1 // powerpc.cc -- powerpc target support for gold.
3 // Copyright 2008, 2009, 2010, 2011, 2012 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.
28 #include "parameters.h"
35 #include "copy-relocs.h"
37 #include "target-reloc.h"
38 #include "target-select.h"
48 template<int size, bool big_endian>
49 class Output_data_plt_powerpc;
51 template<int size, bool big_endian>
52 class Output_data_brlt_powerpc;
54 template<int size, bool big_endian>
55 class Output_data_got_powerpc;
57 template<int size, bool big_endian>
58 class Output_data_glink;
60 template<int size, bool big_endian>
63 template<int size, bool big_endian>
64 class Powerpc_relobj : public Sized_relobj_file<size, big_endian>
67 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
68 typedef Unordered_set<Section_id, Section_id_hash> Section_refs;
69 typedef Unordered_map<Address, Section_refs> Access_from;
71 Powerpc_relobj(const std::string& name, Input_file* input_file, off_t offset,
72 const typename elfcpp::Ehdr<size, big_endian>& ehdr)
73 : Sized_relobj_file<size, big_endian>(name, input_file, offset, ehdr),
74 special_(0), has_small_toc_reloc_(false), opd_valid_(false),
75 opd_ent_(), access_from_map_(), has14_(), stub_table_()
81 // The .got2 section shndx.
86 return this->special_;
91 // The .opd section shndx.
98 return this->special_;
101 // Init OPD entry arrays.
103 init_opd(size_t opd_size)
105 size_t count = this->opd_ent_ndx(opd_size);
106 this->opd_ent_.resize(count);
109 // Return section and offset of function entry for .opd + R_OFF.
111 get_opd_ent(Address r_off, Address* value = NULL) const
113 size_t ndx = this->opd_ent_ndx(r_off);
114 gold_assert(ndx < this->opd_ent_.size());
115 gold_assert(this->opd_ent_[ndx].shndx != 0);
117 *value = this->opd_ent_[ndx].off;
118 return this->opd_ent_[ndx].shndx;
121 // Set section and offset of function entry for .opd + R_OFF.
123 set_opd_ent(Address r_off, unsigned int shndx, Address value)
125 size_t ndx = this->opd_ent_ndx(r_off);
126 gold_assert(ndx < this->opd_ent_.size());
127 this->opd_ent_[ndx].shndx = shndx;
128 this->opd_ent_[ndx].off = value;
131 // Return discard flag for .opd + R_OFF.
133 get_opd_discard(Address r_off) const
135 size_t ndx = this->opd_ent_ndx(r_off);
136 gold_assert(ndx < this->opd_ent_.size());
137 return this->opd_ent_[ndx].discard;
140 // Set discard flag for .opd + R_OFF.
142 set_opd_discard(Address r_off)
144 size_t ndx = this->opd_ent_ndx(r_off);
145 gold_assert(ndx < this->opd_ent_.size());
146 this->opd_ent_[ndx].discard = true;
151 { return &this->access_from_map_; }
153 // Add a reference from SRC_OBJ, SRC_INDX to this object's .opd
154 // section at DST_OFF.
156 add_reference(Object* src_obj,
157 unsigned int src_indx,
158 typename elfcpp::Elf_types<size>::Elf_Addr dst_off)
160 Section_id src_id(src_obj, src_indx);
161 this->access_from_map_[dst_off].insert(src_id);
164 // Add a reference to the code section specified by the .opd entry
167 add_gc_mark(typename elfcpp::Elf_types<size>::Elf_Addr dst_off)
169 size_t ndx = this->opd_ent_ndx(dst_off);
170 if (ndx >= this->opd_ent_.size())
171 this->opd_ent_.resize(ndx + 1);
172 this->opd_ent_[ndx].gc_mark = true;
176 process_gc_mark(Symbol_table* symtab)
178 for (size_t i = 0; i < this->opd_ent_.size(); i++)
179 if (this->opd_ent_[i].gc_mark)
181 unsigned int shndx = this->opd_ent_[i].shndx;
182 symtab->gc()->worklist().push(Section_id(this, shndx));
188 { return this->opd_valid_; }
192 { this->opd_valid_ = true; }
194 // Examine .rela.opd to build info about function entry points.
196 scan_opd_relocs(size_t reloc_count,
197 const unsigned char* prelocs,
198 const unsigned char* plocal_syms);
200 // Perform the Sized_relobj_file method, then set up opd info from
203 do_read_relocs(Read_relocs_data*);
206 do_find_special_sections(Read_symbols_data* sd);
208 // Adjust this local symbol value. Return false if the symbol
209 // should be discarded from the output file.
211 do_adjust_local_symbol(Symbol_value<size>* lv) const
213 if (size == 64 && this->opd_shndx() != 0)
216 if (lv->input_shndx(&is_ordinary) != this->opd_shndx())
218 if (this->get_opd_discard(lv->input_value()))
224 // Return offset in output GOT section that this object will use
225 // as a TOC pointer. Won't be just a constant with multi-toc support.
227 toc_base_offset() const
231 set_has_small_toc_reloc()
232 { has_small_toc_reloc_ = true; }
235 has_small_toc_reloc() const
236 { return has_small_toc_reloc_; }
239 set_has_14bit_branch(unsigned int shndx)
241 if (shndx >= this->has14_.size())
242 this->has14_.resize(shndx + 1);
243 this->has14_[shndx] = true;
247 has_14bit_branch(unsigned int shndx) const
248 { return shndx < this->has14_.size() && this->has14_[shndx]; }
251 set_stub_table(unsigned int shndx, Stub_table<size, big_endian>* stub_table)
253 if (shndx >= this->stub_table_.size())
254 this->stub_table_.resize(shndx + 1);
255 this->stub_table_[shndx] = stub_table;
258 Stub_table<size, big_endian>*
259 stub_table(unsigned int shndx)
261 if (shndx < this->stub_table_.size())
262 return this->stub_table_[shndx];
275 // Return index into opd_ent_ array for .opd entry at OFF.
276 // .opd entries are 24 bytes long, but they can be spaced 16 bytes
277 // apart when the language doesn't use the last 8-byte word, the
278 // environment pointer. Thus dividing the entry section offset by
279 // 16 will give an index into opd_ent_ that works for either layout
280 // of .opd. (It leaves some elements of the vector unused when .opd
281 // entries are spaced 24 bytes apart, but we don't know the spacing
282 // until relocations are processed, and in any case it is possible
283 // for an object to have some entries spaced 16 bytes apart and
284 // others 24 bytes apart.)
286 opd_ent_ndx(size_t off) const
289 // For 32-bit the .got2 section shdnx, for 64-bit the .opd section shndx.
290 unsigned int special_;
292 // For 64-bit, whether this object uses small model relocs to access
294 bool has_small_toc_reloc_;
296 // Set at the start of gc_process_relocs, when we know opd_ent_
297 // vector is valid. The flag could be made atomic and set in
298 // do_read_relocs with memory_order_release and then tested with
299 // memory_order_acquire, potentially resulting in fewer entries in
303 // The first 8-byte word of an OPD entry gives the address of the
304 // entry point of the function. Relocatable object files have a
305 // relocation on this word. The following vector records the
306 // section and offset specified by these relocations.
307 std::vector<Opd_ent> opd_ent_;
309 // References made to this object's .opd section when running
310 // gc_process_relocs for another object, before the opd_ent_ vector
311 // is valid for this object.
312 Access_from access_from_map_;
314 // Whether input section has a 14-bit branch reloc.
315 std::vector<bool> has14_;
317 // The stub table to use for a given input section.
318 std::vector<Stub_table<size, big_endian>*> stub_table_;
321 template<int size, bool big_endian>
322 class Target_powerpc : public Sized_target<size, big_endian>
326 Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Reloc_section;
327 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
328 typedef typename elfcpp::Elf_types<size>::Elf_Swxword Signed_address;
329 static const Address invalid_address = static_cast<Address>(0) - 1;
330 // Offset of tp and dtp pointers from start of TLS block.
331 static const Address tp_offset = 0x7000;
332 static const Address dtp_offset = 0x8000;
335 : Sized_target<size, big_endian>(&powerpc_info),
336 got_(NULL), plt_(NULL), iplt_(NULL), brlt_section_(NULL),
337 glink_(NULL), rela_dyn_(NULL), copy_relocs_(elfcpp::R_POWERPC_COPY),
338 dynbss_(NULL), tlsld_got_offset_(-1U),
339 stub_tables_(), branch_lookup_table_(), branch_info_(),
340 plt_thread_safe_(false)
344 // Process the relocations to determine unreferenced sections for
345 // garbage collection.
347 gc_process_relocs(Symbol_table* symtab,
349 Sized_relobj_file<size, big_endian>* object,
350 unsigned int data_shndx,
351 unsigned int sh_type,
352 const unsigned char* prelocs,
354 Output_section* output_section,
355 bool needs_special_offset_handling,
356 size_t local_symbol_count,
357 const unsigned char* plocal_symbols);
359 // Scan the relocations to look for symbol adjustments.
361 scan_relocs(Symbol_table* symtab,
363 Sized_relobj_file<size, big_endian>* object,
364 unsigned int data_shndx,
365 unsigned int sh_type,
366 const unsigned char* prelocs,
368 Output_section* output_section,
369 bool needs_special_offset_handling,
370 size_t local_symbol_count,
371 const unsigned char* plocal_symbols);
373 // Map input .toc section to output .got section.
375 do_output_section_name(const Relobj*, const char* name, size_t* plen) const
377 if (size == 64 && strcmp(name, ".toc") == 0)
385 // Provide linker defined save/restore functions.
387 define_save_restore_funcs(Layout*, Symbol_table*);
389 // No stubs unless a final link.
392 { return !parameters->options().relocatable(); }
395 do_relax(int, const Input_objects*, Symbol_table*, Layout*, const Task*);
397 // Stash info about branches, for stub generation.
399 push_branch(Powerpc_relobj<size, big_endian>* ppc_object,
400 unsigned int data_shndx, Address r_offset,
401 unsigned int r_type, unsigned int r_sym, Address addend)
403 Branch_info info(ppc_object, data_shndx, r_offset, r_type, r_sym, addend);
404 this->branch_info_.push_back(info);
405 if (r_type == elfcpp::R_POWERPC_REL14
406 || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN
407 || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN)
408 ppc_object->set_has_14bit_branch(data_shndx);
411 Stub_table<size, big_endian>*
415 do_define_standard_symbols(Symbol_table*, Layout*);
417 // Finalize the sections.
419 do_finalize_sections(Layout*, const Input_objects*, Symbol_table*);
421 // Return the value to use for a dynamic which requires special
424 do_dynsym_value(const Symbol*) const;
426 // Return the PLT address to use for a local symbol.
428 do_plt_address_for_local(const Relobj*, unsigned int) const;
430 // Return the PLT address to use for a global symbol.
432 do_plt_address_for_global(const Symbol*) const;
434 // Return the offset to use for the GOT_INDX'th got entry which is
435 // for a local tls symbol specified by OBJECT, SYMNDX.
437 do_tls_offset_for_local(const Relobj* object,
439 unsigned int got_indx) const;
441 // Return the offset to use for the GOT_INDX'th got entry which is
442 // for global tls symbol GSYM.
444 do_tls_offset_for_global(Symbol* gsym, unsigned int got_indx) const;
446 // Relocate a section.
448 relocate_section(const Relocate_info<size, big_endian>*,
449 unsigned int sh_type,
450 const unsigned char* prelocs,
452 Output_section* output_section,
453 bool needs_special_offset_handling,
455 Address view_address,
456 section_size_type view_size,
457 const Reloc_symbol_changes*);
459 // Scan the relocs during a relocatable link.
461 scan_relocatable_relocs(Symbol_table* symtab,
463 Sized_relobj_file<size, big_endian>* object,
464 unsigned int data_shndx,
465 unsigned int sh_type,
466 const unsigned char* prelocs,
468 Output_section* output_section,
469 bool needs_special_offset_handling,
470 size_t local_symbol_count,
471 const unsigned char* plocal_symbols,
472 Relocatable_relocs*);
474 // Emit relocations for a section.
476 relocate_relocs(const Relocate_info<size, big_endian>*,
477 unsigned int sh_type,
478 const unsigned char* prelocs,
480 Output_section* output_section,
481 typename elfcpp::Elf_types<size>::Elf_Off
482 offset_in_output_section,
483 const Relocatable_relocs*,
485 Address view_address,
487 unsigned char* reloc_view,
488 section_size_type reloc_view_size);
490 // Return whether SYM is defined by the ABI.
492 do_is_defined_by_abi(const Symbol* sym) const
494 return strcmp(sym->name(), "__tls_get_addr") == 0;
497 // Return the size of the GOT section.
501 gold_assert(this->got_ != NULL);
502 return this->got_->data_size();
505 // Get the PLT section.
506 const Output_data_plt_powerpc<size, big_endian>*
509 gold_assert(this->plt_ != NULL);
513 // Get the IPLT section.
514 const Output_data_plt_powerpc<size, big_endian>*
517 gold_assert(this->iplt_ != NULL);
521 // Get the .glink section.
522 const Output_data_glink<size, big_endian>*
523 glink_section() const
525 gold_assert(this->glink_ != NULL);
529 // Get the GOT section.
530 const Output_data_got_powerpc<size, big_endian>*
533 gold_assert(this->got_ != NULL);
537 // Get the GOT section, creating it if necessary.
538 Output_data_got_powerpc<size, big_endian>*
539 got_section(Symbol_table*, Layout*);
542 do_make_elf_object(const std::string&, Input_file*, off_t,
543 const elfcpp::Ehdr<size, big_endian>&);
545 // Return the number of entries in the GOT.
547 got_entry_count() const
549 if (this->got_ == NULL)
551 return this->got_size() / (size / 8);
554 // Return the number of entries in the PLT.
556 plt_entry_count() const;
558 // Return the offset of the first non-reserved PLT entry.
560 first_plt_entry_offset() const;
562 // Return the size of each PLT entry.
564 plt_entry_size() const;
566 // Add any special sections for this symbol to the gc work list.
567 // For powerpc64, this adds the code section of a function
570 do_gc_mark_symbol(Symbol_table* symtab, Symbol* sym) const;
572 // Handle target specific gc actions when adding a gc reference from
573 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
574 // and DST_OFF. For powerpc64, this adds a referenc to the code
575 // section of a function descriptor.
577 do_gc_add_reference(Symbol_table* symtab,
579 unsigned int src_shndx,
581 unsigned int dst_shndx,
582 Address dst_off) const;
584 typedef std::vector<Stub_table<size, big_endian>*> Stub_tables;
587 { return this->stub_tables_; }
589 const Output_data_brlt_powerpc<size, big_endian>*
591 { return this->brlt_section_; }
594 add_branch_lookup_table(Address to)
596 unsigned int off = this->branch_lookup_table_.size() * (size / 8);
597 this->branch_lookup_table_.insert(std::make_pair(to, off));
601 find_branch_lookup_table(Address to)
603 typename Branch_lookup_table::const_iterator p
604 = this->branch_lookup_table_.find(to);
605 return p == this->branch_lookup_table_.end() ? invalid_address : p->second;
609 write_branch_lookup_table(unsigned char *oview)
611 for (typename Branch_lookup_table::const_iterator p
612 = this->branch_lookup_table_.begin();
613 p != this->branch_lookup_table_.end();
616 elfcpp::Swap<32, big_endian>::writeval(oview + p->second, p->first);
621 plt_thread_safe() const
622 { return this->plt_thread_safe_; }
626 // The class which scans relocations.
630 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
633 : issued_non_pic_error_(false)
637 get_reference_flags(unsigned int r_type);
640 local(Symbol_table* symtab, Layout* layout, Target_powerpc* target,
641 Sized_relobj_file<size, big_endian>* object,
642 unsigned int data_shndx,
643 Output_section* output_section,
644 const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type,
645 const elfcpp::Sym<size, big_endian>& lsym,
649 global(Symbol_table* symtab, Layout* layout, Target_powerpc* target,
650 Sized_relobj_file<size, big_endian>* object,
651 unsigned int data_shndx,
652 Output_section* output_section,
653 const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type,
657 local_reloc_may_be_function_pointer(Symbol_table* , Layout* ,
659 Sized_relobj_file<size, big_endian>* ,
662 const elfcpp::Rela<size, big_endian>& ,
664 const elfcpp::Sym<size, big_endian>&)
668 global_reloc_may_be_function_pointer(Symbol_table* , Layout* ,
670 Sized_relobj_file<size, big_endian>* ,
673 const elfcpp::Rela<size,
675 unsigned int , Symbol*)
680 unsupported_reloc_local(Sized_relobj_file<size, big_endian>*,
681 unsigned int r_type);
684 unsupported_reloc_global(Sized_relobj_file<size, big_endian>*,
685 unsigned int r_type, Symbol*);
688 generate_tls_call(Symbol_table* symtab, Layout* layout,
689 Target_powerpc* target);
692 check_non_pic(Relobj*, unsigned int r_type);
695 reloc_needs_plt_for_ifunc(Sized_relobj_file<size, big_endian>* object,
696 unsigned int r_type);
698 // Whether we have issued an error about a non-PIC compilation.
699 bool issued_non_pic_error_;
703 symval_for_branch(Address value, const Sized_symbol<size>* gsym,
704 Powerpc_relobj<size, big_endian>* object,
705 unsigned int *dest_shndx);
707 // The class which implements relocation.
711 // Use 'at' branch hints when true, 'y' when false.
712 // FIXME maybe: set this with an option.
713 static const bool is_isa_v2 = true;
717 CALL_NOT_EXPECTED = 0,
723 : call_tls_get_addr_(CALL_NOT_EXPECTED)
728 if (this->call_tls_get_addr_ != CALL_NOT_EXPECTED)
730 // FIXME: This needs to specify the location somehow.
731 gold_error(_("missing expected __tls_get_addr call"));
735 // Do a relocation. Return false if the caller should not issue
736 // any warnings about this relocation.
738 relocate(const Relocate_info<size, big_endian>*, Target_powerpc*,
739 Output_section*, size_t relnum,
740 const elfcpp::Rela<size, big_endian>&,
741 unsigned int r_type, const Sized_symbol<size>*,
742 const Symbol_value<size>*,
744 typename elfcpp::Elf_types<size>::Elf_Addr,
747 // This is set if we should skip the next reloc, which should be a
748 // call to __tls_get_addr.
749 enum skip_tls call_tls_get_addr_;
752 class Relocate_comdat_behavior
755 // Decide what the linker should do for relocations that refer to
756 // discarded comdat sections.
757 inline Comdat_behavior
758 get(const char* name)
760 gold::Default_comdat_behavior default_behavior;
761 Comdat_behavior ret = default_behavior.get(name);
762 if (ret == CB_WARNING)
765 && (strcmp(name, ".fixup") == 0
766 || strcmp(name, ".got2") == 0))
769 && (strcmp(name, ".opd") == 0
770 || strcmp(name, ".toc") == 0
771 || strcmp(name, ".toc1") == 0))
778 // A class which returns the size required for a relocation type,
779 // used while scanning relocs during a relocatable link.
780 class Relocatable_size_for_reloc
784 get_size_for_reloc(unsigned int, Relobj*)
791 // Optimize the TLS relocation type based on what we know about the
792 // symbol. IS_FINAL is true if the final address of this symbol is
793 // known at link time.
795 tls::Tls_optimization
796 optimize_tls_gd(bool is_final)
798 // If we are generating a shared library, then we can't do anything
800 if (parameters->options().shared())
801 return tls::TLSOPT_NONE;
804 return tls::TLSOPT_TO_IE;
805 return tls::TLSOPT_TO_LE;
808 tls::Tls_optimization
811 if (parameters->options().shared())
812 return tls::TLSOPT_NONE;
814 return tls::TLSOPT_TO_LE;
817 tls::Tls_optimization
818 optimize_tls_ie(bool is_final)
820 if (!is_final || parameters->options().shared())
821 return tls::TLSOPT_NONE;
823 return tls::TLSOPT_TO_LE;
828 make_glink_section(Layout*);
830 // Create the PLT section.
832 make_plt_section(Symbol_table*, Layout*);
835 make_iplt_section(Symbol_table*, Layout*);
838 make_brlt_section(Layout*);
840 // Create a PLT entry for a global symbol.
842 make_plt_entry(Symbol_table*, Layout*, Symbol*);
844 // Create a PLT entry for a local IFUNC symbol.
846 make_local_ifunc_plt_entry(Symbol_table*, Layout*,
847 Sized_relobj_file<size, big_endian>*,
851 // Create a GOT entry for local dynamic __tls_get_addr.
853 tlsld_got_offset(Symbol_table* symtab, Layout* layout,
854 Sized_relobj_file<size, big_endian>* object);
857 tlsld_got_offset() const
859 return this->tlsld_got_offset_;
862 // Get the dynamic reloc section, creating it if necessary.
864 rela_dyn_section(Layout*);
866 // Copy a relocation against a global symbol.
868 copy_reloc(Symbol_table* symtab, Layout* layout,
869 Sized_relobj_file<size, big_endian>* object,
870 unsigned int shndx, Output_section* output_section,
871 Symbol* sym, const elfcpp::Rela<size, big_endian>& reloc)
873 this->copy_relocs_.copy_reloc(symtab, layout,
874 symtab->get_sized_symbol<size>(sym),
875 object, shndx, output_section,
876 reloc, this->rela_dyn_section(layout));
879 // Look over all the input sections, deciding where to place stub.
881 group_sections(Layout*, const Task*);
883 // Sort output sections by address.
887 operator()(const Output_section* sec1, const Output_section* sec2)
888 { return sec1->address() < sec2->address(); }
894 Branch_info(Powerpc_relobj<size, big_endian>* ppc_object,
895 unsigned int data_shndx,
900 : object_(ppc_object), shndx_(data_shndx), offset_(r_offset),
901 r_type_(r_type), r_sym_(r_sym), addend_(addend)
907 // If this branch needs a plt call stub, or a long branch stub, make one.
909 make_stub(Stub_table<size, big_endian>*,
910 Stub_table<size, big_endian>*,
911 Symbol_table*) const;
914 // The branch location..
915 Powerpc_relobj<size, big_endian>* object_;
918 // ..and the branch type and destination.
919 unsigned int r_type_;
924 // Information about this specific target which we pass to the
925 // general Target structure.
926 static Target::Target_info powerpc_info;
928 // The types of GOT entries needed for this platform.
929 // These values are exposed to the ABI in an incremental link.
930 // Do not renumber existing values without changing the version
931 // number of the .gnu_incremental_inputs section.
935 GOT_TYPE_TLSGD, // double entry for @got@tlsgd
936 GOT_TYPE_DTPREL, // entry for @got@dtprel
937 GOT_TYPE_TPREL // entry for @got@tprel
941 Output_data_got_powerpc<size, big_endian>* got_;
943 Output_data_plt_powerpc<size, big_endian>* plt_;
945 Output_data_plt_powerpc<size, big_endian>* iplt_;
946 // Section holding long branch destinations.
947 Output_data_brlt_powerpc<size, big_endian>* brlt_section_;
948 // The .glink section.
949 Output_data_glink<size, big_endian>* glink_;
950 // The dynamic reloc section.
951 Reloc_section* rela_dyn_;
952 // Relocs saved to avoid a COPY reloc.
953 Copy_relocs<elfcpp::SHT_RELA, size, big_endian> copy_relocs_;
954 // Space for variables copied with a COPY reloc.
955 Output_data_space* dynbss_;
956 // Offset of the GOT entry for local dynamic __tls_get_addr calls.
957 unsigned int tlsld_got_offset_;
959 Stub_tables stub_tables_;
960 typedef Unordered_map<Address, unsigned int> Branch_lookup_table;
961 Branch_lookup_table branch_lookup_table_;
963 typedef std::vector<Branch_info> Branches;
964 Branches branch_info_;
966 bool plt_thread_safe_;
970 Target::Target_info Target_powerpc<32, true>::powerpc_info =
973 true, // is_big_endian
974 elfcpp::EM_PPC, // machine_code
975 false, // has_make_symbol
976 false, // has_resolve
977 false, // has_code_fill
978 true, // is_default_stack_executable
979 false, // can_icf_inline_merge_sections
981 "/usr/lib/ld.so.1", // dynamic_linker
982 0x10000000, // default_text_segment_address
983 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
984 4 * 1024, // common_pagesize (overridable by -z common-page-size)
985 false, // isolate_execinstr
987 elfcpp::SHN_UNDEF, // small_common_shndx
988 elfcpp::SHN_UNDEF, // large_common_shndx
989 0, // small_common_section_flags
990 0, // large_common_section_flags
991 NULL, // attributes_section
992 NULL // attributes_vendor
996 Target::Target_info Target_powerpc<32, false>::powerpc_info =
999 false, // is_big_endian
1000 elfcpp::EM_PPC, // machine_code
1001 false, // has_make_symbol
1002 false, // has_resolve
1003 false, // has_code_fill
1004 true, // is_default_stack_executable
1005 false, // can_icf_inline_merge_sections
1007 "/usr/lib/ld.so.1", // dynamic_linker
1008 0x10000000, // default_text_segment_address
1009 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1010 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1011 false, // isolate_execinstr
1013 elfcpp::SHN_UNDEF, // small_common_shndx
1014 elfcpp::SHN_UNDEF, // large_common_shndx
1015 0, // small_common_section_flags
1016 0, // large_common_section_flags
1017 NULL, // attributes_section
1018 NULL // attributes_vendor
1022 Target::Target_info Target_powerpc<64, true>::powerpc_info =
1025 true, // is_big_endian
1026 elfcpp::EM_PPC64, // machine_code
1027 false, // has_make_symbol
1028 false, // has_resolve
1029 false, // has_code_fill
1030 true, // is_default_stack_executable
1031 false, // can_icf_inline_merge_sections
1033 "/usr/lib/ld.so.1", // dynamic_linker
1034 0x10000000, // default_text_segment_address
1035 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1036 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1037 false, // isolate_execinstr
1039 elfcpp::SHN_UNDEF, // small_common_shndx
1040 elfcpp::SHN_UNDEF, // large_common_shndx
1041 0, // small_common_section_flags
1042 0, // large_common_section_flags
1043 NULL, // attributes_section
1044 NULL // attributes_vendor
1048 Target::Target_info Target_powerpc<64, false>::powerpc_info =
1051 false, // is_big_endian
1052 elfcpp::EM_PPC64, // machine_code
1053 false, // has_make_symbol
1054 false, // has_resolve
1055 false, // has_code_fill
1056 true, // is_default_stack_executable
1057 false, // can_icf_inline_merge_sections
1059 "/usr/lib/ld.so.1", // dynamic_linker
1060 0x10000000, // default_text_segment_address
1061 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1062 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1063 false, // isolate_execinstr
1065 elfcpp::SHN_UNDEF, // small_common_shndx
1066 elfcpp::SHN_UNDEF, // large_common_shndx
1067 0, // small_common_section_flags
1068 0, // large_common_section_flags
1069 NULL, // attributes_section
1070 NULL // attributes_vendor
1074 is_branch_reloc(unsigned int r_type)
1076 return (r_type == elfcpp::R_POWERPC_REL24
1077 || r_type == elfcpp::R_PPC_PLTREL24
1078 || r_type == elfcpp::R_PPC_LOCAL24PC
1079 || r_type == elfcpp::R_POWERPC_REL14
1080 || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN
1081 || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN
1082 || r_type == elfcpp::R_POWERPC_ADDR24
1083 || r_type == elfcpp::R_POWERPC_ADDR14
1084 || r_type == elfcpp::R_POWERPC_ADDR14_BRTAKEN
1085 || r_type == elfcpp::R_POWERPC_ADDR14_BRNTAKEN);
1088 // If INSN is an opcode that may be used with an @tls operand, return
1089 // the transformed insn for TLS optimisation, otherwise return 0. If
1090 // REG is non-zero only match an insn with RB or RA equal to REG.
1092 at_tls_transform(uint32_t insn, unsigned int reg)
1094 if ((insn & (0x3f << 26)) != 31 << 26)
1098 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
1099 rtra = insn & ((1 << 26) - (1 << 16));
1100 else if (((insn >> 16) & 0x1f) == reg)
1101 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
1105 if ((insn & (0x3ff << 1)) == 266 << 1)
1108 else if ((insn & (0x1f << 1)) == 23 << 1
1109 && ((insn & (0x1f << 6)) < 14 << 6
1110 || ((insn & (0x1f << 6)) >= 16 << 6
1111 && (insn & (0x1f << 6)) < 24 << 6)))
1112 // load and store indexed -> dform
1113 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
1114 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
1115 // ldx, ldux, stdx, stdux -> ld, ldu, std, stdu
1116 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
1117 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
1119 insn = (58 << 26) | 2;
1126 // Modified version of symtab.h class Symbol member
1127 // Given a direct absolute or pc-relative static relocation against
1128 // the global symbol, this function returns whether a dynamic relocation
1133 needs_dynamic_reloc(const Symbol* gsym, int flags)
1135 // No dynamic relocations in a static link!
1136 if (parameters->doing_static_link())
1139 // A reference to an undefined symbol from an executable should be
1140 // statically resolved to 0, and does not need a dynamic relocation.
1141 // This matches gnu ld behavior.
1142 if (gsym->is_undefined() && !parameters->options().shared())
1145 // A reference to an absolute symbol does not need a dynamic relocation.
1146 if (gsym->is_absolute())
1149 // An absolute reference within a position-independent output file
1150 // will need a dynamic relocation.
1151 if ((flags & Symbol::ABSOLUTE_REF)
1152 && parameters->options().output_is_position_independent())
1155 // A function call that can branch to a local PLT entry does not need
1156 // a dynamic relocation.
1157 if ((flags & Symbol::FUNCTION_CALL) && gsym->has_plt_offset())
1160 // A reference to any PLT entry in a non-position-independent executable
1161 // does not need a dynamic relocation.
1162 // Except due to having function descriptors on powerpc64 we don't define
1163 // functions to their plt code in an executable, so this doesn't apply.
1165 && !parameters->options().output_is_position_independent()
1166 && gsym->has_plt_offset())
1169 // A reference to a symbol defined in a dynamic object or to a
1170 // symbol that is preemptible will need a dynamic relocation.
1171 if (gsym->is_from_dynobj()
1172 || gsym->is_undefined()
1173 || gsym->is_preemptible())
1176 // For all other cases, return FALSE.
1180 // Modified version of symtab.h class Symbol member
1181 // Whether we should use the PLT offset associated with a symbol for
1182 // a relocation. FLAGS is a set of Reference_flags.
1186 use_plt_offset(const Symbol* gsym, int flags)
1188 // If the symbol doesn't have a PLT offset, then naturally we
1189 // don't want to use it.
1190 if (!gsym->has_plt_offset())
1193 // For a STT_GNU_IFUNC symbol we always have to use the PLT entry.
1194 if (gsym->type() == elfcpp::STT_GNU_IFUNC)
1197 // If we are going to generate a dynamic relocation, then we will
1198 // wind up using that, so no need to use the PLT entry.
1199 if (needs_dynamic_reloc<size>(gsym, flags))
1202 // If the symbol is from a dynamic object, we need to use the PLT
1204 if (gsym->is_from_dynobj())
1207 // If we are generating a shared object, and this symbol is
1208 // undefined or preemptible, we need to use the PLT entry.
1209 if (parameters->options().shared()
1210 && (gsym->is_undefined() || gsym->is_preemptible()))
1213 // If this is a call to a weak undefined symbol, we need to use
1214 // the PLT entry; the symbol may be defined by a library loaded
1216 if ((flags & Symbol::FUNCTION_CALL) && gsym->is_weak_undefined())
1219 // Otherwise we can use the regular definition.
1223 template<int size, bool big_endian>
1224 class Powerpc_relocate_functions
1241 typedef Powerpc_relocate_functions<size, big_endian> This;
1242 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
1244 template<int valsize>
1246 has_overflow_signed(Address value)
1248 // limit = 1 << (valsize - 1) without shift count exceeding size of type
1249 Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1);
1250 limit <<= ((valsize - 1) >> 1);
1251 limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1));
1252 return value + limit > (limit << 1) - 1;
1255 template<int valsize>
1257 has_overflow_bitfield(Address value)
1259 Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1);
1260 limit <<= ((valsize - 1) >> 1);
1261 limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1));
1262 return value > (limit << 1) - 1 && value + limit > (limit << 1) - 1;
1265 template<int valsize>
1266 static inline Status
1267 overflowed(Address value, Overflow_check overflow)
1269 if (overflow == CHECK_SIGNED)
1271 if (has_overflow_signed<valsize>(value))
1272 return STATUS_OVERFLOW;
1274 else if (overflow == CHECK_BITFIELD)
1276 if (has_overflow_bitfield<valsize>(value))
1277 return STATUS_OVERFLOW;
1282 // Do a simple RELA relocation
1283 template<int valsize>
1284 static inline Status
1285 rela(unsigned char* view, Address value, Overflow_check overflow)
1287 typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype;
1288 Valtype* wv = reinterpret_cast<Valtype*>(view);
1289 elfcpp::Swap<valsize, big_endian>::writeval(wv, value);
1290 return overflowed<valsize>(value, overflow);
1293 template<int valsize>
1294 static inline Status
1295 rela(unsigned char* view,
1296 unsigned int right_shift,
1297 typename elfcpp::Valtype_base<valsize>::Valtype dst_mask,
1299 Overflow_check overflow)
1301 typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype;
1302 Valtype* wv = reinterpret_cast<Valtype*>(view);
1303 Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv);
1304 Valtype reloc = value >> right_shift;
1307 elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc);
1308 return overflowed<valsize>(value >> right_shift, overflow);
1311 // Do a simple RELA relocation, unaligned.
1312 template<int valsize>
1313 static inline Status
1314 rela_ua(unsigned char* view, Address value, Overflow_check overflow)
1316 elfcpp::Swap_unaligned<valsize, big_endian>::writeval(view, value);
1317 return overflowed<valsize>(value, overflow);
1320 template<int valsize>
1321 static inline Status
1322 rela_ua(unsigned char* view,
1323 unsigned int right_shift,
1324 typename elfcpp::Valtype_base<valsize>::Valtype dst_mask,
1326 Overflow_check overflow)
1328 typedef typename elfcpp::Swap_unaligned<valsize, big_endian>::Valtype
1330 Valtype val = elfcpp::Swap<valsize, big_endian>::readval(view);
1331 Valtype reloc = value >> right_shift;
1334 elfcpp::Swap_unaligned<valsize, big_endian>::writeval(view, val | reloc);
1335 return overflowed<valsize>(value >> right_shift, overflow);
1339 // R_PPC64_ADDR64: (Symbol + Addend)
1341 addr64(unsigned char* view, Address value)
1342 { This::template rela<64>(view, value, CHECK_NONE); }
1344 // R_PPC64_UADDR64: (Symbol + Addend) unaligned
1346 addr64_u(unsigned char* view, Address value)
1347 { This::template rela_ua<64>(view, value, CHECK_NONE); }
1349 // R_POWERPC_ADDR32: (Symbol + Addend)
1350 static inline Status
1351 addr32(unsigned char* view, Address value, Overflow_check overflow)
1352 { return This::template rela<32>(view, value, overflow); }
1354 // R_POWERPC_UADDR32: (Symbol + Addend) unaligned
1355 static inline Status
1356 addr32_u(unsigned char* view, Address value, Overflow_check overflow)
1357 { return This::template rela_ua<32>(view, value, overflow); }
1359 // R_POWERPC_ADDR24: (Symbol + Addend) & 0x3fffffc
1360 static inline Status
1361 addr24(unsigned char* view, Address value, Overflow_check overflow)
1363 Status stat = This::template rela<32>(view, 0, 0x03fffffc, value, overflow);
1364 if (overflow != CHECK_NONE && (value & 3) != 0)
1365 stat = STATUS_OVERFLOW;
1369 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff
1370 static inline Status
1371 addr16(unsigned char* view, Address value, Overflow_check overflow)
1372 { return This::template rela<16>(view, value, overflow); }
1374 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff, unaligned
1375 static inline Status
1376 addr16_u(unsigned char* view, Address value, Overflow_check overflow)
1377 { return This::template rela_ua<16>(view, value, overflow); }
1379 // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc
1380 static inline Status
1381 addr16_ds(unsigned char* view, Address value, Overflow_check overflow)
1383 Status stat = This::template rela<16>(view, 0, 0xfffc, value, overflow);
1384 if (overflow != CHECK_NONE && (value & 3) != 0)
1385 stat = STATUS_OVERFLOW;
1389 // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff
1391 addr16_hi(unsigned char* view, Address value)
1392 { This::template rela<16>(view, 16, 0xffff, value, CHECK_NONE); }
1394 // R_POWERPC_ADDR16_HA: ((Symbol + Addend + 0x8000) >> 16) & 0xffff
1396 addr16_ha(unsigned char* view, Address value)
1397 { This::addr16_hi(view, value + 0x8000); }
1399 // R_POWERPC_ADDR16_HIGHER: ((Symbol + Addend) >> 32) & 0xffff
1401 addr16_hi2(unsigned char* view, Address value)
1402 { This::template rela<16>(view, 32, 0xffff, value, CHECK_NONE); }
1404 // R_POWERPC_ADDR16_HIGHERA: ((Symbol + Addend + 0x8000) >> 32) & 0xffff
1406 addr16_ha2(unsigned char* view, Address value)
1407 { This::addr16_hi2(view, value + 0x8000); }
1409 // R_POWERPC_ADDR16_HIGHEST: ((Symbol + Addend) >> 48) & 0xffff
1411 addr16_hi3(unsigned char* view, Address value)
1412 { This::template rela<16>(view, 48, 0xffff, value, CHECK_NONE); }
1414 // R_POWERPC_ADDR16_HIGHESTA: ((Symbol + Addend + 0x8000) >> 48) & 0xffff
1416 addr16_ha3(unsigned char* view, Address value)
1417 { This::addr16_hi3(view, value + 0x8000); }
1419 // R_POWERPC_ADDR14: (Symbol + Addend) & 0xfffc
1420 static inline Status
1421 addr14(unsigned char* view, Address value, Overflow_check overflow)
1423 Status stat = This::template rela<32>(view, 0, 0xfffc, value, overflow);
1424 if (overflow != CHECK_NONE && (value & 3) != 0)
1425 stat = STATUS_OVERFLOW;
1430 // Stash away the index of .got2 or .opd in a relocatable object, if
1431 // such a section exists.
1433 template<int size, bool big_endian>
1435 Powerpc_relobj<size, big_endian>::do_find_special_sections(
1436 Read_symbols_data* sd)
1438 const unsigned char* const pshdrs = sd->section_headers->data();
1439 const unsigned char* namesu = sd->section_names->data();
1440 const char* names = reinterpret_cast<const char*>(namesu);
1441 section_size_type names_size = sd->section_names_size;
1442 const unsigned char* s;
1444 s = this->find_shdr(pshdrs, size == 32 ? ".got2" : ".opd",
1445 names, names_size, NULL);
1448 unsigned int ndx = (s - pshdrs) / elfcpp::Elf_sizes<size>::shdr_size;
1449 this->special_ = ndx;
1451 return Sized_relobj_file<size, big_endian>::do_find_special_sections(sd);
1454 // Examine .rela.opd to build info about function entry points.
1456 template<int size, bool big_endian>
1458 Powerpc_relobj<size, big_endian>::scan_opd_relocs(
1460 const unsigned char* prelocs,
1461 const unsigned char* plocal_syms)
1465 typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc
1467 const int reloc_size
1468 = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size;
1469 const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
1470 Address expected_off = 0;
1471 bool regular = true;
1472 unsigned int opd_ent_size = 0;
1474 for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size)
1476 Reltype reloc(prelocs);
1477 typename elfcpp::Elf_types<size>::Elf_WXword r_info
1478 = reloc.get_r_info();
1479 unsigned int r_type = elfcpp::elf_r_type<size>(r_info);
1480 if (r_type == elfcpp::R_PPC64_ADDR64)
1482 unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info);
1483 typename elfcpp::Elf_types<size>::Elf_Addr value;
1486 if (r_sym < this->local_symbol_count())
1488 typename elfcpp::Sym<size, big_endian>
1489 lsym(plocal_syms + r_sym * sym_size);
1490 shndx = lsym.get_st_shndx();
1491 shndx = this->adjust_sym_shndx(r_sym, shndx, &is_ordinary);
1492 value = lsym.get_st_value();
1495 shndx = this->symbol_section_and_value(r_sym, &value,
1497 this->set_opd_ent(reloc.get_r_offset(), shndx,
1498 value + reloc.get_r_addend());
1501 expected_off = reloc.get_r_offset();
1502 opd_ent_size = expected_off;
1504 else if (expected_off != reloc.get_r_offset())
1506 expected_off += opd_ent_size;
1508 else if (r_type == elfcpp::R_PPC64_TOC)
1510 if (expected_off - opd_ent_size + 8 != reloc.get_r_offset())
1515 gold_warning(_("%s: unexpected reloc type %u in .opd section"),
1516 this->name().c_str(), r_type);
1520 if (reloc_count <= 2)
1521 opd_ent_size = this->section_size(this->opd_shndx());
1522 if (opd_ent_size != 24 && opd_ent_size != 16)
1526 gold_warning(_("%s: .opd is not a regular array of opd entries"),
1527 this->name().c_str());
1533 template<int size, bool big_endian>
1535 Powerpc_relobj<size, big_endian>::do_read_relocs(Read_relocs_data* rd)
1537 Sized_relobj_file<size, big_endian>::do_read_relocs(rd);
1540 for (Read_relocs_data::Relocs_list::iterator p = rd->relocs.begin();
1541 p != rd->relocs.end();
1544 if (p->data_shndx == this->opd_shndx())
1546 uint64_t opd_size = this->section_size(this->opd_shndx());
1547 gold_assert(opd_size == static_cast<size_t>(opd_size));
1550 this->init_opd(opd_size);
1551 this->scan_opd_relocs(p->reloc_count, p->contents->data(),
1552 rd->local_symbols->data());
1560 // Set up some symbols.
1562 template<int size, bool big_endian>
1564 Target_powerpc<size, big_endian>::do_define_standard_symbols(
1565 Symbol_table* symtab,
1570 // Define _GLOBAL_OFFSET_TABLE_ to ensure it isn't seen as
1571 // undefined when scanning relocs (and thus requires
1572 // non-relative dynamic relocs). The proper value will be
1574 Symbol *gotsym = symtab->lookup("_GLOBAL_OFFSET_TABLE_", NULL);
1575 if (gotsym != NULL && gotsym->is_undefined())
1577 Target_powerpc<size, big_endian>* target =
1578 static_cast<Target_powerpc<size, big_endian>*>(
1579 parameters->sized_target<size, big_endian>());
1580 Output_data_got_powerpc<size, big_endian>* got
1581 = target->got_section(symtab, layout);
1582 symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL,
1583 Symbol_table::PREDEFINED,
1587 elfcpp::STV_HIDDEN, 0,
1591 // Define _SDA_BASE_ at the start of the .sdata section + 32768.
1592 Symbol *sdasym = symtab->lookup("_SDA_BASE_", NULL);
1593 if (sdasym != NULL && sdasym->is_undefined())
1595 Output_data_space* sdata = new Output_data_space(4, "** sdata");
1597 = layout->add_output_section_data(".sdata", 0,
1599 | elfcpp::SHF_WRITE,
1600 sdata, ORDER_SMALL_DATA, false);
1601 symtab->define_in_output_data("_SDA_BASE_", NULL,
1602 Symbol_table::PREDEFINED,
1603 os, 32768, 0, elfcpp::STT_OBJECT,
1604 elfcpp::STB_LOCAL, elfcpp::STV_HIDDEN,
1610 // Set up PowerPC target specific relobj.
1612 template<int size, bool big_endian>
1614 Target_powerpc<size, big_endian>::do_make_elf_object(
1615 const std::string& name,
1616 Input_file* input_file,
1617 off_t offset, const elfcpp::Ehdr<size, big_endian>& ehdr)
1619 int et = ehdr.get_e_type();
1620 // ET_EXEC files are valid input for --just-symbols/-R,
1621 // and we treat them as relocatable objects.
1622 if (et == elfcpp::ET_REL
1623 || (et == elfcpp::ET_EXEC && input_file->just_symbols()))
1625 Powerpc_relobj<size, big_endian>* obj =
1626 new Powerpc_relobj<size, big_endian>(name, input_file, offset, ehdr);
1630 else if (et == elfcpp::ET_DYN)
1632 Sized_dynobj<size, big_endian>* obj =
1633 new Sized_dynobj<size, big_endian>(name, input_file, offset, ehdr);
1639 gold_error(_("%s: unsupported ELF file type %d"), name.c_str(), et);
1644 template<int size, bool big_endian>
1645 class Output_data_got_powerpc : public Output_data_got<size, big_endian>
1648 typedef typename elfcpp::Elf_types<size>::Elf_Addr Valtype;
1649 typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Rela_dyn;
1651 Output_data_got_powerpc(Symbol_table* symtab, Layout* layout)
1652 : Output_data_got<size, big_endian>(),
1653 symtab_(symtab), layout_(layout),
1654 header_ent_cnt_(size == 32 ? 3 : 1),
1655 header_index_(size == 32 ? 0x2000 : 0)
1660 // Create a new GOT entry and return its offset.
1662 add_got_entry(Got_entry got_entry)
1664 this->reserve_ent();
1665 return Output_data_got<size, big_endian>::add_got_entry(got_entry);
1668 // Create a pair of new GOT entries and return the offset of the first.
1670 add_got_entry_pair(Got_entry got_entry_1, Got_entry got_entry_2)
1672 this->reserve_ent(2);
1673 return Output_data_got<size, big_endian>::add_got_entry_pair(got_entry_1,
1678 add_constant_pair(Valtype c1, Valtype c2)
1680 this->reserve_ent(2);
1681 unsigned int got_offset = this->add_constant(c1);
1682 this->add_constant(c2);
1686 // Offset of _GLOBAL_OFFSET_TABLE_.
1690 return this->got_offset(this->header_index_);
1693 // Offset of base used to access the GOT/TOC.
1694 // The got/toc pointer reg will be set to this value.
1696 got_base_offset(const Powerpc_relobj<size, big_endian>* object) const
1699 return this->g_o_t();
1701 return (this->output_section()->address()
1702 + object->toc_base_offset()
1706 // Ensure our GOT has a header.
1708 set_final_data_size()
1710 if (this->header_ent_cnt_ != 0)
1711 this->make_header();
1712 Output_data_got<size, big_endian>::set_final_data_size();
1715 // First word of GOT header needs some values that are not
1716 // handled by Output_data_got so poke them in here.
1717 // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase.
1719 do_write(Output_file* of)
1722 if (size == 32 && this->layout_->dynamic_data() != NULL)
1723 val = this->layout_->dynamic_section()->address();
1725 val = this->output_section()->address() + 0x8000;
1726 this->replace_constant(this->header_index_, val);
1727 Output_data_got<size, big_endian>::do_write(of);
1732 reserve_ent(unsigned int cnt = 1)
1734 if (this->header_ent_cnt_ == 0)
1736 if (this->num_entries() + cnt > this->header_index_)
1737 this->make_header();
1743 this->header_ent_cnt_ = 0;
1744 this->header_index_ = this->num_entries();
1747 Output_data_got<size, big_endian>::add_constant(0);
1748 Output_data_got<size, big_endian>::add_constant(0);
1749 Output_data_got<size, big_endian>::add_constant(0);
1751 // Define _GLOBAL_OFFSET_TABLE_ at the header
1752 Symbol *gotsym = this->symtab_->lookup("_GLOBAL_OFFSET_TABLE_", NULL);
1755 Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(gotsym);
1756 sym->set_value(this->g_o_t());
1759 this->symtab_->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL,
1760 Symbol_table::PREDEFINED,
1761 this, this->g_o_t(), 0,
1764 elfcpp::STV_HIDDEN, 0,
1768 Output_data_got<size, big_endian>::add_constant(0);
1771 // Stashed pointers.
1772 Symbol_table* symtab_;
1776 unsigned int header_ent_cnt_;
1777 // GOT header index.
1778 unsigned int header_index_;
1781 // Get the GOT section, creating it if necessary.
1783 template<int size, bool big_endian>
1784 Output_data_got_powerpc<size, big_endian>*
1785 Target_powerpc<size, big_endian>::got_section(Symbol_table* symtab,
1788 if (this->got_ == NULL)
1790 gold_assert(symtab != NULL && layout != NULL);
1793 = new Output_data_got_powerpc<size, big_endian>(symtab, layout);
1795 layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS,
1796 elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE,
1797 this->got_, ORDER_DATA, false);
1803 // Get the dynamic reloc section, creating it if necessary.
1805 template<int size, bool big_endian>
1806 typename Target_powerpc<size, big_endian>::Reloc_section*
1807 Target_powerpc<size, big_endian>::rela_dyn_section(Layout* layout)
1809 if (this->rela_dyn_ == NULL)
1811 gold_assert(layout != NULL);
1812 this->rela_dyn_ = new Reloc_section(parameters->options().combreloc());
1813 layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA,
1814 elfcpp::SHF_ALLOC, this->rela_dyn_,
1815 ORDER_DYNAMIC_RELOCS, false);
1817 return this->rela_dyn_;
1823 // Determine the stub group size. The group size is the absolute
1824 // value of the parameter --stub-group-size. If --stub-group-size
1825 // is passed a negative value, we restrict stubs to be always before
1826 // the stubbed branches.
1827 Stub_control(int32_t size)
1828 : state_(NO_GROUP), stub_group_size_(abs(size)),
1829 stub14_group_size_(abs(size)),
1830 stubs_always_before_branch_(size < 0), suppress_size_errors_(false),
1831 group_end_addr_(0), owner_(NULL), output_section_(NULL)
1833 if (stub_group_size_ == 1)
1836 if (stubs_always_before_branch_)
1838 stub_group_size_ = 0x1e00000;
1839 stub14_group_size_ = 0x7800;
1843 stub_group_size_ = 0x1c00000;
1844 stub14_group_size_ = 0x7000;
1846 suppress_size_errors_ = true;
1850 // Return true iff input section can be handled by current stub
1853 can_add_to_stub_group(Output_section* o,
1854 const Output_section::Input_section* i,
1857 const Output_section::Input_section*
1863 { return output_section_; }
1869 FINDING_STUB_SECTION,
1874 uint32_t stub_group_size_;
1875 uint32_t stub14_group_size_;
1876 bool stubs_always_before_branch_;
1877 bool suppress_size_errors_;
1878 uint64_t group_end_addr_;
1879 const Output_section::Input_section* owner_;
1880 Output_section* output_section_;
1883 // Return true iff input section can be handled by current stub/
1887 Stub_control::can_add_to_stub_group(Output_section* o,
1888 const Output_section::Input_section* i,
1892 = has14 ? this->stub14_group_size_ : this->stub_group_size_;
1893 bool whole_sec = o->order() == ORDER_INIT || o->order() == ORDER_FINI;
1895 uint64_t start_addr = o->address();
1898 // .init and .fini sections are pasted together to form a single
1899 // function. We can't be adding stubs in the middle of the function.
1900 this_size = o->data_size();
1903 start_addr += i->relobj()->output_section_offset(i->shndx());
1904 this_size = i->data_size();
1906 uint64_t end_addr = start_addr + this_size;
1907 bool toobig = this_size > group_size;
1909 if (toobig && !this->suppress_size_errors_)
1910 gold_warning(_("%s:%s exceeds group size"),
1911 i->relobj()->name().c_str(),
1912 i->relobj()->section_name(i->shndx()).c_str());
1914 if (this->state_ != HAS_STUB_SECTION
1915 && (!whole_sec || this->output_section_ != o))
1918 this->output_section_ = o;
1921 if (this->state_ == NO_GROUP)
1923 this->state_ = FINDING_STUB_SECTION;
1924 this->group_end_addr_ = end_addr;
1926 else if (this->group_end_addr_ - start_addr < group_size)
1928 // Adding this section would make the group larger than GROUP_SIZE.
1929 else if (this->state_ == FINDING_STUB_SECTION
1930 && !this->stubs_always_before_branch_
1933 // But wait, there's more! Input sections up to GROUP_SIZE
1934 // bytes before the stub table can be handled by it too.
1935 this->state_ = HAS_STUB_SECTION;
1936 this->group_end_addr_ = end_addr;
1940 this->state_ = NO_GROUP;
1946 // Look over all the input sections, deciding where to place stubs.
1948 template<int size, bool big_endian>
1950 Target_powerpc<size, big_endian>::group_sections(Layout* layout,
1953 Stub_control stub_control(parameters->options().stub_group_size());
1955 // Group input sections and insert stub table
1956 Stub_table<size, big_endian>* stub_table = NULL;
1957 Layout::Section_list section_list;
1958 layout->get_executable_sections(§ion_list);
1959 std::stable_sort(section_list.begin(), section_list.end(), Sort_sections());
1960 for (Layout::Section_list::reverse_iterator o = section_list.rbegin();
1961 o != section_list.rend();
1964 typedef Output_section::Input_section_list Input_section_list;
1965 for (Input_section_list::const_reverse_iterator i
1966 = (*o)->input_sections().rbegin();
1967 i != (*o)->input_sections().rend();
1970 if (i->is_input_section())
1972 Powerpc_relobj<size, big_endian>* ppcobj = static_cast
1973 <Powerpc_relobj<size, big_endian>*>(i->relobj());
1974 bool has14 = ppcobj->has_14bit_branch(i->shndx());
1975 if (!stub_control.can_add_to_stub_group(*o, &*i, has14))
1977 stub_table->init(stub_control.owner(),
1978 stub_control.output_section());
1981 if (stub_table == NULL)
1982 stub_table = this->new_stub_table();
1983 ppcobj->set_stub_table(i->shndx(), stub_table);
1987 if (stub_table != NULL)
1988 stub_table->init(stub_control.owner(), stub_control.output_section());
1991 // If this branch needs a plt call stub, or a long branch stub, make one.
1993 template<int size, bool big_endian>
1995 Target_powerpc<size, big_endian>::Branch_info::make_stub(
1996 Stub_table<size, big_endian>* stub_table,
1997 Stub_table<size, big_endian>* ifunc_stub_table,
1998 Symbol_table* symtab) const
2000 Symbol* sym = this->object_->global_symbol(this->r_sym_);
2001 if (sym != NULL && sym->is_forwarder())
2002 sym = symtab->resolve_forwards(sym);
2003 const Sized_symbol<size>* gsym = static_cast<const Sized_symbol<size>*>(sym);
2005 ? use_plt_offset<size>(gsym, Scan::get_reference_flags(this->r_type_))
2006 : this->object_->local_has_plt_offset(this->r_sym_))
2008 if (stub_table == NULL)
2009 stub_table = this->object_->stub_table(this->shndx_);
2010 if (stub_table == NULL)
2012 // This is a ref from a data section to an ifunc symbol.
2013 stub_table = ifunc_stub_table;
2015 gold_assert(stub_table != NULL);
2017 stub_table->add_plt_call_entry(this->object_, gsym,
2018 this->r_type_, this->addend_);
2020 stub_table->add_plt_call_entry(this->object_, this->r_sym_,
2021 this->r_type_, this->addend_);
2025 unsigned int max_branch_offset;
2026 if (this->r_type_ == elfcpp::R_POWERPC_REL14
2027 || this->r_type_ == elfcpp::R_POWERPC_REL14_BRTAKEN
2028 || this->r_type_ == elfcpp::R_POWERPC_REL14_BRNTAKEN)
2029 max_branch_offset = 1 << 15;
2030 else if (this->r_type_ == elfcpp::R_POWERPC_REL24
2031 || this->r_type_ == elfcpp::R_PPC_PLTREL24
2032 || this->r_type_ == elfcpp::R_PPC_LOCAL24PC)
2033 max_branch_offset = 1 << 25;
2036 Address from = this->object_->get_output_section_offset(this->shndx_);
2037 gold_assert(from != invalid_address);
2038 from += (this->object_->output_section(this->shndx_)->address()
2043 switch (gsym->source())
2045 case Symbol::FROM_OBJECT:
2047 Object* symobj = gsym->object();
2048 if (symobj->is_dynamic()
2049 || symobj->pluginobj() != NULL)
2052 unsigned int shndx = gsym->shndx(&is_ordinary);
2053 if (shndx == elfcpp::SHN_UNDEF)
2058 case Symbol::IS_UNDEFINED:
2064 Symbol_table::Compute_final_value_status status;
2065 to = symtab->compute_final_value<size>(gsym, &status);
2066 if (status != Symbol_table::CFVS_OK)
2071 const Symbol_value<size>* psymval
2072 = this->object_->local_symbol(this->r_sym_);
2073 Symbol_value<size> symval;
2074 typedef Sized_relobj_file<size, big_endian> ObjType;
2075 typename ObjType::Compute_final_local_value_status status
2076 = this->object_->compute_final_local_value(this->r_sym_, psymval,
2078 if (status != ObjType::CFLV_OK
2079 || !symval.has_output_value())
2081 to = symval.value(this->object_, 0);
2083 to += this->addend_;
2084 if (stub_table == NULL)
2085 stub_table = this->object_->stub_table(this->shndx_);
2086 gold_assert(stub_table != NULL);
2087 if (size == 64 && is_branch_reloc(this->r_type_))
2089 unsigned int dest_shndx;
2090 to = stub_table->targ()->symval_for_branch(to, gsym, this->object_,
2093 Address delta = to - from;
2094 if (delta + max_branch_offset >= 2 * max_branch_offset)
2096 stub_table->add_long_branch_entry(this->object_, to);
2101 // Relaxation hook. This is where we do stub generation.
2103 template<int size, bool big_endian>
2105 Target_powerpc<size, big_endian>::do_relax(int pass,
2106 const Input_objects*,
2107 Symbol_table* symtab,
2111 unsigned int prev_brlt_size = 0;
2114 bool thread_safe = parameters->options().plt_thread_safe();
2115 if (size == 64 && !parameters->options().user_set_plt_thread_safe())
2117 const char* const thread_starter[] =
2121 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
2123 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
2124 "mq_notify", "create_timer",
2128 "GOMP_parallel_start",
2129 "GOMP_parallel_loop_static_start",
2130 "GOMP_parallel_loop_dynamic_start",
2131 "GOMP_parallel_loop_guided_start",
2132 "GOMP_parallel_loop_runtime_start",
2133 "GOMP_parallel_sections_start",
2136 for (unsigned int i = 0;
2137 i < sizeof(thread_starter) / sizeof(thread_starter[0]);
2140 Symbol* sym = symtab->lookup(thread_starter[i], NULL);
2141 thread_safe = sym != NULL && sym->in_reg() && sym->in_real_elf();
2146 this->plt_thread_safe_ = thread_safe;
2147 this->group_sections(layout, task);
2150 // We need address of stub tables valid for make_stub.
2151 for (typename Stub_tables::iterator p = this->stub_tables_.begin();
2152 p != this->stub_tables_.end();
2155 const Powerpc_relobj<size, big_endian>* object
2156 = static_cast<const Powerpc_relobj<size, big_endian>*>((*p)->relobj());
2157 Address off = object->get_output_section_offset((*p)->shndx());
2158 gold_assert(off != invalid_address);
2159 Output_section* os = (*p)->output_section();
2160 (*p)->set_address_and_size(os, off);
2165 // Clear plt call stubs, long branch stubs and branch lookup table.
2166 prev_brlt_size = this->branch_lookup_table_.size();
2167 this->branch_lookup_table_.clear();
2168 for (typename Stub_tables::iterator p = this->stub_tables_.begin();
2169 p != this->stub_tables_.end();
2172 (*p)->clear_stubs();
2176 // Build all the stubs.
2177 Stub_table<size, big_endian>* ifunc_stub_table
2178 = this->stub_tables_.size() == 0 ? NULL : this->stub_tables_[0];
2179 Stub_table<size, big_endian>* one_stub_table
2180 = this->stub_tables_.size() != 1 ? NULL : ifunc_stub_table;
2181 for (typename Branches::const_iterator b = this->branch_info_.begin();
2182 b != this->branch_info_.end();
2185 b->make_stub(one_stub_table, ifunc_stub_table, symtab);
2188 // Did anything change size?
2189 unsigned int num_huge_branches = this->branch_lookup_table_.size();
2190 bool again = num_huge_branches != prev_brlt_size;
2191 if (size == 64 && num_huge_branches != 0)
2192 this->make_brlt_section(layout);
2193 if (size == 64 && again)
2194 this->brlt_section_->set_current_size(num_huge_branches);
2196 typedef Unordered_set<Output_section*> Output_sections;
2197 Output_sections os_need_update;
2198 for (typename Stub_tables::iterator p = this->stub_tables_.begin();
2199 p != this->stub_tables_.end();
2202 if ((*p)->size_update())
2205 os_need_update.insert((*p)->output_section());
2209 // Set output section offsets for all input sections in an output
2210 // section that just changed size. Anything past the stubs will
2212 for (typename Output_sections::iterator p = os_need_update.begin();
2213 p != os_need_update.end();
2216 Output_section* os = *p;
2218 typedef Output_section::Input_section_list Input_section_list;
2219 for (Input_section_list::const_iterator i = os->input_sections().begin();
2220 i != os->input_sections().end();
2223 off = align_address(off, i->addralign());
2224 if (i->is_input_section() || i->is_relaxed_input_section())
2225 i->relobj()->set_section_offset(i->shndx(), off);
2226 if (i->is_relaxed_input_section())
2228 Stub_table<size, big_endian>* stub_table
2229 = static_cast<Stub_table<size, big_endian>*>(
2230 i->relaxed_input_section());
2231 off += stub_table->set_address_and_size(os, off);
2234 off += i->data_size();
2236 // If .brlt is part of this output section, then we have just
2237 // done the offset adjustment.
2238 os->clear_section_offsets_need_adjustment();
2243 && num_huge_branches != 0
2244 && parameters->options().output_is_position_independent())
2246 // Fill in the BRLT relocs.
2247 this->brlt_section_->reset_data_size();
2248 for (typename Branch_lookup_table::const_iterator p
2249 = this->branch_lookup_table_.begin();
2250 p != this->branch_lookup_table_.end();
2253 this->brlt_section_->add_reloc(p->first, p->second);
2255 this->brlt_section_->finalize_data_size();
2260 // A class to handle the PLT data.
2262 template<int size, bool big_endian>
2263 class Output_data_plt_powerpc : public Output_section_data_build
2266 typedef Output_data_reloc<elfcpp::SHT_RELA, true,
2267 size, big_endian> Reloc_section;
2269 Output_data_plt_powerpc(Target_powerpc<size, big_endian>* targ,
2270 Reloc_section* plt_rel,
2271 unsigned int reserved_size,
2273 : Output_section_data_build(size == 32 ? 4 : 8),
2276 initial_plt_entry_size_(reserved_size),
2280 // Add an entry to the PLT.
2285 add_ifunc_entry(Symbol*);
2288 add_local_ifunc_entry(Sized_relobj_file<size, big_endian>*, unsigned int);
2290 // Return the .rela.plt section data.
2297 // Return the number of PLT entries.
2301 return ((this->current_data_size() - this->initial_plt_entry_size_)
2305 // Return the offset of the first non-reserved PLT entry.
2307 first_plt_entry_offset()
2308 { return this->initial_plt_entry_size_; }
2310 // Return the size of a PLT entry.
2312 get_plt_entry_size()
2313 { return plt_entry_size; }
2317 do_adjust_output_section(Output_section* os)
2322 // Write to a map file.
2324 do_print_to_mapfile(Mapfile* mapfile) const
2325 { mapfile->print_output_data(this, this->name_); }
2328 // The size of an entry in the PLT.
2329 static const int plt_entry_size = size == 32 ? 4 : 24;
2331 // Write out the PLT data.
2333 do_write(Output_file*);
2335 // The reloc section.
2336 Reloc_section* rel_;
2337 // Allows access to .glink for do_write.
2338 Target_powerpc<size, big_endian>* targ_;
2339 // The size of the first reserved entry.
2340 int initial_plt_entry_size_;
2341 // What to report in map file.
2345 // Add an entry to the PLT.
2347 template<int size, bool big_endian>
2349 Output_data_plt_powerpc<size, big_endian>::add_entry(Symbol* gsym)
2351 if (!gsym->has_plt_offset())
2353 section_size_type off = this->current_data_size();
2355 off += this->first_plt_entry_offset();
2356 gsym->set_plt_offset(off);
2357 gsym->set_needs_dynsym_entry();
2358 unsigned int dynrel = elfcpp::R_POWERPC_JMP_SLOT;
2359 this->rel_->add_global(gsym, dynrel, this, off, 0);
2360 off += plt_entry_size;
2361 this->set_current_data_size(off);
2365 // Add an entry for a global ifunc symbol that resolves locally, to the IPLT.
2367 template<int size, bool big_endian>
2369 Output_data_plt_powerpc<size, big_endian>::add_ifunc_entry(Symbol* gsym)
2371 if (!gsym->has_plt_offset())
2373 section_size_type off = this->current_data_size();
2374 gsym->set_plt_offset(off);
2375 unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE;
2377 dynrel = elfcpp::R_PPC64_JMP_IREL;
2378 this->rel_->add_symbolless_global_addend(gsym, dynrel, this, off, 0);
2379 off += plt_entry_size;
2380 this->set_current_data_size(off);
2384 // Add an entry for a local ifunc symbol to the IPLT.
2386 template<int size, bool big_endian>
2388 Output_data_plt_powerpc<size, big_endian>::add_local_ifunc_entry(
2389 Sized_relobj_file<size, big_endian>* relobj,
2390 unsigned int local_sym_index)
2392 if (!relobj->local_has_plt_offset(local_sym_index))
2394 section_size_type off = this->current_data_size();
2395 relobj->set_local_plt_offset(local_sym_index, off);
2396 unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE;
2398 dynrel = elfcpp::R_PPC64_JMP_IREL;
2399 this->rel_->add_symbolless_local_addend(relobj, local_sym_index, dynrel,
2401 off += plt_entry_size;
2402 this->set_current_data_size(off);
2406 static const uint32_t add_0_11_11 = 0x7c0b5a14;
2407 static const uint32_t add_2_2_11 = 0x7c425a14;
2408 static const uint32_t add_3_3_2 = 0x7c631214;
2409 static const uint32_t add_3_3_13 = 0x7c636a14;
2410 static const uint32_t add_11_0_11 = 0x7d605a14;
2411 static const uint32_t add_12_2_11 = 0x7d825a14;
2412 static const uint32_t add_12_12_11 = 0x7d8c5a14;
2413 static const uint32_t addi_11_11 = 0x396b0000;
2414 static const uint32_t addi_12_12 = 0x398c0000;
2415 static const uint32_t addi_2_2 = 0x38420000;
2416 static const uint32_t addi_3_2 = 0x38620000;
2417 static const uint32_t addi_3_3 = 0x38630000;
2418 static const uint32_t addis_0_2 = 0x3c020000;
2419 static const uint32_t addis_0_13 = 0x3c0d0000;
2420 static const uint32_t addis_11_11 = 0x3d6b0000;
2421 static const uint32_t addis_11_30 = 0x3d7e0000;
2422 static const uint32_t addis_12_12 = 0x3d8c0000;
2423 static const uint32_t addis_12_2 = 0x3d820000;
2424 static const uint32_t addis_3_2 = 0x3c620000;
2425 static const uint32_t addis_3_13 = 0x3c6d0000;
2426 static const uint32_t b = 0x48000000;
2427 static const uint32_t bcl_20_31 = 0x429f0005;
2428 static const uint32_t bctr = 0x4e800420;
2429 static const uint32_t blr = 0x4e800020;
2430 static const uint32_t blrl = 0x4e800021;
2431 static const uint32_t bnectr_p4 = 0x4ce20420;
2432 static const uint32_t cmpldi_2_0 = 0x28220000;
2433 static const uint32_t cror_15_15_15 = 0x4def7b82;
2434 static const uint32_t cror_31_31_31 = 0x4ffffb82;
2435 static const uint32_t ld_0_1 = 0xe8010000;
2436 static const uint32_t ld_0_12 = 0xe80c0000;
2437 static const uint32_t ld_11_12 = 0xe96c0000;
2438 static const uint32_t ld_11_2 = 0xe9620000;
2439 static const uint32_t ld_2_1 = 0xe8410000;
2440 static const uint32_t ld_2_11 = 0xe84b0000;
2441 static const uint32_t ld_2_12 = 0xe84c0000;
2442 static const uint32_t ld_2_2 = 0xe8420000;
2443 static const uint32_t lfd_0_1 = 0xc8010000;
2444 static const uint32_t li_0_0 = 0x38000000;
2445 static const uint32_t li_12_0 = 0x39800000;
2446 static const uint32_t lis_0_0 = 0x3c000000;
2447 static const uint32_t lis_11 = 0x3d600000;
2448 static const uint32_t lis_12 = 0x3d800000;
2449 static const uint32_t lwz_0_12 = 0x800c0000;
2450 static const uint32_t lwz_11_11 = 0x816b0000;
2451 static const uint32_t lwz_11_30 = 0x817e0000;
2452 static const uint32_t lwz_12_12 = 0x818c0000;
2453 static const uint32_t lwzu_0_12 = 0x840c0000;
2454 static const uint32_t lvx_0_12_0 = 0x7c0c00ce;
2455 static const uint32_t mflr_0 = 0x7c0802a6;
2456 static const uint32_t mflr_11 = 0x7d6802a6;
2457 static const uint32_t mflr_12 = 0x7d8802a6;
2458 static const uint32_t mtctr_0 = 0x7c0903a6;
2459 static const uint32_t mtctr_11 = 0x7d6903a6;
2460 static const uint32_t mtctr_12 = 0x7d8903a6;
2461 static const uint32_t mtlr_0 = 0x7c0803a6;
2462 static const uint32_t mtlr_12 = 0x7d8803a6;
2463 static const uint32_t nop = 0x60000000;
2464 static const uint32_t ori_0_0_0 = 0x60000000;
2465 static const uint32_t std_0_1 = 0xf8010000;
2466 static const uint32_t std_0_12 = 0xf80c0000;
2467 static const uint32_t std_2_1 = 0xf8410000;
2468 static const uint32_t stfd_0_1 = 0xd8010000;
2469 static const uint32_t stvx_0_12_0 = 0x7c0c01ce;
2470 static const uint32_t sub_11_11_12 = 0x7d6c5850;
2471 static const uint32_t xor_11_11_11 = 0x7d6b5a78;
2473 // Write out the PLT.
2475 template<int size, bool big_endian>
2477 Output_data_plt_powerpc<size, big_endian>::do_write(Output_file* of)
2481 const section_size_type offset = this->offset();
2482 const section_size_type oview_size
2483 = convert_to_section_size_type(this->data_size());
2484 unsigned char* const oview = of->get_output_view(offset, oview_size);
2485 unsigned char* pov = oview;
2486 unsigned char* endpov = oview + oview_size;
2488 // The address of the .glink branch table
2489 const Output_data_glink<size, big_endian>* glink
2490 = this->targ_->glink_section();
2491 elfcpp::Elf_types<32>::Elf_Addr branch_tab = glink->address();
2493 while (pov < endpov)
2495 elfcpp::Swap<32, big_endian>::writeval(pov, branch_tab);
2500 of->write_output_view(offset, oview_size, oview);
2504 // Create the PLT section.
2506 template<int size, bool big_endian>
2508 Target_powerpc<size, big_endian>::make_plt_section(Symbol_table* symtab,
2511 if (this->plt_ == NULL)
2513 if (this->got_ == NULL)
2514 this->got_section(symtab, layout);
2516 if (this->glink_ == NULL)
2517 make_glink_section(layout);
2519 // Ensure that .rela.dyn always appears before .rela.plt This is
2520 // necessary due to how, on PowerPC and some other targets, .rela.dyn
2521 // needs to include .rela.plt in it's range.
2522 this->rela_dyn_section(layout);
2524 Reloc_section* plt_rel = new Reloc_section(false);
2525 layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA,
2526 elfcpp::SHF_ALLOC, plt_rel,
2527 ORDER_DYNAMIC_PLT_RELOCS, false);
2529 = new Output_data_plt_powerpc<size, big_endian>(this, plt_rel,
2530 size == 32 ? 0 : 24,
2532 layout->add_output_section_data(".plt",
2534 ? elfcpp::SHT_PROGBITS
2535 : elfcpp::SHT_NOBITS),
2536 elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE,
2545 // Create the IPLT section.
2547 template<int size, bool big_endian>
2549 Target_powerpc<size, big_endian>::make_iplt_section(Symbol_table* symtab,
2552 if (this->iplt_ == NULL)
2554 this->make_plt_section(symtab, layout);
2556 Reloc_section* iplt_rel = new Reloc_section(false);
2557 this->rela_dyn_->output_section()->add_output_section_data(iplt_rel);
2559 = new Output_data_plt_powerpc<size, big_endian>(this, iplt_rel,
2561 this->plt_->output_section()->add_output_section_data(this->iplt_);
2565 // A section for huge long branch addresses, similar to plt section.
2567 template<int size, bool big_endian>
2568 class Output_data_brlt_powerpc : public Output_section_data_build
2571 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
2572 typedef Output_data_reloc<elfcpp::SHT_RELA, true,
2573 size, big_endian> Reloc_section;
2575 Output_data_brlt_powerpc(Target_powerpc<size, big_endian>* targ,
2576 Reloc_section* brlt_rel)
2577 : Output_section_data_build(size == 32 ? 4 : 8),
2582 // Add a reloc for an entry in the BRLT.
2584 add_reloc(Address to, unsigned int off)
2585 { this->rel_->add_relative(elfcpp::R_POWERPC_RELATIVE, this, off, to); }
2587 // Update section and reloc section size.
2589 set_current_size(unsigned int num_branches)
2591 this->reset_address_and_file_offset();
2592 this->set_current_data_size(num_branches * 16);
2593 this->finalize_data_size();
2594 Output_section* os = this->output_section();
2595 os->set_section_offsets_need_adjustment();
2596 if (this->rel_ != NULL)
2598 unsigned int reloc_size
2599 = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size;
2600 this->rel_->reset_address_and_file_offset();
2601 this->rel_->set_current_data_size(num_branches * reloc_size);
2602 this->rel_->finalize_data_size();
2603 Output_section* os = this->rel_->output_section();
2604 os->set_section_offsets_need_adjustment();
2610 do_adjust_output_section(Output_section* os)
2615 // Write to a map file.
2617 do_print_to_mapfile(Mapfile* mapfile) const
2618 { mapfile->print_output_data(this, "** BRLT"); }
2621 // Write out the BRLT data.
2623 do_write(Output_file*);
2625 // The reloc section.
2626 Reloc_section* rel_;
2627 Target_powerpc<size, big_endian>* targ_;
2630 // Make the branch lookup table section.
2632 template<int size, bool big_endian>
2634 Target_powerpc<size, big_endian>::make_brlt_section(Layout* layout)
2636 if (size == 64 && this->brlt_section_ == NULL)
2638 Reloc_section* brlt_rel = NULL;
2639 bool is_pic = parameters->options().output_is_position_independent();
2642 // When PIC we can't fill in .brlt (like .plt it can be a
2643 // bss style section) but must initialise at runtime via
2644 // dynamic relocats.
2645 this->rela_dyn_section(layout);
2646 brlt_rel = new Reloc_section(false);
2647 this->rela_dyn_->output_section()->add_output_section_data(brlt_rel);
2650 = new Output_data_brlt_powerpc<size, big_endian>(this, brlt_rel);
2651 if (this->plt_ && is_pic)
2652 this->plt_->output_section()
2653 ->add_output_section_data(this->brlt_section_);
2655 layout->add_output_section_data(".brlt",
2656 (is_pic ? elfcpp::SHT_NOBITS
2657 : elfcpp::SHT_PROGBITS),
2658 elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE,
2659 this->brlt_section_,
2660 (is_pic ? ORDER_SMALL_BSS
2661 : ORDER_SMALL_DATA),
2666 // Write out .brlt when non-PIC.
2668 template<int size, bool big_endian>
2670 Output_data_brlt_powerpc<size, big_endian>::do_write(Output_file* of)
2672 if (size == 64 && !parameters->options().output_is_position_independent())
2674 const section_size_type offset = this->offset();
2675 const section_size_type oview_size
2676 = convert_to_section_size_type(this->data_size());
2677 unsigned char* const oview = of->get_output_view(offset, oview_size);
2679 this->targ_->write_branch_lookup_table(oview);
2680 of->write_output_view(offset, oview_size, oview);
2684 static inline uint32_t
2690 static inline uint32_t
2696 static inline uint32_t
2699 return hi(a + 0x8000);
2702 template<bool big_endian>
2704 write_insn(unsigned char* p, uint32_t v)
2706 elfcpp::Swap<32, big_endian>::writeval(p, v);
2709 // Stub_table holds information about plt and long branch stubs.
2710 // Stubs are built in an area following some input section determined
2711 // by group_sections(). This input section is converted to a relaxed
2712 // input section allowing it to be resized to accommodate the stubs
2714 template<int size, bool big_endian>
2715 class Stub_table : public Output_relaxed_input_section
2718 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
2719 static const Address invalid_address = static_cast<Address>(0) - 1;
2721 Stub_table(Target_powerpc<size, big_endian>* targ)
2722 : Output_relaxed_input_section(NULL, 0, 0),
2723 targ_(targ), plt_call_stubs_(), long_branch_stubs_(),
2724 orig_data_size_(0), plt_size_(0), last_plt_size_(0),
2725 branch_size_(0), last_branch_size_(0)
2728 // Delayed Output_relaxed_input_section init.
2730 init(const Output_section::Input_section*, Output_section*);
2732 // Add a plt call stub.
2734 add_plt_call_entry(const Sized_relobj_file<size, big_endian>*,
2740 add_plt_call_entry(const Sized_relobj_file<size, big_endian>*,
2745 // Find a given plt call stub.
2747 find_plt_call_entry(const Symbol*) const;
2750 find_plt_call_entry(const Sized_relobj_file<size, big_endian>*,
2751 unsigned int) const;
2754 find_plt_call_entry(const Sized_relobj_file<size, big_endian>*,
2760 find_plt_call_entry(const Sized_relobj_file<size, big_endian>*,
2765 // Add a long branch stub.
2767 add_long_branch_entry(const Powerpc_relobj<size, big_endian>*, Address);
2770 find_long_branch_entry(const Powerpc_relobj<size, big_endian>*, Address);
2775 this->plt_call_stubs_.clear();
2776 this->plt_size_ = 0;
2777 this->long_branch_stubs_.clear();
2778 this->branch_size_ = 0;
2782 set_address_and_size(const Output_section* os, Address off)
2784 Address start_off = off;
2785 off += this->orig_data_size_;
2786 Address my_size = this->plt_size_ + this->branch_size_;
2788 off = align_address(off, this->stub_align());
2789 // Include original section size and alignment padding in size
2790 my_size += off - start_off;
2791 this->reset_address_and_file_offset();
2792 this->set_current_data_size(my_size);
2793 this->set_address_and_file_offset(os->address() + start_off,
2794 os->offset() + start_off);
2801 return align_address(this->address() + this->orig_data_size_,
2802 this->stub_align());
2808 return align_address(this->offset() + this->orig_data_size_,
2809 this->stub_align());
2814 { return this->plt_size_; }
2819 Output_section* os = this->output_section();
2820 if (os->addralign() < this->stub_align())
2822 os->set_addralign(this->stub_align());
2823 // FIXME: get rid of the insane checkpointing.
2824 // We can't increase alignment of the input section to which
2825 // stubs are attached; The input section may be .init which
2826 // is pasted together with other .init sections to form a
2827 // function. Aligning might insert zero padding resulting in
2828 // sigill. However we do need to increase alignment of the
2829 // output section so that the align_address() on offset in
2830 // set_address_and_size() adds the same padding as the
2831 // align_address() on address in stub_address().
2832 // What's more, we need this alignment for the layout done in
2833 // relaxation_loop_body() so that the output section starts at
2834 // a suitably aligned address.
2835 os->checkpoint_set_addralign(this->stub_align());
2837 if (this->last_plt_size_ != this->plt_size_
2838 || this->last_branch_size_ != this->branch_size_)
2840 this->last_plt_size_ = this->plt_size_;
2841 this->last_branch_size_ = this->branch_size_;
2847 Target_powerpc<size, big_endian>*
2853 class Plt_stub_ent_hash;
2854 typedef Unordered_map<Plt_stub_ent, unsigned int,
2855 Plt_stub_ent_hash> Plt_stub_entries;
2857 // Alignment of stub section.
2863 unsigned int min_align = 32;
2864 unsigned int user_align = 1 << parameters->options().plt_align();
2865 return std::max(user_align, min_align);
2868 // Size of a given plt call stub.
2870 plt_call_size(typename Plt_stub_entries::const_iterator p) const
2875 Address pltaddr = p->second;
2876 if (p->first.sym_ == NULL
2877 || (p->first.sym_->type() == elfcpp::STT_GNU_IFUNC
2878 && p->first.sym_->can_use_relative_reloc(false)))
2879 pltaddr += this->targ_->iplt_section()->address();
2881 pltaddr += this->targ_->plt_section()->address();
2882 Address tocbase = this->targ_->got_section()->output_section()->address();
2883 const Powerpc_relobj<size, big_endian>* ppcobj = static_cast
2884 <const Powerpc_relobj<size, big_endian>*>(p->first.object_);
2885 tocbase += ppcobj->toc_base_offset();
2886 Address off = pltaddr - tocbase;
2887 bool static_chain = parameters->options().plt_static_chain();
2888 bool thread_safe = this->targ_->plt_thread_safe();
2889 unsigned int bytes = (4 * 5
2892 + 4 * (ha(off) != 0)
2893 + 4 * (ha(off + 8 + 8 * static_chain) != ha(off)));
2894 unsigned int align = 1 << parameters->options().plt_align();
2896 bytes = (bytes + align - 1) & -align;
2900 // Return long branch stub size.
2902 branch_stub_size(Address to)
2905 = this->stub_address() + this->last_plt_size_ + this->branch_size_;
2906 if (to - loc + (1 << 25) < 2 << 25)
2908 if (size == 64 || !parameters->options().output_is_position_independent())
2915 do_write(Output_file*);
2917 // Plt call stub keys.
2921 Plt_stub_ent(const Symbol* sym)
2922 : sym_(sym), object_(0), addend_(0), locsym_(0)
2925 Plt_stub_ent(const Sized_relobj_file<size, big_endian>* object,
2926 unsigned int locsym_index)
2927 : sym_(NULL), object_(object), addend_(0), locsym_(locsym_index)
2930 Plt_stub_ent(const Sized_relobj_file<size, big_endian>* object,
2932 unsigned int r_type,
2934 : sym_(sym), object_(0), addend_(0), locsym_(0)
2937 this->addend_ = addend;
2938 else if (parameters->options().output_is_position_independent()
2939 && r_type == elfcpp::R_PPC_PLTREL24)
2941 this->addend_ = addend;
2942 if (this->addend_ >= 32768)
2943 this->object_ = object;
2947 Plt_stub_ent(const Sized_relobj_file<size, big_endian>* object,
2948 unsigned int locsym_index,
2949 unsigned int r_type,
2951 : sym_(NULL), object_(object), addend_(0), locsym_(locsym_index)
2954 this->addend_ = addend;
2955 else if (parameters->options().output_is_position_independent()
2956 && r_type == elfcpp::R_PPC_PLTREL24)
2957 this->addend_ = addend;
2960 bool operator==(const Plt_stub_ent& that) const
2962 return (this->sym_ == that.sym_
2963 && this->object_ == that.object_
2964 && this->addend_ == that.addend_
2965 && this->locsym_ == that.locsym_);
2969 const Sized_relobj_file<size, big_endian>* object_;
2970 typename elfcpp::Elf_types<size>::Elf_Addr addend_;
2971 unsigned int locsym_;
2974 class Plt_stub_ent_hash
2977 size_t operator()(const Plt_stub_ent& ent) const
2979 return (reinterpret_cast<uintptr_t>(ent.sym_)
2980 ^ reinterpret_cast<uintptr_t>(ent.object_)
2986 // Long branch stub keys.
2987 class Branch_stub_ent
2990 Branch_stub_ent(const Powerpc_relobj<size, big_endian>* obj, Address to)
2991 : dest_(to), toc_base_off_(0)
2994 toc_base_off_ = obj->toc_base_offset();
2997 bool operator==(const Branch_stub_ent& that) const
2999 return (this->dest_ == that.dest_
3001 || this->toc_base_off_ == that.toc_base_off_));
3005 unsigned int toc_base_off_;
3008 class Branch_stub_ent_hash
3011 size_t operator()(const Branch_stub_ent& ent) const
3012 { return ent.dest_ ^ ent.toc_base_off_; }
3015 // In a sane world this would be a global.
3016 Target_powerpc<size, big_endian>* targ_;
3017 // Map sym/object/addend to stub offset.
3018 Plt_stub_entries plt_call_stubs_;
3019 // Map destination address to stub offset.
3020 typedef Unordered_map<Branch_stub_ent, unsigned int,
3021 Branch_stub_ent_hash> Branch_stub_entries;
3022 Branch_stub_entries long_branch_stubs_;
3023 // size of input section
3024 section_size_type orig_data_size_;
3026 section_size_type plt_size_, last_plt_size_, branch_size_, last_branch_size_;
3029 // Make a new stub table, and record.
3031 template<int size, bool big_endian>
3032 Stub_table<size, big_endian>*
3033 Target_powerpc<size, big_endian>::new_stub_table()
3035 Stub_table<size, big_endian>* stub_table
3036 = new Stub_table<size, big_endian>(this);
3037 this->stub_tables_.push_back(stub_table);
3041 // Delayed stub table initialisation, because we create the stub table
3042 // before we know to which section it will be attached.
3044 template<int size, bool big_endian>
3046 Stub_table<size, big_endian>::init(
3047 const Output_section::Input_section* owner,
3048 Output_section* output_section)
3050 this->set_relobj(owner->relobj());
3051 this->set_shndx(owner->shndx());
3052 this->set_addralign(this->relobj()->section_addralign(this->shndx()));
3053 this->set_output_section(output_section);
3054 this->orig_data_size_ = owner->current_data_size();
3056 std::vector<Output_relaxed_input_section*> new_relaxed;
3057 new_relaxed.push_back(this);
3058 output_section->convert_input_sections_to_relaxed_sections(new_relaxed);
3061 // Add a plt call stub, if we do not already have one for this
3062 // sym/object/addend combo.
3064 template<int size, bool big_endian>
3066 Stub_table<size, big_endian>::add_plt_call_entry(
3067 const Sized_relobj_file<size, big_endian>* object,
3069 unsigned int r_type,
3072 Plt_stub_ent ent(object, gsym, r_type, addend);
3073 Address off = this->plt_size_;
3074 std::pair<typename Plt_stub_entries::iterator, bool> p
3075 = this->plt_call_stubs_.insert(std::make_pair(ent, off));
3077 this->plt_size_ = off + this->plt_call_size(p.first);
3080 template<int size, bool big_endian>
3082 Stub_table<size, big_endian>::add_plt_call_entry(
3083 const Sized_relobj_file<size, big_endian>* object,
3084 unsigned int locsym_index,
3085 unsigned int r_type,
3088 Plt_stub_ent ent(object, locsym_index, r_type, addend);
3089 Address off = this->plt_size_;
3090 std::pair<typename Plt_stub_entries::iterator, bool> p
3091 = this->plt_call_stubs_.insert(std::make_pair(ent, off));
3093 this->plt_size_ = off + this->plt_call_size(p.first);
3096 // Find a plt call stub.
3098 template<int size, bool big_endian>
3099 typename elfcpp::Elf_types<size>::Elf_Addr
3100 Stub_table<size, big_endian>::find_plt_call_entry(
3101 const Sized_relobj_file<size, big_endian>* object,
3103 unsigned int r_type,
3104 Address addend) const
3106 Plt_stub_ent ent(object, gsym, r_type, addend);
3107 typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent);
3108 return p == this->plt_call_stubs_.end() ? invalid_address : p->second;
3111 template<int size, bool big_endian>
3112 typename elfcpp::Elf_types<size>::Elf_Addr
3113 Stub_table<size, big_endian>::find_plt_call_entry(const Symbol* gsym) const
3115 Plt_stub_ent ent(gsym);
3116 typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent);
3117 return p == this->plt_call_stubs_.end() ? invalid_address : p->second;
3120 template<int size, bool big_endian>
3121 typename elfcpp::Elf_types<size>::Elf_Addr
3122 Stub_table<size, big_endian>::find_plt_call_entry(
3123 const Sized_relobj_file<size, big_endian>* object,
3124 unsigned int locsym_index,
3125 unsigned int r_type,
3126 Address addend) const
3128 Plt_stub_ent ent(object, locsym_index, r_type, addend);
3129 typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent);
3130 return p == this->plt_call_stubs_.end() ? invalid_address : p->second;
3133 template<int size, bool big_endian>
3134 typename elfcpp::Elf_types<size>::Elf_Addr
3135 Stub_table<size, big_endian>::find_plt_call_entry(
3136 const Sized_relobj_file<size, big_endian>* object,
3137 unsigned int locsym_index) const
3139 Plt_stub_ent ent(object, locsym_index);
3140 typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent);
3141 return p == this->plt_call_stubs_.end() ? invalid_address : p->second;
3144 // Add a long branch stub if we don't already have one to given
3147 template<int size, bool big_endian>
3149 Stub_table<size, big_endian>::add_long_branch_entry(
3150 const Powerpc_relobj<size, big_endian>* object,
3153 Branch_stub_ent ent(object, to);
3154 Address off = this->branch_size_;
3155 if (this->long_branch_stubs_.insert(std::make_pair(ent, off)).second)
3157 unsigned int stub_size = this->branch_stub_size(to);
3158 this->branch_size_ = off + stub_size;
3159 if (size == 64 && stub_size != 4)
3160 this->targ_->add_branch_lookup_table(to);
3164 // Find long branch stub.
3166 template<int size, bool big_endian>
3167 typename elfcpp::Elf_types<size>::Elf_Addr
3168 Stub_table<size, big_endian>::find_long_branch_entry(
3169 const Powerpc_relobj<size, big_endian>* object,
3172 Branch_stub_ent ent(object, to);
3173 typename Branch_stub_entries::const_iterator p
3174 = this->long_branch_stubs_.find(ent);
3175 return p == this->long_branch_stubs_.end() ? invalid_address : p->second;
3178 // A class to handle .glink.
3180 template<int size, bool big_endian>
3181 class Output_data_glink : public Output_section_data
3184 static const int pltresolve_size = 16*4;
3186 Output_data_glink(Target_powerpc<size, big_endian>* targ)
3187 : Output_section_data(16), targ_(targ)
3191 // Write to a map file.
3193 do_print_to_mapfile(Mapfile* mapfile) const
3194 { mapfile->print_output_data(this, _("** glink")); }
3198 set_final_data_size();
3202 do_write(Output_file*);
3204 // Allows access to .got and .plt for do_write.
3205 Target_powerpc<size, big_endian>* targ_;
3208 template<int size, bool big_endian>
3210 Output_data_glink<size, big_endian>::set_final_data_size()
3212 unsigned int count = this->targ_->plt_entry_count();
3213 section_size_type total = 0;
3219 // space for branch table
3220 total += 4 * (count - 1);
3222 total += -total & 15;
3223 total += this->pltresolve_size;
3227 total += this->pltresolve_size;
3229 // space for branch table
3232 total += 4 * (count - 0x8000);
3236 this->set_data_size(total);
3239 // Write out plt and long branch stub code.
3241 template<int size, bool big_endian>
3243 Stub_table<size, big_endian>::do_write(Output_file* of)
3245 if (this->plt_call_stubs_.empty()
3246 && this->long_branch_stubs_.empty())
3249 const section_size_type start_off = this->offset();
3250 const section_size_type off = this->stub_offset();
3251 const section_size_type oview_size =
3252 convert_to_section_size_type(this->data_size() - (off - start_off));
3253 unsigned char* const oview = of->get_output_view(off, oview_size);
3258 const Output_data_got_powerpc<size, big_endian>* got
3259 = this->targ_->got_section();
3260 Address got_os_addr = got->output_section()->address();
3262 if (!this->plt_call_stubs_.empty())
3264 // The base address of the .plt section.
3265 Address plt_base = this->targ_->plt_section()->address();
3266 Address iplt_base = invalid_address;
3268 // Write out plt call stubs.
3269 typename Plt_stub_entries::const_iterator cs;
3270 for (cs = this->plt_call_stubs_.begin();
3271 cs != this->plt_call_stubs_.end();
3276 const Symbol* gsym = cs->first.sym_;
3279 is_ifunc = (gsym->type() == elfcpp::STT_GNU_IFUNC
3280 && gsym->can_use_relative_reloc(false));
3281 pltoff = gsym->plt_offset();
3286 const Sized_relobj_file<size, big_endian>* relobj
3287 = cs->first.object_;
3288 unsigned int local_sym_index = cs->first.locsym_;
3289 pltoff = relobj->local_plt_offset(local_sym_index);
3291 Address plt_addr = pltoff;
3294 if (iplt_base == invalid_address)
3295 iplt_base = this->targ_->iplt_section()->address();
3296 plt_addr += iplt_base;
3299 plt_addr += plt_base;
3300 const Powerpc_relobj<size, big_endian>* ppcobj = static_cast
3301 <const Powerpc_relobj<size, big_endian>*>(cs->first.object_);
3302 Address got_addr = got_os_addr + ppcobj->toc_base_offset();
3303 Address off = plt_addr - got_addr;
3305 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
3306 gold_error(_("%s: linkage table error against `%s'"),
3307 cs->first.object_->name().c_str(),
3308 cs->first.sym_->demangled_name().c_str());
3310 bool static_chain = parameters->options().plt_static_chain();
3311 bool thread_safe = this->targ_->plt_thread_safe();
3312 bool use_fake_dep = false;
3313 Address cmp_branch_off = 0;
3316 unsigned int pltindex
3317 = ((pltoff - this->targ_->first_plt_entry_offset())
3318 / this->targ_->plt_entry_size());
3320 = (this->targ_->glink_section()->pltresolve_size
3322 if (pltindex > 32768)
3323 glinkoff += (pltindex - 32768) * 4;
3325 = this->targ_->glink_section()->address() + glinkoff;
3327 = (this->stub_address() + cs->second + 24
3328 + 4 * (ha(off) != 0)
3329 + 4 * (ha(off + 8 + 8 * static_chain) != ha(off))
3330 + 4 * static_chain);
3331 cmp_branch_off = to - from;
3332 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
3335 p = oview + cs->second;
3338 write_insn<big_endian>(p, std_2_1 + 40), p += 4;
3339 write_insn<big_endian>(p, addis_12_2 + ha(off)), p += 4;
3340 write_insn<big_endian>(p, ld_11_12 + l(off)), p += 4;
3341 if (ha(off + 8 + 8 * static_chain) != ha(off))
3343 write_insn<big_endian>(p, addi_12_12 + l(off)), p += 4;
3346 write_insn<big_endian>(p, mtctr_11), p += 4;
3349 write_insn<big_endian>(p, xor_11_11_11), p += 4;
3350 write_insn<big_endian>(p, add_12_12_11), p += 4;
3352 write_insn<big_endian>(p, ld_2_12 + l(off + 8)), p += 4;
3354 write_insn<big_endian>(p, ld_11_12 + l(off + 16)), p += 4;
3358 write_insn<big_endian>(p, std_2_1 + 40), p += 4;
3359 write_insn<big_endian>(p, ld_11_2 + l(off)), p += 4;
3360 if (ha(off + 8 + 8 * static_chain) != ha(off))
3362 write_insn<big_endian>(p, addi_2_2 + l(off)), p += 4;
3365 write_insn<big_endian>(p, mtctr_11), p += 4;
3368 write_insn<big_endian>(p, xor_11_11_11), p += 4;
3369 write_insn<big_endian>(p, add_2_2_11), p += 4;
3372 write_insn<big_endian>(p, ld_11_2 + l(off + 16)), p += 4;
3373 write_insn<big_endian>(p, ld_2_2 + l(off + 8)), p += 4;
3375 if (thread_safe && !use_fake_dep)
3377 write_insn<big_endian>(p, cmpldi_2_0), p += 4;
3378 write_insn<big_endian>(p, bnectr_p4), p += 4;
3379 write_insn<big_endian>(p, b | (cmp_branch_off & 0x3fffffc));
3382 write_insn<big_endian>(p, bctr);
3386 // Write out long branch stubs.
3387 typename Branch_stub_entries::const_iterator bs;
3388 for (bs = this->long_branch_stubs_.begin();
3389 bs != this->long_branch_stubs_.end();
3392 p = oview + this->plt_size_ + bs->second;
3393 Address loc = this->stub_address() + this->plt_size_ + bs->second;
3394 Address delta = bs->first.dest_ - loc;
3395 if (delta + (1 << 25) < 2 << 25)
3396 write_insn<big_endian>(p, b | (delta & 0x3fffffc));
3400 = this->targ_->find_branch_lookup_table(bs->first.dest_);
3401 gold_assert(brlt_addr != invalid_address);
3402 brlt_addr += this->targ_->brlt_section()->address();
3403 Address got_addr = got_os_addr + bs->first.toc_base_off_;
3404 Address brltoff = brlt_addr - got_addr;
3405 if (ha(brltoff) == 0)
3407 write_insn<big_endian>(p, ld_11_2 + l(brltoff)), p += 4;
3411 write_insn<big_endian>(p, addis_12_2 + ha(brltoff)), p += 4;
3412 write_insn<big_endian>(p, ld_11_12 + l(brltoff)), p += 4;
3414 write_insn<big_endian>(p, mtctr_11), p += 4;
3415 write_insn<big_endian>(p, bctr);
3421 if (!this->plt_call_stubs_.empty())
3423 // The base address of the .plt section.
3424 Address plt_base = this->targ_->plt_section()->address();
3425 Address iplt_base = invalid_address;
3426 // The address of _GLOBAL_OFFSET_TABLE_.
3427 Address g_o_t = invalid_address;
3429 // Write out plt call stubs.
3430 typename Plt_stub_entries::const_iterator cs;
3431 for (cs = this->plt_call_stubs_.begin();
3432 cs != this->plt_call_stubs_.end();
3437 const Symbol* gsym = cs->first.sym_;
3440 is_ifunc = (gsym->type() == elfcpp::STT_GNU_IFUNC
3441 && gsym->can_use_relative_reloc(false));
3442 plt_addr = gsym->plt_offset();
3447 const Sized_relobj_file<size, big_endian>* relobj
3448 = cs->first.object_;
3449 unsigned int local_sym_index = cs->first.locsym_;
3450 plt_addr = relobj->local_plt_offset(local_sym_index);
3454 if (iplt_base == invalid_address)
3455 iplt_base = this->targ_->iplt_section()->address();
3456 plt_addr += iplt_base;
3459 plt_addr += plt_base;
3461 p = oview + cs->second;
3462 if (parameters->options().output_is_position_independent())
3465 const Powerpc_relobj<size, big_endian>* ppcobj
3466 = (static_cast<const Powerpc_relobj<size, big_endian>*>
3467 (cs->first.object_));
3468 if (ppcobj != NULL && cs->first.addend_ >= 32768)
3470 unsigned int got2 = ppcobj->got2_shndx();
3471 got_addr = ppcobj->get_output_section_offset(got2);
3472 gold_assert(got_addr != invalid_address);
3473 got_addr += (ppcobj->output_section(got2)->address()
3474 + cs->first.addend_);
3478 if (g_o_t == invalid_address)
3480 const Output_data_got_powerpc<size, big_endian>* got
3481 = this->targ_->got_section();
3482 g_o_t = got->address() + got->g_o_t();
3487 Address off = plt_addr - got_addr;
3490 write_insn<big_endian>(p + 0, lwz_11_30 + l(off));
3491 write_insn<big_endian>(p + 4, mtctr_11);
3492 write_insn<big_endian>(p + 8, bctr);
3496 write_insn<big_endian>(p + 0, addis_11_30 + ha(off));
3497 write_insn<big_endian>(p + 4, lwz_11_11 + l(off));
3498 write_insn<big_endian>(p + 8, mtctr_11);
3499 write_insn<big_endian>(p + 12, bctr);
3504 write_insn<big_endian>(p + 0, lis_11 + ha(plt_addr));
3505 write_insn<big_endian>(p + 4, lwz_11_11 + l(plt_addr));
3506 write_insn<big_endian>(p + 8, mtctr_11);
3507 write_insn<big_endian>(p + 12, bctr);
3512 // Write out long branch stubs.
3513 typename Branch_stub_entries::const_iterator bs;
3514 for (bs = this->long_branch_stubs_.begin();
3515 bs != this->long_branch_stubs_.end();
3518 p = oview + this->plt_size_ + bs->second;
3519 Address loc = this->stub_address() + this->plt_size_ + bs->second;
3520 Address delta = bs->first.dest_ - loc;
3521 if (delta + (1 << 25) < 2 << 25)
3522 write_insn<big_endian>(p, b | (delta & 0x3fffffc));
3523 else if (!parameters->options().output_is_position_independent())
3525 write_insn<big_endian>(p + 0, lis_12 + ha(bs->first.dest_));
3526 write_insn<big_endian>(p + 4, addi_12_12 + l(bs->first.dest_));
3527 write_insn<big_endian>(p + 8, mtctr_12);
3528 write_insn<big_endian>(p + 12, bctr);
3533 write_insn<big_endian>(p + 0, mflr_0);
3534 write_insn<big_endian>(p + 4, bcl_20_31);
3535 write_insn<big_endian>(p + 8, mflr_12);
3536 write_insn<big_endian>(p + 12, addis_12_12 + ha(delta));
3537 write_insn<big_endian>(p + 16, addi_12_12 + l(delta));
3538 write_insn<big_endian>(p + 20, mtlr_0);
3539 write_insn<big_endian>(p + 24, mtctr_12);
3540 write_insn<big_endian>(p + 28, bctr);
3546 // Write out .glink.
3548 template<int size, bool big_endian>
3550 Output_data_glink<size, big_endian>::do_write(Output_file* of)
3552 const section_size_type off = this->offset();
3553 const section_size_type oview_size =
3554 convert_to_section_size_type(this->data_size());
3555 unsigned char* const oview = of->get_output_view(off, oview_size);
3558 // The base address of the .plt section.
3559 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
3560 Address plt_base = this->targ_->plt_section()->address();
3564 // Write pltresolve stub.
3566 Address after_bcl = this->address() + 16;
3567 Address pltoff = plt_base - after_bcl;
3569 elfcpp::Swap<64, big_endian>::writeval(p, pltoff), p += 8;
3571 write_insn<big_endian>(p, mflr_12), p += 4;
3572 write_insn<big_endian>(p, bcl_20_31), p += 4;
3573 write_insn<big_endian>(p, mflr_11), p += 4;
3574 write_insn<big_endian>(p, ld_2_11 + l(-16)), p += 4;
3575 write_insn<big_endian>(p, mtlr_12), p += 4;
3576 write_insn<big_endian>(p, add_12_2_11), p += 4;
3577 write_insn<big_endian>(p, ld_11_12 + 0), p += 4;
3578 write_insn<big_endian>(p, ld_2_12 + 8), p += 4;
3579 write_insn<big_endian>(p, mtctr_11), p += 4;
3580 write_insn<big_endian>(p, ld_11_12 + 16), p += 4;
3581 write_insn<big_endian>(p, bctr), p += 4;
3582 while (p < oview + this->pltresolve_size)
3583 write_insn<big_endian>(p, nop), p += 4;
3585 // Write lazy link call stubs.
3587 while (p < oview + oview_size)
3591 write_insn<big_endian>(p, li_0_0 + indx), p += 4;
3595 write_insn<big_endian>(p, lis_0_0 + hi(indx)), p += 4;
3596 write_insn<big_endian>(p, ori_0_0_0 + l(indx)), p += 4;
3598 uint32_t branch_off = 8 - (p - oview);
3599 write_insn<big_endian>(p, b + (branch_off & 0x3fffffc)), p += 4;
3605 const Output_data_got_powerpc<size, big_endian>* got
3606 = this->targ_->got_section();
3607 // The address of _GLOBAL_OFFSET_TABLE_.
3608 Address g_o_t = got->address() + got->g_o_t();
3610 // Write out pltresolve branch table.
3612 unsigned int the_end = oview_size - this->pltresolve_size;
3613 unsigned char* end_p = oview + the_end;
3614 while (p < end_p - 8 * 4)
3615 write_insn<big_endian>(p, b + end_p - p), p += 4;
3617 write_insn<big_endian>(p, nop), p += 4;
3619 // Write out pltresolve call stub.
3620 if (parameters->options().output_is_position_independent())
3622 Address res0_off = 0;
3623 Address after_bcl_off = the_end + 12;
3624 Address bcl_res0 = after_bcl_off - res0_off;
3626 write_insn<big_endian>(p + 0, addis_11_11 + ha(bcl_res0));
3627 write_insn<big_endian>(p + 4, mflr_0);
3628 write_insn<big_endian>(p + 8, bcl_20_31);
3629 write_insn<big_endian>(p + 12, addi_11_11 + l(bcl_res0));
3630 write_insn<big_endian>(p + 16, mflr_12);
3631 write_insn<big_endian>(p + 20, mtlr_0);
3632 write_insn<big_endian>(p + 24, sub_11_11_12);
3634 Address got_bcl = g_o_t + 4 - (after_bcl_off + this->address());
3636 write_insn<big_endian>(p + 28, addis_12_12 + ha(got_bcl));
3637 if (ha(got_bcl) == ha(got_bcl + 4))
3639 write_insn<big_endian>(p + 32, lwz_0_12 + l(got_bcl));
3640 write_insn<big_endian>(p + 36, lwz_12_12 + l(got_bcl + 4));
3644 write_insn<big_endian>(p + 32, lwzu_0_12 + l(got_bcl));
3645 write_insn<big_endian>(p + 36, lwz_12_12 + 4);
3647 write_insn<big_endian>(p + 40, mtctr_0);
3648 write_insn<big_endian>(p + 44, add_0_11_11);
3649 write_insn<big_endian>(p + 48, add_11_0_11);
3650 write_insn<big_endian>(p + 52, bctr);
3651 write_insn<big_endian>(p + 56, nop);
3652 write_insn<big_endian>(p + 60, nop);
3656 Address res0 = this->address();
3658 write_insn<big_endian>(p + 0, lis_12 + ha(g_o_t + 4));
3659 write_insn<big_endian>(p + 4, addis_11_11 + ha(-res0));
3660 if (ha(g_o_t + 4) == ha(g_o_t + 8))
3661 write_insn<big_endian>(p + 8, lwz_0_12 + l(g_o_t + 4));
3663 write_insn<big_endian>(p + 8, lwzu_0_12 + l(g_o_t + 4));
3664 write_insn<big_endian>(p + 12, addi_11_11 + l(-res0));
3665 write_insn<big_endian>(p + 16, mtctr_0);
3666 write_insn<big_endian>(p + 20, add_0_11_11);
3667 if (ha(g_o_t + 4) == ha(g_o_t + 8))
3668 write_insn<big_endian>(p + 24, lwz_12_12 + l(g_o_t + 8));
3670 write_insn<big_endian>(p + 24, lwz_12_12 + 4);
3671 write_insn<big_endian>(p + 28, add_11_0_11);
3672 write_insn<big_endian>(p + 32, bctr);
3673 write_insn<big_endian>(p + 36, nop);
3674 write_insn<big_endian>(p + 40, nop);
3675 write_insn<big_endian>(p + 44, nop);
3676 write_insn<big_endian>(p + 48, nop);
3677 write_insn<big_endian>(p + 52, nop);
3678 write_insn<big_endian>(p + 56, nop);
3679 write_insn<big_endian>(p + 60, nop);
3684 of->write_output_view(off, oview_size, oview);
3688 // A class to handle linker generated save/restore functions.
3690 template<int size, bool big_endian>
3691 class Output_data_save_res : public Output_section_data_build
3694 Output_data_save_res(Symbol_table* symtab);
3697 // Write to a map file.
3699 do_print_to_mapfile(Mapfile* mapfile) const
3700 { mapfile->print_output_data(this, _("** save/restore")); }
3703 do_write(Output_file*);
3706 // The maximum size of save/restore contents.
3707 static const unsigned int savres_max = 218*4;
3710 savres_define(Symbol_table* symtab,
3712 unsigned int lo, unsigned int hi,
3713 unsigned char* write_ent(unsigned char*, int),
3714 unsigned char* write_tail(unsigned char*, int));
3716 unsigned char *contents_;
3719 template<bool big_endian>
3720 static unsigned char*
3721 savegpr0(unsigned char* p, int r)
3723 uint32_t insn = std_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8;
3724 write_insn<big_endian>(p, insn);
3728 template<bool big_endian>
3729 static unsigned char*
3730 savegpr0_tail(unsigned char* p, int r)
3732 p = savegpr0<big_endian>(p, r);
3733 uint32_t insn = std_0_1 + 16;
3734 write_insn<big_endian>(p, insn);
3736 write_insn<big_endian>(p, blr);
3740 template<bool big_endian>
3741 static unsigned char*
3742 restgpr0(unsigned char* p, int r)
3744 uint32_t insn = ld_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8;
3745 write_insn<big_endian>(p, insn);
3749 template<bool big_endian>
3750 static unsigned char*
3751 restgpr0_tail(unsigned char* p, int r)
3753 uint32_t insn = ld_0_1 + 16;
3754 write_insn<big_endian>(p, insn);
3756 p = restgpr0<big_endian>(p, r);
3757 write_insn<big_endian>(p, mtlr_0);
3761 p = restgpr0<big_endian>(p, 30);
3762 p = restgpr0<big_endian>(p, 31);
3764 write_insn<big_endian>(p, blr);
3768 template<bool big_endian>
3769 static unsigned char*
3770 savegpr1(unsigned char* p, int r)
3772 uint32_t insn = std_0_12 + (r << 21) + (1 << 16) - (32 - r) * 8;
3773 write_insn<big_endian>(p, insn);
3777 template<bool big_endian>
3778 static unsigned char*
3779 savegpr1_tail(unsigned char* p, int r)
3781 p = savegpr1<big_endian>(p, r);
3782 write_insn<big_endian>(p, blr);
3786 template<bool big_endian>
3787 static unsigned char*
3788 restgpr1(unsigned char* p, int r)
3790 uint32_t insn = ld_0_12 + (r << 21) + (1 << 16) - (32 - r) * 8;
3791 write_insn<big_endian>(p, insn);
3795 template<bool big_endian>
3796 static unsigned char*
3797 restgpr1_tail(unsigned char* p, int r)
3799 p = restgpr1<big_endian>(p, r);
3800 write_insn<big_endian>(p, blr);
3804 template<bool big_endian>
3805 static unsigned char*
3806 savefpr(unsigned char* p, int r)
3808 uint32_t insn = stfd_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8;
3809 write_insn<big_endian>(p, insn);
3813 template<bool big_endian>
3814 static unsigned char*
3815 savefpr0_tail(unsigned char* p, int r)
3817 p = savefpr<big_endian>(p, r);
3818 write_insn<big_endian>(p, std_0_1 + 16);
3820 write_insn<big_endian>(p, blr);
3824 template<bool big_endian>
3825 static unsigned char*
3826 restfpr(unsigned char* p, int r)
3828 uint32_t insn = lfd_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8;
3829 write_insn<big_endian>(p, insn);
3833 template<bool big_endian>
3834 static unsigned char*
3835 restfpr0_tail(unsigned char* p, int r)
3837 write_insn<big_endian>(p, ld_0_1 + 16);
3839 p = restfpr<big_endian>(p, r);
3840 write_insn<big_endian>(p, mtlr_0);
3844 p = restfpr<big_endian>(p, 30);
3845 p = restfpr<big_endian>(p, 31);
3847 write_insn<big_endian>(p, blr);
3851 template<bool big_endian>
3852 static unsigned char*
3853 savefpr1_tail(unsigned char* p, int r)
3855 p = savefpr<big_endian>(p, r);
3856 write_insn<big_endian>(p, blr);
3860 template<bool big_endian>
3861 static unsigned char*
3862 restfpr1_tail(unsigned char* p, int r)
3864 p = restfpr<big_endian>(p, r);
3865 write_insn<big_endian>(p, blr);
3869 template<bool big_endian>
3870 static unsigned char*
3871 savevr(unsigned char* p, int r)
3873 uint32_t insn = li_12_0 + (1 << 16) - (32 - r) * 16;
3874 write_insn<big_endian>(p, insn);
3876 insn = stvx_0_12_0 + (r << 21);
3877 write_insn<big_endian>(p, insn);
3881 template<bool big_endian>
3882 static unsigned char*
3883 savevr_tail(unsigned char* p, int r)
3885 p = savevr<big_endian>(p, r);
3886 write_insn<big_endian>(p, blr);
3890 template<bool big_endian>
3891 static unsigned char*
3892 restvr(unsigned char* p, int r)
3894 uint32_t insn = li_12_0 + (1 << 16) - (32 - r) * 16;
3895 write_insn<big_endian>(p, insn);
3897 insn = lvx_0_12_0 + (r << 21);
3898 write_insn<big_endian>(p, insn);
3902 template<bool big_endian>
3903 static unsigned char*
3904 restvr_tail(unsigned char* p, int r)
3906 p = restvr<big_endian>(p, r);
3907 write_insn<big_endian>(p, blr);
3912 template<int size, bool big_endian>
3913 Output_data_save_res<size, big_endian>::Output_data_save_res(
3914 Symbol_table* symtab)
3915 : Output_section_data_build(4),
3918 this->savres_define(symtab,
3919 "_savegpr0_", 14, 31,
3920 savegpr0<big_endian>, savegpr0_tail<big_endian>);
3921 this->savres_define(symtab,
3922 "_restgpr0_", 14, 29,
3923 restgpr0<big_endian>, restgpr0_tail<big_endian>);
3924 this->savres_define(symtab,
3925 "_restgpr0_", 30, 31,
3926 restgpr0<big_endian>, restgpr0_tail<big_endian>);
3927 this->savres_define(symtab,
3928 "_savegpr1_", 14, 31,
3929 savegpr1<big_endian>, savegpr1_tail<big_endian>);
3930 this->savres_define(symtab,
3931 "_restgpr1_", 14, 31,
3932 restgpr1<big_endian>, restgpr1_tail<big_endian>);
3933 this->savres_define(symtab,
3934 "_savefpr_", 14, 31,
3935 savefpr<big_endian>, savefpr0_tail<big_endian>);
3936 this->savres_define(symtab,
3937 "_restfpr_", 14, 29,
3938 restfpr<big_endian>, restfpr0_tail<big_endian>);
3939 this->savres_define(symtab,
3940 "_restfpr_", 30, 31,
3941 restfpr<big_endian>, restfpr0_tail<big_endian>);
3942 this->savres_define(symtab,
3944 savefpr<big_endian>, savefpr1_tail<big_endian>);
3945 this->savres_define(symtab,
3947 restfpr<big_endian>, restfpr1_tail<big_endian>);
3948 this->savres_define(symtab,
3950 savevr<big_endian>, savevr_tail<big_endian>);
3951 this->savres_define(symtab,
3953 restvr<big_endian>, restvr_tail<big_endian>);
3956 template<int size, bool big_endian>
3958 Output_data_save_res<size, big_endian>::savres_define(
3959 Symbol_table* symtab,
3961 unsigned int lo, unsigned int hi,
3962 unsigned char* write_ent(unsigned char*, int),
3963 unsigned char* write_tail(unsigned char*, int))
3965 size_t len = strlen(name);
3966 bool writing = false;
3969 memcpy(sym, name, len);
3972 for (unsigned int i = lo; i <= hi; i++)
3974 sym[len + 0] = i / 10 + '0';
3975 sym[len + 1] = i % 10 + '0';
3976 Symbol* gsym = symtab->lookup(sym);
3977 bool refd = gsym != NULL && gsym->is_undefined();
3978 writing = writing || refd;
3981 if (this->contents_ == NULL)
3982 this->contents_ = new unsigned char[this->savres_max];
3984 section_size_type value = this->current_data_size();
3985 unsigned char* p = this->contents_ + value;
3987 p = write_ent(p, i);
3989 p = write_tail(p, i);
3990 section_size_type cur_size = p - this->contents_;
3991 this->set_current_data_size(cur_size);
3993 symtab->define_in_output_data(sym, NULL, Symbol_table::PREDEFINED,
3994 this, value, cur_size - value,
3995 elfcpp::STT_FUNC, elfcpp::STB_GLOBAL,
3996 elfcpp::STV_HIDDEN, 0, false, false);
4001 // Write out save/restore.
4003 template<int size, bool big_endian>
4005 Output_data_save_res<size, big_endian>::do_write(Output_file* of)
4007 const section_size_type off = this->offset();
4008 const section_size_type oview_size =
4009 convert_to_section_size_type(this->data_size());
4010 unsigned char* const oview = of->get_output_view(off, oview_size);
4011 memcpy(oview, this->contents_, oview_size);
4012 of->write_output_view(off, oview_size, oview);
4016 // Create the glink section.
4018 template<int size, bool big_endian>
4020 Target_powerpc<size, big_endian>::make_glink_section(Layout* layout)
4022 if (this->glink_ == NULL)
4024 this->glink_ = new Output_data_glink<size, big_endian>(this);
4025 layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS,
4026 elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR,
4027 this->glink_, ORDER_TEXT, false);
4031 // Create a PLT entry for a global symbol.
4033 template<int size, bool big_endian>
4035 Target_powerpc<size, big_endian>::make_plt_entry(Symbol_table* symtab,
4039 if (gsym->type() == elfcpp::STT_GNU_IFUNC
4040 && gsym->can_use_relative_reloc(false))
4042 if (this->iplt_ == NULL)
4043 this->make_iplt_section(symtab, layout);
4044 this->iplt_->add_ifunc_entry(gsym);
4048 if (this->plt_ == NULL)
4049 this->make_plt_section(symtab, layout);
4050 this->plt_->add_entry(gsym);
4054 // Make a PLT entry for a local STT_GNU_IFUNC symbol.
4056 template<int size, bool big_endian>
4058 Target_powerpc<size, big_endian>::make_local_ifunc_plt_entry(
4059 Symbol_table* symtab,
4061 Sized_relobj_file<size, big_endian>* relobj,
4064 if (this->iplt_ == NULL)
4065 this->make_iplt_section(symtab, layout);
4066 this->iplt_->add_local_ifunc_entry(relobj, r_sym);
4069 // Return the number of entries in the PLT.
4071 template<int size, bool big_endian>
4073 Target_powerpc<size, big_endian>::plt_entry_count() const
4075 if (this->plt_ == NULL)
4077 unsigned int count = this->plt_->entry_count();
4078 if (this->iplt_ != NULL)
4079 count += this->iplt_->entry_count();
4083 // Return the offset of the first non-reserved PLT entry.
4085 template<int size, bool big_endian>
4087 Target_powerpc<size, big_endian>::first_plt_entry_offset() const
4089 return this->plt_->first_plt_entry_offset();
4092 // Return the size of each PLT entry.
4094 template<int size, bool big_endian>
4096 Target_powerpc<size, big_endian>::plt_entry_size() const
4098 return Output_data_plt_powerpc<size, big_endian>::get_plt_entry_size();
4101 // Create a GOT entry for local dynamic __tls_get_addr calls.
4103 template<int size, bool big_endian>
4105 Target_powerpc<size, big_endian>::tlsld_got_offset(
4106 Symbol_table* symtab,
4108 Sized_relobj_file<size, big_endian>* object)
4110 if (this->tlsld_got_offset_ == -1U)
4112 gold_assert(symtab != NULL && layout != NULL && object != NULL);
4113 Reloc_section* rela_dyn = this->rela_dyn_section(layout);
4114 Output_data_got_powerpc<size, big_endian>* got
4115 = this->got_section(symtab, layout);
4116 unsigned int got_offset = got->add_constant_pair(0, 0);
4117 rela_dyn->add_local(object, 0, elfcpp::R_POWERPC_DTPMOD, got,
4119 this->tlsld_got_offset_ = got_offset;
4121 return this->tlsld_got_offset_;
4124 // Get the Reference_flags for a particular relocation.
4126 template<int size, bool big_endian>
4128 Target_powerpc<size, big_endian>::Scan::get_reference_flags(unsigned int r_type)
4132 case elfcpp::R_POWERPC_NONE:
4133 case elfcpp::R_POWERPC_GNU_VTINHERIT:
4134 case elfcpp::R_POWERPC_GNU_VTENTRY:
4135 case elfcpp::R_PPC64_TOC:
4136 // No symbol reference.
4139 case elfcpp::R_PPC64_ADDR64:
4140 case elfcpp::R_PPC64_UADDR64:
4141 case elfcpp::R_POWERPC_ADDR32:
4142 case elfcpp::R_POWERPC_UADDR32:
4143 case elfcpp::R_POWERPC_ADDR16:
4144 case elfcpp::R_POWERPC_UADDR16:
4145 case elfcpp::R_POWERPC_ADDR16_LO:
4146 case elfcpp::R_POWERPC_ADDR16_HI:
4147 case elfcpp::R_POWERPC_ADDR16_HA:
4148 return Symbol::ABSOLUTE_REF;
4150 case elfcpp::R_POWERPC_ADDR24:
4151 case elfcpp::R_POWERPC_ADDR14:
4152 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
4153 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
4154 return Symbol::FUNCTION_CALL | Symbol::ABSOLUTE_REF;
4156 case elfcpp::R_PPC64_REL64:
4157 case elfcpp::R_POWERPC_REL32:
4158 case elfcpp::R_PPC_LOCAL24PC:
4159 case elfcpp::R_POWERPC_REL16:
4160 case elfcpp::R_POWERPC_REL16_LO:
4161 case elfcpp::R_POWERPC_REL16_HI:
4162 case elfcpp::R_POWERPC_REL16_HA:
4163 return Symbol::RELATIVE_REF;
4165 case elfcpp::R_POWERPC_REL24:
4166 case elfcpp::R_PPC_PLTREL24:
4167 case elfcpp::R_POWERPC_REL14:
4168 case elfcpp::R_POWERPC_REL14_BRTAKEN:
4169 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
4170 return Symbol::FUNCTION_CALL | Symbol::RELATIVE_REF;
4172 case elfcpp::R_POWERPC_GOT16:
4173 case elfcpp::R_POWERPC_GOT16_LO:
4174 case elfcpp::R_POWERPC_GOT16_HI:
4175 case elfcpp::R_POWERPC_GOT16_HA:
4176 case elfcpp::R_PPC64_GOT16_DS:
4177 case elfcpp::R_PPC64_GOT16_LO_DS:
4178 case elfcpp::R_PPC64_TOC16:
4179 case elfcpp::R_PPC64_TOC16_LO:
4180 case elfcpp::R_PPC64_TOC16_HI:
4181 case elfcpp::R_PPC64_TOC16_HA:
4182 case elfcpp::R_PPC64_TOC16_DS:
4183 case elfcpp::R_PPC64_TOC16_LO_DS:
4185 return Symbol::ABSOLUTE_REF;
4187 case elfcpp::R_POWERPC_GOT_TPREL16:
4188 case elfcpp::R_POWERPC_TLS:
4189 return Symbol::TLS_REF;
4191 case elfcpp::R_POWERPC_COPY:
4192 case elfcpp::R_POWERPC_GLOB_DAT:
4193 case elfcpp::R_POWERPC_JMP_SLOT:
4194 case elfcpp::R_POWERPC_RELATIVE:
4195 case elfcpp::R_POWERPC_DTPMOD:
4197 // Not expected. We will give an error later.
4202 // Report an unsupported relocation against a local symbol.
4204 template<int size, bool big_endian>
4206 Target_powerpc<size, big_endian>::Scan::unsupported_reloc_local(
4207 Sized_relobj_file<size, big_endian>* object,
4208 unsigned int r_type)
4210 gold_error(_("%s: unsupported reloc %u against local symbol"),
4211 object->name().c_str(), r_type);
4214 // We are about to emit a dynamic relocation of type R_TYPE. If the
4215 // dynamic linker does not support it, issue an error.
4217 template<int size, bool big_endian>
4219 Target_powerpc<size, big_endian>::Scan::check_non_pic(Relobj* object,
4220 unsigned int r_type)
4222 gold_assert(r_type != elfcpp::R_POWERPC_NONE);
4224 // These are the relocation types supported by glibc for both 32-bit
4225 // and 64-bit powerpc.
4228 case elfcpp::R_POWERPC_NONE:
4229 case elfcpp::R_POWERPC_RELATIVE:
4230 case elfcpp::R_POWERPC_GLOB_DAT:
4231 case elfcpp::R_POWERPC_DTPMOD:
4232 case elfcpp::R_POWERPC_DTPREL:
4233 case elfcpp::R_POWERPC_TPREL:
4234 case elfcpp::R_POWERPC_JMP_SLOT:
4235 case elfcpp::R_POWERPC_COPY:
4236 case elfcpp::R_POWERPC_IRELATIVE:
4237 case elfcpp::R_POWERPC_ADDR32:
4238 case elfcpp::R_POWERPC_UADDR32:
4239 case elfcpp::R_POWERPC_ADDR24:
4240 case elfcpp::R_POWERPC_ADDR16:
4241 case elfcpp::R_POWERPC_UADDR16:
4242 case elfcpp::R_POWERPC_ADDR16_LO:
4243 case elfcpp::R_POWERPC_ADDR16_HI:
4244 case elfcpp::R_POWERPC_ADDR16_HA:
4245 case elfcpp::R_POWERPC_ADDR14:
4246 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
4247 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
4248 case elfcpp::R_POWERPC_REL32:
4249 case elfcpp::R_POWERPC_REL24:
4250 case elfcpp::R_POWERPC_TPREL16:
4251 case elfcpp::R_POWERPC_TPREL16_LO:
4252 case elfcpp::R_POWERPC_TPREL16_HI:
4253 case elfcpp::R_POWERPC_TPREL16_HA:
4264 // These are the relocation types supported only on 64-bit.
4265 case elfcpp::R_PPC64_ADDR64:
4266 case elfcpp::R_PPC64_UADDR64:
4267 case elfcpp::R_PPC64_JMP_IREL:
4268 case elfcpp::R_PPC64_ADDR16_DS:
4269 case elfcpp::R_PPC64_ADDR16_LO_DS:
4270 case elfcpp::R_PPC64_ADDR16_HIGHER:
4271 case elfcpp::R_PPC64_ADDR16_HIGHEST:
4272 case elfcpp::R_PPC64_ADDR16_HIGHERA:
4273 case elfcpp::R_PPC64_ADDR16_HIGHESTA:
4274 case elfcpp::R_PPC64_REL64:
4275 case elfcpp::R_POWERPC_ADDR30:
4276 case elfcpp::R_PPC64_TPREL16_DS:
4277 case elfcpp::R_PPC64_TPREL16_LO_DS:
4278 case elfcpp::R_PPC64_TPREL16_HIGHER:
4279 case elfcpp::R_PPC64_TPREL16_HIGHEST:
4280 case elfcpp::R_PPC64_TPREL16_HIGHERA:
4281 case elfcpp::R_PPC64_TPREL16_HIGHESTA:
4292 // These are the relocation types supported only on 32-bit.
4293 // ??? glibc ld.so doesn't need to support these.
4294 case elfcpp::R_POWERPC_DTPREL16:
4295 case elfcpp::R_POWERPC_DTPREL16_LO:
4296 case elfcpp::R_POWERPC_DTPREL16_HI:
4297 case elfcpp::R_POWERPC_DTPREL16_HA:
4305 // This prevents us from issuing more than one error per reloc
4306 // section. But we can still wind up issuing more than one
4307 // error per object file.
4308 if (this->issued_non_pic_error_)
4310 gold_assert(parameters->options().output_is_position_independent());
4311 object->error(_("requires unsupported dynamic reloc; "
4312 "recompile with -fPIC"));
4313 this->issued_non_pic_error_ = true;
4317 // Return whether we need to make a PLT entry for a relocation of the
4318 // given type against a STT_GNU_IFUNC symbol.
4320 template<int size, bool big_endian>
4322 Target_powerpc<size, big_endian>::Scan::reloc_needs_plt_for_ifunc(
4323 Sized_relobj_file<size, big_endian>* object,
4324 unsigned int r_type)
4326 // In non-pic code any reference will resolve to the plt call stub
4327 // for the ifunc symbol.
4328 if (size == 32 && !parameters->options().output_is_position_independent())
4333 // Word size refs from data sections are OK.
4334 case elfcpp::R_POWERPC_ADDR32:
4335 case elfcpp::R_POWERPC_UADDR32:
4340 case elfcpp::R_PPC64_ADDR64:
4341 case elfcpp::R_PPC64_UADDR64:
4346 // GOT refs are good.
4347 case elfcpp::R_POWERPC_GOT16:
4348 case elfcpp::R_POWERPC_GOT16_LO:
4349 case elfcpp::R_POWERPC_GOT16_HI:
4350 case elfcpp::R_POWERPC_GOT16_HA:
4351 case elfcpp::R_PPC64_GOT16_DS:
4352 case elfcpp::R_PPC64_GOT16_LO_DS:
4355 // So are function calls.
4356 case elfcpp::R_POWERPC_ADDR24:
4357 case elfcpp::R_POWERPC_ADDR14:
4358 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
4359 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
4360 case elfcpp::R_POWERPC_REL24:
4361 case elfcpp::R_PPC_PLTREL24:
4362 case elfcpp::R_POWERPC_REL14:
4363 case elfcpp::R_POWERPC_REL14_BRTAKEN:
4364 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
4371 // Anything else is a problem.
4372 // If we are building a static executable, the libc startup function
4373 // responsible for applying indirect function relocations is going
4374 // to complain about the reloc type.
4375 // If we are building a dynamic executable, we will have a text
4376 // relocation. The dynamic loader will set the text segment
4377 // writable and non-executable to apply text relocations. So we'll
4378 // segfault when trying to run the indirection function to resolve
4380 gold_error(_("%s: unsupported reloc %u for IFUNC symbol"),
4381 object->name().c_str(), r_type);
4385 // Scan a relocation for a local symbol.
4387 template<int size, bool big_endian>
4389 Target_powerpc<size, big_endian>::Scan::local(
4390 Symbol_table* symtab,
4392 Target_powerpc<size, big_endian>* target,
4393 Sized_relobj_file<size, big_endian>* object,
4394 unsigned int data_shndx,
4395 Output_section* output_section,
4396 const elfcpp::Rela<size, big_endian>& reloc,
4397 unsigned int r_type,
4398 const elfcpp::Sym<size, big_endian>& lsym,
4401 Powerpc_relobj<size, big_endian>* ppc_object
4402 = static_cast<Powerpc_relobj<size, big_endian>*>(object);
4407 && data_shndx == ppc_object->opd_shndx()
4408 && r_type == elfcpp::R_PPC64_ADDR64)
4409 ppc_object->set_opd_discard(reloc.get_r_offset());
4413 // A local STT_GNU_IFUNC symbol may require a PLT entry.
4414 bool is_ifunc = lsym.get_st_type() == elfcpp::STT_GNU_IFUNC;
4415 if (is_ifunc && this->reloc_needs_plt_for_ifunc(object, r_type))
4417 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
4418 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
4419 r_type, r_sym, reloc.get_r_addend());
4420 target->make_local_ifunc_plt_entry(symtab, layout, object, r_sym);
4425 case elfcpp::R_POWERPC_NONE:
4426 case elfcpp::R_POWERPC_GNU_VTINHERIT:
4427 case elfcpp::R_POWERPC_GNU_VTENTRY:
4428 case elfcpp::R_PPC64_TOCSAVE:
4429 case elfcpp::R_PPC_EMB_MRKREF:
4430 case elfcpp::R_POWERPC_TLS:
4433 case elfcpp::R_PPC64_TOC:
4435 Output_data_got_powerpc<size, big_endian>* got
4436 = target->got_section(symtab, layout);
4437 if (parameters->options().output_is_position_independent())
4439 Address off = reloc.get_r_offset();
4441 && data_shndx == ppc_object->opd_shndx()
4442 && ppc_object->get_opd_discard(off - 8))
4445 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
4446 Powerpc_relobj<size, big_endian>* symobj = ppc_object;
4447 rela_dyn->add_output_section_relative(got->output_section(),
4448 elfcpp::R_POWERPC_RELATIVE,
4450 object, data_shndx, off,
4451 symobj->toc_base_offset());
4456 case elfcpp::R_PPC64_ADDR64:
4457 case elfcpp::R_PPC64_UADDR64:
4458 case elfcpp::R_POWERPC_ADDR32:
4459 case elfcpp::R_POWERPC_UADDR32:
4460 case elfcpp::R_POWERPC_ADDR24:
4461 case elfcpp::R_POWERPC_ADDR16:
4462 case elfcpp::R_POWERPC_ADDR16_LO:
4463 case elfcpp::R_POWERPC_ADDR16_HI:
4464 case elfcpp::R_POWERPC_ADDR16_HA:
4465 case elfcpp::R_POWERPC_UADDR16:
4466 case elfcpp::R_PPC64_ADDR16_HIGHER:
4467 case elfcpp::R_PPC64_ADDR16_HIGHERA:
4468 case elfcpp::R_PPC64_ADDR16_HIGHEST:
4469 case elfcpp::R_PPC64_ADDR16_HIGHESTA:
4470 case elfcpp::R_PPC64_ADDR16_DS:
4471 case elfcpp::R_PPC64_ADDR16_LO_DS:
4472 case elfcpp::R_POWERPC_ADDR14:
4473 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
4474 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
4475 // If building a shared library (or a position-independent
4476 // executable), we need to create a dynamic relocation for
4478 if (parameters->options().output_is_position_independent()
4479 || (size == 64 && is_ifunc))
4481 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
4483 if ((size == 32 && r_type == elfcpp::R_POWERPC_ADDR32)
4484 || (size == 64 && r_type == elfcpp::R_PPC64_ADDR64))
4486 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
4487 unsigned int dynrel = elfcpp::R_POWERPC_RELATIVE;
4490 rela_dyn = target->iplt_section()->rel_plt();
4491 dynrel = elfcpp::R_POWERPC_IRELATIVE;
4493 rela_dyn->add_local_relative(object, r_sym, dynrel,
4494 output_section, data_shndx,
4495 reloc.get_r_offset(),
4496 reloc.get_r_addend(), false);
4500 check_non_pic(object, r_type);
4501 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
4502 rela_dyn->add_local(object, r_sym, r_type, output_section,
4503 data_shndx, reloc.get_r_offset(),
4504 reloc.get_r_addend());
4509 case elfcpp::R_POWERPC_REL24:
4510 case elfcpp::R_PPC_PLTREL24:
4511 case elfcpp::R_PPC_LOCAL24PC:
4512 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
4513 r_type, elfcpp::elf_r_sym<size>(reloc.get_r_info()),
4514 reloc.get_r_addend());
4517 case elfcpp::R_POWERPC_REL14:
4518 case elfcpp::R_POWERPC_REL14_BRTAKEN:
4519 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
4520 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
4521 r_type, elfcpp::elf_r_sym<size>(reloc.get_r_info()),
4522 reloc.get_r_addend());
4525 case elfcpp::R_PPC64_REL64:
4526 case elfcpp::R_POWERPC_REL32:
4527 case elfcpp::R_POWERPC_REL16:
4528 case elfcpp::R_POWERPC_REL16_LO:
4529 case elfcpp::R_POWERPC_REL16_HI:
4530 case elfcpp::R_POWERPC_REL16_HA:
4531 case elfcpp::R_POWERPC_SECTOFF:
4532 case elfcpp::R_POWERPC_TPREL16:
4533 case elfcpp::R_POWERPC_DTPREL16:
4534 case elfcpp::R_POWERPC_SECTOFF_LO:
4535 case elfcpp::R_POWERPC_TPREL16_LO:
4536 case elfcpp::R_POWERPC_DTPREL16_LO:
4537 case elfcpp::R_POWERPC_SECTOFF_HI:
4538 case elfcpp::R_POWERPC_TPREL16_HI:
4539 case elfcpp::R_POWERPC_DTPREL16_HI:
4540 case elfcpp::R_POWERPC_SECTOFF_HA:
4541 case elfcpp::R_POWERPC_TPREL16_HA:
4542 case elfcpp::R_POWERPC_DTPREL16_HA:
4543 case elfcpp::R_PPC64_DTPREL16_HIGHER:
4544 case elfcpp::R_PPC64_TPREL16_HIGHER:
4545 case elfcpp::R_PPC64_DTPREL16_HIGHERA:
4546 case elfcpp::R_PPC64_TPREL16_HIGHERA:
4547 case elfcpp::R_PPC64_DTPREL16_HIGHEST:
4548 case elfcpp::R_PPC64_TPREL16_HIGHEST:
4549 case elfcpp::R_PPC64_DTPREL16_HIGHESTA:
4550 case elfcpp::R_PPC64_TPREL16_HIGHESTA:
4551 case elfcpp::R_PPC64_TPREL16_DS:
4552 case elfcpp::R_PPC64_TPREL16_LO_DS:
4553 case elfcpp::R_PPC64_DTPREL16_DS:
4554 case elfcpp::R_PPC64_DTPREL16_LO_DS:
4555 case elfcpp::R_PPC64_SECTOFF_DS:
4556 case elfcpp::R_PPC64_SECTOFF_LO_DS:
4557 case elfcpp::R_PPC64_TLSGD:
4558 case elfcpp::R_PPC64_TLSLD:
4561 case elfcpp::R_POWERPC_GOT16:
4562 case elfcpp::R_POWERPC_GOT16_LO:
4563 case elfcpp::R_POWERPC_GOT16_HI:
4564 case elfcpp::R_POWERPC_GOT16_HA:
4565 case elfcpp::R_PPC64_GOT16_DS:
4566 case elfcpp::R_PPC64_GOT16_LO_DS:
4568 // The symbol requires a GOT entry.
4569 Output_data_got_powerpc<size, big_endian>* got
4570 = target->got_section(symtab, layout);
4571 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
4573 if (!parameters->options().output_is_position_independent())
4575 if (size == 32 && is_ifunc)
4576 got->add_local_plt(object, r_sym, GOT_TYPE_STANDARD);
4578 got->add_local(object, r_sym, GOT_TYPE_STANDARD);
4580 else if (!object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD))
4582 // If we are generating a shared object or a pie, this
4583 // symbol's GOT entry will be set by a dynamic relocation.
4585 off = got->add_constant(0);
4586 object->set_local_got_offset(r_sym, GOT_TYPE_STANDARD, off);
4588 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
4589 unsigned int dynrel = elfcpp::R_POWERPC_RELATIVE;
4592 rela_dyn = target->iplt_section()->rel_plt();
4593 dynrel = elfcpp::R_POWERPC_IRELATIVE;
4595 rela_dyn->add_local_relative(object, r_sym, dynrel,
4596 got, off, 0, false);
4601 case elfcpp::R_PPC64_TOC16:
4602 case elfcpp::R_PPC64_TOC16_LO:
4603 case elfcpp::R_PPC64_TOC16_HI:
4604 case elfcpp::R_PPC64_TOC16_HA:
4605 case elfcpp::R_PPC64_TOC16_DS:
4606 case elfcpp::R_PPC64_TOC16_LO_DS:
4607 // We need a GOT section.
4608 target->got_section(symtab, layout);
4611 case elfcpp::R_POWERPC_GOT_TLSGD16:
4612 case elfcpp::R_POWERPC_GOT_TLSGD16_LO:
4613 case elfcpp::R_POWERPC_GOT_TLSGD16_HI:
4614 case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
4616 const tls::Tls_optimization tls_type = target->optimize_tls_gd(true);
4617 if (tls_type == tls::TLSOPT_NONE)
4619 Output_data_got_powerpc<size, big_endian>* got
4620 = target->got_section(symtab, layout);
4621 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
4622 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
4623 got->add_local_tls_pair(object, r_sym, GOT_TYPE_TLSGD,
4624 rela_dyn, elfcpp::R_POWERPC_DTPMOD);
4626 else if (tls_type == tls::TLSOPT_TO_LE)
4628 // no GOT relocs needed for Local Exec.
4635 case elfcpp::R_POWERPC_GOT_TLSLD16:
4636 case elfcpp::R_POWERPC_GOT_TLSLD16_LO:
4637 case elfcpp::R_POWERPC_GOT_TLSLD16_HI:
4638 case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
4640 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
4641 if (tls_type == tls::TLSOPT_NONE)
4642 target->tlsld_got_offset(symtab, layout, object);
4643 else if (tls_type == tls::TLSOPT_TO_LE)
4645 // no GOT relocs needed for Local Exec.
4646 if (parameters->options().emit_relocs())
4648 Output_section* os = layout->tls_segment()->first_section();
4649 gold_assert(os != NULL);
4650 os->set_needs_symtab_index();
4658 case elfcpp::R_POWERPC_GOT_DTPREL16:
4659 case elfcpp::R_POWERPC_GOT_DTPREL16_LO:
4660 case elfcpp::R_POWERPC_GOT_DTPREL16_HI:
4661 case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
4663 Output_data_got_powerpc<size, big_endian>* got
4664 = target->got_section(symtab, layout);
4665 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
4666 got->add_local_tls(object, r_sym, GOT_TYPE_DTPREL);
4670 case elfcpp::R_POWERPC_GOT_TPREL16:
4671 case elfcpp::R_POWERPC_GOT_TPREL16_LO:
4672 case elfcpp::R_POWERPC_GOT_TPREL16_HI:
4673 case elfcpp::R_POWERPC_GOT_TPREL16_HA:
4675 const tls::Tls_optimization tls_type = target->optimize_tls_ie(true);
4676 if (tls_type == tls::TLSOPT_NONE)
4678 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
4679 if (!object->local_has_got_offset(r_sym, GOT_TYPE_TPREL))
4681 Output_data_got_powerpc<size, big_endian>* got
4682 = target->got_section(symtab, layout);
4683 unsigned int off = got->add_constant(0);
4684 object->set_local_got_offset(r_sym, GOT_TYPE_TPREL, off);
4686 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
4687 rela_dyn->add_symbolless_local_addend(object, r_sym,
4688 elfcpp::R_POWERPC_TPREL,
4692 else if (tls_type == tls::TLSOPT_TO_LE)
4694 // no GOT relocs needed for Local Exec.
4702 unsupported_reloc_local(object, r_type);
4708 case elfcpp::R_POWERPC_GOT_TLSLD16:
4709 case elfcpp::R_POWERPC_GOT_TLSGD16:
4710 case elfcpp::R_POWERPC_GOT_TPREL16:
4711 case elfcpp::R_POWERPC_GOT_DTPREL16:
4712 case elfcpp::R_POWERPC_GOT16:
4713 case elfcpp::R_PPC64_GOT16_DS:
4714 case elfcpp::R_PPC64_TOC16:
4715 case elfcpp::R_PPC64_TOC16_DS:
4716 ppc_object->set_has_small_toc_reloc();
4722 // Report an unsupported relocation against a global symbol.
4724 template<int size, bool big_endian>
4726 Target_powerpc<size, big_endian>::Scan::unsupported_reloc_global(
4727 Sized_relobj_file<size, big_endian>* object,
4728 unsigned int r_type,
4731 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
4732 object->name().c_str(), r_type, gsym->demangled_name().c_str());
4735 // Scan a relocation for a global symbol.
4737 template<int size, bool big_endian>
4739 Target_powerpc<size, big_endian>::Scan::global(
4740 Symbol_table* symtab,
4742 Target_powerpc<size, big_endian>* target,
4743 Sized_relobj_file<size, big_endian>* object,
4744 unsigned int data_shndx,
4745 Output_section* output_section,
4746 const elfcpp::Rela<size, big_endian>& reloc,
4747 unsigned int r_type,
4750 Powerpc_relobj<size, big_endian>* ppc_object
4751 = static_cast<Powerpc_relobj<size, big_endian>*>(object);
4753 // A STT_GNU_IFUNC symbol may require a PLT entry.
4754 if (gsym->type() == elfcpp::STT_GNU_IFUNC
4755 && this->reloc_needs_plt_for_ifunc(object, r_type))
4757 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
4758 r_type, elfcpp::elf_r_sym<size>(reloc.get_r_info()),
4759 reloc.get_r_addend());
4760 target->make_plt_entry(symtab, layout, gsym);
4765 case elfcpp::R_POWERPC_NONE:
4766 case elfcpp::R_POWERPC_GNU_VTINHERIT:
4767 case elfcpp::R_POWERPC_GNU_VTENTRY:
4768 case elfcpp::R_PPC_LOCAL24PC:
4769 case elfcpp::R_PPC_EMB_MRKREF:
4770 case elfcpp::R_POWERPC_TLS:
4773 case elfcpp::R_PPC64_TOC:
4775 Output_data_got_powerpc<size, big_endian>* got
4776 = target->got_section(symtab, layout);
4777 if (parameters->options().output_is_position_independent())
4779 Address off = reloc.get_r_offset();
4781 && data_shndx == ppc_object->opd_shndx()
4782 && ppc_object->get_opd_discard(off - 8))
4785 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
4786 Powerpc_relobj<size, big_endian>* symobj = ppc_object;
4787 if (data_shndx != ppc_object->opd_shndx())
4788 symobj = static_cast
4789 <Powerpc_relobj<size, big_endian>*>(gsym->object());
4790 rela_dyn->add_output_section_relative(got->output_section(),
4791 elfcpp::R_POWERPC_RELATIVE,
4793 object, data_shndx, off,
4794 symobj->toc_base_offset());
4799 case elfcpp::R_PPC64_ADDR64:
4801 && data_shndx == ppc_object->opd_shndx()
4802 && (gsym->is_defined_in_discarded_section()
4803 || gsym->object() != object))
4805 ppc_object->set_opd_discard(reloc.get_r_offset());
4809 case elfcpp::R_PPC64_UADDR64:
4810 case elfcpp::R_POWERPC_ADDR32:
4811 case elfcpp::R_POWERPC_UADDR32:
4812 case elfcpp::R_POWERPC_ADDR24:
4813 case elfcpp::R_POWERPC_ADDR16:
4814 case elfcpp::R_POWERPC_ADDR16_LO:
4815 case elfcpp::R_POWERPC_ADDR16_HI:
4816 case elfcpp::R_POWERPC_ADDR16_HA:
4817 case elfcpp::R_POWERPC_UADDR16:
4818 case elfcpp::R_PPC64_ADDR16_HIGHER:
4819 case elfcpp::R_PPC64_ADDR16_HIGHERA:
4820 case elfcpp::R_PPC64_ADDR16_HIGHEST:
4821 case elfcpp::R_PPC64_ADDR16_HIGHESTA:
4822 case elfcpp::R_PPC64_ADDR16_DS:
4823 case elfcpp::R_PPC64_ADDR16_LO_DS:
4824 case elfcpp::R_POWERPC_ADDR14:
4825 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
4826 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
4828 // Make a PLT entry if necessary.
4829 if (gsym->needs_plt_entry())
4831 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
4833 elfcpp::elf_r_sym<size>(reloc.get_r_info()),
4834 reloc.get_r_addend());
4835 target->make_plt_entry(symtab, layout, gsym);
4836 // Since this is not a PC-relative relocation, we may be
4837 // taking the address of a function. In that case we need to
4838 // set the entry in the dynamic symbol table to the address of
4839 // the PLT call stub.
4841 && gsym->is_from_dynobj()
4842 && !parameters->options().output_is_position_independent())
4843 gsym->set_needs_dynsym_value();
4845 // Make a dynamic relocation if necessary.
4846 if (needs_dynamic_reloc<size>(gsym, Scan::get_reference_flags(r_type))
4847 || (size == 64 && gsym->type() == elfcpp::STT_GNU_IFUNC))
4849 if (gsym->may_need_copy_reloc())
4851 target->copy_reloc(symtab, layout, object,
4852 data_shndx, output_section, gsym, reloc);
4854 else if ((size == 32
4855 && r_type == elfcpp::R_POWERPC_ADDR32
4856 && gsym->can_use_relative_reloc(false)
4857 && !(gsym->visibility() == elfcpp::STV_PROTECTED
4858 && parameters->options().shared()))
4860 && r_type == elfcpp::R_PPC64_ADDR64
4861 && (gsym->can_use_relative_reloc(false)
4862 || data_shndx == ppc_object->opd_shndx())))
4864 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
4865 unsigned int dynrel = elfcpp::R_POWERPC_RELATIVE;
4866 if (gsym->type() == elfcpp::STT_GNU_IFUNC)
4868 rela_dyn = target->iplt_section()->rel_plt();
4869 dynrel = elfcpp::R_POWERPC_IRELATIVE;
4871 rela_dyn->add_symbolless_global_addend(
4872 gsym, dynrel, output_section, object, data_shndx,
4873 reloc.get_r_offset(), reloc.get_r_addend());
4877 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
4878 check_non_pic(object, r_type);
4879 rela_dyn->add_global(gsym, r_type, output_section,
4881 reloc.get_r_offset(),
4882 reloc.get_r_addend());
4888 case elfcpp::R_PPC_PLTREL24:
4889 case elfcpp::R_POWERPC_REL24:
4890 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
4891 r_type, elfcpp::elf_r_sym<size>(reloc.get_r_info()),
4892 reloc.get_r_addend());
4893 if (gsym->needs_plt_entry()
4894 || (!gsym->final_value_is_known()
4895 && (gsym->is_undefined()
4896 || gsym->is_from_dynobj()
4897 || gsym->is_preemptible())))
4898 target->make_plt_entry(symtab, layout, gsym);
4901 case elfcpp::R_PPC64_REL64:
4902 case elfcpp::R_POWERPC_REL32:
4903 // Make a dynamic relocation if necessary.
4904 if (needs_dynamic_reloc<size>(gsym, Scan::get_reference_flags(r_type)))
4906 if (gsym->may_need_copy_reloc())
4908 target->copy_reloc(symtab, layout, object,
4909 data_shndx, output_section, gsym,
4914 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
4915 check_non_pic(object, r_type);
4916 rela_dyn->add_global(gsym, r_type, output_section, object,
4917 data_shndx, reloc.get_r_offset(),
4918 reloc.get_r_addend());
4923 case elfcpp::R_POWERPC_REL14:
4924 case elfcpp::R_POWERPC_REL14_BRTAKEN:
4925 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
4926 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
4927 r_type, elfcpp::elf_r_sym<size>(reloc.get_r_info()),
4928 reloc.get_r_addend());
4931 case elfcpp::R_POWERPC_REL16:
4932 case elfcpp::R_POWERPC_REL16_LO:
4933 case elfcpp::R_POWERPC_REL16_HI:
4934 case elfcpp::R_POWERPC_REL16_HA:
4935 case elfcpp::R_POWERPC_SECTOFF:
4936 case elfcpp::R_POWERPC_TPREL16:
4937 case elfcpp::R_POWERPC_DTPREL16:
4938 case elfcpp::R_POWERPC_SECTOFF_LO:
4939 case elfcpp::R_POWERPC_TPREL16_LO:
4940 case elfcpp::R_POWERPC_DTPREL16_LO:
4941 case elfcpp::R_POWERPC_SECTOFF_HI:
4942 case elfcpp::R_POWERPC_TPREL16_HI:
4943 case elfcpp::R_POWERPC_DTPREL16_HI:
4944 case elfcpp::R_POWERPC_SECTOFF_HA:
4945 case elfcpp::R_POWERPC_TPREL16_HA:
4946 case elfcpp::R_POWERPC_DTPREL16_HA:
4947 case elfcpp::R_PPC64_DTPREL16_HIGHER:
4948 case elfcpp::R_PPC64_TPREL16_HIGHER:
4949 case elfcpp::R_PPC64_DTPREL16_HIGHERA:
4950 case elfcpp::R_PPC64_TPREL16_HIGHERA:
4951 case elfcpp::R_PPC64_DTPREL16_HIGHEST:
4952 case elfcpp::R_PPC64_TPREL16_HIGHEST:
4953 case elfcpp::R_PPC64_DTPREL16_HIGHESTA:
4954 case elfcpp::R_PPC64_TPREL16_HIGHESTA:
4955 case elfcpp::R_PPC64_TPREL16_DS:
4956 case elfcpp::R_PPC64_TPREL16_LO_DS:
4957 case elfcpp::R_PPC64_DTPREL16_DS:
4958 case elfcpp::R_PPC64_DTPREL16_LO_DS:
4959 case elfcpp::R_PPC64_SECTOFF_DS:
4960 case elfcpp::R_PPC64_SECTOFF_LO_DS:
4961 case elfcpp::R_PPC64_TLSGD:
4962 case elfcpp::R_PPC64_TLSLD:
4965 case elfcpp::R_POWERPC_GOT16:
4966 case elfcpp::R_POWERPC_GOT16_LO:
4967 case elfcpp::R_POWERPC_GOT16_HI:
4968 case elfcpp::R_POWERPC_GOT16_HA:
4969 case elfcpp::R_PPC64_GOT16_DS:
4970 case elfcpp::R_PPC64_GOT16_LO_DS:
4972 // The symbol requires a GOT entry.
4973 Output_data_got_powerpc<size, big_endian>* got;
4975 got = target->got_section(symtab, layout);
4976 if (gsym->final_value_is_known())
4978 if (size == 32 && gsym->type() == elfcpp::STT_GNU_IFUNC)
4979 got->add_global_plt(gsym, GOT_TYPE_STANDARD);
4981 got->add_global(gsym, GOT_TYPE_STANDARD);
4983 else if (!gsym->has_got_offset(GOT_TYPE_STANDARD))
4985 // If we are generating a shared object or a pie, this
4986 // symbol's GOT entry will be set by a dynamic relocation.
4987 unsigned int off = got->add_constant(0);
4988 gsym->set_got_offset(GOT_TYPE_STANDARD, off);
4990 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
4991 if (gsym->can_use_relative_reloc(false)
4993 && gsym->visibility() == elfcpp::STV_PROTECTED
4994 && parameters->options().shared()))
4996 unsigned int dynrel = elfcpp::R_POWERPC_RELATIVE;
4997 if (gsym->type() == elfcpp::STT_GNU_IFUNC)
4999 rela_dyn = target->iplt_section()->rel_plt();
5000 dynrel = elfcpp::R_POWERPC_IRELATIVE;
5002 rela_dyn->add_global_relative(gsym, dynrel, got, off, 0, false);
5006 unsigned int dynrel = elfcpp::R_POWERPC_GLOB_DAT;
5007 rela_dyn->add_global(gsym, dynrel, got, off, 0);
5013 case elfcpp::R_PPC64_TOC16:
5014 case elfcpp::R_PPC64_TOC16_LO:
5015 case elfcpp::R_PPC64_TOC16_HI:
5016 case elfcpp::R_PPC64_TOC16_HA:
5017 case elfcpp::R_PPC64_TOC16_DS:
5018 case elfcpp::R_PPC64_TOC16_LO_DS:
5019 // We need a GOT section.
5020 target->got_section(symtab, layout);
5023 case elfcpp::R_POWERPC_GOT_TLSGD16:
5024 case elfcpp::R_POWERPC_GOT_TLSGD16_LO:
5025 case elfcpp::R_POWERPC_GOT_TLSGD16_HI:
5026 case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
5028 const bool final = gsym->final_value_is_known();
5029 const tls::Tls_optimization tls_type = target->optimize_tls_gd(final);
5030 if (tls_type == tls::TLSOPT_NONE)
5032 Output_data_got_powerpc<size, big_endian>* got
5033 = target->got_section(symtab, layout);
5034 got->add_global_pair_with_rel(gsym, GOT_TYPE_TLSGD,
5035 target->rela_dyn_section(layout),
5036 elfcpp::R_POWERPC_DTPMOD,
5037 elfcpp::R_POWERPC_DTPREL);
5039 else if (tls_type == tls::TLSOPT_TO_IE)
5041 if (!gsym->has_got_offset(GOT_TYPE_TPREL))
5043 Output_data_got_powerpc<size, big_endian>* got
5044 = target->got_section(symtab, layout);
5045 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
5046 if (gsym->is_undefined()
5047 || gsym->is_from_dynobj())
5049 got->add_global_with_rel(gsym, GOT_TYPE_TPREL, rela_dyn,
5050 elfcpp::R_POWERPC_TPREL);
5054 unsigned int off = got->add_constant(0);
5055 gsym->set_got_offset(GOT_TYPE_TPREL, off);
5056 unsigned int dynrel = elfcpp::R_POWERPC_TPREL;
5057 rela_dyn->add_symbolless_global_addend(gsym, dynrel,
5062 else if (tls_type == tls::TLSOPT_TO_LE)
5064 // no GOT relocs needed for Local Exec.
5071 case elfcpp::R_POWERPC_GOT_TLSLD16:
5072 case elfcpp::R_POWERPC_GOT_TLSLD16_LO:
5073 case elfcpp::R_POWERPC_GOT_TLSLD16_HI:
5074 case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
5076 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
5077 if (tls_type == tls::TLSOPT_NONE)
5078 target->tlsld_got_offset(symtab, layout, object);
5079 else if (tls_type == tls::TLSOPT_TO_LE)
5081 // no GOT relocs needed for Local Exec.
5082 if (parameters->options().emit_relocs())
5084 Output_section* os = layout->tls_segment()->first_section();
5085 gold_assert(os != NULL);
5086 os->set_needs_symtab_index();
5094 case elfcpp::R_POWERPC_GOT_DTPREL16:
5095 case elfcpp::R_POWERPC_GOT_DTPREL16_LO:
5096 case elfcpp::R_POWERPC_GOT_DTPREL16_HI:
5097 case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
5099 Output_data_got_powerpc<size, big_endian>* got
5100 = target->got_section(symtab, layout);
5101 if (!gsym->final_value_is_known()
5102 && (gsym->is_from_dynobj()
5103 || gsym->is_undefined()
5104 || gsym->is_preemptible()))
5105 got->add_global_with_rel(gsym, GOT_TYPE_DTPREL,
5106 target->rela_dyn_section(layout),
5107 elfcpp::R_POWERPC_DTPREL);
5109 got->add_global_tls(gsym, GOT_TYPE_DTPREL);
5113 case elfcpp::R_POWERPC_GOT_TPREL16:
5114 case elfcpp::R_POWERPC_GOT_TPREL16_LO:
5115 case elfcpp::R_POWERPC_GOT_TPREL16_HI:
5116 case elfcpp::R_POWERPC_GOT_TPREL16_HA:
5118 const bool final = gsym->final_value_is_known();
5119 const tls::Tls_optimization tls_type = target->optimize_tls_ie(final);
5120 if (tls_type == tls::TLSOPT_NONE)
5122 if (!gsym->has_got_offset(GOT_TYPE_TPREL))
5124 Output_data_got_powerpc<size, big_endian>* got
5125 = target->got_section(symtab, layout);
5126 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
5127 if (gsym->is_undefined()
5128 || gsym->is_from_dynobj())
5130 got->add_global_with_rel(gsym, GOT_TYPE_TPREL, rela_dyn,
5131 elfcpp::R_POWERPC_TPREL);
5135 unsigned int off = got->add_constant(0);
5136 gsym->set_got_offset(GOT_TYPE_TPREL, off);
5137 unsigned int dynrel = elfcpp::R_POWERPC_TPREL;
5138 rela_dyn->add_symbolless_global_addend(gsym, dynrel,
5143 else if (tls_type == tls::TLSOPT_TO_LE)
5145 // no GOT relocs needed for Local Exec.
5153 unsupported_reloc_global(object, r_type, gsym);
5159 case elfcpp::R_POWERPC_GOT_TLSLD16:
5160 case elfcpp::R_POWERPC_GOT_TLSGD16:
5161 case elfcpp::R_POWERPC_GOT_TPREL16:
5162 case elfcpp::R_POWERPC_GOT_DTPREL16:
5163 case elfcpp::R_POWERPC_GOT16:
5164 case elfcpp::R_PPC64_GOT16_DS:
5165 case elfcpp::R_PPC64_TOC16:
5166 case elfcpp::R_PPC64_TOC16_DS:
5167 ppc_object->set_has_small_toc_reloc();
5173 // Process relocations for gc.
5175 template<int size, bool big_endian>
5177 Target_powerpc<size, big_endian>::gc_process_relocs(
5178 Symbol_table* symtab,
5180 Sized_relobj_file<size, big_endian>* object,
5181 unsigned int data_shndx,
5183 const unsigned char* prelocs,
5185 Output_section* output_section,
5186 bool needs_special_offset_handling,
5187 size_t local_symbol_count,
5188 const unsigned char* plocal_symbols)
5190 typedef Target_powerpc<size, big_endian> Powerpc;
5191 typedef typename Target_powerpc<size, big_endian>::Scan Scan;
5192 Powerpc_relobj<size, big_endian>* ppc_object
5193 = static_cast<Powerpc_relobj<size, big_endian>*>(object);
5195 ppc_object->set_opd_valid();
5196 if (size == 64 && data_shndx == ppc_object->opd_shndx())
5198 typename Powerpc_relobj<size, big_endian>::Access_from::iterator p;
5199 for (p = ppc_object->access_from_map()->begin();
5200 p != ppc_object->access_from_map()->end();
5203 Address dst_off = p->first;
5204 unsigned int dst_indx = ppc_object->get_opd_ent(dst_off);
5205 typename Powerpc_relobj<size, big_endian>::Section_refs::iterator s;
5206 for (s = p->second.begin(); s != p->second.end(); ++s)
5208 Object* src_obj = s->first;
5209 unsigned int src_indx = s->second;
5210 symtab->gc()->add_reference(src_obj, src_indx,
5211 ppc_object, dst_indx);
5215 ppc_object->access_from_map()->clear();
5216 ppc_object->process_gc_mark(symtab);
5217 // Don't look at .opd relocs as .opd will reference everything.
5221 gold::gc_process_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan,
5222 typename Target_powerpc::Relocatable_size_for_reloc>(
5231 needs_special_offset_handling,
5236 // Handle target specific gc actions when adding a gc reference from
5237 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
5238 // and DST_OFF. For powerpc64, this adds a referenc to the code
5239 // section of a function descriptor.
5241 template<int size, bool big_endian>
5243 Target_powerpc<size, big_endian>::do_gc_add_reference(
5244 Symbol_table* symtab,
5246 unsigned int src_shndx,
5248 unsigned int dst_shndx,
5249 Address dst_off) const
5251 Powerpc_relobj<size, big_endian>* ppc_object
5252 = static_cast<Powerpc_relobj<size, big_endian>*>(dst_obj);
5254 && !ppc_object->is_dynamic()
5255 && dst_shndx == ppc_object->opd_shndx())
5257 if (ppc_object->opd_valid())
5259 dst_shndx = ppc_object->get_opd_ent(dst_off);
5260 symtab->gc()->add_reference(src_obj, src_shndx, dst_obj, dst_shndx);
5264 // If we haven't run scan_opd_relocs, we must delay
5265 // processing this function descriptor reference.
5266 ppc_object->add_reference(src_obj, src_shndx, dst_off);
5271 // Add any special sections for this symbol to the gc work list.
5272 // For powerpc64, this adds the code section of a function
5275 template<int size, bool big_endian>
5277 Target_powerpc<size, big_endian>::do_gc_mark_symbol(
5278 Symbol_table* symtab,
5283 Powerpc_relobj<size, big_endian>* ppc_object
5284 = static_cast<Powerpc_relobj<size, big_endian>*>(sym->object());
5286 unsigned int shndx = sym->shndx(&is_ordinary);
5287 if (is_ordinary && shndx == ppc_object->opd_shndx())
5289 Sized_symbol<size>* gsym = symtab->get_sized_symbol<size>(sym);
5290 Address dst_off = gsym->value();
5291 if (ppc_object->opd_valid())
5293 unsigned int dst_indx = ppc_object->get_opd_ent(dst_off);
5294 symtab->gc()->worklist().push(Section_id(ppc_object, dst_indx));
5297 ppc_object->add_gc_mark(dst_off);
5302 // Scan relocations for a section.
5304 template<int size, bool big_endian>
5306 Target_powerpc<size, big_endian>::scan_relocs(
5307 Symbol_table* symtab,
5309 Sized_relobj_file<size, big_endian>* object,
5310 unsigned int data_shndx,
5311 unsigned int sh_type,
5312 const unsigned char* prelocs,
5314 Output_section* output_section,
5315 bool needs_special_offset_handling,
5316 size_t local_symbol_count,
5317 const unsigned char* plocal_symbols)
5319 typedef Target_powerpc<size, big_endian> Powerpc;
5320 typedef typename Target_powerpc<size, big_endian>::Scan Scan;
5322 if (sh_type == elfcpp::SHT_REL)
5324 gold_error(_("%s: unsupported REL reloc section"),
5325 object->name().c_str());
5329 gold::scan_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan>(
5338 needs_special_offset_handling,
5343 // Functor class for processing the global symbol table.
5344 // Removes symbols defined on discarded opd entries.
5346 template<bool big_endian>
5347 class Global_symbol_visitor_opd
5350 Global_symbol_visitor_opd()
5354 operator()(Sized_symbol<64>* sym)
5356 if (sym->has_symtab_index()
5357 || sym->source() != Symbol::FROM_OBJECT
5358 || !sym->in_real_elf())
5361 Powerpc_relobj<64, big_endian>* symobj
5362 = static_cast<Powerpc_relobj<64, big_endian>*>(sym->object());
5363 if (symobj->is_dynamic()
5364 || symobj->opd_shndx() == 0)
5368 unsigned int shndx = sym->shndx(&is_ordinary);
5369 if (shndx == symobj->opd_shndx()
5370 && symobj->get_opd_discard(sym->value()))
5371 sym->set_symtab_index(-1U);
5375 template<int size, bool big_endian>
5377 Target_powerpc<size, big_endian>::define_save_restore_funcs(
5379 Symbol_table* symtab)
5383 Output_data_save_res<64, big_endian>* savres
5384 = new Output_data_save_res<64, big_endian>(symtab);
5385 layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS,
5386 elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR,
5387 savres, ORDER_TEXT, false);
5391 // Sort linker created .got section first (for the header), then input
5392 // sections belonging to files using small model code.
5394 template<bool big_endian>
5395 class Sort_toc_sections
5399 operator()(const Output_section::Input_section& is1,
5400 const Output_section::Input_section& is2) const
5402 if (!is1.is_input_section() && is2.is_input_section())
5405 = (is1.is_input_section()
5406 && (static_cast<const Powerpc_relobj<64, big_endian>*>(is1.relobj())
5407 ->has_small_toc_reloc()));
5409 = (is2.is_input_section()
5410 && (static_cast<const Powerpc_relobj<64, big_endian>*>(is2.relobj())
5411 ->has_small_toc_reloc()));
5412 return small1 && !small2;
5416 // Finalize the sections.
5418 template<int size, bool big_endian>
5420 Target_powerpc<size, big_endian>::do_finalize_sections(
5422 const Input_objects*,
5423 Symbol_table* symtab)
5425 if (parameters->doing_static_link())
5427 // At least some versions of glibc elf-init.o have a strong
5428 // reference to __rela_iplt marker syms. A weak ref would be
5430 if (this->iplt_ != NULL)
5432 Reloc_section* rel = this->iplt_->rel_plt();
5433 symtab->define_in_output_data("__rela_iplt_start", NULL,
5434 Symbol_table::PREDEFINED, rel, 0, 0,
5435 elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
5436 elfcpp::STV_HIDDEN, 0, false, true);
5437 symtab->define_in_output_data("__rela_iplt_end", NULL,
5438 Symbol_table::PREDEFINED, rel, 0, 0,
5439 elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
5440 elfcpp::STV_HIDDEN, 0, true, true);
5444 symtab->define_as_constant("__rela_iplt_start", NULL,
5445 Symbol_table::PREDEFINED, 0, 0,
5446 elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
5447 elfcpp::STV_HIDDEN, 0, true, false);
5448 symtab->define_as_constant("__rela_iplt_end", NULL,
5449 Symbol_table::PREDEFINED, 0, 0,
5450 elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
5451 elfcpp::STV_HIDDEN, 0, true, false);
5457 typedef Global_symbol_visitor_opd<big_endian> Symbol_visitor;
5458 symtab->for_all_symbols<64, Symbol_visitor>(Symbol_visitor());
5460 if (!parameters->options().relocatable())
5462 this->define_save_restore_funcs(layout, symtab);
5464 // Annoyingly, we need to make these sections now whether or
5465 // not we need them. If we delay until do_relax then we
5466 // need to mess with the relaxation machinery checkpointing.
5467 this->got_section(symtab, layout);
5468 this->make_brlt_section(layout);
5470 if (parameters->options().toc_sort())
5472 Output_section* os = this->got_->output_section();
5473 if (os != NULL && os->input_sections().size() > 1)
5474 std::stable_sort(os->input_sections().begin(),
5475 os->input_sections().end(),
5476 Sort_toc_sections<big_endian>());
5481 // Fill in some more dynamic tags.
5482 Output_data_dynamic* odyn = layout->dynamic_data();
5485 const Reloc_section* rel_plt = (this->plt_ == NULL
5487 : this->plt_->rel_plt());
5488 layout->add_target_dynamic_tags(false, this->plt_, rel_plt,
5489 this->rela_dyn_, true, size == 32);
5493 if (this->got_ != NULL)
5495 this->got_->finalize_data_size();
5496 odyn->add_section_plus_offset(elfcpp::DT_PPC_GOT,
5497 this->got_, this->got_->g_o_t());
5502 if (this->glink_ != NULL)
5504 this->glink_->finalize_data_size();
5505 odyn->add_section_plus_offset(elfcpp::DT_PPC64_GLINK,
5507 (this->glink_->pltresolve_size
5513 // Emit any relocs we saved in an attempt to avoid generating COPY
5515 if (this->copy_relocs_.any_saved_relocs())
5516 this->copy_relocs_.emit(this->rela_dyn_section(layout));
5519 // Return TRUE iff INSN is one we expect on a _LO variety toc/got
5523 ok_lo_toc_insn(uint32_t insn)
5525 return ((insn & (0x3f << 26)) == 14u << 26 /* addi */
5526 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
5527 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
5528 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
5529 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
5530 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
5531 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
5532 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
5533 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
5534 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
5535 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
5536 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
5537 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
5538 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
5539 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
5541 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
5542 && ((insn & 3) == 0 || (insn & 3) == 3))
5543 || (insn & (0x3f << 26)) == 12u << 26 /* addic */);
5546 // Return the value to use for a branch relocation.
5548 template<int size, bool big_endian>
5549 typename elfcpp::Elf_types<size>::Elf_Addr
5550 Target_powerpc<size, big_endian>::symval_for_branch(
5552 const Sized_symbol<size>* gsym,
5553 Powerpc_relobj<size, big_endian>* object,
5554 unsigned int *dest_shndx)
5560 // If the symbol is defined in an opd section, ie. is a function
5561 // descriptor, use the function descriptor code entry address
5562 Powerpc_relobj<size, big_endian>* symobj = object;
5564 && gsym->source() != Symbol::FROM_OBJECT)
5567 symobj = static_cast<Powerpc_relobj<size, big_endian>*>(gsym->object());
5568 unsigned int shndx = symobj->opd_shndx();
5571 Address opd_addr = symobj->get_output_section_offset(shndx);
5572 gold_assert(opd_addr != invalid_address);
5573 opd_addr += symobj->output_section(shndx)->address();
5574 if (value >= opd_addr && value < opd_addr + symobj->section_size(shndx))
5577 *dest_shndx = symobj->get_opd_ent(value - opd_addr, &sec_off);
5578 Address sec_addr = symobj->get_output_section_offset(*dest_shndx);
5579 gold_assert(sec_addr != invalid_address);
5580 sec_addr += symobj->output_section(*dest_shndx)->address();
5581 value = sec_addr + sec_off;
5586 // Perform a relocation.
5588 template<int size, bool big_endian>
5590 Target_powerpc<size, big_endian>::Relocate::relocate(
5591 const Relocate_info<size, big_endian>* relinfo,
5592 Target_powerpc* target,
5595 const elfcpp::Rela<size, big_endian>& rela,
5596 unsigned int r_type,
5597 const Sized_symbol<size>* gsym,
5598 const Symbol_value<size>* psymval,
5599 unsigned char* view,
5601 section_size_type view_size)
5603 bool is_tls_call = ((r_type == elfcpp::R_POWERPC_REL24
5604 || r_type == elfcpp::R_PPC_PLTREL24)
5606 && strcmp(gsym->name(), "__tls_get_addr") == 0);
5607 enum skip_tls last_tls = this->call_tls_get_addr_;
5608 this->call_tls_get_addr_ = CALL_NOT_EXPECTED;
5611 if (last_tls == CALL_NOT_EXPECTED)
5612 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
5613 _("__tls_get_addr call lacks marker reloc"));
5614 else if (last_tls == CALL_SKIP)
5617 else if (last_tls != CALL_NOT_EXPECTED)
5618 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
5619 _("missing expected __tls_get_addr call"));
5621 typedef Powerpc_relocate_functions<size, big_endian> Reloc;
5622 typedef typename elfcpp::Swap<32, big_endian>::Valtype Insn;
5623 Powerpc_relobj<size, big_endian>* const object
5624 = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object);
5626 bool has_plt_value = false;
5627 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
5629 ? use_plt_offset<size>(gsym, Scan::get_reference_flags(r_type))
5630 : object->local_has_plt_offset(r_sym))
5632 Stub_table<size, big_endian>* stub_table
5633 = object->stub_table(relinfo->data_shndx);
5634 if (stub_table == NULL)
5636 // This is a ref from a data section to an ifunc symbol.
5637 if (target->stub_tables().size() != 0)
5638 stub_table = target->stub_tables()[0];
5640 gold_assert(stub_table != NULL);
5643 off = stub_table->find_plt_call_entry(object, gsym, r_type,
5644 rela.get_r_addend());
5646 off = stub_table->find_plt_call_entry(object, r_sym, r_type,
5647 rela.get_r_addend());
5648 gold_assert(off != invalid_address);
5649 value = stub_table->stub_address() + off;
5650 has_plt_value = true;
5653 if (r_type == elfcpp::R_POWERPC_GOT16
5654 || r_type == elfcpp::R_POWERPC_GOT16_LO
5655 || r_type == elfcpp::R_POWERPC_GOT16_HI
5656 || r_type == elfcpp::R_POWERPC_GOT16_HA
5657 || r_type == elfcpp::R_PPC64_GOT16_DS
5658 || r_type == elfcpp::R_PPC64_GOT16_LO_DS)
5662 gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD));
5663 value = gsym->got_offset(GOT_TYPE_STANDARD);
5667 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
5668 gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD));
5669 value = object->local_got_offset(r_sym, GOT_TYPE_STANDARD);
5671 value -= target->got_section()->got_base_offset(object);
5673 else if (r_type == elfcpp::R_PPC64_TOC)
5675 value = (target->got_section()->output_section()->address()
5676 + object->toc_base_offset());
5678 else if (gsym != NULL
5679 && (r_type == elfcpp::R_POWERPC_REL24
5680 || r_type == elfcpp::R_PPC_PLTREL24)
5685 typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype;
5686 Valtype* wv = reinterpret_cast<Valtype*>(view);
5687 bool can_plt_call = false;
5688 if (rela.get_r_offset() + 8 <= view_size)
5690 Valtype insn = elfcpp::Swap<32, big_endian>::readval(wv);
5691 Valtype insn2 = elfcpp::Swap<32, big_endian>::readval(wv + 1);
5694 || insn2 == cror_15_15_15 || insn2 == cror_31_31_31))
5696 elfcpp::Swap<32, big_endian>::writeval(wv + 1, ld_2_1 + 40);
5697 can_plt_call = true;
5702 // If we don't have a branch and link followed by a nop,
5703 // we can't go via the plt because there is no place to
5704 // put a toc restoring instruction.
5705 // Unless we know we won't be returning.
5706 if (strcmp(gsym->name(), "__libc_start_main") == 0)
5707 can_plt_call = true;
5711 // This is not an error in one special case: A self
5712 // call. It isn't possible to cheaply verify we have
5713 // such a call so just check for a call to the same
5716 Address code = value;
5717 if (gsym->source() == Symbol::FROM_OBJECT
5718 && gsym->object() == object)
5720 Address addend = rela.get_r_addend();
5721 unsigned int dest_shndx;
5722 Address opdent = psymval->value(object, addend);
5723 code = target->symval_for_branch(opdent, gsym, object,
5726 if (dest_shndx == 0)
5727 dest_shndx = gsym->shndx(&is_ordinary);
5728 ok = dest_shndx == relinfo->data_shndx;
5732 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
5733 _("call lacks nop, can't restore toc; "
5734 "recompile with -fPIC"));
5740 else if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
5741 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO
5742 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI
5743 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA)
5745 // First instruction of a global dynamic sequence, arg setup insn.
5746 const bool final = gsym == NULL || gsym->final_value_is_known();
5747 const tls::Tls_optimization tls_type = target->optimize_tls_gd(final);
5748 enum Got_type got_type = GOT_TYPE_STANDARD;
5749 if (tls_type == tls::TLSOPT_NONE)
5750 got_type = GOT_TYPE_TLSGD;
5751 else if (tls_type == tls::TLSOPT_TO_IE)
5752 got_type = GOT_TYPE_TPREL;
5753 if (got_type != GOT_TYPE_STANDARD)
5757 gold_assert(gsym->has_got_offset(got_type));
5758 value = gsym->got_offset(got_type);
5762 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
5763 gold_assert(object->local_has_got_offset(r_sym, got_type));
5764 value = object->local_got_offset(r_sym, got_type);
5766 value -= target->got_section()->got_base_offset(object);
5768 if (tls_type == tls::TLSOPT_TO_IE)
5770 if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
5771 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO)
5773 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
5774 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
5775 insn &= (1 << 26) - (1 << 16); // extract rt,ra from addi
5777 insn |= 32 << 26; // lwz
5779 insn |= 58 << 26; // ld
5780 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
5782 r_type += (elfcpp::R_POWERPC_GOT_TPREL16
5783 - elfcpp::R_POWERPC_GOT_TLSGD16);
5785 else if (tls_type == tls::TLSOPT_TO_LE)
5787 if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
5788 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO)
5790 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
5791 Insn insn = addis_3_13;
5794 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
5795 r_type = elfcpp::R_POWERPC_TPREL16_HA;
5796 value = psymval->value(object, rela.get_r_addend());
5800 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
5802 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
5803 r_type = elfcpp::R_POWERPC_NONE;
5807 else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16
5808 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO
5809 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI
5810 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA)
5812 // First instruction of a local dynamic sequence, arg setup insn.
5813 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
5814 if (tls_type == tls::TLSOPT_NONE)
5816 value = target->tlsld_got_offset();
5817 value -= target->got_section()->got_base_offset(object);
5821 gold_assert(tls_type == tls::TLSOPT_TO_LE);
5822 if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16
5823 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO)
5825 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
5826 Insn insn = addis_3_13;
5829 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
5830 r_type = elfcpp::R_POWERPC_TPREL16_HA;
5835 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
5837 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
5838 r_type = elfcpp::R_POWERPC_NONE;
5842 else if (r_type == elfcpp::R_POWERPC_GOT_DTPREL16
5843 || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_LO
5844 || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HI
5845 || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HA)
5847 // Accesses relative to a local dynamic sequence address,
5848 // no optimisation here.
5851 gold_assert(gsym->has_got_offset(GOT_TYPE_DTPREL));
5852 value = gsym->got_offset(GOT_TYPE_DTPREL);
5856 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
5857 gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_DTPREL));
5858 value = object->local_got_offset(r_sym, GOT_TYPE_DTPREL);
5860 value -= target->got_section()->got_base_offset(object);
5862 else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16
5863 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO
5864 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI
5865 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA)
5867 // First instruction of initial exec sequence.
5868 const bool final = gsym == NULL || gsym->final_value_is_known();
5869 const tls::Tls_optimization tls_type = target->optimize_tls_ie(final);
5870 if (tls_type == tls::TLSOPT_NONE)
5874 gold_assert(gsym->has_got_offset(GOT_TYPE_TPREL));
5875 value = gsym->got_offset(GOT_TYPE_TPREL);
5879 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
5880 gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_TPREL));
5881 value = object->local_got_offset(r_sym, GOT_TYPE_TPREL);
5883 value -= target->got_section()->got_base_offset(object);
5887 gold_assert(tls_type == tls::TLSOPT_TO_LE);
5888 if (r_type == elfcpp::R_POWERPC_GOT_TPREL16
5889 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO)
5891 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
5892 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
5893 insn &= (1 << 26) - (1 << 21); // extract rt from ld
5898 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
5899 r_type = elfcpp::R_POWERPC_TPREL16_HA;
5900 value = psymval->value(object, rela.get_r_addend());
5904 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
5906 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
5907 r_type = elfcpp::R_POWERPC_NONE;
5911 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD)
5912 || (size == 32 && r_type == elfcpp::R_PPC_TLSGD))
5914 // Second instruction of a global dynamic sequence,
5915 // the __tls_get_addr call
5916 this->call_tls_get_addr_ = CALL_EXPECTED;
5917 const bool final = gsym == NULL || gsym->final_value_is_known();
5918 const tls::Tls_optimization tls_type = target->optimize_tls_gd(final);
5919 if (tls_type != tls::TLSOPT_NONE)
5921 if (tls_type == tls::TLSOPT_TO_IE)
5923 Insn* iview = reinterpret_cast<Insn*>(view);
5924 Insn insn = add_3_3_13;
5927 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
5928 r_type = elfcpp::R_POWERPC_NONE;
5932 Insn* iview = reinterpret_cast<Insn*>(view);
5933 Insn insn = addi_3_3;
5934 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
5935 r_type = elfcpp::R_POWERPC_TPREL16_LO;
5936 view += 2 * big_endian;
5937 value = psymval->value(object, rela.get_r_addend());
5939 this->call_tls_get_addr_ = CALL_SKIP;
5942 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD)
5943 || (size == 32 && r_type == elfcpp::R_PPC_TLSLD))
5945 // Second instruction of a local dynamic sequence,
5946 // the __tls_get_addr call
5947 this->call_tls_get_addr_ = CALL_EXPECTED;
5948 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
5949 if (tls_type == tls::TLSOPT_TO_LE)
5951 Insn* iview = reinterpret_cast<Insn*>(view);
5952 Insn insn = addi_3_3;
5953 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
5954 this->call_tls_get_addr_ = CALL_SKIP;
5955 r_type = elfcpp::R_POWERPC_TPREL16_LO;
5956 view += 2 * big_endian;
5960 else if (r_type == elfcpp::R_POWERPC_TLS)
5962 // Second instruction of an initial exec sequence
5963 const bool final = gsym == NULL || gsym->final_value_is_known();
5964 const tls::Tls_optimization tls_type = target->optimize_tls_ie(final);
5965 if (tls_type == tls::TLSOPT_TO_LE)
5967 Insn* iview = reinterpret_cast<Insn*>(view);
5968 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
5969 unsigned int reg = size == 32 ? 2 : 13;
5970 insn = at_tls_transform(insn, reg);
5971 gold_assert(insn != 0);
5972 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
5973 r_type = elfcpp::R_POWERPC_TPREL16_LO;
5974 view += 2 * big_endian;
5975 value = psymval->value(object, rela.get_r_addend());
5978 else if (!has_plt_value)
5981 unsigned int dest_shndx;
5982 if (r_type != elfcpp::R_PPC_PLTREL24)
5983 addend = rela.get_r_addend();
5984 value = psymval->value(object, addend);
5985 if (size == 64 && is_branch_reloc(r_type))
5986 value = target->symval_for_branch(value, gsym, object, &dest_shndx);
5987 unsigned int max_branch_offset = 0;
5988 if (r_type == elfcpp::R_POWERPC_REL24
5989 || r_type == elfcpp::R_PPC_PLTREL24
5990 || r_type == elfcpp::R_PPC_LOCAL24PC)
5991 max_branch_offset = 1 << 25;
5992 else if (r_type == elfcpp::R_POWERPC_REL14
5993 || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN
5994 || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN)
5995 max_branch_offset = 1 << 15;
5996 if (max_branch_offset != 0
5997 && value - address + max_branch_offset >= 2 * max_branch_offset)
5999 Stub_table<size, big_endian>* stub_table
6000 = object->stub_table(relinfo->data_shndx);
6001 gold_assert(stub_table != NULL);
6002 Address off = stub_table->find_long_branch_entry(object, value);
6003 if (off != invalid_address)
6004 value = stub_table->stub_address() + stub_table->plt_size() + off;
6010 case elfcpp::R_PPC64_REL64:
6011 case elfcpp::R_POWERPC_REL32:
6012 case elfcpp::R_POWERPC_REL24:
6013 case elfcpp::R_PPC_PLTREL24:
6014 case elfcpp::R_PPC_LOCAL24PC:
6015 case elfcpp::R_POWERPC_REL16:
6016 case elfcpp::R_POWERPC_REL16_LO:
6017 case elfcpp::R_POWERPC_REL16_HI:
6018 case elfcpp::R_POWERPC_REL16_HA:
6019 case elfcpp::R_POWERPC_REL14:
6020 case elfcpp::R_POWERPC_REL14_BRTAKEN:
6021 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
6025 case elfcpp::R_PPC64_TOC16:
6026 case elfcpp::R_PPC64_TOC16_LO:
6027 case elfcpp::R_PPC64_TOC16_HI:
6028 case elfcpp::R_PPC64_TOC16_HA:
6029 case elfcpp::R_PPC64_TOC16_DS:
6030 case elfcpp::R_PPC64_TOC16_LO_DS:
6031 // Subtract the TOC base address.
6032 value -= (target->got_section()->output_section()->address()
6033 + object->toc_base_offset());
6036 case elfcpp::R_POWERPC_SECTOFF:
6037 case elfcpp::R_POWERPC_SECTOFF_LO:
6038 case elfcpp::R_POWERPC_SECTOFF_HI:
6039 case elfcpp::R_POWERPC_SECTOFF_HA:
6040 case elfcpp::R_PPC64_SECTOFF_DS:
6041 case elfcpp::R_PPC64_SECTOFF_LO_DS:
6043 value -= os->address();
6046 case elfcpp::R_PPC64_TPREL16_DS:
6047 case elfcpp::R_PPC64_TPREL16_LO_DS:
6049 // R_PPC_TLSGD and R_PPC_TLSLD
6051 case elfcpp::R_POWERPC_TPREL16:
6052 case elfcpp::R_POWERPC_TPREL16_LO:
6053 case elfcpp::R_POWERPC_TPREL16_HI:
6054 case elfcpp::R_POWERPC_TPREL16_HA:
6055 case elfcpp::R_POWERPC_TPREL:
6056 case elfcpp::R_PPC64_TPREL16_HIGHER:
6057 case elfcpp::R_PPC64_TPREL16_HIGHERA:
6058 case elfcpp::R_PPC64_TPREL16_HIGHEST:
6059 case elfcpp::R_PPC64_TPREL16_HIGHESTA:
6060 // tls symbol values are relative to tls_segment()->vaddr()
6064 case elfcpp::R_PPC64_DTPREL16_DS:
6065 case elfcpp::R_PPC64_DTPREL16_LO_DS:
6066 case elfcpp::R_PPC64_DTPREL16_HIGHER:
6067 case elfcpp::R_PPC64_DTPREL16_HIGHERA:
6068 case elfcpp::R_PPC64_DTPREL16_HIGHEST:
6069 case elfcpp::R_PPC64_DTPREL16_HIGHESTA:
6071 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO
6072 // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16
6074 case elfcpp::R_POWERPC_DTPREL16:
6075 case elfcpp::R_POWERPC_DTPREL16_LO:
6076 case elfcpp::R_POWERPC_DTPREL16_HI:
6077 case elfcpp::R_POWERPC_DTPREL16_HA:
6078 case elfcpp::R_POWERPC_DTPREL:
6079 // tls symbol values are relative to tls_segment()->vaddr()
6080 value -= dtp_offset;
6087 Insn branch_bit = 0;
6090 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
6091 case elfcpp::R_POWERPC_REL14_BRTAKEN:
6092 branch_bit = 1 << 21;
6093 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
6094 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
6096 Insn* iview = reinterpret_cast<Insn*>(view);
6097 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
6100 if (this->is_isa_v2)
6102 // Set 'a' bit. This is 0b00010 in BO field for branch
6103 // on CR(BI) insns (BO == 001at or 011at), and 0b01000
6104 // for branch on CTR insns (BO == 1a00t or 1a01t).
6105 if ((insn & (0x14 << 21)) == (0x04 << 21))
6107 else if ((insn & (0x14 << 21)) == (0x10 << 21))
6114 // Invert 'y' bit if not the default.
6115 if (static_cast<Signed_address>(value) < 0)
6118 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
6128 // Multi-instruction sequences that access the TOC can be
6129 // optimized, eg. addis ra,r2,0; addi rb,ra,x;
6130 // to nop; addi rb,r2,x;
6136 case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
6137 case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
6138 case elfcpp::R_POWERPC_GOT_TPREL16_HA:
6139 case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
6140 case elfcpp::R_POWERPC_GOT16_HA:
6141 case elfcpp::R_PPC64_TOC16_HA:
6142 if (parameters->options().toc_optimize())
6144 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
6145 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
6146 if ((insn & ((0x3f << 26) | 0x1f << 16))
6147 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
6148 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
6149 _("toc optimization is not supported "
6150 "for %#08x instruction"), insn);
6151 else if (value + 0x8000 < 0x10000)
6153 elfcpp::Swap<32, big_endian>::writeval(iview, nop);
6159 case elfcpp::R_POWERPC_GOT_TLSLD16_LO:
6160 case elfcpp::R_POWERPC_GOT_TLSGD16_LO:
6161 case elfcpp::R_POWERPC_GOT_TPREL16_LO:
6162 case elfcpp::R_POWERPC_GOT_DTPREL16_LO:
6163 case elfcpp::R_POWERPC_GOT16_LO:
6164 case elfcpp::R_PPC64_GOT16_LO_DS:
6165 case elfcpp::R_PPC64_TOC16_LO:
6166 case elfcpp::R_PPC64_TOC16_LO_DS:
6167 if (parameters->options().toc_optimize())
6169 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
6170 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
6171 if (!ok_lo_toc_insn(insn))
6172 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
6173 _("toc optimization is not supported "
6174 "for %#08x instruction"), insn);
6175 else if (value + 0x8000 < 0x10000)
6177 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
6179 // Transform addic to addi when we change reg.
6180 insn &= ~((0x3f << 26) | (0x1f << 16));
6181 insn |= (14u << 26) | (2 << 16);
6185 insn &= ~(0x1f << 16);
6188 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
6195 typename Reloc::Overflow_check overflow = Reloc::CHECK_NONE;
6198 case elfcpp::R_POWERPC_ADDR32:
6199 case elfcpp::R_POWERPC_UADDR32:
6201 overflow = Reloc::CHECK_BITFIELD;
6204 case elfcpp::R_POWERPC_REL32:
6206 overflow = Reloc::CHECK_SIGNED;
6209 case elfcpp::R_POWERPC_ADDR24:
6210 case elfcpp::R_POWERPC_ADDR16:
6211 case elfcpp::R_POWERPC_UADDR16:
6212 case elfcpp::R_PPC64_ADDR16_DS:
6213 case elfcpp::R_POWERPC_ADDR14:
6214 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
6215 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
6216 overflow = Reloc::CHECK_BITFIELD;
6219 case elfcpp::R_POWERPC_REL24:
6220 case elfcpp::R_PPC_PLTREL24:
6221 case elfcpp::R_PPC_LOCAL24PC:
6222 case elfcpp::R_POWERPC_REL16:
6223 case elfcpp::R_PPC64_TOC16:
6224 case elfcpp::R_POWERPC_GOT16:
6225 case elfcpp::R_POWERPC_SECTOFF:
6226 case elfcpp::R_POWERPC_TPREL16:
6227 case elfcpp::R_POWERPC_DTPREL16:
6228 case elfcpp::R_PPC64_TPREL16_DS:
6229 case elfcpp::R_PPC64_DTPREL16_DS:
6230 case elfcpp::R_PPC64_TOC16_DS:
6231 case elfcpp::R_PPC64_GOT16_DS:
6232 case elfcpp::R_PPC64_SECTOFF_DS:
6233 case elfcpp::R_POWERPC_REL14:
6234 case elfcpp::R_POWERPC_REL14_BRTAKEN:
6235 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
6236 case elfcpp::R_POWERPC_GOT_TLSGD16:
6237 case elfcpp::R_POWERPC_GOT_TLSLD16:
6238 case elfcpp::R_POWERPC_GOT_TPREL16:
6239 case elfcpp::R_POWERPC_GOT_DTPREL16:
6240 overflow = Reloc::CHECK_SIGNED;
6244 typename Powerpc_relocate_functions<size, big_endian>::Status status
6245 = Powerpc_relocate_functions<size, big_endian>::STATUS_OK;
6248 case elfcpp::R_POWERPC_NONE:
6249 case elfcpp::R_POWERPC_TLS:
6250 case elfcpp::R_POWERPC_GNU_VTINHERIT:
6251 case elfcpp::R_POWERPC_GNU_VTENTRY:
6252 case elfcpp::R_PPC_EMB_MRKREF:
6255 case elfcpp::R_PPC64_ADDR64:
6256 case elfcpp::R_PPC64_REL64:
6257 case elfcpp::R_PPC64_TOC:
6258 Reloc::addr64(view, value);
6261 case elfcpp::R_POWERPC_TPREL:
6262 case elfcpp::R_POWERPC_DTPREL:
6264 Reloc::addr64(view, value);
6266 status = Reloc::addr32(view, value, overflow);
6269 case elfcpp::R_PPC64_UADDR64:
6270 Reloc::addr64_u(view, value);
6273 case elfcpp::R_POWERPC_ADDR32:
6274 status = Reloc::addr32(view, value, overflow);
6277 case elfcpp::R_POWERPC_REL32:
6278 case elfcpp::R_POWERPC_UADDR32:
6279 status = Reloc::addr32_u(view, value, overflow);
6282 case elfcpp::R_POWERPC_ADDR24:
6283 case elfcpp::R_POWERPC_REL24:
6284 case elfcpp::R_PPC_PLTREL24:
6285 case elfcpp::R_PPC_LOCAL24PC:
6286 status = Reloc::addr24(view, value, overflow);
6289 case elfcpp::R_POWERPC_GOT_DTPREL16:
6290 case elfcpp::R_POWERPC_GOT_DTPREL16_LO:
6293 status = Reloc::addr16_ds(view, value, overflow);
6296 case elfcpp::R_POWERPC_ADDR16:
6297 case elfcpp::R_POWERPC_REL16:
6298 case elfcpp::R_PPC64_TOC16:
6299 case elfcpp::R_POWERPC_GOT16:
6300 case elfcpp::R_POWERPC_SECTOFF:
6301 case elfcpp::R_POWERPC_TPREL16:
6302 case elfcpp::R_POWERPC_DTPREL16:
6303 case elfcpp::R_POWERPC_GOT_TLSGD16:
6304 case elfcpp::R_POWERPC_GOT_TLSLD16:
6305 case elfcpp::R_POWERPC_GOT_TPREL16:
6306 case elfcpp::R_POWERPC_ADDR16_LO:
6307 case elfcpp::R_POWERPC_REL16_LO:
6308 case elfcpp::R_PPC64_TOC16_LO:
6309 case elfcpp::R_POWERPC_GOT16_LO:
6310 case elfcpp::R_POWERPC_SECTOFF_LO:
6311 case elfcpp::R_POWERPC_TPREL16_LO:
6312 case elfcpp::R_POWERPC_DTPREL16_LO:
6313 case elfcpp::R_POWERPC_GOT_TLSGD16_LO:
6314 case elfcpp::R_POWERPC_GOT_TLSLD16_LO:
6315 case elfcpp::R_POWERPC_GOT_TPREL16_LO:
6316 status = Reloc::addr16(view, value, overflow);
6319 case elfcpp::R_POWERPC_UADDR16:
6320 status = Reloc::addr16_u(view, value, overflow);
6323 case elfcpp::R_POWERPC_ADDR16_HI:
6324 case elfcpp::R_POWERPC_REL16_HI:
6325 case elfcpp::R_PPC64_TOC16_HI:
6326 case elfcpp::R_POWERPC_GOT16_HI:
6327 case elfcpp::R_POWERPC_SECTOFF_HI:
6328 case elfcpp::R_POWERPC_TPREL16_HI:
6329 case elfcpp::R_POWERPC_DTPREL16_HI:
6330 case elfcpp::R_POWERPC_GOT_TLSGD16_HI:
6331 case elfcpp::R_POWERPC_GOT_TLSLD16_HI:
6332 case elfcpp::R_POWERPC_GOT_TPREL16_HI:
6333 case elfcpp::R_POWERPC_GOT_DTPREL16_HI:
6334 Reloc::addr16_hi(view, value);
6337 case elfcpp::R_POWERPC_ADDR16_HA:
6338 case elfcpp::R_POWERPC_REL16_HA:
6339 case elfcpp::R_PPC64_TOC16_HA:
6340 case elfcpp::R_POWERPC_GOT16_HA:
6341 case elfcpp::R_POWERPC_SECTOFF_HA:
6342 case elfcpp::R_POWERPC_TPREL16_HA:
6343 case elfcpp::R_POWERPC_DTPREL16_HA:
6344 case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
6345 case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
6346 case elfcpp::R_POWERPC_GOT_TPREL16_HA:
6347 case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
6348 Reloc::addr16_ha(view, value);
6351 case elfcpp::R_PPC64_DTPREL16_HIGHER:
6353 // R_PPC_EMB_NADDR16_LO
6355 case elfcpp::R_PPC64_ADDR16_HIGHER:
6356 case elfcpp::R_PPC64_TPREL16_HIGHER:
6357 Reloc::addr16_hi2(view, value);
6360 case elfcpp::R_PPC64_DTPREL16_HIGHERA:
6362 // R_PPC_EMB_NADDR16_HI
6364 case elfcpp::R_PPC64_ADDR16_HIGHERA:
6365 case elfcpp::R_PPC64_TPREL16_HIGHERA:
6366 Reloc::addr16_ha2(view, value);
6369 case elfcpp::R_PPC64_DTPREL16_HIGHEST:
6371 // R_PPC_EMB_NADDR16_HA
6373 case elfcpp::R_PPC64_ADDR16_HIGHEST:
6374 case elfcpp::R_PPC64_TPREL16_HIGHEST:
6375 Reloc::addr16_hi3(view, value);
6378 case elfcpp::R_PPC64_DTPREL16_HIGHESTA:
6382 case elfcpp::R_PPC64_ADDR16_HIGHESTA:
6383 case elfcpp::R_PPC64_TPREL16_HIGHESTA:
6384 Reloc::addr16_ha3(view, value);
6387 case elfcpp::R_PPC64_DTPREL16_DS:
6388 case elfcpp::R_PPC64_DTPREL16_LO_DS:
6390 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16
6392 case elfcpp::R_PPC64_TPREL16_DS:
6393 case elfcpp::R_PPC64_TPREL16_LO_DS:
6395 // R_PPC_TLSGD, R_PPC_TLSLD
6397 case elfcpp::R_PPC64_ADDR16_DS:
6398 case elfcpp::R_PPC64_ADDR16_LO_DS:
6399 case elfcpp::R_PPC64_TOC16_DS:
6400 case elfcpp::R_PPC64_TOC16_LO_DS:
6401 case elfcpp::R_PPC64_GOT16_DS:
6402 case elfcpp::R_PPC64_GOT16_LO_DS:
6403 case elfcpp::R_PPC64_SECTOFF_DS:
6404 case elfcpp::R_PPC64_SECTOFF_LO_DS:
6405 status = Reloc::addr16_ds(view, value, overflow);
6408 case elfcpp::R_POWERPC_ADDR14:
6409 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
6410 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
6411 case elfcpp::R_POWERPC_REL14:
6412 case elfcpp::R_POWERPC_REL14_BRTAKEN:
6413 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
6414 status = Reloc::addr14(view, value, overflow);
6417 case elfcpp::R_POWERPC_COPY:
6418 case elfcpp::R_POWERPC_GLOB_DAT:
6419 case elfcpp::R_POWERPC_JMP_SLOT:
6420 case elfcpp::R_POWERPC_RELATIVE:
6421 case elfcpp::R_POWERPC_DTPMOD:
6422 case elfcpp::R_PPC64_JMP_IREL:
6423 case elfcpp::R_POWERPC_IRELATIVE:
6424 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
6425 _("unexpected reloc %u in object file"),
6429 case elfcpp::R_PPC_EMB_SDA21:
6434 // R_PPC64_TOCSAVE. For the time being this can be ignored.
6438 case elfcpp::R_PPC_EMB_SDA2I16:
6439 case elfcpp::R_PPC_EMB_SDA2REL:
6442 // R_PPC64_TLSGD, R_PPC64_TLSLD
6445 case elfcpp::R_POWERPC_PLT32:
6446 case elfcpp::R_POWERPC_PLTREL32:
6447 case elfcpp::R_POWERPC_PLT16_LO:
6448 case elfcpp::R_POWERPC_PLT16_HI:
6449 case elfcpp::R_POWERPC_PLT16_HA:
6450 case elfcpp::R_PPC_SDAREL16:
6451 case elfcpp::R_POWERPC_ADDR30:
6452 case elfcpp::R_PPC64_PLT64:
6453 case elfcpp::R_PPC64_PLTREL64:
6454 case elfcpp::R_PPC64_PLTGOT16:
6455 case elfcpp::R_PPC64_PLTGOT16_LO:
6456 case elfcpp::R_PPC64_PLTGOT16_HI:
6457 case elfcpp::R_PPC64_PLTGOT16_HA:
6458 case elfcpp::R_PPC64_PLT16_LO_DS:
6459 case elfcpp::R_PPC64_PLTGOT16_DS:
6460 case elfcpp::R_PPC64_PLTGOT16_LO_DS:
6461 case elfcpp::R_PPC_EMB_RELSEC16:
6462 case elfcpp::R_PPC_EMB_RELST_LO:
6463 case elfcpp::R_PPC_EMB_RELST_HI:
6464 case elfcpp::R_PPC_EMB_RELST_HA:
6465 case elfcpp::R_PPC_EMB_BIT_FLD:
6466 case elfcpp::R_PPC_EMB_RELSDA:
6467 case elfcpp::R_PPC_TOC16:
6470 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
6471 _("unsupported reloc %u"),
6475 if (status != Powerpc_relocate_functions<size, big_endian>::STATUS_OK)
6476 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
6477 _("relocation overflow"));
6482 // Relocate section data.
6484 template<int size, bool big_endian>
6486 Target_powerpc<size, big_endian>::relocate_section(
6487 const Relocate_info<size, big_endian>* relinfo,
6488 unsigned int sh_type,
6489 const unsigned char* prelocs,
6491 Output_section* output_section,
6492 bool needs_special_offset_handling,
6493 unsigned char* view,
6495 section_size_type view_size,
6496 const Reloc_symbol_changes* reloc_symbol_changes)
6498 typedef Target_powerpc<size, big_endian> Powerpc;
6499 typedef typename Target_powerpc<size, big_endian>::Relocate Powerpc_relocate;
6500 typedef typename Target_powerpc<size, big_endian>::Relocate_comdat_behavior
6501 Powerpc_comdat_behavior;
6503 gold_assert(sh_type == elfcpp::SHT_RELA);
6505 gold::relocate_section<size, big_endian, Powerpc, elfcpp::SHT_RELA,
6506 Powerpc_relocate, Powerpc_comdat_behavior>(
6512 needs_special_offset_handling,
6516 reloc_symbol_changes);
6519 class Powerpc_scan_relocatable_reloc
6522 // Return the strategy to use for a local symbol which is not a
6523 // section symbol, given the relocation type.
6524 inline Relocatable_relocs::Reloc_strategy
6525 local_non_section_strategy(unsigned int r_type, Relobj*, unsigned int r_sym)
6527 if (r_type == 0 && r_sym == 0)
6528 return Relocatable_relocs::RELOC_DISCARD;
6529 return Relocatable_relocs::RELOC_COPY;
6532 // Return the strategy to use for a local symbol which is a section
6533 // symbol, given the relocation type.
6534 inline Relocatable_relocs::Reloc_strategy
6535 local_section_strategy(unsigned int, Relobj*)
6537 return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA;
6540 // Return the strategy to use for a global symbol, given the
6541 // relocation type, the object, and the symbol index.
6542 inline Relocatable_relocs::Reloc_strategy
6543 global_strategy(unsigned int r_type, Relobj*, unsigned int)
6545 if (r_type == elfcpp::R_PPC_PLTREL24)
6546 return Relocatable_relocs::RELOC_SPECIAL;
6547 return Relocatable_relocs::RELOC_COPY;
6551 // Scan the relocs during a relocatable link.
6553 template<int size, bool big_endian>
6555 Target_powerpc<size, big_endian>::scan_relocatable_relocs(
6556 Symbol_table* symtab,
6558 Sized_relobj_file<size, big_endian>* object,
6559 unsigned int data_shndx,
6560 unsigned int sh_type,
6561 const unsigned char* prelocs,
6563 Output_section* output_section,
6564 bool needs_special_offset_handling,
6565 size_t local_symbol_count,
6566 const unsigned char* plocal_symbols,
6567 Relocatable_relocs* rr)
6569 gold_assert(sh_type == elfcpp::SHT_RELA);
6571 gold::scan_relocatable_relocs<size, big_endian, elfcpp::SHT_RELA,
6572 Powerpc_scan_relocatable_reloc>(
6580 needs_special_offset_handling,
6586 // Emit relocations for a section.
6587 // This is a modified version of the function by the same name in
6588 // target-reloc.h. Using relocate_special_relocatable for
6589 // R_PPC_PLTREL24 would require duplication of the entire body of the
6590 // loop, so we may as well duplicate the whole thing.
6592 template<int size, bool big_endian>
6594 Target_powerpc<size, big_endian>::relocate_relocs(
6595 const Relocate_info<size, big_endian>* relinfo,
6596 unsigned int sh_type,
6597 const unsigned char* prelocs,
6599 Output_section* output_section,
6600 typename elfcpp::Elf_types<size>::Elf_Off offset_in_output_section,
6601 const Relocatable_relocs* rr,
6603 Address view_address,
6605 unsigned char* reloc_view,
6606 section_size_type reloc_view_size)
6608 gold_assert(sh_type == elfcpp::SHT_RELA);
6610 typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc
6612 typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc_write
6614 const int reloc_size
6615 = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size;
6617 Powerpc_relobj<size, big_endian>* const object
6618 = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object);
6619 const unsigned int local_count = object->local_symbol_count();
6620 unsigned int got2_shndx = object->got2_shndx();
6621 Address got2_addend = 0;
6622 if (got2_shndx != 0)
6624 got2_addend = object->get_output_section_offset(got2_shndx);
6625 gold_assert(got2_addend != invalid_address);
6628 unsigned char* pwrite = reloc_view;
6629 bool zap_next = false;
6630 for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size)
6632 Relocatable_relocs::Reloc_strategy strategy = rr->strategy(i);
6633 if (strategy == Relocatable_relocs::RELOC_DISCARD)
6636 Reltype reloc(prelocs);
6637 Reltype_write reloc_write(pwrite);
6639 Address offset = reloc.get_r_offset();
6640 typename elfcpp::Elf_types<size>::Elf_WXword r_info = reloc.get_r_info();
6641 unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info);
6642 unsigned int r_type = elfcpp::elf_r_type<size>(r_info);
6643 const unsigned int orig_r_sym = r_sym;
6644 typename elfcpp::Elf_types<size>::Elf_Swxword addend
6645 = reloc.get_r_addend();
6646 const Symbol* gsym = NULL;
6650 // We could arrange to discard these and other relocs for
6651 // tls optimised sequences in the strategy methods, but for
6652 // now do as BFD ld does.
6653 r_type = elfcpp::R_POWERPC_NONE;
6657 // Get the new symbol index.
6658 if (r_sym < local_count)
6662 case Relocatable_relocs::RELOC_COPY:
6663 case Relocatable_relocs::RELOC_SPECIAL:
6666 r_sym = object->symtab_index(r_sym);
6667 gold_assert(r_sym != -1U);
6671 case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA:
6673 // We are adjusting a section symbol. We need to find
6674 // the symbol table index of the section symbol for
6675 // the output section corresponding to input section
6676 // in which this symbol is defined.
6677 gold_assert(r_sym < local_count);
6679 unsigned int shndx =
6680 object->local_symbol_input_shndx(r_sym, &is_ordinary);
6681 gold_assert(is_ordinary);
6682 Output_section* os = object->output_section(shndx);
6683 gold_assert(os != NULL);
6684 gold_assert(os->needs_symtab_index());
6685 r_sym = os->symtab_index();
6695 gsym = object->global_symbol(r_sym);
6696 gold_assert(gsym != NULL);
6697 if (gsym->is_forwarder())
6698 gsym = relinfo->symtab->resolve_forwards(gsym);
6700 gold_assert(gsym->has_symtab_index());
6701 r_sym = gsym->symtab_index();
6704 // Get the new offset--the location in the output section where
6705 // this relocation should be applied.
6706 if (static_cast<Address>(offset_in_output_section) != invalid_address)
6707 offset += offset_in_output_section;
6710 section_offset_type sot_offset =
6711 convert_types<section_offset_type, Address>(offset);
6712 section_offset_type new_sot_offset =
6713 output_section->output_offset(object, relinfo->data_shndx,
6715 gold_assert(new_sot_offset != -1);
6716 offset = new_sot_offset;
6719 // In an object file, r_offset is an offset within the section.
6720 // In an executable or dynamic object, generated by
6721 // --emit-relocs, r_offset is an absolute address.
6722 if (!parameters->options().relocatable())
6724 offset += view_address;
6725 if (static_cast<Address>(offset_in_output_section) != invalid_address)
6726 offset -= offset_in_output_section;
6729 // Handle the reloc addend based on the strategy.
6730 if (strategy == Relocatable_relocs::RELOC_COPY)
6732 else if (strategy == Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA)
6734 const Symbol_value<size>* psymval = object->local_symbol(orig_r_sym);
6735 addend = psymval->value(object, addend);
6737 else if (strategy == Relocatable_relocs::RELOC_SPECIAL)
6739 if (addend >= 32768)
6740 addend += got2_addend;
6745 if (!parameters->options().relocatable())
6747 if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
6748 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO
6749 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI
6750 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA)
6752 // First instruction of a global dynamic sequence,
6754 const bool final = gsym == NULL || gsym->final_value_is_known();
6755 switch (this->optimize_tls_gd(final))
6757 case tls::TLSOPT_TO_IE:
6758 r_type += (elfcpp::R_POWERPC_GOT_TPREL16
6759 - elfcpp::R_POWERPC_GOT_TLSGD16);
6761 case tls::TLSOPT_TO_LE:
6762 if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
6763 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO)
6764 r_type = elfcpp::R_POWERPC_TPREL16_HA;
6767 r_type = elfcpp::R_POWERPC_NONE;
6768 offset -= 2 * big_endian;
6775 else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16
6776 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO
6777 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI
6778 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA)
6780 // First instruction of a local dynamic sequence,
6782 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE)
6784 if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16
6785 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO)
6787 r_type = elfcpp::R_POWERPC_TPREL16_HA;
6788 const Output_section* os = relinfo->layout->tls_segment()
6790 gold_assert(os != NULL);
6791 gold_assert(os->needs_symtab_index());
6792 r_sym = os->symtab_index();
6793 addend = dtp_offset;
6797 r_type = elfcpp::R_POWERPC_NONE;
6798 offset -= 2 * big_endian;
6802 else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16
6803 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO
6804 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI
6805 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA)
6807 // First instruction of initial exec sequence.
6808 const bool final = gsym == NULL || gsym->final_value_is_known();
6809 if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE)
6811 if (r_type == elfcpp::R_POWERPC_GOT_TPREL16
6812 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO)
6813 r_type = elfcpp::R_POWERPC_TPREL16_HA;
6816 r_type = elfcpp::R_POWERPC_NONE;
6817 offset -= 2 * big_endian;
6821 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD)
6822 || (size == 32 && r_type == elfcpp::R_PPC_TLSGD))
6824 // Second instruction of a global dynamic sequence,
6825 // the __tls_get_addr call
6826 const bool final = gsym == NULL || gsym->final_value_is_known();
6827 switch (this->optimize_tls_gd(final))
6829 case tls::TLSOPT_TO_IE:
6830 r_type = elfcpp::R_POWERPC_NONE;
6833 case tls::TLSOPT_TO_LE:
6834 r_type = elfcpp::R_POWERPC_TPREL16_LO;
6835 offset += 2 * big_endian;
6842 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD)
6843 || (size == 32 && r_type == elfcpp::R_PPC_TLSLD))
6845 // Second instruction of a local dynamic sequence,
6846 // the __tls_get_addr call
6847 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE)
6849 const Output_section* os = relinfo->layout->tls_segment()
6851 gold_assert(os != NULL);
6852 gold_assert(os->needs_symtab_index());
6853 r_sym = os->symtab_index();
6854 addend = dtp_offset;
6855 r_type = elfcpp::R_POWERPC_TPREL16_LO;
6856 offset += 2 * big_endian;
6860 else if (r_type == elfcpp::R_POWERPC_TLS)
6862 // Second instruction of an initial exec sequence
6863 const bool final = gsym == NULL || gsym->final_value_is_known();
6864 if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE)
6866 r_type = elfcpp::R_POWERPC_TPREL16_LO;
6867 offset += 2 * big_endian;
6872 reloc_write.put_r_offset(offset);
6873 reloc_write.put_r_info(elfcpp::elf_r_info<size>(r_sym, r_type));
6874 reloc_write.put_r_addend(addend);
6876 pwrite += reloc_size;
6879 gold_assert(static_cast<section_size_type>(pwrite - reloc_view)
6880 == reloc_view_size);
6883 // Return the value to use for a dynamic symbol which requires special
6884 // treatment. This is how we support equality comparisons of function
6885 // pointers across shared library boundaries, as described in the
6886 // processor specific ABI supplement.
6888 template<int size, bool big_endian>
6890 Target_powerpc<size, big_endian>::do_dynsym_value(const Symbol* gsym) const
6894 gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset());
6895 for (typename Stub_tables::const_iterator p = this->stub_tables_.begin();
6896 p != this->stub_tables_.end();
6899 Address off = (*p)->find_plt_call_entry(gsym);
6900 if (off != invalid_address)
6901 return (*p)->stub_address() + off;
6907 // Return the PLT address to use for a local symbol.
6908 template<int size, bool big_endian>
6910 Target_powerpc<size, big_endian>::do_plt_address_for_local(
6911 const Relobj* object,
6912 unsigned int symndx) const
6916 const Sized_relobj<size, big_endian>* relobj
6917 = static_cast<const Sized_relobj<size, big_endian>*>(object);
6918 for (typename Stub_tables::const_iterator p = this->stub_tables_.begin();
6919 p != this->stub_tables_.end();
6922 Address off = (*p)->find_plt_call_entry(relobj->sized_relobj(),
6924 if (off != invalid_address)
6925 return (*p)->stub_address() + off;
6931 // Return the PLT address to use for a global symbol.
6932 template<int size, bool big_endian>
6934 Target_powerpc<size, big_endian>::do_plt_address_for_global(
6935 const Symbol* gsym) const
6939 for (typename Stub_tables::const_iterator p = this->stub_tables_.begin();
6940 p != this->stub_tables_.end();
6943 Address off = (*p)->find_plt_call_entry(gsym);
6944 if (off != invalid_address)
6945 return (*p)->stub_address() + off;
6951 // Return the offset to use for the GOT_INDX'th got entry which is
6952 // for a local tls symbol specified by OBJECT, SYMNDX.
6953 template<int size, bool big_endian>
6955 Target_powerpc<size, big_endian>::do_tls_offset_for_local(
6956 const Relobj* object,
6957 unsigned int symndx,
6958 unsigned int got_indx) const
6960 const Powerpc_relobj<size, big_endian>* ppc_object
6961 = static_cast<const Powerpc_relobj<size, big_endian>*>(object);
6962 if (ppc_object->local_symbol(symndx)->is_tls_symbol())
6964 for (Got_type got_type = GOT_TYPE_TLSGD;
6965 got_type <= GOT_TYPE_TPREL;
6966 got_type = Got_type(got_type + 1))
6967 if (ppc_object->local_has_got_offset(symndx, got_type))
6969 unsigned int off = ppc_object->local_got_offset(symndx, got_type);
6970 if (got_type == GOT_TYPE_TLSGD)
6972 if (off == got_indx * (size / 8))
6974 if (got_type == GOT_TYPE_TPREL)
6984 // Return the offset to use for the GOT_INDX'th got entry which is
6985 // for global tls symbol GSYM.
6986 template<int size, bool big_endian>
6988 Target_powerpc<size, big_endian>::do_tls_offset_for_global(
6990 unsigned int got_indx) const
6992 if (gsym->type() == elfcpp::STT_TLS)
6994 for (Got_type got_type = GOT_TYPE_TLSGD;
6995 got_type <= GOT_TYPE_TPREL;
6996 got_type = Got_type(got_type + 1))
6997 if (gsym->has_got_offset(got_type))
6999 unsigned int off = gsym->got_offset(got_type);
7000 if (got_type == GOT_TYPE_TLSGD)
7002 if (off == got_indx * (size / 8))
7004 if (got_type == GOT_TYPE_TPREL)
7014 // The selector for powerpc object files.
7016 template<int size, bool big_endian>
7017 class Target_selector_powerpc : public Target_selector
7020 Target_selector_powerpc()
7021 : Target_selector(size == 64 ? elfcpp::EM_PPC64 : elfcpp::EM_PPC,
7024 ? (big_endian ? "elf64-powerpc" : "elf64-powerpcle")
7025 : (big_endian ? "elf32-powerpc" : "elf32-powerpcle")),
7027 ? (big_endian ? "elf64ppc" : "elf64lppc")
7028 : (big_endian ? "elf32ppc" : "elf32lppc")))
7032 do_instantiate_target()
7033 { return new Target_powerpc<size, big_endian>(); }
7036 Target_selector_powerpc<32, true> target_selector_ppc32;
7037 Target_selector_powerpc<32, false> target_selector_ppc32le;
7038 Target_selector_powerpc<64, true> target_selector_ppc64;
7039 Target_selector_powerpc<64, false> target_selector_ppc64le;
7041 // Instantiate these constants for -O0
7042 template<int size, bool big_endian>
7043 const int Output_data_glink<size, big_endian>::pltresolve_size;
7044 template<int size, bool big_endian>
7045 const typename Stub_table<size, big_endian>::Address
7046 Stub_table<size, big_endian>::invalid_address;
7047 template<int size, bool big_endian>
7048 const typename Target_powerpc<size, big_endian>::Address
7049 Target_powerpc<size, big_endian>::invalid_address;
7051 } // End anonymous namespace.