, big_endian>::define_stub_syms(Symbol_table* symtab)
5065 if (!this->plt_call_stubs_.empty())
5067 // The key for the plt call stub hash table includes addresses,
5068 // therefore traversal order depends on those addresses, which
5069 // can change between runs if gold is a PIE. Unfortunately the
5070 // output .symtab ordering depends on the order in which symbols
5071 // are added to the linker symtab. We want reproducible output
5072 // so must sort the call stub symbols.
5073 typedef typename Plt_stub_entries::const_iterator plt_iter;
5074 std::vector<plt_iter> sorted;
5075 sorted.resize(this->plt_call_stubs_.size());
5077 for (plt_iter cs = this->plt_call_stubs_.begin();
5078 cs != this->plt_call_stubs_.end();
5080 sorted[cs->second.indx_] = cs;
5082 for (unsigned int i = 0; i < this->plt_call_stubs_.size(); ++i)
5084 plt_iter cs = sorted[i];
5087 if (cs->first.addend_ != 0)
5088 sprintf(add, "+%x", static_cast<uint32_t>(cs->first.addend_));
5091 if (cs->first.object_)
5093 const Powerpc_relobj<size, big_endian>* ppcobj = static_cast
5094 <const Powerpc_relobj<size, big_endian>*>(cs->first.object_);
5095 sprintf(obj, "%x:", ppcobj->uniq());
5098 const char *symname;
5099 if (cs->first.sym_ == NULL)
5101 sprintf(localname, "%x", cs->first.locsym_);
5102 symname = localname;
5104 else if (this->targ_->is_tls_get_addr_opt(cs->first.sym_))
5105 symname = this->targ_->tls_get_addr_opt()->name();
5107 symname = cs->first.sym_->name();
5108 char* name = new char[8 + 10 + strlen(obj) + strlen(symname) + strlen(add) + 1];
5109 sprintf(name, "%08x.plt_call.%s%s%s", this->uniq_, obj, symname, add);
5111 = this->stub_address() - this->address() + cs->second.off_;
5112 unsigned int stub_size = this->plt_call_align(this->plt_call_size(cs));
5113 this->targ_->define_local(symtab, name, this, value, stub_size);
5117 typedef typename Branch_stub_entries::const_iterator branch_iter;
5118 for (branch_iter bs = this->long_branch_stubs_.begin();
5119 bs != this->long_branch_stubs_.end();
5122 if (bs->first.save_res_)
5125 char* name = new char[8 + 13 + 16 + 1];
5126 sprintf(name, "%08x.long_branch.%llx", this->uniq_,
5127 static_cast<unsigned long long>(bs->first.dest_));
5128 Address value = (this->stub_address() - this->address()
5129 + this->plt_size_ + bs->second);
5130 unsigned int stub_size = this->branch_stub_size(bs);
5131 this->targ_->define_local(symtab, name, this, value, stub_size);
5135 // Write out plt and long branch stub code.
5137 template<int size, bool big_endian>
5139 Stub_table<size, big_endian>::do_write(Output_file* of)
5141 if (this->plt_call_stubs_.empty()
5142 && this->long_branch_stubs_.empty())
5145 const section_size_type start_off = this->offset();
5146 const section_size_type off = this->stub_offset();
5147 const section_size_type oview_size =
5148 convert_to_section_size_type(this->data_size() - (off - start_off));
5149 unsigned char* const oview = of->get_output_view(off, oview_size);
5154 const Output_data_got_powerpc<size, big_endian>* got
5155 = this->targ_->got_section();
5156 Address got_os_addr = got->output_section()->address();
5158 if (!this->plt_call_stubs_.empty())
5160 // The base address of the .plt section.
5161 Address plt_base = this->targ_->plt_section()->address();
5162 Address iplt_base = invalid_address;
5164 // Write out plt call stubs.
5165 typename Plt_stub_entries::const_iterator cs;
5166 for (cs = this->plt_call_stubs_.begin();
5167 cs != this->plt_call_stubs_.end();
5171 Address pltoff = this->plt_off(cs, &is_iplt);
5172 Address plt_addr = pltoff;
5175 if (iplt_base == invalid_address)
5176 iplt_base = this->targ_->iplt_section()->address();
5177 plt_addr += iplt_base;
5180 plt_addr += plt_base;
5181 const Powerpc_relobj<size, big_endian>* ppcobj = static_cast
5182 <const Powerpc_relobj<size, big_endian>*>(cs->first.object_);
5183 Address got_addr = got_os_addr + ppcobj->toc_base_offset();
5184 Address off = plt_addr - got_addr;
5186 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
5187 gold_error(_("%s: linkage table error against `%s'"),
5188 cs->first.object_->name().c_str(),
5189 cs->first.sym_->demangled_name().c_str());
5191 bool plt_load_toc = this->targ_->abiversion() < 2;
5193 = plt_load_toc && parameters->options().plt_static_chain();
5195 = plt_load_toc && this->targ_->plt_thread_safe();
5196 bool use_fake_dep = false;
5197 Address cmp_branch_off = 0;
5200 unsigned int pltindex
5201 = ((pltoff - this->targ_->first_plt_entry_offset())
5202 / this->targ_->plt_entry_size());
5204 = (this->targ_->glink_section()->pltresolve_size()
5206 if (pltindex > 32768)
5207 glinkoff += (pltindex - 32768) * 4;
5209 = this->targ_->glink_section()->address() + glinkoff;
5211 = (this->stub_address() + cs->second.off_ + 20
5212 + 4 * cs->second.r2save_
5213 + 4 * (ha(off) != 0)
5214 + 4 * (ha(off + 8 + 8 * static_chain) != ha(off))
5215 + 4 * static_chain);
5216 cmp_branch_off = to - from;
5217 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
5220 p = oview + cs->second.off_;
5221 const Symbol* gsym = cs->first.sym_;
5222 if (this->targ_->is_tls_get_addr_opt(gsym))
5224 write_insn<big_endian>(p, ld_11_3 + 0);
5226 write_insn<big_endian>(p, ld_12_3 + 8);
5228 write_insn<big_endian>(p, mr_0_3);
5230 write_insn<big_endian>(p, cmpdi_11_0);
5232 write_insn<big_endian>(p, add_3_12_13);
5234 write_insn<big_endian>(p, beqlr);
5236 write_insn<big_endian>(p, mr_3_0);
5238 if (!cs->second.localentry0_)
5240 write_insn<big_endian>(p, mflr_11);
5242 write_insn<big_endian>(p, (std_11_1
5243 + this->targ_->stk_linker()));
5246 use_fake_dep = thread_safe;
5250 if (cs->second.r2save_)
5252 write_insn<big_endian>(p,
5253 std_2_1 + this->targ_->stk_toc());
5258 write_insn<big_endian>(p, addis_11_2 + ha(off));
5260 write_insn<big_endian>(p, ld_12_11 + l(off));
5265 write_insn<big_endian>(p, addis_12_2 + ha(off));
5267 write_insn<big_endian>(p, ld_12_12 + l(off));
5271 && ha(off + 8 + 8 * static_chain) != ha(off))
5273 write_insn<big_endian>(p, addi_11_11 + l(off));
5277 write_insn<big_endian>(p, mtctr_12);
5283 write_insn<big_endian>(p, xor_2_12_12);
5285 write_insn<big_endian>(p, add_11_11_2);
5288 write_insn<big_endian>(p, ld_2_11 + l(off + 8));
5292 write_insn<big_endian>(p, ld_11_11 + l(off + 16));
5299 if (cs->second.r2save_)
5301 write_insn<big_endian>(p,
5302 std_2_1 + this->targ_->stk_toc());
5305 write_insn<big_endian>(p, ld_12_2 + l(off));
5308 && ha(off + 8 + 8 * static_chain) != ha(off))
5310 write_insn<big_endian>(p, addi_2_2 + l(off));
5314 write_insn<big_endian>(p, mtctr_12);
5320 write_insn<big_endian>(p, xor_11_12_12);
5322 write_insn<big_endian>(p, add_2_2_11);
5327 write_insn<big_endian>(p, ld_11_2 + l(off + 16));
5330 write_insn<big_endian>(p, ld_2_2 + l(off + 8));
5334 if (!cs->second.localentry0_
5335 && this->targ_->is_tls_get_addr_opt(gsym))
5337 write_insn<big_endian>(p, bctrl);
5339 write_insn<big_endian>(p, ld_2_1 + this->targ_->stk_toc());
5341 write_insn<big_endian>(p, ld_11_1 + this->targ_->stk_linker());
5343 write_insn<big_endian>(p, mtlr_11);
5345 write_insn<big_endian>(p, blr);
5347 else if (thread_safe && !use_fake_dep)
5349 write_insn<big_endian>(p, cmpldi_2_0);
5351 write_insn<big_endian>(p, bnectr_p4);
5353 write_insn<big_endian>(p, b | (cmp_branch_off & 0x3fffffc));
5356 write_insn<big_endian>(p, bctr);
5360 // Write out long branch stubs.
5361 typename Branch_stub_entries::const_iterator bs;
5362 for (bs = this->long_branch_stubs_.begin();
5363 bs != this->long_branch_stubs_.end();
5366 if (bs->first.save_res_)
5368 p = oview + this->plt_size_ + bs->second;
5369 Address loc = this->stub_address() + this->plt_size_ + bs->second;
5370 Address delta = bs->first.dest_ - loc;
5371 if (delta + (1 << 25) < 2 << 25)
5372 write_insn<big_endian>(p, b | (delta & 0x3fffffc));
5376 = this->targ_->find_branch_lookup_table(bs->first.dest_);
5377 gold_assert(brlt_addr != invalid_address);
5378 brlt_addr += this->targ_->brlt_section()->address();
5379 Address got_addr = got_os_addr + bs->first.toc_base_off_;
5380 Address brltoff = brlt_addr - got_addr;
5381 if (ha(brltoff) == 0)
5383 write_insn<big_endian>(p, ld_12_2 + l(brltoff)), p += 4;
5387 write_insn<big_endian>(p, addis_12_2 + ha(brltoff)), p += 4;
5388 write_insn<big_endian>(p, ld_12_12 + l(brltoff)), p += 4;
5390 write_insn<big_endian>(p, mtctr_12), p += 4;
5391 write_insn<big_endian>(p, bctr);
5397 if (!this->plt_call_stubs_.empty())
5399 // The base address of the .plt section.
5400 Address plt_base = this->targ_->plt_section()->address();
5401 Address iplt_base = invalid_address;
5402 // The address of _GLOBAL_OFFSET_TABLE_.
5403 Address g_o_t = invalid_address;
5405 // Write out plt call stubs.
5406 typename Plt_stub_entries::const_iterator cs;
5407 for (cs = this->plt_call_stubs_.begin();
5408 cs != this->plt_call_stubs_.end();
5412 Address plt_addr = this->plt_off(cs, &is_iplt);
5415 if (iplt_base == invalid_address)
5416 iplt_base = this->targ_->iplt_section()->address();
5417 plt_addr += iplt_base;
5420 plt_addr += plt_base;
5422 p = oview + cs->second.off_;
5423 const Symbol* gsym = cs->first.sym_;
5424 if (this->targ_->is_tls_get_addr_opt(gsym))
5426 write_insn<big_endian>(p, lwz_11_3 + 0);
5428 write_insn<big_endian>(p, lwz_12_3 + 4);
5430 write_insn<big_endian>(p, mr_0_3);
5432 write_insn<big_endian>(p, cmpwi_11_0);
5434 write_insn<big_endian>(p, add_3_12_2);
5436 write_insn<big_endian>(p, beqlr);
5438 write_insn<big_endian>(p, mr_3_0);
5440 write_insn<big_endian>(p, nop);
5443 if (parameters->options().output_is_position_independent())
5446 const Powerpc_relobj<size, big_endian>* ppcobj
5447 = (static_cast<const Powerpc_relobj<size, big_endian>*>
5448 (cs->first.object_));
5449 if (ppcobj != NULL && cs->first.addend_ >= 32768)
5451 unsigned int got2 = ppcobj->got2_shndx();
5452 got_addr = ppcobj->get_output_section_offset(got2);
5453 gold_assert(got_addr != invalid_address);
5454 got_addr += (ppcobj->output_section(got2)->address()
5455 + cs->first.addend_);
5459 if (g_o_t == invalid_address)
5461 const Output_data_got_powerpc<size, big_endian>* got
5462 = this->targ_->got_section();
5463 g_o_t = got->address() + got->g_o_t();
5468 Address off = plt_addr - got_addr;
5470 write_insn<big_endian>(p, lwz_11_30 + l(off));
5473 write_insn<big_endian>(p, addis_11_30 + ha(off));
5475 write_insn<big_endian>(p, lwz_11_11 + l(off));
5480 write_insn<big_endian>(p, lis_11 + ha(plt_addr));
5482 write_insn<big_endian>(p, lwz_11_11 + l(plt_addr));
5485 write_insn<big_endian>(p, mtctr_11);
5487 write_insn<big_endian>(p, bctr);
5491 // Write out long branch stubs.
5492 typename Branch_stub_entries::const_iterator bs;
5493 for (bs = this->long_branch_stubs_.begin();
5494 bs != this->long_branch_stubs_.end();
5497 if (bs->first.save_res_)
5499 p = oview + this->plt_size_ + bs->second;
5500 Address loc = this->stub_address() + this->plt_size_ + bs->second;
5501 Address delta = bs->first.dest_ - loc;
5502 if (delta + (1 << 25) < 2 << 25)
5503 write_insn<big_endian>(p, b | (delta & 0x3fffffc));
5504 else if (!parameters->options().output_is_position_independent())
5506 write_insn<big_endian>(p, lis_12 + ha(bs->first.dest_));
5508 write_insn<big_endian>(p, addi_12_12 + l(bs->first.dest_));
5513 write_insn<big_endian>(p, mflr_0);
5515 write_insn<big_endian>(p, bcl_20_31);
5517 write_insn<big_endian>(p, mflr_12);
5519 write_insn<big_endian>(p, addis_12_12 + ha(delta));
5521 write_insn<big_endian>(p, addi_12_12 + l(delta));
5523 write_insn<big_endian>(p, mtlr_0);
5526 write_insn<big_endian>(p, mtctr_12);
5528 write_insn<big_endian>(p, bctr);
5531 if (this->need_save_res_)
5533 p = oview + this->plt_size_ + this->branch_size_;
5534 memcpy (p, this->targ_->savres_section()->contents(),
5535 this->targ_->savres_section()->data_size());
5539 // Write out .glink.
5541 template<int size, bool big_endian>
5543 Output_data_glink<size, big_endian>::do_write(Output_file* of)
5545 const section_size_type off = this->offset();
5546 const section_size_type oview_size =
5547 convert_to_section_size_type(this->data_size());
5548 unsigned char* const oview = of->get_output_view(off, oview_size);
5551 // The base address of the .plt section.
5552 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
5553 Address plt_base = this->targ_->plt_section()->address();
5557 if (this->end_branch_table_ != 0)
5559 // Write pltresolve stub.
5561 Address after_bcl = this->address() + 16;
5562 Address pltoff = plt_base - after_bcl;
5564 elfcpp::Swap<64, big_endian>::writeval(p, pltoff), p += 8;
5566 if (this->targ_->abiversion() < 2)
5568 write_insn<big_endian>(p, mflr_12), p += 4;
5569 write_insn<big_endian>(p, bcl_20_31), p += 4;
5570 write_insn<big_endian>(p, mflr_11), p += 4;
5571 write_insn<big_endian>(p, ld_2_11 + l(-16)), p += 4;
5572 write_insn<big_endian>(p, mtlr_12), p += 4;
5573 write_insn<big_endian>(p, add_11_2_11), p += 4;
5574 write_insn<big_endian>(p, ld_12_11 + 0), p += 4;
5575 write_insn<big_endian>(p, ld_2_11 + 8), p += 4;
5576 write_insn<big_endian>(p, mtctr_12), p += 4;
5577 write_insn<big_endian>(p, ld_11_11 + 16), p += 4;
5581 write_insn<big_endian>(p, mflr_0), p += 4;
5582 write_insn<big_endian>(p, bcl_20_31), p += 4;
5583 write_insn<big_endian>(p, mflr_11), p += 4;
5584 write_insn<big_endian>(p, std_2_1 + 24), p += 4;
5585 write_insn<big_endian>(p, ld_2_11 + l(-16)), p += 4;
5586 write_insn<big_endian>(p, mtlr_0), p += 4;
5587 write_insn<big_endian>(p, sub_12_12_11), p += 4;
5588 write_insn<big_endian>(p, add_11_2_11), p += 4;
5589 write_insn<big_endian>(p, addi_0_12 + l(-48)), p += 4;
5590 write_insn<big_endian>(p, ld_12_11 + 0), p += 4;
5591 write_insn<big_endian>(p, srdi_0_0_2), p += 4;
5592 write_insn<big_endian>(p, mtctr_12), p += 4;
5593 write_insn<big_endian>(p, ld_11_11 + 8), p += 4;
5595 write_insn<big_endian>(p, bctr), p += 4;
5596 gold_assert(p == oview + this->pltresolve_size());
5598 // Write lazy link call stubs.
5600 while (p < oview + this->end_branch_table_)
5602 if (this->targ_->abiversion() < 2)
5606 write_insn<big_endian>(p, li_0_0 + indx), p += 4;
5610 write_insn<big_endian>(p, lis_0 + hi(indx)), p += 4;
5611 write_insn<big_endian>(p, ori_0_0_0 + l(indx)), p += 4;
5614 uint32_t branch_off = 8 - (p - oview);
5615 write_insn<big_endian>(p, b + (branch_off & 0x3fffffc)), p += 4;
5620 Address plt_base = this->targ_->plt_section()->address();
5621 Address iplt_base = invalid_address;
5622 unsigned int global_entry_off = this->global_entry_off();
5623 Address global_entry_base = this->address() + global_entry_off;
5624 typename Global_entry_stub_entries::const_iterator ge;
5625 for (ge = this->global_entry_stubs_.begin();
5626 ge != this->global_entry_stubs_.end();
5629 p = oview + global_entry_off + ge->second;
5630 Address plt_addr = ge->first->plt_offset();
5631 if (ge->first->type() == elfcpp::STT_GNU_IFUNC
5632 && ge->first->can_use_relative_reloc(false))
5634 if (iplt_base == invalid_address)
5635 iplt_base = this->targ_->iplt_section()->address();
5636 plt_addr += iplt_base;
5639 plt_addr += plt_base;
5640 Address my_addr = global_entry_base + ge->second;
5641 Address off = plt_addr - my_addr;
5643 if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
5644 gold_error(_("%s: linkage table error against `%s'"),
5645 ge->first->object()->name().c_str(),
5646 ge->first->demangled_name().c_str());
5648 write_insn<big_endian>(p, addis_12_12 + ha(off)), p += 4;
5649 write_insn<big_endian>(p, ld_12_12 + l(off)), p += 4;
5650 write_insn<big_endian>(p, mtctr_12), p += 4;
5651 write_insn<big_endian>(p, bctr);
5656 const Output_data_got_powerpc<size, big_endian>* got
5657 = this->targ_->got_section();
5658 // The address of _GLOBAL_OFFSET_TABLE_.
5659 Address g_o_t = got->address() + got->g_o_t();
5661 // Write out pltresolve branch table.
5663 unsigned int the_end = oview_size - this->pltresolve_size();
5664 unsigned char* end_p = oview + the_end;
5665 while (p < end_p - 8 * 4)
5666 write_insn<big_endian>(p, b + end_p - p), p += 4;
5668 write_insn<big_endian>(p, nop), p += 4;
5670 // Write out pltresolve call stub.
5671 end_p = oview + oview_size;
5672 if (parameters->options().output_is_position_independent())
5674 Address res0_off = 0;
5675 Address after_bcl_off = the_end + 12;
5676 Address bcl_res0 = after_bcl_off - res0_off;
5678 write_insn<big_endian>(p, addis_11_11 + ha(bcl_res0));
5680 write_insn<big_endian>(p, mflr_0);
5682 write_insn<big_endian>(p, bcl_20_31);
5684 write_insn<big_endian>(p, addi_11_11 + l(bcl_res0));
5686 write_insn<big_endian>(p, mflr_12);
5688 write_insn<big_endian>(p, mtlr_0);
5690 write_insn<big_endian>(p, sub_11_11_12);
5693 Address got_bcl = g_o_t + 4 - (after_bcl_off + this->address());
5695 write_insn<big_endian>(p, addis_12_12 + ha(got_bcl));
5697 if (ha(got_bcl) == ha(got_bcl + 4))
5699 write_insn<big_endian>(p, lwz_0_12 + l(got_bcl));
5701 write_insn<big_endian>(p, lwz_12_12 + l(got_bcl + 4));
5705 write_insn<big_endian>(p, lwzu_0_12 + l(got_bcl));
5707 write_insn<big_endian>(p, lwz_12_12 + 4);
5710 write_insn<big_endian>(p, mtctr_0);
5712 write_insn<big_endian>(p, add_0_11_11);
5714 write_insn<big_endian>(p, add_11_0_11);
5718 Address res0 = this->address();
5720 write_insn<big_endian>(p, lis_12 + ha(g_o_t + 4));
5722 write_insn<big_endian>(p, addis_11_11 + ha(-res0));
5724 if (ha(g_o_t + 4) == ha(g_o_t + 8))
5725 write_insn<big_endian>(p, lwz_0_12 + l(g_o_t + 4));
5727 write_insn<big_endian>(p, lwzu_0_12 + l(g_o_t + 4));
5729 write_insn<big_endian>(p, addi_11_11 + l(-res0));
5731 write_insn<big_endian>(p, mtctr_0);
5733 write_insn<big_endian>(p, add_0_11_11);
5735 if (ha(g_o_t + 4) == ha(g_o_t + 8))
5736 write_insn<big_endian>(p, lwz_12_12 + l(g_o_t + 8));
5738 write_insn<big_endian>(p, lwz_12_12 + 4);
5740 write_insn<big_endian>(p, add_11_0_11);
5743 write_insn<big_endian>(p, bctr);
5747 write_insn<big_endian>(p, nop);
5752 of->write_output_view(off, oview_size, oview);
5756 // A class to handle linker generated save/restore functions.
5758 template<int size, bool big_endian>
5759 class Output_data_save_res : public Output_section_data_build
5762 Output_data_save_res(Symbol_table* symtab);
5764 const unsigned char*
5771 // Write to a map file.
5773 do_print_to_mapfile(Mapfile* mapfile) const
5774 { mapfile->print_output_data(this, _("** save/restore")); }
5777 do_write(Output_file*);
5780 // The maximum size of save/restore contents.
5781 static const unsigned int savres_max = 218*4;
5784 savres_define(Symbol_table* symtab,
5786 unsigned int lo, unsigned int hi,
5787 unsigned char* write_ent(unsigned char*, int),
5788 unsigned char* write_tail(unsigned char*, int));
5790 unsigned char *contents_;
5793 template<bool big_endian>
5794 static unsigned char*
5795 savegpr0(unsigned char* p, int r)
5797 uint32_t insn = std_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8;
5798 write_insn<big_endian>(p, insn);
5802 template<bool big_endian>
5803 static unsigned char*
5804 savegpr0_tail(unsigned char* p, int r)
5806 p = savegpr0<big_endian>(p, r);
5807 uint32_t insn = std_0_1 + 16;
5808 write_insn<big_endian>(p, insn);
5810 write_insn<big_endian>(p, blr);
5814 template<bool big_endian>
5815 static unsigned char*
5816 restgpr0(unsigned char* p, int r)
5818 uint32_t insn = ld_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8;
5819 write_insn<big_endian>(p, insn);
5823 template<bool big_endian>
5824 static unsigned char*
5825 restgpr0_tail(unsigned char* p, int r)
5827 uint32_t insn = ld_0_1 + 16;
5828 write_insn<big_endian>(p, insn);
5830 p = restgpr0<big_endian>(p, r);
5831 write_insn<big_endian>(p, mtlr_0);
5835 p = restgpr0<big_endian>(p, 30);
5836 p = restgpr0<big_endian>(p, 31);
5838 write_insn<big_endian>(p, blr);
5842 template<bool big_endian>
5843 static unsigned char*
5844 savegpr1(unsigned char* p, int r)
5846 uint32_t insn = std_0_12 + (r << 21) + (1 << 16) - (32 - r) * 8;
5847 write_insn<big_endian>(p, insn);
5851 template<bool big_endian>
5852 static unsigned char*
5853 savegpr1_tail(unsigned char* p, int r)
5855 p = savegpr1<big_endian>(p, r);
5856 write_insn<big_endian>(p, blr);
5860 template<bool big_endian>
5861 static unsigned char*
5862 restgpr1(unsigned char* p, int r)
5864 uint32_t insn = ld_0_12 + (r << 21) + (1 << 16) - (32 - r) * 8;
5865 write_insn<big_endian>(p, insn);
5869 template<bool big_endian>
5870 static unsigned char*
5871 restgpr1_tail(unsigned char* p, int r)
5873 p = restgpr1<big_endian>(p, r);
5874 write_insn<big_endian>(p, blr);
5878 template<bool big_endian>
5879 static unsigned char*
5880 savefpr(unsigned char* p, int r)
5882 uint32_t insn = stfd_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8;
5883 write_insn<big_endian>(p, insn);
5887 template<bool big_endian>
5888 static unsigned char*
5889 savefpr0_tail(unsigned char* p, int r)
5891 p = savefpr<big_endian>(p, r);
5892 write_insn<big_endian>(p, std_0_1 + 16);
5894 write_insn<big_endian>(p, blr);
5898 template<bool big_endian>
5899 static unsigned char*
5900 restfpr(unsigned char* p, int r)
5902 uint32_t insn = lfd_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8;
5903 write_insn<big_endian>(p, insn);
5907 template<bool big_endian>
5908 static unsigned char*
5909 restfpr0_tail(unsigned char* p, int r)
5911 write_insn<big_endian>(p, ld_0_1 + 16);
5913 p = restfpr<big_endian>(p, r);
5914 write_insn<big_endian>(p, mtlr_0);
5918 p = restfpr<big_endian>(p, 30);
5919 p = restfpr<big_endian>(p, 31);
5921 write_insn<big_endian>(p, blr);
5925 template<bool big_endian>
5926 static unsigned char*
5927 savefpr1_tail(unsigned char* p, int r)
5929 p = savefpr<big_endian>(p, r);
5930 write_insn<big_endian>(p, blr);
5934 template<bool big_endian>
5935 static unsigned char*
5936 restfpr1_tail(unsigned char* p, int r)
5938 p = restfpr<big_endian>(p, r);
5939 write_insn<big_endian>(p, blr);
5943 template<bool big_endian>
5944 static unsigned char*
5945 savevr(unsigned char* p, int r)
5947 uint32_t insn = li_12_0 + (1 << 16) - (32 - r) * 16;
5948 write_insn<big_endian>(p, insn);
5950 insn = stvx_0_12_0 + (r << 21);
5951 write_insn<big_endian>(p, insn);
5955 template<bool big_endian>
5956 static unsigned char*
5957 savevr_tail(unsigned char* p, int r)
5959 p = savevr<big_endian>(p, r);
5960 write_insn<big_endian>(p, blr);
5964 template<bool big_endian>
5965 static unsigned char*
5966 restvr(unsigned char* p, int r)
5968 uint32_t insn = li_12_0 + (1 << 16) - (32 - r) * 16;
5969 write_insn<big_endian>(p, insn);
5971 insn = lvx_0_12_0 + (r << 21);
5972 write_insn<big_endian>(p, insn);
5976 template<bool big_endian>
5977 static unsigned char*
5978 restvr_tail(unsigned char* p, int r)
5980 p = restvr<big_endian>(p, r);
5981 write_insn<big_endian>(p, blr);
5986 template<int size, bool big_endian>
5987 Output_data_save_res<size, big_endian>::Output_data_save_res(
5988 Symbol_table* symtab)
5989 : Output_section_data_build(4),
5992 this->savres_define(symtab,
5993 "_savegpr0_", 14, 31,
5994 savegpr0<big_endian>, savegpr0_tail<big_endian>);
5995 this->savres_define(symtab,
5996 "_restgpr0_", 14, 29,
5997 restgpr0<big_endian>, restgpr0_tail<big_endian>);
5998 this->savres_define(symtab,
5999 "_restgpr0_", 30, 31,
6000 restgpr0<big_endian>, restgpr0_tail<big_endian>);
6001 this->savres_define(symtab,
6002 "_savegpr1_", 14, 31,
6003 savegpr1<big_endian>, savegpr1_tail<big_endian>);
6004 this->savres_define(symtab,
6005 "_restgpr1_", 14, 31,
6006 restgpr1<big_endian>, restgpr1_tail<big_endian>);
6007 this->savres_define(symtab,
6008 "_savefpr_", 14, 31,
6009 savefpr<big_endian>, savefpr0_tail<big_endian>);
6010 this->savres_define(symtab,
6011 "_restfpr_", 14, 29,
6012 restfpr<big_endian>, restfpr0_tail<big_endian>);
6013 this->savres_define(symtab,
6014 "_restfpr_", 30, 31,
6015 restfpr<big_endian>, restfpr0_tail<big_endian>);
6016 this->savres_define(symtab,
6018 savefpr<big_endian>, savefpr1_tail<big_endian>);
6019 this->savres_define(symtab,
6021 restfpr<big_endian>, restfpr1_tail<big_endian>);
6022 this->savres_define(symtab,
6024 savevr<big_endian>, savevr_tail<big_endian>);
6025 this->savres_define(symtab,
6027 restvr<big_endian>, restvr_tail<big_endian>);
6030 template<int size, bool big_endian>
6032 Output_data_save_res<size, big_endian>::savres_define(
6033 Symbol_table* symtab,
6035 unsigned int lo, unsigned int hi,
6036 unsigned char* write_ent(unsigned char*, int),
6037 unsigned char* write_tail(unsigned char*, int))
6039 size_t len = strlen(name);
6040 bool writing = false;
6043 memcpy(sym, name, len);
6046 for (unsigned int i = lo; i <= hi; i++)
6048 sym[len + 0] = i / 10 + '0';
6049 sym[len + 1] = i % 10 + '0';
6050 Symbol* gsym = symtab->lookup(sym);
6051 bool refd = gsym != NULL && gsym->is_undefined();
6052 writing = writing || refd;
6055 if (this->contents_ == NULL)
6056 this->contents_ = new unsigned char[this->savres_max];
6058 section_size_type value = this->current_data_size();
6059 unsigned char* p = this->contents_ + value;
6061 p = write_ent(p, i);
6063 p = write_tail(p, i);
6064 section_size_type cur_size = p - this->contents_;
6065 this->set_current_data_size(cur_size);
6067 symtab->define_in_output_data(sym, NULL, Symbol_table::PREDEFINED,
6068 this, value, cur_size - value,
6069 elfcpp::STT_FUNC, elfcpp::STB_GLOBAL,
6070 elfcpp::STV_HIDDEN, 0, false, false);
6075 // Write out save/restore.
6077 template<int size, bool big_endian>
6079 Output_data_save_res<size, big_endian>::do_write(Output_file* of)
6081 const section_size_type off = this->offset();
6082 const section_size_type oview_size =
6083 convert_to_section_size_type(this->data_size());
6084 unsigned char* const oview = of->get_output_view(off, oview_size);
6085 memcpy(oview, this->contents_, oview_size);
6086 of->write_output_view(off, oview_size, oview);
6090 // Create the glink section.
6092 template<int size, bool big_endian>
6094 Target_powerpc<size, big_endian>::make_glink_section(Layout* layout)
6096 if (this->glink_ == NULL)
6098 this->glink_ = new Output_data_glink<size, big_endian>(this);
6099 this->glink_->add_eh_frame(layout);
6100 layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS,
6101 elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR,
6102 this->glink_, ORDER_TEXT, false);
6106 // Create a PLT entry for a global symbol.
6108 template<int size, bool big_endian>
6110 Target_powerpc<size, big_endian>::make_plt_entry(Symbol_table* symtab,
6114 if (gsym->type() == elfcpp::STT_GNU_IFUNC
6115 && gsym->can_use_relative_reloc(false))
6117 if (this->iplt_ == NULL)
6118 this->make_iplt_section(symtab, layout);
6119 this->iplt_->add_ifunc_entry(gsym);
6123 if (this->plt_ == NULL)
6124 this->make_plt_section(symtab, layout);
6125 this->plt_->add_entry(gsym);
6129 // Make a PLT entry for a local STT_GNU_IFUNC symbol.
6131 template<int size, bool big_endian>
6133 Target_powerpc<size, big_endian>::make_local_ifunc_plt_entry(
6134 Symbol_table* symtab,
6136 Sized_relobj_file<size, big_endian>* relobj,
6139 if (this->iplt_ == NULL)
6140 this->make_iplt_section(symtab, layout);
6141 this->iplt_->add_local_ifunc_entry(relobj, r_sym);
6144 // Return the number of entries in the PLT.
6146 template<int size, bool big_endian>
6148 Target_powerpc<size, big_endian>::plt_entry_count() const
6150 if (this->plt_ == NULL)
6152 return this->plt_->entry_count();
6155 // Create a GOT entry for local dynamic __tls_get_addr calls.
6157 template<int size, bool big_endian>
6159 Target_powerpc<size, big_endian>::tlsld_got_offset(
6160 Symbol_table* symtab,
6162 Sized_relobj_file<size, big_endian>* object)
6164 if (this->tlsld_got_offset_ == -1U)
6166 gold_assert(symtab != NULL && layout != NULL && object != NULL);
6167 Reloc_section* rela_dyn = this->rela_dyn_section(layout);
6168 Output_data_got_powerpc<size, big_endian>* got
6169 = this->got_section(symtab, layout);
6170 unsigned int got_offset = got->add_constant_pair(0, 0);
6171 rela_dyn->add_local(object, 0, elfcpp::R_POWERPC_DTPMOD, got,
6173 this->tlsld_got_offset_ = got_offset;
6175 return this->tlsld_got_offset_;
6178 // Get the Reference_flags for a particular relocation.
6180 template<int size, bool big_endian>
6182 Target_powerpc<size, big_endian>::Scan::get_reference_flags(
6183 unsigned int r_type,
6184 const Target_powerpc* target)
6190 case elfcpp::R_POWERPC_NONE:
6191 case elfcpp::R_POWERPC_GNU_VTINHERIT:
6192 case elfcpp::R_POWERPC_GNU_VTENTRY:
6193 case elfcpp::R_PPC64_TOC:
6194 // No symbol reference.
6197 case elfcpp::R_PPC64_ADDR64:
6198 case elfcpp::R_PPC64_UADDR64:
6199 case elfcpp::R_POWERPC_ADDR32:
6200 case elfcpp::R_POWERPC_UADDR32:
6201 case elfcpp::R_POWERPC_ADDR16:
6202 case elfcpp::R_POWERPC_UADDR16:
6203 case elfcpp::R_POWERPC_ADDR16_LO:
6204 case elfcpp::R_POWERPC_ADDR16_HI:
6205 case elfcpp::R_POWERPC_ADDR16_HA:
6206 ref = Symbol::ABSOLUTE_REF;
6209 case elfcpp::R_POWERPC_ADDR24:
6210 case elfcpp::R_POWERPC_ADDR14:
6211 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
6212 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
6213 ref = Symbol::FUNCTION_CALL | Symbol::ABSOLUTE_REF;
6216 case elfcpp::R_PPC64_REL64:
6217 case elfcpp::R_POWERPC_REL32:
6218 case elfcpp::R_PPC_LOCAL24PC:
6219 case elfcpp::R_POWERPC_REL16:
6220 case elfcpp::R_POWERPC_REL16_LO:
6221 case elfcpp::R_POWERPC_REL16_HI:
6222 case elfcpp::R_POWERPC_REL16_HA:
6223 ref = Symbol::RELATIVE_REF;
6226 case elfcpp::R_POWERPC_REL24:
6227 case elfcpp::R_PPC_PLTREL24:
6228 case elfcpp::R_POWERPC_REL14:
6229 case elfcpp::R_POWERPC_REL14_BRTAKEN:
6230 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
6231 ref = Symbol::FUNCTION_CALL | Symbol::RELATIVE_REF;
6234 case elfcpp::R_POWERPC_GOT16:
6235 case elfcpp::R_POWERPC_GOT16_LO:
6236 case elfcpp::R_POWERPC_GOT16_HI:
6237 case elfcpp::R_POWERPC_GOT16_HA:
6238 case elfcpp::R_PPC64_GOT16_DS:
6239 case elfcpp::R_PPC64_GOT16_LO_DS:
6240 case elfcpp::R_PPC64_TOC16:
6241 case elfcpp::R_PPC64_TOC16_LO:
6242 case elfcpp::R_PPC64_TOC16_HI:
6243 case elfcpp::R_PPC64_TOC16_HA:
6244 case elfcpp::R_PPC64_TOC16_DS:
6245 case elfcpp::R_PPC64_TOC16_LO_DS:
6246 ref = Symbol::RELATIVE_REF;
6249 case elfcpp::R_POWERPC_GOT_TPREL16:
6250 case elfcpp::R_POWERPC_TLS:
6251 ref = Symbol::TLS_REF;
6254 case elfcpp::R_POWERPC_COPY:
6255 case elfcpp::R_POWERPC_GLOB_DAT:
6256 case elfcpp::R_POWERPC_JMP_SLOT:
6257 case elfcpp::R_POWERPC_RELATIVE:
6258 case elfcpp::R_POWERPC_DTPMOD:
6260 // Not expected. We will give an error later.
6264 if (size == 64 && target->abiversion() < 2)
6265 ref |= Symbol::FUNC_DESC_ABI;
6269 // Report an unsupported relocation against a local symbol.
6271 template<int size, bool big_endian>
6273 Target_powerpc<size, big_endian>::Scan::unsupported_reloc_local(
6274 Sized_relobj_file<size, big_endian>* object,
6275 unsigned int r_type)
6277 gold_error(_("%s: unsupported reloc %u against local symbol"),
6278 object->name().c_str(), r_type);
6281 // We are about to emit a dynamic relocation of type R_TYPE. If the
6282 // dynamic linker does not support it, issue an error.
6284 template<int size, bool big_endian>
6286 Target_powerpc<size, big_endian>::Scan::check_non_pic(Relobj* object,
6287 unsigned int r_type)
6289 gold_assert(r_type != elfcpp::R_POWERPC_NONE);
6291 // These are the relocation types supported by glibc for both 32-bit
6292 // and 64-bit powerpc.
6295 case elfcpp::R_POWERPC_NONE:
6296 case elfcpp::R_POWERPC_RELATIVE:
6297 case elfcpp::R_POWERPC_GLOB_DAT:
6298 case elfcpp::R_POWERPC_DTPMOD:
6299 case elfcpp::R_POWERPC_DTPREL:
6300 case elfcpp::R_POWERPC_TPREL:
6301 case elfcpp::R_POWERPC_JMP_SLOT:
6302 case elfcpp::R_POWERPC_COPY:
6303 case elfcpp::R_POWERPC_IRELATIVE:
6304 case elfcpp::R_POWERPC_ADDR32:
6305 case elfcpp::R_POWERPC_UADDR32:
6306 case elfcpp::R_POWERPC_ADDR24:
6307 case elfcpp::R_POWERPC_ADDR16:
6308 case elfcpp::R_POWERPC_UADDR16:
6309 case elfcpp::R_POWERPC_ADDR16_LO:
6310 case elfcpp::R_POWERPC_ADDR16_HI:
6311 case elfcpp::R_POWERPC_ADDR16_HA:
6312 case elfcpp::R_POWERPC_ADDR14:
6313 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
6314 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
6315 case elfcpp::R_POWERPC_REL32:
6316 case elfcpp::R_POWERPC_REL24:
6317 case elfcpp::R_POWERPC_TPREL16:
6318 case elfcpp::R_POWERPC_TPREL16_LO:
6319 case elfcpp::R_POWERPC_TPREL16_HI:
6320 case elfcpp::R_POWERPC_TPREL16_HA:
6331 // These are the relocation types supported only on 64-bit.
6332 case elfcpp::R_PPC64_ADDR64:
6333 case elfcpp::R_PPC64_UADDR64:
6334 case elfcpp::R_PPC64_JMP_IREL:
6335 case elfcpp::R_PPC64_ADDR16_DS:
6336 case elfcpp::R_PPC64_ADDR16_LO_DS:
6337 case elfcpp::R_PPC64_ADDR16_HIGH:
6338 case elfcpp::R_PPC64_ADDR16_HIGHA:
6339 case elfcpp::R_PPC64_ADDR16_HIGHER:
6340 case elfcpp::R_PPC64_ADDR16_HIGHEST:
6341 case elfcpp::R_PPC64_ADDR16_HIGHERA:
6342 case elfcpp::R_PPC64_ADDR16_HIGHESTA:
6343 case elfcpp::R_PPC64_REL64:
6344 case elfcpp::R_POWERPC_ADDR30:
6345 case elfcpp::R_PPC64_TPREL16_DS:
6346 case elfcpp::R_PPC64_TPREL16_LO_DS:
6347 case elfcpp::R_PPC64_TPREL16_HIGH:
6348 case elfcpp::R_PPC64_TPREL16_HIGHA:
6349 case elfcpp::R_PPC64_TPREL16_HIGHER:
6350 case elfcpp::R_PPC64_TPREL16_HIGHEST:
6351 case elfcpp::R_PPC64_TPREL16_HIGHERA:
6352 case elfcpp::R_PPC64_TPREL16_HIGHESTA:
6363 // These are the relocation types supported only on 32-bit.
6364 // ??? glibc ld.so doesn't need to support these.
6365 case elfcpp::R_POWERPC_DTPREL16:
6366 case elfcpp::R_POWERPC_DTPREL16_LO:
6367 case elfcpp::R_POWERPC_DTPREL16_HI:
6368 case elfcpp::R_POWERPC_DTPREL16_HA:
6376 // This prevents us from issuing more than one error per reloc
6377 // section. But we can still wind up issuing more than one
6378 // error per object file.
6379 if (this->issued_non_pic_error_)
6381 gold_assert(parameters->options().output_is_position_independent());
6382 object->error(_("requires unsupported dynamic reloc; "
6383 "recompile with -fPIC"));
6384 this->issued_non_pic_error_ = true;
6388 // Return whether we need to make a PLT entry for a relocation of the
6389 // given type against a STT_GNU_IFUNC symbol.
6391 template<int size, bool big_endian>
6393 Target_powerpc<size, big_endian>::Scan::reloc_needs_plt_for_ifunc(
6394 Target_powerpc<size, big_endian>* target,
6395 Sized_relobj_file<size, big_endian>* object,
6396 unsigned int r_type,
6399 // In non-pic code any reference will resolve to the plt call stub
6400 // for the ifunc symbol.
6401 if ((size == 32 || target->abiversion() >= 2)
6402 && !parameters->options().output_is_position_independent())
6407 // Word size refs from data sections are OK, but don't need a PLT entry.
6408 case elfcpp::R_POWERPC_ADDR32:
6409 case elfcpp::R_POWERPC_UADDR32:
6414 case elfcpp::R_PPC64_ADDR64:
6415 case elfcpp::R_PPC64_UADDR64:
6420 // GOT refs are good, but also don't need a PLT entry.
6421 case elfcpp::R_POWERPC_GOT16:
6422 case elfcpp::R_POWERPC_GOT16_LO:
6423 case elfcpp::R_POWERPC_GOT16_HI:
6424 case elfcpp::R_POWERPC_GOT16_HA:
6425 case elfcpp::R_PPC64_GOT16_DS:
6426 case elfcpp::R_PPC64_GOT16_LO_DS:
6429 // Function calls are good, and these do need a PLT entry.
6430 case elfcpp::R_POWERPC_ADDR24:
6431 case elfcpp::R_POWERPC_ADDR14:
6432 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
6433 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
6434 case elfcpp::R_POWERPC_REL24:
6435 case elfcpp::R_PPC_PLTREL24:
6436 case elfcpp::R_POWERPC_REL14:
6437 case elfcpp::R_POWERPC_REL14_BRTAKEN:
6438 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
6445 // Anything else is a problem.
6446 // If we are building a static executable, the libc startup function
6447 // responsible for applying indirect function relocations is going
6448 // to complain about the reloc type.
6449 // If we are building a dynamic executable, we will have a text
6450 // relocation. The dynamic loader will set the text segment
6451 // writable and non-executable to apply text relocations. So we'll
6452 // segfault when trying to run the indirection function to resolve
6455 gold_error(_("%s: unsupported reloc %u for IFUNC symbol"),
6456 object->name().c_str(), r_type);
6460 // Return TRUE iff INSN is one we expect on a _LO variety toc/got
6464 ok_lo_toc_insn(uint32_t insn, unsigned int r_type)
6466 return ((insn & (0x3f << 26)) == 12u << 26 /* addic */
6467 || (insn & (0x3f << 26)) == 14u << 26 /* addi */
6468 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
6469 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
6470 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
6471 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
6472 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
6473 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
6474 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
6475 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
6476 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
6477 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
6478 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
6479 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
6480 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
6481 || (insn & (0x3f << 26)) == 56u << 26 /* lq,lfq */
6482 || ((insn & (0x3f << 26)) == 57u << 26 /* lxsd,lxssp,lfdp */
6483 /* Exclude lfqu by testing reloc. If relocs are ever
6484 defined for the reduced D field in psq_lu then those
6485 will need testing too. */
6486 && r_type != elfcpp::R_PPC64_TOC16_LO
6487 && r_type != elfcpp::R_POWERPC_GOT16_LO)
6488 || ((insn & (0x3f << 26)) == 58u << 26 /* ld,lwa */
6490 || (insn & (0x3f << 26)) == 60u << 26 /* stfq */
6491 || ((insn & (0x3f << 26)) == 61u << 26 /* lxv,stx{v,sd,ssp},stfdp */
6492 /* Exclude stfqu. psq_stu as above for psq_lu. */
6493 && r_type != elfcpp::R_PPC64_TOC16_LO
6494 && r_type != elfcpp::R_POWERPC_GOT16_LO)
6495 || ((insn & (0x3f << 26)) == 62u << 26 /* std,stq */
6496 && (insn & 1) == 0));
6499 // Scan a relocation for a local symbol.
6501 template<int size, bool big_endian>
6503 Target_powerpc<size, big_endian>::Scan::local(
6504 Symbol_table* symtab,
6506 Target_powerpc<size, big_endian>* target,
6507 Sized_relobj_file<size, big_endian>* object,
6508 unsigned int data_shndx,
6509 Output_section* output_section,
6510 const elfcpp::Rela<size, big_endian>& reloc,
6511 unsigned int r_type,
6512 const elfcpp::Sym<size, big_endian>& lsym,
6515 this->maybe_skip_tls_get_addr_call(target, r_type, NULL);
6517 if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD)
6518 || (size == 32 && r_type == elfcpp::R_PPC_TLSGD))
6520 this->expect_tls_get_addr_call();
6521 const tls::Tls_optimization tls_type = target->optimize_tls_gd(true);
6522 if (tls_type != tls::TLSOPT_NONE)
6523 this->skip_next_tls_get_addr_call();
6525 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD)
6526 || (size == 32 && r_type == elfcpp::R_PPC_TLSLD))
6528 this->expect_tls_get_addr_call();
6529 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
6530 if (tls_type != tls::TLSOPT_NONE)
6531 this->skip_next_tls_get_addr_call();
6534 Powerpc_relobj<size, big_endian>* ppc_object
6535 = static_cast<Powerpc_relobj<size, big_endian>*>(object);
6540 && data_shndx == ppc_object->opd_shndx()
6541 && r_type == elfcpp::R_PPC64_ADDR64)
6542 ppc_object->set_opd_discard(reloc.get_r_offset());
6546 // A local STT_GNU_IFUNC symbol may require a PLT entry.
6547 bool is_ifunc = lsym.get_st_type() == elfcpp::STT_GNU_IFUNC;
6548 if (is_ifunc && this->reloc_needs_plt_for_ifunc(target, object, r_type, true))
6550 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
6551 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
6552 r_type, r_sym, reloc.get_r_addend());
6553 target->make_local_ifunc_plt_entry(symtab, layout, object, r_sym);
6558 case elfcpp::R_POWERPC_NONE:
6559 case elfcpp::R_POWERPC_GNU_VTINHERIT:
6560 case elfcpp::R_POWERPC_GNU_VTENTRY:
6561 case elfcpp::R_POWERPC_TLS:
6562 case elfcpp::R_PPC64_ENTRY:
6565 case elfcpp::R_PPC64_TOC:
6567 Output_data_got_powerpc<size, big_endian>* got
6568 = target->got_section(symtab, layout);
6569 if (parameters->options().output_is_position_independent())
6571 Address off = reloc.get_r_offset();
6573 && target->abiversion() < 2
6574 && data_shndx == ppc_object->opd_shndx()
6575 && ppc_object->get_opd_discard(off - 8))
6578 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
6579 Powerpc_relobj<size, big_endian>* symobj = ppc_object;
6580 rela_dyn->add_output_section_relative(got->output_section(),
6581 elfcpp::R_POWERPC_RELATIVE,
6583 object, data_shndx, off,
6584 symobj->toc_base_offset());
6589 case elfcpp::R_PPC64_ADDR64:
6590 case elfcpp::R_PPC64_UADDR64:
6591 case elfcpp::R_POWERPC_ADDR32:
6592 case elfcpp::R_POWERPC_UADDR32:
6593 case elfcpp::R_POWERPC_ADDR24:
6594 case elfcpp::R_POWERPC_ADDR16:
6595 case elfcpp::R_POWERPC_ADDR16_LO:
6596 case elfcpp::R_POWERPC_ADDR16_HI:
6597 case elfcpp::R_POWERPC_ADDR16_HA:
6598 case elfcpp::R_POWERPC_UADDR16:
6599 case elfcpp::R_PPC64_ADDR16_HIGH:
6600 case elfcpp::R_PPC64_ADDR16_HIGHA:
6601 case elfcpp::R_PPC64_ADDR16_HIGHER:
6602 case elfcpp::R_PPC64_ADDR16_HIGHERA:
6603 case elfcpp::R_PPC64_ADDR16_HIGHEST:
6604 case elfcpp::R_PPC64_ADDR16_HIGHESTA:
6605 case elfcpp::R_PPC64_ADDR16_DS:
6606 case elfcpp::R_PPC64_ADDR16_LO_DS:
6607 case elfcpp::R_POWERPC_ADDR14:
6608 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
6609 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
6610 // If building a shared library (or a position-independent
6611 // executable), we need to create a dynamic relocation for
6613 if (parameters->options().output_is_position_independent()
6614 || (size == 64 && is_ifunc && target->abiversion() < 2))
6616 Reloc_section* rela_dyn = target->rela_dyn_section(symtab, layout,
6618 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
6619 if ((size == 32 && r_type == elfcpp::R_POWERPC_ADDR32)
6620 || (size == 64 && r_type == elfcpp::R_PPC64_ADDR64))
6622 unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE
6623 : elfcpp::R_POWERPC_RELATIVE);
6624 rela_dyn->add_local_relative(object, r_sym, dynrel,
6625 output_section, data_shndx,
6626 reloc.get_r_offset(),
6627 reloc.get_r_addend(), false);
6629 else if (lsym.get_st_type() != elfcpp::STT_SECTION)
6631 check_non_pic(object, r_type);
6632 rela_dyn->add_local(object, r_sym, r_type, output_section,
6633 data_shndx, reloc.get_r_offset(),
6634 reloc.get_r_addend());
6638 gold_assert(lsym.get_st_value() == 0);
6639 unsigned int shndx = lsym.get_st_shndx();
6641 shndx = object->adjust_sym_shndx(r_sym, shndx,
6644 object->error(_("section symbol %u has bad shndx %u"),
6647 rela_dyn->add_local_section(object, shndx, r_type,
6648 output_section, data_shndx,
6649 reloc.get_r_offset());
6654 case elfcpp::R_POWERPC_REL24:
6655 case elfcpp::R_PPC_PLTREL24:
6656 case elfcpp::R_PPC_LOCAL24PC:
6657 case elfcpp::R_POWERPC_REL14:
6658 case elfcpp::R_POWERPC_REL14_BRTAKEN:
6659 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
6662 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
6663 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
6664 r_type, r_sym, reloc.get_r_addend());
6668 case elfcpp::R_PPC64_TOCSAVE:
6669 // R_PPC64_TOCSAVE follows a call instruction to indicate the
6670 // caller has already saved r2 and thus a plt call stub need not
6673 && target->mark_pltcall(ppc_object, data_shndx,
6674 reloc.get_r_offset() - 4, symtab))
6676 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
6677 unsigned int shndx = lsym.get_st_shndx();
6679 shndx = object->adjust_sym_shndx(r_sym, shndx, &is_ordinary);
6681 object->error(_("tocsave symbol %u has bad shndx %u"),
6684 target->add_tocsave(ppc_object, shndx,
6685 lsym.get_st_value() + reloc.get_r_addend());
6689 case elfcpp::R_PPC64_REL64:
6690 case elfcpp::R_POWERPC_REL32:
6691 case elfcpp::R_POWERPC_REL16:
6692 case elfcpp::R_POWERPC_REL16_LO:
6693 case elfcpp::R_POWERPC_REL16_HI:
6694 case elfcpp::R_POWERPC_REL16_HA:
6695 case elfcpp::R_POWERPC_REL16DX_HA:
6696 case elfcpp::R_POWERPC_SECTOFF:
6697 case elfcpp::R_POWERPC_SECTOFF_LO:
6698 case elfcpp::R_POWERPC_SECTOFF_HI:
6699 case elfcpp::R_POWERPC_SECTOFF_HA:
6700 case elfcpp::R_PPC64_SECTOFF_DS:
6701 case elfcpp::R_PPC64_SECTOFF_LO_DS:
6702 case elfcpp::R_POWERPC_TPREL16:
6703 case elfcpp::R_POWERPC_TPREL16_LO:
6704 case elfcpp::R_POWERPC_TPREL16_HI:
6705 case elfcpp::R_POWERPC_TPREL16_HA:
6706 case elfcpp::R_PPC64_TPREL16_DS:
6707 case elfcpp::R_PPC64_TPREL16_LO_DS:
6708 case elfcpp::R_PPC64_TPREL16_HIGH:
6709 case elfcpp::R_PPC64_TPREL16_HIGHA:
6710 case elfcpp::R_PPC64_TPREL16_HIGHER:
6711 case elfcpp::R_PPC64_TPREL16_HIGHERA:
6712 case elfcpp::R_PPC64_TPREL16_HIGHEST:
6713 case elfcpp::R_PPC64_TPREL16_HIGHESTA:
6714 case elfcpp::R_POWERPC_DTPREL16:
6715 case elfcpp::R_POWERPC_DTPREL16_LO:
6716 case elfcpp::R_POWERPC_DTPREL16_HI:
6717 case elfcpp::R_POWERPC_DTPREL16_HA:
6718 case elfcpp::R_PPC64_DTPREL16_DS:
6719 case elfcpp::R_PPC64_DTPREL16_LO_DS:
6720 case elfcpp::R_PPC64_DTPREL16_HIGH:
6721 case elfcpp::R_PPC64_DTPREL16_HIGHA:
6722 case elfcpp::R_PPC64_DTPREL16_HIGHER:
6723 case elfcpp::R_PPC64_DTPREL16_HIGHERA:
6724 case elfcpp::R_PPC64_DTPREL16_HIGHEST:
6725 case elfcpp::R_PPC64_DTPREL16_HIGHESTA:
6726 case elfcpp::R_PPC64_TLSGD:
6727 case elfcpp::R_PPC64_TLSLD:
6728 case elfcpp::R_PPC64_ADDR64_LOCAL:
6731 case elfcpp::R_POWERPC_GOT16:
6732 case elfcpp::R_POWERPC_GOT16_LO:
6733 case elfcpp::R_POWERPC_GOT16_HI:
6734 case elfcpp::R_POWERPC_GOT16_HA:
6735 case elfcpp::R_PPC64_GOT16_DS:
6736 case elfcpp::R_PPC64_GOT16_LO_DS:
6738 // The symbol requires a GOT entry.
6739 Output_data_got_powerpc<size, big_endian>* got
6740 = target->got_section(symtab, layout);
6741 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
6743 if (!parameters->options().output_is_position_independent())
6746 && (size == 32 || target->abiversion() >= 2))
6747 got->add_local_plt(object, r_sym, GOT_TYPE_STANDARD);
6749 got->add_local(object, r_sym, GOT_TYPE_STANDARD);
6751 else if (!object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD))
6753 // If we are generating a shared object or a pie, this
6754 // symbol's GOT entry will be set by a dynamic relocation.
6756 off = got->add_constant(0);
6757 object->set_local_got_offset(r_sym, GOT_TYPE_STANDARD, off);
6759 Reloc_section* rela_dyn = target->rela_dyn_section(symtab, layout,
6761 unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE
6762 : elfcpp::R_POWERPC_RELATIVE);
6763 rela_dyn->add_local_relative(object, r_sym, dynrel,
6764 got, off, 0, false);
6769 case elfcpp::R_PPC64_TOC16:
6770 case elfcpp::R_PPC64_TOC16_LO:
6771 case elfcpp::R_PPC64_TOC16_HI:
6772 case elfcpp::R_PPC64_TOC16_HA:
6773 case elfcpp::R_PPC64_TOC16_DS:
6774 case elfcpp::R_PPC64_TOC16_LO_DS:
6775 // We need a GOT section.
6776 target->got_section(symtab, layout);
6779 case elfcpp::R_POWERPC_GOT_TLSGD16:
6780 case elfcpp::R_POWERPC_GOT_TLSGD16_LO:
6781 case elfcpp::R_POWERPC_GOT_TLSGD16_HI:
6782 case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
6784 const tls::Tls_optimization tls_type = target->optimize_tls_gd(true);
6785 if (tls_type == tls::TLSOPT_NONE)
6787 Output_data_got_powerpc<size, big_endian>* got
6788 = target->got_section(symtab, layout);
6789 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
6790 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
6791 got->add_local_tls_pair(object, r_sym, GOT_TYPE_TLSGD,
6792 rela_dyn, elfcpp::R_POWERPC_DTPMOD);
6794 else if (tls_type == tls::TLSOPT_TO_LE)
6796 // no GOT relocs needed for Local Exec.
6803 case elfcpp::R_POWERPC_GOT_TLSLD16:
6804 case elfcpp::R_POWERPC_GOT_TLSLD16_LO:
6805 case elfcpp::R_POWERPC_GOT_TLSLD16_HI:
6806 case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
6808 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
6809 if (tls_type == tls::TLSOPT_NONE)
6810 target->tlsld_got_offset(symtab, layout, object);
6811 else if (tls_type == tls::TLSOPT_TO_LE)
6813 // no GOT relocs needed for Local Exec.
6814 if (parameters->options().emit_relocs())
6816 Output_section* os = layout->tls_segment()->first_section();
6817 gold_assert(os != NULL);
6818 os->set_needs_symtab_index();
6826 case elfcpp::R_POWERPC_GOT_DTPREL16:
6827 case elfcpp::R_POWERPC_GOT_DTPREL16_LO:
6828 case elfcpp::R_POWERPC_GOT_DTPREL16_HI:
6829 case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
6831 Output_data_got_powerpc<size, big_endian>* got
6832 = target->got_section(symtab, layout);
6833 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
6834 got->add_local_tls(object, r_sym, GOT_TYPE_DTPREL);
6838 case elfcpp::R_POWERPC_GOT_TPREL16:
6839 case elfcpp::R_POWERPC_GOT_TPREL16_LO:
6840 case elfcpp::R_POWERPC_GOT_TPREL16_HI:
6841 case elfcpp::R_POWERPC_GOT_TPREL16_HA:
6843 const tls::Tls_optimization tls_type = target->optimize_tls_ie(true);
6844 if (tls_type == tls::TLSOPT_NONE)
6846 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
6847 if (!object->local_has_got_offset(r_sym, GOT_TYPE_TPREL))
6849 Output_data_got_powerpc<size, big_endian>* got
6850 = target->got_section(symtab, layout);
6851 unsigned int off = got->add_constant(0);
6852 object->set_local_got_offset(r_sym, GOT_TYPE_TPREL, off);
6854 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
6855 rela_dyn->add_symbolless_local_addend(object, r_sym,
6856 elfcpp::R_POWERPC_TPREL,
6860 else if (tls_type == tls::TLSOPT_TO_LE)
6862 // no GOT relocs needed for Local Exec.
6870 unsupported_reloc_local(object, r_type);
6875 && parameters->options().toc_optimize())
6877 if (data_shndx == ppc_object->toc_shndx())
6880 if (r_type != elfcpp::R_PPC64_ADDR64
6881 || (is_ifunc && target->abiversion() < 2))
6883 else if (parameters->options().output_is_position_independent())
6889 unsigned int shndx = lsym.get_st_shndx();
6890 if (shndx >= elfcpp::SHN_LORESERVE
6891 && shndx != elfcpp::SHN_XINDEX)
6896 ppc_object->set_no_toc_opt(reloc.get_r_offset());
6899 enum {no_check, check_lo, check_ha} insn_check;
6903 insn_check = no_check;
6906 case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
6907 case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
6908 case elfcpp::R_POWERPC_GOT_TPREL16_HA:
6909 case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
6910 case elfcpp::R_POWERPC_GOT16_HA:
6911 case elfcpp::R_PPC64_TOC16_HA:
6912 insn_check = check_ha;
6915 case elfcpp::R_POWERPC_GOT_TLSLD16_LO:
6916 case elfcpp::R_POWERPC_GOT_TLSGD16_LO:
6917 case elfcpp::R_POWERPC_GOT_TPREL16_LO:
6918 case elfcpp::R_POWERPC_GOT_DTPREL16_LO:
6919 case elfcpp::R_POWERPC_GOT16_LO:
6920 case elfcpp::R_PPC64_GOT16_LO_DS:
6921 case elfcpp::R_PPC64_TOC16_LO:
6922 case elfcpp::R_PPC64_TOC16_LO_DS:
6923 insn_check = check_lo;
6927 section_size_type slen;
6928 const unsigned char* view = NULL;
6929 if (insn_check != no_check)
6931 view = ppc_object->section_contents(data_shndx, &slen, false);
6932 section_size_type off =
6933 convert_to_section_size_type(reloc.get_r_offset()) & -4;
6936 uint32_t insn = elfcpp::Swap<32, big_endian>::readval(view + off);
6937 if (insn_check == check_lo
6938 ? !ok_lo_toc_insn(insn, r_type)
6939 : ((insn & ((0x3f << 26) | 0x1f << 16))
6940 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
6942 ppc_object->set_no_toc_opt();
6943 gold_warning(_("%s: toc optimization is not supported "
6944 "for %#08x instruction"),
6945 ppc_object->name().c_str(), insn);
6954 case elfcpp::R_PPC64_TOC16:
6955 case elfcpp::R_PPC64_TOC16_LO:
6956 case elfcpp::R_PPC64_TOC16_HI:
6957 case elfcpp::R_PPC64_TOC16_HA:
6958 case elfcpp::R_PPC64_TOC16_DS:
6959 case elfcpp::R_PPC64_TOC16_LO_DS:
6960 unsigned int shndx = lsym.get_st_shndx();
6961 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
6963 shndx = ppc_object->adjust_sym_shndx(r_sym, shndx, &is_ordinary);
6964 if (is_ordinary && shndx == ppc_object->toc_shndx())
6966 Address dst_off = lsym.get_st_value() + reloc.get_r_addend();
6967 if (dst_off < ppc_object->section_size(shndx))
6970 if (r_type == elfcpp::R_PPC64_TOC16_HA)
6972 else if (r_type == elfcpp::R_PPC64_TOC16_LO_DS)
6974 // Need to check that the insn is a ld
6976 view = ppc_object->section_contents(data_shndx,
6979 section_size_type off =
6980 (convert_to_section_size_type(reloc.get_r_offset())
6981 + (big_endian ? -2 : 3));
6983 && (view[off] & (0x3f << 2)) == 58u << 2)
6987 ppc_object->set_no_toc_opt(dst_off);
6998 case elfcpp::R_POWERPC_REL32:
6999 if (ppc_object->got2_shndx() != 0
7000 && parameters->options().output_is_position_independent())
7002 unsigned int shndx = lsym.get_st_shndx();
7003 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
7005 shndx = ppc_object->adjust_sym_shndx(r_sym, shndx, &is_ordinary);
7006 if (is_ordinary && shndx == ppc_object->got2_shndx()
7007 && (ppc_object->section_flags(data_shndx)
7008 & elfcpp::SHF_EXECINSTR) != 0)
7009 gold_error(_("%s: unsupported -mbss-plt code"),
7010 ppc_object->name().c_str());
7020 case elfcpp::R_POWERPC_GOT_TLSLD16:
7021 case elfcpp::R_POWERPC_GOT_TLSGD16:
7022 case elfcpp::R_POWERPC_GOT_TPREL16:
7023 case elfcpp::R_POWERPC_GOT_DTPREL16:
7024 case elfcpp::R_POWERPC_GOT16:
7025 case elfcpp::R_PPC64_GOT16_DS:
7026 case elfcpp::R_PPC64_TOC16:
7027 case elfcpp::R_PPC64_TOC16_DS:
7028 ppc_object->set_has_small_toc_reloc();
7034 // Report an unsupported relocation against a global symbol.
7036 template<int size, bool big_endian>
7038 Target_powerpc<size, big_endian>::Scan::unsupported_reloc_global(
7039 Sized_relobj_file<size, big_endian>* object,
7040 unsigned int r_type,
7043 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
7044 object->name().c_str(), r_type, gsym->demangled_name().c_str());
7047 // Scan a relocation for a global symbol.
7049 template<int size, bool big_endian>
7051 Target_powerpc<size, big_endian>::Scan::global(
7052 Symbol_table* symtab,
7054 Target_powerpc<size, big_endian>* target,
7055 Sized_relobj_file<size, big_endian>* object,
7056 unsigned int data_shndx,
7057 Output_section* output_section,
7058 const elfcpp::Rela<size, big_endian>& reloc,
7059 unsigned int r_type,
7062 if (this->maybe_skip_tls_get_addr_call(target, r_type, gsym)
7066 if (target->replace_tls_get_addr(gsym))
7067 // Change a __tls_get_addr reference to __tls_get_addr_opt
7068 // so dynamic relocs are emitted against the latter symbol.
7069 gsym = target->tls_get_addr_opt();
7071 if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD)
7072 || (size == 32 && r_type == elfcpp::R_PPC_TLSGD))
7074 this->expect_tls_get_addr_call();
7075 const bool final = gsym->final_value_is_known();
7076 const tls::Tls_optimization tls_type = target->optimize_tls_gd(final);
7077 if (tls_type != tls::TLSOPT_NONE)
7078 this->skip_next_tls_get_addr_call();
7080 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD)
7081 || (size == 32 && r_type == elfcpp::R_PPC_TLSLD))
7083 this->expect_tls_get_addr_call();
7084 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
7085 if (tls_type != tls::TLSOPT_NONE)
7086 this->skip_next_tls_get_addr_call();
7089 Powerpc_relobj<size, big_endian>* ppc_object
7090 = static_cast<Powerpc_relobj<size, big_endian>*>(object);
7092 // A STT_GNU_IFUNC symbol may require a PLT entry.
7093 bool is_ifunc = gsym->type() == elfcpp::STT_GNU_IFUNC;
7094 bool pushed_ifunc = false;
7095 if (is_ifunc && this->reloc_needs_plt_for_ifunc(target, object, r_type, true))
7097 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
7098 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
7099 r_type, r_sym, reloc.get_r_addend());
7100 target->make_plt_entry(symtab, layout, gsym);
7101 pushed_ifunc = true;
7106 case elfcpp::R_POWERPC_NONE:
7107 case elfcpp::R_POWERPC_GNU_VTINHERIT:
7108 case elfcpp::R_POWERPC_GNU_VTENTRY:
7109 case elfcpp::R_PPC_LOCAL24PC:
7110 case elfcpp::R_POWERPC_TLS:
7111 case elfcpp::R_PPC64_ENTRY:
7114 case elfcpp::R_PPC64_TOC:
7116 Output_data_got_powerpc<size, big_endian>* got
7117 = target->got_section(symtab, layout);
7118 if (parameters->options().output_is_position_independent())
7120 Address off = reloc.get_r_offset();
7122 && data_shndx == ppc_object->opd_shndx()
7123 && ppc_object->get_opd_discard(off - 8))
7126 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
7127 Powerpc_relobj<size, big_endian>* symobj = ppc_object;
7128 if (data_shndx != ppc_object->opd_shndx())
7129 symobj = static_cast
7130 <Powerpc_relobj<size, big_endian>*>(gsym->object());
7131 rela_dyn->add_output_section_relative(got->output_section(),
7132 elfcpp::R_POWERPC_RELATIVE,
7134 object, data_shndx, off,
7135 symobj->toc_base_offset());
7140 case elfcpp::R_PPC64_ADDR64:
7142 && target->abiversion() < 2
7143 && data_shndx == ppc_object->opd_shndx()
7144 && (gsym->is_defined_in_discarded_section()
7145 || gsym->object() != object))
7147 ppc_object->set_opd_discard(reloc.get_r_offset());
7151 case elfcpp::R_PPC64_UADDR64:
7152 case elfcpp::R_POWERPC_ADDR32:
7153 case elfcpp::R_POWERPC_UADDR32:
7154 case elfcpp::R_POWERPC_ADDR24:
7155 case elfcpp::R_POWERPC_ADDR16:
7156 case elfcpp::R_POWERPC_ADDR16_LO:
7157 case elfcpp::R_POWERPC_ADDR16_HI:
7158 case elfcpp::R_POWERPC_ADDR16_HA:
7159 case elfcpp::R_POWERPC_UADDR16:
7160 case elfcpp::R_PPC64_ADDR16_HIGH:
7161 case elfcpp::R_PPC64_ADDR16_HIGHA:
7162 case elfcpp::R_PPC64_ADDR16_HIGHER:
7163 case elfcpp::R_PPC64_ADDR16_HIGHERA:
7164 case elfcpp::R_PPC64_ADDR16_HIGHEST:
7165 case elfcpp::R_PPC64_ADDR16_HIGHESTA:
7166 case elfcpp::R_PPC64_ADDR16_DS:
7167 case elfcpp::R_PPC64_ADDR16_LO_DS:
7168 case elfcpp::R_POWERPC_ADDR14:
7169 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
7170 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
7172 // Make a PLT entry if necessary.
7173 if (gsym->needs_plt_entry())
7175 // Since this is not a PC-relative relocation, we may be
7176 // taking the address of a function. In that case we need to
7177 // set the entry in the dynamic symbol table to the address of
7178 // the PLT call stub.
7179 bool need_ifunc_plt = false;
7180 if ((size == 32 || target->abiversion() >= 2)
7181 && gsym->is_from_dynobj()
7182 && !parameters->options().output_is_position_independent())
7184 gsym->set_needs_dynsym_value();
7185 need_ifunc_plt = true;
7187 if (!is_ifunc || (!pushed_ifunc && need_ifunc_plt))
7189 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
7190 target->push_branch(ppc_object, data_shndx,
7191 reloc.get_r_offset(), r_type, r_sym,
7192 reloc.get_r_addend());
7193 target->make_plt_entry(symtab, layout, gsym);
7196 // Make a dynamic relocation if necessary.
7197 if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type, target))
7198 || (size == 64 && is_ifunc && target->abiversion() < 2))
7200 if (!parameters->options().output_is_position_independent()
7201 && gsym->may_need_copy_reloc())
7203 target->copy_reloc(symtab, layout, object,
7204 data_shndx, output_section, gsym, reloc);
7206 else if ((((size == 32
7207 && r_type == elfcpp::R_POWERPC_ADDR32)
7209 && r_type == elfcpp::R_PPC64_ADDR64
7210 && target->abiversion() >= 2))
7211 && gsym->can_use_relative_reloc(false)
7212 && !(gsym->visibility() == elfcpp::STV_PROTECTED
7213 && parameters->options().shared()))
7215 && r_type == elfcpp::R_PPC64_ADDR64
7216 && target->abiversion() < 2
7217 && (gsym->can_use_relative_reloc(false)
7218 || data_shndx == ppc_object->opd_shndx())))
7220 Reloc_section* rela_dyn
7221 = target->rela_dyn_section(symtab, layout, is_ifunc);
7222 unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE
7223 : elfcpp::R_POWERPC_RELATIVE);
7224 rela_dyn->add_symbolless_global_addend(
7225 gsym, dynrel, output_section, object, data_shndx,
7226 reloc.get_r_offset(), reloc.get_r_addend());
7230 Reloc_section* rela_dyn
7231 = target->rela_dyn_section(symtab, layout, is_ifunc);
7232 check_non_pic(object, r_type);
7233 rela_dyn->add_global(gsym, r_type, output_section,
7235 reloc.get_r_offset(),
7236 reloc.get_r_addend());
7239 && parameters->options().toc_optimize()
7240 && data_shndx == ppc_object->toc_shndx())
7241 ppc_object->set_no_toc_opt(reloc.get_r_offset());
7247 case elfcpp::R_PPC_PLTREL24:
7248 case elfcpp::R_POWERPC_REL24:
7251 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
7252 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
7253 r_type, r_sym, reloc.get_r_addend());
7254 if (gsym->needs_plt_entry()
7255 || (!gsym->final_value_is_known()
7256 && (gsym->is_undefined()
7257 || gsym->is_from_dynobj()
7258 || gsym->is_preemptible())))
7259 target->make_plt_entry(symtab, layout, gsym);
7263 case elfcpp::R_PPC64_REL64:
7264 case elfcpp::R_POWERPC_REL32:
7265 // Make a dynamic relocation if necessary.
7266 if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type, target)))
7268 if (!parameters->options().output_is_position_independent()
7269 && gsym->may_need_copy_reloc())
7271 target->copy_reloc(symtab, layout, object,
7272 data_shndx, output_section, gsym,
7277 Reloc_section* rela_dyn
7278 = target->rela_dyn_section(symtab, layout, is_ifunc);
7279 check_non_pic(object, r_type);
7280 rela_dyn->add_global(gsym, r_type, output_section, object,
7281 data_shndx, reloc.get_r_offset(),
7282 reloc.get_r_addend());
7287 case elfcpp::R_POWERPC_REL14:
7288 case elfcpp::R_POWERPC_REL14_BRTAKEN:
7289 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
7292 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
7293 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
7294 r_type, r_sym, reloc.get_r_addend());
7298 case elfcpp::R_PPC64_TOCSAVE:
7299 // R_PPC64_TOCSAVE follows a call instruction to indicate the
7300 // caller has already saved r2 and thus a plt call stub need not
7303 && target->mark_pltcall(ppc_object, data_shndx,
7304 reloc.get_r_offset() - 4, symtab))
7306 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
7308 unsigned int shndx = gsym->shndx(&is_ordinary);
7310 object->error(_("tocsave symbol %u has bad shndx %u"),
7314 Sized_symbol<size>* sym = symtab->get_sized_symbol<size>(gsym);
7315 target->add_tocsave(ppc_object, shndx,
7316 sym->value() + reloc.get_r_addend());
7321 case elfcpp::R_POWERPC_REL16:
7322 case elfcpp::R_POWERPC_REL16_LO:
7323 case elfcpp::R_POWERPC_REL16_HI:
7324 case elfcpp::R_POWERPC_REL16_HA:
7325 case elfcpp::R_POWERPC_REL16DX_HA:
7326 case elfcpp::R_POWERPC_SECTOFF:
7327 case elfcpp::R_POWERPC_SECTOFF_LO:
7328 case elfcpp::R_POWERPC_SECTOFF_HI:
7329 case elfcpp::R_POWERPC_SECTOFF_HA:
7330 case elfcpp::R_PPC64_SECTOFF_DS:
7331 case elfcpp::R_PPC64_SECTOFF_LO_DS:
7332 case elfcpp::R_POWERPC_TPREL16:
7333 case elfcpp::R_POWERPC_TPREL16_LO:
7334 case elfcpp::R_POWERPC_TPREL16_HI:
7335 case elfcpp::R_POWERPC_TPREL16_HA:
7336 case elfcpp::R_PPC64_TPREL16_DS:
7337 case elfcpp::R_PPC64_TPREL16_LO_DS:
7338 case elfcpp::R_PPC64_TPREL16_HIGH:
7339 case elfcpp::R_PPC64_TPREL16_HIGHA:
7340 case elfcpp::R_PPC64_TPREL16_HIGHER:
7341 case elfcpp::R_PPC64_TPREL16_HIGHERA:
7342 case elfcpp::R_PPC64_TPREL16_HIGHEST:
7343 case elfcpp::R_PPC64_TPREL16_HIGHESTA:
7344 case elfcpp::R_POWERPC_DTPREL16:
7345 case elfcpp::R_POWERPC_DTPREL16_LO:
7346 case elfcpp::R_POWERPC_DTPREL16_HI:
7347 case elfcpp::R_POWERPC_DTPREL16_HA:
7348 case elfcpp::R_PPC64_DTPREL16_DS:
7349 case elfcpp::R_PPC64_DTPREL16_LO_DS:
7350 case elfcpp::R_PPC64_DTPREL16_HIGH:
7351 case elfcpp::R_PPC64_DTPREL16_HIGHA:
7352 case elfcpp::R_PPC64_DTPREL16_HIGHER:
7353 case elfcpp::R_PPC64_DTPREL16_HIGHERA:
7354 case elfcpp::R_PPC64_DTPREL16_HIGHEST:
7355 case elfcpp::R_PPC64_DTPREL16_HIGHESTA:
7356 case elfcpp::R_PPC64_TLSGD:
7357 case elfcpp::R_PPC64_TLSLD:
7358 case elfcpp::R_PPC64_ADDR64_LOCAL:
7361 case elfcpp::R_POWERPC_GOT16:
7362 case elfcpp::R_POWERPC_GOT16_LO:
7363 case elfcpp::R_POWERPC_GOT16_HI:
7364 case elfcpp::R_POWERPC_GOT16_HA:
7365 case elfcpp::R_PPC64_GOT16_DS:
7366 case elfcpp::R_PPC64_GOT16_LO_DS:
7368 // The symbol requires a GOT entry.
7369 Output_data_got_powerpc<size, big_endian>* got;
7371 got = target->got_section(symtab, layout);
7372 if (gsym->final_value_is_known())
7375 && (size == 32 || target->abiversion() >= 2))
7376 got->add_global_plt(gsym, GOT_TYPE_STANDARD);
7378 got->add_global(gsym, GOT_TYPE_STANDARD);
7380 else if (!gsym->has_got_offset(GOT_TYPE_STANDARD))
7382 // If we are generating a shared object or a pie, this
7383 // symbol's GOT entry will be set by a dynamic relocation.
7384 unsigned int off = got->add_constant(0);
7385 gsym->set_got_offset(GOT_TYPE_STANDARD, off);
7387 Reloc_section* rela_dyn
7388 = target->rela_dyn_section(symtab, layout, is_ifunc);
7390 if (gsym->can_use_relative_reloc(false)
7392 || target->abiversion() >= 2)
7393 && gsym->visibility() == elfcpp::STV_PROTECTED
7394 && parameters->options().shared()))
7396 unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE
7397 : elfcpp::R_POWERPC_RELATIVE);
7398 rela_dyn->add_global_relative(gsym, dynrel, got, off, 0, false);
7402 unsigned int dynrel = elfcpp::R_POWERPC_GLOB_DAT;
7403 rela_dyn->add_global(gsym, dynrel, got, off, 0);
7409 case elfcpp::R_PPC64_TOC16:
7410 case elfcpp::R_PPC64_TOC16_LO:
7411 case elfcpp::R_PPC64_TOC16_HI:
7412 case elfcpp::R_PPC64_TOC16_HA:
7413 case elfcpp::R_PPC64_TOC16_DS:
7414 case elfcpp::R_PPC64_TOC16_LO_DS:
7415 // We need a GOT section.
7416 target->got_section(symtab, layout);
7419 case elfcpp::R_POWERPC_GOT_TLSGD16:
7420 case elfcpp::R_POWERPC_GOT_TLSGD16_LO:
7421 case elfcpp::R_POWERPC_GOT_TLSGD16_HI:
7422 case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
7424 const bool final = gsym->final_value_is_known();
7425 const tls::Tls_optimization tls_type = target->optimize_tls_gd(final);
7426 if (tls_type == tls::TLSOPT_NONE)
7428 Output_data_got_powerpc<size, big_endian>* got
7429 = target->got_section(symtab, layout);
7430 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
7431 got->add_global_pair_with_rel(gsym, GOT_TYPE_TLSGD, rela_dyn,
7432 elfcpp::R_POWERPC_DTPMOD,
7433 elfcpp::R_POWERPC_DTPREL);
7435 else if (tls_type == tls::TLSOPT_TO_IE)
7437 if (!gsym->has_got_offset(GOT_TYPE_TPREL))
7439 Output_data_got_powerpc<size, big_endian>* got
7440 = target->got_section(symtab, layout);
7441 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
7442 if (gsym->is_undefined()
7443 || gsym->is_from_dynobj())
7445 got->add_global_with_rel(gsym, GOT_TYPE_TPREL, rela_dyn,
7446 elfcpp::R_POWERPC_TPREL);
7450 unsigned int off = got->add_constant(0);
7451 gsym->set_got_offset(GOT_TYPE_TPREL, off);
7452 unsigned int dynrel = elfcpp::R_POWERPC_TPREL;
7453 rela_dyn->add_symbolless_global_addend(gsym, dynrel,
7458 else if (tls_type == tls::TLSOPT_TO_LE)
7460 // no GOT relocs needed for Local Exec.
7467 case elfcpp::R_POWERPC_GOT_TLSLD16:
7468 case elfcpp::R_POWERPC_GOT_TLSLD16_LO:
7469 case elfcpp::R_POWERPC_GOT_TLSLD16_HI:
7470 case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
7472 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
7473 if (tls_type == tls::TLSOPT_NONE)
7474 target->tlsld_got_offset(symtab, layout, object);
7475 else if (tls_type == tls::TLSOPT_TO_LE)
7477 // no GOT relocs needed for Local Exec.
7478 if (parameters->options().emit_relocs())
7480 Output_section* os = layout->tls_segment()->first_section();
7481 gold_assert(os != NULL);
7482 os->set_needs_symtab_index();
7490 case elfcpp::R_POWERPC_GOT_DTPREL16:
7491 case elfcpp::R_POWERPC_GOT_DTPREL16_LO:
7492 case elfcpp::R_POWERPC_GOT_DTPREL16_HI:
7493 case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
7495 Output_data_got_powerpc<size, big_endian>* got
7496 = target->got_section(symtab, layout);
7497 if (!gsym->final_value_is_known()
7498 && (gsym->is_from_dynobj()
7499 || gsym->is_undefined()
7500 || gsym->is_preemptible()))
7501 got->add_global_with_rel(gsym, GOT_TYPE_DTPREL,
7502 target->rela_dyn_section(layout),
7503 elfcpp::R_POWERPC_DTPREL);
7505 got->add_global_tls(gsym, GOT_TYPE_DTPREL);
7509 case elfcpp::R_POWERPC_GOT_TPREL16:
7510 case elfcpp::R_POWERPC_GOT_TPREL16_LO:
7511 case elfcpp::R_POWERPC_GOT_TPREL16_HI:
7512 case elfcpp::R_POWERPC_GOT_TPREL16_HA:
7514 const bool final = gsym->final_value_is_known();
7515 const tls::Tls_optimization tls_type = target->optimize_tls_ie(final);
7516 if (tls_type == tls::TLSOPT_NONE)
7518 if (!gsym->has_got_offset(GOT_TYPE_TPREL))
7520 Output_data_got_powerpc<size, big_endian>* got
7521 = target->got_section(symtab, layout);
7522 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
7523 if (gsym->is_undefined()
7524 || gsym->is_from_dynobj())
7526 got->add_global_with_rel(gsym, GOT_TYPE_TPREL, rela_dyn,
7527 elfcpp::R_POWERPC_TPREL);
7531 unsigned int off = got->add_constant(0);
7532 gsym->set_got_offset(GOT_TYPE_TPREL, off);
7533 unsigned int dynrel = elfcpp::R_POWERPC_TPREL;
7534 rela_dyn->add_symbolless_global_addend(gsym, dynrel,
7539 else if (tls_type == tls::TLSOPT_TO_LE)
7541 // no GOT relocs needed for Local Exec.
7549 unsupported_reloc_global(object, r_type, gsym);
7554 && parameters->options().toc_optimize())
7556 if (data_shndx == ppc_object->toc_shndx())
7559 if (r_type != elfcpp::R_PPC64_ADDR64
7560 || (is_ifunc && target->abiversion() < 2))
7562 else if (parameters->options().output_is_position_independent()
7563 && (is_ifunc || gsym->is_absolute() || gsym->is_undefined()))
7566 ppc_object->set_no_toc_opt(reloc.get_r_offset());
7569 enum {no_check, check_lo, check_ha} insn_check;
7573 insn_check = no_check;
7576 case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
7577 case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
7578 case elfcpp::R_POWERPC_GOT_TPREL16_HA:
7579 case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
7580 case elfcpp::R_POWERPC_GOT16_HA:
7581 case elfcpp::R_PPC64_TOC16_HA:
7582 insn_check = check_ha;
7585 case elfcpp::R_POWERPC_GOT_TLSLD16_LO:
7586 case elfcpp::R_POWERPC_GOT_TLSGD16_LO:
7587 case elfcpp::R_POWERPC_GOT_TPREL16_LO:
7588 case elfcpp::R_POWERPC_GOT_DTPREL16_LO:
7589 case elfcpp::R_POWERPC_GOT16_LO:
7590 case elfcpp::R_PPC64_GOT16_LO_DS:
7591 case elfcpp::R_PPC64_TOC16_LO:
7592 case elfcpp::R_PPC64_TOC16_LO_DS:
7593 insn_check = check_lo;
7597 section_size_type slen;
7598 const unsigned char* view = NULL;
7599 if (insn_check != no_check)
7601 view = ppc_object->section_contents(data_shndx, &slen, false);
7602 section_size_type off =
7603 convert_to_section_size_type(reloc.get_r_offset()) & -4;
7606 uint32_t insn = elfcpp::Swap<32, big_endian>::readval(view + off);
7607 if (insn_check == check_lo
7608 ? !ok_lo_toc_insn(insn, r_type)
7609 : ((insn & ((0x3f << 26) | 0x1f << 16))
7610 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
7612 ppc_object->set_no_toc_opt();
7613 gold_warning(_("%s: toc optimization is not supported "
7614 "for %#08x instruction"),
7615 ppc_object->name().c_str(), insn);
7624 case elfcpp::R_PPC64_TOC16:
7625 case elfcpp::R_PPC64_TOC16_LO:
7626 case elfcpp::R_PPC64_TOC16_HI:
7627 case elfcpp::R_PPC64_TOC16_HA:
7628 case elfcpp::R_PPC64_TOC16_DS:
7629 case elfcpp::R_PPC64_TOC16_LO_DS:
7630 if (gsym->source() == Symbol::FROM_OBJECT
7631 && !gsym->object()->is_dynamic())
7633 Powerpc_relobj<size, big_endian>* sym_object
7634 = static_cast<Powerpc_relobj<size, big_endian>*>(gsym->object());
7636 unsigned int shndx = gsym->shndx(&is_ordinary);
7637 if (shndx == sym_object->toc_shndx())
7639 Sized_symbol<size>* sym = symtab->get_sized_symbol<size>(gsym);
7640 Address dst_off = sym->value() + reloc.get_r_addend();
7641 if (dst_off < sym_object->section_size(shndx))
7644 if (r_type == elfcpp::R_PPC64_TOC16_HA)
7646 else if (r_type == elfcpp::R_PPC64_TOC16_LO_DS)
7648 // Need to check that the insn is a ld
7650 view = ppc_object->section_contents(data_shndx,
7653 section_size_type off =
7654 (convert_to_section_size_type(reloc.get_r_offset())
7655 + (big_endian ? -2 : 3));
7657 && (view[off] & (0x3f << 2)) == (58u << 2))
7661 sym_object->set_no_toc_opt(dst_off);
7673 case elfcpp::R_PPC_LOCAL24PC:
7674 if (strcmp(gsym->name(), "_GLOBAL_OFFSET_TABLE_") == 0)
7675 gold_error(_("%s: unsupported -mbss-plt code"),
7676 ppc_object->name().c_str());
7685 case elfcpp::R_POWERPC_GOT_TLSLD16:
7686 case elfcpp::R_POWERPC_GOT_TLSGD16:
7687 case elfcpp::R_POWERPC_GOT_TPREL16:
7688 case elfcpp::R_POWERPC_GOT_DTPREL16:
7689 case elfcpp::R_POWERPC_GOT16:
7690 case elfcpp::R_PPC64_GOT16_DS:
7691 case elfcpp::R_PPC64_TOC16:
7692 case elfcpp::R_PPC64_TOC16_DS:
7693 ppc_object->set_has_small_toc_reloc();
7699 // Process relocations for gc.
7701 template<int size, bool big_endian>
7703 Target_powerpc<size, big_endian>::gc_process_relocs(
7704 Symbol_table* symtab,
7706 Sized_relobj_file<size, big_endian>* object,
7707 unsigned int data_shndx,
7709 const unsigned char* prelocs,
7711 Output_section* output_section,
7712 bool needs_special_offset_handling,
7713 size_t local_symbol_count,
7714 const unsigned char* plocal_symbols)
7716 typedef Target_powerpc<size, big_endian> Powerpc;
7717 typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian>
7720 Powerpc_relobj<size, big_endian>* ppc_object
7721 = static_cast<Powerpc_relobj<size, big_endian>*>(object);
7723 ppc_object->set_opd_valid();
7724 if (size == 64 && data_shndx == ppc_object->opd_shndx())
7726 typename Powerpc_relobj<size, big_endian>::Access_from::iterator p;
7727 for (p = ppc_object->access_from_map()->begin();
7728 p != ppc_object->access_from_map()->end();
7731 Address dst_off = p->first;
7732 unsigned int dst_indx = ppc_object->get_opd_ent(dst_off);
7733 typename Powerpc_relobj<size, big_endian>::Section_refs::iterator s;
7734 for (s = p->second.begin(); s != p->second.end(); ++s)
7736 Relobj* src_obj = s->first;
7737 unsigned int src_indx = s->second;
7738 symtab->gc()->add_reference(src_obj, src_indx,
7739 ppc_object, dst_indx);
7743 ppc_object->access_from_map()->clear();
7744 ppc_object->process_gc_mark(symtab);
7745 // Don't look at .opd relocs as .opd will reference everything.
7749 gold::gc_process_relocs<size, big_endian, Powerpc, Scan, Classify_reloc>(
7758 needs_special_offset_handling,
7763 // Handle target specific gc actions when adding a gc reference from
7764 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
7765 // and DST_OFF. For powerpc64, this adds a referenc to the code
7766 // section of a function descriptor.
7768 template<int size, bool big_endian>
7770 Target_powerpc<size, big_endian>::do_gc_add_reference(
7771 Symbol_table* symtab,
7773 unsigned int src_shndx,
7775 unsigned int dst_shndx,
7776 Address dst_off) const
7778 if (size != 64 || dst_obj->is_dynamic())
7781 Powerpc_relobj<size, big_endian>* ppc_object
7782 = static_cast<Powerpc_relobj<size, big_endian>*>(dst_obj);
7783 if (dst_shndx != 0 && dst_shndx == ppc_object->opd_shndx())
7785 if (ppc_object->opd_valid())
7787 dst_shndx = ppc_object->get_opd_ent(dst_off);
7788 symtab->gc()->add_reference(src_obj, src_shndx, dst_obj, dst_shndx);
7792 // If we haven't run scan_opd_relocs, we must delay
7793 // processing this function descriptor reference.
7794 ppc_object->add_reference(src_obj, src_shndx, dst_off);
7799 // Add any special sections for this symbol to the gc work list.
7800 // For powerpc64, this adds the code section of a function
7803 template<int size, bool big_endian>
7805 Target_powerpc<size, big_endian>::do_gc_mark_symbol(
7806 Symbol_table* symtab,
7811 Powerpc_relobj<size, big_endian>* ppc_object
7812 = static_cast<Powerpc_relobj<size, big_endian>*>(sym->object());
7814 unsigned int shndx = sym->shndx(&is_ordinary);
7815 if (is_ordinary && shndx != 0 && shndx == ppc_object->opd_shndx())
7817 Sized_symbol<size>* gsym = symtab->get_sized_symbol<size>(sym);
7818 Address dst_off = gsym->value();
7819 if (ppc_object->opd_valid())
7821 unsigned int dst_indx = ppc_object->get_opd_ent(dst_off);
7822 symtab->gc()->worklist().push_back(Section_id(ppc_object,
7826 ppc_object->add_gc_mark(dst_off);
7831 // For a symbol location in .opd, set LOC to the location of the
7834 template<int size, bool big_endian>
7836 Target_powerpc<size, big_endian>::do_function_location(
7837 Symbol_location* loc) const
7839 if (size == 64 && loc->shndx != 0)
7841 if (loc->object->is_dynamic())
7843 Powerpc_dynobj<size, big_endian>* ppc_object
7844 = static_cast<Powerpc_dynobj<size, big_endian>*>(loc->object);
7845 if (loc->shndx == ppc_object->opd_shndx())
7848 Address off = loc->offset - ppc_object->opd_address();
7849 loc->shndx = ppc_object->get_opd_ent(off, &dest_off);
7850 loc->offset = dest_off;
7855 const Powerpc_relobj<size, big_endian>* ppc_object
7856 = static_cast<const Powerpc_relobj<size, big_endian>*>(loc->object);
7857 if (loc->shndx == ppc_object->opd_shndx())
7860 loc->shndx = ppc_object->get_opd_ent(loc->offset, &dest_off);
7861 loc->offset = dest_off;
7867 // FNOFFSET in section SHNDX in OBJECT is the start of a function
7868 // compiled with -fsplit-stack. The function calls non-split-stack
7869 // code. Change the function to ensure it has enough stack space to
7870 // call some random function.
7872 template<int size, bool big_endian>
7874 Target_powerpc<size, big_endian>::do_calls_non_split(
7877 section_offset_type fnoffset,
7878 section_size_type fnsize,
7879 const unsigned char* prelocs,
7881 unsigned char* view,
7882 section_size_type view_size,
7884 std::string* to) const
7886 // 32-bit not supported.
7890 Target::do_calls_non_split(object, shndx, fnoffset, fnsize,
7891 prelocs, reloc_count, view, view_size,
7896 // The function always starts with
7897 // ld %r0,-0x7000-64(%r13) # tcbhead_t.__private_ss
7898 // addis %r12,%r1,-allocate@ha
7899 // addi %r12,%r12,-allocate@l
7901 // but note that the addis or addi may be replaced with a nop
7903 unsigned char *entry = view + fnoffset;
7904 uint32_t insn = elfcpp::Swap<32, big_endian>::readval(entry);
7906 if ((insn & 0xffff0000) == addis_2_12)
7908 /* Skip ELFv2 global entry code. */
7910 insn = elfcpp::Swap<32, big_endian>::readval(entry);
7913 unsigned char *pinsn = entry;
7915 const uint32_t ld_private_ss = 0xe80d8fc0;
7916 if (insn == ld_private_ss)
7918 int32_t allocate = 0;
7922 insn = elfcpp::Swap<32, big_endian>::readval(pinsn);
7923 if ((insn & 0xffff0000) == addis_12_1)
7924 allocate += (insn & 0xffff) << 16;
7925 else if ((insn & 0xffff0000) == addi_12_1
7926 || (insn & 0xffff0000) == addi_12_12)
7927 allocate += ((insn & 0xffff) ^ 0x8000) - 0x8000;
7928 else if (insn != nop)
7931 if (insn == cmpld_7_12_0 && pinsn == entry + 12)
7933 int extra = parameters->options().split_stack_adjust_size();
7935 if (allocate >= 0 || extra < 0)
7937 object->error(_("split-stack stack size overflow at "
7938 "section %u offset %0zx"),
7939 shndx, static_cast<size_t>(fnoffset));
7943 insn = addis_12_1 | (((allocate + 0x8000) >> 16) & 0xffff);
7944 if (insn != addis_12_1)
7946 elfcpp::Swap<32, big_endian>::writeval(pinsn, insn);
7948 insn = addi_12_12 | (allocate & 0xffff);
7949 if (insn != addi_12_12)
7951 elfcpp::Swap<32, big_endian>::writeval(pinsn, insn);
7957 insn = addi_12_1 | (allocate & 0xffff);
7958 elfcpp::Swap<32, big_endian>::writeval(pinsn, insn);
7961 if (pinsn != entry + 12)
7962 elfcpp::Swap<32, big_endian>::writeval(pinsn, nop);
7970 if (!object->has_no_split_stack())
7971 object->error(_("failed to match split-stack sequence at "
7972 "section %u offset %0zx"),
7973 shndx, static_cast<size_t>(fnoffset));
7977 // Scan relocations for a section.
7979 template<int size, bool big_endian>
7981 Target_powerpc<size, big_endian>::scan_relocs(
7982 Symbol_table* symtab,
7984 Sized_relobj_file<size, big_endian>* object,
7985 unsigned int data_shndx,
7986 unsigned int sh_type,
7987 const unsigned char* prelocs,
7989 Output_section* output_section,
7990 bool needs_special_offset_handling,
7991 size_t local_symbol_count,
7992 const unsigned char* plocal_symbols)
7994 typedef Target_powerpc<size, big_endian> Powerpc;
7995 typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian>
7998 if (!this->plt_localentry0_init_)
8000 bool plt_localentry0 = false;
8002 && this->abiversion() >= 2)
8004 if (parameters->options().user_set_plt_localentry())
8005 plt_localentry0 = parameters->options().plt_localentry();
8007 && symtab->lookup("GLIBC_2.26", NULL) == NULL)
8008 gold_warning(_("--plt-localentry is especially dangerous without "
8009 "ld.so support to detect ABI violations"));
8011 this->plt_localentry0_ = plt_localentry0;
8012 this->plt_localentry0_init_ = true;
8015 if (sh_type == elfcpp::SHT_REL)
8017 gold_error(_("%s: unsupported REL reloc section"),
8018 object->name().c_str());
8022 gold::scan_relocs<size, big_endian, Powerpc, Scan, Classify_reloc>(
8031 needs_special_offset_handling,
8036 // Functor class for processing the global symbol table.
8037 // Removes symbols defined on discarded opd entries.
8039 template<bool big_endian>
8040 class Global_symbol_visitor_opd
8043 Global_symbol_visitor_opd()
8047 operator()(Sized_symbol<64>* sym)
8049 if (sym->has_symtab_index()
8050 || sym->source() != Symbol::FROM_OBJECT
8051 || !sym->in_real_elf())
8054 if (sym->object()->is_dynamic())
8057 Powerpc_relobj<64, big_endian>* symobj
8058 = static_cast<Powerpc_relobj<64, big_endian>*>(sym->object());
8059 if (symobj->opd_shndx() == 0)
8063 unsigned int shndx = sym->shndx(&is_ordinary);
8064 if (shndx == symobj->opd_shndx()
8065 && symobj->get_opd_discard(sym->value()))
8067 sym->set_undefined();
8068 sym->set_visibility(elfcpp::STV_DEFAULT);
8069 sym->set_is_defined_in_discarded_section();
8070 sym->set_symtab_index(-1U);
8075 template<int size, bool big_endian>
8077 Target_powerpc<size, big_endian>::define_save_restore_funcs(
8079 Symbol_table* symtab)
8083 Output_data_save_res<size, big_endian>* savres
8084 = new Output_data_save_res<size, big_endian>(symtab);
8085 this->savres_section_ = savres;
8086 layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS,
8087 elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR,
8088 savres, ORDER_TEXT, false);
8092 // Sort linker created .got section first (for the header), then input
8093 // sections belonging to files using small model code.
8095 template<bool big_endian>
8096 class Sort_toc_sections
8100 operator()(const Output_section::Input_section& is1,
8101 const Output_section::Input_section& is2) const
8103 if (!is1.is_input_section() && is2.is_input_section())
8106 = (is1.is_input_section()
8107 && (static_cast<const Powerpc_relobj<64, big_endian>*>(is1.relobj())
8108 ->has_small_toc_reloc()));
8110 = (is2.is_input_section()
8111 && (static_cast<const Powerpc_relobj<64, big_endian>*>(is2.relobj())
8112 ->has_small_toc_reloc()));
8113 return small1 && !small2;
8117 // Finalize the sections.
8119 template<int size, bool big_endian>
8121 Target_powerpc<size, big_endian>::do_finalize_sections(
8123 const Input_objects*,
8124 Symbol_table* symtab)
8126 if (parameters->doing_static_link())
8128 // At least some versions of glibc elf-init.o have a strong
8129 // reference to __rela_iplt marker syms. A weak ref would be
8131 if (this->iplt_ != NULL)
8133 Reloc_section* rel = this->iplt_->rel_plt();
8134 symtab->define_in_output_data("__rela_iplt_start", NULL,
8135 Symbol_table::PREDEFINED, rel, 0, 0,
8136 elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
8137 elfcpp::STV_HIDDEN, 0, false, true);
8138 symtab->define_in_output_data("__rela_iplt_end", NULL,
8139 Symbol_table::PREDEFINED, rel, 0, 0,
8140 elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
8141 elfcpp::STV_HIDDEN, 0, true, true);
8145 symtab->define_as_constant("__rela_iplt_start", NULL,
8146 Symbol_table::PREDEFINED, 0, 0,
8147 elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
8148 elfcpp::STV_HIDDEN, 0, true, false);
8149 symtab->define_as_constant("__rela_iplt_end", NULL,
8150 Symbol_table::PREDEFINED, 0, 0,
8151 elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
8152 elfcpp::STV_HIDDEN, 0, true, false);
8158 typedef Global_symbol_visitor_opd<big_endian> Symbol_visitor;
8159 symtab->for_all_symbols<64, Symbol_visitor>(Symbol_visitor());
8161 if (!parameters->options().relocatable())
8163 this->define_save_restore_funcs(layout, symtab);
8165 // Annoyingly, we need to make these sections now whether or
8166 // not we need them. If we delay until do_relax then we
8167 // need to mess with the relaxation machinery checkpointing.
8168 this->got_section(symtab, layout);
8169 this->make_brlt_section(layout);
8171 if (parameters->options().toc_sort())
8173 Output_section* os = this->got_->output_section();
8174 if (os != NULL && os->input_sections().size() > 1)
8175 std::stable_sort(os->input_sections().begin(),
8176 os->input_sections().end(),
8177 Sort_toc_sections<big_endian>());
8182 // Fill in some more dynamic tags.
8183 Output_data_dynamic* odyn = layout->dynamic_data();
8186 const Reloc_section* rel_plt = (this->plt_ == NULL
8188 : this->plt_->rel_plt());
8189 layout->add_target_dynamic_tags(false, this->plt_, rel_plt,
8190 this->rela_dyn_, true, size == 32);
8194 if (this->got_ != NULL)
8196 this->got_->finalize_data_size();
8197 odyn->add_section_plus_offset(elfcpp::DT_PPC_GOT,
8198 this->got_, this->got_->g_o_t());
8200 if (this->has_tls_get_addr_opt_)
8201 odyn->add_constant(elfcpp::DT_PPC_OPT, elfcpp::PPC_OPT_TLS);
8205 if (this->glink_ != NULL)
8207 this->glink_->finalize_data_size();
8208 odyn->add_section_plus_offset(elfcpp::DT_PPC64_GLINK,
8210 (this->glink_->pltresolve_size()
8213 if (this->has_localentry0_ || this->has_tls_get_addr_opt_)
8214 odyn->add_constant(elfcpp::DT_PPC64_OPT,
8215 ((this->has_localentry0_
8216 ? elfcpp::PPC64_OPT_LOCALENTRY : 0)
8217 | (this->has_tls_get_addr_opt_
8218 ? elfcpp::PPC64_OPT_TLS : 0)));
8222 // Emit any relocs we saved in an attempt to avoid generating COPY
8224 if (this->copy_relocs_.any_saved_relocs())
8225 this->copy_relocs_.emit(this->rela_dyn_section(layout));
8228 // Emit any saved relocs, and mark toc entries using any of these
8229 // relocs as not optimizable.
8231 template<int sh_type, int size, bool big_endian>
8233 Powerpc_copy_relocs<sh_type, size, big_endian>::emit(
8234 Output_data_reloc<sh_type, true, size, big_endian>* reloc_section)
8237 && parameters->options().toc_optimize())
8239 for (typename Copy_relocs<sh_type, size, big_endian>::
8240 Copy_reloc_entries::iterator p = this->entries_.begin();
8241 p != this->entries_.end();
8244 typename Copy_relocs<sh_type, size, big_endian>::Copy_reloc_entry&
8247 // If the symbol is no longer defined in a dynamic object,
8248 // then we emitted a COPY relocation. If it is still
8249 // dynamic then we'll need dynamic relocations and thus
8250 // can't optimize toc entries.
8251 if (entry.sym_->is_from_dynobj())
8253 Powerpc_relobj<size, big_endian>* ppc_object
8254 = static_cast<Powerpc_relobj<size, big_endian>*>(entry.relobj_);
8255 if (entry.shndx_ == ppc_object->toc_shndx())
8256 ppc_object->set_no_toc_opt(entry.address_);
8261 Copy_relocs<sh_type, size, big_endian>::emit(reloc_section);
8264 // Return the value to use for a branch relocation.
8266 template<int size, bool big_endian>
8268 Target_powerpc<size, big_endian>::symval_for_branch(
8269 const Symbol_table* symtab,
8270 const Sized_symbol<size>* gsym,
8271 Powerpc_relobj<size, big_endian>* object,
8273 unsigned int *dest_shndx)
8275 if (size == 32 || this->abiversion() >= 2)
8279 // If the symbol is defined in an opd section, ie. is a function
8280 // descriptor, use the function descriptor code entry address
8281 Powerpc_relobj<size, big_endian>* symobj = object;
8283 && (gsym->source() != Symbol::FROM_OBJECT
8284 || gsym->object()->is_dynamic()))
8287 symobj = static_cast<Powerpc_relobj<size, big_endian>*>(gsym->object());
8288 unsigned int shndx = symobj->opd_shndx();
8291 Address opd_addr = symobj->get_output_section_offset(shndx);
8292 if (opd_addr == invalid_address)
8294 opd_addr += symobj->output_section_address(shndx);
8295 if (*value >= opd_addr && *value < opd_addr + symobj->section_size(shndx))
8298 *dest_shndx = symobj->get_opd_ent(*value - opd_addr, &sec_off);
8299 if (symtab->is_section_folded(symobj, *dest_shndx))
8302 = symtab->icf()->get_folded_section(symobj, *dest_shndx);
8303 symobj = static_cast<Powerpc_relobj<size, big_endian>*>(folded.first);
8304 *dest_shndx = folded.second;
8306 Address sec_addr = symobj->get_output_section_offset(*dest_shndx);
8307 if (sec_addr == invalid_address)
8310 sec_addr += symobj->output_section(*dest_shndx)->address();
8311 *value = sec_addr + sec_off;
8316 // Perform a relocation.
8318 template<int size, bool big_endian>
8320 Target_powerpc<size, big_endian>::Relocate::relocate(
8321 const Relocate_info<size, big_endian>* relinfo,
8323 Target_powerpc* target,
8326 const unsigned char* preloc,
8327 const Sized_symbol<size>* gsym,
8328 const Symbol_value<size>* psymval,
8329 unsigned char* view,
8331 section_size_type view_size)
8336 if (target->replace_tls_get_addr(gsym))
8337 gsym = static_cast<const Sized_symbol<size>*>(target->tls_get_addr_opt());
8339 const elfcpp::Rela<size, big_endian> rela(preloc);
8340 unsigned int r_type = elfcpp::elf_r_type<size>(rela.get_r_info());
8341 switch (this->maybe_skip_tls_get_addr_call(target, r_type, gsym))
8343 case Track_tls::NOT_EXPECTED:
8344 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
8345 _("__tls_get_addr call lacks marker reloc"));
8347 case Track_tls::EXPECTED:
8348 // We have already complained.
8350 case Track_tls::SKIP:
8352 case Track_tls::NORMAL:
8356 typedef Powerpc_relocate_functions<size, big_endian> Reloc;
8357 typedef typename elfcpp::Swap<32, big_endian>::Valtype Insn;
8358 typedef typename elfcpp::Rela<size, big_endian> Reltype;
8359 // Offset from start of insn to d-field reloc.
8360 const int d_offset = big_endian ? 2 : 0;
8362 Powerpc_relobj<size, big_endian>* const object
8363 = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object);
8365 bool has_stub_value = false;
8366 bool localentry0 = false;
8367 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
8369 ? gsym->use_plt_offset(Scan::get_reference_flags(r_type, target))
8370 : object->local_has_plt_offset(r_sym))
8371 && (!psymval->is_ifunc_symbol()
8372 || Scan::reloc_needs_plt_for_ifunc(target, object, r_type, false)))
8376 && target->abiversion() >= 2
8377 && !parameters->options().output_is_position_independent()
8378 && !is_branch_reloc(r_type))
8380 Address off = target->glink_section()->find_global_entry(gsym);
8381 if (off != invalid_address)
8383 value = target->glink_section()->global_entry_address() + off;
8384 has_stub_value = true;
8389 Stub_table<size, big_endian>* stub_table = NULL;
8390 if (target->stub_tables().size() == 1)
8391 stub_table = target->stub_tables()[0];
8392 if (stub_table == NULL
8395 && !parameters->options().output_is_position_independent()
8396 && !is_branch_reloc(r_type)))
8397 stub_table = object->stub_table(relinfo->data_shndx);
8398 if (stub_table == NULL)
8400 // This is a ref from a data section to an ifunc symbol,
8401 // or a non-branch reloc for which we always want to use
8402 // one set of stubs for resolving function addresses.
8403 if (target->stub_tables().size() != 0)
8404 stub_table = target->stub_tables()[0];
8406 if (stub_table != NULL)
8408 const typename Stub_table<size, big_endian>::Plt_stub_ent* ent;
8410 ent = stub_table->find_plt_call_entry(object, gsym, r_type,
8411 rela.get_r_addend());
8413 ent = stub_table->find_plt_call_entry(object, r_sym, r_type,
8414 rela.get_r_addend());
8417 value = stub_table->stub_address() + ent->off_;
8418 const int reloc_size = elfcpp::Elf_sizes<size>::rela_size;
8419 elfcpp::Shdr<size, big_endian> shdr(relinfo->reloc_shdr);
8420 size_t reloc_count = shdr.get_sh_size() / reloc_size;
8423 && relnum + 1 < reloc_count)
8425 Reltype next_rela(preloc + reloc_size);
8426 if (elfcpp::elf_r_type<size>(next_rela.get_r_info())
8427 == elfcpp::R_PPC64_TOCSAVE
8428 && next_rela.get_r_offset() == rela.get_r_offset() + 4)
8431 localentry0 = ent->localentry0_;
8432 has_stub_value = true;
8436 // We don't care too much about bogus debug references to
8437 // non-local functions, but otherwise there had better be a plt
8438 // call stub or global entry stub as appropriate.
8439 gold_assert(has_stub_value || !(os->flags() & elfcpp::SHF_ALLOC));
8442 if (r_type == elfcpp::R_POWERPC_GOT16
8443 || r_type == elfcpp::R_POWERPC_GOT16_LO
8444 || r_type == elfcpp::R_POWERPC_GOT16_HI
8445 || r_type == elfcpp::R_POWERPC_GOT16_HA
8446 || r_type == elfcpp::R_PPC64_GOT16_DS
8447 || r_type == elfcpp::R_PPC64_GOT16_LO_DS)
8451 gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD));
8452 value = gsym->got_offset(GOT_TYPE_STANDARD);
8456 gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD));
8457 value = object->local_got_offset(r_sym, GOT_TYPE_STANDARD);
8459 value -= target->got_section()->got_base_offset(object);
8461 else if (r_type == elfcpp::R_PPC64_TOC)
8463 value = (target->got_section()->output_section()->address()
8464 + object->toc_base_offset());
8466 else if (gsym != NULL
8467 && (r_type == elfcpp::R_POWERPC_REL24
8468 || r_type == elfcpp::R_PPC_PLTREL24)
8473 typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype;
8474 Valtype* wv = reinterpret_cast<Valtype*>(view);
8475 bool can_plt_call = localentry0 || target->is_tls_get_addr_opt(gsym);
8476 if (!can_plt_call && rela.get_r_offset() + 8 <= view_size)
8478 Valtype insn = elfcpp::Swap<32, big_endian>::readval(wv);
8479 Valtype insn2 = elfcpp::Swap<32, big_endian>::readval(wv + 1);
8482 || insn2 == cror_15_15_15 || insn2 == cror_31_31_31))
8484 elfcpp::Swap<32, big_endian>::
8485 writeval(wv + 1, ld_2_1 + target->stk_toc());
8486 can_plt_call = true;
8491 // If we don't have a branch and link followed by a nop,
8492 // we can't go via the plt because there is no place to
8493 // put a toc restoring instruction.
8494 // Unless we know we won't be returning.
8495 if (strcmp(gsym->name(), "__libc_start_main") == 0)
8496 can_plt_call = true;
8500 // g++ as of 20130507 emits self-calls without a
8501 // following nop. This is arguably wrong since we have
8502 // conflicting information. On the one hand a global
8503 // symbol and on the other a local call sequence, but
8504 // don't error for this special case.
8505 // It isn't possible to cheaply verify we have exactly
8506 // such a call. Allow all calls to the same section.
8508 Address code = value;
8509 if (gsym->source() == Symbol::FROM_OBJECT
8510 && gsym->object() == object)
8512 unsigned int dest_shndx = 0;
8513 if (target->abiversion() < 2)
8515 Address addend = rela.get_r_addend();
8516 code = psymval->value(object, addend);
8517 target->symval_for_branch(relinfo->symtab, gsym, object,
8518 &code, &dest_shndx);
8521 if (dest_shndx == 0)
8522 dest_shndx = gsym->shndx(&is_ordinary);
8523 ok = dest_shndx == relinfo->data_shndx;
8527 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
8528 _("call lacks nop, can't restore toc; "
8529 "recompile with -fPIC"));
8535 else if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
8536 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO
8537 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI
8538 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA)
8540 // First instruction of a global dynamic sequence, arg setup insn.
8541 const bool final = gsym == NULL || gsym->final_value_is_known();
8542 const tls::Tls_optimization tls_type = target->optimize_tls_gd(final);
8543 enum Got_type got_type = GOT_TYPE_STANDARD;
8544 if (tls_type == tls::TLSOPT_NONE)
8545 got_type = GOT_TYPE_TLSGD;
8546 else if (tls_type == tls::TLSOPT_TO_IE)
8547 got_type = GOT_TYPE_TPREL;
8548 if (got_type != GOT_TYPE_STANDARD)
8552 gold_assert(gsym->has_got_offset(got_type));
8553 value = gsym->got_offset(got_type);
8557 gold_assert(object->local_has_got_offset(r_sym, got_type));
8558 value = object->local_got_offset(r_sym, got_type);
8560 value -= target->got_section()->got_base_offset(object);
8562 if (tls_type == tls::TLSOPT_TO_IE)
8564 if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
8565 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO)
8567 Insn* iview = reinterpret_cast<Insn*>(view - d_offset);
8568 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
8569 insn &= (1 << 26) - (1 << 16); // extract rt,ra from addi
8571 insn |= 32 << 26; // lwz
8573 insn |= 58 << 26; // ld
8574 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
8576 r_type += (elfcpp::R_POWERPC_GOT_TPREL16
8577 - elfcpp::R_POWERPC_GOT_TLSGD16);
8579 else if (tls_type == tls::TLSOPT_TO_LE)
8581 if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
8582 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO)
8584 Insn* iview = reinterpret_cast<Insn*>(view - d_offset);
8585 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
8586 insn &= (1 << 26) - (1 << 21); // extract rt
8591 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
8592 r_type = elfcpp::R_POWERPC_TPREL16_HA;
8593 value = psymval->value(object, rela.get_r_addend());
8597 Insn* iview = reinterpret_cast<Insn*>(view - d_offset);
8599 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
8600 r_type = elfcpp::R_POWERPC_NONE;
8604 else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16
8605 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO
8606 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI
8607 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA)
8609 // First instruction of a local dynamic sequence, arg setup insn.
8610 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
8611 if (tls_type == tls::TLSOPT_NONE)
8613 value = target->tlsld_got_offset();
8614 value -= target->got_section()->got_base_offset(object);
8618 gold_assert(tls_type == tls::TLSOPT_TO_LE);
8619 if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16
8620 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO)
8622 Insn* iview = reinterpret_cast<Insn*>(view - d_offset);
8623 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
8624 insn &= (1 << 26) - (1 << 21); // extract rt
8629 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
8630 r_type = elfcpp::R_POWERPC_TPREL16_HA;
8635 Insn* iview = reinterpret_cast<Insn*>(view - d_offset);
8637 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
8638 r_type = elfcpp::R_POWERPC_NONE;
8642 else if (r_type == elfcpp::R_POWERPC_GOT_DTPREL16
8643 || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_LO
8644 || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HI
8645 || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HA)
8647 // Accesses relative to a local dynamic sequence address,
8648 // no optimisation here.
8651 gold_assert(gsym->has_got_offset(GOT_TYPE_DTPREL));
8652 value = gsym->got_offset(GOT_TYPE_DTPREL);
8656 gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_DTPREL));
8657 value = object->local_got_offset(r_sym, GOT_TYPE_DTPREL);
8659 value -= target->got_section()->got_base_offset(object);
8661 else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16
8662 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO
8663 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI
8664 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA)
8666 // First instruction of initial exec sequence.
8667 const bool final = gsym == NULL || gsym->final_value_is_known();
8668 const tls::Tls_optimization tls_type = target->optimize_tls_ie(final);
8669 if (tls_type == tls::TLSOPT_NONE)
8673 gold_assert(gsym->has_got_offset(GOT_TYPE_TPREL));
8674 value = gsym->got_offset(GOT_TYPE_TPREL);
8678 gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_TPREL));
8679 value = object->local_got_offset(r_sym, GOT_TYPE_TPREL);
8681 value -= target->got_section()->got_base_offset(object);
8685 gold_assert(tls_type == tls::TLSOPT_TO_LE);
8686 if (r_type == elfcpp::R_POWERPC_GOT_TPREL16
8687 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO)
8689 Insn* iview = reinterpret_cast<Insn*>(view - d_offset);
8690 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
8691 insn &= (1 << 26) - (1 << 21); // extract rt from ld
8696 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
8697 r_type = elfcpp::R_POWERPC_TPREL16_HA;
8698 value = psymval->value(object, rela.get_r_addend());
8702 Insn* iview = reinterpret_cast<Insn*>(view - d_offset);
8704 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
8705 r_type = elfcpp::R_POWERPC_NONE;
8709 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD)
8710 || (size == 32 && r_type == elfcpp::R_PPC_TLSGD))
8712 // Second instruction of a global dynamic sequence,
8713 // the __tls_get_addr call
8714 this->expect_tls_get_addr_call(relinfo, relnum, rela.get_r_offset());
8715 const bool final = gsym == NULL || gsym->final_value_is_known();
8716 const tls::Tls_optimization tls_type = target->optimize_tls_gd(final);
8717 if (tls_type != tls::TLSOPT_NONE)
8719 if (tls_type == tls::TLSOPT_TO_IE)
8721 Insn* iview = reinterpret_cast<Insn*>(view);
8722 Insn insn = add_3_3_13;
8725 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
8726 r_type = elfcpp::R_POWERPC_NONE;
8730 Insn* iview = reinterpret_cast<Insn*>(view);
8731 Insn insn = addi_3_3;
8732 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
8733 r_type = elfcpp::R_POWERPC_TPREL16_LO;
8735 value = psymval->value(object, rela.get_r_addend());
8737 this->skip_next_tls_get_addr_call();
8740 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD)
8741 || (size == 32 && r_type == elfcpp::R_PPC_TLSLD))
8743 // Second instruction of a local dynamic sequence,
8744 // the __tls_get_addr call
8745 this->expect_tls_get_addr_call(relinfo, relnum, rela.get_r_offset());
8746 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
8747 if (tls_type == tls::TLSOPT_TO_LE)
8749 Insn* iview = reinterpret_cast<Insn*>(view);
8750 Insn insn = addi_3_3;
8751 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
8752 this->skip_next_tls_get_addr_call();
8753 r_type = elfcpp::R_POWERPC_TPREL16_LO;
8758 else if (r_type == elfcpp::R_POWERPC_TLS)
8760 // Second instruction of an initial exec sequence
8761 const bool final = gsym == NULL || gsym->final_value_is_known();
8762 const tls::Tls_optimization tls_type = target->optimize_tls_ie(final);
8763 if (tls_type == tls::TLSOPT_TO_LE)
8765 Insn* iview = reinterpret_cast<Insn*>(view);
8766 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
8767 unsigned int reg = size == 32 ? 2 : 13;
8768 insn = at_tls_transform(insn, reg);
8769 gold_assert(insn != 0);
8770 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
8771 r_type = elfcpp::R_POWERPC_TPREL16_LO;
8773 value = psymval->value(object, rela.get_r_addend());
8776 else if (!has_stub_value)
8779 if (!(size == 32 && r_type == elfcpp::R_PPC_PLTREL24))
8780 addend = rela.get_r_addend();
8781 value = psymval->value(object, addend);
8782 if (size == 64 && is_branch_reloc(r_type))
8784 if (target->abiversion() >= 2)
8787 value += object->ppc64_local_entry_offset(gsym);
8789 value += object->ppc64_local_entry_offset(r_sym);
8793 unsigned int dest_shndx;
8794 target->symval_for_branch(relinfo->symtab, gsym, object,
8795 &value, &dest_shndx);
8798 Address max_branch_offset = max_branch_delta(r_type);
8799 if (max_branch_offset != 0
8800 && value - address + max_branch_offset >= 2 * max_branch_offset)
8802 Stub_table<size, big_endian>* stub_table
8803 = object->stub_table(relinfo->data_shndx);
8804 if (stub_table != NULL)
8806 Address off = stub_table->find_long_branch_entry(object, value);
8807 if (off != invalid_address)
8809 value = (stub_table->stub_address() + stub_table->plt_size()
8811 has_stub_value = true;
8819 case elfcpp::R_PPC64_REL64:
8820 case elfcpp::R_POWERPC_REL32:
8821 case elfcpp::R_POWERPC_REL24:
8822 case elfcpp::R_PPC_PLTREL24:
8823 case elfcpp::R_PPC_LOCAL24PC:
8824 case elfcpp::R_POWERPC_REL16:
8825 case elfcpp::R_POWERPC_REL16_LO:
8826 case elfcpp::R_POWERPC_REL16_HI:
8827 case elfcpp::R_POWERPC_REL16_HA:
8828 case elfcpp::R_POWERPC_REL16DX_HA:
8829 case elfcpp::R_POWERPC_REL14:
8830 case elfcpp::R_POWERPC_REL14_BRTAKEN:
8831 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
8835 case elfcpp::R_PPC64_TOC16:
8836 case elfcpp::R_PPC64_TOC16_LO:
8837 case elfcpp::R_PPC64_TOC16_HI:
8838 case elfcpp::R_PPC64_TOC16_HA:
8839 case elfcpp::R_PPC64_TOC16_DS:
8840 case elfcpp::R_PPC64_TOC16_LO_DS:
8841 // Subtract the TOC base address.
8842 value -= (target->got_section()->output_section()->address()
8843 + object->toc_base_offset());
8846 case elfcpp::R_POWERPC_SECTOFF:
8847 case elfcpp::R_POWERPC_SECTOFF_LO:
8848 case elfcpp::R_POWERPC_SECTOFF_HI:
8849 case elfcpp::R_POWERPC_SECTOFF_HA:
8850 case elfcpp::R_PPC64_SECTOFF_DS:
8851 case elfcpp::R_PPC64_SECTOFF_LO_DS:
8853 value -= os->address();
8856 case elfcpp::R_PPC64_TPREL16_DS:
8857 case elfcpp::R_PPC64_TPREL16_LO_DS:
8858 case elfcpp::R_PPC64_TPREL16_HIGH:
8859 case elfcpp::R_PPC64_TPREL16_HIGHA:
8861 // R_PPC_TLSGD, R_PPC_TLSLD, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HI
8864 case elfcpp::R_POWERPC_TPREL16:
8865 case elfcpp::R_POWERPC_TPREL16_LO:
8866 case elfcpp::R_POWERPC_TPREL16_HI:
8867 case elfcpp::R_POWERPC_TPREL16_HA:
8868 case elfcpp::R_POWERPC_TPREL:
8869 case elfcpp::R_PPC64_TPREL16_HIGHER:
8870 case elfcpp::R_PPC64_TPREL16_HIGHERA:
8871 case elfcpp::R_PPC64_TPREL16_HIGHEST:
8872 case elfcpp::R_PPC64_TPREL16_HIGHESTA:
8873 // tls symbol values are relative to tls_segment()->vaddr()
8877 case elfcpp::R_PPC64_DTPREL16_DS:
8878 case elfcpp::R_PPC64_DTPREL16_LO_DS:
8879 case elfcpp::R_PPC64_DTPREL16_HIGHER:
8880 case elfcpp::R_PPC64_DTPREL16_HIGHERA:
8881 case elfcpp::R_PPC64_DTPREL16_HIGHEST:
8882 case elfcpp::R_PPC64_DTPREL16_HIGHESTA:
8884 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO
8885 // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16
8888 case elfcpp::R_POWERPC_DTPREL16:
8889 case elfcpp::R_POWERPC_DTPREL16_LO:
8890 case elfcpp::R_POWERPC_DTPREL16_HI:
8891 case elfcpp::R_POWERPC_DTPREL16_HA:
8892 case elfcpp::R_POWERPC_DTPREL:
8893 case elfcpp::R_PPC64_DTPREL16_HIGH:
8894 case elfcpp::R_PPC64_DTPREL16_HIGHA:
8895 // tls symbol values are relative to tls_segment()->vaddr()
8896 value -= dtp_offset;
8899 case elfcpp::R_PPC64_ADDR64_LOCAL:
8901 value += object->ppc64_local_entry_offset(gsym);
8903 value += object->ppc64_local_entry_offset(r_sym);
8910 Insn branch_bit = 0;
8913 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
8914 case elfcpp::R_POWERPC_REL14_BRTAKEN:
8915 branch_bit = 1 << 21;
8917 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
8918 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
8920 Insn* iview = reinterpret_cast<Insn*>(view);
8921 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
8924 if (this->is_isa_v2)
8926 // Set 'a' bit. This is 0b00010 in BO field for branch
8927 // on CR(BI) insns (BO == 001at or 011at), and 0b01000
8928 // for branch on CTR insns (BO == 1a00t or 1a01t).
8929 if ((insn & (0x14 << 21)) == (0x04 << 21))
8931 else if ((insn & (0x14 << 21)) == (0x10 << 21))
8938 // Invert 'y' bit if not the default.
8939 if (static_cast<Signed_address>(value) < 0)
8942 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
8957 // Multi-instruction sequences that access the GOT/TOC can
8958 // be optimized, eg.
8959 // addis ra,r2,x@got@ha; ld rb,x@got@l(ra);
8960 // to addis ra,r2,x@toc@ha; addi rb,ra,x@toc@l;
8962 // addis ra,r2,0; addi rb,ra,x@toc@l;
8963 // to nop; addi rb,r2,x@toc;
8964 // FIXME: the @got sequence shown above is not yet
8965 // optimized. Note that gcc as of 2017-01-07 doesn't use
8966 // the ELF @got relocs except for TLS, instead using the
8967 // PowerOpen variant of a compiler managed GOT (called TOC).
8968 // The PowerOpen TOC sequence equivalent to the first
8969 // example is optimized.
8970 case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
8971 case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
8972 case elfcpp::R_POWERPC_GOT_TPREL16_HA:
8973 case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
8974 case elfcpp::R_POWERPC_GOT16_HA:
8975 case elfcpp::R_PPC64_TOC16_HA:
8976 if (parameters->options().toc_optimize())
8978 Insn* iview = reinterpret_cast<Insn*>(view - d_offset);
8979 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
8980 if (r_type == elfcpp::R_PPC64_TOC16_HA
8981 && object->make_toc_relative(target, &value))
8983 gold_assert((insn & ((0x3f << 26) | 0x1f << 16))
8984 == ((15u << 26) | (2 << 16)));
8986 if (((insn & ((0x3f << 26) | 0x1f << 16))
8987 == ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
8988 && value + 0x8000 < 0x10000)
8990 elfcpp::Swap<32, big_endian>::writeval(iview, nop);
8996 case elfcpp::R_POWERPC_GOT_TLSLD16_LO:
8997 case elfcpp::R_POWERPC_GOT_TLSGD16_LO:
8998 case elfcpp::R_POWERPC_GOT_TPREL16_LO:
8999 case elfcpp::R_POWERPC_GOT_DTPREL16_LO:
9000 case elfcpp::R_POWERPC_GOT16_LO:
9001 case elfcpp::R_PPC64_GOT16_LO_DS:
9002 case elfcpp::R_PPC64_TOC16_LO:
9003 case elfcpp::R_PPC64_TOC16_LO_DS:
9004 if (parameters->options().toc_optimize())
9006 Insn* iview = reinterpret_cast<Insn*>(view - d_offset);
9007 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
9008 bool changed = false;
9009 if (r_type == elfcpp::R_PPC64_TOC16_LO_DS
9010 && object->make_toc_relative(target, &value))
9012 gold_assert ((insn & (0x3f << 26)) == 58u << 26 /* ld */);
9013 insn ^= (14u << 26) ^ (58u << 26);
9014 r_type = elfcpp::R_PPC64_TOC16_LO;
9017 if (ok_lo_toc_insn(insn, r_type)
9018 && value + 0x8000 < 0x10000)
9020 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
9022 // Transform addic to addi when we change reg.
9023 insn &= ~((0x3f << 26) | (0x1f << 16));
9024 insn |= (14u << 26) | (2 << 16);
9028 insn &= ~(0x1f << 16);
9034 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
9038 case elfcpp::R_POWERPC_TPREL16_HA:
9039 if (parameters->options().tls_optimize() && value + 0x8000 < 0x10000)
9041 Insn* iview = reinterpret_cast<Insn*>(view - d_offset);
9042 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
9043 if ((insn & ((0x3f << 26) | 0x1f << 16))
9044 != ((15u << 26) | ((size == 32 ? 2 : 13) << 16)))
9048 elfcpp::Swap<32, big_endian>::writeval(iview, nop);
9054 case elfcpp::R_PPC64_TPREL16_LO_DS:
9056 // R_PPC_TLSGD, R_PPC_TLSLD
9059 case elfcpp::R_POWERPC_TPREL16_LO:
9060 if (parameters->options().tls_optimize() && value + 0x8000 < 0x10000)
9062 Insn* iview = reinterpret_cast<Insn*>(view - d_offset);
9063 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
9064 insn &= ~(0x1f << 16);
9065 insn |= (size == 32 ? 2 : 13) << 16;
9066 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
9070 case elfcpp::R_PPC64_ENTRY:
9071 value = (target->got_section()->output_section()->address()
9072 + object->toc_base_offset());
9073 if (value + 0x80008000 <= 0xffffffff
9074 && !parameters->options().output_is_position_independent())
9076 Insn* iview = reinterpret_cast<Insn*>(view);
9077 Insn insn1 = elfcpp::Swap<32, big_endian>::readval(iview);
9078 Insn insn2 = elfcpp::Swap<32, big_endian>::readval(iview + 1);
9080 if ((insn1 & ~0xfffc) == ld_2_12
9081 && insn2 == add_2_2_12)
9083 insn1 = lis_2 + ha(value);
9084 elfcpp::Swap<32, big_endian>::writeval(iview, insn1);
9085 insn2 = addi_2_2 + l(value);
9086 elfcpp::Swap<32, big_endian>::writeval(iview + 1, insn2);
9093 if (value + 0x80008000 <= 0xffffffff)
9095 Insn* iview = reinterpret_cast<Insn*>(view);
9096 Insn insn1 = elfcpp::Swap<32, big_endian>::readval(iview);
9097 Insn insn2 = elfcpp::Swap<32, big_endian>::readval(iview + 1);
9099 if ((insn1 & ~0xfffc) == ld_2_12
9100 && insn2 == add_2_2_12)
9102 insn1 = addis_2_12 + ha(value);
9103 elfcpp::Swap<32, big_endian>::writeval(iview, insn1);
9104 insn2 = addi_2_2 + l(value);
9105 elfcpp::Swap<32, big_endian>::writeval(iview + 1, insn2);
9112 case elfcpp::R_POWERPC_REL16_LO:
9113 // If we are generating a non-PIC executable, edit
9114 // 0: addis 2,12,.TOC.-0b@ha
9115 // addi 2,2,.TOC.-0b@l
9116 // used by ELFv2 global entry points to set up r2, to
9119 // if .TOC. is in range. */
9120 if (value + address - 4 + 0x80008000 <= 0xffffffff
9123 && target->abiversion() >= 2
9124 && !parameters->options().output_is_position_independent()
9125 && rela.get_r_addend() == d_offset + 4
9127 && strcmp(gsym->name(), ".TOC.") == 0)
9129 const int reloc_size = elfcpp::Elf_sizes<size>::rela_size;
9130 Reltype prev_rela(preloc - reloc_size);
9131 if ((prev_rela.get_r_info()
9132 == elfcpp::elf_r_info<size>(r_sym,
9133 elfcpp::R_POWERPC_REL16_HA))
9134 && prev_rela.get_r_offset() + 4 == rela.get_r_offset()
9135 && prev_rela.get_r_addend() + 4 == rela.get_r_addend())
9137 Insn* iview = reinterpret_cast<Insn*>(view - d_offset);
9138 Insn insn1 = elfcpp::Swap<32, big_endian>::readval(iview - 1);
9139 Insn insn2 = elfcpp::Swap<32, big_endian>::readval(iview);
9141 if ((insn1 & 0xffff0000) == addis_2_12
9142 && (insn2 & 0xffff0000) == addi_2_2)
9144 insn1 = lis_2 + ha(value + address - 4);
9145 elfcpp::Swap<32, big_endian>::writeval(iview - 1, insn1);
9146 insn2 = addi_2_2 + l(value + address - 4);
9147 elfcpp::Swap<32, big_endian>::writeval(iview, insn2);
9150 relinfo->rr->set_strategy(relnum - 1,
9151 Relocatable_relocs::RELOC_SPECIAL);
9152 relinfo->rr->set_strategy(relnum,
9153 Relocatable_relocs::RELOC_SPECIAL);
9163 typename Reloc::Overflow_check overflow = Reloc::CHECK_NONE;
9164 elfcpp::Shdr<size, big_endian> shdr(relinfo->data_shdr);
9167 case elfcpp::R_POWERPC_ADDR32:
9168 case elfcpp::R_POWERPC_UADDR32:
9170 overflow = Reloc::CHECK_BITFIELD;
9173 case elfcpp::R_POWERPC_REL32:
9174 case elfcpp::R_POWERPC_REL16DX_HA:
9176 overflow = Reloc::CHECK_SIGNED;
9179 case elfcpp::R_POWERPC_UADDR16:
9180 overflow = Reloc::CHECK_BITFIELD;
9183 case elfcpp::R_POWERPC_ADDR16:
9184 // We really should have three separate relocations,
9185 // one for 16-bit data, one for insns with 16-bit signed fields,
9186 // and one for insns with 16-bit unsigned fields.
9187 overflow = Reloc::CHECK_BITFIELD;
9188 if ((shdr.get_sh_flags() & elfcpp::SHF_EXECINSTR) != 0)
9189 overflow = Reloc::CHECK_LOW_INSN;
9192 case elfcpp::R_POWERPC_ADDR16_HI:
9193 case elfcpp::R_POWERPC_ADDR16_HA:
9194 case elfcpp::R_POWERPC_GOT16_HI:
9195 case elfcpp::R_POWERPC_GOT16_HA:
9196 case elfcpp::R_POWERPC_PLT16_HI:
9197 case elfcpp::R_POWERPC_PLT16_HA:
9198 case elfcpp::R_POWERPC_SECTOFF_HI:
9199 case elfcpp::R_POWERPC_SECTOFF_HA:
9200 case elfcpp::R_PPC64_TOC16_HI:
9201 case elfcpp::R_PPC64_TOC16_HA:
9202 case elfcpp::R_PPC64_PLTGOT16_HI:
9203 case elfcpp::R_PPC64_PLTGOT16_HA:
9204 case elfcpp::R_POWERPC_TPREL16_HI:
9205 case elfcpp::R_POWERPC_TPREL16_HA:
9206 case elfcpp::R_POWERPC_DTPREL16_HI:
9207 case elfcpp::R_POWERPC_DTPREL16_HA:
9208 case elfcpp::R_POWERPC_GOT_TLSGD16_HI:
9209 case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
9210 case elfcpp::R_POWERPC_GOT_TLSLD16_HI:
9211 case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
9212 case elfcpp::R_POWERPC_GOT_TPREL16_HI:
9213 case elfcpp::R_POWERPC_GOT_TPREL16_HA:
9214 case elfcpp::R_POWERPC_GOT_DTPREL16_HI:
9215 case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
9216 case elfcpp::R_POWERPC_REL16_HI:
9217 case elfcpp::R_POWERPC_REL16_HA:
9219 overflow = Reloc::CHECK_HIGH_INSN;
9222 case elfcpp::R_POWERPC_REL16:
9223 case elfcpp::R_PPC64_TOC16:
9224 case elfcpp::R_POWERPC_GOT16:
9225 case elfcpp::R_POWERPC_SECTOFF:
9226 case elfcpp::R_POWERPC_TPREL16:
9227 case elfcpp::R_POWERPC_DTPREL16:
9228 case elfcpp::R_POWERPC_GOT_TLSGD16:
9229 case elfcpp::R_POWERPC_GOT_TLSLD16:
9230 case elfcpp::R_POWERPC_GOT_TPREL16:
9231 case elfcpp::R_POWERPC_GOT_DTPREL16:
9232 overflow = Reloc::CHECK_LOW_INSN;
9235 case elfcpp::R_POWERPC_ADDR24:
9236 case elfcpp::R_POWERPC_ADDR14:
9237 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
9238 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
9239 case elfcpp::R_PPC64_ADDR16_DS:
9240 case elfcpp::R_POWERPC_REL24:
9241 case elfcpp::R_PPC_PLTREL24:
9242 case elfcpp::R_PPC_LOCAL24PC:
9243 case elfcpp::R_PPC64_TPREL16_DS:
9244 case elfcpp::R_PPC64_DTPREL16_DS:
9245 case elfcpp::R_PPC64_TOC16_DS:
9246 case elfcpp::R_PPC64_GOT16_DS:
9247 case elfcpp::R_PPC64_SECTOFF_DS:
9248 case elfcpp::R_POWERPC_REL14:
9249 case elfcpp::R_POWERPC_REL14_BRTAKEN:
9250 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
9251 overflow = Reloc::CHECK_SIGNED;
9255 Insn* iview = reinterpret_cast<Insn*>(view - d_offset);
9258 if (overflow == Reloc::CHECK_LOW_INSN
9259 || overflow == Reloc::CHECK_HIGH_INSN)
9261 insn = elfcpp::Swap<32, big_endian>::readval(iview);
9263 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
9264 overflow = Reloc::CHECK_BITFIELD;
9265 else if (overflow == Reloc::CHECK_LOW_INSN
9266 ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */
9267 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
9268 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
9269 : ((insn & (0x3f << 26)) == 29u << 26 /* andis */
9270 || (insn & (0x3f << 26)) == 25u << 26 /* oris */
9271 || (insn & (0x3f << 26)) == 27u << 26 /* xoris */))
9272 overflow = Reloc::CHECK_UNSIGNED;
9274 overflow = Reloc::CHECK_SIGNED;
9277 bool maybe_dq_reloc = false;
9278 typename Powerpc_relocate_functions<size, big_endian>::Status status
9279 = Powerpc_relocate_functions<size, big_endian>::STATUS_OK;
9282 case elfcpp::R_POWERPC_NONE:
9283 case elfcpp::R_POWERPC_TLS:
9284 case elfcpp::R_POWERPC_GNU_VTINHERIT:
9285 case elfcpp::R_POWERPC_GNU_VTENTRY:
9288 case elfcpp::R_PPC64_ADDR64:
9289 case elfcpp::R_PPC64_REL64:
9290 case elfcpp::R_PPC64_TOC:
9291 case elfcpp::R_PPC64_ADDR64_LOCAL:
9292 Reloc::addr64(view, value);
9295 case elfcpp::R_POWERPC_TPREL:
9296 case elfcpp::R_POWERPC_DTPREL:
9298 Reloc::addr64(view, value);
9300 status = Reloc::addr32(view, value, overflow);
9303 case elfcpp::R_PPC64_UADDR64:
9304 Reloc::addr64_u(view, value);
9307 case elfcpp::R_POWERPC_ADDR32:
9308 status = Reloc::addr32(view, value, overflow);
9311 case elfcpp::R_POWERPC_REL32:
9312 case elfcpp::R_POWERPC_UADDR32:
9313 status = Reloc::addr32_u(view, value, overflow);
9316 case elfcpp::R_POWERPC_ADDR24:
9317 case elfcpp::R_POWERPC_REL24:
9318 case elfcpp::R_PPC_PLTREL24:
9319 case elfcpp::R_PPC_LOCAL24PC:
9320 status = Reloc::addr24(view, value, overflow);
9323 case elfcpp::R_POWERPC_GOT_DTPREL16:
9324 case elfcpp::R_POWERPC_GOT_DTPREL16_LO:
9325 case elfcpp::R_POWERPC_GOT_TPREL16:
9326 case elfcpp::R_POWERPC_GOT_TPREL16_LO:
9329 // On ppc64 these are all ds form
9330 maybe_dq_reloc = true;
9334 case elfcpp::R_POWERPC_ADDR16:
9335 case elfcpp::R_POWERPC_REL16:
9336 case elfcpp::R_PPC64_TOC16:
9337 case elfcpp::R_POWERPC_GOT16:
9338 case elfcpp::R_POWERPC_SECTOFF:
9339 case elfcpp::R_POWERPC_TPREL16:
9340 case elfcpp::R_POWERPC_DTPREL16:
9341 case elfcpp::R_POWERPC_GOT_TLSGD16:
9342 case elfcpp::R_POWERPC_GOT_TLSLD16:
9343 case elfcpp::R_POWERPC_ADDR16_LO:
9344 case elfcpp::R_POWERPC_REL16_LO:
9345 case elfcpp::R_PPC64_TOC16_LO:
9346 case elfcpp::R_POWERPC_GOT16_LO:
9347 case elfcpp::R_POWERPC_SECTOFF_LO:
9348 case elfcpp::R_POWERPC_TPREL16_LO:
9349 case elfcpp::R_POWERPC_DTPREL16_LO:
9350 case elfcpp::R_POWERPC_GOT_TLSGD16_LO:
9351 case elfcpp::R_POWERPC_GOT_TLSLD16_LO:
9353 status = Reloc::addr16(view, value, overflow);
9355 maybe_dq_reloc = true;
9358 case elfcpp::R_POWERPC_UADDR16:
9359 status = Reloc::addr16_u(view, value, overflow);
9362 case elfcpp::R_PPC64_ADDR16_HIGH:
9363 case elfcpp::R_PPC64_TPREL16_HIGH:
9364 case elfcpp::R_PPC64_DTPREL16_HIGH:
9366 // R_PPC_EMB_MRKREF, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HA
9369 case elfcpp::R_POWERPC_ADDR16_HI:
9370 case elfcpp::R_POWERPC_REL16_HI:
9371 case elfcpp::R_PPC64_TOC16_HI:
9372 case elfcpp::R_POWERPC_GOT16_HI:
9373 case elfcpp::R_POWERPC_SECTOFF_HI:
9374 case elfcpp::R_POWERPC_TPREL16_HI:
9375 case elfcpp::R_POWERPC_DTPREL16_HI:
9376 case elfcpp::R_POWERPC_GOT_TLSGD16_HI:
9377 case elfcpp::R_POWERPC_GOT_TLSLD16_HI:
9378 case elfcpp::R_POWERPC_GOT_TPREL16_HI:
9379 case elfcpp::R_POWERPC_GOT_DTPREL16_HI:
9380 Reloc::addr16_hi(view, value);
9383 case elfcpp::R_PPC64_ADDR16_HIGHA:
9384 case elfcpp::R_PPC64_TPREL16_HIGHA:
9385 case elfcpp::R_PPC64_DTPREL16_HIGHA:
9387 // R_PPC_EMB_RELSEC16, R_PPC_EMB_RELST_HI, R_PPC_EMB_BIT_FLD
9390 case elfcpp::R_POWERPC_ADDR16_HA:
9391 case elfcpp::R_POWERPC_REL16_HA:
9392 case elfcpp::R_PPC64_TOC16_HA:
9393 case elfcpp::R_POWERPC_GOT16_HA:
9394 case elfcpp::R_POWERPC_SECTOFF_HA:
9395 case elfcpp::R_POWERPC_TPREL16_HA:
9396 case elfcpp::R_POWERPC_DTPREL16_HA:
9397 case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
9398 case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
9399 case elfcpp::R_POWERPC_GOT_TPREL16_HA:
9400 case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
9401 Reloc::addr16_ha(view, value);
9404 case elfcpp::R_POWERPC_REL16DX_HA:
9405 status = Reloc::addr16dx_ha(view, value, overflow);
9408 case elfcpp::R_PPC64_DTPREL16_HIGHER:
9410 // R_PPC_EMB_NADDR16_LO
9413 case elfcpp::R_PPC64_ADDR16_HIGHER:
9414 case elfcpp::R_PPC64_TPREL16_HIGHER:
9415 Reloc::addr16_hi2(view, value);
9418 case elfcpp::R_PPC64_DTPREL16_HIGHERA:
9420 // R_PPC_EMB_NADDR16_HI
9423 case elfcpp::R_PPC64_ADDR16_HIGHERA:
9424 case elfcpp::R_PPC64_TPREL16_HIGHERA:
9425 Reloc::addr16_ha2(view, value);
9428 case elfcpp::R_PPC64_DTPREL16_HIGHEST:
9430 // R_PPC_EMB_NADDR16_HA
9433 case elfcpp::R_PPC64_ADDR16_HIGHEST:
9434 case elfcpp::R_PPC64_TPREL16_HIGHEST:
9435 Reloc::addr16_hi3(view, value);
9438 case elfcpp::R_PPC64_DTPREL16_HIGHESTA:
9443 case elfcpp::R_PPC64_ADDR16_HIGHESTA:
9444 case elfcpp::R_PPC64_TPREL16_HIGHESTA:
9445 Reloc::addr16_ha3(view, value);
9448 case elfcpp::R_PPC64_DTPREL16_DS:
9449 case elfcpp::R_PPC64_DTPREL16_LO_DS:
9451 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16
9454 case elfcpp::R_PPC64_TPREL16_DS:
9455 case elfcpp::R_PPC64_TPREL16_LO_DS:
9457 // R_PPC_TLSGD, R_PPC_TLSLD
9460 case elfcpp::R_PPC64_ADDR16_DS:
9461 case elfcpp::R_PPC64_ADDR16_LO_DS:
9462 case elfcpp::R_PPC64_TOC16_DS:
9463 case elfcpp::R_PPC64_TOC16_LO_DS:
9464 case elfcpp::R_PPC64_GOT16_DS:
9465 case elfcpp::R_PPC64_GOT16_LO_DS:
9466 case elfcpp::R_PPC64_SECTOFF_DS:
9467 case elfcpp::R_PPC64_SECTOFF_LO_DS:
9468 maybe_dq_reloc = true;
9471 case elfcpp::R_POWERPC_ADDR14:
9472 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
9473 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
9474 case elfcpp::R_POWERPC_REL14:
9475 case elfcpp::R_POWERPC_REL14_BRTAKEN:
9476 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
9477 status = Reloc::addr14(view, value, overflow);
9480 case elfcpp::R_POWERPC_COPY:
9481 case elfcpp::R_POWERPC_GLOB_DAT:
9482 case elfcpp::R_POWERPC_JMP_SLOT:
9483 case elfcpp::R_POWERPC_RELATIVE:
9484 case elfcpp::R_POWERPC_DTPMOD:
9485 case elfcpp::R_PPC64_JMP_IREL:
9486 case elfcpp::R_POWERPC_IRELATIVE:
9487 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
9488 _("unexpected reloc %u in object file"),
9492 case elfcpp::R_PPC64_TOCSAVE:
9498 Symbol_location loc;
9499 loc.object = relinfo->object;
9500 loc.shndx = relinfo->data_shndx;
9501 loc.offset = rela.get_r_offset();
9502 Tocsave_loc::const_iterator p = target->tocsave_loc().find(loc);
9503 if (p != target->tocsave_loc().end())
9505 // If we've generated plt calls using this tocsave, then
9506 // the nop needs to be changed to save r2.
9507 Insn* iview = reinterpret_cast<Insn*>(view);
9508 if (elfcpp::Swap<32, big_endian>::readval(iview) == nop)
9509 elfcpp::Swap<32, big_endian>::
9510 writeval(iview, std_2_1 + target->stk_toc());
9515 case elfcpp::R_PPC_EMB_SDA2I16:
9516 case elfcpp::R_PPC_EMB_SDA2REL:
9519 // R_PPC64_TLSGD, R_PPC64_TLSLD
9522 case elfcpp::R_POWERPC_PLT32:
9523 case elfcpp::R_POWERPC_PLTREL32:
9524 case elfcpp::R_POWERPC_PLT16_LO:
9525 case elfcpp::R_POWERPC_PLT16_HI:
9526 case elfcpp::R_POWERPC_PLT16_HA:
9527 case elfcpp::R_PPC_SDAREL16:
9528 case elfcpp::R_POWERPC_ADDR30:
9529 case elfcpp::R_PPC64_PLT64:
9530 case elfcpp::R_PPC64_PLTREL64:
9531 case elfcpp::R_PPC64_PLTGOT16:
9532 case elfcpp::R_PPC64_PLTGOT16_LO:
9533 case elfcpp::R_PPC64_PLTGOT16_HI:
9534 case elfcpp::R_PPC64_PLTGOT16_HA:
9535 case elfcpp::R_PPC64_PLT16_LO_DS:
9536 case elfcpp::R_PPC64_PLTGOT16_DS:
9537 case elfcpp::R_PPC64_PLTGOT16_LO_DS:
9538 case elfcpp::R_PPC_EMB_RELSDA:
9539 case elfcpp::R_PPC_TOC16:
9542 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
9543 _("unsupported reloc %u"),
9551 insn = elfcpp::Swap<32, big_endian>::readval(iview);
9553 if ((insn & (0x3f << 26)) == 56u << 26 /* lq */
9554 || ((insn & (0x3f << 26)) == (61u << 26) /* lxv, stxv */
9555 && (insn & 3) == 1))
9556 status = Reloc::addr16_dq(view, value, overflow);
9558 || (insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
9559 || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
9560 || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */
9561 || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */)
9562 status = Reloc::addr16_ds(view, value, overflow);
9564 status = Reloc::addr16(view, value, overflow);
9567 if (status != Powerpc_relocate_functions<size, big_endian>::STATUS_OK
9570 && gsym->is_undefined()
9571 && is_branch_reloc(r_type))))
9573 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
9574 _("relocation overflow"));
9576 gold_info(_("try relinking with a smaller --stub-group-size"));
9582 // Relocate section data.
9584 template<int size, bool big_endian>
9586 Target_powerpc<size, big_endian>::relocate_section(
9587 const Relocate_info<size, big_endian>* relinfo,
9588 unsigned int sh_type,
9589 const unsigned char* prelocs,
9591 Output_section* output_section,
9592 bool needs_special_offset_handling,
9593 unsigned char* view,
9595 section_size_type view_size,
9596 const Reloc_symbol_changes* reloc_symbol_changes)
9598 typedef Target_powerpc<size, big_endian> Powerpc;
9599 typedef typename Target_powerpc<size, big_endian>::Relocate Powerpc_relocate;
9600 typedef typename Target_powerpc<size, big_endian>::Relocate_comdat_behavior
9601 Powerpc_comdat_behavior;
9602 typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian>
9605 gold_assert(sh_type == elfcpp::SHT_RELA);
9607 gold::relocate_section<size, big_endian, Powerpc, Powerpc_relocate,
9608 Powerpc_comdat_behavior, Classify_reloc>(
9614 needs_special_offset_handling,
9618 reloc_symbol_changes);
9621 template<int size, bool big_endian>
9622 class Powerpc_scan_relocatable_reloc
9625 typedef typename elfcpp::Rela<size, big_endian> Reltype;
9626 static const int reloc_size = elfcpp::Elf_sizes<size>::rela_size;
9627 static const int sh_type = elfcpp::SHT_RELA;
9629 // Return the symbol referred to by the relocation.
9630 static inline unsigned int
9631 get_r_sym(const Reltype* reloc)
9632 { return elfcpp::elf_r_sym<size>(reloc->get_r_info()); }
9634 // Return the type of the relocation.
9635 static inline unsigned int
9636 get_r_type(const Reltype* reloc)
9637 { return elfcpp::elf_r_type<size>(reloc->get_r_info()); }
9639 // Return the strategy to use for a local symbol which is not a
9640 // section symbol, given the relocation type.
9641 inline Relocatable_relocs::Reloc_strategy
9642 local_non_section_strategy(unsigned int r_type, Relobj*, unsigned int r_sym)
9644 if (r_type == 0 && r_sym == 0)
9645 return Relocatable_relocs::RELOC_DISCARD;
9646 return Relocatable_relocs::RELOC_COPY;
9649 // Return the strategy to use for a local symbol which is a section
9650 // symbol, given the relocation type.
9651 inline Relocatable_relocs::Reloc_strategy
9652 local_section_strategy(unsigned int, Relobj*)
9654 return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA;
9657 // Return the strategy to use for a global symbol, given the
9658 // relocation type, the object, and the symbol index.
9659 inline Relocatable_relocs::Reloc_strategy
9660 global_strategy(unsigned int r_type, Relobj*, unsigned int)
9662 if (r_type == elfcpp::R_PPC_PLTREL24)
9663 return Relocatable_relocs::RELOC_SPECIAL;
9664 return Relocatable_relocs::RELOC_COPY;
9668 // Scan the relocs during a relocatable link.
9670 template<int size, bool big_endian>
9672 Target_powerpc<size, big_endian>::scan_relocatable_relocs(
9673 Symbol_table* symtab,
9675 Sized_relobj_file<size, big_endian>* object,
9676 unsigned int data_shndx,
9677 unsigned int sh_type,
9678 const unsigned char* prelocs,
9680 Output_section* output_section,
9681 bool needs_special_offset_handling,
9682 size_t local_symbol_count,
9683 const unsigned char* plocal_symbols,
9684 Relocatable_relocs* rr)
9686 typedef Powerpc_scan_relocatable_reloc<size, big_endian> Scan_strategy;
9688 gold_assert(sh_type == elfcpp::SHT_RELA);
9690 gold::scan_relocatable_relocs<size, big_endian, Scan_strategy>(
9698 needs_special_offset_handling,
9704 // Scan the relocs for --emit-relocs.
9706 template<int size, bool big_endian>
9708 Target_powerpc<size, big_endian>::emit_relocs_scan(
9709 Symbol_table* symtab,
9711 Sized_relobj_file<size, big_endian>* object,
9712 unsigned int data_shndx,
9713 unsigned int sh_type,
9714 const unsigned char* prelocs,
9716 Output_section* output_section,
9717 bool needs_special_offset_handling,
9718 size_t local_symbol_count,
9719 const unsigned char* plocal_syms,
9720 Relocatable_relocs* rr)
9722 typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian>
9724 typedef gold::Default_emit_relocs_strategy<Classify_reloc>
9725 Emit_relocs_strategy;
9727 gold_assert(sh_type == elfcpp::SHT_RELA);
9729 gold::scan_relocatable_relocs<size, big_endian, Emit_relocs_strategy>(
9737 needs_special_offset_handling,
9743 // Emit relocations for a section.
9744 // This is a modified version of the function by the same name in
9745 // target-reloc.h. Using relocate_special_relocatable for
9746 // R_PPC_PLTREL24 would require duplication of the entire body of the
9747 // loop, so we may as well duplicate the whole thing.
9749 template<int size, bool big_endian>
9751 Target_powerpc<size, big_endian>::relocate_relocs(
9752 const Relocate_info<size, big_endian>* relinfo,
9753 unsigned int sh_type,
9754 const unsigned char* prelocs,
9756 Output_section* output_section,
9757 typename elfcpp::Elf_types<size>::Elf_Off offset_in_output_section,
9759 Address view_address,
9761 unsigned char* reloc_view,
9762 section_size_type reloc_view_size)
9764 gold_assert(sh_type == elfcpp::SHT_RELA);
9766 typedef typename elfcpp::Rela<size, big_endian> Reltype;
9767 typedef typename elfcpp::Rela_write<size, big_endian> Reltype_write;
9768 const int reloc_size = elfcpp::Elf_sizes<size>::rela_size;
9769 // Offset from start of insn to d-field reloc.
9770 const int d_offset = big_endian ? 2 : 0;
9772 Powerpc_relobj<size, big_endian>* const object
9773 = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object);
9774 const unsigned int local_count = object->local_symbol_count();
9775 unsigned int got2_shndx = object->got2_shndx();
9776 Address got2_addend = 0;
9777 if (got2_shndx != 0)
9779 got2_addend = object->get_output_section_offset(got2_shndx);
9780 gold_assert(got2_addend != invalid_address);
9783 const bool relocatable = parameters->options().relocatable();
9785 unsigned char* pwrite = reloc_view;
9786 bool zap_next = false;
9787 for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size)
9789 Relocatable_relocs::Reloc_strategy strategy = relinfo->rr->strategy(i);
9790 if (strategy == Relocatable_relocs::RELOC_DISCARD)
9793 Reltype reloc(prelocs);
9794 Reltype_write reloc_write(pwrite);
9796 Address offset = reloc.get_r_offset();
9797 typename elfcpp::Elf_types<size>::Elf_WXword r_info = reloc.get_r_info();
9798 unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info);
9799 unsigned int r_type = elfcpp::elf_r_type<size>(r_info);
9800 const unsigned int orig_r_sym = r_sym;
9801 typename elfcpp::Elf_types<size>::Elf_Swxword addend
9802 = reloc.get_r_addend();
9803 const Symbol* gsym = NULL;
9807 // We could arrange to discard these and other relocs for
9808 // tls optimised sequences in the strategy methods, but for
9809 // now do as BFD ld does.
9810 r_type = elfcpp::R_POWERPC_NONE;
9814 // Get the new symbol index.
9815 Output_section* os = NULL;
9816 if (r_sym < local_count)
9820 case Relocatable_relocs::RELOC_COPY:
9821 case Relocatable_relocs::RELOC_SPECIAL:
9824 r_sym = object->symtab_index(r_sym);
9825 gold_assert(r_sym != -1U);
9829 case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA:
9831 // We are adjusting a section symbol. We need to find
9832 // the symbol table index of the section symbol for
9833 // the output section corresponding to input section
9834 // in which this symbol is defined.
9835 gold_assert(r_sym < local_count);
9837 unsigned int shndx =
9838 object->local_symbol_input_shndx(r_sym, &is_ordinary);
9839 gold_assert(is_ordinary);
9840 os = object->output_section(shndx);
9841 gold_assert(os != NULL);
9842 gold_assert(os->needs_symtab_index());
9843 r_sym = os->symtab_index();
9853 gsym = object->global_symbol(r_sym);
9854 gold_assert(gsym != NULL);
9855 if (gsym->is_forwarder())
9856 gsym = relinfo->symtab->resolve_forwards(gsym);
9858 gold_assert(gsym->has_symtab_index());
9859 r_sym = gsym->symtab_index();
9862 // Get the new offset--the location in the output section where
9863 // this relocation should be applied.
9864 if (static_cast<Address>(offset_in_output_section) != invalid_address)
9865 offset += offset_in_output_section;
9868 section_offset_type sot_offset =
9869 convert_types<section_offset_type, Address>(offset);
9870 section_offset_type new_sot_offset =
9871 output_section->output_offset(object, relinfo->data_shndx,
9873 gold_assert(new_sot_offset != -1);
9874 offset = new_sot_offset;
9877 // In an object file, r_offset is an offset within the section.
9878 // In an executable or dynamic object, generated by
9879 // --emit-relocs, r_offset is an absolute address.
9882 offset += view_address;
9883 if (static_cast<Address>(offset_in_output_section) != invalid_address)
9884 offset -= offset_in_output_section;
9887 // Handle the reloc addend based on the strategy.
9888 if (strategy == Relocatable_relocs::RELOC_COPY)
9890 else if (strategy == Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA)
9892 const Symbol_value<size>* psymval = object->local_symbol(orig_r_sym);
9893 addend = psymval->value(object, addend);
9894 // In a relocatable link, the symbol value is relative to
9895 // the start of the output section. For a non-relocatable
9896 // link, we need to adjust the addend.
9899 gold_assert(os != NULL);
9900 addend -= os->address();
9903 else if (strategy == Relocatable_relocs::RELOC_SPECIAL)
9907 if (addend >= 32768)
9908 addend += got2_addend;
9910 else if (r_type == elfcpp::R_POWERPC_REL16_HA)
9912 r_type = elfcpp::R_POWERPC_ADDR16_HA;
9915 else if (r_type == elfcpp::R_POWERPC_REL16_LO)
9917 r_type = elfcpp::R_POWERPC_ADDR16_LO;
9918 addend -= d_offset + 4;
9926 if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
9927 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO
9928 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI
9929 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA)
9931 // First instruction of a global dynamic sequence,
9933 const bool final = gsym == NULL || gsym->final_value_is_known();
9934 switch (this->optimize_tls_gd(final))
9936 case tls::TLSOPT_TO_IE:
9937 r_type += (elfcpp::R_POWERPC_GOT_TPREL16
9938 - elfcpp::R_POWERPC_GOT_TLSGD16);
9940 case tls::TLSOPT_TO_LE:
9941 if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
9942 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO)
9943 r_type = elfcpp::R_POWERPC_TPREL16_HA;
9946 r_type = elfcpp::R_POWERPC_NONE;
9954 else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16
9955 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO
9956 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI
9957 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA)
9959 // First instruction of a local dynamic sequence,
9961 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE)
9963 if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16
9964 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO)
9966 r_type = elfcpp::R_POWERPC_TPREL16_HA;
9967 const Output_section* os = relinfo->layout->tls_segment()
9969 gold_assert(os != NULL);
9970 gold_assert(os->needs_symtab_index());
9971 r_sym = os->symtab_index();
9972 addend = dtp_offset;
9976 r_type = elfcpp::R_POWERPC_NONE;
9981 else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16
9982 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO
9983 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI
9984 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA)
9986 // First instruction of initial exec sequence.
9987 const bool final = gsym == NULL || gsym->final_value_is_known();
9988 if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE)
9990 if (r_type == elfcpp::R_POWERPC_GOT_TPREL16
9991 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO)
9992 r_type = elfcpp::R_POWERPC_TPREL16_HA;
9995 r_type = elfcpp::R_POWERPC_NONE;
10000 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD)
10001 || (size == 32 && r_type == elfcpp::R_PPC_TLSGD))
10003 // Second instruction of a global dynamic sequence,
10004 // the __tls_get_addr call
10005 const bool final = gsym == NULL || gsym->final_value_is_known();
10006 switch (this->optimize_tls_gd(final))
10008 case tls::TLSOPT_TO_IE:
10009 r_type = elfcpp::R_POWERPC_NONE;
10012 case tls::TLSOPT_TO_LE:
10013 r_type = elfcpp::R_POWERPC_TPREL16_LO;
10014 offset += d_offset;
10021 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD)
10022 || (size == 32 && r_type == elfcpp::R_PPC_TLSLD))
10024 // Second instruction of a local dynamic sequence,
10025 // the __tls_get_addr call
10026 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE)
10028 const Output_section* os = relinfo->layout->tls_segment()
10030 gold_assert(os != NULL);
10031 gold_assert(os->needs_symtab_index());
10032 r_sym = os->symtab_index();
10033 addend = dtp_offset;
10034 r_type = elfcpp::R_POWERPC_TPREL16_LO;
10035 offset += d_offset;
10039 else if (r_type == elfcpp::R_POWERPC_TLS)
10041 // Second instruction of an initial exec sequence
10042 const bool final = gsym == NULL || gsym->final_value_is_known();
10043 if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE)
10045 r_type = elfcpp::R_POWERPC_TPREL16_LO;
10046 offset += d_offset;
10051 reloc_write.put_r_offset(offset);
10052 reloc_write.put_r_info(elfcpp::elf_r_info<size>(r_sym, r_type));
10053 reloc_write.put_r_addend(addend);
10055 pwrite += reloc_size;
10058 gold_assert(static_cast<section_size_type>(pwrite - reloc_view)
10059 == reloc_view_size);
10062 // Return the value to use for a dynamic symbol which requires special
10063 // treatment. This is how we support equality comparisons of function
10064 // pointers across shared library boundaries, as described in the
10065 // processor specific ABI supplement.
10067 template<int size, bool big_endian>
10069 Target_powerpc<size, big_endian>::do_dynsym_value(const Symbol* gsym) const
10073 gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset());
10074 for (typename Stub_tables::const_iterator p = this->stub_tables_.begin();
10075 p != this->stub_tables_.end();
10078 const typename Stub_table<size, big_endian>::Plt_stub_ent* ent
10079 = (*p)->find_plt_call_entry(gsym);
10081 return (*p)->stub_address() + ent->off_;
10084 else if (this->abiversion() >= 2)
10086 Address off = this->glink_section()->find_global_entry(gsym);
10087 if (off != invalid_address)
10088 return this->glink_section()->global_entry_address() + off;
10090 gold_unreachable();
10093 // Return the PLT address to use for a local symbol.
10094 template<int size, bool big_endian>
10096 Target_powerpc<size, big_endian>::do_plt_address_for_local(
10097 const Relobj* object,
10098 unsigned int symndx) const
10102 const Sized_relobj<size, big_endian>* relobj
10103 = static_cast<const Sized_relobj<size, big_endian>*>(object);
10104 for (typename Stub_tables::const_iterator p = this->stub_tables_.begin();
10105 p != this->stub_tables_.end();
10108 const typename Stub_table<size, big_endian>::Plt_stub_ent* ent
10109 = (*p)->find_plt_call_entry(relobj->sized_relobj(), symndx);
10111 return (*p)->stub_address() + ent->off_;
10114 gold_unreachable();
10117 // Return the PLT address to use for a global symbol.
10118 template<int size, bool big_endian>
10120 Target_powerpc<size, big_endian>::do_plt_address_for_global(
10121 const Symbol* gsym) const
10125 for (typename Stub_tables::const_iterator p = this->stub_tables_.begin();
10126 p != this->stub_tables_.end();
10129 const typename Stub_table<size, big_endian>::Plt_stub_ent* ent
10130 = (*p)->find_plt_call_entry(gsym);
10132 return (*p)->stub_address() + ent->off_;
10135 else if (this->abiversion() >= 2)
10137 Address off = this->glink_section()->find_global_entry(gsym);
10138 if (off != invalid_address)
10139 return this->glink_section()->global_entry_address() + off;
10141 gold_unreachable();
10144 // Return the offset to use for the GOT_INDX'th got entry which is
10145 // for a local tls symbol specified by OBJECT, SYMNDX.
10146 template<int size, bool big_endian>
10148 Target_powerpc<size, big_endian>::do_tls_offset_for_local(
10149 const Relobj* object,
10150 unsigned int symndx,
10151 unsigned int got_indx) const
10153 const Powerpc_relobj<size, big_endian>* ppc_object
10154 = static_cast<const Powerpc_relobj<size, big_endian>*>(object);
10155 if (ppc_object->local_symbol(symndx)->is_tls_symbol())
10157 for (Got_type got_type = GOT_TYPE_TLSGD;
10158 got_type <= GOT_TYPE_TPREL;
10159 got_type = Got_type(got_type + 1))
10160 if (ppc_object->local_has_got_offset(symndx, got_type))
10162 unsigned int off = ppc_object->local_got_offset(symndx, got_type);
10163 if (got_type == GOT_TYPE_TLSGD)
10165 if (off == got_indx * (size / 8))
10167 if (got_type == GOT_TYPE_TPREL)
10170 return -dtp_offset;
10174 gold_unreachable();
10177 // Return the offset to use for the GOT_INDX'th got entry which is
10178 // for global tls symbol GSYM.
10179 template<int size, bool big_endian>
10181 Target_powerpc<size, big_endian>::do_tls_offset_for_global(
10183 unsigned int got_indx) const
10185 if (gsym->type() == elfcpp::STT_TLS)
10187 for (Got_type got_type = GOT_TYPE_TLSGD;
10188 got_type <= GOT_TYPE_TPREL;
10189 got_type = Got_type(got_type + 1))
10190 if (gsym->has_got_offset(got_type))
10192 unsigned int off = gsym->got_offset(got_type);
10193 if (got_type == GOT_TYPE_TLSGD)
10195 if (off == got_indx * (size / 8))
10197 if (got_type == GOT_TYPE_TPREL)
10200 return -dtp_offset;
10204 gold_unreachable();
10207 // The selector for powerpc object files.
10209 template<int size, bool big_endian>
10210 class Target_selector_powerpc : public Target_selector
10213 Target_selector_powerpc()
10214 : Target_selector(size == 64 ? elfcpp::EM_PPC64 : elfcpp::EM_PPC,
10217 ? (big_endian ? "elf64-powerpc" : "elf64-powerpcle")
10218 : (big_endian ? "elf32-powerpc" : "elf32-powerpcle")),
10220 ? (big_endian ? "elf64ppc" : "elf64lppc")
10221 : (big_endian ? "elf32ppc" : "elf32lppc")))
10225 do_instantiate_target()
10226 { return new Target_powerpc<size, big_endian>(); }
10229 Target_selector_powerpc<32, true> target_selector_ppc32;
10230 Target_selector_powerpc<32, false> target_selector_ppc32le;
10231 Target_selector_powerpc<64, true> target_selector_ppc64;
10232 Target_selector_powerpc<64, false> target_selector_ppc64le;
10234 // Instantiate these constants for -O0
10235 template<int size, bool big_endian>
10236 const typename Output_data_glink<size, big_endian>::Address
10237 Output_data_glink<size, big_endian>::invalid_address;
10238 template<int size, bool big_endian>
10239 const typename Stub_table<size, big_endian>::Address
10240 Stub_table<size, big_endian>::invalid_address;
10241 template<int size, bool big_endian>
10242 const typename Target_powerpc<size, big_endian>::Address
10243 Target_powerpc<size, big_endian>::invalid_address;
10245 } // End anonymous namespace.