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_; }
638 : tls_get_addr_(NOT_EXPECTED),
639 relinfo_(NULL), relnum_(0), r_offset_(0)
644 if (this->tls_get_addr_ != NOT_EXPECTED)
651 if (this->relinfo_ != NULL)
652 gold_error_at_location(this->relinfo_, this->relnum_, this->r_offset_,
653 _("missing expected __tls_get_addr call"));
657 expect_tls_get_addr_call(
658 const Relocate_info<size, big_endian>* relinfo,
662 this->tls_get_addr_ = EXPECTED;
663 this->relinfo_ = relinfo;
664 this->relnum_ = relnum;
665 this->r_offset_ = r_offset;
669 expect_tls_get_addr_call()
670 { this->tls_get_addr_ = EXPECTED; }
673 skip_next_tls_get_addr_call()
674 {this->tls_get_addr_ = SKIP; }
677 maybe_skip_tls_get_addr_call(unsigned int r_type, const Symbol* gsym)
679 bool is_tls_call = ((r_type == elfcpp::R_POWERPC_REL24
680 || r_type == elfcpp::R_PPC_PLTREL24)
682 && strcmp(gsym->name(), "__tls_get_addr") == 0);
683 Tls_get_addr last_tls = this->tls_get_addr_;
684 this->tls_get_addr_ = NOT_EXPECTED;
685 if (is_tls_call && last_tls != EXPECTED)
687 else if (!is_tls_call && last_tls != NOT_EXPECTED)
696 // What we're up to regarding calls to __tls_get_addr.
697 // On powerpc, the branch and link insn making a call to
698 // __tls_get_addr is marked with a relocation, R_PPC64_TLSGD,
699 // R_PPC64_TLSLD, R_PPC_TLSGD or R_PPC_TLSLD, in addition to the
700 // usual R_POWERPC_REL24 or R_PPC_PLTREL25 relocation on a call.
701 // The marker relocation always comes first, and has the same
702 // symbol as the reloc on the insn setting up the __tls_get_addr
703 // argument. This ties the arg setup insn with the call insn,
704 // allowing ld to safely optimize away the call. We check that
705 // every call to __tls_get_addr has a marker relocation, and that
706 // every marker relocation is on a call to __tls_get_addr.
707 Tls_get_addr tls_get_addr_;
708 // Info about the last reloc for error message.
709 const Relocate_info<size, big_endian>* relinfo_;
714 // The class which scans relocations.
715 class Scan : protected Track_tls
718 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
721 : Track_tls(), issued_non_pic_error_(false)
725 get_reference_flags(unsigned int r_type);
728 local(Symbol_table* symtab, Layout* layout, Target_powerpc* target,
729 Sized_relobj_file<size, big_endian>* object,
730 unsigned int data_shndx,
731 Output_section* output_section,
732 const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type,
733 const elfcpp::Sym<size, big_endian>& lsym,
737 global(Symbol_table* symtab, Layout* layout, Target_powerpc* target,
738 Sized_relobj_file<size, big_endian>* object,
739 unsigned int data_shndx,
740 Output_section* output_section,
741 const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type,
745 local_reloc_may_be_function_pointer(Symbol_table* , Layout* ,
747 Sized_relobj_file<size, big_endian>* ,
750 const elfcpp::Rela<size, big_endian>& ,
752 const elfcpp::Sym<size, big_endian>&)
756 global_reloc_may_be_function_pointer(Symbol_table* , Layout* ,
758 Sized_relobj_file<size, big_endian>* ,
761 const elfcpp::Rela<size,
763 unsigned int , Symbol*)
768 unsupported_reloc_local(Sized_relobj_file<size, big_endian>*,
769 unsigned int r_type);
772 unsupported_reloc_global(Sized_relobj_file<size, big_endian>*,
773 unsigned int r_type, Symbol*);
776 generate_tls_call(Symbol_table* symtab, Layout* layout,
777 Target_powerpc* target);
780 check_non_pic(Relobj*, unsigned int r_type);
783 reloc_needs_plt_for_ifunc(Sized_relobj_file<size, big_endian>* object,
784 unsigned int r_type);
786 // Whether we have issued an error about a non-PIC compilation.
787 bool issued_non_pic_error_;
791 symval_for_branch(Address value, const Sized_symbol<size>* gsym,
792 Powerpc_relobj<size, big_endian>* object,
793 unsigned int *dest_shndx);
795 // The class which implements relocation.
796 class Relocate : protected Track_tls
799 // Use 'at' branch hints when true, 'y' when false.
800 // FIXME maybe: set this with an option.
801 static const bool is_isa_v2 = true;
807 // Do a relocation. Return false if the caller should not issue
808 // any warnings about this relocation.
810 relocate(const Relocate_info<size, big_endian>*, Target_powerpc*,
811 Output_section*, size_t relnum,
812 const elfcpp::Rela<size, big_endian>&,
813 unsigned int r_type, const Sized_symbol<size>*,
814 const Symbol_value<size>*,
816 typename elfcpp::Elf_types<size>::Elf_Addr,
820 class Relocate_comdat_behavior
823 // Decide what the linker should do for relocations that refer to
824 // discarded comdat sections.
825 inline Comdat_behavior
826 get(const char* name)
828 gold::Default_comdat_behavior default_behavior;
829 Comdat_behavior ret = default_behavior.get(name);
830 if (ret == CB_WARNING)
833 && (strcmp(name, ".fixup") == 0
834 || strcmp(name, ".got2") == 0))
837 && (strcmp(name, ".opd") == 0
838 || strcmp(name, ".toc") == 0
839 || strcmp(name, ".toc1") == 0))
846 // A class which returns the size required for a relocation type,
847 // used while scanning relocs during a relocatable link.
848 class Relocatable_size_for_reloc
852 get_size_for_reloc(unsigned int, Relobj*)
859 // Optimize the TLS relocation type based on what we know about the
860 // symbol. IS_FINAL is true if the final address of this symbol is
861 // known at link time.
863 tls::Tls_optimization
864 optimize_tls_gd(bool is_final)
866 // If we are generating a shared library, then we can't do anything
868 if (parameters->options().shared())
869 return tls::TLSOPT_NONE;
872 return tls::TLSOPT_TO_IE;
873 return tls::TLSOPT_TO_LE;
876 tls::Tls_optimization
879 if (parameters->options().shared())
880 return tls::TLSOPT_NONE;
882 return tls::TLSOPT_TO_LE;
885 tls::Tls_optimization
886 optimize_tls_ie(bool is_final)
888 if (!is_final || parameters->options().shared())
889 return tls::TLSOPT_NONE;
891 return tls::TLSOPT_TO_LE;
896 make_glink_section(Layout*);
898 // Create the PLT section.
900 make_plt_section(Symbol_table*, Layout*);
903 make_iplt_section(Symbol_table*, Layout*);
906 make_brlt_section(Layout*);
908 // Create a PLT entry for a global symbol.
910 make_plt_entry(Symbol_table*, Layout*, Symbol*);
912 // Create a PLT entry for a local IFUNC symbol.
914 make_local_ifunc_plt_entry(Symbol_table*, Layout*,
915 Sized_relobj_file<size, big_endian>*,
919 // Create a GOT entry for local dynamic __tls_get_addr.
921 tlsld_got_offset(Symbol_table* symtab, Layout* layout,
922 Sized_relobj_file<size, big_endian>* object);
925 tlsld_got_offset() const
927 return this->tlsld_got_offset_;
930 // Get the dynamic reloc section, creating it if necessary.
932 rela_dyn_section(Layout*);
934 // Copy a relocation against a global symbol.
936 copy_reloc(Symbol_table* symtab, Layout* layout,
937 Sized_relobj_file<size, big_endian>* object,
938 unsigned int shndx, Output_section* output_section,
939 Symbol* sym, const elfcpp::Rela<size, big_endian>& reloc)
941 this->copy_relocs_.copy_reloc(symtab, layout,
942 symtab->get_sized_symbol<size>(sym),
943 object, shndx, output_section,
944 reloc, this->rela_dyn_section(layout));
947 // Look over all the input sections, deciding where to place stub.
949 group_sections(Layout*, const Task*);
951 // Sort output sections by address.
955 operator()(const Output_section* sec1, const Output_section* sec2)
956 { return sec1->address() < sec2->address(); }
962 Branch_info(Powerpc_relobj<size, big_endian>* ppc_object,
963 unsigned int data_shndx,
968 : object_(ppc_object), shndx_(data_shndx), offset_(r_offset),
969 r_type_(r_type), r_sym_(r_sym), addend_(addend)
975 // If this branch needs a plt call stub, or a long branch stub, make one.
977 make_stub(Stub_table<size, big_endian>*,
978 Stub_table<size, big_endian>*,
979 Symbol_table*) const;
982 // The branch location..
983 Powerpc_relobj<size, big_endian>* object_;
986 // ..and the branch type and destination.
987 unsigned int r_type_;
992 // Information about this specific target which we pass to the
993 // general Target structure.
994 static Target::Target_info powerpc_info;
996 // The types of GOT entries needed for this platform.
997 // These values are exposed to the ABI in an incremental link.
998 // Do not renumber existing values without changing the version
999 // number of the .gnu_incremental_inputs section.
1003 GOT_TYPE_TLSGD, // double entry for @got@tlsgd
1004 GOT_TYPE_DTPREL, // entry for @got@dtprel
1005 GOT_TYPE_TPREL // entry for @got@tprel
1009 Output_data_got_powerpc<size, big_endian>* got_;
1011 Output_data_plt_powerpc<size, big_endian>* plt_;
1012 // The IPLT section.
1013 Output_data_plt_powerpc<size, big_endian>* iplt_;
1014 // Section holding long branch destinations.
1015 Output_data_brlt_powerpc<size, big_endian>* brlt_section_;
1016 // The .glink section.
1017 Output_data_glink<size, big_endian>* glink_;
1018 // The dynamic reloc section.
1019 Reloc_section* rela_dyn_;
1020 // Relocs saved to avoid a COPY reloc.
1021 Copy_relocs<elfcpp::SHT_RELA, size, big_endian> copy_relocs_;
1022 // Space for variables copied with a COPY reloc.
1023 Output_data_space* dynbss_;
1024 // Offset of the GOT entry for local dynamic __tls_get_addr calls.
1025 unsigned int tlsld_got_offset_;
1027 Stub_tables stub_tables_;
1028 typedef Unordered_map<Address, unsigned int> Branch_lookup_table;
1029 Branch_lookup_table branch_lookup_table_;
1031 typedef std::vector<Branch_info> Branches;
1032 Branches branch_info_;
1034 bool plt_thread_safe_;
1038 Target::Target_info Target_powerpc<32, true>::powerpc_info =
1041 true, // is_big_endian
1042 elfcpp::EM_PPC, // machine_code
1043 false, // has_make_symbol
1044 false, // has_resolve
1045 false, // has_code_fill
1046 true, // is_default_stack_executable
1047 false, // can_icf_inline_merge_sections
1049 "/usr/lib/ld.so.1", // dynamic_linker
1050 0x10000000, // default_text_segment_address
1051 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1052 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1053 false, // isolate_execinstr
1055 elfcpp::SHN_UNDEF, // small_common_shndx
1056 elfcpp::SHN_UNDEF, // large_common_shndx
1057 0, // small_common_section_flags
1058 0, // large_common_section_flags
1059 NULL, // attributes_section
1060 NULL // attributes_vendor
1064 Target::Target_info Target_powerpc<32, false>::powerpc_info =
1067 false, // is_big_endian
1068 elfcpp::EM_PPC, // machine_code
1069 false, // has_make_symbol
1070 false, // has_resolve
1071 false, // has_code_fill
1072 true, // is_default_stack_executable
1073 false, // can_icf_inline_merge_sections
1075 "/usr/lib/ld.so.1", // dynamic_linker
1076 0x10000000, // default_text_segment_address
1077 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1078 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1079 false, // isolate_execinstr
1081 elfcpp::SHN_UNDEF, // small_common_shndx
1082 elfcpp::SHN_UNDEF, // large_common_shndx
1083 0, // small_common_section_flags
1084 0, // large_common_section_flags
1085 NULL, // attributes_section
1086 NULL // attributes_vendor
1090 Target::Target_info Target_powerpc<64, true>::powerpc_info =
1093 true, // is_big_endian
1094 elfcpp::EM_PPC64, // machine_code
1095 false, // has_make_symbol
1096 false, // has_resolve
1097 false, // has_code_fill
1098 true, // is_default_stack_executable
1099 false, // can_icf_inline_merge_sections
1101 "/usr/lib/ld.so.1", // dynamic_linker
1102 0x10000000, // default_text_segment_address
1103 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1104 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1105 false, // isolate_execinstr
1107 elfcpp::SHN_UNDEF, // small_common_shndx
1108 elfcpp::SHN_UNDEF, // large_common_shndx
1109 0, // small_common_section_flags
1110 0, // large_common_section_flags
1111 NULL, // attributes_section
1112 NULL // attributes_vendor
1116 Target::Target_info Target_powerpc<64, false>::powerpc_info =
1119 false, // is_big_endian
1120 elfcpp::EM_PPC64, // machine_code
1121 false, // has_make_symbol
1122 false, // has_resolve
1123 false, // has_code_fill
1124 true, // is_default_stack_executable
1125 false, // can_icf_inline_merge_sections
1127 "/usr/lib/ld.so.1", // dynamic_linker
1128 0x10000000, // default_text_segment_address
1129 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1130 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1131 false, // isolate_execinstr
1133 elfcpp::SHN_UNDEF, // small_common_shndx
1134 elfcpp::SHN_UNDEF, // large_common_shndx
1135 0, // small_common_section_flags
1136 0, // large_common_section_flags
1137 NULL, // attributes_section
1138 NULL // attributes_vendor
1142 is_branch_reloc(unsigned int r_type)
1144 return (r_type == elfcpp::R_POWERPC_REL24
1145 || r_type == elfcpp::R_PPC_PLTREL24
1146 || r_type == elfcpp::R_PPC_LOCAL24PC
1147 || r_type == elfcpp::R_POWERPC_REL14
1148 || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN
1149 || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN
1150 || r_type == elfcpp::R_POWERPC_ADDR24
1151 || r_type == elfcpp::R_POWERPC_ADDR14
1152 || r_type == elfcpp::R_POWERPC_ADDR14_BRTAKEN
1153 || r_type == elfcpp::R_POWERPC_ADDR14_BRNTAKEN);
1156 // If INSN is an opcode that may be used with an @tls operand, return
1157 // the transformed insn for TLS optimisation, otherwise return 0. If
1158 // REG is non-zero only match an insn with RB or RA equal to REG.
1160 at_tls_transform(uint32_t insn, unsigned int reg)
1162 if ((insn & (0x3f << 26)) != 31 << 26)
1166 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
1167 rtra = insn & ((1 << 26) - (1 << 16));
1168 else if (((insn >> 16) & 0x1f) == reg)
1169 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
1173 if ((insn & (0x3ff << 1)) == 266 << 1)
1176 else if ((insn & (0x1f << 1)) == 23 << 1
1177 && ((insn & (0x1f << 6)) < 14 << 6
1178 || ((insn & (0x1f << 6)) >= 16 << 6
1179 && (insn & (0x1f << 6)) < 24 << 6)))
1180 // load and store indexed -> dform
1181 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
1182 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
1183 // ldx, ldux, stdx, stdux -> ld, ldu, std, stdu
1184 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
1185 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
1187 insn = (58 << 26) | 2;
1194 // Modified version of symtab.h class Symbol member
1195 // Given a direct absolute or pc-relative static relocation against
1196 // the global symbol, this function returns whether a dynamic relocation
1201 needs_dynamic_reloc(const Symbol* gsym, int flags)
1203 // No dynamic relocations in a static link!
1204 if (parameters->doing_static_link())
1207 // A reference to an undefined symbol from an executable should be
1208 // statically resolved to 0, and does not need a dynamic relocation.
1209 // This matches gnu ld behavior.
1210 if (gsym->is_undefined() && !parameters->options().shared())
1213 // A reference to an absolute symbol does not need a dynamic relocation.
1214 if (gsym->is_absolute())
1217 // An absolute reference within a position-independent output file
1218 // will need a dynamic relocation.
1219 if ((flags & Symbol::ABSOLUTE_REF)
1220 && parameters->options().output_is_position_independent())
1223 // A function call that can branch to a local PLT entry does not need
1224 // a dynamic relocation.
1225 if ((flags & Symbol::FUNCTION_CALL) && gsym->has_plt_offset())
1228 // A reference to any PLT entry in a non-position-independent executable
1229 // does not need a dynamic relocation.
1230 // Except due to having function descriptors on powerpc64 we don't define
1231 // functions to their plt code in an executable, so this doesn't apply.
1233 && !parameters->options().output_is_position_independent()
1234 && gsym->has_plt_offset())
1237 // A reference to a symbol defined in a dynamic object or to a
1238 // symbol that is preemptible will need a dynamic relocation.
1239 if (gsym->is_from_dynobj()
1240 || gsym->is_undefined()
1241 || gsym->is_preemptible())
1244 // For all other cases, return FALSE.
1248 // Modified version of symtab.h class Symbol member
1249 // Whether we should use the PLT offset associated with a symbol for
1250 // a relocation. FLAGS is a set of Reference_flags.
1254 use_plt_offset(const Symbol* gsym, int flags)
1256 // If the symbol doesn't have a PLT offset, then naturally we
1257 // don't want to use it.
1258 if (!gsym->has_plt_offset())
1261 // For a STT_GNU_IFUNC symbol we always have to use the PLT entry.
1262 if (gsym->type() == elfcpp::STT_GNU_IFUNC)
1265 // If we are going to generate a dynamic relocation, then we will
1266 // wind up using that, so no need to use the PLT entry.
1267 if (needs_dynamic_reloc<size>(gsym, flags))
1270 // If the symbol is from a dynamic object, we need to use the PLT
1272 if (gsym->is_from_dynobj())
1275 // If we are generating a shared object, and this symbol is
1276 // undefined or preemptible, we need to use the PLT entry.
1277 if (parameters->options().shared()
1278 && (gsym->is_undefined() || gsym->is_preemptible()))
1281 // If this is a call to a weak undefined symbol, we need to use
1282 // the PLT entry; the symbol may be defined by a library loaded
1284 if ((flags & Symbol::FUNCTION_CALL) && gsym->is_weak_undefined())
1287 // Otherwise we can use the regular definition.
1291 template<int size, bool big_endian>
1292 class Powerpc_relocate_functions
1309 typedef Powerpc_relocate_functions<size, big_endian> This;
1310 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
1312 template<int valsize>
1314 has_overflow_signed(Address value)
1316 // limit = 1 << (valsize - 1) without shift count exceeding size of type
1317 Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1);
1318 limit <<= ((valsize - 1) >> 1);
1319 limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1));
1320 return value + limit > (limit << 1) - 1;
1323 template<int valsize>
1325 has_overflow_bitfield(Address value)
1327 Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1);
1328 limit <<= ((valsize - 1) >> 1);
1329 limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1));
1330 return value > (limit << 1) - 1 && value + limit > (limit << 1) - 1;
1333 template<int valsize>
1334 static inline Status
1335 overflowed(Address value, Overflow_check overflow)
1337 if (overflow == CHECK_SIGNED)
1339 if (has_overflow_signed<valsize>(value))
1340 return STATUS_OVERFLOW;
1342 else if (overflow == CHECK_BITFIELD)
1344 if (has_overflow_bitfield<valsize>(value))
1345 return STATUS_OVERFLOW;
1350 // Do a simple RELA relocation
1351 template<int valsize>
1352 static inline Status
1353 rela(unsigned char* view, Address value, Overflow_check overflow)
1355 typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype;
1356 Valtype* wv = reinterpret_cast<Valtype*>(view);
1357 elfcpp::Swap<valsize, big_endian>::writeval(wv, value);
1358 return overflowed<valsize>(value, overflow);
1361 template<int valsize>
1362 static inline Status
1363 rela(unsigned char* view,
1364 unsigned int right_shift,
1365 typename elfcpp::Valtype_base<valsize>::Valtype dst_mask,
1367 Overflow_check overflow)
1369 typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype;
1370 Valtype* wv = reinterpret_cast<Valtype*>(view);
1371 Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv);
1372 Valtype reloc = value >> right_shift;
1375 elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc);
1376 return overflowed<valsize>(value >> right_shift, overflow);
1379 // Do a simple RELA relocation, unaligned.
1380 template<int valsize>
1381 static inline Status
1382 rela_ua(unsigned char* view, Address value, Overflow_check overflow)
1384 elfcpp::Swap_unaligned<valsize, big_endian>::writeval(view, value);
1385 return overflowed<valsize>(value, overflow);
1388 template<int valsize>
1389 static inline Status
1390 rela_ua(unsigned char* view,
1391 unsigned int right_shift,
1392 typename elfcpp::Valtype_base<valsize>::Valtype dst_mask,
1394 Overflow_check overflow)
1396 typedef typename elfcpp::Swap_unaligned<valsize, big_endian>::Valtype
1398 Valtype val = elfcpp::Swap<valsize, big_endian>::readval(view);
1399 Valtype reloc = value >> right_shift;
1402 elfcpp::Swap_unaligned<valsize, big_endian>::writeval(view, val | reloc);
1403 return overflowed<valsize>(value >> right_shift, overflow);
1407 // R_PPC64_ADDR64: (Symbol + Addend)
1409 addr64(unsigned char* view, Address value)
1410 { This::template rela<64>(view, value, CHECK_NONE); }
1412 // R_PPC64_UADDR64: (Symbol + Addend) unaligned
1414 addr64_u(unsigned char* view, Address value)
1415 { This::template rela_ua<64>(view, value, CHECK_NONE); }
1417 // R_POWERPC_ADDR32: (Symbol + Addend)
1418 static inline Status
1419 addr32(unsigned char* view, Address value, Overflow_check overflow)
1420 { return This::template rela<32>(view, value, overflow); }
1422 // R_POWERPC_UADDR32: (Symbol + Addend) unaligned
1423 static inline Status
1424 addr32_u(unsigned char* view, Address value, Overflow_check overflow)
1425 { return This::template rela_ua<32>(view, value, overflow); }
1427 // R_POWERPC_ADDR24: (Symbol + Addend) & 0x3fffffc
1428 static inline Status
1429 addr24(unsigned char* view, Address value, Overflow_check overflow)
1431 Status stat = This::template rela<32>(view, 0, 0x03fffffc, value, overflow);
1432 if (overflow != CHECK_NONE && (value & 3) != 0)
1433 stat = STATUS_OVERFLOW;
1437 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff
1438 static inline Status
1439 addr16(unsigned char* view, Address value, Overflow_check overflow)
1440 { return This::template rela<16>(view, value, overflow); }
1442 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff, unaligned
1443 static inline Status
1444 addr16_u(unsigned char* view, Address value, Overflow_check overflow)
1445 { return This::template rela_ua<16>(view, value, overflow); }
1447 // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc
1448 static inline Status
1449 addr16_ds(unsigned char* view, Address value, Overflow_check overflow)
1451 Status stat = This::template rela<16>(view, 0, 0xfffc, value, overflow);
1452 if (overflow != CHECK_NONE && (value & 3) != 0)
1453 stat = STATUS_OVERFLOW;
1457 // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff
1459 addr16_hi(unsigned char* view, Address value)
1460 { This::template rela<16>(view, 16, 0xffff, value, CHECK_NONE); }
1462 // R_POWERPC_ADDR16_HA: ((Symbol + Addend + 0x8000) >> 16) & 0xffff
1464 addr16_ha(unsigned char* view, Address value)
1465 { This::addr16_hi(view, value + 0x8000); }
1467 // R_POWERPC_ADDR16_HIGHER: ((Symbol + Addend) >> 32) & 0xffff
1469 addr16_hi2(unsigned char* view, Address value)
1470 { This::template rela<16>(view, 32, 0xffff, value, CHECK_NONE); }
1472 // R_POWERPC_ADDR16_HIGHERA: ((Symbol + Addend + 0x8000) >> 32) & 0xffff
1474 addr16_ha2(unsigned char* view, Address value)
1475 { This::addr16_hi2(view, value + 0x8000); }
1477 // R_POWERPC_ADDR16_HIGHEST: ((Symbol + Addend) >> 48) & 0xffff
1479 addr16_hi3(unsigned char* view, Address value)
1480 { This::template rela<16>(view, 48, 0xffff, value, CHECK_NONE); }
1482 // R_POWERPC_ADDR16_HIGHESTA: ((Symbol + Addend + 0x8000) >> 48) & 0xffff
1484 addr16_ha3(unsigned char* view, Address value)
1485 { This::addr16_hi3(view, value + 0x8000); }
1487 // R_POWERPC_ADDR14: (Symbol + Addend) & 0xfffc
1488 static inline Status
1489 addr14(unsigned char* view, Address value, Overflow_check overflow)
1491 Status stat = This::template rela<32>(view, 0, 0xfffc, value, overflow);
1492 if (overflow != CHECK_NONE && (value & 3) != 0)
1493 stat = STATUS_OVERFLOW;
1498 // Stash away the index of .got2 or .opd in a relocatable object, if
1499 // such a section exists.
1501 template<int size, bool big_endian>
1503 Powerpc_relobj<size, big_endian>::do_find_special_sections(
1504 Read_symbols_data* sd)
1506 const unsigned char* const pshdrs = sd->section_headers->data();
1507 const unsigned char* namesu = sd->section_names->data();
1508 const char* names = reinterpret_cast<const char*>(namesu);
1509 section_size_type names_size = sd->section_names_size;
1510 const unsigned char* s;
1512 s = this->find_shdr(pshdrs, size == 32 ? ".got2" : ".opd",
1513 names, names_size, NULL);
1516 unsigned int ndx = (s - pshdrs) / elfcpp::Elf_sizes<size>::shdr_size;
1517 this->special_ = ndx;
1519 return Sized_relobj_file<size, big_endian>::do_find_special_sections(sd);
1522 // Examine .rela.opd to build info about function entry points.
1524 template<int size, bool big_endian>
1526 Powerpc_relobj<size, big_endian>::scan_opd_relocs(
1528 const unsigned char* prelocs,
1529 const unsigned char* plocal_syms)
1533 typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc
1535 const int reloc_size
1536 = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size;
1537 const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
1538 Address expected_off = 0;
1539 bool regular = true;
1540 unsigned int opd_ent_size = 0;
1542 for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size)
1544 Reltype reloc(prelocs);
1545 typename elfcpp::Elf_types<size>::Elf_WXword r_info
1546 = reloc.get_r_info();
1547 unsigned int r_type = elfcpp::elf_r_type<size>(r_info);
1548 if (r_type == elfcpp::R_PPC64_ADDR64)
1550 unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info);
1551 typename elfcpp::Elf_types<size>::Elf_Addr value;
1554 if (r_sym < this->local_symbol_count())
1556 typename elfcpp::Sym<size, big_endian>
1557 lsym(plocal_syms + r_sym * sym_size);
1558 shndx = lsym.get_st_shndx();
1559 shndx = this->adjust_sym_shndx(r_sym, shndx, &is_ordinary);
1560 value = lsym.get_st_value();
1563 shndx = this->symbol_section_and_value(r_sym, &value,
1565 this->set_opd_ent(reloc.get_r_offset(), shndx,
1566 value + reloc.get_r_addend());
1569 expected_off = reloc.get_r_offset();
1570 opd_ent_size = expected_off;
1572 else if (expected_off != reloc.get_r_offset())
1574 expected_off += opd_ent_size;
1576 else if (r_type == elfcpp::R_PPC64_TOC)
1578 if (expected_off - opd_ent_size + 8 != reloc.get_r_offset())
1583 gold_warning(_("%s: unexpected reloc type %u in .opd section"),
1584 this->name().c_str(), r_type);
1588 if (reloc_count <= 2)
1589 opd_ent_size = this->section_size(this->opd_shndx());
1590 if (opd_ent_size != 24 && opd_ent_size != 16)
1594 gold_warning(_("%s: .opd is not a regular array of opd entries"),
1595 this->name().c_str());
1601 template<int size, bool big_endian>
1603 Powerpc_relobj<size, big_endian>::do_read_relocs(Read_relocs_data* rd)
1605 Sized_relobj_file<size, big_endian>::do_read_relocs(rd);
1608 for (Read_relocs_data::Relocs_list::iterator p = rd->relocs.begin();
1609 p != rd->relocs.end();
1612 if (p->data_shndx == this->opd_shndx())
1614 uint64_t opd_size = this->section_size(this->opd_shndx());
1615 gold_assert(opd_size == static_cast<size_t>(opd_size));
1618 this->init_opd(opd_size);
1619 this->scan_opd_relocs(p->reloc_count, p->contents->data(),
1620 rd->local_symbols->data());
1628 // Set up some symbols.
1630 template<int size, bool big_endian>
1632 Target_powerpc<size, big_endian>::do_define_standard_symbols(
1633 Symbol_table* symtab,
1638 // Define _GLOBAL_OFFSET_TABLE_ to ensure it isn't seen as
1639 // undefined when scanning relocs (and thus requires
1640 // non-relative dynamic relocs). The proper value will be
1642 Symbol *gotsym = symtab->lookup("_GLOBAL_OFFSET_TABLE_", NULL);
1643 if (gotsym != NULL && gotsym->is_undefined())
1645 Target_powerpc<size, big_endian>* target =
1646 static_cast<Target_powerpc<size, big_endian>*>(
1647 parameters->sized_target<size, big_endian>());
1648 Output_data_got_powerpc<size, big_endian>* got
1649 = target->got_section(symtab, layout);
1650 symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL,
1651 Symbol_table::PREDEFINED,
1655 elfcpp::STV_HIDDEN, 0,
1659 // Define _SDA_BASE_ at the start of the .sdata section + 32768.
1660 Symbol *sdasym = symtab->lookup("_SDA_BASE_", NULL);
1661 if (sdasym != NULL && sdasym->is_undefined())
1663 Output_data_space* sdata = new Output_data_space(4, "** sdata");
1665 = layout->add_output_section_data(".sdata", 0,
1667 | elfcpp::SHF_WRITE,
1668 sdata, ORDER_SMALL_DATA, false);
1669 symtab->define_in_output_data("_SDA_BASE_", NULL,
1670 Symbol_table::PREDEFINED,
1671 os, 32768, 0, elfcpp::STT_OBJECT,
1672 elfcpp::STB_LOCAL, elfcpp::STV_HIDDEN,
1678 // Set up PowerPC target specific relobj.
1680 template<int size, bool big_endian>
1682 Target_powerpc<size, big_endian>::do_make_elf_object(
1683 const std::string& name,
1684 Input_file* input_file,
1685 off_t offset, const elfcpp::Ehdr<size, big_endian>& ehdr)
1687 int et = ehdr.get_e_type();
1688 // ET_EXEC files are valid input for --just-symbols/-R,
1689 // and we treat them as relocatable objects.
1690 if (et == elfcpp::ET_REL
1691 || (et == elfcpp::ET_EXEC && input_file->just_symbols()))
1693 Powerpc_relobj<size, big_endian>* obj =
1694 new Powerpc_relobj<size, big_endian>(name, input_file, offset, ehdr);
1698 else if (et == elfcpp::ET_DYN)
1700 Sized_dynobj<size, big_endian>* obj =
1701 new Sized_dynobj<size, big_endian>(name, input_file, offset, ehdr);
1707 gold_error(_("%s: unsupported ELF file type %d"), name.c_str(), et);
1712 template<int size, bool big_endian>
1713 class Output_data_got_powerpc : public Output_data_got<size, big_endian>
1716 typedef typename elfcpp::Elf_types<size>::Elf_Addr Valtype;
1717 typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Rela_dyn;
1719 Output_data_got_powerpc(Symbol_table* symtab, Layout* layout)
1720 : Output_data_got<size, big_endian>(),
1721 symtab_(symtab), layout_(layout),
1722 header_ent_cnt_(size == 32 ? 3 : 1),
1723 header_index_(size == 32 ? 0x2000 : 0)
1728 // Create a new GOT entry and return its offset.
1730 add_got_entry(Got_entry got_entry)
1732 this->reserve_ent();
1733 return Output_data_got<size, big_endian>::add_got_entry(got_entry);
1736 // Create a pair of new GOT entries and return the offset of the first.
1738 add_got_entry_pair(Got_entry got_entry_1, Got_entry got_entry_2)
1740 this->reserve_ent(2);
1741 return Output_data_got<size, big_endian>::add_got_entry_pair(got_entry_1,
1746 add_constant_pair(Valtype c1, Valtype c2)
1748 this->reserve_ent(2);
1749 unsigned int got_offset = this->add_constant(c1);
1750 this->add_constant(c2);
1754 // Offset of _GLOBAL_OFFSET_TABLE_.
1758 return this->got_offset(this->header_index_);
1761 // Offset of base used to access the GOT/TOC.
1762 // The got/toc pointer reg will be set to this value.
1764 got_base_offset(const Powerpc_relobj<size, big_endian>* object) const
1767 return this->g_o_t();
1769 return (this->output_section()->address()
1770 + object->toc_base_offset()
1774 // Ensure our GOT has a header.
1776 set_final_data_size()
1778 if (this->header_ent_cnt_ != 0)
1779 this->make_header();
1780 Output_data_got<size, big_endian>::set_final_data_size();
1783 // First word of GOT header needs some values that are not
1784 // handled by Output_data_got so poke them in here.
1785 // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase.
1787 do_write(Output_file* of)
1790 if (size == 32 && this->layout_->dynamic_data() != NULL)
1791 val = this->layout_->dynamic_section()->address();
1793 val = this->output_section()->address() + 0x8000;
1794 this->replace_constant(this->header_index_, val);
1795 Output_data_got<size, big_endian>::do_write(of);
1800 reserve_ent(unsigned int cnt = 1)
1802 if (this->header_ent_cnt_ == 0)
1804 if (this->num_entries() + cnt > this->header_index_)
1805 this->make_header();
1811 this->header_ent_cnt_ = 0;
1812 this->header_index_ = this->num_entries();
1815 Output_data_got<size, big_endian>::add_constant(0);
1816 Output_data_got<size, big_endian>::add_constant(0);
1817 Output_data_got<size, big_endian>::add_constant(0);
1819 // Define _GLOBAL_OFFSET_TABLE_ at the header
1820 Symbol *gotsym = this->symtab_->lookup("_GLOBAL_OFFSET_TABLE_", NULL);
1823 Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(gotsym);
1824 sym->set_value(this->g_o_t());
1827 this->symtab_->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL,
1828 Symbol_table::PREDEFINED,
1829 this, this->g_o_t(), 0,
1832 elfcpp::STV_HIDDEN, 0,
1836 Output_data_got<size, big_endian>::add_constant(0);
1839 // Stashed pointers.
1840 Symbol_table* symtab_;
1844 unsigned int header_ent_cnt_;
1845 // GOT header index.
1846 unsigned int header_index_;
1849 // Get the GOT section, creating it if necessary.
1851 template<int size, bool big_endian>
1852 Output_data_got_powerpc<size, big_endian>*
1853 Target_powerpc<size, big_endian>::got_section(Symbol_table* symtab,
1856 if (this->got_ == NULL)
1858 gold_assert(symtab != NULL && layout != NULL);
1861 = new Output_data_got_powerpc<size, big_endian>(symtab, layout);
1863 layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS,
1864 elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE,
1865 this->got_, ORDER_DATA, false);
1871 // Get the dynamic reloc section, creating it if necessary.
1873 template<int size, bool big_endian>
1874 typename Target_powerpc<size, big_endian>::Reloc_section*
1875 Target_powerpc<size, big_endian>::rela_dyn_section(Layout* layout)
1877 if (this->rela_dyn_ == NULL)
1879 gold_assert(layout != NULL);
1880 this->rela_dyn_ = new Reloc_section(parameters->options().combreloc());
1881 layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA,
1882 elfcpp::SHF_ALLOC, this->rela_dyn_,
1883 ORDER_DYNAMIC_RELOCS, false);
1885 return this->rela_dyn_;
1891 // Determine the stub group size. The group size is the absolute
1892 // value of the parameter --stub-group-size. If --stub-group-size
1893 // is passed a negative value, we restrict stubs to be always before
1894 // the stubbed branches.
1895 Stub_control(int32_t size)
1896 : state_(NO_GROUP), stub_group_size_(abs(size)),
1897 stub14_group_size_(abs(size)),
1898 stubs_always_before_branch_(size < 0), suppress_size_errors_(false),
1899 group_end_addr_(0), owner_(NULL), output_section_(NULL)
1901 if (stub_group_size_ == 1)
1904 if (stubs_always_before_branch_)
1906 stub_group_size_ = 0x1e00000;
1907 stub14_group_size_ = 0x7800;
1911 stub_group_size_ = 0x1c00000;
1912 stub14_group_size_ = 0x7000;
1914 suppress_size_errors_ = true;
1918 // Return true iff input section can be handled by current stub
1921 can_add_to_stub_group(Output_section* o,
1922 const Output_section::Input_section* i,
1925 const Output_section::Input_section*
1931 { return output_section_; }
1937 FINDING_STUB_SECTION,
1942 uint32_t stub_group_size_;
1943 uint32_t stub14_group_size_;
1944 bool stubs_always_before_branch_;
1945 bool suppress_size_errors_;
1946 uint64_t group_end_addr_;
1947 const Output_section::Input_section* owner_;
1948 Output_section* output_section_;
1951 // Return true iff input section can be handled by current stub/
1955 Stub_control::can_add_to_stub_group(Output_section* o,
1956 const Output_section::Input_section* i,
1960 = has14 ? this->stub14_group_size_ : this->stub_group_size_;
1961 bool whole_sec = o->order() == ORDER_INIT || o->order() == ORDER_FINI;
1963 uint64_t start_addr = o->address();
1966 // .init and .fini sections are pasted together to form a single
1967 // function. We can't be adding stubs in the middle of the function.
1968 this_size = o->data_size();
1971 start_addr += i->relobj()->output_section_offset(i->shndx());
1972 this_size = i->data_size();
1974 uint64_t end_addr = start_addr + this_size;
1975 bool toobig = this_size > group_size;
1977 if (toobig && !this->suppress_size_errors_)
1978 gold_warning(_("%s:%s exceeds group size"),
1979 i->relobj()->name().c_str(),
1980 i->relobj()->section_name(i->shndx()).c_str());
1982 if (this->state_ != HAS_STUB_SECTION
1983 && (!whole_sec || this->output_section_ != o))
1986 this->output_section_ = o;
1989 if (this->state_ == NO_GROUP)
1991 this->state_ = FINDING_STUB_SECTION;
1992 this->group_end_addr_ = end_addr;
1994 else if (this->group_end_addr_ - start_addr < group_size)
1996 // Adding this section would make the group larger than GROUP_SIZE.
1997 else if (this->state_ == FINDING_STUB_SECTION
1998 && !this->stubs_always_before_branch_
2001 // But wait, there's more! Input sections up to GROUP_SIZE
2002 // bytes before the stub table can be handled by it too.
2003 this->state_ = HAS_STUB_SECTION;
2004 this->group_end_addr_ = end_addr;
2008 this->state_ = NO_GROUP;
2014 // Look over all the input sections, deciding where to place stubs.
2016 template<int size, bool big_endian>
2018 Target_powerpc<size, big_endian>::group_sections(Layout* layout,
2021 Stub_control stub_control(parameters->options().stub_group_size());
2023 // Group input sections and insert stub table
2024 Stub_table<size, big_endian>* stub_table = NULL;
2025 Layout::Section_list section_list;
2026 layout->get_executable_sections(§ion_list);
2027 std::stable_sort(section_list.begin(), section_list.end(), Sort_sections());
2028 for (Layout::Section_list::reverse_iterator o = section_list.rbegin();
2029 o != section_list.rend();
2032 typedef Output_section::Input_section_list Input_section_list;
2033 for (Input_section_list::const_reverse_iterator i
2034 = (*o)->input_sections().rbegin();
2035 i != (*o)->input_sections().rend();
2038 if (i->is_input_section())
2040 Powerpc_relobj<size, big_endian>* ppcobj = static_cast
2041 <Powerpc_relobj<size, big_endian>*>(i->relobj());
2042 bool has14 = ppcobj->has_14bit_branch(i->shndx());
2043 if (!stub_control.can_add_to_stub_group(*o, &*i, has14))
2045 stub_table->init(stub_control.owner(),
2046 stub_control.output_section());
2049 if (stub_table == NULL)
2050 stub_table = this->new_stub_table();
2051 ppcobj->set_stub_table(i->shndx(), stub_table);
2055 if (stub_table != NULL)
2056 stub_table->init(stub_control.owner(), stub_control.output_section());
2059 // If this branch needs a plt call stub, or a long branch stub, make one.
2061 template<int size, bool big_endian>
2063 Target_powerpc<size, big_endian>::Branch_info::make_stub(
2064 Stub_table<size, big_endian>* stub_table,
2065 Stub_table<size, big_endian>* ifunc_stub_table,
2066 Symbol_table* symtab) const
2068 Symbol* sym = this->object_->global_symbol(this->r_sym_);
2069 if (sym != NULL && sym->is_forwarder())
2070 sym = symtab->resolve_forwards(sym);
2071 const Sized_symbol<size>* gsym = static_cast<const Sized_symbol<size>*>(sym);
2073 ? use_plt_offset<size>(gsym, Scan::get_reference_flags(this->r_type_))
2074 : this->object_->local_has_plt_offset(this->r_sym_))
2076 if (stub_table == NULL)
2077 stub_table = this->object_->stub_table(this->shndx_);
2078 if (stub_table == NULL)
2080 // This is a ref from a data section to an ifunc symbol.
2081 stub_table = ifunc_stub_table;
2083 gold_assert(stub_table != NULL);
2085 stub_table->add_plt_call_entry(this->object_, gsym,
2086 this->r_type_, this->addend_);
2088 stub_table->add_plt_call_entry(this->object_, this->r_sym_,
2089 this->r_type_, this->addend_);
2093 unsigned int max_branch_offset;
2094 if (this->r_type_ == elfcpp::R_POWERPC_REL14
2095 || this->r_type_ == elfcpp::R_POWERPC_REL14_BRTAKEN
2096 || this->r_type_ == elfcpp::R_POWERPC_REL14_BRNTAKEN)
2097 max_branch_offset = 1 << 15;
2098 else if (this->r_type_ == elfcpp::R_POWERPC_REL24
2099 || this->r_type_ == elfcpp::R_PPC_PLTREL24
2100 || this->r_type_ == elfcpp::R_PPC_LOCAL24PC)
2101 max_branch_offset = 1 << 25;
2104 Address from = this->object_->get_output_section_offset(this->shndx_);
2105 gold_assert(from != invalid_address);
2106 from += (this->object_->output_section(this->shndx_)->address()
2111 switch (gsym->source())
2113 case Symbol::FROM_OBJECT:
2115 Object* symobj = gsym->object();
2116 if (symobj->is_dynamic()
2117 || symobj->pluginobj() != NULL)
2120 unsigned int shndx = gsym->shndx(&is_ordinary);
2121 if (shndx == elfcpp::SHN_UNDEF)
2126 case Symbol::IS_UNDEFINED:
2132 Symbol_table::Compute_final_value_status status;
2133 to = symtab->compute_final_value<size>(gsym, &status);
2134 if (status != Symbol_table::CFVS_OK)
2139 const Symbol_value<size>* psymval
2140 = this->object_->local_symbol(this->r_sym_);
2141 Symbol_value<size> symval;
2142 typedef Sized_relobj_file<size, big_endian> ObjType;
2143 typename ObjType::Compute_final_local_value_status status
2144 = this->object_->compute_final_local_value(this->r_sym_, psymval,
2146 if (status != ObjType::CFLV_OK
2147 || !symval.has_output_value())
2149 to = symval.value(this->object_, 0);
2151 to += this->addend_;
2152 if (stub_table == NULL)
2153 stub_table = this->object_->stub_table(this->shndx_);
2154 gold_assert(stub_table != NULL);
2155 if (size == 64 && is_branch_reloc(this->r_type_))
2157 unsigned int dest_shndx;
2158 to = stub_table->targ()->symval_for_branch(to, gsym, this->object_,
2161 Address delta = to - from;
2162 if (delta + max_branch_offset >= 2 * max_branch_offset)
2164 stub_table->add_long_branch_entry(this->object_, to);
2169 // Relaxation hook. This is where we do stub generation.
2171 template<int size, bool big_endian>
2173 Target_powerpc<size, big_endian>::do_relax(int pass,
2174 const Input_objects*,
2175 Symbol_table* symtab,
2179 unsigned int prev_brlt_size = 0;
2182 bool thread_safe = parameters->options().plt_thread_safe();
2183 if (size == 64 && !parameters->options().user_set_plt_thread_safe())
2185 static const char* const thread_starter[] =
2189 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
2191 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
2192 "mq_notify", "create_timer",
2196 "GOMP_parallel_start",
2197 "GOMP_parallel_loop_static_start",
2198 "GOMP_parallel_loop_dynamic_start",
2199 "GOMP_parallel_loop_guided_start",
2200 "GOMP_parallel_loop_runtime_start",
2201 "GOMP_parallel_sections_start",
2204 if (parameters->options().shared())
2208 for (unsigned int i = 0;
2209 i < sizeof(thread_starter) / sizeof(thread_starter[0]);
2212 Symbol* sym = symtab->lookup(thread_starter[i], NULL);
2213 thread_safe = (sym != NULL
2215 && sym->in_real_elf());
2221 this->plt_thread_safe_ = thread_safe;
2222 this->group_sections(layout, task);
2225 // We need address of stub tables valid for make_stub.
2226 for (typename Stub_tables::iterator p = this->stub_tables_.begin();
2227 p != this->stub_tables_.end();
2230 const Powerpc_relobj<size, big_endian>* object
2231 = static_cast<const Powerpc_relobj<size, big_endian>*>((*p)->relobj());
2232 Address off = object->get_output_section_offset((*p)->shndx());
2233 gold_assert(off != invalid_address);
2234 Output_section* os = (*p)->output_section();
2235 (*p)->set_address_and_size(os, off);
2240 // Clear plt call stubs, long branch stubs and branch lookup table.
2241 prev_brlt_size = this->branch_lookup_table_.size();
2242 this->branch_lookup_table_.clear();
2243 for (typename Stub_tables::iterator p = this->stub_tables_.begin();
2244 p != this->stub_tables_.end();
2247 (*p)->clear_stubs();
2251 // Build all the stubs.
2252 Stub_table<size, big_endian>* ifunc_stub_table
2253 = this->stub_tables_.size() == 0 ? NULL : this->stub_tables_[0];
2254 Stub_table<size, big_endian>* one_stub_table
2255 = this->stub_tables_.size() != 1 ? NULL : ifunc_stub_table;
2256 for (typename Branches::const_iterator b = this->branch_info_.begin();
2257 b != this->branch_info_.end();
2260 b->make_stub(one_stub_table, ifunc_stub_table, symtab);
2263 // Did anything change size?
2264 unsigned int num_huge_branches = this->branch_lookup_table_.size();
2265 bool again = num_huge_branches != prev_brlt_size;
2266 if (size == 64 && num_huge_branches != 0)
2267 this->make_brlt_section(layout);
2268 if (size == 64 && again)
2269 this->brlt_section_->set_current_size(num_huge_branches);
2271 typedef Unordered_set<Output_section*> Output_sections;
2272 Output_sections os_need_update;
2273 for (typename Stub_tables::iterator p = this->stub_tables_.begin();
2274 p != this->stub_tables_.end();
2277 if ((*p)->size_update())
2280 os_need_update.insert((*p)->output_section());
2284 // Set output section offsets for all input sections in an output
2285 // section that just changed size. Anything past the stubs will
2287 for (typename Output_sections::iterator p = os_need_update.begin();
2288 p != os_need_update.end();
2291 Output_section* os = *p;
2293 typedef Output_section::Input_section_list Input_section_list;
2294 for (Input_section_list::const_iterator i = os->input_sections().begin();
2295 i != os->input_sections().end();
2298 off = align_address(off, i->addralign());
2299 if (i->is_input_section() || i->is_relaxed_input_section())
2300 i->relobj()->set_section_offset(i->shndx(), off);
2301 if (i->is_relaxed_input_section())
2303 Stub_table<size, big_endian>* stub_table
2304 = static_cast<Stub_table<size, big_endian>*>(
2305 i->relaxed_input_section());
2306 off += stub_table->set_address_and_size(os, off);
2309 off += i->data_size();
2311 // If .brlt is part of this output section, then we have just
2312 // done the offset adjustment.
2313 os->clear_section_offsets_need_adjustment();
2318 && num_huge_branches != 0
2319 && parameters->options().output_is_position_independent())
2321 // Fill in the BRLT relocs.
2322 this->brlt_section_->reset_data_size();
2323 for (typename Branch_lookup_table::const_iterator p
2324 = this->branch_lookup_table_.begin();
2325 p != this->branch_lookup_table_.end();
2328 this->brlt_section_->add_reloc(p->first, p->second);
2330 this->brlt_section_->finalize_data_size();
2335 // A class to handle the PLT data.
2337 template<int size, bool big_endian>
2338 class Output_data_plt_powerpc : public Output_section_data_build
2341 typedef Output_data_reloc<elfcpp::SHT_RELA, true,
2342 size, big_endian> Reloc_section;
2344 Output_data_plt_powerpc(Target_powerpc<size, big_endian>* targ,
2345 Reloc_section* plt_rel,
2346 unsigned int reserved_size,
2348 : Output_section_data_build(size == 32 ? 4 : 8),
2351 initial_plt_entry_size_(reserved_size),
2355 // Add an entry to the PLT.
2360 add_ifunc_entry(Symbol*);
2363 add_local_ifunc_entry(Sized_relobj_file<size, big_endian>*, unsigned int);
2365 // Return the .rela.plt section data.
2372 // Return the number of PLT entries.
2376 return ((this->current_data_size() - this->initial_plt_entry_size_)
2380 // Return the offset of the first non-reserved PLT entry.
2382 first_plt_entry_offset()
2383 { return this->initial_plt_entry_size_; }
2385 // Return the size of a PLT entry.
2387 get_plt_entry_size()
2388 { return plt_entry_size; }
2392 do_adjust_output_section(Output_section* os)
2397 // Write to a map file.
2399 do_print_to_mapfile(Mapfile* mapfile) const
2400 { mapfile->print_output_data(this, this->name_); }
2403 // The size of an entry in the PLT.
2404 static const int plt_entry_size = size == 32 ? 4 : 24;
2406 // Write out the PLT data.
2408 do_write(Output_file*);
2410 // The reloc section.
2411 Reloc_section* rel_;
2412 // Allows access to .glink for do_write.
2413 Target_powerpc<size, big_endian>* targ_;
2414 // The size of the first reserved entry.
2415 int initial_plt_entry_size_;
2416 // What to report in map file.
2420 // Add an entry to the PLT.
2422 template<int size, bool big_endian>
2424 Output_data_plt_powerpc<size, big_endian>::add_entry(Symbol* gsym)
2426 if (!gsym->has_plt_offset())
2428 section_size_type off = this->current_data_size();
2430 off += this->first_plt_entry_offset();
2431 gsym->set_plt_offset(off);
2432 gsym->set_needs_dynsym_entry();
2433 unsigned int dynrel = elfcpp::R_POWERPC_JMP_SLOT;
2434 this->rel_->add_global(gsym, dynrel, this, off, 0);
2435 off += plt_entry_size;
2436 this->set_current_data_size(off);
2440 // Add an entry for a global ifunc symbol that resolves locally, to the IPLT.
2442 template<int size, bool big_endian>
2444 Output_data_plt_powerpc<size, big_endian>::add_ifunc_entry(Symbol* gsym)
2446 if (!gsym->has_plt_offset())
2448 section_size_type off = this->current_data_size();
2449 gsym->set_plt_offset(off);
2450 unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE;
2452 dynrel = elfcpp::R_PPC64_JMP_IREL;
2453 this->rel_->add_symbolless_global_addend(gsym, dynrel, this, off, 0);
2454 off += plt_entry_size;
2455 this->set_current_data_size(off);
2459 // Add an entry for a local ifunc symbol to the IPLT.
2461 template<int size, bool big_endian>
2463 Output_data_plt_powerpc<size, big_endian>::add_local_ifunc_entry(
2464 Sized_relobj_file<size, big_endian>* relobj,
2465 unsigned int local_sym_index)
2467 if (!relobj->local_has_plt_offset(local_sym_index))
2469 section_size_type off = this->current_data_size();
2470 relobj->set_local_plt_offset(local_sym_index, off);
2471 unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE;
2473 dynrel = elfcpp::R_PPC64_JMP_IREL;
2474 this->rel_->add_symbolless_local_addend(relobj, local_sym_index, dynrel,
2476 off += plt_entry_size;
2477 this->set_current_data_size(off);
2481 static const uint32_t add_0_11_11 = 0x7c0b5a14;
2482 static const uint32_t add_2_2_11 = 0x7c425a14;
2483 static const uint32_t add_3_3_2 = 0x7c631214;
2484 static const uint32_t add_3_3_13 = 0x7c636a14;
2485 static const uint32_t add_11_0_11 = 0x7d605a14;
2486 static const uint32_t add_12_2_11 = 0x7d825a14;
2487 static const uint32_t add_12_12_11 = 0x7d8c5a14;
2488 static const uint32_t addi_11_11 = 0x396b0000;
2489 static const uint32_t addi_12_12 = 0x398c0000;
2490 static const uint32_t addi_2_2 = 0x38420000;
2491 static const uint32_t addi_3_2 = 0x38620000;
2492 static const uint32_t addi_3_3 = 0x38630000;
2493 static const uint32_t addis_0_2 = 0x3c020000;
2494 static const uint32_t addis_0_13 = 0x3c0d0000;
2495 static const uint32_t addis_11_11 = 0x3d6b0000;
2496 static const uint32_t addis_11_30 = 0x3d7e0000;
2497 static const uint32_t addis_12_12 = 0x3d8c0000;
2498 static const uint32_t addis_12_2 = 0x3d820000;
2499 static const uint32_t addis_3_2 = 0x3c620000;
2500 static const uint32_t addis_3_13 = 0x3c6d0000;
2501 static const uint32_t b = 0x48000000;
2502 static const uint32_t bcl_20_31 = 0x429f0005;
2503 static const uint32_t bctr = 0x4e800420;
2504 static const uint32_t blr = 0x4e800020;
2505 static const uint32_t blrl = 0x4e800021;
2506 static const uint32_t bnectr_p4 = 0x4ce20420;
2507 static const uint32_t cmpldi_2_0 = 0x28220000;
2508 static const uint32_t cror_15_15_15 = 0x4def7b82;
2509 static const uint32_t cror_31_31_31 = 0x4ffffb82;
2510 static const uint32_t ld_0_1 = 0xe8010000;
2511 static const uint32_t ld_0_12 = 0xe80c0000;
2512 static const uint32_t ld_11_12 = 0xe96c0000;
2513 static const uint32_t ld_11_2 = 0xe9620000;
2514 static const uint32_t ld_2_1 = 0xe8410000;
2515 static const uint32_t ld_2_11 = 0xe84b0000;
2516 static const uint32_t ld_2_12 = 0xe84c0000;
2517 static const uint32_t ld_2_2 = 0xe8420000;
2518 static const uint32_t lfd_0_1 = 0xc8010000;
2519 static const uint32_t li_0_0 = 0x38000000;
2520 static const uint32_t li_12_0 = 0x39800000;
2521 static const uint32_t lis_0_0 = 0x3c000000;
2522 static const uint32_t lis_11 = 0x3d600000;
2523 static const uint32_t lis_12 = 0x3d800000;
2524 static const uint32_t lwz_0_12 = 0x800c0000;
2525 static const uint32_t lwz_11_11 = 0x816b0000;
2526 static const uint32_t lwz_11_30 = 0x817e0000;
2527 static const uint32_t lwz_12_12 = 0x818c0000;
2528 static const uint32_t lwzu_0_12 = 0x840c0000;
2529 static const uint32_t lvx_0_12_0 = 0x7c0c00ce;
2530 static const uint32_t mflr_0 = 0x7c0802a6;
2531 static const uint32_t mflr_11 = 0x7d6802a6;
2532 static const uint32_t mflr_12 = 0x7d8802a6;
2533 static const uint32_t mtctr_0 = 0x7c0903a6;
2534 static const uint32_t mtctr_11 = 0x7d6903a6;
2535 static const uint32_t mtctr_12 = 0x7d8903a6;
2536 static const uint32_t mtlr_0 = 0x7c0803a6;
2537 static const uint32_t mtlr_12 = 0x7d8803a6;
2538 static const uint32_t nop = 0x60000000;
2539 static const uint32_t ori_0_0_0 = 0x60000000;
2540 static const uint32_t std_0_1 = 0xf8010000;
2541 static const uint32_t std_0_12 = 0xf80c0000;
2542 static const uint32_t std_2_1 = 0xf8410000;
2543 static const uint32_t stfd_0_1 = 0xd8010000;
2544 static const uint32_t stvx_0_12_0 = 0x7c0c01ce;
2545 static const uint32_t sub_11_11_12 = 0x7d6c5850;
2546 static const uint32_t xor_11_11_11 = 0x7d6b5a78;
2548 // Write out the PLT.
2550 template<int size, bool big_endian>
2552 Output_data_plt_powerpc<size, big_endian>::do_write(Output_file* of)
2556 const section_size_type offset = this->offset();
2557 const section_size_type oview_size
2558 = convert_to_section_size_type(this->data_size());
2559 unsigned char* const oview = of->get_output_view(offset, oview_size);
2560 unsigned char* pov = oview;
2561 unsigned char* endpov = oview + oview_size;
2563 // The address of the .glink branch table
2564 const Output_data_glink<size, big_endian>* glink
2565 = this->targ_->glink_section();
2566 elfcpp::Elf_types<32>::Elf_Addr branch_tab = glink->address();
2568 while (pov < endpov)
2570 elfcpp::Swap<32, big_endian>::writeval(pov, branch_tab);
2575 of->write_output_view(offset, oview_size, oview);
2579 // Create the PLT section.
2581 template<int size, bool big_endian>
2583 Target_powerpc<size, big_endian>::make_plt_section(Symbol_table* symtab,
2586 if (this->plt_ == NULL)
2588 if (this->got_ == NULL)
2589 this->got_section(symtab, layout);
2591 if (this->glink_ == NULL)
2592 make_glink_section(layout);
2594 // Ensure that .rela.dyn always appears before .rela.plt This is
2595 // necessary due to how, on PowerPC and some other targets, .rela.dyn
2596 // needs to include .rela.plt in it's range.
2597 this->rela_dyn_section(layout);
2599 Reloc_section* plt_rel = new Reloc_section(false);
2600 layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA,
2601 elfcpp::SHF_ALLOC, plt_rel,
2602 ORDER_DYNAMIC_PLT_RELOCS, false);
2604 = new Output_data_plt_powerpc<size, big_endian>(this, plt_rel,
2605 size == 32 ? 0 : 24,
2607 layout->add_output_section_data(".plt",
2609 ? elfcpp::SHT_PROGBITS
2610 : elfcpp::SHT_NOBITS),
2611 elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE,
2620 // Create the IPLT section.
2622 template<int size, bool big_endian>
2624 Target_powerpc<size, big_endian>::make_iplt_section(Symbol_table* symtab,
2627 if (this->iplt_ == NULL)
2629 this->make_plt_section(symtab, layout);
2631 Reloc_section* iplt_rel = new Reloc_section(false);
2632 this->rela_dyn_->output_section()->add_output_section_data(iplt_rel);
2634 = new Output_data_plt_powerpc<size, big_endian>(this, iplt_rel,
2636 this->plt_->output_section()->add_output_section_data(this->iplt_);
2640 // A section for huge long branch addresses, similar to plt section.
2642 template<int size, bool big_endian>
2643 class Output_data_brlt_powerpc : public Output_section_data_build
2646 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
2647 typedef Output_data_reloc<elfcpp::SHT_RELA, true,
2648 size, big_endian> Reloc_section;
2650 Output_data_brlt_powerpc(Target_powerpc<size, big_endian>* targ,
2651 Reloc_section* brlt_rel)
2652 : Output_section_data_build(size == 32 ? 4 : 8),
2657 // Add a reloc for an entry in the BRLT.
2659 add_reloc(Address to, unsigned int off)
2660 { this->rel_->add_relative(elfcpp::R_POWERPC_RELATIVE, this, off, to); }
2662 // Update section and reloc section size.
2664 set_current_size(unsigned int num_branches)
2666 this->reset_address_and_file_offset();
2667 this->set_current_data_size(num_branches * 16);
2668 this->finalize_data_size();
2669 Output_section* os = this->output_section();
2670 os->set_section_offsets_need_adjustment();
2671 if (this->rel_ != NULL)
2673 unsigned int reloc_size
2674 = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size;
2675 this->rel_->reset_address_and_file_offset();
2676 this->rel_->set_current_data_size(num_branches * reloc_size);
2677 this->rel_->finalize_data_size();
2678 Output_section* os = this->rel_->output_section();
2679 os->set_section_offsets_need_adjustment();
2685 do_adjust_output_section(Output_section* os)
2690 // Write to a map file.
2692 do_print_to_mapfile(Mapfile* mapfile) const
2693 { mapfile->print_output_data(this, "** BRLT"); }
2696 // Write out the BRLT data.
2698 do_write(Output_file*);
2700 // The reloc section.
2701 Reloc_section* rel_;
2702 Target_powerpc<size, big_endian>* targ_;
2705 // Make the branch lookup table section.
2707 template<int size, bool big_endian>
2709 Target_powerpc<size, big_endian>::make_brlt_section(Layout* layout)
2711 if (size == 64 && this->brlt_section_ == NULL)
2713 Reloc_section* brlt_rel = NULL;
2714 bool is_pic = parameters->options().output_is_position_independent();
2717 // When PIC we can't fill in .brlt (like .plt it can be a
2718 // bss style section) but must initialise at runtime via
2719 // dynamic relocats.
2720 this->rela_dyn_section(layout);
2721 brlt_rel = new Reloc_section(false);
2722 this->rela_dyn_->output_section()->add_output_section_data(brlt_rel);
2725 = new Output_data_brlt_powerpc<size, big_endian>(this, brlt_rel);
2726 if (this->plt_ && is_pic)
2727 this->plt_->output_section()
2728 ->add_output_section_data(this->brlt_section_);
2730 layout->add_output_section_data(".brlt",
2731 (is_pic ? elfcpp::SHT_NOBITS
2732 : elfcpp::SHT_PROGBITS),
2733 elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE,
2734 this->brlt_section_,
2735 (is_pic ? ORDER_SMALL_BSS
2736 : ORDER_SMALL_DATA),
2741 // Write out .brlt when non-PIC.
2743 template<int size, bool big_endian>
2745 Output_data_brlt_powerpc<size, big_endian>::do_write(Output_file* of)
2747 if (size == 64 && !parameters->options().output_is_position_independent())
2749 const section_size_type offset = this->offset();
2750 const section_size_type oview_size
2751 = convert_to_section_size_type(this->data_size());
2752 unsigned char* const oview = of->get_output_view(offset, oview_size);
2754 this->targ_->write_branch_lookup_table(oview);
2755 of->write_output_view(offset, oview_size, oview);
2759 static inline uint32_t
2765 static inline uint32_t
2771 static inline uint32_t
2774 return hi(a + 0x8000);
2777 template<bool big_endian>
2779 write_insn(unsigned char* p, uint32_t v)
2781 elfcpp::Swap<32, big_endian>::writeval(p, v);
2784 // Stub_table holds information about plt and long branch stubs.
2785 // Stubs are built in an area following some input section determined
2786 // by group_sections(). This input section is converted to a relaxed
2787 // input section allowing it to be resized to accommodate the stubs
2789 template<int size, bool big_endian>
2790 class Stub_table : public Output_relaxed_input_section
2793 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
2794 static const Address invalid_address = static_cast<Address>(0) - 1;
2796 Stub_table(Target_powerpc<size, big_endian>* targ)
2797 : Output_relaxed_input_section(NULL, 0, 0),
2798 targ_(targ), plt_call_stubs_(), long_branch_stubs_(),
2799 orig_data_size_(0), plt_size_(0), last_plt_size_(0),
2800 branch_size_(0), last_branch_size_(0)
2803 // Delayed Output_relaxed_input_section init.
2805 init(const Output_section::Input_section*, Output_section*);
2807 // Add a plt call stub.
2809 add_plt_call_entry(const Sized_relobj_file<size, big_endian>*,
2815 add_plt_call_entry(const Sized_relobj_file<size, big_endian>*,
2820 // Find a given plt call stub.
2822 find_plt_call_entry(const Symbol*) const;
2825 find_plt_call_entry(const Sized_relobj_file<size, big_endian>*,
2826 unsigned int) const;
2829 find_plt_call_entry(const Sized_relobj_file<size, big_endian>*,
2835 find_plt_call_entry(const Sized_relobj_file<size, big_endian>*,
2840 // Add a long branch stub.
2842 add_long_branch_entry(const Powerpc_relobj<size, big_endian>*, Address);
2845 find_long_branch_entry(const Powerpc_relobj<size, big_endian>*, Address);
2850 this->plt_call_stubs_.clear();
2851 this->plt_size_ = 0;
2852 this->long_branch_stubs_.clear();
2853 this->branch_size_ = 0;
2857 set_address_and_size(const Output_section* os, Address off)
2859 Address start_off = off;
2860 off += this->orig_data_size_;
2861 Address my_size = this->plt_size_ + this->branch_size_;
2863 off = align_address(off, this->stub_align());
2864 // Include original section size and alignment padding in size
2865 my_size += off - start_off;
2866 this->reset_address_and_file_offset();
2867 this->set_current_data_size(my_size);
2868 this->set_address_and_file_offset(os->address() + start_off,
2869 os->offset() + start_off);
2876 return align_address(this->address() + this->orig_data_size_,
2877 this->stub_align());
2883 return align_address(this->offset() + this->orig_data_size_,
2884 this->stub_align());
2889 { return this->plt_size_; }
2894 Output_section* os = this->output_section();
2895 if (os->addralign() < this->stub_align())
2897 os->set_addralign(this->stub_align());
2898 // FIXME: get rid of the insane checkpointing.
2899 // We can't increase alignment of the input section to which
2900 // stubs are attached; The input section may be .init which
2901 // is pasted together with other .init sections to form a
2902 // function. Aligning might insert zero padding resulting in
2903 // sigill. However we do need to increase alignment of the
2904 // output section so that the align_address() on offset in
2905 // set_address_and_size() adds the same padding as the
2906 // align_address() on address in stub_address().
2907 // What's more, we need this alignment for the layout done in
2908 // relaxation_loop_body() so that the output section starts at
2909 // a suitably aligned address.
2910 os->checkpoint_set_addralign(this->stub_align());
2912 if (this->last_plt_size_ != this->plt_size_
2913 || this->last_branch_size_ != this->branch_size_)
2915 this->last_plt_size_ = this->plt_size_;
2916 this->last_branch_size_ = this->branch_size_;
2922 Target_powerpc<size, big_endian>*
2928 class Plt_stub_ent_hash;
2929 typedef Unordered_map<Plt_stub_ent, unsigned int,
2930 Plt_stub_ent_hash> Plt_stub_entries;
2932 // Alignment of stub section.
2938 unsigned int min_align = 32;
2939 unsigned int user_align = 1 << parameters->options().plt_align();
2940 return std::max(user_align, min_align);
2943 // Size of a given plt call stub.
2945 plt_call_size(typename Plt_stub_entries::const_iterator p) const
2950 Address pltaddr = p->second;
2951 if (p->first.sym_ == NULL
2952 || (p->first.sym_->type() == elfcpp::STT_GNU_IFUNC
2953 && p->first.sym_->can_use_relative_reloc(false)))
2954 pltaddr += this->targ_->iplt_section()->address();
2956 pltaddr += this->targ_->plt_section()->address();
2957 Address tocbase = this->targ_->got_section()->output_section()->address();
2958 const Powerpc_relobj<size, big_endian>* ppcobj = static_cast
2959 <const Powerpc_relobj<size, big_endian>*>(p->first.object_);
2960 tocbase += ppcobj->toc_base_offset();
2961 Address off = pltaddr - tocbase;
2962 bool static_chain = parameters->options().plt_static_chain();
2963 bool thread_safe = this->targ_->plt_thread_safe();
2964 unsigned int bytes = (4 * 5
2967 + 4 * (ha(off) != 0)
2968 + 4 * (ha(off + 8 + 8 * static_chain) != ha(off)));
2969 unsigned int align = 1 << parameters->options().plt_align();
2971 bytes = (bytes + align - 1) & -align;
2975 // Return long branch stub size.
2977 branch_stub_size(Address to)
2980 = this->stub_address() + this->last_plt_size_ + this->branch_size_;
2981 if (to - loc + (1 << 25) < 2 << 25)
2983 if (size == 64 || !parameters->options().output_is_position_independent())
2990 do_write(Output_file*);
2992 // Plt call stub keys.
2996 Plt_stub_ent(const Symbol* sym)
2997 : sym_(sym), object_(0), addend_(0), locsym_(0)
3000 Plt_stub_ent(const Sized_relobj_file<size, big_endian>* object,
3001 unsigned int locsym_index)
3002 : sym_(NULL), object_(object), addend_(0), locsym_(locsym_index)
3005 Plt_stub_ent(const Sized_relobj_file<size, big_endian>* object,
3007 unsigned int r_type,
3009 : sym_(sym), object_(0), addend_(0), locsym_(0)
3012 this->addend_ = addend;
3013 else if (parameters->options().output_is_position_independent()
3014 && r_type == elfcpp::R_PPC_PLTREL24)
3016 this->addend_ = addend;
3017 if (this->addend_ >= 32768)
3018 this->object_ = object;
3022 Plt_stub_ent(const Sized_relobj_file<size, big_endian>* object,
3023 unsigned int locsym_index,
3024 unsigned int r_type,
3026 : sym_(NULL), object_(object), addend_(0), locsym_(locsym_index)
3029 this->addend_ = addend;
3030 else if (parameters->options().output_is_position_independent()
3031 && r_type == elfcpp::R_PPC_PLTREL24)
3032 this->addend_ = addend;
3035 bool operator==(const Plt_stub_ent& that) const
3037 return (this->sym_ == that.sym_
3038 && this->object_ == that.object_
3039 && this->addend_ == that.addend_
3040 && this->locsym_ == that.locsym_);
3044 const Sized_relobj_file<size, big_endian>* object_;
3045 typename elfcpp::Elf_types<size>::Elf_Addr addend_;
3046 unsigned int locsym_;
3049 class Plt_stub_ent_hash
3052 size_t operator()(const Plt_stub_ent& ent) const
3054 return (reinterpret_cast<uintptr_t>(ent.sym_)
3055 ^ reinterpret_cast<uintptr_t>(ent.object_)
3061 // Long branch stub keys.
3062 class Branch_stub_ent
3065 Branch_stub_ent(const Powerpc_relobj<size, big_endian>* obj, Address to)
3066 : dest_(to), toc_base_off_(0)
3069 toc_base_off_ = obj->toc_base_offset();
3072 bool operator==(const Branch_stub_ent& that) const
3074 return (this->dest_ == that.dest_
3076 || this->toc_base_off_ == that.toc_base_off_));
3080 unsigned int toc_base_off_;
3083 class Branch_stub_ent_hash
3086 size_t operator()(const Branch_stub_ent& ent) const
3087 { return ent.dest_ ^ ent.toc_base_off_; }
3090 // In a sane world this would be a global.
3091 Target_powerpc<size, big_endian>* targ_;
3092 // Map sym/object/addend to stub offset.
3093 Plt_stub_entries plt_call_stubs_;
3094 // Map destination address to stub offset.
3095 typedef Unordered_map<Branch_stub_ent, unsigned int,
3096 Branch_stub_ent_hash> Branch_stub_entries;
3097 Branch_stub_entries long_branch_stubs_;
3098 // size of input section
3099 section_size_type orig_data_size_;
3101 section_size_type plt_size_, last_plt_size_, branch_size_, last_branch_size_;
3104 // Make a new stub table, and record.
3106 template<int size, bool big_endian>
3107 Stub_table<size, big_endian>*
3108 Target_powerpc<size, big_endian>::new_stub_table()
3110 Stub_table<size, big_endian>* stub_table
3111 = new Stub_table<size, big_endian>(this);
3112 this->stub_tables_.push_back(stub_table);
3116 // Delayed stub table initialisation, because we create the stub table
3117 // before we know to which section it will be attached.
3119 template<int size, bool big_endian>
3121 Stub_table<size, big_endian>::init(
3122 const Output_section::Input_section* owner,
3123 Output_section* output_section)
3125 this->set_relobj(owner->relobj());
3126 this->set_shndx(owner->shndx());
3127 this->set_addralign(this->relobj()->section_addralign(this->shndx()));
3128 this->set_output_section(output_section);
3129 this->orig_data_size_ = owner->current_data_size();
3131 std::vector<Output_relaxed_input_section*> new_relaxed;
3132 new_relaxed.push_back(this);
3133 output_section->convert_input_sections_to_relaxed_sections(new_relaxed);
3136 // Add a plt call stub, if we do not already have one for this
3137 // sym/object/addend combo.
3139 template<int size, bool big_endian>
3141 Stub_table<size, big_endian>::add_plt_call_entry(
3142 const Sized_relobj_file<size, big_endian>* object,
3144 unsigned int r_type,
3147 Plt_stub_ent ent(object, gsym, r_type, addend);
3148 Address off = this->plt_size_;
3149 std::pair<typename Plt_stub_entries::iterator, bool> p
3150 = this->plt_call_stubs_.insert(std::make_pair(ent, off));
3152 this->plt_size_ = off + this->plt_call_size(p.first);
3155 template<int size, bool big_endian>
3157 Stub_table<size, big_endian>::add_plt_call_entry(
3158 const Sized_relobj_file<size, big_endian>* object,
3159 unsigned int locsym_index,
3160 unsigned int r_type,
3163 Plt_stub_ent ent(object, locsym_index, r_type, addend);
3164 Address off = this->plt_size_;
3165 std::pair<typename Plt_stub_entries::iterator, bool> p
3166 = this->plt_call_stubs_.insert(std::make_pair(ent, off));
3168 this->plt_size_ = off + this->plt_call_size(p.first);
3171 // Find a plt call stub.
3173 template<int size, bool big_endian>
3174 typename Stub_table<size, big_endian>::Address
3175 Stub_table<size, big_endian>::find_plt_call_entry(
3176 const Sized_relobj_file<size, big_endian>* object,
3178 unsigned int r_type,
3179 Address addend) const
3181 Plt_stub_ent ent(object, gsym, r_type, addend);
3182 typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent);
3183 return p == this->plt_call_stubs_.end() ? invalid_address : p->second;
3186 template<int size, bool big_endian>
3187 typename Stub_table<size, big_endian>::Address
3188 Stub_table<size, big_endian>::find_plt_call_entry(const Symbol* gsym) const
3190 Plt_stub_ent ent(gsym);
3191 typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent);
3192 return p == this->plt_call_stubs_.end() ? invalid_address : p->second;
3195 template<int size, bool big_endian>
3196 typename Stub_table<size, big_endian>::Address
3197 Stub_table<size, big_endian>::find_plt_call_entry(
3198 const Sized_relobj_file<size, big_endian>* object,
3199 unsigned int locsym_index,
3200 unsigned int r_type,
3201 Address addend) const
3203 Plt_stub_ent ent(object, locsym_index, r_type, addend);
3204 typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent);
3205 return p == this->plt_call_stubs_.end() ? invalid_address : p->second;
3208 template<int size, bool big_endian>
3209 typename Stub_table<size, big_endian>::Address
3210 Stub_table<size, big_endian>::find_plt_call_entry(
3211 const Sized_relobj_file<size, big_endian>* object,
3212 unsigned int locsym_index) const
3214 Plt_stub_ent ent(object, locsym_index);
3215 typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent);
3216 return p == this->plt_call_stubs_.end() ? invalid_address : p->second;
3219 // Add a long branch stub if we don't already have one to given
3222 template<int size, bool big_endian>
3224 Stub_table<size, big_endian>::add_long_branch_entry(
3225 const Powerpc_relobj<size, big_endian>* object,
3228 Branch_stub_ent ent(object, to);
3229 Address off = this->branch_size_;
3230 if (this->long_branch_stubs_.insert(std::make_pair(ent, off)).second)
3232 unsigned int stub_size = this->branch_stub_size(to);
3233 this->branch_size_ = off + stub_size;
3234 if (size == 64 && stub_size != 4)
3235 this->targ_->add_branch_lookup_table(to);
3239 // Find long branch stub.
3241 template<int size, bool big_endian>
3242 typename Stub_table<size, big_endian>::Address
3243 Stub_table<size, big_endian>::find_long_branch_entry(
3244 const Powerpc_relobj<size, big_endian>* object,
3247 Branch_stub_ent ent(object, to);
3248 typename Branch_stub_entries::const_iterator p
3249 = this->long_branch_stubs_.find(ent);
3250 return p == this->long_branch_stubs_.end() ? invalid_address : p->second;
3253 // A class to handle .glink.
3255 template<int size, bool big_endian>
3256 class Output_data_glink : public Output_section_data
3259 static const int pltresolve_size = 16*4;
3261 Output_data_glink(Target_powerpc<size, big_endian>* targ)
3262 : Output_section_data(16), targ_(targ)
3266 // Write to a map file.
3268 do_print_to_mapfile(Mapfile* mapfile) const
3269 { mapfile->print_output_data(this, _("** glink")); }
3273 set_final_data_size();
3277 do_write(Output_file*);
3279 // Allows access to .got and .plt for do_write.
3280 Target_powerpc<size, big_endian>* targ_;
3283 template<int size, bool big_endian>
3285 Output_data_glink<size, big_endian>::set_final_data_size()
3287 unsigned int count = this->targ_->plt_entry_count();
3288 section_size_type total = 0;
3294 // space for branch table
3295 total += 4 * (count - 1);
3297 total += -total & 15;
3298 total += this->pltresolve_size;
3302 total += this->pltresolve_size;
3304 // space for branch table
3307 total += 4 * (count - 0x8000);
3311 this->set_data_size(total);
3314 // Write out plt and long branch stub code.
3316 template<int size, bool big_endian>
3318 Stub_table<size, big_endian>::do_write(Output_file* of)
3320 if (this->plt_call_stubs_.empty()
3321 && this->long_branch_stubs_.empty())
3324 const section_size_type start_off = this->offset();
3325 const section_size_type off = this->stub_offset();
3326 const section_size_type oview_size =
3327 convert_to_section_size_type(this->data_size() - (off - start_off));
3328 unsigned char* const oview = of->get_output_view(off, oview_size);
3333 const Output_data_got_powerpc<size, big_endian>* got
3334 = this->targ_->got_section();
3335 Address got_os_addr = got->output_section()->address();
3337 if (!this->plt_call_stubs_.empty())
3339 // The base address of the .plt section.
3340 Address plt_base = this->targ_->plt_section()->address();
3341 Address iplt_base = invalid_address;
3343 // Write out plt call stubs.
3344 typename Plt_stub_entries::const_iterator cs;
3345 for (cs = this->plt_call_stubs_.begin();
3346 cs != this->plt_call_stubs_.end();
3351 const Symbol* gsym = cs->first.sym_;
3354 is_ifunc = (gsym->type() == elfcpp::STT_GNU_IFUNC
3355 && gsym->can_use_relative_reloc(false));
3356 pltoff = gsym->plt_offset();
3361 const Sized_relobj_file<size, big_endian>* relobj
3362 = cs->first.object_;
3363 unsigned int local_sym_index = cs->first.locsym_;
3364 pltoff = relobj->local_plt_offset(local_sym_index);
3366 Address plt_addr = pltoff;
3369 if (iplt_base == invalid_address)
3370 iplt_base = this->targ_->iplt_section()->address();
3371 plt_addr += iplt_base;
3374 plt_addr += plt_base;
3375 const Powerpc_relobj<size, big_endian>* ppcobj = static_cast
3376 <const Powerpc_relobj<size, big_endian>*>(cs->first.object_);
3377 Address got_addr = got_os_addr + ppcobj->toc_base_offset();
3378 Address off = plt_addr - got_addr;
3380 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
3381 gold_error(_("%s: linkage table error against `%s'"),
3382 cs->first.object_->name().c_str(),
3383 cs->first.sym_->demangled_name().c_str());
3385 bool static_chain = parameters->options().plt_static_chain();
3386 bool thread_safe = this->targ_->plt_thread_safe();
3387 bool use_fake_dep = false;
3388 Address cmp_branch_off = 0;
3391 unsigned int pltindex
3392 = ((pltoff - this->targ_->first_plt_entry_offset())
3393 / this->targ_->plt_entry_size());
3395 = (this->targ_->glink_section()->pltresolve_size
3397 if (pltindex > 32768)
3398 glinkoff += (pltindex - 32768) * 4;
3400 = this->targ_->glink_section()->address() + glinkoff;
3402 = (this->stub_address() + cs->second + 24
3403 + 4 * (ha(off) != 0)
3404 + 4 * (ha(off + 8 + 8 * static_chain) != ha(off))
3405 + 4 * static_chain);
3406 cmp_branch_off = to - from;
3407 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
3410 p = oview + cs->second;
3413 write_insn<big_endian>(p, std_2_1 + 40), p += 4;
3414 write_insn<big_endian>(p, addis_12_2 + ha(off)), p += 4;
3415 write_insn<big_endian>(p, ld_11_12 + l(off)), p += 4;
3416 if (ha(off + 8 + 8 * static_chain) != ha(off))
3418 write_insn<big_endian>(p, addi_12_12 + l(off)), p += 4;
3421 write_insn<big_endian>(p, mtctr_11), p += 4;
3424 write_insn<big_endian>(p, xor_11_11_11), p += 4;
3425 write_insn<big_endian>(p, add_12_12_11), p += 4;
3427 write_insn<big_endian>(p, ld_2_12 + l(off + 8)), p += 4;
3429 write_insn<big_endian>(p, ld_11_12 + l(off + 16)), p += 4;
3433 write_insn<big_endian>(p, std_2_1 + 40), p += 4;
3434 write_insn<big_endian>(p, ld_11_2 + l(off)), p += 4;
3435 if (ha(off + 8 + 8 * static_chain) != ha(off))
3437 write_insn<big_endian>(p, addi_2_2 + l(off)), p += 4;
3440 write_insn<big_endian>(p, mtctr_11), p += 4;
3443 write_insn<big_endian>(p, xor_11_11_11), p += 4;
3444 write_insn<big_endian>(p, add_2_2_11), p += 4;
3447 write_insn<big_endian>(p, ld_11_2 + l(off + 16)), p += 4;
3448 write_insn<big_endian>(p, ld_2_2 + l(off + 8)), p += 4;
3450 if (thread_safe && !use_fake_dep)
3452 write_insn<big_endian>(p, cmpldi_2_0), p += 4;
3453 write_insn<big_endian>(p, bnectr_p4), p += 4;
3454 write_insn<big_endian>(p, b | (cmp_branch_off & 0x3fffffc));
3457 write_insn<big_endian>(p, bctr);
3461 // Write out long branch stubs.
3462 typename Branch_stub_entries::const_iterator bs;
3463 for (bs = this->long_branch_stubs_.begin();
3464 bs != this->long_branch_stubs_.end();
3467 p = oview + this->plt_size_ + bs->second;
3468 Address loc = this->stub_address() + this->plt_size_ + bs->second;
3469 Address delta = bs->first.dest_ - loc;
3470 if (delta + (1 << 25) < 2 << 25)
3471 write_insn<big_endian>(p, b | (delta & 0x3fffffc));
3475 = this->targ_->find_branch_lookup_table(bs->first.dest_);
3476 gold_assert(brlt_addr != invalid_address);
3477 brlt_addr += this->targ_->brlt_section()->address();
3478 Address got_addr = got_os_addr + bs->first.toc_base_off_;
3479 Address brltoff = brlt_addr - got_addr;
3480 if (ha(brltoff) == 0)
3482 write_insn<big_endian>(p, ld_11_2 + l(brltoff)), p += 4;
3486 write_insn<big_endian>(p, addis_12_2 + ha(brltoff)), p += 4;
3487 write_insn<big_endian>(p, ld_11_12 + l(brltoff)), p += 4;
3489 write_insn<big_endian>(p, mtctr_11), p += 4;
3490 write_insn<big_endian>(p, bctr);
3496 if (!this->plt_call_stubs_.empty())
3498 // The base address of the .plt section.
3499 Address plt_base = this->targ_->plt_section()->address();
3500 Address iplt_base = invalid_address;
3501 // The address of _GLOBAL_OFFSET_TABLE_.
3502 Address g_o_t = invalid_address;
3504 // Write out plt call stubs.
3505 typename Plt_stub_entries::const_iterator cs;
3506 for (cs = this->plt_call_stubs_.begin();
3507 cs != this->plt_call_stubs_.end();
3512 const Symbol* gsym = cs->first.sym_;
3515 is_ifunc = (gsym->type() == elfcpp::STT_GNU_IFUNC
3516 && gsym->can_use_relative_reloc(false));
3517 plt_addr = gsym->plt_offset();
3522 const Sized_relobj_file<size, big_endian>* relobj
3523 = cs->first.object_;
3524 unsigned int local_sym_index = cs->first.locsym_;
3525 plt_addr = relobj->local_plt_offset(local_sym_index);
3529 if (iplt_base == invalid_address)
3530 iplt_base = this->targ_->iplt_section()->address();
3531 plt_addr += iplt_base;
3534 plt_addr += plt_base;
3536 p = oview + cs->second;
3537 if (parameters->options().output_is_position_independent())
3540 const Powerpc_relobj<size, big_endian>* ppcobj
3541 = (static_cast<const Powerpc_relobj<size, big_endian>*>
3542 (cs->first.object_));
3543 if (ppcobj != NULL && cs->first.addend_ >= 32768)
3545 unsigned int got2 = ppcobj->got2_shndx();
3546 got_addr = ppcobj->get_output_section_offset(got2);
3547 gold_assert(got_addr != invalid_address);
3548 got_addr += (ppcobj->output_section(got2)->address()
3549 + cs->first.addend_);
3553 if (g_o_t == invalid_address)
3555 const Output_data_got_powerpc<size, big_endian>* got
3556 = this->targ_->got_section();
3557 g_o_t = got->address() + got->g_o_t();
3562 Address off = plt_addr - got_addr;
3565 write_insn<big_endian>(p + 0, lwz_11_30 + l(off));
3566 write_insn<big_endian>(p + 4, mtctr_11);
3567 write_insn<big_endian>(p + 8, bctr);
3571 write_insn<big_endian>(p + 0, addis_11_30 + ha(off));
3572 write_insn<big_endian>(p + 4, lwz_11_11 + l(off));
3573 write_insn<big_endian>(p + 8, mtctr_11);
3574 write_insn<big_endian>(p + 12, bctr);
3579 write_insn<big_endian>(p + 0, lis_11 + ha(plt_addr));
3580 write_insn<big_endian>(p + 4, lwz_11_11 + l(plt_addr));
3581 write_insn<big_endian>(p + 8, mtctr_11);
3582 write_insn<big_endian>(p + 12, bctr);
3587 // Write out long branch stubs.
3588 typename Branch_stub_entries::const_iterator bs;
3589 for (bs = this->long_branch_stubs_.begin();
3590 bs != this->long_branch_stubs_.end();
3593 p = oview + this->plt_size_ + bs->second;
3594 Address loc = this->stub_address() + this->plt_size_ + bs->second;
3595 Address delta = bs->first.dest_ - loc;
3596 if (delta + (1 << 25) < 2 << 25)
3597 write_insn<big_endian>(p, b | (delta & 0x3fffffc));
3598 else if (!parameters->options().output_is_position_independent())
3600 write_insn<big_endian>(p + 0, lis_12 + ha(bs->first.dest_));
3601 write_insn<big_endian>(p + 4, addi_12_12 + l(bs->first.dest_));
3602 write_insn<big_endian>(p + 8, mtctr_12);
3603 write_insn<big_endian>(p + 12, bctr);
3608 write_insn<big_endian>(p + 0, mflr_0);
3609 write_insn<big_endian>(p + 4, bcl_20_31);
3610 write_insn<big_endian>(p + 8, mflr_12);
3611 write_insn<big_endian>(p + 12, addis_12_12 + ha(delta));
3612 write_insn<big_endian>(p + 16, addi_12_12 + l(delta));
3613 write_insn<big_endian>(p + 20, mtlr_0);
3614 write_insn<big_endian>(p + 24, mtctr_12);
3615 write_insn<big_endian>(p + 28, bctr);
3621 // Write out .glink.
3623 template<int size, bool big_endian>
3625 Output_data_glink<size, big_endian>::do_write(Output_file* of)
3627 const section_size_type off = this->offset();
3628 const section_size_type oview_size =
3629 convert_to_section_size_type(this->data_size());
3630 unsigned char* const oview = of->get_output_view(off, oview_size);
3633 // The base address of the .plt section.
3634 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
3635 Address plt_base = this->targ_->plt_section()->address();
3639 // Write pltresolve stub.
3641 Address after_bcl = this->address() + 16;
3642 Address pltoff = plt_base - after_bcl;
3644 elfcpp::Swap<64, big_endian>::writeval(p, pltoff), p += 8;
3646 write_insn<big_endian>(p, mflr_12), p += 4;
3647 write_insn<big_endian>(p, bcl_20_31), p += 4;
3648 write_insn<big_endian>(p, mflr_11), p += 4;
3649 write_insn<big_endian>(p, ld_2_11 + l(-16)), p += 4;
3650 write_insn<big_endian>(p, mtlr_12), p += 4;
3651 write_insn<big_endian>(p, add_12_2_11), p += 4;
3652 write_insn<big_endian>(p, ld_11_12 + 0), p += 4;
3653 write_insn<big_endian>(p, ld_2_12 + 8), p += 4;
3654 write_insn<big_endian>(p, mtctr_11), p += 4;
3655 write_insn<big_endian>(p, ld_11_12 + 16), p += 4;
3656 write_insn<big_endian>(p, bctr), p += 4;
3657 while (p < oview + this->pltresolve_size)
3658 write_insn<big_endian>(p, nop), p += 4;
3660 // Write lazy link call stubs.
3662 while (p < oview + oview_size)
3666 write_insn<big_endian>(p, li_0_0 + indx), p += 4;
3670 write_insn<big_endian>(p, lis_0_0 + hi(indx)), p += 4;
3671 write_insn<big_endian>(p, ori_0_0_0 + l(indx)), p += 4;
3673 uint32_t branch_off = 8 - (p - oview);
3674 write_insn<big_endian>(p, b + (branch_off & 0x3fffffc)), p += 4;
3680 const Output_data_got_powerpc<size, big_endian>* got
3681 = this->targ_->got_section();
3682 // The address of _GLOBAL_OFFSET_TABLE_.
3683 Address g_o_t = got->address() + got->g_o_t();
3685 // Write out pltresolve branch table.
3687 unsigned int the_end = oview_size - this->pltresolve_size;
3688 unsigned char* end_p = oview + the_end;
3689 while (p < end_p - 8 * 4)
3690 write_insn<big_endian>(p, b + end_p - p), p += 4;
3692 write_insn<big_endian>(p, nop), p += 4;
3694 // Write out pltresolve call stub.
3695 if (parameters->options().output_is_position_independent())
3697 Address res0_off = 0;
3698 Address after_bcl_off = the_end + 12;
3699 Address bcl_res0 = after_bcl_off - res0_off;
3701 write_insn<big_endian>(p + 0, addis_11_11 + ha(bcl_res0));
3702 write_insn<big_endian>(p + 4, mflr_0);
3703 write_insn<big_endian>(p + 8, bcl_20_31);
3704 write_insn<big_endian>(p + 12, addi_11_11 + l(bcl_res0));
3705 write_insn<big_endian>(p + 16, mflr_12);
3706 write_insn<big_endian>(p + 20, mtlr_0);
3707 write_insn<big_endian>(p + 24, sub_11_11_12);
3709 Address got_bcl = g_o_t + 4 - (after_bcl_off + this->address());
3711 write_insn<big_endian>(p + 28, addis_12_12 + ha(got_bcl));
3712 if (ha(got_bcl) == ha(got_bcl + 4))
3714 write_insn<big_endian>(p + 32, lwz_0_12 + l(got_bcl));
3715 write_insn<big_endian>(p + 36, lwz_12_12 + l(got_bcl + 4));
3719 write_insn<big_endian>(p + 32, lwzu_0_12 + l(got_bcl));
3720 write_insn<big_endian>(p + 36, lwz_12_12 + 4);
3722 write_insn<big_endian>(p + 40, mtctr_0);
3723 write_insn<big_endian>(p + 44, add_0_11_11);
3724 write_insn<big_endian>(p + 48, add_11_0_11);
3725 write_insn<big_endian>(p + 52, bctr);
3726 write_insn<big_endian>(p + 56, nop);
3727 write_insn<big_endian>(p + 60, nop);
3731 Address res0 = this->address();
3733 write_insn<big_endian>(p + 0, lis_12 + ha(g_o_t + 4));
3734 write_insn<big_endian>(p + 4, addis_11_11 + ha(-res0));
3735 if (ha(g_o_t + 4) == ha(g_o_t + 8))
3736 write_insn<big_endian>(p + 8, lwz_0_12 + l(g_o_t + 4));
3738 write_insn<big_endian>(p + 8, lwzu_0_12 + l(g_o_t + 4));
3739 write_insn<big_endian>(p + 12, addi_11_11 + l(-res0));
3740 write_insn<big_endian>(p + 16, mtctr_0);
3741 write_insn<big_endian>(p + 20, add_0_11_11);
3742 if (ha(g_o_t + 4) == ha(g_o_t + 8))
3743 write_insn<big_endian>(p + 24, lwz_12_12 + l(g_o_t + 8));
3745 write_insn<big_endian>(p + 24, lwz_12_12 + 4);
3746 write_insn<big_endian>(p + 28, add_11_0_11);
3747 write_insn<big_endian>(p + 32, bctr);
3748 write_insn<big_endian>(p + 36, nop);
3749 write_insn<big_endian>(p + 40, nop);
3750 write_insn<big_endian>(p + 44, nop);
3751 write_insn<big_endian>(p + 48, nop);
3752 write_insn<big_endian>(p + 52, nop);
3753 write_insn<big_endian>(p + 56, nop);
3754 write_insn<big_endian>(p + 60, nop);
3759 of->write_output_view(off, oview_size, oview);
3763 // A class to handle linker generated save/restore functions.
3765 template<int size, bool big_endian>
3766 class Output_data_save_res : public Output_section_data_build
3769 Output_data_save_res(Symbol_table* symtab);
3772 // Write to a map file.
3774 do_print_to_mapfile(Mapfile* mapfile) const
3775 { mapfile->print_output_data(this, _("** save/restore")); }
3778 do_write(Output_file*);
3781 // The maximum size of save/restore contents.
3782 static const unsigned int savres_max = 218*4;
3785 savres_define(Symbol_table* symtab,
3787 unsigned int lo, unsigned int hi,
3788 unsigned char* write_ent(unsigned char*, int),
3789 unsigned char* write_tail(unsigned char*, int));
3791 unsigned char *contents_;
3794 template<bool big_endian>
3795 static unsigned char*
3796 savegpr0(unsigned char* p, int r)
3798 uint32_t insn = std_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8;
3799 write_insn<big_endian>(p, insn);
3803 template<bool big_endian>
3804 static unsigned char*
3805 savegpr0_tail(unsigned char* p, int r)
3807 p = savegpr0<big_endian>(p, r);
3808 uint32_t insn = std_0_1 + 16;
3809 write_insn<big_endian>(p, insn);
3811 write_insn<big_endian>(p, blr);
3815 template<bool big_endian>
3816 static unsigned char*
3817 restgpr0(unsigned char* p, int r)
3819 uint32_t insn = ld_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8;
3820 write_insn<big_endian>(p, insn);
3824 template<bool big_endian>
3825 static unsigned char*
3826 restgpr0_tail(unsigned char* p, int r)
3828 uint32_t insn = ld_0_1 + 16;
3829 write_insn<big_endian>(p, insn);
3831 p = restgpr0<big_endian>(p, r);
3832 write_insn<big_endian>(p, mtlr_0);
3836 p = restgpr0<big_endian>(p, 30);
3837 p = restgpr0<big_endian>(p, 31);
3839 write_insn<big_endian>(p, blr);
3843 template<bool big_endian>
3844 static unsigned char*
3845 savegpr1(unsigned char* p, int r)
3847 uint32_t insn = std_0_12 + (r << 21) + (1 << 16) - (32 - r) * 8;
3848 write_insn<big_endian>(p, insn);
3852 template<bool big_endian>
3853 static unsigned char*
3854 savegpr1_tail(unsigned char* p, int r)
3856 p = savegpr1<big_endian>(p, r);
3857 write_insn<big_endian>(p, blr);
3861 template<bool big_endian>
3862 static unsigned char*
3863 restgpr1(unsigned char* p, int r)
3865 uint32_t insn = ld_0_12 + (r << 21) + (1 << 16) - (32 - r) * 8;
3866 write_insn<big_endian>(p, insn);
3870 template<bool big_endian>
3871 static unsigned char*
3872 restgpr1_tail(unsigned char* p, int r)
3874 p = restgpr1<big_endian>(p, r);
3875 write_insn<big_endian>(p, blr);
3879 template<bool big_endian>
3880 static unsigned char*
3881 savefpr(unsigned char* p, int r)
3883 uint32_t insn = stfd_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8;
3884 write_insn<big_endian>(p, insn);
3888 template<bool big_endian>
3889 static unsigned char*
3890 savefpr0_tail(unsigned char* p, int r)
3892 p = savefpr<big_endian>(p, r);
3893 write_insn<big_endian>(p, std_0_1 + 16);
3895 write_insn<big_endian>(p, blr);
3899 template<bool big_endian>
3900 static unsigned char*
3901 restfpr(unsigned char* p, int r)
3903 uint32_t insn = lfd_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8;
3904 write_insn<big_endian>(p, insn);
3908 template<bool big_endian>
3909 static unsigned char*
3910 restfpr0_tail(unsigned char* p, int r)
3912 write_insn<big_endian>(p, ld_0_1 + 16);
3914 p = restfpr<big_endian>(p, r);
3915 write_insn<big_endian>(p, mtlr_0);
3919 p = restfpr<big_endian>(p, 30);
3920 p = restfpr<big_endian>(p, 31);
3922 write_insn<big_endian>(p, blr);
3926 template<bool big_endian>
3927 static unsigned char*
3928 savefpr1_tail(unsigned char* p, int r)
3930 p = savefpr<big_endian>(p, r);
3931 write_insn<big_endian>(p, blr);
3935 template<bool big_endian>
3936 static unsigned char*
3937 restfpr1_tail(unsigned char* p, int r)
3939 p = restfpr<big_endian>(p, r);
3940 write_insn<big_endian>(p, blr);
3944 template<bool big_endian>
3945 static unsigned char*
3946 savevr(unsigned char* p, int r)
3948 uint32_t insn = li_12_0 + (1 << 16) - (32 - r) * 16;
3949 write_insn<big_endian>(p, insn);
3951 insn = stvx_0_12_0 + (r << 21);
3952 write_insn<big_endian>(p, insn);
3956 template<bool big_endian>
3957 static unsigned char*
3958 savevr_tail(unsigned char* p, int r)
3960 p = savevr<big_endian>(p, r);
3961 write_insn<big_endian>(p, blr);
3965 template<bool big_endian>
3966 static unsigned char*
3967 restvr(unsigned char* p, int r)
3969 uint32_t insn = li_12_0 + (1 << 16) - (32 - r) * 16;
3970 write_insn<big_endian>(p, insn);
3972 insn = lvx_0_12_0 + (r << 21);
3973 write_insn<big_endian>(p, insn);
3977 template<bool big_endian>
3978 static unsigned char*
3979 restvr_tail(unsigned char* p, int r)
3981 p = restvr<big_endian>(p, r);
3982 write_insn<big_endian>(p, blr);
3987 template<int size, bool big_endian>
3988 Output_data_save_res<size, big_endian>::Output_data_save_res(
3989 Symbol_table* symtab)
3990 : Output_section_data_build(4),
3993 this->savres_define(symtab,
3994 "_savegpr0_", 14, 31,
3995 savegpr0<big_endian>, savegpr0_tail<big_endian>);
3996 this->savres_define(symtab,
3997 "_restgpr0_", 14, 29,
3998 restgpr0<big_endian>, restgpr0_tail<big_endian>);
3999 this->savres_define(symtab,
4000 "_restgpr0_", 30, 31,
4001 restgpr0<big_endian>, restgpr0_tail<big_endian>);
4002 this->savres_define(symtab,
4003 "_savegpr1_", 14, 31,
4004 savegpr1<big_endian>, savegpr1_tail<big_endian>);
4005 this->savres_define(symtab,
4006 "_restgpr1_", 14, 31,
4007 restgpr1<big_endian>, restgpr1_tail<big_endian>);
4008 this->savres_define(symtab,
4009 "_savefpr_", 14, 31,
4010 savefpr<big_endian>, savefpr0_tail<big_endian>);
4011 this->savres_define(symtab,
4012 "_restfpr_", 14, 29,
4013 restfpr<big_endian>, restfpr0_tail<big_endian>);
4014 this->savres_define(symtab,
4015 "_restfpr_", 30, 31,
4016 restfpr<big_endian>, restfpr0_tail<big_endian>);
4017 this->savres_define(symtab,
4019 savefpr<big_endian>, savefpr1_tail<big_endian>);
4020 this->savres_define(symtab,
4022 restfpr<big_endian>, restfpr1_tail<big_endian>);
4023 this->savres_define(symtab,
4025 savevr<big_endian>, savevr_tail<big_endian>);
4026 this->savres_define(symtab,
4028 restvr<big_endian>, restvr_tail<big_endian>);
4031 template<int size, bool big_endian>
4033 Output_data_save_res<size, big_endian>::savres_define(
4034 Symbol_table* symtab,
4036 unsigned int lo, unsigned int hi,
4037 unsigned char* write_ent(unsigned char*, int),
4038 unsigned char* write_tail(unsigned char*, int))
4040 size_t len = strlen(name);
4041 bool writing = false;
4044 memcpy(sym, name, len);
4047 for (unsigned int i = lo; i <= hi; i++)
4049 sym[len + 0] = i / 10 + '0';
4050 sym[len + 1] = i % 10 + '0';
4051 Symbol* gsym = symtab->lookup(sym);
4052 bool refd = gsym != NULL && gsym->is_undefined();
4053 writing = writing || refd;
4056 if (this->contents_ == NULL)
4057 this->contents_ = new unsigned char[this->savres_max];
4059 section_size_type value = this->current_data_size();
4060 unsigned char* p = this->contents_ + value;
4062 p = write_ent(p, i);
4064 p = write_tail(p, i);
4065 section_size_type cur_size = p - this->contents_;
4066 this->set_current_data_size(cur_size);
4068 symtab->define_in_output_data(sym, NULL, Symbol_table::PREDEFINED,
4069 this, value, cur_size - value,
4070 elfcpp::STT_FUNC, elfcpp::STB_GLOBAL,
4071 elfcpp::STV_HIDDEN, 0, false, false);
4076 // Write out save/restore.
4078 template<int size, bool big_endian>
4080 Output_data_save_res<size, big_endian>::do_write(Output_file* of)
4082 const section_size_type off = this->offset();
4083 const section_size_type oview_size =
4084 convert_to_section_size_type(this->data_size());
4085 unsigned char* const oview = of->get_output_view(off, oview_size);
4086 memcpy(oview, this->contents_, oview_size);
4087 of->write_output_view(off, oview_size, oview);
4091 // Create the glink section.
4093 template<int size, bool big_endian>
4095 Target_powerpc<size, big_endian>::make_glink_section(Layout* layout)
4097 if (this->glink_ == NULL)
4099 this->glink_ = new Output_data_glink<size, big_endian>(this);
4100 layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS,
4101 elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR,
4102 this->glink_, ORDER_TEXT, false);
4106 // Create a PLT entry for a global symbol.
4108 template<int size, bool big_endian>
4110 Target_powerpc<size, big_endian>::make_plt_entry(Symbol_table* symtab,
4114 if (gsym->type() == elfcpp::STT_GNU_IFUNC
4115 && gsym->can_use_relative_reloc(false))
4117 if (this->iplt_ == NULL)
4118 this->make_iplt_section(symtab, layout);
4119 this->iplt_->add_ifunc_entry(gsym);
4123 if (this->plt_ == NULL)
4124 this->make_plt_section(symtab, layout);
4125 this->plt_->add_entry(gsym);
4129 // Make a PLT entry for a local STT_GNU_IFUNC symbol.
4131 template<int size, bool big_endian>
4133 Target_powerpc<size, big_endian>::make_local_ifunc_plt_entry(
4134 Symbol_table* symtab,
4136 Sized_relobj_file<size, big_endian>* relobj,
4139 if (this->iplt_ == NULL)
4140 this->make_iplt_section(symtab, layout);
4141 this->iplt_->add_local_ifunc_entry(relobj, r_sym);
4144 // Return the number of entries in the PLT.
4146 template<int size, bool big_endian>
4148 Target_powerpc<size, big_endian>::plt_entry_count() const
4150 if (this->plt_ == NULL)
4152 unsigned int count = this->plt_->entry_count();
4153 if (this->iplt_ != NULL)
4154 count += this->iplt_->entry_count();
4158 // Return the offset of the first non-reserved PLT entry.
4160 template<int size, bool big_endian>
4162 Target_powerpc<size, big_endian>::first_plt_entry_offset() const
4164 return this->plt_->first_plt_entry_offset();
4167 // Return the size of each PLT entry.
4169 template<int size, bool big_endian>
4171 Target_powerpc<size, big_endian>::plt_entry_size() const
4173 return Output_data_plt_powerpc<size, big_endian>::get_plt_entry_size();
4176 // Create a GOT entry for local dynamic __tls_get_addr calls.
4178 template<int size, bool big_endian>
4180 Target_powerpc<size, big_endian>::tlsld_got_offset(
4181 Symbol_table* symtab,
4183 Sized_relobj_file<size, big_endian>* object)
4185 if (this->tlsld_got_offset_ == -1U)
4187 gold_assert(symtab != NULL && layout != NULL && object != NULL);
4188 Reloc_section* rela_dyn = this->rela_dyn_section(layout);
4189 Output_data_got_powerpc<size, big_endian>* got
4190 = this->got_section(symtab, layout);
4191 unsigned int got_offset = got->add_constant_pair(0, 0);
4192 rela_dyn->add_local(object, 0, elfcpp::R_POWERPC_DTPMOD, got,
4194 this->tlsld_got_offset_ = got_offset;
4196 return this->tlsld_got_offset_;
4199 // Get the Reference_flags for a particular relocation.
4201 template<int size, bool big_endian>
4203 Target_powerpc<size, big_endian>::Scan::get_reference_flags(unsigned int r_type)
4207 case elfcpp::R_POWERPC_NONE:
4208 case elfcpp::R_POWERPC_GNU_VTINHERIT:
4209 case elfcpp::R_POWERPC_GNU_VTENTRY:
4210 case elfcpp::R_PPC64_TOC:
4211 // No symbol reference.
4214 case elfcpp::R_PPC64_ADDR64:
4215 case elfcpp::R_PPC64_UADDR64:
4216 case elfcpp::R_POWERPC_ADDR32:
4217 case elfcpp::R_POWERPC_UADDR32:
4218 case elfcpp::R_POWERPC_ADDR16:
4219 case elfcpp::R_POWERPC_UADDR16:
4220 case elfcpp::R_POWERPC_ADDR16_LO:
4221 case elfcpp::R_POWERPC_ADDR16_HI:
4222 case elfcpp::R_POWERPC_ADDR16_HA:
4223 return Symbol::ABSOLUTE_REF;
4225 case elfcpp::R_POWERPC_ADDR24:
4226 case elfcpp::R_POWERPC_ADDR14:
4227 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
4228 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
4229 return Symbol::FUNCTION_CALL | Symbol::ABSOLUTE_REF;
4231 case elfcpp::R_PPC64_REL64:
4232 case elfcpp::R_POWERPC_REL32:
4233 case elfcpp::R_PPC_LOCAL24PC:
4234 case elfcpp::R_POWERPC_REL16:
4235 case elfcpp::R_POWERPC_REL16_LO:
4236 case elfcpp::R_POWERPC_REL16_HI:
4237 case elfcpp::R_POWERPC_REL16_HA:
4238 return Symbol::RELATIVE_REF;
4240 case elfcpp::R_POWERPC_REL24:
4241 case elfcpp::R_PPC_PLTREL24:
4242 case elfcpp::R_POWERPC_REL14:
4243 case elfcpp::R_POWERPC_REL14_BRTAKEN:
4244 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
4245 return Symbol::FUNCTION_CALL | Symbol::RELATIVE_REF;
4247 case elfcpp::R_POWERPC_GOT16:
4248 case elfcpp::R_POWERPC_GOT16_LO:
4249 case elfcpp::R_POWERPC_GOT16_HI:
4250 case elfcpp::R_POWERPC_GOT16_HA:
4251 case elfcpp::R_PPC64_GOT16_DS:
4252 case elfcpp::R_PPC64_GOT16_LO_DS:
4253 case elfcpp::R_PPC64_TOC16:
4254 case elfcpp::R_PPC64_TOC16_LO:
4255 case elfcpp::R_PPC64_TOC16_HI:
4256 case elfcpp::R_PPC64_TOC16_HA:
4257 case elfcpp::R_PPC64_TOC16_DS:
4258 case elfcpp::R_PPC64_TOC16_LO_DS:
4260 return Symbol::ABSOLUTE_REF;
4262 case elfcpp::R_POWERPC_GOT_TPREL16:
4263 case elfcpp::R_POWERPC_TLS:
4264 return Symbol::TLS_REF;
4266 case elfcpp::R_POWERPC_COPY:
4267 case elfcpp::R_POWERPC_GLOB_DAT:
4268 case elfcpp::R_POWERPC_JMP_SLOT:
4269 case elfcpp::R_POWERPC_RELATIVE:
4270 case elfcpp::R_POWERPC_DTPMOD:
4272 // Not expected. We will give an error later.
4277 // Report an unsupported relocation against a local symbol.
4279 template<int size, bool big_endian>
4281 Target_powerpc<size, big_endian>::Scan::unsupported_reloc_local(
4282 Sized_relobj_file<size, big_endian>* object,
4283 unsigned int r_type)
4285 gold_error(_("%s: unsupported reloc %u against local symbol"),
4286 object->name().c_str(), r_type);
4289 // We are about to emit a dynamic relocation of type R_TYPE. If the
4290 // dynamic linker does not support it, issue an error.
4292 template<int size, bool big_endian>
4294 Target_powerpc<size, big_endian>::Scan::check_non_pic(Relobj* object,
4295 unsigned int r_type)
4297 gold_assert(r_type != elfcpp::R_POWERPC_NONE);
4299 // These are the relocation types supported by glibc for both 32-bit
4300 // and 64-bit powerpc.
4303 case elfcpp::R_POWERPC_NONE:
4304 case elfcpp::R_POWERPC_RELATIVE:
4305 case elfcpp::R_POWERPC_GLOB_DAT:
4306 case elfcpp::R_POWERPC_DTPMOD:
4307 case elfcpp::R_POWERPC_DTPREL:
4308 case elfcpp::R_POWERPC_TPREL:
4309 case elfcpp::R_POWERPC_JMP_SLOT:
4310 case elfcpp::R_POWERPC_COPY:
4311 case elfcpp::R_POWERPC_IRELATIVE:
4312 case elfcpp::R_POWERPC_ADDR32:
4313 case elfcpp::R_POWERPC_UADDR32:
4314 case elfcpp::R_POWERPC_ADDR24:
4315 case elfcpp::R_POWERPC_ADDR16:
4316 case elfcpp::R_POWERPC_UADDR16:
4317 case elfcpp::R_POWERPC_ADDR16_LO:
4318 case elfcpp::R_POWERPC_ADDR16_HI:
4319 case elfcpp::R_POWERPC_ADDR16_HA:
4320 case elfcpp::R_POWERPC_ADDR14:
4321 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
4322 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
4323 case elfcpp::R_POWERPC_REL32:
4324 case elfcpp::R_POWERPC_REL24:
4325 case elfcpp::R_POWERPC_TPREL16:
4326 case elfcpp::R_POWERPC_TPREL16_LO:
4327 case elfcpp::R_POWERPC_TPREL16_HI:
4328 case elfcpp::R_POWERPC_TPREL16_HA:
4339 // These are the relocation types supported only on 64-bit.
4340 case elfcpp::R_PPC64_ADDR64:
4341 case elfcpp::R_PPC64_UADDR64:
4342 case elfcpp::R_PPC64_JMP_IREL:
4343 case elfcpp::R_PPC64_ADDR16_DS:
4344 case elfcpp::R_PPC64_ADDR16_LO_DS:
4345 case elfcpp::R_PPC64_ADDR16_HIGHER:
4346 case elfcpp::R_PPC64_ADDR16_HIGHEST:
4347 case elfcpp::R_PPC64_ADDR16_HIGHERA:
4348 case elfcpp::R_PPC64_ADDR16_HIGHESTA:
4349 case elfcpp::R_PPC64_REL64:
4350 case elfcpp::R_POWERPC_ADDR30:
4351 case elfcpp::R_PPC64_TPREL16_DS:
4352 case elfcpp::R_PPC64_TPREL16_LO_DS:
4353 case elfcpp::R_PPC64_TPREL16_HIGHER:
4354 case elfcpp::R_PPC64_TPREL16_HIGHEST:
4355 case elfcpp::R_PPC64_TPREL16_HIGHERA:
4356 case elfcpp::R_PPC64_TPREL16_HIGHESTA:
4367 // These are the relocation types supported only on 32-bit.
4368 // ??? glibc ld.so doesn't need to support these.
4369 case elfcpp::R_POWERPC_DTPREL16:
4370 case elfcpp::R_POWERPC_DTPREL16_LO:
4371 case elfcpp::R_POWERPC_DTPREL16_HI:
4372 case elfcpp::R_POWERPC_DTPREL16_HA:
4380 // This prevents us from issuing more than one error per reloc
4381 // section. But we can still wind up issuing more than one
4382 // error per object file.
4383 if (this->issued_non_pic_error_)
4385 gold_assert(parameters->options().output_is_position_independent());
4386 object->error(_("requires unsupported dynamic reloc; "
4387 "recompile with -fPIC"));
4388 this->issued_non_pic_error_ = true;
4392 // Return whether we need to make a PLT entry for a relocation of the
4393 // given type against a STT_GNU_IFUNC symbol.
4395 template<int size, bool big_endian>
4397 Target_powerpc<size, big_endian>::Scan::reloc_needs_plt_for_ifunc(
4398 Sized_relobj_file<size, big_endian>* object,
4399 unsigned int r_type)
4401 // In non-pic code any reference will resolve to the plt call stub
4402 // for the ifunc symbol.
4403 if (size == 32 && !parameters->options().output_is_position_independent())
4408 // Word size refs from data sections are OK.
4409 case elfcpp::R_POWERPC_ADDR32:
4410 case elfcpp::R_POWERPC_UADDR32:
4415 case elfcpp::R_PPC64_ADDR64:
4416 case elfcpp::R_PPC64_UADDR64:
4421 // GOT refs are good.
4422 case elfcpp::R_POWERPC_GOT16:
4423 case elfcpp::R_POWERPC_GOT16_LO:
4424 case elfcpp::R_POWERPC_GOT16_HI:
4425 case elfcpp::R_POWERPC_GOT16_HA:
4426 case elfcpp::R_PPC64_GOT16_DS:
4427 case elfcpp::R_PPC64_GOT16_LO_DS:
4430 // So are function calls.
4431 case elfcpp::R_POWERPC_ADDR24:
4432 case elfcpp::R_POWERPC_ADDR14:
4433 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
4434 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
4435 case elfcpp::R_POWERPC_REL24:
4436 case elfcpp::R_PPC_PLTREL24:
4437 case elfcpp::R_POWERPC_REL14:
4438 case elfcpp::R_POWERPC_REL14_BRTAKEN:
4439 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
4446 // Anything else is a problem.
4447 // If we are building a static executable, the libc startup function
4448 // responsible for applying indirect function relocations is going
4449 // to complain about the reloc type.
4450 // If we are building a dynamic executable, we will have a text
4451 // relocation. The dynamic loader will set the text segment
4452 // writable and non-executable to apply text relocations. So we'll
4453 // segfault when trying to run the indirection function to resolve
4455 gold_error(_("%s: unsupported reloc %u for IFUNC symbol"),
4456 object->name().c_str(), r_type);
4460 // Scan a relocation for a local symbol.
4462 template<int size, bool big_endian>
4464 Target_powerpc<size, big_endian>::Scan::local(
4465 Symbol_table* symtab,
4467 Target_powerpc<size, big_endian>* target,
4468 Sized_relobj_file<size, big_endian>* object,
4469 unsigned int data_shndx,
4470 Output_section* output_section,
4471 const elfcpp::Rela<size, big_endian>& reloc,
4472 unsigned int r_type,
4473 const elfcpp::Sym<size, big_endian>& lsym,
4476 this->maybe_skip_tls_get_addr_call(r_type, NULL);
4478 if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD)
4479 || (size == 32 && r_type == elfcpp::R_PPC_TLSGD))
4481 this->expect_tls_get_addr_call();
4482 const tls::Tls_optimization tls_type = target->optimize_tls_gd(true);
4483 if (tls_type != tls::TLSOPT_NONE)
4484 this->skip_next_tls_get_addr_call();
4486 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD)
4487 || (size == 32 && r_type == elfcpp::R_PPC_TLSLD))
4489 this->expect_tls_get_addr_call();
4490 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
4491 if (tls_type != tls::TLSOPT_NONE)
4492 this->skip_next_tls_get_addr_call();
4495 Powerpc_relobj<size, big_endian>* ppc_object
4496 = static_cast<Powerpc_relobj<size, big_endian>*>(object);
4501 && data_shndx == ppc_object->opd_shndx()
4502 && r_type == elfcpp::R_PPC64_ADDR64)
4503 ppc_object->set_opd_discard(reloc.get_r_offset());
4507 // A local STT_GNU_IFUNC symbol may require a PLT entry.
4508 bool is_ifunc = lsym.get_st_type() == elfcpp::STT_GNU_IFUNC;
4509 if (is_ifunc && this->reloc_needs_plt_for_ifunc(object, r_type))
4511 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
4512 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
4513 r_type, r_sym, reloc.get_r_addend());
4514 target->make_local_ifunc_plt_entry(symtab, layout, object, r_sym);
4519 case elfcpp::R_POWERPC_NONE:
4520 case elfcpp::R_POWERPC_GNU_VTINHERIT:
4521 case elfcpp::R_POWERPC_GNU_VTENTRY:
4522 case elfcpp::R_PPC64_TOCSAVE:
4523 case elfcpp::R_PPC_EMB_MRKREF:
4524 case elfcpp::R_POWERPC_TLS:
4527 case elfcpp::R_PPC64_TOC:
4529 Output_data_got_powerpc<size, big_endian>* got
4530 = target->got_section(symtab, layout);
4531 if (parameters->options().output_is_position_independent())
4533 Address off = reloc.get_r_offset();
4535 && data_shndx == ppc_object->opd_shndx()
4536 && ppc_object->get_opd_discard(off - 8))
4539 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
4540 Powerpc_relobj<size, big_endian>* symobj = ppc_object;
4541 rela_dyn->add_output_section_relative(got->output_section(),
4542 elfcpp::R_POWERPC_RELATIVE,
4544 object, data_shndx, off,
4545 symobj->toc_base_offset());
4550 case elfcpp::R_PPC64_ADDR64:
4551 case elfcpp::R_PPC64_UADDR64:
4552 case elfcpp::R_POWERPC_ADDR32:
4553 case elfcpp::R_POWERPC_UADDR32:
4554 case elfcpp::R_POWERPC_ADDR24:
4555 case elfcpp::R_POWERPC_ADDR16:
4556 case elfcpp::R_POWERPC_ADDR16_LO:
4557 case elfcpp::R_POWERPC_ADDR16_HI:
4558 case elfcpp::R_POWERPC_ADDR16_HA:
4559 case elfcpp::R_POWERPC_UADDR16:
4560 case elfcpp::R_PPC64_ADDR16_HIGHER:
4561 case elfcpp::R_PPC64_ADDR16_HIGHERA:
4562 case elfcpp::R_PPC64_ADDR16_HIGHEST:
4563 case elfcpp::R_PPC64_ADDR16_HIGHESTA:
4564 case elfcpp::R_PPC64_ADDR16_DS:
4565 case elfcpp::R_PPC64_ADDR16_LO_DS:
4566 case elfcpp::R_POWERPC_ADDR14:
4567 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
4568 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
4569 // If building a shared library (or a position-independent
4570 // executable), we need to create a dynamic relocation for
4572 if (parameters->options().output_is_position_independent()
4573 || (size == 64 && is_ifunc))
4575 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
4577 if ((size == 32 && r_type == elfcpp::R_POWERPC_ADDR32)
4578 || (size == 64 && r_type == elfcpp::R_PPC64_ADDR64))
4580 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
4581 unsigned int dynrel = elfcpp::R_POWERPC_RELATIVE;
4584 rela_dyn = target->iplt_section()->rel_plt();
4585 dynrel = elfcpp::R_POWERPC_IRELATIVE;
4587 rela_dyn->add_local_relative(object, r_sym, dynrel,
4588 output_section, data_shndx,
4589 reloc.get_r_offset(),
4590 reloc.get_r_addend(), false);
4594 check_non_pic(object, r_type);
4595 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
4596 rela_dyn->add_local(object, r_sym, r_type, output_section,
4597 data_shndx, reloc.get_r_offset(),
4598 reloc.get_r_addend());
4603 case elfcpp::R_POWERPC_REL24:
4604 case elfcpp::R_PPC_PLTREL24:
4605 case elfcpp::R_PPC_LOCAL24PC:
4606 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
4607 r_type, elfcpp::elf_r_sym<size>(reloc.get_r_info()),
4608 reloc.get_r_addend());
4611 case elfcpp::R_POWERPC_REL14:
4612 case elfcpp::R_POWERPC_REL14_BRTAKEN:
4613 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
4614 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
4615 r_type, elfcpp::elf_r_sym<size>(reloc.get_r_info()),
4616 reloc.get_r_addend());
4619 case elfcpp::R_PPC64_REL64:
4620 case elfcpp::R_POWERPC_REL32:
4621 case elfcpp::R_POWERPC_REL16:
4622 case elfcpp::R_POWERPC_REL16_LO:
4623 case elfcpp::R_POWERPC_REL16_HI:
4624 case elfcpp::R_POWERPC_REL16_HA:
4625 case elfcpp::R_POWERPC_SECTOFF:
4626 case elfcpp::R_POWERPC_TPREL16:
4627 case elfcpp::R_POWERPC_DTPREL16:
4628 case elfcpp::R_POWERPC_SECTOFF_LO:
4629 case elfcpp::R_POWERPC_TPREL16_LO:
4630 case elfcpp::R_POWERPC_DTPREL16_LO:
4631 case elfcpp::R_POWERPC_SECTOFF_HI:
4632 case elfcpp::R_POWERPC_TPREL16_HI:
4633 case elfcpp::R_POWERPC_DTPREL16_HI:
4634 case elfcpp::R_POWERPC_SECTOFF_HA:
4635 case elfcpp::R_POWERPC_TPREL16_HA:
4636 case elfcpp::R_POWERPC_DTPREL16_HA:
4637 case elfcpp::R_PPC64_DTPREL16_HIGHER:
4638 case elfcpp::R_PPC64_TPREL16_HIGHER:
4639 case elfcpp::R_PPC64_DTPREL16_HIGHERA:
4640 case elfcpp::R_PPC64_TPREL16_HIGHERA:
4641 case elfcpp::R_PPC64_DTPREL16_HIGHEST:
4642 case elfcpp::R_PPC64_TPREL16_HIGHEST:
4643 case elfcpp::R_PPC64_DTPREL16_HIGHESTA:
4644 case elfcpp::R_PPC64_TPREL16_HIGHESTA:
4645 case elfcpp::R_PPC64_TPREL16_DS:
4646 case elfcpp::R_PPC64_TPREL16_LO_DS:
4647 case elfcpp::R_PPC64_DTPREL16_DS:
4648 case elfcpp::R_PPC64_DTPREL16_LO_DS:
4649 case elfcpp::R_PPC64_SECTOFF_DS:
4650 case elfcpp::R_PPC64_SECTOFF_LO_DS:
4651 case elfcpp::R_PPC64_TLSGD:
4652 case elfcpp::R_PPC64_TLSLD:
4655 case elfcpp::R_POWERPC_GOT16:
4656 case elfcpp::R_POWERPC_GOT16_LO:
4657 case elfcpp::R_POWERPC_GOT16_HI:
4658 case elfcpp::R_POWERPC_GOT16_HA:
4659 case elfcpp::R_PPC64_GOT16_DS:
4660 case elfcpp::R_PPC64_GOT16_LO_DS:
4662 // The symbol requires a GOT entry.
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());
4667 if (!parameters->options().output_is_position_independent())
4669 if (size == 32 && is_ifunc)
4670 got->add_local_plt(object, r_sym, GOT_TYPE_STANDARD);
4672 got->add_local(object, r_sym, GOT_TYPE_STANDARD);
4674 else if (!object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD))
4676 // If we are generating a shared object or a pie, this
4677 // symbol's GOT entry will be set by a dynamic relocation.
4679 off = got->add_constant(0);
4680 object->set_local_got_offset(r_sym, GOT_TYPE_STANDARD, off);
4682 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
4683 unsigned int dynrel = elfcpp::R_POWERPC_RELATIVE;
4686 rela_dyn = target->iplt_section()->rel_plt();
4687 dynrel = elfcpp::R_POWERPC_IRELATIVE;
4689 rela_dyn->add_local_relative(object, r_sym, dynrel,
4690 got, off, 0, false);
4695 case elfcpp::R_PPC64_TOC16:
4696 case elfcpp::R_PPC64_TOC16_LO:
4697 case elfcpp::R_PPC64_TOC16_HI:
4698 case elfcpp::R_PPC64_TOC16_HA:
4699 case elfcpp::R_PPC64_TOC16_DS:
4700 case elfcpp::R_PPC64_TOC16_LO_DS:
4701 // We need a GOT section.
4702 target->got_section(symtab, layout);
4705 case elfcpp::R_POWERPC_GOT_TLSGD16:
4706 case elfcpp::R_POWERPC_GOT_TLSGD16_LO:
4707 case elfcpp::R_POWERPC_GOT_TLSGD16_HI:
4708 case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
4710 const tls::Tls_optimization tls_type = target->optimize_tls_gd(true);
4711 if (tls_type == tls::TLSOPT_NONE)
4713 Output_data_got_powerpc<size, big_endian>* got
4714 = target->got_section(symtab, layout);
4715 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
4716 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
4717 got->add_local_tls_pair(object, r_sym, GOT_TYPE_TLSGD,
4718 rela_dyn, elfcpp::R_POWERPC_DTPMOD);
4720 else if (tls_type == tls::TLSOPT_TO_LE)
4722 // no GOT relocs needed for Local Exec.
4729 case elfcpp::R_POWERPC_GOT_TLSLD16:
4730 case elfcpp::R_POWERPC_GOT_TLSLD16_LO:
4731 case elfcpp::R_POWERPC_GOT_TLSLD16_HI:
4732 case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
4734 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
4735 if (tls_type == tls::TLSOPT_NONE)
4736 target->tlsld_got_offset(symtab, layout, object);
4737 else if (tls_type == tls::TLSOPT_TO_LE)
4739 // no GOT relocs needed for Local Exec.
4740 if (parameters->options().emit_relocs())
4742 Output_section* os = layout->tls_segment()->first_section();
4743 gold_assert(os != NULL);
4744 os->set_needs_symtab_index();
4752 case elfcpp::R_POWERPC_GOT_DTPREL16:
4753 case elfcpp::R_POWERPC_GOT_DTPREL16_LO:
4754 case elfcpp::R_POWERPC_GOT_DTPREL16_HI:
4755 case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
4757 Output_data_got_powerpc<size, big_endian>* got
4758 = target->got_section(symtab, layout);
4759 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
4760 got->add_local_tls(object, r_sym, GOT_TYPE_DTPREL);
4764 case elfcpp::R_POWERPC_GOT_TPREL16:
4765 case elfcpp::R_POWERPC_GOT_TPREL16_LO:
4766 case elfcpp::R_POWERPC_GOT_TPREL16_HI:
4767 case elfcpp::R_POWERPC_GOT_TPREL16_HA:
4769 const tls::Tls_optimization tls_type = target->optimize_tls_ie(true);
4770 if (tls_type == tls::TLSOPT_NONE)
4772 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
4773 if (!object->local_has_got_offset(r_sym, GOT_TYPE_TPREL))
4775 Output_data_got_powerpc<size, big_endian>* got
4776 = target->got_section(symtab, layout);
4777 unsigned int off = got->add_constant(0);
4778 object->set_local_got_offset(r_sym, GOT_TYPE_TPREL, off);
4780 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
4781 rela_dyn->add_symbolless_local_addend(object, r_sym,
4782 elfcpp::R_POWERPC_TPREL,
4786 else if (tls_type == tls::TLSOPT_TO_LE)
4788 // no GOT relocs needed for Local Exec.
4796 unsupported_reloc_local(object, r_type);
4802 case elfcpp::R_POWERPC_GOT_TLSLD16:
4803 case elfcpp::R_POWERPC_GOT_TLSGD16:
4804 case elfcpp::R_POWERPC_GOT_TPREL16:
4805 case elfcpp::R_POWERPC_GOT_DTPREL16:
4806 case elfcpp::R_POWERPC_GOT16:
4807 case elfcpp::R_PPC64_GOT16_DS:
4808 case elfcpp::R_PPC64_TOC16:
4809 case elfcpp::R_PPC64_TOC16_DS:
4810 ppc_object->set_has_small_toc_reloc();
4816 // Report an unsupported relocation against a global symbol.
4818 template<int size, bool big_endian>
4820 Target_powerpc<size, big_endian>::Scan::unsupported_reloc_global(
4821 Sized_relobj_file<size, big_endian>* object,
4822 unsigned int r_type,
4825 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
4826 object->name().c_str(), r_type, gsym->demangled_name().c_str());
4829 // Scan a relocation for a global symbol.
4831 template<int size, bool big_endian>
4833 Target_powerpc<size, big_endian>::Scan::global(
4834 Symbol_table* symtab,
4836 Target_powerpc<size, big_endian>* target,
4837 Sized_relobj_file<size, big_endian>* object,
4838 unsigned int data_shndx,
4839 Output_section* output_section,
4840 const elfcpp::Rela<size, big_endian>& reloc,
4841 unsigned int r_type,
4844 if (this->maybe_skip_tls_get_addr_call(r_type, gsym) == Track_tls::SKIP)
4847 if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD)
4848 || (size == 32 && r_type == elfcpp::R_PPC_TLSGD))
4850 this->expect_tls_get_addr_call();
4851 const bool final = gsym->final_value_is_known();
4852 const tls::Tls_optimization tls_type = target->optimize_tls_gd(final);
4853 if (tls_type != tls::TLSOPT_NONE)
4854 this->skip_next_tls_get_addr_call();
4856 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD)
4857 || (size == 32 && r_type == elfcpp::R_PPC_TLSLD))
4859 this->expect_tls_get_addr_call();
4860 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
4861 if (tls_type != tls::TLSOPT_NONE)
4862 this->skip_next_tls_get_addr_call();
4865 Powerpc_relobj<size, big_endian>* ppc_object
4866 = static_cast<Powerpc_relobj<size, big_endian>*>(object);
4868 // A STT_GNU_IFUNC symbol may require a PLT entry.
4869 if (gsym->type() == elfcpp::STT_GNU_IFUNC
4870 && this->reloc_needs_plt_for_ifunc(object, r_type))
4872 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
4873 r_type, elfcpp::elf_r_sym<size>(reloc.get_r_info()),
4874 reloc.get_r_addend());
4875 target->make_plt_entry(symtab, layout, gsym);
4880 case elfcpp::R_POWERPC_NONE:
4881 case elfcpp::R_POWERPC_GNU_VTINHERIT:
4882 case elfcpp::R_POWERPC_GNU_VTENTRY:
4883 case elfcpp::R_PPC_LOCAL24PC:
4884 case elfcpp::R_PPC_EMB_MRKREF:
4885 case elfcpp::R_POWERPC_TLS:
4888 case elfcpp::R_PPC64_TOC:
4890 Output_data_got_powerpc<size, big_endian>* got
4891 = target->got_section(symtab, layout);
4892 if (parameters->options().output_is_position_independent())
4894 Address off = reloc.get_r_offset();
4896 && data_shndx == ppc_object->opd_shndx()
4897 && ppc_object->get_opd_discard(off - 8))
4900 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
4901 Powerpc_relobj<size, big_endian>* symobj = ppc_object;
4902 if (data_shndx != ppc_object->opd_shndx())
4903 symobj = static_cast
4904 <Powerpc_relobj<size, big_endian>*>(gsym->object());
4905 rela_dyn->add_output_section_relative(got->output_section(),
4906 elfcpp::R_POWERPC_RELATIVE,
4908 object, data_shndx, off,
4909 symobj->toc_base_offset());
4914 case elfcpp::R_PPC64_ADDR64:
4916 && data_shndx == ppc_object->opd_shndx()
4917 && (gsym->is_defined_in_discarded_section()
4918 || gsym->object() != object))
4920 ppc_object->set_opd_discard(reloc.get_r_offset());
4924 case elfcpp::R_PPC64_UADDR64:
4925 case elfcpp::R_POWERPC_ADDR32:
4926 case elfcpp::R_POWERPC_UADDR32:
4927 case elfcpp::R_POWERPC_ADDR24:
4928 case elfcpp::R_POWERPC_ADDR16:
4929 case elfcpp::R_POWERPC_ADDR16_LO:
4930 case elfcpp::R_POWERPC_ADDR16_HI:
4931 case elfcpp::R_POWERPC_ADDR16_HA:
4932 case elfcpp::R_POWERPC_UADDR16:
4933 case elfcpp::R_PPC64_ADDR16_HIGHER:
4934 case elfcpp::R_PPC64_ADDR16_HIGHERA:
4935 case elfcpp::R_PPC64_ADDR16_HIGHEST:
4936 case elfcpp::R_PPC64_ADDR16_HIGHESTA:
4937 case elfcpp::R_PPC64_ADDR16_DS:
4938 case elfcpp::R_PPC64_ADDR16_LO_DS:
4939 case elfcpp::R_POWERPC_ADDR14:
4940 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
4941 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
4943 // Make a PLT entry if necessary.
4944 if (gsym->needs_plt_entry())
4946 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
4948 elfcpp::elf_r_sym<size>(reloc.get_r_info()),
4949 reloc.get_r_addend());
4950 target->make_plt_entry(symtab, layout, gsym);
4951 // Since this is not a PC-relative relocation, we may be
4952 // taking the address of a function. In that case we need to
4953 // set the entry in the dynamic symbol table to the address of
4954 // the PLT call stub.
4956 && gsym->is_from_dynobj()
4957 && !parameters->options().output_is_position_independent())
4958 gsym->set_needs_dynsym_value();
4960 // Make a dynamic relocation if necessary.
4961 if (needs_dynamic_reloc<size>(gsym, Scan::get_reference_flags(r_type))
4962 || (size == 64 && gsym->type() == elfcpp::STT_GNU_IFUNC))
4964 if (gsym->may_need_copy_reloc())
4966 target->copy_reloc(symtab, layout, object,
4967 data_shndx, output_section, gsym, reloc);
4969 else if ((size == 32
4970 && r_type == elfcpp::R_POWERPC_ADDR32
4971 && gsym->can_use_relative_reloc(false)
4972 && !(gsym->visibility() == elfcpp::STV_PROTECTED
4973 && parameters->options().shared()))
4975 && r_type == elfcpp::R_PPC64_ADDR64
4976 && (gsym->can_use_relative_reloc(false)
4977 || data_shndx == ppc_object->opd_shndx())))
4979 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
4980 unsigned int dynrel = elfcpp::R_POWERPC_RELATIVE;
4981 if (gsym->type() == elfcpp::STT_GNU_IFUNC)
4983 rela_dyn = target->iplt_section()->rel_plt();
4984 dynrel = elfcpp::R_POWERPC_IRELATIVE;
4986 rela_dyn->add_symbolless_global_addend(
4987 gsym, dynrel, output_section, object, data_shndx,
4988 reloc.get_r_offset(), reloc.get_r_addend());
4992 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
4993 check_non_pic(object, r_type);
4994 rela_dyn->add_global(gsym, r_type, output_section,
4996 reloc.get_r_offset(),
4997 reloc.get_r_addend());
5003 case elfcpp::R_PPC_PLTREL24:
5004 case elfcpp::R_POWERPC_REL24:
5005 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
5006 r_type, elfcpp::elf_r_sym<size>(reloc.get_r_info()),
5007 reloc.get_r_addend());
5008 if (gsym->needs_plt_entry()
5009 || (!gsym->final_value_is_known()
5010 && (gsym->is_undefined()
5011 || gsym->is_from_dynobj()
5012 || gsym->is_preemptible())))
5013 target->make_plt_entry(symtab, layout, gsym);
5016 case elfcpp::R_PPC64_REL64:
5017 case elfcpp::R_POWERPC_REL32:
5018 // Make a dynamic relocation if necessary.
5019 if (needs_dynamic_reloc<size>(gsym, Scan::get_reference_flags(r_type)))
5021 if (gsym->may_need_copy_reloc())
5023 target->copy_reloc(symtab, layout, object,
5024 data_shndx, output_section, gsym,
5029 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
5030 check_non_pic(object, r_type);
5031 rela_dyn->add_global(gsym, r_type, output_section, object,
5032 data_shndx, reloc.get_r_offset(),
5033 reloc.get_r_addend());
5038 case elfcpp::R_POWERPC_REL14:
5039 case elfcpp::R_POWERPC_REL14_BRTAKEN:
5040 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
5041 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
5042 r_type, elfcpp::elf_r_sym<size>(reloc.get_r_info()),
5043 reloc.get_r_addend());
5046 case elfcpp::R_POWERPC_REL16:
5047 case elfcpp::R_POWERPC_REL16_LO:
5048 case elfcpp::R_POWERPC_REL16_HI:
5049 case elfcpp::R_POWERPC_REL16_HA:
5050 case elfcpp::R_POWERPC_SECTOFF:
5051 case elfcpp::R_POWERPC_TPREL16:
5052 case elfcpp::R_POWERPC_DTPREL16:
5053 case elfcpp::R_POWERPC_SECTOFF_LO:
5054 case elfcpp::R_POWERPC_TPREL16_LO:
5055 case elfcpp::R_POWERPC_DTPREL16_LO:
5056 case elfcpp::R_POWERPC_SECTOFF_HI:
5057 case elfcpp::R_POWERPC_TPREL16_HI:
5058 case elfcpp::R_POWERPC_DTPREL16_HI:
5059 case elfcpp::R_POWERPC_SECTOFF_HA:
5060 case elfcpp::R_POWERPC_TPREL16_HA:
5061 case elfcpp::R_POWERPC_DTPREL16_HA:
5062 case elfcpp::R_PPC64_DTPREL16_HIGHER:
5063 case elfcpp::R_PPC64_TPREL16_HIGHER:
5064 case elfcpp::R_PPC64_DTPREL16_HIGHERA:
5065 case elfcpp::R_PPC64_TPREL16_HIGHERA:
5066 case elfcpp::R_PPC64_DTPREL16_HIGHEST:
5067 case elfcpp::R_PPC64_TPREL16_HIGHEST:
5068 case elfcpp::R_PPC64_DTPREL16_HIGHESTA:
5069 case elfcpp::R_PPC64_TPREL16_HIGHESTA:
5070 case elfcpp::R_PPC64_TPREL16_DS:
5071 case elfcpp::R_PPC64_TPREL16_LO_DS:
5072 case elfcpp::R_PPC64_DTPREL16_DS:
5073 case elfcpp::R_PPC64_DTPREL16_LO_DS:
5074 case elfcpp::R_PPC64_SECTOFF_DS:
5075 case elfcpp::R_PPC64_SECTOFF_LO_DS:
5076 case elfcpp::R_PPC64_TLSGD:
5077 case elfcpp::R_PPC64_TLSLD:
5080 case elfcpp::R_POWERPC_GOT16:
5081 case elfcpp::R_POWERPC_GOT16_LO:
5082 case elfcpp::R_POWERPC_GOT16_HI:
5083 case elfcpp::R_POWERPC_GOT16_HA:
5084 case elfcpp::R_PPC64_GOT16_DS:
5085 case elfcpp::R_PPC64_GOT16_LO_DS:
5087 // The symbol requires a GOT entry.
5088 Output_data_got_powerpc<size, big_endian>* got;
5090 got = target->got_section(symtab, layout);
5091 if (gsym->final_value_is_known())
5093 if (size == 32 && gsym->type() == elfcpp::STT_GNU_IFUNC)
5094 got->add_global_plt(gsym, GOT_TYPE_STANDARD);
5096 got->add_global(gsym, GOT_TYPE_STANDARD);
5098 else if (!gsym->has_got_offset(GOT_TYPE_STANDARD))
5100 // If we are generating a shared object or a pie, this
5101 // symbol's GOT entry will be set by a dynamic relocation.
5102 unsigned int off = got->add_constant(0);
5103 gsym->set_got_offset(GOT_TYPE_STANDARD, off);
5105 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
5106 if (gsym->can_use_relative_reloc(false)
5108 && gsym->visibility() == elfcpp::STV_PROTECTED
5109 && parameters->options().shared()))
5111 unsigned int dynrel = elfcpp::R_POWERPC_RELATIVE;
5112 if (gsym->type() == elfcpp::STT_GNU_IFUNC)
5114 rela_dyn = target->iplt_section()->rel_plt();
5115 dynrel = elfcpp::R_POWERPC_IRELATIVE;
5117 rela_dyn->add_global_relative(gsym, dynrel, got, off, 0, false);
5121 unsigned int dynrel = elfcpp::R_POWERPC_GLOB_DAT;
5122 rela_dyn->add_global(gsym, dynrel, got, off, 0);
5128 case elfcpp::R_PPC64_TOC16:
5129 case elfcpp::R_PPC64_TOC16_LO:
5130 case elfcpp::R_PPC64_TOC16_HI:
5131 case elfcpp::R_PPC64_TOC16_HA:
5132 case elfcpp::R_PPC64_TOC16_DS:
5133 case elfcpp::R_PPC64_TOC16_LO_DS:
5134 // We need a GOT section.
5135 target->got_section(symtab, layout);
5138 case elfcpp::R_POWERPC_GOT_TLSGD16:
5139 case elfcpp::R_POWERPC_GOT_TLSGD16_LO:
5140 case elfcpp::R_POWERPC_GOT_TLSGD16_HI:
5141 case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
5143 const bool final = gsym->final_value_is_known();
5144 const tls::Tls_optimization tls_type = target->optimize_tls_gd(final);
5145 if (tls_type == tls::TLSOPT_NONE)
5147 Output_data_got_powerpc<size, big_endian>* got
5148 = target->got_section(symtab, layout);
5149 got->add_global_pair_with_rel(gsym, GOT_TYPE_TLSGD,
5150 target->rela_dyn_section(layout),
5151 elfcpp::R_POWERPC_DTPMOD,
5152 elfcpp::R_POWERPC_DTPREL);
5154 else if (tls_type == tls::TLSOPT_TO_IE)
5156 if (!gsym->has_got_offset(GOT_TYPE_TPREL))
5158 Output_data_got_powerpc<size, big_endian>* got
5159 = target->got_section(symtab, layout);
5160 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
5161 if (gsym->is_undefined()
5162 || gsym->is_from_dynobj())
5164 got->add_global_with_rel(gsym, GOT_TYPE_TPREL, rela_dyn,
5165 elfcpp::R_POWERPC_TPREL);
5169 unsigned int off = got->add_constant(0);
5170 gsym->set_got_offset(GOT_TYPE_TPREL, off);
5171 unsigned int dynrel = elfcpp::R_POWERPC_TPREL;
5172 rela_dyn->add_symbolless_global_addend(gsym, dynrel,
5177 else if (tls_type == tls::TLSOPT_TO_LE)
5179 // no GOT relocs needed for Local Exec.
5186 case elfcpp::R_POWERPC_GOT_TLSLD16:
5187 case elfcpp::R_POWERPC_GOT_TLSLD16_LO:
5188 case elfcpp::R_POWERPC_GOT_TLSLD16_HI:
5189 case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
5191 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
5192 if (tls_type == tls::TLSOPT_NONE)
5193 target->tlsld_got_offset(symtab, layout, object);
5194 else if (tls_type == tls::TLSOPT_TO_LE)
5196 // no GOT relocs needed for Local Exec.
5197 if (parameters->options().emit_relocs())
5199 Output_section* os = layout->tls_segment()->first_section();
5200 gold_assert(os != NULL);
5201 os->set_needs_symtab_index();
5209 case elfcpp::R_POWERPC_GOT_DTPREL16:
5210 case elfcpp::R_POWERPC_GOT_DTPREL16_LO:
5211 case elfcpp::R_POWERPC_GOT_DTPREL16_HI:
5212 case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
5214 Output_data_got_powerpc<size, big_endian>* got
5215 = target->got_section(symtab, layout);
5216 if (!gsym->final_value_is_known()
5217 && (gsym->is_from_dynobj()
5218 || gsym->is_undefined()
5219 || gsym->is_preemptible()))
5220 got->add_global_with_rel(gsym, GOT_TYPE_DTPREL,
5221 target->rela_dyn_section(layout),
5222 elfcpp::R_POWERPC_DTPREL);
5224 got->add_global_tls(gsym, GOT_TYPE_DTPREL);
5228 case elfcpp::R_POWERPC_GOT_TPREL16:
5229 case elfcpp::R_POWERPC_GOT_TPREL16_LO:
5230 case elfcpp::R_POWERPC_GOT_TPREL16_HI:
5231 case elfcpp::R_POWERPC_GOT_TPREL16_HA:
5233 const bool final = gsym->final_value_is_known();
5234 const tls::Tls_optimization tls_type = target->optimize_tls_ie(final);
5235 if (tls_type == tls::TLSOPT_NONE)
5237 if (!gsym->has_got_offset(GOT_TYPE_TPREL))
5239 Output_data_got_powerpc<size, big_endian>* got
5240 = target->got_section(symtab, layout);
5241 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
5242 if (gsym->is_undefined()
5243 || gsym->is_from_dynobj())
5245 got->add_global_with_rel(gsym, GOT_TYPE_TPREL, rela_dyn,
5246 elfcpp::R_POWERPC_TPREL);
5250 unsigned int off = got->add_constant(0);
5251 gsym->set_got_offset(GOT_TYPE_TPREL, off);
5252 unsigned int dynrel = elfcpp::R_POWERPC_TPREL;
5253 rela_dyn->add_symbolless_global_addend(gsym, dynrel,
5258 else if (tls_type == tls::TLSOPT_TO_LE)
5260 // no GOT relocs needed for Local Exec.
5268 unsupported_reloc_global(object, r_type, gsym);
5274 case elfcpp::R_POWERPC_GOT_TLSLD16:
5275 case elfcpp::R_POWERPC_GOT_TLSGD16:
5276 case elfcpp::R_POWERPC_GOT_TPREL16:
5277 case elfcpp::R_POWERPC_GOT_DTPREL16:
5278 case elfcpp::R_POWERPC_GOT16:
5279 case elfcpp::R_PPC64_GOT16_DS:
5280 case elfcpp::R_PPC64_TOC16:
5281 case elfcpp::R_PPC64_TOC16_DS:
5282 ppc_object->set_has_small_toc_reloc();
5288 // Process relocations for gc.
5290 template<int size, bool big_endian>
5292 Target_powerpc<size, big_endian>::gc_process_relocs(
5293 Symbol_table* symtab,
5295 Sized_relobj_file<size, big_endian>* object,
5296 unsigned int data_shndx,
5298 const unsigned char* prelocs,
5300 Output_section* output_section,
5301 bool needs_special_offset_handling,
5302 size_t local_symbol_count,
5303 const unsigned char* plocal_symbols)
5305 typedef Target_powerpc<size, big_endian> Powerpc;
5306 typedef typename Target_powerpc<size, big_endian>::Scan Scan;
5307 Powerpc_relobj<size, big_endian>* ppc_object
5308 = static_cast<Powerpc_relobj<size, big_endian>*>(object);
5310 ppc_object->set_opd_valid();
5311 if (size == 64 && data_shndx == ppc_object->opd_shndx())
5313 typename Powerpc_relobj<size, big_endian>::Access_from::iterator p;
5314 for (p = ppc_object->access_from_map()->begin();
5315 p != ppc_object->access_from_map()->end();
5318 Address dst_off = p->first;
5319 unsigned int dst_indx = ppc_object->get_opd_ent(dst_off);
5320 typename Powerpc_relobj<size, big_endian>::Section_refs::iterator s;
5321 for (s = p->second.begin(); s != p->second.end(); ++s)
5323 Object* src_obj = s->first;
5324 unsigned int src_indx = s->second;
5325 symtab->gc()->add_reference(src_obj, src_indx,
5326 ppc_object, dst_indx);
5330 ppc_object->access_from_map()->clear();
5331 ppc_object->process_gc_mark(symtab);
5332 // Don't look at .opd relocs as .opd will reference everything.
5336 gold::gc_process_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan,
5337 typename Target_powerpc::Relocatable_size_for_reloc>(
5346 needs_special_offset_handling,
5351 // Handle target specific gc actions when adding a gc reference from
5352 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
5353 // and DST_OFF. For powerpc64, this adds a referenc to the code
5354 // section of a function descriptor.
5356 template<int size, bool big_endian>
5358 Target_powerpc<size, big_endian>::do_gc_add_reference(
5359 Symbol_table* symtab,
5361 unsigned int src_shndx,
5363 unsigned int dst_shndx,
5364 Address dst_off) const
5366 Powerpc_relobj<size, big_endian>* ppc_object
5367 = static_cast<Powerpc_relobj<size, big_endian>*>(dst_obj);
5369 && !ppc_object->is_dynamic()
5370 && dst_shndx == ppc_object->opd_shndx())
5372 if (ppc_object->opd_valid())
5374 dst_shndx = ppc_object->get_opd_ent(dst_off);
5375 symtab->gc()->add_reference(src_obj, src_shndx, dst_obj, dst_shndx);
5379 // If we haven't run scan_opd_relocs, we must delay
5380 // processing this function descriptor reference.
5381 ppc_object->add_reference(src_obj, src_shndx, dst_off);
5386 // Add any special sections for this symbol to the gc work list.
5387 // For powerpc64, this adds the code section of a function
5390 template<int size, bool big_endian>
5392 Target_powerpc<size, big_endian>::do_gc_mark_symbol(
5393 Symbol_table* symtab,
5398 Powerpc_relobj<size, big_endian>* ppc_object
5399 = static_cast<Powerpc_relobj<size, big_endian>*>(sym->object());
5401 unsigned int shndx = sym->shndx(&is_ordinary);
5402 if (is_ordinary && shndx == ppc_object->opd_shndx())
5404 Sized_symbol<size>* gsym = symtab->get_sized_symbol<size>(sym);
5405 Address dst_off = gsym->value();
5406 if (ppc_object->opd_valid())
5408 unsigned int dst_indx = ppc_object->get_opd_ent(dst_off);
5409 symtab->gc()->worklist().push(Section_id(ppc_object, dst_indx));
5412 ppc_object->add_gc_mark(dst_off);
5417 // Scan relocations for a section.
5419 template<int size, bool big_endian>
5421 Target_powerpc<size, big_endian>::scan_relocs(
5422 Symbol_table* symtab,
5424 Sized_relobj_file<size, big_endian>* object,
5425 unsigned int data_shndx,
5426 unsigned int sh_type,
5427 const unsigned char* prelocs,
5429 Output_section* output_section,
5430 bool needs_special_offset_handling,
5431 size_t local_symbol_count,
5432 const unsigned char* plocal_symbols)
5434 typedef Target_powerpc<size, big_endian> Powerpc;
5435 typedef typename Target_powerpc<size, big_endian>::Scan Scan;
5437 if (sh_type == elfcpp::SHT_REL)
5439 gold_error(_("%s: unsupported REL reloc section"),
5440 object->name().c_str());
5444 gold::scan_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan>(
5453 needs_special_offset_handling,
5458 // Functor class for processing the global symbol table.
5459 // Removes symbols defined on discarded opd entries.
5461 template<bool big_endian>
5462 class Global_symbol_visitor_opd
5465 Global_symbol_visitor_opd()
5469 operator()(Sized_symbol<64>* sym)
5471 if (sym->has_symtab_index()
5472 || sym->source() != Symbol::FROM_OBJECT
5473 || !sym->in_real_elf())
5476 Powerpc_relobj<64, big_endian>* symobj
5477 = static_cast<Powerpc_relobj<64, big_endian>*>(sym->object());
5478 if (symobj->is_dynamic()
5479 || symobj->opd_shndx() == 0)
5483 unsigned int shndx = sym->shndx(&is_ordinary);
5484 if (shndx == symobj->opd_shndx()
5485 && symobj->get_opd_discard(sym->value()))
5486 sym->set_symtab_index(-1U);
5490 template<int size, bool big_endian>
5492 Target_powerpc<size, big_endian>::define_save_restore_funcs(
5494 Symbol_table* symtab)
5498 Output_data_save_res<64, big_endian>* savres
5499 = new Output_data_save_res<64, big_endian>(symtab);
5500 layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS,
5501 elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR,
5502 savres, ORDER_TEXT, false);
5506 // Sort linker created .got section first (for the header), then input
5507 // sections belonging to files using small model code.
5509 template<bool big_endian>
5510 class Sort_toc_sections
5514 operator()(const Output_section::Input_section& is1,
5515 const Output_section::Input_section& is2) const
5517 if (!is1.is_input_section() && is2.is_input_section())
5520 = (is1.is_input_section()
5521 && (static_cast<const Powerpc_relobj<64, big_endian>*>(is1.relobj())
5522 ->has_small_toc_reloc()));
5524 = (is2.is_input_section()
5525 && (static_cast<const Powerpc_relobj<64, big_endian>*>(is2.relobj())
5526 ->has_small_toc_reloc()));
5527 return small1 && !small2;
5531 // Finalize the sections.
5533 template<int size, bool big_endian>
5535 Target_powerpc<size, big_endian>::do_finalize_sections(
5537 const Input_objects*,
5538 Symbol_table* symtab)
5540 if (parameters->doing_static_link())
5542 // At least some versions of glibc elf-init.o have a strong
5543 // reference to __rela_iplt marker syms. A weak ref would be
5545 if (this->iplt_ != NULL)
5547 Reloc_section* rel = this->iplt_->rel_plt();
5548 symtab->define_in_output_data("__rela_iplt_start", NULL,
5549 Symbol_table::PREDEFINED, rel, 0, 0,
5550 elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
5551 elfcpp::STV_HIDDEN, 0, false, true);
5552 symtab->define_in_output_data("__rela_iplt_end", NULL,
5553 Symbol_table::PREDEFINED, rel, 0, 0,
5554 elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
5555 elfcpp::STV_HIDDEN, 0, true, true);
5559 symtab->define_as_constant("__rela_iplt_start", NULL,
5560 Symbol_table::PREDEFINED, 0, 0,
5561 elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
5562 elfcpp::STV_HIDDEN, 0, true, false);
5563 symtab->define_as_constant("__rela_iplt_end", NULL,
5564 Symbol_table::PREDEFINED, 0, 0,
5565 elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
5566 elfcpp::STV_HIDDEN, 0, true, false);
5572 typedef Global_symbol_visitor_opd<big_endian> Symbol_visitor;
5573 symtab->for_all_symbols<64, Symbol_visitor>(Symbol_visitor());
5575 if (!parameters->options().relocatable())
5577 this->define_save_restore_funcs(layout, symtab);
5579 // Annoyingly, we need to make these sections now whether or
5580 // not we need them. If we delay until do_relax then we
5581 // need to mess with the relaxation machinery checkpointing.
5582 this->got_section(symtab, layout);
5583 this->make_brlt_section(layout);
5585 if (parameters->options().toc_sort())
5587 Output_section* os = this->got_->output_section();
5588 if (os != NULL && os->input_sections().size() > 1)
5589 std::stable_sort(os->input_sections().begin(),
5590 os->input_sections().end(),
5591 Sort_toc_sections<big_endian>());
5596 // Fill in some more dynamic tags.
5597 Output_data_dynamic* odyn = layout->dynamic_data();
5600 const Reloc_section* rel_plt = (this->plt_ == NULL
5602 : this->plt_->rel_plt());
5603 layout->add_target_dynamic_tags(false, this->plt_, rel_plt,
5604 this->rela_dyn_, true, size == 32);
5608 if (this->got_ != NULL)
5610 this->got_->finalize_data_size();
5611 odyn->add_section_plus_offset(elfcpp::DT_PPC_GOT,
5612 this->got_, this->got_->g_o_t());
5617 if (this->glink_ != NULL)
5619 this->glink_->finalize_data_size();
5620 odyn->add_section_plus_offset(elfcpp::DT_PPC64_GLINK,
5622 (this->glink_->pltresolve_size
5628 // Emit any relocs we saved in an attempt to avoid generating COPY
5630 if (this->copy_relocs_.any_saved_relocs())
5631 this->copy_relocs_.emit(this->rela_dyn_section(layout));
5634 // Return TRUE iff INSN is one we expect on a _LO variety toc/got
5638 ok_lo_toc_insn(uint32_t insn)
5640 return ((insn & (0x3f << 26)) == 14u << 26 /* addi */
5641 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
5642 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
5643 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
5644 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
5645 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
5646 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
5647 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
5648 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
5649 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
5650 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
5651 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
5652 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
5653 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
5654 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
5656 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
5657 && ((insn & 3) == 0 || (insn & 3) == 3))
5658 || (insn & (0x3f << 26)) == 12u << 26 /* addic */);
5661 // Return the value to use for a branch relocation.
5663 template<int size, bool big_endian>
5664 typename Target_powerpc<size, big_endian>::Address
5665 Target_powerpc<size, big_endian>::symval_for_branch(
5667 const Sized_symbol<size>* gsym,
5668 Powerpc_relobj<size, big_endian>* object,
5669 unsigned int *dest_shndx)
5675 // If the symbol is defined in an opd section, ie. is a function
5676 // descriptor, use the function descriptor code entry address
5677 Powerpc_relobj<size, big_endian>* symobj = object;
5679 && gsym->source() != Symbol::FROM_OBJECT)
5682 symobj = static_cast<Powerpc_relobj<size, big_endian>*>(gsym->object());
5683 unsigned int shndx = symobj->opd_shndx();
5686 Address opd_addr = symobj->get_output_section_offset(shndx);
5687 gold_assert(opd_addr != invalid_address);
5688 opd_addr += symobj->output_section(shndx)->address();
5689 if (value >= opd_addr && value < opd_addr + symobj->section_size(shndx))
5692 *dest_shndx = symobj->get_opd_ent(value - opd_addr, &sec_off);
5693 Address sec_addr = symobj->get_output_section_offset(*dest_shndx);
5694 gold_assert(sec_addr != invalid_address);
5695 sec_addr += symobj->output_section(*dest_shndx)->address();
5696 value = sec_addr + sec_off;
5701 // Perform a relocation.
5703 template<int size, bool big_endian>
5705 Target_powerpc<size, big_endian>::Relocate::relocate(
5706 const Relocate_info<size, big_endian>* relinfo,
5707 Target_powerpc* target,
5710 const elfcpp::Rela<size, big_endian>& rela,
5711 unsigned int r_type,
5712 const Sized_symbol<size>* gsym,
5713 const Symbol_value<size>* psymval,
5714 unsigned char* view,
5716 section_size_type view_size)
5718 switch (this->maybe_skip_tls_get_addr_call(r_type, gsym))
5720 case Track_tls::NOT_EXPECTED:
5721 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
5722 _("__tls_get_addr call lacks marker reloc"));
5724 case Track_tls::EXPECTED:
5725 // We have already complained.
5727 case Track_tls::SKIP:
5729 case Track_tls::NORMAL:
5733 typedef Powerpc_relocate_functions<size, big_endian> Reloc;
5734 typedef typename elfcpp::Swap<32, big_endian>::Valtype Insn;
5735 Powerpc_relobj<size, big_endian>* const object
5736 = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object);
5738 bool has_plt_value = false;
5739 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
5741 ? use_plt_offset<size>(gsym, Scan::get_reference_flags(r_type))
5742 : object->local_has_plt_offset(r_sym))
5744 Stub_table<size, big_endian>* stub_table
5745 = object->stub_table(relinfo->data_shndx);
5746 if (stub_table == NULL)
5748 // This is a ref from a data section to an ifunc symbol.
5749 if (target->stub_tables().size() != 0)
5750 stub_table = target->stub_tables()[0];
5752 gold_assert(stub_table != NULL);
5755 off = stub_table->find_plt_call_entry(object, gsym, r_type,
5756 rela.get_r_addend());
5758 off = stub_table->find_plt_call_entry(object, r_sym, r_type,
5759 rela.get_r_addend());
5760 gold_assert(off != invalid_address);
5761 value = stub_table->stub_address() + off;
5762 has_plt_value = true;
5765 if (r_type == elfcpp::R_POWERPC_GOT16
5766 || r_type == elfcpp::R_POWERPC_GOT16_LO
5767 || r_type == elfcpp::R_POWERPC_GOT16_HI
5768 || r_type == elfcpp::R_POWERPC_GOT16_HA
5769 || r_type == elfcpp::R_PPC64_GOT16_DS
5770 || r_type == elfcpp::R_PPC64_GOT16_LO_DS)
5774 gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD));
5775 value = gsym->got_offset(GOT_TYPE_STANDARD);
5779 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
5780 gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD));
5781 value = object->local_got_offset(r_sym, GOT_TYPE_STANDARD);
5783 value -= target->got_section()->got_base_offset(object);
5785 else if (r_type == elfcpp::R_PPC64_TOC)
5787 value = (target->got_section()->output_section()->address()
5788 + object->toc_base_offset());
5790 else if (gsym != NULL
5791 && (r_type == elfcpp::R_POWERPC_REL24
5792 || r_type == elfcpp::R_PPC_PLTREL24)
5797 typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype;
5798 Valtype* wv = reinterpret_cast<Valtype*>(view);
5799 bool can_plt_call = false;
5800 if (rela.get_r_offset() + 8 <= view_size)
5802 Valtype insn = elfcpp::Swap<32, big_endian>::readval(wv);
5803 Valtype insn2 = elfcpp::Swap<32, big_endian>::readval(wv + 1);
5806 || insn2 == cror_15_15_15 || insn2 == cror_31_31_31))
5808 elfcpp::Swap<32, big_endian>::writeval(wv + 1, ld_2_1 + 40);
5809 can_plt_call = true;
5814 // If we don't have a branch and link followed by a nop,
5815 // we can't go via the plt because there is no place to
5816 // put a toc restoring instruction.
5817 // Unless we know we won't be returning.
5818 if (strcmp(gsym->name(), "__libc_start_main") == 0)
5819 can_plt_call = true;
5823 // This is not an error in one special case: A self
5824 // call. It isn't possible to cheaply verify we have
5825 // such a call so just check for a call to the same
5828 Address code = value;
5829 if (gsym->source() == Symbol::FROM_OBJECT
5830 && gsym->object() == object)
5832 Address addend = rela.get_r_addend();
5833 unsigned int dest_shndx;
5834 Address opdent = psymval->value(object, addend);
5835 code = target->symval_for_branch(opdent, gsym, object,
5838 if (dest_shndx == 0)
5839 dest_shndx = gsym->shndx(&is_ordinary);
5840 ok = dest_shndx == relinfo->data_shndx;
5844 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
5845 _("call lacks nop, can't restore toc; "
5846 "recompile with -fPIC"));
5852 else if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
5853 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO
5854 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI
5855 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA)
5857 // First instruction of a global dynamic sequence, arg setup insn.
5858 const bool final = gsym == NULL || gsym->final_value_is_known();
5859 const tls::Tls_optimization tls_type = target->optimize_tls_gd(final);
5860 enum Got_type got_type = GOT_TYPE_STANDARD;
5861 if (tls_type == tls::TLSOPT_NONE)
5862 got_type = GOT_TYPE_TLSGD;
5863 else if (tls_type == tls::TLSOPT_TO_IE)
5864 got_type = GOT_TYPE_TPREL;
5865 if (got_type != GOT_TYPE_STANDARD)
5869 gold_assert(gsym->has_got_offset(got_type));
5870 value = gsym->got_offset(got_type);
5874 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
5875 gold_assert(object->local_has_got_offset(r_sym, got_type));
5876 value = object->local_got_offset(r_sym, got_type);
5878 value -= target->got_section()->got_base_offset(object);
5880 if (tls_type == tls::TLSOPT_TO_IE)
5882 if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
5883 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO)
5885 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
5886 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
5887 insn &= (1 << 26) - (1 << 16); // extract rt,ra from addi
5889 insn |= 32 << 26; // lwz
5891 insn |= 58 << 26; // ld
5892 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
5894 r_type += (elfcpp::R_POWERPC_GOT_TPREL16
5895 - elfcpp::R_POWERPC_GOT_TLSGD16);
5897 else if (tls_type == tls::TLSOPT_TO_LE)
5899 if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
5900 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO)
5902 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
5903 Insn insn = addis_3_13;
5906 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
5907 r_type = elfcpp::R_POWERPC_TPREL16_HA;
5908 value = psymval->value(object, rela.get_r_addend());
5912 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
5914 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
5915 r_type = elfcpp::R_POWERPC_NONE;
5919 else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16
5920 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO
5921 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI
5922 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA)
5924 // First instruction of a local dynamic sequence, arg setup insn.
5925 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
5926 if (tls_type == tls::TLSOPT_NONE)
5928 value = target->tlsld_got_offset();
5929 value -= target->got_section()->got_base_offset(object);
5933 gold_assert(tls_type == tls::TLSOPT_TO_LE);
5934 if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16
5935 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO)
5937 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
5938 Insn insn = addis_3_13;
5941 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
5942 r_type = elfcpp::R_POWERPC_TPREL16_HA;
5947 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
5949 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
5950 r_type = elfcpp::R_POWERPC_NONE;
5954 else if (r_type == elfcpp::R_POWERPC_GOT_DTPREL16
5955 || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_LO
5956 || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HI
5957 || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HA)
5959 // Accesses relative to a local dynamic sequence address,
5960 // no optimisation here.
5963 gold_assert(gsym->has_got_offset(GOT_TYPE_DTPREL));
5964 value = gsym->got_offset(GOT_TYPE_DTPREL);
5968 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
5969 gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_DTPREL));
5970 value = object->local_got_offset(r_sym, GOT_TYPE_DTPREL);
5972 value -= target->got_section()->got_base_offset(object);
5974 else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16
5975 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO
5976 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI
5977 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA)
5979 // First instruction of initial exec sequence.
5980 const bool final = gsym == NULL || gsym->final_value_is_known();
5981 const tls::Tls_optimization tls_type = target->optimize_tls_ie(final);
5982 if (tls_type == tls::TLSOPT_NONE)
5986 gold_assert(gsym->has_got_offset(GOT_TYPE_TPREL));
5987 value = gsym->got_offset(GOT_TYPE_TPREL);
5991 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
5992 gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_TPREL));
5993 value = object->local_got_offset(r_sym, GOT_TYPE_TPREL);
5995 value -= target->got_section()->got_base_offset(object);
5999 gold_assert(tls_type == tls::TLSOPT_TO_LE);
6000 if (r_type == elfcpp::R_POWERPC_GOT_TPREL16
6001 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO)
6003 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
6004 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
6005 insn &= (1 << 26) - (1 << 21); // extract rt from ld
6010 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
6011 r_type = elfcpp::R_POWERPC_TPREL16_HA;
6012 value = psymval->value(object, rela.get_r_addend());
6016 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
6018 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
6019 r_type = elfcpp::R_POWERPC_NONE;
6023 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD)
6024 || (size == 32 && r_type == elfcpp::R_PPC_TLSGD))
6026 // Second instruction of a global dynamic sequence,
6027 // the __tls_get_addr call
6028 this->expect_tls_get_addr_call(relinfo, relnum, rela.get_r_offset());
6029 const bool final = gsym == NULL || gsym->final_value_is_known();
6030 const tls::Tls_optimization tls_type = target->optimize_tls_gd(final);
6031 if (tls_type != tls::TLSOPT_NONE)
6033 if (tls_type == tls::TLSOPT_TO_IE)
6035 Insn* iview = reinterpret_cast<Insn*>(view);
6036 Insn insn = add_3_3_13;
6039 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
6040 r_type = elfcpp::R_POWERPC_NONE;
6044 Insn* iview = reinterpret_cast<Insn*>(view);
6045 Insn insn = addi_3_3;
6046 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
6047 r_type = elfcpp::R_POWERPC_TPREL16_LO;
6048 view += 2 * big_endian;
6049 value = psymval->value(object, rela.get_r_addend());
6051 this->skip_next_tls_get_addr_call();
6054 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD)
6055 || (size == 32 && r_type == elfcpp::R_PPC_TLSLD))
6057 // Second instruction of a local dynamic sequence,
6058 // the __tls_get_addr call
6059 this->expect_tls_get_addr_call(relinfo, relnum, rela.get_r_offset());
6060 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
6061 if (tls_type == tls::TLSOPT_TO_LE)
6063 Insn* iview = reinterpret_cast<Insn*>(view);
6064 Insn insn = addi_3_3;
6065 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
6066 this->skip_next_tls_get_addr_call();
6067 r_type = elfcpp::R_POWERPC_TPREL16_LO;
6068 view += 2 * big_endian;
6072 else if (r_type == elfcpp::R_POWERPC_TLS)
6074 // Second instruction of an initial exec sequence
6075 const bool final = gsym == NULL || gsym->final_value_is_known();
6076 const tls::Tls_optimization tls_type = target->optimize_tls_ie(final);
6077 if (tls_type == tls::TLSOPT_TO_LE)
6079 Insn* iview = reinterpret_cast<Insn*>(view);
6080 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
6081 unsigned int reg = size == 32 ? 2 : 13;
6082 insn = at_tls_transform(insn, reg);
6083 gold_assert(insn != 0);
6084 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
6085 r_type = elfcpp::R_POWERPC_TPREL16_LO;
6086 view += 2 * big_endian;
6087 value = psymval->value(object, rela.get_r_addend());
6090 else if (!has_plt_value)
6093 unsigned int dest_shndx;
6094 if (r_type != elfcpp::R_PPC_PLTREL24)
6095 addend = rela.get_r_addend();
6096 value = psymval->value(object, addend);
6097 if (size == 64 && is_branch_reloc(r_type))
6098 value = target->symval_for_branch(value, gsym, object, &dest_shndx);
6099 unsigned int max_branch_offset = 0;
6100 if (r_type == elfcpp::R_POWERPC_REL24
6101 || r_type == elfcpp::R_PPC_PLTREL24
6102 || r_type == elfcpp::R_PPC_LOCAL24PC)
6103 max_branch_offset = 1 << 25;
6104 else if (r_type == elfcpp::R_POWERPC_REL14
6105 || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN
6106 || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN)
6107 max_branch_offset = 1 << 15;
6108 if (max_branch_offset != 0
6109 && value - address + max_branch_offset >= 2 * max_branch_offset)
6111 Stub_table<size, big_endian>* stub_table
6112 = object->stub_table(relinfo->data_shndx);
6113 gold_assert(stub_table != NULL);
6114 Address off = stub_table->find_long_branch_entry(object, value);
6115 if (off != invalid_address)
6116 value = stub_table->stub_address() + stub_table->plt_size() + off;
6122 case elfcpp::R_PPC64_REL64:
6123 case elfcpp::R_POWERPC_REL32:
6124 case elfcpp::R_POWERPC_REL24:
6125 case elfcpp::R_PPC_PLTREL24:
6126 case elfcpp::R_PPC_LOCAL24PC:
6127 case elfcpp::R_POWERPC_REL16:
6128 case elfcpp::R_POWERPC_REL16_LO:
6129 case elfcpp::R_POWERPC_REL16_HI:
6130 case elfcpp::R_POWERPC_REL16_HA:
6131 case elfcpp::R_POWERPC_REL14:
6132 case elfcpp::R_POWERPC_REL14_BRTAKEN:
6133 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
6137 case elfcpp::R_PPC64_TOC16:
6138 case elfcpp::R_PPC64_TOC16_LO:
6139 case elfcpp::R_PPC64_TOC16_HI:
6140 case elfcpp::R_PPC64_TOC16_HA:
6141 case elfcpp::R_PPC64_TOC16_DS:
6142 case elfcpp::R_PPC64_TOC16_LO_DS:
6143 // Subtract the TOC base address.
6144 value -= (target->got_section()->output_section()->address()
6145 + object->toc_base_offset());
6148 case elfcpp::R_POWERPC_SECTOFF:
6149 case elfcpp::R_POWERPC_SECTOFF_LO:
6150 case elfcpp::R_POWERPC_SECTOFF_HI:
6151 case elfcpp::R_POWERPC_SECTOFF_HA:
6152 case elfcpp::R_PPC64_SECTOFF_DS:
6153 case elfcpp::R_PPC64_SECTOFF_LO_DS:
6155 value -= os->address();
6158 case elfcpp::R_PPC64_TPREL16_DS:
6159 case elfcpp::R_PPC64_TPREL16_LO_DS:
6161 // R_PPC_TLSGD and R_PPC_TLSLD
6163 case elfcpp::R_POWERPC_TPREL16:
6164 case elfcpp::R_POWERPC_TPREL16_LO:
6165 case elfcpp::R_POWERPC_TPREL16_HI:
6166 case elfcpp::R_POWERPC_TPREL16_HA:
6167 case elfcpp::R_POWERPC_TPREL:
6168 case elfcpp::R_PPC64_TPREL16_HIGHER:
6169 case elfcpp::R_PPC64_TPREL16_HIGHERA:
6170 case elfcpp::R_PPC64_TPREL16_HIGHEST:
6171 case elfcpp::R_PPC64_TPREL16_HIGHESTA:
6172 // tls symbol values are relative to tls_segment()->vaddr()
6176 case elfcpp::R_PPC64_DTPREL16_DS:
6177 case elfcpp::R_PPC64_DTPREL16_LO_DS:
6178 case elfcpp::R_PPC64_DTPREL16_HIGHER:
6179 case elfcpp::R_PPC64_DTPREL16_HIGHERA:
6180 case elfcpp::R_PPC64_DTPREL16_HIGHEST:
6181 case elfcpp::R_PPC64_DTPREL16_HIGHESTA:
6183 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO
6184 // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16
6186 case elfcpp::R_POWERPC_DTPREL16:
6187 case elfcpp::R_POWERPC_DTPREL16_LO:
6188 case elfcpp::R_POWERPC_DTPREL16_HI:
6189 case elfcpp::R_POWERPC_DTPREL16_HA:
6190 case elfcpp::R_POWERPC_DTPREL:
6191 // tls symbol values are relative to tls_segment()->vaddr()
6192 value -= dtp_offset;
6199 Insn branch_bit = 0;
6202 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
6203 case elfcpp::R_POWERPC_REL14_BRTAKEN:
6204 branch_bit = 1 << 21;
6205 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
6206 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
6208 Insn* iview = reinterpret_cast<Insn*>(view);
6209 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
6212 if (this->is_isa_v2)
6214 // Set 'a' bit. This is 0b00010 in BO field for branch
6215 // on CR(BI) insns (BO == 001at or 011at), and 0b01000
6216 // for branch on CTR insns (BO == 1a00t or 1a01t).
6217 if ((insn & (0x14 << 21)) == (0x04 << 21))
6219 else if ((insn & (0x14 << 21)) == (0x10 << 21))
6226 // Invert 'y' bit if not the default.
6227 if (static_cast<Signed_address>(value) < 0)
6230 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
6240 // Multi-instruction sequences that access the TOC can be
6241 // optimized, eg. addis ra,r2,0; addi rb,ra,x;
6242 // to nop; addi rb,r2,x;
6248 case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
6249 case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
6250 case elfcpp::R_POWERPC_GOT_TPREL16_HA:
6251 case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
6252 case elfcpp::R_POWERPC_GOT16_HA:
6253 case elfcpp::R_PPC64_TOC16_HA:
6254 if (parameters->options().toc_optimize())
6256 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
6257 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
6258 if ((insn & ((0x3f << 26) | 0x1f << 16))
6259 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
6260 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
6261 _("toc optimization is not supported "
6262 "for %#08x instruction"), insn);
6263 else if (value + 0x8000 < 0x10000)
6265 elfcpp::Swap<32, big_endian>::writeval(iview, nop);
6271 case elfcpp::R_POWERPC_GOT_TLSLD16_LO:
6272 case elfcpp::R_POWERPC_GOT_TLSGD16_LO:
6273 case elfcpp::R_POWERPC_GOT_TPREL16_LO:
6274 case elfcpp::R_POWERPC_GOT_DTPREL16_LO:
6275 case elfcpp::R_POWERPC_GOT16_LO:
6276 case elfcpp::R_PPC64_GOT16_LO_DS:
6277 case elfcpp::R_PPC64_TOC16_LO:
6278 case elfcpp::R_PPC64_TOC16_LO_DS:
6279 if (parameters->options().toc_optimize())
6281 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
6282 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
6283 if (!ok_lo_toc_insn(insn))
6284 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
6285 _("toc optimization is not supported "
6286 "for %#08x instruction"), insn);
6287 else if (value + 0x8000 < 0x10000)
6289 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
6291 // Transform addic to addi when we change reg.
6292 insn &= ~((0x3f << 26) | (0x1f << 16));
6293 insn |= (14u << 26) | (2 << 16);
6297 insn &= ~(0x1f << 16);
6300 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
6307 typename Reloc::Overflow_check overflow = Reloc::CHECK_NONE;
6310 case elfcpp::R_POWERPC_ADDR32:
6311 case elfcpp::R_POWERPC_UADDR32:
6313 overflow = Reloc::CHECK_BITFIELD;
6316 case elfcpp::R_POWERPC_REL32:
6318 overflow = Reloc::CHECK_SIGNED;
6321 case elfcpp::R_POWERPC_ADDR24:
6322 case elfcpp::R_POWERPC_ADDR16:
6323 case elfcpp::R_POWERPC_UADDR16:
6324 case elfcpp::R_PPC64_ADDR16_DS:
6325 case elfcpp::R_POWERPC_ADDR14:
6326 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
6327 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
6328 overflow = Reloc::CHECK_BITFIELD;
6331 case elfcpp::R_POWERPC_REL24:
6332 case elfcpp::R_PPC_PLTREL24:
6333 case elfcpp::R_PPC_LOCAL24PC:
6334 case elfcpp::R_POWERPC_REL16:
6335 case elfcpp::R_PPC64_TOC16:
6336 case elfcpp::R_POWERPC_GOT16:
6337 case elfcpp::R_POWERPC_SECTOFF:
6338 case elfcpp::R_POWERPC_TPREL16:
6339 case elfcpp::R_POWERPC_DTPREL16:
6340 case elfcpp::R_PPC64_TPREL16_DS:
6341 case elfcpp::R_PPC64_DTPREL16_DS:
6342 case elfcpp::R_PPC64_TOC16_DS:
6343 case elfcpp::R_PPC64_GOT16_DS:
6344 case elfcpp::R_PPC64_SECTOFF_DS:
6345 case elfcpp::R_POWERPC_REL14:
6346 case elfcpp::R_POWERPC_REL14_BRTAKEN:
6347 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
6348 case elfcpp::R_POWERPC_GOT_TLSGD16:
6349 case elfcpp::R_POWERPC_GOT_TLSLD16:
6350 case elfcpp::R_POWERPC_GOT_TPREL16:
6351 case elfcpp::R_POWERPC_GOT_DTPREL16:
6352 overflow = Reloc::CHECK_SIGNED;
6356 typename Powerpc_relocate_functions<size, big_endian>::Status status
6357 = Powerpc_relocate_functions<size, big_endian>::STATUS_OK;
6360 case elfcpp::R_POWERPC_NONE:
6361 case elfcpp::R_POWERPC_TLS:
6362 case elfcpp::R_POWERPC_GNU_VTINHERIT:
6363 case elfcpp::R_POWERPC_GNU_VTENTRY:
6364 case elfcpp::R_PPC_EMB_MRKREF:
6367 case elfcpp::R_PPC64_ADDR64:
6368 case elfcpp::R_PPC64_REL64:
6369 case elfcpp::R_PPC64_TOC:
6370 Reloc::addr64(view, value);
6373 case elfcpp::R_POWERPC_TPREL:
6374 case elfcpp::R_POWERPC_DTPREL:
6376 Reloc::addr64(view, value);
6378 status = Reloc::addr32(view, value, overflow);
6381 case elfcpp::R_PPC64_UADDR64:
6382 Reloc::addr64_u(view, value);
6385 case elfcpp::R_POWERPC_ADDR32:
6386 status = Reloc::addr32(view, value, overflow);
6389 case elfcpp::R_POWERPC_REL32:
6390 case elfcpp::R_POWERPC_UADDR32:
6391 status = Reloc::addr32_u(view, value, overflow);
6394 case elfcpp::R_POWERPC_ADDR24:
6395 case elfcpp::R_POWERPC_REL24:
6396 case elfcpp::R_PPC_PLTREL24:
6397 case elfcpp::R_PPC_LOCAL24PC:
6398 status = Reloc::addr24(view, value, overflow);
6401 case elfcpp::R_POWERPC_GOT_DTPREL16:
6402 case elfcpp::R_POWERPC_GOT_DTPREL16_LO:
6405 status = Reloc::addr16_ds(view, value, overflow);
6408 case elfcpp::R_POWERPC_ADDR16:
6409 case elfcpp::R_POWERPC_REL16:
6410 case elfcpp::R_PPC64_TOC16:
6411 case elfcpp::R_POWERPC_GOT16:
6412 case elfcpp::R_POWERPC_SECTOFF:
6413 case elfcpp::R_POWERPC_TPREL16:
6414 case elfcpp::R_POWERPC_DTPREL16:
6415 case elfcpp::R_POWERPC_GOT_TLSGD16:
6416 case elfcpp::R_POWERPC_GOT_TLSLD16:
6417 case elfcpp::R_POWERPC_GOT_TPREL16:
6418 case elfcpp::R_POWERPC_ADDR16_LO:
6419 case elfcpp::R_POWERPC_REL16_LO:
6420 case elfcpp::R_PPC64_TOC16_LO:
6421 case elfcpp::R_POWERPC_GOT16_LO:
6422 case elfcpp::R_POWERPC_SECTOFF_LO:
6423 case elfcpp::R_POWERPC_TPREL16_LO:
6424 case elfcpp::R_POWERPC_DTPREL16_LO:
6425 case elfcpp::R_POWERPC_GOT_TLSGD16_LO:
6426 case elfcpp::R_POWERPC_GOT_TLSLD16_LO:
6427 case elfcpp::R_POWERPC_GOT_TPREL16_LO:
6428 status = Reloc::addr16(view, value, overflow);
6431 case elfcpp::R_POWERPC_UADDR16:
6432 status = Reloc::addr16_u(view, value, overflow);
6435 case elfcpp::R_POWERPC_ADDR16_HI:
6436 case elfcpp::R_POWERPC_REL16_HI:
6437 case elfcpp::R_PPC64_TOC16_HI:
6438 case elfcpp::R_POWERPC_GOT16_HI:
6439 case elfcpp::R_POWERPC_SECTOFF_HI:
6440 case elfcpp::R_POWERPC_TPREL16_HI:
6441 case elfcpp::R_POWERPC_DTPREL16_HI:
6442 case elfcpp::R_POWERPC_GOT_TLSGD16_HI:
6443 case elfcpp::R_POWERPC_GOT_TLSLD16_HI:
6444 case elfcpp::R_POWERPC_GOT_TPREL16_HI:
6445 case elfcpp::R_POWERPC_GOT_DTPREL16_HI:
6446 Reloc::addr16_hi(view, value);
6449 case elfcpp::R_POWERPC_ADDR16_HA:
6450 case elfcpp::R_POWERPC_REL16_HA:
6451 case elfcpp::R_PPC64_TOC16_HA:
6452 case elfcpp::R_POWERPC_GOT16_HA:
6453 case elfcpp::R_POWERPC_SECTOFF_HA:
6454 case elfcpp::R_POWERPC_TPREL16_HA:
6455 case elfcpp::R_POWERPC_DTPREL16_HA:
6456 case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
6457 case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
6458 case elfcpp::R_POWERPC_GOT_TPREL16_HA:
6459 case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
6460 Reloc::addr16_ha(view, value);
6463 case elfcpp::R_PPC64_DTPREL16_HIGHER:
6465 // R_PPC_EMB_NADDR16_LO
6467 case elfcpp::R_PPC64_ADDR16_HIGHER:
6468 case elfcpp::R_PPC64_TPREL16_HIGHER:
6469 Reloc::addr16_hi2(view, value);
6472 case elfcpp::R_PPC64_DTPREL16_HIGHERA:
6474 // R_PPC_EMB_NADDR16_HI
6476 case elfcpp::R_PPC64_ADDR16_HIGHERA:
6477 case elfcpp::R_PPC64_TPREL16_HIGHERA:
6478 Reloc::addr16_ha2(view, value);
6481 case elfcpp::R_PPC64_DTPREL16_HIGHEST:
6483 // R_PPC_EMB_NADDR16_HA
6485 case elfcpp::R_PPC64_ADDR16_HIGHEST:
6486 case elfcpp::R_PPC64_TPREL16_HIGHEST:
6487 Reloc::addr16_hi3(view, value);
6490 case elfcpp::R_PPC64_DTPREL16_HIGHESTA:
6494 case elfcpp::R_PPC64_ADDR16_HIGHESTA:
6495 case elfcpp::R_PPC64_TPREL16_HIGHESTA:
6496 Reloc::addr16_ha3(view, value);
6499 case elfcpp::R_PPC64_DTPREL16_DS:
6500 case elfcpp::R_PPC64_DTPREL16_LO_DS:
6502 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16
6504 case elfcpp::R_PPC64_TPREL16_DS:
6505 case elfcpp::R_PPC64_TPREL16_LO_DS:
6507 // R_PPC_TLSGD, R_PPC_TLSLD
6509 case elfcpp::R_PPC64_ADDR16_DS:
6510 case elfcpp::R_PPC64_ADDR16_LO_DS:
6511 case elfcpp::R_PPC64_TOC16_DS:
6512 case elfcpp::R_PPC64_TOC16_LO_DS:
6513 case elfcpp::R_PPC64_GOT16_DS:
6514 case elfcpp::R_PPC64_GOT16_LO_DS:
6515 case elfcpp::R_PPC64_SECTOFF_DS:
6516 case elfcpp::R_PPC64_SECTOFF_LO_DS:
6517 status = Reloc::addr16_ds(view, value, overflow);
6520 case elfcpp::R_POWERPC_ADDR14:
6521 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
6522 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
6523 case elfcpp::R_POWERPC_REL14:
6524 case elfcpp::R_POWERPC_REL14_BRTAKEN:
6525 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
6526 status = Reloc::addr14(view, value, overflow);
6529 case elfcpp::R_POWERPC_COPY:
6530 case elfcpp::R_POWERPC_GLOB_DAT:
6531 case elfcpp::R_POWERPC_JMP_SLOT:
6532 case elfcpp::R_POWERPC_RELATIVE:
6533 case elfcpp::R_POWERPC_DTPMOD:
6534 case elfcpp::R_PPC64_JMP_IREL:
6535 case elfcpp::R_POWERPC_IRELATIVE:
6536 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
6537 _("unexpected reloc %u in object file"),
6541 case elfcpp::R_PPC_EMB_SDA21:
6546 // R_PPC64_TOCSAVE. For the time being this can be ignored.
6550 case elfcpp::R_PPC_EMB_SDA2I16:
6551 case elfcpp::R_PPC_EMB_SDA2REL:
6554 // R_PPC64_TLSGD, R_PPC64_TLSLD
6557 case elfcpp::R_POWERPC_PLT32:
6558 case elfcpp::R_POWERPC_PLTREL32:
6559 case elfcpp::R_POWERPC_PLT16_LO:
6560 case elfcpp::R_POWERPC_PLT16_HI:
6561 case elfcpp::R_POWERPC_PLT16_HA:
6562 case elfcpp::R_PPC_SDAREL16:
6563 case elfcpp::R_POWERPC_ADDR30:
6564 case elfcpp::R_PPC64_PLT64:
6565 case elfcpp::R_PPC64_PLTREL64:
6566 case elfcpp::R_PPC64_PLTGOT16:
6567 case elfcpp::R_PPC64_PLTGOT16_LO:
6568 case elfcpp::R_PPC64_PLTGOT16_HI:
6569 case elfcpp::R_PPC64_PLTGOT16_HA:
6570 case elfcpp::R_PPC64_PLT16_LO_DS:
6571 case elfcpp::R_PPC64_PLTGOT16_DS:
6572 case elfcpp::R_PPC64_PLTGOT16_LO_DS:
6573 case elfcpp::R_PPC_EMB_RELSEC16:
6574 case elfcpp::R_PPC_EMB_RELST_LO:
6575 case elfcpp::R_PPC_EMB_RELST_HI:
6576 case elfcpp::R_PPC_EMB_RELST_HA:
6577 case elfcpp::R_PPC_EMB_BIT_FLD:
6578 case elfcpp::R_PPC_EMB_RELSDA:
6579 case elfcpp::R_PPC_TOC16:
6582 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
6583 _("unsupported reloc %u"),
6587 if (status != Powerpc_relocate_functions<size, big_endian>::STATUS_OK)
6588 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
6589 _("relocation overflow"));
6594 // Relocate section data.
6596 template<int size, bool big_endian>
6598 Target_powerpc<size, big_endian>::relocate_section(
6599 const Relocate_info<size, big_endian>* relinfo,
6600 unsigned int sh_type,
6601 const unsigned char* prelocs,
6603 Output_section* output_section,
6604 bool needs_special_offset_handling,
6605 unsigned char* view,
6607 section_size_type view_size,
6608 const Reloc_symbol_changes* reloc_symbol_changes)
6610 typedef Target_powerpc<size, big_endian> Powerpc;
6611 typedef typename Target_powerpc<size, big_endian>::Relocate Powerpc_relocate;
6612 typedef typename Target_powerpc<size, big_endian>::Relocate_comdat_behavior
6613 Powerpc_comdat_behavior;
6615 gold_assert(sh_type == elfcpp::SHT_RELA);
6617 gold::relocate_section<size, big_endian, Powerpc, elfcpp::SHT_RELA,
6618 Powerpc_relocate, Powerpc_comdat_behavior>(
6624 needs_special_offset_handling,
6628 reloc_symbol_changes);
6631 class Powerpc_scan_relocatable_reloc
6634 // Return the strategy to use for a local symbol which is not a
6635 // section symbol, given the relocation type.
6636 inline Relocatable_relocs::Reloc_strategy
6637 local_non_section_strategy(unsigned int r_type, Relobj*, unsigned int r_sym)
6639 if (r_type == 0 && r_sym == 0)
6640 return Relocatable_relocs::RELOC_DISCARD;
6641 return Relocatable_relocs::RELOC_COPY;
6644 // Return the strategy to use for a local symbol which is a section
6645 // symbol, given the relocation type.
6646 inline Relocatable_relocs::Reloc_strategy
6647 local_section_strategy(unsigned int, Relobj*)
6649 return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA;
6652 // Return the strategy to use for a global symbol, given the
6653 // relocation type, the object, and the symbol index.
6654 inline Relocatable_relocs::Reloc_strategy
6655 global_strategy(unsigned int r_type, Relobj*, unsigned int)
6657 if (r_type == elfcpp::R_PPC_PLTREL24)
6658 return Relocatable_relocs::RELOC_SPECIAL;
6659 return Relocatable_relocs::RELOC_COPY;
6663 // Scan the relocs during a relocatable link.
6665 template<int size, bool big_endian>
6667 Target_powerpc<size, big_endian>::scan_relocatable_relocs(
6668 Symbol_table* symtab,
6670 Sized_relobj_file<size, big_endian>* object,
6671 unsigned int data_shndx,
6672 unsigned int sh_type,
6673 const unsigned char* prelocs,
6675 Output_section* output_section,
6676 bool needs_special_offset_handling,
6677 size_t local_symbol_count,
6678 const unsigned char* plocal_symbols,
6679 Relocatable_relocs* rr)
6681 gold_assert(sh_type == elfcpp::SHT_RELA);
6683 gold::scan_relocatable_relocs<size, big_endian, elfcpp::SHT_RELA,
6684 Powerpc_scan_relocatable_reloc>(
6692 needs_special_offset_handling,
6698 // Emit relocations for a section.
6699 // This is a modified version of the function by the same name in
6700 // target-reloc.h. Using relocate_special_relocatable for
6701 // R_PPC_PLTREL24 would require duplication of the entire body of the
6702 // loop, so we may as well duplicate the whole thing.
6704 template<int size, bool big_endian>
6706 Target_powerpc<size, big_endian>::relocate_relocs(
6707 const Relocate_info<size, big_endian>* relinfo,
6708 unsigned int sh_type,
6709 const unsigned char* prelocs,
6711 Output_section* output_section,
6712 typename elfcpp::Elf_types<size>::Elf_Off offset_in_output_section,
6713 const Relocatable_relocs* rr,
6715 Address view_address,
6717 unsigned char* reloc_view,
6718 section_size_type reloc_view_size)
6720 gold_assert(sh_type == elfcpp::SHT_RELA);
6722 typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc
6724 typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc_write
6726 const int reloc_size
6727 = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size;
6729 Powerpc_relobj<size, big_endian>* const object
6730 = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object);
6731 const unsigned int local_count = object->local_symbol_count();
6732 unsigned int got2_shndx = object->got2_shndx();
6733 Address got2_addend = 0;
6734 if (got2_shndx != 0)
6736 got2_addend = object->get_output_section_offset(got2_shndx);
6737 gold_assert(got2_addend != invalid_address);
6740 unsigned char* pwrite = reloc_view;
6741 bool zap_next = false;
6742 for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size)
6744 Relocatable_relocs::Reloc_strategy strategy = rr->strategy(i);
6745 if (strategy == Relocatable_relocs::RELOC_DISCARD)
6748 Reltype reloc(prelocs);
6749 Reltype_write reloc_write(pwrite);
6751 Address offset = reloc.get_r_offset();
6752 typename elfcpp::Elf_types<size>::Elf_WXword r_info = reloc.get_r_info();
6753 unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info);
6754 unsigned int r_type = elfcpp::elf_r_type<size>(r_info);
6755 const unsigned int orig_r_sym = r_sym;
6756 typename elfcpp::Elf_types<size>::Elf_Swxword addend
6757 = reloc.get_r_addend();
6758 const Symbol* gsym = NULL;
6762 // We could arrange to discard these and other relocs for
6763 // tls optimised sequences in the strategy methods, but for
6764 // now do as BFD ld does.
6765 r_type = elfcpp::R_POWERPC_NONE;
6769 // Get the new symbol index.
6770 if (r_sym < local_count)
6774 case Relocatable_relocs::RELOC_COPY:
6775 case Relocatable_relocs::RELOC_SPECIAL:
6778 r_sym = object->symtab_index(r_sym);
6779 gold_assert(r_sym != -1U);
6783 case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA:
6785 // We are adjusting a section symbol. We need to find
6786 // the symbol table index of the section symbol for
6787 // the output section corresponding to input section
6788 // in which this symbol is defined.
6789 gold_assert(r_sym < local_count);
6791 unsigned int shndx =
6792 object->local_symbol_input_shndx(r_sym, &is_ordinary);
6793 gold_assert(is_ordinary);
6794 Output_section* os = object->output_section(shndx);
6795 gold_assert(os != NULL);
6796 gold_assert(os->needs_symtab_index());
6797 r_sym = os->symtab_index();
6807 gsym = object->global_symbol(r_sym);
6808 gold_assert(gsym != NULL);
6809 if (gsym->is_forwarder())
6810 gsym = relinfo->symtab->resolve_forwards(gsym);
6812 gold_assert(gsym->has_symtab_index());
6813 r_sym = gsym->symtab_index();
6816 // Get the new offset--the location in the output section where
6817 // this relocation should be applied.
6818 if (static_cast<Address>(offset_in_output_section) != invalid_address)
6819 offset += offset_in_output_section;
6822 section_offset_type sot_offset =
6823 convert_types<section_offset_type, Address>(offset);
6824 section_offset_type new_sot_offset =
6825 output_section->output_offset(object, relinfo->data_shndx,
6827 gold_assert(new_sot_offset != -1);
6828 offset = new_sot_offset;
6831 // In an object file, r_offset is an offset within the section.
6832 // In an executable or dynamic object, generated by
6833 // --emit-relocs, r_offset is an absolute address.
6834 if (!parameters->options().relocatable())
6836 offset += view_address;
6837 if (static_cast<Address>(offset_in_output_section) != invalid_address)
6838 offset -= offset_in_output_section;
6841 // Handle the reloc addend based on the strategy.
6842 if (strategy == Relocatable_relocs::RELOC_COPY)
6844 else if (strategy == Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA)
6846 const Symbol_value<size>* psymval = object->local_symbol(orig_r_sym);
6847 addend = psymval->value(object, addend);
6849 else if (strategy == Relocatable_relocs::RELOC_SPECIAL)
6851 if (addend >= 32768)
6852 addend += got2_addend;
6857 if (!parameters->options().relocatable())
6859 if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
6860 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO
6861 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI
6862 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA)
6864 // First instruction of a global dynamic sequence,
6866 const bool final = gsym == NULL || gsym->final_value_is_known();
6867 switch (this->optimize_tls_gd(final))
6869 case tls::TLSOPT_TO_IE:
6870 r_type += (elfcpp::R_POWERPC_GOT_TPREL16
6871 - elfcpp::R_POWERPC_GOT_TLSGD16);
6873 case tls::TLSOPT_TO_LE:
6874 if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
6875 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO)
6876 r_type = elfcpp::R_POWERPC_TPREL16_HA;
6879 r_type = elfcpp::R_POWERPC_NONE;
6880 offset -= 2 * big_endian;
6887 else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16
6888 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO
6889 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI
6890 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA)
6892 // First instruction of a local dynamic sequence,
6894 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE)
6896 if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16
6897 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO)
6899 r_type = elfcpp::R_POWERPC_TPREL16_HA;
6900 const Output_section* os = relinfo->layout->tls_segment()
6902 gold_assert(os != NULL);
6903 gold_assert(os->needs_symtab_index());
6904 r_sym = os->symtab_index();
6905 addend = dtp_offset;
6909 r_type = elfcpp::R_POWERPC_NONE;
6910 offset -= 2 * big_endian;
6914 else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16
6915 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO
6916 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI
6917 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA)
6919 // First instruction of initial exec sequence.
6920 const bool final = gsym == NULL || gsym->final_value_is_known();
6921 if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE)
6923 if (r_type == elfcpp::R_POWERPC_GOT_TPREL16
6924 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO)
6925 r_type = elfcpp::R_POWERPC_TPREL16_HA;
6928 r_type = elfcpp::R_POWERPC_NONE;
6929 offset -= 2 * big_endian;
6933 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD)
6934 || (size == 32 && r_type == elfcpp::R_PPC_TLSGD))
6936 // Second instruction of a global dynamic sequence,
6937 // the __tls_get_addr call
6938 const bool final = gsym == NULL || gsym->final_value_is_known();
6939 switch (this->optimize_tls_gd(final))
6941 case tls::TLSOPT_TO_IE:
6942 r_type = elfcpp::R_POWERPC_NONE;
6945 case tls::TLSOPT_TO_LE:
6946 r_type = elfcpp::R_POWERPC_TPREL16_LO;
6947 offset += 2 * big_endian;
6954 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD)
6955 || (size == 32 && r_type == elfcpp::R_PPC_TLSLD))
6957 // Second instruction of a local dynamic sequence,
6958 // the __tls_get_addr call
6959 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE)
6961 const Output_section* os = relinfo->layout->tls_segment()
6963 gold_assert(os != NULL);
6964 gold_assert(os->needs_symtab_index());
6965 r_sym = os->symtab_index();
6966 addend = dtp_offset;
6967 r_type = elfcpp::R_POWERPC_TPREL16_LO;
6968 offset += 2 * big_endian;
6972 else if (r_type == elfcpp::R_POWERPC_TLS)
6974 // Second instruction of an initial exec sequence
6975 const bool final = gsym == NULL || gsym->final_value_is_known();
6976 if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE)
6978 r_type = elfcpp::R_POWERPC_TPREL16_LO;
6979 offset += 2 * big_endian;
6984 reloc_write.put_r_offset(offset);
6985 reloc_write.put_r_info(elfcpp::elf_r_info<size>(r_sym, r_type));
6986 reloc_write.put_r_addend(addend);
6988 pwrite += reloc_size;
6991 gold_assert(static_cast<section_size_type>(pwrite - reloc_view)
6992 == reloc_view_size);
6995 // Return the value to use for a dynamic symbol which requires special
6996 // treatment. This is how we support equality comparisons of function
6997 // pointers across shared library boundaries, as described in the
6998 // processor specific ABI supplement.
7000 template<int size, bool big_endian>
7002 Target_powerpc<size, big_endian>::do_dynsym_value(const Symbol* gsym) const
7006 gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset());
7007 for (typename Stub_tables::const_iterator p = this->stub_tables_.begin();
7008 p != this->stub_tables_.end();
7011 Address off = (*p)->find_plt_call_entry(gsym);
7012 if (off != invalid_address)
7013 return (*p)->stub_address() + off;
7019 // Return the PLT address to use for a local symbol.
7020 template<int size, bool big_endian>
7022 Target_powerpc<size, big_endian>::do_plt_address_for_local(
7023 const Relobj* object,
7024 unsigned int symndx) const
7028 const Sized_relobj<size, big_endian>* relobj
7029 = static_cast<const Sized_relobj<size, big_endian>*>(object);
7030 for (typename Stub_tables::const_iterator p = this->stub_tables_.begin();
7031 p != this->stub_tables_.end();
7034 Address off = (*p)->find_plt_call_entry(relobj->sized_relobj(),
7036 if (off != invalid_address)
7037 return (*p)->stub_address() + off;
7043 // Return the PLT address to use for a global symbol.
7044 template<int size, bool big_endian>
7046 Target_powerpc<size, big_endian>::do_plt_address_for_global(
7047 const Symbol* gsym) const
7051 for (typename Stub_tables::const_iterator p = this->stub_tables_.begin();
7052 p != this->stub_tables_.end();
7055 Address off = (*p)->find_plt_call_entry(gsym);
7056 if (off != invalid_address)
7057 return (*p)->stub_address() + off;
7063 // Return the offset to use for the GOT_INDX'th got entry which is
7064 // for a local tls symbol specified by OBJECT, SYMNDX.
7065 template<int size, bool big_endian>
7067 Target_powerpc<size, big_endian>::do_tls_offset_for_local(
7068 const Relobj* object,
7069 unsigned int symndx,
7070 unsigned int got_indx) const
7072 const Powerpc_relobj<size, big_endian>* ppc_object
7073 = static_cast<const Powerpc_relobj<size, big_endian>*>(object);
7074 if (ppc_object->local_symbol(symndx)->is_tls_symbol())
7076 for (Got_type got_type = GOT_TYPE_TLSGD;
7077 got_type <= GOT_TYPE_TPREL;
7078 got_type = Got_type(got_type + 1))
7079 if (ppc_object->local_has_got_offset(symndx, got_type))
7081 unsigned int off = ppc_object->local_got_offset(symndx, got_type);
7082 if (got_type == GOT_TYPE_TLSGD)
7084 if (off == got_indx * (size / 8))
7086 if (got_type == GOT_TYPE_TPREL)
7096 // Return the offset to use for the GOT_INDX'th got entry which is
7097 // for global tls symbol GSYM.
7098 template<int size, bool big_endian>
7100 Target_powerpc<size, big_endian>::do_tls_offset_for_global(
7102 unsigned int got_indx) const
7104 if (gsym->type() == elfcpp::STT_TLS)
7106 for (Got_type got_type = GOT_TYPE_TLSGD;
7107 got_type <= GOT_TYPE_TPREL;
7108 got_type = Got_type(got_type + 1))
7109 if (gsym->has_got_offset(got_type))
7111 unsigned int off = gsym->got_offset(got_type);
7112 if (got_type == GOT_TYPE_TLSGD)
7114 if (off == got_indx * (size / 8))
7116 if (got_type == GOT_TYPE_TPREL)
7126 // The selector for powerpc object files.
7128 template<int size, bool big_endian>
7129 class Target_selector_powerpc : public Target_selector
7132 Target_selector_powerpc()
7133 : Target_selector(size == 64 ? elfcpp::EM_PPC64 : elfcpp::EM_PPC,
7136 ? (big_endian ? "elf64-powerpc" : "elf64-powerpcle")
7137 : (big_endian ? "elf32-powerpc" : "elf32-powerpcle")),
7139 ? (big_endian ? "elf64ppc" : "elf64lppc")
7140 : (big_endian ? "elf32ppc" : "elf32lppc")))
7144 do_instantiate_target()
7145 { return new Target_powerpc<size, big_endian>(); }
7148 Target_selector_powerpc<32, true> target_selector_ppc32;
7149 Target_selector_powerpc<32, false> target_selector_ppc32le;
7150 Target_selector_powerpc<64, true> target_selector_ppc64;
7151 Target_selector_powerpc<64, false> target_selector_ppc64le;
7153 // Instantiate these constants for -O0
7154 template<int size, bool big_endian>
7155 const int Output_data_glink<size, big_endian>::pltresolve_size;
7156 template<int size, bool big_endian>
7157 const typename Stub_table<size, big_endian>::Address
7158 Stub_table<size, big_endian>::invalid_address;
7159 template<int size, bool big_endian>
7160 const typename Target_powerpc<size, big_endian>::Address
7161 Target_powerpc<size, big_endian>::invalid_address;
7163 } // End anonymous namespace.