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), opd_valid_(false), opd_ent_(), access_from_map_()
80 // The .got2 section shndx.
85 return this->special_;
90 // The .opd section shndx.
97 return this->special_;
100 // Init OPD entry arrays.
102 init_opd(size_t opd_size)
104 size_t count = this->opd_ent_ndx(opd_size);
105 this->opd_ent_.resize(count);
108 // Return section and offset of function entry for .opd + R_OFF.
110 get_opd_ent(Address r_off, Address* value = NULL) const
112 size_t ndx = this->opd_ent_ndx(r_off);
113 gold_assert(ndx < this->opd_ent_.size());
114 gold_assert(this->opd_ent_[ndx].shndx != 0);
116 *value = this->opd_ent_[ndx].off;
117 return this->opd_ent_[ndx].shndx;
120 // Set section and offset of function entry for .opd + R_OFF.
122 set_opd_ent(Address r_off, unsigned int shndx, Address value)
124 size_t ndx = this->opd_ent_ndx(r_off);
125 gold_assert(ndx < this->opd_ent_.size());
126 this->opd_ent_[ndx].shndx = shndx;
127 this->opd_ent_[ndx].off = value;
130 // Return discard flag for .opd + R_OFF.
132 get_opd_discard(Address r_off) const
134 size_t ndx = this->opd_ent_ndx(r_off);
135 gold_assert(ndx < this->opd_ent_.size());
136 return this->opd_ent_[ndx].discard;
139 // Set discard flag for .opd + R_OFF.
141 set_opd_discard(Address r_off)
143 size_t ndx = this->opd_ent_ndx(r_off);
144 gold_assert(ndx < this->opd_ent_.size());
145 this->opd_ent_[ndx].discard = true;
150 { return &this->access_from_map_; }
152 // Add a reference from SRC_OBJ, SRC_INDX to this object's .opd
153 // section at DST_OFF.
155 add_reference(Object* src_obj,
156 unsigned int src_indx,
157 typename elfcpp::Elf_types<size>::Elf_Addr dst_off)
159 Section_id src_id(src_obj, src_indx);
160 this->access_from_map_[dst_off].insert(src_id);
163 // Add a reference to the code section specified by the .opd entry
166 add_gc_mark(typename elfcpp::Elf_types<size>::Elf_Addr dst_off)
168 size_t ndx = this->opd_ent_ndx(dst_off);
169 if (ndx >= this->opd_ent_.size())
170 this->opd_ent_.resize(ndx + 1);
171 this->opd_ent_[ndx].gc_mark = true;
175 process_gc_mark(Symbol_table* symtab)
177 for (size_t i = 0; i < this->opd_ent_.size(); i++)
178 if (this->opd_ent_[i].gc_mark)
180 unsigned int shndx = this->opd_ent_[i].shndx;
181 symtab->gc()->worklist().push(Section_id(this, shndx));
187 { return this->opd_valid_; }
191 { this->opd_valid_ = true; }
193 // Examine .rela.opd to build info about function entry points.
195 scan_opd_relocs(size_t reloc_count,
196 const unsigned char* prelocs,
197 const unsigned char* plocal_syms);
199 // Perform the Sized_relobj_file method, then set up opd info from
202 do_read_relocs(Read_relocs_data*);
205 do_find_special_sections(Read_symbols_data* sd);
207 // Adjust this local symbol value. Return false if the symbol
208 // should be discarded from the output file.
210 do_adjust_local_symbol(Symbol_value<size>* lv) const
212 if (size == 64 && this->opd_shndx() != 0)
215 if (lv->input_shndx(&is_ordinary) != this->opd_shndx())
217 if (this->get_opd_discard(lv->input_value()))
223 // Return offset in output GOT section that this object will use
224 // as a TOC pointer. Won't be just a constant with multi-toc support.
226 toc_base_offset() const
230 set_has_14bit_branch(unsigned int shndx)
232 if (shndx >= this->has14_.size())
233 this->has14_.resize(shndx + 1);
234 this->has14_[shndx] = true;
238 has_14bit_branch(unsigned int shndx) const
239 { return shndx < this->has14_.size() && this->has14_[shndx]; }
242 set_stub_table(unsigned int shndx, Stub_table<size, big_endian>* stub_table)
244 if (shndx >= this->stub_table_.size())
245 this->stub_table_.resize(shndx + 1);
246 this->stub_table_[shndx] = stub_table;
249 Stub_table<size, big_endian>*
250 stub_table(unsigned int shndx)
252 if (shndx < this->stub_table_.size())
253 return this->stub_table_[shndx];
266 // Return index into opd_ent_ array for .opd entry at OFF.
267 // .opd entries are 24 bytes long, but they can be spaced 16 bytes
268 // apart when the language doesn't use the last 8-byte word, the
269 // environment pointer. Thus dividing the entry section offset by
270 // 16 will give an index into opd_ent_ that works for either layout
271 // of .opd. (It leaves some elements of the vector unused when .opd
272 // entries are spaced 24 bytes apart, but we don't know the spacing
273 // until relocations are processed, and in any case it is possible
274 // for an object to have some entries spaced 16 bytes apart and
275 // others 24 bytes apart.)
277 opd_ent_ndx(size_t off) const
280 // For 32-bit the .got2 section shdnx, for 64-bit the .opd section shndx.
281 unsigned int special_;
283 // Set at the start of gc_process_relocs, when we know opd_ent_
284 // vector is valid. The flag could be made atomic and set in
285 // do_read_relocs with memory_order_release and then tested with
286 // memory_order_acquire, potentially resulting in fewer entries in
290 // The first 8-byte word of an OPD entry gives the address of the
291 // entry point of the function. Relocatable object files have a
292 // relocation on this word. The following vector records the
293 // section and offset specified by these relocations.
294 std::vector<Opd_ent> opd_ent_;
296 // References made to this object's .opd section when running
297 // gc_process_relocs for another object, before the opd_ent_ vector
298 // is valid for this object.
299 Access_from access_from_map_;
301 // Whether input section has a 14-bit branch reloc.
302 std::vector<bool> has14_;
304 // The stub table to use for a given input section.
305 std::vector<Stub_table<size, big_endian>*> stub_table_;
308 template<int size, bool big_endian>
309 class Target_powerpc : public Sized_target<size, big_endian>
313 Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Reloc_section;
314 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
315 typedef typename elfcpp::Elf_types<size>::Elf_Swxword Signed_address;
316 static const Address invalid_address = static_cast<Address>(0) - 1;
317 // Offset of tp and dtp pointers from start of TLS block.
318 static const Address tp_offset = 0x7000;
319 static const Address dtp_offset = 0x8000;
322 : Sized_target<size, big_endian>(&powerpc_info),
323 got_(NULL), plt_(NULL), iplt_(NULL), brlt_section_(NULL),
324 glink_(NULL), rela_dyn_(NULL), copy_relocs_(elfcpp::R_POWERPC_COPY),
325 dynbss_(NULL), tlsld_got_offset_(-1U),
326 stub_tables_(), branch_lookup_table_(), branch_info_(),
327 plt_thread_safe_(false)
331 // Process the relocations to determine unreferenced sections for
332 // garbage collection.
334 gc_process_relocs(Symbol_table* symtab,
336 Sized_relobj_file<size, big_endian>* object,
337 unsigned int data_shndx,
338 unsigned int sh_type,
339 const unsigned char* prelocs,
341 Output_section* output_section,
342 bool needs_special_offset_handling,
343 size_t local_symbol_count,
344 const unsigned char* plocal_symbols);
346 // Scan the relocations to look for symbol adjustments.
348 scan_relocs(Symbol_table* symtab,
350 Sized_relobj_file<size, big_endian>* object,
351 unsigned int data_shndx,
352 unsigned int sh_type,
353 const unsigned char* prelocs,
355 Output_section* output_section,
356 bool needs_special_offset_handling,
357 size_t local_symbol_count,
358 const unsigned char* plocal_symbols);
360 // Map input .toc section to output .got section.
362 do_output_section_name(const Relobj*, const char* name, size_t* plen) const
364 if (size == 64 && strcmp(name, ".toc") == 0)
372 // Provide linker defined save/restore functions.
374 define_save_restore_funcs(Layout*, Symbol_table*);
376 // No stubs unless a final link.
379 { return !parameters->options().relocatable(); }
382 do_relax(int, const Input_objects*, Symbol_table*, Layout*, const Task*);
384 // Stash info about branches, for stub generation.
386 push_branch(Powerpc_relobj<size, big_endian>* ppc_object,
387 unsigned int data_shndx, Address r_offset,
388 unsigned int r_type, unsigned int r_sym, Address addend)
390 Branch_info info(ppc_object, data_shndx, r_offset, r_type, r_sym, addend);
391 this->branch_info_.push_back(info);
392 if (r_type == elfcpp::R_POWERPC_REL14
393 || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN
394 || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN)
395 ppc_object->set_has_14bit_branch(data_shndx);
398 Stub_table<size, big_endian>*
402 do_define_standard_symbols(Symbol_table*, Layout*);
404 // Finalize the sections.
406 do_finalize_sections(Layout*, const Input_objects*, Symbol_table*);
408 // Return the value to use for a dynamic which requires special
411 do_dynsym_value(const Symbol*) const;
413 // Return the PLT address to use for a local symbol.
415 do_plt_address_for_local(const Relobj*, unsigned int) const;
417 // Return the PLT address to use for a global symbol.
419 do_plt_address_for_global(const Symbol*) const;
421 // Return the offset to use for the GOT_INDX'th got entry which is
422 // for a local tls symbol specified by OBJECT, SYMNDX.
424 do_tls_offset_for_local(const Relobj* object,
426 unsigned int got_indx) const;
428 // Return the offset to use for the GOT_INDX'th got entry which is
429 // for global tls symbol GSYM.
431 do_tls_offset_for_global(Symbol* gsym, unsigned int got_indx) const;
433 // Relocate a section.
435 relocate_section(const Relocate_info<size, big_endian>*,
436 unsigned int sh_type,
437 const unsigned char* prelocs,
439 Output_section* output_section,
440 bool needs_special_offset_handling,
442 Address view_address,
443 section_size_type view_size,
444 const Reloc_symbol_changes*);
446 // Scan the relocs during a relocatable link.
448 scan_relocatable_relocs(Symbol_table* symtab,
450 Sized_relobj_file<size, big_endian>* object,
451 unsigned int data_shndx,
452 unsigned int sh_type,
453 const unsigned char* prelocs,
455 Output_section* output_section,
456 bool needs_special_offset_handling,
457 size_t local_symbol_count,
458 const unsigned char* plocal_symbols,
459 Relocatable_relocs*);
461 // Emit relocations for a section.
463 relocate_relocs(const Relocate_info<size, big_endian>*,
464 unsigned int sh_type,
465 const unsigned char* prelocs,
467 Output_section* output_section,
468 typename elfcpp::Elf_types<size>::Elf_Off
469 offset_in_output_section,
470 const Relocatable_relocs*,
472 Address view_address,
474 unsigned char* reloc_view,
475 section_size_type reloc_view_size);
477 // Return whether SYM is defined by the ABI.
479 do_is_defined_by_abi(const Symbol* sym) const
481 return strcmp(sym->name(), "__tls_get_addr") == 0;
484 // Return the size of the GOT section.
488 gold_assert(this->got_ != NULL);
489 return this->got_->data_size();
492 // Get the PLT section.
493 const Output_data_plt_powerpc<size, big_endian>*
496 gold_assert(this->plt_ != NULL);
500 // Get the IPLT section.
501 const Output_data_plt_powerpc<size, big_endian>*
504 gold_assert(this->iplt_ != NULL);
508 // Get the .glink section.
509 const Output_data_glink<size, big_endian>*
510 glink_section() const
512 gold_assert(this->glink_ != NULL);
516 // Get the GOT section.
517 const Output_data_got_powerpc<size, big_endian>*
520 gold_assert(this->got_ != NULL);
524 // Get the GOT section, creating it if necessary.
525 Output_data_got_powerpc<size, big_endian>*
526 got_section(Symbol_table*, Layout*);
529 do_make_elf_object(const std::string&, Input_file*, off_t,
530 const elfcpp::Ehdr<size, big_endian>&);
532 // Return the number of entries in the GOT.
534 got_entry_count() const
536 if (this->got_ == NULL)
538 return this->got_size() / (size / 8);
541 // Return the number of entries in the PLT.
543 plt_entry_count() const;
545 // Return the offset of the first non-reserved PLT entry.
547 first_plt_entry_offset() const;
549 // Return the size of each PLT entry.
551 plt_entry_size() const;
553 // Add any special sections for this symbol to the gc work list.
554 // For powerpc64, this adds the code section of a function
557 do_gc_mark_symbol(Symbol_table* symtab, Symbol* sym) const;
559 // Handle target specific gc actions when adding a gc reference from
560 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
561 // and DST_OFF. For powerpc64, this adds a referenc to the code
562 // section of a function descriptor.
564 do_gc_add_reference(Symbol_table* symtab,
566 unsigned int src_shndx,
568 unsigned int dst_shndx,
569 Address dst_off) const;
571 typedef std::vector<Stub_table<size, big_endian>*> Stub_tables;
574 { return this->stub_tables_; }
576 const Output_data_brlt_powerpc<size, big_endian>*
578 { return this->brlt_section_; }
581 add_branch_lookup_table(Address to)
583 unsigned int off = this->branch_lookup_table_.size() * (size / 8);
584 this->branch_lookup_table_.insert(std::make_pair(to, off));
588 find_branch_lookup_table(Address to)
590 typename Branch_lookup_table::const_iterator p
591 = this->branch_lookup_table_.find(to);
592 return p == this->branch_lookup_table_.end() ? invalid_address : p->second;
596 write_branch_lookup_table(unsigned char *oview)
598 for (typename Branch_lookup_table::const_iterator p
599 = this->branch_lookup_table_.begin();
600 p != this->branch_lookup_table_.end();
603 elfcpp::Swap<32, big_endian>::writeval(oview + p->second, p->first);
608 plt_thread_safe() const
609 { return this->plt_thread_safe_; }
613 // The class which scans relocations.
617 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
620 : issued_non_pic_error_(false)
624 get_reference_flags(unsigned int r_type);
627 local(Symbol_table* symtab, Layout* layout, Target_powerpc* target,
628 Sized_relobj_file<size, big_endian>* object,
629 unsigned int data_shndx,
630 Output_section* output_section,
631 const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type,
632 const elfcpp::Sym<size, big_endian>& lsym,
636 global(Symbol_table* symtab, Layout* layout, Target_powerpc* target,
637 Sized_relobj_file<size, big_endian>* object,
638 unsigned int data_shndx,
639 Output_section* output_section,
640 const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type,
644 local_reloc_may_be_function_pointer(Symbol_table* , Layout* ,
646 Sized_relobj_file<size, big_endian>* ,
649 const elfcpp::Rela<size, big_endian>& ,
651 const elfcpp::Sym<size, big_endian>&)
655 global_reloc_may_be_function_pointer(Symbol_table* , Layout* ,
657 Sized_relobj_file<size, big_endian>* ,
660 const elfcpp::Rela<size,
662 unsigned int , Symbol*)
667 unsupported_reloc_local(Sized_relobj_file<size, big_endian>*,
668 unsigned int r_type);
671 unsupported_reloc_global(Sized_relobj_file<size, big_endian>*,
672 unsigned int r_type, Symbol*);
675 generate_tls_call(Symbol_table* symtab, Layout* layout,
676 Target_powerpc* target);
679 check_non_pic(Relobj*, unsigned int r_type);
682 reloc_needs_plt_for_ifunc(Sized_relobj_file<size, big_endian>* object,
683 unsigned int r_type);
685 // Whether we have issued an error about a non-PIC compilation.
686 bool issued_non_pic_error_;
690 symval_for_branch(Address value, const Sized_symbol<size>* gsym,
691 Powerpc_relobj<size, big_endian>* object,
692 unsigned int *dest_shndx);
694 // The class which implements relocation.
698 // Use 'at' branch hints when true, 'y' when false.
699 // FIXME maybe: set this with an option.
700 static const bool is_isa_v2 = true;
704 CALL_NOT_EXPECTED = 0,
710 : call_tls_get_addr_(CALL_NOT_EXPECTED)
715 if (this->call_tls_get_addr_ != CALL_NOT_EXPECTED)
717 // FIXME: This needs to specify the location somehow.
718 gold_error(_("missing expected __tls_get_addr call"));
722 // Do a relocation. Return false if the caller should not issue
723 // any warnings about this relocation.
725 relocate(const Relocate_info<size, big_endian>*, Target_powerpc*,
726 Output_section*, size_t relnum,
727 const elfcpp::Rela<size, big_endian>&,
728 unsigned int r_type, const Sized_symbol<size>*,
729 const Symbol_value<size>*,
731 typename elfcpp::Elf_types<size>::Elf_Addr,
734 // This is set if we should skip the next reloc, which should be a
735 // call to __tls_get_addr.
736 enum skip_tls call_tls_get_addr_;
739 class Relocate_comdat_behavior
742 // Decide what the linker should do for relocations that refer to
743 // discarded comdat sections.
744 inline Comdat_behavior
745 get(const char* name)
747 gold::Default_comdat_behavior default_behavior;
748 Comdat_behavior ret = default_behavior.get(name);
749 if (ret == CB_WARNING)
752 && (strcmp(name, ".fixup") == 0
753 || strcmp(name, ".got2") == 0))
756 && (strcmp(name, ".opd") == 0
757 || strcmp(name, ".toc") == 0
758 || strcmp(name, ".toc1") == 0))
765 // A class which returns the size required for a relocation type,
766 // used while scanning relocs during a relocatable link.
767 class Relocatable_size_for_reloc
771 get_size_for_reloc(unsigned int, Relobj*)
778 // Optimize the TLS relocation type based on what we know about the
779 // symbol. IS_FINAL is true if the final address of this symbol is
780 // known at link time.
782 tls::Tls_optimization
783 optimize_tls_gd(bool is_final)
785 // If we are generating a shared library, then we can't do anything
787 if (parameters->options().shared())
788 return tls::TLSOPT_NONE;
791 return tls::TLSOPT_TO_IE;
792 return tls::TLSOPT_TO_LE;
795 tls::Tls_optimization
798 if (parameters->options().shared())
799 return tls::TLSOPT_NONE;
801 return tls::TLSOPT_TO_LE;
804 tls::Tls_optimization
805 optimize_tls_ie(bool is_final)
807 if (!is_final || parameters->options().shared())
808 return tls::TLSOPT_NONE;
810 return tls::TLSOPT_TO_LE;
815 make_glink_section(Layout*);
817 // Create the PLT section.
819 make_plt_section(Symbol_table*, Layout*);
822 make_iplt_section(Symbol_table*, Layout*);
825 make_brlt_section(Layout*);
827 // Create a PLT entry for a global symbol.
829 make_plt_entry(Symbol_table*, Layout*, Symbol*);
831 // Create a PLT entry for a local IFUNC symbol.
833 make_local_ifunc_plt_entry(Symbol_table*, Layout*,
834 Sized_relobj_file<size, big_endian>*,
838 // Create a GOT entry for local dynamic __tls_get_addr.
840 tlsld_got_offset(Symbol_table* symtab, Layout* layout,
841 Sized_relobj_file<size, big_endian>* object);
844 tlsld_got_offset() const
846 return this->tlsld_got_offset_;
849 // Get the dynamic reloc section, creating it if necessary.
851 rela_dyn_section(Layout*);
853 // Copy a relocation against a global symbol.
855 copy_reloc(Symbol_table* symtab, Layout* layout,
856 Sized_relobj_file<size, big_endian>* object,
857 unsigned int shndx, Output_section* output_section,
858 Symbol* sym, const elfcpp::Rela<size, big_endian>& reloc)
860 this->copy_relocs_.copy_reloc(symtab, layout,
861 symtab->get_sized_symbol<size>(sym),
862 object, shndx, output_section,
863 reloc, this->rela_dyn_section(layout));
866 // Look over all the input sections, deciding where to place stub.
868 group_sections(Layout*, const Task*);
870 // Sort output sections by address.
874 operator()(const Output_section* sec1, const Output_section* sec2)
875 { return sec1->address() < sec2->address(); }
881 Branch_info(Powerpc_relobj<size, big_endian>* ppc_object,
882 unsigned int data_shndx,
887 : object_(ppc_object), shndx_(data_shndx), offset_(r_offset),
888 r_type_(r_type), r_sym_(r_sym), addend_(addend)
894 // If this branch needs a plt call stub, or a long branch stub, make one.
896 make_stub(Stub_table<size, big_endian>*,
897 Stub_table<size, big_endian>*,
898 Symbol_table*) const;
901 // The branch location..
902 Powerpc_relobj<size, big_endian>* object_;
905 // ..and the branch type and destination.
906 unsigned int r_type_;
911 // Information about this specific target which we pass to the
912 // general Target structure.
913 static Target::Target_info powerpc_info;
915 // The types of GOT entries needed for this platform.
916 // These values are exposed to the ABI in an incremental link.
917 // Do not renumber existing values without changing the version
918 // number of the .gnu_incremental_inputs section.
922 GOT_TYPE_TLSGD, // double entry for @got@tlsgd
923 GOT_TYPE_DTPREL, // entry for @got@dtprel
924 GOT_TYPE_TPREL // entry for @got@tprel
928 Output_data_got_powerpc<size, big_endian>* got_;
930 Output_data_plt_powerpc<size, big_endian>* plt_;
932 Output_data_plt_powerpc<size, big_endian>* iplt_;
933 // Section holding long branch destinations.
934 Output_data_brlt_powerpc<size, big_endian>* brlt_section_;
935 // The .glink section.
936 Output_data_glink<size, big_endian>* glink_;
937 // The dynamic reloc section.
938 Reloc_section* rela_dyn_;
939 // Relocs saved to avoid a COPY reloc.
940 Copy_relocs<elfcpp::SHT_RELA, size, big_endian> copy_relocs_;
941 // Space for variables copied with a COPY reloc.
942 Output_data_space* dynbss_;
943 // Offset of the GOT entry for local dynamic __tls_get_addr calls.
944 unsigned int tlsld_got_offset_;
946 Stub_tables stub_tables_;
947 typedef Unordered_map<Address, unsigned int> Branch_lookup_table;
948 Branch_lookup_table branch_lookup_table_;
950 typedef std::vector<Branch_info> Branches;
951 Branches branch_info_;
953 bool plt_thread_safe_;
957 Target::Target_info Target_powerpc<32, true>::powerpc_info =
960 true, // is_big_endian
961 elfcpp::EM_PPC, // machine_code
962 false, // has_make_symbol
963 false, // has_resolve
964 false, // has_code_fill
965 true, // is_default_stack_executable
966 false, // can_icf_inline_merge_sections
968 "/usr/lib/ld.so.1", // dynamic_linker
969 0x10000000, // default_text_segment_address
970 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
971 4 * 1024, // common_pagesize (overridable by -z common-page-size)
972 false, // isolate_execinstr
974 elfcpp::SHN_UNDEF, // small_common_shndx
975 elfcpp::SHN_UNDEF, // large_common_shndx
976 0, // small_common_section_flags
977 0, // large_common_section_flags
978 NULL, // attributes_section
979 NULL // attributes_vendor
983 Target::Target_info Target_powerpc<32, false>::powerpc_info =
986 false, // is_big_endian
987 elfcpp::EM_PPC, // machine_code
988 false, // has_make_symbol
989 false, // has_resolve
990 false, // has_code_fill
991 true, // is_default_stack_executable
992 false, // can_icf_inline_merge_sections
994 "/usr/lib/ld.so.1", // dynamic_linker
995 0x10000000, // default_text_segment_address
996 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
997 4 * 1024, // common_pagesize (overridable by -z common-page-size)
998 false, // isolate_execinstr
1000 elfcpp::SHN_UNDEF, // small_common_shndx
1001 elfcpp::SHN_UNDEF, // large_common_shndx
1002 0, // small_common_section_flags
1003 0, // large_common_section_flags
1004 NULL, // attributes_section
1005 NULL // attributes_vendor
1009 Target::Target_info Target_powerpc<64, true>::powerpc_info =
1012 true, // is_big_endian
1013 elfcpp::EM_PPC64, // machine_code
1014 false, // has_make_symbol
1015 false, // has_resolve
1016 false, // has_code_fill
1017 true, // is_default_stack_executable
1018 false, // can_icf_inline_merge_sections
1020 "/usr/lib/ld.so.1", // dynamic_linker
1021 0x10000000, // default_text_segment_address
1022 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1023 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1024 false, // isolate_execinstr
1026 elfcpp::SHN_UNDEF, // small_common_shndx
1027 elfcpp::SHN_UNDEF, // large_common_shndx
1028 0, // small_common_section_flags
1029 0, // large_common_section_flags
1030 NULL, // attributes_section
1031 NULL // attributes_vendor
1035 Target::Target_info Target_powerpc<64, false>::powerpc_info =
1038 false, // is_big_endian
1039 elfcpp::EM_PPC64, // machine_code
1040 false, // has_make_symbol
1041 false, // has_resolve
1042 false, // has_code_fill
1043 true, // is_default_stack_executable
1044 false, // can_icf_inline_merge_sections
1046 "/usr/lib/ld.so.1", // dynamic_linker
1047 0x10000000, // default_text_segment_address
1048 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
1049 4 * 1024, // common_pagesize (overridable by -z common-page-size)
1050 false, // isolate_execinstr
1052 elfcpp::SHN_UNDEF, // small_common_shndx
1053 elfcpp::SHN_UNDEF, // large_common_shndx
1054 0, // small_common_section_flags
1055 0, // large_common_section_flags
1056 NULL, // attributes_section
1057 NULL // attributes_vendor
1061 is_branch_reloc(unsigned int r_type)
1063 return (r_type == elfcpp::R_POWERPC_REL24
1064 || r_type == elfcpp::R_PPC_PLTREL24
1065 || r_type == elfcpp::R_PPC_LOCAL24PC
1066 || r_type == elfcpp::R_POWERPC_REL14
1067 || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN
1068 || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN
1069 || r_type == elfcpp::R_POWERPC_ADDR24
1070 || r_type == elfcpp::R_POWERPC_ADDR14
1071 || r_type == elfcpp::R_POWERPC_ADDR14_BRTAKEN
1072 || r_type == elfcpp::R_POWERPC_ADDR14_BRNTAKEN);
1075 // If INSN is an opcode that may be used with an @tls operand, return
1076 // the transformed insn for TLS optimisation, otherwise return 0. If
1077 // REG is non-zero only match an insn with RB or RA equal to REG.
1079 at_tls_transform(uint32_t insn, unsigned int reg)
1081 if ((insn & (0x3f << 26)) != 31 << 26)
1085 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
1086 rtra = insn & ((1 << 26) - (1 << 16));
1087 else if (((insn >> 16) & 0x1f) == reg)
1088 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
1092 if ((insn & (0x3ff << 1)) == 266 << 1)
1095 else if ((insn & (0x1f << 1)) == 23 << 1
1096 && ((insn & (0x1f << 6)) < 14 << 6
1097 || ((insn & (0x1f << 6)) >= 16 << 6
1098 && (insn & (0x1f << 6)) < 24 << 6)))
1099 // load and store indexed -> dform
1100 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
1101 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
1102 // ldx, ldux, stdx, stdux -> ld, ldu, std, stdu
1103 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
1104 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
1106 insn = (58 << 26) | 2;
1113 // Modified version of symtab.h class Symbol member
1114 // Given a direct absolute or pc-relative static relocation against
1115 // the global symbol, this function returns whether a dynamic relocation
1120 needs_dynamic_reloc(const Symbol* gsym, int flags)
1122 // No dynamic relocations in a static link!
1123 if (parameters->doing_static_link())
1126 // A reference to an undefined symbol from an executable should be
1127 // statically resolved to 0, and does not need a dynamic relocation.
1128 // This matches gnu ld behavior.
1129 if (gsym->is_undefined() && !parameters->options().shared())
1132 // A reference to an absolute symbol does not need a dynamic relocation.
1133 if (gsym->is_absolute())
1136 // An absolute reference within a position-independent output file
1137 // will need a dynamic relocation.
1138 if ((flags & Symbol::ABSOLUTE_REF)
1139 && parameters->options().output_is_position_independent())
1142 // A function call that can branch to a local PLT entry does not need
1143 // a dynamic relocation.
1144 if ((flags & Symbol::FUNCTION_CALL) && gsym->has_plt_offset())
1147 // A reference to any PLT entry in a non-position-independent executable
1148 // does not need a dynamic relocation.
1149 // Except due to having function descriptors on powerpc64 we don't define
1150 // functions to their plt code in an executable, so this doesn't apply.
1152 && !parameters->options().output_is_position_independent()
1153 && gsym->has_plt_offset())
1156 // A reference to a symbol defined in a dynamic object or to a
1157 // symbol that is preemptible will need a dynamic relocation.
1158 if (gsym->is_from_dynobj()
1159 || gsym->is_undefined()
1160 || gsym->is_preemptible())
1163 // For all other cases, return FALSE.
1167 // Modified version of symtab.h class Symbol member
1168 // Whether we should use the PLT offset associated with a symbol for
1169 // a relocation. FLAGS is a set of Reference_flags.
1173 use_plt_offset(const Symbol* gsym, int flags)
1175 // If the symbol doesn't have a PLT offset, then naturally we
1176 // don't want to use it.
1177 if (!gsym->has_plt_offset())
1180 // For a STT_GNU_IFUNC symbol we always have to use the PLT entry.
1181 if (gsym->type() == elfcpp::STT_GNU_IFUNC)
1184 // If we are going to generate a dynamic relocation, then we will
1185 // wind up using that, so no need to use the PLT entry.
1186 if (needs_dynamic_reloc<size>(gsym, flags))
1189 // If the symbol is from a dynamic object, we need to use the PLT
1191 if (gsym->is_from_dynobj())
1194 // If we are generating a shared object, and this symbol is
1195 // undefined or preemptible, we need to use the PLT entry.
1196 if (parameters->options().shared()
1197 && (gsym->is_undefined() || gsym->is_preemptible()))
1200 // If this is a call to a weak undefined symbol, we need to use
1201 // the PLT entry; the symbol may be defined by a library loaded
1203 if ((flags & Symbol::FUNCTION_CALL) && gsym->is_weak_undefined())
1206 // Otherwise we can use the regular definition.
1210 template<int size, bool big_endian>
1211 class Powerpc_relocate_functions
1228 typedef Powerpc_relocate_functions<size, big_endian> This;
1229 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
1231 template<int valsize>
1233 has_overflow_signed(Address value)
1235 // limit = 1 << (valsize - 1) without shift count exceeding size of type
1236 Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1);
1237 limit <<= ((valsize - 1) >> 1);
1238 limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1));
1239 return value + limit > (limit << 1) - 1;
1242 template<int valsize>
1244 has_overflow_bitfield(Address value)
1246 Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1);
1247 limit <<= ((valsize - 1) >> 1);
1248 limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1));
1249 return value > (limit << 1) - 1 && value + limit > (limit << 1) - 1;
1252 template<int valsize>
1253 static inline Status
1254 overflowed(Address value, Overflow_check overflow)
1256 if (overflow == CHECK_SIGNED)
1258 if (has_overflow_signed<valsize>(value))
1259 return STATUS_OVERFLOW;
1261 else if (overflow == CHECK_BITFIELD)
1263 if (has_overflow_bitfield<valsize>(value))
1264 return STATUS_OVERFLOW;
1269 // Do a simple RELA relocation
1270 template<int valsize>
1271 static inline Status
1272 rela(unsigned char* view, Address value, Overflow_check overflow)
1274 typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype;
1275 Valtype* wv = reinterpret_cast<Valtype*>(view);
1276 elfcpp::Swap<valsize, big_endian>::writeval(wv, value);
1277 return overflowed<valsize>(value, overflow);
1280 template<int valsize>
1281 static inline Status
1282 rela(unsigned char* view,
1283 unsigned int right_shift,
1284 typename elfcpp::Valtype_base<valsize>::Valtype dst_mask,
1286 Overflow_check overflow)
1288 typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype;
1289 Valtype* wv = reinterpret_cast<Valtype*>(view);
1290 Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv);
1291 Valtype reloc = value >> right_shift;
1294 elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc);
1295 return overflowed<valsize>(value >> right_shift, overflow);
1298 // Do a simple RELA relocation, unaligned.
1299 template<int valsize>
1300 static inline Status
1301 rela_ua(unsigned char* view, Address value, Overflow_check overflow)
1303 elfcpp::Swap_unaligned<valsize, big_endian>::writeval(view, value);
1304 return overflowed<valsize>(value, overflow);
1307 template<int valsize>
1308 static inline Status
1309 rela_ua(unsigned char* view,
1310 unsigned int right_shift,
1311 typename elfcpp::Valtype_base<valsize>::Valtype dst_mask,
1313 Overflow_check overflow)
1315 typedef typename elfcpp::Swap_unaligned<valsize, big_endian>::Valtype
1317 Valtype val = elfcpp::Swap<valsize, big_endian>::readval(view);
1318 Valtype reloc = value >> right_shift;
1321 elfcpp::Swap_unaligned<valsize, big_endian>::writeval(view, val | reloc);
1322 return overflowed<valsize>(value >> right_shift, overflow);
1326 // R_PPC64_ADDR64: (Symbol + Addend)
1328 addr64(unsigned char* view, Address value)
1329 { This::template rela<64>(view, value, CHECK_NONE); }
1331 // R_PPC64_UADDR64: (Symbol + Addend) unaligned
1333 addr64_u(unsigned char* view, Address value)
1334 { This::template rela_ua<64>(view, value, CHECK_NONE); }
1336 // R_POWERPC_ADDR32: (Symbol + Addend)
1337 static inline Status
1338 addr32(unsigned char* view, Address value, Overflow_check overflow)
1339 { return This::template rela<32>(view, value, overflow); }
1341 // R_POWERPC_UADDR32: (Symbol + Addend) unaligned
1342 static inline Status
1343 addr32_u(unsigned char* view, Address value, Overflow_check overflow)
1344 { return This::template rela_ua<32>(view, value, overflow); }
1346 // R_POWERPC_ADDR24: (Symbol + Addend) & 0x3fffffc
1347 static inline Status
1348 addr24(unsigned char* view, Address value, Overflow_check overflow)
1350 Status stat = This::template rela<32>(view, 0, 0x03fffffc, value, overflow);
1351 if (overflow != CHECK_NONE && (value & 3) != 0)
1352 stat = STATUS_OVERFLOW;
1356 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff
1357 static inline Status
1358 addr16(unsigned char* view, Address value, Overflow_check overflow)
1359 { return This::template rela<16>(view, value, overflow); }
1361 // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff, unaligned
1362 static inline Status
1363 addr16_u(unsigned char* view, Address value, Overflow_check overflow)
1364 { return This::template rela_ua<16>(view, value, overflow); }
1366 // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc
1367 static inline Status
1368 addr16_ds(unsigned char* view, Address value, Overflow_check overflow)
1370 Status stat = This::template rela<16>(view, 0, 0xfffc, value, overflow);
1371 if (overflow != CHECK_NONE && (value & 3) != 0)
1372 stat = STATUS_OVERFLOW;
1376 // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff
1378 addr16_hi(unsigned char* view, Address value)
1379 { This::template rela<16>(view, 16, 0xffff, value, CHECK_NONE); }
1381 // R_POWERPC_ADDR16_HA: ((Symbol + Addend + 0x8000) >> 16) & 0xffff
1383 addr16_ha(unsigned char* view, Address value)
1384 { This::addr16_hi(view, value + 0x8000); }
1386 // R_POWERPC_ADDR16_HIGHER: ((Symbol + Addend) >> 32) & 0xffff
1388 addr16_hi2(unsigned char* view, Address value)
1389 { This::template rela<16>(view, 32, 0xffff, value, CHECK_NONE); }
1391 // R_POWERPC_ADDR16_HIGHERA: ((Symbol + Addend + 0x8000) >> 32) & 0xffff
1393 addr16_ha2(unsigned char* view, Address value)
1394 { This::addr16_hi2(view, value + 0x8000); }
1396 // R_POWERPC_ADDR16_HIGHEST: ((Symbol + Addend) >> 48) & 0xffff
1398 addr16_hi3(unsigned char* view, Address value)
1399 { This::template rela<16>(view, 48, 0xffff, value, CHECK_NONE); }
1401 // R_POWERPC_ADDR16_HIGHESTA: ((Symbol + Addend + 0x8000) >> 48) & 0xffff
1403 addr16_ha3(unsigned char* view, Address value)
1404 { This::addr16_hi3(view, value + 0x8000); }
1406 // R_POWERPC_ADDR14: (Symbol + Addend) & 0xfffc
1407 static inline Status
1408 addr14(unsigned char* view, Address value, Overflow_check overflow)
1410 Status stat = This::template rela<32>(view, 0, 0xfffc, value, overflow);
1411 if (overflow != CHECK_NONE && (value & 3) != 0)
1412 stat = STATUS_OVERFLOW;
1417 // Stash away the index of .got2 or .opd in a relocatable object, if
1418 // such a section exists.
1420 template<int size, bool big_endian>
1422 Powerpc_relobj<size, big_endian>::do_find_special_sections(
1423 Read_symbols_data* sd)
1425 const unsigned char* const pshdrs = sd->section_headers->data();
1426 const unsigned char* namesu = sd->section_names->data();
1427 const char* names = reinterpret_cast<const char*>(namesu);
1428 section_size_type names_size = sd->section_names_size;
1429 const unsigned char* s;
1431 s = this->find_shdr(pshdrs, size == 32 ? ".got2" : ".opd",
1432 names, names_size, NULL);
1435 unsigned int ndx = (s - pshdrs) / elfcpp::Elf_sizes<size>::shdr_size;
1436 this->special_ = ndx;
1438 return Sized_relobj_file<size, big_endian>::do_find_special_sections(sd);
1441 // Examine .rela.opd to build info about function entry points.
1443 template<int size, bool big_endian>
1445 Powerpc_relobj<size, big_endian>::scan_opd_relocs(
1447 const unsigned char* prelocs,
1448 const unsigned char* plocal_syms)
1452 typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc
1454 const int reloc_size
1455 = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size;
1456 const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
1457 Address expected_off = 0;
1458 bool regular = true;
1459 unsigned int opd_ent_size = 0;
1461 for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size)
1463 Reltype reloc(prelocs);
1464 typename elfcpp::Elf_types<size>::Elf_WXword r_info
1465 = reloc.get_r_info();
1466 unsigned int r_type = elfcpp::elf_r_type<size>(r_info);
1467 if (r_type == elfcpp::R_PPC64_ADDR64)
1469 unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info);
1470 typename elfcpp::Elf_types<size>::Elf_Addr value;
1473 if (r_sym < this->local_symbol_count())
1475 typename elfcpp::Sym<size, big_endian>
1476 lsym(plocal_syms + r_sym * sym_size);
1477 shndx = lsym.get_st_shndx();
1478 shndx = this->adjust_sym_shndx(r_sym, shndx, &is_ordinary);
1479 value = lsym.get_st_value();
1482 shndx = this->symbol_section_and_value(r_sym, &value,
1484 this->set_opd_ent(reloc.get_r_offset(), shndx,
1485 value + reloc.get_r_addend());
1488 expected_off = reloc.get_r_offset();
1489 opd_ent_size = expected_off;
1491 else if (expected_off != reloc.get_r_offset())
1493 expected_off += opd_ent_size;
1495 else if (r_type == elfcpp::R_PPC64_TOC)
1497 if (expected_off - opd_ent_size + 8 != reloc.get_r_offset())
1502 gold_warning(_("%s: unexpected reloc type %u in .opd section"),
1503 this->name().c_str(), r_type);
1507 if (reloc_count <= 2)
1508 opd_ent_size = this->section_size(this->opd_shndx());
1509 if (opd_ent_size != 24 && opd_ent_size != 16)
1513 gold_warning(_("%s: .opd is not a regular array of opd entries"),
1514 this->name().c_str());
1520 template<int size, bool big_endian>
1522 Powerpc_relobj<size, big_endian>::do_read_relocs(Read_relocs_data* rd)
1524 Sized_relobj_file<size, big_endian>::do_read_relocs(rd);
1527 for (Read_relocs_data::Relocs_list::iterator p = rd->relocs.begin();
1528 p != rd->relocs.end();
1531 if (p->data_shndx == this->opd_shndx())
1533 uint64_t opd_size = this->section_size(this->opd_shndx());
1534 gold_assert(opd_size == static_cast<size_t>(opd_size));
1537 this->init_opd(opd_size);
1538 this->scan_opd_relocs(p->reloc_count, p->contents->data(),
1539 rd->local_symbols->data());
1547 // Set up some symbols.
1549 template<int size, bool big_endian>
1551 Target_powerpc<size, big_endian>::do_define_standard_symbols(
1552 Symbol_table* symtab,
1557 // Define _GLOBAL_OFFSET_TABLE_ to ensure it isn't seen as
1558 // undefined when scanning relocs (and thus requires
1559 // non-relative dynamic relocs). The proper value will be
1561 Symbol *gotsym = symtab->lookup("_GLOBAL_OFFSET_TABLE_", NULL);
1562 if (gotsym != NULL && gotsym->is_undefined())
1564 Target_powerpc<size, big_endian>* target =
1565 static_cast<Target_powerpc<size, big_endian>*>(
1566 parameters->sized_target<size, big_endian>());
1567 Output_data_got_powerpc<size, big_endian>* got
1568 = target->got_section(symtab, layout);
1569 symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL,
1570 Symbol_table::PREDEFINED,
1574 elfcpp::STV_HIDDEN, 0,
1578 // Define _SDA_BASE_ at the start of the .sdata section + 32768.
1579 Symbol *sdasym = symtab->lookup("_SDA_BASE_", NULL);
1580 if (sdasym != NULL && sdasym->is_undefined())
1582 Output_data_space* sdata = new Output_data_space(4, "** sdata");
1584 = layout->add_output_section_data(".sdata", 0,
1586 | elfcpp::SHF_WRITE,
1587 sdata, ORDER_SMALL_DATA, false);
1588 symtab->define_in_output_data("_SDA_BASE_", NULL,
1589 Symbol_table::PREDEFINED,
1590 os, 32768, 0, elfcpp::STT_OBJECT,
1591 elfcpp::STB_LOCAL, elfcpp::STV_HIDDEN,
1597 // Set up PowerPC target specific relobj.
1599 template<int size, bool big_endian>
1601 Target_powerpc<size, big_endian>::do_make_elf_object(
1602 const std::string& name,
1603 Input_file* input_file,
1604 off_t offset, const elfcpp::Ehdr<size, big_endian>& ehdr)
1606 int et = ehdr.get_e_type();
1607 // ET_EXEC files are valid input for --just-symbols/-R,
1608 // and we treat them as relocatable objects.
1609 if (et == elfcpp::ET_REL
1610 || (et == elfcpp::ET_EXEC && input_file->just_symbols()))
1612 Powerpc_relobj<size, big_endian>* obj =
1613 new Powerpc_relobj<size, big_endian>(name, input_file, offset, ehdr);
1617 else if (et == elfcpp::ET_DYN)
1619 Sized_dynobj<size, big_endian>* obj =
1620 new Sized_dynobj<size, big_endian>(name, input_file, offset, ehdr);
1626 gold_error(_("%s: unsupported ELF file type %d"), name.c_str(), et);
1631 template<int size, bool big_endian>
1632 class Output_data_got_powerpc : public Output_data_got<size, big_endian>
1635 typedef typename elfcpp::Elf_types<size>::Elf_Addr Valtype;
1636 typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Rela_dyn;
1638 Output_data_got_powerpc(Symbol_table* symtab, Layout* layout)
1639 : Output_data_got<size, big_endian>(),
1640 symtab_(symtab), layout_(layout),
1641 header_ent_cnt_(size == 32 ? 3 : 1),
1642 header_index_(size == 32 ? 0x2000 : 0)
1647 // Create a new GOT entry and return its offset.
1649 add_got_entry(Got_entry got_entry)
1651 this->reserve_ent();
1652 return Output_data_got<size, big_endian>::add_got_entry(got_entry);
1655 // Create a pair of new GOT entries and return the offset of the first.
1657 add_got_entry_pair(Got_entry got_entry_1, Got_entry got_entry_2)
1659 this->reserve_ent(2);
1660 return Output_data_got<size, big_endian>::add_got_entry_pair(got_entry_1,
1665 add_constant_pair(Valtype c1, Valtype c2)
1667 this->reserve_ent(2);
1668 unsigned int got_offset = this->add_constant(c1);
1669 this->add_constant(c2);
1673 // Offset of _GLOBAL_OFFSET_TABLE_.
1677 return this->got_offset(this->header_index_);
1680 // Offset of base used to access the GOT/TOC.
1681 // The got/toc pointer reg will be set to this value.
1683 got_base_offset(const Powerpc_relobj<size, big_endian>* object) const
1686 return this->g_o_t();
1688 return (this->output_section()->address()
1689 + object->toc_base_offset()
1693 // Ensure our GOT has a header.
1695 set_final_data_size()
1697 if (this->header_ent_cnt_ != 0)
1698 this->make_header();
1699 Output_data_got<size, big_endian>::set_final_data_size();
1702 // First word of GOT header needs some values that are not
1703 // handled by Output_data_got so poke them in here.
1704 // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase.
1706 do_write(Output_file* of)
1709 if (size == 32 && this->layout_->dynamic_data() != NULL)
1710 val = this->layout_->dynamic_section()->address();
1712 val = this->output_section()->address() + 0x8000;
1713 this->replace_constant(this->header_index_, val);
1714 Output_data_got<size, big_endian>::do_write(of);
1719 reserve_ent(unsigned int cnt = 1)
1721 if (this->header_ent_cnt_ == 0)
1723 if (this->num_entries() + cnt > this->header_index_)
1724 this->make_header();
1730 this->header_ent_cnt_ = 0;
1731 this->header_index_ = this->num_entries();
1734 Output_data_got<size, big_endian>::add_constant(0);
1735 Output_data_got<size, big_endian>::add_constant(0);
1736 Output_data_got<size, big_endian>::add_constant(0);
1738 // Define _GLOBAL_OFFSET_TABLE_ at the header
1739 Symbol *gotsym = this->symtab_->lookup("_GLOBAL_OFFSET_TABLE_", NULL);
1742 Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(gotsym);
1743 sym->set_value(this->g_o_t());
1746 this->symtab_->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL,
1747 Symbol_table::PREDEFINED,
1748 this, this->g_o_t(), 0,
1751 elfcpp::STV_HIDDEN, 0,
1755 Output_data_got<size, big_endian>::add_constant(0);
1758 // Stashed pointers.
1759 Symbol_table* symtab_;
1763 unsigned int header_ent_cnt_;
1764 // GOT header index.
1765 unsigned int header_index_;
1768 // Get the GOT section, creating it if necessary.
1770 template<int size, bool big_endian>
1771 Output_data_got_powerpc<size, big_endian>*
1772 Target_powerpc<size, big_endian>::got_section(Symbol_table* symtab,
1775 if (this->got_ == NULL)
1777 gold_assert(symtab != NULL && layout != NULL);
1780 = new Output_data_got_powerpc<size, big_endian>(symtab, layout);
1782 layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS,
1783 elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE,
1784 this->got_, ORDER_DATA, false);
1790 // Get the dynamic reloc section, creating it if necessary.
1792 template<int size, bool big_endian>
1793 typename Target_powerpc<size, big_endian>::Reloc_section*
1794 Target_powerpc<size, big_endian>::rela_dyn_section(Layout* layout)
1796 if (this->rela_dyn_ == NULL)
1798 gold_assert(layout != NULL);
1799 this->rela_dyn_ = new Reloc_section(parameters->options().combreloc());
1800 layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA,
1801 elfcpp::SHF_ALLOC, this->rela_dyn_,
1802 ORDER_DYNAMIC_RELOCS, false);
1804 return this->rela_dyn_;
1810 // Determine the stub group size. The group size is the absolute
1811 // value of the parameter --stub-group-size. If --stub-group-size
1812 // is passed a negative value, we restrict stubs to be always before
1813 // the stubbed branches.
1814 Stub_control(int32_t size)
1815 : state_(NO_GROUP), stub_group_size_(abs(size)),
1816 stub14_group_size_(abs(size)),
1817 stubs_always_before_branch_(size < 0), suppress_size_errors_(false),
1818 group_end_addr_(0), owner_(NULL), output_section_(NULL)
1820 if (stub_group_size_ == 1)
1823 if (stubs_always_before_branch_)
1825 stub_group_size_ = 0x1e00000;
1826 stub14_group_size_ = 0x7800;
1830 stub_group_size_ = 0x1c00000;
1831 stub14_group_size_ = 0x7000;
1833 suppress_size_errors_ = true;
1837 // Return true iff input section can be handled by current stub
1840 can_add_to_stub_group(Output_section* o,
1841 const Output_section::Input_section* i,
1844 const Output_section::Input_section*
1850 { return output_section_; }
1856 FINDING_STUB_SECTION,
1861 uint32_t stub_group_size_;
1862 uint32_t stub14_group_size_;
1863 bool stubs_always_before_branch_;
1864 bool suppress_size_errors_;
1865 uint64_t group_end_addr_;
1866 const Output_section::Input_section* owner_;
1867 Output_section* output_section_;
1870 // Return true iff input section can be handled by current stub/
1874 Stub_control::can_add_to_stub_group(Output_section* o,
1875 const Output_section::Input_section* i,
1879 = has14 ? this->stub14_group_size_ : this->stub_group_size_;
1880 bool whole_sec = o->order() == ORDER_INIT || o->order() == ORDER_FINI;
1882 uint64_t start_addr = o->address();
1885 // .init and .fini sections are pasted together to form a single
1886 // function. We can't be adding stubs in the middle of the function.
1887 this_size = o->data_size();
1890 start_addr += i->relobj()->output_section_offset(i->shndx());
1891 this_size = i->data_size();
1893 uint64_t end_addr = start_addr + this_size;
1894 bool toobig = this_size > group_size;
1896 if (toobig && !this->suppress_size_errors_)
1897 gold_warning(_("%s:%s exceeds group size"),
1898 i->relobj()->name().c_str(),
1899 i->relobj()->section_name(i->shndx()).c_str());
1901 if (this->state_ != HAS_STUB_SECTION
1902 && (!whole_sec || this->output_section_ != o))
1905 this->output_section_ = o;
1908 if (this->state_ == NO_GROUP)
1910 this->state_ = FINDING_STUB_SECTION;
1911 this->group_end_addr_ = end_addr;
1913 else if (this->group_end_addr_ - start_addr < group_size)
1915 // Adding this section would make the group larger than GROUP_SIZE.
1916 else if (this->state_ == FINDING_STUB_SECTION
1917 && !this->stubs_always_before_branch_
1920 // But wait, there's more! Input sections up to GROUP_SIZE
1921 // bytes before the stub table can be handled by it too.
1922 this->state_ = HAS_STUB_SECTION;
1923 this->group_end_addr_ = end_addr;
1927 this->state_ = NO_GROUP;
1933 // Look over all the input sections, deciding where to place stubs.
1935 template<int size, bool big_endian>
1937 Target_powerpc<size, big_endian>::group_sections(Layout* layout,
1940 Stub_control stub_control(parameters->options().stub_group_size());
1942 // Group input sections and insert stub table
1943 Stub_table<size, big_endian>* stub_table = NULL;
1944 Layout::Section_list section_list;
1945 layout->get_executable_sections(§ion_list);
1946 std::stable_sort(section_list.begin(), section_list.end(), Sort_sections());
1947 for (Layout::Section_list::reverse_iterator o = section_list.rbegin();
1948 o != section_list.rend();
1951 typedef Output_section::Input_section_list Input_section_list;
1952 for (Input_section_list::const_reverse_iterator i
1953 = (*o)->input_sections().rbegin();
1954 i != (*o)->input_sections().rend();
1957 if (i->is_input_section())
1959 Powerpc_relobj<size, big_endian>* ppcobj = static_cast
1960 <Powerpc_relobj<size, big_endian>*>(i->relobj());
1961 bool has14 = ppcobj->has_14bit_branch(i->shndx());
1962 if (!stub_control.can_add_to_stub_group(*o, &*i, has14))
1964 stub_table->init(stub_control.owner(),
1965 stub_control.output_section());
1968 if (stub_table == NULL)
1969 stub_table = this->new_stub_table();
1970 ppcobj->set_stub_table(i->shndx(), stub_table);
1974 if (stub_table != NULL)
1975 stub_table->init(stub_control.owner(), stub_control.output_section());
1978 // If this branch needs a plt call stub, or a long branch stub, make one.
1980 template<int size, bool big_endian>
1982 Target_powerpc<size, big_endian>::Branch_info::make_stub(
1983 Stub_table<size, big_endian>* stub_table,
1984 Stub_table<size, big_endian>* ifunc_stub_table,
1985 Symbol_table* symtab) const
1987 Symbol* sym = this->object_->global_symbol(this->r_sym_);
1988 if (sym != NULL && sym->is_forwarder())
1989 sym = symtab->resolve_forwards(sym);
1990 const Sized_symbol<size>* gsym = static_cast<const Sized_symbol<size>*>(sym);
1992 ? use_plt_offset<size>(gsym, Scan::get_reference_flags(this->r_type_))
1993 : this->object_->local_has_plt_offset(this->r_sym_))
1995 if (stub_table == NULL)
1996 stub_table = this->object_->stub_table(this->shndx_);
1997 if (stub_table == NULL)
1999 // This is a ref from a data section to an ifunc symbol.
2000 stub_table = ifunc_stub_table;
2002 gold_assert(stub_table != NULL);
2004 stub_table->add_plt_call_entry(this->object_, gsym,
2005 this->r_type_, this->addend_);
2007 stub_table->add_plt_call_entry(this->object_, this->r_sym_,
2008 this->r_type_, this->addend_);
2012 unsigned int max_branch_offset;
2013 if (this->r_type_ == elfcpp::R_POWERPC_REL14
2014 || this->r_type_ == elfcpp::R_POWERPC_REL14_BRTAKEN
2015 || this->r_type_ == elfcpp::R_POWERPC_REL14_BRNTAKEN)
2016 max_branch_offset = 1 << 15;
2017 else if (this->r_type_ == elfcpp::R_POWERPC_REL24
2018 || this->r_type_ == elfcpp::R_PPC_PLTREL24
2019 || this->r_type_ == elfcpp::R_PPC_LOCAL24PC)
2020 max_branch_offset = 1 << 25;
2023 Address from = this->object_->get_output_section_offset(this->shndx_);
2024 gold_assert(from != invalid_address);
2025 from += (this->object_->output_section(this->shndx_)->address()
2030 switch (gsym->source())
2032 case Symbol::FROM_OBJECT:
2034 Object* symobj = gsym->object();
2035 if (symobj->is_dynamic()
2036 || symobj->pluginobj() != NULL)
2039 unsigned int shndx = gsym->shndx(&is_ordinary);
2040 if (shndx == elfcpp::SHN_UNDEF)
2045 case Symbol::IS_UNDEFINED:
2051 Symbol_table::Compute_final_value_status status;
2052 to = symtab->compute_final_value<size>(gsym, &status);
2053 if (status != Symbol_table::CFVS_OK)
2058 const Symbol_value<size>* psymval
2059 = this->object_->local_symbol(this->r_sym_);
2060 Symbol_value<size> symval;
2061 typedef Sized_relobj_file<size, big_endian> ObjType;
2062 typename ObjType::Compute_final_local_value_status status
2063 = this->object_->compute_final_local_value(this->r_sym_, psymval,
2065 if (status != ObjType::CFLV_OK
2066 || !symval.has_output_value())
2068 to = symval.value(this->object_, 0);
2070 if (stub_table == NULL)
2071 stub_table = this->object_->stub_table(this->shndx_);
2072 gold_assert(stub_table != NULL);
2073 if (size == 64 && is_branch_reloc(this->r_type_))
2075 unsigned int dest_shndx;
2076 to = stub_table->targ()->symval_for_branch(to, gsym, this->object_,
2079 Address delta = to - from;
2080 if (delta + max_branch_offset >= 2 * max_branch_offset)
2082 stub_table->add_long_branch_entry(this->object_, to);
2087 // Relaxation hook. This is where we do stub generation.
2089 template<int size, bool big_endian>
2091 Target_powerpc<size, big_endian>::do_relax(int pass,
2092 const Input_objects*,
2093 Symbol_table* symtab,
2097 unsigned int prev_brlt_size = 0;
2100 bool thread_safe = parameters->options().plt_thread_safe();
2101 if (size == 64 && !parameters->options().user_set_plt_thread_safe())
2103 const char* const thread_starter[] =
2107 "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
2109 "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
2110 "mq_notify", "create_timer",
2114 "GOMP_parallel_start",
2115 "GOMP_parallel_loop_static_start",
2116 "GOMP_parallel_loop_dynamic_start",
2117 "GOMP_parallel_loop_guided_start",
2118 "GOMP_parallel_loop_runtime_start",
2119 "GOMP_parallel_sections_start",
2122 for (unsigned int i = 0;
2123 i < sizeof(thread_starter) / sizeof(thread_starter[0]);
2126 Symbol* sym = symtab->lookup(thread_starter[i], NULL);
2127 thread_safe = sym != NULL && sym->in_reg() && sym->in_real_elf();
2132 this->plt_thread_safe_ = thread_safe;
2133 this->group_sections(layout, task);
2136 // We need address of stub tables valid for make_stub.
2137 for (typename Stub_tables::iterator p = this->stub_tables_.begin();
2138 p != this->stub_tables_.end();
2141 const Powerpc_relobj<size, big_endian>* object
2142 = static_cast<const Powerpc_relobj<size, big_endian>*>((*p)->relobj());
2143 Address off = object->get_output_section_offset((*p)->shndx());
2144 gold_assert(off != invalid_address);
2145 Output_section* os = (*p)->output_section();
2146 (*p)->set_address_and_size(os, off);
2151 // Clear plt call stubs, long branch stubs and branch lookup table.
2152 prev_brlt_size = this->branch_lookup_table_.size();
2153 this->branch_lookup_table_.clear();
2154 for (typename Stub_tables::iterator p = this->stub_tables_.begin();
2155 p != this->stub_tables_.end();
2158 (*p)->clear_stubs();
2162 // Build all the stubs.
2163 Stub_table<size, big_endian>* ifunc_stub_table
2164 = this->stub_tables_.size() == 0 ? NULL : this->stub_tables_[0];
2165 Stub_table<size, big_endian>* one_stub_table
2166 = this->stub_tables_.size() != 1 ? NULL : ifunc_stub_table;
2167 for (typename Branches::const_iterator b = this->branch_info_.begin();
2168 b != this->branch_info_.end();
2171 b->make_stub(one_stub_table, ifunc_stub_table, symtab);
2174 // Did anything change size?
2175 unsigned int num_huge_branches = this->branch_lookup_table_.size();
2176 bool again = num_huge_branches != prev_brlt_size;
2177 if (size == 64 && num_huge_branches != 0)
2178 this->make_brlt_section(layout);
2179 if (size == 64 && again)
2180 this->brlt_section_->set_current_size(num_huge_branches);
2182 typedef Unordered_set<Output_section*> Output_sections;
2183 Output_sections os_need_update;
2184 for (typename Stub_tables::iterator p = this->stub_tables_.begin();
2185 p != this->stub_tables_.end();
2188 if ((*p)->size_update())
2191 os_need_update.insert((*p)->output_section());
2195 // Set output section offsets for all input sections in an output
2196 // section that just changed size. Anything past the stubs will
2198 for (typename Output_sections::iterator p = os_need_update.begin();
2199 p != os_need_update.end();
2202 Output_section* os = *p;
2204 typedef Output_section::Input_section_list Input_section_list;
2205 for (Input_section_list::const_iterator i = os->input_sections().begin();
2206 i != os->input_sections().end();
2209 off = align_address(off, i->addralign());
2210 if (i->is_input_section() || i->is_relaxed_input_section())
2211 i->relobj()->set_section_offset(i->shndx(), off);
2212 if (i->is_relaxed_input_section())
2214 Stub_table<size, big_endian>* stub_table
2215 = static_cast<Stub_table<size, big_endian>*>(
2216 i->relaxed_input_section());
2217 off += stub_table->set_address_and_size(os, off);
2220 off += i->data_size();
2222 // If .brlt is part of this output section, then we have just
2223 // done the offset adjustment.
2224 os->clear_section_offsets_need_adjustment();
2229 && num_huge_branches != 0
2230 && parameters->options().output_is_position_independent())
2232 // Fill in the BRLT relocs.
2233 this->brlt_section_->reset_data_size();
2234 for (typename Branch_lookup_table::const_iterator p
2235 = this->branch_lookup_table_.begin();
2236 p != this->branch_lookup_table_.end();
2239 this->brlt_section_->add_reloc(p->first, p->second);
2241 this->brlt_section_->finalize_data_size();
2246 // A class to handle the PLT data.
2248 template<int size, bool big_endian>
2249 class Output_data_plt_powerpc : public Output_section_data_build
2252 typedef Output_data_reloc<elfcpp::SHT_RELA, true,
2253 size, big_endian> Reloc_section;
2255 Output_data_plt_powerpc(Target_powerpc<size, big_endian>* targ,
2256 Reloc_section* plt_rel,
2257 unsigned int reserved_size,
2259 : Output_section_data_build(size == 32 ? 4 : 8),
2262 initial_plt_entry_size_(reserved_size),
2266 // Add an entry to the PLT.
2271 add_ifunc_entry(Symbol*);
2274 add_local_ifunc_entry(Sized_relobj_file<size, big_endian>*, unsigned int);
2276 // Return the .rela.plt section data.
2283 // Return the number of PLT entries.
2287 return ((this->current_data_size() - this->initial_plt_entry_size_)
2291 // Return the offset of the first non-reserved PLT entry.
2293 first_plt_entry_offset()
2294 { return this->initial_plt_entry_size_; }
2296 // Return the size of a PLT entry.
2298 get_plt_entry_size()
2299 { return plt_entry_size; }
2303 do_adjust_output_section(Output_section* os)
2308 // Write to a map file.
2310 do_print_to_mapfile(Mapfile* mapfile) const
2311 { mapfile->print_output_data(this, this->name_); }
2314 // The size of an entry in the PLT.
2315 static const int plt_entry_size = size == 32 ? 4 : 24;
2317 // Write out the PLT data.
2319 do_write(Output_file*);
2321 // The reloc section.
2322 Reloc_section* rel_;
2323 // Allows access to .glink for do_write.
2324 Target_powerpc<size, big_endian>* targ_;
2325 // The size of the first reserved entry.
2326 int initial_plt_entry_size_;
2327 // What to report in map file.
2331 // Add an entry to the PLT.
2333 template<int size, bool big_endian>
2335 Output_data_plt_powerpc<size, big_endian>::add_entry(Symbol* gsym)
2337 if (!gsym->has_plt_offset())
2339 section_size_type off = this->current_data_size();
2341 off += this->first_plt_entry_offset();
2342 gsym->set_plt_offset(off);
2343 gsym->set_needs_dynsym_entry();
2344 unsigned int dynrel = elfcpp::R_POWERPC_JMP_SLOT;
2345 this->rel_->add_global(gsym, dynrel, this, off, 0);
2346 off += plt_entry_size;
2347 this->set_current_data_size(off);
2351 // Add an entry for a global ifunc symbol that resolves locally, to the IPLT.
2353 template<int size, bool big_endian>
2355 Output_data_plt_powerpc<size, big_endian>::add_ifunc_entry(Symbol* gsym)
2357 if (!gsym->has_plt_offset())
2359 section_size_type off = this->current_data_size();
2360 gsym->set_plt_offset(off);
2361 unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE;
2363 dynrel = elfcpp::R_PPC64_JMP_IREL;
2364 this->rel_->add_symbolless_global_addend(gsym, dynrel, this, off, 0);
2365 off += plt_entry_size;
2366 this->set_current_data_size(off);
2370 // Add an entry for a local ifunc symbol to the IPLT.
2372 template<int size, bool big_endian>
2374 Output_data_plt_powerpc<size, big_endian>::add_local_ifunc_entry(
2375 Sized_relobj_file<size, big_endian>* relobj,
2376 unsigned int local_sym_index)
2378 if (!relobj->local_has_plt_offset(local_sym_index))
2380 section_size_type off = this->current_data_size();
2381 relobj->set_local_plt_offset(local_sym_index, off);
2382 unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE;
2384 dynrel = elfcpp::R_PPC64_JMP_IREL;
2385 this->rel_->add_symbolless_local_addend(relobj, local_sym_index, dynrel,
2387 off += plt_entry_size;
2388 this->set_current_data_size(off);
2392 static const uint32_t add_0_11_11 = 0x7c0b5a14;
2393 static const uint32_t add_2_2_11 = 0x7c425a14;
2394 static const uint32_t add_3_3_2 = 0x7c631214;
2395 static const uint32_t add_3_3_13 = 0x7c636a14;
2396 static const uint32_t add_11_0_11 = 0x7d605a14;
2397 static const uint32_t add_12_2_11 = 0x7d825a14;
2398 static const uint32_t add_12_12_11 = 0x7d8c5a14;
2399 static const uint32_t addi_11_11 = 0x396b0000;
2400 static const uint32_t addi_12_12 = 0x398c0000;
2401 static const uint32_t addi_2_2 = 0x38420000;
2402 static const uint32_t addi_3_2 = 0x38620000;
2403 static const uint32_t addi_3_3 = 0x38630000;
2404 static const uint32_t addis_0_2 = 0x3c020000;
2405 static const uint32_t addis_0_13 = 0x3c0d0000;
2406 static const uint32_t addis_11_11 = 0x3d6b0000;
2407 static const uint32_t addis_11_30 = 0x3d7e0000;
2408 static const uint32_t addis_12_12 = 0x3d8c0000;
2409 static const uint32_t addis_12_2 = 0x3d820000;
2410 static const uint32_t addis_3_2 = 0x3c620000;
2411 static const uint32_t addis_3_13 = 0x3c6d0000;
2412 static const uint32_t b = 0x48000000;
2413 static const uint32_t bcl_20_31 = 0x429f0005;
2414 static const uint32_t bctr = 0x4e800420;
2415 static const uint32_t blr = 0x4e800020;
2416 static const uint32_t blrl = 0x4e800021;
2417 static const uint32_t bnectr_p4 = 0x4ce20420;
2418 static const uint32_t cmpldi_2_0 = 0x28220000;
2419 static const uint32_t cror_15_15_15 = 0x4def7b82;
2420 static const uint32_t cror_31_31_31 = 0x4ffffb82;
2421 static const uint32_t ld_0_1 = 0xe8010000;
2422 static const uint32_t ld_0_12 = 0xe80c0000;
2423 static const uint32_t ld_11_12 = 0xe96c0000;
2424 static const uint32_t ld_11_2 = 0xe9620000;
2425 static const uint32_t ld_2_1 = 0xe8410000;
2426 static const uint32_t ld_2_11 = 0xe84b0000;
2427 static const uint32_t ld_2_12 = 0xe84c0000;
2428 static const uint32_t ld_2_2 = 0xe8420000;
2429 static const uint32_t lfd_0_1 = 0xc8010000;
2430 static const uint32_t li_0_0 = 0x38000000;
2431 static const uint32_t li_12_0 = 0x39800000;
2432 static const uint32_t lis_0_0 = 0x3c000000;
2433 static const uint32_t lis_11 = 0x3d600000;
2434 static const uint32_t lis_12 = 0x3d800000;
2435 static const uint32_t lwz_0_12 = 0x800c0000;
2436 static const uint32_t lwz_11_11 = 0x816b0000;
2437 static const uint32_t lwz_11_30 = 0x817e0000;
2438 static const uint32_t lwz_12_12 = 0x818c0000;
2439 static const uint32_t lwzu_0_12 = 0x840c0000;
2440 static const uint32_t lvx_0_12_0 = 0x7c0c00ce;
2441 static const uint32_t mflr_0 = 0x7c0802a6;
2442 static const uint32_t mflr_11 = 0x7d6802a6;
2443 static const uint32_t mflr_12 = 0x7d8802a6;
2444 static const uint32_t mtctr_0 = 0x7c0903a6;
2445 static const uint32_t mtctr_11 = 0x7d6903a6;
2446 static const uint32_t mtctr_12 = 0x7d8903a6;
2447 static const uint32_t mtlr_0 = 0x7c0803a6;
2448 static const uint32_t mtlr_12 = 0x7d8803a6;
2449 static const uint32_t nop = 0x60000000;
2450 static const uint32_t ori_0_0_0 = 0x60000000;
2451 static const uint32_t std_0_1 = 0xf8010000;
2452 static const uint32_t std_0_12 = 0xf80c0000;
2453 static const uint32_t std_2_1 = 0xf8410000;
2454 static const uint32_t stfd_0_1 = 0xd8010000;
2455 static const uint32_t stvx_0_12_0 = 0x7c0c01ce;
2456 static const uint32_t sub_11_11_12 = 0x7d6c5850;
2457 static const uint32_t xor_11_11_11 = 0x7d6b5a78;
2459 // Write out the PLT.
2461 template<int size, bool big_endian>
2463 Output_data_plt_powerpc<size, big_endian>::do_write(Output_file* of)
2467 const section_size_type offset = this->offset();
2468 const section_size_type oview_size
2469 = convert_to_section_size_type(this->data_size());
2470 unsigned char* const oview = of->get_output_view(offset, oview_size);
2471 unsigned char* pov = oview;
2472 unsigned char* endpov = oview + oview_size;
2474 // The address of the .glink branch table
2475 const Output_data_glink<size, big_endian>* glink
2476 = this->targ_->glink_section();
2477 elfcpp::Elf_types<32>::Elf_Addr branch_tab = glink->address();
2479 while (pov < endpov)
2481 elfcpp::Swap<32, big_endian>::writeval(pov, branch_tab);
2486 of->write_output_view(offset, oview_size, oview);
2490 // Create the PLT section.
2492 template<int size, bool big_endian>
2494 Target_powerpc<size, big_endian>::make_plt_section(Symbol_table* symtab,
2497 if (this->plt_ == NULL)
2499 if (this->got_ == NULL)
2500 this->got_section(symtab, layout);
2502 if (this->glink_ == NULL)
2503 make_glink_section(layout);
2505 // Ensure that .rela.dyn always appears before .rela.plt This is
2506 // necessary due to how, on PowerPC and some other targets, .rela.dyn
2507 // needs to include .rela.plt in it's range.
2508 this->rela_dyn_section(layout);
2510 Reloc_section* plt_rel = new Reloc_section(false);
2511 layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA,
2512 elfcpp::SHF_ALLOC, plt_rel,
2513 ORDER_DYNAMIC_PLT_RELOCS, false);
2515 = new Output_data_plt_powerpc<size, big_endian>(this, plt_rel,
2516 size == 32 ? 0 : 24,
2518 layout->add_output_section_data(".plt",
2520 ? elfcpp::SHT_PROGBITS
2521 : elfcpp::SHT_NOBITS),
2522 elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE,
2531 // Create the IPLT section.
2533 template<int size, bool big_endian>
2535 Target_powerpc<size, big_endian>::make_iplt_section(Symbol_table* symtab,
2538 if (this->iplt_ == NULL)
2540 this->make_plt_section(symtab, layout);
2542 Reloc_section* iplt_rel = new Reloc_section(false);
2543 this->rela_dyn_->output_section()->add_output_section_data(iplt_rel);
2545 = new Output_data_plt_powerpc<size, big_endian>(this, iplt_rel,
2547 this->plt_->output_section()->add_output_section_data(this->iplt_);
2551 // A section for huge long branch addresses, similar to plt section.
2553 template<int size, bool big_endian>
2554 class Output_data_brlt_powerpc : public Output_section_data_build
2557 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
2558 typedef Output_data_reloc<elfcpp::SHT_RELA, true,
2559 size, big_endian> Reloc_section;
2561 Output_data_brlt_powerpc(Target_powerpc<size, big_endian>* targ,
2562 Reloc_section* brlt_rel)
2563 : Output_section_data_build(size == 32 ? 4 : 8),
2568 // Add a reloc for an entry in the BRLT.
2570 add_reloc(Address to, unsigned int off)
2571 { this->rel_->add_relative(elfcpp::R_POWERPC_RELATIVE, this, off, to); }
2573 // Update section and reloc section size.
2575 set_current_size(unsigned int num_branches)
2577 this->reset_address_and_file_offset();
2578 this->set_current_data_size(num_branches * 16);
2579 this->finalize_data_size();
2580 Output_section* os = this->output_section();
2581 os->set_section_offsets_need_adjustment();
2582 if (this->rel_ != NULL)
2584 unsigned int reloc_size
2585 = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size;
2586 this->rel_->reset_address_and_file_offset();
2587 this->rel_->set_current_data_size(num_branches * reloc_size);
2588 this->rel_->finalize_data_size();
2589 Output_section* os = this->rel_->output_section();
2590 os->set_section_offsets_need_adjustment();
2596 do_adjust_output_section(Output_section* os)
2601 // Write to a map file.
2603 do_print_to_mapfile(Mapfile* mapfile) const
2604 { mapfile->print_output_data(this, "** BRLT"); }
2607 // Write out the BRLT data.
2609 do_write(Output_file*);
2611 // The reloc section.
2612 Reloc_section* rel_;
2613 Target_powerpc<size, big_endian>* targ_;
2616 // Make the branch lookup table section.
2618 template<int size, bool big_endian>
2620 Target_powerpc<size, big_endian>::make_brlt_section(Layout* layout)
2622 if (size == 64 && this->brlt_section_ == NULL)
2624 Reloc_section* brlt_rel = NULL;
2625 bool is_pic = parameters->options().output_is_position_independent();
2628 // When PIC we can't fill in .brlt (like .plt it can be a
2629 // bss style section) but must initialise at runtime via
2630 // dynamic relocats.
2631 this->rela_dyn_section(layout);
2632 brlt_rel = new Reloc_section(false);
2633 this->rela_dyn_->output_section()->add_output_section_data(brlt_rel);
2636 = new Output_data_brlt_powerpc<size, big_endian>(this, brlt_rel);
2637 if (this->plt_ && is_pic)
2638 this->plt_->output_section()
2639 ->add_output_section_data(this->brlt_section_);
2641 layout->add_output_section_data(".brlt",
2642 (is_pic ? elfcpp::SHT_NOBITS
2643 : elfcpp::SHT_PROGBITS),
2644 elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE,
2645 this->brlt_section_,
2646 (is_pic ? ORDER_SMALL_BSS
2647 : ORDER_SMALL_DATA),
2652 // Write out .brlt when non-PIC.
2654 template<int size, bool big_endian>
2656 Output_data_brlt_powerpc<size, big_endian>::do_write(Output_file* of)
2658 if (size == 64 && !parameters->options().output_is_position_independent())
2660 const section_size_type offset = this->offset();
2661 const section_size_type oview_size
2662 = convert_to_section_size_type(this->data_size());
2663 unsigned char* const oview = of->get_output_view(offset, oview_size);
2665 this->targ_->write_branch_lookup_table(oview);
2666 of->write_output_view(offset, oview_size, oview);
2670 static inline uint32_t
2676 static inline uint32_t
2682 static inline uint32_t
2685 return hi(a + 0x8000);
2688 template<bool big_endian>
2690 write_insn(unsigned char* p, uint32_t v)
2692 elfcpp::Swap<32, big_endian>::writeval(p, v);
2695 // Stub_table holds information about plt and long branch stubs.
2696 // Stubs are built in an area following some input section determined
2697 // by group_sections(). This input section is converted to a relaxed
2698 // input section allowing it to be resized to accommodate the stubs
2700 template<int size, bool big_endian>
2701 class Stub_table : public Output_relaxed_input_section
2704 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
2705 static const Address invalid_address = static_cast<Address>(0) - 1;
2707 Stub_table(Target_powerpc<size, big_endian>* targ)
2708 : Output_relaxed_input_section(NULL, 0, 0),
2709 targ_(targ), plt_call_stubs_(), long_branch_stubs_(),
2710 orig_data_size_(0), plt_size_(0), last_plt_size_(0),
2711 branch_size_(0), last_branch_size_(0)
2714 // Delayed Output_relaxed_input_section init.
2716 init(const Output_section::Input_section*, Output_section*);
2718 // Add a plt call stub.
2720 add_plt_call_entry(const Sized_relobj_file<size, big_endian>*,
2726 add_plt_call_entry(const Sized_relobj_file<size, big_endian>*,
2731 // Find a given plt call stub.
2733 find_plt_call_entry(const Symbol*) const;
2736 find_plt_call_entry(const Sized_relobj_file<size, big_endian>*,
2737 unsigned int) const;
2740 find_plt_call_entry(const Sized_relobj_file<size, big_endian>*,
2746 find_plt_call_entry(const Sized_relobj_file<size, big_endian>*,
2751 // Add a long branch stub.
2753 add_long_branch_entry(const Powerpc_relobj<size, big_endian>*, Address);
2756 find_long_branch_entry(const Powerpc_relobj<size, big_endian>*, Address);
2761 this->plt_call_stubs_.clear();
2762 this->plt_size_ = 0;
2763 this->long_branch_stubs_.clear();
2764 this->branch_size_ = 0;
2768 set_address_and_size(const Output_section* os, Address off)
2770 Address start_off = off;
2771 off += this->orig_data_size_;
2772 Address my_size = this->plt_size_ + this->branch_size_;
2774 off = align_address(off, this->stub_align());
2775 // Include original section size and alignment padding in size
2776 my_size += off - start_off;
2777 this->reset_address_and_file_offset();
2778 this->set_current_data_size(my_size);
2779 this->set_address_and_file_offset(os->address() + start_off,
2780 os->offset() + start_off);
2787 return align_address(this->address() + this->orig_data_size_,
2788 this->stub_align());
2794 return align_address(this->offset() + this->orig_data_size_,
2795 this->stub_align());
2800 { return this->plt_size_; }
2805 Output_section* os = this->output_section();
2806 if (os->addralign() < this->stub_align())
2808 os->set_addralign(this->stub_align());
2809 // FIXME: get rid of the insane checkpointing.
2810 // We can't increase alignment of the input section to which
2811 // stubs are attached; The input section may be .init which
2812 // is pasted together with other .init sections to form a
2813 // function. Aligning might insert zero padding resulting in
2814 // sigill. However we do need to increase alignment of the
2815 // output section so that the align_address() on offset in
2816 // set_address_and_size() adds the same padding as the
2817 // align_address() on address in stub_address().
2818 // What's more, we need this alignment for the layout done in
2819 // relaxation_loop_body() so that the output section starts at
2820 // a suitably aligned address.
2821 os->checkpoint_set_addralign(this->stub_align());
2823 if (this->last_plt_size_ != this->plt_size_
2824 || this->last_branch_size_ != this->branch_size_)
2826 this->last_plt_size_ = this->plt_size_;
2827 this->last_branch_size_ = this->branch_size_;
2833 Target_powerpc<size, big_endian>*
2839 class Plt_stub_ent_hash;
2840 typedef Unordered_map<Plt_stub_ent, unsigned int,
2841 Plt_stub_ent_hash> Plt_stub_entries;
2843 // Alignment of stub section.
2849 unsigned int min_align = 32;
2850 unsigned int user_align = 1 << parameters->options().plt_align();
2851 return std::max(user_align, min_align);
2854 // Size of a given plt call stub.
2856 plt_call_size(typename Plt_stub_entries::const_iterator p) const
2861 Address pltaddr = p->second;
2862 if (p->first.sym_ == NULL
2863 || (p->first.sym_->type() == elfcpp::STT_GNU_IFUNC
2864 && p->first.sym_->can_use_relative_reloc(false)))
2865 pltaddr += this->targ_->iplt_section()->address();
2867 pltaddr += this->targ_->plt_section()->address();
2868 Address tocbase = this->targ_->got_section()->output_section()->address();
2869 const Powerpc_relobj<size, big_endian>* ppcobj = static_cast
2870 <const Powerpc_relobj<size, big_endian>*>(p->first.object_);
2871 tocbase += ppcobj->toc_base_offset();
2872 Address off = pltaddr - tocbase;
2873 bool static_chain = parameters->options().plt_static_chain();
2874 bool thread_safe = this->targ_->plt_thread_safe();
2875 unsigned int bytes = (4 * 5
2878 + 4 * (ha(off) != 0)
2879 + 4 * (ha(off + 8 + 8 * static_chain) != ha(off)));
2880 unsigned int align = 1 << parameters->options().plt_align();
2882 bytes = (bytes + align - 1) & -align;
2886 // Return long branch stub size.
2888 branch_stub_size(Address to)
2891 = this->stub_address() + this->last_plt_size_ + this->branch_size_;
2892 if (to - loc + (1 << 25) < 2 << 25)
2894 if (size == 64 || !parameters->options().output_is_position_independent())
2901 do_write(Output_file*);
2903 // Plt call stub keys.
2907 Plt_stub_ent(const Symbol* sym)
2908 : sym_(sym), object_(0), addend_(0), locsym_(0)
2911 Plt_stub_ent(const Sized_relobj_file<size, big_endian>* object,
2912 unsigned int locsym_index)
2913 : sym_(NULL), object_(object), addend_(0), locsym_(locsym_index)
2916 Plt_stub_ent(const Sized_relobj_file<size, big_endian>* object,
2918 unsigned int r_type,
2920 : sym_(sym), object_(0), addend_(0), locsym_(0)
2923 this->addend_ = addend;
2924 else if (parameters->options().output_is_position_independent()
2925 && r_type == elfcpp::R_PPC_PLTREL24)
2927 this->addend_ = addend;
2928 if (this->addend_ >= 32768)
2929 this->object_ = object;
2933 Plt_stub_ent(const Sized_relobj_file<size, big_endian>* object,
2934 unsigned int locsym_index,
2935 unsigned int r_type,
2937 : sym_(NULL), object_(object), addend_(0), locsym_(locsym_index)
2940 this->addend_ = addend;
2941 else if (parameters->options().output_is_position_independent()
2942 && r_type == elfcpp::R_PPC_PLTREL24)
2943 this->addend_ = addend;
2946 bool operator==(const Plt_stub_ent& that) const
2948 return (this->sym_ == that.sym_
2949 && this->object_ == that.object_
2950 && this->addend_ == that.addend_
2951 && this->locsym_ == that.locsym_);
2955 const Sized_relobj_file<size, big_endian>* object_;
2956 typename elfcpp::Elf_types<size>::Elf_Addr addend_;
2957 unsigned int locsym_;
2960 class Plt_stub_ent_hash
2963 size_t operator()(const Plt_stub_ent& ent) const
2965 return (reinterpret_cast<uintptr_t>(ent.sym_)
2966 ^ reinterpret_cast<uintptr_t>(ent.object_)
2972 // Long branch stub keys.
2973 class Branch_stub_ent
2976 Branch_stub_ent(const Powerpc_relobj<size, big_endian>* obj, Address to)
2977 : dest_(to), toc_base_off_(0)
2980 toc_base_off_ = obj->toc_base_offset();
2983 bool operator==(const Branch_stub_ent& that) const
2985 return (this->dest_ == that.dest_
2987 || this->toc_base_off_ == that.toc_base_off_));
2991 unsigned int toc_base_off_;
2994 class Branch_stub_ent_hash
2997 size_t operator()(const Branch_stub_ent& ent) const
2998 { return ent.dest_ ^ ent.toc_base_off_; }
3001 // In a sane world this would be a global.
3002 Target_powerpc<size, big_endian>* targ_;
3003 // Map sym/object/addend to stub offset.
3004 Plt_stub_entries plt_call_stubs_;
3005 // Map destination address to stub offset.
3006 typedef Unordered_map<Branch_stub_ent, unsigned int,
3007 Branch_stub_ent_hash> Branch_stub_entries;
3008 Branch_stub_entries long_branch_stubs_;
3009 // size of input section
3010 section_size_type orig_data_size_;
3012 section_size_type plt_size_, last_plt_size_, branch_size_, last_branch_size_;
3015 // Make a new stub table, and record.
3017 template<int size, bool big_endian>
3018 Stub_table<size, big_endian>*
3019 Target_powerpc<size, big_endian>::new_stub_table()
3021 Stub_table<size, big_endian>* stub_table
3022 = new Stub_table<size, big_endian>(this);
3023 this->stub_tables_.push_back(stub_table);
3027 // Delayed stub table initialisation, because we create the stub table
3028 // before we know to which section it will be attached.
3030 template<int size, bool big_endian>
3032 Stub_table<size, big_endian>::init(
3033 const Output_section::Input_section* owner,
3034 Output_section* output_section)
3036 this->set_relobj(owner->relobj());
3037 this->set_shndx(owner->shndx());
3038 this->set_addralign(this->relobj()->section_addralign(this->shndx()));
3039 this->set_output_section(output_section);
3040 this->orig_data_size_ = owner->current_data_size();
3042 std::vector<Output_relaxed_input_section*> new_relaxed;
3043 new_relaxed.push_back(this);
3044 output_section->convert_input_sections_to_relaxed_sections(new_relaxed);
3047 // Add a plt call stub, if we do not already have one for this
3048 // sym/object/addend combo.
3050 template<int size, bool big_endian>
3052 Stub_table<size, big_endian>::add_plt_call_entry(
3053 const Sized_relobj_file<size, big_endian>* object,
3055 unsigned int r_type,
3058 Plt_stub_ent ent(object, gsym, r_type, addend);
3059 Address off = this->plt_size_;
3060 std::pair<typename Plt_stub_entries::iterator, bool> p
3061 = this->plt_call_stubs_.insert(std::make_pair(ent, off));
3063 this->plt_size_ = off + this->plt_call_size(p.first);
3066 template<int size, bool big_endian>
3068 Stub_table<size, big_endian>::add_plt_call_entry(
3069 const Sized_relobj_file<size, big_endian>* object,
3070 unsigned int locsym_index,
3071 unsigned int r_type,
3074 Plt_stub_ent ent(object, locsym_index, r_type, addend);
3075 Address off = this->plt_size_;
3076 std::pair<typename Plt_stub_entries::iterator, bool> p
3077 = this->plt_call_stubs_.insert(std::make_pair(ent, off));
3079 this->plt_size_ = off + this->plt_call_size(p.first);
3082 // Find a plt call stub.
3084 template<int size, bool big_endian>
3085 typename elfcpp::Elf_types<size>::Elf_Addr
3086 Stub_table<size, big_endian>::find_plt_call_entry(
3087 const Sized_relobj_file<size, big_endian>* object,
3089 unsigned int r_type,
3090 Address addend) const
3092 Plt_stub_ent ent(object, gsym, r_type, addend);
3093 typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent);
3094 return p == this->plt_call_stubs_.end() ? invalid_address : p->second;
3097 template<int size, bool big_endian>
3098 typename elfcpp::Elf_types<size>::Elf_Addr
3099 Stub_table<size, big_endian>::find_plt_call_entry(const Symbol* gsym) const
3101 Plt_stub_ent ent(gsym);
3102 typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent);
3103 return p == this->plt_call_stubs_.end() ? invalid_address : p->second;
3106 template<int size, bool big_endian>
3107 typename elfcpp::Elf_types<size>::Elf_Addr
3108 Stub_table<size, big_endian>::find_plt_call_entry(
3109 const Sized_relobj_file<size, big_endian>* object,
3110 unsigned int locsym_index,
3111 unsigned int r_type,
3112 Address addend) const
3114 Plt_stub_ent ent(object, locsym_index, r_type, addend);
3115 typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent);
3116 return p == this->plt_call_stubs_.end() ? invalid_address : p->second;
3119 template<int size, bool big_endian>
3120 typename elfcpp::Elf_types<size>::Elf_Addr
3121 Stub_table<size, big_endian>::find_plt_call_entry(
3122 const Sized_relobj_file<size, big_endian>* object,
3123 unsigned int locsym_index) const
3125 Plt_stub_ent ent(object, locsym_index);
3126 typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(ent);
3127 return p == this->plt_call_stubs_.end() ? invalid_address : p->second;
3130 // Add a long branch stub if we don't already have one to given
3133 template<int size, bool big_endian>
3135 Stub_table<size, big_endian>::add_long_branch_entry(
3136 const Powerpc_relobj<size, big_endian>* object,
3139 Branch_stub_ent ent(object, to);
3140 Address off = this->branch_size_;
3141 if (this->long_branch_stubs_.insert(std::make_pair(ent, off)).second)
3143 unsigned int stub_size = this->branch_stub_size(to);
3144 this->branch_size_ = off + stub_size;
3145 if (size == 64 && stub_size != 4)
3146 this->targ_->add_branch_lookup_table(to);
3150 // Find long branch stub.
3152 template<int size, bool big_endian>
3153 typename elfcpp::Elf_types<size>::Elf_Addr
3154 Stub_table<size, big_endian>::find_long_branch_entry(
3155 const Powerpc_relobj<size, big_endian>* object,
3158 Branch_stub_ent ent(object, to);
3159 typename Branch_stub_entries::const_iterator p
3160 = this->long_branch_stubs_.find(ent);
3161 return p == this->long_branch_stubs_.end() ? invalid_address : p->second;
3164 // A class to handle .glink.
3166 template<int size, bool big_endian>
3167 class Output_data_glink : public Output_section_data
3170 static const int pltresolve_size = 16*4;
3172 Output_data_glink(Target_powerpc<size, big_endian>* targ)
3173 : Output_section_data(16), targ_(targ)
3177 // Write to a map file.
3179 do_print_to_mapfile(Mapfile* mapfile) const
3180 { mapfile->print_output_data(this, _("** glink")); }
3184 set_final_data_size();
3188 do_write(Output_file*);
3190 // Allows access to .got and .plt for do_write.
3191 Target_powerpc<size, big_endian>* targ_;
3194 template<int size, bool big_endian>
3196 Output_data_glink<size, big_endian>::set_final_data_size()
3198 unsigned int count = this->targ_->plt_entry_count();
3199 section_size_type total = 0;
3205 // space for branch table
3206 total += 4 * (count - 1);
3208 total += -total & 15;
3209 total += this->pltresolve_size;
3213 total += this->pltresolve_size;
3215 // space for branch table
3218 total += 4 * (count - 0x8000);
3222 this->set_data_size(total);
3225 // Write out plt and long branch stub code.
3227 template<int size, bool big_endian>
3229 Stub_table<size, big_endian>::do_write(Output_file* of)
3231 if (this->plt_call_stubs_.empty()
3232 && this->long_branch_stubs_.empty())
3235 const section_size_type start_off = this->offset();
3236 const section_size_type off = this->stub_offset();
3237 const section_size_type oview_size =
3238 convert_to_section_size_type(this->data_size() - (off - start_off));
3239 unsigned char* const oview = of->get_output_view(off, oview_size);
3244 const Output_data_got_powerpc<size, big_endian>* got
3245 = this->targ_->got_section();
3246 Address got_os_addr = got->output_section()->address();
3248 if (!this->plt_call_stubs_.empty())
3250 // The base address of the .plt section.
3251 Address plt_base = this->targ_->plt_section()->address();
3252 Address iplt_base = invalid_address;
3254 // Write out plt call stubs.
3255 typename Plt_stub_entries::const_iterator cs;
3256 for (cs = this->plt_call_stubs_.begin();
3257 cs != this->plt_call_stubs_.end();
3262 const Symbol* gsym = cs->first.sym_;
3265 is_ifunc = (gsym->type() == elfcpp::STT_GNU_IFUNC
3266 && gsym->can_use_relative_reloc(false));
3267 pltoff = gsym->plt_offset();
3272 const Sized_relobj_file<size, big_endian>* relobj
3273 = cs->first.object_;
3274 unsigned int local_sym_index = cs->first.locsym_;
3275 pltoff = relobj->local_plt_offset(local_sym_index);
3277 Address plt_addr = pltoff;
3280 if (iplt_base == invalid_address)
3281 iplt_base = this->targ_->iplt_section()->address();
3282 plt_addr += iplt_base;
3285 plt_addr += plt_base;
3286 const Powerpc_relobj<size, big_endian>* ppcobj = static_cast
3287 <const Powerpc_relobj<size, big_endian>*>(cs->first.object_);
3288 Address got_addr = got_os_addr + ppcobj->toc_base_offset();
3289 Address off = plt_addr - got_addr;
3291 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
3292 gold_error(_("%s: linkage table error against `%s'"),
3293 cs->first.object_->name().c_str(),
3294 cs->first.sym_->demangled_name().c_str());
3296 bool static_chain = parameters->options().plt_static_chain();
3297 bool thread_safe = this->targ_->plt_thread_safe();
3298 bool use_fake_dep = false;
3299 Address cmp_branch_off = 0;
3302 unsigned int pltindex
3303 = ((pltoff - this->targ_->first_plt_entry_offset())
3304 / this->targ_->plt_entry_size());
3306 = (this->targ_->glink_section()->pltresolve_size
3308 if (pltindex > 32768)
3309 glinkoff += (pltindex - 32768) * 4;
3311 = this->targ_->glink_section()->address() + glinkoff;
3313 = (this->stub_address() + cs->second + 24
3314 + 4 * (ha(off) != 0)
3315 + 4 * (ha(off + 8 + 8 * static_chain) != ha(off))
3316 + 4 * static_chain);
3317 cmp_branch_off = to - from;
3318 use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
3321 p = oview + cs->second;
3324 write_insn<big_endian>(p, std_2_1 + 40), p += 4;
3325 write_insn<big_endian>(p, addis_12_2 + ha(off)), p += 4;
3326 write_insn<big_endian>(p, ld_11_12 + l(off)), p += 4;
3327 if (ha(off + 8 + 8 * static_chain) != ha(off))
3329 write_insn<big_endian>(p, addi_12_12 + l(off)), p += 4;
3332 write_insn<big_endian>(p, mtctr_11), p += 4;
3335 write_insn<big_endian>(p, xor_11_11_11), p += 4;
3336 write_insn<big_endian>(p, add_12_12_11), p += 4;
3338 write_insn<big_endian>(p, ld_2_12 + l(off + 8)), p += 4;
3340 write_insn<big_endian>(p, ld_11_12 + l(off + 16)), p += 4;
3344 write_insn<big_endian>(p, std_2_1 + 40), p += 4;
3345 write_insn<big_endian>(p, ld_11_2 + l(off)), p += 4;
3346 if (ha(off + 8 + 8 * static_chain) != ha(off))
3348 write_insn<big_endian>(p, addi_2_2 + l(off)), p += 4;
3351 write_insn<big_endian>(p, mtctr_11), p += 4;
3354 write_insn<big_endian>(p, xor_11_11_11), p += 4;
3355 write_insn<big_endian>(p, add_2_2_11), p += 4;
3358 write_insn<big_endian>(p, ld_11_2 + l(off + 16)), p += 4;
3359 write_insn<big_endian>(p, ld_2_2 + l(off + 8)), p += 4;
3361 if (thread_safe && !use_fake_dep)
3363 write_insn<big_endian>(p, cmpldi_2_0), p += 4;
3364 write_insn<big_endian>(p, bnectr_p4), p += 4;
3365 write_insn<big_endian>(p, b | (cmp_branch_off & 0x3fffffc));
3368 write_insn<big_endian>(p, bctr);
3372 // Write out long branch stubs.
3373 typename Branch_stub_entries::const_iterator bs;
3374 for (bs = this->long_branch_stubs_.begin();
3375 bs != this->long_branch_stubs_.end();
3378 p = oview + this->plt_size_ + bs->second;
3379 Address loc = this->stub_address() + this->plt_size_ + bs->second;
3380 Address delta = bs->first.dest_ - loc;
3381 if (delta + (1 << 25) < 2 << 25)
3382 write_insn<big_endian>(p, b | (delta & 0x3fffffc));
3386 = this->targ_->find_branch_lookup_table(bs->first.dest_);
3387 gold_assert(brlt_addr != invalid_address);
3388 brlt_addr += this->targ_->brlt_section()->address();
3389 Address got_addr = got_os_addr + bs->first.toc_base_off_;
3390 Address brltoff = brlt_addr - got_addr;
3391 if (ha(brltoff) == 0)
3393 write_insn<big_endian>(p, ld_11_2 + l(brltoff)), p += 4;
3397 write_insn<big_endian>(p, addis_12_2 + ha(brltoff)), p += 4;
3398 write_insn<big_endian>(p, ld_11_12 + l(brltoff)), p += 4;
3400 write_insn<big_endian>(p, mtctr_11), p += 4;
3401 write_insn<big_endian>(p, bctr);
3407 if (!this->plt_call_stubs_.empty())
3409 // The base address of the .plt section.
3410 Address plt_base = this->targ_->plt_section()->address();
3411 Address iplt_base = invalid_address;
3412 // The address of _GLOBAL_OFFSET_TABLE_.
3413 Address g_o_t = invalid_address;
3415 // Write out plt call stubs.
3416 typename Plt_stub_entries::const_iterator cs;
3417 for (cs = this->plt_call_stubs_.begin();
3418 cs != this->plt_call_stubs_.end();
3423 const Symbol* gsym = cs->first.sym_;
3426 is_ifunc = (gsym->type() == elfcpp::STT_GNU_IFUNC
3427 && gsym->can_use_relative_reloc(false));
3428 plt_addr = gsym->plt_offset();
3433 const Sized_relobj_file<size, big_endian>* relobj
3434 = cs->first.object_;
3435 unsigned int local_sym_index = cs->first.locsym_;
3436 plt_addr = relobj->local_plt_offset(local_sym_index);
3440 if (iplt_base == invalid_address)
3441 iplt_base = this->targ_->iplt_section()->address();
3442 plt_addr += iplt_base;
3445 plt_addr += plt_base;
3447 p = oview + cs->second;
3448 if (parameters->options().output_is_position_independent())
3451 const Powerpc_relobj<size, big_endian>* ppcobj
3452 = (static_cast<const Powerpc_relobj<size, big_endian>*>
3453 (cs->first.object_));
3454 if (ppcobj != NULL && cs->first.addend_ >= 32768)
3456 unsigned int got2 = ppcobj->got2_shndx();
3457 got_addr = ppcobj->get_output_section_offset(got2);
3458 gold_assert(got_addr != invalid_address);
3459 got_addr += (ppcobj->output_section(got2)->address()
3460 + cs->first.addend_);
3464 if (g_o_t == invalid_address)
3466 const Output_data_got_powerpc<size, big_endian>* got
3467 = this->targ_->got_section();
3468 g_o_t = got->address() + got->g_o_t();
3473 Address off = plt_addr - got_addr;
3476 write_insn<big_endian>(p + 0, lwz_11_30 + l(off));
3477 write_insn<big_endian>(p + 4, mtctr_11);
3478 write_insn<big_endian>(p + 8, bctr);
3482 write_insn<big_endian>(p + 0, addis_11_30 + ha(off));
3483 write_insn<big_endian>(p + 4, lwz_11_11 + l(off));
3484 write_insn<big_endian>(p + 8, mtctr_11);
3485 write_insn<big_endian>(p + 12, bctr);
3490 write_insn<big_endian>(p + 0, lis_11 + ha(plt_addr));
3491 write_insn<big_endian>(p + 4, lwz_11_11 + l(plt_addr));
3492 write_insn<big_endian>(p + 8, mtctr_11);
3493 write_insn<big_endian>(p + 12, bctr);
3498 // Write out long branch stubs.
3499 typename Branch_stub_entries::const_iterator bs;
3500 for (bs = this->long_branch_stubs_.begin();
3501 bs != this->long_branch_stubs_.end();
3504 p = oview + this->plt_size_ + bs->second;
3505 Address loc = this->stub_address() + this->plt_size_ + bs->second;
3506 Address delta = bs->first.dest_ - loc;
3507 if (delta + (1 << 25) < 2 << 25)
3508 write_insn<big_endian>(p, b | (delta & 0x3fffffc));
3509 else if (!parameters->options().output_is_position_independent())
3511 write_insn<big_endian>(p + 0, lis_12 + ha(bs->first.dest_));
3512 write_insn<big_endian>(p + 4, addi_12_12 + l(bs->first.dest_));
3513 write_insn<big_endian>(p + 8, mtctr_12);
3514 write_insn<big_endian>(p + 12, bctr);
3519 write_insn<big_endian>(p + 0, mflr_0);
3520 write_insn<big_endian>(p + 4, bcl_20_31);
3521 write_insn<big_endian>(p + 8, mflr_12);
3522 write_insn<big_endian>(p + 12, addis_12_12 + ha(delta));
3523 write_insn<big_endian>(p + 16, addi_12_12 + l(delta));
3524 write_insn<big_endian>(p + 20, mtlr_0);
3525 write_insn<big_endian>(p + 24, mtctr_12);
3526 write_insn<big_endian>(p + 28, bctr);
3532 // Write out .glink.
3534 template<int size, bool big_endian>
3536 Output_data_glink<size, big_endian>::do_write(Output_file* of)
3538 const section_size_type off = this->offset();
3539 const section_size_type oview_size =
3540 convert_to_section_size_type(this->data_size());
3541 unsigned char* const oview = of->get_output_view(off, oview_size);
3544 // The base address of the .plt section.
3545 typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
3546 Address plt_base = this->targ_->plt_section()->address();
3550 // Write pltresolve stub.
3552 Address after_bcl = this->address() + 16;
3553 Address pltoff = plt_base - after_bcl;
3555 elfcpp::Swap<64, big_endian>::writeval(p, pltoff), p += 8;
3557 write_insn<big_endian>(p, mflr_12), p += 4;
3558 write_insn<big_endian>(p, bcl_20_31), p += 4;
3559 write_insn<big_endian>(p, mflr_11), p += 4;
3560 write_insn<big_endian>(p, ld_2_11 + l(-16)), p += 4;
3561 write_insn<big_endian>(p, mtlr_12), p += 4;
3562 write_insn<big_endian>(p, add_12_2_11), p += 4;
3563 write_insn<big_endian>(p, ld_11_12 + 0), p += 4;
3564 write_insn<big_endian>(p, ld_2_12 + 8), p += 4;
3565 write_insn<big_endian>(p, mtctr_11), p += 4;
3566 write_insn<big_endian>(p, ld_11_12 + 16), p += 4;
3567 write_insn<big_endian>(p, bctr), p += 4;
3568 while (p < oview + this->pltresolve_size)
3569 write_insn<big_endian>(p, nop), p += 4;
3571 // Write lazy link call stubs.
3573 while (p < oview + oview_size)
3577 write_insn<big_endian>(p, li_0_0 + indx), p += 4;
3581 write_insn<big_endian>(p, lis_0_0 + hi(indx)), p += 4;
3582 write_insn<big_endian>(p, ori_0_0_0 + l(indx)), p += 4;
3584 uint32_t branch_off = 8 - (p - oview);
3585 write_insn<big_endian>(p, b + (branch_off & 0x3fffffc)), p += 4;
3591 const Output_data_got_powerpc<size, big_endian>* got
3592 = this->targ_->got_section();
3593 // The address of _GLOBAL_OFFSET_TABLE_.
3594 Address g_o_t = got->address() + got->g_o_t();
3596 // Write out pltresolve branch table.
3598 unsigned int the_end = oview_size - this->pltresolve_size;
3599 unsigned char* end_p = oview + the_end;
3600 while (p < end_p - 8 * 4)
3601 write_insn<big_endian>(p, b + end_p - p), p += 4;
3603 write_insn<big_endian>(p, nop), p += 4;
3605 // Write out pltresolve call stub.
3606 if (parameters->options().output_is_position_independent())
3608 Address res0_off = 0;
3609 Address after_bcl_off = the_end + 12;
3610 Address bcl_res0 = after_bcl_off - res0_off;
3612 write_insn<big_endian>(p + 0, addis_11_11 + ha(bcl_res0));
3613 write_insn<big_endian>(p + 4, mflr_0);
3614 write_insn<big_endian>(p + 8, bcl_20_31);
3615 write_insn<big_endian>(p + 12, addi_11_11 + l(bcl_res0));
3616 write_insn<big_endian>(p + 16, mflr_12);
3617 write_insn<big_endian>(p + 20, mtlr_0);
3618 write_insn<big_endian>(p + 24, sub_11_11_12);
3620 Address got_bcl = g_o_t + 4 - (after_bcl_off + this->address());
3622 write_insn<big_endian>(p + 28, addis_12_12 + ha(got_bcl));
3623 if (ha(got_bcl) == ha(got_bcl + 4))
3625 write_insn<big_endian>(p + 32, lwz_0_12 + l(got_bcl));
3626 write_insn<big_endian>(p + 36, lwz_12_12 + l(got_bcl + 4));
3630 write_insn<big_endian>(p + 32, lwzu_0_12 + l(got_bcl));
3631 write_insn<big_endian>(p + 36, lwz_12_12 + 4);
3633 write_insn<big_endian>(p + 40, mtctr_0);
3634 write_insn<big_endian>(p + 44, add_0_11_11);
3635 write_insn<big_endian>(p + 48, add_11_0_11);
3636 write_insn<big_endian>(p + 52, bctr);
3637 write_insn<big_endian>(p + 56, nop);
3638 write_insn<big_endian>(p + 60, nop);
3642 Address res0 = this->address();
3644 write_insn<big_endian>(p + 0, lis_12 + ha(g_o_t + 4));
3645 write_insn<big_endian>(p + 4, addis_11_11 + ha(-res0));
3646 if (ha(g_o_t + 4) == ha(g_o_t + 8))
3647 write_insn<big_endian>(p + 8, lwz_0_12 + l(g_o_t + 4));
3649 write_insn<big_endian>(p + 8, lwzu_0_12 + l(g_o_t + 4));
3650 write_insn<big_endian>(p + 12, addi_11_11 + l(-res0));
3651 write_insn<big_endian>(p + 16, mtctr_0);
3652 write_insn<big_endian>(p + 20, add_0_11_11);
3653 if (ha(g_o_t + 4) == ha(g_o_t + 8))
3654 write_insn<big_endian>(p + 24, lwz_12_12 + l(g_o_t + 8));
3656 write_insn<big_endian>(p + 24, lwz_12_12 + 4);
3657 write_insn<big_endian>(p + 28, add_11_0_11);
3658 write_insn<big_endian>(p + 32, bctr);
3659 write_insn<big_endian>(p + 36, nop);
3660 write_insn<big_endian>(p + 40, nop);
3661 write_insn<big_endian>(p + 44, nop);
3662 write_insn<big_endian>(p + 48, nop);
3663 write_insn<big_endian>(p + 52, nop);
3664 write_insn<big_endian>(p + 56, nop);
3665 write_insn<big_endian>(p + 60, nop);
3670 of->write_output_view(off, oview_size, oview);
3674 // A class to handle linker generated save/restore functions.
3676 template<int size, bool big_endian>
3677 class Output_data_save_res : public Output_section_data_build
3680 Output_data_save_res(Symbol_table* symtab);
3683 // Write to a map file.
3685 do_print_to_mapfile(Mapfile* mapfile) const
3686 { mapfile->print_output_data(this, _("** save/restore")); }
3689 do_write(Output_file*);
3692 // The maximum size of save/restore contents.
3693 static const unsigned int savres_max = 218*4;
3696 savres_define(Symbol_table* symtab,
3698 unsigned int lo, unsigned int hi,
3699 unsigned char* write_ent(unsigned char*, int),
3700 unsigned char* write_tail(unsigned char*, int));
3702 unsigned char *contents_;
3705 template<bool big_endian>
3706 static unsigned char*
3707 savegpr0(unsigned char* p, int r)
3709 uint32_t insn = std_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8;
3710 write_insn<big_endian>(p, insn);
3714 template<bool big_endian>
3715 static unsigned char*
3716 savegpr0_tail(unsigned char* p, int r)
3718 p = savegpr0<big_endian>(p, r);
3719 uint32_t insn = std_0_1 + 16;
3720 write_insn<big_endian>(p, insn);
3722 write_insn<big_endian>(p, blr);
3726 template<bool big_endian>
3727 static unsigned char*
3728 restgpr0(unsigned char* p, int r)
3730 uint32_t insn = ld_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8;
3731 write_insn<big_endian>(p, insn);
3735 template<bool big_endian>
3736 static unsigned char*
3737 restgpr0_tail(unsigned char* p, int r)
3739 uint32_t insn = ld_0_1 + 16;
3740 write_insn<big_endian>(p, insn);
3742 p = restgpr0<big_endian>(p, r);
3743 write_insn<big_endian>(p, mtlr_0);
3747 p = restgpr0<big_endian>(p, 30);
3748 p = restgpr0<big_endian>(p, 31);
3750 write_insn<big_endian>(p, blr);
3754 template<bool big_endian>
3755 static unsigned char*
3756 savegpr1(unsigned char* p, int r)
3758 uint32_t insn = std_0_12 + (r << 21) + (1 << 16) - (32 - r) * 8;
3759 write_insn<big_endian>(p, insn);
3763 template<bool big_endian>
3764 static unsigned char*
3765 savegpr1_tail(unsigned char* p, int r)
3767 p = savegpr1<big_endian>(p, r);
3768 write_insn<big_endian>(p, blr);
3772 template<bool big_endian>
3773 static unsigned char*
3774 restgpr1(unsigned char* p, int r)
3776 uint32_t insn = ld_0_12 + (r << 21) + (1 << 16) - (32 - r) * 8;
3777 write_insn<big_endian>(p, insn);
3781 template<bool big_endian>
3782 static unsigned char*
3783 restgpr1_tail(unsigned char* p, int r)
3785 p = restgpr1<big_endian>(p, r);
3786 write_insn<big_endian>(p, blr);
3790 template<bool big_endian>
3791 static unsigned char*
3792 savefpr(unsigned char* p, int r)
3794 uint32_t insn = stfd_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8;
3795 write_insn<big_endian>(p, insn);
3799 template<bool big_endian>
3800 static unsigned char*
3801 savefpr0_tail(unsigned char* p, int r)
3803 p = savefpr<big_endian>(p, r);
3804 write_insn<big_endian>(p, std_0_1 + 16);
3806 write_insn<big_endian>(p, blr);
3810 template<bool big_endian>
3811 static unsigned char*
3812 restfpr(unsigned char* p, int r)
3814 uint32_t insn = lfd_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8;
3815 write_insn<big_endian>(p, insn);
3819 template<bool big_endian>
3820 static unsigned char*
3821 restfpr0_tail(unsigned char* p, int r)
3823 write_insn<big_endian>(p, ld_0_1 + 16);
3825 p = restfpr<big_endian>(p, r);
3826 write_insn<big_endian>(p, mtlr_0);
3830 p = restfpr<big_endian>(p, 30);
3831 p = restfpr<big_endian>(p, 31);
3833 write_insn<big_endian>(p, blr);
3837 template<bool big_endian>
3838 static unsigned char*
3839 savefpr1_tail(unsigned char* p, int r)
3841 p = savefpr<big_endian>(p, r);
3842 write_insn<big_endian>(p, blr);
3846 template<bool big_endian>
3847 static unsigned char*
3848 restfpr1_tail(unsigned char* p, int r)
3850 p = restfpr<big_endian>(p, r);
3851 write_insn<big_endian>(p, blr);
3855 template<bool big_endian>
3856 static unsigned char*
3857 savevr(unsigned char* p, int r)
3859 uint32_t insn = li_12_0 + (1 << 16) - (32 - r) * 16;
3860 write_insn<big_endian>(p, insn);
3862 insn = stvx_0_12_0 + (r << 21);
3863 write_insn<big_endian>(p, insn);
3867 template<bool big_endian>
3868 static unsigned char*
3869 savevr_tail(unsigned char* p, int r)
3871 p = savevr<big_endian>(p, r);
3872 write_insn<big_endian>(p, blr);
3876 template<bool big_endian>
3877 static unsigned char*
3878 restvr(unsigned char* p, int r)
3880 uint32_t insn = li_12_0 + (1 << 16) - (32 - r) * 16;
3881 write_insn<big_endian>(p, insn);
3883 insn = lvx_0_12_0 + (r << 21);
3884 write_insn<big_endian>(p, insn);
3888 template<bool big_endian>
3889 static unsigned char*
3890 restvr_tail(unsigned char* p, int r)
3892 p = restvr<big_endian>(p, r);
3893 write_insn<big_endian>(p, blr);
3898 template<int size, bool big_endian>
3899 Output_data_save_res<size, big_endian>::Output_data_save_res(
3900 Symbol_table* symtab)
3901 : Output_section_data_build(4),
3904 this->savres_define(symtab,
3905 "_savegpr0_", 14, 31,
3906 savegpr0<big_endian>, savegpr0_tail<big_endian>);
3907 this->savres_define(symtab,
3908 "_restgpr0_", 14, 29,
3909 restgpr0<big_endian>, restgpr0_tail<big_endian>);
3910 this->savres_define(symtab,
3911 "_restgpr0_", 30, 31,
3912 restgpr0<big_endian>, restgpr0_tail<big_endian>);
3913 this->savres_define(symtab,
3914 "_savegpr1_", 14, 31,
3915 savegpr1<big_endian>, savegpr1_tail<big_endian>);
3916 this->savres_define(symtab,
3917 "_restgpr1_", 14, 31,
3918 restgpr1<big_endian>, restgpr1_tail<big_endian>);
3919 this->savres_define(symtab,
3920 "_savefpr_", 14, 31,
3921 savefpr<big_endian>, savefpr0_tail<big_endian>);
3922 this->savres_define(symtab,
3923 "_restfpr_", 14, 29,
3924 restfpr<big_endian>, restfpr0_tail<big_endian>);
3925 this->savres_define(symtab,
3926 "_restfpr_", 30, 31,
3927 restfpr<big_endian>, restfpr0_tail<big_endian>);
3928 this->savres_define(symtab,
3930 savefpr<big_endian>, savefpr1_tail<big_endian>);
3931 this->savres_define(symtab,
3933 restfpr<big_endian>, restfpr1_tail<big_endian>);
3934 this->savres_define(symtab,
3936 savevr<big_endian>, savevr_tail<big_endian>);
3937 this->savres_define(symtab,
3939 restvr<big_endian>, restvr_tail<big_endian>);
3942 template<int size, bool big_endian>
3944 Output_data_save_res<size, big_endian>::savres_define(
3945 Symbol_table* symtab,
3947 unsigned int lo, unsigned int hi,
3948 unsigned char* write_ent(unsigned char*, int),
3949 unsigned char* write_tail(unsigned char*, int))
3951 size_t len = strlen(name);
3952 bool writing = false;
3955 memcpy(sym, name, len);
3958 for (unsigned int i = lo; i <= hi; i++)
3960 sym[len + 0] = i / 10 + '0';
3961 sym[len + 1] = i % 10 + '0';
3962 Symbol* gsym = symtab->lookup(sym);
3963 bool refd = gsym != NULL && gsym->is_undefined();
3964 writing = writing || refd;
3967 if (this->contents_ == NULL)
3968 this->contents_ = new unsigned char[this->savres_max];
3970 section_size_type value = this->current_data_size();
3971 unsigned char* p = this->contents_ + value;
3973 p = write_ent(p, i);
3975 p = write_tail(p, i);
3976 section_size_type cur_size = p - this->contents_;
3977 this->set_current_data_size(cur_size);
3979 symtab->define_in_output_data(sym, NULL, Symbol_table::PREDEFINED,
3980 this, value, cur_size - value,
3981 elfcpp::STT_FUNC, elfcpp::STB_GLOBAL,
3982 elfcpp::STV_HIDDEN, 0, false, false);
3987 // Write out save/restore.
3989 template<int size, bool big_endian>
3991 Output_data_save_res<size, big_endian>::do_write(Output_file* of)
3993 const section_size_type off = this->offset();
3994 const section_size_type oview_size =
3995 convert_to_section_size_type(this->data_size());
3996 unsigned char* const oview = of->get_output_view(off, oview_size);
3997 memcpy(oview, this->contents_, oview_size);
3998 of->write_output_view(off, oview_size, oview);
4002 // Create the glink section.
4004 template<int size, bool big_endian>
4006 Target_powerpc<size, big_endian>::make_glink_section(Layout* layout)
4008 if (this->glink_ == NULL)
4010 this->glink_ = new Output_data_glink<size, big_endian>(this);
4011 layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS,
4012 elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR,
4013 this->glink_, ORDER_TEXT, false);
4017 // Create a PLT entry for a global symbol.
4019 template<int size, bool big_endian>
4021 Target_powerpc<size, big_endian>::make_plt_entry(Symbol_table* symtab,
4025 if (gsym->type() == elfcpp::STT_GNU_IFUNC
4026 && gsym->can_use_relative_reloc(false))
4028 if (this->iplt_ == NULL)
4029 this->make_iplt_section(symtab, layout);
4030 this->iplt_->add_ifunc_entry(gsym);
4034 if (this->plt_ == NULL)
4035 this->make_plt_section(symtab, layout);
4036 this->plt_->add_entry(gsym);
4040 // Make a PLT entry for a local STT_GNU_IFUNC symbol.
4042 template<int size, bool big_endian>
4044 Target_powerpc<size, big_endian>::make_local_ifunc_plt_entry(
4045 Symbol_table* symtab,
4047 Sized_relobj_file<size, big_endian>* relobj,
4050 if (this->iplt_ == NULL)
4051 this->make_iplt_section(symtab, layout);
4052 this->iplt_->add_local_ifunc_entry(relobj, r_sym);
4055 // Return the number of entries in the PLT.
4057 template<int size, bool big_endian>
4059 Target_powerpc<size, big_endian>::plt_entry_count() const
4061 if (this->plt_ == NULL)
4063 unsigned int count = this->plt_->entry_count();
4064 if (this->iplt_ != NULL)
4065 count += this->iplt_->entry_count();
4069 // Return the offset of the first non-reserved PLT entry.
4071 template<int size, bool big_endian>
4073 Target_powerpc<size, big_endian>::first_plt_entry_offset() const
4075 return this->plt_->first_plt_entry_offset();
4078 // Return the size of each PLT entry.
4080 template<int size, bool big_endian>
4082 Target_powerpc<size, big_endian>::plt_entry_size() const
4084 return Output_data_plt_powerpc<size, big_endian>::get_plt_entry_size();
4087 // Create a GOT entry for local dynamic __tls_get_addr calls.
4089 template<int size, bool big_endian>
4091 Target_powerpc<size, big_endian>::tlsld_got_offset(
4092 Symbol_table* symtab,
4094 Sized_relobj_file<size, big_endian>* object)
4096 if (this->tlsld_got_offset_ == -1U)
4098 gold_assert(symtab != NULL && layout != NULL && object != NULL);
4099 Reloc_section* rela_dyn = this->rela_dyn_section(layout);
4100 Output_data_got_powerpc<size, big_endian>* got
4101 = this->got_section(symtab, layout);
4102 unsigned int got_offset = got->add_constant_pair(0, 0);
4103 rela_dyn->add_local(object, 0, elfcpp::R_POWERPC_DTPMOD, got,
4105 this->tlsld_got_offset_ = got_offset;
4107 return this->tlsld_got_offset_;
4110 // Get the Reference_flags for a particular relocation.
4112 template<int size, bool big_endian>
4114 Target_powerpc<size, big_endian>::Scan::get_reference_flags(unsigned int r_type)
4118 case elfcpp::R_POWERPC_NONE:
4119 case elfcpp::R_POWERPC_GNU_VTINHERIT:
4120 case elfcpp::R_POWERPC_GNU_VTENTRY:
4121 case elfcpp::R_PPC64_TOC:
4122 // No symbol reference.
4125 case elfcpp::R_PPC64_ADDR64:
4126 case elfcpp::R_PPC64_UADDR64:
4127 case elfcpp::R_POWERPC_ADDR32:
4128 case elfcpp::R_POWERPC_UADDR32:
4129 case elfcpp::R_POWERPC_ADDR16:
4130 case elfcpp::R_POWERPC_UADDR16:
4131 case elfcpp::R_POWERPC_ADDR16_LO:
4132 case elfcpp::R_POWERPC_ADDR16_HI:
4133 case elfcpp::R_POWERPC_ADDR16_HA:
4134 return Symbol::ABSOLUTE_REF;
4136 case elfcpp::R_POWERPC_ADDR24:
4137 case elfcpp::R_POWERPC_ADDR14:
4138 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
4139 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
4140 return Symbol::FUNCTION_CALL | Symbol::ABSOLUTE_REF;
4142 case elfcpp::R_PPC64_REL64:
4143 case elfcpp::R_POWERPC_REL32:
4144 case elfcpp::R_PPC_LOCAL24PC:
4145 case elfcpp::R_POWERPC_REL16:
4146 case elfcpp::R_POWERPC_REL16_LO:
4147 case elfcpp::R_POWERPC_REL16_HI:
4148 case elfcpp::R_POWERPC_REL16_HA:
4149 return Symbol::RELATIVE_REF;
4151 case elfcpp::R_POWERPC_REL24:
4152 case elfcpp::R_PPC_PLTREL24:
4153 case elfcpp::R_POWERPC_REL14:
4154 case elfcpp::R_POWERPC_REL14_BRTAKEN:
4155 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
4156 return Symbol::FUNCTION_CALL | Symbol::RELATIVE_REF;
4158 case elfcpp::R_POWERPC_GOT16:
4159 case elfcpp::R_POWERPC_GOT16_LO:
4160 case elfcpp::R_POWERPC_GOT16_HI:
4161 case elfcpp::R_POWERPC_GOT16_HA:
4162 case elfcpp::R_PPC64_GOT16_DS:
4163 case elfcpp::R_PPC64_GOT16_LO_DS:
4164 case elfcpp::R_PPC64_TOC16:
4165 case elfcpp::R_PPC64_TOC16_LO:
4166 case elfcpp::R_PPC64_TOC16_HI:
4167 case elfcpp::R_PPC64_TOC16_HA:
4168 case elfcpp::R_PPC64_TOC16_DS:
4169 case elfcpp::R_PPC64_TOC16_LO_DS:
4171 return Symbol::ABSOLUTE_REF;
4173 case elfcpp::R_POWERPC_GOT_TPREL16:
4174 case elfcpp::R_POWERPC_TLS:
4175 return Symbol::TLS_REF;
4177 case elfcpp::R_POWERPC_COPY:
4178 case elfcpp::R_POWERPC_GLOB_DAT:
4179 case elfcpp::R_POWERPC_JMP_SLOT:
4180 case elfcpp::R_POWERPC_RELATIVE:
4181 case elfcpp::R_POWERPC_DTPMOD:
4183 // Not expected. We will give an error later.
4188 // Report an unsupported relocation against a local symbol.
4190 template<int size, bool big_endian>
4192 Target_powerpc<size, big_endian>::Scan::unsupported_reloc_local(
4193 Sized_relobj_file<size, big_endian>* object,
4194 unsigned int r_type)
4196 gold_error(_("%s: unsupported reloc %u against local symbol"),
4197 object->name().c_str(), r_type);
4200 // We are about to emit a dynamic relocation of type R_TYPE. If the
4201 // dynamic linker does not support it, issue an error.
4203 template<int size, bool big_endian>
4205 Target_powerpc<size, big_endian>::Scan::check_non_pic(Relobj* object,
4206 unsigned int r_type)
4208 gold_assert(r_type != elfcpp::R_POWERPC_NONE);
4210 // These are the relocation types supported by glibc for both 32-bit
4211 // and 64-bit powerpc.
4214 case elfcpp::R_POWERPC_NONE:
4215 case elfcpp::R_POWERPC_RELATIVE:
4216 case elfcpp::R_POWERPC_GLOB_DAT:
4217 case elfcpp::R_POWERPC_DTPMOD:
4218 case elfcpp::R_POWERPC_DTPREL:
4219 case elfcpp::R_POWERPC_TPREL:
4220 case elfcpp::R_POWERPC_JMP_SLOT:
4221 case elfcpp::R_POWERPC_COPY:
4222 case elfcpp::R_POWERPC_IRELATIVE:
4223 case elfcpp::R_POWERPC_ADDR32:
4224 case elfcpp::R_POWERPC_UADDR32:
4225 case elfcpp::R_POWERPC_ADDR24:
4226 case elfcpp::R_POWERPC_ADDR16:
4227 case elfcpp::R_POWERPC_UADDR16:
4228 case elfcpp::R_POWERPC_ADDR16_LO:
4229 case elfcpp::R_POWERPC_ADDR16_HI:
4230 case elfcpp::R_POWERPC_ADDR16_HA:
4231 case elfcpp::R_POWERPC_ADDR14:
4232 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
4233 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
4234 case elfcpp::R_POWERPC_REL32:
4235 case elfcpp::R_POWERPC_REL24:
4236 case elfcpp::R_POWERPC_TPREL16:
4237 case elfcpp::R_POWERPC_TPREL16_LO:
4238 case elfcpp::R_POWERPC_TPREL16_HI:
4239 case elfcpp::R_POWERPC_TPREL16_HA:
4250 // These are the relocation types supported only on 64-bit.
4251 case elfcpp::R_PPC64_ADDR64:
4252 case elfcpp::R_PPC64_UADDR64:
4253 case elfcpp::R_PPC64_JMP_IREL:
4254 case elfcpp::R_PPC64_ADDR16_DS:
4255 case elfcpp::R_PPC64_ADDR16_LO_DS:
4256 case elfcpp::R_PPC64_ADDR16_HIGHER:
4257 case elfcpp::R_PPC64_ADDR16_HIGHEST:
4258 case elfcpp::R_PPC64_ADDR16_HIGHERA:
4259 case elfcpp::R_PPC64_ADDR16_HIGHESTA:
4260 case elfcpp::R_PPC64_REL64:
4261 case elfcpp::R_POWERPC_ADDR30:
4262 case elfcpp::R_PPC64_TPREL16_DS:
4263 case elfcpp::R_PPC64_TPREL16_LO_DS:
4264 case elfcpp::R_PPC64_TPREL16_HIGHER:
4265 case elfcpp::R_PPC64_TPREL16_HIGHEST:
4266 case elfcpp::R_PPC64_TPREL16_HIGHERA:
4267 case elfcpp::R_PPC64_TPREL16_HIGHESTA:
4278 // These are the relocation types supported only on 32-bit.
4279 // ??? glibc ld.so doesn't need to support these.
4280 case elfcpp::R_POWERPC_DTPREL16:
4281 case elfcpp::R_POWERPC_DTPREL16_LO:
4282 case elfcpp::R_POWERPC_DTPREL16_HI:
4283 case elfcpp::R_POWERPC_DTPREL16_HA:
4291 // This prevents us from issuing more than one error per reloc
4292 // section. But we can still wind up issuing more than one
4293 // error per object file.
4294 if (this->issued_non_pic_error_)
4296 gold_assert(parameters->options().output_is_position_independent());
4297 object->error(_("requires unsupported dynamic reloc; "
4298 "recompile with -fPIC"));
4299 this->issued_non_pic_error_ = true;
4303 // Return whether we need to make a PLT entry for a relocation of the
4304 // given type against a STT_GNU_IFUNC symbol.
4306 template<int size, bool big_endian>
4308 Target_powerpc<size, big_endian>::Scan::reloc_needs_plt_for_ifunc(
4309 Sized_relobj_file<size, big_endian>* object,
4310 unsigned int r_type)
4312 // In non-pic code any reference will resolve to the plt call stub
4313 // for the ifunc symbol.
4314 if (size == 32 && !parameters->options().output_is_position_independent())
4319 // Word size refs from data sections are OK.
4320 case elfcpp::R_POWERPC_ADDR32:
4321 case elfcpp::R_POWERPC_UADDR32:
4326 case elfcpp::R_PPC64_ADDR64:
4327 case elfcpp::R_PPC64_UADDR64:
4332 // GOT refs are good.
4333 case elfcpp::R_POWERPC_GOT16:
4334 case elfcpp::R_POWERPC_GOT16_LO:
4335 case elfcpp::R_POWERPC_GOT16_HI:
4336 case elfcpp::R_POWERPC_GOT16_HA:
4337 case elfcpp::R_PPC64_GOT16_DS:
4338 case elfcpp::R_PPC64_GOT16_LO_DS:
4341 // So are function calls.
4342 case elfcpp::R_POWERPC_ADDR24:
4343 case elfcpp::R_POWERPC_ADDR14:
4344 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
4345 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
4346 case elfcpp::R_POWERPC_REL24:
4347 case elfcpp::R_PPC_PLTREL24:
4348 case elfcpp::R_POWERPC_REL14:
4349 case elfcpp::R_POWERPC_REL14_BRTAKEN:
4350 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
4357 // Anything else is a problem.
4358 // If we are building a static executable, the libc startup function
4359 // responsible for applying indirect function relocations is going
4360 // to complain about the reloc type.
4361 // If we are building a dynamic executable, we will have a text
4362 // relocation. The dynamic loader will set the text segment
4363 // writable and non-executable to apply text relocations. So we'll
4364 // segfault when trying to run the indirection function to resolve
4366 gold_error(_("%s: unsupported reloc %u for IFUNC symbol"),
4367 object->name().c_str(), r_type);
4371 // Scan a relocation for a local symbol.
4373 template<int size, bool big_endian>
4375 Target_powerpc<size, big_endian>::Scan::local(
4376 Symbol_table* symtab,
4378 Target_powerpc<size, big_endian>* target,
4379 Sized_relobj_file<size, big_endian>* object,
4380 unsigned int data_shndx,
4381 Output_section* output_section,
4382 const elfcpp::Rela<size, big_endian>& reloc,
4383 unsigned int r_type,
4384 const elfcpp::Sym<size, big_endian>& lsym,
4387 Powerpc_relobj<size, big_endian>* ppc_object
4388 = static_cast<Powerpc_relobj<size, big_endian>*>(object);
4393 && data_shndx == ppc_object->opd_shndx()
4394 && r_type == elfcpp::R_PPC64_ADDR64)
4395 ppc_object->set_opd_discard(reloc.get_r_offset());
4399 // A local STT_GNU_IFUNC symbol may require a PLT entry.
4400 bool is_ifunc = lsym.get_st_type() == elfcpp::STT_GNU_IFUNC;
4401 if (is_ifunc && this->reloc_needs_plt_for_ifunc(object, r_type))
4403 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
4404 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
4405 r_type, r_sym, reloc.get_r_addend());
4406 target->make_local_ifunc_plt_entry(symtab, layout, object, r_sym);
4411 case elfcpp::R_POWERPC_NONE:
4412 case elfcpp::R_POWERPC_GNU_VTINHERIT:
4413 case elfcpp::R_POWERPC_GNU_VTENTRY:
4414 case elfcpp::R_PPC64_TOCSAVE:
4415 case elfcpp::R_PPC_EMB_MRKREF:
4416 case elfcpp::R_POWERPC_TLS:
4419 case elfcpp::R_PPC64_TOC:
4421 Output_data_got_powerpc<size, big_endian>* got
4422 = target->got_section(symtab, layout);
4423 if (parameters->options().output_is_position_independent())
4425 Address off = reloc.get_r_offset();
4427 && data_shndx == ppc_object->opd_shndx()
4428 && ppc_object->get_opd_discard(off - 8))
4431 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
4432 Powerpc_relobj<size, big_endian>* symobj = ppc_object;
4433 rela_dyn->add_output_section_relative(got->output_section(),
4434 elfcpp::R_POWERPC_RELATIVE,
4436 object, data_shndx, off,
4437 symobj->toc_base_offset());
4442 case elfcpp::R_PPC64_ADDR64:
4443 case elfcpp::R_PPC64_UADDR64:
4444 case elfcpp::R_POWERPC_ADDR32:
4445 case elfcpp::R_POWERPC_UADDR32:
4446 case elfcpp::R_POWERPC_ADDR24:
4447 case elfcpp::R_POWERPC_ADDR16:
4448 case elfcpp::R_POWERPC_ADDR16_LO:
4449 case elfcpp::R_POWERPC_ADDR16_HI:
4450 case elfcpp::R_POWERPC_ADDR16_HA:
4451 case elfcpp::R_POWERPC_UADDR16:
4452 case elfcpp::R_PPC64_ADDR16_HIGHER:
4453 case elfcpp::R_PPC64_ADDR16_HIGHERA:
4454 case elfcpp::R_PPC64_ADDR16_HIGHEST:
4455 case elfcpp::R_PPC64_ADDR16_HIGHESTA:
4456 case elfcpp::R_PPC64_ADDR16_DS:
4457 case elfcpp::R_PPC64_ADDR16_LO_DS:
4458 case elfcpp::R_POWERPC_ADDR14:
4459 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
4460 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
4461 // If building a shared library (or a position-independent
4462 // executable), we need to create a dynamic relocation for
4464 if (parameters->options().output_is_position_independent()
4465 || (size == 64 && is_ifunc))
4467 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
4469 if ((size == 32 && r_type == elfcpp::R_POWERPC_ADDR32)
4470 || (size == 64 && r_type == elfcpp::R_PPC64_ADDR64))
4472 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
4473 unsigned int dynrel = elfcpp::R_POWERPC_RELATIVE;
4476 rela_dyn = target->iplt_section()->rel_plt();
4477 dynrel = elfcpp::R_POWERPC_IRELATIVE;
4479 rela_dyn->add_local_relative(object, r_sym, dynrel,
4480 output_section, data_shndx,
4481 reloc.get_r_offset(),
4482 reloc.get_r_addend(), false);
4486 check_non_pic(object, r_type);
4487 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
4488 rela_dyn->add_local(object, r_sym, r_type, output_section,
4489 data_shndx, reloc.get_r_offset(),
4490 reloc.get_r_addend());
4495 case elfcpp::R_POWERPC_REL24:
4496 case elfcpp::R_PPC_PLTREL24:
4497 case elfcpp::R_PPC_LOCAL24PC:
4498 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
4499 r_type, elfcpp::elf_r_sym<size>(reloc.get_r_info()),
4500 reloc.get_r_addend());
4503 case elfcpp::R_POWERPC_REL14:
4504 case elfcpp::R_POWERPC_REL14_BRTAKEN:
4505 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
4506 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
4507 r_type, elfcpp::elf_r_sym<size>(reloc.get_r_info()),
4508 reloc.get_r_addend());
4511 case elfcpp::R_PPC64_REL64:
4512 case elfcpp::R_POWERPC_REL32:
4513 case elfcpp::R_POWERPC_REL16:
4514 case elfcpp::R_POWERPC_REL16_LO:
4515 case elfcpp::R_POWERPC_REL16_HI:
4516 case elfcpp::R_POWERPC_REL16_HA:
4517 case elfcpp::R_POWERPC_SECTOFF:
4518 case elfcpp::R_POWERPC_TPREL16:
4519 case elfcpp::R_POWERPC_DTPREL16:
4520 case elfcpp::R_POWERPC_SECTOFF_LO:
4521 case elfcpp::R_POWERPC_TPREL16_LO:
4522 case elfcpp::R_POWERPC_DTPREL16_LO:
4523 case elfcpp::R_POWERPC_SECTOFF_HI:
4524 case elfcpp::R_POWERPC_TPREL16_HI:
4525 case elfcpp::R_POWERPC_DTPREL16_HI:
4526 case elfcpp::R_POWERPC_SECTOFF_HA:
4527 case elfcpp::R_POWERPC_TPREL16_HA:
4528 case elfcpp::R_POWERPC_DTPREL16_HA:
4529 case elfcpp::R_PPC64_DTPREL16_HIGHER:
4530 case elfcpp::R_PPC64_TPREL16_HIGHER:
4531 case elfcpp::R_PPC64_DTPREL16_HIGHERA:
4532 case elfcpp::R_PPC64_TPREL16_HIGHERA:
4533 case elfcpp::R_PPC64_DTPREL16_HIGHEST:
4534 case elfcpp::R_PPC64_TPREL16_HIGHEST:
4535 case elfcpp::R_PPC64_DTPREL16_HIGHESTA:
4536 case elfcpp::R_PPC64_TPREL16_HIGHESTA:
4537 case elfcpp::R_PPC64_TPREL16_DS:
4538 case elfcpp::R_PPC64_TPREL16_LO_DS:
4539 case elfcpp::R_PPC64_DTPREL16_DS:
4540 case elfcpp::R_PPC64_DTPREL16_LO_DS:
4541 case elfcpp::R_PPC64_SECTOFF_DS:
4542 case elfcpp::R_PPC64_SECTOFF_LO_DS:
4543 case elfcpp::R_PPC64_TLSGD:
4544 case elfcpp::R_PPC64_TLSLD:
4547 case elfcpp::R_POWERPC_GOT16:
4548 case elfcpp::R_POWERPC_GOT16_LO:
4549 case elfcpp::R_POWERPC_GOT16_HI:
4550 case elfcpp::R_POWERPC_GOT16_HA:
4551 case elfcpp::R_PPC64_GOT16_DS:
4552 case elfcpp::R_PPC64_GOT16_LO_DS:
4554 // The symbol requires a GOT entry.
4555 Output_data_got_powerpc<size, big_endian>* got
4556 = target->got_section(symtab, layout);
4557 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
4559 if (!parameters->options().output_is_position_independent())
4561 if (size == 32 && is_ifunc)
4562 got->add_local_plt(object, r_sym, GOT_TYPE_STANDARD);
4564 got->add_local(object, r_sym, GOT_TYPE_STANDARD);
4566 else if (!object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD))
4568 // If we are generating a shared object or a pie, this
4569 // symbol's GOT entry will be set by a dynamic relocation.
4571 off = got->add_constant(0);
4572 object->set_local_got_offset(r_sym, GOT_TYPE_STANDARD, off);
4574 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
4575 unsigned int dynrel = elfcpp::R_POWERPC_RELATIVE;
4578 rela_dyn = target->iplt_section()->rel_plt();
4579 dynrel = elfcpp::R_POWERPC_IRELATIVE;
4581 rela_dyn->add_local_relative(object, r_sym, dynrel,
4582 got, off, 0, false);
4587 case elfcpp::R_PPC64_TOC16:
4588 case elfcpp::R_PPC64_TOC16_LO:
4589 case elfcpp::R_PPC64_TOC16_HI:
4590 case elfcpp::R_PPC64_TOC16_HA:
4591 case elfcpp::R_PPC64_TOC16_DS:
4592 case elfcpp::R_PPC64_TOC16_LO_DS:
4593 // We need a GOT section.
4594 target->got_section(symtab, layout);
4597 case elfcpp::R_POWERPC_GOT_TLSGD16:
4598 case elfcpp::R_POWERPC_GOT_TLSGD16_LO:
4599 case elfcpp::R_POWERPC_GOT_TLSGD16_HI:
4600 case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
4602 const tls::Tls_optimization tls_type = target->optimize_tls_gd(true);
4603 if (tls_type == tls::TLSOPT_NONE)
4605 Output_data_got_powerpc<size, big_endian>* got
4606 = target->got_section(symtab, layout);
4607 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
4608 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
4609 got->add_local_tls_pair(object, r_sym, GOT_TYPE_TLSGD,
4610 rela_dyn, elfcpp::R_POWERPC_DTPMOD);
4612 else if (tls_type == tls::TLSOPT_TO_LE)
4614 // no GOT relocs needed for Local Exec.
4621 case elfcpp::R_POWERPC_GOT_TLSLD16:
4622 case elfcpp::R_POWERPC_GOT_TLSLD16_LO:
4623 case elfcpp::R_POWERPC_GOT_TLSLD16_HI:
4624 case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
4626 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
4627 if (tls_type == tls::TLSOPT_NONE)
4628 target->tlsld_got_offset(symtab, layout, object);
4629 else if (tls_type == tls::TLSOPT_TO_LE)
4631 // no GOT relocs needed for Local Exec.
4632 if (parameters->options().emit_relocs())
4634 Output_section* os = layout->tls_segment()->first_section();
4635 gold_assert(os != NULL);
4636 os->set_needs_symtab_index();
4644 case elfcpp::R_POWERPC_GOT_DTPREL16:
4645 case elfcpp::R_POWERPC_GOT_DTPREL16_LO:
4646 case elfcpp::R_POWERPC_GOT_DTPREL16_HI:
4647 case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
4649 Output_data_got_powerpc<size, big_endian>* got
4650 = target->got_section(symtab, layout);
4651 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
4652 got->add_local_tls(object, r_sym, GOT_TYPE_DTPREL);
4656 case elfcpp::R_POWERPC_GOT_TPREL16:
4657 case elfcpp::R_POWERPC_GOT_TPREL16_LO:
4658 case elfcpp::R_POWERPC_GOT_TPREL16_HI:
4659 case elfcpp::R_POWERPC_GOT_TPREL16_HA:
4661 const tls::Tls_optimization tls_type = target->optimize_tls_ie(true);
4662 if (tls_type == tls::TLSOPT_NONE)
4664 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
4665 if (!object->local_has_got_offset(r_sym, GOT_TYPE_TPREL))
4667 Output_data_got_powerpc<size, big_endian>* got
4668 = target->got_section(symtab, layout);
4669 unsigned int off = got->add_constant(0);
4670 object->set_local_got_offset(r_sym, GOT_TYPE_TPREL, off);
4672 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
4673 rela_dyn->add_symbolless_local_addend(object, r_sym,
4674 elfcpp::R_POWERPC_TPREL,
4678 else if (tls_type == tls::TLSOPT_TO_LE)
4680 // no GOT relocs needed for Local Exec.
4688 unsupported_reloc_local(object, r_type);
4693 // Report an unsupported relocation against a global symbol.
4695 template<int size, bool big_endian>
4697 Target_powerpc<size, big_endian>::Scan::unsupported_reloc_global(
4698 Sized_relobj_file<size, big_endian>* object,
4699 unsigned int r_type,
4702 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
4703 object->name().c_str(), r_type, gsym->demangled_name().c_str());
4706 // Scan a relocation for a global symbol.
4708 template<int size, bool big_endian>
4710 Target_powerpc<size, big_endian>::Scan::global(
4711 Symbol_table* symtab,
4713 Target_powerpc<size, big_endian>* target,
4714 Sized_relobj_file<size, big_endian>* object,
4715 unsigned int data_shndx,
4716 Output_section* output_section,
4717 const elfcpp::Rela<size, big_endian>& reloc,
4718 unsigned int r_type,
4721 Powerpc_relobj<size, big_endian>* ppc_object
4722 = static_cast<Powerpc_relobj<size, big_endian>*>(object);
4724 // A STT_GNU_IFUNC symbol may require a PLT entry.
4725 if (gsym->type() == elfcpp::STT_GNU_IFUNC
4726 && this->reloc_needs_plt_for_ifunc(object, r_type))
4728 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
4729 r_type, elfcpp::elf_r_sym<size>(reloc.get_r_info()),
4730 reloc.get_r_addend());
4731 target->make_plt_entry(symtab, layout, gsym);
4736 case elfcpp::R_POWERPC_NONE:
4737 case elfcpp::R_POWERPC_GNU_VTINHERIT:
4738 case elfcpp::R_POWERPC_GNU_VTENTRY:
4739 case elfcpp::R_PPC_LOCAL24PC:
4740 case elfcpp::R_PPC_EMB_MRKREF:
4741 case elfcpp::R_POWERPC_TLS:
4744 case elfcpp::R_PPC64_TOC:
4746 Output_data_got_powerpc<size, big_endian>* got
4747 = target->got_section(symtab, layout);
4748 if (parameters->options().output_is_position_independent())
4750 Address off = reloc.get_r_offset();
4752 && data_shndx == ppc_object->opd_shndx()
4753 && ppc_object->get_opd_discard(off - 8))
4756 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
4757 Powerpc_relobj<size, big_endian>* symobj = ppc_object;
4758 if (data_shndx != ppc_object->opd_shndx())
4759 symobj = static_cast
4760 <Powerpc_relobj<size, big_endian>*>(gsym->object());
4761 rela_dyn->add_output_section_relative(got->output_section(),
4762 elfcpp::R_POWERPC_RELATIVE,
4764 object, data_shndx, off,
4765 symobj->toc_base_offset());
4770 case elfcpp::R_PPC64_ADDR64:
4772 && data_shndx == ppc_object->opd_shndx()
4773 && (gsym->is_defined_in_discarded_section()
4774 || gsym->object() != object))
4776 ppc_object->set_opd_discard(reloc.get_r_offset());
4780 case elfcpp::R_PPC64_UADDR64:
4781 case elfcpp::R_POWERPC_ADDR32:
4782 case elfcpp::R_POWERPC_UADDR32:
4783 case elfcpp::R_POWERPC_ADDR24:
4784 case elfcpp::R_POWERPC_ADDR16:
4785 case elfcpp::R_POWERPC_ADDR16_LO:
4786 case elfcpp::R_POWERPC_ADDR16_HI:
4787 case elfcpp::R_POWERPC_ADDR16_HA:
4788 case elfcpp::R_POWERPC_UADDR16:
4789 case elfcpp::R_PPC64_ADDR16_HIGHER:
4790 case elfcpp::R_PPC64_ADDR16_HIGHERA:
4791 case elfcpp::R_PPC64_ADDR16_HIGHEST:
4792 case elfcpp::R_PPC64_ADDR16_HIGHESTA:
4793 case elfcpp::R_PPC64_ADDR16_DS:
4794 case elfcpp::R_PPC64_ADDR16_LO_DS:
4795 case elfcpp::R_POWERPC_ADDR14:
4796 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
4797 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
4799 // Make a PLT entry if necessary.
4800 if (gsym->needs_plt_entry())
4802 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
4804 elfcpp::elf_r_sym<size>(reloc.get_r_info()),
4805 reloc.get_r_addend());
4806 target->make_plt_entry(symtab, layout, gsym);
4807 // Since this is not a PC-relative relocation, we may be
4808 // taking the address of a function. In that case we need to
4809 // set the entry in the dynamic symbol table to the address of
4810 // the PLT call stub.
4812 && gsym->is_from_dynobj()
4813 && !parameters->options().output_is_position_independent())
4814 gsym->set_needs_dynsym_value();
4816 // Make a dynamic relocation if necessary.
4817 if (needs_dynamic_reloc<size>(gsym, Scan::get_reference_flags(r_type))
4818 || (size == 64 && gsym->type() == elfcpp::STT_GNU_IFUNC))
4820 if (gsym->may_need_copy_reloc())
4822 target->copy_reloc(symtab, layout, object,
4823 data_shndx, output_section, gsym, reloc);
4825 else if ((size == 32
4826 && r_type == elfcpp::R_POWERPC_ADDR32
4827 && gsym->can_use_relative_reloc(false)
4828 && !(gsym->visibility() == elfcpp::STV_PROTECTED
4829 && parameters->options().shared()))
4831 && r_type == elfcpp::R_PPC64_ADDR64
4832 && (gsym->can_use_relative_reloc(false)
4833 || data_shndx == ppc_object->opd_shndx())))
4835 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
4836 unsigned int dynrel = elfcpp::R_POWERPC_RELATIVE;
4837 if (gsym->type() == elfcpp::STT_GNU_IFUNC)
4839 rela_dyn = target->iplt_section()->rel_plt();
4840 dynrel = elfcpp::R_POWERPC_IRELATIVE;
4842 rela_dyn->add_symbolless_global_addend(
4843 gsym, dynrel, output_section, object, data_shndx,
4844 reloc.get_r_offset(), reloc.get_r_addend());
4848 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
4849 check_non_pic(object, r_type);
4850 rela_dyn->add_global(gsym, r_type, output_section,
4852 reloc.get_r_offset(),
4853 reloc.get_r_addend());
4859 case elfcpp::R_PPC_PLTREL24:
4860 case elfcpp::R_POWERPC_REL24:
4861 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
4862 r_type, elfcpp::elf_r_sym<size>(reloc.get_r_info()),
4863 reloc.get_r_addend());
4864 if (gsym->needs_plt_entry()
4865 || (!gsym->final_value_is_known()
4866 && (gsym->is_undefined()
4867 || gsym->is_from_dynobj()
4868 || gsym->is_preemptible())))
4869 target->make_plt_entry(symtab, layout, gsym);
4872 case elfcpp::R_PPC64_REL64:
4873 case elfcpp::R_POWERPC_REL32:
4874 // Make a dynamic relocation if necessary.
4875 if (needs_dynamic_reloc<size>(gsym, Scan::get_reference_flags(r_type)))
4877 if (gsym->may_need_copy_reloc())
4879 target->copy_reloc(symtab, layout, object,
4880 data_shndx, output_section, gsym,
4885 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
4886 check_non_pic(object, r_type);
4887 rela_dyn->add_global(gsym, r_type, output_section, object,
4888 data_shndx, reloc.get_r_offset(),
4889 reloc.get_r_addend());
4894 case elfcpp::R_POWERPC_REL14:
4895 case elfcpp::R_POWERPC_REL14_BRTAKEN:
4896 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
4897 target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
4898 r_type, elfcpp::elf_r_sym<size>(reloc.get_r_info()),
4899 reloc.get_r_addend());
4902 case elfcpp::R_POWERPC_REL16:
4903 case elfcpp::R_POWERPC_REL16_LO:
4904 case elfcpp::R_POWERPC_REL16_HI:
4905 case elfcpp::R_POWERPC_REL16_HA:
4906 case elfcpp::R_POWERPC_SECTOFF:
4907 case elfcpp::R_POWERPC_TPREL16:
4908 case elfcpp::R_POWERPC_DTPREL16:
4909 case elfcpp::R_POWERPC_SECTOFF_LO:
4910 case elfcpp::R_POWERPC_TPREL16_LO:
4911 case elfcpp::R_POWERPC_DTPREL16_LO:
4912 case elfcpp::R_POWERPC_SECTOFF_HI:
4913 case elfcpp::R_POWERPC_TPREL16_HI:
4914 case elfcpp::R_POWERPC_DTPREL16_HI:
4915 case elfcpp::R_POWERPC_SECTOFF_HA:
4916 case elfcpp::R_POWERPC_TPREL16_HA:
4917 case elfcpp::R_POWERPC_DTPREL16_HA:
4918 case elfcpp::R_PPC64_DTPREL16_HIGHER:
4919 case elfcpp::R_PPC64_TPREL16_HIGHER:
4920 case elfcpp::R_PPC64_DTPREL16_HIGHERA:
4921 case elfcpp::R_PPC64_TPREL16_HIGHERA:
4922 case elfcpp::R_PPC64_DTPREL16_HIGHEST:
4923 case elfcpp::R_PPC64_TPREL16_HIGHEST:
4924 case elfcpp::R_PPC64_DTPREL16_HIGHESTA:
4925 case elfcpp::R_PPC64_TPREL16_HIGHESTA:
4926 case elfcpp::R_PPC64_TPREL16_DS:
4927 case elfcpp::R_PPC64_TPREL16_LO_DS:
4928 case elfcpp::R_PPC64_DTPREL16_DS:
4929 case elfcpp::R_PPC64_DTPREL16_LO_DS:
4930 case elfcpp::R_PPC64_SECTOFF_DS:
4931 case elfcpp::R_PPC64_SECTOFF_LO_DS:
4932 case elfcpp::R_PPC64_TLSGD:
4933 case elfcpp::R_PPC64_TLSLD:
4936 case elfcpp::R_POWERPC_GOT16:
4937 case elfcpp::R_POWERPC_GOT16_LO:
4938 case elfcpp::R_POWERPC_GOT16_HI:
4939 case elfcpp::R_POWERPC_GOT16_HA:
4940 case elfcpp::R_PPC64_GOT16_DS:
4941 case elfcpp::R_PPC64_GOT16_LO_DS:
4943 // The symbol requires a GOT entry.
4944 Output_data_got_powerpc<size, big_endian>* got;
4946 got = target->got_section(symtab, layout);
4947 if (gsym->final_value_is_known())
4949 if (size == 32 && gsym->type() == elfcpp::STT_GNU_IFUNC)
4950 got->add_global_plt(gsym, GOT_TYPE_STANDARD);
4952 got->add_global(gsym, GOT_TYPE_STANDARD);
4954 else if (!gsym->has_got_offset(GOT_TYPE_STANDARD))
4956 // If we are generating a shared object or a pie, this
4957 // symbol's GOT entry will be set by a dynamic relocation.
4958 unsigned int off = got->add_constant(0);
4959 gsym->set_got_offset(GOT_TYPE_STANDARD, off);
4961 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
4962 if (gsym->can_use_relative_reloc(false)
4964 && gsym->visibility() == elfcpp::STV_PROTECTED
4965 && parameters->options().shared()))
4967 unsigned int dynrel = elfcpp::R_POWERPC_RELATIVE;
4968 if (gsym->type() == elfcpp::STT_GNU_IFUNC)
4970 rela_dyn = target->iplt_section()->rel_plt();
4971 dynrel = elfcpp::R_POWERPC_IRELATIVE;
4973 rela_dyn->add_global_relative(gsym, dynrel, got, off, 0, false);
4977 unsigned int dynrel = elfcpp::R_POWERPC_GLOB_DAT;
4978 rela_dyn->add_global(gsym, dynrel, got, off, 0);
4984 case elfcpp::R_PPC64_TOC16:
4985 case elfcpp::R_PPC64_TOC16_LO:
4986 case elfcpp::R_PPC64_TOC16_HI:
4987 case elfcpp::R_PPC64_TOC16_HA:
4988 case elfcpp::R_PPC64_TOC16_DS:
4989 case elfcpp::R_PPC64_TOC16_LO_DS:
4990 // We need a GOT section.
4991 target->got_section(symtab, layout);
4994 case elfcpp::R_POWERPC_GOT_TLSGD16:
4995 case elfcpp::R_POWERPC_GOT_TLSGD16_LO:
4996 case elfcpp::R_POWERPC_GOT_TLSGD16_HI:
4997 case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
4999 const bool final = gsym->final_value_is_known();
5000 const tls::Tls_optimization tls_type = target->optimize_tls_gd(final);
5001 if (tls_type == tls::TLSOPT_NONE)
5003 Output_data_got_powerpc<size, big_endian>* got
5004 = target->got_section(symtab, layout);
5005 got->add_global_pair_with_rel(gsym, GOT_TYPE_TLSGD,
5006 target->rela_dyn_section(layout),
5007 elfcpp::R_POWERPC_DTPMOD,
5008 elfcpp::R_POWERPC_DTPREL);
5010 else if (tls_type == tls::TLSOPT_TO_IE)
5012 if (!gsym->has_got_offset(GOT_TYPE_TPREL))
5014 Output_data_got_powerpc<size, big_endian>* got
5015 = target->got_section(symtab, layout);
5016 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
5017 if (gsym->is_undefined()
5018 || gsym->is_from_dynobj())
5020 got->add_global_with_rel(gsym, GOT_TYPE_TPREL, rela_dyn,
5021 elfcpp::R_POWERPC_TPREL);
5025 unsigned int off = got->add_constant(0);
5026 gsym->set_got_offset(GOT_TYPE_TPREL, off);
5027 unsigned int dynrel = elfcpp::R_POWERPC_TPREL;
5028 rela_dyn->add_symbolless_global_addend(gsym, dynrel,
5033 else if (tls_type == tls::TLSOPT_TO_LE)
5035 // no GOT relocs needed for Local Exec.
5042 case elfcpp::R_POWERPC_GOT_TLSLD16:
5043 case elfcpp::R_POWERPC_GOT_TLSLD16_LO:
5044 case elfcpp::R_POWERPC_GOT_TLSLD16_HI:
5045 case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
5047 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
5048 if (tls_type == tls::TLSOPT_NONE)
5049 target->tlsld_got_offset(symtab, layout, object);
5050 else if (tls_type == tls::TLSOPT_TO_LE)
5052 // no GOT relocs needed for Local Exec.
5053 if (parameters->options().emit_relocs())
5055 Output_section* os = layout->tls_segment()->first_section();
5056 gold_assert(os != NULL);
5057 os->set_needs_symtab_index();
5065 case elfcpp::R_POWERPC_GOT_DTPREL16:
5066 case elfcpp::R_POWERPC_GOT_DTPREL16_LO:
5067 case elfcpp::R_POWERPC_GOT_DTPREL16_HI:
5068 case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
5070 Output_data_got_powerpc<size, big_endian>* got
5071 = target->got_section(symtab, layout);
5072 if (!gsym->final_value_is_known()
5073 && (gsym->is_from_dynobj()
5074 || gsym->is_undefined()
5075 || gsym->is_preemptible()))
5076 got->add_global_with_rel(gsym, GOT_TYPE_DTPREL,
5077 target->rela_dyn_section(layout),
5078 elfcpp::R_POWERPC_DTPREL);
5080 got->add_global_tls(gsym, GOT_TYPE_DTPREL);
5084 case elfcpp::R_POWERPC_GOT_TPREL16:
5085 case elfcpp::R_POWERPC_GOT_TPREL16_LO:
5086 case elfcpp::R_POWERPC_GOT_TPREL16_HI:
5087 case elfcpp::R_POWERPC_GOT_TPREL16_HA:
5089 const bool final = gsym->final_value_is_known();
5090 const tls::Tls_optimization tls_type = target->optimize_tls_ie(final);
5091 if (tls_type == tls::TLSOPT_NONE)
5093 if (!gsym->has_got_offset(GOT_TYPE_TPREL))
5095 Output_data_got_powerpc<size, big_endian>* got
5096 = target->got_section(symtab, layout);
5097 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
5098 if (gsym->is_undefined()
5099 || gsym->is_from_dynobj())
5101 got->add_global_with_rel(gsym, GOT_TYPE_TPREL, rela_dyn,
5102 elfcpp::R_POWERPC_TPREL);
5106 unsigned int off = got->add_constant(0);
5107 gsym->set_got_offset(GOT_TYPE_TPREL, off);
5108 unsigned int dynrel = elfcpp::R_POWERPC_TPREL;
5109 rela_dyn->add_symbolless_global_addend(gsym, dynrel,
5114 else if (tls_type == tls::TLSOPT_TO_LE)
5116 // no GOT relocs needed for Local Exec.
5124 unsupported_reloc_global(object, r_type, gsym);
5129 // Process relocations for gc.
5131 template<int size, bool big_endian>
5133 Target_powerpc<size, big_endian>::gc_process_relocs(
5134 Symbol_table* symtab,
5136 Sized_relobj_file<size, big_endian>* object,
5137 unsigned int data_shndx,
5139 const unsigned char* prelocs,
5141 Output_section* output_section,
5142 bool needs_special_offset_handling,
5143 size_t local_symbol_count,
5144 const unsigned char* plocal_symbols)
5146 typedef Target_powerpc<size, big_endian> Powerpc;
5147 typedef typename Target_powerpc<size, big_endian>::Scan Scan;
5148 Powerpc_relobj<size, big_endian>* ppc_object
5149 = static_cast<Powerpc_relobj<size, big_endian>*>(object);
5151 ppc_object->set_opd_valid();
5152 if (size == 64 && data_shndx == ppc_object->opd_shndx())
5154 typename Powerpc_relobj<size, big_endian>::Access_from::iterator p;
5155 for (p = ppc_object->access_from_map()->begin();
5156 p != ppc_object->access_from_map()->end();
5159 Address dst_off = p->first;
5160 unsigned int dst_indx = ppc_object->get_opd_ent(dst_off);
5161 typename Powerpc_relobj<size, big_endian>::Section_refs::iterator s;
5162 for (s = p->second.begin(); s != p->second.end(); ++s)
5164 Object* src_obj = s->first;
5165 unsigned int src_indx = s->second;
5166 symtab->gc()->add_reference(src_obj, src_indx,
5167 ppc_object, dst_indx);
5171 ppc_object->access_from_map()->clear();
5172 ppc_object->process_gc_mark(symtab);
5173 // Don't look at .opd relocs as .opd will reference everything.
5177 gold::gc_process_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan,
5178 typename Target_powerpc::Relocatable_size_for_reloc>(
5187 needs_special_offset_handling,
5192 // Handle target specific gc actions when adding a gc reference from
5193 // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
5194 // and DST_OFF. For powerpc64, this adds a referenc to the code
5195 // section of a function descriptor.
5197 template<int size, bool big_endian>
5199 Target_powerpc<size, big_endian>::do_gc_add_reference(
5200 Symbol_table* symtab,
5202 unsigned int src_shndx,
5204 unsigned int dst_shndx,
5205 Address dst_off) const
5207 Powerpc_relobj<size, big_endian>* ppc_object
5208 = static_cast<Powerpc_relobj<size, big_endian>*>(dst_obj);
5210 && !ppc_object->is_dynamic()
5211 && dst_shndx == ppc_object->opd_shndx())
5213 if (ppc_object->opd_valid())
5215 dst_shndx = ppc_object->get_opd_ent(dst_off);
5216 symtab->gc()->add_reference(src_obj, src_shndx, dst_obj, dst_shndx);
5220 // If we haven't run scan_opd_relocs, we must delay
5221 // processing this function descriptor reference.
5222 ppc_object->add_reference(src_obj, src_shndx, dst_off);
5227 // Add any special sections for this symbol to the gc work list.
5228 // For powerpc64, this adds the code section of a function
5231 template<int size, bool big_endian>
5233 Target_powerpc<size, big_endian>::do_gc_mark_symbol(
5234 Symbol_table* symtab,
5239 Powerpc_relobj<size, big_endian>* ppc_object
5240 = static_cast<Powerpc_relobj<size, big_endian>*>(sym->object());
5242 unsigned int shndx = sym->shndx(&is_ordinary);
5243 if (is_ordinary && shndx == ppc_object->opd_shndx())
5245 Sized_symbol<size>* gsym = symtab->get_sized_symbol<size>(sym);
5246 Address dst_off = gsym->value();
5247 if (ppc_object->opd_valid())
5249 unsigned int dst_indx = ppc_object->get_opd_ent(dst_off);
5250 symtab->gc()->worklist().push(Section_id(ppc_object, dst_indx));
5253 ppc_object->add_gc_mark(dst_off);
5258 // Scan relocations for a section.
5260 template<int size, bool big_endian>
5262 Target_powerpc<size, big_endian>::scan_relocs(
5263 Symbol_table* symtab,
5265 Sized_relobj_file<size, big_endian>* object,
5266 unsigned int data_shndx,
5267 unsigned int sh_type,
5268 const unsigned char* prelocs,
5270 Output_section* output_section,
5271 bool needs_special_offset_handling,
5272 size_t local_symbol_count,
5273 const unsigned char* plocal_symbols)
5275 typedef Target_powerpc<size, big_endian> Powerpc;
5276 typedef typename Target_powerpc<size, big_endian>::Scan Scan;
5278 if (sh_type == elfcpp::SHT_REL)
5280 gold_error(_("%s: unsupported REL reloc section"),
5281 object->name().c_str());
5285 gold::scan_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan>(
5294 needs_special_offset_handling,
5299 // Functor class for processing the global symbol table.
5300 // Removes symbols defined on discarded opd entries.
5302 template<bool big_endian>
5303 class Global_symbol_visitor_opd
5306 Global_symbol_visitor_opd()
5310 operator()(Sized_symbol<64>* sym)
5312 if (sym->has_symtab_index()
5313 || sym->source() != Symbol::FROM_OBJECT
5314 || !sym->in_real_elf())
5317 Powerpc_relobj<64, big_endian>* symobj
5318 = static_cast<Powerpc_relobj<64, big_endian>*>(sym->object());
5319 if (symobj->is_dynamic()
5320 || symobj->opd_shndx() == 0)
5324 unsigned int shndx = sym->shndx(&is_ordinary);
5325 if (shndx == symobj->opd_shndx()
5326 && symobj->get_opd_discard(sym->value()))
5327 sym->set_symtab_index(-1U);
5331 template<int size, bool big_endian>
5333 Target_powerpc<size, big_endian>::define_save_restore_funcs(
5335 Symbol_table* symtab)
5339 Output_data_save_res<64, big_endian>* savres
5340 = new Output_data_save_res<64, big_endian>(symtab);
5341 layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS,
5342 elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR,
5343 savres, ORDER_TEXT, false);
5347 // Finalize the sections.
5349 template<int size, bool big_endian>
5351 Target_powerpc<size, big_endian>::do_finalize_sections(
5353 const Input_objects*,
5354 Symbol_table* symtab)
5356 if (parameters->doing_static_link())
5358 // At least some versions of glibc elf-init.o have a strong
5359 // reference to __rela_iplt marker syms. A weak ref would be
5361 if (this->iplt_ != NULL)
5363 Reloc_section* rel = this->iplt_->rel_plt();
5364 symtab->define_in_output_data("__rela_iplt_start", NULL,
5365 Symbol_table::PREDEFINED, rel, 0, 0,
5366 elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
5367 elfcpp::STV_HIDDEN, 0, false, true);
5368 symtab->define_in_output_data("__rela_iplt_end", NULL,
5369 Symbol_table::PREDEFINED, rel, 0, 0,
5370 elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
5371 elfcpp::STV_HIDDEN, 0, true, true);
5375 symtab->define_as_constant("__rela_iplt_start", NULL,
5376 Symbol_table::PREDEFINED, 0, 0,
5377 elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
5378 elfcpp::STV_HIDDEN, 0, true, false);
5379 symtab->define_as_constant("__rela_iplt_end", NULL,
5380 Symbol_table::PREDEFINED, 0, 0,
5381 elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
5382 elfcpp::STV_HIDDEN, 0, true, false);
5388 typedef Global_symbol_visitor_opd<big_endian> Symbol_visitor;
5389 symtab->for_all_symbols<64, Symbol_visitor>(Symbol_visitor());
5391 if (!parameters->options().relocatable())
5393 this->define_save_restore_funcs(layout, symtab);
5395 // Annoyingly, we need to make these sections now whether or
5396 // not we need them. If we delay until do_relax then we
5397 // need to mess with the relaxation machinery checkpointing.
5398 this->got_section(symtab, layout);
5399 this->make_brlt_section(layout);
5403 // Fill in some more dynamic tags.
5404 Output_data_dynamic* odyn = layout->dynamic_data();
5407 const Reloc_section* rel_plt = (this->plt_ == NULL
5409 : this->plt_->rel_plt());
5410 layout->add_target_dynamic_tags(false, this->plt_, rel_plt,
5411 this->rela_dyn_, true, size == 32);
5415 if (this->got_ != NULL)
5417 this->got_->finalize_data_size();
5418 odyn->add_section_plus_offset(elfcpp::DT_PPC_GOT,
5419 this->got_, this->got_->g_o_t());
5424 if (this->glink_ != NULL)
5426 this->glink_->finalize_data_size();
5427 odyn->add_section_plus_offset(elfcpp::DT_PPC64_GLINK,
5429 (this->glink_->pltresolve_size
5435 // Emit any relocs we saved in an attempt to avoid generating COPY
5437 if (this->copy_relocs_.any_saved_relocs())
5438 this->copy_relocs_.emit(this->rela_dyn_section(layout));
5441 // Return TRUE iff INSN is one we expect on a _LO variety toc/got
5445 ok_lo_toc_insn(uint32_t insn)
5447 return ((insn & (0x3f << 26)) == 14u << 26 /* addi */
5448 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
5449 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
5450 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
5451 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
5452 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
5453 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
5454 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
5455 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
5456 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
5457 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
5458 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
5459 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
5460 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
5461 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
5463 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
5464 && ((insn & 3) == 0 || (insn & 3) == 3))
5465 || (insn & (0x3f << 26)) == 12u << 26 /* addic */);
5468 // Return the value to use for a branch relocation.
5470 template<int size, bool big_endian>
5471 typename elfcpp::Elf_types<size>::Elf_Addr
5472 Target_powerpc<size, big_endian>::symval_for_branch(
5474 const Sized_symbol<size>* gsym,
5475 Powerpc_relobj<size, big_endian>* object,
5476 unsigned int *dest_shndx)
5482 // If the symbol is defined in an opd section, ie. is a function
5483 // descriptor, use the function descriptor code entry address
5484 Powerpc_relobj<size, big_endian>* symobj = object;
5486 && gsym->source() != Symbol::FROM_OBJECT)
5489 symobj = static_cast<Powerpc_relobj<size, big_endian>*>(gsym->object());
5490 unsigned int shndx = symobj->opd_shndx();
5493 Address opd_addr = symobj->get_output_section_offset(shndx);
5494 gold_assert(opd_addr != invalid_address);
5495 opd_addr += symobj->output_section(shndx)->address();
5496 if (value >= opd_addr && value < opd_addr + symobj->section_size(shndx))
5499 *dest_shndx = symobj->get_opd_ent(value - opd_addr, &sec_off);
5500 Address sec_addr = symobj->get_output_section_offset(*dest_shndx);
5501 gold_assert(sec_addr != invalid_address);
5502 sec_addr += symobj->output_section(*dest_shndx)->address();
5503 value = sec_addr + sec_off;
5508 // Perform a relocation.
5510 template<int size, bool big_endian>
5512 Target_powerpc<size, big_endian>::Relocate::relocate(
5513 const Relocate_info<size, big_endian>* relinfo,
5514 Target_powerpc* target,
5517 const elfcpp::Rela<size, big_endian>& rela,
5518 unsigned int r_type,
5519 const Sized_symbol<size>* gsym,
5520 const Symbol_value<size>* psymval,
5521 unsigned char* view,
5523 section_size_type view_size)
5525 bool is_tls_call = ((r_type == elfcpp::R_POWERPC_REL24
5526 || r_type == elfcpp::R_PPC_PLTREL24)
5528 && strcmp(gsym->name(), "__tls_get_addr") == 0);
5529 enum skip_tls last_tls = this->call_tls_get_addr_;
5530 this->call_tls_get_addr_ = CALL_NOT_EXPECTED;
5533 if (last_tls == CALL_NOT_EXPECTED)
5534 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
5535 _("__tls_get_addr call lacks marker reloc"));
5536 else if (last_tls == CALL_SKIP)
5539 else if (last_tls != CALL_NOT_EXPECTED)
5540 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
5541 _("missing expected __tls_get_addr call"));
5543 typedef Powerpc_relocate_functions<size, big_endian> Reloc;
5544 typedef typename elfcpp::Swap<32, big_endian>::Valtype Insn;
5545 Powerpc_relobj<size, big_endian>* const object
5546 = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object);
5548 bool has_plt_value = false;
5549 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
5551 ? use_plt_offset<size>(gsym, Scan::get_reference_flags(r_type))
5552 : object->local_has_plt_offset(r_sym))
5554 Stub_table<size, big_endian>* stub_table
5555 = object->stub_table(relinfo->data_shndx);
5556 if (stub_table == NULL)
5558 // This is a ref from a data section to an ifunc symbol.
5559 if (target->stub_tables().size() != 0)
5560 stub_table = target->stub_tables()[0];
5562 gold_assert(stub_table != NULL);
5565 off = stub_table->find_plt_call_entry(object, gsym, r_type,
5566 rela.get_r_addend());
5568 off = stub_table->find_plt_call_entry(object, r_sym, r_type,
5569 rela.get_r_addend());
5570 gold_assert(off != invalid_address);
5571 value = stub_table->stub_address() + off;
5572 has_plt_value = true;
5575 if (r_type == elfcpp::R_POWERPC_GOT16
5576 || r_type == elfcpp::R_POWERPC_GOT16_LO
5577 || r_type == elfcpp::R_POWERPC_GOT16_HI
5578 || r_type == elfcpp::R_POWERPC_GOT16_HA
5579 || r_type == elfcpp::R_PPC64_GOT16_DS
5580 || r_type == elfcpp::R_PPC64_GOT16_LO_DS)
5584 gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD));
5585 value = gsym->got_offset(GOT_TYPE_STANDARD);
5589 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
5590 gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD));
5591 value = object->local_got_offset(r_sym, GOT_TYPE_STANDARD);
5593 value -= target->got_section()->got_base_offset(object);
5595 else if (r_type == elfcpp::R_PPC64_TOC)
5597 value = (target->got_section()->output_section()->address()
5598 + object->toc_base_offset());
5600 else if (gsym != NULL
5601 && (r_type == elfcpp::R_POWERPC_REL24
5602 || r_type == elfcpp::R_PPC_PLTREL24)
5607 typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype;
5608 Valtype* wv = reinterpret_cast<Valtype*>(view);
5609 bool can_plt_call = false;
5610 if (rela.get_r_offset() + 8 <= view_size)
5612 Valtype insn = elfcpp::Swap<32, big_endian>::readval(wv);
5613 Valtype insn2 = elfcpp::Swap<32, big_endian>::readval(wv + 1);
5616 || insn2 == cror_15_15_15 || insn2 == cror_31_31_31))
5618 elfcpp::Swap<32, big_endian>::writeval(wv + 1, ld_2_1 + 40);
5619 can_plt_call = true;
5624 // If we don't have a branch and link followed by a nop,
5625 // we can't go via the plt because there is no place to
5626 // put a toc restoring instruction.
5627 // Unless we know we won't be returning.
5628 if (strcmp(gsym->name(), "__libc_start_main") == 0)
5629 can_plt_call = true;
5633 // This is not an error in one special case: A self
5634 // call. It isn't possible to cheaply verify we have
5635 // such a call so just check for a call to the same
5638 Address code = value;
5639 if (gsym->source() == Symbol::FROM_OBJECT
5640 && gsym->object() == object)
5642 Address addend = rela.get_r_addend();
5643 unsigned int dest_shndx;
5644 Address opdent = psymval->value(object, addend);
5645 code = target->symval_for_branch(opdent, gsym, object,
5648 if (dest_shndx == 0)
5649 dest_shndx = gsym->shndx(&is_ordinary);
5650 ok = dest_shndx == relinfo->data_shndx;
5654 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
5655 _("call lacks nop, can't restore toc; "
5656 "recompile with -fPIC"));
5662 else if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
5663 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO
5664 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI
5665 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA)
5667 // First instruction of a global dynamic sequence, arg setup insn.
5668 const bool final = gsym == NULL || gsym->final_value_is_known();
5669 const tls::Tls_optimization tls_type = target->optimize_tls_gd(final);
5670 enum Got_type got_type = GOT_TYPE_STANDARD;
5671 if (tls_type == tls::TLSOPT_NONE)
5672 got_type = GOT_TYPE_TLSGD;
5673 else if (tls_type == tls::TLSOPT_TO_IE)
5674 got_type = GOT_TYPE_TPREL;
5675 if (got_type != GOT_TYPE_STANDARD)
5679 gold_assert(gsym->has_got_offset(got_type));
5680 value = gsym->got_offset(got_type);
5684 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
5685 gold_assert(object->local_has_got_offset(r_sym, got_type));
5686 value = object->local_got_offset(r_sym, got_type);
5688 value -= target->got_section()->got_base_offset(object);
5690 if (tls_type == tls::TLSOPT_TO_IE)
5692 if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
5693 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO)
5695 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
5696 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
5697 insn &= (1 << 26) - (1 << 16); // extract rt,ra from addi
5699 insn |= 32 << 26; // lwz
5701 insn |= 58 << 26; // ld
5702 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
5704 r_type += (elfcpp::R_POWERPC_GOT_TPREL16
5705 - elfcpp::R_POWERPC_GOT_TLSGD16);
5707 else if (tls_type == tls::TLSOPT_TO_LE)
5709 if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
5710 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO)
5712 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
5713 Insn insn = addis_3_13;
5716 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
5717 r_type = elfcpp::R_POWERPC_TPREL16_HA;
5718 value = psymval->value(object, rela.get_r_addend());
5722 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
5724 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
5725 r_type = elfcpp::R_POWERPC_NONE;
5729 else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16
5730 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO
5731 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI
5732 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA)
5734 // First instruction of a local dynamic sequence, arg setup insn.
5735 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
5736 if (tls_type == tls::TLSOPT_NONE)
5738 value = target->tlsld_got_offset();
5739 value -= target->got_section()->got_base_offset(object);
5743 gold_assert(tls_type == tls::TLSOPT_TO_LE);
5744 if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16
5745 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO)
5747 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
5748 Insn insn = addis_3_13;
5751 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
5752 r_type = elfcpp::R_POWERPC_TPREL16_HA;
5757 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
5759 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
5760 r_type = elfcpp::R_POWERPC_NONE;
5764 else if (r_type == elfcpp::R_POWERPC_GOT_DTPREL16
5765 || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_LO
5766 || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HI
5767 || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HA)
5769 // Accesses relative to a local dynamic sequence address,
5770 // no optimisation here.
5773 gold_assert(gsym->has_got_offset(GOT_TYPE_DTPREL));
5774 value = gsym->got_offset(GOT_TYPE_DTPREL);
5778 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
5779 gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_DTPREL));
5780 value = object->local_got_offset(r_sym, GOT_TYPE_DTPREL);
5782 value -= target->got_section()->got_base_offset(object);
5784 else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16
5785 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO
5786 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI
5787 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA)
5789 // First instruction of initial exec sequence.
5790 const bool final = gsym == NULL || gsym->final_value_is_known();
5791 const tls::Tls_optimization tls_type = target->optimize_tls_ie(final);
5792 if (tls_type == tls::TLSOPT_NONE)
5796 gold_assert(gsym->has_got_offset(GOT_TYPE_TPREL));
5797 value = gsym->got_offset(GOT_TYPE_TPREL);
5801 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
5802 gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_TPREL));
5803 value = object->local_got_offset(r_sym, GOT_TYPE_TPREL);
5805 value -= target->got_section()->got_base_offset(object);
5809 gold_assert(tls_type == tls::TLSOPT_TO_LE);
5810 if (r_type == elfcpp::R_POWERPC_GOT_TPREL16
5811 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO)
5813 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
5814 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
5815 insn &= (1 << 26) - (1 << 21); // extract rt from ld
5820 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
5821 r_type = elfcpp::R_POWERPC_TPREL16_HA;
5822 value = psymval->value(object, rela.get_r_addend());
5826 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
5828 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
5829 r_type = elfcpp::R_POWERPC_NONE;
5833 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD)
5834 || (size == 32 && r_type == elfcpp::R_PPC_TLSGD))
5836 // Second instruction of a global dynamic sequence,
5837 // the __tls_get_addr call
5838 this->call_tls_get_addr_ = CALL_EXPECTED;
5839 const bool final = gsym == NULL || gsym->final_value_is_known();
5840 const tls::Tls_optimization tls_type = target->optimize_tls_gd(final);
5841 if (tls_type != tls::TLSOPT_NONE)
5843 if (tls_type == tls::TLSOPT_TO_IE)
5845 Insn* iview = reinterpret_cast<Insn*>(view);
5846 Insn insn = add_3_3_13;
5849 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
5850 r_type = elfcpp::R_POWERPC_NONE;
5854 Insn* iview = reinterpret_cast<Insn*>(view);
5855 Insn insn = addi_3_3;
5856 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
5857 r_type = elfcpp::R_POWERPC_TPREL16_LO;
5858 view += 2 * big_endian;
5859 value = psymval->value(object, rela.get_r_addend());
5861 this->call_tls_get_addr_ = CALL_SKIP;
5864 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD)
5865 || (size == 32 && r_type == elfcpp::R_PPC_TLSLD))
5867 // Second instruction of a local dynamic sequence,
5868 // the __tls_get_addr call
5869 this->call_tls_get_addr_ = CALL_EXPECTED;
5870 const tls::Tls_optimization tls_type = target->optimize_tls_ld();
5871 if (tls_type == tls::TLSOPT_TO_LE)
5873 Insn* iview = reinterpret_cast<Insn*>(view);
5874 Insn insn = addi_3_3;
5875 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
5876 this->call_tls_get_addr_ = CALL_SKIP;
5877 r_type = elfcpp::R_POWERPC_TPREL16_LO;
5878 view += 2 * big_endian;
5882 else if (r_type == elfcpp::R_POWERPC_TLS)
5884 // Second instruction of an initial exec sequence
5885 const bool final = gsym == NULL || gsym->final_value_is_known();
5886 const tls::Tls_optimization tls_type = target->optimize_tls_ie(final);
5887 if (tls_type == tls::TLSOPT_TO_LE)
5889 Insn* iview = reinterpret_cast<Insn*>(view);
5890 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
5891 unsigned int reg = size == 32 ? 2 : 13;
5892 insn = at_tls_transform(insn, reg);
5893 gold_assert(insn != 0);
5894 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
5895 r_type = elfcpp::R_POWERPC_TPREL16_LO;
5896 view += 2 * big_endian;
5897 value = psymval->value(object, rela.get_r_addend());
5900 else if (!has_plt_value)
5903 unsigned int dest_shndx;
5904 if (r_type != elfcpp::R_PPC_PLTREL24)
5905 addend = rela.get_r_addend();
5906 value = psymval->value(object, addend);
5907 if (size == 64 && is_branch_reloc(r_type))
5908 value = target->symval_for_branch(value, gsym, object, &dest_shndx);
5909 unsigned int max_branch_offset = 0;
5910 if (r_type == elfcpp::R_POWERPC_REL24
5911 || r_type == elfcpp::R_PPC_PLTREL24
5912 || r_type == elfcpp::R_PPC_LOCAL24PC)
5913 max_branch_offset = 1 << 25;
5914 else if (r_type == elfcpp::R_POWERPC_REL14
5915 || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN
5916 || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN)
5917 max_branch_offset = 1 << 15;
5918 if (max_branch_offset != 0
5919 && value - address + max_branch_offset >= 2 * max_branch_offset)
5921 Stub_table<size, big_endian>* stub_table
5922 = object->stub_table(relinfo->data_shndx);
5923 gold_assert(stub_table != NULL);
5924 Address off = stub_table->find_long_branch_entry(object, value);
5925 if (off != invalid_address)
5926 value = stub_table->stub_address() + stub_table->plt_size() + off;
5932 case elfcpp::R_PPC64_REL64:
5933 case elfcpp::R_POWERPC_REL32:
5934 case elfcpp::R_POWERPC_REL24:
5935 case elfcpp::R_PPC_PLTREL24:
5936 case elfcpp::R_PPC_LOCAL24PC:
5937 case elfcpp::R_POWERPC_REL16:
5938 case elfcpp::R_POWERPC_REL16_LO:
5939 case elfcpp::R_POWERPC_REL16_HI:
5940 case elfcpp::R_POWERPC_REL16_HA:
5941 case elfcpp::R_POWERPC_REL14:
5942 case elfcpp::R_POWERPC_REL14_BRTAKEN:
5943 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
5947 case elfcpp::R_PPC64_TOC16:
5948 case elfcpp::R_PPC64_TOC16_LO:
5949 case elfcpp::R_PPC64_TOC16_HI:
5950 case elfcpp::R_PPC64_TOC16_HA:
5951 case elfcpp::R_PPC64_TOC16_DS:
5952 case elfcpp::R_PPC64_TOC16_LO_DS:
5953 // Subtract the TOC base address.
5954 value -= (target->got_section()->output_section()->address()
5955 + object->toc_base_offset());
5958 case elfcpp::R_POWERPC_SECTOFF:
5959 case elfcpp::R_POWERPC_SECTOFF_LO:
5960 case elfcpp::R_POWERPC_SECTOFF_HI:
5961 case elfcpp::R_POWERPC_SECTOFF_HA:
5962 case elfcpp::R_PPC64_SECTOFF_DS:
5963 case elfcpp::R_PPC64_SECTOFF_LO_DS:
5965 value -= os->address();
5968 case elfcpp::R_PPC64_TPREL16_DS:
5969 case elfcpp::R_PPC64_TPREL16_LO_DS:
5971 // R_PPC_TLSGD and R_PPC_TLSLD
5973 case elfcpp::R_POWERPC_TPREL16:
5974 case elfcpp::R_POWERPC_TPREL16_LO:
5975 case elfcpp::R_POWERPC_TPREL16_HI:
5976 case elfcpp::R_POWERPC_TPREL16_HA:
5977 case elfcpp::R_POWERPC_TPREL:
5978 case elfcpp::R_PPC64_TPREL16_HIGHER:
5979 case elfcpp::R_PPC64_TPREL16_HIGHERA:
5980 case elfcpp::R_PPC64_TPREL16_HIGHEST:
5981 case elfcpp::R_PPC64_TPREL16_HIGHESTA:
5982 // tls symbol values are relative to tls_segment()->vaddr()
5986 case elfcpp::R_PPC64_DTPREL16_DS:
5987 case elfcpp::R_PPC64_DTPREL16_LO_DS:
5988 case elfcpp::R_PPC64_DTPREL16_HIGHER:
5989 case elfcpp::R_PPC64_DTPREL16_HIGHERA:
5990 case elfcpp::R_PPC64_DTPREL16_HIGHEST:
5991 case elfcpp::R_PPC64_DTPREL16_HIGHESTA:
5993 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO
5994 // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16
5996 case elfcpp::R_POWERPC_DTPREL16:
5997 case elfcpp::R_POWERPC_DTPREL16_LO:
5998 case elfcpp::R_POWERPC_DTPREL16_HI:
5999 case elfcpp::R_POWERPC_DTPREL16_HA:
6000 case elfcpp::R_POWERPC_DTPREL:
6001 // tls symbol values are relative to tls_segment()->vaddr()
6002 value -= dtp_offset;
6009 Insn branch_bit = 0;
6012 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
6013 case elfcpp::R_POWERPC_REL14_BRTAKEN:
6014 branch_bit = 1 << 21;
6015 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
6016 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
6018 Insn* iview = reinterpret_cast<Insn*>(view);
6019 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
6022 if (this->is_isa_v2)
6024 // Set 'a' bit. This is 0b00010 in BO field for branch
6025 // on CR(BI) insns (BO == 001at or 011at), and 0b01000
6026 // for branch on CTR insns (BO == 1a00t or 1a01t).
6027 if ((insn & (0x14 << 21)) == (0x04 << 21))
6029 else if ((insn & (0x14 << 21)) == (0x10 << 21))
6036 // Invert 'y' bit if not the default.
6037 if (static_cast<Signed_address>(value) < 0)
6040 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
6050 // Multi-instruction sequences that access the TOC can be
6051 // optimized, eg. addis ra,r2,0; addi rb,ra,x;
6052 // to nop; addi rb,r2,x;
6058 case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
6059 case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
6060 case elfcpp::R_POWERPC_GOT_TPREL16_HA:
6061 case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
6062 case elfcpp::R_POWERPC_GOT16_HA:
6063 case elfcpp::R_PPC64_TOC16_HA:
6064 if (!parameters->options().no_toc_optimize())
6066 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
6067 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
6068 if ((insn & ((0x3f << 26) | 0x1f << 16))
6069 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
6070 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
6071 _("toc optimization is not supported "
6072 "for %#08x instruction"), insn);
6073 else if (value + 0x8000 < 0x10000)
6075 elfcpp::Swap<32, big_endian>::writeval(iview, nop);
6081 case elfcpp::R_POWERPC_GOT_TLSLD16_LO:
6082 case elfcpp::R_POWERPC_GOT_TLSGD16_LO:
6083 case elfcpp::R_POWERPC_GOT_TPREL16_LO:
6084 case elfcpp::R_POWERPC_GOT_DTPREL16_LO:
6085 case elfcpp::R_POWERPC_GOT16_LO:
6086 case elfcpp::R_PPC64_GOT16_LO_DS:
6087 case elfcpp::R_PPC64_TOC16_LO:
6088 case elfcpp::R_PPC64_TOC16_LO_DS:
6089 if (!parameters->options().no_toc_optimize())
6091 Insn* iview = reinterpret_cast<Insn*>(view - 2 * big_endian);
6092 Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
6093 if (!ok_lo_toc_insn(insn))
6094 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
6095 _("toc optimization is not supported "
6096 "for %#08x instruction"), insn);
6097 else if (value + 0x8000 < 0x10000)
6099 if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
6101 // Transform addic to addi when we change reg.
6102 insn &= ~((0x3f << 26) | (0x1f << 16));
6103 insn |= (14u << 26) | (2 << 16);
6107 insn &= ~(0x1f << 16);
6110 elfcpp::Swap<32, big_endian>::writeval(iview, insn);
6117 typename Reloc::Overflow_check overflow = Reloc::CHECK_NONE;
6120 case elfcpp::R_POWERPC_ADDR32:
6121 case elfcpp::R_POWERPC_UADDR32:
6123 overflow = Reloc::CHECK_BITFIELD;
6126 case elfcpp::R_POWERPC_REL32:
6128 overflow = Reloc::CHECK_SIGNED;
6131 case elfcpp::R_POWERPC_ADDR24:
6132 case elfcpp::R_POWERPC_ADDR16:
6133 case elfcpp::R_POWERPC_UADDR16:
6134 case elfcpp::R_PPC64_ADDR16_DS:
6135 case elfcpp::R_POWERPC_ADDR14:
6136 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
6137 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
6138 overflow = Reloc::CHECK_BITFIELD;
6141 case elfcpp::R_POWERPC_REL24:
6142 case elfcpp::R_PPC_PLTREL24:
6143 case elfcpp::R_PPC_LOCAL24PC:
6144 case elfcpp::R_POWERPC_REL16:
6145 case elfcpp::R_PPC64_TOC16:
6146 case elfcpp::R_POWERPC_GOT16:
6147 case elfcpp::R_POWERPC_SECTOFF:
6148 case elfcpp::R_POWERPC_TPREL16:
6149 case elfcpp::R_POWERPC_DTPREL16:
6150 case elfcpp::R_PPC64_TPREL16_DS:
6151 case elfcpp::R_PPC64_DTPREL16_DS:
6152 case elfcpp::R_PPC64_TOC16_DS:
6153 case elfcpp::R_PPC64_GOT16_DS:
6154 case elfcpp::R_PPC64_SECTOFF_DS:
6155 case elfcpp::R_POWERPC_REL14:
6156 case elfcpp::R_POWERPC_REL14_BRTAKEN:
6157 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
6158 case elfcpp::R_POWERPC_GOT_TLSGD16:
6159 case elfcpp::R_POWERPC_GOT_TLSLD16:
6160 case elfcpp::R_POWERPC_GOT_TPREL16:
6161 case elfcpp::R_POWERPC_GOT_DTPREL16:
6162 overflow = Reloc::CHECK_SIGNED;
6166 typename Powerpc_relocate_functions<size, big_endian>::Status status
6167 = Powerpc_relocate_functions<size, big_endian>::STATUS_OK;
6170 case elfcpp::R_POWERPC_NONE:
6171 case elfcpp::R_POWERPC_TLS:
6172 case elfcpp::R_POWERPC_GNU_VTINHERIT:
6173 case elfcpp::R_POWERPC_GNU_VTENTRY:
6174 case elfcpp::R_PPC_EMB_MRKREF:
6177 case elfcpp::R_PPC64_ADDR64:
6178 case elfcpp::R_PPC64_REL64:
6179 case elfcpp::R_PPC64_TOC:
6180 Reloc::addr64(view, value);
6183 case elfcpp::R_POWERPC_TPREL:
6184 case elfcpp::R_POWERPC_DTPREL:
6186 Reloc::addr64(view, value);
6188 status = Reloc::addr32(view, value, overflow);
6191 case elfcpp::R_PPC64_UADDR64:
6192 Reloc::addr64_u(view, value);
6195 case elfcpp::R_POWERPC_ADDR32:
6196 status = Reloc::addr32(view, value, overflow);
6199 case elfcpp::R_POWERPC_REL32:
6200 case elfcpp::R_POWERPC_UADDR32:
6201 status = Reloc::addr32_u(view, value, overflow);
6204 case elfcpp::R_POWERPC_ADDR24:
6205 case elfcpp::R_POWERPC_REL24:
6206 case elfcpp::R_PPC_PLTREL24:
6207 case elfcpp::R_PPC_LOCAL24PC:
6208 status = Reloc::addr24(view, value, overflow);
6211 case elfcpp::R_POWERPC_GOT_DTPREL16:
6212 case elfcpp::R_POWERPC_GOT_DTPREL16_LO:
6215 status = Reloc::addr16_ds(view, value, overflow);
6218 case elfcpp::R_POWERPC_ADDR16:
6219 case elfcpp::R_POWERPC_REL16:
6220 case elfcpp::R_PPC64_TOC16:
6221 case elfcpp::R_POWERPC_GOT16:
6222 case elfcpp::R_POWERPC_SECTOFF:
6223 case elfcpp::R_POWERPC_TPREL16:
6224 case elfcpp::R_POWERPC_DTPREL16:
6225 case elfcpp::R_POWERPC_GOT_TLSGD16:
6226 case elfcpp::R_POWERPC_GOT_TLSLD16:
6227 case elfcpp::R_POWERPC_GOT_TPREL16:
6228 case elfcpp::R_POWERPC_ADDR16_LO:
6229 case elfcpp::R_POWERPC_REL16_LO:
6230 case elfcpp::R_PPC64_TOC16_LO:
6231 case elfcpp::R_POWERPC_GOT16_LO:
6232 case elfcpp::R_POWERPC_SECTOFF_LO:
6233 case elfcpp::R_POWERPC_TPREL16_LO:
6234 case elfcpp::R_POWERPC_DTPREL16_LO:
6235 case elfcpp::R_POWERPC_GOT_TLSGD16_LO:
6236 case elfcpp::R_POWERPC_GOT_TLSLD16_LO:
6237 case elfcpp::R_POWERPC_GOT_TPREL16_LO:
6238 status = Reloc::addr16(view, value, overflow);
6241 case elfcpp::R_POWERPC_UADDR16:
6242 status = Reloc::addr16_u(view, value, overflow);
6245 case elfcpp::R_POWERPC_ADDR16_HI:
6246 case elfcpp::R_POWERPC_REL16_HI:
6247 case elfcpp::R_PPC64_TOC16_HI:
6248 case elfcpp::R_POWERPC_GOT16_HI:
6249 case elfcpp::R_POWERPC_SECTOFF_HI:
6250 case elfcpp::R_POWERPC_TPREL16_HI:
6251 case elfcpp::R_POWERPC_DTPREL16_HI:
6252 case elfcpp::R_POWERPC_GOT_TLSGD16_HI:
6253 case elfcpp::R_POWERPC_GOT_TLSLD16_HI:
6254 case elfcpp::R_POWERPC_GOT_TPREL16_HI:
6255 case elfcpp::R_POWERPC_GOT_DTPREL16_HI:
6256 Reloc::addr16_hi(view, value);
6259 case elfcpp::R_POWERPC_ADDR16_HA:
6260 case elfcpp::R_POWERPC_REL16_HA:
6261 case elfcpp::R_PPC64_TOC16_HA:
6262 case elfcpp::R_POWERPC_GOT16_HA:
6263 case elfcpp::R_POWERPC_SECTOFF_HA:
6264 case elfcpp::R_POWERPC_TPREL16_HA:
6265 case elfcpp::R_POWERPC_DTPREL16_HA:
6266 case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
6267 case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
6268 case elfcpp::R_POWERPC_GOT_TPREL16_HA:
6269 case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
6270 Reloc::addr16_ha(view, value);
6273 case elfcpp::R_PPC64_DTPREL16_HIGHER:
6275 // R_PPC_EMB_NADDR16_LO
6277 case elfcpp::R_PPC64_ADDR16_HIGHER:
6278 case elfcpp::R_PPC64_TPREL16_HIGHER:
6279 Reloc::addr16_hi2(view, value);
6282 case elfcpp::R_PPC64_DTPREL16_HIGHERA:
6284 // R_PPC_EMB_NADDR16_HI
6286 case elfcpp::R_PPC64_ADDR16_HIGHERA:
6287 case elfcpp::R_PPC64_TPREL16_HIGHERA:
6288 Reloc::addr16_ha2(view, value);
6291 case elfcpp::R_PPC64_DTPREL16_HIGHEST:
6293 // R_PPC_EMB_NADDR16_HA
6295 case elfcpp::R_PPC64_ADDR16_HIGHEST:
6296 case elfcpp::R_PPC64_TPREL16_HIGHEST:
6297 Reloc::addr16_hi3(view, value);
6300 case elfcpp::R_PPC64_DTPREL16_HIGHESTA:
6304 case elfcpp::R_PPC64_ADDR16_HIGHESTA:
6305 case elfcpp::R_PPC64_TPREL16_HIGHESTA:
6306 Reloc::addr16_ha3(view, value);
6309 case elfcpp::R_PPC64_DTPREL16_DS:
6310 case elfcpp::R_PPC64_DTPREL16_LO_DS:
6312 // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16
6314 case elfcpp::R_PPC64_TPREL16_DS:
6315 case elfcpp::R_PPC64_TPREL16_LO_DS:
6317 // R_PPC_TLSGD, R_PPC_TLSLD
6319 case elfcpp::R_PPC64_ADDR16_DS:
6320 case elfcpp::R_PPC64_ADDR16_LO_DS:
6321 case elfcpp::R_PPC64_TOC16_DS:
6322 case elfcpp::R_PPC64_TOC16_LO_DS:
6323 case elfcpp::R_PPC64_GOT16_DS:
6324 case elfcpp::R_PPC64_GOT16_LO_DS:
6325 case elfcpp::R_PPC64_SECTOFF_DS:
6326 case elfcpp::R_PPC64_SECTOFF_LO_DS:
6327 status = Reloc::addr16_ds(view, value, overflow);
6330 case elfcpp::R_POWERPC_ADDR14:
6331 case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
6332 case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
6333 case elfcpp::R_POWERPC_REL14:
6334 case elfcpp::R_POWERPC_REL14_BRTAKEN:
6335 case elfcpp::R_POWERPC_REL14_BRNTAKEN:
6336 status = Reloc::addr14(view, value, overflow);
6339 case elfcpp::R_POWERPC_COPY:
6340 case elfcpp::R_POWERPC_GLOB_DAT:
6341 case elfcpp::R_POWERPC_JMP_SLOT:
6342 case elfcpp::R_POWERPC_RELATIVE:
6343 case elfcpp::R_POWERPC_DTPMOD:
6344 case elfcpp::R_PPC64_JMP_IREL:
6345 case elfcpp::R_POWERPC_IRELATIVE:
6346 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
6347 _("unexpected reloc %u in object file"),
6351 case elfcpp::R_PPC_EMB_SDA21:
6356 // R_PPC64_TOCSAVE. For the time being this can be ignored.
6360 case elfcpp::R_PPC_EMB_SDA2I16:
6361 case elfcpp::R_PPC_EMB_SDA2REL:
6364 // R_PPC64_TLSGD, R_PPC64_TLSLD
6367 case elfcpp::R_POWERPC_PLT32:
6368 case elfcpp::R_POWERPC_PLTREL32:
6369 case elfcpp::R_POWERPC_PLT16_LO:
6370 case elfcpp::R_POWERPC_PLT16_HI:
6371 case elfcpp::R_POWERPC_PLT16_HA:
6372 case elfcpp::R_PPC_SDAREL16:
6373 case elfcpp::R_POWERPC_ADDR30:
6374 case elfcpp::R_PPC64_PLT64:
6375 case elfcpp::R_PPC64_PLTREL64:
6376 case elfcpp::R_PPC64_PLTGOT16:
6377 case elfcpp::R_PPC64_PLTGOT16_LO:
6378 case elfcpp::R_PPC64_PLTGOT16_HI:
6379 case elfcpp::R_PPC64_PLTGOT16_HA:
6380 case elfcpp::R_PPC64_PLT16_LO_DS:
6381 case elfcpp::R_PPC64_PLTGOT16_DS:
6382 case elfcpp::R_PPC64_PLTGOT16_LO_DS:
6383 case elfcpp::R_PPC_EMB_RELSEC16:
6384 case elfcpp::R_PPC_EMB_RELST_LO:
6385 case elfcpp::R_PPC_EMB_RELST_HI:
6386 case elfcpp::R_PPC_EMB_RELST_HA:
6387 case elfcpp::R_PPC_EMB_BIT_FLD:
6388 case elfcpp::R_PPC_EMB_RELSDA:
6389 case elfcpp::R_PPC_TOC16:
6392 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
6393 _("unsupported reloc %u"),
6397 if (status != Powerpc_relocate_functions<size, big_endian>::STATUS_OK)
6398 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
6399 _("relocation overflow"));
6404 // Relocate section data.
6406 template<int size, bool big_endian>
6408 Target_powerpc<size, big_endian>::relocate_section(
6409 const Relocate_info<size, big_endian>* relinfo,
6410 unsigned int sh_type,
6411 const unsigned char* prelocs,
6413 Output_section* output_section,
6414 bool needs_special_offset_handling,
6415 unsigned char* view,
6417 section_size_type view_size,
6418 const Reloc_symbol_changes* reloc_symbol_changes)
6420 typedef Target_powerpc<size, big_endian> Powerpc;
6421 typedef typename Target_powerpc<size, big_endian>::Relocate Powerpc_relocate;
6422 typedef typename Target_powerpc<size, big_endian>::Relocate_comdat_behavior
6423 Powerpc_comdat_behavior;
6425 gold_assert(sh_type == elfcpp::SHT_RELA);
6427 gold::relocate_section<size, big_endian, Powerpc, elfcpp::SHT_RELA,
6428 Powerpc_relocate, Powerpc_comdat_behavior>(
6434 needs_special_offset_handling,
6438 reloc_symbol_changes);
6441 class Powerpc_scan_relocatable_reloc
6444 // Return the strategy to use for a local symbol which is not a
6445 // section symbol, given the relocation type.
6446 inline Relocatable_relocs::Reloc_strategy
6447 local_non_section_strategy(unsigned int r_type, Relobj*, unsigned int r_sym)
6449 if (r_type == 0 && r_sym == 0)
6450 return Relocatable_relocs::RELOC_DISCARD;
6451 return Relocatable_relocs::RELOC_COPY;
6454 // Return the strategy to use for a local symbol which is a section
6455 // symbol, given the relocation type.
6456 inline Relocatable_relocs::Reloc_strategy
6457 local_section_strategy(unsigned int, Relobj*)
6459 return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA;
6462 // Return the strategy to use for a global symbol, given the
6463 // relocation type, the object, and the symbol index.
6464 inline Relocatable_relocs::Reloc_strategy
6465 global_strategy(unsigned int r_type, Relobj*, unsigned int)
6467 if (r_type == elfcpp::R_PPC_PLTREL24)
6468 return Relocatable_relocs::RELOC_SPECIAL;
6469 return Relocatable_relocs::RELOC_COPY;
6473 // Scan the relocs during a relocatable link.
6475 template<int size, bool big_endian>
6477 Target_powerpc<size, big_endian>::scan_relocatable_relocs(
6478 Symbol_table* symtab,
6480 Sized_relobj_file<size, big_endian>* object,
6481 unsigned int data_shndx,
6482 unsigned int sh_type,
6483 const unsigned char* prelocs,
6485 Output_section* output_section,
6486 bool needs_special_offset_handling,
6487 size_t local_symbol_count,
6488 const unsigned char* plocal_symbols,
6489 Relocatable_relocs* rr)
6491 gold_assert(sh_type == elfcpp::SHT_RELA);
6493 gold::scan_relocatable_relocs<size, big_endian, elfcpp::SHT_RELA,
6494 Powerpc_scan_relocatable_reloc>(
6502 needs_special_offset_handling,
6508 // Emit relocations for a section.
6509 // This is a modified version of the function by the same name in
6510 // target-reloc.h. Using relocate_special_relocatable for
6511 // R_PPC_PLTREL24 would require duplication of the entire body of the
6512 // loop, so we may as well duplicate the whole thing.
6514 template<int size, bool big_endian>
6516 Target_powerpc<size, big_endian>::relocate_relocs(
6517 const Relocate_info<size, big_endian>* relinfo,
6518 unsigned int sh_type,
6519 const unsigned char* prelocs,
6521 Output_section* output_section,
6522 typename elfcpp::Elf_types<size>::Elf_Off offset_in_output_section,
6523 const Relocatable_relocs* rr,
6525 Address view_address,
6527 unsigned char* reloc_view,
6528 section_size_type reloc_view_size)
6530 gold_assert(sh_type == elfcpp::SHT_RELA);
6532 typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc
6534 typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc_write
6536 const int reloc_size
6537 = Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size;
6539 Powerpc_relobj<size, big_endian>* const object
6540 = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object);
6541 const unsigned int local_count = object->local_symbol_count();
6542 unsigned int got2_shndx = object->got2_shndx();
6543 Address got2_addend = 0;
6544 if (got2_shndx != 0)
6546 got2_addend = object->get_output_section_offset(got2_shndx);
6547 gold_assert(got2_addend != invalid_address);
6550 unsigned char* pwrite = reloc_view;
6551 bool zap_next = false;
6552 for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size)
6554 Relocatable_relocs::Reloc_strategy strategy = rr->strategy(i);
6555 if (strategy == Relocatable_relocs::RELOC_DISCARD)
6558 Reltype reloc(prelocs);
6559 Reltype_write reloc_write(pwrite);
6561 Address offset = reloc.get_r_offset();
6562 typename elfcpp::Elf_types<size>::Elf_WXword r_info = reloc.get_r_info();
6563 unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info);
6564 unsigned int r_type = elfcpp::elf_r_type<size>(r_info);
6565 const unsigned int orig_r_sym = r_sym;
6566 typename elfcpp::Elf_types<size>::Elf_Swxword addend
6567 = reloc.get_r_addend();
6568 const Symbol* gsym = NULL;
6572 // We could arrange to discard these and other relocs for
6573 // tls optimised sequences in the strategy methods, but for
6574 // now do as BFD ld does.
6575 r_type = elfcpp::R_POWERPC_NONE;
6579 // Get the new symbol index.
6580 if (r_sym < local_count)
6584 case Relocatable_relocs::RELOC_COPY:
6585 case Relocatable_relocs::RELOC_SPECIAL:
6588 r_sym = object->symtab_index(r_sym);
6589 gold_assert(r_sym != -1U);
6593 case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA:
6595 // We are adjusting a section symbol. We need to find
6596 // the symbol table index of the section symbol for
6597 // the output section corresponding to input section
6598 // in which this symbol is defined.
6599 gold_assert(r_sym < local_count);
6601 unsigned int shndx =
6602 object->local_symbol_input_shndx(r_sym, &is_ordinary);
6603 gold_assert(is_ordinary);
6604 Output_section* os = object->output_section(shndx);
6605 gold_assert(os != NULL);
6606 gold_assert(os->needs_symtab_index());
6607 r_sym = os->symtab_index();
6617 gsym = object->global_symbol(r_sym);
6618 gold_assert(gsym != NULL);
6619 if (gsym->is_forwarder())
6620 gsym = relinfo->symtab->resolve_forwards(gsym);
6622 gold_assert(gsym->has_symtab_index());
6623 r_sym = gsym->symtab_index();
6626 // Get the new offset--the location in the output section where
6627 // this relocation should be applied.
6628 if (static_cast<Address>(offset_in_output_section) != invalid_address)
6629 offset += offset_in_output_section;
6632 section_offset_type sot_offset =
6633 convert_types<section_offset_type, Address>(offset);
6634 section_offset_type new_sot_offset =
6635 output_section->output_offset(object, relinfo->data_shndx,
6637 gold_assert(new_sot_offset != -1);
6638 offset = new_sot_offset;
6641 // In an object file, r_offset is an offset within the section.
6642 // In an executable or dynamic object, generated by
6643 // --emit-relocs, r_offset is an absolute address.
6644 if (!parameters->options().relocatable())
6646 offset += view_address;
6647 if (static_cast<Address>(offset_in_output_section) != invalid_address)
6648 offset -= offset_in_output_section;
6651 // Handle the reloc addend based on the strategy.
6652 if (strategy == Relocatable_relocs::RELOC_COPY)
6654 else if (strategy == Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA)
6656 const Symbol_value<size>* psymval = object->local_symbol(orig_r_sym);
6657 addend = psymval->value(object, addend);
6659 else if (strategy == Relocatable_relocs::RELOC_SPECIAL)
6661 if (addend >= 32768)
6662 addend += got2_addend;
6667 if (!parameters->options().relocatable())
6669 if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
6670 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO
6671 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI
6672 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA)
6674 // First instruction of a global dynamic sequence,
6676 const bool final = gsym == NULL || gsym->final_value_is_known();
6677 switch (this->optimize_tls_gd(final))
6679 case tls::TLSOPT_TO_IE:
6680 r_type += (elfcpp::R_POWERPC_GOT_TPREL16
6681 - elfcpp::R_POWERPC_GOT_TLSGD16);
6683 case tls::TLSOPT_TO_LE:
6684 if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
6685 || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO)
6686 r_type = elfcpp::R_POWERPC_TPREL16_HA;
6689 r_type = elfcpp::R_POWERPC_NONE;
6690 offset -= 2 * big_endian;
6697 else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16
6698 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO
6699 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI
6700 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA)
6702 // First instruction of a local dynamic sequence,
6704 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE)
6706 if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16
6707 || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO)
6709 r_type = elfcpp::R_POWERPC_TPREL16_HA;
6710 const Output_section* os = relinfo->layout->tls_segment()
6712 gold_assert(os != NULL);
6713 gold_assert(os->needs_symtab_index());
6714 r_sym = os->symtab_index();
6715 addend = dtp_offset;
6719 r_type = elfcpp::R_POWERPC_NONE;
6720 offset -= 2 * big_endian;
6724 else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16
6725 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO
6726 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI
6727 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA)
6729 // First instruction of initial exec sequence.
6730 const bool final = gsym == NULL || gsym->final_value_is_known();
6731 if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE)
6733 if (r_type == elfcpp::R_POWERPC_GOT_TPREL16
6734 || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO)
6735 r_type = elfcpp::R_POWERPC_TPREL16_HA;
6738 r_type = elfcpp::R_POWERPC_NONE;
6739 offset -= 2 * big_endian;
6743 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD)
6744 || (size == 32 && r_type == elfcpp::R_PPC_TLSGD))
6746 // Second instruction of a global dynamic sequence,
6747 // the __tls_get_addr call
6748 const bool final = gsym == NULL || gsym->final_value_is_known();
6749 switch (this->optimize_tls_gd(final))
6751 case tls::TLSOPT_TO_IE:
6752 r_type = elfcpp::R_POWERPC_NONE;
6755 case tls::TLSOPT_TO_LE:
6756 r_type = elfcpp::R_POWERPC_TPREL16_LO;
6757 offset += 2 * big_endian;
6764 else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD)
6765 || (size == 32 && r_type == elfcpp::R_PPC_TLSLD))
6767 // Second instruction of a local dynamic sequence,
6768 // the __tls_get_addr call
6769 if (this->optimize_tls_ld() == tls::TLSOPT_TO_LE)
6771 const Output_section* os = relinfo->layout->tls_segment()
6773 gold_assert(os != NULL);
6774 gold_assert(os->needs_symtab_index());
6775 r_sym = os->symtab_index();
6776 addend = dtp_offset;
6777 r_type = elfcpp::R_POWERPC_TPREL16_LO;
6778 offset += 2 * big_endian;
6782 else if (r_type == elfcpp::R_POWERPC_TLS)
6784 // Second instruction of an initial exec sequence
6785 const bool final = gsym == NULL || gsym->final_value_is_known();
6786 if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE)
6788 r_type = elfcpp::R_POWERPC_TPREL16_LO;
6789 offset += 2 * big_endian;
6794 reloc_write.put_r_offset(offset);
6795 reloc_write.put_r_info(elfcpp::elf_r_info<size>(r_sym, r_type));
6796 reloc_write.put_r_addend(addend);
6798 pwrite += reloc_size;
6801 gold_assert(static_cast<section_size_type>(pwrite - reloc_view)
6802 == reloc_view_size);
6805 // Return the value to use for a dynamic symbol which requires special
6806 // treatment. This is how we support equality comparisons of function
6807 // pointers across shared library boundaries, as described in the
6808 // processor specific ABI supplement.
6810 template<int size, bool big_endian>
6812 Target_powerpc<size, big_endian>::do_dynsym_value(const Symbol* gsym) const
6816 gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset());
6817 for (typename Stub_tables::const_iterator p = this->stub_tables_.begin();
6818 p != this->stub_tables_.end();
6821 Address off = (*p)->find_plt_call_entry(gsym);
6822 if (off != invalid_address)
6823 return (*p)->stub_address() + off;
6829 // Return the PLT address to use for a local symbol.
6830 template<int size, bool big_endian>
6832 Target_powerpc<size, big_endian>::do_plt_address_for_local(
6833 const Relobj* object,
6834 unsigned int symndx) const
6838 const Sized_relobj<size, big_endian>* relobj
6839 = static_cast<const Sized_relobj<size, big_endian>*>(object);
6840 for (typename Stub_tables::const_iterator p = this->stub_tables_.begin();
6841 p != this->stub_tables_.end();
6844 Address off = (*p)->find_plt_call_entry(relobj->sized_relobj(),
6846 if (off != invalid_address)
6847 return (*p)->stub_address() + off;
6853 // Return the PLT address to use for a global symbol.
6854 template<int size, bool big_endian>
6856 Target_powerpc<size, big_endian>::do_plt_address_for_global(
6857 const Symbol* gsym) const
6861 for (typename Stub_tables::const_iterator p = this->stub_tables_.begin();
6862 p != this->stub_tables_.end();
6865 Address off = (*p)->find_plt_call_entry(gsym);
6866 if (off != invalid_address)
6867 return (*p)->stub_address() + off;
6873 // Return the offset to use for the GOT_INDX'th got entry which is
6874 // for a local tls symbol specified by OBJECT, SYMNDX.
6875 template<int size, bool big_endian>
6877 Target_powerpc<size, big_endian>::do_tls_offset_for_local(
6878 const Relobj* object,
6879 unsigned int symndx,
6880 unsigned int got_indx) const
6882 const Powerpc_relobj<size, big_endian>* ppc_object
6883 = static_cast<const Powerpc_relobj<size, big_endian>*>(object);
6884 if (ppc_object->local_symbol(symndx)->is_tls_symbol())
6886 for (Got_type got_type = GOT_TYPE_TLSGD;
6887 got_type <= GOT_TYPE_TPREL;
6888 got_type = Got_type(got_type + 1))
6889 if (ppc_object->local_has_got_offset(symndx, got_type))
6891 unsigned int off = ppc_object->local_got_offset(symndx, got_type);
6892 if (got_type == GOT_TYPE_TLSGD)
6894 if (off == got_indx * (size / 8))
6896 if (got_type == GOT_TYPE_TPREL)
6906 // Return the offset to use for the GOT_INDX'th got entry which is
6907 // for global tls symbol GSYM.
6908 template<int size, bool big_endian>
6910 Target_powerpc<size, big_endian>::do_tls_offset_for_global(
6912 unsigned int got_indx) const
6914 if (gsym->type() == elfcpp::STT_TLS)
6916 for (Got_type got_type = GOT_TYPE_TLSGD;
6917 got_type <= GOT_TYPE_TPREL;
6918 got_type = Got_type(got_type + 1))
6919 if (gsym->has_got_offset(got_type))
6921 unsigned int off = gsym->got_offset(got_type);
6922 if (got_type == GOT_TYPE_TLSGD)
6924 if (off == got_indx * (size / 8))
6926 if (got_type == GOT_TYPE_TPREL)
6936 // The selector for powerpc object files.
6938 template<int size, bool big_endian>
6939 class Target_selector_powerpc : public Target_selector
6942 Target_selector_powerpc()
6943 : Target_selector(elfcpp::EM_NONE, size, big_endian,
6945 ? (big_endian ? "elf64-powerpc" : "elf64-powerpcle")
6946 : (big_endian ? "elf32-powerpc" : "elf32-powerpcle")),
6948 ? (big_endian ? "elf64ppc" : "elf64lppc")
6949 : (big_endian ? "elf32ppc" : "elf32lppc")))
6953 do_recognize(Input_file*, off_t, int machine, int, int)
6958 if (machine != elfcpp::EM_PPC64)
6963 if (machine != elfcpp::EM_PPC)
6971 return this->instantiate_target();
6975 do_instantiate_target()
6976 { return new Target_powerpc<size, big_endian>(); }
6979 Target_selector_powerpc<32, true> target_selector_ppc32;
6980 Target_selector_powerpc<32, false> target_selector_ppc32le;
6981 Target_selector_powerpc<64, true> target_selector_ppc64;
6982 Target_selector_powerpc<64, false> target_selector_ppc64le;
6984 // Instantiate these constants for -O0
6985 template<int size, bool big_endian>
6986 const int Output_data_glink<size, big_endian>::pltresolve_size;
6987 template<int size, bool big_endian>
6988 const typename Stub_table<size, big_endian>::Address
6989 Stub_table<size, big_endian>::invalid_address;
6990 template<int size, bool big_endian>
6991 const typename Target_powerpc<size, big_endian>::Address
6992 Target_powerpc<size, big_endian>::invalid_address;
6994 } // End anonymous namespace.